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 <linux/t10-pi.h>
13 #define TARGET_CORE_VERSION "v5.0"
16 * Maximum size of a CDB that can be stored in se_cmd without allocating
17 * memory dynamically for the CDB.
19 #define TCM_MAX_COMMAND_SIZE 32
21 * From include/scsi/scsi_cmnd.h:SCSI_SENSE_BUFFERSIZE, currently
22 * defined 96, but the real limit is 252 (or 260 including the header)
24 #define TRANSPORT_SENSE_BUFFER 96
25 /* Used by transport_send_check_condition_and_sense() */
26 #define SPC_SENSE_KEY_OFFSET 2
27 #define SPC_ADD_SENSE_LEN_OFFSET 7
28 #define SPC_DESC_TYPE_OFFSET 8
29 #define SPC_ADDITIONAL_DESC_LEN_OFFSET 9
30 #define SPC_VALIDITY_OFFSET 10
31 #define SPC_ASC_KEY_OFFSET 12
32 #define SPC_ASCQ_KEY_OFFSET 13
33 #define TRANSPORT_IQN_LEN 224
34 /* Used by target_core_store_alua_lu_gp() and target_core_alua_lu_gp_show_attr_members() */
35 #define LU_GROUP_NAME_BUF 256
36 /* Used by core_alua_store_tg_pt_gp_info() and target_core_alua_tg_pt_gp_show_attr_members() */
37 #define TG_PT_GROUP_NAME_BUF 256
38 /* Used to parse VPD into struct t10_vpd */
39 #define VPD_TMP_BUF_SIZE 254
40 /* Used by transport_generic_cmd_sequencer() */
41 #define READ_BLOCK_LEN 6
42 #define READ_CAP_LEN 8
43 #define READ_POSITION_LEN 20
44 #define INQUIRY_LEN 36
45 /* Used by transport_get_inquiry_vpd_serial() */
46 #define INQUIRY_VPD_SERIAL_LEN 254
47 /* Used by transport_get_inquiry_vpd_device_ident() */
48 #define INQUIRY_VPD_DEVICE_IDENTIFIER_LEN 254
50 /* Attempts before moving from SHORT to LONG */
51 #define PYX_TRANSPORT_WINDOW_CLOSED_THRESHOLD 3
52 #define PYX_TRANSPORT_WINDOW_CLOSED_WAIT_SHORT 3 /* In milliseconds */
53 #define PYX_TRANSPORT_WINDOW_CLOSED_WAIT_LONG 10 /* In milliseconds */
55 #define PYX_TRANSPORT_STATUS_INTERVAL 5 /* In seconds */
57 /* struct se_dev_attrib sanity values */
58 /* Default max_unmap_lba_count */
59 #define DA_MAX_UNMAP_LBA_COUNT 0
60 /* Default max_unmap_block_desc_count */
61 #define DA_MAX_UNMAP_BLOCK_DESC_COUNT 0
62 /* Default unmap_granularity */
63 #define DA_UNMAP_GRANULARITY_DEFAULT 0
64 /* Default unmap_granularity_alignment */
65 #define DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT 0
66 /* Default max_write_same_len, disabled by default */
67 #define DA_MAX_WRITE_SAME_LEN 0
68 /* Use a model alias based on the configfs backend device name */
69 #define DA_EMULATE_MODEL_ALIAS 0
70 /* Emulation for WriteCache and SYNCHRONIZE_CACHE */
71 #define DA_EMULATE_WRITE_CACHE 0
72 /* Emulation for UNIT ATTENTION Interlock Control */
73 #define DA_EMULATE_UA_INTLLCK_CTRL 0
74 /* Emulation for TASK_ABORTED status (TAS) by default */
75 #define DA_EMULATE_TAS 1
76 /* Emulation for Thin Provisioning UNMAP using block/blk-lib.c:blkdev_issue_discard() */
77 #define DA_EMULATE_TPU 0
79 * Emulation for Thin Provisioning WRITE_SAME w/ UNMAP=1 bit using
80 * block/blk-lib.c:blkdev_issue_discard()
82 #define DA_EMULATE_TPWS 0
83 /* Emulation for CompareAndWrite (AtomicTestandSet) by default */
84 #define DA_EMULATE_CAW 1
85 /* Emulation for 3rd Party Copy (ExtendedCopy) by default */
86 #define DA_EMULATE_3PC 1
87 /* No Emulation for PSCSI by default */
88 #define DA_EMULATE_ALUA 0
89 /* Enforce SCSI Initiator Port TransportID with 'ISID' for PR */
90 #define DA_ENFORCE_PR_ISIDS 1
91 /* Force SPC-3 PR Activate Persistence across Target Power Loss */
92 #define DA_FORCE_PR_APTPL 0
93 #define DA_STATUS_MAX_SECTORS_MIN 16
94 #define DA_STATUS_MAX_SECTORS_MAX 8192
95 /* By default don't report non-rotating (solid state) medium */
96 #define DA_IS_NONROT 0
97 /* Queue Algorithm Modifier default for restricted reordering in control mode page */
98 #define DA_EMULATE_REST_REORD 0
100 #define SE_INQUIRY_BUF 1024
101 #define SE_MODE_PAGE_BUF 512
102 #define SE_SENSE_BUF 96
104 /* struct se_hba->hba_flags */
105 enum hba_flags_table {
106 HBA_FLAGS_INTERNAL_USE = 0x01,
107 HBA_FLAGS_PSCSI_MODE = 0x02,
110 /* Special transport agnostic struct se_cmd->t_states */
111 enum transport_state_table {
112 TRANSPORT_NO_STATE = 0,
113 TRANSPORT_NEW_CMD = 1,
114 TRANSPORT_WRITE_PENDING = 3,
115 TRANSPORT_PROCESSING = 5,
116 TRANSPORT_COMPLETE = 6,
117 TRANSPORT_ISTATE_PROCESSING = 11,
118 TRANSPORT_COMPLETE_QF_WP = 18,
119 TRANSPORT_COMPLETE_QF_OK = 19,
122 /* Used for struct se_cmd->se_cmd_flags */
123 enum se_cmd_flags_table {
124 SCF_SUPPORTED_SAM_OPCODE = 0x00000001,
125 SCF_TRANSPORT_TASK_SENSE = 0x00000002,
126 SCF_EMULATED_TASK_SENSE = 0x00000004,
127 SCF_SCSI_DATA_CDB = 0x00000008,
128 SCF_SCSI_TMR_CDB = 0x00000010,
129 SCF_FUA = 0x00000080,
130 SCF_SE_LUN_CMD = 0x00000100,
131 SCF_BIDI = 0x00000400,
132 SCF_SENT_CHECK_CONDITION = 0x00000800,
133 SCF_OVERFLOW_BIT = 0x00001000,
134 SCF_UNDERFLOW_BIT = 0x00002000,
135 SCF_SEND_DELAYED_TAS = 0x00004000,
136 SCF_ALUA_NON_OPTIMIZED = 0x00008000,
137 SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC = 0x00020000,
138 SCF_COMPARE_AND_WRITE = 0x00080000,
139 SCF_COMPARE_AND_WRITE_POST = 0x00100000,
140 SCF_PASSTHROUGH_PROT_SG_TO_MEM_NOALLOC = 0x00200000,
143 /* struct se_dev_entry->lun_flags and struct se_lun->lun_access */
144 enum transport_lunflags_table {
145 TRANSPORT_LUNFLAGS_READ_ONLY = 0x01,
146 TRANSPORT_LUNFLAGS_READ_WRITE = 0x02,
150 * Used by transport_send_check_condition_and_sense()
151 * to signal which ASC/ASCQ sense payload should be built.
153 typedef unsigned __bitwise__ sense_reason_t;
155 enum tcm_sense_reason_table {
156 #define R(x) (__force sense_reason_t )(x)
157 TCM_NO_SENSE = R(0x00),
158 TCM_NON_EXISTENT_LUN = R(0x01),
159 TCM_UNSUPPORTED_SCSI_OPCODE = R(0x02),
160 TCM_INCORRECT_AMOUNT_OF_DATA = R(0x03),
161 TCM_UNEXPECTED_UNSOLICITED_DATA = R(0x04),
162 TCM_SERVICE_CRC_ERROR = R(0x05),
163 TCM_SNACK_REJECTED = R(0x06),
164 TCM_SECTOR_COUNT_TOO_MANY = R(0x07),
165 TCM_INVALID_CDB_FIELD = R(0x08),
166 TCM_INVALID_PARAMETER_LIST = R(0x09),
167 TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE = R(0x0a),
168 TCM_UNKNOWN_MODE_PAGE = R(0x0b),
169 TCM_WRITE_PROTECTED = R(0x0c),
170 TCM_CHECK_CONDITION_ABORT_CMD = R(0x0d),
171 TCM_CHECK_CONDITION_UNIT_ATTENTION = R(0x0e),
172 TCM_CHECK_CONDITION_NOT_READY = R(0x0f),
173 TCM_RESERVATION_CONFLICT = R(0x10),
174 TCM_ADDRESS_OUT_OF_RANGE = R(0x11),
175 TCM_OUT_OF_RESOURCES = R(0x12),
176 TCM_PARAMETER_LIST_LENGTH_ERROR = R(0x13),
177 TCM_MISCOMPARE_VERIFY = R(0x14),
178 TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED = R(0x15),
179 TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED = R(0x16),
180 TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED = R(0x17),
184 enum target_sc_flags_table {
185 TARGET_SCF_BIDI_OP = 0x01,
186 TARGET_SCF_ACK_KREF = 0x02,
187 TARGET_SCF_UNKNOWN_SIZE = 0x04,
190 /* fabric independent task management function values */
191 enum tcm_tmreq_table {
193 TMR_ABORT_TASK_SET = 2,
195 TMR_CLEAR_TASK_SET = 4,
197 TMR_TARGET_WARM_RESET = 6,
198 TMR_TARGET_COLD_RESET = 7,
201 /* fabric independent task management response values */
202 enum tcm_tmrsp_table {
203 TMR_FUNCTION_FAILED = 0,
204 TMR_FUNCTION_COMPLETE = 1,
205 TMR_TASK_DOES_NOT_EXIST = 2,
206 TMR_LUN_DOES_NOT_EXIST = 3,
207 TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED = 4,
208 TMR_FUNCTION_REJECTED = 5,
212 * Used for target SCSI statistics
217 SCSI_AUTH_INTR_INDEX,
223 struct t10_alua_lba_map_member {
224 struct list_head lba_map_mem_list;
225 int lba_map_mem_alua_state;
226 int lba_map_mem_alua_pg_id;
229 struct t10_alua_lba_map {
230 u64 lba_map_first_lba;
231 u64 lba_map_last_lba;
232 struct list_head lba_map_list;
233 struct list_head lba_map_mem_list;
237 /* ALUA Target Port Group ID */
238 u16 alua_tg_pt_gps_counter;
239 u32 alua_tg_pt_gps_count;
240 /* Referrals support */
241 spinlock_t lba_map_lock;
242 u32 lba_map_segment_size;
243 u32 lba_map_segment_multiplier;
244 struct list_head lba_map_list;
245 spinlock_t tg_pt_gps_lock;
246 struct se_device *t10_dev;
247 /* Used for default ALUA Target Port Group */
248 struct t10_alua_tg_pt_gp *default_tg_pt_gp;
249 /* Used for default ALUA Target Port Group ConfigFS group */
250 struct config_group alua_tg_pt_gps_group;
251 struct list_head tg_pt_gps_list;
254 struct t10_alua_lu_gp {
258 atomic_t lu_gp_ref_cnt;
259 spinlock_t lu_gp_lock;
260 struct config_group lu_gp_group;
261 struct list_head lu_gp_node;
262 struct list_head lu_gp_mem_list;
265 struct t10_alua_lu_gp_member {
267 atomic_t lu_gp_mem_ref_cnt;
268 spinlock_t lu_gp_mem_lock;
269 struct t10_alua_lu_gp *lu_gp;
270 struct se_device *lu_gp_mem_dev;
271 struct list_head lu_gp_mem_list;
274 struct t10_alua_tg_pt_gp {
276 int tg_pt_gp_valid_id;
277 int tg_pt_gp_alua_supported_states;
278 int tg_pt_gp_alua_pending_state;
279 int tg_pt_gp_alua_previous_state;
280 int tg_pt_gp_alua_access_status;
281 int tg_pt_gp_alua_access_type;
282 int tg_pt_gp_nonop_delay_msecs;
283 int tg_pt_gp_trans_delay_msecs;
284 int tg_pt_gp_implicit_trans_secs;
286 int tg_pt_gp_write_metadata;
287 u32 tg_pt_gp_members;
288 atomic_t tg_pt_gp_alua_access_state;
289 atomic_t tg_pt_gp_ref_cnt;
290 spinlock_t tg_pt_gp_lock;
291 struct mutex tg_pt_gp_md_mutex;
292 struct se_device *tg_pt_gp_dev;
293 struct config_group tg_pt_gp_group;
294 struct list_head tg_pt_gp_list;
295 struct list_head tg_pt_gp_lun_list;
296 struct se_lun *tg_pt_gp_alua_lun;
297 struct se_node_acl *tg_pt_gp_alua_nacl;
298 struct delayed_work tg_pt_gp_transition_work;
299 struct completion *tg_pt_gp_transition_complete;
303 unsigned char device_identifier[INQUIRY_VPD_DEVICE_IDENTIFIER_LEN];
304 int protocol_identifier_set;
305 u32 protocol_identifier;
306 u32 device_identifier_code_set;
308 u32 device_identifier_type;
309 struct list_head vpd_list;
316 char unit_serial[INQUIRY_VPD_SERIAL_LEN];
317 spinlock_t t10_vpd_lock;
318 struct se_device *t10_dev;
319 struct config_group t10_wwn_group;
320 struct list_head t10_vpd_list;
323 struct t10_pr_registration {
324 /* Used for fabrics that contain WWN+ISID */
325 #define PR_REG_ISID_LEN 16
326 /* PR_REG_ISID_LEN + ',i,0x' */
327 #define PR_REG_ISID_ID_LEN (PR_REG_ISID_LEN + 5)
328 char pr_reg_isid[PR_REG_ISID_LEN];
329 /* Used during APTPL metadata reading */
330 #define PR_APTPL_MAX_IPORT_LEN 256
331 unsigned char pr_iport[PR_APTPL_MAX_IPORT_LEN];
332 /* Used during APTPL metadata reading */
333 #define PR_APTPL_MAX_TPORT_LEN 256
334 unsigned char pr_tport[PR_APTPL_MAX_TPORT_LEN];
337 /* Reservation effects all target ports */
338 int pr_reg_all_tg_pt;
339 /* Activate Persistence across Target Power Loss */
344 /* Used for fabric initiator WWPNs using a ISID */
345 bool isid_present_at_reg;
346 u64 pr_res_mapped_lun;
347 u64 pr_aptpl_target_lun;
349 u32 pr_res_generation;
352 atomic_t pr_res_holders;
353 struct se_node_acl *pr_reg_nacl;
354 /* Used by ALL_TG_PT=1 registration with deve->pr_ref taken */
355 struct se_dev_entry *pr_reg_deve;
356 struct list_head pr_reg_list;
357 struct list_head pr_reg_abort_list;
358 struct list_head pr_reg_aptpl_list;
359 struct list_head pr_reg_atp_list;
360 struct list_head pr_reg_atp_mem_list;
363 struct t10_reservation {
364 /* Reservation effects all target ports */
366 /* Activate Persistence across Target Power Loss enabled
369 #define PR_APTPL_BUF_LEN 262144
371 spinlock_t registration_lock;
372 spinlock_t aptpl_reg_lock;
374 * This will always be set by one individual I_T Nexus.
375 * However with all_tg_pt=1, other I_T Nexus from the
376 * same initiator can access PR reg/res info on a different
379 * There is also the 'All Registrants' case, where there is
380 * a single *pr_res_holder of the reservation, but all
381 * registrations are considered reservation holders.
383 struct se_node_acl *pr_res_holder;
384 struct list_head registration_list;
385 struct list_head aptpl_reg_list;
389 /* Task Management function to be performed */
391 /* Task Management response to send */
394 /* Reference to ITT that Task Mgmt should be performed */
396 void *fabric_tmr_ptr;
397 struct se_cmd *task_cmd;
398 struct se_device *tmr_dev;
399 struct se_lun *tmr_lun;
400 struct list_head tmr_list;
403 enum target_prot_op {
404 TARGET_PROT_NORMAL = 0,
405 TARGET_PROT_DIN_INSERT = (1 << 0),
406 TARGET_PROT_DOUT_INSERT = (1 << 1),
407 TARGET_PROT_DIN_STRIP = (1 << 2),
408 TARGET_PROT_DOUT_STRIP = (1 << 3),
409 TARGET_PROT_DIN_PASS = (1 << 4),
410 TARGET_PROT_DOUT_PASS = (1 << 5),
413 #define TARGET_PROT_ALL TARGET_PROT_DIN_INSERT | TARGET_PROT_DOUT_INSERT | \
414 TARGET_PROT_DIN_STRIP | TARGET_PROT_DOUT_STRIP | \
415 TARGET_PROT_DIN_PASS | TARGET_PROT_DOUT_PASS
417 enum target_prot_type {
418 TARGET_DIF_TYPE0_PROT,
419 TARGET_DIF_TYPE1_PROT,
420 TARGET_DIF_TYPE2_PROT,
421 TARGET_DIF_TYPE3_PROT,
424 enum target_core_dif_check {
425 TARGET_DIF_CHECK_GUARD = 0x1 << 0,
426 TARGET_DIF_CHECK_APPTAG = 0x1 << 1,
427 TARGET_DIF_CHECK_REFTAG = 0x1 << 2,
430 /* for sam_task_attr */
431 #define TCM_SIMPLE_TAG 0x20
432 #define TCM_HEAD_TAG 0x21
433 #define TCM_ORDERED_TAG 0x22
434 #define TCM_ACA_TAG 0x24
437 /* SAM response code being sent to initiator */
441 u16 scsi_sense_length;
442 u64 tag; /* SAM command identifier aka task tag */
443 /* Delay for ALUA Active/NonOptimized state access in milliseconds */
444 int alua_nonop_delay;
445 /* See include/linux/dma-mapping.h */
446 enum dma_data_direction data_direction;
447 /* For SAM Task Attribute */
449 /* Used for se_sess->sess_tag_pool */
450 unsigned int map_tag;
451 /* Transport protocol dependent state, see transport_state_table */
452 enum transport_state_table t_state;
453 unsigned cmd_wait_set:1;
454 unsigned unknown_data_length:1;
455 /* See se_cmd_flags_table */
458 /* Total size in bytes associated with command */
462 /* Persistent Reservation key */
464 /* Used for sense data */
466 struct list_head se_delayed_node;
467 struct list_head se_qf_node;
468 struct se_device *se_dev;
469 struct se_lun *se_lun;
470 /* Only used for internal passthrough and legacy TCM fabric modules */
471 struct se_session *se_sess;
472 struct se_tmr_req *se_tmr_req;
473 struct list_head se_cmd_list;
474 struct completion cmd_wait_comp;
475 struct kref cmd_kref;
476 const struct target_core_fabric_ops *se_tfo;
477 sense_reason_t (*execute_cmd)(struct se_cmd *);
478 sense_reason_t (*transport_complete_callback)(struct se_cmd *, bool);
481 unsigned char *t_task_cdb;
482 unsigned char __t_task_cdb[TCM_MAX_COMMAND_SIZE];
483 unsigned long long t_task_lba;
484 unsigned int t_task_nolb;
485 unsigned int transport_state;
486 #define CMD_T_ABORTED (1 << 0)
487 #define CMD_T_ACTIVE (1 << 1)
488 #define CMD_T_COMPLETE (1 << 2)
489 #define CMD_T_SENT (1 << 4)
490 #define CMD_T_STOP (1 << 5)
491 #define CMD_T_DEV_ACTIVE (1 << 7)
492 #define CMD_T_REQUEST_STOP (1 << 8)
493 #define CMD_T_BUSY (1 << 9)
494 spinlock_t t_state_lock;
495 struct completion t_transport_stop_comp;
497 struct work_struct work;
499 struct scatterlist *t_data_sg;
500 struct scatterlist *t_data_sg_orig;
501 unsigned int t_data_nents;
502 unsigned int t_data_nents_orig;
504 struct scatterlist *t_bidi_data_sg;
505 unsigned int t_bidi_data_nents;
507 struct list_head state_list;
510 /* old task stop completion, consider merging with some of the above */
511 struct completion task_stop_comp;
513 /* backend private data */
516 /* Used for lun->lun_ref counting */
519 /* DIF related members */
520 enum target_prot_op prot_op;
521 enum target_prot_type prot_type;
525 struct scatterlist *t_prot_sg;
526 unsigned int t_prot_nents;
527 sense_reason_t pi_err;
535 struct list_head ua_nacl_list;
539 char initiatorname[TRANSPORT_IQN_LEN];
540 /* Used to signal demo mode created ACL, disabled by default */
541 bool dynamic_node_acl;
545 enum target_prot_type saved_prot_type;
546 #define MAX_ACL_TAG_SIZE 64
547 char acl_tag[MAX_ACL_TAG_SIZE];
548 /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
549 atomic_t acl_pr_ref_count;
550 struct hlist_head lun_entry_hlist;
551 struct se_session *nacl_sess;
552 struct se_portal_group *se_tpg;
553 struct mutex lun_entry_mutex;
554 spinlock_t nacl_sess_lock;
555 struct config_group acl_group;
556 struct config_group acl_attrib_group;
557 struct config_group acl_auth_group;
558 struct config_group acl_param_group;
559 struct config_group acl_fabric_stat_group;
560 struct config_group *acl_default_groups[5];
561 struct list_head acl_list;
562 struct list_head acl_sess_list;
563 struct completion acl_free_comp;
564 struct kref acl_kref;
568 unsigned sess_tearing_down:1;
570 enum target_prot_op sup_prot_ops;
571 enum target_prot_type sess_prot_type;
572 struct se_node_acl *se_node_acl;
573 struct se_portal_group *se_tpg;
574 void *fabric_sess_ptr;
575 struct list_head sess_list;
576 struct list_head sess_acl_list;
577 struct list_head sess_cmd_list;
578 struct list_head sess_wait_list;
579 spinlock_t sess_cmd_lock;
580 struct kref sess_kref;
582 struct percpu_ida sess_tag_pool;
586 struct se_transform_info;
589 struct se_ml_stat_grps {
590 struct config_group stat_group;
591 struct config_group scsi_auth_intr_group;
592 struct config_group scsi_att_intr_port_group;
596 char initiatorname[TRANSPORT_IQN_LEN];
598 struct se_node_acl *se_lun_nacl;
599 struct se_lun *se_lun;
600 struct config_group se_lun_group;
601 struct se_ml_stat_grps ml_stat_grps;
604 struct se_dev_entry {
605 /* See transport_lunflags_table */
611 atomic_long_t total_cmds;
612 atomic_long_t read_bytes;
613 atomic_long_t write_bytes;
615 /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
617 struct completion pr_comp;
618 struct se_lun_acl __rcu *se_lun_acl;
620 struct se_lun __rcu *se_lun;
621 #define DEF_PR_REG_ACTIVE 1
622 unsigned long deve_flags;
623 struct list_head alua_port_list;
624 struct list_head lun_link;
625 struct list_head ua_list;
626 struct hlist_node link;
627 struct rcu_head rcu_head;
630 struct se_dev_attrib {
631 int emulate_model_alias;
633 int emulate_fua_write;
634 int emulate_fua_read;
635 int emulate_write_cache;
636 int emulate_ua_intlck_ctrl;
643 enum target_prot_type pi_prot_type;
644 enum target_prot_type hw_pi_prot_type;
645 int enforce_pr_isids;
648 int emulate_rest_reord;
655 u32 max_unmap_lba_count;
656 u32 max_unmap_block_desc_count;
657 u32 unmap_granularity;
658 u32 unmap_granularity_alignment;
659 u32 max_write_same_len;
660 u32 max_bytes_per_io;
661 struct se_device *da_dev;
662 struct config_group da_group;
665 struct se_port_stat_grps {
666 struct config_group stat_group;
667 struct config_group scsi_port_group;
668 struct config_group scsi_tgt_port_group;
669 struct config_group scsi_transport_group;
672 struct scsi_port_stats {
673 atomic_long_t cmd_pdus;
674 atomic_long_t tx_data_octets;
675 atomic_long_t rx_data_octets;
680 #define SE_LUN_LINK_MAGIC 0xffff7771
685 /* RELATIVE TARGET PORT IDENTIFER */
687 atomic_t lun_acl_count;
688 struct se_device __rcu *lun_se_dev;
690 struct list_head lun_deve_list;
691 spinlock_t lun_deve_lock;
694 int lun_tg_pt_secondary_stat;
695 int lun_tg_pt_secondary_write_md;
696 atomic_t lun_tg_pt_secondary_offline;
697 struct mutex lun_tg_pt_md_mutex;
699 /* ALUA target port group linkage */
700 struct list_head lun_tg_pt_gp_link;
701 struct t10_alua_tg_pt_gp *lun_tg_pt_gp;
702 spinlock_t lun_tg_pt_gp_lock;
704 struct se_portal_group *lun_tpg;
705 struct scsi_port_stats lun_stats;
706 struct config_group lun_group;
707 struct se_port_stat_grps port_stat_grps;
708 struct completion lun_ref_comp;
709 struct percpu_ref lun_ref;
710 struct list_head lun_dev_link;
711 struct hlist_node link;
712 struct rcu_head rcu_head;
715 struct se_dev_stat_grps {
716 struct config_group stat_group;
717 struct config_group scsi_dev_group;
718 struct config_group scsi_tgt_dev_group;
719 struct config_group scsi_lu_group;
723 #define SE_DEV_LINK_MAGIC 0xfeeddeef
725 /* RELATIVE TARGET PORT IDENTIFER Counter */
726 u16 dev_rpti_counter;
727 /* Used for SAM Task Attribute ordering */
728 u32 dev_cur_ordered_id;
730 #define DF_CONFIGURED 0x00000001
731 #define DF_FIRMWARE_VPD_UNIT_SERIAL 0x00000002
732 #define DF_EMULATED_VPD_UNIT_SERIAL 0x00000004
733 #define DF_USING_UDEV_PATH 0x00000008
734 #define DF_USING_ALIAS 0x00000010
735 /* Physical device queue depth */
737 /* Used for SPC-2 reservations enforce of ISIDs */
738 u64 dev_res_bin_isid;
739 /* Pointer to transport specific device structure */
742 atomic_long_t num_resets;
743 atomic_long_t num_cmds;
744 atomic_long_t read_bytes;
745 atomic_long_t write_bytes;
746 /* Active commands on this virtual SE device */
747 atomic_t simple_cmds;
748 atomic_t dev_ordered_id;
749 atomic_t dev_ordered_sync;
750 atomic_t dev_qf_count;
752 spinlock_t delayed_cmd_lock;
753 spinlock_t execute_task_lock;
754 spinlock_t dev_reservation_lock;
755 unsigned int dev_reservation_flags;
756 #define DRF_SPC2_RESERVATIONS 0x00000001
757 #define DRF_SPC2_RESERVATIONS_WITH_ISID 0x00000002
758 spinlock_t se_port_lock;
759 spinlock_t se_tmr_lock;
760 spinlock_t qf_cmd_lock;
761 struct semaphore caw_sem;
762 /* Used for legacy SPC-2 reservationsa */
763 struct se_node_acl *dev_reserved_node_acl;
764 /* Used for ALUA Logical Unit Group membership */
765 struct t10_alua_lu_gp_member *dev_alua_lu_gp_mem;
766 /* Used for SPC-3 Persistent Reservations */
767 struct t10_pr_registration *dev_pr_res_holder;
768 struct list_head dev_sep_list;
769 struct list_head dev_tmr_list;
770 struct workqueue_struct *tmr_wq;
771 struct work_struct qf_work_queue;
772 struct list_head delayed_cmd_list;
773 struct list_head state_list;
774 struct list_head qf_cmd_list;
775 struct list_head g_dev_node;
776 /* Pointer to associated SE HBA */
777 struct se_hba *se_hba;
778 /* T10 Inquiry and VPD WWN Information */
779 struct t10_wwn t10_wwn;
780 /* T10 Asymmetric Logical Unit Assignment for Target Ports */
781 struct t10_alua t10_alua;
782 /* T10 SPC-2 + SPC-3 Reservations */
783 struct t10_reservation t10_pr;
784 struct se_dev_attrib dev_attrib;
785 struct config_group dev_group;
786 struct config_group dev_pr_group;
787 struct se_dev_stat_grps dev_stat_grps;
788 #define SE_DEV_ALIAS_LEN 512 /* must be less than PAGE_SIZE */
789 unsigned char dev_alias[SE_DEV_ALIAS_LEN];
790 #define SE_UDEV_PATH_LEN 512 /* must be less than PAGE_SIZE */
791 unsigned char udev_path[SE_UDEV_PATH_LEN];
792 /* Pointer to template of function pointers for transport */
793 const struct target_backend_ops *transport;
794 /* Linked list for struct se_hba struct se_device list */
795 struct list_head dev_list;
796 struct se_lun xcopy_lun;
797 /* Protection Information */
799 /* For se_lun->lun_se_dev RCU read-side critical access */
801 struct rcu_head rcu_head;
807 /* See hba_flags_table */
809 /* Virtual iSCSI devices attached. */
812 /* Pointer to transport specific host structure. */
814 struct list_head hba_node;
815 spinlock_t device_lock;
816 struct config_group hba_group;
817 struct mutex hba_access_mutex;
818 struct target_backend *backend;
822 struct se_portal_group *tpg_np_parent;
823 struct config_group tpg_np_group;
826 struct se_portal_group {
828 * PROTOCOL IDENTIFIER value per SPC4, 7.5.1.
830 * Negative values can be used by fabric drivers for internal use TPGs.
833 /* Number of ACLed Initiator Nodes for this TPG */
835 /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
836 atomic_t tpg_pr_ref_count;
837 /* Spinlock for adding/removing ACLed Nodes */
838 struct mutex acl_node_mutex;
839 /* Spinlock for adding/removing sessions */
840 spinlock_t session_lock;
841 struct mutex tpg_lun_mutex;
842 struct list_head se_tpg_node;
843 /* linked list for initiator ACL list */
844 struct list_head acl_node_list;
845 struct hlist_head tpg_lun_hlist;
846 struct se_lun *tpg_virt_lun0;
847 /* List of TCM sessions associated wth this TPG */
848 struct list_head tpg_sess_list;
849 /* Pointer to $FABRIC_MOD dependent code */
850 const struct target_core_fabric_ops *se_tpg_tfo;
851 struct se_wwn *se_tpg_wwn;
852 struct config_group tpg_group;
853 struct config_group *tpg_default_groups[7];
854 struct config_group tpg_lun_group;
855 struct config_group tpg_np_group;
856 struct config_group tpg_acl_group;
857 struct config_group tpg_attrib_group;
858 struct config_group tpg_auth_group;
859 struct config_group tpg_param_group;
863 struct target_fabric_configfs *wwn_tf;
864 struct config_group wwn_group;
865 struct config_group *wwn_default_groups[2];
866 struct config_group fabric_stat_group;
869 static inline void atomic_inc_mb(atomic_t *v)
871 smp_mb__before_atomic();
873 smp_mb__after_atomic();
876 static inline void atomic_dec_mb(atomic_t *v)
878 smp_mb__before_atomic();
880 smp_mb__after_atomic();
883 #endif /* TARGET_CORE_BASE_H */