ocfs2: convert ocfs2_duplicate_clusters_by_page() to use a folio

Retrieve folios from the page cache, not pages, and use a folio throughout
this function.  Removes seven calls to compound_head().

Link: https://lkml.kernel.org/r/20241205171653.3179945-18-willy@infradead.org
Signed-off-by: Mark Tinguely <mark.tinguely@oracle.com>
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Joseph Qi <joseph.qi@linux.alibaba.com>
Cc: Changwei Ge <gechangwei@live.cn>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Jun Piao <piaojun@huawei.com>
Cc: Junxiao Bi <junxiao.bi@oracle.com>
Cc: Mark Fasheh <mark@fasheh.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

1 files changed, 15 insertions, 17 deletions

diff --git a/fs/ocfs2/refcounttree.c b/fs/ocfs2/refcounttree.c
index 73caf991ede5..1d7325d4411f 100644
--- a/fs/ocfs2/refcounttree.c
+++ b/fs/ocfs2/refcounttree.c
@@ -2902,7 +2902,6 @@ int ocfs2_duplicate_clusters_by_page(handle_t *handle,
 	int ret = 0, partial;
 	struct super_block *sb = inode->i_sb;
 	u64 new_block = ocfs2_clusters_to_blocks(sb, new_cluster);
-	struct page *page;
 	pgoff_t page_index;
 	unsigned int from, to;
 	loff_t offset, end, map_end;
@@ -2921,6 +2920,7 @@ int ocfs2_duplicate_clusters_by_page(handle_t *handle,
 		end = i_size_read(inode);
 
 	while (offset < end) {
+		struct folio *folio;
 		page_index = offset >> PAGE_SHIFT;
 		map_end = ((loff_t)page_index + 1) << PAGE_SHIFT;
 		if (map_end > end)
@@ -2933,9 +2933,10 @@ int ocfs2_duplicate_clusters_by_page(handle_t *handle,
 			to = map_end & (PAGE_SIZE - 1);
 
 retry:
-		page = find_or_create_page(mapping, page_index, GFP_NOFS);
-		if (!page) {
-			ret = -ENOMEM;
+		folio = __filemap_get_folio(mapping, page_index,
+				FGP_LOCK | FGP_ACCESSED | FGP_CREAT, GFP_NOFS);
+		if (IS_ERR(folio)) {
+			ret = PTR_ERR(folio);
 			mlog_errno(ret);
 			break;
 		}
@@ -2945,9 +2946,9 @@ retry:
 		 * page, so write it back.
 		 */
 		if (PAGE_SIZE <= OCFS2_SB(sb)->s_clustersize) {
-			if (PageDirty(page)) {
-				unlock_page(page);
-				put_page(page);
+			if (folio_test_dirty(folio)) {
+				folio_unlock(folio);
+				folio_put(folio);
 
 				ret = filemap_write_and_wait_range(mapping,
 						offset, map_end - 1);
@@ -2955,9 +2956,7 @@ retry:
 			}
 		}
 
-		if (!PageUptodate(page)) {
-			struct folio *folio = page_folio(page);
-
+		if (!folio_test_uptodate(folio)) {
 			ret = block_read_full_folio(folio, ocfs2_get_block);
 			if (ret) {
 				mlog_errno(ret);
@@ -2966,8 +2965,8 @@ retry:
 			folio_lock(folio);
 		}
 
-		if (page_has_buffers(page)) {
-			ret = walk_page_buffers(handle, page_buffers(page),
+		if (folio_buffers(folio)) {
+			ret = walk_page_buffers(handle, folio_buffers(folio),
 						from, to, &partial,
 						ocfs2_clear_cow_buffer);
 			if (ret) {
@@ -2978,12 +2977,11 @@ retry:
 
 		ocfs2_map_and_dirty_page(inode,
 					 handle, from, to,
-					 page, 0, &new_block);
-		mark_page_accessed(page);
+					 &folio->page, 0, &new_block);
+		folio_mark_accessed(folio);
 unlock:
-		unlock_page(page);
-		put_page(page);
-		page = NULL;
+		folio_unlock(folio);
+		folio_put(folio);
 		offset = map_end;
 		if (ret)
 			break;