bdrv_co_do_pwrite_zeroes() can already cope with maximum request sizes
by calling the driver in a loop until everything is done. Make the small
remaining change that is necessary to let it accept a 64 bit byte count.
Signed-off-by: Kevin Wolf <kw...@redhat.com>
Reviewed-by: Eric Blake <ebl...@redhat.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsement...@virtuozzo.com>
Reviewed-by: Alberto Garcia <be...@igalia.com>
---
block/io.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/block/io.c b/block/io.c
index f75777f5ea..003f4ea38c 100644
--- a/block/io.c
+++ b/block/io.c
@@ -42,7 +42,7 @@
static void bdrv_parent_cb_resize(BlockDriverState *bs);
static int coroutine_fn bdrv_co_do_pwrite_zeroes(BlockDriverState *bs,
- int64_t offset, int bytes, BdrvRequestFlags flags);
+ int64_t offset, int64_t bytes, BdrvRequestFlags flags);
static void bdrv_parent_drained_begin(BlockDriverState *bs, BdrvChild *ignore,
bool ignore_bds_parents)
@@ -1730,7 +1730,7 @@ int coroutine_fn bdrv_co_preadv_part(BdrvChild *child,
}
static int coroutine_fn bdrv_co_do_pwrite_zeroes(BlockDriverState *bs,
- int64_t offset, int bytes, BdrvRequestFlags flags)
+ int64_t offset, int64_t bytes, BdrvRequestFlags flags)
{
BlockDriver *drv = bs->drv;
QEMUIOVector qiov;
@@ -1760,7 +1760,7 @@ static int coroutine_fn
bdrv_co_do_pwrite_zeroes(BlockDriverState *bs,
assert(max_write_zeroes >= bs->bl.request_alignment);
while (bytes > 0 && !ret) {
- int num = bytes;
+ int num = MIN(bytes, BDRV_REQUEST_MAX_BYTES);
/* Align request. Block drivers can expect the "bulk" of the request
* to be aligned, and that unaligned requests do not cross cluster
--
2.20.1
