From 4bba3925924148c24fb0c7636a04ad69a6a56b84 Mon Sep 17 00:00:00 2001 From: Patrick McHardy Date: Sun, 8 Jan 2006 22:22:14 -0800 Subject: [PKT_SCHED]: Prefix tc actions with act_ Clean up the net/sched directory a bit by prefix all actions with act_. Signed-off-by: Patrick McHardy Signed-off-by: David S. Miller --- net/sched/act_mirred.c | 275 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 275 insertions(+) create mode 100644 net/sched/act_mirred.c (limited to 'net/sched/act_mirred.c') diff --git a/net/sched/act_mirred.c b/net/sched/act_mirred.c new file mode 100644 index 0000000..4fcccbd --- /dev/null +++ b/net/sched/act_mirred.c @@ -0,0 +1,275 @@ +/* + * 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 +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include + + +/* 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]; +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 + +static inline int +tcf_mirred_release(struct tcf_mirred *p, int bind) +{ + if (p) { + if (bind) + p->bindcnt--; + p->refcnt--; + if(!p->bindcnt && p->refcnt <= 0) { + dev_put(p->dev); + tcf_hash_destroy(p); + return 1; + } + } + return 0; +} + +static int +tcf_mirred_init(struct rtattr *rta, struct rtattr *est, struct tc_action *a, + int ovr, int bind) +{ + struct rtattr *tb[TCA_MIRRED_MAX]; + struct tc_mirred *parm; + struct tcf_mirred *p; + struct net_device *dev = NULL; + int ret = 0; + int ok_push = 0; + + if (rta == NULL || rtattr_parse_nested(tb, TCA_MIRRED_MAX, rta) < 0) + return -EINVAL; + + if (tb[TCA_MIRRED_PARMS-1] == NULL || + RTA_PAYLOAD(tb[TCA_MIRRED_PARMS-1]) < sizeof(*parm)) + return -EINVAL; + parm = RTA_DATA(tb[TCA_MIRRED_PARMS-1]); + + if (parm->ifindex) { + dev = __dev_get_by_index(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; + } + } + + p = tcf_hash_check(parm->index, a, ovr, bind); + if (p == NULL) { + if (!parm->ifindex) + return -EINVAL; + p = tcf_hash_create(parm->index, est, a, sizeof(*p), ovr, bind); + if (p == NULL) + return -ENOMEM; + ret = ACT_P_CREATED; + } else { + if (!ovr) { + tcf_mirred_release(p, bind); + return -EEXIST; + } + } + + spin_lock_bh(&p->lock); + p->action = parm->action; + p->eaction = parm->eaction; + if (parm->ifindex) { + p->ifindex = parm->ifindex; + if (ret != ACT_P_CREATED) + dev_put(p->dev); + p->dev = dev; + dev_hold(dev); + p->ok_push = ok_push; + } + spin_unlock_bh(&p->lock); + if (ret == ACT_P_CREATED) + tcf_hash_insert(p); + + 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) +{ + struct tcf_mirred *p = PRIV(a, mirred); + + if (p != NULL) + return tcf_mirred_release(p, bind); + return 0; +} + +static int +tcf_mirred(struct sk_buff *skb, struct tc_action *a, struct tcf_result *res) +{ + struct tcf_mirred *p = PRIV(a, mirred); + struct net_device *dev; + struct sk_buff *skb2 = NULL; + u32 at = G_TC_AT(skb->tc_verd); + + spin_lock(&p->lock); + + dev = p->dev; + p->tm.lastuse = jiffies; + + 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; + } + + skb2 = skb_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; + } + + p->bstats.bytes += skb2->len; + p->bstats.packets++; + if (!(at & AT_EGRESS)) + if (p->ok_push) + skb_push(skb2, skb2->dev->hard_header_len); + + /* mirror is always swallowed */ + if (p->eaction != TCA_EGRESS_MIRROR) + skb2->tc_verd = SET_TC_FROM(skb2->tc_verd, at); + + skb2->dev = dev; + skb2->input_dev = skb->dev; + dev_queue_xmit(skb2); + spin_unlock(&p->lock); + return p->action; +} + +static int +tcf_mirred_dump(struct sk_buff *skb, struct tc_action *a, int bind, int ref) +{ + unsigned char *b = skb->tail; + 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); + return skb->len; + + rtattr_failure: + skb_trim(skb, b - skb->data); + return -1; +} + +static struct tc_action_ops act_mirred_ops = { + .kind = "mirred", + .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) +{ + printk("Mirror/redirect action on\n"); + return tcf_register_action(&act_mirred_ops); +} + +static void __exit +mirred_cleanup_module(void) +{ + tcf_unregister_action(&act_mirred_ops); +} + +module_init(mirred_init_module); +module_exit(mirred_cleanup_module); -- cgit v1.1