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target: Fix bug with task_sg chained transport_free_dev_tasks release
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / include / target / target_core_base.h
blob95c9d9810dc2ff757872242b597fcb2872413c1a
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 "v4.0.0-rc6"
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 #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 becasue 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_ASC_KEY_OFFSET 12
40 #define SPC_ASCQ_KEY_OFFSET 13
41 #define TRANSPORT_IQN_LEN 224
42 /* Used by target_core_store_alua_lu_gp() and target_core_alua_lu_gp_show_attr_members() */
43 #define LU_GROUP_NAME_BUF 256
44 /* Used by core_alua_store_tg_pt_gp_info() and target_core_alua_tg_pt_gp_show_attr_members() */
45 #define TG_PT_GROUP_NAME_BUF 256
46 /* Used to parse VPD into struct t10_vpd */
47 #define VPD_TMP_BUF_SIZE 128
48 /* Used by transport_generic_cmd_sequencer() */
49 #define READ_BLOCK_LEN 6
50 #define READ_CAP_LEN 8
51 #define READ_POSITION_LEN 20
52 #define INQUIRY_LEN 36
53 /* Used by transport_get_inquiry_vpd_serial() */
54 #define INQUIRY_VPD_SERIAL_LEN 254
55 /* Used by transport_get_inquiry_vpd_device_ident() */
56 #define INQUIRY_VPD_DEVICE_IDENTIFIER_LEN 254
57
58 /* struct se_hba->hba_flags */
59 enum hba_flags_table {
60 HBA_FLAGS_INTERNAL_USE = 0x01,
61 HBA_FLAGS_PSCSI_MODE = 0x02,
62 };
63
64 /* struct se_lun->lun_status */
65 enum transport_lun_status_table {
66 TRANSPORT_LUN_STATUS_FREE = 0,
67 TRANSPORT_LUN_STATUS_ACTIVE = 1,
68 };
69
70 /* struct se_portal_group->se_tpg_type */
71 enum transport_tpg_type_table {
72 TRANSPORT_TPG_TYPE_NORMAL = 0,
73 TRANSPORT_TPG_TYPE_DISCOVERY = 1,
74 };
75
76 /* Used for generate timer flags */
77 enum timer_flags_table {
78 TF_RUNNING = 0x01,
79 TF_STOP = 0x02,
80 };
81
82 /* Special transport agnostic struct se_cmd->t_states */
83 enum transport_state_table {
84 TRANSPORT_NO_STATE = 0,
85 TRANSPORT_NEW_CMD = 1,
86 TRANSPORT_DEFERRED_CMD = 2,
87 TRANSPORT_WRITE_PENDING = 3,
88 TRANSPORT_PROCESS_WRITE = 4,
89 TRANSPORT_PROCESSING = 5,
90 TRANSPORT_COMPLETE_OK = 6,
91 TRANSPORT_COMPLETE_FAILURE = 7,
92 TRANSPORT_COMPLETE_TIMEOUT = 8,
93 TRANSPORT_PROCESS_TMR = 9,
94 TRANSPORT_TMR_COMPLETE = 10,
95 TRANSPORT_ISTATE_PROCESSING = 11,
96 TRANSPORT_ISTATE_PROCESSED = 12,
97 TRANSPORT_KILL = 13,
98 TRANSPORT_REMOVE = 14,
99 TRANSPORT_FREE = 15,
100 TRANSPORT_NEW_CMD_MAP = 16,
101 TRANSPORT_FREE_CMD_INTR = 17,
102 };
103
104 /* Used for struct se_cmd->se_cmd_flags */
105 enum se_cmd_flags_table {
106 SCF_SUPPORTED_SAM_OPCODE = 0x00000001,
107 SCF_TRANSPORT_TASK_SENSE = 0x00000002,
108 SCF_EMULATED_TASK_SENSE = 0x00000004,
109 SCF_SCSI_DATA_SG_IO_CDB = 0x00000008,
110 SCF_SCSI_CONTROL_SG_IO_CDB = 0x00000010,
111 SCF_SCSI_CONTROL_NONSG_IO_CDB = 0x00000020,
112 SCF_SCSI_NON_DATA_CDB = 0x00000040,
113 SCF_SCSI_CDB_EXCEPTION = 0x00000080,
114 SCF_SCSI_RESERVATION_CONFLICT = 0x00000100,
115 SCF_CMD_PASSTHROUGH_NOALLOC = 0x00000200,
116 SCF_SE_CMD_FAILED = 0x00000400,
117 SCF_SE_LUN_CMD = 0x00000800,
118 SCF_SE_ALLOW_EOO = 0x00001000,
119 SCF_SE_DISABLE_ONLINE_CHECK = 0x00002000,
120 SCF_SENT_CHECK_CONDITION = 0x00004000,
121 SCF_OVERFLOW_BIT = 0x00008000,
122 SCF_UNDERFLOW_BIT = 0x00010000,
123 SCF_SENT_DELAYED_TAS = 0x00020000,
124 SCF_ALUA_NON_OPTIMIZED = 0x00040000,
125 SCF_DELAYED_CMD_FROM_SAM_ATTR = 0x00080000,
126 SCF_PASSTHROUGH_SG_TO_MEM = 0x00100000,
127 SCF_PASSTHROUGH_CONTIG_TO_SG = 0x00200000,
128 SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC = 0x00400000,
129 SCF_EMULATE_SYNC_CACHE = 0x00800000,
130 SCF_EMULATE_CDB_ASYNC = 0x01000000,
131 SCF_EMULATE_SYNC_UNMAP = 0x02000000
132 };
133
134 /* struct se_dev_entry->lun_flags and struct se_lun->lun_access */
135 enum transport_lunflags_table {
136 TRANSPORT_LUNFLAGS_NO_ACCESS = 0x00,
137 TRANSPORT_LUNFLAGS_INITIATOR_ACCESS = 0x01,
138 TRANSPORT_LUNFLAGS_READ_ONLY = 0x02,
139 TRANSPORT_LUNFLAGS_READ_WRITE = 0x04,
140 };
141
142 /* struct se_device->dev_status */
143 enum transport_device_status_table {
144 TRANSPORT_DEVICE_ACTIVATED = 0x01,
145 TRANSPORT_DEVICE_DEACTIVATED = 0x02,
146 TRANSPORT_DEVICE_QUEUE_FULL = 0x04,
147 TRANSPORT_DEVICE_SHUTDOWN = 0x08,
148 TRANSPORT_DEVICE_OFFLINE_ACTIVATED = 0x10,
149 TRANSPORT_DEVICE_OFFLINE_DEACTIVATED = 0x20,
150 };
151
152 /*
153 * Used by transport_send_check_condition_and_sense() and se_cmd->scsi_sense_reason
154 * to signal which ASC/ASCQ sense payload should be built.
155 */
156 enum tcm_sense_reason_table {
157 TCM_NON_EXISTENT_LUN = 0x01,
158 TCM_UNSUPPORTED_SCSI_OPCODE = 0x02,
159 TCM_INCORRECT_AMOUNT_OF_DATA = 0x03,
160 TCM_UNEXPECTED_UNSOLICITED_DATA = 0x04,
161 TCM_SERVICE_CRC_ERROR = 0x05,
162 TCM_SNACK_REJECTED = 0x06,
163 TCM_SECTOR_COUNT_TOO_MANY = 0x07,
164 TCM_INVALID_CDB_FIELD = 0x08,
165 TCM_INVALID_PARAMETER_LIST = 0x09,
166 TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE = 0x0a,
167 TCM_UNKNOWN_MODE_PAGE = 0x0b,
168 TCM_WRITE_PROTECTED = 0x0c,
169 TCM_CHECK_CONDITION_ABORT_CMD = 0x0d,
170 TCM_CHECK_CONDITION_UNIT_ATTENTION = 0x0e,
171 TCM_CHECK_CONDITION_NOT_READY = 0x0f,
172 };
173
174 struct se_obj {
175 atomic_t obj_access_count;
176 } ____cacheline_aligned;
177
178 /*
179 * Used by TCM Core internally to signal if ALUA emulation is enabled or
180 * disabled, or running in with TCM/pSCSI passthrough mode
181 */
182 typedef enum {
183 SPC_ALUA_PASSTHROUGH,
184 SPC2_ALUA_DISABLED,
185 SPC3_ALUA_EMULATED
186 } t10_alua_index_t;
187
188 /*
189 * Used by TCM Core internally to signal if SAM Task Attribute emulation
190 * is enabled or disabled, or running in with TCM/pSCSI passthrough mode
191 */
192 typedef enum {
193 SAM_TASK_ATTR_PASSTHROUGH,
194 SAM_TASK_ATTR_UNTAGGED,
195 SAM_TASK_ATTR_EMULATED
196 } t10_task_attr_index_t;
197
198 /*
199 * Used for target SCSI statistics
200 */
201 typedef enum {
202 SCSI_INST_INDEX,
203 SCSI_DEVICE_INDEX,
204 SCSI_AUTH_INTR_INDEX,
205 SCSI_INDEX_TYPE_MAX
206 } scsi_index_t;
207
208 struct scsi_index_table {
209 spinlock_t lock;
210 u32 scsi_mib_index[SCSI_INDEX_TYPE_MAX];
211 } ____cacheline_aligned;
212
213 struct se_cmd;
214
215 struct t10_alua {
216 t10_alua_index_t alua_type;
217 /* ALUA Target Port Group ID */
218 u16 alua_tg_pt_gps_counter;
219 u32 alua_tg_pt_gps_count;
220 spinlock_t tg_pt_gps_lock;
221 struct se_subsystem_dev *t10_sub_dev;
222 /* Used for default ALUA Target Port Group */
223 struct t10_alua_tg_pt_gp *default_tg_pt_gp;
224 /* Used for default ALUA Target Port Group ConfigFS group */
225 struct config_group alua_tg_pt_gps_group;
226 int (*alua_state_check)(struct se_cmd *, unsigned char *, u8 *);
227 struct list_head tg_pt_gps_list;
228 } ____cacheline_aligned;
229
230 struct t10_alua_lu_gp {
231 u16 lu_gp_id;
232 int lu_gp_valid_id;
233 u32 lu_gp_members;
234 atomic_t lu_gp_shutdown;
235 atomic_t lu_gp_ref_cnt;
236 spinlock_t lu_gp_lock;
237 struct config_group lu_gp_group;
238 struct list_head lu_gp_list;
239 struct list_head lu_gp_mem_list;
240 } ____cacheline_aligned;
241
242 struct t10_alua_lu_gp_member {
243 int lu_gp_assoc:1;
244 atomic_t lu_gp_mem_ref_cnt;
245 spinlock_t lu_gp_mem_lock;
246 struct t10_alua_lu_gp *lu_gp;
247 struct se_device *lu_gp_mem_dev;
248 struct list_head lu_gp_mem_list;
249 } ____cacheline_aligned;
250
251 struct t10_alua_tg_pt_gp {
252 u16 tg_pt_gp_id;
253 int tg_pt_gp_valid_id;
254 int tg_pt_gp_alua_access_status;
255 int tg_pt_gp_alua_access_type;
256 int tg_pt_gp_nonop_delay_msecs;
257 int tg_pt_gp_trans_delay_msecs;
258 int tg_pt_gp_pref;
259 int tg_pt_gp_write_metadata;
260 /* Used by struct t10_alua_tg_pt_gp->tg_pt_gp_md_buf_len */
261 #define ALUA_MD_BUF_LEN 1024
262 u32 tg_pt_gp_md_buf_len;
263 u32 tg_pt_gp_members;
264 atomic_t tg_pt_gp_alua_access_state;
265 atomic_t tg_pt_gp_ref_cnt;
266 spinlock_t tg_pt_gp_lock;
267 struct mutex tg_pt_gp_md_mutex;
268 struct se_subsystem_dev *tg_pt_gp_su_dev;
269 struct config_group tg_pt_gp_group;
270 struct list_head tg_pt_gp_list;
271 struct list_head tg_pt_gp_mem_list;
272 } ____cacheline_aligned;
273
274 struct t10_alua_tg_pt_gp_member {
275 int tg_pt_gp_assoc:1;
276 atomic_t tg_pt_gp_mem_ref_cnt;
277 spinlock_t tg_pt_gp_mem_lock;
278 struct t10_alua_tg_pt_gp *tg_pt_gp;
279 struct se_port *tg_pt;
280 struct list_head tg_pt_gp_mem_list;
281 } ____cacheline_aligned;
282
283 struct t10_vpd {
284 unsigned char device_identifier[INQUIRY_VPD_DEVICE_IDENTIFIER_LEN];
285 int protocol_identifier_set;
286 u32 protocol_identifier;
287 u32 device_identifier_code_set;
288 u32 association;
289 u32 device_identifier_type;
290 struct list_head vpd_list;
291 } ____cacheline_aligned;
292
293 struct t10_wwn {
294 unsigned char vendor[8];
295 unsigned char model[16];
296 unsigned char revision[4];
297 unsigned char unit_serial[INQUIRY_VPD_SERIAL_LEN];
298 spinlock_t t10_vpd_lock;
299 struct se_subsystem_dev *t10_sub_dev;
300 struct config_group t10_wwn_group;
301 struct list_head t10_vpd_list;
302 } ____cacheline_aligned;
303
304
305 /*
306 * Used by TCM Core internally to signal if >= SPC-3 peristent reservations
307 * emulation is enabled or disabled, or running in with TCM/pSCSI passthrough
308 * mode
309 */
310 typedef enum {
311 SPC_PASSTHROUGH,
312 SPC2_RESERVATIONS,
313 SPC3_PERSISTENT_RESERVATIONS
314 } t10_reservations_index_t;
315
316 struct t10_pr_registration {
317 /* Used for fabrics that contain WWN+ISID */
318 #define PR_REG_ISID_LEN 16
319 /* PR_REG_ISID_LEN + ',i,0x' */
320 #define PR_REG_ISID_ID_LEN (PR_REG_ISID_LEN + 5)
321 char pr_reg_isid[PR_REG_ISID_LEN];
322 /* Used during APTPL metadata reading */
323 #define PR_APTPL_MAX_IPORT_LEN 256
324 unsigned char pr_iport[PR_APTPL_MAX_IPORT_LEN];
325 /* Used during APTPL metadata reading */
326 #define PR_APTPL_MAX_TPORT_LEN 256
327 unsigned char pr_tport[PR_APTPL_MAX_TPORT_LEN];
328 /* For writing out live meta data */
329 unsigned char *pr_aptpl_buf;
330 u16 pr_aptpl_rpti;
331 u16 pr_reg_tpgt;
332 /* Reservation effects all target ports */
333 int pr_reg_all_tg_pt;
334 /* Activate Persistence across Target Power Loss */
335 int pr_reg_aptpl;
336 int pr_res_holder;
337 int pr_res_type;
338 int pr_res_scope;
339 /* Used for fabric initiator WWPNs using a ISID */
340 int isid_present_at_reg:1;
341 u32 pr_res_mapped_lun;
342 u32 pr_aptpl_target_lun;
343 u32 pr_res_generation;
344 u64 pr_reg_bin_isid;
345 u64 pr_res_key;
346 atomic_t pr_res_holders;
347 struct se_node_acl *pr_reg_nacl;
348 struct se_dev_entry *pr_reg_deve;
349 struct se_lun *pr_reg_tg_pt_lun;
350 struct list_head pr_reg_list;
351 struct list_head pr_reg_abort_list;
352 struct list_head pr_reg_aptpl_list;
353 struct list_head pr_reg_atp_list;
354 struct list_head pr_reg_atp_mem_list;
355 } ____cacheline_aligned;
356
357 /*
358 * This set of function pointer ops is set based upon SPC3_PERSISTENT_RESERVATIONS,
359 * SPC2_RESERVATIONS or SPC_PASSTHROUGH in drivers/target/target_core_pr.c:
360 * core_setup_reservations()
361 */
362 struct t10_reservation_ops {
363 int (*t10_reservation_check)(struct se_cmd *, u32 *);
364 int (*t10_seq_non_holder)(struct se_cmd *, unsigned char *, u32);
365 int (*t10_pr_register)(struct se_cmd *);
366 int (*t10_pr_clear)(struct se_cmd *);
367 };
368
369 struct t10_reservation_template {
370 /* Reservation effects all target ports */
371 int pr_all_tg_pt;
372 /* Activate Persistence across Target Power Loss enabled
373 * for SCSI device */
374 int pr_aptpl_active;
375 /* Used by struct t10_reservation_template->pr_aptpl_buf_len */
376 #define PR_APTPL_BUF_LEN 8192
377 u32 pr_aptpl_buf_len;
378 u32 pr_generation;
379 t10_reservations_index_t res_type;
380 spinlock_t registration_lock;
381 spinlock_t aptpl_reg_lock;
382 /*
383 * This will always be set by one individual I_T Nexus.
384 * However with all_tg_pt=1, other I_T Nexus from the
385 * same initiator can access PR reg/res info on a different
386 * target port.
387 *
388 * There is also the 'All Registrants' case, where there is
389 * a single *pr_res_holder of the reservation, but all
390 * registrations are considered reservation holders.
391 */
392 struct se_node_acl *pr_res_holder;
393 struct list_head registration_list;
394 struct list_head aptpl_reg_list;
395 struct t10_reservation_ops pr_ops;
396 } ____cacheline_aligned;
397
398 struct se_queue_req {
399 int state;
400 void *cmd;
401 struct list_head qr_list;
402 } ____cacheline_aligned;
403
404 struct se_queue_obj {
405 atomic_t queue_cnt;
406 spinlock_t cmd_queue_lock;
407 struct list_head qobj_list;
408 wait_queue_head_t thread_wq;
409 } ____cacheline_aligned;
410
411 /*
412 * Used one per struct se_cmd to hold all extra struct se_task
413 * metadata. This structure is setup and allocated in
414 * drivers/target/target_core_transport.c:__transport_alloc_se_cmd()
415 */
416 struct se_transport_task {
417 unsigned char *t_task_cdb;
418 unsigned char __t_task_cdb[TCM_MAX_COMMAND_SIZE];
419 unsigned long long t_task_lba;
420 int t_tasks_failed;
421 int t_tasks_fua;
422 int t_tasks_bidi:1;
423 u32 t_task_cdbs;
424 u32 t_tasks_check;
425 u32 t_tasks_no;
426 u32 t_tasks_sectors;
427 u32 t_tasks_se_num;
428 u32 t_tasks_se_bidi_num;
429 u32 t_tasks_sg_chained_no;
430 atomic_t t_fe_count;
431 atomic_t t_se_count;
432 atomic_t t_task_cdbs_left;
433 atomic_t t_task_cdbs_ex_left;
434 atomic_t t_task_cdbs_timeout_left;
435 atomic_t t_task_cdbs_sent;
436 atomic_t t_transport_aborted;
437 atomic_t t_transport_active;
438 atomic_t t_transport_complete;
439 atomic_t t_transport_queue_active;
440 atomic_t t_transport_sent;
441 atomic_t t_transport_stop;
442 atomic_t t_transport_timeout;
443 atomic_t transport_dev_active;
444 atomic_t transport_lun_active;
445 atomic_t transport_lun_fe_stop;
446 atomic_t transport_lun_stop;
447 spinlock_t t_state_lock;
448 struct completion t_transport_stop_comp;
449 struct completion transport_lun_fe_stop_comp;
450 struct completion transport_lun_stop_comp;
451 struct scatterlist *t_tasks_sg_chained;
452 struct scatterlist t_tasks_sg_bounce;
453 void *t_task_buf;
454 /*
455 * Used for pre-registered fabric SGL passthrough WRITE and READ
456 * with the special SCF_PASSTHROUGH_CONTIG_TO_SG case for TCM_Loop
457 * and other HW target mode fabric modules.
458 */
459 struct scatterlist *t_task_pt_sgl;
460 struct list_head *t_mem_list;
461 /* Used for BIDI READ */
462 struct list_head *t_mem_bidi_list;
463 struct list_head t_task_list;
464 } ____cacheline_aligned;
465
466 struct se_task {
467 unsigned char task_sense;
468 struct scatterlist *task_sg;
469 struct scatterlist *task_sg_bidi;
470 u8 task_scsi_status;
471 u8 task_flags;
472 int task_error_status;
473 int task_state_flags;
474 int task_padded_sg:1;
475 unsigned long long task_lba;
476 u32 task_no;
477 u32 task_sectors;
478 u32 task_size;
479 u32 task_sg_num;
480 u32 task_sg_offset;
481 enum dma_data_direction task_data_direction;
482 struct se_cmd *task_se_cmd;
483 struct se_device *se_dev;
484 struct completion task_stop_comp;
485 atomic_t task_active;
486 atomic_t task_execute_queue;
487 atomic_t task_timeout;
488 atomic_t task_sent;
489 atomic_t task_stop;
490 atomic_t task_state_active;
491 struct timer_list task_timer;
492 struct se_device *se_obj_ptr;
493 struct list_head t_list;
494 struct list_head t_execute_list;
495 struct list_head t_state_list;
496 } ____cacheline_aligned;
497
498 #define TASK_CMD(task) ((struct se_cmd *)task->task_se_cmd)
499 #define TASK_DEV(task) ((struct se_device *)task->se_dev)
500
501 struct se_cmd {
502 /* SAM response code being sent to initiator */
503 u8 scsi_status;
504 u8 scsi_asc;
505 u8 scsi_ascq;
506 u8 scsi_sense_reason;
507 u16 scsi_sense_length;
508 /* Delay for ALUA Active/NonOptimized state access in milliseconds */
509 int alua_nonop_delay;
510 /* See include/linux/dma-mapping.h */
511 enum dma_data_direction data_direction;
512 /* For SAM Task Attribute */
513 int sam_task_attr;
514 /* Transport protocol dependent state, see transport_state_table */
515 enum transport_state_table t_state;
516 /* Transport protocol dependent state for out of order CmdSNs */
517 int deferred_t_state;
518 /* Transport specific error status */
519 int transport_error_status;
520 /* See se_cmd_flags_table */
521 u32 se_cmd_flags;
522 u32 se_ordered_id;
523 /* Total size in bytes associated with command */
524 u32 data_length;
525 /* SCSI Presented Data Transfer Length */
526 u32 cmd_spdtl;
527 u32 residual_count;
528 u32 orig_fe_lun;
529 /* Persistent Reservation key */
530 u64 pr_res_key;
531 atomic_t transport_sent;
532 /* Used for sense data */
533 void *sense_buffer;
534 struct list_head se_delayed_list;
535 struct list_head se_ordered_list;
536 struct list_head se_lun_list;
537 struct se_device *se_dev;
538 struct se_dev_entry *se_deve;
539 struct se_device *se_obj_ptr;
540 struct se_device *se_orig_obj_ptr;
541 struct se_lun *se_lun;
542 /* Only used for internal passthrough and legacy TCM fabric modules */
543 struct se_session *se_sess;
544 struct se_tmr_req *se_tmr_req;
545 /* t_task is setup to t_task_backstore in transport_init_se_cmd() */
546 struct se_transport_task *t_task;
547 struct se_transport_task t_task_backstore;
548 struct target_core_fabric_ops *se_tfo;
549 int (*transport_emulate_cdb)(struct se_cmd *);
550 void (*transport_split_cdb)(unsigned long long, u32 *, unsigned char *);
551 void (*transport_wait_for_tasks)(struct se_cmd *, int, int);
552 void (*transport_complete_callback)(struct se_cmd *);
553 } ____cacheline_aligned;
554
555 #define T_TASK(cmd) ((struct se_transport_task *)(cmd->t_task))
556 #define CMD_TFO(cmd) ((struct target_core_fabric_ops *)cmd->se_tfo)
557
558 struct se_tmr_req {
559 /* Task Management function to be preformed */
560 u8 function;
561 /* Task Management response to send */
562 u8 response;
563 int call_transport;
564 /* Reference to ITT that Task Mgmt should be preformed */
565 u32 ref_task_tag;
566 /* 64-bit encoded SAM LUN from $FABRIC_MOD TMR header */
567 u64 ref_task_lun;
568 void *fabric_tmr_ptr;
569 struct se_cmd *task_cmd;
570 struct se_cmd *ref_cmd;
571 struct se_device *tmr_dev;
572 struct se_lun *tmr_lun;
573 struct list_head tmr_list;
574 } ____cacheline_aligned;
575
576 struct se_ua {
577 u8 ua_asc;
578 u8 ua_ascq;
579 struct se_node_acl *ua_nacl;
580 struct list_head ua_dev_list;
581 struct list_head ua_nacl_list;
582 } ____cacheline_aligned;
583
584 struct se_node_acl {
585 char initiatorname[TRANSPORT_IQN_LEN];
586 /* Used to signal demo mode created ACL, disabled by default */
587 int dynamic_node_acl:1;
588 u32 queue_depth;
589 u32 acl_index;
590 u64 num_cmds;
591 u64 read_bytes;
592 u64 write_bytes;
593 spinlock_t stats_lock;
594 /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
595 atomic_t acl_pr_ref_count;
596 struct se_dev_entry *device_list;
597 struct se_session *nacl_sess;
598 struct se_portal_group *se_tpg;
599 spinlock_t device_list_lock;
600 spinlock_t nacl_sess_lock;
601 struct config_group acl_group;
602 struct config_group acl_attrib_group;
603 struct config_group acl_auth_group;
604 struct config_group acl_param_group;
605 struct config_group *acl_default_groups[4];
606 struct list_head acl_list;
607 struct list_head acl_sess_list;
608 } ____cacheline_aligned;
609
610 struct se_session {
611 u64 sess_bin_isid;
612 struct se_node_acl *se_node_acl;
613 struct se_portal_group *se_tpg;
614 void *fabric_sess_ptr;
615 struct list_head sess_list;
616 struct list_head sess_acl_list;
617 } ____cacheline_aligned;
618
619 #define SE_SESS(cmd) ((struct se_session *)(cmd)->se_sess)
620 #define SE_NODE_ACL(sess) ((struct se_node_acl *)(sess)->se_node_acl)
621
622 struct se_device;
623 struct se_transform_info;
624 struct scatterlist;
625
626 struct se_lun_acl {
627 char initiatorname[TRANSPORT_IQN_LEN];
628 u32 mapped_lun;
629 struct se_node_acl *se_lun_nacl;
630 struct se_lun *se_lun;
631 struct list_head lacl_list;
632 struct config_group se_lun_group;
633 } ____cacheline_aligned;
634
635 struct se_dev_entry {
636 int def_pr_registered:1;
637 /* See transport_lunflags_table */
638 u32 lun_flags;
639 u32 deve_cmds;
640 u32 mapped_lun;
641 u32 average_bytes;
642 u32 last_byte_count;
643 u32 total_cmds;
644 u32 total_bytes;
645 u64 pr_res_key;
646 u64 creation_time;
647 u32 attach_count;
648 u64 read_bytes;
649 u64 write_bytes;
650 atomic_t ua_count;
651 /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
652 atomic_t pr_ref_count;
653 struct se_lun_acl *se_lun_acl;
654 spinlock_t ua_lock;
655 struct se_lun *se_lun;
656 struct list_head alua_port_list;
657 struct list_head ua_list;
658 } ____cacheline_aligned;
659
660 struct se_dev_limits {
661 /* Max supported HW queue depth */
662 u32 hw_queue_depth;
663 /* Max supported virtual queue depth */
664 u32 queue_depth;
665 /* From include/linux/blkdev.h for the other HW/SW limits. */
666 struct queue_limits limits;
667 } ____cacheline_aligned;
668
669 struct se_dev_attrib {
670 int emulate_dpo;
671 int emulate_fua_write;
672 int emulate_fua_read;
673 int emulate_write_cache;
674 int emulate_ua_intlck_ctrl;
675 int emulate_tas;
676 int emulate_tpu;
677 int emulate_tpws;
678 int emulate_reservations;
679 int emulate_alua;
680 int enforce_pr_isids;
681 u32 hw_block_size;
682 u32 block_size;
683 u32 hw_max_sectors;
684 u32 max_sectors;
685 u32 optimal_sectors;
686 u32 hw_queue_depth;
687 u32 queue_depth;
688 u32 task_timeout;
689 u32 max_unmap_lba_count;
690 u32 max_unmap_block_desc_count;
691 u32 unmap_granularity;
692 u32 unmap_granularity_alignment;
693 struct se_subsystem_dev *da_sub_dev;
694 struct config_group da_group;
695 } ____cacheline_aligned;
696
697 struct se_subsystem_dev {
698 /* Used for struct se_subsystem_dev-->se_dev_alias, must be less than PAGE_SIZE */
699 #define SE_DEV_ALIAS_LEN 512
700 unsigned char se_dev_alias[SE_DEV_ALIAS_LEN];
701 /* Used for struct se_subsystem_dev->se_dev_udev_path[], must be less than PAGE_SIZE */
702 #define SE_UDEV_PATH_LEN 512
703 unsigned char se_dev_udev_path[SE_UDEV_PATH_LEN];
704 u32 su_dev_flags;
705 struct se_hba *se_dev_hba;
706 struct se_device *se_dev_ptr;
707 struct se_dev_attrib se_dev_attrib;
708 /* T10 Asymmetric Logical Unit Assignment for Target Ports */
709 struct t10_alua t10_alua;
710 /* T10 Inquiry and VPD WWN Information */
711 struct t10_wwn t10_wwn;
712 /* T10 SPC-2 + SPC-3 Reservations */
713 struct t10_reservation_template t10_reservation;
714 spinlock_t se_dev_lock;
715 void *se_dev_su_ptr;
716 struct list_head g_se_dev_list;
717 struct config_group se_dev_group;
718 /* For T10 Reservations */
719 struct config_group se_dev_pr_group;
720 } ____cacheline_aligned;
721
722 #define T10_ALUA(su_dev) (&(su_dev)->t10_alua)
723 #define T10_RES(su_dev) (&(su_dev)->t10_reservation)
724 #define T10_PR_OPS(su_dev) (&(su_dev)->t10_reservation.pr_ops)
725
726 struct se_device {
727 /* Set to 1 if thread is NOT sleeping on thread_sem */
728 u8 thread_active;
729 u8 dev_status_timer_flags;
730 /* RELATIVE TARGET PORT IDENTIFER Counter */
731 u16 dev_rpti_counter;
732 /* Used for SAM Task Attribute ordering */
733 u32 dev_cur_ordered_id;
734 u32 dev_flags;
735 u32 dev_port_count;
736 /* See transport_device_status_table */
737 u32 dev_status;
738 u32 dev_tcq_window_closed;
739 /* Physical device queue depth */
740 u32 queue_depth;
741 /* Used for SPC-2 reservations enforce of ISIDs */
742 u64 dev_res_bin_isid;
743 t10_task_attr_index_t dev_task_attr_type;
744 /* Pointer to transport specific device structure */
745 void *dev_ptr;
746 u32 dev_index;
747 u64 creation_time;
748 u32 num_resets;
749 u64 num_cmds;
750 u64 read_bytes;
751 u64 write_bytes;
752 spinlock_t stats_lock;
753 /* Active commands on this virtual SE device */
754 atomic_t active_cmds;
755 atomic_t simple_cmds;
756 atomic_t depth_left;
757 atomic_t dev_ordered_id;
758 atomic_t dev_tur_active;
759 atomic_t execute_tasks;
760 atomic_t dev_status_thr_count;
761 atomic_t dev_hoq_count;
762 atomic_t dev_ordered_sync;
763 struct se_obj dev_obj;
764 struct se_obj dev_access_obj;
765 struct se_obj dev_export_obj;
766 struct se_queue_obj *dev_queue_obj;
767 struct se_queue_obj *dev_status_queue_obj;
768 spinlock_t delayed_cmd_lock;
769 spinlock_t ordered_cmd_lock;
770 spinlock_t execute_task_lock;
771 spinlock_t state_task_lock;
772 spinlock_t dev_alua_lock;
773 spinlock_t dev_reservation_lock;
774 spinlock_t dev_state_lock;
775 spinlock_t dev_status_lock;
776 spinlock_t dev_status_thr_lock;
777 spinlock_t se_port_lock;
778 spinlock_t se_tmr_lock;
779 /* Used for legacy SPC-2 reservationsa */
780 struct se_node_acl *dev_reserved_node_acl;
781 /* Used for ALUA Logical Unit Group membership */
782 struct t10_alua_lu_gp_member *dev_alua_lu_gp_mem;
783 /* Used for SPC-3 Persistent Reservations */
784 struct t10_pr_registration *dev_pr_res_holder;
785 struct list_head dev_sep_list;
786 struct list_head dev_tmr_list;
787 struct timer_list dev_status_timer;
788 /* Pointer to descriptor for processing thread */
789 struct task_struct *process_thread;
790 pid_t process_thread_pid;
791 struct task_struct *dev_mgmt_thread;
792 struct list_head delayed_cmd_list;
793 struct list_head ordered_cmd_list;
794 struct list_head execute_task_list;
795 struct list_head state_task_list;
796 /* Pointer to associated SE HBA */
797 struct se_hba *se_hba;
798 struct se_subsystem_dev *se_sub_dev;
799 /* Pointer to template of function pointers for transport */
800 struct se_subsystem_api *transport;
801 /* Linked list for struct se_hba struct se_device list */
802 struct list_head dev_list;
803 /* Linked list for struct se_global->g_se_dev_list */
804 struct list_head g_se_dev_list;
805 } ____cacheline_aligned;
806
807 #define SE_DEV(cmd) ((struct se_device *)(cmd)->se_lun->lun_se_dev)
808 #define SU_DEV(dev) ((struct se_subsystem_dev *)(dev)->se_sub_dev)
809 #define DEV_ATTRIB(dev) (&(dev)->se_sub_dev->se_dev_attrib)
810 #define DEV_T10_WWN(dev) (&(dev)->se_sub_dev->t10_wwn)
811
812 struct se_hba {
813 u16 hba_tpgt;
814 u32 hba_id;
815 /* See hba_flags_table */
816 u32 hba_flags;
817 /* Virtual iSCSI devices attached. */
818 u32 dev_count;
819 u32 hba_index;
820 atomic_t load_balance_queue;
821 atomic_t left_queue_depth;
822 /* Maximum queue depth the HBA can handle. */
823 atomic_t max_queue_depth;
824 /* Pointer to transport specific host structure. */
825 void *hba_ptr;
826 /* Linked list for struct se_device */
827 struct list_head hba_dev_list;
828 struct list_head hba_list;
829 spinlock_t device_lock;
830 spinlock_t hba_queue_lock;
831 struct config_group hba_group;
832 struct mutex hba_access_mutex;
833 struct se_subsystem_api *transport;
834 } ____cacheline_aligned;
835
836 #define SE_HBA(d) ((struct se_hba *)(d)->se_hba)
837
838 struct se_lun {
839 /* See transport_lun_status_table */
840 enum transport_lun_status_table lun_status;
841 u32 lun_access;
842 u32 lun_flags;
843 u32 unpacked_lun;
844 atomic_t lun_acl_count;
845 spinlock_t lun_acl_lock;
846 spinlock_t lun_cmd_lock;
847 spinlock_t lun_sep_lock;
848 struct completion lun_shutdown_comp;
849 struct list_head lun_cmd_list;
850 struct list_head lun_acl_list;
851 struct se_device *lun_se_dev;
852 struct config_group lun_group;
853 struct se_port *lun_sep;
854 } ____cacheline_aligned;
855
856 #define SE_LUN(c) ((struct se_lun *)(c)->se_lun)
857
858 struct scsi_port_stats {
859 u64 cmd_pdus;
860 u64 tx_data_octets;
861 u64 rx_data_octets;
862 } ____cacheline_aligned;
863
864 struct se_port {
865 /* RELATIVE TARGET PORT IDENTIFER */
866 u16 sep_rtpi;
867 int sep_tg_pt_secondary_stat;
868 int sep_tg_pt_secondary_write_md;
869 u32 sep_index;
870 struct scsi_port_stats sep_stats;
871 /* Used for ALUA Target Port Groups membership */
872 atomic_t sep_tg_pt_gp_active;
873 atomic_t sep_tg_pt_secondary_offline;
874 /* Used for PR ALL_TG_PT=1 */
875 atomic_t sep_tg_pt_ref_cnt;
876 spinlock_t sep_alua_lock;
877 struct mutex sep_tg_pt_md_mutex;
878 struct t10_alua_tg_pt_gp_member *sep_alua_tg_pt_gp_mem;
879 struct se_lun *sep_lun;
880 struct se_portal_group *sep_tpg;
881 struct list_head sep_alua_list;
882 struct list_head sep_list;
883 } ____cacheline_aligned;
884
885 struct se_tpg_np {
886 struct se_portal_group *tpg_np_parent;
887 struct config_group tpg_np_group;
888 } ____cacheline_aligned;
889
890 struct se_portal_group {
891 /* Type of target portal group, see transport_tpg_type_table */
892 enum transport_tpg_type_table se_tpg_type;
893 /* Number of ACLed Initiator Nodes for this TPG */
894 u32 num_node_acls;
895 /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
896 atomic_t tpg_pr_ref_count;
897 /* Spinlock for adding/removing ACLed Nodes */
898 spinlock_t acl_node_lock;
899 /* Spinlock for adding/removing sessions */
900 spinlock_t session_lock;
901 spinlock_t tpg_lun_lock;
902 /* Pointer to $FABRIC_MOD portal group */
903 void *se_tpg_fabric_ptr;
904 struct list_head se_tpg_list;
905 /* linked list for initiator ACL list */
906 struct list_head acl_node_list;
907 struct se_lun *tpg_lun_list;
908 struct se_lun tpg_virt_lun0;
909 /* List of TCM sessions assoicated wth this TPG */
910 struct list_head tpg_sess_list;
911 /* Pointer to $FABRIC_MOD dependent code */
912 struct target_core_fabric_ops *se_tpg_tfo;
913 struct se_wwn *se_tpg_wwn;
914 struct config_group tpg_group;
915 struct config_group *tpg_default_groups[6];
916 struct config_group tpg_lun_group;
917 struct config_group tpg_np_group;
918 struct config_group tpg_acl_group;
919 struct config_group tpg_attrib_group;
920 struct config_group tpg_param_group;
921 } ____cacheline_aligned;
922
923 #define TPG_TFO(se_tpg) ((struct target_core_fabric_ops *)(se_tpg)->se_tpg_tfo)
924
925 struct se_wwn {
926 struct target_fabric_configfs *wwn_tf;
927 struct config_group wwn_group;
928 } ____cacheline_aligned;
929
930 struct se_global {
931 u16 alua_lu_gps_counter;
932 int g_sub_api_initialized;
933 u32 in_shutdown;
934 u32 alua_lu_gps_count;
935 u32 g_hba_id_counter;
936 struct config_group target_core_hbagroup;
937 struct config_group alua_group;
938 struct config_group alua_lu_gps_group;
939 struct list_head g_lu_gps_list;
940 struct list_head g_se_tpg_list;
941 struct list_head g_hba_list;
942 struct list_head g_se_dev_list;
943 struct se_hba *g_lun0_hba;
944 struct se_subsystem_dev *g_lun0_su_dev;
945 struct se_device *g_lun0_dev;
946 struct t10_alua_lu_gp *default_lu_gp;
947 spinlock_t g_device_lock;
948 spinlock_t hba_lock;
949 spinlock_t se_tpg_lock;
950 spinlock_t lu_gps_lock;
951 spinlock_t plugin_class_lock;
952 } ____cacheline_aligned;
953
954 #endif /* TARGET_CORE_BASE_H */
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