@@ -604,4 +604,6 @@ bool bdrv_can_store_new_dirty_bitmap(BlockDriverState *bs, const char *name,
*/
void bdrv_register_buf(BlockDriverState *bs, void *host, size_t size);
void bdrv_unregister_buf(BlockDriverState *bs, void *host);
+
+int bdrv_reconnect(BlockDriverState *bs, Error **errp);
#endif
@@ -475,6 +475,9 @@ struct BlockDriver {
*/
void (*bdrv_register_buf)(BlockDriverState *bs, void *host, size_t size);
void (*bdrv_unregister_buf)(BlockDriverState *bs, void *host);
+
+ int (*bdrv_reconnect)(BlockDriverState *bs, Error **errp);
+
QLIST_ENTRY(BlockDriver) list;
};
@@ -4095,6 +4095,28 @@ int bdrv_has_zero_init(BlockDriverState *bs)
return 0;
}
+int bdrv_reconnect(BlockDriverState *bs, Error **errp)
+{
+ int ret;
+
+ if (bs->drv && bs->drv->bdrv_reconnect) {
+ return bs->drv->bdrv_reconnect(bs, errp);
+ }
+
+ if (bs->backing) {
+ ret = bdrv_reconnect(bs->backing->bs, errp);
+ if (ret < 0) {
+ return ret;
+ }
+ }
+
+ if (bs->file) {
+ return bdrv_reconnect(bs->file->bs, errp);
+ }
+
+ return 0;
+}
+
bool bdrv_unallocated_blocks_are_zero(BlockDriverState *bs)
{
BlockDriverInfo bdi;
It will be used to reconnect NBD connection. Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> --- include/block/block.h | 2 ++ include/block/block_int.h | 3 +++ block.c | 22 ++++++++++++++++++++++ 3 files changed, 27 insertions(+)