Eric W. Biederman b5eb51f2ee mnt: Refactor the logic for mounting sysfs and proc in a user namespace ... commit 1b852bceb0 upstream. Fresh mounts of proc and sysfs are a very special case that works very much like a bind mount. Unfortunately the current structure can not preserve the MNT_LOCK... mount flags. Therefore refactor the logic into a form that can be modified to preserve those lock bits. Add a new filesystem flag FS_USERNS_VISIBLE that requires some mount of the filesystem be fully visible in the current mount namespace, before the filesystem may be mounted. Move the logic for calling fs_fully_visible from proc and sysfs into fs/namespace.c where it has greater access to mount namespace state. Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2015-07-21 10:10:01 -07:00
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Kconfig	kernfs: add CONFIG_KERNFS	2014-02-07 16:08:57 -08:00
Makefile	sysfs, kernfs: move inode code to fs/kernfs/inode.c	2013-11-29 17:55:10 -08:00
dir.c	sysfs: Add support for permanently empty directories to serve as mount points.	2015-07-21 10:10:01 -07:00
file.c	kernfs: remove KERNFS_STATIC_NAME	2015-02-13 21:21:36 -08:00
group.c	sysfs: Only accept read/write permissions for file attributes	2015-03-25 13:27:57 +01:00
mount.c	mnt: Refactor the logic for mounting sysfs and proc in a user namespace	2015-07-21 10:10:01 -07:00
symlink.c	kernfs: s/sysfs/kernfs/ in constants	2013-12-11 17:39:20 -08:00
sysfs.h	kernfs: s/sysfs_dirent/kernfs_node/ and rename its friends accordingly	2013-12-11 15:28:36 -08:00