f2fs: introduce cp_lock to protect updating of ckpt_flags

This patch introduces spinlock to protect updating process of ckpt_flags
field in struct f2fs_checkpoint, it avoids incorrectly updating in race
condition.

Signed-off-by: Chao Yu <yuchao0@huawei.com>
[Jaegeuk Kim: add __is_set_ckpt_flags likewise __set_ckpt_flags]
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Chao Yu
2016-09-20 11:04:18 +08:00
committed by Jaegeuk Kim
parent fadb2fb8af
commit aaec2b1d18
6 changed files with 59 additions and 28 deletions

View File

@@ -627,7 +627,7 @@ out:
clear_sbi_flag(sbi, SBI_POR_DOING);
if (err)
set_ckpt_flags(sbi->ckpt, CP_ERROR_FLAG);
set_ckpt_flags(sbi, CP_ERROR_FLAG);
mutex_unlock(&sbi->cp_mutex);
/* let's drop all the directory inodes for clean checkpoint */