diff options
Diffstat (limited to 'sys/net/route.c')
| -rw-r--r-- | sys/net/route.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/sys/net/route.c b/sys/net/route.c index 78cf49d..d407b6d 100644 --- a/sys/net/route.c +++ b/sys/net/route.c @@ -1025,6 +1025,7 @@ rt_setgate(struct rtentry *rt, struct sockaddr *dst, struct sockaddr *gate) struct radix_node_head *rnh = rt_tables[dst->sa_family]; int dlen = SA_SIZE(dst), glen = SA_SIZE(gate); +again: RT_LOCK_ASSERT(rt); /* @@ -1057,7 +1058,15 @@ rt_setgate(struct rtentry *rt, struct sockaddr *dst, struct sockaddr *gate) RT_REMREF(rt); return (EADDRINUSE); /* failure */ } - RT_LOCK(rt); + /* + * Try to reacquire the lock on rt, and if it fails, + * clean state and restart from scratch. + */ + if (!RT_TRYLOCK(rt)) { + RTFREE_LOCKED(gwrt); + RT_LOCK(rt); + goto again; + } /* * If there is already a gwroute, then drop it. If we * are asked to replace route with itself, then do |
