1 #ifndef TARGET_CORE_BASE_H
2 #define TARGET_CORE_BASE_H
4 #include <linux/configfs.h> /* struct config_group */
5 #include <linux/dma-direction.h> /* enum dma_data_direction */
6 #include <linux/percpu_ida.h> /* struct percpu_ida */
7 #include <linux/percpu-refcount.h>
8 #include <linux/semaphore.h> /* struct semaphore */
9 #include <linux/completion.h>
11 #define TARGET_CORE_VERSION "v5.0"
14 * Maximum size of a CDB that can be stored in se_cmd without allocating
15 * memory dynamically for the CDB.
17 #define TCM_MAX_COMMAND_SIZE 32
19 * From include/scsi/scsi_cmnd.h:SCSI_SENSE_BUFFERSIZE, currently
20 * defined 96, but the real limit is 252 (or 260 including the header)
22 #define TRANSPORT_SENSE_BUFFER 96
23 /* Used by transport_send_check_condition_and_sense() */
24 #define SPC_SENSE_KEY_OFFSET 2
25 #define SPC_ADD_SENSE_LEN_OFFSET 7
26 #define SPC_DESC_TYPE_OFFSET 8
27 #define SPC_ADDITIONAL_DESC_LEN_OFFSET 9
28 #define SPC_VALIDITY_OFFSET 10
29 #define SPC_ASC_KEY_OFFSET 12
30 #define SPC_ASCQ_KEY_OFFSET 13
31 #define TRANSPORT_IQN_LEN 224
32 /* Used by target_core_store_alua_lu_gp() and target_core_alua_lu_gp_show_attr_members() */
33 #define LU_GROUP_NAME_BUF 256
34 /* Used by core_alua_store_tg_pt_gp_info() and target_core_alua_tg_pt_gp_show_attr_members() */
35 #define TG_PT_GROUP_NAME_BUF 256
36 /* Used to parse VPD into struct t10_vpd */
37 #define VPD_TMP_BUF_SIZE 254
38 /* Used by transport_generic_cmd_sequencer() */
39 #define READ_BLOCK_LEN 6
40 #define READ_CAP_LEN 8
41 #define READ_POSITION_LEN 20
42 #define INQUIRY_LEN 36
43 /* Used by transport_get_inquiry_vpd_serial() */
44 #define INQUIRY_VPD_SERIAL_LEN 254
45 /* Used by transport_get_inquiry_vpd_device_ident() */
46 #define INQUIRY_VPD_DEVICE_IDENTIFIER_LEN 254
48 /* Attempts before moving from SHORT to LONG */
49 #define PYX_TRANSPORT_WINDOW_CLOSED_THRESHOLD 3
50 #define PYX_TRANSPORT_WINDOW_CLOSED_WAIT_SHORT 3 /* In milliseconds */
51 #define PYX_TRANSPORT_WINDOW_CLOSED_WAIT_LONG 10 /* In milliseconds */
53 #define PYX_TRANSPORT_STATUS_INTERVAL 5 /* In seconds */
55 /* struct se_dev_attrib sanity values */
56 /* Default max_unmap_lba_count */
57 #define DA_MAX_UNMAP_LBA_COUNT 0
58 /* Default max_unmap_block_desc_count */
59 #define DA_MAX_UNMAP_BLOCK_DESC_COUNT 0
60 /* Default unmap_granularity */
61 #define DA_UNMAP_GRANULARITY_DEFAULT 0
62 /* Default unmap_granularity_alignment */
63 #define DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT 0
64 /* Default unmap_zeroes_data */
65 #define DA_UNMAP_ZEROES_DATA_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,
141 SCF_ACK_KREF = 0x00400000,
142 SCF_USE_CPUID = 0x00800000,
143 SCF_TASK_ATTR_SET = 0x01000000,
147 * Used by transport_send_check_condition_and_sense()
148 * to signal which ASC/ASCQ sense payload should be built.
150 typedef unsigned __bitwise sense_reason_t;
152 enum tcm_sense_reason_table {
153 #define R(x) (__force sense_reason_t )(x)
154 TCM_NO_SENSE = R(0x00),
155 TCM_NON_EXISTENT_LUN = R(0x01),
156 TCM_UNSUPPORTED_SCSI_OPCODE = R(0x02),
157 TCM_INCORRECT_AMOUNT_OF_DATA = R(0x03),
158 TCM_UNEXPECTED_UNSOLICITED_DATA = R(0x04),
159 TCM_SERVICE_CRC_ERROR = R(0x05),
160 TCM_SNACK_REJECTED = R(0x06),
161 TCM_SECTOR_COUNT_TOO_MANY = R(0x07),
162 TCM_INVALID_CDB_FIELD = R(0x08),
163 TCM_INVALID_PARAMETER_LIST = R(0x09),
164 TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE = R(0x0a),
165 TCM_UNKNOWN_MODE_PAGE = R(0x0b),
166 TCM_WRITE_PROTECTED = R(0x0c),
167 TCM_CHECK_CONDITION_ABORT_CMD = R(0x0d),
168 TCM_CHECK_CONDITION_UNIT_ATTENTION = R(0x0e),
169 TCM_CHECK_CONDITION_NOT_READY = R(0x0f),
170 TCM_RESERVATION_CONFLICT = R(0x10),
171 TCM_ADDRESS_OUT_OF_RANGE = R(0x11),
172 TCM_OUT_OF_RESOURCES = R(0x12),
173 TCM_PARAMETER_LIST_LENGTH_ERROR = R(0x13),
174 TCM_MISCOMPARE_VERIFY = R(0x14),
175 TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED = R(0x15),
176 TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED = R(0x16),
177 TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED = R(0x17),
178 TCM_COPY_TARGET_DEVICE_NOT_REACHABLE = R(0x18),
179 TCM_TOO_MANY_TARGET_DESCS = R(0x19),
180 TCM_UNSUPPORTED_TARGET_DESC_TYPE_CODE = R(0x1a),
181 TCM_TOO_MANY_SEGMENT_DESCS = R(0x1b),
182 TCM_UNSUPPORTED_SEGMENT_DESC_TYPE_CODE = R(0x1c),
186 enum target_sc_flags_table {
187 TARGET_SCF_BIDI_OP = 0x01,
188 TARGET_SCF_ACK_KREF = 0x02,
189 TARGET_SCF_UNKNOWN_SIZE = 0x04,
190 TARGET_SCF_USE_CPUID = 0x08,
193 /* fabric independent task management function values */
194 enum tcm_tmreq_table {
196 TMR_ABORT_TASK_SET = 2,
198 TMR_CLEAR_TASK_SET = 4,
200 TMR_TARGET_WARM_RESET = 6,
201 TMR_TARGET_COLD_RESET = 7,
204 /* fabric independent task management response values */
205 enum tcm_tmrsp_table {
206 TMR_FUNCTION_FAILED = 0,
207 TMR_FUNCTION_COMPLETE = 1,
208 TMR_TASK_DOES_NOT_EXIST = 2,
209 TMR_LUN_DOES_NOT_EXIST = 3,
210 TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED = 4,
211 TMR_FUNCTION_REJECTED = 5,
215 * Used for target SCSI statistics
220 SCSI_AUTH_INTR_INDEX,
226 struct t10_alua_lba_map_member {
227 struct list_head lba_map_mem_list;
228 int lba_map_mem_alua_state;
229 int lba_map_mem_alua_pg_id;
232 struct t10_alua_lba_map {
233 u64 lba_map_first_lba;
234 u64 lba_map_last_lba;
235 struct list_head lba_map_list;
236 struct list_head lba_map_mem_list;
240 /* ALUA Target Port Group ID */
241 u16 alua_tg_pt_gps_counter;
242 u32 alua_tg_pt_gps_count;
243 /* Referrals support */
244 spinlock_t lba_map_lock;
245 u32 lba_map_segment_size;
246 u32 lba_map_segment_multiplier;
247 struct list_head lba_map_list;
248 spinlock_t tg_pt_gps_lock;
249 struct se_device *t10_dev;
250 /* Used for default ALUA Target Port Group */
251 struct t10_alua_tg_pt_gp *default_tg_pt_gp;
252 /* Used for default ALUA Target Port Group ConfigFS group */
253 struct config_group alua_tg_pt_gps_group;
254 struct list_head tg_pt_gps_list;
257 struct t10_alua_lu_gp {
261 atomic_t lu_gp_ref_cnt;
262 spinlock_t lu_gp_lock;
263 struct config_group lu_gp_group;
264 struct list_head lu_gp_node;
265 struct list_head lu_gp_mem_list;
268 struct t10_alua_lu_gp_member {
270 atomic_t lu_gp_mem_ref_cnt;
271 spinlock_t lu_gp_mem_lock;
272 struct t10_alua_lu_gp *lu_gp;
273 struct se_device *lu_gp_mem_dev;
274 struct list_head lu_gp_mem_list;
277 struct t10_alua_tg_pt_gp {
279 int tg_pt_gp_valid_id;
280 int tg_pt_gp_alua_supported_states;
281 int tg_pt_gp_alua_pending_state;
282 int tg_pt_gp_alua_previous_state;
283 int tg_pt_gp_alua_access_status;
284 int tg_pt_gp_alua_access_type;
285 int tg_pt_gp_nonop_delay_msecs;
286 int tg_pt_gp_trans_delay_msecs;
287 int tg_pt_gp_implicit_trans_secs;
289 int tg_pt_gp_write_metadata;
290 u32 tg_pt_gp_members;
291 atomic_t tg_pt_gp_alua_access_state;
292 atomic_t tg_pt_gp_ref_cnt;
293 spinlock_t tg_pt_gp_lock;
294 struct mutex tg_pt_gp_md_mutex;
295 struct se_device *tg_pt_gp_dev;
296 struct config_group tg_pt_gp_group;
297 struct list_head tg_pt_gp_list;
298 struct list_head tg_pt_gp_lun_list;
299 struct se_lun *tg_pt_gp_alua_lun;
300 struct se_node_acl *tg_pt_gp_alua_nacl;
301 struct delayed_work tg_pt_gp_transition_work;
302 struct completion *tg_pt_gp_transition_complete;
306 unsigned char device_identifier[INQUIRY_VPD_DEVICE_IDENTIFIER_LEN];
307 int protocol_identifier_set;
308 u32 protocol_identifier;
309 u32 device_identifier_code_set;
311 u32 device_identifier_type;
312 struct list_head vpd_list;
319 char unit_serial[INQUIRY_VPD_SERIAL_LEN];
320 spinlock_t t10_vpd_lock;
321 struct se_device *t10_dev;
322 struct config_group t10_wwn_group;
323 struct list_head t10_vpd_list;
326 struct t10_pr_registration {
327 /* Used for fabrics that contain WWN+ISID */
328 #define PR_REG_ISID_LEN 16
329 /* PR_REG_ISID_LEN + ',i,0x' */
330 #define PR_REG_ISID_ID_LEN (PR_REG_ISID_LEN + 5)
331 char pr_reg_isid[PR_REG_ISID_LEN];
332 /* Used during APTPL metadata reading */
333 #define PR_APTPL_MAX_IPORT_LEN 256
334 unsigned char pr_iport[PR_APTPL_MAX_IPORT_LEN];
335 /* Used during APTPL metadata reading */
336 #define PR_APTPL_MAX_TPORT_LEN 256
337 unsigned char pr_tport[PR_APTPL_MAX_TPORT_LEN];
340 /* Reservation effects all target ports */
341 int pr_reg_all_tg_pt;
342 /* Activate Persistence across Target Power Loss */
347 /* Used for fabric initiator WWPNs using a ISID */
348 bool isid_present_at_reg;
349 u64 pr_res_mapped_lun;
350 u64 pr_aptpl_target_lun;
352 u32 pr_res_generation;
355 atomic_t pr_res_holders;
356 struct se_node_acl *pr_reg_nacl;
357 /* Used by ALL_TG_PT=1 registration with deve->pr_ref taken */
358 struct se_dev_entry *pr_reg_deve;
359 struct list_head pr_reg_list;
360 struct list_head pr_reg_abort_list;
361 struct list_head pr_reg_aptpl_list;
362 struct list_head pr_reg_atp_list;
363 struct list_head pr_reg_atp_mem_list;
366 struct t10_reservation {
367 /* Reservation effects all target ports */
369 /* Activate Persistence across Target Power Loss enabled
372 #define PR_APTPL_BUF_LEN 262144
374 spinlock_t registration_lock;
375 spinlock_t aptpl_reg_lock;
377 * This will always be set by one individual I_T Nexus.
378 * However with all_tg_pt=1, other I_T Nexus from the
379 * same initiator can access PR reg/res info on a different
382 * There is also the 'All Registrants' case, where there is
383 * a single *pr_res_holder of the reservation, but all
384 * registrations are considered reservation holders.
386 struct se_node_acl *pr_res_holder;
387 struct list_head registration_list;
388 struct list_head aptpl_reg_list;
392 /* Task Management function to be performed */
394 /* Task Management response to send */
397 /* Reference to ITT that Task Mgmt should be performed */
399 void *fabric_tmr_ptr;
400 struct se_cmd *task_cmd;
401 struct se_device *tmr_dev;
402 struct se_lun *tmr_lun;
403 struct list_head tmr_list;
406 enum target_prot_op {
407 TARGET_PROT_NORMAL = 0,
408 TARGET_PROT_DIN_INSERT = (1 << 0),
409 TARGET_PROT_DOUT_INSERT = (1 << 1),
410 TARGET_PROT_DIN_STRIP = (1 << 2),
411 TARGET_PROT_DOUT_STRIP = (1 << 3),
412 TARGET_PROT_DIN_PASS = (1 << 4),
413 TARGET_PROT_DOUT_PASS = (1 << 5),
416 #define TARGET_PROT_ALL TARGET_PROT_DIN_INSERT | TARGET_PROT_DOUT_INSERT | \
417 TARGET_PROT_DIN_STRIP | TARGET_PROT_DOUT_STRIP | \
418 TARGET_PROT_DIN_PASS | TARGET_PROT_DOUT_PASS
420 enum target_prot_type {
421 TARGET_DIF_TYPE0_PROT,
422 TARGET_DIF_TYPE1_PROT,
423 TARGET_DIF_TYPE2_PROT,
424 TARGET_DIF_TYPE3_PROT,
427 enum target_core_dif_check {
428 TARGET_DIF_CHECK_GUARD = 0x1 << 0,
429 TARGET_DIF_CHECK_APPTAG = 0x1 << 1,
430 TARGET_DIF_CHECK_REFTAG = 0x1 << 2,
433 /* for sam_task_attr */
434 #define TCM_SIMPLE_TAG 0x20
435 #define TCM_HEAD_TAG 0x21
436 #define TCM_ORDERED_TAG 0x22
437 #define TCM_ACA_TAG 0x24
440 /* SAM response code being sent to initiator */
444 u16 scsi_sense_length;
445 unsigned cmd_wait_set:1;
446 unsigned unknown_data_length:1;
448 u64 tag; /* SAM command identifier aka task tag */
449 /* Delay for ALUA Active/NonOptimized state access in milliseconds */
450 int alua_nonop_delay;
451 /* See include/linux/dma-mapping.h */
452 enum dma_data_direction data_direction;
453 /* For SAM Task Attribute */
455 /* Used for se_sess->sess_tag_pool */
456 unsigned int map_tag;
457 /* Transport protocol dependent state, see transport_state_table */
458 enum transport_state_table t_state;
459 /* See se_cmd_flags_table */
461 /* Total size in bytes associated with command */
465 /* Persistent Reservation key */
467 /* Used for sense data */
469 struct list_head se_delayed_node;
470 struct list_head se_qf_node;
471 struct se_device *se_dev;
472 struct se_lun *se_lun;
473 /* Only used for internal passthrough and legacy TCM fabric modules */
474 struct se_session *se_sess;
475 struct se_tmr_req *se_tmr_req;
476 struct list_head se_cmd_list;
477 struct completion cmd_wait_comp;
478 const struct target_core_fabric_ops *se_tfo;
479 sense_reason_t (*execute_cmd)(struct se_cmd *);
480 sense_reason_t (*transport_complete_callback)(struct se_cmd *, bool, int *);
483 unsigned char *t_task_cdb;
484 unsigned char __t_task_cdb[TCM_MAX_COMMAND_SIZE];
485 unsigned long long t_task_lba;
486 unsigned int t_task_nolb;
487 unsigned int transport_state;
488 #define CMD_T_ABORTED (1 << 0)
489 #define CMD_T_ACTIVE (1 << 1)
490 #define CMD_T_COMPLETE (1 << 2)
491 #define CMD_T_SENT (1 << 4)
492 #define CMD_T_STOP (1 << 5)
493 #define CMD_T_DEV_ACTIVE (1 << 7)
494 #define CMD_T_BUSY (1 << 9)
495 #define CMD_T_TAS (1 << 10)
496 #define CMD_T_FABRIC_STOP (1 << 11)
497 spinlock_t t_state_lock;
498 struct kref cmd_kref;
499 struct completion t_transport_stop_comp;
501 struct work_struct work;
503 struct scatterlist *t_data_sg;
504 struct scatterlist *t_data_sg_orig;
505 unsigned int t_data_nents;
506 unsigned int t_data_nents_orig;
508 struct scatterlist *t_bidi_data_sg;
509 unsigned int t_bidi_data_nents;
511 /* Used for lun->lun_ref counting */
514 struct list_head state_list;
516 /* backend private data */
519 /* DIF related members */
520 enum target_prot_op prot_op;
521 enum target_prot_type prot_type;
526 struct scatterlist *t_prot_sg;
527 unsigned int t_prot_nents;
528 sense_reason_t pi_err;
536 struct list_head ua_nacl_list;
540 char initiatorname[TRANSPORT_IQN_LEN];
541 /* Used to signal demo mode created ACL, disabled by default */
542 bool dynamic_node_acl;
546 enum target_prot_type saved_prot_type;
547 #define MAX_ACL_TAG_SIZE 64
548 char acl_tag[MAX_ACL_TAG_SIZE];
549 /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
550 atomic_t acl_pr_ref_count;
551 struct hlist_head lun_entry_hlist;
552 struct se_session *nacl_sess;
553 struct se_portal_group *se_tpg;
554 struct mutex lun_entry_mutex;
555 spinlock_t nacl_sess_lock;
556 struct config_group acl_group;
557 struct config_group acl_attrib_group;
558 struct config_group acl_auth_group;
559 struct config_group acl_param_group;
560 struct config_group acl_fabric_stat_group;
561 struct list_head acl_list;
562 struct list_head acl_sess_list;
563 struct completion acl_free_comp;
564 struct kref acl_kref;
567 static inline struct se_node_acl *acl_to_nacl(struct config_item *item)
569 return container_of(to_config_group(item), struct se_node_acl,
573 static inline struct se_node_acl *attrib_to_nacl(struct config_item *item)
575 return container_of(to_config_group(item), struct se_node_acl,
579 static inline struct se_node_acl *auth_to_nacl(struct config_item *item)
581 return container_of(to_config_group(item), struct se_node_acl,
585 static inline struct se_node_acl *param_to_nacl(struct config_item *item)
587 return container_of(to_config_group(item), struct se_node_acl,
591 static inline struct se_node_acl *fabric_stat_to_nacl(struct config_item *item)
593 return container_of(to_config_group(item), struct se_node_acl,
594 acl_fabric_stat_group);
598 unsigned sess_tearing_down:1;
600 enum target_prot_op sup_prot_ops;
601 enum target_prot_type sess_prot_type;
602 struct se_node_acl *se_node_acl;
603 struct se_portal_group *se_tpg;
604 void *fabric_sess_ptr;
605 struct list_head sess_list;
606 struct list_head sess_acl_list;
607 struct list_head sess_cmd_list;
608 struct list_head sess_wait_list;
609 spinlock_t sess_cmd_lock;
611 struct percpu_ida sess_tag_pool;
615 struct se_transform_info;
618 struct se_ml_stat_grps {
619 struct config_group stat_group;
620 struct config_group scsi_auth_intr_group;
621 struct config_group scsi_att_intr_port_group;
626 struct se_node_acl *se_lun_nacl;
627 struct se_lun *se_lun;
628 struct config_group se_lun_group;
629 struct se_ml_stat_grps ml_stat_grps;
632 struct se_dev_entry {
638 atomic_long_t total_cmds;
639 atomic_long_t read_bytes;
640 atomic_long_t write_bytes;
642 /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
644 struct completion pr_comp;
645 struct se_lun_acl __rcu *se_lun_acl;
647 struct se_lun __rcu *se_lun;
648 #define DEF_PR_REG_ACTIVE 1
649 unsigned long deve_flags;
650 struct list_head alua_port_list;
651 struct list_head lun_link;
652 struct list_head ua_list;
653 struct hlist_node link;
654 struct rcu_head rcu_head;
657 struct se_dev_attrib {
658 int emulate_model_alias;
660 int emulate_fua_write;
661 int emulate_fua_read;
662 int emulate_write_cache;
663 int emulate_ua_intlck_ctrl;
670 enum target_prot_type pi_prot_type;
671 enum target_prot_type hw_pi_prot_type;
672 int enforce_pr_isids;
675 int emulate_rest_reord;
676 int unmap_zeroes_data;
683 u32 max_unmap_lba_count;
684 u32 max_unmap_block_desc_count;
685 u32 unmap_granularity;
686 u32 unmap_granularity_alignment;
687 u32 max_write_same_len;
688 u32 max_bytes_per_io;
689 struct se_device *da_dev;
690 struct config_group da_group;
693 struct se_port_stat_grps {
694 struct config_group stat_group;
695 struct config_group scsi_port_group;
696 struct config_group scsi_tgt_port_group;
697 struct config_group scsi_transport_group;
700 struct scsi_port_stats {
701 atomic_long_t cmd_pdus;
702 atomic_long_t tx_data_octets;
703 atomic_long_t rx_data_octets;
708 #define SE_LUN_LINK_MAGIC 0xffff7771
713 /* RELATIVE TARGET PORT IDENTIFER */
715 atomic_t lun_acl_count;
716 struct se_device __rcu *lun_se_dev;
718 struct list_head lun_deve_list;
719 spinlock_t lun_deve_lock;
722 int lun_tg_pt_secondary_stat;
723 int lun_tg_pt_secondary_write_md;
724 atomic_t lun_tg_pt_secondary_offline;
725 struct mutex lun_tg_pt_md_mutex;
727 /* ALUA target port group linkage */
728 struct list_head lun_tg_pt_gp_link;
729 struct t10_alua_tg_pt_gp *lun_tg_pt_gp;
730 spinlock_t lun_tg_pt_gp_lock;
732 struct se_portal_group *lun_tpg;
733 struct scsi_port_stats lun_stats;
734 struct config_group lun_group;
735 struct se_port_stat_grps port_stat_grps;
736 struct completion lun_ref_comp;
737 struct percpu_ref lun_ref;
738 struct list_head lun_dev_link;
739 struct hlist_node link;
740 struct rcu_head rcu_head;
743 struct se_dev_stat_grps {
744 struct config_group stat_group;
745 struct config_group scsi_dev_group;
746 struct config_group scsi_tgt_dev_group;
747 struct config_group scsi_lu_group;
751 #define SE_DEV_LINK_MAGIC 0xfeeddeef
753 /* RELATIVE TARGET PORT IDENTIFER Counter */
754 u16 dev_rpti_counter;
755 /* Used for SAM Task Attribute ordering */
756 u32 dev_cur_ordered_id;
758 #define DF_CONFIGURED 0x00000001
759 #define DF_FIRMWARE_VPD_UNIT_SERIAL 0x00000002
760 #define DF_EMULATED_VPD_UNIT_SERIAL 0x00000004
761 #define DF_USING_UDEV_PATH 0x00000008
762 #define DF_USING_ALIAS 0x00000010
763 #define DF_READ_ONLY 0x00000020
764 /* Physical device queue depth */
766 /* Used for SPC-2 reservations enforce of ISIDs */
767 u64 dev_res_bin_isid;
768 /* Pointer to transport specific device structure */
771 atomic_long_t num_resets;
772 atomic_long_t num_cmds;
773 atomic_long_t read_bytes;
774 atomic_long_t write_bytes;
775 /* Active commands on this virtual SE device */
776 atomic_t simple_cmds;
777 atomic_t dev_ordered_sync;
778 atomic_t dev_qf_count;
780 spinlock_t delayed_cmd_lock;
781 spinlock_t execute_task_lock;
782 spinlock_t dev_reservation_lock;
783 unsigned int dev_reservation_flags;
784 #define DRF_SPC2_RESERVATIONS 0x00000001
785 #define DRF_SPC2_RESERVATIONS_WITH_ISID 0x00000002
786 spinlock_t se_port_lock;
787 spinlock_t se_tmr_lock;
788 spinlock_t qf_cmd_lock;
789 struct semaphore caw_sem;
790 /* Used for legacy SPC-2 reservationsa */
791 struct se_node_acl *dev_reserved_node_acl;
792 /* Used for ALUA Logical Unit Group membership */
793 struct t10_alua_lu_gp_member *dev_alua_lu_gp_mem;
794 /* Used for SPC-3 Persistent Reservations */
795 struct t10_pr_registration *dev_pr_res_holder;
796 struct list_head dev_sep_list;
797 struct list_head dev_tmr_list;
798 struct workqueue_struct *tmr_wq;
799 struct work_struct qf_work_queue;
800 struct list_head delayed_cmd_list;
801 struct list_head state_list;
802 struct list_head qf_cmd_list;
803 struct list_head g_dev_node;
804 /* Pointer to associated SE HBA */
805 struct se_hba *se_hba;
806 /* T10 Inquiry and VPD WWN Information */
807 struct t10_wwn t10_wwn;
808 /* T10 Asymmetric Logical Unit Assignment for Target Ports */
809 struct t10_alua t10_alua;
810 /* T10 SPC-2 + SPC-3 Reservations */
811 struct t10_reservation t10_pr;
812 struct se_dev_attrib dev_attrib;
813 struct config_group dev_group;
814 struct config_group dev_pr_group;
815 struct se_dev_stat_grps dev_stat_grps;
816 #define SE_DEV_ALIAS_LEN 512 /* must be less than PAGE_SIZE */
817 unsigned char dev_alias[SE_DEV_ALIAS_LEN];
818 #define SE_UDEV_PATH_LEN 512 /* must be less than PAGE_SIZE */
819 unsigned char udev_path[SE_UDEV_PATH_LEN];
820 /* Pointer to template of function pointers for transport */
821 const struct target_backend_ops *transport;
822 /* Linked list for struct se_hba struct se_device list */
823 struct list_head dev_list;
824 struct se_lun xcopy_lun;
825 /* Protection Information */
827 /* For se_lun->lun_se_dev RCU read-side critical access */
829 struct rcu_head rcu_head;
835 /* See hba_flags_table */
837 /* Virtual iSCSI devices attached. */
840 /* Pointer to transport specific host structure. */
842 struct list_head hba_node;
843 spinlock_t device_lock;
844 struct config_group hba_group;
845 struct mutex hba_access_mutex;
846 struct target_backend *backend;
850 struct se_portal_group *tpg_np_parent;
851 struct config_group tpg_np_group;
854 static inline struct se_tpg_np *to_tpg_np(struct config_item *item)
856 return container_of(to_config_group(item), struct se_tpg_np,
860 struct se_portal_group {
862 * PROTOCOL IDENTIFIER value per SPC4, 7.5.1.
864 * Negative values can be used by fabric drivers for internal use TPGs.
867 /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
868 atomic_t tpg_pr_ref_count;
869 /* Spinlock for adding/removing ACLed Nodes */
870 struct mutex acl_node_mutex;
871 /* Spinlock for adding/removing sessions */
872 spinlock_t session_lock;
873 struct mutex tpg_lun_mutex;
874 struct list_head se_tpg_node;
875 /* linked list for initiator ACL list */
876 struct list_head acl_node_list;
877 struct hlist_head tpg_lun_hlist;
878 struct se_lun *tpg_virt_lun0;
879 /* List of TCM sessions associated wth this TPG */
880 struct list_head tpg_sess_list;
881 /* Pointer to $FABRIC_MOD dependent code */
882 const struct target_core_fabric_ops *se_tpg_tfo;
883 struct se_wwn *se_tpg_wwn;
884 struct config_group tpg_group;
885 struct config_group tpg_lun_group;
886 struct config_group tpg_np_group;
887 struct config_group tpg_acl_group;
888 struct config_group tpg_attrib_group;
889 struct config_group tpg_auth_group;
890 struct config_group tpg_param_group;
893 static inline struct se_portal_group *to_tpg(struct config_item *item)
895 return container_of(to_config_group(item), struct se_portal_group,
899 static inline struct se_portal_group *attrib_to_tpg(struct config_item *item)
901 return container_of(to_config_group(item), struct se_portal_group,
905 static inline struct se_portal_group *auth_to_tpg(struct config_item *item)
907 return container_of(to_config_group(item), struct se_portal_group,
911 static inline struct se_portal_group *param_to_tpg(struct config_item *item)
913 return container_of(to_config_group(item), struct se_portal_group,
918 struct target_fabric_configfs *wwn_tf;
920 struct config_group wwn_group;
921 struct config_group fabric_stat_group;
924 static inline void atomic_inc_mb(atomic_t *v)
926 smp_mb__before_atomic();
928 smp_mb__after_atomic();
931 static inline void atomic_dec_mb(atomic_t *v)
933 smp_mb__before_atomic();
935 smp_mb__after_atomic();
938 #endif /* TARGET_CORE_BASE_H */