Enhanced partition statistics: sysfs

Reports enhanced partition statistics in sysfs.
Signed-off-by: NJerome Marchand <jmarchan@redhat.com>

fs/partitions/check.c

@@ -216,9 +216,25 @@ static ssize_t part_stat_show(struct device *dev,
 {
 	struct hd_struct *p = dev_to_part(dev);
 
-	return sprintf(buf, "%8u %8llu %8u %8llu\n",
-		       p->ios[0], (unsigned long long)p->sectors[0],
-		       p->ios[1], (unsigned long long)p->sectors[1]);
+	preempt_disable();
+	part_round_stats(p);
+	preempt_enable();
+	return sprintf(buf,
+		"%8lu %8lu %8llu %8u "
+		"%8lu %8lu %8llu %8u "
+		"%8u %8u %8u"
+		"\n",
+		part_stat_read(p, ios[READ]),
+		part_stat_read(p, merges[READ]),
+		(unsigned long long)part_stat_read(p, sectors[READ]),
+		jiffies_to_msecs(part_stat_read(p, ticks[READ])),
+		part_stat_read(p, ios[WRITE]),
+		part_stat_read(p, merges[WRITE]),
+		(unsigned long long)part_stat_read(p, sectors[WRITE]),
+		jiffies_to_msecs(part_stat_read(p, ticks[WRITE])),
+		p->in_flight,
+		jiffies_to_msecs(part_stat_read(p, io_ticks)),
+		jiffies_to_msecs(part_stat_read(p, time_in_queue)));
 }
 
 #ifdef CONFIG_FAIL_MAKE_REQUEST