[deliverable/linux.git] / include / target / target_core_transport.h

#ifndef TARGET_CORE_TRANSPORT_H
#define TARGET_CORE_TRANSPORT_H

#define TARGET_CORE_VERSION			TARGET_CORE_MOD_VERSION

/* Attempts before moving from SHORT to LONG */
#define PYX_TRANSPORT_WINDOW_CLOSED_THRESHOLD	3
#define PYX_TRANSPORT_WINDOW_CLOSED_WAIT_SHORT	3  /* In milliseconds */
#define PYX_TRANSPORT_WINDOW_CLOSED_WAIT_LONG	10 /* In milliseconds */

#define PYX_TRANSPORT_STATUS_INTERVAL		5 /* In seconds */

#define TRANSPORT_PLUGIN_PHBA_PDEV		1
#define TRANSPORT_PLUGIN_VHBA_PDEV		2
#define TRANSPORT_PLUGIN_VHBA_VDEV		3

/*
 * struct se_subsystem_dev->su_dev_flags
*/
#define SDF_FIRMWARE_VPD_UNIT_SERIAL		0x00000001
#define SDF_EMULATED_VPD_UNIT_SERIAL		0x00000002
#define SDF_USING_UDEV_PATH			0x00000004
#define SDF_USING_ALIAS				0x00000008

/*
 * struct se_device->dev_flags
 */
#define DF_READ_ONLY				0x00000001
#define DF_SPC2_RESERVATIONS			0x00000002
#define DF_SPC2_RESERVATIONS_WITH_ISID		0x00000004

/* struct se_dev_attrib sanity values */
/* Default max_unmap_lba_count */
#define DA_MAX_UNMAP_LBA_COUNT			0
/* Default max_unmap_block_desc_count */
#define DA_MAX_UNMAP_BLOCK_DESC_COUNT		0
/* Default unmap_granularity */
#define DA_UNMAP_GRANULARITY_DEFAULT		0
/* Default unmap_granularity_alignment */
#define DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT	0
/* Emulation for Direct Page Out */
#define DA_EMULATE_DPO				0
/* Emulation for Forced Unit Access WRITEs */
#define DA_EMULATE_FUA_WRITE			1
/* Emulation for Forced Unit Access READs */
#define DA_EMULATE_FUA_READ			0
/* Emulation for WriteCache and SYNCHRONIZE_CACHE */
#define DA_EMULATE_WRITE_CACHE			0
/* Emulation for UNIT ATTENTION Interlock Control */
#define DA_EMULATE_UA_INTLLCK_CTRL		0
/* Emulation for TASK_ABORTED status (TAS) by default */
#define DA_EMULATE_TAS				1
/* Emulation for Thin Provisioning UNMAP using block/blk-lib.c:blkdev_issue_discard() */
#define DA_EMULATE_TPU				0
/*
 * Emulation for Thin Provisioning WRITE_SAME w/ UNMAP=1 bit using
 * block/blk-lib.c:blkdev_issue_discard()
 */
#define DA_EMULATE_TPWS				0
/* No Emulation for PSCSI by default */
#define DA_EMULATE_RESERVATIONS			0
/* No Emulation for PSCSI by default */
#define DA_EMULATE_ALUA				0
/* Enforce SCSI Initiator Port TransportID with 'ISID' for PR */
#define DA_ENFORCE_PR_ISIDS			1
#define DA_STATUS_MAX_SECTORS_MIN		16
#define DA_STATUS_MAX_SECTORS_MAX		8192
/* By default don't report non-rotating (solid state) medium */
#define DA_IS_NONROT				0
/* Queue Algorithm Modifier default for restricted reordering in control mode page */
#define DA_EMULATE_REST_REORD			0

#define SE_MODE_PAGE_BUF			512

#define MOD_MAX_SECTORS(ms, bs)			(ms % (PAGE_SIZE / bs))

struct se_subsystem_api;

extern int init_se_kmem_caches(void);
extern void release_se_kmem_caches(void);
extern u32 scsi_get_new_index(scsi_index_t);
extern void transport_init_queue_obj(struct se_queue_obj *);
extern void transport_subsystem_check_init(void);
extern int transport_subsystem_register(struct se_subsystem_api *);
extern void transport_subsystem_release(struct se_subsystem_api *);
extern void transport_load_plugins(void);
extern struct se_session *transport_init_session(void);
extern void __transport_register_session(struct se_portal_group *,
					struct se_node_acl *,
					struct se_session *, void *);
extern void transport_register_session(struct se_portal_group *,
					struct se_node_acl *,
					struct se_session *, void *);
extern void transport_free_session(struct se_session *);
extern void transport_deregister_session_configfs(struct se_session *);
extern void transport_deregister_session(struct se_session *);
extern void transport_cmd_finish_abort(struct se_cmd *, int);
extern void transport_complete_sync_cache(struct se_cmd *, int);
extern void transport_complete_task(struct se_task *, int);
extern void transport_add_task_to_execute_queue(struct se_task *,
						struct se_task *,
						struct se_device *);
extern void transport_remove_task_from_execute_queue(struct se_task *,
						struct se_device *);
extern void __transport_remove_task_from_execute_queue(struct se_task *,
						struct se_device *);
unsigned char *transport_dump_cmd_direction(struct se_cmd *);
extern void transport_dump_dev_state(struct se_device *, char *, int *);
extern void transport_dump_dev_info(struct se_device *, struct se_lun *,
					unsigned long long, char *, int *);
extern void transport_dump_vpd_proto_id(struct t10_vpd *,
					unsigned char *, int);
extern void transport_set_vpd_proto_id(struct t10_vpd *, unsigned char *);
extern int transport_dump_vpd_assoc(struct t10_vpd *,
					unsigned char *, int);
extern int transport_set_vpd_assoc(struct t10_vpd *, unsigned char *);
extern int transport_dump_vpd_ident_type(struct t10_vpd *,
					unsigned char *, int);
extern int transport_set_vpd_ident_type(struct t10_vpd *, unsigned char *);
extern int transport_dump_vpd_ident(struct t10_vpd *,
					unsigned char *, int);
extern int transport_set_vpd_ident(struct t10_vpd *, unsigned char *);
extern struct se_device *transport_add_device_to_core_hba(struct se_hba *,
					struct se_subsystem_api *,
					struct se_subsystem_dev *, u32,
					void *, struct se_dev_limits *,
					const char *, const char *);
extern void transport_init_se_cmd(struct se_cmd *,
					struct target_core_fabric_ops *,
					struct se_session *, u32, int, int,
					unsigned char *);
void *transport_kmap_first_data_page(struct se_cmd *cmd);
void transport_kunmap_first_data_page(struct se_cmd *cmd);
extern int transport_generic_allocate_tasks(struct se_cmd *, unsigned char *);
extern int transport_handle_cdb_direct(struct se_cmd *);
extern int transport_generic_handle_cdb_map(struct se_cmd *);
extern int transport_generic_handle_data(struct se_cmd *);
extern int transport_generic_handle_tmr(struct se_cmd *);
extern bool target_stop_task(struct se_task *task, unsigned long *flags);
extern int transport_generic_map_mem_to_cmd(struct se_cmd *cmd, struct scatterlist *, u32,
				struct scatterlist *, u32);
extern int transport_clear_lun_from_sessions(struct se_lun *);
extern bool transport_wait_for_tasks(struct se_cmd *);
extern int transport_check_aborted_status(struct se_cmd *, int);
extern int transport_send_check_condition_and_sense(struct se_cmd *, u8, int);
extern void transport_send_task_abort(struct se_cmd *);
extern void transport_release_cmd(struct se_cmd *);
extern void transport_generic_free_cmd(struct se_cmd *, int);
extern void target_get_sess_cmd(struct se_session *, struct se_cmd *);
extern int target_put_sess_cmd(struct se_session *, struct se_cmd *);
extern void target_splice_sess_cmd_list(struct se_session *);
extern void target_wait_for_sess_cmds(struct se_session *, int);
extern void transport_generic_wait_for_cmds(struct se_cmd *, int);
extern void transport_do_task_sg_chain(struct se_cmd *);
extern void transport_generic_process_write(struct se_cmd *);
extern int transport_generic_new_cmd(struct se_cmd *);
extern int transport_generic_do_tmr(struct se_cmd *);
/* From target_core_alua.c */
extern int core_alua_check_nonop_delay(struct se_cmd *);
/* From target_core_cdb.c */
extern int transport_emulate_control_cdb(struct se_task *);
extern void target_get_task_cdb(struct se_task *task, unsigned char *cdb);

/*
 * Each se_transport_task_t can have N number of possible struct se_task's
 * for the storage transport(s) to possibly execute.
 * Used primarily for splitting up CDBs that exceed the physical storage
 * HBA's maximum sector count per task.
 */
struct se_mem {
	struct page	*se_page;
	u32		se_len;
	u32		se_off;
	struct list_head se_list;
} ____cacheline_aligned;

/*
 * 	Each type of disk transport supported MUST have a template defined
 *	within its .h file.
 */
struct se_subsystem_api {
	/*
	 * The Name. :-)
	 */
	char name[16];
	/*
	 * Transport Type.
	 */
	u8 transport_type;

	unsigned int fua_write_emulated : 1;
	unsigned int write_cache_emulated : 1;

	/*
	 * struct module for struct se_hba references
	 */
	struct module *owner;
	/*
	 * Used for global se_subsystem_api list_head
	 */
	struct list_head sub_api_list;
	/*
	 * attach_hba():
	 */
	int (*attach_hba)(struct se_hba *, u32);
	/*
	 * detach_hba():
	 */
	void (*detach_hba)(struct se_hba *);
	/*
	 * pmode_hba(): Used for TCM/pSCSI subsystem plugin HBA ->
	 *		Linux/SCSI struct Scsi_Host passthrough
	*/
	int (*pmode_enable_hba)(struct se_hba *, unsigned long);
	/*
	 * allocate_virtdevice():
	 */
	void *(*allocate_virtdevice)(struct se_hba *, const char *);
	/*
	 * create_virtdevice(): Only for Virtual HBAs
	 */
	struct se_device *(*create_virtdevice)(struct se_hba *,
				struct se_subsystem_dev *, void *);
	/*
	 * free_device():
	 */
	void (*free_device)(void *);

	/*
	 * transport_complete():
	 *
	 * Use transport_generic_complete() for majority of DAS transport
	 * drivers.  Provided out of convenience.
	 */
	int (*transport_complete)(struct se_task *task);
	struct se_task *(*alloc_task)(unsigned char *cdb);
	/*
	 * do_task():
	 */
	int (*do_task)(struct se_task *);
	/*
	 * Used by virtual subsystem plugins IBLOCK and FILEIO to emulate
	 * UNMAP and WRITE_SAME_* w/ UNMAP=1 <-> Linux/Block Discard
	 */
	int (*do_discard)(struct se_device *, sector_t, u32);
	/*
	 * Used  by virtual subsystem plugins IBLOCK and FILEIO to emulate
	 * SYNCHRONIZE_CACHE_* <-> Linux/Block blkdev_issue_flush()
	 */
	void (*do_sync_cache)(struct se_task *);
	/*
	 * free_task():
	 */
	void (*free_task)(struct se_task *);
	/*
	 * check_configfs_dev_params():
	 */
	ssize_t (*check_configfs_dev_params)(struct se_hba *, struct se_subsystem_dev *);
	/*
	 * set_configfs_dev_params():
	 */
	ssize_t (*set_configfs_dev_params)(struct se_hba *, struct se_subsystem_dev *,
						const char *, ssize_t);
	/*
	 * show_configfs_dev_params():
	 */
	ssize_t (*show_configfs_dev_params)(struct se_hba *, struct se_subsystem_dev *,
						char *);
	/*
	 * get_device_rev():
	 */
	u32 (*get_device_rev)(struct se_device *);
	/*
	 * get_device_type():
	 */
	u32 (*get_device_type)(struct se_device *);
	/*
	 * Get the sector_t from a subsystem backstore..
	 */
	sector_t (*get_blocks)(struct se_device *);
	/*
	 * get_sense_buffer():
	 */
	unsigned char *(*get_sense_buffer)(struct se_task *);
} ____cacheline_aligned;

#endif /* TARGET_CORE_TRANSPORT_H */
Commit	Line	Data
c66ac9db NB	1	#ifndef TARGET_CORE_TRANSPORT_H
	2	#define TARGET_CORE_TRANSPORT_H
	3
	4	#define TARGET_CORE_VERSION TARGET_CORE_MOD_VERSION
	5
	6	/* Attempts before moving from SHORT to LONG */
	7	#define PYX_TRANSPORT_WINDOW_CLOSED_THRESHOLD 3
	8	#define PYX_TRANSPORT_WINDOW_CLOSED_WAIT_SHORT 3 /* In milliseconds */
	9	#define PYX_TRANSPORT_WINDOW_CLOSED_WAIT_LONG 10 /* In milliseconds */
	10
	11	#define PYX_TRANSPORT_STATUS_INTERVAL 5 /* In seconds */
	12
c66ac9db NB	13	#define TRANSPORT_PLUGIN_PHBA_PDEV 1
	14	#define TRANSPORT_PLUGIN_VHBA_PDEV 2
	15	#define TRANSPORT_PLUGIN_VHBA_VDEV 3
	16
c66ac9db NB	17	/*
	18	* struct se_subsystem_dev->su_dev_flags
	19	*/
	20	#define SDF_FIRMWARE_VPD_UNIT_SERIAL 0x00000001
	21	#define SDF_EMULATED_VPD_UNIT_SERIAL 0x00000002
	22	#define SDF_USING_UDEV_PATH 0x00000004
	23	#define SDF_USING_ALIAS 0x00000008
	24
	25	/*
	26	* struct se_device->dev_flags
	27	*/
	28	#define DF_READ_ONLY 0x00000001
	29	#define DF_SPC2_RESERVATIONS 0x00000002
	30	#define DF_SPC2_RESERVATIONS_WITH_ISID 0x00000004
	31
	32	/* struct se_dev_attrib sanity values */
c66ac9db NB	33	/* Default max_unmap_lba_count */
	34	#define DA_MAX_UNMAP_LBA_COUNT 0
	35	/* Default max_unmap_block_desc_count */
	36	#define DA_MAX_UNMAP_BLOCK_DESC_COUNT 0
	37	/* Default unmap_granularity */
	38	#define DA_UNMAP_GRANULARITY_DEFAULT 0
	39	/* Default unmap_granularity_alignment */
	40	#define DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT 0
	41	/* Emulation for Direct Page Out */
	42	#define DA_EMULATE_DPO 0
	43	/* Emulation for Forced Unit Access WRITEs */
	44	#define DA_EMULATE_FUA_WRITE 1
	45	/* Emulation for Forced Unit Access READs */
	46	#define DA_EMULATE_FUA_READ 0
	47	/* Emulation for WriteCache and SYNCHRONIZE_CACHE */
	48	#define DA_EMULATE_WRITE_CACHE 0
	49	/* Emulation for UNIT ATTENTION Interlock Control */
	50	#define DA_EMULATE_UA_INTLLCK_CTRL 0
	51	/* Emulation for TASK_ABORTED status (TAS) by default */
	52	#define DA_EMULATE_TAS 1
	53	/* Emulation for Thin Provisioning UNMAP using block/blk-lib.c:blkdev_issue_discard() */
	54	#define DA_EMULATE_TPU 0
	55	/*
	56	* Emulation for Thin Provisioning WRITE_SAME w/ UNMAP=1 bit using
	57	* block/blk-lib.c:blkdev_issue_discard()
	58	*/
	59	#define DA_EMULATE_TPWS 0
	60	/* No Emulation for PSCSI by default */
	61	#define DA_EMULATE_RESERVATIONS 0
	62	/* No Emulation for PSCSI by default */
	63	#define DA_EMULATE_ALUA 0
	64	/* Enforce SCSI Initiator Port TransportID with 'ISID' for PR */
	65	#define DA_ENFORCE_PR_ISIDS 1
	66	#define DA_STATUS_MAX_SECTORS_MIN 16
	67	#define DA_STATUS_MAX_SECTORS_MAX 8192
e22a7f07 RD	68	/* By default don't report non-rotating (solid state) medium */
e22a7f07 RD	69	#define DA_IS_NONROT 0
5de619a3 NB	70	/* Queue Algorithm Modifier default for restricted reordering in control mode page */
5de619a3 NB	71	#define DA_EMULATE_REST_REORD 0
c66ac9db NB	72
	73	#define SE_MODE_PAGE_BUF 512
	74
	75	#define MOD_MAX_SECTORS(ms, bs) (ms % (PAGE_SIZE / bs))
	76
c66ac9db NB	77	struct se_subsystem_api;
c66ac9db NB	78
e3d6f909 AG	79	extern int init_se_kmem_caches(void);
e3d6f909 AG	80	extern void release_se_kmem_caches(void);
e89d15ee	81	extern u32 scsi_get_new_index(scsi_index_t);
c66ac9db	82	extern void transport_init_queue_obj(struct se_queue_obj *);
dbc5623e	83	extern void transport_subsystem_check_init(void);
c66ac9db NB	84	extern int transport_subsystem_register(struct se_subsystem_api *);
	85	extern void transport_subsystem_release(struct se_subsystem_api *);
	86	extern void transport_load_plugins(void);
	87	extern struct se_session *transport_init_session(void);
	88	extern void __transport_register_session(struct se_portal_group *,
	89	struct se_node_acl *,
	90	struct se_session , void );
	91	extern void transport_register_session(struct se_portal_group *,
	92	struct se_node_acl *,
	93	struct se_session , void );
	94	extern void transport_free_session(struct se_session *);
	95	extern void transport_deregister_session_configfs(struct se_session *);
	96	extern void transport_deregister_session(struct se_session *);
	97	extern void transport_cmd_finish_abort(struct se_cmd *, int);
c66ac9db NB	98	extern void transport_complete_sync_cache(struct se_cmd *, int);
	99	extern void transport_complete_task(struct se_task *, int);
	100	extern void transport_add_task_to_execute_queue(struct se_task *,
	101	struct se_task *,
	102	struct se_device *);
52208ae3 NB	103	extern void transport_remove_task_from_execute_queue(struct se_task *,
52208ae3 NB	104	struct se_device *);
04629b7b CH	105	extern void __transport_remove_task_from_execute_queue(struct se_task *,
04629b7b CH	106	struct se_device *);
c66ac9db NB	107	unsigned char transport_dump_cmd_direction(struct se_cmd );
	108	extern void transport_dump_dev_state(struct se_device , char , int *);
	109	extern void transport_dump_dev_info(struct se_device , struct se_lun ,
	110	unsigned long long, char , int );
	111	extern void transport_dump_vpd_proto_id(struct t10_vpd *,
	112	unsigned char *, int);
	113	extern void transport_set_vpd_proto_id(struct t10_vpd , unsigned char );
	114	extern int transport_dump_vpd_assoc(struct t10_vpd *,
	115	unsigned char *, int);
	116	extern int transport_set_vpd_assoc(struct t10_vpd , unsigned char );
	117	extern int transport_dump_vpd_ident_type(struct t10_vpd *,
	118	unsigned char *, int);
	119	extern int transport_set_vpd_ident_type(struct t10_vpd , unsigned char );
	120	extern int transport_dump_vpd_ident(struct t10_vpd *,
	121	unsigned char *, int);
	122	extern int transport_set_vpd_ident(struct t10_vpd , unsigned char );
	123	extern struct se_device transport_add_device_to_core_hba(struct se_hba ,
	124	struct se_subsystem_api *,
	125	struct se_subsystem_dev *, u32,
	126	void , struct se_dev_limits ,
	127	const char , const char );
c66ac9db NB	128	extern void transport_init_se_cmd(struct se_cmd *,
	129	struct target_core_fabric_ops *,
	130	struct se_session *, u32, int, int,
	131	unsigned char *);
05d1c7c0 AG	132	void transport_kmap_first_data_page(struct se_cmd cmd);
05d1c7c0 AG	133	void transport_kunmap_first_data_page(struct se_cmd *cmd);
c66ac9db	134	extern int transport_generic_allocate_tasks(struct se_cmd , unsigned char );
695434e1	135	extern int transport_handle_cdb_direct(struct se_cmd *);
c66ac9db NB	136	extern int transport_generic_handle_cdb_map(struct se_cmd *);
c66ac9db NB	137	extern int transport_generic_handle_data(struct se_cmd *);
c66ac9db	138	extern int transport_generic_handle_tmr(struct se_cmd *);
cdbb70bb	139	extern bool target_stop_task(struct se_task task, unsigned long flags);
c66ac9db NB	140	extern int transport_generic_map_mem_to_cmd(struct se_cmd cmd, struct scatterlist , u32,
	141	struct scatterlist *, u32);
	142	extern int transport_clear_lun_from_sessions(struct se_lun *);
a17f091d	143	extern bool transport_wait_for_tasks(struct se_cmd *);
c66ac9db NB	144	extern int transport_check_aborted_status(struct se_cmd *, int);
	145	extern int transport_send_check_condition_and_sense(struct se_cmd *, u8, int);
	146	extern void transport_send_task_abort(struct se_cmd *);
35462975	147	extern void transport_release_cmd(struct se_cmd *);
39c05f32	148	extern void transport_generic_free_cmd(struct se_cmd *, int);
a17f091d NB	149	extern void target_get_sess_cmd(struct se_session , struct se_cmd );
	150	extern int target_put_sess_cmd(struct se_session , struct se_cmd );
	151	extern void target_splice_sess_cmd_list(struct se_session *);
	152	extern void target_wait_for_sess_cmds(struct se_session *, int);
c66ac9db	153	extern void transport_generic_wait_for_cmds(struct se_cmd *, int);
c66ac9db NB	154	extern void transport_do_task_sg_chain(struct se_cmd *);
c66ac9db NB	155	extern void transport_generic_process_write(struct se_cmd *);
a1d8b49a	156	extern int transport_generic_new_cmd(struct se_cmd *);
c66ac9db NB	157	extern int transport_generic_do_tmr(struct se_cmd *);
	158	/* From target_core_alua.c */
	159	extern int core_alua_check_nonop_delay(struct se_cmd *);
5dd7ed2e DC	160	/* From target_core_cdb.c */
5dd7ed2e DC	161	extern int transport_emulate_control_cdb(struct se_task *);
485fd0d1	162	extern void target_get_task_cdb(struct se_task task, unsigned char cdb);
c66ac9db NB	163
	164	/*
	165	* Each se_transport_task_t can have N number of possible struct se_task's
	166	* for the storage transport(s) to possibly execute.
	167	* Used primarily for splitting up CDBs that exceed the physical storage
	168	* HBA's maximum sector count per task.
	169	*/
	170	struct se_mem {
	171	struct page *se_page;
	172	u32 se_len;
	173	u32 se_off;
	174	struct list_head se_list;
	175	} ____cacheline_aligned;
	176
	177	/*
	178	* Each type of disk transport supported MUST have a template defined
	179	* within its .h file.
	180	*/
	181	struct se_subsystem_api {
	182	/*
	183	* The Name. :-)
	184	*/
	185	char name[16];
	186	/*
	187	* Transport Type.
	188	*/
	189	u8 transport_type;
f55918fa CH	190
	191	unsigned int fua_write_emulated : 1;
	192	unsigned int write_cache_emulated : 1;
	193
c66ac9db NB	194	/*
	195	* struct module for struct se_hba references
	196	*/
	197	struct module *owner;
	198	/*
	199	* Used for global se_subsystem_api list_head
	200	*/
	201	struct list_head sub_api_list;
c66ac9db NB	202	/*
	203	* attach_hba():
	204	*/
	205	int (attach_hba)(struct se_hba , u32);
	206	/*
	207	* detach_hba():
	208	*/
	209	void (detach_hba)(struct se_hba );
	210	/*
	211	* pmode_hba(): Used for TCM/pSCSI subsystem plugin HBA ->
	212	* Linux/SCSI struct Scsi_Host passthrough
	213	*/
	214	int (pmode_enable_hba)(struct se_hba , unsigned long);
	215	/*
	216	* allocate_virtdevice():
	217	*/
	218	void (allocate_virtdevice)(struct se_hba , const char );
	219	/*
	220	* create_virtdevice(): Only for Virtual HBAs
	221	*/
	222	struct se_device (create_virtdevice)(struct se_hba *,
	223	struct se_subsystem_dev , void );
	224	/*
	225	* free_device():
	226	*/
	227	void (free_device)(void );
	228
c66ac9db NB	229	/*
	230	* transport_complete():
	231	*
	232	* Use transport_generic_complete() for majority of DAS transport
	233	* drivers. Provided out of convenience.
	234	*/
	235	int (transport_complete)(struct se_task task);
6708bb27	236	struct se_task (alloc_task)(unsigned char *cdb);
c66ac9db NB	237	/*
	238	* do_task():
	239	*/
	240	int (do_task)(struct se_task );
	241	/*
	242	* Used by virtual subsystem plugins IBLOCK and FILEIO to emulate
	243	* UNMAP and WRITE_SAME_* w/ UNMAP=1 <-> Linux/Block Discard
	244	*/
	245	int (do_discard)(struct se_device , sector_t, u32);
	246	/*
	247	* Used by virtual subsystem plugins IBLOCK and FILEIO to emulate
	248	* SYNCHRONIZE_CACHE_* <-> Linux/Block blkdev_issue_flush()
	249	*/
	250	void (do_sync_cache)(struct se_task );
	251	/*
	252	* free_task():
	253	*/
	254	void (free_task)(struct se_task );
	255	/*
	256	* check_configfs_dev_params():
	257	*/
	258	ssize_t (check_configfs_dev_params)(struct se_hba , struct se_subsystem_dev *);
	259	/*
	260	* set_configfs_dev_params():
	261	*/
	262	ssize_t (set_configfs_dev_params)(struct se_hba , struct se_subsystem_dev *,
	263	const char *, ssize_t);
	264	/*
	265	* show_configfs_dev_params():
	266	*/
	267	ssize_t (show_configfs_dev_params)(struct se_hba , struct se_subsystem_dev *,
	268	char *);
c66ac9db NB	269	/*
	270	* get_device_rev():
	271	*/
	272	u32 (get_device_rev)(struct se_device );
	273	/*
	274	* get_device_type():
	275	*/
	276	u32 (get_device_type)(struct se_device );
	277	/*
	278	* Get the sector_t from a subsystem backstore..
	279	*/
	280	sector_t (get_blocks)(struct se_device );
c66ac9db NB	281	/*
	282	* get_sense_buffer():
	283	*/
	284	unsigned char (get_sense_buffer)(struct se_task *);
	285	} ____cacheline_aligned;
	286
c66ac9db	287	#endif /* TARGET_CORE_TRANSPORT_H */