MODULE_LICENSE("GPL");
MODULE_AUTHOR("Sam Johnston <samj@samj.net>");
+MODULE_DESCRIPTION("Xtables: countdown quota match");
MODULE_ALIAS("ipt_quota");
MODULE_ALIAS("ip6t_quota");
static DEFINE_SPINLOCK(quota_lock);
-static int
-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
+quota_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_quota_info *q = ((struct xt_quota_info *)matchinfo)->master;
- int ret = q->flags & XT_QUOTA_INVERT ? 1 : 0;
+ struct xt_quota_info *q =
+ ((const struct xt_quota_info *)matchinfo)->master;
+ bool ret = q->flags & XT_QUOTA_INVERT;
spin_lock_bh("a_lock);
if (q->quota >= skb->len) {
q->quota -= skb->len;
- ret ^= 1;
+ ret = !ret;
} else {
- /* we do not allow even small packets from now on */
- q->quota = 0;
+ /* we do not allow even small packets from now on */
+ q->quota = 0;
}
spin_unlock_bh("a_lock);
return ret;
}
-static int
-checkentry(const char *tablename, const void *entry,
- const struct xt_match *match, void *matchinfo,
- unsigned int hook_mask)
+static bool
+quota_mt_check(const char *tablename, const void *entry,
+ const struct xt_match *match, void *matchinfo,
+ unsigned int hook_mask)
{
- struct xt_quota_info *q = (struct xt_quota_info *)matchinfo;
+ struct xt_quota_info *q = matchinfo;
if (q->flags & ~XT_QUOTA_MASK)
- return 0;
+ return false;
/* For SMP, we only want to use one set of counters. */
q->master = q;
- return 1;
+ return true;
}
-static struct xt_match xt_quota_match[] = {
+static struct xt_match quota_mt_reg[] __read_mostly = {
{
.name = "quota",
.family = AF_INET,
- .checkentry = checkentry,
- .match = match,
+ .checkentry = quota_mt_check,
+ .match = quota_mt,
.matchsize = sizeof(struct xt_quota_info),
.me = THIS_MODULE
},
{
.name = "quota",
.family = AF_INET6,
- .checkentry = checkentry,
- .match = match,
+ .checkentry = quota_mt_check,
+ .match = quota_mt,
.matchsize = sizeof(struct xt_quota_info),
.me = THIS_MODULE
},
};
-static int __init xt_quota_init(void)
+static int __init quota_mt_init(void)
{
- return xt_register_matches(xt_quota_match, ARRAY_SIZE(xt_quota_match));
+ return xt_register_matches(quota_mt_reg, ARRAY_SIZE(quota_mt_reg));
}
-static void __exit xt_quota_fini(void)
+static void __exit quota_mt_exit(void)
{
- xt_unregister_matches(xt_quota_match, ARRAY_SIZE(xt_quota_match));
+ xt_unregister_matches(quota_mt_reg, ARRAY_SIZE(quota_mt_reg));
}
-module_init(xt_quota_init);
-module_exit(xt_quota_fini);
+module_init(quota_mt_init);
+module_exit(quota_mt_exit);