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Diffstat (limited to 'net/sched/sch_drr.c')
-rw-r--r--net/sched/sch_drr.c60
1 files changed, 28 insertions, 32 deletions
diff --git a/net/sched/sch_drr.c b/net/sched/sch_drr.c
index 07a2b0b35495..9b6d79bd8737 100644
--- a/net/sched/sch_drr.c
+++ b/net/sched/sch_drr.c
@@ -17,9 +17,8 @@
struct drr_class {
struct Qdisc_class_common common;
- unsigned int filter_cnt;
- struct gnet_stats_basic_packed bstats;
+ struct gnet_stats_basic_sync bstats;
struct gnet_stats_queue qstats;
struct net_rate_estimator __rcu *rate_est;
struct list_head alist;
@@ -36,6 +35,11 @@ struct drr_sched {
struct Qdisc_class_hash clhash;
};
+static bool cl_is_active(struct drr_class *cl)
+{
+ return !list_empty(&cl->alist);
+}
+
static struct drr_class *drr_find_class(struct Qdisc *sch, u32 classid)
{
struct drr_sched *q = qdisc_priv(sch);
@@ -85,8 +89,7 @@ static int drr_change_class(struct Qdisc *sch, u32 classid, u32 parentid,
if (tca[TCA_RATE]) {
err = gen_replace_estimator(&cl->bstats, NULL,
&cl->rate_est,
- NULL,
- qdisc_root_sleeping_running(sch),
+ NULL, true,
tca[TCA_RATE]);
if (err) {
NL_SET_ERR_MSG(extack, "Failed to replace estimator");
@@ -106,6 +109,8 @@ static int drr_change_class(struct Qdisc *sch, u32 classid, u32 parentid,
if (cl == NULL)
return -ENOBUFS;
+ gnet_stats_basic_sync_init(&cl->bstats);
+ INIT_LIST_HEAD(&cl->alist);
cl->common.classid = classid;
cl->quantum = quantum;
cl->qdisc = qdisc_create_dflt(sch->dev_queue,
@@ -118,9 +123,7 @@ static int drr_change_class(struct Qdisc *sch, u32 classid, u32 parentid,
if (tca[TCA_RATE]) {
err = gen_replace_estimator(&cl->bstats, NULL, &cl->rate_est,
- NULL,
- qdisc_root_sleeping_running(sch),
- tca[TCA_RATE]);
+ NULL, true, tca[TCA_RATE]);
if (err) {
NL_SET_ERR_MSG(extack, "Failed to replace estimator");
qdisc_put(cl->qdisc);
@@ -146,13 +149,16 @@ static void drr_destroy_class(struct Qdisc *sch, struct drr_class *cl)
kfree(cl);
}
-static int drr_delete_class(struct Qdisc *sch, unsigned long arg)
+static int drr_delete_class(struct Qdisc *sch, unsigned long arg,
+ struct netlink_ext_ack *extack)
{
struct drr_sched *q = qdisc_priv(sch);
struct drr_class *cl = (struct drr_class *)arg;
- if (cl->filter_cnt > 0)
+ if (qdisc_class_in_use(&cl->common)) {
+ NL_SET_ERR_MSG(extack, "DRR class is in use");
return -EBUSY;
+ }
sch_tree_lock(sch);
@@ -188,8 +194,8 @@ static unsigned long drr_bind_tcf(struct Qdisc *sch, unsigned long parent,
{
struct drr_class *cl = drr_find_class(sch, classid);
- if (cl != NULL)
- cl->filter_cnt++;
+ if (cl)
+ qdisc_class_get(&cl->common);
return (unsigned long)cl;
}
@@ -198,7 +204,7 @@ static void drr_unbind_tcf(struct Qdisc *sch, unsigned long arg)
{
struct drr_class *cl = (struct drr_class *)arg;
- cl->filter_cnt--;
+ qdisc_class_put(&cl->common);
}
static int drr_graft_class(struct Qdisc *sch, unsigned long arg,
@@ -229,7 +235,7 @@ static void drr_qlen_notify(struct Qdisc *csh, unsigned long arg)
{
struct drr_class *cl = (struct drr_class *)arg;
- list_del(&cl->alist);
+ list_del_init(&cl->alist);
}
static int drr_dump_class(struct Qdisc *sch, unsigned long arg,
@@ -266,8 +272,7 @@ static int drr_dump_class_stats(struct Qdisc *sch, unsigned long arg,
if (qlen)
xstats.deficit = cl->deficit;
- if (gnet_stats_copy_basic(qdisc_root_sleeping_running(sch),
- d, NULL, &cl->bstats) < 0 ||
+ if (gnet_stats_copy_basic(d, NULL, &cl->bstats, true) < 0 ||
gnet_stats_copy_rate_est(d, &cl->rate_est) < 0 ||
gnet_stats_copy_queue(d, cl_q->cpu_qstats, &cl_q->qstats, qlen) < 0)
return -1;
@@ -286,15 +291,8 @@ static void drr_walk(struct Qdisc *sch, struct qdisc_walker *arg)
for (i = 0; i < q->clhash.hashsize; i++) {
hlist_for_each_entry(cl, &q->clhash.hash[i], common.hnode) {
- if (arg->count < arg->skip) {
- arg->count++;
- continue;
- }
- if (arg->fn(sch, (unsigned long)cl, arg) < 0) {
- arg->stop = 1;
+ if (!tc_qdisc_stats_dump(sch, (unsigned long)cl, arg))
return;
- }
- arg->count++;
}
}
}
@@ -316,7 +314,7 @@ static struct drr_class *drr_classify(struct sk_buff *skb, struct Qdisc *sch,
*qerr = NET_XMIT_SUCCESS | __NET_XMIT_BYPASS;
fl = rcu_dereference_bh(q->filter_list);
- result = tcf_classify(skb, fl, &res, false);
+ result = tcf_classify(skb, NULL, fl, &res, false);
if (result >= 0) {
#ifdef CONFIG_NET_CLS_ACT
switch (result) {
@@ -324,7 +322,7 @@ static struct drr_class *drr_classify(struct sk_buff *skb, struct Qdisc *sch,
case TC_ACT_STOLEN:
case TC_ACT_TRAP:
*qerr = NET_XMIT_SUCCESS | __NET_XMIT_STOLEN;
- /* fall through */
+ fallthrough;
case TC_ACT_SHOT:
return NULL;
}
@@ -344,7 +342,6 @@ static int drr_enqueue(struct sk_buff *skb, struct Qdisc *sch,
struct drr_sched *q = qdisc_priv(sch);
struct drr_class *cl;
int err = 0;
- bool first;
cl = drr_classify(skb, sch, &err);
if (cl == NULL) {
@@ -354,7 +351,6 @@ static int drr_enqueue(struct sk_buff *skb, struct Qdisc *sch,
return err;
}
- first = !cl->qdisc->q.qlen;
err = qdisc_enqueue(skb, cl->qdisc, to_free);
if (unlikely(err != NET_XMIT_SUCCESS)) {
if (net_xmit_drop_count(err)) {
@@ -364,7 +360,7 @@ static int drr_enqueue(struct sk_buff *skb, struct Qdisc *sch,
return err;
}
- if (first) {
+ if (!cl_is_active(cl)) {
list_add_tail(&cl->alist, &q->active);
cl->deficit = cl->quantum;
}
@@ -398,7 +394,7 @@ static struct sk_buff *drr_dequeue(struct Qdisc *sch)
if (unlikely(skb == NULL))
goto out;
if (cl->qdisc->q.qlen == 0)
- list_del(&cl->alist);
+ list_del_init(&cl->alist);
bstats_update(&cl->bstats, skb);
qdisc_bstats_update(sch, skb);
@@ -439,12 +435,10 @@ static void drr_reset_qdisc(struct Qdisc *sch)
for (i = 0; i < q->clhash.hashsize; i++) {
hlist_for_each_entry(cl, &q->clhash.hash[i], common.hnode) {
if (cl->qdisc->q.qlen)
- list_del(&cl->alist);
+ list_del_init(&cl->alist);
qdisc_reset(cl->qdisc);
}
}
- sch->qstats.backlog = 0;
- sch->q.qlen = 0;
}
static void drr_destroy_qdisc(struct Qdisc *sch)
@@ -491,6 +485,7 @@ static struct Qdisc_ops drr_qdisc_ops __read_mostly = {
.destroy = drr_destroy_qdisc,
.owner = THIS_MODULE,
};
+MODULE_ALIAS_NET_SCH("drr");
static int __init drr_init(void)
{
@@ -505,3 +500,4 @@ static void __exit drr_exit(void)
module_init(drr_init);
module_exit(drr_exit);
MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Deficit Round Robin scheduler");
generated by cgit (git 2.34.1) at 2025-12-26 01:13:54 +0000