blob: e6aa0a249672a802dce583166f4f808154b77a96 [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>
Linus Torvalds1da177e2005-04-16 15:20:36 -07007#include <linux/pkt_sched.h>
8#include <linux/pkt_cls.h>
John Fastabend22e0f8b2014-09-28 11:52:56 -07009#include <linux/percpu.h>
Jesper Dangaard Brouer5772e9a2014-10-01 22:35:59 +020010#include <linux/dynamic_queue_limits.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070011#include <net/gen_stats.h>
Thomas Grafbe577dd2007-03-22 11:55:50 -070012#include <net/rtnetlink.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070013
14struct Qdisc_ops;
15struct qdisc_walker;
16struct tcf_walker;
17struct module;
18
Eric Dumazetfd2c3ef2009-11-03 03:26:03 +000019struct qdisc_rate_table {
Linus Torvalds1da177e2005-04-16 15:20:36 -070020 struct tc_ratespec rate;
21 u32 data[256];
22 struct qdisc_rate_table *next;
23 int refcnt;
24};
25
Eric Dumazetfd2c3ef2009-11-03 03:26:03 +000026enum qdisc_state_t {
David S. Miller37437bb2008-07-16 02:15:04 -070027 __QDISC_STATE_SCHED,
David S. Millera9312ae2008-08-17 21:51:03 -070028 __QDISC_STATE_DEACTIVATED,
David S. Millere2627c82008-07-16 00:56:32 -070029};
30
Jussi Kivilinna175f9c12008-07-20 00:08:47 -070031struct qdisc_size_table {
Eric Dumazeta2da5702011-01-20 03:48:19 +000032 struct rcu_head rcu;
Jussi Kivilinna175f9c12008-07-20 00:08:47 -070033 struct list_head list;
34 struct tc_sizespec szopts;
35 int refcnt;
36 u16 data[];
37};
38
Florian Westphal48da34b2016-09-18 00:57:34 +020039/* similar to sk_buff_head, but skb->prev pointer is undefined. */
40struct qdisc_skb_head {
41 struct sk_buff *head;
42 struct sk_buff *tail;
43 __u32 qlen;
44 spinlock_t lock;
45};
46
Eric Dumazetfd2c3ef2009-11-03 03:26:03 +000047struct Qdisc {
Eric Dumazet520ac302016-06-21 23:16:49 -070048 int (*enqueue)(struct sk_buff *skb,
49 struct Qdisc *sch,
50 struct sk_buff **to_free);
51 struct sk_buff * (*dequeue)(struct Qdisc *sch);
Eric Dumazet05bdd2f2011-10-20 17:45:43 -040052 unsigned int flags;
Jarek Poplawskib00355d2009-02-01 01:12:42 -080053#define TCQ_F_BUILTIN 1
Eric Dumazetfd245a42011-01-20 05:27:16 +000054#define TCQ_F_INGRESS 2
55#define TCQ_F_CAN_BYPASS 4
56#define TCQ_F_MQROOT 8
Eric Dumazet1abbe132012-12-11 15:54:33 +000057#define TCQ_F_ONETXQUEUE 0x10 /* dequeue_skb() can assume all skbs are for
58 * q->dev_queue : It can test
59 * netif_xmit_frozen_or_stopped() before
60 * dequeueing next packet.
61 * Its true for MQ/MQPRIO slaves, or non
62 * multiqueue device.
63 */
Jarek Poplawskib00355d2009-02-01 01:12:42 -080064#define TCQ_F_WARN_NONWC (1 << 16)
John Fastabend22e0f8b2014-09-28 11:52:56 -070065#define TCQ_F_CPUSTATS 0x20 /* run using percpu statistics */
Eric Dumazet4eaf3b82015-12-01 20:08:51 -080066#define TCQ_F_NOPARENT 0x40 /* root of its hierarchy :
67 * qdisc_tree_decrease_qlen() should stop.
68 */
Eric Dumazet45203a32013-06-06 08:43:22 -070069 u32 limit;
Eric Dumazet05bdd2f2011-10-20 17:45:43 -040070 const struct Qdisc_ops *ops;
Eric Dumazeta2da5702011-01-20 03:48:19 +000071 struct qdisc_size_table __rcu *stab;
Jiri Kosina59cc1f62016-08-10 11:05:15 +020072 struct hlist_node hash;
Linus Torvalds1da177e2005-04-16 15:20:36 -070073 u32 handle;
74 u32 parent;
David S. Miller72b25a92008-07-18 20:54:17 -070075 void *u32_node;
76
Eric Dumazet5e140df2009-03-20 01:33:32 -070077 struct netdev_queue *dev_queue;
Eric Dumazet5e140df2009-03-20 01:33:32 -070078
Eric Dumazet45203a32013-06-06 08:43:22 -070079 struct gnet_stats_rate_est64 rate_est;
Eric Dumazet0d32ef82015-01-29 17:30:12 -080080 struct gnet_stats_basic_cpu __percpu *cpu_bstats;
81 struct gnet_stats_queue __percpu *cpu_qstats;
82
Eric Dumazet5e140df2009-03-20 01:33:32 -070083 /*
84 * For performance sake on SMP, we put highly modified fields at the end
85 */
Eric Dumazet4d202a02016-06-21 23:16:52 -070086 struct sk_buff *gso_skb ____cacheline_aligned_in_smp;
Florian Westphal48da34b2016-09-18 00:57:34 +020087 struct qdisc_skb_head q;
Eric Dumazet0d32ef82015-01-29 17:30:12 -080088 struct gnet_stats_basic_packed bstats;
Eric Dumazetf9eb8ae2016-06-06 09:37:15 -070089 seqcount_t running;
Eric Dumazet0d32ef82015-01-29 17:30:12 -080090 struct gnet_stats_queue qstats;
Eric Dumazet4d202a02016-06-21 23:16:52 -070091 unsigned long state;
92 struct Qdisc *next_sched;
93 struct sk_buff *skb_bad_txq;
Eric Dumazet79640a42010-06-02 05:09:29 -070094 struct rcu_head rcu_head;
Eric Dumazet45203a32013-06-06 08:43:22 -070095 int padded;
96 atomic_t refcnt;
97
98 spinlock_t busylock ____cacheline_aligned_in_smp;
Linus Torvalds1da177e2005-04-16 15:20:36 -070099};
100
Eric Dumazetfd245a42011-01-20 05:27:16 +0000101static inline bool qdisc_is_running(const struct Qdisc *qdisc)
Eric Dumazetbc135b22010-06-02 03:23:51 -0700102{
Eric Dumazetf9eb8ae2016-06-06 09:37:15 -0700103 return (raw_read_seqcount(&qdisc->running) & 1) ? true : false;
Eric Dumazetbc135b22010-06-02 03:23:51 -0700104}
105
106static inline bool qdisc_run_begin(struct Qdisc *qdisc)
107{
Eric Dumazetfd245a42011-01-20 05:27:16 +0000108 if (qdisc_is_running(qdisc))
109 return false;
Eric Dumazet52fbb292016-06-09 07:45:11 -0700110 /* Variant of write_seqcount_begin() telling lockdep a trylock
111 * was attempted.
112 */
113 raw_write_seqcount_begin(&qdisc->running);
114 seqcount_acquire(&qdisc->running.dep_map, 0, 1, _RET_IP_);
Eric Dumazetfd245a42011-01-20 05:27:16 +0000115 return true;
Eric Dumazetbc135b22010-06-02 03:23:51 -0700116}
117
118static inline void qdisc_run_end(struct Qdisc *qdisc)
119{
Eric Dumazetf9eb8ae2016-06-06 09:37:15 -0700120 write_seqcount_end(&qdisc->running);
Eric Dumazetfd245a42011-01-20 05:27:16 +0000121}
122
Jesper Dangaard Brouer5772e9a2014-10-01 22:35:59 +0200123static inline bool qdisc_may_bulk(const struct Qdisc *qdisc)
124{
125 return qdisc->flags & TCQ_F_ONETXQUEUE;
126}
127
128static inline int qdisc_avail_bulklimit(const struct netdev_queue *txq)
129{
130#ifdef CONFIG_BQL
131 /* Non-BQL migrated drivers will return 0, too. */
132 return dql_avail(&txq->dql);
133#else
134 return 0;
135#endif
136}
137
Eric Dumazetfd2c3ef2009-11-03 03:26:03 +0000138struct Qdisc_class_ops {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700139 /* Child qdisc manipulation */
Jarek Poplawski926e61b2009-09-15 02:53:07 -0700140 struct netdev_queue * (*select_queue)(struct Qdisc *, struct tcmsg *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700141 int (*graft)(struct Qdisc *, unsigned long cl,
142 struct Qdisc *, struct Qdisc **);
143 struct Qdisc * (*leaf)(struct Qdisc *, unsigned long cl);
Patrick McHardy43effa12006-11-29 17:35:48 -0800144 void (*qlen_notify)(struct Qdisc *, unsigned long);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700145
146 /* Class manipulation routines */
147 unsigned long (*get)(struct Qdisc *, u32 classid);
148 void (*put)(struct Qdisc *, unsigned long);
149 int (*change)(struct Qdisc *, u32, u32,
Patrick McHardy1e904742008-01-22 22:11:17 -0800150 struct nlattr **, unsigned long *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700151 int (*delete)(struct Qdisc *, unsigned long);
152 void (*walk)(struct Qdisc *, struct qdisc_walker * arg);
153
154 /* Filter manipulation */
John Fastabend25d8c0d2014-09-12 20:05:27 -0700155 struct tcf_proto __rcu ** (*tcf_chain)(struct Qdisc *, unsigned long);
Daniel Borkmann92c075d2016-06-06 22:50:39 +0200156 bool (*tcf_cl_offload)(u32 classid);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700157 unsigned long (*bind_tcf)(struct Qdisc *, unsigned long,
158 u32 classid);
159 void (*unbind_tcf)(struct Qdisc *, unsigned long);
160
161 /* rtnetlink specific */
162 int (*dump)(struct Qdisc *, unsigned long,
163 struct sk_buff *skb, struct tcmsg*);
164 int (*dump_stats)(struct Qdisc *, unsigned long,
165 struct gnet_dump *);
166};
167
Eric Dumazetfd2c3ef2009-11-03 03:26:03 +0000168struct Qdisc_ops {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700169 struct Qdisc_ops *next;
Eric Dumazet20fea082007-11-14 01:44:41 -0800170 const struct Qdisc_class_ops *cl_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700171 char id[IFNAMSIZ];
172 int priv_size;
173
Eric Dumazet520ac302016-06-21 23:16:49 -0700174 int (*enqueue)(struct sk_buff *skb,
175 struct Qdisc *sch,
176 struct sk_buff **to_free);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700177 struct sk_buff * (*dequeue)(struct Qdisc *);
Jarek Poplawski90d841fd2008-10-31 00:43:45 -0700178 struct sk_buff * (*peek)(struct Qdisc *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700179
Patrick McHardy1e904742008-01-22 22:11:17 -0800180 int (*init)(struct Qdisc *, struct nlattr *arg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700181 void (*reset)(struct Qdisc *);
182 void (*destroy)(struct Qdisc *);
Patrick McHardy1e904742008-01-22 22:11:17 -0800183 int (*change)(struct Qdisc *, struct nlattr *arg);
David S. Miller6ec1c692009-09-06 01:58:51 -0700184 void (*attach)(struct Qdisc *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700185
186 int (*dump)(struct Qdisc *, struct sk_buff *);
187 int (*dump_stats)(struct Qdisc *, struct gnet_dump *);
188
189 struct module *owner;
190};
191
192
Eric Dumazetfd2c3ef2009-11-03 03:26:03 +0000193struct tcf_result {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700194 unsigned long class;
195 u32 classid;
196};
197
Eric Dumazetfd2c3ef2009-11-03 03:26:03 +0000198struct tcf_proto_ops {
WANG Cong36272872013-12-15 20:15:11 -0800199 struct list_head head;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700200 char kind[IFNAMSIZ];
201
Eric Dumazetdc7f9f62011-07-05 23:25:42 +0000202 int (*classify)(struct sk_buff *,
203 const struct tcf_proto *,
204 struct tcf_result *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700205 int (*init)(struct tcf_proto*);
Cong Wang1e052be2015-03-06 11:47:59 -0800206 bool (*destroy)(struct tcf_proto*, bool);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700207
208 unsigned long (*get)(struct tcf_proto*, u32 handle);
Benjamin LaHaisec1b52732013-01-14 05:15:39 +0000209 int (*change)(struct net *net, struct sk_buff *,
Eric W. Biedermanaf4c6642012-05-25 13:42:45 -0600210 struct tcf_proto*, unsigned long,
Patrick McHardyadd93b62008-01-22 22:11:33 -0800211 u32 handle, struct nlattr **,
Cong Wang2f7ef2f2014-04-25 13:54:06 -0700212 unsigned long *, bool);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700213 int (*delete)(struct tcf_proto*, unsigned long);
214 void (*walk)(struct tcf_proto*, struct tcf_walker *arg);
215
216 /* rtnetlink specific */
WANG Cong832d1d52014-01-09 16:14:01 -0800217 int (*dump)(struct net*, struct tcf_proto*, unsigned long,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700218 struct sk_buff *skb, struct tcmsg*);
219
220 struct module *owner;
221};
222
Eric Dumazetfd2c3ef2009-11-03 03:26:03 +0000223struct tcf_proto {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700224 /* Fast access part */
John Fastabend25d8c0d2014-09-12 20:05:27 -0700225 struct tcf_proto __rcu *next;
226 void __rcu *root;
Eric Dumazetdc7f9f62011-07-05 23:25:42 +0000227 int (*classify)(struct sk_buff *,
228 const struct tcf_proto *,
229 struct tcf_result *);
Al Viro66c6f522006-11-20 18:07:51 -0800230 __be16 protocol;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700231
232 /* All the rest */
233 u32 prio;
234 u32 classid;
235 struct Qdisc *q;
236 void *data;
Eric Dumazetdc7f9f62011-07-05 23:25:42 +0000237 const struct tcf_proto_ops *ops;
John Fastabend25d8c0d2014-09-12 20:05:27 -0700238 struct rcu_head rcu;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700239};
240
Jussi Kivilinna175f9c12008-07-20 00:08:47 -0700241struct qdisc_skb_cb {
242 unsigned int pkt_len;
Jiri Pirkodf4ab5b2012-07-20 02:28:49 +0000243 u16 slave_dev_queue_mapping;
Daniel Borkmann045efa82015-09-15 23:05:42 -0700244 u16 tc_classid;
Eric Dumazet25711782014-09-18 08:02:05 -0700245#define QDISC_CB_PRIV_LEN 20
246 unsigned char data[QDISC_CB_PRIV_LEN];
Jussi Kivilinna175f9c12008-07-20 00:08:47 -0700247};
248
David S. Miller16bda132012-02-06 15:14:37 -0500249static inline void qdisc_cb_private_validate(const struct sk_buff *skb, int sz)
250{
251 struct qdisc_skb_cb *qcb;
Eric Dumazet5ee31c682012-06-12 06:03:51 +0000252
253 BUILD_BUG_ON(sizeof(skb->cb) < offsetof(struct qdisc_skb_cb, data) + sz);
David S. Miller16bda132012-02-06 15:14:37 -0500254 BUILD_BUG_ON(sizeof(qcb->data) < sz);
255}
256
Eric Dumazet05bdd2f2011-10-20 17:45:43 -0400257static inline int qdisc_qlen(const struct Qdisc *q)
Krishna Kumarbbd8a0d2009-08-06 01:44:21 +0000258{
259 return q->q.qlen;
260}
261
Eric Dumazetbfe0d022011-01-09 08:30:54 +0000262static inline struct qdisc_skb_cb *qdisc_skb_cb(const struct sk_buff *skb)
Jussi Kivilinna175f9c12008-07-20 00:08:47 -0700263{
264 return (struct qdisc_skb_cb *)skb->cb;
265}
266
David S. Miller83874002008-07-17 00:53:03 -0700267static inline spinlock_t *qdisc_lock(struct Qdisc *qdisc)
268{
269 return &qdisc->q.lock;
270}
271
Eric Dumazet05bdd2f2011-10-20 17:45:43 -0400272static inline struct Qdisc *qdisc_root(const struct Qdisc *qdisc)
David S. Miller7698b4f2008-07-16 01:42:40 -0700273{
John Fastabend46e5da42014-09-12 20:04:52 -0700274 struct Qdisc *q = rcu_dereference_rtnl(qdisc->dev_queue->qdisc);
275
276 return q;
David S. Miller7698b4f2008-07-16 01:42:40 -0700277}
278
Eric Dumazet05bdd2f2011-10-20 17:45:43 -0400279static inline struct Qdisc *qdisc_root_sleeping(const struct Qdisc *qdisc)
Jarek Poplawski2540e052008-08-21 05:11:14 -0700280{
281 return qdisc->dev_queue->qdisc_sleeping;
282}
283
David S. Miller7e43f112008-08-02 23:27:37 -0700284/* The qdisc root lock is a mechanism by which to top level
285 * of a qdisc tree can be locked from any qdisc node in the
286 * forest. This allows changing the configuration of some
287 * aspect of the qdisc tree while blocking out asynchronous
288 * qdisc access in the packet processing paths.
289 *
290 * It is only legal to do this when the root will not change
291 * on us. Otherwise we'll potentially lock the wrong qdisc
292 * root. This is enforced by holding the RTNL semaphore, which
293 * all users of this lock accessor must do.
294 */
Eric Dumazet05bdd2f2011-10-20 17:45:43 -0400295static inline spinlock_t *qdisc_root_lock(const struct Qdisc *qdisc)
David S. Miller7698b4f2008-07-16 01:42:40 -0700296{
297 struct Qdisc *root = qdisc_root(qdisc);
298
David S. Miller7e43f112008-08-02 23:27:37 -0700299 ASSERT_RTNL();
David S. Miller83874002008-07-17 00:53:03 -0700300 return qdisc_lock(root);
David S. Miller7698b4f2008-07-16 01:42:40 -0700301}
302
Eric Dumazet05bdd2f2011-10-20 17:45:43 -0400303static inline spinlock_t *qdisc_root_sleeping_lock(const struct Qdisc *qdisc)
Jarek Poplawskif6f9b932008-08-27 02:25:17 -0700304{
305 struct Qdisc *root = qdisc_root_sleeping(qdisc);
306
307 ASSERT_RTNL();
308 return qdisc_lock(root);
309}
310
Eric Dumazetedb09eb2016-06-06 09:37:16 -0700311static inline seqcount_t *qdisc_root_sleeping_running(const struct Qdisc *qdisc)
312{
313 struct Qdisc *root = qdisc_root_sleeping(qdisc);
314
315 ASSERT_RTNL();
316 return &root->running;
317}
318
Eric Dumazet05bdd2f2011-10-20 17:45:43 -0400319static inline struct net_device *qdisc_dev(const struct Qdisc *qdisc)
David S. Miller5ce2d482008-07-08 17:06:30 -0700320{
321 return qdisc->dev_queue->dev;
322}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700323
Eric Dumazet05bdd2f2011-10-20 17:45:43 -0400324static inline void sch_tree_lock(const struct Qdisc *q)
David S. Miller78a5b302008-07-16 03:12:24 -0700325{
Jarek Poplawskife439dd2008-08-27 02:27:10 -0700326 spin_lock_bh(qdisc_root_sleeping_lock(q));
David S. Miller78a5b302008-07-16 03:12:24 -0700327}
328
Eric Dumazet05bdd2f2011-10-20 17:45:43 -0400329static inline void sch_tree_unlock(const struct Qdisc *q)
David S. Miller78a5b302008-07-16 03:12:24 -0700330{
Jarek Poplawskife439dd2008-08-27 02:27:10 -0700331 spin_unlock_bh(qdisc_root_sleeping_lock(q));
David S. Miller78a5b302008-07-16 03:12:24 -0700332}
333
334#define tcf_tree_lock(tp) sch_tree_lock((tp)->q)
335#define tcf_tree_unlock(tp) sch_tree_unlock((tp)->q)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700336
Thomas Grafe41a33e2005-07-05 14:14:30 -0700337extern struct Qdisc noop_qdisc;
338extern struct Qdisc_ops noop_qdisc_ops;
David S. Miller6ec1c692009-09-06 01:58:51 -0700339extern struct Qdisc_ops pfifo_fast_ops;
340extern struct Qdisc_ops mq_qdisc_ops;
Phil Sutterd66d6c32015-08-27 21:21:38 +0200341extern struct Qdisc_ops noqueue_qdisc_ops;
stephen hemminger6da7c8f2013-08-27 16:19:08 -0700342extern const struct Qdisc_ops *default_qdisc_ops;
Eric Dumazet1f27cde2016-03-02 08:21:43 -0800343static inline const struct Qdisc_ops *
344get_default_qdisc_ops(const struct net_device *dev, int ntx)
345{
346 return ntx < dev->real_num_tx_queues ?
347 default_qdisc_ops : &pfifo_fast_ops;
348}
Thomas Grafe41a33e2005-07-05 14:14:30 -0700349
Eric Dumazetfd2c3ef2009-11-03 03:26:03 +0000350struct Qdisc_class_common {
Patrick McHardy6fe1c7a2008-07-05 23:21:31 -0700351 u32 classid;
352 struct hlist_node hnode;
353};
354
Eric Dumazetfd2c3ef2009-11-03 03:26:03 +0000355struct Qdisc_class_hash {
Patrick McHardy6fe1c7a2008-07-05 23:21:31 -0700356 struct hlist_head *hash;
357 unsigned int hashsize;
358 unsigned int hashmask;
359 unsigned int hashelems;
360};
361
362static inline unsigned int qdisc_class_hash(u32 id, u32 mask)
363{
364 id ^= id >> 8;
365 id ^= id >> 4;
366 return id & mask;
367}
368
369static inline struct Qdisc_class_common *
Eric Dumazet05bdd2f2011-10-20 17:45:43 -0400370qdisc_class_find(const struct Qdisc_class_hash *hash, u32 id)
Patrick McHardy6fe1c7a2008-07-05 23:21:31 -0700371{
372 struct Qdisc_class_common *cl;
Patrick McHardy6fe1c7a2008-07-05 23:21:31 -0700373 unsigned int h;
374
375 h = qdisc_class_hash(id, hash->hashmask);
Sasha Levinb67bfe02013-02-27 17:06:00 -0800376 hlist_for_each_entry(cl, &hash->hash[h], hnode) {
Patrick McHardy6fe1c7a2008-07-05 23:21:31 -0700377 if (cl->classid == id)
378 return cl;
379 }
380 return NULL;
381}
382
Joe Perches5c152572013-07-30 22:47:13 -0700383int qdisc_class_hash_init(struct Qdisc_class_hash *);
384void qdisc_class_hash_insert(struct Qdisc_class_hash *,
385 struct Qdisc_class_common *);
386void qdisc_class_hash_remove(struct Qdisc_class_hash *,
387 struct Qdisc_class_common *);
388void qdisc_class_hash_grow(struct Qdisc *, struct Qdisc_class_hash *);
389void qdisc_class_hash_destroy(struct Qdisc_class_hash *);
Patrick McHardy6fe1c7a2008-07-05 23:21:31 -0700390
Joe Perches5c152572013-07-30 22:47:13 -0700391void dev_init_scheduler(struct net_device *dev);
392void dev_shutdown(struct net_device *dev);
393void dev_activate(struct net_device *dev);
394void dev_deactivate(struct net_device *dev);
395void dev_deactivate_many(struct list_head *head);
396struct Qdisc *dev_graft_qdisc(struct netdev_queue *dev_queue,
397 struct Qdisc *qdisc);
398void qdisc_reset(struct Qdisc *qdisc);
399void qdisc_destroy(struct Qdisc *qdisc);
WANG Cong2ccccf52016-02-25 14:55:01 -0800400void qdisc_tree_reduce_backlog(struct Qdisc *qdisc, unsigned int n,
401 unsigned int len);
Joe Perches5c152572013-07-30 22:47:13 -0700402struct Qdisc *qdisc_alloc(struct netdev_queue *dev_queue,
stephen hemmingerd2a7f262013-08-31 10:15:50 -0700403 const struct Qdisc_ops *ops);
Joe Perches5c152572013-07-30 22:47:13 -0700404struct Qdisc *qdisc_create_dflt(struct netdev_queue *dev_queue,
stephen hemmingerd2a7f262013-08-31 10:15:50 -0700405 const struct Qdisc_ops *ops, u32 parentid);
Joe Perches5c152572013-07-30 22:47:13 -0700406void __qdisc_calculate_pkt_len(struct sk_buff *skb,
407 const struct qdisc_size_table *stab);
Cong Wang1e052be2015-03-06 11:47:59 -0800408bool tcf_destroy(struct tcf_proto *tp, bool force);
John Fastabend25d8c0d2014-09-12 20:05:27 -0700409void tcf_destroy_chain(struct tcf_proto __rcu **fl);
Alexei Starovoitov27b29f62015-09-15 23:05:43 -0700410int skb_do_redirect(struct sk_buff *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700411
Daniel Borkmannfdc54322016-01-07 15:50:22 +0100412static inline bool skb_at_tc_ingress(const struct sk_buff *skb)
413{
414#ifdef CONFIG_NET_CLS_ACT
415 return G_TC_AT(skb->tc_verd) & AT_INGRESS;
416#else
417 return false;
418#endif
419}
420
John Fastabendf0796d52010-07-01 13:21:57 +0000421/* Reset all TX qdiscs greater then index of a device. */
422static inline void qdisc_reset_all_tx_gt(struct net_device *dev, unsigned int i)
David S. Miller5aa70992008-07-08 22:59:10 -0700423{
John Fastabend4ef6acf2010-07-01 13:21:35 +0000424 struct Qdisc *qdisc;
425
John Fastabendf0796d52010-07-01 13:21:57 +0000426 for (; i < dev->num_tx_queues; i++) {
John Fastabend46e5da42014-09-12 20:04:52 -0700427 qdisc = rtnl_dereference(netdev_get_tx_queue(dev, i)->qdisc);
John Fastabend4ef6acf2010-07-01 13:21:35 +0000428 if (qdisc) {
429 spin_lock_bh(qdisc_lock(qdisc));
430 qdisc_reset(qdisc);
431 spin_unlock_bh(qdisc_lock(qdisc));
432 }
433 }
David S. Miller5aa70992008-07-08 22:59:10 -0700434}
435
Linus Torvalds1da177e2005-04-16 15:20:36 -0700436static inline void qdisc_reset_all_tx(struct net_device *dev)
Thomas Graf9972b252005-06-18 22:57:26 -0700437{
John Fastabendf0796d52010-07-01 13:21:57 +0000438 qdisc_reset_all_tx_gt(dev, 0);
Thomas Graf9972b252005-06-18 22:57:26 -0700439}
440
David S. Miller3e745dd2008-07-08 23:00:25 -0700441/* Are all TX queues of the device empty? */
442static inline bool qdisc_all_tx_empty(const struct net_device *dev)
443{
David S. Millere8a04642008-07-17 00:34:19 -0700444 unsigned int i;
John Fastabend46e5da42014-09-12 20:04:52 -0700445
446 rcu_read_lock();
David S. Millere8a04642008-07-17 00:34:19 -0700447 for (i = 0; i < dev->num_tx_queues; i++) {
448 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
John Fastabend46e5da42014-09-12 20:04:52 -0700449 const struct Qdisc *q = rcu_dereference(txq->qdisc);
David S. Miller3e745dd2008-07-08 23:00:25 -0700450
John Fastabend46e5da42014-09-12 20:04:52 -0700451 if (q->q.qlen) {
452 rcu_read_unlock();
David S. Millere8a04642008-07-17 00:34:19 -0700453 return false;
John Fastabend46e5da42014-09-12 20:04:52 -0700454 }
David S. Millere8a04642008-07-17 00:34:19 -0700455 }
John Fastabend46e5da42014-09-12 20:04:52 -0700456 rcu_read_unlock();
David S. Millere8a04642008-07-17 00:34:19 -0700457 return true;
David S. Miller3e745dd2008-07-08 23:00:25 -0700458}
459
David S. Miller6fa98642008-07-08 23:01:06 -0700460/* Are any of the TX qdiscs changing? */
Eric Dumazet05bdd2f2011-10-20 17:45:43 -0400461static inline bool qdisc_tx_changing(const struct net_device *dev)
David S. Miller6fa98642008-07-08 23:01:06 -0700462{
David S. Millere8a04642008-07-17 00:34:19 -0700463 unsigned int i;
John Fastabend46e5da42014-09-12 20:04:52 -0700464
David S. Millere8a04642008-07-17 00:34:19 -0700465 for (i = 0; i < dev->num_tx_queues; i++) {
466 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
John Fastabend46e5da42014-09-12 20:04:52 -0700467 if (rcu_access_pointer(txq->qdisc) != txq->qdisc_sleeping)
David S. Millere8a04642008-07-17 00:34:19 -0700468 return true;
469 }
470 return false;
David S. Miller6fa98642008-07-08 23:01:06 -0700471}
472
David S. Millere8a04642008-07-17 00:34:19 -0700473/* Is the device using the noop qdisc on all queues? */
David S. Miller05297942008-07-08 23:01:27 -0700474static inline bool qdisc_tx_is_noop(const struct net_device *dev)
475{
David S. Millere8a04642008-07-17 00:34:19 -0700476 unsigned int i;
John Fastabend46e5da42014-09-12 20:04:52 -0700477
David S. Millere8a04642008-07-17 00:34:19 -0700478 for (i = 0; i < dev->num_tx_queues; i++) {
479 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
John Fastabend46e5da42014-09-12 20:04:52 -0700480 if (rcu_access_pointer(txq->qdisc) != &noop_qdisc)
David S. Millere8a04642008-07-17 00:34:19 -0700481 return false;
482 }
483 return true;
David S. Miller05297942008-07-08 23:01:27 -0700484}
485
Eric Dumazetbfe0d022011-01-09 08:30:54 +0000486static inline unsigned int qdisc_pkt_len(const struct sk_buff *skb)
Jussi Kivilinna0abf77e2008-07-20 00:08:27 -0700487{
Jussi Kivilinna175f9c12008-07-20 00:08:47 -0700488 return qdisc_skb_cb(skb)->pkt_len;
Jussi Kivilinna0abf77e2008-07-20 00:08:27 -0700489}
490
Jarek Poplawskic27f3392008-08-04 22:39:11 -0700491/* additional qdisc xmit flags (NET_XMIT_MASK in linux/netdevice.h) */
Jarek Poplawski378a2f02008-08-04 22:31:03 -0700492enum net_xmit_qdisc_t {
493 __NET_XMIT_STOLEN = 0x00010000,
Jarek Poplawskic27f3392008-08-04 22:39:11 -0700494 __NET_XMIT_BYPASS = 0x00020000,
Jarek Poplawski378a2f02008-08-04 22:31:03 -0700495};
496
Jarek Poplawskic27f3392008-08-04 22:39:11 -0700497#ifdef CONFIG_NET_CLS_ACT
Jarek Poplawski378a2f02008-08-04 22:31:03 -0700498#define net_xmit_drop_count(e) ((e) & __NET_XMIT_STOLEN ? 0 : 1)
Jarek Poplawski378a2f02008-08-04 22:31:03 -0700499#else
500#define net_xmit_drop_count(e) (1)
501#endif
502
Eric Dumazeta2da5702011-01-20 03:48:19 +0000503static inline void qdisc_calculate_pkt_len(struct sk_buff *skb,
504 const struct Qdisc *sch)
Jussi Kivilinna5f861732008-07-20 00:08:04 -0700505{
David S. Miller3a682fb2008-07-20 18:13:01 -0700506#ifdef CONFIG_NET_SCHED
Eric Dumazeta2da5702011-01-20 03:48:19 +0000507 struct qdisc_size_table *stab = rcu_dereference_bh(sch->stab);
508
509 if (stab)
510 __qdisc_calculate_pkt_len(skb, stab);
David S. Miller3a682fb2008-07-20 18:13:01 -0700511#endif
Eric Dumazeta2da5702011-01-20 03:48:19 +0000512}
513
Eric Dumazet520ac302016-06-21 23:16:49 -0700514static inline int qdisc_enqueue(struct sk_buff *skb, struct Qdisc *sch,
515 struct sk_buff **to_free)
Eric Dumazeta2da5702011-01-20 03:48:19 +0000516{
517 qdisc_calculate_pkt_len(skb, sch);
Eric Dumazet520ac302016-06-21 23:16:49 -0700518 return sch->enqueue(skb, sch, to_free);
Jussi Kivilinna5f861732008-07-20 00:08:04 -0700519}
520
John Fastabend22e0f8b2014-09-28 11:52:56 -0700521static inline bool qdisc_is_percpu_stats(const struct Qdisc *q)
522{
523 return q->flags & TCQ_F_CPUSTATS;
524}
Eric Dumazetbfe0d022011-01-09 08:30:54 +0000525
Amir Vadai38040702016-05-13 12:55:35 +0000526static inline void _bstats_update(struct gnet_stats_basic_packed *bstats,
527 __u64 bytes, __u32 packets)
528{
529 bstats->bytes += bytes;
530 bstats->packets += packets;
531}
532
Eric Dumazetbfe0d022011-01-09 08:30:54 +0000533static inline void bstats_update(struct gnet_stats_basic_packed *bstats,
534 const struct sk_buff *skb)
Krishna Kumarbbd8a0d2009-08-06 01:44:21 +0000535{
Amir Vadai38040702016-05-13 12:55:35 +0000536 _bstats_update(bstats,
537 qdisc_pkt_len(skb),
538 skb_is_gso(skb) ? skb_shinfo(skb)->gso_segs : 1);
539}
540
541static inline void _bstats_cpu_update(struct gnet_stats_basic_cpu *bstats,
542 __u64 bytes, __u32 packets)
543{
544 u64_stats_update_begin(&bstats->syncp);
545 _bstats_update(&bstats->bstats, bytes, packets);
546 u64_stats_update_end(&bstats->syncp);
Eric Dumazetbfe0d022011-01-09 08:30:54 +0000547}
548
Eric Dumazet24ea5912015-07-06 05:18:03 -0700549static inline void bstats_cpu_update(struct gnet_stats_basic_cpu *bstats,
550 const struct sk_buff *skb)
John Fastabend22e0f8b2014-09-28 11:52:56 -0700551{
John Fastabend22e0f8b2014-09-28 11:52:56 -0700552 u64_stats_update_begin(&bstats->syncp);
553 bstats_update(&bstats->bstats, skb);
554 u64_stats_update_end(&bstats->syncp);
555}
556
Eric Dumazet24ea5912015-07-06 05:18:03 -0700557static inline void qdisc_bstats_cpu_update(struct Qdisc *sch,
558 const struct sk_buff *skb)
559{
560 bstats_cpu_update(this_cpu_ptr(sch->cpu_bstats), skb);
561}
562
Eric Dumazetbfe0d022011-01-09 08:30:54 +0000563static inline void qdisc_bstats_update(struct Qdisc *sch,
564 const struct sk_buff *skb)
565{
566 bstats_update(&sch->bstats, skb);
Krishna Kumarbbd8a0d2009-08-06 01:44:21 +0000567}
568
John Fastabend25331d62014-09-28 11:53:29 -0700569static inline void qdisc_qstats_backlog_dec(struct Qdisc *sch,
570 const struct sk_buff *skb)
571{
572 sch->qstats.backlog -= qdisc_pkt_len(skb);
573}
574
575static inline void qdisc_qstats_backlog_inc(struct Qdisc *sch,
576 const struct sk_buff *skb)
577{
578 sch->qstats.backlog += qdisc_pkt_len(skb);
579}
580
581static inline void __qdisc_qstats_drop(struct Qdisc *sch, int count)
582{
583 sch->qstats.drops += count;
584}
585
Eric Dumazet24ea5912015-07-06 05:18:03 -0700586static inline void qstats_drop_inc(struct gnet_stats_queue *qstats)
John Fastabend25331d62014-09-28 11:53:29 -0700587{
Eric Dumazet24ea5912015-07-06 05:18:03 -0700588 qstats->drops++;
John Fastabend25331d62014-09-28 11:53:29 -0700589}
590
Eric Dumazet24ea5912015-07-06 05:18:03 -0700591static inline void qstats_overlimit_inc(struct gnet_stats_queue *qstats)
John Fastabendb0ab6f92014-09-28 11:54:24 -0700592{
Eric Dumazet24ea5912015-07-06 05:18:03 -0700593 qstats->overlimits++;
594}
John Fastabendb0ab6f92014-09-28 11:54:24 -0700595
Eric Dumazet24ea5912015-07-06 05:18:03 -0700596static inline void qdisc_qstats_drop(struct Qdisc *sch)
597{
598 qstats_drop_inc(&sch->qstats);
599}
600
601static inline void qdisc_qstats_cpu_drop(struct Qdisc *sch)
602{
Eric Dumazeteb60a8d2016-08-24 10:23:34 -0700603 this_cpu_inc(sch->cpu_qstats->drops);
John Fastabendb0ab6f92014-09-28 11:54:24 -0700604}
605
John Fastabend25331d62014-09-28 11:53:29 -0700606static inline void qdisc_qstats_overlimit(struct Qdisc *sch)
607{
608 sch->qstats.overlimits++;
609}
610
Florian Westphal48da34b2016-09-18 00:57:34 +0200611static inline void qdisc_skb_head_init(struct qdisc_skb_head *qh)
Thomas Graf9972b252005-06-18 22:57:26 -0700612{
Florian Westphal48da34b2016-09-18 00:57:34 +0200613 qh->head = NULL;
614 qh->tail = NULL;
615 qh->qlen = 0;
616}
617
618static inline int __qdisc_enqueue_tail(struct sk_buff *skb, struct Qdisc *sch,
619 struct qdisc_skb_head *qh)
620{
621 struct sk_buff *last = qh->tail;
622
623 if (last) {
624 skb->next = NULL;
625 last->next = skb;
626 qh->tail = skb;
627 } else {
628 qh->tail = skb;
629 qh->head = skb;
630 }
631 qh->qlen++;
John Fastabend25331d62014-09-28 11:53:29 -0700632 qdisc_qstats_backlog_inc(sch, skb);
Thomas Graf9972b252005-06-18 22:57:26 -0700633
634 return NET_XMIT_SUCCESS;
635}
636
637static inline int qdisc_enqueue_tail(struct sk_buff *skb, struct Qdisc *sch)
638{
639 return __qdisc_enqueue_tail(skb, sch, &sch->q);
640}
641
Florian Westphal48da34b2016-09-18 00:57:34 +0200642static inline struct sk_buff *__qdisc_dequeue_head(struct qdisc_skb_head *qh)
Thomas Graf9972b252005-06-18 22:57:26 -0700643{
Florian Westphal48da34b2016-09-18 00:57:34 +0200644 struct sk_buff *skb = qh->head;
645
646 if (likely(skb != NULL)) {
647 qh->head = skb->next;
648 qh->qlen--;
649 if (qh->head == NULL)
650 qh->tail = NULL;
651 skb->next = NULL;
652 }
Thomas Graf9972b252005-06-18 22:57:26 -0700653
Florian Westphalec323362016-09-18 00:57:32 +0200654 return skb;
655}
656
657static inline struct sk_buff *qdisc_dequeue_head(struct Qdisc *sch)
658{
659 struct sk_buff *skb = __qdisc_dequeue_head(&sch->q);
660
Eric Dumazet9190b3b2011-01-20 23:31:33 -0800661 if (likely(skb != NULL)) {
John Fastabend25331d62014-09-28 11:53:29 -0700662 qdisc_qstats_backlog_dec(sch, skb);
Eric Dumazet9190b3b2011-01-20 23:31:33 -0800663 qdisc_bstats_update(sch, skb);
664 }
Thomas Graf9972b252005-06-18 22:57:26 -0700665
666 return skb;
667}
668
Eric Dumazet520ac302016-06-21 23:16:49 -0700669/* Instead of calling kfree_skb() while root qdisc lock is held,
670 * queue the skb for future freeing at end of __dev_xmit_skb()
671 */
672static inline void __qdisc_drop(struct sk_buff *skb, struct sk_buff **to_free)
673{
674 skb->next = *to_free;
675 *to_free = skb;
676}
677
Hagen Paul Pfeifer57dbb2d2010-01-24 12:30:59 +0000678static inline unsigned int __qdisc_queue_drop_head(struct Qdisc *sch,
Florian Westphal48da34b2016-09-18 00:57:34 +0200679 struct qdisc_skb_head *qh,
Eric Dumazet520ac302016-06-21 23:16:49 -0700680 struct sk_buff **to_free)
Hagen Paul Pfeifer57dbb2d2010-01-24 12:30:59 +0000681{
Florian Westphal48da34b2016-09-18 00:57:34 +0200682 struct sk_buff *skb = __qdisc_dequeue_head(qh);
Hagen Paul Pfeifer57dbb2d2010-01-24 12:30:59 +0000683
684 if (likely(skb != NULL)) {
685 unsigned int len = qdisc_pkt_len(skb);
Eric Dumazet520ac302016-06-21 23:16:49 -0700686
John Fastabend25331d62014-09-28 11:53:29 -0700687 qdisc_qstats_backlog_dec(sch, skb);
Eric Dumazet520ac302016-06-21 23:16:49 -0700688 __qdisc_drop(skb, to_free);
Hagen Paul Pfeifer57dbb2d2010-01-24 12:30:59 +0000689 return len;
690 }
691
692 return 0;
693}
694
Eric Dumazet520ac302016-06-21 23:16:49 -0700695static inline unsigned int qdisc_queue_drop_head(struct Qdisc *sch,
696 struct sk_buff **to_free)
Hagen Paul Pfeifer57dbb2d2010-01-24 12:30:59 +0000697{
Eric Dumazet520ac302016-06-21 23:16:49 -0700698 return __qdisc_queue_drop_head(sch, &sch->q, to_free);
Hagen Paul Pfeifer57dbb2d2010-01-24 12:30:59 +0000699}
700
Patrick McHardy48a8f512008-10-31 00:44:18 -0700701static inline struct sk_buff *qdisc_peek_head(struct Qdisc *sch)
702{
Florian Westphal48da34b2016-09-18 00:57:34 +0200703 const struct qdisc_skb_head *qh = &sch->q;
704
705 return qh->head;
Patrick McHardy48a8f512008-10-31 00:44:18 -0700706}
707
Jarek Poplawski77be1552008-10-31 00:47:01 -0700708/* generic pseudo peek method for non-work-conserving qdisc */
709static inline struct sk_buff *qdisc_peek_dequeued(struct Qdisc *sch)
710{
711 /* we can reuse ->gso_skb because peek isn't called for root qdiscs */
Jarek Poplawski61c9eaf2008-11-05 16:02:34 -0800712 if (!sch->gso_skb) {
Jarek Poplawski77be1552008-10-31 00:47:01 -0700713 sch->gso_skb = sch->dequeue(sch);
WANG Conga27758f2016-06-03 15:05:57 -0700714 if (sch->gso_skb) {
Jarek Poplawski61c9eaf2008-11-05 16:02:34 -0800715 /* it's still part of the queue */
WANG Conga27758f2016-06-03 15:05:57 -0700716 qdisc_qstats_backlog_inc(sch, sch->gso_skb);
Jarek Poplawski61c9eaf2008-11-05 16:02:34 -0800717 sch->q.qlen++;
WANG Conga27758f2016-06-03 15:05:57 -0700718 }
Jarek Poplawski61c9eaf2008-11-05 16:02:34 -0800719 }
Jarek Poplawski77be1552008-10-31 00:47:01 -0700720
721 return sch->gso_skb;
722}
723
724/* use instead of qdisc->dequeue() for all qdiscs queried with ->peek() */
725static inline struct sk_buff *qdisc_dequeue_peeked(struct Qdisc *sch)
726{
727 struct sk_buff *skb = sch->gso_skb;
728
Jarek Poplawski61c9eaf2008-11-05 16:02:34 -0800729 if (skb) {
Jarek Poplawski77be1552008-10-31 00:47:01 -0700730 sch->gso_skb = NULL;
WANG Conga27758f2016-06-03 15:05:57 -0700731 qdisc_qstats_backlog_dec(sch, skb);
Jarek Poplawski61c9eaf2008-11-05 16:02:34 -0800732 sch->q.qlen--;
733 } else {
Jarek Poplawski77be1552008-10-31 00:47:01 -0700734 skb = sch->dequeue(sch);
Jarek Poplawski61c9eaf2008-11-05 16:02:34 -0800735 }
Jarek Poplawski77be1552008-10-31 00:47:01 -0700736
737 return skb;
738}
739
Florian Westphal48da34b2016-09-18 00:57:34 +0200740static inline void __qdisc_reset_queue(struct qdisc_skb_head *qh)
Thomas Graf9972b252005-06-18 22:57:26 -0700741{
742 /*
743 * We do not know the backlog in bytes of this list, it
744 * is up to the caller to correct it
745 */
Florian Westphal48da34b2016-09-18 00:57:34 +0200746 ASSERT_RTNL();
747 if (qh->qlen) {
748 rtnl_kfree_skbs(qh->head, qh->tail);
749
750 qh->head = NULL;
751 qh->tail = NULL;
752 qh->qlen = 0;
Eric Dumazet1b5c5492016-06-13 20:21:50 -0700753 }
Thomas Graf9972b252005-06-18 22:57:26 -0700754}
755
756static inline void qdisc_reset_queue(struct Qdisc *sch)
757{
Eric Dumazet1b5c5492016-06-13 20:21:50 -0700758 __qdisc_reset_queue(&sch->q);
Thomas Graf9972b252005-06-18 22:57:26 -0700759 sch->qstats.backlog = 0;
760}
761
WANG Cong86a79962016-02-25 14:55:00 -0800762static inline struct Qdisc *qdisc_replace(struct Qdisc *sch, struct Qdisc *new,
763 struct Qdisc **pold)
764{
765 struct Qdisc *old;
766
767 sch_tree_lock(sch);
768 old = *pold;
769 *pold = new;
770 if (old != NULL) {
WANG Cong2ccccf52016-02-25 14:55:01 -0800771 qdisc_tree_reduce_backlog(old, old->q.qlen, old->qstats.backlog);
WANG Cong86a79962016-02-25 14:55:00 -0800772 qdisc_reset(old);
773 }
774 sch_tree_unlock(sch);
775
776 return old;
777}
778
Eric Dumazet1b5c5492016-06-13 20:21:50 -0700779static inline void rtnl_qdisc_drop(struct sk_buff *skb, struct Qdisc *sch)
780{
781 rtnl_kfree_skbs(skb, skb);
782 qdisc_qstats_drop(sch);
783}
784
Eric Dumazet520ac302016-06-21 23:16:49 -0700785
786static inline int qdisc_drop(struct sk_buff *skb, struct Qdisc *sch,
787 struct sk_buff **to_free)
Thomas Graf9972b252005-06-18 22:57:26 -0700788{
Eric Dumazet520ac302016-06-21 23:16:49 -0700789 __qdisc_drop(skb, to_free);
John Fastabend25331d62014-09-28 11:53:29 -0700790 qdisc_qstats_drop(sch);
Thomas Graf9972b252005-06-18 22:57:26 -0700791
792 return NET_XMIT_DROP;
793}
794
Jesper Dangaard Brouere9bef552007-09-12 16:35:24 +0200795/* Length to Time (L2T) lookup in a qdisc_rate_table, to determine how
796 long it will take to send a packet given its size.
797 */
798static inline u32 qdisc_l2t(struct qdisc_rate_table* rtab, unsigned int pktlen)
799{
Jesper Dangaard Brouere08b0992007-09-12 16:36:28 +0200800 int slot = pktlen + rtab->rate.cell_align + rtab->rate.overhead;
801 if (slot < 0)
802 slot = 0;
Jesper Dangaard Brouere9bef552007-09-12 16:35:24 +0200803 slot >>= rtab->rate.cell_log;
804 if (slot > 255)
Eric Dumazeta02cec22010-09-22 20:43:57 +0000805 return rtab->data[255]*(slot >> 8) + rtab->data[slot & 0xFF];
Jesper Dangaard Brouere9bef552007-09-12 16:35:24 +0200806 return rtab->data[slot];
807}
808
Jiri Pirko292f1c72013-02-12 00:12:03 +0000809struct psched_ratecfg {
Eric Dumazet130d3d62013-06-06 13:56:19 -0700810 u64 rate_bytes_ps; /* bytes per second */
Eric Dumazet01cb71d2013-06-02 13:55:05 +0000811 u32 mult;
812 u16 overhead;
Jesper Dangaard Brouer8a8e3d82013-08-14 23:47:11 +0200813 u8 linklayer;
Eric Dumazet01cb71d2013-06-02 13:55:05 +0000814 u8 shift;
Jiri Pirko292f1c72013-02-12 00:12:03 +0000815};
816
817static inline u64 psched_l2t_ns(const struct psched_ratecfg *r,
818 unsigned int len)
819{
Jesper Dangaard Brouer8a8e3d82013-08-14 23:47:11 +0200820 len += r->overhead;
821
822 if (unlikely(r->linklayer == TC_LINKLAYER_ATM))
823 return ((u64)(DIV_ROUND_UP(len,48)*53) * r->mult) >> r->shift;
824
825 return ((u64)len * r->mult) >> r->shift;
Jiri Pirko292f1c72013-02-12 00:12:03 +0000826}
827
Joe Perches5c152572013-07-30 22:47:13 -0700828void psched_ratecfg_precompute(struct psched_ratecfg *r,
Eric Dumazet3e1e3aa2013-09-19 09:10:03 -0700829 const struct tc_ratespec *conf,
830 u64 rate64);
Jiri Pirko292f1c72013-02-12 00:12:03 +0000831
Eric Dumazet01cb71d2013-06-02 13:55:05 +0000832static inline void psched_ratecfg_getrate(struct tc_ratespec *res,
833 const struct psched_ratecfg *r)
Jiri Pirko292f1c72013-02-12 00:12:03 +0000834{
Eric Dumazet01cb71d2013-06-02 13:55:05 +0000835 memset(res, 0, sizeof(*res));
Eric Dumazet3e1e3aa2013-09-19 09:10:03 -0700836
837 /* legacy struct tc_ratespec has a 32bit @rate field
838 * Qdisc using 64bit rate should add new attributes
839 * in order to maintain compatibility.
840 */
841 res->rate = min_t(u64, r->rate_bytes_ps, ~0U);
842
Eric Dumazet01cb71d2013-06-02 13:55:05 +0000843 res->overhead = r->overhead;
Jesper Dangaard Brouer8a8e3d82013-08-14 23:47:11 +0200844 res->linklayer = (r->linklayer & TC_LINKLAYER_MASK);
Jiri Pirko292f1c72013-02-12 00:12:03 +0000845}
846
Linus Torvalds1da177e2005-04-16 15:20:36 -0700847#endif