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authorRémi Denis-Courmont <remi.denis-courmont@nokia.com>2009-11-09 02:17:01 +0000
committerDavid S. Miller <davem@davemloft.net>2009-11-10 20:54:33 -0800
commit6b0d07ba152893b40f1014a9db8da5aa564aa00e (patch)
tree012470cadabfe9307f9c4fbc1b2eb56efbb6edc7 /net/phonet/socket.c
parent4a9b5e5053a184ada2e9b19aee12b6200bb8980f (diff)
downloadlinux-6b0d07ba152893b40f1014a9db8da5aa564aa00e.tar.gz
Phonet: put sockets in a hash table
Signed-off-by: Rémi Denis-Courmont <remi.denis-courmont@nokia.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/phonet/socket.c')
-rw-r--r--net/phonet/socket.c79
1 files changed, 54 insertions, 25 deletions
diff --git a/net/phonet/socket.c b/net/phonet/socket.c
index 0412beb59a0..4112b6e1c48 100644
--- a/net/phonet/socket.c
+++ b/net/phonet/socket.c
@@ -45,13 +45,28 @@ static int pn_socket_release(struct socket *sock)
return 0;
}
+#define PN_HASHSIZE 16
+#define PN_HASHMASK (PN_HASHSIZE-1)
+
+
static struct {
- struct hlist_head hlist;
+ struct hlist_head hlist[PN_HASHSIZE];
spinlock_t lock;
-} pnsocks = {
- .hlist = HLIST_HEAD_INIT,
- .lock = __SPIN_LOCK_UNLOCKED(pnsocks.lock),
-};
+} pnsocks;
+
+void __init pn_sock_init(void)
+{
+ unsigned i;
+
+ for (i = 0; i < PN_HASHSIZE; i++)
+ INIT_HLIST_HEAD(pnsocks.hlist + i);
+ spin_lock_init(&pnsocks.lock);
+}
+
+static struct hlist_head *pn_hash_list(u16 obj)
+{
+ return pnsocks.hlist + (obj & PN_HASHMASK);
+}
/*
* Find address based on socket address, match only certain fields.
@@ -64,10 +79,11 @@ struct sock *pn_find_sock_by_sa(struct net *net, const struct sockaddr_pn *spn)
struct sock *rval = NULL;
u16 obj = pn_sockaddr_get_object(spn);
u8 res = spn->spn_resource;
+ struct hlist_head *hlist = pn_hash_list(obj);
spin_lock_bh(&pnsocks.lock);
- sk_for_each(sknode, node, &pnsocks.hlist) {
+ sk_for_each(sknode, node, hlist) {
struct pn_sock *pn = pn_sk(sknode);
BUG_ON(!pn->sobject); /* unbound socket */
@@ -99,31 +115,39 @@ struct sock *pn_find_sock_by_sa(struct net *net, const struct sockaddr_pn *spn)
/* Deliver a broadcast packet (only in bottom-half) */
void pn_deliver_sock_broadcast(struct net *net, struct sk_buff *skb)
{
- struct hlist_node *node;
- struct sock *sknode;
+ struct hlist_head *hlist = pnsocks.hlist;
+ unsigned h;
spin_lock(&pnsocks.lock);
- sk_for_each(sknode, node, &pnsocks.hlist) {
- struct sk_buff *clone;
+ for (h = 0; h < PN_HASHSIZE; h++) {
+ struct hlist_node *node;
+ struct sock *sknode;
- if (!net_eq(sock_net(sknode), net))
- continue;
- if (!sock_flag(sknode, SOCK_BROADCAST))
- continue;
+ sk_for_each(sknode, node, hlist) {
+ struct sk_buff *clone;
- clone = skb_clone(skb, GFP_ATOMIC);
- if (clone) {
- sock_hold(sknode);
- sk_receive_skb(sknode, clone, 0);
+ if (!net_eq(sock_net(sknode), net))
+ continue;
+ if (!sock_flag(sknode, SOCK_BROADCAST))
+ continue;
+
+ clone = skb_clone(skb, GFP_ATOMIC);
+ if (clone) {
+ sock_hold(sknode);
+ sk_receive_skb(sknode, clone, 0);
+ }
}
+ hlist++;
}
spin_unlock(&pnsocks.lock);
}
void pn_sock_hash(struct sock *sk)
{
+ struct hlist_head *hlist = pn_hash_list(pn_sk(sk)->sobject);
+
spin_lock_bh(&pnsocks.lock);
- sk_add_node(sk, &pnsocks.hlist);
+ sk_add_node(sk, hlist);
spin_unlock_bh(&pnsocks.lock);
}
EXPORT_SYMBOL(pn_sock_hash);
@@ -439,15 +463,20 @@ EXPORT_SYMBOL(pn_sock_get_port);
static struct sock *pn_sock_get_idx(struct seq_file *seq, loff_t pos)
{
struct net *net = seq_file_net(seq);
+ struct hlist_head *hlist = pnsocks.hlist;
struct hlist_node *node;
struct sock *sknode;
+ unsigned h;
- sk_for_each(sknode, node, &pnsocks.hlist) {
- if (!net_eq(net, sock_net(sknode)))
- continue;
- if (!pos)
- return sknode;
- pos--;
+ for (h = 0; h < PN_HASHSIZE; h++) {
+ sk_for_each(sknode, node, hlist) {
+ if (!net_eq(net, sock_net(sknode)))
+ continue;
+ if (!pos)
+ return sknode;
+ pos--;
+ }
+ hlist++;
}
return NULL;
}