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| author | Eric W. Biederman <ebiederm@xmission.com> | 2015-05-13 16:09:29 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-07-21 10:10:00 -0700 |
| commit | 80c298105bf80e33ae494eaeba51f00352b5373c (patch) | |
| tree | 173d2fa47f6a58fec963d859ab6dfcd553c62ff8 /include | |
| parent | a2020b02c1ec4fffddb77785773dff533428f814 (diff) | |
| download | lwn-80c298105bf80e33ae494eaeba51f00352b5373c.tar.gz lwn-80c298105bf80e33ae494eaeba51f00352b5373c.zip | |
kernfs: Add support for always empty directories.
commit ea015218f2f7ace2dad9cedd21ed95bdba2886d7 upstream.
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.
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/kernfs.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/kernfs.h b/include/linux/kernfs.h index 71ecdab1671b..29d1896c3ba5 100644 --- a/include/linux/kernfs.h +++ b/include/linux/kernfs.h @@ -45,6 +45,7 @@ enum kernfs_node_flag { KERNFS_LOCKDEP = 0x0100, KERNFS_SUICIDAL = 0x0400, KERNFS_SUICIDED = 0x0800, + KERNFS_EMPTY_DIR = 0x1000, }; /* @flags for kernfs_create_root() */ @@ -285,6 +286,8 @@ void kernfs_destroy_root(struct kernfs_root *root); struct kernfs_node *kernfs_create_dir_ns(struct kernfs_node *parent, const char *name, umode_t mode, void *priv, const void *ns); +struct kernfs_node *kernfs_create_empty_dir(struct kernfs_node *parent, + const char *name); struct kernfs_node *__kernfs_create_file(struct kernfs_node *parent, const char *name, umode_t mode, loff_t size, |