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authorEric Dumazet <eric.dumazet@gmail.com>2010-10-04 06:15:44 +0000
committerDavid S. Miller <davem@davemloft.net>2010-10-05 14:54:36 -0700
commitd6bf781712a1d25cc8987036b3a48535b331eb91 (patch)
treecf83ab68ef2519576578d8336a43cc13cd375cde /net/ipv6/ndisc.c
parent110b2499370c401cdcc7c63e481084467291d556 (diff)
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 <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6/ndisc.c')
-rw-r--r--net/ipv6/ndisc.c10
1 files changed, 7 insertions, 3 deletions
diff --git a/net/ipv6/ndisc.c b/net/ipv6/ndisc.c
index b3dd844cd34f..998d6d27e7cf 100644
--- a/net/ipv6/ndisc.c
+++ b/net/ipv6/ndisc.c
@@ -91,7 +91,9 @@
#include <linux/netfilter.h>
#include <linux/netfilter_ipv6.h>
-static u32 ndisc_hash(const void *pkey, const struct net_device *dev);
+static u32 ndisc_hash(const void *pkey,
+ const struct net_device *dev,
+ __u32 rnd);
static int ndisc_constructor(struct neighbour *neigh);
static void ndisc_solicit(struct neighbour *neigh, struct sk_buff *skb);
static void ndisc_error_report(struct neighbour *neigh, struct sk_buff *skb);
@@ -350,7 +352,9 @@ int ndisc_mc_map(struct in6_addr *addr, char *buf, struct net_device *dev, int d
EXPORT_SYMBOL(ndisc_mc_map);
-static u32 ndisc_hash(const void *pkey, const struct net_device *dev)
+static u32 ndisc_hash(const void *pkey,
+ const struct net_device *dev,
+ __u32 hash_rnd)
{
const u32 *p32 = pkey;
u32 addr_hash, i;
@@ -359,7 +363,7 @@ static u32 ndisc_hash(const void *pkey, const struct net_device *dev)
for (i = 0; i < (sizeof(struct in6_addr) / sizeof(u32)); i++)
addr_hash ^= *p32++;
- return jhash_2words(addr_hash, dev->ifindex, nd_tbl.hash_rnd);
+ return jhash_2words(addr_hash, dev->ifindex, hash_rnd);
}
static int ndisc_constructor(struct neighbour *neigh)