diff options
author | Sabrina Dubroca <sd@queasysnail.net> | 2019-12-04 17:35:53 +0300 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-04-29 17:31:17 +0300 |
commit | 5dd6835278454a7c7a045462253625de7c16b13e (patch) | |
tree | 974dbdb940bc3640a55986c8d1fe6321ce4f76fb /net | |
parent | abee5ded9bdb23946348c310245cb25c08240185 (diff) | |
download | linux-5dd6835278454a7c7a045462253625de7c16b13e.tar.xz |
net: ipv6_stub: use ip6_dst_lookup_flow instead of ip6_dst_lookup
commit 6c8991f41546c3c472503dff1ea9daaddf9331c2 upstream.
ipv6_stub uses the ip6_dst_lookup function to allow other modules to
perform IPv6 lookups. However, this function skips the XFRM layer
entirely.
All users of ipv6_stub->ip6_dst_lookup use ip_route_output_flow (via the
ip_route_output_key and ip_route_output helpers) for their IPv4 lookups,
which calls xfrm_lookup_route(). This patch fixes this inconsistent
behavior by switching the stub to ip6_dst_lookup_flow, which also calls
xfrm_lookup_route().
This requires some changes in all the callers, as these two functions
take different arguments and have different return types.
Fixes: 5f81bd2e5d80 ("ipv6: export a stub for IPv6 symbols used by vxlan")
Reported-by: Xiumei Mu <xmu@redhat.com>
Signed-off-by: Sabrina Dubroca <sd@queasysnail.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
[bwh: Backported to 4.19:
- Drop change in lwt_bpf.c
- Delete now-unused "ret" in mlx5e_route_lookup_ipv6()
- Initialise "out_dev" in mlx5e_create_encap_header_ipv6() to avoid
introducing a spurious "may be used uninitialised" warning
- Adjust filenames, context, indentation]
Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'net')
-rw-r--r-- | net/ipv6/addrconf_core.c | 11 | ||||
-rw-r--r-- | net/ipv6/af_inet6.c | 2 | ||||
-rw-r--r-- | net/mpls/af_mpls.c | 7 | ||||
-rw-r--r-- | net/tipc/udp_media.c | 9 |
4 files changed, 16 insertions, 13 deletions
diff --git a/net/ipv6/addrconf_core.c b/net/ipv6/addrconf_core.c index 5cd0029d930e..66a1a0eb2ed0 100644 --- a/net/ipv6/addrconf_core.c +++ b/net/ipv6/addrconf_core.c @@ -127,11 +127,12 @@ int inet6addr_validator_notifier_call_chain(unsigned long val, void *v) } EXPORT_SYMBOL(inet6addr_validator_notifier_call_chain); -static int eafnosupport_ipv6_dst_lookup(struct net *net, struct sock *u1, - struct dst_entry **u2, - struct flowi6 *u3) +static struct dst_entry *eafnosupport_ipv6_dst_lookup_flow(struct net *net, + const struct sock *sk, + struct flowi6 *fl6, + const struct in6_addr *final_dst) { - return -EAFNOSUPPORT; + return ERR_PTR(-EAFNOSUPPORT); } static struct fib6_table *eafnosupport_fib6_get_table(struct net *net, u32 id) @@ -169,7 +170,7 @@ eafnosupport_ip6_mtu_from_fib6(struct fib6_info *f6i, struct in6_addr *daddr, } const struct ipv6_stub *ipv6_stub __read_mostly = &(struct ipv6_stub) { - .ipv6_dst_lookup = eafnosupport_ipv6_dst_lookup, + .ipv6_dst_lookup_flow = eafnosupport_ipv6_dst_lookup_flow, .fib6_get_table = eafnosupport_fib6_get_table, .fib6_table_lookup = eafnosupport_fib6_table_lookup, .fib6_lookup = eafnosupport_fib6_lookup, diff --git a/net/ipv6/af_inet6.c b/net/ipv6/af_inet6.c index 5db88be8b6ec..5c2351deedc8 100644 --- a/net/ipv6/af_inet6.c +++ b/net/ipv6/af_inet6.c @@ -904,7 +904,7 @@ static struct pernet_operations inet6_net_ops = { static const struct ipv6_stub ipv6_stub_impl = { .ipv6_sock_mc_join = ipv6_sock_mc_join, .ipv6_sock_mc_drop = ipv6_sock_mc_drop, - .ipv6_dst_lookup = ip6_dst_lookup, + .ipv6_dst_lookup_flow = ip6_dst_lookup_flow, .fib6_get_table = fib6_get_table, .fib6_table_lookup = fib6_table_lookup, .fib6_lookup = fib6_lookup, diff --git a/net/mpls/af_mpls.c b/net/mpls/af_mpls.c index d5a4db5b3fe7..7623d9aec636 100644 --- a/net/mpls/af_mpls.c +++ b/net/mpls/af_mpls.c @@ -618,16 +618,15 @@ static struct net_device *inet6_fib_lookup_dev(struct net *net, struct net_device *dev; struct dst_entry *dst; struct flowi6 fl6; - int err; if (!ipv6_stub) return ERR_PTR(-EAFNOSUPPORT); memset(&fl6, 0, sizeof(fl6)); memcpy(&fl6.daddr, addr, sizeof(struct in6_addr)); - err = ipv6_stub->ipv6_dst_lookup(net, NULL, &dst, &fl6); - if (err) - return ERR_PTR(err); + dst = ipv6_stub->ipv6_dst_lookup_flow(net, NULL, &fl6, NULL); + if (IS_ERR(dst)) + return ERR_CAST(dst); dev = dst->dev; dev_hold(dev); diff --git a/net/tipc/udp_media.c b/net/tipc/udp_media.c index 382c84d9339d..1d6235479706 100644 --- a/net/tipc/udp_media.c +++ b/net/tipc/udp_media.c @@ -189,10 +189,13 @@ static int tipc_udp_xmit(struct net *net, struct sk_buff *skb, .saddr = src->ipv6, .flowi6_proto = IPPROTO_UDP }; - err = ipv6_stub->ipv6_dst_lookup(net, ub->ubsock->sk, &ndst, - &fl6); - if (err) + ndst = ipv6_stub->ipv6_dst_lookup_flow(net, + ub->ubsock->sk, + &fl6, NULL); + if (IS_ERR(ndst)) { + err = PTR_ERR(ndst); goto tx_error; + } ttl = ip6_dst_hoplimit(ndst); err = udp_tunnel6_xmit_skb(ndst, ub->ubsock->sk, skb, NULL, &src->ipv6, &dst->ipv6, 0, ttl, 0, |