mirror of
https://github.com/freebsd/freebsd-src
synced 2024-07-21 18:27:22 +00:00
vnet: (read) lock the vnet list while iterating it
Ensure that the vnet list cannot be modified while we're running through it. Reviewed by: mjg (previous version), zlei (previous version) MFC after: 1 week Sponsored by: Rubicon Communications, LLC ("Netgate") Differential Revision: https://reviews.freebsd.org/D42927
This commit is contained in:
parent
3878bbf1bb
commit
bd7b2f9501
|
@ -536,11 +536,13 @@ vnet_register_sysinit(void *arg)
|
|||
* Invoke the constructor on all the existing vnets when it is
|
||||
* registered.
|
||||
*/
|
||||
VNET_LIST_RLOCK();
|
||||
VNET_FOREACH(vnet) {
|
||||
CURVNET_SET_QUIET(vnet);
|
||||
vs->func(vs->arg);
|
||||
CURVNET_RESTORE();
|
||||
}
|
||||
VNET_LIST_RUNLOCK();
|
||||
VNET_SYSINIT_WUNLOCK();
|
||||
}
|
||||
|
||||
|
@ -592,6 +594,7 @@ vnet_deregister_sysuninit(void *arg)
|
|||
* deregistered.
|
||||
*/
|
||||
VNET_SYSINIT_WLOCK();
|
||||
VNET_LIST_RLOCK();
|
||||
VNET_FOREACH(vnet) {
|
||||
CURVNET_SET_QUIET(vnet);
|
||||
vs->func(vs->arg);
|
||||
|
@ -601,6 +604,7 @@ vnet_deregister_sysuninit(void *arg)
|
|||
/* Remove the destructor from the global list of vnet destructors. */
|
||||
TAILQ_REMOVE(&vnet_destructors, vs, link);
|
||||
VNET_SYSINIT_WUNLOCK();
|
||||
VNET_LIST_RUNLOCK();
|
||||
}
|
||||
|
||||
/*
|
||||
|
|
|
@ -661,11 +661,13 @@ ipreass_drain(void)
|
|||
{
|
||||
VNET_ITERATOR_DECL(vnet_iter);
|
||||
|
||||
VNET_LIST_RLOCK();
|
||||
VNET_FOREACH(vnet_iter) {
|
||||
CURVNET_SET(vnet_iter);
|
||||
ipreass_drain_vnet();
|
||||
CURVNET_RESTORE();
|
||||
}
|
||||
VNET_LIST_RUNLOCK();
|
||||
}
|
||||
|
||||
|
||||
|
|
Loading…
Reference in a new issue