An overlay mount with no upper layer (a.k.a ovl_force_readonly)
does not need an index, because there is no copy up, so there is
no reason to spew warnings about lower layer file handle support
for index=on.
Signed-off-by: Amir Goldstein <amir73il@xxxxxxxxx>
---
fs/overlayfs/super.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/fs/overlayfs/super.c b/fs/overlayfs/super.c
index c88493b01d8d..6381e71b0d5d 100644
--- a/fs/overlayfs/super.c
+++ b/fs/overlayfs/super.c
@@ -922,6 +922,9 @@ static int ovl_fill_super(struct super_block *sb, void *data, int silent)
} else if (!ufs->config.upperdir && stacklen == 1) {
pr_err("overlayfs: at least 2 lowerdir are needed while upperdir nonexistent\n");
goto out_free_lowertmp;
+ } else if (!ufs->config.upperdir || !ufs->config.workdir) {
+ /* Read-only mount - skip file handle support checks */
+ ufs->config.index = false;
}
err = -ENOMEM;
--
2.7.4
--
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