linux-kernel - [PATCH] f2fs: give RO message when recovering superblock

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Message-Id: <1458765499-22921-1-git-send-email-jaegeuk@kernel.org>
Date:	Wed, 23 Mar 2016 13:38:19 -0700
From:	Jaegeuk Kim <jaegeuk@...nel.org>
To:	linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
	linux-f2fs-devel@...ts.sourceforge.net
Cc:	Jaegeuk Kim <jaegeuk@...nel.org>
Subject: [PATCH] f2fs: give RO message when recovering superblock

When one of superblocks is missing, f2fs recovers it with the valid one.
But, even if f2fs is mounted as RO, we'd better notify that too.

Signed-off-by: Jaegeuk Kim <jaegeuk@...nel.org>
---
 fs/f2fs/super.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index 179304f..9c0af99 100644
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -1293,6 +1293,9 @@ int f2fs_commit_super(struct f2fs_sb_info *sbi, bool recover)
 	struct buffer_head *bh;
 	int err;
 
+	if (f2fs_readonly(sbi->sb) || bdev_read_only(sbi->sb->s_bdev))
+		return -EROFS;
+
 	/* write back-up superblock first */
 	bh = sb_getblk(sbi->sb, sbi->valid_super_block ? 0: 1);
 	if (!bh)
@@ -1560,7 +1563,7 @@ try_onemore:
 	kfree(options);
 
 	/* recover broken superblock */
-	if (recovery && !f2fs_readonly(sb) && !bdev_read_only(sb->s_bdev)) {
+	if (recovery) {
 		err = f2fs_commit_super(sbi, true);
 		f2fs_msg(sb, KERN_INFO,
 			"Try to recover %dth superblock, ret: %ld",
-- 
2.6.3