[GIT PULL] y2038: add inode timestamp clamping

From: Arnd Bergmann <arnd@arndb.de>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Deepa Dinamani <deepa.kernel@gmail.com>,
	y2038 Mailman List <y2038@lists.linaro.org>,
	Al Viro <viro@zeniv.linux.org.uk>,
	Linux FS-devel Mailing List <linux-fsdevel@vger.kernel.org>
Subject: [GIT PULL] y2038: add inode timestamp clamping
Date: Mon, 16 Sep 2019 19:14:42 +0200	[thread overview]
Message-ID: <CAK8P3a1-rHJ0u5iJMZFNefYzhMUqSJVBXGLh2Cg4DBO5VZbi0g@mail.gmail.com> (raw)

The following changes since commit a55aa89aab90fae7c815b0551b07be37db359d76:

  Linux 5.3-rc6 (2019-08-25 12:01:23 -0700)

are available in the Git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/arnd/playground.git
tags/y2038-vfs

for you to fetch changes up to cba465b4f9820b0d929822a70341dde14909fc18:

  ext4: Reduce ext4 timestamp warnings (2019-09-04 22:54:53 +0200)

----------------------------------------------------------------
y2038: add inode timestamp clamping

This series from Deepa Dinamani adds a per-superblock minimum/maximum
timestamp limit for a file system, and clamps timestamps as they are
written, to avoid random behavior from integer overflow as well as having
different time stamps on disk vs in memory.

At mount time, a warning is now printed for any file system that can
represent current timestamps but not future timestamps more than 30
years into the future, similar to the arbitrary 30 year limit that was
added to settimeofday().

This was picked as a compromise to warn users to migrate to other file
systems (e.g. ext4 instead of ext3) when they need the file system to
survive beyond 2038 (or similar limits in other file systems), but not
get in the way of normal usage.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>

----------------------------------------------------------------
Arnd Bergmann (1):
      Merge branch 'limits' of https://github.com/deepa-hub/vfs into y2038

Deepa Dinamani (19):
      vfs: Add file timestamp range support
      vfs: Add timestamp_truncate() api
      timestamp_truncate: Replace users of timespec64_trunc
      mount: Add mount warning for impending timestamp expiry
      utimes: Clamp the timestamps before update
      fs: Fill in max and min timestamps in superblock
      9p: Fill min and max timestamps in sb
      ext4: Initialize timestamps limits
      fs: nfs: Initialize filesystem timestamp ranges
      fs: cifs: Initialize filesystem timestamp ranges
      fs: fat: Initialize filesystem timestamp ranges
      fs: affs: Initialize filesystem timestamp ranges
      fs: sysv: Initialize filesystem timestamp ranges
      fs: ceph: Initialize filesystem timestamp ranges
      fs: hpfs: Initialize filesystem timestamp ranges
      fs: omfs: Initialize filesystem timestamp ranges
      pstore: fs superblock limits
      isofs: Initialize filesystem timestamp ranges
      ext4: Reduce ext4 timestamp warnings

 fs/9p/vfs_super.c        |  6 +++++-
 fs/affs/amigaffs.c       |  2 +-
 fs/affs/amigaffs.h       |  3 +++
 fs/affs/inode.c          |  4 ++--
 fs/affs/super.c          |  4 ++++
 fs/attr.c                | 21 ++++++++++++---------
 fs/befs/linuxvfs.c       |  2 ++
 fs/bfs/inode.c           |  2 ++
 fs/ceph/super.c          |  2 ++
 fs/cifs/cifsfs.c         | 22 ++++++++++++++++++++++
 fs/cifs/netmisc.c        | 14 +++++++-------
 fs/coda/inode.c          |  3 +++
 fs/configfs/inode.c      | 12 ++++++------
 fs/cramfs/inode.c        |  2 ++
 fs/efs/super.c           |  2 ++
 fs/ext2/super.c          |  2 ++
 fs/ext4/ext4.h           |  8 +++++++-
 fs/ext4/super.c          | 17 +++++++++++++++--
 fs/f2fs/file.c           | 21 ++++++++++++---------
 fs/fat/inode.c           | 12 ++++++++++++
 fs/freevxfs/vxfs_super.c |  2 ++
 fs/hpfs/hpfs_fn.h        |  6 ++----
 fs/hpfs/super.c          |  2 ++
 fs/inode.c               | 33 ++++++++++++++++++++++++++++++++-
 fs/isofs/inode.c         |  7 +++++++
 fs/jffs2/fs.c            |  3 +++
 fs/jfs/super.c           |  2 ++
 fs/kernfs/inode.c        |  7 +++----
 fs/minix/inode.c         |  2 ++
 fs/namespace.c           | 33 ++++++++++++++++++++++++++++++++-
 fs/nfs/super.c           | 20 +++++++++++++++++++-
 fs/ntfs/inode.c          | 21 ++++++++++++---------
 fs/omfs/inode.c          |  4 ++++
 fs/pstore/ram.c          |  2 ++
 fs/qnx4/inode.c          |  2 ++
 fs/qnx6/inode.c          |  2 ++
 fs/reiserfs/super.c      |  3 +++
 fs/romfs/super.c         |  2 ++
 fs/squashfs/super.c      |  2 ++
 fs/super.c               |  2 ++
 fs/sysv/super.c          |  5 ++++-
 fs/ubifs/file.c          | 21 ++++++++++++---------
 fs/ufs/super.c           |  7 +++++++
 fs/utimes.c              |  6 ++----
 fs/xfs/xfs_super.c       |  2 ++
 include/linux/fs.h       |  5 +++++
 include/linux/time64.h   |  2 ++
 47 files changed, 294 insertions(+), 72 deletions(-)