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 | |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 30 | void tcf_hash_destroy(struct tcf_common *p, struct tcf_hashinfo *hinfo) |
| 31 | { |
WANG Cong | 89819dc | 2013-12-15 20:15:09 -0800 | [diff] [blame] | 32 | spin_lock_bh(&hinfo->lock); |
| 33 | hlist_del(&p->tcfc_head); |
| 34 | spin_unlock_bh(&hinfo->lock); |
| 35 | gen_kill_estimator(&p->tcfc_bstats, |
| 36 | &p->tcfc_rate_est); |
| 37 | /* |
| 38 | * gen_estimator est_timer() might access p->tcfc_lock |
| 39 | * or bstats, wait a RCU grace period before freeing p |
| 40 | */ |
| 41 | kfree_rcu(p, tcfc_rcu); |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 42 | } |
| 43 | EXPORT_SYMBOL(tcf_hash_destroy); |
| 44 | |
| 45 | int tcf_hash_release(struct tcf_common *p, int bind, |
| 46 | struct tcf_hashinfo *hinfo) |
| 47 | { |
| 48 | int ret = 0; |
| 49 | |
| 50 | if (p) { |
| 51 | if (bind) |
| 52 | p->tcfc_bindcnt--; |
| 53 | |
| 54 | p->tcfc_refcnt--; |
YOSHIFUJI Hideaki | 10297b9 | 2007-02-09 23:25:16 +0900 | [diff] [blame] | 55 | if (p->tcfc_bindcnt <= 0 && p->tcfc_refcnt <= 0) { |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 56 | tcf_hash_destroy(p, hinfo); |
| 57 | ret = 1; |
| 58 | } |
| 59 | } |
| 60 | return ret; |
| 61 | } |
| 62 | EXPORT_SYMBOL(tcf_hash_release); |
| 63 | |
| 64 | static int tcf_dump_walker(struct sk_buff *skb, struct netlink_callback *cb, |
| 65 | struct tc_action *a, struct tcf_hashinfo *hinfo) |
| 66 | { |
WANG Cong | 89819dc | 2013-12-15 20:15:09 -0800 | [diff] [blame] | 67 | struct hlist_head *head; |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 68 | struct tcf_common *p; |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 69 | 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] | 70 | struct nlattr *nest; |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 71 | |
WANG Cong | 89819dc | 2013-12-15 20:15:09 -0800 | [diff] [blame] | 72 | spin_lock_bh(&hinfo->lock); |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 73 | |
| 74 | s_i = cb->args[0]; |
| 75 | |
| 76 | for (i = 0; i < (hinfo->hmask + 1); i++) { |
WANG Cong | 89819dc | 2013-12-15 20:15:09 -0800 | [diff] [blame] | 77 | head = &hinfo->htab[tcf_hash(i, hinfo->hmask)]; |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 78 | |
WANG Cong | 89819dc | 2013-12-15 20:15:09 -0800 | [diff] [blame] | 79 | hlist_for_each_entry_rcu(p, head, tcfc_head) { |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 80 | index++; |
| 81 | if (index < s_i) |
| 82 | continue; |
| 83 | a->priv = p; |
| 84 | a->order = n_i; |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 85 | |
| 86 | nest = nla_nest_start(skb, a->order); |
| 87 | if (nest == NULL) |
| 88 | goto nla_put_failure; |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 89 | err = tcf_action_dump_1(skb, a, 0, 0); |
| 90 | if (err < 0) { |
| 91 | index--; |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 92 | nlmsg_trim(skb, nest); |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 93 | goto done; |
| 94 | } |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 95 | nla_nest_end(skb, nest); |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 96 | n_i++; |
| 97 | if (n_i >= TCA_ACT_MAX_PRIO) |
| 98 | goto done; |
| 99 | } |
| 100 | } |
| 101 | done: |
WANG Cong | 89819dc | 2013-12-15 20:15:09 -0800 | [diff] [blame] | 102 | spin_unlock_bh(&hinfo->lock); |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 103 | if (n_i) |
| 104 | cb->args[0] += n_i; |
| 105 | return n_i; |
| 106 | |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 107 | nla_put_failure: |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 108 | nla_nest_cancel(skb, nest); |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 109 | goto done; |
| 110 | } |
| 111 | |
| 112 | static int tcf_del_walker(struct sk_buff *skb, struct tc_action *a, |
| 113 | struct tcf_hashinfo *hinfo) |
| 114 | { |
WANG Cong | 89819dc | 2013-12-15 20:15:09 -0800 | [diff] [blame] | 115 | struct hlist_head *head; |
| 116 | struct hlist_node *n; |
| 117 | struct tcf_common *p; |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 118 | struct nlattr *nest; |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 119 | int i = 0, n_i = 0; |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 120 | |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 121 | nest = nla_nest_start(skb, a->order); |
| 122 | if (nest == NULL) |
| 123 | goto nla_put_failure; |
David S. Miller | 1b34ec4 | 2012-03-29 05:11:39 -0400 | [diff] [blame] | 124 | if (nla_put_string(skb, TCA_KIND, a->ops->kind)) |
| 125 | goto nla_put_failure; |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 126 | for (i = 0; i < (hinfo->hmask + 1); i++) { |
WANG Cong | 89819dc | 2013-12-15 20:15:09 -0800 | [diff] [blame] | 127 | head = &hinfo->htab[tcf_hash(i, hinfo->hmask)]; |
| 128 | hlist_for_each_entry_safe(p, n, head, tcfc_head) { |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 129 | if (ACT_P_DELETED == tcf_hash_release(p, 0, hinfo)) |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 130 | module_put(a->ops->owner); |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 131 | n_i++; |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 132 | } |
| 133 | } |
David S. Miller | 1b34ec4 | 2012-03-29 05:11:39 -0400 | [diff] [blame] | 134 | if (nla_put_u32(skb, TCA_FCNT, n_i)) |
| 135 | goto nla_put_failure; |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 136 | nla_nest_end(skb, nest); |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 137 | |
| 138 | return n_i; |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 139 | nla_put_failure: |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 140 | nla_nest_cancel(skb, nest); |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 141 | return -EINVAL; |
| 142 | } |
| 143 | |
| 144 | int tcf_generic_walker(struct sk_buff *skb, struct netlink_callback *cb, |
| 145 | int type, struct tc_action *a) |
| 146 | { |
| 147 | struct tcf_hashinfo *hinfo = a->ops->hinfo; |
| 148 | |
| 149 | if (type == RTM_DELACTION) { |
| 150 | return tcf_del_walker(skb, a, hinfo); |
| 151 | } else if (type == RTM_GETACTION) { |
| 152 | return tcf_dump_walker(skb, cb, a, hinfo); |
| 153 | } else { |
stephen hemminger | 6ff9c36 | 2010-05-12 06:37:05 +0000 | [diff] [blame] | 154 | WARN(1, "tcf_generic_walker: unknown action %d\n", type); |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 155 | return -EINVAL; |
| 156 | } |
| 157 | } |
| 158 | EXPORT_SYMBOL(tcf_generic_walker); |
| 159 | |
| 160 | struct tcf_common *tcf_hash_lookup(u32 index, struct tcf_hashinfo *hinfo) |
| 161 | { |
WANG Cong | 89819dc | 2013-12-15 20:15:09 -0800 | [diff] [blame] | 162 | struct tcf_common *p = NULL; |
| 163 | struct hlist_head *head; |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 164 | |
WANG Cong | 89819dc | 2013-12-15 20:15:09 -0800 | [diff] [blame] | 165 | spin_lock_bh(&hinfo->lock); |
| 166 | head = &hinfo->htab[tcf_hash(index, hinfo->hmask)]; |
| 167 | hlist_for_each_entry_rcu(p, head, tcfc_head) |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 168 | if (p->tcfc_index == index) |
| 169 | break; |
WANG Cong | 89819dc | 2013-12-15 20:15:09 -0800 | [diff] [blame] | 170 | spin_unlock_bh(&hinfo->lock); |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 171 | |
| 172 | return p; |
| 173 | } |
| 174 | EXPORT_SYMBOL(tcf_hash_lookup); |
| 175 | |
| 176 | u32 tcf_hash_new_index(u32 *idx_gen, struct tcf_hashinfo *hinfo) |
| 177 | { |
| 178 | u32 val = *idx_gen; |
| 179 | |
| 180 | do { |
| 181 | if (++val == 0) |
| 182 | val = 1; |
| 183 | } while (tcf_hash_lookup(val, hinfo)); |
| 184 | |
Yang Yingliang | 17569fa | 2013-12-10 20:55:29 +0800 | [diff] [blame] | 185 | *idx_gen = val; |
| 186 | return val; |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 187 | } |
| 188 | EXPORT_SYMBOL(tcf_hash_new_index); |
| 189 | |
| 190 | int tcf_hash_search(struct tc_action *a, u32 index) |
| 191 | { |
| 192 | struct tcf_hashinfo *hinfo = a->ops->hinfo; |
| 193 | struct tcf_common *p = tcf_hash_lookup(index, hinfo); |
| 194 | |
| 195 | if (p) { |
| 196 | a->priv = p; |
| 197 | return 1; |
| 198 | } |
| 199 | return 0; |
| 200 | } |
| 201 | EXPORT_SYMBOL(tcf_hash_search); |
| 202 | |
| 203 | struct tcf_common *tcf_hash_check(u32 index, struct tc_action *a, int bind, |
| 204 | struct tcf_hashinfo *hinfo) |
| 205 | { |
| 206 | struct tcf_common *p = NULL; |
| 207 | if (index && (p = tcf_hash_lookup(index, hinfo)) != NULL) { |
Jamal Hadi Salim | 76aab2c | 2008-08-07 20:37:22 -0700 | [diff] [blame] | 208 | if (bind) |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 209 | p->tcfc_bindcnt++; |
Jamal Hadi Salim | 76aab2c | 2008-08-07 20:37:22 -0700 | [diff] [blame] | 210 | p->tcfc_refcnt++; |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 211 | a->priv = p; |
| 212 | } |
| 213 | return p; |
| 214 | } |
| 215 | EXPORT_SYMBOL(tcf_hash_check); |
| 216 | |
Stephen Hemminger | 0e991ec | 2008-11-25 21:12:32 -0800 | [diff] [blame] | 217 | struct tcf_common *tcf_hash_create(u32 index, struct nlattr *est, |
| 218 | struct tc_action *a, int size, int bind, |
| 219 | u32 *idx_gen, struct tcf_hashinfo *hinfo) |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 220 | { |
| 221 | struct tcf_common *p = kzalloc(size, GFP_KERNEL); |
| 222 | |
| 223 | if (unlikely(!p)) |
Stephen Hemminger | 0e991ec | 2008-11-25 21:12:32 -0800 | [diff] [blame] | 224 | return ERR_PTR(-ENOMEM); |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 225 | p->tcfc_refcnt = 1; |
| 226 | if (bind) |
| 227 | p->tcfc_bindcnt = 1; |
| 228 | |
| 229 | spin_lock_init(&p->tcfc_lock); |
WANG Cong | 89819dc | 2013-12-15 20:15:09 -0800 | [diff] [blame] | 230 | INIT_HLIST_NODE(&p->tcfc_head); |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 231 | p->tcfc_index = index ? index : tcf_hash_new_index(idx_gen, hinfo); |
| 232 | p->tcfc_tm.install = jiffies; |
| 233 | p->tcfc_tm.lastuse = jiffies; |
Stephen Hemminger | 0e991ec | 2008-11-25 21:12:32 -0800 | [diff] [blame] | 234 | if (est) { |
| 235 | int err = gen_new_estimator(&p->tcfc_bstats, &p->tcfc_rate_est, |
| 236 | &p->tcfc_lock, est); |
| 237 | if (err) { |
| 238 | kfree(p); |
| 239 | return ERR_PTR(err); |
| 240 | } |
| 241 | } |
| 242 | |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 243 | a->priv = (void *) p; |
| 244 | return p; |
| 245 | } |
| 246 | EXPORT_SYMBOL(tcf_hash_create); |
| 247 | |
| 248 | void tcf_hash_insert(struct tcf_common *p, struct tcf_hashinfo *hinfo) |
| 249 | { |
| 250 | unsigned int h = tcf_hash(p->tcfc_index, hinfo->hmask); |
| 251 | |
WANG Cong | 89819dc | 2013-12-15 20:15:09 -0800 | [diff] [blame] | 252 | spin_lock_bh(&hinfo->lock); |
| 253 | hlist_add_head(&p->tcfc_head, &hinfo->htab[h]); |
| 254 | spin_unlock_bh(&hinfo->lock); |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 255 | } |
| 256 | EXPORT_SYMBOL(tcf_hash_insert); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 257 | |
WANG Cong | 1f747c2 | 2013-12-15 20:15:10 -0800 | [diff] [blame] | 258 | static LIST_HEAD(act_base); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 259 | static DEFINE_RWLOCK(act_mod_lock); |
| 260 | |
| 261 | int tcf_register_action(struct tc_action_ops *act) |
| 262 | { |
WANG Cong | 1f747c2 | 2013-12-15 20:15:10 -0800 | [diff] [blame] | 263 | struct tc_action_ops *a; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 264 | |
Jamal Hadi Salim | 76c82d7 | 2013-12-04 09:26:52 -0500 | [diff] [blame] | 265 | /* Must supply act, dump, cleanup and init */ |
| 266 | if (!act->act || !act->dump || !act->cleanup || !act->init) |
| 267 | return -EINVAL; |
| 268 | |
Jamal Hadi Salim | 382ca8a | 2013-12-04 09:26:55 -0500 | [diff] [blame] | 269 | /* Supply defaults */ |
Jamal Hadi Salim | 63ef617 | 2013-12-04 09:26:53 -0500 | [diff] [blame] | 270 | if (!act->lookup) |
| 271 | act->lookup = tcf_hash_search; |
Jamal Hadi Salim | 382ca8a | 2013-12-04 09:26:55 -0500 | [diff] [blame] | 272 | if (!act->walk) |
| 273 | act->walk = tcf_generic_walker; |
Jamal Hadi Salim | 63ef617 | 2013-12-04 09:26:53 -0500 | [diff] [blame] | 274 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 275 | write_lock(&act_mod_lock); |
WANG Cong | 1f747c2 | 2013-12-15 20:15:10 -0800 | [diff] [blame] | 276 | list_for_each_entry(a, &act_base, head) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 277 | if (act->type == a->type || (strcmp(act->kind, a->kind) == 0)) { |
| 278 | write_unlock(&act_mod_lock); |
| 279 | return -EEXIST; |
| 280 | } |
| 281 | } |
WANG Cong | 1f747c2 | 2013-12-15 20:15:10 -0800 | [diff] [blame] | 282 | list_add_tail(&act->head, &act_base); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 283 | write_unlock(&act_mod_lock); |
| 284 | return 0; |
| 285 | } |
Patrick McHardy | 62e3ba1 | 2008-01-22 22:10:23 -0800 | [diff] [blame] | 286 | EXPORT_SYMBOL(tcf_register_action); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 287 | |
| 288 | int tcf_unregister_action(struct tc_action_ops *act) |
| 289 | { |
WANG Cong | 1f747c2 | 2013-12-15 20:15:10 -0800 | [diff] [blame] | 290 | struct tc_action_ops *a; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 291 | int err = -ENOENT; |
| 292 | |
| 293 | write_lock(&act_mod_lock); |
Eric Dumazet | a792866 | 2013-12-20 12:32:32 -0800 | [diff] [blame^] | 294 | list_for_each_entry(a, &act_base, head) { |
| 295 | if (a == act) { |
| 296 | list_del(&act->head); |
| 297 | err = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 298 | break; |
Eric Dumazet | a792866 | 2013-12-20 12:32:32 -0800 | [diff] [blame^] | 299 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 300 | } |
| 301 | write_unlock(&act_mod_lock); |
| 302 | return err; |
| 303 | } |
Patrick McHardy | 62e3ba1 | 2008-01-22 22:10:23 -0800 | [diff] [blame] | 304 | EXPORT_SYMBOL(tcf_unregister_action); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 305 | |
| 306 | /* lookup by name */ |
| 307 | static struct tc_action_ops *tc_lookup_action_n(char *kind) |
| 308 | { |
Eric Dumazet | a792866 | 2013-12-20 12:32:32 -0800 | [diff] [blame^] | 309 | struct tc_action_ops *a, *res = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 310 | |
| 311 | if (kind) { |
| 312 | read_lock(&act_mod_lock); |
WANG Cong | 1f747c2 | 2013-12-15 20:15:10 -0800 | [diff] [blame] | 313 | list_for_each_entry(a, &act_base, head) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 314 | if (strcmp(kind, a->kind) == 0) { |
Eric Dumazet | a792866 | 2013-12-20 12:32:32 -0800 | [diff] [blame^] | 315 | if (try_module_get(a->owner)) |
| 316 | res = a; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 317 | break; |
| 318 | } |
| 319 | } |
| 320 | read_unlock(&act_mod_lock); |
| 321 | } |
Eric Dumazet | a792866 | 2013-12-20 12:32:32 -0800 | [diff] [blame^] | 322 | return res; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 323 | } |
| 324 | |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 325 | /* lookup by nlattr */ |
| 326 | static struct tc_action_ops *tc_lookup_action(struct nlattr *kind) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 327 | { |
Eric Dumazet | a792866 | 2013-12-20 12:32:32 -0800 | [diff] [blame^] | 328 | struct tc_action_ops *a, *res = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 329 | |
| 330 | if (kind) { |
| 331 | read_lock(&act_mod_lock); |
WANG Cong | 1f747c2 | 2013-12-15 20:15:10 -0800 | [diff] [blame] | 332 | list_for_each_entry(a, &act_base, head) { |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 333 | if (nla_strcmp(kind, a->kind) == 0) { |
Eric Dumazet | a792866 | 2013-12-20 12:32:32 -0800 | [diff] [blame^] | 334 | if (try_module_get(a->owner)) |
| 335 | res = a; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 336 | break; |
| 337 | } |
| 338 | } |
| 339 | read_unlock(&act_mod_lock); |
| 340 | } |
Eric Dumazet | a792866 | 2013-12-20 12:32:32 -0800 | [diff] [blame^] | 341 | return res; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 342 | } |
| 343 | |
WANG Cong | 33be627 | 2013-12-15 20:15:05 -0800 | [diff] [blame] | 344 | 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] | 345 | struct tcf_result *res) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 346 | { |
Eric Dumazet | dc7f9f6 | 2011-07-05 23:25:42 +0000 | [diff] [blame] | 347 | const struct tc_action *a; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 348 | int ret = -1; |
| 349 | |
| 350 | if (skb->tc_verd & TC_NCLS) { |
| 351 | skb->tc_verd = CLR_TC_NCLS(skb->tc_verd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 352 | ret = TC_ACT_OK; |
| 353 | goto exec_done; |
| 354 | } |
WANG Cong | 33be627 | 2013-12-15 20:15:05 -0800 | [diff] [blame] | 355 | list_for_each_entry(a, actions, list) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 356 | repeat: |
Jamal Hadi Salim | 76c82d7 | 2013-12-04 09:26:52 -0500 | [diff] [blame] | 357 | if (a->ops) { |
Patrick McHardy | f43c5a0 | 2006-01-08 22:15:34 -0800 | [diff] [blame] | 358 | ret = a->ops->act(skb, a, res); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 359 | if (TC_MUNGED & skb->tc_verd) { |
| 360 | /* copied already, allow trampling */ |
| 361 | skb->tc_verd = SET_TC_OK2MUNGE(skb->tc_verd); |
| 362 | skb->tc_verd = CLR_TC_MUNGED(skb->tc_verd); |
| 363 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 364 | if (ret == TC_ACT_REPEAT) |
| 365 | goto repeat; /* we need a ttl - JHS */ |
J Hadi Salim | 14d50e7 | 2005-05-03 16:29:13 -0700 | [diff] [blame] | 366 | if (ret != TC_ACT_PIPE) |
| 367 | goto exec_done; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 368 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 369 | } |
| 370 | exec_done: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 371 | return ret; |
| 372 | } |
Patrick McHardy | 62e3ba1 | 2008-01-22 22:10:23 -0800 | [diff] [blame] | 373 | EXPORT_SYMBOL(tcf_action_exec); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 374 | |
WANG Cong | 33be627 | 2013-12-15 20:15:05 -0800 | [diff] [blame] | 375 | void tcf_action_destroy(struct list_head *actions, int bind) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 376 | { |
WANG Cong | 33be627 | 2013-12-15 20:15:05 -0800 | [diff] [blame] | 377 | struct tc_action *a, *tmp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 378 | |
WANG Cong | 33be627 | 2013-12-15 20:15:05 -0800 | [diff] [blame] | 379 | list_for_each_entry_safe(a, tmp, actions, list) { |
Jamal Hadi Salim | 76c82d7 | 2013-12-04 09:26:52 -0500 | [diff] [blame] | 380 | if (a->ops) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 381 | if (a->ops->cleanup(a, bind) == ACT_P_DELETED) |
| 382 | module_put(a->ops->owner); |
WANG Cong | 33be627 | 2013-12-15 20:15:05 -0800 | [diff] [blame] | 383 | list_del(&a->list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 384 | kfree(a); |
stephen hemminger | 6ff9c36 | 2010-05-12 06:37:05 +0000 | [diff] [blame] | 385 | } else { |
| 386 | /*FIXME: Remove later - catch insertion bugs*/ |
| 387 | WARN(1, "tcf_action_destroy: BUG? destroying NULL ops\n"); |
WANG Cong | 33be627 | 2013-12-15 20:15:05 -0800 | [diff] [blame] | 388 | list_del(&a->list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 389 | kfree(a); |
| 390 | } |
| 391 | } |
| 392 | } |
| 393 | |
| 394 | int |
| 395 | tcf_action_dump_old(struct sk_buff *skb, struct tc_action *a, int bind, int ref) |
| 396 | { |
| 397 | int err = -EINVAL; |
| 398 | |
Jamal Hadi Salim | 76c82d7 | 2013-12-04 09:26:52 -0500 | [diff] [blame] | 399 | if (a->ops == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 400 | return err; |
| 401 | return a->ops->dump(skb, a, bind, ref); |
| 402 | } |
| 403 | |
| 404 | int |
| 405 | tcf_action_dump_1(struct sk_buff *skb, struct tc_action *a, int bind, int ref) |
| 406 | { |
| 407 | int err = -EINVAL; |
Arnaldo Carvalho de Melo | 27a884d | 2007-04-19 20:29:13 -0700 | [diff] [blame] | 408 | unsigned char *b = skb_tail_pointer(skb); |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 409 | struct nlattr *nest; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 410 | |
Jamal Hadi Salim | 76c82d7 | 2013-12-04 09:26:52 -0500 | [diff] [blame] | 411 | if (a->ops == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 412 | return err; |
| 413 | |
David S. Miller | 1b34ec4 | 2012-03-29 05:11:39 -0400 | [diff] [blame] | 414 | if (nla_put_string(skb, TCA_KIND, a->ops->kind)) |
| 415 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 416 | if (tcf_action_copy_stats(skb, a, 0)) |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 417 | goto nla_put_failure; |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 418 | nest = nla_nest_start(skb, TCA_OPTIONS); |
| 419 | if (nest == NULL) |
| 420 | goto nla_put_failure; |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 421 | err = tcf_action_dump_old(skb, a, bind, ref); |
| 422 | if (err > 0) { |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 423 | nla_nest_end(skb, nest); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 424 | return err; |
| 425 | } |
| 426 | |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 427 | nla_put_failure: |
Arnaldo Carvalho de Melo | dc5fc57 | 2007-03-25 23:06:12 -0700 | [diff] [blame] | 428 | nlmsg_trim(skb, b); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 429 | return -1; |
| 430 | } |
Patrick McHardy | 62e3ba1 | 2008-01-22 22:10:23 -0800 | [diff] [blame] | 431 | EXPORT_SYMBOL(tcf_action_dump_1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 432 | |
| 433 | int |
WANG Cong | 33be627 | 2013-12-15 20:15:05 -0800 | [diff] [blame] | 434 | tcf_action_dump(struct sk_buff *skb, struct list_head *actions, int bind, int ref) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 435 | { |
| 436 | struct tc_action *a; |
| 437 | int err = -EINVAL; |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 438 | struct nlattr *nest; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 439 | |
WANG Cong | 33be627 | 2013-12-15 20:15:05 -0800 | [diff] [blame] | 440 | list_for_each_entry(a, actions, list) { |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 441 | nest = nla_nest_start(skb, a->order); |
| 442 | if (nest == NULL) |
| 443 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 444 | err = tcf_action_dump_1(skb, a, bind, ref); |
| 445 | if (err < 0) |
Thomas Graf | 4fe683f | 2006-07-05 20:47:28 -0700 | [diff] [blame] | 446 | goto errout; |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 447 | nla_nest_end(skb, nest); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 448 | } |
| 449 | |
| 450 | return 0; |
| 451 | |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 452 | nla_put_failure: |
Thomas Graf | 4fe683f | 2006-07-05 20:47:28 -0700 | [diff] [blame] | 453 | err = -EINVAL; |
| 454 | errout: |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 455 | nla_nest_cancel(skb, nest); |
Thomas Graf | 4fe683f | 2006-07-05 20:47:28 -0700 | [diff] [blame] | 456 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 457 | } |
| 458 | |
Benjamin LaHaise | c1b5273 | 2013-01-14 05:15:39 +0000 | [diff] [blame] | 459 | struct tc_action *tcf_action_init_1(struct net *net, struct nlattr *nla, |
| 460 | struct nlattr *est, char *name, int ovr, |
| 461 | int bind) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 462 | { |
| 463 | struct tc_action *a; |
| 464 | struct tc_action_ops *a_o; |
| 465 | char act_name[IFNAMSIZ]; |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 466 | struct nlattr *tb[TCA_ACT_MAX + 1]; |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 467 | struct nlattr *kind; |
Patrick McHardy | ab27cfb | 2008-01-23 20:33:13 -0800 | [diff] [blame] | 468 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 469 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 470 | if (name == NULL) { |
Patrick McHardy | cee6372 | 2008-01-23 20:33:32 -0800 | [diff] [blame] | 471 | err = nla_parse_nested(tb, TCA_ACT_MAX, nla, NULL); |
| 472 | if (err < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 473 | goto err_out; |
Patrick McHardy | cee6372 | 2008-01-23 20:33:32 -0800 | [diff] [blame] | 474 | err = -EINVAL; |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 475 | kind = tb[TCA_ACT_KIND]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 476 | if (kind == NULL) |
| 477 | goto err_out; |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 478 | if (nla_strlcpy(act_name, kind, IFNAMSIZ) >= IFNAMSIZ) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 479 | goto err_out; |
| 480 | } else { |
Patrick McHardy | cee6372 | 2008-01-23 20:33:32 -0800 | [diff] [blame] | 481 | err = -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 482 | if (strlcpy(act_name, name, IFNAMSIZ) >= IFNAMSIZ) |
| 483 | goto err_out; |
| 484 | } |
| 485 | |
| 486 | a_o = tc_lookup_action_n(act_name); |
| 487 | if (a_o == NULL) { |
Johannes Berg | 95a5afc | 2008-10-16 15:24:51 -0700 | [diff] [blame] | 488 | #ifdef CONFIG_MODULES |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 489 | rtnl_unlock(); |
Patrick McHardy | 4bba392 | 2006-01-08 22:22:14 -0800 | [diff] [blame] | 490 | request_module("act_%s", act_name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 491 | rtnl_lock(); |
| 492 | |
| 493 | a_o = tc_lookup_action_n(act_name); |
| 494 | |
| 495 | /* We dropped the RTNL semaphore in order to |
| 496 | * perform the module load. So, even if we |
| 497 | * succeeded in loading the module we have to |
| 498 | * tell the caller to replay the request. We |
| 499 | * indicate this using -EAGAIN. |
| 500 | */ |
| 501 | if (a_o != NULL) { |
Patrick McHardy | ab27cfb | 2008-01-23 20:33:13 -0800 | [diff] [blame] | 502 | err = -EAGAIN; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 503 | goto err_mod; |
| 504 | } |
| 505 | #endif |
Patrick McHardy | ab27cfb | 2008-01-23 20:33:13 -0800 | [diff] [blame] | 506 | err = -ENOENT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 507 | goto err_out; |
| 508 | } |
| 509 | |
Patrick McHardy | ab27cfb | 2008-01-23 20:33:13 -0800 | [diff] [blame] | 510 | err = -ENOMEM; |
Panagiotis Issaris | 0da974f | 2006-07-21 14:51:30 -0700 | [diff] [blame] | 511 | a = kzalloc(sizeof(*a), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 512 | if (a == NULL) |
| 513 | goto err_mod; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 514 | |
WANG Cong | 33be627 | 2013-12-15 20:15:05 -0800 | [diff] [blame] | 515 | INIT_LIST_HEAD(&a->list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 516 | /* backward compatibility for policer */ |
| 517 | if (name == NULL) |
Benjamin LaHaise | c1b5273 | 2013-01-14 05:15:39 +0000 | [diff] [blame] | 518 | 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] | 519 | else |
Benjamin LaHaise | c1b5273 | 2013-01-14 05:15:39 +0000 | [diff] [blame] | 520 | err = a_o->init(net, nla, est, a, ovr, bind); |
Patrick McHardy | ab27cfb | 2008-01-23 20:33:13 -0800 | [diff] [blame] | 521 | if (err < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 522 | goto err_free; |
| 523 | |
| 524 | /* module count goes up only when brand new policy is created |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 525 | * if it exists and is only bound to in a_o->init() then |
| 526 | * ACT_P_CREATED is not returned (a zero is). |
| 527 | */ |
Patrick McHardy | ab27cfb | 2008-01-23 20:33:13 -0800 | [diff] [blame] | 528 | if (err != ACT_P_CREATED) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 529 | module_put(a_o->owner); |
| 530 | a->ops = a_o; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 531 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 532 | return a; |
| 533 | |
| 534 | err_free: |
| 535 | kfree(a); |
| 536 | err_mod: |
| 537 | module_put(a_o->owner); |
| 538 | err_out: |
Patrick McHardy | ab27cfb | 2008-01-23 20:33:13 -0800 | [diff] [blame] | 539 | return ERR_PTR(err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 540 | } |
| 541 | |
WANG Cong | 33be627 | 2013-12-15 20:15:05 -0800 | [diff] [blame] | 542 | int tcf_action_init(struct net *net, struct nlattr *nla, |
Benjamin LaHaise | c1b5273 | 2013-01-14 05:15:39 +0000 | [diff] [blame] | 543 | struct nlattr *est, char *name, int ovr, |
WANG Cong | 33be627 | 2013-12-15 20:15:05 -0800 | [diff] [blame] | 544 | int bind, struct list_head *actions) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 545 | { |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 546 | struct nlattr *tb[TCA_ACT_MAX_PRIO + 1]; |
WANG Cong | 33be627 | 2013-12-15 20:15:05 -0800 | [diff] [blame] | 547 | struct tc_action *act; |
Patrick McHardy | cee6372 | 2008-01-23 20:33:32 -0800 | [diff] [blame] | 548 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 549 | int i; |
| 550 | |
Patrick McHardy | cee6372 | 2008-01-23 20:33:32 -0800 | [diff] [blame] | 551 | err = nla_parse_nested(tb, TCA_ACT_MAX_PRIO, nla, NULL); |
| 552 | if (err < 0) |
WANG Cong | 33be627 | 2013-12-15 20:15:05 -0800 | [diff] [blame] | 553 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 554 | |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 555 | for (i = 1; i <= TCA_ACT_MAX_PRIO && tb[i]; i++) { |
Benjamin LaHaise | c1b5273 | 2013-01-14 05:15:39 +0000 | [diff] [blame] | 556 | act = tcf_action_init_1(net, tb[i], est, name, ovr, bind); |
WANG Cong | 33be627 | 2013-12-15 20:15:05 -0800 | [diff] [blame] | 557 | if (IS_ERR(act)) { |
| 558 | err = PTR_ERR(act); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 559 | goto err; |
WANG Cong | 33be627 | 2013-12-15 20:15:05 -0800 | [diff] [blame] | 560 | } |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 561 | act->order = i; |
WANG Cong | 33be627 | 2013-12-15 20:15:05 -0800 | [diff] [blame] | 562 | list_add_tail(&act->list, actions); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 563 | } |
WANG Cong | 33be627 | 2013-12-15 20:15:05 -0800 | [diff] [blame] | 564 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 565 | |
| 566 | err: |
WANG Cong | 33be627 | 2013-12-15 20:15:05 -0800 | [diff] [blame] | 567 | tcf_action_destroy(actions, bind); |
| 568 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 569 | } |
| 570 | |
| 571 | int tcf_action_copy_stats(struct sk_buff *skb, struct tc_action *a, |
| 572 | int compat_mode) |
| 573 | { |
| 574 | int err = 0; |
| 575 | struct gnet_dump d; |
| 576 | struct tcf_act_hdr *h = a->priv; |
YOSHIFUJI Hideaki | 10297b9 | 2007-02-09 23:25:16 +0900 | [diff] [blame] | 577 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 578 | if (h == NULL) |
| 579 | goto errout; |
| 580 | |
| 581 | /* compat_mode being true specifies a call that is supposed |
Dirk Hohndel | 06fe9fb | 2009-09-28 21:43:57 -0400 | [diff] [blame] | 582 | * to add additional backward compatibility statistic TLVs. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 583 | */ |
| 584 | if (compat_mode) { |
| 585 | if (a->type == TCA_OLD_COMPAT) |
| 586 | err = gnet_stats_start_copy_compat(skb, 0, |
Patrick McHardy | 4bdf399 | 2007-07-02 22:47:37 -0700 | [diff] [blame] | 587 | TCA_STATS, TCA_XSTATS, &h->tcf_lock, &d); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 588 | else |
| 589 | return 0; |
| 590 | } else |
| 591 | err = gnet_stats_start_copy(skb, TCA_ACT_STATS, |
Patrick McHardy | 4bdf399 | 2007-07-02 22:47:37 -0700 | [diff] [blame] | 592 | &h->tcf_lock, &d); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 593 | |
| 594 | if (err < 0) |
| 595 | goto errout; |
| 596 | |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 597 | if (gnet_stats_copy_basic(&d, &h->tcf_bstats) < 0 || |
Eric Dumazet | d250a5f | 2009-10-02 10:32:18 +0000 | [diff] [blame] | 598 | gnet_stats_copy_rate_est(&d, &h->tcf_bstats, |
| 599 | &h->tcf_rate_est) < 0 || |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 600 | gnet_stats_copy_queue(&d, &h->tcf_qstats) < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 601 | goto errout; |
| 602 | |
| 603 | if (gnet_stats_finish_copy(&d) < 0) |
| 604 | goto errout; |
| 605 | |
| 606 | return 0; |
| 607 | |
| 608 | errout: |
| 609 | return -1; |
| 610 | } |
| 611 | |
| 612 | static int |
WANG Cong | 33be627 | 2013-12-15 20:15:05 -0800 | [diff] [blame] | 613 | tca_get_fill(struct sk_buff *skb, struct list_head *actions, u32 portid, u32 seq, |
YOSHIFUJI Hideaki | 10297b9 | 2007-02-09 23:25:16 +0900 | [diff] [blame] | 614 | u16 flags, int event, int bind, int ref) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 615 | { |
| 616 | struct tcamsg *t; |
| 617 | struct nlmsghdr *nlh; |
Arnaldo Carvalho de Melo | 27a884d | 2007-04-19 20:29:13 -0700 | [diff] [blame] | 618 | unsigned char *b = skb_tail_pointer(skb); |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 619 | struct nlattr *nest; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 620 | |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 621 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(*t), flags); |
David S. Miller | 8b00a53 | 2012-06-26 21:39:32 -0700 | [diff] [blame] | 622 | if (!nlh) |
| 623 | goto out_nlmsg_trim; |
| 624 | t = nlmsg_data(nlh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 625 | t->tca_family = AF_UNSPEC; |
Patrick McHardy | 9ef1d4c | 2005-06-28 12:55:30 -0700 | [diff] [blame] | 626 | t->tca__pad1 = 0; |
| 627 | t->tca__pad2 = 0; |
YOSHIFUJI Hideaki | 10297b9 | 2007-02-09 23:25:16 +0900 | [diff] [blame] | 628 | |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 629 | nest = nla_nest_start(skb, TCA_ACT_TAB); |
| 630 | if (nest == NULL) |
David S. Miller | 8b00a53 | 2012-06-26 21:39:32 -0700 | [diff] [blame] | 631 | goto out_nlmsg_trim; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 632 | |
WANG Cong | 33be627 | 2013-12-15 20:15:05 -0800 | [diff] [blame] | 633 | if (tcf_action_dump(skb, actions, bind, ref) < 0) |
David S. Miller | 8b00a53 | 2012-06-26 21:39:32 -0700 | [diff] [blame] | 634 | goto out_nlmsg_trim; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 635 | |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 636 | nla_nest_end(skb, nest); |
YOSHIFUJI Hideaki | 10297b9 | 2007-02-09 23:25:16 +0900 | [diff] [blame] | 637 | |
Arnaldo Carvalho de Melo | 27a884d | 2007-04-19 20:29:13 -0700 | [diff] [blame] | 638 | nlh->nlmsg_len = skb_tail_pointer(skb) - b; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 639 | return skb->len; |
| 640 | |
David S. Miller | 8b00a53 | 2012-06-26 21:39:32 -0700 | [diff] [blame] | 641 | out_nlmsg_trim: |
Arnaldo Carvalho de Melo | dc5fc57 | 2007-03-25 23:06:12 -0700 | [diff] [blame] | 642 | nlmsg_trim(skb, b); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 643 | return -1; |
| 644 | } |
| 645 | |
| 646 | static int |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 647 | act_get_notify(struct net *net, u32 portid, struct nlmsghdr *n, |
WANG Cong | 33be627 | 2013-12-15 20:15:05 -0800 | [diff] [blame] | 648 | struct list_head *actions, int event) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 649 | { |
| 650 | struct sk_buff *skb; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 651 | |
| 652 | skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); |
| 653 | if (!skb) |
| 654 | return -ENOBUFS; |
WANG Cong | 33be627 | 2013-12-15 20:15:05 -0800 | [diff] [blame] | 655 | if (tca_get_fill(skb, actions, portid, n->nlmsg_seq, 0, event, 0, 0) <= 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 656 | kfree_skb(skb); |
| 657 | return -EINVAL; |
| 658 | } |
Thomas Graf | 2942e90 | 2006-08-15 00:30:25 -0700 | [diff] [blame] | 659 | |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 660 | return rtnl_unicast(skb, net, portid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 661 | } |
| 662 | |
| 663 | static struct tc_action * |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 664 | tcf_action_get_1(struct nlattr *nla, struct nlmsghdr *n, u32 portid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 665 | { |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 666 | struct nlattr *tb[TCA_ACT_MAX + 1]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 667 | struct tc_action *a; |
| 668 | int index; |
Patrick McHardy | ab27cfb | 2008-01-23 20:33:13 -0800 | [diff] [blame] | 669 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 670 | |
Patrick McHardy | cee6372 | 2008-01-23 20:33:32 -0800 | [diff] [blame] | 671 | err = nla_parse_nested(tb, TCA_ACT_MAX, nla, NULL); |
| 672 | if (err < 0) |
Patrick McHardy | ab27cfb | 2008-01-23 20:33:13 -0800 | [diff] [blame] | 673 | goto err_out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 674 | |
Patrick McHardy | cee6372 | 2008-01-23 20:33:32 -0800 | [diff] [blame] | 675 | err = -EINVAL; |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 676 | if (tb[TCA_ACT_INDEX] == NULL || |
| 677 | nla_len(tb[TCA_ACT_INDEX]) < sizeof(index)) |
Patrick McHardy | ab27cfb | 2008-01-23 20:33:13 -0800 | [diff] [blame] | 678 | goto err_out; |
Patrick McHardy | 1587bac | 2008-01-23 20:35:03 -0800 | [diff] [blame] | 679 | index = nla_get_u32(tb[TCA_ACT_INDEX]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 680 | |
Patrick McHardy | ab27cfb | 2008-01-23 20:33:13 -0800 | [diff] [blame] | 681 | err = -ENOMEM; |
Panagiotis Issaris | 0da974f | 2006-07-21 14:51:30 -0700 | [diff] [blame] | 682 | a = kzalloc(sizeof(struct tc_action), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 683 | if (a == NULL) |
Patrick McHardy | ab27cfb | 2008-01-23 20:33:13 -0800 | [diff] [blame] | 684 | goto err_out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 685 | |
WANG Cong | 33be627 | 2013-12-15 20:15:05 -0800 | [diff] [blame] | 686 | INIT_LIST_HEAD(&a->list); |
Patrick McHardy | ab27cfb | 2008-01-23 20:33:13 -0800 | [diff] [blame] | 687 | err = -EINVAL; |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 688 | a->ops = tc_lookup_action(tb[TCA_ACT_KIND]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 689 | if (a->ops == NULL) |
| 690 | goto err_free; |
Patrick McHardy | ab27cfb | 2008-01-23 20:33:13 -0800 | [diff] [blame] | 691 | err = -ENOENT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 692 | if (a->ops->lookup(a, index) == 0) |
| 693 | goto err_mod; |
| 694 | |
| 695 | module_put(a->ops->owner); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 696 | return a; |
Patrick McHardy | ab27cfb | 2008-01-23 20:33:13 -0800 | [diff] [blame] | 697 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 698 | err_mod: |
| 699 | module_put(a->ops->owner); |
| 700 | err_free: |
| 701 | kfree(a); |
Patrick McHardy | ab27cfb | 2008-01-23 20:33:13 -0800 | [diff] [blame] | 702 | err_out: |
| 703 | return ERR_PTR(err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 704 | } |
| 705 | |
WANG Cong | 33be627 | 2013-12-15 20:15:05 -0800 | [diff] [blame] | 706 | static void cleanup_a(struct list_head *actions) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 707 | { |
WANG Cong | 33be627 | 2013-12-15 20:15:05 -0800 | [diff] [blame] | 708 | struct tc_action *a, *tmp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 709 | |
WANG Cong | 33be627 | 2013-12-15 20:15:05 -0800 | [diff] [blame] | 710 | list_for_each_entry_safe(a, tmp, actions, list) { |
| 711 | list_del(&a->list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 712 | kfree(a); |
| 713 | } |
| 714 | } |
| 715 | |
| 716 | static struct tc_action *create_a(int i) |
| 717 | { |
| 718 | struct tc_action *act; |
| 719 | |
Panagiotis Issaris | 0da974f | 2006-07-21 14:51:30 -0700 | [diff] [blame] | 720 | act = kzalloc(sizeof(*act), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 721 | if (act == NULL) { |
stephen hemminger | 6ff9c36 | 2010-05-12 06:37:05 +0000 | [diff] [blame] | 722 | pr_debug("create_a: failed to alloc!\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 723 | return NULL; |
| 724 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 725 | act->order = i; |
WANG Cong | 33be627 | 2013-12-15 20:15:05 -0800 | [diff] [blame] | 726 | INIT_LIST_HEAD(&act->list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 727 | return act; |
| 728 | } |
| 729 | |
Tom Goff | 7316ae8 | 2010-03-19 15:40:13 +0000 | [diff] [blame] | 730 | static int tca_action_flush(struct net *net, struct nlattr *nla, |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 731 | struct nlmsghdr *n, u32 portid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 732 | { |
| 733 | struct sk_buff *skb; |
| 734 | unsigned char *b; |
| 735 | struct nlmsghdr *nlh; |
| 736 | struct tcamsg *t; |
| 737 | struct netlink_callback dcb; |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 738 | struct nlattr *nest; |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 739 | struct nlattr *tb[TCA_ACT_MAX + 1]; |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 740 | struct nlattr *kind; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 741 | struct tc_action *a = create_a(0); |
Jamal Hadi Salim | 3672387 | 2008-08-13 02:41:45 -0700 | [diff] [blame] | 742 | int err = -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 743 | |
| 744 | if (a == NULL) { |
stephen hemminger | 6ff9c36 | 2010-05-12 06:37:05 +0000 | [diff] [blame] | 745 | pr_debug("tca_action_flush: couldnt create tc_action\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 746 | return err; |
| 747 | } |
| 748 | |
| 749 | skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); |
| 750 | if (!skb) { |
stephen hemminger | 6ff9c36 | 2010-05-12 06:37:05 +0000 | [diff] [blame] | 751 | pr_debug("tca_action_flush: failed skb alloc\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 752 | kfree(a); |
Jamal Hadi Salim | 3672387 | 2008-08-13 02:41:45 -0700 | [diff] [blame] | 753 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 754 | } |
| 755 | |
Arnaldo Carvalho de Melo | 27a884d | 2007-04-19 20:29:13 -0700 | [diff] [blame] | 756 | b = skb_tail_pointer(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 757 | |
Patrick McHardy | cee6372 | 2008-01-23 20:33:32 -0800 | [diff] [blame] | 758 | err = nla_parse_nested(tb, TCA_ACT_MAX, nla, NULL); |
| 759 | if (err < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 760 | goto err_out; |
| 761 | |
Patrick McHardy | cee6372 | 2008-01-23 20:33:32 -0800 | [diff] [blame] | 762 | err = -EINVAL; |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 763 | kind = tb[TCA_ACT_KIND]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 764 | a->ops = tc_lookup_action(kind); |
| 765 | if (a->ops == NULL) |
| 766 | goto err_out; |
| 767 | |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 768 | nlh = nlmsg_put(skb, portid, n->nlmsg_seq, RTM_DELACTION, sizeof(*t), 0); |
David S. Miller | 8b00a53 | 2012-06-26 21:39:32 -0700 | [diff] [blame] | 769 | if (!nlh) |
| 770 | goto out_module_put; |
| 771 | t = nlmsg_data(nlh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 772 | t->tca_family = AF_UNSPEC; |
Patrick McHardy | 9ef1d4c | 2005-06-28 12:55:30 -0700 | [diff] [blame] | 773 | t->tca__pad1 = 0; |
| 774 | t->tca__pad2 = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 775 | |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 776 | nest = nla_nest_start(skb, TCA_ACT_TAB); |
| 777 | if (nest == NULL) |
David S. Miller | 8b00a53 | 2012-06-26 21:39:32 -0700 | [diff] [blame] | 778 | goto out_module_put; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 779 | |
| 780 | err = a->ops->walk(skb, &dcb, RTM_DELACTION, a); |
| 781 | if (err < 0) |
David S. Miller | 8b00a53 | 2012-06-26 21:39:32 -0700 | [diff] [blame] | 782 | goto out_module_put; |
Jamal Hadi Salim | f97017c | 2008-08-13 02:41:22 -0700 | [diff] [blame] | 783 | if (err == 0) |
| 784 | goto noflush_out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 785 | |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 786 | nla_nest_end(skb, nest); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 787 | |
Arnaldo Carvalho de Melo | 27a884d | 2007-04-19 20:29:13 -0700 | [diff] [blame] | 788 | nlh->nlmsg_len = skb_tail_pointer(skb) - b; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 789 | nlh->nlmsg_flags |= NLM_F_ROOT; |
| 790 | module_put(a->ops->owner); |
| 791 | kfree(a); |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 792 | err = rtnetlink_send(skb, net, portid, RTNLGRP_TC, |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 793 | n->nlmsg_flags & NLM_F_ECHO); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 794 | if (err > 0) |
| 795 | return 0; |
| 796 | |
| 797 | return err; |
| 798 | |
David S. Miller | 8b00a53 | 2012-06-26 21:39:32 -0700 | [diff] [blame] | 799 | out_module_put: |
Thomas Graf | ebbaeab | 2006-07-09 11:36:23 -0700 | [diff] [blame] | 800 | module_put(a->ops->owner); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 801 | err_out: |
Jamal Hadi Salim | f97017c | 2008-08-13 02:41:22 -0700 | [diff] [blame] | 802 | noflush_out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 803 | kfree_skb(skb); |
| 804 | kfree(a); |
| 805 | return err; |
| 806 | } |
| 807 | |
| 808 | static int |
Tom Goff | 7316ae8 | 2010-03-19 15:40:13 +0000 | [diff] [blame] | 809 | 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] | 810 | u32 portid, int event) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 811 | { |
Patrick McHardy | cee6372 | 2008-01-23 20:33:32 -0800 | [diff] [blame] | 812 | int i, ret; |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 813 | struct nlattr *tb[TCA_ACT_MAX_PRIO + 1]; |
WANG Cong | 33be627 | 2013-12-15 20:15:05 -0800 | [diff] [blame] | 814 | struct tc_action *act; |
| 815 | LIST_HEAD(actions); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 816 | |
Patrick McHardy | cee6372 | 2008-01-23 20:33:32 -0800 | [diff] [blame] | 817 | ret = nla_parse_nested(tb, TCA_ACT_MAX_PRIO, nla, NULL); |
| 818 | if (ret < 0) |
| 819 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 820 | |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 821 | if (event == RTM_DELACTION && n->nlmsg_flags & NLM_F_ROOT) { |
Jamal Hadi Salim | f97017c | 2008-08-13 02:41:22 -0700 | [diff] [blame] | 822 | if (tb[1] != NULL) |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 823 | return tca_action_flush(net, tb[1], n, portid); |
Jamal Hadi Salim | f97017c | 2008-08-13 02:41:22 -0700 | [diff] [blame] | 824 | else |
| 825 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 826 | } |
| 827 | |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 828 | for (i = 1; i <= TCA_ACT_MAX_PRIO && tb[i]; i++) { |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 829 | act = tcf_action_get_1(tb[i], n, portid); |
Patrick McHardy | ab27cfb | 2008-01-23 20:33:13 -0800 | [diff] [blame] | 830 | if (IS_ERR(act)) { |
| 831 | ret = PTR_ERR(act); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 832 | goto err; |
Patrick McHardy | ab27cfb | 2008-01-23 20:33:13 -0800 | [diff] [blame] | 833 | } |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 834 | act->order = i; |
WANG Cong | 33be627 | 2013-12-15 20:15:05 -0800 | [diff] [blame] | 835 | list_add_tail(&act->list, &actions); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 836 | } |
| 837 | |
| 838 | if (event == RTM_GETACTION) |
WANG Cong | 33be627 | 2013-12-15 20:15:05 -0800 | [diff] [blame] | 839 | ret = act_get_notify(net, portid, n, &actions, event); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 840 | else { /* delete */ |
| 841 | struct sk_buff *skb; |
| 842 | |
| 843 | skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); |
| 844 | if (!skb) { |
| 845 | ret = -ENOBUFS; |
| 846 | goto err; |
| 847 | } |
| 848 | |
WANG Cong | 33be627 | 2013-12-15 20:15:05 -0800 | [diff] [blame] | 849 | if (tca_get_fill(skb, &actions, portid, n->nlmsg_seq, 0, event, |
YOSHIFUJI Hideaki | 10297b9 | 2007-02-09 23:25:16 +0900 | [diff] [blame] | 850 | 0, 1) <= 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 851 | kfree_skb(skb); |
| 852 | ret = -EINVAL; |
| 853 | goto err; |
| 854 | } |
| 855 | |
| 856 | /* now do the delete */ |
WANG Cong | 33be627 | 2013-12-15 20:15:05 -0800 | [diff] [blame] | 857 | tcf_action_destroy(&actions, 0); |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 858 | ret = rtnetlink_send(skb, net, portid, RTNLGRP_TC, |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 859 | n->nlmsg_flags & NLM_F_ECHO); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 860 | if (ret > 0) |
| 861 | return 0; |
| 862 | return ret; |
| 863 | } |
| 864 | err: |
WANG Cong | 33be627 | 2013-12-15 20:15:05 -0800 | [diff] [blame] | 865 | cleanup_a(&actions); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 866 | return ret; |
| 867 | } |
| 868 | |
WANG Cong | 33be627 | 2013-12-15 20:15:05 -0800 | [diff] [blame] | 869 | static int tcf_add_notify(struct net *net, struct list_head *actions, |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 870 | u32 portid, u32 seq, int event, u16 flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 871 | { |
| 872 | struct tcamsg *t; |
| 873 | struct nlmsghdr *nlh; |
| 874 | struct sk_buff *skb; |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 875 | struct nlattr *nest; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 876 | unsigned char *b; |
| 877 | int err = 0; |
| 878 | |
| 879 | skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); |
| 880 | if (!skb) |
| 881 | return -ENOBUFS; |
| 882 | |
Arnaldo Carvalho de Melo | 27a884d | 2007-04-19 20:29:13 -0700 | [diff] [blame] | 883 | b = skb_tail_pointer(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 884 | |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 885 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(*t), flags); |
David S. Miller | 8b00a53 | 2012-06-26 21:39:32 -0700 | [diff] [blame] | 886 | if (!nlh) |
| 887 | goto out_kfree_skb; |
| 888 | t = nlmsg_data(nlh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 889 | t->tca_family = AF_UNSPEC; |
Patrick McHardy | 9ef1d4c | 2005-06-28 12:55:30 -0700 | [diff] [blame] | 890 | t->tca__pad1 = 0; |
| 891 | t->tca__pad2 = 0; |
| 892 | |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 893 | nest = nla_nest_start(skb, TCA_ACT_TAB); |
| 894 | if (nest == NULL) |
David S. Miller | 8b00a53 | 2012-06-26 21:39:32 -0700 | [diff] [blame] | 895 | goto out_kfree_skb; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 896 | |
WANG Cong | 33be627 | 2013-12-15 20:15:05 -0800 | [diff] [blame] | 897 | if (tcf_action_dump(skb, actions, 0, 0) < 0) |
David S. Miller | 8b00a53 | 2012-06-26 21:39:32 -0700 | [diff] [blame] | 898 | goto out_kfree_skb; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 899 | |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 900 | nla_nest_end(skb, nest); |
YOSHIFUJI Hideaki | 10297b9 | 2007-02-09 23:25:16 +0900 | [diff] [blame] | 901 | |
Arnaldo Carvalho de Melo | 27a884d | 2007-04-19 20:29:13 -0700 | [diff] [blame] | 902 | nlh->nlmsg_len = skb_tail_pointer(skb) - b; |
Patrick McHardy | ac6d439 | 2005-08-14 19:29:52 -0700 | [diff] [blame] | 903 | NETLINK_CB(skb).dst_group = RTNLGRP_TC; |
YOSHIFUJI Hideaki | 10297b9 | 2007-02-09 23:25:16 +0900 | [diff] [blame] | 904 | |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 905 | err = rtnetlink_send(skb, net, portid, RTNLGRP_TC, flags & NLM_F_ECHO); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 906 | if (err > 0) |
| 907 | err = 0; |
| 908 | return err; |
| 909 | |
David S. Miller | 8b00a53 | 2012-06-26 21:39:32 -0700 | [diff] [blame] | 910 | out_kfree_skb: |
Patrick McHardy | f6e5746 | 2006-03-12 20:33:22 -0800 | [diff] [blame] | 911 | kfree_skb(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 912 | return -1; |
| 913 | } |
| 914 | |
YOSHIFUJI Hideaki | 10297b9 | 2007-02-09 23:25:16 +0900 | [diff] [blame] | 915 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 916 | static int |
Tom Goff | 7316ae8 | 2010-03-19 15:40:13 +0000 | [diff] [blame] | 917 | 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] | 918 | u32 portid, int ovr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 919 | { |
| 920 | int ret = 0; |
WANG Cong | 33be627 | 2013-12-15 20:15:05 -0800 | [diff] [blame] | 921 | LIST_HEAD(actions); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 922 | u32 seq = n->nlmsg_seq; |
| 923 | |
WANG Cong | 33be627 | 2013-12-15 20:15:05 -0800 | [diff] [blame] | 924 | ret = tcf_action_init(net, nla, NULL, NULL, ovr, 0, &actions); |
| 925 | if (ret) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 926 | goto done; |
| 927 | |
| 928 | /* dump then free all the actions after update; inserted policy |
| 929 | * stays intact |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 930 | */ |
WANG Cong | 33be627 | 2013-12-15 20:15:05 -0800 | [diff] [blame] | 931 | ret = tcf_add_notify(net, &actions, portid, seq, RTM_NEWACTION, n->nlmsg_flags); |
| 932 | cleanup_a(&actions); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 933 | done: |
| 934 | return ret; |
| 935 | } |
| 936 | |
Thomas Graf | 661d296 | 2013-03-21 07:45:29 +0000 | [diff] [blame] | 937 | static int tc_ctl_action(struct sk_buff *skb, struct nlmsghdr *n) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 938 | { |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 939 | struct net *net = sock_net(skb->sk); |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 940 | struct nlattr *tca[TCA_ACT_MAX + 1]; |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 941 | u32 portid = skb ? NETLINK_CB(skb).portid : 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 942 | int ret = 0, ovr = 0; |
| 943 | |
Eric W. Biederman | dfc47ef | 2012-11-16 03:03:00 +0000 | [diff] [blame] | 944 | if ((n->nlmsg_type != RTM_GETACTION) && !capable(CAP_NET_ADMIN)) |
| 945 | return -EPERM; |
| 946 | |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 947 | ret = nlmsg_parse(n, sizeof(struct tcamsg), tca, TCA_ACT_MAX, NULL); |
| 948 | if (ret < 0) |
| 949 | return ret; |
| 950 | |
| 951 | if (tca[TCA_ACT_TAB] == NULL) { |
stephen hemminger | 6ff9c36 | 2010-05-12 06:37:05 +0000 | [diff] [blame] | 952 | pr_notice("tc_ctl_action: received NO action attribs\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 953 | return -EINVAL; |
| 954 | } |
| 955 | |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 956 | /* n->nlmsg_flags & NLM_F_CREATE */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 957 | switch (n->nlmsg_type) { |
| 958 | case RTM_NEWACTION: |
| 959 | /* we are going to assume all other flags |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 960 | * imply create only if it doesn't exist |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 961 | * Note that CREATE | EXCL implies that |
| 962 | * but since we want avoid ambiguity (eg when flags |
| 963 | * is zero) then just set this |
| 964 | */ |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 965 | if (n->nlmsg_flags & NLM_F_REPLACE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 966 | ovr = 1; |
| 967 | replay: |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 968 | ret = tcf_action_add(net, tca[TCA_ACT_TAB], n, portid, ovr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 969 | if (ret == -EAGAIN) |
| 970 | goto replay; |
| 971 | break; |
| 972 | case RTM_DELACTION: |
Tom Goff | 7316ae8 | 2010-03-19 15:40:13 +0000 | [diff] [blame] | 973 | ret = tca_action_gd(net, tca[TCA_ACT_TAB], n, |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 974 | portid, RTM_DELACTION); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 975 | break; |
| 976 | case RTM_GETACTION: |
Tom Goff | 7316ae8 | 2010-03-19 15:40:13 +0000 | [diff] [blame] | 977 | ret = tca_action_gd(net, tca[TCA_ACT_TAB], n, |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 978 | portid, RTM_GETACTION); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 979 | break; |
| 980 | default: |
| 981 | BUG(); |
| 982 | } |
| 983 | |
| 984 | return ret; |
| 985 | } |
| 986 | |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 987 | static struct nlattr * |
Patrick McHardy | 3a6c2b4 | 2009-08-25 16:07:40 +0200 | [diff] [blame] | 988 | find_dump_kind(const struct nlmsghdr *n) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 989 | { |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 990 | struct nlattr *tb1, *tb2[TCA_ACT_MAX + 1]; |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 991 | struct nlattr *tb[TCA_ACT_MAX_PRIO + 1]; |
| 992 | struct nlattr *nla[TCAA_MAX + 1]; |
| 993 | struct nlattr *kind; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 994 | |
Patrick McHardy | c96c947 | 2008-01-23 20:32:58 -0800 | [diff] [blame] | 995 | if (nlmsg_parse(n, sizeof(struct tcamsg), nla, TCAA_MAX, NULL) < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 996 | return NULL; |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 997 | tb1 = nla[TCA_ACT_TAB]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 998 | if (tb1 == NULL) |
| 999 | return NULL; |
| 1000 | |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 1001 | if (nla_parse(tb, TCA_ACT_MAX_PRIO, nla_data(tb1), |
| 1002 | NLMSG_ALIGN(nla_len(tb1)), NULL) < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1003 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1004 | |
Patrick McHardy | 6d834e0 | 2008-01-23 20:32:42 -0800 | [diff] [blame] | 1005 | if (tb[1] == NULL) |
| 1006 | return NULL; |
| 1007 | if (nla_parse(tb2, TCA_ACT_MAX, nla_data(tb[1]), |
| 1008 | nla_len(tb[1]), NULL) < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1009 | return NULL; |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 1010 | kind = tb2[TCA_ACT_KIND]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1011 | |
Thomas Graf | 26dab89 | 2006-07-05 20:45:06 -0700 | [diff] [blame] | 1012 | return kind; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1013 | } |
| 1014 | |
| 1015 | static int |
| 1016 | tc_dump_action(struct sk_buff *skb, struct netlink_callback *cb) |
| 1017 | { |
| 1018 | struct nlmsghdr *nlh; |
Arnaldo Carvalho de Melo | 27a884d | 2007-04-19 20:29:13 -0700 | [diff] [blame] | 1019 | unsigned char *b = skb_tail_pointer(skb); |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 1020 | struct nlattr *nest; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1021 | struct tc_action_ops *a_o; |
| 1022 | struct tc_action a; |
| 1023 | int ret = 0; |
David S. Miller | 8b00a53 | 2012-06-26 21:39:32 -0700 | [diff] [blame] | 1024 | struct tcamsg *t = (struct tcamsg *) nlmsg_data(cb->nlh); |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 1025 | struct nlattr *kind = find_dump_kind(cb->nlh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1026 | |
| 1027 | if (kind == NULL) { |
stephen hemminger | 6ff9c36 | 2010-05-12 06:37:05 +0000 | [diff] [blame] | 1028 | pr_info("tc_dump_action: action bad kind\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1029 | return 0; |
| 1030 | } |
| 1031 | |
Thomas Graf | 26dab89 | 2006-07-05 20:45:06 -0700 | [diff] [blame] | 1032 | a_o = tc_lookup_action(kind); |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 1033 | if (a_o == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1034 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1035 | |
| 1036 | memset(&a, 0, sizeof(struct tc_action)); |
| 1037 | a.ops = a_o; |
| 1038 | |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 1039 | 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] | 1040 | cb->nlh->nlmsg_type, sizeof(*t), 0); |
| 1041 | if (!nlh) |
| 1042 | goto out_module_put; |
| 1043 | t = nlmsg_data(nlh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1044 | t->tca_family = AF_UNSPEC; |
Patrick McHardy | 9ef1d4c | 2005-06-28 12:55:30 -0700 | [diff] [blame] | 1045 | t->tca__pad1 = 0; |
| 1046 | t->tca__pad2 = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1047 | |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 1048 | nest = nla_nest_start(skb, TCA_ACT_TAB); |
| 1049 | if (nest == NULL) |
David S. Miller | 8b00a53 | 2012-06-26 21:39:32 -0700 | [diff] [blame] | 1050 | goto out_module_put; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1051 | |
| 1052 | ret = a_o->walk(skb, cb, RTM_GETACTION, &a); |
| 1053 | if (ret < 0) |
David S. Miller | 8b00a53 | 2012-06-26 21:39:32 -0700 | [diff] [blame] | 1054 | goto out_module_put; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1055 | |
| 1056 | if (ret > 0) { |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 1057 | nla_nest_end(skb, nest); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1058 | ret = skb->len; |
| 1059 | } else |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 1060 | nla_nest_cancel(skb, nest); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1061 | |
Arnaldo Carvalho de Melo | 27a884d | 2007-04-19 20:29:13 -0700 | [diff] [blame] | 1062 | nlh->nlmsg_len = skb_tail_pointer(skb) - b; |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 1063 | if (NETLINK_CB(cb->skb).portid && ret) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1064 | nlh->nlmsg_flags |= NLM_F_MULTI; |
| 1065 | module_put(a_o->owner); |
| 1066 | return skb->len; |
| 1067 | |
David S. Miller | 8b00a53 | 2012-06-26 21:39:32 -0700 | [diff] [blame] | 1068 | out_module_put: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1069 | module_put(a_o->owner); |
Arnaldo Carvalho de Melo | dc5fc57 | 2007-03-25 23:06:12 -0700 | [diff] [blame] | 1070 | nlmsg_trim(skb, b); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1071 | return skb->len; |
| 1072 | } |
| 1073 | |
| 1074 | static int __init tc_action_init(void) |
| 1075 | { |
Greg Rose | c7ac867 | 2011-06-10 01:27:09 +0000 | [diff] [blame] | 1076 | rtnl_register(PF_UNSPEC, RTM_NEWACTION, tc_ctl_action, NULL, NULL); |
| 1077 | rtnl_register(PF_UNSPEC, RTM_DELACTION, tc_ctl_action, NULL, NULL); |
| 1078 | rtnl_register(PF_UNSPEC, RTM_GETACTION, tc_ctl_action, tc_dump_action, |
| 1079 | NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1080 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1081 | return 0; |
| 1082 | } |
| 1083 | |
| 1084 | subsys_initcall(tc_action_init); |