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| 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/qcow.c | |
| parent | b7d5a5b8ae5425a4dee69b043b1f334237b3b06a (diff) | |
| download | qemu-f8a2e5e3ca6146d4cc66a4750daf44a0cf043319.tar.gz qemu-f8a2e5e3ca6146d4cc66a4750daf44a0cf043319.tar.bz2 qemu-f8a2e5e3ca6146d4cc66a4750daf44a0cf043319.zip | |
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/qcow.c')
| -rw-r--r-- | block/qcow.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/block/qcow.c b/block/qcow.c index 326ef878e6..b16955d764 100644 --- a/block/qcow.c +++ b/block/qcow.c @@ -368,14 +368,16 @@ static uint64_t get_cluster_offset(BlockDriverState *bs, return cluster_offset; } -static int qcow_is_allocated(BlockDriverState *bs, int64_t sector_num, - int nb_sectors, int *pnum) +static int coroutine_fn qcow_co_is_allocated(BlockDriverState *bs, + int64_t sector_num, int nb_sectors, int *pnum) { BDRVQcowState *s = bs->opaque; int index_in_cluster, n; uint64_t cluster_offset; + qemu_co_mutex_lock(&s->lock); cluster_offset = get_cluster_offset(bs, sector_num << 9, 0, 0, 0, 0); + qemu_co_mutex_unlock(&s->lock); index_in_cluster = sector_num & (s->cluster_sectors - 1); n = s->cluster_sectors - index_in_cluster; if (n > nb_sectors) @@ -844,7 +846,7 @@ static BlockDriver bdrv_qcow = { .bdrv_co_readv = qcow_co_readv, .bdrv_co_writev = qcow_co_writev, .bdrv_co_flush_to_disk = qcow_co_flush, - .bdrv_is_allocated = qcow_is_allocated, + .bdrv_co_is_allocated = qcow_co_is_allocated, .bdrv_set_key = qcow_set_key, .bdrv_make_empty = qcow_make_empty, |