According to Guillaume Nault RT_TOS should never be used for IPv6.
Quote:
RT_TOS() is an old macro used to interprete IPv4 TOS as described in
the obsolete RFC 1349. It's conceptually wrong to use it even in IPv4
code, although, given the current state of the code, most of the
existing calls have no consequence.
But using RT_TOS() in IPv6 code is always a bug: IPv6 never had a "TOS"
field to be interpreted the RFC 1349 way. There's no historical
compatibility to worry about.
Matthias May (4):
geneve: do not use RT_TOS for IPv6 flowlabel
vxlan: do not use RT_TOS for IPv6 flowlabel
mlx5: do not use RT_TOS for IPv6 flowlabel
ipv6: do not use RT_TOS for IPv6 flowlabel
drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun.c | 4 ++--
drivers/net/geneve.c | 3 +--
drivers/net/vxlan/vxlan_core.c | 2 +-
net/ipv6/ip6_output.c | 3 +--
4 files changed, 5 insertions(+), 7 deletions(-)
--
2.35.1
According to Guillaume Nault RT_TOS should never be used for IPv6.
Fixes: 1400615d64cf ("vxlan: allow setting ipv6 traffic class")
Signed-off-by: Matthias May <[email protected]>
---
drivers/net/vxlan/vxlan_core.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/vxlan/vxlan_core.c b/drivers/net/vxlan/vxlan_core.c
index 265d4a0245e7..797585fbb004 100644
--- a/drivers/net/vxlan/vxlan_core.c
+++ b/drivers/net/vxlan/vxlan_core.c
@@ -2320,7 +2320,7 @@ static struct dst_entry *vxlan6_get_route(struct vxlan_dev *vxlan,
fl6.flowi6_oif = oif;
fl6.daddr = *daddr;
fl6.saddr = *saddr;
- fl6.flowlabel = ip6_make_flowinfo(RT_TOS(tos), label);
+ fl6.flowlabel = ip6_make_flowinfo(tos, label);
fl6.flowi6_mark = skb->mark;
fl6.flowi6_proto = IPPROTO_UDP;
fl6.fl6_dport = dport;
--
2.35.1