diff options
author | Eric W. Biederman <ebiederm@xmission.com> | 2015-05-09 15:54:49 -0500 |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-07-21 10:10:00 -0700 |
commit | c2f633b99857d27333de18f53d123a180672c52b (patch) | |
tree | 5df2d42d37538cd7c1abed60c471d75fdd320e13 /include/linux/sysctl.h | |
parent | 5cf9896dc5c72a6c68c36140568b755f697f7760 (diff) |
fs: Add helper functions for permanently empty directories.
commit fbabfd0f4ee2e8847bf56edf481249ad1bb8c44d upstream.
To ensure it is safe to mount proc and sysfs I need to check if
filesystems that are mounted on top of them are mounted on truly empty
directories. Given that some directories can gain entries over time,
knowing that a directory is empty right now is insufficient.
Therefore add supporting infrastructure for permantently empty
directories that proc and sysfs can use when they create mount points
for filesystems and fs_fully_visible can use to test for permanently
empty directories to ensure that nothing will be gained by mounting a
fresh copy of proc or sysfs.
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/linux/sysctl.h')
0 files changed, 0 insertions, 0 deletions