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Linux 4.13.16
[linux/fpc-iii.git] / include / target / target_core_base.h
blob516764febeb78c2c8cb2a34ce6c54aa10ff36c3f
1 #ifndef TARGET_CORE_BASE_H
2 #define TARGET_CORE_BASE_H
3
4 #include <linux/configfs.h> /* struct config_group */
5 #include <linux/dma-direction.h> /* enum dma_data_direction */
6 #include <linux/percpu_ida.h> /* struct percpu_ida */
7 #include <linux/percpu-refcount.h>
8 #include <linux/semaphore.h> /* struct semaphore */
9 #include <linux/completion.h>
10
11 #define TARGET_CORE_VERSION "v5.0"
12
13 /*
14 * Maximum size of a CDB that can be stored in se_cmd without allocating
15 * memory dynamically for the CDB.
16 */
17 #define TCM_MAX_COMMAND_SIZE 32
18 /*
19 * From include/scsi/scsi_cmnd.h:SCSI_SENSE_BUFFERSIZE, currently
20 * defined 96, but the real limit is 252 (or 260 including the header)
21 */
22 #define TRANSPORT_SENSE_BUFFER 96
23 /* Used by transport_send_check_condition_and_sense() */
24 #define SPC_SENSE_KEY_OFFSET 2
25 #define SPC_ADD_SENSE_LEN_OFFSET 7
26 #define SPC_DESC_TYPE_OFFSET 8
27 #define SPC_ADDITIONAL_DESC_LEN_OFFSET 9
28 #define SPC_VALIDITY_OFFSET 10
29 #define SPC_ASC_KEY_OFFSET 12
30 #define SPC_ASCQ_KEY_OFFSET 13
31 #define TRANSPORT_IQN_LEN 224
32 /* Used by target_core_store_alua_lu_gp() and target_core_alua_lu_gp_show_attr_members() */
33 #define LU_GROUP_NAME_BUF 256
34 /* Used by core_alua_store_tg_pt_gp_info() and target_core_alua_tg_pt_gp_show_attr_members() */
35 #define TG_PT_GROUP_NAME_BUF 256
36 /* Used to parse VPD into struct t10_vpd */
37 #define VPD_TMP_BUF_SIZE 254
38 /* Used by transport_generic_cmd_sequencer() */
39 #define READ_BLOCK_LEN 6
40 #define READ_CAP_LEN 8
41 #define READ_POSITION_LEN 20
42 #define INQUIRY_LEN 36
43 /* Used by transport_get_inquiry_vpd_serial() */
44 #define INQUIRY_VPD_SERIAL_LEN 254
45 /* Used by transport_get_inquiry_vpd_device_ident() */
46 #define INQUIRY_VPD_DEVICE_IDENTIFIER_LEN 254
47
48 /* Attempts before moving from SHORT to LONG */
49 #define PYX_TRANSPORT_WINDOW_CLOSED_THRESHOLD 3
50 #define PYX_TRANSPORT_WINDOW_CLOSED_WAIT_SHORT 3 /* In milliseconds */
51 #define PYX_TRANSPORT_WINDOW_CLOSED_WAIT_LONG 10 /* In milliseconds */
52
53 #define PYX_TRANSPORT_STATUS_INTERVAL 5 /* In seconds */
54
55 /* struct se_dev_attrib sanity values */
56 /* Default max_unmap_lba_count */
57 #define DA_MAX_UNMAP_LBA_COUNT 0
58 /* Default max_unmap_block_desc_count */
59 #define DA_MAX_UNMAP_BLOCK_DESC_COUNT 0
60 /* Default unmap_granularity */
61 #define DA_UNMAP_GRANULARITY_DEFAULT 0
62 /* Default unmap_granularity_alignment */
63 #define DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT 0
64 /* Default unmap_zeroes_data */
65 #define DA_UNMAP_ZEROES_DATA_DEFAULT 0
66 /* Default max_write_same_len, disabled by default */
67 #define DA_MAX_WRITE_SAME_LEN 0
68 /* Use a model alias based on the configfs backend device name */
69 #define DA_EMULATE_MODEL_ALIAS 0
70 /* Emulation for WriteCache and SYNCHRONIZE_CACHE */
71 #define DA_EMULATE_WRITE_CACHE 0
72 /* Emulation for UNIT ATTENTION Interlock Control */
73 #define DA_EMULATE_UA_INTLLCK_CTRL 0
74 /* Emulation for TASK_ABORTED status (TAS) by default */
75 #define DA_EMULATE_TAS 1
76 /* Emulation for Thin Provisioning UNMAP using block/blk-lib.c:blkdev_issue_discard() */
77 #define DA_EMULATE_TPU 0
78 /*
79 * Emulation for Thin Provisioning WRITE_SAME w/ UNMAP=1 bit using
80 * block/blk-lib.c:blkdev_issue_discard()
81 */
82 #define DA_EMULATE_TPWS 0
83 /* Emulation for CompareAndWrite (AtomicTestandSet) by default */
84 #define DA_EMULATE_CAW 1
85 /* Emulation for 3rd Party Copy (ExtendedCopy) by default */
86 #define DA_EMULATE_3PC 1
87 /* No Emulation for PSCSI by default */
88 #define DA_EMULATE_ALUA 0
89 /* Enforce SCSI Initiator Port TransportID with 'ISID' for PR */
90 #define DA_ENFORCE_PR_ISIDS 1
91 /* Force SPC-3 PR Activate Persistence across Target Power Loss */
92 #define DA_FORCE_PR_APTPL 0
93 #define DA_STATUS_MAX_SECTORS_MIN 16
94 #define DA_STATUS_MAX_SECTORS_MAX 8192
95 /* By default don't report non-rotating (solid state) medium */
96 #define DA_IS_NONROT 0
97 /* Queue Algorithm Modifier default for restricted reordering in control mode page */
98 #define DA_EMULATE_REST_REORD 0
99
100 #define SE_INQUIRY_BUF 1024
101 #define SE_MODE_PAGE_BUF 512
102 #define SE_SENSE_BUF 96
103
104 /* struct se_hba->hba_flags */
105 enum hba_flags_table {
106 HBA_FLAGS_INTERNAL_USE = 0x01,
107 HBA_FLAGS_PSCSI_MODE = 0x02,
108 };
109
110 /* Special transport agnostic struct se_cmd->t_states */
111 enum transport_state_table {
112 TRANSPORT_NO_STATE = 0,
113 TRANSPORT_NEW_CMD = 1,
114 TRANSPORT_WRITE_PENDING = 3,
115 TRANSPORT_PROCESSING = 5,
116 TRANSPORT_COMPLETE = 6,
117 TRANSPORT_ISTATE_PROCESSING = 11,
118 TRANSPORT_COMPLETE_QF_WP = 18,
119 TRANSPORT_COMPLETE_QF_OK = 19,
120 TRANSPORT_COMPLETE_QF_ERR = 20,
121 };
122
123 /* Used for struct se_cmd->se_cmd_flags */
124 enum se_cmd_flags_table {
125 SCF_SUPPORTED_SAM_OPCODE = 0x00000001,
126 SCF_TRANSPORT_TASK_SENSE = 0x00000002,
127 SCF_EMULATED_TASK_SENSE = 0x00000004,
128 SCF_SCSI_DATA_CDB = 0x00000008,
129 SCF_SCSI_TMR_CDB = 0x00000010,
130 SCF_FUA = 0x00000080,
131 SCF_SE_LUN_CMD = 0x00000100,
132 SCF_BIDI = 0x00000400,
133 SCF_SENT_CHECK_CONDITION = 0x00000800,
134 SCF_OVERFLOW_BIT = 0x00001000,
135 SCF_UNDERFLOW_BIT = 0x00002000,
136 SCF_SEND_DELAYED_TAS = 0x00004000,
137 SCF_ALUA_NON_OPTIMIZED = 0x00008000,
138 SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC = 0x00020000,
139 SCF_COMPARE_AND_WRITE = 0x00080000,
140 SCF_COMPARE_AND_WRITE_POST = 0x00100000,
141 SCF_PASSTHROUGH_PROT_SG_TO_MEM_NOALLOC = 0x00200000,
142 SCF_ACK_KREF = 0x00400000,
143 SCF_USE_CPUID = 0x00800000,
144 SCF_TASK_ATTR_SET = 0x01000000,
145 };
146
147 /*
148 * Used by transport_send_check_condition_and_sense()
149 * to signal which ASC/ASCQ sense payload should be built.
150 */
151 typedef unsigned __bitwise sense_reason_t;
152
153 enum tcm_sense_reason_table {
154 #define R(x) (__force sense_reason_t )(x)
155 TCM_NO_SENSE = R(0x00),
156 TCM_NON_EXISTENT_LUN = R(0x01),
157 TCM_UNSUPPORTED_SCSI_OPCODE = R(0x02),
158 TCM_INCORRECT_AMOUNT_OF_DATA = R(0x03),
159 TCM_UNEXPECTED_UNSOLICITED_DATA = R(0x04),
160 TCM_SERVICE_CRC_ERROR = R(0x05),
161 TCM_SNACK_REJECTED = R(0x06),
162 TCM_SECTOR_COUNT_TOO_MANY = R(0x07),
163 TCM_INVALID_CDB_FIELD = R(0x08),
164 TCM_INVALID_PARAMETER_LIST = R(0x09),
165 TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE = R(0x0a),
166 TCM_UNKNOWN_MODE_PAGE = R(0x0b),
167 TCM_WRITE_PROTECTED = R(0x0c),
168 TCM_CHECK_CONDITION_ABORT_CMD = R(0x0d),
169 TCM_CHECK_CONDITION_UNIT_ATTENTION = R(0x0e),
170 TCM_CHECK_CONDITION_NOT_READY = R(0x0f),
171 TCM_RESERVATION_CONFLICT = R(0x10),
172 TCM_ADDRESS_OUT_OF_RANGE = R(0x11),
173 TCM_OUT_OF_RESOURCES = R(0x12),
174 TCM_PARAMETER_LIST_LENGTH_ERROR = R(0x13),
175 TCM_MISCOMPARE_VERIFY = R(0x14),
176 TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED = R(0x15),
177 TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED = R(0x16),
178 TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED = R(0x17),
179 TCM_COPY_TARGET_DEVICE_NOT_REACHABLE = R(0x18),
180 TCM_TOO_MANY_TARGET_DESCS = R(0x19),
181 TCM_UNSUPPORTED_TARGET_DESC_TYPE_CODE = R(0x1a),
182 TCM_TOO_MANY_SEGMENT_DESCS = R(0x1b),
183 TCM_UNSUPPORTED_SEGMENT_DESC_TYPE_CODE = R(0x1c),
184 #undef R
185 };
186
187 enum target_sc_flags_table {
188 TARGET_SCF_BIDI_OP = 0x01,
189 TARGET_SCF_ACK_KREF = 0x02,
190 TARGET_SCF_UNKNOWN_SIZE = 0x04,
191 TARGET_SCF_USE_CPUID = 0x08,
192 TARGET_SCF_LOOKUP_LUN_FROM_TAG = 0x10,
193 };
194
195 /* fabric independent task management function values */
196 enum tcm_tmreq_table {
197 TMR_ABORT_TASK = 1,
198 TMR_ABORT_TASK_SET = 2,
199 TMR_CLEAR_ACA = 3,
200 TMR_CLEAR_TASK_SET = 4,
201 TMR_LUN_RESET = 5,
202 TMR_TARGET_WARM_RESET = 6,
203 TMR_TARGET_COLD_RESET = 7,
204 TMR_UNKNOWN = 0xff,
205 };
206
207 /* fabric independent task management response values */
208 enum tcm_tmrsp_table {
209 TMR_FUNCTION_FAILED = 0,
210 TMR_FUNCTION_COMPLETE = 1,
211 TMR_TASK_DOES_NOT_EXIST = 2,
212 TMR_LUN_DOES_NOT_EXIST = 3,
213 TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED = 4,
214 TMR_FUNCTION_REJECTED = 5,
215 };
216
217 /*
218 * Used for target SCSI statistics
219 */
220 typedef enum {
221 SCSI_INST_INDEX,
222 SCSI_AUTH_INTR_INDEX,
223 SCSI_INDEX_TYPE_MAX
224 } scsi_index_t;
225
226 struct se_cmd;
227
228 struct t10_alua_lba_map_member {
229 struct list_head lba_map_mem_list;
230 int lba_map_mem_alua_state;
231 int lba_map_mem_alua_pg_id;
232 };
233
234 struct t10_alua_lba_map {
235 u64 lba_map_first_lba;
236 u64 lba_map_last_lba;
237 struct list_head lba_map_list;
238 struct list_head lba_map_mem_list;
239 };
240
241 struct t10_alua {
242 /* ALUA Target Port Group ID */
243 u16 alua_tg_pt_gps_counter;
244 u32 alua_tg_pt_gps_count;
245 /* Referrals support */
246 spinlock_t lba_map_lock;
247 u32 lba_map_segment_size;
248 u32 lba_map_segment_multiplier;
249 struct list_head lba_map_list;
250 spinlock_t tg_pt_gps_lock;
251 struct se_device *t10_dev;
252 /* Used for default ALUA Target Port Group */
253 struct t10_alua_tg_pt_gp *default_tg_pt_gp;
254 /* Used for default ALUA Target Port Group ConfigFS group */
255 struct config_group alua_tg_pt_gps_group;
256 struct list_head tg_pt_gps_list;
257 };
258
259 struct t10_alua_lu_gp {
260 u16 lu_gp_id;
261 int lu_gp_valid_id;
262 u32 lu_gp_members;
263 atomic_t lu_gp_ref_cnt;
264 spinlock_t lu_gp_lock;
265 struct config_group lu_gp_group;
266 struct list_head lu_gp_node;
267 struct list_head lu_gp_mem_list;
268 };
269
270 struct t10_alua_lu_gp_member {
271 bool lu_gp_assoc;
272 atomic_t lu_gp_mem_ref_cnt;
273 spinlock_t lu_gp_mem_lock;
274 struct t10_alua_lu_gp *lu_gp;
275 struct se_device *lu_gp_mem_dev;
276 struct list_head lu_gp_mem_list;
277 };
278
279 struct t10_alua_tg_pt_gp {
280 u16 tg_pt_gp_id;
281 int tg_pt_gp_valid_id;
282 int tg_pt_gp_alua_supported_states;
283 int tg_pt_gp_alua_access_status;
284 int tg_pt_gp_alua_access_type;
285 int tg_pt_gp_nonop_delay_msecs;
286 int tg_pt_gp_trans_delay_msecs;
287 int tg_pt_gp_implicit_trans_secs;
288 int tg_pt_gp_pref;
289 int tg_pt_gp_write_metadata;
290 u32 tg_pt_gp_members;
291 int tg_pt_gp_alua_access_state;
292 atomic_t tg_pt_gp_ref_cnt;
293 spinlock_t tg_pt_gp_lock;
294 struct mutex tg_pt_gp_transition_mutex;
295 struct se_device *tg_pt_gp_dev;
296 struct config_group tg_pt_gp_group;
297 struct list_head tg_pt_gp_list;
298 struct list_head tg_pt_gp_lun_list;
299 struct se_lun *tg_pt_gp_alua_lun;
300 struct se_node_acl *tg_pt_gp_alua_nacl;
301 };
302
303 struct t10_vpd {
304 unsigned char device_identifier[INQUIRY_VPD_DEVICE_IDENTIFIER_LEN];
305 int protocol_identifier_set;
306 u32 protocol_identifier;
307 u32 device_identifier_code_set;
308 u32 association;
309 u32 device_identifier_type;
310 struct list_head vpd_list;
311 };
312
313 struct t10_wwn {
314 char vendor[8];
315 char model[16];
316 char revision[4];
317 char unit_serial[INQUIRY_VPD_SERIAL_LEN];
318 spinlock_t t10_vpd_lock;
319 struct se_device *t10_dev;
320 struct config_group t10_wwn_group;
321 struct list_head t10_vpd_list;
322 };
323
324 struct t10_pr_registration {
325 /* Used for fabrics that contain WWN+ISID */
326 #define PR_REG_ISID_LEN 16
327 /* PR_REG_ISID_LEN + ',i,0x' */
328 #define PR_REG_ISID_ID_LEN (PR_REG_ISID_LEN + 5)
329 char pr_reg_isid[PR_REG_ISID_LEN];
330 /* Used during APTPL metadata reading */
331 #define PR_APTPL_MAX_IPORT_LEN 256
332 unsigned char pr_iport[PR_APTPL_MAX_IPORT_LEN];
333 /* Used during APTPL metadata reading */
334 #define PR_APTPL_MAX_TPORT_LEN 256
335 unsigned char pr_tport[PR_APTPL_MAX_TPORT_LEN];
336 u16 pr_aptpl_rpti;
337 u16 pr_reg_tpgt;
338 /* Reservation effects all target ports */
339 int pr_reg_all_tg_pt;
340 /* Activate Persistence across Target Power Loss */
341 int pr_reg_aptpl;
342 int pr_res_holder;
343 int pr_res_type;
344 int pr_res_scope;
345 /* Used for fabric initiator WWPNs using a ISID */
346 bool isid_present_at_reg;
347 u64 pr_res_mapped_lun;
348 u64 pr_aptpl_target_lun;
349 u16 tg_pt_sep_rtpi;
350 u32 pr_res_generation;
351 u64 pr_reg_bin_isid;
352 u64 pr_res_key;
353 atomic_t pr_res_holders;
354 struct se_node_acl *pr_reg_nacl;
355 /* Used by ALL_TG_PT=1 registration with deve->pr_ref taken */
356 struct se_dev_entry *pr_reg_deve;
357 struct list_head pr_reg_list;
358 struct list_head pr_reg_abort_list;
359 struct list_head pr_reg_aptpl_list;
360 struct list_head pr_reg_atp_list;
361 struct list_head pr_reg_atp_mem_list;
362 };
363
364 struct t10_reservation {
365 /* Reservation effects all target ports */
366 int pr_all_tg_pt;
367 /* Activate Persistence across Target Power Loss enabled
368 * for SCSI device */
369 int pr_aptpl_active;
370 #define PR_APTPL_BUF_LEN 262144
371 u32 pr_generation;
372 spinlock_t registration_lock;
373 spinlock_t aptpl_reg_lock;
374 /*
375 * This will always be set by one individual I_T Nexus.
376 * However with all_tg_pt=1, other I_T Nexus from the
377 * same initiator can access PR reg/res info on a different
378 * target port.
379 *
380 * There is also the 'All Registrants' case, where there is
381 * a single *pr_res_holder of the reservation, but all
382 * registrations are considered reservation holders.
383 */
384 struct se_node_acl *pr_res_holder;
385 struct list_head registration_list;
386 struct list_head aptpl_reg_list;
387 };
388
389 struct se_tmr_req {
390 /* Task Management function to be performed */
391 u8 function;
392 /* Task Management response to send */
393 u8 response;
394 int call_transport;
395 /* Reference to ITT that Task Mgmt should be performed */
396 u64 ref_task_tag;
397 void *fabric_tmr_ptr;
398 struct se_cmd *task_cmd;
399 struct se_device *tmr_dev;
400 struct list_head tmr_list;
401 };
402
403 enum target_prot_op {
404 TARGET_PROT_NORMAL = 0,
405 TARGET_PROT_DIN_INSERT = (1 << 0),
406 TARGET_PROT_DOUT_INSERT = (1 << 1),
407 TARGET_PROT_DIN_STRIP = (1 << 2),
408 TARGET_PROT_DOUT_STRIP = (1 << 3),
409 TARGET_PROT_DIN_PASS = (1 << 4),
410 TARGET_PROT_DOUT_PASS = (1 << 5),
411 };
412
413 #define TARGET_PROT_ALL TARGET_PROT_DIN_INSERT | TARGET_PROT_DOUT_INSERT | \
414 TARGET_PROT_DIN_STRIP | TARGET_PROT_DOUT_STRIP | \
415 TARGET_PROT_DIN_PASS | TARGET_PROT_DOUT_PASS
416
417 enum target_prot_type {
418 TARGET_DIF_TYPE0_PROT,
419 TARGET_DIF_TYPE1_PROT,
420 TARGET_DIF_TYPE2_PROT,
421 TARGET_DIF_TYPE3_PROT,
422 };
423
424 enum target_core_dif_check {
425 TARGET_DIF_CHECK_GUARD = 0x1 << 0,
426 TARGET_DIF_CHECK_APPTAG = 0x1 << 1,
427 TARGET_DIF_CHECK_REFTAG = 0x1 << 2,
428 };
429
430 /* for sam_task_attr */
431 #define TCM_SIMPLE_TAG 0x20
432 #define TCM_HEAD_TAG 0x21
433 #define TCM_ORDERED_TAG 0x22
434 #define TCM_ACA_TAG 0x24
435
436 struct se_cmd {
437 /* SAM response code being sent to initiator */
438 u8 scsi_status;
439 u8 scsi_asc;
440 u8 scsi_ascq;
441 u16 scsi_sense_length;
442 unsigned cmd_wait_set:1;
443 unsigned unknown_data_length:1;
444 bool state_active:1;
445 u64 tag; /* SAM command identifier aka task tag */
446 /* Delay for ALUA Active/NonOptimized state access in milliseconds */
447 int alua_nonop_delay;
448 /* See include/linux/dma-mapping.h */
449 enum dma_data_direction data_direction;
450 /* For SAM Task Attribute */
451 int sam_task_attr;
452 /* Used for se_sess->sess_tag_pool */
453 unsigned int map_tag;
454 /* Transport protocol dependent state, see transport_state_table */
455 enum transport_state_table t_state;
456 /* See se_cmd_flags_table */
457 u32 se_cmd_flags;
458 /* Total size in bytes associated with command */
459 u32 data_length;
460 u32 residual_count;
461 u64 orig_fe_lun;
462 /* Persistent Reservation key */
463 u64 pr_res_key;
464 /* Used for sense data */
465 void *sense_buffer;
466 struct list_head se_delayed_node;
467 struct list_head se_qf_node;
468 struct se_device *se_dev;
469 struct se_lun *se_lun;
470 /* Only used for internal passthrough and legacy TCM fabric modules */
471 struct se_session *se_sess;
472 struct se_tmr_req *se_tmr_req;
473 struct list_head se_cmd_list;
474 struct completion cmd_wait_comp;
475 const struct target_core_fabric_ops *se_tfo;
476 sense_reason_t (*execute_cmd)(struct se_cmd *);
477 sense_reason_t (*transport_complete_callback)(struct se_cmd *, bool, int *);
478 void *protocol_data;
479
480 unsigned char *t_task_cdb;
481 unsigned char __t_task_cdb[TCM_MAX_COMMAND_SIZE];
482 unsigned long long t_task_lba;
483 unsigned int t_task_nolb;
484 unsigned int transport_state;
485 #define CMD_T_ABORTED (1 << 0)
486 #define CMD_T_ACTIVE (1 << 1)
487 #define CMD_T_COMPLETE (1 << 2)
488 #define CMD_T_SENT (1 << 4)
489 #define CMD_T_STOP (1 << 5)
490 #define CMD_T_TAS (1 << 10)
491 #define CMD_T_FABRIC_STOP (1 << 11)
492 spinlock_t t_state_lock;
493 struct kref cmd_kref;
494 struct completion t_transport_stop_comp;
495
496 struct work_struct work;
497
498 struct scatterlist *t_data_sg;
499 struct scatterlist *t_data_sg_orig;
500 unsigned int t_data_nents;
501 unsigned int t_data_nents_orig;
502 void *t_data_vmap;
503 struct scatterlist *t_bidi_data_sg;
504 unsigned int t_bidi_data_nents;
505
506 /* Used for lun->lun_ref counting */
507 int lun_ref_active;
508
509 struct list_head state_list;
510
511 /* backend private data */
512 void *priv;
513
514 /* DIF related members */
515 enum target_prot_op prot_op;
516 enum target_prot_type prot_type;
517 u8 prot_checks;
518 bool prot_pto;
519 u32 prot_length;
520 u32 reftag_seed;
521 struct scatterlist *t_prot_sg;
522 unsigned int t_prot_nents;
523 sense_reason_t pi_err;
524 sector_t bad_sector;
525 int cpuid;
526 };
527
528 struct se_ua {
529 u8 ua_asc;
530 u8 ua_ascq;
531 struct list_head ua_nacl_list;
532 };
533
534 struct se_node_acl {
535 char initiatorname[TRANSPORT_IQN_LEN];
536 /* Used to signal demo mode created ACL, disabled by default */
537 bool dynamic_node_acl;
538 bool dynamic_stop;
539 u32 queue_depth;
540 u32 acl_index;
541 enum target_prot_type saved_prot_type;
542 #define MAX_ACL_TAG_SIZE 64
543 char acl_tag[MAX_ACL_TAG_SIZE];
544 /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
545 atomic_t acl_pr_ref_count;
546 struct hlist_head lun_entry_hlist;
547 struct se_session *nacl_sess;
548 struct se_portal_group *se_tpg;
549 struct mutex lun_entry_mutex;
550 spinlock_t nacl_sess_lock;
551 struct config_group acl_group;
552 struct config_group acl_attrib_group;
553 struct config_group acl_auth_group;
554 struct config_group acl_param_group;
555 struct config_group acl_fabric_stat_group;
556 struct list_head acl_list;
557 struct list_head acl_sess_list;
558 struct completion acl_free_comp;
559 struct kref acl_kref;
560 };
561
562 static inline struct se_node_acl *acl_to_nacl(struct config_item *item)
563 {
564 return container_of(to_config_group(item), struct se_node_acl,
565 acl_group);
566 }
567
568 static inline struct se_node_acl *attrib_to_nacl(struct config_item *item)
569 {
570 return container_of(to_config_group(item), struct se_node_acl,
571 acl_attrib_group);
572 }
573
574 static inline struct se_node_acl *auth_to_nacl(struct config_item *item)
575 {
576 return container_of(to_config_group(item), struct se_node_acl,
577 acl_auth_group);
578 }
579
580 static inline struct se_node_acl *param_to_nacl(struct config_item *item)
581 {
582 return container_of(to_config_group(item), struct se_node_acl,
583 acl_param_group);
584 }
585
586 static inline struct se_node_acl *fabric_stat_to_nacl(struct config_item *item)
587 {
588 return container_of(to_config_group(item), struct se_node_acl,
589 acl_fabric_stat_group);
590 }
591
592 struct se_session {
593 unsigned sess_tearing_down:1;
594 u64 sess_bin_isid;
595 enum target_prot_op sup_prot_ops;
596 enum target_prot_type sess_prot_type;
597 struct se_node_acl *se_node_acl;
598 struct se_portal_group *se_tpg;
599 void *fabric_sess_ptr;
600 struct list_head sess_list;
601 struct list_head sess_acl_list;
602 struct list_head sess_cmd_list;
603 struct list_head sess_wait_list;
604 spinlock_t sess_cmd_lock;
605 void *sess_cmd_map;
606 struct percpu_ida sess_tag_pool;
607 };
608
609 struct se_device;
610 struct se_transform_info;
611 struct scatterlist;
612
613 struct se_ml_stat_grps {
614 struct config_group stat_group;
615 struct config_group scsi_auth_intr_group;
616 struct config_group scsi_att_intr_port_group;
617 };
618
619 struct se_lun_acl {
620 u64 mapped_lun;
621 struct se_node_acl *se_lun_nacl;
622 struct se_lun *se_lun;
623 struct config_group se_lun_group;
624 struct se_ml_stat_grps ml_stat_grps;
625 };
626
627 struct se_dev_entry {
628 u64 mapped_lun;
629 u64 pr_res_key;
630 u64 creation_time;
631 bool lun_access_ro;
632 u32 attach_count;
633 atomic_long_t total_cmds;
634 atomic_long_t read_bytes;
635 atomic_long_t write_bytes;
636 atomic_t ua_count;
637 /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
638 struct kref pr_kref;
639 struct completion pr_comp;
640 struct se_lun_acl __rcu *se_lun_acl;
641 spinlock_t ua_lock;
642 struct se_lun __rcu *se_lun;
643 #define DEF_PR_REG_ACTIVE 1
644 unsigned long deve_flags;
645 struct list_head alua_port_list;
646 struct list_head lun_link;
647 struct list_head ua_list;
648 struct hlist_node link;
649 struct rcu_head rcu_head;
650 };
651
652 struct se_dev_attrib {
653 int emulate_model_alias;
654 int emulate_dpo;
655 int emulate_fua_write;
656 int emulate_fua_read;
657 int emulate_write_cache;
658 int emulate_ua_intlck_ctrl;
659 int emulate_tas;
660 int emulate_tpu;
661 int emulate_tpws;
662 int emulate_caw;
663 int emulate_3pc;
664 int pi_prot_format;
665 enum target_prot_type pi_prot_type;
666 enum target_prot_type hw_pi_prot_type;
667 int pi_prot_verify;
668 int enforce_pr_isids;
669 int force_pr_aptpl;
670 int is_nonrot;
671 int emulate_rest_reord;
672 int unmap_zeroes_data;
673 u32 hw_block_size;
674 u32 block_size;
675 u32 hw_max_sectors;
676 u32 optimal_sectors;
677 u32 hw_queue_depth;
678 u32 queue_depth;
679 u32 max_unmap_lba_count;
680 u32 max_unmap_block_desc_count;
681 u32 unmap_granularity;
682 u32 unmap_granularity_alignment;
683 u32 max_write_same_len;
684 u32 max_bytes_per_io;
685 struct se_device *da_dev;
686 struct config_group da_group;
687 };
688
689 struct se_port_stat_grps {
690 struct config_group stat_group;
691 struct config_group scsi_port_group;
692 struct config_group scsi_tgt_port_group;
693 struct config_group scsi_transport_group;
694 };
695
696 struct scsi_port_stats {
697 atomic_long_t cmd_pdus;
698 atomic_long_t tx_data_octets;
699 atomic_long_t rx_data_octets;
700 };
701
702 struct se_lun {
703 u64 unpacked_lun;
704 bool lun_shutdown;
705 bool lun_access_ro;
706 u32 lun_index;
707
708 /* RELATIVE TARGET PORT IDENTIFER */
709 u16 lun_rtpi;
710 atomic_t lun_acl_count;
711 struct se_device __rcu *lun_se_dev;
712
713 struct list_head lun_deve_list;
714 spinlock_t lun_deve_lock;
715
716 /* ALUA state */
717 int lun_tg_pt_secondary_stat;
718 int lun_tg_pt_secondary_write_md;
719 atomic_t lun_tg_pt_secondary_offline;
720 struct mutex lun_tg_pt_md_mutex;
721
722 /* ALUA target port group linkage */
723 struct list_head lun_tg_pt_gp_link;
724 struct t10_alua_tg_pt_gp *lun_tg_pt_gp;
725 spinlock_t lun_tg_pt_gp_lock;
726
727 struct se_portal_group *lun_tpg;
728 struct scsi_port_stats lun_stats;
729 struct config_group lun_group;
730 struct se_port_stat_grps port_stat_grps;
731 struct completion lun_ref_comp;
732 struct completion lun_shutdown_comp;
733 struct percpu_ref lun_ref;
734 struct list_head lun_dev_link;
735 struct hlist_node link;
736 struct rcu_head rcu_head;
737 };
738
739 struct se_dev_stat_grps {
740 struct config_group stat_group;
741 struct config_group scsi_dev_group;
742 struct config_group scsi_tgt_dev_group;
743 struct config_group scsi_lu_group;
744 };
745
746 struct se_device {
747 /* RELATIVE TARGET PORT IDENTIFER Counter */
748 u16 dev_rpti_counter;
749 /* Used for SAM Task Attribute ordering */
750 u32 dev_cur_ordered_id;
751 u32 dev_flags;
752 #define DF_CONFIGURED 0x00000001
753 #define DF_FIRMWARE_VPD_UNIT_SERIAL 0x00000002
754 #define DF_EMULATED_VPD_UNIT_SERIAL 0x00000004
755 #define DF_USING_UDEV_PATH 0x00000008
756 #define DF_USING_ALIAS 0x00000010
757 #define DF_READ_ONLY 0x00000020
758 /* Physical device queue depth */
759 u32 queue_depth;
760 /* Used for SPC-2 reservations enforce of ISIDs */
761 u64 dev_res_bin_isid;
762 /* Pointer to transport specific device structure */
763 u32 dev_index;
764 u64 creation_time;
765 atomic_long_t num_resets;
766 atomic_long_t aborts_complete;
767 atomic_long_t aborts_no_task;
768 atomic_long_t num_cmds;
769 atomic_long_t read_bytes;
770 atomic_long_t write_bytes;
771 /* Active commands on this virtual SE device */
772 atomic_t simple_cmds;
773 atomic_t dev_ordered_sync;
774 atomic_t dev_qf_count;
775 u32 export_count;
776 spinlock_t delayed_cmd_lock;
777 spinlock_t execute_task_lock;
778 spinlock_t dev_reservation_lock;
779 unsigned int dev_reservation_flags;
780 #define DRF_SPC2_RESERVATIONS 0x00000001
781 #define DRF_SPC2_RESERVATIONS_WITH_ISID 0x00000002
782 spinlock_t se_port_lock;
783 spinlock_t se_tmr_lock;
784 spinlock_t qf_cmd_lock;
785 struct semaphore caw_sem;
786 /* Used for legacy SPC-2 reservationsa */
787 struct se_node_acl *dev_reserved_node_acl;
788 /* Used for ALUA Logical Unit Group membership */
789 struct t10_alua_lu_gp_member *dev_alua_lu_gp_mem;
790 /* Used for SPC-3 Persistent Reservations */
791 struct t10_pr_registration *dev_pr_res_holder;
792 struct list_head dev_sep_list;
793 struct list_head dev_tmr_list;
794 struct workqueue_struct *tmr_wq;
795 struct work_struct qf_work_queue;
796 struct list_head delayed_cmd_list;
797 struct list_head state_list;
798 struct list_head qf_cmd_list;
799 /* Pointer to associated SE HBA */
800 struct se_hba *se_hba;
801 /* T10 Inquiry and VPD WWN Information */
802 struct t10_wwn t10_wwn;
803 /* T10 Asymmetric Logical Unit Assignment for Target Ports */
804 struct t10_alua t10_alua;
805 /* T10 SPC-2 + SPC-3 Reservations */
806 struct t10_reservation t10_pr;
807 struct se_dev_attrib dev_attrib;
808 struct config_group dev_group;
809 struct config_group dev_pr_group;
810 struct se_dev_stat_grps dev_stat_grps;
811 #define SE_DEV_ALIAS_LEN 512 /* must be less than PAGE_SIZE */
812 unsigned char dev_alias[SE_DEV_ALIAS_LEN];
813 #define SE_UDEV_PATH_LEN 512 /* must be less than PAGE_SIZE */
814 unsigned char udev_path[SE_UDEV_PATH_LEN];
815 /* Pointer to template of function pointers for transport */
816 const struct target_backend_ops *transport;
817 struct se_lun xcopy_lun;
818 /* Protection Information */
819 int prot_length;
820 /* For se_lun->lun_se_dev RCU read-side critical access */
821 u32 hba_index;
822 struct rcu_head rcu_head;
823 };
824
825 struct se_hba {
826 u16 hba_tpgt;
827 u32 hba_id;
828 /* See hba_flags_table */
829 u32 hba_flags;
830 /* Virtual iSCSI devices attached. */
831 u32 dev_count;
832 u32 hba_index;
833 /* Pointer to transport specific host structure. */
834 void *hba_ptr;
835 struct list_head hba_node;
836 spinlock_t device_lock;
837 struct config_group hba_group;
838 struct mutex hba_access_mutex;
839 struct target_backend *backend;
840 };
841
842 struct se_tpg_np {
843 struct se_portal_group *tpg_np_parent;
844 struct config_group tpg_np_group;
845 };
846
847 static inline struct se_tpg_np *to_tpg_np(struct config_item *item)
848 {
849 return container_of(to_config_group(item), struct se_tpg_np,
850 tpg_np_group);
851 }
852
853 struct se_portal_group {
854 /*
855 * PROTOCOL IDENTIFIER value per SPC4, 7.5.1.
856 *
857 * Negative values can be used by fabric drivers for internal use TPGs.
858 */
859 int proto_id;
860 /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
861 atomic_t tpg_pr_ref_count;
862 /* Spinlock for adding/removing ACLed Nodes */
863 struct mutex acl_node_mutex;
864 /* Spinlock for adding/removing sessions */
865 spinlock_t session_lock;
866 struct mutex tpg_lun_mutex;
867 struct list_head se_tpg_node;
868 /* linked list for initiator ACL list */
869 struct list_head acl_node_list;
870 struct hlist_head tpg_lun_hlist;
871 struct se_lun *tpg_virt_lun0;
872 /* List of TCM sessions associated wth this TPG */
873 struct list_head tpg_sess_list;
874 /* Pointer to $FABRIC_MOD dependent code */
875 const struct target_core_fabric_ops *se_tpg_tfo;
876 struct se_wwn *se_tpg_wwn;
877 struct config_group tpg_group;
878 struct config_group tpg_lun_group;
879 struct config_group tpg_np_group;
880 struct config_group tpg_acl_group;
881 struct config_group tpg_attrib_group;
882 struct config_group tpg_auth_group;
883 struct config_group tpg_param_group;
884 };
885
886 static inline struct se_portal_group *to_tpg(struct config_item *item)
887 {
888 return container_of(to_config_group(item), struct se_portal_group,
889 tpg_group);
890 }
891
892 static inline struct se_portal_group *attrib_to_tpg(struct config_item *item)
893 {
894 return container_of(to_config_group(item), struct se_portal_group,
895 tpg_attrib_group);
896 }
897
898 static inline struct se_portal_group *auth_to_tpg(struct config_item *item)
899 {
900 return container_of(to_config_group(item), struct se_portal_group,
901 tpg_auth_group);
902 }
903
904 static inline struct se_portal_group *param_to_tpg(struct config_item *item)
905 {
906 return container_of(to_config_group(item), struct se_portal_group,
907 tpg_param_group);
908 }
909
910 struct se_wwn {
911 struct target_fabric_configfs *wwn_tf;
912 void *priv;
913 struct config_group wwn_group;
914 struct config_group fabric_stat_group;
915 };
916
917 static inline void atomic_inc_mb(atomic_t *v)
918 {
919 smp_mb__before_atomic();
920 atomic_inc(v);
921 smp_mb__after_atomic();
922 }
923
924 static inline void atomic_dec_mb(atomic_t *v)
925 {
926 smp_mb__before_atomic();
927 atomic_dec(v);
928 smp_mb__after_atomic();
929 }
930
931 #endif /* TARGET_CORE_BASE_H */
Linux with added FPC-III support