[PATCH iproute-next] tc: m_tunnel_key: Allow key-less tunnels

[Adi Nissim]

Change the id parameter of the tunnel_key set action from mandatory to
optional.

Some tunneling protocols (e.g. GRE) specify the id as an optional field.

Signed-off-by: Adi Nissim <a...@mellanox.com>
---
 man/man8/tc-tunnel_key.8 | 4 ++--
 tc/m_tunnel_key.c        | 6 ++----
 2 files changed, 4 insertions(+), 6 deletions(-)

diff --git a/man/man8/tc-tunnel_key.8 b/man/man8/tc-tunnel_key.8
index dc8421b..2145eb6 100644
--- a/man/man8/tc-tunnel_key.8
+++ b/man/man8/tc-tunnel_key.8
@@ -59,12 +59,12 @@ above).
 .TP
 .B set
 Set tunnel metadata to be used by the IP tunnel device. Requires
-.B id
-,
 .B src_ip
 and
 .B dst_ip
 options.
+.B id
+,
 .B dst_port
 and
 .B geneve_opts
diff --git a/tc/m_tunnel_key.c b/tc/m_tunnel_key.c
index e9e71e4..9449287 100644
--- a/tc/m_tunnel_key.c
+++ b/tc/m_tunnel_key.c
@@ -25,7 +25,7 @@ static void explain(void)
        fprintf(stderr, "       tunnel_key set <TUNNEL_KEY>\n");
        fprintf(stderr,
                "Where TUNNEL_KEY is a combination of:\n"
-               "id <TUNNELID> (mandatory)\n"
+               "id <TUNNELID>\n"
                "src_ip <IP> (mandatory)\n"
                "dst_ip <IP> (mandatory)\n"
                "dst_port <UDP_PORT>\n"
@@ -217,7 +217,6 @@ static int parse_tunnel_key(struct action_util *a, int 
*argc_p, char ***argv_p,
        int ret;
        int has_src_ip = 0;
        int has_dst_ip = 0;
-       int has_key_id = 0;
        int csum = 1;

        if (matches(*argv, "tunnel_key") != 0)
@@ -273,7 +272,6 @@ static int parse_tunnel_key(struct action_util *a, int 
*argc_p, char ***argv_p,
                                fprintf(stderr, "Illegal \"id\"\n");
                                return -1;
                        }
-                       has_key_id = 1;
                } else if (matches(*argv, "dst_port") == 0) {
                        NEXT_ARG();
                        ret = tunnel_key_parse_dst_port(*argv,
@@ -335,7 +333,7 @@ static int parse_tunnel_key(struct action_util *a, int 
*argc_p, char ***argv_p,
        }

        if (action == TCA_TUNNEL_KEY_ACT_SET &&
-           (!has_src_ip || !has_dst_ip || !has_key_id)) {
+           (!has_src_ip || !has_dst_ip)) {
                fprintf(stderr, "set needs tunnel_key parameters\n");
                explain();
                return -1;
--
1.8.3.1