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include/target/target_core_backend.h
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/* SPDX-License-Identifier: GPL-2.0 */ |
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#ifndef TARGET_CORE_BACKEND_H #define TARGET_CORE_BACKEND_H |
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#include <linux/types.h> |
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#include <asm/unaligned.h> |
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#include <target/target_core_base.h> |
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#define TRANSPORT_FLAG_PASSTHROUGH 0x1 /* * ALUA commands, state checks and setup operations are handled by the * backend module. */ #define TRANSPORT_FLAG_PASSTHROUGH_ALUA 0x2 |
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#define TRANSPORT_FLAG_PASSTHROUGH_PGR 0x4 |
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struct request_queue; struct scatterlist; |
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struct target_backend_ops { |
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char name[16]; |
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char inquiry_prod[16]; char inquiry_rev[4]; |
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struct module *owner; |
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u8 transport_flags; |
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int (*attach_hba)(struct se_hba *, u32); void (*detach_hba)(struct se_hba *); int (*pmode_enable_hba)(struct se_hba *, unsigned long); |
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struct se_device *(*alloc_device)(struct se_hba *, const char *); int (*configure_device)(struct se_device *); |
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void (*destroy_device)(struct se_device *); |
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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 *); |
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sense_reason_t (*parse_cdb)(struct se_cmd *cmd); |
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u32 (*get_device_type)(struct se_device *); sector_t (*get_blocks)(struct se_device *); |
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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 *); |
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unsigned char *(*get_sense_buffer)(struct se_cmd *); |
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bool (*get_write_cache)(struct se_device *); |
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int (*init_prot)(struct se_device *); int (*format_prot)(struct se_device *); void (*free_prot)(struct se_device *); |
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struct configfs_attribute **tb_dev_attrib_attrs; |
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}; |
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struct sbc_ops { |
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sense_reason_t (*execute_rw)(struct se_cmd *cmd, struct scatterlist *, u32, enum dma_data_direction); |
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sense_reason_t (*execute_sync_cache)(struct se_cmd *cmd); sense_reason_t (*execute_write_same)(struct se_cmd *cmd); |
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sense_reason_t (*execute_unmap)(struct se_cmd *cmd, sector_t lba, sector_t nolb); |
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}; |
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int transport_backend_register(const struct target_backend_ops *); void target_backend_unregister(const struct target_backend_ops *); |
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void target_complete_cmd(struct se_cmd *, u8); |
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void target_complete_cmd_with_length(struct se_cmd *, u8, int); |
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void transport_copy_sense_to_cmd(struct se_cmd *, unsigned char *); |
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sense_reason_t spc_parse_cdb(struct se_cmd *cmd, unsigned int *size); sense_reason_t spc_emulate_report_luns(struct se_cmd *cmd); |
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sense_reason_t spc_emulate_inquiry_std(struct se_cmd *, unsigned char *); sense_reason_t spc_emulate_evpd_83(struct se_cmd *, unsigned char *); |
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sense_reason_t sbc_parse_cdb(struct se_cmd *cmd, struct sbc_ops *ops); |
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u32 sbc_get_device_rev(struct se_device *dev); u32 sbc_get_device_type(struct se_device *dev); |
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sector_t sbc_get_write_same_sectors(struct se_cmd *cmd); |
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void sbc_dif_generate(struct se_cmd *); |
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sense_reason_t sbc_dif_verify(struct se_cmd *, sector_t, unsigned int, |
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unsigned int, struct scatterlist *, int); |
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void sbc_dif_copy_prot(struct se_cmd *, unsigned int, bool, struct scatterlist *, int); |
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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 *); |
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extern struct configfs_attribute *sbc_attrib_attrs[]; extern struct configfs_attribute *passthrough_attrib_attrs[]; |
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/* core helpers also used by command snooping in pscsi */ |
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void *transport_kmap_data_sg(struct se_cmd *); void transport_kunmap_data_sg(struct se_cmd *); |
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/* core helpers also used by xcopy during internal command setup */ |
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sense_reason_t transport_generic_map_mem_to_cmd(struct se_cmd *, struct scatterlist *, u32, struct scatterlist *, u32); |
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bool target_lun_is_rdonly(struct se_cmd *); |
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sense_reason_t passthrough_parse_cdb(struct se_cmd *cmd, sense_reason_t (*exec_cmd)(struct se_cmd *cmd)); |
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struct se_device *target_find_device(int id, bool do_depend); |
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bool target_sense_desc_format(struct se_device *dev); |
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sector_t target_to_linux_sector(struct se_device *dev, sector_t lb); bool target_configure_unmap_from_queue(struct se_dev_attrib *attrib, |
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struct request_queue *q); |
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/* 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; } |
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#endif /* TARGET_CORE_BACKEND_H */ |