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Linux 4.19-rc7
[linux-2.6/btrfs-unstable.git] / include / target / target_core_base.h
blob7a4ee7852ca486396b819c2cfb3334ce4756a997
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 /* Attempts before moving from SHORT to LONG */
50 #define PYX_TRANSPORT_WINDOW_CLOSED_THRESHOLD 3
51 #define PYX_TRANSPORT_WINDOW_CLOSED_WAIT_SHORT 3 /* In milliseconds */
52 #define PYX_TRANSPORT_WINDOW_CLOSED_WAIT_LONG 10 /* In milliseconds */
53
54 #define PYX_TRANSPORT_STATUS_INTERVAL 5 /* In seconds */
55
56 /* struct se_dev_attrib sanity values */
57 /* Default max_unmap_lba_count */
58 #define DA_MAX_UNMAP_LBA_COUNT 0
59 /* Default max_unmap_block_desc_count */
60 #define DA_MAX_UNMAP_BLOCK_DESC_COUNT 0
61 /* Default unmap_granularity */
62 #define DA_UNMAP_GRANULARITY_DEFAULT 0
63 /* Default unmap_granularity_alignment */
64 #define DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT 0
65 /* Default unmap_zeroes_data */
66 #define DA_UNMAP_ZEROES_DATA_DEFAULT 0
67 /* Default max_write_same_len, disabled by default */
68 #define DA_MAX_WRITE_SAME_LEN 0
69 /* Use a model alias based on the configfs backend device name */
70 #define DA_EMULATE_MODEL_ALIAS 0
71 /* Emulation for WriteCache and SYNCHRONIZE_CACHE */
72 #define DA_EMULATE_WRITE_CACHE 0
73 /* Emulation for UNIT ATTENTION Interlock Control */
74 #define DA_EMULATE_UA_INTLLCK_CTRL 0
75 /* Emulation for TASK_ABORTED status (TAS) by default */
76 #define DA_EMULATE_TAS 1
77 /* Emulation for Thin Provisioning UNMAP using block/blk-lib.c:blkdev_issue_discard() */
78 #define DA_EMULATE_TPU 0
79 /*
80 * Emulation for Thin Provisioning WRITE_SAME w/ UNMAP=1 bit using
81 * block/blk-lib.c:blkdev_issue_discard()
82 */
83 #define DA_EMULATE_TPWS 0
84 /* Emulation for CompareAndWrite (AtomicTestandSet) by default */
85 #define DA_EMULATE_CAW 1
86 /* Emulation for 3rd Party Copy (ExtendedCopy) by default */
87 #define DA_EMULATE_3PC 1
88 /* No Emulation for PSCSI by default */
89 #define DA_EMULATE_ALUA 0
90 /* Enforce SCSI Initiator Port TransportID with 'ISID' for PR */
91 #define DA_ENFORCE_PR_ISIDS 1
92 /* Force SPC-3 PR Activate Persistence across Target Power Loss */
93 #define DA_FORCE_PR_APTPL 0
94 #define DA_STATUS_MAX_SECTORS_MIN 16
95 #define DA_STATUS_MAX_SECTORS_MAX 8192
96 /* By default don't report non-rotating (solid state) medium */
97 #define DA_IS_NONROT 0
98 /* Queue Algorithm Modifier default for restricted reordering in control mode page */
99 #define DA_EMULATE_REST_REORD 0
100
101 #define SE_INQUIRY_BUF 1024
102 #define SE_MODE_PAGE_BUF 512
103 #define SE_SENSE_BUF 96
104
105 /* struct se_hba->hba_flags */
106 enum hba_flags_table {
107 HBA_FLAGS_INTERNAL_USE = 0x01,
108 HBA_FLAGS_PSCSI_MODE = 0x02,
109 };
110
111 /* Special transport agnostic struct se_cmd->t_states */
112 enum transport_state_table {
113 TRANSPORT_NO_STATE = 0,
114 TRANSPORT_NEW_CMD = 1,
115 TRANSPORT_WRITE_PENDING = 3,
116 TRANSPORT_PROCESSING = 5,
117 TRANSPORT_COMPLETE = 6,
118 TRANSPORT_ISTATE_PROCESSING = 11,
119 TRANSPORT_COMPLETE_QF_WP = 18,
120 TRANSPORT_COMPLETE_QF_OK = 19,
121 TRANSPORT_COMPLETE_QF_ERR = 20,
122 };
123
124 /* Used for struct se_cmd->se_cmd_flags */
125 enum se_cmd_flags_table {
126 SCF_SUPPORTED_SAM_OPCODE = 0x00000001,
127 SCF_TRANSPORT_TASK_SENSE = 0x00000002,
128 SCF_EMULATED_TASK_SENSE = 0x00000004,
129 SCF_SCSI_DATA_CDB = 0x00000008,
130 SCF_SCSI_TMR_CDB = 0x00000010,
131 SCF_FUA = 0x00000080,
132 SCF_SE_LUN_CMD = 0x00000100,
133 SCF_BIDI = 0x00000400,
134 SCF_SENT_CHECK_CONDITION = 0x00000800,
135 SCF_OVERFLOW_BIT = 0x00001000,
136 SCF_UNDERFLOW_BIT = 0x00002000,
137 SCF_SEND_DELAYED_TAS = 0x00004000,
138 SCF_ALUA_NON_OPTIMIZED = 0x00008000,
139 SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC = 0x00020000,
140 SCF_COMPARE_AND_WRITE = 0x00080000,
141 SCF_COMPARE_AND_WRITE_POST = 0x00100000,
142 SCF_PASSTHROUGH_PROT_SG_TO_MEM_NOALLOC = 0x00200000,
143 SCF_ACK_KREF = 0x00400000,
144 SCF_USE_CPUID = 0x00800000,
145 SCF_TASK_ATTR_SET = 0x01000000,
146 SCF_TREAT_READ_AS_NORMAL = 0x02000000,
147 };
148
149 /*
150 * Used by transport_send_check_condition_and_sense()
151 * to signal which ASC/ASCQ sense payload should be built.
152 */
153 typedef unsigned __bitwise sense_reason_t;
154
155 enum tcm_sense_reason_table {
156 #define R(x) (__force sense_reason_t )(x)
157 TCM_NO_SENSE = R(0x00),
158 TCM_NON_EXISTENT_LUN = R(0x01),
159 TCM_UNSUPPORTED_SCSI_OPCODE = R(0x02),
160 TCM_INCORRECT_AMOUNT_OF_DATA = R(0x03),
161 TCM_UNEXPECTED_UNSOLICITED_DATA = R(0x04),
162 TCM_SERVICE_CRC_ERROR = R(0x05),
163 TCM_SNACK_REJECTED = R(0x06),
164 TCM_SECTOR_COUNT_TOO_MANY = R(0x07),
165 TCM_INVALID_CDB_FIELD = R(0x08),
166 TCM_INVALID_PARAMETER_LIST = R(0x09),
167 TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE = R(0x0a),
168 TCM_UNKNOWN_MODE_PAGE = R(0x0b),
169 TCM_WRITE_PROTECTED = R(0x0c),
170 TCM_CHECK_CONDITION_ABORT_CMD = R(0x0d),
171 TCM_CHECK_CONDITION_UNIT_ATTENTION = R(0x0e),
172 TCM_CHECK_CONDITION_NOT_READY = R(0x0f),
173 TCM_RESERVATION_CONFLICT = R(0x10),
174 TCM_ADDRESS_OUT_OF_RANGE = R(0x11),
175 TCM_OUT_OF_RESOURCES = R(0x12),
176 TCM_PARAMETER_LIST_LENGTH_ERROR = R(0x13),
177 TCM_MISCOMPARE_VERIFY = R(0x14),
178 TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED = R(0x15),
179 TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED = R(0x16),
180 TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED = R(0x17),
181 TCM_COPY_TARGET_DEVICE_NOT_REACHABLE = R(0x18),
182 TCM_TOO_MANY_TARGET_DESCS = R(0x19),
183 TCM_UNSUPPORTED_TARGET_DESC_TYPE_CODE = R(0x1a),
184 TCM_TOO_MANY_SEGMENT_DESCS = R(0x1b),
185 TCM_UNSUPPORTED_SEGMENT_DESC_TYPE_CODE = R(0x1c),
186 TCM_INSUFFICIENT_REGISTRATION_RESOURCES = R(0x1d),
187 TCM_LUN_BUSY = R(0x1e),
188 #undef R
189 };
190
191 enum target_sc_flags_table {
192 TARGET_SCF_BIDI_OP = 0x01,
193 TARGET_SCF_ACK_KREF = 0x02,
194 TARGET_SCF_UNKNOWN_SIZE = 0x04,
195 TARGET_SCF_USE_CPUID = 0x08,
196 TARGET_SCF_LOOKUP_LUN_FROM_TAG = 0x10,
197 };
198
199 /* fabric independent task management function values */
200 enum tcm_tmreq_table {
201 TMR_ABORT_TASK = 1,
202 TMR_ABORT_TASK_SET = 2,
203 TMR_CLEAR_ACA = 3,
204 TMR_CLEAR_TASK_SET = 4,
205 TMR_LUN_RESET = 5,
206 TMR_TARGET_WARM_RESET = 6,
207 TMR_TARGET_COLD_RESET = 7,
208 TMR_UNKNOWN = 0xff,
209 };
210
211 /* fabric independent task management response values */
212 enum tcm_tmrsp_table {
213 TMR_FUNCTION_FAILED = 0,
214 TMR_FUNCTION_COMPLETE = 1,
215 TMR_TASK_DOES_NOT_EXIST = 2,
216 TMR_LUN_DOES_NOT_EXIST = 3,
217 TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED = 4,
218 TMR_FUNCTION_REJECTED = 5,
219 };
220
221 /*
222 * Used for target SCSI statistics
223 */
224 typedef enum {
225 SCSI_INST_INDEX,
226 SCSI_AUTH_INTR_INDEX,
227 SCSI_INDEX_TYPE_MAX
228 } scsi_index_t;
229
230 struct se_cmd;
231
232 struct t10_alua_lba_map_member {
233 struct list_head lba_map_mem_list;
234 int lba_map_mem_alua_state;
235 int lba_map_mem_alua_pg_id;
236 };
237
238 struct t10_alua_lba_map {
239 u64 lba_map_first_lba;
240 u64 lba_map_last_lba;
241 struct list_head lba_map_list;
242 struct list_head lba_map_mem_list;
243 };
244
245 struct t10_alua {
246 /* ALUA Target Port Group ID */
247 u16 alua_tg_pt_gps_counter;
248 u32 alua_tg_pt_gps_count;
249 /* Referrals support */
250 spinlock_t lba_map_lock;
251 u32 lba_map_segment_size;
252 u32 lba_map_segment_multiplier;
253 struct list_head lba_map_list;
254 spinlock_t tg_pt_gps_lock;
255 struct se_device *t10_dev;
256 /* Used for default ALUA Target Port Group */
257 struct t10_alua_tg_pt_gp *default_tg_pt_gp;
258 /* Used for default ALUA Target Port Group ConfigFS group */
259 struct config_group alua_tg_pt_gps_group;
260 struct list_head tg_pt_gps_list;
261 };
262
263 struct t10_alua_lu_gp {
264 u16 lu_gp_id;
265 int lu_gp_valid_id;
266 u32 lu_gp_members;
267 atomic_t lu_gp_ref_cnt;
268 spinlock_t lu_gp_lock;
269 struct config_group lu_gp_group;
270 struct list_head lu_gp_node;
271 struct list_head lu_gp_mem_list;
272 };
273
274 struct t10_alua_lu_gp_member {
275 bool lu_gp_assoc;
276 atomic_t lu_gp_mem_ref_cnt;
277 spinlock_t lu_gp_mem_lock;
278 struct t10_alua_lu_gp *lu_gp;
279 struct se_device *lu_gp_mem_dev;
280 struct list_head lu_gp_mem_list;
281 };
282
283 struct t10_alua_tg_pt_gp {
284 u16 tg_pt_gp_id;
285 int tg_pt_gp_valid_id;
286 int tg_pt_gp_alua_supported_states;
287 int tg_pt_gp_alua_access_status;
288 int tg_pt_gp_alua_access_type;
289 int tg_pt_gp_nonop_delay_msecs;
290 int tg_pt_gp_trans_delay_msecs;
291 int tg_pt_gp_implicit_trans_secs;
292 int tg_pt_gp_pref;
293 int tg_pt_gp_write_metadata;
294 u32 tg_pt_gp_members;
295 int tg_pt_gp_alua_access_state;
296 atomic_t tg_pt_gp_ref_cnt;
297 spinlock_t tg_pt_gp_lock;
298 struct mutex tg_pt_gp_transition_mutex;
299 struct se_device *tg_pt_gp_dev;
300 struct config_group tg_pt_gp_group;
301 struct list_head tg_pt_gp_list;
302 struct list_head tg_pt_gp_lun_list;
303 struct se_lun *tg_pt_gp_alua_lun;
304 struct se_node_acl *tg_pt_gp_alua_nacl;
305 };
306
307 struct t10_vpd {
308 unsigned char device_identifier[INQUIRY_VPD_DEVICE_IDENTIFIER_LEN];
309 int protocol_identifier_set;
310 u32 protocol_identifier;
311 u32 device_identifier_code_set;
312 u32 association;
313 u32 device_identifier_type;
314 struct list_head vpd_list;
315 };
316
317 struct t10_wwn {
318 char vendor[8];
319 char model[16];
320 char revision[4];
321 char unit_serial[INQUIRY_VPD_SERIAL_LEN];
322 spinlock_t t10_vpd_lock;
323 struct se_device *t10_dev;
324 struct config_group t10_wwn_group;
325 struct list_head t10_vpd_list;
326 };
327
328 struct t10_pr_registration {
329 /* Used for fabrics that contain WWN+ISID */
330 #define PR_REG_ISID_LEN 16
331 /* PR_REG_ISID_LEN + ',i,0x' */
332 #define PR_REG_ISID_ID_LEN (PR_REG_ISID_LEN + 5)
333 char pr_reg_isid[PR_REG_ISID_LEN];
334 /* Used during APTPL metadata reading */
335 #define PR_APTPL_MAX_IPORT_LEN 256
336 unsigned char pr_iport[PR_APTPL_MAX_IPORT_LEN];
337 /* Used during APTPL metadata reading */
338 #define PR_APTPL_MAX_TPORT_LEN 256
339 unsigned char pr_tport[PR_APTPL_MAX_TPORT_LEN];
340 u16 pr_aptpl_rpti;
341 u16 pr_reg_tpgt;
342 /* Reservation effects all target ports */
343 int pr_reg_all_tg_pt;
344 /* Activate Persistence across Target Power Loss */
345 int pr_reg_aptpl;
346 int pr_res_holder;
347 int pr_res_type;
348 int pr_res_scope;
349 /* Used for fabric initiator WWPNs using a ISID */
350 bool isid_present_at_reg;
351 u64 pr_res_mapped_lun;
352 u64 pr_aptpl_target_lun;
353 u16 tg_pt_sep_rtpi;
354 u32 pr_res_generation;
355 u64 pr_reg_bin_isid;
356 u64 pr_res_key;
357 atomic_t pr_res_holders;
358 struct se_node_acl *pr_reg_nacl;
359 /* Used by ALL_TG_PT=1 registration with deve->pr_ref taken */
360 struct se_dev_entry *pr_reg_deve;
361 struct list_head pr_reg_list;
362 struct list_head pr_reg_abort_list;
363 struct list_head pr_reg_aptpl_list;
364 struct list_head pr_reg_atp_list;
365 struct list_head pr_reg_atp_mem_list;
366 };
367
368 struct t10_reservation {
369 /* Reservation effects all target ports */
370 int pr_all_tg_pt;
371 /* Activate Persistence across Target Power Loss enabled
372 * for SCSI device */
373 int pr_aptpl_active;
374 #define PR_APTPL_BUF_LEN 262144
375 u32 pr_generation;
376 spinlock_t registration_lock;
377 spinlock_t aptpl_reg_lock;
378 /*
379 * This will always be set by one individual I_T Nexus.
380 * However with all_tg_pt=1, other I_T Nexus from the
381 * same initiator can access PR reg/res info on a different
382 * target port.
383 *
384 * There is also the 'All Registrants' case, where there is
385 * a single *pr_res_holder of the reservation, but all
386 * registrations are considered reservation holders.
387 */
388 struct se_node_acl *pr_res_holder;
389 struct list_head registration_list;
390 struct list_head aptpl_reg_list;
391 };
392
393 struct se_tmr_req {
394 /* Task Management function to be performed */
395 u8 function;
396 /* Task Management response to send */
397 u8 response;
398 int call_transport;
399 /* Reference to ITT that Task Mgmt should be performed */
400 u64 ref_task_tag;
401 void *fabric_tmr_ptr;
402 struct se_cmd *task_cmd;
403 struct se_device *tmr_dev;
404 struct list_head tmr_list;
405 };
406
407 enum target_prot_op {
408 TARGET_PROT_NORMAL = 0,
409 TARGET_PROT_DIN_INSERT = (1 << 0),
410 TARGET_PROT_DOUT_INSERT = (1 << 1),
411 TARGET_PROT_DIN_STRIP = (1 << 2),
412 TARGET_PROT_DOUT_STRIP = (1 << 3),
413 TARGET_PROT_DIN_PASS = (1 << 4),
414 TARGET_PROT_DOUT_PASS = (1 << 5),
415 };
416
417 #define TARGET_PROT_ALL TARGET_PROT_DIN_INSERT | TARGET_PROT_DOUT_INSERT | \
418 TARGET_PROT_DIN_STRIP | TARGET_PROT_DOUT_STRIP | \
419 TARGET_PROT_DIN_PASS | TARGET_PROT_DOUT_PASS
420
421 enum target_prot_type {
422 TARGET_DIF_TYPE0_PROT,
423 TARGET_DIF_TYPE1_PROT,
424 TARGET_DIF_TYPE2_PROT,
425 TARGET_DIF_TYPE3_PROT,
426 };
427
428 enum target_core_dif_check {
429 TARGET_DIF_CHECK_GUARD = 0x1 << 0,
430 TARGET_DIF_CHECK_APPTAG = 0x1 << 1,
431 TARGET_DIF_CHECK_REFTAG = 0x1 << 2,
432 };
433
434 /* for sam_task_attr */
435 #define TCM_SIMPLE_TAG 0x20
436 #define TCM_HEAD_TAG 0x21
437 #define TCM_ORDERED_TAG 0x22
438 #define TCM_ACA_TAG 0x24
439
440 struct se_cmd {
441 /* SAM response code being sent to initiator */
442 u8 scsi_status;
443 u8 scsi_asc;
444 u8 scsi_ascq;
445 u16 scsi_sense_length;
446 unsigned unknown_data_length:1;
447 bool state_active:1;
448 u64 tag; /* SAM command identifier aka task tag */
449 /* Delay for ALUA Active/NonOptimized state access in milliseconds */
450 int alua_nonop_delay;
451 /* See include/linux/dma-mapping.h */
452 enum dma_data_direction data_direction;
453 /* For SAM Task Attribute */
454 int sam_task_attr;
455 /* Used for se_sess->sess_tag_pool */
456 unsigned int map_tag;
457 int map_cpu;
458 /* Transport protocol dependent state, see transport_state_table */
459 enum transport_state_table t_state;
460 /* See se_cmd_flags_table */
461 u32 se_cmd_flags;
462 /* Total size in bytes associated with command */
463 u32 data_length;
464 u32 residual_count;
465 u64 orig_fe_lun;
466 /* Persistent Reservation key */
467 u64 pr_res_key;
468 /* Used for sense data */
469 void *sense_buffer;
470 struct list_head se_delayed_node;
471 struct list_head se_qf_node;
472 struct se_device *se_dev;
473 struct se_lun *se_lun;
474 /* Only used for internal passthrough and legacy TCM fabric modules */
475 struct se_session *se_sess;
476 struct se_tmr_req *se_tmr_req;
477 struct list_head se_cmd_list;
478 struct completion *compl;
479 const struct target_core_fabric_ops *se_tfo;
480 sense_reason_t (*execute_cmd)(struct se_cmd *);
481 sense_reason_t (*transport_complete_callback)(struct se_cmd *, bool, int *);
482 void *protocol_data;
483
484 unsigned char *t_task_cdb;
485 unsigned char __t_task_cdb[TCM_MAX_COMMAND_SIZE];
486 unsigned long long t_task_lba;
487 unsigned int t_task_nolb;
488 unsigned int transport_state;
489 #define CMD_T_ABORTED (1 << 0)
490 #define CMD_T_ACTIVE (1 << 1)
491 #define CMD_T_COMPLETE (1 << 2)
492 #define CMD_T_SENT (1 << 4)
493 #define CMD_T_STOP (1 << 5)
494 #define CMD_T_TAS (1 << 10)
495 #define CMD_T_FABRIC_STOP (1 << 11)
496 #define CMD_T_PRE_EXECUTE (1 << 12)
497 spinlock_t t_state_lock;
498 struct kref cmd_kref;
499 struct completion t_transport_stop_comp;
500
501 struct work_struct work;
502
503 struct scatterlist *t_data_sg;
504 struct scatterlist *t_data_sg_orig;
505 unsigned int t_data_nents;
506 unsigned int t_data_nents_orig;
507 void *t_data_vmap;
508 struct scatterlist *t_bidi_data_sg;
509 unsigned int t_bidi_data_nents;
510
511 /* Used for lun->lun_ref counting */
512 int lun_ref_active;
513
514 struct list_head state_list;
515
516 /* backend private data */
517 void *priv;
518
519 /* DIF related members */
520 enum target_prot_op prot_op;
521 enum target_prot_type prot_type;
522 u8 prot_checks;
523 bool prot_pto;
524 u32 prot_length;
525 u32 reftag_seed;
526 struct scatterlist *t_prot_sg;
527 unsigned int t_prot_nents;
528 sense_reason_t pi_err;
529 sector_t bad_sector;
530 int cpuid;
531 };
532
533 struct se_ua {
534 u8 ua_asc;
535 u8 ua_ascq;
536 struct list_head ua_nacl_list;
537 };
538
539 struct se_node_acl {
540 char initiatorname[TRANSPORT_IQN_LEN];
541 /* Used to signal demo mode created ACL, disabled by default */
542 bool dynamic_node_acl;
543 bool dynamic_stop;
544 u32 queue_depth;
545 u32 acl_index;
546 enum target_prot_type saved_prot_type;
547 #define MAX_ACL_TAG_SIZE 64
548 char acl_tag[MAX_ACL_TAG_SIZE];
549 /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
550 atomic_t acl_pr_ref_count;
551 struct hlist_head lun_entry_hlist;
552 struct se_session *nacl_sess;
553 struct se_portal_group *se_tpg;
554 struct mutex lun_entry_mutex;
555 spinlock_t nacl_sess_lock;
556 struct config_group acl_group;
557 struct config_group acl_attrib_group;
558 struct config_group acl_auth_group;
559 struct config_group acl_param_group;
560 struct config_group acl_fabric_stat_group;
561 struct list_head acl_list;
562 struct list_head acl_sess_list;
563 struct completion acl_free_comp;
564 struct kref acl_kref;
565 };
566
567 static inline struct se_node_acl *acl_to_nacl(struct config_item *item)
568 {
569 return container_of(to_config_group(item), struct se_node_acl,
570 acl_group);
571 }
572
573 static inline struct se_node_acl *attrib_to_nacl(struct config_item *item)
574 {
575 return container_of(to_config_group(item), struct se_node_acl,
576 acl_attrib_group);
577 }
578
579 static inline struct se_node_acl *auth_to_nacl(struct config_item *item)
580 {
581 return container_of(to_config_group(item), struct se_node_acl,
582 acl_auth_group);
583 }
584
585 static inline struct se_node_acl *param_to_nacl(struct config_item *item)
586 {
587 return container_of(to_config_group(item), struct se_node_acl,
588 acl_param_group);
589 }
590
591 static inline struct se_node_acl *fabric_stat_to_nacl(struct config_item *item)
592 {
593 return container_of(to_config_group(item), struct se_node_acl,
594 acl_fabric_stat_group);
595 }
596
597 struct se_session {
598 unsigned sess_tearing_down:1;
599 u64 sess_bin_isid;
600 enum target_prot_op sup_prot_ops;
601 enum target_prot_type sess_prot_type;
602 struct se_node_acl *se_node_acl;
603 struct se_portal_group *se_tpg;
604 void *fabric_sess_ptr;
605 struct list_head sess_list;
606 struct list_head sess_acl_list;
607 struct list_head sess_cmd_list;
608 spinlock_t sess_cmd_lock;
609 wait_queue_head_t cmd_list_wq;
610 void *sess_cmd_map;
611 struct sbitmap_queue sess_tag_pool;
612 };
613
614 struct se_device;
615 struct se_transform_info;
616 struct scatterlist;
617
618 struct se_ml_stat_grps {
619 struct config_group stat_group;
620 struct config_group scsi_auth_intr_group;
621 struct config_group scsi_att_intr_port_group;
622 };
623
624 struct se_lun_acl {
625 u64 mapped_lun;
626 struct se_node_acl *se_lun_nacl;
627 struct se_lun *se_lun;
628 struct config_group se_lun_group;
629 struct se_ml_stat_grps ml_stat_grps;
630 };
631
632 struct se_dev_entry {
633 u64 mapped_lun;
634 u64 pr_res_key;
635 u64 creation_time;
636 bool lun_access_ro;
637 u32 attach_count;
638 atomic_long_t total_cmds;
639 atomic_long_t read_bytes;
640 atomic_long_t write_bytes;
641 /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
642 struct kref pr_kref;
643 struct completion pr_comp;
644 struct se_lun_acl __rcu *se_lun_acl;
645 spinlock_t ua_lock;
646 struct se_lun __rcu *se_lun;
647 #define DEF_PR_REG_ACTIVE 1
648 unsigned long deve_flags;
649 struct list_head alua_port_list;
650 struct list_head lun_link;
651 struct list_head ua_list;
652 struct hlist_node link;
653 struct rcu_head rcu_head;
654 };
655
656 struct se_dev_attrib {
657 int emulate_model_alias;
658 int emulate_dpo;
659 int emulate_fua_write;
660 int emulate_fua_read;
661 int emulate_write_cache;
662 int emulate_ua_intlck_ctrl;
663 int emulate_tas;
664 int emulate_tpu;
665 int emulate_tpws;
666 int emulate_caw;
667 int emulate_3pc;
668 int pi_prot_format;
669 enum target_prot_type pi_prot_type;
670 enum target_prot_type hw_pi_prot_type;
671 int pi_prot_verify;
672 int enforce_pr_isids;
673 int force_pr_aptpl;
674 int is_nonrot;
675 int emulate_rest_reord;
676 int unmap_zeroes_data;
677 u32 hw_block_size;
678 u32 block_size;
679 u32 hw_max_sectors;
680 u32 optimal_sectors;
681 u32 hw_queue_depth;
682 u32 queue_depth;
683 u32 max_unmap_lba_count;
684 u32 max_unmap_block_desc_count;
685 u32 unmap_granularity;
686 u32 unmap_granularity_alignment;
687 u32 max_write_same_len;
688 u32 max_bytes_per_io;
689 struct se_device *da_dev;
690 struct config_group da_group;
691 };
692
693 struct se_port_stat_grps {
694 struct config_group stat_group;
695 struct config_group scsi_port_group;
696 struct config_group scsi_tgt_port_group;
697 struct config_group scsi_transport_group;
698 };
699
700 struct scsi_port_stats {
701 atomic_long_t cmd_pdus;
702 atomic_long_t tx_data_octets;
703 atomic_long_t rx_data_octets;
704 };
705
706 struct se_lun {
707 u64 unpacked_lun;
708 bool lun_shutdown;
709 bool lun_access_ro;
710 u32 lun_index;
711
712 /* RELATIVE TARGET PORT IDENTIFER */
713 u16 lun_rtpi;
714 atomic_t lun_acl_count;
715 struct se_device __rcu *lun_se_dev;
716
717 struct list_head lun_deve_list;
718 spinlock_t lun_deve_lock;
719
720 /* ALUA state */
721 int lun_tg_pt_secondary_stat;
722 int lun_tg_pt_secondary_write_md;
723 atomic_t lun_tg_pt_secondary_offline;
724 struct mutex lun_tg_pt_md_mutex;
725
726 /* ALUA target port group linkage */
727 struct list_head lun_tg_pt_gp_link;
728 struct t10_alua_tg_pt_gp *lun_tg_pt_gp;
729 spinlock_t lun_tg_pt_gp_lock;
730
731 struct se_portal_group *lun_tpg;
732 struct scsi_port_stats lun_stats;
733 struct config_group lun_group;
734 struct se_port_stat_grps port_stat_grps;
735 struct completion lun_ref_comp;
736 struct completion lun_shutdown_comp;
737 struct percpu_ref lun_ref;
738 struct list_head lun_dev_link;
739 struct hlist_node link;
740 struct rcu_head rcu_head;
741 };
742
743 struct se_dev_stat_grps {
744 struct config_group stat_group;
745 struct config_group scsi_dev_group;
746 struct config_group scsi_tgt_dev_group;
747 struct config_group scsi_lu_group;
748 };
749
750 struct se_device {
751 /* RELATIVE TARGET PORT IDENTIFER Counter */
752 u16 dev_rpti_counter;
753 /* Used for SAM Task Attribute ordering */
754 u32 dev_cur_ordered_id;
755 u32 dev_flags;
756 #define DF_CONFIGURED 0x00000001
757 #define DF_FIRMWARE_VPD_UNIT_SERIAL 0x00000002
758 #define DF_EMULATED_VPD_UNIT_SERIAL 0x00000004
759 #define DF_USING_UDEV_PATH 0x00000008
760 #define DF_USING_ALIAS 0x00000010
761 #define DF_READ_ONLY 0x00000020
762 /* Physical device queue depth */
763 u32 queue_depth;
764 /* Used for SPC-2 reservations enforce of ISIDs */
765 u64 dev_res_bin_isid;
766 /* Pointer to transport specific device structure */
767 u32 dev_index;
768 u64 creation_time;
769 atomic_long_t num_resets;
770 atomic_long_t aborts_complete;
771 atomic_long_t aborts_no_task;
772 atomic_long_t num_cmds;
773 atomic_long_t read_bytes;
774 atomic_long_t write_bytes;
775 /* Active commands on this virtual SE device */
776 atomic_t simple_cmds;
777 atomic_t dev_ordered_sync;
778 atomic_t dev_qf_count;
779 u32 export_count;
780 spinlock_t delayed_cmd_lock;
781 spinlock_t execute_task_lock;
782 spinlock_t dev_reservation_lock;
783 unsigned int dev_reservation_flags;
784 #define DRF_SPC2_RESERVATIONS 0x00000001
785 #define DRF_SPC2_RESERVATIONS_WITH_ISID 0x00000002
786 spinlock_t se_port_lock;
787 spinlock_t se_tmr_lock;
788 spinlock_t qf_cmd_lock;
789 struct semaphore caw_sem;
790 /* Used for legacy SPC-2 reservationsa */
791 struct se_node_acl *dev_reserved_node_acl;
792 /* Used for ALUA Logical Unit Group membership */
793 struct t10_alua_lu_gp_member *dev_alua_lu_gp_mem;
794 /* Used for SPC-3 Persistent Reservations */
795 struct t10_pr_registration *dev_pr_res_holder;
796 struct list_head dev_sep_list;
797 struct list_head dev_tmr_list;
798 struct workqueue_struct *tmr_wq;
799 struct work_struct qf_work_queue;
800 struct list_head delayed_cmd_list;
801 struct list_head state_list;
802 struct list_head qf_cmd_list;
803 /* Pointer to associated SE HBA */
804 struct se_hba *se_hba;
805 /* T10 Inquiry and VPD WWN Information */
806 struct t10_wwn t10_wwn;
807 /* T10 Asymmetric Logical Unit Assignment for Target Ports */
808 struct t10_alua t10_alua;
809 /* T10 SPC-2 + SPC-3 Reservations */
810 struct t10_reservation t10_pr;
811 struct se_dev_attrib dev_attrib;
812 struct config_group dev_action_group;
813 struct config_group dev_group;
814 struct config_group dev_pr_group;
815 struct se_dev_stat_grps dev_stat_grps;
816 #define SE_DEV_ALIAS_LEN 512 /* must be less than PAGE_SIZE */
817 unsigned char dev_alias[SE_DEV_ALIAS_LEN];
818 #define SE_UDEV_PATH_LEN 512 /* must be less than PAGE_SIZE */
819 unsigned char udev_path[SE_UDEV_PATH_LEN];
820 /* Pointer to template of function pointers for transport */
821 const struct target_backend_ops *transport;
822 struct se_lun xcopy_lun;
823 /* Protection Information */
824 int prot_length;
825 /* For se_lun->lun_se_dev RCU read-side critical access */
826 u32 hba_index;
827 struct rcu_head rcu_head;
828 };
829
830 struct se_hba {
831 u16 hba_tpgt;
832 u32 hba_id;
833 /* See hba_flags_table */
834 u32 hba_flags;
835 /* Virtual iSCSI devices attached. */
836 u32 dev_count;
837 u32 hba_index;
838 /* Pointer to transport specific host structure. */
839 void *hba_ptr;
840 struct list_head hba_node;
841 spinlock_t device_lock;
842 struct config_group hba_group;
843 struct mutex hba_access_mutex;
844 struct target_backend *backend;
845 };
846
847 struct se_tpg_np {
848 struct se_portal_group *tpg_np_parent;
849 struct config_group tpg_np_group;
850 };
851
852 static inline struct se_tpg_np *to_tpg_np(struct config_item *item)
853 {
854 return container_of(to_config_group(item), struct se_tpg_np,
855 tpg_np_group);
856 }
857
858 struct se_portal_group {
859 /*
860 * PROTOCOL IDENTIFIER value per SPC4, 7.5.1.
861 *
862 * Negative values can be used by fabric drivers for internal use TPGs.
863 */
864 int proto_id;
865 /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
866 atomic_t tpg_pr_ref_count;
867 /* Spinlock for adding/removing ACLed Nodes */
868 struct mutex acl_node_mutex;
869 /* Spinlock for adding/removing sessions */
870 spinlock_t session_lock;
871 struct mutex tpg_lun_mutex;
872 struct list_head se_tpg_node;
873 /* linked list for initiator ACL list */
874 struct list_head acl_node_list;
875 struct hlist_head tpg_lun_hlist;
876 struct se_lun *tpg_virt_lun0;
877 /* List of TCM sessions associated wth this TPG */
878 struct list_head tpg_sess_list;
879 /* Pointer to $FABRIC_MOD dependent code */
880 const struct target_core_fabric_ops *se_tpg_tfo;
881 struct se_wwn *se_tpg_wwn;
882 struct config_group tpg_group;
883 struct config_group tpg_lun_group;
884 struct config_group tpg_np_group;
885 struct config_group tpg_acl_group;
886 struct config_group tpg_attrib_group;
887 struct config_group tpg_auth_group;
888 struct config_group tpg_param_group;
889 };
890
891 static inline struct se_portal_group *to_tpg(struct config_item *item)
892 {
893 return container_of(to_config_group(item), struct se_portal_group,
894 tpg_group);
895 }
896
897 static inline struct se_portal_group *attrib_to_tpg(struct config_item *item)
898 {
899 return container_of(to_config_group(item), struct se_portal_group,
900 tpg_attrib_group);
901 }
902
903 static inline struct se_portal_group *auth_to_tpg(struct config_item *item)
904 {
905 return container_of(to_config_group(item), struct se_portal_group,
906 tpg_auth_group);
907 }
908
909 static inline struct se_portal_group *param_to_tpg(struct config_item *item)
910 {
911 return container_of(to_config_group(item), struct se_portal_group,
912 tpg_param_group);
913 }
914
915 struct se_wwn {
916 struct target_fabric_configfs *wwn_tf;
917 void *priv;
918 struct config_group wwn_group;
919 struct config_group fabric_stat_group;
920 };
921
922 static inline void atomic_inc_mb(atomic_t *v)
923 {
924 smp_mb__before_atomic();
925 atomic_inc(v);
926 smp_mb__after_atomic();
927 }
928
929 static inline void atomic_dec_mb(atomic_t *v)
930 {
931 smp_mb__before_atomic();
932 atomic_dec(v);
933 smp_mb__after_atomic();
934 }
935
936 static inline void target_free_tag(struct se_session *sess, struct se_cmd *cmd)
937 {
938 sbitmap_queue_clear(&sess->sess_tag_pool, cmd->map_tag, cmd->map_cpu);
939 }
940
941 #endif /* TARGET_CORE_BASE_H */
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