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- /* ip_conntrack proc compat - based on ip_conntrack_standalone.c
- *
- * (C) 1999-2001 Paul `Rusty' Russell
- * (C) 2002-2006 Netfilter Core Team <coreteam@netfilter.org>
- * (C) 2006-2010 Patrick McHardy <kaber@trash.net>
- *
- * 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 <linux/types.h>
- #include <linux/proc_fs.h>
- #include <linux/seq_file.h>
- #include <linux/percpu.h>
- #include <linux/security.h>
- #include <net/net_namespace.h>
- #include <linux/netfilter.h>
- #include <net/netfilter/nf_conntrack_core.h>
- #include <net/netfilter/nf_conntrack_l3proto.h>
- #include <net/netfilter/nf_conntrack_l4proto.h>
- #include <net/netfilter/nf_conntrack_expect.h>
- #include <net/netfilter/nf_conntrack_acct.h>
- #include <linux/rculist_nulls.h>
- #include <linux/export.h>
- struct ct_iter_state {
- struct seq_net_private p;
- unsigned int bucket;
- };
- static struct hlist_nulls_node *ct_get_first(struct seq_file *seq)
- {
- struct net *net = seq_file_net(seq);
- struct ct_iter_state *st = seq->private;
- struct hlist_nulls_node *n;
- for (st->bucket = 0;
- st->bucket < net->ct.htable_size;
- st->bucket++) {
- n = rcu_dereference(
- hlist_nulls_first_rcu(&net->ct.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 net *net = seq_file_net(seq);
- 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 >= net->ct.htable_size)
- return NULL;
- }
- head = rcu_dereference(
- hlist_nulls_first_rcu(&net->ct.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)
- {
- rcu_read_lock();
- 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 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 (unlikely(!atomic_inc_not_zero(&ct->ct_general.use)))
- return 0;
- /* we only want to print DIR_ORIGINAL */
- if (NF_CT_DIRECTION(hash))
- goto release;
- if (nf_ct_l3num(ct) != AF_INET)
- 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),
- timer_pending(&ct->timeout)
- ? (long)(ct->timeout.expires - jiffies)/HZ : 0);
- 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 net *net = seq_file_net(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(&net->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 net *net = seq_file_net(seq);
- 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(&net->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 (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);
- }
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