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Linux 3.17-rc2
[linux/fpc-iii.git] / include / target / target_core_base.h
blob9ec9864ecf38629469ef0823baf153c33fb09472
1 #ifndef TARGET_CORE_BASE_H
2 #define TARGET_CORE_BASE_H
3
4 #include <linux/in.h>
5 #include <linux/configfs.h>
6 #include <linux/dma-mapping.h>
7 #include <linux/blkdev.h>
8 #include <linux/percpu_ida.h>
9 #include <scsi/scsi_cmnd.h>
10 #include <net/sock.h>
11 #include <net/tcp.h>
12
13 #define TARGET_CORE_MOD_VERSION "v4.1.0"
14 #define TARGET_CORE_VERSION TARGET_CORE_MOD_VERSION
15
16 /* Maximum Number of LUNs per Target Portal Group */
17 /* Don't raise above 511 or REPORT_LUNS needs to handle >1 page */
18 #define TRANSPORT_MAX_LUNS_PER_TPG 256
19 /*
20 * By default we use 32-byte CDBs in TCM Core and subsystem plugin code.
21 *
22 * Note that both include/scsi/scsi_cmnd.h:MAX_COMMAND_SIZE and
23 * include/linux/blkdev.h:BLOCK_MAX_CDB as of v2.6.36-rc4 still use
24 * 16-byte CDBs by default and require an extra allocation for
25 * 32-byte CDBs to because of legacy issues.
26 *
27 * Within TCM Core there are no such legacy limitiations, so we go ahead
28 * use 32-byte CDBs by default and use include/scsi/scsi.h:scsi_command_size()
29 * within all TCM Core and subsystem plugin code.
30 */
31 #define TCM_MAX_COMMAND_SIZE 32
32 /*
33 * From include/scsi/scsi_cmnd.h:SCSI_SENSE_BUFFERSIZE, currently
34 * defined 96, but the real limit is 252 (or 260 including the header)
35 */
36 #define TRANSPORT_SENSE_BUFFER SCSI_SENSE_BUFFERSIZE
37 /* Used by transport_send_check_condition_and_sense() */
38 #define SPC_SENSE_KEY_OFFSET 2
39 #define SPC_ADD_SENSE_LEN_OFFSET 7
40 #define SPC_DESC_TYPE_OFFSET 8
41 #define SPC_ADDITIONAL_DESC_LEN_OFFSET 9
42 #define SPC_VALIDITY_OFFSET 10
43 #define SPC_ASC_KEY_OFFSET 12
44 #define SPC_ASCQ_KEY_OFFSET 13
45 #define TRANSPORT_IQN_LEN 224
46 /* Used by target_core_store_alua_lu_gp() and target_core_alua_lu_gp_show_attr_members() */
47 #define LU_GROUP_NAME_BUF 256
48 /* Used by core_alua_store_tg_pt_gp_info() and target_core_alua_tg_pt_gp_show_attr_members() */
49 #define TG_PT_GROUP_NAME_BUF 256
50 /* Used to parse VPD into struct t10_vpd */
51 #define VPD_TMP_BUF_SIZE 254
52 /* Used by transport_generic_cmd_sequencer() */
53 #define READ_BLOCK_LEN 6
54 #define READ_CAP_LEN 8
55 #define READ_POSITION_LEN 20
56 #define INQUIRY_LEN 36
57 /* Used by transport_get_inquiry_vpd_serial() */
58 #define INQUIRY_VPD_SERIAL_LEN 254
59 /* Used by transport_get_inquiry_vpd_device_ident() */
60 #define INQUIRY_VPD_DEVICE_IDENTIFIER_LEN 254
61
62 /* Attempts before moving from SHORT to LONG */
63 #define PYX_TRANSPORT_WINDOW_CLOSED_THRESHOLD 3
64 #define PYX_TRANSPORT_WINDOW_CLOSED_WAIT_SHORT 3 /* In milliseconds */
65 #define PYX_TRANSPORT_WINDOW_CLOSED_WAIT_LONG 10 /* In milliseconds */
66
67 #define PYX_TRANSPORT_STATUS_INTERVAL 5 /* In seconds */
68
69 /* struct se_dev_attrib sanity values */
70 /* Default max_unmap_lba_count */
71 #define DA_MAX_UNMAP_LBA_COUNT 0
72 /* Default max_unmap_block_desc_count */
73 #define DA_MAX_UNMAP_BLOCK_DESC_COUNT 0
74 /* Default unmap_granularity */
75 #define DA_UNMAP_GRANULARITY_DEFAULT 0
76 /* Default unmap_granularity_alignment */
77 #define DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT 0
78 /* Default max_write_same_len, disabled by default */
79 #define DA_MAX_WRITE_SAME_LEN 0
80 /* Default max transfer length */
81 #define DA_FABRIC_MAX_SECTORS 8192
82 /* Use a model alias based on the configfs backend device name */
83 #define DA_EMULATE_MODEL_ALIAS 0
84 /* Emulation for Direct Page Out */
85 #define DA_EMULATE_DPO 0
86 /* Emulation for Forced Unit Access WRITEs */
87 #define DA_EMULATE_FUA_WRITE 1
88 /* Emulation for Forced Unit Access READs */
89 #define DA_EMULATE_FUA_READ 0
90 /* Emulation for WriteCache and SYNCHRONIZE_CACHE */
91 #define DA_EMULATE_WRITE_CACHE 0
92 /* Emulation for UNIT ATTENTION Interlock Control */
93 #define DA_EMULATE_UA_INTLLCK_CTRL 0
94 /* Emulation for TASK_ABORTED status (TAS) by default */
95 #define DA_EMULATE_TAS 1
96 /* Emulation for Thin Provisioning UNMAP using block/blk-lib.c:blkdev_issue_discard() */
97 #define DA_EMULATE_TPU 0
98 /*
99 * Emulation for Thin Provisioning WRITE_SAME w/ UNMAP=1 bit using
100 * block/blk-lib.c:blkdev_issue_discard()
101 */
102 #define DA_EMULATE_TPWS 0
103 /* Emulation for CompareAndWrite (AtomicTestandSet) by default */
104 #define DA_EMULATE_CAW 1
105 /* Emulation for 3rd Party Copy (ExtendedCopy) by default */
106 #define DA_EMULATE_3PC 1
107 /* No Emulation for PSCSI by default */
108 #define DA_EMULATE_ALUA 0
109 /* Enforce SCSI Initiator Port TransportID with 'ISID' for PR */
110 #define DA_ENFORCE_PR_ISIDS 1
111 #define DA_STATUS_MAX_SECTORS_MIN 16
112 #define DA_STATUS_MAX_SECTORS_MAX 8192
113 /* By default don't report non-rotating (solid state) medium */
114 #define DA_IS_NONROT 0
115 /* Queue Algorithm Modifier default for restricted reordering in control mode page */
116 #define DA_EMULATE_REST_REORD 0
117
118 #define SE_INQUIRY_BUF 1024
119 #define SE_MODE_PAGE_BUF 512
120 #define SE_SENSE_BUF 96
121
122 /* struct se_hba->hba_flags */
123 enum hba_flags_table {
124 HBA_FLAGS_INTERNAL_USE = 0x01,
125 HBA_FLAGS_PSCSI_MODE = 0x02,
126 };
127
128 /* struct se_lun->lun_status */
129 enum transport_lun_status_table {
130 TRANSPORT_LUN_STATUS_FREE = 0,
131 TRANSPORT_LUN_STATUS_ACTIVE = 1,
132 };
133
134 /* struct se_portal_group->se_tpg_type */
135 enum transport_tpg_type_table {
136 TRANSPORT_TPG_TYPE_NORMAL = 0,
137 TRANSPORT_TPG_TYPE_DISCOVERY = 1,
138 };
139
140 /* Special transport agnostic struct se_cmd->t_states */
141 enum transport_state_table {
142 TRANSPORT_NO_STATE = 0,
143 TRANSPORT_NEW_CMD = 1,
144 TRANSPORT_WRITE_PENDING = 3,
145 TRANSPORT_PROCESSING = 5,
146 TRANSPORT_COMPLETE = 6,
147 TRANSPORT_ISTATE_PROCESSING = 11,
148 TRANSPORT_COMPLETE_QF_WP = 18,
149 TRANSPORT_COMPLETE_QF_OK = 19,
150 };
151
152 /* Used for struct se_cmd->se_cmd_flags */
153 enum se_cmd_flags_table {
154 SCF_SUPPORTED_SAM_OPCODE = 0x00000001,
155 SCF_TRANSPORT_TASK_SENSE = 0x00000002,
156 SCF_EMULATED_TASK_SENSE = 0x00000004,
157 SCF_SCSI_DATA_CDB = 0x00000008,
158 SCF_SCSI_TMR_CDB = 0x00000010,
159 SCF_FUA = 0x00000080,
160 SCF_SE_LUN_CMD = 0x00000100,
161 SCF_BIDI = 0x00000400,
162 SCF_SENT_CHECK_CONDITION = 0x00000800,
163 SCF_OVERFLOW_BIT = 0x00001000,
164 SCF_UNDERFLOW_BIT = 0x00002000,
165 SCF_SEND_DELAYED_TAS = 0x00004000,
166 SCF_ALUA_NON_OPTIMIZED = 0x00008000,
167 SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC = 0x00020000,
168 SCF_ACK_KREF = 0x00040000,
169 SCF_COMPARE_AND_WRITE = 0x00080000,
170 SCF_COMPARE_AND_WRITE_POST = 0x00100000,
171 SCF_CMD_XCOPY_PASSTHROUGH = 0x00200000,
172 };
173
174 /* struct se_dev_entry->lun_flags and struct se_lun->lun_access */
175 enum transport_lunflags_table {
176 TRANSPORT_LUNFLAGS_NO_ACCESS = 0x00,
177 TRANSPORT_LUNFLAGS_INITIATOR_ACCESS = 0x01,
178 TRANSPORT_LUNFLAGS_READ_ONLY = 0x02,
179 TRANSPORT_LUNFLAGS_READ_WRITE = 0x04,
180 };
181
182 /*
183 * Used by transport_send_check_condition_and_sense()
184 * to signal which ASC/ASCQ sense payload should be built.
185 */
186 typedef unsigned __bitwise__ sense_reason_t;
187
188 enum tcm_sense_reason_table {
189 #define R(x) (__force sense_reason_t )(x)
190 TCM_NO_SENSE = R(0x00),
191 TCM_NON_EXISTENT_LUN = R(0x01),
192 TCM_UNSUPPORTED_SCSI_OPCODE = R(0x02),
193 TCM_INCORRECT_AMOUNT_OF_DATA = R(0x03),
194 TCM_UNEXPECTED_UNSOLICITED_DATA = R(0x04),
195 TCM_SERVICE_CRC_ERROR = R(0x05),
196 TCM_SNACK_REJECTED = R(0x06),
197 TCM_SECTOR_COUNT_TOO_MANY = R(0x07),
198 TCM_INVALID_CDB_FIELD = R(0x08),
199 TCM_INVALID_PARAMETER_LIST = R(0x09),
200 TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE = R(0x0a),
201 TCM_UNKNOWN_MODE_PAGE = R(0x0b),
202 TCM_WRITE_PROTECTED = R(0x0c),
203 TCM_CHECK_CONDITION_ABORT_CMD = R(0x0d),
204 TCM_CHECK_CONDITION_UNIT_ATTENTION = R(0x0e),
205 TCM_CHECK_CONDITION_NOT_READY = R(0x0f),
206 TCM_RESERVATION_CONFLICT = R(0x10),
207 TCM_ADDRESS_OUT_OF_RANGE = R(0x11),
208 TCM_OUT_OF_RESOURCES = R(0x12),
209 TCM_PARAMETER_LIST_LENGTH_ERROR = R(0x13),
210 TCM_MISCOMPARE_VERIFY = R(0x14),
211 TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED = R(0x15),
212 TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED = R(0x16),
213 TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED = R(0x17),
214 #undef R
215 };
216
217 enum target_sc_flags_table {
218 TARGET_SCF_BIDI_OP = 0x01,
219 TARGET_SCF_ACK_KREF = 0x02,
220 TARGET_SCF_UNKNOWN_SIZE = 0x04,
221 };
222
223 /* fabric independent task management function values */
224 enum tcm_tmreq_table {
225 TMR_ABORT_TASK = 1,
226 TMR_ABORT_TASK_SET = 2,
227 TMR_CLEAR_ACA = 3,
228 TMR_CLEAR_TASK_SET = 4,
229 TMR_LUN_RESET = 5,
230 TMR_TARGET_WARM_RESET = 6,
231 TMR_TARGET_COLD_RESET = 7,
232 };
233
234 /* fabric independent task management response values */
235 enum tcm_tmrsp_table {
236 TMR_FUNCTION_FAILED = 0,
237 TMR_FUNCTION_COMPLETE = 1,
238 TMR_TASK_DOES_NOT_EXIST = 2,
239 TMR_LUN_DOES_NOT_EXIST = 3,
240 TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED = 4,
241 TMR_FUNCTION_REJECTED = 5,
242 };
243
244 /*
245 * Used for target SCSI statistics
246 */
247 typedef enum {
248 SCSI_INST_INDEX,
249 SCSI_DEVICE_INDEX,
250 SCSI_AUTH_INTR_INDEX,
251 SCSI_INDEX_TYPE_MAX
252 } scsi_index_t;
253
254 struct se_cmd;
255
256 struct t10_alua_lba_map_member {
257 struct list_head lba_map_mem_list;
258 int lba_map_mem_alua_state;
259 int lba_map_mem_alua_pg_id;
260 };
261
262 struct t10_alua_lba_map {
263 u64 lba_map_first_lba;
264 u64 lba_map_last_lba;
265 struct list_head lba_map_list;
266 struct list_head lba_map_mem_list;
267 };
268
269 struct t10_alua {
270 /* ALUA Target Port Group ID */
271 u16 alua_tg_pt_gps_counter;
272 u32 alua_tg_pt_gps_count;
273 /* Referrals support */
274 spinlock_t lba_map_lock;
275 u32 lba_map_segment_size;
276 u32 lba_map_segment_multiplier;
277 struct list_head lba_map_list;
278 spinlock_t tg_pt_gps_lock;
279 struct se_device *t10_dev;
280 /* Used for default ALUA Target Port Group */
281 struct t10_alua_tg_pt_gp *default_tg_pt_gp;
282 /* Used for default ALUA Target Port Group ConfigFS group */
283 struct config_group alua_tg_pt_gps_group;
284 struct list_head tg_pt_gps_list;
285 };
286
287 struct t10_alua_lu_gp {
288 u16 lu_gp_id;
289 int lu_gp_valid_id;
290 u32 lu_gp_members;
291 atomic_t lu_gp_ref_cnt;
292 spinlock_t lu_gp_lock;
293 struct config_group lu_gp_group;
294 struct list_head lu_gp_node;
295 struct list_head lu_gp_mem_list;
296 };
297
298 struct t10_alua_lu_gp_member {
299 bool lu_gp_assoc;
300 atomic_t lu_gp_mem_ref_cnt;
301 spinlock_t lu_gp_mem_lock;
302 struct t10_alua_lu_gp *lu_gp;
303 struct se_device *lu_gp_mem_dev;
304 struct list_head lu_gp_mem_list;
305 };
306
307 struct t10_alua_tg_pt_gp {
308 u16 tg_pt_gp_id;
309 int tg_pt_gp_valid_id;
310 int tg_pt_gp_alua_supported_states;
311 int tg_pt_gp_alua_pending_state;
312 int tg_pt_gp_alua_previous_state;
313 int tg_pt_gp_alua_access_status;
314 int tg_pt_gp_alua_access_type;
315 int tg_pt_gp_nonop_delay_msecs;
316 int tg_pt_gp_trans_delay_msecs;
317 int tg_pt_gp_implicit_trans_secs;
318 int tg_pt_gp_pref;
319 int tg_pt_gp_write_metadata;
320 u32 tg_pt_gp_members;
321 atomic_t tg_pt_gp_alua_access_state;
322 atomic_t tg_pt_gp_ref_cnt;
323 spinlock_t tg_pt_gp_lock;
324 struct mutex tg_pt_gp_md_mutex;
325 struct se_device *tg_pt_gp_dev;
326 struct config_group tg_pt_gp_group;
327 struct list_head tg_pt_gp_list;
328 struct list_head tg_pt_gp_mem_list;
329 struct se_port *tg_pt_gp_alua_port;
330 struct se_node_acl *tg_pt_gp_alua_nacl;
331 struct delayed_work tg_pt_gp_transition_work;
332 struct completion *tg_pt_gp_transition_complete;
333 };
334
335 struct t10_alua_tg_pt_gp_member {
336 bool tg_pt_gp_assoc;
337 atomic_t tg_pt_gp_mem_ref_cnt;
338 spinlock_t tg_pt_gp_mem_lock;
339 struct t10_alua_tg_pt_gp *tg_pt_gp;
340 struct se_port *tg_pt;
341 struct list_head tg_pt_gp_mem_list;
342 };
343
344 struct t10_vpd {
345 unsigned char device_identifier[INQUIRY_VPD_DEVICE_IDENTIFIER_LEN];
346 int protocol_identifier_set;
347 u32 protocol_identifier;
348 u32 device_identifier_code_set;
349 u32 association;
350 u32 device_identifier_type;
351 struct list_head vpd_list;
352 };
353
354 struct t10_wwn {
355 char vendor[8];
356 char model[16];
357 char revision[4];
358 char unit_serial[INQUIRY_VPD_SERIAL_LEN];
359 spinlock_t t10_vpd_lock;
360 struct se_device *t10_dev;
361 struct config_group t10_wwn_group;
362 struct list_head t10_vpd_list;
363 };
364
365 struct t10_pr_registration {
366 /* Used for fabrics that contain WWN+ISID */
367 #define PR_REG_ISID_LEN 16
368 /* PR_REG_ISID_LEN + ',i,0x' */
369 #define PR_REG_ISID_ID_LEN (PR_REG_ISID_LEN + 5)
370 char pr_reg_isid[PR_REG_ISID_LEN];
371 /* Used during APTPL metadata reading */
372 #define PR_APTPL_MAX_IPORT_LEN 256
373 unsigned char pr_iport[PR_APTPL_MAX_IPORT_LEN];
374 /* Used during APTPL metadata reading */
375 #define PR_APTPL_MAX_TPORT_LEN 256
376 unsigned char pr_tport[PR_APTPL_MAX_TPORT_LEN];
377 u16 pr_aptpl_rpti;
378 u16 pr_reg_tpgt;
379 /* Reservation effects all target ports */
380 int pr_reg_all_tg_pt;
381 /* Activate Persistence across Target Power Loss */
382 int pr_reg_aptpl;
383 int pr_res_holder;
384 int pr_res_type;
385 int pr_res_scope;
386 /* Used for fabric initiator WWPNs using a ISID */
387 bool isid_present_at_reg;
388 u32 pr_res_mapped_lun;
389 u32 pr_aptpl_target_lun;
390 u32 pr_res_generation;
391 u64 pr_reg_bin_isid;
392 u64 pr_res_key;
393 atomic_t pr_res_holders;
394 struct se_node_acl *pr_reg_nacl;
395 struct se_dev_entry *pr_reg_deve;
396 struct se_lun *pr_reg_tg_pt_lun;
397 struct list_head pr_reg_list;
398 struct list_head pr_reg_abort_list;
399 struct list_head pr_reg_aptpl_list;
400 struct list_head pr_reg_atp_list;
401 struct list_head pr_reg_atp_mem_list;
402 };
403
404 struct t10_reservation {
405 /* Reservation effects all target ports */
406 int pr_all_tg_pt;
407 /* Activate Persistence across Target Power Loss enabled
408 * for SCSI device */
409 int pr_aptpl_active;
410 #define PR_APTPL_BUF_LEN 8192
411 u32 pr_generation;
412 spinlock_t registration_lock;
413 spinlock_t aptpl_reg_lock;
414 /*
415 * This will always be set by one individual I_T Nexus.
416 * However with all_tg_pt=1, other I_T Nexus from the
417 * same initiator can access PR reg/res info on a different
418 * target port.
419 *
420 * There is also the 'All Registrants' case, where there is
421 * a single *pr_res_holder of the reservation, but all
422 * registrations are considered reservation holders.
423 */
424 struct se_node_acl *pr_res_holder;
425 struct list_head registration_list;
426 struct list_head aptpl_reg_list;
427 };
428
429 struct se_tmr_req {
430 /* Task Management function to be performed */
431 u8 function;
432 /* Task Management response to send */
433 u8 response;
434 int call_transport;
435 /* Reference to ITT that Task Mgmt should be performed */
436 u32 ref_task_tag;
437 void *fabric_tmr_ptr;
438 struct se_cmd *task_cmd;
439 struct se_device *tmr_dev;
440 struct se_lun *tmr_lun;
441 struct list_head tmr_list;
442 };
443
444 enum target_prot_op {
445 TARGET_PROT_NORMAL = 0,
446 TARGET_PROT_DIN_INSERT = (1 << 0),
447 TARGET_PROT_DOUT_INSERT = (1 << 1),
448 TARGET_PROT_DIN_STRIP = (1 << 2),
449 TARGET_PROT_DOUT_STRIP = (1 << 3),
450 TARGET_PROT_DIN_PASS = (1 << 4),
451 TARGET_PROT_DOUT_PASS = (1 << 5),
452 };
453
454 #define TARGET_PROT_ALL TARGET_PROT_DIN_INSERT | TARGET_PROT_DOUT_INSERT | \
455 TARGET_PROT_DIN_STRIP | TARGET_PROT_DOUT_STRIP | \
456 TARGET_PROT_DIN_PASS | TARGET_PROT_DOUT_PASS
457
458 enum target_prot_type {
459 TARGET_DIF_TYPE0_PROT,
460 TARGET_DIF_TYPE1_PROT,
461 TARGET_DIF_TYPE2_PROT,
462 TARGET_DIF_TYPE3_PROT,
463 };
464
465 enum target_core_dif_check {
466 TARGET_DIF_CHECK_GUARD = 0x1 << 0,
467 TARGET_DIF_CHECK_APPTAG = 0x1 << 1,
468 TARGET_DIF_CHECK_REFTAG = 0x1 << 2,
469 };
470
471 struct se_dif_v1_tuple {
472 __be16 guard_tag;
473 __be16 app_tag;
474 __be32 ref_tag;
475 };
476
477 struct se_cmd {
478 /* SAM response code being sent to initiator */
479 u8 scsi_status;
480 u8 scsi_asc;
481 u8 scsi_ascq;
482 u16 scsi_sense_length;
483 /* Delay for ALUA Active/NonOptimized state access in milliseconds */
484 int alua_nonop_delay;
485 /* See include/linux/dma-mapping.h */
486 enum dma_data_direction data_direction;
487 /* For SAM Task Attribute */
488 int sam_task_attr;
489 /* Used for se_sess->sess_tag_pool */
490 unsigned int map_tag;
491 /* Transport protocol dependent state, see transport_state_table */
492 enum transport_state_table t_state;
493 unsigned cmd_wait_set:1;
494 unsigned unknown_data_length:1;
495 /* See se_cmd_flags_table */
496 u32 se_cmd_flags;
497 u32 se_ordered_id;
498 /* Total size in bytes associated with command */
499 u32 data_length;
500 u32 residual_count;
501 u32 orig_fe_lun;
502 /* Persistent Reservation key */
503 u64 pr_res_key;
504 /* Used for sense data */
505 void *sense_buffer;
506 struct list_head se_delayed_node;
507 struct list_head se_qf_node;
508 struct se_device *se_dev;
509 struct se_dev_entry *se_deve;
510 struct se_lun *se_lun;
511 /* Only used for internal passthrough and legacy TCM fabric modules */
512 struct se_session *se_sess;
513 struct se_tmr_req *se_tmr_req;
514 struct list_head se_cmd_list;
515 struct completion cmd_wait_comp;
516 struct kref cmd_kref;
517 struct target_core_fabric_ops *se_tfo;
518 sense_reason_t (*execute_cmd)(struct se_cmd *);
519 sense_reason_t (*execute_rw)(struct se_cmd *, struct scatterlist *,
520 u32, enum dma_data_direction);
521 sense_reason_t (*transport_complete_callback)(struct se_cmd *);
522
523 unsigned char *t_task_cdb;
524 unsigned char __t_task_cdb[TCM_MAX_COMMAND_SIZE];
525 unsigned long long t_task_lba;
526 unsigned int t_task_nolb;
527 unsigned int transport_state;
528 #define CMD_T_ABORTED (1 << 0)
529 #define CMD_T_ACTIVE (1 << 1)
530 #define CMD_T_COMPLETE (1 << 2)
531 #define CMD_T_SENT (1 << 4)
532 #define CMD_T_STOP (1 << 5)
533 #define CMD_T_DEV_ACTIVE (1 << 7)
534 #define CMD_T_REQUEST_STOP (1 << 8)
535 #define CMD_T_BUSY (1 << 9)
536 spinlock_t t_state_lock;
537 struct completion t_transport_stop_comp;
538
539 struct work_struct work;
540
541 struct scatterlist *t_data_sg;
542 struct scatterlist *t_data_sg_orig;
543 unsigned int t_data_nents;
544 unsigned int t_data_nents_orig;
545 void *t_data_vmap;
546 struct scatterlist *t_bidi_data_sg;
547 unsigned int t_bidi_data_nents;
548
549 struct list_head state_list;
550 bool state_active;
551
552 /* old task stop completion, consider merging with some of the above */
553 struct completion task_stop_comp;
554
555 /* backend private data */
556 void *priv;
557
558 /* Used for lun->lun_ref counting */
559 int lun_ref_active;
560
561 /* DIF related members */
562 enum target_prot_op prot_op;
563 enum target_prot_type prot_type;
564 u8 prot_checks;
565 u32 prot_length;
566 u32 reftag_seed;
567 struct scatterlist *t_prot_sg;
568 unsigned int t_prot_nents;
569 sense_reason_t pi_err;
570 sector_t bad_sector;
571 bool prot_pto;
572 };
573
574 struct se_ua {
575 u8 ua_asc;
576 u8 ua_ascq;
577 struct se_node_acl *ua_nacl;
578 struct list_head ua_nacl_list;
579 };
580
581 struct se_node_acl {
582 char initiatorname[TRANSPORT_IQN_LEN];
583 /* Used to signal demo mode created ACL, disabled by default */
584 bool dynamic_node_acl;
585 bool acl_stop:1;
586 u32 queue_depth;
587 u32 acl_index;
588 #define MAX_ACL_TAG_SIZE 64
589 char acl_tag[MAX_ACL_TAG_SIZE];
590 /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
591 atomic_t acl_pr_ref_count;
592 struct se_dev_entry **device_list;
593 struct se_session *nacl_sess;
594 struct se_portal_group *se_tpg;
595 spinlock_t device_list_lock;
596 spinlock_t nacl_sess_lock;
597 struct config_group acl_group;
598 struct config_group acl_attrib_group;
599 struct config_group acl_auth_group;
600 struct config_group acl_param_group;
601 struct config_group acl_fabric_stat_group;
602 struct config_group *acl_default_groups[5];
603 struct list_head acl_list;
604 struct list_head acl_sess_list;
605 struct completion acl_free_comp;
606 struct kref acl_kref;
607 };
608
609 struct se_session {
610 unsigned sess_tearing_down:1;
611 u64 sess_bin_isid;
612 enum target_prot_op sup_prot_ops;
613 struct se_node_acl *se_node_acl;
614 struct se_portal_group *se_tpg;
615 void *fabric_sess_ptr;
616 struct list_head sess_list;
617 struct list_head sess_acl_list;
618 struct list_head sess_cmd_list;
619 struct list_head sess_wait_list;
620 spinlock_t sess_cmd_lock;
621 struct kref sess_kref;
622 void *sess_cmd_map;
623 struct percpu_ida sess_tag_pool;
624 };
625
626 struct se_device;
627 struct se_transform_info;
628 struct scatterlist;
629
630 struct se_ml_stat_grps {
631 struct config_group stat_group;
632 struct config_group scsi_auth_intr_group;
633 struct config_group scsi_att_intr_port_group;
634 };
635
636 struct se_lun_acl {
637 char initiatorname[TRANSPORT_IQN_LEN];
638 u32 mapped_lun;
639 struct se_node_acl *se_lun_nacl;
640 struct se_lun *se_lun;
641 struct list_head lacl_list;
642 struct config_group se_lun_group;
643 struct se_ml_stat_grps ml_stat_grps;
644 };
645
646 struct se_dev_entry {
647 bool def_pr_registered;
648 /* See transport_lunflags_table */
649 u32 lun_flags;
650 u32 mapped_lun;
651 u32 total_cmds;
652 u64 pr_res_key;
653 u64 creation_time;
654 u32 attach_count;
655 u64 read_bytes;
656 u64 write_bytes;
657 atomic_t ua_count;
658 /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
659 atomic_t pr_ref_count;
660 struct se_lun_acl *se_lun_acl;
661 spinlock_t ua_lock;
662 struct se_lun *se_lun;
663 struct list_head alua_port_list;
664 struct list_head ua_list;
665 };
666
667 struct se_dev_attrib {
668 int emulate_model_alias;
669 int emulate_dpo;
670 int emulate_fua_write;
671 int emulate_fua_read;
672 int emulate_write_cache;
673 int emulate_ua_intlck_ctrl;
674 int emulate_tas;
675 int emulate_tpu;
676 int emulate_tpws;
677 int emulate_caw;
678 int emulate_3pc;
679 int pi_prot_format;
680 enum target_prot_type pi_prot_type;
681 enum target_prot_type hw_pi_prot_type;
682 int enforce_pr_isids;
683 int is_nonrot;
684 int emulate_rest_reord;
685 u32 hw_block_size;
686 u32 block_size;
687 u32 hw_max_sectors;
688 u32 fabric_max_sectors;
689 u32 optimal_sectors;
690 u32 hw_queue_depth;
691 u32 queue_depth;
692 u32 max_unmap_lba_count;
693 u32 max_unmap_block_desc_count;
694 u32 unmap_granularity;
695 u32 unmap_granularity_alignment;
696 u32 max_write_same_len;
697 u32 max_bytes_per_io;
698 struct se_device *da_dev;
699 struct config_group da_group;
700 };
701
702 struct se_port_stat_grps {
703 struct config_group stat_group;
704 struct config_group scsi_port_group;
705 struct config_group scsi_tgt_port_group;
706 struct config_group scsi_transport_group;
707 };
708
709 struct se_lun {
710 #define SE_LUN_LINK_MAGIC 0xffff7771
711 u32 lun_link_magic;
712 /* See transport_lun_status_table */
713 enum transport_lun_status_table lun_status;
714 u32 lun_access;
715 u32 lun_flags;
716 u32 unpacked_lun;
717 atomic_t lun_acl_count;
718 spinlock_t lun_acl_lock;
719 spinlock_t lun_sep_lock;
720 struct completion lun_shutdown_comp;
721 struct list_head lun_acl_list;
722 struct se_device *lun_se_dev;
723 struct se_port *lun_sep;
724 struct config_group lun_group;
725 struct se_port_stat_grps port_stat_grps;
726 struct completion lun_ref_comp;
727 struct percpu_ref lun_ref;
728 };
729
730 struct se_dev_stat_grps {
731 struct config_group stat_group;
732 struct config_group scsi_dev_group;
733 struct config_group scsi_tgt_dev_group;
734 struct config_group scsi_lu_group;
735 };
736
737 struct se_device {
738 #define SE_DEV_LINK_MAGIC 0xfeeddeef
739 u32 dev_link_magic;
740 /* RELATIVE TARGET PORT IDENTIFER Counter */
741 u16 dev_rpti_counter;
742 /* Used for SAM Task Attribute ordering */
743 u32 dev_cur_ordered_id;
744 u32 dev_flags;
745 #define DF_CONFIGURED 0x00000001
746 #define DF_FIRMWARE_VPD_UNIT_SERIAL 0x00000002
747 #define DF_EMULATED_VPD_UNIT_SERIAL 0x00000004
748 #define DF_USING_UDEV_PATH 0x00000008
749 #define DF_USING_ALIAS 0x00000010
750 u32 dev_port_count;
751 /* Physical device queue depth */
752 u32 queue_depth;
753 /* Used for SPC-2 reservations enforce of ISIDs */
754 u64 dev_res_bin_isid;
755 /* Pointer to transport specific device structure */
756 u32 dev_index;
757 u64 creation_time;
758 atomic_long_t num_resets;
759 atomic_long_t num_cmds;
760 atomic_long_t read_bytes;
761 atomic_long_t write_bytes;
762 /* Active commands on this virtual SE device */
763 atomic_t simple_cmds;
764 atomic_t dev_ordered_id;
765 atomic_t dev_ordered_sync;
766 atomic_t dev_qf_count;
767 int export_count;
768 spinlock_t delayed_cmd_lock;
769 spinlock_t execute_task_lock;
770 spinlock_t dev_reservation_lock;
771 unsigned int dev_reservation_flags;
772 #define DRF_SPC2_RESERVATIONS 0x00000001
773 #define DRF_SPC2_RESERVATIONS_WITH_ISID 0x00000002
774 spinlock_t se_port_lock;
775 spinlock_t se_tmr_lock;
776 spinlock_t qf_cmd_lock;
777 struct semaphore caw_sem;
778 /* Used for legacy SPC-2 reservationsa */
779 struct se_node_acl *dev_reserved_node_acl;
780 /* Used for ALUA Logical Unit Group membership */
781 struct t10_alua_lu_gp_member *dev_alua_lu_gp_mem;
782 /* Used for SPC-3 Persistent Reservations */
783 struct t10_pr_registration *dev_pr_res_holder;
784 struct list_head dev_sep_list;
785 struct list_head dev_tmr_list;
786 struct workqueue_struct *tmr_wq;
787 struct work_struct qf_work_queue;
788 struct list_head delayed_cmd_list;
789 struct list_head state_list;
790 struct list_head qf_cmd_list;
791 struct list_head g_dev_node;
792 /* Pointer to associated SE HBA */
793 struct se_hba *se_hba;
794 /* T10 Inquiry and VPD WWN Information */
795 struct t10_wwn t10_wwn;
796 /* T10 Asymmetric Logical Unit Assignment for Target Ports */
797 struct t10_alua t10_alua;
798 /* T10 SPC-2 + SPC-3 Reservations */
799 struct t10_reservation t10_pr;
800 struct se_dev_attrib dev_attrib;
801 struct config_group dev_group;
802 struct config_group dev_pr_group;
803 struct se_dev_stat_grps dev_stat_grps;
804 #define SE_DEV_ALIAS_LEN 512 /* must be less than PAGE_SIZE */
805 unsigned char dev_alias[SE_DEV_ALIAS_LEN];
806 #define SE_UDEV_PATH_LEN 512 /* must be less than PAGE_SIZE */
807 unsigned char udev_path[SE_UDEV_PATH_LEN];
808 /* Pointer to template of function pointers for transport */
809 struct se_subsystem_api *transport;
810 /* Linked list for struct se_hba struct se_device list */
811 struct list_head dev_list;
812 struct se_lun xcopy_lun;
813 /* Protection Information */
814 int prot_length;
815 };
816
817 struct se_hba {
818 u16 hba_tpgt;
819 u32 hba_id;
820 /* See hba_flags_table */
821 u32 hba_flags;
822 /* Virtual iSCSI devices attached. */
823 u32 dev_count;
824 u32 hba_index;
825 /* Pointer to transport specific host structure. */
826 void *hba_ptr;
827 struct list_head hba_node;
828 spinlock_t device_lock;
829 struct config_group hba_group;
830 struct mutex hba_access_mutex;
831 struct se_subsystem_api *transport;
832 };
833
834 struct scsi_port_stats {
835 u64 cmd_pdus;
836 u64 tx_data_octets;
837 u64 rx_data_octets;
838 };
839
840 struct se_port {
841 /* RELATIVE TARGET PORT IDENTIFER */
842 u16 sep_rtpi;
843 int sep_tg_pt_secondary_stat;
844 int sep_tg_pt_secondary_write_md;
845 u32 sep_index;
846 struct scsi_port_stats sep_stats;
847 /* Used for ALUA Target Port Groups membership */
848 atomic_t sep_tg_pt_secondary_offline;
849 /* Used for PR ALL_TG_PT=1 */
850 atomic_t sep_tg_pt_ref_cnt;
851 spinlock_t sep_alua_lock;
852 struct mutex sep_tg_pt_md_mutex;
853 struct t10_alua_tg_pt_gp_member *sep_alua_tg_pt_gp_mem;
854 struct se_lun *sep_lun;
855 struct se_portal_group *sep_tpg;
856 struct list_head sep_alua_list;
857 struct list_head sep_list;
858 };
859
860 struct se_tpg_np {
861 struct se_portal_group *tpg_np_parent;
862 struct config_group tpg_np_group;
863 };
864
865 struct se_portal_group {
866 /* Type of target portal group, see transport_tpg_type_table */
867 enum transport_tpg_type_table se_tpg_type;
868 /* Number of ACLed Initiator Nodes for this TPG */
869 u32 num_node_acls;
870 /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
871 atomic_t tpg_pr_ref_count;
872 /* Spinlock for adding/removing ACLed Nodes */
873 spinlock_t acl_node_lock;
874 /* Spinlock for adding/removing sessions */
875 spinlock_t session_lock;
876 spinlock_t tpg_lun_lock;
877 /* Pointer to $FABRIC_MOD portal group */
878 void *se_tpg_fabric_ptr;
879 struct list_head se_tpg_node;
880 /* linked list for initiator ACL list */
881 struct list_head acl_node_list;
882 struct se_lun **tpg_lun_list;
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 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_default_groups[7];
891 struct config_group tpg_lun_group;
892 struct config_group tpg_np_group;
893 struct config_group tpg_acl_group;
894 struct config_group tpg_attrib_group;
895 struct config_group tpg_auth_group;
896 struct config_group tpg_param_group;
897 };
898
899 struct se_wwn {
900 struct target_fabric_configfs *wwn_tf;
901 struct config_group wwn_group;
902 struct config_group *wwn_default_groups[2];
903 struct config_group fabric_stat_group;
904 };
905
906 #endif /* TARGET_CORE_BASE_H */
Linux with added FPC-III support