[ovs-dev] [PATCH 1/4] lib/tc: Handle ttl for ipv6 too

[Or Gerlitz]

TTL can and should be used to match on IPv6's hop-limit, fix that.

Fixes: ab7ecf266b0a ('netdev-tc-offloads: Add nw_ttl matching using flower')
Fixes: 0b4b5203d12e ('tc: Add ip layer ttl matching')
Signed-off-by: Or Gerlitz <ogerlitz at mellanox.com>
Reviewed-by: Roi Dayan <roid at mellanox.com>
---
 lib/netdev-tc-offloads.c | 4 ++--
 lib/tc.c                 | 3 ++-
 2 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/lib/netdev-tc-offloads.c b/lib/netdev-tc-offloads.c
index 04548c7..2a6dd6d 100644
--- a/lib/netdev-tc-offloads.c
+++ b/lib/netdev-tc-offloads.c
@@ -1025,8 +1025,10 @@ netdev_tc_flow_put(struct netdev *netdev, struct match *match,
     if (is_ip_any(key)) {
         flower.key.ip_proto = key->nw_proto;
         flower.mask.ip_proto = mask->nw_proto;
+        mask->nw_proto = 0;
         flower.key.ip_ttl = key->nw_ttl;
         flower.mask.ip_ttl = mask->nw_ttl;
+        mask->nw_ttl = 0;
 
         if (mask->nw_frag & FLOW_NW_FRAG_ANY) {
             flower.mask.flags |= TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT;
@@ -1073,8 +1075,6 @@ netdev_tc_flow_put(struct netdev *netdev, struct match *match,
         }
 
         mask->nw_tos = 0;
-        mask->nw_proto = 0;
-        mask->nw_ttl = 0;
 
         if (key->dl_type == htons(ETH_P_IP)) {
             flower.key.ipv4.ipv4_src = key->nw_src;
diff --git a/lib/tc.c b/lib/tc.c
index 2157135..f3fb59c 100644
--- a/lib/tc.c
+++ b/lib/tc.c
@@ -1625,6 +1625,8 @@ nl_msg_put_flower_options(struct ofpbuf *request, struct tc_flower *flower)
     FLOWER_PUT_MASKED_VALUE(src_mac, TCA_FLOWER_KEY_ETH_SRC);
 
     if (host_eth_type == ETH_P_IP || host_eth_type == ETH_P_IPV6) {
+        FLOWER_PUT_MASKED_VALUE(ip_ttl, TCA_FLOWER_KEY_IP_TTL);
+
         if (flower->mask.ip_proto && flower->key.ip_proto) {
             nl_msg_put_u8(request, TCA_FLOWER_KEY_IP_PROTO,
                           flower->key.ip_proto);
@@ -1653,7 +1655,6 @@ nl_msg_put_flower_options(struct ofpbuf *request, struct tc_flower *flower)
     if (host_eth_type == ETH_P_IP) {
             FLOWER_PUT_MASKED_VALUE(ipv4.ipv4_src, TCA_FLOWER_KEY_IPV4_SRC);
             FLOWER_PUT_MASKED_VALUE(ipv4.ipv4_dst, TCA_FLOWER_KEY_IPV4_DST);
-            FLOWER_PUT_MASKED_VALUE(ip_ttl, TCA_FLOWER_KEY_IP_TTL);
     } else if (host_eth_type == ETH_P_IPV6) {
             FLOWER_PUT_MASKED_VALUE(ipv6.ipv6_src, TCA_FLOWER_KEY_IPV6_SRC);
             FLOWER_PUT_MASKED_VALUE(ipv6.ipv6_dst, TCA_FLOWER_KEY_IPV6_DST);
-- 
2.5.5