[PATCH 17/27] f2fs: Add f2fs_get_node_folio()

["Matthew Wilcox (Oracle)" <willy@xxxxxxxxxxxxx>]

Change __get_node_page() to return a folio and convert back to a page in
f2fs_get_node_page() and f2fs_get_node_page_ra().

Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
---
 fs/f2fs/f2fs.h |  1 +
 fs/f2fs/node.c | 18 +++++++++++++-----
 2 files changed, 14 insertions(+), 5 deletions(-)

diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index bbaa61da83a8..8f23bb082c6f 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -3689,6 +3689,7 @@ struct page *f2fs_new_inode_page(struct inode *inode);
 struct page *f2fs_new_node_page(struct dnode_of_data *dn, unsigned int ofs);
 void f2fs_ra_node_page(struct f2fs_sb_info *sbi, nid_t nid);
 struct page *f2fs_get_node_page(struct f2fs_sb_info *sbi, pgoff_t nid);
+struct folio *f2fs_get_node_folio(struct f2fs_sb_info *sbi, pgoff_t nid);
 struct page *f2fs_get_node_page_ra(struct page *parent, int start);
 int f2fs_move_node_page(struct page *node_page, int gc_type);
 void f2fs_flush_inline_data(struct f2fs_sb_info *sbi);
diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c
index da28e295c701..2d161ddda9c3 100644
--- a/fs/f2fs/node.c
+++ b/fs/f2fs/node.c
@@ -1449,7 +1449,7 @@ void f2fs_ra_node_page(struct f2fs_sb_info *sbi, nid_t nid)
 	f2fs_put_page(apage, err ? 1 : 0);
 }
 
-static struct page *__get_node_page(struct f2fs_sb_info *sbi, pgoff_t nid,
+static struct folio *__get_node_folio(struct f2fs_sb_info *sbi, pgoff_t nid,
 					struct page *parent, int start)
 {
 	struct folio *folio;
@@ -1462,7 +1462,7 @@ static struct page *__get_node_page(struct f2fs_sb_info *sbi, pgoff_t nid,
 repeat:
 	folio = f2fs_grab_cache_folio(NODE_MAPPING(sbi), nid, false);
 	if (IS_ERR(folio))
-		return ERR_CAST(folio);
+		return folio;
 
 	err = read_node_page(&folio->page, 0);
 	if (err < 0) {
@@ -1493,7 +1493,7 @@ static struct page *__get_node_page(struct f2fs_sb_info *sbi, pgoff_t nid,
 	}
 page_hit:
 	if (likely(nid == nid_of_node(&folio->page)))
-		return &folio->page;
+		return folio;
 
 	f2fs_warn(sbi, "inconsistent node block, nid:%lu, node_footer[nid:%u,ino:%u,ofs:%u,cpver:%llu,blkaddr:%u]",
 			  nid, nid_of_node(&folio->page), ino_of_node(&folio->page),
@@ -1512,17 +1512,25 @@ static struct page *__get_node_page(struct f2fs_sb_info *sbi, pgoff_t nid,
 	return ERR_PTR(err);
 }
 
+struct folio *f2fs_get_node_folio(struct f2fs_sb_info *sbi, pgoff_t nid)
+{
+	return __get_node_folio(sbi, nid, NULL, 0);
+}
+
 struct page *f2fs_get_node_page(struct f2fs_sb_info *sbi, pgoff_t nid)
 {
-	return __get_node_page(sbi, nid, NULL, 0);
+	struct folio *folio = __get_node_folio(sbi, nid, NULL, 0);
+
+	return &folio->page;
 }
 
 struct page *f2fs_get_node_page_ra(struct page *parent, int start)
 {
 	struct f2fs_sb_info *sbi = F2FS_P_SB(parent);
 	nid_t nid = get_nid(parent, start, false);
+	struct folio *folio = __get_node_folio(sbi, nid, parent, start);
 
-	return __get_node_page(sbi, nid, parent, start);
+	return &folio->page;
 }
 
 static void flush_inline_data(struct f2fs_sb_info *sbi, nid_t ino)
-- 
2.47.2