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-rw-r--r--net/iucv/af_iucv.c34
1 files changed, 26 insertions, 8 deletions
diff --git a/net/iucv/af_iucv.c b/net/iucv/af_iucv.c
index 02b45a8e8b35..cfb9e5f4e28f 100644
--- a/net/iucv/af_iucv.c
+++ b/net/iucv/af_iucv.c
@@ -453,19 +453,27 @@ static void iucv_sever_path(struct sock *sk, int with_user_data)
}
}
-/* Send FIN through an IUCV socket for HIPER transport */
+/* Send controlling flags through an IUCV socket for HIPER transport */
static int iucv_send_ctrl(struct sock *sk, u8 flags)
{
int err = 0;
int blen;
struct sk_buff *skb;
+ u8 shutdown = 0;
blen = sizeof(struct af_iucv_trans_hdr) + ETH_HLEN;
+ if (sk->sk_shutdown & SEND_SHUTDOWN) {
+ /* controlling flags should be sent anyway */
+ shutdown = sk->sk_shutdown;
+ sk->sk_shutdown &= RCV_SHUTDOWN;
+ }
skb = sock_alloc_send_skb(sk, blen, 1, &err);
if (skb) {
skb_reserve(skb, blen);
err = afiucv_hs_send(NULL, sk, skb, flags);
}
+ if (shutdown)
+ sk->sk_shutdown = shutdown;
return err;
}
@@ -1315,8 +1323,13 @@ static void iucv_process_message(struct sock *sk, struct sk_buff *skb,
}
IUCV_SKB_CB(skb)->offset = 0;
- if (sock_queue_rcv_skb(sk, skb))
- skb_queue_head(&iucv_sk(sk)->backlog_skb_q, skb);
+ if (sk_filter(sk, skb)) {
+ atomic_inc(&sk->sk_drops); /* skb rejected by filter */
+ kfree_skb(skb);
+ return;
+ }
+ if (__sock_queue_rcv_skb(sk, skb)) /* handle rcv queue full */
+ skb_queue_tail(&iucv_sk(sk)->backlog_skb_q, skb);
}
/* iucv_process_message_q() - Process outstanding IUCV messages
@@ -1430,13 +1443,13 @@ static int iucv_sock_recvmsg(struct socket *sock, struct msghdr *msg,
rskb = skb_dequeue(&iucv->backlog_skb_q);
while (rskb) {
IUCV_SKB_CB(rskb)->offset = 0;
- if (sock_queue_rcv_skb(sk, rskb)) {
+ if (__sock_queue_rcv_skb(sk, rskb)) {
+ /* handle rcv queue full */
skb_queue_head(&iucv->backlog_skb_q,
rskb);
break;
- } else {
- rskb = skb_dequeue(&iucv->backlog_skb_q);
}
+ rskb = skb_dequeue(&iucv->backlog_skb_q);
}
if (skb_queue_empty(&iucv->backlog_skb_q)) {
if (!list_empty(&iucv->message_q.list))
@@ -2116,12 +2129,17 @@ static int afiucv_hs_callback_rx(struct sock *sk, struct sk_buff *skb)
skb_reset_transport_header(skb);
skb_reset_network_header(skb);
IUCV_SKB_CB(skb)->offset = 0;
+ if (sk_filter(sk, skb)) {
+ atomic_inc(&sk->sk_drops); /* skb rejected by filter */
+ kfree_skb(skb);
+ return NET_RX_SUCCESS;
+ }
+
spin_lock(&iucv->message_q.lock);
if (skb_queue_empty(&iucv->backlog_skb_q)) {
- if (sock_queue_rcv_skb(sk, skb)) {
+ if (__sock_queue_rcv_skb(sk, skb))
/* handle rcv queue full */
skb_queue_tail(&iucv->backlog_skb_q, skb);
- }
} else
skb_queue_tail(&iucv_sk(sk)->backlog_skb_q, skb);
spin_unlock(&iucv->message_q.lock);