Thu, Dec 01, 2016 at 02:41:59AM CET, sfr@xxxxxxxxxxxxxxxx wrote:
>Hi all,
>
>Today's linux-next merge of the net-next tree got a conflict in:
>
> net/sched/cls_flower.c
>
>between commit:
>
> 725cbb62e7ad ("sched: cls_flower: remove from hashtable only in case skip sw flag is not set")
>
>from the net tree and commit:
>
> 13fa876ebd03 ("net/sched: cls_flower: merge filter delete/destroy common code")
>
>from the net-next tree.
>
>I fixed it up (see below) and can carry the fix as necessary. This
>is now fixed as far as linux-next is concerned, but any non trivial
>conflicts should be mentioned to your upstream maintainer when your tree
>is submitted for merging. You may also want to consider cooperating
>with the maintainer of the conflicting tree to minimise any particularly
>complex conflicts.
Looks fine to me. Thanks.
>
>--
>Cheers,
>Stephen Rothwell
>
>diff --cc net/sched/cls_flower.c
>index 904442421db3,e8dd09af0d0c..000000000000
>--- a/net/sched/cls_flower.c
>+++ b/net/sched/cls_flower.c
>@@@ -273,24 -272,14 +276,32 @@@ static void fl_hw_update_stats(struct t
> dev->netdev_ops->ndo_setup_tc(dev, tp->q->handle, tp->protocol, &tc);
> }
>
> +static void fl_destroy_sleepable(struct work_struct *work)
> +{
> + struct cls_fl_head *head = container_of(work, struct cls_fl_head,
> + work);
> + if (head->mask_assigned)
> + rhashtable_destroy(&head->ht);
> + kfree(head);
> + module_put(THIS_MODULE);
> +}
> +
> +static void fl_destroy_rcu(struct rcu_head *rcu)
> +{
> + struct cls_fl_head *head = container_of(rcu, struct cls_fl_head, rcu);
> +
> + INIT_WORK(&head->work, fl_destroy_sleepable);
> + schedule_work(&head->work);
> +}
> +
>+ static void __fl_delete(struct tcf_proto *tp, struct cls_fl_filter *f)
>+ {
>+ list_del_rcu(&f->list);
>+ fl_hw_destroy_filter(tp, (unsigned long)f);
>+ tcf_unbind_filter(tp, &f->res);
>+ call_rcu(&f->rcu, fl_destroy_filter);
>+ }
>+
> static bool fl_destroy(struct tcf_proto *tp, bool force)
> {
> struct cls_fl_head *head = rtnl_dereference(tp->root);
>@@@ -299,14 -288,12 +310,11 @@@
> if (!force && !list_empty(&head->filters))
> return false;
>
>- list_for_each_entry_safe(f, next, &head->filters, list) {
>- fl_hw_destroy_filter(tp, (unsigned long)f);
>- list_del_rcu(&f->list);
>- call_rcu(&f->rcu, fl_destroy_filter);
>- }
>+ list_for_each_entry_safe(f, next, &head->filters, list)
>+ __fl_delete(tp, f);
> - RCU_INIT_POINTER(tp->root, NULL);
> - if (head->mask_assigned)
> - rhashtable_destroy(&head->ht);
> - kfree_rcu(head, rcu);
> +
> + __module_get(THIS_MODULE);
> + call_rcu(&head->rcu, fl_destroy_rcu);
> return true;
> }
>
>@@@ -761,13 -782,9 +804,10 @@@ static int fl_delete(struct tcf_proto *
> struct cls_fl_head *head = rtnl_dereference(tp->root);
> struct cls_fl_filter *f = (struct cls_fl_filter *) arg;
>
> - rhashtable_remove_fast(&head->ht, &f->ht_node,
> - head->ht_params);
> + if (!tc_skip_sw(f->flags))
> + rhashtable_remove_fast(&head->ht, &f->ht_node,
> + head->ht_params);
>- list_del_rcu(&f->list);
>- fl_hw_destroy_filter(tp, (unsigned long)f);
>- tcf_unbind_filter(tp, &f->res);
>- call_rcu(&f->rcu, fl_destroy_filter);
>+ __fl_delete(tp, f);
> return 0;
> }
>
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