1177633Sdfr/* $NetBSD: clnt_vc.c,v 1.4 2000/07/14 08:40:42 fvdl Exp $ */ 2177633Sdfr 3261046Smav/*- 4261046Smav * Copyright (c) 2009, Sun Microsystems, Inc. 5261046Smav * All rights reserved. 6261046Smav * 7261046Smav * Redistribution and use in source and binary forms, with or without 8261046Smav * modification, are permitted provided that the following conditions are met: 9261046Smav * - Redistributions of source code must retain the above copyright notice, 10261046Smav * this list of conditions and the following disclaimer. 11261046Smav * - Redistributions in binary form must reproduce the above copyright notice, 12261046Smav * this list of conditions and the following disclaimer in the documentation 13261046Smav * and/or other materials provided with the distribution. 14261046Smav * - Neither the name of Sun Microsystems, Inc. nor the names of its 15261046Smav * contributors may be used to endorse or promote products derived 16261046Smav * from this software without specific prior written permission. 17177633Sdfr * 18261046Smav * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 19261046Smav * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20261046Smav * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21261046Smav * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 22261046Smav * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23261046Smav * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24261046Smav * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25261046Smav * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26261046Smav * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27261046Smav * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28261046Smav * POSSIBILITY OF SUCH DAMAGE. 29177633Sdfr */ 30177633Sdfr 31177633Sdfr#if defined(LIBC_SCCS) && !defined(lint) 32177633Sdfrstatic char *sccsid2 = "@(#)clnt_tcp.c 1.37 87/10/05 Copyr 1984 Sun Micro"; 33177633Sdfrstatic char *sccsid = "@(#)clnt_tcp.c 2.2 88/08/01 4.0 RPCSRC"; 34177633Sdfrstatic char sccsid3[] = "@(#)clnt_vc.c 1.19 89/03/16 Copyr 1988 Sun Micro"; 35177633Sdfr#endif 36177633Sdfr#include <sys/cdefs.h> 37177633Sdfr__FBSDID("$FreeBSD: releng/10.3/sys/rpc/clnt_vc.c 266243 2014-05-16 15:48:45Z brueffer $"); 38177633Sdfr 39177633Sdfr/* 40177633Sdfr * clnt_tcp.c, Implements a TCP/IP based, client side RPC. 41177633Sdfr * 42177633Sdfr * Copyright (C) 1984, Sun Microsystems, Inc. 43177633Sdfr * 44177633Sdfr * TCP based RPC supports 'batched calls'. 45177633Sdfr * A sequence of calls may be batched-up in a send buffer. The rpc call 46177633Sdfr * return immediately to the client even though the call was not necessarily 47177633Sdfr * sent. The batching occurs if the results' xdr routine is NULL (0) AND 48177633Sdfr * the rpc timeout value is zero (see clnt.h, rpc). 49177633Sdfr * 50177633Sdfr * Clients should NOT casually batch calls that in fact return results; that is, 51177633Sdfr * the server side should be aware that a call is batched and not produce any 52177633Sdfr * return message. Batched calls that produce many result messages can 53177633Sdfr * deadlock (netlock) the client and the server.... 54177633Sdfr * 55177633Sdfr * Now go hang yourself. 56177633Sdfr */ 57177633Sdfr 58177633Sdfr#include <sys/param.h> 59177633Sdfr#include <sys/systm.h> 60177633Sdfr#include <sys/lock.h> 61177633Sdfr#include <sys/malloc.h> 62177633Sdfr#include <sys/mbuf.h> 63177633Sdfr#include <sys/mutex.h> 64177633Sdfr#include <sys/pcpu.h> 65177633Sdfr#include <sys/proc.h> 66184588Sdfr#include <sys/protosw.h> 67177633Sdfr#include <sys/socket.h> 68177633Sdfr#include <sys/socketvar.h> 69244008Srmacklem#include <sys/sx.h> 70177633Sdfr#include <sys/syslog.h> 71177633Sdfr#include <sys/time.h> 72177633Sdfr#include <sys/uio.h> 73196503Szec 74196503Szec#include <net/vnet.h> 75196503Szec 76184588Sdfr#include <netinet/tcp.h> 77177633Sdfr 78177633Sdfr#include <rpc/rpc.h> 79177685Sdfr#include <rpc/rpc_com.h> 80244008Srmacklem#include <rpc/krpc.h> 81177633Sdfr 82177633Sdfrstruct cmessage { 83177633Sdfr struct cmsghdr cmsg; 84177633Sdfr struct cmsgcred cmcred; 85177633Sdfr}; 86177633Sdfr 87180025Sdfrstatic enum clnt_stat clnt_vc_call(CLIENT *, struct rpc_callextra *, 88184588Sdfr rpcproc_t, struct mbuf *, struct mbuf **, struct timeval); 89177633Sdfrstatic void clnt_vc_geterr(CLIENT *, struct rpc_err *); 90177633Sdfrstatic bool_t clnt_vc_freeres(CLIENT *, xdrproc_t, void *); 91177633Sdfrstatic void clnt_vc_abort(CLIENT *); 92177633Sdfrstatic bool_t clnt_vc_control(CLIENT *, u_int, void *); 93184588Sdfrstatic void clnt_vc_close(CLIENT *); 94177633Sdfrstatic void clnt_vc_destroy(CLIENT *); 95177633Sdfrstatic bool_t time_not_ok(struct timeval *); 96193272Sjhbstatic int clnt_vc_soupcall(struct socket *so, void *arg, int waitflag); 97177633Sdfr 98177633Sdfrstatic struct clnt_ops clnt_vc_ops = { 99177633Sdfr .cl_call = clnt_vc_call, 100177633Sdfr .cl_abort = clnt_vc_abort, 101177633Sdfr .cl_geterr = clnt_vc_geterr, 102177633Sdfr .cl_freeres = clnt_vc_freeres, 103184588Sdfr .cl_close = clnt_vc_close, 104177633Sdfr .cl_destroy = clnt_vc_destroy, 105177633Sdfr .cl_control = clnt_vc_control 106177633Sdfr}; 107177633Sdfr 108193437Srmacklemstatic void clnt_vc_upcallsdone(struct ct_data *); 109193437Srmacklem 110177633Sdfr/* 111177633Sdfr * Create a client handle for a connection. 112177633Sdfr * Default options are set, which the user can change using clnt_control()'s. 113177633Sdfr * The rpc/vc package does buffering similar to stdio, so the client 114177633Sdfr * must pick send and receive buffer sizes, 0 => use the default. 115177633Sdfr * NB: fd is copied into a private area. 116177633Sdfr * NB: The rpch->cl_auth is set null authentication. Caller may wish to 117177633Sdfr * set this something more useful. 118177633Sdfr * 119177633Sdfr * fd should be an open socket 120177633Sdfr */ 121177633SdfrCLIENT * 122177633Sdfrclnt_vc_create( 123177633Sdfr struct socket *so, /* open file descriptor */ 124177633Sdfr struct sockaddr *raddr, /* servers address */ 125177633Sdfr const rpcprog_t prog, /* program number */ 126177633Sdfr const rpcvers_t vers, /* version number */ 127177633Sdfr size_t sendsz, /* buffer recv size */ 128221127Srmacklem size_t recvsz, /* buffer send size */ 129221127Srmacklem int intrflag) /* interruptible */ 130177633Sdfr{ 131177633Sdfr CLIENT *cl; /* client handle */ 132177633Sdfr struct ct_data *ct = NULL; /* client handle */ 133177633Sdfr struct timeval now; 134177633Sdfr struct rpc_msg call_msg; 135177633Sdfr static uint32_t disrupt; 136177633Sdfr struct __rpc_sockinfo si; 137177633Sdfr XDR xdrs; 138221127Srmacklem int error, interrupted, one = 1, sleep_flag; 139184588Sdfr struct sockopt sopt; 140177633Sdfr 141177633Sdfr if (disrupt == 0) 142177633Sdfr disrupt = (uint32_t)(long)raddr; 143177633Sdfr 144177633Sdfr cl = (CLIENT *)mem_alloc(sizeof (*cl)); 145177633Sdfr ct = (struct ct_data *)mem_alloc(sizeof (*ct)); 146177633Sdfr 147177633Sdfr mtx_init(&ct->ct_lock, "ct->ct_lock", NULL, MTX_DEF); 148180025Sdfr ct->ct_threads = 0; 149180025Sdfr ct->ct_closing = FALSE; 150184588Sdfr ct->ct_closed = FALSE; 151193437Srmacklem ct->ct_upcallrefs = 0; 152177633Sdfr 153177633Sdfr if ((so->so_state & (SS_ISCONNECTED|SS_ISCONFIRMING)) == 0) { 154177633Sdfr error = soconnect(so, raddr, curthread); 155180025Sdfr SOCK_LOCK(so); 156180025Sdfr interrupted = 0; 157221127Srmacklem sleep_flag = PSOCK; 158221127Srmacklem if (intrflag != 0) 159248255Sjhb sleep_flag |= PCATCH; 160180025Sdfr while ((so->so_state & SS_ISCONNECTING) 161180025Sdfr && so->so_error == 0) { 162180025Sdfr error = msleep(&so->so_timeo, SOCK_MTX(so), 163221127Srmacklem sleep_flag, "connec", 0); 164180025Sdfr if (error) { 165180025Sdfr if (error == EINTR || error == ERESTART) 166180025Sdfr interrupted = 1; 167180025Sdfr break; 168180025Sdfr } 169180025Sdfr } 170180025Sdfr if (error == 0) { 171180025Sdfr error = so->so_error; 172180025Sdfr so->so_error = 0; 173180025Sdfr } 174180025Sdfr SOCK_UNLOCK(so); 175177633Sdfr if (error) { 176180025Sdfr if (!interrupted) 177180025Sdfr so->so_state &= ~SS_ISCONNECTING; 178177633Sdfr rpc_createerr.cf_stat = RPC_SYSTEMERROR; 179177633Sdfr rpc_createerr.cf_error.re_errno = error; 180177633Sdfr goto err; 181177633Sdfr } 182177633Sdfr } 183177633Sdfr 184196503Szec if (!__rpc_socket2sockinfo(so, &si)) { 185177633Sdfr goto err; 186196503Szec } 187177633Sdfr 188184588Sdfr if (so->so_proto->pr_flags & PR_CONNREQUIRED) { 189184588Sdfr bzero(&sopt, sizeof(sopt)); 190184588Sdfr sopt.sopt_dir = SOPT_SET; 191184588Sdfr sopt.sopt_level = SOL_SOCKET; 192184588Sdfr sopt.sopt_name = SO_KEEPALIVE; 193184588Sdfr sopt.sopt_val = &one; 194184588Sdfr sopt.sopt_valsize = sizeof(one); 195184588Sdfr sosetopt(so, &sopt); 196184588Sdfr } 197184588Sdfr 198184588Sdfr if (so->so_proto->pr_protocol == IPPROTO_TCP) { 199184588Sdfr bzero(&sopt, sizeof(sopt)); 200184588Sdfr sopt.sopt_dir = SOPT_SET; 201184588Sdfr sopt.sopt_level = IPPROTO_TCP; 202184588Sdfr sopt.sopt_name = TCP_NODELAY; 203184588Sdfr sopt.sopt_val = &one; 204184588Sdfr sopt.sopt_valsize = sizeof(one); 205184588Sdfr sosetopt(so, &sopt); 206184588Sdfr } 207184588Sdfr 208177633Sdfr ct->ct_closeit = FALSE; 209177633Sdfr 210177633Sdfr /* 211177633Sdfr * Set up private data struct 212177633Sdfr */ 213177633Sdfr ct->ct_socket = so; 214177633Sdfr ct->ct_wait.tv_sec = -1; 215177633Sdfr ct->ct_wait.tv_usec = -1; 216177633Sdfr memcpy(&ct->ct_addr, raddr, raddr->sa_len); 217177633Sdfr 218177633Sdfr /* 219177633Sdfr * Initialize call message 220177633Sdfr */ 221177633Sdfr getmicrotime(&now); 222177633Sdfr ct->ct_xid = ((uint32_t)++disrupt) ^ __RPC_GETXID(&now); 223177633Sdfr call_msg.rm_xid = ct->ct_xid; 224177633Sdfr call_msg.rm_direction = CALL; 225177633Sdfr call_msg.rm_call.cb_rpcvers = RPC_MSG_VERSION; 226177633Sdfr call_msg.rm_call.cb_prog = (uint32_t)prog; 227177633Sdfr call_msg.rm_call.cb_vers = (uint32_t)vers; 228177633Sdfr 229177633Sdfr /* 230177633Sdfr * pre-serialize the static part of the call msg and stash it away 231177633Sdfr */ 232177633Sdfr xdrmem_create(&xdrs, ct->ct_mcallc, MCALL_MSG_SIZE, 233177633Sdfr XDR_ENCODE); 234177633Sdfr if (! xdr_callhdr(&xdrs, &call_msg)) { 235177633Sdfr if (ct->ct_closeit) { 236177633Sdfr soclose(ct->ct_socket); 237177633Sdfr } 238177633Sdfr goto err; 239177633Sdfr } 240177633Sdfr ct->ct_mpos = XDR_GETPOS(&xdrs); 241177633Sdfr XDR_DESTROY(&xdrs); 242177633Sdfr ct->ct_waitchan = "rpcrecv"; 243177633Sdfr ct->ct_waitflag = 0; 244177633Sdfr 245177633Sdfr /* 246177633Sdfr * Create a client handle which uses xdrrec for serialization 247177633Sdfr * and authnone for authentication. 248177633Sdfr */ 249213756Srmacklem sendsz = __rpc_get_t_size(si.si_af, si.si_proto, (int)sendsz); 250213756Srmacklem recvsz = __rpc_get_t_size(si.si_af, si.si_proto, (int)recvsz); 251213756Srmacklem error = soreserve(ct->ct_socket, sendsz, recvsz); 252213756Srmacklem if (error != 0) { 253213756Srmacklem if (ct->ct_closeit) { 254213756Srmacklem soclose(ct->ct_socket); 255213756Srmacklem } 256213756Srmacklem goto err; 257213756Srmacklem } 258180025Sdfr cl->cl_refs = 1; 259177633Sdfr cl->cl_ops = &clnt_vc_ops; 260177633Sdfr cl->cl_private = ct; 261177633Sdfr cl->cl_auth = authnone_create(); 262177633Sdfr 263177633Sdfr SOCKBUF_LOCK(&ct->ct_socket->so_rcv); 264193272Sjhb soupcall_set(ct->ct_socket, SO_RCV, clnt_vc_soupcall, ct); 265177633Sdfr SOCKBUF_UNLOCK(&ct->ct_socket->so_rcv); 266177633Sdfr 267177633Sdfr ct->ct_record = NULL; 268177633Sdfr ct->ct_record_resid = 0; 269177633Sdfr TAILQ_INIT(&ct->ct_pending); 270177633Sdfr return (cl); 271177633Sdfr 272177633Sdfrerr: 273266243Sbrueffer if (ct) { 274266243Sbrueffer mtx_destroy(&ct->ct_lock); 275266243Sbrueffer mem_free(ct, sizeof (struct ct_data)); 276177633Sdfr } 277266243Sbrueffer if (cl) 278266243Sbrueffer mem_free(cl, sizeof (CLIENT)); 279177633Sdfr return ((CLIENT *)NULL); 280177633Sdfr} 281177633Sdfr 282177633Sdfrstatic enum clnt_stat 283177633Sdfrclnt_vc_call( 284184588Sdfr CLIENT *cl, /* client handle */ 285184588Sdfr struct rpc_callextra *ext, /* call metadata */ 286184588Sdfr rpcproc_t proc, /* procedure number */ 287184588Sdfr struct mbuf *args, /* pointer to args */ 288184588Sdfr struct mbuf **resultsp, /* pointer to results */ 289184588Sdfr struct timeval utimeout) 290177633Sdfr{ 291177633Sdfr struct ct_data *ct = (struct ct_data *) cl->cl_private; 292180025Sdfr AUTH *auth; 293184588Sdfr struct rpc_err *errp; 294184588Sdfr enum clnt_stat stat; 295177633Sdfr XDR xdrs; 296177633Sdfr struct rpc_msg reply_msg; 297177633Sdfr bool_t ok; 298177633Sdfr int nrefreshes = 2; /* number of times to refresh cred */ 299177633Sdfr struct timeval timeout; 300177633Sdfr uint32_t xid; 301184588Sdfr struct mbuf *mreq = NULL, *results; 302180025Sdfr struct ct_request *cr; 303177633Sdfr int error; 304177633Sdfr 305180025Sdfr cr = malloc(sizeof(struct ct_request), M_RPC, M_WAITOK); 306180025Sdfr 307177633Sdfr mtx_lock(&ct->ct_lock); 308177633Sdfr 309184588Sdfr if (ct->ct_closing || ct->ct_closed) { 310180025Sdfr mtx_unlock(&ct->ct_lock); 311180025Sdfr free(cr, M_RPC); 312180025Sdfr return (RPC_CANTSEND); 313180025Sdfr } 314180025Sdfr ct->ct_threads++; 315177633Sdfr 316184588Sdfr if (ext) { 317180025Sdfr auth = ext->rc_auth; 318184588Sdfr errp = &ext->rc_err; 319184588Sdfr } else { 320180025Sdfr auth = cl->cl_auth; 321184588Sdfr errp = &ct->ct_error; 322184588Sdfr } 323180025Sdfr 324180025Sdfr cr->cr_mrep = NULL; 325180025Sdfr cr->cr_error = 0; 326180025Sdfr 327177633Sdfr if (ct->ct_wait.tv_usec == -1) { 328177633Sdfr timeout = utimeout; /* use supplied timeout */ 329177633Sdfr } else { 330177633Sdfr timeout = ct->ct_wait; /* use default timeout */ 331177633Sdfr } 332177633Sdfr 333177633Sdfrcall_again: 334177633Sdfr mtx_assert(&ct->ct_lock, MA_OWNED); 335177633Sdfr 336177633Sdfr ct->ct_xid++; 337177633Sdfr xid = ct->ct_xid; 338177633Sdfr 339177633Sdfr mtx_unlock(&ct->ct_lock); 340177633Sdfr 341177633Sdfr /* 342177633Sdfr * Leave space to pre-pend the record mark. 343177633Sdfr */ 344248195Sglebius mreq = m_gethdr(M_WAITOK, MT_DATA); 345177633Sdfr mreq->m_data += sizeof(uint32_t); 346184588Sdfr KASSERT(ct->ct_mpos + sizeof(uint32_t) <= MHLEN, 347184588Sdfr ("RPC header too big")); 348184588Sdfr bcopy(ct->ct_mcallc, mreq->m_data, ct->ct_mpos); 349184588Sdfr mreq->m_len = ct->ct_mpos; 350177633Sdfr 351177633Sdfr /* 352177633Sdfr * The XID is the first thing in the request. 353177633Sdfr */ 354177633Sdfr *mtod(mreq, uint32_t *) = htonl(xid); 355177633Sdfr 356177633Sdfr xdrmbuf_create(&xdrs, mreq, XDR_ENCODE); 357177633Sdfr 358184588Sdfr errp->re_status = stat = RPC_SUCCESS; 359177633Sdfr 360177633Sdfr if ((! XDR_PUTINT32(&xdrs, &proc)) || 361184588Sdfr (! AUTH_MARSHALL(auth, xid, &xdrs, 362184588Sdfr m_copym(args, 0, M_COPYALL, M_WAITOK)))) { 363184588Sdfr errp->re_status = stat = RPC_CANTENCODEARGS; 364180025Sdfr mtx_lock(&ct->ct_lock); 365180025Sdfr goto out; 366177633Sdfr } 367184588Sdfr mreq->m_pkthdr.len = m_length(mreq, NULL); 368177633Sdfr 369177633Sdfr /* 370177633Sdfr * Prepend a record marker containing the packet length. 371177633Sdfr */ 372243882Sglebius M_PREPEND(mreq, sizeof(uint32_t), M_WAITOK); 373177633Sdfr *mtod(mreq, uint32_t *) = 374177633Sdfr htonl(0x80000000 | (mreq->m_pkthdr.len - sizeof(uint32_t))); 375177633Sdfr 376180025Sdfr cr->cr_xid = xid; 377177633Sdfr mtx_lock(&ct->ct_lock); 378199053Srmacklem /* 379199053Srmacklem * Check to see if the other end has already started to close down 380199053Srmacklem * the connection. The upcall will have set ct_error.re_status 381199053Srmacklem * to RPC_CANTRECV if this is the case. 382199053Srmacklem * If the other end starts to close down the connection after this 383199053Srmacklem * point, it will be detected later when cr_error is checked, 384199053Srmacklem * since the request is in the ct_pending queue. 385199053Srmacklem */ 386199053Srmacklem if (ct->ct_error.re_status == RPC_CANTRECV) { 387199053Srmacklem if (errp != &ct->ct_error) { 388199053Srmacklem errp->re_errno = ct->ct_error.re_errno; 389199053Srmacklem errp->re_status = RPC_CANTRECV; 390199053Srmacklem } 391199053Srmacklem stat = RPC_CANTRECV; 392199053Srmacklem goto out; 393199053Srmacklem } 394180025Sdfr TAILQ_INSERT_TAIL(&ct->ct_pending, cr, cr_link); 395177633Sdfr mtx_unlock(&ct->ct_lock); 396177633Sdfr 397177633Sdfr /* 398177633Sdfr * sosend consumes mreq. 399177633Sdfr */ 400177633Sdfr error = sosend(ct->ct_socket, NULL, NULL, mreq, NULL, 0, curthread); 401177633Sdfr mreq = NULL; 402184588Sdfr if (error == EMSGSIZE) { 403184588Sdfr SOCKBUF_LOCK(&ct->ct_socket->so_snd); 404184588Sdfr sbwait(&ct->ct_socket->so_snd); 405184588Sdfr SOCKBUF_UNLOCK(&ct->ct_socket->so_snd); 406184588Sdfr AUTH_VALIDATE(auth, xid, NULL, NULL); 407184588Sdfr mtx_lock(&ct->ct_lock); 408184588Sdfr TAILQ_REMOVE(&ct->ct_pending, cr, cr_link); 409184588Sdfr goto call_again; 410184588Sdfr } 411177633Sdfr 412184588Sdfr reply_msg.acpted_rply.ar_verf.oa_flavor = AUTH_NULL; 413184588Sdfr reply_msg.acpted_rply.ar_verf.oa_base = cr->cr_verf; 414184588Sdfr reply_msg.acpted_rply.ar_verf.oa_length = 0; 415184588Sdfr reply_msg.acpted_rply.ar_results.where = NULL; 416184588Sdfr reply_msg.acpted_rply.ar_results.proc = (xdrproc_t)xdr_void; 417177633Sdfr 418177633Sdfr mtx_lock(&ct->ct_lock); 419177633Sdfr if (error) { 420180025Sdfr TAILQ_REMOVE(&ct->ct_pending, cr, cr_link); 421184588Sdfr errp->re_errno = error; 422184588Sdfr errp->re_status = stat = RPC_CANTSEND; 423177633Sdfr goto out; 424177633Sdfr } 425177633Sdfr 426177633Sdfr /* 427177633Sdfr * Check to see if we got an upcall while waiting for the 428177633Sdfr * lock. In both these cases, the request has been removed 429177633Sdfr * from ct->ct_pending. 430177633Sdfr */ 431180025Sdfr if (cr->cr_error) { 432180025Sdfr TAILQ_REMOVE(&ct->ct_pending, cr, cr_link); 433184588Sdfr errp->re_errno = cr->cr_error; 434184588Sdfr errp->re_status = stat = RPC_CANTRECV; 435177633Sdfr goto out; 436177633Sdfr } 437180025Sdfr if (cr->cr_mrep) { 438180025Sdfr TAILQ_REMOVE(&ct->ct_pending, cr, cr_link); 439177633Sdfr goto got_reply; 440177633Sdfr } 441177633Sdfr 442177633Sdfr /* 443177633Sdfr * Hack to provide rpc-based message passing 444177633Sdfr */ 445177633Sdfr if (timeout.tv_sec == 0 && timeout.tv_usec == 0) { 446180025Sdfr TAILQ_REMOVE(&ct->ct_pending, cr, cr_link); 447184588Sdfr errp->re_status = stat = RPC_TIMEDOUT; 448177633Sdfr goto out; 449177633Sdfr } 450177633Sdfr 451180025Sdfr error = msleep(cr, &ct->ct_lock, ct->ct_waitflag, ct->ct_waitchan, 452177633Sdfr tvtohz(&timeout)); 453177633Sdfr 454180025Sdfr TAILQ_REMOVE(&ct->ct_pending, cr, cr_link); 455180025Sdfr 456177633Sdfr if (error) { 457177633Sdfr /* 458177633Sdfr * The sleep returned an error so our request is still 459177633Sdfr * on the list. Turn the error code into an 460177633Sdfr * appropriate client status. 461177633Sdfr */ 462184588Sdfr errp->re_errno = error; 463177633Sdfr switch (error) { 464177633Sdfr case EINTR: 465184588Sdfr stat = RPC_INTR; 466177633Sdfr break; 467177633Sdfr case EWOULDBLOCK: 468184588Sdfr stat = RPC_TIMEDOUT; 469177633Sdfr break; 470177633Sdfr default: 471184588Sdfr stat = RPC_CANTRECV; 472177633Sdfr } 473184588Sdfr errp->re_status = stat; 474177633Sdfr goto out; 475177633Sdfr } else { 476177633Sdfr /* 477177633Sdfr * We were woken up by the upcall. If the 478177633Sdfr * upcall had a receive error, report that, 479177633Sdfr * otherwise we have a reply. 480177633Sdfr */ 481180025Sdfr if (cr->cr_error) { 482184588Sdfr errp->re_errno = cr->cr_error; 483184588Sdfr errp->re_status = stat = RPC_CANTRECV; 484177633Sdfr goto out; 485177633Sdfr } 486177633Sdfr } 487177633Sdfr 488177633Sdfrgot_reply: 489177633Sdfr /* 490177633Sdfr * Now decode and validate the response. We need to drop the 491177633Sdfr * lock since xdr_replymsg may end up sleeping in malloc. 492177633Sdfr */ 493177633Sdfr mtx_unlock(&ct->ct_lock); 494177633Sdfr 495184588Sdfr if (ext && ext->rc_feedback) 496184588Sdfr ext->rc_feedback(FEEDBACK_OK, proc, ext->rc_feedback_arg); 497184588Sdfr 498180025Sdfr xdrmbuf_create(&xdrs, cr->cr_mrep, XDR_DECODE); 499177633Sdfr ok = xdr_replymsg(&xdrs, &reply_msg); 500180025Sdfr cr->cr_mrep = NULL; 501177633Sdfr 502177633Sdfr if (ok) { 503177633Sdfr if ((reply_msg.rm_reply.rp_stat == MSG_ACCEPTED) && 504184588Sdfr (reply_msg.acpted_rply.ar_stat == SUCCESS)) 505184588Sdfr errp->re_status = stat = RPC_SUCCESS; 506177633Sdfr else 507184588Sdfr stat = _seterr_reply(&reply_msg, errp); 508177633Sdfr 509184588Sdfr if (stat == RPC_SUCCESS) { 510184588Sdfr results = xdrmbuf_getall(&xdrs); 511184588Sdfr if (!AUTH_VALIDATE(auth, xid, 512184588Sdfr &reply_msg.acpted_rply.ar_verf, 513184588Sdfr &results)) { 514184588Sdfr errp->re_status = stat = RPC_AUTHERROR; 515184588Sdfr errp->re_why = AUTH_INVALIDRESP; 516184588Sdfr } else { 517184588Sdfr KASSERT(results, 518184588Sdfr ("auth validated but no result")); 519184588Sdfr *resultsp = results; 520177633Sdfr } 521177633Sdfr } /* end successful completion */ 522177633Sdfr /* 523177633Sdfr * If unsuccesful AND error is an authentication error 524177633Sdfr * then refresh credentials and try again, else break 525177633Sdfr */ 526184588Sdfr else if (stat == RPC_AUTHERROR) 527177633Sdfr /* maybe our credentials need to be refreshed ... */ 528177633Sdfr if (nrefreshes > 0 && 529184588Sdfr AUTH_REFRESH(auth, &reply_msg)) { 530177633Sdfr nrefreshes--; 531184588Sdfr XDR_DESTROY(&xdrs); 532184588Sdfr mtx_lock(&ct->ct_lock); 533177633Sdfr goto call_again; 534177633Sdfr } 535177633Sdfr /* end of unsuccessful completion */ 536177633Sdfr } /* end of valid reply message */ 537177633Sdfr else { 538184588Sdfr errp->re_status = stat = RPC_CANTDECODERES; 539177633Sdfr } 540184588Sdfr XDR_DESTROY(&xdrs); 541184588Sdfr mtx_lock(&ct->ct_lock); 542177633Sdfrout: 543177633Sdfr mtx_assert(&ct->ct_lock, MA_OWNED); 544177633Sdfr 545184588Sdfr KASSERT(stat != RPC_SUCCESS || *resultsp, 546184588Sdfr ("RPC_SUCCESS without reply")); 547184588Sdfr 548177633Sdfr if (mreq) 549177633Sdfr m_freem(mreq); 550180025Sdfr if (cr->cr_mrep) 551180025Sdfr m_freem(cr->cr_mrep); 552177633Sdfr 553180025Sdfr ct->ct_threads--; 554180025Sdfr if (ct->ct_closing) 555180025Sdfr wakeup(ct); 556180025Sdfr 557177633Sdfr mtx_unlock(&ct->ct_lock); 558180025Sdfr 559184588Sdfr if (auth && stat != RPC_SUCCESS) 560184588Sdfr AUTH_VALIDATE(auth, xid, NULL, NULL); 561184588Sdfr 562180025Sdfr free(cr, M_RPC); 563180025Sdfr 564184588Sdfr return (stat); 565177633Sdfr} 566177633Sdfr 567177633Sdfrstatic void 568177633Sdfrclnt_vc_geterr(CLIENT *cl, struct rpc_err *errp) 569177633Sdfr{ 570177633Sdfr struct ct_data *ct = (struct ct_data *) cl->cl_private; 571177633Sdfr 572177633Sdfr *errp = ct->ct_error; 573177633Sdfr} 574177633Sdfr 575177633Sdfrstatic bool_t 576177633Sdfrclnt_vc_freeres(CLIENT *cl, xdrproc_t xdr_res, void *res_ptr) 577177633Sdfr{ 578177633Sdfr XDR xdrs; 579177633Sdfr bool_t dummy; 580177633Sdfr 581177633Sdfr xdrs.x_op = XDR_FREE; 582177633Sdfr dummy = (*xdr_res)(&xdrs, res_ptr); 583177633Sdfr 584177633Sdfr return (dummy); 585177633Sdfr} 586177633Sdfr 587177633Sdfr/*ARGSUSED*/ 588177633Sdfrstatic void 589177633Sdfrclnt_vc_abort(CLIENT *cl) 590177633Sdfr{ 591177633Sdfr} 592177633Sdfr 593177633Sdfrstatic bool_t 594177633Sdfrclnt_vc_control(CLIENT *cl, u_int request, void *info) 595177633Sdfr{ 596177633Sdfr struct ct_data *ct = (struct ct_data *)cl->cl_private; 597177633Sdfr void *infop = info; 598244008Srmacklem SVCXPRT *xprt; 599177633Sdfr 600177633Sdfr mtx_lock(&ct->ct_lock); 601177633Sdfr 602177633Sdfr switch (request) { 603177633Sdfr case CLSET_FD_CLOSE: 604177633Sdfr ct->ct_closeit = TRUE; 605177633Sdfr mtx_unlock(&ct->ct_lock); 606177633Sdfr return (TRUE); 607177633Sdfr case CLSET_FD_NCLOSE: 608177633Sdfr ct->ct_closeit = FALSE; 609177633Sdfr mtx_unlock(&ct->ct_lock); 610177633Sdfr return (TRUE); 611177633Sdfr default: 612177633Sdfr break; 613177633Sdfr } 614177633Sdfr 615177633Sdfr /* for other requests which use info */ 616177633Sdfr if (info == NULL) { 617177633Sdfr mtx_unlock(&ct->ct_lock); 618177633Sdfr return (FALSE); 619177633Sdfr } 620177633Sdfr switch (request) { 621177633Sdfr case CLSET_TIMEOUT: 622177633Sdfr if (time_not_ok((struct timeval *)info)) { 623177633Sdfr mtx_unlock(&ct->ct_lock); 624177633Sdfr return (FALSE); 625177633Sdfr } 626177633Sdfr ct->ct_wait = *(struct timeval *)infop; 627177633Sdfr break; 628177633Sdfr case CLGET_TIMEOUT: 629177633Sdfr *(struct timeval *)infop = ct->ct_wait; 630177633Sdfr break; 631177633Sdfr case CLGET_SERVER_ADDR: 632177633Sdfr (void) memcpy(info, &ct->ct_addr, (size_t)ct->ct_addr.ss_len); 633177633Sdfr break; 634177633Sdfr case CLGET_SVC_ADDR: 635177633Sdfr /* 636177633Sdfr * Slightly different semantics to userland - we use 637177633Sdfr * sockaddr instead of netbuf. 638177633Sdfr */ 639177633Sdfr memcpy(info, &ct->ct_addr, ct->ct_addr.ss_len); 640177633Sdfr break; 641177633Sdfr case CLSET_SVC_ADDR: /* set to new address */ 642177633Sdfr mtx_unlock(&ct->ct_lock); 643177633Sdfr return (FALSE); 644177633Sdfr case CLGET_XID: 645177633Sdfr *(uint32_t *)info = ct->ct_xid; 646177633Sdfr break; 647177633Sdfr case CLSET_XID: 648177633Sdfr /* This will set the xid of the NEXT call */ 649177633Sdfr /* decrement by 1 as clnt_vc_call() increments once */ 650177633Sdfr ct->ct_xid = *(uint32_t *)info - 1; 651177633Sdfr break; 652177633Sdfr case CLGET_VERS: 653177633Sdfr /* 654177633Sdfr * This RELIES on the information that, in the call body, 655177633Sdfr * the version number field is the fifth field from the 656177633Sdfr * begining of the RPC header. MUST be changed if the 657177633Sdfr * call_struct is changed 658177633Sdfr */ 659177633Sdfr *(uint32_t *)info = 660177633Sdfr ntohl(*(uint32_t *)(void *)(ct->ct_mcallc + 661177633Sdfr 4 * BYTES_PER_XDR_UNIT)); 662177633Sdfr break; 663177633Sdfr 664177633Sdfr case CLSET_VERS: 665177633Sdfr *(uint32_t *)(void *)(ct->ct_mcallc + 666177633Sdfr 4 * BYTES_PER_XDR_UNIT) = 667177633Sdfr htonl(*(uint32_t *)info); 668177633Sdfr break; 669177633Sdfr 670177633Sdfr case CLGET_PROG: 671177633Sdfr /* 672177633Sdfr * This RELIES on the information that, in the call body, 673177633Sdfr * the program number field is the fourth field from the 674177633Sdfr * begining of the RPC header. MUST be changed if the 675177633Sdfr * call_struct is changed 676177633Sdfr */ 677177633Sdfr *(uint32_t *)info = 678177633Sdfr ntohl(*(uint32_t *)(void *)(ct->ct_mcallc + 679177633Sdfr 3 * BYTES_PER_XDR_UNIT)); 680177633Sdfr break; 681177633Sdfr 682177633Sdfr case CLSET_PROG: 683177633Sdfr *(uint32_t *)(void *)(ct->ct_mcallc + 684177633Sdfr 3 * BYTES_PER_XDR_UNIT) = 685177633Sdfr htonl(*(uint32_t *)info); 686177633Sdfr break; 687177633Sdfr 688177633Sdfr case CLSET_WAITCHAN: 689184588Sdfr ct->ct_waitchan = (const char *)info; 690177633Sdfr break; 691177633Sdfr 692177633Sdfr case CLGET_WAITCHAN: 693177633Sdfr *(const char **) info = ct->ct_waitchan; 694177633Sdfr break; 695177633Sdfr 696177633Sdfr case CLSET_INTERRUPTIBLE: 697177633Sdfr if (*(int *) info) 698248255Sjhb ct->ct_waitflag = PCATCH; 699177633Sdfr else 700177633Sdfr ct->ct_waitflag = 0; 701177633Sdfr break; 702177633Sdfr 703177633Sdfr case CLGET_INTERRUPTIBLE: 704177633Sdfr if (ct->ct_waitflag) 705177633Sdfr *(int *) info = TRUE; 706177633Sdfr else 707177633Sdfr *(int *) info = FALSE; 708177633Sdfr break; 709177633Sdfr 710244008Srmacklem case CLSET_BACKCHANNEL: 711244008Srmacklem xprt = (SVCXPRT *)info; 712244008Srmacklem if (ct->ct_backchannelxprt == NULL) { 713244008Srmacklem xprt->xp_p2 = ct; 714244008Srmacklem ct->ct_backchannelxprt = xprt; 715244008Srmacklem } 716244008Srmacklem break; 717244008Srmacklem 718177633Sdfr default: 719177633Sdfr mtx_unlock(&ct->ct_lock); 720177633Sdfr return (FALSE); 721177633Sdfr } 722177633Sdfr 723177633Sdfr mtx_unlock(&ct->ct_lock); 724177633Sdfr return (TRUE); 725177633Sdfr} 726177633Sdfr 727177633Sdfrstatic void 728184588Sdfrclnt_vc_close(CLIENT *cl) 729177633Sdfr{ 730177633Sdfr struct ct_data *ct = (struct ct_data *) cl->cl_private; 731180025Sdfr struct ct_request *cr; 732177633Sdfr 733177633Sdfr mtx_lock(&ct->ct_lock); 734177633Sdfr 735184588Sdfr if (ct->ct_closed) { 736184588Sdfr mtx_unlock(&ct->ct_lock); 737184588Sdfr return; 738184588Sdfr } 739184588Sdfr 740184588Sdfr if (ct->ct_closing) { 741184588Sdfr while (ct->ct_closing) 742184588Sdfr msleep(ct, &ct->ct_lock, 0, "rpcclose", 0); 743184588Sdfr KASSERT(ct->ct_closed, ("client should be closed")); 744184588Sdfr mtx_unlock(&ct->ct_lock); 745184588Sdfr return; 746184588Sdfr } 747184588Sdfr 748177633Sdfr if (ct->ct_socket) { 749193272Sjhb ct->ct_closing = TRUE; 750193272Sjhb mtx_unlock(&ct->ct_lock); 751193272Sjhb 752177633Sdfr SOCKBUF_LOCK(&ct->ct_socket->so_rcv); 753193272Sjhb soupcall_clear(ct->ct_socket, SO_RCV); 754193437Srmacklem clnt_vc_upcallsdone(ct); 755177633Sdfr SOCKBUF_UNLOCK(&ct->ct_socket->so_rcv); 756177633Sdfr 757180025Sdfr /* 758180025Sdfr * Abort any pending requests and wait until everyone 759180025Sdfr * has finished with clnt_vc_call. 760180025Sdfr */ 761193272Sjhb mtx_lock(&ct->ct_lock); 762180025Sdfr TAILQ_FOREACH(cr, &ct->ct_pending, cr_link) { 763180025Sdfr cr->cr_xid = 0; 764180025Sdfr cr->cr_error = ESHUTDOWN; 765180025Sdfr wakeup(cr); 766180025Sdfr } 767177633Sdfr 768180025Sdfr while (ct->ct_threads) 769180025Sdfr msleep(ct, &ct->ct_lock, 0, "rpcclose", 0); 770184588Sdfr } 771180025Sdfr 772184588Sdfr ct->ct_closing = FALSE; 773184588Sdfr ct->ct_closed = TRUE; 774184588Sdfr mtx_unlock(&ct->ct_lock); 775184588Sdfr wakeup(ct); 776184588Sdfr} 777184588Sdfr 778184588Sdfrstatic void 779184588Sdfrclnt_vc_destroy(CLIENT *cl) 780184588Sdfr{ 781184588Sdfr struct ct_data *ct = (struct ct_data *) cl->cl_private; 782184588Sdfr struct socket *so = NULL; 783244008Srmacklem SVCXPRT *xprt; 784184588Sdfr 785184588Sdfr clnt_vc_close(cl); 786184588Sdfr 787184588Sdfr mtx_lock(&ct->ct_lock); 788244008Srmacklem xprt = ct->ct_backchannelxprt; 789244008Srmacklem ct->ct_backchannelxprt = NULL; 790244008Srmacklem if (xprt != NULL) { 791244008Srmacklem mtx_unlock(&ct->ct_lock); /* To avoid a LOR. */ 792244008Srmacklem sx_xlock(&xprt->xp_lock); 793244008Srmacklem mtx_lock(&ct->ct_lock); 794244008Srmacklem xprt->xp_p2 = NULL; 795244008Srmacklem xprt_unregister(xprt); 796244008Srmacklem } 797184588Sdfr 798184588Sdfr if (ct->ct_socket) { 799177633Sdfr if (ct->ct_closeit) { 800177633Sdfr so = ct->ct_socket; 801177633Sdfr } 802177633Sdfr } 803177633Sdfr 804177633Sdfr mtx_unlock(&ct->ct_lock); 805244008Srmacklem if (xprt != NULL) { 806244008Srmacklem sx_xunlock(&xprt->xp_lock); 807244008Srmacklem SVC_RELEASE(xprt); 808244008Srmacklem } 809177633Sdfr 810177633Sdfr mtx_destroy(&ct->ct_lock); 811177633Sdfr if (so) { 812177633Sdfr soshutdown(so, SHUT_WR); 813177633Sdfr soclose(so); 814177633Sdfr } 815177633Sdfr mem_free(ct, sizeof(struct ct_data)); 816241143Spfg if (cl->cl_netid && cl->cl_netid[0]) 817241143Spfg mem_free(cl->cl_netid, strlen(cl->cl_netid) +1); 818241143Spfg if (cl->cl_tp && cl->cl_tp[0]) 819241143Spfg mem_free(cl->cl_tp, strlen(cl->cl_tp) +1); 820177633Sdfr mem_free(cl, sizeof(CLIENT)); 821177633Sdfr} 822177633Sdfr 823177633Sdfr/* 824177633Sdfr * Make sure that the time is not garbage. -1 value is disallowed. 825177633Sdfr * Note this is different from time_not_ok in clnt_dg.c 826177633Sdfr */ 827177633Sdfrstatic bool_t 828177633Sdfrtime_not_ok(struct timeval *t) 829177633Sdfr{ 830177633Sdfr return (t->tv_sec <= -1 || t->tv_sec > 100000000 || 831177633Sdfr t->tv_usec <= -1 || t->tv_usec > 1000000); 832177633Sdfr} 833177633Sdfr 834193272Sjhbint 835177633Sdfrclnt_vc_soupcall(struct socket *so, void *arg, int waitflag) 836177633Sdfr{ 837177633Sdfr struct ct_data *ct = (struct ct_data *) arg; 838177633Sdfr struct uio uio; 839244008Srmacklem struct mbuf *m, *m2; 840177633Sdfr struct ct_request *cr; 841177633Sdfr int error, rcvflag, foundreq; 842244008Srmacklem uint32_t xid_plus_direction[2], header; 843184588Sdfr bool_t do_read; 844244008Srmacklem SVCXPRT *xprt; 845244008Srmacklem struct cf_conn *cd; 846177633Sdfr 847244008Srmacklem CTASSERT(sizeof(xid_plus_direction) == 2 * sizeof(uint32_t)); 848193437Srmacklem ct->ct_upcallrefs++; 849177633Sdfr uio.uio_td = curthread; 850177633Sdfr do { 851177633Sdfr /* 852177633Sdfr * If ct_record_resid is zero, we are waiting for a 853177633Sdfr * record mark. 854177633Sdfr */ 855177633Sdfr if (ct->ct_record_resid == 0) { 856177633Sdfr 857177633Sdfr /* 858177633Sdfr * Make sure there is either a whole record 859177633Sdfr * mark in the buffer or there is some other 860177633Sdfr * error condition 861177633Sdfr */ 862177633Sdfr do_read = FALSE; 863177633Sdfr if (so->so_rcv.sb_cc >= sizeof(uint32_t) 864177633Sdfr || (so->so_rcv.sb_state & SBS_CANTRCVMORE) 865177633Sdfr || so->so_error) 866177633Sdfr do_read = TRUE; 867177633Sdfr 868177633Sdfr if (!do_read) 869193437Srmacklem break; 870177633Sdfr 871193272Sjhb SOCKBUF_UNLOCK(&so->so_rcv); 872177633Sdfr uio.uio_resid = sizeof(uint32_t); 873177633Sdfr m = NULL; 874177633Sdfr rcvflag = MSG_DONTWAIT | MSG_SOCALLBCK; 875177633Sdfr error = soreceive(so, NULL, &uio, &m, NULL, &rcvflag); 876193272Sjhb SOCKBUF_LOCK(&so->so_rcv); 877177633Sdfr 878177633Sdfr if (error == EWOULDBLOCK) 879177633Sdfr break; 880177633Sdfr 881177633Sdfr /* 882177633Sdfr * If there was an error, wake up all pending 883177633Sdfr * requests. 884177633Sdfr */ 885177633Sdfr if (error || uio.uio_resid > 0) { 886177633Sdfr wakeup_all: 887177633Sdfr mtx_lock(&ct->ct_lock); 888177633Sdfr if (!error) { 889177633Sdfr /* 890177633Sdfr * We must have got EOF trying 891177633Sdfr * to read from the stream. 892177633Sdfr */ 893177633Sdfr error = ECONNRESET; 894177633Sdfr } 895177633Sdfr ct->ct_error.re_status = RPC_CANTRECV; 896177633Sdfr ct->ct_error.re_errno = error; 897177633Sdfr TAILQ_FOREACH(cr, &ct->ct_pending, cr_link) { 898177633Sdfr cr->cr_error = error; 899177633Sdfr wakeup(cr); 900177633Sdfr } 901177633Sdfr mtx_unlock(&ct->ct_lock); 902177633Sdfr break; 903177633Sdfr } 904217242Srmacklem m_copydata(m, 0, sizeof(uint32_t), (char *)&header); 905177633Sdfr header = ntohl(header); 906177633Sdfr ct->ct_record = NULL; 907177633Sdfr ct->ct_record_resid = header & 0x7fffffff; 908177633Sdfr ct->ct_record_eor = ((header & 0x80000000) != 0); 909177633Sdfr m_freem(m); 910177633Sdfr } else { 911177633Sdfr /* 912184588Sdfr * Wait until the socket has the whole record 913184588Sdfr * buffered. 914184588Sdfr */ 915184588Sdfr do_read = FALSE; 916184588Sdfr if (so->so_rcv.sb_cc >= ct->ct_record_resid 917184588Sdfr || (so->so_rcv.sb_state & SBS_CANTRCVMORE) 918184588Sdfr || so->so_error) 919184588Sdfr do_read = TRUE; 920184588Sdfr 921184588Sdfr if (!do_read) 922193437Srmacklem break; 923184588Sdfr 924184588Sdfr /* 925177633Sdfr * We have the record mark. Read as much as 926177633Sdfr * the socket has buffered up to the end of 927177633Sdfr * this record. 928177633Sdfr */ 929193272Sjhb SOCKBUF_UNLOCK(&so->so_rcv); 930177633Sdfr uio.uio_resid = ct->ct_record_resid; 931177633Sdfr m = NULL; 932177633Sdfr rcvflag = MSG_DONTWAIT | MSG_SOCALLBCK; 933177633Sdfr error = soreceive(so, NULL, &uio, &m, NULL, &rcvflag); 934193272Sjhb SOCKBUF_LOCK(&so->so_rcv); 935177633Sdfr 936177633Sdfr if (error == EWOULDBLOCK) 937177633Sdfr break; 938177633Sdfr 939177633Sdfr if (error || uio.uio_resid == ct->ct_record_resid) 940177633Sdfr goto wakeup_all; 941177633Sdfr 942177633Sdfr /* 943177633Sdfr * If we have part of the record already, 944177633Sdfr * chain this bit onto the end. 945177633Sdfr */ 946177633Sdfr if (ct->ct_record) 947177633Sdfr m_last(ct->ct_record)->m_next = m; 948177633Sdfr else 949177633Sdfr ct->ct_record = m; 950177633Sdfr 951177633Sdfr ct->ct_record_resid = uio.uio_resid; 952177633Sdfr 953177633Sdfr /* 954177633Sdfr * If we have the entire record, see if we can 955177633Sdfr * match it to a request. 956177633Sdfr */ 957177633Sdfr if (ct->ct_record_resid == 0 958177633Sdfr && ct->ct_record_eor) { 959177633Sdfr /* 960177633Sdfr * The XID is in the first uint32_t of 961244008Srmacklem * the reply and the message direction 962244008Srmacklem * is the second one. 963177633Sdfr */ 964244008Srmacklem if (ct->ct_record->m_len < 965244008Srmacklem sizeof(xid_plus_direction) && 966220585Srmacklem m_length(ct->ct_record, NULL) < 967244008Srmacklem sizeof(xid_plus_direction)) { 968220585Srmacklem m_freem(ct->ct_record); 969177633Sdfr break; 970220585Srmacklem } 971244008Srmacklem m_copydata(ct->ct_record, 0, 972244008Srmacklem sizeof(xid_plus_direction), 973244008Srmacklem (char *)xid_plus_direction); 974244008Srmacklem xid_plus_direction[0] = 975244008Srmacklem ntohl(xid_plus_direction[0]); 976244008Srmacklem xid_plus_direction[1] = 977244008Srmacklem ntohl(xid_plus_direction[1]); 978244008Srmacklem /* Check message direction. */ 979244008Srmacklem if (xid_plus_direction[1] == CALL) { 980244008Srmacklem /* This is a backchannel request. */ 981244008Srmacklem mtx_lock(&ct->ct_lock); 982244008Srmacklem xprt = ct->ct_backchannelxprt; 983244008Srmacklem if (xprt == NULL) { 984244008Srmacklem mtx_unlock(&ct->ct_lock); 985244008Srmacklem /* Just throw it away. */ 986244008Srmacklem m_freem(ct->ct_record); 987244008Srmacklem ct->ct_record = NULL; 988244008Srmacklem } else { 989244008Srmacklem cd = (struct cf_conn *) 990244008Srmacklem xprt->xp_p1; 991244008Srmacklem m2 = cd->mreq; 992177633Sdfr /* 993244008Srmacklem * The requests are chained 994244008Srmacklem * in the m_nextpkt list. 995177633Sdfr */ 996244008Srmacklem while (m2 != NULL && 997244008Srmacklem m2->m_nextpkt != NULL) 998244008Srmacklem /* Find end of list. */ 999244008Srmacklem m2 = m2->m_nextpkt; 1000244008Srmacklem if (m2 != NULL) 1001244008Srmacklem m2->m_nextpkt = 1002244008Srmacklem ct->ct_record; 1003244008Srmacklem else 1004244008Srmacklem cd->mreq = 1005244008Srmacklem ct->ct_record; 1006244008Srmacklem ct->ct_record->m_nextpkt = 1007244008Srmacklem NULL; 1008244008Srmacklem ct->ct_record = NULL; 1009244008Srmacklem xprt_active(xprt); 1010244008Srmacklem mtx_unlock(&ct->ct_lock); 1011177633Sdfr } 1012244008Srmacklem } else { 1013244008Srmacklem mtx_lock(&ct->ct_lock); 1014244008Srmacklem foundreq = 0; 1015244008Srmacklem TAILQ_FOREACH(cr, &ct->ct_pending, 1016244008Srmacklem cr_link) { 1017244008Srmacklem if (cr->cr_xid == 1018244008Srmacklem xid_plus_direction[0]) { 1019244008Srmacklem /* 1020244008Srmacklem * This one 1021244008Srmacklem * matches. We leave 1022244008Srmacklem * the reply mbuf in 1023244008Srmacklem * cr->cr_mrep. Set 1024244008Srmacklem * the XID to zero so 1025244008Srmacklem * that we will ignore 1026244008Srmacklem * any duplicated 1027244008Srmacklem * replies. 1028244008Srmacklem */ 1029244008Srmacklem cr->cr_xid = 0; 1030244008Srmacklem cr->cr_mrep = 1031244008Srmacklem ct->ct_record; 1032244008Srmacklem cr->cr_error = 0; 1033244008Srmacklem foundreq = 1; 1034244008Srmacklem wakeup(cr); 1035244008Srmacklem break; 1036244008Srmacklem } 1037244008Srmacklem } 1038244008Srmacklem mtx_unlock(&ct->ct_lock); 1039244008Srmacklem 1040244008Srmacklem if (!foundreq) 1041244008Srmacklem m_freem(ct->ct_record); 1042244008Srmacklem ct->ct_record = NULL; 1043177633Sdfr } 1044177633Sdfr } 1045177633Sdfr } 1046177633Sdfr } while (m); 1047193437Srmacklem ct->ct_upcallrefs--; 1048193437Srmacklem if (ct->ct_upcallrefs < 0) 1049193437Srmacklem panic("rpcvc upcall refcnt"); 1050193437Srmacklem if (ct->ct_upcallrefs == 0) 1051193437Srmacklem wakeup(&ct->ct_upcallrefs); 1052193272Sjhb return (SU_OK); 1053177633Sdfr} 1054193437Srmacklem 1055193437Srmacklem/* 1056193437Srmacklem * Wait for all upcalls in progress to complete. 1057193437Srmacklem */ 1058193437Srmacklemstatic void 1059193437Srmacklemclnt_vc_upcallsdone(struct ct_data *ct) 1060193437Srmacklem{ 1061193437Srmacklem 1062193437Srmacklem SOCKBUF_LOCK_ASSERT(&ct->ct_socket->so_rcv); 1063193437Srmacklem 1064193437Srmacklem while (ct->ct_upcallrefs > 0) 1065193437Srmacklem (void) msleep(&ct->ct_upcallrefs, 1066193437Srmacklem SOCKBUF_MTX(&ct->ct_socket->so_rcv), 0, "rpcvcup", 0); 1067193437Srmacklem} 1068