![Patrick McHardy](/assets/img/avatar_default.png)
Add copyright statements to all netfilter files which have had significant changes done by myself in the past. Some notes: - nf_conntrack_ecache.c was incorrectly attributed to Rusty and Netfilter Core Team when it got split out of nf_conntrack_core.c. The copyrights even state a date which lies six years before it was written. It was written in 2005 by Harald and myself. - net/ipv{4,6}/netfilter.c, net/netfitler/nf_queue.c were missing copyright statements. I've added the copyright statement from net/netfilter/core.c, where this code originated - for nf_conntrack_proto_tcp.c I've also added Jozsef, since I didn't want it to give the wrong impression Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
465 lines
11 KiB
C
465 lines
11 KiB
C
/* ip_conntrack proc compat - based on ip_conntrack_standalone.c
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*
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* (C) 1999-2001 Paul `Rusty' Russell
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* (C) 2002-2006 Netfilter Core Team <coreteam@netfilter.org>
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* (C) 2006-2010 Patrick McHardy <kaber@trash.net>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/types.h>
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#include <linux/proc_fs.h>
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#include <linux/seq_file.h>
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#include <linux/percpu.h>
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#include <linux/security.h>
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#include <net/net_namespace.h>
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#include <linux/netfilter.h>
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#include <net/netfilter/nf_conntrack_core.h>
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#include <net/netfilter/nf_conntrack_l3proto.h>
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#include <net/netfilter/nf_conntrack_l4proto.h>
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#include <net/netfilter/nf_conntrack_expect.h>
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#include <net/netfilter/nf_conntrack_acct.h>
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#include <linux/rculist_nulls.h>
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#include <linux/export.h>
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struct ct_iter_state {
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struct seq_net_private p;
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unsigned int bucket;
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};
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static struct hlist_nulls_node *ct_get_first(struct seq_file *seq)
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{
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struct net *net = seq_file_net(seq);
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struct ct_iter_state *st = seq->private;
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struct hlist_nulls_node *n;
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for (st->bucket = 0;
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st->bucket < net->ct.htable_size;
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st->bucket++) {
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n = rcu_dereference(
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hlist_nulls_first_rcu(&net->ct.hash[st->bucket]));
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if (!is_a_nulls(n))
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return n;
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}
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return NULL;
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}
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static struct hlist_nulls_node *ct_get_next(struct seq_file *seq,
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struct hlist_nulls_node *head)
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{
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struct net *net = seq_file_net(seq);
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struct ct_iter_state *st = seq->private;
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head = rcu_dereference(hlist_nulls_next_rcu(head));
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while (is_a_nulls(head)) {
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if (likely(get_nulls_value(head) == st->bucket)) {
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if (++st->bucket >= net->ct.htable_size)
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return NULL;
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}
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head = rcu_dereference(
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hlist_nulls_first_rcu(&net->ct.hash[st->bucket]));
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}
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return head;
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}
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static struct hlist_nulls_node *ct_get_idx(struct seq_file *seq, loff_t pos)
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{
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struct hlist_nulls_node *head = ct_get_first(seq);
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if (head)
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while (pos && (head = ct_get_next(seq, head)))
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pos--;
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return pos ? NULL : head;
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}
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static void *ct_seq_start(struct seq_file *seq, loff_t *pos)
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__acquires(RCU)
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{
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rcu_read_lock();
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return ct_get_idx(seq, *pos);
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}
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static void *ct_seq_next(struct seq_file *s, void *v, loff_t *pos)
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{
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(*pos)++;
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return ct_get_next(s, v);
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}
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static void ct_seq_stop(struct seq_file *s, void *v)
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__releases(RCU)
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{
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rcu_read_unlock();
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}
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#ifdef CONFIG_NF_CONNTRACK_SECMARK
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static int ct_show_secctx(struct seq_file *s, const struct nf_conn *ct)
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{
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int ret;
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u32 len;
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char *secctx;
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ret = security_secid_to_secctx(ct->secmark, &secctx, &len);
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if (ret)
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return 0;
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ret = seq_printf(s, "secctx=%s ", secctx);
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security_release_secctx(secctx, len);
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return ret;
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}
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#else
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static inline int ct_show_secctx(struct seq_file *s, const struct nf_conn *ct)
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{
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return 0;
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}
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#endif
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static int ct_seq_show(struct seq_file *s, void *v)
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{
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struct nf_conntrack_tuple_hash *hash = v;
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struct nf_conn *ct = nf_ct_tuplehash_to_ctrack(hash);
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const struct nf_conntrack_l3proto *l3proto;
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const struct nf_conntrack_l4proto *l4proto;
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int ret = 0;
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NF_CT_ASSERT(ct);
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if (unlikely(!atomic_inc_not_zero(&ct->ct_general.use)))
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return 0;
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/* we only want to print DIR_ORIGINAL */
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if (NF_CT_DIRECTION(hash))
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goto release;
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if (nf_ct_l3num(ct) != AF_INET)
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goto release;
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l3proto = __nf_ct_l3proto_find(nf_ct_l3num(ct));
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NF_CT_ASSERT(l3proto);
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l4proto = __nf_ct_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct));
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NF_CT_ASSERT(l4proto);
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ret = -ENOSPC;
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if (seq_printf(s, "%-8s %u %ld ",
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l4proto->name, nf_ct_protonum(ct),
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timer_pending(&ct->timeout)
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? (long)(ct->timeout.expires - jiffies)/HZ : 0) != 0)
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goto release;
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if (l4proto->print_conntrack && l4proto->print_conntrack(s, ct))
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goto release;
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if (print_tuple(s, &ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple,
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l3proto, l4proto))
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goto release;
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if (seq_print_acct(s, ct, IP_CT_DIR_ORIGINAL))
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goto release;
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if (!(test_bit(IPS_SEEN_REPLY_BIT, &ct->status)))
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if (seq_printf(s, "[UNREPLIED] "))
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goto release;
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if (print_tuple(s, &ct->tuplehash[IP_CT_DIR_REPLY].tuple,
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l3proto, l4proto))
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goto release;
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if (seq_print_acct(s, ct, IP_CT_DIR_REPLY))
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goto release;
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if (test_bit(IPS_ASSURED_BIT, &ct->status))
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if (seq_printf(s, "[ASSURED] "))
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goto release;
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#ifdef CONFIG_NF_CONNTRACK_MARK
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if (seq_printf(s, "mark=%u ", ct->mark))
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goto release;
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#endif
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if (ct_show_secctx(s, ct))
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goto release;
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if (seq_printf(s, "use=%u\n", atomic_read(&ct->ct_general.use)))
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goto release;
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ret = 0;
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release:
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nf_ct_put(ct);
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return ret;
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}
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static const struct seq_operations ct_seq_ops = {
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.start = ct_seq_start,
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.next = ct_seq_next,
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.stop = ct_seq_stop,
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.show = ct_seq_show
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};
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static int ct_open(struct inode *inode, struct file *file)
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{
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return seq_open_net(inode, file, &ct_seq_ops,
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sizeof(struct ct_iter_state));
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}
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static const struct file_operations ct_file_ops = {
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.owner = THIS_MODULE,
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.open = ct_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = seq_release_net,
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};
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/* expects */
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struct ct_expect_iter_state {
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struct seq_net_private p;
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unsigned int bucket;
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};
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static struct hlist_node *ct_expect_get_first(struct seq_file *seq)
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{
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struct net *net = seq_file_net(seq);
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struct ct_expect_iter_state *st = seq->private;
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struct hlist_node *n;
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for (st->bucket = 0; st->bucket < nf_ct_expect_hsize; st->bucket++) {
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n = rcu_dereference(
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hlist_first_rcu(&net->ct.expect_hash[st->bucket]));
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if (n)
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return n;
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}
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return NULL;
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}
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static struct hlist_node *ct_expect_get_next(struct seq_file *seq,
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struct hlist_node *head)
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{
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struct net *net = seq_file_net(seq);
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struct ct_expect_iter_state *st = seq->private;
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head = rcu_dereference(hlist_next_rcu(head));
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while (head == NULL) {
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if (++st->bucket >= nf_ct_expect_hsize)
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return NULL;
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head = rcu_dereference(
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hlist_first_rcu(&net->ct.expect_hash[st->bucket]));
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}
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return head;
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}
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static struct hlist_node *ct_expect_get_idx(struct seq_file *seq, loff_t pos)
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{
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struct hlist_node *head = ct_expect_get_first(seq);
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if (head)
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while (pos && (head = ct_expect_get_next(seq, head)))
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pos--;
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return pos ? NULL : head;
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}
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static void *exp_seq_start(struct seq_file *seq, loff_t *pos)
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__acquires(RCU)
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{
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rcu_read_lock();
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return ct_expect_get_idx(seq, *pos);
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}
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static void *exp_seq_next(struct seq_file *seq, void *v, loff_t *pos)
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{
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(*pos)++;
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return ct_expect_get_next(seq, v);
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}
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static void exp_seq_stop(struct seq_file *seq, void *v)
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__releases(RCU)
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{
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rcu_read_unlock();
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}
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static int exp_seq_show(struct seq_file *s, void *v)
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{
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struct nf_conntrack_expect *exp;
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const struct hlist_node *n = v;
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exp = hlist_entry(n, struct nf_conntrack_expect, hnode);
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if (exp->tuple.src.l3num != AF_INET)
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return 0;
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if (exp->timeout.function)
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seq_printf(s, "%ld ", timer_pending(&exp->timeout)
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? (long)(exp->timeout.expires - jiffies)/HZ : 0);
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else
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seq_printf(s, "- ");
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seq_printf(s, "proto=%u ", exp->tuple.dst.protonum);
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print_tuple(s, &exp->tuple,
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__nf_ct_l3proto_find(exp->tuple.src.l3num),
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__nf_ct_l4proto_find(exp->tuple.src.l3num,
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exp->tuple.dst.protonum));
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return seq_putc(s, '\n');
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}
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static const struct seq_operations exp_seq_ops = {
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.start = exp_seq_start,
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.next = exp_seq_next,
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.stop = exp_seq_stop,
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.show = exp_seq_show
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};
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static int exp_open(struct inode *inode, struct file *file)
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{
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return seq_open_net(inode, file, &exp_seq_ops,
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sizeof(struct ct_expect_iter_state));
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}
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static const struct file_operations ip_exp_file_ops = {
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.owner = THIS_MODULE,
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.open = exp_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = seq_release_net,
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};
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static void *ct_cpu_seq_start(struct seq_file *seq, loff_t *pos)
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{
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struct net *net = seq_file_net(seq);
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int cpu;
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if (*pos == 0)
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return SEQ_START_TOKEN;
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for (cpu = *pos-1; cpu < nr_cpu_ids; ++cpu) {
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if (!cpu_possible(cpu))
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continue;
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*pos = cpu+1;
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return per_cpu_ptr(net->ct.stat, cpu);
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}
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return NULL;
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}
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static void *ct_cpu_seq_next(struct seq_file *seq, void *v, loff_t *pos)
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{
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struct net *net = seq_file_net(seq);
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int cpu;
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for (cpu = *pos; cpu < nr_cpu_ids; ++cpu) {
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if (!cpu_possible(cpu))
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continue;
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*pos = cpu+1;
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return per_cpu_ptr(net->ct.stat, cpu);
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}
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return NULL;
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}
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static void ct_cpu_seq_stop(struct seq_file *seq, void *v)
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{
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}
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static int ct_cpu_seq_show(struct seq_file *seq, void *v)
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{
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struct net *net = seq_file_net(seq);
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unsigned int nr_conntracks = atomic_read(&net->ct.count);
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const struct ip_conntrack_stat *st = v;
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if (v == SEQ_START_TOKEN) {
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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");
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return 0;
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}
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seq_printf(seq, "%08x %08x %08x %08x %08x %08x %08x %08x "
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"%08x %08x %08x %08x %08x %08x %08x %08x %08x\n",
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nr_conntracks,
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st->searched,
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st->found,
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st->new,
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st->invalid,
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st->ignore,
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st->delete,
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st->delete_list,
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st->insert,
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st->insert_failed,
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st->drop,
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st->early_drop,
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st->error,
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st->expect_new,
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st->expect_create,
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st->expect_delete,
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st->search_restart
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);
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return 0;
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}
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static const struct seq_operations ct_cpu_seq_ops = {
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.start = ct_cpu_seq_start,
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.next = ct_cpu_seq_next,
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.stop = ct_cpu_seq_stop,
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.show = ct_cpu_seq_show,
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};
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static int ct_cpu_seq_open(struct inode *inode, struct file *file)
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{
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return seq_open_net(inode, file, &ct_cpu_seq_ops,
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sizeof(struct seq_net_private));
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}
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static const struct file_operations ct_cpu_seq_fops = {
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.owner = THIS_MODULE,
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.open = ct_cpu_seq_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = seq_release_net,
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};
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static int __net_init ip_conntrack_net_init(struct net *net)
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{
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struct proc_dir_entry *proc, *proc_exp, *proc_stat;
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proc = proc_create("ip_conntrack", 0440, net->proc_net, &ct_file_ops);
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if (!proc)
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goto err1;
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proc_exp = proc_create("ip_conntrack_expect", 0440, net->proc_net,
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&ip_exp_file_ops);
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if (!proc_exp)
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goto err2;
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proc_stat = proc_create("ip_conntrack", S_IRUGO,
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net->proc_net_stat, &ct_cpu_seq_fops);
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if (!proc_stat)
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goto err3;
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return 0;
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err3:
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remove_proc_entry("ip_conntrack_expect", net->proc_net);
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err2:
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remove_proc_entry("ip_conntrack", net->proc_net);
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err1:
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return -ENOMEM;
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}
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static void __net_exit ip_conntrack_net_exit(struct net *net)
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{
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remove_proc_entry("ip_conntrack", net->proc_net_stat);
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remove_proc_entry("ip_conntrack_expect", net->proc_net);
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remove_proc_entry("ip_conntrack", net->proc_net);
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}
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static struct pernet_operations ip_conntrack_net_ops = {
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.init = ip_conntrack_net_init,
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.exit = ip_conntrack_net_exit,
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};
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int __init nf_conntrack_ipv4_compat_init(void)
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{
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return register_pernet_subsys(&ip_conntrack_net_ops);
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}
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void __exit nf_conntrack_ipv4_compat_fini(void)
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{
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unregister_pernet_subsys(&ip_conntrack_net_ops);
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}
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