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block: Introduce bdrv_writev_vmstate

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Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Kevin Wolf
2013-04-05 21:27:53 +02:00
committed by Stefan Hajnoczi
parent e2ec3f9768
commit cf8074b382
5 changed files with 42 additions and 13 deletions
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25
block.c
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@@ -3183,14 +3183,29 @@ int bdrv_get_info(BlockDriverState *bs, BlockDriverInfo *bdi)
int bdrv_save_vmstate(BlockDriverState *bs, const uint8_t *buf,
int64_t pos, int size)
{
QEMUIOVector qiov;
struct iovec iov = {
.iov_base = (void *) buf,
.iov_len = size,
};
qemu_iovec_init_external(&qiov, &iov, 1);
return bdrv_writev_vmstate(bs, &qiov, pos);
}
int bdrv_writev_vmstate(BlockDriverState *bs, QEMUIOVector *qiov, int64_t pos)
{
BlockDriver *drv = bs->drv;
if (!drv)
if (!drv) {
return -ENOMEDIUM;
if (drv->bdrv_save_vmstate)
return drv->bdrv_save_vmstate(bs, buf, pos, size);
if (bs->file)
return bdrv_save_vmstate(bs->file, buf, pos, size);
} else if (drv->bdrv_save_vmstate) {
return drv->bdrv_save_vmstate(bs, qiov, pos);
} else if (bs->file) {
return bdrv_writev_vmstate(bs->file, qiov, pos);
}
return -ENOTSUP;
}