From: =?UTF-8?q?=E6=9D=8E=E6=9E=97=E5=93=B2?= <lilin...@ijinshan.com>
Date: Wed, 6 Jan 2016 15:03:58 +0800
Subject: [PATCH] New module param allow_userns for allow unprivileged to mount
under userns.
Signed-off-by: Li LinZhe <lilin...@ijinshan.com>
---
fs/overlayfs/super.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/fs/overlayfs/super.c b/fs/overlayfs/super.c
index e38ee0f..35c79af 100644
--- a/fs/overlayfs/super.c
+++ b/fs/overlayfs/super.c
@@ -1102,8 +1102,13 @@ static struct file_system_type ovl_fs_type = {
};
MODULE_ALIAS_FS("overlay");
+static bool ovl_userns;
+MODULE_PARM_DESC(allow_userns, "allow unprivileged to mount under userns");
+module_param_named(allow_userns, ovl_userns, bool, S_IRUGO);
+
static int __init ovl_init(void)
{
+ ovl_fs_type.fs_flags |= ovl_userns ? FS_USERNS_MOUNT : 0;
return register_filesystem(&ovl_fs_type);
}
--
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