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  * SPDX-License-Identifier: BSD-3-Clause
    3  *
    4  * Copyright (c) 2009, Sun Microsystems, Inc.
    5  * All rights reserved.
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions are met:
    9  * - Redistributions of source code must retain the above copyright notice,
   10  *   this list of conditions and the following disclaimer.
   11  * - Redistributions in binary form must reproduce the above copyright notice,
   12  *   this list of conditions and the following disclaimer in the documentation
   13  *   and/or other materials provided with the distribution.
   14  * - Neither the name of Sun Microsystems, Inc. nor the names of its
   15  *   contributors may be used to endorse or promote products derived
   16  *   from this software without specific prior written permission.
   17  *
   18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
   19  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   20  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   21  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
   22  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR   
   23  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   24  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   25  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   26  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   27  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   28  * POSSIBILITY OF SUCH DAMAGE.
   29  *
   30  * $FreeBSD$
   31  */
   32 
   33 #ifndef _RPC_KRPC_H_
   34 #define _RPC_KRPC_H_
   35 
   36 #ifdef _KERNEL
   37 /*
   38  * Definitions now shared between client and server RPC for backchannels.
   39  */
   40 #define MCALL_MSG_SIZE 24
   41 
   42 void clnt_bck_svccall(void *, struct mbuf *, uint32_t);
   43 enum clnt_stat clnt_bck_call(CLIENT *, struct rpc_callextra *, rpcproc_t,
   44     struct mbuf *, struct mbuf **, struct timeval, SVCXPRT *);
   45 struct mbuf *_rpc_copym_into_ext_pgs(struct mbuf *, int);
   46 
   47 /*
   48  * A pending RPC request which awaits a reply. Requests which have
   49  * received their reply will have cr_xid set to zero and cr_mrep to
   50  * the mbuf chain of the reply.
   51  */
   52 struct ct_request {
   53         TAILQ_ENTRY(ct_request) cr_link;
   54         uint32_t                cr_xid;         /* XID of request */
   55         struct mbuf             *cr_mrep;       /* reply received by upcall */
   56         int                     cr_error;       /* any error from upcall */
   57         char                    cr_verf[MAX_AUTH_BYTES]; /* reply verf */
   58 };
   59 
   60 TAILQ_HEAD(ct_request_list, ct_request);
   61 
   62 struct rc_data {
   63         struct mtx              rc_lock;
   64         struct sockaddr_storage rc_addr; /* server address */
   65         struct netconfig*       rc_nconf; /* network type */
   66         rpcprog_t               rc_prog;  /* program number */
   67         rpcvers_t               rc_vers;  /* version number */
   68         size_t                  rc_sendsz;
   69         size_t                  rc_recvsz;
   70         struct timeval          rc_timeout;
   71         struct timeval          rc_retry;
   72         int                     rc_retries;
   73         int                     rc_privport;
   74         char                    *rc_waitchan;
   75         int                     rc_intr;
   76         int                     rc_connecting;
   77         int                     rc_closed;
   78         struct ucred            *rc_ucred;
   79         CLIENT*                 rc_client; /* underlying RPC client */
   80         struct rpc_err          rc_err;
   81         void                    *rc_backchannel;
   82         bool                    rc_tls; /* Enable TLS on connection */
   83         char                    *rc_tlscertname;
   84         void                    (*rc_reconcall)(CLIENT *, void *,
   85                                     struct ucred *); /* reconection upcall */
   86         void                    *rc_reconarg;   /* upcall arg */
   87 };
   88 
   89 /* Bits for ct_rcvstate. */
   90 #define RPCRCVSTATE_NORMAL              0x01    /* Normal reception. */
   91 #define RPCRCVSTATE_NONAPPDATA          0x02    /* Reception of a non-application record. */
   92 #define RPCRCVSTATE_TLSHANDSHAKE        0x04    /* Reception blocked for TLS handshake. */
   93 #define RPCRCVSTATE_UPCALLNEEDED        0x08    /* Upcall to rpctlscd needed. */
   94 #define RPCRCVSTATE_UPCALLINPROG        0x10    /* Upcall to rpctlscd in progress. */
   95 #define RPCRCVSTATE_SOUPCALLNEEDED      0x20    /* Socket upcall needed. */
   96 #define RPCRCVSTATE_UPCALLTHREAD        0x40    /* Upcall kthread running. */
   97 
   98 struct ct_data {
   99         struct mtx      ct_lock;
  100         int             ct_threads;     /* number of threads in clnt_vc_call */
  101         bool_t          ct_closing;     /* TRUE if we are closing */
  102         bool_t          ct_closed;      /* TRUE if we are closed */
  103         struct socket   *ct_socket;     /* connection socket */
  104         bool_t          ct_closeit;     /* close it on destroy */
  105         struct timeval  ct_wait;        /* wait interval in milliseconds */
  106         struct sockaddr_storage ct_addr; /* remote addr */
  107         struct rpc_err  ct_error;
  108         uint32_t        ct_xid;
  109         char            ct_mcallc[MCALL_MSG_SIZE]; /* marshalled callmsg */
  110         size_t          ct_mpos;        /* pos after marshal */
  111         const char      *ct_waitchan;
  112         int             ct_waitflag;
  113         struct mbuf     *ct_record;     /* current reply record */
  114         size_t          ct_record_resid; /* how much left of reply to read */
  115         bool_t          ct_record_eor;   /* true if reading last fragment */
  116         struct ct_request_list ct_pending;
  117         int             ct_upcallrefs;  /* Ref cnt of upcalls in prog. */
  118         SVCXPRT         *ct_backchannelxprt; /* xprt for backchannel */
  119         uint64_t        ct_sslsec;      /* RPC-over-TLS connection. */
  120         uint64_t        ct_sslusec;
  121         uint64_t        ct_sslrefno;
  122         uint32_t        ct_rcvstate;    /* Handle receiving for TLS upcalls */
  123         struct mbuf     *ct_raw;        /* Raw mbufs recv'd */
  124 };
  125 
  126 struct cf_conn {  /* kept in xprt->xp_p1 for actual connection */
  127         enum xprt_stat strm_stat;
  128         struct mbuf *mpending;  /* unparsed data read from the socket */
  129         struct mbuf *mreq;      /* current record being built from mpending */
  130         uint32_t resid;         /* number of bytes needed for fragment */
  131         bool_t eor;             /* reading last fragment of current record */
  132 };
  133 
  134 #endif  /* _KERNEL */
  135 
  136 #endif  /* _RPC_KRPC_H_ */

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