Release 4.14 include/target/target_core_backend.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef TARGET_CORE_BACKEND_H

#define TARGET_CORE_BACKEND_H

#include <linux/types.h>
#include <asm/unaligned.h>
#include <target/target_core_base.h>


#define TRANSPORT_FLAG_PASSTHROUGH		0x1
/*
 * ALUA commands, state checks and setup operations are handled by the
 * backend module.
 */

#define TRANSPORT_FLAG_PASSTHROUGH_ALUA		0x2

#define TRANSPORT_FLAG_PASSTHROUGH_PGR          0x4

struct request_queue;
struct scatterlist;


struct target_backend_ops {
	
char name[16];
	
char inquiry_prod[16];
	
char inquiry_rev[4];
	
struct module *owner;

	
u8 transport_flags;

	
int (*attach_hba)(struct se_hba *, u32);
	
void (*detach_hba)(struct se_hba *);
	
int (*pmode_enable_hba)(struct se_hba *, unsigned long);

	
struct se_device *(*alloc_device)(struct se_hba *, const char *);
	
int (*configure_device)(struct se_device *);
	
void (*destroy_device)(struct se_device *);
	
void (*free_device)(struct se_device *device);

	
ssize_t (*set_configfs_dev_params)(struct se_device *,
					   const char *, ssize_t);
	
ssize_t (*show_configfs_dev_params)(struct se_device *, char *);

	
sense_reason_t (*parse_cdb)(struct se_cmd *cmd);
	
u32 (*get_device_type)(struct se_device *);
	
sector_t (*get_blocks)(struct se_device *);
	
sector_t (*get_alignment_offset_lbas)(struct se_device *);
	/* lbppbe = logical blocks per physical block exponent. see SBC-3 */
	
unsigned int (*get_lbppbe)(struct se_device *);
	
unsigned int (*get_io_min)(struct se_device *);
	
unsigned int (*get_io_opt)(struct se_device *);
	
unsigned char *(*get_sense_buffer)(struct se_cmd *);
	
bool (*get_write_cache)(struct se_device *);
	
int (*init_prot)(struct se_device *);
	
int (*format_prot)(struct se_device *);
	
void (*free_prot)(struct se_device *);

	
struct configfs_attribute **tb_dev_attrib_attrs;
};


struct sbc_ops {
	
sense_reason_t (*execute_rw)(struct se_cmd *cmd, struct scatterlist *,
				     u32, enum dma_data_direction);
	
sense_reason_t (*execute_sync_cache)(struct se_cmd *cmd);
	
sense_reason_t (*execute_write_same)(struct se_cmd *cmd);
	
sense_reason_t (*execute_unmap)(struct se_cmd *cmd,
				sector_t lba, sector_t nolb);
};

int	transport_backend_register(const struct target_backend_ops *);
void	target_backend_unregister(const struct target_backend_ops *);

void	target_complete_cmd(struct se_cmd *, u8);
void	target_complete_cmd_with_length(struct se_cmd *, u8, int);

void	transport_copy_sense_to_cmd(struct se_cmd *, unsigned char *);

sense_reason_t	spc_parse_cdb(struct se_cmd *cmd, unsigned int *size);
sense_reason_t	spc_emulate_report_luns(struct se_cmd *cmd);
sense_reason_t	spc_emulate_inquiry_std(struct se_cmd *, unsigned char *);
sense_reason_t	spc_emulate_evpd_83(struct se_cmd *, unsigned char *);

sense_reason_t	sbc_parse_cdb(struct se_cmd *cmd, struct sbc_ops *ops);
u32	sbc_get_device_rev(struct se_device *dev);
u32	sbc_get_device_type(struct se_device *dev);
sector_t	sbc_get_write_same_sectors(struct se_cmd *cmd);
void	sbc_dif_generate(struct se_cmd *);
sense_reason_t	sbc_dif_verify(struct se_cmd *, sector_t, unsigned int,
				     unsigned int, struct scatterlist *, int);
void sbc_dif_copy_prot(struct se_cmd *, unsigned int, bool,
		       struct scatterlist *, int);
void	transport_set_vpd_proto_id(struct t10_vpd *, unsigned char *);
int	transport_set_vpd_assoc(struct t10_vpd *, unsigned char *);
int	transport_set_vpd_ident_type(struct t10_vpd *, unsigned char *);
int	transport_set_vpd_ident(struct t10_vpd *, unsigned char *);

extern struct configfs_attribute *sbc_attrib_attrs[];
extern struct configfs_attribute *passthrough_attrib_attrs[];

/* core helpers also used by command snooping in pscsi */
void	*transport_kmap_data_sg(struct se_cmd *);
void	transport_kunmap_data_sg(struct se_cmd *);
/* core helpers also used by xcopy during internal command setup */
sense_reason_t	transport_generic_map_mem_to_cmd(struct se_cmd *,
		struct scatterlist *, u32, struct scatterlist *, u32);

bool	target_lun_is_rdonly(struct se_cmd *);
sense_reason_t passthrough_parse_cdb(struct se_cmd *cmd,
	sense_reason_t (*exec_cmd)(struct se_cmd *cmd));

struct	se_device *target_find_device(int id, bool do_depend);

bool target_sense_desc_format(struct se_device *dev);
sector_t target_to_linux_sector(struct se_device *dev, sector_t lb);
bool target_configure_unmap_from_queue(struct se_dev_attrib *attrib,
				       struct request_queue *q);


/* Only use get_unaligned_be24() if reading p - 1 is allowed. */


static inline uint32_t get_unaligned_be24(const uint8_t *const p)
{
	return get_unaligned_be32(p - 1) & 0xffffffU;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Bart Van Assche
23
100.00%
1
100.00%
Total
23
100.00%
1
100.00%

#endif /* TARGET_CORE_BACKEND_H */
Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
Christoph Hellwig
416
52.53%
15
34.88%
Nicholas Bellinger
127
16.04%
8
18.60%
Andy Grover
73
9.22%
4
9.30%
Michael Christie
67
8.46%
5
11.63%
Bart Van Assche
39
4.92%
2
4.65%
Hannes Reinecke
24
3.03%
1
2.33%
Roland Dreier
21
2.65%
2
4.65%
Sagi Grimberg
13
1.64%
2
4.65%
Bryant G. Ly
4
0.51%
1
2.33%
Jörn Engel
4
0.51%
1
2.33%
Paolo Bonzini
3
0.38%
1
2.33%
Greg Kroah-Hartman
1
0.13%
1
2.33%
Total
792
100.00%
43
100.00%
Directory: include/target

Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.