Implement bdrv_zero_init using posix_fallocate.
Signed-off-by: Hu Tao <hu...@cn.fujitsu.com>
---
block/raw-posix.c | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/block/raw-posix.c b/block/raw-posix.c
index f6d48bb..8798599 100644
--- a/block/raw-posix.c
+++ b/block/raw-posix.c
@@ -1190,6 +1190,18 @@ static int64_t coroutine_fn
raw_co_get_block_status(BlockDriverState *bs,
return ret;
}
+static int raw_zero_init(BlockDriverState *bs, int64_t offset, int64_t length)
+{
+ BDRVRawState *s = bs->opaque;
+ int64_t len = bdrv_getlength(bs);
+
+ if (offset + length < 0 || offset + length > len) {
+ return -1;
+ }
+
+ return posix_fallocate(s->fd, offset, length);
+}
+
static coroutine_fn BlockDriverAIOCB *raw_aio_discard(BlockDriverState *bs,
int64_t sector_num, int nb_sectors,
BlockDriverCompletionFunc *cb, void *opaque)
@@ -1222,6 +1234,7 @@ static BlockDriver bdrv_file = {
.bdrv_close = raw_close,
.bdrv_create = raw_create,
.bdrv_has_zero_init = bdrv_has_zero_init_1,
+ .bdrv_zero_init = raw_zero_init,
.bdrv_co_get_block_status = raw_co_get_block_status,
.bdrv_aio_readv = raw_aio_readv,
--
1.8.3.1
