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

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
  ...

1 files changed, 42 insertions, 46 deletions

diff --git a/fs/jffs2/file.c b/fs/jffs2/file.c
index e12cb145147e..13c18ccc13b0 100644
--- a/fs/jffs2/file.c
+++ b/fs/jffs2/file.c
@@ -23,10 +23,10 @@
 
 static int jffs2_write_end(struct file *filp, struct address_space *mapping,
 			loff_t pos, unsigned len, unsigned copied,
-			struct page *pg, void *fsdata);
+			struct folio *folio, void *fsdata);
 static int jffs2_write_begin(struct file *filp, struct address_space *mapping,
 			loff_t pos, unsigned len,
-			struct page **pagep, void **fsdata);
+			struct folio **foliop, void **fsdata);
 static int jffs2_read_folio(struct file *filp, struct folio *folio);
 
 int jffs2_fsync(struct file *filp, loff_t start, loff_t end, int datasync)
@@ -77,29 +77,27 @@ const struct address_space_operations jffs2_file_address_operations =
 	.write_end =	jffs2_write_end,
 };
 
-static int jffs2_do_readpage_nolock (struct inode *inode, struct page *pg)
+static int jffs2_do_readpage_nolock(struct inode *inode, struct folio *folio)
 {
 	struct jffs2_inode_info *f = JFFS2_INODE_INFO(inode);
 	struct jffs2_sb_info *c = JFFS2_SB_INFO(inode->i_sb);
-	unsigned char *pg_buf;
+	unsigned char *kaddr;
 	int ret;
 
 	jffs2_dbg(2, "%s(): ino #%lu, page at offset 0x%lx\n",
-		  __func__, inode->i_ino, pg->index << PAGE_SHIFT);
+		  __func__, inode->i_ino, folio->index << PAGE_SHIFT);
 
-	BUG_ON(!PageLocked(pg));
+	BUG_ON(!folio_test_locked(folio));
 
-	pg_buf = kmap(pg);
-	/* FIXME: Can kmap fail? */
-
-	ret = jffs2_read_inode_range(c, f, pg_buf, pg->index << PAGE_SHIFT,
+	kaddr = kmap_local_folio(folio, 0);
+	ret = jffs2_read_inode_range(c, f, kaddr, folio->index << PAGE_SHIFT,
 				     PAGE_SIZE);
+	kunmap_local(kaddr);
 
 	if (!ret)
-		SetPageUptodate(pg);
+		folio_mark_uptodate(folio);
 
-	flush_dcache_page(pg);
-	kunmap(pg);
+	flush_dcache_folio(folio);
 
 	jffs2_dbg(2, "readpage finished\n");
 	return ret;
@@ -107,7 +105,7 @@ static int jffs2_do_readpage_nolock (struct inode *inode, struct page *pg)
 
 int __jffs2_read_folio(struct file *file, struct folio *folio)
 {
-	int ret = jffs2_do_readpage_nolock(folio->mapping->host, &folio->page);
+	int ret = jffs2_do_readpage_nolock(folio->mapping->host, folio);
 	folio_unlock(folio);
 	return ret;
 }
@@ -125,9 +123,9 @@ static int jffs2_read_folio(struct file *file, struct folio *folio)
 
 static int jffs2_write_begin(struct file *filp, struct address_space *mapping,
 			loff_t pos, unsigned len,
-			struct page **pagep, void **fsdata)
+			struct folio **foliop, void **fsdata)
 {
-	struct page *pg;
+	struct folio *folio;
 	struct inode *inode = mapping->host;
 	struct jffs2_inode_info *f = JFFS2_INODE_INFO(inode);
 	struct jffs2_sb_info *c = JFFS2_SB_INFO(inode->i_sb);
@@ -206,29 +204,30 @@ static int jffs2_write_begin(struct file *filp, struct address_space *mapping,
 	 * page in read_cache_page(), which causes a deadlock.
 	 */
 	mutex_lock(&c->alloc_sem);
-	pg = grab_cache_page_write_begin(mapping, index);
-	if (!pg) {
-		ret = -ENOMEM;
+	folio = __filemap_get_folio(mapping, index, FGP_WRITEBEGIN,
+			mapping_gfp_mask(mapping));
+	if (IS_ERR(folio)) {
+		ret = PTR_ERR(folio);
 		goto release_sem;
 	}
-	*pagep = pg;
+	*foliop = folio;
 
 	/*
-	 * Read in the page if it wasn't already present. Cannot optimize away
-	 * the whole page write case until jffs2_write_end can handle the
+	 * Read in the folio if it wasn't already present. Cannot optimize away
+	 * the whole folio write case until jffs2_write_end can handle the
 	 * case of a short-copy.
 	 */
-	if (!PageUptodate(pg)) {
+	if (!folio_test_uptodate(folio)) {
 		mutex_lock(&f->sem);
-		ret = jffs2_do_readpage_nolock(inode, pg);
+		ret = jffs2_do_readpage_nolock(inode, folio);
 		mutex_unlock(&f->sem);
 		if (ret) {
-			unlock_page(pg);
-			put_page(pg);
+			folio_unlock(folio);
+			folio_put(folio);
 			goto release_sem;
 		}
 	}
-	jffs2_dbg(1, "end write_begin(). pg->flags %lx\n", pg->flags);
+	jffs2_dbg(1, "end write_begin(). folio->flags %lx\n", folio->flags);
 
 release_sem:
 	mutex_unlock(&c->alloc_sem);
@@ -238,7 +237,7 @@ out_err:
 
 static int jffs2_write_end(struct file *filp, struct address_space *mapping,
 			loff_t pos, unsigned len, unsigned copied,
-			struct page *pg, void *fsdata)
+			struct folio *folio, void *fsdata)
 {
 	/* Actually commit the write from the page cache page we're looking at.
 	 * For now, we write the full page out each time. It sucks, but it's simple
@@ -252,16 +251,17 @@ static int jffs2_write_end(struct file *filp, struct address_space *mapping,
 	unsigned aligned_start = start & ~3;
 	int ret = 0;
 	uint32_t writtenlen = 0;
+	void *buf;
 
-	jffs2_dbg(1, "%s(): ino #%lu, page at 0x%lx, range %d-%d, flags %lx\n",
-		  __func__, inode->i_ino, pg->index << PAGE_SHIFT,
-		  start, end, pg->flags);
+	jffs2_dbg(1, "%s(): ino #%lu, page at 0x%llx, range %d-%d, flags %lx\n",
+		  __func__, inode->i_ino, folio_pos(folio),
+		  start, end, folio->flags);
 
 	/* We need to avoid deadlock with page_cache_read() in
-	   jffs2_garbage_collect_pass(). So the page must be
+	   jffs2_garbage_collect_pass(). So the folio must be
 	   up to date to prevent page_cache_read() from trying
 	   to re-lock it. */
-	BUG_ON(!PageUptodate(pg));
+	BUG_ON(!folio_test_uptodate(folio));
 
 	if (end == PAGE_SIZE) {
 		/* When writing out the end of a page, write out the
@@ -276,8 +276,8 @@ static int jffs2_write_end(struct file *filp, struct address_space *mapping,
 	if (!ri) {
 		jffs2_dbg(1, "%s(): Allocation of raw inode failed\n",
 			  __func__);
-		unlock_page(pg);
-		put_page(pg);
+		folio_unlock(folio);
+		folio_put(folio);
 		return -ENOMEM;
 	}
 
@@ -289,15 +289,11 @@ static int jffs2_write_end(struct file *filp, struct address_space *mapping,
 	ri->isize = cpu_to_je32((uint32_t)inode->i_size);
 	ri->atime = ri->ctime = ri->mtime = cpu_to_je32(JFFS2_NOW());
 
-	/* In 2.4, it was already kmapped by generic_file_write(). Doesn't
-	   hurt to do it again. The alternative is ifdefs, which are ugly. */
-	kmap(pg);
-
-	ret = jffs2_write_inode_range(c, f, ri, page_address(pg) + aligned_start,
-				      (pg->index << PAGE_SHIFT) + aligned_start,
+	buf = kmap_local_folio(folio, aligned_start);
+	ret = jffs2_write_inode_range(c, f, ri, buf,
+				      folio_pos(folio) + aligned_start,
 				      end - aligned_start, &writtenlen);
-
-	kunmap(pg);
+	kunmap_local(buf);
 
 	if (ret)
 		mapping_set_error(mapping, ret);
@@ -323,12 +319,12 @@ static int jffs2_write_end(struct file *filp, struct address_space *mapping,
 		   it gets reread */
 		jffs2_dbg(1, "%s(): Not all bytes written. Marking page !uptodate\n",
 			__func__);
-		ClearPageUptodate(pg);
+		folio_clear_uptodate(folio);
 	}
 
 	jffs2_dbg(1, "%s() returning %d\n",
 		  __func__, writtenlen > 0 ? writtenlen : ret);
-	unlock_page(pg);
-	put_page(pg);
+	folio_unlock(folio);
+	folio_put(folio);
 	return writtenlen > 0 ? writtenlen : ret;
 }