From: Leon Romanovsky <leonro@mellanox.com>
Date: Tue, 3 Apr 2018 04:29:14 +0000 (+0300)
Subject: rdma: Print net device name and index for RDMA device
X-Git-Tag: v5.0.0~223
X-Git-Url: https://git.proxmox.com/?a=commitdiff_plain;h=152594273608612604fe773a762bce2327427e32;p=mirror_iproute2.git

rdma: Print net device name and index for RDMA device

The RDMA devices are operated in RoCE and iWARP modes have net device
underneath. Present their names in regular output and their net index
in detailed mode.

[root@nps ~]# rdma link show mlx5_3/1
4/1: mlx5_3/1: state ACTIVE physical_state LINK_UP netdev ens7
[root@nps ~]# rdma link show mlx5_3/1 -d
4/1: mlx5_3/1: state ACTIVE physical_state LINK_UP netdev ens7 netdev_index 7
    caps: <CM, IP_BASED_GIDS>

Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Reviewed-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: David Ahern <dsahern@gmail.com>
---

diff --git a/rdma/include/uapi/rdma/rdma_netlink.h b/rdma/include/uapi/rdma/rdma_netlink.h
index 9446a721..45474f13 100644
--- a/rdma/include/uapi/rdma/rdma_netlink.h
+++ b/rdma/include/uapi/rdma/rdma_netlink.h
@@ -388,6 +388,10 @@ enum rdma_nldev_attr {
 	RDMA_NLDEV_ATTR_RES_LOCAL_DMA_LKEY,	/* u32 */
 	RDMA_NLDEV_ATTR_RES_UNSAFE_GLOBAL_RKEY,	/* u32 */
 
+	/* Netdev information for relevant protocols, like RoCE and iWARP */
+	RDMA_NLDEV_ATTR_NDEV_INDEX,		/* u32 */
+	RDMA_NLDEV_ATTR_NDEV_NAME,		/* string */
+
 	RDMA_NLDEV_ATTR_MAX
 };
 #endif /* _RDMA_NETLINK_H */
diff --git a/rdma/link.c b/rdma/link.c
index 66bcd50e..7e914c87 100644
--- a/rdma/link.c
+++ b/rdma/link.c
@@ -205,6 +205,26 @@ static void link_print_phys_state(struct rd *rd, struct nlattr **tb)
 		pr_out("physical_state %s ", phys_state_to_str(phys_state));
 }
 
+static void link_print_netdev(struct rd *rd, struct nlattr **tb)
+{
+	const char *netdev_name;
+	uint32_t idx;
+
+	if (!tb[RDMA_NLDEV_ATTR_NDEV_NAME] || !tb[RDMA_NLDEV_ATTR_NDEV_INDEX])
+		return;
+
+	netdev_name = mnl_attr_get_str(tb[RDMA_NLDEV_ATTR_NDEV_NAME]);
+	idx = mnl_attr_get_u32(tb[RDMA_NLDEV_ATTR_NDEV_INDEX]);
+	if (rd->json_output) {
+		jsonw_string_field(rd->jw, "netdev", netdev_name);
+		jsonw_uint_field(rd->jw, "netdev_index", idx);
+	} else {
+		pr_out("netdev %s ", netdev_name);
+		if (rd->show_details)
+			pr_out("netdev_index %u ", idx);
+	}
+}
+
 static int link_parse_cb(const struct nlmsghdr *nlh, void *data)
 {
 	struct nlattr *tb[RDMA_NLDEV_ATTR_MAX] = {};
@@ -241,6 +261,7 @@ static int link_parse_cb(const struct nlmsghdr *nlh, void *data)
 	link_print_lmc(rd, tb);
 	link_print_state(rd, tb);
 	link_print_phys_state(rd, tb);
+	link_print_netdev(rd, tb);
 	if (rd->show_details)
 		link_print_caps(rd, tb);
 
diff --git a/rdma/utils.c b/rdma/utils.c
index 5c1e736a..49c967f3 100644
--- a/rdma/utils.c
+++ b/rdma/utils.c
@@ -391,6 +391,8 @@ static const enum mnl_attr_data_type nldev_policy[RDMA_NLDEV_ATTR_MAX] = {
 	[RDMA_NLDEV_ATTR_RES_LKEY] = MNL_TYPE_U32,
 	[RDMA_NLDEV_ATTR_RES_IOVA] = MNL_TYPE_U64,
 	[RDMA_NLDEV_ATTR_RES_MRLEN] = MNL_TYPE_U64,
+	[RDMA_NLDEV_ATTR_NDEV_INDEX]		= MNL_TYPE_U32,
+	[RDMA_NLDEV_ATTR_NDEV_NAME]		= MNL_TYPE_NUL_STRING,
 };
 
 int rd_attr_cb(const struct nlattr *attr, void *data)