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Merge tag 'vfs-6.12.folio' of gitolite.kernel.org:pub/scm/linux/kernel/git/vfs/vfs

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Pull vfs folio updates from Christian Brauner:
 "This contains work to port write_begin and write_end to rely on folios
  for various filesystems.

  This converts ocfs2, vboxfs, orangefs, jffs2, hostfs, fuse, f2fs,
  ecryptfs, ntfs3, nilfs2, reiserfs, minixfs, qnx6, sysv, ufs, and
  squashfs.

  After this series lands a bunch of the filesystems in this list do not
  mention struct page anymore"

* tag 'vfs-6.12.folio' of gitolite.kernel.org:pub/scm/linux/kernel/git/vfs/vfs: (61 commits)
  Squashfs: Ensure all readahead pages have been used
  Squashfs: Rewrite and update squashfs_readahead_fragment() to not use page->index
  Squashfs: Update squashfs_readpage_block() to not use page->index
  Squashfs: Update squashfs_readahead() to not use page->index
  Squashfs: Update page_actor to not use page->index
  jffs2: Use a folio in jffs2_garbage_collect_dnode()
  jffs2: Convert jffs2_do_readpage_nolock to take a folio
  buffer: Convert __block_write_begin() to take a folio
  ocfs2: Convert ocfs2_write_zero_page to use a folio
  fs: Convert aops->write_begin to take a folio
  fs: Convert aops->write_end to take a folio
  vboxsf: Use a folio in vboxsf_write_end()
  orangefs: Convert orangefs_write_begin() to use a folio
  orangefs: Convert orangefs_write_end() to use a folio
  jffs2: Convert jffs2_write_begin() to use a folio
  jffs2: Convert jffs2_write_end() to use a folio
  hostfs: Convert hostfs_write_end() to use a folio
  fuse: Convert fuse_write_begin() to use a folio
  fuse: Convert fuse_write_end() to use a folio
  f2fs: Convert f2fs_write_begin() to use a folio
  ...
This commit is contained in:
Linus Torvalds
2024-09-16 08:54:30 +02:00
parent 8f72c31f45 84e0e03b30
commit 2775df6e5e
83 changed files with 994 additions and 1064 deletions
Download Patch File Download Diff File Expand all files Collapse all files
Documentation/filesystems/locking.rst
+3 -3
View File
@@ -251,10 +251,10 @@ prototypes::
void (*readahead)(struct readahead_control *);
int (*write_begin)(struct file *, struct address_space *mapping,
loff_t pos, unsigned len,
struct page **pagep, void **fsdata);
struct folio **foliop, void **fsdata);
int (*write_end)(struct file *, struct address_space *mapping,
loff_t pos, unsigned len, unsigned copied,
struct page *page, void *fsdata);
struct folio *folio, void *fsdata);
sector_t (*bmap)(struct address_space *, sector_t);
void (*invalidate_folio) (struct folio *, size_t start, size_t len);
bool (*release_folio)(struct folio *, gfp_t);
@@ -280,7 +280,7 @@ read_folio: yes, unlocks shared
writepages:
dirty_folio: maybe
readahead: yes, unlocks shared
write_begin: locks the page exclusive
write_begin: locks the folio exclusive
write_end: yes, unlocks exclusive
bmap:
invalidate_folio: yes exclusive
Documentation/filesystems/vfs.rst
+6 -6
View File
@@ -810,7 +810,7 @@ cache in your filesystem. The following members are defined:
struct page **pagep, void **fsdata);
int (*write_end)(struct file *, struct address_space *mapping,
loff_t pos, unsigned len, unsigned copied,
struct page *page, void *fsdata);
struct folio *folio, void *fsdata);
sector_t (*bmap)(struct address_space *, sector_t);
void (*invalidate_folio) (struct folio *, size_t start, size_t len);
bool (*release_folio)(struct folio *, gfp_t);
@@ -926,12 +926,12 @@ cache in your filesystem. The following members are defined:
(if they haven't been read already) so that the updated blocks
can be written out properly.
The filesystem must return the locked pagecache page for the
specified offset, in ``*pagep``, for the caller to write into.
The filesystem must return the locked pagecache folio for the
specified offset, in ``*foliop``, for the caller to write into.
It must be able to cope with short writes (where the length
passed to write_begin is greater than the number of bytes copied
into the page).
into the folio).
A void * may be returned in fsdata, which then gets passed into
write_end.
@@ -944,8 +944,8 @@ cache in your filesystem. The following members are defined:
called. len is the original len passed to write_begin, and
copied is the amount that was able to be copied.
The filesystem must take care of unlocking the page and
releasing it refcount, and updating i_size.
The filesystem must take care of unlocking the folio,
decrementing its refcount, and updating i_size.
Returns < 0 on failure, otherwise the number of bytes (<=
'copied') that were able to be copied into pagecache.