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 <fw@strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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202e651cd4
Коммит
22fc4c4c9f
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@ -22,23 +22,11 @@ struct nf_ct_gre_keymap {
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struct rcu_head rcu;
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};
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enum grep_conntrack {
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GRE_CT_UNREPLIED,
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GRE_CT_REPLIED,
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GRE_CT_MAX
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};
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struct netns_proto_gre {
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struct nf_proto_net nf;
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rwlock_t keymap_lock;
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struct list_head keymap_list;
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unsigned int gre_timeouts[GRE_CT_MAX];
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};
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/* add new tuple->key_reply pair to keymap */
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int nf_ct_gre_keymap_add(struct nf_conn *ct, enum ip_conntrack_dir dir,
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struct nf_conntrack_tuple *t);
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void nf_ct_gre_keymap_flush(struct net *net);
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/* delete keymap entries */
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void nf_ct_gre_keymap_destroy(struct nf_conn *ct);
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@ -22,5 +22,8 @@ extern const struct nf_conntrack_l4proto nf_conntrack_l4proto_sctp;
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#ifdef CONFIG_NF_CT_PROTO_UDPLITE
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extern const struct nf_conntrack_l4proto nf_conntrack_l4proto_udplite;
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#endif
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#ifdef CONFIG_NF_CT_PROTO_GRE
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extern const struct nf_conntrack_l4proto nf_conntrack_l4proto_gre;
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#endif
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#endif /*_NF_CONNTRACK_IPV4_H*/
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@ -239,4 +239,11 @@ static inline struct nf_sctp_net *nf_sctp_pernet(struct net *net)
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}
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#endif
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#ifdef CONFIG_NF_CT_PROTO_GRE
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static inline struct nf_gre_net *nf_gre_pernet(struct net *net)
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{
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return &net->ct.nf_ct_proto.gre;
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}
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#endif
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#endif /*_NF_CONNTRACK_PROTOCOL_H*/
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@ -70,6 +70,20 @@ struct nf_sctp_net {
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};
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#endif
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#ifdef CONFIG_NF_CT_PROTO_GRE
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enum gre_conntrack {
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GRE_CT_UNREPLIED,
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GRE_CT_REPLIED,
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GRE_CT_MAX
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};
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struct nf_gre_net {
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struct nf_proto_net nf;
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struct list_head keymap_list;
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unsigned int timeouts[GRE_CT_MAX];
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};
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#endif
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struct nf_ip_net {
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struct nf_generic_net generic;
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struct nf_tcp_net tcp;
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@ -82,6 +96,9 @@ struct nf_ip_net {
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#ifdef CONFIG_NF_CT_PROTO_SCTP
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struct nf_sctp_net sctp;
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#endif
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#ifdef CONFIG_NF_CT_PROTO_GRE
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struct nf_gre_net gre;
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#endif
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};
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struct ct_pcpu {
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@ -174,7 +174,7 @@ config NF_CT_PROTO_DCCP
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If unsure, say Y.
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config NF_CT_PROTO_GRE
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tristate
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bool
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config NF_CT_PROTO_SCTP
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bool 'SCTP protocol connection tracking support'
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@ -13,6 +13,7 @@ nf_conntrack-$(CONFIG_NF_CONNTRACK_EVENTS) += nf_conntrack_ecache.o
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nf_conntrack-$(CONFIG_NF_CONNTRACK_LABELS) += nf_conntrack_labels.o
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nf_conntrack-$(CONFIG_NF_CT_PROTO_DCCP) += nf_conntrack_proto_dccp.o
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nf_conntrack-$(CONFIG_NF_CT_PROTO_SCTP) += nf_conntrack_proto_sctp.o
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nf_conntrack-$(CONFIG_NF_CT_PROTO_GRE) += nf_conntrack_proto_gre.o
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obj-$(CONFIG_NETFILTER) = netfilter.o
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@ -25,8 +26,6 @@ obj-$(CONFIG_NETFILTER_NETLINK_OSF) += nfnetlink_osf.o
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# connection tracking
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obj-$(CONFIG_NF_CONNTRACK) += nf_conntrack.o
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obj-$(CONFIG_NF_CT_PROTO_GRE) += nf_conntrack_proto_gre.o
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# netlink interface for nf_conntrack
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obj-$(CONFIG_NF_CT_NETLINK) += nf_conntrack_netlink.o
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obj-$(CONFIG_NF_CT_NETLINK_TIMEOUT) += nfnetlink_cttimeout.o
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@ -817,6 +817,9 @@ static const struct nf_conntrack_l4proto * const builtin_l4proto[] = {
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#ifdef CONFIG_NF_CT_PROTO_UDPLITE
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&nf_conntrack_l4proto_udplite,
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#endif
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#ifdef CONFIG_NF_CT_PROTO_GRE
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&nf_conntrack_l4proto_gre,
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#endif
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#if IS_ENABLED(CONFIG_IPV6)
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&nf_conntrack_l4proto_icmpv6,
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#endif /* CONFIG_IPV6 */
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@ -897,9 +900,11 @@ void nf_conntrack_proto_pernet_fini(struct net *net)
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ARRAY_SIZE(builtin_l4proto));
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pn->users--;
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nf_ct_l4proto_unregister_sysctl(pn);
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#ifdef CONFIG_NF_CT_PROTO_GRE
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nf_ct_gre_keymap_flush(net);
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#endif
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}
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module_param_call(hashsize, nf_conntrack_set_hashsize, param_get_uint,
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&nf_conntrack_htable_size, 0600);
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@ -48,18 +48,17 @@ static const unsigned int gre_timeouts[GRE_CT_MAX] = {
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[GRE_CT_REPLIED] = 180*HZ,
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};
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static unsigned int proto_gre_net_id __read_mostly;
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/* used when expectation is added */
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static DEFINE_SPINLOCK(keymap_lock);
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static inline struct netns_proto_gre *gre_pernet(struct net *net)
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static inline struct nf_gre_net *gre_pernet(struct net *net)
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{
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return net_generic(net, proto_gre_net_id);
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return &net->ct.nf_ct_proto.gre;
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}
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static void nf_ct_gre_keymap_flush(struct net *net)
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void nf_ct_gre_keymap_flush(struct net *net)
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{
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struct netns_proto_gre *net_gre = gre_pernet(net);
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struct nf_gre_net *net_gre = gre_pernet(net);
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struct nf_ct_gre_keymap *km, *tmp;
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spin_lock_bh(&keymap_lock);
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@ -83,7 +82,7 @@ static inline int gre_key_cmpfn(const struct nf_ct_gre_keymap *km,
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/* look up the source key for a given tuple */
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static __be16 gre_keymap_lookup(struct net *net, struct nf_conntrack_tuple *t)
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{
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struct netns_proto_gre *net_gre = gre_pernet(net);
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struct nf_gre_net *net_gre = gre_pernet(net);
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struct nf_ct_gre_keymap *km;
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__be16 key = 0;
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@ -105,7 +104,7 @@ int nf_ct_gre_keymap_add(struct nf_conn *ct, enum ip_conntrack_dir dir,
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struct nf_conntrack_tuple *t)
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{
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struct net *net = nf_ct_net(ct);
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struct netns_proto_gre *net_gre = gre_pernet(net);
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struct nf_gre_net *net_gre = gre_pernet(net);
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struct nf_ct_pptp_master *ct_pptp_info = nfct_help_data(ct);
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struct nf_ct_gre_keymap **kmp, *km;
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@ -210,7 +209,7 @@ static void gre_print_conntrack(struct seq_file *s, struct nf_conn *ct)
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static unsigned int *gre_get_timeouts(struct net *net)
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{
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return gre_pernet(net)->gre_timeouts;
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return gre_pernet(net)->timeouts;
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}
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/* Returns verdict for packet, and may modify conntrack */
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@ -272,13 +271,13 @@ static int gre_timeout_nlattr_to_obj(struct nlattr *tb[],
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struct net *net, void *data)
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{
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unsigned int *timeouts = data;
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struct netns_proto_gre *net_gre = gre_pernet(net);
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struct nf_gre_net *net_gre = gre_pernet(net);
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if (!timeouts)
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timeouts = gre_get_timeouts(net);
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/* set default timeouts for GRE. */
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timeouts[GRE_CT_UNREPLIED] = net_gre->gre_timeouts[GRE_CT_UNREPLIED];
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timeouts[GRE_CT_REPLIED] = net_gre->gre_timeouts[GRE_CT_REPLIED];
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timeouts[GRE_CT_UNREPLIED] = net_gre->timeouts[GRE_CT_UNREPLIED];
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timeouts[GRE_CT_REPLIED] = net_gre->timeouts[GRE_CT_REPLIED];
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if (tb[CTA_TIMEOUT_GRE_UNREPLIED]) {
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timeouts[GRE_CT_UNREPLIED] =
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@ -332,10 +331,11 @@ static struct ctl_table gre_sysctl_table[] = {
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};
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#endif
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static int gre_kmemdup_sysctl_table(struct net *net, struct nf_proto_net *nf,
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struct netns_proto_gre *net_gre)
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static int gre_kmemdup_sysctl_table(struct net *net)
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{
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#ifdef CONFIG_SYSCTL
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struct nf_gre_net *net_gre = gre_pernet(net);
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struct nf_proto_net *nf = &net_gre->nf;
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int i;
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if (nf->ctl_table)
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@ -348,26 +348,25 @@ static int gre_kmemdup_sysctl_table(struct net *net, struct nf_proto_net *nf,
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return -ENOMEM;
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for (i = 0; i < GRE_CT_MAX; i++)
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nf->ctl_table[i].data = &net_gre->gre_timeouts[i];
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nf->ctl_table[i].data = &net_gre->timeouts[i];
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#endif
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return 0;
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}
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static int gre_init_net(struct net *net)
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{
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struct netns_proto_gre *net_gre = gre_pernet(net);
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struct nf_proto_net *nf = &net_gre->nf;
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struct nf_gre_net *net_gre = gre_pernet(net);
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int i;
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INIT_LIST_HEAD(&net_gre->keymap_list);
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for (i = 0; i < GRE_CT_MAX; i++)
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net_gre->gre_timeouts[i] = gre_timeouts[i];
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net_gre->timeouts[i] = gre_timeouts[i];
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return gre_kmemdup_sysctl_table(net, nf, net_gre);
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return gre_kmemdup_sysctl_table(net);
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}
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/* protocol helper struct */
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static const struct nf_conntrack_l4proto nf_conntrack_l4proto_gre4 = {
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const struct nf_conntrack_l4proto nf_conntrack_l4proto_gre = {
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.l4proto = IPPROTO_GRE,
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.pkt_to_tuple = gre_pkt_to_tuple,
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#ifdef CONFIG_NF_CONNTRACK_PROCFS
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.nla_policy = gre_timeout_nla_policy,
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},
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#endif /* CONFIG_NF_CONNTRACK_TIMEOUT */
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.net_id = &proto_gre_net_id,
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.init_net = gre_init_net,
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};
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static int proto_gre_net_init(struct net *net)
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{
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int ret = 0;
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ret = nf_ct_l4proto_pernet_register_one(net,
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&nf_conntrack_l4proto_gre4);
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if (ret < 0)
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pr_err("nf_conntrack_gre4: pernet registration failed.\n");
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return ret;
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}
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static void proto_gre_net_exit(struct net *net)
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{
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nf_ct_l4proto_pernet_unregister_one(net, &nf_conntrack_l4proto_gre4);
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nf_ct_gre_keymap_flush(net);
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}
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static struct pernet_operations proto_gre_net_ops = {
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.init = proto_gre_net_init,
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.exit = proto_gre_net_exit,
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.id = &proto_gre_net_id,
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.size = sizeof(struct netns_proto_gre),
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};
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static int __init nf_ct_proto_gre_init(void)
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{
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int ret;
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BUILD_BUG_ON(offsetof(struct netns_proto_gre, nf) != 0);
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ret = register_pernet_subsys(&proto_gre_net_ops);
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if (ret < 0)
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goto out_pernet;
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ret = nf_ct_l4proto_register_one(&nf_conntrack_l4proto_gre4);
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if (ret < 0)
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goto out_gre4;
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return 0;
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out_gre4:
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unregister_pernet_subsys(&proto_gre_net_ops);
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out_pernet:
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return ret;
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}
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static void __exit nf_ct_proto_gre_fini(void)
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{
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nf_ct_l4proto_unregister_one(&nf_conntrack_l4proto_gre4);
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unregister_pernet_subsys(&proto_gre_net_ops);
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}
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module_init(nf_ct_proto_gre_init);
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module_exit(nf_ct_proto_gre_fini);
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MODULE_LICENSE("GPL");
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@ -474,12 +474,7 @@ static int cttimeout_default_get(struct net *net, struct sock *ctnl,
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break;
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case IPPROTO_GRE:
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#ifdef CONFIG_NF_CT_PROTO_GRE
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if (l4proto->net_id) {
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struct netns_proto_gre *net_gre;
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net_gre = net_generic(net, *l4proto->net_id);
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timeouts = net_gre->gre_timeouts;
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}
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timeouts = nf_gre_pernet(net)->timeouts;
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#endif
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break;
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case 255:
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