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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 */
123enum hba_flags_table {
124 HBA_FLAGS_INTERNAL_USE = 0x01,
125 HBA_FLAGS_PSCSI_MODE = 0x02,
126};
127
128/* struct se_lun->lun_status */
129enum 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 */
135enum 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 */
141enum 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 */
153enum 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 */
175enum 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 */
186typedef unsigned __bitwise__ sense_reason_t;
187
188enum 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
217enum 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 */
224enum 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 */
235enum 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 */
247typedef enum {
248 SCSI_INST_INDEX,
249 SCSI_DEVICE_INDEX,
250 SCSI_AUTH_INTR_INDEX,
251 SCSI_INDEX_TYPE_MAX
252} scsi_index_t;
253
254struct se_cmd;
255
256struct 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
262struct 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
269struct 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
287struct 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
298struct 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
307struct 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
335struct 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
344struct 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
354struct 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
365struct 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
404struct 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
429struct 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
444enum 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
458enum 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
465enum 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
471struct se_dif_v1_tuple {
472 __be16 guard_tag;
473 __be16 app_tag;
474 __be32 ref_tag;
475};
476
477struct 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
574struct 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
581struct 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
609struct 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
626struct se_device;
627struct se_transform_info;
628struct scatterlist;
629
630struct 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
636struct 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
646struct 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
667struct 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
702struct se_port_stat_grps {
703 struct config_group stat_group;
704 struct config_group scsi_port_group;
705 struct config_group scsi_tgt_port_group;
706 struct config_group scsi_transport_group;
707};
708
709struct 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
730struct 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
737struct 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
817struct 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
834struct scsi_port_stats {
835 u64 cmd_pdus;
836 u64 tx_data_octets;
837 u64 rx_data_octets;
838};
839
840struct 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
860struct se_tpg_np {
861 struct se_portal_group *tpg_np_parent;
862 struct config_group tpg_np_group;
863};
864
865struct 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
899struct 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 */
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/percpu_ida.h> /* struct percpu_ida */
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 */
106enum 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 */
112enum 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 */
125enum 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};
147
148/*
149 * Used by transport_send_check_condition_and_sense()
150 * to signal which ASC/ASCQ sense payload should be built.
151 */
152typedef unsigned __bitwise sense_reason_t;
153
154enum tcm_sense_reason_table {
155#define R(x) (__force sense_reason_t )(x)
156 TCM_NO_SENSE = R(0x00),
157 TCM_NON_EXISTENT_LUN = R(0x01),
158 TCM_UNSUPPORTED_SCSI_OPCODE = R(0x02),
159 TCM_INCORRECT_AMOUNT_OF_DATA = R(0x03),
160 TCM_UNEXPECTED_UNSOLICITED_DATA = R(0x04),
161 TCM_SERVICE_CRC_ERROR = R(0x05),
162 TCM_SNACK_REJECTED = R(0x06),
163 TCM_SECTOR_COUNT_TOO_MANY = R(0x07),
164 TCM_INVALID_CDB_FIELD = R(0x08),
165 TCM_INVALID_PARAMETER_LIST = R(0x09),
166 TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE = R(0x0a),
167 TCM_UNKNOWN_MODE_PAGE = R(0x0b),
168 TCM_WRITE_PROTECTED = R(0x0c),
169 TCM_CHECK_CONDITION_ABORT_CMD = R(0x0d),
170 TCM_CHECK_CONDITION_UNIT_ATTENTION = R(0x0e),
171 TCM_CHECK_CONDITION_NOT_READY = R(0x0f),
172 TCM_RESERVATION_CONFLICT = R(0x10),
173 TCM_ADDRESS_OUT_OF_RANGE = R(0x11),
174 TCM_OUT_OF_RESOURCES = R(0x12),
175 TCM_PARAMETER_LIST_LENGTH_ERROR = R(0x13),
176 TCM_MISCOMPARE_VERIFY = R(0x14),
177 TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED = R(0x15),
178 TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED = R(0x16),
179 TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED = R(0x17),
180 TCM_COPY_TARGET_DEVICE_NOT_REACHABLE = R(0x18),
181 TCM_TOO_MANY_TARGET_DESCS = R(0x19),
182 TCM_UNSUPPORTED_TARGET_DESC_TYPE_CODE = R(0x1a),
183 TCM_TOO_MANY_SEGMENT_DESCS = R(0x1b),
184 TCM_UNSUPPORTED_SEGMENT_DESC_TYPE_CODE = R(0x1c),
185 TCM_INSUFFICIENT_REGISTRATION_RESOURCES = R(0x1d),
186 TCM_LUN_BUSY = R(0x1e),
187#undef R
188};
189
190enum target_sc_flags_table {
191 TARGET_SCF_BIDI_OP = 0x01,
192 TARGET_SCF_ACK_KREF = 0x02,
193 TARGET_SCF_UNKNOWN_SIZE = 0x04,
194 TARGET_SCF_USE_CPUID = 0x08,
195 TARGET_SCF_LOOKUP_LUN_FROM_TAG = 0x10,
196};
197
198/* fabric independent task management function values */
199enum tcm_tmreq_table {
200 TMR_ABORT_TASK = 1,
201 TMR_ABORT_TASK_SET = 2,
202 TMR_CLEAR_ACA = 3,
203 TMR_CLEAR_TASK_SET = 4,
204 TMR_LUN_RESET = 5,
205 TMR_TARGET_WARM_RESET = 6,
206 TMR_TARGET_COLD_RESET = 7,
207 TMR_UNKNOWN = 0xff,
208};
209
210/* fabric independent task management response values */
211enum tcm_tmrsp_table {
212 TMR_FUNCTION_FAILED = 0,
213 TMR_FUNCTION_COMPLETE = 1,
214 TMR_TASK_DOES_NOT_EXIST = 2,
215 TMR_LUN_DOES_NOT_EXIST = 3,
216 TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED = 4,
217 TMR_FUNCTION_REJECTED = 5,
218};
219
220/*
221 * Used for target SCSI statistics
222 */
223typedef enum {
224 SCSI_INST_INDEX,
225 SCSI_AUTH_INTR_INDEX,
226 SCSI_INDEX_TYPE_MAX
227} scsi_index_t;
228
229struct se_cmd;
230
231struct t10_alua_lba_map_member {
232 struct list_head lba_map_mem_list;
233 int lba_map_mem_alua_state;
234 int lba_map_mem_alua_pg_id;
235};
236
237struct t10_alua_lba_map {
238 u64 lba_map_first_lba;
239 u64 lba_map_last_lba;
240 struct list_head lba_map_list;
241 struct list_head lba_map_mem_list;
242};
243
244struct t10_alua {
245 /* ALUA Target Port Group ID */
246 u16 alua_tg_pt_gps_counter;
247 u32 alua_tg_pt_gps_count;
248 /* Referrals support */
249 spinlock_t lba_map_lock;
250 u32 lba_map_segment_size;
251 u32 lba_map_segment_multiplier;
252 struct list_head lba_map_list;
253 spinlock_t tg_pt_gps_lock;
254 struct se_device *t10_dev;
255 /* Used for default ALUA Target Port Group */
256 struct t10_alua_tg_pt_gp *default_tg_pt_gp;
257 /* Used for default ALUA Target Port Group ConfigFS group */
258 struct config_group alua_tg_pt_gps_group;
259 struct list_head tg_pt_gps_list;
260};
261
262struct t10_alua_lu_gp {
263 u16 lu_gp_id;
264 int lu_gp_valid_id;
265 u32 lu_gp_members;
266 atomic_t lu_gp_ref_cnt;
267 spinlock_t lu_gp_lock;
268 struct config_group lu_gp_group;
269 struct list_head lu_gp_node;
270 struct list_head lu_gp_mem_list;
271};
272
273struct t10_alua_lu_gp_member {
274 bool lu_gp_assoc;
275 atomic_t lu_gp_mem_ref_cnt;
276 spinlock_t lu_gp_mem_lock;
277 struct t10_alua_lu_gp *lu_gp;
278 struct se_device *lu_gp_mem_dev;
279 struct list_head lu_gp_mem_list;
280};
281
282struct t10_alua_tg_pt_gp {
283 u16 tg_pt_gp_id;
284 int tg_pt_gp_valid_id;
285 int tg_pt_gp_alua_supported_states;
286 int tg_pt_gp_alua_access_status;
287 int tg_pt_gp_alua_access_type;
288 int tg_pt_gp_nonop_delay_msecs;
289 int tg_pt_gp_trans_delay_msecs;
290 int tg_pt_gp_implicit_trans_secs;
291 int tg_pt_gp_pref;
292 int tg_pt_gp_write_metadata;
293 u32 tg_pt_gp_members;
294 int tg_pt_gp_alua_access_state;
295 atomic_t tg_pt_gp_ref_cnt;
296 spinlock_t tg_pt_gp_lock;
297 struct mutex tg_pt_gp_transition_mutex;
298 struct se_device *tg_pt_gp_dev;
299 struct config_group tg_pt_gp_group;
300 struct list_head tg_pt_gp_list;
301 struct list_head tg_pt_gp_lun_list;
302 struct se_lun *tg_pt_gp_alua_lun;
303 struct se_node_acl *tg_pt_gp_alua_nacl;
304};
305
306struct t10_vpd {
307 unsigned char device_identifier[INQUIRY_VPD_DEVICE_IDENTIFIER_LEN];
308 int protocol_identifier_set;
309 u32 protocol_identifier;
310 u32 device_identifier_code_set;
311 u32 association;
312 u32 device_identifier_type;
313 struct list_head vpd_list;
314};
315
316struct t10_wwn {
317 char vendor[8];
318 char model[16];
319 char revision[4];
320 char unit_serial[INQUIRY_VPD_SERIAL_LEN];
321 spinlock_t t10_vpd_lock;
322 struct se_device *t10_dev;
323 struct config_group t10_wwn_group;
324 struct list_head t10_vpd_list;
325};
326
327struct t10_pr_registration {
328 /* Used for fabrics that contain WWN+ISID */
329#define PR_REG_ISID_LEN 16
330 /* PR_REG_ISID_LEN + ',i,0x' */
331#define PR_REG_ISID_ID_LEN (PR_REG_ISID_LEN + 5)
332 char pr_reg_isid[PR_REG_ISID_LEN];
333 /* Used during APTPL metadata reading */
334#define PR_APTPL_MAX_IPORT_LEN 256
335 unsigned char pr_iport[PR_APTPL_MAX_IPORT_LEN];
336 /* Used during APTPL metadata reading */
337#define PR_APTPL_MAX_TPORT_LEN 256
338 unsigned char pr_tport[PR_APTPL_MAX_TPORT_LEN];
339 u16 pr_aptpl_rpti;
340 u16 pr_reg_tpgt;
341 /* Reservation effects all target ports */
342 int pr_reg_all_tg_pt;
343 /* Activate Persistence across Target Power Loss */
344 int pr_reg_aptpl;
345 int pr_res_holder;
346 int pr_res_type;
347 int pr_res_scope;
348 /* Used for fabric initiator WWPNs using a ISID */
349 bool isid_present_at_reg;
350 u64 pr_res_mapped_lun;
351 u64 pr_aptpl_target_lun;
352 u16 tg_pt_sep_rtpi;
353 u32 pr_res_generation;
354 u64 pr_reg_bin_isid;
355 u64 pr_res_key;
356 atomic_t pr_res_holders;
357 struct se_node_acl *pr_reg_nacl;
358 /* Used by ALL_TG_PT=1 registration with deve->pr_ref taken */
359 struct se_dev_entry *pr_reg_deve;
360 struct list_head pr_reg_list;
361 struct list_head pr_reg_abort_list;
362 struct list_head pr_reg_aptpl_list;
363 struct list_head pr_reg_atp_list;
364 struct list_head pr_reg_atp_mem_list;
365};
366
367struct t10_reservation {
368 /* Reservation effects all target ports */
369 int pr_all_tg_pt;
370 /* Activate Persistence across Target Power Loss enabled
371 * for SCSI device */
372 int pr_aptpl_active;
373#define PR_APTPL_BUF_LEN 262144
374 u32 pr_generation;
375 spinlock_t registration_lock;
376 spinlock_t aptpl_reg_lock;
377 /*
378 * This will always be set by one individual I_T Nexus.
379 * However with all_tg_pt=1, other I_T Nexus from the
380 * same initiator can access PR reg/res info on a different
381 * target port.
382 *
383 * There is also the 'All Registrants' case, where there is
384 * a single *pr_res_holder of the reservation, but all
385 * registrations are considered reservation holders.
386 */
387 struct se_node_acl *pr_res_holder;
388 struct list_head registration_list;
389 struct list_head aptpl_reg_list;
390};
391
392struct se_tmr_req {
393 /* Task Management function to be performed */
394 u8 function;
395 /* Task Management response to send */
396 u8 response;
397 int call_transport;
398 /* Reference to ITT that Task Mgmt should be performed */
399 u64 ref_task_tag;
400 void *fabric_tmr_ptr;
401 struct se_cmd *task_cmd;
402 struct se_device *tmr_dev;
403 struct list_head tmr_list;
404};
405
406enum target_prot_op {
407 TARGET_PROT_NORMAL = 0,
408 TARGET_PROT_DIN_INSERT = (1 << 0),
409 TARGET_PROT_DOUT_INSERT = (1 << 1),
410 TARGET_PROT_DIN_STRIP = (1 << 2),
411 TARGET_PROT_DOUT_STRIP = (1 << 3),
412 TARGET_PROT_DIN_PASS = (1 << 4),
413 TARGET_PROT_DOUT_PASS = (1 << 5),
414};
415
416#define TARGET_PROT_ALL TARGET_PROT_DIN_INSERT | TARGET_PROT_DOUT_INSERT | \
417 TARGET_PROT_DIN_STRIP | TARGET_PROT_DOUT_STRIP | \
418 TARGET_PROT_DIN_PASS | TARGET_PROT_DOUT_PASS
419
420enum target_prot_type {
421 TARGET_DIF_TYPE0_PROT,
422 TARGET_DIF_TYPE1_PROT,
423 TARGET_DIF_TYPE2_PROT,
424 TARGET_DIF_TYPE3_PROT,
425};
426
427enum target_core_dif_check {
428 TARGET_DIF_CHECK_GUARD = 0x1 << 0,
429 TARGET_DIF_CHECK_APPTAG = 0x1 << 1,
430 TARGET_DIF_CHECK_REFTAG = 0x1 << 2,
431};
432
433/* for sam_task_attr */
434#define TCM_SIMPLE_TAG 0x20
435#define TCM_HEAD_TAG 0x21
436#define TCM_ORDERED_TAG 0x22
437#define TCM_ACA_TAG 0x24
438
439struct se_cmd {
440 /* SAM response code being sent to initiator */
441 u8 scsi_status;
442 u8 scsi_asc;
443 u8 scsi_ascq;
444 u16 scsi_sense_length;
445 unsigned cmd_wait_set:1;
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 /* Transport protocol dependent state, see transport_state_table */
458 enum transport_state_table t_state;
459 /* See se_cmd_flags_table */
460 u32 se_cmd_flags;
461 /* Total size in bytes associated with command */
462 u32 data_length;
463 u32 residual_count;
464 u64 orig_fe_lun;
465 /* Persistent Reservation key */
466 u64 pr_res_key;
467 /* Used for sense data */
468 void *sense_buffer;
469 struct list_head se_delayed_node;
470 struct list_head se_qf_node;
471 struct se_device *se_dev;
472 struct se_lun *se_lun;
473 /* Only used for internal passthrough and legacy TCM fabric modules */
474 struct se_session *se_sess;
475 struct se_tmr_req *se_tmr_req;
476 struct list_head se_cmd_list;
477 struct completion cmd_wait_comp;
478 const struct target_core_fabric_ops *se_tfo;
479 sense_reason_t (*execute_cmd)(struct se_cmd *);
480 sense_reason_t (*transport_complete_callback)(struct se_cmd *, bool, int *);
481 void *protocol_data;
482
483 unsigned char *t_task_cdb;
484 unsigned char __t_task_cdb[TCM_MAX_COMMAND_SIZE];
485 unsigned long long t_task_lba;
486 unsigned int t_task_nolb;
487 unsigned int transport_state;
488#define CMD_T_ABORTED (1 << 0)
489#define CMD_T_ACTIVE (1 << 1)
490#define CMD_T_COMPLETE (1 << 2)
491#define CMD_T_SENT (1 << 4)
492#define CMD_T_STOP (1 << 5)
493#define CMD_T_TAS (1 << 10)
494#define CMD_T_FABRIC_STOP (1 << 11)
495#define CMD_T_PRE_EXECUTE (1 << 12)
496 spinlock_t t_state_lock;
497 struct kref cmd_kref;
498 struct completion t_transport_stop_comp;
499
500 struct work_struct work;
501
502 struct scatterlist *t_data_sg;
503 struct scatterlist *t_data_sg_orig;
504 unsigned int t_data_nents;
505 unsigned int t_data_nents_orig;
506 void *t_data_vmap;
507 struct scatterlist *t_bidi_data_sg;
508 unsigned int t_bidi_data_nents;
509
510 /* Used for lun->lun_ref counting */
511 int lun_ref_active;
512
513 struct list_head state_list;
514
515 /* backend private data */
516 void *priv;
517
518 /* DIF related members */
519 enum target_prot_op prot_op;
520 enum target_prot_type prot_type;
521 u8 prot_checks;
522 bool prot_pto;
523 u32 prot_length;
524 u32 reftag_seed;
525 struct scatterlist *t_prot_sg;
526 unsigned int t_prot_nents;
527 sense_reason_t pi_err;
528 sector_t bad_sector;
529 int cpuid;
530};
531
532struct se_ua {
533 u8 ua_asc;
534 u8 ua_ascq;
535 struct list_head ua_nacl_list;
536};
537
538struct se_node_acl {
539 char initiatorname[TRANSPORT_IQN_LEN];
540 /* Used to signal demo mode created ACL, disabled by default */
541 bool dynamic_node_acl;
542 bool dynamic_stop;
543 u32 queue_depth;
544 u32 acl_index;
545 enum target_prot_type saved_prot_type;
546#define MAX_ACL_TAG_SIZE 64
547 char acl_tag[MAX_ACL_TAG_SIZE];
548 /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
549 atomic_t acl_pr_ref_count;
550 struct hlist_head lun_entry_hlist;
551 struct se_session *nacl_sess;
552 struct se_portal_group *se_tpg;
553 struct mutex lun_entry_mutex;
554 spinlock_t nacl_sess_lock;
555 struct config_group acl_group;
556 struct config_group acl_attrib_group;
557 struct config_group acl_auth_group;
558 struct config_group acl_param_group;
559 struct config_group acl_fabric_stat_group;
560 struct list_head acl_list;
561 struct list_head acl_sess_list;
562 struct completion acl_free_comp;
563 struct kref acl_kref;
564};
565
566static inline struct se_node_acl *acl_to_nacl(struct config_item *item)
567{
568 return container_of(to_config_group(item), struct se_node_acl,
569 acl_group);
570}
571
572static inline struct se_node_acl *attrib_to_nacl(struct config_item *item)
573{
574 return container_of(to_config_group(item), struct se_node_acl,
575 acl_attrib_group);
576}
577
578static inline struct se_node_acl *auth_to_nacl(struct config_item *item)
579{
580 return container_of(to_config_group(item), struct se_node_acl,
581 acl_auth_group);
582}
583
584static inline struct se_node_acl *param_to_nacl(struct config_item *item)
585{
586 return container_of(to_config_group(item), struct se_node_acl,
587 acl_param_group);
588}
589
590static inline struct se_node_acl *fabric_stat_to_nacl(struct config_item *item)
591{
592 return container_of(to_config_group(item), struct se_node_acl,
593 acl_fabric_stat_group);
594}
595
596struct se_session {
597 unsigned sess_tearing_down:1;
598 u64 sess_bin_isid;
599 enum target_prot_op sup_prot_ops;
600 enum target_prot_type sess_prot_type;
601 struct se_node_acl *se_node_acl;
602 struct se_portal_group *se_tpg;
603 void *fabric_sess_ptr;
604 struct list_head sess_list;
605 struct list_head sess_acl_list;
606 struct list_head sess_cmd_list;
607 struct list_head sess_wait_list;
608 spinlock_t sess_cmd_lock;
609 void *sess_cmd_map;
610 struct percpu_ida sess_tag_pool;
611};
612
613struct se_device;
614struct se_transform_info;
615struct scatterlist;
616
617struct se_ml_stat_grps {
618 struct config_group stat_group;
619 struct config_group scsi_auth_intr_group;
620 struct config_group scsi_att_intr_port_group;
621};
622
623struct se_lun_acl {
624 u64 mapped_lun;
625 struct se_node_acl *se_lun_nacl;
626 struct se_lun *se_lun;
627 struct config_group se_lun_group;
628 struct se_ml_stat_grps ml_stat_grps;
629};
630
631struct se_dev_entry {
632 u64 mapped_lun;
633 u64 pr_res_key;
634 u64 creation_time;
635 bool lun_access_ro;
636 u32 attach_count;
637 atomic_long_t total_cmds;
638 atomic_long_t read_bytes;
639 atomic_long_t write_bytes;
640 atomic_t ua_count;
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
656struct 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
693struct 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
700struct 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
706struct 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
743struct 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
750struct 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
830struct 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
847struct se_tpg_np {
848 struct se_portal_group *tpg_np_parent;
849 struct config_group tpg_np_group;
850};
851
852static 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
858struct 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
891static 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
897static 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
903static 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
909static 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
915struct 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
922static 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
929static 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#endif /* TARGET_CORE_BASE_H */