linux-kernel - [RFC 0/6] vfs: Add timestamp range check support

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Date:   Wed,  2 Nov 2016 08:04:50 -0700
From:   Deepa Dinamani <deepa.kernel@...il.com>
To:     linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     arnd@...db.de, tglx@...utronix.de, gregkh@...uxfoundation.org,
        akpm@...ux-foundation.org, tytso@....edu, viro@...iv.linux.org.uk,
        y2038@...ts.linaro.org, linux-afs@...ts.infradead.org,
        Andreas Dilger <adilger.kernel@...ger.ca>,
        linux-ext4@...r.kernel.org
Subject: [RFC 0/6] vfs: Add timestamp range check support

The series is aimed at adding timestamp checking and policy
related to it to vfs.

The series was developed with discussions and guidance from
Arnd Bergmann.

The original idea for the series was the discussion:
https://lkml.org/lkml/2014/5/30/551

Patches 5 and 6 can be merged only after vfs is transitioned
to use 64 bit timestamps as noted in the respective commit
texts.

The series only includes adding range limits to filesystems:
ext4 and afs as examples to keep the series simple.
Every filesystem will be updated to add these limits.

There is an ext4 current_time() api replacement patch that the
series depends on:
https://lkml.org/lkml/2016/6/9/38 .
This needs reposting to the mailing list.

The branch for the tree along with dependency can be found at

https://github.com/deepa-hub/vfs.git refs/heads/vfs_timestamp_policy

Deepa Dinamani (6):
  vfs: Add file timestamp range support
  vfs: Add checks for filesystem timestamp limits
  afs: Add time limits in the super block
  ext4: Initialize timestamps limits
  vfs: Add timestamp_truncate() api
  utimes: Clamp the timestamps before update

 fs/afs/super.c          |  2 ++
 fs/ext4/ext4.h          |  4 ++++
 fs/ext4/super.c         |  7 ++++++-
 fs/inode.c              | 37 ++++++++++++++++++++++++++++++++++++-
 fs/internal.h           |  2 ++
 fs/libfs.c              |  4 ++++
 fs/namespace.c          | 12 ++++++++++++
 fs/super.c              |  8 ++++++++
 fs/utimes.c             | 17 +++++++++++++----
 include/linux/fs.h      |  4 ++++
 include/linux/time64.h  |  6 ++++++
 include/uapi/linux/fs.h |  6 +++++-
 kernel/sysctl.c         |  7 +++++++
 13 files changed, 109 insertions(+), 7 deletions(-)

-- 
2.7.4

Cc: linux-afs@...ts.infradead.org
Cc: "Theodore Ts'o" <tytso@....edu>
Cc: Andreas Dilger <adilger.kernel@...ger.ca>
Cc: linux-ext4@...r.kernel.org