Add internal scsi generic block API (Avi Kivity)

Add an internal API for the generic block layer to send scsi generic commands
to block format driver.  This means block format drivers no longer need
to consider overloaded nb_sectors parameters.

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@6823 c046a42c-6fe2-441c-8c8c-71466251a162

1 files changed, 30 insertions, 0 deletions

diff --git a/block-raw-posix.c b/block-raw-posix.c
index 8b28a43c50..a2ac48a068 100644
--- a/block-raw-posix.c
+++ b/block-raw-posix.c
@@ -1179,6 +1179,32 @@ static int raw_ioctl(BlockDriverState *bs, unsigned long int req, void *buf)
 }
 #endif /* !linux */
 
+static int raw_sg_send_command(BlockDriverState *bs, void *buf, int count)
+{
+    return raw_pwrite(bs, -1, buf, count);
+}
+
+static int raw_sg_recv_response(BlockDriverState *bs, void *buf, int count)
+{
+    return raw_pread(bs, -1, buf, count);
+}
+
+static BlockDriverAIOCB *raw_sg_aio_read(BlockDriverState *bs,
+                                         void *buf, int count,
+                                         BlockDriverCompletionFunc *cb,
+                                         void *opaque)
+{
+    return raw_aio_read(bs, 0, buf, -(int64_t)count, cb, opaque);
+}
+
+static BlockDriverAIOCB *raw_sg_aio_write(BlockDriverState *bs,
+                                          void *buf, int count,
+                                          BlockDriverCompletionFunc *cb,
+                                          void *opaque)
+{
+    return raw_aio_write(bs, 0, buf, -(int64_t)count, cb, opaque);
+}
+
 BlockDriver bdrv_host_device = {
     .format_name	= "host_device",
     .instance_size	= sizeof(BDRVRawState),
@@ -1204,4 +1230,8 @@ BlockDriver bdrv_host_device = {
     .bdrv_set_locked	= raw_set_locked,
     /* generic scsi device */
     .bdrv_ioctl		= raw_ioctl,
+    .bdrv_sg_send_command  = raw_sg_send_command,
+    .bdrv_sg_recv_response = raw_sg_recv_response,
+    .bdrv_sg_aio_read      = raw_sg_aio_read,
+    .bdrv_sg_aio_write     = raw_sg_aio_write,
 };