[PATCH 6/7] blkio-cgroup: Add a cgroup support to dm-ioband

[Ryo Tsuruta]

With this patch, dm-ioband can work with the blkio-cgroup.

Based on 2.6.30-rc3-git3
Signed-off-by: Hirokazu Takahashi <taka at valinux.co.jp>
Signed-off-by: Ryo Tsuruta <ryov at valinux.co.jp>

---
 drivers/md/dm-ioband-type.c |   10 ++--------
 1 file changed, 2 insertions(+), 8 deletions(-)

Index: linux-2.6.30-rc3-git3/drivers/md/dm-ioband-type.c
===================================================================
--- linux-2.6.30-rc3-git3.orig/drivers/md/dm-ioband-type.c
+++ linux-2.6.30-rc3-git3/drivers/md/dm-ioband-type.c
@@ -6,6 +6,7 @@
  * This file is released under the GPL.
  */
 #include <linux/bio.h>
+#include <linux/biotrack.h>
 #include "dm.h"
 #include "dm-ioband.h"
 
@@ -52,14 +53,7 @@ static int ioband_node(struct bio *bio)
 
 static int ioband_cgroup(struct bio *bio)
 {
-	/*
-	 * This function should return the ID of the cgroup which
-	 * issued "bio". The ID of the cgroup which the current
-	 * process belongs to won't be suitable ID for this purpose,
-	 * since some BIOs will be handled by kernel threads like aio
-	 * or pdflush on behalf of the process requesting the BIOs.
-	 */
-	return 0;	/* not implemented yet */
+	return get_blkio_cgroup_id(bio);
 }
 
 struct group_type dm_ioband_group_type[] = {