linux-kernel - [PATCH v2 2/2] f2fs: add f2fs_bug_on() in f2fs_quota

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Message-ID: <20250513031907.2876275-1-chao@kernel.org>
Date: Tue, 13 May 2025 11:19:07 +0800
From: Chao Yu <chao@...nel.org>
To: jaegeuk@...nel.org
Cc: linux-f2fs-devel@...ts.sourceforge.net,
	linux-kernel@...r.kernel.org,
	Chao Yu <chao@...nel.org>
Subject: [PATCH v2 2/2] f2fs: add f2fs_bug_on() in f2fs_quota_read()

mapping_read_folio_gfp() will return a folio, it should always be
uptodate, let's check folio uptodate status to detect any potenial
bug.

Signed-off-by: Chao Yu <chao@...nel.org>
---
v2:
- just add f2fs_bug_on(), get rid of error handling.
 fs/f2fs/super.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index 0ee783224953..8c77a625427c 100644
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -2973,6 +2973,12 @@ static ssize_t f2fs_quota_read(struct super_block *sb, int type, char *data,
 			goto repeat;
 		}
 
+		/*
+		 * should never happen, just leave f2fs_bug_on() here to catch
+		 * any potential bug.
+		 */
+		f2fs_bug_on(sbi, !folio_test_uptodate(folio));
+
 		memcpy_from_folio(data, folio, offset, tocopy);
 		f2fs_folio_put(folio, true);
 
-- 
2.49.0