linux-kernel - [GIT PULL 10/17 for v6.19] vfs super guards

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Message-ID: <20251128-vfs-super-guards-v619-45069c20bd0d@brauner>
Date: Fri, 28 Nov 2025 17:48:21 +0100
From: Christian Brauner <brauner@...nel.org>
To: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Christian Brauner <brauner@...nel.org>,
	linux-fsdevel@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [GIT PULL 10/17 for v6.19] vfs super guards

Hey Linus,

/* Summary */
This starts the work of introducing guards for superblock related locks.
Note that this branch includes the fs_header cleanups as a dependency.

Introduce super_write_guard for scoped superblock write protection. This
provides a guard-based alternative to the manual sb_start_write() and
sb_end_write() pattern, allowing the compiler to automatically handle
the cleanup.

/* Testing */

gcc (Debian 14.2.0-19) 14.2.0
Debian clang version 19.1.7 (3+b1)

No build failures or warnings were observed.

/* Conflicts */

Merge conflicts with mainline
=============================

No known conflicts.

Merge conflicts with other trees
================================

The following changes since commit dcb6fa37fd7bc9c3d2b066329b0d27dedf8becaa:

  Linux 6.18-rc3 (2025-10-26 15:59:49 -0700)

are available in the Git repository at:

  git@...olite.kernel.org:pub/scm/linux/kernel/git/vfs/vfs tags/vfs-6.19-rc1.guards

for you to fetch changes up to 73fd0dba0beb1d2d1695ee5452eac8dfabce3f9e:

  Merge patch series "fs: introduce super write guard" (2025-11-05 22:59:31 +0100)

Please consider pulling these changes from the signed vfs-6.19-rc1.guards tag.

Thanks!
Christian

----------------------------------------------------------------
vfs-6.19-rc1.guards

----------------------------------------------------------------
Christian Brauner (13):
      fs: rename fs_types.h to fs_dirent.h
      fs: add fs/super_types.h header
      fs: add fs/super.h header
      Merge patch series "fs: start to split up fs.h"
      fs: add super_write_guard
      btrfs: use super write guard in btrfs_reclaim_bgs_work()
      btrfs: use super write guard btrfs_run_defrag_inode()
      btrfs: use super write guard in sb_start_write()
      ext4: use super write guard in write_mmp_block()
      btrfs: use super write guard in relocating_repair_kthread()
      open: use super write guard in do_ftruncate()
      xfs: use super write guard in xfs_file_ioctl()
      Merge patch series "fs: introduce super write guard"

Mateusz Guzik (1):
      fs: inline current_umask() and move it to fs_struct.h

 fs/9p/acl.c                               |   1 +
 fs/Makefile                               |   2 +-
 fs/btrfs/block-group.c                    |  10 +-
 fs/btrfs/defrag.c                         |   7 +-
 fs/btrfs/inode.c                          |   1 +
 fs/btrfs/volumes.c                        |   9 +-
 fs/ext4/mmp.c                             |   8 +-
 fs/f2fs/acl.c                             |   1 +
 fs/fat/inode.c                            |   1 +
 fs/{fs_types.c => fs_dirent.c}            |   2 +-
 fs/fs_struct.c                            |   6 -
 fs/hfsplus/options.c                      |   1 +
 fs/hpfs/super.c                           |   1 +
 fs/nilfs2/nilfs.h                         |   1 +
 fs/ntfs3/super.c                          |   1 +
 fs/ocfs2/acl.c                            |   1 +
 fs/omfs/inode.c                           |   1 +
 fs/open.c                                 |   9 +-
 fs/smb/client/file.c                      |   1 +
 fs/smb/client/inode.c                     |   1 +
 fs/smb/client/smb1ops.c                   |   1 +
 fs/xfs/xfs_ioctl.c                        |   6 +-
 include/linux/fs.h                        | 528 +-----------------------------
 include/linux/fs/super.h                  | 238 ++++++++++++++
 include/linux/fs/super_types.h            | 335 +++++++++++++++++++
 include/linux/{fs_types.h => fs_dirent.h} |  11 +-
 include/linux/fs_struct.h                 |   6 +
 include/linux/namei.h                     |   1 +
 28 files changed, 620 insertions(+), 571 deletions(-)
 rename fs/{fs_types.c => fs_dirent.c} (98%)
 create mode 100644 include/linux/fs/super.h
 create mode 100644 include/linux/fs/super_types.h
 rename include/linux/{fs_types.h => fs_dirent.h} (92%)