f2fs: change get_new_data_page to pass a locked node page

This patch is for passing a locked node page to get_dnode_of_data.
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>

fs/f2fs/data.c

@@ -280,8 +280,8 @@ struct page *get_lock_data_page(struct inode *inode, pgoff_t index)
  * Also, caller should grab and release a mutex by calling mutex_lock_op() and
  * mutex_unlock_op().
  */
-struct page *get_new_data_page(struct inode *inode, pgoff_t index,
-						bool new_i_size)
+struct page *get_new_data_page(struct inode *inode,
+		struct page *npage, pgoff_t index, bool new_i_size)
 {
 	struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
 	struct address_space *mapping = inode->i_mapping;
@@ -289,18 +289,20 @@ struct page *get_new_data_page(struct inode *inode, pgoff_t index,
 	struct dnode_of_data dn;
 	int err;
 
-	set_new_dnode(&dn, inode, NULL, NULL, 0);
+	set_new_dnode(&dn, inode, npage, npage, 0);
 	err = get_dnode_of_data(&dn, index, ALLOC_NODE);
 	if (err)
 		return ERR_PTR(err);
 
 	if (dn.data_blkaddr == NULL_ADDR) {
 		if (reserve_new_block(&dn)) {
-			f2fs_put_dnode(&dn);
+			if (!npage)
+				f2fs_put_dnode(&dn);
 			return ERR_PTR(-ENOSPC);
 		}
 	}
-	f2fs_put_dnode(&dn);
+	if (!npage)
+		f2fs_put_dnode(&dn);
 repeat:
 	page = grab_cache_page(mapping, index);
 	if (!page)

fs/f2fs/dir.c

@@ -287,7 +287,7 @@ static int make_empty_dir(struct inode *inode, struct inode *parent)
 	struct f2fs_dir_entry *de;
 	void *kaddr;
 
-	dentry_page = get_new_data_page(inode, 0, true);
+	dentry_page = get_new_data_page(inode, NULL, 0, true);
 	if (IS_ERR(dentry_page))
 		return PTR_ERR(dentry_page);
 
@@ -448,7 +448,7 @@ int __f2fs_add_link(struct inode *dir, const struct qstr *name, struct inode *in
 	bidx = dir_block_index(level, (le32_to_cpu(dentry_hash) % nbucket));
 
 	for (block = bidx; block <= (bidx + nblock - 1); block++) {
-		dentry_page = get_new_data_page(dir, block, true);
+		dentry_page = get_new_data_page(dir, NULL, block, true);
 		if (IS_ERR(dentry_page))
 			return PTR_ERR(dentry_page);
 

fs/f2fs/f2fs.h

@@ -1027,7 +1027,7 @@ int reserve_new_block(struct dnode_of_data *);
 void update_extent_cache(block_t, struct dnode_of_data *);
 struct page *find_data_page(struct inode *, pgoff_t, bool);
 struct page *get_lock_data_page(struct inode *, pgoff_t);
-struct page *get_new_data_page(struct inode *, pgoff_t, bool);
+struct page *get_new_data_page(struct inode *, struct page *, pgoff_t, bool);
 int f2fs_readpage(struct f2fs_sb_info *, struct page *, block_t, int);
 int do_write_data_page(struct page *);
 

fs/f2fs/file.c

@@ -387,7 +387,7 @@ static void fill_zero(struct inode *inode, pgoff_t index,
 	f2fs_balance_fs(sbi);
 
 	ilock = mutex_lock_op(sbi);
-	page = get_new_data_page(inode, index, false);
+	page = get_new_data_page(inode, NULL, index, false);
 	mutex_unlock_op(sbi, ilock);
 
 	if (!IS_ERR(page)) {