diff options
| author | Paolo Bonzini <pbonzini@redhat.com> | 2011-10-20 13:16:25 +0200 |
|---|---|---|
| committer | Kevin Wolf <kwolf@redhat.com> | 2011-10-21 17:34:14 +0200 |
| commit | 6db39ae2e250f15da17462444ea18a9fcef41e05 (patch) | |
| tree | 5589abb302dd9261348c7e67ca9a5eb2f89a14d5 /block/qcow2.c | |
| parent | 8b94ff85737062876c03e7506abb500521c749b9 (diff) | |
block: change discard to co_discard
Since coroutine operation is now mandatory, convert both bdrv_discard
implementations to coroutines. For qcow2, this means taking the lock
around the operation. raw-posix remains synchronous.
The bdrv_discard callback is then unused and can be eliminated.
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'block/qcow2.c')
| -rw-r--r-- | block/qcow2.c | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/block/qcow2.c b/block/qcow2.c index 6ef38bf1b..a181932b6 100644 --- a/block/qcow2.c +++ b/block/qcow2.c @@ -978,11 +978,17 @@ static int qcow2_make_empty(BlockDriverState *bs) return 0; } -static int qcow2_discard(BlockDriverState *bs, int64_t sector_num, - int nb_sectors) +static coroutine_fn int qcow2_co_discard(BlockDriverState *bs, + int64_t sector_num, int nb_sectors) { - return qcow2_discard_clusters(bs, sector_num << BDRV_SECTOR_BITS, + int ret; + BDRVQcowState *s = bs->opaque; + + qemu_co_mutex_lock(&s->lock); + ret = qcow2_discard_clusters(bs, sector_num << BDRV_SECTOR_BITS, nb_sectors); + qemu_co_mutex_unlock(&s->lock); + return ret; } static int qcow2_truncate(BlockDriverState *bs, int64_t offset) @@ -1239,7 +1245,7 @@ static BlockDriver bdrv_qcow2 = { .bdrv_co_writev = qcow2_co_writev, .bdrv_co_flush = qcow2_co_flush, - .bdrv_discard = qcow2_discard, + .bdrv_co_discard = qcow2_co_discard, .bdrv_truncate = qcow2_truncate, .bdrv_write_compressed = qcow2_write_compressed, |