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linux/include/target/target_core_base.h
Anastasia Kovaleva ead0ffc95a scsi: target: core: Change ASCQ for residual write 
According to FCP-4 (9.4.2):

  If the command requested that data beyond the length specified by the
  FCP_DL field be transferred, then the device server shall set the
  FCP_RESID_OVER bit (see 9.5.8) to one in the FCP_RSP IU and:

  a) process the command normally except that data beyond the FCP_DL count
  shall not be requested or transferred;

  b) transfer no data and return CHECK CONDITION status with the sense key
  set to ILLEGAL REQUEST and the additional sense code set to INVALID FIELD
  IN COMMAND INFORMATION UNIT; or

  c) may transfer data and return CHECK CONDITION status with the sense key
  set to ABORTED COMMAND and the additional sense code set to INVALID FIELD
  IN COMMAND INFORMATION UNIT.

TCM follows b) and transfers no data for residual writes but returns
INVALID FIELD IN CDB instead of INVALID FIELD IN COMMAND INFORMATION UNIT.

Change the ASCQ to INVALID FIELD IN COMMAND INFORMATION UNIT to meet the
standard.

Link: https://lore.kernel.org/r/20201203082035.54566-4-a.kovaleva@yadro.com
Signed-off-by: Anastasia Kovaleva <a.kovaleva@yadro.com>
Signed-off-by: Roman Bolshakov <r.bolshakov@yadro.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2021-01-26 23:12:18 -05:00

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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef TARGET_CORE_BASE_H
#define TARGET_CORE_BASE_H
#include <linux/configfs.h> /* struct config_group */
#include <linux/dma-direction.h> /* enum dma_data_direction */
#include <linux/sbitmap.h>
#include <linux/percpu-refcount.h>
#include <linux/semaphore.h> /* struct semaphore */
#include <linux/completion.h>
#define TARGET_CORE_VERSION "v5.0"
/*
* Maximum size of a CDB that can be stored in se_cmd without allocating
* memory dynamically for the CDB.
*/
#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 96
/* 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
#define INQUIRY_VENDOR_LEN 8
#define INQUIRY_MODEL_LEN 16
#define INQUIRY_REVISION_LEN 4
/* 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 unmap_zeroes_data */
#define DA_UNMAP_ZEROES_DATA_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 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
/* Emulate SCSI2 RESERVE/RELEASE and Persistent Reservations by default */
#define DA_EMULATE_PR 1
/* 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,
TRANSPORT_COMPLETE_QF_ERR = 20,
};
/* 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_ALUA_NON_OPTIMIZED = 0x00008000,
SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC = 0x00020000,
SCF_COMPARE_AND_WRITE = 0x00080000,
SCF_PASSTHROUGH_PROT_SG_TO_MEM_NOALLOC = 0x00200000,
SCF_ACK_KREF = 0x00400000,
SCF_USE_CPUID = 0x00800000,
SCF_TASK_ATTR_SET = 0x01000000,
SCF_TREAT_READ_AS_NORMAL = 0x02000000,
};
/*
* 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),
TCM_COPY_TARGET_DEVICE_NOT_REACHABLE = R(0x18),
TCM_TOO_MANY_TARGET_DESCS = R(0x19),
TCM_UNSUPPORTED_TARGET_DESC_TYPE_CODE = R(0x1a),
TCM_TOO_MANY_SEGMENT_DESCS = R(0x1b),
TCM_UNSUPPORTED_SEGMENT_DESC_TYPE_CODE = R(0x1c),
TCM_INSUFFICIENT_REGISTRATION_RESOURCES = R(0x1d),
TCM_LUN_BUSY = R(0x1e),
TCM_INVALID_FIELD_IN_COMMAND_IU = R(0x1f),
#undef R
};
enum target_sc_flags_table {
TARGET_SCF_BIDI_OP = 0x01,
TARGET_SCF_ACK_KREF = 0x02,
TARGET_SCF_UNKNOWN_SIZE = 0x04,
TARGET_SCF_USE_CPUID = 0x08,
};
/* 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,
TMR_LUN_RESET_PRO = 0x80,
TMR_UNKNOWN = 0xff,
};
/* 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_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_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;
int tg_pt_gp_alua_access_state;
atomic_t tg_pt_gp_ref_cnt;
spinlock_t tg_pt_gp_lock;
struct mutex tg_pt_gp_transition_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 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 {
/*
* SCSI left aligned strings may not be null terminated. +1 to ensure a
* null terminator is always present.
*/
char vendor[INQUIRY_VENDOR_LEN + 1];
char model[INQUIRY_MODEL_LEN + 1];
char revision[INQUIRY_REVISION_LEN + 1];
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 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,
};
/* Emulation for UNIT ATTENTION Interlock Control */
enum target_ua_intlck_ctrl {
TARGET_UA_INTLCK_CTRL_CLEAR = 0,
TARGET_UA_INTLCK_CTRL_NO_CLEAR = 1,
TARGET_UA_INTLCK_CTRL_ESTABLISH_UA = 2,
};
enum target_core_dif_check {
TARGET_DIF_CHECK_GUARD = 0x1 << 0,
TARGET_DIF_CHECK_APPTAG = 0x1 << 1,
TARGET_DIF_CHECK_REFTAG = 0x1 << 2,
};
/* 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;
unsigned unknown_data_length:1;
bool state_active:1;
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;
int map_cpu;
/* Transport protocol dependent state, see transport_state_table */
enum transport_state_table t_state;
/* See se_cmd_flags_table */
u32 se_cmd_flags;
/* 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 *free_compl;
struct completion *abrt_compl;
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, int *);
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_TAS (1 << 10)
#define CMD_T_FABRIC_STOP (1 << 11)
spinlock_t t_state_lock;
struct kref cmd_kref;
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;
/* Used for lun->lun_ref counting */
int lun_ref_active;
struct list_head state_list;
/* backend private data */
void *priv;
/* DIF related members */
enum target_prot_op prot_op;
enum target_prot_type prot_type;
u8 prot_checks;
bool prot_pto;
u32 prot_length;
u32 reftag_seed;
struct scatterlist *t_prot_sg;
unsigned int t_prot_nents;
sense_reason_t pi_err;
u64 sense_info;
/*
* CPU LIO will execute the cmd on. Defaults to the CPU the cmd is
* initialized on. Drivers can override.
*/
int cpuid;
};
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 dynamic_stop;
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 list_head acl_list;
struct list_head acl_sess_list;
struct completion acl_free_comp;
struct kref acl_kref;
};
static inline struct se_node_acl *acl_to_nacl(struct config_item *item)
{
return container_of(to_config_group(item), struct se_node_acl,
acl_group);
}
static inline struct se_node_acl *attrib_to_nacl(struct config_item *item)
{
return container_of(to_config_group(item), struct se_node_acl,
acl_attrib_group);
}
static inline struct se_node_acl *auth_to_nacl(struct config_item *item)
{
return container_of(to_config_group(item), struct se_node_acl,
acl_auth_group);
}
static inline struct se_node_acl *param_to_nacl(struct config_item *item)
{
return container_of(to_config_group(item), struct se_node_acl,
acl_param_group);
}
static inline struct se_node_acl *fabric_stat_to_nacl(struct config_item *item)
{
return container_of(to_config_group(item), struct se_node_acl,
acl_fabric_stat_group);
}
struct se_session {
atomic_t stopped;
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 percpu_ref cmd_count;
struct list_head sess_list;
struct list_head sess_acl_list;
spinlock_t sess_cmd_lock;
wait_queue_head_t cmd_count_wq;
struct completion stop_done;
void *sess_cmd_map;
struct sbitmap_queue 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 {
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 {
u64 mapped_lun;
u64 pr_res_key;
u64 creation_time;
bool lun_access_ro;
u32 attach_count;
atomic_long_t total_cmds;
atomic_long_t read_bytes;
atomic_long_t write_bytes;
/* 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 {
bool emulate_model_alias;
bool emulate_dpo; /* deprecated */
bool emulate_fua_write;
bool emulate_fua_read; /* deprecated */
bool emulate_write_cache;
enum target_ua_intlck_ctrl emulate_ua_intlck_ctrl;
bool emulate_tas;
bool emulate_tpu;
bool emulate_tpws;
bool emulate_caw;
bool emulate_3pc;
bool emulate_pr;
enum target_prot_type pi_prot_type;
enum target_prot_type hw_pi_prot_type;
bool pi_prot_verify;
bool enforce_pr_isids;
bool force_pr_aptpl;
bool is_nonrot;
bool emulate_rest_reord;
bool unmap_zeroes_data;
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;
bool lun_shutdown;
bool lun_access_ro;
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_shutdown_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_queue {
struct list_head state_list;
spinlock_t lock;
};
struct se_device {
/* 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
#define DF_READ_ONLY 0x00000020
u8 transport_flags;
/* 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 aborts_complete;
atomic_long_t aborts_no_task;
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_sync;
atomic_t dev_qf_count;
u32 export_count;
spinlock_t delayed_cmd_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 reservations */
struct se_session *reservation_holder;
/* 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 work_struct qf_work_queue;
struct list_head delayed_cmd_list;
struct list_head qf_cmd_list;
/* 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_action_group;
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;
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;
int queue_cnt;
struct se_device_queue *queues;
};
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;
};
static inline struct se_tpg_np *to_tpg_np(struct config_item *item)
{
return container_of(to_config_group(item), struct se_tpg_np,
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;
/* 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;
/* 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_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;
};
static inline struct se_portal_group *to_tpg(struct config_item *item)
{
return container_of(to_config_group(item), struct se_portal_group,
tpg_group);
}
static inline struct se_portal_group *attrib_to_tpg(struct config_item *item)
{
return container_of(to_config_group(item), struct se_portal_group,
tpg_attrib_group);
}
static inline struct se_portal_group *auth_to_tpg(struct config_item *item)
{
return container_of(to_config_group(item), struct se_portal_group,
tpg_auth_group);
}
static inline struct se_portal_group *param_to_tpg(struct config_item *item)
{
return container_of(to_config_group(item), struct se_portal_group,
tpg_param_group);
}
struct se_wwn {
struct target_fabric_configfs *wwn_tf;
void *priv;
struct config_group wwn_group;
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();
}
static inline void target_free_tag(struct se_session *sess, struct se_cmd *cmd)
{
sbitmap_queue_clear(&sess->sess_tag_pool, cmd->map_tag, cmd->map_cpu);
}
#endif /* TARGET_CORE_BASE_H */
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