OpenE2K
/
linux
6
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

[NETFILTER]: kill listhelp.h 

Kill listhelp.h and use the list.h functions instead.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Patrick McHardy 2006-09-20 11:57:53 -07:00 committed by David S. Miller
parent 1bf38a36b6
commit df0933dcb0
15 changed files with 237 additions and 404 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
include/linux/netfilter/x_tables.h
View File

@ -138,10 +138,6 @@ struct xt_counters_info
#include <linux/netdevice.h>
#define ASSERT_READ_LOCK(x)
#define ASSERT_WRITE_LOCK(x)
#include <linux/netfilter_ipv4/listhelp.h>
#ifdef CONFIG_COMPAT
#define COMPAT_TO_USER 1
#define COMPAT_FROM_USER -1

123
include/linux/netfilter_ipv4/listhelp.h
View File

@ -1,123 +0,0 @@
#ifndef _LISTHELP_H
#define _LISTHELP_H
#include <linux/list.h>
/* Header to do more comprehensive job than linux/list.h; assume list
is first entry in structure. */
/* Return pointer to first true entry, if any, or NULL. A macro
required to allow inlining of cmpfn. */
#define LIST_FIND(head, cmpfn, type, args...) \
({ \
const struct list_head *__i, *__j = NULL; \
\
ASSERT_READ_LOCK(head); \
list_for_each(__i, (head)) \
if (cmpfn((const type)__i , ## args)) { \
__j = __i; \
break; \
} \
(type)__j; \
})
#define LIST_FIND_W(head, cmpfn, type, args...) \
({ \
const struct list_head *__i, *__j = NULL; \
\
ASSERT_WRITE_LOCK(head); \
list_for_each(__i, (head)) \
if (cmpfn((type)__i , ## args)) { \
__j = __i; \
break; \
} \
(type)__j; \
})
/* Just like LIST_FIND but we search backwards */
#define LIST_FIND_B(head, cmpfn, type, args...) \
({ \
const struct list_head *__i, *__j = NULL; \
\
ASSERT_READ_LOCK(head); \
list_for_each_prev(__i, (head)) \
if (cmpfn((const type)__i , ## args)) { \
__j = __i; \
break; \
} \
(type)__j; \
})
static inline int
__list_cmp_same(const void *p1, const void *p2) { return p1 == p2; }
/* Is this entry in the list? */
static inline int
list_inlist(struct list_head *head, const void *entry)
{
return LIST_FIND(head, __list_cmp_same, void *, entry) != NULL;
}
/* Delete from list. */
#ifdef CONFIG_NETFILTER_DEBUG
#define LIST_DELETE(head, oldentry) \
do { \
ASSERT_WRITE_LOCK(head); \
if (!list_inlist(head, oldentry)) \
printk("LIST_DELETE: %s:%u `%s'(%p) not in %s.\n", \
__FILE__, __LINE__, #oldentry, oldentry, #head); \
else list_del((struct list_head *)oldentry); \
} while(0)
#else
#define LIST_DELETE(head, oldentry) list_del((struct list_head *)oldentry)
#endif
/* Append. */
static inline void
list_append(struct list_head *head, void *new)
{
ASSERT_WRITE_LOCK(head);
list_add((new), (head)->prev);
}
/* Prepend. */
static inline void
list_prepend(struct list_head *head, void *new)
{
ASSERT_WRITE_LOCK(head);
list_add(new, head);
}
/* Insert according to ordering function; insert before first true. */
#define LIST_INSERT(head, new, cmpfn) \
do { \
struct list_head *__i; \
ASSERT_WRITE_LOCK(head); \
list_for_each(__i, (head)) \
if ((new), (typeof (new))__i) \
break; \
list_add((struct list_head *)(new), __i->prev); \
} while(0)
/* If the field after the list_head is a nul-terminated string, you
can use these functions. */
static inline int __list_cmp_name(const void *i, const char *name)
{
return strcmp(name, i+sizeof(struct list_head)) == 0;
}
/* Returns false if same name already in list, otherwise does insert. */
static inline int
list_named_insert(struct list_head *head, void *new)
{
if (LIST_FIND(head, __list_cmp_name, void *,
new + sizeof(struct list_head)))
return 0;
list_prepend(head, new);
return 1;
}
/* Find this named element in the list. */
#define list_named_find(head, name) \
LIST_FIND(head, __list_cmp_name, void *, name)
#endif /*_LISTHELP_H*/

76
net/bridge/netfilter/ebtables.c
View File

@ -24,6 +24,7 @@
#include <linux/vmalloc.h>
#include <linux/netfilter_bridge/ebtables.h>
#include <linux/spinlock.h>
#include <linux/mutex.h>
#include <asm/uaccess.h>
#include <linux/smp.h>
#include <linux/cpumask.h>
@ -31,12 +32,6 @@
/* needed for logical [in,out]-dev filtering */
#include "../br_private.h"
/* list_named_find */
#define ASSERT_READ_LOCK(x)
#define ASSERT_WRITE_LOCK(x)
#include <linux/netfilter_ipv4/listhelp.h>
#include <linux/mutex.h>
#define BUGPRINT(format, args...) printk("kernel msg: ebtables bug: please "\
"report to author: "format, ## args)
/* #define BUGPRINT(format, args...) */
@ -278,18 +273,22 @@ static inline void *
find_inlist_lock_noload(struct list_head *head, const char *name, int *error,
struct mutex *mutex)
{
void *ret;
struct {
struct list_head list;
char name[EBT_FUNCTION_MAXNAMELEN];
} *e;
*error = mutex_lock_interruptible(mutex);
if (*error != 0)
return NULL;
ret = list_named_find(head, name);
if (!ret) {
*error = -ENOENT;
mutex_unlock(mutex);
list_for_each_entry(e, head, list) {
if (strcmp(e->name, name) == 0)
return e;
}
return ret;
*error = -ENOENT;
mutex_unlock(mutex);
return NULL;
}
#ifndef CONFIG_KMOD
@ -1043,15 +1042,19 @@ free_newinfo:
int ebt_register_target(struct ebt_target *target)
{
struct ebt_target *t;
int ret;
ret = mutex_lock_interruptible(&ebt_mutex);
if (ret != 0)
return ret;
if (!list_named_insert(&ebt_targets, target)) {
mutex_unlock(&ebt_mutex);
return -EEXIST;
list_for_each_entry(t, &ebt_targets, list) {
if (strcmp(t->name, target->name) == 0) {
mutex_unlock(&ebt_mutex);
return -EEXIST;
}
}
list_add(&target->list, &ebt_targets);
mutex_unlock(&ebt_mutex);
return 0;
@ -1060,21 +1063,25 @@ int ebt_register_target(struct ebt_target *target)
void ebt_unregister_target(struct ebt_target *target)
{
mutex_lock(&ebt_mutex);
LIST_DELETE(&ebt_targets, target);
list_del(&target->list);
mutex_unlock(&ebt_mutex);
}
int ebt_register_match(struct ebt_match *match)
{
struct ebt_match *m;
int ret;
ret = mutex_lock_interruptible(&ebt_mutex);
if (ret != 0)
return ret;
if (!list_named_insert(&ebt_matches, match)) {
mutex_unlock(&ebt_mutex);
return -EEXIST;
list_for_each_entry(m, &ebt_matches, list) {
if (strcmp(m->name, match->name) == 0) {
mutex_unlock(&ebt_mutex);
return -EEXIST;
}
}
list_add(&match->list, &ebt_matches);
mutex_unlock(&ebt_mutex);
return 0;
@ -1083,21 +1090,25 @@ int ebt_register_match(struct ebt_match *match)
void ebt_unregister_match(struct ebt_match *match)
{
mutex_lock(&ebt_mutex);
LIST_DELETE(&ebt_matches, match);
list_del(&match->list);
mutex_unlock(&ebt_mutex);
}
int ebt_register_watcher(struct ebt_watcher *watcher)
{
struct ebt_watcher *w;
int ret;
ret = mutex_lock_interruptible(&ebt_mutex);
if (ret != 0)
return ret;
if (!list_named_insert(&ebt_watchers, watcher)) {
mutex_unlock(&ebt_mutex);
return -EEXIST;
list_for_each_entry(w, &ebt_watchers, list) {
if (strcmp(w->name, watcher->name) == 0) {
mutex_unlock(&ebt_mutex);
return -EEXIST;
}
}
list_add(&watcher->list, &ebt_watchers);
mutex_unlock(&ebt_mutex);
return 0;
@ -1106,13 +1117,14 @@ int ebt_register_watcher(struct ebt_watcher *watcher)
void ebt_unregister_watcher(struct ebt_watcher *watcher)
{
mutex_lock(&ebt_mutex);
LIST_DELETE(&ebt_watchers, watcher);
list_del(&watcher->list);
mutex_unlock(&ebt_mutex);
}
int ebt_register_table(struct ebt_table *table)
{
struct ebt_table_info *newinfo;
struct ebt_table *t;
int ret, i, countersize;
if (!table || !table->table ||!table->table->entries ||
@ -1158,10 +1170,12 @@ int ebt_register_table(struct ebt_table *table)
if (ret != 0)
goto free_chainstack;
if (list_named_find(&ebt_tables, table->name)) {
ret = -EEXIST;
BUGPRINT("Table name already exists\n");
goto free_unlock;
list_for_each_entry(t, &ebt_tables, list) {
if (strcmp(t->name, table->name) == 0) {
ret = -EEXIST;
BUGPRINT("Table name already exists\n");
goto free_unlock;
}
}
/* Hold a reference count if the chains aren't empty */
@ -1169,7 +1183,7 @@ int ebt_register_table(struct ebt_table *table)
ret = -ENOENT;
goto free_unlock;
}
list_prepend(&ebt_tables, table);
list_add(&table->list, &ebt_tables);
mutex_unlock(&ebt_mutex);
return 0;
free_unlock:
@ -1195,7 +1209,7 @@ void ebt_unregister_table(struct ebt_table *table)
return;
}
mutex_lock(&ebt_mutex);
LIST_DELETE(&ebt_tables, table);
list_del(&table->list);
mutex_unlock(&ebt_mutex);
vfree(table->private->entries);
if (table->private->chainstack) {
@ -1465,7 +1479,7 @@ static int __init ebtables_init(void)
int ret;
mutex_lock(&ebt_mutex);
list_named_insert(&ebt_targets, &ebt_standard_target);
list_add(&ebt_standard_target.list, &ebt_targets);
mutex_unlock(&ebt_mutex);
if ((ret = nf_register_sockopt(&ebt_sockopts)) < 0)
return ret;

2
net/ipv4/netfilter/arp_tables.c
View File

@ -56,8 +56,6 @@ do { \
#define ARP_NF_ASSERT(x)
#endif
#include <linux/netfilter_ipv4/listhelp.h>
static inline int arp_devaddr_compare(const struct arpt_devaddr_info *ap,
char *hdr_addr, int len)
{

189
net/ipv4/netfilter/ip_conntrack_core.c
View File

@ -47,7 +47,6 @@
#include <linux/netfilter_ipv4/ip_conntrack_protocol.h>
#include <linux/netfilter_ipv4/ip_conntrack_helper.h>
#include <linux/netfilter_ipv4/ip_conntrack_core.h>
#include <linux/netfilter_ipv4/listhelp.h>
#define IP_CONNTRACK_VERSION "2.4"
@ -294,15 +293,10 @@ void ip_ct_remove_expectations(struct ip_conntrack *ct)
static void
clean_from_lists(struct ip_conntrack *ct)
{
unsigned int ho, hr;
DEBUGP("clean_from_lists(%p)\n", ct);
ASSERT_WRITE_LOCK(&ip_conntrack_lock);
ho = hash_conntrack(&ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple);
hr = hash_conntrack(&ct->tuplehash[IP_CT_DIR_REPLY].tuple);
LIST_DELETE(&ip_conntrack_hash[ho], &ct->tuplehash[IP_CT_DIR_ORIGINAL]);
LIST_DELETE(&ip_conntrack_hash[hr], &ct->tuplehash[IP_CT_DIR_REPLY]);
list_del(&ct->tuplehash[IP_CT_DIR_ORIGINAL].list);
list_del(&ct->tuplehash[IP_CT_DIR_REPLY].list);
/* Destroy all pending expectations */
ip_ct_remove_expectations(ct);
@ -367,16 +361,6 @@ static void death_by_timeout(unsigned long ul_conntrack)
ip_conntrack_put(ct);
}
static inline int
conntrack_tuple_cmp(const struct ip_conntrack_tuple_hash *i,
const struct ip_conntrack_tuple *tuple,
const struct ip_conntrack *ignored_conntrack)
{
ASSERT_READ_LOCK(&ip_conntrack_lock);
return tuplehash_to_ctrack(i) != ignored_conntrack
&& ip_ct_tuple_equal(tuple, &i->tuple);
}
struct ip_conntrack_tuple_hash *
__ip_conntrack_find(const struct ip_conntrack_tuple *tuple,
const struct ip_conntrack *ignored_conntrack)
@ -386,7 +370,8 @@ __ip_conntrack_find(const struct ip_conntrack_tuple *tuple,
ASSERT_READ_LOCK(&ip_conntrack_lock);
list_for_each_entry(h, &ip_conntrack_hash[hash], list) {
if (conntrack_tuple_cmp(h, tuple, ignored_conntrack)) {
if (tuplehash_to_ctrack(h) != ignored_conntrack &&
ip_ct_tuple_equal(tuple, &h->tuple)) {
CONNTRACK_STAT_INC(found);
return h;
}
@ -417,10 +402,10 @@ static void __ip_conntrack_hash_insert(struct ip_conntrack *ct,
unsigned int repl_hash)
{
ct->id = ++ip_conntrack_next_id;
list_prepend(&ip_conntrack_hash[hash],
&ct->tuplehash[IP_CT_DIR_ORIGINAL].list);
list_prepend(&ip_conntrack_hash[repl_hash],
&ct->tuplehash[IP_CT_DIR_REPLY].list);
list_add(&ct->tuplehash[IP_CT_DIR_ORIGINAL].list,
&ip_conntrack_hash[hash]);
list_add(&ct->tuplehash[IP_CT_DIR_REPLY].list,
&ip_conntrack_hash[repl_hash]);
}
void ip_conntrack_hash_insert(struct ip_conntrack *ct)
@ -440,6 +425,7 @@ int
__ip_conntrack_confirm(struct sk_buff **pskb)
{
unsigned int hash, repl_hash;
struct ip_conntrack_tuple_hash *h;
struct ip_conntrack *ct;
enum ip_conntrack_info ctinfo;
@ -470,43 +456,43 @@ __ip_conntrack_confirm(struct sk_buff **pskb)
/* See if there's one in the list already, including reverse:
NAT could have grabbed it without realizing, since we're
not in the hash. If there is, we lost race. */
if (!LIST_FIND(&ip_conntrack_hash[hash],
conntrack_tuple_cmp,
struct ip_conntrack_tuple_hash *,
&ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple, NULL)
&& !LIST_FIND(&ip_conntrack_hash[repl_hash],
conntrack_tuple_cmp,
struct ip_conntrack_tuple_hash *,
&ct->tuplehash[IP_CT_DIR_REPLY].tuple, NULL)) {
/* Remove from unconfirmed list */
list_del(&ct->tuplehash[IP_CT_DIR_ORIGINAL].list);
list_for_each_entry(h, &ip_conntrack_hash[hash], list)
if (ip_ct_tuple_equal(&ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple,
&h->tuple))
goto out;
list_for_each_entry(h, &ip_conntrack_hash[repl_hash], list)
if (ip_ct_tuple_equal(&ct->tuplehash[IP_CT_DIR_REPLY].tuple,
&h->tuple))
goto out;
__ip_conntrack_hash_insert(ct, hash, repl_hash);
/* Timer relative to confirmation time, not original
setting time, otherwise we'd get timer wrap in
weird delay cases. */
ct->timeout.expires += jiffies;
add_timer(&ct->timeout);
atomic_inc(&ct->ct_general.use);
set_bit(IPS_CONFIRMED_BIT, &ct->status);
CONNTRACK_STAT_INC(insert);
write_unlock_bh(&ip_conntrack_lock);
if (ct->helper)
ip_conntrack_event_cache(IPCT_HELPER, *pskb);
/* Remove from unconfirmed list */
list_del(&ct->tuplehash[IP_CT_DIR_ORIGINAL].list);
__ip_conntrack_hash_insert(ct, hash, repl_hash);
/* Timer relative to confirmation time, not original
setting time, otherwise we'd get timer wrap in
weird delay cases. */
ct->timeout.expires += jiffies;
add_timer(&ct->timeout);
atomic_inc(&ct->ct_general.use);
set_bit(IPS_CONFIRMED_BIT, &ct->status);
CONNTRACK_STAT_INC(insert);
write_unlock_bh(&ip_conntrack_lock);
if (ct->helper)
ip_conntrack_event_cache(IPCT_HELPER, *pskb);
#ifdef CONFIG_IP_NF_NAT_NEEDED
if (test_bit(IPS_SRC_NAT_DONE_BIT, &ct->status) ||
test_bit(IPS_DST_NAT_DONE_BIT, &ct->status))
ip_conntrack_event_cache(IPCT_NATINFO, *pskb);
if (test_bit(IPS_SRC_NAT_DONE_BIT, &ct->status) ||
test_bit(IPS_DST_NAT_DONE_BIT, &ct->status))
ip_conntrack_event_cache(IPCT_NATINFO, *pskb);
#endif
ip_conntrack_event_cache(master_ct(ct) ?
IPCT_RELATED : IPCT_NEW, *pskb);
ip_conntrack_event_cache(master_ct(ct) ?
IPCT_RELATED : IPCT_NEW, *pskb);
return NF_ACCEPT;
}
return NF_ACCEPT;
out:
CONNTRACK_STAT_INC(insert_failed);
write_unlock_bh(&ip_conntrack_lock);
return NF_DROP;
}
@ -527,23 +513,21 @@ ip_conntrack_tuple_taken(const struct ip_conntrack_tuple *tuple,
/* There's a small race here where we may free a just-assured
connection. Too bad: we're in trouble anyway. */
static inline int unreplied(const struct ip_conntrack_tuple_hash *i)
{
return !(test_bit(IPS_ASSURED_BIT, &tuplehash_to_ctrack(i)->status));
}
static int early_drop(struct list_head *chain)
{
/* Traverse backwards: gives us oldest, which is roughly LRU */
struct ip_conntrack_tuple_hash *h;
struct ip_conntrack *ct = NULL;
struct ip_conntrack *ct = NULL, *tmp;
int dropped = 0;
read_lock_bh(&ip_conntrack_lock);
h = LIST_FIND_B(chain, unreplied, struct ip_conntrack_tuple_hash *);
if (h) {
ct = tuplehash_to_ctrack(h);
atomic_inc(&ct->ct_general.use);
list_for_each_entry_reverse(h, chain, list) {
tmp = tuplehash_to_ctrack(h);
if (!test_bit(IPS_ASSURED_BIT, &tmp->status)) {
ct = tmp;
atomic_inc(&ct->ct_general.use);
break;
}
}
read_unlock_bh(&ip_conntrack_lock);
@ -559,18 +543,16 @@ static int early_drop(struct list_head *chain)
return dropped;
}
static inline int helper_cmp(const struct ip_conntrack_helper *i,
const struct ip_conntrack_tuple *rtuple)
{
return ip_ct_tuple_mask_cmp(rtuple, &i->tuple, &i->mask);
}
static struct ip_conntrack_helper *
__ip_conntrack_helper_find( const struct ip_conntrack_tuple *tuple)
{
return LIST_FIND(&helpers, helper_cmp,
struct ip_conntrack_helper *,
tuple);
struct ip_conntrack_helper *h;
list_for_each_entry(h, &helpers, list) {
if (ip_ct_tuple_mask_cmp(tuple, &h->tuple, &h->mask))
return h;
}
return NULL;
}
struct ip_conntrack_helper *
@ -1062,7 +1044,7 @@ int ip_conntrack_helper_register(struct ip_conntrack_helper *me)
{
BUG_ON(me->timeout == 0);
write_lock_bh(&ip_conntrack_lock);
list_prepend(&helpers, me);
list_add(&me->list, &helpers);
write_unlock_bh(&ip_conntrack_lock);
return 0;
@ -1081,24 +1063,24 @@ __ip_conntrack_helper_find_byname(const char *name)
return NULL;
}
static inline int unhelp(struct ip_conntrack_tuple_hash *i,
const struct ip_conntrack_helper *me)
static inline void unhelp(struct ip_conntrack_tuple_hash *i,
const struct ip_conntrack_helper *me)
{
if (tuplehash_to_ctrack(i)->helper == me) {
ip_conntrack_event(IPCT_HELPER, tuplehash_to_ctrack(i));
tuplehash_to_ctrack(i)->helper = NULL;
}
return 0;
}
void ip_conntrack_helper_unregister(struct ip_conntrack_helper *me)
{
unsigned int i;
struct ip_conntrack_tuple_hash *h;
struct ip_conntrack_expect *exp, *tmp;
/* Need write lock here, to delete helper. */
write_lock_bh(&ip_conntrack_lock);
LIST_DELETE(&helpers, me);
list_del(&me->list);
/* Get rid of expectations */
list_for_each_entry_safe(exp, tmp, &ip_conntrack_expect_list, list) {
@ -1108,10 +1090,12 @@ void ip_conntrack_helper_unregister(struct ip_conntrack_helper *me)
}
}
/* Get rid of expecteds, set helpers to NULL. */
LIST_FIND_W(&unconfirmed, unhelp, struct ip_conntrack_tuple_hash*, me);
for (i = 0; i < ip_conntrack_htable_size; i++)
LIST_FIND_W(&ip_conntrack_hash[i], unhelp,
struct ip_conntrack_tuple_hash *, me);
list_for_each_entry(h, &unconfirmed, list)
unhelp(h, me);
for (i = 0; i < ip_conntrack_htable_size; i++) {
list_for_each_entry(h, &ip_conntrack_hash[i], list)
unhelp(h, me);
}
write_unlock_bh(&ip_conntrack_lock);
/* Someone could be still looking at the helper in a bh. */
@ -1237,46 +1221,43 @@ static void ip_conntrack_attach(struct sk_buff *nskb, struct sk_buff *skb)
nf_conntrack_get(nskb->nfct);
}
static inline int
do_iter(const struct ip_conntrack_tuple_hash *i,
int (*iter)(struct ip_conntrack *i, void *data),
void *data)
{
return iter(tuplehash_to_ctrack(i), data);
}
/* Bring out ya dead! */
static struct ip_conntrack_tuple_hash *
static struct ip_conntrack *
get_next_corpse(int (*iter)(struct ip_conntrack *i, void *data),
void *data, unsigned int *bucket)
{
struct ip_conntrack_tuple_hash *h = NULL;
struct ip_conntrack_tuple_hash *h;
struct ip_conntrack *ct;
write_lock_bh(&ip_conntrack_lock);
for (; *bucket < ip_conntrack_htable_size; (*bucket)++) {
h = LIST_FIND_W(&ip_conntrack_hash[*bucket], do_iter,
struct ip_conntrack_tuple_hash *, iter, data);
if (h)
break;
list_for_each_entry(h, &ip_conntrack_hash[*bucket], list) {
ct = tuplehash_to_ctrack(h);
if (iter(ct, data))
goto found;
}
}
list_for_each_entry(h, &unconfirmed, list) {
ct = tuplehash_to_ctrack(h);
if (iter(ct, data))
goto found;
}
if (!h)
h = LIST_FIND_W(&unconfirmed, do_iter,
struct ip_conntrack_tuple_hash *, iter, data);
if (h)
atomic_inc(&tuplehash_to_ctrack(h)->ct_general.use);
write_unlock_bh(&ip_conntrack_lock);
return NULL;
return h;
found:
atomic_inc(&ct->ct_general.use);
write_unlock_bh(&ip_conntrack_lock);
return ct;
}
void
ip_ct_iterate_cleanup(int (*iter)(struct ip_conntrack *i, void *), void *data)
{
struct ip_conntrack_tuple_hash *h;
struct ip_conntrack *ct;
unsigned int bucket = 0;
while ((h = get_next_corpse(iter, data, &bucket)) != NULL) {
struct ip_conntrack *ct = tuplehash_to_ctrack(h);
while ((ct = get_next_corpse(iter, data, &bucket)) != NULL) {
/* Time to push up daises... */
if (del_timer(&ct->timeout))
death_by_timeout((unsigned long)ct);

24
net/ipv4/netfilter/ip_conntrack_proto_gre.c
View File

@ -37,7 +37,6 @@ static DEFINE_RWLOCK(ip_ct_gre_lock);
#define ASSERT_READ_LOCK(x)
#define ASSERT_WRITE_LOCK(x)
#include <linux/netfilter_ipv4/listhelp.h>
#include <linux/netfilter_ipv4/ip_conntrack_protocol.h>
#include <linux/netfilter_ipv4/ip_conntrack_helper.h>
#include <linux/netfilter_ipv4/ip_conntrack_core.h>
@ -82,10 +81,12 @@ static __be16 gre_keymap_lookup(struct ip_conntrack_tuple *t)
__be16 key = 0;
read_lock_bh(&ip_ct_gre_lock);
km = LIST_FIND(&gre_keymap_list, gre_key_cmpfn,
struct ip_ct_gre_keymap *, t);
if (km)
key = km->tuple.src.u.gre.key;
list_for_each_entry(km, &gre_keymap_list, list) {
if (gre_key_cmpfn(km, t)) {
key = km->tuple.src.u.gre.key;
break;
}
}
read_unlock_bh(&ip_ct_gre_lock);
DEBUGP("lookup src key 0x%x up key for ", key);
@ -99,7 +100,7 @@ int
ip_ct_gre_keymap_add(struct ip_conntrack *ct,
struct ip_conntrack_tuple *t, int reply)
{
struct ip_ct_gre_keymap **exist_km, *km, *old;
struct ip_ct_gre_keymap **exist_km, *km;
if (!ct->helper || strcmp(ct->helper->name, "pptp")) {
DEBUGP("refusing to add GRE keymap to non-pptp session\n");
@ -113,13 +114,10 @@ ip_ct_gre_keymap_add(struct ip_conntrack *ct,
if (*exist_km) {
/* check whether it's a retransmission */
old = LIST_FIND(&gre_keymap_list, gre_key_cmpfn,
struct ip_ct_gre_keymap *, t);
if (old == *exist_km) {
DEBUGP("retransmission\n");
return 0;
list_for_each_entry(km, &gre_keymap_list, list) {
if (gre_key_cmpfn(km, t) && km == *exist_km)
return 0;
}
DEBUGP("trying to override keymap_%s for ct %p\n",
reply? "reply":"orig", ct);
return -EEXIST;
@ -136,7 +134,7 @@ ip_ct_gre_keymap_add(struct ip_conntrack *ct,
DUMP_TUPLE_GRE(&km->tuple);
write_lock_bh(&ip_ct_gre_lock);
list_append(&gre_keymap_list, km);
list_add_tail(&km->list, &gre_keymap_list);
write_unlock_bh(&ip_ct_gre_lock);
return 0;

1
net/ipv4/netfilter/ip_conntrack_standalone.c
View File

@ -35,7 +35,6 @@
#include <linux/netfilter_ipv4/ip_conntrack_protocol.h>
#include <linux/netfilter_ipv4/ip_conntrack_core.h>
#include <linux/netfilter_ipv4/ip_conntrack_helper.h>
#include <linux/netfilter_ipv4/listhelp.h>
#if 0
#define DEBUGP printk

4
net/ipv4/netfilter/ip_nat_core.c
View File

@ -22,9 +22,6 @@
#include <linux/udp.h>
#include <linux/jhash.h>
#define ASSERT_READ_LOCK(x)
#define ASSERT_WRITE_LOCK(x)
#include <linux/netfilter_ipv4/ip_conntrack.h>
#include <linux/netfilter_ipv4/ip_conntrack_core.h>
#include <linux/netfilter_ipv4/ip_conntrack_protocol.h>
@ -33,7 +30,6 @@
#include <linux/netfilter_ipv4/ip_nat_core.h>
#include <linux/netfilter_ipv4/ip_nat_helper.h>
#include <linux/netfilter_ipv4/ip_conntrack_helper.h>
#include <linux/netfilter_ipv4/listhelp.h>
#if 0
#define DEBUGP printk

4
net/ipv4/netfilter/ip_nat_helper.c
View File

@ -27,16 +27,12 @@
#include <net/tcp.h>
#include <net/udp.h>
#define ASSERT_READ_LOCK(x)
#define ASSERT_WRITE_LOCK(x)
#include <linux/netfilter_ipv4/ip_conntrack.h>
#include <linux/netfilter_ipv4/ip_conntrack_helper.h>
#include <linux/netfilter_ipv4/ip_nat.h>
#include <linux/netfilter_ipv4/ip_nat_protocol.h>
#include <linux/netfilter_ipv4/ip_nat_core.h>
#include <linux/netfilter_ipv4/ip_nat_helper.h>
#include <linux/netfilter_ipv4/listhelp.h>
#if 0
#define DEBUGP printk

4
net/ipv4/netfilter/ip_nat_rule.c
View File

@ -19,14 +19,10 @@
#include <net/route.h>
#include <linux/bitops.h>
#define ASSERT_READ_LOCK(x)
#define ASSERT_WRITE_LOCK(x)
#include <linux/netfilter_ipv4/ip_tables.h>
#include <linux/netfilter_ipv4/ip_nat.h>
#include <linux/netfilter_ipv4/ip_nat_core.h>
#include <linux/netfilter_ipv4/ip_nat_rule.h>
#include <linux/netfilter_ipv4/listhelp.h>
#if 0
#define DEBUGP printk

4
net/ipv4/netfilter/ip_nat_standalone.c
View File

@ -30,9 +30,6 @@
#include <net/checksum.h>
#include <linux/spinlock.h>
#define ASSERT_READ_LOCK(x)
#define ASSERT_WRITE_LOCK(x)
#include <linux/netfilter_ipv4/ip_nat.h>
#include <linux/netfilter_ipv4/ip_nat_rule.h>
#include <linux/netfilter_ipv4/ip_nat_protocol.h>
@ -40,7 +37,6 @@
#include <linux/netfilter_ipv4/ip_nat_helper.h>
#include <linux/netfilter_ipv4/ip_tables.h>
#include <linux/netfilter_ipv4/ip_conntrack_core.h>
#include <linux/netfilter_ipv4/listhelp.h>
#if 0
#define DEBUGP printk

3
net/ipv6/netfilter/ip6_tables.c
View File

@ -70,9 +70,6 @@ do { \
#define IP_NF_ASSERT(x)
#endif
#include <linux/netfilter_ipv4/listhelp.h>
#if 0
/* All the better to debug you with... */
#define static

185
net/netfilter/nf_conntrack_core.c
View File

@ -57,7 +57,6 @@
#include <net/netfilter/nf_conntrack_protocol.h>
#include <net/netfilter/nf_conntrack_helper.h>
#include <net/netfilter/nf_conntrack_core.h>
#include <linux/netfilter_ipv4/listhelp.h>
#define NF_CONNTRACK_VERSION "0.5.0"
@ -539,15 +538,10 @@ void nf_ct_remove_expectations(struct nf_conn *ct)
static void
clean_from_lists(struct nf_conn *ct)
{
unsigned int ho, hr;
DEBUGP("clean_from_lists(%p)\n", ct);
ASSERT_WRITE_LOCK(&nf_conntrack_lock);
ho = hash_conntrack(&ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple);
hr = hash_conntrack(&ct->tuplehash[IP_CT_DIR_REPLY].tuple);
LIST_DELETE(&nf_conntrack_hash[ho], &ct->tuplehash[IP_CT_DIR_ORIGINAL]);
LIST_DELETE(&nf_conntrack_hash[hr], &ct->tuplehash[IP_CT_DIR_REPLY]);
list_del(&ct->tuplehash[IP_CT_DIR_ORIGINAL].list);
list_del(&ct->tuplehash[IP_CT_DIR_REPLY].list);
/* Destroy all pending expectations */
nf_ct_remove_expectations(ct);
@ -617,16 +611,6 @@ static void death_by_timeout(unsigned long ul_conntrack)
nf_ct_put(ct);
}
static inline int
conntrack_tuple_cmp(const struct nf_conntrack_tuple_hash *i,
const struct nf_conntrack_tuple *tuple,
const struct nf_conn *ignored_conntrack)
{
ASSERT_READ_LOCK(&nf_conntrack_lock);
return nf_ct_tuplehash_to_ctrack(i) != ignored_conntrack
&& nf_ct_tuple_equal(tuple, &i->tuple);
}
struct nf_conntrack_tuple_hash *
__nf_conntrack_find(const struct nf_conntrack_tuple *tuple,
const struct nf_conn *ignored_conntrack)
@ -636,7 +620,8 @@ __nf_conntrack_find(const struct nf_conntrack_tuple *tuple,
ASSERT_READ_LOCK(&nf_conntrack_lock);
list_for_each_entry(h, &nf_conntrack_hash[hash], list) {
if (conntrack_tuple_cmp(h, tuple, ignored_conntrack)) {
if (nf_ct_tuplehash_to_ctrack(h) != ignored_conntrack &&
nf_ct_tuple_equal(tuple, &h->tuple)) {
NF_CT_STAT_INC(found);
return h;
}
@ -667,10 +652,10 @@ static void __nf_conntrack_hash_insert(struct nf_conn *ct,
unsigned int repl_hash)
{
ct->id = ++nf_conntrack_next_id;
list_prepend(&nf_conntrack_hash[hash],
&ct->tuplehash[IP_CT_DIR_ORIGINAL].list);
list_prepend(&nf_conntrack_hash[repl_hash],
&ct->tuplehash[IP_CT_DIR_REPLY].list);
list_add(&ct->tuplehash[IP_CT_DIR_ORIGINAL].list,
&nf_conntrack_hash[hash]);
list_add(&ct->tuplehash[IP_CT_DIR_REPLY].list,
&nf_conntrack_hash[repl_hash]);
}
void nf_conntrack_hash_insert(struct nf_conn *ct)
@ -690,7 +675,9 @@ int
__nf_conntrack_confirm(struct sk_buff **pskb)
{
unsigned int hash, repl_hash;
struct nf_conntrack_tuple_hash *h;
struct nf_conn *ct;
struct nf_conn_help *help;
enum ip_conntrack_info ctinfo;
ct = nf_ct_get(*pskb, &ctinfo);
@ -720,41 +707,41 @@ __nf_conntrack_confirm(struct sk_buff **pskb)
/* See if there's one in the list already, including reverse:
NAT could have grabbed it without realizing, since we're
not in the hash. If there is, we lost race. */
if (!LIST_FIND(&nf_conntrack_hash[hash],
conntrack_tuple_cmp,
struct nf_conntrack_tuple_hash *,
&ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple, NULL)
&& !LIST_FIND(&nf_conntrack_hash[repl_hash],
conntrack_tuple_cmp,
struct nf_conntrack_tuple_hash *,
&ct->tuplehash[IP_CT_DIR_REPLY].tuple, NULL)) {
struct nf_conn_help *help;
/* Remove from unconfirmed list */
list_del(&ct->tuplehash[IP_CT_DIR_ORIGINAL].list);
list_for_each_entry(h, &nf_conntrack_hash[hash], list)
if (nf_ct_tuple_equal(&ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple,
&h->tuple))
goto out;
list_for_each_entry(h, &nf_conntrack_hash[repl_hash], list)
if (nf_ct_tuple_equal(&ct->tuplehash[IP_CT_DIR_REPLY].tuple,
&h->tuple))
goto out;
__nf_conntrack_hash_insert(ct, hash, repl_hash);
/* Timer relative to confirmation time, not original
setting time, otherwise we'd get timer wrap in
weird delay cases. */
ct->timeout.expires += jiffies;
add_timer(&ct->timeout);
atomic_inc(&ct->ct_general.use);
set_bit(IPS_CONFIRMED_BIT, &ct->status);
NF_CT_STAT_INC(insert);
write_unlock_bh(&nf_conntrack_lock);
help = nfct_help(ct);
if (help && help->helper)
nf_conntrack_event_cache(IPCT_HELPER, *pskb);
/* Remove from unconfirmed list */
list_del(&ct->tuplehash[IP_CT_DIR_ORIGINAL].list);
__nf_conntrack_hash_insert(ct, hash, repl_hash);
/* Timer relative to confirmation time, not original
setting time, otherwise we'd get timer wrap in
weird delay cases. */
ct->timeout.expires += jiffies;
add_timer(&ct->timeout);
atomic_inc(&ct->ct_general.use);
set_bit(IPS_CONFIRMED_BIT, &ct->status);
NF_CT_STAT_INC(insert);
write_unlock_bh(&nf_conntrack_lock);
help = nfct_help(ct);
if (help && help->helper)
nf_conntrack_event_cache(IPCT_HELPER, *pskb);
#ifdef CONFIG_NF_NAT_NEEDED
if (test_bit(IPS_SRC_NAT_DONE_BIT, &ct->status) ||
test_bit(IPS_DST_NAT_DONE_BIT, &ct->status))
nf_conntrack_event_cache(IPCT_NATINFO, *pskb);
if (test_bit(IPS_SRC_NAT_DONE_BIT, &ct->status) ||
test_bit(IPS_DST_NAT_DONE_BIT, &ct->status))
nf_conntrack_event_cache(IPCT_NATINFO, *pskb);
#endif
nf_conntrack_event_cache(master_ct(ct) ?
IPCT_RELATED : IPCT_NEW, *pskb);
return NF_ACCEPT;
}
nf_conntrack_event_cache(master_ct(ct) ?
IPCT_RELATED : IPCT_NEW, *pskb);
return NF_ACCEPT;
out:
NF_CT_STAT_INC(insert_failed);
write_unlock_bh(&nf_conntrack_lock);
return NF_DROP;
@ -777,24 +764,21 @@ nf_conntrack_tuple_taken(const struct nf_conntrack_tuple *tuple,
/* There's a small race here where we may free a just-assured
connection. Too bad: we're in trouble anyway. */
static inline int unreplied(const struct nf_conntrack_tuple_hash *i)
{
return !(test_bit(IPS_ASSURED_BIT,
&nf_ct_tuplehash_to_ctrack(i)->status));
}
static int early_drop(struct list_head *chain)
{
/* Traverse backwards: gives us oldest, which is roughly LRU */
struct nf_conntrack_tuple_hash *h;
struct nf_conn *ct = NULL;
struct nf_conn *ct = NULL, *tmp;
int dropped = 0;
read_lock_bh(&nf_conntrack_lock);
h = LIST_FIND_B(chain, unreplied, struct nf_conntrack_tuple_hash *);
if (h) {
ct = nf_ct_tuplehash_to_ctrack(h);
atomic_inc(&ct->ct_general.use);
list_for_each_entry_reverse(h, chain, list) {
tmp = nf_ct_tuplehash_to_ctrack(h);
if (!test_bit(IPS_ASSURED_BIT, &tmp->status)) {
ct = tmp;
atomic_inc(&ct->ct_general.use);
break;
}
}
read_unlock_bh(&nf_conntrack_lock);
@ -810,18 +794,16 @@ static int early_drop(struct list_head *chain)
return dropped;
}
static inline int helper_cmp(const struct nf_conntrack_helper *i,
const struct nf_conntrack_tuple *rtuple)
{
return nf_ct_tuple_mask_cmp(rtuple, &i->tuple, &i->mask);
}
static struct nf_conntrack_helper *
__nf_ct_helper_find(const struct nf_conntrack_tuple *tuple)
{
return LIST_FIND(&helpers, helper_cmp,
struct nf_conntrack_helper *,
tuple);
struct nf_conntrack_helper *h;
list_for_each_entry(h, &helpers, list) {
if (nf_ct_tuple_mask_cmp(tuple, &h->tuple, &h->mask))
return h;
}
return NULL;
}
struct nf_conntrack_helper *
@ -1323,7 +1305,7 @@ int nf_conntrack_helper_register(struct nf_conntrack_helper *me)
return ret;
}
write_lock_bh(&nf_conntrack_lock);
list_prepend(&helpers, me);
list_add(&me->list, &helpers);
write_unlock_bh(&nf_conntrack_lock);
return 0;
@ -1342,8 +1324,8 @@ __nf_conntrack_helper_find_byname(const char *name)
return NULL;
}
static inline int unhelp(struct nf_conntrack_tuple_hash *i,
const struct nf_conntrack_helper *me)
static inline void unhelp(struct nf_conntrack_tuple_hash *i,
const struct nf_conntrack_helper *me)
{
struct nf_conn *ct = nf_ct_tuplehash_to_ctrack(i);
struct nf_conn_help *help = nfct_help(ct);
@ -1352,17 +1334,17 @@ static inline int unhelp(struct nf_conntrack_tuple_hash *i,
nf_conntrack_event(IPCT_HELPER, ct);
help->helper = NULL;
}
return 0;
}
void nf_conntrack_helper_unregister(struct nf_conntrack_helper *me)
{
unsigned int i;
struct nf_conntrack_tuple_hash *h;
struct nf_conntrack_expect *exp, *tmp;
/* Need write lock here, to delete helper. */
write_lock_bh(&nf_conntrack_lock);
LIST_DELETE(&helpers, me);
list_del(&me->list);
/* Get rid of expectations */
list_for_each_entry_safe(exp, tmp, &nf_conntrack_expect_list, list) {
@ -1374,10 +1356,12 @@ void nf_conntrack_helper_unregister(struct nf_conntrack_helper *me)
}
/* Get rid of expecteds, set helpers to NULL. */
LIST_FIND_W(&unconfirmed, unhelp, struct nf_conntrack_tuple_hash*, me);
for (i = 0; i < nf_conntrack_htable_size; i++)
LIST_FIND_W(&nf_conntrack_hash[i], unhelp,
struct nf_conntrack_tuple_hash *, me);
list_for_each_entry(h, &unconfirmed, list)
unhelp(h, me);
for (i = 0; i < nf_conntrack_htable_size; i++) {
list_for_each_entry(h, &nf_conntrack_hash[i], list)
unhelp(h, me);
}
write_unlock_bh(&nf_conntrack_lock);
/* Someone could be still looking at the helper in a bh. */
@ -1510,37 +1494,40 @@ do_iter(const struct nf_conntrack_tuple_hash *i,
}
/* Bring out ya dead! */
static struct nf_conntrack_tuple_hash *
static struct nf_conn *
get_next_corpse(int (*iter)(struct nf_conn *i, void *data),
void *data, unsigned int *bucket)
{
struct nf_conntrack_tuple_hash *h = NULL;
struct nf_conntrack_tuple_hash *h;
struct nf_conn *ct;
write_lock_bh(&nf_conntrack_lock);
for (; *bucket < nf_conntrack_htable_size; (*bucket)++) {
h = LIST_FIND_W(&nf_conntrack_hash[*bucket], do_iter,
struct nf_conntrack_tuple_hash *, iter, data);
if (h)
break;
list_for_each_entry(h, &nf_conntrack_hash[*bucket], list) {
ct = nf_ct_tuplehash_to_ctrack(h);
if (iter(ct, data))
goto found;
}
}
if (!h)
h = LIST_FIND_W(&unconfirmed, do_iter,
struct nf_conntrack_tuple_hash *, iter, data);
if (h)
atomic_inc(&nf_ct_tuplehash_to_ctrack(h)->ct_general.use);
list_for_each_entry(h, &unconfirmed, list) {
ct = nf_ct_tuplehash_to_ctrack(h);
if (iter(ct, data))
goto found;
}
return NULL;
found:
atomic_inc(&nf_ct_tuplehash_to_ctrack(h)->ct_general.use);
write_unlock_bh(&nf_conntrack_lock);
return h;
return ct;
}
void
nf_ct_iterate_cleanup(int (*iter)(struct nf_conn *i, void *data), void *data)
{
struct nf_conntrack_tuple_hash *h;
struct nf_conn *ct;
unsigned int bucket = 0;
while ((h = get_next_corpse(iter, data, &bucket)) != NULL) {
struct nf_conn *ct = nf_ct_tuplehash_to_ctrack(h);
while ((ct = get_next_corpse(iter, data, &bucket)) != NULL) {
/* Time to push up daises... */
if (del_timer(&ct->timeout))
death_by_timeout((unsigned long)ct);

1
net/netfilter/nf_conntrack_standalone.c
View File

@ -37,7 +37,6 @@
#include <net/netfilter/nf_conntrack_protocol.h>
#include <net/netfilter/nf_conntrack_core.h>
#include <net/netfilter/nf_conntrack_helper.h>
#include <linux/netfilter_ipv4/listhelp.h>
#if 0
#define DEBUGP printk

17
net/netfilter/x_tables.c
View File

@ -81,7 +81,7 @@ xt_unregister_target(struct xt_target *target)
int af = target->family;
mutex_lock(&xt[af].mutex);
LIST_DELETE(&xt[af].target, target);
list_del(&target->list);
mutex_unlock(&xt[af].mutex);
}
EXPORT_SYMBOL(xt_unregister_target);
@ -138,7 +138,7 @@ xt_unregister_match(struct xt_match *match)
int af = match->family;
mutex_lock(&xt[af].mutex);
LIST_DELETE(&xt[af].match, match);
list_del(&match->list);
mutex_unlock(&xt[af].mutex);
}
EXPORT_SYMBOL(xt_unregister_match);
@ -575,15 +575,18 @@ int xt_register_table(struct xt_table *table,
{
int ret;
struct xt_table_info *private;
struct xt_table *t;
ret = mutex_lock_interruptible(&xt[table->af].mutex);
if (ret != 0)
return ret;
/* Don't autoload: we'd eat our tail... */
if (list_named_find(&xt[table->af].tables, table->name)) {
ret = -EEXIST;
goto unlock;
list_for_each_entry(t, &xt[table->af].tables, list) {
if (strcmp(t->name, table->name) == 0) {
ret = -EEXIST;
goto unlock;
}
}
/* Simplifies replace_table code. */
@ -598,7 +601,7 @@ int xt_register_table(struct xt_table *table,
/* save number of initial entries */
private->initial_entries = private->number;
list_prepend(&xt[table->af].tables, table);
list_add(&table->list, &xt[table->af].tables);
ret = 0;
unlock:
@ -613,7 +616,7 @@ void *xt_unregister_table(struct xt_table *table)
mutex_lock(&xt[table->af].mutex);
private = table->private;
LIST_DELETE(&xt[table->af].tables, table);
list_del(&table->list);
mutex_unlock(&xt[table->af].mutex);
return private;