From: Andrey Shinkevich <andrey.shinkev...@virtuozzo.com>
On a file system used by the customer, fallocate() returns an error
if the block is not properly aligned. So, bdrv_co_pwrite_zeroes()
fails. We can handle that case the same way as it is done for the
unsupported cases, namely, call to bdrv_driver_pwritev() that writes
zeroes to an image for the unaligned chunk of the block.
Suggested-by: Denis V. Lunev <d...@openvz.org>
Signed-off-by: Andrey Shinkevich <andrey.shinkev...@virtuozzo.com>
Reviewed-by: John Snow <js...@redhat.com>
Message-id: 1554474244-553661-1-git-send-email-andrey.shinkev...@virtuozzo.com
Message-Id: <1554474244-553661-1-git-send-email-andrey.shinkev...@virtuozzo.com>
Signed-off-by: Stefan Hajnoczi <stefa...@redhat.com>
---
block/io.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/block/io.c b/block/io.c
index dfc153b8d8..0412a51314 100644
--- a/block/io.c
+++ b/block/io.c
@@ -1516,7 +1516,7 @@ static int coroutine_fn
bdrv_co_do_pwrite_zeroes(BlockDriverState *bs,
assert(!bs->supported_zero_flags);
}
- if (ret == -ENOTSUP && !(flags & BDRV_REQ_NO_FALLBACK)) {
+ if (ret < 0 && !(flags & BDRV_REQ_NO_FALLBACK)) {
/* Fall back to bounce buffer if write zeroes is unsupported */
BdrvRequestFlags write_flags = flags & ~BDRV_REQ_ZERO_WRITE;
--
2.21.0
