Author: kp
Date: Tue Dec 1 16:34:43 2020
New Revision: 368238
URL: https://svnweb.freebsd.org/changeset/base/368238
Log:
net: Revert vnet/epair cleanup race mitigation
Revert the mitigation code for the vnet/epair cleanup race (done in r365457).
r368237 introduced a more reliable fix.
MFC after: 2 weeks
Sponsored by: Modirum MDPay
Modified:
head/sys/net/if.c
head/sys/net/if_epair.c
Modified: head/sys/net/if.c
==============================================================================
--- head/sys/net/if.c Tue Dec 1 16:23:59 2020 (r368237)
+++ head/sys/net/if.c Tue Dec 1 16:34:43 2020 (r368238)
@@ -1338,11 +1338,6 @@ if_vmove(struct ifnet *ifp, struct vnet *new_vnet)
ifindex_free_locked(ifp->if_index);
IFNET_WUNLOCK();
-
- /* Don't re-attach DYING interfaces. */
- if (ifp->if_flags & IFF_DYING)
- return (0);
-
/*
* Perform interface-specific reassignment tasks, if provided by
* the driver.
Modified: head/sys/net/if_epair.c
==============================================================================
--- head/sys/net/if_epair.c Tue Dec 1 16:23:59 2020 (r368237)
+++ head/sys/net/if_epair.c Tue Dec 1 16:34:43 2020 (r368238)
@@ -611,14 +611,8 @@ epair_qflush(struct ifnet *ifp)
struct epair_softc *sc;
sc = ifp->if_softc;
-
- /*
- * See epair_clone_destroy(), we can end up getting called twice.
- * Don't do anything on the second call.
- */
- if (sc == NULL)
- return;
-
+ KASSERT(sc != NULL, ("%s: ifp=%p, epair_softc gone? sc=%p\n",
+ __func__, ifp, sc));
/*
* Remove this ifp from all backpointer lists. The interface will not
* usable for flushing anyway nor should it have anything to flush
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