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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>
- *
- * 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/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>
- #if 0
- #define DEBUGP printk
- #else
- #define DEBUGP(format, args...)
- #endif
- #ifdef CONFIG_NF_CT_ACCT
- static unsigned int
- seq_print_counters(struct seq_file *s,
- const struct ip_conntrack_counter *counter)
- {
- return seq_printf(s, "packets=%llu bytes=%llu ",
- (unsigned long long)counter->packets,
- (unsigned long long)counter->bytes);
- }
- #else
- #define seq_print_counters(x, y) 0
- #endif
- struct ct_iter_state {
- unsigned int bucket;
- };
- static struct list_head *ct_get_first(struct seq_file *seq)
- {
- struct ct_iter_state *st = seq->private;
- for (st->bucket = 0;
- st->bucket < nf_conntrack_htable_size;
- st->bucket++) {
- if (!list_empty(&nf_conntrack_hash[st->bucket]))
- return nf_conntrack_hash[st->bucket].next;
- }
- return NULL;
- }
- static struct list_head *ct_get_next(struct seq_file *seq, struct list_head *head)
- {
- struct ct_iter_state *st = seq->private;
- head = head->next;
- while (head == &nf_conntrack_hash[st->bucket]) {
- if (++st->bucket >= nf_conntrack_htable_size)
- return NULL;
- head = nf_conntrack_hash[st->bucket].next;
- }
- return head;
- }
- static struct list_head *ct_get_idx(struct seq_file *seq, loff_t pos)
- {
- struct list_head *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)
- {
- read_lock_bh(&nf_conntrack_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)
- {
- read_unlock_bh(&nf_conntrack_lock);
- }
- static int ct_seq_show(struct seq_file *s, void *v)
- {
- const struct nf_conntrack_tuple_hash *hash = v;
- const struct nf_conn *ct = nf_ct_tuplehash_to_ctrack(hash);
- struct nf_conntrack_l3proto *l3proto;
- struct nf_conntrack_l4proto *l4proto;
- NF_CT_ASSERT(ct);
- /* we only want to print DIR_ORIGINAL */
- if (NF_CT_DIRECTION(hash))
- return 0;
- if (ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.l3num != AF_INET)
- return 0;
- l3proto = __nf_ct_l3proto_find(ct->tuplehash[IP_CT_DIR_ORIGINAL]
- .tuple.src.l3num);
- NF_CT_ASSERT(l3proto);
- l4proto = __nf_ct_l4proto_find(ct->tuplehash[IP_CT_DIR_ORIGINAL]
- .tuple.src.l3num,
- ct->tuplehash[IP_CT_DIR_ORIGINAL]
- .tuple.dst.protonum);
- NF_CT_ASSERT(l4proto);
- if (seq_printf(s, "%-8s %u %ld ",
- l4proto->name,
- ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.protonum,
- timer_pending(&ct->timeout)
- ? (long)(ct->timeout.expires - jiffies)/HZ : 0) != 0)
- return -ENOSPC;
- if (l3proto->print_conntrack(s, ct))
- return -ENOSPC;
- if (l4proto->print_conntrack(s, ct))
- return -ENOSPC;
- if (print_tuple(s, &ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple,
- l3proto, l4proto))
- return -ENOSPC;
- if (seq_print_counters(s, &ct->counters[IP_CT_DIR_ORIGINAL]))
- return -ENOSPC;
- if (!(test_bit(IPS_SEEN_REPLY_BIT, &ct->status)))
- if (seq_printf(s, "[UNREPLIED] "))
- return -ENOSPC;
- if (print_tuple(s, &ct->tuplehash[IP_CT_DIR_REPLY].tuple,
- l3proto, l4proto))
- return -ENOSPC;
- if (seq_print_counters(s, &ct->counters[IP_CT_DIR_REPLY]))
- return -ENOSPC;
- if (test_bit(IPS_ASSURED_BIT, &ct->status))
- if (seq_printf(s, "[ASSURED] "))
- return -ENOSPC;
- #ifdef CONFIG_NF_CONNTRACK_MARK
- if (seq_printf(s, "mark=%u ", ct->mark))
- return -ENOSPC;
- #endif
- #ifdef CONFIG_NF_CONNTRACK_SECMARK
- if (seq_printf(s, "secmark=%u ", ct->secmark))
- return -ENOSPC;
- #endif
- if (seq_printf(s, "use=%u\n", atomic_read(&ct->ct_general.use)))
- return -ENOSPC;
- return 0;
- }
- static 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)
- {
- struct seq_file *seq;
- struct ct_iter_state *st;
- int ret;
- st = kmalloc(sizeof(struct ct_iter_state), GFP_KERNEL);
- if (st == NULL)
- return -ENOMEM;
- ret = seq_open(file, &ct_seq_ops);
- if (ret)
- goto out_free;
- seq = file->private_data;
- seq->private = st;
- memset(st, 0, sizeof(struct ct_iter_state));
- return ret;
- out_free:
- kfree(st);
- return ret;
- }
- static const struct file_operations ct_file_ops = {
- .owner = THIS_MODULE,
- .open = ct_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = seq_release_private,
- };
- /* expects */
- static void *exp_seq_start(struct seq_file *s, loff_t *pos)
- {
- struct list_head *e = &nf_conntrack_expect_list;
- loff_t i;
- /* strange seq_file api calls stop even if we fail,
- * thus we need to grab lock since stop unlocks */
- read_lock_bh(&nf_conntrack_lock);
- if (list_empty(e))
- return NULL;
- for (i = 0; i <= *pos; i++) {
- e = e->next;
- if (e == &nf_conntrack_expect_list)
- return NULL;
- }
- return e;
- }
- static void *exp_seq_next(struct seq_file *s, void *v, loff_t *pos)
- {
- struct list_head *e = v;
- ++*pos;
- e = e->next;
- if (e == &nf_conntrack_expect_list)
- return NULL;
- return e;
- }
- static void exp_seq_stop(struct seq_file *s, void *v)
- {
- read_unlock_bh(&nf_conntrack_lock);
- }
- static int exp_seq_show(struct seq_file *s, void *v)
- {
- struct nf_conntrack_expect *exp = v;
- 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));
- return seq_putc(s, '\n');
- }
- static 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(file, &exp_seq_ops);
- }
- static const struct file_operations ip_exp_file_ops = {
- .owner = THIS_MODULE,
- .open = exp_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = seq_release
- };
- static void *ct_cpu_seq_start(struct seq_file *seq, loff_t *pos)
- {
- int cpu;
- if (*pos == 0)
- return SEQ_START_TOKEN;
- for (cpu = *pos-1; cpu < NR_CPUS; ++cpu) {
- if (!cpu_possible(cpu))
- continue;
- *pos = cpu+1;
- return &per_cpu(nf_conntrack_stat, cpu);
- }
- return NULL;
- }
- static void *ct_cpu_seq_next(struct seq_file *seq, void *v, loff_t *pos)
- {
- int cpu;
- for (cpu = *pos; cpu < NR_CPUS; ++cpu) {
- if (!cpu_possible(cpu))
- continue;
- *pos = cpu+1;
- return &per_cpu(nf_conntrack_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)
- {
- unsigned int nr_conntracks = atomic_read(&nf_conntrack_count);
- 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\n");
- return 0;
- }
- seq_printf(seq, "%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
- );
- return 0;
- }
- static 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(file, &ct_cpu_seq_ops);
- }
- 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_private,
- };
- int __init nf_conntrack_ipv4_compat_init(void)
- {
- struct proc_dir_entry *proc, *proc_exp, *proc_stat;
- proc = proc_net_fops_create("ip_conntrack", 0440, &ct_file_ops);
- if (!proc)
- goto err1;
- proc_exp = proc_net_fops_create("ip_conntrack_expect", 0440,
- &ip_exp_file_ops);
- if (!proc_exp)
- goto err2;
- proc_stat = create_proc_entry("ip_conntrack", S_IRUGO, proc_net_stat);
- if (!proc_stat)
- goto err3;
- proc_stat->proc_fops = &ct_cpu_seq_fops;
- proc_stat->owner = THIS_MODULE;
- return 0;
- err3:
- proc_net_remove("ip_conntrack_expect");
- err2:
- proc_net_remove("ip_conntrack");
- err1:
- return -ENOMEM;
- }
- void __exit nf_conntrack_ipv4_compat_fini(void)
- {
- remove_proc_entry("ip_conntrack", proc_net_stat);
- proc_net_remove("ip_conntrack_expect");
- proc_net_remove("ip_conntrack");
- }
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