*
*/
-#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 <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/etherdevice.h>
#include <linux/if_arp.h>
-
-/* use generic hash table */
-#define MY_TAB_SIZE 8
-#define MY_TAB_MASK (MY_TAB_SIZE - 1)
-static u32 idx_gen;
-static struct tcf_mirred *tcf_mirred_ht[MY_TAB_SIZE];
+#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);
-/* ovewrride the defaults */
-#define tcf_st tcf_mirred
-#define tc_st tc_mirred
-#define tcf_t_lock mirred_lock
-#define tcf_ht tcf_mirred_ht
-
-#define CONFIG_NET_ACT_INIT 1
-#include <net/pkt_act.h>
+static struct tcf_hashinfo mirred_hash_info = {
+ .htab = tcf_mirred_ht,
+ .hmask = MIRRED_TAB_MASK,
+ .lock = &mirred_lock,
+};
-static inline int
-tcf_mirred_release(struct tcf_mirred *p, int bind)
+static inline int tcf_mirred_release(struct tcf_mirred *m, int bind)
{
- if (p) {
+ if (m) {
if (bind)
- p->bindcnt--;
- p->refcnt--;
- if(!p->bindcnt && p->refcnt <= 0) {
- dev_put(p->dev);
- tcf_hash_destroy(p);
+ m->tcf_bindcnt--;
+ m->tcf_refcnt--;
+ if(!m->tcf_bindcnt && m->tcf_refcnt <= 0) {
+ dev_put(m->tcfm_dev);
+ tcf_hash_destroy(&m->common, &mirred_hash_info);
return 1;
}
}
return 0;
}
-static int
-tcf_mirred_init(struct rtattr *rta, struct rtattr *est, struct tc_action *a,
- int ovr, int bind)
+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 rtattr *tb[TCA_MIRRED_MAX];
+ struct nlattr *tb[TCA_MIRRED_MAX + 1];
struct tc_mirred *parm;
- struct tcf_mirred *p;
- struct net_device *dev = NULL;
- int ret = 0;
- int ok_push = 0;
+ struct tcf_mirred *m;
+ struct tcf_common *pc;
+ struct net_device *dev;
+ int ret, ok_push = 0;
- if (rta == NULL || rtattr_parse_nested(tb, TCA_MIRRED_MAX, rta) < 0)
+ if (nla == NULL)
return -EINVAL;
-
- if (tb[TCA_MIRRED_PARMS-1] == NULL ||
- RTA_PAYLOAD(tb[TCA_MIRRED_PARMS-1]) < sizeof(*parm))
+ 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 = RTA_DATA(tb[TCA_MIRRED_PARMS-1]);
-
+ 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(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;
+ 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;
}
- p = tcf_hash_check(parm->index, a, ovr, bind);
- if (p == NULL) {
- if (!parm->ifindex)
+ pc = tcf_hash_check(parm->index, a, bind, &mirred_hash_info);
+ if (!pc) {
+ if (dev == NULL)
return -EINVAL;
- p = tcf_hash_create(parm->index, est, a, sizeof(*p), ovr, bind);
- if (p == NULL)
- return -ENOMEM;
+ 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(p, bind);
+ tcf_mirred_release(to_mirred(pc), bind);
return -EEXIST;
}
}
+ m = to_mirred(pc);
- spin_lock_bh(&p->lock);
- p->action = parm->action;
- p->eaction = parm->eaction;
- if (parm->ifindex) {
- p->ifindex = parm->ifindex;
+ 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(p->dev);
- p->dev = dev;
+ dev_put(m->tcfm_dev);
dev_hold(dev);
- p->ok_push = ok_push;
+ m->tcfm_dev = dev;
+ m->tcfm_ok_push = ok_push;
}
- spin_unlock_bh(&p->lock);
+ spin_unlock_bh(&m->tcf_lock);
if (ret == ACT_P_CREATED)
- tcf_hash_insert(p);
+ tcf_hash_insert(pc, &mirred_hash_info);
- DPRINTK("tcf_mirred_init index %d action %d eaction %d device %s "
- "ifindex %d\n", parm->index, parm->action, parm->eaction,
- dev->name, parm->ifindex);
return ret;
}
-static int
-tcf_mirred_cleanup(struct tc_action *a, int bind)
+static int tcf_mirred_cleanup(struct tc_action *a, int bind)
{
- struct tcf_mirred *p = PRIV(a, mirred);
+ struct tcf_mirred *m = a->priv;
- if (p != NULL)
- return tcf_mirred_release(p, bind);
+ if (m)
+ return tcf_mirred_release(m, bind);
return 0;
}
-static int
-tcf_mirred(struct sk_buff *skb, struct tc_action *a, struct tcf_result *res)
+static int tcf_mirred(struct sk_buff *skb, struct tc_action *a,
+ struct tcf_result *res)
{
- struct tcf_mirred *p = PRIV(a, mirred);
+ struct tcf_mirred *m = a->priv;
struct net_device *dev;
- struct sk_buff *skb2 = NULL;
- u32 at = G_TC_AT(skb->tc_verd);
+ struct sk_buff *skb2;
+ u32 at;
+ int retval, err = 1;
- spin_lock(&p->lock);
+ spin_lock(&m->tcf_lock);
+ m->tcf_tm.lastuse = jiffies;
- dev = p->dev;
- p->tm.lastuse = jiffies;
-
- if (!(dev->flags&IFF_UP) ) {
+ dev = m->tcfm_dev;
+ if (!(dev->flags & IFF_UP)) {
if (net_ratelimit())
- printk("mirred to Houston: device %s is gone!\n",
- dev->name);
-bad_mirred:
- if (skb2 != NULL)
- kfree_skb(skb2);
- p->qstats.overlimits++;
- p->bstats.bytes += skb->len;
- p->bstats.packets++;
- spin_unlock(&p->lock);
- /* should we be asking for packet to be dropped?
- * may make sense for redirect case only
- */
- return TC_ACT_SHOT;
+ pr_notice("tc mirred to Houston: device %s is gone!\n",
+ dev->name);
+ goto out;
}
- skb2 = skb_clone(skb, GFP_ATOMIC);
+ skb2 = skb_act_clone(skb, GFP_ATOMIC);
if (skb2 == NULL)
- goto bad_mirred;
- if (p->eaction != TCA_EGRESS_MIRROR && p->eaction != TCA_EGRESS_REDIR) {
- if (net_ratelimit())
- printk("tcf_mirred unknown action %d\n", p->eaction);
- goto bad_mirred;
- }
+ goto out;
- p->bstats.bytes += skb2->len;
- p->bstats.packets++;
- if (!(at & AT_EGRESS))
- if (p->ok_push)
+ m->tcf_bstats.bytes += qdisc_pkt_len(skb2);
+ m->tcf_bstats.packets++;
+ at = G_TC_AT(skb->tc_verd);
+ if (!(at & AT_EGRESS)) {
+ if (m->tcfm_ok_push)
skb_push(skb2, skb2->dev->hard_header_len);
+ }
/* mirror is always swallowed */
- if (p->eaction != TCA_EGRESS_MIRROR)
+ if (m->tcfm_eaction != TCA_EGRESS_MIRROR)
skb2->tc_verd = SET_TC_FROM(skb2->tc_verd, at);
skb2->dev = dev;
- skb2->input_dev = skb->dev;
+ skb2->skb_iif = skb->dev->ifindex;
dev_queue_xmit(skb2);
- spin_unlock(&p->lock);
- return p->action;
+ err = 0;
+
+out:
+ if (err) {
+ m->tcf_qstats.overlimits++;
+ m->tcf_bstats.bytes += qdisc_pkt_len(skb);
+ m->tcf_bstats.packets++;
+ /* should we be asking for packet to be dropped?
+ * may make sense for redirect case only
+ */
+ retval = TC_ACT_SHOT;
+ } 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)
+static int tcf_mirred_dump(struct sk_buff *skb, struct tc_action *a, int bind, int ref)
{
- unsigned char *b = skb->tail;
+ unsigned char *b = skb_tail_pointer(skb);
+ struct tcf_mirred *m = a->priv;
struct tc_mirred opt;
- struct tcf_mirred *p = PRIV(a, mirred);
struct tcf_t t;
- opt.index = p->index;
- opt.action = p->action;
- opt.refcnt = p->refcnt - ref;
- opt.bindcnt = p->bindcnt - bind;
- opt.eaction = p->eaction;
- opt.ifindex = p->ifindex;
- DPRINTK("tcf_mirred_dump index %d action %d eaction %d ifindex %d\n",
- p->index, p->action, p->eaction, p->ifindex);
- RTA_PUT(skb, TCA_MIRRED_PARMS, sizeof(opt), &opt);
- 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_MIRRED_TM, sizeof(t), &t);
+ opt.index = m->tcf_index;
+ opt.action = m->tcf_action;
+ opt.refcnt = m->tcf_refcnt - ref;
+ opt.bindcnt = m->tcf_bindcnt - bind;
+ opt.eaction = m->tcfm_eaction;
+ opt.ifindex = m->tcfm_ifindex;
+ 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;
- rtattr_failure:
- skb_trim(skb, b - skb->data);
+nla_put_failure:
+ nlmsg_trim(skb, b);
return -1;
}
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,
MODULE_DESCRIPTION("Device Mirror/redirect actions");
MODULE_LICENSE("GPL");
-static int __init
-mirred_init_module(void)
+static int __init mirred_init_module(void)
{
- printk("Mirror/redirect action on\n");
+ pr_info("Mirror/redirect action on\n");
return tcf_register_action(&act_mirred_ops);
}
-static void __exit
-mirred_cleanup_module(void)
+static void __exit mirred_cleanup_module(void)
{
tcf_unregister_action(&act_mirred_ops);
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff