kernfs: Add support for always empty directories.

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commit ea015218f2 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: Luis Henriques <luis.henriques@canonical.com>

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Eric W. Biederman 2015-05-13 16:09:29 -05:00 • committed by Luis Henriques

parent ece4748015

commit 4e6378f17c

3 changed files with 42 additions and 1 deletions

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38

fs/kernfs/dir.c

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2

fs/kernfs/inode.c

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3

include/linux/kernfs.h

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