- 根目录:
- include
- target
- target_core_base.h
#ifndef TARGET_CORE_BASE_H
#define TARGET_CORE_BASE_H
#include <linux/in.h>
#include <linux/configfs.h>
#include <linux/dma-mapping.h>
#include <linux/blkdev.h>
#include <scsi/scsi_cmnd.h>
#include <net/sock.h>
#include <net/tcp.h>
#define TARGET_CORE_MOD_VERSION "v4.0.0-rc7-ml"
#define SHUTDOWN_SIGS (sigmask(SIGKILL)|sigmask(SIGINT)|sigmask(SIGABRT))
/* Used by transport_generic_allocate_iovecs() */
#define TRANSPORT_IOV_DATA_BUFFER 5
/* Maximum Number of LUNs per Target Portal Group */
#define TRANSPORT_MAX_LUNS_PER_TPG 256
/*
* By default we use 32-byte CDBs in TCM Core and subsystem plugin code.
*
* Note that both include/scsi/scsi_cmnd.h:MAX_COMMAND_SIZE and
* include/linux/blkdev.h:BLOCK_MAX_CDB as of v2.6.36-rc4 still use
* 16-byte CDBs by default and require an extra allocation for
* 32-byte CDBs to because of legacy issues.
*
* Within TCM Core there are no such legacy limitiations, so we go ahead
* use 32-byte CDBs by default and use include/scsi/scsi.h:scsi_command_size()
* within all TCM Core and subsystem plugin code.
*/
#define TCM_MAX_COMMAND_SIZE 32
/*
* From include/scsi/scsi_cmnd.h:SCSI_SENSE_BUFFERSIZE, currently
* defined 96, but the real limit is 252 (or 260 including the header)
*/
#define TRANSPORT_SENSE_BUFFER SCSI_SENSE_BUFFERSIZE
/* Used by transport_send_check_condition_and_sense() */
#define SPC_SENSE_KEY_OFFSET 2
#define SPC_ADD_SENSE_LEN_OFFSET 7
#define SPC_ASC_KEY_OFFSET 12
#define SPC_ASCQ_KEY_OFFSET 13
#define TRANSPORT_IQN_LEN 224
/* Used by target_core_store_alua_lu_gp() and target_core_alua_lu_gp_show_attr_members() */
#define LU_GROUP_NAME_BUF 256
/* Used by core_alua_store_tg_pt_gp_info() and target_core_alua_tg_pt_gp_show_attr_members() */
#define TG_PT_GROUP_NAME_BUF 256
/* Used to parse VPD into struct t10_vpd */
#define VPD_TMP_BUF_SIZE 128
/* Used by transport_generic_cmd_sequencer() */
#define READ_BLOCK_LEN 6
#define READ_CAP_LEN 8
#define READ_POSITION_LEN 20
#define INQUIRY_LEN 36
/* Used by transport_get_inquiry_vpd_serial() */
#define INQUIRY_VPD_SERIAL_LEN 254
/* Used by transport_get_inquiry_vpd_device_ident() */
#define INQUIRY_VPD_DEVICE_IDENTIFIER_LEN 254
/* struct se_hba->hba_flags */
enum hba_flags_table {
HBA_FLAGS_INTERNAL_USE = 0x01,
HBA_FLAGS_PSCSI_MODE = 0x02,
};
/* struct se_lun->lun_status */
enum transport_lun_status_table {
TRANSPORT_LUN_STATUS_FREE = 0,
TRANSPORT_LUN_STATUS_ACTIVE = 1,
};
/* struct se_portal_group->se_tpg_type */
enum transport_tpg_type_table {
TRANSPORT_TPG_TYPE_NORMAL = 0,
TRANSPORT_TPG_TYPE_DISCOVERY = 1,
};
/* Used for generate timer flags */
enum timer_flags_table {
TF_RUNNING = 0x01,
TF_STOP = 0x02,
};
/* Special transport agnostic struct se_cmd->t_states */
enum transport_state_table {
TRANSPORT_NO_STATE = 0,
TRANSPORT_NEW_CMD = 1,
TRANSPORT_DEFERRED_CMD = 2,
TRANSPORT_WRITE_PENDING = 3,
TRANSPORT_PROCESS_WRITE = 4,
TRANSPORT_PROCESSING = 5,
TRANSPORT_COMPLETE_OK = 6,
TRANSPORT_COMPLETE_FAILURE = 7,
TRANSPORT_COMPLETE_TIMEOUT = 8,
TRANSPORT_PROCESS_TMR = 9,
TRANSPORT_TMR_COMPLETE = 10,
TRANSPORT_ISTATE_PROCESSING = 11,
TRANSPORT_ISTATE_PROCESSED = 12,
TRANSPORT_KILL = 13,
TRANSPORT_REMOVE = 14,
TRANSPORT_FREE = 15,
TRANSPORT_NEW_CMD_MAP = 16,
TRANSPORT_FREE_CMD_INTR = 17,
};
/* Used for struct se_cmd->se_cmd_flags */
enum se_cmd_flags_table {
SCF_SUPPORTED_SAM_OPCODE = 0x00000001,
SCF_TRANSPORT_TASK_SENSE = 0x00000002,
SCF_EMULATED_TASK_SENSE = 0x00000004,
SCF_SCSI_DATA_SG_IO_CDB = 0x00000008,
SCF_SCSI_CONTROL_SG_IO_CDB = 0x00000010,
SCF_SCSI_CONTROL_NONSG_IO_CDB = 0x00000020,
SCF_SCSI_NON_DATA_CDB = 0x00000040,
SCF_SCSI_CDB_EXCEPTION = 0x00000080,
SCF_SCSI_RESERVATION_CONFLICT = 0x00000100,
SCF_CMD_PASSTHROUGH_NOALLOC = 0x00000200,
SCF_SE_CMD_FAILED = 0x00000400,
SCF_SE_LUN_CMD = 0x00000800,
SCF_SE_ALLOW_EOO = 0x00001000,
SCF_SE_DISABLE_ONLINE_CHECK = 0x00002000,
SCF_SENT_CHECK_CONDITION = 0x00004000,
SCF_OVERFLOW_BIT = 0x00008000,
SCF_UNDERFLOW_BIT = 0x00010000,
SCF_SENT_DELAYED_TAS = 0x00020000,
SCF_ALUA_NON_OPTIMIZED = 0x00040000,
SCF_DELAYED_CMD_FROM_SAM_ATTR = 0x00080000,
SCF_PASSTHROUGH_SG_TO_MEM = 0x00100000,
SCF_PASSTHROUGH_CONTIG_TO_SG = 0x00200000,
SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC = 0x00400000,
SCF_EMULATE_SYNC_CACHE = 0x00800000,
SCF_EMULATE_CDB_ASYNC = 0x01000000,
SCF_EMULATE_SYNC_UNMAP = 0x02000000
};
/* struct se_dev_entry->lun_flags and struct se_lun->lun_access */
enum transport_lunflags_table {
TRANSPORT_LUNFLAGS_NO_ACCESS = 0x00,
TRANSPORT_LUNFLAGS_INITIATOR_ACCESS = 0x01,
TRANSPORT_LUNFLAGS_READ_ONLY = 0x02,
TRANSPORT_LUNFLAGS_READ_WRITE = 0x04,
};
/* struct se_device->dev_status */
enum transport_device_status_table {
TRANSPORT_DEVICE_ACTIVATED = 0x01,
TRANSPORT_DEVICE_DEACTIVATED = 0x02,
TRANSPORT_DEVICE_QUEUE_FULL = 0x04,
TRANSPORT_DEVICE_SHUTDOWN = 0x08,
TRANSPORT_DEVICE_OFFLINE_ACTIVATED = 0x10,
TRANSPORT_DEVICE_OFFLINE_DEACTIVATED = 0x20,
};
/*
* Used by transport_send_check_condition_and_sense() and se_cmd->scsi_sense_reason
* to signal which ASC/ASCQ sense payload should be built.
*/
enum tcm_sense_reason_table {
TCM_NON_EXISTENT_LUN = 0x01,
TCM_UNSUPPORTED_SCSI_OPCODE = 0x02,
TCM_INCORRECT_AMOUNT_OF_DATA = 0x03,
TCM_UNEXPECTED_UNSOLICITED_DATA = 0x04,
TCM_SERVICE_CRC_ERROR = 0x05,
TCM_SNACK_REJECTED = 0x06,
TCM_SECTOR_COUNT_TOO_MANY = 0x07,
TCM_INVALID_CDB_FIELD = 0x08,
TCM_INVALID_PARAMETER_LIST = 0x09,
TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE = 0x0a,
TCM_UNKNOWN_MODE_PAGE = 0x0b,
TCM_WRITE_PROTECTED = 0x0c,
TCM_CHECK_CONDITION_ABORT_CMD = 0x0d,
TCM_CHECK_CONDITION_UNIT_ATTENTION = 0x0e,
TCM_CHECK_CONDITION_NOT_READY = 0x0f,
};
struct se_obj {
atomic_t obj_access_count;
} ____cacheline_aligned;
/*
* Used by TCM Core internally to signal if ALUA emulation is enabled or
* disabled, or running in with TCM/pSCSI passthrough mode
*/
typedef enum {
SPC_ALUA_PASSTHROUGH,
SPC2_ALUA_DISABLED,
SPC3_ALUA_EMULATED
} t10_alua_index_t;
/*
* Used by TCM Core internally to signal if SAM Task Attribute emulation
* is enabled or disabled, or running in with TCM/pSCSI passthrough mode
*/
typedef enum {
SAM_TASK_ATTR_PASSTHROUGH,
SAM_TASK_ATTR_UNTAGGED,
SAM_TASK_ATTR_EMULATED
} t10_task_attr_index_t;
/*
* Used for target SCSI statistics
*/
typedef enum {
SCSI_INST_INDEX,
SCSI_DEVICE_INDEX,
SCSI_AUTH_INTR_INDEX,
SCSI_INDEX_TYPE_MAX
} scsi_index_t;
struct scsi_index_table {
spinlock_t lock;
u32 scsi_mib_index[SCSI_INDEX_TYPE_MAX];
} ____cacheline_aligned;
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 {
bool 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;
/* Used by struct t10_alua_tg_pt_gp->tg_pt_gp_md_buf_len */
#define ALUA_MD_BUF_LEN 1024
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 {
bool 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;
/*
* Used by TCM Core internally to signal if >= SPC-3 persistent reservations
* emulation is enabled or disabled, or running in with TCM/pSCSI passthrough
* mode
*/
typedef enum {
SPC_PASSTHROUGH,
SPC2_RESERVATIONS,
SPC3_PERSISTENT_RESERVATIONS
} t10_reservations_index_t;
struct t10_pr_registration {
/* Used for fabrics that contain WWN+ISID */
#define PR_REG_ISID_LEN 16
/* PR_REG_ISID_LEN + ',i,0x' */
#define PR_REG_ISID_ID_LEN (PR_REG_ISID_LEN + 5)
char pr_reg_isid[PR_REG_ISID_LEN];
/* Used during APTPL metadata reading */
#define PR_APTPL_MAX_IPORT_LEN 256
unsigned char pr_iport[PR_APTPL_MAX_IPORT_LEN];
/* Used during APTPL metadata reading */
#define PR_APTPL_MAX_TPORT_LEN 256
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;
/* Used for fabric initiator WWPNs using a ISID */
bool isid_present_at_reg;
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;
/*
* This set of function pointer ops is set based upon SPC3_PERSISTENT_RESERVATIONS,
* SPC2_RESERVATIONS or SPC_PASSTHROUGH in drivers/target/target_core_pr.c:
* core_setup_reservations()
*/
struct t10_reservation_ops {
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 *);
};
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;
/* Used by struct t10_reservation_template->pr_aptpl_buf_len */
#define PR_APTPL_BUF_LEN 8192
u32 pr_aptpl_buf_len;
u32 pr_generation;
t10_reservations_index_t res_type;
spinlock_t registration_lock;
spinlock_t aptpl_reg_lock;
/*
* This will always be set by one individual I_T Nexus.
* However with all_tg_pt=1, other I_T Nexus from the
* same initiator can access PR reg/res info on a different
* target port.
*
* There is also the 'All Registrants' case, where there is
* a single *pr_res_holder of the reservation, but all
* registrations are considered reservation holders.
*/
struct se_node_acl *pr_res_holder;
struct list_head registration_list;
struct list_head aptpl_reg_list;
struct t10_reservation_ops pr_ops;
} ____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;
} ____cacheline_aligned;
/*
* Used one per struct se_cmd to hold all extra struct se_task
* metadata. This structure is setup and allocated in
* drivers/target/target_core_transport.c:__transport_alloc_se_cmd()
*/
struct se_transport_task {
unsigned char *t_task_cdb;
unsigned char __t_task_cdb[TCM_MAX_COMMAND_SIZE];
unsigned long long t_task_lba;
int t_tasks_failed;
int t_tasks_fua;
bool t_tasks_bidi;
u32 t_task_cdbs;
u32 t_tasks_check;
u32 t_tasks_no;
u32 t_tasks_sectors;
u32 t_tasks_se_num;
u32 t_tasks_se_bidi_num;
u32 t_tasks_sg_chained_no;
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 transport_lun_fe_stop_comp;
struct completion transport_lun_stop_comp;
struct scatterlist *t_tasks_sg_chained;
struct scatterlist t_tasks_sg_bounce;
void *t_task_buf;
/*
* Used for pre-registered fabric SGL passthrough WRITE and READ
* with the special SCF_PASSTHROUGH_CONTIG_TO_SG case for TCM_Loop
* and other HW target mode fabric modules.
*/
struct scatterlist *t_task_pt_sgl;
struct list_head *t_mem_list;
/* Used for BIDI READ */
struct list_head *t_mem_bidi_list;
struct list_head t_task_list;
} ____cacheline_aligned;
struct se_task {
unsigned char task_sense;
struct scatterlist *task_sg;
struct scatterlist *task_sg_bidi;
u8 task_scsi_status;
u8 task_flags;
int task_error_status;
int task_state_flags;
bool task_padded_sg;
unsigned long long task_lba;
u32 task_no;
u32 task_sectors;
u32 task_size;
u32 task_sg_num;
u32 task_sg_offset;
enum dma_data_direction task_data_direction;
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;
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) ((task)->task_se_cmd)
#define TASK_DEV(task) ((task)->se_dev)
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;
/* See include/linux/dma-mapping.h */
enum dma_data_direction data_direction;
/* For SAM Task Attribute */
int sam_task_attr;
/* Transport protocol dependent state, see transport_state_table */
enum transport_state_table t_state;
/* Transport protocol dependent state for out of order CmdSNs */
int deferred_t_state;
/* Transport specific error status */
int transport_error_status;
/* See se_cmd_flags_table */
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;
/* Persistent Reservation key */
u64 pr_res_key;
atomic_t transport_sent;
/* Used for sense data */
void *sense_buffer;
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;
/* Only used for internal passthrough and legacy TCM fabric modules */
struct se_session *se_sess;
struct se_tmr_req *se_tmr_req;
/* t_task is setup to t_task_backstore in transport_init_se_cmd() */
struct se_transport_task *t_task;
struct se_transport_task t_task_backstore;
struct target_core_fabric_ops *se_tfo;
int (*transport_emulate_cdb)(struct se_cmd *);
void (*transport_split_cdb)(unsigned long long, u32 *, unsigned char *);
void (*transport_wait_for_tasks)(struct se_cmd *, int, int);
void (*transport_complete_callback)(struct se_cmd *);
} ____cacheline_aligned;
#define T_TASK(cmd) ((cmd)->t_task)
#define CMD_TFO(cmd) ((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];
/* Used to signal demo mode created ACL, disabled by default */
bool dynamic_node_acl;
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_fabric_stat_group;
struct config_group *acl_default_groups[5];
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) ((cmd)->se_sess)
#define SE_NODE_ACL(sess) ((sess)->se_node_acl)
struct se_device;
struct se_transform_info;
struct scatterlist;
struct se_ml_stat_grps {
struct config_group stat_group;
struct config_group scsi_auth_intr_group;
struct config_group scsi_att_intr_port_group;
};
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;
struct se_ml_stat_grps ml_stat_grps;
} ____cacheline_aligned;
#define ML_STAT_GRPS(lacl) (&(lacl)->ml_stat_grps)
struct se_dev_entry {
bool def_pr_registered;
/* See transport_lunflags_table */
u32 lun_flags;
u32 deve_cmds;
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_limits {
/* Max supported HW queue depth */
u32 hw_queue_depth;
/* Max supported virtual queue depth */
u32 queue_depth;
/* From include/linux/blkdev.h for the other HW/SW limits. */
struct queue_limits limits;
} ____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_tpu;
int emulate_tpws;
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 optimal_sectors;
u32 hw_queue_depth;
u32 queue_depth;
u32 task_timeout;
u32 max_unmap_lba_count;
u32 max_unmap_block_desc_count;
u32 unmap_granularity;
u32 unmap_granularity_alignment;
struct se_subsystem_dev *da_sub_dev;
struct config_group da_group;
} ____cacheline_aligned;
struct se_dev_stat_grps {
struct config_group stat_group;
struct config_group scsi_dev_group;
struct config_group scsi_tgt_dev_group;
struct config_group scsi_lu_group;
};
struct se_subsystem_dev {
/* Used for struct se_subsystem_dev-->se_dev_alias, must be less than PAGE_SIZE */
#define SE_DEV_ALIAS_LEN 512
unsigned char se_dev_alias[SE_DEV_ALIAS_LEN];
/* Used for struct se_subsystem_dev->se_dev_udev_path[], must be less than PAGE_SIZE */
#define SE_UDEV_PATH_LEN 512
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;
/* 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 target_core_stat.c groups */
struct se_dev_stat_grps dev_stat_grps;
} ____cacheline_aligned;
#define T10_ALUA(su_dev) (&(su_dev)->t10_alua)
#define T10_RES(su_dev) (&(su_dev)->t10_reservation)
#define T10_PR_OPS(su_dev) (&(su_dev)->t10_reservation.pr_ops)
#define DEV_STAT_GRP(dev) (&(dev)->dev_stat_grps)
struct se_device {
/* 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;
/* See transport_device_status_table */
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;
/* 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;
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) ((cmd)->se_lun->lun_se_dev)
#define SU_DEV(dev) ((dev)->se_sub_dev)
#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_id;
/* See hba_flags_table */
u32 hba_flags;
/* Virtual iSCSI devices attached. */
u32 dev_count;
u32 hba_index;
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 SE_HBA(dev) ((dev)->se_hba)
struct se_port_stat_grps {
struct config_group stat_group;
struct config_group scsi_port_group;
struct config_group scsi_tgt_port_group;
struct config_group scsi_transport_group;
};
struct se_lun {
/* See transport_lun_status_table */
enum transport_lun_status_table 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 se_port *lun_sep;
struct config_group lun_group;
struct se_port_stat_grps port_stat_grps;
} ____cacheline_aligned;
#define SE_LUN(cmd) ((cmd)->se_lun)
#define PORT_STAT_GRP(lun) (&(lun)->port_stat_grps)
struct scsi_port_stats {
u64 cmd_pdus;
u64 tx_data_octets;
u64 rx_data_octets;
} ____cacheline_aligned;
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 se_portal_group *tpg_np_parent;
struct config_group tpg_np_group;
} ____cacheline_aligned;
struct se_portal_group {
/* Type of target portal group, see transport_tpg_type_table */
enum transport_tpg_type_table 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 associated 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) ((se_tpg)->se_tpg_tfo)
struct se_wwn {
struct target_fabric_configfs *wwn_tf;
struct config_group wwn_group;
struct config_group *wwn_default_groups[2];
struct config_group fabric_stat_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 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;
spinlock_t g_device_lock;
spinlock_t hba_lock;
spinlock_t se_tpg_lock;
spinlock_t lu_gps_lock;
spinlock_t plugin_class_lock;
} ____cacheline_aligned;
#endif /* TARGET_CORE_BASE_H */