RDMA/cma: Add support for netlink statistics export
Add callbacks and data types for statistics export of all current
devices/ids. The schema for RDMA CM is a series of netlink messages.
Each one contains an rdma_cm_stat struct. Additionally, two netlink
attributes are created for the addresses for each message (if
applicable).
Their types used are:
RDMA_NL_RDMA_CM_ATTR_SRC_ADDR (The source address for this ID)
RDMA_NL_RDMA_CM_ATTR_DST_ADDR (The destination address for this ID)
sockaddr_* structs are encapsulated within these attributes.
In other words, every transaction contains a series of messages like:
-------message 1-------
struct rdma_cm_id_stats {
__u32 qp_num;
__u32 bound_dev_if;
__u32 port_space;
__s32 pid;
__u8 cm_state;
__u8 node_type;
__u8 port_num;
__u8 reserved;
}
RDMA_NL_RDMA_CM_ATTR_SRC_ADDR attribute - contains the source address
RDMA_NL_RDMA_CM_ATTR_DST_ADDR attribute - contains the destination address
-------end 1-------
-------message 2-------
struct rdma_cm_id_stats
RDMA_NL_RDMA_CM_ATTR_SRC_ADDR attribute
RDMA_NL_RDMA_CM_ATTR_DST_ADDR attribute
-------end 2-------
Signed-off-by: Nir Muchtar <nirm@voltaire.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
diff --git a/include/rdma/rdma_netlink.h b/include/rdma/rdma_netlink.h
index c983a19..3c5363a 100644
--- a/include/rdma/rdma_netlink.h
+++ b/include/rdma/rdma_netlink.h
@@ -1,10 +1,38 @@
#ifndef _RDMA_NETLINK_H
#define _RDMA_NETLINK_H
+#include <linux/types.h>
+
+enum {
+ RDMA_NL_RDMA_CM = 1
+};
+
#define RDMA_NL_GET_CLIENT(type) ((type & (((1 << 6) - 1) << 10)) >> 10)
#define RDMA_NL_GET_OP(type) (type & ((1 << 10) - 1))
#define RDMA_NL_GET_TYPE(client, op) ((client << 10) + op)
+enum {
+ RDMA_NL_RDMA_CM_ID_STATS = 0,
+ RDMA_NL_RDMA_CM_NUM_OPS
+};
+
+enum {
+ RDMA_NL_RDMA_CM_ATTR_SRC_ADDR = 1,
+ RDMA_NL_RDMA_CM_ATTR_DST_ADDR,
+ RDMA_NL_RDMA_CM_NUM_ATTR,
+};
+
+struct rdma_cm_id_stats {
+ __u32 qp_num;
+ __u32 bound_dev_if;
+ __u32 port_space;
+ __s32 pid;
+ __u8 cm_state;
+ __u8 node_type;
+ __u8 port_num;
+ __u8 qp_type;
+};
+
#ifdef __KERNEL__
#include <linux/netlink.h>