1 files changed, 43 insertions, 4 deletions

diff --git a/net/iucv/af_iucv.c b/net/iucv/af_iucv.c
index 29f7baa2511..eb8a2a0b6eb 100644
--- a/net/iucv/af_iucv.c
+++ b/net/iucv/af_iucv.c
@@ -8,6 +8,9 @@
  *  Author(s):	Jennifer Hunt <jenhunt@us.ibm.com>
  */
 
+#define KMSG_COMPONENT "af_iucv"
+#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+
 #include <linux/module.h>
 #include <linux/types.h>
 #include <linux/list.h>
@@ -491,7 +494,21 @@ static int iucv_sock_connect(struct socket *sock, struct sockaddr *addr,
 	if (err) {
 		iucv_path_free(iucv->path);
 		iucv->path = NULL;
-		err = -ECONNREFUSED;
+		switch (err) {
+		case 0x0b:	/* Target communicator is not logged on */
+			err = -ENETUNREACH;
+			break;
+		case 0x0d:	/* Max connections for this guest exceeded */
+		case 0x0e:	/* Max connections for target guest exceeded */
+			err = -EAGAIN;
+			break;
+		case 0x0f:	/* Missing IUCV authorization */
+			err = -EACCES;
+			break;
+		default:
+			err = -ECONNREFUSED;
+			break;
+		}
 		goto done;
 	}
 
@@ -504,6 +521,13 @@ static int iucv_sock_connect(struct socket *sock, struct sockaddr *addr,
 		release_sock(sk);
 		return -ECONNREFUSED;
 	}
+
+	if (err) {
+		iucv_path_sever(iucv->path, NULL);
+		iucv_path_free(iucv->path);
+		iucv->path = NULL;
+	}
+
 done:
 	release_sock(sk);
 	return err;
@@ -616,6 +640,8 @@ static int iucv_sock_sendmsg(struct kiocb *iocb, struct socket *sock,
 	struct iucv_sock *iucv = iucv_sk(sk);
 	struct sk_buff *skb;
 	struct iucv_message txmsg;
+	char user_id[9];
+	char appl_id[9];
 	int err;
 
 	err = sock_error(sk);
@@ -651,8 +677,15 @@ static int iucv_sock_sendmsg(struct kiocb *iocb, struct socket *sock,
 		err = iucv_message_send(iucv->path, &txmsg, 0, 0,
 					(void *) skb->data, skb->len);
 		if (err) {
-			if (err == 3)
-				printk(KERN_ERR "AF_IUCV msg limit exceeded\n");
+			if (err == 3) {
+				user_id[8] = 0;
+				memcpy(user_id, iucv->dst_user_id, 8);
+				appl_id[8] = 0;
+				memcpy(appl_id, iucv->dst_name, 8);
+				pr_err("Application %s on z/VM guest %s"
+				       " exceeds message limit\n",
+				       user_id, appl_id);
+			}
 			skb_unlink(skb, &iucv->send_skb_q);
 			err = -EPIPE;
 			goto fail;
@@ -1009,12 +1042,14 @@ static int iucv_callback_connreq(struct iucv_path *path,
 	ASCEBC(user_data, sizeof(user_data));
 	if (sk->sk_state != IUCV_LISTEN) {
 		err = iucv_path_sever(path, user_data);
+		iucv_path_free(path);
 		goto fail;
 	}
 
 	/* Check for backlog size */
 	if (sk_acceptq_is_full(sk)) {
 		err = iucv_path_sever(path, user_data);
+		iucv_path_free(path);
 		goto fail;
 	}
 
@@ -1022,6 +1057,7 @@ static int iucv_callback_connreq(struct iucv_path *path,
 	nsk = iucv_sock_alloc(NULL, SOCK_STREAM, GFP_ATOMIC);
 	if (!nsk) {
 		err = iucv_path_sever(path, user_data);
+		iucv_path_free(path);
 		goto fail;
 	}
 
@@ -1045,6 +1081,8 @@ static int iucv_callback_connreq(struct iucv_path *path,
 	err = iucv_path_accept(path, &af_iucv_handler, nuser_data, nsk);
 	if (err) {
 		err = iucv_path_sever(path, user_data);
+		iucv_path_free(path);
+		iucv_sock_kill(nsk);
 		goto fail;
 	}
 
@@ -1190,7 +1228,8 @@ static int __init afiucv_init(void)
 	int err;
 
 	if (!MACHINE_IS_VM) {
-		printk(KERN_ERR "AF_IUCV connection needs VM as base\n");
+		pr_err("The af_iucv module cannot be loaded"
+		       " without z/VM\n");
 		err = -EPROTONOSUPPORT;
 		goto out;
 	}