From d6bf781712a1d25cc8987036b3a48535b331eb91 Mon Sep 17 00:00:00 2001 From: Eric Dumazet Date: Mon, 4 Oct 2010 06:15:44 +0000 Subject: net neigh: RCU conversion of neigh hash table David This is the first step for RCU conversion of neigh code. Next patches will convert hash_buckets[] and "struct neighbour" to RCU protected objects. Thanks [PATCH net-next] net neigh: RCU conversion of neigh hash table Instead of storing hash_buckets, hash_mask and hash_rnd in "struct neigh_table", a new structure is defined : struct neigh_hash_table { struct neighbour **hash_buckets; unsigned int hash_mask; __u32 hash_rnd; struct rcu_head rcu; }; And "struct neigh_table" has an RCU protected pointer to such a neigh_hash_table. This means the signature of (*hash)() function changed: We need to add a third parameter with the actual hash_rnd value, since this is not anymore a neigh_table field. Signed-off-by: Eric Dumazet Signed-off-by: David S. Miller --- net/decnet/dn_neigh.c | 13 +++++++------ 1 file changed, 7 insertions(+), 6 deletions(-) (limited to 'net/decnet') diff --git a/net/decnet/dn_neigh.c b/net/decnet/dn_neigh.c index 0363bb95cc7..a085dbcf5c7 100644 --- a/net/decnet/dn_neigh.c +++ b/net/decnet/dn_neigh.c @@ -48,7 +48,6 @@ #include #include -static u32 dn_neigh_hash(const void *pkey, const struct net_device *dev); static int dn_neigh_construct(struct neighbour *); static void dn_long_error_report(struct neighbour *, struct sk_buff *); static void dn_short_error_report(struct neighbour *, struct sk_buff *); @@ -93,6 +92,13 @@ static const struct neigh_ops dn_phase3_ops = { .queue_xmit = dev_queue_xmit }; +static u32 dn_neigh_hash(const void *pkey, + const struct net_device *dev, + __u32 hash_rnd) +{ + return jhash_2words(*(__u16 *)pkey, 0, hash_rnd); +} + struct neigh_table dn_neigh_table = { .family = PF_DECnet, .entry_size = sizeof(struct dn_neigh), @@ -122,11 +128,6 @@ struct neigh_table dn_neigh_table = { .gc_thresh3 = 1024, }; -static u32 dn_neigh_hash(const void *pkey, const struct net_device *dev) -{ - return jhash_2words(*(__u16 *)pkey, 0, dn_neigh_table.hash_rnd); -} - static int dn_neigh_construct(struct neighbour *neigh) { struct net_device *dev = neigh->dev; -- cgit v1.2.3