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| author | Hannes Reinecke <hare@suse.de> | 2009-05-18 16:41:30 +0400 |
|---|---|---|
| committer | Jens Axboe <jens.axboe@oracle.com> | 2009-05-18 16:41:30 +0400 |
| commit | 1cde26f928863d90e9e7c1217880c8450464d305 (patch) | |
| tree | e0f6e5157cccc8ab8b87b1192a1da6ddc6113e82 /include | |
| parent | 6c3b46f74587d46e71b8c2b78fdca626a3aca280 (diff) | |
| download | linux-1cde26f928863d90e9e7c1217880c8450464d305.tar.xz | |
virtio_blk: SG_IO passthru support
Add support for SG_IO passthru to virtio_blk. We add the scsi command
block after the normal outhdr, and the scsi inhdr with full status
information aswell as the sense buffer before the regular inhdr.
[hch: forward ported, added the VIRTIO_BLK_F_SCSI flags, some comments
and tested the whole beast]
[axboe: updated to use ->resid and not dual-path the byte count]
Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> (+ checkpatch.pl tweak)
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/virtio_blk.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/include/linux/virtio_blk.h b/include/linux/virtio_blk.h index 94c56d29869d..4dbcbc1c3481 100644 --- a/include/linux/virtio_blk.h +++ b/include/linux/virtio_blk.h @@ -15,6 +15,7 @@ #define VIRTIO_BLK_F_GEOMETRY 4 /* Legacy geometry available */ #define VIRTIO_BLK_F_RO 5 /* Disk is read-only */ #define VIRTIO_BLK_F_BLK_SIZE 6 /* Block size of disk is available*/ +#define VIRTIO_BLK_F_SCSI 7 /* Supports scsi command passthru */ struct virtio_blk_config { @@ -55,6 +56,13 @@ struct virtio_blk_outhdr __u64 sector; }; +struct virtio_scsi_inhdr { + __u32 errors; + __u32 data_len; + __u32 sense_len; + __u32 residual; +}; + /* And this is the final byte of the write scatter-gather list. */ #define VIRTIO_BLK_S_OK 0 #define VIRTIO_BLK_S_IOERR 1 |