On 9/15/23 20:41, Denis V. Lunev wrote:
The zero flag is missed in the Parallels format specification. We can resort to discard if we have no backing file.Signed-off-by: Denis V. Lunev <d...@openvz.org> --- block/parallels.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/block/parallels.c b/block/parallels.c index 83cb8d6722..a098e2cbc2 100644 --- a/block/parallels.c +++ b/block/parallels.c @@ -583,6 +583,19 @@ done: return ret; }+static int coroutine_fn GRAPH_RDLOCK+parallels_co_pwrite_zeroes(BlockDriverState *bs, int64_t offset, int64_t bytes, + BdrvRequestFlags flags) +{ + /* + * The zero flag is missed in the Parallels format specification. We can + * resort to discard if we have no backing file (this condition is checked + * inside parallels_co_pdiscard(). + */ + return parallels_co_pdiscard(bs, offset, bytes); +} + + static void parallels_check_unclean(BlockDriverState *bs, BdrvCheckResult *res, BdrvCheckMode fix) @@ -1456,6 +1469,7 @@ static BlockDriver bdrv_parallels = { .bdrv_co_create_opts = parallels_co_create_opts, .bdrv_co_check = parallels_co_check, .bdrv_co_pdiscard = parallels_co_pdiscard, + .bdrv_co_pwrite_zeroes = parallels_co_pwrite_zeroes, };static void bdrv_parallels_init(void)
Reviewed-by: Alexander Ivanov <alexander.iva...@virtuozzo.com> -- Best regards, Alexander Ivanov
