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 #include <linux/sunrpc/timer.h>
  19 #include <asm/signal.h>
  20
  21 /*
  22  * This defines an RPC port mapping
  23  */
  24 struct rpc_portmap {
  25         __u32                   pm_prog;
  26         __u32                   pm_vers;
  27         __u32                   pm_prot;
  28         __u16                   pm_port;
  29         unsigned char           pm_binding : 1; /* doing a getport() */
  30         struct rpc_wait_queue   pm_bindwait;    /* waiting on getport() */
  31 };
  32
  33 struct rpc_inode;
  34
  35 /*
  36  * The high-level client handle
  37  */
  38 struct rpc_clnt {
  39         atomic_t                cl_count;       /* Number of clones */
  40         atomic_t                cl_users;       /* number of references */
  41         struct rpc_xprt *       cl_xprt;        /* transport */
  42         struct rpc_procinfo *   cl_procinfo;    /* procedure info */
  43         u32                     cl_maxproc;     /* max procedure number */
  44
  45         char *                  cl_server;      /* server machine name */
  46         char *                  cl_protname;    /* protocol name */
  47         struct rpc_auth *       cl_auth;        /* authenticator */
  48         struct rpc_stat *       cl_stats;       /* statistics */
  49
  50         unsigned int            cl_softrtry : 1,/* soft timeouts */
  51                                 cl_intr     : 1,/* interruptible */
  52                                 cl_chatty   : 1,/* be verbose */
  53                                 cl_autobind : 1,/* use getport() */
  54                                 cl_oneshot  : 1,/* dispose after use */
  55                                 cl_dead     : 1;/* abandoned */
  56
  57         struct rpc_rtt *        cl_rtt;         /* RTO estimator data */
  58         struct rpc_portmap *    cl_pmap;        /* port mapping */
  59
  60         int                     cl_nodelen;     /* nodename length */
  61         char                    cl_nodename[UNX_MAXNODENAME];
  62         char                    cl_pathname[30];/* Path in rpc_pipe_fs */
  63         struct dentry *         cl_dentry;      /* inode */
  64         struct rpc_clnt *       cl_parent;      /* Points to parent of clones */
  65         struct rpc_rtt          cl_rtt_default;
  66         struct rpc_portmap      cl_pmap_default;
  67         char                    cl_inline_name[32];
  68 };
  69 #define cl_timeout              cl_xprt->timeout
  70 #define cl_prog                 cl_pmap->pm_prog
  71 #define cl_vers                 cl_pmap->pm_vers
  72 #define cl_port                 cl_pmap->pm_port
  73 #define cl_prot                 cl_pmap->pm_prot
  74
  75 /*
  76  * General RPC program info
  77  */
  78 #define RPC_MAXVERSION          4
  79 struct rpc_program {
  80         char *                  name;           /* protocol name */
  81         u32                     number;         /* program number */
  82         unsigned int            nrvers;         /* number of versions */
  83         struct rpc_version **   version;        /* version array */
  84         struct rpc_stat *       stats;          /* statistics */
  85         char *                  pipe_dir_name;  /* path to rpc_pipefs dir */
  86 };
  87
  88 struct rpc_version {
  89         u32                     number;         /* version number */
  90         unsigned int            nrprocs;        /* number of procs */
  91         struct rpc_procinfo *   procs;          /* procedure array */
  92 };
  93
  94 /*
  95  * Procedure information
  96  */
  97 struct rpc_procinfo {
  98         u32                     p_proc;         /* RPC procedure number */
  99         kxdrproc_t              p_encode;       /* XDR encode function */
 100         kxdrproc_t              p_decode;       /* XDR decode function */
 101         unsigned int            p_bufsiz;       /* req. buffer size */
 102         unsigned int            p_count;        /* call count */
 103         unsigned int            p_timer;        /* Which RTT timer to use */
 104 };
 105
 106 #define RPC_CONGESTED(clnt)     (RPCXPRT_CONGESTED((clnt)->cl_xprt))
 107 #define RPC_PEERADDR(clnt)      (&(clnt)->cl_xprt->addr)
 108
 109 #ifdef __KERNEL__
 110
 111 struct rpc_clnt *rpc_create_client(struct rpc_xprt *xprt, char *servname,
 112                                 struct rpc_program *info,
 113                                 u32 version, rpc_authflavor_t authflavor);
 114 struct rpc_clnt *rpc_clone_client(struct rpc_clnt *);
 115 int             rpc_shutdown_client(struct rpc_clnt *);
 116 int             rpc_destroy_client(struct rpc_clnt *);
 117 void            rpc_release_client(struct rpc_clnt *);
 118 void            rpc_getport(struct rpc_task *, struct rpc_clnt *);
 119 int             rpc_register(u32, u32, int, unsigned short, int *);
 120
 121 void            rpc_call_setup(struct rpc_task *, struct rpc_message *, int);
 122
 123 int             rpc_call_async(struct rpc_clnt *clnt, struct rpc_message *msg,
 124                                int flags, rpc_action callback, void *clntdata);
 125 int             rpc_call_sync(struct rpc_clnt *clnt, struct rpc_message *msg,
 126                               int flags);
 127 void            rpc_restart_call(struct rpc_task *);
 128 void            rpc_clnt_sigmask(struct rpc_clnt *clnt, sigset_t *oldset);
 129 void            rpc_clnt_sigunmask(struct rpc_clnt *clnt, sigset_t *oldset);
 130 void            rpc_setbufsize(struct rpc_clnt *, unsigned int, unsigned int);
 131 size_t          rpc_max_payload(struct rpc_clnt *);
 132
 133 static __inline__
 134 int rpc_call(struct rpc_clnt *clnt, u32 proc, void *argp, void *resp, int flags)
 135 {
 136         struct rpc_message msg = {
 137                 .rpc_proc       = &clnt->cl_procinfo[proc],
 138                 .rpc_argp       = argp,
 139                 .rpc_resp       = resp,
 140                 .rpc_cred       = NULL
 141         };
 142         return rpc_call_sync(clnt, &msg, flags);
 143 }
 144
 145 extern void rpciod_wake_up(void);
 146
 147 /*
 148  * Helper function for NFSroot support
 149  */
 150 int             rpc_getport_external(struct sockaddr_in *, __u32, __u32, int);
 151
 152 #endif /* __KERNEL__ */
 153 #endif /* _LINUX_SUNRPC_CLNT_H */