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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/node.h
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@@ -293,7 +293,7 @@ static inline void fill_node_footer_blkaddr(struct page *page, block_t blkaddr)
size_t crc_offset = le32_to_cpu(ckpt->checksum_offset);
__u64 cp_ver = le64_to_cpu(ckpt->checkpoint_ver);
if (is_set_ckpt_flags(ckpt, CP_CRC_RECOVERY_FLAG)) {
if (__is_set_ckpt_flags(ckpt, CP_CRC_RECOVERY_FLAG)) {
__u64 crc = le32_to_cpu(*((__le32 *)
((unsigned char *)ckpt + crc_offset)));
cp_ver |= (crc << 32);
@@ -308,7 +308,7 @@ static inline bool is_recoverable_dnode(struct page *page)
size_t crc_offset = le32_to_cpu(ckpt->checksum_offset);
__u64 cp_ver = cur_cp_version(ckpt);
if (is_set_ckpt_flags(ckpt, CP_CRC_RECOVERY_FLAG)) {
if (__is_set_ckpt_flags(ckpt, CP_CRC_RECOVERY_FLAG)) {
__u64 crc = le32_to_cpu(*((__le32 *)
((unsigned char *)ckpt + crc_offset)));
cp_ver |= (crc << 32);