Changes in sysctl.c

cdd4dc3aebeab43a72ce0bc2b5bab6f0a80b97a5 - Merge tag 'ntfs-for-7.1-rc1-v2' of git://git.kernel.org/pub/scm/linux/kernel/git/linkinjeon/ntfs

Sat, 18 Apr 2026 01:35:49 +0200

Merge tag 'ntfs-for-7.1-rc1-v2' of git://git.kernel.org/pub/scm/linux/kernel/git/linkinjeon/ntfsPull ntfs resurrection from Namjae Jeon: "Ever since Kari Argillander’s 2022 report [1] regarding the state of the ntfs3 driver, I have spent the last 4 years working to provide full write support and current trends (iomap, no buffer head, folio), enhanced performance, stable maintenance, utility support including fsck for NTFS in Linux. This new implementation is built upon the clean foundation of the original read-only NTFS driver, adding: - Write support: Implemented full write support based on the classic read-only NTFS driver. Added delayed allocation to improve write performance through multi-cluster allocation and reduced fragmentation of the cluster bitmap. - iomap conversion: Switched buffered IO (reads/writes), direct IO, file extent mapping, readpages, and writepages to use iomap. - Remove buffer_head: Completely removed buffer_head usage by converting to folios. As a result, the dependency on CONFIG_BUFFER_HEAD has been removed from Kconfig. - Stability improvements: The new ntfs driver passes 326 xfstests, compared to 273 for ntfs3. All tests passed by ntfs3 are a complete subset of the tests passed by this implementation. Added support for fallocate, idmapped mounts, permissions, and more. xfstests Results report: Total tests run: 787 Passed : 326 Failed : 38 Skipped : 423 Failed tests breakdown: - 34 tests require metadata journaling - 4 other tests: 094: No unwritten extent concept in NTFS on-disk format 563: cgroup v2 aware writeback accounting not supported 631: RENAME_WHITEOUT support required 787: NFS delegation test"Link: https://lore.kernel.org/all/da20d32b-5185-f40b-48b8-2986922d8b25@stargateuniverse.net/ [1][ Let's see if this undead filesystem ends up being of the "Easter miracle" kind, or the "Nosferatu of filesystems" kind... ]* tag 'ntfs-for-7.1-rc1-v2' of git://git.kernel.org/pub/scm/linux/kernel/git/linkinjeon/ntfs: (46 commits) ntfs: remove redundant out-of-bound checks ntfs: add bound checking to ntfs_external_attr_find ntfs: add bound checking to ntfs_attr_find ntfs: fix ignoring unreachable code warnings ntfs: fix inconsistent indenting warnings ntfs: fix variable dereferenced before check warnings ntfs: prefer IS_ERR_OR_NULL() over manual NULL check ntfs: harden ntfs_listxattr against EA entries ntfs: harden ntfs_ea_lookup against malformed EA entries ntfs: check $EA query-length in ntfs_ea_get ntfs: validate WSL EA payload sizes ntfs: fix WSL ea restore condition ntfs: add missing newlines to pr_err() messages ntfs: fix pointer/integer casting warnings ntfs: use ->mft_no instead of ->i_ino in prints ntfs: change mft_no type to u64 ntfs: select FS_IOMAP in Kconfig ntfs: add MODULE_ALIAS_FS ntfs: reduce stack usage in ntfs_write_mft_block() ntfs: fix sysctl table registration and path ... List of files: /linux/fs/ntfs/sysctl.c

a8fde8be9aa8e5f10ef73b59b2ad4fba585ccdc5 - ntfs: fix sysctl table registration and path

Sun, 01 Mar 2026 06:52:16 +0100

ntfs: fix sysctl table registration and pathThe presence of a sentinel (an empty {}) at the end of the ctl_table arraynow causes a "sysctl table check failed" error because the kernel attemptsto validate the null entry as a functional node.Deleted the empty {} from the ntfs_sysctls array to preventthe "procname is null" and "No proc_handler" errors and updated the basepath from "fs" to "fs/ntfs" to ensure the ntfs-debug node is correctlylocated under /proc/sys/fs/ntfs/.Reported-by: Woody Suwalski Signed-off-by: Namjae Jeon List of files: /linux/fs/ntfs/sysctl.c

5218cd102aec7ae8df6af6e681ebb0b6d8e798f4 - ntfs: update misc operations

Fri, 13 Feb 2026 02:49:27 +0100

ntfs: update misc operationsUpdates various miscellaneous operations including collation,debugging, logfile handling, unicode string processing, bdev io helpers,object id system file handling.Acked-by: Christoph Hellwig Signed-off-by: Namjae Jeon List of files: /linux/fs/ntfs/sysctl.c

1e9ea7e04472d4e5e12e58c881eaacfb3e49b669 - Revert "fs: Remove NTFS classic"

Tue, 30 Dec 2025 06:24:16 +0100

Revert "fs: Remove NTFS classic"This reverts commit 7ffa8f3d30236e0ab897c30bdb01224ff1fe1c89.Reverts the removal of the classic read-only ntfs driver toserve as the base for a new read-write ntfs implementation.If we stack changes on top of the revert patch, It will significantlyreduce the diff size, making the review easier.This revert intentionally excludes the restoration of Kconfig andMakefile. The Kconfig and Makefile will be added back in the final patchof this series, enabling the driver only after all features andimprovements have been applied.Acked-by: Christoph Hellwig Signed-off-by: Namjae Jeon List of files: /linux/fs/ntfs/sysctl.c

fe33c0fbed75dd464747c0faaedf94c7d8eb4101 - Merge branch 'master' into mm-hotfixes-stable

Wed, 17 Jan 2024 21:58:28 +0100

Merge branch 'master' into mm-hotfixes-stable List of files: /linux/fs/ntfs/sysctl.c

cf79f291f985662150363b4a93d16f88f12643bc - Merge v6.8-rc1 into drm-misc-fixes

Mon, 22 Jan 2024 09:44:15 +0100

Merge v6.8-rc1 into drm-misc-fixesLet's kickstart the 6.8 fix cycle.Signed-off-by: Maxime Ripard List of files: /linux/fs/ntfs/sysctl.c

a05aea98d4052dcd63d9d379613058e9e86c76d7 - Merge tag 'sysctl-6.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/mcgrof/linux

Thu, 11 Jan 2024 02:44:36 +0100

Merge tag 'sysctl-6.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/mcgrof/linuxPull sysctl updates from Luis Chamberlain: "To help make the move of sysctls out of kernel/sysctl.c not incur a size penalty sysctl has been changed to allow us to not require the sentinel, the final empty element on the sysctl array. Joel Granados has been doing all this work. In the v6.6 kernel we got the major infrastructure changes required to support this. For v6.7 we had all arch/ and drivers/ modified to remove the sentinel. For v6.8-rc1 we get a few more updates for fs/ directory only. The kernel/ directory is left but we'll save that for v6.9-rc1 as those patches are still being reviewed. After that we then can expect also the removal of the no longer needed check for procname == NULL. Let us recap the purpose of this work: - this helps reduce the overall build time size of the kernel and run time memory consumed by the kernel by about ~64 bytes per array - the extra 64-byte penalty is no longer inncurred now when we move sysctls out from kernel/sysctl.c to their own files Thomas Weißschuh also sent a few cleanups, for v6.9-rc1 we expect to see further work by Thomas Weißschuh with the constificatin of the struct ctl_table. Due to Joel Granados's work, and to help bring in new blood, I have suggested for him to become a maintainer and he's accepted. So for v6.9-rc1 I look forward to seeing him sent you a pull request for further sysctl changes. This also removes Iurii Zaikin as a maintainer as he has moved on to other projects and has had no time to help at all"* tag 'sysctl-6.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/mcgrof/linux: sysctl: remove struct ctl_path sysctl: delete unused define SYSCTL_PERM_EMPTY_DIR coda: Remove the now superfluous sentinel elements from ctl_table array sysctl: Remove the now superfluous sentinel elements from ctl_table array fs: Remove the now superfluous sentinel elements from ctl_table array cachefiles: Remove the now superfluous sentinel element from ctl_table array sysclt: Clarify the results of selftest run sysctl: Add a selftest for handling empty dirs sysctl: Fix out of bounds access for empty sysctl registers MAINTAINERS: Add Joel Granados as co-maintainer for proc sysctl MAINTAINERS: remove Iurii Zaikin from proc sysctl List of files: /linux/fs/ntfs/sysctl.c

9d5b9475356635d018b4d22f7e58fce32e2e89a7 - fs: Remove the now superfluous sentinel elements from ctl_table array

Tue, 21 Nov 2023 12:35:12 +0100

fs: Remove the now superfluous sentinel elements from ctl_table arrayThis commit comes at the tail end of a greater effort to remove theempty elements at the end of the ctl_table arrays (sentinels) whichwill reduce the overall build time size of the kernel and run timememory bloat by ~64 bytes per sentinel (further information Link :https://lore.kernel.org/all/ZO5Yx5JFogGi%2FcBo@bombadil.infradead.org/)Remove sentinel elements ctl_table struct. Special attention was placed inmaking sure that an empty directory for fs/verity was created whenCONFIG_FS_VERITY_BUILTIN_SIGNATURES is not defined. In this case we use theregister sysctl call that expects a size.Signed-off-by: Joel Granados Reviewed-by: Jan Kara Reviewed-by: "Darrick J. Wong" Acked-by: Christian Brauner Signed-off-by: Luis Chamberlain List of files: /linux/fs/ntfs/sysctl.c

1ac731c529cd4d6adbce134754b51ff7d822b145 - Merge branch 'next' into for-linus

Thu, 31 Aug 2023 01:06:38 +0200

Merge branch 'next' into for-linusPrepare input updates for 6.6 merge window. List of files: /linux/fs/ntfs/sysctl.c

50501936288d6a29d7ef78f25d00e33240fad45f - Merge tag 'v6.4' into next

Mon, 17 Jul 2023 18:20:46 +0200

Merge tag 'v6.4' into nextSync up with mainline to bring in updates to shared infrastructure. List of files: /linux/fs/ntfs/sysctl.c

e80b500370e71b8cd7dd64be4080cee0a3e5068f - Merge branch 'for-6.5/apple' into for-linus

Tue, 27 Jun 2023 22:37:24 +0200

Merge branch 'for-6.5/apple' into for-linus- improved support for Keychron K8 keyboard (Lasse Brun) List of files: /linux/fs/ntfs/sysctl.c

db6da59cf27b5661ced03754ae0550f8914eda9e - Merge drm/drm-next into drm-misc-next-fixes

Thu, 15 Jun 2023 10:34:19 +0200

Merge drm/drm-next into drm-misc-next-fixesBackmerging to sync drm-misc-next-fixes with drm-misc-next.Signed-off-by: Thomas Zimmermann List of files: /linux/fs/ntfs/sysctl.c

03c601927b673a243c9595e1ecc9e8adfdd02438 - Merge branch 'drm-next' of git://anongit.freedesktop.org/drm/drm into msm-next-lumag-base

Mon, 12 Jun 2023 23:20:40 +0200

Merge branch 'drm-next' of git://anongit.freedesktop.org/drm/drm into msm-next-lumag-baseMerge the drm-next tree to pick up the DRM DSC helpers (merged viadrm-intel-next tree). MSM DSC v1.2 patches depend on these helpers.Signed-off-by: Dmitry Baryshkov List of files: /linux/fs/ntfs/sysctl.c

5c68005083d620b1499fc81926a514d39ae8b88c - Merge tag 'v6.4-rc4' into wpan-next/staging

Tue, 06 Jun 2023 10:42:42 +0200

Merge tag 'v6.4-rc4' into wpan-next/stagingLinux 6.4-rc4 List of files: /linux/fs/ntfs/sysctl.c

9ff17e6bdaa50892dd9bdb1b116cb71b73dd711a - Merge drm/drm-next into drm-intel-gt-next

Mon, 05 Jun 2023 12:10:23 +0200

Merge drm/drm-next into drm-intel-gt-nextFor conflict avoidance we need the following commit: c9a9f18d3ad8 drm/i915/huc: use const struct bus_type pointersSigned-off-by: Tvrtko Ursulin List of files: /linux/fs/ntfs/sysctl.c

9c3a985f88fa4de82bf4bda906095ce6444e9039 - Merge drm/drm-next into drm-intel-next

Wed, 17 May 2023 15:30:24 +0200

Merge drm/drm-next into drm-intel-nextBackmerge to get some hwmon dependencies.Signed-off-by: Rodrigo Vivi List of files: /linux/fs/ntfs/sysctl.c

50282fd57bcd3525c9d81eef58df8718e4337c6d - Merge drm/drm-fixes into drm-misc-fixes

Fri, 12 May 2023 09:47:12 +0200

Merge drm/drm-fixes into drm-misc-fixesLet's bring 6.4-rc1 in drm-misc-fixes to start the new fix cycle.Signed-off-by: Maxime Ripard List of files: /linux/fs/ntfs/sysctl.c

ff32fcca64437f679a2bf1c0a19d5def389a18e2 - Merge drm/drm-next into drm-misc-next

Tue, 09 May 2023 15:03:40 +0200

Merge drm/drm-next into drm-misc-nextStart the 6.5 release cycle.Signed-off-by: Maxime Ripard List of files: /linux/fs/ntfs/sysctl.c

888d3c9f7f3ae44101a3fd76528d3dd6f96e9fd0 - Merge tag 'sysctl-6.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/mcgrof/linux

Fri, 28 Apr 2023 01:52:33 +0200

Merge tag 'sysctl-6.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/mcgrof/linuxPull sysctl updates from Luis Chamberlain: "This only does a few sysctl moves from the kernel/sysctl.c file, the rest of the work has been put towards deprecating two API calls which incur recursion and prevent us from simplifying the registration process / saving memory per move. Most of the changes have been soaking on linux-next since v6.3-rc3. I've slowed down the kernel/sysctl.c moves due to Matthew Wilcox's feedback that we should see if we could *save* memory with these moves instead of incurring more memory. We currently incur more memory since when we move a syctl from kernel/sysclt.c out to its own file we end up having to add a new empty sysctl used to register it. To achieve saving memory we want to allow syctls to be passed without requiring the end element being empty, and just have our registration process rely on ARRAY_SIZE(). Without this, supporting both styles of sysctls would make the sysctl registration pretty brittle, hard to read and maintain as can be seen from Meng Tang's efforts to do just this [0]. Fortunately, in order to use ARRAY_SIZE() for all sysctl registrations also implies doing the work to deprecate two API calls which use recursion in order to support sysctl declarations with subdirectories. And so during this development cycle quite a bit of effort went into this deprecation effort. I've annotated the following two APIs are deprecated and in few kernel releases we should be good to remove them: - register_sysctl_table() - register_sysctl_paths() During this merge window we should be able to deprecate and unexport register_sysctl_paths(), we can probably do that towards the end of this merge window. Deprecating register_sysctl_table() will take a bit more time but this pull request goes with a few example of how to do this. As it turns out each of the conversions to move away from either of these two API calls *also* saves memory. And so long term, all these changes *will* prove to have saved a bit of memory on boot. The way I see it then is if remove a user of one deprecated call, it gives us enough savings to move one kernel/sysctl.c out from the generic arrays as we end up with about the same amount of bytes. Since deprecating register_sysctl_table() and register_sysctl_paths() does not require maintainer coordination except the final unexport you'll see quite a bit of these changes from other pull requests, I've just kept the stragglers after rc3"Link: https://lkml.kernel.org/r/ZAD+cpbrqlc5vmry@bombadil.infradead.org [0]* tag 'sysctl-6.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/mcgrof/linux: (29 commits) fs: fix sysctls.c built mm: compaction: remove incorrect #ifdef checks mm: compaction: move compaction sysctl to its own file mm: memory-failure: Move memory failure sysctls to its own file arm: simplify two-level sysctl registration for ctl_isa_vars ia64: simplify one-level sysctl registration for kdump_ctl_table utsname: simplify one-level sysctl registration for uts_kern_table ntfs: simplfy one-level sysctl registration for ntfs_sysctls coda: simplify one-level sysctl registration for coda_table fs/cachefiles: simplify one-level sysctl registration for cachefiles_sysctls xfs: simplify two-level sysctl registration for xfs_table nfs: simplify two-level sysctl registration for nfs_cb_sysctls nfs: simplify two-level sysctl registration for nfs4_cb_sysctls lockd: simplify two-level sysctl registration for nlm_sysctls proc_sysctl: enhance documentation xen: simplify sysctl registration for balloon md: simplify sysctl registration hv: simplify sysctl registration scsi: simplify sysctl registration with register_sysctl() csky: simplify alignment sysctl registration ... List of files: /linux/fs/ntfs/sysctl.c

02148ff371b276d664780de6d1f52d52074c3e25 - ntfs: simplfy one-level sysctl registration for ntfs_sysctls

Fri, 10 Mar 2023 22:49:40 +0100

ntfs: simplfy one-level sysctl registration for ntfs_sysctlsThere is no need to declare an extra tables to just create directory,this can be easily be done with a prefix path with register_sysctl().Simplify this registration.Signed-off-by: Luis Chamberlain List of files: /linux/fs/ntfs/sysctl.c