diff options
| author | Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> | 2011-11-14 12:44:21 +0000 |
|---|---|---|
| committer | Kevin Wolf <kwolf@redhat.com> | 2011-12-05 14:51:37 +0100 |
| commit | f8a2e5e3ca6146d4cc66a4750daf44a0cf043319 (patch) | |
| tree | e7d9806736d64a850f539a774b0ac00f8bd900dc /block/qcow2.c | |
| parent | b7d5a5b8ae5425a4dee69b043b1f334237b3b06a (diff) | |
block: convert qcow2, qcow2, and vmdk to .bdrv_co_is_allocated()
The qcow2, qcow, and vmdk block drivers are based on coroutines. They have a
coroutine mutex which protects internal state. We can convert the
.bdrv_is_allocated() function to .bdrv_co_is_allocated() by holding the mutex
around the cluster lookup operation.
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'block/qcow2.c')
| -rw-r--r-- | block/qcow2.c | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/block/qcow2.c b/block/qcow2.c index 3f8a1281d7..5ac9fb4828 100644 --- a/block/qcow2.c +++ b/block/qcow2.c @@ -344,16 +344,19 @@ static int qcow2_set_key(BlockDriverState *bs, const char *key) return 0; } -static int qcow2_is_allocated(BlockDriverState *bs, int64_t sector_num, - int nb_sectors, int *pnum) +static int coroutine_fn qcow2_co_is_allocated(BlockDriverState *bs, + int64_t sector_num, int nb_sectors, int *pnum) { + BDRVQcowState *s = bs->opaque; uint64_t cluster_offset; int ret; *pnum = nb_sectors; - /* FIXME We can get errors here, but the bdrv_is_allocated interface can't - * pass them on today */ + /* FIXME We can get errors here, but the bdrv_co_is_allocated interface + * can't pass them on today */ + qemu_co_mutex_lock(&s->lock); ret = qcow2_get_cluster_offset(bs, sector_num << 9, pnum, &cluster_offset); + qemu_co_mutex_unlock(&s->lock); if (ret < 0) { *pnum = 0; } @@ -1277,7 +1280,7 @@ static BlockDriver bdrv_qcow2 = { .bdrv_open = qcow2_open, .bdrv_close = qcow2_close, .bdrv_create = qcow2_create, - .bdrv_is_allocated = qcow2_is_allocated, + .bdrv_co_is_allocated = qcow2_co_is_allocated, .bdrv_set_key = qcow2_set_key, .bdrv_make_empty = qcow2_make_empty, |