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ipv6: add ipv6_fragment hook in ipv6_stub

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Add ipv6_fragment to ipv6_stub to avoid calling netfilter when
access ip6_fragment.

Signed-off-by: wenxu <wenxu@ucloud.cn>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
wenxu 2020-08-28 23:14:31 +08:00 committed by David S. Miller
parent 353ff8ccad
commit 1d97898b36
3 changed files with 12 additions and 0 deletions
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3
include/net/ipv6_stubs.h
View File

@ -63,6 +63,9 @@ struct ipv6_stub {
int encap_type); int encap_type);
#endif #endif
struct neigh_table *nd_tbl; struct neigh_table *nd_tbl;
int (*ipv6_fragment)(struct net *net, struct sock *sk, struct sk_buff *skb,
int (*output)(struct net *, struct sock *, struct sk_buff *));
}; };
extern const struct ipv6_stub *ipv6_stub __read_mostly; extern const struct ipv6_stub *ipv6_stub __read_mostly;

8
net/ipv6/addrconf_core.c
View File

@ -191,6 +191,13 @@ static int eafnosupport_ip6_del_rt(struct net *net, struct fib6_info *rt,
return -EAFNOSUPPORT; return -EAFNOSUPPORT;
} }
static int eafnosupport_ipv6_fragment(struct net *net, struct sock *sk, struct sk_buff *skb,
int (*output)(struct net *, struct sock *, struct sk_buff *))
{
kfree_skb(skb);
return -EAFNOSUPPORT;
}
const struct ipv6_stub *ipv6_stub __read_mostly = &(struct ipv6_stub) { const struct ipv6_stub *ipv6_stub __read_mostly = &(struct ipv6_stub) {
.ipv6_dst_lookup_flow = eafnosupport_ipv6_dst_lookup_flow, .ipv6_dst_lookup_flow = eafnosupport_ipv6_dst_lookup_flow,
.ipv6_route_input = eafnosupport_ipv6_route_input, .ipv6_route_input = eafnosupport_ipv6_route_input,
@ -201,6 +208,7 @@ const struct ipv6_stub *ipv6_stub __read_mostly = &(struct ipv6_stub) {
.ip6_mtu_from_fib6 = eafnosupport_ip6_mtu_from_fib6, .ip6_mtu_from_fib6 = eafnosupport_ip6_mtu_from_fib6,
.fib6_nh_init = eafnosupport_fib6_nh_init, .fib6_nh_init = eafnosupport_fib6_nh_init,
.ip6_del_rt = eafnosupport_ip6_del_rt, .ip6_del_rt = eafnosupport_ip6_del_rt,
.ipv6_fragment = eafnosupport_ipv6_fragment,
}; };
EXPORT_SYMBOL_GPL(ipv6_stub); EXPORT_SYMBOL_GPL(ipv6_stub);

1
net/ipv6/af_inet6.c
View File

@ -1027,6 +1027,7 @@ static const struct ipv6_stub ipv6_stub_impl = {
.xfrm6_rcv_encap = xfrm6_rcv_encap, .xfrm6_rcv_encap = xfrm6_rcv_encap,
#endif #endif
.nd_tbl = &nd_tbl, .nd_tbl = &nd_tbl,
.ipv6_fragment = ip6_fragment,
}; };
static const struct ipv6_bpf_stub ipv6_bpf_stub_impl = { static const struct ipv6_bpf_stub ipv6_bpf_stub_impl = {