1 files changed, 13 insertions, 3 deletions

diff --git a/include/linux/f2fs_fs.h b/include/linux/f2fs_fs.h
index 6ff0b0b42d47..08ed2b0a96e6 100644
--- a/include/linux/f2fs_fs.h
+++ b/include/linux/f2fs_fs.h
@@ -24,6 +24,9 @@
 #define NULL_ADDR               ((block_t)0)    /* used as block_t addresses */
 #define NEW_ADDR                ((block_t)-1)   /* used as block_t addresses */
 
+/* 0, 1(node nid), 2(meta nid) are reserved node id */
+#define F2FS_RESERVED_NODE_NUM          3
+
 #define F2FS_ROOT_INO(sbi)      (sbi->root_ino_num)
 #define F2FS_NODE_INO(sbi)      (sbi->node_ino_num)
 #define F2FS_META_INO(sbi)      (sbi->meta_ino_num)
@@ -87,6 +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 */
@@ -123,6 +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 */
@@ -144,6 +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 */
@@ -163,8 +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 */
@@ -194,7 +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;