linux-kernel - [PATCH v3 3/3] mpage: use folios in bio end

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Date:   Tue, 11 Apr 2023 14:29:20 +0200
From:   Pankaj Raghav <p.raghav@...sung.com>
To:     hubcap@...ibond.com, brauner@...nel.org, martin@...ibond.com,
        willy@...radead.org, hch@....de, minchan@...nel.org,
        viro@...iv.linux.org.uk, axboe@...nel.dk,
        akpm@...ux-foundation.org, senozhatsky@...omium.org
Cc:     linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        devel@...ts.orangefs.org, linux-fsdevel@...r.kernel.org,
        linux-block@...r.kernel.org, gost.dev@...sung.com,
        mcgrof@...nel.org, Pankaj Raghav <p.raghav@...sung.com>
Subject: [PATCH v3 3/3] 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>
Reviewed-by: Christoph Hellwig <hch@....de>
---
 fs/mpage.c | 28 ++++++++++++++++++----------
 1 file changed, 18 insertions(+), 10 deletions(-)

diff --git a/fs/mpage.c b/fs/mpage.c
index d9540c1b7427..242e213ee064 100644
--- a/fs/mpage.c
+++ b/fs/mpage.c
@@ -45,24 +45,32 @@
  */
 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)
-		page_endio(bv->bv_page, REQ_OP_READ,
-			   blk_status_to_errno(bio->bi_status));
+	bio_for_each_folio_all(fi, bio) {
+		if (err)
+			folio_set_error(fi.folio);
+		else
+			folio_mark_uptodate(fi.folio);
+		folio_unlock(fi.folio);
+	}
 
 	bio_put(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)
-		page_endio(bv->bv_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