lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

virtio_blk: SG_IO passthru support

Browse Source 
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>
This commit is contained in:
Hannes Reinecke
2009-05-18 14:41:30 +02:00
committed by Jens Axboe
parent 6c3b46f745
commit 1cde26f928
2 changed files with 58 additions and 14 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
include/linux/virtio_blk.h
View File

@@ -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