#endif
static int llc_find_offset(int state, int ev_type);
-static void llc_conn_send_pdus(struct sock *sk);
+static int llc_conn_send_pdus(struct sock *sk, struct sk_buff *skb);
static int llc_conn_service(struct sock *sk, struct sk_buff *skb);
static int llc_exec_conn_trans_actions(struct sock *sk,
struct llc_conn_state_trans *trans,
return rc;
}
-void llc_conn_send_pdu(struct sock *sk, struct sk_buff *skb)
+int llc_conn_send_pdu(struct sock *sk, struct sk_buff *skb)
{
/* queue PDU to send to MAC layer */
skb_queue_tail(&sk->sk_write_queue, skb);
- llc_conn_send_pdus(sk);
+ return llc_conn_send_pdus(sk, skb);
}
/**
if (howmany_resend > 0)
llc->vS = (llc->vS + 1) % LLC_2_SEQ_NBR_MODULO;
/* any PDUs to re-send are queued up; start sending to MAC */
- llc_conn_send_pdus(sk);
+ llc_conn_send_pdus(sk, NULL);
out:;
}
if (howmany_resend > 0)
llc->vS = (llc->vS + 1) % LLC_2_SEQ_NBR_MODULO;
/* any PDUs to re-send are queued up; start sending to MAC */
- llc_conn_send_pdus(sk);
+ llc_conn_send_pdus(sk, NULL);
out:;
}
/**
* llc_conn_send_pdus - Sends queued PDUs
* @sk: active connection
+ * @hold_skb: the skb held by caller, or NULL if does not care
*
- * Sends queued pdus to MAC layer for transmission.
+ * Sends queued pdus to MAC layer for transmission. When @hold_skb is
+ * NULL, always return 0. Otherwise, return 0 if @hold_skb is sent
+ * successfully, or 1 for failure.
*/
-static void llc_conn_send_pdus(struct sock *sk)
+static int llc_conn_send_pdus(struct sock *sk, struct sk_buff *hold_skb)
{
struct sk_buff *skb;
+ int ret = 0;
while ((skb = skb_dequeue(&sk->sk_write_queue)) != NULL) {
struct llc_pdu_sn *pdu = llc_pdu_sn_hdr(skb);
skb_queue_tail(&llc_sk(sk)->pdu_unack_q, skb);
if (!skb2)
break;
- skb = skb2;
+ dev_queue_xmit(skb2);
+ } else {
+ bool is_target = skb == hold_skb;
+ int rc;
+
+ if (is_target)
+ skb_get(skb);
+ rc = dev_queue_xmit(skb);
+ if (is_target)
+ ret = rc;
}
- dev_queue_xmit(skb);
}
+
+ return ret;
}
/**