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Commit 8a615c6b authored by Joe Stringer's avatar Joe Stringer Committed by Alexei Starovoitov
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bpf: Allow sk_lookup with IPv6 module 



This is a more complete fix than d71019b5 ("net: core: Fix build
with CONFIG_IPV6=m"), so that IPv6 sockets may be looked up if the IPv6
module is loaded (not just if it's compiled in).

Signed-off-by: default avatarJoe Stringer <joe@wand.net.nz>
Signed-off-by: default avatarAlexei Starovoitov <ast@kernel.org>
parent d04fb13c

include/net/addrconf.h

+5 −0
Original line number Original line Diff line number Diff line
@@ -265,6 +265,11 @@ extern const struct ipv6_stub *ipv6_stub __read_mostly; 
struct ipv6_bpf_stub {

struct ipv6_bpf_stub {

	int (*inet6_bind)(struct sock *sk, struct sockaddr *uaddr, int addr_len,

	int (*inet6_bind)(struct sock *sk, struct sockaddr *uaddr, int addr_len,

			  bool force_bind_address_no_port, bool with_lock);

			  bool force_bind_address_no_port, bool with_lock);

	struct sock *(*udp6_lib_lookup)(struct net *net,

					const struct in6_addr *saddr, __be16 sport,

					const struct in6_addr *daddr, __be16 dport,

					int dif, int sdif, struct udp_table *tbl,

					struct sk_buff *skb);

};

};

extern const struct ipv6_bpf_stub *ipv6_bpf_stub __read_mostly;

extern const struct ipv6_bpf_stub *ipv6_bpf_stub __read_mostly;

net/core/filter.c

+7 −5
Original line number Original line Diff line number Diff line
@@ -4717,7 +4717,7 @@ static struct sock *sk_lookup(struct net *net, struct bpf_sock_tuple *tuple, 
			sk = __udp4_lib_lookup(net, src4, tuple->ipv4.sport,

			sk = __udp4_lib_lookup(net, src4, tuple->ipv4.sport,

					       dst4, tuple->ipv4.dport,

					       dst4, tuple->ipv4.dport,

					       dif, sdif, &udp_table, skb);

					       dif, sdif, &udp_table, skb);

#if IS_REACHABLE(CONFIG_IPV6)

#if IS_ENABLED(CONFIG_IPV6)

	} else {

	} else {

		struct in6_addr *src6 = (struct in6_addr *)&tuple->ipv6.saddr;

		struct in6_addr *src6 = (struct in6_addr *)&tuple->ipv6.saddr;

		struct in6_addr *dst6 = (struct in6_addr *)&tuple->ipv6.daddr;

		struct in6_addr *dst6 = (struct in6_addr *)&tuple->ipv6.daddr;
@@ -4728,10 +4728,12 @@ static struct sock *sk_lookup(struct net *net, struct bpf_sock_tuple *tuple, 
					    src6, tuple->ipv6.sport,

					    src6, tuple->ipv6.sport,

					    dst6, tuple->ipv6.dport,

					    dst6, tuple->ipv6.dport,

					    dif, sdif, &refcounted);

					    dif, sdif, &refcounted);

		else

		else if (likely(ipv6_bpf_stub))

			sk = __udp6_lib_lookup(net, src6, tuple->ipv6.sport,

			sk = ipv6_bpf_stub->udp6_lib_lookup(net,

							    src6, tuple->ipv6.sport,

							    dst6, tuple->ipv6.dport,

							    dst6, tuple->ipv6.dport,

					       dif, sdif, &udp_table, skb);

							    dif, sdif,

							    &udp_table, skb);

#endif

#endif

	}

	}

net/ipv6/af_inet6.c

+1 −0
Original line number Original line Diff line number Diff line
@@ -901,6 +901,7 @@ static const struct ipv6_stub ipv6_stub_impl = { 




static const struct ipv6_bpf_stub ipv6_bpf_stub_impl = {

static const struct ipv6_bpf_stub ipv6_bpf_stub_impl = {

	.inet6_bind = __inet6_bind,

	.inet6_bind = __inet6_bind,

	.udp6_lib_lookup = __udp6_lib_lookup,

};

};





static int __init inet6_init(void)

static int __init inet6_init(void)