Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * net/sched/act_api.c Packet action API. |
| 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 | * Author: Jamal Hadi Salim |
| 10 | * |
| 11 | * |
| 12 | */ |
| 13 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 14 | #include <linux/types.h> |
| 15 | #include <linux/kernel.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 16 | #include <linux/string.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | #include <linux/errno.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 18 | #include <linux/slab.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 19 | #include <linux/skbuff.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 20 | #include <linux/init.h> |
| 21 | #include <linux/kmod.h> |
Patrick McHardy | ab27cfb | 2008-01-23 20:33:13 -0800 | [diff] [blame] | 22 | #include <linux/err.h> |
Paul Gortmaker | 3a9a231 | 2011-05-27 09:12:25 -0400 | [diff] [blame] | 23 | #include <linux/module.h> |
Denis V. Lunev | b854272 | 2007-12-01 00:21:31 +1100 | [diff] [blame] | 24 | #include <net/net_namespace.h> |
| 25 | #include <net/sock.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | #include <net/sch_generic.h> |
| 27 | #include <net/act_api.h> |
Arnaldo Carvalho de Melo | dc5fc57 | 2007-03-25 23:06:12 -0700 | [diff] [blame] | 28 | #include <net/netlink.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 29 | |
Eric Dumazet | 519c818 | 2015-07-06 05:18:04 -0700 | [diff] [blame] | 30 | static void free_tcf(struct rcu_head *head) |
| 31 | { |
| 32 | struct tcf_common *p = container_of(head, struct tcf_common, tcfc_rcu); |
| 33 | |
| 34 | free_percpu(p->cpu_bstats); |
| 35 | free_percpu(p->cpu_qstats); |
| 36 | kfree(p); |
| 37 | } |
| 38 | |
WANG Cong | ddf97cc | 2016-02-22 15:57:53 -0800 | [diff] [blame] | 39 | static void tcf_hash_destroy(struct tcf_hashinfo *hinfo, struct tc_action *a) |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 40 | { |
WANG Cong | 8606203 | 2014-02-11 17:07:31 -0800 | [diff] [blame] | 41 | struct tcf_common *p = a->priv; |
WANG Cong | 8606203 | 2014-02-11 17:07:31 -0800 | [diff] [blame] | 42 | |
WANG Cong | 89819dc | 2013-12-15 20:15:09 -0800 | [diff] [blame] | 43 | spin_lock_bh(&hinfo->lock); |
| 44 | hlist_del(&p->tcfc_head); |
| 45 | spin_unlock_bh(&hinfo->lock); |
| 46 | gen_kill_estimator(&p->tcfc_bstats, |
| 47 | &p->tcfc_rate_est); |
| 48 | /* |
| 49 | * gen_estimator est_timer() might access p->tcfc_lock |
| 50 | * or bstats, wait a RCU grace period before freeing p |
| 51 | */ |
Eric Dumazet | 519c818 | 2015-07-06 05:18:04 -0700 | [diff] [blame] | 52 | call_rcu(&p->tcfc_rcu, free_tcf); |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 53 | } |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 54 | |
Daniel Borkmann | 28e6b67 | 2015-07-29 23:35:25 +0200 | [diff] [blame] | 55 | int __tcf_hash_release(struct tc_action *a, bool bind, bool strict) |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 56 | { |
WANG Cong | 8606203 | 2014-02-11 17:07:31 -0800 | [diff] [blame] | 57 | struct tcf_common *p = a->priv; |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 58 | int ret = 0; |
| 59 | |
| 60 | if (p) { |
| 61 | if (bind) |
| 62 | p->tcfc_bindcnt--; |
Daniel Borkmann | 28e6b67 | 2015-07-29 23:35:25 +0200 | [diff] [blame] | 63 | else if (strict && p->tcfc_bindcnt > 0) |
WANG Cong | 55334a5 | 2014-02-11 17:07:34 -0800 | [diff] [blame] | 64 | return -EPERM; |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 65 | |
| 66 | p->tcfc_refcnt--; |
YOSHIFUJI Hideaki | 10297b9 | 2007-02-09 23:25:16 +0900 | [diff] [blame] | 67 | if (p->tcfc_bindcnt <= 0 && p->tcfc_refcnt <= 0) { |
WANG Cong | a5b5c95 | 2014-02-11 17:07:32 -0800 | [diff] [blame] | 68 | if (a->ops->cleanup) |
| 69 | a->ops->cleanup(a, bind); |
WANG Cong | ddf97cc | 2016-02-22 15:57:53 -0800 | [diff] [blame] | 70 | tcf_hash_destroy(a->hinfo, a); |
WANG Cong | 1d4150c | 2016-02-22 15:57:52 -0800 | [diff] [blame] | 71 | ret = ACT_P_DELETED; |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 72 | } |
| 73 | } |
Daniel Borkmann | 28e6b67 | 2015-07-29 23:35:25 +0200 | [diff] [blame] | 74 | |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 75 | return ret; |
| 76 | } |
Daniel Borkmann | 28e6b67 | 2015-07-29 23:35:25 +0200 | [diff] [blame] | 77 | EXPORT_SYMBOL(__tcf_hash_release); |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 78 | |
WANG Cong | ddf97cc | 2016-02-22 15:57:53 -0800 | [diff] [blame] | 79 | static int tcf_dump_walker(struct tcf_hashinfo *hinfo, struct sk_buff *skb, |
| 80 | struct netlink_callback *cb, struct tc_action *a) |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 81 | { |
WANG Cong | 89819dc | 2013-12-15 20:15:09 -0800 | [diff] [blame] | 82 | struct hlist_head *head; |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 83 | struct tcf_common *p; |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 84 | int err = 0, index = -1, i = 0, s_i = 0, n_i = 0; |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 85 | struct nlattr *nest; |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 86 | |
WANG Cong | 89819dc | 2013-12-15 20:15:09 -0800 | [diff] [blame] | 87 | spin_lock_bh(&hinfo->lock); |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 88 | |
| 89 | s_i = cb->args[0]; |
| 90 | |
| 91 | for (i = 0; i < (hinfo->hmask + 1); i++) { |
WANG Cong | 89819dc | 2013-12-15 20:15:09 -0800 | [diff] [blame] | 92 | head = &hinfo->htab[tcf_hash(i, hinfo->hmask)]; |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 93 | |
WANG Cong | 89819dc | 2013-12-15 20:15:09 -0800 | [diff] [blame] | 94 | hlist_for_each_entry_rcu(p, head, tcfc_head) { |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 95 | index++; |
| 96 | if (index < s_i) |
| 97 | continue; |
| 98 | a->priv = p; |
| 99 | a->order = n_i; |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 100 | |
| 101 | nest = nla_nest_start(skb, a->order); |
| 102 | if (nest == NULL) |
| 103 | goto nla_put_failure; |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 104 | err = tcf_action_dump_1(skb, a, 0, 0); |
| 105 | if (err < 0) { |
| 106 | index--; |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 107 | nlmsg_trim(skb, nest); |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 108 | goto done; |
| 109 | } |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 110 | nla_nest_end(skb, nest); |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 111 | n_i++; |
| 112 | if (n_i >= TCA_ACT_MAX_PRIO) |
| 113 | goto done; |
| 114 | } |
| 115 | } |
| 116 | done: |
WANG Cong | 89819dc | 2013-12-15 20:15:09 -0800 | [diff] [blame] | 117 | spin_unlock_bh(&hinfo->lock); |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 118 | if (n_i) |
| 119 | cb->args[0] += n_i; |
| 120 | return n_i; |
| 121 | |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 122 | nla_put_failure: |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 123 | nla_nest_cancel(skb, nest); |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 124 | goto done; |
| 125 | } |
| 126 | |
WANG Cong | ddf97cc | 2016-02-22 15:57:53 -0800 | [diff] [blame] | 127 | static int tcf_del_walker(struct tcf_hashinfo *hinfo, struct sk_buff *skb, |
| 128 | struct tc_action *a) |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 129 | { |
WANG Cong | 89819dc | 2013-12-15 20:15:09 -0800 | [diff] [blame] | 130 | struct hlist_head *head; |
| 131 | struct hlist_node *n; |
| 132 | struct tcf_common *p; |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 133 | struct nlattr *nest; |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 134 | int i = 0, n_i = 0; |
WANG Cong | 55334a5 | 2014-02-11 17:07:34 -0800 | [diff] [blame] | 135 | int ret = -EINVAL; |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 136 | |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 137 | nest = nla_nest_start(skb, a->order); |
| 138 | if (nest == NULL) |
| 139 | goto nla_put_failure; |
David S. Miller | 1b34ec4 | 2012-03-29 05:11:39 -0400 | [diff] [blame] | 140 | if (nla_put_string(skb, TCA_KIND, a->ops->kind)) |
| 141 | goto nla_put_failure; |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 142 | for (i = 0; i < (hinfo->hmask + 1); i++) { |
WANG Cong | 89819dc | 2013-12-15 20:15:09 -0800 | [diff] [blame] | 143 | head = &hinfo->htab[tcf_hash(i, hinfo->hmask)]; |
| 144 | hlist_for_each_entry_safe(p, n, head, tcfc_head) { |
WANG Cong | 8606203 | 2014-02-11 17:07:31 -0800 | [diff] [blame] | 145 | a->priv = p; |
Daniel Borkmann | 28e6b67 | 2015-07-29 23:35:25 +0200 | [diff] [blame] | 146 | ret = __tcf_hash_release(a, false, true); |
WANG Cong | 55334a5 | 2014-02-11 17:07:34 -0800 | [diff] [blame] | 147 | if (ret == ACT_P_DELETED) { |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 148 | module_put(a->ops->owner); |
Jamal Hadi Salim | 805c1f4 | 2013-12-23 08:02:13 -0500 | [diff] [blame] | 149 | n_i++; |
WANG Cong | 55334a5 | 2014-02-11 17:07:34 -0800 | [diff] [blame] | 150 | } else if (ret < 0) |
| 151 | goto nla_put_failure; |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 152 | } |
| 153 | } |
David S. Miller | 1b34ec4 | 2012-03-29 05:11:39 -0400 | [diff] [blame] | 154 | if (nla_put_u32(skb, TCA_FCNT, n_i)) |
| 155 | goto nla_put_failure; |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 156 | nla_nest_end(skb, nest); |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 157 | |
| 158 | return n_i; |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 159 | nla_put_failure: |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 160 | nla_nest_cancel(skb, nest); |
WANG Cong | 55334a5 | 2014-02-11 17:07:34 -0800 | [diff] [blame] | 161 | return ret; |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 162 | } |
| 163 | |
WANG Cong | ddf97cc | 2016-02-22 15:57:53 -0800 | [diff] [blame] | 164 | int tcf_generic_walker(struct tc_action_net *tn, struct sk_buff *skb, |
| 165 | struct netlink_callback *cb, int type, |
| 166 | struct tc_action *a) |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 167 | { |
WANG Cong | ddf97cc | 2016-02-22 15:57:53 -0800 | [diff] [blame] | 168 | struct tcf_hashinfo *hinfo = tn->hinfo; |
| 169 | |
| 170 | a->hinfo = hinfo; |
| 171 | |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 172 | if (type == RTM_DELACTION) { |
WANG Cong | ddf97cc | 2016-02-22 15:57:53 -0800 | [diff] [blame] | 173 | return tcf_del_walker(hinfo, skb, a); |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 174 | } else if (type == RTM_GETACTION) { |
WANG Cong | ddf97cc | 2016-02-22 15:57:53 -0800 | [diff] [blame] | 175 | return tcf_dump_walker(hinfo, skb, cb, a); |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 176 | } else { |
stephen hemminger | 6ff9c36 | 2010-05-12 06:37:05 +0000 | [diff] [blame] | 177 | WARN(1, "tcf_generic_walker: unknown action %d\n", type); |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 178 | return -EINVAL; |
| 179 | } |
| 180 | } |
WANG Cong | ddf97cc | 2016-02-22 15:57:53 -0800 | [diff] [blame] | 181 | EXPORT_SYMBOL(tcf_generic_walker); |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 182 | |
WANG Cong | 6e6a50c | 2014-01-17 11:37:03 -0800 | [diff] [blame] | 183 | static struct tcf_common *tcf_hash_lookup(u32 index, struct tcf_hashinfo *hinfo) |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 184 | { |
WANG Cong | 89819dc | 2013-12-15 20:15:09 -0800 | [diff] [blame] | 185 | struct tcf_common *p = NULL; |
| 186 | struct hlist_head *head; |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 187 | |
WANG Cong | 89819dc | 2013-12-15 20:15:09 -0800 | [diff] [blame] | 188 | spin_lock_bh(&hinfo->lock); |
| 189 | head = &hinfo->htab[tcf_hash(index, hinfo->hmask)]; |
| 190 | hlist_for_each_entry_rcu(p, head, tcfc_head) |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 191 | if (p->tcfc_index == index) |
| 192 | break; |
WANG Cong | 89819dc | 2013-12-15 20:15:09 -0800 | [diff] [blame] | 193 | spin_unlock_bh(&hinfo->lock); |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 194 | |
| 195 | return p; |
| 196 | } |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 197 | |
WANG Cong | ddf97cc | 2016-02-22 15:57:53 -0800 | [diff] [blame] | 198 | u32 tcf_hash_new_index(struct tc_action_net *tn) |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 199 | { |
WANG Cong | ddf97cc | 2016-02-22 15:57:53 -0800 | [diff] [blame] | 200 | struct tcf_hashinfo *hinfo = tn->hinfo; |
WANG Cong | ddafd34 | 2014-01-09 16:13:59 -0800 | [diff] [blame] | 201 | u32 val = hinfo->index; |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 202 | |
| 203 | do { |
| 204 | if (++val == 0) |
| 205 | val = 1; |
| 206 | } while (tcf_hash_lookup(val, hinfo)); |
| 207 | |
WANG Cong | ddafd34 | 2014-01-09 16:13:59 -0800 | [diff] [blame] | 208 | hinfo->index = val; |
Yang Yingliang | 17569fa | 2013-12-10 20:55:29 +0800 | [diff] [blame] | 209 | return val; |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 210 | } |
| 211 | EXPORT_SYMBOL(tcf_hash_new_index); |
| 212 | |
WANG Cong | ddf97cc | 2016-02-22 15:57:53 -0800 | [diff] [blame] | 213 | int tcf_hash_search(struct tc_action_net *tn, struct tc_action *a, u32 index) |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 214 | { |
WANG Cong | ddf97cc | 2016-02-22 15:57:53 -0800 | [diff] [blame] | 215 | struct tcf_hashinfo *hinfo = tn->hinfo; |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 216 | struct tcf_common *p = tcf_hash_lookup(index, hinfo); |
| 217 | |
| 218 | if (p) { |
| 219 | a->priv = p; |
WANG Cong | ddf97cc | 2016-02-22 15:57:53 -0800 | [diff] [blame] | 220 | a->hinfo = hinfo; |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 221 | return 1; |
| 222 | } |
| 223 | return 0; |
| 224 | } |
WANG Cong | 6e6a50c | 2014-01-17 11:37:03 -0800 | [diff] [blame] | 225 | EXPORT_SYMBOL(tcf_hash_search); |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 226 | |
WANG Cong | b231307 | 2016-06-13 13:46:28 -0700 | [diff] [blame^] | 227 | bool tcf_hash_check(struct tc_action_net *tn, u32 index, struct tc_action *a, |
| 228 | int bind) |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 229 | { |
WANG Cong | ddf97cc | 2016-02-22 15:57:53 -0800 | [diff] [blame] | 230 | struct tcf_hashinfo *hinfo = tn->hinfo; |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 231 | struct tcf_common *p = NULL; |
| 232 | if (index && (p = tcf_hash_lookup(index, hinfo)) != NULL) { |
Jamal Hadi Salim | 76aab2c | 2008-08-07 20:37:22 -0700 | [diff] [blame] | 233 | if (bind) |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 234 | p->tcfc_bindcnt++; |
Jamal Hadi Salim | 76aab2c | 2008-08-07 20:37:22 -0700 | [diff] [blame] | 235 | p->tcfc_refcnt++; |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 236 | a->priv = p; |
WANG Cong | ddf97cc | 2016-02-22 15:57:53 -0800 | [diff] [blame] | 237 | a->hinfo = hinfo; |
WANG Cong | b231307 | 2016-06-13 13:46:28 -0700 | [diff] [blame^] | 238 | return true; |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 239 | } |
WANG Cong | b231307 | 2016-06-13 13:46:28 -0700 | [diff] [blame^] | 240 | return false; |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 241 | } |
| 242 | EXPORT_SYMBOL(tcf_hash_check); |
| 243 | |
WANG Cong | 8606203 | 2014-02-11 17:07:31 -0800 | [diff] [blame] | 244 | void tcf_hash_cleanup(struct tc_action *a, struct nlattr *est) |
| 245 | { |
| 246 | struct tcf_common *pc = a->priv; |
| 247 | if (est) |
| 248 | gen_kill_estimator(&pc->tcfc_bstats, |
| 249 | &pc->tcfc_rate_est); |
Eric Dumazet | 519c818 | 2015-07-06 05:18:04 -0700 | [diff] [blame] | 250 | call_rcu(&pc->tcfc_rcu, free_tcf); |
WANG Cong | 8606203 | 2014-02-11 17:07:31 -0800 | [diff] [blame] | 251 | } |
| 252 | EXPORT_SYMBOL(tcf_hash_cleanup); |
| 253 | |
WANG Cong | ddf97cc | 2016-02-22 15:57:53 -0800 | [diff] [blame] | 254 | int tcf_hash_create(struct tc_action_net *tn, u32 index, struct nlattr *est, |
| 255 | struct tc_action *a, int size, int bind, bool cpustats) |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 256 | { |
| 257 | struct tcf_common *p = kzalloc(size, GFP_KERNEL); |
WANG Cong | ddf97cc | 2016-02-22 15:57:53 -0800 | [diff] [blame] | 258 | struct tcf_hashinfo *hinfo = tn->hinfo; |
Eric Dumazet | 519c818 | 2015-07-06 05:18:04 -0700 | [diff] [blame] | 259 | int err = -ENOMEM; |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 260 | |
| 261 | if (unlikely(!p)) |
WANG Cong | 8606203 | 2014-02-11 17:07:31 -0800 | [diff] [blame] | 262 | return -ENOMEM; |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 263 | p->tcfc_refcnt = 1; |
| 264 | if (bind) |
| 265 | p->tcfc_bindcnt = 1; |
| 266 | |
Eric Dumazet | 519c818 | 2015-07-06 05:18:04 -0700 | [diff] [blame] | 267 | if (cpustats) { |
| 268 | p->cpu_bstats = netdev_alloc_pcpu_stats(struct gnet_stats_basic_cpu); |
| 269 | if (!p->cpu_bstats) { |
| 270 | err1: |
| 271 | kfree(p); |
| 272 | return err; |
| 273 | } |
| 274 | p->cpu_qstats = alloc_percpu(struct gnet_stats_queue); |
| 275 | if (!p->cpu_qstats) { |
| 276 | err2: |
| 277 | free_percpu(p->cpu_bstats); |
| 278 | goto err1; |
| 279 | } |
| 280 | } |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 281 | spin_lock_init(&p->tcfc_lock); |
WANG Cong | 89819dc | 2013-12-15 20:15:09 -0800 | [diff] [blame] | 282 | INIT_HLIST_NODE(&p->tcfc_head); |
WANG Cong | ddf97cc | 2016-02-22 15:57:53 -0800 | [diff] [blame] | 283 | p->tcfc_index = index ? index : tcf_hash_new_index(tn); |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 284 | p->tcfc_tm.install = jiffies; |
| 285 | p->tcfc_tm.lastuse = jiffies; |
Jamal Hadi Salim | 53eb440 | 2016-06-06 06:32:54 -0400 | [diff] [blame] | 286 | p->tcfc_tm.firstuse = 0; |
Stephen Hemminger | 0e991ec | 2008-11-25 21:12:32 -0800 | [diff] [blame] | 287 | if (est) { |
Eric Dumazet | 519c818 | 2015-07-06 05:18:04 -0700 | [diff] [blame] | 288 | err = gen_new_estimator(&p->tcfc_bstats, p->cpu_bstats, |
| 289 | &p->tcfc_rate_est, |
Eric Dumazet | edb09eb | 2016-06-06 09:37:16 -0700 | [diff] [blame] | 290 | &p->tcfc_lock, NULL, est); |
Stephen Hemminger | 0e991ec | 2008-11-25 21:12:32 -0800 | [diff] [blame] | 291 | if (err) { |
Eric Dumazet | 519c818 | 2015-07-06 05:18:04 -0700 | [diff] [blame] | 292 | free_percpu(p->cpu_qstats); |
| 293 | goto err2; |
Stephen Hemminger | 0e991ec | 2008-11-25 21:12:32 -0800 | [diff] [blame] | 294 | } |
| 295 | } |
| 296 | |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 297 | a->priv = (void *) p; |
WANG Cong | ddf97cc | 2016-02-22 15:57:53 -0800 | [diff] [blame] | 298 | a->hinfo = hinfo; |
WANG Cong | 8606203 | 2014-02-11 17:07:31 -0800 | [diff] [blame] | 299 | return 0; |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 300 | } |
| 301 | EXPORT_SYMBOL(tcf_hash_create); |
| 302 | |
WANG Cong | ddf97cc | 2016-02-22 15:57:53 -0800 | [diff] [blame] | 303 | void tcf_hash_insert(struct tc_action_net *tn, struct tc_action *a) |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 304 | { |
WANG Cong | 8606203 | 2014-02-11 17:07:31 -0800 | [diff] [blame] | 305 | struct tcf_common *p = a->priv; |
WANG Cong | ddf97cc | 2016-02-22 15:57:53 -0800 | [diff] [blame] | 306 | struct tcf_hashinfo *hinfo = tn->hinfo; |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 307 | unsigned int h = tcf_hash(p->tcfc_index, hinfo->hmask); |
| 308 | |
WANG Cong | 89819dc | 2013-12-15 20:15:09 -0800 | [diff] [blame] | 309 | spin_lock_bh(&hinfo->lock); |
| 310 | hlist_add_head(&p->tcfc_head, &hinfo->htab[h]); |
| 311 | spin_unlock_bh(&hinfo->lock); |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 312 | } |
| 313 | EXPORT_SYMBOL(tcf_hash_insert); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 314 | |
WANG Cong | ddf97cc | 2016-02-22 15:57:53 -0800 | [diff] [blame] | 315 | void tcf_hashinfo_destroy(const struct tc_action_ops *ops, |
| 316 | struct tcf_hashinfo *hinfo) |
WANG Cong | 1d4150c | 2016-02-22 15:57:52 -0800 | [diff] [blame] | 317 | { |
WANG Cong | 1d4150c | 2016-02-22 15:57:52 -0800 | [diff] [blame] | 318 | struct tc_action a = { |
| 319 | .ops = ops, |
WANG Cong | ddf97cc | 2016-02-22 15:57:53 -0800 | [diff] [blame] | 320 | .hinfo = hinfo, |
WANG Cong | 1d4150c | 2016-02-22 15:57:52 -0800 | [diff] [blame] | 321 | }; |
| 322 | int i; |
| 323 | |
| 324 | for (i = 0; i < hinfo->hmask + 1; i++) { |
| 325 | struct tcf_common *p; |
| 326 | struct hlist_node *n; |
| 327 | |
| 328 | hlist_for_each_entry_safe(p, n, &hinfo->htab[i], tcfc_head) { |
| 329 | int ret; |
| 330 | |
| 331 | a.priv = p; |
| 332 | ret = __tcf_hash_release(&a, false, true); |
| 333 | if (ret == ACT_P_DELETED) |
| 334 | module_put(ops->owner); |
| 335 | else if (ret < 0) |
| 336 | return; |
| 337 | } |
| 338 | } |
| 339 | kfree(hinfo->htab); |
| 340 | } |
WANG Cong | ddf97cc | 2016-02-22 15:57:53 -0800 | [diff] [blame] | 341 | EXPORT_SYMBOL(tcf_hashinfo_destroy); |
WANG Cong | 1d4150c | 2016-02-22 15:57:52 -0800 | [diff] [blame] | 342 | |
WANG Cong | 1f747c2 | 2013-12-15 20:15:10 -0800 | [diff] [blame] | 343 | static LIST_HEAD(act_base); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 344 | static DEFINE_RWLOCK(act_mod_lock); |
| 345 | |
WANG Cong | ddf97cc | 2016-02-22 15:57:53 -0800 | [diff] [blame] | 346 | int tcf_register_action(struct tc_action_ops *act, |
| 347 | struct pernet_operations *ops) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 348 | { |
WANG Cong | 1f747c2 | 2013-12-15 20:15:10 -0800 | [diff] [blame] | 349 | struct tc_action_ops *a; |
WANG Cong | ddf97cc | 2016-02-22 15:57:53 -0800 | [diff] [blame] | 350 | int ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 351 | |
WANG Cong | ddf97cc | 2016-02-22 15:57:53 -0800 | [diff] [blame] | 352 | if (!act->act || !act->dump || !act->init || !act->walk || !act->lookup) |
Jamal Hadi Salim | 76c82d7 | 2013-12-04 09:26:52 -0500 | [diff] [blame] | 353 | return -EINVAL; |
| 354 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 355 | write_lock(&act_mod_lock); |
WANG Cong | 1f747c2 | 2013-12-15 20:15:10 -0800 | [diff] [blame] | 356 | list_for_each_entry(a, &act_base, head) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 357 | if (act->type == a->type || (strcmp(act->kind, a->kind) == 0)) { |
| 358 | write_unlock(&act_mod_lock); |
| 359 | return -EEXIST; |
| 360 | } |
| 361 | } |
WANG Cong | 1f747c2 | 2013-12-15 20:15:10 -0800 | [diff] [blame] | 362 | list_add_tail(&act->head, &act_base); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 363 | write_unlock(&act_mod_lock); |
WANG Cong | ddf97cc | 2016-02-22 15:57:53 -0800 | [diff] [blame] | 364 | |
| 365 | ret = register_pernet_subsys(ops); |
| 366 | if (ret) { |
| 367 | tcf_unregister_action(act, ops); |
| 368 | return ret; |
| 369 | } |
| 370 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 371 | return 0; |
| 372 | } |
Patrick McHardy | 62e3ba1 | 2008-01-22 22:10:23 -0800 | [diff] [blame] | 373 | EXPORT_SYMBOL(tcf_register_action); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 374 | |
WANG Cong | ddf97cc | 2016-02-22 15:57:53 -0800 | [diff] [blame] | 375 | int tcf_unregister_action(struct tc_action_ops *act, |
| 376 | struct pernet_operations *ops) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 377 | { |
WANG Cong | 1f747c2 | 2013-12-15 20:15:10 -0800 | [diff] [blame] | 378 | struct tc_action_ops *a; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 379 | int err = -ENOENT; |
| 380 | |
WANG Cong | ddf97cc | 2016-02-22 15:57:53 -0800 | [diff] [blame] | 381 | unregister_pernet_subsys(ops); |
| 382 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 383 | write_lock(&act_mod_lock); |
Eric Dumazet | a792866 | 2013-12-20 12:32:32 -0800 | [diff] [blame] | 384 | list_for_each_entry(a, &act_base, head) { |
| 385 | if (a == act) { |
| 386 | list_del(&act->head); |
| 387 | err = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 388 | break; |
Eric Dumazet | a792866 | 2013-12-20 12:32:32 -0800 | [diff] [blame] | 389 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 390 | } |
| 391 | write_unlock(&act_mod_lock); |
| 392 | return err; |
| 393 | } |
Patrick McHardy | 62e3ba1 | 2008-01-22 22:10:23 -0800 | [diff] [blame] | 394 | EXPORT_SYMBOL(tcf_unregister_action); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 395 | |
| 396 | /* lookup by name */ |
| 397 | static struct tc_action_ops *tc_lookup_action_n(char *kind) |
| 398 | { |
Eric Dumazet | a792866 | 2013-12-20 12:32:32 -0800 | [diff] [blame] | 399 | struct tc_action_ops *a, *res = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 400 | |
| 401 | if (kind) { |
| 402 | read_lock(&act_mod_lock); |
WANG Cong | 1f747c2 | 2013-12-15 20:15:10 -0800 | [diff] [blame] | 403 | list_for_each_entry(a, &act_base, head) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 404 | if (strcmp(kind, a->kind) == 0) { |
Eric Dumazet | a792866 | 2013-12-20 12:32:32 -0800 | [diff] [blame] | 405 | if (try_module_get(a->owner)) |
| 406 | res = a; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 407 | break; |
| 408 | } |
| 409 | } |
| 410 | read_unlock(&act_mod_lock); |
| 411 | } |
Eric Dumazet | a792866 | 2013-12-20 12:32:32 -0800 | [diff] [blame] | 412 | return res; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 413 | } |
| 414 | |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 415 | /* lookup by nlattr */ |
| 416 | static struct tc_action_ops *tc_lookup_action(struct nlattr *kind) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 417 | { |
Eric Dumazet | a792866 | 2013-12-20 12:32:32 -0800 | [diff] [blame] | 418 | struct tc_action_ops *a, *res = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 419 | |
| 420 | if (kind) { |
| 421 | read_lock(&act_mod_lock); |
WANG Cong | 1f747c2 | 2013-12-15 20:15:10 -0800 | [diff] [blame] | 422 | list_for_each_entry(a, &act_base, head) { |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 423 | if (nla_strcmp(kind, a->kind) == 0) { |
Eric Dumazet | a792866 | 2013-12-20 12:32:32 -0800 | [diff] [blame] | 424 | if (try_module_get(a->owner)) |
| 425 | res = a; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 426 | break; |
| 427 | } |
| 428 | } |
| 429 | read_unlock(&act_mod_lock); |
| 430 | } |
Eric Dumazet | a792866 | 2013-12-20 12:32:32 -0800 | [diff] [blame] | 431 | return res; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 432 | } |
| 433 | |
WANG Cong | 33be627 | 2013-12-15 20:15:05 -0800 | [diff] [blame] | 434 | int tcf_action_exec(struct sk_buff *skb, const struct list_head *actions, |
YOSHIFUJI Hideaki | 10297b9 | 2007-02-09 23:25:16 +0900 | [diff] [blame] | 435 | struct tcf_result *res) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 436 | { |
Eric Dumazet | dc7f9f6 | 2011-07-05 23:25:42 +0000 | [diff] [blame] | 437 | const struct tc_action *a; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 438 | int ret = -1; |
| 439 | |
| 440 | if (skb->tc_verd & TC_NCLS) { |
| 441 | skb->tc_verd = CLR_TC_NCLS(skb->tc_verd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 442 | ret = TC_ACT_OK; |
| 443 | goto exec_done; |
| 444 | } |
WANG Cong | 33be627 | 2013-12-15 20:15:05 -0800 | [diff] [blame] | 445 | list_for_each_entry(a, actions, list) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 446 | repeat: |
Jamal Hadi Salim | 63acd68 | 2013-12-23 08:02:12 -0500 | [diff] [blame] | 447 | ret = a->ops->act(skb, a, res); |
Jamal Hadi Salim | 63acd68 | 2013-12-23 08:02:12 -0500 | [diff] [blame] | 448 | if (ret == TC_ACT_REPEAT) |
| 449 | goto repeat; /* we need a ttl - JHS */ |
| 450 | if (ret != TC_ACT_PIPE) |
| 451 | goto exec_done; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 452 | } |
| 453 | exec_done: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 454 | return ret; |
| 455 | } |
Patrick McHardy | 62e3ba1 | 2008-01-22 22:10:23 -0800 | [diff] [blame] | 456 | EXPORT_SYMBOL(tcf_action_exec); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 457 | |
WANG Cong | 55334a5 | 2014-02-11 17:07:34 -0800 | [diff] [blame] | 458 | int tcf_action_destroy(struct list_head *actions, int bind) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 459 | { |
WANG Cong | 33be627 | 2013-12-15 20:15:05 -0800 | [diff] [blame] | 460 | struct tc_action *a, *tmp; |
WANG Cong | 55334a5 | 2014-02-11 17:07:34 -0800 | [diff] [blame] | 461 | int ret = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 462 | |
WANG Cong | 33be627 | 2013-12-15 20:15:05 -0800 | [diff] [blame] | 463 | list_for_each_entry_safe(a, tmp, actions, list) { |
Daniel Borkmann | 28e6b67 | 2015-07-29 23:35:25 +0200 | [diff] [blame] | 464 | ret = __tcf_hash_release(a, bind, true); |
WANG Cong | 55334a5 | 2014-02-11 17:07:34 -0800 | [diff] [blame] | 465 | if (ret == ACT_P_DELETED) |
Jamal Hadi Salim | 63acd68 | 2013-12-23 08:02:12 -0500 | [diff] [blame] | 466 | module_put(a->ops->owner); |
WANG Cong | 55334a5 | 2014-02-11 17:07:34 -0800 | [diff] [blame] | 467 | else if (ret < 0) |
| 468 | return ret; |
Jamal Hadi Salim | 63acd68 | 2013-12-23 08:02:12 -0500 | [diff] [blame] | 469 | list_del(&a->list); |
| 470 | kfree(a); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 471 | } |
WANG Cong | 55334a5 | 2014-02-11 17:07:34 -0800 | [diff] [blame] | 472 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 473 | } |
| 474 | |
| 475 | int |
| 476 | tcf_action_dump_old(struct sk_buff *skb, struct tc_action *a, int bind, int ref) |
| 477 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 478 | return a->ops->dump(skb, a, bind, ref); |
| 479 | } |
| 480 | |
| 481 | int |
| 482 | tcf_action_dump_1(struct sk_buff *skb, struct tc_action *a, int bind, int ref) |
| 483 | { |
| 484 | int err = -EINVAL; |
Arnaldo Carvalho de Melo | 27a884d | 2007-04-19 20:29:13 -0700 | [diff] [blame] | 485 | unsigned char *b = skb_tail_pointer(skb); |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 486 | struct nlattr *nest; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 487 | |
David S. Miller | 1b34ec4 | 2012-03-29 05:11:39 -0400 | [diff] [blame] | 488 | if (nla_put_string(skb, TCA_KIND, a->ops->kind)) |
| 489 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 490 | if (tcf_action_copy_stats(skb, a, 0)) |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 491 | goto nla_put_failure; |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 492 | nest = nla_nest_start(skb, TCA_OPTIONS); |
| 493 | if (nest == NULL) |
| 494 | goto nla_put_failure; |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 495 | err = tcf_action_dump_old(skb, a, bind, ref); |
| 496 | if (err > 0) { |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 497 | nla_nest_end(skb, nest); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 498 | return err; |
| 499 | } |
| 500 | |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 501 | nla_put_failure: |
Arnaldo Carvalho de Melo | dc5fc57 | 2007-03-25 23:06:12 -0700 | [diff] [blame] | 502 | nlmsg_trim(skb, b); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 503 | return -1; |
| 504 | } |
Patrick McHardy | 62e3ba1 | 2008-01-22 22:10:23 -0800 | [diff] [blame] | 505 | EXPORT_SYMBOL(tcf_action_dump_1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 506 | |
Jamal Hadi Salim | 0b0f43f | 2016-06-05 10:41:32 -0400 | [diff] [blame] | 507 | int tcf_action_dump(struct sk_buff *skb, struct list_head *actions, |
| 508 | int bind, int ref) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 509 | { |
| 510 | struct tc_action *a; |
| 511 | int err = -EINVAL; |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 512 | struct nlattr *nest; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 513 | |
WANG Cong | 33be627 | 2013-12-15 20:15:05 -0800 | [diff] [blame] | 514 | list_for_each_entry(a, actions, list) { |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 515 | nest = nla_nest_start(skb, a->order); |
| 516 | if (nest == NULL) |
| 517 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 518 | err = tcf_action_dump_1(skb, a, bind, ref); |
| 519 | if (err < 0) |
Thomas Graf | 4fe683f | 2006-07-05 20:47:28 -0700 | [diff] [blame] | 520 | goto errout; |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 521 | nla_nest_end(skb, nest); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 522 | } |
| 523 | |
| 524 | return 0; |
| 525 | |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 526 | nla_put_failure: |
Thomas Graf | 4fe683f | 2006-07-05 20:47:28 -0700 | [diff] [blame] | 527 | err = -EINVAL; |
| 528 | errout: |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 529 | nla_nest_cancel(skb, nest); |
Thomas Graf | 4fe683f | 2006-07-05 20:47:28 -0700 | [diff] [blame] | 530 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 531 | } |
| 532 | |
Benjamin LaHaise | c1b5273 | 2013-01-14 05:15:39 +0000 | [diff] [blame] | 533 | struct tc_action *tcf_action_init_1(struct net *net, struct nlattr *nla, |
| 534 | struct nlattr *est, char *name, int ovr, |
| 535 | int bind) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 536 | { |
| 537 | struct tc_action *a; |
| 538 | struct tc_action_ops *a_o; |
| 539 | char act_name[IFNAMSIZ]; |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 540 | struct nlattr *tb[TCA_ACT_MAX + 1]; |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 541 | struct nlattr *kind; |
Patrick McHardy | ab27cfb | 2008-01-23 20:33:13 -0800 | [diff] [blame] | 542 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 543 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 544 | if (name == NULL) { |
Patrick McHardy | cee6372 | 2008-01-23 20:33:32 -0800 | [diff] [blame] | 545 | err = nla_parse_nested(tb, TCA_ACT_MAX, nla, NULL); |
| 546 | if (err < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 547 | goto err_out; |
Patrick McHardy | cee6372 | 2008-01-23 20:33:32 -0800 | [diff] [blame] | 548 | err = -EINVAL; |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 549 | kind = tb[TCA_ACT_KIND]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 550 | if (kind == NULL) |
| 551 | goto err_out; |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 552 | if (nla_strlcpy(act_name, kind, IFNAMSIZ) >= IFNAMSIZ) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 553 | goto err_out; |
| 554 | } else { |
Patrick McHardy | cee6372 | 2008-01-23 20:33:32 -0800 | [diff] [blame] | 555 | err = -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 556 | if (strlcpy(act_name, name, IFNAMSIZ) >= IFNAMSIZ) |
| 557 | goto err_out; |
| 558 | } |
| 559 | |
| 560 | a_o = tc_lookup_action_n(act_name); |
| 561 | if (a_o == NULL) { |
Johannes Berg | 95a5afc | 2008-10-16 15:24:51 -0700 | [diff] [blame] | 562 | #ifdef CONFIG_MODULES |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 563 | rtnl_unlock(); |
Patrick McHardy | 4bba392 | 2006-01-08 22:22:14 -0800 | [diff] [blame] | 564 | request_module("act_%s", act_name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 565 | rtnl_lock(); |
| 566 | |
| 567 | a_o = tc_lookup_action_n(act_name); |
| 568 | |
| 569 | /* We dropped the RTNL semaphore in order to |
| 570 | * perform the module load. So, even if we |
| 571 | * succeeded in loading the module we have to |
| 572 | * tell the caller to replay the request. We |
| 573 | * indicate this using -EAGAIN. |
| 574 | */ |
| 575 | if (a_o != NULL) { |
Patrick McHardy | ab27cfb | 2008-01-23 20:33:13 -0800 | [diff] [blame] | 576 | err = -EAGAIN; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 577 | goto err_mod; |
| 578 | } |
| 579 | #endif |
Patrick McHardy | ab27cfb | 2008-01-23 20:33:13 -0800 | [diff] [blame] | 580 | err = -ENOENT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 581 | goto err_out; |
| 582 | } |
| 583 | |
Patrick McHardy | ab27cfb | 2008-01-23 20:33:13 -0800 | [diff] [blame] | 584 | err = -ENOMEM; |
Panagiotis Issaris | 0da974f | 2006-07-21 14:51:30 -0700 | [diff] [blame] | 585 | a = kzalloc(sizeof(*a), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 586 | if (a == NULL) |
| 587 | goto err_mod; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 588 | |
WANG Cong | c779f7a | 2014-01-17 11:37:02 -0800 | [diff] [blame] | 589 | a->ops = a_o; |
WANG Cong | 33be627 | 2013-12-15 20:15:05 -0800 | [diff] [blame] | 590 | INIT_LIST_HEAD(&a->list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 591 | /* backward compatibility for policer */ |
| 592 | if (name == NULL) |
Benjamin LaHaise | c1b5273 | 2013-01-14 05:15:39 +0000 | [diff] [blame] | 593 | err = a_o->init(net, tb[TCA_ACT_OPTIONS], est, a, ovr, bind); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 594 | else |
Benjamin LaHaise | c1b5273 | 2013-01-14 05:15:39 +0000 | [diff] [blame] | 595 | err = a_o->init(net, nla, est, a, ovr, bind); |
Patrick McHardy | ab27cfb | 2008-01-23 20:33:13 -0800 | [diff] [blame] | 596 | if (err < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 597 | goto err_free; |
| 598 | |
| 599 | /* module count goes up only when brand new policy is created |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 600 | * if it exists and is only bound to in a_o->init() then |
| 601 | * ACT_P_CREATED is not returned (a zero is). |
| 602 | */ |
Patrick McHardy | ab27cfb | 2008-01-23 20:33:13 -0800 | [diff] [blame] | 603 | if (err != ACT_P_CREATED) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 604 | module_put(a_o->owner); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 605 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 606 | return a; |
| 607 | |
| 608 | err_free: |
| 609 | kfree(a); |
| 610 | err_mod: |
| 611 | module_put(a_o->owner); |
| 612 | err_out: |
Patrick McHardy | ab27cfb | 2008-01-23 20:33:13 -0800 | [diff] [blame] | 613 | return ERR_PTR(err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 614 | } |
| 615 | |
WANG Cong | 33be627 | 2013-12-15 20:15:05 -0800 | [diff] [blame] | 616 | int tcf_action_init(struct net *net, struct nlattr *nla, |
Benjamin LaHaise | c1b5273 | 2013-01-14 05:15:39 +0000 | [diff] [blame] | 617 | struct nlattr *est, char *name, int ovr, |
WANG Cong | 33be627 | 2013-12-15 20:15:05 -0800 | [diff] [blame] | 618 | int bind, struct list_head *actions) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 619 | { |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 620 | struct nlattr *tb[TCA_ACT_MAX_PRIO + 1]; |
WANG Cong | 33be627 | 2013-12-15 20:15:05 -0800 | [diff] [blame] | 621 | struct tc_action *act; |
Patrick McHardy | cee6372 | 2008-01-23 20:33:32 -0800 | [diff] [blame] | 622 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 623 | int i; |
| 624 | |
Patrick McHardy | cee6372 | 2008-01-23 20:33:32 -0800 | [diff] [blame] | 625 | err = nla_parse_nested(tb, TCA_ACT_MAX_PRIO, nla, NULL); |
| 626 | if (err < 0) |
WANG Cong | 33be627 | 2013-12-15 20:15:05 -0800 | [diff] [blame] | 627 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 628 | |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 629 | for (i = 1; i <= TCA_ACT_MAX_PRIO && tb[i]; i++) { |
Benjamin LaHaise | c1b5273 | 2013-01-14 05:15:39 +0000 | [diff] [blame] | 630 | act = tcf_action_init_1(net, tb[i], est, name, ovr, bind); |
WANG Cong | 33be627 | 2013-12-15 20:15:05 -0800 | [diff] [blame] | 631 | if (IS_ERR(act)) { |
| 632 | err = PTR_ERR(act); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 633 | goto err; |
WANG Cong | 33be627 | 2013-12-15 20:15:05 -0800 | [diff] [blame] | 634 | } |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 635 | act->order = i; |
WANG Cong | 33be627 | 2013-12-15 20:15:05 -0800 | [diff] [blame] | 636 | list_add_tail(&act->list, actions); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 637 | } |
WANG Cong | 33be627 | 2013-12-15 20:15:05 -0800 | [diff] [blame] | 638 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 639 | |
| 640 | err: |
WANG Cong | 33be627 | 2013-12-15 20:15:05 -0800 | [diff] [blame] | 641 | tcf_action_destroy(actions, bind); |
| 642 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 643 | } |
| 644 | |
| 645 | int tcf_action_copy_stats(struct sk_buff *skb, struct tc_action *a, |
| 646 | int compat_mode) |
| 647 | { |
| 648 | int err = 0; |
| 649 | struct gnet_dump d; |
WANG Cong | 7eb8896 | 2014-01-09 16:14:05 -0800 | [diff] [blame] | 650 | struct tcf_common *p = a->priv; |
YOSHIFUJI Hideaki | 10297b9 | 2007-02-09 23:25:16 +0900 | [diff] [blame] | 651 | |
WANG Cong | 7eb8896 | 2014-01-09 16:14:05 -0800 | [diff] [blame] | 652 | if (p == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 653 | goto errout; |
| 654 | |
| 655 | /* compat_mode being true specifies a call that is supposed |
Dirk Hohndel | 06fe9fb | 2009-09-28 21:43:57 -0400 | [diff] [blame] | 656 | * to add additional backward compatibility statistic TLVs. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 657 | */ |
| 658 | if (compat_mode) { |
| 659 | if (a->type == TCA_OLD_COMPAT) |
| 660 | err = gnet_stats_start_copy_compat(skb, 0, |
Nicolas Dichtel | 9854518 | 2016-04-26 10:06:18 +0200 | [diff] [blame] | 661 | TCA_STATS, |
| 662 | TCA_XSTATS, |
| 663 | &p->tcfc_lock, &d, |
| 664 | TCA_PAD); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 665 | else |
| 666 | return 0; |
| 667 | } else |
| 668 | err = gnet_stats_start_copy(skb, TCA_ACT_STATS, |
Nicolas Dichtel | 9854518 | 2016-04-26 10:06:18 +0200 | [diff] [blame] | 669 | &p->tcfc_lock, &d, TCA_ACT_PAD); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 670 | |
| 671 | if (err < 0) |
| 672 | goto errout; |
| 673 | |
Eric Dumazet | edb09eb | 2016-06-06 09:37:16 -0700 | [diff] [blame] | 674 | if (gnet_stats_copy_basic(NULL, &d, p->cpu_bstats, &p->tcfc_bstats) < 0 || |
WANG Cong | 7eb8896 | 2014-01-09 16:14:05 -0800 | [diff] [blame] | 675 | gnet_stats_copy_rate_est(&d, &p->tcfc_bstats, |
| 676 | &p->tcfc_rate_est) < 0 || |
Eric Dumazet | 519c818 | 2015-07-06 05:18:04 -0700 | [diff] [blame] | 677 | gnet_stats_copy_queue(&d, p->cpu_qstats, |
John Fastabend | 6401585 | 2014-09-28 11:53:57 -0700 | [diff] [blame] | 678 | &p->tcfc_qstats, |
| 679 | p->tcfc_qstats.qlen) < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 680 | goto errout; |
| 681 | |
| 682 | if (gnet_stats_finish_copy(&d) < 0) |
| 683 | goto errout; |
| 684 | |
| 685 | return 0; |
| 686 | |
| 687 | errout: |
| 688 | return -1; |
| 689 | } |
| 690 | |
Jamal Hadi Salim | 0b0f43f | 2016-06-05 10:41:32 -0400 | [diff] [blame] | 691 | static int tca_get_fill(struct sk_buff *skb, struct list_head *actions, |
| 692 | u32 portid, u32 seq, u16 flags, int event, int bind, |
| 693 | int ref) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 694 | { |
| 695 | struct tcamsg *t; |
| 696 | struct nlmsghdr *nlh; |
Arnaldo Carvalho de Melo | 27a884d | 2007-04-19 20:29:13 -0700 | [diff] [blame] | 697 | unsigned char *b = skb_tail_pointer(skb); |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 698 | struct nlattr *nest; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 699 | |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 700 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(*t), flags); |
David S. Miller | 8b00a53 | 2012-06-26 21:39:32 -0700 | [diff] [blame] | 701 | if (!nlh) |
| 702 | goto out_nlmsg_trim; |
| 703 | t = nlmsg_data(nlh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 704 | t->tca_family = AF_UNSPEC; |
Patrick McHardy | 9ef1d4c | 2005-06-28 12:55:30 -0700 | [diff] [blame] | 705 | t->tca__pad1 = 0; |
| 706 | t->tca__pad2 = 0; |
YOSHIFUJI Hideaki | 10297b9 | 2007-02-09 23:25:16 +0900 | [diff] [blame] | 707 | |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 708 | nest = nla_nest_start(skb, TCA_ACT_TAB); |
| 709 | if (nest == NULL) |
David S. Miller | 8b00a53 | 2012-06-26 21:39:32 -0700 | [diff] [blame] | 710 | goto out_nlmsg_trim; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 711 | |
WANG Cong | 33be627 | 2013-12-15 20:15:05 -0800 | [diff] [blame] | 712 | if (tcf_action_dump(skb, actions, bind, ref) < 0) |
David S. Miller | 8b00a53 | 2012-06-26 21:39:32 -0700 | [diff] [blame] | 713 | goto out_nlmsg_trim; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 714 | |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 715 | nla_nest_end(skb, nest); |
YOSHIFUJI Hideaki | 10297b9 | 2007-02-09 23:25:16 +0900 | [diff] [blame] | 716 | |
Arnaldo Carvalho de Melo | 27a884d | 2007-04-19 20:29:13 -0700 | [diff] [blame] | 717 | nlh->nlmsg_len = skb_tail_pointer(skb) - b; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 718 | return skb->len; |
| 719 | |
David S. Miller | 8b00a53 | 2012-06-26 21:39:32 -0700 | [diff] [blame] | 720 | out_nlmsg_trim: |
Arnaldo Carvalho de Melo | dc5fc57 | 2007-03-25 23:06:12 -0700 | [diff] [blame] | 721 | nlmsg_trim(skb, b); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 722 | return -1; |
| 723 | } |
| 724 | |
| 725 | static int |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 726 | act_get_notify(struct net *net, u32 portid, struct nlmsghdr *n, |
WANG Cong | 33be627 | 2013-12-15 20:15:05 -0800 | [diff] [blame] | 727 | struct list_head *actions, int event) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 728 | { |
| 729 | struct sk_buff *skb; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 730 | |
| 731 | skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); |
| 732 | if (!skb) |
| 733 | return -ENOBUFS; |
Jamal Hadi Salim | 0b0f43f | 2016-06-05 10:41:32 -0400 | [diff] [blame] | 734 | if (tca_get_fill(skb, actions, portid, n->nlmsg_seq, 0, event, |
| 735 | 0, 0) <= 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 736 | kfree_skb(skb); |
| 737 | return -EINVAL; |
| 738 | } |
Thomas Graf | 2942e90 | 2006-08-15 00:30:25 -0700 | [diff] [blame] | 739 | |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 740 | return rtnl_unicast(skb, net, portid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 741 | } |
| 742 | |
WANG Cong | 03701d6 | 2014-02-11 17:07:35 -0800 | [diff] [blame] | 743 | static struct tc_action *create_a(int i) |
| 744 | { |
| 745 | struct tc_action *act; |
| 746 | |
| 747 | act = kzalloc(sizeof(*act), GFP_KERNEL); |
| 748 | if (act == NULL) { |
| 749 | pr_debug("create_a: failed to alloc!\n"); |
| 750 | return NULL; |
| 751 | } |
| 752 | act->order = i; |
| 753 | INIT_LIST_HEAD(&act->list); |
| 754 | return act; |
| 755 | } |
| 756 | |
WANG Cong | ddf97cc | 2016-02-22 15:57:53 -0800 | [diff] [blame] | 757 | static struct tc_action *tcf_action_get_1(struct net *net, struct nlattr *nla, |
| 758 | struct nlmsghdr *n, u32 portid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 759 | { |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 760 | struct nlattr *tb[TCA_ACT_MAX + 1]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 761 | struct tc_action *a; |
| 762 | int index; |
Patrick McHardy | ab27cfb | 2008-01-23 20:33:13 -0800 | [diff] [blame] | 763 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 764 | |
Patrick McHardy | cee6372 | 2008-01-23 20:33:32 -0800 | [diff] [blame] | 765 | err = nla_parse_nested(tb, TCA_ACT_MAX, nla, NULL); |
| 766 | if (err < 0) |
Patrick McHardy | ab27cfb | 2008-01-23 20:33:13 -0800 | [diff] [blame] | 767 | goto err_out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 768 | |
Patrick McHardy | cee6372 | 2008-01-23 20:33:32 -0800 | [diff] [blame] | 769 | err = -EINVAL; |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 770 | if (tb[TCA_ACT_INDEX] == NULL || |
| 771 | nla_len(tb[TCA_ACT_INDEX]) < sizeof(index)) |
Patrick McHardy | ab27cfb | 2008-01-23 20:33:13 -0800 | [diff] [blame] | 772 | goto err_out; |
Patrick McHardy | 1587bac | 2008-01-23 20:35:03 -0800 | [diff] [blame] | 773 | index = nla_get_u32(tb[TCA_ACT_INDEX]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 774 | |
Patrick McHardy | ab27cfb | 2008-01-23 20:33:13 -0800 | [diff] [blame] | 775 | err = -ENOMEM; |
WANG Cong | 03701d6 | 2014-02-11 17:07:35 -0800 | [diff] [blame] | 776 | a = create_a(0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 777 | if (a == NULL) |
Patrick McHardy | ab27cfb | 2008-01-23 20:33:13 -0800 | [diff] [blame] | 778 | goto err_out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 779 | |
Patrick McHardy | ab27cfb | 2008-01-23 20:33:13 -0800 | [diff] [blame] | 780 | err = -EINVAL; |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 781 | a->ops = tc_lookup_action(tb[TCA_ACT_KIND]); |
Jamal Hadi Salim | 63acd68 | 2013-12-23 08:02:12 -0500 | [diff] [blame] | 782 | if (a->ops == NULL) /* could happen in batch of actions */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 783 | goto err_free; |
Patrick McHardy | ab27cfb | 2008-01-23 20:33:13 -0800 | [diff] [blame] | 784 | err = -ENOENT; |
WANG Cong | ddf97cc | 2016-02-22 15:57:53 -0800 | [diff] [blame] | 785 | if (a->ops->lookup(net, a, index) == 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 786 | goto err_mod; |
| 787 | |
| 788 | module_put(a->ops->owner); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 789 | return a; |
Patrick McHardy | ab27cfb | 2008-01-23 20:33:13 -0800 | [diff] [blame] | 790 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 791 | err_mod: |
| 792 | module_put(a->ops->owner); |
| 793 | err_free: |
| 794 | kfree(a); |
Patrick McHardy | ab27cfb | 2008-01-23 20:33:13 -0800 | [diff] [blame] | 795 | err_out: |
| 796 | return ERR_PTR(err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 797 | } |
| 798 | |
WANG Cong | 33be627 | 2013-12-15 20:15:05 -0800 | [diff] [blame] | 799 | static void cleanup_a(struct list_head *actions) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 800 | { |
WANG Cong | 33be627 | 2013-12-15 20:15:05 -0800 | [diff] [blame] | 801 | struct tc_action *a, *tmp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 802 | |
WANG Cong | 33be627 | 2013-12-15 20:15:05 -0800 | [diff] [blame] | 803 | list_for_each_entry_safe(a, tmp, actions, list) { |
| 804 | list_del(&a->list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 805 | kfree(a); |
| 806 | } |
| 807 | } |
| 808 | |
Tom Goff | 7316ae8 | 2010-03-19 15:40:13 +0000 | [diff] [blame] | 809 | static int tca_action_flush(struct net *net, struct nlattr *nla, |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 810 | struct nlmsghdr *n, u32 portid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 811 | { |
| 812 | struct sk_buff *skb; |
| 813 | unsigned char *b; |
| 814 | struct nlmsghdr *nlh; |
| 815 | struct tcamsg *t; |
| 816 | struct netlink_callback dcb; |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 817 | struct nlattr *nest; |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 818 | struct nlattr *tb[TCA_ACT_MAX + 1]; |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 819 | struct nlattr *kind; |
WANG Cong | 03701d6 | 2014-02-11 17:07:35 -0800 | [diff] [blame] | 820 | struct tc_action a; |
Jamal Hadi Salim | 3672387 | 2008-08-13 02:41:45 -0700 | [diff] [blame] | 821 | int err = -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 822 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 823 | skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); |
| 824 | if (!skb) { |
stephen hemminger | 6ff9c36 | 2010-05-12 06:37:05 +0000 | [diff] [blame] | 825 | pr_debug("tca_action_flush: failed skb alloc\n"); |
Jamal Hadi Salim | 3672387 | 2008-08-13 02:41:45 -0700 | [diff] [blame] | 826 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 827 | } |
| 828 | |
Arnaldo Carvalho de Melo | 27a884d | 2007-04-19 20:29:13 -0700 | [diff] [blame] | 829 | b = skb_tail_pointer(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 830 | |
Patrick McHardy | cee6372 | 2008-01-23 20:33:32 -0800 | [diff] [blame] | 831 | err = nla_parse_nested(tb, TCA_ACT_MAX, nla, NULL); |
| 832 | if (err < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 833 | goto err_out; |
| 834 | |
Patrick McHardy | cee6372 | 2008-01-23 20:33:32 -0800 | [diff] [blame] | 835 | err = -EINVAL; |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 836 | kind = tb[TCA_ACT_KIND]; |
WANG Cong | 03701d6 | 2014-02-11 17:07:35 -0800 | [diff] [blame] | 837 | memset(&a, 0, sizeof(struct tc_action)); |
| 838 | INIT_LIST_HEAD(&a.list); |
| 839 | a.ops = tc_lookup_action(kind); |
| 840 | if (a.ops == NULL) /*some idjot trying to flush unknown action */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 841 | goto err_out; |
| 842 | |
Jamal Hadi Salim | 0b0f43f | 2016-06-05 10:41:32 -0400 | [diff] [blame] | 843 | nlh = nlmsg_put(skb, portid, n->nlmsg_seq, RTM_DELACTION, |
| 844 | sizeof(*t), 0); |
David S. Miller | 8b00a53 | 2012-06-26 21:39:32 -0700 | [diff] [blame] | 845 | if (!nlh) |
| 846 | goto out_module_put; |
| 847 | t = nlmsg_data(nlh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 848 | t->tca_family = AF_UNSPEC; |
Patrick McHardy | 9ef1d4c | 2005-06-28 12:55:30 -0700 | [diff] [blame] | 849 | t->tca__pad1 = 0; |
| 850 | t->tca__pad2 = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 851 | |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 852 | nest = nla_nest_start(skb, TCA_ACT_TAB); |
| 853 | if (nest == NULL) |
David S. Miller | 8b00a53 | 2012-06-26 21:39:32 -0700 | [diff] [blame] | 854 | goto out_module_put; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 855 | |
WANG Cong | ddf97cc | 2016-02-22 15:57:53 -0800 | [diff] [blame] | 856 | err = a.ops->walk(net, skb, &dcb, RTM_DELACTION, &a); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 857 | if (err < 0) |
David S. Miller | 8b00a53 | 2012-06-26 21:39:32 -0700 | [diff] [blame] | 858 | goto out_module_put; |
Jamal Hadi Salim | f97017c | 2008-08-13 02:41:22 -0700 | [diff] [blame] | 859 | if (err == 0) |
| 860 | goto noflush_out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 861 | |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 862 | nla_nest_end(skb, nest); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 863 | |
Arnaldo Carvalho de Melo | 27a884d | 2007-04-19 20:29:13 -0700 | [diff] [blame] | 864 | nlh->nlmsg_len = skb_tail_pointer(skb) - b; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 865 | nlh->nlmsg_flags |= NLM_F_ROOT; |
WANG Cong | 03701d6 | 2014-02-11 17:07:35 -0800 | [diff] [blame] | 866 | module_put(a.ops->owner); |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 867 | err = rtnetlink_send(skb, net, portid, RTNLGRP_TC, |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 868 | n->nlmsg_flags & NLM_F_ECHO); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 869 | if (err > 0) |
| 870 | return 0; |
| 871 | |
| 872 | return err; |
| 873 | |
David S. Miller | 8b00a53 | 2012-06-26 21:39:32 -0700 | [diff] [blame] | 874 | out_module_put: |
WANG Cong | 03701d6 | 2014-02-11 17:07:35 -0800 | [diff] [blame] | 875 | module_put(a.ops->owner); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 876 | err_out: |
Jamal Hadi Salim | f97017c | 2008-08-13 02:41:22 -0700 | [diff] [blame] | 877 | noflush_out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 878 | kfree_skb(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 879 | return err; |
| 880 | } |
| 881 | |
| 882 | static int |
WANG Cong | a56e195 | 2014-01-09 16:14:00 -0800 | [diff] [blame] | 883 | tcf_del_notify(struct net *net, struct nlmsghdr *n, struct list_head *actions, |
| 884 | u32 portid) |
| 885 | { |
| 886 | int ret; |
| 887 | struct sk_buff *skb; |
| 888 | |
| 889 | skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); |
| 890 | if (!skb) |
| 891 | return -ENOBUFS; |
| 892 | |
| 893 | if (tca_get_fill(skb, actions, portid, n->nlmsg_seq, 0, RTM_DELACTION, |
| 894 | 0, 1) <= 0) { |
| 895 | kfree_skb(skb); |
| 896 | return -EINVAL; |
| 897 | } |
| 898 | |
| 899 | /* now do the delete */ |
WANG Cong | 55334a5 | 2014-02-11 17:07:34 -0800 | [diff] [blame] | 900 | ret = tcf_action_destroy(actions, 0); |
| 901 | if (ret < 0) { |
| 902 | kfree_skb(skb); |
| 903 | return ret; |
| 904 | } |
WANG Cong | a56e195 | 2014-01-09 16:14:00 -0800 | [diff] [blame] | 905 | |
| 906 | ret = rtnetlink_send(skb, net, portid, RTNLGRP_TC, |
| 907 | n->nlmsg_flags & NLM_F_ECHO); |
| 908 | if (ret > 0) |
| 909 | return 0; |
| 910 | return ret; |
| 911 | } |
| 912 | |
| 913 | static int |
Tom Goff | 7316ae8 | 2010-03-19 15:40:13 +0000 | [diff] [blame] | 914 | tca_action_gd(struct net *net, struct nlattr *nla, struct nlmsghdr *n, |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 915 | u32 portid, int event) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 916 | { |
Patrick McHardy | cee6372 | 2008-01-23 20:33:32 -0800 | [diff] [blame] | 917 | int i, ret; |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 918 | struct nlattr *tb[TCA_ACT_MAX_PRIO + 1]; |
WANG Cong | 33be627 | 2013-12-15 20:15:05 -0800 | [diff] [blame] | 919 | struct tc_action *act; |
| 920 | LIST_HEAD(actions); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 921 | |
Patrick McHardy | cee6372 | 2008-01-23 20:33:32 -0800 | [diff] [blame] | 922 | ret = nla_parse_nested(tb, TCA_ACT_MAX_PRIO, nla, NULL); |
| 923 | if (ret < 0) |
| 924 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 925 | |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 926 | if (event == RTM_DELACTION && n->nlmsg_flags & NLM_F_ROOT) { |
Jamal Hadi Salim | f97017c | 2008-08-13 02:41:22 -0700 | [diff] [blame] | 927 | if (tb[1] != NULL) |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 928 | return tca_action_flush(net, tb[1], n, portid); |
Jamal Hadi Salim | f97017c | 2008-08-13 02:41:22 -0700 | [diff] [blame] | 929 | else |
| 930 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 931 | } |
| 932 | |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 933 | for (i = 1; i <= TCA_ACT_MAX_PRIO && tb[i]; i++) { |
WANG Cong | ddf97cc | 2016-02-22 15:57:53 -0800 | [diff] [blame] | 934 | act = tcf_action_get_1(net, tb[i], n, portid); |
Patrick McHardy | ab27cfb | 2008-01-23 20:33:13 -0800 | [diff] [blame] | 935 | if (IS_ERR(act)) { |
| 936 | ret = PTR_ERR(act); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 937 | goto err; |
Patrick McHardy | ab27cfb | 2008-01-23 20:33:13 -0800 | [diff] [blame] | 938 | } |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 939 | act->order = i; |
WANG Cong | 33be627 | 2013-12-15 20:15:05 -0800 | [diff] [blame] | 940 | list_add_tail(&act->list, &actions); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 941 | } |
| 942 | |
| 943 | if (event == RTM_GETACTION) |
WANG Cong | 33be627 | 2013-12-15 20:15:05 -0800 | [diff] [blame] | 944 | ret = act_get_notify(net, portid, n, &actions, event); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 945 | else { /* delete */ |
WANG Cong | a56e195 | 2014-01-09 16:14:00 -0800 | [diff] [blame] | 946 | ret = tcf_del_notify(net, n, &actions, portid); |
| 947 | if (ret) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 948 | goto err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 949 | return ret; |
| 950 | } |
| 951 | err: |
WANG Cong | 33be627 | 2013-12-15 20:15:05 -0800 | [diff] [blame] | 952 | cleanup_a(&actions); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 953 | return ret; |
| 954 | } |
| 955 | |
WANG Cong | a56e195 | 2014-01-09 16:14:00 -0800 | [diff] [blame] | 956 | static int |
| 957 | tcf_add_notify(struct net *net, struct nlmsghdr *n, struct list_head *actions, |
| 958 | u32 portid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 959 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 960 | struct sk_buff *skb; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 961 | int err = 0; |
| 962 | |
| 963 | skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); |
| 964 | if (!skb) |
| 965 | return -ENOBUFS; |
| 966 | |
WANG Cong | a56e195 | 2014-01-09 16:14:00 -0800 | [diff] [blame] | 967 | if (tca_get_fill(skb, actions, portid, n->nlmsg_seq, n->nlmsg_flags, |
| 968 | RTM_NEWACTION, 0, 0) <= 0) { |
| 969 | kfree_skb(skb); |
| 970 | return -EINVAL; |
| 971 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 972 | |
WANG Cong | a56e195 | 2014-01-09 16:14:00 -0800 | [diff] [blame] | 973 | err = rtnetlink_send(skb, net, portid, RTNLGRP_TC, |
| 974 | n->nlmsg_flags & NLM_F_ECHO); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 975 | if (err > 0) |
| 976 | err = 0; |
| 977 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 978 | } |
| 979 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 980 | static int |
Tom Goff | 7316ae8 | 2010-03-19 15:40:13 +0000 | [diff] [blame] | 981 | tcf_action_add(struct net *net, struct nlattr *nla, struct nlmsghdr *n, |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 982 | u32 portid, int ovr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 983 | { |
| 984 | int ret = 0; |
WANG Cong | 33be627 | 2013-12-15 20:15:05 -0800 | [diff] [blame] | 985 | LIST_HEAD(actions); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 986 | |
WANG Cong | 33be627 | 2013-12-15 20:15:05 -0800 | [diff] [blame] | 987 | ret = tcf_action_init(net, nla, NULL, NULL, ovr, 0, &actions); |
| 988 | if (ret) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 989 | goto done; |
| 990 | |
| 991 | /* dump then free all the actions after update; inserted policy |
| 992 | * stays intact |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 993 | */ |
WANG Cong | a56e195 | 2014-01-09 16:14:00 -0800 | [diff] [blame] | 994 | ret = tcf_add_notify(net, n, &actions, portid); |
WANG Cong | 33be627 | 2013-12-15 20:15:05 -0800 | [diff] [blame] | 995 | cleanup_a(&actions); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 996 | done: |
| 997 | return ret; |
| 998 | } |
| 999 | |
Thomas Graf | 661d296 | 2013-03-21 07:45:29 +0000 | [diff] [blame] | 1000 | static int tc_ctl_action(struct sk_buff *skb, struct nlmsghdr *n) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1001 | { |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 1002 | struct net *net = sock_net(skb->sk); |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 1003 | struct nlattr *tca[TCA_ACT_MAX + 1]; |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 1004 | u32 portid = skb ? NETLINK_CB(skb).portid : 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1005 | int ret = 0, ovr = 0; |
| 1006 | |
Jamal Hadi Salim | 0b0f43f | 2016-06-05 10:41:32 -0400 | [diff] [blame] | 1007 | if ((n->nlmsg_type != RTM_GETACTION) && |
| 1008 | !netlink_capable(skb, CAP_NET_ADMIN)) |
Eric W. Biederman | dfc47ef | 2012-11-16 03:03:00 +0000 | [diff] [blame] | 1009 | return -EPERM; |
| 1010 | |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 1011 | ret = nlmsg_parse(n, sizeof(struct tcamsg), tca, TCA_ACT_MAX, NULL); |
| 1012 | if (ret < 0) |
| 1013 | return ret; |
| 1014 | |
| 1015 | if (tca[TCA_ACT_TAB] == NULL) { |
stephen hemminger | 6ff9c36 | 2010-05-12 06:37:05 +0000 | [diff] [blame] | 1016 | pr_notice("tc_ctl_action: received NO action attribs\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1017 | return -EINVAL; |
| 1018 | } |
| 1019 | |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 1020 | /* n->nlmsg_flags & NLM_F_CREATE */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1021 | switch (n->nlmsg_type) { |
| 1022 | case RTM_NEWACTION: |
| 1023 | /* we are going to assume all other flags |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 1024 | * imply create only if it doesn't exist |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1025 | * Note that CREATE | EXCL implies that |
| 1026 | * but since we want avoid ambiguity (eg when flags |
| 1027 | * is zero) then just set this |
| 1028 | */ |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 1029 | if (n->nlmsg_flags & NLM_F_REPLACE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1030 | ovr = 1; |
| 1031 | replay: |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 1032 | ret = tcf_action_add(net, tca[TCA_ACT_TAB], n, portid, ovr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1033 | if (ret == -EAGAIN) |
| 1034 | goto replay; |
| 1035 | break; |
| 1036 | case RTM_DELACTION: |
Tom Goff | 7316ae8 | 2010-03-19 15:40:13 +0000 | [diff] [blame] | 1037 | ret = tca_action_gd(net, tca[TCA_ACT_TAB], n, |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 1038 | portid, RTM_DELACTION); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1039 | break; |
| 1040 | case RTM_GETACTION: |
Tom Goff | 7316ae8 | 2010-03-19 15:40:13 +0000 | [diff] [blame] | 1041 | ret = tca_action_gd(net, tca[TCA_ACT_TAB], n, |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 1042 | portid, RTM_GETACTION); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1043 | break; |
| 1044 | default: |
| 1045 | BUG(); |
| 1046 | } |
| 1047 | |
| 1048 | return ret; |
| 1049 | } |
| 1050 | |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 1051 | static struct nlattr * |
Patrick McHardy | 3a6c2b4 | 2009-08-25 16:07:40 +0200 | [diff] [blame] | 1052 | find_dump_kind(const struct nlmsghdr *n) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1053 | { |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 1054 | struct nlattr *tb1, *tb2[TCA_ACT_MAX + 1]; |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 1055 | struct nlattr *tb[TCA_ACT_MAX_PRIO + 1]; |
| 1056 | struct nlattr *nla[TCAA_MAX + 1]; |
| 1057 | struct nlattr *kind; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1058 | |
Patrick McHardy | c96c947 | 2008-01-23 20:32:58 -0800 | [diff] [blame] | 1059 | if (nlmsg_parse(n, sizeof(struct tcamsg), nla, TCAA_MAX, NULL) < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1060 | return NULL; |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 1061 | tb1 = nla[TCA_ACT_TAB]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1062 | if (tb1 == NULL) |
| 1063 | return NULL; |
| 1064 | |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 1065 | if (nla_parse(tb, TCA_ACT_MAX_PRIO, nla_data(tb1), |
| 1066 | NLMSG_ALIGN(nla_len(tb1)), NULL) < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1067 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1068 | |
Patrick McHardy | 6d834e0 | 2008-01-23 20:32:42 -0800 | [diff] [blame] | 1069 | if (tb[1] == NULL) |
| 1070 | return NULL; |
| 1071 | if (nla_parse(tb2, TCA_ACT_MAX, nla_data(tb[1]), |
| 1072 | nla_len(tb[1]), NULL) < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1073 | return NULL; |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 1074 | kind = tb2[TCA_ACT_KIND]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1075 | |
Thomas Graf | 26dab89 | 2006-07-05 20:45:06 -0700 | [diff] [blame] | 1076 | return kind; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1077 | } |
| 1078 | |
| 1079 | static int |
| 1080 | tc_dump_action(struct sk_buff *skb, struct netlink_callback *cb) |
| 1081 | { |
WANG Cong | ddf97cc | 2016-02-22 15:57:53 -0800 | [diff] [blame] | 1082 | struct net *net = sock_net(skb->sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1083 | struct nlmsghdr *nlh; |
Arnaldo Carvalho de Melo | 27a884d | 2007-04-19 20:29:13 -0700 | [diff] [blame] | 1084 | unsigned char *b = skb_tail_pointer(skb); |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 1085 | struct nlattr *nest; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1086 | struct tc_action_ops *a_o; |
| 1087 | struct tc_action a; |
| 1088 | int ret = 0; |
David S. Miller | 8b00a53 | 2012-06-26 21:39:32 -0700 | [diff] [blame] | 1089 | struct tcamsg *t = (struct tcamsg *) nlmsg_data(cb->nlh); |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 1090 | struct nlattr *kind = find_dump_kind(cb->nlh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1091 | |
| 1092 | if (kind == NULL) { |
stephen hemminger | 6ff9c36 | 2010-05-12 06:37:05 +0000 | [diff] [blame] | 1093 | pr_info("tc_dump_action: action bad kind\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1094 | return 0; |
| 1095 | } |
| 1096 | |
Thomas Graf | 26dab89 | 2006-07-05 20:45:06 -0700 | [diff] [blame] | 1097 | a_o = tc_lookup_action(kind); |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 1098 | if (a_o == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1099 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1100 | |
| 1101 | memset(&a, 0, sizeof(struct tc_action)); |
| 1102 | a.ops = a_o; |
| 1103 | |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 1104 | nlh = nlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, |
David S. Miller | 8b00a53 | 2012-06-26 21:39:32 -0700 | [diff] [blame] | 1105 | cb->nlh->nlmsg_type, sizeof(*t), 0); |
| 1106 | if (!nlh) |
| 1107 | goto out_module_put; |
| 1108 | t = nlmsg_data(nlh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1109 | t->tca_family = AF_UNSPEC; |
Patrick McHardy | 9ef1d4c | 2005-06-28 12:55:30 -0700 | [diff] [blame] | 1110 | t->tca__pad1 = 0; |
| 1111 | t->tca__pad2 = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1112 | |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 1113 | nest = nla_nest_start(skb, TCA_ACT_TAB); |
| 1114 | if (nest == NULL) |
David S. Miller | 8b00a53 | 2012-06-26 21:39:32 -0700 | [diff] [blame] | 1115 | goto out_module_put; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1116 | |
WANG Cong | ddf97cc | 2016-02-22 15:57:53 -0800 | [diff] [blame] | 1117 | ret = a_o->walk(net, skb, cb, RTM_GETACTION, &a); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1118 | if (ret < 0) |
David S. Miller | 8b00a53 | 2012-06-26 21:39:32 -0700 | [diff] [blame] | 1119 | goto out_module_put; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1120 | |
| 1121 | if (ret > 0) { |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 1122 | nla_nest_end(skb, nest); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1123 | ret = skb->len; |
| 1124 | } else |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 1125 | nla_nest_cancel(skb, nest); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1126 | |
Arnaldo Carvalho de Melo | 27a884d | 2007-04-19 20:29:13 -0700 | [diff] [blame] | 1127 | nlh->nlmsg_len = skb_tail_pointer(skb) - b; |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 1128 | if (NETLINK_CB(cb->skb).portid && ret) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1129 | nlh->nlmsg_flags |= NLM_F_MULTI; |
| 1130 | module_put(a_o->owner); |
| 1131 | return skb->len; |
| 1132 | |
David S. Miller | 8b00a53 | 2012-06-26 21:39:32 -0700 | [diff] [blame] | 1133 | out_module_put: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1134 | module_put(a_o->owner); |
Arnaldo Carvalho de Melo | dc5fc57 | 2007-03-25 23:06:12 -0700 | [diff] [blame] | 1135 | nlmsg_trim(skb, b); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1136 | return skb->len; |
| 1137 | } |
| 1138 | |
| 1139 | static int __init tc_action_init(void) |
| 1140 | { |
Greg Rose | c7ac867 | 2011-06-10 01:27:09 +0000 | [diff] [blame] | 1141 | rtnl_register(PF_UNSPEC, RTM_NEWACTION, tc_ctl_action, NULL, NULL); |
| 1142 | rtnl_register(PF_UNSPEC, RTM_DELACTION, tc_ctl_action, NULL, NULL); |
| 1143 | rtnl_register(PF_UNSPEC, RTM_GETACTION, tc_ctl_action, tc_dump_action, |
| 1144 | NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1145 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1146 | return 0; |
| 1147 | } |
| 1148 | |
| 1149 | subsys_initcall(tc_action_init); |