[GIT PULL] overlayfs update for 6.7

[Amir Goldstein]

Hi Linus,

Please pull overlayfs update for 6.7.

Most of the changes in this update have been sitting in linux-next for
several weeks, based on two prerequisite vfs topic branches.
Last week, after the vfs branches were merged, I rebased overlayfs-next
to reduce noise.

Last week, I also added patches for new mount options to replace the
lowerdir append syntax that we disabled in v6.6-rc6 and v6.5.8.

This branch has gone through the usual overlayfs test routines and it
merges cleanly with master branch of the moment.

Thanks,
Amir.

----------------------------------------------------------------
The following changes since commit 14ab6d425e80674b6a0145f05719b11e82e64824:

  Merge tag 'vfs-6.7.ctime' of gitolite.kernel.org:pub/scm/linux/kernel/git/vfs/vfs (2023-10-30 09:47:13 -1000)

are available in the Git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/overlayfs/vfs.git ovl-update-6.7

for you to fetch changes up to 24e16e385f2272b1a9df51337a5c32d28a29c7ad:

  ovl: add support for appending lowerdirs one by one (2023-10-31 00:13:02 +0200)

----------------------------------------------------------------
overlayfs update for 6.7

Contains the following patch sets:

- Overlayfs aio cleanups and fixes [1]

- Overlayfs lock ordering changes [2]

- Add support for nesting overlayfs private xattrs [3]

- Add new mount options for appending lowerdirs [4]

[1] https://lore.kernel.org/r/20230912173653.3317828-1-amir73il@xxxxxxxxx/
[2] https://lore.kernel.org/r/20230816152334.924960-1-amir73il@xxxxxxxxx/
[3] https://lore.kernel.org/r/cover.1694512044.git.alexl@xxxxxxxxxx/
[4] https://lore.kernel.org/r/20231030120419.478228-1-amir73il@xxxxxxxxx/

----------------------------------------------------------------
Alexander Larsson (4):
      ovl: Add OVL_XATTR_TRUSTED/USER_PREFIX_LEN macros
      ovl: Support escaped overlay.* xattrs
      ovl: Add an alternative type of whiteout
      ovl: Add documentation on nesting of overlayfs mounts

Amir Goldstein (14):
      ovl: use simpler function to convert iocb to rw flags
      ovl: propagate IOCB_APPEND flag on writes to realfile
      ovl: punt write aio completion to workqueue
      ovl: protect copying of realinode attributes to ovl inode
      ovl: add helper ovl_file_modified()
      ovl: split ovl_want_write() into two helpers
      ovl: reorder ovl_want_write() after ovl_inode_lock()
      ovl: do not open/llseek lower file with upper sb_writers held
      ovl: do not encode lower fh with upper sb_writers held
      ovl: Move xattr support to new xattrs.c file
      ovl: remove unused code in lowerdir param parsing
      ovl: store and show the user provided lowerdir mount option
      ovl: refactor layer parsing helpers
      ovl: add support for appending lowerdirs one by one

 Documentation/filesystems/overlayfs.rst |  40 +++-
 fs/overlayfs/Makefile                   |   2 +-
 fs/overlayfs/copy_up.c                  | 142 +++++++++-----
 fs/overlayfs/dir.c                      |  64 +++----
 fs/overlayfs/export.c                   |   7 +-
 fs/overlayfs/file.c                     |  88 ++++++---
 fs/overlayfs/inode.c                    | 165 ++--------------
 fs/overlayfs/namei.c                    |  52 ++++--
 fs/overlayfs/overlayfs.h                |  72 +++++--
 fs/overlayfs/params.c                   | 322 +++++++++++++++++---------------
 fs/overlayfs/params.h                   |   1 +
 fs/overlayfs/readdir.c                  |  27 ++-
 fs/overlayfs/super.c                    |  92 ++-------
 fs/overlayfs/util.c                     | 115 +++++++++++-
 fs/overlayfs/xattrs.c                   | 271 +++++++++++++++++++++++++++
 fs/super.c                              |   1 +
 16 files changed, 929 insertions(+), 532 deletions(-)
 create mode 100644 fs/overlayfs/xattrs.c