The C and C++ Include Header Files

/usr/include/linux/bsg.h


$ cat -n /usr/include/linux/bsg.h

     1	/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
     2	#ifndef BSG_H
     3	#define BSG_H
     4	
     5	#include <linux/types.h>
     6	
     7	#define BSG_PROTOCOL_SCSI		0
     8	
     9	#define BSG_SUB_PROTOCOL_SCSI_CMD	0
    10	#define BSG_SUB_PROTOCOL_SCSI_TMF	1
    11	#define BSG_SUB_PROTOCOL_SCSI_TRANSPORT	2
    12	
    13	/*
    14	 * For flag constants below:
    15	 * sg.h sg_io_hdr also has bits defined for it's flags member. These
    16	 * two flag values (0x10 and 0x20) have the same meaning in sg.h . For
    17	 * bsg the BSG_FLAG_Q_AT_HEAD flag is ignored since it is the deafult.
    18	 */
    19	#define BSG_FLAG_Q_AT_TAIL 0x10 /* default is Q_AT_HEAD */
    20	#define BSG_FLAG_Q_AT_HEAD 0x20
    21	
    22	struct sg_io_v4 {
    23		__s32 guard;		/* [i] 'Q' to differentiate from v3 */
    24		__u32 protocol;		/* [i] 0 -> SCSI , .... */
    25		__u32 subprotocol;	/* [i] 0 -> SCSI command, 1 -> SCSI task
    26					   management function, .... */
    27	
    28		__u32 request_len;	/* [i] in bytes */
    29		__u64 request;		/* [i], [*i] {SCSI: cdb} */
    30		__u64 request_tag;	/* [i] {SCSI: task tag (only if flagged)} */
    31		__u32 request_attr;	/* [i] {SCSI: task attribute} */
    32		__u32 request_priority;	/* [i] {SCSI: task priority} */
    33		__u32 request_extra;	/* [i] {spare, for padding} */
    34		__u32 max_response_len;	/* [i] in bytes */
    35		__u64 response;		/* [i], [*o] {SCSI: (auto)sense data} */
    36	
    37	        /* "dout_": data out (to device); "din_": data in (from device) */
    38		__u32 dout_iovec_count;	/* [i] 0 -> "flat" dout transfer else
    39					   dout_xfer points to array of iovec */
    40		__u32 dout_xfer_len;	/* [i] bytes to be transferred to device */
    41		__u32 din_iovec_count;	/* [i] 0 -> "flat" din transfer */
    42		__u32 din_xfer_len;	/* [i] bytes to be transferred from device */
    43		__u64 dout_xferp;	/* [i], [*i] */
    44		__u64 din_xferp;	/* [i], [*o] */
    45	
    46		__u32 timeout;		/* [i] units: millisecond */
    47		__u32 flags;		/* [i] bit mask */
    48		__u64 usr_ptr;		/* [i->o] unused internally */
    49		__u32 spare_in;		/* [i] */
    50	
    51		__u32 driver_status;	/* [o] 0 -> ok */
    52		__u32 transport_status;	/* [o] 0 -> ok */
    53		__u32 device_status;	/* [o] {SCSI: command completion status} */
    54		__u32 retry_delay;	/* [o] {SCSI: status auxiliary information} */
    55		__u32 info;		/* [o] additional information */
    56		__u32 duration;		/* [o] time to complete, in milliseconds */
    57		__u32 response_len;	/* [o] bytes of response actually written */
    58		__s32 din_resid;	/* [o] din_xfer_len - actual_din_xfer_len */
    59		__s32 dout_resid;	/* [o] dout_xfer_len - actual_dout_xfer_len */
    60		__u64 generated_tag;	/* [o] {SCSI: transport generated task tag} */
    61		__u32 spare_out;	/* [o] */
    62	
    63		__u32 padding;
    64	};
    65	
    66	
    67	#endif /* BSG_H */