diff options
Diffstat (limited to 'net/ipv4/route.c')
-rw-r--r-- | net/ipv4/route.c | 18 |
1 files changed, 9 insertions, 9 deletions
diff --git a/net/ipv4/route.c b/net/ipv4/route.c index cbadb942c332..2d4ae469b471 100644 --- a/net/ipv4/route.c +++ b/net/ipv4/route.c @@ -596,12 +596,12 @@ static struct fib_nh_exception *fnhe_oldest(struct fnhe_hash_bucket *hash) static inline u32 fnhe_hashfun(__be32 daddr) { + static u32 fnhe_hashrnd __read_mostly; u32 hval; - hval = (__force u32) daddr; - hval ^= (hval >> 11) ^ (hval >> 22); - - return hval & (FNHE_HASH_SIZE - 1); + net_get_random_once(&fnhe_hashrnd, sizeof(fnhe_hashrnd)); + hval = jhash_1word((__force u32) daddr, fnhe_hashrnd); + return hash_32(hval, FNHE_HASH_SHIFT); } static void fill_route_from_fnhe(struct rtable *rt, struct fib_nh_exception *fnhe) @@ -628,12 +628,12 @@ static void update_or_create_fnhe(struct fib_nh *nh, __be32 daddr, __be32 gw, spin_lock_bh(&fnhe_lock); - hash = nh->nh_exceptions; + hash = rcu_dereference(nh->nh_exceptions); if (!hash) { hash = kzalloc(FNHE_HASH_SIZE * sizeof(*hash), GFP_ATOMIC); if (!hash) goto out_unlock; - nh->nh_exceptions = hash; + rcu_assign_pointer(nh->nh_exceptions, hash); } hash += hval; @@ -1242,7 +1242,7 @@ static unsigned int ipv4_mtu(const struct dst_entry *dst) static struct fib_nh_exception *find_exception(struct fib_nh *nh, __be32 daddr) { - struct fnhe_hash_bucket *hash = nh->nh_exceptions; + struct fnhe_hash_bucket *hash = rcu_dereference(nh->nh_exceptions); struct fib_nh_exception *fnhe; u32 hval; @@ -1311,7 +1311,7 @@ static bool rt_cache_route(struct fib_nh *nh, struct rtable *rt) if (rt_is_input_route(rt)) { p = (struct rtable **)&nh->nh_rth_input; } else { - p = (struct rtable **)__this_cpu_ptr(nh->nh_pcpu_rth_output); + p = (struct rtable **)raw_cpu_ptr(nh->nh_pcpu_rth_output); } orig = *p; @@ -1939,7 +1939,7 @@ static struct rtable *__mkroute_output(const struct fib_result *res, do_cache = false; goto add; } - prth = __this_cpu_ptr(nh->nh_pcpu_rth_output); + prth = raw_cpu_ptr(nh->nh_pcpu_rth_output); } rth = rcu_dereference(*prth); if (rt_cache_valid(rth)) { |