[PATCH 0/4] Prepare for fsnotify pre-content permission events

[Amir Goldstein <amir73il@gmail.com>]

Hi Jan & Christian,

I am not planning to post the fanotify pre-content event patches [1]
for 6.8.  Not because they are not ready, but because the usersapce
example is not ready.

Also, I think it is a good idea to let the large permission hooks
cleanup work to mature over the 6.8 cycle, before we introduce the
pre-content events.

However, I would like to include the following vfs prep patches along
with the vfs.rw PR for 6.8, which could be titled as the subject of
this cover letter.

Patch 1 is a variant of a cleanup suggested by Christoph to get rid
of the generic_copy_file_range() exported symbol.

Patches 2,3 add the file_write_not_started() assertion to fsnotify
file permission hooks.  IMO, it is important to merge it along with
vfs.rw because:

1. This assert is how I tested vfs.rw does what it aimed to achieve
2. This will protect us from new callers that break the new order
3. The commit message of patch 3 provides the context for the entire
   series and can be included in the PR message

Patch 4 is the final change of fsnotify permission hook locations/args
and is the last of the vfs prerequsites for pre-content events.

If we merge patch 4 for 6.8, it will be much easier for the development
of fanotify pre-content events in 6.9 dev cycle, which be contained
within the fsnotify subsystem.

Thanks,
Amir.

[1] https://github.com/amir73il/linux/commits/fan_pre_content

Amir Goldstein (4):
  fs: use splice_copy_file_range() inline helper
  fsnotify: split fsnotify_perm() into two hooks
  fsnotify: assert that file_start_write() is not held in permission
    hooks
  fsnotify: pass access range in file permission hooks

 fs/ceph/file.c           |  4 ++--
 fs/fuse/file.c           |  5 +++--
 fs/nfs/nfs4file.c        |  5 +++--
 fs/open.c                |  4 ++++
 fs/read_write.c          | 44 ++++++++--------------------------------
 fs/readdir.c             |  4 ++++
 fs/remap_range.c         |  8 +++++++-
 fs/smb/client/cifsfs.c   |  5 +++--
 fs/splice.c              |  2 +-
 include/linux/fs.h       |  3 ---
 include/linux/fsnotify.h | 42 ++++++++++++++++++++++++--------------
 include/linux/splice.h   |  8 ++++++++
 security/security.c      | 10 ++-------
 13 files changed, 72 insertions(+), 72 deletions(-)

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2.34.1