From bc70682a497c4f3c968c552e465d1d9948b1ff4c Mon Sep 17 00:00:00 2001
From: Christian Brauner <brauner@kernel.org>
Date: Mon, 4 Apr 2022 12:51:58 +0200
Subject: [PATCH] ovl: support idmapped layers
Now that overlay is able to take a layers idmapping into account allow
overlay mounts to be created on top of idmapped mounts.
Cc: <linux-unionfs@vger.kernel.org>
Tested-by: Giuseppe Scrivano <gscrivan@redhat.com>
Reviewed-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Christian Brauner (Microsoft) <brauner@kernel.org>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
---
fs/overlayfs/ovl_entry.h | 2 +-
fs/overlayfs/super.c | 4 ----
2 files changed, 1 insertion(+), 5 deletions(-)
diff --git a/fs/overlayfs/ovl_entry.h b/fs/overlayfs/ovl_entry.h
index 469162ca9b213..e1af8f6606984 100644
--- a/fs/overlayfs/ovl_entry.h
+++ b/fs/overlayfs/ovl_entry.h
@@ -92,7 +92,7 @@ static inline struct vfsmount *ovl_upper_mnt(struct ovl_fs *ofs)
static inline struct user_namespace *ovl_upper_mnt_userns(struct ovl_fs *ofs)
{
- return &init_user_ns;
+ return mnt_user_ns(ovl_upper_mnt(ofs));
}
static inline struct ovl_fs *OVL_FS(struct super_block *sb)
diff --git a/fs/overlayfs/super.c b/fs/overlayfs/super.c
index 0123c8086ee96..e0a2e0468ee7f 100644
--- a/fs/overlayfs/super.c
+++ b/fs/overlayfs/super.c
@@ -874,10 +874,6 @@ static int ovl_mount_dir_noesc(const char *name, struct path *path)
pr_err("filesystem on '%s' not supported\n", name);
goto out_put;
}
- if (is_idmapped_mnt(path->mnt)) {
- pr_err("idmapped layers are currently not supported\n");
- goto out_put;
- }
if (!d_is_dir(path->dentry)) {
pr_err("'%s' not a directory\n", name);
goto out_put;
--
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