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Linus Torvalds
12392d40a3
Pull ntfs updates from Namjae Jeon:
"New features:
- Implement ioctls to list, read, write, and remove named streams on
files and directories. Provide optional file:stream pathname access
through streams_interface=windows, exposing streams as regular file
descriptors with support for mmap, locking, truncation, and
allocation.
- Support file attribute queries and updates through FS_IOC_GETFLAGS
and FS_IOC_SETFLAGS. Store immutable, append-only, nodump, and
noatime settings in the private $LINUXFLAGS extended attribute and
restore them when loading inodes. Also report compression,
encryption, and the mount-wide case-folding policy as read-only
attributes.
Other changes:
- Expose the existing NTFS volume serial number through FS_IOC_GETFSUUID
by registering it as an eight-byte filesystem identifier.
- Validate MFT I/O geometry and write MFT records and mirror data
through mapped I/O units, keeping neighboring records intact when
multiple records share a native 4Kn block. Track folio writeback
until all BIOs complete, serialize raw record updates against
writeback, and use the caller's requested completion mode.
- Discard stale uninitialized cache data before extending initialized
size, ensure shared mmap writes update initialized size after
native 4Kn size extension, and synchronize attribute inode sizes
after internal resizes. Keep VFS and NTFS sizes consistent when
write-error rollback fails and record the volume error.
- Wait for existing folio writeback before updating attribute data,
require page alignment for full-page write optimizations, and
include the final partial cluster in synchronous writes. Skip
duplicate VFS page-cache truncation under the MFT record lock to
avoid a truncate and writeback deadlock.
- Restart allocation zone searches after failed hints and prevent
contiguous allocation requests from returning additional disjoint
runs that callers leave uninitialized. Allow fallocate after
MFT-zone exhaustion and interrupt allocation loops only for fatal
signals, avoiding spurious interruptions from io_uring task-work
notifications.
- Wait for the initial bitmap scan before extending the MFT bitmap,
bound direct allocation candidates by the volume size, update
free-space accounting, and undo only newly allocated clusters after
run coalescing. Update attribute-list inode size before reserving
additional space.
- Hold runlist locks while expanding non-resident attributes, balance
locks during MFT extension error handling, and avoid pointers
invalidated by runlist reallocation. Keep source runlists available
for rollback and allocate enough room for runlist markers and
terminators.
- Return errors for unmappable runlist fragments instead of treating
them as holes or delayed allocation. Check non-resident attribute
sizes against their allocation and fail mounts when $MFT needs
extent records outside the decoded runlist to describe itself,
preventing silent zero reads and mount hangs.
- Load and validate $BadClus:$Bad at mount time and reserve known bad
clusters before the free-space scan. Fall back to read-only
operation when bad-cluster metadata cannot be validated and prevent
subsequent read-write remounts.
- Serialize volume flag updates and retain the dirty bit after
metadata changes while the volume remains mounted read-write.
Persist recorded errors after final metadata commits, fail ordinary
read-only remounts on sync, commit, or flush errors, and retain the
dirty bit on forced remounts.
- Flush the device write cache when syncing directories and report
flush failures from both file and directory fsync. Drain in-flight
direct I/O before buffered write fallback and keep nonblocking
requests from entering the blocking fallback path.
- Mount hibernated volumes, or volumes whose hibernation state cannot
be determined, read-only regardless of the errors= policy. Prevent
mount-time and dirty-state updates from modifying hibernated
volumes.
- Validate complete EA chains, link zero-terminated tails when
appending entries, retain the EA presence flag, and distinguish
empty values from removal. Propagate lookup, write, and truncate
errors, restore both EA attributes after failed updates, and shut
down the volume if restoration fails.
- Restore the previous ACL xattr when a subsequent WSL mode update
fails, including replacement and removal cases. Record rollback
failures so an unsuccessful permission change cannot silently leave
inconsistent ACL and mode state.
- Apply MST fixups to individual index blocks on large-page systems
and use fixed 512-byte VCN units when an index block is smaller
than its cluster. Support lookup and removal of POSIX names
containing Windows-invalid characters and identify directory
symlinks and junctions during enumeration.
- Report the stored creation time for symbolic links through statx()
when querying the link itself with AT_SYMLINK_NOFOLLOW.
- Use wider decompression offsets to avoid overflow on 64 KB pages,
accept the standard sparse compression unit, and require the
compressed-size field only on the first attribute extent. Block
direct reads and skip readahead for encrypted files to prevent
returning raw ciphertext.
- Validate index entry offsets, logfile update sequence array counts,
attribute-list sizes, and index collation key lengths to prevent
out-of-bounds accesses, NULL pointer dereferences, and excessive
allocations from corrupt volume metadata.
- Derive FITRIM bitmap indexes from the page size and retain the full
64-bit minimum discard length. Balance highmem mappings in logfile
and MFT mirror checks and propagate specific errors from extent,
attribute, and reparse operations.
- Compare streams_interface with the mounted volume's setting during
remount, make named-stream UAPI padding explicit, document stream
access and Linux file attributes, and add the NTFS UAPI header to
MAINTAINERS"
* tag 'ntfs-for-7.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/linkinjeon/ntfs: (93 commits)
ntfs: handle a failed size rollback in the write error path
ntfs: fix u16 truncation of the update sequence array count check
ntfs: reject index blocks with a too small entries offset
ntfs: support persistent noatime attribute
ntfs: roll back the ACL xattr commit when the WSL mode update fails
ntfs: report birth time for symbolic links
ntfs: support FS_IOC_GETFSUUID
ntfs: avoid unnecessary padding in uapi structure
ntfs: flush the block device when syncing a directory
ntfs: report block device flush failures from fsync
ntfs: fix NULL dereference on index allocation open failure
ntfs: compare streams_interface with mounted volume on remount
ntfs: widen the sub-block offsets in ntfs_decompress()
ntfs: reject direct I/O reads of encrypted files
ntfs: do not read ahead encrypted files
ntfs: persist nodump in the $LINUXFLAGS EA
ntfs: persist append-only in the $LINUXFLAGS EA
ntfs: persist immutable in the $LINUXFLAGS EA
ntfs: add fileattr query support
ntfs: restore EA attributes when an update fails
...