[PULL,24/36] blkverify: Implement .bdrv_recurse_can_replace()

Commit Message

Kevin Wolf Feb. 18, 2020, 2:07 p.m. UTC

From: Max Reitz <[e-mail]>

Signed-off-by: Max Reitz <[e-mail]>
Reviewed-by: Vladimir Sementsov-Ogievskiy <[e-mail]>
Message-Id: <[e-mail]>
Signed-off-by: Kevin Wolf <[e-mail]>
---
 block/blkverify.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

Patch

diff --git a/block/blkverify.c b/block/blkverify.c
index 304b0a1368..0add3ab483 100644
--- a/block/blkverify.c
+++ b/block/blkverify.c
@@ -282,6 +282,20 @@  static bool blkverify_recurse_is_first_non_filter(BlockDriverState *bs,
     return bdrv_recurse_is_first_non_filter(s->test_file->bs, candidate);
 }
 
+static bool blkverify_recurse_can_replace(BlockDriverState *bs,
+                                          BlockDriverState *to_replace)
+{
+    BDRVBlkverifyState *s = bs->opaque;
+
+    /*
+     * blkverify quits the whole qemu process if there is a mismatch
+     * between bs->file->bs and s->test_file->bs.  Therefore, we know
+     * know that both must match bs and we can recurse down to either.
+     */
+    return bdrv_recurse_can_replace(bs->file->bs, to_replace) ||
+           bdrv_recurse_can_replace(s->test_file->bs, to_replace);
+}
+
 static void blkverify_refresh_filename(BlockDriverState *bs)
 {
     BDRVBlkverifyState *s = bs->opaque;
@@ -328,6 +342,7 @@  static BlockDriver bdrv_blkverify = {
 
     .is_filter                        = true,
     .bdrv_recurse_is_first_non_filter = blkverify_recurse_is_first_non_filter,
+    .bdrv_recurse_can_replace         = blkverify_recurse_can_replace,
 };
 
 static void bdrv_blkverify_init(void)