blob: 3fe49d808957309f29f1cb9532892fc06e936f2e [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001#ifndef __NET_SCHED_GENERIC_H
2#define __NET_SCHED_GENERIC_H
3
Linus Torvalds1da177e2005-04-16 15:20:36 -07004#include <linux/netdevice.h>
5#include <linux/types.h>
6#include <linux/rcupdate.h>
7#include <linux/module.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -07008#include <linux/pkt_sched.h>
9#include <linux/pkt_cls.h>
10#include <net/gen_stats.h>
Thomas Grafbe577dd2007-03-22 11:55:50 -070011#include <net/rtnetlink.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070012
13struct Qdisc_ops;
14struct qdisc_walker;
15struct tcf_walker;
16struct module;
17
18struct qdisc_rate_table
19{
20 struct tc_ratespec rate;
21 u32 data[256];
22 struct qdisc_rate_table *next;
23 int refcnt;
24};
25
David S. Millere2627c82008-07-16 00:56:32 -070026enum qdisc_state_t
27{
28 __QDISC_STATE_RUNNING,
David S. Miller37437bb2008-07-16 02:15:04 -070029 __QDISC_STATE_SCHED,
David S. Millera9312ae2008-08-17 21:51:03 -070030 __QDISC_STATE_DEACTIVATED,
David S. Millere2627c82008-07-16 00:56:32 -070031};
32
Jussi Kivilinna175f9c12008-07-20 00:08:47 -070033struct qdisc_size_table {
34 struct list_head list;
35 struct tc_sizespec szopts;
36 int refcnt;
37 u16 data[];
38};
39
Linus Torvalds1da177e2005-04-16 15:20:36 -070040struct Qdisc
41{
42 int (*enqueue)(struct sk_buff *skb, struct Qdisc *dev);
43 struct sk_buff * (*dequeue)(struct Qdisc *dev);
44 unsigned flags;
45#define TCQ_F_BUILTIN 1
46#define TCQ_F_THROTTLED 2
47#define TCQ_F_INGRESS 4
48 int padded;
49 struct Qdisc_ops *ops;
Jussi Kivilinna175f9c12008-07-20 00:08:47 -070050 struct qdisc_size_table *stab;
Linus Torvalds1da177e2005-04-16 15:20:36 -070051 u32 handle;
52 u32 parent;
53 atomic_t refcnt;
David S. Millere2627c82008-07-16 00:56:32 -070054 unsigned long state;
Jarek Poplawski554794d2008-10-06 09:54:39 -070055 struct sk_buff *gso_skb;
David S. Miller242f8bf2008-09-22 22:15:30 -070056 struct sk_buff_head requeue;
Linus Torvalds1da177e2005-04-16 15:20:36 -070057 struct sk_buff_head q;
David S. Millerbb949fb2008-07-08 16:55:56 -070058 struct netdev_queue *dev_queue;
David S. Miller37437bb2008-07-16 02:15:04 -070059 struct Qdisc *next_sched;
Linus Torvalds1da177e2005-04-16 15:20:36 -070060 struct list_head list;
61
62 struct gnet_stats_basic bstats;
63 struct gnet_stats_queue qstats;
64 struct gnet_stats_rate_est rate_est;
Linus Torvalds1da177e2005-04-16 15:20:36 -070065 int (*reshape_fail)(struct sk_buff *skb,
66 struct Qdisc *q);
67
David S. Miller72b25a92008-07-18 20:54:17 -070068 void *u32_node;
69
Linus Torvalds1da177e2005-04-16 15:20:36 -070070 /* This field is deprecated, but it is still used by CBQ
71 * and it will live until better solution will be invented.
72 */
73 struct Qdisc *__parent;
74};
75
76struct Qdisc_class_ops
77{
78 /* Child qdisc manipulation */
79 int (*graft)(struct Qdisc *, unsigned long cl,
80 struct Qdisc *, struct Qdisc **);
81 struct Qdisc * (*leaf)(struct Qdisc *, unsigned long cl);
Patrick McHardy43effa12006-11-29 17:35:48 -080082 void (*qlen_notify)(struct Qdisc *, unsigned long);
Linus Torvalds1da177e2005-04-16 15:20:36 -070083
84 /* Class manipulation routines */
85 unsigned long (*get)(struct Qdisc *, u32 classid);
86 void (*put)(struct Qdisc *, unsigned long);
87 int (*change)(struct Qdisc *, u32, u32,
Patrick McHardy1e904742008-01-22 22:11:17 -080088 struct nlattr **, unsigned long *);
Linus Torvalds1da177e2005-04-16 15:20:36 -070089 int (*delete)(struct Qdisc *, unsigned long);
90 void (*walk)(struct Qdisc *, struct qdisc_walker * arg);
91
92 /* Filter manipulation */
93 struct tcf_proto ** (*tcf_chain)(struct Qdisc *, unsigned long);
94 unsigned long (*bind_tcf)(struct Qdisc *, unsigned long,
95 u32 classid);
96 void (*unbind_tcf)(struct Qdisc *, unsigned long);
97
98 /* rtnetlink specific */
99 int (*dump)(struct Qdisc *, unsigned long,
100 struct sk_buff *skb, struct tcmsg*);
101 int (*dump_stats)(struct Qdisc *, unsigned long,
102 struct gnet_dump *);
103};
104
105struct Qdisc_ops
106{
107 struct Qdisc_ops *next;
Eric Dumazet20fea082007-11-14 01:44:41 -0800108 const struct Qdisc_class_ops *cl_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700109 char id[IFNAMSIZ];
110 int priv_size;
111
112 int (*enqueue)(struct sk_buff *, struct Qdisc *);
113 struct sk_buff * (*dequeue)(struct Qdisc *);
114 int (*requeue)(struct sk_buff *, struct Qdisc *);
115 unsigned int (*drop)(struct Qdisc *);
116
Patrick McHardy1e904742008-01-22 22:11:17 -0800117 int (*init)(struct Qdisc *, struct nlattr *arg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700118 void (*reset)(struct Qdisc *);
119 void (*destroy)(struct Qdisc *);
Patrick McHardy1e904742008-01-22 22:11:17 -0800120 int (*change)(struct Qdisc *, struct nlattr *arg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700121
122 int (*dump)(struct Qdisc *, struct sk_buff *);
123 int (*dump_stats)(struct Qdisc *, struct gnet_dump *);
124
125 struct module *owner;
126};
127
128
129struct tcf_result
130{
131 unsigned long class;
132 u32 classid;
133};
134
135struct tcf_proto_ops
136{
137 struct tcf_proto_ops *next;
138 char kind[IFNAMSIZ];
139
140 int (*classify)(struct sk_buff*, struct tcf_proto*,
141 struct tcf_result *);
142 int (*init)(struct tcf_proto*);
143 void (*destroy)(struct tcf_proto*);
144
145 unsigned long (*get)(struct tcf_proto*, u32 handle);
146 void (*put)(struct tcf_proto*, unsigned long);
147 int (*change)(struct tcf_proto*, unsigned long,
Patrick McHardyadd93b62008-01-22 22:11:33 -0800148 u32 handle, struct nlattr **,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149 unsigned long *);
150 int (*delete)(struct tcf_proto*, unsigned long);
151 void (*walk)(struct tcf_proto*, struct tcf_walker *arg);
152
153 /* rtnetlink specific */
154 int (*dump)(struct tcf_proto*, unsigned long,
155 struct sk_buff *skb, struct tcmsg*);
156
157 struct module *owner;
158};
159
160struct tcf_proto
161{
162 /* Fast access part */
163 struct tcf_proto *next;
164 void *root;
165 int (*classify)(struct sk_buff*, struct tcf_proto*,
166 struct tcf_result *);
Al Viro66c6f522006-11-20 18:07:51 -0800167 __be16 protocol;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700168
169 /* All the rest */
170 u32 prio;
171 u32 classid;
172 struct Qdisc *q;
173 void *data;
174 struct tcf_proto_ops *ops;
175};
176
Jussi Kivilinna175f9c12008-07-20 00:08:47 -0700177struct qdisc_skb_cb {
178 unsigned int pkt_len;
179 char data[];
180};
181
182static inline struct qdisc_skb_cb *qdisc_skb_cb(struct sk_buff *skb)
183{
184 return (struct qdisc_skb_cb *)skb->cb;
185}
186
David S. Miller83874002008-07-17 00:53:03 -0700187static inline spinlock_t *qdisc_lock(struct Qdisc *qdisc)
188{
189 return &qdisc->q.lock;
190}
191
David S. Miller7698b4f2008-07-16 01:42:40 -0700192static inline struct Qdisc *qdisc_root(struct Qdisc *qdisc)
193{
194 return qdisc->dev_queue->qdisc;
195}
196
Jarek Poplawski2540e052008-08-21 05:11:14 -0700197static inline struct Qdisc *qdisc_root_sleeping(struct Qdisc *qdisc)
198{
199 return qdisc->dev_queue->qdisc_sleeping;
200}
201
David S. Miller7e43f112008-08-02 23:27:37 -0700202/* The qdisc root lock is a mechanism by which to top level
203 * of a qdisc tree can be locked from any qdisc node in the
204 * forest. This allows changing the configuration of some
205 * aspect of the qdisc tree while blocking out asynchronous
206 * qdisc access in the packet processing paths.
207 *
208 * It is only legal to do this when the root will not change
209 * on us. Otherwise we'll potentially lock the wrong qdisc
210 * root. This is enforced by holding the RTNL semaphore, which
211 * all users of this lock accessor must do.
212 */
David S. Miller7698b4f2008-07-16 01:42:40 -0700213static inline spinlock_t *qdisc_root_lock(struct Qdisc *qdisc)
214{
215 struct Qdisc *root = qdisc_root(qdisc);
216
David S. Miller7e43f112008-08-02 23:27:37 -0700217 ASSERT_RTNL();
David S. Miller83874002008-07-17 00:53:03 -0700218 return qdisc_lock(root);
David S. Miller7698b4f2008-07-16 01:42:40 -0700219}
220
Jarek Poplawskif6f9b932008-08-27 02:25:17 -0700221static inline spinlock_t *qdisc_root_sleeping_lock(struct Qdisc *qdisc)
222{
223 struct Qdisc *root = qdisc_root_sleeping(qdisc);
224
225 ASSERT_RTNL();
226 return qdisc_lock(root);
227}
228
David S. Miller5ce2d482008-07-08 17:06:30 -0700229static inline struct net_device *qdisc_dev(struct Qdisc *qdisc)
230{
231 return qdisc->dev_queue->dev;
232}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700233
David S. Miller78a5b302008-07-16 03:12:24 -0700234static inline void sch_tree_lock(struct Qdisc *q)
235{
Jarek Poplawskife439dd2008-08-27 02:27:10 -0700236 spin_lock_bh(qdisc_root_sleeping_lock(q));
David S. Miller78a5b302008-07-16 03:12:24 -0700237}
238
239static inline void sch_tree_unlock(struct Qdisc *q)
240{
Jarek Poplawskife439dd2008-08-27 02:27:10 -0700241 spin_unlock_bh(qdisc_root_sleeping_lock(q));
David S. Miller78a5b302008-07-16 03:12:24 -0700242}
243
244#define tcf_tree_lock(tp) sch_tree_lock((tp)->q)
245#define tcf_tree_unlock(tp) sch_tree_unlock((tp)->q)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246
Thomas Grafe41a33e2005-07-05 14:14:30 -0700247extern struct Qdisc noop_qdisc;
248extern struct Qdisc_ops noop_qdisc_ops;
249
Patrick McHardy6fe1c7a2008-07-05 23:21:31 -0700250struct Qdisc_class_common
251{
252 u32 classid;
253 struct hlist_node hnode;
254};
255
256struct Qdisc_class_hash
257{
258 struct hlist_head *hash;
259 unsigned int hashsize;
260 unsigned int hashmask;
261 unsigned int hashelems;
262};
263
264static inline unsigned int qdisc_class_hash(u32 id, u32 mask)
265{
266 id ^= id >> 8;
267 id ^= id >> 4;
268 return id & mask;
269}
270
271static inline struct Qdisc_class_common *
272qdisc_class_find(struct Qdisc_class_hash *hash, u32 id)
273{
274 struct Qdisc_class_common *cl;
275 struct hlist_node *n;
276 unsigned int h;
277
278 h = qdisc_class_hash(id, hash->hashmask);
279 hlist_for_each_entry(cl, n, &hash->hash[h], hnode) {
280 if (cl->classid == id)
281 return cl;
282 }
283 return NULL;
284}
285
286extern int qdisc_class_hash_init(struct Qdisc_class_hash *);
287extern void qdisc_class_hash_insert(struct Qdisc_class_hash *, struct Qdisc_class_common *);
288extern void qdisc_class_hash_remove(struct Qdisc_class_hash *, struct Qdisc_class_common *);
289extern void qdisc_class_hash_grow(struct Qdisc *, struct Qdisc_class_hash *);
290extern void qdisc_class_hash_destroy(struct Qdisc_class_hash *);
291
Thomas Grafe41a33e2005-07-05 14:14:30 -0700292extern void dev_init_scheduler(struct net_device *dev);
293extern void dev_shutdown(struct net_device *dev);
294extern void dev_activate(struct net_device *dev);
295extern void dev_deactivate(struct net_device *dev);
296extern void qdisc_reset(struct Qdisc *qdisc);
297extern void qdisc_destroy(struct Qdisc *qdisc);
Patrick McHardy43effa12006-11-29 17:35:48 -0800298extern void qdisc_tree_decrease_qlen(struct Qdisc *qdisc, unsigned int n);
David S. Miller5ce2d482008-07-08 17:06:30 -0700299extern struct Qdisc *qdisc_alloc(struct netdev_queue *dev_queue,
David S. Millerbb949fb2008-07-08 16:55:56 -0700300 struct Qdisc_ops *ops);
Thomas Grafe41a33e2005-07-05 14:14:30 -0700301extern struct Qdisc *qdisc_create_dflt(struct net_device *dev,
David S. Millerbb949fb2008-07-08 16:55:56 -0700302 struct netdev_queue *dev_queue,
Patrick McHardy9f9afec2006-11-29 17:35:18 -0800303 struct Qdisc_ops *ops, u32 parentid);
Jussi Kivilinna175f9c12008-07-20 00:08:47 -0700304extern void qdisc_calculate_pkt_len(struct sk_buff *skb,
305 struct qdisc_size_table *stab);
Patrick McHardya48b5a62007-03-23 11:29:43 -0700306extern void tcf_destroy(struct tcf_proto *tp);
Patrick McHardyff31ab52008-07-01 19:52:38 -0700307extern void tcf_destroy_chain(struct tcf_proto **fl);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700308
David S. Miller5aa70992008-07-08 22:59:10 -0700309/* Reset all TX qdiscs of a device. */
310static inline void qdisc_reset_all_tx(struct net_device *dev)
311{
David S. Millere8a04642008-07-17 00:34:19 -0700312 unsigned int i;
313 for (i = 0; i < dev->num_tx_queues; i++)
314 qdisc_reset(netdev_get_tx_queue(dev, i)->qdisc);
David S. Miller5aa70992008-07-08 22:59:10 -0700315}
316
David S. Miller3e745dd2008-07-08 23:00:25 -0700317/* Are all TX queues of the device empty? */
318static inline bool qdisc_all_tx_empty(const struct net_device *dev)
319{
David S. Millere8a04642008-07-17 00:34:19 -0700320 unsigned int i;
321 for (i = 0; i < dev->num_tx_queues; i++) {
322 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
323 const struct Qdisc *q = txq->qdisc;
David S. Miller3e745dd2008-07-08 23:00:25 -0700324
David S. Millere8a04642008-07-17 00:34:19 -0700325 if (q->q.qlen)
326 return false;
327 }
328 return true;
David S. Miller3e745dd2008-07-08 23:00:25 -0700329}
330
David S. Miller6fa98642008-07-08 23:01:06 -0700331/* Are any of the TX qdiscs changing? */
332static inline bool qdisc_tx_changing(struct net_device *dev)
333{
David S. Millere8a04642008-07-17 00:34:19 -0700334 unsigned int i;
335 for (i = 0; i < dev->num_tx_queues; i++) {
336 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
337 if (txq->qdisc != txq->qdisc_sleeping)
338 return true;
339 }
340 return false;
David S. Miller6fa98642008-07-08 23:01:06 -0700341}
342
David S. Millere8a04642008-07-17 00:34:19 -0700343/* Is the device using the noop qdisc on all queues? */
David S. Miller05297942008-07-08 23:01:27 -0700344static inline bool qdisc_tx_is_noop(const struct net_device *dev)
345{
David S. Millere8a04642008-07-17 00:34:19 -0700346 unsigned int i;
347 for (i = 0; i < dev->num_tx_queues; i++) {
348 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
349 if (txq->qdisc != &noop_qdisc)
350 return false;
351 }
352 return true;
David S. Miller05297942008-07-08 23:01:27 -0700353}
354
Jussi Kivilinna0abf77e2008-07-20 00:08:27 -0700355static inline unsigned int qdisc_pkt_len(struct sk_buff *skb)
356{
Jussi Kivilinna175f9c12008-07-20 00:08:47 -0700357 return qdisc_skb_cb(skb)->pkt_len;
Jussi Kivilinna0abf77e2008-07-20 00:08:27 -0700358}
359
Jarek Poplawskic27f3392008-08-04 22:39:11 -0700360/* additional qdisc xmit flags (NET_XMIT_MASK in linux/netdevice.h) */
Jarek Poplawski378a2f02008-08-04 22:31:03 -0700361enum net_xmit_qdisc_t {
362 __NET_XMIT_STOLEN = 0x00010000,
Jarek Poplawskic27f3392008-08-04 22:39:11 -0700363 __NET_XMIT_BYPASS = 0x00020000,
Jarek Poplawski378a2f02008-08-04 22:31:03 -0700364};
365
Jarek Poplawskic27f3392008-08-04 22:39:11 -0700366#ifdef CONFIG_NET_CLS_ACT
Jarek Poplawski378a2f02008-08-04 22:31:03 -0700367#define net_xmit_drop_count(e) ((e) & __NET_XMIT_STOLEN ? 0 : 1)
Jarek Poplawski378a2f02008-08-04 22:31:03 -0700368#else
369#define net_xmit_drop_count(e) (1)
370#endif
371
Jussi Kivilinna5f861732008-07-20 00:08:04 -0700372static inline int qdisc_enqueue(struct sk_buff *skb, struct Qdisc *sch)
373{
David S. Miller3a682fb2008-07-20 18:13:01 -0700374#ifdef CONFIG_NET_SCHED
Jussi Kivilinna175f9c12008-07-20 00:08:47 -0700375 if (sch->stab)
376 qdisc_calculate_pkt_len(skb, sch->stab);
David S. Miller3a682fb2008-07-20 18:13:01 -0700377#endif
Jussi Kivilinna5f861732008-07-20 00:08:04 -0700378 return sch->enqueue(skb, sch);
379}
380
381static inline int qdisc_enqueue_root(struct sk_buff *skb, struct Qdisc *sch)
382{
Jussi Kivilinna175f9c12008-07-20 00:08:47 -0700383 qdisc_skb_cb(skb)->pkt_len = skb->len;
Jarek Poplawski378a2f02008-08-04 22:31:03 -0700384 return qdisc_enqueue(skb, sch) & NET_XMIT_MASK;
Jussi Kivilinna5f861732008-07-20 00:08:04 -0700385}
386
Thomas Graf9972b252005-06-18 22:57:26 -0700387static inline int __qdisc_enqueue_tail(struct sk_buff *skb, struct Qdisc *sch,
388 struct sk_buff_head *list)
389{
390 __skb_queue_tail(list, skb);
Jussi Kivilinna0abf77e2008-07-20 00:08:27 -0700391 sch->qstats.backlog += qdisc_pkt_len(skb);
392 sch->bstats.bytes += qdisc_pkt_len(skb);
Thomas Graf9972b252005-06-18 22:57:26 -0700393 sch->bstats.packets++;
394
395 return NET_XMIT_SUCCESS;
396}
397
398static inline int qdisc_enqueue_tail(struct sk_buff *skb, struct Qdisc *sch)
399{
400 return __qdisc_enqueue_tail(skb, sch, &sch->q);
401}
402
403static inline struct sk_buff *__qdisc_dequeue_head(struct Qdisc *sch,
404 struct sk_buff_head *list)
405{
406 struct sk_buff *skb = __skb_dequeue(list);
407
408 if (likely(skb != NULL))
Jussi Kivilinna0abf77e2008-07-20 00:08:27 -0700409 sch->qstats.backlog -= qdisc_pkt_len(skb);
Thomas Graf9972b252005-06-18 22:57:26 -0700410
411 return skb;
412}
413
414static inline struct sk_buff *qdisc_dequeue_head(struct Qdisc *sch)
415{
416 return __qdisc_dequeue_head(sch, &sch->q);
417}
418
419static inline struct sk_buff *__qdisc_dequeue_tail(struct Qdisc *sch,
420 struct sk_buff_head *list)
421{
422 struct sk_buff *skb = __skb_dequeue_tail(list);
423
424 if (likely(skb != NULL))
Jussi Kivilinna0abf77e2008-07-20 00:08:27 -0700425 sch->qstats.backlog -= qdisc_pkt_len(skb);
Thomas Graf9972b252005-06-18 22:57:26 -0700426
427 return skb;
428}
429
430static inline struct sk_buff *qdisc_dequeue_tail(struct Qdisc *sch)
431{
432 return __qdisc_dequeue_tail(sch, &sch->q);
433}
434
435static inline int __qdisc_requeue(struct sk_buff *skb, struct Qdisc *sch,
436 struct sk_buff_head *list)
437{
438 __skb_queue_head(list, skb);
Jussi Kivilinna0abf77e2008-07-20 00:08:27 -0700439 sch->qstats.backlog += qdisc_pkt_len(skb);
Thomas Graf9972b252005-06-18 22:57:26 -0700440 sch->qstats.requeues++;
441
442 return NET_XMIT_SUCCESS;
443}
444
445static inline int qdisc_requeue(struct sk_buff *skb, struct Qdisc *sch)
446{
447 return __qdisc_requeue(skb, sch, &sch->q);
448}
449
450static inline void __qdisc_reset_queue(struct Qdisc *sch,
451 struct sk_buff_head *list)
452{
453 /*
454 * We do not know the backlog in bytes of this list, it
455 * is up to the caller to correct it
456 */
David S. Miller93245dd2008-07-17 04:03:43 -0700457 __skb_queue_purge(list);
Thomas Graf9972b252005-06-18 22:57:26 -0700458}
459
460static inline void qdisc_reset_queue(struct Qdisc *sch)
461{
462 __qdisc_reset_queue(sch, &sch->q);
463 sch->qstats.backlog = 0;
464}
465
466static inline unsigned int __qdisc_queue_drop(struct Qdisc *sch,
467 struct sk_buff_head *list)
468{
469 struct sk_buff *skb = __qdisc_dequeue_tail(sch, list);
470
471 if (likely(skb != NULL)) {
Jussi Kivilinna0abf77e2008-07-20 00:08:27 -0700472 unsigned int len = qdisc_pkt_len(skb);
Thomas Graf9972b252005-06-18 22:57:26 -0700473 kfree_skb(skb);
474 return len;
475 }
476
477 return 0;
478}
479
480static inline unsigned int qdisc_queue_drop(struct Qdisc *sch)
481{
482 return __qdisc_queue_drop(sch, &sch->q);
483}
484
485static inline int qdisc_drop(struct sk_buff *skb, struct Qdisc *sch)
486{
487 kfree_skb(skb);
488 sch->qstats.drops++;
489
490 return NET_XMIT_DROP;
491}
492
493static inline int qdisc_reshape_fail(struct sk_buff *skb, struct Qdisc *sch)
494{
495 sch->qstats.drops++;
496
Patrick McHardyc3bc7cf2007-07-15 00:03:05 -0700497#ifdef CONFIG_NET_CLS_ACT
Thomas Graf9972b252005-06-18 22:57:26 -0700498 if (sch->reshape_fail == NULL || sch->reshape_fail(skb, sch))
499 goto drop;
500
501 return NET_XMIT_SUCCESS;
502
503drop:
504#endif
505 kfree_skb(skb);
506 return NET_XMIT_DROP;
507}
508
Jesper Dangaard Brouere9bef552007-09-12 16:35:24 +0200509/* Length to Time (L2T) lookup in a qdisc_rate_table, to determine how
510 long it will take to send a packet given its size.
511 */
512static inline u32 qdisc_l2t(struct qdisc_rate_table* rtab, unsigned int pktlen)
513{
Jesper Dangaard Brouere08b0992007-09-12 16:36:28 +0200514 int slot = pktlen + rtab->rate.cell_align + rtab->rate.overhead;
515 if (slot < 0)
516 slot = 0;
Jesper Dangaard Brouere9bef552007-09-12 16:35:24 +0200517 slot >>= rtab->rate.cell_log;
518 if (slot > 255)
519 return (rtab->data[255]*(slot >> 8) + rtab->data[slot & 0xFF]);
520 return rtab->data[slot];
521}
522
Jamal Hadi Salim12da81d2007-10-26 02:47:23 -0700523#ifdef CONFIG_NET_CLS_ACT
524static inline struct sk_buff *skb_act_clone(struct sk_buff *skb, gfp_t gfp_mask)
525{
526 struct sk_buff *n = skb_clone(skb, gfp_mask);
527
528 if (n) {
529 n->tc_verd = SET_TC_VERD(n->tc_verd, 0);
530 n->tc_verd = CLR_TC_OK2MUNGE(n->tc_verd);
531 n->tc_verd = CLR_TC_MUNGED(n->tc_verd);
Jamal Hadi Salim12da81d2007-10-26 02:47:23 -0700532 }
533 return n;
534}
535#endif
536
Linus Torvalds1da177e2005-04-16 15:20:36 -0700537#endif