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 UNIT ATTENTION Interlock Control */
78 #define DA_EMULATE_UA_INTLLCK_CTRL 0
79 /* Emulation for TASK_ABORTED status (TAS) by default */
80 #define DA_EMULATE_TAS 1
81 /* Emulation for Thin Provisioning UNMAP using block/blk-lib.c:blkdev_issue_discard() */
82 #define DA_EMULATE_TPU 0
83 /*
84 * Emulation for Thin Provisioning WRITE_SAME w/ UNMAP=1 bit using
85 * block/blk-lib.c:blkdev_issue_discard()
86 */
87 #define DA_EMULATE_TPWS 0
88 /* Emulation for CompareAndWrite (AtomicTestandSet) by default */
89 #define DA_EMULATE_CAW 1
90 /* Emulation for 3rd Party Copy (ExtendedCopy) by default */
91 #define DA_EMULATE_3PC 1
92 /* No Emulation for PSCSI by default */
93 #define DA_EMULATE_ALUA 0
94 /* Emulate SCSI2 RESERVE/RELEASE and Persistent Reservations by default */
95 #define DA_EMULATE_PR 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 */
112 enum 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 */
118 enum 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 */
131 enum se_cmd_flags_table {
132 SCF_SUPPORTED_SAM_OPCODE = 0x00000001,
133 SCF_TRANSPORT_TASK_SENSE = 0x00000002,
134 SCF_EMULATED_TASK_SENSE = 0x00000004,
135 SCF_SCSI_DATA_CDB = 0x00000008,
136 SCF_SCSI_TMR_CDB = 0x00000010,
137 SCF_FUA = 0x00000080,
138 SCF_SE_LUN_CMD = 0x00000100,
139 SCF_BIDI = 0x00000400,
140 SCF_SENT_CHECK_CONDITION = 0x00000800,
141 SCF_OVERFLOW_BIT = 0x00001000,
142 SCF_UNDERFLOW_BIT = 0x00002000,
143 SCF_ALUA_NON_OPTIMIZED = 0x00008000,
144 SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC = 0x00020000,
145 SCF_COMPARE_AND_WRITE = 0x00080000,
146 SCF_PASSTHROUGH_PROT_SG_TO_MEM_NOALLOC = 0x00200000,
147 SCF_ACK_KREF = 0x00400000,
148 SCF_USE_CPUID = 0x00800000,
149 SCF_TASK_ATTR_SET = 0x01000000,
150 SCF_TREAT_READ_AS_NORMAL = 0x02000000,
151 };
152
153 /*
154 * Used by transport_send_check_condition_and_sense()
155 * to signal which ASC/ASCQ sense payload should be built.
156 */
157 typedef unsigned __bitwise sense_reason_t;
158
159 enum 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 TCM_CHECK_CONDITION_NOT_READY = R(0x0f),
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 #undef R
193 };
194
195 enum target_sc_flags_table {
196 TARGET_SCF_BIDI_OP = 0x01,
197 TARGET_SCF_ACK_KREF = 0x02,
198 TARGET_SCF_UNKNOWN_SIZE = 0x04,
199 TARGET_SCF_USE_CPUID = 0x08,
200 TARGET_SCF_LOOKUP_LUN_FROM_TAG = 0x10,
201 };
202
203 /* fabric independent task management function values */
204 enum tcm_tmreq_table {
205 TMR_ABORT_TASK = 1,
206 TMR_ABORT_TASK_SET = 2,
207 TMR_CLEAR_ACA = 3,
208 TMR_CLEAR_TASK_SET = 4,
209 TMR_LUN_RESET = 5,
210 TMR_TARGET_WARM_RESET = 6,
211 TMR_TARGET_COLD_RESET = 7,
212 TMR_UNKNOWN = 0xff,
213 };
214
215 /* fabric independent task management response values */
216 enum tcm_tmrsp_table {
217 TMR_FUNCTION_FAILED = 0,
218 TMR_FUNCTION_COMPLETE = 1,
219 TMR_TASK_DOES_NOT_EXIST = 2,
220 TMR_LUN_DOES_NOT_EXIST = 3,
221 TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED = 4,
222 TMR_FUNCTION_REJECTED = 5,
223 };
224
225 /*
226 * Used for target SCSI statistics
227 */
228 typedef enum {
229 SCSI_INST_INDEX,
230 SCSI_AUTH_INTR_INDEX,
231 SCSI_INDEX_TYPE_MAX
232 } scsi_index_t;
233
234 struct se_cmd;
235
236 struct t10_alua_lba_map_member {
237 struct list_head lba_map_mem_list;
238 int lba_map_mem_alua_state;
239 int lba_map_mem_alua_pg_id;
240 };
241
242 struct t10_alua_lba_map {
243 u64 lba_map_first_lba;
244 u64 lba_map_last_lba;
245 struct list_head lba_map_list;
246 struct list_head lba_map_mem_list;
247 };
248
249 struct t10_alua {
250 /* ALUA Target Port Group ID */
251 u16 alua_tg_pt_gps_counter;
252 u32 alua_tg_pt_gps_count;
253 /* Referrals support */
254 spinlock_t lba_map_lock;
255 u32 lba_map_segment_size;
256 u32 lba_map_segment_multiplier;
257 struct list_head lba_map_list;
258 spinlock_t tg_pt_gps_lock;
259 struct se_device *t10_dev;
260 /* Used for default ALUA Target Port Group */
261 struct t10_alua_tg_pt_gp *default_tg_pt_gp;
262 /* Used for default ALUA Target Port Group ConfigFS group */
263 struct config_group alua_tg_pt_gps_group;
264 struct list_head tg_pt_gps_list;
265 };
266
267 struct t10_alua_lu_gp {
268 u16 lu_gp_id;
269 int lu_gp_valid_id;
270 u32 lu_gp_members;
271 atomic_t lu_gp_ref_cnt;
272 spinlock_t lu_gp_lock;
273 struct config_group lu_gp_group;
274 struct list_head lu_gp_node;
275 struct list_head lu_gp_mem_list;
276 };
277
278 struct t10_alua_lu_gp_member {
279 bool lu_gp_assoc;
280 atomic_t lu_gp_mem_ref_cnt;
281 spinlock_t lu_gp_mem_lock;
282 struct t10_alua_lu_gp *lu_gp;
283 struct se_device *lu_gp_mem_dev;
284 struct list_head lu_gp_mem_list;
285 };
286
287 struct t10_alua_tg_pt_gp {
288 u16 tg_pt_gp_id;
289 int tg_pt_gp_valid_id;
290 int tg_pt_gp_alua_supported_states;
291 int tg_pt_gp_alua_access_status;
292 int tg_pt_gp_alua_access_type;
293 int tg_pt_gp_nonop_delay_msecs;
294 int tg_pt_gp_trans_delay_msecs;
295 int tg_pt_gp_implicit_trans_secs;
296 int tg_pt_gp_pref;
297 int tg_pt_gp_write_metadata;
298 u32 tg_pt_gp_members;
299 int tg_pt_gp_alua_access_state;
300 atomic_t tg_pt_gp_ref_cnt;
301 spinlock_t tg_pt_gp_lock;
302 struct mutex tg_pt_gp_transition_mutex;
303 struct se_device *tg_pt_gp_dev;
304 struct config_group tg_pt_gp_group;
305 struct list_head tg_pt_gp_list;
306 struct list_head tg_pt_gp_lun_list;
307 struct se_lun *tg_pt_gp_alua_lun;
308 struct se_node_acl *tg_pt_gp_alua_nacl;
309 };
310
311 struct t10_vpd {
312 unsigned char device_identifier[INQUIRY_VPD_DEVICE_IDENTIFIER_LEN];
313 int protocol_identifier_set;
314 u32 protocol_identifier;
315 u32 device_identifier_code_set;
316 u32 association;
317 u32 device_identifier_type;
318 struct list_head vpd_list;
319 };
320
321 struct t10_wwn {
322 /*
323 * SCSI left aligned strings may not be null terminated. +1 to ensure a
324 * null terminator is always present.
325 */
326 char vendor[INQUIRY_VENDOR_LEN + 1];
327 char model[INQUIRY_MODEL_LEN + 1];
328 char revision[INQUIRY_REVISION_LEN + 1];
329 char unit_serial[INQUIRY_VPD_SERIAL_LEN];
330 spinlock_t t10_vpd_lock;
331 struct se_device *t10_dev;
332 struct config_group t10_wwn_group;
333 struct list_head t10_vpd_list;
334 };
335
336 struct t10_pr_registration {
337 /* Used for fabrics that contain WWN+ISID */
338 #define PR_REG_ISID_LEN 16
339 /* PR_REG_ISID_LEN + ',i,0x' */
340 #define PR_REG_ISID_ID_LEN (PR_REG_ISID_LEN + 5)
341 char pr_reg_isid[PR_REG_ISID_LEN];
342 /* Used during APTPL metadata reading */
343 #define PR_APTPL_MAX_IPORT_LEN 256
344 unsigned char pr_iport[PR_APTPL_MAX_IPORT_LEN];
345 /* Used during APTPL metadata reading */
346 #define PR_APTPL_MAX_TPORT_LEN 256
347 unsigned char pr_tport[PR_APTPL_MAX_TPORT_LEN];
348 u16 pr_aptpl_rpti;
349 u16 pr_reg_tpgt;
350 /* Reservation effects all target ports */
351 int pr_reg_all_tg_pt;
352 /* Activate Persistence across Target Power Loss */
353 int pr_reg_aptpl;
354 int pr_res_holder;
355 int pr_res_type;
356 int pr_res_scope;
357 /* Used for fabric initiator WWPNs using a ISID */
358 bool isid_present_at_reg;
359 u64 pr_res_mapped_lun;
360 u64 pr_aptpl_target_lun;
361 u16 tg_pt_sep_rtpi;
362 u32 pr_res_generation;
363 u64 pr_reg_bin_isid;
364 u64 pr_res_key;
365 atomic_t pr_res_holders;
366 struct se_node_acl *pr_reg_nacl;
367 /* Used by ALL_TG_PT=1 registration with deve->pr_ref taken */
368 struct se_dev_entry *pr_reg_deve;
369 struct list_head pr_reg_list;
370 struct list_head pr_reg_abort_list;
371 struct list_head pr_reg_aptpl_list;
372 struct list_head pr_reg_atp_list;
373 struct list_head pr_reg_atp_mem_list;
374 };
375
376 struct t10_reservation {
377 /* Reservation effects all target ports */
378 int pr_all_tg_pt;
379 /* Activate Persistence across Target Power Loss enabled
380 * for SCSI device */
381 int pr_aptpl_active;
382 #define PR_APTPL_BUF_LEN 262144
383 u32 pr_generation;
384 spinlock_t registration_lock;
385 spinlock_t aptpl_reg_lock;
386 /*
387 * This will always be set by one individual I_T Nexus.
388 * However with all_tg_pt=1, other I_T Nexus from the
389 * same initiator can access PR reg/res info on a different
390 * target port.
391 *
392 * There is also the 'All Registrants' case, where there is
393 * a single *pr_res_holder of the reservation, but all
394 * registrations are considered reservation holders.
395 */
396 struct se_node_acl *pr_res_holder;
397 struct list_head registration_list;
398 struct list_head aptpl_reg_list;
399 };
400
401 struct se_tmr_req {
402 /* Task Management function to be performed */
403 u8 function;
404 /* Task Management response to send */
405 u8 response;
406 int call_transport;
407 /* Reference to ITT that Task Mgmt should be performed */
408 u64 ref_task_tag;
409 void *fabric_tmr_ptr;
410 struct se_cmd *task_cmd;
411 struct se_device *tmr_dev;
412 struct list_head tmr_list;
413 };
414
415 enum target_prot_op {
416 TARGET_PROT_NORMAL = 0,
417 TARGET_PROT_DIN_INSERT = (1 << 0),
418 TARGET_PROT_DOUT_INSERT = (1 << 1),
419 TARGET_PROT_DIN_STRIP = (1 << 2),
420 TARGET_PROT_DOUT_STRIP = (1 << 3),
421 TARGET_PROT_DIN_PASS = (1 << 4),
422 TARGET_PROT_DOUT_PASS = (1 << 5),
423 };
424
425 #define TARGET_PROT_ALL TARGET_PROT_DIN_INSERT | TARGET_PROT_DOUT_INSERT | \
426 TARGET_PROT_DIN_STRIP | TARGET_PROT_DOUT_STRIP | \
427 TARGET_PROT_DIN_PASS | TARGET_PROT_DOUT_PASS
428
429 enum target_prot_type {
430 TARGET_DIF_TYPE0_PROT,
431 TARGET_DIF_TYPE1_PROT,
432 TARGET_DIF_TYPE2_PROT,
433 TARGET_DIF_TYPE3_PROT,
434 };
435
436 enum target_core_dif_check {
437 TARGET_DIF_CHECK_GUARD = 0x1 << 0,
438 TARGET_DIF_CHECK_APPTAG = 0x1 << 1,
439 TARGET_DIF_CHECK_REFTAG = 0x1 << 2,
440 };
441
442 /* for sam_task_attr */
443 #define TCM_SIMPLE_TAG 0x20
444 #define TCM_HEAD_TAG 0x21
445 #define TCM_ORDERED_TAG 0x22
446 #define TCM_ACA_TAG 0x24
447
448 struct se_cmd {
449 /* SAM response code being sent to initiator */
450 u8 scsi_status;
451 u8 scsi_asc;
452 u8 scsi_ascq;
453 u16 scsi_sense_length;
454 unsigned unknown_data_length:1;
455 bool state_active:1;
456 u64 tag; /* SAM command identifier aka task tag */
457 /* Delay for ALUA Active/NonOptimized state access in milliseconds */
458 int alua_nonop_delay;
459 /* See include/linux/dma-mapping.h */
460 enum dma_data_direction data_direction;
461 /* For SAM Task Attribute */
462 int sam_task_attr;
463 /* Used for se_sess->sess_tag_pool */
464 unsigned int map_tag;
465 int map_cpu;
466 /* Transport protocol dependent state, see transport_state_table */
467 enum transport_state_table t_state;
468 /* See se_cmd_flags_table */
469 u32 se_cmd_flags;
470 /* Total size in bytes associated with command */
471 u32 data_length;
472 u32 residual_count;
473 u64 orig_fe_lun;
474 /* Persistent Reservation key */
475 u64 pr_res_key;
476 /* Used for sense data */
477 void *sense_buffer;
478 struct list_head se_delayed_node;
479 struct list_head se_qf_node;
480 struct se_device *se_dev;
481 struct se_lun *se_lun;
482 /* Only used for internal passthrough and legacy TCM fabric modules */
483 struct se_session *se_sess;
484 struct se_tmr_req *se_tmr_req;
485 struct list_head se_cmd_list;
486 struct completion *free_compl;
487 struct completion *abrt_compl;
488 const struct target_core_fabric_ops *se_tfo;
489 sense_reason_t (*execute_cmd)(struct se_cmd *);
490 sense_reason_t (*transport_complete_callback)(struct se_cmd *, bool, int *);
491 void *protocol_data;
492
493 unsigned char *t_task_cdb;
494 unsigned char __t_task_cdb[TCM_MAX_COMMAND_SIZE];
495 unsigned long long t_task_lba;
496 unsigned int t_task_nolb;
497 unsigned int transport_state;
498 #define CMD_T_ABORTED (1 << 0)
499 #define CMD_T_ACTIVE (1 << 1)
500 #define CMD_T_COMPLETE (1 << 2)
501 #define CMD_T_SENT (1 << 4)
502 #define CMD_T_STOP (1 << 5)
503 #define CMD_T_TAS (1 << 10)
504 #define CMD_T_FABRIC_STOP (1 << 11)
505 spinlock_t t_state_lock;
506 struct kref cmd_kref;
507 struct completion t_transport_stop_comp;
508
509 struct work_struct work;
510
511 struct scatterlist *t_data_sg;
512 struct scatterlist *t_data_sg_orig;
513 unsigned int t_data_nents;
514 unsigned int t_data_nents_orig;
515 void *t_data_vmap;
516 struct scatterlist *t_bidi_data_sg;
517 unsigned int t_bidi_data_nents;
518
519 /* Used for lun->lun_ref counting */
520 int lun_ref_active;
521
522 struct list_head state_list;
523
524 /* backend private data */
525 void *priv;
526
527 /* DIF related members */
528 enum target_prot_op prot_op;
529 enum target_prot_type prot_type;
530 u8 prot_checks;
531 bool prot_pto;
532 u32 prot_length;
533 u32 reftag_seed;
534 struct scatterlist *t_prot_sg;
535 unsigned int t_prot_nents;
536 sense_reason_t pi_err;
537 sector_t bad_sector;
538 int cpuid;
539 };
540
541 struct se_ua {
542 u8 ua_asc;
543 u8 ua_ascq;
544 struct list_head ua_nacl_list;
545 };
546
547 struct se_node_acl {
548 char initiatorname[TRANSPORT_IQN_LEN];
549 /* Used to signal demo mode created ACL, disabled by default */
550 bool dynamic_node_acl;
551 bool dynamic_stop;
552 u32 queue_depth;
553 u32 acl_index;
554 enum target_prot_type saved_prot_type;
555 #define MAX_ACL_TAG_SIZE 64
556 char acl_tag[MAX_ACL_TAG_SIZE];
557 /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
558 atomic_t acl_pr_ref_count;
559 struct hlist_head lun_entry_hlist;
560 struct se_session *nacl_sess;
561 struct se_portal_group *se_tpg;
562 struct mutex lun_entry_mutex;
563 spinlock_t nacl_sess_lock;
564 struct config_group acl_group;
565 struct config_group acl_attrib_group;
566 struct config_group acl_auth_group;
567 struct config_group acl_param_group;
568 struct config_group acl_fabric_stat_group;
569 struct list_head acl_list;
570 struct list_head acl_sess_list;
571 struct completion acl_free_comp;
572 struct kref acl_kref;
573 };
574
acl_to_nacl(struct config_item * item)575 static inline struct se_node_acl *acl_to_nacl(struct config_item *item)
576 {
577 return container_of(to_config_group(item), struct se_node_acl,
578 acl_group);
579 }
580
attrib_to_nacl(struct config_item * item)581 static inline struct se_node_acl *attrib_to_nacl(struct config_item *item)
582 {
583 return container_of(to_config_group(item), struct se_node_acl,
584 acl_attrib_group);
585 }
586
auth_to_nacl(struct config_item * item)587 static inline struct se_node_acl *auth_to_nacl(struct config_item *item)
588 {
589 return container_of(to_config_group(item), struct se_node_acl,
590 acl_auth_group);
591 }
592
param_to_nacl(struct config_item * item)593 static inline struct se_node_acl *param_to_nacl(struct config_item *item)
594 {
595 return container_of(to_config_group(item), struct se_node_acl,
596 acl_param_group);
597 }
598
fabric_stat_to_nacl(struct config_item * item)599 static inline struct se_node_acl *fabric_stat_to_nacl(struct config_item *item)
600 {
601 return container_of(to_config_group(item), struct se_node_acl,
602 acl_fabric_stat_group);
603 }
604
605 struct se_session {
606 unsigned sess_tearing_down:1;
607 u64 sess_bin_isid;
608 enum target_prot_op sup_prot_ops;
609 enum target_prot_type sess_prot_type;
610 struct se_node_acl *se_node_acl;
611 struct se_portal_group *se_tpg;
612 void *fabric_sess_ptr;
613 struct percpu_ref cmd_count;
614 struct list_head sess_list;
615 struct list_head sess_acl_list;
616 struct list_head sess_cmd_list;
617 spinlock_t sess_cmd_lock;
618 wait_queue_head_t cmd_list_wq;
619 void *sess_cmd_map;
620 struct sbitmap_queue sess_tag_pool;
621 };
622
623 struct se_device;
624 struct se_transform_info;
625 struct scatterlist;
626
627 struct se_ml_stat_grps {
628 struct config_group stat_group;
629 struct config_group scsi_auth_intr_group;
630 struct config_group scsi_att_intr_port_group;
631 };
632
633 struct se_lun_acl {
634 u64 mapped_lun;
635 struct se_node_acl *se_lun_nacl;
636 struct se_lun *se_lun;
637 struct config_group se_lun_group;
638 struct se_ml_stat_grps ml_stat_grps;
639 };
640
641 struct se_dev_entry {
642 u64 mapped_lun;
643 u64 pr_res_key;
644 u64 creation_time;
645 bool lun_access_ro;
646 u32 attach_count;
647 atomic_long_t total_cmds;
648 atomic_long_t read_bytes;
649 atomic_long_t write_bytes;
650 /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
651 struct kref pr_kref;
652 struct completion pr_comp;
653 struct se_lun_acl __rcu *se_lun_acl;
654 spinlock_t ua_lock;
655 struct se_lun __rcu *se_lun;
656 #define DEF_PR_REG_ACTIVE 1
657 unsigned long deve_flags;
658 struct list_head alua_port_list;
659 struct list_head lun_link;
660 struct list_head ua_list;
661 struct hlist_node link;
662 struct rcu_head rcu_head;
663 };
664
665 struct se_dev_attrib {
666 int emulate_model_alias;
667 int emulate_dpo;
668 int emulate_fua_write;
669 int emulate_fua_read;
670 int emulate_write_cache;
671 int emulate_ua_intlck_ctrl;
672 int emulate_tas;
673 int emulate_tpu;
674 int emulate_tpws;
675 int emulate_caw;
676 int emulate_3pc;
677 int emulate_pr;
678 enum target_prot_type pi_prot_type;
679 enum target_prot_type hw_pi_prot_type;
680 int pi_prot_verify;
681 int enforce_pr_isids;
682 int force_pr_aptpl;
683 int is_nonrot;
684 int emulate_rest_reord;
685 int unmap_zeroes_data;
686 u32 hw_block_size;
687 u32 block_size;
688 u32 hw_max_sectors;
689 u32 optimal_sectors;
690 u32 hw_queue_depth;
691 u32 queue_depth;
692 u32 max_unmap_lba_count;
693 u32 max_unmap_block_desc_count;
694 u32 unmap_granularity;
695 u32 unmap_granularity_alignment;
696 u32 max_write_same_len;
697 u32 max_bytes_per_io;
698 struct se_device *da_dev;
699 struct config_group da_group;
700 };
701
702 struct se_port_stat_grps {
703 struct config_group stat_group;
704 struct config_group scsi_port_group;
705 struct config_group scsi_tgt_port_group;
706 struct config_group scsi_transport_group;
707 };
708
709 struct scsi_port_stats {
710 atomic_long_t cmd_pdus;
711 atomic_long_t tx_data_octets;
712 atomic_long_t rx_data_octets;
713 };
714
715 struct se_lun {
716 u64 unpacked_lun;
717 bool lun_shutdown;
718 bool lun_access_ro;
719 u32 lun_index;
720
721 /* RELATIVE TARGET PORT IDENTIFER */
722 u16 lun_rtpi;
723 atomic_t lun_acl_count;
724 struct se_device __rcu *lun_se_dev;
725
726 struct list_head lun_deve_list;
727 spinlock_t lun_deve_lock;
728
729 /* ALUA state */
730 int lun_tg_pt_secondary_stat;
731 int lun_tg_pt_secondary_write_md;
732 atomic_t lun_tg_pt_secondary_offline;
733 struct mutex lun_tg_pt_md_mutex;
734
735 /* ALUA target port group linkage */
736 struct list_head lun_tg_pt_gp_link;
737 struct t10_alua_tg_pt_gp *lun_tg_pt_gp;
738 spinlock_t lun_tg_pt_gp_lock;
739
740 struct se_portal_group *lun_tpg;
741 struct scsi_port_stats lun_stats;
742 struct config_group lun_group;
743 struct se_port_stat_grps port_stat_grps;
744 struct completion lun_shutdown_comp;
745 struct percpu_ref lun_ref;
746 struct list_head lun_dev_link;
747 struct hlist_node link;
748 struct rcu_head rcu_head;
749 };
750
751 struct se_dev_stat_grps {
752 struct config_group stat_group;
753 struct config_group scsi_dev_group;
754 struct config_group scsi_tgt_dev_group;
755 struct config_group scsi_lu_group;
756 };
757
758 struct se_device {
759 /* RELATIVE TARGET PORT IDENTIFER Counter */
760 u16 dev_rpti_counter;
761 /* Used for SAM Task Attribute ordering */
762 u32 dev_cur_ordered_id;
763 u32 dev_flags;
764 #define DF_CONFIGURED 0x00000001
765 #define DF_FIRMWARE_VPD_UNIT_SERIAL 0x00000002
766 #define DF_EMULATED_VPD_UNIT_SERIAL 0x00000004
767 #define DF_USING_UDEV_PATH 0x00000008
768 #define DF_USING_ALIAS 0x00000010
769 #define DF_READ_ONLY 0x00000020
770 /* Physical device queue depth */
771 u32 queue_depth;
772 /* Used for SPC-2 reservations enforce of ISIDs */
773 u64 dev_res_bin_isid;
774 /* Pointer to transport specific device structure */
775 u32 dev_index;
776 u64 creation_time;
777 atomic_long_t num_resets;
778 atomic_long_t aborts_complete;
779 atomic_long_t aborts_no_task;
780 atomic_long_t num_cmds;
781 atomic_long_t read_bytes;
782 atomic_long_t write_bytes;
783 /* Active commands on this virtual SE device */
784 atomic_t simple_cmds;
785 atomic_t dev_ordered_sync;
786 atomic_t dev_qf_count;
787 u32 export_count;
788 spinlock_t delayed_cmd_lock;
789 spinlock_t execute_task_lock;
790 spinlock_t dev_reservation_lock;
791 unsigned int dev_reservation_flags;
792 #define DRF_SPC2_RESERVATIONS 0x00000001
793 #define DRF_SPC2_RESERVATIONS_WITH_ISID 0x00000002
794 spinlock_t se_port_lock;
795 spinlock_t se_tmr_lock;
796 spinlock_t qf_cmd_lock;
797 struct semaphore caw_sem;
798 /* Used for legacy SPC-2 reservations */
799 struct se_session *reservation_holder;
800 /* Used for ALUA Logical Unit Group membership */
801 struct t10_alua_lu_gp_member *dev_alua_lu_gp_mem;
802 /* Used for SPC-3 Persistent Reservations */
803 struct t10_pr_registration *dev_pr_res_holder;
804 struct list_head dev_sep_list;
805 struct list_head dev_tmr_list;
806 struct work_struct qf_work_queue;
807 struct list_head delayed_cmd_list;
808 struct list_head state_list;
809 struct list_head qf_cmd_list;
810 /* Pointer to associated SE HBA */
811 struct se_hba *se_hba;
812 /* T10 Inquiry and VPD WWN Information */
813 struct t10_wwn t10_wwn;
814 /* T10 Asymmetric Logical Unit Assignment for Target Ports */
815 struct t10_alua t10_alua;
816 /* T10 SPC-2 + SPC-3 Reservations */
817 struct t10_reservation t10_pr;
818 struct se_dev_attrib dev_attrib;
819 struct config_group dev_action_group;
820 struct config_group dev_group;
821 struct config_group dev_pr_group;
822 struct se_dev_stat_grps dev_stat_grps;
823 #define SE_DEV_ALIAS_LEN 512 /* must be less than PAGE_SIZE */
824 unsigned char dev_alias[SE_DEV_ALIAS_LEN];
825 #define SE_UDEV_PATH_LEN 512 /* must be less than PAGE_SIZE */
826 unsigned char udev_path[SE_UDEV_PATH_LEN];
827 /* Pointer to template of function pointers for transport */
828 const struct target_backend_ops *transport;
829 struct se_lun xcopy_lun;
830 /* Protection Information */
831 int prot_length;
832 /* For se_lun->lun_se_dev RCU read-side critical access */
833 u32 hba_index;
834 struct rcu_head rcu_head;
835 };
836
837 struct se_hba {
838 u16 hba_tpgt;
839 u32 hba_id;
840 /* See hba_flags_table */
841 u32 hba_flags;
842 /* Virtual iSCSI devices attached. */
843 u32 dev_count;
844 u32 hba_index;
845 /* Pointer to transport specific host structure. */
846 void *hba_ptr;
847 struct list_head hba_node;
848 spinlock_t device_lock;
849 struct config_group hba_group;
850 struct mutex hba_access_mutex;
851 struct target_backend *backend;
852 };
853
854 struct se_tpg_np {
855 struct se_portal_group *tpg_np_parent;
856 struct config_group tpg_np_group;
857 };
858
to_tpg_np(struct config_item * item)859 static inline struct se_tpg_np *to_tpg_np(struct config_item *item)
860 {
861 return container_of(to_config_group(item), struct se_tpg_np,
862 tpg_np_group);
863 }
864
865 struct se_portal_group {
866 /*
867 * PROTOCOL IDENTIFIER value per SPC4, 7.5.1.
868 *
869 * Negative values can be used by fabric drivers for internal use TPGs.
870 */
871 int proto_id;
872 /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
873 atomic_t tpg_pr_ref_count;
874 /* Spinlock for adding/removing ACLed Nodes */
875 struct mutex acl_node_mutex;
876 /* Spinlock for adding/removing sessions */
877 spinlock_t session_lock;
878 struct mutex tpg_lun_mutex;
879 struct list_head se_tpg_node;
880 /* linked list for initiator ACL list */
881 struct list_head acl_node_list;
882 struct hlist_head tpg_lun_hlist;
883 struct se_lun *tpg_virt_lun0;
884 /* List of TCM sessions associated wth this TPG */
885 struct list_head tpg_sess_list;
886 /* Pointer to $FABRIC_MOD dependent code */
887 const struct target_core_fabric_ops *se_tpg_tfo;
888 struct se_wwn *se_tpg_wwn;
889 struct config_group tpg_group;
890 struct config_group tpg_lun_group;
891 struct config_group tpg_np_group;
892 struct config_group tpg_acl_group;
893 struct config_group tpg_attrib_group;
894 struct config_group tpg_auth_group;
895 struct config_group tpg_param_group;
896 };
897
to_tpg(struct config_item * item)898 static inline struct se_portal_group *to_tpg(struct config_item *item)
899 {
900 return container_of(to_config_group(item), struct se_portal_group,
901 tpg_group);
902 }
903
attrib_to_tpg(struct config_item * item)904 static inline struct se_portal_group *attrib_to_tpg(struct config_item *item)
905 {
906 return container_of(to_config_group(item), struct se_portal_group,
907 tpg_attrib_group);
908 }
909
auth_to_tpg(struct config_item * item)910 static inline struct se_portal_group *auth_to_tpg(struct config_item *item)
911 {
912 return container_of(to_config_group(item), struct se_portal_group,
913 tpg_auth_group);
914 }
915
param_to_tpg(struct config_item * item)916 static inline struct se_portal_group *param_to_tpg(struct config_item *item)
917 {
918 return container_of(to_config_group(item), struct se_portal_group,
919 tpg_param_group);
920 }
921
922 struct se_wwn {
923 struct target_fabric_configfs *wwn_tf;
924 void *priv;
925 struct config_group wwn_group;
926 struct config_group fabric_stat_group;
927 };
928
atomic_inc_mb(atomic_t * v)929 static inline void atomic_inc_mb(atomic_t *v)
930 {
931 smp_mb__before_atomic();
932 atomic_inc(v);
933 smp_mb__after_atomic();
934 }
935
atomic_dec_mb(atomic_t * v)936 static inline void atomic_dec_mb(atomic_t *v)
937 {
938 smp_mb__before_atomic();
939 atomic_dec(v);
940 smp_mb__after_atomic();
941 }
942
target_free_tag(struct se_session * sess,struct se_cmd * cmd)943 static inline void target_free_tag(struct se_session *sess, struct se_cmd *cmd)
944 {
945 sbitmap_queue_clear(&sess->sess_tag_pool, cmd->map_tag, cmd->map_cpu);
946 }
947
948 #endif /* TARGET_CORE_BASE_H */
949
