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Message-Id: <20190128234717.77225-7-jaegeuk@kernel.org>
Date: Tue, 29 Jan 2019 07:47:17 +0800
From: Jaegeuk Kim <jaegeuk@...nel.org>
To: linux-kernel@...r.kernel.org,
linux-f2fs-devel@...ts.sourceforge.net
Cc: Jaegeuk Kim <jaegeuk@...nel.org>
Subject: [PATCH 7/7] f2fs: sync filesystem after roll-forward recovery
Some works after roll-forward recovery can get an error which will release
all the data structures. Let's flush them in order to make it clean.
One possible corruption came from:
[ 90.400500] list_del corruption. prev->next should be ffffffed1f566208, but was (null)
[ 90.675349] Call trace:
[ 90.677869] __list_del_entry_valid+0x94/0xb4
[ 90.682351] remove_dirty_inode+0xac/0x114
[ 90.686563] __f2fs_write_data_pages+0x6a8/0x6c8
[ 90.691302] f2fs_write_data_pages+0x40/0x4c
[ 90.695695] do_writepages+0x80/0xf0
[ 90.699372] __writeback_single_inode+0xdc/0x4ac
[ 90.704113] writeback_sb_inodes+0x280/0x440
[ 90.708501] wb_writeback+0x1b8/0x3d0
[ 90.712267] wb_workfn+0x1a8/0x4d4
[ 90.715765] process_one_work+0x1c0/0x3d4
[ 90.719883] worker_thread+0x224/0x344
[ 90.723739] kthread+0x120/0x130
[ 90.727055] ret_from_fork+0x10/0x18
Reported-by: Sahitya Tummala <stummala@...eaurora.org>
Reviewed-by: Chao Yu <yuchao0@...wei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@...nel.org>
---
fs/f2fs/checkpoint.c | 5 +++--
fs/f2fs/node.c | 4 +++-
fs/f2fs/super.c | 44 +++++++++++++++++++++++++++++++++-----------
3 files changed, 39 insertions(+), 14 deletions(-)
diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c
index 622dca707752..03fea4efd64b 100644
--- a/fs/f2fs/checkpoint.c
+++ b/fs/f2fs/checkpoint.c
@@ -306,8 +306,9 @@ static int f2fs_write_meta_pages(struct address_space *mapping,
goto skip_write;
/* collect a number of dirty meta pages and write together */
- if (wbc->for_kupdate ||
- get_pages(sbi, F2FS_DIRTY_META) < nr_pages_to_skip(sbi, META))
+ if (wbc->sync_mode != WB_SYNC_ALL &&
+ get_pages(sbi, F2FS_DIRTY_META) <
+ nr_pages_to_skip(sbi, META))
goto skip_write;
/* if locked failed, cp will flush dirty pages instead */
diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c
index 4f450e573312..f6ff84e29749 100644
--- a/fs/f2fs/node.c
+++ b/fs/f2fs/node.c
@@ -1920,7 +1920,9 @@ static int f2fs_write_node_pages(struct address_space *mapping,
f2fs_balance_fs_bg(sbi);
/* collect a number of dirty node pages and write together */
- if (get_pages(sbi, F2FS_DIRTY_NODES) < nr_pages_to_skip(sbi, NODE))
+ if (wbc->sync_mode != WB_SYNC_ALL &&
+ get_pages(sbi, F2FS_DIRTY_NODES) <
+ nr_pages_to_skip(sbi, NODE))
goto skip_write;
if (wbc->sync_mode == WB_SYNC_ALL)
diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index 7694cb350734..384d1c248857 100644
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -1458,9 +1458,16 @@ static int f2fs_enable_quotas(struct super_block *sb);
static int f2fs_disable_checkpoint(struct f2fs_sb_info *sbi)
{
+ unsigned int s_flags = sbi->sb->s_flags;
struct cp_control cpc;
- int err;
+ int err = 0;
+ int ret;
+ if (s_flags & SB_RDONLY) {
+ f2fs_msg(sbi->sb, KERN_ERR,
+ "checkpoint=disable on readonly fs");
+ return -EINVAL;
+ }
sbi->sb->s_flags |= SB_ACTIVE;
f2fs_update_time(sbi, DISABLE_TIME);
@@ -1468,18 +1475,24 @@ static int f2fs_disable_checkpoint(struct f2fs_sb_info *sbi)
while (!f2fs_time_over(sbi, DISABLE_TIME)) {
mutex_lock(&sbi->gc_mutex);
err = f2fs_gc(sbi, true, false, NULL_SEGNO);
- if (err == -ENODATA)
+ if (err == -ENODATA) {
+ err = 0;
break;
+ }
if (err && err != -EAGAIN)
- return err;
+ break;
}
- err = sync_filesystem(sbi->sb);
- if (err)
- return err;
+ ret = sync_filesystem(sbi->sb);
+ if (ret || err) {
+ err = ret ? ret: err;
+ goto restore_flag;
+ }
- if (f2fs_disable_cp_again(sbi))
- return -EAGAIN;
+ if (f2fs_disable_cp_again(sbi)) {
+ err = -EAGAIN;
+ goto restore_flag;
+ }
mutex_lock(&sbi->gc_mutex);
cpc.reason = CP_PAUSE;
@@ -1488,7 +1501,9 @@ static int f2fs_disable_checkpoint(struct f2fs_sb_info *sbi)
sbi->unusable_block_count = 0;
mutex_unlock(&sbi->gc_mutex);
- return 0;
+restore_flag:
+ sbi->sb->s_flags = s_flags; /* Restore MS_RDONLY status */
+ return err;
}
static void f2fs_enable_checkpoint(struct f2fs_sb_info *sbi)
@@ -3369,7 +3384,7 @@ static int f2fs_fill_super(struct super_block *sb, void *data, int silent)
if (test_opt(sbi, DISABLE_CHECKPOINT)) {
err = f2fs_disable_checkpoint(sbi);
if (err)
- goto free_meta;
+ goto sync_free_meta;
} else if (is_set_ckpt_flags(sbi, CP_DISABLED_FLAG)) {
f2fs_enable_checkpoint(sbi);
}
@@ -3382,7 +3397,7 @@ static int f2fs_fill_super(struct super_block *sb, void *data, int silent)
/* After POR, we can run background GC thread.*/
err = f2fs_start_gc_thread(sbi);
if (err)
- goto free_meta;
+ goto sync_free_meta;
}
kvfree(options);
@@ -3405,6 +3420,11 @@ static int f2fs_fill_super(struct super_block *sb, void *data, int silent)
clear_sbi_flag(sbi, SBI_CP_DISABLED_QUICK);
return 0;
+sync_free_meta:
+ /* safe to flush all the data */
+ sync_filesystem(sbi->sb);
+ retry = false;
+
free_meta:
#ifdef CONFIG_QUOTA
f2fs_truncate_quota_inode_pages(sb);
@@ -3418,6 +3438,8 @@ static int f2fs_fill_super(struct super_block *sb, void *data, int silent)
* falls into an infinite loop in f2fs_sync_meta_pages().
*/
truncate_inode_pages_final(META_MAPPING(sbi));
+ /* evict some inodes being cached by GC */
+ evict_inodes(sb);
f2fs_unregister_sysfs(sbi);
free_root_inode:
dput(sb->s_root);
--
2.19.0.605.g01d371f741-goog
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