f2fs: introduce help function F2FS_NODE()

Introduce help function F2FS_NODE() to simplify the conversion of node_page to
f2fs_node.

Signed-off-by: Gu Zheng <guz.fnst@cn.fujitsu.com>
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>

8 files changed, 35 insertions, 40 deletions

diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index 035f9a345cdf..c73c394c3d8c 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -39,7 +39,7 @@ static void __set_data_blkaddr(struct dnode_of_data *dn, block_t new_addr)
 
         wait_on_page_writeback(node_page);
 
-        rn = (struct f2fs_node *)page_address(node_page);
+        rn = F2FS_NODE(node_page);
 
         /* Get physical address of data block */
         addr_array = blkaddr_in_node(rn);
diff --git a/fs/f2fs/dir.c b/fs/f2fs/dir.c
index 62f0d5977c64..89ecb3785321 100644
--- a/fs/f2fs/dir.c
+++ b/fs/f2fs/dir.c
@@ -270,7 +270,7 @@ static void init_dent_inode(const struct qstr *name, struct page *ipage)
         struct f2fs_node *rn;
 
         /* copy name info. to this inode page */
-        rn = (struct f2fs_node *)page_address(ipage);
+        rn = F2FS_NODE(ipage);
         rn->i.i_namelen = cpu_to_le32(name->len);
         memcpy(rn->i.i_name, name->name, name->len);
         set_page_dirty(ipage);
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index 0a352b658ed8..2dfd584bf79f 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -455,6 +455,11 @@ static inline struct f2fs_checkpoint *F2FS_CKPT(struct f2fs_sb_info *sbi)
         return (struct f2fs_checkpoint *)(sbi->ckpt);
 }
 
+static inline struct f2fs_node *F2FS_NODE(struct page *page)
+{
+        return (struct f2fs_node *)page_address(page);
+}
+
 static inline struct f2fs_nm_info *NM_I(struct f2fs_sb_info *sbi)
 {
         return (struct f2fs_nm_info *)(sbi->nm_info);
@@ -813,7 +818,7 @@ static inline struct kmem_cache *f2fs_kmem_cache_create(const char *name,
 
 static inline bool IS_INODE(struct page *page)
 {
-        struct f2fs_node *p = (struct f2fs_node *)page_address(page);
+        struct f2fs_node *p = F2FS_NODE(page);
         return RAW_IS_INODE(p);
 }
 
@@ -827,7 +832,7 @@ static inline block_t datablock_addr(struct page *node_page,
 {
         struct f2fs_node *raw_node;
         __le32 *addr_array;
-        raw_node = (struct f2fs_node *)page_address(node_page);
+        raw_node = F2FS_NODE(node_page);
         addr_array = blkaddr_in_node(raw_node);
         return le32_to_cpu(addr_array[offset]);
 }
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index 157a6357f14c..65ca3b3e5806 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -206,7 +206,7 @@ int truncate_data_blocks_range(struct dnode_of_data *dn, int count)
         struct f2fs_node *raw_node;
         __le32 *addr;
 
-        raw_node = page_address(dn->node_page);
+        raw_node = F2FS_NODE(dn->node_page);
         addr = blkaddr_in_node(raw_node) + ofs;
 
         for ( ; count > 0; count--, addr++, dn->ofs_in_node++) {
diff --git a/fs/f2fs/inode.c b/fs/f2fs/inode.c
index 2b2d45d19e3e..debf74308045 100644
--- a/fs/f2fs/inode.c
+++ b/fs/f2fs/inode.c
@@ -56,7 +56,7 @@ static int do_read_inode(struct inode *inode)
         if (IS_ERR(node_page))
                 return PTR_ERR(node_page);
 
-        rn = page_address(node_page);
+        rn = F2FS_NODE(node_page);
         ri = &(rn->i);
 
         inode->i_mode = le16_to_cpu(ri->i_mode);
@@ -153,7 +153,7 @@ void update_inode(struct inode *inode, struct page *node_page)
 
         wait_on_page_writeback(node_page);
 
-        rn = page_address(node_page);
+        rn = F2FS_NODE(node_page);
         ri = &(rn->i);
 
         ri->i_mode = cpu_to_le16(inode->i_mode);
diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c
index b418aee09573..f5172e271d46 100644
--- a/fs/f2fs/node.c
+++ b/fs/f2fs/node.c
@@ -565,7 +565,7 @@ static int truncate_nodes(struct dnode_of_data *dn, unsigned int nofs,
                 return PTR_ERR(page);
         }
 
-        rn = (struct f2fs_node *)page_address(page);
+        rn = F2FS_NODE(page);
         if (depth < 3) {
                 for (i = ofs; i < NIDS_PER_BLOCK; i++, freed++) {
                         child_nid = le32_to_cpu(rn->in.nid[i]);
@@ -698,7 +698,7 @@ restart:
         set_new_dnode(&dn, inode, page, NULL, 0);
         unlock_page(page);
 
-        rn = page_address(page);
+        rn = F2FS_NODE(page);
         switch (level) {
         case 0:
         case 1:
@@ -1484,8 +1484,8 @@ int recover_inode_page(struct f2fs_sb_info *sbi, struct page *page)
         SetPageUptodate(ipage);
         fill_node_footer(ipage, ino, ino, 0, true);
 
-        src = (struct f2fs_node *)page_address(page);
-        dst = (struct f2fs_node *)page_address(ipage);
+        src = F2FS_NODE(page);
+        dst = F2FS_NODE(ipage);
 
         memcpy(dst, src, (unsigned long)&src->i.i_ext - (unsigned long)&src->i);
         dst->i.i_size = 0;
@@ -1535,7 +1535,7 @@ int restore_node_summary(struct f2fs_sb_info *sbi,
                         goto out;
 
                 lock_page(page);
-                rn = (struct f2fs_node *)page_address(page);
+                rn = F2FS_NODE(page);
                 sum_entry->nid = rn->footer.nid;
                 sum_entry->version = 0;
                 sum_entry->ofs_in_node = 0;
diff --git a/fs/f2fs/node.h b/fs/f2fs/node.h
index c65fb4f4230f..87349c4ea0ef 100644
--- a/fs/f2fs/node.h
+++ b/fs/f2fs/node.h
@@ -155,8 +155,7 @@ static inline void set_to_next_nat(struct f2fs_nm_info *nm_i, nid_t start_nid)
 static inline void fill_node_footer(struct page *page, nid_t nid,
                                 nid_t ino, unsigned int ofs, bool reset)
 {
-        void *kaddr = page_address(page);
-        struct f2fs_node *rn = (struct f2fs_node *)kaddr;
+        struct f2fs_node *rn = F2FS_NODE(page);
         if (reset)
                 memset(rn, 0, sizeof(*rn));
         rn->footer.nid = cpu_to_le32(nid);
@@ -166,10 +165,8 @@ static inline void fill_node_footer(struct page *page, nid_t nid,
 
 static inline void copy_node_footer(struct page *dst, struct page *src)
 {
-        void *src_addr = page_address(src);
-        void *dst_addr = page_address(dst);
-        struct f2fs_node *src_rn = (struct f2fs_node *)src_addr;
-        struct f2fs_node *dst_rn = (struct f2fs_node *)dst_addr;
+        struct f2fs_node *src_rn = F2FS_NODE(src);
+        struct f2fs_node *dst_rn = F2FS_NODE(dst);
         memcpy(&dst_rn->footer, &src_rn->footer, sizeof(struct node_footer));
 }
 
@@ -177,45 +174,40 @@ static inline void fill_node_footer_blkaddr(struct page *page, block_t blkaddr)
 {
         struct f2fs_sb_info *sbi = F2FS_SB(page->mapping->host->i_sb);
         struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
-        void *kaddr = page_address(page);
-        struct f2fs_node *rn = (struct f2fs_node *)kaddr;
+        struct f2fs_node *rn = F2FS_NODE(page);
+
         rn->footer.cp_ver = ckpt->checkpoint_ver;
         rn->footer.next_blkaddr = cpu_to_le32(blkaddr);
 }
 
 static inline nid_t ino_of_node(struct page *node_page)
 {
-        void *kaddr = page_address(node_page);
-        struct f2fs_node *rn = (struct f2fs_node *)kaddr;
+        struct f2fs_node *rn = F2FS_NODE(node_page);
         return le32_to_cpu(rn->footer.ino);
 }
 
 static inline nid_t nid_of_node(struct page *node_page)
 {
-        void *kaddr = page_address(node_page);
-        struct f2fs_node *rn = (struct f2fs_node *)kaddr;
+        struct f2fs_node *rn = F2FS_NODE(node_page);
         return le32_to_cpu(rn->footer.nid);
 }
 
 static inline unsigned int ofs_of_node(struct page *node_page)
 {
-        void *kaddr = page_address(node_page);
-        struct f2fs_node *rn = (struct f2fs_node *)kaddr;
+        struct f2fs_node *rn = F2FS_NODE(node_page);
         unsigned flag = le32_to_cpu(rn->footer.flag);
         return flag >> OFFSET_BIT_SHIFT;
 }
 
 static inline unsigned long long cpver_of_node(struct page *node_page)
 {
-        void *kaddr = page_address(node_page);
-        struct f2fs_node *rn = (struct f2fs_node *)kaddr;
+        struct f2fs_node *rn = F2FS_NODE(node_page);
         return le64_to_cpu(rn->footer.cp_ver);
 }
 
 static inline block_t next_blkaddr_of_node(struct page *node_page)
 {
-        void *kaddr = page_address(node_page);
-        struct f2fs_node *rn = (struct f2fs_node *)kaddr;
+        struct f2fs_node *rn = F2FS_NODE(node_page);
         return le32_to_cpu(rn->footer.next_blkaddr);
 }
 
@@ -250,7 +242,7 @@ static inline bool IS_DNODE(struct page *node_page)
 
 static inline void set_nid(struct page *p, int off, nid_t nid, bool i)
 {
-        struct f2fs_node *rn = (struct f2fs_node *)page_address(p);
+        struct f2fs_node *rn = F2FS_NODE(p);
 
         wait_on_page_writeback(p);
 
@@ -263,7 +255,8 @@ static inline void set_nid(struct page *p, int off, nid_t nid, bool i)
 
 static inline nid_t get_nid(struct page *p, int off, bool i)
 {
-        struct f2fs_node *rn = (struct f2fs_node *)page_address(p);
+        struct f2fs_node *rn = F2FS_NODE(p);
+
         if (i)
                 return le32_to_cpu(rn->i.i_nid[off - NODE_DIR1_BLOCK]);
         return le32_to_cpu(rn->in.nid[off]);
@@ -314,8 +307,7 @@ static inline void clear_cold_data(struct page *page)
 
 static inline int is_node(struct page *page, int type)
 {
-        void *kaddr = page_address(page);
-        struct f2fs_node *rn = (struct f2fs_node *)kaddr;
+        struct f2fs_node *rn = F2FS_NODE(page);
         return le32_to_cpu(rn->footer.flag) & (1 << type);
 }
 
@@ -325,7 +317,7 @@ static inline int is_node(struct page *page, int type)
 
 static inline void set_cold_node(struct inode *inode, struct page *page)
 {
-        struct f2fs_node *rn = (struct f2fs_node *)page_address(page);
+        struct f2fs_node *rn = F2FS_NODE(page);
         unsigned int flag = le32_to_cpu(rn->footer.flag);
 
         if (S_ISDIR(inode->i_mode))
@@ -337,7 +329,7 @@ static inline void set_cold_node(struct inode *inode, struct page *page)
 
 static inline void set_mark(struct page *page, int mark, int type)
 {
-        struct f2fs_node *rn = (struct f2fs_node *)page_address(page);
+        struct f2fs_node *rn = F2FS_NODE(page);
         unsigned int flag = le32_to_cpu(rn->footer.flag);
         if (mark)
                 flag |= (0x1 << type);
diff --git a/fs/f2fs/recovery.c b/fs/f2fs/recovery.c
index d56d951c2253..639eb3465286 100644
--- a/fs/f2fs/recovery.c
+++ b/fs/f2fs/recovery.c
@@ -40,8 +40,7 @@ static struct fsync_inode_entry *get_fsync_inode(struct list_head *head,
 
 static int recover_dentry(struct page *ipage, struct inode *inode)
 {
-        void *kaddr = page_address(ipage);
-        struct f2fs_node *raw_node = (struct f2fs_node *)kaddr;
+        struct f2fs_node *raw_node = F2FS_NODE(ipage);
         struct f2fs_inode *raw_inode = &(raw_node->i);
         nid_t pino = le32_to_cpu(raw_inode->i_pino);
         struct f2fs_dir_entry *de;
@@ -93,8 +92,7 @@ out:
 
 static int recover_inode(struct inode *inode, struct page *node_page)
 {
-        void *kaddr = page_address(node_page);
-        struct f2fs_node *raw_node = (struct f2fs_node *)kaddr;
+        struct f2fs_node *raw_node = F2FS_NODE(node_page);
         struct f2fs_inode *raw_inode = &(raw_node->i);
 
         if (!IS_INODE(node_page))