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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/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 */
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 = 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 */
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 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
195enum 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 */
204enum 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 */
216enum 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 */
228typedef enum {
229 SCSI_INST_INDEX,
230 SCSI_AUTH_INTR_INDEX,
231 SCSI_INDEX_TYPE_MAX
232} scsi_index_t;
233
234struct se_cmd;
235
236struct 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
242struct 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
249struct 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
267struct 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
278struct 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
287struct 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
311struct 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
321struct 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
336struct 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
376struct 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
401struct 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
415enum 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
429enum 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
436enum 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
448struct 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
541struct se_ua {
542 u8 ua_asc;
543 u8 ua_ascq;
544 struct list_head ua_nacl_list;
545};
546
547struct 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
575static 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
581static 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
587static 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
593static 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
599static 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
605struct 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
623struct se_device;
624struct se_transform_info;
625struct scatterlist;
626
627struct 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
633struct 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
641struct 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
665struct 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
702struct 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
709struct 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
715struct 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
751struct 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
758struct 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
837struct 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
854struct se_tpg_np {
855 struct se_portal_group *tpg_np_parent;
856 struct config_group tpg_np_group;
857};
858
859static 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
865struct 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
898static 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
904static 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
910static 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
916static 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
922struct 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
929static 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
936static 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
943static 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 */
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
111enum target_submit_type {
112 /* Use the fabric driver's default submission type */
113 TARGET_FABRIC_DEFAULT_SUBMIT,
114 /* Submit from the calling context */
115 TARGET_DIRECT_SUBMIT,
116 /* Defer submission to the LIO workqueue */
117 TARGET_QUEUE_SUBMIT,
118};
119
120/* struct se_hba->hba_flags */
121enum hba_flags_table {
122 HBA_FLAGS_INTERNAL_USE = 0x01,
123 HBA_FLAGS_PSCSI_MODE = 0x02,
124};
125
126/* Special transport agnostic struct se_cmd->t_states */
127enum transport_state_table {
128 TRANSPORT_NO_STATE = 0,
129 TRANSPORT_NEW_CMD = 1,
130 TRANSPORT_WRITE_PENDING = 3,
131 TRANSPORT_PROCESSING = 5,
132 TRANSPORT_COMPLETE = 6,
133 TRANSPORT_ISTATE_PROCESSING = 11,
134 TRANSPORT_COMPLETE_QF_WP = 18,
135 TRANSPORT_COMPLETE_QF_OK = 19,
136 TRANSPORT_COMPLETE_QF_ERR = 20,
137};
138
139/* Used for struct se_cmd->se_cmd_flags */
140enum se_cmd_flags_table {
141 SCF_SUPPORTED_SAM_OPCODE = (1 << 0),
142 SCF_TRANSPORT_TASK_SENSE = (1 << 1),
143 SCF_EMULATED_TASK_SENSE = (1 << 2),
144 SCF_SCSI_DATA_CDB = (1 << 3),
145 SCF_SCSI_TMR_CDB = (1 << 4),
146 SCF_FUA = (1 << 5),
147 SCF_SE_LUN_CMD = (1 << 6),
148 SCF_BIDI = (1 << 7),
149 SCF_SENT_CHECK_CONDITION = (1 << 8),
150 SCF_OVERFLOW_BIT = (1 << 9),
151 SCF_UNDERFLOW_BIT = (1 << 10),
152 SCF_ALUA_NON_OPTIMIZED = (1 << 11),
153 SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC = (1 << 12),
154 SCF_COMPARE_AND_WRITE = (1 << 13),
155 SCF_PASSTHROUGH_PROT_SG_TO_MEM_NOALLOC = (1 << 14),
156 SCF_ACK_KREF = (1 << 15),
157 SCF_USE_CPUID = (1 << 16),
158 SCF_TASK_ATTR_SET = (1 << 17),
159 SCF_TREAT_READ_AS_NORMAL = (1 << 18),
160};
161
162/*
163 * Used by transport_send_check_condition_and_sense()
164 * to signal which ASC/ASCQ sense payload should be built.
165 */
166typedef unsigned __bitwise sense_reason_t;
167
168enum tcm_sense_reason_table {
169#define R(x) (__force sense_reason_t )(x)
170 TCM_NO_SENSE = R(0x00),
171 TCM_NON_EXISTENT_LUN = R(0x01),
172 TCM_UNSUPPORTED_SCSI_OPCODE = R(0x02),
173 TCM_INCORRECT_AMOUNT_OF_DATA = R(0x03),
174 TCM_UNEXPECTED_UNSOLICITED_DATA = R(0x04),
175 TCM_SERVICE_CRC_ERROR = R(0x05),
176 TCM_SNACK_REJECTED = R(0x06),
177 TCM_SECTOR_COUNT_TOO_MANY = R(0x07),
178 TCM_INVALID_CDB_FIELD = R(0x08),
179 TCM_INVALID_PARAMETER_LIST = R(0x09),
180 TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE = R(0x0a),
181 TCM_UNKNOWN_MODE_PAGE = R(0x0b),
182 TCM_WRITE_PROTECTED = R(0x0c),
183 TCM_CHECK_CONDITION_ABORT_CMD = R(0x0d),
184 TCM_CHECK_CONDITION_UNIT_ATTENTION = R(0x0e),
185
186 TCM_RESERVATION_CONFLICT = R(0x10),
187 TCM_ADDRESS_OUT_OF_RANGE = R(0x11),
188 TCM_OUT_OF_RESOURCES = R(0x12),
189 TCM_PARAMETER_LIST_LENGTH_ERROR = R(0x13),
190 TCM_MISCOMPARE_VERIFY = R(0x14),
191 TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED = R(0x15),
192 TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED = R(0x16),
193 TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED = R(0x17),
194 TCM_COPY_TARGET_DEVICE_NOT_REACHABLE = R(0x18),
195 TCM_TOO_MANY_TARGET_DESCS = R(0x19),
196 TCM_UNSUPPORTED_TARGET_DESC_TYPE_CODE = R(0x1a),
197 TCM_TOO_MANY_SEGMENT_DESCS = R(0x1b),
198 TCM_UNSUPPORTED_SEGMENT_DESC_TYPE_CODE = R(0x1c),
199 TCM_INSUFFICIENT_REGISTRATION_RESOURCES = R(0x1d),
200 TCM_LUN_BUSY = R(0x1e),
201 TCM_INVALID_FIELD_IN_COMMAND_IU = R(0x1f),
202 TCM_ALUA_TG_PT_STANDBY = R(0x20),
203 TCM_ALUA_TG_PT_UNAVAILABLE = R(0x21),
204 TCM_ALUA_STATE_TRANSITION = R(0x22),
205 TCM_ALUA_OFFLINE = R(0x23),
206#undef R
207};
208
209enum target_sc_flags_table {
210 TARGET_SCF_BIDI_OP = 0x01,
211 TARGET_SCF_ACK_KREF = 0x02,
212 TARGET_SCF_UNKNOWN_SIZE = 0x04,
213 TARGET_SCF_USE_CPUID = 0x08,
214};
215
216/* fabric independent task management function values */
217enum tcm_tmreq_table {
218 TMR_ABORT_TASK = 1,
219 TMR_ABORT_TASK_SET = 2,
220 TMR_CLEAR_ACA = 3,
221 TMR_CLEAR_TASK_SET = 4,
222 TMR_LUN_RESET = 5,
223 TMR_TARGET_WARM_RESET = 6,
224 TMR_TARGET_COLD_RESET = 7,
225 TMR_LUN_RESET_PRO = 0x80,
226 TMR_UNKNOWN = 0xff,
227};
228
229/* fabric independent task management response values */
230enum tcm_tmrsp_table {
231 TMR_FUNCTION_FAILED = 0,
232 TMR_FUNCTION_COMPLETE = 1,
233 TMR_TASK_DOES_NOT_EXIST = 2,
234 TMR_LUN_DOES_NOT_EXIST = 3,
235 TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED = 4,
236 TMR_FUNCTION_REJECTED = 5,
237};
238
239/*
240 * Used for target SCSI statistics
241 */
242typedef enum {
243 SCSI_INST_INDEX,
244 SCSI_AUTH_INTR_INDEX,
245 SCSI_INDEX_TYPE_MAX
246} scsi_index_t;
247
248struct se_cmd;
249
250struct t10_alua_lba_map_member {
251 struct list_head lba_map_mem_list;
252 int lba_map_mem_alua_state;
253 int lba_map_mem_alua_pg_id;
254};
255
256struct t10_alua_lba_map {
257 u64 lba_map_first_lba;
258 u64 lba_map_last_lba;
259 struct list_head lba_map_list;
260 struct list_head lba_map_mem_list;
261};
262
263struct t10_alua {
264 /* ALUA Target Port Group ID */
265 u16 alua_tg_pt_gps_counter;
266 u32 alua_tg_pt_gps_count;
267 /* Referrals support */
268 spinlock_t lba_map_lock;
269 u32 lba_map_segment_size;
270 u32 lba_map_segment_multiplier;
271 struct list_head lba_map_list;
272 spinlock_t tg_pt_gps_lock;
273 struct se_device *t10_dev;
274 /* Used for default ALUA Target Port Group */
275 struct t10_alua_tg_pt_gp *default_tg_pt_gp;
276 /* Used for default ALUA Target Port Group ConfigFS group */
277 struct config_group alua_tg_pt_gps_group;
278 struct list_head tg_pt_gps_list;
279};
280
281struct t10_alua_lu_gp {
282 u16 lu_gp_id;
283 int lu_gp_valid_id;
284 u32 lu_gp_members;
285 atomic_t lu_gp_ref_cnt;
286 spinlock_t lu_gp_lock;
287 struct config_group lu_gp_group;
288 struct list_head lu_gp_node;
289 struct list_head lu_gp_mem_list;
290};
291
292struct t10_alua_lu_gp_member {
293 bool lu_gp_assoc;
294 atomic_t lu_gp_mem_ref_cnt;
295 spinlock_t lu_gp_mem_lock;
296 struct t10_alua_lu_gp *lu_gp;
297 struct se_device *lu_gp_mem_dev;
298 struct list_head lu_gp_mem_list;
299};
300
301struct t10_alua_tg_pt_gp {
302 u16 tg_pt_gp_id;
303 int tg_pt_gp_valid_id;
304 int tg_pt_gp_alua_supported_states;
305 int tg_pt_gp_alua_access_status;
306 int tg_pt_gp_alua_access_type;
307 int tg_pt_gp_nonop_delay_msecs;
308 int tg_pt_gp_trans_delay_msecs;
309 int tg_pt_gp_implicit_trans_secs;
310 int tg_pt_gp_pref;
311 int tg_pt_gp_write_metadata;
312 u32 tg_pt_gp_members;
313 int tg_pt_gp_alua_access_state;
314 atomic_t tg_pt_gp_ref_cnt;
315 spinlock_t tg_pt_gp_lock;
316 struct mutex tg_pt_gp_transition_mutex;
317 struct se_device *tg_pt_gp_dev;
318 struct config_group tg_pt_gp_group;
319 struct list_head tg_pt_gp_list;
320 struct list_head tg_pt_gp_lun_list;
321 struct se_lun *tg_pt_gp_alua_lun;
322 struct se_node_acl *tg_pt_gp_alua_nacl;
323};
324
325struct t10_vpd {
326 unsigned char device_identifier[INQUIRY_VPD_DEVICE_IDENTIFIER_LEN];
327 int protocol_identifier_set;
328 u32 protocol_identifier;
329 u32 device_identifier_code_set;
330 u32 association;
331 u32 device_identifier_type;
332 struct list_head vpd_list;
333};
334
335struct t10_wwn {
336 /*
337 * SCSI left aligned strings may not be null terminated. +1 to ensure a
338 * null terminator is always present.
339 */
340 char vendor[INQUIRY_VENDOR_LEN + 1];
341 char model[INQUIRY_MODEL_LEN + 1];
342 char revision[INQUIRY_REVISION_LEN + 1];
343 char unit_serial[INQUIRY_VPD_SERIAL_LEN];
344 u32 company_id;
345 spinlock_t t10_vpd_lock;
346 struct se_device *t10_dev;
347 struct config_group t10_wwn_group;
348 struct list_head t10_vpd_list;
349};
350
351struct t10_pr_registration {
352 /* Used for fabrics that contain WWN+ISID */
353#define PR_REG_ISID_LEN 16
354 /* PR_REG_ISID_LEN + ',i,0x' */
355#define PR_REG_ISID_ID_LEN (PR_REG_ISID_LEN + 5)
356 char pr_reg_isid[PR_REG_ISID_LEN];
357 /* Used during APTPL metadata reading */
358#define PR_APTPL_MAX_IPORT_LEN 256
359 unsigned char pr_iport[PR_APTPL_MAX_IPORT_LEN];
360 /* Used during APTPL metadata reading */
361#define PR_APTPL_MAX_TPORT_LEN 256
362 unsigned char pr_tport[PR_APTPL_MAX_TPORT_LEN];
363 u16 pr_aptpl_rpti;
364 u16 pr_reg_tpgt;
365 /* Reservation effects all target ports */
366 int pr_reg_all_tg_pt;
367 /* Activate Persistence across Target Power Loss */
368 int pr_reg_aptpl;
369 int pr_res_holder;
370 int pr_res_type;
371 int pr_res_scope;
372 /* Used for fabric initiator WWPNs using a ISID */
373 bool isid_present_at_reg;
374 u64 pr_res_mapped_lun;
375 u64 pr_aptpl_target_lun;
376 u16 tg_pt_sep_rtpi;
377 u32 pr_res_generation;
378 u64 pr_reg_bin_isid;
379 u64 pr_res_key;
380 atomic_t pr_res_holders;
381 struct se_node_acl *pr_reg_nacl;
382 /* Used by ALL_TG_PT=1 registration with deve->pr_ref taken */
383 struct se_dev_entry *pr_reg_deve;
384 struct list_head pr_reg_list;
385 struct list_head pr_reg_abort_list;
386 struct list_head pr_reg_aptpl_list;
387 struct list_head pr_reg_atp_list;
388 struct list_head pr_reg_atp_mem_list;
389};
390
391struct t10_reservation {
392 /* Reservation effects all target ports */
393 int pr_all_tg_pt;
394 /* Activate Persistence across Target Power Loss enabled
395 * for SCSI device */
396 int pr_aptpl_active;
397#define PR_APTPL_BUF_LEN 262144
398 u32 pr_generation;
399 spinlock_t registration_lock;
400 spinlock_t aptpl_reg_lock;
401 /*
402 * This will always be set by one individual I_T Nexus.
403 * However with all_tg_pt=1, other I_T Nexus from the
404 * same initiator can access PR reg/res info on a different
405 * target port.
406 *
407 * There is also the 'All Registrants' case, where there is
408 * a single *pr_res_holder of the reservation, but all
409 * registrations are considered reservation holders.
410 */
411 struct se_node_acl *pr_res_holder;
412 struct list_head registration_list;
413 struct list_head aptpl_reg_list;
414};
415
416struct se_tmr_req {
417 /* Task Management function to be performed */
418 u8 function;
419 /* Task Management response to send */
420 u8 response;
421 int call_transport;
422 /* Reference to ITT that Task Mgmt should be performed */
423 u64 ref_task_tag;
424 void *fabric_tmr_ptr;
425 struct se_cmd *task_cmd;
426 struct se_device *tmr_dev;
427 struct list_head tmr_list;
428};
429
430enum target_prot_op {
431 TARGET_PROT_NORMAL = 0,
432 TARGET_PROT_DIN_INSERT = (1 << 0),
433 TARGET_PROT_DOUT_INSERT = (1 << 1),
434 TARGET_PROT_DIN_STRIP = (1 << 2),
435 TARGET_PROT_DOUT_STRIP = (1 << 3),
436 TARGET_PROT_DIN_PASS = (1 << 4),
437 TARGET_PROT_DOUT_PASS = (1 << 5),
438};
439
440#define TARGET_PROT_ALL TARGET_PROT_DIN_INSERT | TARGET_PROT_DOUT_INSERT | \
441 TARGET_PROT_DIN_STRIP | TARGET_PROT_DOUT_STRIP | \
442 TARGET_PROT_DIN_PASS | TARGET_PROT_DOUT_PASS
443
444enum target_prot_type {
445 TARGET_DIF_TYPE0_PROT,
446 TARGET_DIF_TYPE1_PROT,
447 TARGET_DIF_TYPE2_PROT,
448 TARGET_DIF_TYPE3_PROT,
449};
450
451/* Emulation for UNIT ATTENTION Interlock Control */
452enum target_ua_intlck_ctrl {
453 TARGET_UA_INTLCK_CTRL_CLEAR = 0,
454 TARGET_UA_INTLCK_CTRL_NO_CLEAR = 1,
455 TARGET_UA_INTLCK_CTRL_ESTABLISH_UA = 2,
456};
457
458enum target_core_dif_check {
459 TARGET_DIF_CHECK_GUARD = 0x1 << 0,
460 TARGET_DIF_CHECK_APPTAG = 0x1 << 1,
461 TARGET_DIF_CHECK_REFTAG = 0x1 << 2,
462};
463
464/* for sam_task_attr */
465#define TCM_SIMPLE_TAG 0x20
466#define TCM_HEAD_TAG 0x21
467#define TCM_ORDERED_TAG 0x22
468#define TCM_ACA_TAG 0x24
469
470struct se_cmd {
471 /* Used for fail with specific sense codes */
472 sense_reason_t sense_reason;
473 /* SAM response code being sent to initiator */
474 u8 scsi_status;
475 u16 scsi_sense_length;
476 unsigned unknown_data_length:1;
477 bool state_active:1;
478 u64 tag; /* SAM command identifier aka task tag */
479 /* Delay for ALUA Active/NonOptimized state access in milliseconds */
480 int alua_nonop_delay;
481 /* See include/linux/dma-mapping.h */
482 enum dma_data_direction data_direction;
483 /* For SAM Task Attribute */
484 int sam_task_attr;
485 /* Used for se_sess->sess_tag_pool */
486 unsigned int map_tag;
487 int map_cpu;
488 /* Transport protocol dependent state, see transport_state_table */
489 enum transport_state_table t_state;
490 /* See se_cmd_flags_table */
491 u32 se_cmd_flags;
492 /* Total size in bytes associated with command */
493 u32 data_length;
494 u32 residual_count;
495 u64 orig_fe_lun;
496 /* Persistent Reservation key */
497 u64 pr_res_key;
498 /* Used for sense data */
499 void *sense_buffer;
500 struct list_head se_delayed_node;
501 struct list_head se_qf_node;
502 struct se_device *se_dev;
503 struct se_lun *se_lun;
504 /* Only used for internal passthrough and legacy TCM fabric modules */
505 struct se_session *se_sess;
506 struct target_cmd_counter *cmd_cnt;
507 struct se_tmr_req *se_tmr_req;
508 struct llist_node se_cmd_list;
509 struct completion *free_compl;
510 struct completion *abrt_compl;
511 const struct target_core_fabric_ops *se_tfo;
512 sense_reason_t (*execute_cmd)(struct se_cmd *);
513 sense_reason_t (*transport_complete_callback)(struct se_cmd *, bool, int *);
514 void *protocol_data;
515
516 unsigned char *t_task_cdb;
517 unsigned char __t_task_cdb[TCM_MAX_COMMAND_SIZE];
518 unsigned long long t_task_lba;
519 unsigned int t_task_nolb;
520 unsigned int transport_state;
521#define CMD_T_ABORTED (1 << 0)
522#define CMD_T_ACTIVE (1 << 1)
523#define CMD_T_COMPLETE (1 << 2)
524#define CMD_T_SENT (1 << 4)
525#define CMD_T_STOP (1 << 5)
526#define CMD_T_TAS (1 << 10)
527#define CMD_T_FABRIC_STOP (1 << 11)
528 spinlock_t t_state_lock;
529 struct kref cmd_kref;
530 struct completion t_transport_stop_comp;
531
532 struct work_struct work;
533
534 struct scatterlist *t_data_sg;
535 struct scatterlist *t_data_sg_orig;
536 unsigned int t_data_nents;
537 unsigned int t_data_nents_orig;
538 void *t_data_vmap;
539 struct scatterlist *t_bidi_data_sg;
540 unsigned int t_bidi_data_nents;
541
542 /* Used for lun->lun_ref counting */
543 int lun_ref_active;
544
545 struct list_head state_list;
546
547 /* backend private data */
548 void *priv;
549
550 /* DIF related members */
551 enum target_prot_op prot_op;
552 enum target_prot_type prot_type;
553 u8 prot_checks;
554 bool prot_pto;
555 u32 prot_length;
556 u32 reftag_seed;
557 struct scatterlist *t_prot_sg;
558 unsigned int t_prot_nents;
559 sense_reason_t pi_err;
560 u64 sense_info;
561 /*
562 * CPU LIO will execute the cmd on. Defaults to the CPU the cmd is
563 * initialized on. Drivers can override.
564 */
565 int cpuid;
566};
567
568struct se_ua {
569 u8 ua_asc;
570 u8 ua_ascq;
571 struct list_head ua_nacl_list;
572};
573
574struct se_node_acl {
575 char initiatorname[TRANSPORT_IQN_LEN];
576 /* Used to signal demo mode created ACL, disabled by default */
577 bool dynamic_node_acl;
578 bool dynamic_stop;
579 u32 queue_depth;
580 u32 acl_index;
581 enum target_prot_type saved_prot_type;
582#define MAX_ACL_TAG_SIZE 64
583 char acl_tag[MAX_ACL_TAG_SIZE];
584 /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
585 atomic_t acl_pr_ref_count;
586 struct hlist_head lun_entry_hlist;
587 struct se_session *nacl_sess;
588 struct se_portal_group *se_tpg;
589 struct mutex lun_entry_mutex;
590 spinlock_t nacl_sess_lock;
591 struct config_group acl_group;
592 struct config_group acl_attrib_group;
593 struct config_group acl_auth_group;
594 struct config_group acl_param_group;
595 struct config_group acl_fabric_stat_group;
596 struct list_head acl_list;
597 struct list_head acl_sess_list;
598 struct completion acl_free_comp;
599 struct kref acl_kref;
600};
601
602static inline struct se_node_acl *acl_to_nacl(struct config_item *item)
603{
604 return container_of(to_config_group(item), struct se_node_acl,
605 acl_group);
606}
607
608static inline struct se_node_acl *attrib_to_nacl(struct config_item *item)
609{
610 return container_of(to_config_group(item), struct se_node_acl,
611 acl_attrib_group);
612}
613
614static inline struct se_node_acl *auth_to_nacl(struct config_item *item)
615{
616 return container_of(to_config_group(item), struct se_node_acl,
617 acl_auth_group);
618}
619
620static inline struct se_node_acl *param_to_nacl(struct config_item *item)
621{
622 return container_of(to_config_group(item), struct se_node_acl,
623 acl_param_group);
624}
625
626static inline struct se_node_acl *fabric_stat_to_nacl(struct config_item *item)
627{
628 return container_of(to_config_group(item), struct se_node_acl,
629 acl_fabric_stat_group);
630}
631
632struct target_cmd_counter {
633 struct percpu_ref refcnt;
634 wait_queue_head_t refcnt_wq;
635 struct completion stop_done;
636 atomic_t stopped;
637};
638
639struct se_session {
640 u64 sess_bin_isid;
641 enum target_prot_op sup_prot_ops;
642 enum target_prot_type sess_prot_type;
643 struct se_node_acl *se_node_acl;
644 struct se_portal_group *se_tpg;
645 void *fabric_sess_ptr;
646 struct list_head sess_list;
647 struct list_head sess_acl_list;
648 spinlock_t sess_cmd_lock;
649 void *sess_cmd_map;
650 struct sbitmap_queue sess_tag_pool;
651 struct target_cmd_counter *cmd_cnt;
652};
653
654struct se_device;
655struct se_transform_info;
656struct scatterlist;
657
658struct se_ml_stat_grps {
659 struct config_group stat_group;
660 struct config_group scsi_auth_intr_group;
661 struct config_group scsi_att_intr_port_group;
662};
663
664struct se_lun_acl {
665 u64 mapped_lun;
666 struct se_node_acl *se_lun_nacl;
667 struct se_lun *se_lun;
668 struct config_group se_lun_group;
669 struct se_ml_stat_grps ml_stat_grps;
670};
671
672struct se_dev_entry {
673 u64 mapped_lun;
674 u64 pr_res_key;
675 u64 creation_time;
676 bool lun_access_ro;
677 u32 attach_count;
678 atomic_long_t total_cmds;
679 atomic_long_t read_bytes;
680 atomic_long_t write_bytes;
681 /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
682 struct kref pr_kref;
683 struct completion pr_comp;
684 struct se_lun_acl *se_lun_acl;
685 spinlock_t ua_lock;
686 struct se_lun *se_lun;
687#define DEF_PR_REG_ACTIVE 1
688 unsigned long deve_flags;
689 struct list_head alua_port_list;
690 struct list_head lun_link;
691 struct list_head ua_list;
692 struct hlist_node link;
693 struct rcu_head rcu_head;
694};
695
696struct se_dev_attrib {
697 bool emulate_model_alias;
698 bool emulate_dpo; /* deprecated */
699 bool emulate_fua_write;
700 bool emulate_fua_read; /* deprecated */
701 bool emulate_write_cache;
702 enum target_ua_intlck_ctrl emulate_ua_intlck_ctrl;
703 bool emulate_tas;
704 bool emulate_tpu;
705 bool emulate_tpws;
706 bool emulate_caw;
707 bool emulate_3pc;
708 bool emulate_pr;
709 bool emulate_rsoc;
710 enum target_prot_type pi_prot_type;
711 enum target_prot_type hw_pi_prot_type;
712 bool pi_prot_verify;
713 bool enforce_pr_isids;
714 bool force_pr_aptpl;
715 bool is_nonrot;
716 bool emulate_rest_reord;
717 bool unmap_zeroes_data;
718 u32 hw_block_size;
719 u32 block_size;
720 u32 hw_max_sectors;
721 u32 optimal_sectors;
722 u32 hw_queue_depth;
723 u32 queue_depth;
724 u32 max_unmap_lba_count;
725 u32 max_unmap_block_desc_count;
726 u32 unmap_granularity;
727 u32 unmap_granularity_alignment;
728 u32 max_write_same_len;
729 u8 submit_type;
730 struct se_device *da_dev;
731 struct config_group da_group;
732};
733
734struct se_port_stat_grps {
735 struct config_group stat_group;
736 struct config_group scsi_port_group;
737 struct config_group scsi_tgt_port_group;
738 struct config_group scsi_transport_group;
739};
740
741struct scsi_port_stats {
742 atomic_long_t cmd_pdus;
743 atomic_long_t tx_data_octets;
744 atomic_long_t rx_data_octets;
745};
746
747struct se_lun {
748 u64 unpacked_lun;
749 bool lun_shutdown;
750 bool lun_access_ro;
751 u32 lun_index;
752
753 atomic_t lun_acl_count;
754 struct se_device __rcu *lun_se_dev;
755
756 struct list_head lun_deve_list;
757 spinlock_t lun_deve_lock;
758
759 /* ALUA state */
760 int lun_tg_pt_secondary_stat;
761 int lun_tg_pt_secondary_write_md;
762 atomic_t lun_tg_pt_secondary_offline;
763 struct mutex lun_tg_pt_md_mutex;
764
765 /* ALUA target port group linkage */
766 struct list_head lun_tg_pt_gp_link;
767 struct t10_alua_tg_pt_gp __rcu *lun_tg_pt_gp;
768 spinlock_t lun_tg_pt_gp_lock;
769
770 struct se_portal_group *lun_tpg;
771 struct scsi_port_stats lun_stats;
772 struct config_group lun_group;
773 struct se_port_stat_grps port_stat_grps;
774 struct completion lun_shutdown_comp;
775 struct percpu_ref lun_ref;
776 struct list_head lun_dev_link;
777 struct hlist_node link;
778 struct rcu_head rcu_head;
779};
780
781struct se_dev_stat_grps {
782 struct config_group stat_group;
783 struct config_group scsi_dev_group;
784 struct config_group scsi_tgt_dev_group;
785 struct config_group scsi_lu_group;
786};
787
788struct se_cmd_queue {
789 struct llist_head cmd_list;
790 struct work_struct work;
791};
792
793struct se_dev_plug {
794 struct se_device *se_dev;
795};
796
797struct se_device_queue {
798 struct list_head state_list;
799 spinlock_t lock;
800 struct se_cmd_queue sq;
801};
802
803struct se_device {
804 /* Used for SAM Task Attribute ordering */
805 u32 dev_cur_ordered_id;
806 u32 dev_flags;
807#define DF_CONFIGURED 0x00000001
808#define DF_FIRMWARE_VPD_UNIT_SERIAL 0x00000002
809#define DF_EMULATED_VPD_UNIT_SERIAL 0x00000004
810#define DF_USING_UDEV_PATH 0x00000008
811#define DF_USING_ALIAS 0x00000010
812#define DF_READ_ONLY 0x00000020
813 u8 transport_flags;
814 /* Physical device queue depth */
815 u32 queue_depth;
816 /* Used for SPC-2 reservations enforce of ISIDs */
817 u64 dev_res_bin_isid;
818 /* Pointer to transport specific device structure */
819 u32 dev_index;
820 u64 creation_time;
821 atomic_long_t num_resets;
822 atomic_long_t aborts_complete;
823 atomic_long_t aborts_no_task;
824 atomic_long_t num_cmds;
825 atomic_long_t read_bytes;
826 atomic_long_t write_bytes;
827 /* Active commands on this virtual SE device */
828 atomic_t non_ordered;
829 bool ordered_sync_in_progress;
830 atomic_t delayed_cmd_count;
831 atomic_t dev_qf_count;
832 u32 export_count;
833 spinlock_t delayed_cmd_lock;
834 spinlock_t dev_reservation_lock;
835 unsigned int dev_reservation_flags;
836#define DRF_SPC2_RESERVATIONS 0x00000001
837#define DRF_SPC2_RESERVATIONS_WITH_ISID 0x00000002
838 spinlock_t se_port_lock;
839 spinlock_t se_tmr_lock;
840 spinlock_t qf_cmd_lock;
841 struct semaphore caw_sem;
842 /* Used for legacy SPC-2 reservations */
843 struct se_session *reservation_holder;
844 /* Used for ALUA Logical Unit Group membership */
845 struct t10_alua_lu_gp_member *dev_alua_lu_gp_mem;
846 /* Used for SPC-3 Persistent Reservations */
847 struct t10_pr_registration *dev_pr_res_holder;
848 struct list_head dev_sep_list;
849 struct list_head dev_tmr_list;
850 struct work_struct qf_work_queue;
851 struct work_struct delayed_cmd_work;
852 struct list_head delayed_cmd_list;
853 struct list_head qf_cmd_list;
854 /* Pointer to associated SE HBA */
855 struct se_hba *se_hba;
856 /* T10 Inquiry and VPD WWN Information */
857 struct t10_wwn t10_wwn;
858 /* T10 Asymmetric Logical Unit Assignment for Target Ports */
859 struct t10_alua t10_alua;
860 /* T10 SPC-2 + SPC-3 Reservations */
861 struct t10_reservation t10_pr;
862 struct se_dev_attrib dev_attrib;
863 struct config_group dev_action_group;
864 struct config_group dev_group;
865 struct config_group dev_pr_group;
866 struct se_dev_stat_grps dev_stat_grps;
867#define SE_DEV_ALIAS_LEN 512 /* must be less than PAGE_SIZE */
868 unsigned char dev_alias[SE_DEV_ALIAS_LEN];
869#define SE_UDEV_PATH_LEN 512 /* must be less than PAGE_SIZE */
870 unsigned char udev_path[SE_UDEV_PATH_LEN];
871 /* Pointer to template of function pointers for transport */
872 const struct target_backend_ops *transport;
873 struct se_lun xcopy_lun;
874 /* Protection Information */
875 int prot_length;
876 /* For se_lun->lun_se_dev RCU read-side critical access */
877 u32 hba_index;
878 struct rcu_head rcu_head;
879 int queue_cnt;
880 struct se_device_queue *queues;
881 struct mutex lun_reset_mutex;
882};
883
884struct target_opcode_descriptor {
885 u8 support:3;
886 u8 serv_action_valid:1;
887 u8 opcode;
888 u16 service_action;
889 u32 cdb_size;
890 u8 specific_timeout;
891 u16 nominal_timeout;
892 u16 recommended_timeout;
893 bool (*enabled)(struct target_opcode_descriptor *descr,
894 struct se_cmd *cmd);
895 void (*update_usage_bits)(u8 *usage_bits,
896 struct se_device *dev);
897 u8 usage_bits[];
898};
899
900struct se_hba {
901 u16 hba_tpgt;
902 u32 hba_id;
903 /* See hba_flags_table */
904 u32 hba_flags;
905 /* Virtual iSCSI devices attached. */
906 u32 dev_count;
907 u32 hba_index;
908 /* Pointer to transport specific host structure. */
909 void *hba_ptr;
910 struct list_head hba_node;
911 spinlock_t device_lock;
912 struct config_group hba_group;
913 struct mutex hba_access_mutex;
914 struct target_backend *backend;
915};
916
917struct se_tpg_np {
918 struct se_portal_group *tpg_np_parent;
919 struct config_group tpg_np_group;
920};
921
922static inline struct se_tpg_np *to_tpg_np(struct config_item *item)
923{
924 return container_of(to_config_group(item), struct se_tpg_np,
925 tpg_np_group);
926}
927
928struct se_portal_group {
929 /*
930 * PROTOCOL IDENTIFIER value per SPC4, 7.5.1.
931 *
932 * Negative values can be used by fabric drivers for internal use TPGs.
933 */
934 int proto_id;
935 bool enabled;
936 /* RELATIVE TARGET PORT IDENTIFIER */
937 u16 tpg_rtpi;
938 bool rtpi_manual;
939 /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
940 atomic_t tpg_pr_ref_count;
941 /* Spinlock for adding/removing ACLed Nodes */
942 struct mutex acl_node_mutex;
943 /* Spinlock for adding/removing sessions */
944 spinlock_t session_lock;
945 struct mutex tpg_lun_mutex;
946 /* linked list for initiator ACL list */
947 struct list_head acl_node_list;
948 struct hlist_head tpg_lun_hlist;
949 struct se_lun *tpg_virt_lun0;
950 /* List of TCM sessions associated wth this TPG */
951 struct list_head tpg_sess_list;
952 /* Pointer to $FABRIC_MOD dependent code */
953 const struct target_core_fabric_ops *se_tpg_tfo;
954 struct se_wwn *se_tpg_wwn;
955 struct config_group tpg_group;
956 struct config_group tpg_lun_group;
957 struct config_group tpg_np_group;
958 struct config_group tpg_acl_group;
959 struct config_group tpg_attrib_group;
960 struct config_group tpg_auth_group;
961 struct config_group tpg_param_group;
962};
963
964static inline struct se_portal_group *to_tpg(struct config_item *item)
965{
966 return container_of(to_config_group(item), struct se_portal_group,
967 tpg_group);
968}
969
970static inline struct se_portal_group *attrib_to_tpg(struct config_item *item)
971{
972 return container_of(to_config_group(item), struct se_portal_group,
973 tpg_attrib_group);
974}
975
976static inline struct se_portal_group *auth_to_tpg(struct config_item *item)
977{
978 return container_of(to_config_group(item), struct se_portal_group,
979 tpg_auth_group);
980}
981
982static inline struct se_portal_group *param_to_tpg(struct config_item *item)
983{
984 return container_of(to_config_group(item), struct se_portal_group,
985 tpg_param_group);
986}
987
988enum {
989 /* Use se_cmd's cpuid for completion */
990 SE_COMPL_AFFINITY_CPUID = -1,
991 /* Complete on current CPU */
992 SE_COMPL_AFFINITY_CURR_CPU = -2,
993};
994
995struct se_wwn {
996 struct target_fabric_configfs *wwn_tf;
997 void *priv;
998 struct config_group wwn_group;
999 struct config_group fabric_stat_group;
1000 struct config_group param_group;
1001 int cmd_compl_affinity;
1002};
1003
1004static inline void atomic_inc_mb(atomic_t *v)
1005{
1006 smp_mb__before_atomic();
1007 atomic_inc(v);
1008 smp_mb__after_atomic();
1009}
1010
1011static inline void atomic_dec_mb(atomic_t *v)
1012{
1013 smp_mb__before_atomic();
1014 atomic_dec(v);
1015 smp_mb__after_atomic();
1016}
1017
1018static inline void target_free_tag(struct se_session *sess, struct se_cmd *cmd)
1019{
1020 sbitmap_queue_clear(&sess->sess_tag_pool, cmd->map_tag, cmd->map_cpu);
1021}
1022
1023#endif /* TARGET_CORE_BASE_H */