zte's code,first commit
Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/os/linux/linux-3.4.x/net/sched/act_mirred.c b/ap/os/linux/linux-3.4.x/net/sched/act_mirred.c
new file mode 100644
index 0000000..d067ed1
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/net/sched/act_mirred.c
@@ -0,0 +1,298 @@
+/*
+ * net/sched/mirred.c packet mirroring and redirect actions
+ *
+ * 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 (2002-4)
+ *
+ * TODO: Add ingress support (and socket redirect support)
+ *
+ */
+
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/errno.h>
+#include <linux/skbuff.h>
+#include <linux/rtnetlink.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/gfp.h>
+#include <net/net_namespace.h>
+#include <net/netlink.h>
+#include <net/pkt_sched.h>
+#include <linux/tc_act/tc_mirred.h>
+#include <net/tc_act/tc_mirred.h>
+
+#include <linux/if_arp.h>
+
+#define MIRRED_TAB_MASK 7
+static struct tcf_common *tcf_mirred_ht[MIRRED_TAB_MASK + 1];
+static u32 mirred_idx_gen;
+static DEFINE_RWLOCK(mirred_lock);
+static LIST_HEAD(mirred_list);
+
+static struct tcf_hashinfo mirred_hash_info = {
+ .htab = tcf_mirred_ht,
+ .hmask = MIRRED_TAB_MASK,
+ .lock = &mirred_lock,
+};
+
+static int tcf_mirred_release(struct tcf_mirred *m, int bind)
+{
+ if (m) {
+ if (bind)
+ m->tcf_bindcnt--;
+ m->tcf_refcnt--;
+ if (!m->tcf_bindcnt && m->tcf_refcnt <= 0) {
+ list_del(&m->tcfm_list);
+ if (m->tcfm_dev)
+ dev_put(m->tcfm_dev);
+ tcf_hash_destroy(&m->common, &mirred_hash_info);
+ return 1;
+ }
+ }
+ return 0;
+}
+
+static const struct nla_policy mirred_policy[TCA_MIRRED_MAX + 1] = {
+ [TCA_MIRRED_PARMS] = { .len = sizeof(struct tc_mirred) },
+};
+
+static int tcf_mirred_init(struct nlattr *nla, struct nlattr *est,
+ struct tc_action *a, int ovr, int bind)
+{
+ struct nlattr *tb[TCA_MIRRED_MAX + 1];
+ struct tc_mirred *parm;
+ struct tcf_mirred *m;
+ struct tcf_common *pc;
+ struct net_device *dev;
+ int ret, ok_push = 0;
+
+ if (nla == NULL)
+ return -EINVAL;
+ ret = nla_parse_nested(tb, TCA_MIRRED_MAX, nla, mirred_policy);
+ if (ret < 0)
+ return ret;
+ if (tb[TCA_MIRRED_PARMS] == NULL)
+ return -EINVAL;
+ parm = nla_data(tb[TCA_MIRRED_PARMS]);
+ switch (parm->eaction) {
+ case TCA_EGRESS_MIRROR:
+ case TCA_EGRESS_REDIR:
+ break;
+ default:
+ return -EINVAL;
+ }
+ if (parm->ifindex) {
+ dev = __dev_get_by_index(&init_net, parm->ifindex);
+ if (dev == NULL)
+ return -ENODEV;
+ switch (dev->type) {
+ case ARPHRD_TUNNEL:
+ case ARPHRD_TUNNEL6:
+ case ARPHRD_SIT:
+ case ARPHRD_IPGRE:
+ case ARPHRD_VOID:
+ case ARPHRD_NONE:
+ ok_push = 0;
+ break;
+ default:
+ ok_push = 1;
+ break;
+ }
+ } else {
+ dev = NULL;
+ }
+
+ pc = tcf_hash_check(parm->index, a, bind, &mirred_hash_info);
+ if (!pc) {
+ if (dev == NULL)
+ return -EINVAL;
+ pc = tcf_hash_create(parm->index, est, a, sizeof(*m), bind,
+ &mirred_idx_gen, &mirred_hash_info);
+ if (IS_ERR(pc))
+ return PTR_ERR(pc);
+ ret = ACT_P_CREATED;
+ } else {
+ if (!ovr) {
+ tcf_mirred_release(to_mirred(pc), bind);
+ return -EEXIST;
+ }
+ }
+ m = to_mirred(pc);
+
+ spin_lock_bh(&m->tcf_lock);
+ m->tcf_action = parm->action;
+ m->tcfm_eaction = parm->eaction;
+ if (dev != NULL) {
+ m->tcfm_ifindex = parm->ifindex;
+ if (ret != ACT_P_CREATED)
+ dev_put(m->tcfm_dev);
+ dev_hold(dev);
+ m->tcfm_dev = dev;
+ m->tcfm_ok_push = ok_push;
+ }
+ spin_unlock_bh(&m->tcf_lock);
+ if (ret == ACT_P_CREATED) {
+ list_add(&m->tcfm_list, &mirred_list);
+ tcf_hash_insert(pc, &mirred_hash_info);
+ }
+
+ return ret;
+}
+
+static int tcf_mirred_cleanup(struct tc_action *a, int bind)
+{
+ struct tcf_mirred *m = a->priv;
+
+ if (m)
+ return tcf_mirred_release(m, bind);
+ return 0;
+}
+
+static int tcf_mirred(struct sk_buff *skb, const struct tc_action *a,
+ struct tcf_result *res)
+{
+ struct tcf_mirred *m = a->priv;
+ struct net_device *dev;
+ struct sk_buff *skb2;
+ u32 at;
+ int retval, err = 1;
+
+ spin_lock(&m->tcf_lock);
+ m->tcf_tm.lastuse = jiffies;
+ bstats_update(&m->tcf_bstats, skb);
+
+ dev = m->tcfm_dev;
+ if (!dev) {
+ printk_once(KERN_NOTICE "tc mirred: target device is gone\n");
+ goto out;
+ }
+
+ if (!(dev->flags & IFF_UP)) {
+ if (net_ratelimit())
+ pr_notice("tc mirred to Houston: device %s is down\n",
+ dev->name);
+ goto out;
+ }
+
+ at = G_TC_AT(skb->tc_verd);
+ skb2 = skb_act_clone(skb, GFP_ATOMIC, m->tcf_action);
+ if (skb2 == NULL)
+ goto out;
+
+ if (!(at & AT_EGRESS)) {
+ if (m->tcfm_ok_push)
+ skb_push(skb2, skb2->dev->hard_header_len);
+ }
+
+ /* mirror is always swallowed */
+ if (m->tcfm_eaction != TCA_EGRESS_MIRROR)
+ skb2->tc_verd = SET_TC_FROM(skb2->tc_verd, at);
+
+ skb2->skb_iif = skb->dev->ifindex;
+ skb2->dev = dev;
+ err = dev_queue_xmit(skb2);
+
+out:
+ if (err) {
+ m->tcf_qstats.overlimits++;
+ if (m->tcfm_eaction != TCA_EGRESS_MIRROR)
+ retval = TC_ACT_SHOT;
+ else
+ retval = m->tcf_action;
+ } else
+ retval = m->tcf_action;
+ spin_unlock(&m->tcf_lock);
+
+ return retval;
+}
+
+static int tcf_mirred_dump(struct sk_buff *skb, struct tc_action *a, int bind, int ref)
+{
+ unsigned char *b = skb_tail_pointer(skb);
+ struct tcf_mirred *m = a->priv;
+ struct tc_mirred opt = {
+ .index = m->tcf_index,
+ .action = m->tcf_action,
+ .refcnt = m->tcf_refcnt - ref,
+ .bindcnt = m->tcf_bindcnt - bind,
+ .eaction = m->tcfm_eaction,
+ .ifindex = m->tcfm_ifindex,
+ };
+ struct tcf_t t;
+
+ NLA_PUT(skb, TCA_MIRRED_PARMS, sizeof(opt), &opt);
+ t.install = jiffies_to_clock_t(jiffies - m->tcf_tm.install);
+ t.lastuse = jiffies_to_clock_t(jiffies - m->tcf_tm.lastuse);
+ t.expires = jiffies_to_clock_t(m->tcf_tm.expires);
+ NLA_PUT(skb, TCA_MIRRED_TM, sizeof(t), &t);
+ return skb->len;
+
+nla_put_failure:
+ nlmsg_trim(skb, b);
+ return -1;
+}
+
+static int mirred_device_event(struct notifier_block *unused,
+ unsigned long event, void *ptr)
+{
+ struct net_device *dev = ptr;
+ struct tcf_mirred *m;
+
+ if (event == NETDEV_UNREGISTER)
+ list_for_each_entry(m, &mirred_list, tcfm_list) {
+ if (m->tcfm_dev == dev) {
+ dev_put(dev);
+ m->tcfm_dev = NULL;
+ }
+ }
+
+ return NOTIFY_DONE;
+}
+
+static struct notifier_block mirred_device_notifier = {
+ .notifier_call = mirred_device_event,
+};
+
+
+static struct tc_action_ops act_mirred_ops = {
+ .kind = "mirred",
+ .hinfo = &mirred_hash_info,
+ .type = TCA_ACT_MIRRED,
+ .capab = TCA_CAP_NONE,
+ .owner = THIS_MODULE,
+ .act = tcf_mirred,
+ .dump = tcf_mirred_dump,
+ .cleanup = tcf_mirred_cleanup,
+ .lookup = tcf_hash_search,
+ .init = tcf_mirred_init,
+ .walk = tcf_generic_walker
+};
+
+MODULE_AUTHOR("Jamal Hadi Salim(2002)");
+MODULE_DESCRIPTION("Device Mirror/redirect actions");
+MODULE_LICENSE("GPL");
+
+static int __init mirred_init_module(void)
+{
+ int err = register_netdevice_notifier(&mirred_device_notifier);
+ if (err)
+ return err;
+
+ pr_info("Mirror/redirect action on\n");
+ return tcf_register_action(&act_mirred_ops);
+}
+
+static void __exit mirred_cleanup_module(void)
+{
+ unregister_netdevice_notifier(&mirred_device_notifier);
+ tcf_unregister_action(&act_mirred_ops);
+}
+
+module_init(mirred_init_module);
+module_exit(mirred_cleanup_module);