diff options
| author | Christoph Hellwig <hch@lst.de> | 2009-04-27 10:29:14 +0200 |
|---|---|---|
| committer | Anthony Liguori <aliguori@us.ibm.com> | 2009-05-01 09:44:10 -0500 |
| commit | 1063b8b15fb49fcf88ffa282b19aaaf7ca9c678c (patch) | |
| tree | 10b9005227477ddef237eaa79e68281b8f342772 /hw/virtio-blk.h | |
| parent | 451c4abd8c6a65106e14f8a9a9eacf70c4fa9727 (diff) | |
virtio-blk: add SGI_IO passthru support
[had the qemu list address wrong the first time, reply to this message,
not the previous if you were on Cc]
Add support for SG_IO passthru (packet commands) to the virtio-blk
backend. Conceptually based on an older patch from Hannes Reinecke
but largely rewritten to match the code structure and layering in
virtio-blk.
Note that currently we issue the hose SG_IO synchronously. We could
easily switch to async I/O, but that would required either bloating
the VirtIOBlockReq by the size of struct sg_io_hdr or an additional
memory allocation for each SG_IO request.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Diffstat (limited to 'hw/virtio-blk.h')
| -rw-r--r-- | hw/virtio-blk.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/hw/virtio-blk.h b/hw/virtio-blk.h index 8c91e1ece..d11f48494 100644 --- a/hw/virtio-blk.h +++ b/hw/virtio-blk.h @@ -28,6 +28,9 @@ #define VIRTIO_BLK_F_SIZE_MAX 1 /* Indicates maximum segment size */ #define VIRTIO_BLK_F_SEG_MAX 2 /* Indicates maximum # of segments */ #define VIRTIO_BLK_F_GEOMETRY 4 /* Indicates support of legacy geometry */ +#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 { @@ -70,6 +73,15 @@ struct virtio_blk_inhdr unsigned char status; }; +/* SCSI pass-through header */ +struct virtio_scsi_inhdr +{ + uint32_t errors; + uint32_t data_len; + uint32_t sense_len; + uint32_t residual; +}; + void *virtio_blk_init(PCIBus *bus, BlockDriverState *bs); #endif |