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/types.h>
  13 #include <linux/socket.h>
  14 #include <linux/in.h>
  15 #include <linux/in6.h>
  16
  17 #include <linux/sunrpc/msg_prot.h>
  18 #include <linux/sunrpc/sched.h>
  19 #include <linux/sunrpc/xprt.h>
  20 #include <linux/sunrpc/auth.h>
  21 #include <linux/sunrpc/stats.h>
  22 #include <linux/sunrpc/xdr.h>
  23 #include <linux/sunrpc/timer.h>
  24 #include <linux/sunrpc/rpc_pipe_fs.h>
  25 #include <asm/signal.h>
  26 #include <linux/path.h>
  27 #include <net/ipv6.h>
  28
  29 struct rpc_inode;
  30
  31 /*
  32  * The high-level client handle
  33  */
  34 struct rpc_clnt {
  35         atomic_t                cl_count;       /* Number of references */
  36         unsigned int            cl_clid;        /* client id */
  37         struct list_head        cl_clients;     /* Global list of clients */
  38         struct list_head        cl_tasks;       /* List of tasks */
  39         spinlock_t              cl_lock;        /* spinlock */
  40         struct rpc_xprt __rcu * cl_xprt;        /* transport */
  41         struct rpc_procinfo *   cl_procinfo;    /* procedure info */
  42         u32                     cl_prog,        /* RPC program number */
  43                                 cl_vers,        /* RPC version number */
  44                                 cl_maxproc;     /* max procedure number */
  45
  46         struct rpc_auth *       cl_auth;        /* authenticator */
  47         struct rpc_stat *       cl_stats;       /* per-program statistics */
  48         struct rpc_iostats *    cl_metrics;     /* per-client statistics */
  49
  50         unsigned int            cl_softrtry : 1,/* soft timeouts */
  51                                 cl_discrtry : 1,/* disconnect before retry */
  52                                 cl_noretranstimeo: 1,/* No retransmit timeouts */
  53                                 cl_autobind : 1,/* use getport() */
  54                                 cl_chatty   : 1;/* be verbose */
  55
  56         struct rpc_rtt *        cl_rtt;         /* RTO estimator data */
  57         const struct rpc_timeout *cl_timeout;   /* Timeout strategy */
  58
  59         atomic_t                cl_swapper;     /* swapfile count */
  60         int                     cl_nodelen;     /* nodename length */
  61         char                    cl_nodename[UNX_MAXNODENAME+1];
  62         struct rpc_pipe_dir_head cl_pipedir_objects;
  63         struct rpc_clnt *       cl_parent;      /* Points to parent of clones */
  64         struct rpc_rtt          cl_rtt_default;
  65         struct rpc_timeout      cl_timeout_default;
  66         const struct rpc_program *cl_program;
  67 #if IS_ENABLED(CONFIG_SUNRPC_DEBUG)
  68         struct dentry           *cl_debugfs;    /* debugfs directory */
  69 #endif
  70 };
  71
  72 /*
  73  * General RPC program info
  74  */
  75 #define RPC_MAXVERSION          4
  76 struct rpc_program {
  77         const char *            name;           /* protocol name */
  78         u32                     number;         /* program number */
  79         unsigned int            nrvers;         /* number of versions */
  80         const struct rpc_version **     version;        /* version array */
  81         struct rpc_stat *       stats;          /* statistics */
  82         const char *            pipe_dir_name;  /* path to rpc_pipefs dir */
  83 };
  84
  85 struct rpc_version {
  86         u32                     number;         /* version number */
  87         unsigned int            nrprocs;        /* number of procs */
  88         struct rpc_procinfo *   procs;          /* procedure array */
  89 };
  90
  91 /*
  92  * Procedure information
  93  */
  94 struct rpc_procinfo {
  95         u32                     p_proc;         /* RPC procedure number */
  96         kxdreproc_t             p_encode;       /* XDR encode function */
  97         kxdrdproc_t             p_decode;       /* XDR decode function */
  98         unsigned int            p_arglen;       /* argument hdr length (u32) */
  99         unsigned int            p_replen;       /* reply hdr length (u32) */
 100         unsigned int            p_count;        /* call count */
 101         unsigned int            p_timer;        /* Which RTT timer to use */
 102         u32                     p_statidx;      /* Which procedure to account */
 103         const char *            p_name;         /* name of procedure */
 104 };
 105
 106 #ifdef __KERNEL__
 107
 108 struct rpc_create_args {
 109         struct net              *net;
 110         int                     protocol;
 111         struct sockaddr         *address;
 112         size_t                  addrsize;
 113         struct sockaddr         *saddress;
 114         const struct rpc_timeout *timeout;
 115         const char              *servername;
 116         const char              *nodename;
 117         const struct rpc_program *program;
 118         u32                     prognumber;     /* overrides program->number */
 119         u32                     version;
 120         rpc_authflavor_t        authflavor;
 121         unsigned long           flags;
 122         char                    *client_name;
 123         struct svc_xprt         *bc_xprt;       /* NFSv4.1 backchannel */
 124 };
 125
 126 /* Values for "flags" field */
 127 #define RPC_CLNT_CREATE_HARDRTRY        (1UL << 0)
 128 #define RPC_CLNT_CREATE_AUTOBIND        (1UL << 2)
 129 #define RPC_CLNT_CREATE_NONPRIVPORT     (1UL << 3)
 130 #define RPC_CLNT_CREATE_NOPING          (1UL << 4)
 131 #define RPC_CLNT_CREATE_DISCRTRY        (1UL << 5)
 132 #define RPC_CLNT_CREATE_QUIET           (1UL << 6)
 133 #define RPC_CLNT_CREATE_INFINITE_SLOTS  (1UL << 7)
 134 #define RPC_CLNT_CREATE_NO_IDLE_TIMEOUT (1UL << 8)
 135 #define RPC_CLNT_CREATE_NO_RETRANS_TIMEOUT      (1UL << 9)
 136
 137 struct rpc_clnt *rpc_create(struct rpc_create_args *args);
 138 struct rpc_clnt *rpc_create_xprt(struct rpc_create_args *args,
 139                                         struct rpc_xprt *xprt);
 140 struct rpc_clnt *rpc_bind_new_program(struct rpc_clnt *,
 141                                 const struct rpc_program *, u32);
 142 void rpc_task_reset_client(struct rpc_task *task, struct rpc_clnt *clnt);
 143 struct rpc_clnt *rpc_clone_client(struct rpc_clnt *);
 144 struct rpc_clnt *rpc_clone_client_set_auth(struct rpc_clnt *,
 145                                 rpc_authflavor_t);
 146 int             rpc_switch_client_transport(struct rpc_clnt *,
 147                                 struct xprt_create *,
 148                                 const struct rpc_timeout *);
 149
 150 void            rpc_shutdown_client(struct rpc_clnt *);
 151 void            rpc_release_client(struct rpc_clnt *);
 152 void            rpc_task_release_client(struct rpc_task *);
 153
 154 int             rpcb_create_local(struct net *);
 155 void            rpcb_put_local(struct net *);
 156 int             rpcb_register(struct net *, u32, u32, int, unsigned short);
 157 int             rpcb_v4_register(struct net *net, const u32 program,
 158                                  const u32 version,
 159                                  const struct sockaddr *address,
 160                                  const char *netid);
 161 void            rpcb_getport_async(struct rpc_task *);
 162
 163 void            rpc_call_start(struct rpc_task *);
 164 int             rpc_call_async(struct rpc_clnt *clnt,
 165                                const struct rpc_message *msg, int flags,
 166                                const struct rpc_call_ops *tk_ops,
 167                                void *calldata);
 168 int             rpc_call_sync(struct rpc_clnt *clnt,
 169                               const struct rpc_message *msg, int flags);
 170 struct rpc_task *rpc_call_null(struct rpc_clnt *clnt, struct rpc_cred *cred,
 171                                int flags);
 172 int             rpc_restart_call_prepare(struct rpc_task *);
 173 int             rpc_restart_call(struct rpc_task *);
 174 void            rpc_setbufsize(struct rpc_clnt *, unsigned int, unsigned int);
 175 int             rpc_protocol(struct rpc_clnt *);
 176 struct net *    rpc_net_ns(struct rpc_clnt *);
 177 size_t          rpc_max_payload(struct rpc_clnt *);
 178 unsigned long   rpc_get_timeout(struct rpc_clnt *clnt);
 179 void            rpc_force_rebind(struct rpc_clnt *);
 180 size_t          rpc_peeraddr(struct rpc_clnt *, struct sockaddr *, size_t);
 181 const char      *rpc_peeraddr2str(struct rpc_clnt *, enum rpc_display_format_t);
 182 int             rpc_localaddr(struct rpc_clnt *, struct sockaddr *, size_t);
 183
 184 const char *rpc_proc_name(const struct rpc_task *task);
 185 #endif /* __KERNEL__ */
 186 #endif /* _LINUX_SUNRPC_CLNT_H */