Commit Graph

775 Commits

Author SHA1 Message Date
Linus Torvalds
c6b0271053 \n
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Merge tag 'fs_for_v6.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs

Pull misc filesystem updates from Jan Kara:

 - Rewrite kmap_local() handling in ext2

 - Convert ext2 direct IO path to iomap (with some infrastructure tweaks
   associated with that)

 - Convert two boilerplate licenses in udf to SPDX identifiers

 - Other small udf, ext2, and quota fixes and cleanups

* tag 'fs_for_v6.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs:
  udf: Fix uninitialized array access for some pathnames
  ext2: Drop fragment support
  quota: fix warning in dqgrab()
  quota: Properly disable quotas when add_dquot_ref() fails
  fs: udf: udftime: Replace LGPL boilerplate with SPDX identifier
  fs: udf: Replace GPL 2.0 boilerplate license notice with SPDX identifier
  fs: Drop wait_unfrozen wait queue
  ext2_find_entry()/ext2_dotdot(): callers don't need page_addr anymore
  ext2_{set_link,delete_entry}(): don't bother with page_addr
  ext2_put_page(): accept any pointer within the page
  ext2_get_page(): saner type
  ext2: use offset_in_page() instead of open-coding it as subtraction
  ext2_rename(): set_link and delete_entry may fail
  ext2: Add direct-io trace points
  ext2: Move direct-io to use iomap
  ext2: Use generic_buffers_fsync() implementation
  ext4: Use generic_buffers_fsync_noflush() implementation
  fs/buffer.c: Add generic_buffers_fsync*() implementation
  ext2/dax: Fix ext2_setsize when len is page aligned
2023-06-29 13:39:51 -07:00
Linus Torvalds
3eccc0c886 for-6.5/splice-2023-06-23
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Merge tag 'for-6.5/splice-2023-06-23' of git://git.kernel.dk/linux

Pull splice updates from Jens Axboe:
 "This kills off ITER_PIPE to avoid a race between truncate,
  iov_iter_revert() on the pipe and an as-yet incomplete DMA to a bio
  with unpinned/unref'ed pages from an O_DIRECT splice read. This causes
  memory corruption.

  Instead, we either use (a) filemap_splice_read(), which invokes the
  buffered file reading code and splices from the pagecache into the
  pipe; (b) copy_splice_read(), which bulk-allocates a buffer, reads
  into it and then pushes the filled pages into the pipe; or (c) handle
  it in filesystem-specific code.

  Summary:

   - Rename direct_splice_read() to copy_splice_read()

   - Simplify the calculations for the number of pages to be reclaimed
     in copy_splice_read()

   - Turn do_splice_to() into a helper, vfs_splice_read(), so that it
     can be used by overlayfs and coda to perform the checks on the
     lower fs

   - Make vfs_splice_read() jump to copy_splice_read() to handle
     direct-I/O and DAX

   - Provide shmem with its own splice_read to handle non-existent pages
     in the pagecache. We don't want a ->read_folio() as we don't want
     to populate holes, but filemap_get_pages() requires it

   - Provide overlayfs with its own splice_read to call down to a lower
     layer as overlayfs doesn't provide ->read_folio()

   - Provide coda with its own splice_read to call down to a lower layer
     as coda doesn't provide ->read_folio()

   - Direct ->splice_read to copy_splice_read() in tty, procfs, kernfs
     and random files as they just copy to the output buffer and don't
     splice pages

   - Provide wrappers for afs, ceph, ecryptfs, ext4, f2fs, nfs, ntfs3,
     ocfs2, orangefs, xfs and zonefs to do locking and/or revalidation

   - Make cifs use filemap_splice_read()

   - Replace pointers to generic_file_splice_read() with pointers to
     filemap_splice_read() as DIO and DAX are handled in the caller;
     filesystems can still provide their own alternate ->splice_read()
     op

   - Remove generic_file_splice_read()

   - Remove ITER_PIPE and its paraphernalia as generic_file_splice_read
     was the only user"

* tag 'for-6.5/splice-2023-06-23' of git://git.kernel.dk/linux: (31 commits)
  splice: kdoc for filemap_splice_read() and copy_splice_read()
  iov_iter: Kill ITER_PIPE
  splice: Remove generic_file_splice_read()
  splice: Use filemap_splice_read() instead of generic_file_splice_read()
  cifs: Use filemap_splice_read()
  trace: Convert trace/seq to use copy_splice_read()
  zonefs: Provide a splice-read wrapper
  xfs: Provide a splice-read wrapper
  orangefs: Provide a splice-read wrapper
  ocfs2: Provide a splice-read wrapper
  ntfs3: Provide a splice-read wrapper
  nfs: Provide a splice-read wrapper
  f2fs: Provide a splice-read wrapper
  ext4: Provide a splice-read wrapper
  ecryptfs: Provide a splice-read wrapper
  ceph: Provide a splice-read wrapper
  afs: Provide a splice-read wrapper
  9p: Add splice_read wrapper
  net: Make sock_splice_read() use copy_splice_read() by default
  tty, proc, kernfs, random: Use copy_splice_read()
  ...
2023-06-26 11:52:12 -07:00
Jan Kara
028f6055c9 udf: Fix uninitialized array access for some pathnames
For filenames that begin with . and are between 2 and 5 characters long,
UDF charset conversion code would read uninitialized memory in the
output buffer. The only practical impact is that the name may be prepended a
"unification hash" when it is not actually needed but still it is good
to fix this.

Reported-by: syzbot+cd311b1e43cc25f90d18@syzkaller.appspotmail.com
Link: https://lore.kernel.org/all/000000000000e2638a05fe9dc8f9@google.com
Signed-off-by: Jan Kara <jack@suse.cz>
2023-06-21 11:53:06 +02:00
Jan Kara
7517ce5dc4
Revert "udf: Protect rename against modification of moved directory"
This reverts commit f950fd0529. The
locking is going to be provided by vfs_rename() in the following
patches.

CC: stable@vger.kernel.org
Signed-off-by: Jan Kara <jack@suse.cz>
Message-Id: <20230601105830.13168-2-jack@suse.cz>
Signed-off-by: Christian Brauner <brauner@kernel.org>
2023-06-02 14:55:32 +02:00
Bagas Sanjaya
aac2fa2013 fs: udf: udftime: Replace LGPL boilerplate with SPDX identifier
Replace license boilerplate in udftime.c with SPDX identifier for
LGPL-2.0.

Cc: Paul Eggert <eggert@twinsun.com>
Cc: Richard Fontana <rfontana@redhat.com>
Cc: Pali Rohár <pali@kernel.org>
Signed-off-by: Bagas Sanjaya <bagasdotme@gmail.com>
Reviewed-by: Jilayne Lovejoy <opensource@jilayne.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Message-Id: <20230522005434.22133-3-bagasdotme@gmail.com>
2023-05-30 15:40:20 +02:00
Bagas Sanjaya
5ce345541e fs: udf: Replace GPL 2.0 boilerplate license notice with SPDX identifier
The notice refers to full GPL 2.0 text on now defunct MIT FTP site [1].
Replace it with appropriate SPDX license identifier.

Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Pali Rohár <pali@kernel.org>
Link: https://web.archive.org/web/20020809115410/ftp://prep.ai.mit.edu/pub/gnu/GPL [1]
Signed-off-by: Bagas Sanjaya <bagasdotme@gmail.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Message-Id: <20230522005434.22133-2-bagasdotme@gmail.com>
2023-05-30 15:39:13 +02:00
David Howells
2cb1e08985 splice: Use filemap_splice_read() instead of generic_file_splice_read()
Replace pointers to generic_file_splice_read() with calls to
filemap_splice_read().

Signed-off-by: David Howells <dhowells@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Christian Brauner <brauner@kernel.org>
cc: Jens Axboe <axboe@kernel.dk>
cc: Al Viro <viro@zeniv.linux.org.uk>
cc: David Hildenbrand <david@redhat.com>
cc: John Hubbard <jhubbard@nvidia.com>
cc: linux-mm@kvack.org
cc: linux-block@vger.kernel.org
cc: linux-fsdevel@vger.kernel.org
Link: https://lore.kernel.org/r/20230522135018.2742245-29-dhowells@redhat.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2023-05-24 08:42:17 -06:00
Yangtao Li
f768dc3cf7 udf: use wrapper i_blocksize() in udf_discard_prealloc()
Convert to use i_blocksize() for readability.

Signed-off-by: Yangtao Li <frank.li@vivo.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Message-Id: <20230310030821.66090-2-frank.li@vivo.com>
2023-03-13 11:16:16 +01:00
Matthew Wilcox (Oracle)
96acbef66b udf: Use folios in udf_adinicb_writepage()
Make udf_adinicb_writepage() fully converted to using the passed folio
instead of converting it to the page.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Jan Kara <jack@suse.cz>
2023-03-08 18:55:25 +01:00
Jan Kara
63bceed808 udf: Warn if block mapping is done for in-ICB files
Now that address space operations are merge dfor in-ICB and normal
files, it is more likely some code mistakenly tries to map blocks for
in-ICB files. WARN and return error instead of silently returning
garbage.

Signed-off-by: Jan Kara <jack@suse.cz>
2023-03-06 16:38:25 +01:00
Jan Kara
cecb1f0654 udf: Fix reading of in-ICB files
After merging address space operations of normal and in-ICB files,
readahead could get called for in-ICB files which resulted in
udf_get_block() being called for these files. udf_get_block() is not
prepared to be called for in-ICB files and ends up returning garbage
results as it interprets file data as extent list. Fix the problem by
skipping readahead for in-ICB files.

Fixes: 37a8a39f7a ("udf: Switch to single address_space_operations")
Signed-off-by: Jan Kara <jack@suse.cz>
2023-03-06 16:38:25 +01:00
Jan Kara
49854d3ccc udf: Fix lost writes in udf_adinicb_writepage()
The patch converting udf_adinicb_writepage() to avoid manually kmapping
the page used memcpy_to_page() however that copies in the wrong
direction (effectively overwriting file data with the old contents).
What we should be using is memcpy_from_page() to copy data from the page
into the inode and then mark inode dirty to store the data.

Fixes: 5cfc45321a ("udf: Convert udf_adinicb_writepage() to memcpy_to_page()")
Signed-off-by: Jan Kara <jack@suse.cz>
2023-03-06 16:38:25 +01:00
Linus Torvalds
3822a7c409 - Daniel Verkamp has contributed a memfd series ("mm/memfd: add
F_SEAL_EXEC") which permits the setting of the memfd execute bit at
   memfd creation time, with the option of sealing the state of the X bit.
 
 - Peter Xu adds a patch series ("mm/hugetlb: Make huge_pte_offset()
   thread-safe for pmd unshare") which addresses a rare race condition
   related to PMD unsharing.
 
 - Several folioification patch serieses from Matthew Wilcox, Vishal
   Moola, Sidhartha Kumar and Lorenzo Stoakes
 
 - Johannes Weiner has a series ("mm: push down lock_page_memcg()") which
   does perform some memcg maintenance and cleanup work.
 
 - SeongJae Park has added DAMOS filtering to DAMON, with the series
   "mm/damon/core: implement damos filter".  These filters provide users
   with finer-grained control over DAMOS's actions.  SeongJae has also done
   some DAMON cleanup work.
 
 - Kairui Song adds a series ("Clean up and fixes for swap").
 
 - Vernon Yang contributed the series "Clean up and refinement for maple
   tree".
 
 - Yu Zhao has contributed the "mm: multi-gen LRU: memcg LRU" series.  It
   adds to MGLRU an LRU of memcgs, to improve the scalability of global
   reclaim.
 
 - David Hildenbrand has added some userfaultfd cleanup work in the
   series "mm: uffd-wp + change_protection() cleanups".
 
 - Christoph Hellwig has removed the generic_writepages() library
   function in the series "remove generic_writepages".
 
 - Baolin Wang has performed some maintenance on the compaction code in
   his series "Some small improvements for compaction".
 
 - Sidhartha Kumar is doing some maintenance work on struct page in his
   series "Get rid of tail page fields".
 
 - David Hildenbrand contributed some cleanup, bugfixing and
   generalization of pte management and of pte debugging in his series "mm:
   support __HAVE_ARCH_PTE_SWP_EXCLUSIVE on all architectures with swap
   PTEs".
 
 - Mel Gorman and Neil Brown have removed the __GFP_ATOMIC allocation
   flag in the series "Discard __GFP_ATOMIC".
 
 - Sergey Senozhatsky has improved zsmalloc's memory utilization with his
   series "zsmalloc: make zspage chain size configurable".
 
 - Joey Gouly has added prctl() support for prohibiting the creation of
   writeable+executable mappings.  The previous BPF-based approach had
   shortcomings.  See "mm: In-kernel support for memory-deny-write-execute
   (MDWE)".
 
 - Waiman Long did some kmemleak cleanup and bugfixing in the series
   "mm/kmemleak: Simplify kmemleak_cond_resched() & fix UAF".
 
 - T.J.  Alumbaugh has contributed some MGLRU cleanup work in his series
   "mm: multi-gen LRU: improve".
 
 - Jiaqi Yan has provided some enhancements to our memory error
   statistics reporting, mainly by presenting the statistics on a per-node
   basis.  See the series "Introduce per NUMA node memory error
   statistics".
 
 - Mel Gorman has a second and hopefully final shot at fixing a CPU-hog
   regression in compaction via his series "Fix excessive CPU usage during
   compaction".
 
 - Christoph Hellwig does some vmalloc maintenance work in the series
   "cleanup vfree and vunmap".
 
 - Christoph Hellwig has removed block_device_operations.rw_page() in ths
   series "remove ->rw_page".
 
 - We get some maple_tree improvements and cleanups in Liam Howlett's
   series "VMA tree type safety and remove __vma_adjust()".
 
 - Suren Baghdasaryan has done some work on the maintainability of our
   vm_flags handling in the series "introduce vm_flags modifier functions".
 
 - Some pagemap cleanup and generalization work in Mike Rapoport's series
   "mm, arch: add generic implementation of pfn_valid() for FLATMEM" and
   "fixups for generic implementation of pfn_valid()"
 
 - Baoquan He has done some work to make /proc/vmallocinfo and
   /proc/kcore better represent the real state of things in his series
   "mm/vmalloc.c: allow vread() to read out vm_map_ram areas".
 
 - Jason Gunthorpe rationalized the GUP system's interface to the rest of
   the kernel in the series "Simplify the external interface for GUP".
 
 - SeongJae Park wishes to migrate people from DAMON's debugfs interface
   over to its sysfs interface.  To support this, we'll temporarily be
   printing warnings when people use the debugfs interface.  See the series
   "mm/damon: deprecate DAMON debugfs interface".
 
 - Andrey Konovalov provided the accurately named "lib/stackdepot: fixes
   and clean-ups" series.
 
 - Huang Ying has provided a dramatic reduction in migration's TLB flush
   IPI rates with the series "migrate_pages(): batch TLB flushing".
 
 - Arnd Bergmann has some objtool fixups in "objtool warning fixes".
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Merge tag 'mm-stable-2023-02-20-13-37' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Pull MM updates from Andrew Morton:

 - Daniel Verkamp has contributed a memfd series ("mm/memfd: add
   F_SEAL_EXEC") which permits the setting of the memfd execute bit at
   memfd creation time, with the option of sealing the state of the X
   bit.

 - Peter Xu adds a patch series ("mm/hugetlb: Make huge_pte_offset()
   thread-safe for pmd unshare") which addresses a rare race condition
   related to PMD unsharing.

 - Several folioification patch serieses from Matthew Wilcox, Vishal
   Moola, Sidhartha Kumar and Lorenzo Stoakes

 - Johannes Weiner has a series ("mm: push down lock_page_memcg()")
   which does perform some memcg maintenance and cleanup work.

 - SeongJae Park has added DAMOS filtering to DAMON, with the series
   "mm/damon/core: implement damos filter".

   These filters provide users with finer-grained control over DAMOS's
   actions. SeongJae has also done some DAMON cleanup work.

 - Kairui Song adds a series ("Clean up and fixes for swap").

 - Vernon Yang contributed the series "Clean up and refinement for maple
   tree".

 - Yu Zhao has contributed the "mm: multi-gen LRU: memcg LRU" series. It
   adds to MGLRU an LRU of memcgs, to improve the scalability of global
   reclaim.

 - David Hildenbrand has added some userfaultfd cleanup work in the
   series "mm: uffd-wp + change_protection() cleanups".

 - Christoph Hellwig has removed the generic_writepages() library
   function in the series "remove generic_writepages".

 - Baolin Wang has performed some maintenance on the compaction code in
   his series "Some small improvements for compaction".

 - Sidhartha Kumar is doing some maintenance work on struct page in his
   series "Get rid of tail page fields".

 - David Hildenbrand contributed some cleanup, bugfixing and
   generalization of pte management and of pte debugging in his series
   "mm: support __HAVE_ARCH_PTE_SWP_EXCLUSIVE on all architectures with
   swap PTEs".

 - Mel Gorman and Neil Brown have removed the __GFP_ATOMIC allocation
   flag in the series "Discard __GFP_ATOMIC".

 - Sergey Senozhatsky has improved zsmalloc's memory utilization with
   his series "zsmalloc: make zspage chain size configurable".

 - Joey Gouly has added prctl() support for prohibiting the creation of
   writeable+executable mappings.

   The previous BPF-based approach had shortcomings. See "mm: In-kernel
   support for memory-deny-write-execute (MDWE)".

 - Waiman Long did some kmemleak cleanup and bugfixing in the series
   "mm/kmemleak: Simplify kmemleak_cond_resched() & fix UAF".

 - T.J. Alumbaugh has contributed some MGLRU cleanup work in his series
   "mm: multi-gen LRU: improve".

 - Jiaqi Yan has provided some enhancements to our memory error
   statistics reporting, mainly by presenting the statistics on a
   per-node basis. See the series "Introduce per NUMA node memory error
   statistics".

 - Mel Gorman has a second and hopefully final shot at fixing a CPU-hog
   regression in compaction via his series "Fix excessive CPU usage
   during compaction".

 - Christoph Hellwig does some vmalloc maintenance work in the series
   "cleanup vfree and vunmap".

 - Christoph Hellwig has removed block_device_operations.rw_page() in
   ths series "remove ->rw_page".

 - We get some maple_tree improvements and cleanups in Liam Howlett's
   series "VMA tree type safety and remove __vma_adjust()".

 - Suren Baghdasaryan has done some work on the maintainability of our
   vm_flags handling in the series "introduce vm_flags modifier
   functions".

 - Some pagemap cleanup and generalization work in Mike Rapoport's
   series "mm, arch: add generic implementation of pfn_valid() for
   FLATMEM" and "fixups for generic implementation of pfn_valid()"

 - Baoquan He has done some work to make /proc/vmallocinfo and
   /proc/kcore better represent the real state of things in his series
   "mm/vmalloc.c: allow vread() to read out vm_map_ram areas".

 - Jason Gunthorpe rationalized the GUP system's interface to the rest
   of the kernel in the series "Simplify the external interface for
   GUP".

 - SeongJae Park wishes to migrate people from DAMON's debugfs interface
   over to its sysfs interface. To support this, we'll temporarily be
   printing warnings when people use the debugfs interface. See the
   series "mm/damon: deprecate DAMON debugfs interface".

 - Andrey Konovalov provided the accurately named "lib/stackdepot: fixes
   and clean-ups" series.

 - Huang Ying has provided a dramatic reduction in migration's TLB flush
   IPI rates with the series "migrate_pages(): batch TLB flushing".

 - Arnd Bergmann has some objtool fixups in "objtool warning fixes".

* tag 'mm-stable-2023-02-20-13-37' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (505 commits)
  include/linux/migrate.h: remove unneeded externs
  mm/memory_hotplug: cleanup return value handing in do_migrate_range()
  mm/uffd: fix comment in handling pte markers
  mm: change to return bool for isolate_movable_page()
  mm: hugetlb: change to return bool for isolate_hugetlb()
  mm: change to return bool for isolate_lru_page()
  mm: change to return bool for folio_isolate_lru()
  objtool: add UACCESS exceptions for __tsan_volatile_read/write
  kmsan: disable ftrace in kmsan core code
  kasan: mark addr_has_metadata __always_inline
  mm: memcontrol: rename memcg_kmem_enabled()
  sh: initialize max_mapnr
  m68k/nommu: add missing definition of ARCH_PFN_OFFSET
  mm: percpu: fix incorrect size in pcpu_obj_full_size()
  maple_tree: reduce stack usage with gcc-9 and earlier
  mm: page_alloc: call panic() when memoryless node allocation fails
  mm: multi-gen LRU: avoid futile retries
  migrate_pages: move THP/hugetlb migration support check to simplify code
  migrate_pages: batch flushing TLB
  migrate_pages: share more code between _unmap and _move
  ...
2023-02-23 17:09:35 -08:00
Linus Torvalds
553637f73c for-6.3/dio-2023-02-16
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Merge tag 'for-6.3/dio-2023-02-16' of git://git.kernel.dk/linux

Pull legacy dio update from Jens Axboe:
 "We only have a few file systems that use the old dio code, make them
  select it rather than build it unconditionally"

* tag 'for-6.3/dio-2023-02-16' of git://git.kernel.dk/linux:
  fs: build the legacy direct I/O code conditionally
  fs: move sb_init_dio_done_wq out of direct-io.c
2023-02-20 14:10:36 -08:00
Linus Torvalds
274978f173 \n
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Merge tag 'fixes_for_v6.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs

Pull UDF and ext2 fixes from Jan Kara:

 - Rewrite of udf directory iteration code to address multiple syzbot
   reports

 - Fixes to udf extent handling and block mapping code to address
   several syzbot reports and filesystem corruption issues uncovered by
   fsx & fsstress

 - Convert udf to kmap_local()

 - Add sanity checks when loading udf bitmaps

 - Drop old VARCONV support which I've never seen used and which was
   broken for quite some years without anybody noticing

 - Finish conversion of ext2 to kmap_local()

 - One fix to mpage_writepages() on which other udf fixes depend

* tag 'fixes_for_v6.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs: (78 commits)
  udf: Avoid directory type conversion failure due to ENOMEM
  udf: Use unsigned variables for size calculations
  udf: remove reporting loc in debug output
  udf: Check consistency of Space Bitmap Descriptor
  udf: Fix file counting in LVID
  udf: Limit file size to 4TB
  udf: Don't return bh from udf_expand_dir_adinicb()
  udf: Convert udf_expand_file_adinicb() to avoid kmap_atomic()
  udf: Convert udf_adinicb_writepage() to memcpy_to_page()
  udf: Switch udf_adinicb_readpage() to kmap_local_page()
  udf: Move udf_adinicb_readpage() to inode.c
  udf: Mark aops implementation static
  udf: Switch to single address_space_operations
  udf: Add handling of in-ICB files to udf_bmap()
  udf: Convert all file types to use udf_write_end()
  udf: Convert in-ICB files to use udf_write_begin()
  udf: Convert in-ICB files to use udf_direct_IO()
  udf: Convert in-ICB files to use udf_writepages()
  udf: Unify .read_folio for normal and in-ICB files
  udf: Fix off-by-one error when discarding preallocation
  ...
2023-02-20 12:44:08 -08:00
Linus Torvalds
05e6295f7b fs.idmapped.v6.3
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Merge tag 'fs.idmapped.v6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/idmapping

Pull vfs idmapping updates from Christian Brauner:

 - Last cycle we introduced the dedicated struct mnt_idmap type for
   mount idmapping and the required infrastucture in 256c8aed2b ("fs:
   introduce dedicated idmap type for mounts"). As promised in last
   cycle's pull request message this converts everything to rely on
   struct mnt_idmap.

   Currently we still pass around the plain namespace that was attached
   to a mount. This is in general pretty convenient but it makes it easy
   to conflate namespaces that are relevant on the filesystem with
   namespaces that are relevant on the mount level. Especially for
   non-vfs developers without detailed knowledge in this area this was a
   potential source for bugs.

   This finishes the conversion. Instead of passing the plain namespace
   around this updates all places that currently take a pointer to a
   mnt_userns with a pointer to struct mnt_idmap.

   Now that the conversion is done all helpers down to the really
   low-level helpers only accept a struct mnt_idmap argument instead of
   two namespace arguments.

   Conflating mount and other idmappings will now cause the compiler to
   complain loudly thus eliminating the possibility of any bugs. This
   makes it impossible for filesystem developers to mix up mount and
   filesystem idmappings as they are two distinct types and require
   distinct helpers that cannot be used interchangeably.

   Everything associated with struct mnt_idmap is moved into a single
   separate file. With that change no code can poke around in struct
   mnt_idmap. It can only be interacted with through dedicated helpers.
   That means all filesystems are and all of the vfs is completely
   oblivious to the actual implementation of idmappings.

   We are now also able to extend struct mnt_idmap as we see fit. For
   example, we can decouple it completely from namespaces for users that
   don't require or don't want to use them at all. We can also extend
   the concept of idmappings so we can cover filesystem specific
   requirements.

   In combination with the vfs{g,u}id_t work we finished in v6.2 this
   makes this feature substantially more robust and thus difficult to
   implement wrong by a given filesystem and also protects the vfs.

 - Enable idmapped mounts for tmpfs and fulfill a longstanding request.

   A long-standing request from users had been to make it possible to
   create idmapped mounts for tmpfs. For example, to share the host's
   tmpfs mount between multiple sandboxes. This is a prerequisite for
   some advanced Kubernetes cases. Systemd also has a range of use-cases
   to increase service isolation. And there are more users of this.

   However, with all of the other work going on this was way down on the
   priority list but luckily someone other than ourselves picked this
   up.

   As usual the patch is tiny as all the infrastructure work had been
   done multiple kernel releases ago. In addition to all the tests that
   we already have I requested that Rodrigo add a dedicated tmpfs
   testsuite for idmapped mounts to xfstests. It is to be included into
   xfstests during the v6.3 development cycle. This should add a slew of
   additional tests.

* tag 'fs.idmapped.v6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/idmapping: (26 commits)
  shmem: support idmapped mounts for tmpfs
  fs: move mnt_idmap
  fs: port vfs{g,u}id helpers to mnt_idmap
  fs: port fs{g,u}id helpers to mnt_idmap
  fs: port i_{g,u}id_into_vfs{g,u}id() to mnt_idmap
  fs: port i_{g,u}id_{needs_}update() to mnt_idmap
  quota: port to mnt_idmap
  fs: port privilege checking helpers to mnt_idmap
  fs: port inode_owner_or_capable() to mnt_idmap
  fs: port inode_init_owner() to mnt_idmap
  fs: port acl to mnt_idmap
  fs: port xattr to mnt_idmap
  fs: port ->permission() to pass mnt_idmap
  fs: port ->fileattr_set() to pass mnt_idmap
  fs: port ->set_acl() to pass mnt_idmap
  fs: port ->get_acl() to pass mnt_idmap
  fs: port ->tmpfile() to pass mnt_idmap
  fs: port ->rename() to pass mnt_idmap
  fs: port ->mknod() to pass mnt_idmap
  fs: port ->mkdir() to pass mnt_idmap
  ...
2023-02-20 11:53:11 -08:00
Jan Kara
df97f64dfa udf: Avoid directory type conversion failure due to ENOMEM
When converting directory from in-ICB to normal format, the last
iteration through the directory fixing up directory enteries can fail
due to ENOMEM. We do not expect this iteration to fail since the
directory is already verified to be correct and it is difficult to undo
the conversion at this point. So just use GFP_NOFAIL to make sure the
small allocation cannot fail.

Reported-by: syzbot+111eaa994ff74f8d440f@syzkaller.appspotmail.com
Fixes: 0aba4860b0 ("udf: Allocate name buffer in directory iterator on heap")
Signed-off-by: Jan Kara <jack@suse.cz>
2023-02-09 10:37:12 +01:00
Kees Cook
51e38c92be udf: Use unsigned variables for size calculations
To avoid confusing the compiler about possible negative sizes, switch
various size variables that can never be negative from int to u32. Seen
with GCC 13:

../fs/udf/directory.c: In function 'udf_copy_fi':
../include/linux/fortify-string.h:57:33: warning: '__builtin_memcpy' pointer overflow between offset 80 and size [-2147483648, -1] [-Warray-bounds=]
   57 | #define __underlying_memcpy     __builtin_memcpy
      |                                 ^
...
../fs/udf/directory.c:102:9: note: in expansion of macro 'memcpy'
  102 |         memcpy(&iter->fi, iter->bh[0]->b_data + off, len);
      |         ^~~~~~

Cc: Jan Kara <jack@suse.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Jan Kara <jack@suse.cz>
Message-Id: <20230204183427.never.856-kees@kernel.org>
2023-02-07 13:05:31 +01:00
Tom Rix
f8d0dd0bc3 udf: remove reporting loc in debug output
clang build fails with
fs/udf/partition.c:86:28: error: variable 'loc' is uninitialized when used here [-Werror,-Wuninitialized]
                          sb, block, partition, loc, index);
                                                ^~~

loc is now only known when bh is valid. So remove reporting loc in debug
output.

Fixes: 4215db46d5 ("udf: Use udf_bread() in udf_get_pblock_virt15()")
Reported-by: kernel test robot <lkp@intel.com>
Reported-by: "kernelci.org bot" <bot@kernelci.org>
Signed-off-by: Tom Rix <trix@redhat.com>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Jan Kara <jack@suse.cz>
2023-02-07 12:02:09 +01:00
Vladislav Efanov
1e0d4adf17 udf: Check consistency of Space Bitmap Descriptor
Bits, which are related to Bitmap Descriptor logical blocks,
are not reset when buffer headers are allocated for them. As the
result, these logical blocks can be treated as free and
be used for other blocks.This can cause usage of one buffer header
for several types of data. UDF issues WARNING in this situation:

WARNING: CPU: 0 PID: 2703 at fs/udf/inode.c:2014
  __udf_add_aext+0x685/0x7d0 fs/udf/inode.c:2014

RIP: 0010:__udf_add_aext+0x685/0x7d0 fs/udf/inode.c:2014
Call Trace:
 udf_setup_indirect_aext+0x573/0x880 fs/udf/inode.c:1980
 udf_add_aext+0x208/0x2e0 fs/udf/inode.c:2067
 udf_insert_aext fs/udf/inode.c:2233 [inline]
 udf_update_extents fs/udf/inode.c:1181 [inline]
 inode_getblk+0x1981/0x3b70 fs/udf/inode.c:885

Found by Linux Verification Center (linuxtesting.org) with syzkaller.

[JK: Somewhat cleaned up the boundary checks]

Fixes: 1da177e4c3 ("Linux-2.6.12-rc2")
Signed-off-by: Vladislav Efanov <VEfanov@ispras.ru>
Signed-off-by: Jan Kara <jack@suse.cz>
2023-02-07 11:49:43 +01:00
Christoph Hellwig
9636e650e1 fs: build the legacy direct I/O code conditionally
Add a new LEGACY_DIRECT_IO config symbol that is only selected by the
file systems that still use the legacy blockdev_direct_IO code, so that
kernels without support for those file systems don't need to build the
code.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Eric Biggers <ebiggers@google.com>
Link: https://lore.kernel.org/r/20230125065839.191256-3-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2023-01-26 10:30:56 -07:00
Jan Kara
085cf7b7e2 udf: Fix file counting in LVID
numFiles entry in LVID should actually contain number for non-dir file
entries, not the number of non-dir inodes. Move the counting from inode
allocation / deallocation into directory entry handling functions.

Signed-off-by: Jan Kara <jack@suse.cz>
2023-01-26 16:46:37 +01:00
Jan Kara
c2efd13a2e udf: Limit file size to 4TB
UDF disk format supports in principle file sizes up to 1<<64-1. However
the file space (including holes) is described by a linked list of
extents, each of which can have at most 1GB. Thus the creation and
handling of extents gets unusably slow beyond certain point. Limit the
file size to 4TB to avoid locking up the kernel too easily.

Signed-off-by: Jan Kara <jack@suse.cz>
2023-01-26 16:46:37 +01:00
Jan Kara
f386c802a6 udf: Don't return bh from udf_expand_dir_adinicb()
Nobody uses the bh returned from udf_expand_dir_adinicb(). Don't return
it.

Signed-off-by: Jan Kara <jack@suse.cz>
2023-01-26 16:46:37 +01:00
Jan Kara
1eeceaec79 udf: Convert udf_expand_file_adinicb() to avoid kmap_atomic()
Remove the last two remaining kmap_atomic() uses in UDF in
udf_expand_file_adinicb(). The first use can be actually conveniently
replaced with udf_adinicb_readpage(), the second with memcpy_to_page().

Signed-off-by: Jan Kara <jack@suse.cz>
2023-01-26 16:46:37 +01:00
Jan Kara
5cfc45321a udf: Convert udf_adinicb_writepage() to memcpy_to_page()
Instead of mapping the page manually with kmap() atomic, use helper
memcpy_to_page(). Also delete the pointless SetPageUptodate() call.

Signed-off-by: Jan Kara <jack@suse.cz>
2023-01-26 16:46:36 +01:00
Jan Kara
7b7f68655f udf: Switch udf_adinicb_readpage() to kmap_local_page()
Instead of using kmap_atomic() use kmap_local_page() in
udf_adinicb_readpage().

Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jan Kara <jack@suse.cz>
2023-01-26 16:46:36 +01:00
Jan Kara
174cb748d8 udf: Move udf_adinicb_readpage() to inode.c
udf_adinicb_readpage() is only called from aops functions, move it to
the same file as its callers and also drop the stale comment -
invalidate_lock is protecting us against races with truncate.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jan Kara <jack@suse.cz>
2023-01-26 16:46:36 +01:00
Jan Kara
759e4d74c0 udf: Mark aops implementation static
Mark functions implementing aops static since they are not needed
outside of inode.c anymore.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jan Kara <jack@suse.cz>
2023-01-26 16:46:36 +01:00
Jan Kara
37a8a39f7a udf: Switch to single address_space_operations
Now that udf_aops and udf_adiniicb_aops are functionally identical, just
drop udf_adiniicb_aops.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jan Kara <jack@suse.cz>
2023-01-26 16:46:36 +01:00
Jan Kara
907c6c2ffa udf: Add handling of in-ICB files to udf_bmap()
Add detection of in-ICB files to udf_bmap() and return error in that
case. This will allow us o use single address_space_operations in UDF.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jan Kara <jack@suse.cz>
2023-01-26 16:46:36 +01:00
Jan Kara
c694e40ba2 udf: Convert all file types to use udf_write_end()
Switching address_space_operations while a file is used is difficult to
do in a race-free way. To be able to use single address_space_operations
in UDF, create udf_write_end() function that is able to handle both
normal and in-ICB files.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jan Kara <jack@suse.cz>
2023-01-26 16:46:36 +01:00
Jan Kara
60b99a1b9f udf: Convert in-ICB files to use udf_write_begin()
Switching address_space_operations while a file is used is difficult to
do in a race-free way. To be able to use single address_space_operations
in UDF, make in-ICB files use udf_write_begin().

Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jan Kara <jack@suse.cz>
2023-01-26 16:46:35 +01:00
Jan Kara
d5abfb1b7b udf: Convert in-ICB files to use udf_direct_IO()
Switching address_space_operations while a file is used is difficult to
do in a race-free way. To be able to use single address_space_operations
in UDF, make in-ICB files use udf_direct_IO().

Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jan Kara <jack@suse.cz>
2023-01-26 16:46:35 +01:00
Jan Kara
79d3c6dbad udf: Convert in-ICB files to use udf_writepages()
Switching address_space_operations while a file is used is difficult to
do in a race-free way. To be able to use single address_space_operations
in UDF, make in-ICB files use udf_writepages().

Reported-by: syzbot+c27475eb921c46bbdc62@syzkaller.appspotmail.com
Reported-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jan Kara <jack@suse.cz>
2023-01-26 16:46:35 +01:00
Jan Kara
b7c31e6f14 udf: Unify .read_folio for normal and in-ICB files
Switching address_space_operations while a file is used is difficult to
do in a race-free way. To be able to use single address_space_operations
in UDF, make udf_read_folio() handle both normal and in-ICB files.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jan Kara <jack@suse.cz>
2023-01-26 16:46:35 +01:00
Jan Kara
f54aa97fb7 udf: Fix off-by-one error when discarding preallocation
The condition determining whether the preallocation can be used had
an off-by-one error so we didn't discard preallocation when new
allocation was just following it. This can then confuse code in
inode_getblk().

CC: stable@vger.kernel.org
Fixes: 16d0556568 ("udf: Discard preallocation before extending file with a hole")
Signed-off-by: Jan Kara <jack@suse.cz>
2023-01-26 16:46:35 +01:00
Jan Kara
36ec52ea03 udf: Fix file corruption when appending just after end of preallocated extent
When we append new block just after the end of preallocated extent, the
code in inode_getblk() wrongly determined we're going to use the
preallocated extent which resulted in adding block into a wrong logical
offset in the file. Sequence like this manifests it:

xfs_io -f -c "pwrite 0x2cacf 0xd122" -c "truncate 0x2dd6f" \
  -c "pwrite 0x27fd9 0x69a9" -c "pwrite 0x32981 0x7244" <file>

The code that determined the use of preallocated extent is actually
stale because udf_do_extend_file() does not create preallocation anymore
so after calling that function we are sure there's no usable
preallocation. Just remove the faulty condition.

CC: stable@vger.kernel.org
Fixes: 16d0556568 ("udf: Discard preallocation before extending file with a hole")
Signed-off-by: Jan Kara <jack@suse.cz>
2023-01-26 16:46:35 +01:00
Jan Kara
36580ed087 udf: Do not allocate blocks on page writeback
Now when we allocate blocks on write page fault there should be no block
allocation happening on page writeback. So just ignore the 'create' flag
passed to udf_get_block(). Note that we can spot dirty buffers without
underlying blocks allocated in writeback when we race with expanding
truncate. However in that case these buffers do not contain valid data
so we can safely ignore them and we would just create ourselves problem
when to trim the tail extent.

Signed-off-by: Jan Kara <jack@suse.cz>
2023-01-26 16:46:35 +01:00
Jan Kara
3c21204818 udf: Allocate blocks on write page fault
Currently if file with holes is mapped, udf allocates blocks for dirtied
pages during page writeback. This however creates problems when to
truncate final extent to proper size and currently we leave the last
extent untruncated which violates UDF standard. So allocate blocks on
write page fault instead. In that case the last extent gets truncated
the file is closed and everything is happy.

Signed-off-by: Jan Kara <jack@suse.cz>
2023-01-26 16:46:35 +01:00
Jan Kara
b9a861fd52 udf: Protect truncate and file type conversion with invalidate_lock
Protect truncate and file type conversion in udf_file_write_iter() with
invalidate lock. That will allow us to serialize these paths with page
faults so that the page fault can determine the file type in a racefree
way.

Signed-off-by: Jan Kara <jack@suse.cz>
2023-01-26 16:46:35 +01:00
Jan Kara
96eeaaaea5 udf: Simplify error handling in udf_file_write_iter()
When udf_expand_file_adinicb() fails, we can now use the standard exit
path instead of implementing our own.

Signed-off-by: Jan Kara <jack@suse.cz>
2023-01-26 16:46:34 +01:00
Jan Kara
2d532616c7 udf: Push i_data_sem locking into udf_extend_file()
Push i_data_sem locking into udf_extend_file(). It somewhat simplifies
the code around it.

Signed-off-by: Jan Kara <jack@suse.cz>
2023-01-26 16:46:34 +01:00
Jan Kara
6a3b37e0ea udf: Push i_data_sem locking into udf_expand_file_adinicb()
The checks we do in udf_setsize() and udf_file_write_iter() are safe to
do only with i_rwsem locked as it stabilizes both file type and file
size. Hence we don't need to lock i_data_sem before we enter
udf_expand_file_adinicb() which simplifies the locking somewhat.

Signed-off-by: Jan Kara <jack@suse.cz>
2023-01-26 16:46:34 +01:00
Jan Kara
f950fd0529 udf: Protect rename against modification of moved directory
When we are renaming a directory to a different directory, we need to
update '..' entry in the moved directory. However nothing prevents moved
directory from being modified and even converted from the in-ICB format
to the normal format which results in a crash. Fix the problem by
locking the moved directory.

Reported-by: syzbot+aebf90eea2671c43112a@syzkaller.appspotmail.com
Signed-off-by: Jan Kara <jack@suse.cz>
2023-01-26 16:46:34 +01:00
Jan Kara
32f123a3f3 udf: Fold udf_getblk() into udf_bread()
udf_getblk() has a single call site. Fold it there.

Signed-off-by: Jan Kara <jack@suse.cz>
2023-01-26 16:46:33 +01:00
Jan Kara
541e047b14 udf: Use udf_map_block() in udf_getblk()
Use the new function udf_map_block() in udf_getblk().

Signed-off-by: Jan Kara <jack@suse.cz>
2023-01-26 16:46:33 +01:00
Jan Kara
8094252178 udf: Add flag to disable block preallocation
In some cases we don't want to create block preallocation when
allocating blocks. Add a flag to udf_map_rq controlling the behavior.

Signed-off-by: Jan Kara <jack@suse.cz>
2023-01-26 16:46:33 +01:00
Jan Kara
b3c03fcef2 udf: Pass mapping request into inode_getblk()
Pass struct udf_map_rq into inode_getblk() instead of unfolding it and
the putting the results back.

Signed-off-by: Jan Kara <jack@suse.cz>
2023-01-26 16:46:33 +01:00
Jan Kara
364a6665d5 udf: Fold udf_block_map() into udf_map_block()
udf_block_map() has now only a single caller. Fold it there.

Signed-off-by: Jan Kara <jack@suse.cz>
2023-01-26 16:46:33 +01:00