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blockdev: drop redundant proto_drv check

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It is not necessary to check that we can find a protocol block driver
since we create or open the image file.  This produces the error that we
need anyway.

Besides, the QERR_INVALID_BLOCK_FORMAT is inappropriate since the
protocol is incorrect rather than the format.

Also drop an empty line between bdrv_open() and checking its return
value.  This may be due to copy-pasting from earlier code that performed
other operations before handling errors.

Reported-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Wenchao Xia <xiawenc@linux.vnet.ibm.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Stefan Hajnoczi 2013-06-24 17:13:12 +02:00 committed by Kevin Wolf
parent 98d2c6f2cd
commit cb78466ef6
1 changed files with 0 additions and 15 deletions
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15
blockdev.c
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@ -818,7 +818,6 @@ typedef struct ExternalSnapshotStates {
static void external_snapshot_prepare(BlkTransactionStates *common,
Error **errp)
{
BlockDriver *proto_drv;
BlockDriver *drv;
int flags, ret;
Error *local_err = NULL;
@ -874,12 +873,6 @@ static void external_snapshot_prepare(BlkTransactionStates *common,
flags = states->old_bs->open_flags;
proto_drv = bdrv_find_protocol(new_image_file);
if (!proto_drv) {
error_set(errp, QERR_INVALID_BLOCK_FORMAT, format);
return;
}
/* create new image w/backing file */
if (mode != NEW_IMAGE_MODE_EXISTING) {
bdrv_img_create(new_image_file, format,
@ -1375,7 +1368,6 @@ void qmp_drive_mirror(const char *device, const char *target,
{
BlockDriverState *bs;
BlockDriverState *source, *target_bs;
BlockDriver *proto_drv;
BlockDriver *drv = NULL;
Error *local_err = NULL;
int flags;
@ -1443,12 +1435,6 @@ void qmp_drive_mirror(const char *device, const char *target,
sync = MIRROR_SYNC_MODE_FULL;
}
proto_drv = bdrv_find_protocol(target);
if (!proto_drv) {
error_set(errp, QERR_INVALID_BLOCK_FORMAT, format);
return;
}
bdrv_get_geometry(bs, &size);
size *= 512;
if (sync == MIRROR_SYNC_MODE_FULL && mode != NEW_IMAGE_MODE_EXISTING) {
@ -1483,7 +1469,6 @@ void qmp_drive_mirror(const char *device, const char *target,
*/
target_bs = bdrv_new("");
ret = bdrv_open(target_bs, target, NULL, flags | BDRV_O_NO_BACKING, drv);
if (ret < 0) {
bdrv_delete(target_bs);
error_setg_file_open(errp, -ret, target);