1177633Sdfr/* $NetBSD: clnt_vc.c,v 1.4 2000/07/14 08:40:42 fvdl Exp $ */ 2177633Sdfr 3177633Sdfr/* 4177633Sdfr * Sun RPC is a product of Sun Microsystems, Inc. and is provided for 5177633Sdfr * unrestricted use provided that this legend is included on all tape 6177633Sdfr * media and as a part of the software program in whole or part. Users 7177633Sdfr * may copy or modify Sun RPC without charge, but are not authorized 8177633Sdfr * to license or distribute it to anyone else except as part of a product or 9177633Sdfr * program developed by the user. 10177633Sdfr * 11177633Sdfr * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE 12177633Sdfr * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR 13177633Sdfr * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. 14177633Sdfr * 15177633Sdfr * Sun RPC is provided with no support and without any obligation on the 16177633Sdfr * part of Sun Microsystems, Inc. to assist in its use, correction, 17177633Sdfr * modification or enhancement. 18177633Sdfr * 19177633Sdfr * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE 20177633Sdfr * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC 21177633Sdfr * OR ANY PART THEREOF. 22177633Sdfr * 23177633Sdfr * In no event will Sun Microsystems, Inc. be liable for any lost revenue 24177633Sdfr * or profits or other special, indirect and consequential damages, even if 25177633Sdfr * Sun has been advised of the possibility of such damages. 26177633Sdfr * 27177633Sdfr * Sun Microsystems, Inc. 28177633Sdfr * 2550 Garcia Avenue 29177633Sdfr * Mountain View, California 94043 30177633Sdfr */ 31177633Sdfr 32177633Sdfr#if defined(LIBC_SCCS) && !defined(lint) 33177633Sdfrstatic char *sccsid2 = "@(#)clnt_tcp.c 1.37 87/10/05 Copyr 1984 Sun Micro"; 34177633Sdfrstatic char *sccsid = "@(#)clnt_tcp.c 2.2 88/08/01 4.0 RPCSRC"; 35177633Sdfrstatic char sccsid3[] = "@(#)clnt_vc.c 1.19 89/03/16 Copyr 1988 Sun Micro"; 36177633Sdfr#endif 37177633Sdfr#include <sys/cdefs.h> 38177633Sdfr__FBSDID("$FreeBSD$"); 39177633Sdfr 40177633Sdfr/* 41177633Sdfr * clnt_tcp.c, Implements a TCP/IP based, client side RPC. 42177633Sdfr * 43177633Sdfr * Copyright (C) 1984, Sun Microsystems, Inc. 44177633Sdfr * 45177633Sdfr * TCP based RPC supports 'batched calls'. 46177633Sdfr * A sequence of calls may be batched-up in a send buffer. The rpc call 47177633Sdfr * return immediately to the client even though the call was not necessarily 48177633Sdfr * sent. The batching occurs if the results' xdr routine is NULL (0) AND 49177633Sdfr * the rpc timeout value is zero (see clnt.h, rpc). 50177633Sdfr * 51177633Sdfr * Clients should NOT casually batch calls that in fact return results; that is, 52177633Sdfr * the server side should be aware that a call is batched and not produce any 53177633Sdfr * return message. Batched calls that produce many result messages can 54177633Sdfr * deadlock (netlock) the client and the server.... 55177633Sdfr * 56177633Sdfr * Now go hang yourself. 57177633Sdfr */ 58177633Sdfr 59177633Sdfr#include <sys/param.h> 60177633Sdfr#include <sys/systm.h> 61177633Sdfr#include <sys/lock.h> 62177633Sdfr#include <sys/malloc.h> 63177633Sdfr#include <sys/mbuf.h> 64177633Sdfr#include <sys/mutex.h> 65177633Sdfr#include <sys/pcpu.h> 66177633Sdfr#include <sys/proc.h> 67184588Sdfr#include <sys/protosw.h> 68177633Sdfr#include <sys/socket.h> 69177633Sdfr#include <sys/socketvar.h> 70244008Srmacklem#include <sys/sx.h> 71177633Sdfr#include <sys/syslog.h> 72177633Sdfr#include <sys/time.h> 73177633Sdfr#include <sys/uio.h> 74196503Szec 75196503Szec#include <net/vnet.h> 76196503Szec 77184588Sdfr#include <netinet/tcp.h> 78177633Sdfr 79177633Sdfr#include <rpc/rpc.h> 80177685Sdfr#include <rpc/rpc_com.h> 81244008Srmacklem#include <rpc/krpc.h> 82177633Sdfr 83177633Sdfrstruct cmessage { 84177633Sdfr struct cmsghdr cmsg; 85177633Sdfr struct cmsgcred cmcred; 86177633Sdfr}; 87177633Sdfr 88180025Sdfrstatic enum clnt_stat clnt_vc_call(CLIENT *, struct rpc_callextra *, 89184588Sdfr rpcproc_t, struct mbuf *, struct mbuf **, struct timeval); 90177633Sdfrstatic void clnt_vc_geterr(CLIENT *, struct rpc_err *); 91177633Sdfrstatic bool_t clnt_vc_freeres(CLIENT *, xdrproc_t, void *); 92177633Sdfrstatic void clnt_vc_abort(CLIENT *); 93177633Sdfrstatic bool_t clnt_vc_control(CLIENT *, u_int, void *); 94184588Sdfrstatic void clnt_vc_close(CLIENT *); 95177633Sdfrstatic void clnt_vc_destroy(CLIENT *); 96177633Sdfrstatic bool_t time_not_ok(struct timeval *); 97193272Sjhbstatic int clnt_vc_soupcall(struct socket *so, void *arg, int waitflag); 98177633Sdfr 99177633Sdfrstatic struct clnt_ops clnt_vc_ops = { 100177633Sdfr .cl_call = clnt_vc_call, 101177633Sdfr .cl_abort = clnt_vc_abort, 102177633Sdfr .cl_geterr = clnt_vc_geterr, 103177633Sdfr .cl_freeres = clnt_vc_freeres, 104184588Sdfr .cl_close = clnt_vc_close, 105177633Sdfr .cl_destroy = clnt_vc_destroy, 106177633Sdfr .cl_control = clnt_vc_control 107177633Sdfr}; 108177633Sdfr 109193437Srmacklemstatic void clnt_vc_upcallsdone(struct ct_data *); 110193437Srmacklem 111177633Sdfrstatic const char clnt_vc_errstr[] = "%s : %s"; 112177633Sdfrstatic const char clnt_vc_str[] = "clnt_vc_create"; 113177633Sdfrstatic const char clnt_read_vc_str[] = "read_vc"; 114177633Sdfrstatic const char __no_mem_str[] = "out of memory"; 115177633Sdfr 116177633Sdfr/* 117177633Sdfr * Create a client handle for a connection. 118177633Sdfr * Default options are set, which the user can change using clnt_control()'s. 119177633Sdfr * The rpc/vc package does buffering similar to stdio, so the client 120177633Sdfr * must pick send and receive buffer sizes, 0 => use the default. 121177633Sdfr * NB: fd is copied into a private area. 122177633Sdfr * NB: The rpch->cl_auth is set null authentication. Caller may wish to 123177633Sdfr * set this something more useful. 124177633Sdfr * 125177633Sdfr * fd should be an open socket 126177633Sdfr */ 127177633SdfrCLIENT * 128177633Sdfrclnt_vc_create( 129177633Sdfr struct socket *so, /* open file descriptor */ 130177633Sdfr struct sockaddr *raddr, /* servers address */ 131177633Sdfr const rpcprog_t prog, /* program number */ 132177633Sdfr const rpcvers_t vers, /* version number */ 133177633Sdfr size_t sendsz, /* buffer recv size */ 134221127Srmacklem size_t recvsz, /* buffer send size */ 135221127Srmacklem int intrflag) /* interruptible */ 136177633Sdfr{ 137177633Sdfr CLIENT *cl; /* client handle */ 138177633Sdfr struct ct_data *ct = NULL; /* client handle */ 139177633Sdfr struct timeval now; 140177633Sdfr struct rpc_msg call_msg; 141177633Sdfr static uint32_t disrupt; 142177633Sdfr struct __rpc_sockinfo si; 143177633Sdfr XDR xdrs; 144221127Srmacklem int error, interrupted, one = 1, sleep_flag; 145184588Sdfr struct sockopt sopt; 146177633Sdfr 147177633Sdfr if (disrupt == 0) 148177633Sdfr disrupt = (uint32_t)(long)raddr; 149177633Sdfr 150177633Sdfr cl = (CLIENT *)mem_alloc(sizeof (*cl)); 151177633Sdfr ct = (struct ct_data *)mem_alloc(sizeof (*ct)); 152177633Sdfr 153177633Sdfr mtx_init(&ct->ct_lock, "ct->ct_lock", NULL, MTX_DEF); 154180025Sdfr ct->ct_threads = 0; 155180025Sdfr ct->ct_closing = FALSE; 156184588Sdfr ct->ct_closed = FALSE; 157193437Srmacklem ct->ct_upcallrefs = 0; 158177633Sdfr 159177633Sdfr if ((so->so_state & (SS_ISCONNECTED|SS_ISCONFIRMING)) == 0) { 160177633Sdfr error = soconnect(so, raddr, curthread); 161180025Sdfr SOCK_LOCK(so); 162180025Sdfr interrupted = 0; 163221127Srmacklem sleep_flag = PSOCK; 164221127Srmacklem if (intrflag != 0) 165248255Sjhb sleep_flag |= PCATCH; 166180025Sdfr while ((so->so_state & SS_ISCONNECTING) 167180025Sdfr && so->so_error == 0) { 168180025Sdfr error = msleep(&so->so_timeo, SOCK_MTX(so), 169221127Srmacklem sleep_flag, "connec", 0); 170180025Sdfr if (error) { 171180025Sdfr if (error == EINTR || error == ERESTART) 172180025Sdfr interrupted = 1; 173180025Sdfr break; 174180025Sdfr } 175180025Sdfr } 176180025Sdfr if (error == 0) { 177180025Sdfr error = so->so_error; 178180025Sdfr so->so_error = 0; 179180025Sdfr } 180180025Sdfr SOCK_UNLOCK(so); 181177633Sdfr if (error) { 182180025Sdfr if (!interrupted) 183180025Sdfr so->so_state &= ~SS_ISCONNECTING; 184177633Sdfr rpc_createerr.cf_stat = RPC_SYSTEMERROR; 185177633Sdfr rpc_createerr.cf_error.re_errno = error; 186177633Sdfr goto err; 187177633Sdfr } 188177633Sdfr } 189177633Sdfr 190196503Szec if (!__rpc_socket2sockinfo(so, &si)) { 191177633Sdfr goto err; 192196503Szec } 193177633Sdfr 194184588Sdfr if (so->so_proto->pr_flags & PR_CONNREQUIRED) { 195184588Sdfr bzero(&sopt, sizeof(sopt)); 196184588Sdfr sopt.sopt_dir = SOPT_SET; 197184588Sdfr sopt.sopt_level = SOL_SOCKET; 198184588Sdfr sopt.sopt_name = SO_KEEPALIVE; 199184588Sdfr sopt.sopt_val = &one; 200184588Sdfr sopt.sopt_valsize = sizeof(one); 201184588Sdfr sosetopt(so, &sopt); 202184588Sdfr } 203184588Sdfr 204184588Sdfr if (so->so_proto->pr_protocol == IPPROTO_TCP) { 205184588Sdfr bzero(&sopt, sizeof(sopt)); 206184588Sdfr sopt.sopt_dir = SOPT_SET; 207184588Sdfr sopt.sopt_level = IPPROTO_TCP; 208184588Sdfr sopt.sopt_name = TCP_NODELAY; 209184588Sdfr sopt.sopt_val = &one; 210184588Sdfr sopt.sopt_valsize = sizeof(one); 211184588Sdfr sosetopt(so, &sopt); 212184588Sdfr } 213184588Sdfr 214177633Sdfr ct->ct_closeit = FALSE; 215177633Sdfr 216177633Sdfr /* 217177633Sdfr * Set up private data struct 218177633Sdfr */ 219177633Sdfr ct->ct_socket = so; 220177633Sdfr ct->ct_wait.tv_sec = -1; 221177633Sdfr ct->ct_wait.tv_usec = -1; 222177633Sdfr memcpy(&ct->ct_addr, raddr, raddr->sa_len); 223177633Sdfr 224177633Sdfr /* 225177633Sdfr * Initialize call message 226177633Sdfr */ 227177633Sdfr getmicrotime(&now); 228177633Sdfr ct->ct_xid = ((uint32_t)++disrupt) ^ __RPC_GETXID(&now); 229177633Sdfr call_msg.rm_xid = ct->ct_xid; 230177633Sdfr call_msg.rm_direction = CALL; 231177633Sdfr call_msg.rm_call.cb_rpcvers = RPC_MSG_VERSION; 232177633Sdfr call_msg.rm_call.cb_prog = (uint32_t)prog; 233177633Sdfr call_msg.rm_call.cb_vers = (uint32_t)vers; 234177633Sdfr 235177633Sdfr /* 236177633Sdfr * pre-serialize the static part of the call msg and stash it away 237177633Sdfr */ 238177633Sdfr xdrmem_create(&xdrs, ct->ct_mcallc, MCALL_MSG_SIZE, 239177633Sdfr XDR_ENCODE); 240177633Sdfr if (! xdr_callhdr(&xdrs, &call_msg)) { 241177633Sdfr if (ct->ct_closeit) { 242177633Sdfr soclose(ct->ct_socket); 243177633Sdfr } 244177633Sdfr goto err; 245177633Sdfr } 246177633Sdfr ct->ct_mpos = XDR_GETPOS(&xdrs); 247177633Sdfr XDR_DESTROY(&xdrs); 248177633Sdfr ct->ct_waitchan = "rpcrecv"; 249177633Sdfr ct->ct_waitflag = 0; 250177633Sdfr 251177633Sdfr /* 252177633Sdfr * Create a client handle which uses xdrrec for serialization 253177633Sdfr * and authnone for authentication. 254177633Sdfr */ 255213756Srmacklem sendsz = __rpc_get_t_size(si.si_af, si.si_proto, (int)sendsz); 256213756Srmacklem recvsz = __rpc_get_t_size(si.si_af, si.si_proto, (int)recvsz); 257213756Srmacklem error = soreserve(ct->ct_socket, sendsz, recvsz); 258213756Srmacklem if (error != 0) { 259213756Srmacklem if (ct->ct_closeit) { 260213756Srmacklem soclose(ct->ct_socket); 261213756Srmacklem } 262213756Srmacklem goto err; 263213756Srmacklem } 264180025Sdfr cl->cl_refs = 1; 265177633Sdfr cl->cl_ops = &clnt_vc_ops; 266177633Sdfr cl->cl_private = ct; 267177633Sdfr cl->cl_auth = authnone_create(); 268177633Sdfr 269177633Sdfr SOCKBUF_LOCK(&ct->ct_socket->so_rcv); 270193272Sjhb soupcall_set(ct->ct_socket, SO_RCV, clnt_vc_soupcall, ct); 271177633Sdfr SOCKBUF_UNLOCK(&ct->ct_socket->so_rcv); 272177633Sdfr 273177633Sdfr ct->ct_record = NULL; 274177633Sdfr ct->ct_record_resid = 0; 275177633Sdfr TAILQ_INIT(&ct->ct_pending); 276177633Sdfr return (cl); 277177633Sdfr 278177633Sdfrerr: 279177633Sdfr if (cl) { 280177633Sdfr if (ct) { 281184877Sdfr mtx_destroy(&ct->ct_lock); 282177633Sdfr mem_free(ct, sizeof (struct ct_data)); 283177633Sdfr } 284177633Sdfr if (cl) 285177633Sdfr mem_free(cl, sizeof (CLIENT)); 286177633Sdfr } 287177633Sdfr return ((CLIENT *)NULL); 288177633Sdfr} 289177633Sdfr 290177633Sdfrstatic enum clnt_stat 291177633Sdfrclnt_vc_call( 292184588Sdfr CLIENT *cl, /* client handle */ 293184588Sdfr struct rpc_callextra *ext, /* call metadata */ 294184588Sdfr rpcproc_t proc, /* procedure number */ 295184588Sdfr struct mbuf *args, /* pointer to args */ 296184588Sdfr struct mbuf **resultsp, /* pointer to results */ 297184588Sdfr struct timeval utimeout) 298177633Sdfr{ 299177633Sdfr struct ct_data *ct = (struct ct_data *) cl->cl_private; 300180025Sdfr AUTH *auth; 301184588Sdfr struct rpc_err *errp; 302184588Sdfr enum clnt_stat stat; 303177633Sdfr XDR xdrs; 304177633Sdfr struct rpc_msg reply_msg; 305177633Sdfr bool_t ok; 306177633Sdfr int nrefreshes = 2; /* number of times to refresh cred */ 307177633Sdfr struct timeval timeout; 308177633Sdfr uint32_t xid; 309184588Sdfr struct mbuf *mreq = NULL, *results; 310180025Sdfr struct ct_request *cr; 311177633Sdfr int error; 312177633Sdfr 313180025Sdfr cr = malloc(sizeof(struct ct_request), M_RPC, M_WAITOK); 314180025Sdfr 315177633Sdfr mtx_lock(&ct->ct_lock); 316177633Sdfr 317184588Sdfr if (ct->ct_closing || ct->ct_closed) { 318180025Sdfr mtx_unlock(&ct->ct_lock); 319180025Sdfr free(cr, M_RPC); 320180025Sdfr return (RPC_CANTSEND); 321180025Sdfr } 322180025Sdfr ct->ct_threads++; 323177633Sdfr 324184588Sdfr if (ext) { 325180025Sdfr auth = ext->rc_auth; 326184588Sdfr errp = &ext->rc_err; 327184588Sdfr } else { 328180025Sdfr auth = cl->cl_auth; 329184588Sdfr errp = &ct->ct_error; 330184588Sdfr } 331180025Sdfr 332180025Sdfr cr->cr_mrep = NULL; 333180025Sdfr cr->cr_error = 0; 334180025Sdfr 335177633Sdfr if (ct->ct_wait.tv_usec == -1) { 336177633Sdfr timeout = utimeout; /* use supplied timeout */ 337177633Sdfr } else { 338177633Sdfr timeout = ct->ct_wait; /* use default timeout */ 339177633Sdfr } 340177633Sdfr 341177633Sdfrcall_again: 342177633Sdfr mtx_assert(&ct->ct_lock, MA_OWNED); 343177633Sdfr 344177633Sdfr ct->ct_xid++; 345177633Sdfr xid = ct->ct_xid; 346177633Sdfr 347177633Sdfr mtx_unlock(&ct->ct_lock); 348177633Sdfr 349177633Sdfr /* 350177633Sdfr * Leave space to pre-pend the record mark. 351177633Sdfr */ 352248195Sglebius mreq = m_gethdr(M_WAITOK, MT_DATA); 353177633Sdfr mreq->m_data += sizeof(uint32_t); 354184588Sdfr KASSERT(ct->ct_mpos + sizeof(uint32_t) <= MHLEN, 355184588Sdfr ("RPC header too big")); 356184588Sdfr bcopy(ct->ct_mcallc, mreq->m_data, ct->ct_mpos); 357184588Sdfr mreq->m_len = ct->ct_mpos; 358177633Sdfr 359177633Sdfr /* 360177633Sdfr * The XID is the first thing in the request. 361177633Sdfr */ 362177633Sdfr *mtod(mreq, uint32_t *) = htonl(xid); 363177633Sdfr 364177633Sdfr xdrmbuf_create(&xdrs, mreq, XDR_ENCODE); 365177633Sdfr 366184588Sdfr errp->re_status = stat = RPC_SUCCESS; 367177633Sdfr 368177633Sdfr if ((! XDR_PUTINT32(&xdrs, &proc)) || 369184588Sdfr (! AUTH_MARSHALL(auth, xid, &xdrs, 370184588Sdfr m_copym(args, 0, M_COPYALL, M_WAITOK)))) { 371184588Sdfr errp->re_status = stat = RPC_CANTENCODEARGS; 372180025Sdfr mtx_lock(&ct->ct_lock); 373180025Sdfr goto out; 374177633Sdfr } 375184588Sdfr mreq->m_pkthdr.len = m_length(mreq, NULL); 376177633Sdfr 377177633Sdfr /* 378177633Sdfr * Prepend a record marker containing the packet length. 379177633Sdfr */ 380243882Sglebius M_PREPEND(mreq, sizeof(uint32_t), M_WAITOK); 381177633Sdfr *mtod(mreq, uint32_t *) = 382177633Sdfr htonl(0x80000000 | (mreq->m_pkthdr.len - sizeof(uint32_t))); 383177633Sdfr 384180025Sdfr cr->cr_xid = xid; 385177633Sdfr mtx_lock(&ct->ct_lock); 386199053Srmacklem /* 387199053Srmacklem * Check to see if the other end has already started to close down 388199053Srmacklem * the connection. The upcall will have set ct_error.re_status 389199053Srmacklem * to RPC_CANTRECV if this is the case. 390199053Srmacklem * If the other end starts to close down the connection after this 391199053Srmacklem * point, it will be detected later when cr_error is checked, 392199053Srmacklem * since the request is in the ct_pending queue. 393199053Srmacklem */ 394199053Srmacklem if (ct->ct_error.re_status == RPC_CANTRECV) { 395199053Srmacklem if (errp != &ct->ct_error) { 396199053Srmacklem errp->re_errno = ct->ct_error.re_errno; 397199053Srmacklem errp->re_status = RPC_CANTRECV; 398199053Srmacklem } 399199053Srmacklem stat = RPC_CANTRECV; 400199053Srmacklem goto out; 401199053Srmacklem } 402180025Sdfr TAILQ_INSERT_TAIL(&ct->ct_pending, cr, cr_link); 403177633Sdfr mtx_unlock(&ct->ct_lock); 404177633Sdfr 405177633Sdfr /* 406177633Sdfr * sosend consumes mreq. 407177633Sdfr */ 408177633Sdfr error = sosend(ct->ct_socket, NULL, NULL, mreq, NULL, 0, curthread); 409177633Sdfr mreq = NULL; 410184588Sdfr if (error == EMSGSIZE) { 411184588Sdfr SOCKBUF_LOCK(&ct->ct_socket->so_snd); 412184588Sdfr sbwait(&ct->ct_socket->so_snd); 413184588Sdfr SOCKBUF_UNLOCK(&ct->ct_socket->so_snd); 414184588Sdfr AUTH_VALIDATE(auth, xid, NULL, NULL); 415184588Sdfr mtx_lock(&ct->ct_lock); 416184588Sdfr TAILQ_REMOVE(&ct->ct_pending, cr, cr_link); 417184588Sdfr goto call_again; 418184588Sdfr } 419177633Sdfr 420184588Sdfr reply_msg.acpted_rply.ar_verf.oa_flavor = AUTH_NULL; 421184588Sdfr reply_msg.acpted_rply.ar_verf.oa_base = cr->cr_verf; 422184588Sdfr reply_msg.acpted_rply.ar_verf.oa_length = 0; 423184588Sdfr reply_msg.acpted_rply.ar_results.where = NULL; 424184588Sdfr reply_msg.acpted_rply.ar_results.proc = (xdrproc_t)xdr_void; 425177633Sdfr 426177633Sdfr mtx_lock(&ct->ct_lock); 427177633Sdfr if (error) { 428180025Sdfr TAILQ_REMOVE(&ct->ct_pending, cr, cr_link); 429184588Sdfr errp->re_errno = error; 430184588Sdfr errp->re_status = stat = RPC_CANTSEND; 431177633Sdfr goto out; 432177633Sdfr } 433177633Sdfr 434177633Sdfr /* 435177633Sdfr * Check to see if we got an upcall while waiting for the 436177633Sdfr * lock. In both these cases, the request has been removed 437177633Sdfr * from ct->ct_pending. 438177633Sdfr */ 439180025Sdfr if (cr->cr_error) { 440180025Sdfr TAILQ_REMOVE(&ct->ct_pending, cr, cr_link); 441184588Sdfr errp->re_errno = cr->cr_error; 442184588Sdfr errp->re_status = stat = RPC_CANTRECV; 443177633Sdfr goto out; 444177633Sdfr } 445180025Sdfr if (cr->cr_mrep) { 446180025Sdfr TAILQ_REMOVE(&ct->ct_pending, cr, cr_link); 447177633Sdfr goto got_reply; 448177633Sdfr } 449177633Sdfr 450177633Sdfr /* 451177633Sdfr * Hack to provide rpc-based message passing 452177633Sdfr */ 453177633Sdfr if (timeout.tv_sec == 0 && timeout.tv_usec == 0) { 454180025Sdfr TAILQ_REMOVE(&ct->ct_pending, cr, cr_link); 455184588Sdfr errp->re_status = stat = RPC_TIMEDOUT; 456177633Sdfr goto out; 457177633Sdfr } 458177633Sdfr 459180025Sdfr error = msleep(cr, &ct->ct_lock, ct->ct_waitflag, ct->ct_waitchan, 460177633Sdfr tvtohz(&timeout)); 461177633Sdfr 462180025Sdfr TAILQ_REMOVE(&ct->ct_pending, cr, cr_link); 463180025Sdfr 464177633Sdfr if (error) { 465177633Sdfr /* 466177633Sdfr * The sleep returned an error so our request is still 467177633Sdfr * on the list. Turn the error code into an 468177633Sdfr * appropriate client status. 469177633Sdfr */ 470184588Sdfr errp->re_errno = error; 471177633Sdfr switch (error) { 472177633Sdfr case EINTR: 473184588Sdfr stat = RPC_INTR; 474177633Sdfr break; 475177633Sdfr case EWOULDBLOCK: 476184588Sdfr stat = RPC_TIMEDOUT; 477177633Sdfr break; 478177633Sdfr default: 479184588Sdfr stat = RPC_CANTRECV; 480177633Sdfr } 481184588Sdfr errp->re_status = stat; 482177633Sdfr goto out; 483177633Sdfr } else { 484177633Sdfr /* 485177633Sdfr * We were woken up by the upcall. If the 486177633Sdfr * upcall had a receive error, report that, 487177633Sdfr * otherwise we have a reply. 488177633Sdfr */ 489180025Sdfr if (cr->cr_error) { 490184588Sdfr errp->re_errno = cr->cr_error; 491184588Sdfr errp->re_status = stat = RPC_CANTRECV; 492177633Sdfr goto out; 493177633Sdfr } 494177633Sdfr } 495177633Sdfr 496177633Sdfrgot_reply: 497177633Sdfr /* 498177633Sdfr * Now decode and validate the response. We need to drop the 499177633Sdfr * lock since xdr_replymsg may end up sleeping in malloc. 500177633Sdfr */ 501177633Sdfr mtx_unlock(&ct->ct_lock); 502177633Sdfr 503184588Sdfr if (ext && ext->rc_feedback) 504184588Sdfr ext->rc_feedback(FEEDBACK_OK, proc, ext->rc_feedback_arg); 505184588Sdfr 506180025Sdfr xdrmbuf_create(&xdrs, cr->cr_mrep, XDR_DECODE); 507177633Sdfr ok = xdr_replymsg(&xdrs, &reply_msg); 508180025Sdfr cr->cr_mrep = NULL; 509177633Sdfr 510177633Sdfr if (ok) { 511177633Sdfr if ((reply_msg.rm_reply.rp_stat == MSG_ACCEPTED) && 512184588Sdfr (reply_msg.acpted_rply.ar_stat == SUCCESS)) 513184588Sdfr errp->re_status = stat = RPC_SUCCESS; 514177633Sdfr else 515184588Sdfr stat = _seterr_reply(&reply_msg, errp); 516177633Sdfr 517184588Sdfr if (stat == RPC_SUCCESS) { 518184588Sdfr results = xdrmbuf_getall(&xdrs); 519184588Sdfr if (!AUTH_VALIDATE(auth, xid, 520184588Sdfr &reply_msg.acpted_rply.ar_verf, 521184588Sdfr &results)) { 522184588Sdfr errp->re_status = stat = RPC_AUTHERROR; 523184588Sdfr errp->re_why = AUTH_INVALIDRESP; 524184588Sdfr } else { 525184588Sdfr KASSERT(results, 526184588Sdfr ("auth validated but no result")); 527184588Sdfr *resultsp = results; 528177633Sdfr } 529177633Sdfr } /* end successful completion */ 530177633Sdfr /* 531177633Sdfr * If unsuccesful AND error is an authentication error 532177633Sdfr * then refresh credentials and try again, else break 533177633Sdfr */ 534184588Sdfr else if (stat == RPC_AUTHERROR) 535177633Sdfr /* maybe our credentials need to be refreshed ... */ 536177633Sdfr if (nrefreshes > 0 && 537184588Sdfr AUTH_REFRESH(auth, &reply_msg)) { 538177633Sdfr nrefreshes--; 539184588Sdfr XDR_DESTROY(&xdrs); 540184588Sdfr mtx_lock(&ct->ct_lock); 541177633Sdfr goto call_again; 542177633Sdfr } 543177633Sdfr /* end of unsuccessful completion */ 544177633Sdfr } /* end of valid reply message */ 545177633Sdfr else { 546184588Sdfr errp->re_status = stat = RPC_CANTDECODERES; 547177633Sdfr } 548184588Sdfr XDR_DESTROY(&xdrs); 549184588Sdfr mtx_lock(&ct->ct_lock); 550177633Sdfrout: 551177633Sdfr mtx_assert(&ct->ct_lock, MA_OWNED); 552177633Sdfr 553184588Sdfr KASSERT(stat != RPC_SUCCESS || *resultsp, 554184588Sdfr ("RPC_SUCCESS without reply")); 555184588Sdfr 556177633Sdfr if (mreq) 557177633Sdfr m_freem(mreq); 558180025Sdfr if (cr->cr_mrep) 559180025Sdfr m_freem(cr->cr_mrep); 560177633Sdfr 561180025Sdfr ct->ct_threads--; 562180025Sdfr if (ct->ct_closing) 563180025Sdfr wakeup(ct); 564180025Sdfr 565177633Sdfr mtx_unlock(&ct->ct_lock); 566180025Sdfr 567184588Sdfr if (auth && stat != RPC_SUCCESS) 568184588Sdfr AUTH_VALIDATE(auth, xid, NULL, NULL); 569184588Sdfr 570180025Sdfr free(cr, M_RPC); 571180025Sdfr 572184588Sdfr return (stat); 573177633Sdfr} 574177633Sdfr 575177633Sdfrstatic void 576177633Sdfrclnt_vc_geterr(CLIENT *cl, struct rpc_err *errp) 577177633Sdfr{ 578177633Sdfr struct ct_data *ct = (struct ct_data *) cl->cl_private; 579177633Sdfr 580177633Sdfr *errp = ct->ct_error; 581177633Sdfr} 582177633Sdfr 583177633Sdfrstatic bool_t 584177633Sdfrclnt_vc_freeres(CLIENT *cl, xdrproc_t xdr_res, void *res_ptr) 585177633Sdfr{ 586177633Sdfr XDR xdrs; 587177633Sdfr bool_t dummy; 588177633Sdfr 589177633Sdfr xdrs.x_op = XDR_FREE; 590177633Sdfr dummy = (*xdr_res)(&xdrs, res_ptr); 591177633Sdfr 592177633Sdfr return (dummy); 593177633Sdfr} 594177633Sdfr 595177633Sdfr/*ARGSUSED*/ 596177633Sdfrstatic void 597177633Sdfrclnt_vc_abort(CLIENT *cl) 598177633Sdfr{ 599177633Sdfr} 600177633Sdfr 601177633Sdfrstatic bool_t 602177633Sdfrclnt_vc_control(CLIENT *cl, u_int request, void *info) 603177633Sdfr{ 604177633Sdfr struct ct_data *ct = (struct ct_data *)cl->cl_private; 605177633Sdfr void *infop = info; 606244008Srmacklem SVCXPRT *xprt; 607177633Sdfr 608177633Sdfr mtx_lock(&ct->ct_lock); 609177633Sdfr 610177633Sdfr switch (request) { 611177633Sdfr case CLSET_FD_CLOSE: 612177633Sdfr ct->ct_closeit = TRUE; 613177633Sdfr mtx_unlock(&ct->ct_lock); 614177633Sdfr return (TRUE); 615177633Sdfr case CLSET_FD_NCLOSE: 616177633Sdfr ct->ct_closeit = FALSE; 617177633Sdfr mtx_unlock(&ct->ct_lock); 618177633Sdfr return (TRUE); 619177633Sdfr default: 620177633Sdfr break; 621177633Sdfr } 622177633Sdfr 623177633Sdfr /* for other requests which use info */ 624177633Sdfr if (info == NULL) { 625177633Sdfr mtx_unlock(&ct->ct_lock); 626177633Sdfr return (FALSE); 627177633Sdfr } 628177633Sdfr switch (request) { 629177633Sdfr case CLSET_TIMEOUT: 630177633Sdfr if (time_not_ok((struct timeval *)info)) { 631177633Sdfr mtx_unlock(&ct->ct_lock); 632177633Sdfr return (FALSE); 633177633Sdfr } 634177633Sdfr ct->ct_wait = *(struct timeval *)infop; 635177633Sdfr break; 636177633Sdfr case CLGET_TIMEOUT: 637177633Sdfr *(struct timeval *)infop = ct->ct_wait; 638177633Sdfr break; 639177633Sdfr case CLGET_SERVER_ADDR: 640177633Sdfr (void) memcpy(info, &ct->ct_addr, (size_t)ct->ct_addr.ss_len); 641177633Sdfr break; 642177633Sdfr case CLGET_SVC_ADDR: 643177633Sdfr /* 644177633Sdfr * Slightly different semantics to userland - we use 645177633Sdfr * sockaddr instead of netbuf. 646177633Sdfr */ 647177633Sdfr memcpy(info, &ct->ct_addr, ct->ct_addr.ss_len); 648177633Sdfr break; 649177633Sdfr case CLSET_SVC_ADDR: /* set to new address */ 650177633Sdfr mtx_unlock(&ct->ct_lock); 651177633Sdfr return (FALSE); 652177633Sdfr case CLGET_XID: 653177633Sdfr *(uint32_t *)info = ct->ct_xid; 654177633Sdfr break; 655177633Sdfr case CLSET_XID: 656177633Sdfr /* This will set the xid of the NEXT call */ 657177633Sdfr /* decrement by 1 as clnt_vc_call() increments once */ 658177633Sdfr ct->ct_xid = *(uint32_t *)info - 1; 659177633Sdfr break; 660177633Sdfr case CLGET_VERS: 661177633Sdfr /* 662177633Sdfr * This RELIES on the information that, in the call body, 663177633Sdfr * the version number field is the fifth field from the 664177633Sdfr * begining of the RPC header. MUST be changed if the 665177633Sdfr * call_struct is changed 666177633Sdfr */ 667177633Sdfr *(uint32_t *)info = 668177633Sdfr ntohl(*(uint32_t *)(void *)(ct->ct_mcallc + 669177633Sdfr 4 * BYTES_PER_XDR_UNIT)); 670177633Sdfr break; 671177633Sdfr 672177633Sdfr case CLSET_VERS: 673177633Sdfr *(uint32_t *)(void *)(ct->ct_mcallc + 674177633Sdfr 4 * BYTES_PER_XDR_UNIT) = 675177633Sdfr htonl(*(uint32_t *)info); 676177633Sdfr break; 677177633Sdfr 678177633Sdfr case CLGET_PROG: 679177633Sdfr /* 680177633Sdfr * This RELIES on the information that, in the call body, 681177633Sdfr * the program number field is the fourth field from the 682177633Sdfr * begining of the RPC header. MUST be changed if the 683177633Sdfr * call_struct is changed 684177633Sdfr */ 685177633Sdfr *(uint32_t *)info = 686177633Sdfr ntohl(*(uint32_t *)(void *)(ct->ct_mcallc + 687177633Sdfr 3 * BYTES_PER_XDR_UNIT)); 688177633Sdfr break; 689177633Sdfr 690177633Sdfr case CLSET_PROG: 691177633Sdfr *(uint32_t *)(void *)(ct->ct_mcallc + 692177633Sdfr 3 * BYTES_PER_XDR_UNIT) = 693177633Sdfr htonl(*(uint32_t *)info); 694177633Sdfr break; 695177633Sdfr 696177633Sdfr case CLSET_WAITCHAN: 697184588Sdfr ct->ct_waitchan = (const char *)info; 698177633Sdfr break; 699177633Sdfr 700177633Sdfr case CLGET_WAITCHAN: 701177633Sdfr *(const char **) info = ct->ct_waitchan; 702177633Sdfr break; 703177633Sdfr 704177633Sdfr case CLSET_INTERRUPTIBLE: 705177633Sdfr if (*(int *) info) 706248255Sjhb ct->ct_waitflag = PCATCH; 707177633Sdfr else 708177633Sdfr ct->ct_waitflag = 0; 709177633Sdfr break; 710177633Sdfr 711177633Sdfr case CLGET_INTERRUPTIBLE: 712177633Sdfr if (ct->ct_waitflag) 713177633Sdfr *(int *) info = TRUE; 714177633Sdfr else 715177633Sdfr *(int *) info = FALSE; 716177633Sdfr break; 717177633Sdfr 718244008Srmacklem case CLSET_BACKCHANNEL: 719244008Srmacklem xprt = (SVCXPRT *)info; 720244008Srmacklem if (ct->ct_backchannelxprt == NULL) { 721244008Srmacklem xprt->xp_p2 = ct; 722244008Srmacklem ct->ct_backchannelxprt = xprt; 723244008Srmacklem } 724244008Srmacklem break; 725244008Srmacklem 726177633Sdfr default: 727177633Sdfr mtx_unlock(&ct->ct_lock); 728177633Sdfr return (FALSE); 729177633Sdfr } 730177633Sdfr 731177633Sdfr mtx_unlock(&ct->ct_lock); 732177633Sdfr return (TRUE); 733177633Sdfr} 734177633Sdfr 735177633Sdfrstatic void 736184588Sdfrclnt_vc_close(CLIENT *cl) 737177633Sdfr{ 738177633Sdfr struct ct_data *ct = (struct ct_data *) cl->cl_private; 739180025Sdfr struct ct_request *cr; 740177633Sdfr 741177633Sdfr mtx_lock(&ct->ct_lock); 742177633Sdfr 743184588Sdfr if (ct->ct_closed) { 744184588Sdfr mtx_unlock(&ct->ct_lock); 745184588Sdfr return; 746184588Sdfr } 747184588Sdfr 748184588Sdfr if (ct->ct_closing) { 749184588Sdfr while (ct->ct_closing) 750184588Sdfr msleep(ct, &ct->ct_lock, 0, "rpcclose", 0); 751184588Sdfr KASSERT(ct->ct_closed, ("client should be closed")); 752184588Sdfr mtx_unlock(&ct->ct_lock); 753184588Sdfr return; 754184588Sdfr } 755184588Sdfr 756177633Sdfr if (ct->ct_socket) { 757193272Sjhb ct->ct_closing = TRUE; 758193272Sjhb mtx_unlock(&ct->ct_lock); 759193272Sjhb 760177633Sdfr SOCKBUF_LOCK(&ct->ct_socket->so_rcv); 761193272Sjhb soupcall_clear(ct->ct_socket, SO_RCV); 762193437Srmacklem clnt_vc_upcallsdone(ct); 763177633Sdfr SOCKBUF_UNLOCK(&ct->ct_socket->so_rcv); 764177633Sdfr 765180025Sdfr /* 766180025Sdfr * Abort any pending requests and wait until everyone 767180025Sdfr * has finished with clnt_vc_call. 768180025Sdfr */ 769193272Sjhb mtx_lock(&ct->ct_lock); 770180025Sdfr TAILQ_FOREACH(cr, &ct->ct_pending, cr_link) { 771180025Sdfr cr->cr_xid = 0; 772180025Sdfr cr->cr_error = ESHUTDOWN; 773180025Sdfr wakeup(cr); 774180025Sdfr } 775177633Sdfr 776180025Sdfr while (ct->ct_threads) 777180025Sdfr msleep(ct, &ct->ct_lock, 0, "rpcclose", 0); 778184588Sdfr } 779180025Sdfr 780184588Sdfr ct->ct_closing = FALSE; 781184588Sdfr ct->ct_closed = TRUE; 782184588Sdfr mtx_unlock(&ct->ct_lock); 783184588Sdfr wakeup(ct); 784184588Sdfr} 785184588Sdfr 786184588Sdfrstatic void 787184588Sdfrclnt_vc_destroy(CLIENT *cl) 788184588Sdfr{ 789184588Sdfr struct ct_data *ct = (struct ct_data *) cl->cl_private; 790184588Sdfr struct socket *so = NULL; 791244008Srmacklem SVCXPRT *xprt; 792184588Sdfr 793184588Sdfr clnt_vc_close(cl); 794184588Sdfr 795184588Sdfr mtx_lock(&ct->ct_lock); 796244008Srmacklem xprt = ct->ct_backchannelxprt; 797244008Srmacklem ct->ct_backchannelxprt = NULL; 798244008Srmacklem if (xprt != NULL) { 799244008Srmacklem mtx_unlock(&ct->ct_lock); /* To avoid a LOR. */ 800244008Srmacklem sx_xlock(&xprt->xp_lock); 801244008Srmacklem mtx_lock(&ct->ct_lock); 802244008Srmacklem xprt->xp_p2 = NULL; 803244008Srmacklem xprt_unregister(xprt); 804244008Srmacklem } 805184588Sdfr 806184588Sdfr if (ct->ct_socket) { 807177633Sdfr if (ct->ct_closeit) { 808177633Sdfr so = ct->ct_socket; 809177633Sdfr } 810177633Sdfr } 811177633Sdfr 812177633Sdfr mtx_unlock(&ct->ct_lock); 813244008Srmacklem if (xprt != NULL) { 814244008Srmacklem sx_xunlock(&xprt->xp_lock); 815244008Srmacklem SVC_RELEASE(xprt); 816244008Srmacklem } 817177633Sdfr 818177633Sdfr mtx_destroy(&ct->ct_lock); 819177633Sdfr if (so) { 820177633Sdfr soshutdown(so, SHUT_WR); 821177633Sdfr soclose(so); 822177633Sdfr } 823177633Sdfr mem_free(ct, sizeof(struct ct_data)); 824241143Spfg if (cl->cl_netid && cl->cl_netid[0]) 825241143Spfg mem_free(cl->cl_netid, strlen(cl->cl_netid) +1); 826241143Spfg if (cl->cl_tp && cl->cl_tp[0]) 827241143Spfg mem_free(cl->cl_tp, strlen(cl->cl_tp) +1); 828177633Sdfr mem_free(cl, sizeof(CLIENT)); 829177633Sdfr} 830177633Sdfr 831177633Sdfr/* 832177633Sdfr * Make sure that the time is not garbage. -1 value is disallowed. 833177633Sdfr * Note this is different from time_not_ok in clnt_dg.c 834177633Sdfr */ 835177633Sdfrstatic bool_t 836177633Sdfrtime_not_ok(struct timeval *t) 837177633Sdfr{ 838177633Sdfr return (t->tv_sec <= -1 || t->tv_sec > 100000000 || 839177633Sdfr t->tv_usec <= -1 || t->tv_usec > 1000000); 840177633Sdfr} 841177633Sdfr 842193272Sjhbint 843177633Sdfrclnt_vc_soupcall(struct socket *so, void *arg, int waitflag) 844177633Sdfr{ 845177633Sdfr struct ct_data *ct = (struct ct_data *) arg; 846177633Sdfr struct uio uio; 847244008Srmacklem struct mbuf *m, *m2; 848177633Sdfr struct ct_request *cr; 849177633Sdfr int error, rcvflag, foundreq; 850244008Srmacklem uint32_t xid_plus_direction[2], header; 851184588Sdfr bool_t do_read; 852244008Srmacklem SVCXPRT *xprt; 853244008Srmacklem struct cf_conn *cd; 854177633Sdfr 855244008Srmacklem CTASSERT(sizeof(xid_plus_direction) == 2 * sizeof(uint32_t)); 856193437Srmacklem ct->ct_upcallrefs++; 857177633Sdfr uio.uio_td = curthread; 858177633Sdfr do { 859177633Sdfr /* 860177633Sdfr * If ct_record_resid is zero, we are waiting for a 861177633Sdfr * record mark. 862177633Sdfr */ 863177633Sdfr if (ct->ct_record_resid == 0) { 864177633Sdfr 865177633Sdfr /* 866177633Sdfr * Make sure there is either a whole record 867177633Sdfr * mark in the buffer or there is some other 868177633Sdfr * error condition 869177633Sdfr */ 870177633Sdfr do_read = FALSE; 871177633Sdfr if (so->so_rcv.sb_cc >= sizeof(uint32_t) 872177633Sdfr || (so->so_rcv.sb_state & SBS_CANTRCVMORE) 873177633Sdfr || so->so_error) 874177633Sdfr do_read = TRUE; 875177633Sdfr 876177633Sdfr if (!do_read) 877193437Srmacklem break; 878177633Sdfr 879193272Sjhb SOCKBUF_UNLOCK(&so->so_rcv); 880177633Sdfr uio.uio_resid = sizeof(uint32_t); 881177633Sdfr m = NULL; 882177633Sdfr rcvflag = MSG_DONTWAIT | MSG_SOCALLBCK; 883177633Sdfr error = soreceive(so, NULL, &uio, &m, NULL, &rcvflag); 884193272Sjhb SOCKBUF_LOCK(&so->so_rcv); 885177633Sdfr 886177633Sdfr if (error == EWOULDBLOCK) 887177633Sdfr break; 888177633Sdfr 889177633Sdfr /* 890177633Sdfr * If there was an error, wake up all pending 891177633Sdfr * requests. 892177633Sdfr */ 893177633Sdfr if (error || uio.uio_resid > 0) { 894177633Sdfr wakeup_all: 895177633Sdfr mtx_lock(&ct->ct_lock); 896177633Sdfr if (!error) { 897177633Sdfr /* 898177633Sdfr * We must have got EOF trying 899177633Sdfr * to read from the stream. 900177633Sdfr */ 901177633Sdfr error = ECONNRESET; 902177633Sdfr } 903177633Sdfr ct->ct_error.re_status = RPC_CANTRECV; 904177633Sdfr ct->ct_error.re_errno = error; 905177633Sdfr TAILQ_FOREACH(cr, &ct->ct_pending, cr_link) { 906177633Sdfr cr->cr_error = error; 907177633Sdfr wakeup(cr); 908177633Sdfr } 909177633Sdfr mtx_unlock(&ct->ct_lock); 910177633Sdfr break; 911177633Sdfr } 912217242Srmacklem m_copydata(m, 0, sizeof(uint32_t), (char *)&header); 913177633Sdfr header = ntohl(header); 914177633Sdfr ct->ct_record = NULL; 915177633Sdfr ct->ct_record_resid = header & 0x7fffffff; 916177633Sdfr ct->ct_record_eor = ((header & 0x80000000) != 0); 917177633Sdfr m_freem(m); 918177633Sdfr } else { 919177633Sdfr /* 920184588Sdfr * Wait until the socket has the whole record 921184588Sdfr * buffered. 922184588Sdfr */ 923184588Sdfr do_read = FALSE; 924184588Sdfr if (so->so_rcv.sb_cc >= ct->ct_record_resid 925184588Sdfr || (so->so_rcv.sb_state & SBS_CANTRCVMORE) 926184588Sdfr || so->so_error) 927184588Sdfr do_read = TRUE; 928184588Sdfr 929184588Sdfr if (!do_read) 930193437Srmacklem break; 931184588Sdfr 932184588Sdfr /* 933177633Sdfr * We have the record mark. Read as much as 934177633Sdfr * the socket has buffered up to the end of 935177633Sdfr * this record. 936177633Sdfr */ 937193272Sjhb SOCKBUF_UNLOCK(&so->so_rcv); 938177633Sdfr uio.uio_resid = ct->ct_record_resid; 939177633Sdfr m = NULL; 940177633Sdfr rcvflag = MSG_DONTWAIT | MSG_SOCALLBCK; 941177633Sdfr error = soreceive(so, NULL, &uio, &m, NULL, &rcvflag); 942193272Sjhb SOCKBUF_LOCK(&so->so_rcv); 943177633Sdfr 944177633Sdfr if (error == EWOULDBLOCK) 945177633Sdfr break; 946177633Sdfr 947177633Sdfr if (error || uio.uio_resid == ct->ct_record_resid) 948177633Sdfr goto wakeup_all; 949177633Sdfr 950177633Sdfr /* 951177633Sdfr * If we have part of the record already, 952177633Sdfr * chain this bit onto the end. 953177633Sdfr */ 954177633Sdfr if (ct->ct_record) 955177633Sdfr m_last(ct->ct_record)->m_next = m; 956177633Sdfr else 957177633Sdfr ct->ct_record = m; 958177633Sdfr 959177633Sdfr ct->ct_record_resid = uio.uio_resid; 960177633Sdfr 961177633Sdfr /* 962177633Sdfr * If we have the entire record, see if we can 963177633Sdfr * match it to a request. 964177633Sdfr */ 965177633Sdfr if (ct->ct_record_resid == 0 966177633Sdfr && ct->ct_record_eor) { 967177633Sdfr /* 968177633Sdfr * The XID is in the first uint32_t of 969244008Srmacklem * the reply and the message direction 970244008Srmacklem * is the second one. 971177633Sdfr */ 972244008Srmacklem if (ct->ct_record->m_len < 973244008Srmacklem sizeof(xid_plus_direction) && 974220585Srmacklem m_length(ct->ct_record, NULL) < 975244008Srmacklem sizeof(xid_plus_direction)) { 976220585Srmacklem m_freem(ct->ct_record); 977177633Sdfr break; 978220585Srmacklem } 979244008Srmacklem m_copydata(ct->ct_record, 0, 980244008Srmacklem sizeof(xid_plus_direction), 981244008Srmacklem (char *)xid_plus_direction); 982244008Srmacklem xid_plus_direction[0] = 983244008Srmacklem ntohl(xid_plus_direction[0]); 984244008Srmacklem xid_plus_direction[1] = 985244008Srmacklem ntohl(xid_plus_direction[1]); 986244008Srmacklem /* Check message direction. */ 987244008Srmacklem if (xid_plus_direction[1] == CALL) { 988244008Srmacklem /* This is a backchannel request. */ 989244008Srmacklem mtx_lock(&ct->ct_lock); 990244008Srmacklem xprt = ct->ct_backchannelxprt; 991244008Srmacklem if (xprt == NULL) { 992244008Srmacklem mtx_unlock(&ct->ct_lock); 993244008Srmacklem /* Just throw it away. */ 994244008Srmacklem m_freem(ct->ct_record); 995244008Srmacklem ct->ct_record = NULL; 996244008Srmacklem } else { 997244008Srmacklem cd = (struct cf_conn *) 998244008Srmacklem xprt->xp_p1; 999244008Srmacklem m2 = cd->mreq; 1000177633Sdfr /* 1001244008Srmacklem * The requests are chained 1002244008Srmacklem * in the m_nextpkt list. 1003177633Sdfr */ 1004244008Srmacklem while (m2 != NULL && 1005244008Srmacklem m2->m_nextpkt != NULL) 1006244008Srmacklem /* Find end of list. */ 1007244008Srmacklem m2 = m2->m_nextpkt; 1008244008Srmacklem if (m2 != NULL) 1009244008Srmacklem m2->m_nextpkt = 1010244008Srmacklem ct->ct_record; 1011244008Srmacklem else 1012244008Srmacklem cd->mreq = 1013244008Srmacklem ct->ct_record; 1014244008Srmacklem ct->ct_record->m_nextpkt = 1015244008Srmacklem NULL; 1016244008Srmacklem ct->ct_record = NULL; 1017244008Srmacklem xprt_active(xprt); 1018244008Srmacklem mtx_unlock(&ct->ct_lock); 1019177633Sdfr } 1020244008Srmacklem } else { 1021244008Srmacklem mtx_lock(&ct->ct_lock); 1022244008Srmacklem foundreq = 0; 1023244008Srmacklem TAILQ_FOREACH(cr, &ct->ct_pending, 1024244008Srmacklem cr_link) { 1025244008Srmacklem if (cr->cr_xid == 1026244008Srmacklem xid_plus_direction[0]) { 1027244008Srmacklem /* 1028244008Srmacklem * This one 1029244008Srmacklem * matches. We leave 1030244008Srmacklem * the reply mbuf in 1031244008Srmacklem * cr->cr_mrep. Set 1032244008Srmacklem * the XID to zero so 1033244008Srmacklem * that we will ignore 1034244008Srmacklem * any duplicated 1035244008Srmacklem * replies. 1036244008Srmacklem */ 1037244008Srmacklem cr->cr_xid = 0; 1038244008Srmacklem cr->cr_mrep = 1039244008Srmacklem ct->ct_record; 1040244008Srmacklem cr->cr_error = 0; 1041244008Srmacklem foundreq = 1; 1042244008Srmacklem wakeup(cr); 1043244008Srmacklem break; 1044244008Srmacklem } 1045244008Srmacklem } 1046244008Srmacklem mtx_unlock(&ct->ct_lock); 1047244008Srmacklem 1048244008Srmacklem if (!foundreq) 1049244008Srmacklem m_freem(ct->ct_record); 1050244008Srmacklem ct->ct_record = NULL; 1051177633Sdfr } 1052177633Sdfr } 1053177633Sdfr } 1054177633Sdfr } while (m); 1055193437Srmacklem ct->ct_upcallrefs--; 1056193437Srmacklem if (ct->ct_upcallrefs < 0) 1057193437Srmacklem panic("rpcvc upcall refcnt"); 1058193437Srmacklem if (ct->ct_upcallrefs == 0) 1059193437Srmacklem wakeup(&ct->ct_upcallrefs); 1060193272Sjhb return (SU_OK); 1061177633Sdfr} 1062193437Srmacklem 1063193437Srmacklem/* 1064193437Srmacklem * Wait for all upcalls in progress to complete. 1065193437Srmacklem */ 1066193437Srmacklemstatic void 1067193437Srmacklemclnt_vc_upcallsdone(struct ct_data *ct) 1068193437Srmacklem{ 1069193437Srmacklem 1070193437Srmacklem SOCKBUF_LOCK_ASSERT(&ct->ct_socket->so_rcv); 1071193437Srmacklem 1072193437Srmacklem while (ct->ct_upcallrefs > 0) 1073193437Srmacklem (void) msleep(&ct->ct_upcallrefs, 1074193437Srmacklem SOCKBUF_MTX(&ct->ct_socket->so_rcv), 0, "rpcvcup", 0); 1075193437Srmacklem} 1076