linux-ext4 - [PATCH RFC v2 for-6.8/block 03/18] bcache: use bdev api in read

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20231211140552.973290-4-yukuai1@huaweicloud.com>
Date: Mon, 11 Dec 2023 22:05:37 +0800
From: Yu Kuai <yukuai1@...weicloud.com>
To: axboe@...nel.dk,
	roger.pau@...rix.com,
	colyli@...e.de,
	kent.overstreet@...il.com,
	joern@...ybastard.org,
	miquel.raynal@...tlin.com,
	richard@....at,
	vigneshr@...com,
	sth@...ux.ibm.com,
	hoeppner@...ux.ibm.com,
	hca@...ux.ibm.com,
	gor@...ux.ibm.com,
	agordeev@...ux.ibm.com,
	jejb@...ux.ibm.com,
	martin.petersen@...cle.com,
	clm@...com,
	josef@...icpanda.com,
	dsterba@...e.com,
	viro@...iv.linux.org.uk,
	brauner@...nel.org,
	nico@...xnic.net,
	xiang@...nel.org,
	chao@...nel.org,
	tytso@....edu,
	adilger.kernel@...ger.ca,
	agruenba@...hat.com,
	jack@...e.com,
	konishi.ryusuke@...il.com,
	willy@...radead.org,
	akpm@...ux-foundation.org,
	p.raghav@...sung.com,
	hare@...e.de
Cc: linux-block@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	xen-devel@...ts.xenproject.org,
	linux-bcache@...r.kernel.org,
	linux-mtd@...ts.infradead.org,
	linux-s390@...r.kernel.org,
	linux-scsi@...r.kernel.org,
	linux-bcachefs@...r.kernel.org,
	linux-btrfs@...r.kernel.org,
	linux-fsdevel@...r.kernel.org,
	linux-erofs@...ts.ozlabs.org,
	linux-ext4@...r.kernel.org,
	gfs2@...ts.linux.dev,
	linux-nilfs@...r.kernel.org,
	yukuai3@...wei.com,
	yukuai1@...weicloud.com,
	yi.zhang@...wei.com,
	yangerkun@...wei.com
Subject: [PATCH RFC v2 for-6.8/block 03/18] bcache: use bdev api in read_super()

From: Yu Kuai <yukuai3@...wei.com>

On the one hand covert to use folio while reading bdev inode, on the
other hand prevent to access bd_inode directly.

Signed-off-by: Yu Kuai <yukuai3@...wei.com>
---
 drivers/md/bcache/super.c | 11 +++++------
 1 file changed, 5 insertions(+), 6 deletions(-)

diff --git a/drivers/md/bcache/super.c b/drivers/md/bcache/super.c
index bfe1685dbae5..23892b32c582 100644
--- a/drivers/md/bcache/super.c
+++ b/drivers/md/bcache/super.c
@@ -168,14 +168,13 @@ static const char *read_super(struct cache_sb *sb, struct block_device *bdev,
 {
 	const char *err;
 	struct cache_sb_disk *s;
-	struct page *page;
+	struct folio *folio;
 	unsigned int i;
 
-	page = read_cache_page_gfp(bdev->bd_inode->i_mapping,
-				   SB_OFFSET >> PAGE_SHIFT, GFP_KERNEL);
-	if (IS_ERR(page))
+	folio = bdev_read_folio(bdev, SB_OFFSET);
+	if (IS_ERR(folio))
 		return "IO error";
-	s = page_address(page) + offset_in_page(SB_OFFSET);
+	s = folio_address(folio) + offset_in_folio(folio, SB_OFFSET);
 
 	sb->offset		= le64_to_cpu(s->offset);
 	sb->version		= le64_to_cpu(s->version);
@@ -272,7 +271,7 @@ static const char *read_super(struct cache_sb *sb, struct block_device *bdev,
 	*res = s;
 	return NULL;
 err:
-	put_page(page);
+	folio_put(folio);
 	return err;
 }
 
-- 
2.39.2