Pull vfs fixes from Christian Brauner:

 - For some reason we went from zero to three maintainers for HFS/HFS+
   in a matter of days. The lesson to learn from this might just be that
   we need to threaten code removal more often!?

 - Fix a regression introduced by enabling large folios for lage logical
   block sizes. This has caused issues for noref migration with large
   folios due to sleeping while in an atomic context.

   New sleeping variants of pagecache lookup helpers are introduced.
   These helpers take the folio lock instead of the mapping's private
   spinlock. The problematic users are converted to the sleeping
   variants and serialize against noref migration. Atomic users will
   bail on seeing the new BH_Migrate flag.

   This also shrinks the critical region of the mapping's private lock
   and the new blocking callers reduce contention on the spinlock for
   bdev mappings.

 - Fix two bugs in do_move_mount() when with MOVE_MOUNT_BENEATH. The
   first bug is using a mountpoint that is located on a mount we're not
   holding a reference to. The second bug is putting the mountpoint
   after we've called namespace_unlock() as it's no longer guaranteed
   that it does stay a mountpoint.

 - Remove a pointless call to vfs_getattr_nosec() in the devtmpfs code
   just to query i_mode instead of simply querying the inode directly.
   This also avoids lifetime issues for the dm code by an earlier bugfix
   this cycle that moved bdev_statx() handling into vfs_getattr_nosec().

 - Fix AT_FDCWD handling with getname_maybe_null() in the xattr code.

 - Fix a performance regression for files when multiple callers issue a
   close when it's not the last reference.

 - Remove a duplicate noinline annotation from pipe_clear_nowait().

* tag 'vfs-6.15-rc4.fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs:
  fs/xattr: Fix handling of AT_FDCWD in setxattrat(2) and getxattrat(2)
  MAINTAINERS: hfs/hfsplus: add myself as maintainer
  splice: remove duplicate noinline from pipe_clear_nowait
  devtmpfs: don't use vfs_getattr_nosec to query i_mode
  fix a couple of races in MNT_TREE_BENEATH handling by do_move_mount()
  fs: fall back to file_ref_put() for non-last reference
  mm/migrate: fix sleep in atomic for large folios and buffer heads
  fs/ext4: use sleeping version of sb_find_get_block()
  fs/jbd2: use sleeping version of __find_get_block()
  fs/ocfs2: use sleeping version of __find_get_block()
  fs/buffer: use sleeping version of __find_get_block()
  fs/buffer: introduce sleeping flavors for pagecache lookups
  MAINTAINERS: add HFS/HFS+ maintainers
  fs/buffer: split locking for pagecache lookups

Pull ceph fixes from Ilya Dryomov:
 "A small CephFS encryption-related fix and a dead code cleanup"

* tag 'ceph-for-6.15-rc4' of https://github.com/ceph/ceph-client:
  ceph: Fix incorrect flush end position calculation
  ceph: Remove osd_client deadcode

Pull xfs fixes from Carlos Maiolino:
 "This contains a fix for a build failure on some 32-bit architectures
  and a warning generating docs"

* tag 'xfs-fixes-6.15-rc4' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux:
  xfs: remove duplicate Zoned Filesystems sections in admin-guide
  XFS: fix zoned gc threshold math for 32-bit arches

Pull bcachefs fixes from Kent Overstreet:

 - Case insensitive directories now work

 - Ciemap now correctly reports on unwritten pagecache data

 - bcachefs tools 1.25.1 was incorrectly picking unaligned bucket sizes;
   fix journal and write path bugs this uncovered

And assorted smaller fixes...

* tag 'bcachefs-2025-04-24' of git://evilpiepirate.org/bcachefs: (24 commits)
  bcachefs: Rework fiemap transaction restart handling
  bcachefs: add fiemap delalloc extent detection
  bcachefs: refactor fiemap processing into extent helper and struct
  bcachefs: track current fiemap offset in start variable
  bcachefs: drop duplicate fiemap sync flag
  bcachefs: Fix btree_iter_peek_prev() at end of inode
  bcachefs: Make btree_iter_peek_prev() assert more precise
  bcachefs: Unit test fixes
  bcachefs: Print mount opts earlier
  bcachefs: unlink: casefold d_invalidate
  bcachefs: Fix casefold lookups
  bcachefs: Casefold is now a regular opts.h option
  bcachefs: Implement fileattr_(get|set)
  bcachefs: Allocator now copes with unaligned buckets
  bcachefs: Start copygc, rebalance threads earlier
  bcachefs: Refactor bch2_run_recovery_passes()
  bcachefs: bch2_copygc_wakeup()
  bcachefs: Fix ref leak in write_super()
  bcachefs: Change __journal_entry_close() assert to ERO
  bcachefs: Ensure journal space is block size aligned
  ...

Currently, setxattrat(2) and getxattrat(2) are wrongly handling the
calls of the from setxattrat(AF_FDCWD, NULL, AT_EMPTY_PATH, ...) and
fail with -EBADF error instead of operating on CWD. Fix it.

Fixes: 6140be90ec70 ("fs/xattr: add *at family syscalls")
Signed-off-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/20250424132246.16822-2-jack@suse.cz
Signed-off-by: Christian Brauner <brauner@kernel.org>

pipe_clear_nowait has two noinline macros, but we only need one.

I checked the whole tree, and this is the only occurrence:

$ grep -r "noinline .* noinline"
fs/splice.c:static noinline void noinline pipe_clear_nowait(struct file *file)
$

Fixes: 0f99fc513ddd ("splice: clear FMODE_NOWAIT on file if splice/vmsplice is used")
Signed-off-by: "T.J. Mercier" <tjmercier@google.com>
Link: https://lore.kernel.org/20250423180025.2627670-1-tjmercier@google.com
Reviewed-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Christian Brauner <brauner@kernel.org>

Restart handling in the previous patch was incorrect, so: move btree
operations into a separate helper, and run it with a lockrestart_do().

Additionally, clarify whether pagecache or the btree takes precedence.

Right now, the btree takes precedence: this is incorrect, but it's
needed to pass fstests. Add a giant comment explaining why.

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

bcachefs currently populates fiemap data from the extents btree.
This works correctly when the fiemap sync flag is provided, but if
not, it skips all delalloc extents that have not yet been flushed.
This is because delalloc extents from buffered writes are first
stored as reservation in the pagecache, and only become resident in
the extents btree after writeback completes.

Update the fiemap implementation to process holes between extents by
scanning pagecache for data, via seek data/hole. If a valid data
range is found over a hole in the extent btree, fake up an extent
key and flag the extent as delalloc for reporting to userspace.

Note that this does not necessarily change behavior for the case
where there is dirty pagecache over already written extents, where
when in COW mode, writeback will allocate new blocks for the
underlying ranges. The existing behavior is consistent with btrfs
and it is recommended to use the sync flag for the most up to date
extent state from fiemap.

Signed-off-by: Brian Foster <bfoster@redhat.com>

The bulk of the loop in bch2_fiemap() involves processing the
current extent key from the iter, including following indirections
and trimming the extent size and such. This patch makes a few
changes to reduce the size of the loop and facilitate future changes
to support delalloc extents.

Define a new bch_fiemap_extent structure to wrap the bkey buffer
that holds the extent key to report to userspace along with
associated fiemap flags. Update bch2_fill_extent() to take the
bch_fiemap_extent as a param instead of the individual fields.
Finally, lift the bulk of the extent processing into a
bch2_fiemap_extent() helper that takes the current key and formats
the bch_fiemap_extent appropriately for the fill function.

No functional changes intended by this patch.

Signed-off-by: Brian Foster <bfoster@redhat.com>

Signed-off-by: Brian Foster <bfoster@redhat.com>