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block: Make .bdrv_load_vmstate() vectored

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This brings it in line with .bdrv_save_vmstate().

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Fam Zheng <famz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Kevin Wolf 2016-06-09 16:50:16 +02:00
parent f1e8474115
commit 5ddda0b8f0
5 changed files with 36 additions and 13 deletions
Download patch file Download diff file Expand all files Collapse all files

25
block/io.c
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@ -1870,14 +1870,29 @@ int bdrv_writev_vmstate(BlockDriverState *bs, QEMUIOVector *qiov, int64_t pos)
int bdrv_load_vmstate(BlockDriverState *bs, uint8_t *buf,
int64_t pos, int size)
{
QEMUIOVector qiov;
struct iovec iov = {
.iov_base = buf,
.iov_len = size,
};
qemu_iovec_init_external(&qiov, &iov, 1);
return bdrv_readv_vmstate(bs, &qiov, pos);
}
int bdrv_readv_vmstate(BlockDriverState *bs, QEMUIOVector *qiov, int64_t pos)
{
BlockDriver *drv = bs->drv;
if (!drv)
if (!drv) {
return -ENOMEDIUM;
if (drv->bdrv_load_vmstate)
return drv->bdrv_load_vmstate(bs, buf, pos, size);
if (bs->file)
return bdrv_load_vmstate(bs->file->bs, buf, pos, size);
} else if (drv->bdrv_load_vmstate) {
return drv->bdrv_load_vmstate(bs, qiov, pos);
} else if (bs->file) {
return bdrv_readv_vmstate(bs->file->bs, qiov, pos);
}
return -ENOTSUP;
}