target/linux/generic-2.6/patches-2.6.28/260-extend_pfifo_fast.patch

   1 --- a/net/sched/sch_generic.c
   2 +++ b/net/sched/sch_generic.c
   3 @@ -382,16 +382,50 @@ static const u8 prio2band[TC_PRIO_MAX+1]
   4
   5  #define PFIFO_FAST_BANDS 3
   6
   7 +struct pfifo_fast_sched_data {
   8 +       struct tcf_proto *filter_list;
   9 +       struct sk_buff_head list[PFIFO_FAST_BANDS];
  10 +};
  11 +
  12  static inline struct sk_buff_head *prio2list(struct sk_buff *skb,
  13                                              struct Qdisc *qdisc)
  14  {
  15 -       struct sk_buff_head *list = qdisc_priv(qdisc);
  16 +       struct pfifo_fast_sched_data *q = qdisc_priv(qdisc);
  17 +       struct sk_buff_head *list = q->list;
  18         return list + prio2band[skb->priority & TC_PRIO_MAX];
  19  }
  20
  21 +static int pfifo_fast_filter(struct sk_buff *skb, struct Qdisc* qdisc)
  22 +{
  23 +#ifdef CONFIG_NET_CLS_ACT
  24 +       struct pfifo_fast_sched_data *q = qdisc_priv(qdisc);
  25 +       int result = 0, ret = NET_XMIT_SUCCESS | __NET_XMIT_STOLEN;
  26 +       struct tcf_result res;
  27 +
  28 +       if (q->filter_list != NULL)
  29 +               result = tc_classify(skb, q->filter_list, &res);
  30 +       if (result >= 0) {
  31 +               switch (result) {
  32 +               case TC_ACT_STOLEN:
  33 +               case TC_ACT_QUEUED:
  34 +                       ret = NET_XMIT_SUCCESS | __NET_XMIT_STOLEN;
  35 +               case TC_ACT_SHOT:
  36 +                       kfree_skb(skb);
  37 +                       return ret;
  38 +               }
  39 +       }
  40 +#endif
  41 +       return 0;
  42 +}
  43 +
  44  static int pfifo_fast_enqueue(struct sk_buff *skb, struct Qdisc* qdisc)
  45  {
  46         struct sk_buff_head *list = prio2list(skb, qdisc);
  47 +       int ret;
  48 +
  49 +       ret = pfifo_fast_filter(skb, qdisc);
  50 +       if (ret)
  51 +               return ret;
  52
  53         if (skb_queue_len(list) < qdisc_dev(qdisc)->tx_queue_len) {
  54                 qdisc->q.qlen++;
  55 @@ -403,8 +437,9 @@ static int pfifo_fast_enqueue(struct sk_
  56
  57  static struct sk_buff *pfifo_fast_dequeue(struct Qdisc* qdisc)
  58  {
  59 +       struct pfifo_fast_sched_data *q = qdisc_priv(qdisc);
  60 +       struct sk_buff_head *list = q->list;
  61         int prio;
  62 -       struct sk_buff_head *list = qdisc_priv(qdisc);
  63
  64         for (prio = 0; prio < PFIFO_FAST_BANDS; prio++) {
  65                 if (!skb_queue_empty(list + prio)) {
  66 @@ -424,8 +459,9 @@ static int pfifo_fast_requeue(struct sk_
  67
  68  static void pfifo_fast_reset(struct Qdisc* qdisc)
  69  {
  70 +       struct pfifo_fast_sched_data *q = qdisc_priv(qdisc);
  71 +       struct sk_buff_head *list = q->list;
  72         int prio;
  73 -       struct sk_buff_head *list = qdisc_priv(qdisc);
  74
  75         for (prio = 0; prio < PFIFO_FAST_BANDS; prio++)
  76                 __qdisc_reset_queue(qdisc, list + prio);
  77 @@ -448,8 +484,9 @@ nla_put_failure:
  78
  79  static int pfifo_fast_init(struct Qdisc *qdisc, struct nlattr *opt)
  80  {
  81 +       struct pfifo_fast_sched_data *q = qdisc_priv(qdisc);
  82 +       struct sk_buff_head *list = q->list;
  83         int prio;
  84 -       struct sk_buff_head *list = qdisc_priv(qdisc);
  85
  86         for (prio = 0; prio < PFIFO_FAST_BANDS; prio++)
  87                 skb_queue_head_init(list + prio);
  88 @@ -457,9 +494,36 @@ static int pfifo_fast_init(struct Qdisc
  89         return 0;
  90  }
  91
  92 +static int pfifo_fast_change_class(struct Qdisc *qdisc, u32 classid, u32 parentid,
  93 +                           struct nlattr **tca, unsigned long *arg)
  94 +{
  95 +       return -EOPNOTSUPP;
  96 +}
  97 +
  98 +static unsigned long pfifo_fast_get(struct Qdisc *qdisc, u32 classid)
  99 +{
 100 +       return 0;
 101 +}
 102 +
 103 +static struct tcf_proto **pfifo_fast_find_tcf(struct Qdisc *qdisc, unsigned long cl)
 104 +{
 105 +       struct pfifo_fast_sched_data *q = qdisc_priv(qdisc);
 106 +
 107 +       if (cl)
 108 +               return NULL;
 109 +       return &q->filter_list;
 110 +}
 111 +
 112 +static const struct Qdisc_class_ops pfifo_fast_class_ops = {
 113 +       .get            =       pfifo_fast_get,
 114 +       .change         =       pfifo_fast_change_class,
 115 +       .tcf_chain      =       pfifo_fast_find_tcf,
 116 +};
 117 +
 118  static struct Qdisc_ops pfifo_fast_ops __read_mostly = {
 119         .id             =       "pfifo_fast",
 120 -       .priv_size      =       PFIFO_FAST_BANDS * sizeof(struct sk_buff_head),
 121 +       .cl_ops         =       &pfifo_fast_class_ops,
 122 +       .priv_size      =       sizeof(struct pfifo_fast_sched_data),
 123         .enqueue        =       pfifo_fast_enqueue,
 124         .dequeue        =       pfifo_fast_dequeue,
 125         .requeue        =       pfifo_fast_requeue,
 126 @@ -739,3 +803,18 @@ void dev_shutdown(struct net_device *dev
 127         shutdown_scheduler_queue(dev, &dev->rx_queue, &noop_qdisc);
 128         WARN_ON(timer_pending(&dev->watchdog_timer));
 129  }
 130 +
 131 +#ifdef CONFIG_NET_SCHED
 132 +static int __init sch_generic_init(void)
 133 +{
 134 +       return register_qdisc(&pfifo_fast_ops);
 135 +}
 136 +
 137 +static void __exit sch_generic_exit(void)
 138 +{
 139 +       unregister_qdisc(&pfifo_fast_ops);
 140 +}
 141 +
 142 +module_init(sch_generic_init)
 143 +module_exit(sch_generic_exit)
 144 +#endif