From: Chao Yu <yuchao0@huawei.com>
To: <jaegeuk@kernel.org>
Cc: <linux-f2fs-devel@lists.sourceforge.net>,
<linux-kernel@vger.kernel.org>, <chao@kernel.org>,
Chao Yu <yuchao0@huawei.com>
Subject: [PATCH 1/2] f2fs: fix to detect looped node chain correctly
Date: Thu, 5 Jul 2018 19:37:00 +0800 [thread overview]
Message-ID: <20180705113701.3466-1-yuchao0@huawei.com> (raw)
Below dmesg was printed when testing generic/388 of fstest:
F2FS-fs (zram1): find_fsync_dnodes: detect looped node chain, blkaddr:526615, next:526616
F2FS-fs (zram1): Cannot recover all fsync data errno=-22
F2FS-fs (zram1): Mounted with checkpoint version = 22300d0e
F2FS-fs (zram1): find_fsync_dnodes: detect looped node chain, blkaddr:526615, next:526616
F2FS-fs (zram1): Cannot recover all fsync data errno=-22
The reason is that we initialize free_blocks with free blocks of
filesystem, so if filesystem is full, free_blocks can be zero,
below condition will be true, so that, it will fail recovery.
if (++loop_cnt >= free_blocks ||
blkaddr == next_blkaddr_of_node(page))
To fix this issue, initialize free_blocks with correct value which
includes over-privision blocks.
Signed-off-by: Chao Yu <yuchao0@huawei.com>
---
fs/f2fs/recovery.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/fs/f2fs/recovery.c b/fs/f2fs/recovery.c
index 3051a5e5dfc7..0d927ae26c48 100644
--- a/fs/f2fs/recovery.c
+++ b/fs/f2fs/recovery.c
@@ -241,8 +241,8 @@ static int find_fsync_dnodes(struct f2fs_sb_info *sbi, struct list_head *head,
struct page *page = NULL;
block_t blkaddr;
unsigned int loop_cnt = 0;
- unsigned int free_blocks = sbi->user_block_count -
- valid_user_blocks(sbi);
+ unsigned int free_blocks = MAIN_SEGS(sbi) * sbi->blocks_per_seg -
+ valid_user_blocks(sbi);
int err = 0;
/* get node pages in the current segment */
--
2.18.0.rc1
next reply other threads:[~2018-07-05 11:38 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-07-05 11:37 Chao Yu [this message]
2018-07-05 11:37 ` [PATCH 2/2] f2fs: issue small discard by LBA order Chao Yu
2018-07-06 23:23 ` Jaegeuk Kim
2018-07-07 0:08 ` Chao Yu
2018-07-07 1:10 ` Jaegeuk Kim
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