patch-2.4.19 linux-2.4.19/include/linux/genhd.h

• Lines: 51
• Date: Fri Aug 2 17:39:45 2002
• Orig file: linux-2.4.18/include/linux/genhd.h
• Orig date: Mon Feb 25 11:38:13 2002

diff -urN linux-2.4.18/include/linux/genhd.h linux-2.4.19/include/linux/genhd.h
@@ -63,6 +63,22 @@
 	unsigned long nr_sects;
 	devfs_handle_t de;              /* primary (master) devfs entry  */
 	int number;                     /* stupid old code wastes space  */
+
+	/* Performance stats: */
+	unsigned int ios_in_flight;
+	unsigned int io_ticks;
+	unsigned int last_idle_time;
+	unsigned int last_queue_change;
+	unsigned int aveq;
+	
+	unsigned int rd_ios;
+	unsigned int rd_merges;
+	unsigned int rd_ticks;
+	unsigned int rd_sectors;
+	unsigned int wr_ios;
+	unsigned int wr_merges;
+	unsigned int wr_ticks;
+	unsigned int wr_sectors;	
 };
 
 #define GENHD_FL_REMOVABLE  1
@@ -92,6 +108,7 @@
 extern void add_gendisk(struct gendisk *gp);
 extern void del_gendisk(struct gendisk *gp);
 extern struct gendisk *get_gendisk(kdev_t dev);
+extern int walk_gendisk(int (*walk)(struct gendisk *, void *), void *);
 
 #endif  /*  __KERNEL__  */
 
@@ -242,6 +259,19 @@
 
 char *disk_name (struct gendisk *hd, int minor, char *buf);
 
+/*
+ * disk_round_stats is used to round off the IO statistics for a disk
+ * for a complete clock tick.
+ */
+void disk_round_stats(struct hd_struct *hd);
+
+/* 
+ * Account for the completion of an IO request (used by drivers which 
+ * bypass the normal end_request processing) 
+ */
+struct request;
+void req_finished_io(struct request *);
+
 extern void devfs_register_partitions (struct gendisk *dev, int minor,
 				       int unregister);