Add support for the MAX3100 SPI UART.

[linux-2.6-omap-h63xx.git] / net / netfilter / xt_statistic.c

diff --git a/net/netfilter/xt_statistic.c b/net/netfilter/xt_statistic.c
index 0d75141139d5f7d96045f12c6e5d341fb44eb60e..d8c0f8f1a78e3a2c5c6ae96edb94f76258a410cf 100644 (file)
--- a/net/netfilter/xt_statistic.c
+++ b/net/netfilter/xt_statistic.c
@@ -16,6 +16,10 @@
 #include <linux/netfilter/xt_statistic.h>
 #include <linux/netfilter/x_tables.h>
 
+struct xt_statistic_priv {
+       uint32_t count;
+};
+
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
 MODULE_DESCRIPTION("Xtables: statistics-based matching (\"Nth\", random)");
@@ -27,7 +31,7 @@ static DEFINE_SPINLOCK(nth_lock);
 static bool
 statistic_mt(const struct sk_buff *skb, const struct xt_match_param *par)
 {
-       struct xt_statistic_info *info = (void *)par->matchinfo;
+       const struct xt_statistic_info *info = par->matchinfo;
        bool ret = info->flags & XT_STATISTIC_INVERT;
 
        switch (info->mode) {
@@ -36,10 +40,9 @@ statistic_mt(const struct sk_buff *skb, const struct xt_match_param *par)
                        ret = !ret;
                break;
        case XT_STATISTIC_MODE_NTH:
-               info = info->master;
                spin_lock_bh(&nth_lock);
-               if (info->u.nth.count++ == info->u.nth.every) {
-                       info->u.nth.count = 0;
+               if (info->master->count++ == info->u.nth.every) {
+                       info->master->count = 0;
                        ret = !ret;
                }
                spin_unlock_bh(&nth_lock);
@@ -56,16 +59,31 @@ static bool statistic_mt_check(const struct xt_mtchk_param *par)
        if (info->mode > XT_STATISTIC_MODE_MAX ||
            info->flags & ~XT_STATISTIC_MASK)
                return false;
-       info->master = info;
+
+       info->master = kzalloc(sizeof(*info->master), GFP_KERNEL);
+       if (info->master == NULL) {
+               printk(KERN_ERR KBUILD_MODNAME ": Out of memory\n");
+               return false;
+       }
+       info->master->count = info->u.nth.count;
+
        return true;
 }
 
+static void statistic_mt_destroy(const struct xt_mtdtor_param *par)
+{
+       const struct xt_statistic_info *info = par->matchinfo;
+
+       kfree(info->master);
+}
+
 static struct xt_match xt_statistic_mt_reg __read_mostly = {
        .name       = "statistic",
        .revision   = 0,
        .family     = NFPROTO_UNSPEC,
        .match      = statistic_mt,
        .checkentry = statistic_mt_check,
+       .destroy    = statistic_mt_destroy,
        .matchsize  = sizeof(struct xt_statistic_info),
        .me         = THIS_MODULE,
 };