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netfilter: xt_quota: use per-rule spin lock 

Use per-rule spin lock to improve the scalability.

Signed-off-by: Changli Gao <xiaosuo@gmail.com>
Signed-off-by: Patrick McHardy <kaber@trash.net>
This commit is contained in:
Changli Gao 2010-07-23 14:04:03 +02:00 committed by Patrick McHardy
parent f667009ecc
commit b0c81aa566
1 changed files with 5 additions and 5 deletions
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10
net/netfilter/xt_quota.c
View File

@ -11,7 +11,8 @@
#include <linux/netfilter/xt_quota.h>
struct xt_quota_priv {
uint64_t quota;
spinlock_t lock;
uint64_t quota;
};
MODULE_LICENSE("GPL");
@ -20,8 +21,6 @@ MODULE_DESCRIPTION("Xtables: countdown quota match");
MODULE_ALIAS("ipt_quota");
MODULE_ALIAS("ip6t_quota");
static DEFINE_SPINLOCK(quota_lock);
static bool
quota_mt(const struct sk_buff *skb, struct xt_action_param *par)
{
@ -29,7 +28,7 @@ quota_mt(const struct sk_buff *skb, struct xt_action_param *par)
struct xt_quota_priv *priv = q->master;
bool ret = q->flags & XT_QUOTA_INVERT;
spin_lock_bh(&quota_lock);
spin_lock_bh(&priv->lock);
if (priv->quota >= skb->len) {
priv->quota -= skb->len;
ret = !ret;
@ -39,7 +38,7 @@ quota_mt(const struct sk_buff *skb, struct xt_action_param *par)
}
/* Copy quota back to matchinfo so that iptables can display it */
q->quota = priv->quota;
spin_unlock_bh(&quota_lock);
spin_unlock_bh(&priv->lock);
return ret;
}
@ -55,6 +54,7 @@ static int quota_mt_check(const struct xt_mtchk_param *par)
if (q->master == NULL)
return -ENOMEM;
spin_lock_init(&q->master->lock);
q->master->quota = q->quota;
return 0;
}