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[PULL 02/20] block/io: bring request check to bdrv_co_(read, write)v_vms
From: |
Eric Blake |
Subject: |
[PULL 02/20] block/io: bring request check to bdrv_co_(read, write)v_vmstate |
Date: |
Mon, 27 Sep 2021 16:55:27 -0500 |
From: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Only qcow2 driver supports vmstate.
In qcow2 these requests go through .bdrv_co_p{read,write}v_part
handlers.
So, let's do our basic check for the request on vmstate generic
handlers.
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <20210903102807.27127-2-vsementsov@virtuozzo.com>
Signed-off-by: Eric Blake <eblake@redhat.com>
---
block/io.c | 18 ++++++++++++++++--
1 file changed, 16 insertions(+), 2 deletions(-)
diff --git a/block/io.c b/block/io.c
index 99ee182ca449..58602f84dbf0 100644
--- a/block/io.c
+++ b/block/io.c
@@ -2810,7 +2810,12 @@ bdrv_co_readv_vmstate(BlockDriverState *bs, QEMUIOVector
*qiov, int64_t pos)
{
BlockDriver *drv = bs->drv;
BlockDriverState *child_bs = bdrv_primary_bs(bs);
- int ret = -ENOTSUP;
+ int ret;
+
+ ret = bdrv_check_qiov_request(pos, qiov->size, qiov, 0, NULL);
+ if (ret < 0) {
+ return ret;
+ }
if (!drv) {
return -ENOMEDIUM;
@@ -2822,6 +2827,8 @@ bdrv_co_readv_vmstate(BlockDriverState *bs, QEMUIOVector
*qiov, int64_t pos)
ret = drv->bdrv_load_vmstate(bs, qiov, pos);
} else if (child_bs) {
ret = bdrv_co_readv_vmstate(child_bs, qiov, pos);
+ } else {
+ ret = -ENOTSUP;
}
bdrv_dec_in_flight(bs);
@@ -2834,7 +2841,12 @@ bdrv_co_writev_vmstate(BlockDriverState *bs,
QEMUIOVector *qiov, int64_t pos)
{
BlockDriver *drv = bs->drv;
BlockDriverState *child_bs = bdrv_primary_bs(bs);
- int ret = -ENOTSUP;
+ int ret;
+
+ ret = bdrv_check_qiov_request(pos, qiov->size, qiov, 0, NULL);
+ if (ret < 0) {
+ return ret;
+ }
if (!drv) {
return -ENOMEDIUM;
@@ -2846,6 +2858,8 @@ bdrv_co_writev_vmstate(BlockDriverState *bs, QEMUIOVector
*qiov, int64_t pos)
ret = drv->bdrv_save_vmstate(bs, qiov, pos);
} else if (child_bs) {
ret = bdrv_co_writev_vmstate(child_bs, qiov, pos);
+ } else {
+ ret = -ENOTSUP;
}
bdrv_dec_in_flight(bs);
--
2.31.1
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