sch_red: generalize accurate MAX_P support to RED/GRED/CHOKE

[cascardo/linux.git] / net / sched / sch_red.c

diff --git a/net/sched/sch_red.c b/net/sched/sch_red.c
index 8f5a85b..ce2256a 100644 (file)
--- a/net/sched/sch_red.c
+++ b/net/sched/sch_red.c
@@ -170,6 +170,7 @@ static void red_destroy(struct Qdisc *sch)
 static const struct nla_policy red_policy[TCA_RED_MAX + 1] = {
        [TCA_RED_PARMS] = { .len = sizeof(struct tc_red_qopt) },
        [TCA_RED_STAB]  = { .len = RED_STAB_SIZE },
+       [TCA_RED_MAX_P] = { .type = NLA_U32 },
 };
 
 static int red_change(struct Qdisc *sch, struct nlattr *opt)
@@ -179,6 +180,7 @@ static int red_change(struct Qdisc *sch, struct nlattr *opt)
        struct tc_red_qopt *ctl;
        struct Qdisc *child = NULL;
        int err;
+       u32 max_P;
 
        if (opt == NULL)
                return -EINVAL;
@@ -191,6 +193,8 @@ static int red_change(struct Qdisc *sch, struct nlattr *opt)
            tb[TCA_RED_STAB] == NULL)
                return -EINVAL;
 
+       max_P = tb[TCA_RED_MAX_P] ? nla_get_u32(tb[TCA_RED_MAX_P]) : 0;
+
        ctl = nla_data(tb[TCA_RED_PARMS]);
 
        if (ctl->limit > 0) {
@@ -209,8 +213,9 @@ static int red_change(struct Qdisc *sch, struct nlattr *opt)
        }
 
        red_set_parms(&q->parms, ctl->qth_min, ctl->qth_max, ctl->Wlog,
-                                ctl->Plog, ctl->Scell_log,
-                                nla_data(tb[TCA_RED_STAB]));
+                     ctl->Plog, ctl->Scell_log,
+                     nla_data(tb[TCA_RED_STAB]),
+                     max_P);
 
        del_timer(&q->adapt_timer);
        if (ctl->flags & TC_RED_ADAPTATIVE)