[S390]: Add AF_IUCV socket support

From: Jennifer Hunt <jenhunt@us.ibm.com>

This patch adds AF_IUCV socket support.

Signed-off-by: Frank Pavlic <fpavlic@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

3 files changed, 110 insertions, 2 deletions

diff --git a/include/linux/net.h b/include/linux/net.h
index f28d8a2e2c91..4db21e63d8d2 100644
--- a/include/linux/net.h
+++ b/include/linux/net.h
@@ -24,7 +24,7 @@
 struct poll_table_struct;
 struct inode;
 
-#define NPROTO          32              /* should be enough for now..   */
+#define NPROTO          33              /* should be enough for now..   */
 
 #define SYS_SOCKET      1               /* sys_socket(2)                */
 #define SYS_BIND        2               /* sys_bind(2)                  */
diff --git a/include/linux/socket.h b/include/linux/socket.h
index 92cd38efad7f..fcd35a210e7f 100644
--- a/include/linux/socket.h
+++ b/include/linux/socket.h
@@ -187,7 +187,8 @@ struct ucred {
 #define AF_LLC          26      /* Linux LLC                    */
 #define AF_TIPC         30      /* TIPC sockets                 */
 #define AF_BLUETOOTH    31      /* Bluetooth sockets            */
-#define AF_MAX          32      /* For now.. */
+#define AF_IUCV         32      /* IUCV sockets                 */
+#define AF_MAX          33      /* For now.. */
 
 /* Protocol families, same as address families. */
 #define PF_UNSPEC       AF_UNSPEC
@@ -220,6 +221,7 @@ struct ucred {
 #define PF_LLC          AF_LLC
 #define PF_TIPC         AF_TIPC
 #define PF_BLUETOOTH    AF_BLUETOOTH
+#define PF_IUCV         AF_IUCV
 #define PF_MAX          AF_MAX
 
 /* Maximum queue length specifiable by listen.  */
diff --git a/include/net/iucv/af_iucv.h b/include/net/iucv/af_iucv.h
new file mode 100644
index 000000000000..04d1abb72d25
--- /dev/null
+++ b/include/net/iucv/af_iucv.h
@@ -0,0 +1,106 @@
+/*
+ * Copyright 2006 IBM Corporation
+ * IUCV protocol stack for Linux on zSeries
+ * Version 1.0
+ * Author(s): Jennifer Hunt <jenhunt@us.ibm.com>
+ *
+ */
+
+#ifndef __AFIUCV_H
+#define __AFIUCV_H
+
+#include <asm/types.h>
+#include <asm/byteorder.h>
+#include <linux/list.h>
+#include <linux/poll.h>
+#include <linux/socket.h>
+
+#ifndef AF_IUCV
+#define AF_IUCV         32
+#define PF_IUCV         AF_IUCV
+#endif
+
+/* Connection and socket states */
+enum {
+        IUCV_CONNECTED = 1,
+        IUCV_OPEN,
+        IUCV_BOUND,
+        IUCV_LISTEN,
+        IUCV_SEVERED,
+        IUCV_DISCONN,
+        IUCV_CLOSED
+};
+
+#define IUCV_QUEUELEN_DEFAULT   65535
+#define IUCV_CONN_TIMEOUT       (HZ * 40)
+#define IUCV_DISCONN_TIMEOUT    (HZ * 2)
+#define IUCV_CONN_IDLE_TIMEOUT  (HZ * 60)
+#define IUCV_BUFSIZE_DEFAULT    32768
+
+/* IUCV socket address */
+struct sockaddr_iucv {
+        sa_family_t     siucv_family;
+        unsigned short  siucv_port;             /* Reserved */
+        unsigned int    siucv_addr;             /* Reserved */
+        char            siucv_nodeid[8];        /* Reserved */
+        char            siucv_user_id[8];       /* Guest User Id */
+        char            siucv_name[8];          /* Application Name */
+};
+
+
+/* Common socket structures and functions */
+
+#define iucv_sk(__sk) ((struct iucv_sock *) __sk)
+
+struct iucv_sock {
+        struct sock             sk;
+        char                    src_user_id[8];
+        char                    src_name[8];
+        char                    dst_user_id[8];
+        char                    dst_name[8];
+        struct list_head        accept_q;
+        struct sock             *parent;
+        struct iucv_path        *path;
+        struct sk_buff_head     send_skb_q;
+        unsigned int            send_tag;
+};
+
+struct iucv_sock_list {
+        struct hlist_head head;
+        rwlock_t          lock;
+        atomic_t          autobind_name;
+};
+
+static void iucv_sock_destruct(struct sock *sk);
+static void iucv_sock_cleanup_listen(struct sock *parent);
+static void iucv_sock_kill(struct sock *sk);
+static void iucv_sock_close(struct sock *sk);
+static int  iucv_sock_create(struct socket *sock, int proto);
+static int  iucv_sock_bind(struct socket *sock, struct sockaddr *addr,
+                        int addr_len);
+static int  iucv_sock_connect(struct socket *sock, struct sockaddr *addr,
+                              int alen, int flags);
+static int  iucv_sock_listen(struct socket *sock, int backlog);
+static int  iucv_sock_accept(struct socket *sock, struct socket *newsock,
+                             int flags);
+static int  iucv_sock_getname(struct socket *sock, struct sockaddr *addr,
+                              int *len, int peer);
+static int  iucv_sock_sendmsg(struct kiocb *iocb, struct socket *sock,
+                              struct msghdr *msg, size_t len);
+static int  iucv_sock_recvmsg(struct kiocb *iocb, struct socket *sock,
+                              struct msghdr *msg, size_t len, int flags);
+unsigned int iucv_sock_poll(struct file *file, struct socket *sock,
+                            poll_table *wait);
+static int iucv_sock_release(struct socket *sock);
+static int iucv_sock_shutdown(struct socket *sock, int how);
+
+void iucv_sock_link(struct iucv_sock_list *l, struct sock *s);
+void iucv_sock_unlink(struct iucv_sock_list *l, struct sock *s);
+int  iucv_sock_wait_state(struct sock *sk, int state, int state2,
+                          unsigned long timeo);
+int  iucv_sock_wait_cnt(struct sock *sk, unsigned long timeo);
+void iucv_accept_enqueue(struct sock *parent, struct sock *sk);
+void iucv_accept_unlink(struct sock *sk);
+struct sock *iucv_accept_dequeue(struct sock *parent, struct socket *newsock);
+
+#endif /* __IUCV_H */