Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * net/sched/cls_api.c Packet classifier 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 | * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru> |
| 10 | * |
| 11 | * Changes: |
| 12 | * |
| 13 | * Eduardo J. Blanco <ejbs@netlabs.com.uy> :990222: kmod support |
| 14 | * |
| 15 | */ |
| 16 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | #include <linux/module.h> |
| 18 | #include <linux/types.h> |
| 19 | #include <linux/kernel.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 20 | #include <linux/string.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 21 | #include <linux/errno.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | #include <linux/skbuff.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 23 | #include <linux/init.h> |
| 24 | #include <linux/kmod.h> |
Arnaldo Carvalho de Melo | dc5fc57 | 2007-03-25 23:06:12 -0700 | [diff] [blame] | 25 | #include <linux/netlink.h> |
Patrick McHardy | ab27cfb | 2008-01-23 20:33:13 -0800 | [diff] [blame] | 26 | #include <linux/err.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 27 | #include <linux/slab.h> |
Denis V. Lunev | b854272 | 2007-12-01 00:21:31 +1100 | [diff] [blame] | 28 | #include <net/net_namespace.h> |
| 29 | #include <net/sock.h> |
Arnaldo Carvalho de Melo | dc5fc57 | 2007-03-25 23:06:12 -0700 | [diff] [blame] | 30 | #include <net/netlink.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 31 | #include <net/pkt_sched.h> |
| 32 | #include <net/pkt_cls.h> |
| 33 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 34 | /* The list of all installed classifier types */ |
| 35 | |
Patrick McHardy | 2eb9d75 | 2008-01-22 22:10:42 -0800 | [diff] [blame] | 36 | static struct tcf_proto_ops *tcf_proto_base __read_mostly; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | |
| 38 | /* Protects list of registered TC modules. It is pure SMP lock. */ |
| 39 | static DEFINE_RWLOCK(cls_mod_lock); |
| 40 | |
| 41 | /* Find classifier type by string name */ |
| 42 | |
Eric Dumazet | dc7f9f6 | 2011-07-05 23:25:42 +0000 | [diff] [blame] | 43 | static const struct tcf_proto_ops *tcf_proto_lookup_ops(struct nlattr *kind) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | { |
Eric Dumazet | dc7f9f6 | 2011-07-05 23:25:42 +0000 | [diff] [blame] | 45 | const struct tcf_proto_ops *t = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 46 | |
| 47 | if (kind) { |
| 48 | read_lock(&cls_mod_lock); |
| 49 | for (t = tcf_proto_base; t; t = t->next) { |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 50 | if (nla_strcmp(kind, t->kind) == 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | if (!try_module_get(t->owner)) |
| 52 | t = NULL; |
| 53 | break; |
| 54 | } |
| 55 | } |
| 56 | read_unlock(&cls_mod_lock); |
| 57 | } |
| 58 | return t; |
| 59 | } |
| 60 | |
| 61 | /* Register(unregister) new classifier type */ |
| 62 | |
| 63 | int register_tcf_proto_ops(struct tcf_proto_ops *ops) |
| 64 | { |
| 65 | struct tcf_proto_ops *t, **tp; |
| 66 | int rc = -EEXIST; |
| 67 | |
| 68 | write_lock(&cls_mod_lock); |
| 69 | for (tp = &tcf_proto_base; (t = *tp) != NULL; tp = &t->next) |
| 70 | if (!strcmp(ops->kind, t->kind)) |
| 71 | goto out; |
| 72 | |
| 73 | ops->next = NULL; |
| 74 | *tp = ops; |
| 75 | rc = 0; |
| 76 | out: |
| 77 | write_unlock(&cls_mod_lock); |
| 78 | return rc; |
| 79 | } |
Stephen Hemminger | aa767bf | 2008-01-21 02:26:41 -0800 | [diff] [blame] | 80 | EXPORT_SYMBOL(register_tcf_proto_ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 81 | |
| 82 | int unregister_tcf_proto_ops(struct tcf_proto_ops *ops) |
| 83 | { |
| 84 | struct tcf_proto_ops *t, **tp; |
| 85 | int rc = -ENOENT; |
| 86 | |
| 87 | write_lock(&cls_mod_lock); |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 88 | for (tp = &tcf_proto_base; (t = *tp) != NULL; tp = &t->next) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 89 | if (t == ops) |
| 90 | break; |
| 91 | |
| 92 | if (!t) |
| 93 | goto out; |
| 94 | *tp = t->next; |
| 95 | rc = 0; |
| 96 | out: |
| 97 | write_unlock(&cls_mod_lock); |
| 98 | return rc; |
| 99 | } |
Stephen Hemminger | aa767bf | 2008-01-21 02:26:41 -0800 | [diff] [blame] | 100 | EXPORT_SYMBOL(unregister_tcf_proto_ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 101 | |
Tom Goff | 7316ae8 | 2010-03-19 15:40:13 +0000 | [diff] [blame] | 102 | static int tfilter_notify(struct net *net, struct sk_buff *oskb, |
| 103 | struct nlmsghdr *n, struct tcf_proto *tp, |
| 104 | unsigned long fh, int event); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 105 | |
| 106 | |
| 107 | /* Select new prio value from the range, managed by kernel. */ |
| 108 | |
Stephen Hemminger | aa767bf | 2008-01-21 02:26:41 -0800 | [diff] [blame] | 109 | static inline u32 tcf_auto_prio(struct tcf_proto *tp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 110 | { |
Stephen Hemminger | aa767bf | 2008-01-21 02:26:41 -0800 | [diff] [blame] | 111 | u32 first = TC_H_MAKE(0xC0000000U, 0U); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 112 | |
| 113 | if (tp) |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 114 | first = tp->prio - 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 115 | |
| 116 | return first; |
| 117 | } |
| 118 | |
| 119 | /* Add/change/delete/get a filter node */ |
| 120 | |
| 121 | static int tc_ctl_tfilter(struct sk_buff *skb, struct nlmsghdr *n, void *arg) |
| 122 | { |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 123 | struct net *net = sock_net(skb->sk); |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 124 | struct nlattr *tca[TCA_MAX + 1]; |
David S. Miller | 55dbc640 | 2008-07-16 02:40:45 -0700 | [diff] [blame] | 125 | spinlock_t *root_lock; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 126 | struct tcmsg *t; |
| 127 | u32 protocol; |
| 128 | u32 prio; |
| 129 | u32 nprio; |
| 130 | u32 parent; |
| 131 | struct net_device *dev; |
| 132 | struct Qdisc *q; |
| 133 | struct tcf_proto **back, **chain; |
| 134 | struct tcf_proto *tp; |
Eric Dumazet | dc7f9f6 | 2011-07-05 23:25:42 +0000 | [diff] [blame] | 135 | const struct tcf_proto_ops *tp_ops; |
Eric Dumazet | 20fea08 | 2007-11-14 01:44:41 -0800 | [diff] [blame] | 136 | const struct Qdisc_class_ops *cops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 137 | unsigned long cl; |
| 138 | unsigned long fh; |
| 139 | int err; |
Minoru Usui | 12186be | 2009-06-02 02:17:34 -0700 | [diff] [blame] | 140 | int tp_created = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 141 | |
| 142 | replay: |
David S. Miller | 942b816 | 2012-06-26 21:48:50 -0700 | [diff] [blame] | 143 | t = nlmsg_data(n); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 144 | protocol = TC_H_MIN(t->tcm_info); |
| 145 | prio = TC_H_MAJ(t->tcm_info); |
| 146 | nprio = prio; |
| 147 | parent = t->tcm_parent; |
| 148 | cl = 0; |
| 149 | |
| 150 | if (prio == 0) { |
| 151 | /* If no priority is given, user wants we allocated it. */ |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 152 | if (n->nlmsg_type != RTM_NEWTFILTER || |
| 153 | !(n->nlmsg_flags & NLM_F_CREATE)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 154 | return -ENOENT; |
Stephen Hemminger | aa767bf | 2008-01-21 02:26:41 -0800 | [diff] [blame] | 155 | prio = TC_H_MAKE(0x80000000U, 0U); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 156 | } |
| 157 | |
| 158 | /* Find head of filter chain. */ |
| 159 | |
| 160 | /* Find link */ |
Tom Goff | 7316ae8 | 2010-03-19 15:40:13 +0000 | [diff] [blame] | 161 | dev = __dev_get_by_index(net, t->tcm_ifindex); |
Stephen Hemminger | aa767bf | 2008-01-21 02:26:41 -0800 | [diff] [blame] | 162 | if (dev == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 163 | return -ENODEV; |
| 164 | |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 165 | err = nlmsg_parse(n, sizeof(*t), tca, TCA_MAX, NULL); |
| 166 | if (err < 0) |
| 167 | return err; |
| 168 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 169 | /* Find qdisc */ |
| 170 | if (!parent) { |
Patrick McHardy | af356af | 2009-09-04 06:41:18 +0000 | [diff] [blame] | 171 | q = dev->qdisc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 172 | parent = q->handle; |
Stephen Hemminger | aa767bf | 2008-01-21 02:26:41 -0800 | [diff] [blame] | 173 | } else { |
| 174 | q = qdisc_lookup(dev, TC_H_MAJ(t->tcm_parent)); |
| 175 | if (q == NULL) |
| 176 | return -EINVAL; |
| 177 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 178 | |
| 179 | /* Is it classful? */ |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 180 | cops = q->ops->cl_ops; |
| 181 | if (!cops) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 182 | return -EINVAL; |
| 183 | |
Patrick McHardy | 71ebe5e | 2009-09-04 06:41:15 +0000 | [diff] [blame] | 184 | if (cops->tcf_chain == NULL) |
| 185 | return -EOPNOTSUPP; |
| 186 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 187 | /* Do we search for filter, attached to class? */ |
| 188 | if (TC_H_MIN(parent)) { |
| 189 | cl = cops->get(q, parent); |
| 190 | if (cl == 0) |
| 191 | return -ENOENT; |
| 192 | } |
| 193 | |
| 194 | /* And the last stroke */ |
| 195 | chain = cops->tcf_chain(q, cl); |
| 196 | err = -EINVAL; |
| 197 | if (chain == NULL) |
| 198 | goto errout; |
| 199 | |
| 200 | /* Check the chain for existence of proto-tcf with this priority */ |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 201 | for (back = chain; (tp = *back) != NULL; back = &tp->next) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 202 | if (tp->prio >= prio) { |
| 203 | if (tp->prio == prio) { |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 204 | if (!nprio || |
| 205 | (tp->protocol != protocol && protocol)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 206 | goto errout; |
| 207 | } else |
| 208 | tp = NULL; |
| 209 | break; |
| 210 | } |
| 211 | } |
| 212 | |
Jarek Poplawski | 102396a | 2008-08-29 14:21:52 -0700 | [diff] [blame] | 213 | root_lock = qdisc_root_sleeping_lock(q); |
David S. Miller | 55dbc640 | 2008-07-16 02:40:45 -0700 | [diff] [blame] | 214 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 215 | if (tp == NULL) { |
| 216 | /* Proto-tcf does not exist, create new one */ |
| 217 | |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 218 | if (tca[TCA_KIND] == NULL || !protocol) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 219 | goto errout; |
| 220 | |
| 221 | err = -ENOENT; |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 222 | if (n->nlmsg_type != RTM_NEWTFILTER || |
| 223 | !(n->nlmsg_flags & NLM_F_CREATE)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 224 | goto errout; |
| 225 | |
| 226 | |
| 227 | /* Create new proto tcf */ |
| 228 | |
| 229 | err = -ENOBUFS; |
Stephen Hemminger | aa767bf | 2008-01-21 02:26:41 -0800 | [diff] [blame] | 230 | tp = kzalloc(sizeof(*tp), GFP_KERNEL); |
| 231 | if (tp == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 232 | goto errout; |
Patrick McHardy | f2df824 | 2008-05-20 14:34:46 -0700 | [diff] [blame] | 233 | err = -ENOENT; |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 234 | tp_ops = tcf_proto_lookup_ops(tca[TCA_KIND]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 235 | if (tp_ops == NULL) { |
Johannes Berg | 95a5afc | 2008-10-16 15:24:51 -0700 | [diff] [blame] | 236 | #ifdef CONFIG_MODULES |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 237 | struct nlattr *kind = tca[TCA_KIND]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 238 | char name[IFNAMSIZ]; |
| 239 | |
| 240 | if (kind != NULL && |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 241 | nla_strlcpy(name, kind, IFNAMSIZ) < IFNAMSIZ) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 242 | rtnl_unlock(); |
| 243 | request_module("cls_%s", name); |
| 244 | rtnl_lock(); |
| 245 | tp_ops = tcf_proto_lookup_ops(kind); |
| 246 | /* We dropped the RTNL semaphore in order to |
| 247 | * perform the module load. So, even if we |
| 248 | * succeeded in loading the module we have to |
| 249 | * replay the request. We indicate this using |
| 250 | * -EAGAIN. |
| 251 | */ |
| 252 | if (tp_ops != NULL) { |
| 253 | module_put(tp_ops->owner); |
| 254 | err = -EAGAIN; |
| 255 | } |
| 256 | } |
| 257 | #endif |
| 258 | kfree(tp); |
| 259 | goto errout; |
| 260 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 261 | tp->ops = tp_ops; |
| 262 | tp->protocol = protocol; |
Robert Love | d0ab8ff | 2009-05-02 13:48:32 -0700 | [diff] [blame] | 263 | tp->prio = nprio ? : TC_H_MAJ(tcf_auto_prio(*back)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 264 | tp->q = q; |
| 265 | tp->classify = tp_ops->classify; |
| 266 | tp->classid = parent; |
Stephen Hemminger | aa767bf | 2008-01-21 02:26:41 -0800 | [diff] [blame] | 267 | |
| 268 | err = tp_ops->init(tp); |
| 269 | if (err != 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 270 | module_put(tp_ops->owner); |
| 271 | kfree(tp); |
| 272 | goto errout; |
| 273 | } |
| 274 | |
Minoru Usui | 12186be | 2009-06-02 02:17:34 -0700 | [diff] [blame] | 275 | tp_created = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 276 | |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 277 | } else if (tca[TCA_KIND] && nla_strcmp(tca[TCA_KIND], tp->ops->kind)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 278 | goto errout; |
| 279 | |
| 280 | fh = tp->ops->get(tp, t->tcm_handle); |
| 281 | |
| 282 | if (fh == 0) { |
| 283 | if (n->nlmsg_type == RTM_DELTFILTER && t->tcm_handle == 0) { |
David S. Miller | 55dbc640 | 2008-07-16 02:40:45 -0700 | [diff] [blame] | 284 | spin_lock_bh(root_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 285 | *back = tp->next; |
Jarek Poplawski | 323c048 | 2008-08-14 17:01:10 -0700 | [diff] [blame] | 286 | spin_unlock_bh(root_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 287 | |
Tom Goff | 7316ae8 | 2010-03-19 15:40:13 +0000 | [diff] [blame] | 288 | tfilter_notify(net, skb, n, tp, fh, RTM_DELTFILTER); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 289 | tcf_destroy(tp); |
| 290 | err = 0; |
| 291 | goto errout; |
| 292 | } |
| 293 | |
| 294 | err = -ENOENT; |
Stephen Hemminger | aa767bf | 2008-01-21 02:26:41 -0800 | [diff] [blame] | 295 | if (n->nlmsg_type != RTM_NEWTFILTER || |
| 296 | !(n->nlmsg_flags & NLM_F_CREATE)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 297 | goto errout; |
| 298 | } else { |
| 299 | switch (n->nlmsg_type) { |
YOSHIFUJI Hideaki | 10297b9 | 2007-02-09 23:25:16 +0900 | [diff] [blame] | 300 | case RTM_NEWTFILTER: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 301 | err = -EEXIST; |
Minoru Usui | 12186be | 2009-06-02 02:17:34 -0700 | [diff] [blame] | 302 | if (n->nlmsg_flags & NLM_F_EXCL) { |
| 303 | if (tp_created) |
| 304 | tcf_destroy(tp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 305 | goto errout; |
Minoru Usui | 12186be | 2009-06-02 02:17:34 -0700 | [diff] [blame] | 306 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 307 | break; |
| 308 | case RTM_DELTFILTER: |
| 309 | err = tp->ops->delete(tp, fh); |
| 310 | if (err == 0) |
Tom Goff | 7316ae8 | 2010-03-19 15:40:13 +0000 | [diff] [blame] | 311 | tfilter_notify(net, skb, n, tp, fh, RTM_DELTFILTER); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 312 | goto errout; |
| 313 | case RTM_GETTFILTER: |
Tom Goff | 7316ae8 | 2010-03-19 15:40:13 +0000 | [diff] [blame] | 314 | err = tfilter_notify(net, skb, n, tp, fh, RTM_NEWTFILTER); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 315 | goto errout; |
| 316 | default: |
| 317 | err = -EINVAL; |
| 318 | goto errout; |
| 319 | } |
| 320 | } |
| 321 | |
| 322 | err = tp->ops->change(tp, cl, t->tcm_handle, tca, &fh); |
Minoru Usui | 12186be | 2009-06-02 02:17:34 -0700 | [diff] [blame] | 323 | if (err == 0) { |
| 324 | if (tp_created) { |
| 325 | spin_lock_bh(root_lock); |
| 326 | tp->next = *back; |
| 327 | *back = tp; |
| 328 | spin_unlock_bh(root_lock); |
| 329 | } |
Tom Goff | 7316ae8 | 2010-03-19 15:40:13 +0000 | [diff] [blame] | 330 | tfilter_notify(net, skb, n, tp, fh, RTM_NEWTFILTER); |
Minoru Usui | 12186be | 2009-06-02 02:17:34 -0700 | [diff] [blame] | 331 | } else { |
| 332 | if (tp_created) |
| 333 | tcf_destroy(tp); |
| 334 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 335 | |
| 336 | errout: |
| 337 | if (cl) |
| 338 | cops->put(q, cl); |
| 339 | if (err == -EAGAIN) |
| 340 | /* Replay the request. */ |
| 341 | goto replay; |
| 342 | return err; |
| 343 | } |
| 344 | |
Stephen Hemminger | aa767bf | 2008-01-21 02:26:41 -0800 | [diff] [blame] | 345 | static int tcf_fill_node(struct sk_buff *skb, struct tcf_proto *tp, |
| 346 | unsigned long fh, u32 pid, u32 seq, u16 flags, int event) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 347 | { |
| 348 | struct tcmsg *tcm; |
| 349 | struct nlmsghdr *nlh; |
Arnaldo Carvalho de Melo | 27a884d | 2007-04-19 20:29:13 -0700 | [diff] [blame] | 350 | unsigned char *b = skb_tail_pointer(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 351 | |
David S. Miller | 942b816 | 2012-06-26 21:48:50 -0700 | [diff] [blame] | 352 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(*tcm), flags); |
| 353 | if (!nlh) |
| 354 | goto out_nlmsg_trim; |
| 355 | tcm = nlmsg_data(nlh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 356 | tcm->tcm_family = AF_UNSPEC; |
Patrick McHardy | 9ef1d4c | 2005-06-28 12:55:30 -0700 | [diff] [blame] | 357 | tcm->tcm__pad1 = 0; |
Jiri Pirko | ad61df9 | 2009-10-08 01:21:46 -0700 | [diff] [blame] | 358 | tcm->tcm__pad2 = 0; |
David S. Miller | 5ce2d48 | 2008-07-08 17:06:30 -0700 | [diff] [blame] | 359 | tcm->tcm_ifindex = qdisc_dev(tp->q)->ifindex; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 360 | tcm->tcm_parent = tp->classid; |
| 361 | tcm->tcm_info = TC_H_MAKE(tp->prio, tp->protocol); |
David S. Miller | 1b34ec4 | 2012-03-29 05:11:39 -0400 | [diff] [blame] | 362 | if (nla_put_string(skb, TCA_KIND, tp->ops->kind)) |
| 363 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 364 | tcm->tcm_handle = fh; |
| 365 | if (RTM_DELTFILTER != event) { |
| 366 | tcm->tcm_handle = 0; |
| 367 | if (tp->ops->dump && tp->ops->dump(tp, fh, skb, tcm) < 0) |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 368 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 369 | } |
Arnaldo Carvalho de Melo | 27a884d | 2007-04-19 20:29:13 -0700 | [diff] [blame] | 370 | nlh->nlmsg_len = skb_tail_pointer(skb) - b; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 371 | return skb->len; |
| 372 | |
David S. Miller | 942b816 | 2012-06-26 21:48:50 -0700 | [diff] [blame] | 373 | out_nlmsg_trim: |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 374 | nla_put_failure: |
Arnaldo Carvalho de Melo | dc5fc57 | 2007-03-25 23:06:12 -0700 | [diff] [blame] | 375 | nlmsg_trim(skb, b); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 376 | return -1; |
| 377 | } |
| 378 | |
Tom Goff | 7316ae8 | 2010-03-19 15:40:13 +0000 | [diff] [blame] | 379 | static int tfilter_notify(struct net *net, struct sk_buff *oskb, |
| 380 | struct nlmsghdr *n, struct tcf_proto *tp, |
| 381 | unsigned long fh, int event) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 382 | { |
| 383 | struct sk_buff *skb; |
| 384 | u32 pid = oskb ? NETLINK_CB(oskb).pid : 0; |
| 385 | |
| 386 | skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); |
| 387 | if (!skb) |
| 388 | return -ENOBUFS; |
| 389 | |
| 390 | if (tcf_fill_node(skb, tp, fh, pid, n->nlmsg_seq, 0, event) <= 0) { |
| 391 | kfree_skb(skb); |
| 392 | return -EINVAL; |
| 393 | } |
| 394 | |
Tom Goff | 7316ae8 | 2010-03-19 15:40:13 +0000 | [diff] [blame] | 395 | return rtnetlink_send(skb, net, pid, RTNLGRP_TC, |
Stephen Hemminger | aa767bf | 2008-01-21 02:26:41 -0800 | [diff] [blame] | 396 | n->nlmsg_flags & NLM_F_ECHO); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 397 | } |
| 398 | |
Stephen Hemminger | aa767bf | 2008-01-21 02:26:41 -0800 | [diff] [blame] | 399 | struct tcf_dump_args { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 400 | struct tcf_walker w; |
| 401 | struct sk_buff *skb; |
| 402 | struct netlink_callback *cb; |
| 403 | }; |
| 404 | |
Stephen Hemminger | aa767bf | 2008-01-21 02:26:41 -0800 | [diff] [blame] | 405 | static int tcf_node_dump(struct tcf_proto *tp, unsigned long n, |
| 406 | struct tcf_walker *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 407 | { |
Stephen Hemminger | aa767bf | 2008-01-21 02:26:41 -0800 | [diff] [blame] | 408 | struct tcf_dump_args *a = (void *)arg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 409 | |
| 410 | return tcf_fill_node(a->skb, tp, n, NETLINK_CB(a->cb->skb).pid, |
| 411 | a->cb->nlh->nlmsg_seq, NLM_F_MULTI, RTM_NEWTFILTER); |
| 412 | } |
| 413 | |
Eric Dumazet | bd27a87 | 2009-11-05 20:57:26 -0800 | [diff] [blame] | 414 | /* called with RTNL */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 415 | static int tc_dump_tfilter(struct sk_buff *skb, struct netlink_callback *cb) |
| 416 | { |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 417 | struct net *net = sock_net(skb->sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 418 | int t; |
| 419 | int s_t; |
| 420 | struct net_device *dev; |
| 421 | struct Qdisc *q; |
| 422 | struct tcf_proto *tp, **chain; |
David S. Miller | 942b816 | 2012-06-26 21:48:50 -0700 | [diff] [blame] | 423 | struct tcmsg *tcm = nlmsg_data(cb->nlh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 424 | unsigned long cl = 0; |
Eric Dumazet | 20fea08 | 2007-11-14 01:44:41 -0800 | [diff] [blame] | 425 | const struct Qdisc_class_ops *cops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 426 | struct tcf_dump_args arg; |
| 427 | |
| 428 | if (cb->nlh->nlmsg_len < NLMSG_LENGTH(sizeof(*tcm))) |
| 429 | return skb->len; |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 430 | dev = __dev_get_by_index(net, tcm->tcm_ifindex); |
| 431 | if (!dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 432 | return skb->len; |
| 433 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 434 | if (!tcm->tcm_parent) |
Patrick McHardy | af356af | 2009-09-04 06:41:18 +0000 | [diff] [blame] | 435 | q = dev->qdisc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 436 | else |
| 437 | q = qdisc_lookup(dev, TC_H_MAJ(tcm->tcm_parent)); |
| 438 | if (!q) |
| 439 | goto out; |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 440 | cops = q->ops->cl_ops; |
| 441 | if (!cops) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 442 | goto errout; |
Patrick McHardy | 71ebe5e | 2009-09-04 06:41:15 +0000 | [diff] [blame] | 443 | if (cops->tcf_chain == NULL) |
| 444 | goto errout; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 445 | if (TC_H_MIN(tcm->tcm_parent)) { |
| 446 | cl = cops->get(q, tcm->tcm_parent); |
| 447 | if (cl == 0) |
| 448 | goto errout; |
| 449 | } |
| 450 | chain = cops->tcf_chain(q, cl); |
| 451 | if (chain == NULL) |
| 452 | goto errout; |
| 453 | |
| 454 | s_t = cb->args[0]; |
| 455 | |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 456 | for (tp = *chain, t = 0; tp; tp = tp->next, t++) { |
| 457 | if (t < s_t) |
| 458 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 459 | if (TC_H_MAJ(tcm->tcm_info) && |
| 460 | TC_H_MAJ(tcm->tcm_info) != tp->prio) |
| 461 | continue; |
| 462 | if (TC_H_MIN(tcm->tcm_info) && |
| 463 | TC_H_MIN(tcm->tcm_info) != tp->protocol) |
| 464 | continue; |
| 465 | if (t > s_t) |
| 466 | memset(&cb->args[1], 0, sizeof(cb->args)-sizeof(cb->args[0])); |
| 467 | if (cb->args[1] == 0) { |
| 468 | if (tcf_fill_node(skb, tp, 0, NETLINK_CB(cb->skb).pid, |
Stephen Hemminger | aa767bf | 2008-01-21 02:26:41 -0800 | [diff] [blame] | 469 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
| 470 | RTM_NEWTFILTER) <= 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 471 | break; |
Stephen Hemminger | aa767bf | 2008-01-21 02:26:41 -0800 | [diff] [blame] | 472 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 473 | cb->args[1] = 1; |
| 474 | } |
| 475 | if (tp->ops->walk == NULL) |
| 476 | continue; |
| 477 | arg.w.fn = tcf_node_dump; |
| 478 | arg.skb = skb; |
| 479 | arg.cb = cb; |
| 480 | arg.w.stop = 0; |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 481 | arg.w.skip = cb->args[1] - 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 482 | arg.w.count = 0; |
| 483 | tp->ops->walk(tp, &arg.w); |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 484 | cb->args[1] = arg.w.count + 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 485 | if (arg.w.stop) |
| 486 | break; |
| 487 | } |
| 488 | |
| 489 | cb->args[0] = t; |
| 490 | |
| 491 | errout: |
| 492 | if (cl) |
| 493 | cops->put(q, cl); |
| 494 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 495 | return skb->len; |
| 496 | } |
| 497 | |
Stephen Hemminger | aa767bf | 2008-01-21 02:26:41 -0800 | [diff] [blame] | 498 | void tcf_exts_destroy(struct tcf_proto *tp, struct tcf_exts *exts) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 499 | { |
| 500 | #ifdef CONFIG_NET_CLS_ACT |
| 501 | if (exts->action) { |
| 502 | tcf_action_destroy(exts->action, TCA_ACT_UNBIND); |
| 503 | exts->action = NULL; |
| 504 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 505 | #endif |
| 506 | } |
Stephen Hemminger | aa767bf | 2008-01-21 02:26:41 -0800 | [diff] [blame] | 507 | EXPORT_SYMBOL(tcf_exts_destroy); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 508 | |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 509 | int tcf_exts_validate(struct tcf_proto *tp, struct nlattr **tb, |
| 510 | struct nlattr *rate_tlv, struct tcf_exts *exts, |
Patrick McHardy | 5239008 | 2008-01-31 18:36:18 -0800 | [diff] [blame] | 511 | const struct tcf_ext_map *map) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 512 | { |
| 513 | memset(exts, 0, sizeof(*exts)); |
YOSHIFUJI Hideaki | 10297b9 | 2007-02-09 23:25:16 +0900 | [diff] [blame] | 514 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 515 | #ifdef CONFIG_NET_CLS_ACT |
| 516 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 517 | struct tc_action *act; |
| 518 | |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 519 | if (map->police && tb[map->police]) { |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 520 | act = tcf_action_init_1(tb[map->police], rate_tlv, |
Stephen Hemminger | aa767bf | 2008-01-21 02:26:41 -0800 | [diff] [blame] | 521 | "police", TCA_ACT_NOREPLACE, |
Patrick McHardy | ab27cfb | 2008-01-23 20:33:13 -0800 | [diff] [blame] | 522 | TCA_ACT_BIND); |
| 523 | if (IS_ERR(act)) |
| 524 | return PTR_ERR(act); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 525 | |
| 526 | act->type = TCA_OLD_COMPAT; |
| 527 | exts->action = act; |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 528 | } else if (map->action && tb[map->action]) { |
Patrick McHardy | 7ba699c | 2008-01-22 22:11:50 -0800 | [diff] [blame] | 529 | act = tcf_action_init(tb[map->action], rate_tlv, NULL, |
Patrick McHardy | ab27cfb | 2008-01-23 20:33:13 -0800 | [diff] [blame] | 530 | TCA_ACT_NOREPLACE, TCA_ACT_BIND); |
| 531 | if (IS_ERR(act)) |
| 532 | return PTR_ERR(act); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 533 | |
| 534 | exts->action = act; |
| 535 | } |
| 536 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 537 | #else |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 538 | if ((map->action && tb[map->action]) || |
| 539 | (map->police && tb[map->police])) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 540 | return -EOPNOTSUPP; |
| 541 | #endif |
| 542 | |
| 543 | return 0; |
| 544 | } |
Stephen Hemminger | aa767bf | 2008-01-21 02:26:41 -0800 | [diff] [blame] | 545 | EXPORT_SYMBOL(tcf_exts_validate); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 546 | |
Stephen Hemminger | aa767bf | 2008-01-21 02:26:41 -0800 | [diff] [blame] | 547 | void tcf_exts_change(struct tcf_proto *tp, struct tcf_exts *dst, |
| 548 | struct tcf_exts *src) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 549 | { |
| 550 | #ifdef CONFIG_NET_CLS_ACT |
| 551 | if (src->action) { |
| 552 | struct tc_action *act; |
| 553 | tcf_tree_lock(tp); |
Patrick McHardy | 47a1a1d | 2008-11-19 08:03:09 +0000 | [diff] [blame] | 554 | act = dst->action; |
| 555 | dst->action = src->action; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 556 | tcf_tree_unlock(tp); |
| 557 | if (act) |
| 558 | tcf_action_destroy(act, TCA_ACT_UNBIND); |
| 559 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 560 | #endif |
| 561 | } |
Stephen Hemminger | aa767bf | 2008-01-21 02:26:41 -0800 | [diff] [blame] | 562 | EXPORT_SYMBOL(tcf_exts_change); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 563 | |
Stephen Hemminger | aa767bf | 2008-01-21 02:26:41 -0800 | [diff] [blame] | 564 | int tcf_exts_dump(struct sk_buff *skb, struct tcf_exts *exts, |
Patrick McHardy | 5239008 | 2008-01-31 18:36:18 -0800 | [diff] [blame] | 565 | const struct tcf_ext_map *map) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 566 | { |
| 567 | #ifdef CONFIG_NET_CLS_ACT |
| 568 | if (map->action && exts->action) { |
| 569 | /* |
| 570 | * again for backward compatible mode - we want |
| 571 | * to work with both old and new modes of entering |
| 572 | * tc data even if iproute2 was newer - jhs |
| 573 | */ |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 574 | struct nlattr *nest; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 575 | |
| 576 | if (exts->action->type != TCA_OLD_COMPAT) { |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 577 | nest = nla_nest_start(skb, map->action); |
| 578 | if (nest == NULL) |
| 579 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 580 | if (tcf_action_dump(skb, exts->action, 0, 0) < 0) |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 581 | goto nla_put_failure; |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 582 | nla_nest_end(skb, nest); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 583 | } else if (map->police) { |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 584 | nest = nla_nest_start(skb, map->police); |
| 585 | if (nest == NULL) |
| 586 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 587 | if (tcf_action_dump_old(skb, exts->action, 0, 0) < 0) |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 588 | goto nla_put_failure; |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 589 | nla_nest_end(skb, nest); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 590 | } |
| 591 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 592 | #endif |
| 593 | return 0; |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 594 | nla_put_failure: __attribute__ ((unused)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 595 | return -1; |
| 596 | } |
Stephen Hemminger | aa767bf | 2008-01-21 02:26:41 -0800 | [diff] [blame] | 597 | EXPORT_SYMBOL(tcf_exts_dump); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 598 | |
Stephen Hemminger | aa767bf | 2008-01-21 02:26:41 -0800 | [diff] [blame] | 599 | |
| 600 | int tcf_exts_dump_stats(struct sk_buff *skb, struct tcf_exts *exts, |
Patrick McHardy | 5239008 | 2008-01-31 18:36:18 -0800 | [diff] [blame] | 601 | const struct tcf_ext_map *map) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 602 | { |
| 603 | #ifdef CONFIG_NET_CLS_ACT |
| 604 | if (exts->action) |
| 605 | if (tcf_action_copy_stats(skb, exts->action, 1) < 0) |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 606 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 607 | #endif |
| 608 | return 0; |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 609 | nla_put_failure: __attribute__ ((unused)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 610 | return -1; |
| 611 | } |
Stephen Hemminger | aa767bf | 2008-01-21 02:26:41 -0800 | [diff] [blame] | 612 | EXPORT_SYMBOL(tcf_exts_dump_stats); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 613 | |
| 614 | static int __init tc_filter_init(void) |
| 615 | { |
Greg Rose | c7ac867 | 2011-06-10 01:27:09 +0000 | [diff] [blame] | 616 | rtnl_register(PF_UNSPEC, RTM_NEWTFILTER, tc_ctl_tfilter, NULL, NULL); |
| 617 | rtnl_register(PF_UNSPEC, RTM_DELTFILTER, tc_ctl_tfilter, NULL, NULL); |
Thomas Graf | 82623c0 | 2007-03-22 11:56:22 -0700 | [diff] [blame] | 618 | rtnl_register(PF_UNSPEC, RTM_GETTFILTER, tc_ctl_tfilter, |
Greg Rose | c7ac867 | 2011-06-10 01:27:09 +0000 | [diff] [blame] | 619 | tc_dump_tfilter, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 620 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 621 | return 0; |
| 622 | } |
| 623 | |
| 624 | subsys_initcall(tc_filter_init); |