f2fs: new helper cur_cp_crc() getting crc in f2fs_checkpoint
There are four places that getting the crc value in f2fs_checkpoint,
just add a new helper cur_cp_crc for them.
Signed-off-by: Kinglong Mee <kinglongmee@gmail.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c
index 04d7c24..0339daf 100644
--- a/fs/f2fs/checkpoint.c
+++ b/fs/f2fs/checkpoint.c
@@ -683,8 +683,7 @@ static int get_checkpoint_version(struct f2fs_sb_info *sbi, block_t cp_addr,
return -EINVAL;
}
- crc = le32_to_cpu(*((__le32 *)((unsigned char *)*cp_block
- + crc_offset)));
+ crc = cur_cp_crc(*cp_block);
if (!f2fs_crc_valid(sbi, crc, *cp_block, crc_offset)) {
f2fs_msg(sbi->sb, KERN_WARNING, "invalid crc value");
return -EINVAL;
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index 633f2ef..4d332b3 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -1126,6 +1126,12 @@ static inline unsigned long long cur_cp_version(struct f2fs_checkpoint *cp)
return le64_to_cpu(cp->checkpoint_ver);
}
+static inline __u64 cur_cp_crc(struct f2fs_checkpoint *cp)
+{
+ size_t crc_offset = le32_to_cpu(cp->checksum_offset);
+ return le32_to_cpu(*((__le32 *)((unsigned char *)cp + crc_offset)));
+}
+
static inline bool __is_set_ckpt_flags(struct f2fs_checkpoint *cp, unsigned int f)
{
unsigned int ckpt_flags = le32_to_cpu(cp->ckpt_flags);
diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c
index 24ea49f..8e53181 100644
--- a/fs/f2fs/node.c
+++ b/fs/f2fs/node.c
@@ -2462,9 +2462,6 @@ static int __get_nat_bitmaps(struct f2fs_sb_info *sbi)
unsigned int nat_bits_bytes = nm_i->nat_blocks / BITS_PER_BYTE;
unsigned int i;
__u64 cp_ver = cur_cp_version(ckpt);
- size_t crc_offset = le32_to_cpu(ckpt->checksum_offset);
- __u64 crc = le32_to_cpu(*((__le32 *)
- ((unsigned char *)ckpt + crc_offset)));
block_t nat_bits_addr;
if (!enabled_nat_bits(sbi, NULL))
@@ -2487,7 +2484,7 @@ static int __get_nat_bitmaps(struct f2fs_sb_info *sbi)
f2fs_put_page(page, 1);
}
- cp_ver |= (crc << 32);
+ cp_ver |= (cur_cp_crc(ckpt) << 32);
if (cpu_to_le64(cp_ver) != *(__le64 *)nm_i->nat_bits) {
disable_nat_bits(sbi, true);
return 0;
diff --git a/fs/f2fs/node.h b/fs/f2fs/node.h
index 3fc9c4b..2f9603f 100644
--- a/fs/f2fs/node.h
+++ b/fs/f2fs/node.h
@@ -300,14 +300,11 @@ static inline void fill_node_footer_blkaddr(struct page *page, block_t blkaddr)
{
struct f2fs_checkpoint *ckpt = F2FS_CKPT(F2FS_P_SB(page));
struct f2fs_node *rn = F2FS_NODE(page);
- size_t crc_offset = le32_to_cpu(ckpt->checksum_offset);
- __u64 cp_ver = le64_to_cpu(ckpt->checkpoint_ver);
+ __u64 cp_ver = cur_cp_version(ckpt);
- 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);
- }
+ if (__is_set_ckpt_flags(ckpt, CP_CRC_RECOVERY_FLAG))
+ cp_ver |= (cur_cp_crc(ckpt) << 32);
+
rn->footer.cp_ver = cpu_to_le64(cp_ver);
rn->footer.next_blkaddr = cpu_to_le32(blkaddr);
}
@@ -315,14 +312,11 @@ static inline void fill_node_footer_blkaddr(struct page *page, block_t blkaddr)
static inline bool is_recoverable_dnode(struct page *page)
{
struct f2fs_checkpoint *ckpt = F2FS_CKPT(F2FS_P_SB(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)) {
- __u64 crc = le32_to_cpu(*((__le32 *)
- ((unsigned char *)ckpt + crc_offset)));
- cp_ver |= (crc << 32);
- }
+ if (__is_set_ckpt_flags(ckpt, CP_CRC_RECOVERY_FLAG))
+ cp_ver |= (cur_cp_crc(ckpt) << 32);
+
return cp_ver == cpver_of_node(page);
}