Merge branch 'pandora-27-omap1' into rev2

[pandora-kernel.git] / net / netfilter / xt_limit.c

diff --git a/net/netfilter/xt_limit.c b/net/netfilter/xt_limit.c
index 571a72a..aad9ab8 100644 (file)
--- a/net/netfilter/xt_limit.c
+++ b/net/netfilter/xt_limit.c
@@ -1,5 +1,5 @@
-/* (C) 1999 Jérôme de Vivie <devivie@info.enserb.u-bordeaux.fr>
- * (C) 1999 Hervé Eychenne <eychenne@info.enserb.u-bordeaux.fr>
+/* (C) 1999 Jérôme de Vivie <devivie@info.enserb.u-bordeaux.fr>
+ * (C) 1999 Hervé Eychenne <eychenne@info.enserb.u-bordeaux.fr>
  *
  * 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
@@ -16,7 +16,7 @@
 
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("Herve Eychenne <rv@wallfire.org>");
-MODULE_DESCRIPTION("iptables rate limit match");
+MODULE_DESCRIPTION("Xtables: rate-limit match");
 MODULE_ALIAS("ipt_limit");
 MODULE_ALIAS("ip6t_limit");
 
@@ -57,17 +57,14 @@ static DEFINE_SPINLOCK(limit_lock);
 
 #define CREDITS_PER_JIFFY POW2_BELOW32(MAX_CPJ)
 
-static int
-ipt_limit_match(const struct sk_buff *skb,
-               const struct net_device *in,
-               const struct net_device *out,
-               const struct xt_match *match,
-               const void *matchinfo,
-               int offset,
-               unsigned int protoff,
-               int *hotdrop)
+static bool
+limit_mt(const struct sk_buff *skb, const struct net_device *in,
+         const struct net_device *out, const struct xt_match *match,
+         const void *matchinfo, int offset, unsigned int protoff,
+         bool *hotdrop)
 {
-       struct xt_rateinfo *r = ((struct xt_rateinfo *)matchinfo)->master;
+       struct xt_rateinfo *r =
+               ((const struct xt_rateinfo *)matchinfo)->master;
        unsigned long now = jiffies;
 
        spin_lock_bh(&limit_lock);
@@ -79,11 +76,11 @@ ipt_limit_match(const struct sk_buff *skb,
                /* We're not limited. */
                r->credit -= r->cost;
                spin_unlock_bh(&limit_lock);
-               return 1;
+               return true;
        }
 
        spin_unlock_bh(&limit_lock);
-       return 0;
+       return false;
 }
 
 /* Precision saver. */
@@ -98,12 +95,10 @@ user2credits(u_int32_t user)
        return (user * HZ * CREDITS_PER_JIFFY) / XT_LIMIT_SCALE;
 }
 
-static int
-ipt_limit_checkentry(const char *tablename,
-                    const void *inf,
-                    const struct xt_match *match,
-                    void *matchinfo,
-                    unsigned int hook_mask)
+static bool
+limit_mt_check(const char *tablename, const void *inf,
+               const struct xt_match *match, void *matchinfo,
+               unsigned int hook_mask)
 {
        struct xt_rateinfo *r = matchinfo;
 
@@ -112,7 +107,7 @@ ipt_limit_checkentry(const char *tablename,
            || user2credits(r->avg * r->burst) < user2credits(r->avg)) {
                printk("Overflow in xt_limit, try lower: %u/%u\n",
                       r->avg, r->burst);
-               return 0;
+               return false;
        }
 
        /* For SMP, we only want to use one set of counters. */
@@ -125,7 +120,7 @@ ipt_limit_checkentry(const char *tablename,
                r->credit_cap = user2credits(r->avg * r->burst); /* Credits full. */
                r->cost = user2credits(r->avg);
        }
-       return 1;
+       return true;
 }
 
 #ifdef CONFIG_COMPAT
@@ -142,9 +137,9 @@ struct compat_xt_rateinfo {
 
 /* To keep the full "prev" timestamp, the upper 32 bits are stored in the
  * master pointer, which does not need to be preserved. */
-static void compat_from_user(void *dst, void *src)
+static void limit_mt_compat_from_user(void *dst, void *src)
 {
-       struct compat_xt_rateinfo *cm = src;
+       const struct compat_xt_rateinfo *cm = src;
        struct xt_rateinfo m = {
                .avg            = cm->avg,
                .burst          = cm->burst,
@@ -156,9 +151,9 @@ static void compat_from_user(void *dst, void *src)
        memcpy(dst, &m, sizeof(m));
 }
 
-static int compat_to_user(void __user *dst, void *src)
+static int limit_mt_compat_to_user(void __user *dst, void *src)
 {
-       struct xt_rateinfo *m = src;
+       const struct xt_rateinfo *m = src;
        struct compat_xt_rateinfo cm = {
                .avg            = m->avg,
                .burst          = m->burst,
@@ -172,39 +167,44 @@ static int compat_to_user(void __user *dst, void *src)
 }
 #endif /* CONFIG_COMPAT */
 
-static struct xt_match xt_limit_match[] = {
+static struct xt_match limit_mt_reg[] __read_mostly = {
        {
                .name           = "limit",
                .family         = AF_INET,
-               .checkentry     = ipt_limit_checkentry,
-               .match          = ipt_limit_match,
+               .checkentry     = limit_mt_check,
+               .match          = limit_mt,
                .matchsize      = sizeof(struct xt_rateinfo),
 #ifdef CONFIG_COMPAT
                .compatsize     = sizeof(struct compat_xt_rateinfo),
-               .compat_from_user = compat_from_user,
-               .compat_to_user = compat_to_user,
+               .compat_from_user = limit_mt_compat_from_user,
+               .compat_to_user = limit_mt_compat_to_user,
 #endif
                .me             = THIS_MODULE,
        },
        {
                .name           = "limit",
                .family         = AF_INET6,
-               .checkentry     = ipt_limit_checkentry,
-               .match          = ipt_limit_match,
+               .checkentry     = limit_mt_check,
+               .match          = limit_mt,
                .matchsize      = sizeof(struct xt_rateinfo),
+#ifdef CONFIG_COMPAT
+               .compatsize     = sizeof(struct compat_xt_rateinfo),
+               .compat_from_user = limit_mt_compat_from_user,
+               .compat_to_user = limit_mt_compat_to_user,
+#endif
                .me             = THIS_MODULE,
        },
 };
 
-static int __init xt_limit_init(void)
+static int __init limit_mt_init(void)
 {
-       return xt_register_matches(xt_limit_match, ARRAY_SIZE(xt_limit_match));
+       return xt_register_matches(limit_mt_reg, ARRAY_SIZE(limit_mt_reg));
 }
 
-static void __exit xt_limit_fini(void)
+static void __exit limit_mt_exit(void)
 {
-       xt_unregister_matches(xt_limit_match, ARRAY_SIZE(xt_limit_match));
+       xt_unregister_matches(limit_mt_reg, ARRAY_SIZE(limit_mt_reg));
 }
 
-module_init(xt_limit_init);
-module_exit(xt_limit_fini);
+module_init(limit_mt_init);
+module_exit(limit_mt_exit);