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hc
2024-09-20 cf4ce59b3b70238352c7f1729f0f7223214828ad 
 kernel/net/sched/sch_cbs.c
....@@ -1,13 +1,8 @@
1
+// SPDX-License-Identifier: GPL-2.0-or-later
12 /*
23  * net/sched/sch_cbs.c	Credit Based Shaper
34  *
4
- *		This program is free software; you can redistribute it and/or
5
- *		modify it under the terms of the GNU General Public License
6
- *		as published by the Free Software Foundation; either version
7
- *		2 of the License, or (at your option) any later version.
8
- *
95  * Authors:	Vinicius Costa Gomes <vinicius.gomes@intel.com>
10
- *
116  */
127 
138 /* Credit Based Shaper (CBS)
....@@ -93,13 +88,14 @@
9388 			     struct Qdisc *child,
9489 			     struct sk_buff **to_free)
9590 {
91
+	unsigned int len = qdisc_pkt_len(skb);
9692 	int err;
9793 
9894 	err = child->ops->enqueue(skb, child, to_free);
9995 	if (err != NET_XMIT_SUCCESS)
10096 		return err;
10197 
102
-	qdisc_qstats_backlog_inc(sch, skb);
98
+	sch->qstats.backlog += len;
10399 	sch->q.qlen++;
104100 
105101 	return NET_XMIT_SUCCESS;
....@@ -313,7 +309,7 @@
313309 {
314310 	struct ethtool_link_ksettings ecmd;
315311 	int speed = SPEED_10;
316
-	int port_rate = -1;
312
+	int port_rate;
317313 	int err;
318314 
319315 	err = __ethtool_get_link_ksettings(dev, &ecmd);
....@@ -370,7 +366,8 @@
370366 	struct tc_cbs_qopt *qopt;
371367 	int err;
372368 
373
-	err = nla_parse_nested(tb, TCA_CBS_MAX, opt, cbs_policy, extack);
369
+	err = nla_parse_nested_deprecated(tb, TCA_CBS_MAX, opt, cbs_policy,
370
+					  extack);
374371 	if (err < 0)
375372 		return err;
376373 
....@@ -405,7 +402,6 @@
405402 {
406403 	struct cbs_sched_data *q = qdisc_priv(sch);
407404 	struct net_device *dev = qdisc_dev(sch);
408
-	int err;
409405 
410406 	if (!opt) {
411407 		NL_SET_ERR_MSG(extack, "Missing CBS qdisc options  which are mandatory");
....@@ -417,6 +413,10 @@
417413 	if (!q->qdisc)
418414 		return -ENOMEM;
419415 
416
+	spin_lock(&cbs_list_lock);
417
+	list_add(&q->cbs_list, &cbs_list);
418
+	spin_unlock(&cbs_list_lock);
419
+
420420 	qdisc_hash_add(q->qdisc, false);
421421 
422422 	q->queue = sch->dev_queue - netdev_get_tx_queue(dev, 0);
....@@ -426,17 +426,7 @@
426426 
427427 	qdisc_watchdog_init(&q->watchdog, sch);
428428 
429
-	err = cbs_change(sch, opt, extack);
430
-	if (err)
431
-		return err;
432
-
433
-	if (!q->offload) {
434
-		spin_lock(&cbs_list_lock);
435
-		list_add(&q->cbs_list, &cbs_list);
436
-		spin_unlock(&cbs_list_lock);
437
-	}
438
-
439
-	return 0;
429
+	return cbs_change(sch, opt, extack);
440430 }
441431 
442432 static void cbs_destroy(struct Qdisc *sch)
....@@ -444,15 +434,18 @@
444434 	struct cbs_sched_data *q = qdisc_priv(sch);
445435 	struct net_device *dev = qdisc_dev(sch);
446436 
447
-	spin_lock(&cbs_list_lock);
448
-	list_del(&q->cbs_list);
449
-	spin_unlock(&cbs_list_lock);
437
+	/* Nothing to do if we couldn't create the underlying qdisc */
438
+	if (!q->qdisc)
439
+		return;
450440 
451441 	qdisc_watchdog_cancel(&q->watchdog);
452442 	cbs_disable_offload(dev, q);
453443 
454
-	if (q->qdisc)
455
-		qdisc_put(q->qdisc);
444
+	spin_lock(&cbs_list_lock);
445
+	list_del(&q->cbs_list);
446
+	spin_unlock(&cbs_list_lock);
447
+
448
+	qdisc_put(q->qdisc);
456449 }
457450 
458451 static int cbs_dump(struct Qdisc *sch, struct sk_buff *skb)
....@@ -461,7 +454,7 @@
461454 	struct tc_cbs_qopt opt = { };
462455 	struct nlattr *nest;
463456 
464
-	nest = nla_nest_start(skb, TCA_OPTIONS);
457
+	nest = nla_nest_start_noflag(skb, TCA_OPTIONS);
465458 	if (!nest)
466459 		goto nla_put_failure;
467460