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target_core_backend.h
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/* 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 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_queue(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 */