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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 flags member below
* sg.h sg_io_hdr also has bits defined for it's flags member. However
* none of these bits are implemented/used by bsg. The bits below are
* allocated to not conflict with sg.h ones anyway.
*/
#define BSG_FLAG_Q_AT_TAIL 0x10 /* default, == 0 at this bit, is Q_AT_HEAD */
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 */