clnt_vc.c revision 193437
1/* $NetBSD: clnt_vc.c,v 1.4 2000/07/14 08:40:42 fvdl Exp $ */ 2 3/* 4 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for 5 * unrestricted use provided that this legend is included on all tape 6 * media and as a part of the software program in whole or part. Users 7 * may copy or modify Sun RPC without charge, but are not authorized 8 * to license or distribute it to anyone else except as part of a product or 9 * program developed by the user. 10 * 11 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE 12 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR 13 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. 14 * 15 * Sun RPC is provided with no support and without any obligation on the 16 * part of Sun Microsystems, Inc. to assist in its use, correction, 17 * modification or enhancement. 18 * 19 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE 20 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC 21 * OR ANY PART THEREOF. 22 * 23 * In no event will Sun Microsystems, Inc. be liable for any lost revenue 24 * or profits or other special, indirect and consequential damages, even if 25 * Sun has been advised of the possibility of such damages. 26 * 27 * Sun Microsystems, Inc. 28 * 2550 Garcia Avenue 29 * Mountain View, California 94043 30 */ 31 32#if defined(LIBC_SCCS) && !defined(lint) 33static char *sccsid2 = "@(#)clnt_tcp.c 1.37 87/10/05 Copyr 1984 Sun Micro"; 34static char *sccsid = "@(#)clnt_tcp.c 2.2 88/08/01 4.0 RPCSRC"; 35static char sccsid3[] = "@(#)clnt_vc.c 1.19 89/03/16 Copyr 1988 Sun Micro"; 36#endif 37#include <sys/cdefs.h> 38__FBSDID("$FreeBSD: head/sys/rpc/clnt_vc.c 193437 2009-06-04 14:49:27Z rmacklem $"); 39 40/* 41 * clnt_tcp.c, Implements a TCP/IP based, client side RPC. 42 * 43 * Copyright (C) 1984, Sun Microsystems, Inc. 44 * 45 * TCP based RPC supports 'batched calls'. 46 * A sequence of calls may be batched-up in a send buffer. The rpc call 47 * return immediately to the client even though the call was not necessarily 48 * sent. The batching occurs if the results' xdr routine is NULL (0) AND 49 * the rpc timeout value is zero (see clnt.h, rpc). 50 * 51 * Clients should NOT casually batch calls that in fact return results; that is, 52 * the server side should be aware that a call is batched and not produce any 53 * return message. Batched calls that produce many result messages can 54 * deadlock (netlock) the client and the server.... 55 * 56 * Now go hang yourself. 57 */ 58 59#include <sys/param.h> 60#include <sys/systm.h> 61#include <sys/lock.h> 62#include <sys/malloc.h> 63#include <sys/mbuf.h> 64#include <sys/mutex.h> 65#include <sys/pcpu.h> 66#include <sys/proc.h> 67#include <sys/protosw.h> 68#include <sys/socket.h> 69#include <sys/socketvar.h> 70#include <sys/syslog.h> 71#include <sys/time.h> 72#include <sys/uio.h> 73#include <netinet/tcp.h> 74 75#include <rpc/rpc.h> 76#include <rpc/rpc_com.h> 77 78#define MCALL_MSG_SIZE 24 79 80struct cmessage { 81 struct cmsghdr cmsg; 82 struct cmsgcred cmcred; 83}; 84 85static enum clnt_stat clnt_vc_call(CLIENT *, struct rpc_callextra *, 86 rpcproc_t, struct mbuf *, struct mbuf **, struct timeval); 87static void clnt_vc_geterr(CLIENT *, struct rpc_err *); 88static bool_t clnt_vc_freeres(CLIENT *, xdrproc_t, void *); 89static void clnt_vc_abort(CLIENT *); 90static bool_t clnt_vc_control(CLIENT *, u_int, void *); 91static void clnt_vc_close(CLIENT *); 92static void clnt_vc_destroy(CLIENT *); 93static bool_t time_not_ok(struct timeval *); 94static int clnt_vc_soupcall(struct socket *so, void *arg, int waitflag); 95 96static struct clnt_ops clnt_vc_ops = { 97 .cl_call = clnt_vc_call, 98 .cl_abort = clnt_vc_abort, 99 .cl_geterr = clnt_vc_geterr, 100 .cl_freeres = clnt_vc_freeres, 101 .cl_close = clnt_vc_close, 102 .cl_destroy = clnt_vc_destroy, 103 .cl_control = clnt_vc_control 104}; 105 106/* 107 * A pending RPC request which awaits a reply. Requests which have 108 * received their reply will have cr_xid set to zero and cr_mrep to 109 * the mbuf chain of the reply. 110 */ 111struct ct_request { 112 TAILQ_ENTRY(ct_request) cr_link; 113 uint32_t cr_xid; /* XID of request */ 114 struct mbuf *cr_mrep; /* reply received by upcall */ 115 int cr_error; /* any error from upcall */ 116 char cr_verf[MAX_AUTH_BYTES]; /* reply verf */ 117}; 118 119TAILQ_HEAD(ct_request_list, ct_request); 120 121struct ct_data { 122 struct mtx ct_lock; 123 int ct_threads; /* number of threads in clnt_vc_call */ 124 bool_t ct_closing; /* TRUE if we are closing */ 125 bool_t ct_closed; /* TRUE if we are closed */ 126 struct socket *ct_socket; /* connection socket */ 127 bool_t ct_closeit; /* close it on destroy */ 128 struct timeval ct_wait; /* wait interval in milliseconds */ 129 struct sockaddr_storage ct_addr; /* remote addr */ 130 struct rpc_err ct_error; 131 uint32_t ct_xid; 132 char ct_mcallc[MCALL_MSG_SIZE]; /* marshalled callmsg */ 133 size_t ct_mpos; /* pos after marshal */ 134 const char *ct_waitchan; 135 int ct_waitflag; 136 struct mbuf *ct_record; /* current reply record */ 137 size_t ct_record_resid; /* how much left of reply to read */ 138 bool_t ct_record_eor; /* true if reading last fragment */ 139 struct ct_request_list ct_pending; 140 int ct_upcallrefs; /* Ref cnt of upcalls in prog. */ 141}; 142 143static void clnt_vc_upcallsdone(struct ct_data *); 144 145static const char clnt_vc_errstr[] = "%s : %s"; 146static const char clnt_vc_str[] = "clnt_vc_create"; 147static const char clnt_read_vc_str[] = "read_vc"; 148static const char __no_mem_str[] = "out of memory"; 149 150/* 151 * Create a client handle for a connection. 152 * Default options are set, which the user can change using clnt_control()'s. 153 * The rpc/vc package does buffering similar to stdio, so the client 154 * must pick send and receive buffer sizes, 0 => use the default. 155 * NB: fd is copied into a private area. 156 * NB: The rpch->cl_auth is set null authentication. Caller may wish to 157 * set this something more useful. 158 * 159 * fd should be an open socket 160 */ 161CLIENT * 162clnt_vc_create( 163 struct socket *so, /* open file descriptor */ 164 struct sockaddr *raddr, /* servers address */ 165 const rpcprog_t prog, /* program number */ 166 const rpcvers_t vers, /* version number */ 167 size_t sendsz, /* buffer recv size */ 168 size_t recvsz) /* buffer send size */ 169{ 170 CLIENT *cl; /* client handle */ 171 struct ct_data *ct = NULL; /* client handle */ 172 struct timeval now; 173 struct rpc_msg call_msg; 174 static uint32_t disrupt; 175 struct __rpc_sockinfo si; 176 XDR xdrs; 177 int error, interrupted, one = 1; 178 struct sockopt sopt; 179 180 if (disrupt == 0) 181 disrupt = (uint32_t)(long)raddr; 182 183 cl = (CLIENT *)mem_alloc(sizeof (*cl)); 184 ct = (struct ct_data *)mem_alloc(sizeof (*ct)); 185 186 mtx_init(&ct->ct_lock, "ct->ct_lock", NULL, MTX_DEF); 187 ct->ct_threads = 0; 188 ct->ct_closing = FALSE; 189 ct->ct_closed = FALSE; 190 ct->ct_upcallrefs = 0; 191 192 if ((so->so_state & (SS_ISCONNECTED|SS_ISCONFIRMING)) == 0) { 193 error = soconnect(so, raddr, curthread); 194 SOCK_LOCK(so); 195 interrupted = 0; 196 while ((so->so_state & SS_ISCONNECTING) 197 && so->so_error == 0) { 198 error = msleep(&so->so_timeo, SOCK_MTX(so), 199 PSOCK | PCATCH, "connec", 0); 200 if (error) { 201 if (error == EINTR || error == ERESTART) 202 interrupted = 1; 203 break; 204 } 205 } 206 if (error == 0) { 207 error = so->so_error; 208 so->so_error = 0; 209 } 210 SOCK_UNLOCK(so); 211 if (error) { 212 if (!interrupted) 213 so->so_state &= ~SS_ISCONNECTING; 214 rpc_createerr.cf_stat = RPC_SYSTEMERROR; 215 rpc_createerr.cf_error.re_errno = error; 216 goto err; 217 } 218 } 219 220 if (!__rpc_socket2sockinfo(so, &si)) 221 goto err; 222 223 if (so->so_proto->pr_flags & PR_CONNREQUIRED) { 224 bzero(&sopt, sizeof(sopt)); 225 sopt.sopt_dir = SOPT_SET; 226 sopt.sopt_level = SOL_SOCKET; 227 sopt.sopt_name = SO_KEEPALIVE; 228 sopt.sopt_val = &one; 229 sopt.sopt_valsize = sizeof(one); 230 sosetopt(so, &sopt); 231 } 232 233 if (so->so_proto->pr_protocol == IPPROTO_TCP) { 234 bzero(&sopt, sizeof(sopt)); 235 sopt.sopt_dir = SOPT_SET; 236 sopt.sopt_level = IPPROTO_TCP; 237 sopt.sopt_name = TCP_NODELAY; 238 sopt.sopt_val = &one; 239 sopt.sopt_valsize = sizeof(one); 240 sosetopt(so, &sopt); 241 } 242 243 ct->ct_closeit = FALSE; 244 245 /* 246 * Set up private data struct 247 */ 248 ct->ct_socket = so; 249 ct->ct_wait.tv_sec = -1; 250 ct->ct_wait.tv_usec = -1; 251 memcpy(&ct->ct_addr, raddr, raddr->sa_len); 252 253 /* 254 * Initialize call message 255 */ 256 getmicrotime(&now); 257 ct->ct_xid = ((uint32_t)++disrupt) ^ __RPC_GETXID(&now); 258 call_msg.rm_xid = ct->ct_xid; 259 call_msg.rm_direction = CALL; 260 call_msg.rm_call.cb_rpcvers = RPC_MSG_VERSION; 261 call_msg.rm_call.cb_prog = (uint32_t)prog; 262 call_msg.rm_call.cb_vers = (uint32_t)vers; 263 264 /* 265 * pre-serialize the static part of the call msg and stash it away 266 */ 267 xdrmem_create(&xdrs, ct->ct_mcallc, MCALL_MSG_SIZE, 268 XDR_ENCODE); 269 if (! xdr_callhdr(&xdrs, &call_msg)) { 270 if (ct->ct_closeit) { 271 soclose(ct->ct_socket); 272 } 273 goto err; 274 } 275 ct->ct_mpos = XDR_GETPOS(&xdrs); 276 XDR_DESTROY(&xdrs); 277 ct->ct_waitchan = "rpcrecv"; 278 ct->ct_waitflag = 0; 279 280 /* 281 * Create a client handle which uses xdrrec for serialization 282 * and authnone for authentication. 283 */ 284 cl->cl_refs = 1; 285 cl->cl_ops = &clnt_vc_ops; 286 cl->cl_private = ct; 287 cl->cl_auth = authnone_create(); 288 sendsz = __rpc_get_t_size(si.si_af, si.si_proto, (int)sendsz); 289 recvsz = __rpc_get_t_size(si.si_af, si.si_proto, (int)recvsz); 290 soreserve(ct->ct_socket, sendsz, recvsz); 291 292 SOCKBUF_LOCK(&ct->ct_socket->so_rcv); 293 soupcall_set(ct->ct_socket, SO_RCV, clnt_vc_soupcall, ct); 294 SOCKBUF_UNLOCK(&ct->ct_socket->so_rcv); 295 296 ct->ct_record = NULL; 297 ct->ct_record_resid = 0; 298 TAILQ_INIT(&ct->ct_pending); 299 return (cl); 300 301err: 302 if (cl) { 303 if (ct) { 304 mtx_destroy(&ct->ct_lock); 305 mem_free(ct, sizeof (struct ct_data)); 306 } 307 if (cl) 308 mem_free(cl, sizeof (CLIENT)); 309 } 310 return ((CLIENT *)NULL); 311} 312 313static enum clnt_stat 314clnt_vc_call( 315 CLIENT *cl, /* client handle */ 316 struct rpc_callextra *ext, /* call metadata */ 317 rpcproc_t proc, /* procedure number */ 318 struct mbuf *args, /* pointer to args */ 319 struct mbuf **resultsp, /* pointer to results */ 320 struct timeval utimeout) 321{ 322 struct ct_data *ct = (struct ct_data *) cl->cl_private; 323 AUTH *auth; 324 struct rpc_err *errp; 325 enum clnt_stat stat; 326 XDR xdrs; 327 struct rpc_msg reply_msg; 328 bool_t ok; 329 int nrefreshes = 2; /* number of times to refresh cred */ 330 struct timeval timeout; 331 uint32_t xid; 332 struct mbuf *mreq = NULL, *results; 333 struct ct_request *cr; 334 int error; 335 336 cr = malloc(sizeof(struct ct_request), M_RPC, M_WAITOK); 337 338 mtx_lock(&ct->ct_lock); 339 340 if (ct->ct_closing || ct->ct_closed) { 341 mtx_unlock(&ct->ct_lock); 342 free(cr, M_RPC); 343 return (RPC_CANTSEND); 344 } 345 ct->ct_threads++; 346 347 if (ext) { 348 auth = ext->rc_auth; 349 errp = &ext->rc_err; 350 } else { 351 auth = cl->cl_auth; 352 errp = &ct->ct_error; 353 } 354 355 cr->cr_mrep = NULL; 356 cr->cr_error = 0; 357 358 if (ct->ct_wait.tv_usec == -1) { 359 timeout = utimeout; /* use supplied timeout */ 360 } else { 361 timeout = ct->ct_wait; /* use default timeout */ 362 } 363 364call_again: 365 mtx_assert(&ct->ct_lock, MA_OWNED); 366 367 ct->ct_xid++; 368 xid = ct->ct_xid; 369 370 mtx_unlock(&ct->ct_lock); 371 372 /* 373 * Leave space to pre-pend the record mark. 374 */ 375 MGETHDR(mreq, M_WAIT, MT_DATA); 376 mreq->m_data += sizeof(uint32_t); 377 KASSERT(ct->ct_mpos + sizeof(uint32_t) <= MHLEN, 378 ("RPC header too big")); 379 bcopy(ct->ct_mcallc, mreq->m_data, ct->ct_mpos); 380 mreq->m_len = ct->ct_mpos; 381 382 /* 383 * The XID is the first thing in the request. 384 */ 385 *mtod(mreq, uint32_t *) = htonl(xid); 386 387 xdrmbuf_create(&xdrs, mreq, XDR_ENCODE); 388 389 errp->re_status = stat = RPC_SUCCESS; 390 391 if ((! XDR_PUTINT32(&xdrs, &proc)) || 392 (! AUTH_MARSHALL(auth, xid, &xdrs, 393 m_copym(args, 0, M_COPYALL, M_WAITOK)))) { 394 errp->re_status = stat = RPC_CANTENCODEARGS; 395 mtx_lock(&ct->ct_lock); 396 goto out; 397 } 398 mreq->m_pkthdr.len = m_length(mreq, NULL); 399 400 /* 401 * Prepend a record marker containing the packet length. 402 */ 403 M_PREPEND(mreq, sizeof(uint32_t), M_WAIT); 404 *mtod(mreq, uint32_t *) = 405 htonl(0x80000000 | (mreq->m_pkthdr.len - sizeof(uint32_t))); 406 407 cr->cr_xid = xid; 408 mtx_lock(&ct->ct_lock); 409 TAILQ_INSERT_TAIL(&ct->ct_pending, cr, cr_link); 410 mtx_unlock(&ct->ct_lock); 411 412 /* 413 * sosend consumes mreq. 414 */ 415 error = sosend(ct->ct_socket, NULL, NULL, mreq, NULL, 0, curthread); 416 mreq = NULL; 417 if (error == EMSGSIZE) { 418 SOCKBUF_LOCK(&ct->ct_socket->so_snd); 419 sbwait(&ct->ct_socket->so_snd); 420 SOCKBUF_UNLOCK(&ct->ct_socket->so_snd); 421 AUTH_VALIDATE(auth, xid, NULL, NULL); 422 mtx_lock(&ct->ct_lock); 423 TAILQ_REMOVE(&ct->ct_pending, cr, cr_link); 424 goto call_again; 425 } 426 427 reply_msg.acpted_rply.ar_verf.oa_flavor = AUTH_NULL; 428 reply_msg.acpted_rply.ar_verf.oa_base = cr->cr_verf; 429 reply_msg.acpted_rply.ar_verf.oa_length = 0; 430 reply_msg.acpted_rply.ar_results.where = NULL; 431 reply_msg.acpted_rply.ar_results.proc = (xdrproc_t)xdr_void; 432 433 mtx_lock(&ct->ct_lock); 434 if (error) { 435 TAILQ_REMOVE(&ct->ct_pending, cr, cr_link); 436 errp->re_errno = error; 437 errp->re_status = stat = RPC_CANTSEND; 438 goto out; 439 } 440 441 /* 442 * Check to see if we got an upcall while waiting for the 443 * lock. In both these cases, the request has been removed 444 * from ct->ct_pending. 445 */ 446 if (cr->cr_error) { 447 TAILQ_REMOVE(&ct->ct_pending, cr, cr_link); 448 errp->re_errno = cr->cr_error; 449 errp->re_status = stat = RPC_CANTRECV; 450 goto out; 451 } 452 if (cr->cr_mrep) { 453 TAILQ_REMOVE(&ct->ct_pending, cr, cr_link); 454 goto got_reply; 455 } 456 457 /* 458 * Hack to provide rpc-based message passing 459 */ 460 if (timeout.tv_sec == 0 && timeout.tv_usec == 0) { 461 TAILQ_REMOVE(&ct->ct_pending, cr, cr_link); 462 errp->re_status = stat = RPC_TIMEDOUT; 463 goto out; 464 } 465 466 error = msleep(cr, &ct->ct_lock, ct->ct_waitflag, ct->ct_waitchan, 467 tvtohz(&timeout)); 468 469 TAILQ_REMOVE(&ct->ct_pending, cr, cr_link); 470 471 if (error) { 472 /* 473 * The sleep returned an error so our request is still 474 * on the list. Turn the error code into an 475 * appropriate client status. 476 */ 477 errp->re_errno = error; 478 switch (error) { 479 case EINTR: 480 stat = RPC_INTR; 481 break; 482 case EWOULDBLOCK: 483 stat = RPC_TIMEDOUT; 484 break; 485 default: 486 stat = RPC_CANTRECV; 487 } 488 errp->re_status = stat; 489 goto out; 490 } else { 491 /* 492 * We were woken up by the upcall. If the 493 * upcall had a receive error, report that, 494 * otherwise we have a reply. 495 */ 496 if (cr->cr_error) { 497 errp->re_errno = cr->cr_error; 498 errp->re_status = stat = RPC_CANTRECV; 499 goto out; 500 } 501 } 502 503got_reply: 504 /* 505 * Now decode and validate the response. We need to drop the 506 * lock since xdr_replymsg may end up sleeping in malloc. 507 */ 508 mtx_unlock(&ct->ct_lock); 509 510 if (ext && ext->rc_feedback) 511 ext->rc_feedback(FEEDBACK_OK, proc, ext->rc_feedback_arg); 512 513 xdrmbuf_create(&xdrs, cr->cr_mrep, XDR_DECODE); 514 ok = xdr_replymsg(&xdrs, &reply_msg); 515 cr->cr_mrep = NULL; 516 517 if (ok) { 518 if ((reply_msg.rm_reply.rp_stat == MSG_ACCEPTED) && 519 (reply_msg.acpted_rply.ar_stat == SUCCESS)) 520 errp->re_status = stat = RPC_SUCCESS; 521 else 522 stat = _seterr_reply(&reply_msg, errp); 523 524 if (stat == RPC_SUCCESS) { 525 results = xdrmbuf_getall(&xdrs); 526 if (!AUTH_VALIDATE(auth, xid, 527 &reply_msg.acpted_rply.ar_verf, 528 &results)) { 529 errp->re_status = stat = RPC_AUTHERROR; 530 errp->re_why = AUTH_INVALIDRESP; 531 } else { 532 KASSERT(results, 533 ("auth validated but no result")); 534 *resultsp = results; 535 } 536 } /* end successful completion */ 537 /* 538 * If unsuccesful AND error is an authentication error 539 * then refresh credentials and try again, else break 540 */ 541 else if (stat == RPC_AUTHERROR) 542 /* maybe our credentials need to be refreshed ... */ 543 if (nrefreshes > 0 && 544 AUTH_REFRESH(auth, &reply_msg)) { 545 nrefreshes--; 546 XDR_DESTROY(&xdrs); 547 mtx_lock(&ct->ct_lock); 548 goto call_again; 549 } 550 /* end of unsuccessful completion */ 551 } /* end of valid reply message */ 552 else { 553 errp->re_status = stat = RPC_CANTDECODERES; 554 } 555 XDR_DESTROY(&xdrs); 556 mtx_lock(&ct->ct_lock); 557out: 558 mtx_assert(&ct->ct_lock, MA_OWNED); 559 560 KASSERT(stat != RPC_SUCCESS || *resultsp, 561 ("RPC_SUCCESS without reply")); 562 563 if (mreq) 564 m_freem(mreq); 565 if (cr->cr_mrep) 566 m_freem(cr->cr_mrep); 567 568 ct->ct_threads--; 569 if (ct->ct_closing) 570 wakeup(ct); 571 572 mtx_unlock(&ct->ct_lock); 573 574 if (auth && stat != RPC_SUCCESS) 575 AUTH_VALIDATE(auth, xid, NULL, NULL); 576 577 free(cr, M_RPC); 578 579 return (stat); 580} 581 582static void 583clnt_vc_geterr(CLIENT *cl, struct rpc_err *errp) 584{ 585 struct ct_data *ct = (struct ct_data *) cl->cl_private; 586 587 *errp = ct->ct_error; 588} 589 590static bool_t 591clnt_vc_freeres(CLIENT *cl, xdrproc_t xdr_res, void *res_ptr) 592{ 593 XDR xdrs; 594 bool_t dummy; 595 596 xdrs.x_op = XDR_FREE; 597 dummy = (*xdr_res)(&xdrs, res_ptr); 598 599 return (dummy); 600} 601 602/*ARGSUSED*/ 603static void 604clnt_vc_abort(CLIENT *cl) 605{ 606} 607 608static bool_t 609clnt_vc_control(CLIENT *cl, u_int request, void *info) 610{ 611 struct ct_data *ct = (struct ct_data *)cl->cl_private; 612 void *infop = info; 613 614 mtx_lock(&ct->ct_lock); 615 616 switch (request) { 617 case CLSET_FD_CLOSE: 618 ct->ct_closeit = TRUE; 619 mtx_unlock(&ct->ct_lock); 620 return (TRUE); 621 case CLSET_FD_NCLOSE: 622 ct->ct_closeit = FALSE; 623 mtx_unlock(&ct->ct_lock); 624 return (TRUE); 625 default: 626 break; 627 } 628 629 /* for other requests which use info */ 630 if (info == NULL) { 631 mtx_unlock(&ct->ct_lock); 632 return (FALSE); 633 } 634 switch (request) { 635 case CLSET_TIMEOUT: 636 if (time_not_ok((struct timeval *)info)) { 637 mtx_unlock(&ct->ct_lock); 638 return (FALSE); 639 } 640 ct->ct_wait = *(struct timeval *)infop; 641 break; 642 case CLGET_TIMEOUT: 643 *(struct timeval *)infop = ct->ct_wait; 644 break; 645 case CLGET_SERVER_ADDR: 646 (void) memcpy(info, &ct->ct_addr, (size_t)ct->ct_addr.ss_len); 647 break; 648 case CLGET_SVC_ADDR: 649 /* 650 * Slightly different semantics to userland - we use 651 * sockaddr instead of netbuf. 652 */ 653 memcpy(info, &ct->ct_addr, ct->ct_addr.ss_len); 654 break; 655 case CLSET_SVC_ADDR: /* set to new address */ 656 mtx_unlock(&ct->ct_lock); 657 return (FALSE); 658 case CLGET_XID: 659 *(uint32_t *)info = ct->ct_xid; 660 break; 661 case CLSET_XID: 662 /* This will set the xid of the NEXT call */ 663 /* decrement by 1 as clnt_vc_call() increments once */ 664 ct->ct_xid = *(uint32_t *)info - 1; 665 break; 666 case CLGET_VERS: 667 /* 668 * This RELIES on the information that, in the call body, 669 * the version number field is the fifth field from the 670 * begining of the RPC header. MUST be changed if the 671 * call_struct is changed 672 */ 673 *(uint32_t *)info = 674 ntohl(*(uint32_t *)(void *)(ct->ct_mcallc + 675 4 * BYTES_PER_XDR_UNIT)); 676 break; 677 678 case CLSET_VERS: 679 *(uint32_t *)(void *)(ct->ct_mcallc + 680 4 * BYTES_PER_XDR_UNIT) = 681 htonl(*(uint32_t *)info); 682 break; 683 684 case CLGET_PROG: 685 /* 686 * This RELIES on the information that, in the call body, 687 * the program number field is the fourth field from the 688 * begining of the RPC header. MUST be changed if the 689 * call_struct is changed 690 */ 691 *(uint32_t *)info = 692 ntohl(*(uint32_t *)(void *)(ct->ct_mcallc + 693 3 * BYTES_PER_XDR_UNIT)); 694 break; 695 696 case CLSET_PROG: 697 *(uint32_t *)(void *)(ct->ct_mcallc + 698 3 * BYTES_PER_XDR_UNIT) = 699 htonl(*(uint32_t *)info); 700 break; 701 702 case CLSET_WAITCHAN: 703 ct->ct_waitchan = (const char *)info; 704 break; 705 706 case CLGET_WAITCHAN: 707 *(const char **) info = ct->ct_waitchan; 708 break; 709 710 case CLSET_INTERRUPTIBLE: 711 if (*(int *) info) 712 ct->ct_waitflag = PCATCH; 713 else 714 ct->ct_waitflag = 0; 715 break; 716 717 case CLGET_INTERRUPTIBLE: 718 if (ct->ct_waitflag) 719 *(int *) info = TRUE; 720 else 721 *(int *) info = FALSE; 722 break; 723 724 default: 725 mtx_unlock(&ct->ct_lock); 726 return (FALSE); 727 } 728 729 mtx_unlock(&ct->ct_lock); 730 return (TRUE); 731} 732 733static void 734clnt_vc_close(CLIENT *cl) 735{ 736 struct ct_data *ct = (struct ct_data *) cl->cl_private; 737 struct ct_request *cr; 738 739 mtx_lock(&ct->ct_lock); 740 741 if (ct->ct_closed) { 742 mtx_unlock(&ct->ct_lock); 743 return; 744 } 745 746 if (ct->ct_closing) { 747 while (ct->ct_closing) 748 msleep(ct, &ct->ct_lock, 0, "rpcclose", 0); 749 KASSERT(ct->ct_closed, ("client should be closed")); 750 mtx_unlock(&ct->ct_lock); 751 return; 752 } 753 754 if (ct->ct_socket) { 755 ct->ct_closing = TRUE; 756 mtx_unlock(&ct->ct_lock); 757 758 SOCKBUF_LOCK(&ct->ct_socket->so_rcv); 759 soupcall_clear(ct->ct_socket, SO_RCV); 760 clnt_vc_upcallsdone(ct); 761 SOCKBUF_UNLOCK(&ct->ct_socket->so_rcv); 762 763 /* 764 * Abort any pending requests and wait until everyone 765 * has finished with clnt_vc_call. 766 */ 767 mtx_lock(&ct->ct_lock); 768 TAILQ_FOREACH(cr, &ct->ct_pending, cr_link) { 769 cr->cr_xid = 0; 770 cr->cr_error = ESHUTDOWN; 771 wakeup(cr); 772 } 773 774 while (ct->ct_threads) 775 msleep(ct, &ct->ct_lock, 0, "rpcclose", 0); 776 } 777 778 ct->ct_closing = FALSE; 779 ct->ct_closed = TRUE; 780 mtx_unlock(&ct->ct_lock); 781 wakeup(ct); 782} 783 784static void 785clnt_vc_destroy(CLIENT *cl) 786{ 787 struct ct_data *ct = (struct ct_data *) cl->cl_private; 788 struct socket *so = NULL; 789 790 clnt_vc_close(cl); 791 792 mtx_lock(&ct->ct_lock); 793 794 if (ct->ct_socket) { 795 if (ct->ct_closeit) { 796 so = ct->ct_socket; 797 } 798 } 799 800 mtx_unlock(&ct->ct_lock); 801 802 mtx_destroy(&ct->ct_lock); 803 if (so) { 804 soshutdown(so, SHUT_WR); 805 soclose(so); 806 } 807 mem_free(ct, sizeof(struct ct_data)); 808 mem_free(cl, sizeof(CLIENT)); 809} 810 811/* 812 * Make sure that the time is not garbage. -1 value is disallowed. 813 * Note this is different from time_not_ok in clnt_dg.c 814 */ 815static bool_t 816time_not_ok(struct timeval *t) 817{ 818 return (t->tv_sec <= -1 || t->tv_sec > 100000000 || 819 t->tv_usec <= -1 || t->tv_usec > 1000000); 820} 821 822int 823clnt_vc_soupcall(struct socket *so, void *arg, int waitflag) 824{ 825 struct ct_data *ct = (struct ct_data *) arg; 826 struct uio uio; 827 struct mbuf *m; 828 struct ct_request *cr; 829 int error, rcvflag, foundreq; 830 uint32_t xid, header; 831 bool_t do_read; 832 833 ct->ct_upcallrefs++; 834 uio.uio_td = curthread; 835 do { 836 /* 837 * If ct_record_resid is zero, we are waiting for a 838 * record mark. 839 */ 840 if (ct->ct_record_resid == 0) { 841 842 /* 843 * Make sure there is either a whole record 844 * mark in the buffer or there is some other 845 * error condition 846 */ 847 do_read = FALSE; 848 if (so->so_rcv.sb_cc >= sizeof(uint32_t) 849 || (so->so_rcv.sb_state & SBS_CANTRCVMORE) 850 || so->so_error) 851 do_read = TRUE; 852 853 if (!do_read) 854 break; 855 856 SOCKBUF_UNLOCK(&so->so_rcv); 857 uio.uio_resid = sizeof(uint32_t); 858 m = NULL; 859 rcvflag = MSG_DONTWAIT | MSG_SOCALLBCK; 860 error = soreceive(so, NULL, &uio, &m, NULL, &rcvflag); 861 SOCKBUF_LOCK(&so->so_rcv); 862 863 if (error == EWOULDBLOCK) 864 break; 865 866 /* 867 * If there was an error, wake up all pending 868 * requests. 869 */ 870 if (error || uio.uio_resid > 0) { 871 wakeup_all: 872 mtx_lock(&ct->ct_lock); 873 if (!error) { 874 /* 875 * We must have got EOF trying 876 * to read from the stream. 877 */ 878 error = ECONNRESET; 879 } 880 ct->ct_error.re_status = RPC_CANTRECV; 881 ct->ct_error.re_errno = error; 882 TAILQ_FOREACH(cr, &ct->ct_pending, cr_link) { 883 cr->cr_error = error; 884 wakeup(cr); 885 } 886 mtx_unlock(&ct->ct_lock); 887 break; 888 } 889 bcopy(mtod(m, uint32_t *), &header, sizeof(uint32_t)); 890 header = ntohl(header); 891 ct->ct_record = NULL; 892 ct->ct_record_resid = header & 0x7fffffff; 893 ct->ct_record_eor = ((header & 0x80000000) != 0); 894 m_freem(m); 895 } else { 896 /* 897 * Wait until the socket has the whole record 898 * buffered. 899 */ 900 do_read = FALSE; 901 if (so->so_rcv.sb_cc >= ct->ct_record_resid 902 || (so->so_rcv.sb_state & SBS_CANTRCVMORE) 903 || so->so_error) 904 do_read = TRUE; 905 906 if (!do_read) 907 break; 908 909 /* 910 * We have the record mark. Read as much as 911 * the socket has buffered up to the end of 912 * this record. 913 */ 914 SOCKBUF_UNLOCK(&so->so_rcv); 915 uio.uio_resid = ct->ct_record_resid; 916 m = NULL; 917 rcvflag = MSG_DONTWAIT | MSG_SOCALLBCK; 918 error = soreceive(so, NULL, &uio, &m, NULL, &rcvflag); 919 SOCKBUF_LOCK(&so->so_rcv); 920 921 if (error == EWOULDBLOCK) 922 break; 923 924 if (error || uio.uio_resid == ct->ct_record_resid) 925 goto wakeup_all; 926 927 /* 928 * If we have part of the record already, 929 * chain this bit onto the end. 930 */ 931 if (ct->ct_record) 932 m_last(ct->ct_record)->m_next = m; 933 else 934 ct->ct_record = m; 935 936 ct->ct_record_resid = uio.uio_resid; 937 938 /* 939 * If we have the entire record, see if we can 940 * match it to a request. 941 */ 942 if (ct->ct_record_resid == 0 943 && ct->ct_record_eor) { 944 /* 945 * The XID is in the first uint32_t of 946 * the reply. 947 */ 948 if (ct->ct_record->m_len < sizeof(xid)) 949 ct->ct_record = 950 m_pullup(ct->ct_record, 951 sizeof(xid)); 952 if (!ct->ct_record) 953 break; 954 bcopy(mtod(ct->ct_record, uint32_t *), 955 &xid, sizeof(uint32_t)); 956 xid = ntohl(xid); 957 958 mtx_lock(&ct->ct_lock); 959 foundreq = 0; 960 TAILQ_FOREACH(cr, &ct->ct_pending, cr_link) { 961 if (cr->cr_xid == xid) { 962 /* 963 * This one 964 * matches. We leave 965 * the reply mbuf in 966 * cr->cr_mrep. Set 967 * the XID to zero so 968 * that we will ignore 969 * any duplicaed 970 * replies. 971 */ 972 cr->cr_xid = 0; 973 cr->cr_mrep = ct->ct_record; 974 cr->cr_error = 0; 975 foundreq = 1; 976 wakeup(cr); 977 break; 978 } 979 } 980 mtx_unlock(&ct->ct_lock); 981 982 if (!foundreq) 983 m_freem(ct->ct_record); 984 ct->ct_record = NULL; 985 } 986 } 987 } while (m); 988 ct->ct_upcallrefs--; 989 if (ct->ct_upcallrefs < 0) 990 panic("rpcvc upcall refcnt"); 991 if (ct->ct_upcallrefs == 0) 992 wakeup(&ct->ct_upcallrefs); 993 return (SU_OK); 994} 995 996/* 997 * Wait for all upcalls in progress to complete. 998 */ 999static void 1000clnt_vc_upcallsdone(struct ct_data *ct) 1001{ 1002 1003 SOCKBUF_LOCK_ASSERT(&ct->ct_socket->so_rcv); 1004 1005 while (ct->ct_upcallrefs > 0) 1006 (void) msleep(&ct->ct_upcallrefs, 1007 SOCKBUF_MTX(&ct->ct_socket->so_rcv), 0, "rpcvcup", 0); 1008} 1009