f2fs: stat dirty regular/symlink inodes

index a037bbd..53044ea 100644
@@ -733,13 +733,11 @@ static void __add_dirty_inode(struct inode *inode, enum inode_type type)
 
 	set_inode_flag(fi, flag);
 	list_add_tail(&fi->dirty_list, &sbi->inode_list[type]);
-	if (type == DIR_INODE)
-		stat_inc_dirty_dir(sbi);
+	stat_inc_dirty_inode(sbi, type);
 }
 
 static void __remove_dirty_inode(struct inode *inode, enum inode_type type)
 {
-	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
 	struct f2fs_inode_info *fi = F2FS_I(inode);
 	int flag = (type == DIR_INODE) ? FI_DIRTY_DIR : FI_DIRTY_FILE;
 

@@ -749,8 +747,7 @@ static void __remove_dirty_inode(struct inode *inode, enum inode_type type)
 
 	list_del_init(&fi->dirty_list);
 	clear_inode_flag(fi, flag);
-	if (type == DIR_INODE)
-		stat_dec_dirty_dir(sbi);
+	stat_dec_dirty_inode(F2FS_I_SB(inode), type);
 }
 
 void update_dirty_page(struct inode *inode, struct page *page)

index f4a7b9e..bb307e6 100644
@@ -42,8 +42,10 @@ static void update_general_status(struct f2fs_sb_info *sbi)
 	si->ext_node = atomic_read(&sbi->total_ext_node);
 	si->ndirty_node = get_pages(sbi, F2FS_DIRTY_NODES);
 	si->ndirty_dent = get_pages(sbi, F2FS_DIRTY_DENTS);
-	si->ndirty_dirs = sbi->n_dirty_dirs;
 	si->ndirty_meta = get_pages(sbi, F2FS_DIRTY_META);
+	si->ndirty_data = get_pages(sbi, F2FS_DIRTY_DATA);
+	si->ndirty_dirs = sbi->ndirty_inode[DIR_INODE];
+	si->ndirty_files = sbi->ndirty_inode[FILE_INODE];
 	si->inmem_pages = get_pages(sbi, F2FS_INMEM_PAGES);
 	si->wb_pages = get_pages(sbi, F2FS_WRITEBACK);
 	si->total_count = (int)sbi->user_block_count / sbi->blocks_per_seg;

@@ -298,6 +300,8 @@ static int stat_show(struct seq_file *s, void *v)
 			   si->ndirty_node, si->node_pages);
 		seq_printf(s, "  - dents: %4d in dirs:%4d\n",
 			   si->ndirty_dent, si->ndirty_dirs);
+		seq_printf(s, "  - datas: %4d in files:%4d\n",
+			   si->ndirty_data, si->ndirty_files);
 		seq_printf(s, "  - meta: %4d in %4d\n",
 			   si->ndirty_meta, si->meta_pages);
 		seq_printf(s, "  - NATs: %9d/%9d\n  - SITs: %9d/%9d\n",

index b1fb8f7..19beabe 100644
@@ -818,7 +818,7 @@ struct f2fs_sb_info {
 	atomic_t inline_inode;			/* # of inline_data inodes */
 	atomic_t inline_dir;			/* # of inline_dentry inodes */
 	int bg_gc;				/* background gc calls */
-	unsigned int n_dirty_dirs;		/* # of dir inodes */
+	unsigned int ndirty_inode[NR_INODE_TYPE];	/* # of dirty inodes */
 #endif
 	unsigned int last_victim[2];		/* last victim segment # */
 	spinlock_t stat_lock;			/* lock for stat operations */

@@ -1888,7 +1888,8 @@ struct f2fs_stat_info {
 	unsigned long long hit_largest, hit_cached, hit_rbtree;
 	unsigned long long hit_total, total_ext;
 	int ext_tree, ext_node;
-	int ndirty_node, ndirty_dent, ndirty_dirs, ndirty_meta;
+	int ndirty_node, ndirty_meta;
+	int ndirty_dent, ndirty_dirs, ndirty_data, ndirty_files;
 	int nats, dirty_nats, sits, dirty_sits, fnids;
 	int total_count, utilization;
 	int bg_gc, inmem_pages, wb_pages;

@@ -1921,8 +1922,8 @@ static inline struct f2fs_stat_info *F2FS_STAT(struct f2fs_sb_info *sbi)
 #define stat_inc_cp_count(si)		((si)->cp_count++)
 #define stat_inc_call_count(si)		((si)->call_count++)
 #define stat_inc_bggc_count(sbi)	((sbi)->bg_gc++)
-#define stat_inc_dirty_dir(sbi)		((sbi)->n_dirty_dirs++)
-#define stat_dec_dirty_dir(sbi)		((sbi)->n_dirty_dirs--)
+#define stat_inc_dirty_inode(sbi, type)	((sbi)->ndirty_inode[type]++)
+#define stat_dec_dirty_inode(sbi, type)	((sbi)->ndirty_inode[type]--)
 #define stat_inc_total_hit(sbi)		(atomic64_inc(&(sbi)->total_hit_ext))
 #define stat_inc_rbtree_node_hit(sbi)	(atomic64_inc(&(sbi)->read_hit_rbtree))
 #define stat_inc_largest_node_hit(sbi)	(atomic64_inc(&(sbi)->read_hit_largest))

@@ -2003,8 +2004,8 @@ void f2fs_destroy_root_stats(void);
 #define stat_inc_cp_count(si)
 #define stat_inc_call_count(si)
 #define stat_inc_bggc_count(si)
-#define stat_inc_dirty_dir(sbi)
-#define stat_dec_dirty_dir(sbi)
+#define stat_inc_dirty_inode(sbi, type)
+#define stat_dec_dirty_inode(sbi, type)
 #define stat_inc_total_hit(sb)
 #define stat_inc_rbtree_node_hit(sb)
 #define stat_inc_largest_node_hit(sbi)