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linux-next/include/target/target_core_base.h
Christoph Hellwig 7a971b1b30 target: replace se_cmd->execute_rw with a protocol_data field 
Instead of leaking this SBC read/write implementation detail just add an
opaqueue protocol specific pointer to struct se_cmd that we can assign
the sbc_ops vector to.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Andy Grover <agrover@redhat.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2015-06-23 00:43:42 -07:00

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#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 <linux/percpu_ida.h>
#include <scsi/scsi_cmnd.h>
#include <net/sock.h>
#include <net/tcp.h>
#define TARGET_CORE_MOD_VERSION "v4.1.0"
#define TARGET_CORE_VERSION TARGET_CORE_MOD_VERSION
/*
* 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_DESC_TYPE_OFFSET 8
#define SPC_ADDITIONAL_DESC_LEN_OFFSET 9
#define SPC_VALIDITY_OFFSET 10
#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 254
/* 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
/* Attempts before moving from SHORT to LONG */
#define PYX_TRANSPORT_WINDOW_CLOSED_THRESHOLD 3
#define PYX_TRANSPORT_WINDOW_CLOSED_WAIT_SHORT 3 /* In milliseconds */
#define PYX_TRANSPORT_WINDOW_CLOSED_WAIT_LONG 10 /* In milliseconds */
#define PYX_TRANSPORT_STATUS_INTERVAL 5 /* In seconds */
/* struct se_dev_attrib sanity values */
/* Default max_unmap_lba_count */
#define DA_MAX_UNMAP_LBA_COUNT 0
/* Default max_unmap_block_desc_count */
#define DA_MAX_UNMAP_BLOCK_DESC_COUNT 0
/* Default unmap_granularity */
#define DA_UNMAP_GRANULARITY_DEFAULT 0
/* Default unmap_granularity_alignment */
#define DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT 0
/* Default max_write_same_len, disabled by default */
#define DA_MAX_WRITE_SAME_LEN 0
/* Use a model alias based on the configfs backend device name */
#define DA_EMULATE_MODEL_ALIAS 0
/* Emulation for WriteCache and SYNCHRONIZE_CACHE */
#define DA_EMULATE_WRITE_CACHE 0
/* Emulation for UNIT ATTENTION Interlock Control */
#define DA_EMULATE_UA_INTLLCK_CTRL 0
/* Emulation for TASK_ABORTED status (TAS) by default */
#define DA_EMULATE_TAS 1
/* Emulation for Thin Provisioning UNMAP using block/blk-lib.c:blkdev_issue_discard() */
#define DA_EMULATE_TPU 0
/*
* Emulation for Thin Provisioning WRITE_SAME w/ UNMAP=1 bit using
* block/blk-lib.c:blkdev_issue_discard()
*/
#define DA_EMULATE_TPWS 0
/* Emulation for CompareAndWrite (AtomicTestandSet) by default */
#define DA_EMULATE_CAW 1
/* Emulation for 3rd Party Copy (ExtendedCopy) by default */
#define DA_EMULATE_3PC 1
/* No Emulation for PSCSI by default */
#define DA_EMULATE_ALUA 0
/* Enforce SCSI Initiator Port TransportID with 'ISID' for PR */
#define DA_ENFORCE_PR_ISIDS 1
/* Force SPC-3 PR Activate Persistence across Target Power Loss */
#define DA_FORCE_PR_APTPL 0
#define DA_STATUS_MAX_SECTORS_MIN 16
#define DA_STATUS_MAX_SECTORS_MAX 8192
/* By default don't report non-rotating (solid state) medium */
#define DA_IS_NONROT 0
/* Queue Algorithm Modifier default for restricted reordering in control mode page */
#define DA_EMULATE_REST_REORD 0
#define SE_INQUIRY_BUF 1024
#define SE_MODE_PAGE_BUF 512
#define SE_SENSE_BUF 96
/* struct se_hba->hba_flags */
enum hba_flags_table {
HBA_FLAGS_INTERNAL_USE = 0x01,
HBA_FLAGS_PSCSI_MODE = 0x02,
};
/* Special transport agnostic struct se_cmd->t_states */
enum transport_state_table {
TRANSPORT_NO_STATE = 0,
TRANSPORT_NEW_CMD = 1,
TRANSPORT_WRITE_PENDING = 3,
TRANSPORT_PROCESSING = 5,
TRANSPORT_COMPLETE = 6,
TRANSPORT_ISTATE_PROCESSING = 11,
TRANSPORT_COMPLETE_QF_WP = 18,
TRANSPORT_COMPLETE_QF_OK = 19,
};
/* 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_CDB = 0x00000008,
SCF_SCSI_TMR_CDB = 0x00000010,
SCF_FUA = 0x00000080,
SCF_SE_LUN_CMD = 0x00000100,
SCF_BIDI = 0x00000400,
SCF_SENT_CHECK_CONDITION = 0x00000800,
SCF_OVERFLOW_BIT = 0x00001000,
SCF_UNDERFLOW_BIT = 0x00002000,
SCF_SEND_DELAYED_TAS = 0x00004000,
SCF_ALUA_NON_OPTIMIZED = 0x00008000,
SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC = 0x00020000,
SCF_COMPARE_AND_WRITE = 0x00080000,
SCF_COMPARE_AND_WRITE_POST = 0x00100000,
SCF_PASSTHROUGH_PROT_SG_TO_MEM_NOALLOC = 0x00200000,
};
/* struct se_dev_entry->lun_flags and struct se_lun->lun_access */
enum transport_lunflags_table {
TRANSPORT_LUNFLAGS_READ_ONLY = 0x01,
TRANSPORT_LUNFLAGS_READ_WRITE = 0x02,
};
/*
* Used by transport_send_check_condition_and_sense()
* to signal which ASC/ASCQ sense payload should be built.
*/
typedef unsigned __bitwise__ sense_reason_t;
enum tcm_sense_reason_table {
#define R(x) (__force sense_reason_t )(x)
TCM_NO_SENSE = R(0x00),
TCM_NON_EXISTENT_LUN = R(0x01),
TCM_UNSUPPORTED_SCSI_OPCODE = R(0x02),
TCM_INCORRECT_AMOUNT_OF_DATA = R(0x03),
TCM_UNEXPECTED_UNSOLICITED_DATA = R(0x04),
TCM_SERVICE_CRC_ERROR = R(0x05),
TCM_SNACK_REJECTED = R(0x06),
TCM_SECTOR_COUNT_TOO_MANY = R(0x07),
TCM_INVALID_CDB_FIELD = R(0x08),
TCM_INVALID_PARAMETER_LIST = R(0x09),
TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE = R(0x0a),
TCM_UNKNOWN_MODE_PAGE = R(0x0b),
TCM_WRITE_PROTECTED = R(0x0c),
TCM_CHECK_CONDITION_ABORT_CMD = R(0x0d),
TCM_CHECK_CONDITION_UNIT_ATTENTION = R(0x0e),
TCM_CHECK_CONDITION_NOT_READY = R(0x0f),
TCM_RESERVATION_CONFLICT = R(0x10),
TCM_ADDRESS_OUT_OF_RANGE = R(0x11),
TCM_OUT_OF_RESOURCES = R(0x12),
TCM_PARAMETER_LIST_LENGTH_ERROR = R(0x13),
TCM_MISCOMPARE_VERIFY = R(0x14),
TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED = R(0x15),
TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED = R(0x16),
TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED = R(0x17),
#undef R
};
enum target_sc_flags_table {
TARGET_SCF_BIDI_OP = 0x01,
TARGET_SCF_ACK_KREF = 0x02,
TARGET_SCF_UNKNOWN_SIZE = 0x04,
};
/* fabric independent task management function values */
enum tcm_tmreq_table {
TMR_ABORT_TASK = 1,
TMR_ABORT_TASK_SET = 2,
TMR_CLEAR_ACA = 3,
TMR_CLEAR_TASK_SET = 4,
TMR_LUN_RESET = 5,
TMR_TARGET_WARM_RESET = 6,
TMR_TARGET_COLD_RESET = 7,
};
/* fabric independent task management response values */
enum tcm_tmrsp_table {
TMR_FUNCTION_FAILED = 0,
TMR_FUNCTION_COMPLETE = 1,
TMR_TASK_DOES_NOT_EXIST = 2,
TMR_LUN_DOES_NOT_EXIST = 3,
TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED = 4,
TMR_FUNCTION_REJECTED = 5,
};
/*
* 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 se_cmd;
struct t10_alua_lba_map_member {
struct list_head lba_map_mem_list;
int lba_map_mem_alua_state;
int lba_map_mem_alua_pg_id;
};
struct t10_alua_lba_map {
u64 lba_map_first_lba;
u64 lba_map_last_lba;
struct list_head lba_map_list;
struct list_head lba_map_mem_list;
};
struct t10_alua {
/* ALUA Target Port Group ID */
u16 alua_tg_pt_gps_counter;
u32 alua_tg_pt_gps_count;
/* Referrals support */
spinlock_t lba_map_lock;
u32 lba_map_segment_size;
u32 lba_map_segment_multiplier;
struct list_head lba_map_list;
spinlock_t tg_pt_gps_lock;
struct se_device *t10_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;
struct list_head tg_pt_gps_list;
};
struct t10_alua_lu_gp {
u16 lu_gp_id;
int lu_gp_valid_id;
u32 lu_gp_members;
atomic_t lu_gp_ref_cnt;
spinlock_t lu_gp_lock;
struct config_group lu_gp_group;
struct list_head lu_gp_node;
struct list_head lu_gp_mem_list;
};
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;
};
struct t10_alua_tg_pt_gp {
u16 tg_pt_gp_id;
int tg_pt_gp_valid_id;
int tg_pt_gp_alua_supported_states;
int tg_pt_gp_alua_pending_state;
int tg_pt_gp_alua_previous_state;
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_implicit_trans_secs;
int tg_pt_gp_pref;
int tg_pt_gp_write_metadata;
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_device *tg_pt_gp_dev;
struct config_group tg_pt_gp_group;
struct list_head tg_pt_gp_list;
struct list_head tg_pt_gp_lun_list;
struct se_lun *tg_pt_gp_alua_lun;
struct se_node_acl *tg_pt_gp_alua_nacl;
struct delayed_work tg_pt_gp_transition_work;
struct completion *tg_pt_gp_transition_complete;
};
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;
};
struct t10_wwn {
char vendor[8];
char model[16];
char revision[4];
char unit_serial[INQUIRY_VPD_SERIAL_LEN];
spinlock_t t10_vpd_lock;
struct se_device *t10_dev;
struct config_group t10_wwn_group;
struct list_head t10_vpd_list;
};
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];
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;
u64 pr_res_mapped_lun;
u64 pr_aptpl_target_lun;
u16 tg_pt_sep_rtpi;
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;
/* Used by ALL_TG_PT=1 registration with deve->pr_ref taken */
struct se_dev_entry *pr_reg_deve;
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;
};
struct t10_reservation {
/* Reservation effects all target ports */
int pr_all_tg_pt;
/* Activate Persistence across Target Power Loss enabled
* for SCSI device */
int pr_aptpl_active;
#define PR_APTPL_BUF_LEN 262144
u32 pr_generation;
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 se_tmr_req {
/* Task Management function to be performed */
u8 function;
/* Task Management response to send */
u8 response;
int call_transport;
/* Reference to ITT that Task Mgmt should be performed */
u64 ref_task_tag;
void *fabric_tmr_ptr;
struct se_cmd *task_cmd;
struct se_device *tmr_dev;
struct se_lun *tmr_lun;
struct list_head tmr_list;
};
enum target_prot_op {
TARGET_PROT_NORMAL = 0,
TARGET_PROT_DIN_INSERT = (1 << 0),
TARGET_PROT_DOUT_INSERT = (1 << 1),
TARGET_PROT_DIN_STRIP = (1 << 2),
TARGET_PROT_DOUT_STRIP = (1 << 3),
TARGET_PROT_DIN_PASS = (1 << 4),
TARGET_PROT_DOUT_PASS = (1 << 5),
};
#define TARGET_PROT_ALL TARGET_PROT_DIN_INSERT | TARGET_PROT_DOUT_INSERT | \
TARGET_PROT_DIN_STRIP | TARGET_PROT_DOUT_STRIP | \
TARGET_PROT_DIN_PASS | TARGET_PROT_DOUT_PASS
enum target_prot_type {
TARGET_DIF_TYPE0_PROT,
TARGET_DIF_TYPE1_PROT,
TARGET_DIF_TYPE2_PROT,
TARGET_DIF_TYPE3_PROT,
};
enum target_core_dif_check {
TARGET_DIF_CHECK_GUARD = 0x1 << 0,
TARGET_DIF_CHECK_APPTAG = 0x1 << 1,
TARGET_DIF_CHECK_REFTAG = 0x1 << 2,
};
struct se_dif_v1_tuple {
__be16 guard_tag;
__be16 app_tag;
__be32 ref_tag;
};
/* for sam_task_attr */
#define TCM_SIMPLE_TAG 0x20
#define TCM_HEAD_TAG 0x21
#define TCM_ORDERED_TAG 0x22
#define TCM_ACA_TAG 0x24
struct se_cmd {
/* SAM response code being sent to initiator */
u8 scsi_status;
u8 scsi_asc;
u8 scsi_ascq;
u16 scsi_sense_length;
u64 tag; /* SAM command identifier aka task tag */
/* 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;
/* Used for se_sess->sess_tag_pool */
unsigned int map_tag;
/* Transport protocol dependent state, see transport_state_table */
enum transport_state_table t_state;
unsigned cmd_wait_set:1;
unsigned unknown_data_length:1;
/* See se_cmd_flags_table */
u32 se_cmd_flags;
u32 se_ordered_id;
/* Total size in bytes associated with command */
u32 data_length;
u32 residual_count;
u64 orig_fe_lun;
/* Persistent Reservation key */
u64 pr_res_key;
/* Used for sense data */
void *sense_buffer;
struct list_head se_delayed_node;
struct list_head se_qf_node;
struct se_device *se_dev;
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;
struct list_head se_cmd_list;
struct completion cmd_wait_comp;
struct kref cmd_kref;
const struct target_core_fabric_ops *se_tfo;
sense_reason_t (*execute_cmd)(struct se_cmd *);
sense_reason_t (*transport_complete_callback)(struct se_cmd *, bool);
void *protocol_data;
unsigned char *t_task_cdb;
unsigned char __t_task_cdb[TCM_MAX_COMMAND_SIZE];
unsigned long long t_task_lba;
unsigned int t_task_nolb;
unsigned int transport_state;
#define CMD_T_ABORTED (1 << 0)
#define CMD_T_ACTIVE (1 << 1)
#define CMD_T_COMPLETE (1 << 2)
#define CMD_T_SENT (1 << 4)
#define CMD_T_STOP (1 << 5)
#define CMD_T_DEV_ACTIVE (1 << 7)
#define CMD_T_REQUEST_STOP (1 << 8)
#define CMD_T_BUSY (1 << 9)
spinlock_t t_state_lock;
struct completion t_transport_stop_comp;
struct work_struct work;
struct scatterlist *t_data_sg;
struct scatterlist *t_data_sg_orig;
unsigned int t_data_nents;
unsigned int t_data_nents_orig;
void *t_data_vmap;
struct scatterlist *t_bidi_data_sg;
unsigned int t_bidi_data_nents;
struct list_head state_list;
bool state_active;
/* old task stop completion, consider merging with some of the above */
struct completion task_stop_comp;
/* backend private data */
void *priv;
/* Used for lun->lun_ref counting */
int lun_ref_active;
/* DIF related members */
enum target_prot_op prot_op;
enum target_prot_type prot_type;
u8 prot_checks;
u32 prot_length;
u32 reftag_seed;
struct scatterlist *t_prot_sg;
unsigned int t_prot_nents;
sense_reason_t pi_err;
sector_t bad_sector;
bool prot_pto;
};
struct se_ua {
u8 ua_asc;
u8 ua_ascq;
struct list_head ua_nacl_list;
};
struct se_node_acl {
char initiatorname[TRANSPORT_IQN_LEN];
/* Used to signal demo mode created ACL, disabled by default */
bool dynamic_node_acl;
bool acl_stop:1;
u32 queue_depth;
u32 acl_index;
enum target_prot_type saved_prot_type;
#define MAX_ACL_TAG_SIZE 64
char acl_tag[MAX_ACL_TAG_SIZE];
/* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
atomic_t acl_pr_ref_count;
struct hlist_head lun_entry_hlist;
struct se_session *nacl_sess;
struct se_portal_group *se_tpg;
struct mutex lun_entry_mutex;
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;
struct completion acl_free_comp;
struct kref acl_kref;
};
struct se_session {
unsigned sess_tearing_down:1;
u64 sess_bin_isid;
enum target_prot_op sup_prot_ops;
enum target_prot_type sess_prot_type;
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;
struct list_head sess_cmd_list;
struct list_head sess_wait_list;
spinlock_t sess_cmd_lock;
struct kref sess_kref;
void *sess_cmd_map;
struct percpu_ida sess_tag_pool;
};
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];
u64 mapped_lun;
struct se_node_acl *se_lun_nacl;
struct se_lun *se_lun;
struct config_group se_lun_group;
struct se_ml_stat_grps ml_stat_grps;
};
struct se_dev_entry {
/* See transport_lunflags_table */
u64 mapped_lun;
u64 pr_res_key;
u64 creation_time;
u32 lun_flags;
u32 attach_count;
atomic_long_t total_cmds;
atomic_long_t read_bytes;
atomic_long_t write_bytes;
atomic_t ua_count;
/* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
struct kref pr_kref;
struct completion pr_comp;
struct se_lun_acl __rcu *se_lun_acl;
spinlock_t ua_lock;
struct se_lun __rcu *se_lun;
#define DEF_PR_REG_ACTIVE 1
unsigned long deve_flags;
struct list_head alua_port_list;
struct list_head lun_link;
struct list_head ua_list;
struct hlist_node link;
struct rcu_head rcu_head;
};
struct se_dev_attrib {
int emulate_model_alias;
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_caw;
int emulate_3pc;
int pi_prot_format;
enum target_prot_type pi_prot_type;
enum target_prot_type hw_pi_prot_type;
int enforce_pr_isids;
int force_pr_aptpl;
int is_nonrot;
int emulate_rest_reord;
u32 hw_block_size;
u32 block_size;
u32 hw_max_sectors;
u32 optimal_sectors;
u32 hw_queue_depth;
u32 queue_depth;
u32 max_unmap_lba_count;
u32 max_unmap_block_desc_count;
u32 unmap_granularity;
u32 unmap_granularity_alignment;
u32 max_write_same_len;
u32 max_bytes_per_io;
struct se_device *da_dev;
struct config_group da_group;
};
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 scsi_port_stats {
atomic_long_t cmd_pdus;
atomic_long_t tx_data_octets;
atomic_long_t rx_data_octets;
};
struct se_lun {
u64 unpacked_lun;
#define SE_LUN_LINK_MAGIC 0xffff7771
u32 lun_link_magic;
u32 lun_access;
u32 lun_flags;
u32 lun_index;
/* RELATIVE TARGET PORT IDENTIFER */
u16 lun_rtpi;
atomic_t lun_acl_count;
struct se_device __rcu *lun_se_dev;
struct list_head lun_deve_list;
spinlock_t lun_deve_lock;
/* ALUA state */
int lun_tg_pt_secondary_stat;
int lun_tg_pt_secondary_write_md;
atomic_t lun_tg_pt_secondary_offline;
struct mutex lun_tg_pt_md_mutex;
/* ALUA target port group linkage */
struct list_head lun_tg_pt_gp_link;
struct t10_alua_tg_pt_gp *lun_tg_pt_gp;
spinlock_t lun_tg_pt_gp_lock;
struct se_portal_group *lun_tpg;
struct scsi_port_stats lun_stats;
struct config_group lun_group;
struct se_port_stat_grps port_stat_grps;
struct completion lun_ref_comp;
struct percpu_ref lun_ref;
struct list_head lun_dev_link;
struct hlist_node link;
struct rcu_head rcu_head;
};
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_device {
#define SE_DEV_LINK_MAGIC 0xfeeddeef
u32 dev_link_magic;
/* RELATIVE TARGET PORT IDENTIFER Counter */
u16 dev_rpti_counter;
/* Used for SAM Task Attribute ordering */
u32 dev_cur_ordered_id;
u32 dev_flags;
#define DF_CONFIGURED 0x00000001
#define DF_FIRMWARE_VPD_UNIT_SERIAL 0x00000002
#define DF_EMULATED_VPD_UNIT_SERIAL 0x00000004
#define DF_USING_UDEV_PATH 0x00000008
#define DF_USING_ALIAS 0x00000010
/* Physical device queue depth */
u32 queue_depth;
/* Used for SPC-2 reservations enforce of ISIDs */
u64 dev_res_bin_isid;
/* Pointer to transport specific device structure */
u32 dev_index;
u64 creation_time;
atomic_long_t num_resets;
atomic_long_t num_cmds;
atomic_long_t read_bytes;
atomic_long_t write_bytes;
/* Active commands on this virtual SE device */
atomic_t simple_cmds;
atomic_t dev_ordered_id;
atomic_t dev_ordered_sync;
atomic_t dev_qf_count;
u32 export_count;
spinlock_t delayed_cmd_lock;
spinlock_t execute_task_lock;
spinlock_t dev_reservation_lock;
unsigned int dev_reservation_flags;
#define DRF_SPC2_RESERVATIONS 0x00000001
#define DRF_SPC2_RESERVATIONS_WITH_ISID 0x00000002
spinlock_t se_port_lock;
spinlock_t se_tmr_lock;
spinlock_t qf_cmd_lock;
struct semaphore caw_sem;
/* 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 workqueue_struct *tmr_wq;
struct work_struct qf_work_queue;
struct list_head delayed_cmd_list;
struct list_head state_list;
struct list_head qf_cmd_list;
struct list_head g_dev_node;
/* Pointer to associated SE HBA */
struct se_hba *se_hba;
/* T10 Inquiry and VPD WWN Information */
struct t10_wwn t10_wwn;
/* T10 Asymmetric Logical Unit Assignment for Target Ports */
struct t10_alua t10_alua;
/* T10 SPC-2 + SPC-3 Reservations */
struct t10_reservation t10_pr;
struct se_dev_attrib dev_attrib;
struct config_group dev_group;
struct config_group dev_pr_group;
struct se_dev_stat_grps dev_stat_grps;
#define SE_DEV_ALIAS_LEN 512 /* must be less than PAGE_SIZE */
unsigned char dev_alias[SE_DEV_ALIAS_LEN];
#define SE_UDEV_PATH_LEN 512 /* must be less than PAGE_SIZE */
unsigned char udev_path[SE_UDEV_PATH_LEN];
/* Pointer to template of function pointers for transport */
const struct target_backend_ops *transport;
/* Linked list for struct se_hba struct se_device list */
struct list_head dev_list;
struct se_lun xcopy_lun;
/* Protection Information */
int prot_length;
/* For se_lun->lun_se_dev RCU read-side critical access */
u32 hba_index;
struct rcu_head rcu_head;
};
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;
/* Pointer to transport specific host structure. */
void *hba_ptr;
struct list_head hba_node;
spinlock_t device_lock;
struct config_group hba_group;
struct mutex hba_access_mutex;
struct target_backend *backend;
};
struct se_tpg_np {
struct se_portal_group *tpg_np_parent;
struct config_group tpg_np_group;
};
struct se_portal_group {
/*
* PROTOCOL IDENTIFIER value per SPC4, 7.5.1.
*
* Negative values can be used by fabric drivers for internal use TPGs.
*/
int proto_id;
/* 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 */
struct mutex acl_node_mutex;
/* Spinlock for adding/removing sessions */
spinlock_t session_lock;
struct mutex tpg_lun_mutex;
struct list_head se_tpg_node;
/* linked list for initiator ACL list */
struct list_head acl_node_list;
struct hlist_head tpg_lun_hlist;
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 */
const 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[7];
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_auth_group;
struct config_group tpg_param_group;
};
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;
};
static inline void atomic_inc_mb(atomic_t *v)
{
smp_mb__before_atomic();
atomic_inc(v);
smp_mb__after_atomic();
}
static inline void atomic_dec_mb(atomic_t *v)
{
smp_mb__before_atomic();
atomic_dec(v);
smp_mb__after_atomic();
}
#endif /* TARGET_CORE_BASE_H */
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