1 #ifndef __NET_SCHED_GENERIC_H 2 #define __NET_SCHED_GENERIC_H 3 4 #include <linux/netdevice.h> 5 #include <linux/types.h> 6 #include <linux/rcupdate.h> 7 #include <linux/pkt_sched.h> 8 #include <linux/pkt_cls.h> 9 #include <net/gen_stats.h> 10 #include <net/rtnetlink.h> 11 12 struct Qdisc_ops; 13 struct qdisc_walker; 14 struct tcf_walker; 15 struct module; 16 17 struct qdisc_rate_table { 18 struct tc_ratespec rate; 19 u32 data[256]; 20 struct qdisc_rate_table *next; 21 int refcnt; 22 }; 23 24 enum qdisc_state_t { 25 __QDISC_STATE_SCHED, 26 __QDISC_STATE_DEACTIVATED, 27 __QDISC_STATE_THROTTLED, 28 }; 29 30 /* 31 * following bits are only changed while qdisc lock is held 32 */ 33 enum qdisc___state_t { 34 __QDISC___STATE_RUNNING = 1, 35 }; 36 37 struct qdisc_size_table { 38 struct rcu_head rcu; 39 struct list_head list; 40 struct tc_sizespec szopts; 41 int refcnt; 42 u16 data[]; 43 }; 44 45 struct Qdisc { 46 int (*enqueue)(struct sk_buff *skb, struct Qdisc *dev); 47 struct sk_buff * (*dequeue)(struct Qdisc *dev); 48 unsigned int flags; 49 #define TCQ_F_BUILTIN 1 50 #define TCQ_F_INGRESS 2 51 #define TCQ_F_CAN_BYPASS 4 52 #define TCQ_F_MQROOT 8 53 #define TCQ_F_ONETXQUEUE 0x10 /* dequeue_skb() can assume all skbs are for 54 * q->dev_queue : It can test 55 * netif_xmit_frozen_or_stopped() before 56 * dequeueing next packet. 57 * Its true for MQ/MQPRIO slaves, or non 58 * multiqueue device. 59 */ 60 #define TCQ_F_WARN_NONWC (1 << 16) 61 u32 limit; 62 const struct Qdisc_ops *ops; 63 struct qdisc_size_table __rcu *stab; 64 struct list_head list; 65 u32 handle; 66 u32 parent; 67 int (*reshape_fail)(struct sk_buff *skb, 68 struct Qdisc *q); 69 70 void *u32_node; 71 72 /* This field is deprecated, but it is still used by CBQ 73 * and it will live until better solution will be invented. 74 */ 75 struct Qdisc *__parent; 76 struct netdev_queue *dev_queue; 77 78 struct gnet_stats_rate_est64 rate_est; 79 struct Qdisc *next_sched; 80 struct sk_buff *gso_skb; 81 /* 82 * For performance sake on SMP, we put highly modified fields at the end 83 */ 84 unsigned long state; 85 struct sk_buff_head q; 86 struct gnet_stats_basic_packed bstats; 87 unsigned int __state; 88 struct gnet_stats_queue qstats; 89 struct rcu_head rcu_head; 90 int padded; 91 atomic_t refcnt; 92 93 spinlock_t busylock ____cacheline_aligned_in_smp; 94 }; 95 96 static inline bool qdisc_is_running(const struct Qdisc *qdisc) 97 { 98 return (qdisc->__state & __QDISC___STATE_RUNNING) ? true : false; 99 } 100 101 static inline bool qdisc_run_begin(struct Qdisc *qdisc) 102 { 103 if (qdisc_is_running(qdisc)) 104 return false; 105 qdisc->__state |= __QDISC___STATE_RUNNING; 106 return true; 107 } 108 109 static inline void qdisc_run_end(struct Qdisc *qdisc) 110 { 111 qdisc->__state &= ~__QDISC___STATE_RUNNING; 112 } 113 114 static inline bool qdisc_is_throttled(const struct Qdisc *qdisc) 115 { 116 return test_bit(__QDISC_STATE_THROTTLED, &qdisc->state) ? true : false; 117 } 118 119 static inline void qdisc_throttled(struct Qdisc *qdisc) 120 { 121 set_bit(__QDISC_STATE_THROTTLED, &qdisc->state); 122 } 123 124 static inline void qdisc_unthrottled(struct Qdisc *qdisc) 125 { 126 clear_bit(__QDISC_STATE_THROTTLED, &qdisc->state); 127 } 128 129 struct Qdisc_class_ops { 130 /* Child qdisc manipulation */ 131 struct netdev_queue * (*select_queue)(struct Qdisc *, struct tcmsg *); 132 int (*graft)(struct Qdisc *, unsigned long cl, 133 struct Qdisc *, struct Qdisc **); 134 struct Qdisc * (*leaf)(struct Qdisc *, unsigned long cl); 135 void (*qlen_notify)(struct Qdisc *, unsigned long); 136 137 /* Class manipulation routines */ 138 unsigned long (*get)(struct Qdisc *, u32 classid); 139 void (*put)(struct Qdisc *, unsigned long); 140 int (*change)(struct Qdisc *, u32, u32, 141 struct nlattr **, unsigned long *); 142 int (*delete)(struct Qdisc *, unsigned long); 143 void (*walk)(struct Qdisc *, struct qdisc_walker * arg); 144 145 /* Filter manipulation */ 146 struct tcf_proto ** (*tcf_chain)(struct Qdisc *, unsigned long); 147 unsigned long (*bind_tcf)(struct Qdisc *, unsigned long, 148 u32 classid); 149 void (*unbind_tcf)(struct Qdisc *, unsigned long); 150 151 /* rtnetlink specific */ 152 int (*dump)(struct Qdisc *, unsigned long, 153 struct sk_buff *skb, struct tcmsg*); 154 int (*dump_stats)(struct Qdisc *, unsigned long, 155 struct gnet_dump *); 156 }; 157 158 struct Qdisc_ops { 159 struct Qdisc_ops *next; 160 const struct Qdisc_class_ops *cl_ops; 161 char id[IFNAMSIZ]; 162 int priv_size; 163 164 int (*enqueue)(struct sk_buff *, struct Qdisc *); 165 struct sk_buff * (*dequeue)(struct Qdisc *); 166 struct sk_buff * (*peek)(struct Qdisc *); 167 unsigned int (*drop)(struct Qdisc *); 168 169 int (*init)(struct Qdisc *, struct nlattr *arg); 170 void (*reset)(struct Qdisc *); 171 void (*destroy)(struct Qdisc *); 172 int (*change)(struct Qdisc *, struct nlattr *arg); 173 void (*attach)(struct Qdisc *); 174 175 int (*dump)(struct Qdisc *, struct sk_buff *); 176 int (*dump_stats)(struct Qdisc *, struct gnet_dump *); 177 178 struct module *owner; 179 }; 180 181 182 struct tcf_result { 183 unsigned long class; 184 u32 classid; 185 }; 186 187 struct tcf_proto_ops { 188 struct tcf_proto_ops *next; 189 char kind[IFNAMSIZ]; 190 191 int (*classify)(struct sk_buff *, 192 const struct tcf_proto *, 193 struct tcf_result *); 194 int (*init)(struct tcf_proto*); 195 void (*destroy)(struct tcf_proto*); 196 197 unsigned long (*get)(struct tcf_proto*, u32 handle); 198 void (*put)(struct tcf_proto*, unsigned long); 199 int (*change)(struct net *net, struct sk_buff *, 200 struct tcf_proto*, unsigned long, 201 u32 handle, struct nlattr **, 202 unsigned long *); 203 int (*delete)(struct tcf_proto*, unsigned long); 204 void (*walk)(struct tcf_proto*, struct tcf_walker *arg); 205 206 /* rtnetlink specific */ 207 int (*dump)(struct tcf_proto*, unsigned long, 208 struct sk_buff *skb, struct tcmsg*); 209 210 struct module *owner; 211 }; 212 213 struct tcf_proto { 214 /* Fast access part */ 215 struct tcf_proto *next; 216 void *root; 217 int (*classify)(struct sk_buff *, 218 const struct tcf_proto *, 219 struct tcf_result *); 220 __be16 protocol; 221 222 /* All the rest */ 223 u32 prio; 224 u32 classid; 225 struct Qdisc *q; 226 void *data; 227 const struct tcf_proto_ops *ops; 228 }; 229 230 struct qdisc_skb_cb { 231 unsigned int pkt_len; 232 u16 slave_dev_queue_mapping; 233 u16 _pad; 234 unsigned char data[20]; 235 }; 236 237 static inline void qdisc_cb_private_validate(const struct sk_buff *skb, int sz) 238 { 239 struct qdisc_skb_cb *qcb; 240 241 BUILD_BUG_ON(sizeof(skb->cb) < offsetof(struct qdisc_skb_cb, data) + sz); 242 BUILD_BUG_ON(sizeof(qcb->data) < sz); 243 } 244 245 static inline int qdisc_qlen(const struct Qdisc *q) 246 { 247 return q->q.qlen; 248 } 249 250 static inline struct qdisc_skb_cb *qdisc_skb_cb(const struct sk_buff *skb) 251 { 252 return (struct qdisc_skb_cb *)skb->cb; 253 } 254 255 static inline spinlock_t *qdisc_lock(struct Qdisc *qdisc) 256 { 257 return &qdisc->q.lock; 258 } 259 260 static inline struct Qdisc *qdisc_root(const struct Qdisc *qdisc) 261 { 262 return qdisc->dev_queue->qdisc; 263 } 264 265 static inline struct Qdisc *qdisc_root_sleeping(const struct Qdisc *qdisc) 266 { 267 return qdisc->dev_queue->qdisc_sleeping; 268 } 269 270 /* The qdisc root lock is a mechanism by which to top level 271 * of a qdisc tree can be locked from any qdisc node in the 272 * forest. This allows changing the configuration of some 273 * aspect of the qdisc tree while blocking out asynchronous 274 * qdisc access in the packet processing paths. 275 * 276 * It is only legal to do this when the root will not change 277 * on us. Otherwise we'll potentially lock the wrong qdisc 278 * root. This is enforced by holding the RTNL semaphore, which 279 * all users of this lock accessor must do. 280 */ 281 static inline spinlock_t *qdisc_root_lock(const struct Qdisc *qdisc) 282 { 283 struct Qdisc *root = qdisc_root(qdisc); 284 285 ASSERT_RTNL(); 286 return qdisc_lock(root); 287 } 288 289 static inline spinlock_t *qdisc_root_sleeping_lock(const struct Qdisc *qdisc) 290 { 291 struct Qdisc *root = qdisc_root_sleeping(qdisc); 292 293 ASSERT_RTNL(); 294 return qdisc_lock(root); 295 } 296 297 static inline struct net_device *qdisc_dev(const struct Qdisc *qdisc) 298 { 299 return qdisc->dev_queue->dev; 300 } 301 302 static inline void sch_tree_lock(const struct Qdisc *q) 303 { 304 spin_lock_bh(qdisc_root_sleeping_lock(q)); 305 } 306 307 static inline void sch_tree_unlock(const struct Qdisc *q) 308 { 309 spin_unlock_bh(qdisc_root_sleeping_lock(q)); 310 } 311 312 #define tcf_tree_lock(tp) sch_tree_lock((tp)->q) 313 #define tcf_tree_unlock(tp) sch_tree_unlock((tp)->q) 314 315 extern struct Qdisc noop_qdisc; 316 extern struct Qdisc_ops noop_qdisc_ops; 317 extern struct Qdisc_ops pfifo_fast_ops; 318 extern struct Qdisc_ops mq_qdisc_ops; 319 extern const struct Qdisc_ops *default_qdisc_ops; 320 321 struct Qdisc_class_common { 322 u32 classid; 323 struct hlist_node hnode; 324 }; 325 326 struct Qdisc_class_hash { 327 struct hlist_head *hash; 328 unsigned int hashsize; 329 unsigned int hashmask; 330 unsigned int hashelems; 331 }; 332 333 static inline unsigned int qdisc_class_hash(u32 id, u32 mask) 334 { 335 id ^= id >> 8; 336 id ^= id >> 4; 337 return id & mask; 338 } 339 340 static inline struct Qdisc_class_common * 341 qdisc_class_find(const struct Qdisc_class_hash *hash, u32 id) 342 { 343 struct Qdisc_class_common *cl; 344 unsigned int h; 345 346 h = qdisc_class_hash(id, hash->hashmask); 347 hlist_for_each_entry(cl, &hash->hash[h], hnode) { 348 if (cl->classid == id) 349 return cl; 350 } 351 return NULL; 352 } 353 354 int qdisc_class_hash_init(struct Qdisc_class_hash *); 355 void qdisc_class_hash_insert(struct Qdisc_class_hash *, 356 struct Qdisc_class_common *); 357 void qdisc_class_hash_remove(struct Qdisc_class_hash *, 358 struct Qdisc_class_common *); 359 void qdisc_class_hash_grow(struct Qdisc *, struct Qdisc_class_hash *); 360 void qdisc_class_hash_destroy(struct Qdisc_class_hash *); 361 362 void dev_init_scheduler(struct net_device *dev); 363 void dev_shutdown(struct net_device *dev); 364 void dev_activate(struct net_device *dev); 365 void dev_deactivate(struct net_device *dev); 366 void dev_deactivate_many(struct list_head *head); 367 struct Qdisc *dev_graft_qdisc(struct netdev_queue *dev_queue, 368 struct Qdisc *qdisc); 369 void qdisc_reset(struct Qdisc *qdisc); 370 void qdisc_destroy(struct Qdisc *qdisc); 371 void qdisc_tree_decrease_qlen(struct Qdisc *qdisc, unsigned int n); 372 struct Qdisc *qdisc_alloc(struct netdev_queue *dev_queue, 373 const struct Qdisc_ops *ops); 374 struct Qdisc *qdisc_create_dflt(struct netdev_queue *dev_queue, 375 const struct Qdisc_ops *ops, u32 parentid); 376 void __qdisc_calculate_pkt_len(struct sk_buff *skb, 377 const struct qdisc_size_table *stab); 378 void tcf_destroy(struct tcf_proto *tp); 379 void tcf_destroy_chain(struct tcf_proto **fl); 380 381 /* Reset all TX qdiscs greater then index of a device. */ 382 static inline void qdisc_reset_all_tx_gt(struct net_device *dev, unsigned int i) 383 { 384 struct Qdisc *qdisc; 385 386 for (; i < dev->num_tx_queues; i++) { 387 qdisc = netdev_get_tx_queue(dev, i)->qdisc; 388 if (qdisc) { 389 spin_lock_bh(qdisc_lock(qdisc)); 390 qdisc_reset(qdisc); 391 spin_unlock_bh(qdisc_lock(qdisc)); 392 } 393 } 394 } 395 396 static inline void qdisc_reset_all_tx(struct net_device *dev) 397 { 398 qdisc_reset_all_tx_gt(dev, 0); 399 } 400 401 /* Are all TX queues of the device empty? */ 402 static inline bool qdisc_all_tx_empty(const struct net_device *dev) 403 { 404 unsigned int i; 405 for (i = 0; i < dev->num_tx_queues; i++) { 406 struct netdev_queue *txq = netdev_get_tx_queue(dev, i); 407 const struct Qdisc *q = txq->qdisc; 408 409 if (q->q.qlen) 410 return false; 411 } 412 return true; 413 } 414 415 /* Are any of the TX qdiscs changing? */ 416 static inline bool qdisc_tx_changing(const struct net_device *dev) 417 { 418 unsigned int i; 419 for (i = 0; i < dev->num_tx_queues; i++) { 420 struct netdev_queue *txq = netdev_get_tx_queue(dev, i); 421 if (txq->qdisc != txq->qdisc_sleeping) 422 return true; 423 } 424 return false; 425 } 426 427 /* Is the device using the noop qdisc on all queues? */ 428 static inline bool qdisc_tx_is_noop(const struct net_device *dev) 429 { 430 unsigned int i; 431 for (i = 0; i < dev->num_tx_queues; i++) { 432 struct netdev_queue *txq = netdev_get_tx_queue(dev, i); 433 if (txq->qdisc != &noop_qdisc) 434 return false; 435 } 436 return true; 437 } 438 439 static inline unsigned int qdisc_pkt_len(const struct sk_buff *skb) 440 { 441 return qdisc_skb_cb(skb)->pkt_len; 442 } 443 444 /* additional qdisc xmit flags (NET_XMIT_MASK in linux/netdevice.h) */ 445 enum net_xmit_qdisc_t { 446 __NET_XMIT_STOLEN = 0x00010000, 447 __NET_XMIT_BYPASS = 0x00020000, 448 }; 449 450 #ifdef CONFIG_NET_CLS_ACT 451 #define net_xmit_drop_count(e) ((e) & __NET_XMIT_STOLEN ? 0 : 1) 452 #else 453 #define net_xmit_drop_count(e) (1) 454 #endif 455 456 static inline void qdisc_calculate_pkt_len(struct sk_buff *skb, 457 const struct Qdisc *sch) 458 { 459 #ifdef CONFIG_NET_SCHED 460 struct qdisc_size_table *stab = rcu_dereference_bh(sch->stab); 461 462 if (stab) 463 __qdisc_calculate_pkt_len(skb, stab); 464 #endif 465 } 466 467 static inline int qdisc_enqueue(struct sk_buff *skb, struct Qdisc *sch) 468 { 469 qdisc_calculate_pkt_len(skb, sch); 470 return sch->enqueue(skb, sch); 471 } 472 473 static inline int qdisc_enqueue_root(struct sk_buff *skb, struct Qdisc *sch) 474 { 475 qdisc_skb_cb(skb)->pkt_len = skb->len; 476 return qdisc_enqueue(skb, sch) & NET_XMIT_MASK; 477 } 478 479 480 static inline void bstats_update(struct gnet_stats_basic_packed *bstats, 481 const struct sk_buff *skb) 482 { 483 bstats->bytes += qdisc_pkt_len(skb); 484 bstats->packets += skb_is_gso(skb) ? skb_shinfo(skb)->gso_segs : 1; 485 } 486 487 static inline void qdisc_bstats_update(struct Qdisc *sch, 488 const struct sk_buff *skb) 489 { 490 bstats_update(&sch->bstats, skb); 491 } 492 493 static inline int __qdisc_enqueue_tail(struct sk_buff *skb, struct Qdisc *sch, 494 struct sk_buff_head *list) 495 { 496 __skb_queue_tail(list, skb); 497 sch->qstats.backlog += qdisc_pkt_len(skb); 498 499 return NET_XMIT_SUCCESS; 500 } 501 502 static inline int qdisc_enqueue_tail(struct sk_buff *skb, struct Qdisc *sch) 503 { 504 return __qdisc_enqueue_tail(skb, sch, &sch->q); 505 } 506 507 static inline struct sk_buff *__qdisc_dequeue_head(struct Qdisc *sch, 508 struct sk_buff_head *list) 509 { 510 struct sk_buff *skb = __skb_dequeue(list); 511 512 if (likely(skb != NULL)) { 513 sch->qstats.backlog -= qdisc_pkt_len(skb); 514 qdisc_bstats_update(sch, skb); 515 } 516 517 return skb; 518 } 519 520 static inline struct sk_buff *qdisc_dequeue_head(struct Qdisc *sch) 521 { 522 return __qdisc_dequeue_head(sch, &sch->q); 523 } 524 525 static inline unsigned int __qdisc_queue_drop_head(struct Qdisc *sch, 526 struct sk_buff_head *list) 527 { 528 struct sk_buff *skb = __skb_dequeue(list); 529 530 if (likely(skb != NULL)) { 531 unsigned int len = qdisc_pkt_len(skb); 532 sch->qstats.backlog -= len; 533 kfree_skb(skb); 534 return len; 535 } 536 537 return 0; 538 } 539 540 static inline unsigned int qdisc_queue_drop_head(struct Qdisc *sch) 541 { 542 return __qdisc_queue_drop_head(sch, &sch->q); 543 } 544 545 static inline struct sk_buff *__qdisc_dequeue_tail(struct Qdisc *sch, 546 struct sk_buff_head *list) 547 { 548 struct sk_buff *skb = __skb_dequeue_tail(list); 549 550 if (likely(skb != NULL)) 551 sch->qstats.backlog -= qdisc_pkt_len(skb); 552 553 return skb; 554 } 555 556 static inline struct sk_buff *qdisc_dequeue_tail(struct Qdisc *sch) 557 { 558 return __qdisc_dequeue_tail(sch, &sch->q); 559 } 560 561 static inline struct sk_buff *qdisc_peek_head(struct Qdisc *sch) 562 { 563 return skb_peek(&sch->q); 564 } 565 566 /* generic pseudo peek method for non-work-conserving qdisc */ 567 static inline struct sk_buff *qdisc_peek_dequeued(struct Qdisc *sch) 568 { 569 /* we can reuse ->gso_skb because peek isn't called for root qdiscs */ 570 if (!sch->gso_skb) { 571 sch->gso_skb = sch->dequeue(sch); 572 if (sch->gso_skb) 573 /* it's still part of the queue */ 574 sch->q.qlen++; 575 } 576 577 return sch->gso_skb; 578 } 579 580 /* use instead of qdisc->dequeue() for all qdiscs queried with ->peek() */ 581 static inline struct sk_buff *qdisc_dequeue_peeked(struct Qdisc *sch) 582 { 583 struct sk_buff *skb = sch->gso_skb; 584 585 if (skb) { 586 sch->gso_skb = NULL; 587 sch->q.qlen--; 588 } else { 589 skb = sch->dequeue(sch); 590 } 591 592 return skb; 593 } 594 595 static inline void __qdisc_reset_queue(struct Qdisc *sch, 596 struct sk_buff_head *list) 597 { 598 /* 599 * We do not know the backlog in bytes of this list, it 600 * is up to the caller to correct it 601 */ 602 __skb_queue_purge(list); 603 } 604 605 static inline void qdisc_reset_queue(struct Qdisc *sch) 606 { 607 __qdisc_reset_queue(sch, &sch->q); 608 sch->qstats.backlog = 0; 609 } 610 611 static inline unsigned int __qdisc_queue_drop(struct Qdisc *sch, 612 struct sk_buff_head *list) 613 { 614 struct sk_buff *skb = __qdisc_dequeue_tail(sch, list); 615 616 if (likely(skb != NULL)) { 617 unsigned int len = qdisc_pkt_len(skb); 618 kfree_skb(skb); 619 return len; 620 } 621 622 return 0; 623 } 624 625 static inline unsigned int qdisc_queue_drop(struct Qdisc *sch) 626 { 627 return __qdisc_queue_drop(sch, &sch->q); 628 } 629 630 static inline int qdisc_drop(struct sk_buff *skb, struct Qdisc *sch) 631 { 632 kfree_skb(skb); 633 sch->qstats.drops++; 634 635 return NET_XMIT_DROP; 636 } 637 638 static inline int qdisc_reshape_fail(struct sk_buff *skb, struct Qdisc *sch) 639 { 640 sch->qstats.drops++; 641 642 #ifdef CONFIG_NET_CLS_ACT 643 if (sch->reshape_fail == NULL || sch->reshape_fail(skb, sch)) 644 goto drop; 645 646 return NET_XMIT_SUCCESS; 647 648 drop: 649 #endif 650 kfree_skb(skb); 651 return NET_XMIT_DROP; 652 } 653 654 /* Length to Time (L2T) lookup in a qdisc_rate_table, to determine how 655 long it will take to send a packet given its size. 656 */ 657 static inline u32 qdisc_l2t(struct qdisc_rate_table* rtab, unsigned int pktlen) 658 { 659 int slot = pktlen + rtab->rate.cell_align + rtab->rate.overhead; 660 if (slot < 0) 661 slot = 0; 662 slot >>= rtab->rate.cell_log; 663 if (slot > 255) 664 return rtab->data[255]*(slot >> 8) + rtab->data[slot & 0xFF]; 665 return rtab->data[slot]; 666 } 667 668 #ifdef CONFIG_NET_CLS_ACT 669 static inline struct sk_buff *skb_act_clone(struct sk_buff *skb, gfp_t gfp_mask, 670 int action) 671 { 672 struct sk_buff *n; 673 674 n = skb_clone(skb, gfp_mask); 675 676 if (n) { 677 n->tc_verd = SET_TC_VERD(n->tc_verd, 0); 678 n->tc_verd = CLR_TC_OK2MUNGE(n->tc_verd); 679 n->tc_verd = CLR_TC_MUNGED(n->tc_verd); 680 } 681 return n; 682 } 683 #endif 684 685 struct psched_ratecfg { 686 u64 rate_bytes_ps; /* bytes per second */ 687 u32 mult; 688 u16 overhead; 689 u8 linklayer; 690 u8 shift; 691 }; 692 693 static inline u64 psched_l2t_ns(const struct psched_ratecfg *r, 694 unsigned int len) 695 { 696 len += r->overhead; 697 698 if (unlikely(r->linklayer == TC_LINKLAYER_ATM)) 699 return ((u64)(DIV_ROUND_UP(len,48)*53) * r->mult) >> r->shift; 700 701 return ((u64)len * r->mult) >> r->shift; 702 } 703 704 void psched_ratecfg_precompute(struct psched_ratecfg *r, 705 const struct tc_ratespec *conf); 706 707 static inline void psched_ratecfg_getrate(struct tc_ratespec *res, 708 const struct psched_ratecfg *r) 709 { 710 memset(res, 0, sizeof(*res)); 711 res->rate = r->rate_bytes_ps; 712 res->overhead = r->overhead; 713 res->linklayer = (r->linklayer & TC_LINKLAYER_MASK); 714 } 715 716 #endif 717