[PATCH rdma-next V2 19/27] RDMA/netlink: Expose device and port capability masks

[Leon Romanovsky]

From: Leon Romanovsky <leo...@mellanox.com>

The port capability mask is exposed to user space via sysfs interface,
while device capabilities are available for verbs only.

This patch provides those capabilities through netlink interface.

Signed-off-by: Leon Romanovsky <leo...@mellanox.com>
Reviewed-by: Steve Wise <sw...@opengridcomputing.com>
---
 drivers/infiniband/core/nldev.c  | 19 +++++++++++++++++++
 include/uapi/rdma/rdma_netlink.h |  5 +++++
 2 files changed, 24 insertions(+)

diff --git a/drivers/infiniband/core/nldev.c b/drivers/infiniband/core/nldev.c
index 533ac72a05b8..21e75928400c 100644
--- a/drivers/infiniband/core/nldev.c
+++ b/drivers/infiniband/core/nldev.c
@@ -50,18 +50,37 @@ static int fill_dev_info(struct sk_buff *msg, struct 
ib_device *device)
                return -EMSGSIZE;
        if (nla_put_u32(msg, RDMA_NLDEV_ATTR_PORT_INDEX, rdma_end_port(device)))
                return -EMSGSIZE;
+
+       BUILD_BUG_ON(sizeof(device->attrs.device_cap_flags) != sizeof(u64));
+       if (nla_put_u64_64bit(msg, RDMA_NLDEV_ATTR_CAP_FLAGS,
+                             device->attrs.device_cap_flags, 0))
+               return -EMSGSIZE;
+
        return 0;
 }
 
 static int fill_port_info(struct sk_buff *msg,
                          struct ib_device *device, u32 port)
 {
+       struct ib_port_attr attr;
+       int ret;
+
        if (nla_put_u32(msg, RDMA_NLDEV_ATTR_DEV_INDEX, device->index))
                return -EMSGSIZE;
        if (nla_put_string(msg, RDMA_NLDEV_ATTR_DEV_NAME, device->name))
                return -EMSGSIZE;
        if (nla_put_u32(msg, RDMA_NLDEV_ATTR_PORT_INDEX, port))
                return -EMSGSIZE;
+
+       ret = ib_query_port(device, port, &attr);
+       if (ret)
+               return ret;
+
+       BUILD_BUG_ON(sizeof(attr.port_cap_flags) > sizeof(u64));
+       if (nla_put_u64_64bit(msg, RDMA_NLDEV_ATTR_CAP_FLAGS,
+                             (u64)attr.port_cap_flags, 0))
+               return -EMSGSIZE;
+
        return 0;
 }
 
diff --git a/include/uapi/rdma/rdma_netlink.h b/include/uapi/rdma/rdma_netlink.h
index 1d064fedfa9a..8fc5278d07d6 100644
--- a/include/uapi/rdma/rdma_netlink.h
+++ b/include/uapi/rdma/rdma_netlink.h
@@ -257,6 +257,11 @@ enum rdma_nldev_attr {
         */
        RDMA_NLDEV_ATTR_PORT_INDEX,             /* u32 */
 
+       /*
+        * Device and port capabilities
+        */
+       RDMA_NLDEV_ATTR_CAP_FLAGS,              /* u64 */
+
        RDMA_NLDEV_ATTR_MAX
 };
 #endif /* _UAPI_RDMA_NETLINK_H */
-- 
2.13.2