[PATCH v2 0/3] ovl: acl fixes

[Christian Brauner <brauner@kernel.org>]

From: "Christian Brauner (Microsoft)" <brauner@kernel.org>

Hey everyone,
Hey Miklos,

This is the series I described and announced in the commit message to
the patch I sent yesterdat (see [1]). It enables POSIX ACLs for
overlayfs on top of idmapped layers. It encompasses everything that is
needed to make this work correctly. There is a detailed explanation in
the first patch of this series so I won't repeat it all here in the
cover letter.

My plan would be to get this ready for the next merge window.
Once Miklos has merged the temporary fix I sent out yesterday in [1] and
it shows up in mainline I will rebase this series on top of the next
mainline rc. I will then add a revert of the fix in [1] to this series
reenabling POSIX ACL support for overlayfs on top of idmapped layers.

I will also merge in the vfs{g,u}id_t work that is in -next replacing
the old idmapped mount helpers with the new type safe idmapping helpers.

This survives LTP and xfstests:
sudo ./runltp -f fs_perms_simple,fs_bind,containers,cap_bounds,cve,uevent,filecaps
sudo ./check -g quick
sudo ./check -g overlay/union -overlay
sudo ./check -g quick -overlay
sudo ./check -g overlay/union -overlay # export IDMAPPED_MOUNTS=true
sudo ./check -g quick -overlay # export IDMAPPED_MOUNTS=true

Note that I'll be on vacation next week and so will be looking at mail
less frequently.

Thanks!
Christian

[1]: https://lore.kernel.org/linux-unionfs/20220707130520.321344-1-brauner@kernel.org

Christian Brauner (3):
  acl: move idmapped mount fixup into vfs_{g,s}etxattr()
  acl: make posix_acl_clone() available to overlayfs
  ovl: handle idmappings in ovl_get_acl()

 fs/ksmbd/vfs.c                  |   2 +-
 fs/ksmbd/vfs.h                  |   2 +-
 fs/overlayfs/inode.c            |  86 +++++++++++++++++--
 fs/overlayfs/overlayfs.h        |   3 +-
 fs/posix_acl.c                  | 142 ++++++++++++++++++++++----------
 fs/xattr.c                      |  25 ++++--
 include/linux/posix_acl.h       |   1 +
 include/linux/posix_acl_xattr.h |  34 +++++---
 include/linux/xattr.h           |   2 +-
 9 files changed, 224 insertions(+), 73 deletions(-)


base-commit: 88084a3df1672e131ddc1b4e39eeacfd39864acf
-- 
2.34.1