| From: |
| Christian Brauner <christian.brauner-AT-ubuntu.com> |
| To: |
| viro-AT-zeniv.linux.org.uk, torvalds-AT-linux-foundation.org, linux-fsdevel-AT-vger.kernel.org, linux-kernel-AT-vger.kernel.org, hch-AT-infradead.org |
| Subject: |
| [PATCH 0/6 resend] statfs: handle mount propagation |
| Date: |
| Wed, 2 May 2018 17:42:33 +0200 |
| Message-ID: |
| <20180502154239.14013-1-christian.brauner@ubuntu.com> |
| Cc: |
| tglx-AT-linutronix.de, kstewart-AT-linuxfoundation.org, gregkh-AT-linuxfoundation.org, pombredanne-AT-nexb.com, Christian Brauner <christian.brauner-AT-ubuntu.com> |
| Archive-link: |
| Article |
Hey,
This is the second resend of this patchset. I'm not sure whether it has
simply been overlooked but the number of people get_maintainer.pl was
rather small and seemed a little random so I added Linus and Christoph,
two people I know that do look at VFS stuff at least from time to time,
although they weren't listed by get_maintainer.pl. I hope that's ok.
This little series
- unifies the definition of constants in statfs.h and fs.h
*Note, that Andreas has expressed doubts whether this unification is
useful. Please see https://lkml.org/lkml/2018/4/13/571 . I still think
it is but I'm happy to drop these two patches if others agree.*
- extends statfs to handle mount propagation. This will let userspace
easily query a given mountpoint for MS_UNBINDABLE, MS_SHARED,
MS_PRIVATE and MS_SLAVE without always having to do costly parsing of
/proc/<pid>/mountinfo.
To this end the flags:
- ST_UNBINDABLE
- ST_SHARED
- ST_PRIVATE
- ST_SLAVE
are added. They have the same value as their MS_* counterparts.
Thanks!
Christian
Christian Brauner (6):
fs: use << for MS_* flags
statfs: use << to align with fs header
statfs: add ST_UNBINDABLE
statfs: add ST_SHARED
statfs: add ST_SLAVE
statfs: add ST_PRIVATE
fs/statfs.c | 16 +++++++++++++++-
include/linux/statfs.h | 30 +++++++++++++++++-------------
include/uapi/linux/fs.h | 33 +++++++++++++++++----------------
3 files changed, 49 insertions(+), 30 deletions(-)
--
2.17.0
