X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=block%2Fblk-cgroup.h;h=4d316df863b47bf16d2b277998e6c9a3592959d3;hb=8b296c8f9f660b70e958e6e6b9b4293e6ae854f2;hp=b24ab71db8268cca32cf0623d6a191732c065776;hpb=220841906fccafaf4094e87bdb6d252e20cf8c7c;p=safe%2Fjmp%2Flinux-2.6

diff --git a/block/blk-cgroup.h b/block/blk-cgroup.h
index b24ab71..4d316df 100644
--- a/block/blk-cgroup.h
+++ b/block/blk-cgroup.h
@@ -15,6 +15,8 @@
 
 #include <linux/cgroup.h>
 
+#ifdef CONFIG_BLK_CGROUP
+
 struct blkio_cgroup {
 	struct cgroup_subsys_state css;
 	unsigned int weight;
@@ -41,6 +43,40 @@ struct blkio_group {
 	unsigned long sectors;
 };
 
+extern bool blkiocg_css_tryget(struct blkio_cgroup *blkcg);
+extern void blkiocg_css_put(struct blkio_cgroup *blkcg);
+
+typedef void (blkio_unlink_group_fn) (void *key, struct blkio_group *blkg);
+typedef void (blkio_update_group_weight_fn) (struct blkio_group *blkg,
+						unsigned int weight);
+
+struct blkio_policy_ops {
+	blkio_unlink_group_fn *blkio_unlink_group_fn;
+	blkio_update_group_weight_fn *blkio_update_group_weight_fn;
+};
+
+struct blkio_policy_type {
+	struct list_head list;
+	struct blkio_policy_ops ops;
+};
+
+/* Blkio controller policy registration */
+extern void blkio_policy_register(struct blkio_policy_type *);
+extern void blkio_policy_unregister(struct blkio_policy_type *);
+
+#else
+
+struct blkio_group {
+};
+
+struct blkio_policy_type {
+};
+
+static inline void blkio_policy_register(struct blkio_policy_type *blkiop) { }
+static inline void blkio_policy_unregister(struct blkio_policy_type *blkiop) { }
+
+#endif
+
 #define BLKIO_WEIGHT_MIN	100
 #define BLKIO_WEIGHT_MAX	1000
 #define BLKIO_WEIGHT_DEFAULT	500
@@ -69,6 +105,7 @@ extern struct blkio_group *blkiocg_lookup_group(struct blkio_cgroup *blkcg,
 void blkiocg_update_blkio_group_stats(struct blkio_group *blkg,
 			unsigned long time, unsigned long sectors);
 #else
+struct cgroup;
 static inline struct blkio_cgroup *
 cgroup_to_blkio_cgroup(struct cgroup *cgroup) { return NULL; }