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authorEric Blake <eblake@redhat.com>2018-06-28 15:15:18 -0500
committerKevin Wolf <kwolf@redhat.com>2018-06-29 14:20:56 +0200
commitd08c2a245feb6ab82b5a044f72c75964eedeaef5 (patch)
tree7a2d71da2d30f8059e3e3590c7d7618b562478d7
parentc436e3d0145a3952aacf1a4014434b82d7157633 (diff)
parallels: Switch to byte-based calls
We are gradually moving away from sector-based interfaces, towards byte-based. Make the change for the last few sector-based calls into the block layer from the parallels driver. Ideally, the parallels driver should switch to doing everything byte-based, but that's a more invasive change that requires a bit more auditing. Signed-off-by: Eric Blake <eblake@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Denis V. Lunev <den@openvz.org> Reviewed-by: Jeff Cody <jcody@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
-rw-r--r--block/parallels.c16
1 files changed, 10 insertions, 6 deletions
diff --git a/block/parallels.c b/block/parallels.c
index fd215e202a..cc9445879d 100644
--- a/block/parallels.c
+++ b/block/parallels.c
@@ -227,14 +227,15 @@ static int64_t allocate_clusters(BlockDriverState *bs, int64_t sector_num,
};
qemu_iovec_init_external(&qiov, &iov, 1);
- ret = bdrv_co_readv(bs->backing, idx * s->tracks, nb_cow_sectors,
- &qiov);
+ ret = bdrv_co_preadv(bs->backing, idx * s->tracks * BDRV_SECTOR_SIZE,
+ nb_cow_bytes, &qiov, 0);
if (ret < 0) {
qemu_vfree(iov.iov_base);
return ret;
}
- ret = bdrv_co_writev(bs->file, s->data_end, nb_cow_sectors, &qiov);
+ ret = bdrv_co_pwritev(bs->file, s->data_end * BDRV_SECTOR_SIZE,
+ nb_cow_bytes, &qiov, 0);
qemu_vfree(iov.iov_base);
if (ret < 0) {
return ret;
@@ -340,7 +341,8 @@ static coroutine_fn int parallels_co_writev(BlockDriverState *bs,
qemu_iovec_reset(&hd_qiov);
qemu_iovec_concat(&hd_qiov, qiov, bytes_done, nbytes);
- ret = bdrv_co_writev(bs->file, position, n, &hd_qiov);
+ ret = bdrv_co_pwritev(bs->file, position * BDRV_SECTOR_SIZE, nbytes,
+ &hd_qiov, 0);
if (ret < 0) {
break;
}
@@ -379,7 +381,8 @@ static coroutine_fn int parallels_co_readv(BlockDriverState *bs,
if (position < 0) {
if (bs->backing) {
- ret = bdrv_co_readv(bs->backing, sector_num, n, &hd_qiov);
+ ret = bdrv_co_preadv(bs->backing, sector_num * BDRV_SECTOR_SIZE,
+ nbytes, &hd_qiov, 0);
if (ret < 0) {
break;
}
@@ -387,7 +390,8 @@ static coroutine_fn int parallels_co_readv(BlockDriverState *bs,
qemu_iovec_memset(&hd_qiov, 0, 0, nbytes);
}
} else {
- ret = bdrv_co_readv(bs->file, position, n, &hd_qiov);
+ ret = bdrv_co_preadv(bs->file, position * BDRV_SECTOR_SIZE, nbytes,
+ &hd_qiov, 0);
if (ret < 0) {
break;
}