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rbd: call flush, if available 

librbd recently added async writeback and flush support.  If the new
rbd_flush() call is available, call it.

Signed-off-by: Sage Weil <sage@newdream.net>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
master
Sage Weil 2011-09-15 14:11:11 -07:00 committed by Kevin Wolf
parent 9e1fbcde57
commit 7a3f5fe9af
1 changed files with 12 additions and 0 deletions
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12
block/rbd.c
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@ -680,6 +680,17 @@ static BlockDriverAIOCB *qemu_rbd_aio_writev(BlockDriverState *bs,
return rbd_aio_rw_vector(bs, sector_num, qiov, nb_sectors, cb, opaque, 1);
}
static int qemu_rbd_flush(BlockDriverState *bs)
{
#if LIBRBD_VERSION_CODE >= LIBRBD_VERSION(0, 1, 1)
/* rbd_flush added in 0.1.1 */
BDRVRBDState *s = bs->opaque;
return rbd_flush(s->image);
#else
return 0;
#endif
}
static int qemu_rbd_getinfo(BlockDriverState *bs, BlockDriverInfo *bdi)
{
BDRVRBDState *s = bs->opaque;
@ -815,6 +826,7 @@ static BlockDriver bdrv_rbd = {
.bdrv_file_open = qemu_rbd_open,
.bdrv_close = qemu_rbd_close,
.bdrv_create = qemu_rbd_create,
.bdrv_flush = qemu_rbd_flush,
.bdrv_get_info = qemu_rbd_getinfo,
.create_options = qemu_rbd_create_options,
.bdrv_getlength = qemu_rbd_getlength,