[PATCH v3 0/5] Store overlay real upper file in ovl_file

[Amir Goldstein <amir73il@gmail.com>]

Hi all,

This is v3 of the code to avoid temporary backing file opens in
overlayfs, taking into account Al's and Miklos' comments on v2 [1].

If no further comments, this is going for overlayfs-next.

Thanks,
Amir.

Changes since v2:
- Simplifications to flow (Al)
- Loose backing_file stash in favor of ovl_file (Miklos)

Changes since v1:
- Use helpers ovl_real_file() and ovl_upper_file() to express that
  ovl_real_file() cannot return NULL
- Fix readability and bug is code to select and store stashed upperfile

[1] https://lore.kernel.org/linux-unionfs/20241006082359.263755-1-amir73il@gmail.com/

Amir Goldstein (5):
  ovl: do not open non-data lower file for fsync
  ovl: allocate a container struct ovl_file for ovl private context
  ovl: store upper real file in ovl_file struct
  ovl: convert ovl_real_fdget_path() callers to ovl_real_file_path()
  ovl: convert ovl_real_fdget() callers to ovl_real_file()

 fs/overlayfs/file.c | 301 +++++++++++++++++++++++++-------------------
 1 file changed, 173 insertions(+), 128 deletions(-)

-- 
2.34.1