5.10-stable review patch. If anyone has any objections, please let me know.
------------------
From: David Ahern <dsahern@xxxxxxxxxx>
commit db53cd3d88dc328dea2e968c9c8d3b4294a8a674 upstream.
Ido reported that the commit referenced in the Fixes tag broke
a gre use case with dummy devices. Add a check to ip_tunnel_init_flow
to see if the oif is an l3mdev port and if so set the oif to 0 to
avoid the oif comparison in fib_lookup_good_nhc.
Fixes: 40867d74c374 ("net: Add l3mdev index to flow struct and avoid oif reset for port devices")
Reported-by: Ido Schimmel <idosch@xxxxxxxxxx>
Signed-off-by: David Ahern <dsahern@xxxxxxxxxx>
Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/net/ethernet/mellanox/mlxsw/spectrum_span.c | 2 +-
include/net/ip_tunnels.h | 11 +++++++++--
net/ipv4/ip_gre.c | 4 ++--
net/ipv4/ip_tunnel.c | 9 +++++----
4 files changed, 17 insertions(+), 9 deletions(-)
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_span.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_span.c
@@ -422,7 +422,7 @@ mlxsw_sp_span_gretap4_route(const struct
parms = mlxsw_sp_ipip_netdev_parms4(to_dev);
ip_tunnel_init_flow(&fl4, parms.iph.protocol, *daddrp, *saddrp,
- 0, 0, parms.link, tun->fwmark, 0);
+ 0, 0, dev_net(to_dev), parms.link, tun->fwmark, 0);
rt = ip_route_output_key(tun->net, &fl4);
if (IS_ERR(rt))
--- a/include/net/ip_tunnels.h
+++ b/include/net/ip_tunnels.h
@@ -240,11 +240,18 @@ static inline __be32 tunnel_id_to_key32(
static inline void ip_tunnel_init_flow(struct flowi4 *fl4,
int proto,
__be32 daddr, __be32 saddr,
- __be32 key, __u8 tos, int oif,
+ __be32 key, __u8 tos,
+ struct net *net, int oif,
__u32 mark, __u32 tun_inner_hash)
{
memset(fl4, 0, sizeof(*fl4));
- fl4->flowi4_oif = oif;
+
+ if (oif) {
+ fl4->flowi4_l3mdev = l3mdev_master_upper_ifindex_by_index_rcu(net, oif);
+ /* Legacy VRF/l3mdev use case */
+ fl4->flowi4_oif = fl4->flowi4_l3mdev ? 0 : oif;
+ }
+
fl4->daddr = daddr;
fl4->saddr = saddr;
fl4->flowi4_tos = tos;
--- a/net/ipv4/ip_gre.c
+++ b/net/ipv4/ip_gre.c
@@ -608,8 +608,8 @@ static int gre_fill_metadata_dst(struct
key = &info->key;
ip_tunnel_init_flow(&fl4, IPPROTO_GRE, key->u.ipv4.dst, key->u.ipv4.src,
tunnel_id_to_key32(key->tun_id),
- key->tos & ~INET_ECN_MASK, 0, skb->mark,
- skb_get_hash(skb));
+ key->tos & ~INET_ECN_MASK, dev_net(dev), 0,
+ skb->mark, skb_get_hash(skb));
rt = ip_route_output_key(dev_net(dev), &fl4);
if (IS_ERR(rt))
return PTR_ERR(rt);
--- a/net/ipv4/ip_tunnel.c
+++ b/net/ipv4/ip_tunnel.c
@@ -294,8 +294,8 @@ static int ip_tunnel_bind_dev(struct net
ip_tunnel_init_flow(&fl4, iph->protocol, iph->daddr,
iph->saddr, tunnel->parms.o_key,
- RT_TOS(iph->tos), tunnel->parms.link,
- tunnel->fwmark, 0);
+ RT_TOS(iph->tos), dev_net(dev),
+ tunnel->parms.link, tunnel->fwmark, 0);
rt = ip_route_output_key(tunnel->net, &fl4);
if (!IS_ERR(rt)) {
@@ -597,7 +597,7 @@ void ip_md_tunnel_xmit(struct sk_buff *s
}
ip_tunnel_init_flow(&fl4, proto, key->u.ipv4.dst, key->u.ipv4.src,
tunnel_id_to_key32(key->tun_id), RT_TOS(tos),
- 0, skb->mark, skb_get_hash(skb));
+ dev_net(dev), 0, skb->mark, skb_get_hash(skb));
if (tunnel->encap.type != TUNNEL_ENCAP_NONE)
goto tx_error;
@@ -753,7 +753,8 @@ void ip_tunnel_xmit(struct sk_buff *skb,
}
ip_tunnel_init_flow(&fl4, protocol, dst, tnl_params->saddr,
- tunnel->parms.o_key, RT_TOS(tos), tunnel->parms.link,
+ tunnel->parms.o_key, RT_TOS(tos),
+ dev_net(dev), tunnel->parms.link,
tunnel->fwmark, skb_get_hash(skb));
if (ip_tunnel_encap(skb, tunnel, &protocol, &fl4) < 0)
