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/socket.h>
  13 #include <linux/in.h>
  14 #include <linux/in6.h>
  15
  16 #include <linux/sunrpc/msg_prot.h>
  17 #include <linux/sunrpc/sched.h>
  18 #include <linux/sunrpc/xprt.h>
  19 #include <linux/sunrpc/auth.h>
  20 #include <linux/sunrpc/stats.h>
  21 #include <linux/sunrpc/xdr.h>
  22 #include <linux/sunrpc/timer.h>
  23 #include <asm/signal.h>
  24 #include <linux/path.h>
  25
  26 struct rpc_inode;
  27
  28 /*
  29  * The high-level client handle
  30  */
  31 struct rpc_clnt {
  32         struct kref             cl_kref;        /* Number of references */
  33         struct list_head        cl_clients;     /* Global list of clients */
  34         struct list_head        cl_tasks;       /* List of tasks */
  35         spinlock_t              cl_lock;        /* spinlock */
  36         struct rpc_xprt *       cl_xprt;        /* transport */
  37         struct rpc_procinfo *   cl_procinfo;    /* procedure info */
  38         u32                     cl_prog,        /* RPC program number */
  39                                 cl_vers,        /* RPC version number */
  40                                 cl_maxproc;     /* max procedure number */
  41
  42         char *                  cl_server;      /* server machine name */
  43         char *                  cl_protname;    /* protocol name */
  44         struct rpc_auth *       cl_auth;        /* authenticator */
  45         struct rpc_stat *       cl_stats;       /* per-program statistics */
  46         struct rpc_iostats *    cl_metrics;     /* per-client statistics */
  47
  48         unsigned int            cl_softrtry : 1,/* soft timeouts */
  49                                 cl_discrtry : 1,/* disconnect before retry */
  50                                 cl_autobind : 1,/* use getport() */
  51                                 cl_chatty   : 1;/* be verbose */
  52
  53         struct rpc_rtt *        cl_rtt;         /* RTO estimator data */
  54         const struct rpc_timeout *cl_timeout;   /* Timeout strategy */
  55
  56         int                     cl_nodelen;     /* nodename length */
  57         char                    cl_nodename[UNX_MAXNODENAME];
  58         struct path             cl_path;
  59         struct rpc_clnt *       cl_parent;      /* Points to parent of clones */
  60         struct rpc_rtt          cl_rtt_default;
  61         struct rpc_timeout      cl_timeout_default;
  62         struct rpc_program *    cl_program;
  63         char                    cl_inline_name[32];
  64         char                    *cl_principal;  /* target to authenticate to */
  65 };
  66
  67 /*
  68  * General RPC program info
  69  */
  70 #define RPC_MAXVERSION          4
  71 struct rpc_program {
  72         char *                  name;           /* protocol name */
  73         u32                     number;         /* program number */
  74         unsigned int            nrvers;         /* number of versions */
  75         struct rpc_version **   version;        /* version array */
  76         struct rpc_stat *       stats;          /* statistics */
  77         char *                  pipe_dir_name;  /* path to rpc_pipefs dir */
  78 };
  79
  80 struct rpc_version {
  81         u32                     number;         /* version number */
  82         unsigned int            nrprocs;        /* number of procs */
  83         struct rpc_procinfo *   procs;          /* procedure array */
  84 };
  85
  86 /*
  87  * Procedure information
  88  */
  89 struct rpc_procinfo {
  90         u32                     p_proc;         /* RPC procedure number */
  91         kxdrproc_t              p_encode;       /* XDR encode function */
  92         kxdrproc_t              p_decode;       /* XDR decode function */
  93         unsigned int            p_arglen;       /* argument hdr length (u32) */
  94         unsigned int            p_replen;       /* reply hdr length (u32) */
  95         unsigned int            p_count;        /* call count */
  96         unsigned int            p_timer;        /* Which RTT timer to use */
  97         u32                     p_statidx;      /* Which procedure to account */
  98         char *                  p_name;         /* name of procedure */
  99 };
 100
 101 #ifdef __KERNEL__
 102
 103 struct rpc_create_args {
 104         int                     protocol;
 105         struct sockaddr         *address;
 106         size_t                  addrsize;
 107         struct sockaddr         *saddress;
 108         const struct rpc_timeout *timeout;
 109         char                    *servername;
 110         struct rpc_program      *program;
 111         u32                     prognumber;     /* overrides program->number */
 112         u32                     version;
 113         rpc_authflavor_t        authflavor;
 114         unsigned long           flags;
 115         char                    *client_name;
 116 };
 117
 118 /* Values for "flags" field */
 119 #define RPC_CLNT_CREATE_HARDRTRY        (1UL << 0)
 120 #define RPC_CLNT_CREATE_AUTOBIND        (1UL << 2)
 121 #define RPC_CLNT_CREATE_NONPRIVPORT     (1UL << 3)
 122 #define RPC_CLNT_CREATE_NOPING          (1UL << 4)
 123 #define RPC_CLNT_CREATE_DISCRTRY        (1UL << 5)
 124 #define RPC_CLNT_CREATE_QUIET           (1UL << 6)
 125
 126 struct rpc_clnt *rpc_create(struct rpc_create_args *args);
 127 struct rpc_clnt *rpc_bind_new_program(struct rpc_clnt *,
 128                                 struct rpc_program *, u32);
 129 struct rpc_clnt *rpc_clone_client(struct rpc_clnt *);
 130 void            rpc_shutdown_client(struct rpc_clnt *);
 131 void            rpc_release_client(struct rpc_clnt *);
 132
 133 int             rpcb_register(u32, u32, int, unsigned short);
 134 int             rpcb_v4_register(const u32 program, const u32 version,
 135                                  const struct sockaddr *address,
 136                                  const char *netid);
 137 int             rpcb_getport_sync(struct sockaddr_in *, u32, u32, int);
 138 void            rpcb_getport_async(struct rpc_task *);
 139
 140 void            rpc_call_start(struct rpc_task *);
 141 int             rpc_call_async(struct rpc_clnt *clnt,
 142                                const struct rpc_message *msg, int flags,
 143                                const struct rpc_call_ops *tk_ops,
 144                                void *calldata);
 145 int             rpc_call_sync(struct rpc_clnt *clnt,
 146                               const struct rpc_message *msg, int flags);
 147 struct rpc_task *rpc_call_null(struct rpc_clnt *clnt, struct rpc_cred *cred,
 148                                int flags);
 149 void            rpc_restart_call_prepare(struct rpc_task *);
 150 void            rpc_restart_call(struct rpc_task *);
 151 void            rpc_setbufsize(struct rpc_clnt *, unsigned int, unsigned int);
 152 size_t          rpc_max_payload(struct rpc_clnt *);
 153 void            rpc_force_rebind(struct rpc_clnt *);
 154 size_t          rpc_peeraddr(struct rpc_clnt *, struct sockaddr *, size_t);
 155 const char      *rpc_peeraddr2str(struct rpc_clnt *, enum rpc_display_format_t);
 156
 157 size_t          rpc_ntop(const struct sockaddr *, char *, const size_t);
 158 size_t          rpc_pton(const char *, const size_t,
 159                          struct sockaddr *, const size_t);
 160 char *          rpc_sockaddr2uaddr(const struct sockaddr *);
 161 size_t          rpc_uaddr2sockaddr(const char *, const size_t,
 162                                    struct sockaddr *, const size_t);
 163
 164 static inline unsigned short rpc_get_port(const struct sockaddr *sap)
 165 {
 166         switch (sap->sa_family) {
 167         case AF_INET:
 168                 return ntohs(((struct sockaddr_in *)sap)->sin_port);
 169         case AF_INET6:
 170                 return ntohs(((struct sockaddr_in6 *)sap)->sin6_port);
 171         }
 172         return 0;
 173 }
 174
 175 static inline void rpc_set_port(struct sockaddr *sap,
 176                                 const unsigned short port)
 177 {
 178         switch (sap->sa_family) {
 179         case AF_INET:
 180                 ((struct sockaddr_in *)sap)->sin_port = htons(port);
 181                 break;
 182         case AF_INET6:
 183                 ((struct sockaddr_in6 *)sap)->sin6_port = htons(port);
 184                 break;
 185         }
 186 }
 187
 188 #define IPV6_SCOPE_DELIMITER            '%'
 189 #define IPV6_SCOPE_ID_LEN               sizeof("%nnnnnnnnnn")
 190
 191 #endif /* __KERNEL__ */
 192 #endif /* _LINUX_SUNRPC_CLNT_H */