include/linux/sunrpc/clnt.h

   1 /*
   2  *  linux/include/linux/sunrpc/clnt.h
   3  *
   4  *  Declarations for the high-level RPC client interface
   5  *
   6  *  Copyright (C) 1995, 1996, Olaf Kirch <okir@monad.swb.de>
   7  */
   8
   9 #ifndef _LINUX_SUNRPC_CLNT_H
  10 #define _LINUX_SUNRPC_CLNT_H
  11
  12 #include <linux/sunrpc/msg_prot.h>
  13 #include <linux/sunrpc/sched.h>
  14 #include <linux/sunrpc/xprt.h>
  15 #include <linux/sunrpc/auth.h>
  16 #include <linux/sunrpc/stats.h>
  17 #include <linux/sunrpc/xdr.h>
  18
  19 /*
  20  * This defines an RPC port mapping
  21  */
  22 struct rpc_portmap {
  23         __u32                   pm_prog;
  24         __u32                   pm_vers;
  25         __u32                   pm_prot;
  26         __u16                   pm_port;
  27 };
  28
  29 /*
  30  * The high-level client handle
  31  */
  32 struct rpc_clnt {
  33         atomic_t                cl_users;       /* number of references */
  34         struct rpc_xprt *       cl_xprt;        /* transport */
  35         struct rpc_procinfo *   cl_procinfo;    /* procedure info */
  36         u32                     cl_maxproc;     /* max procedure number */
  37
  38         char *                  cl_server;      /* server machine name */
  39         char *                  cl_protname;    /* protocol name */
  40         struct rpc_auth *       cl_auth;        /* authenticator */
  41         struct rpc_stat *       cl_stats;       /* statistics */
  42
  43         unsigned int            cl_softrtry : 1,/* soft timeouts */
  44                                 cl_intr     : 1,/* interruptible */
  45                                 cl_chatty   : 1,/* be verbose */
  46                                 cl_autobind : 1,/* use getport() */
  47                                 cl_binding  : 1,/* doing a getport() */
  48                                 cl_oneshot  : 1,/* dispose after use */
  49                                 cl_dead     : 1;/* abandoned */
  50         unsigned int            cl_flags;       /* misc client flags */
  51         unsigned long           cl_hardmax;     /* max hard timeout */
  52
  53         struct rpc_portmap      cl_pmap;        /* port mapping */
  54         struct rpc_wait_queue   cl_bindwait;    /* waiting on getport() */
  55
  56         int                     cl_nodelen;     /* nodename length */
  57         char                    cl_nodename[UNX_MAXNODENAME];
  58 };
  59 #define cl_timeout              cl_xprt->timeout
  60 #define cl_prog                 cl_pmap.pm_prog
  61 #define cl_vers                 cl_pmap.pm_vers
  62 #define cl_port                 cl_pmap.pm_port
  63 #define cl_prot                 cl_pmap.pm_prot
  64
  65 /*
  66  * General RPC program info
  67  */
  68 #define RPC_MAXVERSION          4
  69 struct rpc_program {
  70         char *                  name;           /* protocol name */
  71         u32                     number;         /* program number */
  72         unsigned int            nrvers;         /* number of versions */
  73         struct rpc_version **   version;        /* version array */
  74         struct rpc_stat *       stats;          /* statistics */
  75 };
  76
  77 struct rpc_version {
  78         u32                     number;         /* version number */
  79         unsigned int            nrprocs;        /* number of procs */
  80         struct rpc_procinfo *   procs;          /* procedure array */
  81 };
  82
  83 /*
  84  * Procedure information
  85  */
  86 struct rpc_procinfo {
  87         char *                  p_procname;     /* procedure name */
  88         kxdrproc_t              p_encode;       /* XDR encode function */
  89         kxdrproc_t              p_decode;       /* XDR decode function */
  90         unsigned int            p_bufsiz;       /* req. buffer size */
  91         unsigned int            p_count;        /* call count */
  92 };
  93
  94 #define rpcproc_bufsiz(clnt, proc)      ((clnt)->cl_procinfo[proc].p_bufsiz)
  95 #define rpcproc_encode(clnt, proc)      ((clnt)->cl_procinfo[proc].p_encode)
  96 #define rpcproc_decode(clnt, proc)      ((clnt)->cl_procinfo[proc].p_decode)
  97 #define rpcproc_name(clnt, proc)        ((clnt)->cl_procinfo[proc].p_procname)
  98 #define rpcproc_count(clnt, proc)       ((clnt)->cl_procinfo[proc].p_count)
  99
 100 #define RPC_CONGESTED(clnt)     (RPCXPRT_CONGESTED((clnt)->cl_xprt))
 101 #define RPC_PEERADDR(clnt)      (&(clnt)->cl_xprt->addr)
 102
 103 #ifdef __KERNEL__
 104
 105 struct rpc_clnt *rpc_create_client(struct rpc_xprt *xprt, char *servname,
 106                                 struct rpc_program *info,
 107                                 u32 version, int authflavor);
 108 int             rpc_shutdown_client(struct rpc_clnt *);
 109 int             rpc_destroy_client(struct rpc_clnt *);
 110 void            rpc_release_client(struct rpc_clnt *);
 111 void            rpc_getport(struct rpc_task *, struct rpc_clnt *);
 112 int             rpc_register(u32, u32, int, unsigned short, int *);
 113
 114 void            rpc_call_setup(struct rpc_task *, struct rpc_message *, int);
 115
 116 int             rpc_call_async(struct rpc_clnt *clnt, struct rpc_message *msg,
 117                                int flags, rpc_action callback, void *clntdata);
 118 int             rpc_call_sync(struct rpc_clnt *clnt, struct rpc_message *msg,
 119                               int flags);
 120 void            rpc_restart_call(struct rpc_task *);
 121 void            rpc_clnt_sigmask(struct rpc_clnt *clnt, sigset_t *oldset);
 122 void            rpc_clnt_sigunmask(struct rpc_clnt *clnt, sigset_t *oldset);
 123
 124 static __inline__
 125 int rpc_call(struct rpc_clnt *clnt, u32 proc, void *argp, void *resp, int flags)
 126 {
 127         struct rpc_message msg = { proc, argp, resp, NULL };
 128         return rpc_call_sync(clnt, &msg, flags);
 129 }
 130
 131
 132 extern __inline__ void
 133 rpc_set_timeout(struct rpc_clnt *clnt, unsigned int retr, unsigned long incr)
 134 {
 135         xprt_set_timeout(&clnt->cl_timeout, retr, incr);
 136 }
 137
 138 extern void rpciod_tcp_dispatcher(void);
 139 extern void rpciod_wake_up(void);
 140
 141 /*
 142  * Helper function for NFSroot support
 143  */
 144 int             rpc_getport_external(struct sockaddr_in *, __u32, __u32, int);
 145
 146 #endif /* __KERNEL__ */
 147 #endif /* _LINUX_SUNRPC_CLNT_H */