diff options
author | Florian Westphal <fw@strlen.de> | 2019-02-02 10:17:00 +0100 |
---|---|---|
committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2019-02-04 18:21:12 +0100 |
commit | ac02bcf9cc1e4aefb0a7156a2ae26e8396b15f24 (patch) | |
tree | f18ef2303361b54f638b972bbef707018b7a346d /net | |
parent | netfilter: nat: remove module dependency on ipv6 core (diff) | |
download | linux-dev-ac02bcf9cc1e4aefb0a7156a2ae26e8396b15f24.tar.xz linux-dev-ac02bcf9cc1e4aefb0a7156a2ae26e8396b15f24.zip |
netfilter: ipv6: avoid indirect calls for IPV6=y case
indirect calls are only needed if ipv6 is a module.
Add helpers to abstract the v6ops indirections and use them instead.
fragment, reroute and route_input are kept as indirect calls.
The first two are not not used in hot path and route_input is only
used by bridge netfilter.
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'net')
-rw-r--r-- | net/ipv6/netfilter.c | 15 | ||||
-rw-r--r-- | net/ipv6/netfilter/nft_fib_ipv6.c | 9 | ||||
-rw-r--r-- | net/netfilter/utils.c | 6 | ||||
-rw-r--r-- | net/netfilter/xt_addrtype.c | 16 |
4 files changed, 17 insertions, 29 deletions
diff --git a/net/ipv6/netfilter.c b/net/ipv6/netfilter.c index 0a5caf263889..a8263031f3a6 100644 --- a/net/ipv6/netfilter.c +++ b/net/ipv6/netfilter.c @@ -84,8 +84,8 @@ static int nf_ip6_reroute(struct sk_buff *skb, return 0; } -static int nf_ip6_route(struct net *net, struct dst_entry **dst, - struct flowi *fl, bool strict) +int __nf_ip6_route(struct net *net, struct dst_entry **dst, + struct flowi *fl, bool strict) { static const struct ipv6_pinfo fake_pinfo; static const struct inet_sock fake_sk = { @@ -105,17 +105,18 @@ static int nf_ip6_route(struct net *net, struct dst_entry **dst, *dst = result; return err; } +EXPORT_SYMBOL_GPL(__nf_ip6_route); static const struct nf_ipv6_ops ipv6ops = { - .chk_addr = ipv6_chk_addr, - .route_input = ip6_route_input, - .fragment = ip6_fragment, - .route = nf_ip6_route, - .reroute = nf_ip6_reroute, #if IS_MODULE(CONFIG_IPV6) + .chk_addr = ipv6_chk_addr, .route_me_harder = ip6_route_me_harder, .dev_get_saddr = ipv6_dev_get_saddr, + .route = __nf_ip6_route, #endif + .route_input = ip6_route_input, + .fragment = ip6_fragment, + .reroute = nf_ip6_reroute, }; int __init ipv6_netfilter_init(void) diff --git a/net/ipv6/netfilter/nft_fib_ipv6.c b/net/ipv6/netfilter/nft_fib_ipv6.c index 36be3cf0adef..73cdc0bc63f7 100644 --- a/net/ipv6/netfilter/nft_fib_ipv6.c +++ b/net/ipv6/netfilter/nft_fib_ipv6.c @@ -59,7 +59,6 @@ static u32 __nft_fib6_eval_type(const struct nft_fib *priv, struct ipv6hdr *iph) { const struct net_device *dev = NULL; - const struct nf_ipv6_ops *v6ops; int route_err, addrtype; struct rt6_info *rt; struct flowi6 fl6 = { @@ -68,10 +67,6 @@ static u32 __nft_fib6_eval_type(const struct nft_fib *priv, }; u32 ret = 0; - v6ops = nf_get_ipv6_ops(); - if (!v6ops) - return RTN_UNREACHABLE; - if (priv->flags & NFTA_FIB_F_IIF) dev = nft_in(pkt); else if (priv->flags & NFTA_FIB_F_OIF) @@ -79,10 +74,10 @@ static u32 __nft_fib6_eval_type(const struct nft_fib *priv, nft_fib6_flowi_init(&fl6, priv, pkt, dev, iph); - if (dev && v6ops->chk_addr(nft_net(pkt), &fl6.daddr, dev, true)) + if (dev && nf_ipv6_chk_addr(nft_net(pkt), &fl6.daddr, dev, true)) ret = RTN_LOCAL; - route_err = v6ops->route(nft_net(pkt), (struct dst_entry **)&rt, + route_err = nf_ip6_route(nft_net(pkt), (struct dst_entry **)&rt, flowi6_to_flowi(&fl6), false); if (route_err) goto err; diff --git a/net/netfilter/utils.c b/net/netfilter/utils.c index 55af9f247993..06dc55590441 100644 --- a/net/netfilter/utils.c +++ b/net/netfilter/utils.c @@ -162,7 +162,7 @@ EXPORT_SYMBOL_GPL(nf_checksum_partial); int nf_route(struct net *net, struct dst_entry **dst, struct flowi *fl, bool strict, unsigned short family) { - const struct nf_ipv6_ops *v6ops; + const struct nf_ipv6_ops *v6ops __maybe_unused; int ret = 0; switch (family) { @@ -170,9 +170,7 @@ int nf_route(struct net *net, struct dst_entry **dst, struct flowi *fl, ret = nf_ip_route(net, dst, fl, strict); break; case AF_INET6: - v6ops = rcu_dereference(nf_ipv6_ops); - if (v6ops) - ret = v6ops->route(net, dst, fl, strict); + ret = nf_ip6_route(net, dst, fl, strict); break; } diff --git a/net/netfilter/xt_addrtype.c b/net/netfilter/xt_addrtype.c index 89e281b3bfc2..29987ff03621 100644 --- a/net/netfilter/xt_addrtype.c +++ b/net/netfilter/xt_addrtype.c @@ -36,7 +36,6 @@ MODULE_ALIAS("ip6t_addrtype"); static u32 match_lookup_rt6(struct net *net, const struct net_device *dev, const struct in6_addr *addr, u16 mask) { - const struct nf_ipv6_ops *v6ops; struct flowi6 flow; struct rt6_info *rt; u32 ret = 0; @@ -47,18 +46,13 @@ static u32 match_lookup_rt6(struct net *net, const struct net_device *dev, if (dev) flow.flowi6_oif = dev->ifindex; - v6ops = nf_get_ipv6_ops(); - if (v6ops) { - if (dev && (mask & XT_ADDRTYPE_LOCAL)) { - if (v6ops->chk_addr(net, addr, dev, true)) - ret = XT_ADDRTYPE_LOCAL; - } - route_err = v6ops->route(net, (struct dst_entry **)&rt, - flowi6_to_flowi(&flow), false); - } else { - route_err = 1; + if (dev && (mask & XT_ADDRTYPE_LOCAL)) { + if (nf_ipv6_chk_addr(net, addr, dev, true)) + ret = XT_ADDRTYPE_LOCAL; } + route_err = nf_ip6_route(net, (struct dst_entry **)&rt, + flowi6_to_flowi(&flow), false); if (route_err) return XT_ADDRTYPE_UNREACHABLE; |