/* SPDX-License-Identifier: GPL-2.0 */#ifndef TARGET_CORE_BACKEND_H#define TARGET_CORE_BACKEND_H #include <linux/types.h>#include <linux/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 block_device;struct scatterlist; struct target_backend_ops {	char name[16];	char inquiry_prod[16];	char inquiry_rev[4];	struct module *owner; 	u8 transport_flags_default;	u8 transport_flags_changeable; 	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);	struct se_dev_plug *(*plug_device)(struct se_device *se_dev);	void (*unplug_device)(struct se_dev_plug *se_plug); 	bool (*configure_unmap)(struct se_device *se_dev);	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);	void (*tmr_notify)(struct se_device *se_dev, enum tcm_tmreq_table,			   struct list_head *aborted_cmds);	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 configfs_attribute **tb_dev_action_attrs;}; struct exec_cmd_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);	sense_reason_t (*execute_pr_out)(struct se_cmd *cmd, u8 sa, u64 key,					 u64 sa_key, u8 type, bool aptpl);	sense_reason_t (*execute_pr_in)(struct se_cmd *cmd, u8 sa,					unsigned char *param_data);}; 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_set_cmd_data_length(struct se_cmd *, int);void	target_complete_cmd_with_sense(struct se_cmd *, u8, sense_reason_t);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 exec_cmd_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[];extern struct configfs_attribute *passthrough_pr_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)); 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_bdev(struct se_dev_attrib *attrib,				      struct block_device *bdev);void target_configure_write_atomic_from_bdev(struct se_dev_attrib *attrib,					     struct block_device *bdev); static inline bool target_dev_configured(struct se_device *se_dev){	return !!(se_dev->dev_flags & DF_CONFIGURED);} #endif /* TARGET_CORE_BACKEND_H */