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f2fs: clean up hash codes 

f2fs_chksum and f2fs_crc32 use the same 'crc32' crypto engine, also
their implementation are almost the same, except with different
shash description context.

Introduce __f2fs_crc32 to wrap the common codes, and reuse it in
f2fs_chksum and f2fs_crc32.

Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Chao Yu 2017-11-30 19:28:21 +08:00 committed by Jaegeuk Kim
parent bae01eda8e
commit 416d2dbb4e
1 changed files with 19 additions and 27 deletions
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46
fs/f2fs/f2fs.h
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@ -1255,33 +1255,7 @@ static inline bool is_idle(struct f2fs_sb_info *sbi)
/*
* Inline functions
*/
static inline u32 f2fs_crc32(struct f2fs_sb_info *sbi, const void *address,
unsigned int length)
{
SHASH_DESC_ON_STACK(shash, sbi->s_chksum_driver);
u32 *ctx = (u32 *)shash_desc_ctx(shash);
u32 retval;
int err;
shash->tfm = sbi->s_chksum_driver;
shash->flags = 0;
*ctx = F2FS_SUPER_MAGIC;
err = crypto_shash_update(shash, address, length);
BUG_ON(err);
retval = *ctx;
barrier_data(ctx);
return retval;
}
static inline bool f2fs_crc_valid(struct f2fs_sb_info *sbi, __u32 blk_crc,
void *buf, size_t buf_size)
{
return f2fs_crc32(sbi, buf, buf_size) == blk_crc;
}
static inline u32 f2fs_chksum(struct f2fs_sb_info *sbi, u32 crc,
static inline u32 __f2fs_crc32(struct f2fs_sb_info *sbi, u32 crc,
const void *address, unsigned int length)
{
struct {
@ -1302,6 +1276,24 @@ static inline u32 f2fs_chksum(struct f2fs_sb_info *sbi, u32 crc,
return *(u32 *)desc.ctx;
}
static inline u32 f2fs_crc32(struct f2fs_sb_info *sbi, const void *address,
unsigned int length)
{
return __f2fs_crc32(sbi, F2FS_SUPER_MAGIC, address, length);
}
static inline bool f2fs_crc_valid(struct f2fs_sb_info *sbi, __u32 blk_crc,
void *buf, size_t buf_size)
{
return f2fs_crc32(sbi, buf, buf_size) == blk_crc;
}
static inline u32 f2fs_chksum(struct f2fs_sb_info *sbi, u32 crc,
const void *address, unsigned int length)
{
return __f2fs_crc32(sbi, crc, address, length);
}
static inline struct f2fs_inode_info *F2FS_I(struct inode *inode)
{
return container_of(inode, struct f2fs_inode_info, vfs_inode);