ovl: store and show the user provided lowerdir mount option

[thirdparty/kernel/linux.git] / fs / overlayfs / super.c

diff --git a/fs/overlayfs/super.c b/fs/overlayfs/super.c
index 1a95ee237fa9b1378cd5f4c6b6d0aec4a1fc6757..500d3c2a38fd9a413aa3467d366398d5f2fb88b8 100644 (file)
--- a/fs/overlayfs/super.c
+++ b/fs/overlayfs/super.c
@@ -1328,8 +1328,11 @@ int ovl_fill_super(struct super_block *sb, struct fs_context *fc)
        ofs->layers = layers;
        /*
         * Layer 0 is reserved for upper even if there's no upper.
-        * For consistency, config.lowerdirs[0] is NULL.
+        * config.lowerdirs[0] is used for storing the user provided colon
+        * separated lowerdir string.
         */
+       ofs->config.lowerdirs[0] = ctx->lowerdir_all;
+       ctx->lowerdir_all = NULL;
        ofs->numlayer = 1;
 
        sb->s_stack_depth = 0;