[PATCH iproute2] erspan: fix JSON output

[Stephen Hemminger]

The format for erspan output is not valid JSON.
The direction should be value and erspan_dir should be the key.

Fixes: 289763626721 ("erspan: add erspan version II support")
Cc: u9012...@gmail.com
Reported-by: Christian Pössinger <christ...@poessinger.com>
Signed-off-by: Stephen Hemminger <step...@networkplumber.org>
---
 ip/link_gre6.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/ip/link_gre6.c b/ip/link_gre6.c
index 9d270f4b4455..f33598af8989 100644
--- a/ip/link_gre6.c
+++ b/ip/link_gre6.c
@@ -594,10 +594,10 @@ static void gre_print_opt(struct link_util *lu, FILE *f, 
struct rtattr *tb[])
 
                if (erspan_dir == 0)
                        print_string(PRINT_ANY, "erspan_dir",
-                                    "erspan_dir ingress ", NULL);
+                                    "erspan_dir %s ", "ingress");
                else
                        print_string(PRINT_ANY, "erspan_dir",
-                                    "erspan_dir egress ", NULL);
+                                    "erspan_dir %s ", "egress");
        }
 
        if (tb[IFLA_GRE_ERSPAN_HWID]) {
-- 
2.30.2