obsolete-buildroot/sources/openwrt/kernel/patches/110-sch_htb.patch

   1 --- src/linux/linux/net/sched/sch_htb.c 2003-10-14 01:09:35.000000000 -0700
   2 +++ src/linux/linux.2.4.26/net/sched/sch_htb.c  2004-05-10 00:05:51.000000000 -0700
   3 @@ -9,6 +9,8 @@
   4   * Authors:    Martin Devera, <devik@cdi.cz>
   5   *
   6   * Credits (in time order) for older HTB versions:
   7 + *              Stef Coene <stef.coene@docum.org>
   8 + *                     HTB support at LARTC mailing list
   9   *             Ondrej Kraus, <krauso@barr.cz>
  10   *                     found missing INIT_QDISC(htb)
  11   *             Vladimir Smelhaus, Aamer Akhter, Bert Hubert
  12 @@ -17,9 +19,13 @@
  13   *                     code review and helpful comments on shaping
  14   *             Tomasz Wrona, <tw@eter.tym.pl>
  15   *                     created test case so that I was able to fix nasty bug
  16 + *             Wilfried Weissmann
  17 + *                     spotted bug in dequeue code and helped with fix
  18 + *             Jiri Fojtasek
  19 + *                     fixed requeue routine
  20   *             and many others. thanks.
  21   *
  22 - * $Id: sch_htb.c,v 1.1.1.4 2003/10/14 08:09:35 sparq Exp $
  23 + * $Id: sch_htb.c,v 1.25 2003/12/07 11:08:25 devik Exp devik $
  24   */
  25  #include <linux/config.h>
  26  #include <linux/module.h>
  27 @@ -71,16 +77,12 @@
  28  #define HTB_HYSTERESIS 1/* whether to use mode hysteresis for speedup */
  29  #define HTB_QLOCK(S) spin_lock_bh(&(S)->dev->queue_lock)
  30  #define HTB_QUNLOCK(S) spin_unlock_bh(&(S)->dev->queue_lock)
  31 -#define HTB_VER 0x30007        /* major must be matched with number suplied by TC as version */
  32 +#define HTB_VER 0x30010        /* major must be matched with number suplied by TC as version */
  33
  34  #if HTB_VER >> 16 != TC_HTB_PROTOVER
  35  #error "Mismatched sch_htb.c and pkt_sch.h"
  36  #endif
  37
  38 -/* temporary debug defines to be removed after beta stage */
  39 -#define DEVIK_MEND(N)
  40 -#define DEVIK_MSTART(N)
  41 -
  42  /* debugging support; S is subsystem, these are defined:
  43    0 - netlink messages
  44    1 - enqueue
  45 @@ -100,13 +102,16 @@
  46   from LSB
  47   */
  48  #ifdef HTB_DEBUG
  49 -#define HTB_DBG(S,L,FMT,ARG...) if (((q->debug>>(2*S))&3) >= L) \
  50 +#define HTB_DBG_COND(S,L) (((q->debug>>(2*S))&3) >= L)
  51 +#define HTB_DBG(S,L,FMT,ARG...) if (HTB_DBG_COND(S,L)) \
  52         printk(KERN_DEBUG FMT,##ARG)
  53  #define HTB_CHCL(cl) BUG_TRAP((cl)->magic == HTB_CMAGIC)
  54  #define HTB_PASSQ q,
  55  #define HTB_ARGQ struct htb_sched *q,
  56  #define static
  57 +#undef __inline__
  58  #define __inline__
  59 +#undef inline
  60  #define inline
  61  #define HTB_CMAGIC 0xFEFAFEF1
  62  #define htb_safe_rb_erase(N,R) do { BUG_TRAP((N)->rb_color != -1); \
  63 @@ -114,6 +119,7 @@
  64                 rb_erase(N,R); \
  65                 (N)->rb_color = -1; } while (0)
  66  #else
  67 +#define HTB_DBG_COND(S,L) (0)
  68  #define HTB_DBG(S,L,FMT,ARG...)
  69  #define HTB_PASSQ
  70  #define HTB_ARGQ
  71 @@ -219,6 +225,9 @@
  72      /* time of nearest event per level (row) */
  73      unsigned long near_ev_cache[TC_HTB_MAXDEPTH];
  74
  75 +    /* cached value of jiffies in dequeue */
  76 +    unsigned long jiffies;
  77 +
  78      /* whether we hit non-work conserving class during this dequeue; we use */
  79      int nwc_hit;       /* this to disable mindelay complaint in dequeue */
  80
  81 @@ -297,7 +306,7 @@
  82            rules in it */
  83         if (skb->priority == sch->handle)
  84                 return HTB_DIRECT;  /* X:0 (direct flow) selected */
  85 -       if ((cl = htb_find(skb->priority,sch)) != NULL)
  86 +       if ((cl = htb_find(skb->priority,sch)) != NULL && cl->level == 0)
  87                 return cl;
  88
  89         tcf = q->filter_list;
  90 @@ -338,7 +347,7 @@
  91  static void htb_debug_dump (struct htb_sched *q)
  92  {
  93         int i,p;
  94 -       printk(KERN_DEBUG "htb*g j=%lu\n",jiffies);
  95 +       printk(KERN_DEBUG "htb*g j=%lu lj=%lu\n",jiffies,q->jiffies);
  96         /* rows */
  97         for (i=TC_HTB_MAXDEPTH-1;i>=0;i--) {
  98                 printk(KERN_DEBUG "htb*r%d m=%x",i,q->row_mask[i]);
  99 @@ -421,26 +430,24 @@
 100         if ((delay <= 0 || delay > cl->mbuffer) && net_ratelimit())
 101                 printk(KERN_ERR "HTB: suspicious delay in wait_tree d=%ld cl=%X h=%d\n",delay,cl->classid,debug_hint);
 102  #endif
 103 -       DEVIK_MSTART(9);
 104 -       cl->pq_key = jiffies + PSCHED_US2JIFFIE(delay);
 105 -       if (cl->pq_key == jiffies)
 106 +       cl->pq_key = q->jiffies + PSCHED_US2JIFFIE(delay);
 107 +       if (cl->pq_key == q->jiffies)
 108                 cl->pq_key++;
 109
 110         /* update the nearest event cache */
 111 -       if (q->near_ev_cache[cl->level] - cl->pq_key < 0x80000000)
 112 +       if (time_after(q->near_ev_cache[cl->level], cl->pq_key))
 113                 q->near_ev_cache[cl->level] = cl->pq_key;
 114
 115         while (*p) {
 116                 struct htb_class *c; parent = *p;
 117                 c = rb_entry(parent, struct htb_class, pq_node);
 118 -               if (cl->pq_key - c->pq_key < 0x80000000)
 119 +               if (time_after_eq(cl->pq_key, c->pq_key))
 120                         p = &parent->rb_right;
 121                 else
 122                         p = &parent->rb_left;
 123         }
 124         rb_link_node(&cl->pq_node, parent, p);
 125         rb_insert_color(&cl->pq_node, &q->wait_pq[cl->level]);
 126 -       DEVIK_MEND(9);
 127  }
 128
 129  /**
 130 @@ -453,12 +460,14 @@
 131  {
 132         rb_node_t *p;
 133         if ((*n)->rb_right) {
 134 +               /* child at right. use it or its leftmost ancestor */
 135                 *n = (*n)->rb_right;
 136                 while ((*n)->rb_left)
 137                         *n = (*n)->rb_left;
 138                 return;
 139         }
 140         while ((p = (*n)->rb_parent) != NULL) {
 141 +               /* if we've arrived from left child then we have next node */
 142                 if (p->rb_left == *n) break;
 143                 *n = p;
 144         }
 145 @@ -602,7 +611,7 @@
 146      long toks;
 147
 148      if ((toks = (cl->ctokens + *diff)) < (
 149 -#ifdef HTB_HYSTERESIS
 150 +#if HTB_HYSTERESIS
 151             cl->cmode != HTB_CANT_SEND ? -cl->cbuffer :
 152  #endif
 153                     0)) {
 154 @@ -610,7 +619,7 @@
 155             return HTB_CANT_SEND;
 156      }
 157      if ((toks = (cl->tokens + *diff)) >= (
 158 -#ifdef HTB_HYSTERESIS
 159 +#if HTB_HYSTERESIS
 160             cl->cmode == HTB_CAN_SEND ? -cl->buffer :
 161  #endif
 162             0))
 163 @@ -689,7 +698,6 @@
 164      struct htb_sched *q = (struct htb_sched *)sch->data;
 165      struct htb_class *cl = htb_classify(skb,sch);
 166
 167 -    DEVIK_MSTART(0);
 168      if (cl == HTB_DIRECT || !cl) {
 169         /* enqueue to helper queue */
 170         if (q->direct_queue.qlen < q->direct_qlen && cl) {
 171 @@ -698,25 +706,20 @@
 172         } else {
 173             kfree_skb (skb);
 174             sch->stats.drops++;
 175 -           DEVIK_MEND(0);
 176             return NET_XMIT_DROP;
 177         }
 178      } else if (cl->un.leaf.q->enqueue(skb, cl->un.leaf.q) != NET_XMIT_SUCCESS) {
 179         sch->stats.drops++;
 180         cl->stats.drops++;
 181 -       DEVIK_MEND(0);
 182         return NET_XMIT_DROP;
 183      } else {
 184         cl->stats.packets++; cl->stats.bytes += skb->len;
 185 -       DEVIK_MSTART(1);
 186         htb_activate (q,cl);
 187 -       DEVIK_MEND(1);
 188      }
 189
 190      sch->q.qlen++;
 191      sch->stats.packets++; sch->stats.bytes += skb->len;
 192 -    HTB_DBG(1,1,"htb_enq_ok cl=%X skb=%p\n",cl?cl->classid:0,skb);
 193 -    DEVIK_MEND(0);
 194 +    HTB_DBG(1,1,"htb_enq_ok cl=%X skb=%p\n",(cl && cl != HTB_DIRECT)?cl->classid:0,skb);
 195      return NET_XMIT_SUCCESS;
 196  }
 197
 198 @@ -725,16 +728,18 @@
 199  {
 200      struct htb_sched *q = (struct htb_sched *)sch->data;
 201      struct htb_class *cl = htb_classify(skb,sch);
 202 +    struct sk_buff *tskb;
 203
 204      if (cl == HTB_DIRECT || !cl) {
 205         /* enqueue to helper queue */
 206         if (q->direct_queue.qlen < q->direct_qlen && cl) {
 207 -           __skb_queue_tail(&q->direct_queue, skb);
 208 -           q->direct_pkts++;
 209 +           __skb_queue_head(&q->direct_queue, skb);
 210         } else {
 211 -           kfree_skb (skb);
 212 -           sch->stats.drops++;
 213 -           return NET_XMIT_DROP;
 214 +            __skb_queue_head(&q->direct_queue, skb);
 215 +            tskb = __skb_dequeue_tail(&q->direct_queue);
 216 +            kfree_skb (tskb);
 217 +            sch->stats.drops++;
 218 +            return NET_XMIT_CN;
 219         }
 220      } else if (cl->un.leaf.q->ops->requeue(skb, cl->un.leaf.q) != NET_XMIT_SUCCESS) {
 221         sch->stats.drops++;
 222 @@ -744,7 +749,7 @@
 223             htb_activate (q,cl);
 224
 225      sch->q.qlen++;
 226 -    HTB_DBG(1,1,"htb_req_ok cl=%X skb=%p\n",cl?cl->classid:0,skb);
 227 +    HTB_DBG(1,1,"htb_req_ok cl=%X skb=%p\n",(cl && cl != HTB_DIRECT)?cl->classid:0,skb);
 228      return NET_XMIT_SUCCESS;
 229  }
 230
 231 @@ -819,7 +824,7 @@
 232                                        cl->classid, diff,
 233                                        (unsigned long long) q->now,
 234                                        (unsigned long long) cl->t_c,
 235 -                                      jiffies);
 236 +                                      q->jiffies);
 237                         diff = 1000;
 238                 }
 239  #endif
 240 @@ -862,6 +867,7 @@
 241   *
 242   * Scans event queue for pending events and applies them. Returns jiffies to
 243   * next pending event (0 for no event in pq).
 244 + * Note: Aplied are events whose have cl->pq_key <= jiffies.
 245   */
 246  static long htb_do_events(struct htb_sched *q,int level)
 247  {
 248 @@ -876,9 +882,9 @@
 249                 while (p->rb_left) p = p->rb_left;
 250
 251                 cl = rb_entry(p, struct htb_class, pq_node);
 252 -               if (cl->pq_key - (jiffies+1) < 0x80000000) {
 253 -                       HTB_DBG(8,3,"htb_do_ev_ret delay=%ld\n",cl->pq_key - jiffies);
 254 -                       return cl->pq_key - jiffies;
 255 +               if (time_after(cl->pq_key, q->jiffies)) {
 256 +                       HTB_DBG(8,3,"htb_do_ev_ret delay=%ld\n",cl->pq_key - q->jiffies);
 257 +                       return cl->pq_key - q->jiffies;
 258                 }
 259                 htb_safe_rb_erase(p,q->wait_pq+level);
 260                 diff = PSCHED_TDIFF_SAFE(q->now, cl->t_c, (u32)cl->mbuffer, 0);
 261 @@ -889,7 +895,7 @@
 262                                        cl->classid, diff,
 263                                        (unsigned long long) q->now,
 264                                        (unsigned long long) cl->t_c,
 265 -                                      jiffies);
 266 +                                      q->jiffies);
 267                         diff = 1000;
 268                 }
 269  #endif
 270 @@ -916,6 +922,7 @@
 271                 rb_node_t **pptr;
 272         } stk[TC_HTB_MAXDEPTH],*sp = stk;
 273
 274 +       BUG_TRAP(tree->rb_node);
 275         sp->root = tree->rb_node;
 276         sp->pptr = pptr;
 277
 278 @@ -949,16 +956,36 @@
 279  htb_dequeue_tree(struct htb_sched *q,int prio,int level)
 280  {
 281         struct sk_buff *skb = NULL;
 282 -       //struct htb_sched *q = (struct htb_sched *)sch->data;
 283         struct htb_class *cl,*start;
 284         /* look initial class up in the row */
 285 -       DEVIK_MSTART(6);
 286         start = cl = htb_lookup_leaf (q->row[level]+prio,prio,q->ptr[level]+prio);
 287
 288         do {
 289 -               BUG_TRAP(cl && cl->un.leaf.q->q.qlen); if (!cl) return NULL;
 290 +next:
 291 +               BUG_TRAP(cl);
 292 +               if (!cl) return NULL;
 293                 HTB_DBG(4,1,"htb_deq_tr prio=%d lev=%d cl=%X defic=%d\n",
 294                                 prio,level,cl->classid,cl->un.leaf.deficit[level]);
 295 +
 296 +               /* class can be empty - it is unlikely but can be true if leaf
 297 +                  qdisc drops packets in enqueue routine or if someone used
 298 +                  graft operation on the leaf since last dequeue;
 299 +                  simply deactivate and skip such class */
 300 +               if (unlikely(cl->un.leaf.q->q.qlen == 0)) {
 301 +                       struct htb_class *next;
 302 +                       htb_deactivate(q,cl);
 303 +
 304 +                       /* row/level might become empty */
 305 +                       if ((q->row_mask[level] & (1 << prio)) == 0)
 306 +                               return NULL;
 307 +
 308 +                       next = htb_lookup_leaf (q->row[level]+prio,
 309 +                                       prio,q->ptr[level]+prio);
 310 +                       if (cl == start) /* fix start if we just deleted it */
 311 +                               start = next;
 312 +                       cl = next;
 313 +                       goto next;
 314 +               }
 315
 316                 if (likely((skb = cl->un.leaf.q->dequeue(cl->un.leaf.q)) != NULL))
 317                         break;
 318 @@ -971,8 +998,6 @@
 319                 cl = htb_lookup_leaf (q->row[level]+prio,prio,q->ptr[level]+prio);
 320         } while (cl != start);
 321
 322 -       DEVIK_MEND(6);
 323 -       DEVIK_MSTART(7);
 324         if (likely(skb != NULL)) {
 325                 if ((cl->un.leaf.deficit[level] -= skb->len) < 0) {
 326                         HTB_DBG(4,2,"htb_next_cl oldptr=%p quant_add=%d\n",
 327 @@ -984,11 +1009,8 @@
 328                    gives us slightly better performance */
 329                 if (!cl->un.leaf.q->q.qlen)
 330                         htb_deactivate (q,cl);
 331 -       DEVIK_MSTART(8);
 332                 htb_charge_class (q,cl,level,skb->len);
 333 -       DEVIK_MEND(8);
 334         }
 335 -       DEVIK_MEND(7);
 336         return skb;
 337  }
 338
 339 @@ -1002,9 +1024,8 @@
 340                         printk(KERN_INFO "HTB delay %ld > 5sec\n", delay);
 341                 delay = 5*HZ;
 342         }
 343 -       del_timer(&q->timer);
 344 -       q->timer.expires = jiffies + delay;
 345 -       add_timer(&q->timer);
 346 +       /* why don't use jiffies here ? because expires can be in past */
 347 +       mod_timer(&q->timer, q->jiffies + delay);
 348         sch->flags |= TCQ_F_THROTTLED;
 349         sch->stats.overlimits++;
 350         HTB_DBG(3,1,"htb_deq t_delay=%ld\n",delay);
 351 @@ -1016,7 +1037,11 @@
 352         struct htb_sched *q = (struct htb_sched *)sch->data;
 353         int level;
 354         long min_delay;
 355 +#ifdef HTB_DEBUG
 356 +       int evs_used = 0;
 357 +#endif
 358
 359 +       q->jiffies = jiffies;
 360         HTB_DBG(3,1,"htb_deq dircnt=%d qlen=%d\n",skb_queue_len(&q->direct_queue),
 361                         sch->q.qlen);
 362
 363 @@ -1027,27 +1052,26 @@
 364                 return skb;
 365         }
 366
 367 -       DEVIK_MSTART(2);
 368         if (!sch->q.qlen) goto fin;
 369         PSCHED_GET_TIME(q->now);
 370
 371 -       min_delay = HZ*5;
 372 +       min_delay = LONG_MAX;
 373         q->nwc_hit = 0;
 374         for (level = 0; level < TC_HTB_MAXDEPTH; level++) {
 375                 /* common case optimization - skip event handler quickly */
 376                 int m;
 377                 long delay;
 378 -       DEVIK_MSTART(3);
 379 -               if (jiffies - q->near_ev_cache[level] < 0x80000000 || 0) {
 380 +               if (time_after_eq(q->jiffies, q->near_ev_cache[level])) {
 381                         delay = htb_do_events(q,level);
 382 -                       q->near_ev_cache[level] += delay ? delay : HZ;
 383 +                       q->near_ev_cache[level] = q->jiffies + (delay ? delay : HZ);
 384 +#ifdef HTB_DEBUG
 385 +                       evs_used++;
 386 +#endif
 387                 } else
 388 -                       delay = q->near_ev_cache[level] - jiffies;
 389 +                       delay = q->near_ev_cache[level] - q->jiffies;
 390
 391                 if (delay && min_delay > delay)
 392                         min_delay = delay;
 393 -       DEVIK_MEND(3);
 394 -       DEVIK_MSTART(5);
 395                 m = ~q->row_mask[level];
 396                 while (m != (int)(-1)) {
 397                         int prio = ffz (m);
 398 @@ -1056,29 +1080,29 @@
 399                         if (likely(skb != NULL)) {
 400                                 sch->q.qlen--;
 401                                 sch->flags &= ~TCQ_F_THROTTLED;
 402 -       DEVIK_MEND(5);
 403                                 goto fin;
 404                         }
 405                 }
 406 -       DEVIK_MEND(5);
 407         }
 408 -       DEVIK_MSTART(4);
 409  #ifdef HTB_DEBUG
 410 -       if (!q->nwc_hit && min_delay >= 5*HZ && net_ratelimit()) {
 411 -               printk(KERN_ERR "HTB: mindelay=%ld, report it please !\n",min_delay);
 412 -               htb_debug_dump(q);
 413 +       if (!q->nwc_hit && min_delay >= 10*HZ && net_ratelimit()) {
 414 +               if (min_delay == LONG_MAX) {
 415 +                       printk(KERN_ERR "HTB: dequeue bug (%d,%lu,%lu), report it please !\n",
 416 +                                       evs_used,q->jiffies,jiffies);
 417 +                       htb_debug_dump(q);
 418 +               } else
 419 +                       printk(KERN_WARNING "HTB: mindelay=%ld, some class has "
 420 +                                       "too small rate\n",min_delay);
 421         }
 422  #endif
 423 -       htb_delay_by (sch,min_delay);
 424 -       DEVIK_MEND(4);
 425 +       htb_delay_by (sch,min_delay > 5*HZ ? 5*HZ : min_delay);
 426  fin:
 427 -       HTB_DBG(3,1,"htb_deq_end %s j=%lu skb=%p\n",sch->dev->name,jiffies,skb);
 428 -       DEVIK_MEND(2);
 429 +       HTB_DBG(3,1,"htb_deq_end %s j=%lu skb=%p\n",sch->dev->name,q->jiffies,skb);
 430         return skb;
 431  }
 432
 433  /* try to drop from each class (by prio) until one succeed */
 434 -static int htb_drop(struct Qdisc* sch)
 435 +static unsigned int htb_drop(struct Qdisc* sch)
 436  {
 437         struct htb_sched *q = (struct htb_sched *)sch->data;
 438         int prio;
 439 @@ -1086,14 +1110,15 @@
 440         for (prio = TC_HTB_NUMPRIO - 1; prio >= 0; prio--) {
 441                 struct list_head *p;
 442                 list_for_each (p,q->drops+prio) {
 443 -                       struct htb_class *cl = list_entry(p,struct htb_class,
 444 -                                       un.leaf.drop_list);
 445 +                       struct htb_class *cl = list_entry(p, struct htb_class,
 446 +                                                         un.leaf.drop_list);
 447 +                       unsigned int len;
 448                         if (cl->un.leaf.q->ops->drop &&
 449 -                               cl->un.leaf.q->ops->drop(cl->un.leaf.q)) {
 450 +                               (len = cl->un.leaf.q->ops->drop(cl->un.leaf.q))) {
 451                                 sch->q.qlen--;
 452                                 if (!cl->un.leaf.q->q.qlen)
 453                                         htb_deactivate (q,cl);
 454 -                               return 1;
 455 +                               return len;
 456                         }
 457                 }
 458         }
 459 @@ -1208,7 +1233,8 @@
 460         gopt.direct_pkts = q->direct_pkts;
 461
 462  #ifdef HTB_DEBUG
 463 -       htb_debug_dump(q);
 464 +       if (HTB_DBG_COND(0,2))
 465 +               htb_debug_dump(q);
 466  #endif
 467         gopt.version = HTB_VER;
 468         gopt.rate2quantum = q->rate2quantum;
 469 @@ -1289,6 +1315,9 @@
 470                                         return -ENOBUFS;
 471                 sch_tree_lock(sch);
 472                 if ((*old = xchg(&cl->un.leaf.q, new)) != NULL) {
 473 +                       if (cl->prio_activity)
 474 +                               htb_deactivate ((struct htb_sched*)sch->data,cl);
 475 +
 476                         /* TODO: is it correct ? Why CBQ doesn't do it ? */
 477                         sch->q.qlen -= (*old)->q.qlen;
 478                         qdisc_reset(*old);
 479 @@ -1323,7 +1352,7 @@
 480
 481         while ((tp = *fl) != NULL) {
 482                 *fl = tp->next;
 483 -               tp->ops->destroy(tp);
 484 +               tcf_destroy(tp);
 485         }
 486  }
 487
 488 @@ -1371,11 +1400,16 @@
 489  #ifdef HTB_RATECM
 490         del_timer_sync (&q->rttim);
 491  #endif
 492 +       /* This line used to be after htb_destroy_class call below
 493 +          and surprisingly it worked in 2.4. But it must precede it
 494 +          because filter need its target class alive to be able to call
 495 +          unbind_filter on it (without Oops). */
 496 +       htb_destroy_filters(&q->filter_list);
 497 +
 498         while (!list_empty(&q->root))
 499                 htb_destroy_class (sch,list_entry(q->root.next,
 500                                         struct htb_class,sibling));
 501
 502 -       htb_destroy_filters(&q->filter_list);
 503         __skb_queue_purge(&q->direct_queue);
 504         MOD_DEC_USE_COUNT;
 505  }
 506 @@ -1438,12 +1472,13 @@
 507         parent = parentid == TC_H_ROOT ? NULL : htb_find (parentid,sch);
 508
 509         hopt = RTA_DATA(tb[TCA_HTB_PARMS-1]);
 510 -       HTB_DBG(0,1,"htb_chg cl=%p, clid=%X, opt/prio=%d, rate=%u, buff=%d, quant=%d\n", cl,cl?cl->classid:0,(int)hopt->prio,hopt->rate.rate,hopt->buffer,hopt->quantum);
 511 +       HTB_DBG(0,1,"htb_chg cl=%p(%X), clid=%X, parid=%X, opt/prio=%d, rate=%u, buff=%d, quant=%d\n", cl,cl?cl->classid:0,classid,parentid,(int)hopt->prio,hopt->rate.rate,hopt->buffer,hopt->quantum);
 512         rtab = qdisc_get_rtab(&hopt->rate, tb[TCA_HTB_RTAB-1]);
 513         ctab = qdisc_get_rtab(&hopt->ceil, tb[TCA_HTB_CTAB-1]);
 514         if (!rtab || !ctab) goto failure;
 515
 516         if (!cl) { /* new class */
 517 +               struct Qdisc *new_q;
 518                 /* check for valid classid */
 519                 if (!classid || TC_H_MAJ(classid^sch->handle) || htb_find(classid,sch))
 520                         goto failure;
 521 @@ -1467,6 +1502,10 @@
 522                 cl->magic = HTB_CMAGIC;
 523  #endif
 524
 525 +               /* create leaf qdisc early because it uses kmalloc(GFP_KERNEL)
 526 +                  so that can't be used inside of sch_tree_lock
 527 +                  -- thanks to Karlis Peisenieks */
 528 +               new_q = qdisc_create_dflt(sch->dev, &pfifo_qdisc_ops);
 529                 sch_tree_lock(sch);
 530                 if (parent && !parent->level) {
 531                         /* turn parent into inner node */
 532 @@ -1485,8 +1524,7 @@
 533                         memset (&parent->un.inner,0,sizeof(parent->un.inner));
 534                 }
 535                 /* leaf (we) needs elementary qdisc */
 536 -               if (!(cl->un.leaf.q = qdisc_create_dflt(sch->dev, &pfifo_qdisc_ops)))
 537 -                       cl->un.leaf.q = &noop_qdisc;
 538 +               cl->un.leaf.q = new_q ? new_q : &noop_qdisc;
 539
 540                 cl->classid = classid; cl->parent = parent;
 541
 542 @@ -1514,11 +1552,11 @@
 543         if (!cl->level) {
 544                 cl->un.leaf.quantum = rtab->rate.rate / q->rate2quantum;
 545                 if (!hopt->quantum && cl->un.leaf.quantum < 1000) {
 546 -                       printk(KERN_WARNING "HTB: quantum of class %X is small. Consider r2q change.", cl->classid);
 547 +                       printk(KERN_WARNING "HTB: quantum of class %X is small. Consider r2q change.\n", cl->classid);
 548                         cl->un.leaf.quantum = 1000;
 549                 }
 550                 if (!hopt->quantum && cl->un.leaf.quantum > 200000) {
 551 -                       printk(KERN_WARNING "HTB: quantum of class %X is big. Consider r2q change.", cl->classid);
 552 +                       printk(KERN_WARNING "HTB: quantum of class %X is big. Consider r2q change.\n", cl->classid);
 553                         cl->un.leaf.quantum = 200000;
 554                 }
 555                 if (hopt->quantum)
 556 --- src/linux/linux/include/net/pkt_cls.h       2003-07-04 01:12:28.000000000 -0700
 557 +++ src/linux/linux.2.4.26/include/net/pkt_cls.h        2004-05-10 22:21:40.000000000 -0700
 558 @@ -77,7 +77,11 @@
 559         return -1;
 560  }
 561
 562 -
 563 +static inline void tcf_destroy(struct tcf_proto *tp)
 564 +{
 565 +       tp->ops->destroy(tp);
 566 +       kfree(tp);
 567 +}
 568
 569  extern int register_tcf_proto_ops(struct tcf_proto_ops *ops);
 570  extern int unregister_tcf_proto_ops(struct tcf_proto_ops *ops);