Commit 42023dd0a294 for kernel
commit 42023dd0a294d8b5c05127dcf95987b70c2fb271
Merge: 4e1b4fdf6113 8534eb11ac05
Author: Linus Torvalds <torvalds@linux-foundation.org>
Date: Sun Oct 25 15:54:05 2026 -1000
Merge tag 'exfat-for-7.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/linkinjeon/exfat
Pull exfat updates from Namjae Jeon:
- Use the recalculated append position when advancing valid_size, dirty
all pages involved in valid-data extension, and zero invalid tails on
partial overwrites. Write-protect the folio spanning the old EOF and
zero its post-EOF range when extending a file, ensuring subsequent
mmap writes advance valid_size.
- Make valid_size and zeroed_size atomic to prevent torn reads and lost
updates. Hold the invalidate lock during truncation, and drain
in-flight direct I/O before buffered writes, buffered fallback, and
page-cache operations that extend valid_size.
- Fall back to single-cluster allocation when a buffered write cannot
allocate its entire range, allowing writes to consume the remaining
free space and return a short count.
- Free clusters allocated beyond EOF after failed or short writes to
prevent leaked space and spurious ENOSPC errors on later writes or
file extensions.
- Clean block-device buffer aliases when allocating clusters so delayed
directory metadata writeback cannot overwrite file data after cluster
reuse.
- Update used_clusters as each cluster is allocated so
partial-allocation cleanup keeps free-space accounting consistent.
Acquire bitmap_lock before checking available space to serialize the
check with allocation.
- Use swap-specific iomap operations to report allocated extents beyond
valid_size as unwritten during swap activation, retaining
byte-accurate SEEK_HOLE and SEEK_DATA reporting in regular I/O.
- Check allocation flags, vendor GUIDs, cluster numbers, data lengths,
and contiguous extents in Vendor Allocation directory entries. Read
complete entry sets during lookup so malformed trailing entries
cannot bypass validation.
- Follow directory FAT chains to their actual end when the recorded
size is too small, supporting devices that leave directory sizes
stale. Handle reads after seeking past the directory end.
- Clear the volume dirty flag during remount only when switching to
read-only without SB_FORCE. Update percent_in_use when changing
volume flags, reporting unknown usage while the volume is dirty or
persistent flags prevent marking it clean.
- Replace runtime division by powers of two with bit operations.
- Document supported mount options, and exfatprogs, and add the
documentation path to MAINTAINERS.
* tag 'exfat-for-7.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/linkinjeon/exfat:
exfat: fix reading a directory whose FAT chain is longer than its size
exfat: free clusters beyond EOF when a write fails or is short
exfat: clean stale bdev buffers of newly allocated clusters
exfat: mark straddling folio RO and zero the post-EOF range
exfat: fix a large buffered write failing when the volume is nearly full
exfat: zero invalid tail on partial overwrites
exfat: drain in-flight DIO before buffered writes
exfat: make valid_size and zeroed_size atomic
exfat: dirty all new pages when extending valid_size
exfat: hold the invalidate lock while truncating
exfat: advance valid_size to EOF for append writes
MAINTAINERS: add exFAT documentation
exfat: remove runtime integer division
exfat: update percent_in_use field when updating volume flags
exfat: clear the volume dirty flag only when remounting read-only
exfat: doc: add documentation
exfat: validate vendor allocation directory entries
exfat: take bitmap_lock at the start of exfat_alloc_cluster()
exfat: fix used_clusters accounting during cluster allocation
exfat: map allocated extents for swap activation