1 #ifndef TARGET_CORE_BASE_H
2 #define TARGET_CORE_BASE_H
5 #include <linux/configfs.h>
6 #include <linux/dma-mapping.h>
7 #include <linux/blkdev.h>
8 #include <linux/percpu_ida.h>
9 #include <scsi/scsi_cmnd.h>
13 #define TARGET_CORE_MOD_VERSION "v4.1.0"
14 #define TARGET_CORE_VERSION TARGET_CORE_MOD_VERSION
16 /* Maximum Number of LUNs per Target Portal Group */
17 /* Don't raise above 511 or REPORT_LUNS needs to handle >1 page */
18 #define TRANSPORT_MAX_LUNS_PER_TPG 256
20 * By default we use 32-byte CDBs in TCM Core and subsystem plugin code.
22 * Note that both include/scsi/scsi_cmnd.h:MAX_COMMAND_SIZE and
23 * include/linux/blkdev.h:BLOCK_MAX_CDB as of v2.6.36-rc4 still use
24 * 16-byte CDBs by default and require an extra allocation for
25 * 32-byte CDBs to because of legacy issues.
27 * Within TCM Core there are no such legacy limitiations, so we go ahead
28 * use 32-byte CDBs by default and use include/scsi/scsi.h:scsi_command_size()
29 * within all TCM Core and subsystem plugin code.
31 #define TCM_MAX_COMMAND_SIZE 32
33 * From include/scsi/scsi_cmnd.h:SCSI_SENSE_BUFFERSIZE, currently
34 * defined 96, but the real limit is 252 (or 260 including the header)
36 #define TRANSPORT_SENSE_BUFFER SCSI_SENSE_BUFFERSIZE
37 /* Used by transport_send_check_condition_and_sense() */
38 #define SPC_SENSE_KEY_OFFSET 2
39 #define SPC_ADD_SENSE_LEN_OFFSET 7
40 #define SPC_DESC_TYPE_OFFSET 8
41 #define SPC_ADDITIONAL_DESC_LEN_OFFSET 9
42 #define SPC_VALIDITY_OFFSET 10
43 #define SPC_ASC_KEY_OFFSET 12
44 #define SPC_ASCQ_KEY_OFFSET 13
45 #define TRANSPORT_IQN_LEN 224
46 /* Used by target_core_store_alua_lu_gp() and target_core_alua_lu_gp_show_attr_members() */
47 #define LU_GROUP_NAME_BUF 256
48 /* Used by core_alua_store_tg_pt_gp_info() and target_core_alua_tg_pt_gp_show_attr_members() */
49 #define TG_PT_GROUP_NAME_BUF 256
50 /* Used to parse VPD into struct t10_vpd */
51 #define VPD_TMP_BUF_SIZE 254
52 /* Used by transport_generic_cmd_sequencer() */
53 #define READ_BLOCK_LEN 6
54 #define READ_CAP_LEN 8
55 #define READ_POSITION_LEN 20
56 #define INQUIRY_LEN 36
57 /* Used by transport_get_inquiry_vpd_serial() */
58 #define INQUIRY_VPD_SERIAL_LEN 254
59 /* Used by transport_get_inquiry_vpd_device_ident() */
60 #define INQUIRY_VPD_DEVICE_IDENTIFIER_LEN 254
62 /* Attempts before moving from SHORT to LONG */
63 #define PYX_TRANSPORT_WINDOW_CLOSED_THRESHOLD 3
64 #define PYX_TRANSPORT_WINDOW_CLOSED_WAIT_SHORT 3 /* In milliseconds */
65 #define PYX_TRANSPORT_WINDOW_CLOSED_WAIT_LONG 10 /* In milliseconds */
67 #define PYX_TRANSPORT_STATUS_INTERVAL 5 /* In seconds */
69 /* struct se_dev_attrib sanity values */
70 /* Default max_unmap_lba_count */
71 #define DA_MAX_UNMAP_LBA_COUNT 0
72 /* Default max_unmap_block_desc_count */
73 #define DA_MAX_UNMAP_BLOCK_DESC_COUNT 0
74 /* Default unmap_granularity */
75 #define DA_UNMAP_GRANULARITY_DEFAULT 0
76 /* Default unmap_granularity_alignment */
77 #define DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT 0
78 /* Default max_write_same_len, disabled by default */
79 #define DA_MAX_WRITE_SAME_LEN 0
80 /* Use a model alias based on the configfs backend device name */
81 #define DA_EMULATE_MODEL_ALIAS 0
82 /* Emulation for WriteCache and SYNCHRONIZE_CACHE */
83 #define DA_EMULATE_WRITE_CACHE 0
84 /* Emulation for UNIT ATTENTION Interlock Control */
85 #define DA_EMULATE_UA_INTLLCK_CTRL 0
86 /* Emulation for TASK_ABORTED status (TAS) by default */
87 #define DA_EMULATE_TAS 1
88 /* Emulation for Thin Provisioning UNMAP using block/blk-lib.c:blkdev_issue_discard() */
89 #define DA_EMULATE_TPU 0
91 * Emulation for Thin Provisioning WRITE_SAME w/ UNMAP=1 bit using
92 * block/blk-lib.c:blkdev_issue_discard()
94 #define DA_EMULATE_TPWS 0
95 /* Emulation for CompareAndWrite (AtomicTestandSet) by default */
96 #define DA_EMULATE_CAW 1
97 /* Emulation for 3rd Party Copy (ExtendedCopy) by default */
98 #define DA_EMULATE_3PC 1
99 /* No Emulation for PSCSI by default */
100 #define DA_EMULATE_ALUA 0
101 /* Enforce SCSI Initiator Port TransportID with 'ISID' for PR */
102 #define DA_ENFORCE_PR_ISIDS 1
103 /* Force SPC-3 PR Activate Persistence across Target Power Loss */
104 #define DA_FORCE_PR_APTPL 0
105 #define DA_STATUS_MAX_SECTORS_MIN 16
106 #define DA_STATUS_MAX_SECTORS_MAX 8192
107 /* By default don't report non-rotating (solid state) medium */
108 #define DA_IS_NONROT 0
109 /* Queue Algorithm Modifier default for restricted reordering in control mode page */
110 #define DA_EMULATE_REST_REORD 0
112 #define SE_INQUIRY_BUF 1024
113 #define SE_MODE_PAGE_BUF 512
114 #define SE_SENSE_BUF 96
116 /* struct se_hba->hba_flags */
117 enum hba_flags_table {
118 HBA_FLAGS_INTERNAL_USE = 0x01,
119 HBA_FLAGS_PSCSI_MODE = 0x02,
122 /* Special transport agnostic struct se_cmd->t_states */
123 enum transport_state_table {
124 TRANSPORT_NO_STATE = 0,
125 TRANSPORT_NEW_CMD = 1,
126 TRANSPORT_WRITE_PENDING = 3,
127 TRANSPORT_PROCESSING = 5,
128 TRANSPORT_COMPLETE = 6,
129 TRANSPORT_ISTATE_PROCESSING = 11,
130 TRANSPORT_COMPLETE_QF_WP = 18,
131 TRANSPORT_COMPLETE_QF_OK = 19,
134 /* Used for struct se_cmd->se_cmd_flags */
135 enum se_cmd_flags_table {
136 SCF_SUPPORTED_SAM_OPCODE = 0x00000001,
137 SCF_TRANSPORT_TASK_SENSE = 0x00000002,
138 SCF_EMULATED_TASK_SENSE = 0x00000004,
139 SCF_SCSI_DATA_CDB = 0x00000008,
140 SCF_SCSI_TMR_CDB = 0x00000010,
141 SCF_FUA = 0x00000080,
142 SCF_SE_LUN_CMD = 0x00000100,
143 SCF_BIDI = 0x00000400,
144 SCF_SENT_CHECK_CONDITION = 0x00000800,
145 SCF_OVERFLOW_BIT = 0x00001000,
146 SCF_UNDERFLOW_BIT = 0x00002000,
147 SCF_SEND_DELAYED_TAS = 0x00004000,
148 SCF_ALUA_NON_OPTIMIZED = 0x00008000,
149 SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC = 0x00020000,
150 SCF_COMPARE_AND_WRITE = 0x00080000,
151 SCF_COMPARE_AND_WRITE_POST = 0x00100000,
152 SCF_PASSTHROUGH_PROT_SG_TO_MEM_NOALLOC = 0x00200000,
155 /* struct se_dev_entry->lun_flags and struct se_lun->lun_access */
156 enum transport_lunflags_table {
157 TRANSPORT_LUNFLAGS_READ_ONLY = 0x01,
158 TRANSPORT_LUNFLAGS_READ_WRITE = 0x02,
162 * Used by transport_send_check_condition_and_sense()
163 * to signal which ASC/ASCQ sense payload should be built.
165 typedef unsigned __bitwise__ sense_reason_t;
167 enum tcm_sense_reason_table {
168 #define R(x) (__force sense_reason_t )(x)
169 TCM_NO_SENSE = R(0x00),
170 TCM_NON_EXISTENT_LUN = R(0x01),
171 TCM_UNSUPPORTED_SCSI_OPCODE = R(0x02),
172 TCM_INCORRECT_AMOUNT_OF_DATA = R(0x03),
173 TCM_UNEXPECTED_UNSOLICITED_DATA = R(0x04),
174 TCM_SERVICE_CRC_ERROR = R(0x05),
175 TCM_SNACK_REJECTED = R(0x06),
176 TCM_SECTOR_COUNT_TOO_MANY = R(0x07),
177 TCM_INVALID_CDB_FIELD = R(0x08),
178 TCM_INVALID_PARAMETER_LIST = R(0x09),
179 TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE = R(0x0a),
180 TCM_UNKNOWN_MODE_PAGE = R(0x0b),
181 TCM_WRITE_PROTECTED = R(0x0c),
182 TCM_CHECK_CONDITION_ABORT_CMD = R(0x0d),
183 TCM_CHECK_CONDITION_UNIT_ATTENTION = R(0x0e),
184 TCM_CHECK_CONDITION_NOT_READY = R(0x0f),
185 TCM_RESERVATION_CONFLICT = R(0x10),
186 TCM_ADDRESS_OUT_OF_RANGE = R(0x11),
187 TCM_OUT_OF_RESOURCES = R(0x12),
188 TCM_PARAMETER_LIST_LENGTH_ERROR = R(0x13),
189 TCM_MISCOMPARE_VERIFY = R(0x14),
190 TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED = R(0x15),
191 TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED = R(0x16),
192 TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED = R(0x17),
196 enum target_sc_flags_table {
197 TARGET_SCF_BIDI_OP = 0x01,
198 TARGET_SCF_ACK_KREF = 0x02,
199 TARGET_SCF_UNKNOWN_SIZE = 0x04,
202 /* fabric independent task management function values */
203 enum tcm_tmreq_table {
205 TMR_ABORT_TASK_SET = 2,
207 TMR_CLEAR_TASK_SET = 4,
209 TMR_TARGET_WARM_RESET = 6,
210 TMR_TARGET_COLD_RESET = 7,
213 /* fabric independent task management response values */
214 enum tcm_tmrsp_table {
215 TMR_FUNCTION_FAILED = 0,
216 TMR_FUNCTION_COMPLETE = 1,
217 TMR_TASK_DOES_NOT_EXIST = 2,
218 TMR_LUN_DOES_NOT_EXIST = 3,
219 TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED = 4,
220 TMR_FUNCTION_REJECTED = 5,
224 * Used for target SCSI statistics
229 SCSI_AUTH_INTR_INDEX,
235 struct t10_alua_lba_map_member {
236 struct list_head lba_map_mem_list;
237 int lba_map_mem_alua_state;
238 int lba_map_mem_alua_pg_id;
241 struct t10_alua_lba_map {
242 u64 lba_map_first_lba;
243 u64 lba_map_last_lba;
244 struct list_head lba_map_list;
245 struct list_head lba_map_mem_list;
249 /* ALUA Target Port Group ID */
250 u16 alua_tg_pt_gps_counter;
251 u32 alua_tg_pt_gps_count;
252 /* Referrals support */
253 spinlock_t lba_map_lock;
254 u32 lba_map_segment_size;
255 u32 lba_map_segment_multiplier;
256 struct list_head lba_map_list;
257 spinlock_t tg_pt_gps_lock;
258 struct se_device *t10_dev;
259 /* Used for default ALUA Target Port Group */
260 struct t10_alua_tg_pt_gp *default_tg_pt_gp;
261 /* Used for default ALUA Target Port Group ConfigFS group */
262 struct config_group alua_tg_pt_gps_group;
263 struct list_head tg_pt_gps_list;
266 struct t10_alua_lu_gp {
270 atomic_t lu_gp_ref_cnt;
271 spinlock_t lu_gp_lock;
272 struct config_group lu_gp_group;
273 struct list_head lu_gp_node;
274 struct list_head lu_gp_mem_list;
277 struct t10_alua_lu_gp_member {
279 atomic_t lu_gp_mem_ref_cnt;
280 spinlock_t lu_gp_mem_lock;
281 struct t10_alua_lu_gp *lu_gp;
282 struct se_device *lu_gp_mem_dev;
283 struct list_head lu_gp_mem_list;
286 struct t10_alua_tg_pt_gp {
288 int tg_pt_gp_valid_id;
289 int tg_pt_gp_alua_supported_states;
290 int tg_pt_gp_alua_pending_state;
291 int tg_pt_gp_alua_previous_state;
292 int tg_pt_gp_alua_access_status;
293 int tg_pt_gp_alua_access_type;
294 int tg_pt_gp_nonop_delay_msecs;
295 int tg_pt_gp_trans_delay_msecs;
296 int tg_pt_gp_implicit_trans_secs;
298 int tg_pt_gp_write_metadata;
299 u32 tg_pt_gp_members;
300 atomic_t tg_pt_gp_alua_access_state;
301 atomic_t tg_pt_gp_ref_cnt;
302 spinlock_t tg_pt_gp_lock;
303 struct mutex tg_pt_gp_md_mutex;
304 struct se_device *tg_pt_gp_dev;
305 struct config_group tg_pt_gp_group;
306 struct list_head tg_pt_gp_list;
307 struct list_head tg_pt_gp_lun_list;
308 struct se_lun *tg_pt_gp_alua_lun;
309 struct se_node_acl *tg_pt_gp_alua_nacl;
310 struct delayed_work tg_pt_gp_transition_work;
311 struct completion *tg_pt_gp_transition_complete;
315 unsigned char device_identifier[INQUIRY_VPD_DEVICE_IDENTIFIER_LEN];
316 int protocol_identifier_set;
317 u32 protocol_identifier;
318 u32 device_identifier_code_set;
320 u32 device_identifier_type;
321 struct list_head vpd_list;
328 char unit_serial[INQUIRY_VPD_SERIAL_LEN];
329 spinlock_t t10_vpd_lock;
330 struct se_device *t10_dev;
331 struct config_group t10_wwn_group;
332 struct list_head t10_vpd_list;
335 struct t10_pr_registration {
336 /* Used for fabrics that contain WWN+ISID */
337 #define PR_REG_ISID_LEN 16
338 /* PR_REG_ISID_LEN + ',i,0x' */
339 #define PR_REG_ISID_ID_LEN (PR_REG_ISID_LEN + 5)
340 char pr_reg_isid[PR_REG_ISID_LEN];
341 /* Used during APTPL metadata reading */
342 #define PR_APTPL_MAX_IPORT_LEN 256
343 unsigned char pr_iport[PR_APTPL_MAX_IPORT_LEN];
344 /* Used during APTPL metadata reading */
345 #define PR_APTPL_MAX_TPORT_LEN 256
346 unsigned char pr_tport[PR_APTPL_MAX_TPORT_LEN];
349 /* Reservation effects all target ports */
350 int pr_reg_all_tg_pt;
351 /* Activate Persistence across Target Power Loss */
356 /* Used for fabric initiator WWPNs using a ISID */
357 bool isid_present_at_reg;
358 u64 pr_res_mapped_lun;
359 u64 pr_aptpl_target_lun;
361 u32 pr_res_generation;
364 atomic_t pr_res_holders;
365 struct se_node_acl *pr_reg_nacl;
366 /* Used by ALL_TG_PT=1 registration with deve->pr_ref taken */
367 struct se_dev_entry *pr_reg_deve;
368 struct list_head pr_reg_list;
369 struct list_head pr_reg_abort_list;
370 struct list_head pr_reg_aptpl_list;
371 struct list_head pr_reg_atp_list;
372 struct list_head pr_reg_atp_mem_list;
375 struct t10_reservation {
376 /* Reservation effects all target ports */
378 /* Activate Persistence across Target Power Loss enabled
381 #define PR_APTPL_BUF_LEN 262144
383 spinlock_t registration_lock;
384 spinlock_t aptpl_reg_lock;
386 * This will always be set by one individual I_T Nexus.
387 * However with all_tg_pt=1, other I_T Nexus from the
388 * same initiator can access PR reg/res info on a different
391 * There is also the 'All Registrants' case, where there is
392 * a single *pr_res_holder of the reservation, but all
393 * registrations are considered reservation holders.
395 struct se_node_acl *pr_res_holder;
396 struct list_head registration_list;
397 struct list_head aptpl_reg_list;
401 /* Task Management function to be performed */
403 /* Task Management response to send */
406 /* Reference to ITT that Task Mgmt should be performed */
408 void *fabric_tmr_ptr;
409 struct se_cmd *task_cmd;
410 struct se_device *tmr_dev;
411 struct se_lun *tmr_lun;
412 struct list_head tmr_list;
415 enum target_prot_op {
416 TARGET_PROT_NORMAL = 0,
417 TARGET_PROT_DIN_INSERT = (1 << 0),
418 TARGET_PROT_DOUT_INSERT = (1 << 1),
419 TARGET_PROT_DIN_STRIP = (1 << 2),
420 TARGET_PROT_DOUT_STRIP = (1 << 3),
421 TARGET_PROT_DIN_PASS = (1 << 4),
422 TARGET_PROT_DOUT_PASS = (1 << 5),
425 #define TARGET_PROT_ALL TARGET_PROT_DIN_INSERT | TARGET_PROT_DOUT_INSERT | \
426 TARGET_PROT_DIN_STRIP | TARGET_PROT_DOUT_STRIP | \
427 TARGET_PROT_DIN_PASS | TARGET_PROT_DOUT_PASS
429 enum target_prot_type {
430 TARGET_DIF_TYPE0_PROT,
431 TARGET_DIF_TYPE1_PROT,
432 TARGET_DIF_TYPE2_PROT,
433 TARGET_DIF_TYPE3_PROT,
436 enum target_core_dif_check {
437 TARGET_DIF_CHECK_GUARD = 0x1 << 0,
438 TARGET_DIF_CHECK_APPTAG = 0x1 << 1,
439 TARGET_DIF_CHECK_REFTAG = 0x1 << 2,
442 struct se_dif_v1_tuple {
448 /* for sam_task_attr */
449 #define TCM_SIMPLE_TAG 0x20
450 #define TCM_HEAD_TAG 0x21
451 #define TCM_ORDERED_TAG 0x22
452 #define TCM_ACA_TAG 0x24
455 /* SAM response code being sent to initiator */
459 u16 scsi_sense_length;
460 u64 tag; /* SAM command identifier aka task tag */
461 /* Delay for ALUA Active/NonOptimized state access in milliseconds */
462 int alua_nonop_delay;
463 /* See include/linux/dma-mapping.h */
464 enum dma_data_direction data_direction;
465 /* For SAM Task Attribute */
467 /* Used for se_sess->sess_tag_pool */
468 unsigned int map_tag;
469 /* Transport protocol dependent state, see transport_state_table */
470 enum transport_state_table t_state;
471 unsigned cmd_wait_set:1;
472 unsigned unknown_data_length:1;
473 /* See se_cmd_flags_table */
476 /* Total size in bytes associated with command */
480 /* Persistent Reservation key */
482 /* Used for sense data */
484 struct list_head se_delayed_node;
485 struct list_head se_qf_node;
486 struct se_device *se_dev;
487 struct se_lun *se_lun;
488 /* Only used for internal passthrough and legacy TCM fabric modules */
489 struct se_session *se_sess;
490 struct se_tmr_req *se_tmr_req;
491 struct list_head se_cmd_list;
492 struct completion cmd_wait_comp;
493 struct kref cmd_kref;
494 const struct target_core_fabric_ops *se_tfo;
495 sense_reason_t (*execute_cmd)(struct se_cmd *);
496 sense_reason_t (*execute_rw)(struct se_cmd *, struct scatterlist *,
497 u32, enum dma_data_direction);
498 sense_reason_t (*transport_complete_callback)(struct se_cmd *, bool);
500 unsigned char *t_task_cdb;
501 unsigned char __t_task_cdb[TCM_MAX_COMMAND_SIZE];
502 unsigned long long t_task_lba;
503 unsigned int t_task_nolb;
504 unsigned int transport_state;
505 #define CMD_T_ABORTED (1 << 0)
506 #define CMD_T_ACTIVE (1 << 1)
507 #define CMD_T_COMPLETE (1 << 2)
508 #define CMD_T_SENT (1 << 4)
509 #define CMD_T_STOP (1 << 5)
510 #define CMD_T_DEV_ACTIVE (1 << 7)
511 #define CMD_T_REQUEST_STOP (1 << 8)
512 #define CMD_T_BUSY (1 << 9)
513 spinlock_t t_state_lock;
514 struct completion t_transport_stop_comp;
516 struct work_struct work;
518 struct scatterlist *t_data_sg;
519 struct scatterlist *t_data_sg_orig;
520 unsigned int t_data_nents;
521 unsigned int t_data_nents_orig;
523 struct scatterlist *t_bidi_data_sg;
524 unsigned int t_bidi_data_nents;
526 struct list_head state_list;
529 /* old task stop completion, consider merging with some of the above */
530 struct completion task_stop_comp;
532 /* backend private data */
535 /* Used for lun->lun_ref counting */
538 /* DIF related members */
539 enum target_prot_op prot_op;
540 enum target_prot_type prot_type;
544 struct scatterlist *t_prot_sg;
545 unsigned int t_prot_nents;
546 sense_reason_t pi_err;
554 struct se_node_acl *ua_nacl;
555 struct list_head ua_nacl_list;
559 char initiatorname[TRANSPORT_IQN_LEN];
560 /* Used to signal demo mode created ACL, disabled by default */
561 bool dynamic_node_acl;
565 enum target_prot_type saved_prot_type;
566 #define MAX_ACL_TAG_SIZE 64
567 char acl_tag[MAX_ACL_TAG_SIZE];
568 /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
569 atomic_t acl_pr_ref_count;
570 struct hlist_head lun_entry_hlist;
571 struct se_session *nacl_sess;
572 struct se_portal_group *se_tpg;
573 struct mutex lun_entry_mutex;
574 spinlock_t nacl_sess_lock;
575 struct config_group acl_group;
576 struct config_group acl_attrib_group;
577 struct config_group acl_auth_group;
578 struct config_group acl_param_group;
579 struct config_group acl_fabric_stat_group;
580 struct config_group *acl_default_groups[5];
581 struct list_head acl_list;
582 struct list_head acl_sess_list;
583 struct completion acl_free_comp;
584 struct kref acl_kref;
588 unsigned sess_tearing_down:1;
590 enum target_prot_op sup_prot_ops;
591 enum target_prot_type sess_prot_type;
592 struct se_node_acl *se_node_acl;
593 struct se_portal_group *se_tpg;
594 void *fabric_sess_ptr;
595 struct list_head sess_list;
596 struct list_head sess_acl_list;
597 struct list_head sess_cmd_list;
598 struct list_head sess_wait_list;
599 spinlock_t sess_cmd_lock;
600 struct kref sess_kref;
602 struct percpu_ida sess_tag_pool;
606 struct se_transform_info;
609 struct se_ml_stat_grps {
610 struct config_group stat_group;
611 struct config_group scsi_auth_intr_group;
612 struct config_group scsi_att_intr_port_group;
616 char initiatorname[TRANSPORT_IQN_LEN];
618 struct se_node_acl *se_lun_nacl;
619 struct se_lun *se_lun;
620 struct config_group se_lun_group;
621 struct se_ml_stat_grps ml_stat_grps;
624 struct se_dev_entry {
625 /* See transport_lunflags_table */
631 atomic_long_t total_cmds;
632 atomic_long_t read_bytes;
633 atomic_long_t write_bytes;
635 /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
637 struct completion pr_comp;
638 struct se_lun_acl __rcu *se_lun_acl;
640 struct se_lun __rcu *se_lun;
641 #define DEF_PR_REG_ACTIVE 1
642 unsigned long deve_flags;
643 struct list_head alua_port_list;
644 struct list_head lun_link;
645 struct list_head ua_list;
646 struct hlist_node link;
647 struct rcu_head rcu_head;
650 struct se_dev_attrib {
651 int emulate_model_alias;
653 int emulate_fua_write;
654 int emulate_fua_read;
655 int emulate_write_cache;
656 int emulate_ua_intlck_ctrl;
663 enum target_prot_type pi_prot_type;
664 enum target_prot_type hw_pi_prot_type;
665 int enforce_pr_isids;
668 int emulate_rest_reord;
675 u32 max_unmap_lba_count;
676 u32 max_unmap_block_desc_count;
677 u32 unmap_granularity;
678 u32 unmap_granularity_alignment;
679 u32 max_write_same_len;
680 u32 max_bytes_per_io;
681 struct se_device *da_dev;
682 struct config_group da_group;
685 struct se_port_stat_grps {
686 struct config_group stat_group;
687 struct config_group scsi_port_group;
688 struct config_group scsi_tgt_port_group;
689 struct config_group scsi_transport_group;
692 struct scsi_port_stats {
693 atomic_long_t cmd_pdus;
694 atomic_long_t tx_data_octets;
695 atomic_long_t rx_data_octets;
700 #define SE_LUN_LINK_MAGIC 0xffff7771
706 /* RELATIVE TARGET PORT IDENTIFER */
708 atomic_t lun_acl_count;
709 struct se_device __rcu *lun_se_dev;
711 struct list_head lun_deve_list;
712 spinlock_t lun_deve_lock;
715 int lun_tg_pt_secondary_stat;
716 int lun_tg_pt_secondary_write_md;
717 atomic_t lun_tg_pt_secondary_offline;
718 struct mutex lun_tg_pt_md_mutex;
720 /* ALUA target port group linkage */
721 struct list_head lun_tg_pt_gp_link;
722 struct t10_alua_tg_pt_gp *lun_tg_pt_gp;
723 spinlock_t lun_tg_pt_gp_lock;
725 struct se_portal_group *lun_tpg;
726 struct scsi_port_stats lun_stats;
727 struct config_group lun_group;
728 struct se_port_stat_grps port_stat_grps;
729 struct completion lun_ref_comp;
730 struct percpu_ref lun_ref;
731 struct list_head lun_dev_link;
732 struct hlist_node link;
733 struct rcu_head rcu_head;
736 struct se_dev_stat_grps {
737 struct config_group stat_group;
738 struct config_group scsi_dev_group;
739 struct config_group scsi_tgt_dev_group;
740 struct config_group scsi_lu_group;
744 #define SE_DEV_LINK_MAGIC 0xfeeddeef
746 /* RELATIVE TARGET PORT IDENTIFER Counter */
747 u16 dev_rpti_counter;
748 /* Used for SAM Task Attribute ordering */
749 u32 dev_cur_ordered_id;
751 #define DF_CONFIGURED 0x00000001
752 #define DF_FIRMWARE_VPD_UNIT_SERIAL 0x00000002
753 #define DF_EMULATED_VPD_UNIT_SERIAL 0x00000004
754 #define DF_USING_UDEV_PATH 0x00000008
755 #define DF_USING_ALIAS 0x00000010
756 /* Physical device queue depth */
758 /* Used for SPC-2 reservations enforce of ISIDs */
759 u64 dev_res_bin_isid;
760 /* Pointer to transport specific device structure */
763 atomic_long_t num_resets;
764 atomic_long_t num_cmds;
765 atomic_long_t read_bytes;
766 atomic_long_t write_bytes;
767 /* Active commands on this virtual SE device */
768 atomic_t simple_cmds;
769 atomic_t dev_ordered_id;
770 atomic_t dev_ordered_sync;
771 atomic_t dev_qf_count;
773 spinlock_t delayed_cmd_lock;
774 spinlock_t execute_task_lock;
775 spinlock_t dev_reservation_lock;
776 unsigned int dev_reservation_flags;
777 #define DRF_SPC2_RESERVATIONS 0x00000001
778 #define DRF_SPC2_RESERVATIONS_WITH_ISID 0x00000002
779 spinlock_t se_port_lock;
780 spinlock_t se_tmr_lock;
781 spinlock_t qf_cmd_lock;
782 struct semaphore caw_sem;
783 /* Used for legacy SPC-2 reservationsa */
784 struct se_node_acl *dev_reserved_node_acl;
785 /* Used for ALUA Logical Unit Group membership */
786 struct t10_alua_lu_gp_member *dev_alua_lu_gp_mem;
787 /* Used for SPC-3 Persistent Reservations */
788 struct t10_pr_registration *dev_pr_res_holder;
789 struct list_head dev_sep_list;
790 struct list_head dev_tmr_list;
791 struct workqueue_struct *tmr_wq;
792 struct work_struct qf_work_queue;
793 struct list_head delayed_cmd_list;
794 struct list_head state_list;
795 struct list_head qf_cmd_list;
796 struct list_head g_dev_node;
797 /* Pointer to associated SE HBA */
798 struct se_hba *se_hba;
799 /* T10 Inquiry and VPD WWN Information */
800 struct t10_wwn t10_wwn;
801 /* T10 Asymmetric Logical Unit Assignment for Target Ports */
802 struct t10_alua t10_alua;
803 /* T10 SPC-2 + SPC-3 Reservations */
804 struct t10_reservation t10_pr;
805 struct se_dev_attrib dev_attrib;
806 struct config_group dev_group;
807 struct config_group dev_pr_group;
808 struct se_dev_stat_grps dev_stat_grps;
809 #define SE_DEV_ALIAS_LEN 512 /* must be less than PAGE_SIZE */
810 unsigned char dev_alias[SE_DEV_ALIAS_LEN];
811 #define SE_UDEV_PATH_LEN 512 /* must be less than PAGE_SIZE */
812 unsigned char udev_path[SE_UDEV_PATH_LEN];
813 /* Pointer to template of function pointers for transport */
814 const struct target_backend_ops *transport;
815 /* Linked list for struct se_hba struct se_device list */
816 struct list_head dev_list;
817 struct se_lun xcopy_lun;
818 /* Protection Information */
820 /* For se_lun->lun_se_dev RCU read-side critical access */
822 struct rcu_head rcu_head;
828 /* See hba_flags_table */
830 /* Virtual iSCSI devices attached. */
833 /* Pointer to transport specific host structure. */
835 struct list_head hba_node;
836 spinlock_t device_lock;
837 struct config_group hba_group;
838 struct mutex hba_access_mutex;
839 struct target_backend *backend;
843 struct se_portal_group *tpg_np_parent;
844 struct config_group tpg_np_group;
847 struct se_portal_group {
849 * PROTOCOL IDENTIFIER value per SPC4, 7.5.1.
851 * Negative values can be used by fabric drivers for internal use TPGs.
854 /* Number of ACLed Initiator Nodes for this TPG */
856 /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
857 atomic_t tpg_pr_ref_count;
858 /* Spinlock for adding/removing ACLed Nodes */
859 struct mutex acl_node_mutex;
860 /* Spinlock for adding/removing sessions */
861 spinlock_t session_lock;
862 struct mutex tpg_lun_mutex;
863 struct list_head se_tpg_node;
864 /* linked list for initiator ACL list */
865 struct list_head acl_node_list;
866 struct hlist_head tpg_lun_hlist;
867 struct se_lun *tpg_virt_lun0;
868 /* List of TCM sessions associated wth this TPG */
869 struct list_head tpg_sess_list;
870 /* Pointer to $FABRIC_MOD dependent code */
871 const struct target_core_fabric_ops *se_tpg_tfo;
872 struct se_wwn *se_tpg_wwn;
873 struct config_group tpg_group;
874 struct config_group *tpg_default_groups[7];
875 struct config_group tpg_lun_group;
876 struct config_group tpg_np_group;
877 struct config_group tpg_acl_group;
878 struct config_group tpg_attrib_group;
879 struct config_group tpg_auth_group;
880 struct config_group tpg_param_group;
884 struct target_fabric_configfs *wwn_tf;
885 struct config_group wwn_group;
886 struct config_group *wwn_default_groups[2];
887 struct config_group fabric_stat_group;
890 static inline void atomic_inc_mb(atomic_t *v)
892 smp_mb__before_atomic();
894 smp_mb__after_atomic();
897 static inline void atomic_dec_mb(atomic_t *v)
899 smp_mb__before_atomic();
901 smp_mb__after_atomic();
904 #endif /* TARGET_CORE_BASE_H */