net/sched/sch_htb.c

154 	/* filters for qdisc itself */
213  * filters in qdisc and in inner nodes (if higher filter points to the inner
888 		 * qdisc drops packets in enqueue routine or if someone used
1035 	struct Qdisc *sch = q->watchdog.qdisc;
1085 			NL_SET_ERR_MSG(extack, "HTB must be the root qdisc to use offload");
1120 		struct Qdisc *qdisc;
1122 		qdisc = qdisc_create_dflt(dev_queue, &pfifo_qdisc_ops,
1124 		if (!qdisc) {
1128 		q->direct_qdiscs[ntx] = qdisc;
1129 		qdisc->flags |= TCQ_F_ONETXQUEUE | TCQ_F_NOPARENT;
1159 		struct Qdisc *old, *qdisc = q->direct_qdiscs[ntx];
1161 		old = dev_graft_qdisc(qdisc->dev_queue, qdisc);
1163 		qdisc_hash_add(qdisc, false);
1214 	/* Its safe to not acquire qdisc lock. As we hold RTNL,
1215 	 * no change can happen on the qdisc parameters.
1248 	/* Its safe to not acquire qdisc lock. As we hold RTNL,
1419 		struct Qdisc *qdisc;
1423 		qdisc = dev_graft_qdisc(queue_old, NULL);
1424 		WARN_ON(qdisc != cl_old->leaf.q);
1432 		struct Qdisc *qdisc;
1434 		qdisc = dev_graft_qdisc(queue_new, cl_old->leaf.q);
1437 		WARN_ON(!(qdisc->flags & TCQ_F_BUILTIN));
1463 		/* One ref for cl->leaf.q, the other for dev_queue->qdisc. */
1531 	/* One ref for cl->leaf.q, the other for dev_queue->qdisc. */
1553 	/* When destroying, caller qdisc_graft grafts the new qdisc and invokes
1554 	 * qdisc_put for the qdisc being destroyed. htb_destroy_class_offload
1555 	 * does not need to graft or qdisc_put the qdisc being destroyed.
1559 		/* Last qdisc grafted should be the same as cl->leaf.q when
1881 		/* create leaf qdisc early because it uses kmalloc(GFP_KERNEL)
1938 			/* One ref for cl->leaf.q, the other for dev_queue->qdisc. */
1963 		/* leaf (we) needs elementary qdisc */