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block: Add error handling to bdrv_invalidate_cache()

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If it returns an error, the migrated VM will not be started, but qemu
exits with an error message.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Benoit Canet <benoit@irqsave.net>
This commit is contained in:
Kevin Wolf 2014-03-12 15:59:16 +01:00
parent 059b3527f0
commit 5a8a30db47
7 changed files with 76 additions and 18 deletions
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21
block/qed.c
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@ -1558,16 +1558,31 @@ static int bdrv_qed_change_backing_file(BlockDriverState *bs,
return ret;
}
static void bdrv_qed_invalidate_cache(BlockDriverState *bs)
static void bdrv_qed_invalidate_cache(BlockDriverState *bs, Error **errp)
{
BDRVQEDState *s = bs->opaque;
Error *local_err = NULL;
int ret;
bdrv_qed_close(bs);
bdrv_invalidate_cache(bs->file);
bdrv_invalidate_cache(bs->file, &local_err);
if (local_err) {
error_propagate(errp, local_err);
return;
}
memset(s, 0, sizeof(BDRVQEDState));
bdrv_qed_open(bs, NULL, bs->open_flags, NULL);
ret = bdrv_qed_open(bs, NULL, bs->open_flags, &local_err);
if (local_err) {
error_setg(errp, "Could not reopen qed layer: %s",
error_get_pretty(local_err));
error_free(local_err);
return;
} else if (ret < 0) {
error_setg_errno(errp, -ret, "Could not reopen qed layer");
return;
}
}
static int bdrv_qed_check(BlockDriverState *bs, BdrvCheckResult *result,