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Subject[PATCH] f2fs: avoid attaching SB_ACTIVE flag during mount/remount
Date
Quoted from [1]

"I do remember that I've added this code back then because otherwise
orphan cleanup was losing updates to quota files. But you're right
that now I don't see how that could be happening and it would be nice
if we could get rid of this hack"

[1] https://lore.kernel.org/linux-ext4/99cce8ca-e4a0-7301-840f-2ace67c551f3@huawei.com/T/#m04990cfbc4f44592421736b504afcc346b2a7c00

Related fix in ext4 by
commit 72ffb49a7b62 ("ext4: do not set SB_ACTIVE in ext4_orphan_cleanup()").

f2fs has the same hack implementation in
- f2fs_recover_orphan_inodes()
- f2fs_recover_fsync_data()
- f2fs_disable_checkpoint()

Let's get rid of this hack as well in f2fs.

Cc: Zhang Yi <yi.zhang@huawei.com>
Cc: Jan Kara <jack@suse.cz>
Signed-off-by: Chao Yu <yuchao0@huawei.com>
---
fs/f2fs/checkpoint.c | 3 ---
fs/f2fs/recovery.c | 8 ++------
fs/f2fs/super.c | 11 ++++-------
3 files changed, 6 insertions(+), 16 deletions(-)

diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c
index 6c208108d69c..a578c7d13d81 100644
--- a/fs/f2fs/checkpoint.c
+++ b/fs/f2fs/checkpoint.c
@@ -691,9 +691,6 @@ int f2fs_recover_orphan_inodes(struct f2fs_sb_info *sbi)
}

#ifdef CONFIG_QUOTA
- /* Needed for iput() to work correctly and not trash data */
- sbi->sb->s_flags |= SB_ACTIVE;
-
/*
* Turn on quotas which were not enabled for read-only mounts if
* filesystem has quota feature, so that they are updated correctly.
diff --git a/fs/f2fs/recovery.c b/fs/f2fs/recovery.c
index 4b2f7d1d5bf4..4cfe36fa41be 100644
--- a/fs/f2fs/recovery.c
+++ b/fs/f2fs/recovery.c
@@ -782,8 +782,6 @@ int f2fs_recover_fsync_data(struct f2fs_sb_info *sbi, bool check_only)
}

#ifdef CONFIG_QUOTA
- /* Needed for iput() to work correctly and not trash data */
- sbi->sb->s_flags |= SB_ACTIVE;
/* Turn on quotas so that they are updated correctly */
quota_enabled = f2fs_enable_quota_files(sbi, s_flags & SB_RDONLY);
#endif
@@ -811,10 +809,8 @@ int f2fs_recover_fsync_data(struct f2fs_sb_info *sbi, bool check_only)
err = recover_data(sbi, &inode_list, &tmp_inode_list, &dir_list);
if (!err)
f2fs_bug_on(sbi, !list_empty(&inode_list));
- else {
- /* restore s_flags to let iput() trash data */
- sbi->sb->s_flags = s_flags;
- }
+ else
+ f2fs_bug_on(sbi, sbi->sb->s_flags & SB_ACTIVE);
skip:
fix_curseg_write_pointer = !check_only || list_empty(&inode_list);

diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index 0a77808ebb8f..e7bd983fbddc 100644
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -1881,17 +1881,15 @@ 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 = 0;
int ret;
block_t unusable;

- if (s_flags & SB_RDONLY) {
+ if (sbi->sb->s_flags & SB_RDONLY) {
f2fs_err(sbi, "checkpoint=disable on readonly fs");
return -EINVAL;
}
- sbi->sb->s_flags |= SB_ACTIVE;

f2fs_update_time(sbi, DISABLE_TIME);

@@ -1909,13 +1907,13 @@ static int f2fs_disable_checkpoint(struct f2fs_sb_info *sbi)
ret = sync_filesystem(sbi->sb);
if (ret || err) {
err = ret ? ret : err;
- goto restore_flag;
+ goto out;
}

unusable = f2fs_get_unusable_blocks(sbi);
if (f2fs_disable_cp_again(sbi, unusable)) {
err = -EAGAIN;
- goto restore_flag;
+ goto out;
}

down_write(&sbi->gc_lock);
@@ -1931,8 +1929,7 @@ static int f2fs_disable_checkpoint(struct f2fs_sb_info *sbi)

out_unlock:
up_write(&sbi->gc_lock);
-restore_flag:
- sbi->sb->s_flags = s_flags; /* Restore SB_RDONLY status */
+out:
return err;
}

--
2.29.2
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