--- /dev/null
+/* 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);
+}
Code Review / kvmfornfv.git / blobdiff