D45690.1775644514.diff
No OneTemporary
Actions

Size

1 KB

Referenced Files

None

Subscribers

None

D45690.1775644514.diff
View Options

	diff --git a/sys/net/if.c b/sys/net/if.c
	--- a/sys/net/if.c
	+++ b/sys/net/if.c
	@@ -1235,6 +1235,22 @@
	#ifdef VIMAGE
	finish_vnet_shutdown:
	#endif
	+ /*
	+ * Objects associated with this ifnet have been deregistered from
	+ * tables/lists here, but other threads may still reference the
	+ * objects (e.g. nhop_objects). We need to clear ifp->if_afdata[]
	+ * after the refereces are finished because other threads may access
	+ * the contents of ifp->if_afdata[] in such references
	+ * (in6_selecthlim() for example).
	+ * Those references are (and should be) guarded by the net_epoch
	+ * so we can wait for the end of the reference with
	+ * epoch_wait_preempt() and NET_EPOCH_DRAIN_CALLBACKS().
	+ * After these calls, objects assosiated with this ifnet are
	+ * not kept referenced or will not be fetched because they are
	+ * deregistered from tables/lists.
	+ */
	+ NET_EPOCH_WAIT();
	+ NET_EPOCH_DRAIN_CALLBACKS();
	/*
	* We cannot hold the lock over dom_ifdetach calls as they might
	* sleep, for example trying to drain a callout, thus open up the