With metacopy=on, fail mount instead of disabling index feature on
detection of non unique uuid among underlying filesystems.
Signed-off-by: Amir Goldstein <amir73il@xxxxxxxxx>
---
fs/overlayfs/super.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/fs/overlayfs/super.c b/fs/overlayfs/super.c
index 4aca0cc67455..d848112f4fc9 100644
--- a/fs/overlayfs/super.c
+++ b/fs/overlayfs/super.c
@@ -1323,6 +1323,12 @@ static int ovl_get_fsid(struct ovl_fs *ofs, const struct path *path)
pr_warn("overlayfs: %s uuid detected in lower fs '%pd2', falling back to index=off,nfs_export=off.\n",
uuid_is_null(&sb->s_uuid) ? "null" : "conflicting",
path->dentry);
+
+ err = ovl_feature_requires(&ofs->config,
+ "NFS export and inode index",
+ "unique uuid with multiple underlying fs");
+ if (err)
+ return err;
}
err = get_anon_bdev(&dev);
--
2.17.1
