diff options
| author | aliguori <aliguori@c046a42c-6fe2-441c-8c8c-71466251a162> | 2009-03-12 19:57:08 +0000 |
|---|---|---|
| committer | aliguori <aliguori@c046a42c-6fe2-441c-8c8c-71466251a162> | 2009-03-12 19:57:08 +0000 |
| commit | 7d78066926b68afe28a1948c64618ee085d9ab02 (patch) | |
| tree | 8a29ece82d1a77db49c8679502641eb2f6b9079c /block.h | |
| parent | 943984c7a508a2d76029e8065b2c2564d279892f (diff) | |
Add specialized block driver scsi generic API (Avi Kivity)
When a scsi device is backed by a scsi generic device instead of an
ordinary host block device, the block API is abused in a couple of annoying
ways:
- nb_sectors is negative, and specifies a byte count instead of a sector count
- offset is ignored, since scsi-generic is essentially a packet protocol
This overloading makes hacking the block layer difficult. Remove it by
introducing a new explicit API for scsi-generic devices. The new API
is still backed by the old implementation, but at least the users are
insulated.
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6822 c046a42c-6fe2-441c-8c8c-71466251a162
Diffstat (limited to 'block.h')
| -rw-r--r-- | block.h | 8 |
1 files changed, 8 insertions, 0 deletions
@@ -101,6 +101,14 @@ BlockDriverAIOCB *bdrv_aio_write(BlockDriverState *bs, int64_t sector_num, BlockDriverCompletionFunc *cb, void *opaque); void bdrv_aio_cancel(BlockDriverAIOCB *acb); +/* sg packet commands */ +int bdrv_sg_send_command(BlockDriverState *bs, void *buf, int count); +int bdrv_sg_recv_response(BlockDriverState *bs, void *buf, int count); +BlockDriverAIOCB *bdrv_sg_aio_read(BlockDriverState *bs, void *buf, int count, + BlockDriverCompletionFunc *cb, void *opaque); +BlockDriverAIOCB *bdrv_sg_aio_write(BlockDriverState *bs, void *buf, int count, + BlockDriverCompletionFunc *cb, void *opaque); + /* Ensure contents are flushed to disk. */ void bdrv_flush(BlockDriverState *bs); void bdrv_flush_all(void); |