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

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()
  ...

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>

This reverts commit f950fd0529130a617b3da526da9fb6a896ce87c2. 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>

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>

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>

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>

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>

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>

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>