[PKT_SCHED]: Introduce simple actions.
And provide an example simply action in order to
demonstrate usage.
Signed-off-by: Jamal Hadi Salim <hadi@cyberus.ca>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/linux/tc_act/tc_defact.h b/include/linux/tc_act/tc_defact.h
new file mode 100644
index 0000000..964f473
--- /dev/null
+++ b/include/linux/tc_act/tc_defact.h
@@ -0,0 +1,21 @@
+#ifndef __LINUX_TC_DEF_H
+#define __LINUX_TC_DEF_H
+
+#include <linux/pkt_cls.h>
+
+struct tc_defact
+{
+ tc_gen;
+};
+
+enum
+{
+ TCA_DEF_UNSPEC,
+ TCA_DEF_TM,
+ TCA_DEF_PARMS,
+ TCA_DEF_DATA,
+ __TCA_DEF_MAX
+};
+#define TCA_DEF_MAX (__TCA_DEF_MAX - 1)
+
+#endif
diff --git a/include/net/act_generic.h b/include/net/act_generic.h
new file mode 100644
index 0000000..95b1207
--- /dev/null
+++ b/include/net/act_generic.h
@@ -0,0 +1,142 @@
+/*
+ * include/net/act_generic.h
+ *
+*/
+#ifndef ACT_GENERIC_H
+#define ACT_GENERIC_H
+static inline int tcf_defact_release(struct tcf_defact *p, int bind)
+{
+ int ret = 0;
+ if (p) {
+ if (bind) {
+ p->bindcnt--;
+ }
+ p->refcnt--;
+ if (p->bindcnt <= 0 && p->refcnt <= 0) {
+ kfree(p->defdata);
+ tcf_hash_destroy(p);
+ ret = 1;
+ }
+ }
+ return ret;
+}
+
+static inline int
+alloc_defdata(struct tcf_defact *p, u32 datalen, void *defdata)
+{
+ p->defdata = kmalloc(datalen, GFP_KERNEL);
+ if (p->defdata == NULL)
+ return -ENOMEM;
+ p->datalen = datalen;
+ memcpy(p->defdata, defdata, datalen);
+ return 0;
+}
+
+static inline int
+realloc_defdata(struct tcf_defact *p, u32 datalen, void *defdata)
+{
+ /* safer to be just brute force for now */
+ kfree(p->defdata);
+ return alloc_defdata(p, datalen, defdata);
+}
+
+static inline int
+tcf_defact_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 *p;
+ 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;
+
+ p = tcf_hash_check(parm->index, a, ovr, bind);
+ if (p == NULL) {
+ p = tcf_hash_create(parm->index, est, a, sizeof(*p), ovr, bind);
+ if (p == NULL)
+ return -ENOMEM;
+
+ ret = alloc_defdata(p, datalen, defdata);
+ if (ret < 0) {
+ kfree(p);
+ return ret;
+ }
+ ret = ACT_P_CREATED;
+ } else {
+ if (!ovr) {
+ tcf_defact_release(p, bind);
+ return -EEXIST;
+ }
+ realloc_defdata(p, datalen, defdata);
+ }
+
+ spin_lock_bh(&p->lock);
+ p->action = parm->action;
+ spin_unlock_bh(&p->lock);
+ if (ret == ACT_P_CREATED)
+ tcf_hash_insert(p);
+ return ret;
+}
+
+static inline int tcf_defact_cleanup(struct tc_action *a, int bind)
+{
+ struct tcf_defact *p = PRIV(a, defact);
+
+ if (p != NULL)
+ return tcf_defact_release(p, bind);
+ return 0;
+}
+
+static inline int
+tcf_defact_dump(struct sk_buff *skb, struct tc_action *a, int bind, int ref)
+{
+ unsigned char *b = skb->tail;
+ struct tc_defact opt;
+ struct tcf_defact *p = PRIV(a, defact);
+ struct tcf_t t;
+
+ opt.index = p->index;
+ opt.refcnt = p->refcnt - ref;
+ opt.bindcnt = p->bindcnt - bind;
+ opt.action = p->action;
+ RTA_PUT(skb, TCA_DEF_PARMS, sizeof(opt), &opt);
+ RTA_PUT(skb, TCA_DEF_DATA, p->datalen, p->defdata);
+ t.install = jiffies_to_clock_t(jiffies - p->tm.install);
+ t.lastuse = jiffies_to_clock_t(jiffies - p->tm.lastuse);
+ t.expires = jiffies_to_clock_t(p->tm.expires);
+ RTA_PUT(skb, TCA_DEF_TM, sizeof(t), &t);
+ return skb->len;
+
+rtattr_failure:
+ skb_trim(skb, b - skb->data);
+ return -1;
+}
+
+#define tca_use_default_ops \
+ .dump = tcf_defact_dump, \
+ .cleanup = tcf_defact_cleanup, \
+ .init = tcf_defact_init, \
+ .walk = tcf_generic_walker, \
+
+#define tca_use_default_defines(name) \
+ static u32 idx_gen; \
+ static struct tcf_defact *tcf_##name_ht[MY_TAB_SIZE]; \
+ static DEFINE_RWLOCK(##name_lock);
+#endif /* _NET_ACT_GENERIC_H */
diff --git a/include/net/tc_act/tc_defact.h b/include/net/tc_act/tc_defact.h
new file mode 100644
index 0000000..463aa67
--- /dev/null
+++ b/include/net/tc_act/tc_defact.h
@@ -0,0 +1,13 @@
+#ifndef __NET_TC_DEF_H
+#define __NET_TC_DEF_H
+
+#include <net/act_api.h>
+
+struct tcf_defact
+{
+ tca_gen(defact);
+ u32 datalen;
+ void *defdata;
+};
+
+#endif