The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/rpc/krpc.h

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    1 /*-
    2  * Copyright (c) 2009, Sun Microsystems, Inc.
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions are met:
    7  * - Redistributions of source code must retain the above copyright notice,
    8  *   this list of conditions and the following disclaimer.
    9  * - Redistributions in binary form must reproduce the above copyright notice,
   10  *   this list of conditions and the following disclaimer in the documentation
   11  *   and/or other materials provided with the distribution.
   12  * - Neither the name of Sun Microsystems, Inc. nor the names of its
   13  *   contributors may be used to endorse or promote products derived
   14  *   from this software without specific prior written permission.
   15  *
   16  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
   17  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   19  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
   20  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR   
   21  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   22  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   23  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   24  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   25  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   26  * POSSIBILITY OF SUCH DAMAGE.
   27  *
   28  * $FreeBSD: stable/11/sys/rpc/krpc.h 331722 2018-03-29 02:50:57Z eadler $
   29  */
   30 
   31 #ifndef _RPC_KRPC_H_
   32 #define _RPC_KRPC_H_
   33 
   34 #ifdef _KERNEL
   35 /*
   36  * Definitions now shared between client and server RPC for backchannels.
   37  */
   38 #define MCALL_MSG_SIZE 24
   39 
   40 void clnt_bck_svccall(void *, struct mbuf *, uint32_t);
   41 enum clnt_stat clnt_bck_call(CLIENT *, struct rpc_callextra *, rpcproc_t,
   42     struct mbuf *, struct mbuf **, struct timeval, SVCXPRT *);
   43 
   44 /*
   45  * A pending RPC request which awaits a reply. Requests which have
   46  * received their reply will have cr_xid set to zero and cr_mrep to
   47  * the mbuf chain of the reply.
   48  */
   49 struct ct_request {
   50         TAILQ_ENTRY(ct_request) cr_link;
   51         uint32_t                cr_xid;         /* XID of request */
   52         struct mbuf             *cr_mrep;       /* reply received by upcall */
   53         int                     cr_error;       /* any error from upcall */
   54         char                    cr_verf[MAX_AUTH_BYTES]; /* reply verf */
   55 };
   56 
   57 TAILQ_HEAD(ct_request_list, ct_request);
   58 
   59 struct rc_data {
   60         struct mtx              rc_lock;
   61         struct sockaddr_storage rc_addr; /* server address */
   62         struct netconfig*       rc_nconf; /* network type */
   63         rpcprog_t               rc_prog;  /* program number */
   64         rpcvers_t               rc_vers;  /* version number */
   65         size_t                  rc_sendsz;
   66         size_t                  rc_recvsz;
   67         struct timeval          rc_timeout;
   68         struct timeval          rc_retry;
   69         int                     rc_retries;
   70         int                     rc_privport;
   71         char                    *rc_waitchan;
   72         int                     rc_intr;
   73         int                     rc_connecting;
   74         int                     rc_closed;
   75         struct ucred            *rc_ucred;
   76         CLIENT*                 rc_client; /* underlying RPC client */
   77         struct rpc_err          rc_err;
   78         void                    *rc_backchannel;
   79 };
   80 
   81 struct ct_data {
   82         struct mtx      ct_lock;
   83         int             ct_threads;     /* number of threads in clnt_vc_call */
   84         bool_t          ct_closing;     /* TRUE if we are closing */
   85         bool_t          ct_closed;      /* TRUE if we are closed */
   86         struct socket   *ct_socket;     /* connection socket */
   87         bool_t          ct_closeit;     /* close it on destroy */
   88         struct timeval  ct_wait;        /* wait interval in milliseconds */
   89         struct sockaddr_storage ct_addr; /* remote addr */
   90         struct rpc_err  ct_error;
   91         uint32_t        ct_xid;
   92         char            ct_mcallc[MCALL_MSG_SIZE]; /* marshalled callmsg */
   93         size_t          ct_mpos;        /* pos after marshal */
   94         const char      *ct_waitchan;
   95         int             ct_waitflag;
   96         struct mbuf     *ct_record;     /* current reply record */
   97         size_t          ct_record_resid; /* how much left of reply to read */
   98         bool_t          ct_record_eor;   /* true if reading last fragment */
   99         struct ct_request_list ct_pending;
  100         int             ct_upcallrefs;  /* Ref cnt of upcalls in prog. */
  101         SVCXPRT         *ct_backchannelxprt; /* xprt for backchannel */
  102 };
  103 
  104 struct cf_conn {  /* kept in xprt->xp_p1 for actual connection */
  105         enum xprt_stat strm_stat;
  106         struct mbuf *mpending;  /* unparsed data read from the socket */
  107         struct mbuf *mreq;      /* current record being built from mpending */
  108         uint32_t resid;         /* number of bytes needed for fragment */
  109         bool_t eor;             /* reading last fragment of current record */
  110 };
  111 
  112 #endif  /* _KERNEL */
  113 
  114 #endif  /* _RPC_KRPC_H_ */

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