diff options
| author | Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> | 2021-09-03 13:28:04 +0300 |
|---|---|---|
| committer | Eric Blake <eblake@redhat.com> | 2021-09-29 13:46:32 -0500 |
| commit | 2aaa3f9b33afca9733700b94d764e45ac009b8e5 (patch) | |
| tree | b3ad4561eb0fb0553bb8668059b2fed226db4ba1 /block | |
| parent | f34b2bcf8c393929c7d2100eb2f3909cac0d1cab (diff) | |
block/io: allow 64bit write-zeroes requests
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 <vsementsov@virtuozzo.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <20210903102807.27127-9-vsementsov@virtuozzo.com>
Signed-off-by: Eric Blake <eblake@redhat.com>
Diffstat (limited to 'block')
| -rw-r--r-- | block/io.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/block/io.c b/block/io.c index 0090224603..e40462742e 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); @@ -2248,7 +2249,11 @@ 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; } |