[GIT PULL] overlayfs update for 6.6

[Amir Goldstein]

Hi Linus,

Resending the pull request with signed tag.

This branch has been sitting in linux-next for several weeks and it
has gone through all the usual overlayfs test routines.

The branch has also been tested together with the changes in
Christain's vfs tree, which have been merged to master yesterday.

The branch merges cleanly with master branch of the moment.

Please refer to details about contained patch sets below.

Thanks,
Amir.

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The following changes since commit 52a93d39b17dc7eb98b6aa3edb93943248e03b2f:

  Linux 6.5-rc5 (2023-08-06 15:07:51 -0700)

are available in the Git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/overlayfs/vfs.git ovl-update-6.6

for you to fetch changes up to adcd459ff805ce5e11956cfa1e9aa85471b6ae8d:

  ovl: validate superblock in OVL_FS() (2023-08-12 19:02:54 +0300)

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Overlayfs update for 6.6

Contains the following patch sets:

Alexander Larsson added the verification feature needed by composefs
- [1] Add support for fs-verity checking of lowerdata

Amir Goldstein improved integration of overlayfs and fanotify
- [2] Report overlayfs file ids with fanotify

Andrea Righi fortified some overlayfs code
- [3] overlayfs: debugging check for valid superblock

[1] https://lore.kernel.org/r/cover.1687345663.git.alexl@xxxxxxxxxx
[2] https://lore.kernel.org/r/20230713120344.1422468-1-amir73il@xxxxxxxxx
[3] https://lore.kernel.org/r/20230521082813.17025-1-andrea.righi@xxxxxxxxxxxxx

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Alexander Larsson (4):
      ovl: Add framework for verity support
      ovl: Add versioned header for overlay.metacopy xattr
      ovl: Validate verity xattr when resolving lowerdata
      ovl: Handle verity during copy-up

Amir Goldstein (4):
      ovl: support encoding non-decodable file handles
      ovl: add support for unique fsid per instance
      ovl: store persistent uuid/fsid with uuid=on
      ovl: auto generate uuid for new overlay filesystems

Andrea Righi (3):
      ovl: Kconfig: introduce CONFIG_OVERLAY_FS_DEBUG
      ovl: make consistent use of OVL_FS()
      ovl: validate superblock in OVL_FS()

 Documentation/filesystems/fsverity.rst  |   2 +
 Documentation/filesystems/overlayfs.rst |  72 ++++++++++
 fs/overlayfs/Kconfig                    |   9 ++
 fs/overlayfs/copy_up.c                  |  54 +++++++-
 fs/overlayfs/export.c                   |  36 +++--
 fs/overlayfs/file.c                     |   8 +-
 fs/overlayfs/inode.c                    |   8 +-
 fs/overlayfs/namei.c                    |  89 ++++++++++--
 fs/overlayfs/overlayfs.h                |  66 ++++++++-
 fs/overlayfs/ovl_entry.h                |   9 +-
 fs/overlayfs/params.c                   |  96 +++++++++++--
 fs/overlayfs/super.c                    |  40 ++++--
 fs/overlayfs/util.c                     | 233 ++++++++++++++++++++++++++++++--
 13 files changed, 654 insertions(+), 68 deletions(-)