clnt_vc.c revision 184588
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 184588 2008-11-03 10:38:00Z dfr $"); 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 void 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}; 141 142static const char clnt_vc_errstr[] = "%s : %s"; 143static const char clnt_vc_str[] = "clnt_vc_create"; 144static const char clnt_read_vc_str[] = "read_vc"; 145static const char __no_mem_str[] = "out of memory"; 146 147/* 148 * Create a client handle for a connection. 149 * Default options are set, which the user can change using clnt_control()'s. 150 * The rpc/vc package does buffering similar to stdio, so the client 151 * must pick send and receive buffer sizes, 0 => use the default. 152 * NB: fd is copied into a private area. 153 * NB: The rpch->cl_auth is set null authentication. Caller may wish to 154 * set this something more useful. 155 * 156 * fd should be an open socket 157 */ 158CLIENT * 159clnt_vc_create( 160 struct socket *so, /* open file descriptor */ 161 struct sockaddr *raddr, /* servers address */ 162 const rpcprog_t prog, /* program number */ 163 const rpcvers_t vers, /* version number */ 164 size_t sendsz, /* buffer recv size */ 165 size_t recvsz) /* buffer send size */ 166{ 167 CLIENT *cl; /* client handle */ 168 struct ct_data *ct = NULL; /* client handle */ 169 struct timeval now; 170 struct rpc_msg call_msg; 171 static uint32_t disrupt; 172 struct __rpc_sockinfo si; 173 XDR xdrs; 174 int error, interrupted, one = 1; 175 struct sockopt sopt; 176 177 if (disrupt == 0) 178 disrupt = (uint32_t)(long)raddr; 179 180 cl = (CLIENT *)mem_alloc(sizeof (*cl)); 181 ct = (struct ct_data *)mem_alloc(sizeof (*ct)); 182 183 mtx_init(&ct->ct_lock, "ct->ct_lock", NULL, MTX_DEF); 184 ct->ct_threads = 0; 185 ct->ct_closing = FALSE; 186 ct->ct_closed = FALSE; 187 188 if ((so->so_state & (SS_ISCONNECTED|SS_ISCONFIRMING)) == 0) { 189 error = soconnect(so, raddr, curthread); 190 SOCK_LOCK(so); 191 interrupted = 0; 192 while ((so->so_state & SS_ISCONNECTING) 193 && so->so_error == 0) { 194 error = msleep(&so->so_timeo, SOCK_MTX(so), 195 PSOCK | PCATCH, "connec", 0); 196 if (error) { 197 if (error == EINTR || error == ERESTART) 198 interrupted = 1; 199 break; 200 } 201 } 202 if (error == 0) { 203 error = so->so_error; 204 so->so_error = 0; 205 } 206 SOCK_UNLOCK(so); 207 if (error) { 208 if (!interrupted) 209 so->so_state &= ~SS_ISCONNECTING; 210 rpc_createerr.cf_stat = RPC_SYSTEMERROR; 211 rpc_createerr.cf_error.re_errno = error; 212 goto err; 213 } 214 } 215 216 if (!__rpc_socket2sockinfo(so, &si)) 217 goto err; 218 219 if (so->so_proto->pr_flags & PR_CONNREQUIRED) { 220 bzero(&sopt, sizeof(sopt)); 221 sopt.sopt_dir = SOPT_SET; 222 sopt.sopt_level = SOL_SOCKET; 223 sopt.sopt_name = SO_KEEPALIVE; 224 sopt.sopt_val = &one; 225 sopt.sopt_valsize = sizeof(one); 226 sosetopt(so, &sopt); 227 } 228 229 if (so->so_proto->pr_protocol == IPPROTO_TCP) { 230 bzero(&sopt, sizeof(sopt)); 231 sopt.sopt_dir = SOPT_SET; 232 sopt.sopt_level = IPPROTO_TCP; 233 sopt.sopt_name = TCP_NODELAY; 234 sopt.sopt_val = &one; 235 sopt.sopt_valsize = sizeof(one); 236 sosetopt(so, &sopt); 237 } 238 239 ct->ct_closeit = FALSE; 240 241 /* 242 * Set up private data struct 243 */ 244 ct->ct_socket = so; 245 ct->ct_wait.tv_sec = -1; 246 ct->ct_wait.tv_usec = -1; 247 memcpy(&ct->ct_addr, raddr, raddr->sa_len); 248 249 /* 250 * Initialize call message 251 */ 252 getmicrotime(&now); 253 ct->ct_xid = ((uint32_t)++disrupt) ^ __RPC_GETXID(&now); 254 call_msg.rm_xid = ct->ct_xid; 255 call_msg.rm_direction = CALL; 256 call_msg.rm_call.cb_rpcvers = RPC_MSG_VERSION; 257 call_msg.rm_call.cb_prog = (uint32_t)prog; 258 call_msg.rm_call.cb_vers = (uint32_t)vers; 259 260 /* 261 * pre-serialize the static part of the call msg and stash it away 262 */ 263 xdrmem_create(&xdrs, ct->ct_mcallc, MCALL_MSG_SIZE, 264 XDR_ENCODE); 265 if (! xdr_callhdr(&xdrs, &call_msg)) { 266 if (ct->ct_closeit) { 267 soclose(ct->ct_socket); 268 } 269 goto err; 270 } 271 ct->ct_mpos = XDR_GETPOS(&xdrs); 272 XDR_DESTROY(&xdrs); 273 ct->ct_waitchan = "rpcrecv"; 274 ct->ct_waitflag = 0; 275 276 /* 277 * Create a client handle which uses xdrrec for serialization 278 * and authnone for authentication. 279 */ 280 cl->cl_refs = 1; 281 cl->cl_ops = &clnt_vc_ops; 282 cl->cl_private = ct; 283 cl->cl_auth = authnone_create(); 284 sendsz = __rpc_get_t_size(si.si_af, si.si_proto, (int)sendsz); 285 recvsz = __rpc_get_t_size(si.si_af, si.si_proto, (int)recvsz); 286 soreserve(ct->ct_socket, sendsz, recvsz); 287 288 SOCKBUF_LOCK(&ct->ct_socket->so_rcv); 289 ct->ct_socket->so_upcallarg = ct; 290 ct->ct_socket->so_upcall = clnt_vc_soupcall; 291 ct->ct_socket->so_rcv.sb_flags |= SB_UPCALL; 292 SOCKBUF_UNLOCK(&ct->ct_socket->so_rcv); 293 294 ct->ct_record = NULL; 295 ct->ct_record_resid = 0; 296 TAILQ_INIT(&ct->ct_pending); 297 return (cl); 298 299err: 300 if (cl) { 301 if (ct) { 302 mem_free(ct, sizeof (struct ct_data)); 303 } 304 if (cl) 305 mem_free(cl, sizeof (CLIENT)); 306 } 307 return ((CLIENT *)NULL); 308} 309 310static enum clnt_stat 311clnt_vc_call( 312 CLIENT *cl, /* client handle */ 313 struct rpc_callextra *ext, /* call metadata */ 314 rpcproc_t proc, /* procedure number */ 315 struct mbuf *args, /* pointer to args */ 316 struct mbuf **resultsp, /* pointer to results */ 317 struct timeval utimeout) 318{ 319 struct ct_data *ct = (struct ct_data *) cl->cl_private; 320 AUTH *auth; 321 struct rpc_err *errp; 322 enum clnt_stat stat; 323 XDR xdrs; 324 struct rpc_msg reply_msg; 325 bool_t ok; 326 int nrefreshes = 2; /* number of times to refresh cred */ 327 struct timeval timeout; 328 uint32_t xid; 329 struct mbuf *mreq = NULL, *results; 330 struct ct_request *cr; 331 int error; 332 333 cr = malloc(sizeof(struct ct_request), M_RPC, M_WAITOK); 334 335 mtx_lock(&ct->ct_lock); 336 337 if (ct->ct_closing || ct->ct_closed) { 338 mtx_unlock(&ct->ct_lock); 339 free(cr, M_RPC); 340 return (RPC_CANTSEND); 341 } 342 ct->ct_threads++; 343 344 if (ext) { 345 auth = ext->rc_auth; 346 errp = &ext->rc_err; 347 } else { 348 auth = cl->cl_auth; 349 errp = &ct->ct_error; 350 } 351 352 cr->cr_mrep = NULL; 353 cr->cr_error = 0; 354 355 if (ct->ct_wait.tv_usec == -1) { 356 timeout = utimeout; /* use supplied timeout */ 357 } else { 358 timeout = ct->ct_wait; /* use default timeout */ 359 } 360 361call_again: 362 mtx_assert(&ct->ct_lock, MA_OWNED); 363 364 ct->ct_xid++; 365 xid = ct->ct_xid; 366 367 mtx_unlock(&ct->ct_lock); 368 369 /* 370 * Leave space to pre-pend the record mark. 371 */ 372 MGETHDR(mreq, M_WAIT, MT_DATA); 373 mreq->m_data += sizeof(uint32_t); 374 KASSERT(ct->ct_mpos + sizeof(uint32_t) <= MHLEN, 375 ("RPC header too big")); 376 bcopy(ct->ct_mcallc, mreq->m_data, ct->ct_mpos); 377 mreq->m_len = ct->ct_mpos; 378 379 /* 380 * The XID is the first thing in the request. 381 */ 382 *mtod(mreq, uint32_t *) = htonl(xid); 383 384 xdrmbuf_create(&xdrs, mreq, XDR_ENCODE); 385 386 errp->re_status = stat = RPC_SUCCESS; 387 388 if ((! XDR_PUTINT32(&xdrs, &proc)) || 389 (! AUTH_MARSHALL(auth, xid, &xdrs, 390 m_copym(args, 0, M_COPYALL, M_WAITOK)))) { 391 errp->re_status = stat = RPC_CANTENCODEARGS; 392 mtx_lock(&ct->ct_lock); 393 goto out; 394 } 395 mreq->m_pkthdr.len = m_length(mreq, NULL); 396 397 /* 398 * Prepend a record marker containing the packet length. 399 */ 400 M_PREPEND(mreq, sizeof(uint32_t), M_WAIT); 401 *mtod(mreq, uint32_t *) = 402 htonl(0x80000000 | (mreq->m_pkthdr.len - sizeof(uint32_t))); 403 404 cr->cr_xid = xid; 405 mtx_lock(&ct->ct_lock); 406 TAILQ_INSERT_TAIL(&ct->ct_pending, cr, cr_link); 407 mtx_unlock(&ct->ct_lock); 408 409 /* 410 * sosend consumes mreq. 411 */ 412 error = sosend(ct->ct_socket, NULL, NULL, mreq, NULL, 0, curthread); 413 mreq = NULL; 414 if (error == EMSGSIZE) { 415 SOCKBUF_LOCK(&ct->ct_socket->so_snd); 416 sbwait(&ct->ct_socket->so_snd); 417 SOCKBUF_UNLOCK(&ct->ct_socket->so_snd); 418 AUTH_VALIDATE(auth, xid, NULL, NULL); 419 mtx_lock(&ct->ct_lock); 420 TAILQ_REMOVE(&ct->ct_pending, cr, cr_link); 421 goto call_again; 422 } 423 424 reply_msg.acpted_rply.ar_verf.oa_flavor = AUTH_NULL; 425 reply_msg.acpted_rply.ar_verf.oa_base = cr->cr_verf; 426 reply_msg.acpted_rply.ar_verf.oa_length = 0; 427 reply_msg.acpted_rply.ar_results.where = NULL; 428 reply_msg.acpted_rply.ar_results.proc = (xdrproc_t)xdr_void; 429 430 mtx_lock(&ct->ct_lock); 431 if (error) { 432 TAILQ_REMOVE(&ct->ct_pending, cr, cr_link); 433 errp->re_errno = error; 434 errp->re_status = stat = RPC_CANTSEND; 435 goto out; 436 } 437 438 /* 439 * Check to see if we got an upcall while waiting for the 440 * lock. In both these cases, the request has been removed 441 * from ct->ct_pending. 442 */ 443 if (cr->cr_error) { 444 TAILQ_REMOVE(&ct->ct_pending, cr, cr_link); 445 errp->re_errno = cr->cr_error; 446 errp->re_status = stat = RPC_CANTRECV; 447 goto out; 448 } 449 if (cr->cr_mrep) { 450 TAILQ_REMOVE(&ct->ct_pending, cr, cr_link); 451 goto got_reply; 452 } 453 454 /* 455 * Hack to provide rpc-based message passing 456 */ 457 if (timeout.tv_sec == 0 && timeout.tv_usec == 0) { 458 TAILQ_REMOVE(&ct->ct_pending, cr, cr_link); 459 errp->re_status = stat = RPC_TIMEDOUT; 460 goto out; 461 } 462 463 error = msleep(cr, &ct->ct_lock, ct->ct_waitflag, ct->ct_waitchan, 464 tvtohz(&timeout)); 465 466 TAILQ_REMOVE(&ct->ct_pending, cr, cr_link); 467 468 if (error) { 469 /* 470 * The sleep returned an error so our request is still 471 * on the list. Turn the error code into an 472 * appropriate client status. 473 */ 474 errp->re_errno = error; 475 switch (error) { 476 case EINTR: 477 stat = RPC_INTR; 478 break; 479 case EWOULDBLOCK: 480 stat = RPC_TIMEDOUT; 481 break; 482 default: 483 stat = RPC_CANTRECV; 484 } 485 errp->re_status = stat; 486 goto out; 487 } else { 488 /* 489 * We were woken up by the upcall. If the 490 * upcall had a receive error, report that, 491 * otherwise we have a reply. 492 */ 493 if (cr->cr_error) { 494 errp->re_errno = cr->cr_error; 495 errp->re_status = stat = RPC_CANTRECV; 496 goto out; 497 } 498 } 499 500got_reply: 501 /* 502 * Now decode and validate the response. We need to drop the 503 * lock since xdr_replymsg may end up sleeping in malloc. 504 */ 505 mtx_unlock(&ct->ct_lock); 506 507 if (ext && ext->rc_feedback) 508 ext->rc_feedback(FEEDBACK_OK, proc, ext->rc_feedback_arg); 509 510 xdrmbuf_create(&xdrs, cr->cr_mrep, XDR_DECODE); 511 ok = xdr_replymsg(&xdrs, &reply_msg); 512 cr->cr_mrep = NULL; 513 514 if (ok) { 515 if ((reply_msg.rm_reply.rp_stat == MSG_ACCEPTED) && 516 (reply_msg.acpted_rply.ar_stat == SUCCESS)) 517 errp->re_status = stat = RPC_SUCCESS; 518 else 519 stat = _seterr_reply(&reply_msg, errp); 520 521 if (stat == RPC_SUCCESS) { 522 results = xdrmbuf_getall(&xdrs); 523 if (!AUTH_VALIDATE(auth, xid, 524 &reply_msg.acpted_rply.ar_verf, 525 &results)) { 526 errp->re_status = stat = RPC_AUTHERROR; 527 errp->re_why = AUTH_INVALIDRESP; 528 } else { 529 KASSERT(results, 530 ("auth validated but no result")); 531 *resultsp = results; 532 } 533 } /* end successful completion */ 534 /* 535 * If unsuccesful AND error is an authentication error 536 * then refresh credentials and try again, else break 537 */ 538 else if (stat == RPC_AUTHERROR) 539 /* maybe our credentials need to be refreshed ... */ 540 if (nrefreshes > 0 && 541 AUTH_REFRESH(auth, &reply_msg)) { 542 nrefreshes--; 543 XDR_DESTROY(&xdrs); 544 mtx_lock(&ct->ct_lock); 545 goto call_again; 546 } 547 /* end of unsuccessful completion */ 548 } /* end of valid reply message */ 549 else { 550 errp->re_status = stat = RPC_CANTDECODERES; 551 } 552 XDR_DESTROY(&xdrs); 553 mtx_lock(&ct->ct_lock); 554out: 555 mtx_assert(&ct->ct_lock, MA_OWNED); 556 557 KASSERT(stat != RPC_SUCCESS || *resultsp, 558 ("RPC_SUCCESS without reply")); 559 560 if (mreq) 561 m_freem(mreq); 562 if (cr->cr_mrep) 563 m_freem(cr->cr_mrep); 564 565 ct->ct_threads--; 566 if (ct->ct_closing) 567 wakeup(ct); 568 569 mtx_unlock(&ct->ct_lock); 570 571 if (auth && stat != RPC_SUCCESS) 572 AUTH_VALIDATE(auth, xid, NULL, NULL); 573 574 free(cr, M_RPC); 575 576 return (stat); 577} 578 579static void 580clnt_vc_geterr(CLIENT *cl, struct rpc_err *errp) 581{ 582 struct ct_data *ct = (struct ct_data *) cl->cl_private; 583 584 *errp = ct->ct_error; 585} 586 587static bool_t 588clnt_vc_freeres(CLIENT *cl, xdrproc_t xdr_res, void *res_ptr) 589{ 590 XDR xdrs; 591 bool_t dummy; 592 593 xdrs.x_op = XDR_FREE; 594 dummy = (*xdr_res)(&xdrs, res_ptr); 595 596 return (dummy); 597} 598 599/*ARGSUSED*/ 600static void 601clnt_vc_abort(CLIENT *cl) 602{ 603} 604 605static bool_t 606clnt_vc_control(CLIENT *cl, u_int request, void *info) 607{ 608 struct ct_data *ct = (struct ct_data *)cl->cl_private; 609 void *infop = info; 610 611 mtx_lock(&ct->ct_lock); 612 613 switch (request) { 614 case CLSET_FD_CLOSE: 615 ct->ct_closeit = TRUE; 616 mtx_unlock(&ct->ct_lock); 617 return (TRUE); 618 case CLSET_FD_NCLOSE: 619 ct->ct_closeit = FALSE; 620 mtx_unlock(&ct->ct_lock); 621 return (TRUE); 622 default: 623 break; 624 } 625 626 /* for other requests which use info */ 627 if (info == NULL) { 628 mtx_unlock(&ct->ct_lock); 629 return (FALSE); 630 } 631 switch (request) { 632 case CLSET_TIMEOUT: 633 if (time_not_ok((struct timeval *)info)) { 634 mtx_unlock(&ct->ct_lock); 635 return (FALSE); 636 } 637 ct->ct_wait = *(struct timeval *)infop; 638 break; 639 case CLGET_TIMEOUT: 640 *(struct timeval *)infop = ct->ct_wait; 641 break; 642 case CLGET_SERVER_ADDR: 643 (void) memcpy(info, &ct->ct_addr, (size_t)ct->ct_addr.ss_len); 644 break; 645 case CLGET_SVC_ADDR: 646 /* 647 * Slightly different semantics to userland - we use 648 * sockaddr instead of netbuf. 649 */ 650 memcpy(info, &ct->ct_addr, ct->ct_addr.ss_len); 651 break; 652 case CLSET_SVC_ADDR: /* set to new address */ 653 mtx_unlock(&ct->ct_lock); 654 return (FALSE); 655 case CLGET_XID: 656 *(uint32_t *)info = ct->ct_xid; 657 break; 658 case CLSET_XID: 659 /* This will set the xid of the NEXT call */ 660 /* decrement by 1 as clnt_vc_call() increments once */ 661 ct->ct_xid = *(uint32_t *)info - 1; 662 break; 663 case CLGET_VERS: 664 /* 665 * This RELIES on the information that, in the call body, 666 * the version number field is the fifth field from the 667 * begining of the RPC header. MUST be changed if the 668 * call_struct is changed 669 */ 670 *(uint32_t *)info = 671 ntohl(*(uint32_t *)(void *)(ct->ct_mcallc + 672 4 * BYTES_PER_XDR_UNIT)); 673 break; 674 675 case CLSET_VERS: 676 *(uint32_t *)(void *)(ct->ct_mcallc + 677 4 * BYTES_PER_XDR_UNIT) = 678 htonl(*(uint32_t *)info); 679 break; 680 681 case CLGET_PROG: 682 /* 683 * This RELIES on the information that, in the call body, 684 * the program number field is the fourth field from the 685 * begining of the RPC header. MUST be changed if the 686 * call_struct is changed 687 */ 688 *(uint32_t *)info = 689 ntohl(*(uint32_t *)(void *)(ct->ct_mcallc + 690 3 * BYTES_PER_XDR_UNIT)); 691 break; 692 693 case CLSET_PROG: 694 *(uint32_t *)(void *)(ct->ct_mcallc + 695 3 * BYTES_PER_XDR_UNIT) = 696 htonl(*(uint32_t *)info); 697 break; 698 699 case CLSET_WAITCHAN: 700 ct->ct_waitchan = (const char *)info; 701 break; 702 703 case CLGET_WAITCHAN: 704 *(const char **) info = ct->ct_waitchan; 705 break; 706 707 case CLSET_INTERRUPTIBLE: 708 if (*(int *) info) 709 ct->ct_waitflag = PCATCH; 710 else 711 ct->ct_waitflag = 0; 712 break; 713 714 case CLGET_INTERRUPTIBLE: 715 if (ct->ct_waitflag) 716 *(int *) info = TRUE; 717 else 718 *(int *) info = FALSE; 719 break; 720 721 default: 722 mtx_unlock(&ct->ct_lock); 723 return (FALSE); 724 } 725 726 mtx_unlock(&ct->ct_lock); 727 return (TRUE); 728} 729 730static void 731clnt_vc_close(CLIENT *cl) 732{ 733 struct ct_data *ct = (struct ct_data *) cl->cl_private; 734 struct ct_request *cr; 735 736 mtx_lock(&ct->ct_lock); 737 738 if (ct->ct_closed) { 739 mtx_unlock(&ct->ct_lock); 740 return; 741 } 742 743 if (ct->ct_closing) { 744 while (ct->ct_closing) 745 msleep(ct, &ct->ct_lock, 0, "rpcclose", 0); 746 KASSERT(ct->ct_closed, ("client should be closed")); 747 mtx_unlock(&ct->ct_lock); 748 return; 749 } 750 751 if (ct->ct_socket) { 752 SOCKBUF_LOCK(&ct->ct_socket->so_rcv); 753 ct->ct_socket->so_upcallarg = NULL; 754 ct->ct_socket->so_upcall = NULL; 755 ct->ct_socket->so_rcv.sb_flags &= ~SB_UPCALL; 756 SOCKBUF_UNLOCK(&ct->ct_socket->so_rcv); 757 758 /* 759 * Abort any pending requests and wait until everyone 760 * has finished with clnt_vc_call. 761 */ 762 ct->ct_closing = TRUE; 763 TAILQ_FOREACH(cr, &ct->ct_pending, cr_link) { 764 cr->cr_xid = 0; 765 cr->cr_error = ESHUTDOWN; 766 wakeup(cr); 767 } 768 769 while (ct->ct_threads) 770 msleep(ct, &ct->ct_lock, 0, "rpcclose", 0); 771 } 772 773 ct->ct_closing = FALSE; 774 ct->ct_closed = TRUE; 775 mtx_unlock(&ct->ct_lock); 776 wakeup(ct); 777} 778 779static void 780clnt_vc_destroy(CLIENT *cl) 781{ 782 struct ct_data *ct = (struct ct_data *) cl->cl_private; 783 struct socket *so = NULL; 784 785 clnt_vc_close(cl); 786 787 mtx_lock(&ct->ct_lock); 788 789 if (ct->ct_socket) { 790 if (ct->ct_closeit) { 791 so = ct->ct_socket; 792 } 793 } 794 795 mtx_unlock(&ct->ct_lock); 796 797 mtx_destroy(&ct->ct_lock); 798 if (so) { 799 soshutdown(so, SHUT_WR); 800 soclose(so); 801 } 802 mem_free(ct, sizeof(struct ct_data)); 803 mem_free(cl, sizeof(CLIENT)); 804} 805 806/* 807 * Make sure that the time is not garbage. -1 value is disallowed. 808 * Note this is different from time_not_ok in clnt_dg.c 809 */ 810static bool_t 811time_not_ok(struct timeval *t) 812{ 813 return (t->tv_sec <= -1 || t->tv_sec > 100000000 || 814 t->tv_usec <= -1 || t->tv_usec > 1000000); 815} 816 817void 818clnt_vc_soupcall(struct socket *so, void *arg, int waitflag) 819{ 820 struct ct_data *ct = (struct ct_data *) arg; 821 struct uio uio; 822 struct mbuf *m; 823 struct ct_request *cr; 824 int error, rcvflag, foundreq; 825 uint32_t xid, header; 826 bool_t do_read; 827 828 uio.uio_td = curthread; 829 do { 830 /* 831 * If ct_record_resid is zero, we are waiting for a 832 * record mark. 833 */ 834 if (ct->ct_record_resid == 0) { 835 836 /* 837 * Make sure there is either a whole record 838 * mark in the buffer or there is some other 839 * error condition 840 */ 841 do_read = FALSE; 842 SOCKBUF_LOCK(&so->so_rcv); 843 if (so->so_rcv.sb_cc >= sizeof(uint32_t) 844 || (so->so_rcv.sb_state & SBS_CANTRCVMORE) 845 || so->so_error) 846 do_read = TRUE; 847 SOCKBUF_UNLOCK(&so->so_rcv); 848 849 if (!do_read) 850 return; 851 852 uio.uio_resid = sizeof(uint32_t); 853 m = NULL; 854 rcvflag = MSG_DONTWAIT | MSG_SOCALLBCK; 855 error = soreceive(so, NULL, &uio, &m, NULL, &rcvflag); 856 857 if (error == EWOULDBLOCK) 858 break; 859 860 /* 861 * If there was an error, wake up all pending 862 * requests. 863 */ 864 if (error || uio.uio_resid > 0) { 865 wakeup_all: 866 mtx_lock(&ct->ct_lock); 867 if (!error) { 868 /* 869 * We must have got EOF trying 870 * to read from the stream. 871 */ 872 error = ECONNRESET; 873 } 874 ct->ct_error.re_status = RPC_CANTRECV; 875 ct->ct_error.re_errno = error; 876 TAILQ_FOREACH(cr, &ct->ct_pending, cr_link) { 877 cr->cr_error = error; 878 wakeup(cr); 879 } 880 mtx_unlock(&ct->ct_lock); 881 break; 882 } 883 bcopy(mtod(m, uint32_t *), &header, sizeof(uint32_t)); 884 header = ntohl(header); 885 ct->ct_record = NULL; 886 ct->ct_record_resid = header & 0x7fffffff; 887 ct->ct_record_eor = ((header & 0x80000000) != 0); 888 m_freem(m); 889 } else { 890 /* 891 * Wait until the socket has the whole record 892 * buffered. 893 */ 894 do_read = FALSE; 895 SOCKBUF_LOCK(&so->so_rcv); 896 if (so->so_rcv.sb_cc >= ct->ct_record_resid 897 || (so->so_rcv.sb_state & SBS_CANTRCVMORE) 898 || so->so_error) 899 do_read = TRUE; 900 SOCKBUF_UNLOCK(&so->so_rcv); 901 902 if (!do_read) 903 return; 904 905 /* 906 * We have the record mark. Read as much as 907 * the socket has buffered up to the end of 908 * this record. 909 */ 910 uio.uio_resid = ct->ct_record_resid; 911 m = NULL; 912 rcvflag = MSG_DONTWAIT | MSG_SOCALLBCK; 913 error = soreceive(so, NULL, &uio, &m, NULL, &rcvflag); 914 915 if (error == EWOULDBLOCK) 916 break; 917 918 if (error || uio.uio_resid == ct->ct_record_resid) 919 goto wakeup_all; 920 921 /* 922 * If we have part of the record already, 923 * chain this bit onto the end. 924 */ 925 if (ct->ct_record) 926 m_last(ct->ct_record)->m_next = m; 927 else 928 ct->ct_record = m; 929 930 ct->ct_record_resid = uio.uio_resid; 931 932 /* 933 * If we have the entire record, see if we can 934 * match it to a request. 935 */ 936 if (ct->ct_record_resid == 0 937 && ct->ct_record_eor) { 938 /* 939 * The XID is in the first uint32_t of 940 * the reply. 941 */ 942 if (ct->ct_record->m_len < sizeof(xid)) 943 ct->ct_record = 944 m_pullup(ct->ct_record, 945 sizeof(xid)); 946 if (!ct->ct_record) 947 break; 948 bcopy(mtod(ct->ct_record, uint32_t *), 949 &xid, sizeof(uint32_t)); 950 xid = ntohl(xid); 951 952 mtx_lock(&ct->ct_lock); 953 foundreq = 0; 954 TAILQ_FOREACH(cr, &ct->ct_pending, cr_link) { 955 if (cr->cr_xid == xid) { 956 /* 957 * This one 958 * matches. We leave 959 * the reply mbuf in 960 * cr->cr_mrep. Set 961 * the XID to zero so 962 * that we will ignore 963 * any duplicaed 964 * replies. 965 */ 966 cr->cr_xid = 0; 967 cr->cr_mrep = ct->ct_record; 968 cr->cr_error = 0; 969 foundreq = 1; 970 wakeup(cr); 971 break; 972 } 973 } 974 mtx_unlock(&ct->ct_lock); 975 976 if (!foundreq) 977 m_freem(ct->ct_record); 978 ct->ct_record = NULL; 979 } 980 } 981 } while (m); 982} 983