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1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef TARGET_CORE_BASE_H
3#define TARGET_CORE_BASE_H
4
5#include <linux/configfs.h> /* struct config_group */
6#include <linux/dma-direction.h> /* enum dma_data_direction */
7#include <linux/percpu_ida.h> /* struct percpu_ida */
8#include <linux/percpu-refcount.h>
9#include <linux/semaphore.h> /* struct semaphore */
10#include <linux/completion.h>
11
12#define TARGET_CORE_VERSION "v5.0"
13
14/*
15 * Maximum size of a CDB that can be stored in se_cmd without allocating
16 * memory dynamically for the CDB.
17 */
18#define TCM_MAX_COMMAND_SIZE 32
19/*
20 * From include/scsi/scsi_cmnd.h:SCSI_SENSE_BUFFERSIZE, currently
21 * defined 96, but the real limit is 252 (or 260 including the header)
22 */
23#define TRANSPORT_SENSE_BUFFER 96
24/* Used by transport_send_check_condition_and_sense() */
25#define SPC_SENSE_KEY_OFFSET 2
26#define SPC_ADD_SENSE_LEN_OFFSET 7
27#define SPC_DESC_TYPE_OFFSET 8
28#define SPC_ADDITIONAL_DESC_LEN_OFFSET 9
29#define SPC_VALIDITY_OFFSET 10
30#define SPC_ASC_KEY_OFFSET 12
31#define SPC_ASCQ_KEY_OFFSET 13
32#define TRANSPORT_IQN_LEN 224
33/* Used by target_core_store_alua_lu_gp() and target_core_alua_lu_gp_show_attr_members() */
34#define LU_GROUP_NAME_BUF 256
35/* Used by core_alua_store_tg_pt_gp_info() and target_core_alua_tg_pt_gp_show_attr_members() */
36#define TG_PT_GROUP_NAME_BUF 256
37/* Used to parse VPD into struct t10_vpd */
38#define VPD_TMP_BUF_SIZE 254
39/* Used by transport_generic_cmd_sequencer() */
40#define READ_BLOCK_LEN 6
41#define READ_CAP_LEN 8
42#define READ_POSITION_LEN 20
43#define INQUIRY_LEN 36
44/* Used by transport_get_inquiry_vpd_serial() */
45#define INQUIRY_VPD_SERIAL_LEN 254
46/* Used by transport_get_inquiry_vpd_device_ident() */
47#define INQUIRY_VPD_DEVICE_IDENTIFIER_LEN 254
48
49/* Attempts before moving from SHORT to LONG */
50#define PYX_TRANSPORT_WINDOW_CLOSED_THRESHOLD 3
51#define PYX_TRANSPORT_WINDOW_CLOSED_WAIT_SHORT 3 /* In milliseconds */
52#define PYX_TRANSPORT_WINDOW_CLOSED_WAIT_LONG 10 /* In milliseconds */
53
54#define PYX_TRANSPORT_STATUS_INTERVAL 5 /* In seconds */
55
56/* struct se_dev_attrib sanity values */
57/* Default max_unmap_lba_count */
58#define DA_MAX_UNMAP_LBA_COUNT 0
59/* Default max_unmap_block_desc_count */
60#define DA_MAX_UNMAP_BLOCK_DESC_COUNT 0
61/* Default unmap_granularity */
62#define DA_UNMAP_GRANULARITY_DEFAULT 0
63/* Default unmap_granularity_alignment */
64#define DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT 0
65/* Default unmap_zeroes_data */
66#define DA_UNMAP_ZEROES_DATA_DEFAULT 0
67/* Default max_write_same_len, disabled by default */
68#define DA_MAX_WRITE_SAME_LEN 0
69/* Use a model alias based on the configfs backend device name */
70#define DA_EMULATE_MODEL_ALIAS 0
71/* Emulation for WriteCache and SYNCHRONIZE_CACHE */
72#define DA_EMULATE_WRITE_CACHE 0
73/* Emulation for UNIT ATTENTION Interlock Control */
74#define DA_EMULATE_UA_INTLLCK_CTRL 0
75/* Emulation for TASK_ABORTED status (TAS) by default */
76#define DA_EMULATE_TAS 1
77/* Emulation for Thin Provisioning UNMAP using block/blk-lib.c:blkdev_issue_discard() */
78#define DA_EMULATE_TPU 0
79/*
80 * Emulation for Thin Provisioning WRITE_SAME w/ UNMAP=1 bit using
81 * block/blk-lib.c:blkdev_issue_discard()
82 */
83#define DA_EMULATE_TPWS 0
84/* Emulation for CompareAndWrite (AtomicTestandSet) by default */
85#define DA_EMULATE_CAW 1
86/* Emulation for 3rd Party Copy (ExtendedCopy) by default */
87#define DA_EMULATE_3PC 1
88/* No Emulation for PSCSI by default */
89#define DA_EMULATE_ALUA 0
90/* Enforce SCSI Initiator Port TransportID with 'ISID' for PR */
91#define DA_ENFORCE_PR_ISIDS 1
92/* Force SPC-3 PR Activate Persistence across Target Power Loss */
93#define DA_FORCE_PR_APTPL 0
94#define DA_STATUS_MAX_SECTORS_MIN 16
95#define DA_STATUS_MAX_SECTORS_MAX 8192
96/* By default don't report non-rotating (solid state) medium */
97#define DA_IS_NONROT 0
98/* Queue Algorithm Modifier default for restricted reordering in control mode page */
99#define DA_EMULATE_REST_REORD 0
100
101#define SE_INQUIRY_BUF 1024
102#define SE_MODE_PAGE_BUF 512
103#define SE_SENSE_BUF 96
104
105/* struct se_hba->hba_flags */
106enum hba_flags_table {
107 HBA_FLAGS_INTERNAL_USE = 0x01,
108 HBA_FLAGS_PSCSI_MODE = 0x02,
109};
110
111/* Special transport agnostic struct se_cmd->t_states */
112enum transport_state_table {
113 TRANSPORT_NO_STATE = 0,
114 TRANSPORT_NEW_CMD = 1,
115 TRANSPORT_WRITE_PENDING = 3,
116 TRANSPORT_PROCESSING = 5,
117 TRANSPORT_COMPLETE = 6,
118 TRANSPORT_ISTATE_PROCESSING = 11,
119 TRANSPORT_COMPLETE_QF_WP = 18,
120 TRANSPORT_COMPLETE_QF_OK = 19,
121 TRANSPORT_COMPLETE_QF_ERR = 20,
122};
123
124/* Used for struct se_cmd->se_cmd_flags */
125enum se_cmd_flags_table {
126 SCF_SUPPORTED_SAM_OPCODE = 0x00000001,
127 SCF_TRANSPORT_TASK_SENSE = 0x00000002,
128 SCF_EMULATED_TASK_SENSE = 0x00000004,
129 SCF_SCSI_DATA_CDB = 0x00000008,
130 SCF_SCSI_TMR_CDB = 0x00000010,
131 SCF_FUA = 0x00000080,
132 SCF_SE_LUN_CMD = 0x00000100,
133 SCF_BIDI = 0x00000400,
134 SCF_SENT_CHECK_CONDITION = 0x00000800,
135 SCF_OVERFLOW_BIT = 0x00001000,
136 SCF_UNDERFLOW_BIT = 0x00002000,
137 SCF_SEND_DELAYED_TAS = 0x00004000,
138 SCF_ALUA_NON_OPTIMIZED = 0x00008000,
139 SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC = 0x00020000,
140 SCF_COMPARE_AND_WRITE = 0x00080000,
141 SCF_COMPARE_AND_WRITE_POST = 0x00100000,
142 SCF_PASSTHROUGH_PROT_SG_TO_MEM_NOALLOC = 0x00200000,
143 SCF_ACK_KREF = 0x00400000,
144 SCF_USE_CPUID = 0x00800000,
145 SCF_TASK_ATTR_SET = 0x01000000,
146};
147
148/*
149 * Used by transport_send_check_condition_and_sense()
150 * to signal which ASC/ASCQ sense payload should be built.
151 */
152typedef unsigned __bitwise sense_reason_t;
153
154enum tcm_sense_reason_table {
155#define R(x) (__force sense_reason_t )(x)
156 TCM_NO_SENSE = R(0x00),
157 TCM_NON_EXISTENT_LUN = R(0x01),
158 TCM_UNSUPPORTED_SCSI_OPCODE = R(0x02),
159 TCM_INCORRECT_AMOUNT_OF_DATA = R(0x03),
160 TCM_UNEXPECTED_UNSOLICITED_DATA = R(0x04),
161 TCM_SERVICE_CRC_ERROR = R(0x05),
162 TCM_SNACK_REJECTED = R(0x06),
163 TCM_SECTOR_COUNT_TOO_MANY = R(0x07),
164 TCM_INVALID_CDB_FIELD = R(0x08),
165 TCM_INVALID_PARAMETER_LIST = R(0x09),
166 TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE = R(0x0a),
167 TCM_UNKNOWN_MODE_PAGE = R(0x0b),
168 TCM_WRITE_PROTECTED = R(0x0c),
169 TCM_CHECK_CONDITION_ABORT_CMD = R(0x0d),
170 TCM_CHECK_CONDITION_UNIT_ATTENTION = R(0x0e),
171 TCM_CHECK_CONDITION_NOT_READY = R(0x0f),
172 TCM_RESERVATION_CONFLICT = R(0x10),
173 TCM_ADDRESS_OUT_OF_RANGE = R(0x11),
174 TCM_OUT_OF_RESOURCES = R(0x12),
175 TCM_PARAMETER_LIST_LENGTH_ERROR = R(0x13),
176 TCM_MISCOMPARE_VERIFY = R(0x14),
177 TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED = R(0x15),
178 TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED = R(0x16),
179 TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED = R(0x17),
180 TCM_COPY_TARGET_DEVICE_NOT_REACHABLE = R(0x18),
181 TCM_TOO_MANY_TARGET_DESCS = R(0x19),
182 TCM_UNSUPPORTED_TARGET_DESC_TYPE_CODE = R(0x1a),
183 TCM_TOO_MANY_SEGMENT_DESCS = R(0x1b),
184 TCM_UNSUPPORTED_SEGMENT_DESC_TYPE_CODE = R(0x1c),
185 TCM_INSUFFICIENT_REGISTRATION_RESOURCES = R(0x1d),
186 TCM_LUN_BUSY = R(0x1e),
187#undef R
188};
189
190enum target_sc_flags_table {
191 TARGET_SCF_BIDI_OP = 0x01,
192 TARGET_SCF_ACK_KREF = 0x02,
193 TARGET_SCF_UNKNOWN_SIZE = 0x04,
194 TARGET_SCF_USE_CPUID = 0x08,
195 TARGET_SCF_LOOKUP_LUN_FROM_TAG = 0x10,
196};
197
198/* fabric independent task management function values */
199enum tcm_tmreq_table {
200 TMR_ABORT_TASK = 1,
201 TMR_ABORT_TASK_SET = 2,
202 TMR_CLEAR_ACA = 3,
203 TMR_CLEAR_TASK_SET = 4,
204 TMR_LUN_RESET = 5,
205 TMR_TARGET_WARM_RESET = 6,
206 TMR_TARGET_COLD_RESET = 7,
207 TMR_UNKNOWN = 0xff,
208};
209
210/* fabric independent task management response values */
211enum tcm_tmrsp_table {
212 TMR_FUNCTION_FAILED = 0,
213 TMR_FUNCTION_COMPLETE = 1,
214 TMR_TASK_DOES_NOT_EXIST = 2,
215 TMR_LUN_DOES_NOT_EXIST = 3,
216 TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED = 4,
217 TMR_FUNCTION_REJECTED = 5,
218};
219
220/*
221 * Used for target SCSI statistics
222 */
223typedef enum {
224 SCSI_INST_INDEX,
225 SCSI_AUTH_INTR_INDEX,
226 SCSI_INDEX_TYPE_MAX
227} scsi_index_t;
228
229struct se_cmd;
230
231struct t10_alua_lba_map_member {
232 struct list_head lba_map_mem_list;
233 int lba_map_mem_alua_state;
234 int lba_map_mem_alua_pg_id;
235};
236
237struct t10_alua_lba_map {
238 u64 lba_map_first_lba;
239 u64 lba_map_last_lba;
240 struct list_head lba_map_list;
241 struct list_head lba_map_mem_list;
242};
243
244struct t10_alua {
245 /* ALUA Target Port Group ID */
246 u16 alua_tg_pt_gps_counter;
247 u32 alua_tg_pt_gps_count;
248 /* Referrals support */
249 spinlock_t lba_map_lock;
250 u32 lba_map_segment_size;
251 u32 lba_map_segment_multiplier;
252 struct list_head lba_map_list;
253 spinlock_t tg_pt_gps_lock;
254 struct se_device *t10_dev;
255 /* Used for default ALUA Target Port Group */
256 struct t10_alua_tg_pt_gp *default_tg_pt_gp;
257 /* Used for default ALUA Target Port Group ConfigFS group */
258 struct config_group alua_tg_pt_gps_group;
259 struct list_head tg_pt_gps_list;
260};
261
262struct t10_alua_lu_gp {
263 u16 lu_gp_id;
264 int lu_gp_valid_id;
265 u32 lu_gp_members;
266 atomic_t lu_gp_ref_cnt;
267 spinlock_t lu_gp_lock;
268 struct config_group lu_gp_group;
269 struct list_head lu_gp_node;
270 struct list_head lu_gp_mem_list;
271};
272
273struct t10_alua_lu_gp_member {
274 bool lu_gp_assoc;
275 atomic_t lu_gp_mem_ref_cnt;
276 spinlock_t lu_gp_mem_lock;
277 struct t10_alua_lu_gp *lu_gp;
278 struct se_device *lu_gp_mem_dev;
279 struct list_head lu_gp_mem_list;
280};
281
282struct t10_alua_tg_pt_gp {
283 u16 tg_pt_gp_id;
284 int tg_pt_gp_valid_id;
285 int tg_pt_gp_alua_supported_states;
286 int tg_pt_gp_alua_access_status;
287 int tg_pt_gp_alua_access_type;
288 int tg_pt_gp_nonop_delay_msecs;
289 int tg_pt_gp_trans_delay_msecs;
290 int tg_pt_gp_implicit_trans_secs;
291 int tg_pt_gp_pref;
292 int tg_pt_gp_write_metadata;
293 u32 tg_pt_gp_members;
294 int tg_pt_gp_alua_access_state;
295 atomic_t tg_pt_gp_ref_cnt;
296 spinlock_t tg_pt_gp_lock;
297 struct mutex tg_pt_gp_transition_mutex;
298 struct se_device *tg_pt_gp_dev;
299 struct config_group tg_pt_gp_group;
300 struct list_head tg_pt_gp_list;
301 struct list_head tg_pt_gp_lun_list;
302 struct se_lun *tg_pt_gp_alua_lun;
303 struct se_node_acl *tg_pt_gp_alua_nacl;
304};
305
306struct t10_vpd {
307 unsigned char device_identifier[INQUIRY_VPD_DEVICE_IDENTIFIER_LEN];
308 int protocol_identifier_set;
309 u32 protocol_identifier;
310 u32 device_identifier_code_set;
311 u32 association;
312 u32 device_identifier_type;
313 struct list_head vpd_list;
314};
315
316struct t10_wwn {
317 char vendor[8];
318 char model[16];
319 char revision[4];
320 char unit_serial[INQUIRY_VPD_SERIAL_LEN];
321 spinlock_t t10_vpd_lock;
322 struct se_device *t10_dev;
323 struct config_group t10_wwn_group;
324 struct list_head t10_vpd_list;
325};
326
327struct t10_pr_registration {
328 /* Used for fabrics that contain WWN+ISID */
329#define PR_REG_ISID_LEN 16
330 /* PR_REG_ISID_LEN + ',i,0x' */
331#define PR_REG_ISID_ID_LEN (PR_REG_ISID_LEN + 5)
332 char pr_reg_isid[PR_REG_ISID_LEN];
333 /* Used during APTPL metadata reading */
334#define PR_APTPL_MAX_IPORT_LEN 256
335 unsigned char pr_iport[PR_APTPL_MAX_IPORT_LEN];
336 /* Used during APTPL metadata reading */
337#define PR_APTPL_MAX_TPORT_LEN 256
338 unsigned char pr_tport[PR_APTPL_MAX_TPORT_LEN];
339 u16 pr_aptpl_rpti;
340 u16 pr_reg_tpgt;
341 /* Reservation effects all target ports */
342 int pr_reg_all_tg_pt;
343 /* Activate Persistence across Target Power Loss */
344 int pr_reg_aptpl;
345 int pr_res_holder;
346 int pr_res_type;
347 int pr_res_scope;
348 /* Used for fabric initiator WWPNs using a ISID */
349 bool isid_present_at_reg;
350 u64 pr_res_mapped_lun;
351 u64 pr_aptpl_target_lun;
352 u16 tg_pt_sep_rtpi;
353 u32 pr_res_generation;
354 u64 pr_reg_bin_isid;
355 u64 pr_res_key;
356 atomic_t pr_res_holders;
357 struct se_node_acl *pr_reg_nacl;
358 /* Used by ALL_TG_PT=1 registration with deve->pr_ref taken */
359 struct se_dev_entry *pr_reg_deve;
360 struct list_head pr_reg_list;
361 struct list_head pr_reg_abort_list;
362 struct list_head pr_reg_aptpl_list;
363 struct list_head pr_reg_atp_list;
364 struct list_head pr_reg_atp_mem_list;
365};
366
367struct t10_reservation {
368 /* Reservation effects all target ports */
369 int pr_all_tg_pt;
370 /* Activate Persistence across Target Power Loss enabled
371 * for SCSI device */
372 int pr_aptpl_active;
373#define PR_APTPL_BUF_LEN 262144
374 u32 pr_generation;
375 spinlock_t registration_lock;
376 spinlock_t aptpl_reg_lock;
377 /*
378 * This will always be set by one individual I_T Nexus.
379 * However with all_tg_pt=1, other I_T Nexus from the
380 * same initiator can access PR reg/res info on a different
381 * target port.
382 *
383 * There is also the 'All Registrants' case, where there is
384 * a single *pr_res_holder of the reservation, but all
385 * registrations are considered reservation holders.
386 */
387 struct se_node_acl *pr_res_holder;
388 struct list_head registration_list;
389 struct list_head aptpl_reg_list;
390};
391
392struct se_tmr_req {
393 /* Task Management function to be performed */
394 u8 function;
395 /* Task Management response to send */
396 u8 response;
397 int call_transport;
398 /* Reference to ITT that Task Mgmt should be performed */
399 u64 ref_task_tag;
400 void *fabric_tmr_ptr;
401 struct se_cmd *task_cmd;
402 struct se_device *tmr_dev;
403 struct list_head tmr_list;
404};
405
406enum 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),
414};
415
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
419
420enum target_prot_type {
421 TARGET_DIF_TYPE0_PROT,
422 TARGET_DIF_TYPE1_PROT,
423 TARGET_DIF_TYPE2_PROT,
424 TARGET_DIF_TYPE3_PROT,
425};
426
427enum 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,
431};
432
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
438
439struct se_cmd {
440 /* SAM response code being sent to initiator */
441 u8 scsi_status;
442 u8 scsi_asc;
443 u8 scsi_ascq;
444 u16 scsi_sense_length;
445 unsigned cmd_wait_set:1;
446 unsigned unknown_data_length:1;
447 bool state_active: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 */
454 int sam_task_attr;
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 */
460 u32 se_cmd_flags;
461 /* Total size in bytes associated with command */
462 u32 data_length;
463 u32 residual_count;
464 u64 orig_fe_lun;
465 /* Persistent Reservation key */
466 u64 pr_res_key;
467 /* Used for sense data */
468 void *sense_buffer;
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 *);
481 void *protocol_data;
482
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_TAS (1 << 10)
494#define CMD_T_FABRIC_STOP (1 << 11)
495#define CMD_T_PRE_EXECUTE (1 << 12)
496 spinlock_t t_state_lock;
497 struct kref cmd_kref;
498 struct completion t_transport_stop_comp;
499
500 struct work_struct work;
501
502 struct scatterlist *t_data_sg;
503 struct scatterlist *t_data_sg_orig;
504 unsigned int t_data_nents;
505 unsigned int t_data_nents_orig;
506 void *t_data_vmap;
507 struct scatterlist *t_bidi_data_sg;
508 unsigned int t_bidi_data_nents;
509
510 /* Used for lun->lun_ref counting */
511 int lun_ref_active;
512
513 struct list_head state_list;
514
515 /* backend private data */
516 void *priv;
517
518 /* DIF related members */
519 enum target_prot_op prot_op;
520 enum target_prot_type prot_type;
521 u8 prot_checks;
522 bool prot_pto;
523 u32 prot_length;
524 u32 reftag_seed;
525 struct scatterlist *t_prot_sg;
526 unsigned int t_prot_nents;
527 sense_reason_t pi_err;
528 sector_t bad_sector;
529 int cpuid;
530};
531
532struct se_ua {
533 u8 ua_asc;
534 u8 ua_ascq;
535 struct list_head ua_nacl_list;
536};
537
538struct se_node_acl {
539 char initiatorname[TRANSPORT_IQN_LEN];
540 /* Used to signal demo mode created ACL, disabled by default */
541 bool dynamic_node_acl;
542 bool dynamic_stop;
543 u32 queue_depth;
544 u32 acl_index;
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 list_head acl_list;
561 struct list_head acl_sess_list;
562 struct completion acl_free_comp;
563 struct kref acl_kref;
564};
565
566static inline struct se_node_acl *acl_to_nacl(struct config_item *item)
567{
568 return container_of(to_config_group(item), struct se_node_acl,
569 acl_group);
570}
571
572static inline struct se_node_acl *attrib_to_nacl(struct config_item *item)
573{
574 return container_of(to_config_group(item), struct se_node_acl,
575 acl_attrib_group);
576}
577
578static inline struct se_node_acl *auth_to_nacl(struct config_item *item)
579{
580 return container_of(to_config_group(item), struct se_node_acl,
581 acl_auth_group);
582}
583
584static inline struct se_node_acl *param_to_nacl(struct config_item *item)
585{
586 return container_of(to_config_group(item), struct se_node_acl,
587 acl_param_group);
588}
589
590static inline struct se_node_acl *fabric_stat_to_nacl(struct config_item *item)
591{
592 return container_of(to_config_group(item), struct se_node_acl,
593 acl_fabric_stat_group);
594}
595
596struct se_session {
597 unsigned sess_tearing_down:1;
598 u64 sess_bin_isid;
599 enum target_prot_op sup_prot_ops;
600 enum target_prot_type sess_prot_type;
601 struct se_node_acl *se_node_acl;
602 struct se_portal_group *se_tpg;
603 void *fabric_sess_ptr;
604 struct list_head sess_list;
605 struct list_head sess_acl_list;
606 struct list_head sess_cmd_list;
607 struct list_head sess_wait_list;
608 spinlock_t sess_cmd_lock;
609 void *sess_cmd_map;
610 struct percpu_ida sess_tag_pool;
611};
612
613struct se_device;
614struct se_transform_info;
615struct scatterlist;
616
617struct se_ml_stat_grps {
618 struct config_group stat_group;
619 struct config_group scsi_auth_intr_group;
620 struct config_group scsi_att_intr_port_group;
621};
622
623struct se_lun_acl {
624 u64 mapped_lun;
625 struct se_node_acl *se_lun_nacl;
626 struct se_lun *se_lun;
627 struct config_group se_lun_group;
628 struct se_ml_stat_grps ml_stat_grps;
629};
630
631struct se_dev_entry {
632 u64 mapped_lun;
633 u64 pr_res_key;
634 u64 creation_time;
635 bool lun_access_ro;
636 u32 attach_count;
637 atomic_long_t total_cmds;
638 atomic_long_t read_bytes;
639 atomic_long_t write_bytes;
640 atomic_t ua_count;
641 /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
642 struct kref pr_kref;
643 struct completion pr_comp;
644 struct se_lun_acl __rcu *se_lun_acl;
645 spinlock_t ua_lock;
646 struct se_lun __rcu *se_lun;
647#define DEF_PR_REG_ACTIVE 1
648 unsigned long deve_flags;
649 struct list_head alua_port_list;
650 struct list_head lun_link;
651 struct list_head ua_list;
652 struct hlist_node link;
653 struct rcu_head rcu_head;
654};
655
656struct se_dev_attrib {
657 int emulate_model_alias;
658 int emulate_dpo;
659 int emulate_fua_write;
660 int emulate_fua_read;
661 int emulate_write_cache;
662 int emulate_ua_intlck_ctrl;
663 int emulate_tas;
664 int emulate_tpu;
665 int emulate_tpws;
666 int emulate_caw;
667 int emulate_3pc;
668 int pi_prot_format;
669 enum target_prot_type pi_prot_type;
670 enum target_prot_type hw_pi_prot_type;
671 int pi_prot_verify;
672 int enforce_pr_isids;
673 int force_pr_aptpl;
674 int is_nonrot;
675 int emulate_rest_reord;
676 int unmap_zeroes_data;
677 u32 hw_block_size;
678 u32 block_size;
679 u32 hw_max_sectors;
680 u32 optimal_sectors;
681 u32 hw_queue_depth;
682 u32 queue_depth;
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;
691};
692
693struct 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;
698};
699
700struct scsi_port_stats {
701 atomic_long_t cmd_pdus;
702 atomic_long_t tx_data_octets;
703 atomic_long_t rx_data_octets;
704};
705
706struct se_lun {
707 u64 unpacked_lun;
708 bool lun_shutdown;
709 bool lun_access_ro;
710 u32 lun_index;
711
712 /* RELATIVE TARGET PORT IDENTIFER */
713 u16 lun_rtpi;
714 atomic_t lun_acl_count;
715 struct se_device __rcu *lun_se_dev;
716
717 struct list_head lun_deve_list;
718 spinlock_t lun_deve_lock;
719
720 /* ALUA state */
721 int lun_tg_pt_secondary_stat;
722 int lun_tg_pt_secondary_write_md;
723 atomic_t lun_tg_pt_secondary_offline;
724 struct mutex lun_tg_pt_md_mutex;
725
726 /* ALUA target port group linkage */
727 struct list_head lun_tg_pt_gp_link;
728 struct t10_alua_tg_pt_gp *lun_tg_pt_gp;
729 spinlock_t lun_tg_pt_gp_lock;
730
731 struct se_portal_group *lun_tpg;
732 struct scsi_port_stats lun_stats;
733 struct config_group lun_group;
734 struct se_port_stat_grps port_stat_grps;
735 struct completion lun_ref_comp;
736 struct completion lun_shutdown_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;
741};
742
743struct 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;
748};
749
750struct se_device {
751 /* RELATIVE TARGET PORT IDENTIFER Counter */
752 u16 dev_rpti_counter;
753 /* Used for SAM Task Attribute ordering */
754 u32 dev_cur_ordered_id;
755 u32 dev_flags;
756#define DF_CONFIGURED 0x00000001
757#define DF_FIRMWARE_VPD_UNIT_SERIAL 0x00000002
758#define DF_EMULATED_VPD_UNIT_SERIAL 0x00000004
759#define DF_USING_UDEV_PATH 0x00000008
760#define DF_USING_ALIAS 0x00000010
761#define DF_READ_ONLY 0x00000020
762 /* Physical device queue depth */
763 u32 queue_depth;
764 /* Used for SPC-2 reservations enforce of ISIDs */
765 u64 dev_res_bin_isid;
766 /* Pointer to transport specific device structure */
767 u32 dev_index;
768 u64 creation_time;
769 atomic_long_t num_resets;
770 atomic_long_t aborts_complete;
771 atomic_long_t aborts_no_task;
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;
779 u32 export_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 /* Pointer to associated SE HBA */
804 struct se_hba *se_hba;
805 /* T10 Inquiry and VPD WWN Information */
806 struct t10_wwn t10_wwn;
807 /* T10 Asymmetric Logical Unit Assignment for Target Ports */
808 struct t10_alua t10_alua;
809 /* T10 SPC-2 + SPC-3 Reservations */
810 struct t10_reservation t10_pr;
811 struct se_dev_attrib dev_attrib;
812 struct config_group dev_action_group;
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 struct se_lun xcopy_lun;
823 /* Protection Information */
824 int prot_length;
825 /* For se_lun->lun_se_dev RCU read-side critical access */
826 u32 hba_index;
827 struct rcu_head rcu_head;
828};
829
830struct se_hba {
831 u16 hba_tpgt;
832 u32 hba_id;
833 /* See hba_flags_table */
834 u32 hba_flags;
835 /* Virtual iSCSI devices attached. */
836 u32 dev_count;
837 u32 hba_index;
838 /* Pointer to transport specific host structure. */
839 void *hba_ptr;
840 struct list_head hba_node;
841 spinlock_t device_lock;
842 struct config_group hba_group;
843 struct mutex hba_access_mutex;
844 struct target_backend *backend;
845};
846
847struct se_tpg_np {
848 struct se_portal_group *tpg_np_parent;
849 struct config_group tpg_np_group;
850};
851
852static inline struct se_tpg_np *to_tpg_np(struct config_item *item)
853{
854 return container_of(to_config_group(item), struct se_tpg_np,
855 tpg_np_group);
856}
857
858struct se_portal_group {
859 /*
860 * PROTOCOL IDENTIFIER value per SPC4, 7.5.1.
861 *
862 * Negative values can be used by fabric drivers for internal use TPGs.
863 */
864 int proto_id;
865 /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
866 atomic_t tpg_pr_ref_count;
867 /* Spinlock for adding/removing ACLed Nodes */
868 struct mutex acl_node_mutex;
869 /* Spinlock for adding/removing sessions */
870 spinlock_t session_lock;
871 struct mutex tpg_lun_mutex;
872 struct list_head se_tpg_node;
873 /* linked list for initiator ACL list */
874 struct list_head acl_node_list;
875 struct hlist_head tpg_lun_hlist;
876 struct se_lun *tpg_virt_lun0;
877 /* List of TCM sessions associated wth this TPG */
878 struct list_head tpg_sess_list;
879 /* Pointer to $FABRIC_MOD dependent code */
880 const struct target_core_fabric_ops *se_tpg_tfo;
881 struct se_wwn *se_tpg_wwn;
882 struct config_group tpg_group;
883 struct config_group tpg_lun_group;
884 struct config_group tpg_np_group;
885 struct config_group tpg_acl_group;
886 struct config_group tpg_attrib_group;
887 struct config_group tpg_auth_group;
888 struct config_group tpg_param_group;
889};
890
891static inline struct se_portal_group *to_tpg(struct config_item *item)
892{
893 return container_of(to_config_group(item), struct se_portal_group,
894 tpg_group);
895}
896
897static inline struct se_portal_group *attrib_to_tpg(struct config_item *item)
898{
899 return container_of(to_config_group(item), struct se_portal_group,
900 tpg_attrib_group);
901}
902
903static inline struct se_portal_group *auth_to_tpg(struct config_item *item)
904{
905 return container_of(to_config_group(item), struct se_portal_group,
906 tpg_auth_group);
907}
908
909static inline struct se_portal_group *param_to_tpg(struct config_item *item)
910{
911 return container_of(to_config_group(item), struct se_portal_group,
912 tpg_param_group);
913}
914
915struct se_wwn {
916 struct target_fabric_configfs *wwn_tf;
917 void *priv;
918 struct config_group wwn_group;
919 struct config_group fabric_stat_group;
920};
921
922static inline void atomic_inc_mb(atomic_t *v)
923{
924 smp_mb__before_atomic();
925 atomic_inc(v);
926 smp_mb__after_atomic();
927}
928
929static inline void atomic_dec_mb(atomic_t *v)
930{
931 smp_mb__before_atomic();
932 atomic_dec(v);
933 smp_mb__after_atomic();
934}
935
936#endif /* TARGET_CORE_BASE_H */
1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef TARGET_CORE_BASE_H
3#define TARGET_CORE_BASE_H
4
5#include <linux/configfs.h> /* struct config_group */
6#include <linux/dma-direction.h> /* enum dma_data_direction */
7#include <linux/sbitmap.h>
8#include <linux/percpu-refcount.h>
9#include <linux/semaphore.h> /* struct semaphore */
10#include <linux/completion.h>
11
12#define TARGET_CORE_VERSION "v5.0"
13
14/*
15 * Maximum size of a CDB that can be stored in se_cmd without allocating
16 * memory dynamically for the CDB.
17 */
18#define TCM_MAX_COMMAND_SIZE 32
19/*
20 * From include/scsi/scsi_cmnd.h:SCSI_SENSE_BUFFERSIZE, currently
21 * defined 96, but the real limit is 252 (or 260 including the header)
22 */
23#define TRANSPORT_SENSE_BUFFER 96
24/* Used by transport_send_check_condition_and_sense() */
25#define SPC_SENSE_KEY_OFFSET 2
26#define SPC_ADD_SENSE_LEN_OFFSET 7
27#define SPC_DESC_TYPE_OFFSET 8
28#define SPC_ADDITIONAL_DESC_LEN_OFFSET 9
29#define SPC_VALIDITY_OFFSET 10
30#define SPC_ASC_KEY_OFFSET 12
31#define SPC_ASCQ_KEY_OFFSET 13
32#define TRANSPORT_IQN_LEN 224
33/* Used by target_core_store_alua_lu_gp() and target_core_alua_lu_gp_show_attr_members() */
34#define LU_GROUP_NAME_BUF 256
35/* Used by core_alua_store_tg_pt_gp_info() and target_core_alua_tg_pt_gp_show_attr_members() */
36#define TG_PT_GROUP_NAME_BUF 256
37/* Used to parse VPD into struct t10_vpd */
38#define VPD_TMP_BUF_SIZE 254
39/* Used by transport_generic_cmd_sequencer() */
40#define READ_BLOCK_LEN 6
41#define READ_CAP_LEN 8
42#define READ_POSITION_LEN 20
43#define INQUIRY_LEN 36
44/* Used by transport_get_inquiry_vpd_serial() */
45#define INQUIRY_VPD_SERIAL_LEN 254
46/* Used by transport_get_inquiry_vpd_device_ident() */
47#define INQUIRY_VPD_DEVICE_IDENTIFIER_LEN 254
48
49#define INQUIRY_VENDOR_LEN 8
50#define INQUIRY_MODEL_LEN 16
51#define INQUIRY_REVISION_LEN 4
52
53/* Attempts before moving from SHORT to LONG */
54#define PYX_TRANSPORT_WINDOW_CLOSED_THRESHOLD 3
55#define PYX_TRANSPORT_WINDOW_CLOSED_WAIT_SHORT 3 /* In milliseconds */
56#define PYX_TRANSPORT_WINDOW_CLOSED_WAIT_LONG 10 /* In milliseconds */
57
58#define PYX_TRANSPORT_STATUS_INTERVAL 5 /* In seconds */
59
60/* struct se_dev_attrib sanity values */
61/* Default max_unmap_lba_count */
62#define DA_MAX_UNMAP_LBA_COUNT 0
63/* Default max_unmap_block_desc_count */
64#define DA_MAX_UNMAP_BLOCK_DESC_COUNT 0
65/* Default unmap_granularity */
66#define DA_UNMAP_GRANULARITY_DEFAULT 0
67/* Default unmap_granularity_alignment */
68#define DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT 0
69/* Default unmap_zeroes_data */
70#define DA_UNMAP_ZEROES_DATA_DEFAULT 0
71/* Default max_write_same_len, disabled by default */
72#define DA_MAX_WRITE_SAME_LEN 0
73/* Use a model alias based on the configfs backend device name */
74#define DA_EMULATE_MODEL_ALIAS 0
75/* Emulation for WriteCache and SYNCHRONIZE_CACHE */
76#define DA_EMULATE_WRITE_CACHE 0
77/* Emulation for TASK_ABORTED status (TAS) by default */
78#define DA_EMULATE_TAS 1
79/* Emulation for Thin Provisioning UNMAP using block/blk-lib.c:blkdev_issue_discard() */
80#define DA_EMULATE_TPU 0
81/*
82 * Emulation for Thin Provisioning WRITE_SAME w/ UNMAP=1 bit using
83 * block/blk-lib.c:blkdev_issue_discard()
84 */
85#define DA_EMULATE_TPWS 0
86/* Emulation for CompareAndWrite (AtomicTestandSet) by default */
87#define DA_EMULATE_CAW 1
88/* Emulation for 3rd Party Copy (ExtendedCopy) by default */
89#define DA_EMULATE_3PC 1
90/* No Emulation for PSCSI by default */
91#define DA_EMULATE_ALUA 0
92/* Emulate SCSI2 RESERVE/RELEASE and Persistent Reservations by default */
93#define DA_EMULATE_PR 1
94/* Emulation for REPORT SUPPORTED OPERATION CODES */
95#define DA_EMULATE_RSOC 1
96/* Enforce SCSI Initiator Port TransportID with 'ISID' for PR */
97#define DA_ENFORCE_PR_ISIDS 1
98/* Force SPC-3 PR Activate Persistence across Target Power Loss */
99#define DA_FORCE_PR_APTPL 0
100#define DA_STATUS_MAX_SECTORS_MIN 16
101#define DA_STATUS_MAX_SECTORS_MAX 8192
102/* By default don't report non-rotating (solid state) medium */
103#define DA_IS_NONROT 0
104/* Queue Algorithm Modifier default for restricted reordering in control mode page */
105#define DA_EMULATE_REST_REORD 0
106
107#define SE_INQUIRY_BUF 1024
108#define SE_MODE_PAGE_BUF 512
109#define SE_SENSE_BUF 96
110
111/* struct se_hba->hba_flags */
112enum hba_flags_table {
113 HBA_FLAGS_INTERNAL_USE = 0x01,
114 HBA_FLAGS_PSCSI_MODE = 0x02,
115};
116
117/* Special transport agnostic struct se_cmd->t_states */
118enum transport_state_table {
119 TRANSPORT_NO_STATE = 0,
120 TRANSPORT_NEW_CMD = 1,
121 TRANSPORT_WRITE_PENDING = 3,
122 TRANSPORT_PROCESSING = 5,
123 TRANSPORT_COMPLETE = 6,
124 TRANSPORT_ISTATE_PROCESSING = 11,
125 TRANSPORT_COMPLETE_QF_WP = 18,
126 TRANSPORT_COMPLETE_QF_OK = 19,
127 TRANSPORT_COMPLETE_QF_ERR = 20,
128};
129
130/* Used for struct se_cmd->se_cmd_flags */
131enum se_cmd_flags_table {
132 SCF_SUPPORTED_SAM_OPCODE = (1 << 0),
133 SCF_TRANSPORT_TASK_SENSE = (1 << 1),
134 SCF_EMULATED_TASK_SENSE = (1 << 2),
135 SCF_SCSI_DATA_CDB = (1 << 3),
136 SCF_SCSI_TMR_CDB = (1 << 4),
137 SCF_FUA = (1 << 5),
138 SCF_SE_LUN_CMD = (1 << 6),
139 SCF_BIDI = (1 << 7),
140 SCF_SENT_CHECK_CONDITION = (1 << 8),
141 SCF_OVERFLOW_BIT = (1 << 9),
142 SCF_UNDERFLOW_BIT = (1 << 10),
143 SCF_ALUA_NON_OPTIMIZED = (1 << 11),
144 SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC = (1 << 12),
145 SCF_COMPARE_AND_WRITE = (1 << 13),
146 SCF_PASSTHROUGH_PROT_SG_TO_MEM_NOALLOC = (1 << 14),
147 SCF_ACK_KREF = (1 << 15),
148 SCF_USE_CPUID = (1 << 16),
149 SCF_TASK_ATTR_SET = (1 << 17),
150 SCF_TREAT_READ_AS_NORMAL = (1 << 18),
151};
152
153/*
154 * Used by transport_send_check_condition_and_sense()
155 * to signal which ASC/ASCQ sense payload should be built.
156 */
157typedef unsigned __bitwise sense_reason_t;
158
159enum tcm_sense_reason_table {
160#define R(x) (__force sense_reason_t )(x)
161 TCM_NO_SENSE = R(0x00),
162 TCM_NON_EXISTENT_LUN = R(0x01),
163 TCM_UNSUPPORTED_SCSI_OPCODE = R(0x02),
164 TCM_INCORRECT_AMOUNT_OF_DATA = R(0x03),
165 TCM_UNEXPECTED_UNSOLICITED_DATA = R(0x04),
166 TCM_SERVICE_CRC_ERROR = R(0x05),
167 TCM_SNACK_REJECTED = R(0x06),
168 TCM_SECTOR_COUNT_TOO_MANY = R(0x07),
169 TCM_INVALID_CDB_FIELD = R(0x08),
170 TCM_INVALID_PARAMETER_LIST = R(0x09),
171 TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE = R(0x0a),
172 TCM_UNKNOWN_MODE_PAGE = R(0x0b),
173 TCM_WRITE_PROTECTED = R(0x0c),
174 TCM_CHECK_CONDITION_ABORT_CMD = R(0x0d),
175 TCM_CHECK_CONDITION_UNIT_ATTENTION = R(0x0e),
176
177 TCM_RESERVATION_CONFLICT = R(0x10),
178 TCM_ADDRESS_OUT_OF_RANGE = R(0x11),
179 TCM_OUT_OF_RESOURCES = R(0x12),
180 TCM_PARAMETER_LIST_LENGTH_ERROR = R(0x13),
181 TCM_MISCOMPARE_VERIFY = R(0x14),
182 TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED = R(0x15),
183 TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED = R(0x16),
184 TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED = R(0x17),
185 TCM_COPY_TARGET_DEVICE_NOT_REACHABLE = R(0x18),
186 TCM_TOO_MANY_TARGET_DESCS = R(0x19),
187 TCM_UNSUPPORTED_TARGET_DESC_TYPE_CODE = R(0x1a),
188 TCM_TOO_MANY_SEGMENT_DESCS = R(0x1b),
189 TCM_UNSUPPORTED_SEGMENT_DESC_TYPE_CODE = R(0x1c),
190 TCM_INSUFFICIENT_REGISTRATION_RESOURCES = R(0x1d),
191 TCM_LUN_BUSY = R(0x1e),
192 TCM_INVALID_FIELD_IN_COMMAND_IU = R(0x1f),
193 TCM_ALUA_TG_PT_STANDBY = R(0x20),
194 TCM_ALUA_TG_PT_UNAVAILABLE = R(0x21),
195 TCM_ALUA_STATE_TRANSITION = R(0x22),
196 TCM_ALUA_OFFLINE = R(0x23),
197#undef R
198};
199
200enum target_sc_flags_table {
201 TARGET_SCF_BIDI_OP = 0x01,
202 TARGET_SCF_ACK_KREF = 0x02,
203 TARGET_SCF_UNKNOWN_SIZE = 0x04,
204 TARGET_SCF_USE_CPUID = 0x08,
205};
206
207/* fabric independent task management function values */
208enum tcm_tmreq_table {
209 TMR_ABORT_TASK = 1,
210 TMR_ABORT_TASK_SET = 2,
211 TMR_CLEAR_ACA = 3,
212 TMR_CLEAR_TASK_SET = 4,
213 TMR_LUN_RESET = 5,
214 TMR_TARGET_WARM_RESET = 6,
215 TMR_TARGET_COLD_RESET = 7,
216 TMR_LUN_RESET_PRO = 0x80,
217 TMR_UNKNOWN = 0xff,
218};
219
220/* fabric independent task management response values */
221enum tcm_tmrsp_table {
222 TMR_FUNCTION_FAILED = 0,
223 TMR_FUNCTION_COMPLETE = 1,
224 TMR_TASK_DOES_NOT_EXIST = 2,
225 TMR_LUN_DOES_NOT_EXIST = 3,
226 TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED = 4,
227 TMR_FUNCTION_REJECTED = 5,
228};
229
230/*
231 * Used for target SCSI statistics
232 */
233typedef enum {
234 SCSI_INST_INDEX,
235 SCSI_AUTH_INTR_INDEX,
236 SCSI_INDEX_TYPE_MAX
237} scsi_index_t;
238
239struct se_cmd;
240
241struct t10_alua_lba_map_member {
242 struct list_head lba_map_mem_list;
243 int lba_map_mem_alua_state;
244 int lba_map_mem_alua_pg_id;
245};
246
247struct t10_alua_lba_map {
248 u64 lba_map_first_lba;
249 u64 lba_map_last_lba;
250 struct list_head lba_map_list;
251 struct list_head lba_map_mem_list;
252};
253
254struct t10_alua {
255 /* ALUA Target Port Group ID */
256 u16 alua_tg_pt_gps_counter;
257 u32 alua_tg_pt_gps_count;
258 /* Referrals support */
259 spinlock_t lba_map_lock;
260 u32 lba_map_segment_size;
261 u32 lba_map_segment_multiplier;
262 struct list_head lba_map_list;
263 spinlock_t tg_pt_gps_lock;
264 struct se_device *t10_dev;
265 /* Used for default ALUA Target Port Group */
266 struct t10_alua_tg_pt_gp *default_tg_pt_gp;
267 /* Used for default ALUA Target Port Group ConfigFS group */
268 struct config_group alua_tg_pt_gps_group;
269 struct list_head tg_pt_gps_list;
270};
271
272struct t10_alua_lu_gp {
273 u16 lu_gp_id;
274 int lu_gp_valid_id;
275 u32 lu_gp_members;
276 atomic_t lu_gp_ref_cnt;
277 spinlock_t lu_gp_lock;
278 struct config_group lu_gp_group;
279 struct list_head lu_gp_node;
280 struct list_head lu_gp_mem_list;
281};
282
283struct t10_alua_lu_gp_member {
284 bool lu_gp_assoc;
285 atomic_t lu_gp_mem_ref_cnt;
286 spinlock_t lu_gp_mem_lock;
287 struct t10_alua_lu_gp *lu_gp;
288 struct se_device *lu_gp_mem_dev;
289 struct list_head lu_gp_mem_list;
290};
291
292struct t10_alua_tg_pt_gp {
293 u16 tg_pt_gp_id;
294 int tg_pt_gp_valid_id;
295 int tg_pt_gp_alua_supported_states;
296 int tg_pt_gp_alua_access_status;
297 int tg_pt_gp_alua_access_type;
298 int tg_pt_gp_nonop_delay_msecs;
299 int tg_pt_gp_trans_delay_msecs;
300 int tg_pt_gp_implicit_trans_secs;
301 int tg_pt_gp_pref;
302 int tg_pt_gp_write_metadata;
303 u32 tg_pt_gp_members;
304 int tg_pt_gp_alua_access_state;
305 atomic_t tg_pt_gp_ref_cnt;
306 spinlock_t tg_pt_gp_lock;
307 struct mutex tg_pt_gp_transition_mutex;
308 struct se_device *tg_pt_gp_dev;
309 struct config_group tg_pt_gp_group;
310 struct list_head tg_pt_gp_list;
311 struct list_head tg_pt_gp_lun_list;
312 struct se_lun *tg_pt_gp_alua_lun;
313 struct se_node_acl *tg_pt_gp_alua_nacl;
314};
315
316struct t10_vpd {
317 unsigned char device_identifier[INQUIRY_VPD_DEVICE_IDENTIFIER_LEN];
318 int protocol_identifier_set;
319 u32 protocol_identifier;
320 u32 device_identifier_code_set;
321 u32 association;
322 u32 device_identifier_type;
323 struct list_head vpd_list;
324};
325
326struct t10_wwn {
327 /*
328 * SCSI left aligned strings may not be null terminated. +1 to ensure a
329 * null terminator is always present.
330 */
331 char vendor[INQUIRY_VENDOR_LEN + 1];
332 char model[INQUIRY_MODEL_LEN + 1];
333 char revision[INQUIRY_REVISION_LEN + 1];
334 char unit_serial[INQUIRY_VPD_SERIAL_LEN];
335 u32 company_id;
336 spinlock_t t10_vpd_lock;
337 struct se_device *t10_dev;
338 struct config_group t10_wwn_group;
339 struct list_head t10_vpd_list;
340};
341
342struct t10_pr_registration {
343 /* Used for fabrics that contain WWN+ISID */
344#define PR_REG_ISID_LEN 16
345 /* PR_REG_ISID_LEN + ',i,0x' */
346#define PR_REG_ISID_ID_LEN (PR_REG_ISID_LEN + 5)
347 char pr_reg_isid[PR_REG_ISID_LEN];
348 /* Used during APTPL metadata reading */
349#define PR_APTPL_MAX_IPORT_LEN 256
350 unsigned char pr_iport[PR_APTPL_MAX_IPORT_LEN];
351 /* Used during APTPL metadata reading */
352#define PR_APTPL_MAX_TPORT_LEN 256
353 unsigned char pr_tport[PR_APTPL_MAX_TPORT_LEN];
354 u16 pr_aptpl_rpti;
355 u16 pr_reg_tpgt;
356 /* Reservation effects all target ports */
357 int pr_reg_all_tg_pt;
358 /* Activate Persistence across Target Power Loss */
359 int pr_reg_aptpl;
360 int pr_res_holder;
361 int pr_res_type;
362 int pr_res_scope;
363 /* Used for fabric initiator WWPNs using a ISID */
364 bool isid_present_at_reg;
365 u64 pr_res_mapped_lun;
366 u64 pr_aptpl_target_lun;
367 u16 tg_pt_sep_rtpi;
368 u32 pr_res_generation;
369 u64 pr_reg_bin_isid;
370 u64 pr_res_key;
371 atomic_t pr_res_holders;
372 struct se_node_acl *pr_reg_nacl;
373 /* Used by ALL_TG_PT=1 registration with deve->pr_ref taken */
374 struct se_dev_entry *pr_reg_deve;
375 struct list_head pr_reg_list;
376 struct list_head pr_reg_abort_list;
377 struct list_head pr_reg_aptpl_list;
378 struct list_head pr_reg_atp_list;
379 struct list_head pr_reg_atp_mem_list;
380};
381
382struct t10_reservation {
383 /* Reservation effects all target ports */
384 int pr_all_tg_pt;
385 /* Activate Persistence across Target Power Loss enabled
386 * for SCSI device */
387 int pr_aptpl_active;
388#define PR_APTPL_BUF_LEN 262144
389 u32 pr_generation;
390 spinlock_t registration_lock;
391 spinlock_t aptpl_reg_lock;
392 /*
393 * This will always be set by one individual I_T Nexus.
394 * However with all_tg_pt=1, other I_T Nexus from the
395 * same initiator can access PR reg/res info on a different
396 * target port.
397 *
398 * There is also the 'All Registrants' case, where there is
399 * a single *pr_res_holder of the reservation, but all
400 * registrations are considered reservation holders.
401 */
402 struct se_node_acl *pr_res_holder;
403 struct list_head registration_list;
404 struct list_head aptpl_reg_list;
405};
406
407struct se_tmr_req {
408 /* Task Management function to be performed */
409 u8 function;
410 /* Task Management response to send */
411 u8 response;
412 int call_transport;
413 /* Reference to ITT that Task Mgmt should be performed */
414 u64 ref_task_tag;
415 void *fabric_tmr_ptr;
416 struct se_cmd *task_cmd;
417 struct se_device *tmr_dev;
418 struct list_head tmr_list;
419};
420
421enum target_prot_op {
422 TARGET_PROT_NORMAL = 0,
423 TARGET_PROT_DIN_INSERT = (1 << 0),
424 TARGET_PROT_DOUT_INSERT = (1 << 1),
425 TARGET_PROT_DIN_STRIP = (1 << 2),
426 TARGET_PROT_DOUT_STRIP = (1 << 3),
427 TARGET_PROT_DIN_PASS = (1 << 4),
428 TARGET_PROT_DOUT_PASS = (1 << 5),
429};
430
431#define TARGET_PROT_ALL TARGET_PROT_DIN_INSERT | TARGET_PROT_DOUT_INSERT | \
432 TARGET_PROT_DIN_STRIP | TARGET_PROT_DOUT_STRIP | \
433 TARGET_PROT_DIN_PASS | TARGET_PROT_DOUT_PASS
434
435enum target_prot_type {
436 TARGET_DIF_TYPE0_PROT,
437 TARGET_DIF_TYPE1_PROT,
438 TARGET_DIF_TYPE2_PROT,
439 TARGET_DIF_TYPE3_PROT,
440};
441
442/* Emulation for UNIT ATTENTION Interlock Control */
443enum target_ua_intlck_ctrl {
444 TARGET_UA_INTLCK_CTRL_CLEAR = 0,
445 TARGET_UA_INTLCK_CTRL_NO_CLEAR = 1,
446 TARGET_UA_INTLCK_CTRL_ESTABLISH_UA = 2,
447};
448
449enum target_core_dif_check {
450 TARGET_DIF_CHECK_GUARD = 0x1 << 0,
451 TARGET_DIF_CHECK_APPTAG = 0x1 << 1,
452 TARGET_DIF_CHECK_REFTAG = 0x1 << 2,
453};
454
455/* for sam_task_attr */
456#define TCM_SIMPLE_TAG 0x20
457#define TCM_HEAD_TAG 0x21
458#define TCM_ORDERED_TAG 0x22
459#define TCM_ACA_TAG 0x24
460
461struct se_cmd {
462 /* Used for fail with specific sense codes */
463 sense_reason_t sense_reason;
464 /* SAM response code being sent to initiator */
465 u8 scsi_status;
466 u16 scsi_sense_length;
467 unsigned unknown_data_length:1;
468 bool state_active:1;
469 u64 tag; /* SAM command identifier aka task tag */
470 /* Delay for ALUA Active/NonOptimized state access in milliseconds */
471 int alua_nonop_delay;
472 /* See include/linux/dma-mapping.h */
473 enum dma_data_direction data_direction;
474 /* For SAM Task Attribute */
475 int sam_task_attr;
476 /* Used for se_sess->sess_tag_pool */
477 unsigned int map_tag;
478 int map_cpu;
479 /* Transport protocol dependent state, see transport_state_table */
480 enum transport_state_table t_state;
481 /* See se_cmd_flags_table */
482 u32 se_cmd_flags;
483 /* Total size in bytes associated with command */
484 u32 data_length;
485 u32 residual_count;
486 u64 orig_fe_lun;
487 /* Persistent Reservation key */
488 u64 pr_res_key;
489 /* Used for sense data */
490 void *sense_buffer;
491 struct list_head se_delayed_node;
492 struct list_head se_qf_node;
493 struct se_device *se_dev;
494 struct se_lun *se_lun;
495 /* Only used for internal passthrough and legacy TCM fabric modules */
496 struct se_session *se_sess;
497 struct se_tmr_req *se_tmr_req;
498 struct llist_node se_cmd_list;
499 struct completion *free_compl;
500 struct completion *abrt_compl;
501 const struct target_core_fabric_ops *se_tfo;
502 sense_reason_t (*execute_cmd)(struct se_cmd *);
503 sense_reason_t (*transport_complete_callback)(struct se_cmd *, bool, int *);
504 void *protocol_data;
505
506 unsigned char *t_task_cdb;
507 unsigned char __t_task_cdb[TCM_MAX_COMMAND_SIZE];
508 unsigned long long t_task_lba;
509 unsigned int t_task_nolb;
510 unsigned int transport_state;
511#define CMD_T_ABORTED (1 << 0)
512#define CMD_T_ACTIVE (1 << 1)
513#define CMD_T_COMPLETE (1 << 2)
514#define CMD_T_SENT (1 << 4)
515#define CMD_T_STOP (1 << 5)
516#define CMD_T_TAS (1 << 10)
517#define CMD_T_FABRIC_STOP (1 << 11)
518 spinlock_t t_state_lock;
519 struct kref cmd_kref;
520 struct completion t_transport_stop_comp;
521
522 struct work_struct work;
523
524 struct scatterlist *t_data_sg;
525 struct scatterlist *t_data_sg_orig;
526 unsigned int t_data_nents;
527 unsigned int t_data_nents_orig;
528 void *t_data_vmap;
529 struct scatterlist *t_bidi_data_sg;
530 unsigned int t_bidi_data_nents;
531
532 /* Used for lun->lun_ref counting */
533 int lun_ref_active;
534
535 struct list_head state_list;
536
537 /* backend private data */
538 void *priv;
539
540 /* DIF related members */
541 enum target_prot_op prot_op;
542 enum target_prot_type prot_type;
543 u8 prot_checks;
544 bool prot_pto;
545 u32 prot_length;
546 u32 reftag_seed;
547 struct scatterlist *t_prot_sg;
548 unsigned int t_prot_nents;
549 sense_reason_t pi_err;
550 u64 sense_info;
551 /*
552 * CPU LIO will execute the cmd on. Defaults to the CPU the cmd is
553 * initialized on. Drivers can override.
554 */
555 int cpuid;
556};
557
558struct se_ua {
559 u8 ua_asc;
560 u8 ua_ascq;
561 struct list_head ua_nacl_list;
562};
563
564struct se_node_acl {
565 char initiatorname[TRANSPORT_IQN_LEN];
566 /* Used to signal demo mode created ACL, disabled by default */
567 bool dynamic_node_acl;
568 bool dynamic_stop;
569 u32 queue_depth;
570 u32 acl_index;
571 enum target_prot_type saved_prot_type;
572#define MAX_ACL_TAG_SIZE 64
573 char acl_tag[MAX_ACL_TAG_SIZE];
574 /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
575 atomic_t acl_pr_ref_count;
576 struct hlist_head lun_entry_hlist;
577 struct se_session *nacl_sess;
578 struct se_portal_group *se_tpg;
579 struct mutex lun_entry_mutex;
580 spinlock_t nacl_sess_lock;
581 struct config_group acl_group;
582 struct config_group acl_attrib_group;
583 struct config_group acl_auth_group;
584 struct config_group acl_param_group;
585 struct config_group acl_fabric_stat_group;
586 struct list_head acl_list;
587 struct list_head acl_sess_list;
588 struct completion acl_free_comp;
589 struct kref acl_kref;
590};
591
592static inline struct se_node_acl *acl_to_nacl(struct config_item *item)
593{
594 return container_of(to_config_group(item), struct se_node_acl,
595 acl_group);
596}
597
598static inline struct se_node_acl *attrib_to_nacl(struct config_item *item)
599{
600 return container_of(to_config_group(item), struct se_node_acl,
601 acl_attrib_group);
602}
603
604static inline struct se_node_acl *auth_to_nacl(struct config_item *item)
605{
606 return container_of(to_config_group(item), struct se_node_acl,
607 acl_auth_group);
608}
609
610static inline struct se_node_acl *param_to_nacl(struct config_item *item)
611{
612 return container_of(to_config_group(item), struct se_node_acl,
613 acl_param_group);
614}
615
616static inline struct se_node_acl *fabric_stat_to_nacl(struct config_item *item)
617{
618 return container_of(to_config_group(item), struct se_node_acl,
619 acl_fabric_stat_group);
620}
621
622struct se_session {
623 atomic_t stopped;
624 u64 sess_bin_isid;
625 enum target_prot_op sup_prot_ops;
626 enum target_prot_type sess_prot_type;
627 struct se_node_acl *se_node_acl;
628 struct se_portal_group *se_tpg;
629 void *fabric_sess_ptr;
630 struct percpu_ref cmd_count;
631 struct list_head sess_list;
632 struct list_head sess_acl_list;
633 spinlock_t sess_cmd_lock;
634 wait_queue_head_t cmd_count_wq;
635 struct completion stop_done;
636 void *sess_cmd_map;
637 struct sbitmap_queue sess_tag_pool;
638};
639
640struct se_device;
641struct se_transform_info;
642struct scatterlist;
643
644struct se_ml_stat_grps {
645 struct config_group stat_group;
646 struct config_group scsi_auth_intr_group;
647 struct config_group scsi_att_intr_port_group;
648};
649
650struct se_lun_acl {
651 u64 mapped_lun;
652 struct se_node_acl *se_lun_nacl;
653 struct se_lun *se_lun;
654 struct config_group se_lun_group;
655 struct se_ml_stat_grps ml_stat_grps;
656};
657
658struct se_dev_entry {
659 u64 mapped_lun;
660 u64 pr_res_key;
661 u64 creation_time;
662 bool lun_access_ro;
663 u32 attach_count;
664 atomic_long_t total_cmds;
665 atomic_long_t read_bytes;
666 atomic_long_t write_bytes;
667 /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
668 struct kref pr_kref;
669 struct completion pr_comp;
670 struct se_lun_acl *se_lun_acl;
671 spinlock_t ua_lock;
672 struct se_lun *se_lun;
673#define DEF_PR_REG_ACTIVE 1
674 unsigned long deve_flags;
675 struct list_head alua_port_list;
676 struct list_head lun_link;
677 struct list_head ua_list;
678 struct hlist_node link;
679 struct rcu_head rcu_head;
680};
681
682struct se_dev_attrib {
683 bool emulate_model_alias;
684 bool emulate_dpo; /* deprecated */
685 bool emulate_fua_write;
686 bool emulate_fua_read; /* deprecated */
687 bool emulate_write_cache;
688 enum target_ua_intlck_ctrl emulate_ua_intlck_ctrl;
689 bool emulate_tas;
690 bool emulate_tpu;
691 bool emulate_tpws;
692 bool emulate_caw;
693 bool emulate_3pc;
694 bool emulate_pr;
695 bool emulate_rsoc;
696 enum target_prot_type pi_prot_type;
697 enum target_prot_type hw_pi_prot_type;
698 bool pi_prot_verify;
699 bool enforce_pr_isids;
700 bool force_pr_aptpl;
701 bool is_nonrot;
702 bool emulate_rest_reord;
703 bool unmap_zeroes_data;
704 u32 hw_block_size;
705 u32 block_size;
706 u32 hw_max_sectors;
707 u32 optimal_sectors;
708 u32 hw_queue_depth;
709 u32 queue_depth;
710 u32 max_unmap_lba_count;
711 u32 max_unmap_block_desc_count;
712 u32 unmap_granularity;
713 u32 unmap_granularity_alignment;
714 u32 max_write_same_len;
715 struct se_device *da_dev;
716 struct config_group da_group;
717};
718
719struct se_port_stat_grps {
720 struct config_group stat_group;
721 struct config_group scsi_port_group;
722 struct config_group scsi_tgt_port_group;
723 struct config_group scsi_transport_group;
724};
725
726struct scsi_port_stats {
727 atomic_long_t cmd_pdus;
728 atomic_long_t tx_data_octets;
729 atomic_long_t rx_data_octets;
730};
731
732struct se_lun {
733 u64 unpacked_lun;
734 bool lun_shutdown;
735 bool lun_access_ro;
736 u32 lun_index;
737
738 /* RELATIVE TARGET PORT IDENTIFER */
739 u16 lun_rtpi;
740 atomic_t lun_acl_count;
741 struct se_device __rcu *lun_se_dev;
742
743 struct list_head lun_deve_list;
744 spinlock_t lun_deve_lock;
745
746 /* ALUA state */
747 int lun_tg_pt_secondary_stat;
748 int lun_tg_pt_secondary_write_md;
749 atomic_t lun_tg_pt_secondary_offline;
750 struct mutex lun_tg_pt_md_mutex;
751
752 /* ALUA target port group linkage */
753 struct list_head lun_tg_pt_gp_link;
754 struct t10_alua_tg_pt_gp __rcu *lun_tg_pt_gp;
755 spinlock_t lun_tg_pt_gp_lock;
756
757 struct se_portal_group *lun_tpg;
758 struct scsi_port_stats lun_stats;
759 struct config_group lun_group;
760 struct se_port_stat_grps port_stat_grps;
761 struct completion lun_shutdown_comp;
762 struct percpu_ref lun_ref;
763 struct list_head lun_dev_link;
764 struct hlist_node link;
765 struct rcu_head rcu_head;
766};
767
768struct se_dev_stat_grps {
769 struct config_group stat_group;
770 struct config_group scsi_dev_group;
771 struct config_group scsi_tgt_dev_group;
772 struct config_group scsi_lu_group;
773};
774
775struct se_cmd_queue {
776 struct llist_head cmd_list;
777 struct work_struct work;
778};
779
780struct se_dev_plug {
781 struct se_device *se_dev;
782};
783
784struct se_device_queue {
785 struct list_head state_list;
786 spinlock_t lock;
787 struct se_cmd_queue sq;
788};
789
790struct se_device {
791 /* RELATIVE TARGET PORT IDENTIFER Counter */
792 u16 dev_rpti_counter;
793 /* Used for SAM Task Attribute ordering */
794 u32 dev_cur_ordered_id;
795 u32 dev_flags;
796#define DF_CONFIGURED 0x00000001
797#define DF_FIRMWARE_VPD_UNIT_SERIAL 0x00000002
798#define DF_EMULATED_VPD_UNIT_SERIAL 0x00000004
799#define DF_USING_UDEV_PATH 0x00000008
800#define DF_USING_ALIAS 0x00000010
801#define DF_READ_ONLY 0x00000020
802 u8 transport_flags;
803 /* Physical device queue depth */
804 u32 queue_depth;
805 /* Used for SPC-2 reservations enforce of ISIDs */
806 u64 dev_res_bin_isid;
807 /* Pointer to transport specific device structure */
808 u32 dev_index;
809 u64 creation_time;
810 atomic_long_t num_resets;
811 atomic_long_t aborts_complete;
812 atomic_long_t aborts_no_task;
813 atomic_long_t num_cmds;
814 atomic_long_t read_bytes;
815 atomic_long_t write_bytes;
816 /* Active commands on this virtual SE device */
817 atomic_t non_ordered;
818 bool ordered_sync_in_progress;
819 atomic_t delayed_cmd_count;
820 atomic_t dev_qf_count;
821 u32 export_count;
822 spinlock_t delayed_cmd_lock;
823 spinlock_t dev_reservation_lock;
824 unsigned int dev_reservation_flags;
825#define DRF_SPC2_RESERVATIONS 0x00000001
826#define DRF_SPC2_RESERVATIONS_WITH_ISID 0x00000002
827 spinlock_t se_port_lock;
828 spinlock_t se_tmr_lock;
829 spinlock_t qf_cmd_lock;
830 struct semaphore caw_sem;
831 /* Used for legacy SPC-2 reservations */
832 struct se_session *reservation_holder;
833 /* Used for ALUA Logical Unit Group membership */
834 struct t10_alua_lu_gp_member *dev_alua_lu_gp_mem;
835 /* Used for SPC-3 Persistent Reservations */
836 struct t10_pr_registration *dev_pr_res_holder;
837 struct list_head dev_sep_list;
838 struct list_head dev_tmr_list;
839 struct work_struct qf_work_queue;
840 struct work_struct delayed_cmd_work;
841 struct list_head delayed_cmd_list;
842 struct list_head qf_cmd_list;
843 /* Pointer to associated SE HBA */
844 struct se_hba *se_hba;
845 /* T10 Inquiry and VPD WWN Information */
846 struct t10_wwn t10_wwn;
847 /* T10 Asymmetric Logical Unit Assignment for Target Ports */
848 struct t10_alua t10_alua;
849 /* T10 SPC-2 + SPC-3 Reservations */
850 struct t10_reservation t10_pr;
851 struct se_dev_attrib dev_attrib;
852 struct config_group dev_action_group;
853 struct config_group dev_group;
854 struct config_group dev_pr_group;
855 struct se_dev_stat_grps dev_stat_grps;
856#define SE_DEV_ALIAS_LEN 512 /* must be less than PAGE_SIZE */
857 unsigned char dev_alias[SE_DEV_ALIAS_LEN];
858#define SE_UDEV_PATH_LEN 512 /* must be less than PAGE_SIZE */
859 unsigned char udev_path[SE_UDEV_PATH_LEN];
860 /* Pointer to template of function pointers for transport */
861 const struct target_backend_ops *transport;
862 struct se_lun xcopy_lun;
863 /* Protection Information */
864 int prot_length;
865 /* For se_lun->lun_se_dev RCU read-side critical access */
866 u32 hba_index;
867 struct rcu_head rcu_head;
868 int queue_cnt;
869 struct se_device_queue *queues;
870};
871
872struct target_opcode_descriptor {
873 u8 support:3;
874 u8 serv_action_valid:1;
875 u8 opcode;
876 u16 service_action;
877 u32 cdb_size;
878 u8 specific_timeout;
879 u16 nominal_timeout;
880 u16 recommended_timeout;
881 bool (*enabled)(struct se_cmd *cmd);
882 void (*update_usage_bits)(u8 *usage_bits,
883 struct se_device *dev);
884 u8 usage_bits[];
885};
886
887struct se_hba {
888 u16 hba_tpgt;
889 u32 hba_id;
890 /* See hba_flags_table */
891 u32 hba_flags;
892 /* Virtual iSCSI devices attached. */
893 u32 dev_count;
894 u32 hba_index;
895 /* Pointer to transport specific host structure. */
896 void *hba_ptr;
897 struct list_head hba_node;
898 spinlock_t device_lock;
899 struct config_group hba_group;
900 struct mutex hba_access_mutex;
901 struct target_backend *backend;
902};
903
904struct se_tpg_np {
905 struct se_portal_group *tpg_np_parent;
906 struct config_group tpg_np_group;
907};
908
909static inline struct se_tpg_np *to_tpg_np(struct config_item *item)
910{
911 return container_of(to_config_group(item), struct se_tpg_np,
912 tpg_np_group);
913}
914
915struct se_portal_group {
916 /*
917 * PROTOCOL IDENTIFIER value per SPC4, 7.5.1.
918 *
919 * Negative values can be used by fabric drivers for internal use TPGs.
920 */
921 int proto_id;
922 bool enabled;
923 /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
924 atomic_t tpg_pr_ref_count;
925 /* Spinlock for adding/removing ACLed Nodes */
926 struct mutex acl_node_mutex;
927 /* Spinlock for adding/removing sessions */
928 spinlock_t session_lock;
929 struct mutex tpg_lun_mutex;
930 /* linked list for initiator ACL list */
931 struct list_head acl_node_list;
932 struct hlist_head tpg_lun_hlist;
933 struct se_lun *tpg_virt_lun0;
934 /* List of TCM sessions associated wth this TPG */
935 struct list_head tpg_sess_list;
936 /* Pointer to $FABRIC_MOD dependent code */
937 const struct target_core_fabric_ops *se_tpg_tfo;
938 struct se_wwn *se_tpg_wwn;
939 struct config_group tpg_group;
940 struct config_group tpg_lun_group;
941 struct config_group tpg_np_group;
942 struct config_group tpg_acl_group;
943 struct config_group tpg_attrib_group;
944 struct config_group tpg_auth_group;
945 struct config_group tpg_param_group;
946};
947
948static inline struct se_portal_group *to_tpg(struct config_item *item)
949{
950 return container_of(to_config_group(item), struct se_portal_group,
951 tpg_group);
952}
953
954static inline struct se_portal_group *attrib_to_tpg(struct config_item *item)
955{
956 return container_of(to_config_group(item), struct se_portal_group,
957 tpg_attrib_group);
958}
959
960static inline struct se_portal_group *auth_to_tpg(struct config_item *item)
961{
962 return container_of(to_config_group(item), struct se_portal_group,
963 tpg_auth_group);
964}
965
966static inline struct se_portal_group *param_to_tpg(struct config_item *item)
967{
968 return container_of(to_config_group(item), struct se_portal_group,
969 tpg_param_group);
970}
971
972enum {
973 /* Use se_cmd's cpuid for completion */
974 SE_COMPL_AFFINITY_CPUID = -1,
975 /* Complete on current CPU */
976 SE_COMPL_AFFINITY_CURR_CPU = -2,
977};
978
979struct se_wwn {
980 struct target_fabric_configfs *wwn_tf;
981 void *priv;
982 struct config_group wwn_group;
983 struct config_group fabric_stat_group;
984 struct config_group param_group;
985 int cmd_compl_affinity;
986};
987
988static inline void atomic_inc_mb(atomic_t *v)
989{
990 smp_mb__before_atomic();
991 atomic_inc(v);
992 smp_mb__after_atomic();
993}
994
995static inline void atomic_dec_mb(atomic_t *v)
996{
997 smp_mb__before_atomic();
998 atomic_dec(v);
999 smp_mb__after_atomic();
1000}
1001
1002static inline void target_free_tag(struct se_session *sess, struct se_cmd *cmd)
1003{
1004 sbitmap_queue_clear(&sess->sess_tag_pool, cmd->map_tag, cmd->map_cpu);
1005}
1006
1007#endif /* TARGET_CORE_BASE_H */