lkml.org 
[lkml]   [2021]   [Jun]   [2]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    From
    Subject[PATCH v4 05/10] cifsd: add smb3 engine part 1
    Date
    This adds server-side procedures for SMB3.

    Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
    Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
    Signed-off-by: Hyunchul Lee <hyc.lee@gmail.com>
    Acked-by: Ronnie Sahlberg <lsahlber@redhat.com>
    Signed-off-by: Steve French <stfrench@microsoft.com>
    ---
    fs/cifsd/smb2ops.c | 300 ++
    fs/cifsd/smb2pdu.c | 8166 ++++++++++++++++++++++++++++++++++++++++++++
    fs/cifsd/smb2pdu.h | 1664 +++++++++
    3 files changed, 10130 insertions(+)
    create mode 100644 fs/cifsd/smb2ops.c
    create mode 100644 fs/cifsd/smb2pdu.c
    create mode 100644 fs/cifsd/smb2pdu.h

    diff --git a/fs/cifsd/smb2ops.c b/fs/cifsd/smb2ops.c
    new file mode 100644
    index 000000000000..c47d60bce9d4
    --- /dev/null
    +++ b/fs/cifsd/smb2ops.c
    @@ -0,0 +1,300 @@
    +// SPDX-License-Identifier: GPL-2.0-or-later
    +/*
    + * Copyright (C) 2016 Namjae Jeon <linkinjeon@kernel.org>
    + * Copyright (C) 2018 Samsung Electronics Co., Ltd.
    + */
    +
    +#include <linux/slab.h>
    +#include "glob.h"
    +#include "smb2pdu.h"
    +
    +#include "auth.h"
    +#include "connection.h"
    +#include "smb_common.h"
    +#include "server.h"
    +#include "ksmbd_server.h"
    +
    +static struct smb_version_values smb21_server_values = {
    + .version_string = SMB21_VERSION_STRING,
    + .protocol_id = SMB21_PROT_ID,
    + .capabilities = SMB2_GLOBAL_CAP_LARGE_MTU,
    + .max_read_size = SMB21_DEFAULT_IOSIZE,
    + .max_write_size = SMB21_DEFAULT_IOSIZE,
    + .max_trans_size = SMB21_DEFAULT_IOSIZE,
    + .large_lock_type = 0,
    + .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
    + .shared_lock_type = SMB2_LOCKFLAG_SHARED,
    + .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
    + .header_size = sizeof(struct smb2_hdr),
    + .max_header_size = MAX_SMB2_HDR_SIZE,
    + .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
    + .lock_cmd = SMB2_LOCK,
    + .cap_unix = 0,
    + .cap_nt_find = SMB2_NT_FIND,
    + .cap_large_files = SMB2_LARGE_FILES,
    + .create_lease_size = sizeof(struct create_lease),
    + .create_durable_size = sizeof(struct create_durable_rsp),
    + .create_mxac_size = sizeof(struct create_mxac_rsp),
    + .create_disk_id_size = sizeof(struct create_disk_id_rsp),
    + .create_posix_size = sizeof(struct create_posix_rsp),
    +};
    +
    +static struct smb_version_values smb30_server_values = {
    + .version_string = SMB30_VERSION_STRING,
    + .protocol_id = SMB30_PROT_ID,
    + .capabilities = SMB2_GLOBAL_CAP_LARGE_MTU,
    + .max_read_size = SMB3_DEFAULT_IOSIZE,
    + .max_write_size = SMB3_DEFAULT_IOSIZE,
    + .max_trans_size = SMB3_DEFAULT_TRANS_SIZE,
    + .large_lock_type = 0,
    + .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
    + .shared_lock_type = SMB2_LOCKFLAG_SHARED,
    + .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
    + .header_size = sizeof(struct smb2_hdr),
    + .max_header_size = MAX_SMB2_HDR_SIZE,
    + .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
    + .lock_cmd = SMB2_LOCK,
    + .cap_unix = 0,
    + .cap_nt_find = SMB2_NT_FIND,
    + .cap_large_files = SMB2_LARGE_FILES,
    + .create_lease_size = sizeof(struct create_lease),
    + .create_durable_size = sizeof(struct create_durable_rsp),
    + .create_durable_v2_size = sizeof(struct create_durable_v2_rsp),
    + .create_mxac_size = sizeof(struct create_mxac_rsp),
    + .create_disk_id_size = sizeof(struct create_disk_id_rsp),
    + .create_posix_size = sizeof(struct create_posix_rsp),
    +};
    +
    +static struct smb_version_values smb302_server_values = {
    + .version_string = SMB302_VERSION_STRING,
    + .protocol_id = SMB302_PROT_ID,
    + .capabilities = SMB2_GLOBAL_CAP_LARGE_MTU,
    + .max_read_size = SMB3_DEFAULT_IOSIZE,
    + .max_write_size = SMB3_DEFAULT_IOSIZE,
    + .max_trans_size = SMB3_DEFAULT_TRANS_SIZE,
    + .large_lock_type = 0,
    + .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
    + .shared_lock_type = SMB2_LOCKFLAG_SHARED,
    + .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
    + .header_size = sizeof(struct smb2_hdr),
    + .max_header_size = MAX_SMB2_HDR_SIZE,
    + .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
    + .lock_cmd = SMB2_LOCK,
    + .cap_unix = 0,
    + .cap_nt_find = SMB2_NT_FIND,
    + .cap_large_files = SMB2_LARGE_FILES,
    + .create_lease_size = sizeof(struct create_lease),
    + .create_durable_size = sizeof(struct create_durable_rsp),
    + .create_durable_v2_size = sizeof(struct create_durable_v2_rsp),
    + .create_mxac_size = sizeof(struct create_mxac_rsp),
    + .create_disk_id_size = sizeof(struct create_disk_id_rsp),
    + .create_posix_size = sizeof(struct create_posix_rsp),
    +};
    +
    +static struct smb_version_values smb311_server_values = {
    + .version_string = SMB311_VERSION_STRING,
    + .protocol_id = SMB311_PROT_ID,
    + .capabilities = SMB2_GLOBAL_CAP_LARGE_MTU,
    + .max_read_size = SMB3_DEFAULT_IOSIZE,
    + .max_write_size = SMB3_DEFAULT_IOSIZE,
    + .max_trans_size = SMB3_DEFAULT_TRANS_SIZE,
    + .large_lock_type = 0,
    + .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
    + .shared_lock_type = SMB2_LOCKFLAG_SHARED,
    + .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
    + .header_size = sizeof(struct smb2_hdr),
    + .max_header_size = MAX_SMB2_HDR_SIZE,
    + .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
    + .lock_cmd = SMB2_LOCK,
    + .cap_unix = 0,
    + .cap_nt_find = SMB2_NT_FIND,
    + .cap_large_files = SMB2_LARGE_FILES,
    + .create_lease_size = sizeof(struct create_lease),
    + .create_durable_size = sizeof(struct create_durable_rsp),
    + .create_durable_v2_size = sizeof(struct create_durable_v2_rsp),
    + .create_mxac_size = sizeof(struct create_mxac_rsp),
    + .create_disk_id_size = sizeof(struct create_disk_id_rsp),
    + .create_posix_size = sizeof(struct create_posix_rsp),
    +};
    +
    +static struct smb_version_ops smb2_0_server_ops = {
    + .get_cmd_val = get_smb2_cmd_val,
    + .init_rsp_hdr = init_smb2_rsp_hdr,
    + .set_rsp_status = set_smb2_rsp_status,
    + .allocate_rsp_buf = smb2_allocate_rsp_buf,
    + .set_rsp_credits = smb2_set_rsp_credits,
    + .check_user_session = smb2_check_user_session,
    + .get_ksmbd_tcon = smb2_get_ksmbd_tcon,
    + .is_sign_req = smb2_is_sign_req,
    + .check_sign_req = smb2_check_sign_req,
    + .set_sign_rsp = smb2_set_sign_rsp
    +};
    +
    +static struct smb_version_ops smb3_0_server_ops = {
    + .get_cmd_val = get_smb2_cmd_val,
    + .init_rsp_hdr = init_smb2_rsp_hdr,
    + .set_rsp_status = set_smb2_rsp_status,
    + .allocate_rsp_buf = smb2_allocate_rsp_buf,
    + .set_rsp_credits = smb2_set_rsp_credits,
    + .check_user_session = smb2_check_user_session,
    + .get_ksmbd_tcon = smb2_get_ksmbd_tcon,
    + .is_sign_req = smb2_is_sign_req,
    + .check_sign_req = smb3_check_sign_req,
    + .set_sign_rsp = smb3_set_sign_rsp,
    + .generate_signingkey = ksmbd_gen_smb30_signingkey,
    + .generate_encryptionkey = ksmbd_gen_smb30_encryptionkey,
    + .is_transform_hdr = smb3_is_transform_hdr,
    + .decrypt_req = smb3_decrypt_req,
    + .encrypt_resp = smb3_encrypt_resp
    +};
    +
    +static struct smb_version_ops smb3_11_server_ops = {
    + .get_cmd_val = get_smb2_cmd_val,
    + .init_rsp_hdr = init_smb2_rsp_hdr,
    + .set_rsp_status = set_smb2_rsp_status,
    + .allocate_rsp_buf = smb2_allocate_rsp_buf,
    + .set_rsp_credits = smb2_set_rsp_credits,
    + .check_user_session = smb2_check_user_session,
    + .get_ksmbd_tcon = smb2_get_ksmbd_tcon,
    + .is_sign_req = smb2_is_sign_req,
    + .check_sign_req = smb3_check_sign_req,
    + .set_sign_rsp = smb3_set_sign_rsp,
    + .generate_signingkey = ksmbd_gen_smb311_signingkey,
    + .generate_encryptionkey = ksmbd_gen_smb311_encryptionkey,
    + .is_transform_hdr = smb3_is_transform_hdr,
    + .decrypt_req = smb3_decrypt_req,
    + .encrypt_resp = smb3_encrypt_resp
    +};
    +
    +static struct smb_version_cmds smb2_0_server_cmds[NUMBER_OF_SMB2_COMMANDS] = {
    + [SMB2_NEGOTIATE_HE] = { .proc = smb2_negotiate_request, },
    + [SMB2_SESSION_SETUP_HE] = { .proc = smb2_sess_setup, },
    + [SMB2_TREE_CONNECT_HE] = { .proc = smb2_tree_connect,},
    + [SMB2_TREE_DISCONNECT_HE] = { .proc = smb2_tree_disconnect,},
    + [SMB2_LOGOFF_HE] = { .proc = smb2_session_logoff,},
    + [SMB2_CREATE_HE] = { .proc = smb2_open},
    + [SMB2_QUERY_INFO_HE] = { .proc = smb2_query_info},
    + [SMB2_QUERY_DIRECTORY_HE] = { .proc = smb2_query_dir},
    + [SMB2_CLOSE_HE] = { .proc = smb2_close},
    + [SMB2_ECHO_HE] = { .proc = smb2_echo},
    + [SMB2_SET_INFO_HE] = { .proc = smb2_set_info},
    + [SMB2_READ_HE] = { .proc = smb2_read},
    + [SMB2_WRITE_HE] = { .proc = smb2_write},
    + [SMB2_FLUSH_HE] = { .proc = smb2_flush},
    + [SMB2_CANCEL_HE] = { .proc = smb2_cancel},
    + [SMB2_LOCK_HE] = { .proc = smb2_lock},
    + [SMB2_IOCTL_HE] = { .proc = smb2_ioctl},
    + [SMB2_OPLOCK_BREAK_HE] = { .proc = smb2_oplock_break},
    + [SMB2_CHANGE_NOTIFY_HE] = { .proc = smb2_notify},
    +};
    +
    +int init_smb2_0_server(struct ksmbd_conn *conn)
    +{
    + return -EOPNOTSUPP;
    +}
    +
    +/**
    + * init_smb2_1_server() - initialize a smb server connection with smb2.1
    + * command dispatcher
    + * @conn: connection instance
    + */
    +void init_smb2_1_server(struct ksmbd_conn *conn)
    +{
    + conn->vals = &smb21_server_values;
    + conn->ops = &smb2_0_server_ops;
    + conn->cmds = smb2_0_server_cmds;
    + conn->max_cmds = ARRAY_SIZE(smb2_0_server_cmds);
    + conn->max_credits = SMB2_MAX_CREDITS;
    +
    + if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_LEASES)
    + conn->vals->capabilities |= SMB2_GLOBAL_CAP_LEASING;
    +}
    +
    +/**
    + * init_smb3_0_server() - initialize a smb server connection with smb3.0
    + * command dispatcher
    + * @conn: connection instance
    + */
    +void init_smb3_0_server(struct ksmbd_conn *conn)
    +{
    + conn->vals = &smb30_server_values;
    + conn->ops = &smb3_0_server_ops;
    + conn->cmds = smb2_0_server_cmds;
    + conn->max_cmds = ARRAY_SIZE(smb2_0_server_cmds);
    + conn->max_credits = SMB2_MAX_CREDITS;
    +
    + if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_LEASES)
    + conn->vals->capabilities |= SMB2_GLOBAL_CAP_LEASING;
    +
    + if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION &&
    + conn->cli_cap & SMB2_GLOBAL_CAP_ENCRYPTION)
    + conn->vals->capabilities |= SMB2_GLOBAL_CAP_ENCRYPTION;
    +}
    +
    +/**
    + * init_smb3_02_server() - initialize a smb server connection with smb3.02
    + * command dispatcher
    + * @conn: connection instance
    + */
    +void init_smb3_02_server(struct ksmbd_conn *conn)
    +{
    + conn->vals = &smb302_server_values;
    + conn->ops = &smb3_0_server_ops;
    + conn->cmds = smb2_0_server_cmds;
    + conn->max_cmds = ARRAY_SIZE(smb2_0_server_cmds);
    + conn->max_credits = SMB2_MAX_CREDITS;
    +
    + if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_LEASES)
    + conn->vals->capabilities |= SMB2_GLOBAL_CAP_LEASING;
    +
    + if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION &&
    + conn->cli_cap & SMB2_GLOBAL_CAP_ENCRYPTION)
    + conn->vals->capabilities |= SMB2_GLOBAL_CAP_ENCRYPTION;
    +}
    +
    +/**
    + * init_smb3_11_server() - initialize a smb server connection with smb3.11
    + * command dispatcher
    + * @conn: connection instance
    + */
    +int init_smb3_11_server(struct ksmbd_conn *conn)
    +{
    + conn->vals = &smb311_server_values;
    + conn->ops = &smb3_11_server_ops;
    + conn->cmds = smb2_0_server_cmds;
    + conn->max_cmds = ARRAY_SIZE(smb2_0_server_cmds);
    + conn->max_credits = SMB2_MAX_CREDITS;
    +
    + if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_LEASES)
    + conn->vals->capabilities |= SMB2_GLOBAL_CAP_LEASING;
    +
    + if (conn->cipher_type)
    + conn->vals->capabilities |= SMB2_GLOBAL_CAP_ENCRYPTION;
    +
    + INIT_LIST_HEAD(&conn->preauth_sess_table);
    + return 0;
    +}
    +
    +void init_smb2_max_read_size(unsigned int sz)
    +{
    + smb21_server_values.max_read_size = sz;
    + smb30_server_values.max_read_size = sz;
    + smb302_server_values.max_read_size = sz;
    + smb311_server_values.max_read_size = sz;
    +}
    +
    +void init_smb2_max_write_size(unsigned int sz)
    +{
    + smb21_server_values.max_write_size = sz;
    + smb30_server_values.max_write_size = sz;
    + smb302_server_values.max_write_size = sz;
    + smb311_server_values.max_write_size = sz;
    +}
    +
    +void init_smb2_max_trans_size(unsigned int sz)
    +{
    + smb21_server_values.max_trans_size = sz;
    + smb30_server_values.max_trans_size = sz;
    + smb302_server_values.max_trans_size = sz;
    + smb311_server_values.max_trans_size = sz;
    +}
    diff --git a/fs/cifsd/smb2pdu.c b/fs/cifsd/smb2pdu.c
    new file mode 100644
    index 000000000000..3e112fbdc2d9
    --- /dev/null
    +++ b/fs/cifsd/smb2pdu.c
    @@ -0,0 +1,8166 @@
    +// SPDX-License-Identifier: GPL-2.0-or-later
    +/*
    + * Copyright (C) 2016 Namjae Jeon <linkinjeon@kernel.org>
    + * Copyright (C) 2018 Samsung Electronics Co., Ltd.
    + */
    +
    +#include <linux/inetdevice.h>
    +#include <net/addrconf.h>
    +#include <linux/syscalls.h>
    +#include <linux/namei.h>
    +#include <linux/statfs.h>
    +#include <linux/ethtool.h>
    +
    +#include "glob.h"
    +#include "smb2pdu.h"
    +#include "smbfsctl.h"
    +#include "oplock.h"
    +#include "smbacl.h"
    +
    +#include "auth.h"
    +#include "asn1.h"
    +#include "buffer_pool.h"
    +#include "connection.h"
    +#include "transport_ipc.h"
    +#include "vfs.h"
    +#include "vfs_cache.h"
    +#include "misc.h"
    +
    +#include "server.h"
    +#include "smb_common.h"
    +#include "smbstatus.h"
    +#include "ksmbd_work.h"
    +#include "mgmt/user_config.h"
    +#include "mgmt/share_config.h"
    +#include "mgmt/tree_connect.h"
    +#include "mgmt/user_session.h"
    +#include "mgmt/ksmbd_ida.h"
    +#include "ndr.h"
    +
    +static void __wbuf(struct ksmbd_work *work, void **req, void **rsp)
    +{
    + if (work->next_smb2_rcv_hdr_off) {
    + *req = REQUEST_BUF_NEXT(work);
    + *rsp = RESPONSE_BUF_NEXT(work);
    + } else {
    + *req = work->request_buf;
    + *rsp = work->response_buf;
    + }
    +}
    +
    +#define WORK_BUFFERS(w, rq, rs) __wbuf((w), (void **)&(rq), (void **)&(rs))
    +
    +/**
    + * check_session_id() - check for valid session id in smb header
    + * @conn: connection instance
    + * @id: session id from smb header
    + *
    + * Return: 1 if valid session id, otherwise 0
    + */
    +static inline int check_session_id(struct ksmbd_conn *conn, u64 id)
    +{
    + struct ksmbd_session *sess;
    +
    + if (id == 0 || id == -1)
    + return 0;
    +
    + sess = ksmbd_session_lookup(conn, id);
    + if (sess)
    + return 1;
    + ksmbd_err("Invalid user session id: %llu\n", id);
    + return 0;
    +}
    +
    +struct channel *lookup_chann_list(struct ksmbd_session *sess)
    +{
    + struct channel *chann;
    + struct list_head *t;
    +
    + list_for_each(t, &sess->ksmbd_chann_list) {
    + chann = list_entry(t, struct channel, chann_list);
    + if (chann && chann->conn == sess->conn)
    + return chann;
    + }
    +
    + return NULL;
    +}
    +
    +/**
    + * smb2_get_ksmbd_tcon() - get tree connection information for a tree id
    + * @work: smb work
    + *
    + * Return: matching tree connection on success, otherwise error
    + */
    +int smb2_get_ksmbd_tcon(struct ksmbd_work *work)
    +{
    + struct smb2_hdr *req_hdr = work->request_buf;
    + int tree_id;
    +
    + work->tcon = NULL;
    + if (work->conn->ops->get_cmd_val(work) == SMB2_TREE_CONNECT_HE ||
    + work->conn->ops->get_cmd_val(work) == SMB2_CANCEL_HE ||
    + work->conn->ops->get_cmd_val(work) == SMB2_LOGOFF_HE) {
    + ksmbd_debug(SMB, "skip to check tree connect request\n");
    + return 0;
    + }
    +
    + if (xa_empty(&work->sess->tree_conns)) {
    + ksmbd_debug(SMB, "NO tree connected\n");
    + return -1;
    + }
    +
    + tree_id = le32_to_cpu(req_hdr->Id.SyncId.TreeId);
    + work->tcon = ksmbd_tree_conn_lookup(work->sess, tree_id);
    + if (!work->tcon) {
    + ksmbd_err("Invalid tid %d\n", tree_id);
    + return -1;
    + }
    +
    + return 1;
    +}
    +
    +/**
    + * smb2_set_err_rsp() - set error response code on smb response
    + * @work: smb work containing response buffer
    + */
    +void smb2_set_err_rsp(struct ksmbd_work *work)
    +{
    + struct smb2_err_rsp *err_rsp;
    +
    + if (work->next_smb2_rcv_hdr_off)
    + err_rsp = RESPONSE_BUF_NEXT(work);
    + else
    + err_rsp = work->response_buf;
    +
    + if (err_rsp->hdr.Status != STATUS_STOPPED_ON_SYMLINK) {
    + err_rsp->StructureSize = SMB2_ERROR_STRUCTURE_SIZE2_LE;
    + err_rsp->ErrorContextCount = 0;
    + err_rsp->Reserved = 0;
    + err_rsp->ByteCount = 0;
    + err_rsp->ErrorData[0] = 0;
    + inc_rfc1001_len(work->response_buf, SMB2_ERROR_STRUCTURE_SIZE2);
    + }
    +}
    +
    +/**
    + * is_smb2_neg_cmd() - is it smb2 negotiation command
    + * @work: smb work containing smb header
    + *
    + * Return: 1 if smb2 negotiation command, otherwise 0
    + */
    +int is_smb2_neg_cmd(struct ksmbd_work *work)
    +{
    + struct smb2_hdr *hdr = work->request_buf;
    +
    + /* is it SMB2 header ? */
    + if (hdr->ProtocolId != SMB2_PROTO_NUMBER)
    + return 0;
    +
    + /* make sure it is request not response message */
    + if (hdr->Flags & SMB2_FLAGS_SERVER_TO_REDIR)
    + return 0;
    +
    + if (hdr->Command != SMB2_NEGOTIATE)
    + return 0;
    +
    + return 1;
    +}
    +
    +/**
    + * is_smb2_rsp() - is it smb2 response
    + * @work: smb work containing smb response buffer
    + *
    + * Return: 1 if smb2 response, otherwise 0
    + */
    +int is_smb2_rsp(struct ksmbd_work *work)
    +{
    + struct smb2_hdr *hdr = work->response_buf;
    +
    + /* is it SMB2 header ? */
    + if (hdr->ProtocolId != SMB2_PROTO_NUMBER)
    + return 0;
    +
    + /* make sure it is response not request message */
    + if (!(hdr->Flags & SMB2_FLAGS_SERVER_TO_REDIR))
    + return 0;
    +
    + return 1;
    +}
    +
    +/**
    + * get_smb2_cmd_val() - get smb command code from smb header
    + * @work: smb work containing smb request buffer
    + *
    + * Return: smb2 request command value
    + */
    +u16 get_smb2_cmd_val(struct ksmbd_work *work)
    +{
    + struct smb2_hdr *rcv_hdr;
    +
    + if (work->next_smb2_rcv_hdr_off)
    + rcv_hdr = REQUEST_BUF_NEXT(work);
    + else
    + rcv_hdr = work->request_buf;
    + return le16_to_cpu(rcv_hdr->Command);
    +}
    +
    +/**
    + * set_smb2_rsp_status() - set error response code on smb2 header
    + * @work: smb work containing response buffer
    + * @err: error response code
    + */
    +void set_smb2_rsp_status(struct ksmbd_work *work, __le32 err)
    +{
    + struct smb2_hdr *rsp_hdr;
    +
    + if (work->next_smb2_rcv_hdr_off)
    + rsp_hdr = RESPONSE_BUF_NEXT(work);
    + else
    + rsp_hdr = work->response_buf;
    + rsp_hdr->Status = err;
    + smb2_set_err_rsp(work);
    +}
    +
    +/**
    + * init_smb2_neg_rsp() - initialize smb2 response for negotiate command
    + * @work: smb work containing smb request buffer
    + *
    + * smb2 negotiate response is sent in reply of smb1 negotiate command for
    + * dialect auto-negotiation.
    + */
    +int init_smb2_neg_rsp(struct ksmbd_work *work)
    +{
    + struct smb2_hdr *rsp_hdr;
    + struct smb2_negotiate_rsp *rsp;
    + struct ksmbd_conn *conn = work->conn;
    +
    + if (conn->need_neg == false)
    + return -EINVAL;
    + if (!(conn->dialect >= SMB20_PROT_ID &&
    + conn->dialect <= SMB311_PROT_ID))
    + return -EINVAL;
    +
    + rsp_hdr = work->response_buf;
    +
    + memset(rsp_hdr, 0, sizeof(struct smb2_hdr) + 2);
    +
    + rsp_hdr->smb2_buf_length =
    + cpu_to_be32(HEADER_SIZE_NO_BUF_LEN(conn));
    +
    + rsp_hdr->ProtocolId = SMB2_PROTO_NUMBER;
    + rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE;
    + rsp_hdr->CreditRequest = cpu_to_le16(2);
    + rsp_hdr->Command = SMB2_NEGOTIATE;
    + rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR);
    + rsp_hdr->NextCommand = 0;
    + rsp_hdr->MessageId = 0;
    + rsp_hdr->Id.SyncId.ProcessId = 0;
    + rsp_hdr->Id.SyncId.TreeId = 0;
    + rsp_hdr->SessionId = 0;
    + memset(rsp_hdr->Signature, 0, 16);
    +
    + rsp = work->response_buf;
    +
    + WARN_ON(ksmbd_conn_good(work));
    +
    + rsp->StructureSize = cpu_to_le16(65);
    + ksmbd_debug(SMB, "conn->dialect 0x%x\n", conn->dialect);
    + rsp->DialectRevision = cpu_to_le16(conn->dialect);
    + /* Not setting conn guid rsp->ServerGUID, as it
    + * not used by client for identifying connection
    + */
    + rsp->Capabilities = cpu_to_le32(conn->vals->capabilities);
    + /* Default Max Message Size till SMB2.0, 64K*/
    + rsp->MaxTransactSize = cpu_to_le32(conn->vals->max_trans_size);
    + rsp->MaxReadSize = cpu_to_le32(conn->vals->max_read_size);
    + rsp->MaxWriteSize = cpu_to_le32(conn->vals->max_write_size);
    +
    + rsp->SystemTime = cpu_to_le64(ksmbd_systime());
    + rsp->ServerStartTime = 0;
    +
    + rsp->SecurityBufferOffset = cpu_to_le16(128);
    + rsp->SecurityBufferLength = cpu_to_le16(AUTH_GSS_LENGTH);
    + ksmbd_copy_gss_neg_header(((char *)(&rsp->hdr) +
    + sizeof(rsp->hdr.smb2_buf_length)) +
    + le16_to_cpu(rsp->SecurityBufferOffset));
    + inc_rfc1001_len(rsp, sizeof(struct smb2_negotiate_rsp) -
    + sizeof(struct smb2_hdr) - sizeof(rsp->Buffer) +
    + AUTH_GSS_LENGTH);
    + rsp->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED_LE;
    + if (server_conf.signing == KSMBD_CONFIG_OPT_MANDATORY)
    + rsp->SecurityMode |= SMB2_NEGOTIATE_SIGNING_REQUIRED_LE;
    + conn->use_spnego = true;
    +
    + ksmbd_conn_set_need_negotiate(work);
    + return 0;
    +}
    +
    +static int smb2_consume_credit_charge(struct ksmbd_work *work,
    + unsigned short credit_charge)
    +{
    + struct ksmbd_conn *conn = work->conn;
    + unsigned int rsp_credits = 1;
    +
    + if (!conn->total_credits)
    + return 0;
    +
    + if (credit_charge > 0)
    + rsp_credits = credit_charge;
    +
    + conn->total_credits -= rsp_credits;
    + return rsp_credits;
    +}
    +
    +/**
    + * smb2_set_rsp_credits() - set number of credits in response buffer
    + * @work: smb work containing smb response buffer
    + */
    +int smb2_set_rsp_credits(struct ksmbd_work *work)
    +{
    + struct smb2_hdr *req_hdr = REQUEST_BUF_NEXT(work);
    + struct smb2_hdr *hdr = RESPONSE_BUF_NEXT(work);
    + struct ksmbd_conn *conn = work->conn;
    + unsigned short credits_requested = le16_to_cpu(req_hdr->CreditRequest);
    + unsigned short credit_charge = 1, credits_granted = 0;
    + unsigned short aux_max, aux_credits, min_credits;
    + int rsp_credit_charge;
    +
    + if (hdr->Command == SMB2_CANCEL)
    + goto out;
    +
    + /* get default minimum credits by shifting maximum credits by 4 */
    + min_credits = conn->max_credits >> 4;
    +
    + if (conn->total_credits >= conn->max_credits) {
    + ksmbd_err("Total credits overflow: %d\n", conn->total_credits);
    + conn->total_credits = min_credits;
    + }
    +
    + rsp_credit_charge =
    + smb2_consume_credit_charge(work, le16_to_cpu(req_hdr->CreditCharge));
    + if (rsp_credit_charge < 0)
    + return -EINVAL;
    +
    + hdr->CreditCharge = cpu_to_le16(rsp_credit_charge);
    +
    + if (credits_requested > 0) {
    + aux_credits = credits_requested - 1;
    + aux_max = 32;
    + if (hdr->Command == SMB2_NEGOTIATE)
    + aux_max = 0;
    + aux_credits = (aux_credits < aux_max) ? aux_credits : aux_max;
    + credits_granted = aux_credits + credit_charge;
    +
    + /* if credits granted per client is getting bigger than default
    + * minimum credits then we should wrap it up within the limits.
    + */
    + if ((conn->total_credits + credits_granted) > min_credits)
    + credits_granted = min_credits - conn->total_credits;
    + /*
    + * TODO: Need to adjuct CreditRequest value according to
    + * current cpu load
    + */
    + } else if (conn->total_credits == 0) {
    + credits_granted = 1;
    + }
    +
    + conn->total_credits += credits_granted;
    + work->credits_granted += credits_granted;
    +
    + if (!req_hdr->NextCommand) {
    + /* Update CreditRequest in last request */
    + hdr->CreditRequest = cpu_to_le16(work->credits_granted);
    + }
    +out:
    + ksmbd_debug(SMB,
    + "credits: requested[%d] granted[%d] total_granted[%d]\n",
    + credits_requested, credits_granted,
    + conn->total_credits);
    + return 0;
    +}
    +
    +/**
    + * init_chained_smb2_rsp() - initialize smb2 chained response
    + * @work: smb work containing smb response buffer
    + */
    +static void init_chained_smb2_rsp(struct ksmbd_work *work)
    +{
    + struct smb2_hdr *req = REQUEST_BUF_NEXT(work);
    + struct smb2_hdr *rsp = RESPONSE_BUF_NEXT(work);
    + struct smb2_hdr *rsp_hdr;
    + struct smb2_hdr *rcv_hdr;
    + int next_hdr_offset = 0;
    + int len, new_len;
    +
    + /* Len of this response = updated RFC len - offset of previous cmd
    + * in the compound rsp
    + */
    +
    + /* Storing the current local FID which may be needed by subsequent
    + * command in the compound request
    + */
    + if (req->Command == SMB2_CREATE && rsp->Status == STATUS_SUCCESS) {
    + work->compound_fid =
    + le64_to_cpu(((struct smb2_create_rsp *)rsp)->
    + VolatileFileId);
    + work->compound_pfid =
    + le64_to_cpu(((struct smb2_create_rsp *)rsp)->
    + PersistentFileId);
    + work->compound_sid = le64_to_cpu(rsp->SessionId);
    + }
    +
    + len = get_rfc1002_len(work->response_buf) - work->next_smb2_rsp_hdr_off;
    + next_hdr_offset = le32_to_cpu(req->NextCommand);
    +
    + new_len = ALIGN(len, 8);
    + inc_rfc1001_len(work->response_buf, ((sizeof(struct smb2_hdr) - 4)
    + + new_len - len));
    + rsp->NextCommand = cpu_to_le32(new_len);
    +
    + work->next_smb2_rcv_hdr_off += next_hdr_offset;
    + work->next_smb2_rsp_hdr_off += new_len;
    + ksmbd_debug(SMB,
    + "Compound req new_len = %d rcv off = %d rsp off = %d\n",
    + new_len, work->next_smb2_rcv_hdr_off,
    + work->next_smb2_rsp_hdr_off);
    +
    + rsp_hdr = RESPONSE_BUF_NEXT(work);
    + rcv_hdr = REQUEST_BUF_NEXT(work);
    +
    + if (!(rcv_hdr->Flags & SMB2_FLAGS_RELATED_OPERATIONS)) {
    + ksmbd_debug(SMB, "related flag should be set\n");
    + work->compound_fid = KSMBD_NO_FID;
    + work->compound_pfid = KSMBD_NO_FID;
    + }
    + memset((char *)rsp_hdr + 4, 0, sizeof(struct smb2_hdr) + 2);
    + rsp_hdr->ProtocolId = rcv_hdr->ProtocolId;
    + rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE;
    + rsp_hdr->Command = rcv_hdr->Command;
    +
    + /*
    + * Message is response. We don't grant oplock yet.
    + */
    + rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR |
    + SMB2_FLAGS_RELATED_OPERATIONS);
    + rsp_hdr->NextCommand = 0;
    + rsp_hdr->MessageId = rcv_hdr->MessageId;
    + rsp_hdr->Id.SyncId.ProcessId = rcv_hdr->Id.SyncId.ProcessId;
    + rsp_hdr->Id.SyncId.TreeId = rcv_hdr->Id.SyncId.TreeId;
    + rsp_hdr->SessionId = rcv_hdr->SessionId;
    + memcpy(rsp_hdr->Signature, rcv_hdr->Signature, 16);
    +}
    +
    +/**
    + * is_chained_smb2_message() - check for chained command
    + * @work: smb work containing smb request buffer
    + *
    + * Return: true if chained request, otherwise false
    + */
    +bool is_chained_smb2_message(struct ksmbd_work *work)
    +{
    + struct smb2_hdr *hdr = work->request_buf;
    + unsigned int len;
    +
    + if (hdr->ProtocolId != SMB2_PROTO_NUMBER)
    + return false;
    +
    + hdr = REQUEST_BUF_NEXT(work);
    + if (le32_to_cpu(hdr->NextCommand) > 0) {
    + ksmbd_debug(SMB, "got SMB2 chained command\n");
    + init_chained_smb2_rsp(work);
    + return true;
    + } else if (work->next_smb2_rcv_hdr_off) {
    + /*
    + * This is last request in chained command,
    + * align response to 8 byte
    + */
    + len = ALIGN(get_rfc1002_len(work->response_buf), 8);
    + len = len - get_rfc1002_len(work->response_buf);
    + if (len) {
    + ksmbd_debug(SMB, "padding len %u\n", len);
    + inc_rfc1001_len(work->response_buf, len);
    + if (work->aux_payload_sz)
    + work->aux_payload_sz += len;
    + }
    + }
    + return false;
    +}
    +
    +/**
    + * init_smb2_rsp_hdr() - initialize smb2 response
    + * @work: smb work containing smb request buffer
    + *
    + * Return: 0
    + */
    +int init_smb2_rsp_hdr(struct ksmbd_work *work)
    +{
    + struct smb2_hdr *rsp_hdr = work->response_buf;
    + struct smb2_hdr *rcv_hdr = work->request_buf;
    + struct ksmbd_conn *conn = work->conn;
    +
    + memset(rsp_hdr, 0, sizeof(struct smb2_hdr) + 2);
    + rsp_hdr->smb2_buf_length = cpu_to_be32(HEADER_SIZE_NO_BUF_LEN(conn));
    + rsp_hdr->ProtocolId = rcv_hdr->ProtocolId;
    + rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE;
    + rsp_hdr->Command = rcv_hdr->Command;
    +
    + /*
    + * Message is response. We don't grant oplock yet.
    + */
    + rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR);
    + rsp_hdr->NextCommand = 0;
    + rsp_hdr->MessageId = rcv_hdr->MessageId;
    + rsp_hdr->Id.SyncId.ProcessId = rcv_hdr->Id.SyncId.ProcessId;
    + rsp_hdr->Id.SyncId.TreeId = rcv_hdr->Id.SyncId.TreeId;
    + rsp_hdr->SessionId = rcv_hdr->SessionId;
    + memcpy(rsp_hdr->Signature, rcv_hdr->Signature, 16);
    +
    + work->syncronous = true;
    + if (work->async_id) {
    + ksmbd_release_id(&conn->async_ida, work->async_id);
    + work->async_id = 0;
    + }
    +
    + return 0;
    +}
    +
    +/**
    + * smb2_allocate_rsp_buf() - allocate smb2 response buffer
    + * @work: smb work containing smb request buffer
    + *
    + * Return: 0 on success, otherwise -ENOMEM
    + */
    +int smb2_allocate_rsp_buf(struct ksmbd_work *work)
    +{
    + struct smb2_hdr *hdr = work->request_buf;
    + size_t small_sz = MAX_CIFS_SMALL_BUFFER_SIZE;
    + size_t large_sz = work->conn->vals->max_trans_size + MAX_SMB2_HDR_SIZE;
    + size_t sz = small_sz;
    + int cmd = le16_to_cpu(hdr->Command);
    +
    + if (cmd == SMB2_IOCTL_HE || cmd == SMB2_QUERY_DIRECTORY_HE) {
    + sz = large_sz;
    + work->set_trans_buf = true;
    + }
    +
    + if (cmd == SMB2_QUERY_INFO_HE) {
    + struct smb2_query_info_req *req;
    +
    + req = work->request_buf;
    + if (req->InfoType == SMB2_O_INFO_FILE &&
    + (req->FileInfoClass == FILE_FULL_EA_INFORMATION ||
    + req->FileInfoClass == FILE_ALL_INFORMATION)) {
    + sz = large_sz;
    + work->set_trans_buf = true;
    + }
    + }
    +
    + /* allocate large response buf for chained commands */
    + if (le32_to_cpu(hdr->NextCommand) > 0)
    + sz = large_sz;
    +
    + if (server_conf.flags & KSMBD_GLOBAL_FLAG_CACHE_TBUF &&
    + work->set_trans_buf)
    + work->response_buf = ksmbd_find_buffer(sz);
    + else
    + work->response_buf = kvmalloc(sz, GFP_KERNEL | __GFP_ZERO);
    +
    + if (!work->response_buf)
    + return -ENOMEM;
    +
    + work->response_sz = sz;
    + return 0;
    +}
    +
    +/**
    + * smb2_check_user_session() - check for valid session for a user
    + * @work: smb work containing smb request buffer
    + *
    + * Return: 0 on success, otherwise error
    + */
    +int smb2_check_user_session(struct ksmbd_work *work)
    +{
    + struct smb2_hdr *req_hdr = work->request_buf;
    + struct ksmbd_conn *conn = work->conn;
    + unsigned int cmd = conn->ops->get_cmd_val(work);
    + unsigned long long sess_id;
    +
    + work->sess = NULL;
    + /*
    + * SMB2_ECHO, SMB2_NEGOTIATE, SMB2_SESSION_SETUP command do not
    + * require a session id, so no need to validate user session's for
    + * these commands.
    + */
    + if (cmd == SMB2_ECHO_HE || cmd == SMB2_NEGOTIATE_HE ||
    + cmd == SMB2_SESSION_SETUP_HE)
    + return 0;
    +
    + if (!ksmbd_conn_good(work))
    + return -EINVAL;
    +
    + sess_id = le64_to_cpu(req_hdr->SessionId);
    + /* Check for validity of user session */
    + work->sess = ksmbd_session_lookup(conn, sess_id);
    + if (work->sess)
    + return 1;
    + ksmbd_debug(SMB, "Invalid user session, Uid %llu\n", sess_id);
    + return -EINVAL;
    +}
    +
    +static void destroy_previous_session(struct ksmbd_user *user, u64 id)
    +{
    + struct ksmbd_session *prev_sess = ksmbd_session_lookup_slowpath(id);
    + struct ksmbd_user *prev_user;
    +
    + if (!prev_sess)
    + return;
    +
    + prev_user = prev_sess->user;
    +
    + if (!prev_user ||
    + strcmp(user->name, prev_user->name) ||
    + user->passkey_sz != prev_user->passkey_sz ||
    + memcmp(user->passkey, prev_user->passkey, user->passkey_sz)) {
    + put_session(prev_sess);
    + return;
    + }
    +
    + put_session(prev_sess);
    + ksmbd_session_destroy(prev_sess);
    +}
    +
    +/**
    + * smb2_get_name() - get filename string from on the wire smb format
    + * @share: ksmbd_share_config pointer
    + * @src: source buffer
    + * @maxlen: maxlen of source string
    + * @nls_table: nls_table pointer
    + *
    + * Return: matching converted filename on success, otherwise error ptr
    + */
    +static char *
    +smb2_get_name(struct ksmbd_share_config *share, const char *src,
    + const int maxlen, struct nls_table *local_nls)
    +{
    + char *name, *unixname;
    +
    + name = smb_strndup_from_utf16(src, maxlen, 1, local_nls);
    + if (IS_ERR(name)) {
    + ksmbd_err("failed to get name %ld\n", PTR_ERR(name));
    + return name;
    + }
    +
    + /* change it to absolute unix name */
    + ksmbd_conv_path_to_unix(name);
    + ksmbd_strip_last_slash(name);
    +
    + unixname = convert_to_unix_name(share, name);
    + kfree(name);
    + if (!unixname) {
    + ksmbd_err("can not convert absolute name\n");
    + return ERR_PTR(-ENOMEM);
    + }
    +
    + ksmbd_debug(SMB, "absolute name = %s\n", unixname);
    + return unixname;
    +}
    +
    +int setup_async_work(struct ksmbd_work *work, void (*fn)(void **), void **arg)
    +{
    + struct smb2_hdr *rsp_hdr;
    + struct ksmbd_conn *conn = work->conn;
    + int id;
    +
    + rsp_hdr = work->response_buf;
    + rsp_hdr->Flags |= SMB2_FLAGS_ASYNC_COMMAND;
    +
    + id = ksmbd_acquire_async_msg_id(&conn->async_ida);
    + if (id < 0) {
    + ksmbd_err("Failed to alloc async message id\n");
    + return id;
    + }
    + work->syncronous = false;
    + work->async_id = id;
    + rsp_hdr->Id.AsyncId = cpu_to_le64(id);
    +
    + ksmbd_debug(SMB,
    + "Send interim Response to inform async request id : %d\n",
    + work->async_id);
    +
    + work->cancel_fn = fn;
    + work->cancel_argv = arg;
    +
    + spin_lock(&conn->request_lock);
    + list_add_tail(&work->async_request_entry, &conn->async_requests);
    + spin_unlock(&conn->request_lock);
    +
    + return 0;
    +}
    +
    +void smb2_send_interim_resp(struct ksmbd_work *work, __le32 status)
    +{
    + struct smb2_hdr *rsp_hdr;
    +
    + rsp_hdr = work->response_buf;
    + smb2_set_err_rsp(work);
    + rsp_hdr->Status = status;
    +
    + work->multiRsp = 1;
    + ksmbd_conn_write(work);
    + rsp_hdr->Status = 0;
    + work->multiRsp = 0;
    +}
    +
    +static __le32 smb2_get_reparse_tag_special_file(umode_t mode)
    +{
    + if (S_ISDIR(mode) || S_ISREG(mode))
    + return 0;
    +
    + if (S_ISLNK(mode))
    + return IO_REPARSE_TAG_LX_SYMLINK_LE;
    + else if (S_ISFIFO(mode))
    + return IO_REPARSE_TAG_LX_FIFO_LE;
    + else if (S_ISSOCK(mode))
    + return IO_REPARSE_TAG_AF_UNIX_LE;
    + else if (S_ISCHR(mode))
    + return IO_REPARSE_TAG_LX_CHR_LE;
    + else if (S_ISBLK(mode))
    + return IO_REPARSE_TAG_LX_BLK_LE;
    +
    + return 0;
    +}
    +
    +/**
    + * smb2_get_dos_mode() - get file mode in dos format from unix mode
    + * @stat: kstat containing file mode
    + * @attribute: attribute flags
    + *
    + * Return: converted dos mode
    + */
    +static int smb2_get_dos_mode(struct kstat *stat, int attribute)
    +{
    + int attr = 0;
    +
    + if (S_ISDIR(stat->mode)) {
    + attr = ATTR_DIRECTORY |
    + (attribute & (ATTR_HIDDEN | ATTR_SYSTEM));
    + } else {
    + attr = (attribute & 0x00005137) | ATTR_ARCHIVE;
    + attr &= ~(ATTR_DIRECTORY);
    + if (S_ISREG(stat->mode) && (server_conf.share_fake_fscaps &
    + FILE_SUPPORTS_SPARSE_FILES))
    + attr |= ATTR_SPARSE;
    +
    + if (smb2_get_reparse_tag_special_file(stat->mode))
    + attr |= ATTR_REPARSE;
    + }
    +
    + return attr;
    +}
    +
    +static void build_preauth_ctxt(struct smb2_preauth_neg_context *pneg_ctxt,
    + __le16 hash_id)
    +{
    + pneg_ctxt->ContextType = SMB2_PREAUTH_INTEGRITY_CAPABILITIES;
    + pneg_ctxt->DataLength = cpu_to_le16(38);
    + pneg_ctxt->HashAlgorithmCount = cpu_to_le16(1);
    + pneg_ctxt->Reserved = cpu_to_le32(0);
    + pneg_ctxt->SaltLength = cpu_to_le16(SMB311_SALT_SIZE);
    + get_random_bytes(pneg_ctxt->Salt, SMB311_SALT_SIZE);
    + pneg_ctxt->HashAlgorithms = hash_id;
    +}
    +
    +static void build_encrypt_ctxt(struct smb2_encryption_neg_context *pneg_ctxt,
    + __le16 cipher_type)
    +{
    + pneg_ctxt->ContextType = SMB2_ENCRYPTION_CAPABILITIES;
    + pneg_ctxt->DataLength = cpu_to_le16(4);
    + pneg_ctxt->Reserved = cpu_to_le32(0);
    + pneg_ctxt->CipherCount = cpu_to_le16(1);
    + pneg_ctxt->Ciphers[0] = cipher_type;
    +}
    +
    +static void build_compression_ctxt(struct smb2_compression_ctx *pneg_ctxt,
    + __le16 comp_algo)
    +{
    + pneg_ctxt->ContextType = SMB2_COMPRESSION_CAPABILITIES;
    + pneg_ctxt->DataLength =
    + cpu_to_le16(sizeof(struct smb2_compression_ctx)
    + - sizeof(struct smb2_neg_context));
    + pneg_ctxt->Reserved = cpu_to_le32(0);
    + pneg_ctxt->CompressionAlgorithmCount = cpu_to_le16(1);
    + pneg_ctxt->Reserved1 = cpu_to_le32(0);
    + pneg_ctxt->CompressionAlgorithms[0] = comp_algo;
    +}
    +
    +static void build_posix_ctxt(struct smb2_posix_neg_context *pneg_ctxt)
    +{
    + pneg_ctxt->ContextType = SMB2_POSIX_EXTENSIONS_AVAILABLE;
    + pneg_ctxt->DataLength = cpu_to_le16(POSIX_CTXT_DATA_LEN);
    + /* SMB2_CREATE_TAG_POSIX is "0x93AD25509CB411E7B42383DE968BCD7C" */
    + pneg_ctxt->Name[0] = 0x93;
    + pneg_ctxt->Name[1] = 0xAD;
    + pneg_ctxt->Name[2] = 0x25;
    + pneg_ctxt->Name[3] = 0x50;
    + pneg_ctxt->Name[4] = 0x9C;
    + pneg_ctxt->Name[5] = 0xB4;
    + pneg_ctxt->Name[6] = 0x11;
    + pneg_ctxt->Name[7] = 0xE7;
    + pneg_ctxt->Name[8] = 0xB4;
    + pneg_ctxt->Name[9] = 0x23;
    + pneg_ctxt->Name[10] = 0x83;
    + pneg_ctxt->Name[11] = 0xDE;
    + pneg_ctxt->Name[12] = 0x96;
    + pneg_ctxt->Name[13] = 0x8B;
    + pneg_ctxt->Name[14] = 0xCD;
    + pneg_ctxt->Name[15] = 0x7C;
    +}
    +
    +static void assemble_neg_contexts(struct ksmbd_conn *conn,
    + struct smb2_negotiate_rsp *rsp)
    +{
    + /* +4 is to account for the RFC1001 len field */
    + char *pneg_ctxt = (char *)rsp +
    + le32_to_cpu(rsp->NegotiateContextOffset) + 4;
    + int neg_ctxt_cnt = 1;
    + int ctxt_size;
    +
    + ksmbd_debug(SMB,
    + "assemble SMB2_PREAUTH_INTEGRITY_CAPABILITIES context\n");
    + build_preauth_ctxt((struct smb2_preauth_neg_context *)pneg_ctxt,
    + conn->preauth_info->Preauth_HashId);
    + rsp->NegotiateContextCount = cpu_to_le16(neg_ctxt_cnt);
    + inc_rfc1001_len(rsp, AUTH_GSS_PADDING);
    + ctxt_size = sizeof(struct smb2_preauth_neg_context);
    + /* Round to 8 byte boundary */
    + pneg_ctxt += round_up(sizeof(struct smb2_preauth_neg_context), 8);
    +
    + if (conn->cipher_type) {
    + ctxt_size = round_up(ctxt_size, 8);
    + ksmbd_debug(SMB,
    + "assemble SMB2_ENCRYPTION_CAPABILITIES context\n");
    + build_encrypt_ctxt((struct smb2_encryption_neg_context *)pneg_ctxt,
    + conn->cipher_type);
    + rsp->NegotiateContextCount = cpu_to_le16(++neg_ctxt_cnt);
    + ctxt_size += sizeof(struct smb2_encryption_neg_context);
    + /* Round to 8 byte boundary */
    + pneg_ctxt +=
    + round_up(sizeof(struct smb2_encryption_neg_context),
    + 8);
    + }
    +
    + if (conn->compress_algorithm) {
    + ctxt_size = round_up(ctxt_size, 8);
    + ksmbd_debug(SMB,
    + "assemble SMB2_COMPRESSION_CAPABILITIES context\n");
    + /* Temporarily set to SMB3_COMPRESS_NONE */
    + build_compression_ctxt((struct smb2_compression_ctx *)pneg_ctxt,
    + conn->compress_algorithm);
    + rsp->NegotiateContextCount = cpu_to_le16(++neg_ctxt_cnt);
    + ctxt_size += sizeof(struct smb2_compression_ctx);
    + /* Round to 8 byte boundary */
    + pneg_ctxt += round_up(sizeof(struct smb2_compression_ctx), 8);
    + }
    +
    + if (conn->posix_ext_supported) {
    + ctxt_size = round_up(ctxt_size, 8);
    + ksmbd_debug(SMB,
    + "assemble SMB2_POSIX_EXTENSIONS_AVAILABLE context\n");
    + build_posix_ctxt((struct smb2_posix_neg_context *)pneg_ctxt);
    + rsp->NegotiateContextCount = cpu_to_le16(++neg_ctxt_cnt);
    + ctxt_size += sizeof(struct smb2_posix_neg_context);
    + }
    +
    + inc_rfc1001_len(rsp, ctxt_size);
    +}
    +
    +static __le32 decode_preauth_ctxt(struct ksmbd_conn *conn,
    + struct smb2_preauth_neg_context *pneg_ctxt)
    +{
    + __le32 err = STATUS_NO_PREAUTH_INTEGRITY_HASH_OVERLAP;
    +
    + if (pneg_ctxt->HashAlgorithms == SMB2_PREAUTH_INTEGRITY_SHA512) {
    + conn->preauth_info->Preauth_HashId =
    + SMB2_PREAUTH_INTEGRITY_SHA512;
    + err = STATUS_SUCCESS;
    + }
    +
    + return err;
    +}
    +
    +static int decode_encrypt_ctxt(struct ksmbd_conn *conn,
    + struct smb2_encryption_neg_context *pneg_ctxt)
    +{
    + int i;
    + int cph_cnt = le16_to_cpu(pneg_ctxt->CipherCount);
    +
    + conn->cipher_type = 0;
    +
    + if (!(server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION))
    + goto out;
    +
    + for (i = 0; i < cph_cnt; i++) {
    + if (pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES128_GCM ||
    + pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES128_CCM ||
    + pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES256_CCM ||
    + pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES256_GCM) {
    + ksmbd_debug(SMB, "Cipher ID = 0x%x\n",
    + pneg_ctxt->Ciphers[i]);
    + conn->cipher_type = pneg_ctxt->Ciphers[i];
    + break;
    + }
    + }
    +
    +out:
    + /*
    + * Return encrypt context size in request.
    + * So need to plus extra number of ciphers size.
    + */
    + return sizeof(struct smb2_encryption_neg_context) +
    + ((cph_cnt - 1) * 2);
    +}
    +
    +static int decode_compress_ctxt(struct ksmbd_conn *conn,
    + struct smb2_compression_ctx *pneg_ctxt)
    +{
    + int algo_cnt = le16_to_cpu(pneg_ctxt->CompressionAlgorithmCount);
    +
    + conn->compress_algorithm = SMB3_COMPRESS_NONE;
    +
    + /*
    + * Return compression context size in request.
    + * So need to plus extra number of CompressionAlgorithms size.
    + */
    + return sizeof(struct smb2_encryption_neg_context) +
    + ((algo_cnt - 1) * 2);
    +}
    +
    +static __le32 deassemble_neg_contexts(struct ksmbd_conn *conn,
    + struct smb2_negotiate_req *req)
    +{
    + int i = 0;
    + __le32 status = 0;
    + /* +4 is to account for the RFC1001 len field */
    + char *pneg_ctxt = (char *)req +
    + le32_to_cpu(req->NegotiateContextOffset) + 4;
    + __le16 *ContextType = (__le16 *)pneg_ctxt;
    + int neg_ctxt_cnt = le16_to_cpu(req->NegotiateContextCount);
    + int ctxt_size;
    +
    + ksmbd_debug(SMB, "negotiate context count = %d\n", neg_ctxt_cnt);
    + status = STATUS_INVALID_PARAMETER;
    + while (i++ < neg_ctxt_cnt) {
    + if (*ContextType == SMB2_PREAUTH_INTEGRITY_CAPABILITIES) {
    + ksmbd_debug(SMB,
    + "deassemble SMB2_PREAUTH_INTEGRITY_CAPABILITIES context\n");
    + if (conn->preauth_info->Preauth_HashId)
    + break;
    +
    + status = decode_preauth_ctxt(conn,
    + (struct smb2_preauth_neg_context *)pneg_ctxt);
    + pneg_ctxt += DIV_ROUND_UP(sizeof(struct smb2_preauth_neg_context), 8) * 8;
    + } else if (*ContextType == SMB2_ENCRYPTION_CAPABILITIES) {
    + ksmbd_debug(SMB,
    + "deassemble SMB2_ENCRYPTION_CAPABILITIES context\n");
    + if (conn->cipher_type)
    + break;
    +
    + ctxt_size = decode_encrypt_ctxt(conn,
    + (struct smb2_encryption_neg_context *)pneg_ctxt);
    + pneg_ctxt += DIV_ROUND_UP(ctxt_size, 8) * 8;
    + } else if (*ContextType == SMB2_COMPRESSION_CAPABILITIES) {
    + ksmbd_debug(SMB,
    + "deassemble SMB2_COMPRESSION_CAPABILITIES context\n");
    + if (conn->compress_algorithm)
    + break;
    +
    + ctxt_size = decode_compress_ctxt(conn,
    + (struct smb2_compression_ctx *)pneg_ctxt);
    + pneg_ctxt += DIV_ROUND_UP(ctxt_size, 8) * 8;
    + } else if (*ContextType == SMB2_NETNAME_NEGOTIATE_CONTEXT_ID) {
    + ksmbd_debug(SMB,
    + "deassemble SMB2_NETNAME_NEGOTIATE_CONTEXT_ID context\n");
    + ctxt_size = sizeof(struct smb2_netname_neg_context);
    + ctxt_size += DIV_ROUND_UP(le16_to_cpu(((struct smb2_netname_neg_context *)
    + pneg_ctxt)->DataLength), 8) * 8;
    + pneg_ctxt += ctxt_size;
    + } else if (*ContextType == SMB2_POSIX_EXTENSIONS_AVAILABLE) {
    + ksmbd_debug(SMB,
    + "deassemble SMB2_POSIX_EXTENSIONS_AVAILABLE context\n");
    + conn->posix_ext_supported = true;
    + pneg_ctxt += DIV_ROUND_UP(sizeof(struct smb2_posix_neg_context), 8) * 8;
    + }
    + ContextType = (__le16 *)pneg_ctxt;
    +
    + if (status != STATUS_SUCCESS)
    + break;
    + }
    + return status;
    +}
    +
    +/**
    + * smb2_handle_negotiate() - handler for smb2 negotiate command
    + * @work: smb work containing smb request buffer
    + *
    + * Return: 0
    + */
    +int smb2_handle_negotiate(struct ksmbd_work *work)
    +{
    + struct ksmbd_conn *conn = work->conn;
    + struct smb2_negotiate_req *req = work->request_buf;
    + struct smb2_negotiate_rsp *rsp = work->response_buf;
    + int rc = 0;
    + __le32 status;
    +
    + ksmbd_debug(SMB, "Received negotiate request\n");
    + conn->need_neg = false;
    + if (ksmbd_conn_good(work)) {
    + ksmbd_err("conn->tcp_status is already in CifsGood State\n");
    + work->send_no_response = 1;
    + return rc;
    + }
    +
    + if (req->DialectCount == 0) {
    + ksmbd_err("malformed packet\n");
    + rsp->hdr.Status = STATUS_INVALID_PARAMETER;
    + rc = -EINVAL;
    + goto err_out;
    + }
    +
    + conn->cli_cap = le32_to_cpu(req->Capabilities);
    + switch (conn->dialect) {
    + case SMB311_PROT_ID:
    + conn->preauth_info =
    + kzalloc(sizeof(struct preauth_integrity_info),
    + GFP_KERNEL);
    + if (!conn->preauth_info) {
    + rc = -ENOMEM;
    + rsp->hdr.Status = STATUS_INVALID_PARAMETER;
    + goto err_out;
    + }
    +
    + status = deassemble_neg_contexts(conn, req);
    + if (status != STATUS_SUCCESS) {
    + ksmbd_err("deassemble_neg_contexts error(0x%x)\n",
    + status);
    + rsp->hdr.Status = status;
    + rc = -EINVAL;
    + goto err_out;
    + }
    +
    + rc = init_smb3_11_server(conn);
    + if (rc < 0) {
    + rsp->hdr.Status = STATUS_INVALID_PARAMETER;
    + goto err_out;
    + }
    +
    + ksmbd_gen_preauth_integrity_hash(conn,
    + work->request_buf,
    + conn->preauth_info->Preauth_HashValue);
    + rsp->NegotiateContextOffset =
    + cpu_to_le32(OFFSET_OF_NEG_CONTEXT);
    + assemble_neg_contexts(conn, rsp);
    + break;
    + case SMB302_PROT_ID:
    + init_smb3_02_server(conn);
    + break;
    + case SMB30_PROT_ID:
    + init_smb3_0_server(conn);
    + break;
    + case SMB21_PROT_ID:
    + init_smb2_1_server(conn);
    + break;
    + case SMB20_PROT_ID:
    + rc = init_smb2_0_server(conn);
    + if (rc) {
    + rsp->hdr.Status = STATUS_NOT_SUPPORTED;
    + goto err_out;
    + }
    + break;
    + case SMB2X_PROT_ID:
    + case BAD_PROT_ID:
    + default:
    + ksmbd_debug(SMB, "Server dialect :0x%x not supported\n",
    + conn->dialect);
    + rsp->hdr.Status = STATUS_NOT_SUPPORTED;
    + rc = -EINVAL;
    + goto err_out;
    + }
    + rsp->Capabilities = cpu_to_le32(conn->vals->capabilities);
    +
    + /* For stats */
    + conn->connection_type = conn->dialect;
    +
    + rsp->MaxTransactSize = cpu_to_le32(conn->vals->max_trans_size);
    + rsp->MaxReadSize = cpu_to_le32(conn->vals->max_read_size);
    + rsp->MaxWriteSize = cpu_to_le32(conn->vals->max_write_size);
    +
    + if (conn->dialect > SMB20_PROT_ID) {
    + memcpy(conn->ClientGUID, req->ClientGUID,
    + SMB2_CLIENT_GUID_SIZE);
    + conn->cli_sec_mode = le16_to_cpu(req->SecurityMode);
    + }
    +
    + rsp->StructureSize = cpu_to_le16(65);
    + rsp->DialectRevision = cpu_to_le16(conn->dialect);
    + /* Not setting conn guid rsp->ServerGUID, as it
    + * not used by client for identifying server
    + */
    + memset(rsp->ServerGUID, 0, SMB2_CLIENT_GUID_SIZE);
    +
    + rsp->SystemTime = cpu_to_le64(ksmbd_systime());
    + rsp->ServerStartTime = 0;
    + ksmbd_debug(SMB, "negotiate context offset %d, count %d\n",
    + le32_to_cpu(rsp->NegotiateContextOffset),
    + le16_to_cpu(rsp->NegotiateContextCount));
    +
    + rsp->SecurityBufferOffset = cpu_to_le16(128);
    + rsp->SecurityBufferLength = cpu_to_le16(AUTH_GSS_LENGTH);
    + ksmbd_copy_gss_neg_header(((char *)(&rsp->hdr) +
    + sizeof(rsp->hdr.smb2_buf_length)) +
    + le16_to_cpu(rsp->SecurityBufferOffset));
    + inc_rfc1001_len(rsp, sizeof(struct smb2_negotiate_rsp) -
    + sizeof(struct smb2_hdr) - sizeof(rsp->Buffer) +
    + AUTH_GSS_LENGTH);
    + rsp->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED_LE;
    + conn->use_spnego = true;
    +
    + if ((server_conf.signing == KSMBD_CONFIG_OPT_AUTO ||
    + server_conf.signing == KSMBD_CONFIG_OPT_DISABLED) &&
    + req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED_LE)
    + conn->sign = true;
    + else if (server_conf.signing == KSMBD_CONFIG_OPT_MANDATORY) {
    + server_conf.enforced_signing = true;
    + rsp->SecurityMode |= SMB2_NEGOTIATE_SIGNING_REQUIRED_LE;
    + conn->sign = true;
    + }
    +
    + conn->srv_sec_mode = le16_to_cpu(rsp->SecurityMode);
    + ksmbd_conn_set_need_negotiate(work);
    +
    +err_out:
    + if (rc < 0)
    + smb2_set_err_rsp(work);
    +
    + return rc;
    +}
    +
    +static int alloc_preauth_hash(struct ksmbd_session *sess,
    + struct ksmbd_conn *conn)
    +{
    + if (sess->Preauth_HashValue)
    + return 0;
    +
    + sess->Preauth_HashValue = kmemdup(conn->preauth_info->Preauth_HashValue,
    + PREAUTH_HASHVALUE_SIZE, GFP_KERNEL);
    + if (!sess->Preauth_HashValue)
    + return -ENOMEM;
    +
    + return 0;
    +}
    +
    +static int generate_preauth_hash(struct ksmbd_work *work)
    +{
    + struct ksmbd_conn *conn = work->conn;
    + struct ksmbd_session *sess = work->sess;
    +
    + if (conn->dialect != SMB311_PROT_ID)
    + return 0;
    +
    + if (!sess->Preauth_HashValue) {
    + if (alloc_preauth_hash(sess, conn))
    + return -ENOMEM;
    + }
    +
    + ksmbd_gen_preauth_integrity_hash(conn,
    + work->request_buf,
    + sess->Preauth_HashValue);
    + return 0;
    +}
    +
    +static int decode_negotiation_token(struct ksmbd_work *work,
    + struct negotiate_message *negblob)
    +{
    + struct ksmbd_conn *conn = work->conn;
    + struct smb2_sess_setup_req *req;
    + int sz;
    +
    + if (!conn->use_spnego)
    + return -EINVAL;
    +
    + req = work->request_buf;
    + sz = le16_to_cpu(req->SecurityBufferLength);
    +
    + if (ksmbd_decode_negTokenInit((char *)negblob, sz, conn)) {
    + if (ksmbd_decode_negTokenTarg((char *)negblob, sz, conn)) {
    + conn->auth_mechs |= KSMBD_AUTH_NTLMSSP;
    + conn->preferred_auth_mech = KSMBD_AUTH_NTLMSSP;
    + conn->use_spnego = false;
    + }
    + }
    + return 0;
    +}
    +
    +static int ntlm_negotiate(struct ksmbd_work *work,
    + struct negotiate_message *negblob)
    +{
    + struct smb2_sess_setup_req *req = work->request_buf;
    + struct smb2_sess_setup_rsp *rsp = work->response_buf;
    + struct challenge_message *chgblob;
    + unsigned char *spnego_blob = NULL;
    + u16 spnego_blob_len;
    + char *neg_blob;
    + int sz, rc;
    +
    + ksmbd_debug(SMB, "negotiate phase\n");
    + sz = le16_to_cpu(req->SecurityBufferLength);
    + rc = ksmbd_decode_ntlmssp_neg_blob(negblob, sz, work->sess);
    + if (rc)
    + return rc;
    +
    + sz = le16_to_cpu(rsp->SecurityBufferOffset);
    + chgblob =
    + (struct challenge_message *)((char *)&rsp->hdr.ProtocolId + sz);
    + memset(chgblob, 0, sizeof(struct challenge_message));
    +
    + if (!work->conn->use_spnego) {
    + sz = ksmbd_build_ntlmssp_challenge_blob(chgblob, work->sess);
    + if (sz < 0)
    + return -ENOMEM;
    +
    + rsp->SecurityBufferLength = cpu_to_le16(sz);
    + return 0;
    + }
    +
    + sz = sizeof(struct challenge_message);
    + sz += (strlen(ksmbd_netbios_name()) * 2 + 1 + 4) * 6;
    +
    + neg_blob = kzalloc(sz, GFP_KERNEL);
    + if (!neg_blob)
    + return -ENOMEM;
    +
    + chgblob = (struct challenge_message *)neg_blob;
    + sz = ksmbd_build_ntlmssp_challenge_blob(chgblob, work->sess);
    + if (sz < 0) {
    + rc = -ENOMEM;
    + goto out;
    + }
    +
    + rc = build_spnego_ntlmssp_neg_blob(&spnego_blob, &spnego_blob_len,
    + neg_blob, sz);
    + if (rc) {
    + rc = -ENOMEM;
    + goto out;
    + }
    +
    + sz = le16_to_cpu(rsp->SecurityBufferOffset);
    + memcpy((char *)&rsp->hdr.ProtocolId + sz, spnego_blob, spnego_blob_len);
    + rsp->SecurityBufferLength = cpu_to_le16(spnego_blob_len);
    +
    +out:
    + kfree(spnego_blob);
    + kfree(neg_blob);
    + return rc;
    +}
    +
    +static struct authenticate_message *user_authblob(struct ksmbd_conn *conn,
    + struct smb2_sess_setup_req *req)
    +{
    + int sz;
    +
    + if (conn->use_spnego && conn->mechToken)
    + return (struct authenticate_message *)conn->mechToken;
    +
    + sz = le16_to_cpu(req->SecurityBufferOffset);
    + return (struct authenticate_message *)((char *)&req->hdr.ProtocolId
    + + sz);
    +}
    +
    +static struct ksmbd_user *session_user(struct ksmbd_conn *conn,
    + struct smb2_sess_setup_req *req)
    +{
    + struct authenticate_message *authblob;
    + struct ksmbd_user *user;
    + char *name;
    + int sz;
    +
    + authblob = user_authblob(conn, req);
    + sz = le32_to_cpu(authblob->UserName.BufferOffset);
    + name = smb_strndup_from_utf16((const char *)authblob + sz,
    + le16_to_cpu(authblob->UserName.Length),
    + true,
    + conn->local_nls);
    + if (IS_ERR(name)) {
    + ksmbd_err("cannot allocate memory\n");
    + return NULL;
    + }
    +
    + ksmbd_debug(SMB, "session setup request for user %s\n", name);
    + user = ksmbd_login_user(name);
    + kfree(name);
    + return user;
    +}
    +
    +static int ntlm_authenticate(struct ksmbd_work *work)
    +{
    + struct smb2_sess_setup_req *req = work->request_buf;
    + struct smb2_sess_setup_rsp *rsp = work->response_buf;
    + struct ksmbd_conn *conn = work->conn;
    + struct ksmbd_session *sess = work->sess;
    + struct channel *chann = NULL;
    + struct ksmbd_user *user;
    + u64 prev_id;
    + int sz, rc;
    +
    + ksmbd_debug(SMB, "authenticate phase\n");
    + if (conn->use_spnego) {
    + unsigned char *spnego_blob;
    + u16 spnego_blob_len;
    +
    + rc = build_spnego_ntlmssp_auth_blob(&spnego_blob,
    + &spnego_blob_len,
    + 0);
    + if (rc)
    + return -ENOMEM;
    +
    + sz = le16_to_cpu(rsp->SecurityBufferOffset);
    + memcpy((char *)&rsp->hdr.ProtocolId + sz, spnego_blob, spnego_blob_len);
    + rsp->SecurityBufferLength = cpu_to_le16(spnego_blob_len);
    + kfree(spnego_blob);
    + inc_rfc1001_len(rsp, spnego_blob_len - 1);
    + }
    +
    + user = session_user(conn, req);
    + if (!user) {
    + ksmbd_debug(SMB, "Unknown user name or an error\n");
    + rsp->hdr.Status = STATUS_LOGON_FAILURE;
    + return -EINVAL;
    + }
    +
    + /* Check for previous session */
    + prev_id = le64_to_cpu(req->PreviousSessionId);
    + if (prev_id && prev_id != sess->id)
    + destroy_previous_session(user, prev_id);
    +
    + if (sess->state == SMB2_SESSION_VALID) {
    + /*
    + * Reuse session if anonymous try to connect
    + * on reauthetication.
    + */
    + if (ksmbd_anonymous_user(user)) {
    + ksmbd_free_user(user);
    + return 0;
    + }
    + ksmbd_free_user(sess->user);
    + }
    +
    + sess->user = user;
    + if (user_guest(sess->user)) {
    + if (conn->sign) {
    + ksmbd_debug(SMB, "Guest login not allowed when signing enabled\n");
    + rsp->hdr.Status = STATUS_LOGON_FAILURE;
    + return -EACCES;
    + }
    +
    + rsp->SessionFlags = SMB2_SESSION_FLAG_IS_GUEST_LE;
    + } else {
    + struct authenticate_message *authblob;
    +
    + authblob = user_authblob(conn, req);
    + sz = le16_to_cpu(req->SecurityBufferLength);
    + rc = ksmbd_decode_ntlmssp_auth_blob(authblob, sz, sess);
    + if (rc) {
    + set_user_flag(sess->user, KSMBD_USER_FLAG_BAD_PASSWORD);
    + ksmbd_debug(SMB, "authentication failed\n");
    + rsp->hdr.Status = STATUS_LOGON_FAILURE;
    + return -EINVAL;
    + }
    +
    + /*
    + * If session state is SMB2_SESSION_VALID, We can assume
    + * that it is reauthentication. And the user/password
    + * has been verified, so return it here.
    + */
    + if (sess->state == SMB2_SESSION_VALID)
    + return 0;
    +
    + if ((conn->sign || server_conf.enforced_signing) ||
    + (req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED))
    + sess->sign = true;
    +
    + if (conn->vals->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION &&
    + conn->ops->generate_encryptionkey) {
    + rc = conn->ops->generate_encryptionkey(sess);
    + if (rc) {
    + ksmbd_debug(SMB,
    + "SMB3 encryption key generation failed\n");
    + rsp->hdr.Status = STATUS_LOGON_FAILURE;
    + return rc;
    + }
    + sess->enc = true;
    + rsp->SessionFlags = SMB2_SESSION_FLAG_ENCRYPT_DATA_LE;
    + /*
    + * signing is disable if encryption is enable
    + * on this session
    + */
    + sess->sign = false;
    + }
    + }
    +
    + if (conn->dialect >= SMB30_PROT_ID) {
    + chann = lookup_chann_list(sess);
    + if (!chann) {
    + chann = kmalloc(sizeof(struct channel), GFP_KERNEL);
    + if (!chann)
    + return -ENOMEM;
    +
    + chann->conn = conn;
    + INIT_LIST_HEAD(&chann->chann_list);
    + list_add(&chann->chann_list, &sess->ksmbd_chann_list);
    + }
    + }
    +
    + if (conn->ops->generate_signingkey) {
    + rc = conn->ops->generate_signingkey(sess);
    + if (rc) {
    + ksmbd_debug(SMB, "SMB3 signing key generation failed\n");
    + rsp->hdr.Status = STATUS_LOGON_FAILURE;
    + return rc;
    + }
    + }
    +
    + if (conn->dialect > SMB20_PROT_ID) {
    + if (!ksmbd_conn_lookup_dialect(conn)) {
    + ksmbd_err("fail to verify the dialect\n");
    + rsp->hdr.Status = STATUS_USER_SESSION_DELETED;
    + return -EPERM;
    + }
    + }
    + return 0;
    +}
    +
    +#ifdef CONFIG_SMB_SERVER_KERBEROS5
    +static int krb5_authenticate(struct ksmbd_work *work)
    +{
    + struct smb2_sess_setup_req *req = work->request_buf;
    + struct smb2_sess_setup_rsp *rsp = work->response_buf;
    + struct ksmbd_conn *conn = work->conn;
    + struct ksmbd_session *sess = work->sess;
    + char *in_blob, *out_blob;
    + struct channel *chann = NULL;
    + u64 prev_sess_id;
    + int in_len, out_len;
    + int retval;
    +
    + in_blob = (char *)&req->hdr.ProtocolId +
    + le16_to_cpu(req->SecurityBufferOffset);
    + in_len = le16_to_cpu(req->SecurityBufferLength);
    + out_blob = (char *)&rsp->hdr.ProtocolId +
    + le16_to_cpu(rsp->SecurityBufferOffset);
    + out_len = work->response_sz -
    + offsetof(struct smb2_hdr, smb2_buf_length) -
    + le16_to_cpu(rsp->SecurityBufferOffset);
    +
    + /* Check previous session */
    + prev_sess_id = le64_to_cpu(req->PreviousSessionId);
    + if (prev_sess_id && prev_sess_id != sess->id)
    + destroy_previous_session(sess->user, prev_sess_id);
    +
    + if (sess->state == SMB2_SESSION_VALID)
    + ksmbd_free_user(sess->user);
    +
    + retval = ksmbd_krb5_authenticate(sess, in_blob, in_len,
    + out_blob, &out_len);
    + if (retval) {
    + ksmbd_debug(SMB, "krb5 authentication failed\n");
    + rsp->hdr.Status = STATUS_LOGON_FAILURE;
    + return retval;
    + }
    + rsp->SecurityBufferLength = cpu_to_le16(out_len);
    + inc_rfc1001_len(rsp, out_len - 1);
    +
    + if ((conn->sign || server_conf.enforced_signing) ||
    + (req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED))
    + sess->sign = true;
    +
    + if ((conn->vals->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION) &&
    + conn->ops->generate_encryptionkey) {
    + retval = conn->ops->generate_encryptionkey(sess);
    + if (retval) {
    + ksmbd_debug(SMB,
    + "SMB3 encryption key generation failed\n");
    + rsp->hdr.Status = STATUS_LOGON_FAILURE;
    + return retval;
    + }
    + sess->enc = true;
    + rsp->SessionFlags = SMB2_SESSION_FLAG_ENCRYPT_DATA_LE;
    + sess->sign = false;
    + }
    +
    + if (conn->dialect >= SMB30_PROT_ID) {
    + chann = lookup_chann_list(sess);
    + if (!chann) {
    + chann = kmalloc(sizeof(struct channel), GFP_KERNEL);
    + if (!chann)
    + return -ENOMEM;
    +
    + chann->conn = conn;
    + INIT_LIST_HEAD(&chann->chann_list);
    + list_add(&chann->chann_list, &sess->ksmbd_chann_list);
    + }
    + }
    +
    + if (conn->ops->generate_signingkey) {
    + retval = conn->ops->generate_signingkey(sess);
    + if (retval) {
    + ksmbd_debug(SMB, "SMB3 signing key generation failed\n");
    + rsp->hdr.Status = STATUS_LOGON_FAILURE;
    + return retval;
    + }
    + }
    +
    + if (conn->dialect > SMB20_PROT_ID) {
    + if (!ksmbd_conn_lookup_dialect(conn)) {
    + ksmbd_err("fail to verify the dialect\n");
    + rsp->hdr.Status = STATUS_USER_SESSION_DELETED;
    + return -EPERM;
    + }
    + }
    + return 0;
    +}
    +#else
    +static int krb5_authenticate(struct ksmbd_work *work)
    +{
    + return -EOPNOTSUPP;
    +}
    +#endif
    +
    +int smb2_sess_setup(struct ksmbd_work *work)
    +{
    + struct ksmbd_conn *conn = work->conn;
    + struct smb2_sess_setup_req *req = work->request_buf;
    + struct smb2_sess_setup_rsp *rsp = work->response_buf;
    + struct ksmbd_session *sess;
    + struct negotiate_message *negblob;
    + int rc = 0;
    +
    + ksmbd_debug(SMB, "Received request for session setup\n");
    +
    + rsp->StructureSize = cpu_to_le16(9);
    + rsp->SessionFlags = 0;
    + rsp->SecurityBufferOffset = cpu_to_le16(72);
    + rsp->SecurityBufferLength = 0;
    + inc_rfc1001_len(rsp, 9);
    +
    + if (!req->hdr.SessionId) {
    + sess = ksmbd_smb2_session_create();
    + if (!sess) {
    + rc = -ENOMEM;
    + goto out_err;
    + }
    + rsp->hdr.SessionId = cpu_to_le64(sess->id);
    + ksmbd_session_register(conn, sess);
    + } else {
    + sess = ksmbd_session_lookup(conn,
    + le64_to_cpu(req->hdr.SessionId));
    + if (!sess) {
    + rc = -ENOENT;
    + rsp->hdr.Status = STATUS_USER_SESSION_DELETED;
    + goto out_err;
    + }
    + }
    + work->sess = sess;
    +
    + if (sess->state == SMB2_SESSION_EXPIRED)
    + sess->state = SMB2_SESSION_IN_PROGRESS;
    +
    + negblob = (struct negotiate_message *)((char *)&req->hdr.ProtocolId +
    + le16_to_cpu(req->SecurityBufferOffset));
    +
    + if (decode_negotiation_token(work, negblob) == 0) {
    + if (conn->mechToken)
    + negblob = (struct negotiate_message *)conn->mechToken;
    + }
    +
    + if (server_conf.auth_mechs & conn->auth_mechs) {
    + if (conn->preferred_auth_mech &
    + (KSMBD_AUTH_KRB5 | KSMBD_AUTH_MSKRB5)) {
    + rc = generate_preauth_hash(work);
    + if (rc)
    + goto out_err;
    +
    + rc = krb5_authenticate(work);
    + if (rc) {
    + rsp->hdr.Status = STATUS_INVALID_PARAMETER;
    + goto out_err;
    + }
    +
    + ksmbd_conn_set_good(work);
    + sess->state = SMB2_SESSION_VALID;
    + kfree(sess->Preauth_HashValue);
    + sess->Preauth_HashValue = NULL;
    + } else if (conn->preferred_auth_mech == KSMBD_AUTH_NTLMSSP) {
    + rc = generate_preauth_hash(work);
    + if (rc)
    + goto out_err;
    +
    + if (negblob->MessageType == NtLmNegotiate) {
    + rc = ntlm_negotiate(work, negblob);
    + if (rc)
    + goto out_err;
    + rsp->hdr.Status =
    + STATUS_MORE_PROCESSING_REQUIRED;
    + /*
    + * Note: here total size -1 is done as an
    + * adjustment for 0 size blob
    + */
    + inc_rfc1001_len(rsp, le16_to_cpu(rsp->SecurityBufferLength) - 1);
    +
    + } else if (negblob->MessageType == NtLmAuthenticate) {
    + rc = ntlm_authenticate(work);
    + if (rc)
    + goto out_err;
    +
    + ksmbd_conn_set_good(work);
    + sess->state = SMB2_SESSION_VALID;
    + kfree(sess->Preauth_HashValue);
    + sess->Preauth_HashValue = NULL;
    + }
    + } else {
    + /* TODO: need one more negotiation */
    + ksmbd_err("Not support the preferred authentication\n");
    + rc = -EINVAL;
    + rsp->hdr.Status = STATUS_INVALID_PARAMETER;
    + }
    + } else {
    + ksmbd_err("Not support authentication\n");
    + rc = -EINVAL;
    + rsp->hdr.Status = STATUS_INVALID_PARAMETER;
    + }
    +
    +out_err:
    + if (conn->use_spnego && conn->mechToken) {
    + kfree(conn->mechToken);
    + conn->mechToken = NULL;
    + }
    +
    + if (rc < 0 && sess) {
    + ksmbd_session_destroy(sess);
    + work->sess = NULL;
    + }
    +
    + return rc;
    +}
    +
    +/**
    + * smb2_tree_connect() - handler for smb2 tree connect command
    + * @work: smb work containing smb request buffer
    + *
    + * Return: 0 on success, otherwise error
    + */
    +int smb2_tree_connect(struct ksmbd_work *work)
    +{
    + struct ksmbd_conn *conn = work->conn;
    + struct smb2_tree_connect_req *req = work->request_buf;
    + struct smb2_tree_connect_rsp *rsp = work->response_buf;
    + struct ksmbd_session *sess = work->sess;
    + char *treename = NULL, *name = NULL;
    + struct ksmbd_tree_conn_status status;
    + struct ksmbd_share_config *share;
    + int rc = -EINVAL;
    +
    + treename = smb_strndup_from_utf16(req->Buffer,
    + le16_to_cpu(req->PathLength), true,
    + conn->local_nls);
    + if (IS_ERR(treename)) {
    + ksmbd_err("treename is NULL\n");
    + status.ret = KSMBD_TREE_CONN_STATUS_ERROR;
    + goto out_err1;
    + }
    +
    + name = ksmbd_extract_sharename(treename);
    + if (IS_ERR(name)) {
    + status.ret = KSMBD_TREE_CONN_STATUS_ERROR;
    + goto out_err1;
    + }
    +
    + ksmbd_debug(SMB, "tree connect request for tree %s treename %s\n",
    + name, treename);
    +
    + status = ksmbd_tree_conn_connect(sess, name);
    + if (status.ret == KSMBD_TREE_CONN_STATUS_OK)
    + rsp->hdr.Id.SyncId.TreeId = cpu_to_le32(status.tree_conn->id);
    + else
    + goto out_err1;
    +
    + share = status.tree_conn->share_conf;
    + if (test_share_config_flag(share, KSMBD_SHARE_FLAG_PIPE)) {
    + ksmbd_debug(SMB, "IPC share path request\n");
    + rsp->ShareType = SMB2_SHARE_TYPE_PIPE;
    + rsp->MaximalAccess = FILE_READ_DATA_LE | FILE_READ_EA_LE |
    + FILE_EXECUTE_LE | FILE_READ_ATTRIBUTES_LE |
    + FILE_DELETE_LE | FILE_READ_CONTROL_LE |
    + FILE_WRITE_DAC_LE | FILE_WRITE_OWNER_LE |
    + FILE_SYNCHRONIZE_LE;
    + } else {
    + rsp->ShareType = SMB2_SHARE_TYPE_DISK;
    + rsp->MaximalAccess = FILE_READ_DATA_LE | FILE_READ_EA_LE |
    + FILE_EXECUTE_LE | FILE_READ_ATTRIBUTES_LE;
    + if (test_tree_conn_flag(status.tree_conn,
    + KSMBD_TREE_CONN_FLAG_WRITABLE)) {
    + rsp->MaximalAccess |= FILE_WRITE_DATA_LE |
    + FILE_APPEND_DATA_LE | FILE_WRITE_EA_LE |
    + FILE_DELETE_CHILD_LE | FILE_DELETE_LE |
    + FILE_WRITE_ATTRIBUTES_LE | FILE_DELETE_LE |
    + FILE_READ_CONTROL_LE | FILE_WRITE_DAC_LE |
    + FILE_WRITE_OWNER_LE | FILE_SYNCHRONIZE_LE;
    + }
    + }
    +
    + status.tree_conn->maximal_access = le32_to_cpu(rsp->MaximalAccess);
    + if (conn->posix_ext_supported)
    + status.tree_conn->posix_extensions = true;
    +
    +out_err1:
    + rsp->StructureSize = cpu_to_le16(16);
    + rsp->Capabilities = 0;
    + rsp->Reserved = 0;
    + /* default manual caching */
    + rsp->ShareFlags = SMB2_SHAREFLAG_MANUAL_CACHING;
    + inc_rfc1001_len(rsp, 16);
    +
    + if (!IS_ERR(treename))
    + kfree(treename);
    + if (!IS_ERR(name))
    + kfree(name);
    +
    + switch (status.ret) {
    + case KSMBD_TREE_CONN_STATUS_OK:
    + rsp->hdr.Status = STATUS_SUCCESS;
    + rc = 0;
    + break;
    + case KSMBD_TREE_CONN_STATUS_NO_SHARE:
    + rsp->hdr.Status = STATUS_BAD_NETWORK_PATH;
    + break;
    + case -ENOMEM:
    + case KSMBD_TREE_CONN_STATUS_NOMEM:
    + rsp->hdr.Status = STATUS_NO_MEMORY;
    + break;
    + case KSMBD_TREE_CONN_STATUS_ERROR:
    + case KSMBD_TREE_CONN_STATUS_TOO_MANY_CONNS:
    + case KSMBD_TREE_CONN_STATUS_TOO_MANY_SESSIONS:
    + rsp->hdr.Status = STATUS_ACCESS_DENIED;
    + break;
    + case -EINVAL:
    + rsp->hdr.Status = STATUS_INVALID_PARAMETER;
    + break;
    + default:
    + rsp->hdr.Status = STATUS_ACCESS_DENIED;
    + }
    +
    + return rc;
    +}
    +
    +/**
    + * smb2_create_open_flags() - convert smb open flags to unix open flags
    + * @file_present: is file already present
    + * @access: file access flags
    + * @disposition: file disposition flags
    + *
    + * Return: file open flags
    + */
    +static int smb2_create_open_flags(bool file_present, __le32 access,
    + __le32 disposition)
    +{
    + int oflags = O_NONBLOCK | O_LARGEFILE;
    +
    + if (access & FILE_READ_DESIRED_ACCESS_LE &&
    + access & FILE_WRITE_DESIRE_ACCESS_LE)
    + oflags |= O_RDWR;
    + else if (access & FILE_WRITE_DESIRE_ACCESS_LE)
    + oflags |= O_WRONLY;
    + else
    + oflags |= O_RDONLY;
    +
    + if (access == FILE_READ_ATTRIBUTES_LE)
    + oflags |= O_PATH;
    +
    + if (file_present) {
    + switch (disposition & FILE_CREATE_MASK_LE) {
    + case FILE_OPEN_LE:
    + case FILE_CREATE_LE:
    + break;
    + case FILE_SUPERSEDE_LE:
    + case FILE_OVERWRITE_LE:
    + case FILE_OVERWRITE_IF_LE:
    + oflags |= O_TRUNC;
    + break;
    + default:
    + break;
    + }
    + } else {
    + switch (disposition & FILE_CREATE_MASK_LE) {
    + case FILE_SUPERSEDE_LE:
    + case FILE_CREATE_LE:
    + case FILE_OPEN_IF_LE:
    + case FILE_OVERWRITE_IF_LE:
    + oflags |= O_CREAT;
    + break;
    + case FILE_OPEN_LE:
    + case FILE_OVERWRITE_LE:
    + oflags &= ~O_CREAT;
    + break;
    + default:
    + break;
    + }
    + }
    + return oflags;
    +}
    +
    +/**
    + * smb2_tree_disconnect() - handler for smb tree connect request
    + * @work: smb work containing request buffer
    + *
    + * Return: 0
    + */
    +int smb2_tree_disconnect(struct ksmbd_work *work)
    +{
    + struct smb2_tree_disconnect_rsp *rsp = work->response_buf;
    + struct ksmbd_session *sess = work->sess;
    + struct ksmbd_tree_connect *tcon = work->tcon;
    +
    + rsp->StructureSize = cpu_to_le16(4);
    + inc_rfc1001_len(rsp, 4);
    +
    + ksmbd_debug(SMB, "request\n");
    +
    + if (!tcon) {
    + struct smb2_tree_disconnect_req *req = work->request_buf;
    +
    + ksmbd_debug(SMB, "Invalid tid %d\n", req->hdr.Id.SyncId.TreeId);
    + rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
    + smb2_set_err_rsp(work);
    + return 0;
    + }
    +
    + ksmbd_close_tree_conn_fds(work);
    + ksmbd_tree_conn_disconnect(sess, tcon);
    + return 0;
    +}
    +
    +/**
    + * smb2_session_logoff() - handler for session log off request
    + * @work: smb work containing request buffer
    + *
    + * Return: 0
    + */
    +int smb2_session_logoff(struct ksmbd_work *work)
    +{
    + struct ksmbd_conn *conn = work->conn;
    + struct smb2_logoff_rsp *rsp = work->response_buf;
    + struct ksmbd_session *sess = work->sess;
    +
    + rsp->StructureSize = cpu_to_le16(4);
    + inc_rfc1001_len(rsp, 4);
    +
    + ksmbd_debug(SMB, "request\n");
    +
    + /* Got a valid session, set connection state */
    + WARN_ON(sess->conn != conn);
    +
    + /* setting CifsExiting here may race with start_tcp_sess */
    + ksmbd_conn_set_need_reconnect(work);
    + ksmbd_close_session_fds(work);
    + ksmbd_conn_wait_idle(conn);
    +
    + if (ksmbd_tree_conn_session_logoff(sess)) {
    + struct smb2_logoff_req *req = work->request_buf;
    +
    + ksmbd_debug(SMB, "Invalid tid %d\n", req->hdr.Id.SyncId.TreeId);
    + rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
    + smb2_set_err_rsp(work);
    + return 0;
    + }
    +
    + ksmbd_destroy_file_table(&sess->file_table);
    + sess->state = SMB2_SESSION_EXPIRED;
    +
    + ksmbd_free_user(sess->user);
    + sess->user = NULL;
    +
    + /* let start_tcp_sess free connection info now */
    + ksmbd_conn_set_need_negotiate(work);
    + return 0;
    +}
    +
    +/**
    + * create_smb2_pipe() - create IPC pipe
    + * @work: smb work containing request buffer
    + *
    + * Return: 0 on success, otherwise error
    + */
    +static noinline int create_smb2_pipe(struct ksmbd_work *work)
    +{
    + struct smb2_create_rsp *rsp = work->response_buf;
    + struct smb2_create_req *req = work->request_buf;
    + int id;
    + int err;
    + char *name;
    +
    + name = smb_strndup_from_utf16(req->Buffer, le16_to_cpu(req->NameLength),
    + 1, work->conn->local_nls);
    + if (IS_ERR(name)) {
    + rsp->hdr.Status = STATUS_NO_MEMORY;
    + err = PTR_ERR(name);
    + goto out;
    + }
    +
    + id = ksmbd_session_rpc_open(work->sess, name);
    + if (id < 0) {
    + ksmbd_err("Unable to open RPC pipe: %d\n", id);
    + err = id;
    + goto out;
    + }
    +
    + rsp->hdr.Status = STATUS_SUCCESS;
    + rsp->StructureSize = cpu_to_le16(89);
    + rsp->OplockLevel = SMB2_OPLOCK_LEVEL_NONE;
    + rsp->Reserved = 0;
    + rsp->CreateAction = cpu_to_le32(FILE_OPENED);
    +
    + rsp->CreationTime = cpu_to_le64(0);
    + rsp->LastAccessTime = cpu_to_le64(0);
    + rsp->ChangeTime = cpu_to_le64(0);
    + rsp->AllocationSize = cpu_to_le64(0);
    + rsp->EndofFile = cpu_to_le64(0);
    + rsp->FileAttributes = ATTR_NORMAL_LE;
    + rsp->Reserved2 = 0;
    + rsp->VolatileFileId = cpu_to_le64(id);
    + rsp->PersistentFileId = 0;
    + rsp->CreateContextsOffset = 0;
    + rsp->CreateContextsLength = 0;
    +
    + inc_rfc1001_len(rsp, 88); /* StructureSize - 1*/
    + kfree(name);
    + return 0;
    +
    +out:
    + switch (err) {
    + case -EINVAL:
    + rsp->hdr.Status = STATUS_INVALID_PARAMETER;
    + break;
    + case -ENOSPC:
    + case -ENOMEM:
    + rsp->hdr.Status = STATUS_NO_MEMORY;
    + break;
    + }
    +
    + if (!IS_ERR(name))
    + kfree(name);
    +
    + smb2_set_err_rsp(work);
    + return err;
    +}
    +
    +/**
    + * smb2_set_ea() - handler for setting extended attributes using set
    + * info command
    + * @eabuf: set info command buffer
    + * @path: dentry path for get ea
    + *
    + * Return: 0 on success, otherwise error
    + */
    +static int smb2_set_ea(struct smb2_ea_info *eabuf, struct path *path)
    +{
    + char *attr_name = NULL, *value;
    + int rc = 0;
    + int next = 0;
    +
    + attr_name = kmalloc(XATTR_NAME_MAX + 1, GFP_KERNEL);
    + if (!attr_name)
    + return -ENOMEM;
    +
    + do {
    + if (!eabuf->EaNameLength)
    + goto next;
    +
    + ksmbd_debug(SMB,
    + "name : <%s>, name_len : %u, value_len : %u, next : %u\n",
    + eabuf->name, eabuf->EaNameLength,
    + le16_to_cpu(eabuf->EaValueLength),
    + le32_to_cpu(eabuf->NextEntryOffset));
    +
    + if (eabuf->EaNameLength >
    + (XATTR_NAME_MAX - XATTR_USER_PREFIX_LEN)) {
    + rc = -EINVAL;
    + break;
    + }
    +
    + memcpy(attr_name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN);
    + memcpy(&attr_name[XATTR_USER_PREFIX_LEN], eabuf->name,
    + eabuf->EaNameLength);
    + attr_name[XATTR_USER_PREFIX_LEN + eabuf->EaNameLength] = '\0';
    + value = (char *)&eabuf->name + eabuf->EaNameLength + 1;
    +
    + if (!eabuf->EaValueLength) {
    + rc = ksmbd_vfs_casexattr_len(path->dentry,
    + attr_name,
    + XATTR_USER_PREFIX_LEN +
    + eabuf->EaNameLength);
    +
    + /* delete the EA only when it exits */
    + if (rc > 0) {
    + rc = ksmbd_vfs_remove_xattr(path->dentry,
    + attr_name);
    +
    + if (rc < 0) {
    + ksmbd_debug(SMB,
    + "remove xattr failed(%d)\n",
    + rc);
    + break;
    + }
    + }
    +
    + /* if the EA doesn't exist, just do nothing. */
    + rc = 0;
    + } else {
    + rc = ksmbd_vfs_setxattr(path->dentry, attr_name, value,
    + le16_to_cpu(eabuf->EaValueLength), 0);
    + if (rc < 0) {
    + ksmbd_debug(SMB,
    + "ksmbd_vfs_setxattr is failed(%d)\n",
    + rc);
    + break;
    + }
    + }
    +
    +next:
    + next = le32_to_cpu(eabuf->NextEntryOffset);
    + eabuf = (struct smb2_ea_info *)((char *)eabuf + next);
    + } while (next != 0);
    +
    + kfree(attr_name);
    + return rc;
    +}
    +
    +static inline int check_context_err(void *ctx, char *str)
    +{
    + int err;
    +
    + err = PTR_ERR(ctx);
    + ksmbd_debug(SMB, "find context %s err %d\n", str, err);
    +
    + if (err == -EINVAL) {
    + ksmbd_err("bad name length\n");
    + return err;
    + }
    +
    + return 0;
    +}
    +
    +static noinline int smb2_set_stream_name_xattr(struct path *path,
    + struct ksmbd_file *fp,
    + char *stream_name, int s_type)
    +{
    + size_t xattr_stream_size;
    + char *xattr_stream_name;
    + int rc;
    +
    + rc = ksmbd_vfs_xattr_stream_name(stream_name,
    + &xattr_stream_name,
    + &xattr_stream_size,
    + s_type);
    + if (rc)
    + return rc;
    +
    + fp->stream.name = xattr_stream_name;
    + fp->stream.size = xattr_stream_size;
    +
    + /* Check if there is stream prefix in xattr space */
    + rc = ksmbd_vfs_casexattr_len(path->dentry,
    + xattr_stream_name,
    + xattr_stream_size);
    + if (rc >= 0)
    + return 0;
    +
    + if (fp->cdoption == FILE_OPEN_LE) {
    + ksmbd_debug(SMB, "XATTR stream name lookup failed: %d\n", rc);
    + return -EBADF;
    + }
    +
    + rc = ksmbd_vfs_setxattr(path->dentry, xattr_stream_name, NULL, 0, 0);
    + if (rc < 0)
    + ksmbd_err("Failed to store XATTR stream name :%d\n", rc);
    + return 0;
    +}
    +
    +static int smb2_remove_smb_xattrs(struct dentry *dentry)
    +{
    + char *name, *xattr_list = NULL;
    + ssize_t xattr_list_len;
    + int err = 0;
    +
    + xattr_list_len = ksmbd_vfs_listxattr(dentry, &xattr_list);
    + if (xattr_list_len < 0) {
    + goto out;
    + } else if (!xattr_list_len) {
    + ksmbd_debug(SMB, "empty xattr in the file\n");
    + goto out;
    + }
    +
    + for (name = xattr_list; name - xattr_list < xattr_list_len;
    + name += strlen(name) + 1) {
    + ksmbd_debug(SMB, "%s, len %zd\n", name, strlen(name));
    +
    + if (strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN) &&
    + strncmp(&name[XATTR_USER_PREFIX_LEN], DOS_ATTRIBUTE_PREFIX,
    + DOS_ATTRIBUTE_PREFIX_LEN) &&
    + strncmp(&name[XATTR_USER_PREFIX_LEN], STREAM_PREFIX, STREAM_PREFIX_LEN))
    + continue;
    +
    + err = ksmbd_vfs_remove_xattr(dentry, name);
    + if (err)
    + ksmbd_debug(SMB, "remove xattr failed : %s\n", name);
    + }
    +out:
    + kvfree(xattr_list);
    + return err;
    +}
    +
    +static int smb2_create_truncate(struct path *path)
    +{
    + int rc = vfs_truncate(path, 0);
    +
    + if (rc) {
    + ksmbd_err("vfs_truncate failed, rc %d\n", rc);
    + return rc;
    + }
    +
    + rc = smb2_remove_smb_xattrs(path->dentry);
    + if (rc == -EOPNOTSUPP)
    + rc = 0;
    + if (rc)
    + ksmbd_debug(SMB,
    + "ksmbd_truncate_stream_name_xattr failed, rc %d\n",
    + rc);
    + return rc;
    +}
    +
    +static void smb2_new_xattrs(struct ksmbd_tree_connect *tcon, struct path *path,
    + struct ksmbd_file *fp)
    +{
    + struct xattr_dos_attrib da = {0};
    + int rc;
    +
    + if (!test_share_config_flag(tcon->share_conf,
    + KSMBD_SHARE_FLAG_STORE_DOS_ATTRS))
    + return;
    +
    + da.version = 4;
    + da.attr = le32_to_cpu(fp->f_ci->m_fattr);
    + da.itime = da.create_time = fp->create_time;
    + da.flags = XATTR_DOSINFO_ATTRIB | XATTR_DOSINFO_CREATE_TIME |
    + XATTR_DOSINFO_ITIME;
    +
    + rc = ksmbd_vfs_set_dos_attrib_xattr(path->dentry, &da);
    + if (rc)
    + ksmbd_debug(SMB, "failed to store file attribute into xattr\n");
    +}
    +
    +static void smb2_update_xattrs(struct ksmbd_tree_connect *tcon,
    + struct path *path, struct ksmbd_file *fp)
    +{
    + struct xattr_dos_attrib da;
    + int rc;
    +
    + fp->f_ci->m_fattr &= ~(ATTR_HIDDEN_LE | ATTR_SYSTEM_LE);
    +
    + /* get FileAttributes from XATTR_NAME_DOS_ATTRIBUTE */
    + if (!test_share_config_flag(tcon->share_conf,
    + KSMBD_SHARE_FLAG_STORE_DOS_ATTRS))
    + return;
    +
    + rc = ksmbd_vfs_get_dos_attrib_xattr(path->dentry, &da);
    + if (rc > 0) {
    + fp->f_ci->m_fattr = cpu_to_le32(da.attr);
    + fp->create_time = da.create_time;
    + fp->itime = da.itime;
    + }
    +}
    +
    +static int smb2_creat(struct ksmbd_work *work, struct path *path, char *name,
    + int open_flags, umode_t posix_mode, bool is_dir)
    +{
    + struct ksmbd_tree_connect *tcon = work->tcon;
    + struct ksmbd_share_config *share = tcon->share_conf;
    + umode_t mode;
    + int rc;
    +
    + if (!(open_flags & O_CREAT))
    + return -EBADF;
    +
    + ksmbd_debug(SMB, "file does not exist, so creating\n");
    + if (is_dir == true) {
    + ksmbd_debug(SMB, "creating directory\n");
    +
    + mode = share_config_directory_mode(share, posix_mode);
    + rc = ksmbd_vfs_mkdir(work, name, mode);
    + if (rc)
    + return rc;
    + } else {
    + ksmbd_debug(SMB, "creating regular file\n");
    +
    + mode = share_config_create_mode(share, posix_mode);
    + rc = ksmbd_vfs_create(work, name, mode);
    + if (rc)
    + return rc;
    + }
    +
    + rc = ksmbd_vfs_kern_path(name, 0, path, 0);
    + if (rc) {
    + ksmbd_err("cannot get linux path (%s), err = %d\n",
    + name, rc);
    + return rc;
    + }
    + return 0;
    +}
    +
    +static int smb2_create_sd_buffer(struct ksmbd_work *work,
    + struct smb2_create_req *req,
    + struct dentry *dentry)
    +{
    + struct create_context *context;
    + int rc = -ENOENT;
    +
    + if (!req->CreateContextsOffset)
    + return rc;
    +
    + /* Parse SD BUFFER create contexts */
    + context = smb2_find_context_vals(req, SMB2_CREATE_SD_BUFFER);
    + if (context && !IS_ERR(context)) {
    + struct create_sd_buf_req *sd_buf;
    +
    + ksmbd_debug(SMB,
    + "Set ACLs using SMB2_CREATE_SD_BUFFER context\n");
    + sd_buf = (struct create_sd_buf_req *)context;
    + rc = set_info_sec(work->conn, work->tcon, dentry, &sd_buf->ntsd,
    + le32_to_cpu(sd_buf->ccontext.DataLength), true);
    + }
    +
    + return rc;
    +}
    +
    +static void ksmbd_acls_fattr(struct smb_fattr *fattr, struct inode *inode)
    +{
    + fattr->cf_uid = inode->i_uid;
    + fattr->cf_gid = inode->i_gid;
    + fattr->cf_mode = inode->i_mode;
    + fattr->cf_dacls = NULL;
    +
    + fattr->cf_acls = ksmbd_vfs_get_acl(inode, ACL_TYPE_ACCESS);
    + if (S_ISDIR(inode->i_mode))
    + fattr->cf_dacls = ksmbd_vfs_get_acl(inode, ACL_TYPE_DEFAULT);
    +}
    +
    +/**
    + * smb2_open() - handler for smb file open request
    + * @work: smb work containing request buffer
    + *
    + * Return: 0 on success, otherwise error
    + */
    +int smb2_open(struct ksmbd_work *work)
    +{
    + struct ksmbd_conn *conn = work->conn;
    + struct ksmbd_session *sess = work->sess;
    + struct ksmbd_tree_connect *tcon = work->tcon;
    + struct smb2_create_req *req;
    + struct smb2_create_rsp *rsp, *rsp_org;
    + struct path path;
    + struct ksmbd_share_config *share = tcon->share_conf;
    + struct ksmbd_file *fp = NULL;
    + struct file *filp = NULL;
    + struct kstat stat;
    + struct create_context *context;
    + struct lease_ctx_info *lc = NULL;
    + struct create_ea_buf_req *ea_buf = NULL;
    + struct oplock_info *opinfo;
    + __le32 *next_ptr = NULL;
    + int req_op_level = 0, open_flags = 0, file_info = 0;
    + int rc = 0, len = 0;
    + int contxt_cnt = 0, query_disk_id = 0;
    + int maximal_access_ctxt = 0, posix_ctxt = 0;
    + int s_type = 0;
    + int next_off = 0;
    + char *name = NULL;
    + char *stream_name = NULL;
    + bool file_present = false, created = false, already_permitted = false;
    + int share_ret, need_truncate = 0;
    + u64 time;
    + umode_t posix_mode = 0;
    + __le32 daccess, maximal_access = 0;
    +
    + rsp_org = work->response_buf;
    + WORK_BUFFERS(work, req, rsp);
    +
    + if (req->hdr.NextCommand && !work->next_smb2_rcv_hdr_off &&
    + (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)) {
    + ksmbd_debug(SMB, "invalid flag in chained command\n");
    + rsp->hdr.Status = STATUS_INVALID_PARAMETER;
    + smb2_set_err_rsp(work);
    + return -EINVAL;
    + }
    +
    + if (test_share_config_flag(share, KSMBD_SHARE_FLAG_PIPE)) {
    + ksmbd_debug(SMB, "IPC pipe create request\n");
    + return create_smb2_pipe(work);
    + }
    +
    + if (req->NameLength) {
    + if ((req->CreateOptions & FILE_DIRECTORY_FILE_LE) &&
    + *(char *)req->Buffer == '\\') {
    + ksmbd_err("not allow directory name included leading slash\n");
    + rc = -EINVAL;
    + goto err_out1;
    + }
    +
    + name = smb2_get_name(share,
    + req->Buffer,
    + le16_to_cpu(req->NameLength),
    + work->conn->local_nls);
    + if (IS_ERR(name)) {
    + rc = PTR_ERR(name);
    + if (rc != -ENOMEM)
    + rc = -ENOENT;
    + goto err_out1;
    + }
    +
    + ksmbd_debug(SMB, "converted name = %s\n", name);
    + if (strchr(name, ':')) {
    + if (!test_share_config_flag(work->tcon->share_conf,
    + KSMBD_SHARE_FLAG_STREAMS)) {
    + rc = -EBADF;
    + goto err_out1;
    + }
    + rc = parse_stream_name(name, &stream_name, &s_type);
    + if (rc < 0)
    + goto err_out1;
    + }
    +
    + rc = ksmbd_validate_filename(name);
    + if (rc < 0)
    + goto err_out1;
    +
    + if (ksmbd_share_veto_filename(share, name)) {
    + rc = -ENOENT;
    + ksmbd_debug(SMB, "Reject open(), vetoed file: %s\n",
    + name);
    + goto err_out1;
    + }
    + } else {
    + len = strlen(share->path);
    + ksmbd_debug(SMB, "share path len %d\n", len);
    + name = kmalloc(len + 1, GFP_KERNEL);
    + if (!name) {
    + rsp->hdr.Status = STATUS_NO_MEMORY;
    + rc = -ENOMEM;
    + goto err_out1;
    + }
    +
    + memcpy(name, share->path, len);
    + *(name + len) = '\0';
    + }
    +
    + req_op_level = req->RequestedOplockLevel;
    + if (req_op_level == SMB2_OPLOCK_LEVEL_LEASE)
    + lc = parse_lease_state(req);
    +
    + if (le32_to_cpu(req->ImpersonationLevel) > le32_to_cpu(IL_DELEGATE_LE)) {
    + ksmbd_err("Invalid impersonationlevel : 0x%x\n",
    + le32_to_cpu(req->ImpersonationLevel));
    + rc = -EIO;
    + rsp->hdr.Status = STATUS_BAD_IMPERSONATION_LEVEL;
    + goto err_out1;
    + }
    +
    + if (req->CreateOptions && !(req->CreateOptions & CREATE_OPTIONS_MASK)) {
    + ksmbd_err("Invalid create options : 0x%x\n",
    + le32_to_cpu(req->CreateOptions));
    + rc = -EINVAL;
    + goto err_out1;
    + } else {
    + if (req->CreateOptions & FILE_SEQUENTIAL_ONLY_LE &&
    + req->CreateOptions & FILE_RANDOM_ACCESS_LE)
    + req->CreateOptions = ~(FILE_SEQUENTIAL_ONLY_LE);
    +
    + if (req->CreateOptions &
    + (FILE_OPEN_BY_FILE_ID_LE | CREATE_TREE_CONNECTION |
    + FILE_RESERVE_OPFILTER_LE)) {
    + rc = -EOPNOTSUPP;
    + goto err_out1;
    + }
    +
    + if (req->CreateOptions & FILE_DIRECTORY_FILE_LE) {
    + if (req->CreateOptions & FILE_NON_DIRECTORY_FILE_LE) {
    + rc = -EINVAL;
    + goto err_out1;
    + } else if (req->CreateOptions & FILE_NO_COMPRESSION_LE) {
    + req->CreateOptions = ~(FILE_NO_COMPRESSION_LE);
    + }
    + }
    + }
    +
    + if (le32_to_cpu(req->CreateDisposition) >
    + le32_to_cpu(FILE_OVERWRITE_IF_LE)) {
    + ksmbd_err("Invalid create disposition : 0x%x\n",
    + le32_to_cpu(req->CreateDisposition));
    + rc = -EINVAL;
    + goto err_out1;
    + }
    +
    + if (!(req->DesiredAccess & DESIRED_ACCESS_MASK)) {
    + ksmbd_err("Invalid desired access : 0x%x\n",
    + le32_to_cpu(req->DesiredAccess));
    + rc = -EACCES;
    + goto err_out1;
    + }
    +
    + if (req->FileAttributes && !(req->FileAttributes & ATTR_MASK_LE)) {
    + ksmbd_err("Invalid file attribute : 0x%x\n",
    + le32_to_cpu(req->FileAttributes));
    + rc = -EINVAL;
    + goto err_out1;
    + }
    +
    + if (req->CreateContextsOffset) {
    + /* Parse non-durable handle create contexts */
    + context = smb2_find_context_vals(req, SMB2_CREATE_EA_BUFFER);
    + if (IS_ERR(context)) {
    + rc = check_context_err(context, SMB2_CREATE_EA_BUFFER);
    + if (rc < 0)
    + goto err_out1;
    + } else {
    + ea_buf = (struct create_ea_buf_req *)context;
    + if (req->CreateOptions & FILE_NO_EA_KNOWLEDGE_LE) {
    + rsp->hdr.Status = STATUS_ACCESS_DENIED;
    + rc = -EACCES;
    + goto err_out1;
    + }
    + }
    +
    + context = smb2_find_context_vals(req,
    + SMB2_CREATE_QUERY_MAXIMAL_ACCESS_REQUEST);
    + if (IS_ERR(context)) {
    + rc = check_context_err(context,
    + SMB2_CREATE_QUERY_MAXIMAL_ACCESS_REQUEST);
    + if (rc < 0)
    + goto err_out1;
    + } else {
    + ksmbd_debug(SMB,
    + "get query maximal access context\n");
    + maximal_access_ctxt = 1;
    + }
    +
    + context = smb2_find_context_vals(req,
    + SMB2_CREATE_TIMEWARP_REQUEST);
    + if (IS_ERR(context)) {
    + rc = check_context_err(context,
    + SMB2_CREATE_TIMEWARP_REQUEST);
    + if (rc < 0)
    + goto err_out1;
    + } else {
    + ksmbd_debug(SMB, "get timewarp context\n");
    + rc = -EBADF;
    + goto err_out1;
    + }
    +
    + if (tcon->posix_extensions) {
    + context = smb2_find_context_vals(req,
    + SMB2_CREATE_TAG_POSIX);
    + if (IS_ERR(context)) {
    + rc = check_context_err(context,
    + SMB2_CREATE_TAG_POSIX);
    + if (rc < 0)
    + goto err_out1;
    + } else {
    + struct create_posix *posix =
    + (struct create_posix *)context;
    + ksmbd_debug(SMB, "get posix context\n");
    +
    + posix_mode = le32_to_cpu(posix->Mode);
    + posix_ctxt = 1;
    + }
    + }
    + }
    +
    + if (ksmbd_override_fsids(work)) {
    + rc = -ENOMEM;
    + goto err_out1;
    + }
    +
    + if (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE) {
    + /*
    + * On delete request, instead of following up, need to
    + * look the current entity
    + */
    + rc = ksmbd_vfs_kern_path(name, 0, &path, 1);
    + if (!rc) {
    + /*
    + * If file exists with under flags, return access
    + * denied error.
    + */
    + if (req->CreateDisposition == FILE_OVERWRITE_IF_LE ||
    + req->CreateDisposition == FILE_OPEN_IF_LE) {
    + rc = -EACCES;
    + path_put(&path);
    + goto err_out;
    + }
    +
    + if (!test_tree_conn_flag(tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
    + ksmbd_debug(SMB,
    + "User does not have write permission\n");
    + rc = -EACCES;
    + path_put(&path);
    + goto err_out;
    + }
    + }
    + } else {
    + if (test_share_config_flag(work->tcon->share_conf,
    + KSMBD_SHARE_FLAG_FOLLOW_SYMLINKS)) {
    + /*
    + * Use LOOKUP_FOLLOW to follow the path of
    + * symlink in path buildup
    + */
    + rc = ksmbd_vfs_kern_path(name, LOOKUP_FOLLOW, &path, 1);
    + if (rc) { /* Case for broken link ?*/
    + rc = ksmbd_vfs_kern_path(name, 0, &path, 1);
    + }
    + } else {
    + rc = ksmbd_vfs_kern_path(name, 0, &path, 1);
    + if (!rc && d_is_symlink(path.dentry)) {
    + rc = -EACCES;
    + path_put(&path);
    + goto err_out;
    + }
    + }
    + }
    +
    + if (rc) {
    + if (rc == -EACCES) {
    + ksmbd_debug(SMB,
    + "User does not have right permission\n");
    + goto err_out;
    + }
    + ksmbd_debug(SMB, "can not get linux path for %s, rc = %d\n",
    + name, rc);
    + rc = 0;
    + } else {
    + file_present = true;
    + generic_fillattr(&init_user_ns, d_inode(path.dentry), &stat);
    + }
    + if (stream_name) {
    + if (req->CreateOptions & FILE_DIRECTORY_FILE_LE) {
    + if (s_type == DATA_STREAM) {
    + rc = -EIO;
    + rsp->hdr.Status = STATUS_NOT_A_DIRECTORY;
    + }
    + } else {
    + if (S_ISDIR(stat.mode) && s_type == DATA_STREAM) {
    + rc = -EIO;
    + rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY;
    + }
    + }
    +
    + if (req->CreateOptions & FILE_DIRECTORY_FILE_LE &&
    + req->FileAttributes & ATTR_NORMAL_LE) {
    + rsp->hdr.Status = STATUS_NOT_A_DIRECTORY;
    + rc = -EIO;
    + }
    +
    + if (rc < 0)
    + goto err_out;
    + }
    +
    + if (file_present && req->CreateOptions & FILE_NON_DIRECTORY_FILE_LE &&
    + S_ISDIR(stat.mode) && !(req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) {
    + ksmbd_debug(SMB, "open() argument is a directory: %s, %x\n",
    + name, req->CreateOptions);
    + rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY;
    + rc = -EIO;
    + goto err_out;
    + }
    +
    + if (file_present && (req->CreateOptions & FILE_DIRECTORY_FILE_LE) &&
    + !(req->CreateDisposition == FILE_CREATE_LE) &&
    + !S_ISDIR(stat.mode)) {
    + rsp->hdr.Status = STATUS_NOT_A_DIRECTORY;
    + rc = -EIO;
    + goto err_out;
    + }
    +
    + if (!stream_name && file_present &&
    + req->CreateDisposition == FILE_CREATE_LE) {
    + rc = -EEXIST;
    + goto err_out;
    + }
    +
    + daccess = smb_map_generic_desired_access(req->DesiredAccess);
    +
    + if (file_present && !(req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) {
    + rc = smb_check_perm_dacl(conn, path.dentry, &daccess,
    + sess->user->uid);
    + if (rc)
    + goto err_out;
    + }
    +
    + if (daccess & FILE_MAXIMAL_ACCESS_LE) {
    + if (!file_present) {
    + daccess = cpu_to_le32(GENERIC_ALL_FLAGS);
    + } else {
    + rc = ksmbd_vfs_query_maximal_access(path.dentry,
    + &daccess);
    + if (rc)
    + goto err_out;
    + already_permitted = true;
    + }
    + maximal_access = daccess;
    + }
    +
    + open_flags = smb2_create_open_flags(file_present, daccess,
    + req->CreateDisposition);
    +
    + if (!test_tree_conn_flag(tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
    + if (open_flags & O_CREAT) {
    + ksmbd_debug(SMB,
    + "User does not have write permission\n");
    + rc = -EACCES;
    + goto err_out;
    + }
    + }
    +
    + /*create file if not present */
    + if (!file_present) {
    + rc = smb2_creat(work, &path, name, open_flags, posix_mode,
    + req->CreateOptions & FILE_DIRECTORY_FILE_LE);
    + if (rc)
    + goto err_out;
    +
    + created = true;
    + if (ea_buf) {
    + rc = smb2_set_ea(&ea_buf->ea, &path);
    + if (rc == -EOPNOTSUPP)
    + rc = 0;
    + else if (rc)
    + goto err_out;
    + }
    + } else if (!already_permitted) {
    + bool may_delete;
    +
    + may_delete = daccess & FILE_DELETE_LE ||
    + req->CreateOptions & FILE_DELETE_ON_CLOSE_LE;
    +
    + /* FILE_READ_ATTRIBUTE is allowed without inode_permission,
    + * because execute(search) permission on a parent directory,
    + * is already granted.
    + */
    + if (daccess & ~(FILE_READ_ATTRIBUTES_LE | FILE_READ_CONTROL_LE)) {
    + rc = ksmbd_vfs_inode_permission(path.dentry,
    + open_flags & O_ACCMODE,
    + may_delete);
    + if (rc)
    + goto err_out;
    + }
    + }
    +
    + rc = ksmbd_query_inode_status(d_inode(path.dentry->d_parent));
    + if (rc == KSMBD_INODE_STATUS_PENDING_DELETE) {
    + rc = -EBUSY;
    + goto err_out;
    + }
    +
    + rc = 0;
    + filp = dentry_open(&path, open_flags, current_cred());
    + if (IS_ERR(filp)) {
    + rc = PTR_ERR(filp);
    + ksmbd_err("dentry open for dir failed, rc %d\n", rc);
    + goto err_out;
    + }
    +
    + if (file_present) {
    + if (!(open_flags & O_TRUNC))
    + file_info = FILE_OPENED;
    + else
    + file_info = FILE_OVERWRITTEN;
    +
    + if ((req->CreateDisposition & FILE_CREATE_MASK_LE) ==
    + FILE_SUPERSEDE_LE)
    + file_info = FILE_SUPERSEDED;
    + } else if (open_flags & O_CREAT) {
    + file_info = FILE_CREATED;
    + }
    +
    + ksmbd_vfs_set_fadvise(filp, req->CreateOptions);
    +
    + /* Obtain Volatile-ID */
    + fp = ksmbd_open_fd(work, filp);
    + if (IS_ERR(fp)) {
    + fput(filp);
    + rc = PTR_ERR(fp);
    + fp = NULL;
    + goto err_out;
    + }
    +
    + /* Get Persistent-ID */
    + ksmbd_open_durable_fd(fp);
    + if (!HAS_FILE_ID(fp->persistent_id)) {
    + rc = -ENOMEM;
    + goto err_out;
    + }
    +
    + fp->filename = name;
    + fp->cdoption = req->CreateDisposition;
    + fp->daccess = daccess;
    + fp->saccess = req->ShareAccess;
    + fp->coption = req->CreateOptions;
    +
    + /* Set default windows and posix acls if creating new file */
    + if (created) {
    + int posix_acl_rc;
    + struct inode *inode = d_inode(path.dentry);
    +
    + posix_acl_rc = ksmbd_vfs_inherit_posix_acl(inode, d_inode(path.dentry->d_parent));
    + if (posix_acl_rc)
    + ksmbd_debug(SMB, "inherit posix acl failed : %d\n", posix_acl_rc);
    +
    + if (test_share_config_flag(work->tcon->share_conf,
    + KSMBD_SHARE_FLAG_ACL_XATTR)) {
    + rc = smb_inherit_dacl(conn, path.dentry, sess->user->uid,
    + sess->user->gid);
    + }
    +
    + if (rc) {
    + rc = smb2_create_sd_buffer(work, req, path.dentry);
    + if (rc) {
    + if (posix_acl_rc)
    + ksmbd_vfs_set_init_posix_acl(inode);
    +
    + if (test_share_config_flag(work->tcon->share_conf,
    + KSMBD_SHARE_FLAG_ACL_XATTR)) {
    + struct smb_fattr fattr;
    + struct smb_ntsd *pntsd;
    + int pntsd_size, ace_num = 0;
    +
    + ksmbd_acls_fattr(&fattr, inode);
    + if (fattr.cf_acls)
    + ace_num = fattr.cf_acls->a_count;
    + if (fattr.cf_dacls)
    + ace_num += fattr.cf_dacls->a_count;
    +
    + pntsd = kmalloc(sizeof(struct smb_ntsd) +
    + sizeof(struct smb_sid) * 3 +
    + sizeof(struct smb_acl) +
    + sizeof(struct smb_ace) * ace_num * 2,
    + GFP_KERNEL);
    + if (!pntsd)
    + goto err_out;
    +
    + rc = build_sec_desc(pntsd, NULL,
    + OWNER_SECINFO |
    + GROUP_SECINFO |
    + DACL_SECINFO,
    + &pntsd_size, &fattr);
    + posix_acl_release(fattr.cf_acls);
    + posix_acl_release(fattr.cf_dacls);
    +
    + rc = ksmbd_vfs_set_sd_xattr(conn,
    + path.dentry,
    + pntsd,
    + pntsd_size);
    + kfree(pntsd);
    + if (rc)
    + ksmbd_err("failed to store ntacl in xattr : %d\n",
    + rc);
    + }
    + }
    + }
    + rc = 0;
    + }
    +
    + if (stream_name) {
    + rc = smb2_set_stream_name_xattr(&path,
    + fp,
    + stream_name,
    + s_type);
    + if (rc)
    + goto err_out;
    + file_info = FILE_CREATED;
    + }
    +
    + fp->attrib_only = !(req->DesiredAccess & ~(FILE_READ_ATTRIBUTES_LE |
    + FILE_WRITE_ATTRIBUTES_LE | FILE_SYNCHRONIZE_LE));
    + if (!S_ISDIR(file_inode(filp)->i_mode) && open_flags & O_TRUNC &&
    + !fp->attrib_only && !stream_name) {
    + smb_break_all_oplock(work, fp);
    + need_truncate = 1;
    + }
    +
    + /* fp should be searchable through ksmbd_inode.m_fp_list
    + * after daccess, saccess, attrib_only, and stream are
    + * initialized.
    + */
    + write_lock(&fp->f_ci->m_lock);
    + list_add(&fp->node, &fp->f_ci->m_fp_list);
    + write_unlock(&fp->f_ci->m_lock);
    +
    + rc = ksmbd_vfs_getattr(&path, &stat);
    + if (rc) {
    + generic_fillattr(&init_user_ns, d_inode(path.dentry), &stat);
    + rc = 0;
    + }
    +
    + /* Check delete pending among previous fp before oplock break */
    + if (ksmbd_inode_pending_delete(fp)) {
    + rc = -EBUSY;
    + goto err_out;
    + }
    +
    + share_ret = ksmbd_smb_check_shared_mode(fp->filp, fp);
    + if (!test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_OPLOCKS) ||
    + (req_op_level == SMB2_OPLOCK_LEVEL_LEASE &&
    + !(conn->vals->capabilities & SMB2_GLOBAL_CAP_LEASING))) {
    + if (share_ret < 0 && !S_ISDIR(FP_INODE(fp)->i_mode)) {
    + rc = share_ret;
    + goto err_out;
    + }
    + } else {
    + if (req_op_level == SMB2_OPLOCK_LEVEL_LEASE) {
    + req_op_level = smb2_map_lease_to_oplock(lc->req_state);
    + ksmbd_debug(SMB,
    + "lease req for(%s) req oplock state 0x%x, lease state 0x%x\n",
    + name, req_op_level, lc->req_state);
    + rc = find_same_lease_key(sess, fp->f_ci, lc);
    + if (rc)
    + goto err_out;
    + } else if (open_flags == O_RDONLY &&
    + (req_op_level == SMB2_OPLOCK_LEVEL_BATCH ||
    + req_op_level == SMB2_OPLOCK_LEVEL_EXCLUSIVE))
    + req_op_level = SMB2_OPLOCK_LEVEL_II;
    +
    + rc = smb_grant_oplock(work, req_op_level,
    + fp->persistent_id, fp,
    + le32_to_cpu(req->hdr.Id.SyncId.TreeId),
    + lc, share_ret);
    + if (rc < 0)
    + goto err_out;
    + }
    +
    + if (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)
    + ksmbd_fd_set_delete_on_close(fp, file_info);
    +
    + if (need_truncate) {
    + rc = smb2_create_truncate(&path);
    + if (rc)
    + goto err_out;
    + }
    +
    + if (req->CreateContextsOffset) {
    + struct create_alloc_size_req *az_req;
    +
    + az_req = (struct create_alloc_size_req *)smb2_find_context_vals(req,
    + SMB2_CREATE_ALLOCATION_SIZE);
    + if (IS_ERR(az_req)) {
    + rc = check_context_err(az_req,
    + SMB2_CREATE_ALLOCATION_SIZE);
    + if (rc < 0)
    + goto err_out;
    + } else {
    + loff_t alloc_size = le64_to_cpu(az_req->AllocationSize);
    + int err;
    +
    + ksmbd_debug(SMB,
    + "request smb2 create allocate size : %llu\n",
    + alloc_size);
    + err = ksmbd_vfs_alloc_size(work, fp, alloc_size);
    + if (err < 0)
    + ksmbd_debug(SMB,
    + "ksmbd_vfs_alloc_size is failed : %d\n",
    + err);
    + }
    +
    + context = smb2_find_context_vals(req, SMB2_CREATE_QUERY_ON_DISK_ID);
    + if (IS_ERR(context)) {
    + rc = check_context_err(context, SMB2_CREATE_QUERY_ON_DISK_ID);
    + if (rc < 0)
    + goto err_out;
    + } else {
    + ksmbd_debug(SMB, "get query on disk id context\n");
    + query_disk_id = 1;
    + }
    + }
    +
    + if (stat.result_mask & STATX_BTIME)
    + fp->create_time = ksmbd_UnixTimeToNT(stat.btime);
    + else
    + fp->create_time = ksmbd_UnixTimeToNT(stat.ctime);
    + if (req->FileAttributes || fp->f_ci->m_fattr == 0)
    + fp->f_ci->m_fattr =
    + cpu_to_le32(smb2_get_dos_mode(&stat, le32_to_cpu(req->FileAttributes)));
    +
    + if (!created)
    + smb2_update_xattrs(tcon, &path, fp);
    + else
    + smb2_new_xattrs(tcon, &path, fp);
    +
    + memcpy(fp->client_guid, conn->ClientGUID, SMB2_CLIENT_GUID_SIZE);
    +
    + generic_fillattr(&init_user_ns, FP_INODE(fp), &stat);
    +
    + rsp->StructureSize = cpu_to_le16(89);
    + rcu_read_lock();
    + opinfo = rcu_dereference(fp->f_opinfo);
    + rsp->OplockLevel = opinfo != NULL ? opinfo->level : 0;
    + rcu_read_unlock();
    + rsp->Reserved = 0;
    + rsp->CreateAction = cpu_to_le32(file_info);
    + rsp->CreationTime = cpu_to_le64(fp->create_time);
    + time = ksmbd_UnixTimeToNT(stat.atime);
    + rsp->LastAccessTime = cpu_to_le64(time);
    + time = ksmbd_UnixTimeToNT(stat.mtime);
    + rsp->LastWriteTime = cpu_to_le64(time);
    + time = ksmbd_UnixTimeToNT(stat.ctime);
    + rsp->ChangeTime = cpu_to_le64(time);
    + rsp->AllocationSize = S_ISDIR(stat.mode) ? 0 :
    + cpu_to_le64(stat.blocks << 9);
    + rsp->EndofFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
    + rsp->FileAttributes = fp->f_ci->m_fattr;
    +
    + rsp->Reserved2 = 0;
    +
    + rsp->PersistentFileId = cpu_to_le64(fp->persistent_id);
    + rsp->VolatileFileId = cpu_to_le64(fp->volatile_id);
    +
    + rsp->CreateContextsOffset = 0;
    + rsp->CreateContextsLength = 0;
    + inc_rfc1001_len(rsp_org, 88); /* StructureSize - 1*/
    +
    + /* If lease is request send lease context response */
    + if (opinfo && opinfo->is_lease) {
    + struct create_context *lease_ccontext;
    +
    + ksmbd_debug(SMB, "lease granted on(%s) lease state 0x%x\n",
    + name, opinfo->o_lease->state);
    + rsp->OplockLevel = SMB2_OPLOCK_LEVEL_LEASE;
    +
    + lease_ccontext = (struct create_context *)rsp->Buffer;
    + contxt_cnt++;
    + create_lease_buf(rsp->Buffer, opinfo->o_lease);
    + le32_add_cpu(&rsp->CreateContextsLength,
    + conn->vals->create_lease_size);
    + inc_rfc1001_len(rsp_org, conn->vals->create_lease_size);
    + next_ptr = &lease_ccontext->Next;
    + next_off = conn->vals->create_lease_size;
    + }
    +
    + if (maximal_access_ctxt) {
    + struct create_context *mxac_ccontext;
    +
    + if (maximal_access == 0)
    + ksmbd_vfs_query_maximal_access(path.dentry,
    + &maximal_access);
    + mxac_ccontext = (struct create_context *)(rsp->Buffer +
    + le32_to_cpu(rsp->CreateContextsLength));
    + contxt_cnt++;
    + create_mxac_rsp_buf(rsp->Buffer +
    + le32_to_cpu(rsp->CreateContextsLength),
    + le32_to_cpu(maximal_access));
    + le32_add_cpu(&rsp->CreateContextsLength,
    + conn->vals->create_mxac_size);
    + inc_rfc1001_len(rsp_org, conn->vals->create_mxac_size);
    + if (next_ptr)
    + *next_ptr = cpu_to_le32(next_off);
    + next_ptr = &mxac_ccontext->Next;
    + next_off = conn->vals->create_mxac_size;
    + }
    +
    + if (query_disk_id) {
    + struct create_context *disk_id_ccontext;
    +
    + disk_id_ccontext = (struct create_context *)(rsp->Buffer +
    + le32_to_cpu(rsp->CreateContextsLength));
    + contxt_cnt++;
    + create_disk_id_rsp_buf(rsp->Buffer +
    + le32_to_cpu(rsp->CreateContextsLength),
    + stat.ino, tcon->id);
    + le32_add_cpu(&rsp->CreateContextsLength,
    + conn->vals->create_disk_id_size);
    + inc_rfc1001_len(rsp_org, conn->vals->create_disk_id_size);
    + if (next_ptr)
    + *next_ptr = cpu_to_le32(next_off);
    + next_ptr = &disk_id_ccontext->Next;
    + next_off = conn->vals->create_disk_id_size;
    + }
    +
    + if (posix_ctxt) {
    + contxt_cnt++;
    + create_posix_rsp_buf(rsp->Buffer +
    + le32_to_cpu(rsp->CreateContextsLength),
    + fp);
    + le32_add_cpu(&rsp->CreateContextsLength,
    + conn->vals->create_posix_size);
    + inc_rfc1001_len(rsp_org, conn->vals->create_posix_size);
    + if (next_ptr)
    + *next_ptr = cpu_to_le32(next_off);
    + }
    +
    + if (contxt_cnt > 0) {
    + rsp->CreateContextsOffset =
    + cpu_to_le32(offsetof(struct smb2_create_rsp, Buffer)
    + - 4);
    + }
    +
    +err_out:
    + if (file_present || created)
    + path_put(&path);
    + ksmbd_revert_fsids(work);
    +err_out1:
    + if (rc) {
    + if (rc == -EINVAL)
    + rsp->hdr.Status = STATUS_INVALID_PARAMETER;
    + else if (rc == -EOPNOTSUPP)
    + rsp->hdr.Status = STATUS_NOT_SUPPORTED;
    + else if (rc == -EACCES || rc == -ESTALE)
    + rsp->hdr.Status = STATUS_ACCESS_DENIED;
    + else if (rc == -ENOENT)
    + rsp->hdr.Status = STATUS_OBJECT_NAME_INVALID;
    + else if (rc == -EPERM)
    + rsp->hdr.Status = STATUS_SHARING_VIOLATION;
    + else if (rc == -EBUSY)
    + rsp->hdr.Status = STATUS_DELETE_PENDING;
    + else if (rc == -EBADF)
    + rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND;
    + else if (rc == -ENOEXEC)
    + rsp->hdr.Status = STATUS_DUPLICATE_OBJECTID;
    + else if (rc == -ENXIO)
    + rsp->hdr.Status = STATUS_NO_SUCH_DEVICE;
    + else if (rc == -EEXIST)
    + rsp->hdr.Status = STATUS_OBJECT_NAME_COLLISION;
    + else if (rc == -EMFILE)
    + rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
    + if (!rsp->hdr.Status)
    + rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
    +
    + if (!fp || !fp->filename)
    + kfree(name);
    + if (fp)
    + ksmbd_fd_put(work, fp);
    + smb2_set_err_rsp(work);
    + ksmbd_debug(SMB, "Error response: %x\n", rsp->hdr.Status);
    + }
    +
    + kfree(lc);
    +
    + return 0;
    +}
    +
    +static int readdir_info_level_struct_sz(int info_level)
    +{
    + switch (info_level) {
    + case FILE_FULL_DIRECTORY_INFORMATION:
    + return sizeof(struct file_full_directory_info);
    + case FILE_BOTH_DIRECTORY_INFORMATION:
    + return sizeof(struct file_both_directory_info);
    + case FILE_DIRECTORY_INFORMATION:
    + return sizeof(struct file_directory_info);
    + case FILE_NAMES_INFORMATION:
    + return sizeof(struct file_names_info);
    + case FILEID_FULL_DIRECTORY_INFORMATION:
    + return sizeof(struct file_id_full_dir_info);
    + case FILEID_BOTH_DIRECTORY_INFORMATION:
    + return sizeof(struct file_id_both_directory_info);
    + case SMB_FIND_FILE_POSIX_INFO:
    + return sizeof(struct smb2_posix_info);
    + default:
    + return -EOPNOTSUPP;
    + }
    +}
    +
    +static int dentry_name(struct ksmbd_dir_info *d_info, int info_level)
    +{
    + switch (info_level) {
    + case FILE_FULL_DIRECTORY_INFORMATION:
    + {
    + struct file_full_directory_info *ffdinfo;
    +
    + ffdinfo = (struct file_full_directory_info *)d_info->rptr;
    + d_info->rptr += le32_to_cpu(ffdinfo->NextEntryOffset);
    + d_info->name = ffdinfo->FileName;
    + d_info->name_len = le32_to_cpu(ffdinfo->FileNameLength);
    + return 0;
    + }
    + case FILE_BOTH_DIRECTORY_INFORMATION:
    + {
    + struct file_both_directory_info *fbdinfo;
    +
    + fbdinfo = (struct file_both_directory_info *)d_info->rptr;
    + d_info->rptr += le32_to_cpu(fbdinfo->NextEntryOffset);
    + d_info->name = fbdinfo->FileName;
    + d_info->name_len = le32_to_cpu(fbdinfo->FileNameLength);
    + return 0;
    + }
    + case FILE_DIRECTORY_INFORMATION:
    + {
    + struct file_directory_info *fdinfo;
    +
    + fdinfo = (struct file_directory_info *)d_info->rptr;
    + d_info->rptr += le32_to_cpu(fdinfo->NextEntryOffset);
    + d_info->name = fdinfo->FileName;
    + d_info->name_len = le32_to_cpu(fdinfo->FileNameLength);
    + return 0;
    + }
    + case FILE_NAMES_INFORMATION:
    + {
    + struct file_names_info *fninfo;
    +
    + fninfo = (struct file_names_info *)d_info->rptr;
    + d_info->rptr += le32_to_cpu(fninfo->NextEntryOffset);
    + d_info->name = fninfo->FileName;
    + d_info->name_len = le32_to_cpu(fninfo->FileNameLength);
    + return 0;
    + }
    + case FILEID_FULL_DIRECTORY_INFORMATION:
    + {
    + struct file_id_full_dir_info *dinfo;
    +
    + dinfo = (struct file_id_full_dir_info *)d_info->rptr;
    + d_info->rptr += le32_to_cpu(dinfo->NextEntryOffset);
    + d_info->name = dinfo->FileName;
    + d_info->name_len = le32_to_cpu(dinfo->FileNameLength);
    + return 0;
    + }
    + case FILEID_BOTH_DIRECTORY_INFORMATION:
    + {
    + struct file_id_both_directory_info *fibdinfo;
    +
    + fibdinfo = (struct file_id_both_directory_info *)d_info->rptr;
    + d_info->rptr += le32_to_cpu(fibdinfo->NextEntryOffset);
    + d_info->name = fibdinfo->FileName;
    + d_info->name_len = le32_to_cpu(fibdinfo->FileNameLength);
    + return 0;
    + }
    + case SMB_FIND_FILE_POSIX_INFO:
    + {
    + struct smb2_posix_info *posix_info;
    +
    + posix_info = (struct smb2_posix_info *)d_info->rptr;
    + d_info->rptr += le32_to_cpu(posix_info->NextEntryOffset);
    + d_info->name = posix_info->name;
    + d_info->name_len = le32_to_cpu(posix_info->name_len);
    + return 0;
    + }
    + default:
    + return -EINVAL;
    + }
    +}
    +
    +/**
    + * smb2_populate_readdir_entry() - encode directory entry in smb2 response
    + * buffer
    + * @conn: connection instance
    + * @info_level: smb information level
    + * @d_info: structure included variables for query dir
    + * @ksmbd_kstat: ksmbd wrapper of dirent stat information
    + *
    + * if directory has many entries, find first can't read it fully.
    + * find next might be called multiple times to read remaining dir entries
    + *
    + * Return: 0 on success, otherwise error
    + */
    +static int smb2_populate_readdir_entry(struct ksmbd_conn *conn, int info_level,
    + struct ksmbd_dir_info *d_info,
    + struct ksmbd_kstat *ksmbd_kstat)
    +{
    + int next_entry_offset = 0;
    + char *conv_name;
    + int conv_len;
    + void *kstat;
    + int struct_sz;
    +
    + conv_name = ksmbd_convert_dir_info_name(d_info,
    + conn->local_nls,
    + &conv_len);
    + if (!conv_name)
    + return -ENOMEM;
    +
    + /* Somehow the name has only terminating NULL bytes */
    + if (conv_len < 0) {
    + kfree(conv_name);
    + return -EINVAL;
    + }
    +
    + struct_sz = readdir_info_level_struct_sz(info_level);
    + next_entry_offset = ALIGN(struct_sz - 1 + conv_len,
    + KSMBD_DIR_INFO_ALIGNMENT);
    +
    + if (next_entry_offset > d_info->out_buf_len) {
    + d_info->out_buf_len = 0;
    + return -ENOSPC;
    + }
    +
    + kstat = d_info->wptr;
    + if (info_level != FILE_NAMES_INFORMATION)
    + kstat = ksmbd_vfs_init_kstat(&d_info->wptr, ksmbd_kstat);
    +
    + switch (info_level) {
    + case FILE_FULL_DIRECTORY_INFORMATION:
    + {
    + struct file_full_directory_info *ffdinfo;
    +
    + ffdinfo = (struct file_full_directory_info *)kstat;
    + ffdinfo->FileNameLength = cpu_to_le32(conv_len);
    + ffdinfo->EaSize =
    + smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
    + if (ffdinfo->EaSize)
    + ffdinfo->ExtFileAttributes = ATTR_REPARSE_POINT_LE;
    + if (d_info->hide_dot_file && d_info->name[0] == '.')
    + ffdinfo->ExtFileAttributes |= ATTR_HIDDEN_LE;
    + memcpy(ffdinfo->FileName, conv_name, conv_len);
    + ffdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
    + break;
    + }
    + case FILE_BOTH_DIRECTORY_INFORMATION:
    + {
    + struct file_both_directory_info *fbdinfo;
    +
    + fbdinfo = (struct file_both_directory_info *)kstat;
    + fbdinfo->FileNameLength = cpu_to_le32(conv_len);
    + fbdinfo->EaSize =
    + smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
    + if (fbdinfo->EaSize)
    + fbdinfo->ExtFileAttributes = ATTR_REPARSE_POINT_LE;
    + fbdinfo->ShortNameLength = 0;
    + fbdinfo->Reserved = 0;
    + if (d_info->hide_dot_file && d_info->name[0] == '.')
    + fbdinfo->ExtFileAttributes |= ATTR_HIDDEN_LE;
    + memcpy(fbdinfo->FileName, conv_name, conv_len);
    + fbdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
    + break;
    + }
    + case FILE_DIRECTORY_INFORMATION:
    + {
    + struct file_directory_info *fdinfo;
    +
    + fdinfo = (struct file_directory_info *)kstat;
    + fdinfo->FileNameLength = cpu_to_le32(conv_len);
    + if (d_info->hide_dot_file && d_info->name[0] == '.')
    + fdinfo->ExtFileAttributes |= ATTR_HIDDEN_LE;
    + memcpy(fdinfo->FileName, conv_name, conv_len);
    + fdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
    + break;
    + }
    + case FILE_NAMES_INFORMATION:
    + {
    + struct file_names_info *fninfo;
    +
    + fninfo = (struct file_names_info *)kstat;
    + fninfo->FileNameLength = cpu_to_le32(conv_len);
    + memcpy(fninfo->FileName, conv_name, conv_len);
    + fninfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
    + break;
    + }
    + case FILEID_FULL_DIRECTORY_INFORMATION:
    + {
    + struct file_id_full_dir_info *dinfo;
    +
    + dinfo = (struct file_id_full_dir_info *)kstat;
    + dinfo->FileNameLength = cpu_to_le32(conv_len);
    + dinfo->EaSize =
    + smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
    + if (dinfo->EaSize)
    + dinfo->ExtFileAttributes = ATTR_REPARSE_POINT_LE;
    + dinfo->Reserved = 0;
    + dinfo->UniqueId = cpu_to_le64(ksmbd_kstat->kstat->ino);
    + if (d_info->hide_dot_file && d_info->name[0] == '.')
    + dinfo->ExtFileAttributes |= ATTR_HIDDEN_LE;
    + memcpy(dinfo->FileName, conv_name, conv_len);
    + dinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
    + break;
    + }
    + case FILEID_BOTH_DIRECTORY_INFORMATION:
    + {
    + struct file_id_both_directory_info *fibdinfo;
    +
    + fibdinfo = (struct file_id_both_directory_info *)kstat;
    + fibdinfo->FileNameLength = cpu_to_le32(conv_len);
    + fibdinfo->EaSize =
    + smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
    + if (fibdinfo->EaSize)
    + fibdinfo->ExtFileAttributes = ATTR_REPARSE_POINT_LE;
    + fibdinfo->UniqueId = cpu_to_le64(ksmbd_kstat->kstat->ino);
    + fibdinfo->ShortNameLength = 0;
    + fibdinfo->Reserved = 0;
    + fibdinfo->Reserved2 = cpu_to_le16(0);
    + if (d_info->hide_dot_file && d_info->name[0] == '.')
    + fibdinfo->ExtFileAttributes |= ATTR_HIDDEN_LE;
    + memcpy(fibdinfo->FileName, conv_name, conv_len);
    + fibdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
    + break;
    + }
    + case SMB_FIND_FILE_POSIX_INFO:
    + {
    + struct smb2_posix_info *posix_info;
    + u64 time;
    +
    + posix_info = (struct smb2_posix_info *)kstat;
    + posix_info->Ignored = 0;
    + posix_info->CreationTime = cpu_to_le64(ksmbd_kstat->create_time);
    + time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->ctime);
    + posix_info->ChangeTime = cpu_to_le64(time);
    + time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->atime);
    + posix_info->LastAccessTime = cpu_to_le64(time);
    + time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->mtime);
    + posix_info->LastWriteTime = cpu_to_le64(time);
    + posix_info->EndOfFile = cpu_to_le64(ksmbd_kstat->kstat->size);
    + posix_info->AllocationSize = cpu_to_le64(ksmbd_kstat->kstat->blocks << 9);
    + posix_info->DeviceId = cpu_to_le32(ksmbd_kstat->kstat->rdev);
    + posix_info->HardLinks = cpu_to_le32(ksmbd_kstat->kstat->nlink);
    + posix_info->Mode = cpu_to_le32(ksmbd_kstat->kstat->mode);
    + posix_info->Inode = cpu_to_le64(ksmbd_kstat->kstat->ino);
    + posix_info->DosAttributes =
    + S_ISDIR(ksmbd_kstat->kstat->mode) ? ATTR_DIRECTORY_LE : ATTR_ARCHIVE_LE;
    + if (d_info->hide_dot_file && d_info->name[0] == '.')
    + posix_info->DosAttributes |= ATTR_HIDDEN_LE;
    + id_to_sid(from_kuid(&init_user_ns, ksmbd_kstat->kstat->uid),
    + SIDNFS_USER, (struct smb_sid *)&posix_info->SidBuffer[0]);
    + id_to_sid(from_kgid(&init_user_ns, ksmbd_kstat->kstat->gid),
    + SIDNFS_GROUP, (struct smb_sid *)&posix_info->SidBuffer[20]);
    + memcpy(posix_info->name, conv_name, conv_len);
    + posix_info->name_len = cpu_to_le32(conv_len);
    + posix_info->NextEntryOffset = cpu_to_le32(next_entry_offset);
    + break;
    + }
    +
    + } /* switch (info_level) */
    +
    + d_info->last_entry_offset = d_info->data_count;
    + d_info->data_count += next_entry_offset;
    + d_info->out_buf_len -= next_entry_offset;
    + d_info->wptr += next_entry_offset;
    + kfree(conv_name);
    +
    + ksmbd_debug(SMB,
    + "info_level : %d, buf_len :%d, next_offset : %d, data_count : %d\n",
    + info_level, d_info->out_buf_len,
    + next_entry_offset, d_info->data_count);
    +
    + return 0;
    +}
    +
    +struct smb2_query_dir_private {
    + struct ksmbd_work *work;
    + char *search_pattern;
    + struct ksmbd_file *dir_fp;
    +
    + struct ksmbd_dir_info *d_info;
    + int info_level;
    +};
    +
    +static void lock_dir(struct ksmbd_file *dir_fp)
    +{
    + struct dentry *dir = dir_fp->filp->f_path.dentry;
    +
    + inode_lock_nested(d_inode(dir), I_MUTEX_PARENT);
    +}
    +
    +static void unlock_dir(struct ksmbd_file *dir_fp)
    +{
    + struct dentry *dir = dir_fp->filp->f_path.dentry;
    +
    + inode_unlock(d_inode(dir));
    +}
    +
    +static int process_query_dir_entries(struct smb2_query_dir_private *priv)
    +{
    + struct kstat kstat;
    + struct ksmbd_kstat ksmbd_kstat;
    + int rc;
    + int i;
    +
    + for (i = 0; i < priv->d_info->num_entry; i++) {
    + struct dentry *dent;
    +
    + if (dentry_name(priv->d_info, priv->info_level))
    + return -EINVAL;
    +
    + lock_dir(priv->dir_fp);
    + dent = lookup_one_len(priv->d_info->name,
    + priv->dir_fp->filp->f_path.dentry,
    + priv->d_info->name_len);
    + unlock_dir(priv->dir_fp);
    +
    + if (IS_ERR(dent)) {
    + ksmbd_debug(SMB, "Cannot lookup `%s' [%ld]\n",
    + priv->d_info->name,
    + PTR_ERR(dent));
    + continue;
    + }
    + if (unlikely(d_is_negative(dent))) {
    + dput(dent);
    + ksmbd_debug(SMB, "Negative dentry `%s'\n",
    + priv->d_info->name);
    + continue;
    + }
    +
    + ksmbd_kstat.kstat = &kstat;
    + if (priv->info_level != FILE_NAMES_INFORMATION)
    + ksmbd_vfs_fill_dentry_attrs(priv->work,
    + dent,
    + &ksmbd_kstat);
    +
    + rc = smb2_populate_readdir_entry(priv->work->conn,
    + priv->info_level,
    + priv->d_info,
    + &ksmbd_kstat);
    + dput(dent);
    + if (rc)
    + return rc;
    + }
    + return 0;
    +}
    +
    +static int reserve_populate_dentry(struct ksmbd_dir_info *d_info,
    + int info_level)
    +{
    + int struct_sz;
    + int conv_len;
    + int next_entry_offset;
    +
    + struct_sz = readdir_info_level_struct_sz(info_level);
    + if (struct_sz == -EOPNOTSUPP)
    + return -EOPNOTSUPP;
    +
    + conv_len = (d_info->name_len + 1) * 2;
    + next_entry_offset = ALIGN(struct_sz - 1 + conv_len,
    + KSMBD_DIR_INFO_ALIGNMENT);
    +
    + if (next_entry_offset > d_info->out_buf_len) {
    + d_info->out_buf_len = 0;
    + return -ENOSPC;
    + }
    +
    + switch (info_level) {
    + case FILE_FULL_DIRECTORY_INFORMATION:
    + {
    + struct file_full_directory_info *ffdinfo;
    +
    + ffdinfo = (struct file_full_directory_info *)d_info->wptr;
    + memcpy(ffdinfo->FileName, d_info->name, d_info->name_len);
    + ffdinfo->FileName[d_info->name_len] = 0x00;
    + ffdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
    + ffdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
    + break;
    + }
    + case FILE_BOTH_DIRECTORY_INFORMATION:
    + {
    + struct file_both_directory_info *fbdinfo;
    +
    + fbdinfo = (struct file_both_directory_info *)d_info->wptr;
    + memcpy(fbdinfo->FileName, d_info->name, d_info->name_len);
    + fbdinfo->FileName[d_info->name_len] = 0x00;
    + fbdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
    + fbdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
    + break;
    + }
    + case FILE_DIRECTORY_INFORMATION:
    + {
    + struct file_directory_info *fdinfo;
    +
    + fdinfo = (struct file_directory_info *)d_info->wptr;
    + memcpy(fdinfo->FileName, d_info->name, d_info->name_len);
    + fdinfo->FileName[d_info->name_len] = 0x00;
    + fdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
    + fdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
    + break;
    + }
    + case FILE_NAMES_INFORMATION:
    + {
    + struct file_names_info *fninfo;
    +
    + fninfo = (struct file_names_info *)d_info->wptr;
    + memcpy(fninfo->FileName, d_info->name, d_info->name_len);
    + fninfo->FileName[d_info->name_len] = 0x00;
    + fninfo->FileNameLength = cpu_to_le32(d_info->name_len);
    + fninfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
    + break;
    + }
    + case FILEID_FULL_DIRECTORY_INFORMATION:
    + {
    + struct file_id_full_dir_info *dinfo;
    +
    + dinfo = (struct file_id_full_dir_info *)d_info->wptr;
    + memcpy(dinfo->FileName, d_info->name, d_info->name_len);
    + dinfo->FileName[d_info->name_len] = 0x00;
    + dinfo->FileNameLength = cpu_to_le32(d_info->name_len);
    + dinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
    + break;
    + }
    + case FILEID_BOTH_DIRECTORY_INFORMATION:
    + {
    + struct file_id_both_directory_info *fibdinfo;
    +
    + fibdinfo = (struct file_id_both_directory_info *)d_info->wptr;
    + memcpy(fibdinfo->FileName, d_info->name, d_info->name_len);
    + fibdinfo->FileName[d_info->name_len] = 0x00;
    + fibdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
    + fibdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
    + break;
    + }
    + case SMB_FIND_FILE_POSIX_INFO:
    + {
    + struct smb2_posix_info *posix_info;
    +
    + posix_info = (struct smb2_posix_info *)d_info->wptr;
    + memcpy(posix_info->name, d_info->name, d_info->name_len);
    + posix_info->name[d_info->name_len] = 0x00;
    + posix_info->name_len = cpu_to_le32(d_info->name_len);
    + posix_info->NextEntryOffset =
    + cpu_to_le32(next_entry_offset);
    + break;
    + }
    + } /* switch (info_level) */
    +
    + d_info->num_entry++;
    + d_info->out_buf_len -= next_entry_offset;
    + d_info->wptr += next_entry_offset;
    + return 0;
    +}
    +
    +static int __query_dir(struct dir_context *ctx, const char *name, int namlen,
    + loff_t offset, u64 ino, unsigned int d_type)
    +{
    + struct ksmbd_readdir_data *buf;
    + struct smb2_query_dir_private *priv;
    + struct ksmbd_dir_info *d_info;
    + int rc;
    +
    + buf = container_of(ctx, struct ksmbd_readdir_data, ctx);
    + priv = buf->private;
    + d_info = priv->d_info;
    +
    + /* dot and dotdot entries are already reserved */
    + if (!strcmp(".", name) || !strcmp("..", name))
    + return 0;
    + if (ksmbd_share_veto_filename(priv->work->tcon->share_conf, name))
    + return 0;
    + if (!match_pattern(name, namlen, priv->search_pattern))
    + return 0;
    +
    + d_info->name = name;
    + d_info->name_len = namlen;
    + rc = reserve_populate_dentry(d_info, priv->info_level);
    + if (rc)
    + return rc;
    + if (d_info->flags & SMB2_RETURN_SINGLE_ENTRY) {
    + d_info->out_buf_len = 0;
    + return 0;
    + }
    + return 0;
    +}
    +
    +static void restart_ctx(struct dir_context *ctx)
    +{
    + ctx->pos = 0;
    +}
    +
    +static int verify_info_level(int info_level)
    +{
    + switch (info_level) {
    + case FILE_FULL_DIRECTORY_INFORMATION:
    + case FILE_BOTH_DIRECTORY_INFORMATION:
    + case FILE_DIRECTORY_INFORMATION:
    + case FILE_NAMES_INFORMATION:
    + case FILEID_FULL_DIRECTORY_INFORMATION:
    + case FILEID_BOTH_DIRECTORY_INFORMATION:
    + case SMB_FIND_FILE_POSIX_INFO:
    + break;
    + default:
    + return -EOPNOTSUPP;
    + }
    +
    + return 0;
    +}
    +
    +int smb2_query_dir(struct ksmbd_work *work)
    +{
    + struct ksmbd_conn *conn = work->conn;
    + struct smb2_query_directory_req *req;
    + struct smb2_query_directory_rsp *rsp, *rsp_org;
    + struct ksmbd_share_config *share = work->tcon->share_conf;
    + struct ksmbd_file *dir_fp = NULL;
    + struct ksmbd_dir_info d_info;
    + int rc = 0;
    + char *srch_ptr = NULL;
    + unsigned char srch_flag;
    + int buffer_sz;
    + struct smb2_query_dir_private query_dir_private = {NULL, };
    +
    + rsp_org = work->response_buf;
    + WORK_BUFFERS(work, req, rsp);
    +
    + if (ksmbd_override_fsids(work)) {
    + rsp->hdr.Status = STATUS_NO_MEMORY;
    + smb2_set_err_rsp(work);
    + return -ENOMEM;
    + }
    +
    + rc = verify_info_level(req->FileInformationClass);
    + if (rc) {
    + rc = -EFAULT;
    + goto err_out2;
    + }
    +
    + dir_fp = ksmbd_lookup_fd_slow(work,
    + le64_to_cpu(req->VolatileFileId),
    + le64_to_cpu(req->PersistentFileId));
    + if (!dir_fp) {
    + rc = -EBADF;
    + goto err_out2;
    + }
    +
    + if (!(dir_fp->daccess & FILE_LIST_DIRECTORY_LE) ||
    + inode_permission(&init_user_ns, file_inode(dir_fp->filp),
    + MAY_READ | MAY_EXEC)) {
    + ksmbd_err("no right to enumerate directory (%s)\n",
    + FP_FILENAME(dir_fp));
    + rc = -EACCES;
    + goto err_out2;
    + }
    +
    + if (!S_ISDIR(file_inode(dir_fp->filp)->i_mode)) {
    + ksmbd_err("can't do query dir for a file\n");
    + rc = -EINVAL;
    + goto err_out2;
    + }
    +
    + srch_flag = req->Flags;
    + srch_ptr = smb_strndup_from_utf16(req->Buffer,
    + le16_to_cpu(req->FileNameLength), 1,
    + conn->local_nls);
    + if (IS_ERR(srch_ptr)) {
    + ksmbd_debug(SMB, "Search Pattern not found\n");
    + rc = -EINVAL;
    + goto err_out2;
    + } else {
    + ksmbd_debug(SMB, "Search pattern is %s\n", srch_ptr);
    + }
    +
    + ksmbd_debug(SMB, "Directory name is %s\n", dir_fp->filename);
    +
    + if (srch_flag & SMB2_REOPEN || srch_flag & SMB2_RESTART_SCANS) {
    + ksmbd_debug(SMB, "Restart directory scan\n");
    + generic_file_llseek(dir_fp->filp, 0, SEEK_SET);
    + restart_ctx(&dir_fp->readdir_data.ctx);
    + }
    +
    + memset(&d_info, 0, sizeof(struct ksmbd_dir_info));
    + d_info.wptr = (char *)rsp->Buffer;
    + d_info.rptr = (char *)rsp->Buffer;
    + d_info.out_buf_len = (work->response_sz - (get_rfc1002_len(rsp_org) + 4));
    + d_info.out_buf_len = min_t(int, d_info.out_buf_len, le32_to_cpu(req->OutputBufferLength)) -
    + sizeof(struct smb2_query_directory_rsp);
    + d_info.flags = srch_flag;
    +
    + /*
    + * reserve dot and dotdot entries in head of buffer
    + * in first response
    + */
    + rc = ksmbd_populate_dot_dotdot_entries(work, req->FileInformationClass,
    + dir_fp, &d_info, srch_ptr,
    + smb2_populate_readdir_entry);
    + if (rc == -ENOSPC)
    + rc = 0;
    + else if (rc)
    + goto err_out;
    +
    + if (test_share_config_flag(share, KSMBD_SHARE_FLAG_HIDE_DOT_FILES))
    + d_info.hide_dot_file = true;
    +
    + buffer_sz = d_info.out_buf_len;
    + d_info.rptr = d_info.wptr;
    + query_dir_private.work = work;
    + query_dir_private.search_pattern = srch_ptr;
    + query_dir_private.dir_fp = dir_fp;
    + query_dir_private.d_info = &d_info;
    + query_dir_private.info_level = req->FileInformationClass;
    + dir_fp->readdir_data.private = &query_dir_private;
    + set_ctx_actor(&dir_fp->readdir_data.ctx, __query_dir);
    +
    + rc = ksmbd_vfs_readdir(dir_fp->filp, &dir_fp->readdir_data);
    + if (rc == 0)
    + restart_ctx(&dir_fp->readdir_data.ctx);
    + if (rc == -ENOSPC)
    + rc = 0;
    + if (rc)
    + goto err_out;
    +
    + d_info.wptr = d_info.rptr;
    + d_info.out_buf_len = buffer_sz;
    + rc = process_query_dir_entries(&query_dir_private);
    + if (rc)
    + goto err_out;
    +
    + if (!d_info.data_count && d_info.out_buf_len >= 0) {
    + if (srch_flag & SMB2_RETURN_SINGLE_ENTRY && !is_asterisk(srch_ptr)) {
    + rsp->hdr.Status = STATUS_NO_SUCH_FILE;
    + } else {
    + dir_fp->dot_dotdot[0] = dir_fp->dot_dotdot[1] = 0;
    + rsp->hdr.Status = STATUS_NO_MORE_FILES;
    + }
    + rsp->StructureSize = cpu_to_le16(9);
    + rsp->OutputBufferOffset = cpu_to_le16(0);
    + rsp->OutputBufferLength = cpu_to_le32(0);
    + rsp->Buffer[0] = 0;
    + inc_rfc1001_len(rsp_org, 9);
    + } else {
    + ((struct file_directory_info *)
    + ((char *)rsp->Buffer + d_info.last_entry_offset))
    + ->NextEntryOffset = 0;
    +
    + rsp->StructureSize = cpu_to_le16(9);
    + rsp->OutputBufferOffset = cpu_to_le16(72);
    + rsp->OutputBufferLength = cpu_to_le32(d_info.data_count);
    + inc_rfc1001_len(rsp_org, 8 + d_info.data_count);
    + }
    +
    + kfree(srch_ptr);
    + ksmbd_fd_put(work, dir_fp);
    + ksmbd_revert_fsids(work);
    + return 0;
    +
    +err_out:
    + ksmbd_err("error while processing smb2 query dir rc = %d\n", rc);
    + kfree(srch_ptr);
    +
    +err_out2:
    + if (rc == -EINVAL)
    + rsp->hdr.Status = STATUS_INVALID_PARAMETER;
    + else if (rc == -EACCES)
    + rsp->hdr.Status = STATUS_ACCESS_DENIED;
    + else if (rc == -ENOENT)
    + rsp->hdr.Status = STATUS_NO_SUCH_FILE;
    + else if (rc == -EBADF)
    + rsp->hdr.Status = STATUS_FILE_CLOSED;
    + else if (rc == -ENOMEM)
    + rsp->hdr.Status = STATUS_NO_MEMORY;
    + else if (rc == -EFAULT)
    + rsp->hdr.Status = STATUS_INVALID_INFO_CLASS;
    + if (!rsp->hdr.Status)
    + rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
    +
    + smb2_set_err_rsp(work);
    + ksmbd_fd_put(work, dir_fp);
    + ksmbd_revert_fsids(work);
    + return 0;
    +}
    +
    +/**
    + * buffer_check_err() - helper function to check buffer errors
    + * @reqOutputBufferLength: max buffer length expected in command response
    + * @rsp: query info response buffer contains output buffer length
    + * @infoclass_size: query info class response buffer size
    + *
    + * Return: 0 on success, otherwise error
    + */
    +static int buffer_check_err(int reqOutputBufferLength,
    + struct smb2_query_info_rsp *rsp, int infoclass_size)
    +{
    + if (reqOutputBufferLength < le32_to_cpu(rsp->OutputBufferLength)) {
    + if (reqOutputBufferLength < infoclass_size) {
    + ksmbd_err("Invalid Buffer Size Requested\n");
    + rsp->hdr.Status = STATUS_INFO_LENGTH_MISMATCH;
    + rsp->hdr.smb2_buf_length = cpu_to_be32(sizeof(struct smb2_hdr) - 4);
    + return -EINVAL;
    + }
    +
    + ksmbd_debug(SMB, "Buffer Overflow\n");
    + rsp->hdr.Status = STATUS_BUFFER_OVERFLOW;
    + rsp->hdr.smb2_buf_length = cpu_to_be32(sizeof(struct smb2_hdr) - 4 +
    + reqOutputBufferLength);
    + rsp->OutputBufferLength = cpu_to_le32(reqOutputBufferLength);
    + }
    + return 0;
    +}
    +
    +static void get_standard_info_pipe(struct smb2_query_info_rsp *rsp)
    +{
    + struct smb2_file_standard_info *sinfo;
    +
    + sinfo = (struct smb2_file_standard_info *)rsp->Buffer;
    +
    + sinfo->AllocationSize = cpu_to_le64(4096);
    + sinfo->EndOfFile = cpu_to_le64(0);
    + sinfo->NumberOfLinks = cpu_to_le32(1);
    + sinfo->DeletePending = 1;
    + sinfo->Directory = 0;
    + rsp->OutputBufferLength =
    + cpu_to_le32(sizeof(struct smb2_file_standard_info));
    + inc_rfc1001_len(rsp, sizeof(struct smb2_file_standard_info));
    +}
    +
    +static void get_internal_info_pipe(struct smb2_query_info_rsp *rsp, u64 num)
    +{
    + struct smb2_file_internal_info *file_info;
    +
    + file_info = (struct smb2_file_internal_info *)rsp->Buffer;
    +
    + /* any unique number */
    + file_info->IndexNumber = cpu_to_le64(num | (1ULL << 63));
    + rsp->OutputBufferLength =
    + cpu_to_le32(sizeof(struct smb2_file_internal_info));
    + inc_rfc1001_len(rsp, sizeof(struct smb2_file_internal_info));
    +}
    +
    +static int smb2_get_info_file_pipe(struct ksmbd_session *sess,
    + struct smb2_query_info_req *req,
    + struct smb2_query_info_rsp *rsp)
    +{
    + u64 id;
    + int rc;
    +
    + /*
    + * Windows can sometime send query file info request on
    + * pipe without opening it, checking error condition here
    + */
    + id = le64_to_cpu(req->VolatileFileId);
    + if (!ksmbd_session_rpc_method(sess, id))
    + return -ENOENT;
    +
    + ksmbd_debug(SMB, "FileInfoClass %u, FileId 0x%llx\n",
    + req->FileInfoClass, le64_to_cpu(req->VolatileFileId));
    +
    + switch (req->FileInfoClass) {
    + case FILE_STANDARD_INFORMATION:
    + get_standard_info_pipe(rsp);
    + rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
    + rsp, FILE_STANDARD_INFORMATION_SIZE);
    + break;
    + case FILE_INTERNAL_INFORMATION:
    + get_internal_info_pipe(rsp, id);
    + rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
    + rsp, FILE_INTERNAL_INFORMATION_SIZE);
    + break;
    + default:
    + ksmbd_debug(SMB, "smb2_info_file_pipe for %u not supported\n",
    + req->FileInfoClass);
    + rc = -EOPNOTSUPP;
    + }
    + return rc;
    +}
    +
    +/**
    + * smb2_get_ea() - handler for smb2 get extended attribute command
    + * @work: smb work containing query info command buffer
    + * @fp: ksmbd_file pointer
    + * @req: get extended attribute request
    + * @rsp: response buffer pointer
    + * @rsp_org: base response buffer pointer in case of chained response
    + *
    + * Return: 0 on success, otherwise error
    + */
    +static int smb2_get_ea(struct ksmbd_work *work, struct ksmbd_file *fp,
    + struct smb2_query_info_req *req,
    + struct smb2_query_info_rsp *rsp, void *rsp_org)
    +{
    + struct smb2_ea_info *eainfo, *prev_eainfo;
    + char *name, *ptr, *xattr_list = NULL, *buf;
    + int rc, name_len, value_len, xattr_list_len, idx;
    + ssize_t buf_free_len, alignment_bytes, next_offset, rsp_data_cnt = 0;
    + struct smb2_ea_info_req *ea_req = NULL;
    + struct path *path;
    +
    + if (!(fp->daccess & FILE_READ_EA_LE)) {
    + ksmbd_err("Not permitted to read ext attr : 0x%x\n",
    + fp->daccess);
    + return -EACCES;
    + }
    +
    + path = &fp->filp->f_path;
    + /* single EA entry is requested with given user.* name */
    + if (req->InputBufferLength) {
    + ea_req = (struct smb2_ea_info_req *)req->Buffer;
    + } else {
    + /* need to send all EAs, if no specific EA is requested*/
    + if (le32_to_cpu(req->Flags) & SL_RETURN_SINGLE_ENTRY)
    + ksmbd_debug(SMB,
    + "All EAs are requested but need to send single EA entry in rsp flags 0x%x\n",
    + le32_to_cpu(req->Flags));
    + }
    +
    + buf_free_len = work->response_sz -
    + (get_rfc1002_len(rsp_org) + 4) -
    + sizeof(struct smb2_query_info_rsp);
    +
    + if (le32_to_cpu(req->OutputBufferLength) < buf_free_len)
    + buf_free_len = le32_to_cpu(req->OutputBufferLength);
    +
    + rc = ksmbd_vfs_listxattr(path->dentry, &xattr_list);
    + if (rc < 0) {
    + rsp->hdr.Status = STATUS_INVALID_HANDLE;
    + goto out;
    + } else if (!rc) { /* there is no EA in the file */
    + ksmbd_debug(SMB, "no ea data in the file\n");
    + goto done;
    + }
    + xattr_list_len = rc;
    +
    + ptr = (char *)rsp->Buffer;
    + eainfo = (struct smb2_ea_info *)ptr;
    + prev_eainfo = eainfo;
    + idx = 0;
    +
    + while (idx < xattr_list_len) {
    + name = xattr_list + idx;
    + name_len = strlen(name);
    +
    + ksmbd_debug(SMB, "%s, len %d\n", name, name_len);
    + idx += name_len + 1;
    +
    + /*
    + * CIFS does not support EA other than user.* namespace,
    + * still keep the framework generic, to list other attrs
    + * in future.
    + */
    + if (strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
    + continue;
    +
    + if (!strncmp(&name[XATTR_USER_PREFIX_LEN], STREAM_PREFIX,
    + STREAM_PREFIX_LEN))
    + continue;
    +
    + if (req->InputBufferLength &&
    + strncmp(&name[XATTR_USER_PREFIX_LEN], ea_req->name,
    + ea_req->EaNameLength))
    + continue;
    +
    + if (!strncmp(&name[XATTR_USER_PREFIX_LEN],
    + DOS_ATTRIBUTE_PREFIX, DOS_ATTRIBUTE_PREFIX_LEN))
    + continue;
    +
    + if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
    + name_len -= XATTR_USER_PREFIX_LEN;
    +
    + ptr = (char *)(&eainfo->name + name_len + 1);
    + buf_free_len -= (offsetof(struct smb2_ea_info, name) +
    + name_len + 1);
    + /* bailout if xattr can't fit in buf_free_len */
    + value_len = ksmbd_vfs_getxattr(path->dentry, name, &buf);
    + if (value_len <= 0) {
    + rc = -ENOENT;
    + rsp->hdr.Status = STATUS_INVALID_HANDLE;
    + goto out;
    + }
    +
    + buf_free_len -= value_len;
    + if (buf_free_len < 0) {
    + kfree(buf);
    + break;
    + }
    +
    + memcpy(ptr, buf, value_len);
    + kfree(buf);
    +
    + ptr += value_len;
    + eainfo->Flags = 0;
    + eainfo->EaNameLength = name_len;
    +
    + if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
    + memcpy(eainfo->name, &name[XATTR_USER_PREFIX_LEN],
    + name_len);
    + else
    + memcpy(eainfo->name, name, name_len);
    +
    + eainfo->name[name_len] = '\0';
    + eainfo->EaValueLength = cpu_to_le16(value_len);
    + next_offset = offsetof(struct smb2_ea_info, name) +
    + name_len + 1 + value_len;
    +
    + /* align next xattr entry at 4 byte bundary */
    + alignment_bytes = ((next_offset + 3) & ~3) - next_offset;
    + if (alignment_bytes) {
    + memset(ptr, '\0', alignment_bytes);
    + ptr += alignment_bytes;
    + next_offset += alignment_bytes;
    + buf_free_len -= alignment_bytes;
    + }
    + eainfo->NextEntryOffset = cpu_to_le32(next_offset);
    + prev_eainfo = eainfo;
    + eainfo = (struct smb2_ea_info *)ptr;
    + rsp_data_cnt += next_offset;
    +
    + if (req->InputBufferLength) {
    + ksmbd_debug(SMB, "single entry requested\n");
    + break;
    + }
    + }
    +
    + /* no more ea entries */
    + prev_eainfo->NextEntryOffset = 0;
    +done:
    + rc = 0;
    + if (rsp_data_cnt == 0)
    + rsp->hdr.Status = STATUS_NO_EAS_ON_FILE;
    + rsp->OutputBufferLength = cpu_to_le32(rsp_data_cnt);
    + inc_rfc1001_len(rsp_org, rsp_data_cnt);
    +out:
    + kvfree(xattr_list);
    + return rc;
    +}
    +
    +static void get_file_access_info(struct smb2_query_info_rsp *rsp,
    + struct ksmbd_file *fp, void *rsp_org)
    +{
    + struct smb2_file_access_info *file_info;
    +
    + file_info = (struct smb2_file_access_info *)rsp->Buffer;
    + file_info->AccessFlags = fp->daccess;
    + rsp->OutputBufferLength =
    + cpu_to_le32(sizeof(struct smb2_file_access_info));
    + inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_access_info));
    +}
    +
    +static int get_file_basic_info(struct smb2_query_info_rsp *rsp,
    + struct ksmbd_file *fp, void *rsp_org)
    +{
    + struct smb2_file_all_info *basic_info;
    + struct kstat stat;
    + u64 time;
    +
    + if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
    + ksmbd_err("no right to read the attributes : 0x%x\n",
    + fp->daccess);
    + return -EACCES;
    + }
    +
    + basic_info = (struct smb2_file_all_info *)rsp->Buffer;
    + generic_fillattr(&init_user_ns, FP_INODE(fp), &stat);
    + basic_info->CreationTime = cpu_to_le64(fp->create_time);
    + time = ksmbd_UnixTimeToNT(stat.atime);
    + basic_info->LastAccessTime = cpu_to_le64(time);
    + time = ksmbd_UnixTimeToNT(stat.mtime);
    + basic_info->LastWriteTime = cpu_to_le64(time);
    + time = ksmbd_UnixTimeToNT(stat.ctime);
    + basic_info->ChangeTime = cpu_to_le64(time);
    + basic_info->Attributes = fp->f_ci->m_fattr;
    + basic_info->Pad1 = 0;
    + rsp->OutputBufferLength =
    + cpu_to_le32(offsetof(struct smb2_file_all_info, AllocationSize));
    + inc_rfc1001_len(rsp_org, offsetof(struct smb2_file_all_info,
    + AllocationSize));
    + return 0;
    +}
    +
    +static unsigned long long get_allocation_size(struct inode *inode,
    + struct kstat *stat)
    +{
    + unsigned long long alloc_size = 0;
    +
    + if (!S_ISDIR(stat->mode)) {
    + if ((inode->i_blocks << 9) <= stat->size)
    + alloc_size = stat->size;
    + else
    + alloc_size = inode->i_blocks << 9;
    + }
    +
    + return alloc_size;
    +}
    +
    +static void get_file_standard_info(struct smb2_query_info_rsp *rsp,
    + struct ksmbd_file *fp, void *rsp_org)
    +{
    + struct smb2_file_standard_info *sinfo;
    + unsigned int delete_pending;
    + struct inode *inode;
    + struct kstat stat;
    +
    + inode = FP_INODE(fp);
    + generic_fillattr(&init_user_ns, inode, &stat);
    +
    + sinfo = (struct smb2_file_standard_info *)rsp->Buffer;
    + delete_pending = ksmbd_inode_pending_delete(fp);
    +
    + sinfo->AllocationSize = cpu_to_le64(get_allocation_size(inode, &stat));
    + sinfo->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
    + sinfo->NumberOfLinks = cpu_to_le32(get_nlink(&stat) - delete_pending);
    + sinfo->DeletePending = delete_pending;
    + sinfo->Directory = S_ISDIR(stat.mode) ? 1 : 0;
    + rsp->OutputBufferLength =
    + cpu_to_le32(sizeof(struct smb2_file_standard_info));
    + inc_rfc1001_len(rsp_org,
    + sizeof(struct smb2_file_standard_info));
    +}
    +
    +static void get_file_alignment_info(struct smb2_query_info_rsp *rsp,
    + void *rsp_org)
    +{
    + struct smb2_file_alignment_info *file_info;
    +
    + file_info = (struct smb2_file_alignment_info *)rsp->Buffer;
    + file_info->AlignmentRequirement = 0;
    + rsp->OutputBufferLength =
    + cpu_to_le32(sizeof(struct smb2_file_alignment_info));
    + inc_rfc1001_len(rsp_org,
    + sizeof(struct smb2_file_alignment_info));
    +}
    +
    +static int get_file_all_info(struct ksmbd_work *work,
    + struct smb2_query_info_rsp *rsp,
    + struct ksmbd_file *fp,
    + void *rsp_org)
    +{
    + struct ksmbd_conn *conn = work->conn;
    + struct smb2_file_all_info *file_info;
    + unsigned int delete_pending;
    + struct inode *inode;
    + struct kstat stat;
    + int conv_len;
    + char *filename;
    + u64 time;
    +
    + if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
    + ksmbd_debug(SMB, "no right to read the attributes : 0x%x\n",
    + fp->daccess);
    + return -EACCES;
    + }
    +
    + filename = convert_to_nt_pathname(fp->filename,
    + work->tcon->share_conf->path);
    + if (!filename)
    + return -ENOMEM;
    +
    + inode = FP_INODE(fp);
    + generic_fillattr(&init_user_ns, inode, &stat);
    +
    + ksmbd_debug(SMB, "filename = %s\n", filename);
    + delete_pending = ksmbd_inode_pending_delete(fp);
    + file_info = (struct smb2_file_all_info *)rsp->Buffer;
    +
    + file_info->CreationTime = cpu_to_le64(fp->create_time);
    + time = ksmbd_UnixTimeToNT(stat.atime);
    + file_info->LastAccessTime = cpu_to_le64(time);
    + time = ksmbd_UnixTimeToNT(stat.mtime);
    + file_info->LastWriteTime = cpu_to_le64(time);
    + time = ksmbd_UnixTimeToNT(stat.ctime);
    + file_info->ChangeTime = cpu_to_le64(time);
    + file_info->Attributes = fp->f_ci->m_fattr;
    + file_info->Pad1 = 0;
    + file_info->AllocationSize =
    + cpu_to_le64(get_allocation_size(inode, &stat));
    + file_info->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
    + file_info->NumberOfLinks =
    + cpu_to_le32(get_nlink(&stat) - delete_pending);
    + file_info->DeletePending = delete_pending;
    + file_info->Directory = S_ISDIR(stat.mode) ? 1 : 0;
    + file_info->Pad2 = 0;
    + file_info->IndexNumber = cpu_to_le64(stat.ino);
    + file_info->EASize = 0;
    + file_info->AccessFlags = fp->daccess;
    + file_info->CurrentByteOffset = cpu_to_le64(fp->filp->f_pos);
    + file_info->Mode = fp->coption;
    + file_info->AlignmentRequirement = 0;
    + conv_len = smbConvertToUTF16((__le16 *)file_info->FileName, filename,
    + PATH_MAX, conn->local_nls, 0);
    + conv_len *= 2;
    + file_info->FileNameLength = cpu_to_le32(conv_len);
    + rsp->OutputBufferLength =
    + cpu_to_le32(sizeof(struct smb2_file_all_info) + conv_len - 1);
    + kfree(filename);
    + inc_rfc1001_len(rsp_org, le32_to_cpu(rsp->OutputBufferLength));
    + return 0;
    +}
    +
    +static void get_file_alternate_info(struct ksmbd_work *work,
    + struct smb2_query_info_rsp *rsp,
    + struct ksmbd_file *fp,
    + void *rsp_org)
    +{
    + struct ksmbd_conn *conn = work->conn;
    + struct smb2_file_alt_name_info *file_info;
    + int conv_len;
    + char *filename;
    +
    + filename = (char *)FP_FILENAME(fp);
    + file_info = (struct smb2_file_alt_name_info *)rsp->Buffer;
    + conv_len = ksmbd_extract_shortname(conn,
    + filename,
    + file_info->FileName);
    + file_info->FileNameLength = cpu_to_le32(conv_len);
    + rsp->OutputBufferLength =
    + cpu_to_le32(sizeof(struct smb2_file_alt_name_info) + conv_len);
    + inc_rfc1001_len(rsp_org, le32_to_cpu(rsp->OutputBufferLength));
    +}
    +
    +static void get_file_stream_info(struct ksmbd_work *work,
    + struct smb2_query_info_rsp *rsp,
    + struct ksmbd_file *fp,
    + void *rsp_org)
    +{
    + struct ksmbd_conn *conn = work->conn;
    + struct smb2_file_stream_info *file_info;
    + char *stream_name, *xattr_list = NULL, *stream_buf;
    + struct kstat stat;
    + struct path *path = &fp->filp->f_path;
    + ssize_t xattr_list_len;
    + int nbytes = 0, streamlen, stream_name_len, next, idx = 0;
    +
    + generic_fillattr(&init_user_ns, FP_INODE(fp), &stat);
    + file_info = (struct smb2_file_stream_info *)rsp->Buffer;
    +
    + xattr_list_len = ksmbd_vfs_listxattr(path->dentry, &xattr_list);
    + if (xattr_list_len < 0) {
    + goto out;
    + } else if (!xattr_list_len) {
    + ksmbd_debug(SMB, "empty xattr in the file\n");
    + goto out;
    + }
    +
    + while (idx < xattr_list_len) {
    + stream_name = xattr_list + idx;
    + streamlen = strlen(stream_name);
    + idx += streamlen + 1;
    +
    + ksmbd_debug(SMB, "%s, len %d\n", stream_name, streamlen);
    +
    + if (strncmp(&stream_name[XATTR_USER_PREFIX_LEN],
    + STREAM_PREFIX, STREAM_PREFIX_LEN))
    + continue;
    +
    + stream_name_len = streamlen - (XATTR_USER_PREFIX_LEN +
    + STREAM_PREFIX_LEN);
    + streamlen = stream_name_len;
    +
    + /* plus : size */
    + streamlen += 1;
    + stream_buf = kmalloc(streamlen + 1, GFP_KERNEL);
    + if (!stream_buf)
    + break;
    +
    + streamlen = snprintf(stream_buf, streamlen + 1,
    + ":%s", &stream_name[XATTR_NAME_STREAM_LEN]);
    +
    + file_info = (struct smb2_file_stream_info *)&rsp->Buffer[nbytes];
    + streamlen = smbConvertToUTF16((__le16 *)file_info->StreamName,
    + stream_buf, streamlen,
    + conn->local_nls, 0);
    + streamlen *= 2;
    + kfree(stream_buf);
    + file_info->StreamNameLength = cpu_to_le32(streamlen);
    + file_info->StreamSize = cpu_to_le64(stream_name_len);
    + file_info->StreamAllocationSize = cpu_to_le64(stream_name_len);
    +
    + next = sizeof(struct smb2_file_stream_info) + streamlen;
    + nbytes += next;
    + file_info->NextEntryOffset = cpu_to_le32(next);
    + }
    +
    + if (nbytes) {
    + file_info = (struct smb2_file_stream_info *)
    + &rsp->Buffer[nbytes];
    + streamlen = smbConvertToUTF16((__le16 *)file_info->StreamName,
    + "::$DATA", 7, conn->local_nls, 0);
    + streamlen *= 2;
    + file_info->StreamNameLength = cpu_to_le32(streamlen);
    + file_info->StreamSize = S_ISDIR(stat.mode) ? 0 :
    + cpu_to_le64(stat.size);
    + file_info->StreamAllocationSize = S_ISDIR(stat.mode) ? 0 :
    + cpu_to_le64(stat.size);
    + nbytes += sizeof(struct smb2_file_stream_info) + streamlen;
    + }
    +
    + /* last entry offset should be 0 */
    + file_info->NextEntryOffset = 0;
    +out:
    + kvfree(xattr_list);
    +
    + rsp->OutputBufferLength = cpu_to_le32(nbytes);
    + inc_rfc1001_len(rsp_org, nbytes);
    +}
    +
    +static void get_file_internal_info(struct smb2_query_info_rsp *rsp,
    + struct ksmbd_file *fp, void *rsp_org)
    +{
    + struct smb2_file_internal_info *file_info;
    + struct kstat stat;
    +
    + generic_fillattr(&init_user_ns, FP_INODE(fp), &stat);
    + file_info = (struct smb2_file_internal_info *)rsp->Buffer;
    + file_info->IndexNumber = cpu_to_le64(stat.ino);
    + rsp->OutputBufferLength =
    + cpu_to_le32(sizeof(struct smb2_file_internal_info));
    + inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_internal_info));
    +}
    +
    +static int get_file_network_open_info(struct smb2_query_info_rsp *rsp,
    + struct ksmbd_file *fp, void *rsp_org)
    +{
    + struct smb2_file_ntwrk_info *file_info;
    + struct inode *inode;
    + struct kstat stat;
    + u64 time;
    +
    + if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
    + ksmbd_err("no right to read the attributes : 0x%x\n",
    + fp->daccess);
    + return -EACCES;
    + }
    +
    + file_info = (struct smb2_file_ntwrk_info *)rsp->Buffer;
    +
    + inode = FP_INODE(fp);
    + generic_fillattr(&init_user_ns, inode, &stat);
    +
    + file_info->CreationTime = cpu_to_le64(fp->create_time);
    + time = ksmbd_UnixTimeToNT(stat.atime);
    + file_info->LastAccessTime = cpu_to_le64(time);
    + time = ksmbd_UnixTimeToNT(stat.mtime);
    + file_info->LastWriteTime = cpu_to_le64(time);
    + time = ksmbd_UnixTimeToNT(stat.ctime);
    + file_info->ChangeTime = cpu_to_le64(time);
    + file_info->Attributes = fp->f_ci->m_fattr;
    + file_info->AllocationSize =
    + cpu_to_le64(get_allocation_size(inode, &stat));
    + file_info->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
    + file_info->Reserved = cpu_to_le32(0);
    + rsp->OutputBufferLength =
    + cpu_to_le32(sizeof(struct smb2_file_ntwrk_info));
    + inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_ntwrk_info));
    + return 0;
    +}
    +
    +static void get_file_ea_info(struct smb2_query_info_rsp *rsp, void *rsp_org)
    +{
    + struct smb2_file_ea_info *file_info;
    +
    + file_info = (struct smb2_file_ea_info *)rsp->Buffer;
    + file_info->EASize = 0;
    + rsp->OutputBufferLength =
    + cpu_to_le32(sizeof(struct smb2_file_ea_info));
    + inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_ea_info));
    +}
    +
    +static void get_file_position_info(struct smb2_query_info_rsp *rsp,
    + struct ksmbd_file *fp, void *rsp_org)
    +{
    + struct smb2_file_pos_info *file_info;
    +
    + file_info = (struct smb2_file_pos_info *)rsp->Buffer;
    + file_info->CurrentByteOffset = cpu_to_le64(fp->filp->f_pos);
    + rsp->OutputBufferLength =
    + cpu_to_le32(sizeof(struct smb2_file_pos_info));
    + inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_pos_info));
    +}
    +
    +static void get_file_mode_info(struct smb2_query_info_rsp *rsp,
    + struct ksmbd_file *fp, void *rsp_org)
    +{
    + struct smb2_file_mode_info *file_info;
    +
    + file_info = (struct smb2_file_mode_info *)rsp->Buffer;
    + file_info->Mode = fp->coption & FILE_MODE_INFO_MASK;
    + rsp->OutputBufferLength =
    + cpu_to_le32(sizeof(struct smb2_file_mode_info));
    + inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_mode_info));
    +}
    +
    +static void get_file_compression_info(struct smb2_query_info_rsp *rsp,
    + struct ksmbd_file *fp, void *rsp_org)
    +{
    + struct smb2_file_comp_info *file_info;
    + struct kstat stat;
    +
    + generic_fillattr(&init_user_ns, FP_INODE(fp), &stat);
    +
    + file_info = (struct smb2_file_comp_info *)rsp->Buffer;
    + file_info->CompressedFileSize = cpu_to_le64(stat.blocks << 9);
    + file_info->CompressionFormat = COMPRESSION_FORMAT_NONE;
    + file_info->CompressionUnitShift = 0;
    + file_info->ChunkShift = 0;
    + file_info->ClusterShift = 0;
    + memset(&file_info->Reserved[0], 0, 3);
    +
    + rsp->OutputBufferLength =
    + cpu_to_le32(sizeof(struct smb2_file_comp_info));
    + inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_comp_info));
    +}
    +
    +static int get_file_attribute_tag_info(struct smb2_query_info_rsp *rsp,
    + struct ksmbd_file *fp, void *rsp_org)
    +{
    + struct smb2_file_attr_tag_info *file_info;
    +
    + if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
    + ksmbd_err("no right to read the attributes : 0x%x\n",
    + fp->daccess);
    + return -EACCES;
    + }
    +
    + file_info = (struct smb2_file_attr_tag_info *)rsp->Buffer;
    + file_info->FileAttributes = fp->f_ci->m_fattr;
    + file_info->ReparseTag = 0;
    + rsp->OutputBufferLength =
    + cpu_to_le32(sizeof(struct smb2_file_attr_tag_info));
    + inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_attr_tag_info));
    + return 0;
    +}
    +
    +static int find_file_posix_info(struct smb2_query_info_rsp *rsp,
    + struct ksmbd_file *fp, void *rsp_org)
    +{
    + struct smb311_posix_qinfo *file_info;
    + struct inode *inode = FP_INODE(fp);
    + u64 time;
    +
    + file_info = (struct smb311_posix_qinfo *)rsp->Buffer;
    + file_info->CreationTime = cpu_to_le64(fp->create_time);
    + time = ksmbd_UnixTimeToNT(inode->i_atime);
    + file_info->LastAccessTime = cpu_to_le64(time);
    + time = ksmbd_UnixTimeToNT(inode->i_mtime);
    + file_info->LastWriteTime = cpu_to_le64(time);
    + time = ksmbd_UnixTimeToNT(inode->i_ctime);
    + file_info->ChangeTime = cpu_to_le64(time);
    + file_info->DosAttributes = fp->f_ci->m_fattr;
    + file_info->Inode = cpu_to_le64(inode->i_ino);
    + file_info->EndOfFile = cpu_to_le64(inode->i_size);
    + file_info->AllocationSize = cpu_to_le64(inode->i_blocks << 9);
    + file_info->HardLinks = cpu_to_le32(inode->i_nlink);
    + file_info->Mode = cpu_to_le32(inode->i_mode);
    + file_info->DeviceId = cpu_to_le32(inode->i_rdev);
    + rsp->OutputBufferLength =
    + cpu_to_le32(sizeof(struct smb311_posix_qinfo));
    + inc_rfc1001_len(rsp_org, sizeof(struct smb311_posix_qinfo));
    + return 0;
    +}
    +
    +static int smb2_get_info_file(struct ksmbd_work *work,
    + struct smb2_query_info_req *req,
    + struct smb2_query_info_rsp *rsp, void *rsp_org)
    +{
    + struct ksmbd_file *fp;
    + int fileinfoclass = 0;
    + int rc = 0;
    + int file_infoclass_size;
    + unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
    +
    + if (test_share_config_flag(work->tcon->share_conf,
    + KSMBD_SHARE_FLAG_PIPE)) {
    + /* smb2 info file called for pipe */
    + return smb2_get_info_file_pipe(work->sess, req, rsp);
    + }
    +
    + if (work->next_smb2_rcv_hdr_off) {
    + if (!HAS_FILE_ID(le64_to_cpu(req->VolatileFileId))) {
    + ksmbd_debug(SMB, "Compound request set FID = %u\n",
    + work->compound_fid);
    + id = work->compound_fid;
    + pid = work->compound_pfid;
    + }
    + }
    +
    + if (!HAS_FILE_ID(id)) {
    + id = le64_to_cpu(req->VolatileFileId);
    + pid = le64_to_cpu(req->PersistentFileId);
    + }
    +
    + fp = ksmbd_lookup_fd_slow(work, id, pid);
    + if (!fp)
    + return -ENOENT;
    +
    + fileinfoclass = req->FileInfoClass;
    +
    + switch (fileinfoclass) {
    + case FILE_ACCESS_INFORMATION:
    + get_file_access_info(rsp, fp, rsp_org);
    + file_infoclass_size = FILE_ACCESS_INFORMATION_SIZE;
    + break;
    +
    + case FILE_BASIC_INFORMATION:
    + rc = get_file_basic_info(rsp, fp, rsp_org);
    + file_infoclass_size = FILE_BASIC_INFORMATION_SIZE;
    + break;
    +
    + case FILE_STANDARD_INFORMATION:
    + get_file_standard_info(rsp, fp, rsp_org);
    + file_infoclass_size = FILE_STANDARD_INFORMATION_SIZE;
    + break;
    +
    + case FILE_ALIGNMENT_INFORMATION:
    + get_file_alignment_info(rsp, rsp_org);
    + file_infoclass_size = FILE_ALIGNMENT_INFORMATION_SIZE;
    + break;
    +
    + case FILE_ALL_INFORMATION:
    + rc = get_file_all_info(work, rsp, fp, rsp_org);
    + file_infoclass_size = FILE_ALL_INFORMATION_SIZE;
    + break;
    +
    + case FILE_ALTERNATE_NAME_INFORMATION:
    + get_file_alternate_info(work, rsp, fp, rsp_org);
    + file_infoclass_size = FILE_ALTERNATE_NAME_INFORMATION_SIZE;
    + break;
    +
    + case FILE_STREAM_INFORMATION:
    + get_file_stream_info(work, rsp, fp, rsp_org);
    + file_infoclass_size = FILE_STREAM_INFORMATION_SIZE;
    + break;
    +
    + case FILE_INTERNAL_INFORMATION:
    + get_file_internal_info(rsp, fp, rsp_org);
    + file_infoclass_size = FILE_INTERNAL_INFORMATION_SIZE;
    + break;
    +
    + case FILE_NETWORK_OPEN_INFORMATION:
    + rc = get_file_network_open_info(rsp, fp, rsp_org);
    + file_infoclass_size = FILE_NETWORK_OPEN_INFORMATION_SIZE;
    + break;
    +
    + case FILE_EA_INFORMATION:
    + get_file_ea_info(rsp, rsp_org);
    + file_infoclass_size = FILE_EA_INFORMATION_SIZE;
    + break;
    +
    + case FILE_FULL_EA_INFORMATION:
    + rc = smb2_get_ea(work, fp, req, rsp, rsp_org);
    + file_infoclass_size = FILE_FULL_EA_INFORMATION_SIZE;
    + break;
    +
    + case FILE_POSITION_INFORMATION:
    + get_file_position_info(rsp, fp, rsp_org);
    + file_infoclass_size = FILE_POSITION_INFORMATION_SIZE;
    + break;
    +
    + case FILE_MODE_INFORMATION:
    + get_file_mode_info(rsp, fp, rsp_org);
    + file_infoclass_size = FILE_MODE_INFORMATION_SIZE;
    + break;
    +
    + case FILE_COMPRESSION_INFORMATION:
    + get_file_compression_info(rsp, fp, rsp_org);
    + file_infoclass_size = FILE_COMPRESSION_INFORMATION_SIZE;
    + break;
    +
    + case FILE_ATTRIBUTE_TAG_INFORMATION:
    + rc = get_file_attribute_tag_info(rsp, fp, rsp_org);
    + file_infoclass_size = FILE_ATTRIBUTE_TAG_INFORMATION_SIZE;
    + break;
    + case SMB_FIND_FILE_POSIX_INFO:
    + if (!work->tcon->posix_extensions) {
    + ksmbd_err("client doesn't negotiate with SMB3.1.1 POSIX Extensions\n");
    + rc = -EOPNOTSUPP;
    + } else {
    + rc = find_file_posix_info(rsp, fp, rsp_org);
    + file_infoclass_size = sizeof(struct smb311_posix_qinfo);
    + }
    + break;
    + default:
    + ksmbd_debug(SMB, "fileinfoclass %d not supported yet\n",
    + fileinfoclass);
    + rc = -EOPNOTSUPP;
    + }
    + if (!rc)
    + rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
    + rsp,
    + file_infoclass_size);
    + ksmbd_fd_put(work, fp);
    + return rc;
    +}
    +
    +static int smb2_get_info_filesystem(struct ksmbd_work *work,
    + struct smb2_query_info_req *req,
    + struct smb2_query_info_rsp *rsp, void *rsp_org)
    +{
    + struct ksmbd_session *sess = work->sess;
    + struct ksmbd_conn *conn = sess->conn;
    + struct ksmbd_share_config *share = work->tcon->share_conf;
    + int fsinfoclass = 0;
    + struct kstatfs stfs;
    + struct path path;
    + int rc = 0, len;
    + int fs_infoclass_size = 0;
    + int lookup_flags = 0;
    +
    + if (test_share_config_flag(share, KSMBD_SHARE_FLAG_FOLLOW_SYMLINKS))
    + lookup_flags = LOOKUP_FOLLOW;
    +
    + rc = ksmbd_vfs_kern_path(share->path, lookup_flags, &path, 0);
    + if (rc) {
    + ksmbd_err("cannot create vfs path\n");
    + return -EIO;
    + }
    +
    + rc = vfs_statfs(&path, &stfs);
    + if (rc) {
    + ksmbd_err("cannot do stat of path %s\n", share->path);
    + path_put(&path);
    + return -EIO;
    + }
    +
    + fsinfoclass = req->FileInfoClass;
    +
    + switch (fsinfoclass) {
    + case FS_DEVICE_INFORMATION:
    + {
    + struct filesystem_device_info *info;
    +
    + info = (struct filesystem_device_info *)rsp->Buffer;
    +
    + info->DeviceType = cpu_to_le32(stfs.f_type);
    + info->DeviceCharacteristics = cpu_to_le32(0x00000020);
    + rsp->OutputBufferLength = cpu_to_le32(8);
    + inc_rfc1001_len(rsp_org, 8);
    + fs_infoclass_size = FS_DEVICE_INFORMATION_SIZE;
    + break;
    + }
    + case FS_ATTRIBUTE_INFORMATION:
    + {
    + struct filesystem_attribute_info *info;
    + size_t sz;
    +
    + info = (struct filesystem_attribute_info *)rsp->Buffer;
    + info->Attributes = cpu_to_le32(FILE_SUPPORTS_OBJECT_IDS |
    + FILE_PERSISTENT_ACLS |
    + FILE_UNICODE_ON_DISK |
    + FILE_CASE_PRESERVED_NAMES |
    + FILE_CASE_SENSITIVE_SEARCH |
    + FILE_SUPPORTS_BLOCK_REFCOUNTING);
    +
    + info->Attributes |= cpu_to_le32(server_conf.share_fake_fscaps);
    +
    + info->MaxPathNameComponentLength = cpu_to_le32(stfs.f_namelen);
    + len = smbConvertToUTF16((__le16 *)info->FileSystemName,
    + "NTFS", PATH_MAX, conn->local_nls, 0);
    + len = len * 2;
    + info->FileSystemNameLen = cpu_to_le32(len);
    + sz = sizeof(struct filesystem_attribute_info) - 2 + len;
    + rsp->OutputBufferLength = cpu_to_le32(sz);
    + inc_rfc1001_len(rsp_org, sz);
    + fs_infoclass_size = FS_ATTRIBUTE_INFORMATION_SIZE;
    + break;
    + }
    + case FS_VOLUME_INFORMATION:
    + {
    + struct filesystem_vol_info *info;
    + size_t sz;
    +
    + info = (struct filesystem_vol_info *)(rsp->Buffer);
    + info->VolumeCreationTime = 0;
    + /* Taking dummy value of serial number*/
    + info->SerialNumber = cpu_to_le32(0xbc3ac512);
    + len = smbConvertToUTF16((__le16 *)info->VolumeLabel,
    + share->name, PATH_MAX,
    + conn->local_nls, 0);
    + len = len * 2;
    + info->VolumeLabelSize = cpu_to_le32(len);
    + info->Reserved = 0;
    + sz = sizeof(struct filesystem_vol_info) - 2 + len;
    + rsp->OutputBufferLength = cpu_to_le32(sz);
    + inc_rfc1001_len(rsp_org, sz);
    + fs_infoclass_size = FS_VOLUME_INFORMATION_SIZE;
    + break;
    + }
    + case FS_SIZE_INFORMATION:
    + {
    + struct filesystem_info *info;
    + unsigned short logical_sector_size;
    +
    + info = (struct filesystem_info *)(rsp->Buffer);
    + logical_sector_size =
    + ksmbd_vfs_logical_sector_size(d_inode(path.dentry));
    +
    + info->TotalAllocationUnits = cpu_to_le64(stfs.f_blocks);
    + info->FreeAllocationUnits = cpu_to_le64(stfs.f_bfree);
    + info->SectorsPerAllocationUnit = cpu_to_le32(stfs.f_bsize >> 9);
    + info->BytesPerSector = cpu_to_le32(logical_sector_size);
    + rsp->OutputBufferLength = cpu_to_le32(24);
    + inc_rfc1001_len(rsp_org, 24);
    + fs_infoclass_size = FS_SIZE_INFORMATION_SIZE;
    + break;
    + }
    + case FS_FULL_SIZE_INFORMATION:
    + {
    + struct smb2_fs_full_size_info *info;
    + unsigned short logical_sector_size;
    +
    + info = (struct smb2_fs_full_size_info *)(rsp->Buffer);
    + logical_sector_size =
    + ksmbd_vfs_logical_sector_size(d_inode(path.dentry));
    +
    + info->TotalAllocationUnits = cpu_to_le64(stfs.f_blocks);
    + info->CallerAvailableAllocationUnits =
    + cpu_to_le64(stfs.f_bavail);
    + info->ActualAvailableAllocationUnits =
    + cpu_to_le64(stfs.f_bfree);
    + info->SectorsPerAllocationUnit = cpu_to_le32(stfs.f_bsize >> 9);
    + info->BytesPerSector = cpu_to_le32(logical_sector_size);
    + rsp->OutputBufferLength = cpu_to_le32(32);
    + inc_rfc1001_len(rsp_org, 32);
    + fs_infoclass_size = FS_FULL_SIZE_INFORMATION_SIZE;
    + break;
    + }
    + case FS_OBJECT_ID_INFORMATION:
    + {
    + struct object_id_info *info;
    +
    + info = (struct object_id_info *)(rsp->Buffer);
    +
    + if (!user_guest(sess->user))
    + memcpy(info->objid, user_passkey(sess->user), 16);
    + else
    + memset(info->objid, 0, 16);
    +
    + info->extended_info.magic = cpu_to_le32(EXTENDED_INFO_MAGIC);
    + info->extended_info.version = cpu_to_le32(1);
    + info->extended_info.release = cpu_to_le32(1);
    + info->extended_info.rel_date = 0;
    + memcpy(info->extended_info.version_string, "1.1.0", strlen("1.1.0"));
    + rsp->OutputBufferLength = cpu_to_le32(64);
    + inc_rfc1001_len(rsp_org, 64);
    + fs_infoclass_size = FS_OBJECT_ID_INFORMATION_SIZE;
    + break;
    + }
    + case FS_SECTOR_SIZE_INFORMATION:
    + {
    + struct smb3_fs_ss_info *info;
    + struct ksmbd_fs_sector_size fs_ss;
    +
    + info = (struct smb3_fs_ss_info *)(rsp->Buffer);
    + ksmbd_vfs_smb2_sector_size(d_inode(path.dentry), &fs_ss);
    +
    + info->LogicalBytesPerSector =
    + cpu_to_le32(fs_ss.logical_sector_size);
    + info->PhysicalBytesPerSectorForAtomicity =
    + cpu_to_le32(fs_ss.physical_sector_size);
    + info->PhysicalBytesPerSectorForPerf =
    + cpu_to_le32(fs_ss.optimal_io_size);
    + info->FSEffPhysicalBytesPerSectorForAtomicity =
    + cpu_to_le32(fs_ss.optimal_io_size);
    + info->Flags = cpu_to_le32(SSINFO_FLAGS_ALIGNED_DEVICE |
    + SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE);
    + info->ByteOffsetForSectorAlignment = 0;
    + info->ByteOffsetForPartitionAlignment = 0;
    + rsp->OutputBufferLength = cpu_to_le32(28);
    + inc_rfc1001_len(rsp_org, 28);
    + fs_infoclass_size = FS_SECTOR_SIZE_INFORMATION_SIZE;
    + break;
    + }
    + case FS_CONTROL_INFORMATION:
    + {
    + /*
    + * TODO : The current implementation is based on
    + * test result with win7(NTFS) server. It's need to
    + * modify this to get valid Quota values
    + * from Linux kernel
    + */
    + struct smb2_fs_control_info *info;
    +
    + info = (struct smb2_fs_control_info *)(rsp->Buffer);
    + info->FreeSpaceStartFiltering = 0;
    + info->FreeSpaceThreshold = 0;
    + info->FreeSpaceStopFiltering = 0;
    + info->DefaultQuotaThreshold = cpu_to_le64(SMB2_NO_FID);
    + info->DefaultQuotaLimit = cpu_to_le64(SMB2_NO_FID);
    + info->Padding = 0;
    + rsp->OutputBufferLength = cpu_to_le32(48);
    + inc_rfc1001_len(rsp_org, 48);
    + fs_infoclass_size = FS_CONTROL_INFORMATION_SIZE;
    + break;
    + }
    + case FS_POSIX_INFORMATION:
    + {
    + struct filesystem_posix_info *info;
    + unsigned short logical_sector_size;
    +
    + if (!work->tcon->posix_extensions) {
    + ksmbd_err("client doesn't negotiate with SMB3.1.1 POSIX Extensions\n");
    + rc = -EOPNOTSUPP;
    + } else {
    + info = (struct filesystem_posix_info *)(rsp->Buffer);
    + logical_sector_size =
    + ksmbd_vfs_logical_sector_size(d_inode(path.dentry));
    + info->OptimalTransferSize = cpu_to_le32(logical_sector_size);
    + info->BlockSize = cpu_to_le32(stfs.f_bsize);
    + info->TotalBlocks = cpu_to_le64(stfs.f_blocks);
    + info->BlocksAvail = cpu_to_le64(stfs.f_bfree);
    + info->UserBlocksAvail = cpu_to_le64(stfs.f_bavail);
    + info->TotalFileNodes = cpu_to_le64(stfs.f_files);
    + info->FreeFileNodes = cpu_to_le64(stfs.f_ffree);
    + rsp->OutputBufferLength = cpu_to_le32(56);
    + inc_rfc1001_len(rsp_org, 56);
    + fs_infoclass_size = FS_POSIX_INFORMATION_SIZE;
    + }
    + break;
    + }
    + default:
    + path_put(&path);
    + return -EOPNOTSUPP;
    + }
    + rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
    + rsp,
    + fs_infoclass_size);
    + path_put(&path);
    + return rc;
    +}
    +
    +static int smb2_get_info_sec(struct ksmbd_work *work,
    + struct smb2_query_info_req *req,
    + struct smb2_query_info_rsp *rsp, void *rsp_org)
    +{
    + struct ksmbd_file *fp;
    + struct smb_ntsd *pntsd = (struct smb_ntsd *)rsp->Buffer, *ppntsd = NULL;
    + struct smb_fattr fattr = {{0}};
    + struct inode *inode;
    + __u32 secdesclen;
    + unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
    + int addition_info = le32_to_cpu(req->AdditionalInformation);
    + int rc;
    +
    + if (addition_info & ~(OWNER_SECINFO | GROUP_SECINFO | DACL_SECINFO)) {
    + ksmbd_debug(SMB, "Unsupported addition info: 0x%x)\n",
    + addition_info);
    +
    + pntsd->revision = cpu_to_le16(1);
    + pntsd->type = cpu_to_le16(SELF_RELATIVE | DACL_PROTECTED);
    + pntsd->osidoffset = 0;
    + pntsd->gsidoffset = 0;
    + pntsd->sacloffset = 0;
    + pntsd->dacloffset = 0;
    +
    + secdesclen = sizeof(struct smb_ntsd);
    + rsp->OutputBufferLength = cpu_to_le32(secdesclen);
    + inc_rfc1001_len(rsp_org, secdesclen);
    +
    + return 0;
    + }
    +
    + if (work->next_smb2_rcv_hdr_off) {
    + if (!HAS_FILE_ID(le64_to_cpu(req->VolatileFileId))) {
    + ksmbd_debug(SMB, "Compound request set FID = %u\n",
    + work->compound_fid);
    + id = work->compound_fid;
    + pid = work->compound_pfid;
    + }
    + }
    +
    + if (!HAS_FILE_ID(id)) {
    + id = le64_to_cpu(req->VolatileFileId);
    + pid = le64_to_cpu(req->PersistentFileId);
    + }
    +
    + fp = ksmbd_lookup_fd_slow(work, id, pid);
    + if (!fp)
    + return -ENOENT;
    +
    + inode = FP_INODE(fp);
    + ksmbd_acls_fattr(&fattr, inode);
    +
    + if (test_share_config_flag(work->tcon->share_conf,
    + KSMBD_SHARE_FLAG_ACL_XATTR))
    + ksmbd_vfs_get_sd_xattr(work->conn, fp->filp->f_path.dentry, &ppntsd);
    +
    + rc = build_sec_desc(pntsd, ppntsd, addition_info, &secdesclen, &fattr);
    + posix_acl_release(fattr.cf_acls);
    + posix_acl_release(fattr.cf_dacls);
    + kfree(ppntsd);
    + ksmbd_fd_put(work, fp);
    + if (rc)
    + return rc;
    +
    + rsp->OutputBufferLength = cpu_to_le32(secdesclen);
    + inc_rfc1001_len(rsp_org, secdesclen);
    + return 0;
    +}
    +
    +/**
    + * smb2_query_info() - handler for smb2 query info command
    + * @work: smb work containing query info request buffer
    + *
    + * Return: 0 on success, otherwise error
    + */
    +int smb2_query_info(struct ksmbd_work *work)
    +{
    + struct smb2_query_info_req *req;
    + struct smb2_query_info_rsp *rsp, *rsp_org;
    + int rc = 0;
    +
    + rsp_org = work->response_buf;
    + WORK_BUFFERS(work, req, rsp);
    +
    + ksmbd_debug(SMB, "GOT query info request\n");
    +
    + switch (req->InfoType) {
    + case SMB2_O_INFO_FILE:
    + ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILE\n");
    + rc = smb2_get_info_file(work, req, rsp, (void *)rsp_org);
    + break;
    + case SMB2_O_INFO_FILESYSTEM:
    + ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILESYSTEM\n");
    + rc = smb2_get_info_filesystem(work, req, rsp, (void *)rsp_org);
    + break;
    + case SMB2_O_INFO_SECURITY:
    + ksmbd_debug(SMB, "GOT SMB2_O_INFO_SECURITY\n");
    + rc = smb2_get_info_sec(work, req, rsp, (void *)rsp_org);
    + break;
    + default:
    + ksmbd_debug(SMB, "InfoType %d not supported yet\n",
    + req->InfoType);
    + rc = -EOPNOTSUPP;
    + }
    +
    + if (rc < 0) {
    + if (rc == -EACCES)
    + rsp->hdr.Status = STATUS_ACCESS_DENIED;
    + else if (rc == -ENOENT)
    + rsp->hdr.Status = STATUS_FILE_CLOSED;
    + else if (rc == -EIO)
    + rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
    + else if (rc == -EOPNOTSUPP || rsp->hdr.Status == 0)
    + rsp->hdr.Status = STATUS_INVALID_INFO_CLASS;
    + smb2_set_err_rsp(work);
    +
    + ksmbd_debug(SMB, "error while processing smb2 query rc = %d\n",
    + rc);
    + return rc;
    + }
    + rsp->StructureSize = cpu_to_le16(9);
    + rsp->OutputBufferOffset = cpu_to_le16(72);
    + inc_rfc1001_len(rsp_org, 8);
    + return 0;
    +}
    +
    +/**
    + * smb2_close_pipe() - handler for closing IPC pipe
    + * @work: smb work containing close request buffer
    + *
    + * Return: 0
    + */
    +static noinline int smb2_close_pipe(struct ksmbd_work *work)
    +{
    + u64 id;
    + struct smb2_close_req *req = work->request_buf;
    + struct smb2_close_rsp *rsp = work->response_buf;
    +
    + id = le64_to_cpu(req->VolatileFileId);
    + ksmbd_session_rpc_close(work->sess, id);
    +
    + rsp->StructureSize = cpu_to_le16(60);
    + rsp->Flags = 0;
    + rsp->Reserved = 0;
    + rsp->CreationTime = 0;
    + rsp->LastAccessTime = 0;
    + rsp->LastWriteTime = 0;
    + rsp->ChangeTime = 0;
    + rsp->AllocationSize = 0;
    + rsp->EndOfFile = 0;
    + rsp->Attributes = 0;
    + inc_rfc1001_len(rsp, 60);
    + return 0;
    +}
    +
    +/**
    + * smb2_close() - handler for smb2 close file command
    + * @work: smb work containing close request buffer
    + *
    + * Return: 0
    + */
    +int smb2_close(struct ksmbd_work *work)
    +{
    + unsigned int volatile_id = KSMBD_NO_FID;
    + u64 sess_id;
    + struct smb2_close_req *req;
    + struct smb2_close_rsp *rsp;
    + struct smb2_close_rsp *rsp_org;
    + struct ksmbd_conn *conn = work->conn;
    + struct ksmbd_file *fp;
    + struct inode *inode;
    + u64 time;
    + int err = 0;
    +
    + rsp_org = work->response_buf;
    + WORK_BUFFERS(work, req, rsp);
    +
    + if (test_share_config_flag(work->tcon->share_conf,
    + KSMBD_SHARE_FLAG_PIPE)) {
    + ksmbd_debug(SMB, "IPC pipe close request\n");
    + return smb2_close_pipe(work);
    + }
    +
    + sess_id = le64_to_cpu(req->hdr.SessionId);
    + if (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)
    + sess_id = work->compound_sid;
    +
    + work->compound_sid = 0;
    + if (check_session_id(conn, sess_id)) {
    + work->compound_sid = sess_id;
    + } else {
    + rsp->hdr.Status = STATUS_USER_SESSION_DELETED;
    + if (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)
    + rsp->hdr.Status = STATUS_INVALID_PARAMETER;
    + err = -EBADF;
    + goto out;
    + }
    +
    + if (work->next_smb2_rcv_hdr_off &&
    + !HAS_FILE_ID(le64_to_cpu(req->VolatileFileId))) {
    + if (!HAS_FILE_ID(work->compound_fid)) {
    + /* file already closed, return FILE_CLOSED */
    + ksmbd_debug(SMB, "file already closed\n");
    + rsp->hdr.Status = STATUS_FILE_CLOSED;
    + err = -EBADF;
    + goto out;
    + } else {
    + ksmbd_debug(SMB, "Compound request set FID = %u:%u\n",
    + work->compound_fid,
    + work->compound_pfid);
    + volatile_id = work->compound_fid;
    +
    + /* file closed, stored id is not valid anymore */
    + work->compound_fid = KSMBD_NO_FID;
    + work->compound_pfid = KSMBD_NO_FID;
    + }
    + } else {
    + volatile_id = le64_to_cpu(req->VolatileFileId);
    + }
    + ksmbd_debug(SMB, "volatile_id = %u\n", volatile_id);
    +
    + rsp->StructureSize = cpu_to_le16(60);
    + rsp->Reserved = 0;
    +
    + if (req->Flags == SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB) {
    + fp = ksmbd_lookup_fd_fast(work, volatile_id);
    + if (!fp) {
    + err = -ENOENT;
    + goto out;
    + }
    +
    + inode = FP_INODE(fp);
    + rsp->Flags = SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB;
    + rsp->AllocationSize = S_ISDIR(inode->i_mode) ? 0 :
    + cpu_to_le64(inode->i_blocks << 9);
    + rsp->EndOfFile = cpu_to_le64(inode->i_size);
    + rsp->Attributes = fp->f_ci->m_fattr;
    + rsp->CreationTime = cpu_to_le64(fp->create_time);
    + time = ksmbd_UnixTimeToNT(inode->i_atime);
    + rsp->LastAccessTime = cpu_to_le64(time);
    + time = ksmbd_UnixTimeToNT(inode->i_mtime);
    + rsp->LastWriteTime = cpu_to_le64(time);
    + time = ksmbd_UnixTimeToNT(inode->i_ctime);
    + rsp->ChangeTime = cpu_to_le64(time);
    + ksmbd_fd_put(work, fp);
    + } else {
    + rsp->Flags = 0;
    + rsp->AllocationSize = 0;
    + rsp->EndOfFile = 0;
    + rsp->Attributes = 0;
    + rsp->CreationTime = 0;
    + rsp->LastAccessTime = 0;
    + rsp->LastWriteTime = 0;
    + rsp->ChangeTime = 0;
    + }
    +
    + err = ksmbd_close_fd(work, volatile_id);
    +out:
    + if (err) {
    + if (rsp->hdr.Status == 0)
    + rsp->hdr.Status = STATUS_FILE_CLOSED;
    + smb2_set_err_rsp(work);
    + } else {
    + inc_rfc1001_len(rsp_org, 60);
    + }
    +
    + return 0;
    +}
    +
    +/**
    + * smb2_echo() - handler for smb2 echo(ping) command
    + * @work: smb work containing echo request buffer
    + *
    + * Return: 0
    + */
    +int smb2_echo(struct ksmbd_work *work)
    +{
    + struct smb2_echo_rsp *rsp = work->response_buf;
    +
    + rsp->StructureSize = cpu_to_le16(4);
    + rsp->Reserved = 0;
    + inc_rfc1001_len(rsp, 4);
    + return 0;
    +}
    +
    +static int smb2_rename(struct ksmbd_work *work, struct ksmbd_file *fp,
    + struct smb2_file_rename_info *file_info,
    + struct nls_table *local_nls)
    +{
    + struct ksmbd_share_config *share = fp->tcon->share_conf;
    + char *new_name = NULL, *abs_oldname = NULL, *old_name = NULL;
    + char *pathname = NULL;
    + struct path path;
    + bool file_present = true;
    + int rc;
    +
    + ksmbd_debug(SMB, "setting FILE_RENAME_INFO\n");
    + pathname = kmalloc(PATH_MAX, GFP_KERNEL);
    + if (!pathname)
    + return -ENOMEM;
    +
    + abs_oldname = d_path(&fp->filp->f_path, pathname, PATH_MAX);
    + if (IS_ERR(abs_oldname)) {
    + rc = -EINVAL;
    + goto out;
    + }
    + old_name = strrchr(abs_oldname, '/');
    + if (old_name && old_name[1] != '\0') {
    + old_name++;
    + } else {
    + ksmbd_debug(SMB, "can't get last component in path %s\n",
    + abs_oldname);
    + rc = -ENOENT;
    + goto out;
    + }
    +
    + new_name = smb2_get_name(share,
    + file_info->FileName,
    + le32_to_cpu(file_info->FileNameLength),
    + local_nls);
    + if (IS_ERR(new_name)) {
    + rc = PTR_ERR(new_name);
    + goto out;
    + }
    +
    + if (strchr(new_name, ':')) {
    + int s_type;
    + char *xattr_stream_name, *stream_name = NULL;
    + size_t xattr_stream_size;
    + int len;
    +
    + rc = parse_stream_name(new_name, &stream_name, &s_type);
    + if (rc < 0)
    + goto out;
    +
    + len = strlen(new_name);
    + if (new_name[len - 1] != '/') {
    + ksmbd_err("not allow base filename in rename\n");
    + rc = -ESHARE;
    + goto out;
    + }
    +
    + rc = ksmbd_vfs_xattr_stream_name(stream_name,
    + &xattr_stream_name,
    + &xattr_stream_size,
    + s_type);
    + if (rc)
    + goto out;
    +
    + rc = ksmbd_vfs_setxattr(fp->filp->f_path.dentry,
    + xattr_stream_name,
    + NULL, 0, 0);
    + if (rc < 0) {
    + ksmbd_err("failed to store stream name in xattr: %d\n",
    + rc);
    + rc = -EINVAL;
    + goto out;
    + }
    +
    + goto out;
    + }
    +
    + ksmbd_debug(SMB, "new name %s\n", new_name);
    + rc = ksmbd_vfs_kern_path(new_name, 0, &path, 1);
    + if (rc)
    + file_present = false;
    + else
    + path_put(&path);
    +
    + if (ksmbd_share_veto_filename(share, new_name)) {
    + rc = -ENOENT;
    + ksmbd_debug(SMB, "Can't rename vetoed file: %s\n", new_name);
    + goto out;
    + }
    +
    + if (file_info->ReplaceIfExists) {
    + if (file_present) {
    + rc = ksmbd_vfs_remove_file(work, new_name);
    + if (rc) {
    + if (rc != -ENOTEMPTY)
    + rc = -EINVAL;
    + ksmbd_debug(SMB, "cannot delete %s, rc %d\n",
    + new_name, rc);
    + goto out;
    + }
    + }
    + } else {
    + if (file_present &&
    + strncmp(old_name, path.dentry->d_name.name, strlen(old_name))) {
    + rc = -EEXIST;
    + ksmbd_debug(SMB,
    + "cannot rename already existing file\n");
    + goto out;
    + }
    + }
    +
    + rc = ksmbd_vfs_fp_rename(work, fp, new_name);
    +out:
    + kfree(pathname);
    + if (!IS_ERR(new_name))
    + kfree(new_name);
    + return rc;
    +}
    +
    +static int smb2_create_link(struct ksmbd_work *work,
    + struct ksmbd_share_config *share,
    + struct smb2_file_link_info *file_info,
    + struct file *filp,
    + struct nls_table *local_nls)
    +{
    + char *link_name = NULL, *target_name = NULL, *pathname = NULL;
    + struct path path;
    + bool file_present = true;
    + int rc;
    +
    + ksmbd_debug(SMB, "setting FILE_LINK_INFORMATION\n");
    + pathname = kmalloc(PATH_MAX, GFP_KERNEL);
    + if (!pathname)
    + return -ENOMEM;
    +
    + link_name = smb2_get_name(share,
    + file_info->FileName,
    + le32_to_cpu(file_info->FileNameLength),
    + local_nls);
    + if (IS_ERR(link_name) || S_ISDIR(file_inode(filp)->i_mode)) {
    + rc = -EINVAL;
    + goto out;
    + }
    +
    + ksmbd_debug(SMB, "link name is %s\n", link_name);
    + target_name = d_path(&filp->f_path, pathname, PATH_MAX);
    + if (IS_ERR(target_name)) {
    + rc = -EINVAL;
    + goto out;
    + }
    +
    + ksmbd_debug(SMB, "target name is %s\n", target_name);
    + rc = ksmbd_vfs_kern_path(link_name, 0, &path, 0);
    + if (rc)
    + file_present = false;
    + else
    + path_put(&path);
    +
    + if (file_info->ReplaceIfExists) {
    + if (file_present) {
    + rc = ksmbd_vfs_remove_file(work, link_name);
    + if (rc) {
    + rc = -EINVAL;
    + ksmbd_debug(SMB, "cannot delete %s\n",
    + link_name);
    + goto out;
    + }
    + }
    + } else {
    + if (file_present) {
    + rc = -EEXIST;
    + ksmbd_debug(SMB, "link already exists\n");
    + goto out;
    + }
    + }
    +
    + rc = ksmbd_vfs_link(work, target_name, link_name);
    + if (rc)
    + rc = -EINVAL;
    +out:
    + if (!IS_ERR(link_name))
    + kfree(link_name);
    + kfree(pathname);
    + return rc;
    +}
    +
    +static int set_file_basic_info(struct ksmbd_file *fp, char *buf,
    + struct ksmbd_share_config *share)
    +{
    + struct smb2_file_all_info *file_info;
    + struct iattr attrs;
    + struct iattr temp_attrs;
    + struct file *filp;
    + struct inode *inode;
    + int rc;
    +
    + if (!(fp->daccess & FILE_WRITE_ATTRIBUTES_LE))
    + return -EACCES;
    +
    + file_info = (struct smb2_file_all_info *)buf;
    + attrs.ia_valid = 0;
    + filp = fp->filp;
    + inode = file_inode(filp);
    +
    + if (file_info->CreationTime)
    + fp->create_time = le64_to_cpu(file_info->CreationTime);
    +
    + if (file_info->LastAccessTime) {
    + attrs.ia_atime = ksmbd_NTtimeToUnix(file_info->LastAccessTime);
    + attrs.ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
    + }
    +
    + if (file_info->ChangeTime) {
    + temp_attrs.ia_ctime = ksmbd_NTtimeToUnix(file_info->ChangeTime);
    + attrs.ia_ctime = temp_attrs.ia_ctime;
    + attrs.ia_valid |= ATTR_CTIME;
    + } else {
    + temp_attrs.ia_ctime = inode->i_ctime;
    + }
    +
    + if (file_info->LastWriteTime) {
    + attrs.ia_mtime = ksmbd_NTtimeToUnix(file_info->LastWriteTime);
    + attrs.ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
    + }
    +
    + if (file_info->Attributes) {
    + if (!S_ISDIR(inode->i_mode) &&
    + file_info->Attributes & ATTR_DIRECTORY_LE) {
    + ksmbd_err("can't change a file to a directory\n");
    + return -EINVAL;
    + }
    +
    + if (!(S_ISDIR(inode->i_mode) && file_info->Attributes == ATTR_NORMAL_LE))
    + fp->f_ci->m_fattr = file_info->Attributes |
    + (fp->f_ci->m_fattr & ATTR_DIRECTORY_LE);
    + }
    +
    + if (test_share_config_flag(share, KSMBD_SHARE_FLAG_STORE_DOS_ATTRS) &&
    + (file_info->CreationTime || file_info->Attributes)) {
    + struct xattr_dos_attrib da = {0};
    +
    + da.version = 4;
    + da.itime = fp->itime;
    + da.create_time = fp->create_time;
    + da.attr = le32_to_cpu(fp->f_ci->m_fattr);
    + da.flags = XATTR_DOSINFO_ATTRIB | XATTR_DOSINFO_CREATE_TIME |
    + XATTR_DOSINFO_ITIME;
    +
    + rc = ksmbd_vfs_set_dos_attrib_xattr(filp->f_path.dentry, &da);
    + if (rc)
    + ksmbd_debug(SMB,
    + "failed to restore file attribute in EA\n");
    + rc = 0;
    + }
    +
    + /*
    + * HACK : set ctime here to avoid ctime changed
    + * when file_info->ChangeTime is zero.
    + */
    + attrs.ia_ctime = temp_attrs.ia_ctime;
    + attrs.ia_valid |= ATTR_CTIME;
    +
    + if (attrs.ia_valid) {
    + struct dentry *dentry = filp->f_path.dentry;
    + struct inode *inode = d_inode(dentry);
    +
    + if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
    + return -EACCES;
    +
    + rc = setattr_prepare(&init_user_ns, dentry, &attrs);
    + if (rc)
    + return -EINVAL;
    +
    + inode_lock(inode);
    + setattr_copy(&init_user_ns, inode, &attrs);
    + attrs.ia_valid &= ~ATTR_CTIME;
    + rc = notify_change(&init_user_ns, dentry, &attrs, NULL);
    + inode_unlock(inode);
    + }
    + return 0;
    +}
    +
    +static int set_file_allocation_info(struct ksmbd_work *work,
    + struct ksmbd_file *fp, char *buf)
    +{
    + /*
    + * TODO : It's working fine only when store dos attributes
    + * is not yes. need to implement a logic which works
    + * properly with any smb.conf option
    + */
    +
    + struct smb2_file_alloc_info *file_alloc_info;
    + loff_t alloc_blks;
    + struct inode *inode;
    + int rc;
    +
    + if (!(fp->daccess & FILE_WRITE_DATA_LE))
    + return -EACCES;
    +
    + file_alloc_info = (struct smb2_file_alloc_info *)buf;
    + alloc_blks = (le64_to_cpu(file_alloc_info->AllocationSize) + 511) >> 9;
    + inode = file_inode(fp->filp);
    +
    + if (alloc_blks > inode->i_blocks) {
    + rc = ksmbd_vfs_alloc_size(work, fp, alloc_blks * 512);
    + if (rc && rc != -EOPNOTSUPP) {
    + ksmbd_err("ksmbd_vfs_alloc_size is failed : %d\n", rc);
    + return rc;
    + }
    + } else if (alloc_blks < inode->i_blocks) {
    + loff_t size;
    +
    + /*
    + * Allocation size could be smaller than original one
    + * which means allocated blocks in file should be
    + * deallocated. use truncate to cut out it, but inode
    + * size is also updated with truncate offset.
    + * inode size is retained by backup inode size.
    + */
    + size = i_size_read(inode);
    + rc = ksmbd_vfs_truncate(work, NULL, fp, alloc_blks * 512);
    + if (rc) {
    + ksmbd_err("truncate failed! filename : %s, err %d\n",
    + fp->filename, rc);
    + return rc;
    + }
    + if (size < alloc_blks * 512)
    + i_size_write(inode, size);
    + }
    + return 0;
    +}
    +
    +static int set_end_of_file_info(struct ksmbd_work *work, struct ksmbd_file *fp,
    + char *buf)
    +{
    + struct smb2_file_eof_info *file_eof_info;
    + loff_t newsize;
    + struct inode *inode;
    + int rc;
    +
    + if (!(fp->daccess & FILE_WRITE_DATA_LE))
    + return -EACCES;
    +
    + file_eof_info = (struct smb2_file_eof_info *)buf;
    + newsize = le64_to_cpu(file_eof_info->EndOfFile);
    + inode = file_inode(fp->filp);
    +
    + /*
    + * If FILE_END_OF_FILE_INFORMATION of set_info_file is called
    + * on FAT32 shared device, truncate execution time is too long
    + * and network error could cause from windows client. because
    + * truncate of some filesystem like FAT32 fill zero data in
    + * truncated range.
    + */
    + if (inode->i_sb->s_magic != MSDOS_SUPER_MAGIC) {
    + ksmbd_debug(SMB, "filename : %s truncated to newsize %lld\n",
    + fp->filename, newsize);
    + rc = ksmbd_vfs_truncate(work, NULL, fp, newsize);
    + if (rc) {
    + ksmbd_debug(SMB, "truncate failed! filename : %s err %d\n",
    + fp->filename, rc);
    + if (rc != -EAGAIN)
    + rc = -EBADF;
    + return rc;
    + }
    + }
    + return 0;
    +}
    +
    +static int set_rename_info(struct ksmbd_work *work, struct ksmbd_file *fp,
    + char *buf)
    +{
    + struct ksmbd_file *parent_fp;
    +
    + if (!(fp->daccess & FILE_DELETE_LE)) {
    + ksmbd_err("no right to delete : 0x%x\n", fp->daccess);
    + return -EACCES;
    + }
    +
    + if (ksmbd_stream_fd(fp))
    + goto next;
    +
    + parent_fp = ksmbd_lookup_fd_inode(PARENT_INODE(fp));
    + if (parent_fp) {
    + if (parent_fp->daccess & FILE_DELETE_LE) {
    + ksmbd_err("parent dir is opened with delete access\n");
    + return -ESHARE;
    + }
    + }
    +next:
    + return smb2_rename(work, fp,
    + (struct smb2_file_rename_info *)buf,
    + work->sess->conn->local_nls);
    +}
    +
    +static int set_file_disposition_info(struct ksmbd_file *fp, char *buf)
    +{
    + struct smb2_file_disposition_info *file_info;
    + struct inode *inode;
    +
    + if (!(fp->daccess & FILE_DELETE_LE)) {
    + ksmbd_err("no right to delete : 0x%x\n", fp->daccess);
    + return -EACCES;
    + }
    +
    + inode = file_inode(fp->filp);
    + file_info = (struct smb2_file_disposition_info *)buf;
    + if (file_info->DeletePending) {
    + if (S_ISDIR(inode->i_mode) &&
    + ksmbd_vfs_empty_dir(fp) == -ENOTEMPTY)
    + return -EBUSY;
    + ksmbd_set_inode_pending_delete(fp);
    + } else {
    + ksmbd_clear_inode_pending_delete(fp);
    + }
    + return 0;
    +}
    +
    +static int set_file_position_info(struct ksmbd_file *fp, char *buf)
    +{
    + struct smb2_file_pos_info *file_info;
    + loff_t current_byte_offset;
    + unsigned short sector_size;
    + struct inode *inode;
    +
    + inode = file_inode(fp->filp);
    + file_info = (struct smb2_file_pos_info *)buf;
    + current_byte_offset = le64_to_cpu(file_info->CurrentByteOffset);
    + sector_size = ksmbd_vfs_logical_sector_size(inode);
    +
    + if (current_byte_offset < 0 ||
    + (fp->coption == FILE_NO_INTERMEDIATE_BUFFERING_LE &&
    + current_byte_offset & (sector_size - 1))) {
    + ksmbd_err("CurrentByteOffset is not valid : %llu\n",
    + current_byte_offset);
    + return -EINVAL;
    + }
    +
    + fp->filp->f_pos = current_byte_offset;
    + return 0;
    +}
    +
    +static int set_file_mode_info(struct ksmbd_file *fp, char *buf)
    +{
    + struct smb2_file_mode_info *file_info;
    + __le32 mode;
    +
    + file_info = (struct smb2_file_mode_info *)buf;
    + mode = file_info->Mode;
    +
    + if ((mode & ~FILE_MODE_INFO_MASK) ||
    + (mode & FILE_SYNCHRONOUS_IO_ALERT_LE &&
    + mode & FILE_SYNCHRONOUS_IO_NONALERT_LE)) {
    + ksmbd_err("Mode is not valid : 0x%x\n", le32_to_cpu(mode));
    + return -EINVAL;
    + }
    +
    + /*
    + * TODO : need to implement consideration for
    + * FILE_SYNCHRONOUS_IO_ALERT and FILE_SYNCHRONOUS_IO_NONALERT
    + */
    + ksmbd_vfs_set_fadvise(fp->filp, mode);
    + fp->coption = mode;
    + return 0;
    +}
    +
    +/**
    + * smb2_set_info_file() - handler for smb2 set info command
    + * @work: smb work containing set info command buffer
    + * @fp: ksmbd_file pointer
    + * @info_class: smb2 set info class
    + * @share: ksmbd_share_config pointer
    + *
    + * Return: 0 on success, otherwise error
    + * TODO: need to implement an error handling for STATUS_INFO_LENGTH_MISMATCH
    + */
    +static int smb2_set_info_file(struct ksmbd_work *work, struct ksmbd_file *fp,
    + int info_class, char *buf,
    + struct ksmbd_share_config *share)
    +{
    + switch (info_class) {
    + case FILE_BASIC_INFORMATION:
    + return set_file_basic_info(fp, buf, share);
    +
    + case FILE_ALLOCATION_INFORMATION:
    + return set_file_allocation_info(work, fp, buf);
    +
    + case FILE_END_OF_FILE_INFORMATION:
    + return set_end_of_file_info(work, fp, buf);
    +
    + case FILE_RENAME_INFORMATION:
    + if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
    + ksmbd_debug(SMB,
    + "User does not have write permission\n");
    + return -EACCES;
    + }
    + return set_rename_info(work, fp, buf);
    +
    + case FILE_LINK_INFORMATION:
    + return smb2_create_link(work, work->tcon->share_conf,
    + (struct smb2_file_link_info *)buf, fp->filp,
    + work->sess->conn->local_nls);
    +
    + case FILE_DISPOSITION_INFORMATION:
    + if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
    + ksmbd_debug(SMB,
    + "User does not have write permission\n");
    + return -EACCES;
    + }
    + return set_file_disposition_info(fp, buf);
    +
    + case FILE_FULL_EA_INFORMATION:
    + {
    + if (!(fp->daccess & FILE_WRITE_EA_LE)) {
    + ksmbd_err("Not permitted to write ext attr: 0x%x\n",
    + fp->daccess);
    + return -EACCES;
    + }
    +
    + return smb2_set_ea((struct smb2_ea_info *)buf,
    + &fp->filp->f_path);
    + }
    +
    + case FILE_POSITION_INFORMATION:
    + return set_file_position_info(fp, buf);
    +
    + case FILE_MODE_INFORMATION:
    + return set_file_mode_info(fp, buf);
    + }
    +
    + ksmbd_err("Unimplemented Fileinfoclass :%d\n", info_class);
    + return -EOPNOTSUPP;
    +}
    +
    +static int smb2_set_info_sec(struct ksmbd_file *fp, int addition_info,
    + char *buffer, int buf_len)
    +{
    + struct smb_ntsd *pntsd = (struct smb_ntsd *)buffer;
    +
    + fp->saccess |= FILE_SHARE_DELETE_LE;
    +
    + return set_info_sec(fp->conn, fp->tcon, fp->filp->f_path.dentry, pntsd,
    + buf_len, false);
    +}
    +
    +/**
    + * smb2_set_info() - handler for smb2 set info command handler
    + * @work: smb work containing set info request buffer
    + *
    + * Return: 0 on success, otherwise error
    + */
    +int smb2_set_info(struct ksmbd_work *work)
    +{
    + struct smb2_set_info_req *req;
    + struct smb2_set_info_rsp *rsp, *rsp_org;
    + struct ksmbd_file *fp;
    + int rc = 0;
    + unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
    +
    + ksmbd_debug(SMB, "Received set info request\n");
    +
    + rsp_org = work->response_buf;
    + if (work->next_smb2_rcv_hdr_off) {
    + req = REQUEST_BUF_NEXT(work);
    + rsp = RESPONSE_BUF_NEXT(work);
    + if (!HAS_FILE_ID(le64_to_cpu(req->VolatileFileId))) {
    + ksmbd_debug(SMB, "Compound request set FID = %u\n",
    + work->compound_fid);
    + id = work->compound_fid;
    + pid = work->compound_pfid;
    + }
    + } else {
    + req = work->request_buf;
    + rsp = work->response_buf;
    + }
    +
    + if (!HAS_FILE_ID(id)) {
    + id = le64_to_cpu(req->VolatileFileId);
    + pid = le64_to_cpu(req->PersistentFileId);
    + }
    +
    + fp = ksmbd_lookup_fd_slow(work, id, pid);
    + if (!fp) {
    + ksmbd_debug(SMB, "Invalid id for close: %u\n", id);
    + rc = -ENOENT;
    + goto err_out;
    + }
    +
    + switch (req->InfoType) {
    + case SMB2_O_INFO_FILE:
    + ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILE\n");
    + rc = smb2_set_info_file(work, fp, req->FileInfoClass,
    + req->Buffer, work->tcon->share_conf);
    + break;
    + case SMB2_O_INFO_SECURITY:
    + ksmbd_debug(SMB, "GOT SMB2_O_INFO_SECURITY\n");
    + rc = smb2_set_info_sec(fp,
    + le32_to_cpu(req->AdditionalInformation),
    + req->Buffer,
    + le32_to_cpu(req->BufferLength));
    + break;
    + default:
    + rc = -EOPNOTSUPP;
    + }
    +
    + if (rc < 0)
    + goto err_out;
    +
    + rsp->StructureSize = cpu_to_le16(2);
    + inc_rfc1001_len(rsp_org, 2);
    + ksmbd_fd_put(work, fp);
    + return 0;
    +
    +err_out:
    + if (rc == -EACCES || rc == -EPERM)
    + rsp->hdr.Status = STATUS_ACCESS_DENIED;
    + else if (rc == -EINVAL)
    + rsp->hdr.Status = STATUS_INVALID_PARAMETER;
    + else if (rc == -ESHARE)
    + rsp->hdr.Status = STATUS_SHARING_VIOLATION;
    + else if (rc == -ENOENT)
    + rsp->hdr.Status = STATUS_OBJECT_NAME_INVALID;
    + else if (rc == -EBUSY || rc == -ENOTEMPTY)
    + rsp->hdr.Status = STATUS_DIRECTORY_NOT_EMPTY;
    + else if (rc == -EAGAIN)
    + rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
    + else if (rc == -EBADF || rc == -ESTALE)
    + rsp->hdr.Status = STATUS_INVALID_HANDLE;
    + else if (rc == -EEXIST)
    + rsp->hdr.Status = STATUS_OBJECT_NAME_COLLISION;
    + else if (rsp->hdr.Status == 0 || rc == -EOPNOTSUPP)
    + rsp->hdr.Status = STATUS_INVALID_INFO_CLASS;
    + smb2_set_err_rsp(work);
    + ksmbd_fd_put(work, fp);
    + ksmbd_debug(SMB, "error while processing smb2 query rc = %d\n", rc);
    + return rc;
    +}
    +
    +/**
    + * smb2_read_pipe() - handler for smb2 read from IPC pipe
    + * @work: smb work containing read IPC pipe command buffer
    + *
    + * Return: 0 on success, otherwise error
    + */
    +static noinline int smb2_read_pipe(struct ksmbd_work *work)
    +{
    + int nbytes = 0, err;
    + u64 id;
    + struct ksmbd_rpc_command *rpc_resp;
    + struct smb2_read_req *req = work->request_buf;
    + struct smb2_read_rsp *rsp = work->response_buf;
    +
    + id = le64_to_cpu(req->VolatileFileId);
    +
    + inc_rfc1001_len(rsp, 16);
    + rpc_resp = ksmbd_rpc_read(work->sess, id);
    + if (rpc_resp) {
    + if (rpc_resp->flags != KSMBD_RPC_OK) {
    + err = -EINVAL;
    + goto out;
    + }
    +
    + work->aux_payload_buf =
    + kvmalloc(rpc_resp->payload_sz, GFP_KERNEL | __GFP_ZERO);
    + if (!work->aux_payload_buf) {
    + err = -ENOMEM;
    + goto out;
    + }
    +
    + memcpy(work->aux_payload_buf, rpc_resp->payload,
    + rpc_resp->payload_sz);
    +
    + nbytes = rpc_resp->payload_sz;
    + work->resp_hdr_sz = get_rfc1002_len(rsp) + 4;
    + work->aux_payload_sz = nbytes;
    + kvfree(rpc_resp);
    + }
    +
    + rsp->StructureSize = cpu_to_le16(17);
    + rsp->DataOffset = 80;
    + rsp->Reserved = 0;
    + rsp->DataLength = cpu_to_le32(nbytes);
    + rsp->DataRemaining = 0;
    + rsp->Reserved2 = 0;
    + inc_rfc1001_len(rsp, nbytes);
    + return 0;
    +
    +out:
    + rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
    + smb2_set_err_rsp(work);
    + kvfree(rpc_resp);
    + return err;
    +}
    +
    +static ssize_t smb2_read_rdma_channel(struct ksmbd_work *work,
    + struct smb2_read_req *req, void *data_buf,
    + size_t length)
    +{
    + struct smb2_buffer_desc_v1 *desc =
    + (struct smb2_buffer_desc_v1 *)&req->Buffer[0];
    + int err;
    +
    + if (work->conn->dialect == SMB30_PROT_ID &&
    + req->Channel != SMB2_CHANNEL_RDMA_V1)
    + return -EINVAL;
    +
    + if (req->ReadChannelInfoOffset == 0 ||
    + le16_to_cpu(req->ReadChannelInfoLength) < sizeof(*desc))
    + return -EINVAL;
    +
    + work->need_invalidate_rkey =
    + (req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE);
    + work->remote_key = le32_to_cpu(desc->token);
    +
    + err = ksmbd_conn_rdma_write(work->conn, data_buf, length,
    + le32_to_cpu(desc->token),
    + le64_to_cpu(desc->offset),
    + le32_to_cpu(desc->length));
    + if (err)
    + return err;
    +
    + return length;
    +}
    +
    +/**
    + * smb2_read() - handler for smb2 read from file
    + * @work: smb work containing read command buffer
    + *
    + * Return: 0 on success, otherwise error
    + */
    +int smb2_read(struct ksmbd_work *work)
    +{
    + struct ksmbd_conn *conn = work->conn;
    + struct smb2_read_req *req;
    + struct smb2_read_rsp *rsp, *rsp_org;
    + struct ksmbd_file *fp;
    + loff_t offset;
    + size_t length, mincount;
    + ssize_t nbytes = 0, remain_bytes = 0;
    + int err = 0;
    +
    + rsp_org = work->response_buf;
    + WORK_BUFFERS(work, req, rsp);
    +
    + if (test_share_config_flag(work->tcon->share_conf,
    + KSMBD_SHARE_FLAG_PIPE)) {
    + ksmbd_debug(SMB, "IPC pipe read request\n");
    + return smb2_read_pipe(work);
    + }
    +
    + fp = ksmbd_lookup_fd_slow(work, le64_to_cpu(req->VolatileFileId),
    + le64_to_cpu(req->PersistentFileId));
    + if (!fp) {
    + err = -ENOENT;
    + goto out;
    + }
    +
    + if (!(fp->daccess & (FILE_READ_DATA_LE | FILE_READ_ATTRIBUTES_LE))) {
    + ksmbd_err("Not permitted to read : 0x%x\n", fp->daccess);
    + err = -EACCES;
    + goto out;
    + }
    +
    + offset = le64_to_cpu(req->Offset);
    + length = le32_to_cpu(req->Length);
    + mincount = le32_to_cpu(req->MinimumCount);
    +
    + if (length > conn->vals->max_read_size) {
    + ksmbd_debug(SMB, "limiting read size to max size(%u)\n",
    + conn->vals->max_read_size);
    + err = -EINVAL;
    + goto out;
    + }
    +
    + ksmbd_debug(SMB, "filename %s, offset %lld, len %zu\n", FP_FILENAME(fp),
    + offset, length);
    +
    + if (server_conf.flags & KSMBD_GLOBAL_FLAG_CACHE_RBUF) {
    + work->aux_payload_buf =
    + ksmbd_find_buffer(conn->vals->max_read_size);
    + work->set_read_buf = true;
    + } else {
    + work->aux_payload_buf = kvmalloc(length, GFP_KERNEL | __GFP_ZERO);
    + }
    + if (!work->aux_payload_buf) {
    + err = -ENOMEM;
    + goto out;
    + }
    +
    + nbytes = ksmbd_vfs_read(work, fp, length, &offset);
    + if (nbytes < 0) {
    + err = nbytes;
    + goto out;
    + }
    +
    + if ((nbytes == 0 && length != 0) || nbytes < mincount) {
    + if (server_conf.flags & KSMBD_GLOBAL_FLAG_CACHE_RBUF)
    + ksmbd_release_buffer(work->aux_payload_buf);
    + else
    + kvfree(work->aux_payload_buf);
    + work->aux_payload_buf = NULL;
    + rsp->hdr.Status = STATUS_END_OF_FILE;
    + smb2_set_err_rsp(work);
    + ksmbd_fd_put(work, fp);
    + return 0;
    + }
    +
    + ksmbd_debug(SMB, "nbytes %zu, offset %lld mincount %zu\n",
    + nbytes, offset, mincount);
    +
    + if (req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE ||
    + req->Channel == SMB2_CHANNEL_RDMA_V1) {
    + /* write data to the client using rdma channel */
    + remain_bytes = smb2_read_rdma_channel(work, req,
    + work->aux_payload_buf,
    + nbytes);
    + if (server_conf.flags & KSMBD_GLOBAL_FLAG_CACHE_RBUF)
    + ksmbd_release_buffer(work->aux_payload_buf);
    + else
    + kvfree(work->aux_payload_buf);
    + work->aux_payload_buf = NULL;
    +
    + nbytes = 0;
    + if (remain_bytes < 0) {
    + err = (int)remain_bytes;
    + goto out;
    + }
    + }
    +
    + rsp->StructureSize = cpu_to_le16(17);
    + rsp->DataOffset = 80;
    + rsp->Reserved = 0;
    + rsp->DataLength = cpu_to_le32(nbytes);
    + rsp->DataRemaining = cpu_to_le32(remain_bytes);
    + rsp->Reserved2 = 0;
    + inc_rfc1001_len(rsp_org, 16);
    + work->resp_hdr_sz = get_rfc1002_len(rsp_org) + 4;
    + work->aux_payload_sz = nbytes;
    + inc_rfc1001_len(rsp_org, nbytes);
    + ksmbd_fd_put(work, fp);
    + return 0;
    +
    +out:
    + if (err) {
    + if (err == -EISDIR)
    + rsp->hdr.Status = STATUS_INVALID_DEVICE_REQUEST;
    + else if (err == -EAGAIN)
    + rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
    + else if (err == -ENOENT)
    + rsp->hdr.Status = STATUS_FILE_CLOSED;
    + else if (err == -EACCES)
    + rsp->hdr.Status = STATUS_ACCESS_DENIED;
    + else if (err == -ESHARE)
    + rsp->hdr.Status = STATUS_SHARING_VIOLATION;
    + else if (err == -EINVAL)
    + rsp->hdr.Status = STATUS_INVALID_PARAMETER;
    + else
    + rsp->hdr.Status = STATUS_INVALID_HANDLE;
    +
    + smb2_set_err_rsp(work);
    + }
    + ksmbd_fd_put(work, fp);
    + return err;
    +}
    +
    +/**
    + * smb2_write_pipe() - handler for smb2 write on IPC pipe
    + * @work: smb work containing write IPC pipe command buffer
    + *
    + * Return: 0 on success, otherwise error
    + */
    +static noinline int smb2_write_pipe(struct ksmbd_work *work)
    +{
    + struct smb2_write_req *req = work->request_buf;
    + struct smb2_write_rsp *rsp = work->response_buf;
    + struct ksmbd_rpc_command *rpc_resp;
    + u64 id = 0;
    + int err = 0, ret = 0;
    + char *data_buf;
    + size_t length;
    +
    + length = le32_to_cpu(req->Length);
    + id = le64_to_cpu(req->VolatileFileId);
    +
    + if (le16_to_cpu(req->DataOffset) ==
    + (offsetof(struct smb2_write_req, Buffer) - 4)) {
    + data_buf = (char *)&req->Buffer[0];
    + } else {
    + if ((le16_to_cpu(req->DataOffset) > get_rfc1002_len(req)) ||
    + (le16_to_cpu(req->DataOffset) + length > get_rfc1002_len(req))) {
    + ksmbd_err("invalid write data offset %u, smb_len %u\n",
    + le16_to_cpu(req->DataOffset),
    + get_rfc1002_len(req));
    + err = -EINVAL;
    + goto out;
    + }
    +
    + data_buf = (char *)(((char *)&req->hdr.ProtocolId) +
    + le16_to_cpu(req->DataOffset));
    + }
    +
    + rpc_resp = ksmbd_rpc_write(work->sess, id, data_buf, length);
    + if (rpc_resp) {
    + if (rpc_resp->flags == KSMBD_RPC_ENOTIMPLEMENTED) {
    + rsp->hdr.Status = STATUS_NOT_SUPPORTED;
    + kvfree(rpc_resp);
    + smb2_set_err_rsp(work);
    + return -EOPNOTSUPP;
    + }
    + if (rpc_resp->flags != KSMBD_RPC_OK) {
    + rsp->hdr.Status = STATUS_INVALID_HANDLE;
    + smb2_set_err_rsp(work);
    + kvfree(rpc_resp);
    + return ret;
    + }
    + kvfree(rpc_resp);
    + }
    +
    + rsp->StructureSize = cpu_to_le16(17);
    + rsp->DataOffset = 0;
    + rsp->Reserved = 0;
    + rsp->DataLength = cpu_to_le32(length);
    + rsp->DataRemaining = 0;
    + rsp->Reserved2 = 0;
    + inc_rfc1001_len(rsp, 16);
    + return 0;
    +out:
    + if (err) {
    + rsp->hdr.Status = STATUS_INVALID_HANDLE;
    + smb2_set_err_rsp(work);
    + }
    +
    + return err;
    +}
    +
    +static ssize_t smb2_write_rdma_channel(struct ksmbd_work *work,
    + struct smb2_write_req *req,
    + struct ksmbd_file *fp,
    + loff_t offset, size_t length, bool sync)
    +{
    + struct smb2_buffer_desc_v1 *desc;
    + char *data_buf;
    + int ret;
    + ssize_t nbytes;
    +
    + desc = (struct smb2_buffer_desc_v1 *)&req->Buffer[0];
    +
    + if (work->conn->dialect == SMB30_PROT_ID &&
    + req->Channel != SMB2_CHANNEL_RDMA_V1)
    + return -EINVAL;
    +
    + if (req->Length != 0 || req->DataOffset != 0)
    + return -EINVAL;
    +
    + if (req->WriteChannelInfoOffset == 0 ||
    + le16_to_cpu(req->WriteChannelInfoLength) < sizeof(*desc))
    + return -EINVAL;
    +
    + work->need_invalidate_rkey =
    + (req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE);
    + work->remote_key = le32_to_cpu(desc->token);
    +
    + data_buf = kvmalloc(length, GFP_KERNEL | __GFP_ZERO);
    + if (!data_buf)
    + return -ENOMEM;
    +
    + ret = ksmbd_conn_rdma_read(work->conn, data_buf, length,
    + le32_to_cpu(desc->token),
    + le64_to_cpu(desc->offset),
    + le32_to_cpu(desc->length));
    + if (ret < 0) {
    + kvfree(data_buf);
    + return ret;
    + }
    +
    + ret = ksmbd_vfs_write(work, fp, data_buf, length, &offset, sync, &nbytes);
    + kvfree(data_buf);
    + if (ret < 0)
    + return ret;
    +
    + return nbytes;
    +}
    +
    +/**
    + * smb2_write() - handler for smb2 write from file
    + * @work: smb work containing write command buffer
    + *
    + * Return: 0 on success, otherwise error
    + */
    +int smb2_write(struct ksmbd_work *work)
    +{
    + struct smb2_write_req *req;
    + struct smb2_write_rsp *rsp, *rsp_org;
    + struct ksmbd_file *fp = NULL;
    + loff_t offset;
    + size_t length;
    + ssize_t nbytes;
    + char *data_buf;
    + bool writethrough = false;
    + int err = 0;
    +
    + rsp_org = work->response_buf;
    + WORK_BUFFERS(work, req, rsp);
    +
    + if (test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_PIPE)) {
    + ksmbd_debug(SMB, "IPC pipe write request\n");
    + return smb2_write_pipe(work);
    + }
    +
    + if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
    + ksmbd_debug(SMB, "User does not have write permission\n");
    + err = -EACCES;
    + goto out;
    + }
    +
    + fp = ksmbd_lookup_fd_slow(work, le64_to_cpu(req->VolatileFileId),
    + le64_to_cpu(req->PersistentFileId));
    + if (!fp) {
    + err = -ENOENT;
    + goto out;
    + }
    +
    + if (!(fp->daccess & (FILE_WRITE_DATA_LE | FILE_READ_ATTRIBUTES_LE))) {
    + ksmbd_err("Not permitted to write : 0x%x\n", fp->daccess);
    + err = -EACCES;
    + goto out;
    + }
    +
    + offset = le64_to_cpu(req->Offset);
    + length = le32_to_cpu(req->Length);
    +
    + if (length > work->conn->vals->max_write_size) {
    + ksmbd_debug(SMB, "limiting write size to max size(%u)\n",
    + work->conn->vals->max_write_size);
    + err = -EINVAL;
    + goto out;
    + }
    +
    + if (le32_to_cpu(req->Flags) & SMB2_WRITEFLAG_WRITE_THROUGH)
    + writethrough = true;
    +
    + if (req->Channel != SMB2_CHANNEL_RDMA_V1 &&
    + req->Channel != SMB2_CHANNEL_RDMA_V1_INVALIDATE) {
    + if (le16_to_cpu(req->DataOffset) ==
    + (offsetof(struct smb2_write_req, Buffer) - 4)) {
    + data_buf = (char *)&req->Buffer[0];
    + } else {
    + if ((le16_to_cpu(req->DataOffset) > get_rfc1002_len(req)) ||
    + (le16_to_cpu(req->DataOffset) + length > get_rfc1002_len(req))) {
    + ksmbd_err("invalid write data offset %u, smb_len %u\n",
    + le16_to_cpu(req->DataOffset),
    + get_rfc1002_len(req));
    + err = -EINVAL;
    + goto out;
    + }
    +
    + data_buf = (char *)(((char *)&req->hdr.ProtocolId) +
    + le16_to_cpu(req->DataOffset));
    + }
    +
    + ksmbd_debug(SMB, "flags %u\n", le32_to_cpu(req->Flags));
    + if (le32_to_cpu(req->Flags) & SMB2_WRITEFLAG_WRITE_THROUGH)
    + writethrough = true;
    +
    + ksmbd_debug(SMB, "filename %s, offset %lld, len %zu\n",
    + FP_FILENAME(fp), offset, length);
    + err = ksmbd_vfs_write(work, fp, data_buf, length, &offset,
    + writethrough, &nbytes);
    + if (err < 0)
    + goto out;
    + } else {
    + /* read data from the client using rdma channel, and
    + * write the data.
    + */
    + nbytes = smb2_write_rdma_channel(work, req, fp, offset,
    + le32_to_cpu(req->RemainingBytes),
    + writethrough);
    + if (nbytes < 0) {
    + err = (int)nbytes;
    + goto out;
    + }
    + }
    +
    + rsp->StructureSize = cpu_to_le16(17);
    + rsp->DataOffset = 0;
    + rsp->Reserved = 0;
    + rsp->DataLength = cpu_to_le32(nbytes);
    + rsp->DataRemaining = 0;
    + rsp->Reserved2 = 0;
    + inc_rfc1001_len(rsp_org, 16);
    + ksmbd_fd_put(work, fp);
    + return 0;
    +
    +out:
    + if (err == -EAGAIN)
    + rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
    + else if (err == -ENOSPC || err == -EFBIG)
    + rsp->hdr.Status = STATUS_DISK_FULL;
    + else if (err == -ENOENT)
    + rsp->hdr.Status = STATUS_FILE_CLOSED;
    + else if (err == -EACCES)
    + rsp->hdr.Status = STATUS_ACCESS_DENIED;
    + else if (err == -ESHARE)
    + rsp->hdr.Status = STATUS_SHARING_VIOLATION;
    + else if (err == -EINVAL)
    + rsp->hdr.Status = STATUS_INVALID_PARAMETER;
    + else
    + rsp->hdr.Status = STATUS_INVALID_HANDLE;
    +
    + smb2_set_err_rsp(work);
    + ksmbd_fd_put(work, fp);
    + return err;
    +}
    +
    +/**
    + * smb2_flush() - handler for smb2 flush file - fsync
    + * @work: smb work containing flush command buffer
    + *
    + * Return: 0 on success, otherwise error
    + */
    +int smb2_flush(struct ksmbd_work *work)
    +{
    + struct smb2_flush_req *req;
    + struct smb2_flush_rsp *rsp, *rsp_org;
    + int err;
    +
    + rsp_org = work->response_buf;
    + WORK_BUFFERS(work, req, rsp);
    +
    + ksmbd_debug(SMB, "SMB2_FLUSH called for fid %llu\n",
    + le64_to_cpu(req->VolatileFileId));
    +
    + err = ksmbd_vfs_fsync(work,
    + le64_to_cpu(req->VolatileFileId),
    + le64_to_cpu(req->PersistentFileId));
    + if (err)
    + goto out;
    +
    + rsp->StructureSize = cpu_to_le16(4);
    + rsp->Reserved = 0;
    + inc_rfc1001_len(rsp_org, 4);
    + return 0;
    +
    +out:
    + if (err) {
    + rsp->hdr.Status = STATUS_INVALID_HANDLE;
    + smb2_set_err_rsp(work);
    + }
    +
    + return err;
    +}
    +
    +/**
    + * smb2_cancel() - handler for smb2 cancel command
    + * @work: smb work containing cancel command buffer
    + *
    + * Return: 0 on success, otherwise error
    + */
    +int smb2_cancel(struct ksmbd_work *work)
    +{
    + struct ksmbd_conn *conn = work->conn;
    + struct smb2_hdr *hdr = work->request_buf;
    + struct smb2_hdr *chdr;
    + struct ksmbd_work *cancel_work = NULL;
    + struct list_head *tmp;
    + int canceled = 0;
    + struct list_head *command_list;
    +
    + ksmbd_debug(SMB, "smb2 cancel called on mid %llu, async flags 0x%x\n",
    + hdr->MessageId, hdr->Flags);
    +
    + if (hdr->Flags & SMB2_FLAGS_ASYNC_COMMAND) {
    + command_list = &conn->async_requests;
    +
    + spin_lock(&conn->request_lock);
    + list_for_each(tmp, command_list) {
    + cancel_work = list_entry(tmp, struct ksmbd_work,
    + async_request_entry);
    + chdr = cancel_work->request_buf;
    +
    + if (cancel_work->async_id !=
    + le64_to_cpu(hdr->Id.AsyncId))
    + continue;
    +
    + ksmbd_debug(SMB,
    + "smb2 with AsyncId %llu cancelled command = 0x%x\n",
    + le64_to_cpu(hdr->Id.AsyncId),
    + le16_to_cpu(chdr->Command));
    + canceled = 1;
    + break;
    + }
    + spin_unlock(&conn->request_lock);
    + } else {
    + command_list = &conn->requests;
    +
    + spin_lock(&conn->request_lock);
    + list_for_each(tmp, command_list) {
    + cancel_work = list_entry(tmp, struct ksmbd_work,
    + request_entry);
    + chdr = cancel_work->request_buf;
    +
    + if (chdr->MessageId != hdr->MessageId ||
    + cancel_work == work)
    + continue;
    +
    + ksmbd_debug(SMB,
    + "smb2 with mid %llu cancelled command = 0x%x\n",
    + le64_to_cpu(hdr->MessageId),
    + le16_to_cpu(chdr->Command));
    + canceled = 1;
    + break;
    + }
    + spin_unlock(&conn->request_lock);
    + }
    +
    + if (canceled) {
    + cancel_work->state = KSMBD_WORK_CANCELLED;
    + if (cancel_work->cancel_fn)
    + cancel_work->cancel_fn(cancel_work->cancel_argv);
    + }
    +
    + /* For SMB2_CANCEL command itself send no response*/
    + work->send_no_response = 1;
    + return 0;
    +}
    +
    +struct file_lock *smb_flock_init(struct file *f)
    +{
    + struct file_lock *fl;
    +
    + fl = locks_alloc_lock();
    + if (!fl)
    + goto out;
    +
    + locks_init_lock(fl);
    +
    + fl->fl_owner = f;
    + fl->fl_pid = current->tgid;
    + fl->fl_file = f;
    + fl->fl_flags = FL_POSIX;
    + fl->fl_ops = NULL;
    + fl->fl_lmops = NULL;
    +
    +out:
    + return fl;
    +}
    +
    +static int smb2_set_flock_flags(struct file_lock *flock, int flags)
    +{
    + int cmd = -EINVAL;
    +
    + /* Checking for wrong flag combination during lock request*/
    + switch (flags) {
    + case SMB2_LOCKFLAG_SHARED:
    + ksmbd_debug(SMB, "received shared request\n");
    + cmd = F_SETLKW;
    + flock->fl_type = F_RDLCK;
    + flock->fl_flags |= FL_SLEEP;
    + break;
    + case SMB2_LOCKFLAG_EXCLUSIVE:
    + ksmbd_debug(SMB, "received exclusive request\n");
    + cmd = F_SETLKW;
    + flock->fl_type = F_WRLCK;
    + flock->fl_flags |= FL_SLEEP;
    + break;
    + case SMB2_LOCKFLAG_SHARED | SMB2_LOCKFLAG_FAIL_IMMEDIATELY:
    + ksmbd_debug(SMB,
    + "received shared & fail immediately request\n");
    + cmd = F_SETLK;
    + flock->fl_type = F_RDLCK;
    + break;
    + case SMB2_LOCKFLAG_EXCLUSIVE | SMB2_LOCKFLAG_FAIL_IMMEDIATELY:
    + ksmbd_debug(SMB,
    + "received exclusive & fail immediately request\n");
    + cmd = F_SETLK;
    + flock->fl_type = F_WRLCK;
    + break;
    + case SMB2_LOCKFLAG_UNLOCK:
    + ksmbd_debug(SMB, "received unlock request\n");
    + flock->fl_type = F_UNLCK;
    + cmd = 0;
    + break;
    + }
    +
    + return cmd;
    +}
    +
    +static struct ksmbd_lock *smb2_lock_init(struct file_lock *flock,
    + unsigned int cmd, int flags,
    + struct list_head *lock_list)
    +{
    + struct ksmbd_lock *lock;
    +
    + lock = kzalloc(sizeof(struct ksmbd_lock), GFP_KERNEL);
    + if (!lock)
    + return NULL;
    +
    + lock->cmd = cmd;
    + lock->fl = flock;
    + lock->start = flock->fl_start;
    + lock->end = flock->fl_end;
    + lock->flags = flags;
    + if (lock->start == lock->end)
    + lock->zero_len = 1;
    + INIT_LIST_HEAD(&lock->llist);
    + INIT_LIST_HEAD(&lock->glist);
    + list_add_tail(&lock->llist, lock_list);
    +
    + return lock;
    +}
    +
    +static void smb2_remove_blocked_lock(void **argv)
    +{
    + struct file_lock *flock = (struct file_lock *)argv[0];
    +
    + ksmbd_vfs_posix_lock_unblock(flock);
    + wake_up(&flock->fl_wait);
    +}
    +
    +static inline bool lock_defer_pending(struct file_lock *fl)
    +{
    + /* check pending lock waiters */
    + return waitqueue_active(&fl->fl_wait);
    +}
    +
    +/**
    + * smb2_lock() - handler for smb2 file lock command
    + * @work: smb work containing lock command buffer
    + *
    + * Return: 0 on success, otherwise error
    + */
    +int smb2_lock(struct ksmbd_work *work)
    +{
    + struct smb2_lock_req *req = work->request_buf;
    + struct smb2_lock_rsp *rsp = work->response_buf;
    + struct smb2_lock_element *lock_ele;
    + struct ksmbd_file *fp = NULL;
    + struct file_lock *flock = NULL;
    + struct file *filp = NULL;
    + int lock_count;
    + int flags = 0;
    + int cmd = 0;
    + int err = 0, i;
    + u64 lock_start, lock_length;
    + struct ksmbd_lock *smb_lock = NULL, *cmp_lock, *tmp;
    + int nolock = 0;
    + LIST_HEAD(lock_list);
    + LIST_HEAD(rollback_list);
    + int prior_lock = 0;
    +
    + ksmbd_debug(SMB, "Received lock request\n");
    + fp = ksmbd_lookup_fd_slow(work,
    + le64_to_cpu(req->VolatileFileId),
    + le64_to_cpu(req->PersistentFileId));
    + if (!fp) {
    + ksmbd_debug(SMB, "Invalid file id for lock : %llu\n",
    + le64_to_cpu(req->VolatileFileId));
    + rsp->hdr.Status = STATUS_FILE_CLOSED;
    + goto out2;
    + }
    +
    + filp = fp->filp;
    + lock_count = le16_to_cpu(req->LockCount);
    + lock_ele = req->locks;
    +
    + ksmbd_debug(SMB, "lock count is %d\n", lock_count);
    + if (!lock_count) {
    + rsp->hdr.Status = STATUS_INVALID_PARAMETER;
    + goto out2;
    + }
    +
    + for (i = 0; i < lock_count; i++) {
    + flags = le32_to_cpu(lock_ele[i].Flags);
    +
    + flock = smb_flock_init(filp);
    + if (!flock) {
    + rsp->hdr.Status = STATUS_LOCK_NOT_GRANTED;
    + goto out;
    + }
    +
    + cmd = smb2_set_flock_flags(flock, flags);
    +
    + lock_start = le64_to_cpu(lock_ele[i].Offset);
    + lock_length = le64_to_cpu(lock_ele[i].Length);
    + if (lock_start > U64_MAX - lock_length) {
    + ksmbd_err("Invalid lock range requested\n");
    + rsp->hdr.Status = STATUS_INVALID_LOCK_RANGE;
    + goto out;
    + }
    +
    + if (lock_start > OFFSET_MAX)
    + flock->fl_start = OFFSET_MAX;
    + else
    + flock->fl_start = lock_start;
    +
    + lock_length = le64_to_cpu(lock_ele[i].Length);
    + if (lock_length > OFFSET_MAX - flock->fl_start)
    + lock_length = OFFSET_MAX - flock->fl_start;
    +
    + flock->fl_end = flock->fl_start + lock_length;
    +
    + if (flock->fl_end < flock->fl_start) {
    + ksmbd_debug(SMB,
    + "the end offset(%llx) is smaller than the start offset(%llx)\n",
    + flock->fl_end, flock->fl_start);
    + rsp->hdr.Status = STATUS_INVALID_LOCK_RANGE;
    + goto out;
    + }
    +
    + /* Check conflict locks in one request */
    + list_for_each_entry(cmp_lock, &lock_list, llist) {
    + if (cmp_lock->fl->fl_start <= flock->fl_start &&
    + cmp_lock->fl->fl_end >= flock->fl_end) {
    + if (cmp_lock->fl->fl_type != F_UNLCK &&
    + flock->fl_type != F_UNLCK) {
    + ksmbd_err("conflict two locks in one request\n");
    + rsp->hdr.Status =
    + STATUS_INVALID_PARAMETER;
    + goto out;
    + }
    + }
    + }
    +
    + smb_lock = smb2_lock_init(flock, cmd, flags, &lock_list);
    + if (!smb_lock) {
    + rsp->hdr.Status = STATUS_INVALID_PARAMETER;
    + goto out;
    + }
    + }
    +
    + list_for_each_entry_safe(smb_lock, tmp, &lock_list, llist) {
    + if (smb_lock->cmd < 0) {
    + rsp->hdr.Status = STATUS_INVALID_PARAMETER;
    + goto out;
    + }
    +
    + if (!(smb_lock->flags & SMB2_LOCKFLAG_MASK)) {
    + rsp->hdr.Status = STATUS_INVALID_PARAMETER;
    + goto out;
    + }
    +
    + if ((prior_lock & (SMB2_LOCKFLAG_EXCLUSIVE | SMB2_LOCKFLAG_SHARED) &&
    + smb_lock->flags & SMB2_LOCKFLAG_UNLOCK) ||
    + (prior_lock == SMB2_LOCKFLAG_UNLOCK &&
    + !(smb_lock->flags & SMB2_LOCKFLAG_UNLOCK))) {
    + rsp->hdr.Status = STATUS_INVALID_PARAMETER;
    + goto out;
    + }
    +
    + prior_lock = smb_lock->flags;
    +
    + if (!(smb_lock->flags & SMB2_LOCKFLAG_UNLOCK) &&
    + !(smb_lock->flags & SMB2_LOCKFLAG_FAIL_IMMEDIATELY))
    + goto no_check_gl;
    +
    + nolock = 1;
    + /* check locks in global list */
    + list_for_each_entry(cmp_lock, &global_lock_list, glist) {
    + if (file_inode(cmp_lock->fl->fl_file) !=
    + file_inode(smb_lock->fl->fl_file))
    + continue;
    +
    + if (smb_lock->fl->fl_type == F_UNLCK) {
    + if (cmp_lock->fl->fl_file == smb_lock->fl->fl_file &&
    + cmp_lock->start == smb_lock->start &&
    + cmp_lock->end == smb_lock->end &&
    + !lock_defer_pending(cmp_lock->fl)) {
    + nolock = 0;
    + locks_free_lock(cmp_lock->fl);
    + list_del(&cmp_lock->glist);
    + kfree(cmp_lock);
    + break;
    + }
    + continue;
    + }
    +
    + if (cmp_lock->fl->fl_file == smb_lock->fl->fl_file) {
    + if (smb_lock->flags & SMB2_LOCKFLAG_SHARED)
    + continue;
    + } else {
    + if (cmp_lock->flags & SMB2_LOCKFLAG_SHARED)
    + continue;
    + }
    +
    + /* check zero byte lock range */
    + if (cmp_lock->zero_len && !smb_lock->zero_len &&
    + cmp_lock->start > smb_lock->start &&
    + cmp_lock->start < smb_lock->end) {
    + ksmbd_err("previous lock conflict with zero byte lock range\n");
    + rsp->hdr.Status = STATUS_LOCK_NOT_GRANTED;
    + goto out;
    + }
    +
    + if (smb_lock->zero_len && !cmp_lock->zero_len &&
    + smb_lock->start > cmp_lock->start &&
    + smb_lock->start < cmp_lock->end) {
    + ksmbd_err("current lock conflict with zero byte lock range\n");
    + rsp->hdr.Status = STATUS_LOCK_NOT_GRANTED;
    + goto out;
    + }
    +
    + if (((cmp_lock->start <= smb_lock->start &&
    + cmp_lock->end > smb_lock->start) ||
    + (cmp_lock->start < smb_lock->end && cmp_lock->end >= smb_lock->end)) &&
    + !cmp_lock->zero_len && !smb_lock->zero_len) {
    + ksmbd_err("Not allow lock operation on exclusive lock range\n");
    + rsp->hdr.Status =
    + STATUS_LOCK_NOT_GRANTED;
    + goto out;
    + }
    + }
    +
    + if (smb_lock->fl->fl_type == F_UNLCK && nolock) {
    + ksmbd_err("Try to unlock nolocked range\n");
    + rsp->hdr.Status = STATUS_RANGE_NOT_LOCKED;
    + goto out;
    + }
    +
    +no_check_gl:
    + if (smb_lock->zero_len) {
    + err = 0;
    + goto skip;
    + }
    +
    + flock = smb_lock->fl;
    + list_del(&smb_lock->llist);
    +retry:
    + err = ksmbd_vfs_lock(filp, smb_lock->cmd, flock);
    +skip:
    + if (flags & SMB2_LOCKFLAG_UNLOCK) {
    + if (!err) {
    + ksmbd_debug(SMB, "File unlocked\n");
    + } else if (err == -ENOENT) {
    + rsp->hdr.Status = STATUS_NOT_LOCKED;
    + goto out;
    + }
    + locks_free_lock(flock);
    + kfree(smb_lock);
    + } else {
    + if (err == FILE_LOCK_DEFERRED) {
    + void **argv;
    +
    + ksmbd_debug(SMB,
    + "would have to wait for getting lock\n");
    + list_add_tail(&smb_lock->glist,
    + &global_lock_list);
    + list_add(&smb_lock->llist, &rollback_list);
    +
    + argv = kmalloc(sizeof(void *), GFP_KERNEL);
    + if (!argv) {
    + err = -ENOMEM;
    + goto out;
    + }
    + argv[0] = flock;
    +
    + err = setup_async_work(work,
    + smb2_remove_blocked_lock,
    + argv);
    + if (err) {
    + rsp->hdr.Status =
    + STATUS_INSUFFICIENT_RESOURCES;
    + goto out;
    + }
    + spin_lock(&fp->f_lock);
    + list_add(&work->fp_entry, &fp->blocked_works);
    + spin_unlock(&fp->f_lock);
    +
    + smb2_send_interim_resp(work, STATUS_PENDING);
    +
    + err = ksmbd_vfs_posix_lock_wait(flock);
    +
    + if (!WORK_ACTIVE(work)) {
    + list_del(&smb_lock->llist);
    + list_del(&smb_lock->glist);
    + locks_free_lock(flock);
    +
    + if (WORK_CANCELLED(work)) {
    + spin_lock(&fp->f_lock);
    + list_del(&work->fp_entry);
    + spin_unlock(&fp->f_lock);
    + rsp->hdr.Status =
    + STATUS_CANCELLED;
    + kfree(smb_lock);
    + smb2_send_interim_resp(work,
    + STATUS_CANCELLED);
    + work->send_no_response = 1;
    + goto out;
    + }
    + init_smb2_rsp_hdr(work);
    + smb2_set_err_rsp(work);
    + rsp->hdr.Status =
    + STATUS_RANGE_NOT_LOCKED;
    + kfree(smb_lock);
    + goto out2;
    + }
    +
    + list_del(&smb_lock->llist);
    + list_del(&smb_lock->glist);
    + spin_lock(&fp->f_lock);
    + list_del(&work->fp_entry);
    + spin_unlock(&fp->f_lock);
    + goto retry;
    + } else if (!err) {
    + list_add_tail(&smb_lock->glist,
    + &global_lock_list);
    + list_add(&smb_lock->llist, &rollback_list);
    + ksmbd_debug(SMB, "successful in taking lock\n");
    + } else {
    + rsp->hdr.Status = STATUS_LOCK_NOT_GRANTED;
    + goto out;
    + }
    + }
    + }
    +
    + if (atomic_read(&fp->f_ci->op_count) > 1)
    + smb_break_all_oplock(work, fp);
    +
    + rsp->StructureSize = cpu_to_le16(4);
    + ksmbd_debug(SMB, "successful in taking lock\n");
    + rsp->hdr.Status = STATUS_SUCCESS;
    + rsp->Reserved = 0;
    + inc_rfc1001_len(rsp, 4);
    + ksmbd_fd_put(work, fp);
    + return err;
    +
    +out:
    + list_for_each_entry_safe(smb_lock, tmp, &lock_list, llist) {
    + locks_free_lock(smb_lock->fl);
    + list_del(&smb_lock->llist);
    + kfree(smb_lock);
    + }
    +
    + list_for_each_entry_safe(smb_lock, tmp, &rollback_list, llist) {
    + struct file_lock *rlock = NULL;
    +
    + rlock = smb_flock_init(filp);
    + rlock->fl_type = F_UNLCK;
    + rlock->fl_start = smb_lock->start;
    + rlock->fl_end = smb_lock->end;
    +
    + err = ksmbd_vfs_lock(filp, 0, rlock);
    + if (err)
    + ksmbd_err("rollback unlock fail : %d\n", err);
    + list_del(&smb_lock->llist);
    + list_del(&smb_lock->glist);
    + locks_free_lock(smb_lock->fl);
    + locks_free_lock(rlock);
    + kfree(smb_lock);
    + }
    +out2:
    + ksmbd_debug(SMB, "failed in taking lock(flags : %x)\n", flags);
    + smb2_set_err_rsp(work);
    + ksmbd_fd_put(work, fp);
    + return 0;
    +}
    +
    +static int fsctl_copychunk(struct ksmbd_work *work, struct smb2_ioctl_req *req,
    + struct smb2_ioctl_rsp *rsp)
    +{
    + struct copychunk_ioctl_req *ci_req;
    + struct copychunk_ioctl_rsp *ci_rsp;
    + struct ksmbd_file *src_fp = NULL, *dst_fp = NULL;
    + struct srv_copychunk *chunks;
    + unsigned int i, chunk_count, chunk_count_written = 0;
    + unsigned int chunk_size_written = 0;
    + loff_t total_size_written = 0;
    + int ret, cnt_code;
    +
    + cnt_code = le32_to_cpu(req->CntCode);
    + ci_req = (struct copychunk_ioctl_req *)&req->Buffer[0];
    + ci_rsp = (struct copychunk_ioctl_rsp *)&rsp->Buffer[0];
    +
    + rsp->VolatileFileId = req->VolatileFileId;
    + rsp->PersistentFileId = req->PersistentFileId;
    + ci_rsp->ChunksWritten =
    + cpu_to_le32(ksmbd_server_side_copy_max_chunk_count());
    + ci_rsp->ChunkBytesWritten =
    + cpu_to_le32(ksmbd_server_side_copy_max_chunk_size());
    + ci_rsp->TotalBytesWritten =
    + cpu_to_le32(ksmbd_server_side_copy_max_total_size());
    +
    + chunks = (struct srv_copychunk *)&ci_req->Chunks[0];
    + chunk_count = le32_to_cpu(ci_req->ChunkCount);
    + total_size_written = 0;
    +
    + /* verify the SRV_COPYCHUNK_COPY packet */
    + if (chunk_count > ksmbd_server_side_copy_max_chunk_count() ||
    + le32_to_cpu(req->InputCount) <
    + offsetof(struct copychunk_ioctl_req, Chunks) +
    + chunk_count * sizeof(struct srv_copychunk)) {
    + rsp->hdr.Status = STATUS_INVALID_PARAMETER;
    + return -EINVAL;
    + }
    +
    + for (i = 0; i < chunk_count; i++) {
    + if (le32_to_cpu(chunks[i].Length) == 0 ||
    + le32_to_cpu(chunks[i].Length) > ksmbd_server_side_copy_max_chunk_size())
    + break;
    + total_size_written += le32_to_cpu(chunks[i].Length);
    + }
    +
    + if (i < chunk_count ||
    + total_size_written > ksmbd_server_side_copy_max_total_size()) {
    + rsp->hdr.Status = STATUS_INVALID_PARAMETER;
    + return -EINVAL;
    + }
    +
    + src_fp = ksmbd_lookup_foreign_fd(work,
    + le64_to_cpu(ci_req->ResumeKey[0]));
    + dst_fp = ksmbd_lookup_fd_slow(work,
    + le64_to_cpu(req->VolatileFileId),
    + le64_to_cpu(req->PersistentFileId));
    + ret = -EINVAL;
    + if (!src_fp ||
    + src_fp->persistent_id != le64_to_cpu(ci_req->ResumeKey[1])) {
    + rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND;
    + goto out;
    + }
    +
    + if (!dst_fp) {
    + rsp->hdr.Status = STATUS_FILE_CLOSED;
    + goto out;
    + }
    +
    + /*
    + * FILE_READ_DATA should only be included in
    + * the FSCTL_COPYCHUNK case
    + */
    + if (cnt_code == FSCTL_COPYCHUNK &&
    + !(dst_fp->daccess & (FILE_READ_DATA_LE | FILE_GENERIC_READ_LE))) {
    + rsp->hdr.Status = STATUS_ACCESS_DENIED;
    + goto out;
    + }
    +
    + ret = ksmbd_vfs_copy_file_ranges(work, src_fp, dst_fp,
    + chunks, chunk_count,
    + &chunk_count_written,
    + &chunk_size_written,
    + &total_size_written);
    + if (ret < 0) {
    + if (ret == -EACCES)
    + rsp->hdr.Status = STATUS_ACCESS_DENIED;
    + if (ret == -EAGAIN)
    + rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
    + else if (ret == -EBADF)
    + rsp->hdr.Status = STATUS_INVALID_HANDLE;
    + else if (ret == -EFBIG || ret == -ENOSPC)
    + rsp->hdr.Status = STATUS_DISK_FULL;
    + else if (ret == -EINVAL)
    + rsp->hdr.Status = STATUS_INVALID_PARAMETER;
    + else if (ret == -EISDIR)
    + rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY;
    + else if (ret == -E2BIG)
    + rsp->hdr.Status = STATUS_INVALID_VIEW_SIZE;
    + else
    + rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
    + }
    +
    + ci_rsp->ChunksWritten = cpu_to_le32(chunk_count_written);
    + ci_rsp->ChunkBytesWritten = cpu_to_le32(chunk_size_written);
    + ci_rsp->TotalBytesWritten = cpu_to_le32(total_size_written);
    +out:
    + ksmbd_fd_put(work, src_fp);
    + ksmbd_fd_put(work, dst_fp);
    + return ret;
    +}
    +
    +static __be32 idev_ipv4_address(struct in_device *idev)
    +{
    + __be32 addr = 0;
    +
    + struct in_ifaddr *ifa;
    +
    + rcu_read_lock();
    + in_dev_for_each_ifa_rcu(ifa, idev) {
    + if (ifa->ifa_flags & IFA_F_SECONDARY)
    + continue;
    +
    + addr = ifa->ifa_address;
    + break;
    + }
    + rcu_read_unlock();
    + return addr;
    +}
    +
    +static int fsctl_query_iface_info_ioctl(struct ksmbd_conn *conn,
    + struct smb2_ioctl_req *req,
    + struct smb2_ioctl_rsp *rsp)
    +{
    + struct network_interface_info_ioctl_rsp *nii_rsp = NULL;
    + int nbytes = 0;
    + struct net_device *netdev;
    + struct sockaddr_storage_rsp *sockaddr_storage;
    + unsigned int flags;
    + unsigned long long speed;
    +
    + rtnl_lock();
    + for_each_netdev(&init_net, netdev) {
    + if (unlikely(!netdev)) {
    + rtnl_unlock();
    + return -EINVAL;
    + }
    +
    + if (netdev->type == ARPHRD_LOOPBACK)
    + continue;
    +
    + flags = dev_get_flags(netdev);
    + if (!(flags & IFF_RUNNING))
    + continue;
    +
    + nii_rsp = (struct network_interface_info_ioctl_rsp *)
    + &rsp->Buffer[nbytes];
    + nii_rsp->IfIndex = cpu_to_le32(netdev->ifindex);
    +
    + /* TODO: specify the RDMA capabilities */
    + if (netdev->num_tx_queues > 1)
    + nii_rsp->Capability = cpu_to_le32(RSS_CAPABLE);
    + else
    + nii_rsp->Capability = 0;
    +
    + nii_rsp->Next = cpu_to_le32(152);
    + nii_rsp->Reserved = 0;
    +
    + if (netdev->ethtool_ops->get_link_ksettings) {
    + struct ethtool_link_ksettings cmd;
    +
    + netdev->ethtool_ops->get_link_ksettings(netdev, &cmd);
    + speed = cmd.base.speed;
    + } else {
    + ksmbd_err("%s %s\n", netdev->name,
    + "speed is unknown, defaulting to 1Gb/sec");
    + speed = SPEED_1000;
    + }
    +
    + speed *= 1000000;
    + nii_rsp->LinkSpeed = cpu_to_le64(speed);
    +
    + sockaddr_storage = (struct sockaddr_storage_rsp *)
    + nii_rsp->SockAddr_Storage;
    + memset(sockaddr_storage, 0, 128);
    +
    + if (conn->peer_addr.ss_family == PF_INET) {
    + struct in_device *idev;
    +
    + sockaddr_storage->Family = cpu_to_le16(INTERNETWORK);
    + sockaddr_storage->addr4.Port = 0;
    +
    + idev = __in_dev_get_rtnl(netdev);
    + if (!idev)
    + continue;
    + sockaddr_storage->addr4.IPv4address =
    + idev_ipv4_address(idev);
    + } else {
    + struct inet6_dev *idev6;
    + struct inet6_ifaddr *ifa;
    + __u8 *ipv6_addr = sockaddr_storage->addr6.IPv6address;
    +
    + sockaddr_storage->Family = cpu_to_le16(INTERNETWORKV6);
    + sockaddr_storage->addr6.Port = 0;
    + sockaddr_storage->addr6.FlowInfo = 0;
    +
    + idev6 = __in6_dev_get(netdev);
    + if (!idev6)
    + continue;
    +
    + list_for_each_entry(ifa, &idev6->addr_list, if_list) {
    + if (ifa->flags & (IFA_F_TENTATIVE |
    + IFA_F_DEPRECATED))
    + continue;
    + memcpy(ipv6_addr, ifa->addr.s6_addr, 16);
    + break;
    + }
    + sockaddr_storage->addr6.ScopeId = 0;
    + }
    +
    + nbytes += sizeof(struct network_interface_info_ioctl_rsp);
    + }
    + rtnl_unlock();
    +
    + /* zero if this is last one */
    + if (nii_rsp)
    + nii_rsp->Next = 0;
    +
    + if (!nbytes) {
    + rsp->hdr.Status = STATUS_BUFFER_TOO_SMALL;
    + return -EINVAL;
    + }
    +
    + rsp->PersistentFileId = cpu_to_le64(SMB2_NO_FID);
    + rsp->VolatileFileId = cpu_to_le64(SMB2_NO_FID);
    + return nbytes;
    +}
    +
    +static int fsctl_validate_negotiate_info(struct ksmbd_conn *conn,
    + struct validate_negotiate_info_req *neg_req,
    + struct validate_negotiate_info_rsp *neg_rsp)
    +{
    + int ret = 0;
    + int dialect;
    +
    + dialect = ksmbd_lookup_dialect_by_id(neg_req->Dialects,
    + neg_req->DialectCount);
    + if (dialect == BAD_PROT_ID || dialect != conn->dialect) {
    + ret = -EINVAL;
    + goto err_out;
    + }
    +
    + if (strncmp(neg_req->Guid, conn->ClientGUID, SMB2_CLIENT_GUID_SIZE)) {
    + ret = -EINVAL;
    + goto err_out;
    + }
    +
    + if (le16_to_cpu(neg_req->SecurityMode) != conn->cli_sec_mode) {
    + ret = -EINVAL;
    + goto err_out;
    + }
    +
    + if (le32_to_cpu(neg_req->Capabilities) != conn->cli_cap) {
    + ret = -EINVAL;
    + goto err_out;
    + }
    +
    + neg_rsp->Capabilities = cpu_to_le32(conn->vals->capabilities);
    + memset(neg_rsp->Guid, 0, SMB2_CLIENT_GUID_SIZE);
    + neg_rsp->SecurityMode = cpu_to_le16(conn->srv_sec_mode);
    + neg_rsp->Dialect = cpu_to_le16(conn->dialect);
    +err_out:
    + return ret;
    +}
    +
    +static int fsctl_query_allocated_ranges(struct ksmbd_work *work, u64 id,
    + struct file_allocated_range_buffer *qar_req,
    + struct file_allocated_range_buffer *qar_rsp,
    + int in_count, int *out_count)
    +{
    + struct ksmbd_file *fp;
    + loff_t start, length;
    + int ret = 0;
    +
    + *out_count = 0;
    + if (in_count == 0)
    + return -EINVAL;
    +
    + fp = ksmbd_lookup_fd_fast(work, id);
    + if (!fp)
    + return -ENOENT;
    +
    + start = le64_to_cpu(qar_req->file_offset);
    + length = le64_to_cpu(qar_req->length);
    +
    + ret = ksmbd_vfs_fqar_lseek(fp, start, length,
    + qar_rsp, in_count, out_count);
    + if (ret && ret != -E2BIG)
    + *out_count = 0;
    +
    + ksmbd_fd_put(work, fp);
    + return ret;
    +}
    +
    +static int fsctl_pipe_transceive(struct ksmbd_work *work, u64 id,
    + int out_buf_len, struct smb2_ioctl_req *req,
    + struct smb2_ioctl_rsp *rsp)
    +{
    + struct ksmbd_rpc_command *rpc_resp;
    + char *data_buf = (char *)&req->Buffer[0];
    + int nbytes = 0;
    +
    + rpc_resp = ksmbd_rpc_ioctl(work->sess, id, data_buf,
    + le32_to_cpu(req->InputCount));
    + if (rpc_resp) {
    + if (rpc_resp->flags == KSMBD_RPC_SOME_NOT_MAPPED) {
    + /*
    + * set STATUS_SOME_NOT_MAPPED response
    + * for unknown domain sid.
    + */
    + rsp->hdr.Status = STATUS_SOME_NOT_MAPPED;
    + } else if (rpc_resp->flags == KSMBD_RPC_ENOTIMPLEMENTED) {
    + rsp->hdr.Status = STATUS_NOT_SUPPORTED;
    + goto out;
    + } else if (rpc_resp->flags != KSMBD_RPC_OK) {
    + rsp->hdr.Status = STATUS_INVALID_PARAMETER;
    + goto out;
    + }
    +
    + nbytes = rpc_resp->payload_sz;
    + if (rpc_resp->payload_sz > out_buf_len) {
    + rsp->hdr.Status = STATUS_BUFFER_OVERFLOW;
    + nbytes = out_buf_len;
    + }
    +
    + if (!rpc_resp->payload_sz) {
    + rsp->hdr.Status =
    + STATUS_UNEXPECTED_IO_ERROR;
    + goto out;
    + }
    +
    + memcpy((char *)rsp->Buffer, rpc_resp->payload, nbytes);
    + }
    +out:
    + kvfree(rpc_resp);
    + return nbytes;
    +}
    +
    +static inline int fsctl_set_sparse(struct ksmbd_work *work, u64 id,
    + struct file_sparse *sparse)
    +{
    + struct ksmbd_file *fp;
    + int ret = 0;
    + __le32 old_fattr;
    +
    + fp = ksmbd_lookup_fd_fast(work, id);
    + if (!fp)
    + return -ENOENT;
    +
    + old_fattr = fp->f_ci->m_fattr;
    + if (sparse->SetSparse)
    + fp->f_ci->m_fattr |= ATTR_SPARSE_FILE_LE;
    + else
    + fp->f_ci->m_fattr &= ~ATTR_SPARSE_FILE_LE;
    +
    + if (fp->f_ci->m_fattr != old_fattr &&
    + test_share_config_flag(work->tcon->share_conf,
    + KSMBD_SHARE_FLAG_STORE_DOS_ATTRS)) {
    + struct xattr_dos_attrib da;
    +
    + ret = ksmbd_vfs_get_dos_attrib_xattr(fp->filp->f_path.dentry, &da);
    + if (ret <= 0)
    + goto out;
    +
    + da.attr = le32_to_cpu(fp->f_ci->m_fattr);
    + ret = ksmbd_vfs_set_dos_attrib_xattr(fp->filp->f_path.dentry, &da);
    + if (ret)
    + fp->f_ci->m_fattr = old_fattr;
    + }
    +
    +out:
    + ksmbd_fd_put(work, fp);
    + return ret;
    +}
    +
    +static int fsctl_request_resume_key(struct ksmbd_work *work,
    + struct smb2_ioctl_req *req,
    + struct resume_key_ioctl_rsp *key_rsp)
    +{
    + struct ksmbd_file *fp;
    +
    + fp = ksmbd_lookup_fd_slow(work,
    + le64_to_cpu(req->VolatileFileId),
    + le64_to_cpu(req->PersistentFileId));
    + if (!fp)
    + return -ENOENT;
    +
    + memset(key_rsp, 0, sizeof(*key_rsp));
    + key_rsp->ResumeKey[0] = req->VolatileFileId;
    + key_rsp->ResumeKey[1] = req->PersistentFileId;
    + ksmbd_fd_put(work, fp);
    +
    + return 0;
    +}
    +
    +/**
    + * smb2_ioctl() - handler for smb2 ioctl command
    + * @work: smb work containing ioctl command buffer
    + *
    + * Return: 0 on success, otherwise error
    + */
    +int smb2_ioctl(struct ksmbd_work *work)
    +{
    + struct smb2_ioctl_req *req;
    + struct smb2_ioctl_rsp *rsp, *rsp_org;
    + int cnt_code, nbytes = 0;
    + int out_buf_len;
    + u64 id = KSMBD_NO_FID;
    + struct ksmbd_conn *conn = work->conn;
    + int ret = 0;
    +
    + rsp_org = work->response_buf;
    + if (work->next_smb2_rcv_hdr_off) {
    + req = REQUEST_BUF_NEXT(work);
    + rsp = RESPONSE_BUF_NEXT(work);
    + if (!HAS_FILE_ID(le64_to_cpu(req->VolatileFileId))) {
    + ksmbd_debug(SMB, "Compound request set FID = %u\n",
    + work->compound_fid);
    + id = work->compound_fid;
    + }
    + } else {
    + req = work->request_buf;
    + rsp = work->response_buf;
    + }
    +
    + if (!HAS_FILE_ID(id))
    + id = le64_to_cpu(req->VolatileFileId);
    +
    + if (req->Flags != cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL)) {
    + rsp->hdr.Status = STATUS_NOT_SUPPORTED;
    + goto out;
    + }
    +
    + cnt_code = le32_to_cpu(req->CntCode);
    + out_buf_len = le32_to_cpu(req->MaxOutputResponse);
    + out_buf_len = min(KSMBD_IPC_MAX_PAYLOAD, out_buf_len);
    +
    + switch (cnt_code) {
    + case FSCTL_DFS_GET_REFERRALS:
    + case FSCTL_DFS_GET_REFERRALS_EX:
    + /* Not support DFS yet */
    + rsp->hdr.Status = STATUS_FS_DRIVER_REQUIRED;
    + goto out;
    + case FSCTL_CREATE_OR_GET_OBJECT_ID:
    + {
    + struct file_object_buf_type1_ioctl_rsp *obj_buf;
    +
    + nbytes = sizeof(struct file_object_buf_type1_ioctl_rsp);
    + obj_buf = (struct file_object_buf_type1_ioctl_rsp *)
    + &rsp->Buffer[0];
    +
    + /*
    + * TODO: This is dummy implementation to pass smbtorture
    + * Need to check correct response later
    + */
    + memset(obj_buf->ObjectId, 0x0, 16);
    + memset(obj_buf->BirthVolumeId, 0x0, 16);
    + memset(obj_buf->BirthObjectId, 0x0, 16);
    + memset(obj_buf->DomainId, 0x0, 16);
    +
    + break;
    + }
    + case FSCTL_PIPE_TRANSCEIVE:
    + nbytes = fsctl_pipe_transceive(work, id, out_buf_len, req, rsp);
    + break;
    + case FSCTL_VALIDATE_NEGOTIATE_INFO:
    + if (conn->dialect < SMB30_PROT_ID) {
    + ret = -EOPNOTSUPP;
    + goto out;
    + }
    +
    + ret = fsctl_validate_negotiate_info(conn,
    + (struct validate_negotiate_info_req *)&req->Buffer[0],
    + (struct validate_negotiate_info_rsp *)&rsp->Buffer[0]);
    + if (ret < 0)
    + goto out;
    +
    + nbytes = sizeof(struct validate_negotiate_info_rsp);
    + rsp->PersistentFileId = cpu_to_le64(SMB2_NO_FID);
    + rsp->VolatileFileId = cpu_to_le64(SMB2_NO_FID);
    + break;
    + case FSCTL_QUERY_NETWORK_INTERFACE_INFO:
    + nbytes = fsctl_query_iface_info_ioctl(conn, req, rsp);
    + if (nbytes < 0)
    + goto out;
    + break;
    + case FSCTL_REQUEST_RESUME_KEY:
    + if (out_buf_len < sizeof(struct resume_key_ioctl_rsp)) {
    + ret = -EINVAL;
    + goto out;
    + }
    +
    + ret = fsctl_request_resume_key(work, req,
    + (struct resume_key_ioctl_rsp *)&rsp->Buffer[0]);
    + if (ret < 0)
    + goto out;
    + rsp->PersistentFileId = req->PersistentFileId;
    + rsp->VolatileFileId = req->VolatileFileId;
    + nbytes = sizeof(struct resume_key_ioctl_rsp);
    + break;
    + case FSCTL_COPYCHUNK:
    + case FSCTL_COPYCHUNK_WRITE:
    + if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
    + ksmbd_debug(SMB,
    + "User does not have write permission\n");
    + ret = -EACCES;
    + goto out;
    + }
    +
    + if (out_buf_len < sizeof(struct copychunk_ioctl_rsp)) {
    + ret = -EINVAL;
    + goto out;
    + }
    +
    + nbytes = sizeof(struct copychunk_ioctl_rsp);
    + fsctl_copychunk(work, req, rsp);
    + break;
    + case FSCTL_SET_SPARSE:
    + ret = fsctl_set_sparse(work, id,
    + (struct file_sparse *)&req->Buffer[0]);
    + if (ret < 0)
    + goto out;
    + break;
    + case FSCTL_SET_ZERO_DATA:
    + {
    + struct file_zero_data_information *zero_data;
    + struct ksmbd_file *fp;
    + loff_t off, len;
    +
    + if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
    + ksmbd_debug(SMB,
    + "User does not have write permission\n");
    + ret = -EACCES;
    + goto out;
    + }
    +
    + zero_data =
    + (struct file_zero_data_information *)&req->Buffer[0];
    +
    + fp = ksmbd_lookup_fd_fast(work, id);
    + if (!fp) {
    + ret = -ENOENT;
    + goto out;
    + }
    +
    + off = le64_to_cpu(zero_data->FileOffset);
    + len = le64_to_cpu(zero_data->BeyondFinalZero) - off;
    +
    + ret = ksmbd_vfs_zero_data(work, fp, off, len);
    + ksmbd_fd_put(work, fp);
    + if (ret < 0)
    + goto out;
    + break;
    + }
    + case FSCTL_QUERY_ALLOCATED_RANGES:
    + ret = fsctl_query_allocated_ranges(work, id,
    + (struct file_allocated_range_buffer *)&req->Buffer[0],
    + (struct file_allocated_range_buffer *)&rsp->Buffer[0],
    + out_buf_len /
    + sizeof(struct file_allocated_range_buffer), &nbytes);
    + if (ret == -E2BIG) {
    + rsp->hdr.Status = STATUS_BUFFER_OVERFLOW;
    + } else if (ret < 0) {
    + nbytes = 0;
    + goto out;
    + }
    +
    + nbytes *= sizeof(struct file_allocated_range_buffer);
    + break;
    + case FSCTL_GET_REPARSE_POINT:
    + {
    + struct reparse_data_buffer *reparse_ptr;
    + struct ksmbd_file *fp;
    +
    + reparse_ptr = (struct reparse_data_buffer *)&rsp->Buffer[0];
    + fp = ksmbd_lookup_fd_fast(work, id);
    + if (!fp) {
    + ksmbd_err("not found fp!!\n");
    + ret = -ENOENT;
    + goto out;
    + }
    +
    + reparse_ptr->ReparseTag =
    + smb2_get_reparse_tag_special_file(FP_INODE(fp)->i_mode);
    + reparse_ptr->ReparseDataLength = 0;
    + ksmbd_fd_put(work, fp);
    + nbytes = sizeof(struct reparse_data_buffer);
    + break;
    + }
    + case FSCTL_DUPLICATE_EXTENTS_TO_FILE:
    + {
    + struct ksmbd_file *fp_in, *fp_out = NULL;
    + struct duplicate_extents_to_file *dup_ext;
    + loff_t src_off, dst_off, length, cloned;
    +
    + dup_ext = (struct duplicate_extents_to_file *)&req->Buffer[0];
    +
    + fp_in = ksmbd_lookup_fd_slow(work, dup_ext->VolatileFileHandle,
    + dup_ext->PersistentFileHandle);
    + if (!fp_in) {
    + ksmbd_err("not found file handle in duplicate extent to file\n");
    + ret = -ENOENT;
    + goto out;
    + }
    +
    + fp_out = ksmbd_lookup_fd_fast(work, id);
    + if (!fp_out) {
    + ksmbd_err("not found fp\n");
    + ret = -ENOENT;
    + goto dup_ext_out;
    + }
    +
    + src_off = le64_to_cpu(dup_ext->SourceFileOffset);
    + dst_off = le64_to_cpu(dup_ext->TargetFileOffset);
    + length = le64_to_cpu(dup_ext->ByteCount);
    + cloned = vfs_clone_file_range(fp_in->filp, src_off, fp_out->filp,
    + dst_off, length, 0);
    + if (cloned == -EXDEV || cloned == -EOPNOTSUPP) {
    + ret = -EOPNOTSUPP;
    + goto dup_ext_out;
    + } else if (cloned != length) {
    + cloned = ksmbd_vfs_copy_file_range(fp_in->filp, src_off,
    + fp_out->filp, dst_off, length);
    + if (cloned != length) {
    + if (cloned < 0)
    + ret = cloned;
    + else
    + ret = -EINVAL;
    + }
    + }
    +
    +dup_ext_out:
    + ksmbd_fd_put(work, fp_in);
    + ksmbd_fd_put(work, fp_out);
    + if (ret < 0)
    + goto out;
    + break;
    + }
    + default:
    + ksmbd_debug(SMB, "not implemented yet ioctl command 0x%x\n",
    + cnt_code);
    + ret = -EOPNOTSUPP;
    + goto out;
    + }
    +
    + rsp->CntCode = cpu_to_le32(cnt_code);
    + rsp->InputCount = cpu_to_le32(0);
    + rsp->InputOffset = cpu_to_le32(112);
    + rsp->OutputOffset = cpu_to_le32(112);
    + rsp->OutputCount = cpu_to_le32(nbytes);
    + rsp->StructureSize = cpu_to_le16(49);
    + rsp->Reserved = cpu_to_le16(0);
    + rsp->Flags = cpu_to_le32(0);
    + rsp->Reserved2 = cpu_to_le32(0);
    + inc_rfc1001_len(rsp_org, 48 + nbytes);
    +
    + return 0;
    +
    +out:
    + if (ret == -EACCES)
    + rsp->hdr.Status = STATUS_ACCESS_DENIED;
    + else if (ret == -ENOENT)
    + rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND;
    + else if (ret == -EOPNOTSUPP)
    + rsp->hdr.Status = STATUS_NOT_SUPPORTED;
    + else if (ret < 0 || rsp->hdr.Status == 0)
    + rsp->hdr.Status = STATUS_INVALID_PARAMETER;
    + smb2_set_err_rsp(work);
    + return 0;
    +}
    +
    +/**
    + * smb20_oplock_break_ack() - handler for smb2.0 oplock break command
    + * @work: smb work containing oplock break command buffer
    + *
    + * Return: 0
    + */
    +static void smb20_oplock_break_ack(struct ksmbd_work *work)
    +{
    + struct smb2_oplock_break *req = work->request_buf;
    + struct smb2_oplock_break *rsp = work->response_buf;
    + struct ksmbd_file *fp;
    + struct oplock_info *opinfo = NULL;
    + __le32 err = 0;
    + int ret = 0;
    + u64 volatile_id, persistent_id;
    + char req_oplevel = 0, rsp_oplevel = 0;
    + unsigned int oplock_change_type;
    +
    + volatile_id = le64_to_cpu(req->VolatileFid);
    + persistent_id = le64_to_cpu(req->PersistentFid);
    + req_oplevel = req->OplockLevel;
    + ksmbd_debug(OPLOCK, "v_id %llu, p_id %llu request oplock level %d\n",
    + volatile_id, persistent_id, req_oplevel);
    +
    + fp = ksmbd_lookup_fd_slow(work, volatile_id, persistent_id);
    + if (!fp) {
    + rsp->hdr.Status = STATUS_FILE_CLOSED;
    + smb2_set_err_rsp(work);
    + return;
    + }
    +
    + opinfo = opinfo_get(fp);
    + if (!opinfo) {
    + ksmbd_err("unexpected null oplock_info\n");
    + rsp->hdr.Status = STATUS_INVALID_OPLOCK_PROTOCOL;
    + smb2_set_err_rsp(work);
    + ksmbd_fd_put(work, fp);
    + return;
    + }
    +
    + if (opinfo->level == SMB2_OPLOCK_LEVEL_NONE) {
    + rsp->hdr.Status = STATUS_INVALID_OPLOCK_PROTOCOL;
    + goto err_out;
    + }
    +
    + if (opinfo->op_state == OPLOCK_STATE_NONE) {
    + ksmbd_debug(SMB, "unexpected oplock state 0x%x\n", opinfo->op_state);
    + rsp->hdr.Status = STATUS_UNSUCCESSFUL;
    + goto err_out;
    + }
    +
    + if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE ||
    + opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) &&
    + (req_oplevel != SMB2_OPLOCK_LEVEL_II &&
    + req_oplevel != SMB2_OPLOCK_LEVEL_NONE)) {
    + err = STATUS_INVALID_OPLOCK_PROTOCOL;
    + oplock_change_type = OPLOCK_WRITE_TO_NONE;
    + } else if (opinfo->level == SMB2_OPLOCK_LEVEL_II &&
    + req_oplevel != SMB2_OPLOCK_LEVEL_NONE) {
    + err = STATUS_INVALID_OPLOCK_PROTOCOL;
    + oplock_change_type = OPLOCK_READ_TO_NONE;
    + } else if (req_oplevel == SMB2_OPLOCK_LEVEL_II ||
    + req_oplevel == SMB2_OPLOCK_LEVEL_NONE) {
    + err = STATUS_INVALID_DEVICE_STATE;
    + if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE ||
    + opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) &&
    + req_oplevel == SMB2_OPLOCK_LEVEL_II) {
    + oplock_change_type = OPLOCK_WRITE_TO_READ;
    + } else if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE ||
    + opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) &&
    + req_oplevel == SMB2_OPLOCK_LEVEL_NONE) {
    + oplock_change_type = OPLOCK_WRITE_TO_NONE;
    + } else if (opinfo->level == SMB2_OPLOCK_LEVEL_II &&
    + req_oplevel == SMB2_OPLOCK_LEVEL_NONE) {
    + oplock_change_type = OPLOCK_READ_TO_NONE;
    + } else {
    + oplock_change_type = 0;
    + }
    + } else {
    + oplock_change_type = 0;
    + }
    +
    + switch (oplock_change_type) {
    + case OPLOCK_WRITE_TO_READ:
    + ret = opinfo_write_to_read(opinfo);
    + rsp_oplevel = SMB2_OPLOCK_LEVEL_II;
    + break;
    + case OPLOCK_WRITE_TO_NONE:
    + ret = opinfo_write_to_none(opinfo);
    + rsp_oplevel = SMB2_OPLOCK_LEVEL_NONE;
    + break;
    + case OPLOCK_READ_TO_NONE:
    + ret = opinfo_read_to_none(opinfo);
    + rsp_oplevel = SMB2_OPLOCK_LEVEL_NONE;
    + break;
    + default:
    + ksmbd_err("unknown oplock change 0x%x -> 0x%x\n",
    + opinfo->level, rsp_oplevel);
    + }
    +
    + if (ret < 0) {
    + rsp->hdr.Status = err;
    + goto err_out;
    + }
    +
    + opinfo_put(opinfo);
    + ksmbd_fd_put(work, fp);
    + opinfo->op_state = OPLOCK_STATE_NONE;
    + wake_up_interruptible_all(&opinfo->oplock_q);
    +
    + rsp->StructureSize = cpu_to_le16(24);
    + rsp->OplockLevel = rsp_oplevel;
    + rsp->Reserved = 0;
    + rsp->Reserved2 = 0;
    + rsp->VolatileFid = cpu_to_le64(volatile_id);
    + rsp->PersistentFid = cpu_to_le64(persistent_id);
    + inc_rfc1001_len(rsp, 24);
    + return;
    +
    +err_out:
    + opinfo->op_state = OPLOCK_STATE_NONE;
    + wake_up_interruptible_all(&opinfo->oplock_q);
    +
    + opinfo_put(opinfo);
    + ksmbd_fd_put(work, fp);
    + smb2_set_err_rsp(work);
    +}
    +
    +static int check_lease_state(struct lease *lease, __le32 req_state)
    +{
    + if ((lease->new_state ==
    + (SMB2_LEASE_READ_CACHING_LE | SMB2_LEASE_HANDLE_CACHING_LE)) &&
    + !(req_state & SMB2_LEASE_WRITE_CACHING_LE)) {
    + lease->new_state = req_state;
    + return 0;
    + }
    +
    + if (lease->new_state == req_state)
    + return 0;
    +
    + return 1;
    +}
    +
    +/**
    + * smb21_lease_break_ack() - handler for smb2.1 lease break command
    + * @work: smb work containing lease break command buffer
    + *
    + * Return: 0
    + */
    +static void smb21_lease_break_ack(struct ksmbd_work *work)
    +{
    + struct ksmbd_conn *conn = work->conn;
    + struct smb2_lease_ack *req = work->request_buf;
    + struct smb2_lease_ack *rsp = work->response_buf;
    + struct oplock_info *opinfo;
    + __le32 err = 0;
    + int ret = 0;
    + unsigned int lease_change_type;
    + __le32 lease_state;
    + struct lease *lease;
    +
    + ksmbd_debug(OPLOCK, "smb21 lease break, lease state(0x%x)\n",
    + le32_to_cpu(req->LeaseState));
    + opinfo = lookup_lease_in_table(conn, req->LeaseKey);
    + if (!opinfo) {
    + ksmbd_debug(OPLOCK, "file not opened\n");
    + smb2_set_err_rsp(work);
    + rsp->hdr.Status = STATUS_UNSUCCESSFUL;
    + return;
    + }
    + lease = opinfo->o_lease;
    +
    + if (opinfo->op_state == OPLOCK_STATE_NONE) {
    + ksmbd_err("unexpected lease break state 0x%x\n",
    + opinfo->op_state);
    + rsp->hdr.Status = STATUS_UNSUCCESSFUL;
    + goto err_out;
    + }
    +
    + if (check_lease_state(lease, req->LeaseState)) {
    + rsp->hdr.Status = STATUS_REQUEST_NOT_ACCEPTED;
    + ksmbd_debug(OPLOCK,
    + "req lease state: 0x%x, expected state: 0x%x\n",
    + req->LeaseState, lease->new_state);
    + goto err_out;
    + }
    +
    + if (!atomic_read(&opinfo->breaking_cnt)) {
    + rsp->hdr.Status = STATUS_UNSUCCESSFUL;
    + goto err_out;
    + }
    +
    + /* check for bad lease state */
    + if (req->LeaseState &
    + (~(SMB2_LEASE_READ_CACHING_LE | SMB2_LEASE_HANDLE_CACHING_LE))) {
    + err = STATUS_INVALID_OPLOCK_PROTOCOL;
    + if (lease->state & SMB2_LEASE_WRITE_CACHING_LE)
    + lease_change_type = OPLOCK_WRITE_TO_NONE;
    + else
    + lease_change_type = OPLOCK_READ_TO_NONE;
    + ksmbd_debug(OPLOCK, "handle bad lease state 0x%x -> 0x%x\n",
    + le32_to_cpu(lease->state),
    + le32_to_cpu(req->LeaseState));
    + } else if (lease->state == SMB2_LEASE_READ_CACHING_LE &&
    + req->LeaseState != SMB2_LEASE_NONE_LE) {
    + err = STATUS_INVALID_OPLOCK_PROTOCOL;
    + lease_change_type = OPLOCK_READ_TO_NONE;
    + ksmbd_debug(OPLOCK, "handle bad lease state 0x%x -> 0x%x\n",
    + le32_to_cpu(lease->state),
    + le32_to_cpu(req->LeaseState));
    + } else {
    + /* valid lease state changes */
    + err = STATUS_INVALID_DEVICE_STATE;
    + if (req->LeaseState == SMB2_LEASE_NONE_LE) {
    + if (lease->state & SMB2_LEASE_WRITE_CACHING_LE)
    + lease_change_type = OPLOCK_WRITE_TO_NONE;
    + else
    + lease_change_type = OPLOCK_READ_TO_NONE;
    + } else if (req->LeaseState & SMB2_LEASE_READ_CACHING_LE) {
    + if (lease->state & SMB2_LEASE_WRITE_CACHING_LE)
    + lease_change_type = OPLOCK_WRITE_TO_READ;
    + else
    + lease_change_type = OPLOCK_READ_HANDLE_TO_READ;
    + } else {
    + lease_change_type = 0;
    + }
    + }
    +
    + switch (lease_change_type) {
    + case OPLOCK_WRITE_TO_READ:
    + ret = opinfo_write_to_read(opinfo);
    + break;
    + case OPLOCK_READ_HANDLE_TO_READ:
    + ret = opinfo_read_handle_to_read(opinfo);
    + break;
    + case OPLOCK_WRITE_TO_NONE:
    + ret = opinfo_write_to_none(opinfo);
    + break;
    + case OPLOCK_READ_TO_NONE:
    + ret = opinfo_read_to_none(opinfo);
    + break;
    + default:
    + ksmbd_debug(OPLOCK, "unknown lease change 0x%x -> 0x%x\n",
    + le32_to_cpu(lease->state),
    + le32_to_cpu(req->LeaseState));
    + }
    +
    + lease_state = lease->state;
    + opinfo->op_state = OPLOCK_STATE_NONE;
    + wake_up_interruptible_all(&opinfo->oplock_q);
    + atomic_dec(&opinfo->breaking_cnt);
    + wake_up_interruptible_all(&opinfo->oplock_brk);
    + opinfo_put(opinfo);
    +
    + if (ret < 0) {
    + rsp->hdr.Status = err;
    + goto err_out;
    + }
    +
    + rsp->StructureSize = cpu_to_le16(36);
    + rsp->Reserved = 0;
    + rsp->Flags = 0;
    + memcpy(rsp->LeaseKey, req->LeaseKey, 16);
    + rsp->LeaseState = lease_state;
    + rsp->LeaseDuration = 0;
    + inc_rfc1001_len(rsp, 36);
    + return;
    +
    +err_out:
    + opinfo->op_state = OPLOCK_STATE_NONE;
    + wake_up_interruptible_all(&opinfo->oplock_q);
    + atomic_dec(&opinfo->breaking_cnt);
    + wake_up_interruptible_all(&opinfo->oplock_brk);
    +
    + opinfo_put(opinfo);
    + smb2_set_err_rsp(work);
    +}
    +
    +/**
    + * smb2_oplock_break() - dispatcher for smb2.0 and 2.1 oplock/lease break
    + * @work: smb work containing oplock/lease break command buffer
    + *
    + * Return: 0
    + */
    +int smb2_oplock_break(struct ksmbd_work *work)
    +{
    + struct smb2_oplock_break *req = work->request_buf;
    + struct smb2_oplock_break *rsp = work->response_buf;
    +
    + switch (le16_to_cpu(req->StructureSize)) {
    + case OP_BREAK_STRUCT_SIZE_20:
    + smb20_oplock_break_ack(work);
    + break;
    + case OP_BREAK_STRUCT_SIZE_21:
    + smb21_lease_break_ack(work);
    + break;
    + default:
    + ksmbd_debug(OPLOCK, "invalid break cmd %d\n",
    + le16_to_cpu(req->StructureSize));
    + rsp->hdr.Status = STATUS_INVALID_PARAMETER;
    + smb2_set_err_rsp(work);
    + }
    +
    + return 0;
    +}
    +
    +/**
    + * smb2_notify() - handler for smb2 notify request
    + * @work: smb work containing notify command buffer
    + *
    + * Return: 0
    + */
    +int smb2_notify(struct ksmbd_work *work)
    +{
    + struct smb2_notify_req *req;
    + struct smb2_notify_rsp *rsp;
    +
    + WORK_BUFFERS(work, req, rsp);
    +
    + if (work->next_smb2_rcv_hdr_off && req->hdr.NextCommand) {
    + rsp->hdr.Status = STATUS_INTERNAL_ERROR;
    + smb2_set_err_rsp(work);
    + return 0;
    + }
    +
    + smb2_set_err_rsp(work);
    + rsp->hdr.Status = STATUS_NOT_IMPLEMENTED;
    + return 0;
    +}
    +
    +/**
    + * smb2_is_sign_req() - handler for checking packet signing status
    + * @work: smb work containing notify command buffer
    + * @command: SMB2 command id
    + *
    + * Return: true if packed is signed, false otherwise
    + */
    +bool smb2_is_sign_req(struct ksmbd_work *work, unsigned int command)
    +{
    + struct smb2_hdr *rcv_hdr2 = work->request_buf;
    +
    + if ((rcv_hdr2->Flags & SMB2_FLAGS_SIGNED) &&
    + command != SMB2_NEGOTIATE_HE &&
    + command != SMB2_SESSION_SETUP_HE &&
    + command != SMB2_OPLOCK_BREAK_HE)
    + return true;
    +
    + return false;
    +}
    +
    +/**
    + * smb2_check_sign_req() - handler for req packet sign processing
    + * @work: smb work containing notify command buffer
    + *
    + * Return: 1 on success, 0 otherwise
    + */
    +int smb2_check_sign_req(struct ksmbd_work *work)
    +{
    + struct smb2_hdr *hdr, *hdr_org;
    + char signature_req[SMB2_SIGNATURE_SIZE];
    + char signature[SMB2_HMACSHA256_SIZE];
    + struct kvec iov[1];
    + size_t len;
    +
    + hdr_org = hdr = work->request_buf;
    + if (work->next_smb2_rcv_hdr_off)
    + hdr = REQUEST_BUF_NEXT(work);
    +
    + if (!hdr->NextCommand && !work->next_smb2_rcv_hdr_off)
    + len = be32_to_cpu(hdr_org->smb2_buf_length);
    + else if (hdr->NextCommand)
    + len = le32_to_cpu(hdr->NextCommand);
    + else
    + len = be32_to_cpu(hdr_org->smb2_buf_length) -
    + work->next_smb2_rcv_hdr_off;
    +
    + memcpy(signature_req, hdr->Signature, SMB2_SIGNATURE_SIZE);
    + memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
    +
    + iov[0].iov_base = (char *)&hdr->ProtocolId;
    + iov[0].iov_len = len;
    +
    + if (ksmbd_sign_smb2_pdu(work->conn, work->sess->sess_key, iov, 1,
    + signature))
    + return 0;
    +
    + if (memcmp(signature, signature_req, SMB2_SIGNATURE_SIZE)) {
    + ksmbd_err("bad smb2 signature\n");
    + return 0;
    + }
    +
    + return 1;
    +}
    +
    +/**
    + * smb2_set_sign_rsp() - handler for rsp packet sign processing
    + * @work: smb work containing notify command buffer
    + *
    + */
    +void smb2_set_sign_rsp(struct ksmbd_work *work)
    +{
    + struct smb2_hdr *hdr, *hdr_org;
    + struct smb2_hdr *req_hdr;
    + char signature[SMB2_HMACSHA256_SIZE];
    + struct kvec iov[2];
    + size_t len;
    + int n_vec = 1;
    +
    + hdr_org = hdr = work->response_buf;
    + if (work->next_smb2_rsp_hdr_off)
    + hdr = RESPONSE_BUF_NEXT(work);
    +
    + req_hdr = REQUEST_BUF_NEXT(work);
    +
    + if (!work->next_smb2_rsp_hdr_off) {
    + len = get_rfc1002_len(hdr_org);
    + if (req_hdr->NextCommand)
    + len = ALIGN(len, 8);
    + } else {
    + len = get_rfc1002_len(hdr_org) - work->next_smb2_rsp_hdr_off;
    + len = ALIGN(len, 8);
    + }
    +
    + if (req_hdr->NextCommand)
    + hdr->NextCommand = cpu_to_le32(len);
    +
    + hdr->Flags |= SMB2_FLAGS_SIGNED;
    + memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
    +
    + iov[0].iov_base = (char *)&hdr->ProtocolId;
    + iov[0].iov_len = len;
    +
    + if (work->aux_payload_sz) {
    + iov[0].iov_len -= work->aux_payload_sz;
    +
    + iov[1].iov_base = work->aux_payload_buf;
    + iov[1].iov_len = work->aux_payload_sz;
    + n_vec++;
    + }
    +
    + if (!ksmbd_sign_smb2_pdu(work->conn, work->sess->sess_key, iov, n_vec,
    + signature))
    + memcpy(hdr->Signature, signature, SMB2_SIGNATURE_SIZE);
    +}
    +
    +/**
    + * smb3_check_sign_req() - handler for req packet sign processing
    + * @work: smb work containing notify command buffer
    + *
    + * Return: 1 on success, 0 otherwise
    + */
    +int smb3_check_sign_req(struct ksmbd_work *work)
    +{
    + struct ksmbd_conn *conn;
    + char *signing_key;
    + struct smb2_hdr *hdr, *hdr_org;
    + struct channel *chann;
    + char signature_req[SMB2_SIGNATURE_SIZE];
    + char signature[SMB2_CMACAES_SIZE];
    + struct kvec iov[1];
    + size_t len;
    +
    + hdr_org = hdr = work->request_buf;
    + if (work->next_smb2_rcv_hdr_off)
    + hdr = REQUEST_BUF_NEXT(work);
    +
    + if (!hdr->NextCommand && !work->next_smb2_rcv_hdr_off)
    + len = be32_to_cpu(hdr_org->smb2_buf_length);
    + else if (hdr->NextCommand)
    + len = le32_to_cpu(hdr->NextCommand);
    + else
    + len = be32_to_cpu(hdr_org->smb2_buf_length) -
    + work->next_smb2_rcv_hdr_off;
    +
    + if (le16_to_cpu(hdr->Command) == SMB2_SESSION_SETUP_HE) {
    + signing_key = work->sess->smb3signingkey;
    + conn = work->sess->conn;
    + } else {
    + chann = lookup_chann_list(work->sess);
    + if (!chann)
    + return 0;
    + signing_key = chann->smb3signingkey;
    + conn = chann->conn;
    + }
    +
    + if (!signing_key) {
    + ksmbd_err("SMB3 signing key is not generated\n");
    + return 0;
    + }
    +
    + memcpy(signature_req, hdr->Signature, SMB2_SIGNATURE_SIZE);
    + memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
    + iov[0].iov_base = (char *)&hdr->ProtocolId;
    + iov[0].iov_len = len;
    +
    + if (ksmbd_sign_smb3_pdu(conn, signing_key, iov, 1, signature))
    + return 0;
    +
    + if (memcmp(signature, signature_req, SMB2_SIGNATURE_SIZE)) {
    + ksmbd_err("bad smb2 signature\n");
    + return 0;
    + }
    +
    + return 1;
    +}
    +
    +/**
    + * smb3_set_sign_rsp() - handler for rsp packet sign processing
    + * @work: smb work containing notify command buffer
    + *
    + */
    +void smb3_set_sign_rsp(struct ksmbd_work *work)
    +{
    + struct ksmbd_conn *conn;
    + struct smb2_hdr *req_hdr;
    + struct smb2_hdr *hdr, *hdr_org;
    + struct channel *chann;
    + char signature[SMB2_CMACAES_SIZE];
    + struct kvec iov[2];
    + int n_vec = 1;
    + size_t len;
    + char *signing_key;
    +
    + hdr_org = hdr = work->response_buf;
    + if (work->next_smb2_rsp_hdr_off)
    + hdr = RESPONSE_BUF_NEXT(work);
    +
    + req_hdr = REQUEST_BUF_NEXT(work);
    +
    + if (!work->next_smb2_rsp_hdr_off) {
    + len = get_rfc1002_len(hdr_org);
    + if (req_hdr->NextCommand)
    + len = ALIGN(len, 8);
    + } else {
    + len = get_rfc1002_len(hdr_org) - work->next_smb2_rsp_hdr_off;
    + len = ALIGN(len, 8);
    + }
    +
    + if (le16_to_cpu(hdr->Command) == SMB2_SESSION_SETUP_HE) {
    + signing_key = work->sess->smb3signingkey;
    + conn = work->sess->conn;
    + } else {
    + chann = lookup_chann_list(work->sess);
    + if (!chann)
    + return;
    + signing_key = chann->smb3signingkey;
    + conn = chann->conn;
    + }
    +
    + if (!signing_key)
    + return;
    +
    + if (req_hdr->NextCommand)
    + hdr->NextCommand = cpu_to_le32(len);
    +
    + hdr->Flags |= SMB2_FLAGS_SIGNED;
    + memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
    + iov[0].iov_base = (char *)&hdr->ProtocolId;
    + iov[0].iov_len = len;
    + if (work->aux_payload_sz) {
    + iov[0].iov_len -= work->aux_payload_sz;
    + iov[1].iov_base = work->aux_payload_buf;
    + iov[1].iov_len = work->aux_payload_sz;
    + n_vec++;
    + }
    +
    + if (!ksmbd_sign_smb3_pdu(conn, signing_key, iov, n_vec, signature))
    + memcpy(hdr->Signature, signature, SMB2_SIGNATURE_SIZE);
    +}
    +
    +/**
    + * smb3_preauth_hash_rsp() - handler for computing preauth hash on response
    + * @work: smb work containing response buffer
    + *
    + */
    +void smb3_preauth_hash_rsp(struct ksmbd_work *work)
    +{
    + struct ksmbd_conn *conn = work->conn;
    + struct ksmbd_session *sess = work->sess;
    + struct smb2_hdr *req, *rsp;
    +
    + if (conn->dialect != SMB311_PROT_ID)
    + return;
    +
    + WORK_BUFFERS(work, req, rsp);
    +
    + if (le16_to_cpu(req->Command) == SMB2_NEGOTIATE_HE)
    + ksmbd_gen_preauth_integrity_hash(conn, (char *)rsp,
    + conn->preauth_info->Preauth_HashValue);
    +
    + if (le16_to_cpu(rsp->Command) == SMB2_SESSION_SETUP_HE &&
    + sess && sess->state == SMB2_SESSION_IN_PROGRESS) {
    + __u8 *hash_value;
    +
    + hash_value = sess->Preauth_HashValue;
    + ksmbd_gen_preauth_integrity_hash(conn, (char *)rsp,
    + hash_value);
    + }
    +}
    +
    +static void fill_transform_hdr(struct smb2_transform_hdr *tr_hdr, char *old_buf,
    + __le16 cipher_type)
    +{
    + struct smb2_hdr *hdr = (struct smb2_hdr *)old_buf;
    + unsigned int orig_len = get_rfc1002_len(old_buf);
    +
    + memset(tr_hdr, 0, sizeof(struct smb2_transform_hdr));
    + tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM;
    + tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len);
    + tr_hdr->Flags = cpu_to_le16(0x01);
    + if (cipher_type == SMB2_ENCRYPTION_AES128_GCM ||
    + cipher_type == SMB2_ENCRYPTION_AES256_GCM)
    + get_random_bytes(&tr_hdr->Nonce, SMB3_AES_GCM_NONCE);
    + else
    + get_random_bytes(&tr_hdr->Nonce, SMB3_AES_CCM_NONCE);
    + memcpy(&tr_hdr->SessionId, &hdr->SessionId, 8);
    + inc_rfc1001_len(tr_hdr, sizeof(struct smb2_transform_hdr) - 4);
    + inc_rfc1001_len(tr_hdr, orig_len);
    +}
    +
    +int smb3_encrypt_resp(struct ksmbd_work *work)
    +{
    + char *buf = work->response_buf;
    + struct smb2_transform_hdr *tr_hdr;
    + struct kvec iov[3];
    + int rc = -ENOMEM;
    + int buf_size = 0, rq_nvec = 2 + (work->aux_payload_sz ? 1 : 0);
    +
    + if (ARRAY_SIZE(iov) < rq_nvec)
    + return -ENOMEM;
    +
    + tr_hdr = kzalloc(sizeof(struct smb2_transform_hdr), GFP_KERNEL);
    + if (!tr_hdr)
    + return rc;
    +
    + /* fill transform header */
    + fill_transform_hdr(tr_hdr, buf, work->conn->cipher_type);
    +
    + iov[0].iov_base = tr_hdr;
    + iov[0].iov_len = sizeof(struct smb2_transform_hdr);
    + buf_size += iov[0].iov_len - 4;
    +
    + iov[1].iov_base = buf + 4;
    + iov[1].iov_len = get_rfc1002_len(buf);
    + if (work->aux_payload_sz) {
    + iov[1].iov_len = work->resp_hdr_sz - 4;
    +
    + iov[2].iov_base = work->aux_payload_buf;
    + iov[2].iov_len = work->aux_payload_sz;
    + buf_size += iov[2].iov_len;
    + }
    + buf_size += iov[1].iov_len;
    + work->resp_hdr_sz = iov[1].iov_len;
    +
    + rc = ksmbd_crypt_message(work->conn, iov, rq_nvec, 1);
    + if (rc)
    + return rc;
    +
    + memmove(buf, iov[1].iov_base, iov[1].iov_len);
    + tr_hdr->smb2_buf_length = cpu_to_be32(buf_size);
    + work->tr_buf = tr_hdr;
    +
    + return rc;
    +}
    +
    +int smb3_is_transform_hdr(void *buf)
    +{
    + struct smb2_transform_hdr *trhdr = buf;
    +
    + return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM;
    +}
    +
    +int smb3_decrypt_req(struct ksmbd_work *work)
    +{
    + struct ksmbd_conn *conn = work->conn;
    + struct ksmbd_session *sess;
    + char *buf = work->request_buf;
    + struct smb2_hdr *hdr;
    + unsigned int pdu_length = get_rfc1002_len(buf);
    + struct kvec iov[2];
    + unsigned int buf_data_size = pdu_length + 4 -
    + sizeof(struct smb2_transform_hdr);
    + struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
    + unsigned int orig_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
    + int rc = 0;
    +
    + sess = ksmbd_session_lookup(conn, le64_to_cpu(tr_hdr->SessionId));
    + if (!sess) {
    + ksmbd_err("invalid session id(%llx) in transform header\n",
    + le64_to_cpu(tr_hdr->SessionId));
    + return -ECONNABORTED;
    + }
    +
    + if (pdu_length + 4 <
    + sizeof(struct smb2_transform_hdr) + sizeof(struct smb2_hdr)) {
    + ksmbd_err("Transform message is too small (%u)\n",
    + pdu_length);
    + return -ECONNABORTED;
    + }
    +
    + if (pdu_length + 4 < orig_len + sizeof(struct smb2_transform_hdr)) {
    + ksmbd_err("Transform message is broken\n");
    + return -ECONNABORTED;
    + }
    +
    + iov[0].iov_base = buf;
    + iov[0].iov_len = sizeof(struct smb2_transform_hdr);
    + iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr);
    + iov[1].iov_len = buf_data_size;
    + rc = ksmbd_crypt_message(conn, iov, 2, 0);
    + if (rc)
    + return rc;
    +
    + memmove(buf + 4, iov[1].iov_base, buf_data_size);
    + hdr = (struct smb2_hdr *)buf;
    + hdr->smb2_buf_length = cpu_to_be32(buf_data_size);
    +
    + return rc;
    +}
    +
    +bool smb3_11_final_sess_setup_resp(struct ksmbd_work *work)
    +{
    + struct ksmbd_conn *conn = work->conn;
    + struct smb2_hdr *rsp = work->response_buf;
    +
    + if (conn->dialect < SMB30_PROT_ID)
    + return false;
    +
    + if (work->next_smb2_rcv_hdr_off)
    + rsp = RESPONSE_BUF_NEXT(work);
    +
    + if (le16_to_cpu(rsp->Command) == SMB2_SESSION_SETUP_HE &&
    + rsp->Status == STATUS_SUCCESS)
    + return true;
    + return false;
    +}
    diff --git a/fs/cifsd/smb2pdu.h b/fs/cifsd/smb2pdu.h
    new file mode 100644
    index 000000000000..b3d3365d7070
    --- /dev/null
    +++ b/fs/cifsd/smb2pdu.h
    @@ -0,0 +1,1664 @@
    +/* SPDX-License-Identifier: GPL-2.0-or-later */
    +/*
    + * Copyright (C) 2016 Namjae Jeon <linkinjeon@kernel.org>
    + * Copyright (C) 2018 Samsung Electronics Co., Ltd.
    + */
    +
    +#ifndef _SMB2PDU_H
    +#define _SMB2PDU_H
    +
    +#include "ntlmssp.h"
    +#include "smbacl.h"
    +
    +/*
    + * Note that, due to trying to use names similar to the protocol specifications,
    + * there are many mixed case field names in the structures below. Although
    + * this does not match typical Linux kernel style, it is necessary to be
    + * able to match against the protocol specfication.
    + *
    + * SMB2 commands
    + * Some commands have minimal (wct=0,bcc=0), or uninteresting, responses
    + * (ie no useful data other than the SMB error code itself) and are marked such.
    + * Knowing this helps avoid response buffer allocations and copy in some cases.
    + */
    +
    +/* List of commands in host endian */
    +#define SMB2_NEGOTIATE_HE 0x0000
    +#define SMB2_SESSION_SETUP_HE 0x0001
    +#define SMB2_LOGOFF_HE 0x0002 /* trivial request/resp */
    +#define SMB2_TREE_CONNECT_HE 0x0003
    +#define SMB2_TREE_DISCONNECT_HE 0x0004 /* trivial req/resp */
    +#define SMB2_CREATE_HE 0x0005
    +#define SMB2_CLOSE_HE 0x0006
    +#define SMB2_FLUSH_HE 0x0007 /* trivial resp */
    +#define SMB2_READ_HE 0x0008
    +#define SMB2_WRITE_HE 0x0009
    +#define SMB2_LOCK_HE 0x000A
    +#define SMB2_IOCTL_HE 0x000B
    +#define SMB2_CANCEL_HE 0x000C
    +#define SMB2_ECHO_HE 0x000D
    +#define SMB2_QUERY_DIRECTORY_HE 0x000E
    +#define SMB2_CHANGE_NOTIFY_HE 0x000F
    +#define SMB2_QUERY_INFO_HE 0x0010
    +#define SMB2_SET_INFO_HE 0x0011
    +#define SMB2_OPLOCK_BREAK_HE 0x0012
    +
    +/* The same list in little endian */
    +#define SMB2_NEGOTIATE cpu_to_le16(SMB2_NEGOTIATE_HE)
    +#define SMB2_SESSION_SETUP cpu_to_le16(SMB2_SESSION_SETUP_HE)
    +#define SMB2_LOGOFF cpu_to_le16(SMB2_LOGOFF_HE)
    +#define SMB2_TREE_CONNECT cpu_to_le16(SMB2_TREE_CONNECT_HE)
    +#define SMB2_TREE_DISCONNECT cpu_to_le16(SMB2_TREE_DISCONNECT_HE)
    +#define SMB2_CREATE cpu_to_le16(SMB2_CREATE_HE)
    +#define SMB2_CLOSE cpu_to_le16(SMB2_CLOSE_HE)
    +#define SMB2_FLUSH cpu_to_le16(SMB2_FLUSH_HE)
    +#define SMB2_READ cpu_to_le16(SMB2_READ_HE)
    +#define SMB2_WRITE cpu_to_le16(SMB2_WRITE_HE)
    +#define SMB2_LOCK cpu_to_le16(SMB2_LOCK_HE)
    +#define SMB2_IOCTL cpu_to_le16(SMB2_IOCTL_HE)
    +#define SMB2_CANCEL cpu_to_le16(SMB2_CANCEL_HE)
    +#define SMB2_ECHO cpu_to_le16(SMB2_ECHO_HE)
    +#define SMB2_QUERY_DIRECTORY cpu_to_le16(SMB2_QUERY_DIRECTORY_HE)
    +#define SMB2_CHANGE_NOTIFY cpu_to_le16(SMB2_CHANGE_NOTIFY_HE)
    +#define SMB2_QUERY_INFO cpu_to_le16(SMB2_QUERY_INFO_HE)
    +#define SMB2_SET_INFO cpu_to_le16(SMB2_SET_INFO_HE)
    +#define SMB2_OPLOCK_BREAK cpu_to_le16(SMB2_OPLOCK_BREAK_HE)
    +
    +/*Create Action Flags*/
    +#define FILE_SUPERSEDED 0x00000000
    +#define FILE_OPENED 0x00000001
    +#define FILE_CREATED 0x00000002
    +#define FILE_OVERWRITTEN 0x00000003
    +
    +/*
    + * Size of the session key (crypto key encrypted with the password
    + */
    +#define SMB2_NTLMV2_SESSKEY_SIZE 16
    +#define SMB2_SIGNATURE_SIZE 16
    +#define SMB2_HMACSHA256_SIZE 32
    +#define SMB2_CMACAES_SIZE 16
    +#define SMB3_GCM128_CRYPTKEY_SIZE 16
    +#define SMB3_GCM256_CRYPTKEY_SIZE 32
    +
    +/*
    + * Size of the smb3 encryption/decryption keys
    + */
    +#define SMB3_ENC_DEC_KEY_SIZE 32
    +
    +/*
    + * Size of the smb3 signing key
    + */
    +#define SMB3_SIGN_KEY_SIZE 16
    +
    +#define CIFS_CLIENT_CHALLENGE_SIZE 8
    +#define SMB_SERVER_CHALLENGE_SIZE 8
    +
    +/* SMB2 Max Credits */
    +#define SMB2_MAX_CREDITS 8192
    +
    +#define SMB2_CLIENT_GUID_SIZE 16
    +#define SMB2_CREATE_GUID_SIZE 16
    +
    +/* Maximum buffer size value we can send with 1 credit */
    +#define SMB2_MAX_BUFFER_SIZE 65536
    +
    +#define NUMBER_OF_SMB2_COMMANDS 0x0013
    +
    +/* BB FIXME - analyze following length BB */
    +#define MAX_SMB2_HDR_SIZE 0x78 /* 4 len + 64 hdr + (2*24 wct) + 2 bct + 2 pad */
    +
    +#define SMB2_PROTO_NUMBER cpu_to_le32(0x424d53fe) /* 'B''M''S' */
    +#define SMB2_TRANSFORM_PROTO_NUM cpu_to_le32(0x424d53fd)
    +
    +#define SMB21_DEFAULT_IOSIZE (1024 * 1024)
    +#define SMB3_DEFAULT_IOSIZE (4 * 1024 * 1024)
    +#define SMB3_DEFAULT_TRANS_SIZE (1024 * 1024)
    +
    +/*
    + * SMB2 Header Definition
    + *
    + * "MBZ" : Must be Zero
    + * "BB" : BugBug, Something to check/review/analyze later
    + * "PDU" : "Protocol Data Unit" (ie a network "frame")
    + *
    + */
    +
    +#define __SMB2_HEADER_STRUCTURE_SIZE 64
    +#define SMB2_HEADER_STRUCTURE_SIZE \
    + cpu_to_le16(__SMB2_HEADER_STRUCTURE_SIZE)
    +
    +struct smb2_hdr {
    + __be32 smb2_buf_length; /* big endian on wire */
    + /*
    + * length is only two or three bytes - with
    + * one or two byte type preceding it that MBZ
    + */
    + __le32 ProtocolId; /* 0xFE 'S' 'M' 'B' */
    + __le16 StructureSize; /* 64 */
    + __le16 CreditCharge; /* MBZ */
    + __le32 Status; /* Error from server */
    + __le16 Command;
    + __le16 CreditRequest; /* CreditResponse */
    + __le32 Flags;
    + __le32 NextCommand;
    + __le64 MessageId;
    + union {
    + struct {
    + __le32 ProcessId;
    + __le32 TreeId;
    + } __packed SyncId;
    + __le64 AsyncId;
    + } __packed Id;
    + __le64 SessionId;
    + __u8 Signature[16];
    +} __packed;
    +
    +struct smb2_pdu {
    + struct smb2_hdr hdr;
    + __le16 StructureSize2; /* size of wct area (varies, request specific) */
    +} __packed;
    +
    +#define SMB3_AES_CCM_NONCE 11
    +#define SMB3_AES_GCM_NONCE 12
    +
    +struct smb2_transform_hdr {
    + __be32 smb2_buf_length; /* big endian on wire */
    + /*
    + * length is only two or three bytes - with
    + * one or two byte type preceding it that MBZ
    + */
    + __le32 ProtocolId; /* 0xFD 'S' 'M' 'B' */
    + __u8 Signature[16];
    + __u8 Nonce[16];
    + __le32 OriginalMessageSize;
    + __u16 Reserved1;
    + __le16 Flags; /* EncryptionAlgorithm */
    + __le64 SessionId;
    +} __packed;
    +
    +/*
    + * SMB2 flag definitions
    + */
    +#define SMB2_FLAGS_SERVER_TO_REDIR cpu_to_le32(0x00000001)
    +#define SMB2_FLAGS_ASYNC_COMMAND cpu_to_le32(0x00000002)
    +#define SMB2_FLAGS_RELATED_OPERATIONS cpu_to_le32(0x00000004)
    +#define SMB2_FLAGS_SIGNED cpu_to_le32(0x00000008)
    +#define SMB2_FLAGS_DFS_OPERATIONS cpu_to_le32(0x10000000)
    +#define SMB2_FLAGS_REPLAY_OPERATIONS cpu_to_le32(0x20000000)
    +
    +/*
    + * Definitions for SMB2 Protocol Data Units (network frames)
    + *
    + * See MS-SMB2.PDF specification for protocol details.
    + * The Naming convention is the lower case version of the SMB2
    + * command code name for the struct. Note that structures must be packed.
    + *
    + */
    +
    +#define SMB2_ERROR_STRUCTURE_SIZE2 9
    +#define SMB2_ERROR_STRUCTURE_SIZE2_LE cpu_to_le16(SMB2_ERROR_STRUCTURE_SIZE2)
    +
    +struct smb2_err_rsp {
    + struct smb2_hdr hdr;
    + __le16 StructureSize;
    + __u8 ErrorContextCount;
    + __u8 Reserved;
    + __le32 ByteCount; /* even if zero, at least one byte follows */
    + __u8 ErrorData[1]; /* variable length */
    +} __packed;
    +
    +struct smb2_negotiate_req {
    + struct smb2_hdr hdr;
    + __le16 StructureSize; /* Must be 36 */
    + __le16 DialectCount;
    + __le16 SecurityMode;
    + __le16 Reserved; /* MBZ */
    + __le32 Capabilities;
    + __u8 ClientGUID[SMB2_CLIENT_GUID_SIZE];
    + /* In SMB3.02 and earlier next three were MBZ le64 ClientStartTime */
    + __le32 NegotiateContextOffset; /* SMB3.1.1 only. MBZ earlier */
    + __le16 NegotiateContextCount; /* SMB3.1.1 only. MBZ earlier */
    + __le16 Reserved2;
    + __le16 Dialects[1]; /* One dialect (vers=) at a time for now */
    +} __packed;
    +
    +/* SecurityMode flags */
    +#define SMB2_NEGOTIATE_SIGNING_ENABLED_LE cpu_to_le16(0x0001)
    +#define SMB2_NEGOTIATE_SIGNING_REQUIRED 0x0002
    +#define SMB2_NEGOTIATE_SIGNING_REQUIRED_LE cpu_to_le16(0x0002)
    +/* Capabilities flags */
    +#define SMB2_GLOBAL_CAP_DFS 0x00000001
    +#define SMB2_GLOBAL_CAP_LEASING 0x00000002 /* Resp only New to SMB2.1 */
    +#define SMB2_GLOBAL_CAP_LARGE_MTU 0X00000004 /* Resp only New to SMB2.1 */
    +#define SMB2_GLOBAL_CAP_MULTI_CHANNEL 0x00000008 /* New to SMB3 */
    +#define SMB2_GLOBAL_CAP_PERSISTENT_HANDLES 0x00000010 /* New to SMB3 */
    +#define SMB2_GLOBAL_CAP_DIRECTORY_LEASING 0x00000020 /* New to SMB3 */
    +#define SMB2_GLOBAL_CAP_ENCRYPTION 0x00000040 /* New to SMB3 */
    +/* Internal types */
    +#define SMB2_NT_FIND 0x00100000
    +#define SMB2_LARGE_FILES 0x00200000
    +
    +#define SMB311_SALT_SIZE 32
    +/* Hash Algorithm Types */
    +#define SMB2_PREAUTH_INTEGRITY_SHA512 cpu_to_le16(0x0001)
    +
    +#define PREAUTH_HASHVALUE_SIZE 64
    +
    +struct preauth_integrity_info {
    + /* PreAuth integrity Hash ID */
    + __le16 Preauth_HashId;
    + /* PreAuth integrity Hash Value */
    + __u8 Preauth_HashValue[PREAUTH_HASHVALUE_SIZE];
    +};
    +
    +/* offset is sizeof smb2_negotiate_rsp - 4 but rounded up to 8 bytes. */
    +#ifdef CONFIG_SMB_SERVER_KERBEROS5
    +/* sizeof(struct smb2_negotiate_rsp) - 4 =
    + * header(64) + response(64) + GSS_LENGTH(96) + GSS_PADDING(0)
    + */
    +#define OFFSET_OF_NEG_CONTEXT 0xe0
    +#else
    +/* sizeof(struct smb2_negotiate_rsp) - 4 =
    + * header(64) + response(64) + GSS_LENGTH(74) + GSS_PADDING(6)
    + */
    +#define OFFSET_OF_NEG_CONTEXT 0xd0
    +#endif
    +
    +#define SMB2_PREAUTH_INTEGRITY_CAPABILITIES cpu_to_le16(1)
    +#define SMB2_ENCRYPTION_CAPABILITIES cpu_to_le16(2)
    +#define SMB2_COMPRESSION_CAPABILITIES cpu_to_le16(3)
    +#define SMB2_NETNAME_NEGOTIATE_CONTEXT_ID cpu_to_le16(5)
    +#define SMB2_POSIX_EXTENSIONS_AVAILABLE cpu_to_le16(0x100)
    +
    +struct smb2_neg_context {
    + __le16 ContextType;
    + __le16 DataLength;
    + __le32 Reserved;
    + /* Followed by array of data */
    +} __packed;
    +
    +struct smb2_preauth_neg_context {
    + __le16 ContextType; /* 1 */
    + __le16 DataLength;
    + __le32 Reserved;
    + __le16 HashAlgorithmCount; /* 1 */
    + __le16 SaltLength;
    + __le16 HashAlgorithms; /* HashAlgorithms[0] since only one defined */
    + __u8 Salt[SMB311_SALT_SIZE];
    +} __packed;
    +
    +/* Encryption Algorithms Ciphers */
    +#define SMB2_ENCRYPTION_AES128_CCM cpu_to_le16(0x0001)
    +#define SMB2_ENCRYPTION_AES128_GCM cpu_to_le16(0x0002)
    +#define SMB2_ENCRYPTION_AES256_CCM cpu_to_le16(0x0003)
    +#define SMB2_ENCRYPTION_AES256_GCM cpu_to_le16(0x0004)
    +
    +struct smb2_encryption_neg_context {
    + __le16 ContextType; /* 2 */
    + __le16 DataLength;
    + __le32 Reserved;
    + /* CipherCount usally 2, but can be 3 when AES256-GCM enabled */
    + __le16 CipherCount; /* AES-128-GCM and AES-128-CCM by default */
    + __le16 Ciphers[1];
    +} __packed;
    +
    +#define SMB3_COMPRESS_NONE cpu_to_le16(0x0000)
    +#define SMB3_COMPRESS_LZNT1 cpu_to_le16(0x0001)
    +#define SMB3_COMPRESS_LZ77 cpu_to_le16(0x0002)
    +#define SMB3_COMPRESS_LZ77_HUFF cpu_to_le16(0x0003)
    +
    +struct smb2_compression_ctx {
    + __le16 ContextType; /* 3 */
    + __le16 DataLength;
    + __le32 Reserved;
    + __le16 CompressionAlgorithmCount;
    + __u16 Padding;
    + __le32 Reserved1;
    + __le16 CompressionAlgorithms[1];
    +} __packed;
    +
    +#define POSIX_CTXT_DATA_LEN 16
    +struct smb2_posix_neg_context {
    + __le16 ContextType; /* 0x100 */
    + __le16 DataLength;
    + __le32 Reserved;
    + __u8 Name[16]; /* POSIX ctxt GUID 93AD25509CB411E7B42383DE968BCD7C */
    +} __packed;
    +
    +struct smb2_netname_neg_context {
    + __le16 ContextType; /* 0x100 */
    + __le16 DataLength;
    + __le32 Reserved;
    + __le16 NetName[0]; /* hostname of target converted to UCS-2 */
    +} __packed;
    +
    +struct smb2_negotiate_rsp {
    + struct smb2_hdr hdr;
    + __le16 StructureSize; /* Must be 65 */
    + __le16 SecurityMode;
    + __le16 DialectRevision;
    + __le16 NegotiateContextCount; /* Prior to SMB3.1.1 was Reserved & MBZ */
    + __u8 ServerGUID[16];
    + __le32 Capabilities;
    + __le32 MaxTransactSize;
    + __le32 MaxReadSize;
    + __le32 MaxWriteSize;
    + __le64 SystemTime; /* MBZ */
    + __le64 ServerStartTime;
    + __le16 SecurityBufferOffset;
    + __le16 SecurityBufferLength;
    + __le32 NegotiateContextOffset; /* Pre:SMB3.1.1 was reserved/ignored */
    + __u8 Buffer[1]; /* variable length GSS security buffer */
    +} __packed;
    +
    +/* Flags */
    +#define SMB2_SESSION_REQ_FLAG_BINDING 0x01
    +#define SMB2_SESSION_REQ_FLAG_ENCRYPT_DATA 0x04
    +
    +#define SMB2_SESSION_EXPIRED (0)
    +#define SMB2_SESSION_IN_PROGRESS BIT(0)
    +#define SMB2_SESSION_VALID BIT(1)
    +
    +/* Flags */
    +#define SMB2_SESSION_REQ_FLAG_BINDING 0x01
    +#define SMB2_SESSION_REQ_FLAG_ENCRYPT_DATA 0x04
    +
    +struct smb2_sess_setup_req {
    + struct smb2_hdr hdr;
    + __le16 StructureSize; /* Must be 25 */
    + __u8 Flags;
    + __u8 SecurityMode;
    + __le32 Capabilities;
    + __le32 Channel;
    + __le16 SecurityBufferOffset;
    + __le16 SecurityBufferLength;
    + __le64 PreviousSessionId;
    + __u8 Buffer[1]; /* variable length GSS security buffer */
    +} __packed;
    +
    +/* Flags/Reserved for SMB3.1.1 */
    +#define SMB2_SHAREFLAG_CLUSTER_RECONNECT 0x0001
    +
    +/* Currently defined SessionFlags */
    +#define SMB2_SESSION_FLAG_IS_GUEST_LE cpu_to_le16(0x0001)
    +#define SMB2_SESSION_FLAG_IS_NULL_LE cpu_to_le16(0x0002)
    +#define SMB2_SESSION_FLAG_ENCRYPT_DATA_LE cpu_to_le16(0x0004)
    +struct smb2_sess_setup_rsp {
    + struct smb2_hdr hdr;
    + __le16 StructureSize; /* Must be 9 */
    + __le16 SessionFlags;
    + __le16 SecurityBufferOffset;
    + __le16 SecurityBufferLength;
    + __u8 Buffer[1]; /* variable length GSS security buffer */
    +} __packed;
    +
    +struct smb2_logoff_req {
    + struct smb2_hdr hdr;
    + __le16 StructureSize; /* Must be 4 */
    + __le16 Reserved;
    +} __packed;
    +
    +struct smb2_logoff_rsp {
    + struct smb2_hdr hdr;
    + __le16 StructureSize; /* Must be 4 */
    + __le16 Reserved;
    +} __packed;
    +
    +struct smb2_tree_connect_req {
    + struct smb2_hdr hdr;
    + __le16 StructureSize; /* Must be 9 */
    + __le16 Reserved; /* Flags in SMB3.1.1 */
    + __le16 PathOffset;
    + __le16 PathLength;
    + __u8 Buffer[1]; /* variable length */
    +} __packed;
    +
    +struct smb2_tree_connect_rsp {
    + struct smb2_hdr hdr;
    + __le16 StructureSize; /* Must be 16 */
    + __u8 ShareType; /* see below */
    + __u8 Reserved;
    + __le32 ShareFlags; /* see below */
    + __le32 Capabilities; /* see below */
    + __le32 MaximalAccess;
    +} __packed;
    +
    +/* Possible ShareType values */
    +#define SMB2_SHARE_TYPE_DISK 0x01
    +#define SMB2_SHARE_TYPE_PIPE 0x02
    +#define SMB2_SHARE_TYPE_PRINT 0x03
    +
    +/*
    + * Possible ShareFlags - exactly one and only one of the first 4 caching flags
    + * must be set (any of the remaining, SHI1005, flags may be set individually
    + * or in combination.
    + */
    +#define SMB2_SHAREFLAG_MANUAL_CACHING 0x00000000
    +#define SMB2_SHAREFLAG_AUTO_CACHING 0x00000010
    +#define SMB2_SHAREFLAG_VDO_CACHING 0x00000020
    +#define SMB2_SHAREFLAG_NO_CACHING 0x00000030
    +#define SHI1005_FLAGS_DFS 0x00000001
    +#define SHI1005_FLAGS_DFS_ROOT 0x00000002
    +#define SHI1005_FLAGS_RESTRICT_EXCLUSIVE_OPENS 0x00000100
    +#define SHI1005_FLAGS_FORCE_SHARED_DELETE 0x00000200
    +#define SHI1005_FLAGS_ALLOW_NAMESPACE_CACHING 0x00000400
    +#define SHI1005_FLAGS_ACCESS_BASED_DIRECTORY_ENUM 0x00000800
    +#define SHI1005_FLAGS_FORCE_LEVELII_OPLOCK 0x00001000
    +#define SHI1005_FLAGS_ENABLE_HASH 0x00002000
    +
    +/* Possible share capabilities */
    +#define SMB2_SHARE_CAP_DFS cpu_to_le32(0x00000008)
    +
    +struct smb2_tree_disconnect_req {
    + struct smb2_hdr hdr;
    + __le16 StructureSize; /* Must be 4 */
    + __le16 Reserved;
    +} __packed;
    +
    +struct smb2_tree_disconnect_rsp {
    + struct smb2_hdr hdr;
    + __le16 StructureSize; /* Must be 4 */
    + __le16 Reserved;
    +} __packed;
    +
    +#define ATTR_READONLY_LE cpu_to_le32(ATTR_READONLY)
    +#define ATTR_HIDDEN_LE cpu_to_le32(ATTR_HIDDEN)
    +#define ATTR_SYSTEM_LE cpu_to_le32(ATTR_SYSTEM)
    +#define ATTR_DIRECTORY_LE cpu_to_le32(ATTR_DIRECTORY)
    +#define ATTR_ARCHIVE_LE cpu_to_le32(ATTR_ARCHIVE)
    +#define ATTR_NORMAL_LE cpu_to_le32(ATTR_NORMAL)
    +#define ATTR_TEMPORARY_LE cpu_to_le32(ATTR_TEMPORARY)
    +#define ATTR_SPARSE_FILE_LE cpu_to_le32(ATTR_SPARSE)
    +#define ATTR_REPARSE_POINT_LE cpu_to_le32(ATTR_REPARSE)
    +#define ATTR_COMPRESSED_LE cpu_to_le32(ATTR_COMPRESSED)
    +#define ATTR_OFFLINE_LE cpu_to_le32(ATTR_OFFLINE)
    +#define ATTR_NOT_CONTENT_INDEXED_LE cpu_to_le32(ATTR_NOT_CONTENT_INDEXED)
    +#define ATTR_ENCRYPTED_LE cpu_to_le32(ATTR_ENCRYPTED)
    +#define ATTR_INTEGRITY_STREAML_LE cpu_to_le32(0x00008000)
    +#define ATTR_NO_SCRUB_DATA_LE cpu_to_le32(0x00020000)
    +#define ATTR_MASK_LE cpu_to_le32(0x00007FB7)
    +
    +/* Oplock levels */
    +#define SMB2_OPLOCK_LEVEL_NONE 0x00
    +#define SMB2_OPLOCK_LEVEL_II 0x01
    +#define SMB2_OPLOCK_LEVEL_EXCLUSIVE 0x08
    +#define SMB2_OPLOCK_LEVEL_BATCH 0x09
    +#define SMB2_OPLOCK_LEVEL_LEASE 0xFF
    +/* Non-spec internal type */
    +#define SMB2_OPLOCK_LEVEL_NOCHANGE 0x99
    +
    +/* Desired Access Flags */
    +#define FILE_READ_DATA_LE cpu_to_le32(0x00000001)
    +#define FILE_LIST_DIRECTORY_LE cpu_to_le32(0x00000001)
    +#define FILE_WRITE_DATA_LE cpu_to_le32(0x00000002)
    +#define FILE_ADD_FILE_LE cpu_to_le32(0x00000002)
    +#define FILE_APPEND_DATA_LE cpu_to_le32(0x00000004)
    +#define FILE_ADD_SUBDIRECTORY_LE cpu_to_le32(0x00000004)
    +#define FILE_READ_EA_LE cpu_to_le32(0x00000008)
    +#define FILE_WRITE_EA_LE cpu_to_le32(0x00000010)
    +#define FILE_EXECUTE_LE cpu_to_le32(0x00000020)
    +#define FILE_TRAVERSE_LE cpu_to_le32(0x00000020)
    +#define FILE_DELETE_CHILD_LE cpu_to_le32(0x00000040)
    +#define FILE_READ_ATTRIBUTES_LE cpu_to_le32(0x00000080)
    +#define FILE_WRITE_ATTRIBUTES_LE cpu_to_le32(0x00000100)
    +#define FILE_DELETE_LE cpu_to_le32(0x00010000)
    +#define FILE_READ_CONTROL_LE cpu_to_le32(0x00020000)
    +#define FILE_WRITE_DAC_LE cpu_to_le32(0x00040000)
    +#define FILE_WRITE_OWNER_LE cpu_to_le32(0x00080000)
    +#define FILE_SYNCHRONIZE_LE cpu_to_le32(0x00100000)
    +#define FILE_ACCESS_SYSTEM_SECURITY_LE cpu_to_le32(0x01000000)
    +#define FILE_MAXIMAL_ACCESS_LE cpu_to_le32(0x02000000)
    +#define FILE_GENERIC_ALL_LE cpu_to_le32(0x10000000)
    +#define FILE_GENERIC_EXECUTE_LE cpu_to_le32(0x20000000)
    +#define FILE_GENERIC_WRITE_LE cpu_to_le32(0x40000000)
    +#define FILE_GENERIC_READ_LE cpu_to_le32(0x80000000)
    +#define DESIRED_ACCESS_MASK cpu_to_le32(0xF21F01FF)
    +
    +/* ShareAccess Flags */
    +#define FILE_SHARE_READ_LE cpu_to_le32(0x00000001)
    +#define FILE_SHARE_WRITE_LE cpu_to_le32(0x00000002)
    +#define FILE_SHARE_DELETE_LE cpu_to_le32(0x00000004)
    +#define FILE_SHARE_ALL_LE cpu_to_le32(0x00000007)
    +
    +/* CreateDisposition Flags */
    +#define FILE_SUPERSEDE_LE cpu_to_le32(0x00000000)
    +#define FILE_OPEN_LE cpu_to_le32(0x00000001)
    +#define FILE_CREATE_LE cpu_to_le32(0x00000002)
    +#define FILE_OPEN_IF_LE cpu_to_le32(0x00000003)
    +#define FILE_OVERWRITE_LE cpu_to_le32(0x00000004)
    +#define FILE_OVERWRITE_IF_LE cpu_to_le32(0x00000005)
    +#define FILE_CREATE_MASK_LE cpu_to_le32(0x00000007)
    +
    +#define FILE_READ_DESIRED_ACCESS_LE (FILE_READ_DATA_LE | \
    + FILE_READ_EA_LE | \
    + FILE_GENERIC_READ_LE)
    +#define FILE_WRITE_DESIRE_ACCESS_LE (FILE_WRITE_DATA_LE | \
    + FILE_APPEND_DATA_LE | \
    + FILE_WRITE_EA_LE | \
    + FILE_WRITE_ATTRIBUTES_LE | \
    + FILE_GENERIC_WRITE_LE)
    +
    +/* Impersonation Levels */
    +#define IL_ANONYMOUS_LE cpu_to_le32(0x00000000)
    +#define IL_IDENTIFICATION_LE cpu_to_le32(0x00000001)
    +#define IL_IMPERSONATION_LE cpu_to_le32(0x00000002)
    +#define IL_DELEGATE_LE cpu_to_le32(0x00000003)
    +
    +/* Create Context Values */
    +#define SMB2_CREATE_EA_BUFFER "ExtA" /* extended attributes */
    +#define SMB2_CREATE_SD_BUFFER "SecD" /* security descriptor */
    +#define SMB2_CREATE_DURABLE_HANDLE_REQUEST "DHnQ"
    +#define SMB2_CREATE_DURABLE_HANDLE_RECONNECT "DHnC"
    +#define SMB2_CREATE_ALLOCATION_SIZE "AlSi"
    +#define SMB2_CREATE_QUERY_MAXIMAL_ACCESS_REQUEST "MxAc"
    +#define SMB2_CREATE_TIMEWARP_REQUEST "TWrp"
    +#define SMB2_CREATE_QUERY_ON_DISK_ID "QFid"
    +#define SMB2_CREATE_REQUEST_LEASE "RqLs"
    +#define SMB2_CREATE_DURABLE_HANDLE_REQUEST_V2 "DH2Q"
    +#define SMB2_CREATE_DURABLE_HANDLE_RECONNECT_V2 "DH2C"
    +#define SMB2_CREATE_APP_INSTANCE_ID "\x45\xBC\xA6\x6A\xEF\xA7\xF7\x4A\x90\x08\xFA\x46\x2E\x14\x4D\x74"
    + #define SMB2_CREATE_APP_INSTANCE_VERSION "\xB9\x82\xD0\xB7\x3B\x56\x07\x4F\xA0\x7B\x52\x4A\x81\x16\xA0\x10"
    +#define SVHDX_OPEN_DEVICE_CONTEXT 0x83CE6F1AD851E0986E34401CC9BCFCE9
    +#define SMB2_CREATE_TAG_POSIX "\x93\xAD\x25\x50\x9C\xB4\x11\xE7\xB4\x23\x83\xDE\x96\x8B\xCD\x7C"
    +
    +struct smb2_create_req {
    + struct smb2_hdr hdr;
    + __le16 StructureSize; /* Must be 57 */
    + __u8 SecurityFlags;
    + __u8 RequestedOplockLevel;
    + __le32 ImpersonationLevel;
    + __le64 SmbCreateFlags;
    + __le64 Reserved;
    + __le32 DesiredAccess;
    + __le32 FileAttributes;
    + __le32 ShareAccess;
    + __le32 CreateDisposition;
    + __le32 CreateOptions;
    + __le16 NameOffset;
    + __le16 NameLength;
    + __le32 CreateContextsOffset;
    + __le32 CreateContextsLength;
    + __u8 Buffer[0];
    +} __packed;
    +
    +struct smb2_create_rsp {
    + struct smb2_hdr hdr;
    + __le16 StructureSize; /* Must be 89 */
    + __u8 OplockLevel;
    + __u8 Reserved;
    + __le32 CreateAction;
    + __le64 CreationTime;
    + __le64 LastAccessTime;
    + __le64 LastWriteTime;
    + __le64 ChangeTime;
    + __le64 AllocationSize;
    + __le64 EndofFile;
    + __le32 FileAttributes;
    + __le32 Reserved2;
    + __le64 PersistentFileId;
    + __le64 VolatileFileId;
    + __le32 CreateContextsOffset;
    + __le32 CreateContextsLength;
    + __u8 Buffer[1];
    +} __packed;
    +
    +struct create_context {
    + __le32 Next;
    + __le16 NameOffset;
    + __le16 NameLength;
    + __le16 Reserved;
    + __le16 DataOffset;
    + __le32 DataLength;
    + __u8 Buffer[0];
    +} __packed;
    +
    +struct create_durable_req_v2 {
    + struct create_context ccontext;
    + __u8 Name[8];
    + __le32 Timeout;
    + __le32 Flags;
    + __u8 Reserved[8];
    + __u8 CreateGuid[16];
    +} __packed;
    +
    +struct create_durable_reconn_req {
    + struct create_context ccontext;
    + __u8 Name[8];
    + union {
    + __u8 Reserved[16];
    + struct {
    + __le64 PersistentFileId;
    + __le64 VolatileFileId;
    + } Fid;
    + } Data;
    +} __packed;
    +
    +struct create_durable_reconn_v2_req {
    + struct create_context ccontext;
    + __u8 Name[8];
    + struct {
    + __le64 PersistentFileId;
    + __le64 VolatileFileId;
    + } Fid;
    + __u8 CreateGuid[16];
    + __le32 Flags;
    +} __packed;
    +
    +struct create_app_inst_id {
    + struct create_context ccontext;
    + __u8 Name[8];
    + __u8 Reserved[8];
    + __u8 AppInstanceId[16];
    +} __packed;
    +
    +struct create_app_inst_id_vers {
    + struct create_context ccontext;
    + __u8 Name[8];
    + __u8 Reserved[2];
    + __u8 Padding[4];
    + __le64 AppInstanceVersionHigh;
    + __le64 AppInstanceVersionLow;
    +} __packed;
    +
    +struct create_mxac_req {
    + struct create_context ccontext;
    + __u8 Name[8];
    + __le64 Timestamp;
    +} __packed;
    +
    +struct create_alloc_size_req {
    + struct create_context ccontext;
    + __u8 Name[8];
    + __le64 AllocationSize;
    +} __packed;
    +
    +struct create_posix {
    + struct create_context ccontext;
    + __u8 Name[16];
    + __le32 Mode;
    + __u32 Reserved;
    +} __packed;
    +
    +struct create_durable_rsp {
    + struct create_context ccontext;
    + __u8 Name[8];
    + union {
    + __u8 Reserved[8];
    + __u64 data;
    + } Data;
    +} __packed;
    +
    +struct create_durable_v2_rsp {
    + struct create_context ccontext;
    + __u8 Name[8];
    + __le32 Timeout;
    + __le32 Flags;
    +} __packed;
    +
    +struct create_mxac_rsp {
    + struct create_context ccontext;
    + __u8 Name[8];
    + __le32 QueryStatus;
    + __le32 MaximalAccess;
    +} __packed;
    +
    +struct create_disk_id_rsp {
    + struct create_context ccontext;
    + __u8 Name[8];
    + __le64 DiskFileId;
    + __le64 VolumeId;
    + __u8 Reserved[16];
    +} __packed;
    +
    +/* equivalent of the contents of SMB3.1.1 POSIX open context response */
    +struct create_posix_rsp {
    + struct create_context ccontext;
    + __u8 Name[16];
    + __le32 nlink;
    + __le32 reparse_tag;
    + __le32 mode;
    + u8 SidBuffer[40];
    +} __packed;
    +
    +#define SMB2_LEASE_NONE_LE cpu_to_le32(0x00)
    +#define SMB2_LEASE_READ_CACHING_LE cpu_to_le32(0x01)
    +#define SMB2_LEASE_HANDLE_CACHING_LE cpu_to_le32(0x02)
    +#define SMB2_LEASE_WRITE_CACHING_LE cpu_to_le32(0x04)
    +
    +#define SMB2_LEASE_FLAG_BREAK_IN_PROGRESS_LE cpu_to_le32(0x02)
    +
    +struct lease_context {
    + __le64 LeaseKeyLow;
    + __le64 LeaseKeyHigh;
    + __le32 LeaseState;
    + __le32 LeaseFlags;
    + __le64 LeaseDuration;
    +} __packed;
    +
    +struct create_lease {
    + struct create_context ccontext;
    + __u8 Name[8];
    + struct lease_context lcontext;
    +} __packed;
    +
    +/* Currently defined values for close flags */
    +#define SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB cpu_to_le16(0x0001)
    +struct smb2_close_req {
    + struct smb2_hdr hdr;
    + __le16 StructureSize; /* Must be 24 */
    + __le16 Flags;
    + __le32 Reserved;
    + __le64 PersistentFileId;
    + __le64 VolatileFileId;
    +} __packed;
    +
    +struct smb2_close_rsp {
    + struct smb2_hdr hdr;
    + __le16 StructureSize; /* 60 */
    + __le16 Flags;
    + __le32 Reserved;
    + __le64 CreationTime;
    + __le64 LastAccessTime;
    + __le64 LastWriteTime;
    + __le64 ChangeTime;
    + __le64 AllocationSize; /* Beginning of FILE_STANDARD_INFO equivalent */
    + __le64 EndOfFile;
    + __le32 Attributes;
    +} __packed;
    +
    +struct smb2_flush_req {
    + struct smb2_hdr hdr;
    + __le16 StructureSize; /* Must be 24 */
    + __le16 Reserved1;
    + __le32 Reserved2;
    + __le64 PersistentFileId;
    + __le64 VolatileFileId;
    +} __packed;
    +
    +struct smb2_flush_rsp {
    + struct smb2_hdr hdr;
    + __le16 StructureSize;
    + __le16 Reserved;
    +} __packed;
    +
    +struct smb2_buffer_desc_v1 {
    + __le64 offset;
    + __le32 token;
    + __le32 length;
    +} __packed;
    +
    +#define SMB2_CHANNEL_NONE cpu_to_le32(0x00000000)
    +#define SMB2_CHANNEL_RDMA_V1 cpu_to_le32(0x00000001)
    +#define SMB2_CHANNEL_RDMA_V1_INVALIDATE cpu_to_le32(0x00000002)
    +
    +struct smb2_read_req {
    + struct smb2_hdr hdr;
    + __le16 StructureSize; /* Must be 49 */
    + __u8 Padding; /* offset from start of SMB2 header to place read */
    + __u8 Reserved;
    + __le32 Length;
    + __le64 Offset;
    + __le64 PersistentFileId;
    + __le64 VolatileFileId;
    + __le32 MinimumCount;
    + __le32 Channel; /* Reserved MBZ */
    + __le32 RemainingBytes;
    + __le16 ReadChannelInfoOffset; /* Reserved MBZ */
    + __le16 ReadChannelInfoLength; /* Reserved MBZ */
    + __u8 Buffer[1];
    +} __packed;
    +
    +struct smb2_read_rsp {
    + struct smb2_hdr hdr;
    + __le16 StructureSize; /* Must be 17 */
    + __u8 DataOffset;
    + __u8 Reserved;
    + __le32 DataLength;
    + __le32 DataRemaining;
    + __u32 Reserved2;
    + __u8 Buffer[1];
    +} __packed;
    +
    +/* For write request Flags field below the following flag is defined: */
    +#define SMB2_WRITEFLAG_WRITE_THROUGH 0x00000001
    +
    +struct smb2_write_req {
    + struct smb2_hdr hdr;
    + __le16 StructureSize; /* Must be 49 */
    + __le16 DataOffset; /* offset from start of SMB2 header to write data */
    + __le32 Length;
    + __le64 Offset;
    + __le64 PersistentFileId;
    + __le64 VolatileFileId;
    + __le32 Channel; /* Reserved MBZ */
    + __le32 RemainingBytes;
    + __le16 WriteChannelInfoOffset; /* Reserved MBZ */
    + __le16 WriteChannelInfoLength; /* Reserved MBZ */
    + __le32 Flags;
    + __u8 Buffer[1];
    +} __packed;
    +
    +struct smb2_write_rsp {
    + struct smb2_hdr hdr;
    + __le16 StructureSize; /* Must be 17 */
    + __u8 DataOffset;
    + __u8 Reserved;
    + __le32 DataLength;
    + __le32 DataRemaining;
    + __u32 Reserved2;
    + __u8 Buffer[1];
    +} __packed;
    +
    +#define SMB2_0_IOCTL_IS_FSCTL 0x00000001
    +
    +struct duplicate_extents_to_file {
    + __u64 PersistentFileHandle; /* source file handle, opaque endianness */
    + __u64 VolatileFileHandle;
    + __le64 SourceFileOffset;
    + __le64 TargetFileOffset;
    + __le64 ByteCount; /* Bytes to be copied */
    +} __packed;
    +
    +struct smb2_ioctl_req {
    + struct smb2_hdr hdr;
    + __le16 StructureSize; /* Must be 57 */
    + __le16 Reserved; /* offset from start of SMB2 header to write data */
    + __le32 CntCode;
    + __le64 PersistentFileId;
    + __le64 VolatileFileId;
    + __le32 InputOffset; /* Reserved MBZ */
    + __le32 InputCount;
    + __le32 MaxInputResponse;
    + __le32 OutputOffset;
    + __le32 OutputCount;
    + __le32 MaxOutputResponse;
    + __le32 Flags;
    + __le32 Reserved2;
    + __u8 Buffer[1];
    +} __packed;
    +
    +struct smb2_ioctl_rsp {
    + struct smb2_hdr hdr;
    + __le16 StructureSize; /* Must be 49 */
    + __le16 Reserved; /* offset from start of SMB2 header to write data */
    + __le32 CntCode;
    + __le64 PersistentFileId;
    + __le64 VolatileFileId;
    + __le32 InputOffset; /* Reserved MBZ */
    + __le32 InputCount;
    + __le32 OutputOffset;
    + __le32 OutputCount;
    + __le32 Flags;
    + __le32 Reserved2;
    + __u8 Buffer[1];
    +} __packed;
    +
    +struct validate_negotiate_info_req {
    + __le32 Capabilities;
    + __u8 Guid[SMB2_CLIENT_GUID_SIZE];
    + __le16 SecurityMode;
    + __le16 DialectCount;
    + __le16 Dialects[1]; /* dialect (someday maybe list) client asked for */
    +} __packed;
    +
    +struct validate_negotiate_info_rsp {
    + __le32 Capabilities;
    + __u8 Guid[SMB2_CLIENT_GUID_SIZE];
    + __le16 SecurityMode;
    + __le16 Dialect; /* Dialect in use for the connection */
    +} __packed;
    +
    +struct smb_sockaddr_in {
    + __be16 Port;
    + __be32 IPv4address;
    + __u8 Reserved[8];
    +} __packed;
    +
    +struct smb_sockaddr_in6 {
    + __be16 Port;
    + __be32 FlowInfo;
    + __u8 IPv6address[16];
    + __be32 ScopeId;
    +} __packed;
    +
    +#define INTERNETWORK 0x0002
    +#define INTERNETWORKV6 0x0017
    +
    +struct sockaddr_storage_rsp {
    + __le16 Family;
    + union {
    + struct smb_sockaddr_in addr4;
    + struct smb_sockaddr_in6 addr6;
    + };
    +} __packed;
    +
    +#define RSS_CAPABLE 0x00000001
    +#define RDMA_CAPABLE 0x00000002
    +
    +struct network_interface_info_ioctl_rsp {
    + __le32 Next; /* next interface. zero if this is last one */
    + __le32 IfIndex;
    + __le32 Capability; /* RSS or RDMA Capable */
    + __le32 Reserved;
    + __le64 LinkSpeed;
    + char SockAddr_Storage[128];
    +} __packed;
    +
    +struct file_object_buf_type1_ioctl_rsp {
    + __u8 ObjectId[16];
    + __u8 BirthVolumeId[16];
    + __u8 BirthObjectId[16];
    + __u8 DomainId[16];
    +} __packed;
    +
    +struct resume_key_ioctl_rsp {
    + __le64 ResumeKey[3];
    + __le32 ContextLength;
    + __u8 Context[4]; /* ignored, Windows sets to 4 bytes of zero */
    +} __packed;
    +
    +struct copychunk_ioctl_req {
    + __le64 ResumeKey[3];
    + __le32 ChunkCount;
    + __le32 Reserved;
    + __u8 Chunks[1]; /* array of srv_copychunk */
    +} __packed;
    +
    +struct srv_copychunk {
    + __le64 SourceOffset;
    + __le64 TargetOffset;
    + __le32 Length;
    + __le32 Reserved;
    +} __packed;
    +
    +struct copychunk_ioctl_rsp {
    + __le32 ChunksWritten;
    + __le32 ChunkBytesWritten;
    + __le32 TotalBytesWritten;
    +} __packed;
    +
    +struct file_sparse {
    + __u8 SetSparse;
    +} __packed;
    +
    +struct file_zero_data_information {
    + __le64 FileOffset;
    + __le64 BeyondFinalZero;
    +} __packed;
    +
    +struct file_allocated_range_buffer {
    + __le64 file_offset;
    + __le64 length;
    +} __packed;
    +
    +struct reparse_data_buffer {
    + __le32 ReparseTag;
    + __le16 ReparseDataLength;
    + __u16 Reserved;
    + __u8 DataBuffer[]; /* Variable Length */
    +} __packed;
    +
    +/* Completion Filter flags for Notify */
    +#define FILE_NOTIFY_CHANGE_FILE_NAME 0x00000001
    +#define FILE_NOTIFY_CHANGE_DIR_NAME 0x00000002
    +#define FILE_NOTIFY_CHANGE_NAME 0x00000003
    +#define FILE_NOTIFY_CHANGE_ATTRIBUTES 0x00000004
    +#define FILE_NOTIFY_CHANGE_SIZE 0x00000008
    +#define FILE_NOTIFY_CHANGE_LAST_WRITE 0x00000010
    +#define FILE_NOTIFY_CHANGE_LAST_ACCESS 0x00000020
    +#define FILE_NOTIFY_CHANGE_CREATION 0x00000040
    +#define FILE_NOTIFY_CHANGE_EA 0x00000080
    +#define FILE_NOTIFY_CHANGE_SECURITY 0x00000100
    +#define FILE_NOTIFY_CHANGE_STREAM_NAME 0x00000200
    +#define FILE_NOTIFY_CHANGE_STREAM_SIZE 0x00000400
    +#define FILE_NOTIFY_CHANGE_STREAM_WRITE 0x00000800
    +
    +/* Flags */
    +#define SMB2_WATCH_TREE 0x0001
    +
    +struct smb2_notify_req {
    + struct smb2_hdr hdr;
    + __le16 StructureSize; /* Must be 32 */
    + __le16 Flags;
    + __le32 OutputBufferLength;
    + __le64 PersistentFileId;
    + __le64 VolatileFileId;
    + __u32 CompletionFileter;
    + __u32 Reserved;
    +} __packed;
    +
    +struct smb2_notify_rsp {
    + struct smb2_hdr hdr;
    + __le16 StructureSize; /* Must be 9 */
    + __le16 OutputBufferOffset;
    + __le32 OutputBufferLength;
    + __u8 Buffer[1];
    +} __packed;
    +
    +/* SMB2 Notify Action Flags */
    +#define FILE_ACTION_ADDED 0x00000001
    +#define FILE_ACTION_REMOVED 0x00000002
    +#define FILE_ACTION_MODIFIED 0x00000003
    +#define FILE_ACTION_RENAMED_OLD_NAME 0x00000004
    +#define FILE_ACTION_RENAMED_NEW_NAME 0x00000005
    +#define FILE_ACTION_ADDED_STREAM 0x00000006
    +#define FILE_ACTION_REMOVED_STREAM 0x00000007
    +#define FILE_ACTION_MODIFIED_STREAM 0x00000008
    +#define FILE_ACTION_REMOVED_BY_DELETE 0x00000009
    +
    +#define SMB2_LOCKFLAG_SHARED 0x0001
    +#define SMB2_LOCKFLAG_EXCLUSIVE 0x0002
    +#define SMB2_LOCKFLAG_UNLOCK 0x0004
    +#define SMB2_LOCKFLAG_FAIL_IMMEDIATELY 0x0010
    +#define SMB2_LOCKFLAG_MASK 0x0007
    +
    +struct smb2_lock_element {
    + __le64 Offset;
    + __le64 Length;
    + __le32 Flags;
    + __le32 Reserved;
    +} __packed;
    +
    +struct smb2_lock_req {
    + struct smb2_hdr hdr;
    + __le16 StructureSize; /* Must be 48 */
    + __le16 LockCount;
    + __le32 Reserved;
    + __le64 PersistentFileId;
    + __le64 VolatileFileId;
    + /* Followed by at least one */
    + struct smb2_lock_element locks[1];
    +} __packed;
    +
    +struct smb2_lock_rsp {
    + struct smb2_hdr hdr;
    + __le16 StructureSize; /* Must be 4 */
    + __le16 Reserved;
    +} __packed;
    +
    +struct smb2_echo_req {
    + struct smb2_hdr hdr;
    + __le16 StructureSize; /* Must be 4 */
    + __u16 Reserved;
    +} __packed;
    +
    +struct smb2_echo_rsp {
    + struct smb2_hdr hdr;
    + __le16 StructureSize; /* Must be 4 */
    + __u16 Reserved;
    +} __packed;
    +
    +/* search (query_directory) Flags field */
    +#define SMB2_RESTART_SCANS 0x01
    +#define SMB2_RETURN_SINGLE_ENTRY 0x02
    +#define SMB2_INDEX_SPECIFIED 0x04
    +#define SMB2_REOPEN 0x10
    +
    +struct smb2_query_directory_req {
    + struct smb2_hdr hdr;
    + __le16 StructureSize; /* Must be 33 */
    + __u8 FileInformationClass;
    + __u8 Flags;
    + __le32 FileIndex;
    + __le64 PersistentFileId;
    + __le64 VolatileFileId;
    + __le16 FileNameOffset;
    + __le16 FileNameLength;
    + __le32 OutputBufferLength;
    + __u8 Buffer[1];
    +} __packed;
    +
    +struct smb2_query_directory_rsp {
    + struct smb2_hdr hdr;
    + __le16 StructureSize; /* Must be 9 */
    + __le16 OutputBufferOffset;
    + __le32 OutputBufferLength;
    + __u8 Buffer[1];
    +} __packed;
    +
    +/* Possible InfoType values */
    +#define SMB2_O_INFO_FILE 0x01
    +#define SMB2_O_INFO_FILESYSTEM 0x02
    +#define SMB2_O_INFO_SECURITY 0x03
    +#define SMB2_O_INFO_QUOTA 0x04
    +
    +/* Security info type additionalinfo flags. See MS-SMB2 (2.2.37) or MS-DTYP */
    +#define OWNER_SECINFO 0x00000001
    +#define GROUP_SECINFO 0x00000002
    +#define DACL_SECINFO 0x00000004
    +#define SACL_SECINFO 0x00000008
    +#define LABEL_SECINFO 0x00000010
    +#define ATTRIBUTE_SECINFO 0x00000020
    +#define SCOPE_SECINFO 0x00000040
    +#define BACKUP_SECINFO 0x00010000
    +#define UNPROTECTED_SACL_SECINFO 0x10000000
    +#define UNPROTECTED_DACL_SECINFO 0x20000000
    +#define PROTECTED_SACL_SECINFO 0x40000000
    +#define PROTECTED_DACL_SECINFO 0x80000000
    +
    +struct smb2_query_info_req {
    + struct smb2_hdr hdr;
    + __le16 StructureSize; /* Must be 41 */
    + __u8 InfoType;
    + __u8 FileInfoClass;
    + __le32 OutputBufferLength;
    + __le16 InputBufferOffset;
    + __u16 Reserved;
    + __le32 InputBufferLength;
    + __le32 AdditionalInformation;
    + __le32 Flags;
    + __le64 PersistentFileId;
    + __le64 VolatileFileId;
    + __u8 Buffer[1];
    +} __packed;
    +
    +struct smb2_query_info_rsp {
    + struct smb2_hdr hdr;
    + __le16 StructureSize; /* Must be 9 */
    + __le16 OutputBufferOffset;
    + __le32 OutputBufferLength;
    + __u8 Buffer[1];
    +} __packed;
    +
    +struct smb2_set_info_req {
    + struct smb2_hdr hdr;
    + __le16 StructureSize; /* Must be 33 */
    + __u8 InfoType;
    + __u8 FileInfoClass;
    + __le32 BufferLength;
    + __le16 BufferOffset;
    + __u16 Reserved;
    + __le32 AdditionalInformation;
    + __le64 PersistentFileId;
    + __le64 VolatileFileId;
    + __u8 Buffer[1];
    +} __packed;
    +
    +struct smb2_set_info_rsp {
    + struct smb2_hdr hdr;
    + __le16 StructureSize; /* Must be 2 */
    +} __packed;
    +
    +/* FILE Info response size */
    +#define FILE_DIRECTORY_INFORMATION_SIZE 1
    +#define FILE_FULL_DIRECTORY_INFORMATION_SIZE 2
    +#define FILE_BOTH_DIRECTORY_INFORMATION_SIZE 3
    +#define FILE_BASIC_INFORMATION_SIZE 40
    +#define FILE_STANDARD_INFORMATION_SIZE 24
    +#define FILE_INTERNAL_INFORMATION_SIZE 8
    +#define FILE_EA_INFORMATION_SIZE 4
    +#define FILE_ACCESS_INFORMATION_SIZE 4
    +#define FILE_NAME_INFORMATION_SIZE 9
    +#define FILE_RENAME_INFORMATION_SIZE 10
    +#define FILE_LINK_INFORMATION_SIZE 11
    +#define FILE_NAMES_INFORMATION_SIZE 12
    +#define FILE_DISPOSITION_INFORMATION_SIZE 13
    +#define FILE_POSITION_INFORMATION_SIZE 14
    +#define FILE_FULL_EA_INFORMATION_SIZE 15
    +#define FILE_MODE_INFORMATION_SIZE 4
    +#define FILE_ALIGNMENT_INFORMATION_SIZE 4
    +#define FILE_ALL_INFORMATION_SIZE 104
    +#define FILE_ALLOCATION_INFORMATION_SIZE 19
    +#define FILE_END_OF_FILE_INFORMATION_SIZE 20
    +#define FILE_ALTERNATE_NAME_INFORMATION_SIZE 8
    +#define FILE_STREAM_INFORMATION_SIZE 32
    +#define FILE_PIPE_INFORMATION_SIZE 23
    +#define FILE_PIPE_LOCAL_INFORMATION_SIZE 24
    +#define FILE_PIPE_REMOTE_INFORMATION_SIZE 25
    +#define FILE_MAILSLOT_QUERY_INFORMATION_SIZE 26
    +#define FILE_MAILSLOT_SET_INFORMATION_SIZE 27
    +#define FILE_COMPRESSION_INFORMATION_SIZE 16
    +#define FILE_OBJECT_ID_INFORMATION_SIZE 29
    +/* Number 30 not defined in documents */
    +#define FILE_MOVE_CLUSTER_INFORMATION_SIZE 31
    +#define FILE_QUOTA_INFORMATION_SIZE 32
    +#define FILE_REPARSE_POINT_INFORMATION_SIZE 33
    +#define FILE_NETWORK_OPEN_INFORMATION_SIZE 56
    +#define FILE_ATTRIBUTE_TAG_INFORMATION_SIZE 8
    +
    +/* FS Info response size */
    +#define FS_DEVICE_INFORMATION_SIZE 8
    +#define FS_ATTRIBUTE_INFORMATION_SIZE 16
    +#define FS_VOLUME_INFORMATION_SIZE 24
    +#define FS_SIZE_INFORMATION_SIZE 24
    +#define FS_FULL_SIZE_INFORMATION_SIZE 32
    +#define FS_SECTOR_SIZE_INFORMATION_SIZE 28
    +#define FS_OBJECT_ID_INFORMATION_SIZE 64
    +#define FS_CONTROL_INFORMATION_SIZE 48
    +#define FS_POSIX_INFORMATION_SIZE 56
    +
    +/* FS_ATTRIBUTE_File_System_Name */
    +#define FS_TYPE_SUPPORT_SIZE 44
    +struct fs_type_info {
    + char *fs_name;
    + long magic_number;
    +} __packed;
    +
    +struct smb2_oplock_break {
    + struct smb2_hdr hdr;
    + __le16 StructureSize; /* Must be 24 */
    + __u8 OplockLevel;
    + __u8 Reserved;
    + __le32 Reserved2;
    + __le64 PersistentFid;
    + __le64 VolatileFid;
    +} __packed;
    +
    +#define SMB2_NOTIFY_BREAK_LEASE_FLAG_ACK_REQUIRED cpu_to_le32(0x01)
    +
    +struct smb2_lease_break {
    + struct smb2_hdr hdr;
    + __le16 StructureSize; /* Must be 44 */
    + __le16 Reserved;
    + __le32 Flags;
    + __u8 LeaseKey[16];
    + __le32 CurrentLeaseState;
    + __le32 NewLeaseState;
    + __le32 BreakReason;
    + __le32 AccessMaskHint;
    + __le32 ShareMaskHint;
    +} __packed;
    +
    +struct smb2_lease_ack {
    + struct smb2_hdr hdr;
    + __le16 StructureSize; /* Must be 36 */
    + __le16 Reserved;
    + __le32 Flags;
    + __u8 LeaseKey[16];
    + __le32 LeaseState;
    + __le64 LeaseDuration;
    +} __packed;
    +
    +/*
    + * PDU infolevel structure definitions
    + * BB consider moving to a different header
    + */
    +
    +/* File System Information Classes */
    +#define FS_VOLUME_INFORMATION 1 /* Query */
    +#define FS_LABEL_INFORMATION 2 /* Set */
    +#define FS_SIZE_INFORMATION 3 /* Query */
    +#define FS_DEVICE_INFORMATION 4 /* Query */
    +#define FS_ATTRIBUTE_INFORMATION 5 /* Query */
    +#define FS_CONTROL_INFORMATION 6 /* Query, Set */
    +#define FS_FULL_SIZE_INFORMATION 7 /* Query */
    +#define FS_OBJECT_ID_INFORMATION 8 /* Query, Set */
    +#define FS_DRIVER_PATH_INFORMATION 9 /* Query */
    +#define FS_SECTOR_SIZE_INFORMATION 11 /* SMB3 or later. Query */
    +#define FS_POSIX_INFORMATION 100 /* SMB3.1.1 POSIX. Query */
    +
    +struct smb2_fs_full_size_info {
    + __le64 TotalAllocationUnits;
    + __le64 CallerAvailableAllocationUnits;
    + __le64 ActualAvailableAllocationUnits;
    + __le32 SectorsPerAllocationUnit;
    + __le32 BytesPerSector;
    +} __packed;
    +
    +#define SSINFO_FLAGS_ALIGNED_DEVICE 0x00000001
    +#define SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE 0x00000002
    +#define SSINFO_FLAGS_NO_SEEK_PENALTY 0x00000004
    +#define SSINFO_FLAGS_TRIM_ENABLED 0x00000008
    +
    +/* sector size info struct */
    +struct smb3_fs_ss_info {
    + __le32 LogicalBytesPerSector;
    + __le32 PhysicalBytesPerSectorForAtomicity;
    + __le32 PhysicalBytesPerSectorForPerf;
    + __le32 FSEffPhysicalBytesPerSectorForAtomicity;
    + __le32 Flags;
    + __le32 ByteOffsetForSectorAlignment;
    + __le32 ByteOffsetForPartitionAlignment;
    +} __packed;
    +
    +/* File System Control Information */
    +struct smb2_fs_control_info {
    + __le64 FreeSpaceStartFiltering;
    + __le64 FreeSpaceThreshold;
    + __le64 FreeSpaceStopFiltering;
    + __le64 DefaultQuotaThreshold;
    + __le64 DefaultQuotaLimit;
    + __le32 FileSystemControlFlags;
    + __le32 Padding;
    +} __packed;
    +
    +/* partial list of QUERY INFO levels */
    +#define FILE_DIRECTORY_INFORMATION 1
    +#define FILE_FULL_DIRECTORY_INFORMATION 2
    +#define FILE_BOTH_DIRECTORY_INFORMATION 3
    +#define FILE_BASIC_INFORMATION 4
    +#define FILE_STANDARD_INFORMATION 5
    +#define FILE_INTERNAL_INFORMATION 6
    +#define FILE_EA_INFORMATION 7
    +#define FILE_ACCESS_INFORMATION 8
    +#define FILE_NAME_INFORMATION 9
    +#define FILE_RENAME_INFORMATION 10
    +#define FILE_LINK_INFORMATION 11
    +#define FILE_NAMES_INFORMATION 12
    +#define FILE_DISPOSITION_INFORMATION 13
    +#define FILE_POSITION_INFORMATION 14
    +#define FILE_FULL_EA_INFORMATION 15
    +#define FILE_MODE_INFORMATION 16
    +#define FILE_ALIGNMENT_INFORMATION 17
    +#define FILE_ALL_INFORMATION 18
    +#define FILE_ALLOCATION_INFORMATION 19
    +#define FILE_END_OF_FILE_INFORMATION 20
    +#define FILE_ALTERNATE_NAME_INFORMATION 21
    +#define FILE_STREAM_INFORMATION 22
    +#define FILE_PIPE_INFORMATION 23
    +#define FILE_PIPE_LOCAL_INFORMATION 24
    +#define FILE_PIPE_REMOTE_INFORMATION 25
    +#define FILE_MAILSLOT_QUERY_INFORMATION 26
    +#define FILE_MAILSLOT_SET_INFORMATION 27
    +#define FILE_COMPRESSION_INFORMATION 28
    +#define FILE_OBJECT_ID_INFORMATION 29
    +/* Number 30 not defined in documents */
    +#define FILE_MOVE_CLUSTER_INFORMATION 31
    +#define FILE_QUOTA_INFORMATION 32
    +#define FILE_REPARSE_POINT_INFORMATION 33
    +#define FILE_NETWORK_OPEN_INFORMATION 34
    +#define FILE_ATTRIBUTE_TAG_INFORMATION 35
    +#define FILE_TRACKING_INFORMATION 36
    +#define FILEID_BOTH_DIRECTORY_INFORMATION 37
    +#define FILEID_FULL_DIRECTORY_INFORMATION 38
    +#define FILE_VALID_DATA_LENGTH_INFORMATION 39
    +#define FILE_SHORT_NAME_INFORMATION 40
    +#define FILE_SFIO_RESERVE_INFORMATION 44
    +#define FILE_SFIO_VOLUME_INFORMATION 45
    +#define FILE_HARD_LINK_INFORMATION 46
    +#define FILE_NORMALIZED_NAME_INFORMATION 48
    +#define FILEID_GLOBAL_TX_DIRECTORY_INFORMATION 50
    +#define FILE_STANDARD_LINK_INFORMATION 54
    +
    +#define OP_BREAK_STRUCT_SIZE_20 24
    +#define OP_BREAK_STRUCT_SIZE_21 36
    +
    +struct smb2_file_access_info {
    + __le32 AccessFlags;
    +} __packed;
    +
    +struct smb2_file_alignment_info {
    + __le32 AlignmentRequirement;
    +} __packed;
    +
    +struct smb2_file_internal_info {
    + __le64 IndexNumber;
    +} __packed; /* level 6 Query */
    +
    +struct smb2_file_rename_info { /* encoding of request for level 10 */
    + __u8 ReplaceIfExists; /* 1 = replace existing target with new */
    + /* 0 = fail if target already exists */
    + __u8 Reserved[7];
    + __u64 RootDirectory; /* MBZ for network operations (why says spec?) */
    + __le32 FileNameLength;
    + char FileName[0]; /* New name to be assigned */
    +} __packed; /* level 10 Set */
    +
    +struct smb2_file_link_info { /* encoding of request for level 11 */
    + __u8 ReplaceIfExists; /* 1 = replace existing link with new */
    + /* 0 = fail if link already exists */
    + __u8 Reserved[7];
    + __u64 RootDirectory; /* MBZ for network operations (why says spec?) */
    + __le32 FileNameLength;
    + char FileName[0]; /* Name to be assigned to new link */
    +} __packed; /* level 11 Set */
    +
    +/*
    + * This level 18, although with struct with same name is different from cifs
    + * level 0x107. Level 0x107 has an extra u64 between AccessFlags and
    + * CurrentByteOffset.
    + */
    +struct smb2_file_all_info { /* data block encoding of response to level 18 */
    + __le64 CreationTime; /* Beginning of FILE_BASIC_INFO equivalent */
    + __le64 LastAccessTime;
    + __le64 LastWriteTime;
    + __le64 ChangeTime;
    + __le32 Attributes;
    + __u32 Pad1; /* End of FILE_BASIC_INFO_INFO equivalent */
    + __le64 AllocationSize; /* Beginning of FILE_STANDARD_INFO equivalent */
    + __le64 EndOfFile; /* size ie offset to first free byte in file */
    + __le32 NumberOfLinks; /* hard links */
    + __u8 DeletePending;
    + __u8 Directory;
    + __u16 Pad2; /* End of FILE_STANDARD_INFO equivalent */
    + __le64 IndexNumber;
    + __le32 EASize;
    + __le32 AccessFlags;
    + __le64 CurrentByteOffset;
    + __le32 Mode;
    + __le32 AlignmentRequirement;
    + __le32 FileNameLength;
    + char FileName[1];
    +} __packed; /* level 18 Query */
    +
    +struct smb2_file_alt_name_info {
    + __le32 FileNameLength;
    + char FileName[0];
    +} __packed;
    +
    +struct smb2_file_stream_info {
    + __le32 NextEntryOffset;
    + __le32 StreamNameLength;
    + __le64 StreamSize;
    + __le64 StreamAllocationSize;
    + char StreamName[0];
    +} __packed;
    +
    +struct smb2_file_eof_info { /* encoding of request for level 10 */
    + __le64 EndOfFile; /* new end of file value */
    +} __packed; /* level 20 Set */
    +
    +struct smb2_file_ntwrk_info {
    + __le64 CreationTime;
    + __le64 LastAccessTime;
    + __le64 LastWriteTime;
    + __le64 ChangeTime;
    + __le64 AllocationSize;
    + __le64 EndOfFile;
    + __le32 Attributes;
    + __le32 Reserved;
    +} __packed;
    +
    +struct smb2_file_standard_info {
    + __le64 AllocationSize;
    + __le64 EndOfFile;
    + __le32 NumberOfLinks; /* hard links */
    + __u8 DeletePending;
    + __u8 Directory;
    + __le16 Reserved;
    +} __packed; /* level 18 Query */
    +
    +struct smb2_file_ea_info {
    + __le32 EASize;
    +} __packed;
    +
    +struct smb2_file_alloc_info {
    + __le64 AllocationSize;
    +} __packed;
    +
    +struct smb2_file_disposition_info {
    + __u8 DeletePending;
    +} __packed;
    +
    +struct smb2_file_pos_info {
    + __le64 CurrentByteOffset;
    +} __packed;
    +
    +#define FILE_MODE_INFO_MASK cpu_to_le32(0x0000103e)
    +
    +struct smb2_file_mode_info {
    + __le32 Mode;
    +} __packed;
    +
    +#define COMPRESSION_FORMAT_NONE 0x0000
    +#define COMPRESSION_FORMAT_LZNT1 0x0002
    +
    +struct smb2_file_comp_info {
    + __le64 CompressedFileSize;
    + __le16 CompressionFormat;
    + __u8 CompressionUnitShift;
    + __u8 ChunkShift;
    + __u8 ClusterShift;
    + __u8 Reserved[3];
    +} __packed;
    +
    +struct smb2_file_attr_tag_info {
    + __le32 FileAttributes;
    + __le32 ReparseTag;
    +} __packed;
    +
    +#define SL_RESTART_SCAN 0x00000001
    +#define SL_RETURN_SINGLE_ENTRY 0x00000002
    +#define SL_INDEX_SPECIFIED 0x00000004
    +
    +struct smb2_ea_info_req {
    + __le32 NextEntryOffset;
    + __u8 EaNameLength;
    + char name[1];
    +} __packed; /* level 15 Query */
    +
    +struct smb2_ea_info {
    + __le32 NextEntryOffset;
    + __u8 Flags;
    + __u8 EaNameLength;
    + __le16 EaValueLength;
    + char name[1];
    + /* optionally followed by value */
    +} __packed; /* level 15 Query */
    +
    +struct create_ea_buf_req {
    + struct create_context ccontext;
    + __u8 Name[8];
    + struct smb2_ea_info ea;
    +} __packed;
    +
    +struct create_sd_buf_req {
    + struct create_context ccontext;
    + __u8 Name[8];
    + struct smb_ntsd ntsd;
    +} __packed;
    +
    +/* Find File infolevels */
    +#define SMB_FIND_FILE_POSIX_INFO 0x064
    +
    +/* Level 100 query info */
    +struct smb311_posix_qinfo {
    + __le64 CreationTime;
    + __le64 LastAccessTime;
    + __le64 LastWriteTime;
    + __le64 ChangeTime;
    + __le64 EndOfFile;
    + __le64 AllocationSize;
    + __le32 DosAttributes;
    + __le64 Inode;
    + __le32 DeviceId;
    + __le32 Zero;
    + /* beginning of POSIX Create Context Response */
    + __le32 HardLinks;
    + __le32 ReparseTag;
    + __le32 Mode;
    + u8 Sids[];
    + /*
    + * var sized owner SID
    + * var sized group SID
    + * le32 filenamelength
    + * u8 filename[]
    + */
    +} __packed;
    +
    +struct smb2_posix_info {
    + __le32 NextEntryOffset;
    + __u32 Ignored;
    + __le64 CreationTime;
    + __le64 LastAccessTime;
    + __le64 LastWriteTime;
    + __le64 ChangeTime;
    + __le64 EndOfFile;
    + __le64 AllocationSize;
    + __le32 DosAttributes;
    + __le64 Inode;
    + __le32 DeviceId;
    + __le32 Zero;
    + /* beginning of POSIX Create Context Response */
    + __le32 HardLinks;
    + __le32 ReparseTag;
    + __le32 Mode;
    + u8 SidBuffer[40];
    + __le32 name_len;
    + u8 name[1];
    + /*
    + * var sized owner SID
    + * var sized group SID
    + * le32 filenamelength
    + * u8 filename[]
    + */
    +} __packed;
    +
    +/* functions */
    +int init_smb2_0_server(struct ksmbd_conn *conn);
    +void init_smb2_1_server(struct ksmbd_conn *conn);
    +void init_smb3_0_server(struct ksmbd_conn *conn);
    +void init_smb3_02_server(struct ksmbd_conn *conn);
    +int init_smb3_11_server(struct ksmbd_conn *conn);
    +
    +void init_smb2_max_read_size(unsigned int sz);
    +void init_smb2_max_write_size(unsigned int sz);
    +void init_smb2_max_trans_size(unsigned int sz);
    +
    +int is_smb2_neg_cmd(struct ksmbd_work *work);
    +int is_smb2_rsp(struct ksmbd_work *work);
    +
    +u16 get_smb2_cmd_val(struct ksmbd_work *work);
    +void set_smb2_rsp_status(struct ksmbd_work *work, __le32 err);
    +int init_smb2_rsp_hdr(struct ksmbd_work *work);
    +int smb2_allocate_rsp_buf(struct ksmbd_work *work);
    +bool is_chained_smb2_message(struct ksmbd_work *work);
    +int init_smb2_neg_rsp(struct ksmbd_work *work);
    +void smb2_set_err_rsp(struct ksmbd_work *work);
    +int smb2_check_user_session(struct ksmbd_work *work);
    +int smb2_get_ksmbd_tcon(struct ksmbd_work *work);
    +bool smb2_is_sign_req(struct ksmbd_work *work, unsigned int command);
    +int smb2_check_sign_req(struct ksmbd_work *work);
    +void smb2_set_sign_rsp(struct ksmbd_work *work);
    +int smb3_check_sign_req(struct ksmbd_work *work);
    +void smb3_set_sign_rsp(struct ksmbd_work *work);
    +int find_matching_smb2_dialect(int start_index, __le16 *cli_dialects,
    + __le16 dialects_count);
    +struct file_lock *smb_flock_init(struct file *f);
    +int setup_async_work(struct ksmbd_work *work, void (*fn)(void **),
    + void **arg);
    +void smb2_send_interim_resp(struct ksmbd_work *work, __le32 status);
    +struct channel *lookup_chann_list(struct ksmbd_session *sess);
    +void smb3_preauth_hash_rsp(struct ksmbd_work *work);
    +int smb3_is_transform_hdr(void *buf);
    +int smb3_decrypt_req(struct ksmbd_work *work);
    +int smb3_encrypt_resp(struct ksmbd_work *work);
    +bool smb3_11_final_sess_setup_resp(struct ksmbd_work *work);
    +int smb2_set_rsp_credits(struct ksmbd_work *work);
    +
    +/* smb2 misc functions */
    +int ksmbd_smb2_check_message(struct ksmbd_work *work);
    +
    +/* smb2 command handlers */
    +int smb2_handle_negotiate(struct ksmbd_work *work);
    +int smb2_negotiate_request(struct ksmbd_work *work);
    +int smb2_sess_setup(struct ksmbd_work *work);
    +int smb2_tree_connect(struct ksmbd_work *work);
    +int smb2_tree_disconnect(struct ksmbd_work *work);
    +int smb2_session_logoff(struct ksmbd_work *work);
    +int smb2_open(struct ksmbd_work *work);
    +int smb2_query_info(struct ksmbd_work *work);
    +int smb2_query_dir(struct ksmbd_work *work);
    +int smb2_close(struct ksmbd_work *work);
    +int smb2_echo(struct ksmbd_work *work);
    +int smb2_set_info(struct ksmbd_work *work);
    +int smb2_read(struct ksmbd_work *work);
    +int smb2_write(struct ksmbd_work *work);
    +int smb2_flush(struct ksmbd_work *work);
    +int smb2_cancel(struct ksmbd_work *work);
    +int smb2_lock(struct ksmbd_work *work);
    +int smb2_ioctl(struct ksmbd_work *work);
    +int smb2_oplock_break(struct ksmbd_work *work);
    +int smb2_notify(struct ksmbd_work *ksmbd_work);
    +
    +#endif /* _SMB2PDU_H */
    --
    2.17.1
    \
     
     \ /
      Last update: 2021-06-02 05:59    [W:7.393 / U:0.124 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site