4736ccfd9c
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1082 lines
27 KiB
C
1082 lines
27 KiB
C
/* $NetBSD: clnt_vc.c,v 1.4 2000/07/14 08:40:42 fvdl Exp $ */
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/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 2009, Sun Microsystems, Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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* - Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* - Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* - Neither the name of Sun Microsystems, Inc. nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#if defined(LIBC_SCCS) && !defined(lint)
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static char *sccsid2 = "@(#)clnt_tcp.c 1.37 87/10/05 Copyr 1984 Sun Micro";
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static char *sccsid = "@(#)clnt_tcp.c 2.2 88/08/01 4.0 RPCSRC";
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static char sccsid3[] = "@(#)clnt_vc.c 1.19 89/03/16 Copyr 1988 Sun Micro";
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#endif
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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/*
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* clnt_tcp.c, Implements a TCP/IP based, client side RPC.
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*
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* Copyright (C) 1984, Sun Microsystems, Inc.
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*
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* TCP based RPC supports 'batched calls'.
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* A sequence of calls may be batched-up in a send buffer. The rpc call
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* return immediately to the client even though the call was not necessarily
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* sent. The batching occurs if the results' xdr routine is NULL (0) AND
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* the rpc timeout value is zero (see clnt.h, rpc).
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*
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* Clients should NOT casually batch calls that in fact return results; that is,
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* the server side should be aware that a call is batched and not produce any
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* return message. Batched calls that produce many result messages can
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* deadlock (netlock) the client and the server....
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*
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* Now go hang yourself.
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/lock.h>
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#include <sys/malloc.h>
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#include <sys/mbuf.h>
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#include <sys/mutex.h>
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#include <sys/pcpu.h>
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#include <sys/proc.h>
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#include <sys/protosw.h>
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#include <sys/socket.h>
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#include <sys/socketvar.h>
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#include <sys/sx.h>
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#include <sys/syslog.h>
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#include <sys/time.h>
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#include <sys/uio.h>
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#include <net/vnet.h>
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#include <netinet/tcp.h>
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#include <rpc/rpc.h>
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#include <rpc/rpc_com.h>
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#include <rpc/krpc.h>
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struct cmessage {
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struct cmsghdr cmsg;
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struct cmsgcred cmcred;
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};
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static enum clnt_stat clnt_vc_call(CLIENT *, struct rpc_callextra *,
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rpcproc_t, struct mbuf *, struct mbuf **, struct timeval);
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static void clnt_vc_geterr(CLIENT *, struct rpc_err *);
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static bool_t clnt_vc_freeres(CLIENT *, xdrproc_t, void *);
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static void clnt_vc_abort(CLIENT *);
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static bool_t clnt_vc_control(CLIENT *, u_int, void *);
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static void clnt_vc_close(CLIENT *);
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static void clnt_vc_destroy(CLIENT *);
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static bool_t time_not_ok(struct timeval *);
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static int clnt_vc_soupcall(struct socket *so, void *arg, int waitflag);
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static struct clnt_ops clnt_vc_ops = {
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.cl_call = clnt_vc_call,
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.cl_abort = clnt_vc_abort,
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.cl_geterr = clnt_vc_geterr,
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.cl_freeres = clnt_vc_freeres,
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.cl_close = clnt_vc_close,
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.cl_destroy = clnt_vc_destroy,
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.cl_control = clnt_vc_control
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};
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static void clnt_vc_upcallsdone(struct ct_data *);
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static int fake_wchan;
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/*
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* Create a client handle for a connection.
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* Default options are set, which the user can change using clnt_control()'s.
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* The rpc/vc package does buffering similar to stdio, so the client
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* must pick send and receive buffer sizes, 0 => use the default.
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* NB: fd is copied into a private area.
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* NB: The rpch->cl_auth is set null authentication. Caller may wish to
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* set this something more useful.
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*
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* fd should be an open socket
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*/
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CLIENT *
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clnt_vc_create(
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struct socket *so, /* open file descriptor */
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struct sockaddr *raddr, /* servers address */
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const rpcprog_t prog, /* program number */
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const rpcvers_t vers, /* version number */
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size_t sendsz, /* buffer recv size */
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size_t recvsz, /* buffer send size */
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int intrflag) /* interruptible */
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{
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CLIENT *cl; /* client handle */
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struct ct_data *ct = NULL; /* client handle */
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struct timeval now;
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struct rpc_msg call_msg;
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static uint32_t disrupt;
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struct __rpc_sockinfo si;
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XDR xdrs;
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int error, interrupted, one = 1, sleep_flag;
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struct sockopt sopt;
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if (disrupt == 0)
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disrupt = (uint32_t)(long)raddr;
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cl = (CLIENT *)mem_alloc(sizeof (*cl));
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ct = (struct ct_data *)mem_alloc(sizeof (*ct));
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mtx_init(&ct->ct_lock, "ct->ct_lock", NULL, MTX_DEF);
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ct->ct_threads = 0;
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ct->ct_closing = FALSE;
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ct->ct_closed = FALSE;
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ct->ct_upcallrefs = 0;
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if ((so->so_state & (SS_ISCONNECTED|SS_ISCONFIRMING)) == 0) {
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error = soconnect(so, raddr, curthread);
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SOCK_LOCK(so);
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interrupted = 0;
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sleep_flag = PSOCK;
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if (intrflag != 0)
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sleep_flag |= PCATCH;
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while ((so->so_state & SS_ISCONNECTING)
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&& so->so_error == 0) {
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error = msleep(&so->so_timeo, SOCK_MTX(so),
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sleep_flag, "connec", 0);
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if (error) {
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if (error == EINTR || error == ERESTART)
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interrupted = 1;
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break;
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}
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}
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if (error == 0) {
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error = so->so_error;
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so->so_error = 0;
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}
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SOCK_UNLOCK(so);
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if (error) {
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if (!interrupted)
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so->so_state &= ~SS_ISCONNECTING;
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rpc_createerr.cf_stat = RPC_SYSTEMERROR;
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rpc_createerr.cf_error.re_errno = error;
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goto err;
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}
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}
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if (!__rpc_socket2sockinfo(so, &si)) {
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goto err;
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}
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if (so->so_proto->pr_flags & PR_CONNREQUIRED) {
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bzero(&sopt, sizeof(sopt));
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sopt.sopt_dir = SOPT_SET;
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sopt.sopt_level = SOL_SOCKET;
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sopt.sopt_name = SO_KEEPALIVE;
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sopt.sopt_val = &one;
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sopt.sopt_valsize = sizeof(one);
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sosetopt(so, &sopt);
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}
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if (so->so_proto->pr_protocol == IPPROTO_TCP) {
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bzero(&sopt, sizeof(sopt));
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sopt.sopt_dir = SOPT_SET;
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sopt.sopt_level = IPPROTO_TCP;
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sopt.sopt_name = TCP_NODELAY;
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sopt.sopt_val = &one;
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sopt.sopt_valsize = sizeof(one);
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sosetopt(so, &sopt);
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}
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ct->ct_closeit = FALSE;
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/*
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* Set up private data struct
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*/
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ct->ct_socket = so;
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ct->ct_wait.tv_sec = -1;
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ct->ct_wait.tv_usec = -1;
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memcpy(&ct->ct_addr, raddr, raddr->sa_len);
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/*
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* Initialize call message
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*/
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getmicrotime(&now);
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ct->ct_xid = ((uint32_t)++disrupt) ^ __RPC_GETXID(&now);
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call_msg.rm_xid = ct->ct_xid;
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call_msg.rm_direction = CALL;
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call_msg.rm_call.cb_rpcvers = RPC_MSG_VERSION;
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call_msg.rm_call.cb_prog = (uint32_t)prog;
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call_msg.rm_call.cb_vers = (uint32_t)vers;
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/*
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* pre-serialize the static part of the call msg and stash it away
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*/
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xdrmem_create(&xdrs, ct->ct_mcallc, MCALL_MSG_SIZE,
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XDR_ENCODE);
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if (! xdr_callhdr(&xdrs, &call_msg)) {
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if (ct->ct_closeit) {
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soclose(ct->ct_socket);
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}
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goto err;
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}
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ct->ct_mpos = XDR_GETPOS(&xdrs);
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XDR_DESTROY(&xdrs);
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ct->ct_waitchan = "rpcrecv";
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ct->ct_waitflag = 0;
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/*
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* Create a client handle which uses xdrrec for serialization
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* and authnone for authentication.
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*/
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sendsz = __rpc_get_t_size(si.si_af, si.si_proto, (int)sendsz);
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recvsz = __rpc_get_t_size(si.si_af, si.si_proto, (int)recvsz);
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error = soreserve(ct->ct_socket, sendsz, recvsz);
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if (error != 0) {
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if (ct->ct_closeit) {
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soclose(ct->ct_socket);
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}
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goto err;
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}
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cl->cl_refs = 1;
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cl->cl_ops = &clnt_vc_ops;
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cl->cl_private = ct;
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cl->cl_auth = authnone_create();
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SOCKBUF_LOCK(&ct->ct_socket->so_rcv);
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soupcall_set(ct->ct_socket, SO_RCV, clnt_vc_soupcall, ct);
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SOCKBUF_UNLOCK(&ct->ct_socket->so_rcv);
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ct->ct_record = NULL;
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ct->ct_record_resid = 0;
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TAILQ_INIT(&ct->ct_pending);
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return (cl);
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err:
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mtx_destroy(&ct->ct_lock);
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mem_free(ct, sizeof (struct ct_data));
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mem_free(cl, sizeof (CLIENT));
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return ((CLIENT *)NULL);
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}
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static enum clnt_stat
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clnt_vc_call(
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CLIENT *cl, /* client handle */
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struct rpc_callextra *ext, /* call metadata */
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rpcproc_t proc, /* procedure number */
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struct mbuf *args, /* pointer to args */
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struct mbuf **resultsp, /* pointer to results */
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struct timeval utimeout)
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{
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struct ct_data *ct = (struct ct_data *) cl->cl_private;
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AUTH *auth;
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struct rpc_err *errp;
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enum clnt_stat stat;
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XDR xdrs;
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struct rpc_msg reply_msg;
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bool_t ok;
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int nrefreshes = 2; /* number of times to refresh cred */
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struct timeval timeout;
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uint32_t xid;
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struct mbuf *mreq = NULL, *results;
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struct ct_request *cr;
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int error, trycnt;
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cr = malloc(sizeof(struct ct_request), M_RPC, M_WAITOK);
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mtx_lock(&ct->ct_lock);
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if (ct->ct_closing || ct->ct_closed) {
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mtx_unlock(&ct->ct_lock);
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free(cr, M_RPC);
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return (RPC_CANTSEND);
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}
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ct->ct_threads++;
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if (ext) {
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auth = ext->rc_auth;
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errp = &ext->rc_err;
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} else {
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auth = cl->cl_auth;
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errp = &ct->ct_error;
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}
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cr->cr_mrep = NULL;
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cr->cr_error = 0;
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if (ct->ct_wait.tv_usec == -1) {
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timeout = utimeout; /* use supplied timeout */
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} else {
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timeout = ct->ct_wait; /* use default timeout */
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}
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/*
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* After 15sec of looping, allow it to return RPC_CANTSEND, which will
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* cause the clnt_reconnect layer to create a new TCP connection.
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*/
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trycnt = 15 * hz;
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call_again:
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mtx_assert(&ct->ct_lock, MA_OWNED);
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if (ct->ct_closing || ct->ct_closed) {
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ct->ct_threads--;
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wakeup(ct);
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mtx_unlock(&ct->ct_lock);
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free(cr, M_RPC);
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return (RPC_CANTSEND);
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}
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ct->ct_xid++;
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xid = ct->ct_xid;
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mtx_unlock(&ct->ct_lock);
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/*
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* Leave space to pre-pend the record mark.
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*/
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mreq = m_gethdr(M_WAITOK, MT_DATA);
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mreq->m_data += sizeof(uint32_t);
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KASSERT(ct->ct_mpos + sizeof(uint32_t) <= MHLEN,
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("RPC header too big"));
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bcopy(ct->ct_mcallc, mreq->m_data, ct->ct_mpos);
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mreq->m_len = ct->ct_mpos;
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|
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/*
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* The XID is the first thing in the request.
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*/
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*mtod(mreq, uint32_t *) = htonl(xid);
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xdrmbuf_create(&xdrs, mreq, XDR_ENCODE);
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errp->re_status = stat = RPC_SUCCESS;
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if ((! XDR_PUTINT32(&xdrs, &proc)) ||
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(! AUTH_MARSHALL(auth, xid, &xdrs,
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m_copym(args, 0, M_COPYALL, M_WAITOK)))) {
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errp->re_status = stat = RPC_CANTENCODEARGS;
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mtx_lock(&ct->ct_lock);
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goto out;
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}
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mreq->m_pkthdr.len = m_length(mreq, NULL);
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|
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/*
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* Prepend a record marker containing the packet length.
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*/
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M_PREPEND(mreq, sizeof(uint32_t), M_WAITOK);
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*mtod(mreq, uint32_t *) =
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htonl(0x80000000 | (mreq->m_pkthdr.len - sizeof(uint32_t)));
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|
|
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cr->cr_xid = xid;
|
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mtx_lock(&ct->ct_lock);
|
|
/*
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|
* Check to see if the other end has already started to close down
|
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* the connection. The upcall will have set ct_error.re_status
|
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* to RPC_CANTRECV if this is the case.
|
|
* If the other end starts to close down the connection after this
|
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* point, it will be detected later when cr_error is checked,
|
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* since the request is in the ct_pending queue.
|
|
*/
|
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if (ct->ct_error.re_status == RPC_CANTRECV) {
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if (errp != &ct->ct_error) {
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errp->re_errno = ct->ct_error.re_errno;
|
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errp->re_status = RPC_CANTRECV;
|
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}
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stat = RPC_CANTRECV;
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goto out;
|
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}
|
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TAILQ_INSERT_TAIL(&ct->ct_pending, cr, cr_link);
|
|
mtx_unlock(&ct->ct_lock);
|
|
|
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/*
|
|
* sosend consumes mreq.
|
|
*/
|
|
error = sosend(ct->ct_socket, NULL, NULL, mreq, NULL, 0, curthread);
|
|
mreq = NULL;
|
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if (error == EMSGSIZE || (error == ERESTART &&
|
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(ct->ct_waitflag & PCATCH) == 0 && trycnt-- > 0)) {
|
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SOCKBUF_LOCK(&ct->ct_socket->so_snd);
|
|
sbwait(&ct->ct_socket->so_snd);
|
|
SOCKBUF_UNLOCK(&ct->ct_socket->so_snd);
|
|
AUTH_VALIDATE(auth, xid, NULL, NULL);
|
|
mtx_lock(&ct->ct_lock);
|
|
TAILQ_REMOVE(&ct->ct_pending, cr, cr_link);
|
|
/* Sleep for 1 clock tick before trying the sosend() again. */
|
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msleep(&fake_wchan, &ct->ct_lock, 0, "rpclpsnd", 1);
|
|
goto call_again;
|
|
}
|
|
|
|
reply_msg.acpted_rply.ar_verf.oa_flavor = AUTH_NULL;
|
|
reply_msg.acpted_rply.ar_verf.oa_base = cr->cr_verf;
|
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reply_msg.acpted_rply.ar_verf.oa_length = 0;
|
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reply_msg.acpted_rply.ar_results.where = NULL;
|
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reply_msg.acpted_rply.ar_results.proc = (xdrproc_t)xdr_void;
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|
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mtx_lock(&ct->ct_lock);
|
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if (error) {
|
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TAILQ_REMOVE(&ct->ct_pending, cr, cr_link);
|
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errp->re_errno = error;
|
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errp->re_status = stat = RPC_CANTSEND;
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goto out;
|
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}
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|
|
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/*
|
|
* Check to see if we got an upcall while waiting for the
|
|
* lock. In both these cases, the request has been removed
|
|
* from ct->ct_pending.
|
|
*/
|
|
if (cr->cr_error) {
|
|
TAILQ_REMOVE(&ct->ct_pending, cr, cr_link);
|
|
errp->re_errno = cr->cr_error;
|
|
errp->re_status = stat = RPC_CANTRECV;
|
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goto out;
|
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}
|
|
if (cr->cr_mrep) {
|
|
TAILQ_REMOVE(&ct->ct_pending, cr, cr_link);
|
|
goto got_reply;
|
|
}
|
|
|
|
/*
|
|
* Hack to provide rpc-based message passing
|
|
*/
|
|
if (timeout.tv_sec == 0 && timeout.tv_usec == 0) {
|
|
TAILQ_REMOVE(&ct->ct_pending, cr, cr_link);
|
|
errp->re_status = stat = RPC_TIMEDOUT;
|
|
goto out;
|
|
}
|
|
|
|
error = msleep(cr, &ct->ct_lock, ct->ct_waitflag, ct->ct_waitchan,
|
|
tvtohz(&timeout));
|
|
|
|
TAILQ_REMOVE(&ct->ct_pending, cr, cr_link);
|
|
|
|
if (error) {
|
|
/*
|
|
* The sleep returned an error so our request is still
|
|
* on the list. Turn the error code into an
|
|
* appropriate client status.
|
|
*/
|
|
errp->re_errno = error;
|
|
switch (error) {
|
|
case EINTR:
|
|
stat = RPC_INTR;
|
|
break;
|
|
case EWOULDBLOCK:
|
|
stat = RPC_TIMEDOUT;
|
|
break;
|
|
default:
|
|
stat = RPC_CANTRECV;
|
|
}
|
|
errp->re_status = stat;
|
|
goto out;
|
|
} else {
|
|
/*
|
|
* We were woken up by the upcall. If the
|
|
* upcall had a receive error, report that,
|
|
* otherwise we have a reply.
|
|
*/
|
|
if (cr->cr_error) {
|
|
errp->re_errno = cr->cr_error;
|
|
errp->re_status = stat = RPC_CANTRECV;
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
got_reply:
|
|
/*
|
|
* Now decode and validate the response. We need to drop the
|
|
* lock since xdr_replymsg may end up sleeping in malloc.
|
|
*/
|
|
mtx_unlock(&ct->ct_lock);
|
|
|
|
if (ext && ext->rc_feedback)
|
|
ext->rc_feedback(FEEDBACK_OK, proc, ext->rc_feedback_arg);
|
|
|
|
xdrmbuf_create(&xdrs, cr->cr_mrep, XDR_DECODE);
|
|
ok = xdr_replymsg(&xdrs, &reply_msg);
|
|
cr->cr_mrep = NULL;
|
|
|
|
if (ok) {
|
|
if ((reply_msg.rm_reply.rp_stat == MSG_ACCEPTED) &&
|
|
(reply_msg.acpted_rply.ar_stat == SUCCESS))
|
|
errp->re_status = stat = RPC_SUCCESS;
|
|
else
|
|
stat = _seterr_reply(&reply_msg, errp);
|
|
|
|
if (stat == RPC_SUCCESS) {
|
|
results = xdrmbuf_getall(&xdrs);
|
|
if (!AUTH_VALIDATE(auth, xid,
|
|
&reply_msg.acpted_rply.ar_verf,
|
|
&results)) {
|
|
errp->re_status = stat = RPC_AUTHERROR;
|
|
errp->re_why = AUTH_INVALIDRESP;
|
|
} else {
|
|
KASSERT(results,
|
|
("auth validated but no result"));
|
|
*resultsp = results;
|
|
}
|
|
} /* end successful completion */
|
|
/*
|
|
* If unsuccessful AND error is an authentication error
|
|
* then refresh credentials and try again, else break
|
|
*/
|
|
else if (stat == RPC_AUTHERROR)
|
|
/* maybe our credentials need to be refreshed ... */
|
|
if (nrefreshes > 0 &&
|
|
AUTH_REFRESH(auth, &reply_msg)) {
|
|
nrefreshes--;
|
|
XDR_DESTROY(&xdrs);
|
|
mtx_lock(&ct->ct_lock);
|
|
goto call_again;
|
|
}
|
|
/* end of unsuccessful completion */
|
|
} /* end of valid reply message */
|
|
else {
|
|
errp->re_status = stat = RPC_CANTDECODERES;
|
|
}
|
|
XDR_DESTROY(&xdrs);
|
|
mtx_lock(&ct->ct_lock);
|
|
out:
|
|
mtx_assert(&ct->ct_lock, MA_OWNED);
|
|
|
|
KASSERT(stat != RPC_SUCCESS || *resultsp,
|
|
("RPC_SUCCESS without reply"));
|
|
|
|
if (mreq)
|
|
m_freem(mreq);
|
|
if (cr->cr_mrep)
|
|
m_freem(cr->cr_mrep);
|
|
|
|
ct->ct_threads--;
|
|
if (ct->ct_closing)
|
|
wakeup(ct);
|
|
|
|
mtx_unlock(&ct->ct_lock);
|
|
|
|
if (auth && stat != RPC_SUCCESS)
|
|
AUTH_VALIDATE(auth, xid, NULL, NULL);
|
|
|
|
free(cr, M_RPC);
|
|
|
|
return (stat);
|
|
}
|
|
|
|
static void
|
|
clnt_vc_geterr(CLIENT *cl, struct rpc_err *errp)
|
|
{
|
|
struct ct_data *ct = (struct ct_data *) cl->cl_private;
|
|
|
|
*errp = ct->ct_error;
|
|
}
|
|
|
|
static bool_t
|
|
clnt_vc_freeres(CLIENT *cl, xdrproc_t xdr_res, void *res_ptr)
|
|
{
|
|
XDR xdrs;
|
|
bool_t dummy;
|
|
|
|
xdrs.x_op = XDR_FREE;
|
|
dummy = (*xdr_res)(&xdrs, res_ptr);
|
|
|
|
return (dummy);
|
|
}
|
|
|
|
/*ARGSUSED*/
|
|
static void
|
|
clnt_vc_abort(CLIENT *cl)
|
|
{
|
|
}
|
|
|
|
static bool_t
|
|
clnt_vc_control(CLIENT *cl, u_int request, void *info)
|
|
{
|
|
struct ct_data *ct = (struct ct_data *)cl->cl_private;
|
|
void *infop = info;
|
|
SVCXPRT *xprt;
|
|
|
|
mtx_lock(&ct->ct_lock);
|
|
|
|
switch (request) {
|
|
case CLSET_FD_CLOSE:
|
|
ct->ct_closeit = TRUE;
|
|
mtx_unlock(&ct->ct_lock);
|
|
return (TRUE);
|
|
case CLSET_FD_NCLOSE:
|
|
ct->ct_closeit = FALSE;
|
|
mtx_unlock(&ct->ct_lock);
|
|
return (TRUE);
|
|
default:
|
|
break;
|
|
}
|
|
|
|
/* for other requests which use info */
|
|
if (info == NULL) {
|
|
mtx_unlock(&ct->ct_lock);
|
|
return (FALSE);
|
|
}
|
|
switch (request) {
|
|
case CLSET_TIMEOUT:
|
|
if (time_not_ok((struct timeval *)info)) {
|
|
mtx_unlock(&ct->ct_lock);
|
|
return (FALSE);
|
|
}
|
|
ct->ct_wait = *(struct timeval *)infop;
|
|
break;
|
|
case CLGET_TIMEOUT:
|
|
*(struct timeval *)infop = ct->ct_wait;
|
|
break;
|
|
case CLGET_SERVER_ADDR:
|
|
(void) memcpy(info, &ct->ct_addr, (size_t)ct->ct_addr.ss_len);
|
|
break;
|
|
case CLGET_SVC_ADDR:
|
|
/*
|
|
* Slightly different semantics to userland - we use
|
|
* sockaddr instead of netbuf.
|
|
*/
|
|
memcpy(info, &ct->ct_addr, ct->ct_addr.ss_len);
|
|
break;
|
|
case CLSET_SVC_ADDR: /* set to new address */
|
|
mtx_unlock(&ct->ct_lock);
|
|
return (FALSE);
|
|
case CLGET_XID:
|
|
*(uint32_t *)info = ct->ct_xid;
|
|
break;
|
|
case CLSET_XID:
|
|
/* This will set the xid of the NEXT call */
|
|
/* decrement by 1 as clnt_vc_call() increments once */
|
|
ct->ct_xid = *(uint32_t *)info - 1;
|
|
break;
|
|
case CLGET_VERS:
|
|
/*
|
|
* This RELIES on the information that, in the call body,
|
|
* the version number field is the fifth field from the
|
|
* beginning of the RPC header. MUST be changed if the
|
|
* call_struct is changed
|
|
*/
|
|
*(uint32_t *)info =
|
|
ntohl(*(uint32_t *)(void *)(ct->ct_mcallc +
|
|
4 * BYTES_PER_XDR_UNIT));
|
|
break;
|
|
|
|
case CLSET_VERS:
|
|
*(uint32_t *)(void *)(ct->ct_mcallc +
|
|
4 * BYTES_PER_XDR_UNIT) =
|
|
htonl(*(uint32_t *)info);
|
|
break;
|
|
|
|
case CLGET_PROG:
|
|
/*
|
|
* This RELIES on the information that, in the call body,
|
|
* the program number field is the fourth field from the
|
|
* beginning of the RPC header. MUST be changed if the
|
|
* call_struct is changed
|
|
*/
|
|
*(uint32_t *)info =
|
|
ntohl(*(uint32_t *)(void *)(ct->ct_mcallc +
|
|
3 * BYTES_PER_XDR_UNIT));
|
|
break;
|
|
|
|
case CLSET_PROG:
|
|
*(uint32_t *)(void *)(ct->ct_mcallc +
|
|
3 * BYTES_PER_XDR_UNIT) =
|
|
htonl(*(uint32_t *)info);
|
|
break;
|
|
|
|
case CLSET_WAITCHAN:
|
|
ct->ct_waitchan = (const char *)info;
|
|
break;
|
|
|
|
case CLGET_WAITCHAN:
|
|
*(const char **) info = ct->ct_waitchan;
|
|
break;
|
|
|
|
case CLSET_INTERRUPTIBLE:
|
|
if (*(int *) info)
|
|
ct->ct_waitflag = PCATCH;
|
|
else
|
|
ct->ct_waitflag = 0;
|
|
break;
|
|
|
|
case CLGET_INTERRUPTIBLE:
|
|
if (ct->ct_waitflag)
|
|
*(int *) info = TRUE;
|
|
else
|
|
*(int *) info = FALSE;
|
|
break;
|
|
|
|
case CLSET_BACKCHANNEL:
|
|
xprt = (SVCXPRT *)info;
|
|
if (ct->ct_backchannelxprt == NULL) {
|
|
xprt->xp_p2 = ct;
|
|
ct->ct_backchannelxprt = xprt;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
mtx_unlock(&ct->ct_lock);
|
|
return (FALSE);
|
|
}
|
|
|
|
mtx_unlock(&ct->ct_lock);
|
|
return (TRUE);
|
|
}
|
|
|
|
static void
|
|
clnt_vc_close(CLIENT *cl)
|
|
{
|
|
struct ct_data *ct = (struct ct_data *) cl->cl_private;
|
|
struct ct_request *cr;
|
|
|
|
mtx_lock(&ct->ct_lock);
|
|
|
|
if (ct->ct_closed) {
|
|
mtx_unlock(&ct->ct_lock);
|
|
return;
|
|
}
|
|
|
|
if (ct->ct_closing) {
|
|
while (ct->ct_closing)
|
|
msleep(ct, &ct->ct_lock, 0, "rpcclose", 0);
|
|
KASSERT(ct->ct_closed, ("client should be closed"));
|
|
mtx_unlock(&ct->ct_lock);
|
|
return;
|
|
}
|
|
|
|
if (ct->ct_socket) {
|
|
ct->ct_closing = TRUE;
|
|
mtx_unlock(&ct->ct_lock);
|
|
|
|
SOCKBUF_LOCK(&ct->ct_socket->so_rcv);
|
|
soupcall_clear(ct->ct_socket, SO_RCV);
|
|
clnt_vc_upcallsdone(ct);
|
|
SOCKBUF_UNLOCK(&ct->ct_socket->so_rcv);
|
|
|
|
/*
|
|
* Abort any pending requests and wait until everyone
|
|
* has finished with clnt_vc_call.
|
|
*/
|
|
mtx_lock(&ct->ct_lock);
|
|
TAILQ_FOREACH(cr, &ct->ct_pending, cr_link) {
|
|
cr->cr_xid = 0;
|
|
cr->cr_error = ESHUTDOWN;
|
|
wakeup(cr);
|
|
}
|
|
|
|
while (ct->ct_threads)
|
|
msleep(ct, &ct->ct_lock, 0, "rpcclose", 0);
|
|
}
|
|
|
|
ct->ct_closing = FALSE;
|
|
ct->ct_closed = TRUE;
|
|
mtx_unlock(&ct->ct_lock);
|
|
wakeup(ct);
|
|
}
|
|
|
|
static void
|
|
clnt_vc_destroy(CLIENT *cl)
|
|
{
|
|
struct ct_data *ct = (struct ct_data *) cl->cl_private;
|
|
struct socket *so = NULL;
|
|
SVCXPRT *xprt;
|
|
|
|
clnt_vc_close(cl);
|
|
|
|
mtx_lock(&ct->ct_lock);
|
|
xprt = ct->ct_backchannelxprt;
|
|
ct->ct_backchannelxprt = NULL;
|
|
if (xprt != NULL) {
|
|
mtx_unlock(&ct->ct_lock); /* To avoid a LOR. */
|
|
sx_xlock(&xprt->xp_lock);
|
|
mtx_lock(&ct->ct_lock);
|
|
xprt->xp_p2 = NULL;
|
|
sx_xunlock(&xprt->xp_lock);
|
|
}
|
|
|
|
if (ct->ct_socket) {
|
|
if (ct->ct_closeit) {
|
|
so = ct->ct_socket;
|
|
}
|
|
}
|
|
|
|
mtx_unlock(&ct->ct_lock);
|
|
|
|
mtx_destroy(&ct->ct_lock);
|
|
if (so) {
|
|
soshutdown(so, SHUT_WR);
|
|
soclose(so);
|
|
}
|
|
mem_free(ct, sizeof(struct ct_data));
|
|
if (cl->cl_netid && cl->cl_netid[0])
|
|
mem_free(cl->cl_netid, strlen(cl->cl_netid) +1);
|
|
if (cl->cl_tp && cl->cl_tp[0])
|
|
mem_free(cl->cl_tp, strlen(cl->cl_tp) +1);
|
|
mem_free(cl, sizeof(CLIENT));
|
|
}
|
|
|
|
/*
|
|
* Make sure that the time is not garbage. -1 value is disallowed.
|
|
* Note this is different from time_not_ok in clnt_dg.c
|
|
*/
|
|
static bool_t
|
|
time_not_ok(struct timeval *t)
|
|
{
|
|
return (t->tv_sec <= -1 || t->tv_sec > 100000000 ||
|
|
t->tv_usec <= -1 || t->tv_usec > 1000000);
|
|
}
|
|
|
|
int
|
|
clnt_vc_soupcall(struct socket *so, void *arg, int waitflag)
|
|
{
|
|
struct ct_data *ct = (struct ct_data *) arg;
|
|
struct uio uio;
|
|
struct mbuf *m, *m2;
|
|
struct ct_request *cr;
|
|
int error, rcvflag, foundreq;
|
|
uint32_t xid_plus_direction[2], header;
|
|
bool_t do_read;
|
|
SVCXPRT *xprt;
|
|
struct cf_conn *cd;
|
|
|
|
CTASSERT(sizeof(xid_plus_direction) == 2 * sizeof(uint32_t));
|
|
ct->ct_upcallrefs++;
|
|
uio.uio_td = curthread;
|
|
do {
|
|
/*
|
|
* If ct_record_resid is zero, we are waiting for a
|
|
* record mark.
|
|
*/
|
|
if (ct->ct_record_resid == 0) {
|
|
|
|
/*
|
|
* Make sure there is either a whole record
|
|
* mark in the buffer or there is some other
|
|
* error condition
|
|
*/
|
|
do_read = FALSE;
|
|
if (sbavail(&so->so_rcv) >= sizeof(uint32_t)
|
|
|| (so->so_rcv.sb_state & SBS_CANTRCVMORE)
|
|
|| so->so_error)
|
|
do_read = TRUE;
|
|
|
|
if (!do_read)
|
|
break;
|
|
|
|
SOCKBUF_UNLOCK(&so->so_rcv);
|
|
uio.uio_resid = sizeof(uint32_t);
|
|
m = NULL;
|
|
rcvflag = MSG_DONTWAIT | MSG_SOCALLBCK;
|
|
error = soreceive(so, NULL, &uio, &m, NULL, &rcvflag);
|
|
SOCKBUF_LOCK(&so->so_rcv);
|
|
|
|
if (error == EWOULDBLOCK)
|
|
break;
|
|
|
|
/*
|
|
* If there was an error, wake up all pending
|
|
* requests.
|
|
*/
|
|
if (error || uio.uio_resid > 0) {
|
|
wakeup_all:
|
|
mtx_lock(&ct->ct_lock);
|
|
if (!error) {
|
|
/*
|
|
* We must have got EOF trying
|
|
* to read from the stream.
|
|
*/
|
|
error = ECONNRESET;
|
|
}
|
|
ct->ct_error.re_status = RPC_CANTRECV;
|
|
ct->ct_error.re_errno = error;
|
|
TAILQ_FOREACH(cr, &ct->ct_pending, cr_link) {
|
|
cr->cr_error = error;
|
|
wakeup(cr);
|
|
}
|
|
mtx_unlock(&ct->ct_lock);
|
|
break;
|
|
}
|
|
m_copydata(m, 0, sizeof(uint32_t), (char *)&header);
|
|
header = ntohl(header);
|
|
ct->ct_record = NULL;
|
|
ct->ct_record_resid = header & 0x7fffffff;
|
|
ct->ct_record_eor = ((header & 0x80000000) != 0);
|
|
m_freem(m);
|
|
} else {
|
|
/*
|
|
* Wait until the socket has the whole record
|
|
* buffered.
|
|
*/
|
|
do_read = FALSE;
|
|
if (sbavail(&so->so_rcv) >= ct->ct_record_resid
|
|
|| (so->so_rcv.sb_state & SBS_CANTRCVMORE)
|
|
|| so->so_error)
|
|
do_read = TRUE;
|
|
|
|
if (!do_read)
|
|
break;
|
|
|
|
/*
|
|
* We have the record mark. Read as much as
|
|
* the socket has buffered up to the end of
|
|
* this record.
|
|
*/
|
|
SOCKBUF_UNLOCK(&so->so_rcv);
|
|
uio.uio_resid = ct->ct_record_resid;
|
|
m = NULL;
|
|
rcvflag = MSG_DONTWAIT | MSG_SOCALLBCK;
|
|
error = soreceive(so, NULL, &uio, &m, NULL, &rcvflag);
|
|
SOCKBUF_LOCK(&so->so_rcv);
|
|
|
|
if (error == EWOULDBLOCK)
|
|
break;
|
|
|
|
if (error || uio.uio_resid == ct->ct_record_resid)
|
|
goto wakeup_all;
|
|
|
|
/*
|
|
* If we have part of the record already,
|
|
* chain this bit onto the end.
|
|
*/
|
|
if (ct->ct_record)
|
|
m_last(ct->ct_record)->m_next = m;
|
|
else
|
|
ct->ct_record = m;
|
|
|
|
ct->ct_record_resid = uio.uio_resid;
|
|
|
|
/*
|
|
* If we have the entire record, see if we can
|
|
* match it to a request.
|
|
*/
|
|
if (ct->ct_record_resid == 0
|
|
&& ct->ct_record_eor) {
|
|
/*
|
|
* The XID is in the first uint32_t of
|
|
* the reply and the message direction
|
|
* is the second one.
|
|
*/
|
|
if (ct->ct_record->m_len <
|
|
sizeof(xid_plus_direction) &&
|
|
m_length(ct->ct_record, NULL) <
|
|
sizeof(xid_plus_direction)) {
|
|
m_freem(ct->ct_record);
|
|
break;
|
|
}
|
|
m_copydata(ct->ct_record, 0,
|
|
sizeof(xid_plus_direction),
|
|
(char *)xid_plus_direction);
|
|
xid_plus_direction[0] =
|
|
ntohl(xid_plus_direction[0]);
|
|
xid_plus_direction[1] =
|
|
ntohl(xid_plus_direction[1]);
|
|
/* Check message direction. */
|
|
if (xid_plus_direction[1] == CALL) {
|
|
/* This is a backchannel request. */
|
|
mtx_lock(&ct->ct_lock);
|
|
xprt = ct->ct_backchannelxprt;
|
|
if (xprt == NULL) {
|
|
mtx_unlock(&ct->ct_lock);
|
|
/* Just throw it away. */
|
|
m_freem(ct->ct_record);
|
|
ct->ct_record = NULL;
|
|
} else {
|
|
cd = (struct cf_conn *)
|
|
xprt->xp_p1;
|
|
m2 = cd->mreq;
|
|
/*
|
|
* The requests are chained
|
|
* in the m_nextpkt list.
|
|
*/
|
|
while (m2 != NULL &&
|
|
m2->m_nextpkt != NULL)
|
|
/* Find end of list. */
|
|
m2 = m2->m_nextpkt;
|
|
if (m2 != NULL)
|
|
m2->m_nextpkt =
|
|
ct->ct_record;
|
|
else
|
|
cd->mreq =
|
|
ct->ct_record;
|
|
ct->ct_record->m_nextpkt =
|
|
NULL;
|
|
ct->ct_record = NULL;
|
|
xprt_active(xprt);
|
|
mtx_unlock(&ct->ct_lock);
|
|
}
|
|
} else {
|
|
mtx_lock(&ct->ct_lock);
|
|
foundreq = 0;
|
|
TAILQ_FOREACH(cr, &ct->ct_pending,
|
|
cr_link) {
|
|
if (cr->cr_xid ==
|
|
xid_plus_direction[0]) {
|
|
/*
|
|
* This one
|
|
* matches. We leave
|
|
* the reply mbuf in
|
|
* cr->cr_mrep. Set
|
|
* the XID to zero so
|
|
* that we will ignore
|
|
* any duplicated
|
|
* replies.
|
|
*/
|
|
cr->cr_xid = 0;
|
|
cr->cr_mrep =
|
|
ct->ct_record;
|
|
cr->cr_error = 0;
|
|
foundreq = 1;
|
|
wakeup(cr);
|
|
break;
|
|
}
|
|
}
|
|
mtx_unlock(&ct->ct_lock);
|
|
|
|
if (!foundreq)
|
|
m_freem(ct->ct_record);
|
|
ct->ct_record = NULL;
|
|
}
|
|
}
|
|
}
|
|
} while (m);
|
|
ct->ct_upcallrefs--;
|
|
if (ct->ct_upcallrefs < 0)
|
|
panic("rpcvc upcall refcnt");
|
|
if (ct->ct_upcallrefs == 0)
|
|
wakeup(&ct->ct_upcallrefs);
|
|
return (SU_OK);
|
|
}
|
|
|
|
/*
|
|
* Wait for all upcalls in progress to complete.
|
|
*/
|
|
static void
|
|
clnt_vc_upcallsdone(struct ct_data *ct)
|
|
{
|
|
|
|
SOCKBUF_LOCK_ASSERT(&ct->ct_socket->so_rcv);
|
|
|
|
while (ct->ct_upcallrefs > 0)
|
|
(void) msleep(&ct->ct_upcallrefs,
|
|
SOCKBUF_MTX(&ct->ct_socket->so_rcv), 0, "rpcvcup", 0);
|
|
}
|