Now that all drivers are updated by previous commit, we can drop two last limiters on write-zeroes path: INT_MAX in bdrv_co_do_pwrite_zeroes() and bdrv_check_request32() in bdrv_co_pwritev_part().
Now everything is prepared for implementing incredibly cool and fast big-write-zeroes in NBD and qcow2. And any other driver which wants it of course. Signed-off-by: Vladimir Sementsov-Ogievskiy <vsement...@virtuozzo.com> Reviewed-by: Eric Blake <ebl...@redhat.com> --- block/io.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/block/io.c b/block/io.c index b4dce946bd..c386cd700e 100644 --- a/block/io.c +++ b/block/io.c @@ -1869,7 +1869,8 @@ static int coroutine_fn bdrv_co_do_pwrite_zeroes(BlockDriverState *bs, int head = 0; int tail = 0; - int64_t max_write_zeroes = MIN_NON_ZERO(bs->bl.max_pwrite_zeroes, INT_MAX); + int64_t max_write_zeroes = MIN_NON_ZERO(bs->bl.max_pwrite_zeroes, + INT64_MAX); int alignment = MAX(bs->bl.pwrite_zeroes_alignment, bs->bl.request_alignment); int max_transfer = MIN_NON_ZERO(bs->bl.max_transfer, MAX_BOUNCE_BUFFER); @@ -2245,7 +2246,11 @@ int coroutine_fn bdrv_co_pwritev_part(BdrvChild *child, return -ENOMEDIUM; } - ret = bdrv_check_request32(offset, bytes, qiov, qiov_offset); + if (flags & BDRV_REQ_ZERO_WRITE) { + ret = bdrv_check_qiov_request(offset, bytes, qiov, qiov_offset, NULL); + } else { + ret = bdrv_check_request32(offset, bytes, qiov, qiov_offset); + } if (ret < 0) { return ret; } -- 2.29.2