41861fa831
This patch adds support for DIF read/write verify emulation for TARGET_DIF_TYPE1_PROT + TARGET_DIF_TYPE3_PROT operation. This includes sbc_dif_verify_write() + sbc_dif_verify_read() calls accessable by backend drivers to perform DIF verify for SGL based data and protection information. Also included is sbc_dif_copy_prot() logic to copy protection information to/from backend provided protection SGLs. Based on scsi_debug.c DIF TYPE1+TYPE3 emulation. v2 changes: - Select CRC_T10DIF for TARGET_CORE in Kconfig (Fengguang) - Drop IP checksum logic from sbc_dif_v1_verify (MKP) - Fix offset on app_tag = 0xffff in sbc_dif_verify_read() Cc: Martin K. Petersen <martin.petersen@oracle.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Hannes Reinecke <hare@suse.de> Cc: Sagi Grimberg <sagig@mellanox.com> Cc: Or Gerlitz <ogerlitz@mellanox.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
96 lines
3.7 KiB
C
96 lines
3.7 KiB
C
#ifndef TARGET_CORE_BACKEND_H
|
|
#define TARGET_CORE_BACKEND_H
|
|
|
|
#define TRANSPORT_PLUGIN_PHBA_PDEV 1
|
|
#define TRANSPORT_PLUGIN_VHBA_PDEV 2
|
|
#define TRANSPORT_PLUGIN_VHBA_VDEV 3
|
|
|
|
struct se_subsystem_api {
|
|
struct list_head sub_api_list;
|
|
|
|
char name[16];
|
|
char inquiry_prod[16];
|
|
char inquiry_rev[4];
|
|
struct module *owner;
|
|
|
|
u8 transport_type;
|
|
|
|
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 (*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 *);
|
|
|
|
void (*transport_complete)(struct se_cmd *cmd,
|
|
struct scatterlist *,
|
|
unsigned 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 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_write_same_unmap)(struct se_cmd *cmd);
|
|
sense_reason_t (*execute_unmap)(struct se_cmd *cmd);
|
|
};
|
|
|
|
int transport_subsystem_register(struct se_subsystem_api *);
|
|
void transport_subsystem_release(struct se_subsystem_api *);
|
|
|
|
void target_complete_cmd(struct se_cmd *, u8);
|
|
|
|
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);
|
|
sense_reason_t sbc_execute_unmap(struct se_cmd *cmd,
|
|
sense_reason_t (*do_unmap_fn)(struct se_cmd *cmd, void *priv,
|
|
sector_t lba, sector_t nolb),
|
|
void *priv);
|
|
sense_reason_t sbc_dif_verify_write(struct se_cmd *, sector_t, unsigned int,
|
|
unsigned int, struct scatterlist *, int);
|
|
sense_reason_t sbc_dif_verify_read(struct se_cmd *, sector_t, unsigned int,
|
|
unsigned int, 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 *);
|
|
|
|
/* 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 */
|
|
int target_alloc_sgl(struct scatterlist **, unsigned int *, u32, bool);
|
|
sense_reason_t transport_generic_map_mem_to_cmd(struct se_cmd *,
|
|
struct scatterlist *, u32, struct scatterlist *, u32);
|
|
|
|
void array_free(void *array, int n);
|
|
|
|
#endif /* TARGET_CORE_BACKEND_H */
|