From 0c6f0e7920f39b28bdbe5f134f3e592542332d87 Mon Sep 17 00:00:00 2001
From: "ecashin@coraid.com" <ecashin@coraid.com>
Date: Mon, 18 Apr 2005 22:00:22 -0700
Subject: [PATCH] [PATCH] aoe 11/12: add support for disk statistics
add support for disk statistics
Signed-off-by: Ed L. Cashin <ecashin@coraid.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---
drivers/block/aoe/aoe.h | 1 +
drivers/block/aoe/aoeblk.c | 1 +
drivers/block/aoe/aoecmd.c | 14 ++++++++++++++
3 files changed, 16 insertions(+)
diff --git a/drivers/block/aoe/aoe.h b/drivers/block/aoe/aoe.h
index d3b0e2ca151a..2e92cfb4997c 100644
--- a/drivers/block/aoe/aoe.h
+++ b/drivers/block/aoe/aoe.h
@@ -90,6 +90,7 @@ enum {
struct buf {
struct list_head bufs;
+ ulong start_time; /* for disk stats */
ulong flags;
ulong nframesout;
char *bufaddr;
diff --git a/drivers/block/aoe/aoeblk.c b/drivers/block/aoe/aoeblk.c
index 63561b280bc5..a2735d975846 100644
--- a/drivers/block/aoe/aoeblk.c
+++ b/drivers/block/aoe/aoeblk.c
@@ -125,6 +125,7 @@ aoeblk_make_request(request_queue_t *q, struct bio *bio)
}
memset(buf, 0, sizeof(*buf));
INIT_LIST_HEAD(&buf->bufs);
+ buf->start_time = jiffies;
buf->bio = bio;
buf->resid = bio->bi_size;
buf->sector = bio->bi_sector;
diff --git a/drivers/block/aoe/aoecmd.c b/drivers/block/aoe/aoecmd.c
index f810bd6bf87f..60beb8db4612 100644
--- a/drivers/block/aoe/aoecmd.c
+++ b/drivers/block/aoe/aoecmd.c
@@ -456,6 +456,20 @@ aoecmd_ata_rsp(struct sk_buff *skb)
if (buf) {
buf->nframesout -= 1;
if (buf->nframesout == 0 && buf->resid == 0) {
+ unsigned long duration = jiffies - buf->start_time;
+ unsigned long n_sect = buf->bio->bi_size >> 9;
+ struct gendisk *disk = d->gd;
+
+ if (bio_data_dir(buf->bio) == WRITE) {
+ disk_stat_inc(disk, writes);
+ disk_stat_add(disk, write_ticks, duration);
+ disk_stat_add(disk, write_sectors, n_sect);
+ } else {
+ disk_stat_inc(disk, reads);
+ disk_stat_add(disk, read_ticks, duration);
+ disk_stat_add(disk, read_sectors, n_sect);
+ }
+ disk_stat_add(disk, io_ticks, duration);
n = (buf->flags & BUFFL_FAIL) ? -EIO : 0;
bio_endio(buf->bio, buf->bio->bi_size, n);
mempool_free(buf, d->bufpool);
--
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