From: Florian Westphal Date: Tue, 15 Jan 2019 21:03:35 +0000 (+0100) Subject: netfilter: conntrack: gre: switch module to be built-in X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=22fc4c4c9fd6;p=openwrt%2Fstaging%2Fblogic.git netfilter: conntrack: gre: switch module to be built-in This makes the last of the modular l4 trackers 'bool'. After this, all infrastructure to handle dynamic l4 protocol registration becomes obsolete and can be removed in followup patches. Old: 302824 net/netfilter/nf_conntrack.ko 21504 net/netfilter/nf_conntrack_proto_gre.ko New: 313728 net/netfilter/nf_conntrack.ko Old: text data bss dec hex filename 6281 1732 4 8017 1f51 nf_conntrack_proto_gre.ko 108356 20613 236 129205 1f8b5 nf_conntrack.ko New: 112095 21381 240 133716 20a54 nf_conntrack.ko The size increase is only temporary. Signed-off-by: Florian Westphal Signed-off-by: Pablo Neira Ayuso --- diff --git a/include/linux/netfilter/nf_conntrack_proto_gre.h b/include/linux/netfilter/nf_conntrack_proto_gre.h index 222c9d3d453f..59714e9ee4ef 100644 --- a/include/linux/netfilter/nf_conntrack_proto_gre.h +++ b/include/linux/netfilter/nf_conntrack_proto_gre.h @@ -22,23 +22,11 @@ struct nf_ct_gre_keymap { struct rcu_head rcu; }; -enum grep_conntrack { - GRE_CT_UNREPLIED, - GRE_CT_REPLIED, - GRE_CT_MAX -}; - -struct netns_proto_gre { - struct nf_proto_net nf; - rwlock_t keymap_lock; - struct list_head keymap_list; - unsigned int gre_timeouts[GRE_CT_MAX]; -}; - /* add new tuple->key_reply pair to keymap */ int nf_ct_gre_keymap_add(struct nf_conn *ct, enum ip_conntrack_dir dir, struct nf_conntrack_tuple *t); +void nf_ct_gre_keymap_flush(struct net *net); /* delete keymap entries */ void nf_ct_gre_keymap_destroy(struct nf_conn *ct); diff --git a/include/net/netfilter/ipv4/nf_conntrack_ipv4.h b/include/net/netfilter/ipv4/nf_conntrack_ipv4.h index 135ee702c7b0..2c8c2b023848 100644 --- a/include/net/netfilter/ipv4/nf_conntrack_ipv4.h +++ b/include/net/netfilter/ipv4/nf_conntrack_ipv4.h @@ -22,5 +22,8 @@ extern const struct nf_conntrack_l4proto nf_conntrack_l4proto_sctp; #ifdef CONFIG_NF_CT_PROTO_UDPLITE extern const struct nf_conntrack_l4proto nf_conntrack_l4proto_udplite; #endif +#ifdef CONFIG_NF_CT_PROTO_GRE +extern const struct nf_conntrack_l4proto nf_conntrack_l4proto_gre; +#endif #endif /*_NF_CONNTRACK_IPV4_H*/ diff --git a/include/net/netfilter/nf_conntrack_l4proto.h b/include/net/netfilter/nf_conntrack_l4proto.h index 46d554806eb3..fded3f164dcc 100644 --- a/include/net/netfilter/nf_conntrack_l4proto.h +++ b/include/net/netfilter/nf_conntrack_l4proto.h @@ -239,4 +239,11 @@ static inline struct nf_sctp_net *nf_sctp_pernet(struct net *net) } #endif +#ifdef CONFIG_NF_CT_PROTO_GRE +static inline struct nf_gre_net *nf_gre_pernet(struct net *net) +{ + return &net->ct.nf_ct_proto.gre; +} +#endif + #endif /*_NF_CONNTRACK_PROTOCOL_H*/ diff --git a/include/net/netns/conntrack.h b/include/net/netns/conntrack.h index 51cba0b8adf5..c72f413a2d4d 100644 --- a/include/net/netns/conntrack.h +++ b/include/net/netns/conntrack.h @@ -70,6 +70,20 @@ struct nf_sctp_net { }; #endif +#ifdef CONFIG_NF_CT_PROTO_GRE +enum gre_conntrack { + GRE_CT_UNREPLIED, + GRE_CT_REPLIED, + GRE_CT_MAX +}; + +struct nf_gre_net { + struct nf_proto_net nf; + struct list_head keymap_list; + unsigned int timeouts[GRE_CT_MAX]; +}; +#endif + struct nf_ip_net { struct nf_generic_net generic; struct nf_tcp_net tcp; @@ -82,6 +96,9 @@ struct nf_ip_net { #ifdef CONFIG_NF_CT_PROTO_SCTP struct nf_sctp_net sctp; #endif +#ifdef CONFIG_NF_CT_PROTO_GRE + struct nf_gre_net gre; +#endif }; struct ct_pcpu { diff --git a/net/netfilter/Kconfig b/net/netfilter/Kconfig index beb3a69ce1d4..fefd63a243f2 100644 --- a/net/netfilter/Kconfig +++ b/net/netfilter/Kconfig @@ -174,7 +174,7 @@ config NF_CT_PROTO_DCCP If unsure, say Y. config NF_CT_PROTO_GRE - tristate + bool config NF_CT_PROTO_SCTP bool 'SCTP protocol connection tracking support' diff --git a/net/netfilter/Makefile b/net/netfilter/Makefile index 1ae65a314d7a..e66067befa42 100644 --- a/net/netfilter/Makefile +++ b/net/netfilter/Makefile @@ -13,6 +13,7 @@ nf_conntrack-$(CONFIG_NF_CONNTRACK_EVENTS) += nf_conntrack_ecache.o nf_conntrack-$(CONFIG_NF_CONNTRACK_LABELS) += nf_conntrack_labels.o nf_conntrack-$(CONFIG_NF_CT_PROTO_DCCP) += nf_conntrack_proto_dccp.o nf_conntrack-$(CONFIG_NF_CT_PROTO_SCTP) += nf_conntrack_proto_sctp.o +nf_conntrack-$(CONFIG_NF_CT_PROTO_GRE) += nf_conntrack_proto_gre.o obj-$(CONFIG_NETFILTER) = netfilter.o @@ -25,8 +26,6 @@ obj-$(CONFIG_NETFILTER_NETLINK_OSF) += nfnetlink_osf.o # connection tracking obj-$(CONFIG_NF_CONNTRACK) += nf_conntrack.o -obj-$(CONFIG_NF_CT_PROTO_GRE) += nf_conntrack_proto_gre.o - # netlink interface for nf_conntrack obj-$(CONFIG_NF_CT_NETLINK) += nf_conntrack_netlink.o obj-$(CONFIG_NF_CT_NETLINK_TIMEOUT) += nfnetlink_cttimeout.o diff --git a/net/netfilter/nf_conntrack_proto.c b/net/netfilter/nf_conntrack_proto.c index 2bbc32d939e4..e113bb2dc88d 100644 --- a/net/netfilter/nf_conntrack_proto.c +++ b/net/netfilter/nf_conntrack_proto.c @@ -817,6 +817,9 @@ static const struct nf_conntrack_l4proto * const builtin_l4proto[] = { #ifdef CONFIG_NF_CT_PROTO_UDPLITE &nf_conntrack_l4proto_udplite, #endif +#ifdef CONFIG_NF_CT_PROTO_GRE + &nf_conntrack_l4proto_gre, +#endif #if IS_ENABLED(CONFIG_IPV6) &nf_conntrack_l4proto_icmpv6, #endif /* CONFIG_IPV6 */ @@ -897,9 +900,11 @@ void nf_conntrack_proto_pernet_fini(struct net *net) ARRAY_SIZE(builtin_l4proto)); pn->users--; nf_ct_l4proto_unregister_sysctl(pn); +#ifdef CONFIG_NF_CT_PROTO_GRE + nf_ct_gre_keymap_flush(net); +#endif } - module_param_call(hashsize, nf_conntrack_set_hashsize, param_get_uint, &nf_conntrack_htable_size, 0600); diff --git a/net/netfilter/nf_conntrack_proto_gre.c b/net/netfilter/nf_conntrack_proto_gre.c index 34dd89485be2..68f9bfb79c4e 100644 --- a/net/netfilter/nf_conntrack_proto_gre.c +++ b/net/netfilter/nf_conntrack_proto_gre.c @@ -48,18 +48,17 @@ static const unsigned int gre_timeouts[GRE_CT_MAX] = { [GRE_CT_REPLIED] = 180*HZ, }; -static unsigned int proto_gre_net_id __read_mostly; /* used when expectation is added */ static DEFINE_SPINLOCK(keymap_lock); -static inline struct netns_proto_gre *gre_pernet(struct net *net) +static inline struct nf_gre_net *gre_pernet(struct net *net) { - return net_generic(net, proto_gre_net_id); + return &net->ct.nf_ct_proto.gre; } -static void nf_ct_gre_keymap_flush(struct net *net) +void nf_ct_gre_keymap_flush(struct net *net) { - struct netns_proto_gre *net_gre = gre_pernet(net); + struct nf_gre_net *net_gre = gre_pernet(net); struct nf_ct_gre_keymap *km, *tmp; spin_lock_bh(&keymap_lock); @@ -83,7 +82,7 @@ static inline int gre_key_cmpfn(const struct nf_ct_gre_keymap *km, /* look up the source key for a given tuple */ static __be16 gre_keymap_lookup(struct net *net, struct nf_conntrack_tuple *t) { - struct netns_proto_gre *net_gre = gre_pernet(net); + struct nf_gre_net *net_gre = gre_pernet(net); struct nf_ct_gre_keymap *km; __be16 key = 0; @@ -105,7 +104,7 @@ int nf_ct_gre_keymap_add(struct nf_conn *ct, enum ip_conntrack_dir dir, struct nf_conntrack_tuple *t) { struct net *net = nf_ct_net(ct); - struct netns_proto_gre *net_gre = gre_pernet(net); + struct nf_gre_net *net_gre = gre_pernet(net); struct nf_ct_pptp_master *ct_pptp_info = nfct_help_data(ct); struct nf_ct_gre_keymap **kmp, *km; @@ -210,7 +209,7 @@ static void gre_print_conntrack(struct seq_file *s, struct nf_conn *ct) static unsigned int *gre_get_timeouts(struct net *net) { - return gre_pernet(net)->gre_timeouts; + return gre_pernet(net)->timeouts; } /* Returns verdict for packet, and may modify conntrack */ @@ -272,13 +271,13 @@ static int gre_timeout_nlattr_to_obj(struct nlattr *tb[], struct net *net, void *data) { unsigned int *timeouts = data; - struct netns_proto_gre *net_gre = gre_pernet(net); + struct nf_gre_net *net_gre = gre_pernet(net); if (!timeouts) timeouts = gre_get_timeouts(net); /* set default timeouts for GRE. */ - timeouts[GRE_CT_UNREPLIED] = net_gre->gre_timeouts[GRE_CT_UNREPLIED]; - timeouts[GRE_CT_REPLIED] = net_gre->gre_timeouts[GRE_CT_REPLIED]; + timeouts[GRE_CT_UNREPLIED] = net_gre->timeouts[GRE_CT_UNREPLIED]; + timeouts[GRE_CT_REPLIED] = net_gre->timeouts[GRE_CT_REPLIED]; if (tb[CTA_TIMEOUT_GRE_UNREPLIED]) { timeouts[GRE_CT_UNREPLIED] = @@ -332,10 +331,11 @@ static struct ctl_table gre_sysctl_table[] = { }; #endif -static int gre_kmemdup_sysctl_table(struct net *net, struct nf_proto_net *nf, - struct netns_proto_gre *net_gre) +static int gre_kmemdup_sysctl_table(struct net *net) { #ifdef CONFIG_SYSCTL + struct nf_gre_net *net_gre = gre_pernet(net); + struct nf_proto_net *nf = &net_gre->nf; int i; if (nf->ctl_table) @@ -348,26 +348,25 @@ static int gre_kmemdup_sysctl_table(struct net *net, struct nf_proto_net *nf, return -ENOMEM; for (i = 0; i < GRE_CT_MAX; i++) - nf->ctl_table[i].data = &net_gre->gre_timeouts[i]; + nf->ctl_table[i].data = &net_gre->timeouts[i]; #endif return 0; } static int gre_init_net(struct net *net) { - struct netns_proto_gre *net_gre = gre_pernet(net); - struct nf_proto_net *nf = &net_gre->nf; + struct nf_gre_net *net_gre = gre_pernet(net); int i; INIT_LIST_HEAD(&net_gre->keymap_list); for (i = 0; i < GRE_CT_MAX; i++) - net_gre->gre_timeouts[i] = gre_timeouts[i]; + net_gre->timeouts[i] = gre_timeouts[i]; - return gre_kmemdup_sysctl_table(net, nf, net_gre); + return gre_kmemdup_sysctl_table(net); } /* protocol helper struct */ -static const struct nf_conntrack_l4proto nf_conntrack_l4proto_gre4 = { +const struct nf_conntrack_l4proto nf_conntrack_l4proto_gre = { .l4proto = IPPROTO_GRE, .pkt_to_tuple = gre_pkt_to_tuple, #ifdef CONFIG_NF_CONNTRACK_PROCFS @@ -391,61 +390,5 @@ static const struct nf_conntrack_l4proto nf_conntrack_l4proto_gre4 = { .nla_policy = gre_timeout_nla_policy, }, #endif /* CONFIG_NF_CONNTRACK_TIMEOUT */ - .net_id = &proto_gre_net_id, .init_net = gre_init_net, }; - -static int proto_gre_net_init(struct net *net) -{ - int ret = 0; - - ret = nf_ct_l4proto_pernet_register_one(net, - &nf_conntrack_l4proto_gre4); - if (ret < 0) - pr_err("nf_conntrack_gre4: pernet registration failed.\n"); - return ret; -} - -static void proto_gre_net_exit(struct net *net) -{ - nf_ct_l4proto_pernet_unregister_one(net, &nf_conntrack_l4proto_gre4); - nf_ct_gre_keymap_flush(net); -} - -static struct pernet_operations proto_gre_net_ops = { - .init = proto_gre_net_init, - .exit = proto_gre_net_exit, - .id = &proto_gre_net_id, - .size = sizeof(struct netns_proto_gre), -}; - -static int __init nf_ct_proto_gre_init(void) -{ - int ret; - - BUILD_BUG_ON(offsetof(struct netns_proto_gre, nf) != 0); - - ret = register_pernet_subsys(&proto_gre_net_ops); - if (ret < 0) - goto out_pernet; - ret = nf_ct_l4proto_register_one(&nf_conntrack_l4proto_gre4); - if (ret < 0) - goto out_gre4; - - return 0; -out_gre4: - unregister_pernet_subsys(&proto_gre_net_ops); -out_pernet: - return ret; -} - -static void __exit nf_ct_proto_gre_fini(void) -{ - nf_ct_l4proto_unregister_one(&nf_conntrack_l4proto_gre4); - unregister_pernet_subsys(&proto_gre_net_ops); -} - -module_init(nf_ct_proto_gre_init); -module_exit(nf_ct_proto_gre_fini); - -MODULE_LICENSE("GPL"); diff --git a/net/netfilter/nfnetlink_cttimeout.c b/net/netfilter/nfnetlink_cttimeout.c index 109b0d27345a..0e3e1a018206 100644 --- a/net/netfilter/nfnetlink_cttimeout.c +++ b/net/netfilter/nfnetlink_cttimeout.c @@ -474,12 +474,7 @@ static int cttimeout_default_get(struct net *net, struct sock *ctnl, break; case IPPROTO_GRE: #ifdef CONFIG_NF_CT_PROTO_GRE - if (l4proto->net_id) { - struct netns_proto_gre *net_gre; - - net_gre = net_generic(net, *l4proto->net_id); - timeouts = net_gre->gre_timeouts; - } + timeouts = nf_gre_pernet(net)->timeouts; #endif break; case 255: