include/net/iucv/af_iucv.h

   1 /*
   2  * Copyright 2006 IBM Corporation
   3  * IUCV protocol stack for Linux on zSeries
   4  * Version 1.0
   5  * Author(s): Jennifer Hunt <jenhunt@us.ibm.com>
   6  *
   7  */
   8
   9 #ifndef __AFIUCV_H
  10 #define __AFIUCV_H
  11
  12 #include <asm/types.h>
  13 #include <asm/byteorder.h>
  14 #include <linux/list.h>
  15 #include <linux/poll.h>
  16 #include <linux/socket.h>
  17
  18 #ifndef AF_IUCV
  19 #define AF_IUCV         32
  20 #define PF_IUCV         AF_IUCV
  21 #endif
  22
  23 /* Connection and socket states */
  24 enum {
  25         IUCV_CONNECTED = 1,
  26         IUCV_OPEN,
  27         IUCV_BOUND,
  28         IUCV_LISTEN,
  29         IUCV_SEVERED,
  30         IUCV_DISCONN,
  31         IUCV_CLOSING,
  32         IUCV_CLOSED
  33 };
  34
  35 #define IUCV_QUEUELEN_DEFAULT   65535
  36 #define IUCV_CONN_TIMEOUT       (HZ * 40)
  37 #define IUCV_DISCONN_TIMEOUT    (HZ * 2)
  38 #define IUCV_CONN_IDLE_TIMEOUT  (HZ * 60)
  39 #define IUCV_BUFSIZE_DEFAULT    32768
  40
  41 /* IUCV socket address */
  42 struct sockaddr_iucv {
  43         sa_family_t     siucv_family;
  44         unsigned short  siucv_port;             /* Reserved */
  45         unsigned int    siucv_addr;             /* Reserved */
  46         char            siucv_nodeid[8];        /* Reserved */
  47         char            siucv_user_id[8];       /* Guest User Id */
  48         char            siucv_name[8];          /* Application Name */
  49 };
  50
  51
  52 /* Common socket structures and functions */
  53
  54 #define iucv_sk(__sk) ((struct iucv_sock *) __sk)
  55
  56 struct iucv_sock {
  57         struct sock             sk;
  58         char                    src_user_id[8];
  59         char                    src_name[8];
  60         char                    dst_user_id[8];
  61         char                    dst_name[8];
  62         struct list_head        accept_q;
  63         spinlock_t              accept_q_lock;
  64         struct sock             *parent;
  65         struct iucv_path        *path;
  66         struct sk_buff_head     send_skb_q;
  67         struct sk_buff_head     backlog_skb_q;
  68         unsigned int            send_tag;
  69 };
  70
  71 struct iucv_sock_list {
  72         struct hlist_head head;
  73         rwlock_t          lock;
  74         atomic_t          autobind_name;
  75 };
  76
  77 static void iucv_sock_destruct(struct sock *sk);
  78 static void iucv_sock_cleanup_listen(struct sock *parent);
  79 static void iucv_sock_kill(struct sock *sk);
  80 static void iucv_sock_close(struct sock *sk);
  81 static int  iucv_sock_bind(struct socket *sock, struct sockaddr *addr,
  82                         int addr_len);
  83 static int  iucv_sock_connect(struct socket *sock, struct sockaddr *addr,
  84                               int alen, int flags);
  85 static int  iucv_sock_listen(struct socket *sock, int backlog);
  86 static int  iucv_sock_accept(struct socket *sock, struct socket *newsock,
  87                              int flags);
  88 static int  iucv_sock_getname(struct socket *sock, struct sockaddr *addr,
  89                               int *len, int peer);
  90 static int  iucv_sock_sendmsg(struct kiocb *iocb, struct socket *sock,
  91                               struct msghdr *msg, size_t len);
  92 static int  iucv_sock_recvmsg(struct kiocb *iocb, struct socket *sock,
  93                               struct msghdr *msg, size_t len, int flags);
  94 unsigned int iucv_sock_poll(struct file *file, struct socket *sock,
  95                             poll_table *wait);
  96 static int iucv_sock_release(struct socket *sock);
  97 static int iucv_sock_shutdown(struct socket *sock, int how);
  98
  99 void iucv_sock_link(struct iucv_sock_list *l, struct sock *s);
 100 void iucv_sock_unlink(struct iucv_sock_list *l, struct sock *s);
 101 int  iucv_sock_wait_state(struct sock *sk, int state, int state2,
 102                           unsigned long timeo);
 103 int  iucv_sock_wait_cnt(struct sock *sk, unsigned long timeo);
 104 void iucv_accept_enqueue(struct sock *parent, struct sock *sk);
 105 void iucv_accept_unlink(struct sock *sk);
 106 struct sock *iucv_accept_dequeue(struct sock *parent, struct socket *newsock);
 107
 108 #endif /* __IUCV_H */