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p54: potential signedness issue in p54_parse_rssical()
[linux-2.6/btrfs-unstable.git] / include / target / target_core_base.h
blob5be89373ceac659c92e671a463c80f146656c416
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-rc2-ml"
13 #define TARGET_CORE_VERSION TARGET_CORE_MOD_VERSION
14
15 /* Maximum Number of LUNs per Target Portal Group */
16 /* Don't raise above 511 or REPORT_LUNS needs to handle >1 page */
17 #define TRANSPORT_MAX_LUNS_PER_TPG 256
18 /*
19 * By default we use 32-byte CDBs in TCM Core and subsystem plugin code.
20 *
21 * Note that both include/scsi/scsi_cmnd.h:MAX_COMMAND_SIZE and
22 * include/linux/blkdev.h:BLOCK_MAX_CDB as of v2.6.36-rc4 still use
23 * 16-byte CDBs by default and require an extra allocation for
24 * 32-byte CDBs to because of legacy issues.
25 *
26 * Within TCM Core there are no such legacy limitiations, so we go ahead
27 * use 32-byte CDBs by default and use include/scsi/scsi.h:scsi_command_size()
28 * within all TCM Core and subsystem plugin code.
29 */
30 #define TCM_MAX_COMMAND_SIZE 32
31 /*
32 * From include/scsi/scsi_cmnd.h:SCSI_SENSE_BUFFERSIZE, currently
33 * defined 96, but the real limit is 252 (or 260 including the header)
34 */
35 #define TRANSPORT_SENSE_BUFFER SCSI_SENSE_BUFFERSIZE
36 /* Used by transport_send_check_condition_and_sense() */
37 #define SPC_SENSE_KEY_OFFSET 2
38 #define SPC_ADD_SENSE_LEN_OFFSET 7
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 /* Attempts before moving from SHORT to LONG */
59 #define PYX_TRANSPORT_WINDOW_CLOSED_THRESHOLD 3
60 #define PYX_TRANSPORT_WINDOW_CLOSED_WAIT_SHORT 3 /* In milliseconds */
61 #define PYX_TRANSPORT_WINDOW_CLOSED_WAIT_LONG 10 /* In milliseconds */
62
63 #define PYX_TRANSPORT_STATUS_INTERVAL 5 /* In seconds */
64
65 /*
66 * struct se_subsystem_dev->su_dev_flags
67 */
68 #define SDF_FIRMWARE_VPD_UNIT_SERIAL 0x00000001
69 #define SDF_EMULATED_VPD_UNIT_SERIAL 0x00000002
70 #define SDF_USING_UDEV_PATH 0x00000004
71 #define SDF_USING_ALIAS 0x00000008
72
73 /*
74 * struct se_device->dev_flags
75 */
76 #define DF_SPC2_RESERVATIONS 0x00000001
77 #define DF_SPC2_RESERVATIONS_WITH_ISID 0x00000002
78
79 /* struct se_dev_attrib sanity values */
80 /* Default max_unmap_lba_count */
81 #define DA_MAX_UNMAP_LBA_COUNT 0
82 /* Default max_unmap_block_desc_count */
83 #define DA_MAX_UNMAP_BLOCK_DESC_COUNT 0
84 /* Default unmap_granularity */
85 #define DA_UNMAP_GRANULARITY_DEFAULT 0
86 /* Default unmap_granularity_alignment */
87 #define DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT 0
88 /* Default max transfer length */
89 #define DA_FABRIC_MAX_SECTORS 8192
90 /* Emulation for Direct Page Out */
91 #define DA_EMULATE_DPO 0
92 /* Emulation for Forced Unit Access WRITEs */
93 #define DA_EMULATE_FUA_WRITE 1
94 /* Emulation for Forced Unit Access READs */
95 #define DA_EMULATE_FUA_READ 0
96 /* Emulation for WriteCache and SYNCHRONIZE_CACHE */
97 #define DA_EMULATE_WRITE_CACHE 0
98 /* Emulation for UNIT ATTENTION Interlock Control */
99 #define DA_EMULATE_UA_INTLLCK_CTRL 0
100 /* Emulation for TASK_ABORTED status (TAS) by default */
101 #define DA_EMULATE_TAS 1
102 /* Emulation for Thin Provisioning UNMAP using block/blk-lib.c:blkdev_issue_discard() */
103 #define DA_EMULATE_TPU 0
104 /*
105 * Emulation for Thin Provisioning WRITE_SAME w/ UNMAP=1 bit using
106 * block/blk-lib.c:blkdev_issue_discard()
107 */
108 #define DA_EMULATE_TPWS 0
109 /* No Emulation for PSCSI by default */
110 #define DA_EMULATE_RESERVATIONS 0
111 /* No Emulation for PSCSI by default */
112 #define DA_EMULATE_ALUA 0
113 /* Enforce SCSI Initiator Port TransportID with 'ISID' for PR */
114 #define DA_ENFORCE_PR_ISIDS 1
115 #define DA_STATUS_MAX_SECTORS_MIN 16
116 #define DA_STATUS_MAX_SECTORS_MAX 8192
117 /* By default don't report non-rotating (solid state) medium */
118 #define DA_IS_NONROT 0
119 /* Queue Algorithm Modifier default for restricted reordering in control mode page */
120 #define DA_EMULATE_REST_REORD 0
121
122 #define SE_INQUIRY_BUF 512
123 #define SE_MODE_PAGE_BUF 512
124 #define SE_SENSE_BUF 96
125
126 /* struct se_hba->hba_flags */
127 enum hba_flags_table {
128 HBA_FLAGS_INTERNAL_USE = 0x01,
129 HBA_FLAGS_PSCSI_MODE = 0x02,
130 };
131
132 /* struct se_lun->lun_status */
133 enum transport_lun_status_table {
134 TRANSPORT_LUN_STATUS_FREE = 0,
135 TRANSPORT_LUN_STATUS_ACTIVE = 1,
136 };
137
138 /* struct se_portal_group->se_tpg_type */
139 enum transport_tpg_type_table {
140 TRANSPORT_TPG_TYPE_NORMAL = 0,
141 TRANSPORT_TPG_TYPE_DISCOVERY = 1,
142 };
143
144 /* Special transport agnostic struct se_cmd->t_states */
145 enum transport_state_table {
146 TRANSPORT_NO_STATE = 0,
147 TRANSPORT_NEW_CMD = 1,
148 TRANSPORT_WRITE_PENDING = 3,
149 TRANSPORT_PROCESSING = 5,
150 TRANSPORT_COMPLETE = 6,
151 TRANSPORT_ISTATE_PROCESSING = 11,
152 TRANSPORT_COMPLETE_QF_WP = 18,
153 TRANSPORT_COMPLETE_QF_OK = 19,
154 };
155
156 /* Used for struct se_cmd->se_cmd_flags */
157 enum se_cmd_flags_table {
158 SCF_SUPPORTED_SAM_OPCODE = 0x00000001,
159 SCF_TRANSPORT_TASK_SENSE = 0x00000002,
160 SCF_EMULATED_TASK_SENSE = 0x00000004,
161 SCF_SCSI_DATA_CDB = 0x00000008,
162 SCF_SCSI_TMR_CDB = 0x00000010,
163 SCF_SCSI_CDB_EXCEPTION = 0x00000020,
164 SCF_SCSI_RESERVATION_CONFLICT = 0x00000040,
165 SCF_FUA = 0x00000080,
166 SCF_SE_LUN_CMD = 0x00000100,
167 SCF_BIDI = 0x00000400,
168 SCF_SENT_CHECK_CONDITION = 0x00000800,
169 SCF_OVERFLOW_BIT = 0x00001000,
170 SCF_UNDERFLOW_BIT = 0x00002000,
171 SCF_SENT_DELAYED_TAS = 0x00004000,
172 SCF_ALUA_NON_OPTIMIZED = 0x00008000,
173 SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC = 0x00020000,
174 SCF_ACK_KREF = 0x00040000,
175 };
176
177 /* struct se_dev_entry->lun_flags and struct se_lun->lun_access */
178 enum transport_lunflags_table {
179 TRANSPORT_LUNFLAGS_NO_ACCESS = 0x00,
180 TRANSPORT_LUNFLAGS_INITIATOR_ACCESS = 0x01,
181 TRANSPORT_LUNFLAGS_READ_ONLY = 0x02,
182 TRANSPORT_LUNFLAGS_READ_WRITE = 0x04,
183 };
184
185 /* struct se_device->dev_status */
186 enum transport_device_status_table {
187 TRANSPORT_DEVICE_ACTIVATED = 0x01,
188 TRANSPORT_DEVICE_DEACTIVATED = 0x02,
189 TRANSPORT_DEVICE_QUEUE_FULL = 0x04,
190 TRANSPORT_DEVICE_SHUTDOWN = 0x08,
191 TRANSPORT_DEVICE_OFFLINE_ACTIVATED = 0x10,
192 TRANSPORT_DEVICE_OFFLINE_DEACTIVATED = 0x20,
193 };
194
195 /*
196 * Used by transport_send_check_condition_and_sense() and se_cmd->scsi_sense_reason
197 * to signal which ASC/ASCQ sense payload should be built.
198 */
199 enum tcm_sense_reason_table {
200 TCM_NON_EXISTENT_LUN = 0x01,
201 TCM_UNSUPPORTED_SCSI_OPCODE = 0x02,
202 TCM_INCORRECT_AMOUNT_OF_DATA = 0x03,
203 TCM_UNEXPECTED_UNSOLICITED_DATA = 0x04,
204 TCM_SERVICE_CRC_ERROR = 0x05,
205 TCM_SNACK_REJECTED = 0x06,
206 TCM_SECTOR_COUNT_TOO_MANY = 0x07,
207 TCM_INVALID_CDB_FIELD = 0x08,
208 TCM_INVALID_PARAMETER_LIST = 0x09,
209 TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE = 0x0a,
210 TCM_UNKNOWN_MODE_PAGE = 0x0b,
211 TCM_WRITE_PROTECTED = 0x0c,
212 TCM_CHECK_CONDITION_ABORT_CMD = 0x0d,
213 TCM_CHECK_CONDITION_UNIT_ATTENTION = 0x0e,
214 TCM_CHECK_CONDITION_NOT_READY = 0x0f,
215 TCM_RESERVATION_CONFLICT = 0x10,
216 TCM_ADDRESS_OUT_OF_RANGE = 0x11,
217 };
218
219 enum target_sc_flags_table {
220 TARGET_SCF_BIDI_OP = 0x01,
221 TARGET_SCF_ACK_KREF = 0x02,
222 TARGET_SCF_UNKNOWN_SIZE = 0x04,
223 };
224
225 /* fabric independent task management function values */
226 enum tcm_tmreq_table {
227 TMR_ABORT_TASK = 1,
228 TMR_ABORT_TASK_SET = 2,
229 TMR_CLEAR_ACA = 3,
230 TMR_CLEAR_TASK_SET = 4,
231 TMR_LUN_RESET = 5,
232 TMR_TARGET_WARM_RESET = 6,
233 TMR_TARGET_COLD_RESET = 7,
234 TMR_FABRIC_TMR = 255,
235 };
236
237 /* fabric independent task management response values */
238 enum tcm_tmrsp_table {
239 TMR_FUNCTION_COMPLETE = 0,
240 TMR_TASK_DOES_NOT_EXIST = 1,
241 TMR_LUN_DOES_NOT_EXIST = 2,
242 TMR_TASK_STILL_ALLEGIANT = 3,
243 TMR_TASK_FAILOVER_NOT_SUPPORTED = 4,
244 TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED = 5,
245 TMR_FUNCTION_AUTHORIZATION_FAILED = 6,
246 TMR_FUNCTION_REJECTED = 255,
247 };
248
249 struct se_obj {
250 atomic_t obj_access_count;
251 };
252
253 /*
254 * Used by TCM Core internally to signal if ALUA emulation is enabled or
255 * disabled, or running in with TCM/pSCSI passthrough mode
256 */
257 typedef enum {
258 SPC_ALUA_PASSTHROUGH,
259 SPC2_ALUA_DISABLED,
260 SPC3_ALUA_EMULATED
261 } t10_alua_index_t;
262
263 /*
264 * Used by TCM Core internally to signal if SAM Task Attribute emulation
265 * is enabled or disabled, or running in with TCM/pSCSI passthrough mode
266 */
267 typedef enum {
268 SAM_TASK_ATTR_PASSTHROUGH,
269 SAM_TASK_ATTR_UNTAGGED,
270 SAM_TASK_ATTR_EMULATED
271 } t10_task_attr_index_t;
272
273 /*
274 * Used for target SCSI statistics
275 */
276 typedef enum {
277 SCSI_INST_INDEX,
278 SCSI_DEVICE_INDEX,
279 SCSI_AUTH_INTR_INDEX,
280 SCSI_INDEX_TYPE_MAX
281 } scsi_index_t;
282
283 struct se_cmd;
284
285 struct t10_alua {
286 t10_alua_index_t alua_type;
287 /* ALUA Target Port Group ID */
288 u16 alua_tg_pt_gps_counter;
289 u32 alua_tg_pt_gps_count;
290 spinlock_t tg_pt_gps_lock;
291 struct se_subsystem_dev *t10_sub_dev;
292 /* Used for default ALUA Target Port Group */
293 struct t10_alua_tg_pt_gp *default_tg_pt_gp;
294 /* Used for default ALUA Target Port Group ConfigFS group */
295 struct config_group alua_tg_pt_gps_group;
296 int (*alua_state_check)(struct se_cmd *, unsigned char *, u8 *);
297 struct list_head tg_pt_gps_list;
298 };
299
300 struct t10_alua_lu_gp {
301 u16 lu_gp_id;
302 int lu_gp_valid_id;
303 u32 lu_gp_members;
304 atomic_t lu_gp_ref_cnt;
305 spinlock_t lu_gp_lock;
306 struct config_group lu_gp_group;
307 struct list_head lu_gp_node;
308 struct list_head lu_gp_mem_list;
309 };
310
311 struct t10_alua_lu_gp_member {
312 bool lu_gp_assoc;
313 atomic_t lu_gp_mem_ref_cnt;
314 spinlock_t lu_gp_mem_lock;
315 struct t10_alua_lu_gp *lu_gp;
316 struct se_device *lu_gp_mem_dev;
317 struct list_head lu_gp_mem_list;
318 };
319
320 struct t10_alua_tg_pt_gp {
321 u16 tg_pt_gp_id;
322 int tg_pt_gp_valid_id;
323 int tg_pt_gp_alua_access_status;
324 int tg_pt_gp_alua_access_type;
325 int tg_pt_gp_nonop_delay_msecs;
326 int tg_pt_gp_trans_delay_msecs;
327 int tg_pt_gp_implict_trans_secs;
328 int tg_pt_gp_pref;
329 int tg_pt_gp_write_metadata;
330 /* Used by struct t10_alua_tg_pt_gp->tg_pt_gp_md_buf_len */
331 #define ALUA_MD_BUF_LEN 1024
332 u32 tg_pt_gp_md_buf_len;
333 u32 tg_pt_gp_members;
334 atomic_t tg_pt_gp_alua_access_state;
335 atomic_t tg_pt_gp_ref_cnt;
336 spinlock_t tg_pt_gp_lock;
337 struct mutex tg_pt_gp_md_mutex;
338 struct se_subsystem_dev *tg_pt_gp_su_dev;
339 struct config_group tg_pt_gp_group;
340 struct list_head tg_pt_gp_list;
341 struct list_head tg_pt_gp_mem_list;
342 };
343
344 struct t10_alua_tg_pt_gp_member {
345 bool tg_pt_gp_assoc;
346 atomic_t tg_pt_gp_mem_ref_cnt;
347 spinlock_t tg_pt_gp_mem_lock;
348 struct t10_alua_tg_pt_gp *tg_pt_gp;
349 struct se_port *tg_pt;
350 struct list_head tg_pt_gp_mem_list;
351 };
352
353 struct t10_vpd {
354 unsigned char device_identifier[INQUIRY_VPD_DEVICE_IDENTIFIER_LEN];
355 int protocol_identifier_set;
356 u32 protocol_identifier;
357 u32 device_identifier_code_set;
358 u32 association;
359 u32 device_identifier_type;
360 struct list_head vpd_list;
361 };
362
363 struct t10_wwn {
364 char vendor[8];
365 char model[16];
366 char revision[4];
367 char unit_serial[INQUIRY_VPD_SERIAL_LEN];
368 spinlock_t t10_vpd_lock;
369 struct se_subsystem_dev *t10_sub_dev;
370 struct config_group t10_wwn_group;
371 struct list_head t10_vpd_list;
372 };
373
374
375 /*
376 * Used by TCM Core internally to signal if >= SPC-3 persistent reservations
377 * emulation is enabled or disabled, or running in with TCM/pSCSI passthrough
378 * mode
379 */
380 typedef enum {
381 SPC_PASSTHROUGH,
382 SPC2_RESERVATIONS,
383 SPC3_PERSISTENT_RESERVATIONS
384 } t10_reservations_index_t;
385
386 struct t10_pr_registration {
387 /* Used for fabrics that contain WWN+ISID */
388 #define PR_REG_ISID_LEN 16
389 /* PR_REG_ISID_LEN + ',i,0x' */
390 #define PR_REG_ISID_ID_LEN (PR_REG_ISID_LEN + 5)
391 char pr_reg_isid[PR_REG_ISID_LEN];
392 /* Used during APTPL metadata reading */
393 #define PR_APTPL_MAX_IPORT_LEN 256
394 unsigned char pr_iport[PR_APTPL_MAX_IPORT_LEN];
395 /* Used during APTPL metadata reading */
396 #define PR_APTPL_MAX_TPORT_LEN 256
397 unsigned char pr_tport[PR_APTPL_MAX_TPORT_LEN];
398 /* For writing out live meta data */
399 unsigned char *pr_aptpl_buf;
400 u16 pr_aptpl_rpti;
401 u16 pr_reg_tpgt;
402 /* Reservation effects all target ports */
403 int pr_reg_all_tg_pt;
404 /* Activate Persistence across Target Power Loss */
405 int pr_reg_aptpl;
406 int pr_res_holder;
407 int pr_res_type;
408 int pr_res_scope;
409 /* Used for fabric initiator WWPNs using a ISID */
410 bool isid_present_at_reg;
411 u32 pr_res_mapped_lun;
412 u32 pr_aptpl_target_lun;
413 u32 pr_res_generation;
414 u64 pr_reg_bin_isid;
415 u64 pr_res_key;
416 atomic_t pr_res_holders;
417 struct se_node_acl *pr_reg_nacl;
418 struct se_dev_entry *pr_reg_deve;
419 struct se_lun *pr_reg_tg_pt_lun;
420 struct list_head pr_reg_list;
421 struct list_head pr_reg_abort_list;
422 struct list_head pr_reg_aptpl_list;
423 struct list_head pr_reg_atp_list;
424 struct list_head pr_reg_atp_mem_list;
425 };
426
427 /*
428 * This set of function pointer ops is set based upon SPC3_PERSISTENT_RESERVATIONS,
429 * SPC2_RESERVATIONS or SPC_PASSTHROUGH in drivers/target/target_core_pr.c:
430 * core_setup_reservations()
431 */
432 struct t10_reservation_ops {
433 int (*t10_reservation_check)(struct se_cmd *, u32 *);
434 int (*t10_seq_non_holder)(struct se_cmd *, unsigned char *, u32);
435 int (*t10_pr_register)(struct se_cmd *);
436 int (*t10_pr_clear)(struct se_cmd *);
437 };
438
439 struct t10_reservation {
440 /* Reservation effects all target ports */
441 int pr_all_tg_pt;
442 /* Activate Persistence across Target Power Loss enabled
443 * for SCSI device */
444 int pr_aptpl_active;
445 /* Used by struct t10_reservation->pr_aptpl_buf_len */
446 #define PR_APTPL_BUF_LEN 8192
447 u32 pr_aptpl_buf_len;
448 u32 pr_generation;
449 t10_reservations_index_t res_type;
450 spinlock_t registration_lock;
451 spinlock_t aptpl_reg_lock;
452 /*
453 * This will always be set by one individual I_T Nexus.
454 * However with all_tg_pt=1, other I_T Nexus from the
455 * same initiator can access PR reg/res info on a different
456 * target port.
457 *
458 * There is also the 'All Registrants' case, where there is
459 * a single *pr_res_holder of the reservation, but all
460 * registrations are considered reservation holders.
461 */
462 struct se_node_acl *pr_res_holder;
463 struct list_head registration_list;
464 struct list_head aptpl_reg_list;
465 struct t10_reservation_ops pr_ops;
466 };
467
468 struct se_tmr_req {
469 /* Task Management function to be performed */
470 u8 function;
471 /* Task Management response to send */
472 u8 response;
473 int call_transport;
474 /* Reference to ITT that Task Mgmt should be performed */
475 u32 ref_task_tag;
476 void *fabric_tmr_ptr;
477 struct se_cmd *task_cmd;
478 struct se_device *tmr_dev;
479 struct se_lun *tmr_lun;
480 struct list_head tmr_list;
481 };
482
483 struct se_cmd {
484 /* SAM response code being sent to initiator */
485 u8 scsi_status;
486 u8 scsi_asc;
487 u8 scsi_ascq;
488 u8 scsi_sense_reason;
489 u16 scsi_sense_length;
490 /* Delay for ALUA Active/NonOptimized state access in milliseconds */
491 int alua_nonop_delay;
492 /* See include/linux/dma-mapping.h */
493 enum dma_data_direction data_direction;
494 /* For SAM Task Attribute */
495 int sam_task_attr;
496 /* Transport protocol dependent state, see transport_state_table */
497 enum transport_state_table t_state;
498 /* Used to signal cmd->se_tfo->check_release_cmd() usage per cmd */
499 unsigned check_release:1;
500 unsigned cmd_wait_set:1;
501 unsigned unknown_data_length:1;
502 /* See se_cmd_flags_table */
503 u32 se_cmd_flags;
504 u32 se_ordered_id;
505 /* Total size in bytes associated with command */
506 u32 data_length;
507 u32 residual_count;
508 u32 orig_fe_lun;
509 /* Persistent Reservation key */
510 u64 pr_res_key;
511 /* Used for sense data */
512 void *sense_buffer;
513 struct list_head se_delayed_node;
514 struct list_head se_lun_node;
515 struct list_head se_qf_node;
516 struct se_device *se_dev;
517 struct se_dev_entry *se_deve;
518 struct se_lun *se_lun;
519 /* Only used for internal passthrough and legacy TCM fabric modules */
520 struct se_session *se_sess;
521 struct se_tmr_req *se_tmr_req;
522 struct list_head se_cmd_list;
523 struct completion cmd_wait_comp;
524 struct kref cmd_kref;
525 struct target_core_fabric_ops *se_tfo;
526 int (*execute_cmd)(struct se_cmd *);
527 void (*transport_complete_callback)(struct se_cmd *);
528
529 unsigned char *t_task_cdb;
530 unsigned char __t_task_cdb[TCM_MAX_COMMAND_SIZE];
531 unsigned long long t_task_lba;
532 atomic_t t_fe_count;
533 unsigned int transport_state;
534 #define CMD_T_ABORTED (1 << 0)
535 #define CMD_T_ACTIVE (1 << 1)
536 #define CMD_T_COMPLETE (1 << 2)
537 #define CMD_T_QUEUED (1 << 3)
538 #define CMD_T_SENT (1 << 4)
539 #define CMD_T_STOP (1 << 5)
540 #define CMD_T_FAILED (1 << 6)
541 #define CMD_T_LUN_STOP (1 << 7)
542 #define CMD_T_LUN_FE_STOP (1 << 8)
543 #define CMD_T_DEV_ACTIVE (1 << 9)
544 #define CMD_T_REQUEST_STOP (1 << 10)
545 #define CMD_T_BUSY (1 << 11)
546 spinlock_t t_state_lock;
547 struct completion t_transport_stop_comp;
548 struct completion transport_lun_fe_stop_comp;
549 struct completion transport_lun_stop_comp;
550
551 struct work_struct work;
552
553 struct scatterlist *t_data_sg;
554 unsigned int t_data_nents;
555 void *t_data_vmap;
556 struct scatterlist *t_bidi_data_sg;
557 unsigned int t_bidi_data_nents;
558
559 struct list_head state_list;
560 bool state_active;
561
562 /* old task stop completion, consider merging with some of the above */
563 struct completion task_stop_comp;
564
565 /* backend private data */
566 void *priv;
567 };
568
569 struct se_ua {
570 u8 ua_asc;
571 u8 ua_ascq;
572 struct se_node_acl *ua_nacl;
573 struct list_head ua_dev_list;
574 struct list_head ua_nacl_list;
575 };
576
577 struct se_node_acl {
578 char initiatorname[TRANSPORT_IQN_LEN];
579 /* Used to signal demo mode created ACL, disabled by default */
580 bool dynamic_node_acl;
581 bool acl_stop:1;
582 u32 queue_depth;
583 u32 acl_index;
584 u64 num_cmds;
585 u64 read_bytes;
586 u64 write_bytes;
587 spinlock_t stats_lock;
588 /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
589 atomic_t acl_pr_ref_count;
590 struct se_dev_entry **device_list;
591 struct se_session *nacl_sess;
592 struct se_portal_group *se_tpg;
593 spinlock_t device_list_lock;
594 spinlock_t nacl_sess_lock;
595 struct config_group acl_group;
596 struct config_group acl_attrib_group;
597 struct config_group acl_auth_group;
598 struct config_group acl_param_group;
599 struct config_group acl_fabric_stat_group;
600 struct config_group *acl_default_groups[5];
601 struct list_head acl_list;
602 struct list_head acl_sess_list;
603 struct completion acl_free_comp;
604 struct kref acl_kref;
605 };
606
607 struct se_session {
608 unsigned sess_tearing_down:1;
609 u64 sess_bin_isid;
610 struct se_node_acl *se_node_acl;
611 struct se_portal_group *se_tpg;
612 void *fabric_sess_ptr;
613 struct list_head sess_list;
614 struct list_head sess_acl_list;
615 struct list_head sess_cmd_list;
616 spinlock_t sess_cmd_lock;
617 struct kref sess_kref;
618 };
619
620 struct se_device;
621 struct se_transform_info;
622 struct scatterlist;
623
624 struct se_ml_stat_grps {
625 struct config_group stat_group;
626 struct config_group scsi_auth_intr_group;
627 struct config_group scsi_att_intr_port_group;
628 };
629
630 struct se_lun_acl {
631 char initiatorname[TRANSPORT_IQN_LEN];
632 u32 mapped_lun;
633 struct se_node_acl *se_lun_nacl;
634 struct se_lun *se_lun;
635 struct list_head lacl_list;
636 struct config_group se_lun_group;
637 struct se_ml_stat_grps ml_stat_grps;
638 };
639
640 struct se_dev_entry {
641 bool def_pr_registered;
642 /* See transport_lunflags_table */
643 u32 lun_flags;
644 u32 deve_cmds;
645 u32 mapped_lun;
646 u32 average_bytes;
647 u32 last_byte_count;
648 u32 total_cmds;
649 u32 total_bytes;
650 u64 pr_res_key;
651 u64 creation_time;
652 u32 attach_count;
653 u64 read_bytes;
654 u64 write_bytes;
655 atomic_t ua_count;
656 /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
657 atomic_t pr_ref_count;
658 struct se_lun_acl *se_lun_acl;
659 spinlock_t ua_lock;
660 struct se_lun *se_lun;
661 struct list_head alua_port_list;
662 struct list_head ua_list;
663 };
664
665 struct se_dev_limits {
666 /* Max supported HW queue depth */
667 u32 hw_queue_depth;
668 /* Max supported virtual queue depth */
669 u32 queue_depth;
670 /* From include/linux/blkdev.h for the other HW/SW limits. */
671 struct queue_limits limits;
672 };
673
674 struct se_dev_attrib {
675 int emulate_dpo;
676 int emulate_fua_write;
677 int emulate_fua_read;
678 int emulate_write_cache;
679 int emulate_ua_intlck_ctrl;
680 int emulate_tas;
681 int emulate_tpu;
682 int emulate_tpws;
683 int emulate_reservations;
684 int emulate_alua;
685 int enforce_pr_isids;
686 int is_nonrot;
687 int emulate_rest_reord;
688 u32 hw_block_size;
689 u32 block_size;
690 u32 hw_max_sectors;
691 u32 fabric_max_sectors;
692 u32 optimal_sectors;
693 u32 hw_queue_depth;
694 u32 queue_depth;
695 u32 max_unmap_lba_count;
696 u32 max_unmap_block_desc_count;
697 u32 unmap_granularity;
698 u32 unmap_granularity_alignment;
699 struct se_subsystem_dev *da_sub_dev;
700 struct config_group da_group;
701 };
702
703 struct se_dev_stat_grps {
704 struct config_group stat_group;
705 struct config_group scsi_dev_group;
706 struct config_group scsi_tgt_dev_group;
707 struct config_group scsi_lu_group;
708 };
709
710 struct se_subsystem_dev {
711 /* Used for struct se_subsystem_dev-->se_dev_alias, must be less than PAGE_SIZE */
712 #define SE_DEV_ALIAS_LEN 512
713 unsigned char se_dev_alias[SE_DEV_ALIAS_LEN];
714 /* Used for struct se_subsystem_dev->se_dev_udev_path[], must be less than PAGE_SIZE */
715 #define SE_UDEV_PATH_LEN 512
716 unsigned char se_dev_udev_path[SE_UDEV_PATH_LEN];
717 u32 su_dev_flags;
718 struct se_hba *se_dev_hba;
719 struct se_device *se_dev_ptr;
720 struct se_dev_attrib se_dev_attrib;
721 /* T10 Asymmetric Logical Unit Assignment for Target Ports */
722 struct t10_alua t10_alua;
723 /* T10 Inquiry and VPD WWN Information */
724 struct t10_wwn t10_wwn;
725 /* T10 SPC-2 + SPC-3 Reservations */
726 struct t10_reservation t10_pr;
727 spinlock_t se_dev_lock;
728 void *se_dev_su_ptr;
729 struct config_group se_dev_group;
730 /* For T10 Reservations */
731 struct config_group se_dev_pr_group;
732 /* For target_core_stat.c groups */
733 struct se_dev_stat_grps dev_stat_grps;
734 };
735
736 struct se_device {
737 /* RELATIVE TARGET PORT IDENTIFER Counter */
738 u16 dev_rpti_counter;
739 /* Used for SAM Task Attribute ordering */
740 u32 dev_cur_ordered_id;
741 u32 dev_flags;
742 u32 dev_port_count;
743 /* See transport_device_status_table */
744 u32 dev_status;
745 /* Physical device queue depth */
746 u32 queue_depth;
747 /* Used for SPC-2 reservations enforce of ISIDs */
748 u64 dev_res_bin_isid;
749 t10_task_attr_index_t dev_task_attr_type;
750 /* Pointer to transport specific device structure */
751 void *dev_ptr;
752 u32 dev_index;
753 u64 creation_time;
754 u32 num_resets;
755 u64 num_cmds;
756 u64 read_bytes;
757 u64 write_bytes;
758 spinlock_t stats_lock;
759 /* Active commands on this virtual SE device */
760 atomic_t simple_cmds;
761 atomic_t dev_ordered_id;
762 atomic_t dev_ordered_sync;
763 atomic_t dev_qf_count;
764 struct se_obj dev_obj;
765 struct se_obj dev_access_obj;
766 struct se_obj dev_export_obj;
767 spinlock_t delayed_cmd_lock;
768 spinlock_t execute_task_lock;
769 spinlock_t dev_reservation_lock;
770 spinlock_t dev_status_lock;
771 spinlock_t se_port_lock;
772 spinlock_t se_tmr_lock;
773 spinlock_t qf_cmd_lock;
774 /* Used for legacy SPC-2 reservationsa */
775 struct se_node_acl *dev_reserved_node_acl;
776 /* Used for ALUA Logical Unit Group membership */
777 struct t10_alua_lu_gp_member *dev_alua_lu_gp_mem;
778 /* Used for SPC-3 Persistent Reservations */
779 struct t10_pr_registration *dev_pr_res_holder;
780 struct list_head dev_sep_list;
781 struct list_head dev_tmr_list;
782 struct workqueue_struct *tmr_wq;
783 struct work_struct qf_work_queue;
784 struct list_head delayed_cmd_list;
785 struct list_head state_list;
786 struct list_head qf_cmd_list;
787 /* Pointer to associated SE HBA */
788 struct se_hba *se_hba;
789 struct se_subsystem_dev *se_sub_dev;
790 /* Pointer to template of function pointers for transport */
791 struct se_subsystem_api *transport;
792 /* Linked list for struct se_hba struct se_device list */
793 struct list_head dev_list;
794 };
795
796 struct se_hba {
797 u16 hba_tpgt;
798 u32 hba_id;
799 /* See hba_flags_table */
800 u32 hba_flags;
801 /* Virtual iSCSI devices attached. */
802 u32 dev_count;
803 u32 hba_index;
804 /* Pointer to transport specific host structure. */
805 void *hba_ptr;
806 /* Linked list for struct se_device */
807 struct list_head hba_dev_list;
808 struct list_head hba_node;
809 spinlock_t device_lock;
810 struct config_group hba_group;
811 struct mutex hba_access_mutex;
812 struct se_subsystem_api *transport;
813 };
814
815 struct se_port_stat_grps {
816 struct config_group stat_group;
817 struct config_group scsi_port_group;
818 struct config_group scsi_tgt_port_group;
819 struct config_group scsi_transport_group;
820 };
821
822 struct se_lun {
823 /* See transport_lun_status_table */
824 enum transport_lun_status_table lun_status;
825 u32 lun_access;
826 u32 lun_flags;
827 u32 unpacked_lun;
828 atomic_t lun_acl_count;
829 spinlock_t lun_acl_lock;
830 spinlock_t lun_cmd_lock;
831 spinlock_t lun_sep_lock;
832 struct completion lun_shutdown_comp;
833 struct list_head lun_cmd_list;
834 struct list_head lun_acl_list;
835 struct se_device *lun_se_dev;
836 struct se_port *lun_sep;
837 struct config_group lun_group;
838 struct se_port_stat_grps port_stat_grps;
839 };
840
841 struct scsi_port_stats {
842 u64 cmd_pdus;
843 u64 tx_data_octets;
844 u64 rx_data_octets;
845 };
846
847 struct se_port {
848 /* RELATIVE TARGET PORT IDENTIFER */
849 u16 sep_rtpi;
850 int sep_tg_pt_secondary_stat;
851 int sep_tg_pt_secondary_write_md;
852 u32 sep_index;
853 struct scsi_port_stats sep_stats;
854 /* Used for ALUA Target Port Groups membership */
855 atomic_t sep_tg_pt_secondary_offline;
856 /* Used for PR ALL_TG_PT=1 */
857 atomic_t sep_tg_pt_ref_cnt;
858 spinlock_t sep_alua_lock;
859 struct mutex sep_tg_pt_md_mutex;
860 struct t10_alua_tg_pt_gp_member *sep_alua_tg_pt_gp_mem;
861 struct se_lun *sep_lun;
862 struct se_portal_group *sep_tpg;
863 struct list_head sep_alua_list;
864 struct list_head sep_list;
865 };
866
867 struct se_tpg_np {
868 struct se_portal_group *tpg_np_parent;
869 struct config_group tpg_np_group;
870 };
871
872 struct se_portal_group {
873 /* Type of target portal group, see transport_tpg_type_table */
874 enum transport_tpg_type_table se_tpg_type;
875 /* Number of ACLed Initiator Nodes for this TPG */
876 u32 num_node_acls;
877 /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
878 atomic_t tpg_pr_ref_count;
879 /* Spinlock for adding/removing ACLed Nodes */
880 spinlock_t acl_node_lock;
881 /* Spinlock for adding/removing sessions */
882 spinlock_t session_lock;
883 spinlock_t tpg_lun_lock;
884 /* Pointer to $FABRIC_MOD portal group */
885 void *se_tpg_fabric_ptr;
886 struct list_head se_tpg_node;
887 /* linked list for initiator ACL list */
888 struct list_head acl_node_list;
889 struct se_lun **tpg_lun_list;
890 struct se_lun tpg_virt_lun0;
891 /* List of TCM sessions associated wth this TPG */
892 struct list_head tpg_sess_list;
893 /* Pointer to $FABRIC_MOD dependent code */
894 struct target_core_fabric_ops *se_tpg_tfo;
895 struct se_wwn *se_tpg_wwn;
896 struct config_group tpg_group;
897 struct config_group *tpg_default_groups[6];
898 struct config_group tpg_lun_group;
899 struct config_group tpg_np_group;
900 struct config_group tpg_acl_group;
901 struct config_group tpg_attrib_group;
902 struct config_group tpg_param_group;
903 };
904
905 struct se_wwn {
906 struct target_fabric_configfs *wwn_tf;
907 struct config_group wwn_group;
908 struct config_group *wwn_default_groups[2];
909 struct config_group fabric_stat_group;
910 };
911
912 #endif /* TARGET_CORE_BASE_H */
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