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> |
Patrick McHardy | ab27cfb | 2008-01-23 20:33:13 -0800 | [diff] [blame] | 25 | #include <linux/err.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 26 | #include <linux/slab.h> |
Denis V. Lunev | b854272 | 2007-12-01 00:21:31 +1100 | [diff] [blame] | 27 | #include <net/net_namespace.h> |
| 28 | #include <net/sock.h> |
Arnaldo Carvalho de Melo | dc5fc57 | 2007-03-25 23:06:12 -0700 | [diff] [blame] | 29 | #include <net/netlink.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | #include <net/pkt_sched.h> |
| 31 | #include <net/pkt_cls.h> |
| 32 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | /* The list of all installed classifier types */ |
WANG Cong | 3627287 | 2013-12-15 20:15:11 -0800 | [diff] [blame] | 34 | static LIST_HEAD(tcf_proto_base); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | |
| 36 | /* Protects list of registered TC modules. It is pure SMP lock. */ |
| 37 | static DEFINE_RWLOCK(cls_mod_lock); |
| 38 | |
| 39 | /* Find classifier type by string name */ |
| 40 | |
Eric Dumazet | dc7f9f6 | 2011-07-05 23:25:42 +0000 | [diff] [blame] | 41 | 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] | 42 | { |
Eric Dumazet | dcd7608 | 2013-12-20 10:04:18 -0800 | [diff] [blame] | 43 | const struct tcf_proto_ops *t, *res = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | |
| 45 | if (kind) { |
| 46 | read_lock(&cls_mod_lock); |
WANG Cong | 3627287 | 2013-12-15 20:15:11 -0800 | [diff] [blame] | 47 | list_for_each_entry(t, &tcf_proto_base, head) { |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 48 | if (nla_strcmp(kind, t->kind) == 0) { |
Eric Dumazet | dcd7608 | 2013-12-20 10:04:18 -0800 | [diff] [blame] | 49 | if (try_module_get(t->owner)) |
| 50 | res = t; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | break; |
| 52 | } |
| 53 | } |
| 54 | read_unlock(&cls_mod_lock); |
| 55 | } |
Eric Dumazet | dcd7608 | 2013-12-20 10:04:18 -0800 | [diff] [blame] | 56 | return res; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 57 | } |
| 58 | |
| 59 | /* Register(unregister) new classifier type */ |
| 60 | |
| 61 | int register_tcf_proto_ops(struct tcf_proto_ops *ops) |
| 62 | { |
WANG Cong | 3627287 | 2013-12-15 20:15:11 -0800 | [diff] [blame] | 63 | struct tcf_proto_ops *t; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | int rc = -EEXIST; |
| 65 | |
| 66 | write_lock(&cls_mod_lock); |
WANG Cong | 3627287 | 2013-12-15 20:15:11 -0800 | [diff] [blame] | 67 | list_for_each_entry(t, &tcf_proto_base, head) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | if (!strcmp(ops->kind, t->kind)) |
| 69 | goto out; |
| 70 | |
WANG Cong | 3627287 | 2013-12-15 20:15:11 -0800 | [diff] [blame] | 71 | list_add_tail(&ops->head, &tcf_proto_base); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | rc = 0; |
| 73 | out: |
| 74 | write_unlock(&cls_mod_lock); |
| 75 | return rc; |
| 76 | } |
Stephen Hemminger | aa767bf | 2008-01-21 02:26:41 -0800 | [diff] [blame] | 77 | EXPORT_SYMBOL(register_tcf_proto_ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 78 | |
| 79 | int unregister_tcf_proto_ops(struct tcf_proto_ops *ops) |
| 80 | { |
WANG Cong | 3627287 | 2013-12-15 20:15:11 -0800 | [diff] [blame] | 81 | struct tcf_proto_ops *t; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 82 | int rc = -ENOENT; |
| 83 | |
| 84 | write_lock(&cls_mod_lock); |
Eric Dumazet | dcd7608 | 2013-12-20 10:04:18 -0800 | [diff] [blame] | 85 | list_for_each_entry(t, &tcf_proto_base, head) { |
| 86 | if (t == ops) { |
| 87 | list_del(&t->head); |
| 88 | rc = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 89 | break; |
Eric Dumazet | dcd7608 | 2013-12-20 10:04:18 -0800 | [diff] [blame] | 90 | } |
| 91 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 92 | write_unlock(&cls_mod_lock); |
| 93 | return rc; |
| 94 | } |
Stephen Hemminger | aa767bf | 2008-01-21 02:26:41 -0800 | [diff] [blame] | 95 | EXPORT_SYMBOL(unregister_tcf_proto_ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 96 | |
Tom Goff | 7316ae8 | 2010-03-19 15:40:13 +0000 | [diff] [blame] | 97 | static int tfilter_notify(struct net *net, struct sk_buff *oskb, |
| 98 | struct nlmsghdr *n, struct tcf_proto *tp, |
| 99 | unsigned long fh, int event); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 100 | |
| 101 | |
| 102 | /* Select new prio value from the range, managed by kernel. */ |
| 103 | |
Stephen Hemminger | aa767bf | 2008-01-21 02:26:41 -0800 | [diff] [blame] | 104 | static inline u32 tcf_auto_prio(struct tcf_proto *tp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 105 | { |
Stephen Hemminger | aa767bf | 2008-01-21 02:26:41 -0800 | [diff] [blame] | 106 | u32 first = TC_H_MAKE(0xC0000000U, 0U); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 107 | |
| 108 | if (tp) |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 109 | first = tp->prio - 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 110 | |
| 111 | return first; |
| 112 | } |
| 113 | |
| 114 | /* Add/change/delete/get a filter node */ |
| 115 | |
Thomas Graf | 661d296 | 2013-03-21 07:45:29 +0000 | [diff] [blame] | 116 | static int tc_ctl_tfilter(struct sk_buff *skb, struct nlmsghdr *n) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 117 | { |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 118 | struct net *net = sock_net(skb->sk); |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 119 | struct nlattr *tca[TCA_MAX + 1]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 120 | struct tcmsg *t; |
| 121 | u32 protocol; |
| 122 | u32 prio; |
| 123 | u32 nprio; |
| 124 | u32 parent; |
| 125 | struct net_device *dev; |
| 126 | struct Qdisc *q; |
John Fastabend | 25d8c0d | 2014-09-12 20:05:27 -0700 | [diff] [blame] | 127 | struct tcf_proto __rcu **back; |
| 128 | struct tcf_proto __rcu **chain; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 129 | struct tcf_proto *tp; |
Eric Dumazet | dc7f9f6 | 2011-07-05 23:25:42 +0000 | [diff] [blame] | 130 | const struct tcf_proto_ops *tp_ops; |
Eric Dumazet | 20fea08 | 2007-11-14 01:44:41 -0800 | [diff] [blame] | 131 | const struct Qdisc_class_ops *cops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 132 | unsigned long cl; |
| 133 | unsigned long fh; |
| 134 | int err; |
Minoru Usui | 12186be | 2009-06-02 02:17:34 -0700 | [diff] [blame] | 135 | int tp_created = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 136 | |
Stéphane Graber | 4e8bbb8 | 2014-04-30 11:25:43 -0400 | [diff] [blame] | 137 | if ((n->nlmsg_type != RTM_GETTFILTER) && |
David S. Miller | 5f013c9b | 2014-05-12 13:19:14 -0400 | [diff] [blame] | 138 | !netlink_ns_capable(skb, net->user_ns, CAP_NET_ADMIN)) |
Eric W. Biederman | dfc47ef | 2012-11-16 03:03:00 +0000 | [diff] [blame] | 139 | return -EPERM; |
Hong zhi guo | de179c8 | 2013-03-25 17:36:33 +0000 | [diff] [blame] | 140 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 141 | replay: |
Hong zhi guo | de179c8 | 2013-03-25 17:36:33 +0000 | [diff] [blame] | 142 | err = nlmsg_parse(n, sizeof(*t), tca, TCA_MAX, NULL); |
| 143 | if (err < 0) |
| 144 | return err; |
| 145 | |
David S. Miller | 942b816 | 2012-06-26 21:48:50 -0700 | [diff] [blame] | 146 | t = nlmsg_data(n); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 147 | protocol = TC_H_MIN(t->tcm_info); |
| 148 | prio = TC_H_MAJ(t->tcm_info); |
| 149 | nprio = prio; |
| 150 | parent = t->tcm_parent; |
| 151 | cl = 0; |
| 152 | |
| 153 | if (prio == 0) { |
| 154 | /* If no priority is given, user wants we allocated it. */ |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 155 | if (n->nlmsg_type != RTM_NEWTFILTER || |
| 156 | !(n->nlmsg_flags & NLM_F_CREATE)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 157 | return -ENOENT; |
Stephen Hemminger | aa767bf | 2008-01-21 02:26:41 -0800 | [diff] [blame] | 158 | prio = TC_H_MAKE(0x80000000U, 0U); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 159 | } |
| 160 | |
| 161 | /* Find head of filter chain. */ |
| 162 | |
| 163 | /* Find link */ |
Tom Goff | 7316ae8 | 2010-03-19 15:40:13 +0000 | [diff] [blame] | 164 | dev = __dev_get_by_index(net, t->tcm_ifindex); |
Stephen Hemminger | aa767bf | 2008-01-21 02:26:41 -0800 | [diff] [blame] | 165 | if (dev == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 166 | return -ENODEV; |
| 167 | |
| 168 | /* Find qdisc */ |
| 169 | if (!parent) { |
Patrick McHardy | af356af | 2009-09-04 06:41:18 +0000 | [diff] [blame] | 170 | q = dev->qdisc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 171 | parent = q->handle; |
Stephen Hemminger | aa767bf | 2008-01-21 02:26:41 -0800 | [diff] [blame] | 172 | } else { |
| 173 | q = qdisc_lookup(dev, TC_H_MAJ(t->tcm_parent)); |
| 174 | if (q == NULL) |
| 175 | return -EINVAL; |
| 176 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 177 | |
| 178 | /* Is it classful? */ |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 179 | cops = q->ops->cl_ops; |
| 180 | if (!cops) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 181 | return -EINVAL; |
| 182 | |
Patrick McHardy | 71ebe5e | 2009-09-04 06:41:15 +0000 | [diff] [blame] | 183 | if (cops->tcf_chain == NULL) |
| 184 | return -EOPNOTSUPP; |
| 185 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 186 | /* Do we search for filter, attached to class? */ |
| 187 | if (TC_H_MIN(parent)) { |
| 188 | cl = cops->get(q, parent); |
| 189 | if (cl == 0) |
| 190 | return -ENOENT; |
| 191 | } |
| 192 | |
| 193 | /* And the last stroke */ |
| 194 | chain = cops->tcf_chain(q, cl); |
| 195 | err = -EINVAL; |
| 196 | if (chain == NULL) |
| 197 | goto errout; |
| 198 | |
| 199 | /* Check the chain for existence of proto-tcf with this priority */ |
John Fastabend | 25d8c0d | 2014-09-12 20:05:27 -0700 | [diff] [blame] | 200 | for (back = chain; |
| 201 | (tp = rtnl_dereference(*back)) != NULL; |
| 202 | back = &tp->next) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 203 | if (tp->prio >= prio) { |
| 204 | if (tp->prio == prio) { |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 205 | if (!nprio || |
| 206 | (tp->protocol != protocol && protocol)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 207 | goto errout; |
| 208 | } else |
| 209 | tp = NULL; |
| 210 | break; |
| 211 | } |
| 212 | } |
| 213 | |
| 214 | if (tp == NULL) { |
| 215 | /* Proto-tcf does not exist, create new one */ |
| 216 | |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 217 | if (tca[TCA_KIND] == NULL || !protocol) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 218 | goto errout; |
| 219 | |
| 220 | err = -ENOENT; |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 221 | if (n->nlmsg_type != RTM_NEWTFILTER || |
| 222 | !(n->nlmsg_flags & NLM_F_CREATE)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 223 | goto errout; |
| 224 | |
| 225 | |
| 226 | /* Create new proto tcf */ |
| 227 | |
| 228 | err = -ENOBUFS; |
Stephen Hemminger | aa767bf | 2008-01-21 02:26:41 -0800 | [diff] [blame] | 229 | tp = kzalloc(sizeof(*tp), GFP_KERNEL); |
| 230 | if (tp == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 231 | goto errout; |
Patrick McHardy | f2df824 | 2008-05-20 14:34:46 -0700 | [diff] [blame] | 232 | err = -ENOENT; |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 233 | tp_ops = tcf_proto_lookup_ops(tca[TCA_KIND]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 234 | if (tp_ops == NULL) { |
Johannes Berg | 95a5afc | 2008-10-16 15:24:51 -0700 | [diff] [blame] | 235 | #ifdef CONFIG_MODULES |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 236 | struct nlattr *kind = tca[TCA_KIND]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 237 | char name[IFNAMSIZ]; |
| 238 | |
| 239 | if (kind != NULL && |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 240 | nla_strlcpy(name, kind, IFNAMSIZ) < IFNAMSIZ) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 241 | rtnl_unlock(); |
| 242 | request_module("cls_%s", name); |
| 243 | rtnl_lock(); |
| 244 | tp_ops = tcf_proto_lookup_ops(kind); |
| 245 | /* We dropped the RTNL semaphore in order to |
| 246 | * perform the module load. So, even if we |
| 247 | * succeeded in loading the module we have to |
| 248 | * replay the request. We indicate this using |
| 249 | * -EAGAIN. |
| 250 | */ |
| 251 | if (tp_ops != NULL) { |
| 252 | module_put(tp_ops->owner); |
| 253 | err = -EAGAIN; |
| 254 | } |
| 255 | } |
| 256 | #endif |
| 257 | kfree(tp); |
| 258 | goto errout; |
| 259 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 260 | tp->ops = tp_ops; |
| 261 | tp->protocol = protocol; |
John Fastabend | 25d8c0d | 2014-09-12 20:05:27 -0700 | [diff] [blame] | 262 | tp->prio = nprio ? : |
| 263 | TC_H_MAJ(tcf_auto_prio(rtnl_dereference(*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) { |
John Fastabend | 25d8c0d | 2014-09-12 20:05:27 -0700 | [diff] [blame] | 284 | struct tcf_proto *next = rtnl_dereference(tp->next); |
| 285 | |
| 286 | RCU_INIT_POINTER(*back, next); |
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); |
Cong Wang | 1e052be | 2015-03-06 11:47:59 -0800 | [diff] [blame] | 289 | tcf_destroy(tp, true); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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) |
Cong Wang | 1e052be | 2015-03-06 11:47:59 -0800 | [diff] [blame] | 304 | tcf_destroy(tp, true); |
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); |
Cong Wang | 1e052be | 2015-03-06 11:47:59 -0800 | [diff] [blame] | 310 | if (err == 0) { |
WANG Cong | d744318 | 2015-05-05 15:22:02 -0700 | [diff] [blame] | 311 | struct tcf_proto *next = rtnl_dereference(tp->next); |
Cong Wang | 1e052be | 2015-03-06 11:47:59 -0800 | [diff] [blame] | 312 | |
WANG Cong | d744318 | 2015-05-05 15:22:02 -0700 | [diff] [blame] | 313 | tfilter_notify(net, skb, n, tp, fh, RTM_DELTFILTER); |
| 314 | if (tcf_destroy(tp, false)) |
Cong Wang | 1e052be | 2015-03-06 11:47:59 -0800 | [diff] [blame] | 315 | RCU_INIT_POINTER(*back, next); |
Cong Wang | 1e052be | 2015-03-06 11:47:59 -0800 | [diff] [blame] | 316 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 317 | goto errout; |
| 318 | case RTM_GETTFILTER: |
Tom Goff | 7316ae8 | 2010-03-19 15:40:13 +0000 | [diff] [blame] | 319 | err = tfilter_notify(net, skb, n, tp, fh, RTM_NEWTFILTER); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 320 | goto errout; |
| 321 | default: |
| 322 | err = -EINVAL; |
| 323 | goto errout; |
| 324 | } |
| 325 | } |
| 326 | |
Cong Wang | 2f7ef2f | 2014-04-25 13:54:06 -0700 | [diff] [blame] | 327 | err = tp->ops->change(net, skb, tp, cl, t->tcm_handle, tca, &fh, |
| 328 | n->nlmsg_flags & NLM_F_CREATE ? TCA_ACT_NOREPLACE : TCA_ACT_REPLACE); |
Minoru Usui | 12186be | 2009-06-02 02:17:34 -0700 | [diff] [blame] | 329 | if (err == 0) { |
| 330 | if (tp_created) { |
John Fastabend | 25d8c0d | 2014-09-12 20:05:27 -0700 | [diff] [blame] | 331 | RCU_INIT_POINTER(tp->next, rtnl_dereference(*back)); |
| 332 | rcu_assign_pointer(*back, tp); |
Minoru Usui | 12186be | 2009-06-02 02:17:34 -0700 | [diff] [blame] | 333 | } |
Tom Goff | 7316ae8 | 2010-03-19 15:40:13 +0000 | [diff] [blame] | 334 | tfilter_notify(net, skb, n, tp, fh, RTM_NEWTFILTER); |
Minoru Usui | 12186be | 2009-06-02 02:17:34 -0700 | [diff] [blame] | 335 | } else { |
| 336 | if (tp_created) |
Cong Wang | 1e052be | 2015-03-06 11:47:59 -0800 | [diff] [blame] | 337 | tcf_destroy(tp, true); |
Minoru Usui | 12186be | 2009-06-02 02:17:34 -0700 | [diff] [blame] | 338 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 339 | |
| 340 | errout: |
| 341 | if (cl) |
| 342 | cops->put(q, cl); |
| 343 | if (err == -EAGAIN) |
| 344 | /* Replay the request. */ |
| 345 | goto replay; |
| 346 | return err; |
| 347 | } |
| 348 | |
WANG Cong | 832d1d5 | 2014-01-09 16:14:01 -0800 | [diff] [blame] | 349 | static int tcf_fill_node(struct net *net, struct sk_buff *skb, struct tcf_proto *tp, |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 350 | unsigned long fh, u32 portid, u32 seq, u16 flags, int event) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 351 | { |
| 352 | struct tcmsg *tcm; |
| 353 | struct nlmsghdr *nlh; |
Arnaldo Carvalho de Melo | 27a884d | 2007-04-19 20:29:13 -0700 | [diff] [blame] | 354 | unsigned char *b = skb_tail_pointer(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 355 | |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 356 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(*tcm), flags); |
David S. Miller | 942b816 | 2012-06-26 21:48:50 -0700 | [diff] [blame] | 357 | if (!nlh) |
| 358 | goto out_nlmsg_trim; |
| 359 | tcm = nlmsg_data(nlh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 360 | tcm->tcm_family = AF_UNSPEC; |
Patrick McHardy | 9ef1d4c | 2005-06-28 12:55:30 -0700 | [diff] [blame] | 361 | tcm->tcm__pad1 = 0; |
Jiri Pirko | ad61df9 | 2009-10-08 01:21:46 -0700 | [diff] [blame] | 362 | tcm->tcm__pad2 = 0; |
David S. Miller | 5ce2d48 | 2008-07-08 17:06:30 -0700 | [diff] [blame] | 363 | tcm->tcm_ifindex = qdisc_dev(tp->q)->ifindex; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 364 | tcm->tcm_parent = tp->classid; |
| 365 | tcm->tcm_info = TC_H_MAKE(tp->prio, tp->protocol); |
David S. Miller | 1b34ec4 | 2012-03-29 05:11:39 -0400 | [diff] [blame] | 366 | if (nla_put_string(skb, TCA_KIND, tp->ops->kind)) |
| 367 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 368 | tcm->tcm_handle = fh; |
| 369 | if (RTM_DELTFILTER != event) { |
| 370 | tcm->tcm_handle = 0; |
WANG Cong | 832d1d5 | 2014-01-09 16:14:01 -0800 | [diff] [blame] | 371 | if (tp->ops->dump && tp->ops->dump(net, tp, fh, skb, tcm) < 0) |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 372 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 373 | } |
Arnaldo Carvalho de Melo | 27a884d | 2007-04-19 20:29:13 -0700 | [diff] [blame] | 374 | nlh->nlmsg_len = skb_tail_pointer(skb) - b; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 375 | return skb->len; |
| 376 | |
David S. Miller | 942b816 | 2012-06-26 21:48:50 -0700 | [diff] [blame] | 377 | out_nlmsg_trim: |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 378 | nla_put_failure: |
Arnaldo Carvalho de Melo | dc5fc57 | 2007-03-25 23:06:12 -0700 | [diff] [blame] | 379 | nlmsg_trim(skb, b); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 380 | return -1; |
| 381 | } |
| 382 | |
Tom Goff | 7316ae8 | 2010-03-19 15:40:13 +0000 | [diff] [blame] | 383 | static int tfilter_notify(struct net *net, struct sk_buff *oskb, |
| 384 | struct nlmsghdr *n, struct tcf_proto *tp, |
| 385 | unsigned long fh, int event) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 386 | { |
| 387 | struct sk_buff *skb; |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 388 | u32 portid = oskb ? NETLINK_CB(oskb).portid : 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 389 | |
| 390 | skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); |
| 391 | if (!skb) |
| 392 | return -ENOBUFS; |
| 393 | |
WANG Cong | 832d1d5 | 2014-01-09 16:14:01 -0800 | [diff] [blame] | 394 | if (tcf_fill_node(net, skb, tp, fh, portid, n->nlmsg_seq, 0, event) <= 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 395 | kfree_skb(skb); |
| 396 | return -EINVAL; |
| 397 | } |
| 398 | |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 399 | return rtnetlink_send(skb, net, portid, RTNLGRP_TC, |
Stephen Hemminger | aa767bf | 2008-01-21 02:26:41 -0800 | [diff] [blame] | 400 | n->nlmsg_flags & NLM_F_ECHO); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 401 | } |
| 402 | |
Stephen Hemminger | aa767bf | 2008-01-21 02:26:41 -0800 | [diff] [blame] | 403 | struct tcf_dump_args { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 404 | struct tcf_walker w; |
| 405 | struct sk_buff *skb; |
| 406 | struct netlink_callback *cb; |
| 407 | }; |
| 408 | |
Stephen Hemminger | aa767bf | 2008-01-21 02:26:41 -0800 | [diff] [blame] | 409 | static int tcf_node_dump(struct tcf_proto *tp, unsigned long n, |
| 410 | struct tcf_walker *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 411 | { |
Stephen Hemminger | aa767bf | 2008-01-21 02:26:41 -0800 | [diff] [blame] | 412 | struct tcf_dump_args *a = (void *)arg; |
WANG Cong | 832d1d5 | 2014-01-09 16:14:01 -0800 | [diff] [blame] | 413 | struct net *net = sock_net(a->skb->sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 414 | |
WANG Cong | 832d1d5 | 2014-01-09 16:14:01 -0800 | [diff] [blame] | 415 | return tcf_fill_node(net, a->skb, tp, n, NETLINK_CB(a->cb->skb).portid, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 416 | a->cb->nlh->nlmsg_seq, NLM_F_MULTI, RTM_NEWTFILTER); |
| 417 | } |
| 418 | |
Eric Dumazet | bd27a87 | 2009-11-05 20:57:26 -0800 | [diff] [blame] | 419 | /* called with RTNL */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 420 | static int tc_dump_tfilter(struct sk_buff *skb, struct netlink_callback *cb) |
| 421 | { |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 422 | struct net *net = sock_net(skb->sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 423 | int t; |
| 424 | int s_t; |
| 425 | struct net_device *dev; |
| 426 | struct Qdisc *q; |
John Fastabend | 25d8c0d | 2014-09-12 20:05:27 -0700 | [diff] [blame] | 427 | struct tcf_proto *tp, __rcu **chain; |
David S. Miller | 942b816 | 2012-06-26 21:48:50 -0700 | [diff] [blame] | 428 | struct tcmsg *tcm = nlmsg_data(cb->nlh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 429 | unsigned long cl = 0; |
Eric Dumazet | 20fea08 | 2007-11-14 01:44:41 -0800 | [diff] [blame] | 430 | const struct Qdisc_class_ops *cops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 431 | struct tcf_dump_args arg; |
| 432 | |
Hong zhi guo | 573ce26 | 2013-03-27 06:47:04 +0000 | [diff] [blame] | 433 | if (nlmsg_len(cb->nlh) < sizeof(*tcm)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 434 | return skb->len; |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 435 | dev = __dev_get_by_index(net, tcm->tcm_ifindex); |
| 436 | if (!dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 437 | return skb->len; |
| 438 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 439 | if (!tcm->tcm_parent) |
Patrick McHardy | af356af | 2009-09-04 06:41:18 +0000 | [diff] [blame] | 440 | q = dev->qdisc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 441 | else |
| 442 | q = qdisc_lookup(dev, TC_H_MAJ(tcm->tcm_parent)); |
| 443 | if (!q) |
| 444 | goto out; |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 445 | cops = q->ops->cl_ops; |
| 446 | if (!cops) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 447 | goto errout; |
Patrick McHardy | 71ebe5e | 2009-09-04 06:41:15 +0000 | [diff] [blame] | 448 | if (cops->tcf_chain == NULL) |
| 449 | goto errout; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 450 | if (TC_H_MIN(tcm->tcm_parent)) { |
| 451 | cl = cops->get(q, tcm->tcm_parent); |
| 452 | if (cl == 0) |
| 453 | goto errout; |
| 454 | } |
| 455 | chain = cops->tcf_chain(q, cl); |
| 456 | if (chain == NULL) |
| 457 | goto errout; |
| 458 | |
| 459 | s_t = cb->args[0]; |
| 460 | |
John Fastabend | 25d8c0d | 2014-09-12 20:05:27 -0700 | [diff] [blame] | 461 | for (tp = rtnl_dereference(*chain), t = 0; |
| 462 | tp; tp = rtnl_dereference(tp->next), t++) { |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 463 | if (t < s_t) |
| 464 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 465 | if (TC_H_MAJ(tcm->tcm_info) && |
| 466 | TC_H_MAJ(tcm->tcm_info) != tp->prio) |
| 467 | continue; |
| 468 | if (TC_H_MIN(tcm->tcm_info) && |
| 469 | TC_H_MIN(tcm->tcm_info) != tp->protocol) |
| 470 | continue; |
| 471 | if (t > s_t) |
| 472 | memset(&cb->args[1], 0, sizeof(cb->args)-sizeof(cb->args[0])); |
| 473 | if (cb->args[1] == 0) { |
WANG Cong | 832d1d5 | 2014-01-09 16:14:01 -0800 | [diff] [blame] | 474 | if (tcf_fill_node(net, skb, tp, 0, NETLINK_CB(cb->skb).portid, |
Stephen Hemminger | aa767bf | 2008-01-21 02:26:41 -0800 | [diff] [blame] | 475 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
| 476 | RTM_NEWTFILTER) <= 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 477 | break; |
Stephen Hemminger | aa767bf | 2008-01-21 02:26:41 -0800 | [diff] [blame] | 478 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 479 | cb->args[1] = 1; |
| 480 | } |
| 481 | if (tp->ops->walk == NULL) |
| 482 | continue; |
| 483 | arg.w.fn = tcf_node_dump; |
| 484 | arg.skb = skb; |
| 485 | arg.cb = cb; |
| 486 | arg.w.stop = 0; |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 487 | arg.w.skip = cb->args[1] - 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 488 | arg.w.count = 0; |
| 489 | tp->ops->walk(tp, &arg.w); |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 490 | cb->args[1] = arg.w.count + 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 491 | if (arg.w.stop) |
| 492 | break; |
| 493 | } |
| 494 | |
| 495 | cb->args[0] = t; |
| 496 | |
| 497 | errout: |
| 498 | if (cl) |
| 499 | cops->put(q, cl); |
| 500 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 501 | return skb->len; |
| 502 | } |
| 503 | |
WANG Cong | 18d0264 | 2014-09-25 10:26:37 -0700 | [diff] [blame] | 504 | void tcf_exts_destroy(struct tcf_exts *exts) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 505 | { |
| 506 | #ifdef CONFIG_NET_CLS_ACT |
WANG Cong | 33be627 | 2013-12-15 20:15:05 -0800 | [diff] [blame] | 507 | tcf_action_destroy(&exts->actions, TCA_ACT_UNBIND); |
| 508 | INIT_LIST_HEAD(&exts->actions); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 509 | #endif |
| 510 | } |
Stephen Hemminger | aa767bf | 2008-01-21 02:26:41 -0800 | [diff] [blame] | 511 | EXPORT_SYMBOL(tcf_exts_destroy); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 512 | |
Benjamin LaHaise | c1b5273 | 2013-01-14 05:15:39 +0000 | [diff] [blame] | 513 | int tcf_exts_validate(struct net *net, struct tcf_proto *tp, struct nlattr **tb, |
Cong Wang | 2f7ef2f | 2014-04-25 13:54:06 -0700 | [diff] [blame] | 514 | struct nlattr *rate_tlv, struct tcf_exts *exts, bool ovr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 515 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 516 | #ifdef CONFIG_NET_CLS_ACT |
| 517 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 518 | struct tc_action *act; |
| 519 | |
WANG Cong | 33be627 | 2013-12-15 20:15:05 -0800 | [diff] [blame] | 520 | INIT_LIST_HEAD(&exts->actions); |
WANG Cong | 5da57f4 | 2013-12-15 20:15:07 -0800 | [diff] [blame] | 521 | if (exts->police && tb[exts->police]) { |
| 522 | act = tcf_action_init_1(net, tb[exts->police], rate_tlv, |
Cong Wang | 2f7ef2f | 2014-04-25 13:54:06 -0700 | [diff] [blame] | 523 | "police", ovr, |
Patrick McHardy | ab27cfb | 2008-01-23 20:33:13 -0800 | [diff] [blame] | 524 | TCA_ACT_BIND); |
| 525 | if (IS_ERR(act)) |
| 526 | return PTR_ERR(act); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 527 | |
WANG Cong | 33be627 | 2013-12-15 20:15:05 -0800 | [diff] [blame] | 528 | act->type = exts->type = TCA_OLD_COMPAT; |
| 529 | list_add(&act->list, &exts->actions); |
WANG Cong | 5da57f4 | 2013-12-15 20:15:07 -0800 | [diff] [blame] | 530 | } else if (exts->action && tb[exts->action]) { |
WANG Cong | 33be627 | 2013-12-15 20:15:05 -0800 | [diff] [blame] | 531 | int err; |
WANG Cong | 5da57f4 | 2013-12-15 20:15:07 -0800 | [diff] [blame] | 532 | err = tcf_action_init(net, tb[exts->action], rate_tlv, |
Cong Wang | 2f7ef2f | 2014-04-25 13:54:06 -0700 | [diff] [blame] | 533 | NULL, ovr, |
WANG Cong | 33be627 | 2013-12-15 20:15:05 -0800 | [diff] [blame] | 534 | TCA_ACT_BIND, &exts->actions); |
| 535 | if (err) |
| 536 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 537 | } |
| 538 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 539 | #else |
WANG Cong | 5da57f4 | 2013-12-15 20:15:07 -0800 | [diff] [blame] | 540 | if ((exts->action && tb[exts->action]) || |
| 541 | (exts->police && tb[exts->police])) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 542 | return -EOPNOTSUPP; |
| 543 | #endif |
| 544 | |
| 545 | return 0; |
| 546 | } |
Stephen Hemminger | aa767bf | 2008-01-21 02:26:41 -0800 | [diff] [blame] | 547 | EXPORT_SYMBOL(tcf_exts_validate); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 548 | |
Stephen Hemminger | aa767bf | 2008-01-21 02:26:41 -0800 | [diff] [blame] | 549 | void tcf_exts_change(struct tcf_proto *tp, struct tcf_exts *dst, |
| 550 | struct tcf_exts *src) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 551 | { |
| 552 | #ifdef CONFIG_NET_CLS_ACT |
Cong Wang | a49eb42 | 2014-04-25 13:55:30 -0700 | [diff] [blame] | 553 | LIST_HEAD(tmp); |
| 554 | tcf_tree_lock(tp); |
| 555 | list_splice_init(&dst->actions, &tmp); |
| 556 | list_splice(&src->actions, &dst->actions); |
WANG Cong | 5301e3e | 2014-10-06 17:21:54 -0700 | [diff] [blame] | 557 | dst->type = src->type; |
Cong Wang | a49eb42 | 2014-04-25 13:55:30 -0700 | [diff] [blame] | 558 | tcf_tree_unlock(tp); |
| 559 | tcf_action_destroy(&tmp, TCA_ACT_UNBIND); |
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 | |
Ignacy Gawędzki | b057df2 | 2015-02-03 19:05:18 +0100 | [diff] [blame] | 564 | #define tcf_exts_first_act(ext) \ |
| 565 | list_first_entry_or_null(&(exts)->actions, \ |
| 566 | struct tc_action, list) |
WANG Cong | 33be627 | 2013-12-15 20:15:05 -0800 | [diff] [blame] | 567 | |
WANG Cong | 5da57f4 | 2013-12-15 20:15:07 -0800 | [diff] [blame] | 568 | int tcf_exts_dump(struct sk_buff *skb, struct tcf_exts *exts) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 569 | { |
| 570 | #ifdef CONFIG_NET_CLS_ACT |
Cong Wang | 9cc63db | 2014-07-16 14:25:30 -0700 | [diff] [blame] | 571 | struct nlattr *nest; |
| 572 | |
WANG Cong | 5da57f4 | 2013-12-15 20:15:07 -0800 | [diff] [blame] | 573 | if (exts->action && !list_empty(&exts->actions)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 574 | /* |
| 575 | * again for backward compatible mode - we want |
| 576 | * to work with both old and new modes of entering |
| 577 | * tc data even if iproute2 was newer - jhs |
| 578 | */ |
WANG Cong | 33be627 | 2013-12-15 20:15:05 -0800 | [diff] [blame] | 579 | if (exts->type != TCA_OLD_COMPAT) { |
WANG Cong | 5da57f4 | 2013-12-15 20:15:07 -0800 | [diff] [blame] | 580 | nest = nla_nest_start(skb, exts->action); |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 581 | if (nest == NULL) |
| 582 | goto nla_put_failure; |
WANG Cong | 33be627 | 2013-12-15 20:15:05 -0800 | [diff] [blame] | 583 | if (tcf_action_dump(skb, &exts->actions, 0, 0) < 0) |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 584 | goto nla_put_failure; |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 585 | nla_nest_end(skb, nest); |
WANG Cong | 5da57f4 | 2013-12-15 20:15:07 -0800 | [diff] [blame] | 586 | } else if (exts->police) { |
WANG Cong | 33be627 | 2013-12-15 20:15:05 -0800 | [diff] [blame] | 587 | struct tc_action *act = tcf_exts_first_act(exts); |
WANG Cong | 5da57f4 | 2013-12-15 20:15:07 -0800 | [diff] [blame] | 588 | nest = nla_nest_start(skb, exts->police); |
Jamal Hadi Salim | 63acd68 | 2013-12-23 08:02:12 -0500 | [diff] [blame] | 589 | if (nest == NULL || !act) |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 590 | goto nla_put_failure; |
WANG Cong | 33be627 | 2013-12-15 20:15:05 -0800 | [diff] [blame] | 591 | if (tcf_action_dump_old(skb, act, 0, 0) < 0) |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 592 | goto nla_put_failure; |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 593 | nla_nest_end(skb, nest); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 594 | } |
| 595 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 596 | return 0; |
Cong Wang | 9cc63db | 2014-07-16 14:25:30 -0700 | [diff] [blame] | 597 | |
| 598 | nla_put_failure: |
| 599 | nla_nest_cancel(skb, nest); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 600 | return -1; |
Cong Wang | 9cc63db | 2014-07-16 14:25:30 -0700 | [diff] [blame] | 601 | #else |
| 602 | return 0; |
| 603 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 604 | } |
Stephen Hemminger | aa767bf | 2008-01-21 02:26:41 -0800 | [diff] [blame] | 605 | EXPORT_SYMBOL(tcf_exts_dump); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 606 | |
Stephen Hemminger | aa767bf | 2008-01-21 02:26:41 -0800 | [diff] [blame] | 607 | |
WANG Cong | 5da57f4 | 2013-12-15 20:15:07 -0800 | [diff] [blame] | 608 | int tcf_exts_dump_stats(struct sk_buff *skb, struct tcf_exts *exts) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 609 | { |
| 610 | #ifdef CONFIG_NET_CLS_ACT |
WANG Cong | 33be627 | 2013-12-15 20:15:05 -0800 | [diff] [blame] | 611 | struct tc_action *a = tcf_exts_first_act(exts); |
Ignacy Gawędzki | b057df2 | 2015-02-03 19:05:18 +0100 | [diff] [blame] | 612 | if (a != NULL && tcf_action_copy_stats(skb, a, 1) < 0) |
WANG Cong | 33be627 | 2013-12-15 20:15:05 -0800 | [diff] [blame] | 613 | return -1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 614 | #endif |
| 615 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 616 | } |
Stephen Hemminger | aa767bf | 2008-01-21 02:26:41 -0800 | [diff] [blame] | 617 | EXPORT_SYMBOL(tcf_exts_dump_stats); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 618 | |
| 619 | static int __init tc_filter_init(void) |
| 620 | { |
Greg Rose | c7ac867 | 2011-06-10 01:27:09 +0000 | [diff] [blame] | 621 | rtnl_register(PF_UNSPEC, RTM_NEWTFILTER, tc_ctl_tfilter, NULL, NULL); |
| 622 | rtnl_register(PF_UNSPEC, RTM_DELTFILTER, tc_ctl_tfilter, NULL, NULL); |
Thomas Graf | 82623c0 | 2007-03-22 11:56:22 -0700 | [diff] [blame] | 623 | rtnl_register(PF_UNSPEC, RTM_GETTFILTER, tc_ctl_tfilter, |
Greg Rose | c7ac867 | 2011-06-10 01:27:09 +0000 | [diff] [blame] | 624 | tc_dump_tfilter, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 625 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 626 | return 0; |
| 627 | } |
| 628 | |
| 629 | subsys_initcall(tc_filter_init); |