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| author | Eric W. Biederman <ebiederm@xmission.com> | 2015-05-13 23:09:29 +0200 |
|---|---|---|
| committer | Eric W. Biederman <ebiederm@xmission.com> | 2015-07-01 17:36:43 +0200 |
| commit | ea015218f2f7ace2dad9cedd21ed95bdba2886d7 (patch) | |
| tree | 9ab4dc58398a5ef08b174871a9cc587680261b65 /fs/kernfs/inode.c | |
| parent | proc: Allow creating permanently empty directories that serve as mount points (diff) | |
| download | linux-ea015218f2f7ace2dad9cedd21ed95bdba2886d7.tar.xz linux-ea015218f2f7ace2dad9cedd21ed95bdba2886d7.zip | |
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" <ebiederm@xmission.com>
Diffstat (limited to 'fs/kernfs/inode.c')
| -rw-r--r-- | fs/kernfs/inode.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/kernfs/inode.c b/fs/kernfs/inode.c index 2da8493a380b..756dd56aaf60 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; |