Commit Graph

569 Commits

Author SHA1 Message Date
Linus Torvalds 32a92f8c89 Convert more 'alloc_obj' cases to default GFP_KERNEL arguments
This converts some of the visually simpler cases that have been split
over multiple lines.  I only did the ones that are easy to verify the
resulting diff by having just that final GFP_KERNEL argument on the next
line.

Somebody should probably do a proper coccinelle script for this, but for
me the trivial script actually resulted in an assertion failure in the
middle of the script.  I probably had made it a bit _too_ trivial.

So after fighting that far a while I decided to just do some of the
syntactically simpler cases with variations of the previous 'sed'
scripts.

The more syntactically complex multi-line cases would mostly really want
whitespace cleanup anyway.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2026-02-21 20:03:00 -08:00
Linus Torvalds bf4afc53b7 Convert 'alloc_obj' family to use the new default GFP_KERNEL argument
This was done entirely with mindless brute force, using

    git grep -l '\<k[vmz]*alloc_objs*(.*, GFP_KERNEL)' |
        xargs sed -i 's/\(alloc_objs*(.*\), GFP_KERNEL)/\1)/'

to convert the new alloc_obj() users that had a simple GFP_KERNEL
argument to just drop that argument.

Note that due to the extreme simplicity of the scripting, any slightly
more complex cases spread over multiple lines would not be triggered:
they definitely exist, but this covers the vast bulk of the cases, and
the resulting diff is also then easier to check automatically.

For the same reason the 'flex' versions will be done as a separate
conversion.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2026-02-21 17:09:51 -08:00
Kees Cook 69050f8d6d treewide: Replace kmalloc with kmalloc_obj for non-scalar types
This is the result of running the Coccinelle script from
scripts/coccinelle/api/kmalloc_objs.cocci. The script is designed to
avoid scalar types (which need careful case-by-case checking), and
instead replace kmalloc-family calls that allocate struct or union
object instances:

Single allocations:	kmalloc(sizeof(TYPE), ...)
are replaced with:	kmalloc_obj(TYPE, ...)

Array allocations:	kmalloc_array(COUNT, sizeof(TYPE), ...)
are replaced with:	kmalloc_objs(TYPE, COUNT, ...)

Flex array allocations:	kmalloc(struct_size(PTR, FAM, COUNT), ...)
are replaced with:	kmalloc_flex(*PTR, FAM, COUNT, ...)

(where TYPE may also be *VAR)

The resulting allocations no longer return "void *", instead returning
"TYPE *".

Signed-off-by: Kees Cook <kees@kernel.org>
2026-02-21 01:02:28 -08:00
Linus Torvalds eeccf287a2 mm.git review status for linus..mm-stable
Total patches:       36
 Reviews/patch:       1.77
 Reviewed rate:       83%
 
 - The 2 patch series "mm/vmscan: fix demotion targets checks in
   reclaim/demotion" from Bing Jiao fixes a couple of issues in the
   demotion code - pages were failed demotion and were finding themselves
   demoted into disallowed nodes.
 
 - The 11 patch series "Remove XA_ZERO from error recovery of dup_mmap()"
   from Liam Howlett fixes a rare mapledtree race and performs a number of
   cleanups.
 
 - The 13 patch series "mm: add bitmap VMA flag helpers and convert all
   mmap_prepare to use them" from Lorenzo Stoakes implements a lot of
   cleanups following on from the conversion of the VMA flags into a
   bitmap.
 
 - The 5 patch series "support batch checking of references and unmapping
   for large folios" from Baolin Wang implements batching to greatly
   improve the performance of reclaiming clean file-backed large folios.
 
 - The 3 patch series "selftests/mm: add memory failure selftests" from
   Miaohe Lin does as claimed.
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Merge tag 'mm-stable-2026-02-18-19-48' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Pull more MM  updates from Andrew Morton:

 - "mm/vmscan: fix demotion targets checks in reclaim/demotion" fixes a
   couple of issues in the demotion code - pages were failed demotion
   and were finding themselves demoted into disallowed nodes (Bing Jiao)

 - "Remove XA_ZERO from error recovery of dup_mmap()" fixes a rare
   mapledtree race and performs a number of cleanups (Liam Howlett)

 - "mm: add bitmap VMA flag helpers and convert all mmap_prepare to use
   them" implements a lot of cleanups following on from the conversion
   of the VMA flags into a bitmap (Lorenzo Stoakes)

 - "support batch checking of references and unmapping for large folios"
   implements batching to greatly improve the performance of reclaiming
   clean file-backed large folios (Baolin Wang)

 - "selftests/mm: add memory failure selftests" does as claimed (Miaohe
   Lin)

* tag 'mm-stable-2026-02-18-19-48' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (36 commits)
  mm/page_alloc: clear page->private in free_pages_prepare()
  selftests/mm: add memory failure dirty pagecache test
  selftests/mm: add memory failure clean pagecache test
  selftests/mm: add memory failure anonymous page test
  mm: rmap: support batched unmapping for file large folios
  arm64: mm: implement the architecture-specific clear_flush_young_ptes()
  arm64: mm: support batch clearing of the young flag for large folios
  arm64: mm: factor out the address and ptep alignment into a new helper
  mm: rmap: support batched checks of the references for large folios
  tools/testing/vma: add VMA userland tests for VMA flag functions
  tools/testing/vma: separate out vma_internal.h into logical headers
  tools/testing/vma: separate VMA userland tests into separate files
  mm: make vm_area_desc utilise vma_flags_t only
  mm: update all remaining mmap_prepare users to use vma_flags_t
  mm: update shmem_[kernel]_file_*() functions to use vma_flags_t
  mm: update secretmem to use VMA flags on mmap_prepare
  mm: update hugetlbfs to use VMA flags on mmap_prepare
  mm: add basic VMA flag operation helper functions
  tools: bitmap: add missing bitmap_[subset(), andnot()]
  mm: add mk_vma_flags() bitmap flag macro helper
  ...
2026-02-18 20:50:32 -08:00
Lorenzo Stoakes 5bd2c0650a mm: update all remaining mmap_prepare users to use vma_flags_t
We will be shortly removing the vm_flags_t field from vm_area_desc so we
need to update all mmap_prepare users to only use the dessc->vma_flags
field.

This patch achieves that and makes all ancillary changes required to make
this possible.

This lays the groundwork for future work to eliminate the use of
vm_flags_t in vm_area_desc altogether and more broadly throughout the
kernel.

While we're here, we take the opportunity to replace VM_REMAP_FLAGS with
VMA_REMAP_FLAGS, the vma_flags_t equivalent.

No functional changes intended.

Link: https://lkml.kernel.org/r/fb1f55323799f09fe6a36865b31550c9ec67c225.1769097829.git.lorenzo.stoakes@oracle.com
Signed-off-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Acked-by: Damien Le Moal <dlemoal@kernel.org>	[zonefs]
Acked-by: "Darrick J. Wong" <djwong@kernel.org>
Acked-by: Pedro Falcato <pfalcato@suse.de>
Cc: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: Barry Song <baohua@kernel.org>
Cc: David Hildenbrand <david@kernel.org>
Cc: Dev Jain <dev.jain@arm.com>
Cc: Jason Gunthorpe <jgg@nvidia.com>
Cc: Liam Howlett <liam.howlett@oracle.com>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Zi Yan <ziy@nvidia.com>
Cc: Jarkko Sakkinen <jarkko@kernel.org>
Cc: Yury Norov <ynorov@nvidia.com>
Cc: Chris Mason <clm@fb.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2026-02-12 15:42:58 -08:00
Linus Torvalds cf559d9011 orangefs: fixes for string handling in orangefs-debugfs.c and xattr.c,
both sent in by Thorsten Blum.
 
 debugfs - replace strcpy with memcpy where the string lengths are known,
           and replace other uses of strcpy with strscpy.
 
 xattr - replace strcpy with strscpy.
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Merge tag 'for-linus-7.0-ofs1' of git://git.kernel.org/pub/scm/linux/kernel/git/hubcap/linux

Pull orangefs updates from Mike Marshall:

 - Fixes for string handling in orangefs-debugfs.c and xattr.c (Thorsten
   Blum)

* tag 'for-linus-7.0-ofs1' of git://git.kernel.org/pub/scm/linux/kernel/git/hubcap/linux:
  fs/orangefs: Replace deprecated strcpy with memcpy + strscpy
  orangefs: Replace deprecated strcpy with strscpy
2026-02-12 08:57:31 -08:00
Linus Torvalds 9e355113f0 vfs-7.0-rc1.misc
Please consider pulling these changes from the signed vfs-7.0-rc1.misc tag.
 
 Thanks!
 Christian
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Merge tag 'vfs-7.0-rc1.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs

Pull misc vfs updates from Christian Brauner:
 "This contains a mix of VFS cleanups, performance improvements, API
  fixes, documentation, and a deprecation notice.

  Scalability and performance:

   - Rework pid allocation to only take pidmap_lock once instead of
     twice during alloc_pid(), improving thread creation/teardown
     throughput by 10-16% depending on false-sharing luck. Pad the
     namespace refcount to reduce false-sharing

   - Track file lock presence via a flag in ->i_opflags instead of
     reading ->i_flctx, avoiding false-sharing with ->i_readcount on
     open/close hot paths. Measured 4-16% improvement on 24-core
     open-in-a-loop benchmarks

   - Use a consume fence in locks_inode_context() to match the
     store-release/load-consume idiom, eliminating a hardware fence on
     some architectures

   - Annotate cdev_lock with __cacheline_aligned_in_smp to prevent
     false-sharing

   - Remove a redundant DCACHE_MANAGED_DENTRY check in
     __follow_mount_rcu() that never fires since the caller already
     verifies it, eliminating a 100% mispredicted branch

   - Fix a 100% mispredicted likely() in devcgroup_inode_permission()
     that became wrong after a prior code reorder

  Bug fixes and correctness:

   - Make insert_inode_locked() wait for inode destruction instead of
     skipping, fixing a corner case where two matching inodes could
     exist in the hash

   - Move f_mode initialization before file_ref_init() in alloc_file()
     to respect the SLAB_TYPESAFE_BY_RCU ordering contract

   - Add a WARN_ON_ONCE guard in try_to_free_buffers() for folios with
     no buffers attached, preventing a null pointer dereference when
     AS_RELEASE_ALWAYS is set but no release_folio op exists

   - Fix select restart_block to store end_time as timespec64, avoiding
     truncation of tv_sec on 32-bit architectures

   - Make dump_inode() use get_kernel_nofault() to safely access inode
     and superblock fields, matching the dump_mapping() pattern

  API modernization:

   - Make posix_acl_to_xattr() allocate the buffer internally since
     every single caller was doing it anyway. Reduces boilerplate and
     unnecessary error checking across ~15 filesystems

   - Replace deprecated simple_strtoul() with kstrtoul() for the
     ihash_entries, dhash_entries, mhash_entries, and mphash_entries
     boot parameters, adding proper error handling

   - Convert chardev code to use guard(mutex) and __free(kfree) cleanup
     patterns

   - Replace min_t() with min() or umin() in VFS code to avoid silently
     truncating unsigned long to unsigned int

   - Gate LOOKUP_RCU assertions behind CONFIG_DEBUG_VFS since callers
     already check the flag

  Deprecation:

   - Begin deprecating legacy BSD process accounting (acct(2)). The
     interface has numerous footguns and better alternatives exist
     (eBPF)

  Documentation:

   - Fix and complete kernel-doc for struct export_operations, removing
     duplicated documentation between ReST and source

   - Fix kernel-doc warnings for __start_dirop() and ilookup5_nowait()

  Testing:

   - Add a kunit test for initramfs cpio handling of entries with
     filesize > PATH_MAX

  Misc:

   - Add missing <linux/init_task.h> include in fs_struct.c"

* tag 'vfs-7.0-rc1.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs: (28 commits)
  posix_acl: make posix_acl_to_xattr() alloc the buffer
  fs: make insert_inode_locked() wait for inode destruction
  initramfs_test: kunit test for cpio.filesize > PATH_MAX
  fs: improve dump_inode() to safely access inode fields
  fs: add <linux/init_task.h> for 'init_fs'
  docs: exportfs: Use source code struct documentation
  fs: move initializing f_mode before file_ref_init()
  exportfs: Complete kernel-doc for struct export_operations
  exportfs: Mark struct export_operations functions at kernel-doc
  exportfs: Fix kernel-doc output for get_name()
  acct(2): begin the deprecation of legacy BSD process accounting
  device_cgroup: remove branch hint after code refactor
  VFS: fix __start_dirop() kernel-doc warnings
  fs: Describe @isnew parameter in ilookup5_nowait()
  fs/namei: Remove redundant DCACHE_MANAGED_DENTRY check in __follow_mount_rcu
  fs: only assert on LOOKUP_RCU when built with CONFIG_DEBUG_VFS
  select: store end_time as timespec64 in restart block
  chardev: Switch to guard(mutex) and __free(kfree)
  namespace: Replace simple_strtoul with kstrtoul to parse boot params
  dcache: Replace simple_strtoul with kstrtoul in set_dhash_entries
  ...
2026-02-09 15:13:05 -08:00
Linus Torvalds aa2a0fcd4c vfs-7.0-rc1.leases
Please consider pulling these changes from the signed vfs-7.0-rc1.leases tag.
 
 Thanks!
 Christian
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Merge tag 'vfs-7.0-rc1.leases' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs

Pull vfs lease updates from Christian Brauner:
 "This contains updates for lease support to require filesystems to
  explicitly opt-in to lease support

  Currently kernel_setlease() falls through to generic_setlease() when a
  a filesystem does not define ->setlease(), silently granting lease
  support to every filesystem regardless of whether it is prepared for
  it.

  This is a poor default: most filesystems never intended to support
  leases, and the silent fallthrough makes it impossible to distinguish
  "supports leases" from "never thought about it".

  This inverts the default. It adds explicit

	.setlease = generic_setlease;

  assignments to every in-tree filesystem that should retain lease
  support, then changes kernel_setlease() to return -EINVAL when
  ->setlease is NULL.

  With the new default in place, simple_nosetlease() is redundant and
  is removed along with all references to it"

* tag 'vfs-7.0-rc1.leases' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs: (25 commits)
  fuse: add setlease file operation
  fs: remove simple_nosetlease()
  filelock: default to returning -EINVAL when ->setlease operation is NULL
  xfs: add setlease file operation
  ufs: add setlease file operation
  udf: add setlease file operation
  tmpfs: add setlease file operation
  squashfs: add setlease file operation
  overlayfs: add setlease file operation
  orangefs: add setlease file operation
  ocfs2: add setlease file operation
  ntfs3: add setlease file operation
  nilfs2: add setlease file operation
  jfs: add setlease file operation
  jffs2: add setlease file operation
  gfs2: add a setlease file operation
  fat: add setlease file operation
  f2fs: add setlease file operation
  exfat: add setlease file operation
  ext4: add setlease file operation
  ...
2026-02-09 11:59:07 -08:00
Thorsten Blum 9e835108a9 fs/orangefs: Replace deprecated strcpy with memcpy + strscpy
strcpy() is deprecated [1] and using strcat() is discouraged. In
orangefs_debugfs_init() and orangefs_client_debug_init(), replace them
with memcpy() since the string lengths are already known. Replace all
other uses of strcpy() with the safer strscpy().

Link: https://www.kernel.org/doc/html/latest/process/deprecated.html#strcpy [1]
Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev>
Signed-off-by: Mike Marshall <hubcap@omnibond.com>
2026-01-19 16:00:59 -05:00
Thorsten Blum 0eb1927502 orangefs: Replace deprecated strcpy with strscpy
strcpy() has been deprecated [1] because it performs no bounds checking
on the destination buffer, which can lead to buffer overflows. Replace
it with the safer strscpy().  No functional changes.

Link: https://www.kernel.org/doc/html/latest/process/deprecated.html#strcpy [1]
Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev>
Signed-off-by: Mike Marshall <hubcap@omnibond.com>
2026-01-19 16:00:51 -05:00
Miklos Szeredi 6cbfdf8947
posix_acl: make posix_acl_to_xattr() alloc the buffer
Without exception all caller do that.  So move the allocation into the
helper.

This reduces boilerplate and removes unnecessary error checking.

Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Link: https://patch.msgid.link/20260115122341.556026-1-mszeredi@redhat.com
Signed-off-by: Christian Brauner <brauner@kernel.org>
2026-01-16 10:51:12 +01:00
Christoph Hellwig 85c871a02b
fs: add support for non-blocking timestamp updates
Currently file_update_time_flags unconditionally returns -EAGAIN if any
timestamp needs to be updated and IOCB_NOWAIT is passed.  This makes
non-blocking direct writes impossible on file systems with granular
enough timestamps.

Pass IOCB_NOWAIT to ->update_time and return -EAGAIN if it could block.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://patch.msgid.link/20260108141934.2052404-9-hch@lst.de
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
2026-01-12 14:01:33 +01:00
Christoph Hellwig 761475268f
fs: refactor ->update_time handling
Pass the type of update (atime vs c/mtime plus version) as an enum
instead of a set of flags that caused all kinds of confusion.
Because inode_update_timestamps now can't return a modified version
of those flags, return the I_DIRTY_* flags needed to persist the
update, which is what the main caller in generic_update_time wants
anyway, and which is suitable for the other callers that only want
to know if an update happened.

The whole update_time path keeps the flags argument, which will be used
to support non-blocking updates soon even if it is unused, and (the
slightly renamed) inode_update_time also gains the possibility to return
a negative errno to support this.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://patch.msgid.link/20260108141934.2052404-6-hch@lst.de
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Christian Brauner <brauner@kernel.org>
2026-01-12 14:01:32 +01:00
Jeff Layton 136b43aa4b
orangefs: add setlease file operation
Add the setlease file_operation to orangefs_file_operations and
orangefs_dir_operations, pointing to generic_setlease.	A future patch
will change the default behavior to reject lease attempts with -EINVAL
when there is no setlease file operation defined. Add generic_setlease
to retain the ability to set leases on this filesystem.

Signed-off-by: Jeff Layton <jlayton@kernel.org>
Link: https://patch.msgid.link/20260108-setlease-6-20-v1-16-ea4dec9b67fa@kernel.org
Acked-by: Al Viro <viro@zeniv.linux.org.uk>
Acked-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Christian Brauner <brauner@kernel.org>
2026-01-12 10:55:47 +01:00
Linus Torvalds 9368f0f941 vfs-6.19-rc1.inode
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Merge tag 'vfs-6.19-rc1.inode' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs

Pull vfs inode updates from Christian Brauner:
 "Features:

   - Hide inode->i_state behind accessors. Open-coded accesses prevent
     asserting they are done correctly. One obvious aspect is locking,
     but significantly more can be checked. For example it can be
     detected when the code is clearing flags which are already missing,
     or is setting flags when it is illegal (e.g., I_FREEING when
     ->i_count > 0)

   - Provide accessors for ->i_state, converts all filesystems using
     coccinelle and manual conversions (btrfs, ceph, smb, f2fs, gfs2,
     overlayfs, nilfs2, xfs), and makes plain ->i_state access fail to
     compile

   - Rework I_NEW handling to operate without fences, simplifying the
     code after the accessor infrastructure is in place

  Cleanups:

   - Move wait_on_inode() from writeback.h to fs.h

   - Spell out fenced ->i_state accesses with explicit smp_wmb/smp_rmb
     for clarity

   - Cosmetic fixes to LRU handling

   - Push list presence check into inode_io_list_del()

   - Touch up predicts in __d_lookup_rcu()

   - ocfs2: retire ocfs2_drop_inode() and I_WILL_FREE usage

   - Assert on ->i_count in iput_final()

   - Assert ->i_lock held in __iget()

  Fixes:

   - Add missing fences to I_NEW handling"

* tag 'vfs-6.19-rc1.inode' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs: (22 commits)
  dcache: touch up predicts in __d_lookup_rcu()
  fs: push list presence check into inode_io_list_del()
  fs: cosmetic fixes to lru handling
  fs: rework I_NEW handling to operate without fences
  fs: make plain ->i_state access fail to compile
  xfs: use the new ->i_state accessors
  nilfs2: use the new ->i_state accessors
  overlayfs: use the new ->i_state accessors
  gfs2: use the new ->i_state accessors
  f2fs: use the new ->i_state accessors
  smb: use the new ->i_state accessors
  ceph: use the new ->i_state accessors
  btrfs: use the new ->i_state accessors
  Manual conversion to use ->i_state accessors of all places not covered by coccinelle
  Coccinelle-based conversion to use ->i_state accessors
  fs: provide accessors for ->i_state
  fs: spell out fenced ->i_state accesses with explicit smp_wmb/smp_rmb
  fs: move wait_on_inode() from writeback.h to fs.h
  fs: add missing fences to I_NEW handling
  ocfs2: retire ocfs2_drop_inode() and I_WILL_FREE usage
  ...
2025-12-01 09:02:34 -08:00
Christoph Hellwig eff094a58d
orangefs: use inode_update_timestamps directly
Orangefs has no i_version handling and __orangefs_setattr already
explicitly marks the inode dirty.  So instead of the using
the flags return value from generic_update_time, just call the
lower level inode_update_timestamps helper directly.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://patch.msgid.link/20251120064859.2911749-7-hch@lst.de
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Christian Brauner <brauner@kernel.org>
2025-11-26 14:50:10 +01:00
Mateusz Guzik b4dbfd8653
Coccinelle-based conversion to use ->i_state accessors
All places were patched by coccinelle with the default expecting that
->i_lock is held, afterwards entries got fixed up by hand to use
unlocked variants as needed.

The script:
@@
expression inode, flags;
@@

- inode->i_state & flags
+ inode_state_read(inode) & flags

@@
expression inode, flags;
@@

- inode->i_state &= ~flags
+ inode_state_clear(inode, flags)

@@
expression inode, flag1, flag2;
@@

- inode->i_state &= ~flag1 & ~flag2
+ inode_state_clear(inode, flag1 | flag2)

@@
expression inode, flags;
@@

- inode->i_state |= flags
+ inode_state_set(inode, flags)

@@
expression inode, flags;
@@

- inode->i_state = flags
+ inode_state_assign(inode, flags)

@@
expression inode, flags;
@@

- flags = inode->i_state
+ flags = inode_state_read(inode)

@@
expression inode, flags;
@@

- READ_ONCE(inode->i_state) & flags
+ inode_state_read(inode) & flags

Signed-off-by: Mateusz Guzik <mjguzik@gmail.com>
Signed-off-by: Christian Brauner <brauner@kernel.org>
2025-10-20 20:22:26 +02:00
Linus Torvalds f2327dc851 orangefs: Two cleanups and a bug fix.
Remove unused type in macro fill_default_sys_attrs
   Zhen Ni <zhen.ni@easystack.cn>
 
 Replace kzalloc + copy_from_user with memdup_user_nul
   Thorsten Blum <thorsten.blum@linux.dev>
 
 fix xattr related buffer overflow...
   A message was forwarded to me from Disclosure <disclosure@aisle.com>
   indicating a problem with a loop condition in our xattr code. When I
   fixed the problem it exposed a related memory leak problem, and I
   fixed that too.
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Merge tag 'for-linus-6.18-ofs1' of git://git.kernel.org/pub/scm/linux/kernel/git/hubcap/linux

Pull orangefs updates from Mike Marshall:
 "Two cleanups and a bug fix:

   - Remove unused type in macro fill_default_sys_attrs (Zhen Ni)

   - Replace kzalloc + copy_from_user with memdup_user_nul (Thorsten Blum)

   - Fix xattr related buffer overflow...

     A message was forwarded to me from Disclosure <disclosure@aisle.com>
     indicating a problem with a loop condition in our xattr code. When
     I fixed the problem it exposed a related memory leak problem, and I
     fixed that too"

* tag 'for-linus-6.18-ofs1' of git://git.kernel.org/pub/scm/linux/kernel/git/hubcap/linux:
  fs/orangefs: Replace kzalloc + copy_from_user with memdup_user_nul
  orangefs: fix xattr related buffer overflow...
  orangefs: Remove unused type in macro fill_default_sys_attrs
2025-10-03 13:59:56 -07:00
Thorsten Blum 11f6bce77e fs/orangefs: Replace kzalloc + copy_from_user with memdup_user_nul
Replace kzalloc() followed by copy_from_user() with memdup_user_nul() to
simplify and improve orangefs_debug_write(). Allocate only 'count' bytes
instead of the maximum size ORANGEFS_MAX_DEBUG_STRING_LEN, and set 'buf'
to NULL to ensure kfree(buf) still works.

No functional changes intended.

Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev>
Signed-off-by: Mike Marshall <hubcap@omnibond.com>
2025-09-30 10:23:24 -04:00
Mike Marshall 025e880759 orangefs: fix xattr related buffer overflow...
Willy Tarreau <w@1wt.eu> forwarded me a message from
Disclosure <disclosure@aisle.com> with the following
warning:

> The helper `xattr_key()` uses the pointer variable in the loop condition
> rather than dereferencing it. As `key` is incremented, it remains non-NULL
> (until it runs into unmapped memory), so the loop does not terminate on
> valid C strings and will walk memory indefinitely, consuming CPU or hanging
> the thread.

I easily reproduced this with setfattr and getfattr, causing a kernel
oops, hung user processes and corrupted orangefs files. Disclosure
sent along a diff (not a patch) with a suggested fix, which I based
this patch on.

After xattr_key started working right, xfstest generic/069 exposed an
xattr related memory leak that lead to OOM. xattr_key returns
a hashed key.  When adding xattrs to the orangefs xattr cache, orangefs
used hash_add, a kernel hashing macro. hash_add also hashes the key using
hash_log which resulted in additions to the xattr cache going to the wrong
hash bucket. generic/069 tortures a single file and orangefs does a
getattr for the xattr "security.capability" every time. Orangefs
negative caches on xattrs which includes a kmalloc. Since adds to the
xattr cache were going to the wrong bucket, every getattr for
"security.capability" resulted in another kmalloc, none of which were
ever freed.

I changed the two uses of hash_add to hlist_add_head instead
and the memory leak ceased and generic/069 quit throwing furniture.

Signed-off-by: Mike Marshall <hubcap@omnibond.com>
Reported-by: Stanislav Fort of Aisle Research <stanislav.fort@aisle.com>
2025-09-30 10:23:20 -04:00
Zhen Ni 3dffadfa99 orangefs: Remove unused type in macro fill_default_sys_attrs
Remove the unused type parameter from the macro definition and all its
callers, making the interface consistent with its actual usage.

Fixes: 69a23de2f3 ("orangefs: clean up fill_default_sys_attrs")
Signed-off-by: Zhen Ni <zhen.ni@easystack.cn>
Signed-off-by: Mike Marshall <hubcap@omnibond.com>
2025-09-30 10:23:03 -04:00
Mateusz Guzik f99b391778
fs: rename generic_delete_inode() and generic_drop_inode()
generic_delete_inode() is rather misleading for what the routine is
doing. inode_just_drop() should be much clearer.

The new naming is inconsistent with generic_drop_inode(), so rename that
one as well with inode_ as the suffix.

No functional changes.

Signed-off-by: Mateusz Guzik <mjguzik@gmail.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Christian Brauner <brauner@kernel.org>
2025-09-15 16:09:42 +02:00
Linus Torvalds ac46ff0f77 orangefs: fixes for string handling in debugfs and sysfs
Change scnprintf to sysfs_emit in sysfs code.
 
 Change sprintf to scnprintf in debugfs code.
 
 Refactor debugfs mask-to-string code for readability and slightly
 improved functionality.
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Merge tag 'for-linus-6.17-ofs1' of git://git.kernel.org/pub/scm/linux/kernel/git/hubcap/linux

Pull orangefs updates from Mike Marshall:
 "Fixes for string handling in debugfs and sysfs:

   - change scnprintf to sysfs_emit in sysfs code.

   - change sprintf to scnprintf in debugfs code.

   - refactor debugfs mask-to-string code for readability and slightly
     improved functionality"

* tag 'for-linus-6.17-ofs1' of git://git.kernel.org/pub/scm/linux/kernel/git/hubcap/linux:
  fs/orangefs: Allow 2 more characters in do_c_string()
  fs: orangefs: replace scnprintf() with sysfs_emit()
  fs/orangefs: use snprintf() instead of sprintf()
2025-07-31 10:22:48 -07:00
Linus Torvalds 57fcb7d930 vfs-6.17-rc1.fileattr
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Merge tag 'vfs-6.17-rc1.fileattr' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs

Pull fileattr updates from Christian Brauner:
 "This introduces the new file_getattr() and file_setattr() system calls
  after lengthy discussions.

  Both system calls serve as successors and extensible companions to
  the FS_IOC_FSGETXATTR and FS_IOC_FSSETXATTR system calls which have
  started to show their age in addition to being named in a way that
  makes it easy to conflate them with extended attribute related
  operations.

  These syscalls allow userspace to set filesystem inode attributes on
  special files. One of the usage examples is the XFS quota projects.

  XFS has project quotas which could be attached to a directory. All new
  inodes in these directories inherit project ID set on parent
  directory.

  The project is created from userspace by opening and calling
  FS_IOC_FSSETXATTR on each inode. This is not possible for special
  files such as FIFO, SOCK, BLK etc. Therefore, some inodes are left
  with empty project ID. Those inodes then are not shown in the quota
  accounting but still exist in the directory. This is not critical but
  in the case when special files are created in the directory with
  already existing project quota, these new inodes inherit extended
  attributes. This creates a mix of special files with and without
  attributes. Moreover, special files with attributes don't have a
  possibility to become clear or change the attributes. This, in turn,
  prevents userspace from re-creating quota project on these existing
  files.

  In addition, these new system calls allow the implementation of
  additional attributes that we couldn't or didn't want to fit into the
  legacy ioctls anymore"

* tag 'vfs-6.17-rc1.fileattr' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs:
  fs: tighten a sanity check in file_attr_to_fileattr()
  tree-wide: s/struct fileattr/struct file_kattr/g
  fs: introduce file_getattr and file_setattr syscalls
  fs: prepare for extending file_get/setattr()
  fs: make vfs_fileattr_[get|set] return -EOPNOTSUPP
  selinux: implement inode_file_[g|s]etattr hooks
  lsm: introduce new hooks for setting/getting inode fsxattr
  fs: split fileattr related helpers into separate file
2025-07-28 15:24:14 -07:00
Linus Torvalds 7031769e10 vfs-6.17-rc1.mmap_prepare
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Merge tag 'vfs-6.17-rc1.mmap_prepare' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs

Pull mmap_prepare updates from Christian Brauner:
 "Last cycle we introduce f_op->mmap_prepare() in c84bf6dd2b ("mm:
  introduce new .mmap_prepare() file callback").

  This is preferred to the existing f_op->mmap() hook as it does require
  a VMA to be established yet, thus allowing the mmap logic to invoke
  this hook far, far earlier, prior to inserting a VMA into the virtual
  address space, or performing any other heavy handed operations.

  This allows for much simpler unwinding on error, and for there to be a
  single attempt at merging a VMA rather than having to possibly
  reattempt a merge based on potentially altered VMA state.

  Far more importantly, it prevents inappropriate manipulation of
  incompletely initialised VMA state, which is something that has been
  the cause of bugs and complexity in the past.

  The intent is to gradually deprecate f_op->mmap, and in that vein this
  series coverts the majority of file systems to using f_op->mmap_prepare.

  Prerequisite steps are taken - firstly ensuring all checks for mmap
  capabilities use the file_has_valid_mmap_hooks() helper rather than
  directly checking for f_op->mmap (which is now not a valid check) and
  secondly updating daxdev_mapping_supported() to not require a VMA
  parameter to allow ext4 and xfs to be converted.

  Commit bb666b7c27 ("mm: add mmap_prepare() compatibility layer for
  nested file systems") handles the nasty edge-case of nested file
  systems like overlayfs, which introduces a compatibility shim to allow
  f_op->mmap_prepare() to be invoked from an f_op->mmap() callback.

  This allows for nested filesystems to continue to function correctly
  with all file systems regardless of which callback is used. Once we
  finally convert all file systems, this shim can be removed.

  As a result, ecryptfs, fuse, and overlayfs remain unaltered so they
  can nest all other file systems.

  We additionally do not update resctl - as this requires an update to
  remap_pfn_range() (or an alternative to it) which we defer to a later
  series, equally we do not update cramfs which needs a mixed mapping
  insertion with the same issue, nor do we update procfs, hugetlbfs,
  syfs or kernfs all of which require VMAs for internal state and hooks.
  We shall return to all of these later"

* tag 'vfs-6.17-rc1.mmap_prepare' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs:
  doc: update porting, vfs documentation to describe mmap_prepare()
  fs: replace mmap hook with .mmap_prepare for simple mappings
  fs: convert most other generic_file_*mmap() users to .mmap_prepare()
  fs: convert simple use of generic_file_*_mmap() to .mmap_prepare()
  mm/filemap: introduce generic_file_*_mmap_prepare() helpers
  fs/xfs: transition from deprecated .mmap hook to .mmap_prepare
  fs/ext4: transition from deprecated .mmap hook to .mmap_prepare
  fs/dax: make it possible to check dev dax support without a VMA
  fs: consistently use can_mmap_file() helper
  mm/nommu: use file_has_valid_mmap_hooks() helper
  mm: rename call_mmap/mmap_prepare to vfs_mmap/mmap_prepare
2025-07-28 13:43:25 -07:00
Linus Torvalds 7879d7aff0 vfs-6.17-rc1.misc
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Merge tag 'vfs-6.17-rc1.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs

Pull misc VFS updates from Christian Brauner:
 "This contains the usual selections of misc updates for this cycle.

  Features:

   - Add ext4 IOCB_DONTCACHE support

     This refactors the address_space_operations write_begin() and
     write_end() callbacks to take const struct kiocb * as their first
     argument, allowing IOCB flags such as IOCB_DONTCACHE to propagate
     to the filesystem's buffered I/O path.

     Ext4 is updated to implement handling of the IOCB_DONTCACHE flag
     and advertises support via the FOP_DONTCACHE file operation flag.

     Additionally, the i915 driver's shmem write paths are updated to
     bypass the legacy write_begin/write_end interface in favor of
     directly calling write_iter() with a constructed synchronous kiocb.
     Another i915 change replaces a manual write loop with
     kernel_write() during GEM shmem object creation.

  Cleanups:

   - don't duplicate vfs_open() in kernel_file_open()

   - proc_fd_getattr(): don't bother with S_ISDIR() check

   - fs/ecryptfs: replace snprintf with sysfs_emit in show function

   - vfs: Remove unnecessary list_for_each_entry_safe() from
     evict_inodes()

   - filelock: add new locks_wake_up_waiter() helper

   - fs: Remove three arguments from block_write_end()

   - VFS: change old_dir and new_dir in struct renamedata to dentrys

   - netfs: Remove unused declaration netfs_queue_write_request()

  Fixes:

   - eventpoll: Fix semi-unbounded recursion

   - eventpoll: fix sphinx documentation build warning

   - fs/read_write: Fix spelling typo

   - fs: annotate data race between poll_schedule_timeout() and
     pollwake()

   - fs/pipe: set FMODE_NOWAIT in create_pipe_files()

   - docs/vfs: update references to i_mutex to i_rwsem

   - fs/buffer: remove comment about hard sectorsize

   - fs/buffer: remove the min and max limit checks in __getblk_slow()

   - fs/libfs: don't assume blocksize <= PAGE_SIZE in
     generic_check_addressable

   - fs_context: fix parameter name in infofc() macro

   - fs: Prevent file descriptor table allocations exceeding INT_MAX"

* tag 'vfs-6.17-rc1.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs: (24 commits)
  netfs: Remove unused declaration netfs_queue_write_request()
  eventpoll: fix sphinx documentation build warning
  ext4: support uncached buffered I/O
  mm/pagemap: add write_begin_get_folio() helper function
  fs: change write_begin/write_end interface to take struct kiocb *
  drm/i915: Refactor shmem_pwrite() to use kiocb and write_iter
  drm/i915: Use kernel_write() in shmem object create
  eventpoll: Fix semi-unbounded recursion
  vfs: Remove unnecessary list_for_each_entry_safe() from evict_inodes()
  fs/libfs: don't assume blocksize <= PAGE_SIZE in generic_check_addressable
  fs/buffer: remove the min and max limit checks in __getblk_slow()
  fs: Prevent file descriptor table allocations exceeding INT_MAX
  fs: Remove three arguments from block_write_end()
  fs/ecryptfs: replace snprintf with sysfs_emit in show function
  fs: annotate suspected data race between poll_schedule_timeout() and pollwake()
  docs/vfs: update references to i_mutex to i_rwsem
  fs/buffer: remove comment about hard sectorsize
  fs_context: fix parameter name in infofc() macro
  VFS: change old_dir and new_dir in struct renamedata to dentrys
  proc_fd_getattr(): don't bother with S_ISDIR() check
  ...
2025-07-28 11:22:56 -07:00
Dan Carpenter 2138e89cb0 fs/orangefs: Allow 2 more characters in do_c_string()
The do_k_string() and do_c_string() functions do essentially the same
thing which is they add a string and a comma onto the end of an existing
string.  At the end, the caller will overwrite the last comma with a
newline.  Later, in orangefs_kernel_debug_init(), we add a newline to
the string.

The change to do_k_string() is just cosmetic.  I moved the "- 1" to
the other side of the comparison and made it "+ 1".  This has no
effect on runtime, I just wanted the functions to match each other
and the rest of the file.

However in do_c_string(), I removed the "- 2" which allows us to print
two extra characters.  I noticed this issue while reviewing the code
and I doubt affects anything in real life.  My guess is that this was
double counting the comma and the newline.  The "+ 1" accounts for
the newline, and the caller will delete the final comma which ensures
there is enough space for the newline.

Removing the "- 2" lets us print 2 more characters, but mainly it makes
the code more consistent and understandable for reviewers.

Fixes: 44f4641073 ("orangefs: clean up debugfs globals")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Signed-off-by: Mike Marshall <hubcap@omnibond.com>
2025-07-22 12:39:29 -04:00
Shankari Anand 313bf5b79e fs: orangefs: replace scnprintf() with sysfs_emit()
Documentation/filesystems/sysfs.rst mentions that show() should only
use sysfs_emit() or sysfs_emit_at() when formating the value to be
returned to user space. So replace scnprintf() with sysfs_emit().

Signed-off-by: Shankari Anand <shankari.ak0208@gmail.com>
Signed-off-by: Mike Marshall <hubcap@omnibond.com>
2025-07-21 11:14:21 -04:00
Amir Mohammad Jahangirzad cdfa130465 fs/orangefs: use snprintf() instead of sprintf()
sprintf() is discouraged for use with bounded destination buffers
as it does not prevent buffer overflows when the formatted output
exceeds the destination buffer size. snprintf() is a safer
alternative as it limits the number of bytes written and ensures
NUL-termination.

Replace sprintf() with snprintf() for copying the debug string
into a temporary buffer, using ORANGEFS_MAX_DEBUG_STRING_LEN as
the maximum size to ensure safe formatting and prevent memory
corruption in edge cases.

EDIT: After this patch sat on linux-next for a few days, Dan
Carpenter saw it and suggested that I use scnprintf instead of
snprintf. I made the change and retested.

Signed-off-by: Amir Mohammad Jahangirzad <a.jahangirzad@gmail.com>
Signed-off-by: Mike Marshall <hubcap@omnibond.com>
2025-07-21 11:12:33 -04:00
Taotao Chen e9d8e2bf23
fs: change write_begin/write_end interface to take struct kiocb *
Change the address_space_operations callbacks write_begin() and
write_end() to take struct kiocb * as the first argument instead of
struct file *.

Update all affected function prototypes, implementations, call sites,
and related documentation across VFS, filesystems, and block layer.

Part of a series refactoring address_space_operations write_begin and
write_end callbacks to use struct kiocb for passing write context and
flags.

Signed-off-by: Taotao Chen <chentaotao@didiglobal.com>
Link: https://lore.kernel.org/20250716093559.217344-4-chentaotao@didiglobal.com
Signed-off-by: Christian Brauner <brauner@kernel.org>
2025-07-16 14:48:18 +02:00
Christian Brauner ca115d7e75
tree-wide: s/struct fileattr/struct file_kattr/g
Now that we expose struct file_attr as our uapi struct rename all the
internal struct to struct file_kattr to clearly communicate that it is a
kernel internal struct. This is similar to struct mount_{k}attr and
others.

Link: https://lore.kernel.org/20250703-restlaufzeit-baurecht-9ed44552b481@brauner
Signed-off-by: Christian Brauner <brauner@kernel.org>
2025-07-04 16:14:39 +02:00
Lorenzo Stoakes 2e3b37a7e4
fs: replace mmap hook with .mmap_prepare for simple mappings
Since commit c84bf6dd2b ("mm: introduce new .mmap_prepare() file
callback"), the f_op->mmap() hook has been deprecated in favour of
f_op->mmap_prepare().

This callback is invoked in the mmap() logic far earlier, so error handling
can be performed more safely without complicated and bug-prone state
unwinding required should an error arise.

This hook also avoids passing a pointer to a not-yet-correctly-established
VMA avoiding any issues with referencing this data structure.

It rather provides a pointer to the new struct vm_area_desc descriptor type
which contains all required state and allows easy setting of required
parameters without any consideration needing to be paid to locking or
reference counts.

Note that nested filesystems like overlayfs are compatible with an
.mmap_prepare() callback since commit bb666b7c27 ("mm: add mmap_prepare()
compatibility layer for nested file systems").

In this patch we apply this change to file systems with relatively simple
mmap() hook logic - exfat, ceph, f2fs, bcachefs, zonefs, btrfs, ocfs2,
orangefs, nilfs2, romfs, ramfs and aio.

Signed-off-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Link: https://lore.kernel.org/f528ac4f35b9378931bd800920fee53fc0c5c74d.1750099179.git.lorenzo.stoakes@oracle.com
Acked-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Viacheslav Dubeyko <Slava.Dubeyko@ibm.com>
Signed-off-by: Christian Brauner <brauner@kernel.org>
2025-06-19 13:56:59 +02:00
Al Viro 05fb0e6664 new helper: set_default_d_op()
... to be used instead of manually assigning to ->s_d_op.
All in-tree filesystem converted (and field itself is renamed,
so any out-of-tree ones in need of conversion will be caught
by compiler).

Reviewed-by: Christian Brauner <brauner@kernel.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2025-06-10 22:21:16 -04:00
Linus Torvalds b04f9f8893 orangefs: Convert to use the new mount API
Code from Eric Sandeen at redhat that converts orangefs over to the new
 mount API.
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Merge tag 'for-linus-6.16-ofs1' of git://git.kernel.org/pub/scm/linux/kernel/git/hubcap/linux

Pull orangefs update from Mike Marshall:
 "Convert to use the new mount API.

  Code from Eric Sandeen at redhat that converts orangefs over to the
  new mount API"

* tag 'for-linus-6.16-ofs1' of git://git.kernel.org/pub/scm/linux/kernel/git/hubcap/linux:
  orangefs: Convert to use the new mount API
2025-05-28 12:05:30 -07:00
Mike Marshall 219bf6edd7 orangefs: adjust counting code to recover from 665575cf
A late commit to 6.14-rc7! broke orangefs. 665575cf seems like a
good change, but maybe should have been introduced during the merge
window. This patch adjusts the counting code associated with
writing out pages so that orangefs works in a 665575cf world.

Signed-off-by: Mike Marshall <hubcap@omnibond.com>
2025-05-20 11:07:00 -04:00
Eric Sandeen 4dc784e92d orangefs: Convert to use the new mount API
Convert the orangefs filesystem to the new internal mount API as the old
one will be obsoleted and removed.  This allows greater flexibility in
communication of mount parameters between userspace, the VFS and the
filesystem.

See Documentation/filesystems/mount_api.txt for more information.

[sandeen: forward-port older patch, fix SB_POSIXACL handling]

Signed-off-by: David Howells <dhowells@redhat.com>
Co-developed-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
cc: Mike Marshall <hubcap@omnibond.com>
cc: Martin Brandenburg <martin@omnibond.com>
cc: devel@lists.orangefs.org
Signed-off-by: Mike Marshall <hubcap@omnibond.com>
2025-05-14 18:04:45 -04:00
Linus Torvalds fde05627a2 orangefs: one fixup
From "Dr. David Alan Gilbert" <linux@treblig.org>
 remove two orangefs bufmap routines that no longer have callers.
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Merge tag 'for-linus-6.15-ofs1' of git://git.kernel.org/pub/scm/linux/kernel/git/hubcap/linux

Pull orangefs update from Mike Marshall:

 - remove two orangefs bufmap routines that no longer have callers

* tag 'for-linus-6.15-ofs1' of git://git.kernel.org/pub/scm/linux/kernel/git/hubcap/linux:
  orangefs: Bufmap deadcoding
2025-03-27 13:14:39 -07:00
Linus Torvalds d41066dd76 vfs-6.15-rc1.orangefs
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Merge tag 'vfs-6.15-rc1.orangefs' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs

Pull vfs orangefs updates from Christian Brauner:
 "This contains the work to remove orangefs_writepage() and partially
  convert it to folios.

  A few regular bugfixes are included as well"

* tag 'vfs-6.15-rc1.orangefs' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs:
  orangefs: Convert orangefs_writepages to contain an array of folios
  orangefs: Simplify bvec setup in orangefs_writepages_work()
  orangefs: Unify error & success paths in orangefs_writepages_work()
  orangefs: Pass mapping to orangefs_writepages_work()
  orangefs: Convert orangefs_writepage_locked() to take a folio
  orangefs: Remove orangefs_writepage()
  orangefs: make open_for_read and open_for_write boolean
  orangefs: Move s_kmod_keyword_mask_map to orangefs-debugfs.c
  orangefs: Do not truncate file size
2025-03-24 13:17:54 -07:00
Dr. David Alan Gilbert 121a83ce6f orangefs: Bufmap deadcoding
orangefs_bufmap_shift_query() last use was removed in 2018 by
commit 9f8fd53cd0 ("orangefs: revamp block sizes")

orangefs_bufmap_page_fill() last use was removed in 2021 by
commit 0c4b7cadd1 ("Orangef: implement orangefs_readahead.")

Remove them.

Signed-off-by: Dr. David Alan Gilbert <linux@treblig.org>
Signed-off-by: Mike Marshall <hubcap@omnibond.com>
2025-03-18 19:39:19 -04:00
Matthew Wilcox (Oracle) 73f233b972
orangefs: Convert orangefs_writepages to contain an array of folios
The pages being passed in are always folios (since they come from the
page cache).  This eliminates several hidden calls to compound_head(),
and uses of legacy APIs.

Signed-off-by: "Matthew Wilcox (Oracle)" <willy@infradead.org>
Link: https://lore.kernel.org/r/20250305204734.1475264-10-willy@infradead.org
Tested-by: Mike Marshall <hubcap@omnibond.com>
Signed-off-by: Christian Brauner <brauner@kernel.org>
2025-03-06 09:26:07 +01:00
Matthew Wilcox (Oracle) 377afd97cf
orangefs: Simplify bvec setup in orangefs_writepages_work()
This produces a bvec which is slightly different as the last page is added
in its entirety rather than only the portion which is being written back.
However we don't use this information anywhere; the iovec has its own
length parameter.

Signed-off-by: "Matthew Wilcox (Oracle)" <willy@infradead.org>
Link: https://lore.kernel.org/r/20250305204734.1475264-9-willy@infradead.org
Tested-by: Mike Marshall <hubcap@omnibond.com>
Signed-off-by: Christian Brauner <brauner@kernel.org>
2025-03-06 09:26:07 +01:00
Matthew Wilcox (Oracle) f9ec21357f
orangefs: Unify error & success paths in orangefs_writepages_work()
Both arms of this conditional now have the same loop, so sink it out
of the conditional.

Signed-off-by: "Matthew Wilcox (Oracle)" <willy@infradead.org>
Link: https://lore.kernel.org/r/20250305204734.1475264-8-willy@infradead.org
Tested-by: Mike Marshall <hubcap@omnibond.com>
Signed-off-by: Christian Brauner <brauner@kernel.org>
2025-03-06 09:26:06 +01:00
Matthew Wilcox (Oracle) 6420f17963
orangefs: Pass mapping to orangefs_writepages_work()
Remove two accesses to page->mapping by passing the mapping from
orangefs_writepages() to orangefs_writepages_callback() and then
orangefs_writepages_work().  That makes it obvious that all folios come
from the same mapping, so we can hoist the call to mapping_set_error()
outside the loop.  While I'm here, switch from write_cache_pages()
to writeback_iter() which removes an indirect function call.

Signed-off-by: "Matthew Wilcox (Oracle)" <willy@infradead.org>
Link: https://lore.kernel.org/r/20250305204734.1475264-7-willy@infradead.org
Tested-by: Mike Marshall <hubcap@omnibond.com>
Signed-off-by: Christian Brauner <brauner@kernel.org>
2025-03-06 09:26:06 +01:00
Matthew Wilcox (Oracle) 40eca026bb
orangefs: Convert orangefs_writepage_locked() to take a folio
Both callers have a folio, pass it in and use it inside
orangefs_writepage_locked().  Removes a few hidden calls to
compound_head() and accesses to page->mapping.

Signed-off-by: "Matthew Wilcox (Oracle)" <willy@infradead.org>
Link: https://lore.kernel.org/r/20250305204734.1475264-6-willy@infradead.org
Tested-by: Mike Marshall <hubcap@omnibond.com>
Signed-off-by: Christian Brauner <brauner@kernel.org>
2025-03-06 09:26:06 +01:00
Matthew Wilcox (Oracle) 506382dbbe
orangefs: Remove orangefs_writepage()
If we add a migrate_folio operation, we can remove orangefs_writepage
(as there is already a writepages operation).  filemap_migrate_folio()
will do fine as struct orangefs_write_range does not need to be adjusted
when the folio is migrated.

Signed-off-by: "Matthew Wilcox (Oracle)" <willy@infradead.org>
Link: https://lore.kernel.org/r/20250305204734.1475264-5-willy@infradead.org
Tested-by: Mike Marshall <hubcap@omnibond.com>
Signed-off-by: Christian Brauner <brauner@kernel.org>
2025-03-06 09:26:06 +01:00
Matthew Wilcox (Oracle) 144fa8ae08
orangefs: make open_for_read and open_for_write boolean
sparse currently warns:

fs/orangefs/file.c:119:32: warning: incorrect type in assignment (different base types)
fs/orangefs/file.c:119:32:    expected int open_for_write
fs/orangefs/file.c:119:32:    got restricted fmode_t

Turning open_for_write and open_for_read into booleans (which is how
they're used) removes this warning.

Signed-off-by: "Matthew Wilcox (Oracle)" <willy@infradead.org>
Link: https://lore.kernel.org/r/20250305204734.1475264-4-willy@infradead.org
Tested-by: Mike Marshall <hubcap@omnibond.com>
Signed-off-by: Christian Brauner <brauner@kernel.org>
2025-03-06 09:26:06 +01:00
Matthew Wilcox (Oracle) 50fb0a7f43
orangefs: Move s_kmod_keyword_mask_map to orangefs-debugfs.c
Attempting to build orangefs with W=1 currently reports errors like:

In file included from ../fs/orangefs/protocol.h:287,
                 from ../fs/orangefs/waitqueue.c:16:
../fs/orangefs/orangefs-debug.h:86:18: error: ‘num_kmod_keyword_mask_map’ defined but not used [-Werror=unused-const-variable=]

Move num_kmod_keyword_mask_map, s_kmod_keyword_mask_map and
struct __keyword_mask_s to orangefs-debugfs.c which is the only file
they're used in.

Signed-off-by: "Matthew Wilcox (Oracle)" <willy@infradead.org>
Link: https://lore.kernel.org/r/20250305204734.1475264-3-willy@infradead.org
Tested-by: Mike Marshall <hubcap@omnibond.com>
Signed-off-by: Christian Brauner <brauner@kernel.org>
2025-03-06 09:26:06 +01:00
Matthew Wilcox (Oracle) 062e809359
orangefs: Do not truncate file size
'len' is used to store the result of i_size_read(), so making 'len'
a size_t results in truncation to 4GiB on 32-bit systems.

Signed-off-by: "Matthew Wilcox (Oracle)" <willy@infradead.org>
Link: https://lore.kernel.org/r/20250305204734.1475264-2-willy@infradead.org
Tested-by: Mike Marshall <hubcap@omnibond.com>
Signed-off-by: Christian Brauner <brauner@kernel.org>
2025-03-06 09:26:06 +01:00
NeilBrown 88d5baf690
Change inode_operations.mkdir to return struct dentry *
Some filesystems, such as NFS, cifs, ceph, and fuse, do not have
complete control of sequencing on the actual filesystem (e.g.  on a
different server) and may find that the inode created for a mkdir
request already exists in the icache and dcache by the time the mkdir
request returns.  For example, if the filesystem is mounted twice the
directory could be visible on the other mount before it is on the
original mount, and a pair of name_to_handle_at(), open_by_handle_at()
calls could instantiate the directory inode with an IS_ROOT() dentry
before the first mkdir returns.

This means that the dentry passed to ->mkdir() may not be the one that
is associated with the inode after the ->mkdir() completes.  Some
callers need to interact with the inode after the ->mkdir completes and
they currently need to perform a lookup in the (rare) case that the
dentry is no longer hashed.

This lookup-after-mkdir requires that the directory remains locked to
avoid races.  Planned future patches to lock the dentry rather than the
directory will mean that this lookup cannot be performed atomically with
the mkdir.

To remove this barrier, this patch changes ->mkdir to return the
resulting dentry if it is different from the one passed in.
Possible returns are:
  NULL - the directory was created and no other dentry was used
  ERR_PTR() - an error occurred
  non-NULL - this other dentry was spliced in

This patch only changes file-systems to return "ERR_PTR(err)" instead of
"err" or equivalent transformations.  Subsequent patches will make
further changes to some file-systems to return a correct dentry.

Not all filesystems reliably result in a positive hashed dentry:

- NFS, cifs, hostfs will sometimes need to perform a lookup of
  the name to get inode information.  Races could result in this
  returning something different. Note that this lookup is
  non-atomic which is what we are trying to avoid.  Placing the
  lookup in filesystem code means it only happens when the filesystem
  has no other option.
- kernfs and tracefs leave the dentry negative and the ->revalidate
  operation ensures that lookup will be called to correctly populate
  the dentry.  This could be fixed but I don't think it is important
  to any of the users of vfs_mkdir() which look at the dentry.

The recommendation to use
    d_drop();d_splice_alias()
is ugly but fits with current practice.  A planned future patch will
change this.

Reviewed-by: Jeff Layton <jlayton@kernel.org>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: NeilBrown <neilb@suse.de>
Link: https://lore.kernel.org/r/20250227013949.536172-2-neilb@suse.de
Signed-off-by: Christian Brauner <brauner@kernel.org>
2025-02-27 20:00:17 +01:00
Linus Torvalds 69b8923f50 orangefs: fix a oob in orangefs_debug_write
I got a syzbot report: slab-out-of-bounds Read in
 orangefs_debug_write... several people suggested fixes,
 I tested Al Viro's suggestion and made this patch.
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Merge tag 'for-linus-6.14-ofs4' of git://git.kernel.org/pub/scm/linux/kernel/git/hubcap/linux

Pull orangefs fix from Mike Marshall:
 "Fix a oob in orangefs_debug_write

  I got a syzbot report: "slab-out-of-bounds Read in orangefs_debug_write"

  Several people suggested fixes, I tested Al Viro's suggestion and made
  this patch"

* tag 'for-linus-6.14-ofs4' of git://git.kernel.org/pub/scm/linux/kernel/git/hubcap/linux:
  orangefs: fix a oob in orangefs_debug_write
2025-01-31 09:40:31 -08:00