diff options
Diffstat (limited to 'net/ipv6/route.c')
| -rw-r--r-- | net/ipv6/route.c | 21 |
1 files changed, 15 insertions, 6 deletions
diff --git a/net/ipv6/route.c b/net/ipv6/route.c index 79078747a64..8a777932786 100644 --- a/net/ipv6/route.c +++ b/net/ipv6/route.c @@ -280,10 +280,13 @@ static int inline rt6_check_neigh(struct rt6_info *rt) { struct neighbour *neigh = rt->rt6i_nexthop; int m = 0; - if (neigh) { + if (rt->rt6i_flags & RTF_NONEXTHOP || + !(rt->rt6i_flags & RTF_GATEWAY)) + m = 1; + else if (neigh) { read_lock_bh(&neigh->lock); if (neigh->nud_state & NUD_VALID) - m = 1; + m = 2; read_unlock_bh(&neigh->lock); } return m; @@ -292,15 +295,18 @@ static int inline rt6_check_neigh(struct rt6_info *rt) static int rt6_score_route(struct rt6_info *rt, int oif, int strict) { - int m = rt6_check_dev(rt, oif); + int m, n; + + m = rt6_check_dev(rt, oif); if (!m && (strict & RT6_SELECT_F_IFACE)) return -1; #ifdef CONFIG_IPV6_ROUTER_PREF m |= IPV6_DECODE_PREF(IPV6_EXTRACT_PREF(rt->rt6i_flags)) << 2; #endif - if (rt6_check_neigh(rt)) + n = rt6_check_neigh(rt); + if (n > 1) m |= 16; - else if (strict & RT6_SELECT_F_REACHABLE) + else if (!n && strict & RT6_SELECT_F_REACHABLE) return -1; return m; } @@ -317,7 +323,7 @@ static struct rt6_info *rt6_select(struct rt6_info **head, int oif, __FUNCTION__, head, head ? *head : NULL, oif); for (rt = rt0, metric = rt0->rt6i_metric; - rt && rt->rt6i_metric == metric; + rt && rt->rt6i_metric == metric && (!last || rt != rt0); rt = rt->u.next) { int m; @@ -343,9 +349,12 @@ static struct rt6_info *rt6_select(struct rt6_info **head, int oif, (strict & RT6_SELECT_F_REACHABLE) && last && last != rt0) { /* no entries matched; do round-robin */ + static spinlock_t lock = SPIN_LOCK_UNLOCKED; + spin_lock(&lock); *head = rt0->u.next; rt0->u.next = last->u.next; last->u.next = rt0; + spin_unlock(&lock); } RT6_TRACE("%s() => %p, score=%d\n", |