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Message-ID: <20251128-vfs-misc-v619-0a57215a07b7@brauner>
Date: Fri, 28 Nov 2025 17:48:13 +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 02/17 for v6.19] vfs misc
Hey Linus,
/* Summary */
This contains the usually miscellaneous vfs changes:
Note that this has the kbuild -fms-extensions support merged in as the
pipe changes depends on it.
Features
- Cheaper MAY_EXEC handling for path lookup. This elides MAY_WRITE
permission checks during path lookup and adds the IOP_FASTPERM_MAY_EXEC
flag so filesystems like btrfs can avoid expensive permission work.
- Hide dentry_cache behind runtime const machinery.
- Add German Maglione as virtiofs co-maintainer.
Cleanups
- Tidy up and inline step_into() and walk_component() for improved code
generation.
- Re-enable IOCB_NOWAIT writes to files. This refactors file timestamp
update logic, fixing a layering bypass in btrfs when updating timestamps
on device files and improving FMODE_NOCMTIME handling in VFS now that
nfsd started using it.
- Path lookup optimizations extracting slowpaths into dedicated routines
and adding branch prediction hints for mntput_no_expire(), fd_install(),
lookup_slow(), and various other hot paths.
- Enable clang's -fms-extensions flag, requiring a JFS rename to avoid
conflicts.
- Remove spurious exports in fs/file_attr.c.
- Stop duplicating union pipe_index declaration. This depends on the
shared kbuild branch that brings in -fms-extensions support which is
merged into this branch.
- Use MD5 library instead of crypto_shash in ecryptfs.
- Use largest_zero_folio() in iomap_dio_zero().
- Replace simple_strtol/strtoul with kstrtoint/kstrtouint in init and
initrd code.
- Various typo fixes.
Fixes
- Fix emergency sync for btrfs. Btrfs requires an explicit sync_fs() call
with wait == 1 to commit super blocks. The emergency sync path never
passed this, leaving btrfs data uncommitted during emergency sync.
- Use local kmap in watch_queue's post_one_notification().
- Add hint prints in sb_set_blocksize() for LBS dependency on THP.
/* 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.misc
for you to fetch changes up to ebf8538979101ef879742dcfaf04b684f5461e12:
MAINTAINERS: add German Maglione as virtiofs co-maintainer (2025-11-27 10:00:09 +0100)
Please consider pulling these changes from the signed vfs-6.19-rc1.misc tag.
Thanks!
Christian
----------------------------------------------------------------
vfs-6.19-rc1.misc
----------------------------------------------------------------
Askar Safin (2):
fs/splice.c: trivial fix: pipes -> pipe's
include/linux/fs.h: trivial fix: regualr -> regular
Baokun Li (1):
bdev: add hint prints in sb_set_blocksize() for LBS dependency on THP
Christian Brauner (6):
Merge patch series "fs: fully sync all fsese even for an emergency sync"
Merge patch "kbuild: Add '-fms-extensions' to areas with dedicated CFLAGS"
Merge branch 'kbuild-6.19.fms.extension'
Merge patch series "cheaper MAY_EXEC handling for path lookup"
Merge patch series "re-enable IOCB_NOWAIT writes to files v2"
Merge patch series "fs: tidy up step_into() & friends before inlining"
Christoph Hellwig (7):
fs: remove spurious exports in fs/file_attr.c
fs: refactor file timestamp update logic
fs: lift the FMODE_NOCMTIME check into file_update_time_flags
fs: export vfs_utimes
btrfs: use vfs_utimes to update file timestamps
btrfs: fix the comment on btrfs_update_time
orangefs: use inode_update_timestamps directly
Davidlohr Bueso (1):
watch_queue: Use local kmap in post_one_notification()
Eric Biggers (1):
ecryptfs: Use MD5 library instead of crypto_shash
Kaushlendra Kumar (1):
init: Replace simple_strtoul() with kstrtouint() in root_delay_setup()
Mateusz Guzik (13):
fs: touch up predicts in putname()
fs: speed up path lookup with cheaper handling of MAY_EXEC
btrfs: utilize IOP_FASTPERM_MAY_EXEC
fs: retire now stale MAY_WRITE predicts in inode_permission()
fs: touch predicts in do_dentry_open()
fs: hide dentry_cache behind runtime const machinery
fs: move fd_install() slowpath into a dedicated routine and provide commentary
fs: touch up predicts in path lookup
fs: move mntput_no_expire() slowpath into a dedicated routine
fs: add predicts based on nd->depth
fs: mark lookup_slow() as noinline
fs: tidy up step_into() & friends before inlining
fs: inline step_into() and walk_component()
Nathan Chancellor (2):
jfs: Rename _inline to avoid conflict with clang's '-fms-extensions'
kbuild: Add '-fms-extensions' to areas with dedicated CFLAGS
Pankaj Raghav (1):
iomap: use largest_zero_folio() in iomap_dio_zero()
Qu Wenruo (2):
fs: do not pass a parameter for sync_inodes_one_sb()
fs: fully sync all fses even for an emergency sync
Rasmus Villemoes (2):
Kbuild: enable -fms-extensions
fs/pipe: stop duplicating union pipe_index declaration
Stefan Hajnoczi (1):
MAINTAINERS: add German Maglione as virtiofs co-maintainer
Thorsten Blum (1):
initrd: Replace simple_strtol with kstrtoint to improve ramdisk_start_setup
MAINTAINERS | 1 +
Makefile | 3 +
arch/arm64/kernel/vdso32/Makefile | 3 +-
arch/loongarch/vdso/Makefile | 2 +-
arch/parisc/boot/compressed/Makefile | 2 +-
arch/powerpc/boot/Makefile | 3 +-
arch/s390/Makefile | 3 +-
arch/s390/purgatory/Makefile | 3 +-
arch/x86/Makefile | 4 +-
arch/x86/boot/compressed/Makefile | 7 +-
block/bdev.c | 19 ++++-
drivers/firmware/efi/libstub/Makefile | 4 +-
fs/btrfs/inode.c | 16 +++-
fs/btrfs/volumes.c | 11 +--
fs/dcache.c | 6 +-
fs/ecryptfs/Kconfig | 2 +-
fs/ecryptfs/crypto.c | 90 +++------------------
fs/ecryptfs/ecryptfs_kernel.h | 13 +---
fs/ecryptfs/inode.c | 7 +-
fs/ecryptfs/keystore.c | 65 +++-------------
fs/ecryptfs/main.c | 7 ++
fs/ecryptfs/super.c | 5 +-
fs/file.c | 35 +++++++--
fs/file_attr.c | 4 -
fs/inode.c | 58 +++++---------
fs/iomap/direct-io.c | 38 ++++-----
fs/jfs/jfs_incore.h | 6 +-
fs/namei.c | 142 +++++++++++++++++++++++++---------
fs/namespace.c | 38 +++++----
fs/open.c | 6 +-
fs/orangefs/inode.c | 4 +-
fs/splice.c | 2 +-
fs/sync.c | 7 +-
fs/utimes.c | 1 +
include/asm-generic/vmlinux.lds.h | 3 +-
include/linux/fs.h | 15 ++--
include/linux/pipe_fs_i.h | 23 ++----
init/do_mounts.c | 3 +-
init/do_mounts_rd.c | 3 +-
kernel/watch_queue.c | 4 +-
scripts/Makefile.extrawarn | 4 +-
41 files changed, 329 insertions(+), 343 deletions(-)
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