From ea015218f2f7ace2dad9cedd21ed95bdba2886d7 Mon Sep 17 00:00:00 2001 From: "Eric W. Biederman" Date: Wed, 13 May 2015 16:09:29 -0500 Subject: kernfs: Add support for always empty directories. Add a new function kernfs_create_empty_dir that can be used to create directory that can not be modified. Update the code to use make_empty_dir_inode when reporting a permanently empty directory to the vfs. Update the code to not allow adding to permanently empty directories. Cc: stable@vger.kernel.org Signed-off-by: "Eric W. Biederman" --- fs/kernfs/inode.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'fs/kernfs/inode.c') diff --git a/fs/kernfs/inode.c b/fs/kernfs/inode.c index 2da8493..756dd56 100644 --- a/fs/kernfs/inode.c +++ b/fs/kernfs/inode.c @@ -296,6 +296,8 @@ static void kernfs_init_inode(struct kernfs_node *kn, struct inode *inode) case KERNFS_DIR: inode->i_op = &kernfs_dir_iops; inode->i_fop = &kernfs_dir_fops; + if (kn->flags & KERNFS_EMPTY_DIR) + make_empty_dir_inode(inode); break; case KERNFS_FILE: inode->i_size = kn->attr.size; -- cgit v1.1