Greg please apply the following patches to tty-next. If tty-next is not
the proper tree please let me know and I will take these patches through
my user namespace tree.
The follow patches perform a few small cleanups and one enhancement to
devpts, with a net decrease in code size.
The big achievement from a code maintenance point of view is being able
to use mount_nodev in devpts_mount.
The only really significant bug fix is handling the very unlikely case
when kzalloc fails in new_pts_fs_info called from devpts_fill_super and
s_fs_info is NULL when devpts_kill_sb is called from deactivate_locked
super.
The final patch is an enhancment to use the fsuid and fsgid of the mounter
of devpts as the owner of /dev/pts/ptmx. This is a feature that has
been asked for by users of user namespaces a couple of times, so that
they are not required to have uid 0 mapped into a user namespace to use
devpts.
Eric
fs/devpts/inode.c | 71 ++++++++++++++++++++-----------------------------------
1 file changed, 26 insertions(+), 45 deletions(-)
Eric W. Biederman (6):
devpts: Move parse_mount_options into fill_super
devpts: Move the creation of /dev/pts/ptmx into fill_super
devpts: Simplify devpts_mount by using mount_nodev
devpts: Make devpts_kill_sb safe if fsi is NULL
devpts: Remove sync_filesystems
devpts: Change the owner of /dev/pts/ptmx to the mounter of /dev/pts
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