[PATCH] rdma-core/libibverbs: display gid type in ibv_devinfo

[Devesh Sharma <devesh.sharma@broadcom.com>]

It becomes difficult to make out from the output of ibv_devinfo
if a particular gid index is RoCE v2 or not.

Adding a string to the output of ibv_devinfo -v to display the
gid type at the end of gid.

Signed-off-by: Devesh Sharma <devesh.sharma@broadcom.com>
---
 libibverbs/examples/devinfo.c | 23 +++++++++++++++++++++--
 1 file changed, 21 insertions(+), 2 deletions(-)

diff --git a/libibverbs/examples/devinfo.c b/libibverbs/examples/devinfo.c
index bf53eac..63988ba 100644
--- a/libibverbs/examples/devinfo.c
+++ b/libibverbs/examples/devinfo.c
@@ -162,8 +162,18 @@ static const char *vl_str(uint8_t vl_num)
 	}
 }
 
+static const char *gid_type_str(enum ibv_gid_type type)
+{
+	switch (type) {
+	case 0: return "IB/RoCE v1";
+	case 1: return "RoCE v2";
+	default: return "invalid value";
+	}
+}
+
 static int print_all_port_gids(struct ibv_context *ctx, uint8_t port_num, int tbl_len)
 {
+	enum ibv_gid_type type;
 	union ibv_gid gid;
 	int rc = 0;
 	int i;
@@ -175,8 +185,16 @@ static int print_all_port_gids(struct ibv_context *ctx, uint8_t port_num, int tb
 			       port_num, i);
 			return rc;
 		}
+
+		rc = ibv_query_gid_type(ctx, port_num, i, &type);
+		if (rc) {
+			fprintf(stderr, "Failed to query gid type to port %d, index %d\n",
+				port_num, i);
+			return rc;
+		}
+
 		if (!null_gid(&gid))
-			printf("\t\t\tGID[%3d]:\t\t%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x\n",
+			printf("\t\t\tGID[%3d]:\t\t%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x, %s\n",
 			       i,
 			       gid.raw[ 0], gid.raw[ 1],
 			       gid.raw[ 2], gid.raw[ 3],
@@ -185,7 +203,8 @@ static int print_all_port_gids(struct ibv_context *ctx, uint8_t port_num, int tb
 			       gid.raw[ 8], gid.raw[ 9],
 			       gid.raw[10], gid.raw[11],
 			       gid.raw[12], gid.raw[13],
-			       gid.raw[14], gid.raw[15]);
+			       gid.raw[14], gid.raw[15],
+			       gid_type_str(type));
 	}
 	return rc;
 }
-- 
1.8.3.1