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Subject[RFC 04/22] tcm: Add v4 base data structures and struct target_core_fabric_ops
Date
From: Nicholas Bellinger <nab@linux-iscsi.org>

This patch adds TCM Core v4 base data structures definitions + macros
and fabric module function pointer API in struct target_core_fabric_ops.

Signed-off-by: Nicholas A. Bellinger <nab@linux-iscsi.org>
---
include/target/target_core_base.h | 985 +++++++++++++++++++++++++++++++
include/target/target_core_fabric_ops.h | 89 +++
2 files changed, 1074 insertions(+), 0 deletions(-)
create mode 100644 include/target/target_core_base.h
create mode 100644 include/target/target_core_fabric_ops.h

diff --git a/include/target/target_core_base.h b/include/target/target_core_base.h
new file mode 100644
index 0000000..f4d0c70
--- /dev/null
+++ b/include/target/target_core_base.h
@@ -0,0 +1,985 @@
+#ifndef TARGET_CORE_BASE_H
+#define TARGET_CORE_BASE_H
+
+#include <linux/in.h>
+#include <linux/configfs.h>
+#include <net/sock.h>
+#include <net/tcp.h>
+#include "target_core_mib.h"
+
+#define TARGET_CORE_MOD_VERSION "v4.0.0-rc3"
+#define SHUTDOWN_SIGS (sigmask(SIGKILL)|sigmask(SIGINT)|sigmask(SIGABRT))
+
+/* SCSI Command Descriptor Block Size a la SCSI's MAX_COMMAND_SIZE */
+#define SCSI_CDB_SIZE 16
+#define TRANSPORT_IOV_DATA_BUFFER 5
+
+/* Maximum Number of LUNs per Target Portal Group */
+#define TRANSPORT_MAX_LUNS_PER_TPG 256
+
+/* From include/scsi/scsi_cmnd.h:SCSI_SENSE_BUFFERSIZE */
+#define TRANSPORT_SENSE_BUFFER SCSI_SENSE_BUFFERSIZE
+
+#define SPC_SENSE_KEY_OFFSET 2
+#define SPC_ASC_KEY_OFFSET 12
+#define SPC_ASCQ_KEY_OFFSET 13
+
+/* Currently same as ISCSI_IQN_LEN */
+#define TRANSPORT_IQN_LEN 224
+#define LU_GROUP_NAME_BUF 256
+#define TG_PT_GROUP_NAME_BUF 256
+/* Used to parse VPD into struct t10_vpd */
+#define VPD_TMP_BUF_SIZE 128
+/* Used for target_core-pscsi.c:pscsi_transport_complete() */
+#define VPD_BUF_LEN 256
+/* Used for struct se_subsystem_dev-->se_dev_alias, must be less than
+ PAGE_SIZE */
+#define SE_DEV_ALIAS_LEN 512
+/* Used for struct se_subsystem_dev->se_dev_udev_path[], must be less than
+ PAGE_SIZE */
+#define SE_UDEV_PATH_LEN 512
+/* Used for struct se_dev_snap_attrib->contact */
+#define SNAP_CONTACT_LEN 128
+/* Used for struct se_dev_snap_attrib->lv_group */
+#define SNAP_GROUP_LEN 128
+/* Used for struct se_dev_snap_attrib->lvc_size */
+#define SNAP_LVC_LEN 32
+/* Used by struct t10_reservation_template->pr_[i,t]_port[] */
+#define PR_APTPL_MAX_IPORT_LEN 256
+#define PR_APTPL_MAX_TPORT_LEN 256
+/* Used by struct t10_reservation_template->pr_aptpl_buf_len */
+#define PR_APTPL_BUF_LEN 8192
+/* Used by struct t10_alua_tg_pt_gp->tg_pt_gp_md_buf_len */
+#define ALUA_MD_BUF_LEN 1024
+/* Used by struct t10_pr_registration->pr_reg_isid */
+#define PR_REG_ISID_LEN 16
+/* PR_REG_ISID_LEN + ',i,0x' */
+#define PR_REG_ISID_ID_LEN (PR_REG_ISID_LEN + 5)
+
+/* used by PSCSI and iBlock Transport drivers */
+#define READ_BLOCK_LEN 6
+#define READ_CAP_LEN 8
+#define READ_POSITION_LEN 20
+#define INQUIRY_LEN 36
+#define INQUIRY_VPD_SERIAL_LEN 254
+#define INQUIRY_VPD_DEVICE_IDENTIFIER_LEN 254
+
+/* struct se_cmd->data_direction */
+#define SE_DIRECTION_NONE 0
+#define SE_DIRECTION_READ 1
+#define SE_DIRECTION_WRITE 2
+#define SE_DIRECTION_BIDI 3
+
+/* struct se_hba->hba_flags */
+#define HBA_FLAGS_INTERNAL_USE 0x00000001
+#define HBA_FLAGS_PSCSI_MODE 0x00000002
+
+/* struct se_hba->hba_status and iscsi_tpg_hba->thba_status */
+#define HBA_STATUS_FREE 0x00000001
+#define HBA_STATUS_ACTIVE 0x00000002
+#define HBA_STATUS_INACTIVE 0x00000004
+#define HBA_STATUS_SHUTDOWN 0x00000008
+
+/* struct se_lun->lun_status */
+#define TRANSPORT_LUN_STATUS_FREE 0
+#define TRANSPORT_LUN_STATUS_ACTIVE 1
+
+/* struct se_lun->lun_type */
+#define TRANSPORT_LUN_TYPE_NONE 0
+#define TRANSPORT_LUN_TYPE_DEVICE 1
+
+/* struct se_portal_group->se_tpg_type */
+#define TRANSPORT_TPG_TYPE_NORMAL 0
+#define TRANSPORT_TPG_TYPE_DISCOVERY 1
+
+/* Used for se_node_acl->nodeacl_flags */
+#define NAF_DYNAMIC_NODE_ACL 0x01
+
+/* struct se_map_sg->map_flags */
+#define MAP_SG_KMAP 0x01
+
+/* Used for generate timer flags */
+#define TF_RUNNING 0x01
+#define TF_STOP 0x02
+
+/* Special transport agnostic struct se_cmd->t_states */
+#define TRANSPORT_NO_STATE 240
+#define TRANSPORT_NEW_CMD 241
+#define TRANSPORT_DEFERRED_CMD 242
+#define TRANSPORT_WRITE_PENDING 243
+#define TRANSPORT_PROCESS_WRITE 244
+#define TRANSPORT_PROCESSING 245
+#define TRANSPORT_COMPLETE_OK 246
+#define TRANSPORT_COMPLETE_FAILURE 247
+#define TRANSPORT_COMPLETE_TIMEOUT 248
+#define TRANSPORT_PROCESS_TMR 249
+#define TRANSPORT_TMR_COMPLETE 250
+#define TRANSPORT_ISTATE_PROCESSING 251
+#define TRANSPORT_ISTATE_PROCESSED 252
+#define TRANSPORT_KILL 253
+#define TRANSPORT_REMOVE 254
+#define TRANSPORT_FREE 255
+
+#define SCF_SUPPORTED_SAM_OPCODE 0x00000001
+#define SCF_TRANSPORT_TASK_SENSE 0x00000002
+#define SCF_EMULATED_TASK_SENSE 0x00000004
+#define SCF_SCSI_DATA_SG_IO_CDB 0x00000008
+#define SCF_SCSI_CONTROL_SG_IO_CDB 0x00000010
+#define SCF_SCSI_CONTROL_NONSG_IO_CDB 0x00000020
+#define SCF_SCSI_NON_DATA_CDB 0x00000040
+#define SCF_SCSI_CDB_EXCEPTION 0x00000080
+#define SCF_SCSI_RESERVATION_CONFLICT 0x00000100
+#define SCF_CMD_PASSTHROUGH 0x00000200
+#define SCF_CMD_PASSTHROUGH_NOALLOC 0x00000400
+#define SCF_SE_CMD_FAILED 0x00000800
+#define SCF_SE_LUN_CMD 0x00001000
+#define SCF_SE_ALLOW_EOO 0x00002000
+#define SCF_SE_DISABLE_ONLINE_CHECK 0x00004000
+#define SCF_SENT_CHECK_CONDITION 0x00008000
+#define SCF_OVERFLOW_BIT 0x00010000
+#define SCF_UNDERFLOW_BIT 0x00020000
+#define SCF_SENT_DELAYED_TAS 0x00040000
+#define SCF_ALUA_NON_OPTIMIZED 0x00080000
+#define SCF_DELAYED_CMD_FROM_SAM_ATTR 0x00100000
+#define SCF_PASSTHROUGH_SG_TO_MEM 0x00200000
+#define SCF_PASSTHROUGH_CONTIG_TO_SG 0x00400000
+#define SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC 0x00800000
+#define SCF_EMULATE_SYNC_CACHE 0x01000000
+#define SCF_EMULATE_CDB_ASYNC 0x02000000
+
+/* struct se_device->type */
+#define PSCSI 1
+#define STGT 2
+#define PATA 3
+#define IBLOCK 4
+#define RAMDISK_DR 5
+#define RAMDISK_MCP 6
+#define FILEIO 7
+#define VROM 8
+#define VTAPE 9
+#define MEDIA_CHANGER 10
+
+/* struct se_dev_entry->lun_flags and struct se_lun->lun_access */
+#define TRANSPORT_LUNFLAGS_NO_ACCESS 0x00000000
+#define TRANSPORT_LUNFLAGS_INITIATOR_ACCESS 0x00000001
+#define TRANSPORT_LUNFLAGS_READ_ONLY 0x00000002
+#define TRANSPORT_LUNFLAGS_READ_WRITE 0x00000004
+
+/* struct se_device->dev_status */
+#define TRANSPORT_DEVICE_ACTIVATED 0x01
+#define TRANSPORT_DEVICE_DEACTIVATED 0x02
+#define TRANSPORT_DEVICE_QUEUE_FULL 0x04
+#define TRANSPORT_DEVICE_SHUTDOWN 0x08
+#define TRANSPORT_DEVICE_OFFLINE_ACTIVATED 0x10
+#define TRANSPORT_DEVICE_OFFLINE_DEACTIVATED 0x20
+
+#define DEV_STATUS_THR_TUR 1
+#define DEV_STATUS_THR_TAKE_ONLINE 2
+#define DEV_STATUS_THR_TAKE_OFFLINE 3
+#define DEV_STATUS_THR_SHUTDOWN 4
+
+/* struct se_dev_entry->deve_flags */
+#define DEF_PR_REGISTERED 0x01
+
+/* Used for struct t10_pr_registration->pr_reg_flags */
+#define PRF_ISID_PRESENT_AT_REG 0x01
+
+/* transport_send_check_condition_and_sense() */
+#define NON_EXISTENT_LUN 0x1
+#define UNSUPPORTED_SCSI_OPCODE 0x2
+#define INCORRECT_AMOUNT_OF_DATA 0x3
+#define UNEXPECTED_UNSOLICITED_DATA 0x4
+#define SERVICE_CRC_ERROR 0x5
+#define SNACK_REJECTED 0x6
+#define SECTOR_COUNT_TOO_MANY 0x7
+#define INVALID_CDB_FIELD 0x8
+#define INVALID_PARAMETER_LIST 0x9
+#define LOGICAL_UNIT_COMMUNICATION_FAILURE 0xa
+#define UNKNOWN_MODE_PAGE 0xb
+#define WRITE_PROTECTED 0xc
+#define CHECK_CONDITION_ABORT_CMD 0xd
+#define CHECK_CONDITION_UNIT_ATTENTION 0xe
+#define CHECK_CONDITION_NOT_READY 0xf
+
+struct se_obj {
+ atomic_t obj_access_count;
+} ____cacheline_aligned;
+
+typedef enum {
+ SPC_ALUA_PASSTHROUGH,
+ SPC2_ALUA_DISABLED,
+ SPC3_ALUA_EMULATED
+} t10_alua_index_t;
+
+typedef enum {
+ SAM_TASK_ATTR_PASSTHROUGH,
+ SAM_TASK_ATTR_UNTAGGED,
+ SAM_TASK_ATTR_EMULATED
+} t10_task_attr_index_t;
+
+struct se_cmd;
+
+struct t10_alua {
+ t10_alua_index_t alua_type;
+ /* ALUA Target Port Group ID */
+ u16 alua_tg_pt_gps_counter;
+ u32 alua_tg_pt_gps_count;
+ spinlock_t tg_pt_gps_lock;
+ struct se_subsystem_dev *t10_sub_dev;
+ /* Used for default ALUA Target Port Group */
+ struct t10_alua_tg_pt_gp *default_tg_pt_gp;
+ /* Used for default ALUA Target Port Group ConfigFS group */
+ struct config_group alua_tg_pt_gps_group;
+ int (*alua_state_check)(struct se_cmd *, unsigned char *, u8 *);
+ struct list_head tg_pt_gps_list;
+} ____cacheline_aligned;
+
+struct t10_alua_lu_gp {
+ u16 lu_gp_id;
+ int lu_gp_valid_id;
+ u32 lu_gp_members;
+ atomic_t lu_gp_shutdown;
+ atomic_t lu_gp_ref_cnt;
+ spinlock_t lu_gp_lock;
+ struct config_group lu_gp_group;
+ struct list_head lu_gp_list;
+ struct list_head lu_gp_mem_list;
+} ____cacheline_aligned;
+
+struct t10_alua_lu_gp_member {
+ int lu_gp_assoc;
+ atomic_t lu_gp_mem_ref_cnt;
+ spinlock_t lu_gp_mem_lock;
+ struct t10_alua_lu_gp *lu_gp;
+ struct se_device *lu_gp_mem_dev;
+ struct list_head lu_gp_mem_list;
+} ____cacheline_aligned;
+
+struct t10_alua_tg_pt_gp {
+ u16 tg_pt_gp_id;
+ int tg_pt_gp_valid_id;
+ int tg_pt_gp_alua_access_status;
+ int tg_pt_gp_alua_access_type;
+ int tg_pt_gp_nonop_delay_msecs;
+ int tg_pt_gp_trans_delay_msecs;
+ int tg_pt_gp_pref;
+ int tg_pt_gp_write_metadata;
+ u32 tg_pt_gp_md_buf_len;
+ u32 tg_pt_gp_members;
+ atomic_t tg_pt_gp_alua_access_state;
+ atomic_t tg_pt_gp_ref_cnt;
+ spinlock_t tg_pt_gp_lock;
+ struct mutex tg_pt_gp_md_mutex;
+ struct se_subsystem_dev *tg_pt_gp_su_dev;
+ struct config_group tg_pt_gp_group;
+ struct list_head tg_pt_gp_list;
+ struct list_head tg_pt_gp_mem_list;
+} ____cacheline_aligned;
+
+struct t10_alua_tg_pt_gp_member {
+ int tg_pt_gp_assoc;
+ atomic_t tg_pt_gp_mem_ref_cnt;
+ spinlock_t tg_pt_gp_mem_lock;
+ struct t10_alua_tg_pt_gp *tg_pt_gp;
+ struct se_port *tg_pt;
+ struct list_head tg_pt_gp_mem_list;
+} ____cacheline_aligned;
+
+struct t10_vpd {
+ unsigned char device_identifier[INQUIRY_VPD_DEVICE_IDENTIFIER_LEN];
+ int protocol_identifier_set;
+ u32 protocol_identifier;
+ u32 device_identifier_code_set;
+ u32 association;
+ u32 device_identifier_type;
+ struct list_head vpd_list;
+} ____cacheline_aligned;
+
+struct t10_wwn {
+ unsigned char vendor[8];
+ unsigned char model[16];
+ unsigned char revision[4];
+ unsigned char unit_serial[INQUIRY_VPD_SERIAL_LEN];
+ spinlock_t t10_vpd_lock;
+ struct se_subsystem_dev *t10_sub_dev;
+ struct config_group t10_wwn_group;
+ struct list_head t10_vpd_list;
+} ____cacheline_aligned;
+
+typedef enum {
+ SPC_PASSTHROUGH,
+ SPC2_RESERVATIONS,
+ SPC3_PERSISTENT_RESERVATIONS
+} t10_reservations_index_t;
+
+struct t10_pr_registration {
+ /* Used for fabrics that contain WWN+ISID */
+ char pr_reg_isid[PR_REG_ISID_LEN];
+ /* Used during APTPL metadata reading */
+ unsigned char pr_iport[PR_APTPL_MAX_IPORT_LEN];
+ /* Used during APTPL metadata reading */
+ unsigned char pr_tport[PR_APTPL_MAX_TPORT_LEN];
+ /* For writing out live meta data */
+ unsigned char *pr_aptpl_buf;
+ u16 pr_aptpl_rpti;
+ u16 pr_reg_tpgt;
+ /* Reservation effects all target ports */
+ int pr_reg_all_tg_pt;
+ /* Activate Persistence across Target Power Loss */
+ int pr_reg_aptpl;
+ int pr_res_holder;
+ int pr_res_type;
+ int pr_res_scope;
+ u32 pr_reg_flags;
+ u32 pr_res_mapped_lun;
+ u32 pr_aptpl_target_lun;
+ u32 pr_res_generation;
+ u64 pr_reg_bin_isid;
+ u64 pr_res_key;
+ atomic_t pr_res_holders;
+ struct se_node_acl *pr_reg_nacl;
+ struct se_dev_entry *pr_reg_deve;
+ struct se_lun *pr_reg_tg_pt_lun;
+ struct list_head pr_reg_list;
+ struct list_head pr_reg_abort_list;
+ struct list_head pr_reg_aptpl_list;
+ struct list_head pr_reg_atp_list;
+ struct list_head pr_reg_atp_mem_list;
+} ____cacheline_aligned;
+
+struct t10_reservation_template {
+ /* Reservation effects all target ports */
+ int pr_all_tg_pt;
+ /* Activate Persistence across Target Power Loss enabled
+ * for SCSI device */
+ int pr_aptpl_active;
+ u32 pr_aptpl_buf_len;
+ u32 pr_generation;
+ t10_reservations_index_t res_type;
+ spinlock_t registration_lock;
+ spinlock_t aptpl_reg_lock;
+ /* Reservation holder when pr_all_tg_pt=1 */
+ struct se_node_acl *pr_res_holder;
+ struct list_head registration_list;
+ struct list_head aptpl_reg_list;
+ int (*t10_reservation_check)(struct se_cmd *, u32 *);
+ int (*t10_seq_non_holder)(struct se_cmd *, unsigned char *, u32);
+ int (*t10_pr_register)(struct se_cmd *);
+ int (*t10_pr_clear)(struct se_cmd *);
+} ____cacheline_aligned;
+
+struct se_queue_req {
+ int state;
+ void *cmd;
+ struct list_head qr_list;
+} ____cacheline_aligned;
+
+struct se_queue_obj {
+ atomic_t queue_cnt;
+ spinlock_t cmd_queue_lock;
+ struct list_head qobj_list;
+ wait_queue_head_t thread_wq;
+ struct completion thread_create_comp;
+ struct completion thread_done_comp;
+} ____cacheline_aligned;
+
+struct se_transport_task {
+ unsigned char t_task_cdb[SCSI_CDB_SIZE];
+ unsigned long long t_task_lba;
+ int t_tasks_failed;
+ int t_task_fua;
+ u32 t_task_cdbs;
+ u32 t_task_check;
+ u32 t_task_no;
+ u32 t_task_sectors;
+ u32 t_task_se_num;
+ atomic_t t_fe_count;
+ atomic_t t_se_count;
+ atomic_t t_task_cdbs_left;
+ atomic_t t_task_cdbs_ex_left;
+ atomic_t t_task_cdbs_timeout_left;
+ atomic_t t_task_cdbs_sent;
+ atomic_t t_transport_aborted;
+ atomic_t t_transport_active;
+ atomic_t t_transport_complete;
+ atomic_t t_transport_queue_active;
+ atomic_t t_transport_sent;
+ atomic_t t_transport_stop;
+ atomic_t t_transport_timeout;
+ atomic_t transport_dev_active;
+ atomic_t transport_lun_active;
+ atomic_t transport_lun_fe_stop;
+ atomic_t transport_lun_stop;
+ spinlock_t t_state_lock;
+ struct completion t_transport_stop_comp;
+ struct completion t_transport_passthrough_comp;
+ struct completion t_transport_passthrough_wcomp;
+ struct completion transport_lun_fe_stop_comp;
+ struct completion transport_lun_stop_comp;
+ void *t_task_buf;
+ void *t_task_pt_buf;
+ struct list_head t_task_list;
+ struct list_head *t_mem_list;
+} ____cacheline_aligned;
+
+struct se_task {
+ unsigned char task_sense;
+ struct scatterlist *task_sg;
+ void *transport_req;
+ u8 task_scsi_status;
+ u8 task_flags;
+ int task_error_status;
+ int task_state_flags;
+ unsigned long long task_lba;
+ u32 task_no;
+ u32 task_sectors;
+ u32 task_size;
+ u32 task_sg_num;
+ u32 task_sg_offset;
+ struct se_cmd *task_se_cmd;
+ struct se_device *se_dev;
+ struct completion task_stop_comp;
+ atomic_t task_active;
+ atomic_t task_execute_queue;
+ atomic_t task_timeout;
+ atomic_t task_sent;
+ atomic_t task_stop;
+ atomic_t task_state_active;
+ struct timer_list task_timer;
+ int (*transport_map_task)(struct se_task *, u32);
+ struct se_device *se_obj_ptr;
+ struct list_head t_list;
+ struct list_head t_execute_list;
+ struct list_head t_state_list;
+} ____cacheline_aligned;
+
+#define TASK_CMD(task) ((struct se_cmd *)task->task_se_cmd)
+#define TASK_DEV(task) ((struct se_device *)task->se_dev)
+
+struct se_transform_info {
+ int ti_set_counts;
+ u32 ti_data_length;
+ unsigned long long ti_lba;
+ struct se_cmd *ti_se_cmd;
+ struct se_device *ti_dev;
+ struct se_device *se_obj_ptr;
+ struct se_device *ti_obj_ptr;
+} ____cacheline_aligned;
+
+struct se_offset_map {
+ int map_reset;
+ u32 iovec_length;
+ u32 iscsi_offset;
+ u32 current_offset;
+ u32 orig_offset;
+ u32 sg_count;
+ u32 sg_current;
+ u32 sg_length;
+ struct page *sg_page;
+ struct se_mem *map_se_mem;
+ struct se_mem *map_orig_se_mem;
+ void *iovec_base;
+} ____cacheline_aligned;
+
+struct se_map_sg {
+ int map_flags;
+ u32 data_length;
+ u32 data_offset;
+ void *fabric_cmd;
+ struct se_cmd *se_cmd;
+ struct iovec *iov;
+} ____cacheline_aligned;
+
+struct se_unmap_sg {
+ u32 data_length;
+ u32 sg_count;
+ u32 sg_offset;
+ u32 padding;
+ u32 t_offset;
+ void *fabric_cmd;
+ struct se_cmd *se_cmd;
+ struct se_offset_map lmap;
+ struct se_mem *cur_se_mem;
+} ____cacheline_aligned;
+
+struct se_cmd {
+ /* SAM response code being sent to initiator */
+ u8 scsi_status;
+ u8 scsi_asc;
+ u8 scsi_ascq;
+ u8 scsi_sense_reason;
+ u16 scsi_sense_length;
+ /* Delay for ALUA Active/NonOptimized state access in milliseconds */
+ int alua_nonop_delay;
+ int data_direction;
+ /* For SAM Task Attribute */
+ int sam_task_attr;
+ /* Transport protocol dependent state */
+ int t_state;
+ /* Transport protocol dependent state for out of order CmdSNs */
+ int deferred_t_state;
+ /* Transport specific error status */
+ int transport_error_status;
+ u32 se_cmd_flags;
+ u32 se_ordered_id;
+ /* Total size in bytes associated with command */
+ u32 data_length;
+ /* SCSI Presented Data Transfer Length */
+ u32 cmd_spdtl;
+ u32 residual_count;
+ u32 orig_fe_lun;
+ /* Number of iovecs iovecs used for IP stack calls */
+ u32 iov_data_count;
+ /* Number of iovecs allocated for iscsi_cmd_t->iov_data */
+ u32 orig_iov_data_count;
+ /* Persistent Reservation key */
+ u64 pr_res_key;
+ atomic_t transport_sent;
+ /* Used for sense data */
+ void *sense_buffer;
+ /* Used with sockets based fabric plugins */
+ struct iovec *iov_data;
+ struct list_head se_delayed_list;
+ struct list_head se_ordered_list;
+ struct list_head se_lun_list;
+ struct se_device *se_dev;
+ struct se_dev_entry *se_deve;
+ struct se_device *se_obj_ptr;
+ struct se_device *se_orig_obj_ptr;
+ struct se_lun *se_lun;
+ void *se_fabric_cmd_ptr;
+ struct se_session *se_sess;
+ struct se_tmr_req *se_tmr_req;
+ struct se_transport_task *t_task;
+ struct target_core_fabric_ops *se_tfo;
+ int (*transport_add_cmd_to_queue)(struct se_cmd *, u8);
+ int (*transport_allocate_resources)(struct se_cmd *, u32, u32);
+ int (*transport_cdb_transform)(struct se_cmd *,
+ struct se_transform_info *);
+ int (*transport_do_transform)(struct se_cmd *,
+ struct se_transform_info *);
+ int (*transport_emulate_cdb)(struct se_cmd *);
+ void (*transport_free_resources)(struct se_cmd *);
+ u32 (*transport_get_lba)(unsigned char *);
+ unsigned long long (*transport_get_long_lba)(unsigned char *);
+ struct se_task *(*transport_get_task)(struct se_transform_info *,
+ struct se_cmd *, void *);
+ int (*transport_map_buffers_to_tasks)(struct se_cmd *);
+ void (*transport_map_SG_segments)(struct se_unmap_sg *);
+ void (*transport_passthrough_done)(struct se_cmd *);
+ void (*transport_unmap_SG_segments)(struct se_unmap_sg *);
+ int (*transport_set_iovec_ptrs)(struct se_map_sg *,
+ struct se_unmap_sg *);
+ void (*transport_split_cdb)(unsigned long long, u32 *, unsigned char *);
+ void (*transport_wait_for_tasks)(struct se_cmd *, int, int);
+ void (*callback)(struct se_cmd *cmd, void *callback_arg,
+ int complete_status);
+ void *callback_arg;
+} ____cacheline_aligned;
+
+#define T_TASK(cmd) ((struct se_transport_task *)(cmd->t_task))
+#define CMD_TFO(cmd) ((struct target_core_fabric_ops *)cmd->se_tfo)
+
+struct se_tmr_req {
+ /* Task Management function to be preformed */
+ u8 function;
+ /* Task Management response to send */
+ u8 response;
+ int call_transport;
+ /* Reference to ITT that Task Mgmt should be preformed */
+ u32 ref_task_tag;
+ /* 64-bit encoded SAM LUN from $FABRIC_MOD TMR header */
+ u64 ref_task_lun;
+ void *fabric_tmr_ptr;
+ struct se_cmd *task_cmd;
+ struct se_cmd *ref_cmd;
+ struct se_device *tmr_dev;
+ struct se_lun *tmr_lun;
+ struct list_head tmr_list;
+} ____cacheline_aligned;
+
+struct se_ua {
+ u8 ua_asc;
+ u8 ua_ascq;
+ struct se_node_acl *ua_nacl;
+ struct list_head ua_dev_list;
+ struct list_head ua_nacl_list;
+} ____cacheline_aligned;
+
+struct se_node_acl {
+ char initiatorname[TRANSPORT_IQN_LEN];
+ int nodeacl_flags;
+ u32 queue_depth;
+ u32 acl_index;
+ u64 num_cmds;
+ u64 read_bytes;
+ u64 write_bytes;
+ spinlock_t stats_lock;
+ /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
+ atomic_t acl_pr_ref_count;
+ struct se_dev_entry *device_list;
+ struct se_session *nacl_sess;
+ struct se_portal_group *se_tpg;
+ spinlock_t device_list_lock;
+ spinlock_t nacl_sess_lock;
+ struct config_group acl_group;
+ struct config_group acl_attrib_group;
+ struct config_group acl_auth_group;
+ struct config_group acl_param_group;
+ struct config_group *acl_default_groups[4];
+ struct list_head acl_list;
+ struct list_head acl_sess_list;
+} ____cacheline_aligned;
+
+struct se_session {
+ u64 sess_bin_isid;
+ struct se_node_acl *se_node_acl;
+ struct se_portal_group *se_tpg;
+ void *fabric_sess_ptr;
+ struct list_head sess_list;
+ struct list_head sess_acl_list;
+} ____cacheline_aligned;
+
+#define SE_SESS(cmd) ((struct se_session *)(cmd)->se_sess)
+#define SE_NODE_ACL(sess) ((struct se_node_acl *)(sess)->se_node_acl)
+
+struct se_device;
+struct se_transform_info;
+struct scatterlist;
+
+struct se_lun_acl {
+ char initiatorname[TRANSPORT_IQN_LEN];
+ u32 mapped_lun;
+ struct se_node_acl *se_lun_nacl;
+ struct se_lun *se_lun;
+ struct list_head lacl_list;
+ struct config_group se_lun_group;
+} ____cacheline_aligned;
+
+struct se_dev_entry {
+ u32 lun_flags;
+ u32 deve_cmds;
+ u32 deve_flags;
+ u32 mapped_lun;
+ u32 average_bytes;
+ u32 last_byte_count;
+ u32 total_cmds;
+ u32 total_bytes;
+ u64 pr_res_key;
+ u64 creation_time;
+ u32 attach_count;
+ u64 read_bytes;
+ u64 write_bytes;
+ atomic_t ua_count;
+ /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
+ atomic_t pr_ref_count;
+ struct se_lun_acl *se_lun_acl;
+ spinlock_t ua_lock;
+ struct se_lun *se_lun;
+ struct list_head alua_port_list;
+ struct list_head ua_list;
+} ____cacheline_aligned;
+
+struct se_dev_attrib {
+ int emulate_dpo;
+ int emulate_fua_write;
+ int emulate_fua_read;
+ int emulate_write_cache;
+ int emulate_ua_intlck_ctrl;
+ int emulate_tas;
+ int emulate_reservations;
+ int emulate_alua;
+ int enforce_pr_isids;
+ u32 hw_block_size;
+ u32 block_size;
+ u32 hw_max_sectors;
+ u32 max_sectors;
+ u32 hw_queue_depth;
+ u32 queue_depth;
+ u32 task_timeout;
+ struct se_subsystem_dev *da_sub_dev;
+ struct config_group da_group;
+} ____cacheline_aligned;
+
+struct se_dev_snap_attrib {
+ unsigned char contact[SNAP_CONTACT_LEN];
+ unsigned char lv_group[SNAP_GROUP_LEN];
+ /* in lvcreate --size shorthand */
+ unsigned char lvc_size[SNAP_LVC_LEN];
+ pid_t pid;
+ int enabled;
+ int permissions;
+ int max_snapshots;
+ int max_warn;
+ int check_interval;
+ int create_interval;
+ int usage;
+ int usage_warn;
+ int vgs_usage_warn;
+} ____cacheline_aligned;
+
+struct se_subsystem_dev {
+ unsigned char se_dev_alias[SE_DEV_ALIAS_LEN];
+ unsigned char se_dev_udev_path[SE_UDEV_PATH_LEN];
+ u32 su_dev_flags;
+ struct se_hba *se_dev_hba;
+ struct se_device *se_dev_ptr;
+ struct se_dev_attrib se_dev_attrib;
+ struct se_dev_snap_attrib se_snap_attrib;
+ /* T10 Asymmetric Logical Unit Assignment for Target Ports */
+ struct t10_alua t10_alua;
+ /* T10 Inquiry and VPD WWN Information */
+ struct t10_wwn t10_wwn;
+ /* T10 SPC-2 + SPC-3 Reservations */
+ struct t10_reservation_template t10_reservation;
+ spinlock_t se_dev_lock;
+ void *se_dev_su_ptr;
+ struct list_head g_se_dev_list;
+ struct config_group se_dev_group;
+ /* For T10 Reservations */
+ struct config_group se_dev_pr_group;
+ /* For userspace lvm utils */
+ struct config_group se_dev_snap_group;
+} ____cacheline_aligned;
+
+#define SE_DEV_SNAP(su_dev) (&(su_dev)->se_snap_attrib)
+#define T10_ALUA(su_dev) (&(su_dev)->t10_alua)
+#define T10_RES(su_dev) (&(su_dev)->t10_reservation)
+
+struct se_device {
+ /* Type of disk transport used for device */
+ u8 type;
+ /* Set to 1 if thread is NOT sleeping on thread_sem */
+ u8 thread_active;
+ u8 dev_status_timer_flags;
+ /* RELATIVE TARGET PORT IDENTIFER Counter */
+ u16 dev_rpti_counter;
+ /* Used for SAM Task Attribute ordering */
+ u32 dev_cur_ordered_id;
+ u32 dev_flags;
+ u32 dev_port_count;
+ u32 dev_status;
+ u32 dev_tcq_window_closed;
+ /* Physical device queue depth */
+ u32 queue_depth;
+ /* Used for SPC-2 reservations enforce of ISIDs */
+ u64 dev_res_bin_isid;
+ t10_task_attr_index_t dev_task_attr_type;
+ unsigned long long dev_sectors_total;
+ /* Pointer to transport specific device structure */
+ void *dev_ptr;
+ u32 dev_index;
+ u64 creation_time;
+ u32 num_resets;
+ u64 num_cmds;
+ u64 read_bytes;
+ u64 write_bytes;
+ spinlock_t stats_lock;
+ /* Active commands on this virtual SE device */
+ atomic_t active_cmds;
+ atomic_t simple_cmds;
+ atomic_t depth_left;
+ atomic_t dev_ordered_id;
+ atomic_t dev_tur_active;
+ atomic_t execute_tasks;
+ atomic_t dev_status_thr_count;
+ atomic_t dev_hoq_count;
+ atomic_t dev_ordered_sync;
+ struct se_obj dev_obj;
+ struct se_obj dev_access_obj;
+ struct se_obj dev_export_obj;
+ struct se_queue_obj *dev_queue_obj;
+ struct se_queue_obj *dev_status_queue_obj;
+ spinlock_t delayed_cmd_lock;
+ spinlock_t ordered_cmd_lock;
+ spinlock_t execute_task_lock;
+ spinlock_t state_task_lock;
+ spinlock_t dev_alua_lock;
+ spinlock_t dev_reservation_lock;
+ spinlock_t dev_state_lock;
+ spinlock_t dev_status_lock;
+ spinlock_t dev_status_thr_lock;
+ spinlock_t se_port_lock;
+ spinlock_t se_tmr_lock;
+ /* Used for legacy SPC-2 reservationsa */
+ struct se_node_acl *dev_reserved_node_acl;
+ /* Used for ALUA Logical Unit Group membership */
+ struct t10_alua_lu_gp_member *dev_alua_lu_gp_mem;
+ /* Used for SPC-3 Persistent Reservations */
+ struct t10_pr_registration *dev_pr_res_holder;
+ struct list_head dev_sep_list;
+ struct list_head dev_tmr_list;
+ struct timer_list dev_status_timer;
+ /* Pointer to descriptor for processing thread */
+ struct task_struct *process_thread;
+ pid_t process_thread_pid;
+ struct task_struct *dev_mgmt_thread;
+ int (*write_pending)(struct se_task *);
+ void (*dev_generate_cdb)(unsigned long long, u32 *,
+ unsigned char *, int);
+ struct list_head delayed_cmd_list;
+ struct list_head ordered_cmd_list;
+ struct list_head execute_task_list;
+ struct list_head state_task_list;
+ /* Pointer to associated SE HBA */
+ struct se_hba *se_hba;
+ struct se_subsystem_dev *se_sub_dev;
+ /* Pointer to template of function pointers for transport */
+ struct se_subsystem_api *transport;
+ /* Linked list for struct se_hba struct se_device list */
+ struct list_head dev_list;
+ /* Linked list for struct se_global->g_se_dev_list */
+ struct list_head g_se_dev_list;
+} ____cacheline_aligned;
+
+#define SE_DEV(cmd) ((struct se_device *)(cmd)->se_lun->lun_se_dev)
+#define SU_DEV(dev) ((struct se_subsystem_dev *)(dev)->se_sub_dev)
+#define ISCSI_DEV(cmd) SE_DEV(cmd)
+#define DEV_ATTRIB(dev) (&(dev)->se_sub_dev->se_dev_attrib)
+#define DEV_T10_WWN(dev) (&(dev)->se_sub_dev->t10_wwn)
+
+struct se_hba {
+ u16 hba_tpgt;
+ u32 hba_status;
+ u32 hba_id;
+ u32 hba_flags;
+ /* Virtual iSCSI devices attached. */
+ u32 dev_count;
+ u32 hba_index;
+ atomic_t dev_mib_access_count;
+ atomic_t load_balance_queue;
+ atomic_t left_queue_depth;
+ /* Maximum queue depth the HBA can handle. */
+ atomic_t max_queue_depth;
+ /* Pointer to transport specific host structure. */
+ void *hba_ptr;
+ /* Linked list for struct se_device */
+ struct list_head hba_dev_list;
+ struct list_head hba_list;
+ spinlock_t device_lock;
+ spinlock_t hba_queue_lock;
+ struct config_group hba_group;
+ struct mutex hba_access_mutex;
+ struct se_subsystem_api *transport;
+} ____cacheline_aligned;
+
+#define ISCSI_HBA(d) ((struct se_hba *)(d)->se_hba)
+/* Using SE_HBA() for new code */
+#define SE_HBA(d) ((struct se_hba *)(d)->se_hba)
+
+struct se_lun {
+ int lun_type;
+ int lun_status;
+ u32 lun_access;
+ u32 lun_flags;
+ u32 unpacked_lun;
+ atomic_t lun_acl_count;
+ spinlock_t lun_acl_lock;
+ spinlock_t lun_cmd_lock;
+ spinlock_t lun_sep_lock;
+ struct completion lun_shutdown_comp;
+ struct list_head lun_cmd_list;
+ struct list_head lun_acl_list;
+ struct se_device *lun_se_dev;
+ struct config_group lun_group;
+ struct se_port *lun_sep;
+} ____cacheline_aligned;
+
+#define SE_LUN(c) ((struct se_lun *)(c)->se_lun)
+#define ISCSI_LUN(c) SE_LUN(c)
+
+struct se_port {
+ /* RELATIVE TARGET PORT IDENTIFER */
+ u16 sep_rtpi;
+ int sep_tg_pt_secondary_stat;
+ int sep_tg_pt_secondary_write_md;
+ u32 sep_index;
+ struct scsi_port_stats sep_stats;
+ /* Used for ALUA Target Port Groups membership */
+ atomic_t sep_tg_pt_gp_active;
+ atomic_t sep_tg_pt_secondary_offline;
+ /* Used for PR ALL_TG_PT=1 */
+ atomic_t sep_tg_pt_ref_cnt;
+ spinlock_t sep_alua_lock;
+ struct mutex sep_tg_pt_md_mutex;
+ struct t10_alua_tg_pt_gp_member *sep_alua_tg_pt_gp_mem;
+ struct se_lun *sep_lun;
+ struct se_portal_group *sep_tpg;
+ struct list_head sep_alua_list;
+ struct list_head sep_list;
+} ____cacheline_aligned;
+
+struct se_tpg_np {
+ struct config_group tpg_np_group;
+} ____cacheline_aligned;
+
+struct se_portal_group {
+ /* Type of target portal group */
+ int se_tpg_type;
+ /* Number of ACLed Initiator Nodes for this TPG */
+ u32 num_node_acls;
+ /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
+ atomic_t tpg_pr_ref_count;
+ /* Spinlock for adding/removing ACLed Nodes */
+ spinlock_t acl_node_lock;
+ /* Spinlock for adding/removing sessions */
+ spinlock_t session_lock;
+ spinlock_t tpg_lun_lock;
+ /* Pointer to $FABRIC_MOD portal group */
+ void *se_tpg_fabric_ptr;
+ struct list_head se_tpg_list;
+ /* linked list for initiator ACL list */
+ struct list_head acl_node_list;
+ struct se_lun *tpg_lun_list;
+ struct se_lun tpg_virt_lun0;
+ /* List of TCM sessions assoicated wth this TPG */
+ struct list_head tpg_sess_list;
+ /* Pointer to $FABRIC_MOD dependent code */
+ struct target_core_fabric_ops *se_tpg_tfo;
+ struct se_wwn *se_tpg_wwn;
+ struct config_group tpg_group;
+ struct config_group *tpg_default_groups[6];
+ struct config_group tpg_lun_group;
+ struct config_group tpg_np_group;
+ struct config_group tpg_acl_group;
+ struct config_group tpg_attrib_group;
+ struct config_group tpg_param_group;
+} ____cacheline_aligned;
+
+#define TPG_TFO(se_tpg) ((struct target_core_fabric_ops *)(se_tpg)->se_tpg_tfo)
+
+struct se_wwn {
+ struct target_fabric_configfs *wwn_tf;
+ struct config_group wwn_group;
+} ____cacheline_aligned;
+
+struct se_global {
+ u16 alua_lu_gps_counter;
+ int g_sub_api_initialized;
+ u32 in_shutdown;
+ u32 alua_lu_gps_count;
+ u32 g_hba_id_counter;
+ struct config_group target_core_hbagroup;
+ struct config_group alua_group;
+ struct config_group alua_lu_gps_group;
+ struct list_head g_lu_gps_list;
+ struct list_head g_se_tpg_list;
+ struct list_head g_hba_list;
+ struct list_head g_se_dev_list;
+ struct list_head g_sub_api_list;
+ struct se_hba *g_lun0_hba;
+ struct se_subsystem_dev *g_lun0_su_dev;
+ struct se_device *g_lun0_dev;
+ struct t10_alua_lu_gp *default_lu_gp;
+ struct mutex g_sub_api_mutex;
+ spinlock_t g_device_lock;
+ spinlock_t hba_lock;
+ spinlock_t se_tpg_lock;
+ spinlock_t lu_gps_lock;
+ spinlock_t plugin_class_lock;
+#ifdef DEBUG_DEV
+ spinlock_t debug_dev_lock;
+#endif
+} ____cacheline_aligned;
+
+#endif /* TARGET_CORE_BASE_H */
diff --git a/include/target/target_core_fabric_ops.h b/include/target/target_core_fabric_ops.h
new file mode 100644
index 0000000..3bc7fd6
--- /dev/null
+++ b/include/target/target_core_fabric_ops.h
@@ -0,0 +1,89 @@
+/* Defined in target_core_configfs.h */
+struct target_fabric_configfs;
+
+struct target_core_fabric_ops {
+ struct configfs_subsystem *tf_subsys;
+ char *(*get_fabric_name)(void);
+ u8 (*get_fabric_proto_ident)(struct se_portal_group *);
+ char *(*tpg_get_wwn)(struct se_portal_group *);
+ u16 (*tpg_get_tag)(struct se_portal_group *);
+ u32 (*tpg_get_default_depth)(struct se_portal_group *);
+ u32 (*tpg_get_pr_transport_id)(struct se_portal_group *,
+ struct se_node_acl *,
+ struct t10_pr_registration *, int *,
+ unsigned char *);
+ u32 (*tpg_get_pr_transport_id_len)(struct se_portal_group *,
+ struct se_node_acl *,
+ struct t10_pr_registration *, int *);
+ char *(*tpg_parse_pr_out_transport_id)(struct se_portal_group *,
+ const char *, u32 *, char **);
+ int (*tpg_check_demo_mode)(struct se_portal_group *);
+ int (*tpg_check_demo_mode_cache)(struct se_portal_group *);
+ int (*tpg_check_demo_mode_write_protect)(struct se_portal_group *);
+ int (*tpg_check_prod_mode_write_protect)(struct se_portal_group *);
+ struct se_node_acl *(*tpg_alloc_fabric_acl)(
+ struct se_portal_group *);
+ void (*tpg_release_fabric_acl)(struct se_portal_group *,
+ struct se_node_acl *);
+ u32 (*tpg_get_inst_index)(struct se_portal_group *);
+ /*
+ * Optional function pointer for TCM fabric modules that use
+ * Linux/NET sockets to allocate struct iovec array to struct se_cmd
+ */
+ int (*alloc_cmd_iovecs)(struct se_cmd *);
+ /*
+ * Optional to release struct se_cmd and fabric dependent allocated
+ * I/O descriptor in transport_cmd_check_stop()
+ */
+ void (*check_stop_free)(struct se_cmd *);
+ void (*release_cmd_to_pool)(struct se_cmd *);
+ void (*release_cmd_direct)(struct se_cmd *);
+ int (*dev_del_lun)(struct se_portal_group *, u32);
+ /*
+ * Called with spin_lock_bh(struct se_portal_group->session_lock held.
+ */
+ int (*shutdown_session)(struct se_session *);
+ void (*close_session)(struct se_session *);
+ void (*stop_session)(struct se_session *, int, int);
+ void (*fall_back_to_erl0)(struct se_session *);
+ int (*sess_logged_in)(struct se_session *);
+ u32 (*sess_get_index)(struct se_session *);
+ /*
+ * Used only for SCSI fabrics that contain multi-value TransportIDs
+ * (like iSCSI). All other SCSI fabrics should set this to NULL.
+ */
+ u32 (*sess_get_initiator_sid)(struct se_session *,
+ unsigned char *, u32);
+ int (*write_pending)(struct se_cmd *);
+ int (*write_pending_status)(struct se_cmd *);
+ void (*set_default_node_attributes)(struct se_node_acl *);
+ u32 (*get_task_tag)(struct se_cmd *);
+ int (*get_cmd_state)(struct se_cmd *);
+ void (*new_cmd_failure)(struct se_cmd *);
+ int (*queue_data_in)(struct se_cmd *);
+ int (*queue_status)(struct se_cmd *);
+ int (*queue_tm_rsp)(struct se_cmd *);
+ u16 (*set_fabric_sense_len)(struct se_cmd *, u32);
+ u16 (*get_fabric_sense_len)(void);
+ int (*is_state_remove)(struct se_cmd *);
+ u64 (*pack_lun)(unsigned int);
+ /*
+ * fabric module calls for target_core_fabric_configfs.c
+ */
+ struct se_wwn *(*fabric_make_wwn)(struct target_fabric_configfs *,
+ struct config_group *, const char *);
+ void (*fabric_drop_wwn)(struct se_wwn *);
+ struct se_portal_group *(*fabric_make_tpg)(struct se_wwn *,
+ struct config_group *, const char *);
+ void (*fabric_drop_tpg)(struct se_portal_group *);
+ int (*fabric_post_link)(struct se_portal_group *,
+ struct se_lun *);
+ void (*fabric_pre_unlink)(struct se_portal_group *,
+ struct se_lun *);
+ struct se_tpg_np *(*fabric_make_np)(struct se_portal_group *,
+ struct config_group *, const char *);
+ void (*fabric_drop_np)(struct se_tpg_np *);
+ struct se_node_acl *(*fabric_make_nodeacl)(struct se_portal_group *,
+ struct config_group *, const char *);
+ void (*fabric_drop_nodeacl)(struct se_node_acl *);
+};
--
1.7.2.2


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