[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>

8 files changed, 96 insertions, 136 deletions

diff --git a/net/ipv4/netfilter/arp_tables.c b/net/ipv4/netfilter/arp_tables.c
index 4f10b06..aaeaa9c 100644
--- a/net/ipv4/netfilter/arp_tables.c
+++ b/net/ipv4/netfilter/arp_tables.c
@@ -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)
 {
diff --git a/net/ipv4/netfilter/ip_conntrack_core.c b/net/ipv4/netfilter/ip_conntrack_core.c
index 5da25ad..2568d48 100644
--- a/net/ipv4/netfilter/ip_conntrack_core.c
+++ b/net/ipv4/netfilter/ip_conntrack_core.c
@@ -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);
diff --git a/net/ipv4/netfilter/ip_conntrack_proto_gre.c b/net/ipv4/netfilter/ip_conntrack_proto_gre.c
index 4ee016c..92c6d8b 100644
--- a/net/ipv4/netfilter/ip_conntrack_proto_gre.c
+++ b/net/ipv4/netfilter/ip_conntrack_proto_gre.c
@@ -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;
diff --git a/net/ipv4/netfilter/ip_conntrack_standalone.c b/net/ipv4/netfilter/ip_conntrack_standalone.c
index 3f5d495..0213575 100644
--- a/net/ipv4/netfilter/ip_conntrack_standalone.c
+++ b/net/ipv4/netfilter/ip_conntrack_standalone.c
@@ -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
diff --git a/net/ipv4/netfilter/ip_nat_core.c b/net/ipv4/netfilter/ip_nat_core.c
index 4c540d0..71f3e09 100644
--- a/net/ipv4/netfilter/ip_nat_core.c
+++ b/net/ipv4/netfilter/ip_nat_core.c
@@ -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
diff --git a/net/ipv4/netfilter/ip_nat_helper.c b/net/ipv4/netfilter/ip_nat_helper.c
index 021c3da..7f6a759 100644
--- a/net/ipv4/netfilter/ip_nat_helper.c
+++ b/net/ipv4/netfilter/ip_nat_helper.c
@@ -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
diff --git a/net/ipv4/netfilter/ip_nat_rule.c b/net/ipv4/netfilter/ip_nat_rule.c
index e59f5a8..7b70383 100644
--- a/net/ipv4/netfilter/ip_nat_rule.c
+++ b/net/ipv4/netfilter/ip_nat_rule.c
@@ -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
diff --git a/net/ipv4/netfilter/ip_nat_standalone.c b/net/ipv4/netfilter/ip_nat_standalone.c
index f3b7783..9c577db 100644
--- a/net/ipv4/netfilter/ip_nat_standalone.c
+++ b/net/ipv4/netfilter/ip_nat_standalone.c
@@ -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