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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


WARNING: multiple messages have this Message-ID (diff)
From: Chao Yu <yuchao0@huawei.com>
To: jaegeuk@kernel.org
Cc: linux-kernel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net
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


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             reply	other threads:[~2018-07-05 11:38 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-07-05 11:37 Chao Yu [this message]
2018-07-05 11:37 ` [PATCH 1/2] f2fs: fix to detect looped node chain correctly Chao Yu
2018-07-05 11:37 ` [PATCH 2/2] f2fs: issue small discard by LBA order Chao Yu
2018-07-05 11:37   ` Chao Yu
2018-07-06 23:23   ` Jaegeuk Kim
2018-07-07  0:08     ` Chao Yu
2018-07-07  0:08       ` Chao Yu
2018-07-07  1:10       ` Jaegeuk Kim

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