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Linux 4.1.18
[linux/fpc-iii.git] / include / target / target_core_base.h
blob480e9f82dfea861a70fa5e1df45076770c719f2e
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 /* Use a model alias based on the configfs backend device name */
81 #define DA_EMULATE_MODEL_ALIAS 0
82 /* Emulation for Direct Page Out */
83 #define DA_EMULATE_DPO 0
84 /* Emulation for Forced Unit Access WRITEs */
85 #define DA_EMULATE_FUA_WRITE 1
86 /* Emulation for Forced Unit Access READs */
87 #define DA_EMULATE_FUA_READ 0
88 /* Emulation for WriteCache and SYNCHRONIZE_CACHE */
89 #define DA_EMULATE_WRITE_CACHE 0
90 /* Emulation for UNIT ATTENTION Interlock Control */
91 #define DA_EMULATE_UA_INTLLCK_CTRL 0
92 /* Emulation for TASK_ABORTED status (TAS) by default */
93 #define DA_EMULATE_TAS 1
94 /* Emulation for Thin Provisioning UNMAP using block/blk-lib.c:blkdev_issue_discard() */
95 #define DA_EMULATE_TPU 0
96 /*
97 * Emulation for Thin Provisioning WRITE_SAME w/ UNMAP=1 bit using
98 * block/blk-lib.c:blkdev_issue_discard()
99 */
100 #define DA_EMULATE_TPWS 0
101 /* Emulation for CompareAndWrite (AtomicTestandSet) by default */
102 #define DA_EMULATE_CAW 1
103 /* Emulation for 3rd Party Copy (ExtendedCopy) by default */
104 #define DA_EMULATE_3PC 1
105 /* No Emulation for PSCSI by default */
106 #define DA_EMULATE_ALUA 0
107 /* Enforce SCSI Initiator Port TransportID with 'ISID' for PR */
108 #define DA_ENFORCE_PR_ISIDS 1
109 /* Force SPC-3 PR Activate Persistence across Target Power Loss */
110 #define DA_FORCE_PR_APTPL 0
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_COMPARE_AND_WRITE = 0x00080000,
169 SCF_COMPARE_AND_WRITE_POST = 0x00100000,
170 };
171
172 /* struct se_dev_entry->lun_flags and struct se_lun->lun_access */
173 enum transport_lunflags_table {
174 TRANSPORT_LUNFLAGS_NO_ACCESS = 0x00,
175 TRANSPORT_LUNFLAGS_INITIATOR_ACCESS = 0x01,
176 TRANSPORT_LUNFLAGS_READ_ONLY = 0x02,
177 TRANSPORT_LUNFLAGS_READ_WRITE = 0x04,
178 };
179
180 /*
181 * Used by transport_send_check_condition_and_sense()
182 * to signal which ASC/ASCQ sense payload should be built.
183 */
184 typedef unsigned __bitwise__ sense_reason_t;
185
186 enum tcm_sense_reason_table {
187 #define R(x) (__force sense_reason_t )(x)
188 TCM_NO_SENSE = R(0x00),
189 TCM_NON_EXISTENT_LUN = R(0x01),
190 TCM_UNSUPPORTED_SCSI_OPCODE = R(0x02),
191 TCM_INCORRECT_AMOUNT_OF_DATA = R(0x03),
192 TCM_UNEXPECTED_UNSOLICITED_DATA = R(0x04),
193 TCM_SERVICE_CRC_ERROR = R(0x05),
194 TCM_SNACK_REJECTED = R(0x06),
195 TCM_SECTOR_COUNT_TOO_MANY = R(0x07),
196 TCM_INVALID_CDB_FIELD = R(0x08),
197 TCM_INVALID_PARAMETER_LIST = R(0x09),
198 TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE = R(0x0a),
199 TCM_UNKNOWN_MODE_PAGE = R(0x0b),
200 TCM_WRITE_PROTECTED = R(0x0c),
201 TCM_CHECK_CONDITION_ABORT_CMD = R(0x0d),
202 TCM_CHECK_CONDITION_UNIT_ATTENTION = R(0x0e),
203 TCM_CHECK_CONDITION_NOT_READY = R(0x0f),
204 TCM_RESERVATION_CONFLICT = R(0x10),
205 TCM_ADDRESS_OUT_OF_RANGE = R(0x11),
206 TCM_OUT_OF_RESOURCES = R(0x12),
207 TCM_PARAMETER_LIST_LENGTH_ERROR = R(0x13),
208 TCM_MISCOMPARE_VERIFY = R(0x14),
209 TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED = R(0x15),
210 TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED = R(0x16),
211 TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED = R(0x17),
212 #undef R
213 };
214
215 enum target_sc_flags_table {
216 TARGET_SCF_BIDI_OP = 0x01,
217 TARGET_SCF_ACK_KREF = 0x02,
218 TARGET_SCF_UNKNOWN_SIZE = 0x04,
219 };
220
221 /* fabric independent task management function values */
222 enum tcm_tmreq_table {
223 TMR_ABORT_TASK = 1,
224 TMR_ABORT_TASK_SET = 2,
225 TMR_CLEAR_ACA = 3,
226 TMR_CLEAR_TASK_SET = 4,
227 TMR_LUN_RESET = 5,
228 TMR_TARGET_WARM_RESET = 6,
229 TMR_TARGET_COLD_RESET = 7,
230 };
231
232 /* fabric independent task management response values */
233 enum tcm_tmrsp_table {
234 TMR_FUNCTION_FAILED = 0,
235 TMR_FUNCTION_COMPLETE = 1,
236 TMR_TASK_DOES_NOT_EXIST = 2,
237 TMR_LUN_DOES_NOT_EXIST = 3,
238 TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED = 4,
239 TMR_FUNCTION_REJECTED = 5,
240 };
241
242 /*
243 * Used for target SCSI statistics
244 */
245 typedef enum {
246 SCSI_INST_INDEX,
247 SCSI_DEVICE_INDEX,
248 SCSI_AUTH_INTR_INDEX,
249 SCSI_INDEX_TYPE_MAX
250 } scsi_index_t;
251
252 struct se_cmd;
253
254 struct t10_alua_lba_map_member {
255 struct list_head lba_map_mem_list;
256 int lba_map_mem_alua_state;
257 int lba_map_mem_alua_pg_id;
258 };
259
260 struct t10_alua_lba_map {
261 u64 lba_map_first_lba;
262 u64 lba_map_last_lba;
263 struct list_head lba_map_list;
264 struct list_head lba_map_mem_list;
265 };
266
267 struct t10_alua {
268 /* ALUA Target Port Group ID */
269 u16 alua_tg_pt_gps_counter;
270 u32 alua_tg_pt_gps_count;
271 /* Referrals support */
272 spinlock_t lba_map_lock;
273 u32 lba_map_segment_size;
274 u32 lba_map_segment_multiplier;
275 struct list_head lba_map_list;
276 spinlock_t tg_pt_gps_lock;
277 struct se_device *t10_dev;
278 /* Used for default ALUA Target Port Group */
279 struct t10_alua_tg_pt_gp *default_tg_pt_gp;
280 /* Used for default ALUA Target Port Group ConfigFS group */
281 struct config_group alua_tg_pt_gps_group;
282 struct list_head tg_pt_gps_list;
283 };
284
285 struct t10_alua_lu_gp {
286 u16 lu_gp_id;
287 int lu_gp_valid_id;
288 u32 lu_gp_members;
289 atomic_t lu_gp_ref_cnt;
290 spinlock_t lu_gp_lock;
291 struct config_group lu_gp_group;
292 struct list_head lu_gp_node;
293 struct list_head lu_gp_mem_list;
294 };
295
296 struct t10_alua_lu_gp_member {
297 bool lu_gp_assoc;
298 atomic_t lu_gp_mem_ref_cnt;
299 spinlock_t lu_gp_mem_lock;
300 struct t10_alua_lu_gp *lu_gp;
301 struct se_device *lu_gp_mem_dev;
302 struct list_head lu_gp_mem_list;
303 };
304
305 struct t10_alua_tg_pt_gp {
306 u16 tg_pt_gp_id;
307 int tg_pt_gp_valid_id;
308 int tg_pt_gp_alua_supported_states;
309 int tg_pt_gp_alua_pending_state;
310 int tg_pt_gp_alua_previous_state;
311 int tg_pt_gp_alua_access_status;
312 int tg_pt_gp_alua_access_type;
313 int tg_pt_gp_nonop_delay_msecs;
314 int tg_pt_gp_trans_delay_msecs;
315 int tg_pt_gp_implicit_trans_secs;
316 int tg_pt_gp_pref;
317 int tg_pt_gp_write_metadata;
318 u32 tg_pt_gp_members;
319 atomic_t tg_pt_gp_alua_access_state;
320 atomic_t tg_pt_gp_ref_cnt;
321 spinlock_t tg_pt_gp_lock;
322 struct mutex tg_pt_gp_md_mutex;
323 struct se_device *tg_pt_gp_dev;
324 struct config_group tg_pt_gp_group;
325 struct list_head tg_pt_gp_list;
326 struct list_head tg_pt_gp_mem_list;
327 struct se_port *tg_pt_gp_alua_port;
328 struct se_node_acl *tg_pt_gp_alua_nacl;
329 struct delayed_work tg_pt_gp_transition_work;
330 struct completion *tg_pt_gp_transition_complete;
331 };
332
333 struct t10_alua_tg_pt_gp_member {
334 bool tg_pt_gp_assoc;
335 atomic_t tg_pt_gp_mem_ref_cnt;
336 spinlock_t tg_pt_gp_mem_lock;
337 struct t10_alua_tg_pt_gp *tg_pt_gp;
338 struct se_port *tg_pt;
339 struct list_head tg_pt_gp_mem_list;
340 };
341
342 struct t10_vpd {
343 unsigned char device_identifier[INQUIRY_VPD_DEVICE_IDENTIFIER_LEN];
344 int protocol_identifier_set;
345 u32 protocol_identifier;
346 u32 device_identifier_code_set;
347 u32 association;
348 u32 device_identifier_type;
349 struct list_head vpd_list;
350 };
351
352 struct t10_wwn {
353 char vendor[8];
354 char model[16];
355 char revision[4];
356 char unit_serial[INQUIRY_VPD_SERIAL_LEN];
357 spinlock_t t10_vpd_lock;
358 struct se_device *t10_dev;
359 struct config_group t10_wwn_group;
360 struct list_head t10_vpd_list;
361 };
362
363 struct t10_pr_registration {
364 /* Used for fabrics that contain WWN+ISID */
365 #define PR_REG_ISID_LEN 16
366 /* PR_REG_ISID_LEN + ',i,0x' */
367 #define PR_REG_ISID_ID_LEN (PR_REG_ISID_LEN + 5)
368 char pr_reg_isid[PR_REG_ISID_LEN];
369 /* Used during APTPL metadata reading */
370 #define PR_APTPL_MAX_IPORT_LEN 256
371 unsigned char pr_iport[PR_APTPL_MAX_IPORT_LEN];
372 /* Used during APTPL metadata reading */
373 #define PR_APTPL_MAX_TPORT_LEN 256
374 unsigned char pr_tport[PR_APTPL_MAX_TPORT_LEN];
375 u16 pr_aptpl_rpti;
376 u16 pr_reg_tpgt;
377 /* Reservation effects all target ports */
378 int pr_reg_all_tg_pt;
379 /* Activate Persistence across Target Power Loss */
380 int pr_reg_aptpl;
381 int pr_res_holder;
382 int pr_res_type;
383 int pr_res_scope;
384 /* Used for fabric initiator WWPNs using a ISID */
385 bool isid_present_at_reg;
386 u32 pr_res_mapped_lun;
387 u32 pr_aptpl_target_lun;
388 u32 pr_res_generation;
389 u64 pr_reg_bin_isid;
390 u64 pr_res_key;
391 atomic_t pr_res_holders;
392 struct se_node_acl *pr_reg_nacl;
393 struct se_dev_entry *pr_reg_deve;
394 struct se_lun *pr_reg_tg_pt_lun;
395 struct list_head pr_reg_list;
396 struct list_head pr_reg_abort_list;
397 struct list_head pr_reg_aptpl_list;
398 struct list_head pr_reg_atp_list;
399 struct list_head pr_reg_atp_mem_list;
400 };
401
402 struct t10_reservation {
403 /* Reservation effects all target ports */
404 int pr_all_tg_pt;
405 /* Activate Persistence across Target Power Loss enabled
406 * for SCSI device */
407 int pr_aptpl_active;
408 #define PR_APTPL_BUF_LEN 262144
409 u32 pr_generation;
410 spinlock_t registration_lock;
411 spinlock_t aptpl_reg_lock;
412 /*
413 * This will always be set by one individual I_T Nexus.
414 * However with all_tg_pt=1, other I_T Nexus from the
415 * same initiator can access PR reg/res info on a different
416 * target port.
417 *
418 * There is also the 'All Registrants' case, where there is
419 * a single *pr_res_holder of the reservation, but all
420 * registrations are considered reservation holders.
421 */
422 struct se_node_acl *pr_res_holder;
423 struct list_head registration_list;
424 struct list_head aptpl_reg_list;
425 };
426
427 struct se_tmr_req {
428 /* Task Management function to be performed */
429 u8 function;
430 /* Task Management response to send */
431 u8 response;
432 int call_transport;
433 /* Reference to ITT that Task Mgmt should be performed */
434 u32 ref_task_tag;
435 void *fabric_tmr_ptr;
436 struct se_cmd *task_cmd;
437 struct se_device *tmr_dev;
438 struct se_lun *tmr_lun;
439 struct list_head tmr_list;
440 };
441
442 enum target_prot_op {
443 TARGET_PROT_NORMAL = 0,
444 TARGET_PROT_DIN_INSERT = (1 << 0),
445 TARGET_PROT_DOUT_INSERT = (1 << 1),
446 TARGET_PROT_DIN_STRIP = (1 << 2),
447 TARGET_PROT_DOUT_STRIP = (1 << 3),
448 TARGET_PROT_DIN_PASS = (1 << 4),
449 TARGET_PROT_DOUT_PASS = (1 << 5),
450 };
451
452 #define TARGET_PROT_ALL TARGET_PROT_DIN_INSERT | TARGET_PROT_DOUT_INSERT | \
453 TARGET_PROT_DIN_STRIP | TARGET_PROT_DOUT_STRIP | \
454 TARGET_PROT_DIN_PASS | TARGET_PROT_DOUT_PASS
455
456 enum target_prot_type {
457 TARGET_DIF_TYPE0_PROT,
458 TARGET_DIF_TYPE1_PROT,
459 TARGET_DIF_TYPE2_PROT,
460 TARGET_DIF_TYPE3_PROT,
461 };
462
463 enum target_core_dif_check {
464 TARGET_DIF_CHECK_GUARD = 0x1 << 0,
465 TARGET_DIF_CHECK_APPTAG = 0x1 << 1,
466 TARGET_DIF_CHECK_REFTAG = 0x1 << 2,
467 };
468
469 struct se_dif_v1_tuple {
470 __be16 guard_tag;
471 __be16 app_tag;
472 __be32 ref_tag;
473 };
474
475 /* for sam_task_attr */
476 #define TCM_SIMPLE_TAG 0x20
477 #define TCM_HEAD_TAG 0x21
478 #define TCM_ORDERED_TAG 0x22
479 #define TCM_ACA_TAG 0x24
480
481 struct se_cmd {
482 /* SAM response code being sent to initiator */
483 u8 scsi_status;
484 u8 scsi_asc;
485 u8 scsi_ascq;
486 u16 scsi_sense_length;
487 /* Delay for ALUA Active/NonOptimized state access in milliseconds */
488 int alua_nonop_delay;
489 /* See include/linux/dma-mapping.h */
490 enum dma_data_direction data_direction;
491 /* For SAM Task Attribute */
492 int sam_task_attr;
493 /* Used for se_sess->sess_tag_pool */
494 unsigned int map_tag;
495 /* Transport protocol dependent state, see transport_state_table */
496 enum transport_state_table t_state;
497 unsigned cmd_wait_set:1;
498 unsigned unknown_data_length:1;
499 /* See se_cmd_flags_table */
500 u32 se_cmd_flags;
501 u32 se_ordered_id;
502 /* Total size in bytes associated with command */
503 u32 data_length;
504 u32 residual_count;
505 u32 orig_fe_lun;
506 /* Persistent Reservation key */
507 u64 pr_res_key;
508 /* Used for sense data */
509 void *sense_buffer;
510 struct list_head se_delayed_node;
511 struct list_head se_qf_node;
512 struct se_device *se_dev;
513 struct se_dev_entry *se_deve;
514 struct se_lun *se_lun;
515 /* Only used for internal passthrough and legacy TCM fabric modules */
516 struct se_session *se_sess;
517 struct se_tmr_req *se_tmr_req;
518 struct list_head se_cmd_list;
519 struct completion cmd_wait_comp;
520 struct kref cmd_kref;
521 const struct target_core_fabric_ops *se_tfo;
522 sense_reason_t (*execute_cmd)(struct se_cmd *);
523 sense_reason_t (*execute_rw)(struct se_cmd *, struct scatterlist *,
524 u32, enum dma_data_direction);
525 sense_reason_t (*transport_complete_callback)(struct se_cmd *, bool);
526
527 unsigned char *t_task_cdb;
528 unsigned char __t_task_cdb[TCM_MAX_COMMAND_SIZE];
529 unsigned long long t_task_lba;
530 unsigned int t_task_nolb;
531 unsigned int transport_state;
532 #define CMD_T_ABORTED (1 << 0)
533 #define CMD_T_ACTIVE (1 << 1)
534 #define CMD_T_COMPLETE (1 << 2)
535 #define CMD_T_SENT (1 << 4)
536 #define CMD_T_STOP (1 << 5)
537 #define CMD_T_DEV_ACTIVE (1 << 7)
538 #define CMD_T_REQUEST_STOP (1 << 8)
539 #define CMD_T_BUSY (1 << 9)
540 spinlock_t t_state_lock;
541 struct completion t_transport_stop_comp;
542
543 struct work_struct work;
544
545 struct scatterlist *t_data_sg;
546 struct scatterlist *t_data_sg_orig;
547 unsigned int t_data_nents;
548 unsigned int t_data_nents_orig;
549 void *t_data_vmap;
550 struct scatterlist *t_bidi_data_sg;
551 unsigned int t_bidi_data_nents;
552
553 struct list_head state_list;
554 bool state_active;
555
556 /* old task stop completion, consider merging with some of the above */
557 struct completion task_stop_comp;
558
559 /* backend private data */
560 void *priv;
561
562 /* Used for lun->lun_ref counting */
563 int lun_ref_active;
564
565 /* DIF related members */
566 enum target_prot_op prot_op;
567 enum target_prot_type prot_type;
568 u8 prot_checks;
569 u32 prot_length;
570 u32 reftag_seed;
571 struct scatterlist *t_prot_sg;
572 unsigned int t_prot_nents;
573 sense_reason_t pi_err;
574 sector_t bad_sector;
575 bool prot_pto;
576 };
577
578 struct se_ua {
579 u8 ua_asc;
580 u8 ua_ascq;
581 struct se_node_acl *ua_nacl;
582 struct list_head ua_nacl_list;
583 };
584
585 struct se_node_acl {
586 char initiatorname[TRANSPORT_IQN_LEN];
587 /* Used to signal demo mode created ACL, disabled by default */
588 bool dynamic_node_acl;
589 bool acl_stop:1;
590 u32 queue_depth;
591 u32 acl_index;
592 enum target_prot_type saved_prot_type;
593 #define MAX_ACL_TAG_SIZE 64
594 char acl_tag[MAX_ACL_TAG_SIZE];
595 /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
596 atomic_t acl_pr_ref_count;
597 struct se_dev_entry **device_list;
598 struct se_session *nacl_sess;
599 struct se_portal_group *se_tpg;
600 spinlock_t device_list_lock;
601 spinlock_t nacl_sess_lock;
602 struct config_group acl_group;
603 struct config_group acl_attrib_group;
604 struct config_group acl_auth_group;
605 struct config_group acl_param_group;
606 struct config_group acl_fabric_stat_group;
607 struct config_group *acl_default_groups[5];
608 struct list_head acl_list;
609 struct list_head acl_sess_list;
610 struct completion acl_free_comp;
611 struct kref acl_kref;
612 };
613
614 struct se_session {
615 unsigned sess_tearing_down:1;
616 u64 sess_bin_isid;
617 enum target_prot_op sup_prot_ops;
618 enum target_prot_type sess_prot_type;
619 struct se_node_acl *se_node_acl;
620 struct se_portal_group *se_tpg;
621 void *fabric_sess_ptr;
622 struct list_head sess_list;
623 struct list_head sess_acl_list;
624 struct list_head sess_cmd_list;
625 struct list_head sess_wait_list;
626 spinlock_t sess_cmd_lock;
627 struct kref sess_kref;
628 void *sess_cmd_map;
629 struct percpu_ida sess_tag_pool;
630 };
631
632 struct se_device;
633 struct se_transform_info;
634 struct scatterlist;
635
636 struct se_ml_stat_grps {
637 struct config_group stat_group;
638 struct config_group scsi_auth_intr_group;
639 struct config_group scsi_att_intr_port_group;
640 };
641
642 struct se_lun_acl {
643 char initiatorname[TRANSPORT_IQN_LEN];
644 u32 mapped_lun;
645 struct se_node_acl *se_lun_nacl;
646 struct se_lun *se_lun;
647 struct list_head lacl_list;
648 struct config_group se_lun_group;
649 struct se_ml_stat_grps ml_stat_grps;
650 };
651
652 struct se_dev_entry {
653 bool def_pr_registered;
654 /* See transport_lunflags_table */
655 u32 lun_flags;
656 u32 mapped_lun;
657 u32 total_cmds;
658 u64 pr_res_key;
659 u64 creation_time;
660 u32 attach_count;
661 u64 read_bytes;
662 u64 write_bytes;
663 atomic_t ua_count;
664 /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
665 atomic_t pr_ref_count;
666 struct se_lun_acl *se_lun_acl;
667 spinlock_t ua_lock;
668 struct se_lun *se_lun;
669 struct list_head alua_port_list;
670 struct list_head ua_list;
671 };
672
673 struct se_dev_attrib {
674 int emulate_model_alias;
675 int emulate_dpo;
676 int emulate_fua_write;
677 int emulate_fua_read;
678 int emulate_write_cache;
679 int emulate_ua_intlck_ctrl;
680 int emulate_tas;
681 int emulate_tpu;
682 int emulate_tpws;
683 int emulate_caw;
684 int emulate_3pc;
685 int pi_prot_format;
686 enum target_prot_type pi_prot_type;
687 enum target_prot_type hw_pi_prot_type;
688 int enforce_pr_isids;
689 int force_pr_aptpl;
690 int is_nonrot;
691 int emulate_rest_reord;
692 u32 hw_block_size;
693 u32 block_size;
694 u32 hw_max_sectors;
695 u32 optimal_sectors;
696 u32 hw_queue_depth;
697 u32 queue_depth;
698 u32 max_unmap_lba_count;
699 u32 max_unmap_block_desc_count;
700 u32 unmap_granularity;
701 u32 unmap_granularity_alignment;
702 u32 max_write_same_len;
703 u32 max_bytes_per_io;
704 struct se_device *da_dev;
705 struct config_group da_group;
706 };
707
708 struct se_port_stat_grps {
709 struct config_group stat_group;
710 struct config_group scsi_port_group;
711 struct config_group scsi_tgt_port_group;
712 struct config_group scsi_transport_group;
713 };
714
715 struct se_lun {
716 #define SE_LUN_LINK_MAGIC 0xffff7771
717 u32 lun_link_magic;
718 /* See transport_lun_status_table */
719 enum transport_lun_status_table lun_status;
720 u32 lun_access;
721 u32 lun_flags;
722 u32 unpacked_lun;
723 atomic_t lun_acl_count;
724 spinlock_t lun_acl_lock;
725 spinlock_t lun_sep_lock;
726 struct completion lun_shutdown_comp;
727 struct list_head lun_acl_list;
728 struct se_device *lun_se_dev;
729 struct se_port *lun_sep;
730 struct config_group lun_group;
731 struct se_port_stat_grps port_stat_grps;
732 struct completion lun_ref_comp;
733 struct percpu_ref lun_ref;
734 };
735
736 struct se_dev_stat_grps {
737 struct config_group stat_group;
738 struct config_group scsi_dev_group;
739 struct config_group scsi_tgt_dev_group;
740 struct config_group scsi_lu_group;
741 };
742
743 struct se_device {
744 #define SE_DEV_LINK_MAGIC 0xfeeddeef
745 u32 dev_link_magic;
746 /* RELATIVE TARGET PORT IDENTIFER Counter */
747 u16 dev_rpti_counter;
748 /* Used for SAM Task Attribute ordering */
749 u32 dev_cur_ordered_id;
750 u32 dev_flags;
751 #define DF_CONFIGURED 0x00000001
752 #define DF_FIRMWARE_VPD_UNIT_SERIAL 0x00000002
753 #define DF_EMULATED_VPD_UNIT_SERIAL 0x00000004
754 #define DF_USING_UDEV_PATH 0x00000008
755 #define DF_USING_ALIAS 0x00000010
756 u32 dev_port_count;
757 /* Physical device queue depth */
758 u32 queue_depth;
759 /* Used for SPC-2 reservations enforce of ISIDs */
760 u64 dev_res_bin_isid;
761 /* Pointer to transport specific device structure */
762 u32 dev_index;
763 u64 creation_time;
764 atomic_long_t num_resets;
765 atomic_long_t num_cmds;
766 atomic_long_t read_bytes;
767 atomic_long_t write_bytes;
768 /* Active commands on this virtual SE device */
769 atomic_t simple_cmds;
770 atomic_t dev_ordered_id;
771 atomic_t dev_ordered_sync;
772 atomic_t dev_qf_count;
773 int export_count;
774 spinlock_t delayed_cmd_lock;
775 spinlock_t execute_task_lock;
776 spinlock_t dev_reservation_lock;
777 unsigned int dev_reservation_flags;
778 #define DRF_SPC2_RESERVATIONS 0x00000001
779 #define DRF_SPC2_RESERVATIONS_WITH_ISID 0x00000002
780 spinlock_t se_port_lock;
781 spinlock_t se_tmr_lock;
782 spinlock_t qf_cmd_lock;
783 struct semaphore caw_sem;
784 /* Used for legacy SPC-2 reservationsa */
785 struct se_node_acl *dev_reserved_node_acl;
786 /* Used for ALUA Logical Unit Group membership */
787 struct t10_alua_lu_gp_member *dev_alua_lu_gp_mem;
788 /* Used for SPC-3 Persistent Reservations */
789 struct t10_pr_registration *dev_pr_res_holder;
790 struct list_head dev_sep_list;
791 struct list_head dev_tmr_list;
792 struct workqueue_struct *tmr_wq;
793 struct work_struct qf_work_queue;
794 struct list_head delayed_cmd_list;
795 struct list_head state_list;
796 struct list_head qf_cmd_list;
797 struct list_head g_dev_node;
798 /* Pointer to associated SE HBA */
799 struct se_hba *se_hba;
800 /* T10 Inquiry and VPD WWN Information */
801 struct t10_wwn t10_wwn;
802 /* T10 Asymmetric Logical Unit Assignment for Target Ports */
803 struct t10_alua t10_alua;
804 /* T10 SPC-2 + SPC-3 Reservations */
805 struct t10_reservation t10_pr;
806 struct se_dev_attrib dev_attrib;
807 struct config_group dev_group;
808 struct config_group dev_pr_group;
809 struct se_dev_stat_grps dev_stat_grps;
810 #define SE_DEV_ALIAS_LEN 512 /* must be less than PAGE_SIZE */
811 unsigned char dev_alias[SE_DEV_ALIAS_LEN];
812 #define SE_UDEV_PATH_LEN 512 /* must be less than PAGE_SIZE */
813 unsigned char udev_path[SE_UDEV_PATH_LEN];
814 /* Pointer to template of function pointers for transport */
815 struct se_subsystem_api *transport;
816 /* Linked list for struct se_hba struct se_device list */
817 struct list_head dev_list;
818 struct se_lun xcopy_lun;
819 /* Protection Information */
820 int prot_length;
821 };
822
823 struct se_hba {
824 u16 hba_tpgt;
825 u32 hba_id;
826 /* See hba_flags_table */
827 u32 hba_flags;
828 /* Virtual iSCSI devices attached. */
829 u32 dev_count;
830 u32 hba_index;
831 /* Pointer to transport specific host structure. */
832 void *hba_ptr;
833 struct list_head hba_node;
834 spinlock_t device_lock;
835 struct config_group hba_group;
836 struct mutex hba_access_mutex;
837 struct se_subsystem_api *transport;
838 };
839
840 struct scsi_port_stats {
841 u64 cmd_pdus;
842 u64 tx_data_octets;
843 u64 rx_data_octets;
844 };
845
846 struct se_port {
847 /* RELATIVE TARGET PORT IDENTIFER */
848 u16 sep_rtpi;
849 int sep_tg_pt_secondary_stat;
850 int sep_tg_pt_secondary_write_md;
851 u32 sep_index;
852 struct scsi_port_stats sep_stats;
853 /* Used for ALUA Target Port Groups membership */
854 atomic_t sep_tg_pt_secondary_offline;
855 /* Used for PR ALL_TG_PT=1 */
856 atomic_t sep_tg_pt_ref_cnt;
857 spinlock_t sep_alua_lock;
858 struct mutex sep_tg_pt_md_mutex;
859 struct t10_alua_tg_pt_gp_member *sep_alua_tg_pt_gp_mem;
860 struct se_lun *sep_lun;
861 struct se_portal_group *sep_tpg;
862 struct list_head sep_alua_list;
863 struct list_head sep_list;
864 };
865
866 struct se_tpg_np {
867 struct se_portal_group *tpg_np_parent;
868 struct config_group tpg_np_group;
869 };
870
871 struct se_portal_group {
872 /* Type of target portal group, see transport_tpg_type_table */
873 enum transport_tpg_type_table se_tpg_type;
874 /* Number of ACLed Initiator Nodes for this TPG */
875 u32 num_node_acls;
876 /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
877 atomic_t tpg_pr_ref_count;
878 /* Spinlock for adding/removing ACLed Nodes */
879 spinlock_t acl_node_lock;
880 /* Spinlock for adding/removing sessions */
881 spinlock_t session_lock;
882 spinlock_t tpg_lun_lock;
883 /* Pointer to $FABRIC_MOD portal group */
884 void *se_tpg_fabric_ptr;
885 struct list_head se_tpg_node;
886 /* linked list for initiator ACL list */
887 struct list_head acl_node_list;
888 struct se_lun **tpg_lun_list;
889 struct se_lun tpg_virt_lun0;
890 /* List of TCM sessions associated wth this TPG */
891 struct list_head tpg_sess_list;
892 /* Pointer to $FABRIC_MOD dependent code */
893 const struct target_core_fabric_ops *se_tpg_tfo;
894 struct se_wwn *se_tpg_wwn;
895 struct config_group tpg_group;
896 struct config_group *tpg_default_groups[7];
897 struct config_group tpg_lun_group;
898 struct config_group tpg_np_group;
899 struct config_group tpg_acl_group;
900 struct config_group tpg_attrib_group;
901 struct config_group tpg_auth_group;
902 struct config_group tpg_param_group;
903 };
904
905 struct se_wwn {
906 struct target_fabric_configfs *wwn_tf;
907 struct config_group wwn_group;
908 struct config_group *wwn_default_groups[2];
909 struct config_group fabric_stat_group;
910 };
911
912 static inline void atomic_inc_mb(atomic_t *v)
913 {
914 smp_mb__before_atomic();
915 atomic_inc(v);
916 smp_mb__after_atomic();
917 }
918
919 static inline void atomic_dec_mb(atomic_t *v)
920 {
921 smp_mb__before_atomic();
922 atomic_dec(v);
923 smp_mb__after_atomic();
924 }
925
926 #endif /* TARGET_CORE_BASE_H */
Linux with added FPC-III support