linux-kernel - [PATCH v2 4/5] mpage: use folios in bio end

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Date:   Mon,  3 Apr 2023 15:22:20 +0200
From:   Pankaj Raghav <p.raghav@...sung.com>
To:     axboe@...nel.dk, minchan@...nel.org, martin@...ibond.com,
        hubcap@...ibond.com, brauner@...nel.org, viro@...iv.linux.org.uk,
        senozhatsky@...omium.org, akpm@...ux-foundation.org,
        willy@...radead.org, hch@....de
Cc:     devel@...ts.orangefs.org, mcgrof@...nel.org,
        linux-block@...r.kernel.org, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org, gost.dev@...sung.com,
        linux-fsdevel@...r.kernel.org, Pankaj Raghav <p.raghav@...sung.com>
Subject: [PATCH v2 4/5] mpage: use folios in bio end_io handler

Use folios in the bio end_io handler. This conversion does the appropriate
handling on the folios in the respective end_io callback and removes the
call to page_endio(), which is soon to be removed.

Signed-off-by: Pankaj Raghav <p.raghav@...sung.com>
---
 fs/mpage.c | 28 ++++++++++++++++------------
 1 file changed, 16 insertions(+), 12 deletions(-)

diff --git a/fs/mpage.c b/fs/mpage.c
index 3a545bf0f184..6f43b7c9d4de 100644
--- a/fs/mpage.c
+++ b/fs/mpage.c
@@ -45,13 +45,15 @@
  */
 static void mpage_read_end_io(struct bio *bio)
 {
-	struct bio_vec *bv;
-	struct bvec_iter_all iter_all;
+	struct folio_iter fi;
+	int err = blk_status_to_errno(bio->bi_status);
 
-	bio_for_each_segment_all(bv, bio, iter_all) {
-		struct page *page = bv->bv_page;
-		page_endio(page, REQ_OP_READ,
-			   blk_status_to_errno(bio->bi_status));
+	bio_for_each_folio_all(fi, bio) {
+		if (!err)
+			folio_mark_uptodate(fi.folio);
+		else
+			folio_set_error(fi.folio);
+		folio_unlock(fi.folio);
 	}
 
 	bio_put(bio);
@@ -59,13 +61,15 @@ static void mpage_read_end_io(struct bio *bio)
 
 static void mpage_write_end_io(struct bio *bio)
 {
-	struct bio_vec *bv;
-	struct bvec_iter_all iter_all;
+	struct folio_iter fi;
+	int err = blk_status_to_errno(bio->bi_status);
 
-	bio_for_each_segment_all(bv, bio, iter_all) {
-		struct page *page = bv->bv_page;
-		page_endio(page, REQ_OP_WRITE,
-			   blk_status_to_errno(bio->bi_status));
+	bio_for_each_folio_all(fi, bio) {
+		if (err) {
+			folio_set_error(fi.folio);
+			mapping_set_error(fi.folio->mapping, err);
+		}
+		folio_end_writeback(fi.folio);
 	}
 
 	bio_put(bio);
-- 
2.34.1