From fbd8f1379aeeb3e44a59302a6b2850636130bb2a Mon Sep 17 00:00:00 2001 From: Patrick McHardy Date: Sat, 5 Jul 2008 23:22:19 -0700 Subject: [PATCH] net-sched: sch_htb: move hash and sibling list removal to htb_delete Hash list removal currently happens twice (once in htb_delete, once in htb_destroy_class), which makes it harder to use the dynamically sized class hash without adding special cases for HTB. The reason is that qdisc destruction destroys classes in hierarchical order, which is not necessary if filters are destroyed in a separate iteration during qdisc destruction. Adjust qdisc destruction to follow the same scheme as other hierarchical qdiscs by first performing a filter destruction pass, then destroying all classes in hash order. Signed-off-by: Patrick McHardy Signed-off-by: David S. Miller --- net/sched/sch_htb.c | 40 +++++++++++++++++----------------------- 1 file changed, 17 insertions(+), 23 deletions(-) diff --git a/net/sched/sch_htb.c b/net/sched/sch_htb.c index 0284791169c9..d01fe3a1a623 100644 --- a/net/sched/sch_htb.c +++ b/net/sched/sch_htb.c @@ -1226,8 +1226,6 @@ static void htb_parent_to_leaf(struct htb_sched *q, struct htb_class *cl, static void htb_destroy_class(struct Qdisc *sch, struct htb_class *cl) { - struct htb_sched *q = qdisc_priv(sch); - if (!cl->level) { BUG_TRAP(cl->un.leaf.q); qdisc_destroy(cl->un.leaf.q); @@ -1237,21 +1235,6 @@ static void htb_destroy_class(struct Qdisc *sch, struct htb_class *cl) qdisc_put_rtab(cl->ceil); tcf_destroy_chain(&cl->filter_list); - - while (!list_empty(&cl->children)) - htb_destroy_class(sch, list_entry(cl->children.next, - struct htb_class, sibling)); - - /* note: this delete may happen twice (see htb_delete) */ - hlist_del_init(&cl->hlist); - list_del(&cl->sibling); - - if (cl->prio_activity) - htb_deactivate(q, cl); - - if (cl->cmode != HTB_CAN_SEND) - htb_safe_rb_erase(&cl->pq_node, q->wait_pq + cl->level); - kfree(cl); } @@ -1259,6 +1242,9 @@ static void htb_destroy_class(struct Qdisc *sch, struct htb_class *cl) static void htb_destroy(struct Qdisc *sch) { struct htb_sched *q = qdisc_priv(sch); + struct hlist_node *n, *next; + struct htb_class *cl; + unsigned int i; qdisc_watchdog_cancel(&q->watchdog); /* This line used to be after htb_destroy_class call below @@ -1267,10 +1253,14 @@ static void htb_destroy(struct Qdisc *sch) unbind_filter on it (without Oops). */ tcf_destroy_chain(&q->filter_list); - while (!list_empty(&q->root)) - htb_destroy_class(sch, list_entry(q->root.next, - struct htb_class, sibling)); - + for (i = 0; i < HTB_HSIZE; i++) { + hlist_for_each_entry(cl, n, q->hash + i, hlist) + tcf_destroy_chain(&cl->filter_list); + } + for (i = 0; i < HTB_HSIZE; i++) { + hlist_for_each_entry_safe(cl, n, next, q->hash + i, hlist) + htb_destroy_class(sch, cl); + } __skb_queue_purge(&q->direct_queue); } @@ -1302,12 +1292,16 @@ static int htb_delete(struct Qdisc *sch, unsigned long arg) qdisc_tree_decrease_qlen(cl->un.leaf.q, qlen); } - /* delete from hash and active; remainder in destroy_class */ - hlist_del_init(&cl->hlist); + /* delete from hash, sibling list and active */ + hlist_del(&cl->hlist); + list_del(&cl->sibling); if (cl->prio_activity) htb_deactivate(q, cl); + if (cl->cmode != HTB_CAN_SEND) + htb_safe_rb_erase(&cl->pq_node, q->wait_pq + cl->level); + if (last_child) htb_parent_to_leaf(q, cl, new_q); -- 2.20.1