mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-21 08:19:28 +00:00
![Eric W. Biederman](/assets/img/avatar_default.png)
This patch makes /proc/net per network namespace. It modifies the global variables proc_net and proc_net_stat to be per network namespace. The proc_net file helpers are modified to take a network namespace argument, and all of their callers are fixed to pass &init_net for that argument. This ensures that all of the /proc/net files are only visible and usable in the initial network namespace until the code behind them has been updated to be handle multiple network namespaces. Making /proc/net per namespace is necessary as at least some files in /proc/net depend upon the set of network devices which is per network namespace, and even more files in /proc/net have contents that are relevant to a single network namespace. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Signed-off-by: David S. Miller <davem@davemloft.net>
443 lines
10 KiB
C
443 lines
10 KiB
C
/* 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 <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>
|
|
|
|
#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 hlist_node *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 (!hlist_empty(&nf_conntrack_hash[st->bucket]))
|
|
return nf_conntrack_hash[st->bucket].first;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
static struct hlist_node *ct_get_next(struct seq_file *seq,
|
|
struct hlist_node *head)
|
|
{
|
|
struct ct_iter_state *st = seq->private;
|
|
|
|
head = head->next;
|
|
while (head == NULL) {
|
|
if (++st->bucket >= nf_conntrack_htable_size)
|
|
return NULL;
|
|
head = nf_conntrack_hash[st->bucket].first;
|
|
}
|
|
return head;
|
|
}
|
|
|
|
static struct hlist_node *ct_get_idx(struct seq_file *seq, loff_t pos)
|
|
{
|
|
struct hlist_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)
|
|
{
|
|
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 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)
|
|
{
|
|
struct seq_file *seq;
|
|
struct ct_iter_state *st;
|
|
int ret;
|
|
|
|
st = kzalloc(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;
|
|
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 */
|
|
struct ct_expect_iter_state {
|
|
unsigned int bucket;
|
|
};
|
|
|
|
static struct hlist_node *ct_expect_get_first(struct seq_file *seq)
|
|
{
|
|
struct ct_expect_iter_state *st = seq->private;
|
|
|
|
for (st->bucket = 0; st->bucket < nf_ct_expect_hsize; st->bucket++) {
|
|
if (!hlist_empty(&nf_ct_expect_hash[st->bucket]))
|
|
return nf_ct_expect_hash[st->bucket].first;
|
|
}
|
|
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 = head->next;
|
|
while (head == NULL) {
|
|
if (++st->bucket >= nf_ct_expect_hsize)
|
|
return NULL;
|
|
head = nf_ct_expect_hash[st->bucket].first;
|
|
}
|
|
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)
|
|
{
|
|
read_lock_bh(&nf_conntrack_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)
|
|
{
|
|
read_unlock_bh(&nf_conntrack_lock);
|
|
}
|
|
|
|
static int exp_seq_show(struct seq_file *s, void *v)
|
|
{
|
|
struct nf_conntrack_expect *exp;
|
|
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));
|
|
return seq_putc(s, '\n');
|
|
}
|
|
|
|
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)
|
|
{
|
|
struct seq_file *seq;
|
|
struct ct_expect_iter_state *st;
|
|
int ret;
|
|
|
|
st = kzalloc(sizeof(struct ct_expect_iter_state), GFP_KERNEL);
|
|
if (!st)
|
|
return -ENOMEM;
|
|
ret = seq_open(file, &exp_seq_ops);
|
|
if (ret)
|
|
goto out_free;
|
|
seq = file->private_data;
|
|
seq->private = st;
|
|
return ret;
|
|
out_free:
|
|
kfree(st);
|
|
return ret;
|
|
}
|
|
|
|
static const struct file_operations ip_exp_file_ops = {
|
|
.owner = THIS_MODULE,
|
|
.open = exp_open,
|
|
.read = seq_read,
|
|
.llseek = seq_lseek,
|
|
.release = seq_release_private,
|
|
};
|
|
|
|
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 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(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(&init_net, "ip_conntrack", 0440, &ct_file_ops);
|
|
if (!proc)
|
|
goto err1;
|
|
|
|
proc_exp = proc_net_fops_create(&init_net, "ip_conntrack_expect", 0440,
|
|
&ip_exp_file_ops);
|
|
if (!proc_exp)
|
|
goto err2;
|
|
|
|
proc_stat = create_proc_entry("ip_conntrack", S_IRUGO, init_net.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(&init_net, "ip_conntrack_expect");
|
|
err2:
|
|
proc_net_remove(&init_net, "ip_conntrack");
|
|
err1:
|
|
return -ENOMEM;
|
|
}
|
|
|
|
void __exit nf_conntrack_ipv4_compat_fini(void)
|
|
{
|
|
remove_proc_entry("ip_conntrack", init_net.proc_net_stat);
|
|
proc_net_remove(&init_net, "ip_conntrack_expect");
|
|
proc_net_remove(&init_net, "ip_conntrack");
|
|
}
|