[NET_SCHED]: sch_sfq: make internal queues visible as classes

Add support for dumping statistics and make internal queues visible as
classes.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/include/linux/pkt_sched.h b/include/linux/pkt_sched.h
index 3276135..dbb7ac3 100644 (file)
--- a/include/linux/pkt_sched.h
+++ b/include/linux/pkt_sched.h
@@ -150,6 +150,11 @@ struct tc_sfq_qopt
        unsigned        flows;          /* Maximal number of flows  */
 };
 
+struct tc_sfq_xstats
+{
+       __s32           allot;
+};
+
 /*
  *  NOTE: limit, divisor and flows are hardwired to code at the moment.
  *

diff --git a/net/sched/sch_sfq.c b/net/sched/sch_sfq.c
index d818d19..a20e2ef 100644 (file)
--- a/net/sched/sch_sfq.c
+++ b/net/sched/sch_sfq.c
@@ -566,15 +566,54 @@ static struct tcf_proto **sfq_find_tcf(struct Qdisc *sch, unsigned long cl)
        return &q->filter_list;
 }
 
+static int sfq_dump_class(struct Qdisc *sch, unsigned long cl,
+                         struct sk_buff *skb, struct tcmsg *tcm)
+{
+       tcm->tcm_handle |= TC_H_MIN(cl);
+       return 0;
+}
+
+static int sfq_dump_class_stats(struct Qdisc *sch, unsigned long cl,
+                               struct gnet_dump *d)
+{
+       struct sfq_sched_data *q = qdisc_priv(sch);
+       sfq_index idx = q->ht[cl-1];
+       struct gnet_stats_queue qs = { .qlen = q->qs[idx].qlen };
+       struct tc_sfq_xstats xstats = { .allot = q->allot[idx] };
+
+       if (gnet_stats_copy_queue(d, &qs) < 0)
+               return -1;
+       return gnet_stats_copy_app(d, &xstats, sizeof(xstats));
+}
+
 static void sfq_walk(struct Qdisc *sch, struct qdisc_walker *arg)
 {
-       return;
+       struct sfq_sched_data *q = qdisc_priv(sch);
+       unsigned int i;
+
+       if (arg->stop)
+               return;
+
+       for (i = 0; i < SFQ_HASH_DIVISOR; i++) {
+               if (q->ht[i] == SFQ_DEPTH ||
+                   arg->count < arg->skip) {
+                       arg->count++;
+                       continue;
+               }
+               if (arg->fn(sch, i + 1, arg) < 0) {
+                       arg->stop = 1;
+                       break;
+               }
+               arg->count++;
+       }
 }
 
 static const struct Qdisc_class_ops sfq_class_ops = {
        .get            =       sfq_get,
        .change         =       sfq_change_class,
        .tcf_chain      =       sfq_find_tcf,
+       .dump           =       sfq_dump_class,
+       .dump_stats     =       sfq_dump_class_stats,
        .walk           =       sfq_walk,
 };