[RFC PATCH 5/9] f2fs:Refactor `f2fs_is_compressed_page` to `f2fs_is_compressed_folio`

[Nanzhe Zhao <nzzhao@xxxxxxx>]

`f2fs_is_compressed_page` now already accept a folio as
a parameter.So the name now is confusing.
Rename it to `f2fs_is_compressed_folio`.
If a folio has f2fs_iomap_folio_state then it must not be
a compressed folio.

Signed-off-by: Nanzhe Zhao <nzzhao@xxxxxxx>
---
 fs/f2fs/compress.c | 11 ++++++-----
 fs/f2fs/data.c     | 10 +++++-----
 fs/f2fs/f2fs.h     |  7 +++++--
 3 files changed, 16 insertions(+), 12 deletions(-)

diff --git a/fs/f2fs/compress.c b/fs/f2fs/compress.c
index 6ad8d3bc6df7..627013ef856c 100644
--- a/fs/f2fs/compress.c
+++ b/fs/f2fs/compress.c
@@ -71,13 +71,14 @@ static pgoff_t start_idx_of_cluster(struct compress_ctx *cc)
 	return cc->cluster_idx << cc->log_cluster_size;
 }
 
-bool f2fs_is_compressed_page(struct folio *folio)
+bool f2fs_is_compressed_folio(struct folio *folio)
 {
-	if (!folio->private)
+	if (!folio_test_private(folio))
 		return false;
 	if (folio_test_f2fs_nonpointer(folio))
 		return false;
-
+	if (folio_get_f2fs_ifs(folio)) /*compressed folio current don't support higer order*/
+		return false;
 	f2fs_bug_on(F2FS_F_SB(folio),
 		*((u32 *)folio->private) != F2FS_COMPRESSED_PAGE_MAGIC);
 	return true;
@@ -1483,8 +1484,8 @@ void f2fs_compress_write_end_io(struct bio *bio, struct folio *folio)
 	struct page *page = &folio->page;
 	struct f2fs_sb_info *sbi = bio->bi_private;
 	struct compress_io_ctx *cic = folio->private;
-	enum count_type type = WB_DATA_TYPE(folio,
-				f2fs_is_compressed_page(folio));
+	enum count_type type =
+		WB_DATA_TYPE(folio, f2fs_is_compressed_folio(folio));
 	int i;
 
 	if (unlikely(bio->bi_status != BLK_STS_OK))
diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index 5589280294c1..a9dc2572bdc4 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -142,7 +142,7 @@ static void f2fs_finish_read_bio(struct bio *bio, bool in_task)
 	bio_for_each_folio_all(fi, bio) {
 		struct folio *folio = fi.folio;
 
-		if (f2fs_is_compressed_page(folio)) {
+		if (f2fs_is_compressed_folio(folio)) {
 			if (ctx && !ctx->decompression_attempted)
 				f2fs_end_read_compressed_page(folio, true, 0,
 							in_task);
@@ -186,7 +186,7 @@ static void f2fs_verify_bio(struct work_struct *work)
 		bio_for_each_folio_all(fi, bio) {
 			struct folio *folio = fi.folio;
 
-			if (!f2fs_is_compressed_page(folio) &&
+			if (!f2fs_is_compressed_folio(folio) &&
 			    !fsverity_verify_page(&folio->page)) {
 				bio->bi_status = BLK_STS_IOERR;
 				break;
@@ -239,7 +239,7 @@ static void f2fs_handle_step_decompress(struct bio_post_read_ctx *ctx,
 	bio_for_each_folio_all(fi, ctx->bio) {
 		struct folio *folio = fi.folio;
 
-		if (f2fs_is_compressed_page(folio))
+		if (f2fs_is_compressed_folio(folio))
 			f2fs_end_read_compressed_page(folio, false, blkaddr,
 						      in_task);
 		else
@@ -344,7 +344,7 @@ static void f2fs_write_end_io(struct bio *bio)
 		}
 
 #ifdef CONFIG_F2FS_FS_COMPRESSION
-		if (f2fs_is_compressed_page(folio)) {
+		if (f2fs_is_compressed_folio(folio)) {
 			f2fs_compress_write_end_io(bio, folio);
 			continue;
 		}
@@ -568,7 +568,7 @@ static bool __has_merged_page(struct bio *bio, struct inode *inode,
 			if (IS_ERR(target))
 				continue;
 		}
-		if (f2fs_is_compressed_page(target)) {
+		if (f2fs_is_compressed_folio(target)) {
 			target = f2fs_compress_control_folio(target);
 			if (IS_ERR(target))
 				continue;
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index a14bef4dc394..9f88be53174b 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -4677,7 +4677,7 @@ enum cluster_check_type {
 	CLUSTER_COMPR_BLKS, /* return # of compressed blocks in a cluster */
 	CLUSTER_RAW_BLKS    /* return # of raw blocks in a cluster */
 };
-bool f2fs_is_compressed_page(struct folio *folio);
+bool f2fs_is_compressed_folio(struct folio *folio);
 struct folio *f2fs_compress_control_folio(struct folio *folio);
 int f2fs_prepare_compress_overwrite(struct inode *inode,
 			struct page **pagep, pgoff_t index, void **fsdata);
@@ -4744,7 +4744,10 @@ void f2fs_invalidate_compress_pages(struct f2fs_sb_info *sbi, nid_t ino);
 		sbi->compr_saved_block += diff;				\
 	} while (0)
 #else
-static inline bool f2fs_is_compressed_page(struct folio *folio) { return false; }
+static inline bool f2fs_is_compressed_folio(struct folio *folio)
+{
+	return false;
+}
 static inline bool f2fs_is_compress_backend_ready(struct inode *inode)
 {
 	if (!f2fs_compressed_file(inode))
-- 
2.34.1