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

Now that LIBCRC32C does nothing besides select CRC32, make every option
that selects LIBCRC32C instead select CRC32 directly.  Then remove
LIBCRC32C.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: "Martin K. Petersen" <martin.petersen@oracle.com>
Acked-by: Ard Biesheuvel <ardb@kernel.org>
Link: https://lore.kernel.org/r/20250401221600.24878-8-ebiggers@kernel.org
Signed-off-by: Eric Biggers <ebiggers@google.com>

In ceph, in fill_fscrypt_truncate(), the end flush position is calculated
by:

                loff_t lend = orig_pos + CEPH_FSCRYPT_BLOCK_SHIFT - 1;

but that's using the block shift not the block size.

Fix this to use the block size instead.

Fixes: 5c64737d2536 ("ceph: add truncate size handling support for fscrypt")
Signed-off-by: David Howells <dhowells@redhat.com>
Reviewed-by: Viacheslav Dubeyko <Slava.Dubeyko@ibm.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>

Pull vfs ceph updates from Christian Brauner:
 "This contains the work to remove access to page->index from ceph
  and fixes the test failure observed for ceph with generic/421 by
  refactoring ceph_writepages_start()"

* tag 'vfs-6.15-rc1.ceph' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs:
  fscrypt: Change fscrypt_encrypt_pagecache_blocks() to take a folio
  ceph: Fix error handling in fill_readdir_cache()
  fs: Remove page_mkwrite_check_truncate()
  ceph: Pass a folio to ceph_allocate_page_array()
  ceph: Convert ceph_move_dirty_page_in_page_array() to move_dirty_folio_in_page_array()
  ceph: Remove uses of page from ceph_process_folio_batch()
  ceph: Convert ceph_check_page_before_write() to use a folio
  ceph: Convert writepage_nounlock() to write_folio_nounlock()
  ceph: Convert ceph_readdir_cache_control to store a folio
  ceph: Convert ceph_find_incompatible() to take a folio
  ceph: Use a folio in ceph_page_mkwrite()
  ceph: Remove ceph_writepage()
  ceph: fix generic/421 test failure
  ceph: introduce ceph_submit_write() method
  ceph: introduce ceph_process_folio_batch() method
  ceph: extend ceph_writeback_ctl for ceph_writepages_start() refactoring

ext4 and ceph already have a folio to pass; f2fs needs to be properly
converted but this will do for now.  This removes a reference
to page->index and page->mapping as well as removing a call to
compound_head().

Signed-off-by: "Matthew Wilcox (Oracle)" <willy@infradead.org>
Link: https://lore.kernel.org/r/20250304170224.523141-1-willy@infradead.org
Acked-by: Eric Biggers <ebiggers@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>

__filemap_get_folio() returns an ERR_PTR, not NULL.  There are extensive
assumptions that ctl->folio is NULL, not an error pointer, so it seems
better to fix this one place rather than change all the places which
check ctl->folio.

Fixes: baff9740bc8f ("ceph: Convert ceph_readdir_cache_control to store a folio")
Reported-by: Dan Carpenter <dan.carpenter@linaro.org>
Signed-off-by: "Matthew Wilcox (Oracle)" <willy@infradead.org>
Link: https://lore.kernel.org/r/20250304154818.250757-1-willy@infradead.org
Cc: Viacheslav Dubeyko <Slava.Dubeyko@ibm.com>
Signed-off-by: Christian Brauner <brauner@kernel.org>

Remove two accesses to page->index.

Signed-off-by: "Matthew Wilcox (Oracle)" <willy@infradead.org>
Link: https://lore.kernel.org/r/20250217185119.430193-10-willy@infradead.org
Tested-by: Viacheslav Dubeyko <Slava.Dubeyko@ibm.com>
Signed-off-by: Christian Brauner <brauner@kernel.org>

Shorten the name of this internal function by dropping the 'ceph_'
prefix and pass in a folio instead of a page.

Signed-off-by: "Matthew Wilcox (Oracle)" <willy@infradead.org>
Link: https://lore.kernel.org/r/20250217185119.430193-9-willy@infradead.org
Tested-by: Viacheslav Dubeyko <Slava.Dubeyko@ibm.com>
Signed-off-by: Christian Brauner <brauner@kernel.org>

Remove uses of page->index and deprecated page APIs.  Saves a lot of
hidden calls to compound_head().

Also convert is_page_index_contiguous() to is_folio_index_contiguous()
and make its arguments const.

Signed-off-by: "Matthew Wilcox (Oracle)" <willy@infradead.org>
Link: https://lore.kernel.org/r/20250217185119.430193-8-willy@infradead.org
Tested-by: Viacheslav Dubeyko <Slava.Dubeyko@ibm.com>
Signed-off-by: Christian Brauner <brauner@kernel.org>

Remove the conversion back to a struct page and just use the folio
passed in.

Signed-off-by: "Matthew Wilcox (Oracle)" <willy@infradead.org>
Link: https://lore.kernel.org/r/20250217185119.430193-7-willy@infradead.org
Tested-by: Viacheslav Dubeyko <Slava.Dubeyko@ibm.com>
Signed-off-by: Christian Brauner <brauner@kernel.org>