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f2fs: introduce cp_lock to protect updating of ckpt_flags

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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
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4
fs/f2fs/segment.c
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@@ -1801,7 +1801,7 @@ static int restore_curseg_summaries(struct f2fs_sb_info *sbi)
int type = CURSEG_HOT_DATA;
int err;
if (is_set_ckpt_flags(F2FS_CKPT(sbi), CP_COMPACT_SUM_FLAG)) {
if (is_set_ckpt_flags(sbi, CP_COMPACT_SUM_FLAG)) {
int npages = npages_for_summary_flush(sbi, true);
if (npages >= 2)
@@ -1898,7 +1898,7 @@ static void write_normal_summaries(struct f2fs_sb_info *sbi,
void write_data_summaries(struct f2fs_sb_info *sbi, block_t start_blk)
{
if (is_set_ckpt_flags(F2FS_CKPT(sbi), CP_COMPACT_SUM_FLAG))
if (is_set_ckpt_flags(sbi, CP_COMPACT_SUM_FLAG))
write_compacted_summaries(sbi, start_blk);
else
write_normal_summaries(sbi, start_blk, CURSEG_HOT_DATA);