1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved. 23 * Copyright 2018 Nexenta Systems, Inc. All rights reserved. 24 * Copyright 2022 RackTop Systems, Inc. 25 */ 26 27 /* 28 * This module provides the interface to NDR RPC. 29 */ 30 31 #include <sys/stat.h> 32 #include <sys/uio.h> 33 #include <sys/ksynch.h> 34 #include <sys/stropts.h> 35 #include <sys/socket.h> 36 #include <sys/filio.h> 37 #include <smbsrv/smb_kproto.h> 38 #include <smbsrv/smb_xdr.h> 39 #include <smb/winioctl.h> 40 41 static uint32_t smb_opipe_wait(smb_request_t *, smb_fsctl_t *); 42 43 /* 44 * Allocate a new opipe and return it, or NULL, in which case 45 * the caller will report "internal error". 46 */ 47 static smb_opipe_t * 48 smb_opipe_alloc(smb_request_t *sr) 49 { 50 smb_server_t *sv = sr->sr_server; 51 smb_opipe_t *opipe; 52 ksocket_t sock; 53 54 if (ksocket_socket(&sock, AF_UNIX, SOCK_STREAM, 0, 55 KSOCKET_SLEEP, sr->user_cr) != 0) 56 return (NULL); 57 58 opipe = kmem_cache_alloc(smb_cache_opipe, KM_SLEEP); 59 60 bzero(opipe, sizeof (smb_opipe_t)); 61 mutex_init(&opipe->p_mutex, NULL, MUTEX_DEFAULT, NULL); 62 cv_init(&opipe->p_cv, NULL, CV_DEFAULT, NULL); 63 opipe->p_magic = SMB_OPIPE_MAGIC; 64 opipe->p_server = sv; 65 opipe->p_refcnt = 1; 66 opipe->p_socket = sock; 67 68 return (opipe); 69 } 70 71 /* 72 * Destroy an opipe. This is normally called from smb_ofile_delete 73 * when the ofile has no more references and is about to be free'd. 74 * This is also called here in error handling code paths, before 75 * the opipe is installed under an ofile. 76 */ 77 void 78 smb_opipe_dealloc(smb_opipe_t *opipe) 79 { 80 smb_server_t *sv; 81 82 SMB_OPIPE_VALID(opipe); 83 sv = opipe->p_server; 84 SMB_SERVER_VALID(sv); 85 86 /* 87 * This is called in the error path when opening, 88 * in which case we close the socket here. 89 */ 90 if (opipe->p_socket != NULL) 91 (void) ksocket_close(opipe->p_socket, zone_kcred()); 92 93 opipe->p_magic = (uint32_t)~SMB_OPIPE_MAGIC; 94 cv_destroy(&opipe->p_cv); 95 mutex_destroy(&opipe->p_mutex); 96 97 kmem_cache_free(smb_cache_opipe, opipe); 98 } 99 100 /* 101 * Unblock a request that might be blocked reading some 102 * pipe (AF_UNIX socket). We don't have an easy way to 103 * interrupt just the thread servicing this request, so 104 * we shutdown(3socket) the socket, waking all readers. 105 * That's a bit heavy-handed, making the socket unusable 106 * after this, so we do this only when disconnecting a 107 * session (i.e. stopping the SMB service), and not when 108 * handling an SMB2_cancel or SMB_nt_cancel request. 109 */ 110 static void 111 smb_opipe_cancel(smb_request_t *sr) 112 { 113 ksocket_t so; 114 115 switch (sr->session->s_state) { 116 case SMB_SESSION_STATE_DISCONNECTED: 117 case SMB_SESSION_STATE_TERMINATED: 118 if ((so = sr->cancel_arg2) != NULL) 119 (void) ksocket_shutdown(so, SHUT_RDWR, sr->user_cr); 120 break; 121 } 122 } 123 124 /* 125 * Helper for open: build pipe name and connect. 126 */ 127 static int 128 smb_opipe_connect(smb_request_t *sr, smb_opipe_t *opipe) 129 { 130 struct sockaddr_un saddr; 131 smb_arg_open_t *op = &sr->sr_open; 132 const char *name; 133 int rc; 134 135 name = op->fqi.fq_path.pn_path; 136 name += strspn(name, "\\"); 137 if (smb_strcasecmp(name, "PIPE", 4) == 0) { 138 name += 4; 139 name += strspn(name, "\\"); 140 } 141 (void) strlcpy(opipe->p_name, name, SMB_OPIPE_MAXNAME); 142 (void) smb_strlwr(opipe->p_name); 143 144 bzero(&saddr, sizeof (saddr)); 145 saddr.sun_family = AF_UNIX; 146 (void) snprintf(saddr.sun_path, sizeof (saddr.sun_path), 147 "%s/%s", SMB_PIPE_DIR, opipe->p_name); 148 rc = ksocket_connect(opipe->p_socket, (struct sockaddr *)&saddr, 149 sizeof (saddr), sr->user_cr); 150 151 return (rc); 152 } 153 154 static int 155 smb_opipe_exists(char *name) 156 { 157 struct sockaddr_un saddr; 158 vnode_t *vp; /* Underlying filesystem vnode */ 159 int err; 160 161 bzero(&saddr, sizeof (saddr)); 162 saddr.sun_family = AF_UNIX; 163 (void) snprintf(saddr.sun_path, sizeof (saddr.sun_path), 164 "%s/%s", SMB_PIPE_DIR, name); 165 166 err = lookupname(saddr.sun_path, UIO_SYSSPACE, FOLLOW, NULLVPP, &vp); 167 if (err == 0) { 168 VN_RELE(vp); /* release hold from lookup */ 169 } 170 171 return (err); 172 } 173 174 175 /* 176 * Helper for open: encode and send the user info. 177 * 178 * We send information about this client + user to the 179 * pipe service so it can use it for access checks. 180 * The service MAY deny the open based on this info, 181 * (i.e. anonymous session trying to open a pipe that 182 * requires authentication) in which case we will read 183 * an error status from the service and return that. 184 */ 185 static void 186 smb_opipe_send_userinfo(smb_request_t *sr, smb_opipe_t *opipe, 187 smb_error_t *errp) 188 { 189 XDR xdrs; 190 smb_netuserinfo_t nui; 191 smb_pipehdr_t phdr; 192 char *buf; 193 uint32_t buflen; 194 uint32_t status; 195 size_t iocnt = 0; 196 int rc; 197 198 /* 199 * Any errors building the XDR message etc. 200 */ 201 errp->status = NT_STATUS_INTERNAL_ERROR; 202 203 smb_user_netinfo_init(sr->uid_user, &nui); 204 phdr.ph_magic = SMB_PIPE_HDR_MAGIC; 205 phdr.ph_uilen = xdr_sizeof(smb_netuserinfo_xdr, &nui); 206 207 buflen = sizeof (phdr) + phdr.ph_uilen; 208 buf = kmem_alloc(buflen, KM_SLEEP); 209 210 bcopy(&phdr, buf, sizeof (phdr)); 211 xdrmem_create(&xdrs, buf + sizeof (phdr), 212 buflen - (sizeof (phdr)), XDR_ENCODE); 213 if (!smb_netuserinfo_xdr(&xdrs, &nui)) 214 goto out; 215 216 mutex_enter(&sr->sr_mutex); 217 if (sr->sr_state != SMB_REQ_STATE_ACTIVE) { 218 mutex_exit(&sr->sr_mutex); 219 errp->status = NT_STATUS_CANCELLED; 220 goto out; 221 } 222 sr->sr_state = SMB_REQ_STATE_WAITING_PIPE; 223 sr->cancel_method = smb_opipe_cancel; 224 sr->cancel_arg2 = opipe->p_socket; 225 mutex_exit(&sr->sr_mutex); 226 227 rc = ksocket_send(opipe->p_socket, buf, buflen, 0, 228 &iocnt, sr->user_cr); 229 if (rc == 0 && iocnt != buflen) 230 rc = EIO; 231 if (rc == 0) 232 rc = ksocket_recv(opipe->p_socket, &status, sizeof (status), 233 0, &iocnt, sr->user_cr); 234 if (rc == 0 && iocnt != sizeof (status)) 235 rc = EIO; 236 237 mutex_enter(&sr->sr_mutex); 238 sr->cancel_method = NULL; 239 sr->cancel_arg2 = NULL; 240 switch (sr->sr_state) { 241 case SMB_REQ_STATE_WAITING_PIPE: 242 sr->sr_state = SMB_REQ_STATE_ACTIVE; 243 break; 244 case SMB_REQ_STATE_CANCEL_PENDING: 245 sr->sr_state = SMB_REQ_STATE_CANCELLED; 246 rc = EINTR; 247 break; 248 default: 249 /* keep rc from above */ 250 break; 251 } 252 mutex_exit(&sr->sr_mutex); 253 254 255 /* 256 * Return the status we read from the pipe service, 257 * normally NT_STATUS_SUCCESS, but could be something 258 * else like NT_STATUS_ACCESS_DENIED. 259 */ 260 switch (rc) { 261 case 0: 262 errp->status = status; 263 break; 264 case EINTR: 265 errp->status = NT_STATUS_CANCELLED; 266 break; 267 /* 268 * If we fail sending the netuserinfo or recv'ing the 269 * status reponse, we have probably run into the limit 270 * on the number of open pipes. That's this status: 271 */ 272 default: 273 errp->status = NT_STATUS_PIPE_NOT_AVAILABLE; 274 break; 275 } 276 277 out: 278 xdr_destroy(&xdrs); 279 kmem_free(buf, buflen); 280 smb_user_netinfo_fini(&nui); 281 } 282 283 /* 284 * smb_opipe_open 285 * 286 * Open an RPC named pipe. This routine should be called if 287 * a file open is requested on a share of type STYPE_IPC. 288 * If we recognize the pipe, we setup a new ofile. 289 * 290 * Returns 0 on success, Otherwise an NT status code. 291 */ 292 int 293 smb_opipe_open(smb_request_t *sr, smb_ofile_t *ofile) 294 { 295 smb_arg_open_t *op = &sr->sr_open; 296 smb_attr_t *ap = &op->fqi.fq_fattr; 297 smb_opipe_t *opipe; 298 smb_error_t err; 299 300 opipe = smb_opipe_alloc(sr); 301 if (opipe == NULL) 302 return (NT_STATUS_INTERNAL_ERROR); 303 304 if (smb_opipe_connect(sr, opipe) != 0) { 305 smb_opipe_dealloc(opipe); 306 return (NT_STATUS_OBJECT_NAME_NOT_FOUND); 307 } 308 309 smb_opipe_send_userinfo(sr, opipe, &err); 310 if (err.status != 0) { 311 smb_opipe_dealloc(opipe); 312 return (err.status); 313 } 314 315 /* 316 * We might have blocked in smb_opipe_connect long enough so 317 * a tree disconnect might have happened. In that case, we 318 * would be adding an ofile to a tree that's disconnecting, 319 * which would interfere with tear-down. 320 */ 321 if (!smb_tree_is_connected(sr->tid_tree)) { 322 smb_opipe_dealloc(opipe); 323 return (NT_STATUS_NETWORK_NAME_DELETED); 324 } 325 326 /* 327 * Note: The new opipe is given to smb_ofile_open 328 * via op->pipe 329 */ 330 op->pipe = opipe; 331 smb_ofile_open(sr, op, ofile); 332 op->pipe = NULL; 333 334 /* An "up" pointer, for debug. */ 335 opipe->p_ofile = ofile; 336 337 /* 338 * Caller expects attributes in op->fqi 339 */ 340 (void) smb_opipe_getattr(ofile, &op->fqi.fq_fattr); 341 342 op->dsize = 0; 343 op->dattr = ap->sa_dosattr; 344 op->fileid = ap->sa_vattr.va_nodeid; 345 op->ftype = SMB_FTYPE_MESG_PIPE; 346 op->action_taken = SMB_OACT_OPLOCK | SMB_OACT_OPENED; 347 op->devstate = SMB_PIPE_READMODE_MESSAGE 348 | SMB_PIPE_TYPE_MESSAGE 349 | SMB_PIPE_UNLIMITED_INSTANCES; /* 0x05ff */ 350 351 sr->smb_fid = ofile->f_fid; 352 sr->fid_ofile = ofile; 353 354 return (NT_STATUS_SUCCESS); 355 } 356 357 /* 358 * smb_opipe_close 359 * 360 * Called by smb_ofile_close for pipes. 361 * 362 * Note: ksocket_close may block while waiting for 363 * any I/O threads with a hold to get out. 364 */ 365 void 366 smb_opipe_close(smb_ofile_t *of) 367 { 368 smb_opipe_t *opipe; 369 ksocket_t sock; 370 371 ASSERT(of->f_state == SMB_OFILE_STATE_CLOSING); 372 ASSERT(of->f_ftype == SMB_FTYPE_MESG_PIPE); 373 opipe = of->f_pipe; 374 SMB_OPIPE_VALID(opipe); 375 376 mutex_enter(&opipe->p_mutex); 377 sock = opipe->p_socket; 378 opipe->p_socket = NULL; 379 mutex_exit(&opipe->p_mutex); 380 381 (void) ksocket_shutdown(sock, SHUT_RDWR, of->f_cr); 382 (void) ksocket_close(sock, of->f_cr); 383 } 384 385 /* 386 * smb_opipe_write 387 * 388 * Write RPC request data to the pipe. The client should call smb_opipe_read 389 * to complete the exchange and obtain the RPC response. 390 * 391 * Returns 0 on success or an errno on failure. 392 */ 393 int 394 smb_opipe_write(smb_request_t *sr, struct uio *uio) 395 { 396 struct nmsghdr msghdr; 397 smb_ofile_t *ofile; 398 smb_opipe_t *opipe; 399 ksocket_t sock; 400 size_t sent = 0; 401 int rc = 0; 402 403 ofile = sr->fid_ofile; 404 ASSERT(ofile->f_ftype == SMB_FTYPE_MESG_PIPE); 405 opipe = ofile->f_pipe; 406 SMB_OPIPE_VALID(opipe); 407 408 mutex_enter(&opipe->p_mutex); 409 sock = opipe->p_socket; 410 if (sock != NULL) 411 ksocket_hold(sock); 412 mutex_exit(&opipe->p_mutex); 413 if (sock == NULL) 414 return (EBADF); 415 416 bzero(&msghdr, sizeof (msghdr)); 417 msghdr.msg_iov = uio->uio_iov; 418 msghdr.msg_iovlen = uio->uio_iovcnt; 419 420 /* 421 * This should block until we've sent it all, 422 * or given up due to errors (pipe closed). 423 */ 424 while (uio->uio_resid > 0) { 425 rc = ksocket_sendmsg(sock, &msghdr, 0, &sent, ofile->f_cr); 426 if (rc != 0) 427 break; 428 uio->uio_resid -= sent; 429 } 430 431 ksocket_rele(sock); 432 433 return (rc); 434 } 435 436 /* 437 * smb_opipe_read 438 * 439 * This interface may be called from smb_opipe_transact (write, read) 440 * or from smb_read / smb2_read to get the rest of an RPC response. 441 * The response data (and length) are returned via the uio. 442 */ 443 int 444 smb_opipe_read(smb_request_t *sr, struct uio *uio) 445 { 446 struct nmsghdr msghdr; 447 smb_ofile_t *ofile; 448 smb_opipe_t *opipe; 449 ksocket_t sock; 450 size_t recvcnt = 0; 451 int rc; 452 453 ofile = sr->fid_ofile; 454 ASSERT(ofile->f_ftype == SMB_FTYPE_MESG_PIPE); 455 opipe = ofile->f_pipe; 456 SMB_OPIPE_VALID(opipe); 457 458 mutex_enter(&opipe->p_mutex); 459 sock = opipe->p_socket; 460 if (sock != NULL) 461 ksocket_hold(sock); 462 mutex_exit(&opipe->p_mutex); 463 if (sock == NULL) 464 return (EBADF); 465 466 mutex_enter(&sr->sr_mutex); 467 if (sr->sr_state != SMB_REQ_STATE_ACTIVE) { 468 mutex_exit(&sr->sr_mutex); 469 rc = EINTR; 470 goto out; 471 } 472 sr->sr_state = SMB_REQ_STATE_WAITING_PIPE; 473 sr->cancel_method = smb_opipe_cancel; 474 sr->cancel_arg2 = sock; 475 mutex_exit(&sr->sr_mutex); 476 477 /* 478 * This should block only if there's no data. 479 * A single call to recvmsg does just that. 480 * (Intentionaly no recv loop here.) 481 */ 482 bzero(&msghdr, sizeof (msghdr)); 483 msghdr.msg_iov = uio->uio_iov; 484 msghdr.msg_iovlen = uio->uio_iovcnt; 485 rc = ksocket_recvmsg(sock, &msghdr, 0, 486 &recvcnt, ofile->f_cr); 487 488 mutex_enter(&sr->sr_mutex); 489 sr->cancel_method = NULL; 490 sr->cancel_arg2 = NULL; 491 switch (sr->sr_state) { 492 case SMB_REQ_STATE_WAITING_PIPE: 493 sr->sr_state = SMB_REQ_STATE_ACTIVE; 494 break; 495 case SMB_REQ_STATE_CANCEL_PENDING: 496 sr->sr_state = SMB_REQ_STATE_CANCELLED; 497 rc = EINTR; 498 break; 499 default: 500 /* keep rc from above */ 501 break; 502 } 503 mutex_exit(&sr->sr_mutex); 504 505 if (rc != 0) 506 goto out; 507 508 if (recvcnt == 0) { 509 /* Other side closed. */ 510 rc = EPIPE; 511 goto out; 512 } 513 uio->uio_resid -= recvcnt; 514 515 out: 516 ksocket_rele(sock); 517 518 return (rc); 519 } 520 521 int 522 smb_opipe_ioctl(smb_request_t *sr, int cmd, void *arg, int *rvalp) 523 { 524 smb_ofile_t *ofile; 525 smb_opipe_t *opipe; 526 ksocket_t sock; 527 int rc; 528 529 ofile = sr->fid_ofile; 530 ASSERT(ofile->f_ftype == SMB_FTYPE_MESG_PIPE); 531 opipe = ofile->f_pipe; 532 SMB_OPIPE_VALID(opipe); 533 534 mutex_enter(&opipe->p_mutex); 535 sock = opipe->p_socket; 536 if (sock != NULL) 537 ksocket_hold(sock); 538 mutex_exit(&opipe->p_mutex); 539 if (sock == NULL) 540 return (EBADF); 541 542 rc = ksocket_ioctl(sock, cmd, (intptr_t)arg, rvalp, ofile->f_cr); 543 544 ksocket_rele(sock); 545 546 return (rc); 547 } 548 549 /* 550 * Get the smb_attr_t for a named pipe. 551 * Caller has already cleared to zero. 552 */ 553 int 554 smb_opipe_getattr(smb_ofile_t *of, smb_attr_t *ap) 555 { 556 557 if (of->f_pipe == NULL) 558 return (EINVAL); 559 560 ap->sa_vattr.va_type = VFIFO; 561 ap->sa_vattr.va_nlink = 1; 562 ap->sa_vattr.va_nodeid = (uintptr_t)of->f_pipe; 563 ap->sa_dosattr = FILE_ATTRIBUTE_NORMAL; 564 ap->sa_allocsz = SMB_PIPE_MAX_MSGSIZE; 565 566 return (0); 567 } 568 569 int 570 smb_opipe_getname(smb_ofile_t *of, char *buf, size_t buflen) 571 { 572 smb_opipe_t *opipe; 573 574 if ((opipe = of->f_pipe) == NULL) 575 return (EINVAL); 576 577 (void) snprintf(buf, buflen, "\\%s", opipe->p_name); 578 return (0); 579 } 580 581 /* 582 * Handle device type FILE_DEVICE_NAMED_PIPE 583 * for smb2_ioctl 584 */ 585 /* ARGSUSED */ 586 uint32_t 587 smb_opipe_fsctl(smb_request_t *sr, smb_fsctl_t *fsctl) 588 { 589 uint32_t status; 590 591 if (!STYPE_ISIPC(sr->tid_tree->t_res_type)) 592 return (NT_STATUS_INVALID_DEVICE_REQUEST); 593 594 switch (fsctl->CtlCode) { 595 case FSCTL_PIPE_TRANSCEIVE: 596 status = smb_opipe_transceive(sr, fsctl); 597 break; 598 599 case FSCTL_PIPE_PEEK: 600 status = NT_STATUS_INVALID_DEVICE_REQUEST; 601 break; 602 603 case FSCTL_PIPE_WAIT: 604 status = smb_opipe_wait(sr, fsctl); 605 break; 606 607 default: 608 ASSERT(!"CtlCode"); 609 status = NT_STATUS_INTERNAL_ERROR; 610 break; 611 } 612 613 return (status); 614 } 615 616 uint32_t 617 smb_opipe_transceive(smb_request_t *sr, smb_fsctl_t *fsctl) 618 { 619 smb_vdb_t vdb; 620 smb_ofile_t *ofile; 621 struct mbuf *mb; 622 uint32_t status; 623 int len, rc; 624 625 /* 626 * Caller checked that this is the IPC$ share, 627 * and that this call has a valid open handle. 628 * Just check the type. 629 */ 630 ofile = sr->fid_ofile; 631 if (ofile->f_ftype != SMB_FTYPE_MESG_PIPE) 632 return (NT_STATUS_INVALID_HANDLE); 633 634 rc = smb_mbc_decodef(fsctl->in_mbc, "#B", 635 fsctl->InputCount, &vdb); 636 if (rc != 0) { 637 /* Not enough data sent. */ 638 return (NT_STATUS_INVALID_PARAMETER); 639 } 640 641 rc = smb_opipe_write(sr, &vdb.vdb_uio); 642 if (rc != 0) 643 return (smb_errno2status(rc)); 644 645 vdb.vdb_tag = 0; 646 vdb.vdb_uio.uio_iov = &vdb.vdb_iovec[0]; 647 vdb.vdb_uio.uio_iovcnt = MAX_IOVEC; 648 vdb.vdb_uio.uio_segflg = UIO_SYSSPACE; 649 vdb.vdb_uio.uio_extflg = UIO_COPY_DEFAULT; 650 vdb.vdb_uio.uio_loffset = (offset_t)0; 651 vdb.vdb_uio.uio_resid = fsctl->MaxOutputResp; 652 mb = smb_mbuf_allocate(&vdb.vdb_uio); 653 654 rc = smb_opipe_read(sr, &vdb.vdb_uio); 655 if (rc != 0) { 656 m_freem(mb); 657 return (smb_errno2status(rc)); 658 } 659 660 len = fsctl->MaxOutputResp - vdb.vdb_uio.uio_resid; 661 smb_mbuf_trim(mb, len); 662 MBC_ATTACH_MBUF(fsctl->out_mbc, mb); 663 664 /* 665 * If the output buffer holds a partial pipe message, 666 * we're supposed to return NT_STATUS_BUFFER_OVERFLOW. 667 * As we don't have message boundary markers, the best 668 * we can do is return that status when we have ALL of: 669 * Output buffer was < SMB_PIPE_MAX_MSGSIZE 670 * We filled the output buffer (resid==0) 671 * There's more data (ioctl FIONREAD) 672 */ 673 status = NT_STATUS_SUCCESS; 674 if (fsctl->MaxOutputResp < SMB_PIPE_MAX_MSGSIZE && 675 vdb.vdb_uio.uio_resid == 0) { 676 int nread = 0, trval; 677 rc = smb_opipe_ioctl(sr, FIONREAD, &nread, &trval); 678 if (rc == 0 && nread != 0) 679 status = NT_STATUS_BUFFER_OVERFLOW; 680 } 681 682 return (status); 683 } 684 685 static uint32_t 686 smb_opipe_wait(smb_request_t *sr, smb_fsctl_t *fsctl) 687 { 688 char *name; 689 uint64_t timeout; 690 uint32_t namelen; 691 int rc; 692 uint8_t tflag; 693 694 rc = smb_mbc_decodef(fsctl->in_mbc, "qlb.", 695 &timeout, /* q */ 696 &namelen, /* l */ 697 &tflag); /* b */ 698 if (rc != 0) 699 return (NT_STATUS_INVALID_PARAMETER); 700 rc = smb_mbc_decodef(fsctl->in_mbc, "%#U", 701 sr, /* % */ 702 namelen, /* # */ 703 &name); /* U */ 704 if (rc != 0) 705 return (NT_STATUS_INVALID_PARAMETER); 706 707 rc = smb_opipe_exists(name); 708 if (rc != 0) 709 return (NT_STATUS_OBJECT_NAME_NOT_FOUND); 710 711 /* 712 * At this point we know the pipe exists. 713 * 714 * If the tflag is set, we're supposed to wait for up to 715 * timeout (100s of milliseconds) for a pipe "instance" 716 * to become "available" (so pipe open would work). 717 * However, this implementation has no need to wait, 718 * so just take a short delay instead. 719 */ 720 if (tflag != 0) { 721 clock_t ticks = MSEC_TO_TICK(timeout * 100); 722 if (ticks > MSEC_TO_TICK(100)) 723 ticks = MSEC_TO_TICK(100); 724 delay(ticks); 725 } 726 727 return (0); 728 } 729