[PATCH v5 0/4] Overlayfs: constant st_ino/d_ino for non-samefs

[Amir Goldstein <amir73il@gmail.com>]

Miklos,

I rebased and pushed a new version of Chandan's patches to my
overlayfs devel branch [1].

I am posting this for review here as v5, although I lost count on the real
revision number.

Beyond rebase, cleanup and checkpatch warning fixes I made the following
cosmetic modifications since previous version:

1. s/struct ovl_lower_mnt/struct ovl_layer
2. s/struct ovl_lower/struct ovl_path
3. s/ofs->lower_mnt/ofs->lower_layers
4. ovl_find_layer() mini helper for ovl_lookup()
5. split cleanup patch of include ovl_entry.h

The cosmetic changes make the struct member variables names .layer and
.lower_layers consistent with their type (struct ovl_layer).
The type name struct ovl_path fits better IMO to the argument list of
ovl_check_origin() which will later be used to check "upper origin"
as well (index=all patches).

I tested these patches with upstream xfstest overlay/041 by Chandan
and with unionmount test './run --ov --verify' that is avialble on my
unionmount devel branch [2].

My overlayfs devel branch [1] contains also the patches by Zhangyi
for not exposing whiteouts when lower dir is gone missing. I tested these
changes with upstream xfstest overlay/031 by Zhangyi.

Please consider the patches from my devel branch [1] for v4.15.

Thanks,
Amir.

[1] https://github.com/amir73il/linux/commits/overlayfs-devel
[2] https://github.com/amir73il/unionmount-testsuite/commits/overlayfs-devel

Amir Goldstein (2):
  ovl: move include of ovl_entry.h into overlayfs.h
  ovl: relax same fs constrain for constant st_ino

Chandan Rajendra (2):
  ovl: allocate anonymous devs for lowerdirs
  ovl: relax same fs constraint for constant d_ino

 fs/overlayfs/copy_up.c   |  1 -
 fs/overlayfs/inode.c     | 51 +++++++++++++++++++++---------
 fs/overlayfs/namei.c     | 53 ++++++++++++++++++-------------
 fs/overlayfs/overlayfs.h |  5 +--
 fs/overlayfs/ovl_entry.h | 14 +++++++--
 fs/overlayfs/readdir.c   | 24 +++++++-------
 fs/overlayfs/super.c     | 81 ++++++++++++++++++++++++++++++------------------
 fs/overlayfs/util.c      |  8 +++--
 8 files changed, 152 insertions(+), 85 deletions(-)

-- 
2.7.4