linux-kernel - [PATCH 5.13 239/351] f2fs: remove false alarm on iget failure during GC

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Message-Id: <20210719144952.847519308@linuxfoundation.org>
Date:   Mon, 19 Jul 2021 16:53:05 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Chao Yu <chao@...nel.org>,
        Jaegeuk Kim <jaegeuk@...nel.org>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.13 239/351] f2fs: remove false alarm on iget failure during GC

From: Jaegeuk Kim <jaegeuk@...nel.org>

[ Upstream commit 132e3209789c647e37dc398ef36af4de13f104b4 ]

This patch removes setting SBI_NEED_FSCK when GC gets an error on f2fs_iget,
since f2fs_iget can give ENOMEM and others by race condition.
If we set this critical fsck flag, we'll get EIO during fsync via the below
code path.

In f2fs_inplace_write_data(),

	if (is_sbi_flag_set(sbi, SBI_NEED_FSCK) || f2fs_cp_error(sbi)) {
		err = -EIO;
		goto drop_bio;
	}

Fixes: 9557727876674 ("f2fs: drop inplace IO if fs status is abnormal")
Reviewed-by: Chao Yu <chao@...nel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 fs/f2fs/gc.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c
index b40a2da90147..ab63951c08cb 100644
--- a/fs/f2fs/gc.c
+++ b/fs/f2fs/gc.c
@@ -1450,10 +1450,8 @@ next_step:
 
 		if (phase == 3) {
 			inode = f2fs_iget(sb, dni.ino);
-			if (IS_ERR(inode) || is_bad_inode(inode)) {
-				set_sbi_flag(sbi, SBI_NEED_FSCK);
+			if (IS_ERR(inode) || is_bad_inode(inode))
 				continue;
-			}
 
 			if (!down_write_trylock(
 				&F2FS_I(inode)->i_gc_rwsem[WRITE])) {
-- 
2.30.2