From 7521695ca299ceb723dc6b17f304b91300b3b16c Mon Sep 17 00:00:00 2001
From: Phil Sutter <psutter@redhat.com>
Date: Wed, 6 Feb 2019 14:51:57 +0100
Subject: [PATCH] tc/act_tunnel_key: Enable setup of tos and ttl

Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1641909
Upstream Status: iproute2.git commit 9f89b0cc0eda2
Conflicts:
* Context change due to missing commits
  59eb271d1d259 ("tc: m_tunnel_key: add csum/nocsum option") and
  6217917a38268 ("tc: m_tunnel_key: Add tunnel option support to act_tunnel_key").
* Adjusted tunnel_key_print_tos_ttl() to missing commit 8feb516bfcdd9
  ("tc: jsonify tunnel_key action").

commit 9f89b0cc0eda2ef52d8850b0610f3e2e09fd7c1c
Author: Or Gerlitz <ogerlitz@mellanox.com>
Date:   Thu Jul 19 14:02:14 2018 +0300

    tc/act_tunnel_key: Enable setup of tos and ttl

    Allow to set tos and ttl for the tunnel.

    For example, here's encap rule that sets tos to the tunnel:

    tc filter add dev eth0_0 protocol ip parent ffff: prio 10 flower \
       src_mac e4:11:22:33:44:50 dst_mac e4:11:22:33:44:70 \
       action tunnel_key set src_ip 192.168.10.1 dst_ip 192.168.10.2 id 100 dst_port 4789 tos 0x30 \
       action mirred egress redirect dev vxlan_sys_4789

    Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
    Reviewed-by: Roi Dayan <roid@mellanox.com>
    Acked-by: Jiri Pirko <jiri@mellanox.com>
    Signed-off-by: David Ahern <dsahern@gmail.com>
---
 man/man8/tc-tunnel_key.8 |  8 ++++++++
 tc/m_tunnel_key.c        | 49 ++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 57 insertions(+)

diff --git a/man/man8/tc-tunnel_key.8 b/man/man8/tc-tunnel_key.8
index 52fa585..5e93c59 100644
--- a/man/man8/tc-tunnel_key.8
+++ b/man/man8/tc-tunnel_key.8
@@ -16,6 +16,8 @@ tunnel_key - Tunnel metadata manipulation
 .IR ADDRESS
 .BI id " KEY_ID"
 .BI dst_port " UDP_PORT"
+.BI tos " TOS"
+.BI ttl " TTL"
 
 .SH DESCRIPTION
 The
@@ -77,6 +79,12 @@ Outer header destination IP address (IPv4 or IPv6)
 .TP
 .B dst_port
 Outer header destination UDP port
+.TP
+.B tos
+Outer header TOS
+.TP
+.B ttl
+Outer header TTL
 .RE
 .SH EXAMPLES
 The following example encapsulates incoming ICMP packets on eth0 into a vxlan
diff --git a/tc/m_tunnel_key.c b/tc/m_tunnel_key.c
index acbcfc1..60fd1c4 100644
--- a/tc/m_tunnel_key.c
+++ b/tc/m_tunnel_key.c
@@ -80,6 +80,22 @@ static int tunnel_key_parse_dst_port(char *str, int type, struct nlmsghdr *n)
 	return 0;
 }
 
+static int tunnel_key_parse_tos_ttl(char *str, int type, struct nlmsghdr *n)
+{
+	int ret;
+	__u8 val;
+
+	ret = get_u8(&val, str, 10);
+	if (ret)
+		ret = get_u8(&val, str, 16);
+	if (ret)
+		return -1;
+
+	addattr8(n, MAX_MSG, type, val);
+
+	return 0;
+}
+
 static int parse_tunnel_key(struct action_util *a, int *argc_p, char ***argv_p,
 			    int tca_id, struct nlmsghdr *n)
 {
@@ -154,6 +170,22 @@ static int parse_tunnel_key(struct action_util *a, int *argc_p, char ***argv_p,
 				fprintf(stderr, "Illegal \"dst port\"\n");
 				return -1;
 			}
+		} else if (matches(*argv, "tos") == 0) {
+			NEXT_ARG();
+			ret = tunnel_key_parse_tos_ttl(*argv,
+							TCA_TUNNEL_KEY_ENC_TOS, n);
+			if (ret < 0) {
+				fprintf(stderr, "Illegal \"tos\"\n");
+				return -1;
+			}
+		} else if (matches(*argv, "ttl") == 0) {
+			NEXT_ARG();
+			ret = tunnel_key_parse_tos_ttl(*argv,
+							TCA_TUNNEL_KEY_ENC_TTL, n);
+			if (ret < 0) {
+				fprintf(stderr, "Illegal \"ttl\"\n");
+				return -1;
+			}
 		} else if (matches(*argv, "help") == 0) {
 			usage();
 		} else {
@@ -231,6 +263,19 @@ static void tunnel_key_print_dst_port(FILE *f, char *name,
 	fprintf(f, "\n\t%s %d", name, rta_getattr_be16(attr));
 }
 
+static void tunnel_key_print_tos_ttl(FILE *f, char *name,
+				     struct rtattr *attr)
+{
+	if (!attr)
+		return;
+
+	if (matches(name, "tos") == 0 && rta_getattr_u8(attr) != 0) {
+		fprintf(f, "\n\t%s 0x%x", name, rta_getattr_u8(attr));
+	} else if (matches(name, "ttl") == 0 && rta_getattr_u8(attr) != 0) {
+		fprintf(f, "\n\t%s %u", name, rta_getattr_u8(attr));
+	}
+}
+
 static int print_tunnel_key(struct action_util *au, FILE *f, struct rtattr *arg)
 {
 	struct rtattr *tb[TCA_TUNNEL_KEY_MAX + 1];
@@ -267,6 +312,10 @@ static int print_tunnel_key(struct action_util *au, FILE *f, struct rtattr *arg)
 					tb[TCA_TUNNEL_KEY_ENC_KEY_ID]);
 		tunnel_key_print_dst_port(f, "dst_port",
 					  tb[TCA_TUNNEL_KEY_ENC_DST_PORT]);
+		tunnel_key_print_tos_ttl(f, "tos",
+					  tb[TCA_TUNNEL_KEY_ENC_TOS]);
+		tunnel_key_print_tos_ttl(f, "ttl",
+					  tb[TCA_TUNNEL_KEY_ENC_TTL]);
 		break;
 	}
 	fprintf(f, " %s", action_n2a(parm->action));
-- 
1.8.3.1