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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 <scsi/scsi_cmnd.h>
9#include <net/sock.h>
10#include <net/tcp.h>
11
12#define TARGET_CORE_MOD_VERSION "v4.1.0-rc1-ml"
13#define SHUTDOWN_SIGS (sigmask(SIGKILL)|sigmask(SIGINT)|sigmask(SIGABRT))
14
15/* Used by transport_generic_allocate_iovecs() */
16#define TRANSPORT_IOV_DATA_BUFFER 5
17/* Maximum Number of LUNs per Target Portal Group */
18/* Don't raise above 511 or REPORT_LUNS needs to handle >1 page */
19#define TRANSPORT_MAX_LUNS_PER_TPG 256
20/*
21 * By default we use 32-byte CDBs in TCM Core and subsystem plugin code.
22 *
23 * Note that both include/scsi/scsi_cmnd.h:MAX_COMMAND_SIZE and
24 * include/linux/blkdev.h:BLOCK_MAX_CDB as of v2.6.36-rc4 still use
25 * 16-byte CDBs by default and require an extra allocation for
26 * 32-byte CDBs to because of legacy issues.
27 *
28 * Within TCM Core there are no such legacy limitiations, so we go ahead
29 * use 32-byte CDBs by default and use include/scsi/scsi.h:scsi_command_size()
30 * within all TCM Core and subsystem plugin code.
31 */
32#define TCM_MAX_COMMAND_SIZE 32
33/*
34 * From include/scsi/scsi_cmnd.h:SCSI_SENSE_BUFFERSIZE, currently
35 * defined 96, but the real limit is 252 (or 260 including the header)
36 */
37#define TRANSPORT_SENSE_BUFFER SCSI_SENSE_BUFFERSIZE
38/* Used by transport_send_check_condition_and_sense() */
39#define SPC_SENSE_KEY_OFFSET 2
40#define SPC_ASC_KEY_OFFSET 12
41#define SPC_ASCQ_KEY_OFFSET 13
42#define TRANSPORT_IQN_LEN 224
43/* Used by target_core_store_alua_lu_gp() and target_core_alua_lu_gp_show_attr_members() */
44#define LU_GROUP_NAME_BUF 256
45/* Used by core_alua_store_tg_pt_gp_info() and target_core_alua_tg_pt_gp_show_attr_members() */
46#define TG_PT_GROUP_NAME_BUF 256
47/* Used to parse VPD into struct t10_vpd */
48#define VPD_TMP_BUF_SIZE 128
49/* Used by transport_generic_cmd_sequencer() */
50#define READ_BLOCK_LEN 6
51#define READ_CAP_LEN 8
52#define READ_POSITION_LEN 20
53#define INQUIRY_LEN 36
54/* Used by transport_get_inquiry_vpd_serial() */
55#define INQUIRY_VPD_SERIAL_LEN 254
56/* Used by transport_get_inquiry_vpd_device_ident() */
57#define INQUIRY_VPD_DEVICE_IDENTIFIER_LEN 254
58
59/* struct se_hba->hba_flags */
60enum hba_flags_table {
61 HBA_FLAGS_INTERNAL_USE = 0x01,
62 HBA_FLAGS_PSCSI_MODE = 0x02,
63};
64
65/* struct se_lun->lun_status */
66enum transport_lun_status_table {
67 TRANSPORT_LUN_STATUS_FREE = 0,
68 TRANSPORT_LUN_STATUS_ACTIVE = 1,
69};
70
71/* struct se_portal_group->se_tpg_type */
72enum transport_tpg_type_table {
73 TRANSPORT_TPG_TYPE_NORMAL = 0,
74 TRANSPORT_TPG_TYPE_DISCOVERY = 1,
75};
76
77/* Used for generate timer flags */
78enum timer_flags_table {
79 TF_RUNNING = 0x01,
80 TF_STOP = 0x02,
81};
82
83/* Special transport agnostic struct se_cmd->t_states */
84enum transport_state_table {
85 TRANSPORT_NO_STATE = 0,
86 TRANSPORT_NEW_CMD = 1,
87 TRANSPORT_DEFERRED_CMD = 2,
88 TRANSPORT_WRITE_PENDING = 3,
89 TRANSPORT_PROCESS_WRITE = 4,
90 TRANSPORT_PROCESSING = 5,
91 TRANSPORT_COMPLETE_OK = 6,
92 TRANSPORT_COMPLETE_FAILURE = 7,
93 TRANSPORT_COMPLETE_TIMEOUT = 8,
94 TRANSPORT_PROCESS_TMR = 9,
95 TRANSPORT_TMR_COMPLETE = 10,
96 TRANSPORT_ISTATE_PROCESSING = 11,
97 TRANSPORT_ISTATE_PROCESSED = 12,
98 TRANSPORT_KILL = 13,
99 TRANSPORT_REMOVE = 14,
100 TRANSPORT_FREE = 15,
101 TRANSPORT_NEW_CMD_MAP = 16,
102 TRANSPORT_FREE_CMD_INTR = 17,
103 TRANSPORT_COMPLETE_QF_WP = 18,
104};
105
106/* Used for struct se_cmd->se_cmd_flags */
107enum se_cmd_flags_table {
108 SCF_SUPPORTED_SAM_OPCODE = 0x00000001,
109 SCF_TRANSPORT_TASK_SENSE = 0x00000002,
110 SCF_EMULATED_TASK_SENSE = 0x00000004,
111 SCF_SCSI_DATA_SG_IO_CDB = 0x00000008,
112 SCF_SCSI_CONTROL_SG_IO_CDB = 0x00000010,
113 SCF_SCSI_NON_DATA_CDB = 0x00000040,
114 SCF_SCSI_CDB_EXCEPTION = 0x00000080,
115 SCF_SCSI_RESERVATION_CONFLICT = 0x00000100,
116 SCF_SE_CMD_FAILED = 0x00000400,
117 SCF_SE_LUN_CMD = 0x00000800,
118 SCF_SE_ALLOW_EOO = 0x00001000,
119 SCF_SENT_CHECK_CONDITION = 0x00004000,
120 SCF_OVERFLOW_BIT = 0x00008000,
121 SCF_UNDERFLOW_BIT = 0x00010000,
122 SCF_SENT_DELAYED_TAS = 0x00020000,
123 SCF_ALUA_NON_OPTIMIZED = 0x00040000,
124 SCF_DELAYED_CMD_FROM_SAM_ATTR = 0x00080000,
125 SCF_UNUSED = 0x00100000,
126 SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC = 0x00400000,
127 SCF_EMULATE_CDB_ASYNC = 0x01000000,
128 SCF_EMULATE_QUEUE_FULL = 0x02000000,
129};
130
131/* struct se_dev_entry->lun_flags and struct se_lun->lun_access */
132enum transport_lunflags_table {
133 TRANSPORT_LUNFLAGS_NO_ACCESS = 0x00,
134 TRANSPORT_LUNFLAGS_INITIATOR_ACCESS = 0x01,
135 TRANSPORT_LUNFLAGS_READ_ONLY = 0x02,
136 TRANSPORT_LUNFLAGS_READ_WRITE = 0x04,
137};
138
139/* struct se_device->dev_status */
140enum transport_device_status_table {
141 TRANSPORT_DEVICE_ACTIVATED = 0x01,
142 TRANSPORT_DEVICE_DEACTIVATED = 0x02,
143 TRANSPORT_DEVICE_QUEUE_FULL = 0x04,
144 TRANSPORT_DEVICE_SHUTDOWN = 0x08,
145 TRANSPORT_DEVICE_OFFLINE_ACTIVATED = 0x10,
146 TRANSPORT_DEVICE_OFFLINE_DEACTIVATED = 0x20,
147};
148
149/*
150 * Used by transport_send_check_condition_and_sense() and se_cmd->scsi_sense_reason
151 * to signal which ASC/ASCQ sense payload should be built.
152 */
153enum tcm_sense_reason_table {
154 TCM_NON_EXISTENT_LUN = 0x01,
155 TCM_UNSUPPORTED_SCSI_OPCODE = 0x02,
156 TCM_INCORRECT_AMOUNT_OF_DATA = 0x03,
157 TCM_UNEXPECTED_UNSOLICITED_DATA = 0x04,
158 TCM_SERVICE_CRC_ERROR = 0x05,
159 TCM_SNACK_REJECTED = 0x06,
160 TCM_SECTOR_COUNT_TOO_MANY = 0x07,
161 TCM_INVALID_CDB_FIELD = 0x08,
162 TCM_INVALID_PARAMETER_LIST = 0x09,
163 TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE = 0x0a,
164 TCM_UNKNOWN_MODE_PAGE = 0x0b,
165 TCM_WRITE_PROTECTED = 0x0c,
166 TCM_CHECK_CONDITION_ABORT_CMD = 0x0d,
167 TCM_CHECK_CONDITION_UNIT_ATTENTION = 0x0e,
168 TCM_CHECK_CONDITION_NOT_READY = 0x0f,
169};
170
171struct se_obj {
172 atomic_t obj_access_count;
173} ____cacheline_aligned;
174
175/*
176 * Used by TCM Core internally to signal if ALUA emulation is enabled or
177 * disabled, or running in with TCM/pSCSI passthrough mode
178 */
179typedef enum {
180 SPC_ALUA_PASSTHROUGH,
181 SPC2_ALUA_DISABLED,
182 SPC3_ALUA_EMULATED
183} t10_alua_index_t;
184
185/*
186 * Used by TCM Core internally to signal if SAM Task Attribute emulation
187 * is enabled or disabled, or running in with TCM/pSCSI passthrough mode
188 */
189typedef enum {
190 SAM_TASK_ATTR_PASSTHROUGH,
191 SAM_TASK_ATTR_UNTAGGED,
192 SAM_TASK_ATTR_EMULATED
193} t10_task_attr_index_t;
194
195/*
196 * Used for target SCSI statistics
197 */
198typedef enum {
199 SCSI_INST_INDEX,
200 SCSI_DEVICE_INDEX,
201 SCSI_AUTH_INTR_INDEX,
202 SCSI_INDEX_TYPE_MAX
203} scsi_index_t;
204
205struct se_cmd;
206
207struct t10_alua {
208 t10_alua_index_t alua_type;
209 /* ALUA Target Port Group ID */
210 u16 alua_tg_pt_gps_counter;
211 u32 alua_tg_pt_gps_count;
212 spinlock_t tg_pt_gps_lock;
213 struct se_subsystem_dev *t10_sub_dev;
214 /* Used for default ALUA Target Port Group */
215 struct t10_alua_tg_pt_gp *default_tg_pt_gp;
216 /* Used for default ALUA Target Port Group ConfigFS group */
217 struct config_group alua_tg_pt_gps_group;
218 int (*alua_state_check)(struct se_cmd *, unsigned char *, u8 *);
219 struct list_head tg_pt_gps_list;
220} ____cacheline_aligned;
221
222struct t10_alua_lu_gp {
223 u16 lu_gp_id;
224 int lu_gp_valid_id;
225 u32 lu_gp_members;
226 atomic_t lu_gp_shutdown;
227 atomic_t lu_gp_ref_cnt;
228 spinlock_t lu_gp_lock;
229 struct config_group lu_gp_group;
230 struct list_head lu_gp_node;
231 struct list_head lu_gp_mem_list;
232} ____cacheline_aligned;
233
234struct t10_alua_lu_gp_member {
235 bool lu_gp_assoc;
236 atomic_t lu_gp_mem_ref_cnt;
237 spinlock_t lu_gp_mem_lock;
238 struct t10_alua_lu_gp *lu_gp;
239 struct se_device *lu_gp_mem_dev;
240 struct list_head lu_gp_mem_list;
241} ____cacheline_aligned;
242
243struct t10_alua_tg_pt_gp {
244 u16 tg_pt_gp_id;
245 int tg_pt_gp_valid_id;
246 int tg_pt_gp_alua_access_status;
247 int tg_pt_gp_alua_access_type;
248 int tg_pt_gp_nonop_delay_msecs;
249 int tg_pt_gp_trans_delay_msecs;
250 int tg_pt_gp_pref;
251 int tg_pt_gp_write_metadata;
252 /* Used by struct t10_alua_tg_pt_gp->tg_pt_gp_md_buf_len */
253#define ALUA_MD_BUF_LEN 1024
254 u32 tg_pt_gp_md_buf_len;
255 u32 tg_pt_gp_members;
256 atomic_t tg_pt_gp_alua_access_state;
257 atomic_t tg_pt_gp_ref_cnt;
258 spinlock_t tg_pt_gp_lock;
259 struct mutex tg_pt_gp_md_mutex;
260 struct se_subsystem_dev *tg_pt_gp_su_dev;
261 struct config_group tg_pt_gp_group;
262 struct list_head tg_pt_gp_list;
263 struct list_head tg_pt_gp_mem_list;
264} ____cacheline_aligned;
265
266struct t10_alua_tg_pt_gp_member {
267 bool tg_pt_gp_assoc;
268 atomic_t tg_pt_gp_mem_ref_cnt;
269 spinlock_t tg_pt_gp_mem_lock;
270 struct t10_alua_tg_pt_gp *tg_pt_gp;
271 struct se_port *tg_pt;
272 struct list_head tg_pt_gp_mem_list;
273} ____cacheline_aligned;
274
275struct t10_vpd {
276 unsigned char device_identifier[INQUIRY_VPD_DEVICE_IDENTIFIER_LEN];
277 int protocol_identifier_set;
278 u32 protocol_identifier;
279 u32 device_identifier_code_set;
280 u32 association;
281 u32 device_identifier_type;
282 struct list_head vpd_list;
283} ____cacheline_aligned;
284
285struct t10_wwn {
286 char vendor[8];
287 char model[16];
288 char revision[4];
289 char unit_serial[INQUIRY_VPD_SERIAL_LEN];
290 spinlock_t t10_vpd_lock;
291 struct se_subsystem_dev *t10_sub_dev;
292 struct config_group t10_wwn_group;
293 struct list_head t10_vpd_list;
294} ____cacheline_aligned;
295
296
297/*
298 * Used by TCM Core internally to signal if >= SPC-3 persistent reservations
299 * emulation is enabled or disabled, or running in with TCM/pSCSI passthrough
300 * mode
301 */
302typedef enum {
303 SPC_PASSTHROUGH,
304 SPC2_RESERVATIONS,
305 SPC3_PERSISTENT_RESERVATIONS
306} t10_reservations_index_t;
307
308struct t10_pr_registration {
309 /* Used for fabrics that contain WWN+ISID */
310#define PR_REG_ISID_LEN 16
311 /* PR_REG_ISID_LEN + ',i,0x' */
312#define PR_REG_ISID_ID_LEN (PR_REG_ISID_LEN + 5)
313 char pr_reg_isid[PR_REG_ISID_LEN];
314 /* Used during APTPL metadata reading */
315#define PR_APTPL_MAX_IPORT_LEN 256
316 unsigned char pr_iport[PR_APTPL_MAX_IPORT_LEN];
317 /* Used during APTPL metadata reading */
318#define PR_APTPL_MAX_TPORT_LEN 256
319 unsigned char pr_tport[PR_APTPL_MAX_TPORT_LEN];
320 /* For writing out live meta data */
321 unsigned char *pr_aptpl_buf;
322 u16 pr_aptpl_rpti;
323 u16 pr_reg_tpgt;
324 /* Reservation effects all target ports */
325 int pr_reg_all_tg_pt;
326 /* Activate Persistence across Target Power Loss */
327 int pr_reg_aptpl;
328 int pr_res_holder;
329 int pr_res_type;
330 int pr_res_scope;
331 /* Used for fabric initiator WWPNs using a ISID */
332 bool isid_present_at_reg;
333 u32 pr_res_mapped_lun;
334 u32 pr_aptpl_target_lun;
335 u32 pr_res_generation;
336 u64 pr_reg_bin_isid;
337 u64 pr_res_key;
338 atomic_t pr_res_holders;
339 struct se_node_acl *pr_reg_nacl;
340 struct se_dev_entry *pr_reg_deve;
341 struct se_lun *pr_reg_tg_pt_lun;
342 struct list_head pr_reg_list;
343 struct list_head pr_reg_abort_list;
344 struct list_head pr_reg_aptpl_list;
345 struct list_head pr_reg_atp_list;
346 struct list_head pr_reg_atp_mem_list;
347} ____cacheline_aligned;
348
349/*
350 * This set of function pointer ops is set based upon SPC3_PERSISTENT_RESERVATIONS,
351 * SPC2_RESERVATIONS or SPC_PASSTHROUGH in drivers/target/target_core_pr.c:
352 * core_setup_reservations()
353 */
354struct t10_reservation_ops {
355 int (*t10_reservation_check)(struct se_cmd *, u32 *);
356 int (*t10_seq_non_holder)(struct se_cmd *, unsigned char *, u32);
357 int (*t10_pr_register)(struct se_cmd *);
358 int (*t10_pr_clear)(struct se_cmd *);
359};
360
361struct t10_reservation {
362 /* Reservation effects all target ports */
363 int pr_all_tg_pt;
364 /* Activate Persistence across Target Power Loss enabled
365 * for SCSI device */
366 int pr_aptpl_active;
367 /* Used by struct t10_reservation->pr_aptpl_buf_len */
368#define PR_APTPL_BUF_LEN 8192
369 u32 pr_aptpl_buf_len;
370 u32 pr_generation;
371 t10_reservations_index_t res_type;
372 spinlock_t registration_lock;
373 spinlock_t aptpl_reg_lock;
374 /*
375 * This will always be set by one individual I_T Nexus.
376 * However with all_tg_pt=1, other I_T Nexus from the
377 * same initiator can access PR reg/res info on a different
378 * target port.
379 *
380 * There is also the 'All Registrants' case, where there is
381 * a single *pr_res_holder of the reservation, but all
382 * registrations are considered reservation holders.
383 */
384 struct se_node_acl *pr_res_holder;
385 struct list_head registration_list;
386 struct list_head aptpl_reg_list;
387 struct t10_reservation_ops pr_ops;
388} ____cacheline_aligned;
389
390struct se_queue_req {
391 int state;
392 struct se_cmd *cmd;
393 struct list_head qr_list;
394} ____cacheline_aligned;
395
396struct se_queue_obj {
397 atomic_t queue_cnt;
398 spinlock_t cmd_queue_lock;
399 struct list_head qobj_list;
400 wait_queue_head_t thread_wq;
401} ____cacheline_aligned;
402
403struct se_task {
404 unsigned char task_sense;
405 struct scatterlist *task_sg;
406 u32 task_sg_nents;
407 struct scatterlist *task_sg_bidi;
408 u8 task_scsi_status;
409 u8 task_flags;
410 int task_error_status;
411 int task_state_flags;
412 bool task_padded_sg;
413 unsigned long long task_lba;
414 u32 task_no;
415 u32 task_sectors;
416 u32 task_size;
417 enum dma_data_direction task_data_direction;
418 struct se_cmd *task_se_cmd;
419 struct se_device *se_dev;
420 struct completion task_stop_comp;
421 atomic_t task_active;
422 atomic_t task_execute_queue;
423 atomic_t task_timeout;
424 atomic_t task_sent;
425 atomic_t task_stop;
426 atomic_t task_state_active;
427 struct timer_list task_timer;
428 struct se_device *se_obj_ptr;
429 struct list_head t_list;
430 struct list_head t_execute_list;
431 struct list_head t_state_list;
432} ____cacheline_aligned;
433
434struct se_cmd {
435 /* SAM response code being sent to initiator */
436 u8 scsi_status;
437 u8 scsi_asc;
438 u8 scsi_ascq;
439 u8 scsi_sense_reason;
440 u16 scsi_sense_length;
441 /* Delay for ALUA Active/NonOptimized state access in milliseconds */
442 int alua_nonop_delay;
443 /* See include/linux/dma-mapping.h */
444 enum dma_data_direction data_direction;
445 /* For SAM Task Attribute */
446 int sam_task_attr;
447 /* Transport protocol dependent state, see transport_state_table */
448 enum transport_state_table t_state;
449 /* Transport protocol dependent state for out of order CmdSNs */
450 int deferred_t_state;
451 /* Transport specific error status */
452 int transport_error_status;
453 /* See se_cmd_flags_table */
454 u32 se_cmd_flags;
455 u32 se_ordered_id;
456 /* Total size in bytes associated with command */
457 u32 data_length;
458 /* SCSI Presented Data Transfer Length */
459 u32 cmd_spdtl;
460 u32 residual_count;
461 u32 orig_fe_lun;
462 /* Persistent Reservation key */
463 u64 pr_res_key;
464 atomic_t transport_sent;
465 /* Used for sense data */
466 void *sense_buffer;
467 struct list_head se_delayed_node;
468 struct list_head se_ordered_node;
469 struct list_head se_lun_node;
470 struct list_head se_qf_node;
471 struct se_device *se_dev;
472 struct se_dev_entry *se_deve;
473 struct se_device *se_obj_ptr;
474 struct se_device *se_orig_obj_ptr;
475 struct se_lun *se_lun;
476 /* Only used for internal passthrough and legacy TCM fabric modules */
477 struct se_session *se_sess;
478 struct se_tmr_req *se_tmr_req;
479 struct list_head se_queue_node;
480 struct target_core_fabric_ops *se_tfo;
481 int (*transport_emulate_cdb)(struct se_cmd *);
482 void (*transport_split_cdb)(unsigned long long, u32, unsigned char *);
483 void (*transport_wait_for_tasks)(struct se_cmd *, int, int);
484 void (*transport_complete_callback)(struct se_cmd *);
485 int (*transport_qf_callback)(struct se_cmd *);
486
487 unsigned char *t_task_cdb;
488 unsigned char __t_task_cdb[TCM_MAX_COMMAND_SIZE];
489 unsigned long long t_task_lba;
490 int t_tasks_failed;
491 int t_tasks_fua;
492 bool t_tasks_bidi;
493 u32 t_tasks_sg_chained_no;
494 atomic_t t_fe_count;
495 atomic_t t_se_count;
496 atomic_t t_task_cdbs_left;
497 atomic_t t_task_cdbs_ex_left;
498 atomic_t t_task_cdbs_timeout_left;
499 atomic_t t_task_cdbs_sent;
500 atomic_t t_transport_aborted;
501 atomic_t t_transport_active;
502 atomic_t t_transport_complete;
503 atomic_t t_transport_queue_active;
504 atomic_t t_transport_sent;
505 atomic_t t_transport_stop;
506 atomic_t t_transport_timeout;
507 atomic_t transport_dev_active;
508 atomic_t transport_lun_active;
509 atomic_t transport_lun_fe_stop;
510 atomic_t transport_lun_stop;
511 spinlock_t t_state_lock;
512 struct completion t_transport_stop_comp;
513 struct completion transport_lun_fe_stop_comp;
514 struct completion transport_lun_stop_comp;
515 struct scatterlist *t_tasks_sg_chained;
516
517 /*
518 * Used for pre-registered fabric SGL passthrough WRITE and READ
519 * with the special SCF_PASSTHROUGH_CONTIG_TO_SG case for TCM_Loop
520 * and other HW target mode fabric modules.
521 */
522 struct scatterlist *t_task_pt_sgl;
523 u32 t_task_pt_sgl_num;
524
525 struct scatterlist *t_data_sg;
526 unsigned int t_data_nents;
527 struct scatterlist *t_bidi_data_sg;
528 unsigned int t_bidi_data_nents;
529
530 /* Used for BIDI READ */
531 struct list_head t_task_list;
532 u32 t_task_list_num;
533
534} ____cacheline_aligned;
535
536struct se_tmr_req {
537 /* Task Management function to be preformed */
538 u8 function;
539 /* Task Management response to send */
540 u8 response;
541 int call_transport;
542 /* Reference to ITT that Task Mgmt should be preformed */
543 u32 ref_task_tag;
544 /* 64-bit encoded SAM LUN from $FABRIC_MOD TMR header */
545 u64 ref_task_lun;
546 void *fabric_tmr_ptr;
547 struct se_cmd *task_cmd;
548 struct se_cmd *ref_cmd;
549 struct se_device *tmr_dev;
550 struct se_lun *tmr_lun;
551 struct list_head tmr_list;
552} ____cacheline_aligned;
553
554struct se_ua {
555 u8 ua_asc;
556 u8 ua_ascq;
557 struct se_node_acl *ua_nacl;
558 struct list_head ua_dev_list;
559 struct list_head ua_nacl_list;
560} ____cacheline_aligned;
561
562struct se_node_acl {
563 char initiatorname[TRANSPORT_IQN_LEN];
564 /* Used to signal demo mode created ACL, disabled by default */
565 bool dynamic_node_acl;
566 u32 queue_depth;
567 u32 acl_index;
568 u64 num_cmds;
569 u64 read_bytes;
570 u64 write_bytes;
571 spinlock_t stats_lock;
572 /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
573 atomic_t acl_pr_ref_count;
574 struct se_dev_entry *device_list;
575 struct se_session *nacl_sess;
576 struct se_portal_group *se_tpg;
577 spinlock_t device_list_lock;
578 spinlock_t nacl_sess_lock;
579 struct config_group acl_group;
580 struct config_group acl_attrib_group;
581 struct config_group acl_auth_group;
582 struct config_group acl_param_group;
583 struct config_group acl_fabric_stat_group;
584 struct config_group *acl_default_groups[5];
585 struct list_head acl_list;
586 struct list_head acl_sess_list;
587} ____cacheline_aligned;
588
589struct se_session {
590 u64 sess_bin_isid;
591 struct se_node_acl *se_node_acl;
592 struct se_portal_group *se_tpg;
593 void *fabric_sess_ptr;
594 struct list_head sess_list;
595 struct list_head sess_acl_list;
596} ____cacheline_aligned;
597
598struct se_device;
599struct se_transform_info;
600struct scatterlist;
601
602struct se_ml_stat_grps {
603 struct config_group stat_group;
604 struct config_group scsi_auth_intr_group;
605 struct config_group scsi_att_intr_port_group;
606};
607
608struct se_lun_acl {
609 char initiatorname[TRANSPORT_IQN_LEN];
610 u32 mapped_lun;
611 struct se_node_acl *se_lun_nacl;
612 struct se_lun *se_lun;
613 struct list_head lacl_list;
614 struct config_group se_lun_group;
615 struct se_ml_stat_grps ml_stat_grps;
616} ____cacheline_aligned;
617
618struct se_dev_entry {
619 bool def_pr_registered;
620 /* See transport_lunflags_table */
621 u32 lun_flags;
622 u32 deve_cmds;
623 u32 mapped_lun;
624 u32 average_bytes;
625 u32 last_byte_count;
626 u32 total_cmds;
627 u32 total_bytes;
628 u64 pr_res_key;
629 u64 creation_time;
630 u32 attach_count;
631 u64 read_bytes;
632 u64 write_bytes;
633 atomic_t ua_count;
634 /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
635 atomic_t pr_ref_count;
636 struct se_lun_acl *se_lun_acl;
637 spinlock_t ua_lock;
638 struct se_lun *se_lun;
639 struct list_head alua_port_list;
640 struct list_head ua_list;
641} ____cacheline_aligned;
642
643struct se_dev_limits {
644 /* Max supported HW queue depth */
645 u32 hw_queue_depth;
646 /* Max supported virtual queue depth */
647 u32 queue_depth;
648 /* From include/linux/blkdev.h for the other HW/SW limits. */
649 struct queue_limits limits;
650} ____cacheline_aligned;
651
652struct se_dev_attrib {
653 int emulate_dpo;
654 int emulate_fua_write;
655 int emulate_fua_read;
656 int emulate_write_cache;
657 int emulate_ua_intlck_ctrl;
658 int emulate_tas;
659 int emulate_tpu;
660 int emulate_tpws;
661 int emulate_reservations;
662 int emulate_alua;
663 int enforce_pr_isids;
664 int is_nonrot;
665 int emulate_rest_reord;
666 u32 hw_block_size;
667 u32 block_size;
668 u32 hw_max_sectors;
669 u32 max_sectors;
670 u32 optimal_sectors;
671 u32 hw_queue_depth;
672 u32 queue_depth;
673 u32 task_timeout;
674 u32 max_unmap_lba_count;
675 u32 max_unmap_block_desc_count;
676 u32 unmap_granularity;
677 u32 unmap_granularity_alignment;
678 struct se_subsystem_dev *da_sub_dev;
679 struct config_group da_group;
680} ____cacheline_aligned;
681
682struct se_dev_stat_grps {
683 struct config_group stat_group;
684 struct config_group scsi_dev_group;
685 struct config_group scsi_tgt_dev_group;
686 struct config_group scsi_lu_group;
687};
688
689struct se_subsystem_dev {
690/* Used for struct se_subsystem_dev-->se_dev_alias, must be less than PAGE_SIZE */
691#define SE_DEV_ALIAS_LEN 512
692 unsigned char se_dev_alias[SE_DEV_ALIAS_LEN];
693/* Used for struct se_subsystem_dev->se_dev_udev_path[], must be less than PAGE_SIZE */
694#define SE_UDEV_PATH_LEN 512
695 unsigned char se_dev_udev_path[SE_UDEV_PATH_LEN];
696 u32 su_dev_flags;
697 struct se_hba *se_dev_hba;
698 struct se_device *se_dev_ptr;
699 struct se_dev_attrib se_dev_attrib;
700 /* T10 Asymmetric Logical Unit Assignment for Target Ports */
701 struct t10_alua t10_alua;
702 /* T10 Inquiry and VPD WWN Information */
703 struct t10_wwn t10_wwn;
704 /* T10 SPC-2 + SPC-3 Reservations */
705 struct t10_reservation t10_pr;
706 spinlock_t se_dev_lock;
707 void *se_dev_su_ptr;
708 struct list_head se_dev_node;
709 struct config_group se_dev_group;
710 /* For T10 Reservations */
711 struct config_group se_dev_pr_group;
712 /* For target_core_stat.c groups */
713 struct se_dev_stat_grps dev_stat_grps;
714} ____cacheline_aligned;
715
716struct se_device {
717 /* Set to 1 if thread is NOT sleeping on thread_sem */
718 u8 thread_active;
719 u8 dev_status_timer_flags;
720 /* RELATIVE TARGET PORT IDENTIFER Counter */
721 u16 dev_rpti_counter;
722 /* Used for SAM Task Attribute ordering */
723 u32 dev_cur_ordered_id;
724 u32 dev_flags;
725 u32 dev_port_count;
726 /* See transport_device_status_table */
727 u32 dev_status;
728 u32 dev_tcq_window_closed;
729 /* Physical device queue depth */
730 u32 queue_depth;
731 /* Used for SPC-2 reservations enforce of ISIDs */
732 u64 dev_res_bin_isid;
733 t10_task_attr_index_t dev_task_attr_type;
734 /* Pointer to transport specific device structure */
735 void *dev_ptr;
736 u32 dev_index;
737 u64 creation_time;
738 u32 num_resets;
739 u64 num_cmds;
740 u64 read_bytes;
741 u64 write_bytes;
742 spinlock_t stats_lock;
743 /* Active commands on this virtual SE device */
744 atomic_t active_cmds;
745 atomic_t simple_cmds;
746 atomic_t depth_left;
747 atomic_t dev_ordered_id;
748 atomic_t dev_tur_active;
749 atomic_t execute_tasks;
750 atomic_t dev_status_thr_count;
751 atomic_t dev_hoq_count;
752 atomic_t dev_ordered_sync;
753 atomic_t dev_qf_count;
754 struct se_obj dev_obj;
755 struct se_obj dev_access_obj;
756 struct se_obj dev_export_obj;
757 struct se_queue_obj dev_queue_obj;
758 spinlock_t delayed_cmd_lock;
759 spinlock_t ordered_cmd_lock;
760 spinlock_t execute_task_lock;
761 spinlock_t state_task_lock;
762 spinlock_t dev_alua_lock;
763 spinlock_t dev_reservation_lock;
764 spinlock_t dev_state_lock;
765 spinlock_t dev_status_lock;
766 spinlock_t dev_status_thr_lock;
767 spinlock_t se_port_lock;
768 spinlock_t se_tmr_lock;
769 spinlock_t qf_cmd_lock;
770 /* Used for legacy SPC-2 reservationsa */
771 struct se_node_acl *dev_reserved_node_acl;
772 /* Used for ALUA Logical Unit Group membership */
773 struct t10_alua_lu_gp_member *dev_alua_lu_gp_mem;
774 /* Used for SPC-3 Persistent Reservations */
775 struct t10_pr_registration *dev_pr_res_holder;
776 struct list_head dev_sep_list;
777 struct list_head dev_tmr_list;
778 struct timer_list dev_status_timer;
779 /* Pointer to descriptor for processing thread */
780 struct task_struct *process_thread;
781 pid_t process_thread_pid;
782 struct task_struct *dev_mgmt_thread;
783 struct work_struct qf_work_queue;
784 struct list_head delayed_cmd_list;
785 struct list_head ordered_cmd_list;
786 struct list_head execute_task_list;
787 struct list_head state_task_list;
788 struct list_head qf_cmd_list;
789 /* Pointer to associated SE HBA */
790 struct se_hba *se_hba;
791 struct se_subsystem_dev *se_sub_dev;
792 /* Pointer to template of function pointers for transport */
793 struct se_subsystem_api *transport;
794 /* Linked list for struct se_hba struct se_device list */
795 struct list_head dev_list;
796 /* Linked list for struct se_global->g_se_dev_list */
797 struct list_head g_se_dev_list;
798} ____cacheline_aligned;
799
800struct se_hba {
801 u16 hba_tpgt;
802 u32 hba_id;
803 /* See hba_flags_table */
804 u32 hba_flags;
805 /* Virtual iSCSI devices attached. */
806 u32 dev_count;
807 u32 hba_index;
808 /* Pointer to transport specific host structure. */
809 void *hba_ptr;
810 /* Linked list for struct se_device */
811 struct list_head hba_dev_list;
812 struct list_head hba_node;
813 spinlock_t device_lock;
814 struct config_group hba_group;
815 struct mutex hba_access_mutex;
816 struct se_subsystem_api *transport;
817} ____cacheline_aligned;
818
819struct se_port_stat_grps {
820 struct config_group stat_group;
821 struct config_group scsi_port_group;
822 struct config_group scsi_tgt_port_group;
823 struct config_group scsi_transport_group;
824};
825
826struct se_lun {
827 /* See transport_lun_status_table */
828 enum transport_lun_status_table lun_status;
829 u32 lun_access;
830 u32 lun_flags;
831 u32 unpacked_lun;
832 atomic_t lun_acl_count;
833 spinlock_t lun_acl_lock;
834 spinlock_t lun_cmd_lock;
835 spinlock_t lun_sep_lock;
836 struct completion lun_shutdown_comp;
837 struct list_head lun_cmd_list;
838 struct list_head lun_acl_list;
839 struct se_device *lun_se_dev;
840 struct se_port *lun_sep;
841 struct config_group lun_group;
842 struct se_port_stat_grps port_stat_grps;
843} ____cacheline_aligned;
844
845struct scsi_port_stats {
846 u64 cmd_pdus;
847 u64 tx_data_octets;
848 u64 rx_data_octets;
849} ____cacheline_aligned;
850
851struct se_port {
852 /* RELATIVE TARGET PORT IDENTIFER */
853 u16 sep_rtpi;
854 int sep_tg_pt_secondary_stat;
855 int sep_tg_pt_secondary_write_md;
856 u32 sep_index;
857 struct scsi_port_stats sep_stats;
858 /* Used for ALUA Target Port Groups membership */
859 atomic_t sep_tg_pt_gp_active;
860 atomic_t sep_tg_pt_secondary_offline;
861 /* Used for PR ALL_TG_PT=1 */
862 atomic_t sep_tg_pt_ref_cnt;
863 spinlock_t sep_alua_lock;
864 struct mutex sep_tg_pt_md_mutex;
865 struct t10_alua_tg_pt_gp_member *sep_alua_tg_pt_gp_mem;
866 struct se_lun *sep_lun;
867 struct se_portal_group *sep_tpg;
868 struct list_head sep_alua_list;
869 struct list_head sep_list;
870} ____cacheline_aligned;
871
872struct se_tpg_np {
873 struct se_portal_group *tpg_np_parent;
874 struct config_group tpg_np_group;
875} ____cacheline_aligned;
876
877struct se_portal_group {
878 /* Type of target portal group, see transport_tpg_type_table */
879 enum transport_tpg_type_table se_tpg_type;
880 /* Number of ACLed Initiator Nodes for this TPG */
881 u32 num_node_acls;
882 /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
883 atomic_t tpg_pr_ref_count;
884 /* Spinlock for adding/removing ACLed Nodes */
885 spinlock_t acl_node_lock;
886 /* Spinlock for adding/removing sessions */
887 spinlock_t session_lock;
888 spinlock_t tpg_lun_lock;
889 /* Pointer to $FABRIC_MOD portal group */
890 void *se_tpg_fabric_ptr;
891 struct list_head se_tpg_node;
892 /* linked list for initiator ACL list */
893 struct list_head acl_node_list;
894 struct se_lun *tpg_lun_list;
895 struct se_lun tpg_virt_lun0;
896 /* List of TCM sessions associated wth this TPG */
897 struct list_head tpg_sess_list;
898 /* Pointer to $FABRIC_MOD dependent code */
899 struct target_core_fabric_ops *se_tpg_tfo;
900 struct se_wwn *se_tpg_wwn;
901 struct config_group tpg_group;
902 struct config_group *tpg_default_groups[6];
903 struct config_group tpg_lun_group;
904 struct config_group tpg_np_group;
905 struct config_group tpg_acl_group;
906 struct config_group tpg_attrib_group;
907 struct config_group tpg_param_group;
908} ____cacheline_aligned;
909
910struct se_wwn {
911 struct target_fabric_configfs *wwn_tf;
912 struct config_group wwn_group;
913 struct config_group *wwn_default_groups[2];
914 struct config_group fabric_stat_group;
915} ____cacheline_aligned;
916
917#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/sbitmap.h>
8#include <linux/percpu-refcount.h>
9#include <linux/semaphore.h> /* struct semaphore */
10#include <linux/completion.h>
11
12#define TARGET_CORE_VERSION "v5.0"
13
14/*
15 * Maximum size of a CDB that can be stored in se_cmd without allocating
16 * memory dynamically for the CDB.
17 */
18#define TCM_MAX_COMMAND_SIZE 32
19/*
20 * From include/scsi/scsi_cmnd.h:SCSI_SENSE_BUFFERSIZE, currently
21 * defined 96, but the real limit is 252 (or 260 including the header)
22 */
23#define TRANSPORT_SENSE_BUFFER 96
24/* Used by transport_send_check_condition_and_sense() */
25#define SPC_SENSE_KEY_OFFSET 2
26#define SPC_ADD_SENSE_LEN_OFFSET 7
27#define SPC_DESC_TYPE_OFFSET 8
28#define SPC_ADDITIONAL_DESC_LEN_OFFSET 9
29#define SPC_VALIDITY_OFFSET 10
30#define SPC_ASC_KEY_OFFSET 12
31#define SPC_ASCQ_KEY_OFFSET 13
32#define TRANSPORT_IQN_LEN 224
33/* Used by target_core_store_alua_lu_gp() and target_core_alua_lu_gp_show_attr_members() */
34#define LU_GROUP_NAME_BUF 256
35/* Used by core_alua_store_tg_pt_gp_info() and target_core_alua_tg_pt_gp_show_attr_members() */
36#define TG_PT_GROUP_NAME_BUF 256
37/* Used to parse VPD into struct t10_vpd */
38#define VPD_TMP_BUF_SIZE 254
39/* Used by transport_generic_cmd_sequencer() */
40#define READ_BLOCK_LEN 6
41#define READ_CAP_LEN 8
42#define READ_POSITION_LEN 20
43#define INQUIRY_LEN 36
44/* Used by transport_get_inquiry_vpd_serial() */
45#define INQUIRY_VPD_SERIAL_LEN 254
46/* Used by transport_get_inquiry_vpd_device_ident() */
47#define INQUIRY_VPD_DEVICE_IDENTIFIER_LEN 254
48
49#define INQUIRY_VENDOR_LEN 8
50#define INQUIRY_MODEL_LEN 16
51#define INQUIRY_REVISION_LEN 4
52
53/* Attempts before moving from SHORT to LONG */
54#define PYX_TRANSPORT_WINDOW_CLOSED_THRESHOLD 3
55#define PYX_TRANSPORT_WINDOW_CLOSED_WAIT_SHORT 3 /* In milliseconds */
56#define PYX_TRANSPORT_WINDOW_CLOSED_WAIT_LONG 10 /* In milliseconds */
57
58#define PYX_TRANSPORT_STATUS_INTERVAL 5 /* In seconds */
59
60/* struct se_dev_attrib sanity values */
61/* Default max_unmap_lba_count */
62#define DA_MAX_UNMAP_LBA_COUNT 0
63/* Default max_unmap_block_desc_count */
64#define DA_MAX_UNMAP_BLOCK_DESC_COUNT 0
65/* Default unmap_granularity */
66#define DA_UNMAP_GRANULARITY_DEFAULT 0
67/* Default unmap_granularity_alignment */
68#define DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT 0
69/* Default unmap_zeroes_data */
70#define DA_UNMAP_ZEROES_DATA_DEFAULT 0
71/* Default max_write_same_len, disabled by default */
72#define DA_MAX_WRITE_SAME_LEN 0
73/* Use a model alias based on the configfs backend device name */
74#define DA_EMULATE_MODEL_ALIAS 0
75/* Emulation for WriteCache and SYNCHRONIZE_CACHE */
76#define DA_EMULATE_WRITE_CACHE 0
77/* Emulation for UNIT ATTENTION Interlock Control */
78#define DA_EMULATE_UA_INTLLCK_CTRL 0
79/* Emulation for TASK_ABORTED status (TAS) by default */
80#define DA_EMULATE_TAS 1
81/* Emulation for Thin Provisioning UNMAP using block/blk-lib.c:blkdev_issue_discard() */
82#define DA_EMULATE_TPU 0
83/*
84 * Emulation for Thin Provisioning WRITE_SAME w/ UNMAP=1 bit using
85 * block/blk-lib.c:blkdev_issue_discard()
86 */
87#define DA_EMULATE_TPWS 0
88/* Emulation for CompareAndWrite (AtomicTestandSet) by default */
89#define DA_EMULATE_CAW 1
90/* Emulation for 3rd Party Copy (ExtendedCopy) by default */
91#define DA_EMULATE_3PC 1
92/* No Emulation for PSCSI by default */
93#define DA_EMULATE_ALUA 0
94/* Emulate SCSI2 RESERVE/RELEASE and Persistent Reservations by default */
95#define DA_EMULATE_PR 1
96/* Enforce SCSI Initiator Port TransportID with 'ISID' for PR */
97#define DA_ENFORCE_PR_ISIDS 1
98/* Force SPC-3 PR Activate Persistence across Target Power Loss */
99#define DA_FORCE_PR_APTPL 0
100#define DA_STATUS_MAX_SECTORS_MIN 16
101#define DA_STATUS_MAX_SECTORS_MAX 8192
102/* By default don't report non-rotating (solid state) medium */
103#define DA_IS_NONROT 0
104/* Queue Algorithm Modifier default for restricted reordering in control mode page */
105#define DA_EMULATE_REST_REORD 0
106
107#define SE_INQUIRY_BUF 1024
108#define SE_MODE_PAGE_BUF 512
109#define SE_SENSE_BUF 96
110
111/* struct se_hba->hba_flags */
112enum hba_flags_table {
113 HBA_FLAGS_INTERNAL_USE = 0x01,
114 HBA_FLAGS_PSCSI_MODE = 0x02,
115};
116
117/* Special transport agnostic struct se_cmd->t_states */
118enum transport_state_table {
119 TRANSPORT_NO_STATE = 0,
120 TRANSPORT_NEW_CMD = 1,
121 TRANSPORT_WRITE_PENDING = 3,
122 TRANSPORT_PROCESSING = 5,
123 TRANSPORT_COMPLETE = 6,
124 TRANSPORT_ISTATE_PROCESSING = 11,
125 TRANSPORT_COMPLETE_QF_WP = 18,
126 TRANSPORT_COMPLETE_QF_OK = 19,
127 TRANSPORT_COMPLETE_QF_ERR = 20,
128};
129
130/* Used for struct se_cmd->se_cmd_flags */
131enum se_cmd_flags_table {
132 SCF_SUPPORTED_SAM_OPCODE = 0x00000001,
133 SCF_TRANSPORT_TASK_SENSE = 0x00000002,
134 SCF_EMULATED_TASK_SENSE = 0x00000004,
135 SCF_SCSI_DATA_CDB = 0x00000008,
136 SCF_SCSI_TMR_CDB = 0x00000010,
137 SCF_FUA = 0x00000080,
138 SCF_SE_LUN_CMD = 0x00000100,
139 SCF_BIDI = 0x00000400,
140 SCF_SENT_CHECK_CONDITION = 0x00000800,
141 SCF_OVERFLOW_BIT = 0x00001000,
142 SCF_UNDERFLOW_BIT = 0x00002000,
143 SCF_ALUA_NON_OPTIMIZED = 0x00008000,
144 SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC = 0x00020000,
145 SCF_COMPARE_AND_WRITE = 0x00080000,
146 SCF_PASSTHROUGH_PROT_SG_TO_MEM_NOALLOC = 0x00200000,
147 SCF_ACK_KREF = 0x00400000,
148 SCF_USE_CPUID = 0x00800000,
149 SCF_TASK_ATTR_SET = 0x01000000,
150 SCF_TREAT_READ_AS_NORMAL = 0x02000000,
151};
152
153/*
154 * Used by transport_send_check_condition_and_sense()
155 * to signal which ASC/ASCQ sense payload should be built.
156 */
157typedef unsigned __bitwise sense_reason_t;
158
159enum tcm_sense_reason_table {
160#define R(x) (__force sense_reason_t )(x)
161 TCM_NO_SENSE = R(0x00),
162 TCM_NON_EXISTENT_LUN = R(0x01),
163 TCM_UNSUPPORTED_SCSI_OPCODE = R(0x02),
164 TCM_INCORRECT_AMOUNT_OF_DATA = R(0x03),
165 TCM_UNEXPECTED_UNSOLICITED_DATA = R(0x04),
166 TCM_SERVICE_CRC_ERROR = R(0x05),
167 TCM_SNACK_REJECTED = R(0x06),
168 TCM_SECTOR_COUNT_TOO_MANY = R(0x07),
169 TCM_INVALID_CDB_FIELD = R(0x08),
170 TCM_INVALID_PARAMETER_LIST = R(0x09),
171 TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE = R(0x0a),
172 TCM_UNKNOWN_MODE_PAGE = R(0x0b),
173 TCM_WRITE_PROTECTED = R(0x0c),
174 TCM_CHECK_CONDITION_ABORT_CMD = R(0x0d),
175 TCM_CHECK_CONDITION_UNIT_ATTENTION = R(0x0e),
176 TCM_CHECK_CONDITION_NOT_READY = R(0x0f),
177 TCM_RESERVATION_CONFLICT = R(0x10),
178 TCM_ADDRESS_OUT_OF_RANGE = R(0x11),
179 TCM_OUT_OF_RESOURCES = R(0x12),
180 TCM_PARAMETER_LIST_LENGTH_ERROR = R(0x13),
181 TCM_MISCOMPARE_VERIFY = R(0x14),
182 TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED = R(0x15),
183 TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED = R(0x16),
184 TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED = R(0x17),
185 TCM_COPY_TARGET_DEVICE_NOT_REACHABLE = R(0x18),
186 TCM_TOO_MANY_TARGET_DESCS = R(0x19),
187 TCM_UNSUPPORTED_TARGET_DESC_TYPE_CODE = R(0x1a),
188 TCM_TOO_MANY_SEGMENT_DESCS = R(0x1b),
189 TCM_UNSUPPORTED_SEGMENT_DESC_TYPE_CODE = R(0x1c),
190 TCM_INSUFFICIENT_REGISTRATION_RESOURCES = R(0x1d),
191 TCM_LUN_BUSY = R(0x1e),
192#undef R
193};
194
195enum target_sc_flags_table {
196 TARGET_SCF_BIDI_OP = 0x01,
197 TARGET_SCF_ACK_KREF = 0x02,
198 TARGET_SCF_UNKNOWN_SIZE = 0x04,
199 TARGET_SCF_USE_CPUID = 0x08,
200 TARGET_SCF_LOOKUP_LUN_FROM_TAG = 0x10,
201};
202
203/* fabric independent task management function values */
204enum tcm_tmreq_table {
205 TMR_ABORT_TASK = 1,
206 TMR_ABORT_TASK_SET = 2,
207 TMR_CLEAR_ACA = 3,
208 TMR_CLEAR_TASK_SET = 4,
209 TMR_LUN_RESET = 5,
210 TMR_TARGET_WARM_RESET = 6,
211 TMR_TARGET_COLD_RESET = 7,
212 TMR_UNKNOWN = 0xff,
213};
214
215/* fabric independent task management response values */
216enum tcm_tmrsp_table {
217 TMR_FUNCTION_FAILED = 0,
218 TMR_FUNCTION_COMPLETE = 1,
219 TMR_TASK_DOES_NOT_EXIST = 2,
220 TMR_LUN_DOES_NOT_EXIST = 3,
221 TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED = 4,
222 TMR_FUNCTION_REJECTED = 5,
223};
224
225/*
226 * Used for target SCSI statistics
227 */
228typedef enum {
229 SCSI_INST_INDEX,
230 SCSI_AUTH_INTR_INDEX,
231 SCSI_INDEX_TYPE_MAX
232} scsi_index_t;
233
234struct se_cmd;
235
236struct t10_alua_lba_map_member {
237 struct list_head lba_map_mem_list;
238 int lba_map_mem_alua_state;
239 int lba_map_mem_alua_pg_id;
240};
241
242struct t10_alua_lba_map {
243 u64 lba_map_first_lba;
244 u64 lba_map_last_lba;
245 struct list_head lba_map_list;
246 struct list_head lba_map_mem_list;
247};
248
249struct t10_alua {
250 /* ALUA Target Port Group ID */
251 u16 alua_tg_pt_gps_counter;
252 u32 alua_tg_pt_gps_count;
253 /* Referrals support */
254 spinlock_t lba_map_lock;
255 u32 lba_map_segment_size;
256 u32 lba_map_segment_multiplier;
257 struct list_head lba_map_list;
258 spinlock_t tg_pt_gps_lock;
259 struct se_device *t10_dev;
260 /* Used for default ALUA Target Port Group */
261 struct t10_alua_tg_pt_gp *default_tg_pt_gp;
262 /* Used for default ALUA Target Port Group ConfigFS group */
263 struct config_group alua_tg_pt_gps_group;
264 struct list_head tg_pt_gps_list;
265};
266
267struct t10_alua_lu_gp {
268 u16 lu_gp_id;
269 int lu_gp_valid_id;
270 u32 lu_gp_members;
271 atomic_t lu_gp_ref_cnt;
272 spinlock_t lu_gp_lock;
273 struct config_group lu_gp_group;
274 struct list_head lu_gp_node;
275 struct list_head lu_gp_mem_list;
276};
277
278struct t10_alua_lu_gp_member {
279 bool lu_gp_assoc;
280 atomic_t lu_gp_mem_ref_cnt;
281 spinlock_t lu_gp_mem_lock;
282 struct t10_alua_lu_gp *lu_gp;
283 struct se_device *lu_gp_mem_dev;
284 struct list_head lu_gp_mem_list;
285};
286
287struct t10_alua_tg_pt_gp {
288 u16 tg_pt_gp_id;
289 int tg_pt_gp_valid_id;
290 int tg_pt_gp_alua_supported_states;
291 int tg_pt_gp_alua_access_status;
292 int tg_pt_gp_alua_access_type;
293 int tg_pt_gp_nonop_delay_msecs;
294 int tg_pt_gp_trans_delay_msecs;
295 int tg_pt_gp_implicit_trans_secs;
296 int tg_pt_gp_pref;
297 int tg_pt_gp_write_metadata;
298 u32 tg_pt_gp_members;
299 int tg_pt_gp_alua_access_state;
300 atomic_t tg_pt_gp_ref_cnt;
301 spinlock_t tg_pt_gp_lock;
302 struct mutex tg_pt_gp_transition_mutex;
303 struct se_device *tg_pt_gp_dev;
304 struct config_group tg_pt_gp_group;
305 struct list_head tg_pt_gp_list;
306 struct list_head tg_pt_gp_lun_list;
307 struct se_lun *tg_pt_gp_alua_lun;
308 struct se_node_acl *tg_pt_gp_alua_nacl;
309};
310
311struct t10_vpd {
312 unsigned char device_identifier[INQUIRY_VPD_DEVICE_IDENTIFIER_LEN];
313 int protocol_identifier_set;
314 u32 protocol_identifier;
315 u32 device_identifier_code_set;
316 u32 association;
317 u32 device_identifier_type;
318 struct list_head vpd_list;
319};
320
321struct t10_wwn {
322 /*
323 * SCSI left aligned strings may not be null terminated. +1 to ensure a
324 * null terminator is always present.
325 */
326 char vendor[INQUIRY_VENDOR_LEN + 1];
327 char model[INQUIRY_MODEL_LEN + 1];
328 char revision[INQUIRY_REVISION_LEN + 1];
329 char unit_serial[INQUIRY_VPD_SERIAL_LEN];
330 spinlock_t t10_vpd_lock;
331 struct se_device *t10_dev;
332 struct config_group t10_wwn_group;
333 struct list_head t10_vpd_list;
334};
335
336struct t10_pr_registration {
337 /* Used for fabrics that contain WWN+ISID */
338#define PR_REG_ISID_LEN 16
339 /* PR_REG_ISID_LEN + ',i,0x' */
340#define PR_REG_ISID_ID_LEN (PR_REG_ISID_LEN + 5)
341 char pr_reg_isid[PR_REG_ISID_LEN];
342 /* Used during APTPL metadata reading */
343#define PR_APTPL_MAX_IPORT_LEN 256
344 unsigned char pr_iport[PR_APTPL_MAX_IPORT_LEN];
345 /* Used during APTPL metadata reading */
346#define PR_APTPL_MAX_TPORT_LEN 256
347 unsigned char pr_tport[PR_APTPL_MAX_TPORT_LEN];
348 u16 pr_aptpl_rpti;
349 u16 pr_reg_tpgt;
350 /* Reservation effects all target ports */
351 int pr_reg_all_tg_pt;
352 /* Activate Persistence across Target Power Loss */
353 int pr_reg_aptpl;
354 int pr_res_holder;
355 int pr_res_type;
356 int pr_res_scope;
357 /* Used for fabric initiator WWPNs using a ISID */
358 bool isid_present_at_reg;
359 u64 pr_res_mapped_lun;
360 u64 pr_aptpl_target_lun;
361 u16 tg_pt_sep_rtpi;
362 u32 pr_res_generation;
363 u64 pr_reg_bin_isid;
364 u64 pr_res_key;
365 atomic_t pr_res_holders;
366 struct se_node_acl *pr_reg_nacl;
367 /* Used by ALL_TG_PT=1 registration with deve->pr_ref taken */
368 struct se_dev_entry *pr_reg_deve;
369 struct list_head pr_reg_list;
370 struct list_head pr_reg_abort_list;
371 struct list_head pr_reg_aptpl_list;
372 struct list_head pr_reg_atp_list;
373 struct list_head pr_reg_atp_mem_list;
374};
375
376struct t10_reservation {
377 /* Reservation effects all target ports */
378 int pr_all_tg_pt;
379 /* Activate Persistence across Target Power Loss enabled
380 * for SCSI device */
381 int pr_aptpl_active;
382#define PR_APTPL_BUF_LEN 262144
383 u32 pr_generation;
384 spinlock_t registration_lock;
385 spinlock_t aptpl_reg_lock;
386 /*
387 * This will always be set by one individual I_T Nexus.
388 * However with all_tg_pt=1, other I_T Nexus from the
389 * same initiator can access PR reg/res info on a different
390 * target port.
391 *
392 * There is also the 'All Registrants' case, where there is
393 * a single *pr_res_holder of the reservation, but all
394 * registrations are considered reservation holders.
395 */
396 struct se_node_acl *pr_res_holder;
397 struct list_head registration_list;
398 struct list_head aptpl_reg_list;
399};
400
401struct se_tmr_req {
402 /* Task Management function to be performed */
403 u8 function;
404 /* Task Management response to send */
405 u8 response;
406 int call_transport;
407 /* Reference to ITT that Task Mgmt should be performed */
408 u64 ref_task_tag;
409 void *fabric_tmr_ptr;
410 struct se_cmd *task_cmd;
411 struct se_device *tmr_dev;
412 struct list_head tmr_list;
413};
414
415enum target_prot_op {
416 TARGET_PROT_NORMAL = 0,
417 TARGET_PROT_DIN_INSERT = (1 << 0),
418 TARGET_PROT_DOUT_INSERT = (1 << 1),
419 TARGET_PROT_DIN_STRIP = (1 << 2),
420 TARGET_PROT_DOUT_STRIP = (1 << 3),
421 TARGET_PROT_DIN_PASS = (1 << 4),
422 TARGET_PROT_DOUT_PASS = (1 << 5),
423};
424
425#define TARGET_PROT_ALL TARGET_PROT_DIN_INSERT | TARGET_PROT_DOUT_INSERT | \
426 TARGET_PROT_DIN_STRIP | TARGET_PROT_DOUT_STRIP | \
427 TARGET_PROT_DIN_PASS | TARGET_PROT_DOUT_PASS
428
429enum target_prot_type {
430 TARGET_DIF_TYPE0_PROT,
431 TARGET_DIF_TYPE1_PROT,
432 TARGET_DIF_TYPE2_PROT,
433 TARGET_DIF_TYPE3_PROT,
434};
435
436enum target_core_dif_check {
437 TARGET_DIF_CHECK_GUARD = 0x1 << 0,
438 TARGET_DIF_CHECK_APPTAG = 0x1 << 1,
439 TARGET_DIF_CHECK_REFTAG = 0x1 << 2,
440};
441
442/* for sam_task_attr */
443#define TCM_SIMPLE_TAG 0x20
444#define TCM_HEAD_TAG 0x21
445#define TCM_ORDERED_TAG 0x22
446#define TCM_ACA_TAG 0x24
447
448struct se_cmd {
449 /* SAM response code being sent to initiator */
450 u8 scsi_status;
451 u8 scsi_asc;
452 u8 scsi_ascq;
453 u16 scsi_sense_length;
454 unsigned unknown_data_length:1;
455 bool state_active:1;
456 u64 tag; /* SAM command identifier aka task tag */
457 /* Delay for ALUA Active/NonOptimized state access in milliseconds */
458 int alua_nonop_delay;
459 /* See include/linux/dma-mapping.h */
460 enum dma_data_direction data_direction;
461 /* For SAM Task Attribute */
462 int sam_task_attr;
463 /* Used for se_sess->sess_tag_pool */
464 unsigned int map_tag;
465 int map_cpu;
466 /* Transport protocol dependent state, see transport_state_table */
467 enum transport_state_table t_state;
468 /* See se_cmd_flags_table */
469 u32 se_cmd_flags;
470 /* Total size in bytes associated with command */
471 u32 data_length;
472 u32 residual_count;
473 u64 orig_fe_lun;
474 /* Persistent Reservation key */
475 u64 pr_res_key;
476 /* Used for sense data */
477 void *sense_buffer;
478 struct list_head se_delayed_node;
479 struct list_head se_qf_node;
480 struct se_device *se_dev;
481 struct se_lun *se_lun;
482 /* Only used for internal passthrough and legacy TCM fabric modules */
483 struct se_session *se_sess;
484 struct se_tmr_req *se_tmr_req;
485 struct list_head se_cmd_list;
486 struct completion *free_compl;
487 struct completion *abrt_compl;
488 const struct target_core_fabric_ops *se_tfo;
489 sense_reason_t (*execute_cmd)(struct se_cmd *);
490 sense_reason_t (*transport_complete_callback)(struct se_cmd *, bool, int *);
491 void *protocol_data;
492
493 unsigned char *t_task_cdb;
494 unsigned char __t_task_cdb[TCM_MAX_COMMAND_SIZE];
495 unsigned long long t_task_lba;
496 unsigned int t_task_nolb;
497 unsigned int transport_state;
498#define CMD_T_ABORTED (1 << 0)
499#define CMD_T_ACTIVE (1 << 1)
500#define CMD_T_COMPLETE (1 << 2)
501#define CMD_T_SENT (1 << 4)
502#define CMD_T_STOP (1 << 5)
503#define CMD_T_TAS (1 << 10)
504#define CMD_T_FABRIC_STOP (1 << 11)
505 spinlock_t t_state_lock;
506 struct kref cmd_kref;
507 struct completion t_transport_stop_comp;
508
509 struct work_struct work;
510
511 struct scatterlist *t_data_sg;
512 struct scatterlist *t_data_sg_orig;
513 unsigned int t_data_nents;
514 unsigned int t_data_nents_orig;
515 void *t_data_vmap;
516 struct scatterlist *t_bidi_data_sg;
517 unsigned int t_bidi_data_nents;
518
519 /* Used for lun->lun_ref counting */
520 int lun_ref_active;
521
522 struct list_head state_list;
523
524 /* backend private data */
525 void *priv;
526
527 /* DIF related members */
528 enum target_prot_op prot_op;
529 enum target_prot_type prot_type;
530 u8 prot_checks;
531 bool prot_pto;
532 u32 prot_length;
533 u32 reftag_seed;
534 struct scatterlist *t_prot_sg;
535 unsigned int t_prot_nents;
536 sense_reason_t pi_err;
537 sector_t bad_sector;
538 int cpuid;
539};
540
541struct se_ua {
542 u8 ua_asc;
543 u8 ua_ascq;
544 struct list_head ua_nacl_list;
545};
546
547struct se_node_acl {
548 char initiatorname[TRANSPORT_IQN_LEN];
549 /* Used to signal demo mode created ACL, disabled by default */
550 bool dynamic_node_acl;
551 bool dynamic_stop;
552 u32 queue_depth;
553 u32 acl_index;
554 enum target_prot_type saved_prot_type;
555#define MAX_ACL_TAG_SIZE 64
556 char acl_tag[MAX_ACL_TAG_SIZE];
557 /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
558 atomic_t acl_pr_ref_count;
559 struct hlist_head lun_entry_hlist;
560 struct se_session *nacl_sess;
561 struct se_portal_group *se_tpg;
562 struct mutex lun_entry_mutex;
563 spinlock_t nacl_sess_lock;
564 struct config_group acl_group;
565 struct config_group acl_attrib_group;
566 struct config_group acl_auth_group;
567 struct config_group acl_param_group;
568 struct config_group acl_fabric_stat_group;
569 struct list_head acl_list;
570 struct list_head acl_sess_list;
571 struct completion acl_free_comp;
572 struct kref acl_kref;
573};
574
575static inline struct se_node_acl *acl_to_nacl(struct config_item *item)
576{
577 return container_of(to_config_group(item), struct se_node_acl,
578 acl_group);
579}
580
581static inline struct se_node_acl *attrib_to_nacl(struct config_item *item)
582{
583 return container_of(to_config_group(item), struct se_node_acl,
584 acl_attrib_group);
585}
586
587static inline struct se_node_acl *auth_to_nacl(struct config_item *item)
588{
589 return container_of(to_config_group(item), struct se_node_acl,
590 acl_auth_group);
591}
592
593static inline struct se_node_acl *param_to_nacl(struct config_item *item)
594{
595 return container_of(to_config_group(item), struct se_node_acl,
596 acl_param_group);
597}
598
599static inline struct se_node_acl *fabric_stat_to_nacl(struct config_item *item)
600{
601 return container_of(to_config_group(item), struct se_node_acl,
602 acl_fabric_stat_group);
603}
604
605struct se_session {
606 unsigned sess_tearing_down:1;
607 u64 sess_bin_isid;
608 enum target_prot_op sup_prot_ops;
609 enum target_prot_type sess_prot_type;
610 struct se_node_acl *se_node_acl;
611 struct se_portal_group *se_tpg;
612 void *fabric_sess_ptr;
613 struct percpu_ref cmd_count;
614 struct list_head sess_list;
615 struct list_head sess_acl_list;
616 struct list_head sess_cmd_list;
617 spinlock_t sess_cmd_lock;
618 wait_queue_head_t cmd_list_wq;
619 void *sess_cmd_map;
620 struct sbitmap_queue sess_tag_pool;
621};
622
623struct se_device;
624struct se_transform_info;
625struct scatterlist;
626
627struct se_ml_stat_grps {
628 struct config_group stat_group;
629 struct config_group scsi_auth_intr_group;
630 struct config_group scsi_att_intr_port_group;
631};
632
633struct se_lun_acl {
634 u64 mapped_lun;
635 struct se_node_acl *se_lun_nacl;
636 struct se_lun *se_lun;
637 struct config_group se_lun_group;
638 struct se_ml_stat_grps ml_stat_grps;
639};
640
641struct se_dev_entry {
642 u64 mapped_lun;
643 u64 pr_res_key;
644 u64 creation_time;
645 bool lun_access_ro;
646 u32 attach_count;
647 atomic_long_t total_cmds;
648 atomic_long_t read_bytes;
649 atomic_long_t write_bytes;
650 /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
651 struct kref pr_kref;
652 struct completion pr_comp;
653 struct se_lun_acl __rcu *se_lun_acl;
654 spinlock_t ua_lock;
655 struct se_lun __rcu *se_lun;
656#define DEF_PR_REG_ACTIVE 1
657 unsigned long deve_flags;
658 struct list_head alua_port_list;
659 struct list_head lun_link;
660 struct list_head ua_list;
661 struct hlist_node link;
662 struct rcu_head rcu_head;
663};
664
665struct se_dev_attrib {
666 int emulate_model_alias;
667 int emulate_dpo;
668 int emulate_fua_write;
669 int emulate_fua_read;
670 int emulate_write_cache;
671 int emulate_ua_intlck_ctrl;
672 int emulate_tas;
673 int emulate_tpu;
674 int emulate_tpws;
675 int emulate_caw;
676 int emulate_3pc;
677 int emulate_pr;
678 enum target_prot_type pi_prot_type;
679 enum target_prot_type hw_pi_prot_type;
680 int pi_prot_verify;
681 int enforce_pr_isids;
682 int force_pr_aptpl;
683 int is_nonrot;
684 int emulate_rest_reord;
685 int unmap_zeroes_data;
686 u32 hw_block_size;
687 u32 block_size;
688 u32 hw_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 scsi_port_stats {
710 atomic_long_t cmd_pdus;
711 atomic_long_t tx_data_octets;
712 atomic_long_t rx_data_octets;
713};
714
715struct se_lun {
716 u64 unpacked_lun;
717 bool lun_shutdown;
718 bool lun_access_ro;
719 u32 lun_index;
720
721 /* RELATIVE TARGET PORT IDENTIFER */
722 u16 lun_rtpi;
723 atomic_t lun_acl_count;
724 struct se_device __rcu *lun_se_dev;
725
726 struct list_head lun_deve_list;
727 spinlock_t lun_deve_lock;
728
729 /* ALUA state */
730 int lun_tg_pt_secondary_stat;
731 int lun_tg_pt_secondary_write_md;
732 atomic_t lun_tg_pt_secondary_offline;
733 struct mutex lun_tg_pt_md_mutex;
734
735 /* ALUA target port group linkage */
736 struct list_head lun_tg_pt_gp_link;
737 struct t10_alua_tg_pt_gp *lun_tg_pt_gp;
738 spinlock_t lun_tg_pt_gp_lock;
739
740 struct se_portal_group *lun_tpg;
741 struct scsi_port_stats lun_stats;
742 struct config_group lun_group;
743 struct se_port_stat_grps port_stat_grps;
744 struct completion lun_shutdown_comp;
745 struct percpu_ref lun_ref;
746 struct list_head lun_dev_link;
747 struct hlist_node link;
748 struct rcu_head rcu_head;
749};
750
751struct se_dev_stat_grps {
752 struct config_group stat_group;
753 struct config_group scsi_dev_group;
754 struct config_group scsi_tgt_dev_group;
755 struct config_group scsi_lu_group;
756};
757
758struct se_device {
759 /* RELATIVE TARGET PORT IDENTIFER Counter */
760 u16 dev_rpti_counter;
761 /* Used for SAM Task Attribute ordering */
762 u32 dev_cur_ordered_id;
763 u32 dev_flags;
764#define DF_CONFIGURED 0x00000001
765#define DF_FIRMWARE_VPD_UNIT_SERIAL 0x00000002
766#define DF_EMULATED_VPD_UNIT_SERIAL 0x00000004
767#define DF_USING_UDEV_PATH 0x00000008
768#define DF_USING_ALIAS 0x00000010
769#define DF_READ_ONLY 0x00000020
770 /* Physical device queue depth */
771 u32 queue_depth;
772 /* Used for SPC-2 reservations enforce of ISIDs */
773 u64 dev_res_bin_isid;
774 /* Pointer to transport specific device structure */
775 u32 dev_index;
776 u64 creation_time;
777 atomic_long_t num_resets;
778 atomic_long_t aborts_complete;
779 atomic_long_t aborts_no_task;
780 atomic_long_t num_cmds;
781 atomic_long_t read_bytes;
782 atomic_long_t write_bytes;
783 /* Active commands on this virtual SE device */
784 atomic_t simple_cmds;
785 atomic_t dev_ordered_sync;
786 atomic_t dev_qf_count;
787 u32 export_count;
788 spinlock_t delayed_cmd_lock;
789 spinlock_t execute_task_lock;
790 spinlock_t dev_reservation_lock;
791 unsigned int dev_reservation_flags;
792#define DRF_SPC2_RESERVATIONS 0x00000001
793#define DRF_SPC2_RESERVATIONS_WITH_ISID 0x00000002
794 spinlock_t se_port_lock;
795 spinlock_t se_tmr_lock;
796 spinlock_t qf_cmd_lock;
797 struct semaphore caw_sem;
798 /* Used for legacy SPC-2 reservations */
799 struct se_session *reservation_holder;
800 /* Used for ALUA Logical Unit Group membership */
801 struct t10_alua_lu_gp_member *dev_alua_lu_gp_mem;
802 /* Used for SPC-3 Persistent Reservations */
803 struct t10_pr_registration *dev_pr_res_holder;
804 struct list_head dev_sep_list;
805 struct list_head dev_tmr_list;
806 struct work_struct qf_work_queue;
807 struct list_head delayed_cmd_list;
808 struct list_head state_list;
809 struct list_head qf_cmd_list;
810 /* Pointer to associated SE HBA */
811 struct se_hba *se_hba;
812 /* T10 Inquiry and VPD WWN Information */
813 struct t10_wwn t10_wwn;
814 /* T10 Asymmetric Logical Unit Assignment for Target Ports */
815 struct t10_alua t10_alua;
816 /* T10 SPC-2 + SPC-3 Reservations */
817 struct t10_reservation t10_pr;
818 struct se_dev_attrib dev_attrib;
819 struct config_group dev_action_group;
820 struct config_group dev_group;
821 struct config_group dev_pr_group;
822 struct se_dev_stat_grps dev_stat_grps;
823#define SE_DEV_ALIAS_LEN 512 /* must be less than PAGE_SIZE */
824 unsigned char dev_alias[SE_DEV_ALIAS_LEN];
825#define SE_UDEV_PATH_LEN 512 /* must be less than PAGE_SIZE */
826 unsigned char udev_path[SE_UDEV_PATH_LEN];
827 /* Pointer to template of function pointers for transport */
828 const struct target_backend_ops *transport;
829 struct se_lun xcopy_lun;
830 /* Protection Information */
831 int prot_length;
832 /* For se_lun->lun_se_dev RCU read-side critical access */
833 u32 hba_index;
834 struct rcu_head rcu_head;
835};
836
837struct se_hba {
838 u16 hba_tpgt;
839 u32 hba_id;
840 /* See hba_flags_table */
841 u32 hba_flags;
842 /* Virtual iSCSI devices attached. */
843 u32 dev_count;
844 u32 hba_index;
845 /* Pointer to transport specific host structure. */
846 void *hba_ptr;
847 struct list_head hba_node;
848 spinlock_t device_lock;
849 struct config_group hba_group;
850 struct mutex hba_access_mutex;
851 struct target_backend *backend;
852};
853
854struct se_tpg_np {
855 struct se_portal_group *tpg_np_parent;
856 struct config_group tpg_np_group;
857};
858
859static inline struct se_tpg_np *to_tpg_np(struct config_item *item)
860{
861 return container_of(to_config_group(item), struct se_tpg_np,
862 tpg_np_group);
863}
864
865struct se_portal_group {
866 /*
867 * PROTOCOL IDENTIFIER value per SPC4, 7.5.1.
868 *
869 * Negative values can be used by fabric drivers for internal use TPGs.
870 */
871 int proto_id;
872 /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
873 atomic_t tpg_pr_ref_count;
874 /* Spinlock for adding/removing ACLed Nodes */
875 struct mutex acl_node_mutex;
876 /* Spinlock for adding/removing sessions */
877 spinlock_t session_lock;
878 struct mutex tpg_lun_mutex;
879 struct list_head se_tpg_node;
880 /* linked list for initiator ACL list */
881 struct list_head acl_node_list;
882 struct hlist_head tpg_lun_hlist;
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 const 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_lun_group;
891 struct config_group tpg_np_group;
892 struct config_group tpg_acl_group;
893 struct config_group tpg_attrib_group;
894 struct config_group tpg_auth_group;
895 struct config_group tpg_param_group;
896};
897
898static inline struct se_portal_group *to_tpg(struct config_item *item)
899{
900 return container_of(to_config_group(item), struct se_portal_group,
901 tpg_group);
902}
903
904static inline struct se_portal_group *attrib_to_tpg(struct config_item *item)
905{
906 return container_of(to_config_group(item), struct se_portal_group,
907 tpg_attrib_group);
908}
909
910static inline struct se_portal_group *auth_to_tpg(struct config_item *item)
911{
912 return container_of(to_config_group(item), struct se_portal_group,
913 tpg_auth_group);
914}
915
916static inline struct se_portal_group *param_to_tpg(struct config_item *item)
917{
918 return container_of(to_config_group(item), struct se_portal_group,
919 tpg_param_group);
920}
921
922struct se_wwn {
923 struct target_fabric_configfs *wwn_tf;
924 void *priv;
925 struct config_group wwn_group;
926 struct config_group fabric_stat_group;
927};
928
929static inline void atomic_inc_mb(atomic_t *v)
930{
931 smp_mb__before_atomic();
932 atomic_inc(v);
933 smp_mb__after_atomic();
934}
935
936static inline void atomic_dec_mb(atomic_t *v)
937{
938 smp_mb__before_atomic();
939 atomic_dec(v);
940 smp_mb__after_atomic();
941}
942
943static inline void target_free_tag(struct se_session *sess, struct se_cmd *cmd)
944{
945 sbitmap_queue_clear(&sess->sess_tag_pool, cmd->map_tag, cmd->map_cpu);
946}
947
948#endif /* TARGET_CORE_BASE_H */