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f2fs: use macro for code readability

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This patch introduces DEF_NIDS_PER_INODE/GET_ORPHAN_BLOCKS/F2FS_CP_PACKS macro
instead of numbers in code for readability.

change log from v1:
 o fix typo pointed out by Jaegeuk Kim.

Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Chao Yu
2014-08-22 16:17:38 +08:00
committed by Jaegeuk Kim
parent 9d1589ef2e
commit b5b822050c
2 changed files with 20 additions and 14 deletions
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13
include/linux/f2fs_fs.h
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@@ -90,6 +90,8 @@ struct f2fs_super_block {
#define CP_ORPHAN_PRESENT_FLAG 0x00000002
#define CP_UMOUNT_FLAG 0x00000001
#define F2FS_CP_PACKS 2 /* # of checkpoint packs */
struct f2fs_checkpoint {
__le64 checkpoint_ver; /* checkpoint block version number */
__le64 user_block_count; /* # of user blocks */
@@ -126,6 +128,9 @@ struct f2fs_checkpoint {
*/
#define F2FS_ORPHANS_PER_BLOCK 1020
#define GET_ORPHAN_BLOCKS(n) ((n + F2FS_ORPHANS_PER_BLOCK - 1) / \
F2FS_ORPHANS_PER_BLOCK)
struct f2fs_orphan_block {
__le32 ino[F2FS_ORPHANS_PER_BLOCK]; /* inode numbers */
__le32 reserved; /* reserved */
@@ -147,6 +152,7 @@ struct f2fs_extent {
#define F2FS_NAME_LEN 255
#define F2FS_INLINE_XATTR_ADDRS 50 /* 200 bytes for inline xattrs */
#define DEF_ADDRS_PER_INODE 923 /* Address Pointers in an Inode */
#define DEF_NIDS_PER_INODE 5 /* Node IDs in an Inode */
#define ADDRS_PER_INODE(fi) addrs_per_inode(fi)
#define ADDRS_PER_BLOCK 1018 /* Address Pointers in a Direct Block */
#define NIDS_PER_BLOCK 1018 /* Node IDs in an Indirect Block */
@@ -166,8 +172,9 @@ struct f2fs_extent {
#define MAX_INLINE_DATA (sizeof(__le32) * (DEF_ADDRS_PER_INODE - \
F2FS_INLINE_XATTR_ADDRS - 1))
#define INLINE_DATA_OFFSET (PAGE_CACHE_SIZE - sizeof(struct node_footer) \
- sizeof(__le32) * (DEF_ADDRS_PER_INODE + 5 - 1))
#define INLINE_DATA_OFFSET (PAGE_CACHE_SIZE - sizeof(struct node_footer) -\
sizeof(__le32) * (DEF_ADDRS_PER_INODE + \
DEF_NIDS_PER_INODE - 1))
struct f2fs_inode {
__le16 i_mode; /* file mode */
@@ -197,7 +204,7 @@ struct f2fs_inode {
__le32 i_addr[DEF_ADDRS_PER_INODE]; /* Pointers to data blocks */
__le32 i_nid[5]; /* direct(2), indirect(2),
__le32 i_nid[DEF_NIDS_PER_INODE]; /* direct(2), indirect(2),
double_indirect(1) node id */
} __packed;