}
+int sock_queue_rcv_skb(struct sock *sk, struct sk_buff *skb)
+{
+ int err = 0;
+ int skb_len;
+
+ /* Cast skb->rcvbuf to unsigned... It's pointless, but reduces
+ number of warnings when compiling with -W --ANK
+ */
+ if (atomic_read(&sk->sk_rmem_alloc) + skb->truesize >=
+ (unsigned)sk->sk_rcvbuf) {
+ err = -ENOMEM;
+ 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);
+ if (err)
+ goto out;
+
+ skb->dev = NULL;
+ skb_set_owner_r(skb, sk);
+
+ /* Cache the SKB length before we tack it onto the receive
+ * queue. Once it is added it no longer belongs to us and
+ * may be freed by other threads of control pulling packets
+ * from the queue.
+ */
+ skb_len = skb->len;
+
+ skb_queue_tail(&sk->sk_receive_queue, skb);
+
+ if (!sock_flag(sk, SOCK_DEAD))
+ sk->sk_data_ready(sk, skb_len);
+out:
+ return err;
+}
+EXPORT_SYMBOL(sock_queue_rcv_skb);
+
+int sk_receive_skb(struct sock *sk, struct sk_buff *skb)
+{
+ int rc = NET_RX_SUCCESS;
+
+ if (sk_filter(sk, skb, 0))
+ goto discard_and_relse;
+
+ skb->dev = NULL;
+
+ bh_lock_sock(sk);
+ if (!sock_owned_by_user(sk))
+ rc = sk->sk_backlog_rcv(sk, skb);
+ else
+ sk_add_backlog(sk, skb);
+ bh_unlock_sock(sk);
+out:
+ sock_put(sk);
+ return rc;
+discard_and_relse:
+ kfree_skb(skb);
+ goto out;
+}
+EXPORT_SYMBOL(sk_receive_skb);
+
+struct dst_entry *__sk_dst_check(struct sock *sk, u32 cookie)
+{
+ struct dst_entry *dst = sk->sk_dst_cache;
+
+ if (dst && dst->obsolete && dst->ops->check(dst, cookie) == NULL) {
+ sk->sk_dst_cache = NULL;
+ dst_release(dst);
+ return NULL;
+ }
+
+ return dst;
+}
+EXPORT_SYMBOL(__sk_dst_check);
+
+struct dst_entry *sk_dst_check(struct sock *sk, u32 cookie)
+{
+ struct dst_entry *dst = sk_dst_get(sk);
+
+ if (dst && dst->obsolete && dst->ops->check(dst, cookie) == NULL) {
+ sk_dst_reset(sk);
+ dst_release(dst);
+ return NULL;
+ }
+
+ return dst;
+}
+EXPORT_SYMBOL(sk_dst_check);
+
/*
* This is meant for all protocols to use and covers goings on
* at the socket level. Everything here is generic.
val = sysctl_rmem_max;
set_rcvbuf:
sk->sk_userlocks |= SOCK_RCVBUF_LOCK;
- /* FIXME: is this lower bound the right one? */
+ /*
+ * We double it on the way in to account for
+ * "struct sk_buff" etc. overhead. Applications
+ * assume that the SO_RCVBUF setting they make will
+ * allow that much actual data to be received on that
+ * socket.
+ *
+ * Applications are unaware that "struct sk_buff" and
+ * other overheads allocate from the receive buffer
+ * during socket buffer allocation.
+ *
+ * And after considering the possible alternatives,
+ * returning the value we actually used in getsockopt
+ * is the most desirable behavior.
+ */
if ((val * 2) < SOCK_MIN_RCVBUF)
sk->sk_rcvbuf = SOCK_MIN_RCVBUF;
else
if (!valbool) {
sk->sk_bound_dev_if = 0;
} else {
- if (optlen > IFNAMSIZ)
- optlen = IFNAMSIZ;
+ if (optlen > IFNAMSIZ - 1)
+ optlen = IFNAMSIZ - 1;
+ memset(devname, 0, sizeof(devname));
if (copy_from_user(devname, optval, optlen)) {
ret = -EFAULT;
break;
atomic_set(&newsk->sk_omem_alloc, 0);
skb_queue_head_init(&newsk->sk_receive_queue);
skb_queue_head_init(&newsk->sk_write_queue);
+#ifdef CONFIG_NET_DMA
+ skb_queue_head_init(&newsk->sk_async_wait_queue);
+#endif
rwlock_init(&newsk->sk_dst_lock);
rwlock_init(&newsk->sk_callback_lock);
skb_queue_head_init(&sk->sk_receive_queue);
skb_queue_head_init(&sk->sk_write_queue);
skb_queue_head_init(&sk->sk_error_queue);
+#ifdef CONFIG_NET_DMA
+ skb_queue_head_init(&sk->sk_async_wait_queue);
+#endif
sk->sk_send_head = NULL;
EXPORT_SYMBOL(sock_common_getsockopt);
#ifdef CONFIG_COMPAT
-int compat_sock_common_getsockopt(struct socket *sock, int level,
- int optname, char __user *optval, int __user *optlen)
+int compat_sock_common_getsockopt(struct socket *sock, int level, int optname,
+ char __user *optval, int __user *optlen)
{
struct sock *sk = sock->sk;
- if (sk->sk_prot->compat_setsockopt)
- return sk->sk_prot->compat_getsockopt(sk, level,
- optname, optval, optlen);
+ if (sk->sk_prot->compat_setsockopt != NULL)
+ return sk->sk_prot->compat_getsockopt(sk, level, optname,
+ optval, optlen);
return sk->sk_prot->getsockopt(sk, level, optname, optval, optlen);
}
EXPORT_SYMBOL(compat_sock_common_getsockopt);
EXPORT_SYMBOL(sock_common_setsockopt);
#ifdef CONFIG_COMPAT
-int compat_sock_common_setsockopt(struct socket *sock,
- int level, int optname, char __user *optval, int optlen)
+int compat_sock_common_setsockopt(struct socket *sock, int level, int optname,
+ char __user *optval, int optlen)
{
struct sock *sk = sock->sk;
- if (sk->sk_prot->compat_setsockopt)
- return sk->sk_prot->compat_setsockopt(sk, level,
- optname, optval, optlen);
+ if (sk->sk_prot->compat_setsockopt != NULL)
+ return sk->sk_prot->compat_setsockopt(sk, level, optname,
+ optval, optlen);
return sk->sk_prot->setsockopt(sk, level, optname, optval, optlen);
}
EXPORT_SYMBOL(compat_sock_common_setsockopt);