Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * net/sched/sch_api.c Packet scheduler 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 | * Fixes: |
| 12 | * |
| 13 | * Rani Assaf <rani@magic.metawire.com> :980802: JIFFIES and CPU clock sources are repaired. |
| 14 | * Eduardo J. Blanco <ejbs@netlabs.com.uy> :990222: kmod support |
| 15 | * Jamal Hadi Salim <hadi@nortelnetworks.com>: 990601: ingress support |
| 16 | */ |
| 17 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | #include <linux/module.h> |
| 19 | #include <linux/types.h> |
| 20 | #include <linux/kernel.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 21 | #include <linux/string.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | #include <linux/errno.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 23 | #include <linux/skbuff.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | #include <linux/init.h> |
| 25 | #include <linux/proc_fs.h> |
| 26 | #include <linux/seq_file.h> |
| 27 | #include <linux/kmod.h> |
| 28 | #include <linux/list.h> |
Patrick McHardy | 4179477 | 2007-03-16 01:19:15 -0700 | [diff] [blame] | 29 | #include <linux/hrtimer.h> |
Jarek Poplawski | 25bfcd5 | 2008-08-18 20:53:34 -0700 | [diff] [blame] | 30 | #include <linux/lockdep.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 31 | #include <linux/slab.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | |
Eric W. Biederman | 457c4cb | 2007-09-12 12:01:34 +0200 | [diff] [blame] | 33 | #include <net/net_namespace.h> |
Denis V. Lunev | b854272 | 2007-12-01 00:21:31 +1100 | [diff] [blame] | 34 | #include <net/sock.h> |
Arnaldo Carvalho de Melo | dc5fc57 | 2007-03-25 23:06:12 -0700 | [diff] [blame] | 35 | #include <net/netlink.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | #include <net/pkt_sched.h> |
| 37 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | static int qdisc_notify(struct sk_buff *oskb, struct nlmsghdr *n, u32 clid, |
| 39 | struct Qdisc *old, struct Qdisc *new); |
| 40 | static int tclass_notify(struct sk_buff *oskb, struct nlmsghdr *n, |
| 41 | struct Qdisc *q, unsigned long cl, int event); |
| 42 | |
| 43 | /* |
| 44 | |
| 45 | Short review. |
| 46 | ------------- |
| 47 | |
| 48 | This file consists of two interrelated parts: |
| 49 | |
| 50 | 1. queueing disciplines manager frontend. |
| 51 | 2. traffic classes manager frontend. |
| 52 | |
| 53 | Generally, queueing discipline ("qdisc") is a black box, |
| 54 | which is able to enqueue packets and to dequeue them (when |
| 55 | device is ready to send something) in order and at times |
| 56 | determined by algorithm hidden in it. |
| 57 | |
| 58 | qdisc's are divided to two categories: |
| 59 | - "queues", which have no internal structure visible from outside. |
| 60 | - "schedulers", which split all the packets to "traffic classes", |
| 61 | using "packet classifiers" (look at cls_api.c) |
| 62 | |
| 63 | In turn, classes may have child qdiscs (as rule, queues) |
| 64 | attached to them etc. etc. etc. |
| 65 | |
| 66 | The goal of the routines in this file is to translate |
| 67 | information supplied by user in the form of handles |
| 68 | to more intelligible for kernel form, to make some sanity |
| 69 | checks and part of work, which is common to all qdiscs |
| 70 | and to provide rtnetlink notifications. |
| 71 | |
| 72 | All real intelligent work is done inside qdisc modules. |
| 73 | |
| 74 | |
| 75 | |
| 76 | Every discipline has two major routines: enqueue and dequeue. |
| 77 | |
| 78 | ---dequeue |
| 79 | |
| 80 | dequeue usually returns a skb to send. It is allowed to return NULL, |
| 81 | but it does not mean that queue is empty, it just means that |
| 82 | discipline does not want to send anything this time. |
| 83 | Queue is really empty if q->q.qlen == 0. |
| 84 | For complicated disciplines with multiple queues q->q is not |
| 85 | real packet queue, but however q->q.qlen must be valid. |
| 86 | |
| 87 | ---enqueue |
| 88 | |
| 89 | enqueue returns 0, if packet was enqueued successfully. |
| 90 | If packet (this one or another one) was dropped, it returns |
| 91 | not zero error code. |
| 92 | NET_XMIT_DROP - this packet dropped |
| 93 | Expected action: do not backoff, but wait until queue will clear. |
| 94 | NET_XMIT_CN - probably this packet enqueued, but another one dropped. |
| 95 | Expected action: backoff or ignore |
| 96 | NET_XMIT_POLICED - dropped by police. |
| 97 | Expected action: backoff or error to real-time apps. |
| 98 | |
| 99 | Auxiliary routines: |
| 100 | |
Jarek Poplawski | 99c0db2 | 2008-10-31 00:45:27 -0700 | [diff] [blame] | 101 | ---peek |
| 102 | |
| 103 | like dequeue but without removing a packet from the queue |
| 104 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 105 | ---reset |
| 106 | |
| 107 | returns qdisc to initial state: purge all buffers, clear all |
| 108 | timers, counters (except for statistics) etc. |
| 109 | |
| 110 | ---init |
| 111 | |
| 112 | initializes newly created qdisc. |
| 113 | |
| 114 | ---destroy |
| 115 | |
| 116 | destroys resources allocated by init and during lifetime of qdisc. |
| 117 | |
| 118 | ---change |
| 119 | |
| 120 | changes qdisc parameters. |
| 121 | */ |
| 122 | |
| 123 | /* Protects list of registered TC modules. It is pure SMP lock. */ |
| 124 | static DEFINE_RWLOCK(qdisc_mod_lock); |
| 125 | |
| 126 | |
| 127 | /************************************************ |
| 128 | * Queueing disciplines manipulation. * |
| 129 | ************************************************/ |
| 130 | |
| 131 | |
| 132 | /* The list of all installed queueing disciplines. */ |
| 133 | |
| 134 | static struct Qdisc_ops *qdisc_base; |
| 135 | |
| 136 | /* Register/uregister queueing discipline */ |
| 137 | |
| 138 | int register_qdisc(struct Qdisc_ops *qops) |
| 139 | { |
| 140 | struct Qdisc_ops *q, **qp; |
| 141 | int rc = -EEXIST; |
| 142 | |
| 143 | write_lock(&qdisc_mod_lock); |
| 144 | for (qp = &qdisc_base; (q = *qp) != NULL; qp = &q->next) |
| 145 | if (!strcmp(qops->id, q->id)) |
| 146 | goto out; |
| 147 | |
| 148 | if (qops->enqueue == NULL) |
| 149 | qops->enqueue = noop_qdisc_ops.enqueue; |
Jarek Poplawski | 99c0db2 | 2008-10-31 00:45:27 -0700 | [diff] [blame] | 150 | if (qops->peek == NULL) { |
| 151 | if (qops->dequeue == NULL) { |
| 152 | qops->peek = noop_qdisc_ops.peek; |
| 153 | } else { |
| 154 | rc = -EINVAL; |
| 155 | goto out; |
| 156 | } |
| 157 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 158 | if (qops->dequeue == NULL) |
| 159 | qops->dequeue = noop_qdisc_ops.dequeue; |
| 160 | |
| 161 | qops->next = NULL; |
| 162 | *qp = qops; |
| 163 | rc = 0; |
| 164 | out: |
| 165 | write_unlock(&qdisc_mod_lock); |
| 166 | return rc; |
| 167 | } |
Patrick McHardy | 62e3ba1 | 2008-01-22 22:10:23 -0800 | [diff] [blame] | 168 | EXPORT_SYMBOL(register_qdisc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 169 | |
| 170 | int unregister_qdisc(struct Qdisc_ops *qops) |
| 171 | { |
| 172 | struct Qdisc_ops *q, **qp; |
| 173 | int err = -ENOENT; |
| 174 | |
| 175 | write_lock(&qdisc_mod_lock); |
| 176 | for (qp = &qdisc_base; (q=*qp)!=NULL; qp = &q->next) |
| 177 | if (q == qops) |
| 178 | break; |
| 179 | if (q) { |
| 180 | *qp = q->next; |
| 181 | q->next = NULL; |
| 182 | err = 0; |
| 183 | } |
| 184 | write_unlock(&qdisc_mod_lock); |
| 185 | return err; |
| 186 | } |
Patrick McHardy | 62e3ba1 | 2008-01-22 22:10:23 -0800 | [diff] [blame] | 187 | EXPORT_SYMBOL(unregister_qdisc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 188 | |
| 189 | /* We know handle. Find qdisc among all qdisc's attached to device |
| 190 | (root qdisc, all its children, children of children etc.) |
| 191 | */ |
| 192 | |
Hannes Eder | 6113b74 | 2008-11-28 03:06:46 -0800 | [diff] [blame] | 193 | static struct Qdisc *qdisc_match_from_root(struct Qdisc *root, u32 handle) |
David S. Miller | 8123b42 | 2008-08-08 23:23:39 -0700 | [diff] [blame] | 194 | { |
| 195 | struct Qdisc *q; |
| 196 | |
| 197 | if (!(root->flags & TCQ_F_BUILTIN) && |
| 198 | root->handle == handle) |
| 199 | return root; |
| 200 | |
| 201 | list_for_each_entry(q, &root->list, list) { |
| 202 | if (q->handle == handle) |
| 203 | return q; |
| 204 | } |
| 205 | return NULL; |
| 206 | } |
| 207 | |
Jarek Poplawski | f6e0b23 | 2008-08-22 03:24:05 -0700 | [diff] [blame] | 208 | static void qdisc_list_add(struct Qdisc *q) |
| 209 | { |
Jarek Poplawski | f6486d4 | 2008-11-25 13:56:06 -0800 | [diff] [blame] | 210 | if ((q->parent != TC_H_ROOT) && !(q->flags & TCQ_F_INGRESS)) |
Patrick McHardy | af356af | 2009-09-04 06:41:18 +0000 | [diff] [blame] | 211 | list_add_tail(&q->list, &qdisc_dev(q)->qdisc->list); |
Jarek Poplawski | f6e0b23 | 2008-08-22 03:24:05 -0700 | [diff] [blame] | 212 | } |
| 213 | |
| 214 | void qdisc_list_del(struct Qdisc *q) |
| 215 | { |
Jarek Poplawski | f6486d4 | 2008-11-25 13:56:06 -0800 | [diff] [blame] | 216 | if ((q->parent != TC_H_ROOT) && !(q->flags & TCQ_F_INGRESS)) |
Jarek Poplawski | f6e0b23 | 2008-08-22 03:24:05 -0700 | [diff] [blame] | 217 | list_del(&q->list); |
Jarek Poplawski | f6e0b23 | 2008-08-22 03:24:05 -0700 | [diff] [blame] | 218 | } |
| 219 | EXPORT_SYMBOL(qdisc_list_del); |
| 220 | |
David S. Miller | ead81cc | 2008-07-17 00:50:32 -0700 | [diff] [blame] | 221 | struct Qdisc *qdisc_lookup(struct net_device *dev, u32 handle) |
Patrick McHardy | 43effa1 | 2006-11-29 17:35:48 -0800 | [diff] [blame] | 222 | { |
Jarek Poplawski | f6e0b23 | 2008-08-22 03:24:05 -0700 | [diff] [blame] | 223 | struct Qdisc *q; |
| 224 | |
Patrick McHardy | af356af | 2009-09-04 06:41:18 +0000 | [diff] [blame] | 225 | q = qdisc_match_from_root(dev->qdisc, handle); |
| 226 | if (q) |
| 227 | goto out; |
Jarek Poplawski | f6e0b23 | 2008-08-22 03:24:05 -0700 | [diff] [blame] | 228 | |
| 229 | q = qdisc_match_from_root(dev->rx_queue.qdisc_sleeping, handle); |
Jarek Poplawski | f6486d4 | 2008-11-25 13:56:06 -0800 | [diff] [blame] | 230 | out: |
Jarek Poplawski | f6e0b23 | 2008-08-22 03:24:05 -0700 | [diff] [blame] | 231 | return q; |
Patrick McHardy | 43effa1 | 2006-11-29 17:35:48 -0800 | [diff] [blame] | 232 | } |
| 233 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 234 | static struct Qdisc *qdisc_leaf(struct Qdisc *p, u32 classid) |
| 235 | { |
| 236 | unsigned long cl; |
| 237 | struct Qdisc *leaf; |
Eric Dumazet | 20fea08 | 2007-11-14 01:44:41 -0800 | [diff] [blame] | 238 | const struct Qdisc_class_ops *cops = p->ops->cl_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 239 | |
| 240 | if (cops == NULL) |
| 241 | return NULL; |
| 242 | cl = cops->get(p, classid); |
| 243 | |
| 244 | if (cl == 0) |
| 245 | return NULL; |
| 246 | leaf = cops->leaf(p, cl); |
| 247 | cops->put(p, cl); |
| 248 | return leaf; |
| 249 | } |
| 250 | |
| 251 | /* Find queueing discipline by name */ |
| 252 | |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 253 | static struct Qdisc_ops *qdisc_lookup_ops(struct nlattr *kind) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 254 | { |
| 255 | struct Qdisc_ops *q = NULL; |
| 256 | |
| 257 | if (kind) { |
| 258 | read_lock(&qdisc_mod_lock); |
| 259 | for (q = qdisc_base; q; q = q->next) { |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 260 | if (nla_strcmp(kind, q->id) == 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 261 | if (!try_module_get(q->owner)) |
| 262 | q = NULL; |
| 263 | break; |
| 264 | } |
| 265 | } |
| 266 | read_unlock(&qdisc_mod_lock); |
| 267 | } |
| 268 | return q; |
| 269 | } |
| 270 | |
| 271 | static struct qdisc_rate_table *qdisc_rtab_list; |
| 272 | |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 273 | struct qdisc_rate_table *qdisc_get_rtab(struct tc_ratespec *r, struct nlattr *tab) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 274 | { |
| 275 | struct qdisc_rate_table *rtab; |
| 276 | |
| 277 | for (rtab = qdisc_rtab_list; rtab; rtab = rtab->next) { |
| 278 | if (memcmp(&rtab->rate, r, sizeof(struct tc_ratespec)) == 0) { |
| 279 | rtab->refcnt++; |
| 280 | return rtab; |
| 281 | } |
| 282 | } |
| 283 | |
Patrick McHardy | 5feb5e1 | 2008-01-23 20:35:19 -0800 | [diff] [blame] | 284 | if (tab == NULL || r->rate == 0 || r->cell_log == 0 || |
| 285 | nla_len(tab) != TC_RTAB_SIZE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 286 | return NULL; |
| 287 | |
| 288 | rtab = kmalloc(sizeof(*rtab), GFP_KERNEL); |
| 289 | if (rtab) { |
| 290 | rtab->rate = *r; |
| 291 | rtab->refcnt = 1; |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 292 | memcpy(rtab->data, nla_data(tab), 1024); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 293 | rtab->next = qdisc_rtab_list; |
| 294 | qdisc_rtab_list = rtab; |
| 295 | } |
| 296 | return rtab; |
| 297 | } |
Patrick McHardy | 62e3ba1 | 2008-01-22 22:10:23 -0800 | [diff] [blame] | 298 | EXPORT_SYMBOL(qdisc_get_rtab); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 299 | |
| 300 | void qdisc_put_rtab(struct qdisc_rate_table *tab) |
| 301 | { |
| 302 | struct qdisc_rate_table *rtab, **rtabp; |
| 303 | |
| 304 | if (!tab || --tab->refcnt) |
| 305 | return; |
| 306 | |
| 307 | for (rtabp = &qdisc_rtab_list; (rtab=*rtabp) != NULL; rtabp = &rtab->next) { |
| 308 | if (rtab == tab) { |
| 309 | *rtabp = rtab->next; |
| 310 | kfree(rtab); |
| 311 | return; |
| 312 | } |
| 313 | } |
| 314 | } |
Patrick McHardy | 62e3ba1 | 2008-01-22 22:10:23 -0800 | [diff] [blame] | 315 | EXPORT_SYMBOL(qdisc_put_rtab); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 316 | |
Jussi Kivilinna | 175f9c1 | 2008-07-20 00:08:47 -0700 | [diff] [blame] | 317 | static LIST_HEAD(qdisc_stab_list); |
| 318 | static DEFINE_SPINLOCK(qdisc_stab_lock); |
| 319 | |
| 320 | static const struct nla_policy stab_policy[TCA_STAB_MAX + 1] = { |
| 321 | [TCA_STAB_BASE] = { .len = sizeof(struct tc_sizespec) }, |
| 322 | [TCA_STAB_DATA] = { .type = NLA_BINARY }, |
| 323 | }; |
| 324 | |
| 325 | static struct qdisc_size_table *qdisc_get_stab(struct nlattr *opt) |
| 326 | { |
| 327 | struct nlattr *tb[TCA_STAB_MAX + 1]; |
| 328 | struct qdisc_size_table *stab; |
| 329 | struct tc_sizespec *s; |
| 330 | unsigned int tsize = 0; |
| 331 | u16 *tab = NULL; |
| 332 | int err; |
| 333 | |
| 334 | err = nla_parse_nested(tb, TCA_STAB_MAX, opt, stab_policy); |
| 335 | if (err < 0) |
| 336 | return ERR_PTR(err); |
| 337 | if (!tb[TCA_STAB_BASE]) |
| 338 | return ERR_PTR(-EINVAL); |
| 339 | |
| 340 | s = nla_data(tb[TCA_STAB_BASE]); |
| 341 | |
| 342 | if (s->tsize > 0) { |
| 343 | if (!tb[TCA_STAB_DATA]) |
| 344 | return ERR_PTR(-EINVAL); |
| 345 | tab = nla_data(tb[TCA_STAB_DATA]); |
| 346 | tsize = nla_len(tb[TCA_STAB_DATA]) / sizeof(u16); |
| 347 | } |
| 348 | |
| 349 | if (!s || tsize != s->tsize || (!tab && tsize > 0)) |
| 350 | return ERR_PTR(-EINVAL); |
| 351 | |
David S. Miller | f3b9605 | 2008-08-18 22:33:05 -0700 | [diff] [blame] | 352 | spin_lock(&qdisc_stab_lock); |
Jussi Kivilinna | 175f9c1 | 2008-07-20 00:08:47 -0700 | [diff] [blame] | 353 | |
| 354 | list_for_each_entry(stab, &qdisc_stab_list, list) { |
| 355 | if (memcmp(&stab->szopts, s, sizeof(*s))) |
| 356 | continue; |
| 357 | if (tsize > 0 && memcmp(stab->data, tab, tsize * sizeof(u16))) |
| 358 | continue; |
| 359 | stab->refcnt++; |
David S. Miller | f3b9605 | 2008-08-18 22:33:05 -0700 | [diff] [blame] | 360 | spin_unlock(&qdisc_stab_lock); |
Jussi Kivilinna | 175f9c1 | 2008-07-20 00:08:47 -0700 | [diff] [blame] | 361 | return stab; |
| 362 | } |
| 363 | |
David S. Miller | f3b9605 | 2008-08-18 22:33:05 -0700 | [diff] [blame] | 364 | spin_unlock(&qdisc_stab_lock); |
Jussi Kivilinna | 175f9c1 | 2008-07-20 00:08:47 -0700 | [diff] [blame] | 365 | |
| 366 | stab = kmalloc(sizeof(*stab) + tsize * sizeof(u16), GFP_KERNEL); |
| 367 | if (!stab) |
| 368 | return ERR_PTR(-ENOMEM); |
| 369 | |
| 370 | stab->refcnt = 1; |
| 371 | stab->szopts = *s; |
| 372 | if (tsize > 0) |
| 373 | memcpy(stab->data, tab, tsize * sizeof(u16)); |
| 374 | |
David S. Miller | f3b9605 | 2008-08-18 22:33:05 -0700 | [diff] [blame] | 375 | spin_lock(&qdisc_stab_lock); |
Jussi Kivilinna | 175f9c1 | 2008-07-20 00:08:47 -0700 | [diff] [blame] | 376 | list_add_tail(&stab->list, &qdisc_stab_list); |
David S. Miller | f3b9605 | 2008-08-18 22:33:05 -0700 | [diff] [blame] | 377 | spin_unlock(&qdisc_stab_lock); |
Jussi Kivilinna | 175f9c1 | 2008-07-20 00:08:47 -0700 | [diff] [blame] | 378 | |
| 379 | return stab; |
| 380 | } |
| 381 | |
| 382 | void qdisc_put_stab(struct qdisc_size_table *tab) |
| 383 | { |
| 384 | if (!tab) |
| 385 | return; |
| 386 | |
David S. Miller | f3b9605 | 2008-08-18 22:33:05 -0700 | [diff] [blame] | 387 | spin_lock(&qdisc_stab_lock); |
Jussi Kivilinna | 175f9c1 | 2008-07-20 00:08:47 -0700 | [diff] [blame] | 388 | |
| 389 | if (--tab->refcnt == 0) { |
| 390 | list_del(&tab->list); |
| 391 | kfree(tab); |
| 392 | } |
| 393 | |
David S. Miller | f3b9605 | 2008-08-18 22:33:05 -0700 | [diff] [blame] | 394 | spin_unlock(&qdisc_stab_lock); |
Jussi Kivilinna | 175f9c1 | 2008-07-20 00:08:47 -0700 | [diff] [blame] | 395 | } |
| 396 | EXPORT_SYMBOL(qdisc_put_stab); |
| 397 | |
| 398 | static int qdisc_dump_stab(struct sk_buff *skb, struct qdisc_size_table *stab) |
| 399 | { |
| 400 | struct nlattr *nest; |
| 401 | |
| 402 | nest = nla_nest_start(skb, TCA_STAB); |
Patrick McHardy | 3aa4614 | 2008-11-20 04:07:14 -0800 | [diff] [blame] | 403 | if (nest == NULL) |
| 404 | goto nla_put_failure; |
Jussi Kivilinna | 175f9c1 | 2008-07-20 00:08:47 -0700 | [diff] [blame] | 405 | NLA_PUT(skb, TCA_STAB_BASE, sizeof(stab->szopts), &stab->szopts); |
| 406 | nla_nest_end(skb, nest); |
| 407 | |
| 408 | return skb->len; |
| 409 | |
| 410 | nla_put_failure: |
| 411 | return -1; |
| 412 | } |
| 413 | |
| 414 | void qdisc_calculate_pkt_len(struct sk_buff *skb, struct qdisc_size_table *stab) |
| 415 | { |
| 416 | int pkt_len, slot; |
| 417 | |
| 418 | pkt_len = skb->len + stab->szopts.overhead; |
| 419 | if (unlikely(!stab->szopts.tsize)) |
| 420 | goto out; |
| 421 | |
| 422 | slot = pkt_len + stab->szopts.cell_align; |
| 423 | if (unlikely(slot < 0)) |
| 424 | slot = 0; |
| 425 | |
| 426 | slot >>= stab->szopts.cell_log; |
| 427 | if (likely(slot < stab->szopts.tsize)) |
| 428 | pkt_len = stab->data[slot]; |
| 429 | else |
| 430 | pkt_len = stab->data[stab->szopts.tsize - 1] * |
| 431 | (slot / stab->szopts.tsize) + |
| 432 | stab->data[slot % stab->szopts.tsize]; |
| 433 | |
| 434 | pkt_len <<= stab->szopts.size_log; |
| 435 | out: |
| 436 | if (unlikely(pkt_len < 1)) |
| 437 | pkt_len = 1; |
| 438 | qdisc_skb_cb(skb)->pkt_len = pkt_len; |
| 439 | } |
| 440 | EXPORT_SYMBOL(qdisc_calculate_pkt_len); |
| 441 | |
Jarek Poplawski | b00355d | 2009-02-01 01:12:42 -0800 | [diff] [blame] | 442 | void qdisc_warn_nonwc(char *txt, struct Qdisc *qdisc) |
| 443 | { |
| 444 | if (!(qdisc->flags & TCQ_F_WARN_NONWC)) { |
| 445 | printk(KERN_WARNING |
| 446 | "%s: %s qdisc %X: is non-work-conserving?\n", |
| 447 | txt, qdisc->ops->id, qdisc->handle >> 16); |
| 448 | qdisc->flags |= TCQ_F_WARN_NONWC; |
| 449 | } |
| 450 | } |
| 451 | EXPORT_SYMBOL(qdisc_warn_nonwc); |
| 452 | |
Patrick McHardy | 4179477 | 2007-03-16 01:19:15 -0700 | [diff] [blame] | 453 | static enum hrtimer_restart qdisc_watchdog(struct hrtimer *timer) |
| 454 | { |
| 455 | struct qdisc_watchdog *wd = container_of(timer, struct qdisc_watchdog, |
David S. Miller | 2fbd3da | 2009-09-01 17:59:25 -0700 | [diff] [blame] | 456 | timer); |
Patrick McHardy | 4179477 | 2007-03-16 01:19:15 -0700 | [diff] [blame] | 457 | |
| 458 | wd->qdisc->flags &= ~TCQ_F_THROTTLED; |
David S. Miller | 8608db0 | 2008-08-18 20:51:18 -0700 | [diff] [blame] | 459 | __netif_schedule(qdisc_root(wd->qdisc)); |
Stephen Hemminger | 1936502 | 2007-03-22 12:18:35 -0700 | [diff] [blame] | 460 | |
Patrick McHardy | 4179477 | 2007-03-16 01:19:15 -0700 | [diff] [blame] | 461 | return HRTIMER_NORESTART; |
| 462 | } |
| 463 | |
| 464 | void qdisc_watchdog_init(struct qdisc_watchdog *wd, struct Qdisc *qdisc) |
| 465 | { |
David S. Miller | 2fbd3da | 2009-09-01 17:59:25 -0700 | [diff] [blame] | 466 | hrtimer_init(&wd->timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS); |
| 467 | wd->timer.function = qdisc_watchdog; |
Patrick McHardy | 4179477 | 2007-03-16 01:19:15 -0700 | [diff] [blame] | 468 | wd->qdisc = qdisc; |
| 469 | } |
| 470 | EXPORT_SYMBOL(qdisc_watchdog_init); |
| 471 | |
| 472 | void qdisc_watchdog_schedule(struct qdisc_watchdog *wd, psched_time_t expires) |
| 473 | { |
| 474 | ktime_t time; |
| 475 | |
Jarek Poplawski | 2540e05 | 2008-08-21 05:11:14 -0700 | [diff] [blame] | 476 | if (test_bit(__QDISC_STATE_DEACTIVATED, |
| 477 | &qdisc_root_sleeping(wd->qdisc)->state)) |
| 478 | return; |
| 479 | |
Patrick McHardy | 4179477 | 2007-03-16 01:19:15 -0700 | [diff] [blame] | 480 | wd->qdisc->flags |= TCQ_F_THROTTLED; |
| 481 | time = ktime_set(0, 0); |
Jarek Poplawski | ca44d6e | 2009-06-15 02:31:47 -0700 | [diff] [blame] | 482 | time = ktime_add_ns(time, PSCHED_TICKS2NS(expires)); |
David S. Miller | 2fbd3da | 2009-09-01 17:59:25 -0700 | [diff] [blame] | 483 | hrtimer_start(&wd->timer, time, HRTIMER_MODE_ABS); |
Patrick McHardy | 4179477 | 2007-03-16 01:19:15 -0700 | [diff] [blame] | 484 | } |
| 485 | EXPORT_SYMBOL(qdisc_watchdog_schedule); |
| 486 | |
| 487 | void qdisc_watchdog_cancel(struct qdisc_watchdog *wd) |
| 488 | { |
David S. Miller | 2fbd3da | 2009-09-01 17:59:25 -0700 | [diff] [blame] | 489 | hrtimer_cancel(&wd->timer); |
Patrick McHardy | 4179477 | 2007-03-16 01:19:15 -0700 | [diff] [blame] | 490 | wd->qdisc->flags &= ~TCQ_F_THROTTLED; |
| 491 | } |
| 492 | EXPORT_SYMBOL(qdisc_watchdog_cancel); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 493 | |
Adrian Bunk | a94f779 | 2008-07-22 14:20:11 -0700 | [diff] [blame] | 494 | static struct hlist_head *qdisc_class_hash_alloc(unsigned int n) |
Patrick McHardy | 6fe1c7a | 2008-07-05 23:21:31 -0700 | [diff] [blame] | 495 | { |
| 496 | unsigned int size = n * sizeof(struct hlist_head), i; |
| 497 | struct hlist_head *h; |
| 498 | |
| 499 | if (size <= PAGE_SIZE) |
| 500 | h = kmalloc(size, GFP_KERNEL); |
| 501 | else |
| 502 | h = (struct hlist_head *) |
| 503 | __get_free_pages(GFP_KERNEL, get_order(size)); |
| 504 | |
| 505 | if (h != NULL) { |
| 506 | for (i = 0; i < n; i++) |
| 507 | INIT_HLIST_HEAD(&h[i]); |
| 508 | } |
| 509 | return h; |
| 510 | } |
| 511 | |
| 512 | static void qdisc_class_hash_free(struct hlist_head *h, unsigned int n) |
| 513 | { |
| 514 | unsigned int size = n * sizeof(struct hlist_head); |
| 515 | |
| 516 | if (size <= PAGE_SIZE) |
| 517 | kfree(h); |
| 518 | else |
| 519 | free_pages((unsigned long)h, get_order(size)); |
| 520 | } |
| 521 | |
| 522 | void qdisc_class_hash_grow(struct Qdisc *sch, struct Qdisc_class_hash *clhash) |
| 523 | { |
| 524 | struct Qdisc_class_common *cl; |
| 525 | struct hlist_node *n, *next; |
| 526 | struct hlist_head *nhash, *ohash; |
| 527 | unsigned int nsize, nmask, osize; |
| 528 | unsigned int i, h; |
| 529 | |
| 530 | /* Rehash when load factor exceeds 0.75 */ |
| 531 | if (clhash->hashelems * 4 <= clhash->hashsize * 3) |
| 532 | return; |
| 533 | nsize = clhash->hashsize * 2; |
| 534 | nmask = nsize - 1; |
| 535 | nhash = qdisc_class_hash_alloc(nsize); |
| 536 | if (nhash == NULL) |
| 537 | return; |
| 538 | |
| 539 | ohash = clhash->hash; |
| 540 | osize = clhash->hashsize; |
| 541 | |
| 542 | sch_tree_lock(sch); |
| 543 | for (i = 0; i < osize; i++) { |
| 544 | hlist_for_each_entry_safe(cl, n, next, &ohash[i], hnode) { |
| 545 | h = qdisc_class_hash(cl->classid, nmask); |
| 546 | hlist_add_head(&cl->hnode, &nhash[h]); |
| 547 | } |
| 548 | } |
| 549 | clhash->hash = nhash; |
| 550 | clhash->hashsize = nsize; |
| 551 | clhash->hashmask = nmask; |
| 552 | sch_tree_unlock(sch); |
| 553 | |
| 554 | qdisc_class_hash_free(ohash, osize); |
| 555 | } |
| 556 | EXPORT_SYMBOL(qdisc_class_hash_grow); |
| 557 | |
| 558 | int qdisc_class_hash_init(struct Qdisc_class_hash *clhash) |
| 559 | { |
| 560 | unsigned int size = 4; |
| 561 | |
| 562 | clhash->hash = qdisc_class_hash_alloc(size); |
| 563 | if (clhash->hash == NULL) |
| 564 | return -ENOMEM; |
| 565 | clhash->hashsize = size; |
| 566 | clhash->hashmask = size - 1; |
| 567 | clhash->hashelems = 0; |
| 568 | return 0; |
| 569 | } |
| 570 | EXPORT_SYMBOL(qdisc_class_hash_init); |
| 571 | |
| 572 | void qdisc_class_hash_destroy(struct Qdisc_class_hash *clhash) |
| 573 | { |
| 574 | qdisc_class_hash_free(clhash->hash, clhash->hashsize); |
| 575 | } |
| 576 | EXPORT_SYMBOL(qdisc_class_hash_destroy); |
| 577 | |
| 578 | void qdisc_class_hash_insert(struct Qdisc_class_hash *clhash, |
| 579 | struct Qdisc_class_common *cl) |
| 580 | { |
| 581 | unsigned int h; |
| 582 | |
| 583 | INIT_HLIST_NODE(&cl->hnode); |
| 584 | h = qdisc_class_hash(cl->classid, clhash->hashmask); |
| 585 | hlist_add_head(&cl->hnode, &clhash->hash[h]); |
| 586 | clhash->hashelems++; |
| 587 | } |
| 588 | EXPORT_SYMBOL(qdisc_class_hash_insert); |
| 589 | |
| 590 | void qdisc_class_hash_remove(struct Qdisc_class_hash *clhash, |
| 591 | struct Qdisc_class_common *cl) |
| 592 | { |
| 593 | hlist_del(&cl->hnode); |
| 594 | clhash->hashelems--; |
| 595 | } |
| 596 | EXPORT_SYMBOL(qdisc_class_hash_remove); |
| 597 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 598 | /* Allocate an unique handle from space managed by kernel */ |
| 599 | |
| 600 | static u32 qdisc_alloc_handle(struct net_device *dev) |
| 601 | { |
| 602 | int i = 0x10000; |
| 603 | static u32 autohandle = TC_H_MAKE(0x80000000U, 0); |
| 604 | |
| 605 | do { |
| 606 | autohandle += TC_H_MAKE(0x10000U, 0); |
| 607 | if (autohandle == TC_H_MAKE(TC_H_ROOT, 0)) |
| 608 | autohandle = TC_H_MAKE(0x80000000U, 0); |
| 609 | } while (qdisc_lookup(dev, autohandle) && --i > 0); |
| 610 | |
| 611 | return i>0 ? autohandle : 0; |
| 612 | } |
| 613 | |
Patrick McHardy | 43effa1 | 2006-11-29 17:35:48 -0800 | [diff] [blame] | 614 | void qdisc_tree_decrease_qlen(struct Qdisc *sch, unsigned int n) |
| 615 | { |
Eric Dumazet | 20fea08 | 2007-11-14 01:44:41 -0800 | [diff] [blame] | 616 | const struct Qdisc_class_ops *cops; |
Patrick McHardy | 43effa1 | 2006-11-29 17:35:48 -0800 | [diff] [blame] | 617 | unsigned long cl; |
| 618 | u32 parentid; |
| 619 | |
| 620 | if (n == 0) |
| 621 | return; |
| 622 | while ((parentid = sch->parent)) { |
Jarek Poplawski | 066a3b5 | 2008-04-14 15:10:42 -0700 | [diff] [blame] | 623 | if (TC_H_MAJ(parentid) == TC_H_MAJ(TC_H_INGRESS)) |
| 624 | return; |
| 625 | |
David S. Miller | 5ce2d48 | 2008-07-08 17:06:30 -0700 | [diff] [blame] | 626 | sch = qdisc_lookup(qdisc_dev(sch), TC_H_MAJ(parentid)); |
Patrick McHardy | ffc8fef | 2007-07-30 17:11:50 -0700 | [diff] [blame] | 627 | if (sch == NULL) { |
| 628 | WARN_ON(parentid != TC_H_ROOT); |
| 629 | return; |
| 630 | } |
Patrick McHardy | 43effa1 | 2006-11-29 17:35:48 -0800 | [diff] [blame] | 631 | cops = sch->ops->cl_ops; |
| 632 | if (cops->qlen_notify) { |
| 633 | cl = cops->get(sch, parentid); |
| 634 | cops->qlen_notify(sch, cl); |
| 635 | cops->put(sch, cl); |
| 636 | } |
| 637 | sch->q.qlen -= n; |
| 638 | } |
| 639 | } |
| 640 | EXPORT_SYMBOL(qdisc_tree_decrease_qlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 641 | |
David S. Miller | 99194cf | 2008-07-17 04:54:10 -0700 | [diff] [blame] | 642 | static void notify_and_destroy(struct sk_buff *skb, struct nlmsghdr *n, u32 clid, |
| 643 | struct Qdisc *old, struct Qdisc *new) |
| 644 | { |
| 645 | if (new || old) |
| 646 | qdisc_notify(skb, n, clid, old, new); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 647 | |
David S. Miller | 4d8863a | 2008-08-18 21:03:15 -0700 | [diff] [blame] | 648 | if (old) |
David S. Miller | 99194cf | 2008-07-17 04:54:10 -0700 | [diff] [blame] | 649 | qdisc_destroy(old); |
David S. Miller | 99194cf | 2008-07-17 04:54:10 -0700 | [diff] [blame] | 650 | } |
| 651 | |
| 652 | /* Graft qdisc "new" to class "classid" of qdisc "parent" or |
| 653 | * to device "dev". |
| 654 | * |
| 655 | * When appropriate send a netlink notification using 'skb' |
| 656 | * and "n". |
| 657 | * |
| 658 | * On success, destroy old qdisc. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 659 | */ |
| 660 | |
| 661 | static int qdisc_graft(struct net_device *dev, struct Qdisc *parent, |
David S. Miller | 99194cf | 2008-07-17 04:54:10 -0700 | [diff] [blame] | 662 | struct sk_buff *skb, struct nlmsghdr *n, u32 classid, |
| 663 | struct Qdisc *new, struct Qdisc *old) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 664 | { |
David S. Miller | 99194cf | 2008-07-17 04:54:10 -0700 | [diff] [blame] | 665 | struct Qdisc *q = old; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 666 | int err = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 667 | |
YOSHIFUJI Hideaki | 10297b9 | 2007-02-09 23:25:16 +0900 | [diff] [blame] | 668 | if (parent == NULL) { |
David S. Miller | 99194cf | 2008-07-17 04:54:10 -0700 | [diff] [blame] | 669 | unsigned int i, num_q, ingress; |
| 670 | |
| 671 | ingress = 0; |
| 672 | num_q = dev->num_tx_queues; |
David S. Miller | 8d50b53 | 2008-07-30 02:37:46 -0700 | [diff] [blame] | 673 | if ((q && q->flags & TCQ_F_INGRESS) || |
| 674 | (new && new->flags & TCQ_F_INGRESS)) { |
David S. Miller | 99194cf | 2008-07-17 04:54:10 -0700 | [diff] [blame] | 675 | num_q = 1; |
| 676 | ingress = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 677 | } |
David S. Miller | 99194cf | 2008-07-17 04:54:10 -0700 | [diff] [blame] | 678 | |
| 679 | if (dev->flags & IFF_UP) |
| 680 | dev_deactivate(dev); |
| 681 | |
David S. Miller | 6ec1c69 | 2009-09-06 01:58:51 -0700 | [diff] [blame] | 682 | if (new && new->ops->attach) { |
| 683 | new->ops->attach(new); |
| 684 | num_q = 0; |
| 685 | } |
| 686 | |
David S. Miller | 99194cf | 2008-07-17 04:54:10 -0700 | [diff] [blame] | 687 | for (i = 0; i < num_q; i++) { |
| 688 | struct netdev_queue *dev_queue = &dev->rx_queue; |
| 689 | |
| 690 | if (!ingress) |
| 691 | dev_queue = netdev_get_tx_queue(dev, i); |
| 692 | |
David S. Miller | 8d50b53 | 2008-07-30 02:37:46 -0700 | [diff] [blame] | 693 | old = dev_graft_qdisc(dev_queue, new); |
| 694 | if (new && i > 0) |
| 695 | atomic_inc(&new->refcnt); |
| 696 | |
Jarek Poplawski | 036d6a6 | 2009-09-13 22:35:44 +0000 | [diff] [blame] | 697 | if (!ingress) |
| 698 | qdisc_destroy(old); |
David S. Miller | 99194cf | 2008-07-17 04:54:10 -0700 | [diff] [blame] | 699 | } |
| 700 | |
Jarek Poplawski | 036d6a6 | 2009-09-13 22:35:44 +0000 | [diff] [blame] | 701 | if (!ingress) { |
| 702 | notify_and_destroy(skb, n, classid, dev->qdisc, new); |
| 703 | if (new && !new->ops->attach) |
| 704 | atomic_inc(&new->refcnt); |
| 705 | dev->qdisc = new ? : &noop_qdisc; |
| 706 | } else { |
| 707 | notify_and_destroy(skb, n, classid, old, new); |
| 708 | } |
Patrick McHardy | af356af | 2009-09-04 06:41:18 +0000 | [diff] [blame] | 709 | |
David S. Miller | 99194cf | 2008-07-17 04:54:10 -0700 | [diff] [blame] | 710 | if (dev->flags & IFF_UP) |
| 711 | dev_activate(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 712 | } else { |
Eric Dumazet | 20fea08 | 2007-11-14 01:44:41 -0800 | [diff] [blame] | 713 | const struct Qdisc_class_ops *cops = parent->ops->cl_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 714 | |
Patrick McHardy | c9f1d03 | 2009-09-04 06:41:13 +0000 | [diff] [blame] | 715 | err = -EOPNOTSUPP; |
| 716 | if (cops && cops->graft) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 717 | unsigned long cl = cops->get(parent, classid); |
| 718 | if (cl) { |
David S. Miller | 99194cf | 2008-07-17 04:54:10 -0700 | [diff] [blame] | 719 | err = cops->graft(parent, cl, new, &old); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 720 | cops->put(parent, cl); |
Patrick McHardy | c9f1d03 | 2009-09-04 06:41:13 +0000 | [diff] [blame] | 721 | } else |
| 722 | err = -ENOENT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 723 | } |
David S. Miller | 99194cf | 2008-07-17 04:54:10 -0700 | [diff] [blame] | 724 | if (!err) |
| 725 | notify_and_destroy(skb, n, classid, old, new); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 726 | } |
| 727 | return err; |
| 728 | } |
| 729 | |
Jarek Poplawski | 25bfcd5 | 2008-08-18 20:53:34 -0700 | [diff] [blame] | 730 | /* lockdep annotation is needed for ingress; egress gets it only for name */ |
| 731 | static struct lock_class_key qdisc_tx_lock; |
| 732 | static struct lock_class_key qdisc_rx_lock; |
| 733 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 734 | /* |
| 735 | Allocate and initialize new qdisc. |
| 736 | |
| 737 | Parameters are passed via opt. |
| 738 | */ |
| 739 | |
| 740 | static struct Qdisc * |
David S. Miller | bb949fb | 2008-07-08 16:55:56 -0700 | [diff] [blame] | 741 | qdisc_create(struct net_device *dev, struct netdev_queue *dev_queue, |
Patrick McHardy | 23bcf63 | 2009-09-09 18:11:23 -0700 | [diff] [blame] | 742 | struct Qdisc *p, u32 parent, u32 handle, |
| 743 | struct nlattr **tca, int *errp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 744 | { |
| 745 | int err; |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 746 | struct nlattr *kind = tca[TCA_KIND]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 747 | struct Qdisc *sch; |
| 748 | struct Qdisc_ops *ops; |
Jussi Kivilinna | 175f9c1 | 2008-07-20 00:08:47 -0700 | [diff] [blame] | 749 | struct qdisc_size_table *stab; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 750 | |
| 751 | ops = qdisc_lookup_ops(kind); |
Johannes Berg | 95a5afc | 2008-10-16 15:24:51 -0700 | [diff] [blame] | 752 | #ifdef CONFIG_MODULES |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 753 | if (ops == NULL && kind != NULL) { |
| 754 | char name[IFNAMSIZ]; |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 755 | if (nla_strlcpy(name, kind, IFNAMSIZ) < IFNAMSIZ) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 756 | /* We dropped the RTNL semaphore in order to |
| 757 | * perform the module load. So, even if we |
| 758 | * succeeded in loading the module we have to |
| 759 | * tell the caller to replay the request. We |
| 760 | * indicate this using -EAGAIN. |
| 761 | * We replay the request because the device may |
| 762 | * go away in the mean time. |
| 763 | */ |
| 764 | rtnl_unlock(); |
| 765 | request_module("sch_%s", name); |
| 766 | rtnl_lock(); |
| 767 | ops = qdisc_lookup_ops(kind); |
| 768 | if (ops != NULL) { |
| 769 | /* We will try again qdisc_lookup_ops, |
| 770 | * so don't keep a reference. |
| 771 | */ |
| 772 | module_put(ops->owner); |
| 773 | err = -EAGAIN; |
| 774 | goto err_out; |
| 775 | } |
| 776 | } |
| 777 | } |
| 778 | #endif |
| 779 | |
Jamal Hadi Salim | b9e2cc0 | 2006-08-03 16:36:51 -0700 | [diff] [blame] | 780 | err = -ENOENT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 781 | if (ops == NULL) |
| 782 | goto err_out; |
| 783 | |
David S. Miller | 5ce2d48 | 2008-07-08 17:06:30 -0700 | [diff] [blame] | 784 | sch = qdisc_alloc(dev_queue, ops); |
Thomas Graf | 3d54b82 | 2005-07-05 14:15:09 -0700 | [diff] [blame] | 785 | if (IS_ERR(sch)) { |
| 786 | err = PTR_ERR(sch); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 787 | goto err_out2; |
Thomas Graf | 3d54b82 | 2005-07-05 14:15:09 -0700 | [diff] [blame] | 788 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 789 | |
Patrick McHardy | ffc8fef | 2007-07-30 17:11:50 -0700 | [diff] [blame] | 790 | sch->parent = parent; |
| 791 | |
Thomas Graf | 3d54b82 | 2005-07-05 14:15:09 -0700 | [diff] [blame] | 792 | if (handle == TC_H_INGRESS) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 793 | sch->flags |= TCQ_F_INGRESS; |
Thomas Graf | 3d54b82 | 2005-07-05 14:15:09 -0700 | [diff] [blame] | 794 | handle = TC_H_MAKE(TC_H_INGRESS, 0); |
Jarek Poplawski | 25bfcd5 | 2008-08-18 20:53:34 -0700 | [diff] [blame] | 795 | lockdep_set_class(qdisc_lock(sch), &qdisc_rx_lock); |
Patrick McHardy | fd44de7 | 2007-04-16 17:07:08 -0700 | [diff] [blame] | 796 | } else { |
Patrick McHardy | fd44de7 | 2007-04-16 17:07:08 -0700 | [diff] [blame] | 797 | if (handle == 0) { |
| 798 | handle = qdisc_alloc_handle(dev); |
| 799 | err = -ENOMEM; |
| 800 | if (handle == 0) |
| 801 | goto err_out3; |
| 802 | } |
Jarek Poplawski | 25bfcd5 | 2008-08-18 20:53:34 -0700 | [diff] [blame] | 803 | lockdep_set_class(qdisc_lock(sch), &qdisc_tx_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 804 | } |
| 805 | |
Thomas Graf | 3d54b82 | 2005-07-05 14:15:09 -0700 | [diff] [blame] | 806 | sch->handle = handle; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 807 | |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 808 | if (!ops->init || (err = ops->init(sch, tca[TCA_OPTIONS])) == 0) { |
Jussi Kivilinna | 175f9c1 | 2008-07-20 00:08:47 -0700 | [diff] [blame] | 809 | if (tca[TCA_STAB]) { |
| 810 | stab = qdisc_get_stab(tca[TCA_STAB]); |
| 811 | if (IS_ERR(stab)) { |
| 812 | err = PTR_ERR(stab); |
Jarek Poplawski | 7c64b9f | 2009-09-15 23:42:05 -0700 | [diff] [blame] | 813 | goto err_out4; |
Jussi Kivilinna | 175f9c1 | 2008-07-20 00:08:47 -0700 | [diff] [blame] | 814 | } |
| 815 | sch->stab = stab; |
| 816 | } |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 817 | if (tca[TCA_RATE]) { |
Jarek Poplawski | f6f9b93 | 2008-08-27 02:25:17 -0700 | [diff] [blame] | 818 | spinlock_t *root_lock; |
| 819 | |
Patrick McHardy | 23bcf63 | 2009-09-09 18:11:23 -0700 | [diff] [blame] | 820 | err = -EOPNOTSUPP; |
| 821 | if (sch->flags & TCQ_F_MQROOT) |
| 822 | goto err_out4; |
| 823 | |
Jarek Poplawski | f6f9b93 | 2008-08-27 02:25:17 -0700 | [diff] [blame] | 824 | if ((sch->parent != TC_H_ROOT) && |
Patrick McHardy | 23bcf63 | 2009-09-09 18:11:23 -0700 | [diff] [blame] | 825 | !(sch->flags & TCQ_F_INGRESS) && |
| 826 | (!p || !(p->flags & TCQ_F_MQROOT))) |
Jarek Poplawski | f6f9b93 | 2008-08-27 02:25:17 -0700 | [diff] [blame] | 827 | root_lock = qdisc_root_sleeping_lock(sch); |
| 828 | else |
| 829 | root_lock = qdisc_lock(sch); |
| 830 | |
Thomas Graf | 023e09a | 2005-07-05 14:15:53 -0700 | [diff] [blame] | 831 | err = gen_new_estimator(&sch->bstats, &sch->rate_est, |
Jarek Poplawski | f6f9b93 | 2008-08-27 02:25:17 -0700 | [diff] [blame] | 832 | root_lock, tca[TCA_RATE]); |
Patrick McHardy | 23bcf63 | 2009-09-09 18:11:23 -0700 | [diff] [blame] | 833 | if (err) |
| 834 | goto err_out4; |
Thomas Graf | 023e09a | 2005-07-05 14:15:53 -0700 | [diff] [blame] | 835 | } |
Jarek Poplawski | f6e0b23 | 2008-08-22 03:24:05 -0700 | [diff] [blame] | 836 | |
| 837 | qdisc_list_add(sch); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 838 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 839 | return sch; |
| 840 | } |
| 841 | err_out3: |
| 842 | dev_put(dev); |
Thomas Graf | 3d54b82 | 2005-07-05 14:15:09 -0700 | [diff] [blame] | 843 | kfree((char *) sch - sch->padded); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 844 | err_out2: |
| 845 | module_put(ops->owner); |
| 846 | err_out: |
| 847 | *errp = err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 848 | return NULL; |
Patrick McHardy | 23bcf63 | 2009-09-09 18:11:23 -0700 | [diff] [blame] | 849 | |
| 850 | err_out4: |
| 851 | /* |
| 852 | * Any broken qdiscs that would require a ops->reset() here? |
| 853 | * The qdisc was never in action so it shouldn't be necessary. |
| 854 | */ |
Jarek Poplawski | 7c64b9f | 2009-09-15 23:42:05 -0700 | [diff] [blame] | 855 | qdisc_put_stab(sch->stab); |
Patrick McHardy | 23bcf63 | 2009-09-09 18:11:23 -0700 | [diff] [blame] | 856 | if (ops->destroy) |
| 857 | ops->destroy(sch); |
| 858 | goto err_out3; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 859 | } |
| 860 | |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 861 | static int qdisc_change(struct Qdisc *sch, struct nlattr **tca) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 862 | { |
Jussi Kivilinna | 175f9c1 | 2008-07-20 00:08:47 -0700 | [diff] [blame] | 863 | struct qdisc_size_table *stab = NULL; |
| 864 | int err = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 865 | |
Jussi Kivilinna | 175f9c1 | 2008-07-20 00:08:47 -0700 | [diff] [blame] | 866 | if (tca[TCA_OPTIONS]) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 867 | if (sch->ops->change == NULL) |
| 868 | return -EINVAL; |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 869 | err = sch->ops->change(sch, tca[TCA_OPTIONS]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 870 | if (err) |
| 871 | return err; |
| 872 | } |
Jussi Kivilinna | 175f9c1 | 2008-07-20 00:08:47 -0700 | [diff] [blame] | 873 | |
| 874 | if (tca[TCA_STAB]) { |
| 875 | stab = qdisc_get_stab(tca[TCA_STAB]); |
| 876 | if (IS_ERR(stab)) |
| 877 | return PTR_ERR(stab); |
| 878 | } |
| 879 | |
| 880 | qdisc_put_stab(sch->stab); |
| 881 | sch->stab = stab; |
| 882 | |
Patrick McHardy | 23bcf63 | 2009-09-09 18:11:23 -0700 | [diff] [blame] | 883 | if (tca[TCA_RATE]) { |
Stephen Hemminger | 71bcb09 | 2008-11-25 21:13:31 -0800 | [diff] [blame] | 884 | /* NB: ignores errors from replace_estimator |
| 885 | because change can't be undone. */ |
Patrick McHardy | 23bcf63 | 2009-09-09 18:11:23 -0700 | [diff] [blame] | 886 | if (sch->flags & TCQ_F_MQROOT) |
| 887 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 888 | gen_replace_estimator(&sch->bstats, &sch->rate_est, |
Stephen Hemminger | 71bcb09 | 2008-11-25 21:13:31 -0800 | [diff] [blame] | 889 | qdisc_root_sleeping_lock(sch), |
| 890 | tca[TCA_RATE]); |
Patrick McHardy | 23bcf63 | 2009-09-09 18:11:23 -0700 | [diff] [blame] | 891 | } |
| 892 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 893 | return 0; |
| 894 | } |
| 895 | |
| 896 | struct check_loop_arg |
| 897 | { |
| 898 | struct qdisc_walker w; |
| 899 | struct Qdisc *p; |
| 900 | int depth; |
| 901 | }; |
| 902 | |
| 903 | static int check_loop_fn(struct Qdisc *q, unsigned long cl, struct qdisc_walker *w); |
| 904 | |
| 905 | static int check_loop(struct Qdisc *q, struct Qdisc *p, int depth) |
| 906 | { |
| 907 | struct check_loop_arg arg; |
| 908 | |
| 909 | if (q->ops->cl_ops == NULL) |
| 910 | return 0; |
| 911 | |
| 912 | arg.w.stop = arg.w.skip = arg.w.count = 0; |
| 913 | arg.w.fn = check_loop_fn; |
| 914 | arg.depth = depth; |
| 915 | arg.p = p; |
| 916 | q->ops->cl_ops->walk(q, &arg.w); |
| 917 | return arg.w.stop ? -ELOOP : 0; |
| 918 | } |
| 919 | |
| 920 | static int |
| 921 | check_loop_fn(struct Qdisc *q, unsigned long cl, struct qdisc_walker *w) |
| 922 | { |
| 923 | struct Qdisc *leaf; |
Eric Dumazet | 20fea08 | 2007-11-14 01:44:41 -0800 | [diff] [blame] | 924 | const struct Qdisc_class_ops *cops = q->ops->cl_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 925 | struct check_loop_arg *arg = (struct check_loop_arg *)w; |
| 926 | |
| 927 | leaf = cops->leaf(q, cl); |
| 928 | if (leaf) { |
| 929 | if (leaf == arg->p || arg->depth > 7) |
| 930 | return -ELOOP; |
| 931 | return check_loop(leaf, arg->p, arg->depth + 1); |
| 932 | } |
| 933 | return 0; |
| 934 | } |
| 935 | |
| 936 | /* |
| 937 | * Delete/get qdisc. |
| 938 | */ |
| 939 | |
| 940 | static int tc_get_qdisc(struct sk_buff *skb, struct nlmsghdr *n, void *arg) |
| 941 | { |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 942 | struct net *net = sock_net(skb->sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 943 | struct tcmsg *tcm = NLMSG_DATA(n); |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 944 | struct nlattr *tca[TCA_MAX + 1]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 945 | struct net_device *dev; |
| 946 | u32 clid = tcm->tcm_parent; |
| 947 | struct Qdisc *q = NULL; |
| 948 | struct Qdisc *p = NULL; |
| 949 | int err; |
| 950 | |
Octavian Purdila | 09ad9bc | 2009-11-25 15:14:13 -0800 | [diff] [blame] | 951 | if (!net_eq(net, &init_net)) |
Denis V. Lunev | b854272 | 2007-12-01 00:21:31 +1100 | [diff] [blame] | 952 | return -EINVAL; |
| 953 | |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 954 | if ((dev = __dev_get_by_index(&init_net, tcm->tcm_ifindex)) == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 955 | return -ENODEV; |
| 956 | |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 957 | err = nlmsg_parse(n, sizeof(*tcm), tca, TCA_MAX, NULL); |
| 958 | if (err < 0) |
| 959 | return err; |
| 960 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 961 | if (clid) { |
| 962 | if (clid != TC_H_ROOT) { |
| 963 | if (TC_H_MAJ(clid) != TC_H_MAJ(TC_H_INGRESS)) { |
| 964 | if ((p = qdisc_lookup(dev, TC_H_MAJ(clid))) == NULL) |
| 965 | return -ENOENT; |
| 966 | q = qdisc_leaf(p, clid); |
| 967 | } else { /* ingress */ |
David S. Miller | 8123b42 | 2008-08-08 23:23:39 -0700 | [diff] [blame] | 968 | q = dev->rx_queue.qdisc_sleeping; |
YOSHIFUJI Hideaki | 10297b9 | 2007-02-09 23:25:16 +0900 | [diff] [blame] | 969 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 970 | } else { |
Patrick McHardy | af356af | 2009-09-04 06:41:18 +0000 | [diff] [blame] | 971 | q = dev->qdisc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 972 | } |
| 973 | if (!q) |
| 974 | return -ENOENT; |
| 975 | |
| 976 | if (tcm->tcm_handle && q->handle != tcm->tcm_handle) |
| 977 | return -EINVAL; |
| 978 | } else { |
| 979 | if ((q = qdisc_lookup(dev, tcm->tcm_handle)) == NULL) |
| 980 | return -ENOENT; |
| 981 | } |
| 982 | |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 983 | if (tca[TCA_KIND] && nla_strcmp(tca[TCA_KIND], q->ops->id)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 984 | return -EINVAL; |
| 985 | |
| 986 | if (n->nlmsg_type == RTM_DELQDISC) { |
| 987 | if (!clid) |
| 988 | return -EINVAL; |
| 989 | if (q->handle == 0) |
| 990 | return -ENOENT; |
David S. Miller | 99194cf | 2008-07-17 04:54:10 -0700 | [diff] [blame] | 991 | if ((err = qdisc_graft(dev, p, skb, n, clid, NULL, q)) != 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 992 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 993 | } else { |
| 994 | qdisc_notify(skb, n, clid, NULL, q); |
| 995 | } |
| 996 | return 0; |
| 997 | } |
| 998 | |
| 999 | /* |
| 1000 | Create/change qdisc. |
| 1001 | */ |
| 1002 | |
| 1003 | static int tc_modify_qdisc(struct sk_buff *skb, struct nlmsghdr *n, void *arg) |
| 1004 | { |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 1005 | struct net *net = sock_net(skb->sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1006 | struct tcmsg *tcm; |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 1007 | struct nlattr *tca[TCA_MAX + 1]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1008 | struct net_device *dev; |
| 1009 | u32 clid; |
| 1010 | struct Qdisc *q, *p; |
| 1011 | int err; |
| 1012 | |
Octavian Purdila | 09ad9bc | 2009-11-25 15:14:13 -0800 | [diff] [blame] | 1013 | if (!net_eq(net, &init_net)) |
Denis V. Lunev | b854272 | 2007-12-01 00:21:31 +1100 | [diff] [blame] | 1014 | return -EINVAL; |
| 1015 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1016 | replay: |
| 1017 | /* Reinit, just in case something touches this. */ |
| 1018 | tcm = NLMSG_DATA(n); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1019 | clid = tcm->tcm_parent; |
| 1020 | q = p = NULL; |
| 1021 | |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 1022 | if ((dev = __dev_get_by_index(&init_net, tcm->tcm_ifindex)) == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1023 | return -ENODEV; |
| 1024 | |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 1025 | err = nlmsg_parse(n, sizeof(*tcm), tca, TCA_MAX, NULL); |
| 1026 | if (err < 0) |
| 1027 | return err; |
| 1028 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1029 | if (clid) { |
| 1030 | if (clid != TC_H_ROOT) { |
| 1031 | if (clid != TC_H_INGRESS) { |
| 1032 | if ((p = qdisc_lookup(dev, TC_H_MAJ(clid))) == NULL) |
| 1033 | return -ENOENT; |
| 1034 | q = qdisc_leaf(p, clid); |
| 1035 | } else { /*ingress */ |
David S. Miller | 8123b42 | 2008-08-08 23:23:39 -0700 | [diff] [blame] | 1036 | q = dev->rx_queue.qdisc_sleeping; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1037 | } |
| 1038 | } else { |
Patrick McHardy | af356af | 2009-09-04 06:41:18 +0000 | [diff] [blame] | 1039 | q = dev->qdisc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1040 | } |
| 1041 | |
| 1042 | /* It may be default qdisc, ignore it */ |
| 1043 | if (q && q->handle == 0) |
| 1044 | q = NULL; |
| 1045 | |
| 1046 | if (!q || !tcm->tcm_handle || q->handle != tcm->tcm_handle) { |
| 1047 | if (tcm->tcm_handle) { |
| 1048 | if (q && !(n->nlmsg_flags&NLM_F_REPLACE)) |
| 1049 | return -EEXIST; |
| 1050 | if (TC_H_MIN(tcm->tcm_handle)) |
| 1051 | return -EINVAL; |
| 1052 | if ((q = qdisc_lookup(dev, tcm->tcm_handle)) == NULL) |
| 1053 | goto create_n_graft; |
| 1054 | if (n->nlmsg_flags&NLM_F_EXCL) |
| 1055 | return -EEXIST; |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 1056 | if (tca[TCA_KIND] && nla_strcmp(tca[TCA_KIND], q->ops->id)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1057 | return -EINVAL; |
| 1058 | if (q == p || |
| 1059 | (p && check_loop(q, p, 0))) |
| 1060 | return -ELOOP; |
| 1061 | atomic_inc(&q->refcnt); |
| 1062 | goto graft; |
| 1063 | } else { |
| 1064 | if (q == NULL) |
| 1065 | goto create_n_graft; |
| 1066 | |
| 1067 | /* This magic test requires explanation. |
| 1068 | * |
| 1069 | * We know, that some child q is already |
| 1070 | * attached to this parent and have choice: |
| 1071 | * either to change it or to create/graft new one. |
| 1072 | * |
| 1073 | * 1. We are allowed to create/graft only |
| 1074 | * if CREATE and REPLACE flags are set. |
| 1075 | * |
| 1076 | * 2. If EXCL is set, requestor wanted to say, |
| 1077 | * that qdisc tcm_handle is not expected |
| 1078 | * to exist, so that we choose create/graft too. |
| 1079 | * |
| 1080 | * 3. The last case is when no flags are set. |
| 1081 | * Alas, it is sort of hole in API, we |
| 1082 | * cannot decide what to do unambiguously. |
| 1083 | * For now we select create/graft, if |
| 1084 | * user gave KIND, which does not match existing. |
| 1085 | */ |
| 1086 | if ((n->nlmsg_flags&NLM_F_CREATE) && |
| 1087 | (n->nlmsg_flags&NLM_F_REPLACE) && |
| 1088 | ((n->nlmsg_flags&NLM_F_EXCL) || |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 1089 | (tca[TCA_KIND] && |
| 1090 | nla_strcmp(tca[TCA_KIND], q->ops->id)))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1091 | goto create_n_graft; |
| 1092 | } |
| 1093 | } |
| 1094 | } else { |
| 1095 | if (!tcm->tcm_handle) |
| 1096 | return -EINVAL; |
| 1097 | q = qdisc_lookup(dev, tcm->tcm_handle); |
| 1098 | } |
| 1099 | |
| 1100 | /* Change qdisc parameters */ |
| 1101 | if (q == NULL) |
| 1102 | return -ENOENT; |
| 1103 | if (n->nlmsg_flags&NLM_F_EXCL) |
| 1104 | return -EEXIST; |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 1105 | if (tca[TCA_KIND] && nla_strcmp(tca[TCA_KIND], q->ops->id)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1106 | return -EINVAL; |
| 1107 | err = qdisc_change(q, tca); |
| 1108 | if (err == 0) |
| 1109 | qdisc_notify(skb, n, clid, NULL, q); |
| 1110 | return err; |
| 1111 | |
| 1112 | create_n_graft: |
| 1113 | if (!(n->nlmsg_flags&NLM_F_CREATE)) |
| 1114 | return -ENOENT; |
| 1115 | if (clid == TC_H_INGRESS) |
Patrick McHardy | 23bcf63 | 2009-09-09 18:11:23 -0700 | [diff] [blame] | 1116 | q = qdisc_create(dev, &dev->rx_queue, p, |
David S. Miller | bb949fb | 2008-07-08 16:55:56 -0700 | [diff] [blame] | 1117 | tcm->tcm_parent, tcm->tcm_parent, |
Patrick McHardy | ffc8fef | 2007-07-30 17:11:50 -0700 | [diff] [blame] | 1118 | tca, &err); |
David S. Miller | 6ec1c69 | 2009-09-06 01:58:51 -0700 | [diff] [blame] | 1119 | else { |
Jarek Poplawski | 926e61b | 2009-09-15 02:53:07 -0700 | [diff] [blame] | 1120 | struct netdev_queue *dev_queue; |
David S. Miller | 6ec1c69 | 2009-09-06 01:58:51 -0700 | [diff] [blame] | 1121 | |
| 1122 | if (p && p->ops->cl_ops && p->ops->cl_ops->select_queue) |
Jarek Poplawski | 926e61b | 2009-09-15 02:53:07 -0700 | [diff] [blame] | 1123 | dev_queue = p->ops->cl_ops->select_queue(p, tcm); |
| 1124 | else if (p) |
| 1125 | dev_queue = p->dev_queue; |
| 1126 | else |
| 1127 | dev_queue = netdev_get_tx_queue(dev, 0); |
David S. Miller | 6ec1c69 | 2009-09-06 01:58:51 -0700 | [diff] [blame] | 1128 | |
Jarek Poplawski | 926e61b | 2009-09-15 02:53:07 -0700 | [diff] [blame] | 1129 | q = qdisc_create(dev, dev_queue, p, |
David S. Miller | bb949fb | 2008-07-08 16:55:56 -0700 | [diff] [blame] | 1130 | tcm->tcm_parent, tcm->tcm_handle, |
Patrick McHardy | ffc8fef | 2007-07-30 17:11:50 -0700 | [diff] [blame] | 1131 | tca, &err); |
David S. Miller | 6ec1c69 | 2009-09-06 01:58:51 -0700 | [diff] [blame] | 1132 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1133 | if (q == NULL) { |
| 1134 | if (err == -EAGAIN) |
| 1135 | goto replay; |
| 1136 | return err; |
| 1137 | } |
| 1138 | |
| 1139 | graft: |
Ilpo Järvinen | e5befbd | 2008-08-18 22:30:01 -0700 | [diff] [blame] | 1140 | err = qdisc_graft(dev, p, skb, n, clid, q, NULL); |
| 1141 | if (err) { |
| 1142 | if (q) |
| 1143 | qdisc_destroy(q); |
| 1144 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1145 | } |
Ilpo Järvinen | e5befbd | 2008-08-18 22:30:01 -0700 | [diff] [blame] | 1146 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1147 | return 0; |
| 1148 | } |
| 1149 | |
| 1150 | static int tc_fill_qdisc(struct sk_buff *skb, struct Qdisc *q, u32 clid, |
Jamal Hadi Salim | e431b8c | 2005-06-18 22:55:31 -0700 | [diff] [blame] | 1151 | u32 pid, u32 seq, u16 flags, int event) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1152 | { |
| 1153 | struct tcmsg *tcm; |
| 1154 | struct nlmsghdr *nlh; |
Arnaldo Carvalho de Melo | 27a884d | 2007-04-19 20:29:13 -0700 | [diff] [blame] | 1155 | unsigned char *b = skb_tail_pointer(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1156 | struct gnet_dump d; |
| 1157 | |
Jamal Hadi Salim | e431b8c | 2005-06-18 22:55:31 -0700 | [diff] [blame] | 1158 | nlh = NLMSG_NEW(skb, pid, seq, event, sizeof(*tcm), flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1159 | tcm = NLMSG_DATA(nlh); |
| 1160 | tcm->tcm_family = AF_UNSPEC; |
Patrick McHardy | 9ef1d4c | 2005-06-28 12:55:30 -0700 | [diff] [blame] | 1161 | tcm->tcm__pad1 = 0; |
| 1162 | tcm->tcm__pad2 = 0; |
David S. Miller | 5ce2d48 | 2008-07-08 17:06:30 -0700 | [diff] [blame] | 1163 | tcm->tcm_ifindex = qdisc_dev(q)->ifindex; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1164 | tcm->tcm_parent = clid; |
| 1165 | tcm->tcm_handle = q->handle; |
| 1166 | tcm->tcm_info = atomic_read(&q->refcnt); |
Patrick McHardy | 57e1c48 | 2008-01-23 20:34:28 -0800 | [diff] [blame] | 1167 | NLA_PUT_STRING(skb, TCA_KIND, q->ops->id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1168 | if (q->ops->dump && q->ops->dump(q, skb) < 0) |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 1169 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1170 | q->qstats.qlen = q->q.qlen; |
| 1171 | |
Jussi Kivilinna | 175f9c1 | 2008-07-20 00:08:47 -0700 | [diff] [blame] | 1172 | if (q->stab && qdisc_dump_stab(skb, q->stab) < 0) |
| 1173 | goto nla_put_failure; |
| 1174 | |
Jarek Poplawski | 102396a | 2008-08-29 14:21:52 -0700 | [diff] [blame] | 1175 | if (gnet_stats_start_copy_compat(skb, TCA_STATS2, TCA_STATS, TCA_XSTATS, |
| 1176 | qdisc_root_sleeping_lock(q), &d) < 0) |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 1177 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1178 | |
| 1179 | if (q->ops->dump_stats && q->ops->dump_stats(q, &d) < 0) |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 1180 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1181 | |
| 1182 | if (gnet_stats_copy_basic(&d, &q->bstats) < 0 || |
Eric Dumazet | d250a5f | 2009-10-02 10:32:18 +0000 | [diff] [blame] | 1183 | gnet_stats_copy_rate_est(&d, &q->bstats, &q->rate_est) < 0 || |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1184 | gnet_stats_copy_queue(&d, &q->qstats) < 0) |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 1185 | goto nla_put_failure; |
YOSHIFUJI Hideaki | 10297b9 | 2007-02-09 23:25:16 +0900 | [diff] [blame] | 1186 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1187 | if (gnet_stats_finish_copy(&d) < 0) |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 1188 | goto nla_put_failure; |
YOSHIFUJI Hideaki | 10297b9 | 2007-02-09 23:25:16 +0900 | [diff] [blame] | 1189 | |
Arnaldo Carvalho de Melo | 27a884d | 2007-04-19 20:29:13 -0700 | [diff] [blame] | 1190 | nlh->nlmsg_len = skb_tail_pointer(skb) - b; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1191 | return skb->len; |
| 1192 | |
| 1193 | nlmsg_failure: |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 1194 | nla_put_failure: |
Arnaldo Carvalho de Melo | dc5fc57 | 2007-03-25 23:06:12 -0700 | [diff] [blame] | 1195 | nlmsg_trim(skb, b); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1196 | return -1; |
| 1197 | } |
| 1198 | |
| 1199 | static int qdisc_notify(struct sk_buff *oskb, struct nlmsghdr *n, |
| 1200 | u32 clid, struct Qdisc *old, struct Qdisc *new) |
| 1201 | { |
| 1202 | struct sk_buff *skb; |
| 1203 | u32 pid = oskb ? NETLINK_CB(oskb).pid : 0; |
| 1204 | |
| 1205 | skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); |
| 1206 | if (!skb) |
| 1207 | return -ENOBUFS; |
| 1208 | |
| 1209 | if (old && old->handle) { |
| 1210 | if (tc_fill_qdisc(skb, old, clid, pid, n->nlmsg_seq, 0, RTM_DELQDISC) < 0) |
| 1211 | goto err_out; |
| 1212 | } |
| 1213 | if (new) { |
| 1214 | if (tc_fill_qdisc(skb, new, clid, pid, n->nlmsg_seq, old ? NLM_F_REPLACE : 0, RTM_NEWQDISC) < 0) |
| 1215 | goto err_out; |
| 1216 | } |
| 1217 | |
| 1218 | if (skb->len) |
Denis V. Lunev | 97c53ca | 2007-11-19 22:26:51 -0800 | [diff] [blame] | 1219 | return 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] | 1220 | |
| 1221 | err_out: |
| 1222 | kfree_skb(skb); |
| 1223 | return -EINVAL; |
| 1224 | } |
| 1225 | |
David S. Miller | 3072367 | 2008-07-18 22:50:15 -0700 | [diff] [blame] | 1226 | static bool tc_qdisc_dump_ignore(struct Qdisc *q) |
| 1227 | { |
| 1228 | return (q->flags & TCQ_F_BUILTIN) ? true : false; |
| 1229 | } |
| 1230 | |
| 1231 | static int tc_dump_qdisc_root(struct Qdisc *root, struct sk_buff *skb, |
| 1232 | struct netlink_callback *cb, |
| 1233 | int *q_idx_p, int s_q_idx) |
| 1234 | { |
| 1235 | int ret = 0, q_idx = *q_idx_p; |
| 1236 | struct Qdisc *q; |
| 1237 | |
| 1238 | if (!root) |
| 1239 | return 0; |
| 1240 | |
| 1241 | q = root; |
| 1242 | if (q_idx < s_q_idx) { |
| 1243 | q_idx++; |
| 1244 | } else { |
| 1245 | if (!tc_qdisc_dump_ignore(q) && |
| 1246 | tc_fill_qdisc(skb, q, q->parent, NETLINK_CB(cb->skb).pid, |
| 1247 | cb->nlh->nlmsg_seq, NLM_F_MULTI, RTM_NEWQDISC) <= 0) |
| 1248 | goto done; |
| 1249 | q_idx++; |
| 1250 | } |
| 1251 | list_for_each_entry(q, &root->list, list) { |
| 1252 | if (q_idx < s_q_idx) { |
| 1253 | q_idx++; |
| 1254 | continue; |
| 1255 | } |
| 1256 | if (!tc_qdisc_dump_ignore(q) && |
| 1257 | tc_fill_qdisc(skb, q, q->parent, NETLINK_CB(cb->skb).pid, |
| 1258 | cb->nlh->nlmsg_seq, NLM_F_MULTI, RTM_NEWQDISC) <= 0) |
| 1259 | goto done; |
| 1260 | q_idx++; |
| 1261 | } |
| 1262 | |
| 1263 | out: |
| 1264 | *q_idx_p = q_idx; |
| 1265 | return ret; |
| 1266 | done: |
| 1267 | ret = -1; |
| 1268 | goto out; |
| 1269 | } |
| 1270 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1271 | static int tc_dump_qdisc(struct sk_buff *skb, struct netlink_callback *cb) |
| 1272 | { |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 1273 | struct net *net = sock_net(skb->sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1274 | int idx, q_idx; |
| 1275 | int s_idx, s_q_idx; |
| 1276 | struct net_device *dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1277 | |
Octavian Purdila | 09ad9bc | 2009-11-25 15:14:13 -0800 | [diff] [blame] | 1278 | if (!net_eq(net, &init_net)) |
Denis V. Lunev | b854272 | 2007-12-01 00:21:31 +1100 | [diff] [blame] | 1279 | return 0; |
| 1280 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1281 | s_idx = cb->args[0]; |
| 1282 | s_q_idx = q_idx = cb->args[1]; |
stephen hemminger | f1e9016 | 2009-11-10 07:54:49 +0000 | [diff] [blame] | 1283 | |
| 1284 | rcu_read_lock(); |
Pavel Emelianov | 7562f87 | 2007-05-03 15:13:45 -0700 | [diff] [blame] | 1285 | idx = 0; |
stephen hemminger | f1e9016 | 2009-11-10 07:54:49 +0000 | [diff] [blame] | 1286 | for_each_netdev_rcu(&init_net, dev) { |
David S. Miller | 3072367 | 2008-07-18 22:50:15 -0700 | [diff] [blame] | 1287 | struct netdev_queue *dev_queue; |
| 1288 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1289 | if (idx < s_idx) |
Pavel Emelianov | 7562f87 | 2007-05-03 15:13:45 -0700 | [diff] [blame] | 1290 | goto cont; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1291 | if (idx > s_idx) |
| 1292 | s_q_idx = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1293 | q_idx = 0; |
David S. Miller | 3072367 | 2008-07-18 22:50:15 -0700 | [diff] [blame] | 1294 | |
Patrick McHardy | af356af | 2009-09-04 06:41:18 +0000 | [diff] [blame] | 1295 | if (tc_dump_qdisc_root(dev->qdisc, skb, cb, &q_idx, s_q_idx) < 0) |
David S. Miller | 3072367 | 2008-07-18 22:50:15 -0700 | [diff] [blame] | 1296 | goto done; |
| 1297 | |
| 1298 | dev_queue = &dev->rx_queue; |
David S. Miller | 827ebd6 | 2008-08-07 20:26:40 -0700 | [diff] [blame] | 1299 | if (tc_dump_qdisc_root(dev_queue->qdisc_sleeping, skb, cb, &q_idx, s_q_idx) < 0) |
David S. Miller | 3072367 | 2008-07-18 22:50:15 -0700 | [diff] [blame] | 1300 | goto done; |
| 1301 | |
Pavel Emelianov | 7562f87 | 2007-05-03 15:13:45 -0700 | [diff] [blame] | 1302 | cont: |
| 1303 | idx++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1304 | } |
| 1305 | |
| 1306 | done: |
stephen hemminger | f1e9016 | 2009-11-10 07:54:49 +0000 | [diff] [blame] | 1307 | rcu_read_unlock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1308 | |
| 1309 | cb->args[0] = idx; |
| 1310 | cb->args[1] = q_idx; |
| 1311 | |
| 1312 | return skb->len; |
| 1313 | } |
| 1314 | |
| 1315 | |
| 1316 | |
| 1317 | /************************************************ |
| 1318 | * Traffic classes manipulation. * |
| 1319 | ************************************************/ |
| 1320 | |
| 1321 | |
| 1322 | |
| 1323 | static int tc_ctl_tclass(struct sk_buff *skb, struct nlmsghdr *n, void *arg) |
| 1324 | { |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 1325 | struct net *net = sock_net(skb->sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1326 | struct tcmsg *tcm = NLMSG_DATA(n); |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 1327 | struct nlattr *tca[TCA_MAX + 1]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1328 | struct net_device *dev; |
| 1329 | struct Qdisc *q = NULL; |
Eric Dumazet | 20fea08 | 2007-11-14 01:44:41 -0800 | [diff] [blame] | 1330 | const struct Qdisc_class_ops *cops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1331 | unsigned long cl = 0; |
| 1332 | unsigned long new_cl; |
| 1333 | u32 pid = tcm->tcm_parent; |
| 1334 | u32 clid = tcm->tcm_handle; |
| 1335 | u32 qid = TC_H_MAJ(clid); |
| 1336 | int err; |
| 1337 | |
Octavian Purdila | 09ad9bc | 2009-11-25 15:14:13 -0800 | [diff] [blame] | 1338 | if (!net_eq(net, &init_net)) |
Denis V. Lunev | b854272 | 2007-12-01 00:21:31 +1100 | [diff] [blame] | 1339 | return -EINVAL; |
| 1340 | |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 1341 | if ((dev = __dev_get_by_index(&init_net, tcm->tcm_ifindex)) == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1342 | return -ENODEV; |
| 1343 | |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 1344 | err = nlmsg_parse(n, sizeof(*tcm), tca, TCA_MAX, NULL); |
| 1345 | if (err < 0) |
| 1346 | return err; |
| 1347 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1348 | /* |
| 1349 | parent == TC_H_UNSPEC - unspecified parent. |
| 1350 | parent == TC_H_ROOT - class is root, which has no parent. |
| 1351 | parent == X:0 - parent is root class. |
| 1352 | parent == X:Y - parent is a node in hierarchy. |
| 1353 | parent == 0:Y - parent is X:Y, where X:0 is qdisc. |
| 1354 | |
| 1355 | handle == 0:0 - generate handle from kernel pool. |
| 1356 | handle == 0:Y - class is X:Y, where X:0 is qdisc. |
| 1357 | handle == X:Y - clear. |
| 1358 | handle == X:0 - root class. |
| 1359 | */ |
| 1360 | |
| 1361 | /* Step 1. Determine qdisc handle X:0 */ |
| 1362 | |
| 1363 | if (pid != TC_H_ROOT) { |
| 1364 | u32 qid1 = TC_H_MAJ(pid); |
| 1365 | |
| 1366 | if (qid && qid1) { |
| 1367 | /* If both majors are known, they must be identical. */ |
| 1368 | if (qid != qid1) |
| 1369 | return -EINVAL; |
| 1370 | } else if (qid1) { |
| 1371 | qid = qid1; |
| 1372 | } else if (qid == 0) |
Patrick McHardy | af356af | 2009-09-04 06:41:18 +0000 | [diff] [blame] | 1373 | qid = dev->qdisc->handle; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1374 | |
| 1375 | /* Now qid is genuine qdisc handle consistent |
| 1376 | both with parent and child. |
| 1377 | |
| 1378 | TC_H_MAJ(pid) still may be unspecified, complete it now. |
| 1379 | */ |
| 1380 | if (pid) |
| 1381 | pid = TC_H_MAKE(qid, pid); |
| 1382 | } else { |
| 1383 | if (qid == 0) |
Patrick McHardy | af356af | 2009-09-04 06:41:18 +0000 | [diff] [blame] | 1384 | qid = dev->qdisc->handle; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1385 | } |
| 1386 | |
| 1387 | /* OK. Locate qdisc */ |
YOSHIFUJI Hideaki | 10297b9 | 2007-02-09 23:25:16 +0900 | [diff] [blame] | 1388 | if ((q = qdisc_lookup(dev, qid)) == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1389 | return -ENOENT; |
| 1390 | |
| 1391 | /* An check that it supports classes */ |
| 1392 | cops = q->ops->cl_ops; |
| 1393 | if (cops == NULL) |
| 1394 | return -EINVAL; |
| 1395 | |
| 1396 | /* Now try to get class */ |
| 1397 | if (clid == 0) { |
| 1398 | if (pid == TC_H_ROOT) |
| 1399 | clid = qid; |
| 1400 | } else |
| 1401 | clid = TC_H_MAKE(qid, clid); |
| 1402 | |
| 1403 | if (clid) |
| 1404 | cl = cops->get(q, clid); |
| 1405 | |
| 1406 | if (cl == 0) { |
| 1407 | err = -ENOENT; |
| 1408 | if (n->nlmsg_type != RTM_NEWTCLASS || !(n->nlmsg_flags&NLM_F_CREATE)) |
| 1409 | goto out; |
| 1410 | } else { |
| 1411 | switch (n->nlmsg_type) { |
YOSHIFUJI Hideaki | 10297b9 | 2007-02-09 23:25:16 +0900 | [diff] [blame] | 1412 | case RTM_NEWTCLASS: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1413 | err = -EEXIST; |
| 1414 | if (n->nlmsg_flags&NLM_F_EXCL) |
| 1415 | goto out; |
| 1416 | break; |
| 1417 | case RTM_DELTCLASS: |
Patrick McHardy | de6d5cd | 2009-09-04 06:41:16 +0000 | [diff] [blame] | 1418 | err = -EOPNOTSUPP; |
| 1419 | if (cops->delete) |
| 1420 | err = cops->delete(q, cl); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1421 | if (err == 0) |
| 1422 | tclass_notify(skb, n, q, cl, RTM_DELTCLASS); |
| 1423 | goto out; |
| 1424 | case RTM_GETTCLASS: |
| 1425 | err = tclass_notify(skb, n, q, cl, RTM_NEWTCLASS); |
| 1426 | goto out; |
| 1427 | default: |
| 1428 | err = -EINVAL; |
| 1429 | goto out; |
| 1430 | } |
| 1431 | } |
| 1432 | |
| 1433 | new_cl = cl; |
Patrick McHardy | de6d5cd | 2009-09-04 06:41:16 +0000 | [diff] [blame] | 1434 | err = -EOPNOTSUPP; |
| 1435 | if (cops->change) |
| 1436 | err = cops->change(q, clid, pid, tca, &new_cl); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1437 | if (err == 0) |
| 1438 | tclass_notify(skb, n, q, new_cl, RTM_NEWTCLASS); |
| 1439 | |
| 1440 | out: |
| 1441 | if (cl) |
| 1442 | cops->put(q, cl); |
| 1443 | |
| 1444 | return err; |
| 1445 | } |
| 1446 | |
| 1447 | |
| 1448 | static int tc_fill_tclass(struct sk_buff *skb, struct Qdisc *q, |
| 1449 | unsigned long cl, |
Jamal Hadi Salim | e431b8c | 2005-06-18 22:55:31 -0700 | [diff] [blame] | 1450 | u32 pid, u32 seq, u16 flags, int event) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1451 | { |
| 1452 | struct tcmsg *tcm; |
| 1453 | struct nlmsghdr *nlh; |
Arnaldo Carvalho de Melo | 27a884d | 2007-04-19 20:29:13 -0700 | [diff] [blame] | 1454 | unsigned char *b = skb_tail_pointer(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1455 | struct gnet_dump d; |
Eric Dumazet | 20fea08 | 2007-11-14 01:44:41 -0800 | [diff] [blame] | 1456 | const struct Qdisc_class_ops *cl_ops = q->ops->cl_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1457 | |
Jamal Hadi Salim | e431b8c | 2005-06-18 22:55:31 -0700 | [diff] [blame] | 1458 | nlh = NLMSG_NEW(skb, pid, seq, event, sizeof(*tcm), flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1459 | tcm = NLMSG_DATA(nlh); |
| 1460 | tcm->tcm_family = AF_UNSPEC; |
Eric Dumazet | 16ebb5e | 2009-09-02 02:40:09 +0000 | [diff] [blame] | 1461 | tcm->tcm__pad1 = 0; |
| 1462 | tcm->tcm__pad2 = 0; |
David S. Miller | 5ce2d48 | 2008-07-08 17:06:30 -0700 | [diff] [blame] | 1463 | tcm->tcm_ifindex = qdisc_dev(q)->ifindex; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1464 | tcm->tcm_parent = q->handle; |
| 1465 | tcm->tcm_handle = q->handle; |
| 1466 | tcm->tcm_info = 0; |
Patrick McHardy | 57e1c48 | 2008-01-23 20:34:28 -0800 | [diff] [blame] | 1467 | NLA_PUT_STRING(skb, TCA_KIND, q->ops->id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1468 | if (cl_ops->dump && cl_ops->dump(q, cl, skb, tcm) < 0) |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 1469 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1470 | |
Jarek Poplawski | 102396a | 2008-08-29 14:21:52 -0700 | [diff] [blame] | 1471 | if (gnet_stats_start_copy_compat(skb, TCA_STATS2, TCA_STATS, TCA_XSTATS, |
| 1472 | qdisc_root_sleeping_lock(q), &d) < 0) |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 1473 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1474 | |
| 1475 | if (cl_ops->dump_stats && cl_ops->dump_stats(q, cl, &d) < 0) |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 1476 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1477 | |
| 1478 | if (gnet_stats_finish_copy(&d) < 0) |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 1479 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1480 | |
Arnaldo Carvalho de Melo | 27a884d | 2007-04-19 20:29:13 -0700 | [diff] [blame] | 1481 | nlh->nlmsg_len = skb_tail_pointer(skb) - b; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1482 | return skb->len; |
| 1483 | |
| 1484 | nlmsg_failure: |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 1485 | nla_put_failure: |
Arnaldo Carvalho de Melo | dc5fc57 | 2007-03-25 23:06:12 -0700 | [diff] [blame] | 1486 | nlmsg_trim(skb, b); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1487 | return -1; |
| 1488 | } |
| 1489 | |
| 1490 | static int tclass_notify(struct sk_buff *oskb, struct nlmsghdr *n, |
| 1491 | struct Qdisc *q, unsigned long cl, int event) |
| 1492 | { |
| 1493 | struct sk_buff *skb; |
| 1494 | u32 pid = oskb ? NETLINK_CB(oskb).pid : 0; |
| 1495 | |
| 1496 | skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); |
| 1497 | if (!skb) |
| 1498 | return -ENOBUFS; |
| 1499 | |
| 1500 | if (tc_fill_tclass(skb, q, cl, pid, n->nlmsg_seq, 0, event) < 0) { |
| 1501 | kfree_skb(skb); |
| 1502 | return -EINVAL; |
| 1503 | } |
| 1504 | |
Denis V. Lunev | 97c53ca | 2007-11-19 22:26:51 -0800 | [diff] [blame] | 1505 | return 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] | 1506 | } |
| 1507 | |
| 1508 | struct qdisc_dump_args |
| 1509 | { |
| 1510 | struct qdisc_walker w; |
| 1511 | struct sk_buff *skb; |
| 1512 | struct netlink_callback *cb; |
| 1513 | }; |
| 1514 | |
| 1515 | static int qdisc_class_dump(struct Qdisc *q, unsigned long cl, struct qdisc_walker *arg) |
| 1516 | { |
| 1517 | struct qdisc_dump_args *a = (struct qdisc_dump_args *)arg; |
| 1518 | |
| 1519 | return tc_fill_tclass(a->skb, q, cl, NETLINK_CB(a->cb->skb).pid, |
| 1520 | a->cb->nlh->nlmsg_seq, NLM_F_MULTI, RTM_NEWTCLASS); |
| 1521 | } |
| 1522 | |
David S. Miller | 3072367 | 2008-07-18 22:50:15 -0700 | [diff] [blame] | 1523 | static int tc_dump_tclass_qdisc(struct Qdisc *q, struct sk_buff *skb, |
| 1524 | struct tcmsg *tcm, struct netlink_callback *cb, |
| 1525 | int *t_p, int s_t) |
| 1526 | { |
| 1527 | struct qdisc_dump_args arg; |
| 1528 | |
| 1529 | if (tc_qdisc_dump_ignore(q) || |
| 1530 | *t_p < s_t || !q->ops->cl_ops || |
| 1531 | (tcm->tcm_parent && |
| 1532 | TC_H_MAJ(tcm->tcm_parent) != q->handle)) { |
| 1533 | (*t_p)++; |
| 1534 | return 0; |
| 1535 | } |
| 1536 | if (*t_p > s_t) |
| 1537 | memset(&cb->args[1], 0, sizeof(cb->args)-sizeof(cb->args[0])); |
| 1538 | arg.w.fn = qdisc_class_dump; |
| 1539 | arg.skb = skb; |
| 1540 | arg.cb = cb; |
| 1541 | arg.w.stop = 0; |
| 1542 | arg.w.skip = cb->args[1]; |
| 1543 | arg.w.count = 0; |
| 1544 | q->ops->cl_ops->walk(q, &arg.w); |
| 1545 | cb->args[1] = arg.w.count; |
| 1546 | if (arg.w.stop) |
| 1547 | return -1; |
| 1548 | (*t_p)++; |
| 1549 | return 0; |
| 1550 | } |
| 1551 | |
| 1552 | static int tc_dump_tclass_root(struct Qdisc *root, struct sk_buff *skb, |
| 1553 | struct tcmsg *tcm, struct netlink_callback *cb, |
| 1554 | int *t_p, int s_t) |
| 1555 | { |
| 1556 | struct Qdisc *q; |
| 1557 | |
| 1558 | if (!root) |
| 1559 | return 0; |
| 1560 | |
| 1561 | if (tc_dump_tclass_qdisc(root, skb, tcm, cb, t_p, s_t) < 0) |
| 1562 | return -1; |
| 1563 | |
| 1564 | list_for_each_entry(q, &root->list, list) { |
| 1565 | if (tc_dump_tclass_qdisc(q, skb, tcm, cb, t_p, s_t) < 0) |
| 1566 | return -1; |
| 1567 | } |
| 1568 | |
| 1569 | return 0; |
| 1570 | } |
| 1571 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1572 | static int tc_dump_tclass(struct sk_buff *skb, struct netlink_callback *cb) |
| 1573 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1574 | struct tcmsg *tcm = (struct tcmsg*)NLMSG_DATA(cb->nlh); |
David S. Miller | 3072367 | 2008-07-18 22:50:15 -0700 | [diff] [blame] | 1575 | struct net *net = sock_net(skb->sk); |
| 1576 | struct netdev_queue *dev_queue; |
| 1577 | struct net_device *dev; |
| 1578 | int t, s_t; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1579 | |
Octavian Purdila | 09ad9bc | 2009-11-25 15:14:13 -0800 | [diff] [blame] | 1580 | if (!net_eq(net, &init_net)) |
Denis V. Lunev | b854272 | 2007-12-01 00:21:31 +1100 | [diff] [blame] | 1581 | return 0; |
| 1582 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1583 | if (cb->nlh->nlmsg_len < NLMSG_LENGTH(sizeof(*tcm))) |
| 1584 | return 0; |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 1585 | if ((dev = dev_get_by_index(&init_net, tcm->tcm_ifindex)) == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1586 | return 0; |
| 1587 | |
| 1588 | s_t = cb->args[0]; |
| 1589 | t = 0; |
| 1590 | |
Patrick McHardy | af356af | 2009-09-04 06:41:18 +0000 | [diff] [blame] | 1591 | if (tc_dump_tclass_root(dev->qdisc, skb, tcm, cb, &t, s_t) < 0) |
David S. Miller | 3072367 | 2008-07-18 22:50:15 -0700 | [diff] [blame] | 1592 | goto done; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1593 | |
David S. Miller | 3072367 | 2008-07-18 22:50:15 -0700 | [diff] [blame] | 1594 | dev_queue = &dev->rx_queue; |
David S. Miller | 8123b42 | 2008-08-08 23:23:39 -0700 | [diff] [blame] | 1595 | if (tc_dump_tclass_root(dev_queue->qdisc_sleeping, skb, tcm, cb, &t, s_t) < 0) |
David S. Miller | 3072367 | 2008-07-18 22:50:15 -0700 | [diff] [blame] | 1596 | goto done; |
| 1597 | |
| 1598 | done: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1599 | cb->args[0] = t; |
| 1600 | |
| 1601 | dev_put(dev); |
| 1602 | return skb->len; |
| 1603 | } |
| 1604 | |
| 1605 | /* Main classifier routine: scans classifier chain attached |
| 1606 | to this qdisc, (optionally) tests for protocol and asks |
| 1607 | specific classifiers. |
| 1608 | */ |
Patrick McHardy | 73ca491 | 2007-07-15 00:02:31 -0700 | [diff] [blame] | 1609 | int tc_classify_compat(struct sk_buff *skb, struct tcf_proto *tp, |
| 1610 | struct tcf_result *res) |
| 1611 | { |
| 1612 | __be16 protocol = skb->protocol; |
| 1613 | int err = 0; |
| 1614 | |
| 1615 | for (; tp; tp = tp->next) { |
| 1616 | if ((tp->protocol == protocol || |
| 1617 | tp->protocol == htons(ETH_P_ALL)) && |
| 1618 | (err = tp->classify(skb, tp, res)) >= 0) { |
| 1619 | #ifdef CONFIG_NET_CLS_ACT |
| 1620 | if (err != TC_ACT_RECLASSIFY && skb->tc_verd) |
| 1621 | skb->tc_verd = SET_TC_VERD(skb->tc_verd, 0); |
| 1622 | #endif |
| 1623 | return err; |
| 1624 | } |
| 1625 | } |
| 1626 | return -1; |
| 1627 | } |
| 1628 | EXPORT_SYMBOL(tc_classify_compat); |
| 1629 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1630 | int tc_classify(struct sk_buff *skb, struct tcf_proto *tp, |
Patrick McHardy | 73ca491 | 2007-07-15 00:02:31 -0700 | [diff] [blame] | 1631 | struct tcf_result *res) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1632 | { |
| 1633 | int err = 0; |
Patrick McHardy | 73ca491 | 2007-07-15 00:02:31 -0700 | [diff] [blame] | 1634 | __be16 protocol; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1635 | #ifdef CONFIG_NET_CLS_ACT |
| 1636 | struct tcf_proto *otp = tp; |
| 1637 | reclassify: |
| 1638 | #endif |
| 1639 | protocol = skb->protocol; |
| 1640 | |
Patrick McHardy | 73ca491 | 2007-07-15 00:02:31 -0700 | [diff] [blame] | 1641 | err = tc_classify_compat(skb, tp, res); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1642 | #ifdef CONFIG_NET_CLS_ACT |
Patrick McHardy | 73ca491 | 2007-07-15 00:02:31 -0700 | [diff] [blame] | 1643 | if (err == TC_ACT_RECLASSIFY) { |
| 1644 | u32 verd = G_TC_VERD(skb->tc_verd); |
| 1645 | tp = otp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1646 | |
Patrick McHardy | 73ca491 | 2007-07-15 00:02:31 -0700 | [diff] [blame] | 1647 | if (verd++ >= MAX_REC_LOOP) { |
| 1648 | printk("rule prio %u protocol %02x reclassify loop, " |
| 1649 | "packet dropped\n", |
| 1650 | tp->prio&0xffff, ntohs(tp->protocol)); |
| 1651 | return TC_ACT_SHOT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1652 | } |
Patrick McHardy | 73ca491 | 2007-07-15 00:02:31 -0700 | [diff] [blame] | 1653 | skb->tc_verd = SET_TC_VERD(skb->tc_verd, verd); |
| 1654 | goto reclassify; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1655 | } |
Patrick McHardy | 73ca491 | 2007-07-15 00:02:31 -0700 | [diff] [blame] | 1656 | #endif |
| 1657 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1658 | } |
Patrick McHardy | 73ca491 | 2007-07-15 00:02:31 -0700 | [diff] [blame] | 1659 | EXPORT_SYMBOL(tc_classify); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1660 | |
Patrick McHardy | a48b5a6 | 2007-03-23 11:29:43 -0700 | [diff] [blame] | 1661 | void tcf_destroy(struct tcf_proto *tp) |
| 1662 | { |
| 1663 | tp->ops->destroy(tp); |
| 1664 | module_put(tp->ops->owner); |
| 1665 | kfree(tp); |
| 1666 | } |
| 1667 | |
Patrick McHardy | ff31ab5 | 2008-07-01 19:52:38 -0700 | [diff] [blame] | 1668 | void tcf_destroy_chain(struct tcf_proto **fl) |
Patrick McHardy | a48b5a6 | 2007-03-23 11:29:43 -0700 | [diff] [blame] | 1669 | { |
| 1670 | struct tcf_proto *tp; |
| 1671 | |
Patrick McHardy | ff31ab5 | 2008-07-01 19:52:38 -0700 | [diff] [blame] | 1672 | while ((tp = *fl) != NULL) { |
| 1673 | *fl = tp->next; |
Patrick McHardy | a48b5a6 | 2007-03-23 11:29:43 -0700 | [diff] [blame] | 1674 | tcf_destroy(tp); |
| 1675 | } |
| 1676 | } |
| 1677 | EXPORT_SYMBOL(tcf_destroy_chain); |
| 1678 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1679 | #ifdef CONFIG_PROC_FS |
| 1680 | static int psched_show(struct seq_file *seq, void *v) |
| 1681 | { |
Patrick McHardy | 3c0cfc1 | 2007-10-10 16:32:41 -0700 | [diff] [blame] | 1682 | struct timespec ts; |
| 1683 | |
| 1684 | hrtimer_get_res(CLOCK_MONOTONIC, &ts); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1685 | seq_printf(seq, "%08x %08x %08x %08x\n", |
Jarek Poplawski | ca44d6e | 2009-06-15 02:31:47 -0700 | [diff] [blame] | 1686 | (u32)NSEC_PER_USEC, (u32)PSCHED_TICKS2NS(1), |
Patrick McHardy | 514bca3 | 2007-03-16 12:34:52 -0700 | [diff] [blame] | 1687 | 1000000, |
Patrick McHardy | 3c0cfc1 | 2007-10-10 16:32:41 -0700 | [diff] [blame] | 1688 | (u32)NSEC_PER_SEC/(u32)ktime_to_ns(timespec_to_ktime(ts))); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1689 | |
| 1690 | return 0; |
| 1691 | } |
| 1692 | |
| 1693 | static int psched_open(struct inode *inode, struct file *file) |
| 1694 | { |
| 1695 | return single_open(file, psched_show, PDE(inode)->data); |
| 1696 | } |
| 1697 | |
Arjan van de Ven | da7071d | 2007-02-12 00:55:36 -0800 | [diff] [blame] | 1698 | static const struct file_operations psched_fops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1699 | .owner = THIS_MODULE, |
| 1700 | .open = psched_open, |
| 1701 | .read = seq_read, |
| 1702 | .llseek = seq_lseek, |
| 1703 | .release = single_release, |
YOSHIFUJI Hideaki | 10297b9 | 2007-02-09 23:25:16 +0900 | [diff] [blame] | 1704 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1705 | #endif |
| 1706 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1707 | static int __init pktsched_init(void) |
| 1708 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1709 | register_qdisc(&pfifo_qdisc_ops); |
| 1710 | register_qdisc(&bfifo_qdisc_ops); |
Hagen Paul Pfeifer | 57dbb2d | 2010-01-24 12:30:59 +0000 | [diff] [blame] | 1711 | register_qdisc(&pfifo_head_drop_qdisc_ops); |
David S. Miller | 6ec1c69 | 2009-09-06 01:58:51 -0700 | [diff] [blame] | 1712 | register_qdisc(&mq_qdisc_ops); |
Eric W. Biederman | 457c4cb | 2007-09-12 12:01:34 +0200 | [diff] [blame] | 1713 | proc_net_fops_create(&init_net, "psched", 0, &psched_fops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1714 | |
Thomas Graf | be577dd | 2007-03-22 11:55:50 -0700 | [diff] [blame] | 1715 | rtnl_register(PF_UNSPEC, RTM_NEWQDISC, tc_modify_qdisc, NULL); |
| 1716 | rtnl_register(PF_UNSPEC, RTM_DELQDISC, tc_get_qdisc, NULL); |
| 1717 | rtnl_register(PF_UNSPEC, RTM_GETQDISC, tc_get_qdisc, tc_dump_qdisc); |
| 1718 | rtnl_register(PF_UNSPEC, RTM_NEWTCLASS, tc_ctl_tclass, NULL); |
| 1719 | rtnl_register(PF_UNSPEC, RTM_DELTCLASS, tc_ctl_tclass, NULL); |
| 1720 | rtnl_register(PF_UNSPEC, RTM_GETTCLASS, tc_ctl_tclass, tc_dump_tclass); |
| 1721 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1722 | return 0; |
| 1723 | } |
| 1724 | |
| 1725 | subsys_initcall(pktsched_init); |