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qcow2: Clear L2 table cache after write error
author
Kevin Wolf
<kwolf@redhat.com>
Tue, 13 Apr 2010 09:43:27 +0000
(11:43 +0200)
committer
Kevin Wolf
<kwolf@redhat.com>
Fri, 28 May 2010 11:14:25 +0000
(13:14 +0200)
If the L2 table was already updated in cache, but writing it to disk has
failed, we must not continue using the changed version in the cache to stay
consistent with what's on the disk.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
block/qcow2-cluster.c
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diff --git
a/block/qcow2-cluster.c
b/block/qcow2-cluster.c
index
c11680d
..
ed5c4b2
100644
(file)
--- a/
block/qcow2-cluster.c
+++ b/
block/qcow2-cluster.c
@@
-696,6
+696,7
@@
int qcow2_alloc_cluster_link_l2(BlockDriverState *bs, QCowL2Meta *m)
ret = write_l2_entries(bs, l2_table, l2_offset, l2_index, m->nb_clusters);
if (ret < 0) {
+ qcow2_l2_cache_reset(bs);
goto err;
}