Release 4.11 net/netfilter/nf_conntrack_expect.c
/* Expectation handling for nf_conntrack. */
/* (C) 1999-2001 Paul `Rusty' Russell
* (C) 2002-2006 Netfilter Core Team <coreteam@netfilter.org>
* (C) 2003,2004 USAGI/WIDE Project <http://www.linux-ipv6.org>
* (c) 2005-2012 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/netfilter.h>
#include <linux/skbuff.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/stddef.h>
#include <linux/slab.h>
#include <linux/err.h>
#include <linux/percpu.h>
#include <linux/kernel.h>
#include <linux/jhash.h>
#include <linux/moduleparam.h>
#include <linux/export.h>
#include <net/net_namespace.h>
#include <net/netns/hash.h>
#include <net/netfilter/nf_conntrack.h>
#include <net/netfilter/nf_conntrack_core.h>
#include <net/netfilter/nf_conntrack_expect.h>
#include <net/netfilter/nf_conntrack_helper.h>
#include <net/netfilter/nf_conntrack_tuple.h>
#include <net/netfilter/nf_conntrack_zones.h>
unsigned int nf_ct_expect_hsize __read_mostly;
EXPORT_SYMBOL_GPL(nf_ct_expect_hsize);
struct hlist_head *nf_ct_expect_hash __read_mostly;
EXPORT_SYMBOL_GPL(nf_ct_expect_hash);
unsigned int nf_ct_expect_max __read_mostly;
static struct kmem_cache *nf_ct_expect_cachep __read_mostly;
static unsigned int nf_ct_expect_hashrnd __read_mostly;
/* nf_conntrack_expect helper functions */
void nf_ct_unlink_expect_report(struct nf_conntrack_expect *exp,
u32 portid, int report)
{
struct nf_conn_help *master_help = nfct_help(exp->master);
struct net *net = nf_ct_exp_net(exp);
NF_CT_ASSERT(master_help);
NF_CT_ASSERT(!timer_pending(&exp->timeout));
hlist_del_rcu(&exp->hnode);
net->ct.expect_count--;
hlist_del_rcu(&exp->lnode);
master_help->expecting[exp->class]--;
nf_ct_expect_event_report(IPEXP_DESTROY, exp, portid, report);
nf_ct_expect_put(exp);
NF_CT_STAT_INC(net, expect_delete);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Martin Josefsson | 45 | 40.54% | 1 | 8.33% |
Patrick McHardy | 27 | 24.32% | 6 | 50.00% |
Pablo Neira Ayuso | 21 | 18.92% | 2 | 16.67% |
Alexey Dobriyan | 17 | 15.32% | 2 | 16.67% |
Liping Zhang | 1 | 0.90% | 1 | 8.33% |
Total | 111 | 100.00% | 12 | 100.00% |
EXPORT_SYMBOL_GPL(nf_ct_unlink_expect_report);
static void nf_ct_expectation_timed_out(unsigned long ul_expect)
{
struct nf_conntrack_expect *exp = (void *)ul_expect;
spin_lock_bh(&nf_conntrack_expect_lock);
nf_ct_unlink_expect(exp);
spin_unlock_bh(&nf_conntrack_expect_lock);
nf_ct_expect_put(exp);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Martin Josefsson | 37 | 86.05% | 1 | 25.00% |
Patrick McHardy | 4 | 9.30% | 2 | 50.00% |
Jesper Dangaard Brouer | 2 | 4.65% | 1 | 25.00% |
Total | 43 | 100.00% | 4 | 100.00% |
static unsigned int nf_ct_expect_dst_hash(const struct net *n, const struct nf_conntrack_tuple *tuple)
{
unsigned int hash, seed;
get_random_once(&nf_ct_expect_hashrnd, sizeof(nf_ct_expect_hashrnd));
seed = nf_ct_expect_hashrnd ^ net_hash_mix(n);
hash = jhash2(tuple->dst.u3.all, ARRAY_SIZE(tuple->dst.u3.all),
(((tuple->dst.protonum ^ tuple->src.l3num) << 16) |
(__force __u16)tuple->dst.u.all) ^ seed);
return reciprocal_scale(hash, nf_ct_expect_hsize);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Patrick McHardy | 77 | 69.37% | 2 | 33.33% |
Florian Westphal | 26 | 23.42% | 2 | 33.33% |
Daniel Borkmann | 4 | 3.60% | 1 | 16.67% |
Al Viro | 4 | 3.60% | 1 | 16.67% |
Total | 111 | 100.00% | 6 | 100.00% |
static bool
nf_ct_exp_equal(const struct nf_conntrack_tuple *tuple,
const struct nf_conntrack_expect *i,
const struct nf_conntrack_zone *zone,
const struct net *net)
{
return nf_ct_tuple_mask_cmp(tuple, &i->tuple, &i->mask) &&
net_eq(net, nf_ct_net(i->master)) &&
nf_ct_zone_equal_any(i->master, zone);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Florian Westphal | 67 | 100.00% | 1 | 100.00% |
Total | 67 | 100.00% | 1 | 100.00% |
struct nf_conntrack_expect *
__nf_ct_expect_find(struct net *net,
const struct nf_conntrack_zone *zone,
const struct nf_conntrack_tuple *tuple)
{
struct nf_conntrack_expect *i;
unsigned int h;
if (!net->ct.expect_count)
return NULL;
h = nf_ct_expect_dst_hash(net, tuple);
hlist_for_each_entry_rcu(i, &nf_ct_expect_hash[h], hnode) {
if (nf_ct_exp_equal(tuple, i, zone, net))
return i;
}
return NULL;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Martin Josefsson | 35 | 42.17% | 1 | 10.00% |
Patrick McHardy | 26 | 31.33% | 4 | 40.00% |
Alexey Dobriyan | 10 | 12.05% | 1 | 10.00% |
Florian Westphal | 6 | 7.23% | 3 | 30.00% |
Daniel Borkmann | 6 | 7.23% | 1 | 10.00% |
Total | 83 | 100.00% | 10 | 100.00% |
EXPORT_SYMBOL_GPL(__nf_ct_expect_find);
/* Just find a expectation corresponding to a tuple. */
struct nf_conntrack_expect *
nf_ct_expect_find_get(struct net *net,
const struct nf_conntrack_zone *zone,
const struct nf_conntrack_tuple *tuple)
{
struct nf_conntrack_expect *i;
rcu_read_lock();
i = __nf_ct_expect_find(net, zone, tuple);
if (i && !atomic_inc_not_zero(&i->use))
i = NULL;
rcu_read_unlock();
return i;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Martin Josefsson | 38 | 57.58% | 1 | 16.67% |
Patrick McHardy | 17 | 25.76% | 3 | 50.00% |
Alexey Dobriyan | 7 | 10.61% | 1 | 16.67% |
Daniel Borkmann | 4 | 6.06% | 1 | 16.67% |
Total | 66 | 100.00% | 6 | 100.00% |
EXPORT_SYMBOL_GPL(nf_ct_expect_find_get);
/* If an expectation for this connection is found, it gets delete from
* global list then returned. */
struct nf_conntrack_expect *
nf_ct_find_expectation(struct net *net,
const struct nf_conntrack_zone *zone,
const struct nf_conntrack_tuple *tuple)
{
struct nf_conntrack_expect *i, *exp = NULL;
unsigned int h;
if (!net->ct.expect_count)
return NULL;
h = nf_ct_expect_dst_hash(net, tuple);
hlist_for_each_entry(i, &nf_ct_expect_hash[h], hnode) {
if (!(i->flags & NF_CT_EXPECT_INACTIVE) &&
nf_ct_exp_equal(tuple, i, zone, net)) {
exp = i;
break;
}
}
if (!exp)
return NULL;
/* If master is not in hash table yet (ie. packet hasn't left
this machine yet), how can other end know about expected?
Hence these are not the droids you are looking for (if
master ct never got confirmed, we'd hold a reference to it
and weird things would happen to future packets). */
if (!nf_ct_is_confirmed(exp->master))
return NULL;
/* Avoid race with other CPUs, that for exp->master ct, is
* about to invoke ->destroy(), or nf_ct_delete() via timeout
* or early_drop().
*
* The atomic_inc_not_zero() check tells: If that fails, we
* know that the ct is being destroyed. If it succeeds, we
* can be sure the ct cannot disappear underneath.
*/
if (unlikely(nf_ct_is_dying(exp->master) ||
!atomic_inc_not_zero(&exp->master->ct_general.use)))
return NULL;
if (exp->flags & NF_CT_EXPECT_PERMANENT) {
atomic_inc(&exp->use);
return exp;
} else if (del_timer(&exp->timeout)) {
nf_ct_unlink_expect(exp);
return exp;
}
/* Undo exp->master refcnt increase, if del_timer() failed */
nf_ct_put(exp->master);
return NULL;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Martin Josefsson | 65 | 32.18% | 1 | 9.09% |
Patrick McHardy | 55 | 27.23% | 3 | 27.27% |
Jesper Dangaard Brouer | 37 | 18.32% | 1 | 9.09% |
Yasuyuki Kozakai | 23 | 11.39% | 1 | 9.09% |
Alexey Dobriyan | 10 | 4.95% | 1 | 9.09% |
Daniel Borkmann | 6 | 2.97% | 1 | 9.09% |
Florian Westphal | 6 | 2.97% | 3 | 27.27% |
Total | 202 | 100.00% | 11 | 100.00% |
/* delete all expectations for this conntrack */
void nf_ct_remove_expectations(struct nf_conn *ct)
{
struct nf_conn_help *help = nfct_help(ct);
struct nf_conntrack_expect *exp;
struct hlist_node *next;
/* Optimization: most connection never expect any others. */
if (!help)
return;
spin_lock_bh(&nf_conntrack_expect_lock);
hlist_for_each_entry_safe(exp, next, &help->expectations, lnode) {
if (del_timer(&exp->timeout)) {
nf_ct_unlink_expect(exp);
nf_ct_expect_put(exp);
}
}
spin_unlock_bh(&nf_conntrack_expect_lock);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Martin Josefsson | 51 | 61.45% | 1 | 25.00% |
Patrick McHardy | 20 | 24.10% | 2 | 50.00% |
Jesper Dangaard Brouer | 12 | 14.46% | 1 | 25.00% |
Total | 83 | 100.00% | 4 | 100.00% |
EXPORT_SYMBOL_GPL(nf_ct_remove_expectations);
/* Would two expected things clash? */
static inline int expect_clash(const struct nf_conntrack_expect *a,
const struct nf_conntrack_expect *b)
{
/* Part covered by intersection of masks must be unequal,
otherwise they clash */
struct nf_conntrack_tuple_mask intersect_mask;
int count;
intersect_mask.src.u.all = a->mask.src.u.all & b->mask.src.u.all;
for (count = 0; count < NF_CT_TUPLE_L3SIZE; count++){
intersect_mask.src.u3.all[count] =
a->mask.src.u3.all[count] & b->mask.src.u3.all[count];
}
return nf_ct_tuple_mask_cmp(&a->tuple, &b->tuple, &intersect_mask) &&
net_eq(nf_ct_net(a->master), nf_ct_net(b->master)) &&
nf_ct_zone_equal_any(a->master, nf_ct_zone(b->master));
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Martin Josefsson | 123 | 79.35% | 1 | 16.67% |
Florian Westphal | 17 | 10.97% | 1 | 16.67% |
Joe Stringer | 11 | 7.10% | 1 | 16.67% |
Daniel Borkmann | 3 | 1.94% | 2 | 33.33% |
Patrick McHardy | 1 | 0.65% | 1 | 16.67% |
Total | 155 | 100.00% | 6 | 100.00% |
static inline int expect_matches(const struct nf_conntrack_expect *a,
const struct nf_conntrack_expect *b)
{
return a->master == b->master && a->class == b->class &&
nf_ct_tuple_equal(&a->tuple, &b->tuple) &&
nf_ct_tuple_mask_equal(&a->mask, &b->mask) &&
net_eq(nf_ct_net(a->master), nf_ct_net(b->master)) &&
nf_ct_zone_equal_any(a->master, nf_ct_zone(b->master));
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Martin Josefsson | 53 | 56.99% | 1 | 14.29% |
Patrick McHardy | 20 | 21.51% | 3 | 42.86% |
Florian Westphal | 17 | 18.28% | 1 | 14.29% |
Daniel Borkmann | 3 | 3.23% | 2 | 28.57% |
Total | 93 | 100.00% | 7 | 100.00% |
/* Generally a bad idea to call this: could have matched already. */
void nf_ct_unexpect_related(struct nf_conntrack_expect *exp)
{
spin_lock_bh(&nf_conntrack_expect_lock);
if (del_timer(&exp->timeout)) {
nf_ct_unlink_expect(exp);
nf_ct_expect_put(exp);
}
spin_unlock_bh(&nf_conntrack_expect_lock);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Martin Josefsson | 35 | 79.55% | 1 | 20.00% |
Patrick McHardy | 7 | 15.91% | 3 | 60.00% |
Jesper Dangaard Brouer | 2 | 4.55% | 1 | 20.00% |
Total | 44 | 100.00% | 5 | 100.00% |
EXPORT_SYMBOL_GPL(nf_ct_unexpect_related);
/* We don't increase the master conntrack refcount for non-fulfilled
* conntracks. During the conntrack destruction, the expectations are
* always killed before the conntrack itself */
struct nf_conntrack_expect *nf_ct_expect_alloc(struct nf_conn *me)
{
struct nf_conntrack_expect *new;
new = kmem_cache_alloc(nf_ct_expect_cachep, GFP_ATOMIC);
if (!new)
return NULL;
new->master = me;
atomic_set(&new->use, 1);
return new;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Martin Josefsson | 51 | 96.23% | 1 | 50.00% |
Patrick McHardy | 2 | 3.77% | 1 | 50.00% |
Total | 53 | 100.00% | 2 | 100.00% |
EXPORT_SYMBOL_GPL(nf_ct_expect_alloc);
void nf_ct_expect_init(struct nf_conntrack_expect *exp, unsigned int class,
u_int8_t family,
const union nf_inet_addr *saddr,
const union nf_inet_addr *daddr,
u_int8_t proto, const __be16 *src, const __be16 *dst)
{
int len;
if (family == AF_INET)
len = 4;
else
len = 16;
exp->flags = 0;
exp->class = class;
exp->expectfn = NULL;
exp->helper = NULL;
exp->tuple.src.l3num = family;
exp->tuple.dst.protonum = proto;
if (saddr) {
memcpy(&exp->tuple.src.u3, saddr, len);
if (sizeof(exp->tuple.src.u3) > len)
/* address needs to be cleared for nf_ct_tuple_equal */
memset((void *)&exp->tuple.src.u3 + len, 0x00,
sizeof(exp->tuple.src.u3) - len);
memset(&exp->mask.src.u3, 0xFF, len);
if (sizeof(exp->mask.src.u3) > len)
memset((void *)&exp->mask.src.u3 + len, 0x00,
sizeof(exp->mask.src.u3) - len);
} else {
memset(&exp->tuple.src.u3, 0x00, sizeof(exp->tuple.src.u3));
memset(&exp->mask.src.u3, 0x00, sizeof(exp->mask.src.u3));
}
if (src) {
exp->tuple.src.u.all = *src;
exp->mask.src.u.all = htons(0xFFFF);
} else {
exp->tuple.src.u.all = 0;
exp->mask.src.u.all = 0;
}
memcpy(&exp->tuple.dst.u3, daddr, len);
if (sizeof(exp->tuple.dst.u3) > len)
/* address needs to be cleared for nf_ct_tuple_equal */
memset((void *)&exp->tuple.dst.u3 + len, 0x00,
sizeof(exp->tuple.dst.u3) - len);
exp->tuple.dst.u.all = *dst;
#ifdef CONFIG_NF_NAT_NEEDED
memset(&exp->saved_addr, 0, sizeof(exp->saved_addr));
memset(&exp->saved_proto, 0, sizeof(exp->saved_proto));
#endif
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Patrick McHardy | 425 | 90.43% | 5 | 55.56% |
Pablo Neira Ayuso | 39 | 8.30% | 1 | 11.11% |
Al Viro | 3 | 0.64% | 1 | 11.11% |
Jan Engelhardt | 3 | 0.64% | 2 | 22.22% |
Total | 470 | 100.00% | 9 | 100.00% |
EXPORT_SYMBOL_GPL(nf_ct_expect_init);
static void nf_ct_expect_free_rcu(struct rcu_head *head)
{
struct nf_conntrack_expect *exp;
exp = container_of(head, struct nf_conntrack_expect, rcu);
kmem_cache_free(nf_ct_expect_cachep, exp);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Patrick McHardy | 35 | 100.00% | 1 | 100.00% |
Total | 35 | 100.00% | 1 | 100.00% |
void nf_ct_expect_put(struct nf_conntrack_expect *exp)
{
if (atomic_dec_and_test(&exp->use))
call_rcu(&exp->rcu, nf_ct_expect_free_rcu);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Martin Josefsson | 23 | 76.67% | 1 | 33.33% |
Patrick McHardy | 7 | 23.33% | 2 | 66.67% |
Total | 30 | 100.00% | 3 | 100.00% |
EXPORT_SYMBOL_GPL(nf_ct_expect_put);
static void nf_ct_expect_insert(struct nf_conntrack_expect *exp)
{
struct nf_conn_help *master_help = nfct_help(exp->master);
struct nf_conntrack_helper *helper;
struct net *net = nf_ct_exp_net(exp);
unsigned int h = nf_ct_expect_dst_hash(net, &exp->tuple);
/* two references : one for hash insert, one for the timer */
atomic_add(2, &exp->use);
hlist_add_head_rcu(&exp->lnode, &master_help->expectations);
master_help->expecting[exp->class]++;
hlist_add_head_rcu(&exp->hnode, &nf_ct_expect_hash[h]);
net->ct.expect_count++;
setup_timer(&exp->timeout, nf_ct_expectation_timed_out,
(unsigned long)exp);
helper = rcu_dereference_protected(master_help->helper,
lockdep_is_held(&nf_conntrack_expect_lock));
if (helper) {
exp->timeout.expires = jiffies +
helper->expect_policy[exp->class].timeout * HZ;
}
add_timer(&exp->timeout);
NF_CT_STAT_INC(net, expect_create);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Martin Josefsson | 73 | 40.56% | 1 | 5.56% |
Patrick McHardy | 52 | 28.89% | 6 | 33.33% |
Pablo Neira Ayuso | 20 | 11.11% | 2 | 11.11% |
Alexey Dobriyan | 17 | 9.44% | 2 | 11.11% |
Eric Dumazet | 12 | 6.67% | 2 | 11.11% |
Florian Westphal | 3 | 1.67% | 2 | 11.11% |
Liping Zhang | 1 | 0.56% | 1 | 5.56% |
Gao Feng | 1 | 0.56% | 1 | 5.56% |
Jesper Dangaard Brouer | 1 | 0.56% | 1 | 5.56% |
Total | 180 | 100.00% | 18 | 100.00% |
/* Race with expectations being used means we could have none to find; OK. */
static void evict_oldest_expect(struct nf_conn *master,
struct nf_conntrack_expect *new)
{
struct nf_conn_help *master_help = nfct_help(master);
struct nf_conntrack_expect *exp, *last = NULL;
hlist_for_each_entry(exp, &master_help->expectations, lnode) {
if (exp->class == new->class)
last = exp;
}
if (last && del_timer(&last->timeout)) {
nf_ct_unlink_expect(last);
nf_ct_expect_put(last);
}
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Patrick McHardy | 49 | 58.33% | 3 | 75.00% |
Martin Josefsson | 35 | 41.67% | 1 | 25.00% |
Total | 84 | 100.00% | 4 | 100.00% |
static inline int __nf_ct_expect_check(struct nf_conntrack_expect *expect)
{
const struct nf_conntrack_expect_policy *p;
struct nf_conntrack_expect *i;
struct nf_conn *master = expect->master;
struct nf_conn_help *master_help = nfct_help(master);
struct nf_conntrack_helper *helper;
struct net *net = nf_ct_exp_net(expect);
struct hlist_node *next;
unsigned int h;
int ret = 0;
if (!master_help) {
ret = -ESHUTDOWN;
goto out;
}
h = nf_ct_expect_dst_hash(net, &expect->tuple);
hlist_for_each_entry_safe(i, next, &nf_ct_expect_hash[h], hnode) {
if (expect_matches(i, expect)) {
if (del_timer(&i->timeout)) {
nf_ct_unlink_expect(i);
nf_ct_expect_put(i);
break;
}
} else if (expect_clash(i, expect)) {
ret = -EBUSY;
goto out;
}
}
/* Will be over limit? */
helper = rcu_dereference_protected(master_help->helper,
lockdep_is_held(&nf_conntrack_expect_lock));
if (helper) {
p = &helper->expect_policy[expect->class];
if (p->max_expected &&
master_help->expecting[expect->class] >= p->max_expected) {
evict_oldest_expect(master, expect);
if (master_help->expecting[expect->class]
>= p->max_expected) {
ret = -EMFILE;
goto out;
}
}
}
if (net->ct.expect_count >= nf_ct_expect_max) {
net_warn_ratelimited("nf_conntrack: expectation table full\n");
ret = -EMFILE;
}
out:
return ret;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Patrick McHardy | 101 | 36.33% | 4 | 23.53% |
Martin Josefsson | 100 | 35.97% | 1 | 5.88% |
Pablo Neira Ayuso | 47 | 16.91% | 4 | 23.53% |
Alexey Dobriyan | 16 | 5.76% | 2 | 11.76% |
Eric Dumazet | 8 | 2.88% | 1 | 5.88% |
Florian Westphal | 3 | 1.08% | 2 | 11.76% |
Jarno Rajahalme | 1 | 0.36% | 1 | 5.88% |
Joe Perches | 1 | 0.36% | 1 | 5.88% |
Jesper Dangaard Brouer | 1 | 0.36% | 1 | 5.88% |
Total | 278 | 100.00% | 17 | 100.00% |
int nf_ct_expect_related_report(struct nf_conntrack_expect *expect,
u32 portid, int report)
{
int ret;
spin_lock_bh(&nf_conntrack_expect_lock);
ret = __nf_ct_expect_check(expect);
if (ret < 0)
goto out;
nf_ct_expect_insert(expect);
spin_unlock_bh(&nf_conntrack_expect_lock);
nf_ct_expect_event_report(IPEXP_NEW, expect, portid, report);
return 0;
out:
spin_unlock_bh(&nf_conntrack_expect_lock);
return ret;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Pablo Neira Ayuso | 58 | 75.32% | 2 | 25.00% |
Martin Josefsson | 11 | 14.29% | 1 | 12.50% |
Jesper Dangaard Brouer | 3 | 3.90% | 1 | 12.50% |
Patrick McHardy | 3 | 3.90% | 2 | 25.00% |
Jarno Rajahalme | 2 | 2.60% | 2 | 25.00% |
Total | 77 | 100.00% | 8 | 100.00% |
EXPORT_SYMBOL_GPL(nf_ct_expect_related_report);
#ifdef CONFIG_NF_CONNTRACK_PROCFS
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 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(&nf_ct_expect_hash[st->bucket]));
if (n)
return n;
}
return NULL;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Patrick McHardy | 48 | 64.86% | 2 | 40.00% |
Martin Josefsson | 21 | 28.38% | 1 | 20.00% |
Eric Dumazet | 4 | 5.41% | 1 | 20.00% |
Florian Westphal | 1 | 1.35% | 1 | 20.00% |
Total | 74 | 100.00% | 5 | 100.00% |
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 = rcu_dereference(hlist_next_rcu(head));
while (head == NULL) {
if (++st->bucket >= nf_ct_expect_hsize)
return NULL;
head = rcu_dereference(hlist_first_rcu(&nf_ct_expect_hash[st->bucket]));
}
return head;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Patrick McHardy | 58 | 76.32% | 2 | 40.00% |
Martin Josefsson | 10 | 13.16% | 1 | 20.00% |
Eric Dumazet | 7 | 9.21% | 1 | 20.00% |
Florian Westphal | 1 | 1.32% | 1 | 20.00% |
Total | 76 | 100.00% | 5 | 100.00% |
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;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Patrick McHardy | 55 | 100.00% | 1 | 100.00% |
Total | 55 | 100.00% | 1 | 100.00% |
static void *exp_seq_start(struct seq_file *seq, loff_t *pos)
__acquires
(RCU)
{
rcu_read_lock();
return ct_expect_get_idx(seq, *pos);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Patrick McHardy | 27 | 84.38% | 2 | 50.00% |
Eric Dumazet | 3 | 9.38% | 1 | 25.00% |
Martin Josefsson | 2 | 6.25% | 1 | 25.00% |
Total | 32 | 100.00% | 4 | 100.00% |
static void *exp_seq_next(struct seq_file *seq, void *v, loff_t *pos)
{
(*pos)++;
return ct_expect_get_next(seq, v);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Martin Josefsson | 24 | 70.59% | 1 | 50.00% |
Patrick McHardy | 10 | 29.41% | 1 | 50.00% |
Total | 34 | 100.00% | 2 | 100.00% |
static void exp_seq_stop(struct seq_file *seq, void *v)
__releases
(RCU)
{
rcu_read_unlock();
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Martin Josefsson | 15 | 68.18% | 1 | 25.00% |
Patrick McHardy | 4 | 18.18% | 2 | 50.00% |
Eric Dumazet | 3 | 13.64% | 1 | 25.00% |
Total | 22 | 100.00% | 4 | 100.00% |
static int exp_seq_show(struct seq_file *s, void *v)
{
struct nf_conntrack_expect *expect;
struct nf_conntrack_helper *helper;
struct hlist_node *n = v;
char *delim = "";
expect = hlist_entry(n, struct nf_conntrack_expect, hnode);
if (expect->timeout.function)
seq_printf(s, "%ld ", timer_pending(&expect->timeout)
? (long)(expect->timeout.expires - jiffies)/