*
*/
-#include <linux/config.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/kernel.h>
#define TCA_ACT_SIMP 22
-/* XXX: Hide all these common elements under some macro
- * probably
-*/
#include <linux/tc_act/tc_defact.h>
#include <net/tc_act/tc_defact.h>
-/* use generic hash table with 8 buckets */
-#define MY_TAB_SIZE 8
-#define MY_TAB_MASK (MY_TAB_SIZE - 1)
-static u32 idx_gen;
-static struct tcf_defact *tcf_simp_ht[MY_TAB_SIZE];
+#define SIMP_TAB_MASK 7
+static struct tcf_common *tcf_simp_ht[SIMP_TAB_MASK + 1];
+static u32 simp_idx_gen;
static DEFINE_RWLOCK(simp_lock);
-/* override the defaults */
-#define tcf_st tcf_defact
-#define tc_st tc_defact
-#define tcf_t_lock simp_lock
-#define tcf_ht tcf_simp_ht
-
-#define CONFIG_NET_ACT_INIT 1
-#include <net/pkt_act.h>
-#include <net/act_generic.h>
+static struct tcf_hashinfo simp_hash_info = {
+ .htab = tcf_simp_ht,
+ .hmask = SIMP_TAB_MASK,
+ .lock = &simp_lock,
+};
static int tcf_simp(struct sk_buff *skb, struct tc_action *a, struct tcf_result *res)
{
- struct tcf_defact *p = PRIV(a, defact);
+ struct tcf_defact *d = a->priv;
- spin_lock(&p->lock);
- p->tm.lastuse = jiffies;
- p->bstats.bytes += skb->len;
- p->bstats.packets++;
+ spin_lock(&d->tcf_lock);
+ d->tcf_tm.lastuse = jiffies;
+ d->tcf_bstats.bytes += skb->len;
+ d->tcf_bstats.packets++;
/* print policy string followed by _ then packet count
* Example if this was the 3rd packet and the string was "hello"
* then it would look like "hello_3" (without quotes)
**/
- printk("simple: %s_%d\n", (char *)p->defdata, p->bstats.packets);
- spin_unlock(&p->lock);
- return p->action;
+ printk("simple: %s_%d\n",
+ (char *)d->tcfd_defdata, d->tcf_bstats.packets);
+ spin_unlock(&d->tcf_lock);
+ return d->tcf_action;
+}
+
+static int tcf_simp_release(struct tcf_defact *d, int bind)
+{
+ int ret = 0;
+ if (d) {
+ if (bind)
+ d->tcf_bindcnt--;
+ d->tcf_refcnt--;
+ if (d->tcf_bindcnt <= 0 && d->tcf_refcnt <= 0) {
+ kfree(d->tcfd_defdata);
+ tcf_hash_destroy(&d->common, &simp_hash_info);
+ ret = 1;
+ }
+ }
+ return ret;
+}
+
+static int alloc_defdata(struct tcf_defact *d, u32 datalen, void *defdata)
+{
+ d->tcfd_defdata = kmalloc(datalen, GFP_KERNEL);
+ if (unlikely(!d->tcfd_defdata))
+ return -ENOMEM;
+ d->tcfd_datalen = datalen;
+ memcpy(d->tcfd_defdata, defdata, datalen);
+ return 0;
+}
+
+static int realloc_defdata(struct tcf_defact *d, u32 datalen, void *defdata)
+{
+ kfree(d->tcfd_defdata);
+ return alloc_defdata(d, datalen, defdata);
+}
+
+static int tcf_simp_init(struct rtattr *rta, struct rtattr *est,
+ struct tc_action *a, int ovr, int bind)
+{
+ struct rtattr *tb[TCA_DEF_MAX];
+ struct tc_defact *parm;
+ struct tcf_defact *d;
+ struct tcf_common *pc;
+ void *defdata;
+ u32 datalen = 0;
+ int ret = 0;
+
+ if (rta == NULL || rtattr_parse_nested(tb, TCA_DEF_MAX, rta) < 0)
+ return -EINVAL;
+
+ if (tb[TCA_DEF_PARMS - 1] == NULL ||
+ RTA_PAYLOAD(tb[TCA_DEF_PARMS - 1]) < sizeof(*parm))
+ return -EINVAL;
+
+ parm = RTA_DATA(tb[TCA_DEF_PARMS - 1]);
+ defdata = RTA_DATA(tb[TCA_DEF_DATA - 1]);
+ if (defdata == NULL)
+ return -EINVAL;
+
+ datalen = RTA_PAYLOAD(tb[TCA_DEF_DATA - 1]);
+ if (datalen <= 0)
+ return -EINVAL;
+
+ pc = tcf_hash_check(parm->index, a, bind, &simp_hash_info);
+ if (!pc) {
+ pc = tcf_hash_create(parm->index, est, a, sizeof(*d), bind,
+ &simp_idx_gen, &simp_hash_info);
+ if (unlikely(!pc))
+ return -ENOMEM;
+
+ d = to_defact(pc);
+ ret = alloc_defdata(d, datalen, defdata);
+ if (ret < 0) {
+ kfree(pc);
+ return ret;
+ }
+ ret = ACT_P_CREATED;
+ } else {
+ d = to_defact(pc);
+ if (!ovr) {
+ tcf_simp_release(d, bind);
+ return -EEXIST;
+ }
+ realloc_defdata(d, datalen, defdata);
+ }
+
+ spin_lock_bh(&d->tcf_lock);
+ d->tcf_action = parm->action;
+ spin_unlock_bh(&d->tcf_lock);
+
+ if (ret == ACT_P_CREATED)
+ tcf_hash_insert(pc, &simp_hash_info);
+ return ret;
+}
+
+static inline int tcf_simp_cleanup(struct tc_action *a, int bind)
+{
+ struct tcf_defact *d = a->priv;
+
+ if (d)
+ return tcf_simp_release(d, bind);
+ return 0;
+}
+
+static inline int tcf_simp_dump(struct sk_buff *skb, struct tc_action *a,
+ int bind, int ref)
+{
+ unsigned char *b = skb->tail;
+ struct tcf_defact *d = a->priv;
+ struct tc_defact opt;
+ struct tcf_t t;
+
+ opt.index = d->tcf_index;
+ opt.refcnt = d->tcf_refcnt - ref;
+ opt.bindcnt = d->tcf_bindcnt - bind;
+ opt.action = d->tcf_action;
+ RTA_PUT(skb, TCA_DEF_PARMS, sizeof(opt), &opt);
+ RTA_PUT(skb, TCA_DEF_DATA, d->tcfd_datalen, d->tcfd_defdata);
+ t.install = jiffies_to_clock_t(jiffies - d->tcf_tm.install);
+ t.lastuse = jiffies_to_clock_t(jiffies - d->tcf_tm.lastuse);
+ t.expires = jiffies_to_clock_t(d->tcf_tm.expires);
+ RTA_PUT(skb, TCA_DEF_TM, sizeof(t), &t);
+ return skb->len;
+
+rtattr_failure:
+ skb_trim(skb, b - skb->data);
+ return -1;
}
static struct tc_action_ops act_simp_ops = {
- .kind = "simple",
- .type = TCA_ACT_SIMP,
- .capab = TCA_CAP_NONE,
- .owner = THIS_MODULE,
- .act = tcf_simp,
- tca_use_default_ops
+ .kind = "simple",
+ .hinfo = &simp_hash_info,
+ .type = TCA_ACT_SIMP,
+ .capab = TCA_CAP_NONE,
+ .owner = THIS_MODULE,
+ .act = tcf_simp,
+ .dump = tcf_simp_dump,
+ .cleanup = tcf_simp_cleanup,
+ .init = tcf_simp_init,
+ .walk = tcf_generic_walker,
};
MODULE_AUTHOR("Jamal Hadi Salim(2005)");
git.samba.org / sfrench / cifs-2.6.git / blobdiff