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 struct rpc_inode;
  22
  23 /*
  24  * The high-level client handle
  25  */
  26 struct rpc_clnt {
  27         struct kref             cl_kref;        /* Number of references */
  28         struct list_head        cl_clients;     /* Global list of clients */
  29         struct list_head        cl_tasks;       /* List of tasks */
  30         spinlock_t              cl_lock;        /* spinlock */
  31         struct rpc_xprt *       cl_xprt;        /* transport */
  32         struct rpc_procinfo *   cl_procinfo;    /* procedure info */
  33         u32                     cl_prog,        /* RPC program number */
  34                                 cl_vers,        /* RPC version number */
  35                                 cl_maxproc;     /* max procedure number */
  36
  37         char *                  cl_server;      /* server machine name */
  38         char *                  cl_protname;    /* protocol name */
  39         struct rpc_auth *       cl_auth;        /* authenticator */
  40         struct rpc_stat *       cl_stats;       /* per-program statistics */
  41         struct rpc_iostats *    cl_metrics;     /* per-client statistics */
  42
  43         unsigned int            cl_softrtry : 1,/* soft timeouts */
  44                                 cl_discrtry : 1,/* disconnect before retry */
  45                                 cl_autobind : 1,/* use getport() */
  46                                 cl_chatty   : 1;/* be verbose */
  47
  48         struct rpc_rtt *        cl_rtt;         /* RTO estimator data */
  49         const struct rpc_timeout *cl_timeout;   /* Timeout strategy */
  50
  51         int                     cl_nodelen;     /* nodename length */
  52         char                    cl_nodename[UNX_MAXNODENAME];
  53         char                    cl_pathname[30];/* Path in rpc_pipe_fs */
  54         struct vfsmount *       cl_vfsmnt;
  55         struct dentry *         cl_dentry;      /* inode */
  56         struct rpc_clnt *       cl_parent;      /* Points to parent of clones */
  57         struct rpc_rtt          cl_rtt_default;
  58         struct rpc_timeout      cl_timeout_default;
  59         struct rpc_program *    cl_program;
  60         char                    cl_inline_name[32];
  61         char                    *cl_principal;  /* target to authenticate to */
  62 };
  63
  64 /*
  65  * General RPC program info
  66  */
  67 #define RPC_MAXVERSION          4
  68 struct rpc_program {
  69         char *                  name;           /* protocol name */
  70         u32                     number;         /* program number */
  71         unsigned int            nrvers;         /* number of versions */
  72         struct rpc_version **   version;        /* version array */
  73         struct rpc_stat *       stats;          /* statistics */
  74         char *                  pipe_dir_name;  /* path to rpc_pipefs dir */
  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         u32                     p_proc;         /* RPC procedure number */
  88         kxdrproc_t              p_encode;       /* XDR encode function */
  89         kxdrproc_t              p_decode;       /* XDR decode function */
  90         unsigned int            p_arglen;       /* argument hdr length (u32) */
  91         unsigned int            p_replen;       /* reply hdr length (u32) */
  92         unsigned int            p_count;        /* call count */
  93         unsigned int            p_timer;        /* Which RTT timer to use */
  94         u32                     p_statidx;      /* Which procedure to account */
  95         char *                  p_name;         /* name of procedure */
  96 };
  97
  98 #ifdef __KERNEL__
  99
 100 struct rpc_create_args {
 101         int                     protocol;
 102         struct sockaddr         *address;
 103         size_t                  addrsize;
 104         struct sockaddr         *saddress;
 105         const struct rpc_timeout *timeout;
 106         char                    *servername;
 107         struct rpc_program      *program;
 108         u32                     prognumber;     /* overrides program->number */
 109         u32                     version;
 110         rpc_authflavor_t        authflavor;
 111         unsigned long           flags;
 112         char                    *client_name;
 113 };
 114
 115 /* Values for "flags" field */
 116 #define RPC_CLNT_CREATE_HARDRTRY        (1UL << 0)
 117 #define RPC_CLNT_CREATE_AUTOBIND        (1UL << 2)
 118 #define RPC_CLNT_CREATE_NONPRIVPORT     (1UL << 3)
 119 #define RPC_CLNT_CREATE_NOPING          (1UL << 4)
 120 #define RPC_CLNT_CREATE_DISCRTRY        (1UL << 5)
 121 #define RPC_CLNT_CREATE_QUIET           (1UL << 6)
 122
 123 struct rpc_clnt *rpc_create(struct rpc_create_args *args);
 124 struct rpc_clnt *rpc_bind_new_program(struct rpc_clnt *,
 125                                 struct rpc_program *, u32);
 126 struct rpc_clnt *rpc_clone_client(struct rpc_clnt *);
 127 void            rpc_shutdown_client(struct rpc_clnt *);
 128 void            rpc_release_client(struct rpc_clnt *);
 129
 130 int             rpcb_register(u32, u32, int, unsigned short);
 131 int             rpcb_v4_register(const u32 program, const u32 version,
 132                                  const struct sockaddr *address,
 133                                  const char *netid);
 134 int             rpcb_getport_sync(struct sockaddr_in *, u32, u32, int);
 135 void            rpcb_getport_async(struct rpc_task *);
 136
 137 void            rpc_call_start(struct rpc_task *);
 138 int             rpc_call_async(struct rpc_clnt *clnt,
 139                                const struct rpc_message *msg, int flags,
 140                                const struct rpc_call_ops *tk_ops,
 141                                void *calldata);
 142 int             rpc_call_sync(struct rpc_clnt *clnt,
 143                               const struct rpc_message *msg, int flags);
 144 struct rpc_task *rpc_call_null(struct rpc_clnt *clnt, struct rpc_cred *cred,
 145                                int flags);
 146 void            rpc_restart_call_prepare(struct rpc_task *);
 147 void            rpc_restart_call(struct rpc_task *);
 148 void            rpc_setbufsize(struct rpc_clnt *, unsigned int, unsigned int);
 149 size_t          rpc_max_payload(struct rpc_clnt *);
 150 void            rpc_force_rebind(struct rpc_clnt *);
 151 size_t          rpc_peeraddr(struct rpc_clnt *, struct sockaddr *, size_t);
 152 const char      *rpc_peeraddr2str(struct rpc_clnt *, enum rpc_display_format_t);
 153
 154 #endif /* __KERNEL__ */
 155 #endif /* _LINUX_SUNRPC_CLNT_H */