1/* SPDX-License-Identifier: GPL-2.0 */
  2#ifndef TARGET_CORE_BASE_H
  3#define TARGET_CORE_BASE_H
  4
  5#include <linux/configfs.h>      /* struct config_group */
  6#include <linux/dma-direction.h> /* enum dma_data_direction */
  7#include <linux/sbitmap.h>
  8#include <linux/percpu-refcount.h>
  9#include <linux/semaphore.h>     /* struct semaphore */
 10#include <linux/completion.h>
 11
 12#define TARGET_CORE_VERSION		"v5.0"
 13
 14/*
 15 * Maximum size of a CDB that can be stored in se_cmd without allocating
 16 * memory dynamically for the CDB.
 17 */
 18#define TCM_MAX_COMMAND_SIZE			32
 19/*
 20 * From include/scsi/scsi_cmnd.h:SCSI_SENSE_BUFFERSIZE, currently
 21 * defined 96, but the real limit is 252 (or 260 including the header)
 22 */
 23#define TRANSPORT_SENSE_BUFFER			96
 24/* Used by transport_send_check_condition_and_sense() */
 25#define SPC_SENSE_KEY_OFFSET			2
 26#define SPC_ADD_SENSE_LEN_OFFSET		7
 27#define SPC_DESC_TYPE_OFFSET			8
 28#define SPC_ADDITIONAL_DESC_LEN_OFFSET		9
 29#define SPC_VALIDITY_OFFSET			10
 30#define SPC_ASC_KEY_OFFSET			12
 31#define SPC_ASCQ_KEY_OFFSET			13
 32#define TRANSPORT_IQN_LEN			224
 33/* Used by target_core_store_alua_lu_gp() and target_core_alua_lu_gp_show_attr_members() */
 34#define LU_GROUP_NAME_BUF			256
 35/* Used by core_alua_store_tg_pt_gp_info() and target_core_alua_tg_pt_gp_show_attr_members() */
 36#define TG_PT_GROUP_NAME_BUF			256
 37/* Used to parse VPD into struct t10_vpd */
 38#define VPD_TMP_BUF_SIZE			254
 39/* Used by transport_generic_cmd_sequencer() */
 40#define READ_BLOCK_LEN          		6
 41#define READ_CAP_LEN            		8
 42#define READ_POSITION_LEN       		20
 43#define INQUIRY_LEN				36
 44/* Used by transport_get_inquiry_vpd_serial() */
 45#define INQUIRY_VPD_SERIAL_LEN			254
 46/* Used by transport_get_inquiry_vpd_device_ident() */
 47#define INQUIRY_VPD_DEVICE_IDENTIFIER_LEN	254
 48
 49#define INQUIRY_VENDOR_LEN			8
 50#define INQUIRY_MODEL_LEN			16
 51#define INQUIRY_REVISION_LEN			4
 52
 53/* Attempts before moving from SHORT to LONG */
 54#define PYX_TRANSPORT_WINDOW_CLOSED_THRESHOLD	3
 55#define PYX_TRANSPORT_WINDOW_CLOSED_WAIT_SHORT	3  /* In milliseconds */
 56#define PYX_TRANSPORT_WINDOW_CLOSED_WAIT_LONG	10 /* In milliseconds */
 57
 58#define PYX_TRANSPORT_STATUS_INTERVAL		5 /* In seconds */
 59
 60/* struct se_dev_attrib sanity values */
 61/* Default max_unmap_lba_count */
 62#define DA_MAX_UNMAP_LBA_COUNT			0
 63/* Default max_unmap_block_desc_count */
 64#define DA_MAX_UNMAP_BLOCK_DESC_COUNT		0
 65/* Default unmap_granularity */
 66#define DA_UNMAP_GRANULARITY_DEFAULT		0
 67/* Default unmap_granularity_alignment */
 68#define DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT	0
 69/* Default unmap_zeroes_data */
 70#define DA_UNMAP_ZEROES_DATA_DEFAULT		0
 71/* Default max_write_same_len, disabled by default */
 72#define DA_MAX_WRITE_SAME_LEN			0
 73/* Use a model alias based on the configfs backend device name */
 74#define DA_EMULATE_MODEL_ALIAS			0
 75/* Emulation for WriteCache and SYNCHRONIZE_CACHE */
 76#define DA_EMULATE_WRITE_CACHE			0
 
 
 77/* Emulation for TASK_ABORTED status (TAS) by default */
 78#define DA_EMULATE_TAS				1
 79/* Emulation for Thin Provisioning UNMAP using block/blk-lib.c:blkdev_issue_discard() */
 80#define DA_EMULATE_TPU				0
 81/*
 82 * Emulation for Thin Provisioning WRITE_SAME w/ UNMAP=1 bit using
 83 * block/blk-lib.c:blkdev_issue_discard()
 84 */
 85#define DA_EMULATE_TPWS				0
 86/* Emulation for CompareAndWrite (AtomicTestandSet) by default */
 87#define DA_EMULATE_CAW				1
 88/* Emulation for 3rd Party Copy (ExtendedCopy) by default */
 89#define DA_EMULATE_3PC				1
 90/* No Emulation for PSCSI by default */
 91#define DA_EMULATE_ALUA				0
 92/* Emulate SCSI2 RESERVE/RELEASE and Persistent Reservations by default */
 93#define DA_EMULATE_PR				1
 94/* Enforce SCSI Initiator Port TransportID with 'ISID' for PR */
 95#define DA_ENFORCE_PR_ISIDS			1
 96/* Force SPC-3 PR Activate Persistence across Target Power Loss */
 97#define DA_FORCE_PR_APTPL			0
 98#define DA_STATUS_MAX_SECTORS_MIN		16
 99#define DA_STATUS_MAX_SECTORS_MAX		8192
100/* By default don't report non-rotating (solid state) medium */
101#define DA_IS_NONROT				0
102/* Queue Algorithm Modifier default for restricted reordering in control mode page */
103#define DA_EMULATE_REST_REORD			0
104
105#define SE_INQUIRY_BUF				1024
106#define SE_MODE_PAGE_BUF			512
107#define SE_SENSE_BUF				96
108
109/* struct se_hba->hba_flags */
110enum hba_flags_table {
111	HBA_FLAGS_INTERNAL_USE	= 0x01,
112	HBA_FLAGS_PSCSI_MODE	= 0x02,
113};
114
115/* Special transport agnostic struct se_cmd->t_states */
116enum transport_state_table {
117	TRANSPORT_NO_STATE	= 0,
118	TRANSPORT_NEW_CMD	= 1,
119	TRANSPORT_WRITE_PENDING	= 3,
120	TRANSPORT_PROCESSING	= 5,
121	TRANSPORT_COMPLETE	= 6,
122	TRANSPORT_ISTATE_PROCESSING = 11,
123	TRANSPORT_COMPLETE_QF_WP = 18,
124	TRANSPORT_COMPLETE_QF_OK = 19,
125	TRANSPORT_COMPLETE_QF_ERR = 20,
126};
127
128/* Used for struct se_cmd->se_cmd_flags */
129enum se_cmd_flags_table {
130	SCF_SUPPORTED_SAM_OPCODE	= 0x00000001,
131	SCF_TRANSPORT_TASK_SENSE	= 0x00000002,
132	SCF_EMULATED_TASK_SENSE		= 0x00000004,
133	SCF_SCSI_DATA_CDB		= 0x00000008,
134	SCF_SCSI_TMR_CDB		= 0x00000010,
135	SCF_FUA				= 0x00000080,
136	SCF_SE_LUN_CMD			= 0x00000100,
137	SCF_BIDI			= 0x00000400,
138	SCF_SENT_CHECK_CONDITION	= 0x00000800,
139	SCF_OVERFLOW_BIT		= 0x00001000,
140	SCF_UNDERFLOW_BIT		= 0x00002000,
 
141	SCF_ALUA_NON_OPTIMIZED		= 0x00008000,
142	SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC = 0x00020000,
143	SCF_COMPARE_AND_WRITE		= 0x00080000,
 
144	SCF_PASSTHROUGH_PROT_SG_TO_MEM_NOALLOC = 0x00200000,
145	SCF_ACK_KREF			= 0x00400000,
146	SCF_USE_CPUID			= 0x00800000,
147	SCF_TASK_ATTR_SET		= 0x01000000,
148	SCF_TREAT_READ_AS_NORMAL	= 0x02000000,
149};
150
151/*
152 * Used by transport_send_check_condition_and_sense()
153 * to signal which ASC/ASCQ sense payload should be built.
154 */
155typedef unsigned __bitwise sense_reason_t;
156
157enum tcm_sense_reason_table {
158#define R(x)	(__force sense_reason_t )(x)
159	TCM_NO_SENSE				= R(0x00),
160	TCM_NON_EXISTENT_LUN			= R(0x01),
161	TCM_UNSUPPORTED_SCSI_OPCODE		= R(0x02),
162	TCM_INCORRECT_AMOUNT_OF_DATA		= R(0x03),
163	TCM_UNEXPECTED_UNSOLICITED_DATA		= R(0x04),
164	TCM_SERVICE_CRC_ERROR			= R(0x05),
165	TCM_SNACK_REJECTED			= R(0x06),
166	TCM_SECTOR_COUNT_TOO_MANY		= R(0x07),
167	TCM_INVALID_CDB_FIELD			= R(0x08),
168	TCM_INVALID_PARAMETER_LIST		= R(0x09),
169	TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE	= R(0x0a),
170	TCM_UNKNOWN_MODE_PAGE			= R(0x0b),
171	TCM_WRITE_PROTECTED			= R(0x0c),
172	TCM_CHECK_CONDITION_ABORT_CMD		= R(0x0d),
173	TCM_CHECK_CONDITION_UNIT_ATTENTION	= R(0x0e),
174	TCM_CHECK_CONDITION_NOT_READY		= R(0x0f),
175	TCM_RESERVATION_CONFLICT		= R(0x10),
176	TCM_ADDRESS_OUT_OF_RANGE		= R(0x11),
177	TCM_OUT_OF_RESOURCES			= R(0x12),
178	TCM_PARAMETER_LIST_LENGTH_ERROR		= R(0x13),
179	TCM_MISCOMPARE_VERIFY			= R(0x14),
180	TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED	= R(0x15),
181	TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED	= R(0x16),
182	TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED	= R(0x17),
183	TCM_COPY_TARGET_DEVICE_NOT_REACHABLE	= R(0x18),
184	TCM_TOO_MANY_TARGET_DESCS		= R(0x19),
185	TCM_UNSUPPORTED_TARGET_DESC_TYPE_CODE	= R(0x1a),
186	TCM_TOO_MANY_SEGMENT_DESCS		= R(0x1b),
187	TCM_UNSUPPORTED_SEGMENT_DESC_TYPE_CODE	= R(0x1c),
188	TCM_INSUFFICIENT_REGISTRATION_RESOURCES	= R(0x1d),
189	TCM_LUN_BUSY				= R(0x1e),
190#undef R
191};
192
193enum target_sc_flags_table {
194	TARGET_SCF_BIDI_OP		= 0x01,
195	TARGET_SCF_ACK_KREF		= 0x02,
196	TARGET_SCF_UNKNOWN_SIZE		= 0x04,
197	TARGET_SCF_USE_CPUID		= 0x08,
198	TARGET_SCF_LOOKUP_LUN_FROM_TAG	= 0x10,
199};
200
201/* fabric independent task management function values */
202enum tcm_tmreq_table {
203	TMR_ABORT_TASK		= 1,
204	TMR_ABORT_TASK_SET	= 2,
205	TMR_CLEAR_ACA		= 3,
206	TMR_CLEAR_TASK_SET	= 4,
207	TMR_LUN_RESET		= 5,
208	TMR_TARGET_WARM_RESET	= 6,
209	TMR_TARGET_COLD_RESET	= 7,
210	TMR_LUN_RESET_PRO	= 0x80,
211	TMR_UNKNOWN		= 0xff,
212};
213
214/* fabric independent task management response values */
215enum tcm_tmrsp_table {
216	TMR_FUNCTION_FAILED		= 0,
217	TMR_FUNCTION_COMPLETE		= 1,
218	TMR_TASK_DOES_NOT_EXIST		= 2,
219	TMR_LUN_DOES_NOT_EXIST		= 3,
220	TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED	= 4,
221	TMR_FUNCTION_REJECTED		= 5,
222};
223
224/*
225 * Used for target SCSI statistics
226 */
227typedef enum {
228	SCSI_INST_INDEX,
 
229	SCSI_AUTH_INTR_INDEX,
230	SCSI_INDEX_TYPE_MAX
231} scsi_index_t;
232
233struct se_cmd;
234
235struct t10_alua_lba_map_member {
236	struct list_head lba_map_mem_list;
237	int lba_map_mem_alua_state;
238	int lba_map_mem_alua_pg_id;
239};
240
241struct t10_alua_lba_map {
242	u64 lba_map_first_lba;
243	u64 lba_map_last_lba;
244	struct list_head lba_map_list;
245	struct list_head lba_map_mem_list;
246};
247
248struct t10_alua {
249	/* ALUA Target Port Group ID */
250	u16	alua_tg_pt_gps_counter;
251	u32	alua_tg_pt_gps_count;
252	/* Referrals support */
253	spinlock_t lba_map_lock;
254	u32     lba_map_segment_size;
255	u32     lba_map_segment_multiplier;
256	struct list_head lba_map_list;
257	spinlock_t tg_pt_gps_lock;
258	struct se_device *t10_dev;
259	/* Used for default ALUA Target Port Group */
260	struct t10_alua_tg_pt_gp *default_tg_pt_gp;
261	/* Used for default ALUA Target Port Group ConfigFS group */
262	struct config_group alua_tg_pt_gps_group;
263	struct list_head tg_pt_gps_list;
264};
265
266struct t10_alua_lu_gp {
267	u16	lu_gp_id;
268	int	lu_gp_valid_id;
269	u32	lu_gp_members;
270	atomic_t lu_gp_ref_cnt;
271	spinlock_t lu_gp_lock;
272	struct config_group lu_gp_group;
273	struct list_head lu_gp_node;
274	struct list_head lu_gp_mem_list;
275};
276
277struct t10_alua_lu_gp_member {
278	bool lu_gp_assoc;
279	atomic_t lu_gp_mem_ref_cnt;
280	spinlock_t lu_gp_mem_lock;
281	struct t10_alua_lu_gp *lu_gp;
282	struct se_device *lu_gp_mem_dev;
283	struct list_head lu_gp_mem_list;
284};
285
286struct t10_alua_tg_pt_gp {
287	u16	tg_pt_gp_id;
288	int	tg_pt_gp_valid_id;
289	int	tg_pt_gp_alua_supported_states;
 
 
290	int	tg_pt_gp_alua_access_status;
291	int	tg_pt_gp_alua_access_type;
292	int	tg_pt_gp_nonop_delay_msecs;
293	int	tg_pt_gp_trans_delay_msecs;
294	int	tg_pt_gp_implicit_trans_secs;
295	int	tg_pt_gp_pref;
296	int	tg_pt_gp_write_metadata;
297	u32	tg_pt_gp_members;
298	int	tg_pt_gp_alua_access_state;
299	atomic_t tg_pt_gp_ref_cnt;
300	spinlock_t tg_pt_gp_lock;
301	struct mutex tg_pt_gp_transition_mutex;
302	struct se_device *tg_pt_gp_dev;
303	struct config_group tg_pt_gp_group;
304	struct list_head tg_pt_gp_list;
305	struct list_head tg_pt_gp_lun_list;
306	struct se_lun *tg_pt_gp_alua_lun;
307	struct se_node_acl *tg_pt_gp_alua_nacl;
 
 
308};
309
310struct t10_vpd {
311	unsigned char device_identifier[INQUIRY_VPD_DEVICE_IDENTIFIER_LEN];
312	int protocol_identifier_set;
313	u32 protocol_identifier;
314	u32 device_identifier_code_set;
315	u32 association;
316	u32 device_identifier_type;
317	struct list_head vpd_list;
318};
319
320struct t10_wwn {
321	/*
322	 * SCSI left aligned strings may not be null terminated. +1 to ensure a
323	 * null terminator is always present.
324	 */
325	char vendor[INQUIRY_VENDOR_LEN + 1];
326	char model[INQUIRY_MODEL_LEN + 1];
327	char revision[INQUIRY_REVISION_LEN + 1];
328	char unit_serial[INQUIRY_VPD_SERIAL_LEN];
329	spinlock_t t10_vpd_lock;
330	struct se_device *t10_dev;
331	struct config_group t10_wwn_group;
332	struct list_head t10_vpd_list;
333};
334
335struct t10_pr_registration {
336	/* Used for fabrics that contain WWN+ISID */
337#define PR_REG_ISID_LEN				16
338	/* PR_REG_ISID_LEN + ',i,0x' */
339#define PR_REG_ISID_ID_LEN			(PR_REG_ISID_LEN + 5)
340	char pr_reg_isid[PR_REG_ISID_LEN];
341	/* Used during APTPL metadata reading */
342#define PR_APTPL_MAX_IPORT_LEN			256
343	unsigned char pr_iport[PR_APTPL_MAX_IPORT_LEN];
344	/* Used during APTPL metadata reading */
345#define PR_APTPL_MAX_TPORT_LEN			256
346	unsigned char pr_tport[PR_APTPL_MAX_TPORT_LEN];
347	u16 pr_aptpl_rpti;
348	u16 pr_reg_tpgt;
349	/* Reservation effects all target ports */
350	int pr_reg_all_tg_pt;
351	/* Activate Persistence across Target Power Loss */
352	int pr_reg_aptpl;
353	int pr_res_holder;
354	int pr_res_type;
355	int pr_res_scope;
356	/* Used for fabric initiator WWPNs using a ISID */
357	bool isid_present_at_reg;
358	u64 pr_res_mapped_lun;
359	u64 pr_aptpl_target_lun;
360	u16 tg_pt_sep_rtpi;
361	u32 pr_res_generation;
362	u64 pr_reg_bin_isid;
363	u64 pr_res_key;
364	atomic_t pr_res_holders;
365	struct se_node_acl *pr_reg_nacl;
366	/* Used by ALL_TG_PT=1 registration with deve->pr_ref taken */
367	struct se_dev_entry *pr_reg_deve;
368	struct list_head pr_reg_list;
369	struct list_head pr_reg_abort_list;
370	struct list_head pr_reg_aptpl_list;
371	struct list_head pr_reg_atp_list;
372	struct list_head pr_reg_atp_mem_list;
373};
374
375struct t10_reservation {
376	/* Reservation effects all target ports */
377	int pr_all_tg_pt;
378	/* Activate Persistence across Target Power Loss enabled
379	 * for SCSI device */
380	int pr_aptpl_active;
381#define PR_APTPL_BUF_LEN			262144
382	u32 pr_generation;
383	spinlock_t registration_lock;
384	spinlock_t aptpl_reg_lock;
385	/*
386	 * This will always be set by one individual I_T Nexus.
387	 * However with all_tg_pt=1, other I_T Nexus from the
388	 * same initiator can access PR reg/res info on a different
389	 * target port.
390	 *
391	 * There is also the 'All Registrants' case, where there is
392	 * a single *pr_res_holder of the reservation, but all
393	 * registrations are considered reservation holders.
394	 */
395	struct se_node_acl *pr_res_holder;
396	struct list_head registration_list;
397	struct list_head aptpl_reg_list;
398};
399
400struct se_tmr_req {
401	/* Task Management function to be performed */
402	u8			function;
403	/* Task Management response to send */
404	u8			response;
405	int			call_transport;
406	/* Reference to ITT that Task Mgmt should be performed */
407	u64			ref_task_tag;
408	void 			*fabric_tmr_ptr;
409	struct se_cmd		*task_cmd;
410	struct se_device	*tmr_dev;
 
411	struct list_head	tmr_list;
412};
413
414enum target_prot_op {
415	TARGET_PROT_NORMAL	= 0,
416	TARGET_PROT_DIN_INSERT	= (1 << 0),
417	TARGET_PROT_DOUT_INSERT	= (1 << 1),
418	TARGET_PROT_DIN_STRIP	= (1 << 2),
419	TARGET_PROT_DOUT_STRIP	= (1 << 3),
420	TARGET_PROT_DIN_PASS	= (1 << 4),
421	TARGET_PROT_DOUT_PASS	= (1 << 5),
422};
423
424#define TARGET_PROT_ALL	TARGET_PROT_DIN_INSERT | TARGET_PROT_DOUT_INSERT | \
425			TARGET_PROT_DIN_STRIP | TARGET_PROT_DOUT_STRIP | \
426			TARGET_PROT_DIN_PASS | TARGET_PROT_DOUT_PASS
427
428enum target_prot_type {
429	TARGET_DIF_TYPE0_PROT,
430	TARGET_DIF_TYPE1_PROT,
431	TARGET_DIF_TYPE2_PROT,
432	TARGET_DIF_TYPE3_PROT,
433};
434
435/* Emulation for UNIT ATTENTION Interlock Control */
436enum target_ua_intlck_ctrl {
437	TARGET_UA_INTLCK_CTRL_CLEAR = 0,
438	TARGET_UA_INTLCK_CTRL_NO_CLEAR = 1,
439	TARGET_UA_INTLCK_CTRL_ESTABLISH_UA = 2,
440};
441
442enum target_core_dif_check {
443	TARGET_DIF_CHECK_GUARD  = 0x1 << 0,
444	TARGET_DIF_CHECK_APPTAG = 0x1 << 1,
445	TARGET_DIF_CHECK_REFTAG = 0x1 << 2,
446};
447
448/* for sam_task_attr */
449#define TCM_SIMPLE_TAG	0x20
450#define TCM_HEAD_TAG	0x21
451#define TCM_ORDERED_TAG	0x22
452#define TCM_ACA_TAG	0x24
453
454struct se_cmd {
455	/* SAM response code being sent to initiator */
456	u8			scsi_status;
457	u8			scsi_asc;
458	u8			scsi_ascq;
459	u16			scsi_sense_length;
 
460	unsigned		unknown_data_length:1;
461	bool			state_active:1;
462	u64			tag; /* SAM command identifier aka task tag */
463	/* Delay for ALUA Active/NonOptimized state access in milliseconds */
464	int			alua_nonop_delay;
465	/* See include/linux/dma-mapping.h */
466	enum dma_data_direction	data_direction;
467	/* For SAM Task Attribute */
468	int			sam_task_attr;
469	/* Used for se_sess->sess_tag_pool */
470	unsigned int		map_tag;
471	int			map_cpu;
472	/* Transport protocol dependent state, see transport_state_table */
473	enum transport_state_table t_state;
474	/* See se_cmd_flags_table */
475	u32			se_cmd_flags;
476	/* Total size in bytes associated with command */
477	u32			data_length;
478	u32			residual_count;
479	u64			orig_fe_lun;
480	/* Persistent Reservation key */
481	u64			pr_res_key;
482	/* Used for sense data */
483	void			*sense_buffer;
484	struct list_head	se_delayed_node;
485	struct list_head	se_qf_node;
486	struct se_device      *se_dev;
487	struct se_lun		*se_lun;
488	/* Only used for internal passthrough and legacy TCM fabric modules */
489	struct se_session	*se_sess;
490	struct se_tmr_req	*se_tmr_req;
491	struct list_head	se_cmd_list;
492	struct completion	*free_compl;
493	struct completion	*abrt_compl;
494	const struct target_core_fabric_ops *se_tfo;
495	sense_reason_t		(*execute_cmd)(struct se_cmd *);
496	sense_reason_t (*transport_complete_callback)(struct se_cmd *, bool, int *);
497	void			*protocol_data;
498
499	unsigned char		*t_task_cdb;
500	unsigned char		__t_task_cdb[TCM_MAX_COMMAND_SIZE];
501	unsigned long long	t_task_lba;
502	unsigned int		t_task_nolb;
503	unsigned int		transport_state;
504#define CMD_T_ABORTED		(1 << 0)
505#define CMD_T_ACTIVE		(1 << 1)
506#define CMD_T_COMPLETE		(1 << 2)
507#define CMD_T_SENT		(1 << 4)
508#define CMD_T_STOP		(1 << 5)
 
 
509#define CMD_T_TAS		(1 << 10)
510#define CMD_T_FABRIC_STOP	(1 << 11)
511	spinlock_t		t_state_lock;
512	struct kref		cmd_kref;
513	struct completion	t_transport_stop_comp;
514
515	struct work_struct	work;
516
517	struct scatterlist	*t_data_sg;
518	struct scatterlist	*t_data_sg_orig;
519	unsigned int		t_data_nents;
520	unsigned int		t_data_nents_orig;
521	void			*t_data_vmap;
522	struct scatterlist	*t_bidi_data_sg;
523	unsigned int		t_bidi_data_nents;
524
525	/* Used for lun->lun_ref counting */
526	int			lun_ref_active;
527
528	struct list_head	state_list;
529
530	/* backend private data */
531	void			*priv;
532
533	/* DIF related members */
534	enum target_prot_op	prot_op;
535	enum target_prot_type	prot_type;
536	u8			prot_checks;
537	bool			prot_pto;
538	u32			prot_length;
539	u32			reftag_seed;
540	struct scatterlist	*t_prot_sg;
541	unsigned int		t_prot_nents;
542	sense_reason_t		pi_err;
543	sector_t		bad_sector;
544	int			cpuid;
545};
546
547struct se_ua {
548	u8			ua_asc;
549	u8			ua_ascq;
550	struct list_head	ua_nacl_list;
551};
552
553struct se_node_acl {
554	char			initiatorname[TRANSPORT_IQN_LEN];
555	/* Used to signal demo mode created ACL, disabled by default */
556	bool			dynamic_node_acl;
557	bool			dynamic_stop;
558	u32			queue_depth;
559	u32			acl_index;
560	enum target_prot_type	saved_prot_type;
561#define MAX_ACL_TAG_SIZE 64
562	char			acl_tag[MAX_ACL_TAG_SIZE];
563	/* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
564	atomic_t		acl_pr_ref_count;
565	struct hlist_head	lun_entry_hlist;
566	struct se_session	*nacl_sess;
567	struct se_portal_group *se_tpg;
568	struct mutex		lun_entry_mutex;
569	spinlock_t		nacl_sess_lock;
570	struct config_group	acl_group;
571	struct config_group	acl_attrib_group;
572	struct config_group	acl_auth_group;
573	struct config_group	acl_param_group;
574	struct config_group	acl_fabric_stat_group;
575	struct list_head	acl_list;
576	struct list_head	acl_sess_list;
577	struct completion	acl_free_comp;
578	struct kref		acl_kref;
579};
580
581static inline struct se_node_acl *acl_to_nacl(struct config_item *item)
582{
583	return container_of(to_config_group(item), struct se_node_acl,
584			acl_group);
585}
586
587static inline struct se_node_acl *attrib_to_nacl(struct config_item *item)
588{
589	return container_of(to_config_group(item), struct se_node_acl,
590			acl_attrib_group);
591}
592
593static inline struct se_node_acl *auth_to_nacl(struct config_item *item)
594{
595	return container_of(to_config_group(item), struct se_node_acl,
596			acl_auth_group);
597}
598
599static inline struct se_node_acl *param_to_nacl(struct config_item *item)
600{
601	return container_of(to_config_group(item), struct se_node_acl,
602			acl_param_group);
603}
604
605static inline struct se_node_acl *fabric_stat_to_nacl(struct config_item *item)
606{
607	return container_of(to_config_group(item), struct se_node_acl,
608			acl_fabric_stat_group);
609}
610
611struct se_session {
612	unsigned		sess_tearing_down:1;
613	u64			sess_bin_isid;
614	enum target_prot_op	sup_prot_ops;
615	enum target_prot_type	sess_prot_type;
616	struct se_node_acl	*se_node_acl;
617	struct se_portal_group *se_tpg;
618	void			*fabric_sess_ptr;
619	struct percpu_ref	cmd_count;
620	struct list_head	sess_list;
621	struct list_head	sess_acl_list;
622	struct list_head	sess_cmd_list;
 
623	spinlock_t		sess_cmd_lock;
624	wait_queue_head_t	cmd_list_wq;
625	void			*sess_cmd_map;
626	struct sbitmap_queue	sess_tag_pool;
627};
628
629struct se_device;
630struct se_transform_info;
631struct scatterlist;
632
633struct se_ml_stat_grps {
634	struct config_group	stat_group;
635	struct config_group	scsi_auth_intr_group;
636	struct config_group	scsi_att_intr_port_group;
637};
638
639struct se_lun_acl {
640	u64			mapped_lun;
641	struct se_node_acl	*se_lun_nacl;
642	struct se_lun		*se_lun;
643	struct config_group	se_lun_group;
644	struct se_ml_stat_grps	ml_stat_grps;
645};
646
647struct se_dev_entry {
648	u64			mapped_lun;
649	u64			pr_res_key;
650	u64			creation_time;
651	bool			lun_access_ro;
652	u32			attach_count;
653	atomic_long_t		total_cmds;
654	atomic_long_t		read_bytes;
655	atomic_long_t		write_bytes;
 
656	/* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
657	struct kref		pr_kref;
658	struct completion	pr_comp;
659	struct se_lun_acl __rcu	*se_lun_acl;
660	spinlock_t		ua_lock;
661	struct se_lun __rcu	*se_lun;
662#define DEF_PR_REG_ACTIVE		1
663	unsigned long		deve_flags;
664	struct list_head	alua_port_list;
665	struct list_head	lun_link;
666	struct list_head	ua_list;
667	struct hlist_node	link;
668	struct rcu_head		rcu_head;
669};
670
671struct se_dev_attrib {
672	bool		emulate_model_alias;
673	bool		emulate_dpo;		/* deprecated */
674	bool		emulate_fua_write;
675	bool		emulate_fua_read;	/* deprecated */
676	bool		emulate_write_cache;
677	enum target_ua_intlck_ctrl emulate_ua_intlck_ctrl;
678	bool		emulate_tas;
679	bool		emulate_tpu;
680	bool		emulate_tpws;
681	bool		emulate_caw;
682	bool		emulate_3pc;
683	bool		emulate_pr;
684	enum target_prot_type pi_prot_type;
685	enum target_prot_type hw_pi_prot_type;
686	bool		pi_prot_verify;
687	bool		enforce_pr_isids;
688	bool		force_pr_aptpl;
689	bool		is_nonrot;
690	bool		emulate_rest_reord;
691	bool		unmap_zeroes_data;
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
708struct 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
715struct scsi_port_stats {
716	atomic_long_t	cmd_pdus;
717	atomic_long_t	tx_data_octets;
718	atomic_long_t	rx_data_octets;
719};
720
721struct se_lun {
722	u64			unpacked_lun;
723	bool			lun_shutdown;
 
724	bool			lun_access_ro;
725	u32			lun_index;
726
727	/* RELATIVE TARGET PORT IDENTIFER */
728	u16			lun_rtpi;
729	atomic_t		lun_acl_count;
730	struct se_device __rcu	*lun_se_dev;
731
732	struct list_head	lun_deve_list;
733	spinlock_t		lun_deve_lock;
734
735	/* ALUA state */
736	int			lun_tg_pt_secondary_stat;
737	int			lun_tg_pt_secondary_write_md;
738	atomic_t		lun_tg_pt_secondary_offline;
739	struct mutex		lun_tg_pt_md_mutex;
740
741	/* ALUA target port group linkage */
742	struct list_head	lun_tg_pt_gp_link;
743	struct t10_alua_tg_pt_gp *lun_tg_pt_gp;
744	spinlock_t		lun_tg_pt_gp_lock;
745
746	struct se_portal_group	*lun_tpg;
747	struct scsi_port_stats	lun_stats;
748	struct config_group	lun_group;
749	struct se_port_stat_grps port_stat_grps;
 
750	struct completion	lun_shutdown_comp;
751	struct percpu_ref	lun_ref;
752	struct list_head	lun_dev_link;
753	struct hlist_node	link;
754	struct rcu_head		rcu_head;
755};
756
757struct se_dev_stat_grps {
758	struct config_group stat_group;
759	struct config_group scsi_dev_group;
760	struct config_group scsi_tgt_dev_group;
761	struct config_group scsi_lu_group;
762};
763
764struct se_device {
 
 
765	/* RELATIVE TARGET PORT IDENTIFER Counter */
766	u16			dev_rpti_counter;
767	/* Used for SAM Task Attribute ordering */
768	u32			dev_cur_ordered_id;
769	u32			dev_flags;
770#define DF_CONFIGURED				0x00000001
771#define DF_FIRMWARE_VPD_UNIT_SERIAL		0x00000002
772#define DF_EMULATED_VPD_UNIT_SERIAL		0x00000004
773#define DF_USING_UDEV_PATH			0x00000008
774#define DF_USING_ALIAS				0x00000010
775#define DF_READ_ONLY				0x00000020
776	u8			transport_flags;
777	/* Physical device queue depth */
778	u32			queue_depth;
779	/* Used for SPC-2 reservations enforce of ISIDs */
780	u64			dev_res_bin_isid;
781	/* Pointer to transport specific device structure */
782	u32			dev_index;
783	u64			creation_time;
784	atomic_long_t		num_resets;
785	atomic_long_t		aborts_complete;
786	atomic_long_t		aborts_no_task;
787	atomic_long_t		num_cmds;
788	atomic_long_t		read_bytes;
789	atomic_long_t		write_bytes;
790	/* Active commands on this virtual SE device */
791	atomic_t		simple_cmds;
792	atomic_t		dev_ordered_sync;
793	atomic_t		dev_qf_count;
794	u32			export_count;
795	spinlock_t		delayed_cmd_lock;
796	spinlock_t		execute_task_lock;
797	spinlock_t		dev_reservation_lock;
798	unsigned int		dev_reservation_flags;
799#define DRF_SPC2_RESERVATIONS			0x00000001
800#define DRF_SPC2_RESERVATIONS_WITH_ISID		0x00000002
801	spinlock_t		se_port_lock;
802	spinlock_t		se_tmr_lock;
803	spinlock_t		qf_cmd_lock;
804	struct semaphore	caw_sem;
805	/* Used for legacy SPC-2 reservations */
806	struct se_session	*reservation_holder;
807	/* Used for ALUA Logical Unit Group membership */
808	struct t10_alua_lu_gp_member *dev_alua_lu_gp_mem;
809	/* Used for SPC-3 Persistent Reservations */
810	struct t10_pr_registration *dev_pr_res_holder;
811	struct list_head	dev_sep_list;
812	struct list_head	dev_tmr_list;
 
813	struct work_struct	qf_work_queue;
814	struct list_head	delayed_cmd_list;
815	struct list_head	state_list;
816	struct list_head	qf_cmd_list;
 
817	/* Pointer to associated SE HBA */
818	struct se_hba		*se_hba;
819	/* T10 Inquiry and VPD WWN Information */
820	struct t10_wwn		t10_wwn;
821	/* T10 Asymmetric Logical Unit Assignment for Target Ports */
822	struct t10_alua		t10_alua;
823	/* T10 SPC-2 + SPC-3 Reservations */
824	struct t10_reservation	t10_pr;
825	struct se_dev_attrib	dev_attrib;
826	struct config_group	dev_action_group;
827	struct config_group	dev_group;
828	struct config_group	dev_pr_group;
829	struct se_dev_stat_grps dev_stat_grps;
830#define SE_DEV_ALIAS_LEN 512		/* must be less than PAGE_SIZE */
831	unsigned char		dev_alias[SE_DEV_ALIAS_LEN];
832#define SE_UDEV_PATH_LEN 512		/* must be less than PAGE_SIZE */
833	unsigned char		udev_path[SE_UDEV_PATH_LEN];
834	/* Pointer to template of function pointers for transport */
835	const struct target_backend_ops *transport;
 
 
836	struct se_lun		xcopy_lun;
837	/* Protection Information */
838	int			prot_length;
839	/* For se_lun->lun_se_dev RCU read-side critical access */
840	u32			hba_index;
841	struct rcu_head		rcu_head;
842};
843
844struct se_hba {
845	u16			hba_tpgt;
846	u32			hba_id;
847	/* See hba_flags_table */
848	u32			hba_flags;
849	/* Virtual iSCSI devices attached. */
850	u32			dev_count;
851	u32			hba_index;
852	/* Pointer to transport specific host structure. */
853	void			*hba_ptr;
854	struct list_head	hba_node;
855	spinlock_t		device_lock;
856	struct config_group	hba_group;
857	struct mutex		hba_access_mutex;
858	struct target_backend	*backend;
859};
860
861struct se_tpg_np {
862	struct se_portal_group *tpg_np_parent;
863	struct config_group	tpg_np_group;
864};
865
866static inline struct se_tpg_np *to_tpg_np(struct config_item *item)
867{
868	return container_of(to_config_group(item), struct se_tpg_np,
869			tpg_np_group);
870}
871
872struct se_portal_group {
873	/*
874	 * PROTOCOL IDENTIFIER value per SPC4, 7.5.1.
875	 *
876	 * Negative values can be used by fabric drivers for internal use TPGs.
877	 */
878	int			proto_id;
879	/* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
880	atomic_t		tpg_pr_ref_count;
881	/* Spinlock for adding/removing ACLed Nodes */
882	struct mutex		acl_node_mutex;
883	/* Spinlock for adding/removing sessions */
884	spinlock_t		session_lock;
885	struct mutex		tpg_lun_mutex;
 
886	/* linked list for initiator ACL list */
887	struct list_head	acl_node_list;
888	struct hlist_head	tpg_lun_hlist;
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	const 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_lun_group;
897	struct config_group	tpg_np_group;
898	struct config_group	tpg_acl_group;
899	struct config_group	tpg_attrib_group;
900	struct config_group	tpg_auth_group;
901	struct config_group	tpg_param_group;
902};
903
904static inline struct se_portal_group *to_tpg(struct config_item *item)
905{
906	return container_of(to_config_group(item), struct se_portal_group,
907			tpg_group);
908}
909
910static inline struct se_portal_group *attrib_to_tpg(struct config_item *item)
911{
912	return container_of(to_config_group(item), struct se_portal_group,
913			tpg_attrib_group);
914}
915
916static inline struct se_portal_group *auth_to_tpg(struct config_item *item)
917{
918	return container_of(to_config_group(item), struct se_portal_group,
919			tpg_auth_group);
920}
921
922static inline struct se_portal_group *param_to_tpg(struct config_item *item)
923{
924	return container_of(to_config_group(item), struct se_portal_group,
925			tpg_param_group);
926}
927
928struct se_wwn {
929	struct target_fabric_configfs *wwn_tf;
930	void			*priv;
931	struct config_group	wwn_group;
932	struct config_group	fabric_stat_group;
933};
934
935static inline void atomic_inc_mb(atomic_t *v)
936{
937	smp_mb__before_atomic();
938	atomic_inc(v);
939	smp_mb__after_atomic();
940}
941
942static inline void atomic_dec_mb(atomic_t *v)
943{
944	smp_mb__before_atomic();
945	atomic_dec(v);
946	smp_mb__after_atomic();
947}
948
949static inline void target_free_tag(struct se_session *sess, struct se_cmd *cmd)
950{
951	sbitmap_queue_clear(&sess->sess_tag_pool, cmd->map_tag, cmd->map_cpu);
952}
953
954#endif /* TARGET_CORE_BASE_H */