| Message ID | 20201015163038.26992-7-pablo@netfilter.org (mailing list archive) |
|---|---|
| State | Not Applicable |
| Delegated to: | Netdev Maintainers |
| Headers | show |
| Series | [net-next,v2,1/9] netfilter: flowtable: add xmit path types | expand |
On 2020-10-15, at 18:30:35 +0200, Pablo Neira Ayuso wrote: > The egress device in the tuple is obtained from route. Use > dev_fill_forward_path() instead to provide the real ingress device for ^^^^^^^ Should this be "egress"? > this flow whenever this is available. > > Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org> > --- > v2: no changes. > > include/net/netfilter/nf_flow_table.h | 4 ++++ > net/netfilter/nf_flow_table_core.c | 1 + > net/netfilter/nf_flow_table_ip.c | 25 +++++++++++++++++++++++-- > net/netfilter/nft_flow_offload.c | 1 + > 4 files changed, 29 insertions(+), 2 deletions(-) > > diff --git a/include/net/netfilter/nf_flow_table.h b/include/net/netfilter/nf_flow_table.h > index ecb84d4358cc..fe225e881cc7 100644 > --- a/include/net/netfilter/nf_flow_table.h > +++ b/include/net/netfilter/nf_flow_table.h > @@ -117,6 +117,7 @@ struct flow_offload_tuple { > u8 dir; > enum flow_offload_xmit_type xmit_type:8; > u16 mtu; > + u32 oifidx; > > struct dst_entry *dst_cache; > }; > @@ -164,6 +165,9 @@ struct nf_flow_route { > struct { > u32 ifindex; > } in; > + struct { > + u32 ifindex; > + } out; > struct dst_entry *dst; > } tuple[FLOW_OFFLOAD_DIR_MAX]; > }; > diff --git a/net/netfilter/nf_flow_table_core.c b/net/netfilter/nf_flow_table_core.c > index 66abc7f287a3..99f01f08c550 100644 > --- a/net/netfilter/nf_flow_table_core.c > +++ b/net/netfilter/nf_flow_table_core.c > @@ -94,6 +94,7 @@ static int flow_offload_fill_route(struct flow_offload *flow, > } > > flow_tuple->iifidx = route->tuple[dir].in.ifindex; > + flow_tuple->oifidx = route->tuple[dir].out.ifindex; > > if (dst_xfrm(dst)) > flow_tuple->xmit_type = FLOW_OFFLOAD_XMIT_XFRM; > diff --git a/net/netfilter/nf_flow_table_ip.c b/net/netfilter/nf_flow_table_ip.c > index e215c79e6777..92f444db8d9f 100644 > --- a/net/netfilter/nf_flow_table_ip.c > +++ b/net/netfilter/nf_flow_table_ip.c > @@ -228,6 +228,15 @@ static int nf_flow_offload_dst_check(struct dst_entry *dst) > return 0; > } > > +static struct net_device *nf_flow_outdev_lookup(struct net *net, int oifidx, > + struct net_device *dev) > +{ > + if (oifidx == dev->ifindex) > + return dev; > + > + return dev_get_by_index_rcu(net, oifidx); > +} > + > static unsigned int nf_flow_xmit_xfrm(struct sk_buff *skb, > const struct nf_hook_state *state, > struct dst_entry *dst) > @@ -267,7 +276,6 @@ nf_flow_offload_ip_hook(void *priv, struct sk_buff *skb, > dir = tuplehash->tuple.dir; > flow = container_of(tuplehash, struct flow_offload, tuplehash[dir]); > rt = (struct rtable *)flow->tuplehash[dir].tuple.dst_cache; > - outdev = rt->dst.dev; > > if (unlikely(nf_flow_exceeds_mtu(skb, flow->tuplehash[dir].tuple.mtu))) > return NF_ACCEPT; > @@ -286,6 +294,13 @@ nf_flow_offload_ip_hook(void *priv, struct sk_buff *skb, > return NF_ACCEPT; > } > > + outdev = nf_flow_outdev_lookup(state->net, tuplehash->tuple.oifidx, > + rt->dst.dev); > + if (!outdev) { > + flow_offload_teardown(flow); > + return NF_ACCEPT; > + } > + > if (nf_flow_nat_ip(flow, skb, thoff, dir) < 0) > return NF_DROP; > > @@ -517,7 +532,6 @@ nf_flow_offload_ipv6_hook(void *priv, struct sk_buff *skb, > dir = tuplehash->tuple.dir; > flow = container_of(tuplehash, struct flow_offload, tuplehash[dir]); > rt = (struct rt6_info *)flow->tuplehash[dir].tuple.dst_cache; > - outdev = rt->dst.dev; > > if (unlikely(nf_flow_exceeds_mtu(skb, flow->tuplehash[dir].tuple.mtu))) > return NF_ACCEPT; > @@ -533,6 +547,13 @@ nf_flow_offload_ipv6_hook(void *priv, struct sk_buff *skb, > return NF_ACCEPT; > } > > + outdev = nf_flow_outdev_lookup(state->net, tuplehash->tuple.oifidx, > + rt->dst.dev); > + if (!outdev) { > + flow_offload_teardown(flow); > + return NF_ACCEPT; > + } > + > if (skb_try_make_writable(skb, sizeof(*ip6h))) > return NF_DROP; > > diff --git a/net/netfilter/nft_flow_offload.c b/net/netfilter/nft_flow_offload.c > index 4b476b0a3c88..6a6633e2ceeb 100644 > --- a/net/netfilter/nft_flow_offload.c > +++ b/net/netfilter/nft_flow_offload.c > @@ -84,6 +84,7 @@ static int nft_dev_forward_path(struct nf_flow_route *route, > } > > route->tuple[!dir].in.ifindex = info.iifindex; > + route->tuple[dir].out.ifindex = info.iifindex; > > return 0; > } > -- > 2.20.1 J.
diff --git a/include/net/netfilter/nf_flow_table.h b/include/net/netfilter/nf_flow_table.h index ecb84d4358cc..fe225e881cc7 100644 --- a/include/net/netfilter/nf_flow_table.h +++ b/include/net/netfilter/nf_flow_table.h @@ -117,6 +117,7 @@ struct flow_offload_tuple { u8 dir; enum flow_offload_xmit_type xmit_type:8; u16 mtu; + u32 oifidx; struct dst_entry *dst_cache; }; @@ -164,6 +165,9 @@ struct nf_flow_route { struct { u32 ifindex; } in; + struct { + u32 ifindex; + } out; struct dst_entry *dst; } tuple[FLOW_OFFLOAD_DIR_MAX]; }; diff --git a/net/netfilter/nf_flow_table_core.c b/net/netfilter/nf_flow_table_core.c index 66abc7f287a3..99f01f08c550 100644 --- a/net/netfilter/nf_flow_table_core.c +++ b/net/netfilter/nf_flow_table_core.c @@ -94,6 +94,7 @@ static int flow_offload_fill_route(struct flow_offload *flow, } flow_tuple->iifidx = route->tuple[dir].in.ifindex; + flow_tuple->oifidx = route->tuple[dir].out.ifindex; if (dst_xfrm(dst)) flow_tuple->xmit_type = FLOW_OFFLOAD_XMIT_XFRM; diff --git a/net/netfilter/nf_flow_table_ip.c b/net/netfilter/nf_flow_table_ip.c index e215c79e6777..92f444db8d9f 100644 --- a/net/netfilter/nf_flow_table_ip.c +++ b/net/netfilter/nf_flow_table_ip.c @@ -228,6 +228,15 @@ static int nf_flow_offload_dst_check(struct dst_entry *dst) return 0; } +static struct net_device *nf_flow_outdev_lookup(struct net *net, int oifidx, + struct net_device *dev) +{ + if (oifidx == dev->ifindex) + return dev; + + return dev_get_by_index_rcu(net, oifidx); +} + static unsigned int nf_flow_xmit_xfrm(struct sk_buff *skb, const struct nf_hook_state *state, struct dst_entry *dst) @@ -267,7 +276,6 @@ nf_flow_offload_ip_hook(void *priv, struct sk_buff *skb, dir = tuplehash->tuple.dir; flow = container_of(tuplehash, struct flow_offload, tuplehash[dir]); rt = (struct rtable *)flow->tuplehash[dir].tuple.dst_cache; - outdev = rt->dst.dev; if (unlikely(nf_flow_exceeds_mtu(skb, flow->tuplehash[dir].tuple.mtu))) return NF_ACCEPT; @@ -286,6 +294,13 @@ nf_flow_offload_ip_hook(void *priv, struct sk_buff *skb, return NF_ACCEPT; } + outdev = nf_flow_outdev_lookup(state->net, tuplehash->tuple.oifidx, + rt->dst.dev); + if (!outdev) { + flow_offload_teardown(flow); + return NF_ACCEPT; + } + if (nf_flow_nat_ip(flow, skb, thoff, dir) < 0) return NF_DROP; @@ -517,7 +532,6 @@ nf_flow_offload_ipv6_hook(void *priv, struct sk_buff *skb, dir = tuplehash->tuple.dir; flow = container_of(tuplehash, struct flow_offload, tuplehash[dir]); rt = (struct rt6_info *)flow->tuplehash[dir].tuple.dst_cache; - outdev = rt->dst.dev; if (unlikely(nf_flow_exceeds_mtu(skb, flow->tuplehash[dir].tuple.mtu))) return NF_ACCEPT; @@ -533,6 +547,13 @@ nf_flow_offload_ipv6_hook(void *priv, struct sk_buff *skb, return NF_ACCEPT; } + outdev = nf_flow_outdev_lookup(state->net, tuplehash->tuple.oifidx, + rt->dst.dev); + if (!outdev) { + flow_offload_teardown(flow); + return NF_ACCEPT; + } + if (skb_try_make_writable(skb, sizeof(*ip6h))) return NF_DROP; diff --git a/net/netfilter/nft_flow_offload.c b/net/netfilter/nft_flow_offload.c index 4b476b0a3c88..6a6633e2ceeb 100644 --- a/net/netfilter/nft_flow_offload.c +++ b/net/netfilter/nft_flow_offload.c @@ -84,6 +84,7 @@ static int nft_dev_forward_path(struct nf_flow_route *route, } route->tuple[!dir].in.ifindex = info.iifindex; + route->tuple[dir].out.ifindex = info.iifindex; return 0; }
The egress device in the tuple is obtained from route. Use dev_fill_forward_path() instead to provide the real ingress device for this flow whenever this is available. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org> --- v2: no changes. include/net/netfilter/nf_flow_table.h | 4 ++++ net/netfilter/nf_flow_table_core.c | 1 + net/netfilter/nf_flow_table_ip.c | 25 +++++++++++++++++++++++-- net/netfilter/nft_flow_offload.c | 1 + 4 files changed, 29 insertions(+), 2 deletions(-)