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| author | Eric Dumazet <eric.dumazet@gmail.com> | 2010-10-04 06:15:44 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-10-05 14:54:36 -0700 |
| commit | d6bf781712a1d25cc8987036b3a48535b331eb91 (patch) | |
| tree | cf83ab68ef2519576578d8336a43cc13cd375cde /net/decnet | |
| parent | 110b2499370c401cdcc7c63e481084467291d556 (diff) | |
| download | lwn-d6bf781712a1d25cc8987036b3a48535b331eb91.tar.gz lwn-d6bf781712a1d25cc8987036b3a48535b331eb91.zip | |
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/decnet')
| -rw-r--r-- | net/decnet/dn_neigh.c | 13 |
1 files changed, 7 insertions, 6 deletions
diff --git a/net/decnet/dn_neigh.c b/net/decnet/dn_neigh.c index 0363bb95cc7d..a085dbcf5c7f 100644 --- a/net/decnet/dn_neigh.c +++ b/net/decnet/dn_neigh.c @@ -48,7 +48,6 @@ #include <net/dn_neigh.h> #include <net/dn_route.h> -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; |