From adf0516845bcd0e626323c858ece28ee58c74455 Mon Sep 17 00:00:00 2001 From: Pablo Neira Ayuso Date: Fri, 12 Aug 2016 13:47:06 +0200 Subject: netfilter: remove ip_conntrack* sysctl compat code This backward compatibility has been around for more than ten years, since Yasuyuki Kozakai introduced IPv6 in conntrack. These days, we have alternate /proc/net/nf_conntrack* entries, the ctnetlink interface and the conntrack utility got adopted by many people in the user community according to what I observed on the netfilter user mailing list. So let's get rid of this. Note that nf_conntrack_htable_size and unsigned int nf_conntrack_max do not need to be exported as symbol anymore. Signed-off-by: Pablo Neira Ayuso --- net/ipv4/netfilter/Kconfig | 11 - net/ipv4/netfilter/Makefile | 5 - net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c | 70 --- .../netfilter/nf_conntrack_l3proto_ipv4_compat.c | 491 --------------------- net/ipv4/netfilter/nf_conntrack_proto_icmp.c | 39 +- 5 files changed, 1 insertion(+), 615 deletions(-) delete mode 100644 net/ipv4/netfilter/nf_conntrack_l3proto_ipv4_compat.c (limited to 'net/ipv4/netfilter') diff --git a/net/ipv4/netfilter/Kconfig b/net/ipv4/netfilter/Kconfig index c187c60e3e0c..d613309e3e5d 100644 --- a/net/ipv4/netfilter/Kconfig +++ b/net/ipv4/netfilter/Kconfig @@ -25,17 +25,6 @@ config NF_CONNTRACK_IPV4 To compile it as a module, choose M here. If unsure, say N. -config NF_CONNTRACK_PROC_COMPAT - bool "proc/sysctl compatibility with old connection tracking" - depends on NF_CONNTRACK_PROCFS && NF_CONNTRACK_IPV4 - default y - help - This option enables /proc and sysctl compatibility with the old - layer 3 dependent connection tracking. This is needed to keep - old programs that have not been adapted to the new names working. - - If unsure, say Y. - if NF_TABLES config NF_TABLES_IPV4 diff --git a/net/ipv4/netfilter/Makefile b/net/ipv4/netfilter/Makefile index 87b073da14c9..853328f8fd05 100644 --- a/net/ipv4/netfilter/Makefile +++ b/net/ipv4/netfilter/Makefile @@ -4,11 +4,6 @@ # objects for l3 independent conntrack nf_conntrack_ipv4-y := nf_conntrack_l3proto_ipv4.o nf_conntrack_proto_icmp.o -ifeq ($(CONFIG_NF_CONNTRACK_PROC_COMPAT),y) -ifeq ($(CONFIG_PROC_FS),y) -nf_conntrack_ipv4-objs += nf_conntrack_l3proto_ipv4_compat.o -endif -endif # connection tracking obj-$(CONFIG_NF_CONNTRACK_IPV4) += nf_conntrack_ipv4.o diff --git a/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c b/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c index ae1a71a97132..870aebda2932 100644 --- a/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c +++ b/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c @@ -202,47 +202,6 @@ static struct nf_hook_ops ipv4_conntrack_ops[] __read_mostly = { }, }; -#if defined(CONFIG_SYSCTL) && defined(CONFIG_NF_CONNTRACK_PROC_COMPAT) -static int log_invalid_proto_min = 0; -static int log_invalid_proto_max = 255; - -static struct ctl_table ip_ct_sysctl_table[] = { - { - .procname = "ip_conntrack_max", - .maxlen = sizeof(int), - .mode = 0644, - .proc_handler = proc_dointvec, - }, - { - .procname = "ip_conntrack_count", - .maxlen = sizeof(int), - .mode = 0444, - .proc_handler = proc_dointvec, - }, - { - .procname = "ip_conntrack_buckets", - .maxlen = sizeof(unsigned int), - .mode = 0444, - .proc_handler = proc_dointvec, - }, - { - .procname = "ip_conntrack_checksum", - .maxlen = sizeof(int), - .mode = 0644, - .proc_handler = proc_dointvec, - }, - { - .procname = "ip_conntrack_log_invalid", - .maxlen = sizeof(unsigned int), - .mode = 0644, - .proc_handler = proc_dointvec_minmax, - .extra1 = &log_invalid_proto_min, - .extra2 = &log_invalid_proto_max, - }, - { } -}; -#endif /* CONFIG_SYSCTL && CONFIG_NF_CONNTRACK_PROC_COMPAT */ - /* Fast function for those who don't want to parse /proc (and I don't blame them). */ /* Reversing the socket's dst/src point of view gives us the reply @@ -350,20 +309,6 @@ static struct nf_sockopt_ops so_getorigdst = { static int ipv4_init_net(struct net *net) { -#if defined(CONFIG_SYSCTL) && defined(CONFIG_NF_CONNTRACK_PROC_COMPAT) - struct nf_ip_net *in = &net->ct.nf_ct_proto; - in->ctl_table = kmemdup(ip_ct_sysctl_table, - sizeof(ip_ct_sysctl_table), - GFP_KERNEL); - if (!in->ctl_table) - return -ENOMEM; - - in->ctl_table[0].data = &nf_conntrack_max; - in->ctl_table[1].data = &net->ct.count; - in->ctl_table[2].data = &nf_conntrack_htable_size; - in->ctl_table[3].data = &net->ct.sysctl_checksum; - in->ctl_table[4].data = &net->ct.sysctl_log_invalid; -#endif return 0; } @@ -379,9 +324,6 @@ struct nf_conntrack_l3proto nf_conntrack_l3proto_ipv4 __read_mostly = { .nlattr_tuple_size = ipv4_nlattr_tuple_size, .nlattr_to_tuple = ipv4_nlattr_to_tuple, .nla_policy = ipv4_nla_policy, -#endif -#if defined(CONFIG_SYSCTL) && defined(CONFIG_NF_CONNTRACK_PROC_COMPAT) - .ctl_table_path = "net/ipv4/netfilter", #endif .init_net = ipv4_init_net, .me = THIS_MODULE, @@ -492,16 +434,7 @@ static int __init nf_conntrack_l3proto_ipv4_init(void) goto cleanup_icmpv4; } -#if defined(CONFIG_PROC_FS) && defined(CONFIG_NF_CONNTRACK_PROC_COMPAT) - ret = nf_conntrack_ipv4_compat_init(); - if (ret < 0) - 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_icmpv4: nf_ct_l4proto_unregister(&nf_conntrack_l4proto_icmp); cleanup_udp4: @@ -520,9 +453,6 @@ static int __init nf_conntrack_l3proto_ipv4_init(void) static void __exit nf_conntrack_l3proto_ipv4_fini(void) { synchronize_net(); -#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_ct_l4proto_unregister(&nf_conntrack_l4proto_icmp); nf_ct_l4proto_unregister(&nf_conntrack_l4proto_udp4); diff --git a/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4_compat.c b/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4_compat.c deleted file mode 100644 index 67bfc69e00bc..000000000000 --- a/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4_compat.c +++ /dev/null @@ -1,491 +0,0 @@ -/* ip_conntrack proc compat - based on ip_conntrack_standalone.c - * - * (C) 1999-2001 Paul `Rusty' Russell - * (C) 2002-2006 Netfilter Core Team - * (C) 2006-2010 Patrick McHardy - * - * 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 -#include -#include -#include -#include -#include -#include - -struct ct_iter_state { - struct seq_net_private p; - struct hlist_nulls_head *hash; - unsigned int htable_size; - unsigned int bucket; -}; - -static struct hlist_nulls_node *ct_get_first(struct seq_file *seq) -{ - struct ct_iter_state *st = seq->private; - struct hlist_nulls_node *n; - - for (st->bucket = 0; - st->bucket < st->htable_size; - st->bucket++) { - n = rcu_dereference( - hlist_nulls_first_rcu(&st->hash[st->bucket])); - if (!is_a_nulls(n)) - return n; - } - return NULL; -} - -static struct hlist_nulls_node *ct_get_next(struct seq_file *seq, - struct hlist_nulls_node *head) -{ - struct ct_iter_state *st = seq->private; - - head = rcu_dereference(hlist_nulls_next_rcu(head)); - while (is_a_nulls(head)) { - if (likely(get_nulls_value(head) == st->bucket)) { - if (++st->bucket >= st->htable_size) - return NULL; - } - head = rcu_dereference( - hlist_nulls_first_rcu(&st->hash[st->bucket])); - } - return head; -} - -static struct hlist_nulls_node *ct_get_idx(struct seq_file *seq, loff_t pos) -{ - struct hlist_nulls_node *head = ct_get_first(seq); - - if (head) - while (pos && (head = ct_get_next(seq, head))) - pos--; - return pos ? NULL : head; -} - -static void *ct_seq_start(struct seq_file *seq, loff_t *pos) - __acquires(RCU) -{ - struct ct_iter_state *st = seq->private; - - rcu_read_lock(); - - nf_conntrack_get_ht(&st->hash, &st->htable_size); - return ct_get_idx(seq, *pos); -} - -static void *ct_seq_next(struct seq_file *s, void *v, loff_t *pos) -{ - (*pos)++; - return ct_get_next(s, v); -} - -static void ct_seq_stop(struct seq_file *s, void *v) - __releases(RCU) -{ - rcu_read_unlock(); -} - -#ifdef CONFIG_NF_CONNTRACK_SECMARK -static void ct_show_secctx(struct seq_file *s, const struct nf_conn *ct) -{ - int ret; - u32 len; - char *secctx; - - ret = security_secid_to_secctx(ct->secmark, &secctx, &len); - if (ret) - return; - - seq_printf(s, "secctx=%s ", secctx); - - security_release_secctx(secctx, len); -} -#else -static inline void ct_show_secctx(struct seq_file *s, const struct nf_conn *ct) -{ -} -#endif - -static bool ct_seq_should_skip(const struct nf_conn *ct, - const struct net *net, - const struct nf_conntrack_tuple_hash *hash) -{ - /* we only want to print DIR_ORIGINAL */ - if (NF_CT_DIRECTION(hash)) - return true; - - if (nf_ct_l3num(ct) != AF_INET) - return true; - - if (!net_eq(nf_ct_net(ct), net)) - return true; - - return false; -} - -static int ct_seq_show(struct seq_file *s, void *v) -{ - struct nf_conntrack_tuple_hash *hash = v; - struct nf_conn *ct = nf_ct_tuplehash_to_ctrack(hash); - const struct nf_conntrack_l3proto *l3proto; - const struct nf_conntrack_l4proto *l4proto; - int ret = 0; - - NF_CT_ASSERT(ct); - if (ct_seq_should_skip(ct, seq_file_net(s), hash)) - return 0; - - if (unlikely(!atomic_inc_not_zero(&ct->ct_general.use))) - return 0; - - /* check if we raced w. object reuse */ - if (!nf_ct_is_confirmed(ct) || - ct_seq_should_skip(ct, seq_file_net(s), hash)) - goto release; - - l3proto = __nf_ct_l3proto_find(nf_ct_l3num(ct)); - NF_CT_ASSERT(l3proto); - l4proto = __nf_ct_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct)); - NF_CT_ASSERT(l4proto); - - ret = -ENOSPC; - seq_printf(s, "%-8s %u %ld ", - l4proto->name, nf_ct_protonum(ct), - nf_ct_expires(ct) / HZ); - - if (l4proto->print_conntrack) - l4proto->print_conntrack(s, ct); - - if (seq_has_overflowed(s)) - goto release; - - print_tuple(s, &ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple, - l3proto, l4proto); - - if (seq_has_overflowed(s)) - goto release; - - if (seq_print_acct(s, ct, IP_CT_DIR_ORIGINAL)) - goto release; - - if (!(test_bit(IPS_SEEN_REPLY_BIT, &ct->status))) - seq_printf(s, "[UNREPLIED] "); - - print_tuple(s, &ct->tuplehash[IP_CT_DIR_REPLY].tuple, - l3proto, l4proto); - - if (seq_has_overflowed(s)) - goto release; - - if (seq_print_acct(s, ct, IP_CT_DIR_REPLY)) - goto release; - - if (test_bit(IPS_ASSURED_BIT, &ct->status)) - seq_printf(s, "[ASSURED] "); - -#ifdef CONFIG_NF_CONNTRACK_MARK - seq_printf(s, "mark=%u ", ct->mark); -#endif - - ct_show_secctx(s, ct); - - seq_printf(s, "use=%u\n", atomic_read(&ct->ct_general.use)); - - if (seq_has_overflowed(s)) - goto release; - - ret = 0; -release: - nf_ct_put(ct); - return ret; -} - -static const struct seq_operations ct_seq_ops = { - .start = ct_seq_start, - .next = ct_seq_next, - .stop = ct_seq_stop, - .show = ct_seq_show -}; - -static int ct_open(struct inode *inode, struct file *file) -{ - return seq_open_net(inode, file, &ct_seq_ops, - sizeof(struct ct_iter_state)); -} - -static const struct file_operations ct_file_ops = { - .owner = THIS_MODULE, - .open = ct_open, - .read = seq_read, - .llseek = seq_lseek, - .release = seq_release_net, -}; - -/* expects */ -struct ct_expect_iter_state { - struct seq_net_private p; - unsigned int bucket; -}; - -static struct hlist_node *ct_expect_get_first(struct seq_file *seq) -{ - struct ct_expect_iter_state *st = seq->private; - struct hlist_node *n; - - for (st->bucket = 0; st->bucket < nf_ct_expect_hsize; st->bucket++) { - n = rcu_dereference( - hlist_first_rcu(&nf_ct_expect_hash[st->bucket])); - if (n) - return n; - } - return NULL; -} - -static struct hlist_node *ct_expect_get_next(struct seq_file *seq, - struct hlist_node *head) -{ - struct ct_expect_iter_state *st = seq->private; - - head = rcu_dereference(hlist_next_rcu(head)); - while (head == NULL) { - if (++st->bucket >= nf_ct_expect_hsize) - return NULL; - head = rcu_dereference( - hlist_first_rcu(&nf_ct_expect_hash[st->bucket])); - } - return head; -} - -static struct hlist_node *ct_expect_get_idx(struct seq_file *seq, loff_t pos) -{ - struct hlist_node *head = ct_expect_get_first(seq); - - if (head) - while (pos && (head = ct_expect_get_next(seq, head))) - pos--; - return pos ? NULL : head; -} - -static void *exp_seq_start(struct seq_file *seq, loff_t *pos) - __acquires(RCU) -{ - rcu_read_lock(); - return ct_expect_get_idx(seq, *pos); -} - -static void *exp_seq_next(struct seq_file *seq, void *v, loff_t *pos) -{ - (*pos)++; - return ct_expect_get_next(seq, v); -} - -static void exp_seq_stop(struct seq_file *seq, void *v) - __releases(RCU) -{ - rcu_read_unlock(); -} - -static int exp_seq_show(struct seq_file *s, void *v) -{ - struct nf_conntrack_expect *exp; - const struct hlist_node *n = v; - - exp = hlist_entry(n, struct nf_conntrack_expect, hnode); - - if (!net_eq(nf_ct_net(exp->master), seq_file_net(s))) - return 0; - - if (exp->tuple.src.l3num != AF_INET) - return 0; - - if (exp->timeout.function) - seq_printf(s, "%ld ", timer_pending(&exp->timeout) - ? (long)(exp->timeout.expires - jiffies)/HZ : 0); - else - seq_printf(s, "- "); - - seq_printf(s, "proto=%u ", exp->tuple.dst.protonum); - - print_tuple(s, &exp->tuple, - __nf_ct_l3proto_find(exp->tuple.src.l3num), - __nf_ct_l4proto_find(exp->tuple.src.l3num, - exp->tuple.dst.protonum)); - seq_putc(s, '\n'); - - return 0; -} - -static const struct seq_operations exp_seq_ops = { - .start = exp_seq_start, - .next = exp_seq_next, - .stop = exp_seq_stop, - .show = exp_seq_show -}; - -static int exp_open(struct inode *inode, struct file *file) -{ - return seq_open_net(inode, file, &exp_seq_ops, - sizeof(struct ct_expect_iter_state)); -} - -static const struct file_operations ip_exp_file_ops = { - .owner = THIS_MODULE, - .open = exp_open, - .read = seq_read, - .llseek = seq_lseek, - .release = seq_release_net, -}; - -static void *ct_cpu_seq_start(struct seq_file *seq, loff_t *pos) -{ - struct net *net = seq_file_net(seq); - int cpu; - - if (*pos == 0) - return SEQ_START_TOKEN; - - for (cpu = *pos-1; cpu < nr_cpu_ids; ++cpu) { - if (!cpu_possible(cpu)) - continue; - *pos = cpu+1; - return per_cpu_ptr(net->ct.stat, cpu); - } - - return NULL; -} - -static void *ct_cpu_seq_next(struct seq_file *seq, void *v, loff_t *pos) -{ - struct net *net = seq_file_net(seq); - int cpu; - - for (cpu = *pos; cpu < nr_cpu_ids; ++cpu) { - if (!cpu_possible(cpu)) - continue; - *pos = cpu+1; - return per_cpu_ptr(net->ct.stat, cpu); - } - - return NULL; -} - -static void ct_cpu_seq_stop(struct seq_file *seq, void *v) -{ -} - -static int ct_cpu_seq_show(struct seq_file *seq, void *v) -{ - struct net *net = seq_file_net(seq); - unsigned int nr_conntracks = atomic_read(&net->ct.count); - const struct ip_conntrack_stat *st = v; - - if (v == SEQ_START_TOKEN) { - seq_printf(seq, "entries searched found new invalid ignore delete delete_list insert insert_failed drop early_drop icmp_error expect_new expect_create expect_delete search_restart\n"); - return 0; - } - - seq_printf(seq, "%08x %08x %08x %08x %08x %08x %08x %08x " - "%08x %08x %08x %08x %08x %08x %08x %08x %08x\n", - nr_conntracks, - st->searched, - st->found, - st->new, - st->invalid, - st->ignore, - st->delete, - st->delete_list, - st->insert, - st->insert_failed, - st->drop, - st->early_drop, - st->error, - - st->expect_new, - st->expect_create, - st->expect_delete, - st->search_restart - ); - return 0; -} - -static const struct seq_operations ct_cpu_seq_ops = { - .start = ct_cpu_seq_start, - .next = ct_cpu_seq_next, - .stop = ct_cpu_seq_stop, - .show = ct_cpu_seq_show, -}; - -static int ct_cpu_seq_open(struct inode *inode, struct file *file) -{ - return seq_open_net(inode, file, &ct_cpu_seq_ops, - sizeof(struct seq_net_private)); -} - -static const struct file_operations ct_cpu_seq_fops = { - .owner = THIS_MODULE, - .open = ct_cpu_seq_open, - .read = seq_read, - .llseek = seq_lseek, - .release = seq_release_net, -}; - -static int __net_init ip_conntrack_net_init(struct net *net) -{ - struct proc_dir_entry *proc, *proc_exp, *proc_stat; - - proc = proc_create("ip_conntrack", 0440, net->proc_net, &ct_file_ops); - if (!proc) - goto err1; - - proc_exp = proc_create("ip_conntrack_expect", 0440, net->proc_net, - &ip_exp_file_ops); - if (!proc_exp) - goto err2; - - proc_stat = proc_create("ip_conntrack", S_IRUGO, - net->proc_net_stat, &ct_cpu_seq_fops); - if (!proc_stat) - goto err3; - return 0; - -err3: - remove_proc_entry("ip_conntrack_expect", net->proc_net); -err2: - remove_proc_entry("ip_conntrack", net->proc_net); -err1: - return -ENOMEM; -} - -static void __net_exit ip_conntrack_net_exit(struct net *net) -{ - remove_proc_entry("ip_conntrack", net->proc_net_stat); - remove_proc_entry("ip_conntrack_expect", net->proc_net); - remove_proc_entry("ip_conntrack", net->proc_net); -} - -static struct pernet_operations ip_conntrack_net_ops = { - .init = ip_conntrack_net_init, - .exit = ip_conntrack_net_exit, -}; - -int __init nf_conntrack_ipv4_compat_init(void) -{ - return register_pernet_subsys(&ip_conntrack_net_ops); -} - -void __exit nf_conntrack_ipv4_compat_fini(void) -{ - unregister_pernet_subsys(&ip_conntrack_net_ops); -} diff --git a/net/ipv4/netfilter/nf_conntrack_proto_icmp.c b/net/ipv4/netfilter/nf_conntrack_proto_icmp.c index c567e1b5d799..4b5904bc2614 100644 --- a/net/ipv4/netfilter/nf_conntrack_proto_icmp.c +++ b/net/ipv4/netfilter/nf_conntrack_proto_icmp.c @@ -327,17 +327,6 @@ static struct ctl_table icmp_sysctl_table[] = { }, { } }; -#ifdef CONFIG_NF_CONNTRACK_PROC_COMPAT -static struct ctl_table icmp_compat_sysctl_table[] = { - { - .procname = "ip_conntrack_icmp_timeout", - .maxlen = sizeof(unsigned int), - .mode = 0644, - .proc_handler = proc_dointvec_jiffies, - }, - { } -}; -#endif /* CONFIG_NF_CONNTRACK_PROC_COMPAT */ #endif /* CONFIG_SYSCTL */ static int icmp_kmemdup_sysctl_table(struct nf_proto_net *pn, @@ -355,40 +344,14 @@ static int icmp_kmemdup_sysctl_table(struct nf_proto_net *pn, return 0; } -static int icmp_kmemdup_compat_sysctl_table(struct nf_proto_net *pn, - struct nf_icmp_net *in) -{ -#ifdef CONFIG_SYSCTL -#ifdef CONFIG_NF_CONNTRACK_PROC_COMPAT - pn->ctl_compat_table = kmemdup(icmp_compat_sysctl_table, - sizeof(icmp_compat_sysctl_table), - GFP_KERNEL); - if (!pn->ctl_compat_table) - return -ENOMEM; - - pn->ctl_compat_table[0].data = &in->timeout; -#endif -#endif - return 0; -} - static int icmp_init_net(struct net *net, u_int16_t proto) { - int ret; struct nf_icmp_net *in = icmp_pernet(net); struct nf_proto_net *pn = &in->pn; in->timeout = nf_ct_icmp_timeout; - ret = icmp_kmemdup_compat_sysctl_table(pn, in); - if (ret < 0) - return ret; - - ret = icmp_kmemdup_sysctl_table(pn, in); - if (ret < 0) - nf_ct_kfree_compat_sysctl_table(pn); - - return ret; + return icmp_kmemdup_sysctl_table(pn, in); } static struct nf_proto_net *icmp_get_net_proto(struct net *net) -- cgit v1.2.3