commit f6186f49e2c98d91f22027d8c62996df4fcf3f92
author Benoît Canet <benoit@irqsave.net> Wed Oct 02 14:33:48 2013 +0200
committer Kevin Wolf <kwolf@redhat.com> Fri Oct 11 16:49:59 2013 +0200
tree eb831f18393107e9014f1bbf91931d21427afd84
parent 92bc50a5ad7fbc9a0bd17240eaea5027a100ca79

block: Add BlockDriver.bdrv_check_ext_snapshot.

This field is used by blkverify to disable external snapshots creation.
It will also be used by block filters like quorum to disable external
snapshot creation.

Signed-off-by: Benoit Canet <benoit@irqsave.net>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>

block.c

diff --git a/block.c b/block.c
index d86efad..beea027 100644
--- a/block.c
+++ b/block.c
@@ -4647,3 +4647,22 @@
     }
     return bs->drv->bdrv_amend_options(bs, options);
 }
+
+ExtSnapshotPerm bdrv_check_ext_snapshot(BlockDriverState *bs)
+{
+    if (bs->drv->bdrv_check_ext_snapshot) {
+        return bs->drv->bdrv_check_ext_snapshot(bs);
+    }
+
+    if (bs->file && bs->file->drv && bs->file->drv->bdrv_check_ext_snapshot) {
+        return bs->file->drv->bdrv_check_ext_snapshot(bs);
+    }
+
+    /* external snapshots are allowed by default */
+    return EXT_SNAPSHOT_ALLOWED;
+}
+
+ExtSnapshotPerm bdrv_check_ext_snapshot_forbidden(BlockDriverState *bs)
+{
+    return EXT_SNAPSHOT_FORBIDDEN;
+}