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Linux kernel mirror (for testing)
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kernel
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linux
1#ifndef TARGET_CORE_BACKEND_H
2#define TARGET_CORE_BACKEND_H
3
4#include <linux/types.h>
5#include <target/target_core_base.h>
6
7#define TRANSPORT_FLAG_PASSTHROUGH 0x1
8/*
9 * ALUA commands, state checks and setup operations are handled by the
10 * backend module.
11 */
12#define TRANSPORT_FLAG_PASSTHROUGH_ALUA 0x2
13#define TRANSPORT_FLAG_PASSTHROUGH_PGR 0x4
14
15struct request_queue;
16struct scatterlist;
17
18struct target_backend_ops {
19 char name[16];
20 char inquiry_prod[16];
21 char inquiry_rev[4];
22 struct module *owner;
23
24 u8 transport_flags;
25
26 int (*attach_hba)(struct se_hba *, u32);
27 void (*detach_hba)(struct se_hba *);
28 int (*pmode_enable_hba)(struct se_hba *, unsigned long);
29
30 struct se_device *(*alloc_device)(struct se_hba *, const char *);
31 int (*configure_device)(struct se_device *);
32 void (*free_device)(struct se_device *device);
33
34 ssize_t (*set_configfs_dev_params)(struct se_device *,
35 const char *, ssize_t);
36 ssize_t (*show_configfs_dev_params)(struct se_device *, char *);
37
38 void (*transport_complete)(struct se_cmd *cmd,
39 struct scatterlist *,
40 unsigned char *);
41
42 sense_reason_t (*parse_cdb)(struct se_cmd *cmd);
43 u32 (*get_device_type)(struct se_device *);
44 sector_t (*get_blocks)(struct se_device *);
45 sector_t (*get_alignment_offset_lbas)(struct se_device *);
46 /* lbppbe = logical blocks per physical block exponent. see SBC-3 */
47 unsigned int (*get_lbppbe)(struct se_device *);
48 unsigned int (*get_io_min)(struct se_device *);
49 unsigned int (*get_io_opt)(struct se_device *);
50 unsigned char *(*get_sense_buffer)(struct se_cmd *);
51 bool (*get_write_cache)(struct se_device *);
52 int (*init_prot)(struct se_device *);
53 int (*format_prot)(struct se_device *);
54 void (*free_prot)(struct se_device *);
55
56 struct configfs_attribute **tb_dev_attrib_attrs;
57};
58
59struct sbc_ops {
60 sense_reason_t (*execute_rw)(struct se_cmd *cmd, struct scatterlist *,
61 u32, enum dma_data_direction);
62 sense_reason_t (*execute_sync_cache)(struct se_cmd *cmd);
63 sense_reason_t (*execute_write_same)(struct se_cmd *cmd);
64 sense_reason_t (*execute_unmap)(struct se_cmd *cmd,
65 sector_t lba, sector_t nolb);
66};
67
68int transport_backend_register(const struct target_backend_ops *);
69void target_backend_unregister(const struct target_backend_ops *);
70
71void target_complete_cmd(struct se_cmd *, u8);
72void target_complete_cmd_with_length(struct se_cmd *, u8, int);
73
74sense_reason_t spc_parse_cdb(struct se_cmd *cmd, unsigned int *size);
75sense_reason_t spc_emulate_report_luns(struct se_cmd *cmd);
76sense_reason_t spc_emulate_inquiry_std(struct se_cmd *, unsigned char *);
77sense_reason_t spc_emulate_evpd_83(struct se_cmd *, unsigned char *);
78
79sense_reason_t sbc_parse_cdb(struct se_cmd *cmd, struct sbc_ops *ops);
80u32 sbc_get_device_rev(struct se_device *dev);
81u32 sbc_get_device_type(struct se_device *dev);
82sector_t sbc_get_write_same_sectors(struct se_cmd *cmd);
83void sbc_dif_generate(struct se_cmd *);
84sense_reason_t sbc_dif_verify(struct se_cmd *, sector_t, unsigned int,
85 unsigned int, struct scatterlist *, int);
86void sbc_dif_copy_prot(struct se_cmd *, unsigned int, bool,
87 struct scatterlist *, int);
88void transport_set_vpd_proto_id(struct t10_vpd *, unsigned char *);
89int transport_set_vpd_assoc(struct t10_vpd *, unsigned char *);
90int transport_set_vpd_ident_type(struct t10_vpd *, unsigned char *);
91int transport_set_vpd_ident(struct t10_vpd *, unsigned char *);
92
93extern struct configfs_attribute *sbc_attrib_attrs[];
94extern struct configfs_attribute *passthrough_attrib_attrs[];
95
96/* core helpers also used by command snooping in pscsi */
97void *transport_kmap_data_sg(struct se_cmd *);
98void transport_kunmap_data_sg(struct se_cmd *);
99/* core helpers also used by xcopy during internal command setup */
100sense_reason_t transport_generic_map_mem_to_cmd(struct se_cmd *,
101 struct scatterlist *, u32, struct scatterlist *, u32);
102
103bool target_lun_is_rdonly(struct se_cmd *);
104sense_reason_t passthrough_parse_cdb(struct se_cmd *cmd,
105 sense_reason_t (*exec_cmd)(struct se_cmd *cmd));
106
107bool target_sense_desc_format(struct se_device *dev);
108sector_t target_to_linux_sector(struct se_device *dev, sector_t lb);
109bool target_configure_unmap_from_queue(struct se_dev_attrib *attrib,
110 struct request_queue *q);
111
112#endif /* TARGET_CORE_BACKEND_H */