[PATCH 0/5] Overlayfs lazy lookup of lowerdata

[Amir Goldstein <amir73il@gmail.com>]

Miklos,

Here are the patches discussed earlier at [1].
They are based on the already posted cleanup series [2].

This work is motivated by Alexander's composefs use case.
Alexander has been developing and testing his fsverity patches over
my lazy-lowerdata-lookup branch [3].

Alexander has also written tests for lazy lowerdata lookup [4].

Thanks,
Amir.

[1] https://lore.kernel.org/linux-unionfs/CAOQ4uxich227fP7bGSCNqx-JX5h36O-MLwqPoy0r33tuH=z2cA@mail.gmail.com/
[2] https://lore.kernel.org/linux-unionfs/20230408164302.1392694-1-amir73il@gmail.com/
[3] https://github.com/amir73il/linux/commits/ovl-lazy-lowerdata
[4] https://github.com/amir73il/xfstests/commits/ovl-lazy-lowerdata


Amir Goldstein (5):
  ovl: remove unneeded goto instructions
  ovl: introduce data-only lower layers
  ovl: implement lookup in data-only layers
  ovl: prepare for lazy lookup of lowerdata inode
  ovl: implement lazy lookup of lowerdata in data-only layers

 Documentation/filesystems/overlayfs.rst |  32 +++++++
 fs/overlayfs/copy_up.c                  |   9 ++
 fs/overlayfs/export.c                   |   2 +-
 fs/overlayfs/file.c                     |  21 +++-
 fs/overlayfs/inode.c                    |  18 +++-
 fs/overlayfs/namei.c                    | 121 +++++++++++++++++++++++-
 fs/overlayfs/overlayfs.h                |   2 +
 fs/overlayfs/ovl_entry.h                |  11 ++-
 fs/overlayfs/super.c                    |  68 +++++++++----
 fs/overlayfs/util.c                     |  33 ++++++-
 10 files changed, 286 insertions(+), 31 deletions(-)

-- 
2.34.1