From 7266507d89991fa1e989283e4e032c6d9357fe26 Mon Sep 17 00:00:00 2001 From: Kevin Cernekee Date: Mon, 17 Dec 2012 18:33:58 +0000 Subject: netfilter: nf_ct_sip: support Cisco 7941/7945 IP phones Most SIP devices use a source port of 5060/udp on SIP requests, so the response automatically comes back to port 5060: phone_ip:5060 -> proxy_ip:5060 REGISTER proxy_ip:5060 -> phone_ip:5060 100 Trying The newer Cisco IP phones, however, use a randomly chosen high source port for the SIP request but expect the response on port 5060: phone_ip:49173 -> proxy_ip:5060 REGISTER proxy_ip:5060 -> phone_ip:5060 100 Trying Standard Linux NAT, with or without nf_nat_sip, will send the reply back to port 49173, not 5060: phone_ip:49173 -> proxy_ip:5060 REGISTER proxy_ip:5060 -> phone_ip:49173 100 Trying But the phone is not listening on 49173, so it will never see the reply. This patch modifies nf_*_sip to work around this quirk by extracting the SIP response port from the Via: header, iff the source IP in the packet header matches the source IP in the SIP request. Signed-off-by: Kevin Cernekee Acked-by: Eric Dumazet Cc: Patrick McHardy Signed-off-by: Pablo Neira Ayuso diff --git a/include/linux/netfilter/nf_conntrack_sip.h b/include/linux/netfilter/nf_conntrack_sip.h index 387bdd0..ba7f571 100644 --- a/include/linux/netfilter/nf_conntrack_sip.h +++ b/include/linux/netfilter/nf_conntrack_sip.h @@ -4,12 +4,15 @@ #include +#include + #define SIP_PORT 5060 #define SIP_TIMEOUT 3600 struct nf_ct_sip_master { unsigned int register_cseq; unsigned int invite_cseq; + __be16 forced_dport; }; enum sip_expectation_classes { diff --git a/net/netfilter/nf_conntrack_sip.c b/net/netfilter/nf_conntrack_sip.c index df8f4f2..72a67bb 100644 --- a/net/netfilter/nf_conntrack_sip.c +++ b/net/netfilter/nf_conntrack_sip.c @@ -1440,8 +1440,25 @@ static int process_sip_request(struct sk_buff *skb, unsigned int protoff, { enum ip_conntrack_info ctinfo; struct nf_conn *ct = nf_ct_get(skb, &ctinfo); + struct nf_ct_sip_master *ct_sip_info = nfct_help_data(ct); + enum ip_conntrack_dir dir = CTINFO2DIR(ctinfo); unsigned int matchoff, matchlen; unsigned int cseq, i; + union nf_inet_addr addr; + __be16 port; + + /* Many Cisco IP phones use a high source port for SIP requests, but + * listen for the response on port 5060. If we are the local + * router for one of these phones, save the port number from the + * Via: header so that nf_nat_sip can redirect the responses to + * the correct port. + */ + if (ct_sip_parse_header_uri(ct, *dptr, NULL, *datalen, + SIP_HDR_VIA_UDP, NULL, &matchoff, + &matchlen, &addr, &port) > 0 && + port != ct->tuplehash[dir].tuple.src.u.udp.port && + nf_inet_addr_cmp(&addr, &ct->tuplehash[dir].tuple.src.u3)) + ct_sip_info->forced_dport = port; for (i = 0; i < ARRAY_SIZE(sip_handlers); i++) { const struct sip_handler *handler; diff --git a/net/netfilter/nf_nat_sip.c b/net/netfilter/nf_nat_sip.c index 16303c7..5951146e 100644 --- a/net/netfilter/nf_nat_sip.c +++ b/net/netfilter/nf_nat_sip.c @@ -95,6 +95,7 @@ static int map_addr(struct sk_buff *skb, unsigned int protoff, enum ip_conntrack_info ctinfo; struct nf_conn *ct = nf_ct_get(skb, &ctinfo); enum ip_conntrack_dir dir = CTINFO2DIR(ctinfo); + struct nf_ct_sip_master *ct_sip_info = nfct_help_data(ct); char buffer[INET6_ADDRSTRLEN + sizeof("[]:nnnnn")]; unsigned int buflen; union nf_inet_addr newaddr; @@ -107,7 +108,8 @@ static int map_addr(struct sk_buff *skb, unsigned int protoff, } else if (nf_inet_addr_cmp(&ct->tuplehash[dir].tuple.dst.u3, addr) && ct->tuplehash[dir].tuple.dst.u.udp.port == port) { newaddr = ct->tuplehash[!dir].tuple.src.u3; - newport = ct->tuplehash[!dir].tuple.src.u.udp.port; + newport = ct_sip_info->forced_dport ? : + ct->tuplehash[!dir].tuple.src.u.udp.port; } else return 1; @@ -144,6 +146,7 @@ static unsigned int nf_nat_sip(struct sk_buff *skb, unsigned int protoff, enum ip_conntrack_info ctinfo; struct nf_conn *ct = nf_ct_get(skb, &ctinfo); enum ip_conntrack_dir dir = CTINFO2DIR(ctinfo); + struct nf_ct_sip_master *ct_sip_info = nfct_help_data(ct); unsigned int coff, matchoff, matchlen; enum sip_header_types hdr; union nf_inet_addr addr; @@ -258,6 +261,21 @@ next: !map_sip_addr(skb, protoff, dataoff, dptr, datalen, SIP_HDR_TO)) return NF_DROP; + /* Mangle destination port for Cisco phones, then fix up checksums */ + if (dir == IP_CT_DIR_REPLY && ct_sip_info->forced_dport) { + struct udphdr *uh; + + if (!skb_make_writable(skb, skb->len)) + return NF_DROP; + + uh = (void *)skb->data + protoff; + uh->dest = ct_sip_info->forced_dport; + + if (!nf_nat_mangle_udp_packet(skb, ct, ctinfo, protoff, + 0, 0, NULL, 0)) + return NF_DROP; + } + return NF_ACCEPT; } @@ -311,8 +329,10 @@ static unsigned int nf_nat_sip_expect(struct sk_buff *skb, unsigned int protoff, enum ip_conntrack_info ctinfo; struct nf_conn *ct = nf_ct_get(skb, &ctinfo); enum ip_conntrack_dir dir = CTINFO2DIR(ctinfo); + struct nf_ct_sip_master *ct_sip_info = nfct_help_data(ct); union nf_inet_addr newaddr; u_int16_t port; + __be16 srcport; char buffer[INET6_ADDRSTRLEN + sizeof("[]:nnnnn")]; unsigned int buflen; @@ -326,8 +346,9 @@ static unsigned int nf_nat_sip_expect(struct sk_buff *skb, unsigned int protoff, /* If the signalling port matches the connection's source port in the * original direction, try to use the destination port in the opposite * direction. */ - if (exp->tuple.dst.u.udp.port == - ct->tuplehash[dir].tuple.src.u.udp.port) + srcport = ct_sip_info->forced_dport ? : + ct->tuplehash[dir].tuple.src.u.udp.port; + if (exp->tuple.dst.u.udp.port == srcport) port = ntohs(ct->tuplehash[!dir].tuple.dst.u.udp.port); else port = ntohs(exp->tuple.dst.u.udp.port); -- cgit v0.10.2 From c539f01717c239cfa0921dd43927afc976f1eedc Mon Sep 17 00:00:00 2001 From: Florian Westphal Date: Fri, 11 Jan 2013 06:30:44 +0000 Subject: netfilter: add connlabel conntrack extension similar to connmarks, except labels are bit-based; i.e. all labels may be attached to a flow at the same time. Up to 128 labels are supported. Supporting more labels is possible, but requires increasing the ct offset delta from u8 to u16 type due to increased extension sizes. Mapping of bit-identifier to label name is done in userspace. The extension is enabled at run-time once "-m connlabel" netfilter rules are added. Signed-off-by: Florian Westphal Signed-off-by: Pablo Neira Ayuso diff --git a/include/net/netfilter/nf_conntrack_extend.h b/include/net/netfilter/nf_conntrack_extend.h index 8b4d1fc2..977bc8a 100644 --- a/include/net/netfilter/nf_conntrack_extend.h +++ b/include/net/netfilter/nf_conntrack_extend.h @@ -23,6 +23,9 @@ enum nf_ct_ext_id { #ifdef CONFIG_NF_CONNTRACK_TIMEOUT NF_CT_EXT_TIMEOUT, #endif +#ifdef CONFIG_NF_CONNTRACK_LABELS + NF_CT_EXT_LABELS, +#endif NF_CT_EXT_NUM, }; @@ -33,6 +36,7 @@ enum nf_ct_ext_id { #define NF_CT_EXT_ZONE_TYPE struct nf_conntrack_zone #define NF_CT_EXT_TSTAMP_TYPE struct nf_conn_tstamp #define NF_CT_EXT_TIMEOUT_TYPE struct nf_conn_timeout +#define NF_CT_EXT_LABELS_TYPE struct nf_conn_labels /* Extensions: optional stuff which isn't permanently in struct. */ struct nf_ct_ext { diff --git a/include/net/netfilter/nf_conntrack_labels.h b/include/net/netfilter/nf_conntrack_labels.h new file mode 100644 index 0000000..b94fe31 --- /dev/null +++ b/include/net/netfilter/nf_conntrack_labels.h @@ -0,0 +1,55 @@ +#include +#include +#include +#include +#include +#include + +#include + +struct nf_conn_labels { + u8 words; + unsigned long bits[]; +}; + +static inline struct nf_conn_labels *nf_ct_labels_find(const struct nf_conn *ct) +{ +#ifdef CONFIG_NF_CONNTRACK_LABELS + return nf_ct_ext_find(ct, NF_CT_EXT_LABELS); +#else + return NULL; +#endif +} + +static inline struct nf_conn_labels *nf_ct_labels_ext_add(struct nf_conn *ct) +{ +#ifdef CONFIG_NF_CONNTRACK_LABELS + struct nf_conn_labels *cl_ext; + struct net *net = nf_ct_net(ct); + u8 words; + + words = ACCESS_ONCE(net->ct.label_words); + if (words == 0 || WARN_ON_ONCE(words > 8)) + return NULL; + + cl_ext = nf_ct_ext_add_length(ct, NF_CT_EXT_LABELS, + words * sizeof(long), GFP_ATOMIC); + if (cl_ext != NULL) + cl_ext->words = words; + + return cl_ext; +#else + return NULL; +#endif +} + +bool nf_connlabel_match(const struct nf_conn *ct, u16 bit); +int nf_connlabel_set(struct nf_conn *ct, u16 bit); + +#ifdef CONFIG_NF_CONNTRACK_LABELS +int nf_conntrack_labels_init(struct net *net); +void nf_conntrack_labels_fini(struct net *net); +#else +static inline int nf_conntrack_labels_init(struct net *n) { return 0; } +static inline void nf_conntrack_labels_fini(struct net *net) {} +#endif diff --git a/include/net/netns/conntrack.h b/include/net/netns/conntrack.h index 923cb20..c9c0c53 100644 --- a/include/net/netns/conntrack.h +++ b/include/net/netns/conntrack.h @@ -84,6 +84,10 @@ struct netns_ct { int sysctl_auto_assign_helper; bool auto_assign_helper_warned; struct nf_ip_net nf_ct_proto; +#if defined(CONFIG_NF_CONNTRACK_LABELS) + unsigned int labels_used; + u8 label_words; +#endif #ifdef CONFIG_NF_NAT_NEEDED struct hlist_head *nat_bysource; unsigned int nat_htable_size; diff --git a/include/uapi/linux/netfilter/xt_connlabel.h b/include/uapi/linux/netfilter/xt_connlabel.h new file mode 100644 index 0000000..c4bc9ee --- /dev/null +++ b/include/uapi/linux/netfilter/xt_connlabel.h @@ -0,0 +1,12 @@ +#include + +#define XT_CONNLABEL_MAXBIT 127 +enum xt_connlabel_mtopts { + XT_CONNLABEL_OP_INVERT = 1 << 0, + XT_CONNLABEL_OP_SET = 1 << 1, +}; + +struct xt_connlabel_mtinfo { + __u16 bit; + __u16 options; +}; diff --git a/net/netfilter/Kconfig b/net/netfilter/Kconfig index 49e96df..bb48607 100644 --- a/net/netfilter/Kconfig +++ b/net/netfilter/Kconfig @@ -124,6 +124,12 @@ config NF_CONNTRACK_TIMESTAMP If unsure, say `N'. +config NF_CONNTRACK_LABELS + bool + help + This option enables support for assigning user-defined flag bits + to connection tracking entries. It selected by the connlabel match. + config NF_CT_PROTO_DCCP tristate 'DCCP protocol connection tracking support (EXPERIMENTAL)' depends on EXPERIMENTAL @@ -842,6 +848,18 @@ config NETFILTER_XT_MATCH_CONNBYTES If you want to compile it as a module, say M here and read . If unsure, say `N'. +config NETFILTER_XT_MATCH_CONNLABEL + tristate '"connlabel" match support' + select NF_CONNTRACK_LABELS + depends on NETFILTER_ADVANCED + ---help--- + This match allows you to test and assign userspace-defined labels names + to a connection. The kernel only stores bit values - mapping + names to bits is done by userspace. + + Unlike connmark, more than 32 flag bits may be assigned to a + connection simultaneously. + config NETFILTER_XT_MATCH_CONNLIMIT tristate '"connlimit" match support"' depends on NF_CONNTRACK diff --git a/net/netfilter/Makefile b/net/netfilter/Makefile index 3259697..b3bbda6 100644 --- a/net/netfilter/Makefile +++ b/net/netfilter/Makefile @@ -4,6 +4,7 @@ nf_conntrack-y := nf_conntrack_core.o nf_conntrack_standalone.o nf_conntrack_exp nf_conntrack-$(CONFIG_NF_CONNTRACK_TIMEOUT) += nf_conntrack_timeout.o nf_conntrack-$(CONFIG_NF_CONNTRACK_TIMESTAMP) += nf_conntrack_timestamp.o nf_conntrack-$(CONFIG_NF_CONNTRACK_EVENTS) += nf_conntrack_ecache.o +nf_conntrack-$(CONFIG_NF_CONNTRACK_LABELS) += nf_conntrack_labels.o obj-$(CONFIG_NETFILTER) = netfilter.o @@ -101,6 +102,7 @@ obj-$(CONFIG_NETFILTER_XT_MATCH_ADDRTYPE) += xt_addrtype.o obj-$(CONFIG_NETFILTER_XT_MATCH_CLUSTER) += xt_cluster.o obj-$(CONFIG_NETFILTER_XT_MATCH_COMMENT) += xt_comment.o obj-$(CONFIG_NETFILTER_XT_MATCH_CONNBYTES) += xt_connbytes.o +obj-$(CONFIG_NETFILTER_XT_MATCH_CONNLABEL) += xt_connlabel.o obj-$(CONFIG_NETFILTER_XT_MATCH_CONNLIMIT) += xt_connlimit.o obj-$(CONFIG_NETFILTER_XT_MATCH_CONNTRACK) += xt_conntrack.o obj-$(CONFIG_NETFILTER_XT_MATCH_CPU) += xt_cpu.o diff --git a/net/netfilter/nf_conntrack_core.c b/net/netfilter/nf_conntrack_core.c index e4a0c4f..85aa4b7 100644 --- a/net/netfilter/nf_conntrack_core.c +++ b/net/netfilter/nf_conntrack_core.c @@ -45,6 +45,7 @@ #include #include #include +#include #include #include @@ -763,6 +764,7 @@ void nf_conntrack_free(struct nf_conn *ct) } EXPORT_SYMBOL_GPL(nf_conntrack_free); + /* Allocate a new conntrack: we return -ENOMEM if classification failed due to stress. Otherwise it really is unclassifiable. */ static struct nf_conntrack_tuple_hash * @@ -809,6 +811,7 @@ init_conntrack(struct net *net, struct nf_conn *tmpl, nf_ct_acct_ext_add(ct, GFP_ATOMIC); nf_ct_tstamp_ext_add(ct, GFP_ATOMIC); + nf_ct_labels_ext_add(ct); ecache = tmpl ? nf_ct_ecache_find(tmpl) : NULL; nf_ct_ecache_ext_add(ct, ecache ? ecache->ctmask : 0, @@ -1352,6 +1355,7 @@ static void nf_conntrack_cleanup_net(struct net *net) } nf_ct_free_hashtable(net->ct.hash, net->ct.htable_size); + nf_conntrack_labels_fini(net); nf_conntrack_helper_fini(net); nf_conntrack_timeout_fini(net); nf_conntrack_ecache_fini(net); @@ -1583,7 +1587,15 @@ static int nf_conntrack_init_net(struct net *net) ret = nf_conntrack_helper_init(net); if (ret < 0) goto err_helper; + + ret = nf_conntrack_labels_init(net); + if (ret < 0) + goto err_labels; + return 0; + +err_labels: + nf_conntrack_helper_fini(net); err_helper: nf_conntrack_timeout_fini(net); err_timeout: diff --git a/net/netfilter/nf_conntrack_labels.c b/net/netfilter/nf_conntrack_labels.c new file mode 100644 index 0000000..0c542f4 --- /dev/null +++ b/net/netfilter/nf_conntrack_labels.c @@ -0,0 +1,72 @@ +/* + * test/set flag bits stored in conntrack extension area. + * + * (C) 2013 Astaro GmbH & Co KG + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include +#include +#include +#include +#include +#include + +#include +#include + +static unsigned int label_bits(const struct nf_conn_labels *l) +{ + unsigned int longs = l->words; + return longs * BITS_PER_LONG; +} + +bool nf_connlabel_match(const struct nf_conn *ct, u16 bit) +{ + struct nf_conn_labels *labels = nf_ct_labels_find(ct); + + if (!labels) + return false; + + return bit < label_bits(labels) && test_bit(bit, labels->bits); +} +EXPORT_SYMBOL_GPL(nf_connlabel_match); + +int nf_connlabel_set(struct nf_conn *ct, u16 bit) +{ + struct nf_conn_labels *labels = nf_ct_labels_find(ct); + + if (!labels || bit >= label_bits(labels)) + return -ENOSPC; + + if (test_bit(bit, labels->bits)) + return 0; + + if (test_and_set_bit(bit, labels->bits)) + return 0; + + return 0; +} +EXPORT_SYMBOL_GPL(nf_connlabel_set); + +static struct nf_ct_ext_type labels_extend __read_mostly = { + .len = sizeof(struct nf_conn_labels), + .align = __alignof__(struct nf_conn_labels), + .id = NF_CT_EXT_LABELS, +}; + +int nf_conntrack_labels_init(struct net *net) +{ + if (net_eq(net, &init_net)) + return nf_ct_extend_register(&labels_extend); + return 0; +} + +void nf_conntrack_labels_fini(struct net *net) +{ + if (net_eq(net, &init_net)) + nf_ct_extend_unregister(&labels_extend); +} diff --git a/net/netfilter/nf_conntrack_netlink.c b/net/netfilter/nf_conntrack_netlink.c index 627b0e5..e0b10ee 100644 --- a/net/netfilter/nf_conntrack_netlink.c +++ b/net/netfilter/nf_conntrack_netlink.c @@ -43,6 +43,7 @@ #include #include #include +#include #ifdef CONFIG_NF_NAT_NEEDED #include #include @@ -1598,6 +1599,8 @@ ctnetlink_create_conntrack(struct net *net, u16 zone, nf_ct_acct_ext_add(ct, GFP_ATOMIC); nf_ct_tstamp_ext_add(ct, GFP_ATOMIC); nf_ct_ecache_ext_add(ct, 0, 0, GFP_ATOMIC); + nf_ct_labels_ext_add(ct); + /* we must add conntrack extensions before confirmation. */ ct->status |= IPS_CONFIRMED; diff --git a/net/netfilter/xt_connlabel.c b/net/netfilter/xt_connlabel.c new file mode 100644 index 0000000..9f8719d --- /dev/null +++ b/net/netfilter/xt_connlabel.c @@ -0,0 +1,99 @@ +/* + * (C) 2013 Astaro GmbH & Co KG + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include +#include +#include +#include +#include + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Florian Westphal "); +MODULE_DESCRIPTION("Xtables: add/match connection trackling labels"); +MODULE_ALIAS("ipt_connlabel"); +MODULE_ALIAS("ip6t_connlabel"); + +static bool +connlabel_mt(const struct sk_buff *skb, struct xt_action_param *par) +{ + const struct xt_connlabel_mtinfo *info = par->matchinfo; + enum ip_conntrack_info ctinfo; + struct nf_conn *ct; + bool invert = info->options & XT_CONNLABEL_OP_INVERT; + + ct = nf_ct_get(skb, &ctinfo); + if (ct == NULL || nf_ct_is_untracked(ct)) + return invert; + + if (info->options & XT_CONNLABEL_OP_SET) + return (nf_connlabel_set(ct, info->bit) == 0) ^ invert; + + return nf_connlabel_match(ct, info->bit) ^ invert; +} + +static int connlabel_mt_check(const struct xt_mtchk_param *par) +{ + const int options = XT_CONNLABEL_OP_INVERT | + XT_CONNLABEL_OP_SET; + struct xt_connlabel_mtinfo *info = par->matchinfo; + int ret; + size_t words; + + if (info->bit > XT_CONNLABEL_MAXBIT) + return -ERANGE; + + if (info->options & ~options) { + pr_err("Unknown options in mask %x\n", info->options); + return -EINVAL; + } + + ret = nf_ct_l3proto_try_module_get(par->family); + if (ret < 0) { + pr_info("cannot load conntrack support for proto=%u\n", + par->family); + return ret; + } + + par->net->ct.labels_used++; + words = BITS_TO_LONGS(info->bit+1); + if (words > par->net->ct.label_words) + par->net->ct.label_words = words; + + return ret; +} + +static void connlabel_mt_destroy(const struct xt_mtdtor_param *par) +{ + par->net->ct.labels_used--; + if (par->net->ct.labels_used == 0) + par->net->ct.label_words = 0; + nf_ct_l3proto_module_put(par->family); +} + +static struct xt_match connlabels_mt_reg __read_mostly = { + .name = "connlabel", + .family = NFPROTO_UNSPEC, + .checkentry = connlabel_mt_check, + .match = connlabel_mt, + .matchsize = sizeof(struct xt_connlabel_mtinfo), + .destroy = connlabel_mt_destroy, + .me = THIS_MODULE, +}; + +static int __init connlabel_mt_init(void) +{ + return xt_register_match(&connlabels_mt_reg); +} + +static void __exit connlabel_mt_exit(void) +{ + xt_unregister_match(&connlabels_mt_reg); +} + +module_init(connlabel_mt_init); +module_exit(connlabel_mt_exit); -- cgit v0.10.2 From 0ceabd83875b72a29f33db4ab703d6ba40ea4c58 Mon Sep 17 00:00:00 2001 From: Florian Westphal Date: Fri, 11 Jan 2013 06:30:45 +0000 Subject: netfilter: ctnetlink: deliver labels to userspace Introduce CTA_LABELS attribute to send a bit-vector of currently active labels to userspace. Future patch will permit userspace to also set/delete active labels. Signed-off-by: Florian Westphal Signed-off-by: Pablo Neira Ayuso diff --git a/include/uapi/linux/netfilter/nf_conntrack_common.h b/include/uapi/linux/netfilter/nf_conntrack_common.h index 1644cdd..d69483f 100644 --- a/include/uapi/linux/netfilter/nf_conntrack_common.h +++ b/include/uapi/linux/netfilter/nf_conntrack_common.h @@ -101,6 +101,7 @@ enum ip_conntrack_events { IPCT_MARK, /* new mark has been set */ IPCT_NATSEQADJ, /* NAT is doing sequence adjustment */ IPCT_SECMARK, /* new security mark has been set */ + IPCT_LABEL, /* new connlabel has been set */ }; enum ip_conntrack_expect_events { diff --git a/include/uapi/linux/netfilter/nfnetlink_conntrack.h b/include/uapi/linux/netfilter/nfnetlink_conntrack.h index 86e930c..9e71e0c 100644 --- a/include/uapi/linux/netfilter/nfnetlink_conntrack.h +++ b/include/uapi/linux/netfilter/nfnetlink_conntrack.h @@ -49,6 +49,7 @@ enum ctattr_type { CTA_SECCTX, CTA_TIMESTAMP, CTA_MARK_MASK, + CTA_LABELS, __CTA_MAX }; #define CTA_MAX (__CTA_MAX - 1) diff --git a/net/netfilter/nf_conntrack_labels.c b/net/netfilter/nf_conntrack_labels.c index 0c542f4..ac5d080 100644 --- a/net/netfilter/nf_conntrack_labels.c +++ b/net/netfilter/nf_conntrack_labels.c @@ -46,7 +46,7 @@ int nf_connlabel_set(struct nf_conn *ct, u16 bit) return 0; if (test_and_set_bit(bit, labels->bits)) - return 0; + nf_conntrack_event_cache(IPCT_LABEL, ct); return 0; } diff --git a/net/netfilter/nf_conntrack_netlink.c b/net/netfilter/nf_conntrack_netlink.c index e0b10ee..5f53863 100644 --- a/net/netfilter/nf_conntrack_netlink.c +++ b/net/netfilter/nf_conntrack_netlink.c @@ -324,6 +324,40 @@ nla_put_failure: #define ctnetlink_dump_secctx(a, b) (0) #endif +#ifdef CONFIG_NF_CONNTRACK_LABELS +static int ctnetlink_label_size(const struct nf_conn *ct) +{ + struct nf_conn_labels *labels = nf_ct_labels_find(ct); + + if (!labels) + return 0; + return nla_total_size(labels->words * sizeof(long)); +} + +static int +ctnetlink_dump_labels(struct sk_buff *skb, const struct nf_conn *ct) +{ + struct nf_conn_labels *labels = nf_ct_labels_find(ct); + unsigned int len, i; + + if (!labels) + return 0; + + len = labels->words * sizeof(long); + i = 0; + do { + if (labels->bits[i] != 0) + return nla_put(skb, CTA_LABELS, len, labels->bits); + i++; + } while (i < labels->words); + + return 0; +} +#else +#define ctnetlink_dump_labels(a, b) (0) +#define ctnetlink_label_size(a) (0) +#endif + #define master_tuple(ct) &(ct->master->tuplehash[IP_CT_DIR_ORIGINAL].tuple) static inline int @@ -464,6 +498,7 @@ ctnetlink_fill_info(struct sk_buff *skb, u32 portid, u32 seq, u32 type, ctnetlink_dump_helpinfo(skb, ct) < 0 || ctnetlink_dump_mark(skb, ct) < 0 || ctnetlink_dump_secctx(skb, ct) < 0 || + ctnetlink_dump_labels(skb, ct) < 0 || ctnetlink_dump_id(skb, ct) < 0 || ctnetlink_dump_use(skb, ct) < 0 || ctnetlink_dump_master(skb, ct) < 0 || @@ -562,6 +597,7 @@ ctnetlink_nlmsg_size(const struct nf_conn *ct) + nla_total_size(sizeof(u_int32_t)) /* CTA_MARK */ #endif + ctnetlink_proto_size(ct) + + ctnetlink_label_size(ct) ; } @@ -663,6 +699,9 @@ ctnetlink_conntrack_event(unsigned int events, struct nf_ct_event *item) && ctnetlink_dump_secctx(skb, ct) < 0) goto nla_put_failure; #endif + if (events & (1 << IPCT_LABEL) && + ctnetlink_dump_labels(skb, ct) < 0) + goto nla_put_failure; if (events & (1 << IPCT_RELATED) && ctnetlink_dump_master(skb, ct) < 0) @@ -1986,6 +2025,8 @@ ctnetlink_nfqueue_build(struct sk_buff *skb, struct nf_conn *ct) if (ct->mark && ctnetlink_dump_mark(skb, ct) < 0) goto nla_put_failure; #endif + if (ctnetlink_dump_labels(skb, ct) < 0) + goto nla_put_failure; rcu_read_unlock(); return 0; -- cgit v0.10.2 From 9b21f6a90924dfe8e5e686c314ddb441fb06501e Mon Sep 17 00:00:00 2001 From: Florian Westphal Date: Fri, 11 Jan 2013 06:30:46 +0000 Subject: netfilter: ctnetlink: allow userspace to modify labels Add the ability to set/clear labels assigned to a conntrack via ctnetlink. To allow userspace to only alter specific bits, Pablo suggested to add a new CTA_LABELS_MASK attribute: The new set of active labels is then determined via active = (active & ~mask) ^ changeset i.e., the mask selects those bits in the existing set that should be changed. This follows the same method already used by MARK and CONNMARK targets. Omitting CTA_LABELS_MASK is the same as setting all bits in CTA_LABELS_MASK to 1: The existing set is replaced by the one from userspace. Signed-off-by: Florian Westphal Signed-off-by: Pablo Neira Ayuso diff --git a/include/net/netfilter/nf_conntrack_labels.h b/include/net/netfilter/nf_conntrack_labels.h index b94fe31..a3ce5d0 100644 --- a/include/net/netfilter/nf_conntrack_labels.h +++ b/include/net/netfilter/nf_conntrack_labels.h @@ -46,6 +46,9 @@ static inline struct nf_conn_labels *nf_ct_labels_ext_add(struct nf_conn *ct) bool nf_connlabel_match(const struct nf_conn *ct, u16 bit); int nf_connlabel_set(struct nf_conn *ct, u16 bit); +int nf_connlabels_replace(struct nf_conn *ct, + const u32 *data, const u32 *mask, unsigned int words); + #ifdef CONFIG_NF_CONNTRACK_LABELS int nf_conntrack_labels_init(struct net *net); void nf_conntrack_labels_fini(struct net *net); diff --git a/include/uapi/linux/netfilter/nfnetlink_conntrack.h b/include/uapi/linux/netfilter/nfnetlink_conntrack.h index 9e71e0c..08fabc6 100644 --- a/include/uapi/linux/netfilter/nfnetlink_conntrack.h +++ b/include/uapi/linux/netfilter/nfnetlink_conntrack.h @@ -50,6 +50,7 @@ enum ctattr_type { CTA_TIMESTAMP, CTA_MARK_MASK, CTA_LABELS, + CTA_LABELS_MASK, __CTA_MAX }; #define CTA_MAX (__CTA_MAX - 1) diff --git a/net/netfilter/nf_conntrack_labels.c b/net/netfilter/nf_conntrack_labels.c index ac5d080..e1d1eb8 100644 --- a/net/netfilter/nf_conntrack_labels.c +++ b/net/netfilter/nf_conntrack_labels.c @@ -52,6 +52,49 @@ int nf_connlabel_set(struct nf_conn *ct, u16 bit) } EXPORT_SYMBOL_GPL(nf_connlabel_set); +#if IS_ENABLED(CONFIG_NF_CT_NETLINK) +static void replace_u32(u32 *address, u32 mask, u32 new) +{ + u32 old, tmp; + + do { + old = *address; + tmp = (old & mask) ^ new; + } while (cmpxchg(address, old, tmp) != old); +} + +int nf_connlabels_replace(struct nf_conn *ct, + const u32 *data, + const u32 *mask, unsigned int words32) +{ + struct nf_conn_labels *labels; + unsigned int size, i; + u32 *dst; + + labels = nf_ct_labels_find(ct); + if (!labels) + return -ENOSPC; + + size = labels->words * sizeof(long); + if (size < (words32 * sizeof(u32))) + words32 = size / sizeof(u32); + + dst = (u32 *) labels->bits; + if (words32) { + for (i = 0; i < words32; i++) + replace_u32(&dst[i], mask ? ~mask[i] : 0, data[i]); + } + + size /= sizeof(u32); + for (i = words32; i < size; i++) /* pad */ + replace_u32(&dst[i], 0, 0); + + nf_conntrack_event_cache(IPCT_LABEL, ct); + return 0; +} +EXPORT_SYMBOL_GPL(nf_connlabels_replace); +#endif + static struct nf_ct_ext_type labels_extend __read_mostly = { .len = sizeof(struct nf_conn_labels), .align = __alignof__(struct nf_conn_labels), diff --git a/net/netfilter/nf_conntrack_netlink.c b/net/netfilter/nf_conntrack_netlink.c index 5f53863..2334cc5 100644 --- a/net/netfilter/nf_conntrack_netlink.c +++ b/net/netfilter/nf_conntrack_netlink.c @@ -961,6 +961,7 @@ ctnetlink_parse_help(const struct nlattr *attr, char **helper_name, return 0; } +#define __CTA_LABELS_MAX_LENGTH ((XT_CONNLABEL_MAXBIT + 1) / BITS_PER_BYTE) static const struct nla_policy ct_nla_policy[CTA_MAX+1] = { [CTA_TUPLE_ORIG] = { .type = NLA_NESTED }, [CTA_TUPLE_REPLY] = { .type = NLA_NESTED }, @@ -977,6 +978,10 @@ static const struct nla_policy ct_nla_policy[CTA_MAX+1] = { [CTA_NAT_SEQ_ADJ_REPLY] = { .type = NLA_NESTED }, [CTA_ZONE] = { .type = NLA_U16 }, [CTA_MARK_MASK] = { .type = NLA_U32 }, + [CTA_LABELS] = { .type = NLA_BINARY, + .len = __CTA_LABELS_MAX_LENGTH }, + [CTA_LABELS_MASK] = { .type = NLA_BINARY, + .len = __CTA_LABELS_MAX_LENGTH }, }; static int @@ -1505,6 +1510,31 @@ ctnetlink_change_nat_seq_adj(struct nf_conn *ct, #endif static int +ctnetlink_attach_labels(struct nf_conn *ct, const struct nlattr * const cda[]) +{ +#ifdef CONFIG_NF_CONNTRACK_LABELS + size_t len = nla_len(cda[CTA_LABELS]); + const void *mask = cda[CTA_LABELS_MASK]; + + if (len & (sizeof(u32)-1)) /* must be multiple of u32 */ + return -EINVAL; + + if (mask) { + if (nla_len(cda[CTA_LABELS_MASK]) == 0 || + nla_len(cda[CTA_LABELS_MASK]) != len) + return -EINVAL; + mask = nla_data(cda[CTA_LABELS_MASK]); + } + + len /= sizeof(u32); + + return nf_connlabels_replace(ct, nla_data(cda[CTA_LABELS]), mask, len); +#else + return -EOPNOTSUPP; +#endif +} + +static int ctnetlink_change_conntrack(struct nf_conn *ct, const struct nlattr * const cda[]) { @@ -1550,6 +1580,11 @@ ctnetlink_change_conntrack(struct nf_conn *ct, return err; } #endif + if (cda[CTA_LABELS]) { + err = ctnetlink_attach_labels(ct, cda); + if (err < 0) + return err; + } return 0; } @@ -1758,6 +1793,10 @@ ctnetlink_new_conntrack(struct sock *ctnl, struct sk_buff *skb, else events = IPCT_NEW; + if (cda[CTA_LABELS] && + ctnetlink_attach_labels(ct, cda) == 0) + events |= (1 << IPCT_LABEL); + nf_conntrack_eventmask_report((1 << IPCT_REPLY) | (1 << IPCT_ASSURED) | (1 << IPCT_HELPER) | @@ -2055,6 +2094,11 @@ ctnetlink_nfqueue_parse_ct(const struct nlattr *cda[], struct nf_conn *ct) if (err < 0) return err; } + if (cda[CTA_LABELS]) { + err = ctnetlink_attach_labels(ct, cda); + if (err < 0) + return err; + } #if defined(CONFIG_NF_CONNTRACK_MARK) if (cda[CTA_MARK]) ct->mark = ntohl(nla_get_be32(cda[CTA_MARK])); -- cgit v0.10.2 From 5a406b0cdfa948c7d949b270374737b17ee1679f Mon Sep 17 00:00:00 2001 From: stephen hemminger Date: Fri, 28 Dec 2012 18:17:08 +0000 Subject: netfilter: nf_ct_snmp: add include file Prototype for nf_nat_snmp_hook is in nf_conntrack_snmp.h therefore it should be included to get type checking. Found by sparse. Signed-off-by: Stephen Hemminger Signed-off-by: Pablo Neira Ayuso diff --git a/net/netfilter/nf_conntrack_snmp.c b/net/netfilter/nf_conntrack_snmp.c index 6e545e2..87b95a2 100644 --- a/net/netfilter/nf_conntrack_snmp.c +++ b/net/netfilter/nf_conntrack_snmp.c @@ -16,6 +16,7 @@ #include #include #include +#include #define SNMP_PORT 161 -- cgit v0.10.2 From e6f30c731718db45cec380964dfee210307cfc4a Mon Sep 17 00:00:00 2001 From: Willem de Bruijn Date: Fri, 18 Jan 2013 07:17:30 +0000 Subject: netfilter: x_tables: add xt_bpf match Support arbitrary linux socket filter (BPF) programs as x_tables match rules. This allows for very expressive filters, and on platforms with BPF JIT appears competitive with traditional hardcoded iptables rules using the u32 match. The size of the filter has been artificially limited to 64 instructions maximum to avoid bloating the size of each rule using this new match. Signed-off-by: Willem de Bruijn Signed-off-by: Pablo Neira Ayuso diff --git a/include/uapi/linux/netfilter/xt_bpf.h b/include/uapi/linux/netfilter/xt_bpf.h new file mode 100644 index 0000000..5dda450 --- /dev/null +++ b/include/uapi/linux/netfilter/xt_bpf.h @@ -0,0 +1,17 @@ +#ifndef _XT_BPF_H +#define _XT_BPF_H + +#include +#include + +#define XT_BPF_MAX_NUM_INSTR 64 + +struct xt_bpf_info { + __u16 bpf_program_num_elem; + struct sock_filter bpf_program[XT_BPF_MAX_NUM_INSTR]; + + /* only used in the kernel */ + struct sk_filter *filter __attribute__((aligned(8))); +}; + +#endif /*_XT_BPF_H */ diff --git a/net/netfilter/Kconfig b/net/netfilter/Kconfig index bb48607..eb2c8eb 100644 --- a/net/netfilter/Kconfig +++ b/net/netfilter/Kconfig @@ -811,6 +811,15 @@ config NETFILTER_XT_MATCH_ADDRTYPE If you want to compile it as a module, say M here and read . If unsure, say `N'. +config NETFILTER_XT_MATCH_BPF + tristate '"bpf" match support' + depends on NETFILTER_ADVANCED + help + BPF matching applies a linux socket filter to each packet and + accepts those for which the filter returns non-zero. + + To compile it as a module, choose M here. If unsure, say N. + config NETFILTER_XT_MATCH_CLUSTER tristate '"cluster" match support' depends on NF_CONNTRACK diff --git a/net/netfilter/Makefile b/net/netfilter/Makefile index b3bbda6..a1abf87 100644 --- a/net/netfilter/Makefile +++ b/net/netfilter/Makefile @@ -99,6 +99,7 @@ obj-$(CONFIG_NETFILTER_XT_TARGET_IDLETIMER) += xt_IDLETIMER.o # matches obj-$(CONFIG_NETFILTER_XT_MATCH_ADDRTYPE) += xt_addrtype.o +obj-$(CONFIG_NETFILTER_XT_MATCH_BPF) += xt_bpf.o obj-$(CONFIG_NETFILTER_XT_MATCH_CLUSTER) += xt_cluster.o obj-$(CONFIG_NETFILTER_XT_MATCH_COMMENT) += xt_comment.o obj-$(CONFIG_NETFILTER_XT_MATCH_CONNBYTES) += xt_connbytes.o diff --git a/net/netfilter/xt_bpf.c b/net/netfilter/xt_bpf.c new file mode 100644 index 0000000..12d4da8 --- /dev/null +++ b/net/netfilter/xt_bpf.c @@ -0,0 +1,73 @@ +/* Xtables module to match packets using a BPF filter. + * Copyright 2013 Google Inc. + * Written by Willem de Bruijn + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include +#include +#include + +#include +#include + +MODULE_AUTHOR("Willem de Bruijn "); +MODULE_DESCRIPTION("Xtables: BPF filter match"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("ipt_bpf"); +MODULE_ALIAS("ip6t_bpf"); + +static int bpf_mt_check(const struct xt_mtchk_param *par) +{ + struct xt_bpf_info *info = par->matchinfo; + struct sock_fprog program; + + program.len = info->bpf_program_num_elem; + program.filter = (struct sock_filter __user *) info->bpf_program; + if (sk_unattached_filter_create(&info->filter, &program)) { + pr_info("bpf: check failed: parse error\n"); + return -EINVAL; + } + + return 0; +} + +static bool bpf_mt(const struct sk_buff *skb, struct xt_action_param *par) +{ + const struct xt_bpf_info *info = par->matchinfo; + + return SK_RUN_FILTER(info->filter, skb); +} + +static void bpf_mt_destroy(const struct xt_mtdtor_param *par) +{ + const struct xt_bpf_info *info = par->matchinfo; + sk_unattached_filter_destroy(info->filter); +} + +static struct xt_match bpf_mt_reg __read_mostly = { + .name = "bpf", + .revision = 0, + .family = NFPROTO_UNSPEC, + .checkentry = bpf_mt_check, + .match = bpf_mt, + .destroy = bpf_mt_destroy, + .matchsize = sizeof(struct xt_bpf_info), + .me = THIS_MODULE, +}; + +static int __init bpf_mt_init(void) +{ + return xt_register_match(&bpf_mt_reg); +} + +static void __exit bpf_mt_exit(void) +{ + xt_unregister_match(&bpf_mt_reg); +} + +module_init(bpf_mt_init); +module_exit(bpf_mt_exit); -- cgit v0.10.2 From e7db3cbcd6508235d63ba4a31bbd1ce4fdece6e1 Mon Sep 17 00:00:00 2001 From: Pablo Neira Ayuso Date: Mon, 21 Jan 2013 12:30:59 +0100 Subject: netfilter: add missing xt_bpf.h header in installation Signed-off-by: Pablo Neira Ayuso diff --git a/include/uapi/linux/netfilter/Kbuild b/include/uapi/linux/netfilter/Kbuild index 08f555f..8b4bd36 100644 --- a/include/uapi/linux/netfilter/Kbuild +++ b/include/uapi/linux/netfilter/Kbuild @@ -35,6 +35,7 @@ header-y += xt_TCPOPTSTRIP.h header-y += xt_TEE.h header-y += xt_TPROXY.h header-y += xt_addrtype.h +header-y += xt_bpf.h header-y += xt_cluster.h header-y += xt_comment.h header-y += xt_connbytes.h -- cgit v0.10.2 From c9f9e0e1597f99d605212356f5a220c757d190ac Mon Sep 17 00:00:00 2001 From: Jiri Pirko Date: Thu, 17 Jan 2013 23:05:08 +0000 Subject: netfilter: doc: add nf_conntrack sysctl api documentation I grepped through the code and picked bits about nf_conntrack sysctl api and put that into one documentation file. [ I have mangled this patch including comments from several grammar improvements proposed by Neal Murphy , any new grammar error is my mistake --pablo ] Signed-off-by: Jiri Pirko Signed-off-by: Pablo Neira Ayuso diff --git a/Documentation/networking/nf_conntrack-sysctl.txt b/Documentation/networking/nf_conntrack-sysctl.txt new file mode 100644 index 0000000..70da508 --- /dev/null +++ b/Documentation/networking/nf_conntrack-sysctl.txt @@ -0,0 +1,176 @@ +/proc/sys/net/netfilter/nf_conntrack_* Variables: + +nf_conntrack_acct - BOOLEAN + 0 - disabled (default) + not 0 - enabled + + Enable connection tracking flow accounting. 64-bit byte and packet + counters per flow are added. + +nf_conntrack_buckets - INTEGER (read-only) + Size of hash table. If not specified as parameter during module + loading, the default size is calculated by dividing total memory + by 16384 to determine the number of buckets but the hash table will + never have fewer than 32 or more than 16384 buckets. + +nf_conntrack_checksum - BOOLEAN + 0 - disabled + not 0 - enabled (default) + + Verify checksum of incoming packets. Packets with bad checksums are + in INVALID state. If this is enabled, such packets will not be + considered for connection tracking. + +nf_conntrack_count - INTEGER (read-only) + Number of currently allocated flow entries. + +nf_conntrack_events - BOOLEAN + 0 - disabled + not 0 - enabled (default) + + If this option is enabled, the connection tracking code will + provide userspace with connection tracking events via ctnetlink. + +nf_conntrack_events_retry_timeout - INTEGER (seconds) + default 15 + + This option is only relevant when "reliable connection tracking + events" are used. Normally, ctnetlink is "lossy", that is, + events are normally dropped when userspace listeners can't keep up. + + Userspace can request "reliable event mode". When this mode is + active, the conntrack will only be destroyed after the event was + delivered. If event delivery fails, the kernel periodically + re-tries to send the event to userspace. + + This is the maximum interval the kernel should use when re-trying + to deliver the destroy event. + + A higher number means there will be fewer delivery retries and it + will take longer for a backlog to be processed. + +nf_conntrack_expect_max - INTEGER + Maximum size of expectation table. Default value is + nf_conntrack_buckets / 256. Minimum is 1. + +nf_conntrack_frag6_high_thresh - INTEGER + default 262144 + + Maximum memory used to reassemble IPv6 fragments. When + nf_conntrack_frag6_high_thresh bytes of memory is allocated for this + purpose, the fragment handler will toss packets until + nf_conntrack_frag6_low_thresh is reached. + +nf_conntrack_frag6_low_thresh - INTEGER + default 196608 + + See nf_conntrack_frag6_low_thresh + +nf_conntrack_frag6_timeout - INTEGER (seconds) + default 60 + + Time to keep an IPv6 fragment in memory. + +nf_conntrack_generic_timeout - INTEGER (seconds) + default 600 + + Default for generic timeout. This refers to layer 4 unknown/unsupported + protocols. + +nf_conntrack_helper - BOOLEAN + 0 - disabled + not 0 - enabled (default) + + Enable automatic conntrack helper assignment. + +nf_conntrack_icmp_timeout - INTEGER (seconds) + default 30 + + Default for ICMP timeout. + +nf_conntrack_icmpv6_timeout - INTEGER (seconds) + default 30 + + Default for ICMP6 timeout. + +nf_conntrack_log_invalid - INTEGER + 0 - disable (default) + 1 - log ICMP packets + 6 - log TCP packets + 17 - log UDP packets + 33 - log DCCP packets + 41 - log ICMPv6 packets + 136 - log UDPLITE packets + 255 - log packets of any protocol + + Log invalid packets of a type specified by value. + +nf_conntrack_max - INTEGER + Size of connection tracking table. Default value is + nf_conntrack_buckets value * 4. + +nf_conntrack_tcp_be_liberal - BOOLEAN + 0 - disabled (default) + not 0 - enabled + + Be conservative in what you do, be liberal in what you accept from others. + If it's non-zero, we mark only out of window RST segments as INVALID. + +nf_conntrack_tcp_loose - BOOLEAN + 0 - disabled + not 0 - enabled (default) + + If it is set to zero, we disable picking up already established + connections. + +nf_conntrack_tcp_max_retrans - INTEGER + default 3 + + Maximum number of packets that can be retransmitted without + received an (acceptable) ACK from the destination. If this number + is reached, a shorter timer will be started. + +nf_conntrack_tcp_timeout_close - INTEGER (seconds) + default 10 + +nf_conntrack_tcp_timeout_close_wait - INTEGER (seconds) + default 60 + +nf_conntrack_tcp_timeout_established - INTEGER (seconds) + default 432000 (5 days) + +nf_conntrack_tcp_timeout_fin_wait - INTEGER (seconds) + default 120 + +nf_conntrack_tcp_timeout_last_ack - INTEGER (seconds) + default 30 + +nf_conntrack_tcp_timeout_max_retrans - INTEGER (seconds) + default 300 + +nf_conntrack_tcp_timeout_syn_recv - INTEGER (seconds) + default 60 + +nf_conntrack_tcp_timeout_syn_sent - INTEGER (seconds) + default 120 + +nf_conntrack_tcp_timeout_time_wait - INTEGER (seconds) + default 120 + +nf_conntrack_tcp_timeout_unacknowledged - INTEGER (seconds) + default 300 + +nf_conntrack_timestamp - BOOLEAN + 0 - disabled (default) + not 0 - enabled + + Enable connection tracking flow timestamping. + +nf_conntrack_udp_timeout - INTEGER (seconds) + default 30 + +nf_conntrack_udp_timeout_stream2 - INTEGER (seconds) + default 180 + + This extended timeout will be used in case there is an UDP stream + detected. -- cgit v0.10.2 From 8a454ab95e5ccbffd04363e9c028f60739bc3fa4 Mon Sep 17 00:00:00 2001 From: Pablo Neira Ayuso Date: Mon, 21 Jan 2013 13:02:19 +0100 Subject: netfilter: add missing xt_connlabel.h header in installation In (c539f01 netfilter: add connlabel conntrack extension), it was missing the change to the Kbuild file to install the header in the system. Reported-by: Florian Westphal Signed-off-by: Pablo Neira Ayuso diff --git a/include/uapi/linux/netfilter/Kbuild b/include/uapi/linux/netfilter/Kbuild index 8b4bd36..4111577 100644 --- a/include/uapi/linux/netfilter/Kbuild +++ b/include/uapi/linux/netfilter/Kbuild @@ -39,6 +39,7 @@ header-y += xt_bpf.h header-y += xt_cluster.h header-y += xt_comment.h header-y += xt_connbytes.h +header-y += xt_connlabel.h header-y += xt_connlimit.h header-y += xt_connmark.h header-y += xt_conntrack.h -- cgit v0.10.2 From f94161c1bbdf7af11729cf106b4452f2432448e0 Mon Sep 17 00:00:00 2001 From: Gao feng Date: Mon, 21 Jan 2013 22:10:24 +0000 Subject: netfilter: nf_conntrack: move initialization out of pernet operations nf_conntrack initialization and cleanup codes happens in pernet operations function. This task should be done in module_init/exit. We can't use init_net to identify if it's the right time to initialize or cleanup since we cannot make assumption on the order netns are created/destroyed. Signed-off-by: Gao feng Signed-off-by: Pablo Neira Ayuso diff --git a/include/net/netfilter/nf_conntrack_core.h b/include/net/netfilter/nf_conntrack_core.h index e98aeb3..e05c1f6 100644 --- a/include/net/netfilter/nf_conntrack_core.h +++ b/include/net/netfilter/nf_conntrack_core.h @@ -25,12 +25,16 @@ extern unsigned int nf_conntrack_in(struct net *net, unsigned int hooknum, struct sk_buff *skb); -extern int nf_conntrack_init(struct net *net); -extern void nf_conntrack_cleanup(struct net *net); +extern int nf_conntrack_init_net(struct net *net); +extern void nf_conntrack_cleanup_net(struct net *net); extern int nf_conntrack_proto_init(struct net *net); extern void nf_conntrack_proto_fini(struct net *net); +extern int nf_conntrack_init_start(void); +extern void nf_conntrack_cleanup_start(void); + +extern void nf_conntrack_init_end(void); extern void nf_conntrack_cleanup_end(void); extern bool diff --git a/net/netfilter/nf_conntrack_core.c b/net/netfilter/nf_conntrack_core.c index 85aa4b7..fb3e514 100644 --- a/net/netfilter/nf_conntrack_core.c +++ b/net/netfilter/nf_conntrack_core.c @@ -1334,8 +1334,14 @@ static int untrack_refs(void) return cnt; } -static void nf_conntrack_cleanup_init_net(void) +void nf_conntrack_cleanup_start(void) { + RCU_INIT_POINTER(ip_ct_attach, NULL); +} + +void nf_conntrack_cleanup_end(void) +{ + RCU_INIT_POINTER(nf_ct_destroy, NULL); while (untrack_refs() > 0) schedule(); @@ -1344,8 +1350,18 @@ static void nf_conntrack_cleanup_init_net(void) #endif } -static void nf_conntrack_cleanup_net(struct net *net) +/* + * Mishearing the voices in his head, our hero wonders how he's + * supposed to kill the mall. + */ +void nf_conntrack_cleanup_net(struct net *net) { + /* + * This makes sure all current packets have passed through + * netfilter framework. Roll on, two-stage module + * delete... + */ + synchronize_net(); i_see_dead_people: nf_ct_iterate_cleanup(net, kill_all, NULL); nf_ct_release_dying_list(net); @@ -1355,6 +1371,7 @@ static void nf_conntrack_cleanup_net(struct net *net) } nf_ct_free_hashtable(net->ct.hash, net->ct.htable_size); + nf_conntrack_proto_fini(net); nf_conntrack_labels_fini(net); nf_conntrack_helper_fini(net); nf_conntrack_timeout_fini(net); @@ -1367,27 +1384,6 @@ static void nf_conntrack_cleanup_net(struct net *net) free_percpu(net->ct.stat); } -/* Mishearing the voices in his head, our hero wonders how he's - supposed to kill the mall. */ -void nf_conntrack_cleanup(struct net *net) -{ - if (net_eq(net, &init_net)) - RCU_INIT_POINTER(ip_ct_attach, NULL); - - /* This makes sure all current packets have passed through - netfilter framework. Roll on, two-stage module - delete... */ - synchronize_net(); - nf_conntrack_proto_fini(net); - nf_conntrack_cleanup_net(net); -} - -void nf_conntrack_cleanup_end(void) -{ - RCU_INIT_POINTER(nf_ct_destroy, NULL); - nf_conntrack_cleanup_init_net(); -} - void *nf_ct_alloc_hashtable(unsigned int *sizep, int nulls) { struct hlist_nulls_head *hash; @@ -1478,7 +1474,7 @@ void nf_ct_untracked_status_or(unsigned long bits) } EXPORT_SYMBOL_GPL(nf_ct_untracked_status_or); -static int nf_conntrack_init_init_net(void) +int nf_conntrack_init_start(void) { int max_factor = 8; int ret, cpu; @@ -1526,6 +1522,16 @@ err_extend: return ret; } +void nf_conntrack_init_end(void) +{ + /* For use by REJECT target */ + RCU_INIT_POINTER(ip_ct_attach, nf_conntrack_attach); + RCU_INIT_POINTER(nf_ct_destroy, destroy_conntrack); + + /* Howto get NAT offsets */ + RCU_INIT_POINTER(nf_ct_nat_offset, NULL); +} + /* * We need to use special "null" values, not used in hash table */ @@ -1533,7 +1539,7 @@ err_extend: #define DYING_NULLS_VAL ((1<<30)+1) #define TEMPLATE_NULLS_VAL ((1<<30)+2) -static int nf_conntrack_init_net(struct net *net) +int nf_conntrack_init_net(struct net *net) { int ret; @@ -1592,8 +1598,13 @@ static int nf_conntrack_init_net(struct net *net) if (ret < 0) goto err_labels; + ret = nf_conntrack_proto_init(net); + if (ret < 0) + goto err_proto; return 0; +err_proto: + nf_conntrack_labels_fini(net); err_labels: nf_conntrack_helper_fini(net); err_helper: @@ -1622,38 +1633,3 @@ s16 (*nf_ct_nat_offset)(const struct nf_conn *ct, enum ip_conntrack_dir dir, u32 seq); EXPORT_SYMBOL_GPL(nf_ct_nat_offset); - -int nf_conntrack_init(struct net *net) -{ - int ret; - - if (net_eq(net, &init_net)) { - ret = nf_conntrack_init_init_net(); - if (ret < 0) - goto out_init_net; - } - ret = nf_conntrack_proto_init(net); - if (ret < 0) - goto out_proto; - ret = nf_conntrack_init_net(net); - if (ret < 0) - goto out_net; - - if (net_eq(net, &init_net)) { - /* For use by REJECT target */ - RCU_INIT_POINTER(ip_ct_attach, nf_conntrack_attach); - RCU_INIT_POINTER(nf_ct_destroy, destroy_conntrack); - - /* Howto get NAT offsets */ - RCU_INIT_POINTER(nf_ct_nat_offset, NULL); - } - return 0; - -out_net: - nf_conntrack_proto_fini(net); -out_proto: - if (net_eq(net, &init_net)) - nf_conntrack_cleanup_init_net(); -out_init_net: - return ret; -} diff --git a/net/netfilter/nf_conntrack_standalone.c b/net/netfilter/nf_conntrack_standalone.c index e7185c6..725bf04 100644 --- a/net/netfilter/nf_conntrack_standalone.c +++ b/net/netfilter/nf_conntrack_standalone.c @@ -472,13 +472,6 @@ static int nf_conntrack_standalone_init_sysctl(struct net *net) { struct ctl_table *table; - if (net_eq(net, &init_net)) { - nf_ct_netfilter_header = - register_net_sysctl(&init_net, "net", nf_ct_netfilter_table); - if (!nf_ct_netfilter_header) - goto out; - } - table = kmemdup(nf_ct_sysctl_table, sizeof(nf_ct_sysctl_table), GFP_KERNEL); if (!table) @@ -502,10 +495,6 @@ static int nf_conntrack_standalone_init_sysctl(struct net *net) out_unregister_netfilter: kfree(table); out_kmemdup: - if (net_eq(net, &init_net)) - unregister_net_sysctl_table(nf_ct_netfilter_header); -out: - printk(KERN_ERR "nf_conntrack: can't register to sysctl.\n"); return -ENOMEM; } @@ -513,8 +502,6 @@ static void nf_conntrack_standalone_fini_sysctl(struct net *net) { struct ctl_table *table; - if (net_eq(net, &init_net)) - unregister_net_sysctl_table(nf_ct_netfilter_header); table = net->ct.sysctl_header->ctl_table_arg; unregister_net_sysctl_table(net->ct.sysctl_header); kfree(table); @@ -530,51 +517,78 @@ static void nf_conntrack_standalone_fini_sysctl(struct net *net) } #endif /* CONFIG_SYSCTL */ -static int nf_conntrack_net_init(struct net *net) +static int nf_conntrack_pernet_init(struct net *net) { int ret; - ret = nf_conntrack_init(net); + ret = nf_conntrack_init_net(net); if (ret < 0) goto out_init; + ret = nf_conntrack_standalone_init_proc(net); if (ret < 0) goto out_proc; + net->ct.sysctl_checksum = 1; net->ct.sysctl_log_invalid = 0; ret = nf_conntrack_standalone_init_sysctl(net); if (ret < 0) goto out_sysctl; + return 0; out_sysctl: nf_conntrack_standalone_fini_proc(net); out_proc: - nf_conntrack_cleanup(net); + nf_conntrack_cleanup_net(net); out_init: return ret; } -static void nf_conntrack_net_exit(struct net *net) +static void nf_conntrack_pernet_exit(struct net *net) { nf_conntrack_standalone_fini_sysctl(net); nf_conntrack_standalone_fini_proc(net); - nf_conntrack_cleanup(net); + nf_conntrack_cleanup_net(net); } static struct pernet_operations nf_conntrack_net_ops = { - .init = nf_conntrack_net_init, - .exit = nf_conntrack_net_exit, + .init = nf_conntrack_pernet_init, + .exit = nf_conntrack_pernet_exit, }; static int __init nf_conntrack_standalone_init(void) { - return register_pernet_subsys(&nf_conntrack_net_ops); + int ret = nf_conntrack_init_start(); + if (ret < 0) + goto out_start; + + nf_ct_netfilter_header = + register_net_sysctl(&init_net, "net", nf_ct_netfilter_table); + if (!nf_ct_netfilter_header) + goto out_sysctl; + + ret = register_pernet_subsys(&nf_conntrack_net_ops); + if (ret < 0) + goto out_pernet; + + nf_conntrack_init_end(); + return 0; + +out_pernet: + unregister_net_sysctl_table(nf_ct_netfilter_header); +out_sysctl: + pr_err("nf_conntrack: can't register to sysctl.\n"); + nf_conntrack_cleanup_end(); +out_start: + return ret; } static void __exit nf_conntrack_standalone_fini(void) { + nf_conntrack_cleanup_start(); unregister_pernet_subsys(&nf_conntrack_net_ops); + unregister_net_sysctl_table(nf_ct_netfilter_header); nf_conntrack_cleanup_end(); } -- cgit v0.10.2 From 83b4dbe19844b5472a8f44b6cf1d88693c080ef7 Mon Sep 17 00:00:00 2001 From: Gao feng Date: Mon, 21 Jan 2013 22:10:25 +0000 Subject: netfilter: nf_ct_expect: move initialization out of pernet_operations Move the global initial codes to the module_init/exit context. Signed-off-by: Gao feng Signed-off-by: Pablo Neira Ayuso diff --git a/include/net/netfilter/nf_conntrack_expect.h b/include/net/netfilter/nf_conntrack_expect.h index cc13f37..cbbae76 100644 --- a/include/net/netfilter/nf_conntrack_expect.h +++ b/include/net/netfilter/nf_conntrack_expect.h @@ -69,8 +69,11 @@ struct nf_conntrack_expect_policy { #define NF_CT_EXPECT_CLASS_DEFAULT 0 -int nf_conntrack_expect_init(struct net *net); -void nf_conntrack_expect_fini(struct net *net); +int nf_conntrack_expect_pernet_init(struct net *net); +void nf_conntrack_expect_pernet_fini(struct net *net); + +int nf_conntrack_expect_init(void); +void nf_conntrack_expect_fini(void); struct nf_conntrack_expect * __nf_ct_expect_find(struct net *net, u16 zone, diff --git a/net/netfilter/nf_conntrack_core.c b/net/netfilter/nf_conntrack_core.c index fb3e514..a3cca57 100644 --- a/net/netfilter/nf_conntrack_core.c +++ b/net/netfilter/nf_conntrack_core.c @@ -1348,6 +1348,7 @@ void nf_conntrack_cleanup_end(void) #ifdef CONFIG_NF_CONNTRACK_ZONES nf_ct_extend_unregister(&nf_ct_zone_extend); #endif + nf_conntrack_expect_fini(); } /* @@ -1378,7 +1379,7 @@ void nf_conntrack_cleanup_net(struct net *net) nf_conntrack_ecache_fini(net); nf_conntrack_tstamp_fini(net); nf_conntrack_acct_fini(net); - nf_conntrack_expect_fini(net); + nf_conntrack_expect_pernet_fini(net); kmem_cache_destroy(net->ct.nf_conntrack_cachep); kfree(net->ct.slabname); free_percpu(net->ct.stat); @@ -1501,6 +1502,11 @@ int nf_conntrack_init_start(void) printk(KERN_INFO "nf_conntrack version %s (%u buckets, %d max)\n", NF_CONNTRACK_VERSION, nf_conntrack_htable_size, nf_conntrack_max); + + ret = nf_conntrack_expect_init(); + if (ret < 0) + goto err_expect; + #ifdef CONFIG_NF_CONNTRACK_ZONES ret = nf_ct_extend_register(&nf_ct_zone_extend); if (ret < 0) @@ -1518,7 +1524,9 @@ int nf_conntrack_init_start(void) #ifdef CONFIG_NF_CONNTRACK_ZONES err_extend: + nf_conntrack_expect_fini(); #endif +err_expect: return ret; } @@ -1575,7 +1583,7 @@ int nf_conntrack_init_net(struct net *net) printk(KERN_ERR "Unable to create nf_conntrack_hash\n"); goto err_hash; } - ret = nf_conntrack_expect_init(net); + ret = nf_conntrack_expect_pernet_init(net); if (ret < 0) goto err_expect; ret = nf_conntrack_acct_init(net); @@ -1616,7 +1624,7 @@ err_ecache: err_tstamp: nf_conntrack_acct_fini(net); err_acct: - nf_conntrack_expect_fini(net); + nf_conntrack_expect_pernet_fini(net); err_expect: nf_ct_free_hashtable(net->ct.hash, net->ct.htable_size); err_hash: diff --git a/net/netfilter/nf_conntrack_expect.c b/net/netfilter/nf_conntrack_expect.c index 527651a..bdd3418 100644 --- a/net/netfilter/nf_conntrack_expect.c +++ b/net/netfilter/nf_conntrack_expect.c @@ -587,53 +587,50 @@ static void exp_proc_remove(struct net *net) module_param_named(expect_hashsize, nf_ct_expect_hsize, uint, 0400); -int nf_conntrack_expect_init(struct net *net) +int nf_conntrack_expect_pernet_init(struct net *net) { int err = -ENOMEM; - if (net_eq(net, &init_net)) { - if (!nf_ct_expect_hsize) { - nf_ct_expect_hsize = net->ct.htable_size / 256; - if (!nf_ct_expect_hsize) - nf_ct_expect_hsize = 1; - } - nf_ct_expect_max = nf_ct_expect_hsize * 4; - } - net->ct.expect_count = 0; net->ct.expect_hash = nf_ct_alloc_hashtable(&nf_ct_expect_hsize, 0); if (net->ct.expect_hash == NULL) goto err1; - if (net_eq(net, &init_net)) { - nf_ct_expect_cachep = kmem_cache_create("nf_conntrack_expect", - sizeof(struct nf_conntrack_expect), - 0, 0, NULL); - if (!nf_ct_expect_cachep) - goto err2; - } - err = exp_proc_init(net); if (err < 0) - goto err3; + goto err2; return 0; - -err3: - if (net_eq(net, &init_net)) - kmem_cache_destroy(nf_ct_expect_cachep); err2: nf_ct_free_hashtable(net->ct.expect_hash, nf_ct_expect_hsize); err1: return err; } -void nf_conntrack_expect_fini(struct net *net) +void nf_conntrack_expect_pernet_fini(struct net *net) { exp_proc_remove(net); - if (net_eq(net, &init_net)) { - rcu_barrier(); /* Wait for call_rcu() before destroy */ - kmem_cache_destroy(nf_ct_expect_cachep); - } nf_ct_free_hashtable(net->ct.expect_hash, nf_ct_expect_hsize); } + +int nf_conntrack_expect_init(void) +{ + if (!nf_ct_expect_hsize) { + nf_ct_expect_hsize = nf_conntrack_htable_size / 256; + if (!nf_ct_expect_hsize) + nf_ct_expect_hsize = 1; + } + nf_ct_expect_max = nf_ct_expect_hsize * 4; + nf_ct_expect_cachep = kmem_cache_create("nf_conntrack_expect", + sizeof(struct nf_conntrack_expect), + 0, 0, NULL); + if (!nf_ct_expect_cachep) + return -ENOMEM; + return 0; +} + +void nf_conntrack_expect_fini(void) +{ + rcu_barrier(); /* Wait for call_rcu() before destroy */ + kmem_cache_destroy(nf_ct_expect_cachep); +} -- cgit v0.10.2 From b7ff3a1fae78783e0ab1ef82f5978aeb89ddd16b Mon Sep 17 00:00:00 2001 From: Gao feng Date: Mon, 21 Jan 2013 22:10:26 +0000 Subject: netfilter: nf_ct_acct: move initialization out of pernet_operations Move the global initial codes to the module_init/exit context. Signed-off-by: Gao feng Signed-off-by: Pablo Neira Ayuso diff --git a/include/net/netfilter/nf_conntrack_acct.h b/include/net/netfilter/nf_conntrack_acct.h index 463ae8e..2bdb7a1 100644 --- a/include/net/netfilter/nf_conntrack_acct.h +++ b/include/net/netfilter/nf_conntrack_acct.h @@ -57,7 +57,9 @@ static inline void nf_ct_set_acct(struct net *net, bool enable) net->ct.sysctl_acct = enable; } -extern int nf_conntrack_acct_init(struct net *net); -extern void nf_conntrack_acct_fini(struct net *net); +extern int nf_conntrack_acct_pernet_init(struct net *net); +extern void nf_conntrack_acct_pernet_fini(struct net *net); +extern int nf_conntrack_acct_init(void); +extern void nf_conntrack_acct_fini(void); #endif /* _NF_CONNTRACK_ACCT_H */ diff --git a/net/netfilter/nf_conntrack_acct.c b/net/netfilter/nf_conntrack_acct.c index 7df424e..2d3030a 100644 --- a/net/netfilter/nf_conntrack_acct.c +++ b/net/netfilter/nf_conntrack_acct.c @@ -106,36 +106,26 @@ static void nf_conntrack_acct_fini_sysctl(struct net *net) } #endif -int nf_conntrack_acct_init(struct net *net) +int nf_conntrack_acct_pernet_init(struct net *net) { - int ret; - net->ct.sysctl_acct = nf_ct_acct; + return nf_conntrack_acct_init_sysctl(net); +} - if (net_eq(net, &init_net)) { - ret = nf_ct_extend_register(&acct_extend); - if (ret < 0) { - printk(KERN_ERR "nf_conntrack_acct: Unable to register extension\n"); - goto out_extend_register; - } - } +void nf_conntrack_acct_pernet_fini(struct net *net) +{ + nf_conntrack_acct_fini_sysctl(net); +} - ret = nf_conntrack_acct_init_sysctl(net); +int nf_conntrack_acct_init(void) +{ + int ret = nf_ct_extend_register(&acct_extend); if (ret < 0) - goto out_sysctl; - - return 0; - -out_sysctl: - if (net_eq(net, &init_net)) - nf_ct_extend_unregister(&acct_extend); -out_extend_register: + pr_err("nf_conntrack_acct: Unable to register extension\n"); return ret; } -void nf_conntrack_acct_fini(struct net *net) +void nf_conntrack_acct_fini(void) { - nf_conntrack_acct_fini_sysctl(net); - if (net_eq(net, &init_net)) - nf_ct_extend_unregister(&acct_extend); + nf_ct_extend_unregister(&acct_extend); } diff --git a/net/netfilter/nf_conntrack_core.c b/net/netfilter/nf_conntrack_core.c index a3cca57..f4c6d4a 100644 --- a/net/netfilter/nf_conntrack_core.c +++ b/net/netfilter/nf_conntrack_core.c @@ -1348,6 +1348,7 @@ void nf_conntrack_cleanup_end(void) #ifdef CONFIG_NF_CONNTRACK_ZONES nf_ct_extend_unregister(&nf_ct_zone_extend); #endif + nf_conntrack_acct_fini(); nf_conntrack_expect_fini(); } @@ -1378,7 +1379,7 @@ void nf_conntrack_cleanup_net(struct net *net) nf_conntrack_timeout_fini(net); nf_conntrack_ecache_fini(net); nf_conntrack_tstamp_fini(net); - nf_conntrack_acct_fini(net); + nf_conntrack_acct_pernet_fini(net); nf_conntrack_expect_pernet_fini(net); kmem_cache_destroy(net->ct.nf_conntrack_cachep); kfree(net->ct.slabname); @@ -1507,6 +1508,10 @@ int nf_conntrack_init_start(void) if (ret < 0) goto err_expect; + ret = nf_conntrack_acct_init(); + if (ret < 0) + goto err_acct; + #ifdef CONFIG_NF_CONNTRACK_ZONES ret = nf_ct_extend_register(&nf_ct_zone_extend); if (ret < 0) @@ -1524,8 +1529,10 @@ int nf_conntrack_init_start(void) #ifdef CONFIG_NF_CONNTRACK_ZONES err_extend: - nf_conntrack_expect_fini(); + nf_conntrack_acct_fini(); #endif +err_acct: + nf_conntrack_expect_fini(); err_expect: return ret; } @@ -1586,7 +1593,7 @@ int nf_conntrack_init_net(struct net *net) ret = nf_conntrack_expect_pernet_init(net); if (ret < 0) goto err_expect; - ret = nf_conntrack_acct_init(net); + ret = nf_conntrack_acct_pernet_init(net); if (ret < 0) goto err_acct; ret = nf_conntrack_tstamp_init(net); @@ -1622,7 +1629,7 @@ err_timeout: err_ecache: nf_conntrack_tstamp_fini(net); err_tstamp: - nf_conntrack_acct_fini(net); + nf_conntrack_acct_pernet_fini(net); err_acct: nf_conntrack_expect_pernet_fini(net); err_expect: -- cgit v0.10.2 From 73f4001a52c986114f540504d70b21e52eb0d92a Mon Sep 17 00:00:00 2001 From: Gao feng Date: Mon, 21 Jan 2013 22:10:27 +0000 Subject: netfilter: nf_ct_tstamp: move initialization out of pernet_operations Move the global initial codes to the module_init/exit context. Signed-off-by: Gao feng Signed-off-by: Pablo Neira Ayuso diff --git a/include/net/netfilter/nf_conntrack_timestamp.h b/include/net/netfilter/nf_conntrack_timestamp.h index fc9c82b..b004614 100644 --- a/include/net/netfilter/nf_conntrack_timestamp.h +++ b/include/net/netfilter/nf_conntrack_timestamp.h @@ -48,15 +48,28 @@ static inline void nf_ct_set_tstamp(struct net *net, bool enable) } #ifdef CONFIG_NF_CONNTRACK_TIMESTAMP -extern int nf_conntrack_tstamp_init(struct net *net); -extern void nf_conntrack_tstamp_fini(struct net *net); +extern int nf_conntrack_tstamp_pernet_init(struct net *net); +extern void nf_conntrack_tstamp_pernet_fini(struct net *net); + +extern int nf_conntrack_tstamp_init(void); +extern void nf_conntrack_tstamp_fini(void); #else -static inline int nf_conntrack_tstamp_init(struct net *net) +static inline int nf_conntrack_tstamp_pernet_init(struct net *net) +{ + return 0; +} + +static inline void nf_conntrack_tstamp_pernet_fini(struct net *net) +{ + return; +} + +static inline int nf_conntrack_tstamp_init(void) { return 0; } -static inline void nf_conntrack_tstamp_fini(struct net *net) +static inline void nf_conntrack_tstamp_fini(void) { return; } diff --git a/net/netfilter/nf_conntrack_core.c b/net/netfilter/nf_conntrack_core.c index f4c6d4a..20ebfff 100644 --- a/net/netfilter/nf_conntrack_core.c +++ b/net/netfilter/nf_conntrack_core.c @@ -1348,6 +1348,7 @@ void nf_conntrack_cleanup_end(void) #ifdef CONFIG_NF_CONNTRACK_ZONES nf_ct_extend_unregister(&nf_ct_zone_extend); #endif + nf_conntrack_tstamp_fini(); nf_conntrack_acct_fini(); nf_conntrack_expect_fini(); } @@ -1378,7 +1379,7 @@ void nf_conntrack_cleanup_net(struct net *net) nf_conntrack_helper_fini(net); nf_conntrack_timeout_fini(net); nf_conntrack_ecache_fini(net); - nf_conntrack_tstamp_fini(net); + nf_conntrack_tstamp_pernet_fini(net); nf_conntrack_acct_pernet_fini(net); nf_conntrack_expect_pernet_fini(net); kmem_cache_destroy(net->ct.nf_conntrack_cachep); @@ -1512,6 +1513,10 @@ int nf_conntrack_init_start(void) if (ret < 0) goto err_acct; + ret = nf_conntrack_tstamp_init(); + if (ret < 0) + goto err_tstamp; + #ifdef CONFIG_NF_CONNTRACK_ZONES ret = nf_ct_extend_register(&nf_ct_zone_extend); if (ret < 0) @@ -1529,8 +1534,10 @@ int nf_conntrack_init_start(void) #ifdef CONFIG_NF_CONNTRACK_ZONES err_extend: - nf_conntrack_acct_fini(); + nf_conntrack_tstamp_fini(); #endif +err_tstamp: + nf_conntrack_acct_fini(); err_acct: nf_conntrack_expect_fini(); err_expect: @@ -1596,7 +1603,7 @@ int nf_conntrack_init_net(struct net *net) ret = nf_conntrack_acct_pernet_init(net); if (ret < 0) goto err_acct; - ret = nf_conntrack_tstamp_init(net); + ret = nf_conntrack_tstamp_pernet_init(net); if (ret < 0) goto err_tstamp; ret = nf_conntrack_ecache_init(net); @@ -1627,7 +1634,7 @@ err_helper: err_timeout: nf_conntrack_ecache_fini(net); err_ecache: - nf_conntrack_tstamp_fini(net); + nf_conntrack_tstamp_pernet_fini(net); err_tstamp: nf_conntrack_acct_pernet_fini(net); err_acct: diff --git a/net/netfilter/nf_conntrack_timestamp.c b/net/netfilter/nf_conntrack_timestamp.c index 7ea8026..902fb0a 100644 --- a/net/netfilter/nf_conntrack_timestamp.c +++ b/net/netfilter/nf_conntrack_timestamp.c @@ -88,37 +88,28 @@ static void nf_conntrack_tstamp_fini_sysctl(struct net *net) } #endif -int nf_conntrack_tstamp_init(struct net *net) +int nf_conntrack_tstamp_pernet_init(struct net *net) { - int ret; - net->ct.sysctl_tstamp = nf_ct_tstamp; + return nf_conntrack_tstamp_init_sysctl(net); +} - if (net_eq(net, &init_net)) { - ret = nf_ct_extend_register(&tstamp_extend); - if (ret < 0) { - printk(KERN_ERR "nf_ct_tstamp: Unable to register " - "extension\n"); - goto out_extend_register; - } - } +void nf_conntrack_tstamp_pernet_fini(struct net *net) +{ + nf_conntrack_tstamp_fini_sysctl(net); + nf_ct_extend_unregister(&tstamp_extend); +} - ret = nf_conntrack_tstamp_init_sysctl(net); +int nf_conntrack_tstamp_init(void) +{ + int ret; + ret = nf_ct_extend_register(&tstamp_extend); if (ret < 0) - goto out_sysctl; - - return 0; - -out_sysctl: - if (net_eq(net, &init_net)) - nf_ct_extend_unregister(&tstamp_extend); -out_extend_register: + pr_err("nf_ct_tstamp: Unable to register extension\n"); return ret; } -void nf_conntrack_tstamp_fini(struct net *net) +void nf_conntrack_tstamp_fini(void) { - nf_conntrack_tstamp_fini_sysctl(net); - if (net_eq(net, &init_net)) - nf_ct_extend_unregister(&tstamp_extend); + nf_ct_extend_unregister(&tstamp_extend); } -- cgit v0.10.2 From 3fe0f943d4f52f875f0fdf8dbe472c8a9b852891 Mon Sep 17 00:00:00 2001 From: Gao feng Date: Mon, 21 Jan 2013 22:10:28 +0000 Subject: netfilter: nf_ct_ecache: move initialization out of pernet_operations Move the global initial codes to the module_init/exit context. Signed-off-by: Gao feng Signed-off-by: Pablo Neira Ayuso diff --git a/include/net/netfilter/nf_conntrack_ecache.h b/include/net/netfilter/nf_conntrack_ecache.h index 5654d29..092dc65 100644 --- a/include/net/netfilter/nf_conntrack_ecache.h +++ b/include/net/netfilter/nf_conntrack_ecache.h @@ -207,9 +207,11 @@ nf_ct_expect_event(enum ip_conntrack_expect_events event, nf_ct_expect_event_report(event, exp, 0, 0); } -extern int nf_conntrack_ecache_init(struct net *net); -extern void nf_conntrack_ecache_fini(struct net *net); +extern int nf_conntrack_ecache_pernet_init(struct net *net); +extern void nf_conntrack_ecache_pernet_fini(struct net *net); +extern int nf_conntrack_ecache_init(void); +extern void nf_conntrack_ecache_fini(void); #else /* CONFIG_NF_CONNTRACK_EVENTS */ static inline void nf_conntrack_event_cache(enum ip_conntrack_events event, @@ -232,12 +234,21 @@ static inline void nf_ct_expect_event_report(enum ip_conntrack_expect_events e, u32 portid, int report) {} -static inline int nf_conntrack_ecache_init(struct net *net) +static inline int nf_conntrack_ecache_pernet_init(struct net *net) { return 0; } -static inline void nf_conntrack_ecache_fini(struct net *net) +static inline void nf_conntrack_ecache_pernet_fini(struct net *net) +{ +} + +static inline int nf_conntrack_ecache_init(void) +{ + return 0; +} + +static inline void nf_conntrack_ecache_fini(void) { } #endif /* CONFIG_NF_CONNTRACK_EVENTS */ diff --git a/net/netfilter/nf_conntrack_core.c b/net/netfilter/nf_conntrack_core.c index 20ebfff..048fe77 100644 --- a/net/netfilter/nf_conntrack_core.c +++ b/net/netfilter/nf_conntrack_core.c @@ -1348,6 +1348,7 @@ void nf_conntrack_cleanup_end(void) #ifdef CONFIG_NF_CONNTRACK_ZONES nf_ct_extend_unregister(&nf_ct_zone_extend); #endif + nf_conntrack_ecache_fini(); nf_conntrack_tstamp_fini(); nf_conntrack_acct_fini(); nf_conntrack_expect_fini(); @@ -1378,7 +1379,7 @@ void nf_conntrack_cleanup_net(struct net *net) nf_conntrack_labels_fini(net); nf_conntrack_helper_fini(net); nf_conntrack_timeout_fini(net); - nf_conntrack_ecache_fini(net); + nf_conntrack_ecache_pernet_fini(net); nf_conntrack_tstamp_pernet_fini(net); nf_conntrack_acct_pernet_fini(net); nf_conntrack_expect_pernet_fini(net); @@ -1517,6 +1518,10 @@ int nf_conntrack_init_start(void) if (ret < 0) goto err_tstamp; + ret = nf_conntrack_ecache_init(); + if (ret < 0) + goto err_ecache; + #ifdef CONFIG_NF_CONNTRACK_ZONES ret = nf_ct_extend_register(&nf_ct_zone_extend); if (ret < 0) @@ -1534,8 +1539,10 @@ int nf_conntrack_init_start(void) #ifdef CONFIG_NF_CONNTRACK_ZONES err_extend: - nf_conntrack_tstamp_fini(); + nf_conntrack_ecache_fini(); #endif +err_ecache: + nf_conntrack_tstamp_fini(); err_tstamp: nf_conntrack_acct_fini(); err_acct: @@ -1606,7 +1613,7 @@ int nf_conntrack_init_net(struct net *net) ret = nf_conntrack_tstamp_pernet_init(net); if (ret < 0) goto err_tstamp; - ret = nf_conntrack_ecache_init(net); + ret = nf_conntrack_ecache_pernet_init(net); if (ret < 0) goto err_ecache; ret = nf_conntrack_timeout_init(net); @@ -1632,7 +1639,7 @@ err_labels: err_helper: nf_conntrack_timeout_fini(net); err_timeout: - nf_conntrack_ecache_fini(net); + nf_conntrack_ecache_pernet_fini(net); err_ecache: nf_conntrack_tstamp_pernet_fini(net); err_tstamp: diff --git a/net/netfilter/nf_conntrack_ecache.c b/net/netfilter/nf_conntrack_ecache.c index faa978f..b5d2eb8 100644 --- a/net/netfilter/nf_conntrack_ecache.c +++ b/net/netfilter/nf_conntrack_ecache.c @@ -233,38 +233,27 @@ static void nf_conntrack_event_fini_sysctl(struct net *net) } #endif /* CONFIG_SYSCTL */ -int nf_conntrack_ecache_init(struct net *net) +int nf_conntrack_ecache_pernet_init(struct net *net) { - int ret; - net->ct.sysctl_events = nf_ct_events; net->ct.sysctl_events_retry_timeout = nf_ct_events_retry_timeout; + return nf_conntrack_event_init_sysctl(net); +} - if (net_eq(net, &init_net)) { - ret = nf_ct_extend_register(&event_extend); - if (ret < 0) { - printk(KERN_ERR "nf_ct_event: Unable to register " - "event extension.\n"); - goto out_extend_register; - } - } +void nf_conntrack_ecache_pernet_fini(struct net *net) +{ + nf_conntrack_event_fini_sysctl(net); +} - ret = nf_conntrack_event_init_sysctl(net); +int nf_conntrack_ecache_init(void) +{ + int ret = nf_ct_extend_register(&event_extend); if (ret < 0) - goto out_sysctl; - - return 0; - -out_sysctl: - if (net_eq(net, &init_net)) - nf_ct_extend_unregister(&event_extend); -out_extend_register: + pr_err("nf_ct_event: Unable to register event extension.\n"); return ret; } -void nf_conntrack_ecache_fini(struct net *net) +void nf_conntrack_ecache_fini(void) { - nf_conntrack_event_fini_sysctl(net); - if (net_eq(net, &init_net)) - nf_ct_extend_unregister(&event_extend); + nf_ct_extend_unregister(&event_extend); } -- cgit v0.10.2 From 8684094cf17d8ce96e0a8c63003f331aa017e22d Mon Sep 17 00:00:00 2001 From: Gao feng Date: Mon, 21 Jan 2013 22:10:29 +0000 Subject: netfilter: nf_ct_timeout: move initialization out of pernet_operations Move the global initial codes to the module_init/exit context. Signed-off-by: Gao feng Signed-off-by: Pablo Neira Ayuso diff --git a/include/net/netfilter/nf_conntrack_timeout.h b/include/net/netfilter/nf_conntrack_timeout.h index e41e472..d23aceb 100644 --- a/include/net/netfilter/nf_conntrack_timeout.h +++ b/include/net/netfilter/nf_conntrack_timeout.h @@ -76,15 +76,15 @@ nf_ct_timeout_lookup(struct net *net, struct nf_conn *ct, } #ifdef CONFIG_NF_CONNTRACK_TIMEOUT -extern int nf_conntrack_timeout_init(struct net *net); -extern void nf_conntrack_timeout_fini(struct net *net); +extern int nf_conntrack_timeout_init(void); +extern void nf_conntrack_timeout_fini(void); #else -static inline int nf_conntrack_timeout_init(struct net *net) +static inline int nf_conntrack_timeout_init(void) { return 0; } -static inline void nf_conntrack_timeout_fini(struct net *net) +static inline void nf_conntrack_timeout_fini(void) { return; } diff --git a/net/netfilter/nf_conntrack_core.c b/net/netfilter/nf_conntrack_core.c index 048fe77..4f4d107 100644 --- a/net/netfilter/nf_conntrack_core.c +++ b/net/netfilter/nf_conntrack_core.c @@ -1348,6 +1348,7 @@ void nf_conntrack_cleanup_end(void) #ifdef CONFIG_NF_CONNTRACK_ZONES nf_ct_extend_unregister(&nf_ct_zone_extend); #endif + nf_conntrack_timeout_fini(); nf_conntrack_ecache_fini(); nf_conntrack_tstamp_fini(); nf_conntrack_acct_fini(); @@ -1378,7 +1379,6 @@ void nf_conntrack_cleanup_net(struct net *net) nf_conntrack_proto_fini(net); nf_conntrack_labels_fini(net); nf_conntrack_helper_fini(net); - nf_conntrack_timeout_fini(net); nf_conntrack_ecache_pernet_fini(net); nf_conntrack_tstamp_pernet_fini(net); nf_conntrack_acct_pernet_fini(net); @@ -1522,6 +1522,10 @@ int nf_conntrack_init_start(void) if (ret < 0) goto err_ecache; + ret = nf_conntrack_timeout_init(); + if (ret < 0) + goto err_timeout; + #ifdef CONFIG_NF_CONNTRACK_ZONES ret = nf_ct_extend_register(&nf_ct_zone_extend); if (ret < 0) @@ -1539,8 +1543,10 @@ int nf_conntrack_init_start(void) #ifdef CONFIG_NF_CONNTRACK_ZONES err_extend: - nf_conntrack_ecache_fini(); + nf_conntrack_timeout_fini(); #endif +err_timeout: + nf_conntrack_ecache_fini(); err_ecache: nf_conntrack_tstamp_fini(); err_tstamp: @@ -1616,9 +1622,6 @@ int nf_conntrack_init_net(struct net *net) ret = nf_conntrack_ecache_pernet_init(net); if (ret < 0) goto err_ecache; - ret = nf_conntrack_timeout_init(net); - if (ret < 0) - goto err_timeout; ret = nf_conntrack_helper_init(net); if (ret < 0) goto err_helper; @@ -1637,8 +1640,6 @@ err_proto: err_labels: nf_conntrack_helper_fini(net); err_helper: - nf_conntrack_timeout_fini(net); -err_timeout: nf_conntrack_ecache_pernet_fini(net); err_ecache: nf_conntrack_tstamp_pernet_fini(net); diff --git a/net/netfilter/nf_conntrack_timeout.c b/net/netfilter/nf_conntrack_timeout.c index a878ce5..93da609 100644 --- a/net/netfilter/nf_conntrack_timeout.c +++ b/net/netfilter/nf_conntrack_timeout.c @@ -37,24 +37,15 @@ static struct nf_ct_ext_type timeout_extend __read_mostly = { .id = NF_CT_EXT_TIMEOUT, }; -int nf_conntrack_timeout_init(struct net *net) +int nf_conntrack_timeout_init(void) { - int ret = 0; - - if (net_eq(net, &init_net)) { - ret = nf_ct_extend_register(&timeout_extend); - if (ret < 0) { - printk(KERN_ERR "nf_ct_timeout: Unable to register " - "timeout extension.\n"); - return ret; - } - } - - return 0; + int ret = nf_ct_extend_register(&timeout_extend); + if (ret < 0) + pr_err("nf_ct_timeout: Unable to register timeout extension.\n"); + return ret; } -void nf_conntrack_timeout_fini(struct net *net) +void nf_conntrack_timeout_fini(void) { - if (net_eq(net, &init_net)) - nf_ct_extend_unregister(&timeout_extend); + nf_ct_extend_unregister(&timeout_extend); } -- cgit v0.10.2 From 5e615b220087c5551f486c967831cecdfd338dbe Mon Sep 17 00:00:00 2001 From: Gao feng Date: Mon, 21 Jan 2013 22:10:30 +0000 Subject: netfilter: nf_ct_helper: move initialization out of pernet_operations Move the global initial codes to the module_init/exit context. Signed-off-by: Gao feng Signed-off-by: Pablo Neira Ayuso diff --git a/include/net/netfilter/nf_conntrack_helper.h b/include/net/netfilter/nf_conntrack_helper.h index 9aad956..ce27edf 100644 --- a/include/net/netfilter/nf_conntrack_helper.h +++ b/include/net/netfilter/nf_conntrack_helper.h @@ -82,8 +82,11 @@ static inline void *nfct_help_data(const struct nf_conn *ct) return (void *)help->data; } -extern int nf_conntrack_helper_init(struct net *net); -extern void nf_conntrack_helper_fini(struct net *net); +extern int nf_conntrack_helper_pernet_init(struct net *net); +extern void nf_conntrack_helper_pernet_fini(struct net *net); + +extern int nf_conntrack_helper_init(void); +extern void nf_conntrack_helper_fini(void); extern int nf_conntrack_broadcast_help(struct sk_buff *skb, unsigned int protoff, diff --git a/net/netfilter/nf_conntrack_core.c b/net/netfilter/nf_conntrack_core.c index 4f4d107..06b8cdb 100644 --- a/net/netfilter/nf_conntrack_core.c +++ b/net/netfilter/nf_conntrack_core.c @@ -1348,6 +1348,7 @@ void nf_conntrack_cleanup_end(void) #ifdef CONFIG_NF_CONNTRACK_ZONES nf_ct_extend_unregister(&nf_ct_zone_extend); #endif + nf_conntrack_helper_fini(); nf_conntrack_timeout_fini(); nf_conntrack_ecache_fini(); nf_conntrack_tstamp_fini(); @@ -1378,7 +1379,7 @@ void nf_conntrack_cleanup_net(struct net *net) nf_ct_free_hashtable(net->ct.hash, net->ct.htable_size); nf_conntrack_proto_fini(net); nf_conntrack_labels_fini(net); - nf_conntrack_helper_fini(net); + nf_conntrack_helper_pernet_fini(net); nf_conntrack_ecache_pernet_fini(net); nf_conntrack_tstamp_pernet_fini(net); nf_conntrack_acct_pernet_fini(net); @@ -1526,6 +1527,10 @@ int nf_conntrack_init_start(void) if (ret < 0) goto err_timeout; + ret = nf_conntrack_helper_init(); + if (ret < 0) + goto err_helper; + #ifdef CONFIG_NF_CONNTRACK_ZONES ret = nf_ct_extend_register(&nf_ct_zone_extend); if (ret < 0) @@ -1543,8 +1548,10 @@ int nf_conntrack_init_start(void) #ifdef CONFIG_NF_CONNTRACK_ZONES err_extend: - nf_conntrack_timeout_fini(); + nf_conntrack_helper_fini(); #endif +err_helper: + nf_conntrack_timeout_fini(); err_timeout: nf_conntrack_ecache_fini(); err_ecache: @@ -1622,7 +1629,7 @@ int nf_conntrack_init_net(struct net *net) ret = nf_conntrack_ecache_pernet_init(net); if (ret < 0) goto err_ecache; - ret = nf_conntrack_helper_init(net); + ret = nf_conntrack_helper_pernet_init(net); if (ret < 0) goto err_helper; @@ -1638,7 +1645,7 @@ int nf_conntrack_init_net(struct net *net) err_proto: nf_conntrack_labels_fini(net); err_labels: - nf_conntrack_helper_fini(net); + nf_conntrack_helper_pernet_fini(net); err_helper: nf_conntrack_ecache_pernet_fini(net); err_ecache: diff --git a/net/netfilter/nf_conntrack_helper.c b/net/netfilter/nf_conntrack_helper.c index 884f2b3..2f380f7 100644 --- a/net/netfilter/nf_conntrack_helper.c +++ b/net/netfilter/nf_conntrack_helper.c @@ -423,44 +423,41 @@ static struct nf_ct_ext_type helper_extend __read_mostly = { .id = NF_CT_EXT_HELPER, }; -int nf_conntrack_helper_init(struct net *net) +int nf_conntrack_helper_pernet_init(struct net *net) { - int err; - net->ct.auto_assign_helper_warned = false; net->ct.sysctl_auto_assign_helper = nf_ct_auto_assign_helper; + return nf_conntrack_helper_init_sysctl(net); +} - if (net_eq(net, &init_net)) { - nf_ct_helper_hsize = 1; /* gets rounded up to use one page */ - nf_ct_helper_hash = - nf_ct_alloc_hashtable(&nf_ct_helper_hsize, 0); - if (!nf_ct_helper_hash) - return -ENOMEM; +void nf_conntrack_helper_pernet_fini(struct net *net) +{ + nf_conntrack_helper_fini_sysctl(net); +} - err = nf_ct_extend_register(&helper_extend); - if (err < 0) - goto err1; +int nf_conntrack_helper_init(void) +{ + int ret; + nf_ct_helper_hsize = 1; /* gets rounded up to use one page */ + nf_ct_helper_hash = + nf_ct_alloc_hashtable(&nf_ct_helper_hsize, 0); + if (!nf_ct_helper_hash) + return -ENOMEM; + + ret = nf_ct_extend_register(&helper_extend); + if (ret < 0) { + pr_err("nf_ct_helper: Unable to register helper extension.\n"); + goto out_extend; } - err = nf_conntrack_helper_init_sysctl(net); - if (err < 0) - goto out_sysctl; - return 0; - -out_sysctl: - if (net_eq(net, &init_net)) - nf_ct_extend_unregister(&helper_extend); -err1: +out_extend: nf_ct_free_hashtable(nf_ct_helper_hash, nf_ct_helper_hsize); - return err; + return ret; } -void nf_conntrack_helper_fini(struct net *net) +void nf_conntrack_helper_fini(void) { - nf_conntrack_helper_fini_sysctl(net); - if (net_eq(net, &init_net)) { - nf_ct_extend_unregister(&helper_extend); - nf_ct_free_hashtable(nf_ct_helper_hash, nf_ct_helper_hsize); - } + nf_ct_extend_unregister(&helper_extend); + nf_ct_free_hashtable(nf_ct_helper_hash, nf_ct_helper_hsize); } -- cgit v0.10.2 From 5f69b8f5218dc303cbcb6f71d221c27d3cd17ebb Mon Sep 17 00:00:00 2001 From: Gao feng Date: Mon, 21 Jan 2013 22:10:31 +0000 Subject: netfilter: nf_ct_labels: move initialization out of pernet_operations Move the global initial codes to the module_init/exit context. Signed-off-by: Gao feng Signed-off-by: Pablo Neira Ayuso diff --git a/include/net/netfilter/nf_conntrack_labels.h b/include/net/netfilter/nf_conntrack_labels.h index a3ce5d0..c985695 100644 --- a/include/net/netfilter/nf_conntrack_labels.h +++ b/include/net/netfilter/nf_conntrack_labels.h @@ -50,9 +50,9 @@ int nf_connlabels_replace(struct nf_conn *ct, const u32 *data, const u32 *mask, unsigned int words); #ifdef CONFIG_NF_CONNTRACK_LABELS -int nf_conntrack_labels_init(struct net *net); -void nf_conntrack_labels_fini(struct net *net); +int nf_conntrack_labels_init(void); +void nf_conntrack_labels_fini(void); #else -static inline int nf_conntrack_labels_init(struct net *n) { return 0; } -static inline void nf_conntrack_labels_fini(struct net *net) {} +static inline int nf_conntrack_labels_init(void) { return 0; } +static inline void nf_conntrack_labels_fini(void) {} #endif diff --git a/net/netfilter/nf_conntrack_core.c b/net/netfilter/nf_conntrack_core.c index 06b8cdb..a4a3bcf 100644 --- a/net/netfilter/nf_conntrack_core.c +++ b/net/netfilter/nf_conntrack_core.c @@ -1348,6 +1348,7 @@ void nf_conntrack_cleanup_end(void) #ifdef CONFIG_NF_CONNTRACK_ZONES nf_ct_extend_unregister(&nf_ct_zone_extend); #endif + nf_conntrack_labels_fini(); nf_conntrack_helper_fini(); nf_conntrack_timeout_fini(); nf_conntrack_ecache_fini(); @@ -1378,7 +1379,6 @@ void nf_conntrack_cleanup_net(struct net *net) nf_ct_free_hashtable(net->ct.hash, net->ct.htable_size); nf_conntrack_proto_fini(net); - nf_conntrack_labels_fini(net); nf_conntrack_helper_pernet_fini(net); nf_conntrack_ecache_pernet_fini(net); nf_conntrack_tstamp_pernet_fini(net); @@ -1531,6 +1531,10 @@ int nf_conntrack_init_start(void) if (ret < 0) goto err_helper; + ret = nf_conntrack_labels_init(); + if (ret < 0) + goto err_labels; + #ifdef CONFIG_NF_CONNTRACK_ZONES ret = nf_ct_extend_register(&nf_ct_zone_extend); if (ret < 0) @@ -1548,8 +1552,10 @@ int nf_conntrack_init_start(void) #ifdef CONFIG_NF_CONNTRACK_ZONES err_extend: - nf_conntrack_helper_fini(); + nf_conntrack_labels_fini(); #endif +err_labels: + nf_conntrack_helper_fini(); err_helper: nf_conntrack_timeout_fini(); err_timeout: @@ -1632,19 +1638,12 @@ int nf_conntrack_init_net(struct net *net) ret = nf_conntrack_helper_pernet_init(net); if (ret < 0) goto err_helper; - - ret = nf_conntrack_labels_init(net); - if (ret < 0) - goto err_labels; - ret = nf_conntrack_proto_init(net); if (ret < 0) goto err_proto; return 0; err_proto: - nf_conntrack_labels_fini(net); -err_labels: nf_conntrack_helper_pernet_fini(net); err_helper: nf_conntrack_ecache_pernet_fini(net); diff --git a/net/netfilter/nf_conntrack_labels.c b/net/netfilter/nf_conntrack_labels.c index e1d1eb8..8fe2e99 100644 --- a/net/netfilter/nf_conntrack_labels.c +++ b/net/netfilter/nf_conntrack_labels.c @@ -101,15 +101,12 @@ static struct nf_ct_ext_type labels_extend __read_mostly = { .id = NF_CT_EXT_LABELS, }; -int nf_conntrack_labels_init(struct net *net) +int nf_conntrack_labels_init(void) { - if (net_eq(net, &init_net)) - return nf_ct_extend_register(&labels_extend); - return 0; + return nf_ct_extend_register(&labels_extend); } -void nf_conntrack_labels_fini(struct net *net) +void nf_conntrack_labels_fini(void) { - if (net_eq(net, &init_net)) - nf_ct_extend_unregister(&labels_extend); + nf_ct_extend_unregister(&labels_extend); } -- cgit v0.10.2 From 04d870017908f40bbb1c51910acc030ae4979db4 Mon Sep 17 00:00:00 2001 From: Gao feng Date: Mon, 21 Jan 2013 22:10:32 +0000 Subject: netfilter: nf_ct_proto: move initialization out of pernet_operations Move the global initial codes to the module_init/exit context. Signed-off-by: Gao feng Signed-off-by: Pablo Neira Ayuso diff --git a/include/net/netfilter/nf_conntrack_core.h b/include/net/netfilter/nf_conntrack_core.h index e05c1f6..930275fa 100644 --- a/include/net/netfilter/nf_conntrack_core.h +++ b/include/net/netfilter/nf_conntrack_core.h @@ -28,8 +28,11 @@ extern unsigned int nf_conntrack_in(struct net *net, extern int nf_conntrack_init_net(struct net *net); extern void nf_conntrack_cleanup_net(struct net *net); -extern int nf_conntrack_proto_init(struct net *net); -extern void nf_conntrack_proto_fini(struct net *net); +extern int nf_conntrack_proto_pernet_init(struct net *net); +extern void nf_conntrack_proto_pernet_fini(struct net *net); + +extern int nf_conntrack_proto_init(void); +extern void nf_conntrack_proto_fini(void); extern int nf_conntrack_init_start(void); extern void nf_conntrack_cleanup_start(void); diff --git a/net/netfilter/nf_conntrack_core.c b/net/netfilter/nf_conntrack_core.c index a4a3bcf..c8e001a 100644 --- a/net/netfilter/nf_conntrack_core.c +++ b/net/netfilter/nf_conntrack_core.c @@ -1348,6 +1348,7 @@ void nf_conntrack_cleanup_end(void) #ifdef CONFIG_NF_CONNTRACK_ZONES nf_ct_extend_unregister(&nf_ct_zone_extend); #endif + nf_conntrack_proto_fini(); nf_conntrack_labels_fini(); nf_conntrack_helper_fini(); nf_conntrack_timeout_fini(); @@ -1378,7 +1379,7 @@ void nf_conntrack_cleanup_net(struct net *net) } nf_ct_free_hashtable(net->ct.hash, net->ct.htable_size); - nf_conntrack_proto_fini(net); + nf_conntrack_proto_pernet_fini(net); nf_conntrack_helper_pernet_fini(net); nf_conntrack_ecache_pernet_fini(net); nf_conntrack_tstamp_pernet_fini(net); @@ -1540,6 +1541,10 @@ int nf_conntrack_init_start(void) if (ret < 0) goto err_extend; #endif + ret = nf_conntrack_proto_init(); + if (ret < 0) + goto err_proto; + /* Set up fake conntrack: to never be deleted, not in any hashes */ for_each_possible_cpu(cpu) { struct nf_conn *ct = &per_cpu(nf_conntrack_untracked, cpu); @@ -1550,10 +1555,12 @@ int nf_conntrack_init_start(void) nf_ct_untracked_status_or(IPS_CONFIRMED | IPS_UNTRACKED); return 0; +err_proto: #ifdef CONFIG_NF_CONNTRACK_ZONES + nf_ct_extend_unregister(&nf_ct_zone_extend); err_extend: - nf_conntrack_labels_fini(); #endif + nf_conntrack_labels_fini(); err_labels: nf_conntrack_helper_fini(); err_helper: @@ -1638,7 +1645,7 @@ int nf_conntrack_init_net(struct net *net) ret = nf_conntrack_helper_pernet_init(net); if (ret < 0) goto err_helper; - ret = nf_conntrack_proto_init(net); + ret = nf_conntrack_proto_pernet_init(net); if (ret < 0) goto err_proto; return 0; diff --git a/net/netfilter/nf_conntrack_proto.c b/net/netfilter/nf_conntrack_proto.c index 51e928d..f0ec07c 100644 --- a/net/netfilter/nf_conntrack_proto.c +++ b/net/netfilter/nf_conntrack_proto.c @@ -503,9 +503,8 @@ void nf_conntrack_l4proto_unregister(struct net *net, } EXPORT_SYMBOL_GPL(nf_conntrack_l4proto_unregister); -int nf_conntrack_proto_init(struct net *net) +int nf_conntrack_proto_pernet_init(struct net *net) { - unsigned int i; int err; struct nf_proto_net *pn = nf_ct_l4proto_net(net, &nf_conntrack_l4proto_generic); @@ -520,19 +519,12 @@ int nf_conntrack_proto_init(struct net *net) if (err < 0) return err; - if (net == &init_net) { - for (i = 0; i < AF_MAX; i++) - rcu_assign_pointer(nf_ct_l3protos[i], - &nf_conntrack_l3proto_generic); - } - pn->users++; return 0; } -void nf_conntrack_proto_fini(struct net *net) +void nf_conntrack_proto_pernet_fini(struct net *net) { - unsigned int i; struct nf_proto_net *pn = nf_ct_l4proto_net(net, &nf_conntrack_l4proto_generic); @@ -540,9 +532,21 @@ void nf_conntrack_proto_fini(struct net *net) nf_ct_l4proto_unregister_sysctl(net, pn, &nf_conntrack_l4proto_generic); - if (net == &init_net) { - /* free l3proto protocol tables */ - for (i = 0; i < PF_MAX; i++) - kfree(nf_ct_protos[i]); - } +} + +int nf_conntrack_proto_init(void) +{ + unsigned int i; + for (i = 0; i < AF_MAX; i++) + rcu_assign_pointer(nf_ct_l3protos[i], + &nf_conntrack_l3proto_generic); + return 0; +} + +void nf_conntrack_proto_fini(void) +{ + unsigned int i; + /* free l3proto protocol tables */ + for (i = 0; i < PF_MAX; i++) + kfree(nf_ct_protos[i]); } -- cgit v0.10.2 From 6330750d566d764ce4916d8fe2bcdcad28fc7a42 Mon Sep 17 00:00:00 2001 From: Gao feng Date: Mon, 21 Jan 2013 22:10:33 +0000 Subject: netfilter: nf_conntrack: refactor l3proto support for netns Move the code that register/unregister l3proto to the module_init/exit context. Given that we have to modify some interfaces to accomodate these changes, it is a good time to use shorter function names for this using the nf_ct_* prefix instead of nf_conntrack_*, that is: nf_ct_l3proto_register nf_ct_l3proto_pernet_register nf_ct_l3proto_unregister nf_ct_l3proto_pernet_unregister We same many line breaks with it. Signed-off-by: Gao feng Signed-off-by: Pablo Neira Ayuso diff --git a/include/net/netfilter/nf_conntrack_l3proto.h b/include/net/netfilter/nf_conntrack_l3proto.h index 6f7c13f..3bb89ea 100644 --- a/include/net/netfilter/nf_conntrack_l3proto.h +++ b/include/net/netfilter/nf_conntrack_l3proto.h @@ -76,11 +76,16 @@ struct nf_conntrack_l3proto { extern struct nf_conntrack_l3proto __rcu *nf_ct_l3protos[AF_MAX]; -/* Protocol registration. */ -extern int nf_conntrack_l3proto_register(struct net *net, +/* Protocol pernet registration. */ +extern int nf_ct_l3proto_pernet_register(struct net *net, struct nf_conntrack_l3proto *proto); -extern void nf_conntrack_l3proto_unregister(struct net *net, +extern void nf_ct_l3proto_pernet_unregister(struct net *net, struct nf_conntrack_l3proto *proto); + +/* Protocol global registration. */ +extern int nf_ct_l3proto_register(struct nf_conntrack_l3proto *proto); +extern void nf_ct_l3proto_unregister(struct nf_conntrack_l3proto *proto); + extern struct nf_conntrack_l3proto *nf_ct_l3proto_find_get(u_int16_t l3proto); extern void nf_ct_l3proto_put(struct nf_conntrack_l3proto *p); diff --git a/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c b/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c index fcdd0c2..76b84fc 100644 --- a/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c +++ b/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c @@ -438,10 +438,9 @@ static int ipv4_net_init(struct net *net) pr_err("nf_conntrack_l4proto_icmp4 :protocol register failed\n"); goto out_icmp; } - ret = nf_conntrack_l3proto_register(net, - &nf_conntrack_l3proto_ipv4); + ret = nf_ct_l3proto_pernet_register(net, &nf_conntrack_l3proto_ipv4); if (ret < 0) { - pr_err("nf_conntrack_l3proto_ipv4 :protocol register failed\n"); + pr_err("nf_conntrack_ipv4: pernet registration failed\n"); goto out_ipv4; } return 0; @@ -460,8 +459,7 @@ out_tcp: static void ipv4_net_exit(struct net *net) { - nf_conntrack_l3proto_unregister(net, - &nf_conntrack_l3proto_ipv4); + nf_ct_l3proto_pernet_unregister(net, &nf_conntrack_l3proto_ipv4); nf_conntrack_l4proto_unregister(net, &nf_conntrack_l4proto_icmp); nf_conntrack_l4proto_unregister(net, @@ -500,16 +498,25 @@ static int __init nf_conntrack_l3proto_ipv4_init(void) pr_err("nf_conntrack_ipv4: can't register hooks.\n"); goto cleanup_pernet; } + + ret = nf_ct_l3proto_register(&nf_conntrack_l3proto_ipv4); + if (ret < 0) { + pr_err("nf_conntrack_ipv4: can't register ipv4 proto.\n"); + goto cleanup_hooks; + } + #if defined(CONFIG_PROC_FS) && defined(CONFIG_NF_CONNTRACK_PROC_COMPAT) ret = nf_conntrack_ipv4_compat_init(); if (ret < 0) - goto cleanup_hooks; + goto cleanup_proto; #endif return ret; #if defined(CONFIG_PROC_FS) && defined(CONFIG_NF_CONNTRACK_PROC_COMPAT) + cleanup_proto: + nf_ct_l3proto_unregister(&nf_conntrack_l3proto_ipv4); +#endif cleanup_hooks: nf_unregister_hooks(ipv4_conntrack_ops, ARRAY_SIZE(ipv4_conntrack_ops)); -#endif cleanup_pernet: unregister_pernet_subsys(&ipv4_net_ops); cleanup_sockopt: @@ -523,6 +530,7 @@ static void __exit nf_conntrack_l3proto_ipv4_fini(void) #if defined(CONFIG_PROC_FS) && defined(CONFIG_NF_CONNTRACK_PROC_COMPAT) nf_conntrack_ipv4_compat_fini(); #endif + nf_ct_l3proto_unregister(&nf_conntrack_l3proto_ipv4); nf_unregister_hooks(ipv4_conntrack_ops, ARRAY_SIZE(ipv4_conntrack_ops)); unregister_pernet_subsys(&ipv4_net_ops); nf_unregister_sockopt(&so_getorigdst); diff --git a/net/ipv6/netfilter/nf_conntrack_l3proto_ipv6.c b/net/ipv6/netfilter/nf_conntrack_l3proto_ipv6.c index 137e245..3eaf6ba 100644 --- a/net/ipv6/netfilter/nf_conntrack_l3proto_ipv6.c +++ b/net/ipv6/netfilter/nf_conntrack_l3proto_ipv6.c @@ -439,10 +439,9 @@ static int ipv6_net_init(struct net *net) printk(KERN_ERR "nf_conntrack_l4proto_icmp6: protocol register failed\n"); goto cleanup_udp6; } - ret = nf_conntrack_l3proto_register(net, - &nf_conntrack_l3proto_ipv6); + ret = nf_ct_l3proto_pernet_register(net, &nf_conntrack_l3proto_ipv6); if (ret < 0) { - printk(KERN_ERR "nf_conntrack_l3proto_ipv6: protocol register failed\n"); + pr_err("nf_conntrack_ipv6: pernet registration failed.\n"); goto cleanup_icmpv6; } return 0; @@ -461,8 +460,7 @@ static int ipv6_net_init(struct net *net) static void ipv6_net_exit(struct net *net) { - nf_conntrack_l3proto_unregister(net, - &nf_conntrack_l3proto_ipv6); + nf_ct_l3proto_pernet_unregister(net, &nf_conntrack_l3proto_ipv6); nf_conntrack_l4proto_unregister(net, &nf_conntrack_l4proto_icmpv6); nf_conntrack_l4proto_unregister(net, @@ -491,19 +489,28 @@ static int __init nf_conntrack_l3proto_ipv6_init(void) ret = register_pernet_subsys(&ipv6_net_ops); if (ret < 0) - goto cleanup_pernet; + goto cleanup_sockopt; + ret = nf_register_hooks(ipv6_conntrack_ops, ARRAY_SIZE(ipv6_conntrack_ops)); if (ret < 0) { pr_err("nf_conntrack_ipv6: can't register pre-routing defrag " "hook.\n"); - goto cleanup_ipv6; + goto cleanup_pernet; + } + + ret = nf_ct_l3proto_register(&nf_conntrack_l3proto_ipv6); + if (ret < 0) { + pr_err("nf_conntrack_ipv6: can't register ipv6 proto.\n"); + goto cleanup_hooks; } return ret; - cleanup_ipv6: - unregister_pernet_subsys(&ipv6_net_ops); + cleanup_hooks: + nf_unregister_hooks(ipv6_conntrack_ops, ARRAY_SIZE(ipv6_conntrack_ops)); cleanup_pernet: + unregister_pernet_subsys(&ipv6_net_ops); + cleanup_sockopt: nf_unregister_sockopt(&so_getorigdst6); return ret; } @@ -511,6 +518,7 @@ static int __init nf_conntrack_l3proto_ipv6_init(void) static void __exit nf_conntrack_l3proto_ipv6_fini(void) { synchronize_net(); + nf_ct_l3proto_unregister(&nf_conntrack_l3proto_ipv6); nf_unregister_hooks(ipv6_conntrack_ops, ARRAY_SIZE(ipv6_conntrack_ops)); unregister_pernet_subsys(&ipv6_net_ops); nf_unregister_sockopt(&so_getorigdst6); diff --git a/net/netfilter/nf_conntrack_proto.c b/net/netfilter/nf_conntrack_proto.c index f0ec07c..076d827 100644 --- a/net/netfilter/nf_conntrack_proto.c +++ b/net/netfilter/nf_conntrack_proto.c @@ -212,8 +212,7 @@ static void nf_ct_l3proto_unregister_sysctl(struct net *net, #endif } -static int -nf_conntrack_l3proto_register_net(struct nf_conntrack_l3proto *proto) +int nf_ct_l3proto_register(struct nf_conntrack_l3proto *proto) { int ret = 0; struct nf_conntrack_l3proto *old; @@ -242,8 +241,9 @@ out_unlock: return ret; } +EXPORT_SYMBOL_GPL(nf_ct_l3proto_register); -int nf_conntrack_l3proto_register(struct net *net, +int nf_ct_l3proto_pernet_register(struct net *net, struct nf_conntrack_l3proto *proto) { int ret = 0; @@ -254,22 +254,11 @@ int nf_conntrack_l3proto_register(struct net *net, return ret; } - ret = nf_ct_l3proto_register_sysctl(net, proto); - if (ret < 0) - return ret; - - if (net == &init_net) { - ret = nf_conntrack_l3proto_register_net(proto); - if (ret < 0) - nf_ct_l3proto_unregister_sysctl(net, proto); - } - - return ret; + return nf_ct_l3proto_register_sysctl(net, proto); } -EXPORT_SYMBOL_GPL(nf_conntrack_l3proto_register); +EXPORT_SYMBOL_GPL(nf_ct_l3proto_pernet_register); -static void -nf_conntrack_l3proto_unregister_net(struct nf_conntrack_l3proto *proto) +void nf_ct_l3proto_unregister(struct nf_conntrack_l3proto *proto) { BUG_ON(proto->l3proto >= AF_MAX); @@ -283,19 +272,17 @@ nf_conntrack_l3proto_unregister_net(struct nf_conntrack_l3proto *proto) synchronize_rcu(); } +EXPORT_SYMBOL_GPL(nf_ct_l3proto_unregister); -void nf_conntrack_l3proto_unregister(struct net *net, +void nf_ct_l3proto_pernet_unregister(struct net *net, struct nf_conntrack_l3proto *proto) { - if (net == &init_net) - nf_conntrack_l3proto_unregister_net(proto); - nf_ct_l3proto_unregister_sysctl(net, proto); /* Remove all contrack entries for this protocol */ nf_ct_iterate_cleanup(net, kill_l3proto, proto); } -EXPORT_SYMBOL_GPL(nf_conntrack_l3proto_unregister); +EXPORT_SYMBOL_GPL(nf_ct_l3proto_pernet_unregister); static struct nf_proto_net *nf_ct_l4proto_net(struct net *net, struct nf_conntrack_l4proto *l4proto) -- cgit v0.10.2 From c296bb4d5d417d466c9bcc8afef68a3db5449a64 Mon Sep 17 00:00:00 2001 From: Gao feng Date: Wed, 23 Jan 2013 12:51:10 +0100 Subject: netfilter: nf_conntrack: refactor l4proto support for netns Move the code that register/unregister l4proto to the module_init/exit context. Given that we have to modify some interfaces to accomodate these changes, it is a good time to use shorter function names for this using the nf_ct_* prefix instead of nf_conntrack_*, that is: nf_ct_l4proto_register nf_ct_l4proto_pernet_register nf_ct_l4proto_unregister nf_ct_l4proto_pernet_unregister We same many line breaks with it. Signed-off-by: Gao feng Signed-off-by: Pablo Neira Ayuso diff --git a/include/net/netfilter/nf_conntrack_l4proto.h b/include/net/netfilter/nf_conntrack_l4proto.h index c3be4ae..914d8d9 100644 --- a/include/net/netfilter/nf_conntrack_l4proto.h +++ b/include/net/netfilter/nf_conntrack_l4proto.h @@ -121,12 +121,16 @@ extern struct nf_conntrack_l4proto * nf_ct_l4proto_find_get(u_int16_t l3proto, u_int8_t l4proto); extern void nf_ct_l4proto_put(struct nf_conntrack_l4proto *p); -/* Protocol registration. */ -extern int nf_conntrack_l4proto_register(struct net *net, +/* Protocol pernet registration. */ +extern int nf_ct_l4proto_pernet_register(struct net *net, struct nf_conntrack_l4proto *proto); -extern void nf_conntrack_l4proto_unregister(struct net *net, +extern void nf_ct_l4proto_pernet_unregister(struct net *net, struct nf_conntrack_l4proto *proto); +/* Protocol global registration. */ +extern int nf_ct_l4proto_register(struct nf_conntrack_l4proto *proto); +extern void nf_ct_l4proto_unregister(struct nf_conntrack_l4proto *proto); + static inline void nf_ct_kfree_compat_sysctl_table(struct nf_proto_net *pn) { #if defined(CONFIG_SYSCTL) && defined(CONFIG_NF_CONNTRACK_PROC_COMPAT) diff --git a/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c b/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c index 76b84fc..48990ad 100644 --- a/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c +++ b/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c @@ -420,22 +420,19 @@ static int ipv4_net_init(struct net *net) { int ret = 0; - ret = nf_conntrack_l4proto_register(net, - &nf_conntrack_l4proto_tcp4); + ret = nf_ct_l4proto_pernet_register(net, &nf_conntrack_l4proto_tcp4); if (ret < 0) { - pr_err("nf_conntrack_l4proto_tcp4 :protocol register failed\n"); + pr_err("nf_conntrack_tcp4: pernet registration failed\n"); goto out_tcp; } - ret = nf_conntrack_l4proto_register(net, - &nf_conntrack_l4proto_udp4); + ret = nf_ct_l4proto_pernet_register(net, &nf_conntrack_l4proto_udp4); if (ret < 0) { - pr_err("nf_conntrack_l4proto_udp4 :protocol register failed\n"); + pr_err("nf_conntrack_udp4: pernet registration failed\n"); goto out_udp; } - ret = nf_conntrack_l4proto_register(net, - &nf_conntrack_l4proto_icmp); + ret = nf_ct_l4proto_pernet_register(net, &nf_conntrack_l4proto_icmp); if (ret < 0) { - pr_err("nf_conntrack_l4proto_icmp4 :protocol register failed\n"); + pr_err("nf_conntrack_icmp4: pernet registration failed\n"); goto out_icmp; } ret = nf_ct_l3proto_pernet_register(net, &nf_conntrack_l3proto_ipv4); @@ -445,14 +442,11 @@ static int ipv4_net_init(struct net *net) } return 0; out_ipv4: - nf_conntrack_l4proto_unregister(net, - &nf_conntrack_l4proto_icmp); + nf_ct_l4proto_pernet_unregister(net, &nf_conntrack_l4proto_icmp); out_icmp: - nf_conntrack_l4proto_unregister(net, - &nf_conntrack_l4proto_udp4); + nf_ct_l4proto_pernet_unregister(net, &nf_conntrack_l4proto_udp4); out_udp: - nf_conntrack_l4proto_unregister(net, - &nf_conntrack_l4proto_tcp4); + nf_ct_l4proto_pernet_unregister(net, &nf_conntrack_l4proto_tcp4); out_tcp: return ret; } @@ -460,12 +454,9 @@ out_tcp: static void ipv4_net_exit(struct net *net) { nf_ct_l3proto_pernet_unregister(net, &nf_conntrack_l3proto_ipv4); - nf_conntrack_l4proto_unregister(net, - &nf_conntrack_l4proto_icmp); - nf_conntrack_l4proto_unregister(net, - &nf_conntrack_l4proto_udp4); - nf_conntrack_l4proto_unregister(net, - &nf_conntrack_l4proto_tcp4); + nf_ct_l4proto_pernet_unregister(net, &nf_conntrack_l4proto_icmp); + nf_ct_l4proto_pernet_unregister(net, &nf_conntrack_l4proto_udp4); + nf_ct_l4proto_pernet_unregister(net, &nf_conntrack_l4proto_tcp4); } static struct pernet_operations ipv4_net_ops = { @@ -499,10 +490,28 @@ static int __init nf_conntrack_l3proto_ipv4_init(void) goto cleanup_pernet; } + ret = nf_ct_l4proto_register(&nf_conntrack_l4proto_tcp4); + if (ret < 0) { + pr_err("nf_conntrack_ipv4: can't register tcp4 proto.\n"); + goto cleanup_hooks; + } + + ret = nf_ct_l4proto_register(&nf_conntrack_l4proto_udp4); + if (ret < 0) { + pr_err("nf_conntrack_ipv4: can't register udp4 proto.\n"); + goto cleanup_tcp4; + } + + ret = nf_ct_l4proto_register(&nf_conntrack_l4proto_icmp); + if (ret < 0) { + pr_err("nf_conntrack_ipv4: can't register icmpv4 proto.\n"); + goto cleanup_udp4; + } + ret = nf_ct_l3proto_register(&nf_conntrack_l3proto_ipv4); if (ret < 0) { pr_err("nf_conntrack_ipv4: can't register ipv4 proto.\n"); - goto cleanup_hooks; + goto cleanup_icmpv4; } #if defined(CONFIG_PROC_FS) && defined(CONFIG_NF_CONNTRACK_PROC_COMPAT) @@ -515,6 +524,12 @@ static int __init nf_conntrack_l3proto_ipv4_init(void) cleanup_proto: nf_ct_l3proto_unregister(&nf_conntrack_l3proto_ipv4); #endif + cleanup_icmpv4: + nf_ct_l4proto_unregister(&nf_conntrack_l4proto_icmp); + cleanup_udp4: + nf_ct_l4proto_unregister(&nf_conntrack_l4proto_udp4); + cleanup_tcp4: + nf_ct_l4proto_unregister(&nf_conntrack_l4proto_tcp4); cleanup_hooks: nf_unregister_hooks(ipv4_conntrack_ops, ARRAY_SIZE(ipv4_conntrack_ops)); cleanup_pernet: @@ -531,6 +546,9 @@ static void __exit nf_conntrack_l3proto_ipv4_fini(void) nf_conntrack_ipv4_compat_fini(); #endif nf_ct_l3proto_unregister(&nf_conntrack_l3proto_ipv4); + nf_ct_l4proto_unregister(&nf_conntrack_l4proto_icmp); + nf_ct_l4proto_unregister(&nf_conntrack_l4proto_udp4); + nf_ct_l4proto_unregister(&nf_conntrack_l4proto_tcp4); nf_unregister_hooks(ipv4_conntrack_ops, ARRAY_SIZE(ipv4_conntrack_ops)); unregister_pernet_subsys(&ipv4_net_ops); nf_unregister_sockopt(&so_getorigdst); diff --git a/net/ipv6/netfilter/nf_conntrack_l3proto_ipv6.c b/net/ipv6/netfilter/nf_conntrack_l3proto_ipv6.c index 3eaf6ba..8a45bb2 100644 --- a/net/ipv6/netfilter/nf_conntrack_l3proto_ipv6.c +++ b/net/ipv6/netfilter/nf_conntrack_l3proto_ipv6.c @@ -421,22 +421,19 @@ static int ipv6_net_init(struct net *net) { int ret = 0; - ret = nf_conntrack_l4proto_register(net, - &nf_conntrack_l4proto_tcp6); + ret = nf_ct_l4proto_pernet_register(net, &nf_conntrack_l4proto_tcp6); if (ret < 0) { - printk(KERN_ERR "nf_conntrack_l4proto_tcp6: protocol register failed\n"); + pr_err("nf_conntrack_tcp6: pernet registration failed\n"); goto out; } - ret = nf_conntrack_l4proto_register(net, - &nf_conntrack_l4proto_udp6); + ret = nf_ct_l4proto_pernet_register(net, &nf_conntrack_l4proto_udp6); if (ret < 0) { - printk(KERN_ERR "nf_conntrack_l4proto_udp6: protocol register failed\n"); + pr_err("nf_conntrack_udp6: pernet registration failed\n"); goto cleanup_tcp6; } - ret = nf_conntrack_l4proto_register(net, - &nf_conntrack_l4proto_icmpv6); + ret = nf_ct_l4proto_pernet_register(net, &nf_conntrack_l4proto_icmpv6); if (ret < 0) { - printk(KERN_ERR "nf_conntrack_l4proto_icmp6: protocol register failed\n"); + pr_err("nf_conntrack_icmp6: pernet registration failed\n"); goto cleanup_udp6; } ret = nf_ct_l3proto_pernet_register(net, &nf_conntrack_l3proto_ipv6); @@ -446,14 +443,11 @@ static int ipv6_net_init(struct net *net) } return 0; cleanup_icmpv6: - nf_conntrack_l4proto_unregister(net, - &nf_conntrack_l4proto_icmpv6); + nf_ct_l4proto_pernet_unregister(net, &nf_conntrack_l4proto_icmpv6); cleanup_udp6: - nf_conntrack_l4proto_unregister(net, - &nf_conntrack_l4proto_udp6); + nf_ct_l4proto_pernet_unregister(net, &nf_conntrack_l4proto_udp6); cleanup_tcp6: - nf_conntrack_l4proto_unregister(net, - &nf_conntrack_l4proto_tcp6); + nf_ct_l4proto_pernet_unregister(net, &nf_conntrack_l4proto_tcp6); out: return ret; } @@ -461,12 +455,9 @@ static int ipv6_net_init(struct net *net) static void ipv6_net_exit(struct net *net) { nf_ct_l3proto_pernet_unregister(net, &nf_conntrack_l3proto_ipv6); - nf_conntrack_l4proto_unregister(net, - &nf_conntrack_l4proto_icmpv6); - nf_conntrack_l4proto_unregister(net, - &nf_conntrack_l4proto_udp6); - nf_conntrack_l4proto_unregister(net, - &nf_conntrack_l4proto_tcp6); + nf_ct_l4proto_pernet_unregister(net, &nf_conntrack_l4proto_icmpv6); + nf_ct_l4proto_pernet_unregister(net, &nf_conntrack_l4proto_udp6); + nf_ct_l4proto_pernet_unregister(net, &nf_conntrack_l4proto_tcp6); } static struct pernet_operations ipv6_net_ops = { @@ -499,13 +490,37 @@ static int __init nf_conntrack_l3proto_ipv6_init(void) goto cleanup_pernet; } + ret = nf_ct_l4proto_register(&nf_conntrack_l4proto_tcp6); + if (ret < 0) { + pr_err("nf_conntrack_ipv6: can't register tcp6 proto.\n"); + goto cleanup_hooks; + } + + ret = nf_ct_l4proto_register(&nf_conntrack_l4proto_udp6); + if (ret < 0) { + pr_err("nf_conntrack_ipv6: can't register udp6 proto.\n"); + goto cleanup_tcp6; + } + + ret = nf_ct_l4proto_register(&nf_conntrack_l4proto_icmpv6); + if (ret < 0) { + pr_err("nf_conntrack_ipv6: can't register icmpv6 proto.\n"); + goto cleanup_udp6; + } + ret = nf_ct_l3proto_register(&nf_conntrack_l3proto_ipv6); if (ret < 0) { pr_err("nf_conntrack_ipv6: can't register ipv6 proto.\n"); - goto cleanup_hooks; + goto cleanup_icmpv6; } return ret; + cleanup_icmpv6: + nf_ct_l4proto_unregister(&nf_conntrack_l4proto_icmpv6); + cleanup_udp6: + nf_ct_l4proto_unregister(&nf_conntrack_l4proto_udp6); + cleanup_tcp6: + nf_ct_l4proto_unregister(&nf_conntrack_l4proto_tcp6); cleanup_hooks: nf_unregister_hooks(ipv6_conntrack_ops, ARRAY_SIZE(ipv6_conntrack_ops)); cleanup_pernet: @@ -519,6 +534,9 @@ static void __exit nf_conntrack_l3proto_ipv6_fini(void) { synchronize_net(); nf_ct_l3proto_unregister(&nf_conntrack_l3proto_ipv6); + nf_ct_l4proto_unregister(&nf_conntrack_l4proto_tcp6); + nf_ct_l4proto_unregister(&nf_conntrack_l4proto_udp6); + nf_ct_l4proto_unregister(&nf_conntrack_l4proto_icmpv6); nf_unregister_hooks(ipv6_conntrack_ops, ARRAY_SIZE(ipv6_conntrack_ops)); unregister_pernet_subsys(&ipv6_net_ops); nf_unregister_sockopt(&so_getorigdst6); diff --git a/net/netfilter/nf_conntrack_proto.c b/net/netfilter/nf_conntrack_proto.c index 076d827..58ab405 100644 --- a/net/netfilter/nf_conntrack_proto.c +++ b/net/netfilter/nf_conntrack_proto.c @@ -363,8 +363,7 @@ void nf_ct_l4proto_unregister_sysctl(struct net *net, /* FIXME: Allow NULL functions and sub in pointers to generic for them. --RR */ -static int -nf_conntrack_l4proto_register_net(struct nf_conntrack_l4proto *l4proto) +int nf_ct_l4proto_register(struct nf_conntrack_l4proto *l4proto) { int ret = 0; @@ -418,8 +417,9 @@ out_unlock: mutex_unlock(&nf_ct_proto_mutex); return ret; } +EXPORT_SYMBOL_GPL(nf_ct_l4proto_register); -int nf_conntrack_l4proto_register(struct net *net, +int nf_ct_l4proto_pernet_register(struct net *net, struct nf_conntrack_l4proto *l4proto) { int ret = 0; @@ -439,22 +439,13 @@ int nf_conntrack_l4proto_register(struct net *net, if (ret < 0) goto out; - if (net == &init_net) { - ret = nf_conntrack_l4proto_register_net(l4proto); - if (ret < 0) { - nf_ct_l4proto_unregister_sysctl(net, pn, l4proto); - goto out; - } - } - pn->users++; out: return ret; } -EXPORT_SYMBOL_GPL(nf_conntrack_l4proto_register); +EXPORT_SYMBOL_GPL(nf_ct_l4proto_pernet_register); -static void -nf_conntrack_l4proto_unregister_net(struct nf_conntrack_l4proto *l4proto) +void nf_ct_l4proto_unregister(struct nf_conntrack_l4proto *l4proto) { BUG_ON(l4proto->l3proto >= PF_MAX); @@ -469,15 +460,13 @@ nf_conntrack_l4proto_unregister_net(struct nf_conntrack_l4proto *l4proto) synchronize_rcu(); } +EXPORT_SYMBOL_GPL(nf_ct_l4proto_unregister); -void nf_conntrack_l4proto_unregister(struct net *net, +void nf_ct_l4proto_pernet_unregister(struct net *net, struct nf_conntrack_l4proto *l4proto) { struct nf_proto_net *pn = NULL; - if (net == &init_net) - nf_conntrack_l4proto_unregister_net(l4proto); - pn = nf_ct_l4proto_net(net, l4proto); if (pn == NULL) return; @@ -488,7 +477,7 @@ void nf_conntrack_l4proto_unregister(struct net *net, /* Remove all contrack entries for this protocol */ nf_ct_iterate_cleanup(net, kill_l4proto, l4proto); } -EXPORT_SYMBOL_GPL(nf_conntrack_l4proto_unregister); +EXPORT_SYMBOL_GPL(nf_ct_l4proto_pernet_unregister); int nf_conntrack_proto_pernet_init(struct net *net) { diff --git a/net/netfilter/nf_conntrack_proto_dccp.c b/net/netfilter/nf_conntrack_proto_dccp.c index a8ae287..432f957 100644 --- a/net/netfilter/nf_conntrack_proto_dccp.c +++ b/net/netfilter/nf_conntrack_proto_dccp.c @@ -935,32 +935,27 @@ static struct nf_conntrack_l4proto dccp_proto6 __read_mostly = { static __net_init int dccp_net_init(struct net *net) { int ret = 0; - ret = nf_conntrack_l4proto_register(net, - &dccp_proto4); + ret = nf_ct_l4proto_pernet_register(net, &dccp_proto4); if (ret < 0) { - pr_err("nf_conntrack_l4proto_dccp4 :protocol register failed.\n"); + pr_err("nf_conntrack_dccp4: pernet registration failed.\n"); goto out; } - ret = nf_conntrack_l4proto_register(net, - &dccp_proto6); + ret = nf_ct_l4proto_pernet_register(net, &dccp_proto6); if (ret < 0) { - pr_err("nf_conntrack_l4proto_dccp6 :protocol register failed.\n"); + pr_err("nf_conntrack_dccp6: pernet registration failed.\n"); goto cleanup_dccp4; } return 0; cleanup_dccp4: - nf_conntrack_l4proto_unregister(net, - &dccp_proto4); + nf_ct_l4proto_pernet_unregister(net, &dccp_proto4); out: return ret; } static __net_exit void dccp_net_exit(struct net *net) { - nf_conntrack_l4proto_unregister(net, - &dccp_proto6); - nf_conntrack_l4proto_unregister(net, - &dccp_proto4); + nf_ct_l4proto_pernet_unregister(net, &dccp_proto6); + nf_ct_l4proto_pernet_unregister(net, &dccp_proto4); } static struct pernet_operations dccp_net_ops = { @@ -972,11 +967,33 @@ static struct pernet_operations dccp_net_ops = { static int __init nf_conntrack_proto_dccp_init(void) { - return register_pernet_subsys(&dccp_net_ops); + int ret; + + ret = nf_ct_l4proto_register(&dccp_proto4); + if (ret < 0) + goto out_dccp4; + + ret = nf_ct_l4proto_register(&dccp_proto6); + if (ret < 0) + goto out_dccp6; + + ret = register_pernet_subsys(&dccp_net_ops); + if (ret < 0) + goto out_pernet; + + return 0; +out_pernet: + nf_ct_l4proto_unregister(&dccp_proto6); +out_dccp6: + nf_ct_l4proto_unregister(&dccp_proto4); +out_dccp4: + return ret; } static void __exit nf_conntrack_proto_dccp_fini(void) { + nf_ct_l4proto_unregister(&dccp_proto6); + nf_ct_l4proto_unregister(&dccp_proto4); unregister_pernet_subsys(&dccp_net_ops); } diff --git a/net/netfilter/nf_conntrack_proto_gre.c b/net/netfilter/nf_conntrack_proto_gre.c index b09b7af..bd7d01d 100644 --- a/net/netfilter/nf_conntrack_proto_gre.c +++ b/net/netfilter/nf_conntrack_proto_gre.c @@ -397,15 +397,15 @@ static struct nf_conntrack_l4proto nf_conntrack_l4proto_gre4 __read_mostly = { static int proto_gre_net_init(struct net *net) { int ret = 0; - ret = nf_conntrack_l4proto_register(net, &nf_conntrack_l4proto_gre4); + ret = nf_ct_l4proto_pernet_register(net, &nf_conntrack_l4proto_gre4); if (ret < 0) - pr_err("nf_conntrack_l4proto_gre4 :protocol register failed.\n"); + pr_err("nf_conntrack_gre4: pernet registration failed.\n"); return ret; } static void proto_gre_net_exit(struct net *net) { - nf_conntrack_l4proto_unregister(net, &nf_conntrack_l4proto_gre4); + nf_ct_l4proto_pernet_unregister(net, &nf_conntrack_l4proto_gre4); nf_ct_gre_keymap_flush(net); } @@ -418,11 +418,26 @@ static struct pernet_operations proto_gre_net_ops = { static int __init nf_ct_proto_gre_init(void) { - return register_pernet_subsys(&proto_gre_net_ops); + int ret; + + ret = nf_ct_l4proto_register(&nf_conntrack_l4proto_gre4); + if (ret < 0) + goto out_gre4; + + ret = register_pernet_subsys(&proto_gre_net_ops); + if (ret < 0) + goto out_pernet; + + return 0; +out_pernet: + nf_ct_l4proto_unregister(&nf_conntrack_l4proto_gre4); +out_gre4: + return ret; } static void __exit nf_ct_proto_gre_fini(void) { + nf_ct_l4proto_unregister(&nf_conntrack_l4proto_gre4); unregister_pernet_subsys(&proto_gre_net_ops); } diff --git a/net/netfilter/nf_conntrack_proto_sctp.c b/net/netfilter/nf_conntrack_proto_sctp.c index c746d61..480f616 100644 --- a/net/netfilter/nf_conntrack_proto_sctp.c +++ b/net/netfilter/nf_conntrack_proto_sctp.c @@ -853,33 +853,28 @@ static int sctp_net_init(struct net *net) { int ret = 0; - ret = nf_conntrack_l4proto_register(net, - &nf_conntrack_l4proto_sctp4); + ret = nf_ct_l4proto_pernet_register(net, &nf_conntrack_l4proto_sctp4); if (ret < 0) { - pr_err("nf_conntrack_l4proto_sctp4 :protocol register failed.\n"); + pr_err("nf_conntrack_sctp4: pernet registration failed.\n"); goto out; } - ret = nf_conntrack_l4proto_register(net, - &nf_conntrack_l4proto_sctp6); + ret = nf_ct_l4proto_pernet_register(net, &nf_conntrack_l4proto_sctp6); if (ret < 0) { - pr_err("nf_conntrack_l4proto_sctp6 :protocol register failed.\n"); + pr_err("nf_conntrack_sctp6: pernet registration failed.\n"); goto cleanup_sctp4; } return 0; cleanup_sctp4: - nf_conntrack_l4proto_unregister(net, - &nf_conntrack_l4proto_sctp4); + nf_ct_l4proto_pernet_unregister(net, &nf_conntrack_l4proto_sctp4); out: return ret; } static void sctp_net_exit(struct net *net) { - nf_conntrack_l4proto_unregister(net, - &nf_conntrack_l4proto_sctp6); - nf_conntrack_l4proto_unregister(net, - &nf_conntrack_l4proto_sctp4); + nf_ct_l4proto_pernet_unregister(net, &nf_conntrack_l4proto_sctp6); + nf_ct_l4proto_pernet_unregister(net, &nf_conntrack_l4proto_sctp4); } static struct pernet_operations sctp_net_ops = { @@ -891,11 +886,33 @@ static struct pernet_operations sctp_net_ops = { static int __init nf_conntrack_proto_sctp_init(void) { - return register_pernet_subsys(&sctp_net_ops); + int ret; + + ret = nf_ct_l4proto_register(&nf_conntrack_l4proto_sctp4); + if (ret < 0) + goto out_sctp4; + + ret = nf_ct_l4proto_register(&nf_conntrack_l4proto_sctp6); + if (ret < 0) + goto out_sctp6; + + ret = register_pernet_subsys(&sctp_net_ops); + if (ret < 0) + goto out_pernet; + + return 0; +out_pernet: + nf_ct_l4proto_unregister(&nf_conntrack_l4proto_sctp6); +out_sctp6: + nf_ct_l4proto_unregister(&nf_conntrack_l4proto_sctp4); +out_sctp4: + return ret; } static void __exit nf_conntrack_proto_sctp_fini(void) { + nf_ct_l4proto_unregister(&nf_conntrack_l4proto_sctp6); + nf_ct_l4proto_unregister(&nf_conntrack_l4proto_sctp4); unregister_pernet_subsys(&sctp_net_ops); } diff --git a/net/netfilter/nf_conntrack_proto_udplite.c b/net/netfilter/nf_conntrack_proto_udplite.c index 4b66df2..1574895 100644 --- a/net/netfilter/nf_conntrack_proto_udplite.c +++ b/net/netfilter/nf_conntrack_proto_udplite.c @@ -336,30 +336,28 @@ static int udplite_net_init(struct net *net) { int ret = 0; - ret = nf_conntrack_l4proto_register(net, - &nf_conntrack_l4proto_udplite4); + ret = nf_ct_l4proto_pernet_register(net, &nf_conntrack_l4proto_udplite4); if (ret < 0) { - pr_err("nf_conntrack_l4proto_udplite4 :protocol register failed.\n"); + pr_err("nf_conntrack_udplite4: pernet registration failed.\n"); goto out; } - ret = nf_conntrack_l4proto_register(net, - &nf_conntrack_l4proto_udplite6); + ret = nf_ct_l4proto_pernet_register(net, &nf_conntrack_l4proto_udplite6); if (ret < 0) { - pr_err("nf_conntrack_l4proto_udplite4 :protocol register failed.\n"); + pr_err("nf_conntrack_udplite6: pernet registration failed.\n"); goto cleanup_udplite4; } return 0; cleanup_udplite4: - nf_conntrack_l4proto_unregister(net, &nf_conntrack_l4proto_udplite4); + nf_ct_l4proto_pernet_unregister(net, &nf_conntrack_l4proto_udplite4); out: return ret; } static void udplite_net_exit(struct net *net) { - nf_conntrack_l4proto_unregister(net, &nf_conntrack_l4proto_udplite6); - nf_conntrack_l4proto_unregister(net, &nf_conntrack_l4proto_udplite4); + nf_ct_l4proto_pernet_unregister(net, &nf_conntrack_l4proto_udplite6); + nf_ct_l4proto_pernet_unregister(net, &nf_conntrack_l4proto_udplite4); } static struct pernet_operations udplite_net_ops = { @@ -371,11 +369,33 @@ static struct pernet_operations udplite_net_ops = { static int __init nf_conntrack_proto_udplite_init(void) { - return register_pernet_subsys(&udplite_net_ops); + int ret; + + ret = nf_ct_l4proto_register(&nf_conntrack_l4proto_udplite4); + if (ret < 0) + goto out_udplite4; + + ret = nf_ct_l4proto_register(&nf_conntrack_l4proto_udplite6); + if (ret < 0) + goto out_udplite6; + + ret = register_pernet_subsys(&udplite_net_ops); + if (ret < 0) + goto out_pernet; + + return 0; +out_pernet: + nf_ct_l4proto_unregister(&nf_conntrack_l4proto_udplite6); +out_udplite6: + nf_ct_l4proto_unregister(&nf_conntrack_l4proto_udplite4); +out_udplite4: + return ret; } static void __exit nf_conntrack_proto_udplite_exit(void) { + nf_ct_l4proto_unregister(&nf_conntrack_l4proto_udplite6); + nf_ct_l4proto_unregister(&nf_conntrack_l4proto_udplite4); unregister_pernet_subsys(&udplite_net_ops); } -- cgit v0.10.2 From 5f9f946b39bff31bc9a4a8be18cef3354d3382ae Mon Sep 17 00:00:00 2001 From: Pablo Neira Ayuso Date: Wed, 23 Jan 2013 15:12:25 +0100 Subject: netfilter: nf_conntrack: fix compilation if sysctl are disabled In (f94161c netfilter: nf_conntrack: move initialization out of pernet operations), some ifdefs were missing for sysctl dependent code. Reported-by: kbuild test robot Signed-off-by: Pablo Neira Ayuso diff --git a/net/netfilter/nf_conntrack_standalone.c b/net/netfilter/nf_conntrack_standalone.c index 725bf04..7936bf7 100644 --- a/net/netfilter/nf_conntrack_standalone.c +++ b/net/netfilter/nf_conntrack_standalone.c @@ -563,10 +563,14 @@ static int __init nf_conntrack_standalone_init(void) if (ret < 0) goto out_start; +#ifdef CONFIG_SYSCTL nf_ct_netfilter_header = register_net_sysctl(&init_net, "net", nf_ct_netfilter_table); - if (!nf_ct_netfilter_header) + if (!nf_ct_netfilter_header) { + pr_err("nf_conntrack: can't register to sysctl.\n"); goto out_sysctl; + } +#endif ret = register_pernet_subsys(&nf_conntrack_net_ops); if (ret < 0) @@ -576,9 +580,10 @@ static int __init nf_conntrack_standalone_init(void) return 0; out_pernet: +#ifdef CONFIG_SYSCTL unregister_net_sysctl_table(nf_ct_netfilter_header); out_sysctl: - pr_err("nf_conntrack: can't register to sysctl.\n"); +#endif nf_conntrack_cleanup_end(); out_start: return ret; @@ -588,7 +593,9 @@ static void __exit nf_conntrack_standalone_fini(void) { nf_conntrack_cleanup_start(); unregister_pernet_subsys(&nf_conntrack_net_ops); +#ifdef CONFIG_SYSCTL unregister_net_sysctl_table(nf_ct_netfilter_header); +#endif nf_conntrack_cleanup_end(); } -- cgit v0.10.2