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

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Message-Id: <1452020286-9508-2-git-send-email-pandit.parav@gmail.com>
Date:	Wed,  6 Jan 2016 00:28:01 +0530
From:	Parav Pandit <pandit.parav@...il.com>
To:	cgroups@...r.kernel.org, linux-doc@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-rdma@...r.kernel.org,
	tj@...nel.org, lizefan@...wei.com, hannes@...xchg.org,
	dledford@...hat.com, liranl@...lanox.com, sean.hefty@...el.com,
	jgunthorpe@...idianresearch.com, haggaie@...lanox.com
Cc:	corbet@....net, james.l.morris@...cle.com, serge@...lyn.com,
	ogerlitz@...lanox.com, matanb@...lanox.com, raindel@...lanox.com,
	akpm@...ux-foundation.org, linux-security-module@...r.kernel.org,
	pandit.parav@...il.com
Subject: [PATCHv1 1/6] rdmacg: Added rdma cgroup header file

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

Signed-off-by: Parav Pandit <pandit.parav@...il.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

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