[PATCH v4 0/5] vfs: Add timestamp range check support

[Deepa Dinamani]

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 thread is at https://lkml.org/lkml/2016/11/2/294

Associated test: xfstests generic/402
Note that the above test will be run and will fail all filesystems that
do not have correct limits specified in the xfstests or the kernel or
that don't support times beyond the test dates. I will be submitting a
follow up xfstest and kernel patches to update all filesystems.
Currently ext4 is the only filesystem that reflects correct limits.

The branch is available at
https://github.com/deepa-hub/vfs.git refs/heads/vfs_timestamp_policy

Changes since v3:
* Remove redundant initializations in libfs.c
* Change early_param to __setup similar to other root mount options.
* Fix documentation warning
Changes since v2:
* Introduce early boot param override for checks.
* Drop afs patch for timestamp limits.
Changes since v1:
* return EROFS on mount errors
* fix mtime copy/paste error in utimes

Deepa Dinamani (5):
  vfs: Add file timestamp range support
  vfs: Add checks for filesystem timestamp limits
  ext4: Initialize timestamps limits
  vfs: Add timestamp_truncate() api
  utimes: Clamp the timestamps before update

 fs/ext4/ext4.h          |  4 ++++
 fs/ext4/super.c         |  7 ++++++-
 fs/inode.c              | 47 ++++++++++++++++++++++++++++++++++++++++++++++-
 fs/internal.h           |  2 ++
 fs/namespace.c          | 12 ++++++++++++
 fs/super.c              |  9 +++++++++
 fs/utimes.c             | 17 +++++++++++++----
 include/linux/fs.h      |  4 ++++
 include/linux/time64.h  |  6 ++++++
 include/uapi/linux/fs.h |  6 +++++-
 kernel/sysctl.c         |  7 +++++++
 11 files changed, 114 insertions(+), 7 deletions(-)

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2.7.4