fs: Turn block_invalidatepage into block_invalidate_folio

Remove special-casing of a NULL invalidatepage, since there is no
more block_invalidatepage.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Tested-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
Acked-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
Tested-by: Mike Marshall <hubcap@omnibond.com> # orangefs
Tested-by: David Howells <dhowells@redhat.com> # afs

block/fops.c

@@ -430,6 +430,7 @@ static int blkdev_writepages(struct address_space *mapping,
 
 const struct address_space_operations def_blk_aops = {
 	.set_page_dirty	= __set_page_dirty_buffers,
+	.invalidate_folio = block_invalidate_folio,
 	.readpage	= blkdev_readpage,
 	.readahead	= blkdev_readahead,
 	.writepage	= blkdev_writepage,

fs/adfs/inode.c

@@ -74,6 +74,7 @@ static sector_t _adfs_bmap(struct address_space *mapping, sector_t block)
 
 static const struct address_space_operations adfs_aops = {
 	.set_page_dirty	= __set_page_dirty_buffers,
+	.invalidate_folio = block_invalidate_folio,
 	.readpage	= adfs_readpage,
 	.writepage	= adfs_writepage,
 	.write_begin	= adfs_write_begin,

fs/affs/file.c

@@ -454,6 +454,7 @@ static sector_t _affs_bmap(struct address_space *mapping, sector_t block)
 
 const struct address_space_operations affs_aops = {
 	.set_page_dirty	= __set_page_dirty_buffers,
+	.invalidate_folio = block_invalidate_folio,
 	.readpage = affs_readpage,
 	.writepage = affs_writepage,
 	.write_begin = affs_write_begin,
@@ -835,6 +836,7 @@ static int affs_write_end_ofs(struct file *file, struct address_space *mapping,
 
 const struct address_space_operations affs_aops_ofs = {
 	.set_page_dirty	= __set_page_dirty_buffers,
+	.invalidate_folio = block_invalidate_folio,
 	.readpage = affs_readpage_ofs,
 	//.writepage = affs_writepage_ofs,
 	.write_begin = affs_write_begin_ofs,

fs/bfs/file.c

@@ -189,6 +189,7 @@ static sector_t bfs_bmap(struct address_space *mapping, sector_t block)
 
 const struct address_space_operations bfs_aops = {
 	.set_page_dirty	= __set_page_dirty_buffers,
+	.invalidate_folio = block_invalidate_folio,
 	.readpage	= bfs_readpage,
 	.writepage	= bfs_writepage,
 	.write_begin	= bfs_write_begin,

fs/buffer.c

@@ -1482,41 +1482,40 @@ static void discard_buffer(struct buffer_head * bh)
 }
 
 /**
- * block_invalidatepage - invalidate part or all of a buffer-backed page
- *
- * @page: the page which is affected
+ * block_invalidate_folio - Invalidate part or all of a buffer-backed folio.
+ * @folio: The folio which is affected.
  * @offset: start of the range to invalidate
  * @length: length of the range to invalidate
  *
- * block_invalidatepage() is called when all or part of the page has become
+ * block_invalidate_folio() is called when all or part of the folio has been
  * invalidated by a truncate operation.
  *
- * block_invalidatepage() does not have to release all buffers, but it must
+ * block_invalidate_folio() does not have to release all buffers, but it must
  * ensure that no dirty buffer is left outside @offset and that no I/O
  * is underway against any of the blocks which are outside the truncation
  * point.  Because the caller is about to free (and possibly reuse) those
  * blocks on-disk.
  */
-void block_invalidatepage(struct page *page, unsigned int offset,
-			  unsigned int length)
+void block_invalidate_folio(struct folio *folio, size_t offset, size_t length)
 {
 	struct buffer_head *head, *bh, *next;
-	unsigned int curr_off = 0;
-	unsigned int stop = length + offset;
+	size_t curr_off = 0;
+	size_t stop = length + offset;
 
-	BUG_ON(!PageLocked(page));
-	if (!page_has_buffers(page))
-		goto out;
+	BUG_ON(!folio_test_locked(folio));
 
 	/*
 	 * Check for overflow
 	 */
-	BUG_ON(stop > PAGE_SIZE || stop < length);
+	BUG_ON(stop > folio_size(folio) || stop < length);
+
+	head = folio_buffers(folio);
+	if (!head)
+		return;
 
-	head = page_buffers(page);
 	bh = head;
 	do {
-		unsigned int next_off = curr_off + bh->b_size;
+		size_t next_off = curr_off + bh->b_size;
 		next = bh->b_this_page;
 
 		/*
@@ -1535,16 +1534,16 @@ void block_invalidatepage(struct page *page, unsigned int offset,
 	} while (bh != head);
 
 	/*
-	 * We release buffers only if the entire page is being invalidated.
+	 * We release buffers only if the entire folio is being invalidated.
 	 * The get_block cached value has been unconditionally invalidated,
 	 * so real IO is not possible anymore.
 	 */
-	if (length == PAGE_SIZE)
-		try_to_release_page(page, 0);
+	if (length == folio_size(folio))
+		filemap_release_folio(folio, 0);
 out:
 	return;
 }
-EXPORT_SYMBOL(block_invalidatepage);
+EXPORT_SYMBOL(block_invalidate_folio);
 
 
 /*

fs/ecryptfs/mmap.c

@@ -546,6 +546,7 @@ const struct address_space_operations ecryptfs_aops = {
 	 */
 #ifdef CONFIG_BLOCK
 	.set_page_dirty = __set_page_dirty_buffers,
+	.invalidate_folio = block_invalidate_folio,
 #endif
 	.writepage = ecryptfs_writepage,
 	.readpage = ecryptfs_readpage,

fs/exfat/inode.c

@@ -491,6 +491,7 @@ int exfat_block_truncate_page(struct inode *inode, loff_t from)
 
 static const struct address_space_operations exfat_aops = {
 	.set_page_dirty	= __set_page_dirty_buffers,
+	.invalidate_folio = block_invalidate_folio,
 	.readpage	= exfat_readpage,
 	.readahead	= exfat_readahead,
 	.writepage	= exfat_writepage,

fs/ext2/inode.c

@@ -968,6 +968,7 @@ ext2_dax_writepages(struct address_space *mapping, struct writeback_control *wbc
 
 const struct address_space_operations ext2_aops = {
 	.set_page_dirty		= __set_page_dirty_buffers,
+	.invalidate_folio = block_invalidate_folio,
 	.readpage		= ext2_readpage,
 	.readahead		= ext2_readahead,
 	.writepage		= ext2_writepage,
@@ -983,6 +984,7 @@ const struct address_space_operations ext2_aops = {
 
 const struct address_space_operations ext2_nobh_aops = {
 	.set_page_dirty		= __set_page_dirty_buffers,
+	.invalidate_folio = block_invalidate_folio,
 	.readpage		= ext2_readpage,
 	.readahead		= ext2_readahead,
 	.writepage		= ext2_nobh_writepage,

fs/ext4/inode.c

@@ -137,8 +137,6 @@ static inline int ext4_begin_ordered_truncate(struct inode *inode,
 						   new_size);
 }
 
-static void ext4_invalidatepage(struct page *page, unsigned int offset,
-				unsigned int length);
 static int __ext4_journalled_writepage(struct page *page, unsigned int len);
 static int ext4_meta_trans_blocks(struct inode *inode, int lblocks,
 				  int pextents);
@@ -1571,16 +1569,18 @@ static void mpage_release_unused_pages(struct mpage_da_data *mpd,
 			break;
 		for (i = 0; i < nr_pages; i++) {
 			struct page *page = pvec.pages[i];
+			struct folio *folio = page_folio(page);
 
-			BUG_ON(!PageLocked(page));
-			BUG_ON(PageWriteback(page));
+			BUG_ON(!folio_test_locked(folio));
+			BUG_ON(folio_test_writeback(folio));
 			if (invalidate) {
-				if (page_mapped(page))
-					clear_page_dirty_for_io(page);
-				block_invalidatepage(page, 0, PAGE_SIZE);
-				ClearPageUptodate(page);
+				if (folio_mapped(folio))
+					folio_clear_dirty_for_io(folio);
+				block_invalidate_folio(folio, 0,
+						folio_size(folio));
+				folio_clear_uptodate(folio);
 			}
-			unlock_page(page);
+			folio_unlock(folio);
 		}
 		pagevec_release(&pvec);
 	}
@@ -3183,15 +3183,15 @@ static void ext4_readahead(struct readahead_control *rac)
 	ext4_mpage_readpages(inode, rac, NULL);
 }
 
-static void ext4_invalidatepage(struct page *page, unsigned int offset,
-				unsigned int length)
+static void ext4_invalidate_folio(struct folio *folio, size_t offset,
+				size_t length)
 {
-	trace_ext4_invalidatepage(page, offset, length);
+	trace_ext4_invalidatepage(&folio->page, offset, length);
 
 	/* No journalling happens on data buffers when this function is used */
-	WARN_ON(page_has_buffers(page) && buffer_jbd(page_buffers(page)));
+	WARN_ON(folio_buffers(folio) && buffer_jbd(folio_buffers(folio)));
 
-	block_invalidatepage(page, offset, length);
+	block_invalidate_folio(folio, offset, length);
 }
 
 static int __ext4_journalled_invalidatepage(struct page *page,
@@ -3583,7 +3583,7 @@ static const struct address_space_operations ext4_aops = {
 	.write_end		= ext4_write_end,
 	.set_page_dirty		= ext4_set_page_dirty,
 	.bmap			= ext4_bmap,
-	.invalidatepage		= ext4_invalidatepage,
+	.invalidate_folio	= ext4_invalidate_folio,
 	.releasepage		= ext4_releasepage,
 	.direct_IO		= noop_direct_IO,
 	.migratepage		= buffer_migrate_page,
@@ -3618,7 +3618,7 @@ static const struct address_space_operations ext4_da_aops = {
 	.write_end		= ext4_da_write_end,
 	.set_page_dirty		= ext4_set_page_dirty,
 	.bmap			= ext4_bmap,
-	.invalidatepage		= ext4_invalidatepage,
+	.invalidate_folio	= ext4_invalidate_folio,
 	.releasepage		= ext4_releasepage,
 	.direct_IO		= noop_direct_IO,
 	.migratepage		= buffer_migrate_page,

fs/fat/inode.c

@@ -343,6 +343,7 @@ int fat_block_truncate_page(struct inode *inode, loff_t from)
 
 static const struct address_space_operations fat_aops = {
 	.set_page_dirty	= __set_page_dirty_buffers,
+	.invalidate_folio = block_invalidate_folio,
 	.readpage	= fat_readpage,
 	.readahead	= fat_readahead,
 	.writepage	= fat_writepage,

fs/gfs2/meta_io.c

@@ -90,12 +90,14 @@ static int gfs2_aspace_writepage(struct page *page, struct writeback_control *wb
 
 const struct address_space_operations gfs2_meta_aops = {
 	.set_page_dirty	= __set_page_dirty_buffers,
+	.invalidate_folio = block_invalidate_folio,
 	.writepage = gfs2_aspace_writepage,
 	.releasepage = gfs2_releasepage,
 };
 
 const struct address_space_operations gfs2_rgrp_aops = {
 	.set_page_dirty	= __set_page_dirty_buffers,
+	.invalidate_folio = block_invalidate_folio,
 	.writepage = gfs2_aspace_writepage,
 	.releasepage = gfs2_releasepage,
 };

fs/hfs/inode.c

@@ -160,6 +160,7 @@ static int hfs_writepages(struct address_space *mapping,
 
 const struct address_space_operations hfs_btree_aops = {
 	.set_page_dirty	= __set_page_dirty_buffers,
+	.invalidate_folio = block_invalidate_folio,
 	.readpage	= hfs_readpage,
 	.writepage	= hfs_writepage,
 	.write_begin	= hfs_write_begin,
@@ -170,6 +171,7 @@ const struct address_space_operations hfs_btree_aops = {
 
 const struct address_space_operations hfs_aops = {
 	.set_page_dirty	= __set_page_dirty_buffers,
+	.invalidate_folio = block_invalidate_folio,
 	.readpage	= hfs_readpage,
 	.writepage	= hfs_writepage,
 	.write_begin	= hfs_write_begin,

fs/hfsplus/inode.c

@@ -157,6 +157,7 @@ static int hfsplus_writepages(struct address_space *mapping,
 
 const struct address_space_operations hfsplus_btree_aops = {
 	.set_page_dirty	= __set_page_dirty_buffers,
+	.invalidate_folio = block_invalidate_folio,
 	.readpage	= hfsplus_readpage,
 	.writepage	= hfsplus_writepage,
 	.write_begin	= hfsplus_write_begin,
@@ -167,6 +168,7 @@ const struct address_space_operations hfsplus_btree_aops = {
 
 const struct address_space_operations hfsplus_aops = {
 	.set_page_dirty	= __set_page_dirty_buffers,
+	.invalidate_folio = block_invalidate_folio,
 	.readpage	= hfsplus_readpage,
 	.writepage	= hfsplus_writepage,
 	.write_begin	= hfsplus_write_begin,

fs/hpfs/file.c

@@ -246,6 +246,7 @@ static int hpfs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
 
 const struct address_space_operations hpfs_aops = {
 	.set_page_dirty	= __set_page_dirty_buffers,
+	.invalidate_folio = block_invalidate_folio,
 	.readpage = hpfs_readpage,
 	.writepage = hpfs_writepage,
 	.readahead = hpfs_readahead,

fs/jfs/inode.c

@@ -358,6 +358,7 @@ static ssize_t jfs_direct_IO(struct kiocb *iocb, struct iov_iter *iter)
 
 const struct address_space_operations jfs_aops = {
 	.set_page_dirty	= __set_page_dirty_buffers,
+	.invalidate_folio = block_invalidate_folio,
 	.readpage	= jfs_readpage,
 	.readahead	= jfs_readahead,
 	.writepage	= jfs_writepage,

fs/minix/inode.c

@@ -443,6 +443,7 @@ static sector_t minix_bmap(struct address_space *mapping, sector_t block)
 
 static const struct address_space_operations minix_aops = {
 	.set_page_dirty	= __set_page_dirty_buffers,
+	.invalidate_folio = block_invalidate_folio,
 	.readpage = minix_readpage,
 	.writepage = minix_writepage,
 	.write_begin = minix_write_begin,

fs/nilfs2/inode.c

@@ -304,7 +304,7 @@ const struct address_space_operations nilfs_aops = {
 	.write_begin		= nilfs_write_begin,
 	.write_end		= nilfs_write_end,
 	/* .releasepage		= nilfs_releasepage, */
-	.invalidatepage		= block_invalidatepage,
+	.invalidate_folio	= block_invalidate_folio,
 	.direct_IO		= nilfs_direct_IO,
 	.is_partially_uptodate  = block_is_partially_uptodate,
 };

fs/nilfs2/mdt.c

@@ -435,6 +435,7 @@ nilfs_mdt_write_page(struct page *page, struct writeback_control *wbc)
 
 static const struct address_space_operations def_mdt_aops = {
 	.set_page_dirty		= __set_page_dirty_buffers,
+	.invalidate_folio = block_invalidate_folio,
 	.writepage		= nilfs_mdt_write_page,
 };
 

fs/ntfs/aops.c

@@ -1350,12 +1350,13 @@ static int ntfs_writepage(struct page *page, struct writeback_control *wbc)
 	/* Is the page fully outside i_size? (truncate in progress) */
 	if (unlikely(page->index >= (i_size + PAGE_SIZE - 1) >>
 			PAGE_SHIFT)) {
+		struct folio *folio = page_folio(page);
 		/*
 		 * The page may have dirty, unmapped buffers.  Make them
 		 * freeable here, so the page does not leak.
 		 */
-		block_invalidatepage(page, 0, PAGE_SIZE);
-		unlock_page(page);
+		block_invalidate_folio(folio, 0, folio_size(folio));
+		folio_unlock(folio);
 		ntfs_debug("Write outside i_size - truncated?");
 		return 0;
 	}

fs/ocfs2/aops.c

@@ -2461,7 +2461,7 @@ const struct address_space_operations ocfs2_aops = {
 	.write_end		= ocfs2_write_end,
 	.bmap			= ocfs2_bmap,
 	.direct_IO		= ocfs2_direct_IO,
-	.invalidatepage		= block_invalidatepage,
+	.invalidate_folio	= block_invalidate_folio,
 	.releasepage		= ocfs2_releasepage,
 	.migratepage		= buffer_migrate_page,
 	.is_partially_uptodate	= block_is_partially_uptodate,

fs/omfs/file.c

@@ -373,6 +373,7 @@ const struct inode_operations omfs_file_inops = {
 
 const struct address_space_operations omfs_aops = {
 	.set_page_dirty = __set_page_dirty_buffers,
+	.invalidate_folio = block_invalidate_folio,
 	.readpage = omfs_readpage,
 	.readahead = omfs_readahead,
 	.writepage = omfs_writepage,

fs/sysv/itree.c

@@ -496,6 +496,7 @@ static sector_t sysv_bmap(struct address_space *mapping, sector_t block)
 
 const struct address_space_operations sysv_aops = {
 	.set_page_dirty = __set_page_dirty_buffers,
+	.invalidate_folio = block_invalidate_folio,
 	.readpage = sysv_readpage,
 	.writepage = sysv_writepage,
 	.write_begin = sysv_write_begin,

fs/udf/file.c

@@ -126,6 +126,7 @@ static int udf_adinicb_write_end(struct file *file, struct address_space *mappin
 
 const struct address_space_operations udf_adinicb_aops = {
 	.set_page_dirty	= __set_page_dirty_buffers,
+	.invalidate_folio = block_invalidate_folio,
 	.readpage	= udf_adinicb_readpage,
 	.writepage	= udf_adinicb_writepage,
 	.write_begin	= udf_adinicb_write_begin,

fs/udf/inode.c

@@ -236,6 +236,7 @@ static sector_t udf_bmap(struct address_space *mapping, sector_t block)
 
 const struct address_space_operations udf_aops = {
 	.set_page_dirty	= __set_page_dirty_buffers,
+	.invalidate_folio = block_invalidate_folio,
 	.readpage	= udf_readpage,
 	.readahead	= udf_readahead,
 	.writepage	= udf_writepage,

fs/ufs/inode.c

@@ -527,6 +527,7 @@ static sector_t ufs_bmap(struct address_space *mapping, sector_t block)
 
 const struct address_space_operations ufs_aops = {
 	.set_page_dirty = __set_page_dirty_buffers,
+	.invalidate_folio = block_invalidate_folio,
 	.readpage = ufs_readpage,
 	.writepage = ufs_writepage,
 	.write_begin = ufs_write_begin,

include/linux/buffer_head.h

@@ -217,8 +217,7 @@ extern int buffer_heads_over_limit;
  * Generic address_space_operations implementations for buffer_head-backed
  * address_spaces.
  */
-void block_invalidatepage(struct page *page, unsigned int offset,
-			  unsigned int length);
+void block_invalidate_folio(struct folio *folio, size_t offset, size_t length);
 int block_write_full_page(struct page *page, get_block_t *get_block,
 				struct writeback_control *wbc);
 int __block_write_full_page(struct inode *inode, struct page *page,

mm/truncate.c

@@ -163,10 +163,6 @@ void folio_invalidate(struct folio *folio, size_t offset, size_t length)
 	}
 
 	invalidatepage = aops->invalidatepage;
-#ifdef CONFIG_BLOCK
-	if (!invalidatepage)
-		invalidatepage = block_invalidatepage;
-#endif
 	if (invalidatepage)
 		(*invalidatepage)(&folio->page, offset, length);
 }