[rdma-next v2 29/33] RDMA/netlink: Advertise IB subnet prefix

Leon Romanovsky
2017-08-10T11:08:23Z

Add IB subnet prefix to the port properties exported
by RDMA netlink.

Signed-off-by: Leon Romanovsky <leonro-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>
---
drivers/infiniband/core/nldev.c | 5 +++++
include/uapi/rdma/rdma_netlink.h | 5 +++++
2 files changed, 10 insertions(+)

diff --git a/drivers/infiniband/core/nldev.c b/drivers/infiniband/core/nldev.c
index f932c2c3fad0..7af71d5e52c8 100644
--- a/drivers/infiniband/core/nldev.c
+++ b/drivers/infiniband/core/nldev.c
@@ -44,6 +44,7 @@ static const struct nla_policy nldev_policy[RDMA_NLDEV_ATTR_MAX] = {
.len = IB_FW_VERSION_NAME_MAX - 1},
[RDMA_NLDEV_ATTR_NODE_GUID] = { .type = NLA_U64 },
[RDMA_NLDEV_ATTR_SYS_IMAGE_GUID] = { .type = NLA_U64 },
+ [RDMA_NLDEV_ATTR_SUBNET_PREFIX] = { .type = NLA_U64 },
};

static int fill_dev_info(struct sk_buff *msg, struct ib_device *device)
@@ -97,6 +98,10 @@ static int fill_port_info(struct sk_buff *msg,
if (nla_put_u64_64bit(msg, RDMA_NLDEV_ATTR_CAP_FLAGS,
(u64)attr.port_cap_flags, 0))
return -EMSGSIZE;
+ if (rdma_protocol_ib(device, port) &&
+ nla_put_u64_64bit(msg, RDMA_NLDEV_ATTR_SUBNET_PREFIX,
+ attr.subnet_prefix, 0))
+ return -EMSGSIZE;

return 0;
}
diff --git a/include/uapi/rdma/rdma_netlink.h b/include/uapi/rdma/rdma_netlink.h
index fe3a7429e7a1..481003182a35 100644
--- a/include/uapi/rdma/rdma_netlink.h
+++ b/include/uapi/rdma/rdma_netlink.h
@@ -279,6 +279,11 @@ enum rdma_nldev_attr {
*/
RDMA_NLDEV_ATTR_SYS_IMAGE_GUID, /* u64 */

+ /*
+ * Subnet prefix (in host byte order)
+ */
+ RDMA_NLDEV_ATTR_SUBNET_PREFIX, /* u64 */
+
RDMA_NLDEV_ATTR_MAX
};
#endif /* _UAPI_RDMA_NETLINK_H */