aboutsummaryrefslogtreecommitdiff
path: root/net/sched/sch_gred.c
diff options
context:
space:
mode:
Diffstat (limited to 'net/sched/sch_gred.c')
-rw-r--r--net/sched/sch_gred.c81
1 files changed, 51 insertions, 30 deletions
diff --git a/net/sched/sch_gred.c b/net/sched/sch_gred.c
index 6cd8ddfb512..0b15236be7b 100644
--- a/net/sched/sch_gred.c
+++ b/net/sched/sch_gred.c
@@ -34,13 +34,14 @@ struct gred_sched;
struct gred_sched_data {
u32 limit; /* HARD maximal queue length */
- u32 DP; /* the drop pramaters */
+ u32 DP; /* the drop parameters */
u32 bytesin; /* bytes seen on virtualQ so far*/
u32 packetsin; /* packets seen on virtualQ so far*/
u32 backlog; /* bytes on the virtualQ */
u8 prio; /* the prio of this vq */
struct red_parms parms;
+ struct red_vars vars;
struct red_stats stats;
};
@@ -55,7 +56,7 @@ struct gred_sched {
u32 red_flags;
u32 DPs;
u32 def;
- struct red_parms wred_set;
+ struct red_vars wred_set;
};
static inline int gred_wred_mode(struct gred_sched *table)
@@ -125,17 +126,17 @@ static inline u16 tc_index_to_dp(struct sk_buff *skb)
return skb->tc_index & GRED_VQ_MASK;
}
-static inline void gred_load_wred_set(struct gred_sched *table,
+static inline void gred_load_wred_set(const struct gred_sched *table,
struct gred_sched_data *q)
{
- q->parms.qavg = table->wred_set.qavg;
- q->parms.qidlestart = table->wred_set.qidlestart;
+ q->vars.qavg = table->wred_set.qavg;
+ q->vars.qidlestart = table->wred_set.qidlestart;
}
static inline void gred_store_wred_set(struct gred_sched *table,
struct gred_sched_data *q)
{
- table->wred_set.qavg = q->parms.qavg;
+ table->wred_set.qavg = q->vars.qavg;
}
static inline int gred_use_ecn(struct gred_sched *t)
@@ -170,7 +171,7 @@ static int gred_enqueue(struct sk_buff *skb, struct Qdisc *sch)
goto drop;
}
- /* fix tc_index? --could be controvesial but needed for
+ /* fix tc_index? --could be controversial but needed for
requeueing */
skb->tc_index = (skb->tc_index & ~GRED_VQ_MASK) | dp;
}
@@ -181,8 +182,8 @@ static int gred_enqueue(struct sk_buff *skb, struct Qdisc *sch)
for (i = 0; i < t->DPs; i++) {
if (t->tab[i] && t->tab[i]->prio < q->prio &&
- !red_is_idling(&t->tab[i]->parms))
- qavg += t->tab[i]->parms.qavg;
+ !red_is_idling(&t->tab[i]->vars))
+ qavg += t->tab[i]->vars.qavg;
}
}
@@ -193,15 +194,17 @@ static int gred_enqueue(struct sk_buff *skb, struct Qdisc *sch)
if (gred_wred_mode(t))
gred_load_wred_set(t, q);
- q->parms.qavg = red_calc_qavg(&q->parms, gred_backlog(t, q, sch));
+ q->vars.qavg = red_calc_qavg(&q->parms,
+ &q->vars,
+ gred_backlog(t, q, sch));
- if (red_is_idling(&q->parms))
- red_end_of_idle_period(&q->parms);
+ if (red_is_idling(&q->vars))
+ red_end_of_idle_period(&q->vars);
if (gred_wred_mode(t))
gred_store_wred_set(t, q);
- switch (red_action(&q->parms, q->parms.qavg + qavg)) {
+ switch (red_action(&q->parms, &q->vars, q->vars.qavg + qavg)) {
case RED_DONT_MARK:
break;
@@ -260,7 +263,7 @@ static struct sk_buff *gred_dequeue(struct Qdisc *sch)
q->backlog -= qdisc_pkt_len(skb);
if (!q->backlog && !gred_wred_mode(t))
- red_start_of_idle_period(&q->parms);
+ red_start_of_idle_period(&q->vars);
}
return skb;
@@ -293,7 +296,7 @@ static unsigned int gred_drop(struct Qdisc *sch)
q->stats.other++;
if (!q->backlog && !gred_wred_mode(t))
- red_start_of_idle_period(&q->parms);
+ red_start_of_idle_period(&q->vars);
}
qdisc_drop(skb, sch);
@@ -320,7 +323,7 @@ static void gred_reset(struct Qdisc *sch)
if (!q)
continue;
- red_restart(&q->parms);
+ red_restart(&q->vars);
q->backlog = 0;
}
}
@@ -379,29 +382,31 @@ static inline int gred_change_table_def(struct Qdisc *sch, struct nlattr *dps)
}
static inline int gred_change_vq(struct Qdisc *sch, int dp,
- struct tc_gred_qopt *ctl, int prio, u8 *stab)
+ struct tc_gred_qopt *ctl, int prio,
+ u8 *stab, u32 max_P,
+ struct gred_sched_data **prealloc)
{
struct gred_sched *table = qdisc_priv(sch);
- struct gred_sched_data *q;
+ struct gred_sched_data *q = table->tab[dp];
- if (table->tab[dp] == NULL) {
- table->tab[dp] = kzalloc(sizeof(*q), GFP_ATOMIC);
- if (table->tab[dp] == NULL)
+ if (!q) {
+ table->tab[dp] = q = *prealloc;
+ *prealloc = NULL;
+ if (!q)
return -ENOMEM;
}
- q = table->tab[dp];
q->DP = dp;
q->prio = prio;
q->limit = ctl->limit;
if (q->backlog == 0)
- red_end_of_idle_period(&q->parms);
+ red_end_of_idle_period(&q->vars);
red_set_parms(&q->parms,
ctl->qth_min, ctl->qth_max, ctl->Wlog, ctl->Plog,
- ctl->Scell_log, stab);
-
+ ctl->Scell_log, stab, max_P);
+ red_set_vars(&q->vars);
return 0;
}
@@ -409,6 +414,7 @@ static const struct nla_policy gred_policy[TCA_GRED_MAX + 1] = {
[TCA_GRED_PARMS] = { .len = sizeof(struct tc_gred_qopt) },
[TCA_GRED_STAB] = { .len = 256 },
[TCA_GRED_DPS] = { .len = sizeof(struct tc_gred_sopt) },
+ [TCA_GRED_MAX_P] = { .type = NLA_U32 },
};
static int gred_change(struct Qdisc *sch, struct nlattr *opt)
@@ -418,6 +424,8 @@ static int gred_change(struct Qdisc *sch, struct nlattr *opt)
struct nlattr *tb[TCA_GRED_MAX + 1];
int err, prio = GRED_DEF_PRIO;
u8 *stab;
+ u32 max_P;
+ struct gred_sched_data *prealloc;
if (opt == NULL)
return -EINVAL;
@@ -433,6 +441,8 @@ static int gred_change(struct Qdisc *sch, struct nlattr *opt)
tb[TCA_GRED_STAB] == NULL)
return -EINVAL;
+ max_P = tb[TCA_GRED_MAX_P] ? nla_get_u32(tb[TCA_GRED_MAX_P]) : 0;
+
err = -EINVAL;
ctl = nla_data(tb[TCA_GRED_PARMS]);
stab = nla_data(tb[TCA_GRED_STAB]);
@@ -455,9 +465,10 @@ static int gred_change(struct Qdisc *sch, struct nlattr *opt)
prio = ctl->prio;
}
+ prealloc = kzalloc(sizeof(*prealloc), GFP_KERNEL);
sch_tree_lock(sch);
- err = gred_change_vq(sch, ctl->DP, ctl, prio, stab);
+ err = gred_change_vq(sch, ctl->DP, ctl, prio, stab, max_P, &prealloc);
if (err < 0)
goto errout_locked;
@@ -471,6 +482,7 @@ static int gred_change(struct Qdisc *sch, struct nlattr *opt)
errout_locked:
sch_tree_unlock(sch);
+ kfree(prealloc);
errout:
return err;
}
@@ -498,6 +510,7 @@ static int gred_dump(struct Qdisc *sch, struct sk_buff *skb)
struct gred_sched *table = qdisc_priv(sch);
struct nlattr *parms, *opts = NULL;
int i;
+ u32 max_p[MAX_DPs];
struct tc_gred_sopt sopt = {
.DPs = table->DPs,
.def_DP = table->def,
@@ -509,6 +522,14 @@ static int gred_dump(struct Qdisc *sch, struct sk_buff *skb)
if (opts == NULL)
goto nla_put_failure;
NLA_PUT(skb, TCA_GRED_DPS, sizeof(sopt), &sopt);
+
+ for (i = 0; i < MAX_DPs; i++) {
+ struct gred_sched_data *q = table->tab[i];
+
+ max_p[i] = q ? q->parms.max_P : 0;
+ }
+ NLA_PUT(skb, TCA_GRED_MAX_P, sizeof(max_p), max_p);
+
parms = nla_nest_start(skb, TCA_GRED_PARMS);
if (parms == NULL)
goto nla_put_failure;
@@ -545,12 +566,12 @@ static int gred_dump(struct Qdisc *sch, struct sk_buff *skb)
opt.bytesin = q->bytesin;
if (gred_wred_mode(table)) {
- q->parms.qidlestart =
- table->tab[table->def]->parms.qidlestart;
- q->parms.qavg = table->tab[table->def]->parms.qavg;
+ q->vars.qidlestart =
+ table->tab[table->def]->vars.qidlestart;
+ q->vars.qavg = table->tab[table->def]->vars.qavg;
}
- opt.qave = red_calc_qavg(&q->parms, q->parms.qavg);
+ opt.qave = red_calc_qavg(&q->parms, &q->vars, q->vars.qavg);
append_opt:
if (nla_append(skb, sizeof(opt), &opt) < 0)
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2024-12-22 12:57:58 +0000