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> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | #include <linux/skbuff.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 19 | #include <linux/init.h> |
| 20 | #include <linux/kmod.h> |
Patrick McHardy | ab27cfb | 2008-01-23 20:33:13 -0800 | [diff] [blame] | 21 | #include <linux/err.h> |
Denis V. Lunev | b854272 | 2007-12-01 00:21:31 +1100 | [diff] [blame] | 22 | #include <net/net_namespace.h> |
| 23 | #include <net/sock.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | #include <net/sch_generic.h> |
| 25 | #include <net/act_api.h> |
Arnaldo Carvalho de Melo | dc5fc57 | 2007-03-25 23:06:12 -0700 | [diff] [blame] | 26 | #include <net/netlink.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 27 | |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 28 | void tcf_hash_destroy(struct tcf_common *p, struct tcf_hashinfo *hinfo) |
| 29 | { |
| 30 | unsigned int h = tcf_hash(p->tcfc_index, hinfo->hmask); |
| 31 | struct tcf_common **p1p; |
| 32 | |
| 33 | for (p1p = &hinfo->htab[h]; *p1p; p1p = &(*p1p)->tcfc_next) { |
| 34 | if (*p1p == p) { |
| 35 | write_lock_bh(hinfo->lock); |
| 36 | *p1p = p->tcfc_next; |
| 37 | write_unlock_bh(hinfo->lock); |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 38 | gen_kill_estimator(&p->tcfc_bstats, |
| 39 | &p->tcfc_rate_est); |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 40 | kfree(p); |
| 41 | return; |
| 42 | } |
| 43 | } |
| 44 | BUG_TRAP(0); |
| 45 | } |
| 46 | EXPORT_SYMBOL(tcf_hash_destroy); |
| 47 | |
| 48 | int tcf_hash_release(struct tcf_common *p, int bind, |
| 49 | struct tcf_hashinfo *hinfo) |
| 50 | { |
| 51 | int ret = 0; |
| 52 | |
| 53 | if (p) { |
| 54 | if (bind) |
| 55 | p->tcfc_bindcnt--; |
| 56 | |
| 57 | p->tcfc_refcnt--; |
YOSHIFUJI Hideaki | 10297b9 | 2007-02-09 23:25:16 +0900 | [diff] [blame] | 58 | if (p->tcfc_bindcnt <= 0 && p->tcfc_refcnt <= 0) { |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 59 | tcf_hash_destroy(p, hinfo); |
| 60 | ret = 1; |
| 61 | } |
| 62 | } |
| 63 | return ret; |
| 64 | } |
| 65 | EXPORT_SYMBOL(tcf_hash_release); |
| 66 | |
| 67 | static int tcf_dump_walker(struct sk_buff *skb, struct netlink_callback *cb, |
| 68 | struct tc_action *a, struct tcf_hashinfo *hinfo) |
| 69 | { |
| 70 | struct tcf_common *p; |
| 71 | 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] | 72 | struct nlattr *nest; |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 73 | |
Jamal Hadi Salim | e1e992e | 2007-09-12 16:32:59 +0200 | [diff] [blame] | 74 | read_lock_bh(hinfo->lock); |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 75 | |
| 76 | s_i = cb->args[0]; |
| 77 | |
| 78 | for (i = 0; i < (hinfo->hmask + 1); i++) { |
| 79 | p = hinfo->htab[tcf_hash(i, hinfo->hmask)]; |
| 80 | |
| 81 | for (; p; p = p->tcfc_next) { |
| 82 | index++; |
| 83 | if (index < s_i) |
| 84 | continue; |
| 85 | a->priv = p; |
| 86 | a->order = n_i; |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 87 | |
| 88 | nest = nla_nest_start(skb, a->order); |
| 89 | if (nest == NULL) |
| 90 | goto nla_put_failure; |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 91 | err = tcf_action_dump_1(skb, a, 0, 0); |
| 92 | if (err < 0) { |
| 93 | index--; |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 94 | nlmsg_trim(skb, nest); |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 95 | goto done; |
| 96 | } |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 97 | nla_nest_end(skb, nest); |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 98 | n_i++; |
| 99 | if (n_i >= TCA_ACT_MAX_PRIO) |
| 100 | goto done; |
| 101 | } |
| 102 | } |
| 103 | done: |
Jamal Hadi Salim | e1e992e | 2007-09-12 16:32:59 +0200 | [diff] [blame] | 104 | read_unlock_bh(hinfo->lock); |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 105 | if (n_i) |
| 106 | cb->args[0] += n_i; |
| 107 | return n_i; |
| 108 | |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 109 | nla_put_failure: |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 110 | nla_nest_cancel(skb, nest); |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 111 | goto done; |
| 112 | } |
| 113 | |
| 114 | static int tcf_del_walker(struct sk_buff *skb, struct tc_action *a, |
| 115 | struct tcf_hashinfo *hinfo) |
| 116 | { |
| 117 | struct tcf_common *p, *s_p; |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 118 | struct nlattr *nest; |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 119 | int i= 0, n_i = 0; |
| 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; |
Patrick McHardy | 57e1c48 | 2008-01-23 20:34:28 -0800 | [diff] [blame] | 124 | NLA_PUT_STRING(skb, TCA_KIND, a->ops->kind); |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 125 | for (i = 0; i < (hinfo->hmask + 1); i++) { |
| 126 | p = hinfo->htab[tcf_hash(i, hinfo->hmask)]; |
| 127 | |
| 128 | while (p != NULL) { |
| 129 | s_p = p->tcfc_next; |
| 130 | if (ACT_P_DELETED == tcf_hash_release(p, 0, hinfo)) |
| 131 | module_put(a->ops->owner); |
| 132 | n_i++; |
| 133 | p = s_p; |
| 134 | } |
| 135 | } |
Patrick McHardy | 24beeab | 2008-01-23 20:34:48 -0800 | [diff] [blame] | 136 | NLA_PUT_U32(skb, TCA_FCNT, n_i); |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 137 | nla_nest_end(skb, nest); |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 138 | |
| 139 | return n_i; |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 140 | nla_put_failure: |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 141 | nla_nest_cancel(skb, nest); |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 142 | return -EINVAL; |
| 143 | } |
| 144 | |
| 145 | int tcf_generic_walker(struct sk_buff *skb, struct netlink_callback *cb, |
| 146 | int type, struct tc_action *a) |
| 147 | { |
| 148 | struct tcf_hashinfo *hinfo = a->ops->hinfo; |
| 149 | |
| 150 | if (type == RTM_DELACTION) { |
| 151 | return tcf_del_walker(skb, a, hinfo); |
| 152 | } else if (type == RTM_GETACTION) { |
| 153 | return tcf_dump_walker(skb, cb, a, hinfo); |
| 154 | } else { |
| 155 | printk("tcf_generic_walker: unknown action %d\n", type); |
| 156 | return -EINVAL; |
| 157 | } |
| 158 | } |
| 159 | EXPORT_SYMBOL(tcf_generic_walker); |
| 160 | |
| 161 | struct tcf_common *tcf_hash_lookup(u32 index, struct tcf_hashinfo *hinfo) |
| 162 | { |
| 163 | struct tcf_common *p; |
| 164 | |
Jamal Hadi Salim | e1e992e | 2007-09-12 16:32:59 +0200 | [diff] [blame] | 165 | read_lock_bh(hinfo->lock); |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 166 | for (p = hinfo->htab[tcf_hash(index, hinfo->hmask)]; p; |
| 167 | p = p->tcfc_next) { |
| 168 | if (p->tcfc_index == index) |
| 169 | break; |
| 170 | } |
Jamal Hadi Salim | e1e992e | 2007-09-12 16:32:59 +0200 | [diff] [blame] | 171 | read_unlock_bh(hinfo->lock); |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 172 | |
| 173 | return p; |
| 174 | } |
| 175 | EXPORT_SYMBOL(tcf_hash_lookup); |
| 176 | |
| 177 | u32 tcf_hash_new_index(u32 *idx_gen, struct tcf_hashinfo *hinfo) |
| 178 | { |
| 179 | u32 val = *idx_gen; |
| 180 | |
| 181 | do { |
| 182 | if (++val == 0) |
| 183 | val = 1; |
| 184 | } while (tcf_hash_lookup(val, hinfo)); |
| 185 | |
| 186 | return (*idx_gen = val); |
| 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) { |
| 208 | if (bind) { |
| 209 | p->tcfc_bindcnt++; |
| 210 | p->tcfc_refcnt++; |
| 211 | } |
| 212 | a->priv = p; |
| 213 | } |
| 214 | return p; |
| 215 | } |
| 216 | EXPORT_SYMBOL(tcf_hash_check); |
| 217 | |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 218 | struct tcf_common *tcf_hash_create(u32 index, struct nlattr *est, struct tc_action *a, int size, int bind, u32 *idx_gen, struct tcf_hashinfo *hinfo) |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 219 | { |
| 220 | struct tcf_common *p = kzalloc(size, GFP_KERNEL); |
| 221 | |
| 222 | if (unlikely(!p)) |
| 223 | return p; |
| 224 | p->tcfc_refcnt = 1; |
| 225 | if (bind) |
| 226 | p->tcfc_bindcnt = 1; |
| 227 | |
| 228 | spin_lock_init(&p->tcfc_lock); |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 229 | p->tcfc_index = index ? index : tcf_hash_new_index(idx_gen, hinfo); |
| 230 | p->tcfc_tm.install = jiffies; |
| 231 | p->tcfc_tm.lastuse = jiffies; |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 232 | if (est) |
| 233 | gen_new_estimator(&p->tcfc_bstats, &p->tcfc_rate_est, |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 234 | &p->tcfc_lock, est); |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 235 | a->priv = (void *) p; |
| 236 | return p; |
| 237 | } |
| 238 | EXPORT_SYMBOL(tcf_hash_create); |
| 239 | |
| 240 | void tcf_hash_insert(struct tcf_common *p, struct tcf_hashinfo *hinfo) |
| 241 | { |
| 242 | unsigned int h = tcf_hash(p->tcfc_index, hinfo->hmask); |
| 243 | |
| 244 | write_lock_bh(hinfo->lock); |
| 245 | p->tcfc_next = hinfo->htab[h]; |
| 246 | hinfo->htab[h] = p; |
| 247 | write_unlock_bh(hinfo->lock); |
| 248 | } |
| 249 | EXPORT_SYMBOL(tcf_hash_insert); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 250 | |
| 251 | static struct tc_action_ops *act_base = NULL; |
| 252 | static DEFINE_RWLOCK(act_mod_lock); |
| 253 | |
| 254 | int tcf_register_action(struct tc_action_ops *act) |
| 255 | { |
| 256 | struct tc_action_ops *a, **ap; |
| 257 | |
| 258 | write_lock(&act_mod_lock); |
| 259 | for (ap = &act_base; (a = *ap) != NULL; ap = &a->next) { |
| 260 | if (act->type == a->type || (strcmp(act->kind, a->kind) == 0)) { |
| 261 | write_unlock(&act_mod_lock); |
| 262 | return -EEXIST; |
| 263 | } |
| 264 | } |
| 265 | act->next = NULL; |
| 266 | *ap = act; |
| 267 | write_unlock(&act_mod_lock); |
| 268 | return 0; |
| 269 | } |
Patrick McHardy | 62e3ba1 | 2008-01-22 22:10:23 -0800 | [diff] [blame] | 270 | EXPORT_SYMBOL(tcf_register_action); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 271 | |
| 272 | int tcf_unregister_action(struct tc_action_ops *act) |
| 273 | { |
| 274 | struct tc_action_ops *a, **ap; |
| 275 | int err = -ENOENT; |
| 276 | |
| 277 | write_lock(&act_mod_lock); |
| 278 | for (ap = &act_base; (a = *ap) != NULL; ap = &a->next) |
| 279 | if (a == act) |
| 280 | break; |
| 281 | if (a) { |
| 282 | *ap = a->next; |
| 283 | a->next = NULL; |
| 284 | err = 0; |
| 285 | } |
| 286 | write_unlock(&act_mod_lock); |
| 287 | return err; |
| 288 | } |
Patrick McHardy | 62e3ba1 | 2008-01-22 22:10:23 -0800 | [diff] [blame] | 289 | EXPORT_SYMBOL(tcf_unregister_action); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 290 | |
| 291 | /* lookup by name */ |
| 292 | static struct tc_action_ops *tc_lookup_action_n(char *kind) |
| 293 | { |
| 294 | struct tc_action_ops *a = NULL; |
| 295 | |
| 296 | if (kind) { |
| 297 | read_lock(&act_mod_lock); |
| 298 | for (a = act_base; a; a = a->next) { |
| 299 | if (strcmp(kind, a->kind) == 0) { |
| 300 | if (!try_module_get(a->owner)) { |
| 301 | read_unlock(&act_mod_lock); |
| 302 | return NULL; |
| 303 | } |
| 304 | break; |
| 305 | } |
| 306 | } |
| 307 | read_unlock(&act_mod_lock); |
| 308 | } |
| 309 | return a; |
| 310 | } |
| 311 | |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 312 | /* lookup by nlattr */ |
| 313 | static struct tc_action_ops *tc_lookup_action(struct nlattr *kind) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 314 | { |
| 315 | struct tc_action_ops *a = NULL; |
| 316 | |
| 317 | if (kind) { |
| 318 | read_lock(&act_mod_lock); |
| 319 | for (a = act_base; a; a = a->next) { |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 320 | if (nla_strcmp(kind, a->kind) == 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 321 | if (!try_module_get(a->owner)) { |
| 322 | read_unlock(&act_mod_lock); |
| 323 | return NULL; |
| 324 | } |
| 325 | break; |
| 326 | } |
| 327 | } |
| 328 | read_unlock(&act_mod_lock); |
| 329 | } |
| 330 | return a; |
| 331 | } |
| 332 | |
| 333 | #if 0 |
| 334 | /* lookup by id */ |
| 335 | static struct tc_action_ops *tc_lookup_action_id(u32 type) |
| 336 | { |
| 337 | struct tc_action_ops *a = NULL; |
| 338 | |
| 339 | if (type) { |
| 340 | read_lock(&act_mod_lock); |
| 341 | for (a = act_base; a; a = a->next) { |
| 342 | if (a->type == type) { |
| 343 | if (!try_module_get(a->owner)) { |
| 344 | read_unlock(&act_mod_lock); |
| 345 | return NULL; |
| 346 | } |
| 347 | break; |
| 348 | } |
| 349 | } |
| 350 | read_unlock(&act_mod_lock); |
| 351 | } |
| 352 | return a; |
| 353 | } |
| 354 | #endif |
| 355 | |
| 356 | int tcf_action_exec(struct sk_buff *skb, struct tc_action *act, |
YOSHIFUJI Hideaki | 10297b9 | 2007-02-09 23:25:16 +0900 | [diff] [blame] | 357 | struct tcf_result *res) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 358 | { |
| 359 | struct tc_action *a; |
| 360 | int ret = -1; |
| 361 | |
| 362 | if (skb->tc_verd & TC_NCLS) { |
| 363 | skb->tc_verd = CLR_TC_NCLS(skb->tc_verd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 364 | ret = TC_ACT_OK; |
| 365 | goto exec_done; |
| 366 | } |
| 367 | while ((a = act) != NULL) { |
| 368 | repeat: |
| 369 | if (a->ops && a->ops->act) { |
Patrick McHardy | f43c5a0 | 2006-01-08 22:15:34 -0800 | [diff] [blame] | 370 | ret = a->ops->act(skb, a, res); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 371 | if (TC_MUNGED & skb->tc_verd) { |
| 372 | /* copied already, allow trampling */ |
| 373 | skb->tc_verd = SET_TC_OK2MUNGE(skb->tc_verd); |
| 374 | skb->tc_verd = CLR_TC_MUNGED(skb->tc_verd); |
| 375 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 376 | if (ret == TC_ACT_REPEAT) |
| 377 | goto repeat; /* we need a ttl - JHS */ |
J Hadi Salim | 14d50e7 | 2005-05-03 16:29:13 -0700 | [diff] [blame] | 378 | if (ret != TC_ACT_PIPE) |
| 379 | goto exec_done; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 380 | } |
| 381 | act = a->next; |
| 382 | } |
| 383 | exec_done: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 384 | return ret; |
| 385 | } |
Patrick McHardy | 62e3ba1 | 2008-01-22 22:10:23 -0800 | [diff] [blame] | 386 | EXPORT_SYMBOL(tcf_action_exec); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 387 | |
| 388 | void tcf_action_destroy(struct tc_action *act, int bind) |
| 389 | { |
| 390 | struct tc_action *a; |
| 391 | |
| 392 | for (a = act; a; a = act) { |
| 393 | if (a->ops && a->ops->cleanup) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 394 | if (a->ops->cleanup(a, bind) == ACT_P_DELETED) |
| 395 | module_put(a->ops->owner); |
| 396 | act = act->next; |
| 397 | kfree(a); |
| 398 | } else { /*FIXME: Remove later - catch insertion bugs*/ |
| 399 | printk("tcf_action_destroy: BUG? destroying NULL ops\n"); |
| 400 | act = act->next; |
| 401 | kfree(a); |
| 402 | } |
| 403 | } |
| 404 | } |
| 405 | |
| 406 | int |
| 407 | tcf_action_dump_old(struct sk_buff *skb, struct tc_action *a, int bind, int ref) |
| 408 | { |
| 409 | int err = -EINVAL; |
| 410 | |
| 411 | if (a->ops == NULL || a->ops->dump == NULL) |
| 412 | return err; |
| 413 | return a->ops->dump(skb, a, bind, ref); |
| 414 | } |
| 415 | |
| 416 | int |
| 417 | tcf_action_dump_1(struct sk_buff *skb, struct tc_action *a, int bind, int ref) |
| 418 | { |
| 419 | int err = -EINVAL; |
Arnaldo Carvalho de Melo | 27a884d | 2007-04-19 20:29:13 -0700 | [diff] [blame] | 420 | unsigned char *b = skb_tail_pointer(skb); |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 421 | struct nlattr *nest; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 422 | |
| 423 | if (a->ops == NULL || a->ops->dump == NULL) |
| 424 | return err; |
| 425 | |
Patrick McHardy | 57e1c48 | 2008-01-23 20:34:28 -0800 | [diff] [blame] | 426 | NLA_PUT_STRING(skb, TCA_KIND, a->ops->kind); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 427 | if (tcf_action_copy_stats(skb, a, 0)) |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 428 | goto nla_put_failure; |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 429 | nest = nla_nest_start(skb, TCA_OPTIONS); |
| 430 | if (nest == NULL) |
| 431 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 432 | if ((err = tcf_action_dump_old(skb, a, bind, ref)) > 0) { |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 433 | nla_nest_end(skb, nest); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 434 | return err; |
| 435 | } |
| 436 | |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 437 | nla_put_failure: |
Arnaldo Carvalho de Melo | dc5fc57 | 2007-03-25 23:06:12 -0700 | [diff] [blame] | 438 | nlmsg_trim(skb, b); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 439 | return -1; |
| 440 | } |
Patrick McHardy | 62e3ba1 | 2008-01-22 22:10:23 -0800 | [diff] [blame] | 441 | EXPORT_SYMBOL(tcf_action_dump_1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 442 | |
| 443 | int |
| 444 | tcf_action_dump(struct sk_buff *skb, struct tc_action *act, int bind, int ref) |
| 445 | { |
| 446 | struct tc_action *a; |
| 447 | int err = -EINVAL; |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 448 | struct nlattr *nest; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 449 | |
| 450 | while ((a = act) != NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 451 | act = a->next; |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 452 | nest = nla_nest_start(skb, a->order); |
| 453 | if (nest == NULL) |
| 454 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 455 | err = tcf_action_dump_1(skb, a, bind, ref); |
| 456 | if (err < 0) |
Thomas Graf | 4fe683f | 2006-07-05 20:47:28 -0700 | [diff] [blame] | 457 | goto errout; |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 458 | nla_nest_end(skb, nest); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 459 | } |
| 460 | |
| 461 | return 0; |
| 462 | |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 463 | nla_put_failure: |
Thomas Graf | 4fe683f | 2006-07-05 20:47:28 -0700 | [diff] [blame] | 464 | err = -EINVAL; |
| 465 | errout: |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 466 | nla_nest_cancel(skb, nest); |
Thomas Graf | 4fe683f | 2006-07-05 20:47:28 -0700 | [diff] [blame] | 467 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 468 | } |
| 469 | |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 470 | struct tc_action *tcf_action_init_1(struct nlattr *nla, struct nlattr *est, |
Patrick McHardy | ab27cfb | 2008-01-23 20:33:13 -0800 | [diff] [blame] | 471 | char *name, int ovr, int bind) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 472 | { |
| 473 | struct tc_action *a; |
| 474 | struct tc_action_ops *a_o; |
| 475 | char act_name[IFNAMSIZ]; |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 476 | struct nlattr *tb[TCA_ACT_MAX+1]; |
| 477 | struct nlattr *kind; |
Patrick McHardy | ab27cfb | 2008-01-23 20:33:13 -0800 | [diff] [blame] | 478 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 479 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 480 | if (name == NULL) { |
Patrick McHardy | cee6372 | 2008-01-23 20:33:32 -0800 | [diff] [blame] | 481 | err = nla_parse_nested(tb, TCA_ACT_MAX, nla, NULL); |
| 482 | if (err < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 483 | goto err_out; |
Patrick McHardy | cee6372 | 2008-01-23 20:33:32 -0800 | [diff] [blame] | 484 | err = -EINVAL; |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 485 | kind = tb[TCA_ACT_KIND]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 486 | if (kind == NULL) |
| 487 | goto err_out; |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 488 | if (nla_strlcpy(act_name, kind, IFNAMSIZ) >= IFNAMSIZ) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 489 | goto err_out; |
| 490 | } else { |
Patrick McHardy | cee6372 | 2008-01-23 20:33:32 -0800 | [diff] [blame] | 491 | err = -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 492 | if (strlcpy(act_name, name, IFNAMSIZ) >= IFNAMSIZ) |
| 493 | goto err_out; |
| 494 | } |
| 495 | |
| 496 | a_o = tc_lookup_action_n(act_name); |
| 497 | if (a_o == NULL) { |
| 498 | #ifdef CONFIG_KMOD |
| 499 | rtnl_unlock(); |
Patrick McHardy | 4bba392 | 2006-01-08 22:22:14 -0800 | [diff] [blame] | 500 | request_module("act_%s", act_name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 501 | rtnl_lock(); |
| 502 | |
| 503 | a_o = tc_lookup_action_n(act_name); |
| 504 | |
| 505 | /* We dropped the RTNL semaphore in order to |
| 506 | * perform the module load. So, even if we |
| 507 | * succeeded in loading the module we have to |
| 508 | * tell the caller to replay the request. We |
| 509 | * indicate this using -EAGAIN. |
| 510 | */ |
| 511 | if (a_o != NULL) { |
Patrick McHardy | ab27cfb | 2008-01-23 20:33:13 -0800 | [diff] [blame] | 512 | err = -EAGAIN; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 513 | goto err_mod; |
| 514 | } |
| 515 | #endif |
Patrick McHardy | ab27cfb | 2008-01-23 20:33:13 -0800 | [diff] [blame] | 516 | err = -ENOENT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 517 | goto err_out; |
| 518 | } |
| 519 | |
Patrick McHardy | ab27cfb | 2008-01-23 20:33:13 -0800 | [diff] [blame] | 520 | err = -ENOMEM; |
Panagiotis Issaris | 0da974f | 2006-07-21 14:51:30 -0700 | [diff] [blame] | 521 | a = kzalloc(sizeof(*a), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 522 | if (a == NULL) |
| 523 | goto err_mod; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 524 | |
| 525 | /* backward compatibility for policer */ |
| 526 | if (name == NULL) |
Patrick McHardy | ab27cfb | 2008-01-23 20:33:13 -0800 | [diff] [blame] | 527 | err = a_o->init(tb[TCA_ACT_OPTIONS], est, a, ovr, bind); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 528 | else |
Patrick McHardy | ab27cfb | 2008-01-23 20:33:13 -0800 | [diff] [blame] | 529 | err = a_o->init(nla, est, a, ovr, bind); |
| 530 | if (err < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 531 | goto err_free; |
| 532 | |
| 533 | /* module count goes up only when brand new policy is created |
| 534 | if it exists and is only bound to in a_o->init() then |
| 535 | ACT_P_CREATED is not returned (a zero is). |
| 536 | */ |
Patrick McHardy | ab27cfb | 2008-01-23 20:33:13 -0800 | [diff] [blame] | 537 | if (err != ACT_P_CREATED) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 538 | module_put(a_o->owner); |
| 539 | a->ops = a_o; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 540 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 541 | return a; |
| 542 | |
| 543 | err_free: |
| 544 | kfree(a); |
| 545 | err_mod: |
| 546 | module_put(a_o->owner); |
| 547 | err_out: |
Patrick McHardy | ab27cfb | 2008-01-23 20:33:13 -0800 | [diff] [blame] | 548 | return ERR_PTR(err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 549 | } |
| 550 | |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 551 | struct tc_action *tcf_action_init(struct nlattr *nla, struct nlattr *est, |
Patrick McHardy | ab27cfb | 2008-01-23 20:33:13 -0800 | [diff] [blame] | 552 | char *name, int ovr, int bind) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 553 | { |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 554 | struct nlattr *tb[TCA_ACT_MAX_PRIO+1]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 555 | struct tc_action *head = NULL, *act, *act_prev = NULL; |
Patrick McHardy | cee6372 | 2008-01-23 20:33:32 -0800 | [diff] [blame] | 556 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 557 | int i; |
| 558 | |
Patrick McHardy | cee6372 | 2008-01-23 20:33:32 -0800 | [diff] [blame] | 559 | err = nla_parse_nested(tb, TCA_ACT_MAX_PRIO, nla, NULL); |
| 560 | if (err < 0) |
| 561 | return ERR_PTR(err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 562 | |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 563 | for (i = 1; i <= TCA_ACT_MAX_PRIO && tb[i]; i++) { |
Patrick McHardy | ab27cfb | 2008-01-23 20:33:13 -0800 | [diff] [blame] | 564 | act = tcf_action_init_1(tb[i], est, name, ovr, bind); |
| 565 | if (IS_ERR(act)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 566 | goto err; |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 567 | act->order = i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 568 | |
| 569 | if (head == NULL) |
| 570 | head = act; |
| 571 | else |
| 572 | act_prev->next = act; |
| 573 | act_prev = act; |
| 574 | } |
| 575 | return head; |
| 576 | |
| 577 | err: |
| 578 | if (head != NULL) |
| 579 | tcf_action_destroy(head, bind); |
Patrick McHardy | ab27cfb | 2008-01-23 20:33:13 -0800 | [diff] [blame] | 580 | return act; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 581 | } |
| 582 | |
| 583 | int tcf_action_copy_stats(struct sk_buff *skb, struct tc_action *a, |
| 584 | int compat_mode) |
| 585 | { |
| 586 | int err = 0; |
| 587 | struct gnet_dump d; |
| 588 | struct tcf_act_hdr *h = a->priv; |
YOSHIFUJI Hideaki | 10297b9 | 2007-02-09 23:25:16 +0900 | [diff] [blame] | 589 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 590 | if (h == NULL) |
| 591 | goto errout; |
| 592 | |
| 593 | /* compat_mode being true specifies a call that is supposed |
| 594 | * to add additional backward compatiblity statistic TLVs. |
| 595 | */ |
| 596 | if (compat_mode) { |
| 597 | if (a->type == TCA_OLD_COMPAT) |
| 598 | err = gnet_stats_start_copy_compat(skb, 0, |
Patrick McHardy | 4bdf399 | 2007-07-02 22:47:37 -0700 | [diff] [blame] | 599 | TCA_STATS, TCA_XSTATS, &h->tcf_lock, &d); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 600 | else |
| 601 | return 0; |
| 602 | } else |
| 603 | err = gnet_stats_start_copy(skb, TCA_ACT_STATS, |
Patrick McHardy | 4bdf399 | 2007-07-02 22:47:37 -0700 | [diff] [blame] | 604 | &h->tcf_lock, &d); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 605 | |
| 606 | if (err < 0) |
| 607 | goto errout; |
| 608 | |
| 609 | if (a->ops != NULL && a->ops->get_stats != NULL) |
| 610 | if (a->ops->get_stats(skb, a) < 0) |
| 611 | goto errout; |
| 612 | |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 613 | if (gnet_stats_copy_basic(&d, &h->tcf_bstats) < 0 || |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 614 | gnet_stats_copy_rate_est(&d, &h->tcf_rate_est) < 0 || |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 615 | gnet_stats_copy_queue(&d, &h->tcf_qstats) < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 616 | goto errout; |
| 617 | |
| 618 | if (gnet_stats_finish_copy(&d) < 0) |
| 619 | goto errout; |
| 620 | |
| 621 | return 0; |
| 622 | |
| 623 | errout: |
| 624 | return -1; |
| 625 | } |
| 626 | |
| 627 | static int |
| 628 | tca_get_fill(struct sk_buff *skb, struct tc_action *a, u32 pid, u32 seq, |
YOSHIFUJI Hideaki | 10297b9 | 2007-02-09 23:25:16 +0900 | [diff] [blame] | 629 | u16 flags, int event, int bind, int ref) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 630 | { |
| 631 | struct tcamsg *t; |
| 632 | struct nlmsghdr *nlh; |
Arnaldo Carvalho de Melo | 27a884d | 2007-04-19 20:29:13 -0700 | [diff] [blame] | 633 | unsigned char *b = skb_tail_pointer(skb); |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 634 | struct nlattr *nest; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 635 | |
Jamal Hadi Salim | e431b8c | 2005-06-18 22:55:31 -0700 | [diff] [blame] | 636 | nlh = NLMSG_NEW(skb, pid, seq, event, sizeof(*t), flags); |
| 637 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 638 | t = NLMSG_DATA(nlh); |
| 639 | t->tca_family = AF_UNSPEC; |
Patrick McHardy | 9ef1d4c | 2005-06-28 12:55:30 -0700 | [diff] [blame] | 640 | t->tca__pad1 = 0; |
| 641 | t->tca__pad2 = 0; |
YOSHIFUJI Hideaki | 10297b9 | 2007-02-09 23:25:16 +0900 | [diff] [blame] | 642 | |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 643 | nest = nla_nest_start(skb, TCA_ACT_TAB); |
| 644 | if (nest == NULL) |
| 645 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 646 | |
| 647 | if (tcf_action_dump(skb, a, bind, ref) < 0) |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 648 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 649 | |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 650 | nla_nest_end(skb, nest); |
YOSHIFUJI Hideaki | 10297b9 | 2007-02-09 23:25:16 +0900 | [diff] [blame] | 651 | |
Arnaldo Carvalho de Melo | 27a884d | 2007-04-19 20:29:13 -0700 | [diff] [blame] | 652 | nlh->nlmsg_len = skb_tail_pointer(skb) - b; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 653 | return skb->len; |
| 654 | |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 655 | nla_put_failure: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 656 | nlmsg_failure: |
Arnaldo Carvalho de Melo | dc5fc57 | 2007-03-25 23:06:12 -0700 | [diff] [blame] | 657 | nlmsg_trim(skb, b); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 658 | return -1; |
| 659 | } |
| 660 | |
| 661 | static int |
| 662 | act_get_notify(u32 pid, struct nlmsghdr *n, struct tc_action *a, int event) |
| 663 | { |
| 664 | struct sk_buff *skb; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 665 | |
| 666 | skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); |
| 667 | if (!skb) |
| 668 | return -ENOBUFS; |
| 669 | if (tca_get_fill(skb, a, pid, n->nlmsg_seq, 0, event, 0, 0) <= 0) { |
| 670 | kfree_skb(skb); |
| 671 | return -EINVAL; |
| 672 | } |
Thomas Graf | 2942e90 | 2006-08-15 00:30:25 -0700 | [diff] [blame] | 673 | |
Denis V. Lunev | 97c53ca | 2007-11-19 22:26:51 -0800 | [diff] [blame] | 674 | return rtnl_unicast(skb, &init_net, pid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 675 | } |
| 676 | |
| 677 | static struct tc_action * |
Patrick McHardy | ab27cfb | 2008-01-23 20:33:13 -0800 | [diff] [blame] | 678 | tcf_action_get_1(struct nlattr *nla, struct nlmsghdr *n, u32 pid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 679 | { |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 680 | struct nlattr *tb[TCA_ACT_MAX+1]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 681 | struct tc_action *a; |
| 682 | int index; |
Patrick McHardy | ab27cfb | 2008-01-23 20:33:13 -0800 | [diff] [blame] | 683 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 684 | |
Patrick McHardy | cee6372 | 2008-01-23 20:33:32 -0800 | [diff] [blame] | 685 | err = nla_parse_nested(tb, TCA_ACT_MAX, nla, NULL); |
| 686 | if (err < 0) |
Patrick McHardy | ab27cfb | 2008-01-23 20:33:13 -0800 | [diff] [blame] | 687 | goto err_out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 688 | |
Patrick McHardy | cee6372 | 2008-01-23 20:33:32 -0800 | [diff] [blame] | 689 | err = -EINVAL; |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 690 | if (tb[TCA_ACT_INDEX] == NULL || |
| 691 | nla_len(tb[TCA_ACT_INDEX]) < sizeof(index)) |
Patrick McHardy | ab27cfb | 2008-01-23 20:33:13 -0800 | [diff] [blame] | 692 | goto err_out; |
Patrick McHardy | 1587bac | 2008-01-23 20:35:03 -0800 | [diff] [blame^] | 693 | index = nla_get_u32(tb[TCA_ACT_INDEX]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 694 | |
Patrick McHardy | ab27cfb | 2008-01-23 20:33:13 -0800 | [diff] [blame] | 695 | err = -ENOMEM; |
Panagiotis Issaris | 0da974f | 2006-07-21 14:51:30 -0700 | [diff] [blame] | 696 | a = kzalloc(sizeof(struct tc_action), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 697 | if (a == NULL) |
Patrick McHardy | ab27cfb | 2008-01-23 20:33:13 -0800 | [diff] [blame] | 698 | goto err_out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 699 | |
Patrick McHardy | ab27cfb | 2008-01-23 20:33:13 -0800 | [diff] [blame] | 700 | err = -EINVAL; |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 701 | a->ops = tc_lookup_action(tb[TCA_ACT_KIND]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 702 | if (a->ops == NULL) |
| 703 | goto err_free; |
| 704 | if (a->ops->lookup == NULL) |
| 705 | goto err_mod; |
Patrick McHardy | ab27cfb | 2008-01-23 20:33:13 -0800 | [diff] [blame] | 706 | err = -ENOENT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 707 | if (a->ops->lookup(a, index) == 0) |
| 708 | goto err_mod; |
| 709 | |
| 710 | module_put(a->ops->owner); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 711 | return a; |
Patrick McHardy | ab27cfb | 2008-01-23 20:33:13 -0800 | [diff] [blame] | 712 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 713 | err_mod: |
| 714 | module_put(a->ops->owner); |
| 715 | err_free: |
| 716 | kfree(a); |
Patrick McHardy | ab27cfb | 2008-01-23 20:33:13 -0800 | [diff] [blame] | 717 | err_out: |
| 718 | return ERR_PTR(err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 719 | } |
| 720 | |
| 721 | static void cleanup_a(struct tc_action *act) |
| 722 | { |
| 723 | struct tc_action *a; |
| 724 | |
| 725 | for (a = act; a; a = act) { |
| 726 | act = a->next; |
| 727 | kfree(a); |
| 728 | } |
| 729 | } |
| 730 | |
| 731 | static struct tc_action *create_a(int i) |
| 732 | { |
| 733 | struct tc_action *act; |
| 734 | |
Panagiotis Issaris | 0da974f | 2006-07-21 14:51:30 -0700 | [diff] [blame] | 735 | act = kzalloc(sizeof(*act), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 736 | if (act == NULL) { |
| 737 | printk("create_a: failed to alloc!\n"); |
| 738 | return NULL; |
| 739 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 740 | act->order = i; |
| 741 | return act; |
| 742 | } |
| 743 | |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 744 | static int tca_action_flush(struct nlattr *nla, struct nlmsghdr *n, u32 pid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 745 | { |
| 746 | struct sk_buff *skb; |
| 747 | unsigned char *b; |
| 748 | struct nlmsghdr *nlh; |
| 749 | struct tcamsg *t; |
| 750 | struct netlink_callback dcb; |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 751 | struct nlattr *nest; |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 752 | struct nlattr *tb[TCA_ACT_MAX+1]; |
| 753 | struct nlattr *kind; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 754 | struct tc_action *a = create_a(0); |
| 755 | int err = -EINVAL; |
| 756 | |
| 757 | if (a == NULL) { |
| 758 | printk("tca_action_flush: couldnt create tc_action\n"); |
| 759 | return err; |
| 760 | } |
| 761 | |
| 762 | skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); |
| 763 | if (!skb) { |
| 764 | printk("tca_action_flush: failed skb alloc\n"); |
| 765 | kfree(a); |
| 766 | return -ENOBUFS; |
| 767 | } |
| 768 | |
Arnaldo Carvalho de Melo | 27a884d | 2007-04-19 20:29:13 -0700 | [diff] [blame] | 769 | b = skb_tail_pointer(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 770 | |
Patrick McHardy | cee6372 | 2008-01-23 20:33:32 -0800 | [diff] [blame] | 771 | err = nla_parse_nested(tb, TCA_ACT_MAX, nla, NULL); |
| 772 | if (err < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 773 | goto err_out; |
| 774 | |
Patrick McHardy | cee6372 | 2008-01-23 20:33:32 -0800 | [diff] [blame] | 775 | err = -EINVAL; |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 776 | kind = tb[TCA_ACT_KIND]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 777 | a->ops = tc_lookup_action(kind); |
| 778 | if (a->ops == NULL) |
| 779 | goto err_out; |
| 780 | |
| 781 | nlh = NLMSG_PUT(skb, pid, n->nlmsg_seq, RTM_DELACTION, sizeof(*t)); |
| 782 | t = NLMSG_DATA(nlh); |
| 783 | t->tca_family = AF_UNSPEC; |
Patrick McHardy | 9ef1d4c | 2005-06-28 12:55:30 -0700 | [diff] [blame] | 784 | t->tca__pad1 = 0; |
| 785 | t->tca__pad2 = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 786 | |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 787 | nest = nla_nest_start(skb, TCA_ACT_TAB); |
| 788 | if (nest == NULL) |
| 789 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 790 | |
| 791 | err = a->ops->walk(skb, &dcb, RTM_DELACTION, a); |
| 792 | if (err < 0) |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 793 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 794 | |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 795 | nla_nest_end(skb, nest); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 796 | |
Arnaldo Carvalho de Melo | 27a884d | 2007-04-19 20:29:13 -0700 | [diff] [blame] | 797 | nlh->nlmsg_len = skb_tail_pointer(skb) - b; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 798 | nlh->nlmsg_flags |= NLM_F_ROOT; |
| 799 | module_put(a->ops->owner); |
| 800 | kfree(a); |
Denis V. Lunev | 97c53ca | 2007-11-19 22:26:51 -0800 | [diff] [blame] | 801 | err = rtnetlink_send(skb, &init_net, pid, RTNLGRP_TC, n->nlmsg_flags&NLM_F_ECHO); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 802 | if (err > 0) |
| 803 | return 0; |
| 804 | |
| 805 | return err; |
| 806 | |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 807 | nla_put_failure: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 808 | nlmsg_failure: |
Thomas Graf | ebbaeab | 2006-07-09 11:36:23 -0700 | [diff] [blame] | 809 | module_put(a->ops->owner); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 810 | err_out: |
| 811 | kfree_skb(skb); |
| 812 | kfree(a); |
| 813 | return err; |
| 814 | } |
| 815 | |
| 816 | static int |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 817 | tca_action_gd(struct nlattr *nla, struct nlmsghdr *n, u32 pid, int event) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 818 | { |
Patrick McHardy | cee6372 | 2008-01-23 20:33:32 -0800 | [diff] [blame] | 819 | int i, ret; |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 820 | struct nlattr *tb[TCA_ACT_MAX_PRIO+1]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 821 | struct tc_action *head = NULL, *act, *act_prev = NULL; |
| 822 | |
Patrick McHardy | cee6372 | 2008-01-23 20:33:32 -0800 | [diff] [blame] | 823 | ret = nla_parse_nested(tb, TCA_ACT_MAX_PRIO, nla, NULL); |
| 824 | if (ret < 0) |
| 825 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 826 | |
| 827 | if (event == RTM_DELACTION && n->nlmsg_flags&NLM_F_ROOT) { |
| 828 | if (tb[0] != NULL && tb[1] == NULL) |
| 829 | return tca_action_flush(tb[0], n, pid); |
| 830 | } |
| 831 | |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 832 | for (i = 1; i <= TCA_ACT_MAX_PRIO && tb[i]; i++) { |
Patrick McHardy | ab27cfb | 2008-01-23 20:33:13 -0800 | [diff] [blame] | 833 | act = tcf_action_get_1(tb[i], n, pid); |
| 834 | if (IS_ERR(act)) { |
| 835 | ret = PTR_ERR(act); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 836 | goto err; |
Patrick McHardy | ab27cfb | 2008-01-23 20:33:13 -0800 | [diff] [blame] | 837 | } |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 838 | act->order = i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 839 | |
| 840 | if (head == NULL) |
| 841 | head = act; |
| 842 | else |
| 843 | act_prev->next = act; |
| 844 | act_prev = act; |
| 845 | } |
| 846 | |
| 847 | if (event == RTM_GETACTION) |
| 848 | ret = act_get_notify(pid, n, head, event); |
| 849 | else { /* delete */ |
| 850 | struct sk_buff *skb; |
| 851 | |
| 852 | skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); |
| 853 | if (!skb) { |
| 854 | ret = -ENOBUFS; |
| 855 | goto err; |
| 856 | } |
| 857 | |
| 858 | if (tca_get_fill(skb, head, pid, n->nlmsg_seq, 0, event, |
YOSHIFUJI Hideaki | 10297b9 | 2007-02-09 23:25:16 +0900 | [diff] [blame] | 859 | 0, 1) <= 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 860 | kfree_skb(skb); |
| 861 | ret = -EINVAL; |
| 862 | goto err; |
| 863 | } |
| 864 | |
| 865 | /* now do the delete */ |
| 866 | tcf_action_destroy(head, 0); |
Denis V. Lunev | 97c53ca | 2007-11-19 22:26:51 -0800 | [diff] [blame] | 867 | ret = rtnetlink_send(skb, &init_net, pid, RTNLGRP_TC, |
YOSHIFUJI Hideaki | 10297b9 | 2007-02-09 23:25:16 +0900 | [diff] [blame] | 868 | n->nlmsg_flags&NLM_F_ECHO); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 869 | if (ret > 0) |
| 870 | return 0; |
| 871 | return ret; |
| 872 | } |
| 873 | err: |
| 874 | cleanup_a(head); |
| 875 | return ret; |
| 876 | } |
| 877 | |
| 878 | static int tcf_add_notify(struct tc_action *a, u32 pid, u32 seq, int event, |
YOSHIFUJI Hideaki | 10297b9 | 2007-02-09 23:25:16 +0900 | [diff] [blame] | 879 | u16 flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 880 | { |
| 881 | struct tcamsg *t; |
| 882 | struct nlmsghdr *nlh; |
| 883 | struct sk_buff *skb; |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 884 | struct nlattr *nest; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 885 | unsigned char *b; |
| 886 | int err = 0; |
| 887 | |
| 888 | skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); |
| 889 | if (!skb) |
| 890 | return -ENOBUFS; |
| 891 | |
Arnaldo Carvalho de Melo | 27a884d | 2007-04-19 20:29:13 -0700 | [diff] [blame] | 892 | b = skb_tail_pointer(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 893 | |
Jamal Hadi Salim | e431b8c | 2005-06-18 22:55:31 -0700 | [diff] [blame] | 894 | nlh = NLMSG_NEW(skb, pid, seq, event, sizeof(*t), flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 895 | t = NLMSG_DATA(nlh); |
| 896 | t->tca_family = AF_UNSPEC; |
Patrick McHardy | 9ef1d4c | 2005-06-28 12:55:30 -0700 | [diff] [blame] | 897 | t->tca__pad1 = 0; |
| 898 | t->tca__pad2 = 0; |
| 899 | |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 900 | nest = nla_nest_start(skb, TCA_ACT_TAB); |
| 901 | if (nest == NULL) |
| 902 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 903 | |
| 904 | if (tcf_action_dump(skb, a, 0, 0) < 0) |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 905 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 906 | |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 907 | nla_nest_end(skb, nest); |
YOSHIFUJI Hideaki | 10297b9 | 2007-02-09 23:25:16 +0900 | [diff] [blame] | 908 | |
Arnaldo Carvalho de Melo | 27a884d | 2007-04-19 20:29:13 -0700 | [diff] [blame] | 909 | nlh->nlmsg_len = skb_tail_pointer(skb) - b; |
Patrick McHardy | ac6d439 | 2005-08-14 19:29:52 -0700 | [diff] [blame] | 910 | NETLINK_CB(skb).dst_group = RTNLGRP_TC; |
YOSHIFUJI Hideaki | 10297b9 | 2007-02-09 23:25:16 +0900 | [diff] [blame] | 911 | |
Denis V. Lunev | 97c53ca | 2007-11-19 22:26:51 -0800 | [diff] [blame] | 912 | err = rtnetlink_send(skb, &init_net, pid, RTNLGRP_TC, flags&NLM_F_ECHO); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 913 | if (err > 0) |
| 914 | err = 0; |
| 915 | return err; |
| 916 | |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 917 | nla_put_failure: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 918 | nlmsg_failure: |
Patrick McHardy | f6e5746 | 2006-03-12 20:33:22 -0800 | [diff] [blame] | 919 | kfree_skb(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 920 | return -1; |
| 921 | } |
| 922 | |
YOSHIFUJI Hideaki | 10297b9 | 2007-02-09 23:25:16 +0900 | [diff] [blame] | 923 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 924 | static int |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 925 | tcf_action_add(struct nlattr *nla, struct nlmsghdr *n, u32 pid, int ovr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 926 | { |
| 927 | int ret = 0; |
| 928 | struct tc_action *act; |
| 929 | struct tc_action *a; |
| 930 | u32 seq = n->nlmsg_seq; |
| 931 | |
Patrick McHardy | ab27cfb | 2008-01-23 20:33:13 -0800 | [diff] [blame] | 932 | act = tcf_action_init(nla, NULL, NULL, ovr, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 933 | if (act == NULL) |
| 934 | goto done; |
Patrick McHardy | ab27cfb | 2008-01-23 20:33:13 -0800 | [diff] [blame] | 935 | if (IS_ERR(act)) { |
| 936 | ret = PTR_ERR(act); |
| 937 | goto done; |
| 938 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 939 | |
| 940 | /* dump then free all the actions after update; inserted policy |
| 941 | * stays intact |
| 942 | * */ |
| 943 | ret = tcf_add_notify(act, pid, seq, RTM_NEWACTION, n->nlmsg_flags); |
| 944 | for (a = act; a; a = act) { |
| 945 | act = a->next; |
| 946 | kfree(a); |
| 947 | } |
| 948 | done: |
| 949 | return ret; |
| 950 | } |
| 951 | |
| 952 | static int tc_ctl_action(struct sk_buff *skb, struct nlmsghdr *n, void *arg) |
| 953 | { |
Denis V. Lunev | b854272 | 2007-12-01 00:21:31 +1100 | [diff] [blame] | 954 | struct net *net = skb->sk->sk_net; |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 955 | struct nlattr *tca[TCA_ACT_MAX + 1]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 956 | u32 pid = skb ? NETLINK_CB(skb).pid : 0; |
| 957 | int ret = 0, ovr = 0; |
| 958 | |
Denis V. Lunev | b854272 | 2007-12-01 00:21:31 +1100 | [diff] [blame] | 959 | if (net != &init_net) |
| 960 | return -EINVAL; |
| 961 | |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 962 | ret = nlmsg_parse(n, sizeof(struct tcamsg), tca, TCA_ACT_MAX, NULL); |
| 963 | if (ret < 0) |
| 964 | return ret; |
| 965 | |
| 966 | if (tca[TCA_ACT_TAB] == NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 967 | printk("tc_ctl_action: received NO action attribs\n"); |
| 968 | return -EINVAL; |
| 969 | } |
| 970 | |
| 971 | /* n->nlmsg_flags&NLM_F_CREATE |
| 972 | * */ |
| 973 | switch (n->nlmsg_type) { |
| 974 | case RTM_NEWACTION: |
| 975 | /* we are going to assume all other flags |
| 976 | * imply create only if it doesnt exist |
| 977 | * Note that CREATE | EXCL implies that |
| 978 | * but since we want avoid ambiguity (eg when flags |
| 979 | * is zero) then just set this |
| 980 | */ |
| 981 | if (n->nlmsg_flags&NLM_F_REPLACE) |
| 982 | ovr = 1; |
| 983 | replay: |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 984 | ret = tcf_action_add(tca[TCA_ACT_TAB], n, pid, ovr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 985 | if (ret == -EAGAIN) |
| 986 | goto replay; |
| 987 | break; |
| 988 | case RTM_DELACTION: |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 989 | ret = tca_action_gd(tca[TCA_ACT_TAB], n, pid, RTM_DELACTION); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 990 | break; |
| 991 | case RTM_GETACTION: |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 992 | ret = tca_action_gd(tca[TCA_ACT_TAB], n, pid, RTM_GETACTION); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 993 | break; |
| 994 | default: |
| 995 | BUG(); |
| 996 | } |
| 997 | |
| 998 | return ret; |
| 999 | } |
| 1000 | |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 1001 | static struct nlattr * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1002 | find_dump_kind(struct nlmsghdr *n) |
| 1003 | { |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 1004 | struct nlattr *tb1, *tb2[TCA_ACT_MAX+1]; |
| 1005 | struct nlattr *tb[TCA_ACT_MAX_PRIO + 1]; |
| 1006 | struct nlattr *nla[TCAA_MAX + 1]; |
| 1007 | struct nlattr *kind; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1008 | |
Patrick McHardy | c96c947 | 2008-01-23 20:32:58 -0800 | [diff] [blame] | 1009 | if (nlmsg_parse(n, sizeof(struct tcamsg), nla, TCAA_MAX, NULL) < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1010 | return NULL; |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 1011 | tb1 = nla[TCA_ACT_TAB]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1012 | if (tb1 == NULL) |
| 1013 | return NULL; |
| 1014 | |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 1015 | if (nla_parse(tb, TCA_ACT_MAX_PRIO, nla_data(tb1), |
| 1016 | NLMSG_ALIGN(nla_len(tb1)), NULL) < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1017 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1018 | |
Patrick McHardy | 6d834e0 | 2008-01-23 20:32:42 -0800 | [diff] [blame] | 1019 | if (tb[1] == NULL) |
| 1020 | return NULL; |
| 1021 | if (nla_parse(tb2, TCA_ACT_MAX, nla_data(tb[1]), |
| 1022 | nla_len(tb[1]), NULL) < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1023 | return NULL; |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 1024 | kind = tb2[TCA_ACT_KIND]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1025 | |
Thomas Graf | 26dab89 | 2006-07-05 20:45:06 -0700 | [diff] [blame] | 1026 | return kind; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1027 | } |
| 1028 | |
| 1029 | static int |
| 1030 | tc_dump_action(struct sk_buff *skb, struct netlink_callback *cb) |
| 1031 | { |
Denis V. Lunev | b854272 | 2007-12-01 00:21:31 +1100 | [diff] [blame] | 1032 | struct net *net = skb->sk->sk_net; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1033 | struct nlmsghdr *nlh; |
Arnaldo Carvalho de Melo | 27a884d | 2007-04-19 20:29:13 -0700 | [diff] [blame] | 1034 | unsigned char *b = skb_tail_pointer(skb); |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 1035 | struct nlattr *nest; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1036 | struct tc_action_ops *a_o; |
| 1037 | struct tc_action a; |
| 1038 | int ret = 0; |
| 1039 | struct tcamsg *t = (struct tcamsg *) NLMSG_DATA(cb->nlh); |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 1040 | struct nlattr *kind = find_dump_kind(cb->nlh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1041 | |
Denis V. Lunev | b854272 | 2007-12-01 00:21:31 +1100 | [diff] [blame] | 1042 | if (net != &init_net) |
| 1043 | return 0; |
| 1044 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1045 | if (kind == NULL) { |
| 1046 | printk("tc_dump_action: action bad kind\n"); |
| 1047 | return 0; |
| 1048 | } |
| 1049 | |
Thomas Graf | 26dab89 | 2006-07-05 20:45:06 -0700 | [diff] [blame] | 1050 | a_o = tc_lookup_action(kind); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1051 | if (a_o == NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1052 | return 0; |
| 1053 | } |
| 1054 | |
| 1055 | memset(&a, 0, sizeof(struct tc_action)); |
| 1056 | a.ops = a_o; |
| 1057 | |
| 1058 | if (a_o->walk == NULL) { |
Thomas Graf | 26dab89 | 2006-07-05 20:45:06 -0700 | [diff] [blame] | 1059 | printk("tc_dump_action: %s !capable of dumping table\n", a_o->kind); |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 1060 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1061 | } |
| 1062 | |
| 1063 | nlh = NLMSG_PUT(skb, NETLINK_CB(cb->skb).pid, cb->nlh->nlmsg_seq, |
YOSHIFUJI Hideaki | 10297b9 | 2007-02-09 23:25:16 +0900 | [diff] [blame] | 1064 | cb->nlh->nlmsg_type, sizeof(*t)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1065 | t = NLMSG_DATA(nlh); |
| 1066 | t->tca_family = AF_UNSPEC; |
Patrick McHardy | 9ef1d4c | 2005-06-28 12:55:30 -0700 | [diff] [blame] | 1067 | t->tca__pad1 = 0; |
| 1068 | t->tca__pad2 = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1069 | |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 1070 | nest = nla_nest_start(skb, TCA_ACT_TAB); |
| 1071 | if (nest == NULL) |
| 1072 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1073 | |
| 1074 | ret = a_o->walk(skb, cb, RTM_GETACTION, &a); |
| 1075 | if (ret < 0) |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 1076 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1077 | |
| 1078 | if (ret > 0) { |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 1079 | nla_nest_end(skb, nest); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1080 | ret = skb->len; |
| 1081 | } else |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 1082 | nla_nest_cancel(skb, nest); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1083 | |
Arnaldo Carvalho de Melo | 27a884d | 2007-04-19 20:29:13 -0700 | [diff] [blame] | 1084 | nlh->nlmsg_len = skb_tail_pointer(skb) - b; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1085 | if (NETLINK_CB(cb->skb).pid && ret) |
| 1086 | nlh->nlmsg_flags |= NLM_F_MULTI; |
| 1087 | module_put(a_o->owner); |
| 1088 | return skb->len; |
| 1089 | |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 1090 | nla_put_failure: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1091 | nlmsg_failure: |
| 1092 | module_put(a_o->owner); |
Arnaldo Carvalho de Melo | dc5fc57 | 2007-03-25 23:06:12 -0700 | [diff] [blame] | 1093 | nlmsg_trim(skb, b); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1094 | return skb->len; |
| 1095 | } |
| 1096 | |
| 1097 | static int __init tc_action_init(void) |
| 1098 | { |
Thomas Graf | 708914c | 2007-03-22 11:56:59 -0700 | [diff] [blame] | 1099 | rtnl_register(PF_UNSPEC, RTM_NEWACTION, tc_ctl_action, NULL); |
| 1100 | rtnl_register(PF_UNSPEC, RTM_DELACTION, tc_ctl_action, NULL); |
| 1101 | rtnl_register(PF_UNSPEC, RTM_GETACTION, tc_ctl_action, tc_dump_action); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1102 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1103 | return 0; |
| 1104 | } |
| 1105 | |
| 1106 | subsys_initcall(tc_action_init); |