1 #ifndef TARGET_CORE_BACKEND_H
2 #define TARGET_CORE_BACKEND_H
4 #include <linux/types.h>
5 #include <target/target_core_base.h>
7 #define TRANSPORT_FLAG_PASSTHROUGH 0x1
9 * ALUA commands, state checks and setup operations are handled by the
12 #define TRANSPORT_FLAG_PASSTHROUGH_ALUA 0x2
17 struct target_backend_ops
{
19 char inquiry_prod
[16];
25 int (*attach_hba
)(struct se_hba
*, u32
);
26 void (*detach_hba
)(struct se_hba
*);
27 int (*pmode_enable_hba
)(struct se_hba
*, unsigned long);
29 struct se_device
*(*alloc_device
)(struct se_hba
*, const char *);
30 int (*configure_device
)(struct se_device
*);
31 void (*free_device
)(struct se_device
*device
);
33 ssize_t (*set_configfs_dev_params
)(struct se_device
*,
34 const char *, ssize_t
);
35 ssize_t (*show_configfs_dev_params
)(struct se_device
*, char *);
37 void (*transport_complete
)(struct se_cmd
*cmd
,
41 sense_reason_t (*parse_cdb
)(struct se_cmd
*cmd
);
42 u32 (*get_device_type
)(struct se_device
*);
43 sector_t (*get_blocks
)(struct se_device
*);
44 sector_t (*get_alignment_offset_lbas
)(struct se_device
*);
45 /* lbppbe = logical blocks per physical block exponent. see SBC-3 */
46 unsigned int (*get_lbppbe
)(struct se_device
*);
47 unsigned int (*get_io_min
)(struct se_device
*);
48 unsigned int (*get_io_opt
)(struct se_device
*);
49 unsigned char *(*get_sense_buffer
)(struct se_cmd
*);
50 bool (*get_write_cache
)(struct se_device
*);
51 int (*init_prot
)(struct se_device
*);
52 int (*format_prot
)(struct se_device
*);
53 void (*free_prot
)(struct se_device
*);
55 struct configfs_attribute
**tb_dev_attrib_attrs
;
59 sense_reason_t (*execute_rw
)(struct se_cmd
*cmd
, struct scatterlist
*,
60 u32
, enum dma_data_direction
);
61 sense_reason_t (*execute_sync_cache
)(struct se_cmd
*cmd
);
62 sense_reason_t (*execute_write_same
)(struct se_cmd
*cmd
);
63 sense_reason_t (*execute_unmap
)(struct se_cmd
*cmd
,
64 sector_t lba
, sector_t nolb
);
67 int transport_backend_register(const struct target_backend_ops
*);
68 void target_backend_unregister(const struct target_backend_ops
*);
70 void target_complete_cmd(struct se_cmd
*, u8
);
71 void target_complete_cmd_with_length(struct se_cmd
*, u8
, int);
73 sense_reason_t
spc_parse_cdb(struct se_cmd
*cmd
, unsigned int *size
);
74 sense_reason_t
spc_emulate_report_luns(struct se_cmd
*cmd
);
75 sense_reason_t
spc_emulate_inquiry_std(struct se_cmd
*, unsigned char *);
76 sense_reason_t
spc_emulate_evpd_83(struct se_cmd
*, unsigned char *);
78 sense_reason_t
sbc_parse_cdb(struct se_cmd
*cmd
, struct sbc_ops
*ops
);
79 u32
sbc_get_device_rev(struct se_device
*dev
);
80 u32
sbc_get_device_type(struct se_device
*dev
);
81 sector_t
sbc_get_write_same_sectors(struct se_cmd
*cmd
);
82 void sbc_dif_generate(struct se_cmd
*);
83 sense_reason_t
sbc_dif_verify(struct se_cmd
*, sector_t
, unsigned int,
84 unsigned int, struct scatterlist
*, int);
85 void sbc_dif_copy_prot(struct se_cmd
*, unsigned int, bool,
86 struct scatterlist
*, int);
87 void transport_set_vpd_proto_id(struct t10_vpd
*, unsigned char *);
88 int transport_set_vpd_assoc(struct t10_vpd
*, unsigned char *);
89 int transport_set_vpd_ident_type(struct t10_vpd
*, unsigned char *);
90 int transport_set_vpd_ident(struct t10_vpd
*, unsigned char *);
92 extern struct configfs_attribute
*sbc_attrib_attrs
[];
93 extern struct configfs_attribute
*passthrough_attrib_attrs
[];
95 /* core helpers also used by command snooping in pscsi */
96 void *transport_kmap_data_sg(struct se_cmd
*);
97 void transport_kunmap_data_sg(struct se_cmd
*);
98 /* core helpers also used by xcopy during internal command setup */
99 sense_reason_t
transport_generic_map_mem_to_cmd(struct se_cmd
*,
100 struct scatterlist
*, u32
, struct scatterlist
*, u32
);
102 bool target_lun_is_rdonly(struct se_cmd
*);
103 sense_reason_t
passthrough_parse_cdb(struct se_cmd
*cmd
,
104 sense_reason_t (*exec_cmd
)(struct se_cmd
*cmd
));
106 bool target_sense_desc_format(struct se_device
*dev
);
107 sector_t
target_to_linux_sector(struct se_device
*dev
, sector_t lb
);
108 bool target_configure_unmap_from_queue(struct se_dev_attrib
*attrib
,
109 struct request_queue
*q
);
111 #endif /* TARGET_CORE_BACKEND_H */