[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..463aa671
--- /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
diff --git a/net/sched/Kconfig b/net/sched/Kconfig
index 3d1d902..9c118ba 100644
--- a/net/sched/Kconfig
+++ b/net/sched/Kconfig
@@ -506,3 +506,13 @@
Say Y to support traffic policing (bandwidth limits). Needed for
ingress and egress rate limiting.
+config NET_ACT_SIMP
+ tristate "Simple action"
+ depends on NET_CLS_ACT
+ ---help---
+ You must have new iproute2 to use this feature.
+ This adds a very simple action for demonstration purposes
+ The idea is to give action authors a basic example to look at.
+ All this action will do is print on the console the configured
+ policy string followed by _ then packet count.
+
diff --git a/net/sched/Makefile b/net/sched/Makefile
index 431e557..eb3fe58 100644
--- a/net/sched/Makefile
+++ b/net/sched/Makefile
@@ -6,13 +6,14 @@
obj-$(CONFIG_NET_SCHED) += sch_api.o sch_fifo.o
obj-$(CONFIG_NET_CLS) += cls_api.o
-obj-$(CONFIG_NET_CLS_ACT) += act_api.o
+obj-$(CONFIG_NET_CLS_ACT) += act_api.o
obj-$(CONFIG_NET_ACT_POLICE) += police.o
obj-$(CONFIG_NET_CLS_POLICE) += police.o
-obj-$(CONFIG_NET_ACT_GACT) += gact.o
-obj-$(CONFIG_NET_ACT_MIRRED) += mirred.o
-obj-$(CONFIG_NET_ACT_IPT) += ipt.o
-obj-$(CONFIG_NET_ACT_PEDIT) += pedit.o
+obj-$(CONFIG_NET_ACT_GACT) += gact.o
+obj-$(CONFIG_NET_ACT_MIRRED) += mirred.o
+obj-$(CONFIG_NET_ACT_IPT) += ipt.o
+obj-$(CONFIG_NET_ACT_PEDIT) += pedit.o
+obj-$(CONFIG_NET_ACT_SIMP) += simple.o
obj-$(CONFIG_NET_SCH_CBQ) += sch_cbq.o
obj-$(CONFIG_NET_SCH_HTB) += sch_htb.o
obj-$(CONFIG_NET_SCH_HPFQ) += sch_hpfq.o
diff --git a/net/sched/simple.c b/net/sched/simple.c
new file mode 100644
index 0000000..b0d3d15
--- /dev/null
+++ b/net/sched/simple.c
@@ -0,0 +1,107 @@
+/*
+ * net/sched/simp.c Simple example of an action
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ *
+ * Authors: Jamal Hadi Salim (2005)
+ *
+ */
+
+#include <asm/uaccess.h>
+#include <asm/system.h>
+#include <asm/bitops.h>
+#include <linux/config.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/string.h>
+#include <linux/mm.h>
+#include <linux/socket.h>
+#include <linux/sockios.h>
+#include <linux/in.h>
+#include <linux/errno.h>
+#include <linux/interrupt.h>
+#include <linux/netdevice.h>
+#include <linux/skbuff.h>
+#include <linux/rtnetlink.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/proc_fs.h>
+#include <net/sock.h>
+#include <net/pkt_sched.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];
+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 int tcf_simp(struct sk_buff **pskb, struct tc_action *a)
+{
+ struct sk_buff *skb = *pskb;
+ struct tcf_defact *p = PRIV(a, defact);
+
+ spin_lock(&p->lock);
+ p->tm.lastuse = jiffies;
+ p->bstats.bytes += skb->len;
+ p->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;
+}
+
+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
+};
+
+MODULE_AUTHOR("Jamal Hadi Salim(2005)");
+MODULE_DESCRIPTION("Simple example action");
+MODULE_LICENSE("GPL");
+
+static int __init simp_init_module(void)
+{
+ int ret = tcf_register_action(&act_simp_ops);
+ if (!ret)
+ printk("Simple TC action Loaded\n");
+ return ret;
+}
+
+static void __exit simp_cleanup_module(void)
+{
+ tcf_unregister_action(&act_simp_ops);
+}
+
+module_init(simp_init_module);
+module_exit(simp_cleanup_module);
