[PATCH] WE-21 for zd1201

[mv-sheeva.git] / net / core / sock.c

diff --git a/net/core/sock.c b/net/core/sock.c
index 51fcfbc041a73d38f0172a77c1e5e48b1224f0b7..b77e155cbe6c036acc1413a1470c5f92d9b05c6c 100644 (file)
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -187,13 +187,13 @@ static struct lock_class_key af_callback_keys[AF_MAX];
 #define SK_RMEM_MAX            (_SK_MEM_OVERHEAD * _SK_MEM_PACKETS)
 
 /* Run time adjustable parameters. */
-__u32 sysctl_wmem_max = SK_WMEM_MAX;
-__u32 sysctl_rmem_max = SK_RMEM_MAX;
-__u32 sysctl_wmem_default = SK_WMEM_MAX;
-__u32 sysctl_rmem_default = SK_RMEM_MAX;
+__u32 sysctl_wmem_max __read_mostly = SK_WMEM_MAX;
+__u32 sysctl_rmem_max __read_mostly = SK_RMEM_MAX;
+__u32 sysctl_wmem_default __read_mostly = SK_WMEM_MAX;
+__u32 sysctl_rmem_default __read_mostly = SK_RMEM_MAX;
 
 /* Maximal space eaten by iovec or ancilliary data plus some space */
-int sysctl_optmem_max = sizeof(unsigned long)*(2*UIO_MAXIOV + 512);
+int sysctl_optmem_max __read_mostly = sizeof(unsigned long)*(2*UIO_MAXIOV+512);
 
 static int sock_set_timeout(long *timeo_p, char __user *optval, int optlen)
 {
@@ -247,11 +247,7 @@ int sock_queue_rcv_skb(struct sock *sk, struct sk_buff *skb)
                goto out;
        }
 
-       /* It would be deadlock, if sock_queue_rcv_skb is used
-          with socket lock! We assume that users of this
-          function are lock free.
-       */
-       err = sk_filter(sk, skb, 1);
+       err = sk_filter(sk, skb);
        if (err)
                goto out;
 
@@ -278,7 +274,7 @@ int sk_receive_skb(struct sock *sk, struct sk_buff *skb)
 {
        int rc = NET_RX_SUCCESS;
 
-       if (sk_filter(sk, skb, 0))
+       if (sk_filter(sk, skb))
                goto discard_and_relse;
 
        skb->dev = NULL;
@@ -606,15 +602,15 @@ set_rcvbuf:
                        break;
 
                case SO_DETACH_FILTER:
-                       spin_lock_bh(&sk->sk_lock.slock);
-                       filter = sk->sk_filter;
+                       rcu_read_lock_bh();
+                       filter = rcu_dereference(sk->sk_filter);
                         if (filter) {
-                               sk->sk_filter = NULL;
-                               spin_unlock_bh(&sk->sk_lock.slock);
+                               rcu_assign_pointer(sk->sk_filter, NULL);
                                sk_filter_release(sk, filter);
+                               rcu_read_unlock_bh();
                                break;
                        }
-                       spin_unlock_bh(&sk->sk_lock.slock);
+                       rcu_read_unlock_bh();
                        ret = -ENONET;
                        break;
 
@@ -884,10 +880,10 @@ void sk_free(struct sock *sk)
        if (sk->sk_destruct)
                sk->sk_destruct(sk);
 
-       filter = sk->sk_filter;
+       filter = rcu_dereference(sk->sk_filter);
        if (filter) {
                sk_filter_release(sk, filter);
-               sk->sk_filter = NULL;
+               rcu_assign_pointer(sk->sk_filter, NULL);
        }
 
        sock_disable_timestamp(sk);
@@ -911,7 +907,7 @@ struct sock *sk_clone(const struct sock *sk, const gfp_t priority)
        if (newsk != NULL) {
                struct sk_filter *filter;
 
-               memcpy(newsk, sk, sk->sk_prot->obj_size);
+               sock_copy(newsk, sk);
 
                /* SANITY */
                sk_node_init(&newsk->sk_node);