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bsg.h
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#ifndef BSG_H #define BSG_H #include <linux/types.h> #define BSG_PROTOCOL_SCSI 0 #define BSG_SUB_PROTOCOL_SCSI_CMD 0 #define BSG_SUB_PROTOCOL_SCSI_TMF 1 #define BSG_SUB_PROTOCOL_SCSI_TRANSPORT 2 /* * For flag constants below: * sg.h sg_io_hdr also has bits defined for it's flags member. These * two flag values (0x10 and 0x20) have the same meaning in sg.h . For * bsg the BSG_FLAG_Q_AT_HEAD flag is ignored since it is the deafult. */ #define BSG_FLAG_Q_AT_TAIL 0x10 /* default is Q_AT_HEAD */ #define BSG_FLAG_Q_AT_HEAD 0x20 struct sg_io_v4 { __s32 guard; /* [i] 'Q' to differentiate from v3 */ __u32 protocol; /* [i] 0 -> SCSI , .... */ __u32 subprotocol; /* [i] 0 -> SCSI command, 1 -> SCSI task management function, .... */ __u32 request_len; /* [i] in bytes */ __u64 request; /* [i], [*i] {SCSI: cdb} */ __u64 request_tag; /* [i] {SCSI: task tag (only if flagged)} */ __u32 request_attr; /* [i] {SCSI: task attribute} */ __u32 request_priority; /* [i] {SCSI: task priority} */ __u32 request_extra; /* [i] {spare, for padding} */ __u32 max_response_len; /* [i] in bytes */ __u64 response; /* [i], [*o] {SCSI: (auto)sense data} */ /* "dout_": data out (to device); "din_": data in (from device) */ __u32 dout_iovec_count; /* [i] 0 -> "flat" dout transfer else dout_xfer points to array of iovec */ __u32 dout_xfer_len; /* [i] bytes to be transferred to device */ __u32 din_iovec_count; /* [i] 0 -> "flat" din transfer */ __u32 din_xfer_len; /* [i] bytes to be transferred from device */ __u64 dout_xferp; /* [i], [*i] */ __u64 din_xferp; /* [i], [*o] */ __u32 timeout; /* [i] units: millisecond */ __u32 flags; /* [i] bit mask */ __u64 usr_ptr; /* [i->o] unused internally */ __u32 spare_in; /* [i] */ __u32 driver_status; /* [o] 0 -> ok */ __u32 transport_status; /* [o] 0 -> ok */ __u32 device_status; /* [o] {SCSI: command completion status} */ __u32 retry_delay; /* [o] {SCSI: status auxiliary information} */ __u32 info; /* [o] additional information */ __u32 duration; /* [o] time to complete, in milliseconds */ __u32 response_len; /* [o] bytes of response actually written */ __s32 din_resid; /* [o] din_xfer_len - actual_din_xfer_len */ __s32 dout_resid; /* [o] dout_xfer_len - actual_dout_xfer_len */ __u64 generated_tag; /* [o] {SCSI: transport generated task tag} */ __u32 spare_out; /* [o] */ __u32 padding; }; #endif /* BSG_H */