Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * net/sched/mirred.c packet mirroring and redirect actions |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or |
| 5 | * modify it under the terms of the GNU General Public License |
| 6 | * as published by the Free Software Foundation; either version |
| 7 | * 2 of the License, or (at your option) any later version. |
| 8 | * |
| 9 | * Authors: Jamal Hadi Salim (2002-4) |
| 10 | * |
| 11 | * TODO: Add ingress support (and socket redirect support) |
| 12 | * |
| 13 | */ |
| 14 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 15 | #include <linux/types.h> |
| 16 | #include <linux/kernel.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | #include <linux/string.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | #include <linux/errno.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 19 | #include <linux/skbuff.h> |
| 20 | #include <linux/rtnetlink.h> |
| 21 | #include <linux/module.h> |
| 22 | #include <linux/init.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 23 | #include <linux/gfp.h> |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 24 | #include <net/net_namespace.h> |
Arnaldo Carvalho de Melo | dc5fc57 | 2007-03-25 23:06:12 -0700 | [diff] [blame] | 25 | #include <net/netlink.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | #include <net/pkt_sched.h> |
| 27 | #include <linux/tc_act/tc_mirred.h> |
| 28 | #include <net/tc_act/tc_mirred.h> |
| 29 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | #include <linux/if_arp.h> |
| 31 | |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 32 | #define MIRRED_TAB_MASK 7 |
stephen hemminger | 3b87956 | 2010-07-22 18:45:04 +0000 | [diff] [blame] | 33 | static LIST_HEAD(mirred_list); |
WANG Cong | 369ba56 | 2013-12-15 20:15:08 -0800 | [diff] [blame] | 34 | static struct tcf_hashinfo mirred_hash_info; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | |
WANG Cong | 8606203 | 2014-02-11 17:07:31 -0800 | [diff] [blame^] | 36 | static int tcf_mirred_release(struct tc_action *a, int bind) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | { |
WANG Cong | 8606203 | 2014-02-11 17:07:31 -0800 | [diff] [blame^] | 38 | struct tcf_mirred *m = to_mirred(a); |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 39 | if (m) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | if (bind) |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 41 | m->tcf_bindcnt--; |
| 42 | m->tcf_refcnt--; |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 43 | if (!m->tcf_bindcnt && m->tcf_refcnt <= 0) { |
stephen hemminger | 3b87956 | 2010-07-22 18:45:04 +0000 | [diff] [blame] | 44 | list_del(&m->tcfm_list); |
| 45 | if (m->tcfm_dev) |
| 46 | dev_put(m->tcfm_dev); |
WANG Cong | 8606203 | 2014-02-11 17:07:31 -0800 | [diff] [blame^] | 47 | tcf_hash_destroy(a); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | return 1; |
| 49 | } |
| 50 | } |
| 51 | return 0; |
| 52 | } |
| 53 | |
Patrick McHardy | 53b2bf3 | 2008-01-23 20:36:30 -0800 | [diff] [blame] | 54 | static const struct nla_policy mirred_policy[TCA_MIRRED_MAX + 1] = { |
| 55 | [TCA_MIRRED_PARMS] = { .len = sizeof(struct tc_mirred) }, |
| 56 | }; |
| 57 | |
Benjamin LaHaise | c1b5273 | 2013-01-14 05:15:39 +0000 | [diff] [blame] | 58 | static int tcf_mirred_init(struct net *net, struct nlattr *nla, |
| 59 | struct nlattr *est, struct tc_action *a, int ovr, |
| 60 | int bind) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 61 | { |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 62 | struct nlattr *tb[TCA_MIRRED_MAX + 1]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | struct tc_mirred *parm; |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 64 | struct tcf_mirred *m; |
Changli Gao | b76965e | 2009-11-17 04:15:16 -0800 | [diff] [blame] | 65 | struct net_device *dev; |
| 66 | int ret, ok_push = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 67 | |
Patrick McHardy | cee6372 | 2008-01-23 20:33:32 -0800 | [diff] [blame] | 68 | if (nla == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 69 | return -EINVAL; |
Changli Gao | b76965e | 2009-11-17 04:15:16 -0800 | [diff] [blame] | 70 | ret = nla_parse_nested(tb, TCA_MIRRED_MAX, nla, mirred_policy); |
| 71 | if (ret < 0) |
| 72 | return ret; |
Patrick McHardy | 53b2bf3 | 2008-01-23 20:36:30 -0800 | [diff] [blame] | 73 | if (tb[TCA_MIRRED_PARMS] == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 74 | return -EINVAL; |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 75 | parm = nla_data(tb[TCA_MIRRED_PARMS]); |
Changli Gao | b76965e | 2009-11-17 04:15:16 -0800 | [diff] [blame] | 76 | switch (parm->eaction) { |
| 77 | case TCA_EGRESS_MIRROR: |
| 78 | case TCA_EGRESS_REDIR: |
| 79 | break; |
| 80 | default: |
| 81 | return -EINVAL; |
| 82 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 83 | if (parm->ifindex) { |
Benjamin LaHaise | c1b5273 | 2013-01-14 05:15:39 +0000 | [diff] [blame] | 84 | dev = __dev_get_by_index(net, parm->ifindex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 85 | if (dev == NULL) |
| 86 | return -ENODEV; |
| 87 | switch (dev->type) { |
Changli Gao | b76965e | 2009-11-17 04:15:16 -0800 | [diff] [blame] | 88 | case ARPHRD_TUNNEL: |
| 89 | case ARPHRD_TUNNEL6: |
| 90 | case ARPHRD_SIT: |
| 91 | case ARPHRD_IPGRE: |
| 92 | case ARPHRD_VOID: |
| 93 | case ARPHRD_NONE: |
| 94 | ok_push = 0; |
| 95 | break; |
| 96 | default: |
| 97 | ok_push = 1; |
| 98 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 99 | } |
Changli Gao | b76965e | 2009-11-17 04:15:16 -0800 | [diff] [blame] | 100 | } else { |
| 101 | dev = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 102 | } |
| 103 | |
WANG Cong | 8606203 | 2014-02-11 17:07:31 -0800 | [diff] [blame^] | 104 | if (!tcf_hash_check(parm->index, a, bind)) { |
Changli Gao | b76965e | 2009-11-17 04:15:16 -0800 | [diff] [blame] | 105 | if (dev == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 106 | return -EINVAL; |
WANG Cong | 8606203 | 2014-02-11 17:07:31 -0800 | [diff] [blame^] | 107 | ret = tcf_hash_create(parm->index, est, a, sizeof(*m), bind); |
| 108 | if (ret) |
| 109 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 110 | ret = ACT_P_CREATED; |
| 111 | } else { |
| 112 | if (!ovr) { |
WANG Cong | 8606203 | 2014-02-11 17:07:31 -0800 | [diff] [blame^] | 113 | tcf_mirred_release(a, bind); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 114 | return -EEXIST; |
| 115 | } |
| 116 | } |
WANG Cong | 8606203 | 2014-02-11 17:07:31 -0800 | [diff] [blame^] | 117 | m = to_mirred(a); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 118 | |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 119 | spin_lock_bh(&m->tcf_lock); |
| 120 | m->tcf_action = parm->action; |
| 121 | m->tcfm_eaction = parm->eaction; |
Changli Gao | b76965e | 2009-11-17 04:15:16 -0800 | [diff] [blame] | 122 | if (dev != NULL) { |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 123 | m->tcfm_ifindex = parm->ifindex; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 124 | if (ret != ACT_P_CREATED) |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 125 | dev_put(m->tcfm_dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 126 | dev_hold(dev); |
Changli Gao | b76965e | 2009-11-17 04:15:16 -0800 | [diff] [blame] | 127 | m->tcfm_dev = dev; |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 128 | m->tcfm_ok_push = ok_push; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 129 | } |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 130 | spin_unlock_bh(&m->tcf_lock); |
stephen hemminger | 3b87956 | 2010-07-22 18:45:04 +0000 | [diff] [blame] | 131 | if (ret == ACT_P_CREATED) { |
| 132 | list_add(&m->tcfm_list, &mirred_list); |
WANG Cong | 8606203 | 2014-02-11 17:07:31 -0800 | [diff] [blame^] | 133 | tcf_hash_insert(a); |
stephen hemminger | 3b87956 | 2010-07-22 18:45:04 +0000 | [diff] [blame] | 134 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 135 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 136 | return ret; |
| 137 | } |
| 138 | |
Eric Dumazet | dc7f9f6 | 2011-07-05 23:25:42 +0000 | [diff] [blame] | 139 | static int tcf_mirred(struct sk_buff *skb, const struct tc_action *a, |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 140 | struct tcf_result *res) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 141 | { |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 142 | struct tcf_mirred *m = a->priv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 143 | struct net_device *dev; |
Changli Gao | feed1f1 | 2009-11-17 04:14:00 -0800 | [diff] [blame] | 144 | struct sk_buff *skb2; |
| 145 | u32 at; |
| 146 | int retval, err = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 147 | |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 148 | spin_lock(&m->tcf_lock); |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 149 | m->tcf_tm.lastuse = jiffies; |
Eric Dumazet | bfe0d02 | 2011-01-09 08:30:54 +0000 | [diff] [blame] | 150 | bstats_update(&m->tcf_bstats, skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 151 | |
Changli Gao | feed1f1 | 2009-11-17 04:14:00 -0800 | [diff] [blame] | 152 | dev = m->tcfm_dev; |
stephen hemminger | 3b87956 | 2010-07-22 18:45:04 +0000 | [diff] [blame] | 153 | if (!dev) { |
| 154 | printk_once(KERN_NOTICE "tc mirred: target device is gone\n"); |
| 155 | goto out; |
| 156 | } |
| 157 | |
Changli Gao | feed1f1 | 2009-11-17 04:14:00 -0800 | [diff] [blame] | 158 | if (!(dev->flags & IFF_UP)) { |
Joe Perches | e87cc47 | 2012-05-13 21:56:26 +0000 | [diff] [blame] | 159 | net_notice_ratelimited("tc mirred to Houston: device %s is down\n", |
| 160 | dev->name); |
Changli Gao | feed1f1 | 2009-11-17 04:14:00 -0800 | [diff] [blame] | 161 | goto out; |
| 162 | } |
| 163 | |
Changli Gao | 210d6de | 2010-06-24 16:25:12 +0000 | [diff] [blame] | 164 | at = G_TC_AT(skb->tc_verd); |
| 165 | skb2 = skb_act_clone(skb, GFP_ATOMIC, m->tcf_action); |
Changli Gao | feed1f1 | 2009-11-17 04:14:00 -0800 | [diff] [blame] | 166 | if (skb2 == NULL) |
| 167 | goto out; |
| 168 | |
Changli Gao | feed1f1 | 2009-11-17 04:14:00 -0800 | [diff] [blame] | 169 | if (!(at & AT_EGRESS)) { |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 170 | if (m->tcfm_ok_push) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 171 | skb_push(skb2, skb2->dev->hard_header_len); |
Changli Gao | feed1f1 | 2009-11-17 04:14:00 -0800 | [diff] [blame] | 172 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 173 | |
| 174 | /* mirror is always swallowed */ |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 175 | if (m->tcfm_eaction != TCA_EGRESS_MIRROR) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 176 | skb2->tc_verd = SET_TC_FROM(skb2->tc_verd, at); |
| 177 | |
Eric Dumazet | 8964be4 | 2009-11-20 15:35:04 -0800 | [diff] [blame] | 178 | skb2->skb_iif = skb->dev->ifindex; |
Changli Gao | 210d6de | 2010-06-24 16:25:12 +0000 | [diff] [blame] | 179 | skb2->dev = dev; |
Jamal Hadi Salim | 8919bc1 | 2011-08-15 05:25:40 +0000 | [diff] [blame] | 180 | err = dev_queue_xmit(skb2); |
Changli Gao | feed1f1 | 2009-11-17 04:14:00 -0800 | [diff] [blame] | 181 | |
| 182 | out: |
| 183 | if (err) { |
| 184 | m->tcf_qstats.overlimits++; |
Jason Wang | 16c0b16 | 2012-08-15 20:44:27 +0000 | [diff] [blame] | 185 | if (m->tcfm_eaction != TCA_EGRESS_MIRROR) |
| 186 | retval = TC_ACT_SHOT; |
| 187 | else |
| 188 | retval = m->tcf_action; |
| 189 | } else |
Changli Gao | feed1f1 | 2009-11-17 04:14:00 -0800 | [diff] [blame] | 190 | retval = m->tcf_action; |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 191 | spin_unlock(&m->tcf_lock); |
Changli Gao | feed1f1 | 2009-11-17 04:14:00 -0800 | [diff] [blame] | 192 | |
| 193 | return retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 194 | } |
| 195 | |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 196 | static int tcf_mirred_dump(struct sk_buff *skb, struct tc_action *a, int bind, int ref) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 197 | { |
Arnaldo Carvalho de Melo | 27a884d | 2007-04-19 20:29:13 -0700 | [diff] [blame] | 198 | unsigned char *b = skb_tail_pointer(skb); |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 199 | struct tcf_mirred *m = a->priv; |
Eric Dumazet | 1c40be1 | 2010-08-16 20:04:22 +0000 | [diff] [blame] | 200 | struct tc_mirred opt = { |
| 201 | .index = m->tcf_index, |
| 202 | .action = m->tcf_action, |
| 203 | .refcnt = m->tcf_refcnt - ref, |
| 204 | .bindcnt = m->tcf_bindcnt - bind, |
| 205 | .eaction = m->tcfm_eaction, |
| 206 | .ifindex = m->tcfm_ifindex, |
| 207 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 208 | struct tcf_t t; |
| 209 | |
David S. Miller | 1b34ec4 | 2012-03-29 05:11:39 -0400 | [diff] [blame] | 210 | if (nla_put(skb, TCA_MIRRED_PARMS, sizeof(opt), &opt)) |
| 211 | goto nla_put_failure; |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 212 | t.install = jiffies_to_clock_t(jiffies - m->tcf_tm.install); |
| 213 | t.lastuse = jiffies_to_clock_t(jiffies - m->tcf_tm.lastuse); |
| 214 | t.expires = jiffies_to_clock_t(m->tcf_tm.expires); |
David S. Miller | 1b34ec4 | 2012-03-29 05:11:39 -0400 | [diff] [blame] | 215 | if (nla_put(skb, TCA_MIRRED_TM, sizeof(t), &t)) |
| 216 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 217 | return skb->len; |
| 218 | |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 219 | nla_put_failure: |
Arnaldo Carvalho de Melo | dc5fc57 | 2007-03-25 23:06:12 -0700 | [diff] [blame] | 220 | nlmsg_trim(skb, b); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 221 | return -1; |
| 222 | } |
| 223 | |
stephen hemminger | 3b87956 | 2010-07-22 18:45:04 +0000 | [diff] [blame] | 224 | static int mirred_device_event(struct notifier_block *unused, |
| 225 | unsigned long event, void *ptr) |
| 226 | { |
Jiri Pirko | 351638e | 2013-05-28 01:30:21 +0000 | [diff] [blame] | 227 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
stephen hemminger | 3b87956 | 2010-07-22 18:45:04 +0000 | [diff] [blame] | 228 | struct tcf_mirred *m; |
| 229 | |
| 230 | if (event == NETDEV_UNREGISTER) |
| 231 | list_for_each_entry(m, &mirred_list, tcfm_list) { |
| 232 | if (m->tcfm_dev == dev) { |
| 233 | dev_put(dev); |
| 234 | m->tcfm_dev = NULL; |
| 235 | } |
| 236 | } |
| 237 | |
| 238 | return NOTIFY_DONE; |
| 239 | } |
| 240 | |
| 241 | static struct notifier_block mirred_device_notifier = { |
| 242 | .notifier_call = mirred_device_event, |
| 243 | }; |
| 244 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 245 | static struct tc_action_ops act_mirred_ops = { |
| 246 | .kind = "mirred", |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 247 | .hinfo = &mirred_hash_info, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 248 | .type = TCA_ACT_MIRRED, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 249 | .owner = THIS_MODULE, |
| 250 | .act = tcf_mirred, |
| 251 | .dump = tcf_mirred_dump, |
WANG Cong | 8606203 | 2014-02-11 17:07:31 -0800 | [diff] [blame^] | 252 | .cleanup = tcf_mirred_release, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 253 | .init = tcf_mirred_init, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 254 | }; |
| 255 | |
| 256 | MODULE_AUTHOR("Jamal Hadi Salim(2002)"); |
| 257 | MODULE_DESCRIPTION("Device Mirror/redirect actions"); |
| 258 | MODULE_LICENSE("GPL"); |
| 259 | |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 260 | static int __init mirred_init_module(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 261 | { |
stephen hemminger | 3b87956 | 2010-07-22 18:45:04 +0000 | [diff] [blame] | 262 | int err = register_netdevice_notifier(&mirred_device_notifier); |
| 263 | if (err) |
| 264 | return err; |
| 265 | |
WANG Cong | 568a153 | 2013-12-20 00:08:51 -0800 | [diff] [blame] | 266 | err = tcf_hashinfo_init(&mirred_hash_info, MIRRED_TAB_MASK); |
WANG Cong | 369ba56 | 2013-12-15 20:15:08 -0800 | [diff] [blame] | 267 | if (err) { |
| 268 | unregister_netdevice_notifier(&mirred_device_notifier); |
| 269 | return err; |
| 270 | } |
stephen hemminger | 6ff9c36 | 2010-05-12 06:37:05 +0000 | [diff] [blame] | 271 | pr_info("Mirror/redirect action on\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 272 | return tcf_register_action(&act_mirred_ops); |
| 273 | } |
| 274 | |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 275 | static void __exit mirred_cleanup_module(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 276 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 277 | tcf_unregister_action(&act_mirred_ops); |
WANG Cong | 568a153 | 2013-12-20 00:08:51 -0800 | [diff] [blame] | 278 | tcf_hashinfo_destroy(&mirred_hash_info); |
| 279 | unregister_netdevice_notifier(&mirred_device_notifier); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 280 | } |
| 281 | |
| 282 | module_init(mirred_init_module); |
| 283 | module_exit(mirred_cleanup_module); |