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Subject[PATCH v3 16/26] NFS: Move mount parameterisation bits into their own file
Date
From: David Howells <dhowells@redhat.com>

Split various bits relating to mount parameterisation out from
fs/nfs/super.c into their own file to form the basis of filesystem context
handling for NFS.

No other changes are made to the code beyond removing 'static' qualifiers.

Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
fs/nfs/Makefile | 2 +-
fs/nfs/fs_context.c | 1418 +++++++++++++++++++++++++++++++++++++++++++
fs/nfs/internal.h | 29 +
fs/nfs/super.c | 1411 ------------------------------------------
4 files changed, 1448 insertions(+), 1412 deletions(-)
create mode 100644 fs/nfs/fs_context.c

diff --git a/fs/nfs/Makefile b/fs/nfs/Makefile
index 34cdeaecccf6..2433c3e03cfa 100644
--- a/fs/nfs/Makefile
+++ b/fs/nfs/Makefile
@@ -9,7 +9,7 @@ CFLAGS_nfstrace.o += -I$(src)
nfs-y := client.o dir.o file.o getroot.o inode.o super.o \
io.o direct.o pagelist.o read.o symlink.o unlink.o \
write.o namespace.o mount_clnt.o nfstrace.o \
- export.o sysfs.o
+ export.o sysfs.o fs_context.o
nfs-$(CONFIG_ROOT_NFS) += nfsroot.o
nfs-$(CONFIG_SYSCTL) += sysctl.o
nfs-$(CONFIG_NFS_FSCACHE) += fscache.o fscache-index.o
diff --git a/fs/nfs/fs_context.c b/fs/nfs/fs_context.c
new file mode 100644
index 000000000000..82b312a5cdde
--- /dev/null
+++ b/fs/nfs/fs_context.c
@@ -0,0 +1,1418 @@
+/* NFS mount handling.
+ *
+ * Copyright (C) 2018 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ *
+ * Split from fs/nfs/super.c:
+ *
+ * Copyright (C) 1992 Rick Sladkey
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public Licence
+ * as published by the Free Software Foundation; either version
+ * 2 of the Licence, or (at your option) any later version.
+ */
+
+#include <linux/module.h>
+#include <linux/fs.h>
+#include <linux/parser.h>
+#include <linux/nfs_fs.h>
+#include <linux/nfs_mount.h>
+#include <linux/nfs4_mount.h>
+#include "nfs.h"
+#include "internal.h"
+
+#define NFSDBG_FACILITY NFSDBG_MOUNT
+
+#if IS_ENABLED(CONFIG_NFS_V3)
+#define NFS_DEFAULT_VERSION 3
+#else
+#define NFS_DEFAULT_VERSION 2
+#endif
+
+#define NFS_MAX_CONNECTIONS 16
+
+enum {
+ /* Mount options that take no arguments */
+ Opt_soft, Opt_softerr, Opt_hard,
+ Opt_posix, Opt_noposix,
+ Opt_cto, Opt_nocto,
+ Opt_ac, Opt_noac,
+ Opt_lock, Opt_nolock,
+ Opt_udp, Opt_tcp, Opt_rdma,
+ Opt_acl, Opt_noacl,
+ Opt_rdirplus, Opt_nordirplus,
+ Opt_sharecache, Opt_nosharecache,
+ Opt_resvport, Opt_noresvport,
+ Opt_fscache, Opt_nofscache,
+ Opt_migration, Opt_nomigration,
+
+ /* Mount options that take integer arguments */
+ Opt_port,
+ Opt_rsize, Opt_wsize, Opt_bsize,
+ Opt_timeo, Opt_retrans,
+ Opt_acregmin, Opt_acregmax,
+ Opt_acdirmin, Opt_acdirmax,
+ Opt_actimeo,
+ Opt_namelen,
+ Opt_mountport,
+ Opt_mountvers,
+ Opt_minorversion,
+
+ /* Mount options that take string arguments */
+ Opt_nfsvers,
+ Opt_sec, Opt_proto, Opt_mountproto, Opt_mounthost,
+ Opt_addr, Opt_mountaddr, Opt_clientaddr,
+ Opt_nconnect,
+ Opt_lookupcache,
+ Opt_fscache_uniq,
+ Opt_local_lock,
+
+ /* Special mount options */
+ Opt_userspace, Opt_deprecated, Opt_sloppy,
+
+ Opt_err
+};
+
+static const match_table_t nfs_mount_option_tokens = {
+ { Opt_userspace, "bg" },
+ { Opt_userspace, "fg" },
+ { Opt_userspace, "retry=%s" },
+
+ { Opt_sloppy, "sloppy" },
+
+ { Opt_soft, "soft" },
+ { Opt_softerr, "softerr" },
+ { Opt_hard, "hard" },
+ { Opt_deprecated, "intr" },
+ { Opt_deprecated, "nointr" },
+ { Opt_posix, "posix" },
+ { Opt_noposix, "noposix" },
+ { Opt_cto, "cto" },
+ { Opt_nocto, "nocto" },
+ { Opt_ac, "ac" },
+ { Opt_noac, "noac" },
+ { Opt_lock, "lock" },
+ { Opt_nolock, "nolock" },
+ { Opt_udp, "udp" },
+ { Opt_tcp, "tcp" },
+ { Opt_rdma, "rdma" },
+ { Opt_acl, "acl" },
+ { Opt_noacl, "noacl" },
+ { Opt_rdirplus, "rdirplus" },
+ { Opt_nordirplus, "nordirplus" },
+ { Opt_sharecache, "sharecache" },
+ { Opt_nosharecache, "nosharecache" },
+ { Opt_resvport, "resvport" },
+ { Opt_noresvport, "noresvport" },
+ { Opt_fscache, "fsc" },
+ { Opt_nofscache, "nofsc" },
+ { Opt_migration, "migration" },
+ { Opt_nomigration, "nomigration" },
+
+ { Opt_port, "port=%s" },
+ { Opt_rsize, "rsize=%s" },
+ { Opt_wsize, "wsize=%s" },
+ { Opt_bsize, "bsize=%s" },
+ { Opt_timeo, "timeo=%s" },
+ { Opt_retrans, "retrans=%s" },
+ { Opt_acregmin, "acregmin=%s" },
+ { Opt_acregmax, "acregmax=%s" },
+ { Opt_acdirmin, "acdirmin=%s" },
+ { Opt_acdirmax, "acdirmax=%s" },
+ { Opt_actimeo, "actimeo=%s" },
+ { Opt_namelen, "namlen=%s" },
+ { Opt_mountport, "mountport=%s" },
+ { Opt_mountvers, "mountvers=%s" },
+ { Opt_minorversion, "minorversion=%s" },
+
+ { Opt_nfsvers, "nfsvers=%s" },
+ { Opt_nfsvers, "vers=%s" },
+
+ { Opt_sec, "sec=%s" },
+ { Opt_proto, "proto=%s" },
+ { Opt_mountproto, "mountproto=%s" },
+ { Opt_addr, "addr=%s" },
+ { Opt_clientaddr, "clientaddr=%s" },
+ { Opt_mounthost, "mounthost=%s" },
+ { Opt_mountaddr, "mountaddr=%s" },
+
+ { Opt_nconnect, "nconnect=%s" },
+
+ { Opt_lookupcache, "lookupcache=%s" },
+ { Opt_fscache_uniq, "fsc=%s" },
+ { Opt_local_lock, "local_lock=%s" },
+
+ /* The following needs to be listed after all other options */
+ { Opt_nfsvers, "v%s" },
+
+ { Opt_err, NULL }
+};
+
+enum {
+ Opt_xprt_udp, Opt_xprt_udp6, Opt_xprt_tcp, Opt_xprt_tcp6, Opt_xprt_rdma,
+ Opt_xprt_rdma6,
+
+ Opt_xprt_err
+};
+
+static const match_table_t nfs_xprt_protocol_tokens = {
+ { Opt_xprt_udp, "udp" },
+ { Opt_xprt_udp6, "udp6" },
+ { Opt_xprt_tcp, "tcp" },
+ { Opt_xprt_tcp6, "tcp6" },
+ { Opt_xprt_rdma, "rdma" },
+ { Opt_xprt_rdma6, "rdma6" },
+
+ { Opt_xprt_err, NULL }
+};
+
+enum {
+ Opt_sec_none, Opt_sec_sys,
+ Opt_sec_krb5, Opt_sec_krb5i, Opt_sec_krb5p,
+ Opt_sec_lkey, Opt_sec_lkeyi, Opt_sec_lkeyp,
+ Opt_sec_spkm, Opt_sec_spkmi, Opt_sec_spkmp,
+
+ Opt_sec_err
+};
+
+static const match_table_t nfs_secflavor_tokens = {
+ { Opt_sec_none, "none" },
+ { Opt_sec_none, "null" },
+ { Opt_sec_sys, "sys" },
+
+ { Opt_sec_krb5, "krb5" },
+ { Opt_sec_krb5i, "krb5i" },
+ { Opt_sec_krb5p, "krb5p" },
+
+ { Opt_sec_lkey, "lkey" },
+ { Opt_sec_lkeyi, "lkeyi" },
+ { Opt_sec_lkeyp, "lkeyp" },
+
+ { Opt_sec_spkm, "spkm3" },
+ { Opt_sec_spkmi, "spkm3i" },
+ { Opt_sec_spkmp, "spkm3p" },
+
+ { Opt_sec_err, NULL }
+};
+
+enum {
+ Opt_lookupcache_all, Opt_lookupcache_positive,
+ Opt_lookupcache_none,
+
+ Opt_lookupcache_err
+};
+
+static match_table_t nfs_lookupcache_tokens = {
+ { Opt_lookupcache_all, "all" },
+ { Opt_lookupcache_positive, "pos" },
+ { Opt_lookupcache_positive, "positive" },
+ { Opt_lookupcache_none, "none" },
+
+ { Opt_lookupcache_err, NULL }
+};
+
+enum {
+ Opt_local_lock_all, Opt_local_lock_flock, Opt_local_lock_posix,
+ Opt_local_lock_none,
+
+ Opt_local_lock_err
+};
+
+static match_table_t nfs_local_lock_tokens = {
+ { Opt_local_lock_all, "all" },
+ { Opt_local_lock_flock, "flock" },
+ { Opt_local_lock_posix, "posix" },
+ { Opt_local_lock_none, "none" },
+
+ { Opt_local_lock_err, NULL }
+};
+
+enum {
+ Opt_vers_2, Opt_vers_3, Opt_vers_4, Opt_vers_4_0,
+ Opt_vers_4_1, Opt_vers_4_2,
+
+ Opt_vers_err
+};
+
+static match_table_t nfs_vers_tokens = {
+ { Opt_vers_2, "2" },
+ { Opt_vers_3, "3" },
+ { Opt_vers_4, "4" },
+ { Opt_vers_4_0, "4.0" },
+ { Opt_vers_4_1, "4.1" },
+ { Opt_vers_4_2, "4.2" },
+
+ { Opt_vers_err, NULL }
+};
+
+struct nfs_parsed_mount_data *nfs_alloc_parsed_mount_data(void)
+{
+ struct nfs_parsed_mount_data *data;
+
+ data = kzalloc(sizeof(*data), GFP_KERNEL);
+ if (data) {
+ data->timeo = NFS_UNSPEC_TIMEO;
+ data->retrans = NFS_UNSPEC_RETRANS;
+ data->acregmin = NFS_DEF_ACREGMIN;
+ data->acregmax = NFS_DEF_ACREGMAX;
+ data->acdirmin = NFS_DEF_ACDIRMIN;
+ data->acdirmax = NFS_DEF_ACDIRMAX;
+ data->mount_server.port = NFS_UNSPEC_PORT;
+ data->nfs_server.port = NFS_UNSPEC_PORT;
+ data->nfs_server.protocol = XPRT_TRANSPORT_TCP;
+ data->selected_flavor = RPC_AUTH_MAXFLAVOR;
+ data->minorversion = 0;
+ data->need_mount = true;
+ data->net = current->nsproxy->net_ns;
+ data->lsm_opts = NULL;
+ }
+ return data;
+}
+
+void nfs_free_parsed_mount_data(struct nfs_parsed_mount_data *data)
+{
+ if (data) {
+ kfree(data->client_address);
+ kfree(data->mount_server.hostname);
+ kfree(data->nfs_server.export_path);
+ kfree(data->nfs_server.hostname);
+ kfree(data->fscache_uniq);
+ security_free_mnt_opts(&data->lsm_opts);
+ kfree(data);
+ }
+}
+
+/*
+ * Sanity-check a server address provided by the mount command.
+ *
+ * Address family must be initialized, and address must not be
+ * the ANY address for that family.
+ */
+static int nfs_verify_server_address(struct sockaddr *addr)
+{
+ switch (addr->sa_family) {
+ case AF_INET: {
+ struct sockaddr_in *sa = (struct sockaddr_in *)addr;
+ return sa->sin_addr.s_addr != htonl(INADDR_ANY);
+ }
+ case AF_INET6: {
+ struct in6_addr *sa = &((struct sockaddr_in6 *)addr)->sin6_addr;
+ return !ipv6_addr_any(sa);
+ }
+ }
+
+ dfprintk(MOUNT, "NFS: Invalid IP address specified\n");
+ return 0;
+}
+
+/*
+ * Sanity check the NFS transport protocol.
+ *
+ */
+static void nfs_validate_transport_protocol(struct nfs_parsed_mount_data *mnt)
+{
+ switch (mnt->nfs_server.protocol) {
+ case XPRT_TRANSPORT_UDP:
+ case XPRT_TRANSPORT_TCP:
+ case XPRT_TRANSPORT_RDMA:
+ break;
+ default:
+ mnt->nfs_server.protocol = XPRT_TRANSPORT_TCP;
+ }
+}
+
+/*
+ * For text based NFSv2/v3 mounts, the mount protocol transport default
+ * settings should depend upon the specified NFS transport.
+ */
+static void nfs_set_mount_transport_protocol(struct nfs_parsed_mount_data *mnt)
+{
+ nfs_validate_transport_protocol(mnt);
+
+ if (mnt->mount_server.protocol == XPRT_TRANSPORT_UDP ||
+ mnt->mount_server.protocol == XPRT_TRANSPORT_TCP)
+ return;
+ switch (mnt->nfs_server.protocol) {
+ case XPRT_TRANSPORT_UDP:
+ mnt->mount_server.protocol = XPRT_TRANSPORT_UDP;
+ break;
+ case XPRT_TRANSPORT_TCP:
+ case XPRT_TRANSPORT_RDMA:
+ mnt->mount_server.protocol = XPRT_TRANSPORT_TCP;
+ }
+}
+
+/*
+ * Add 'flavor' to 'auth_info' if not already present.
+ * Returns true if 'flavor' ends up in the list, false otherwise
+ */
+static bool nfs_auth_info_add(struct nfs_auth_info *auth_info,
+ rpc_authflavor_t flavor)
+{
+ unsigned int i;
+ unsigned int max_flavor_len = ARRAY_SIZE(auth_info->flavors);
+
+ /* make sure this flavor isn't already in the list */
+ for (i = 0; i < auth_info->flavor_len; i++) {
+ if (flavor == auth_info->flavors[i])
+ return true;
+ }
+
+ if (auth_info->flavor_len + 1 >= max_flavor_len) {
+ dfprintk(MOUNT, "NFS: too many sec= flavors\n");
+ return false;
+ }
+
+ auth_info->flavors[auth_info->flavor_len++] = flavor;
+ return true;
+}
+
+/*
+ * Parse the value of the 'sec=' option.
+ */
+static int nfs_parse_security_flavors(char *value,
+ struct nfs_parsed_mount_data *mnt)
+{
+ substring_t args[MAX_OPT_ARGS];
+ rpc_authflavor_t pseudoflavor;
+ char *p;
+
+ dfprintk(MOUNT, "NFS: parsing sec=%s option\n", value);
+
+ while ((p = strsep(&value, ":")) != NULL) {
+ switch (match_token(p, nfs_secflavor_tokens, args)) {
+ case Opt_sec_none:
+ pseudoflavor = RPC_AUTH_NULL;
+ break;
+ case Opt_sec_sys:
+ pseudoflavor = RPC_AUTH_UNIX;
+ break;
+ case Opt_sec_krb5:
+ pseudoflavor = RPC_AUTH_GSS_KRB5;
+ break;
+ case Opt_sec_krb5i:
+ pseudoflavor = RPC_AUTH_GSS_KRB5I;
+ break;
+ case Opt_sec_krb5p:
+ pseudoflavor = RPC_AUTH_GSS_KRB5P;
+ break;
+ case Opt_sec_lkey:
+ pseudoflavor = RPC_AUTH_GSS_LKEY;
+ break;
+ case Opt_sec_lkeyi:
+ pseudoflavor = RPC_AUTH_GSS_LKEYI;
+ break;
+ case Opt_sec_lkeyp:
+ pseudoflavor = RPC_AUTH_GSS_LKEYP;
+ break;
+ case Opt_sec_spkm:
+ pseudoflavor = RPC_AUTH_GSS_SPKM;
+ break;
+ case Opt_sec_spkmi:
+ pseudoflavor = RPC_AUTH_GSS_SPKMI;
+ break;
+ case Opt_sec_spkmp:
+ pseudoflavor = RPC_AUTH_GSS_SPKMP;
+ break;
+ default:
+ dfprintk(MOUNT,
+ "NFS: sec= option '%s' not recognized\n", p);
+ return 0;
+ }
+
+ if (!nfs_auth_info_add(&mnt->auth_info, pseudoflavor))
+ return 0;
+ }
+
+ return 1;
+}
+
+static int nfs_parse_version_string(char *string,
+ struct nfs_parsed_mount_data *mnt,
+ substring_t *args)
+{
+ mnt->flags &= ~NFS_MOUNT_VER3;
+ switch (match_token(string, nfs_vers_tokens, args)) {
+ case Opt_vers_2:
+ mnt->version = 2;
+ break;
+ case Opt_vers_3:
+ mnt->flags |= NFS_MOUNT_VER3;
+ mnt->version = 3;
+ break;
+ case Opt_vers_4:
+ /* Backward compatibility option. In future,
+ * the mount program should always supply
+ * a NFSv4 minor version number.
+ */
+ mnt->version = 4;
+ break;
+ case Opt_vers_4_0:
+ mnt->version = 4;
+ mnt->minorversion = 0;
+ break;
+ case Opt_vers_4_1:
+ mnt->version = 4;
+ mnt->minorversion = 1;
+ break;
+ case Opt_vers_4_2:
+ mnt->version = 4;
+ mnt->minorversion = 2;
+ break;
+ default:
+ return 0;
+ }
+ return 1;
+}
+
+static int nfs_get_option_str(substring_t args[], char **option)
+{
+ kfree(*option);
+ *option = match_strdup(args);
+ return !*option;
+}
+
+static int nfs_get_option_ul(substring_t args[], unsigned long *option)
+{
+ int rc;
+ char *string;
+
+ string = match_strdup(args);
+ if (string == NULL)
+ return -ENOMEM;
+ rc = kstrtoul(string, 10, option);
+ kfree(string);
+
+ return rc;
+}
+
+static int nfs_get_option_ul_bound(substring_t args[], unsigned long *option,
+ unsigned long l_bound, unsigned long u_bound)
+{
+ int ret;
+
+ ret = nfs_get_option_ul(args, option);
+ if (ret != 0)
+ return ret;
+ if (*option < l_bound || *option > u_bound)
+ return -ERANGE;
+ return 0;
+}
+
+/*
+ * Error-check and convert a string of mount options from user space into
+ * a data structure. The whole mount string is processed; bad options are
+ * skipped as they are encountered. If there were no errors, return 1;
+ * otherwise return 0 (zero).
+ */
+int nfs_parse_mount_options(char *raw, struct nfs_parsed_mount_data *mnt)
+{
+ char *p, *string;
+ int rc, sloppy = 0, invalid_option = 0;
+ unsigned short protofamily = AF_UNSPEC;
+ unsigned short mountfamily = AF_UNSPEC;
+
+ if (!raw) {
+ dfprintk(MOUNT, "NFS: mount options string was NULL.\n");
+ return 1;
+ }
+ dfprintk(MOUNT, "NFS: nfs mount opts='%s'\n", raw);
+
+ rc = security_sb_eat_lsm_opts(raw, &mnt->lsm_opts);
+ if (rc)
+ goto out_security_failure;
+
+ while ((p = strsep(&raw, ",")) != NULL) {
+ substring_t args[MAX_OPT_ARGS];
+ unsigned long option;
+ int token;
+
+ if (!*p)
+ continue;
+
+ dfprintk(MOUNT, "NFS: parsing nfs mount option '%s'\n", p);
+
+ token = match_token(p, nfs_mount_option_tokens, args);
+ switch (token) {
+
+ /*
+ * boolean options: foo/nofoo
+ */
+ case Opt_soft:
+ mnt->flags |= NFS_MOUNT_SOFT;
+ mnt->flags &= ~NFS_MOUNT_SOFTERR;
+ break;
+ case Opt_softerr:
+ mnt->flags |= NFS_MOUNT_SOFTERR;
+ mnt->flags &= ~NFS_MOUNT_SOFT;
+ break;
+ case Opt_hard:
+ mnt->flags &= ~(NFS_MOUNT_SOFT|NFS_MOUNT_SOFTERR);
+ break;
+ case Opt_posix:
+ mnt->flags |= NFS_MOUNT_POSIX;
+ break;
+ case Opt_noposix:
+ mnt->flags &= ~NFS_MOUNT_POSIX;
+ break;
+ case Opt_cto:
+ mnt->flags &= ~NFS_MOUNT_NOCTO;
+ break;
+ case Opt_nocto:
+ mnt->flags |= NFS_MOUNT_NOCTO;
+ break;
+ case Opt_ac:
+ mnt->flags &= ~NFS_MOUNT_NOAC;
+ break;
+ case Opt_noac:
+ mnt->flags |= NFS_MOUNT_NOAC;
+ break;
+ case Opt_lock:
+ mnt->flags &= ~NFS_MOUNT_NONLM;
+ mnt->flags &= ~(NFS_MOUNT_LOCAL_FLOCK |
+ NFS_MOUNT_LOCAL_FCNTL);
+ break;
+ case Opt_nolock:
+ mnt->flags |= NFS_MOUNT_NONLM;
+ mnt->flags |= (NFS_MOUNT_LOCAL_FLOCK |
+ NFS_MOUNT_LOCAL_FCNTL);
+ break;
+ case Opt_udp:
+ mnt->flags &= ~NFS_MOUNT_TCP;
+ mnt->nfs_server.protocol = XPRT_TRANSPORT_UDP;
+ break;
+ case Opt_tcp:
+ mnt->flags |= NFS_MOUNT_TCP;
+ mnt->nfs_server.protocol = XPRT_TRANSPORT_TCP;
+ break;
+ case Opt_rdma:
+ mnt->flags |= NFS_MOUNT_TCP; /* for side protocols */
+ mnt->nfs_server.protocol = XPRT_TRANSPORT_RDMA;
+ xprt_load_transport(p);
+ break;
+ case Opt_acl:
+ mnt->flags &= ~NFS_MOUNT_NOACL;
+ break;
+ case Opt_noacl:
+ mnt->flags |= NFS_MOUNT_NOACL;
+ break;
+ case Opt_rdirplus:
+ mnt->flags &= ~NFS_MOUNT_NORDIRPLUS;
+ break;
+ case Opt_nordirplus:
+ mnt->flags |= NFS_MOUNT_NORDIRPLUS;
+ break;
+ case Opt_sharecache:
+ mnt->flags &= ~NFS_MOUNT_UNSHARED;
+ break;
+ case Opt_nosharecache:
+ mnt->flags |= NFS_MOUNT_UNSHARED;
+ break;
+ case Opt_resvport:
+ mnt->flags &= ~NFS_MOUNT_NORESVPORT;
+ break;
+ case Opt_noresvport:
+ mnt->flags |= NFS_MOUNT_NORESVPORT;
+ break;
+ case Opt_fscache:
+ mnt->options |= NFS_OPTION_FSCACHE;
+ kfree(mnt->fscache_uniq);
+ mnt->fscache_uniq = NULL;
+ break;
+ case Opt_nofscache:
+ mnt->options &= ~NFS_OPTION_FSCACHE;
+ kfree(mnt->fscache_uniq);
+ mnt->fscache_uniq = NULL;
+ break;
+ case Opt_migration:
+ mnt->options |= NFS_OPTION_MIGRATION;
+ break;
+ case Opt_nomigration:
+ mnt->options &= ~NFS_OPTION_MIGRATION;
+ break;
+
+ /*
+ * options that take numeric values
+ */
+ case Opt_port:
+ if (nfs_get_option_ul(args, &option) ||
+ option > USHRT_MAX)
+ goto out_invalid_value;
+ mnt->nfs_server.port = option;
+ break;
+ case Opt_rsize:
+ if (nfs_get_option_ul(args, &option))
+ goto out_invalid_value;
+ mnt->rsize = option;
+ break;
+ case Opt_wsize:
+ if (nfs_get_option_ul(args, &option))
+ goto out_invalid_value;
+ mnt->wsize = option;
+ break;
+ case Opt_bsize:
+ if (nfs_get_option_ul(args, &option))
+ goto out_invalid_value;
+ mnt->bsize = option;
+ break;
+ case Opt_timeo:
+ if (nfs_get_option_ul_bound(args, &option, 1, INT_MAX))
+ goto out_invalid_value;
+ mnt->timeo = option;
+ break;
+ case Opt_retrans:
+ if (nfs_get_option_ul_bound(args, &option, 0, INT_MAX))
+ goto out_invalid_value;
+ mnt->retrans = option;
+ break;
+ case Opt_acregmin:
+ if (nfs_get_option_ul(args, &option))
+ goto out_invalid_value;
+ mnt->acregmin = option;
+ break;
+ case Opt_acregmax:
+ if (nfs_get_option_ul(args, &option))
+ goto out_invalid_value;
+ mnt->acregmax = option;
+ break;
+ case Opt_acdirmin:
+ if (nfs_get_option_ul(args, &option))
+ goto out_invalid_value;
+ mnt->acdirmin = option;
+ break;
+ case Opt_acdirmax:
+ if (nfs_get_option_ul(args, &option))
+ goto out_invalid_value;
+ mnt->acdirmax = option;
+ break;
+ case Opt_actimeo:
+ if (nfs_get_option_ul(args, &option))
+ goto out_invalid_value;
+ mnt->acregmin = mnt->acregmax =
+ mnt->acdirmin = mnt->acdirmax = option;
+ break;
+ case Opt_namelen:
+ if (nfs_get_option_ul(args, &option))
+ goto out_invalid_value;
+ mnt->namlen = option;
+ break;
+ case Opt_mountport:
+ if (nfs_get_option_ul(args, &option) ||
+ option > USHRT_MAX)
+ goto out_invalid_value;
+ mnt->mount_server.port = option;
+ break;
+ case Opt_mountvers:
+ if (nfs_get_option_ul(args, &option) ||
+ option < NFS_MNT_VERSION ||
+ option > NFS_MNT3_VERSION)
+ goto out_invalid_value;
+ mnt->mount_server.version = option;
+ break;
+ case Opt_minorversion:
+ if (nfs_get_option_ul(args, &option))
+ goto out_invalid_value;
+ if (option > NFS4_MAX_MINOR_VERSION)
+ goto out_invalid_value;
+ mnt->minorversion = option;
+ break;
+
+ /*
+ * options that take text values
+ */
+ case Opt_nfsvers:
+ string = match_strdup(args);
+ if (string == NULL)
+ goto out_nomem;
+ rc = nfs_parse_version_string(string, mnt, args);
+ kfree(string);
+ if (!rc)
+ goto out_invalid_value;
+ break;
+ case Opt_sec:
+ string = match_strdup(args);
+ if (string == NULL)
+ goto out_nomem;
+ rc = nfs_parse_security_flavors(string, mnt);
+ kfree(string);
+ if (!rc) {
+ dfprintk(MOUNT, "NFS: unrecognized "
+ "security flavor\n");
+ return 0;
+ }
+ break;
+ case Opt_proto:
+ string = match_strdup(args);
+ if (string == NULL)
+ goto out_nomem;
+ token = match_token(string,
+ nfs_xprt_protocol_tokens, args);
+
+ protofamily = AF_INET;
+ switch (token) {
+ case Opt_xprt_udp6:
+ protofamily = AF_INET6;
+ /* fall through */
+ case Opt_xprt_udp:
+ mnt->flags &= ~NFS_MOUNT_TCP;
+ mnt->nfs_server.protocol = XPRT_TRANSPORT_UDP;
+ break;
+ case Opt_xprt_tcp6:
+ protofamily = AF_INET6;
+ /* fall through */
+ case Opt_xprt_tcp:
+ mnt->flags |= NFS_MOUNT_TCP;
+ mnt->nfs_server.protocol = XPRT_TRANSPORT_TCP;
+ break;
+ case Opt_xprt_rdma6:
+ protofamily = AF_INET6;
+ /* fall through */
+ case Opt_xprt_rdma:
+ /* vector side protocols to TCP */
+ mnt->flags |= NFS_MOUNT_TCP;
+ mnt->nfs_server.protocol = XPRT_TRANSPORT_RDMA;
+ xprt_load_transport(string);
+ break;
+ default:
+ dfprintk(MOUNT, "NFS: unrecognized "
+ "transport protocol\n");
+ kfree(string);
+ return 0;
+ }
+ kfree(string);
+ break;
+ case Opt_mountproto:
+ string = match_strdup(args);
+ if (string == NULL)
+ goto out_nomem;
+ token = match_token(string,
+ nfs_xprt_protocol_tokens, args);
+ kfree(string);
+
+ mountfamily = AF_INET;
+ switch (token) {
+ case Opt_xprt_udp6:
+ mountfamily = AF_INET6;
+ /* fall through */
+ case Opt_xprt_udp:
+ mnt->mount_server.protocol = XPRT_TRANSPORT_UDP;
+ break;
+ case Opt_xprt_tcp6:
+ mountfamily = AF_INET6;
+ /* fall through */
+ case Opt_xprt_tcp:
+ mnt->mount_server.protocol = XPRT_TRANSPORT_TCP;
+ break;
+ case Opt_xprt_rdma: /* not used for side protocols */
+ default:
+ dfprintk(MOUNT, "NFS: unrecognized "
+ "transport protocol\n");
+ return 0;
+ }
+ break;
+ case Opt_addr:
+ string = match_strdup(args);
+ if (string == NULL)
+ goto out_nomem;
+ mnt->nfs_server.addrlen =
+ rpc_pton(mnt->net, string, strlen(string),
+ (struct sockaddr *)
+ &mnt->nfs_server.address,
+ sizeof(mnt->nfs_server.address));
+ kfree(string);
+ if (mnt->nfs_server.addrlen == 0)
+ goto out_invalid_address;
+ break;
+ case Opt_clientaddr:
+ if (nfs_get_option_str(args, &mnt->client_address))
+ goto out_nomem;
+ break;
+ case Opt_mounthost:
+ if (nfs_get_option_str(args,
+ &mnt->mount_server.hostname))
+ goto out_nomem;
+ break;
+ case Opt_mountaddr:
+ string = match_strdup(args);
+ if (string == NULL)
+ goto out_nomem;
+ mnt->mount_server.addrlen =
+ rpc_pton(mnt->net, string, strlen(string),
+ (struct sockaddr *)
+ &mnt->mount_server.address,
+ sizeof(mnt->mount_server.address));
+ kfree(string);
+ if (mnt->mount_server.addrlen == 0)
+ goto out_invalid_address;
+ break;
+ case Opt_nconnect:
+ if (nfs_get_option_ul_bound(args, &option, 1, NFS_MAX_CONNECTIONS))
+ goto out_invalid_value;
+ mnt->nfs_server.nconnect = option;
+ break;
+ case Opt_lookupcache:
+ string = match_strdup(args);
+ if (string == NULL)
+ goto out_nomem;
+ token = match_token(string,
+ nfs_lookupcache_tokens, args);
+ kfree(string);
+ switch (token) {
+ case Opt_lookupcache_all:
+ mnt->flags &= ~(NFS_MOUNT_LOOKUP_CACHE_NONEG|NFS_MOUNT_LOOKUP_CACHE_NONE);
+ break;
+ case Opt_lookupcache_positive:
+ mnt->flags &= ~NFS_MOUNT_LOOKUP_CACHE_NONE;
+ mnt->flags |= NFS_MOUNT_LOOKUP_CACHE_NONEG;
+ break;
+ case Opt_lookupcache_none:
+ mnt->flags |= NFS_MOUNT_LOOKUP_CACHE_NONEG|NFS_MOUNT_LOOKUP_CACHE_NONE;
+ break;
+ default:
+ dfprintk(MOUNT, "NFS: invalid "
+ "lookupcache argument\n");
+ return 0;
+ };
+ break;
+ case Opt_fscache_uniq:
+ if (nfs_get_option_str(args, &mnt->fscache_uniq))
+ goto out_nomem;
+ mnt->options |= NFS_OPTION_FSCACHE;
+ break;
+ case Opt_local_lock:
+ string = match_strdup(args);
+ if (string == NULL)
+ goto out_nomem;
+ token = match_token(string, nfs_local_lock_tokens,
+ args);
+ kfree(string);
+ switch (token) {
+ case Opt_local_lock_all:
+ mnt->flags |= (NFS_MOUNT_LOCAL_FLOCK |
+ NFS_MOUNT_LOCAL_FCNTL);
+ break;
+ case Opt_local_lock_flock:
+ mnt->flags |= NFS_MOUNT_LOCAL_FLOCK;
+ break;
+ case Opt_local_lock_posix:
+ mnt->flags |= NFS_MOUNT_LOCAL_FCNTL;
+ break;
+ case Opt_local_lock_none:
+ mnt->flags &= ~(NFS_MOUNT_LOCAL_FLOCK |
+ NFS_MOUNT_LOCAL_FCNTL);
+ break;
+ default:
+ dfprintk(MOUNT, "NFS: invalid "
+ "local_lock argument\n");
+ return 0;
+ };
+ break;
+
+ /*
+ * Special options
+ */
+ case Opt_sloppy:
+ sloppy = 1;
+ dfprintk(MOUNT, "NFS: relaxing parsing rules\n");
+ break;
+ case Opt_userspace:
+ case Opt_deprecated:
+ dfprintk(MOUNT, "NFS: ignoring mount option "
+ "'%s'\n", p);
+ break;
+
+ default:
+ invalid_option = 1;
+ dfprintk(MOUNT, "NFS: unrecognized mount option "
+ "'%s'\n", p);
+ }
+ }
+
+ if (!sloppy && invalid_option)
+ return 0;
+
+ if (mnt->minorversion && mnt->version != 4)
+ goto out_minorversion_mismatch;
+
+ if (mnt->options & NFS_OPTION_MIGRATION &&
+ (mnt->version != 4 || mnt->minorversion != 0))
+ goto out_migration_misuse;
+
+ /*
+ * verify that any proto=/mountproto= options match the address
+ * families in the addr=/mountaddr= options.
+ */
+ if (protofamily != AF_UNSPEC &&
+ protofamily != mnt->nfs_server.address.ss_family)
+ goto out_proto_mismatch;
+
+ if (mountfamily != AF_UNSPEC) {
+ if (mnt->mount_server.addrlen) {
+ if (mountfamily != mnt->mount_server.address.ss_family)
+ goto out_mountproto_mismatch;
+ } else {
+ if (mountfamily != mnt->nfs_server.address.ss_family)
+ goto out_mountproto_mismatch;
+ }
+ }
+
+ return 1;
+
+out_mountproto_mismatch:
+ printk(KERN_INFO "NFS: mount server address does not match mountproto= "
+ "option\n");
+ return 0;
+out_proto_mismatch:
+ printk(KERN_INFO "NFS: server address does not match proto= option\n");
+ return 0;
+out_invalid_address:
+ printk(KERN_INFO "NFS: bad IP address specified: %s\n", p);
+ return 0;
+out_invalid_value:
+ printk(KERN_INFO "NFS: bad mount option value specified: %s\n", p);
+ return 0;
+out_minorversion_mismatch:
+ printk(KERN_INFO "NFS: mount option vers=%u does not support "
+ "minorversion=%u\n", mnt->version, mnt->minorversion);
+ return 0;
+out_migration_misuse:
+ printk(KERN_INFO
+ "NFS: 'migration' not supported for this NFS version\n");
+ return 0;
+out_nomem:
+ printk(KERN_INFO "NFS: not enough memory to parse option\n");
+ return 0;
+out_security_failure:
+ printk(KERN_INFO "NFS: security options invalid: %d\n", rc);
+ return 0;
+}
+
+/*
+ * Split "dev_name" into "hostname:export_path".
+ *
+ * The leftmost colon demarks the split between the server's hostname
+ * and the export path. If the hostname starts with a left square
+ * bracket, then it may contain colons.
+ *
+ * Note: caller frees hostname and export path, even on error.
+ */
+static int nfs_parse_devname(const char *dev_name,
+ char **hostname, size_t maxnamlen,
+ char **export_path, size_t maxpathlen)
+{
+ size_t len;
+ char *end;
+
+ if (unlikely(!dev_name || !*dev_name)) {
+ dfprintk(MOUNT, "NFS: device name not specified\n");
+ return -EINVAL;
+ }
+
+ /* Is the host name protected with square brakcets? */
+ if (*dev_name == '[') {
+ end = strchr(++dev_name, ']');
+ if (end == NULL || end[1] != ':')
+ goto out_bad_devname;
+
+ len = end - dev_name;
+ end++;
+ } else {
+ char *comma;
+
+ end = strchr(dev_name, ':');
+ if (end == NULL)
+ goto out_bad_devname;
+ len = end - dev_name;
+
+ /* kill possible hostname list: not supported */
+ comma = strchr(dev_name, ',');
+ if (comma != NULL && comma < end)
+ len = comma - dev_name;
+ }
+
+ if (len > maxnamlen)
+ goto out_hostname;
+
+ /* N.B. caller will free nfs_server.hostname in all cases */
+ *hostname = kstrndup(dev_name, len, GFP_KERNEL);
+ if (*hostname == NULL)
+ goto out_nomem;
+ len = strlen(++end);
+ if (len > maxpathlen)
+ goto out_path;
+ *export_path = kstrndup(end, len, GFP_KERNEL);
+ if (!*export_path)
+ goto out_nomem;
+
+ dfprintk(MOUNT, "NFS: MNTPATH: '%s'\n", *export_path);
+ return 0;
+
+out_bad_devname:
+ dfprintk(MOUNT, "NFS: device name not in host:path format\n");
+ return -EINVAL;
+
+out_nomem:
+ dfprintk(MOUNT, "NFS: not enough memory to parse device name\n");
+ return -ENOMEM;
+
+out_hostname:
+ dfprintk(MOUNT, "NFS: server hostname too long\n");
+ return -ENAMETOOLONG;
+
+out_path:
+ dfprintk(MOUNT, "NFS: export pathname too long\n");
+ return -ENAMETOOLONG;
+}
+
+/*
+ * Validate the NFS2/NFS3 mount data
+ * - fills in the mount root filehandle
+ *
+ * For option strings, user space handles the following behaviors:
+ *
+ * + DNS: mapping server host name to IP address ("addr=" option)
+ *
+ * + failure mode: how to behave if a mount request can't be handled
+ * immediately ("fg/bg" option)
+ *
+ * + retry: how often to retry a mount request ("retry=" option)
+ *
+ * + breaking back: trying proto=udp after proto=tcp, v2 after v3,
+ * mountproto=tcp after mountproto=udp, and so on
+ */
+static int nfs23_validate_mount_data(void *options,
+ struct nfs_parsed_mount_data *args,
+ struct nfs_fh *mntfh,
+ const char *dev_name)
+{
+ struct nfs_mount_data *data = (struct nfs_mount_data *)options;
+ struct sockaddr *sap = (struct sockaddr *)&args->nfs_server.address;
+ int extra_flags = NFS_MOUNT_LEGACY_INTERFACE;
+
+ if (data == NULL)
+ goto out_no_data;
+
+ args->version = NFS_DEFAULT_VERSION;
+ switch (data->version) {
+ case 1:
+ data->namlen = 0; /* fall through */
+ case 2:
+ data->bsize = 0; /* fall through */
+ case 3:
+ if (data->flags & NFS_MOUNT_VER3)
+ goto out_no_v3;
+ data->root.size = NFS2_FHSIZE;
+ memcpy(data->root.data, data->old_root.data, NFS2_FHSIZE);
+ /* Turn off security negotiation */
+ extra_flags |= NFS_MOUNT_SECFLAVOUR;
+ /* fall through */
+ case 4:
+ if (data->flags & NFS_MOUNT_SECFLAVOUR)
+ goto out_no_sec;
+ /* fall through */
+ case 5:
+ memset(data->context, 0, sizeof(data->context));
+ /* fall through */
+ case 6:
+ if (data->flags & NFS_MOUNT_VER3) {
+ if (data->root.size > NFS3_FHSIZE || data->root.size == 0)
+ goto out_invalid_fh;
+ mntfh->size = data->root.size;
+ args->version = 3;
+ } else {
+ mntfh->size = NFS2_FHSIZE;
+ args->version = 2;
+ }
+
+
+ memcpy(mntfh->data, data->root.data, mntfh->size);
+ if (mntfh->size < sizeof(mntfh->data))
+ memset(mntfh->data + mntfh->size, 0,
+ sizeof(mntfh->data) - mntfh->size);
+
+ /*
+ * Translate to nfs_parsed_mount_data, which nfs_fill_super
+ * can deal with.
+ */
+ args->flags = data->flags & NFS_MOUNT_FLAGMASK;
+ args->flags |= extra_flags;
+ args->rsize = data->rsize;
+ args->wsize = data->wsize;
+ args->timeo = data->timeo;
+ args->retrans = data->retrans;
+ args->acregmin = data->acregmin;
+ args->acregmax = data->acregmax;
+ args->acdirmin = data->acdirmin;
+ args->acdirmax = data->acdirmax;
+ args->need_mount = false;
+
+ memcpy(sap, &data->addr, sizeof(data->addr));
+ args->nfs_server.addrlen = sizeof(data->addr);
+ args->nfs_server.port = ntohs(data->addr.sin_port);
+ if (sap->sa_family != AF_INET ||
+ !nfs_verify_server_address(sap))
+ goto out_no_address;
+
+ if (!(data->flags & NFS_MOUNT_TCP))
+ args->nfs_server.protocol = XPRT_TRANSPORT_UDP;
+ /* N.B. caller will free nfs_server.hostname in all cases */
+ args->nfs_server.hostname = kstrdup(data->hostname, GFP_KERNEL);
+ args->namlen = data->namlen;
+ args->bsize = data->bsize;
+
+ if (data->flags & NFS_MOUNT_SECFLAVOUR)
+ args->selected_flavor = data->pseudoflavor;
+ else
+ args->selected_flavor = RPC_AUTH_UNIX;
+ if (!args->nfs_server.hostname)
+ goto out_nomem;
+
+ if (!(data->flags & NFS_MOUNT_NONLM))
+ args->flags &= ~(NFS_MOUNT_LOCAL_FLOCK|
+ NFS_MOUNT_LOCAL_FCNTL);
+ else
+ args->flags |= (NFS_MOUNT_LOCAL_FLOCK|
+ NFS_MOUNT_LOCAL_FCNTL);
+ /*
+ * The legacy version 6 binary mount data from userspace has a
+ * field used only to transport selinux information into the
+ * the kernel. To continue to support that functionality we
+ * have a touch of selinux knowledge here in the NFS code. The
+ * userspace code converted context=blah to just blah so we are
+ * converting back to the full string selinux understands.
+ */
+ if (data->context[0]){
+#ifdef CONFIG_SECURITY_SELINUX
+ int rc;
+ data->context[NFS_MAX_CONTEXT_LEN] = '\0';
+ rc = security_add_mnt_opt("context", data->context,
+ strlen(data->context), &args->lsm_opts);
+ if (rc)
+ return rc;
+#else
+ return -EINVAL;
+#endif
+ }
+
+ break;
+ default:
+ return NFS_TEXT_DATA;
+ }
+
+ return 0;
+
+out_no_data:
+ dfprintk(MOUNT, "NFS: mount program didn't pass any mount data\n");
+ return -EINVAL;
+
+out_no_v3:
+ dfprintk(MOUNT, "NFS: nfs_mount_data version %d does not support v3\n",
+ data->version);
+ return -EINVAL;
+
+out_no_sec:
+ dfprintk(MOUNT, "NFS: nfs_mount_data version supports only AUTH_SYS\n");
+ return -EINVAL;
+
+out_nomem:
+ dfprintk(MOUNT, "NFS: not enough memory to handle mount options\n");
+ return -ENOMEM;
+
+out_no_address:
+ dfprintk(MOUNT, "NFS: mount program didn't pass remote address\n");
+ return -EINVAL;
+
+out_invalid_fh:
+ dfprintk(MOUNT, "NFS: invalid root filehandle\n");
+ return -EINVAL;
+}
+
+#if IS_ENABLED(CONFIG_NFS_V4)
+
+static void nfs4_validate_mount_flags(struct nfs_parsed_mount_data *args)
+{
+ args->flags &= ~(NFS_MOUNT_NONLM|NFS_MOUNT_NOACL|NFS_MOUNT_VER3|
+ NFS_MOUNT_LOCAL_FLOCK|NFS_MOUNT_LOCAL_FCNTL);
+}
+
+/*
+ * Validate NFSv4 mount options
+ */
+static int nfs4_validate_mount_data(void *options,
+ struct nfs_parsed_mount_data *args,
+ const char *dev_name)
+{
+ struct sockaddr *sap = (struct sockaddr *)&args->nfs_server.address;
+ struct nfs4_mount_data *data = (struct nfs4_mount_data *)options;
+ char *c;
+
+ if (data == NULL)
+ goto out_no_data;
+
+ args->version = 4;
+
+ switch (data->version) {
+ case 1:
+ if (data->host_addrlen > sizeof(args->nfs_server.address))
+ goto out_no_address;
+ if (data->host_addrlen == 0)
+ goto out_no_address;
+ args->nfs_server.addrlen = data->host_addrlen;
+ if (copy_from_user(sap, data->host_addr, data->host_addrlen))
+ return -EFAULT;
+ if (!nfs_verify_server_address(sap))
+ goto out_no_address;
+ args->nfs_server.port = ntohs(((struct sockaddr_in *)sap)->sin_port);
+
+ if (data->auth_flavourlen) {
+ rpc_authflavor_t pseudoflavor;
+ if (data->auth_flavourlen > 1)
+ goto out_inval_auth;
+ if (copy_from_user(&pseudoflavor,
+ data->auth_flavours,
+ sizeof(pseudoflavor)))
+ return -EFAULT;
+ args->selected_flavor = pseudoflavor;
+ } else
+ args->selected_flavor = RPC_AUTH_UNIX;
+
+ c = strndup_user(data->hostname.data, NFS4_MAXNAMLEN);
+ if (IS_ERR(c))
+ return PTR_ERR(c);
+ args->nfs_server.hostname = c;
+
+ c = strndup_user(data->mnt_path.data, NFS4_MAXPATHLEN);
+ if (IS_ERR(c))
+ return PTR_ERR(c);
+ args->nfs_server.export_path = c;
+ dfprintk(MOUNT, "NFS: MNTPATH: '%s'\n", c);
+
+ c = strndup_user(data->client_addr.data, 16);
+ if (IS_ERR(c))
+ return PTR_ERR(c);
+ args->client_address = c;
+
+ /*
+ * Translate to nfs_parsed_mount_data, which nfs4_fill_super
+ * can deal with.
+ */
+
+ args->flags = data->flags & NFS4_MOUNT_FLAGMASK;
+ args->rsize = data->rsize;
+ args->wsize = data->wsize;
+ args->timeo = data->timeo;
+ args->retrans = data->retrans;
+ args->acregmin = data->acregmin;
+ args->acregmax = data->acregmax;
+ args->acdirmin = data->acdirmin;
+ args->acdirmax = data->acdirmax;
+ args->nfs_server.protocol = data->proto;
+ nfs_validate_transport_protocol(args);
+ if (args->nfs_server.protocol == XPRT_TRANSPORT_UDP)
+ goto out_invalid_transport_udp;
+
+ break;
+ default:
+ return NFS_TEXT_DATA;
+ }
+
+ return 0;
+
+out_no_data:
+ dfprintk(MOUNT, "NFS4: mount program didn't pass any mount data\n");
+ return -EINVAL;
+
+out_inval_auth:
+ dfprintk(MOUNT, "NFS4: Invalid number of RPC auth flavours %d\n",
+ data->auth_flavourlen);
+ return -EINVAL;
+
+out_no_address:
+ dfprintk(MOUNT, "NFS4: mount program didn't pass remote address\n");
+ return -EINVAL;
+
+out_invalid_transport_udp:
+ dfprintk(MOUNT, "NFSv4: Unsupported transport protocol udp\n");
+ return -EINVAL;
+}
+
+int nfs_validate_mount_data(struct file_system_type *fs_type,
+ void *options,
+ struct nfs_parsed_mount_data *args,
+ struct nfs_fh *mntfh,
+ const char *dev_name)
+{
+ if (fs_type == &nfs_fs_type)
+ return nfs23_validate_mount_data(options, args, mntfh, dev_name);
+ return nfs4_validate_mount_data(options, args, dev_name);
+}
+#else
+int nfs_validate_mount_data(struct file_system_type *fs_type,
+ void *options,
+ struct nfs_parsed_mount_data *args,
+ struct nfs_fh *mntfh,
+ const char *dev_name)
+{
+ return nfs23_validate_mount_data(options, args, mntfh, dev_name);
+}
+#endif
+
+int nfs_validate_text_mount_data(void *options,
+ struct nfs_parsed_mount_data *args,
+ const char *dev_name)
+{
+ int port = 0;
+ int max_namelen = PAGE_SIZE;
+ int max_pathlen = NFS_MAXPATHLEN;
+ struct sockaddr *sap = (struct sockaddr *)&args->nfs_server.address;
+
+ if (nfs_parse_mount_options((char *)options, args) == 0)
+ return -EINVAL;
+
+ if (!nfs_verify_server_address(sap))
+ goto out_no_address;
+
+ if (args->version == 4) {
+#if IS_ENABLED(CONFIG_NFS_V4)
+ if (args->nfs_server.protocol == XPRT_TRANSPORT_RDMA)
+ port = NFS_RDMA_PORT;
+ else
+ port = NFS_PORT;
+ max_namelen = NFS4_MAXNAMLEN;
+ max_pathlen = NFS4_MAXPATHLEN;
+ nfs_validate_transport_protocol(args);
+ if (args->nfs_server.protocol == XPRT_TRANSPORT_UDP)
+ goto out_invalid_transport_udp;
+ nfs4_validate_mount_flags(args);
+#else
+ goto out_v4_not_compiled;
+#endif /* CONFIG_NFS_V4 */
+ } else {
+ nfs_set_mount_transport_protocol(args);
+ if (args->nfs_server.protocol == XPRT_TRANSPORT_RDMA)
+ port = NFS_RDMA_PORT;
+ }
+
+ nfs_set_port(sap, &args->nfs_server.port, port);
+
+ return nfs_parse_devname(dev_name,
+ &args->nfs_server.hostname,
+ max_namelen,
+ &args->nfs_server.export_path,
+ max_pathlen);
+
+#if !IS_ENABLED(CONFIG_NFS_V4)
+out_v4_not_compiled:
+ dfprintk(MOUNT, "NFS: NFSv4 is not compiled into kernel\n");
+ return -EPROTONOSUPPORT;
+#else
+out_invalid_transport_udp:
+ dfprintk(MOUNT, "NFSv4: Unsupported transport protocol udp\n");
+ return -EINVAL;
+#endif /* !CONFIG_NFS_V4 */
+
+out_no_address:
+ dfprintk(MOUNT, "NFS: mount program didn't pass remote address\n");
+ return -EINVAL;
+}
diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h
index d512ec394559..b66fd35993b3 100644
--- a/fs/nfs/internal.h
+++ b/fs/nfs/internal.h
@@ -7,6 +7,7 @@
#include <linux/mount.h>
#include <linux/security.h>
#include <linux/crc32.h>
+#include <linux/sunrpc/addr.h>
#include <linux/nfs_page.h>
#include <linux/wait_bit.h>

@@ -232,6 +233,22 @@ extern const struct svc_version nfs4_callback_version1;
extern const struct svc_version nfs4_callback_version4;

struct nfs_pageio_descriptor;
+
+/* mount.c */
+#define NFS_TEXT_DATA 1
+
+extern struct nfs_parsed_mount_data *nfs_alloc_parsed_mount_data(void);
+extern void nfs_free_parsed_mount_data(struct nfs_parsed_mount_data *data);
+extern int nfs_parse_mount_options(char *raw, struct nfs_parsed_mount_data *mnt);
+extern int nfs_validate_mount_data(struct file_system_type *fs_type,
+ void *options,
+ struct nfs_parsed_mount_data *args,
+ struct nfs_fh *mntfh,
+ const char *dev_name);
+extern int nfs_validate_text_mount_data(void *options,
+ struct nfs_parsed_mount_data *args,
+ const char *dev_name);
+
/* pagelist.c */
extern int __init nfs_init_nfspagecache(void);
extern void nfs_destroy_nfspagecache(void);
@@ -763,3 +780,15 @@ static inline bool nfs_error_is_fatal(int err)
}
}

+/*
+ * Select between a default port value and a user-specified port value.
+ * If a zero value is set, then autobind will be used.
+ */
+static inline void nfs_set_port(struct sockaddr *sap, int *port,
+ const unsigned short default_port)
+{
+ if (*port == NFS_UNSPEC_PORT)
+ *port = default_port;
+
+ rpc_set_port(sap, *port);
+}
diff --git a/fs/nfs/super.c b/fs/nfs/super.c
index d8702e57f7fc..886220d2da4e 100644
--- a/fs/nfs/super.c
+++ b/fs/nfs/super.c
@@ -69,229 +69,6 @@
#include "nfs.h"

#define NFSDBG_FACILITY NFSDBG_VFS
-#define NFS_TEXT_DATA 1
-
-#if IS_ENABLED(CONFIG_NFS_V3)
-#define NFS_DEFAULT_VERSION 3
-#else
-#define NFS_DEFAULT_VERSION 2
-#endif
-
-#define NFS_MAX_CONNECTIONS 16
-
-enum {
- /* Mount options that take no arguments */
- Opt_soft, Opt_softerr, Opt_hard,
- Opt_posix, Opt_noposix,
- Opt_cto, Opt_nocto,
- Opt_ac, Opt_noac,
- Opt_lock, Opt_nolock,
- Opt_udp, Opt_tcp, Opt_rdma,
- Opt_acl, Opt_noacl,
- Opt_rdirplus, Opt_nordirplus,
- Opt_sharecache, Opt_nosharecache,
- Opt_resvport, Opt_noresvport,
- Opt_fscache, Opt_nofscache,
- Opt_migration, Opt_nomigration,
-
- /* Mount options that take integer arguments */
- Opt_port,
- Opt_rsize, Opt_wsize, Opt_bsize,
- Opt_timeo, Opt_retrans,
- Opt_acregmin, Opt_acregmax,
- Opt_acdirmin, Opt_acdirmax,
- Opt_actimeo,
- Opt_namelen,
- Opt_mountport,
- Opt_mountvers,
- Opt_minorversion,
-
- /* Mount options that take string arguments */
- Opt_nfsvers,
- Opt_sec, Opt_proto, Opt_mountproto, Opt_mounthost,
- Opt_addr, Opt_mountaddr, Opt_clientaddr,
- Opt_nconnect,
- Opt_lookupcache,
- Opt_fscache_uniq,
- Opt_local_lock,
-
- /* Special mount options */
- Opt_userspace, Opt_deprecated, Opt_sloppy,
-
- Opt_err
-};
-
-static const match_table_t nfs_mount_option_tokens = {
- { Opt_userspace, "bg" },
- { Opt_userspace, "fg" },
- { Opt_userspace, "retry=%s" },
-
- { Opt_sloppy, "sloppy" },
-
- { Opt_soft, "soft" },
- { Opt_softerr, "softerr" },
- { Opt_hard, "hard" },
- { Opt_deprecated, "intr" },
- { Opt_deprecated, "nointr" },
- { Opt_posix, "posix" },
- { Opt_noposix, "noposix" },
- { Opt_cto, "cto" },
- { Opt_nocto, "nocto" },
- { Opt_ac, "ac" },
- { Opt_noac, "noac" },
- { Opt_lock, "lock" },
- { Opt_nolock, "nolock" },
- { Opt_udp, "udp" },
- { Opt_tcp, "tcp" },
- { Opt_rdma, "rdma" },
- { Opt_acl, "acl" },
- { Opt_noacl, "noacl" },
- { Opt_rdirplus, "rdirplus" },
- { Opt_nordirplus, "nordirplus" },
- { Opt_sharecache, "sharecache" },
- { Opt_nosharecache, "nosharecache" },
- { Opt_resvport, "resvport" },
- { Opt_noresvport, "noresvport" },
- { Opt_fscache, "fsc" },
- { Opt_nofscache, "nofsc" },
- { Opt_migration, "migration" },
- { Opt_nomigration, "nomigration" },
-
- { Opt_port, "port=%s" },
- { Opt_rsize, "rsize=%s" },
- { Opt_wsize, "wsize=%s" },
- { Opt_bsize, "bsize=%s" },
- { Opt_timeo, "timeo=%s" },
- { Opt_retrans, "retrans=%s" },
- { Opt_acregmin, "acregmin=%s" },
- { Opt_acregmax, "acregmax=%s" },
- { Opt_acdirmin, "acdirmin=%s" },
- { Opt_acdirmax, "acdirmax=%s" },
- { Opt_actimeo, "actimeo=%s" },
- { Opt_namelen, "namlen=%s" },
- { Opt_mountport, "mountport=%s" },
- { Opt_mountvers, "mountvers=%s" },
- { Opt_minorversion, "minorversion=%s" },
-
- { Opt_nfsvers, "nfsvers=%s" },
- { Opt_nfsvers, "vers=%s" },
-
- { Opt_sec, "sec=%s" },
- { Opt_proto, "proto=%s" },
- { Opt_mountproto, "mountproto=%s" },
- { Opt_addr, "addr=%s" },
- { Opt_clientaddr, "clientaddr=%s" },
- { Opt_mounthost, "mounthost=%s" },
- { Opt_mountaddr, "mountaddr=%s" },
-
- { Opt_nconnect, "nconnect=%s" },
-
- { Opt_lookupcache, "lookupcache=%s" },
- { Opt_fscache_uniq, "fsc=%s" },
- { Opt_local_lock, "local_lock=%s" },
-
- /* The following needs to be listed after all other options */
- { Opt_nfsvers, "v%s" },
-
- { Opt_err, NULL }
-};
-
-enum {
- Opt_xprt_udp, Opt_xprt_udp6, Opt_xprt_tcp, Opt_xprt_tcp6, Opt_xprt_rdma,
- Opt_xprt_rdma6,
-
- Opt_xprt_err
-};
-
-static const match_table_t nfs_xprt_protocol_tokens = {
- { Opt_xprt_udp, "udp" },
- { Opt_xprt_udp6, "udp6" },
- { Opt_xprt_tcp, "tcp" },
- { Opt_xprt_tcp6, "tcp6" },
- { Opt_xprt_rdma, "rdma" },
- { Opt_xprt_rdma6, "rdma6" },
-
- { Opt_xprt_err, NULL }
-};
-
-enum {
- Opt_sec_none, Opt_sec_sys,
- Opt_sec_krb5, Opt_sec_krb5i, Opt_sec_krb5p,
- Opt_sec_lkey, Opt_sec_lkeyi, Opt_sec_lkeyp,
- Opt_sec_spkm, Opt_sec_spkmi, Opt_sec_spkmp,
-
- Opt_sec_err
-};
-
-static const match_table_t nfs_secflavor_tokens = {
- { Opt_sec_none, "none" },
- { Opt_sec_none, "null" },
- { Opt_sec_sys, "sys" },
-
- { Opt_sec_krb5, "krb5" },
- { Opt_sec_krb5i, "krb5i" },
- { Opt_sec_krb5p, "krb5p" },
-
- { Opt_sec_lkey, "lkey" },
- { Opt_sec_lkeyi, "lkeyi" },
- { Opt_sec_lkeyp, "lkeyp" },
-
- { Opt_sec_spkm, "spkm3" },
- { Opt_sec_spkmi, "spkm3i" },
- { Opt_sec_spkmp, "spkm3p" },
-
- { Opt_sec_err, NULL }
-};
-
-enum {
- Opt_lookupcache_all, Opt_lookupcache_positive,
- Opt_lookupcache_none,
-
- Opt_lookupcache_err
-};
-
-static match_table_t nfs_lookupcache_tokens = {
- { Opt_lookupcache_all, "all" },
- { Opt_lookupcache_positive, "pos" },
- { Opt_lookupcache_positive, "positive" },
- { Opt_lookupcache_none, "none" },
-
- { Opt_lookupcache_err, NULL }
-};
-
-enum {
- Opt_local_lock_all, Opt_local_lock_flock, Opt_local_lock_posix,
- Opt_local_lock_none,
-
- Opt_local_lock_err
-};
-
-static match_table_t nfs_local_lock_tokens = {
- { Opt_local_lock_all, "all" },
- { Opt_local_lock_flock, "flock" },
- { Opt_local_lock_posix, "posix" },
- { Opt_local_lock_none, "none" },
-
- { Opt_local_lock_err, NULL }
-};
-
-enum {
- Opt_vers_2, Opt_vers_3, Opt_vers_4, Opt_vers_4_0,
- Opt_vers_4_1, Opt_vers_4_2,
-
- Opt_vers_err
-};
-
-static match_table_t nfs_vers_tokens = {
- { Opt_vers_2, "2" },
- { Opt_vers_3, "3" },
- { Opt_vers_4, "4" },
- { Opt_vers_4_0, "4.0" },
- { Opt_vers_4_1, "4.1" },
- { Opt_vers_4_2, "4.2" },
-
- { Opt_vers_err, NULL }
-};

static struct dentry *nfs_prepared_mount(struct file_system_type *fs_type,
int flags, const char *dev_name, void *raw_data);
@@ -332,10 +109,6 @@ const struct super_operations nfs_sops = {
EXPORT_SYMBOL_GPL(nfs_sops);

#if IS_ENABLED(CONFIG_NFS_V4)
-static void nfs4_validate_mount_flags(struct nfs_parsed_mount_data *);
-static int nfs4_validate_mount_data(void *options,
- struct nfs_parsed_mount_data *args, const char *dev_name);
-
struct file_system_type nfs4_fs_type = {
.owner = THIS_MODULE,
.name = "nfs4",
@@ -932,141 +705,6 @@ void nfs_umount_begin(struct super_block *sb)
}
EXPORT_SYMBOL_GPL(nfs_umount_begin);

-static struct nfs_parsed_mount_data *nfs_alloc_parsed_mount_data(void)
-{
- struct nfs_parsed_mount_data *data;
-
- data = kzalloc(sizeof(*data), GFP_KERNEL);
- if (data) {
- data->timeo = NFS_UNSPEC_TIMEO;
- data->retrans = NFS_UNSPEC_RETRANS;
- data->acregmin = NFS_DEF_ACREGMIN;
- data->acregmax = NFS_DEF_ACREGMAX;
- data->acdirmin = NFS_DEF_ACDIRMIN;
- data->acdirmax = NFS_DEF_ACDIRMAX;
- data->mount_server.port = NFS_UNSPEC_PORT;
- data->nfs_server.port = NFS_UNSPEC_PORT;
- data->nfs_server.protocol = XPRT_TRANSPORT_TCP;
- data->selected_flavor = RPC_AUTH_MAXFLAVOR;
- data->minorversion = 0;
- data->need_mount = true;
- data->net = current->nsproxy->net_ns;
- data->lsm_opts = NULL;
- }
- return data;
-}
-
-static void nfs_free_parsed_mount_data(struct nfs_parsed_mount_data *data)
-{
- if (data) {
- kfree(data->client_address);
- kfree(data->mount_server.hostname);
- kfree(data->nfs_server.export_path);
- kfree(data->nfs_server.hostname);
- kfree(data->fscache_uniq);
- security_free_mnt_opts(&data->lsm_opts);
- kfree(data);
- }
-}
-
-/*
- * Sanity-check a server address provided by the mount command.
- *
- * Address family must be initialized, and address must not be
- * the ANY address for that family.
- */
-static int nfs_verify_server_address(struct sockaddr *addr)
-{
- switch (addr->sa_family) {
- case AF_INET: {
- struct sockaddr_in *sa = (struct sockaddr_in *)addr;
- return sa->sin_addr.s_addr != htonl(INADDR_ANY);
- }
- case AF_INET6: {
- struct in6_addr *sa = &((struct sockaddr_in6 *)addr)->sin6_addr;
- return !ipv6_addr_any(sa);
- }
- }
-
- dfprintk(MOUNT, "NFS: Invalid IP address specified\n");
- return 0;
-}
-
-/*
- * Select between a default port value and a user-specified port value.
- * If a zero value is set, then autobind will be used.
- */
-static void nfs_set_port(struct sockaddr *sap, int *port,
- const unsigned short default_port)
-{
- if (*port == NFS_UNSPEC_PORT)
- *port = default_port;
-
- rpc_set_port(sap, *port);
-}
-
-/*
- * Sanity check the NFS transport protocol.
- *
- */
-static void nfs_validate_transport_protocol(struct nfs_parsed_mount_data *mnt)
-{
- switch (mnt->nfs_server.protocol) {
- case XPRT_TRANSPORT_UDP:
- case XPRT_TRANSPORT_TCP:
- case XPRT_TRANSPORT_RDMA:
- break;
- default:
- mnt->nfs_server.protocol = XPRT_TRANSPORT_TCP;
- }
-}
-
-/*
- * For text based NFSv2/v3 mounts, the mount protocol transport default
- * settings should depend upon the specified NFS transport.
- */
-static void nfs_set_mount_transport_protocol(struct nfs_parsed_mount_data *mnt)
-{
- nfs_validate_transport_protocol(mnt);
-
- if (mnt->mount_server.protocol == XPRT_TRANSPORT_UDP ||
- mnt->mount_server.protocol == XPRT_TRANSPORT_TCP)
- return;
- switch (mnt->nfs_server.protocol) {
- case XPRT_TRANSPORT_UDP:
- mnt->mount_server.protocol = XPRT_TRANSPORT_UDP;
- break;
- case XPRT_TRANSPORT_TCP:
- case XPRT_TRANSPORT_RDMA:
- mnt->mount_server.protocol = XPRT_TRANSPORT_TCP;
- }
-}
-
-/*
- * Add 'flavor' to 'auth_info' if not already present.
- * Returns true if 'flavor' ends up in the list, false otherwise
- */
-static bool nfs_auth_info_add(struct nfs_auth_info *auth_info,
- rpc_authflavor_t flavor)
-{
- unsigned int i;
- unsigned int max_flavor_len = ARRAY_SIZE(auth_info->flavors);
-
- /* make sure this flavor isn't already in the list */
- for (i = 0; i < auth_info->flavor_len; i++) {
- if (flavor == auth_info->flavors[i])
- return true;
- }
-
- if (auth_info->flavor_len + 1 >= max_flavor_len) {
- dfprintk(MOUNT, "NFS: too many sec= flavors\n");
- return false;
- }
-
- auth_info->flavors[auth_info->flavor_len++] = flavor;
- return true;
-}
-
/*
* Return true if 'match' is in auth_info or auth_info is empty.
* Return false otherwise.
@@ -1087,627 +725,6 @@ bool nfs_auth_info_match(const struct nfs_auth_info *auth_info,
}
EXPORT_SYMBOL_GPL(nfs_auth_info_match);

-/*
- * Parse the value of the 'sec=' option.
- */
-static int nfs_parse_security_flavors(char *value,
- struct nfs_parsed_mount_data *mnt)
-{
- substring_t args[MAX_OPT_ARGS];
- rpc_authflavor_t pseudoflavor;
- char *p;
-
- dfprintk(MOUNT, "NFS: parsing sec=%s option\n", value);
-
- while ((p = strsep(&value, ":")) != NULL) {
- switch (match_token(p, nfs_secflavor_tokens, args)) {
- case Opt_sec_none:
- pseudoflavor = RPC_AUTH_NULL;
- break;
- case Opt_sec_sys:
- pseudoflavor = RPC_AUTH_UNIX;
- break;
- case Opt_sec_krb5:
- pseudoflavor = RPC_AUTH_GSS_KRB5;
- break;
- case Opt_sec_krb5i:
- pseudoflavor = RPC_AUTH_GSS_KRB5I;
- break;
- case Opt_sec_krb5p:
- pseudoflavor = RPC_AUTH_GSS_KRB5P;
- break;
- case Opt_sec_lkey:
- pseudoflavor = RPC_AUTH_GSS_LKEY;
- break;
- case Opt_sec_lkeyi:
- pseudoflavor = RPC_AUTH_GSS_LKEYI;
- break;
- case Opt_sec_lkeyp:
- pseudoflavor = RPC_AUTH_GSS_LKEYP;
- break;
- case Opt_sec_spkm:
- pseudoflavor = RPC_AUTH_GSS_SPKM;
- break;
- case Opt_sec_spkmi:
- pseudoflavor = RPC_AUTH_GSS_SPKMI;
- break;
- case Opt_sec_spkmp:
- pseudoflavor = RPC_AUTH_GSS_SPKMP;
- break;
- default:
- dfprintk(MOUNT,
- "NFS: sec= option '%s' not recognized\n", p);
- return 0;
- }
-
- if (!nfs_auth_info_add(&mnt->auth_info, pseudoflavor))
- return 0;
- }
-
- return 1;
-}
-
-static int nfs_parse_version_string(char *string,
- struct nfs_parsed_mount_data *mnt,
- substring_t *args)
-{
- mnt->flags &= ~NFS_MOUNT_VER3;
- switch (match_token(string, nfs_vers_tokens, args)) {
- case Opt_vers_2:
- mnt->version = 2;
- break;
- case Opt_vers_3:
- mnt->flags |= NFS_MOUNT_VER3;
- mnt->version = 3;
- break;
- case Opt_vers_4:
- /* Backward compatibility option. In future,
- * the mount program should always supply
- * a NFSv4 minor version number.
- */
- mnt->version = 4;
- break;
- case Opt_vers_4_0:
- mnt->version = 4;
- mnt->minorversion = 0;
- break;
- case Opt_vers_4_1:
- mnt->version = 4;
- mnt->minorversion = 1;
- break;
- case Opt_vers_4_2:
- mnt->version = 4;
- mnt->minorversion = 2;
- break;
- default:
- return 0;
- }
- return 1;
-}
-
-static int nfs_get_option_str(substring_t args[], char **option)
-{
- kfree(*option);
- *option = match_strdup(args);
- return !*option;
-}
-
-static int nfs_get_option_ul(substring_t args[], unsigned long *option)
-{
- int rc;
- char *string;
-
- string = match_strdup(args);
- if (string == NULL)
- return -ENOMEM;
- rc = kstrtoul(string, 10, option);
- kfree(string);
-
- return rc;
-}
-
-static int nfs_get_option_ul_bound(substring_t args[], unsigned long *option,
- unsigned long l_bound, unsigned long u_bound)
-{
- int ret;
-
- ret = nfs_get_option_ul(args, option);
- if (ret != 0)
- return ret;
- if (*option < l_bound || *option > u_bound)
- return -ERANGE;
- return 0;
-}
-
-/*
- * Error-check and convert a string of mount options from user space into
- * a data structure. The whole mount string is processed; bad options are
- * skipped as they are encountered. If there were no errors, return 1;
- * otherwise return 0 (zero).
- */
-static int nfs_parse_mount_options(char *raw,
- struct nfs_parsed_mount_data *mnt)
-{
- char *p, *string;
- int rc, sloppy = 0, invalid_option = 0;
- unsigned short protofamily = AF_UNSPEC;
- unsigned short mountfamily = AF_UNSPEC;
-
- if (!raw) {
- dfprintk(MOUNT, "NFS: mount options string was NULL.\n");
- return 1;
- }
- dfprintk(MOUNT, "NFS: nfs mount opts='%s'\n", raw);
-
- rc = security_sb_eat_lsm_opts(raw, &mnt->lsm_opts);
- if (rc)
- goto out_security_failure;
-
- while ((p = strsep(&raw, ",")) != NULL) {
- substring_t args[MAX_OPT_ARGS];
- unsigned long option;
- int token;
-
- if (!*p)
- continue;
-
- dfprintk(MOUNT, "NFS: parsing nfs mount option '%s'\n", p);
-
- token = match_token(p, nfs_mount_option_tokens, args);
- switch (token) {
-
- /*
- * boolean options: foo/nofoo
- */
- case Opt_soft:
- mnt->flags |= NFS_MOUNT_SOFT;
- mnt->flags &= ~NFS_MOUNT_SOFTERR;
- break;
- case Opt_softerr:
- mnt->flags |= NFS_MOUNT_SOFTERR;
- mnt->flags &= ~NFS_MOUNT_SOFT;
- break;
- case Opt_hard:
- mnt->flags &= ~(NFS_MOUNT_SOFT|NFS_MOUNT_SOFTERR);
- break;
- case Opt_posix:
- mnt->flags |= NFS_MOUNT_POSIX;
- break;
- case Opt_noposix:
- mnt->flags &= ~NFS_MOUNT_POSIX;
- break;
- case Opt_cto:
- mnt->flags &= ~NFS_MOUNT_NOCTO;
- break;
- case Opt_nocto:
- mnt->flags |= NFS_MOUNT_NOCTO;
- break;
- case Opt_ac:
- mnt->flags &= ~NFS_MOUNT_NOAC;
- break;
- case Opt_noac:
- mnt->flags |= NFS_MOUNT_NOAC;
- break;
- case Opt_lock:
- mnt->flags &= ~NFS_MOUNT_NONLM;
- mnt->flags &= ~(NFS_MOUNT_LOCAL_FLOCK |
- NFS_MOUNT_LOCAL_FCNTL);
- break;
- case Opt_nolock:
- mnt->flags |= NFS_MOUNT_NONLM;
- mnt->flags |= (NFS_MOUNT_LOCAL_FLOCK |
- NFS_MOUNT_LOCAL_FCNTL);
- break;
- case Opt_udp:
- mnt->flags &= ~NFS_MOUNT_TCP;
- mnt->nfs_server.protocol = XPRT_TRANSPORT_UDP;
- break;
- case Opt_tcp:
- mnt->flags |= NFS_MOUNT_TCP;
- mnt->nfs_server.protocol = XPRT_TRANSPORT_TCP;
- break;
- case Opt_rdma:
- mnt->flags |= NFS_MOUNT_TCP; /* for side protocols */
- mnt->nfs_server.protocol = XPRT_TRANSPORT_RDMA;
- xprt_load_transport(p);
- break;
- case Opt_acl:
- mnt->flags &= ~NFS_MOUNT_NOACL;
- break;
- case Opt_noacl:
- mnt->flags |= NFS_MOUNT_NOACL;
- break;
- case Opt_rdirplus:
- mnt->flags &= ~NFS_MOUNT_NORDIRPLUS;
- break;
- case Opt_nordirplus:
- mnt->flags |= NFS_MOUNT_NORDIRPLUS;
- break;
- case Opt_sharecache:
- mnt->flags &= ~NFS_MOUNT_UNSHARED;
- break;
- case Opt_nosharecache:
- mnt->flags |= NFS_MOUNT_UNSHARED;
- break;
- case Opt_resvport:
- mnt->flags &= ~NFS_MOUNT_NORESVPORT;
- break;
- case Opt_noresvport:
- mnt->flags |= NFS_MOUNT_NORESVPORT;
- break;
- case Opt_fscache:
- mnt->options |= NFS_OPTION_FSCACHE;
- kfree(mnt->fscache_uniq);
- mnt->fscache_uniq = NULL;
- break;
- case Opt_nofscache:
- mnt->options &= ~NFS_OPTION_FSCACHE;
- kfree(mnt->fscache_uniq);
- mnt->fscache_uniq = NULL;
- break;
- case Opt_migration:
- mnt->options |= NFS_OPTION_MIGRATION;
- break;
- case Opt_nomigration:
- mnt->options &= ~NFS_OPTION_MIGRATION;
- break;
-
- /*
- * options that take numeric values
- */
- case Opt_port:
- if (nfs_get_option_ul(args, &option) ||
- option > USHRT_MAX)
- goto out_invalid_value;
- mnt->nfs_server.port = option;
- break;
- case Opt_rsize:
- if (nfs_get_option_ul(args, &option))
- goto out_invalid_value;
- mnt->rsize = option;
- break;
- case Opt_wsize:
- if (nfs_get_option_ul(args, &option))
- goto out_invalid_value;
- mnt->wsize = option;
- break;
- case Opt_bsize:
- if (nfs_get_option_ul(args, &option))
- goto out_invalid_value;
- mnt->bsize = option;
- break;
- case Opt_timeo:
- if (nfs_get_option_ul_bound(args, &option, 1, INT_MAX))
- goto out_invalid_value;
- mnt->timeo = option;
- break;
- case Opt_retrans:
- if (nfs_get_option_ul_bound(args, &option, 0, INT_MAX))
- goto out_invalid_value;
- mnt->retrans = option;
- break;
- case Opt_acregmin:
- if (nfs_get_option_ul(args, &option))
- goto out_invalid_value;
- mnt->acregmin = option;
- break;
- case Opt_acregmax:
- if (nfs_get_option_ul(args, &option))
- goto out_invalid_value;
- mnt->acregmax = option;
- break;
- case Opt_acdirmin:
- if (nfs_get_option_ul(args, &option))
- goto out_invalid_value;
- mnt->acdirmin = option;
- break;
- case Opt_acdirmax:
- if (nfs_get_option_ul(args, &option))
- goto out_invalid_value;
- mnt->acdirmax = option;
- break;
- case Opt_actimeo:
- if (nfs_get_option_ul(args, &option))
- goto out_invalid_value;
- mnt->acregmin = mnt->acregmax =
- mnt->acdirmin = mnt->acdirmax = option;
- break;
- case Opt_namelen:
- if (nfs_get_option_ul(args, &option))
- goto out_invalid_value;
- mnt->namlen = option;
- break;
- case Opt_mountport:
- if (nfs_get_option_ul(args, &option) ||
- option > USHRT_MAX)
- goto out_invalid_value;
- mnt->mount_server.port = option;
- break;
- case Opt_mountvers:
- if (nfs_get_option_ul(args, &option) ||
- option < NFS_MNT_VERSION ||
- option > NFS_MNT3_VERSION)
- goto out_invalid_value;
- mnt->mount_server.version = option;
- break;
- case Opt_minorversion:
- if (nfs_get_option_ul(args, &option))
- goto out_invalid_value;
- if (option > NFS4_MAX_MINOR_VERSION)
- goto out_invalid_value;
- mnt->minorversion = option;
- break;
-
- /*
- * options that take text values
- */
- case Opt_nfsvers:
- string = match_strdup(args);
- if (string == NULL)
- goto out_nomem;
- rc = nfs_parse_version_string(string, mnt, args);
- kfree(string);
- if (!rc)
- goto out_invalid_value;
- break;
- case Opt_sec:
- string = match_strdup(args);
- if (string == NULL)
- goto out_nomem;
- rc = nfs_parse_security_flavors(string, mnt);
- kfree(string);
- if (!rc) {
- dfprintk(MOUNT, "NFS: unrecognized "
- "security flavor\n");
- return 0;
- }
- break;
- case Opt_proto:
- string = match_strdup(args);
- if (string == NULL)
- goto out_nomem;
- token = match_token(string,
- nfs_xprt_protocol_tokens, args);
-
- protofamily = AF_INET;
- switch (token) {
- case Opt_xprt_udp6:
- protofamily = AF_INET6;
- /* fall through */
- case Opt_xprt_udp:
- mnt->flags &= ~NFS_MOUNT_TCP;
- mnt->nfs_server.protocol = XPRT_TRANSPORT_UDP;
- break;
- case Opt_xprt_tcp6:
- protofamily = AF_INET6;
- /* fall through */
- case Opt_xprt_tcp:
- mnt->flags |= NFS_MOUNT_TCP;
- mnt->nfs_server.protocol = XPRT_TRANSPORT_TCP;
- break;
- case Opt_xprt_rdma6:
- protofamily = AF_INET6;
- /* fall through */
- case Opt_xprt_rdma:
- /* vector side protocols to TCP */
- mnt->flags |= NFS_MOUNT_TCP;
- mnt->nfs_server.protocol = XPRT_TRANSPORT_RDMA;
- xprt_load_transport(string);
- break;
- default:
- dfprintk(MOUNT, "NFS: unrecognized "
- "transport protocol\n");
- kfree(string);
- return 0;
- }
- kfree(string);
- break;
- case Opt_mountproto:
- string = match_strdup(args);
- if (string == NULL)
- goto out_nomem;
- token = match_token(string,
- nfs_xprt_protocol_tokens, args);
- kfree(string);
-
- mountfamily = AF_INET;
- switch (token) {
- case Opt_xprt_udp6:
- mountfamily = AF_INET6;
- /* fall through */
- case Opt_xprt_udp:
- mnt->mount_server.protocol = XPRT_TRANSPORT_UDP;
- break;
- case Opt_xprt_tcp6:
- mountfamily = AF_INET6;
- /* fall through */
- case Opt_xprt_tcp:
- mnt->mount_server.protocol = XPRT_TRANSPORT_TCP;
- break;
- case Opt_xprt_rdma: /* not used for side protocols */
- default:
- dfprintk(MOUNT, "NFS: unrecognized "
- "transport protocol\n");
- return 0;
- }
- break;
- case Opt_addr:
- string = match_strdup(args);
- if (string == NULL)
- goto out_nomem;
- mnt->nfs_server.addrlen =
- rpc_pton(mnt->net, string, strlen(string),
- (struct sockaddr *)
- &mnt->nfs_server.address,
- sizeof(mnt->nfs_server.address));
- kfree(string);
- if (mnt->nfs_server.addrlen == 0)
- goto out_invalid_address;
- break;
- case Opt_clientaddr:
- if (nfs_get_option_str(args, &mnt->client_address))
- goto out_nomem;
- break;
- case Opt_mounthost:
- if (nfs_get_option_str(args,
- &mnt->mount_server.hostname))
- goto out_nomem;
- break;
- case Opt_mountaddr:
- string = match_strdup(args);
- if (string == NULL)
- goto out_nomem;
- mnt->mount_server.addrlen =
- rpc_pton(mnt->net, string, strlen(string),
- (struct sockaddr *)
- &mnt->mount_server.address,
- sizeof(mnt->mount_server.address));
- kfree(string);
- if (mnt->mount_server.addrlen == 0)
- goto out_invalid_address;
- break;
- case Opt_nconnect:
- if (nfs_get_option_ul_bound(args, &option, 1, NFS_MAX_CONNECTIONS))
- goto out_invalid_value;
- mnt->nfs_server.nconnect = option;
- break;
- case Opt_lookupcache:
- string = match_strdup(args);
- if (string == NULL)
- goto out_nomem;
- token = match_token(string,
- nfs_lookupcache_tokens, args);
- kfree(string);
- switch (token) {
- case Opt_lookupcache_all:
- mnt->flags &= ~(NFS_MOUNT_LOOKUP_CACHE_NONEG|NFS_MOUNT_LOOKUP_CACHE_NONE);
- break;
- case Opt_lookupcache_positive:
- mnt->flags &= ~NFS_MOUNT_LOOKUP_CACHE_NONE;
- mnt->flags |= NFS_MOUNT_LOOKUP_CACHE_NONEG;
- break;
- case Opt_lookupcache_none:
- mnt->flags |= NFS_MOUNT_LOOKUP_CACHE_NONEG|NFS_MOUNT_LOOKUP_CACHE_NONE;
- break;
- default:
- dfprintk(MOUNT, "NFS: invalid "
- "lookupcache argument\n");
- return 0;
- };
- break;
- case Opt_fscache_uniq:
- if (nfs_get_option_str(args, &mnt->fscache_uniq))
- goto out_nomem;
- mnt->options |= NFS_OPTION_FSCACHE;
- break;
- case Opt_local_lock:
- string = match_strdup(args);
- if (string == NULL)
- goto out_nomem;
- token = match_token(string, nfs_local_lock_tokens,
- args);
- kfree(string);
- switch (token) {
- case Opt_local_lock_all:
- mnt->flags |= (NFS_MOUNT_LOCAL_FLOCK |
- NFS_MOUNT_LOCAL_FCNTL);
- break;
- case Opt_local_lock_flock:
- mnt->flags |= NFS_MOUNT_LOCAL_FLOCK;
- break;
- case Opt_local_lock_posix:
- mnt->flags |= NFS_MOUNT_LOCAL_FCNTL;
- break;
- case Opt_local_lock_none:
- mnt->flags &= ~(NFS_MOUNT_LOCAL_FLOCK |
- NFS_MOUNT_LOCAL_FCNTL);
- break;
- default:
- dfprintk(MOUNT, "NFS: invalid "
- "local_lock argument\n");
- return 0;
- };
- break;
-
- /*
- * Special options
- */
- case Opt_sloppy:
- sloppy = 1;
- dfprintk(MOUNT, "NFS: relaxing parsing rules\n");
- break;
- case Opt_userspace:
- case Opt_deprecated:
- dfprintk(MOUNT, "NFS: ignoring mount option "
- "'%s'\n", p);
- break;
-
- default:
- invalid_option = 1;
- dfprintk(MOUNT, "NFS: unrecognized mount option "
- "'%s'\n", p);
- }
- }
-
- if (!sloppy && invalid_option)
- return 0;
-
- if (mnt->minorversion && mnt->version != 4)
- goto out_minorversion_mismatch;
-
- if (mnt->options & NFS_OPTION_MIGRATION &&
- (mnt->version != 4 || mnt->minorversion != 0))
- goto out_migration_misuse;
-
- /*
- * verify that any proto=/mountproto= options match the address
- * families in the addr=/mountaddr= options.
- */
- if (protofamily != AF_UNSPEC &&
- protofamily != mnt->nfs_server.address.ss_family)
- goto out_proto_mismatch;
-
- if (mountfamily != AF_UNSPEC) {
- if (mnt->mount_server.addrlen) {
- if (mountfamily != mnt->mount_server.address.ss_family)
- goto out_mountproto_mismatch;
- } else {
- if (mountfamily != mnt->nfs_server.address.ss_family)
- goto out_mountproto_mismatch;
- }
- }
-
- return 1;
-
-out_mountproto_mismatch:
- printk(KERN_INFO "NFS: mount server address does not match mountproto= "
- "option\n");
- return 0;
-out_proto_mismatch:
- printk(KERN_INFO "NFS: server address does not match proto= option\n");
- return 0;
-out_invalid_address:
- printk(KERN_INFO "NFS: bad IP address specified: %s\n", p);
- return 0;
-out_invalid_value:
- printk(KERN_INFO "NFS: bad mount option value specified: %s\n", p);
- return 0;
-out_minorversion_mismatch:
- printk(KERN_INFO "NFS: mount option vers=%u does not support "
- "minorversion=%u\n", mnt->version, mnt->minorversion);
- return 0;
-out_migration_misuse:
- printk(KERN_INFO
- "NFS: 'migration' not supported for this NFS version\n");
- return 0;
-out_nomem:
- printk(KERN_INFO "NFS: not enough memory to parse option\n");
- return 0;
-out_security_failure:
- printk(KERN_INFO "NFS: security options invalid: %d\n", rc);
- return 0;
-}
-
/*
* Ensure that a specified authtype in args->auth_info is supported by
* the server. Returns 0 and sets args->selected_flavor if it's ok, and
@@ -1908,327 +925,6 @@ struct dentry *nfs_try_mount(int flags, const char *dev_name,
}
EXPORT_SYMBOL_GPL(nfs_try_mount);

-/*
- * Split "dev_name" into "hostname:export_path".
- *
- * The leftmost colon demarks the split between the server's hostname
- * and the export path. If the hostname starts with a left square
- * bracket, then it may contain colons.
- *
- * Note: caller frees hostname and export path, even on error.
- */
-static int nfs_parse_devname(const char *dev_name,
- char **hostname, size_t maxnamlen,
- char **export_path, size_t maxpathlen)
-{
- size_t len;
- char *end;
-
- if (unlikely(!dev_name || !*dev_name)) {
- dfprintk(MOUNT, "NFS: device name not specified\n");
- return -EINVAL;
- }
-
- /* Is the host name protected with square brakcets? */
- if (*dev_name == '[') {
- end = strchr(++dev_name, ']');
- if (end == NULL || end[1] != ':')
- goto out_bad_devname;
-
- len = end - dev_name;
- end++;
- } else {
- char *comma;
-
- end = strchr(dev_name, ':');
- if (end == NULL)
- goto out_bad_devname;
- len = end - dev_name;
-
- /* kill possible hostname list: not supported */
- comma = strchr(dev_name, ',');
- if (comma != NULL && comma < end)
- len = comma - dev_name;
- }
-
- if (len > maxnamlen)
- goto out_hostname;
-
- /* N.B. caller will free nfs_server.hostname in all cases */
- *hostname = kstrndup(dev_name, len, GFP_KERNEL);
- if (*hostname == NULL)
- goto out_nomem;
- len = strlen(++end);
- if (len > maxpathlen)
- goto out_path;
- *export_path = kstrndup(end, len, GFP_KERNEL);
- if (!*export_path)
- goto out_nomem;
-
- dfprintk(MOUNT, "NFS: MNTPATH: '%s'\n", *export_path);
- return 0;
-
-out_bad_devname:
- dfprintk(MOUNT, "NFS: device name not in host:path format\n");
- return -EINVAL;
-
-out_nomem:
- dfprintk(MOUNT, "NFS: not enough memory to parse device name\n");
- return -ENOMEM;
-
-out_hostname:
- dfprintk(MOUNT, "NFS: server hostname too long\n");
- return -ENAMETOOLONG;
-
-out_path:
- dfprintk(MOUNT, "NFS: export pathname too long\n");
- return -ENAMETOOLONG;
-}
-
-/*
- * Validate the NFS2/NFS3 mount data
- * - fills in the mount root filehandle
- *
- * For option strings, user space handles the following behaviors:
- *
- * + DNS: mapping server host name to IP address ("addr=" option)
- *
- * + failure mode: how to behave if a mount request can't be handled
- * immediately ("fg/bg" option)
- *
- * + retry: how often to retry a mount request ("retry=" option)
- *
- * + breaking back: trying proto=udp after proto=tcp, v2 after v3,
- * mountproto=tcp after mountproto=udp, and so on
- */
-static int nfs23_validate_mount_data(void *options,
- struct nfs_parsed_mount_data *args,
- struct nfs_fh *mntfh,
- const char *dev_name)
-{
- struct nfs_mount_data *data = (struct nfs_mount_data *)options;
- struct sockaddr *sap = (struct sockaddr *)&args->nfs_server.address;
- int extra_flags = NFS_MOUNT_LEGACY_INTERFACE;
-
- if (data == NULL)
- goto out_no_data;
-
- args->version = NFS_DEFAULT_VERSION;
- switch (data->version) {
- case 1:
- data->namlen = 0; /* fall through */
- case 2:
- data->bsize = 0; /* fall through */
- case 3:
- if (data->flags & NFS_MOUNT_VER3)
- goto out_no_v3;
- data->root.size = NFS2_FHSIZE;
- memcpy(data->root.data, data->old_root.data, NFS2_FHSIZE);
- /* Turn off security negotiation */
- extra_flags |= NFS_MOUNT_SECFLAVOUR;
- /* fall through */
- case 4:
- if (data->flags & NFS_MOUNT_SECFLAVOUR)
- goto out_no_sec;
- /* fall through */
- case 5:
- memset(data->context, 0, sizeof(data->context));
- /* fall through */
- case 6:
- if (data->flags & NFS_MOUNT_VER3) {
- if (data->root.size > NFS3_FHSIZE || data->root.size == 0)
- goto out_invalid_fh;
- mntfh->size = data->root.size;
- args->version = 3;
- } else {
- mntfh->size = NFS2_FHSIZE;
- args->version = 2;
- }
-
-
- memcpy(mntfh->data, data->root.data, mntfh->size);
- if (mntfh->size < sizeof(mntfh->data))
- memset(mntfh->data + mntfh->size, 0,
- sizeof(mntfh->data) - mntfh->size);
-
- /*
- * Translate to nfs_parsed_mount_data, which nfs_fill_super
- * can deal with.
- */
- args->flags = data->flags & NFS_MOUNT_FLAGMASK;
- args->flags |= extra_flags;
- args->rsize = data->rsize;
- args->wsize = data->wsize;
- args->timeo = data->timeo;
- args->retrans = data->retrans;
- args->acregmin = data->acregmin;
- args->acregmax = data->acregmax;
- args->acdirmin = data->acdirmin;
- args->acdirmax = data->acdirmax;
- args->need_mount = false;
-
- memcpy(sap, &data->addr, sizeof(data->addr));
- args->nfs_server.addrlen = sizeof(data->addr);
- args->nfs_server.port = ntohs(data->addr.sin_port);
- if (sap->sa_family != AF_INET ||
- !nfs_verify_server_address(sap))
- goto out_no_address;
-
- if (!(data->flags & NFS_MOUNT_TCP))
- args->nfs_server.protocol = XPRT_TRANSPORT_UDP;
- /* N.B. caller will free nfs_server.hostname in all cases */
- args->nfs_server.hostname = kstrdup(data->hostname, GFP_KERNEL);
- args->namlen = data->namlen;
- args->bsize = data->bsize;
-
- if (data->flags & NFS_MOUNT_SECFLAVOUR)
- args->selected_flavor = data->pseudoflavor;
- else
- args->selected_flavor = RPC_AUTH_UNIX;
- if (!args->nfs_server.hostname)
- goto out_nomem;
-
- if (!(data->flags & NFS_MOUNT_NONLM))
- args->flags &= ~(NFS_MOUNT_LOCAL_FLOCK|
- NFS_MOUNT_LOCAL_FCNTL);
- else
- args->flags |= (NFS_MOUNT_LOCAL_FLOCK|
- NFS_MOUNT_LOCAL_FCNTL);
- /*
- * The legacy version 6 binary mount data from userspace has a
- * field used only to transport selinux information into the
- * the kernel. To continue to support that functionality we
- * have a touch of selinux knowledge here in the NFS code. The
- * userspace code converted context=blah to just blah so we are
- * converting back to the full string selinux understands.
- */
- if (data->context[0]){
-#ifdef CONFIG_SECURITY_SELINUX
- int rc;
- data->context[NFS_MAX_CONTEXT_LEN] = '\0';
- rc = security_add_mnt_opt("context", data->context,
- strlen(data->context), &args->lsm_opts);
- if (rc)
- return rc;
-#else
- return -EINVAL;
-#endif
- }
-
- break;
- default:
- return NFS_TEXT_DATA;
- }
-
- return 0;
-
-out_no_data:
- dfprintk(MOUNT, "NFS: mount program didn't pass any mount data\n");
- return -EINVAL;
-
-out_no_v3:
- dfprintk(MOUNT, "NFS: nfs_mount_data version %d does not support v3\n",
- data->version);
- return -EINVAL;
-
-out_no_sec:
- dfprintk(MOUNT, "NFS: nfs_mount_data version supports only AUTH_SYS\n");
- return -EINVAL;
-
-out_nomem:
- dfprintk(MOUNT, "NFS: not enough memory to handle mount options\n");
- return -ENOMEM;
-
-out_no_address:
- dfprintk(MOUNT, "NFS: mount program didn't pass remote address\n");
- return -EINVAL;
-
-out_invalid_fh:
- dfprintk(MOUNT, "NFS: invalid root filehandle\n");
- return -EINVAL;
-}
-
-#if IS_ENABLED(CONFIG_NFS_V4)
-static int nfs_validate_mount_data(struct file_system_type *fs_type,
- void *options,
- struct nfs_parsed_mount_data *args,
- struct nfs_fh *mntfh,
- const char *dev_name)
-{
- if (fs_type == &nfs_fs_type)
- return nfs23_validate_mount_data(options, args, mntfh, dev_name);
- return nfs4_validate_mount_data(options, args, dev_name);
-}
-#else
-static int nfs_validate_mount_data(struct file_system_type *fs_type,
- void *options,
- struct nfs_parsed_mount_data *args,
- struct nfs_fh *mntfh,
- const char *dev_name)
-{
- return nfs23_validate_mount_data(options, args, mntfh, dev_name);
-}
-#endif
-
-static int nfs_validate_text_mount_data(void *options,
- struct nfs_parsed_mount_data *args,
- const char *dev_name)
-{
- int port = 0;
- int max_namelen = PAGE_SIZE;
- int max_pathlen = NFS_MAXPATHLEN;
- struct sockaddr *sap = (struct sockaddr *)&args->nfs_server.address;
-
- if (nfs_parse_mount_options((char *)options, args) == 0)
- return -EINVAL;
-
- if (!nfs_verify_server_address(sap))
- goto out_no_address;
-
- if (args->version == 4) {
-#if IS_ENABLED(CONFIG_NFS_V4)
- if (args->nfs_server.protocol == XPRT_TRANSPORT_RDMA)
- port = NFS_RDMA_PORT;
- else
- port = NFS_PORT;
- max_namelen = NFS4_MAXNAMLEN;
- max_pathlen = NFS4_MAXPATHLEN;
- nfs_validate_transport_protocol(args);
- if (args->nfs_server.protocol == XPRT_TRANSPORT_UDP)
- goto out_invalid_transport_udp;
- nfs4_validate_mount_flags(args);
-#else
- goto out_v4_not_compiled;
-#endif /* CONFIG_NFS_V4 */
- } else {
- nfs_set_mount_transport_protocol(args);
- if (args->nfs_server.protocol == XPRT_TRANSPORT_RDMA)
- port = NFS_RDMA_PORT;
- }
-
- nfs_set_port(sap, &args->nfs_server.port, port);
-
- return nfs_parse_devname(dev_name,
- &args->nfs_server.hostname,
- max_namelen,
- &args->nfs_server.export_path,
- max_pathlen);
-
-#if !IS_ENABLED(CONFIG_NFS_V4)
-out_v4_not_compiled:
- dfprintk(MOUNT, "NFS: NFSv4 is not compiled into kernel\n");
- return -EPROTONOSUPPORT;
-#else
-out_invalid_transport_udp:
- dfprintk(MOUNT, "NFSv4: Unsupported transport protocol udp\n");
- return -EINVAL;
-#endif /* !CONFIG_NFS_V4 */
-
-out_no_address:
- dfprintk(MOUNT, "NFS: mount program didn't pass remote address\n");
- return -EINVAL;
-}
-
#define NFS_REMOUNT_CMP_FLAGMASK ~(NFS_MOUNT_INTR \
| NFS_MOUNT_SECURE \
| NFS_MOUNT_TCP \
@@ -2719,113 +1415,6 @@ nfs_prepared_mount(struct file_system_type *fs_type, int flags,

#if IS_ENABLED(CONFIG_NFS_V4)

-static void nfs4_validate_mount_flags(struct nfs_parsed_mount_data *args)
-{
- args->flags &= ~(NFS_MOUNT_NONLM|NFS_MOUNT_NOACL|NFS_MOUNT_VER3|
- NFS_MOUNT_LOCAL_FLOCK|NFS_MOUNT_LOCAL_FCNTL);
-}
-
-/*
- * Validate NFSv4 mount options
- */
-static int nfs4_validate_mount_data(void *options,
- struct nfs_parsed_mount_data *args,
- const char *dev_name)
-{
- struct sockaddr *sap = (struct sockaddr *)&args->nfs_server.address;
- struct nfs4_mount_data *data = (struct nfs4_mount_data *)options;
- char *c;
-
- if (data == NULL)
- goto out_no_data;
-
- args->version = 4;
-
- switch (data->version) {
- case 1:
- if (data->host_addrlen > sizeof(args->nfs_server.address))
- goto out_no_address;
- if (data->host_addrlen == 0)
- goto out_no_address;
- args->nfs_server.addrlen = data->host_addrlen;
- if (copy_from_user(sap, data->host_addr, data->host_addrlen))
- return -EFAULT;
- if (!nfs_verify_server_address(sap))
- goto out_no_address;
- args->nfs_server.port = ntohs(((struct sockaddr_in *)sap)->sin_port);
-
- if (data->auth_flavourlen) {
- rpc_authflavor_t pseudoflavor;
- if (data->auth_flavourlen > 1)
- goto out_inval_auth;
- if (copy_from_user(&pseudoflavor,
- data->auth_flavours,
- sizeof(pseudoflavor)))
- return -EFAULT;
- args->selected_flavor = pseudoflavor;
- } else
- args->selected_flavor = RPC_AUTH_UNIX;
-
- c = strndup_user(data->hostname.data, NFS4_MAXNAMLEN);
- if (IS_ERR(c))
- return PTR_ERR(c);
- args->nfs_server.hostname = c;
-
- c = strndup_user(data->mnt_path.data, NFS4_MAXPATHLEN);
- if (IS_ERR(c))
- return PTR_ERR(c);
- args->nfs_server.export_path = c;
- dfprintk(MOUNT, "NFS: MNTPATH: '%s'\n", c);
-
- c = strndup_user(data->client_addr.data, 16);
- if (IS_ERR(c))
- return PTR_ERR(c);
- args->client_address = c;
-
- /*
- * Translate to nfs_parsed_mount_data, which nfs4_fill_super
- * can deal with.
- */
-
- args->flags = data->flags & NFS4_MOUNT_FLAGMASK;
- args->rsize = data->rsize;
- args->wsize = data->wsize;
- args->timeo = data->timeo;
- args->retrans = data->retrans;
- args->acregmin = data->acregmin;
- args->acregmax = data->acregmax;
- args->acdirmin = data->acdirmin;
- args->acdirmax = data->acdirmax;
- args->nfs_server.protocol = data->proto;
- nfs_validate_transport_protocol(args);
- if (args->nfs_server.protocol == XPRT_TRANSPORT_UDP)
- goto out_invalid_transport_udp;
-
- break;
- default:
- return NFS_TEXT_DATA;
- }
-
- return 0;
-
-out_no_data:
- dfprintk(MOUNT, "NFS4: mount program didn't pass any mount data\n");
- return -EINVAL;
-
-out_inval_auth:
- dfprintk(MOUNT, "NFS4: Invalid number of RPC auth flavours %d\n",
- data->auth_flavourlen);
- return -EINVAL;
-
-out_no_address:
- dfprintk(MOUNT, "NFS4: mount program didn't pass remote address\n");
- return -EINVAL;
-
-out_invalid_transport_udp:
- dfprintk(MOUNT, "NFSv4: Unsupported transport protocol udp\n");
- return -EINVAL;
-}
-
/*
* NFS v4 module parameters need to stay in the
* NFS client for backwards compatibility
--
2.17.2
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