diff options
| author | Zhi Yong Wu <wuzhy@linux.vnet.ibm.com> | 2012-05-07 16:51:03 +0800 |
|---|---|---|
| committer | Kevin Wolf <kwolf@redhat.com> | 2012-05-07 19:33:18 +0200 |
| commit | 15552c4ad38b9ec66792b044cf5ae74538c32717 (patch) | |
| tree | b168541511421906bc1214b8408cd7175ca486d5 /block/qcow2.c | |
| parent | 5b7e1542cfa41a281af9629d31cef03704d976e6 (diff) | |
| download | qemu-15552c4ad38b9ec66792b044cf5ae74538c32717.tar.gz qemu-15552c4ad38b9ec66792b044cf5ae74538c32717.tar.bz2 qemu-15552c4ad38b9ec66792b044cf5ae74538c32717.zip | |
qcow2: lock on prealloc
preallocate() will be locked. This is required because
qcow2_alloc_cluster_link_l2() assumes that it runs under a lock that it
can drop while COW is being performed.
Signed-off-by: Zhi Yong Wu <wuzhy@linux.vnet.ibm.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'block/qcow2.c')
| -rw-r--r-- | block/qcow2.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/block/qcow2.c b/block/qcow2.c index 8c60a6f061..ee4678f6ed 100644 --- a/block/qcow2.c +++ b/block/qcow2.c @@ -1192,7 +1192,10 @@ static int qcow2_create2(const char *filename, int64_t total_size, /* And if we're supposed to preallocate metadata, do that now */ if (prealloc) { + BDRVQcowState *s = bs->opaque; + qemu_co_mutex_lock(&s->lock); ret = preallocate(bs); + qemu_co_mutex_unlock(&s->lock); if (ret < 0) { goto out; } |