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TOMOYO Linux Cross Reference
Linux/include/target/target_core_base.h

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  1 #ifndef TARGET_CORE_BASE_H
  2 #define TARGET_CORE_BASE_H
  3 
  4 #include <linux/in.h>
  5 #include <linux/configfs.h>
  6 #include <linux/dma-mapping.h>
  7 #include <linux/blkdev.h>
  8 #include <linux/percpu_ida.h>
  9 #include <scsi/scsi_cmnd.h>
 10 #include <net/sock.h>
 11 #include <net/tcp.h>
 12 
 13 #define TARGET_CORE_MOD_VERSION         "v4.1.0"
 14 #define TARGET_CORE_VERSION             TARGET_CORE_MOD_VERSION
 15 
 16 /* Maximum Number of LUNs per Target Portal Group */
 17 /* Don't raise above 511 or REPORT_LUNS needs to handle >1 page */
 18 #define TRANSPORT_MAX_LUNS_PER_TPG              256
 19 /*
 20  * By default we use 32-byte CDBs in TCM Core and subsystem plugin code.
 21  *
 22  * Note that both include/scsi/scsi_cmnd.h:MAX_COMMAND_SIZE and
 23  * include/linux/blkdev.h:BLOCK_MAX_CDB as of v2.6.36-rc4 still use
 24  * 16-byte CDBs by default and require an extra allocation for
 25  * 32-byte CDBs to because of legacy issues.
 26  *
 27  * Within TCM Core there are no such legacy limitiations, so we go ahead
 28  * use 32-byte CDBs by default and use include/scsi/scsi.h:scsi_command_size()
 29  * within all TCM Core and subsystem plugin code.
 30  */
 31 #define TCM_MAX_COMMAND_SIZE                    32
 32 /*
 33  * From include/scsi/scsi_cmnd.h:SCSI_SENSE_BUFFERSIZE, currently
 34  * defined 96, but the real limit is 252 (or 260 including the header)
 35  */
 36 #define TRANSPORT_SENSE_BUFFER                  SCSI_SENSE_BUFFERSIZE
 37 /* Used by transport_send_check_condition_and_sense() */
 38 #define SPC_SENSE_KEY_OFFSET                    2
 39 #define SPC_ADD_SENSE_LEN_OFFSET                7
 40 #define SPC_DESC_TYPE_OFFSET                    8
 41 #define SPC_ADDITIONAL_DESC_LEN_OFFSET          9
 42 #define SPC_VALIDITY_OFFSET                     10
 43 #define SPC_ASC_KEY_OFFSET                      12
 44 #define SPC_ASCQ_KEY_OFFSET                     13
 45 #define TRANSPORT_IQN_LEN                       224
 46 /* Used by target_core_store_alua_lu_gp() and target_core_alua_lu_gp_show_attr_members() */
 47 #define LU_GROUP_NAME_BUF                       256
 48 /* Used by core_alua_store_tg_pt_gp_info() and target_core_alua_tg_pt_gp_show_attr_members() */
 49 #define TG_PT_GROUP_NAME_BUF                    256
 50 /* Used to parse VPD into struct t10_vpd */
 51 #define VPD_TMP_BUF_SIZE                        254
 52 /* Used by transport_generic_cmd_sequencer() */
 53 #define READ_BLOCK_LEN                          6
 54 #define READ_CAP_LEN                            8
 55 #define READ_POSITION_LEN                       20
 56 #define INQUIRY_LEN                             36
 57 /* Used by transport_get_inquiry_vpd_serial() */
 58 #define INQUIRY_VPD_SERIAL_LEN                  254
 59 /* Used by transport_get_inquiry_vpd_device_ident() */
 60 #define INQUIRY_VPD_DEVICE_IDENTIFIER_LEN       254
 61 
 62 /* Attempts before moving from SHORT to LONG */
 63 #define PYX_TRANSPORT_WINDOW_CLOSED_THRESHOLD   3
 64 #define PYX_TRANSPORT_WINDOW_CLOSED_WAIT_SHORT  3  /* In milliseconds */
 65 #define PYX_TRANSPORT_WINDOW_CLOSED_WAIT_LONG   10 /* In milliseconds */
 66 
 67 #define PYX_TRANSPORT_STATUS_INTERVAL           5 /* In seconds */
 68 
 69 /* struct se_dev_attrib sanity values */
 70 /* Default max_unmap_lba_count */
 71 #define DA_MAX_UNMAP_LBA_COUNT                  0
 72 /* Default max_unmap_block_desc_count */
 73 #define DA_MAX_UNMAP_BLOCK_DESC_COUNT           0
 74 /* Default unmap_granularity */
 75 #define DA_UNMAP_GRANULARITY_DEFAULT            0
 76 /* Default unmap_granularity_alignment */
 77 #define DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT  0
 78 /* Default max_write_same_len, disabled by default */
 79 #define DA_MAX_WRITE_SAME_LEN                   0
 80 /* Use a model alias based on the configfs backend device name */
 81 #define DA_EMULATE_MODEL_ALIAS                  0
 82 /* Emulation for Direct Page Out */
 83 #define DA_EMULATE_DPO                          0
 84 /* Emulation for Forced Unit Access WRITEs */
 85 #define DA_EMULATE_FUA_WRITE                    1
 86 /* Emulation for Forced Unit Access READs */
 87 #define DA_EMULATE_FUA_READ                     0
 88 /* Emulation for WriteCache and SYNCHRONIZE_CACHE */
 89 #define DA_EMULATE_WRITE_CACHE                  0
 90 /* Emulation for UNIT ATTENTION Interlock Control */
 91 #define DA_EMULATE_UA_INTLLCK_CTRL              0
 92 /* Emulation for TASK_ABORTED status (TAS) by default */
 93 #define DA_EMULATE_TAS                          1
 94 /* Emulation for Thin Provisioning UNMAP using block/blk-lib.c:blkdev_issue_discard() */
 95 #define DA_EMULATE_TPU                          0
 96 /*
 97  * Emulation for Thin Provisioning WRITE_SAME w/ UNMAP=1 bit using
 98  * block/blk-lib.c:blkdev_issue_discard()
 99  */
100 #define DA_EMULATE_TPWS                         0
101 /* Emulation for CompareAndWrite (AtomicTestandSet) by default */
102 #define DA_EMULATE_CAW                          1
103 /* Emulation for 3rd Party Copy (ExtendedCopy) by default */
104 #define DA_EMULATE_3PC                          1
105 /* No Emulation for PSCSI by default */
106 #define DA_EMULATE_ALUA                         0
107 /* Enforce SCSI Initiator Port TransportID with 'ISID' for PR */
108 #define DA_ENFORCE_PR_ISIDS                     1
109 /* Force SPC-3 PR Activate Persistence across Target Power Loss */
110 #define DA_FORCE_PR_APTPL                       0
111 #define DA_STATUS_MAX_SECTORS_MIN               16
112 #define DA_STATUS_MAX_SECTORS_MAX               8192
113 /* By default don't report non-rotating (solid state) medium */
114 #define DA_IS_NONROT                            0
115 /* Queue Algorithm Modifier default for restricted reordering in control mode page */
116 #define DA_EMULATE_REST_REORD                   0
117 
118 #define SE_INQUIRY_BUF                          1024
119 #define SE_MODE_PAGE_BUF                        512
120 #define SE_SENSE_BUF                            96
121 
122 /* struct se_hba->hba_flags */
123 enum hba_flags_table {
124         HBA_FLAGS_INTERNAL_USE  = 0x01,
125         HBA_FLAGS_PSCSI_MODE    = 0x02,
126 };
127 
128 /* struct se_lun->lun_status */
129 enum transport_lun_status_table {
130         TRANSPORT_LUN_STATUS_FREE = 0,
131         TRANSPORT_LUN_STATUS_ACTIVE = 1,
132 };
133 
134 /* struct se_portal_group->se_tpg_type */
135 enum transport_tpg_type_table {
136         TRANSPORT_TPG_TYPE_NORMAL = 0,
137         TRANSPORT_TPG_TYPE_DISCOVERY = 1,
138 };
139 
140 /* Special transport agnostic struct se_cmd->t_states */
141 enum transport_state_table {
142         TRANSPORT_NO_STATE      = 0,
143         TRANSPORT_NEW_CMD       = 1,
144         TRANSPORT_WRITE_PENDING = 3,
145         TRANSPORT_PROCESSING    = 5,
146         TRANSPORT_COMPLETE      = 6,
147         TRANSPORT_ISTATE_PROCESSING = 11,
148         TRANSPORT_COMPLETE_QF_WP = 18,
149         TRANSPORT_COMPLETE_QF_OK = 19,
150 };
151 
152 /* Used for struct se_cmd->se_cmd_flags */
153 enum se_cmd_flags_table {
154         SCF_SUPPORTED_SAM_OPCODE        = 0x00000001,
155         SCF_TRANSPORT_TASK_SENSE        = 0x00000002,
156         SCF_EMULATED_TASK_SENSE         = 0x00000004,
157         SCF_SCSI_DATA_CDB               = 0x00000008,
158         SCF_SCSI_TMR_CDB                = 0x00000010,
159         SCF_FUA                         = 0x00000080,
160         SCF_SE_LUN_CMD                  = 0x00000100,
161         SCF_BIDI                        = 0x00000400,
162         SCF_SENT_CHECK_CONDITION        = 0x00000800,
163         SCF_OVERFLOW_BIT                = 0x00001000,
164         SCF_UNDERFLOW_BIT               = 0x00002000,
165         SCF_SEND_DELAYED_TAS            = 0x00004000,
166         SCF_ALUA_NON_OPTIMIZED          = 0x00008000,
167         SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC = 0x00020000,
168         SCF_ACK_KREF                    = 0x00040000,
169         SCF_COMPARE_AND_WRITE           = 0x00080000,
170         SCF_COMPARE_AND_WRITE_POST      = 0x00100000,
171         SCF_CMD_XCOPY_PASSTHROUGH       = 0x00200000,
172 };
173 
174 /* struct se_dev_entry->lun_flags and struct se_lun->lun_access */
175 enum transport_lunflags_table {
176         TRANSPORT_LUNFLAGS_NO_ACCESS            = 0x00,
177         TRANSPORT_LUNFLAGS_INITIATOR_ACCESS     = 0x01,
178         TRANSPORT_LUNFLAGS_READ_ONLY            = 0x02,
179         TRANSPORT_LUNFLAGS_READ_WRITE           = 0x04,
180 };
181 
182 /*
183  * Used by transport_send_check_condition_and_sense()
184  * to signal which ASC/ASCQ sense payload should be built.
185  */
186 typedef unsigned __bitwise__ sense_reason_t;
187 
188 enum tcm_sense_reason_table {
189 #define R(x)    (__force sense_reason_t )(x)
190         TCM_NO_SENSE                            = R(0x00),
191         TCM_NON_EXISTENT_LUN                    = R(0x01),
192         TCM_UNSUPPORTED_SCSI_OPCODE             = R(0x02),
193         TCM_INCORRECT_AMOUNT_OF_DATA            = R(0x03),
194         TCM_UNEXPECTED_UNSOLICITED_DATA         = R(0x04),
195         TCM_SERVICE_CRC_ERROR                   = R(0x05),
196         TCM_SNACK_REJECTED                      = R(0x06),
197         TCM_SECTOR_COUNT_TOO_MANY               = R(0x07),
198         TCM_INVALID_CDB_FIELD                   = R(0x08),
199         TCM_INVALID_PARAMETER_LIST              = R(0x09),
200         TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE  = R(0x0a),
201         TCM_UNKNOWN_MODE_PAGE                   = R(0x0b),
202         TCM_WRITE_PROTECTED                     = R(0x0c),
203         TCM_CHECK_CONDITION_ABORT_CMD           = R(0x0d),
204         TCM_CHECK_CONDITION_UNIT_ATTENTION      = R(0x0e),
205         TCM_CHECK_CONDITION_NOT_READY           = R(0x0f),
206         TCM_RESERVATION_CONFLICT                = R(0x10),
207         TCM_ADDRESS_OUT_OF_RANGE                = R(0x11),
208         TCM_OUT_OF_RESOURCES                    = R(0x12),
209         TCM_PARAMETER_LIST_LENGTH_ERROR         = R(0x13),
210         TCM_MISCOMPARE_VERIFY                   = R(0x14),
211         TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED    = R(0x15),
212         TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED  = R(0x16),
213         TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED  = R(0x17),
214 #undef R
215 };
216 
217 enum target_sc_flags_table {
218         TARGET_SCF_BIDI_OP              = 0x01,
219         TARGET_SCF_ACK_KREF             = 0x02,
220         TARGET_SCF_UNKNOWN_SIZE         = 0x04,
221 };
222 
223 /* fabric independent task management function values */
224 enum tcm_tmreq_table {
225         TMR_ABORT_TASK          = 1,
226         TMR_ABORT_TASK_SET      = 2,
227         TMR_CLEAR_ACA           = 3,
228         TMR_CLEAR_TASK_SET      = 4,
229         TMR_LUN_RESET           = 5,
230         TMR_TARGET_WARM_RESET   = 6,
231         TMR_TARGET_COLD_RESET   = 7,
232 };
233 
234 /* fabric independent task management response values */
235 enum tcm_tmrsp_table {
236         TMR_FUNCTION_FAILED             = 0,
237         TMR_FUNCTION_COMPLETE           = 1,
238         TMR_TASK_DOES_NOT_EXIST         = 2,
239         TMR_LUN_DOES_NOT_EXIST          = 3,
240         TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED    = 4,
241         TMR_FUNCTION_REJECTED           = 5,
242 };
243 
244 /*
245  * Used for target SCSI statistics
246  */
247 typedef enum {
248         SCSI_INST_INDEX,
249         SCSI_DEVICE_INDEX,
250         SCSI_AUTH_INTR_INDEX,
251         SCSI_INDEX_TYPE_MAX
252 } scsi_index_t;
253 
254 struct se_cmd;
255 
256 struct t10_alua_lba_map_member {
257         struct list_head lba_map_mem_list;
258         int lba_map_mem_alua_state;
259         int lba_map_mem_alua_pg_id;
260 };
261 
262 struct t10_alua_lba_map {
263         u64 lba_map_first_lba;
264         u64 lba_map_last_lba;
265         struct list_head lba_map_list;
266         struct list_head lba_map_mem_list;
267 };
268 
269 struct t10_alua {
270         /* ALUA Target Port Group ID */
271         u16     alua_tg_pt_gps_counter;
272         u32     alua_tg_pt_gps_count;
273         /* Referrals support */
274         spinlock_t lba_map_lock;
275         u32     lba_map_segment_size;
276         u32     lba_map_segment_multiplier;
277         struct list_head lba_map_list;
278         spinlock_t tg_pt_gps_lock;
279         struct se_device *t10_dev;
280         /* Used for default ALUA Target Port Group */
281         struct t10_alua_tg_pt_gp *default_tg_pt_gp;
282         /* Used for default ALUA Target Port Group ConfigFS group */
283         struct config_group alua_tg_pt_gps_group;
284         struct list_head tg_pt_gps_list;
285 };
286 
287 struct t10_alua_lu_gp {
288         u16     lu_gp_id;
289         int     lu_gp_valid_id;
290         u32     lu_gp_members;
291         atomic_t lu_gp_ref_cnt;
292         spinlock_t lu_gp_lock;
293         struct config_group lu_gp_group;
294         struct list_head lu_gp_node;
295         struct list_head lu_gp_mem_list;
296 };
297 
298 struct t10_alua_lu_gp_member {
299         bool lu_gp_assoc;
300         atomic_t lu_gp_mem_ref_cnt;
301         spinlock_t lu_gp_mem_lock;
302         struct t10_alua_lu_gp *lu_gp;
303         struct se_device *lu_gp_mem_dev;
304         struct list_head lu_gp_mem_list;
305 };
306 
307 struct t10_alua_tg_pt_gp {
308         u16     tg_pt_gp_id;
309         int     tg_pt_gp_valid_id;
310         int     tg_pt_gp_alua_supported_states;
311         int     tg_pt_gp_alua_pending_state;
312         int     tg_pt_gp_alua_previous_state;
313         int     tg_pt_gp_alua_access_status;
314         int     tg_pt_gp_alua_access_type;
315         int     tg_pt_gp_nonop_delay_msecs;
316         int     tg_pt_gp_trans_delay_msecs;
317         int     tg_pt_gp_implicit_trans_secs;
318         int     tg_pt_gp_pref;
319         int     tg_pt_gp_write_metadata;
320         u32     tg_pt_gp_members;
321         atomic_t tg_pt_gp_alua_access_state;
322         atomic_t tg_pt_gp_ref_cnt;
323         spinlock_t tg_pt_gp_lock;
324         struct mutex tg_pt_gp_md_mutex;
325         struct se_device *tg_pt_gp_dev;
326         struct config_group tg_pt_gp_group;
327         struct list_head tg_pt_gp_list;
328         struct list_head tg_pt_gp_mem_list;
329         struct se_port *tg_pt_gp_alua_port;
330         struct se_node_acl *tg_pt_gp_alua_nacl;
331         struct delayed_work tg_pt_gp_transition_work;
332         struct completion *tg_pt_gp_transition_complete;
333 };
334 
335 struct t10_alua_tg_pt_gp_member {
336         bool tg_pt_gp_assoc;
337         atomic_t tg_pt_gp_mem_ref_cnt;
338         spinlock_t tg_pt_gp_mem_lock;
339         struct t10_alua_tg_pt_gp *tg_pt_gp;
340         struct se_port *tg_pt;
341         struct list_head tg_pt_gp_mem_list;
342 };
343 
344 struct t10_vpd {
345         unsigned char device_identifier[INQUIRY_VPD_DEVICE_IDENTIFIER_LEN];
346         int protocol_identifier_set;
347         u32 protocol_identifier;
348         u32 device_identifier_code_set;
349         u32 association;
350         u32 device_identifier_type;
351         struct list_head vpd_list;
352 };
353 
354 struct t10_wwn {
355         char vendor[8];
356         char model[16];
357         char revision[4];
358         char unit_serial[INQUIRY_VPD_SERIAL_LEN];
359         spinlock_t t10_vpd_lock;
360         struct se_device *t10_dev;
361         struct config_group t10_wwn_group;
362         struct list_head t10_vpd_list;
363 };
364 
365 struct t10_pr_registration {
366         /* Used for fabrics that contain WWN+ISID */
367 #define PR_REG_ISID_LEN                         16
368         /* PR_REG_ISID_LEN + ',i,0x' */
369 #define PR_REG_ISID_ID_LEN                      (PR_REG_ISID_LEN + 5)
370         char pr_reg_isid[PR_REG_ISID_LEN];
371         /* Used during APTPL metadata reading */
372 #define PR_APTPL_MAX_IPORT_LEN                  256
373         unsigned char pr_iport[PR_APTPL_MAX_IPORT_LEN];
374         /* Used during APTPL metadata reading */
375 #define PR_APTPL_MAX_TPORT_LEN                  256
376         unsigned char pr_tport[PR_APTPL_MAX_TPORT_LEN];
377         u16 pr_aptpl_rpti;
378         u16 pr_reg_tpgt;
379         /* Reservation effects all target ports */
380         int pr_reg_all_tg_pt;
381         /* Activate Persistence across Target Power Loss */
382         int pr_reg_aptpl;
383         int pr_res_holder;
384         int pr_res_type;
385         int pr_res_scope;
386         /* Used for fabric initiator WWPNs using a ISID */
387         bool isid_present_at_reg;
388         u32 pr_res_mapped_lun;
389         u32 pr_aptpl_target_lun;
390         u32 pr_res_generation;
391         u64 pr_reg_bin_isid;
392         u64 pr_res_key;
393         atomic_t pr_res_holders;
394         struct se_node_acl *pr_reg_nacl;
395         struct se_dev_entry *pr_reg_deve;
396         struct se_lun *pr_reg_tg_pt_lun;
397         struct list_head pr_reg_list;
398         struct list_head pr_reg_abort_list;
399         struct list_head pr_reg_aptpl_list;
400         struct list_head pr_reg_atp_list;
401         struct list_head pr_reg_atp_mem_list;
402 };
403 
404 struct t10_reservation {
405         /* Reservation effects all target ports */
406         int pr_all_tg_pt;
407         /* Activate Persistence across Target Power Loss enabled
408          * for SCSI device */
409         int pr_aptpl_active;
410 #define PR_APTPL_BUF_LEN                        262144
411         u32 pr_generation;
412         spinlock_t registration_lock;
413         spinlock_t aptpl_reg_lock;
414         /*
415          * This will always be set by one individual I_T Nexus.
416          * However with all_tg_pt=1, other I_T Nexus from the
417          * same initiator can access PR reg/res info on a different
418          * target port.
419          *
420          * There is also the 'All Registrants' case, where there is
421          * a single *pr_res_holder of the reservation, but all
422          * registrations are considered reservation holders.
423          */
424         struct se_node_acl *pr_res_holder;
425         struct list_head registration_list;
426         struct list_head aptpl_reg_list;
427 };
428 
429 struct se_tmr_req {
430         /* Task Management function to be performed */
431         u8                      function;
432         /* Task Management response to send */
433         u8                      response;
434         int                     call_transport;
435         /* Reference to ITT that Task Mgmt should be performed */
436         u32                     ref_task_tag;
437         void                    *fabric_tmr_ptr;
438         struct se_cmd           *task_cmd;
439         struct se_device        *tmr_dev;
440         struct se_lun           *tmr_lun;
441         struct list_head        tmr_list;
442 };
443 
444 enum target_prot_op {
445         TARGET_PROT_NORMAL      = 0,
446         TARGET_PROT_DIN_INSERT  = (1 << 0),
447         TARGET_PROT_DOUT_INSERT = (1 << 1),
448         TARGET_PROT_DIN_STRIP   = (1 << 2),
449         TARGET_PROT_DOUT_STRIP  = (1 << 3),
450         TARGET_PROT_DIN_PASS    = (1 << 4),
451         TARGET_PROT_DOUT_PASS   = (1 << 5),
452 };
453 
454 #define TARGET_PROT_ALL TARGET_PROT_DIN_INSERT | TARGET_PROT_DOUT_INSERT | \
455                         TARGET_PROT_DIN_STRIP | TARGET_PROT_DOUT_STRIP | \
456                         TARGET_PROT_DIN_PASS | TARGET_PROT_DOUT_PASS
457 
458 enum target_prot_type {
459         TARGET_DIF_TYPE0_PROT,
460         TARGET_DIF_TYPE1_PROT,
461         TARGET_DIF_TYPE2_PROT,
462         TARGET_DIF_TYPE3_PROT,
463 };
464 
465 enum target_core_dif_check {
466         TARGET_DIF_CHECK_GUARD  = 0x1 << 0,
467         TARGET_DIF_CHECK_APPTAG = 0x1 << 1,
468         TARGET_DIF_CHECK_REFTAG = 0x1 << 2,
469 };
470 
471 struct se_dif_v1_tuple {
472         __be16                  guard_tag;
473         __be16                  app_tag;
474         __be32                  ref_tag;
475 };
476 
477 /* for sam_task_attr */
478 #define TCM_SIMPLE_TAG  0x20
479 #define TCM_HEAD_TAG    0x21
480 #define TCM_ORDERED_TAG 0x22
481 #define TCM_ACA_TAG     0x24
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         u16                     scsi_sense_length;
489         /* Delay for ALUA Active/NonOptimized state access in milliseconds */
490         int                     alua_nonop_delay;
491         /* See include/linux/dma-mapping.h */
492         enum dma_data_direction data_direction;
493         /* For SAM Task Attribute */
494         int                     sam_task_attr;
495         /* Used for se_sess->sess_tag_pool */
496         unsigned int            map_tag;
497         /* Transport protocol dependent state, see transport_state_table */
498         enum transport_state_table t_state;
499         unsigned                cmd_wait_set:1;
500         unsigned                unknown_data_length:1;
501         /* See se_cmd_flags_table */
502         u32                     se_cmd_flags;
503         u32                     se_ordered_id;
504         /* Total size in bytes associated with command */
505         u32                     data_length;
506         u32                     residual_count;
507         u32                     orig_fe_lun;
508         /* Persistent Reservation key */
509         u64                     pr_res_key;
510         /* Used for sense data */
511         void                    *sense_buffer;
512         struct list_head        se_delayed_node;
513         struct list_head        se_qf_node;
514         struct se_device      *se_dev;
515         struct se_dev_entry   *se_deve;
516         struct se_lun           *se_lun;
517         /* Only used for internal passthrough and legacy TCM fabric modules */
518         struct se_session       *se_sess;
519         struct se_tmr_req       *se_tmr_req;
520         struct list_head        se_cmd_list;
521         struct completion       cmd_wait_comp;
522         struct kref             cmd_kref;
523         struct target_core_fabric_ops *se_tfo;
524         sense_reason_t          (*execute_cmd)(struct se_cmd *);
525         sense_reason_t          (*execute_rw)(struct se_cmd *, struct scatterlist *,
526                                               u32, enum dma_data_direction);
527         sense_reason_t (*transport_complete_callback)(struct se_cmd *, bool);
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         unsigned int            t_task_nolb;
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_SENT              (1 << 4)
538 #define CMD_T_STOP              (1 << 5)
539 #define CMD_T_DEV_ACTIVE        (1 << 7)
540 #define CMD_T_REQUEST_STOP      (1 << 8)
541 #define CMD_T_BUSY              (1 << 9)
542         spinlock_t              t_state_lock;
543         struct completion       t_transport_stop_comp;
544 
545         struct work_struct      work;
546 
547         struct scatterlist      *t_data_sg;
548         struct scatterlist      *t_data_sg_orig;
549         unsigned int            t_data_nents;
550         unsigned int            t_data_nents_orig;
551         void                    *t_data_vmap;
552         struct scatterlist      *t_bidi_data_sg;
553         unsigned int            t_bidi_data_nents;
554 
555         struct list_head        state_list;
556         bool                    state_active;
557 
558         /* old task stop completion, consider merging with some of the above */
559         struct completion       task_stop_comp;
560 
561         /* backend private data */
562         void                    *priv;
563 
564         /* Used for lun->lun_ref counting */
565         int                     lun_ref_active;
566 
567         /* DIF related members */
568         enum target_prot_op     prot_op;
569         enum target_prot_type   prot_type;
570         u8                      prot_checks;
571         u32                     prot_length;
572         u32                     reftag_seed;
573         struct scatterlist      *t_prot_sg;
574         unsigned int            t_prot_nents;
575         sense_reason_t          pi_err;
576         sector_t                bad_sector;
577         bool                    prot_pto;
578 };
579 
580 struct se_ua {
581         u8                      ua_asc;
582         u8                      ua_ascq;
583         struct se_node_acl      *ua_nacl;
584         struct list_head        ua_nacl_list;
585 };
586 
587 struct se_node_acl {
588         char                    initiatorname[TRANSPORT_IQN_LEN];
589         /* Used to signal demo mode created ACL, disabled by default */
590         bool                    dynamic_node_acl;
591         bool                    acl_stop:1;
592         u32                     queue_depth;
593         u32                     acl_index;
594 #define MAX_ACL_TAG_SIZE 64
595         char                    acl_tag[MAX_ACL_TAG_SIZE];
596         /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
597         atomic_t                acl_pr_ref_count;
598         struct se_dev_entry     **device_list;
599         struct se_session       *nacl_sess;
600         struct se_portal_group *se_tpg;
601         spinlock_t              device_list_lock;
602         spinlock_t              nacl_sess_lock;
603         struct config_group     acl_group;
604         struct config_group     acl_attrib_group;
605         struct config_group     acl_auth_group;
606         struct config_group     acl_param_group;
607         struct config_group     acl_fabric_stat_group;
608         struct config_group     *acl_default_groups[5];
609         struct list_head        acl_list;
610         struct list_head        acl_sess_list;
611         struct completion       acl_free_comp;
612         struct kref             acl_kref;
613 };
614 
615 struct se_session {
616         unsigned                sess_tearing_down:1;
617         u64                     sess_bin_isid;
618         enum target_prot_op     sup_prot_ops;
619         struct se_node_acl      *se_node_acl;
620         struct se_portal_group *se_tpg;
621         void                    *fabric_sess_ptr;
622         struct list_head        sess_list;
623         struct list_head        sess_acl_list;
624         struct list_head        sess_cmd_list;
625         struct list_head        sess_wait_list;
626         spinlock_t              sess_cmd_lock;
627         struct kref             sess_kref;
628         void                    *sess_cmd_map;
629         struct percpu_ida       sess_tag_pool;
630 };
631 
632 struct se_device;
633 struct se_transform_info;
634 struct scatterlist;
635 
636 struct se_ml_stat_grps {
637         struct config_group     stat_group;
638         struct config_group     scsi_auth_intr_group;
639         struct config_group     scsi_att_intr_port_group;
640 };
641 
642 struct se_lun_acl {
643         char                    initiatorname[TRANSPORT_IQN_LEN];
644         u32                     mapped_lun;
645         struct se_node_acl      *se_lun_nacl;
646         struct se_lun           *se_lun;
647         struct list_head        lacl_list;
648         struct config_group     se_lun_group;
649         struct se_ml_stat_grps  ml_stat_grps;
650 };
651 
652 struct se_dev_entry {
653         bool                    def_pr_registered;
654         /* See transport_lunflags_table */
655         u32                     lun_flags;
656         u32                     mapped_lun;
657         u32                     total_cmds;
658         u64                     pr_res_key;
659         u64                     creation_time;
660         u32                     attach_count;
661         u64                     read_bytes;
662         u64                     write_bytes;
663         atomic_t                ua_count;
664         /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
665         atomic_t                pr_ref_count;
666         struct se_lun_acl       *se_lun_acl;
667         spinlock_t              ua_lock;
668         struct se_lun           *se_lun;
669         struct list_head        alua_port_list;
670         struct list_head        ua_list;
671 };
672 
673 struct se_dev_attrib {
674         int             emulate_model_alias;
675         int             emulate_dpo;
676         int             emulate_fua_write;
677         int             emulate_fua_read;
678         int             emulate_write_cache;
679         int             emulate_ua_intlck_ctrl;
680         int             emulate_tas;
681         int             emulate_tpu;
682         int             emulate_tpws;
683         int             emulate_caw;
684         int             emulate_3pc;
685         int             pi_prot_format;
686         enum target_prot_type pi_prot_type;
687         enum target_prot_type hw_pi_prot_type;
688         int             enforce_pr_isids;
689         int             force_pr_aptpl;
690         int             is_nonrot;
691         int             emulate_rest_reord;
692         u32             hw_block_size;
693         u32             block_size;
694         u32             hw_max_sectors;
695         u32             optimal_sectors;
696         u32             hw_queue_depth;
697         u32             queue_depth;
698         u32             max_unmap_lba_count;
699         u32             max_unmap_block_desc_count;
700         u32             unmap_granularity;
701         u32             unmap_granularity_alignment;
702         u32             max_write_same_len;
703         u32             max_bytes_per_io;
704         struct se_device *da_dev;
705         struct config_group da_group;
706 };
707 
708 struct se_port_stat_grps {
709         struct config_group stat_group;
710         struct config_group scsi_port_group;
711         struct config_group scsi_tgt_port_group;
712         struct config_group scsi_transport_group;
713 };
714 
715 struct se_lun {
716 #define SE_LUN_LINK_MAGIC                       0xffff7771
717         u32                     lun_link_magic;
718         /* See transport_lun_status_table */
719         enum transport_lun_status_table lun_status;
720         u32                     lun_access;
721         u32                     lun_flags;
722         u32                     unpacked_lun;
723         atomic_t                lun_acl_count;
724         spinlock_t              lun_acl_lock;
725         spinlock_t              lun_sep_lock;
726         struct completion       lun_shutdown_comp;
727         struct list_head        lun_acl_list;
728         struct se_device        *lun_se_dev;
729         struct se_port          *lun_sep;
730         struct config_group     lun_group;
731         struct se_port_stat_grps port_stat_grps;
732         struct completion       lun_ref_comp;
733         struct percpu_ref       lun_ref;
734 };
735 
736 struct se_dev_stat_grps {
737         struct config_group stat_group;
738         struct config_group scsi_dev_group;
739         struct config_group scsi_tgt_dev_group;
740         struct config_group scsi_lu_group;
741 };
742 
743 struct se_device {
744 #define SE_DEV_LINK_MAGIC                       0xfeeddeef
745         u32                     dev_link_magic;
746         /* RELATIVE TARGET PORT IDENTIFER Counter */
747         u16                     dev_rpti_counter;
748         /* Used for SAM Task Attribute ordering */
749         u32                     dev_cur_ordered_id;
750         u32                     dev_flags;
751 #define DF_CONFIGURED                           0x00000001
752 #define DF_FIRMWARE_VPD_UNIT_SERIAL             0x00000002
753 #define DF_EMULATED_VPD_UNIT_SERIAL             0x00000004
754 #define DF_USING_UDEV_PATH                      0x00000008
755 #define DF_USING_ALIAS                          0x00000010
756         u32                     dev_port_count;
757         /* Physical device queue depth */
758         u32                     queue_depth;
759         /* Used for SPC-2 reservations enforce of ISIDs */
760         u64                     dev_res_bin_isid;
761         /* Pointer to transport specific device structure */
762         u32                     dev_index;
763         u64                     creation_time;
764         atomic_long_t           num_resets;
765         atomic_long_t           num_cmds;
766         atomic_long_t           read_bytes;
767         atomic_long_t           write_bytes;
768         /* Active commands on this virtual SE device */
769         atomic_t                simple_cmds;
770         atomic_t                dev_ordered_id;
771         atomic_t                dev_ordered_sync;
772         atomic_t                dev_qf_count;
773         int                     export_count;
774         spinlock_t              delayed_cmd_lock;
775         spinlock_t              execute_task_lock;
776         spinlock_t              dev_reservation_lock;
777         unsigned int            dev_reservation_flags;
778 #define DRF_SPC2_RESERVATIONS                   0x00000001
779 #define DRF_SPC2_RESERVATIONS_WITH_ISID         0x00000002
780         spinlock_t              se_port_lock;
781         spinlock_t              se_tmr_lock;
782         spinlock_t              qf_cmd_lock;
783         struct semaphore        caw_sem;
784         /* Used for legacy SPC-2 reservationsa */
785         struct se_node_acl      *dev_reserved_node_acl;
786         /* Used for ALUA Logical Unit Group membership */
787         struct t10_alua_lu_gp_member *dev_alua_lu_gp_mem;
788         /* Used for SPC-3 Persistent Reservations */
789         struct t10_pr_registration *dev_pr_res_holder;
790         struct list_head        dev_sep_list;
791         struct list_head        dev_tmr_list;
792         struct workqueue_struct *tmr_wq;
793         struct work_struct      qf_work_queue;
794         struct list_head        delayed_cmd_list;
795         struct list_head        state_list;
796         struct list_head        qf_cmd_list;
797         struct list_head        g_dev_node;
798         /* Pointer to associated SE HBA */
799         struct se_hba           *se_hba;
800         /* T10 Inquiry and VPD WWN Information */
801         struct t10_wwn          t10_wwn;
802         /* T10 Asymmetric Logical Unit Assignment for Target Ports */
803         struct t10_alua         t10_alua;
804         /* T10 SPC-2 + SPC-3 Reservations */
805         struct t10_reservation  t10_pr;
806         struct se_dev_attrib    dev_attrib;
807         struct config_group     dev_group;
808         struct config_group     dev_pr_group;
809         struct se_dev_stat_grps dev_stat_grps;
810 #define SE_DEV_ALIAS_LEN 512            /* must be less than PAGE_SIZE */
811         unsigned char           dev_alias[SE_DEV_ALIAS_LEN];
812 #define SE_UDEV_PATH_LEN 512            /* must be less than PAGE_SIZE */
813         unsigned char           udev_path[SE_UDEV_PATH_LEN];
814         /* Pointer to template of function pointers for transport */
815         struct se_subsystem_api *transport;
816         /* Linked list for struct se_hba struct se_device list */
817         struct list_head        dev_list;
818         struct se_lun           xcopy_lun;
819         /* Protection Information */
820         int                     prot_length;
821 };
822 
823 struct se_hba {
824         u16                     hba_tpgt;
825         u32                     hba_id;
826         /* See hba_flags_table */
827         u32                     hba_flags;
828         /* Virtual iSCSI devices attached. */
829         u32                     dev_count;
830         u32                     hba_index;
831         /* Pointer to transport specific host structure. */
832         void                    *hba_ptr;
833         struct list_head        hba_node;
834         spinlock_t              device_lock;
835         struct config_group     hba_group;
836         struct mutex            hba_access_mutex;
837         struct se_subsystem_api *transport;
838 };
839 
840 struct scsi_port_stats {
841        u64     cmd_pdus;
842        u64     tx_data_octets;
843        u64     rx_data_octets;
844 };
845 
846 struct se_port {
847         /* RELATIVE TARGET PORT IDENTIFER */
848         u16             sep_rtpi;
849         int             sep_tg_pt_secondary_stat;
850         int             sep_tg_pt_secondary_write_md;
851         u32             sep_index;
852         struct scsi_port_stats sep_stats;
853         /* Used for ALUA Target Port Groups membership */
854         atomic_t        sep_tg_pt_secondary_offline;
855         /* Used for PR ALL_TG_PT=1 */
856         atomic_t        sep_tg_pt_ref_cnt;
857         spinlock_t      sep_alua_lock;
858         struct mutex    sep_tg_pt_md_mutex;
859         struct t10_alua_tg_pt_gp_member *sep_alua_tg_pt_gp_mem;
860         struct se_lun *sep_lun;
861         struct se_portal_group *sep_tpg;
862         struct list_head sep_alua_list;
863         struct list_head sep_list;
864 };
865 
866 struct se_tpg_np {
867         struct se_portal_group *tpg_np_parent;
868         struct config_group     tpg_np_group;
869 };
870 
871 struct se_portal_group {
872         /* Type of target portal group, see transport_tpg_type_table */
873         enum transport_tpg_type_table se_tpg_type;
874         /* Number of ACLed Initiator Nodes for this TPG */
875         u32                     num_node_acls;
876         /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
877         atomic_t                tpg_pr_ref_count;
878         /* Spinlock for adding/removing ACLed Nodes */
879         spinlock_t              acl_node_lock;
880         /* Spinlock for adding/removing sessions */
881         spinlock_t              session_lock;
882         spinlock_t              tpg_lun_lock;
883         /* Pointer to $FABRIC_MOD portal group */
884         void                    *se_tpg_fabric_ptr;
885         struct list_head        se_tpg_node;
886         /* linked list for initiator ACL list */
887         struct list_head        acl_node_list;
888         struct se_lun           **tpg_lun_list;
889         struct se_lun           tpg_virt_lun0;
890         /* List of TCM sessions associated wth this TPG */
891         struct list_head        tpg_sess_list;
892         /* Pointer to $FABRIC_MOD dependent code */
893         struct target_core_fabric_ops *se_tpg_tfo;
894         struct se_wwn           *se_tpg_wwn;
895         struct config_group     tpg_group;
896         struct config_group     *tpg_default_groups[7];
897         struct config_group     tpg_lun_group;
898         struct config_group     tpg_np_group;
899         struct config_group     tpg_acl_group;
900         struct config_group     tpg_attrib_group;
901         struct config_group     tpg_auth_group;
902         struct config_group     tpg_param_group;
903 };
904 
905 struct se_wwn {
906         struct target_fabric_configfs *wwn_tf;
907         struct config_group     wwn_group;
908         struct config_group     *wwn_default_groups[2];
909         struct config_group     fabric_stat_group;
910 };
911 
912 static inline void atomic_inc_mb(atomic_t *v)
913 {
914         smp_mb__before_atomic();
915         atomic_inc(v);
916         smp_mb__after_atomic();
917 }
918 
919 static inline void atomic_dec_mb(atomic_t *v)
920 {
921         smp_mb__before_atomic();
922         atomic_dec(v);
923         smp_mb__after_atomic();
924 }
925 
926 #endif /* TARGET_CORE_BASE_H */
927 

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