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blockdev-backup: Use bdrv_lookup_bs on target 

This allows backing up to a BDS that has not been attached to any BB.

Signed-off-by: Fam Zheng <famz@redhat.com>
Message-id: 1463969978-24970-2-git-send-email-famz@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Fam Zheng 2016-05-23 10:19:35 +08:00 committed by Stefan Hajnoczi
parent 271b385e7e
commit 0d97891312
1 changed files with 3 additions and 10 deletions
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13
blockdev.c
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@ -3335,7 +3335,7 @@ void do_blockdev_backup(const char *device, const char *target,
BlockdevOnError on_target_error,
BlockJobTxn *txn, Error **errp)
{
BlockBackend *blk, *target_blk;
BlockBackend *blk;
BlockDriverState *bs;
BlockDriverState *target_bs;
Error *local_err = NULL;
@ -3366,18 +3366,11 @@ void do_blockdev_backup(const char *device, const char *target,
}
bs = blk_bs(blk);
target_blk = blk_by_name(target);
if (!target_blk) {
error_setg(errp, "Device '%s' not found", target);
target_bs = bdrv_lookup_bs(target, target, errp);
if (!target_bs) {
goto out;
}
if (!blk_is_available(target_blk)) {
error_setg(errp, "Device '%s' has no medium", target);
goto out;
}
target_bs = blk_bs(target_blk);
bdrv_set_aio_context(target_bs, aio_context);
backup_start(bs, target_bs, speed, sync, NULL, on_source_error,
on_target_error, block_job_cb, bs, txn, &local_err);