[PATCHv1 1/6] rdmacg: Added rdma cgroup header file

[Parav Pandit <pandit.parav@gmail.com>]

Added rdma cgroup header file which defines its APIs to perform
charing/uncharing functionality.

Signed-off-by: Parav Pandit <pandit.parav@gmail.com>
---
 include/linux/cgroup_rdma.h | 91 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 91 insertions(+)
 create mode 100644 include/linux/cgroup_rdma.h

diff --git a/include/linux/cgroup_rdma.h b/include/linux/cgroup_rdma.h
new file mode 100644
index 0000000..01d220f
--- /dev/null
+++ b/include/linux/cgroup_rdma.h
@@ -0,0 +1,91 @@
+#ifndef _CGROUP_RDMA_H
+#define _CGROUP_RDMA_H
+
+/*
+ * This file is subject to the terms and conditions of version 2 of the GNU
+ * General Public License.  See the file COPYING in the main directory of the
+ * Linux distribution for more details.
+ */
+
+enum rdmacg_resource_pool_type {
+	RDMACG_RESOURCE_POOL_VERB,
+	RDMACG_RESOURCE_POOL_HW,
+	RDMACG_RESOURCE_POOL_TYPE_MAX,
+};
+
+struct ib_device;
+struct pid;
+struct match_token;
+
+#ifdef CONFIG_CGROUP_RDMA
+#define RDMACG_MAX_RESOURCE_INDEX (64)
+
+struct rdmacg_pool_info {
+	struct match_token *resource_table;
+	int resource_count;
+};
+
+struct rdmacg_resource_pool_ops {
+	struct rdmacg_pool_info*
+		(*get_resource_pool_tokens)(struct ib_device *);
+};
+
+/* APIs for RDMA/IB subsystem to publish when a device wants to
+ * participate in resource accounting
+ */
+void rdmacg_register_ib_device(struct ib_device *device);
+void rdmacg_unregister_ib_device(struct ib_device *device);
+
+/* APIs for RDMA/IB subsystem to charge/uncharge pool specific resources */
+int rdmacg_try_charge_resource(struct ib_device *device,
+			       struct pid *pid,
+			       enum rdmacg_resource_pool_type type,
+			       int resource_index,
+			       int num);
+void rdmacg_uncharge_resource(struct ib_device *device,
+			      struct pid *pid,
+			      enum rdmacg_resource_pool_type type,
+			      int resource_index,
+			      int num);
+
+void rdmacg_set_rpool_ops(struct ib_device *device,
+			  enum rdmacg_resource_pool_type pool_type,
+			  struct rdmacg_resource_pool_ops *ops);
+void rdmacg_clear_rpool_ops(struct ib_device *device,
+			    enum rdmacg_resource_pool_type pool_type);
+int rdmacg_query_resource_limit(struct ib_device *device,
+				struct pid *pid,
+				enum rdmacg_resource_pool_type type,
+				int *limits, int max_count);
+#else
+/* APIs for RDMA/IB subsystem to charge/uncharge device specific resources */
+static inline
+int rdmacg_try_charge_resource(struct ib_device *device,
+			       struct pid *pid,
+			       enum rdmacg_resource_pool_type type,
+			       int resource_index,
+			       int num)
+{ return 0; }
+
+static inline void rdmacg_uncharge_resource(struct ib_device *device,
+					    struct pid *pid,
+					    enum rdmacg_resource_pool_type type,
+					    int resource_index,
+					    int num)
+{ }
+
+static inline
+int rdmacg_query_resource_limit(struct ib_device *device,
+				struct pid *pid,
+				enum rdmacg_resource_pool_type type,
+				int *limits, int max_count)
+{
+	int i;
+
+	for (i = 0; i < max_count; i++)
+		limits[i] = S32_MAX;
+
+	return 0;
+}
+#endif	/* CONFIG_CGROUP_RDMA */
+#endif	/* _CGROUP_RDMA_H */
-- 
1.8.3.1