iscsi_main.c revision 1.35
1 /* $NetBSD: iscsi_main.c,v 1.35 2021/04/24 23:36:56 thorpej Exp $ */ 2 3 /*- 4 * Copyright (c) 2004,2005,2006,2011 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Wasabi Systems, Inc. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 #include "iscsi_globals.h" 32 33 #include <sys/systm.h> 34 #include <sys/buf.h> 35 #include <sys/file.h> 36 #include <sys/filedesc.h> 37 #include <sys/kmem.h> 38 #include <sys/socketvar.h> 39 #include <sys/sysctl.h> 40 41 #include "ioconf.h" 42 43 /*------------------------- Global Variables ------------------------*/ 44 45 extern struct cfdriver iscsi_cd; 46 47 #if defined(ISCSI_DEBUG) 48 int iscsi_debug_level = ISCSI_DEBUG; 49 #endif 50 bool iscsi_hex_bignums = false; 51 52 bool iscsi_detaching; 53 54 /* the list of sessions */ 55 session_list_t iscsi_sessions = TAILQ_HEAD_INITIALIZER(iscsi_sessions); 56 57 /* the number of active send threads (for cleanup thread) */ 58 uint32_t iscsi_num_send_threads = 0; 59 60 /* Our node name, alias, and ISID */ 61 uint8_t iscsi_InitiatorName[ISCSI_STRING_LENGTH] = ""; 62 uint8_t iscsi_InitiatorAlias[ISCSI_STRING_LENGTH] = ""; 63 login_isid_t iscsi_InitiatorISID; 64 65 /******************************************************************************/ 66 67 /* 68 System interface: autoconf and device structures 69 */ 70 71 static void iscsi_attach(device_t parent, device_t self, void *aux); 72 static int iscsi_match(device_t, cfdata_t, void *); 73 static int iscsi_detach(device_t, int); 74 75 struct iscsi_softc { 76 device_t dev; 77 kmutex_t lock; 78 TAILQ_HEAD(, iscsifd) fds; 79 }; 80 81 CFATTACH_DECL_NEW(iscsi, sizeof(struct iscsi_softc), iscsi_match, iscsi_attach, 82 iscsi_detach, NULL); 83 84 85 static dev_type_open(iscsiopen); 86 static int iscsiclose(struct file *); 87 88 static const struct fileops iscsi_fileops = { 89 .fo_name = "iscsi", 90 .fo_ioctl = iscsiioctl, 91 .fo_close = iscsiclose, 92 }; 93 94 struct cdevsw iscsi_cdevsw = { 95 .d_open = iscsiopen, 96 .d_close = noclose, 97 .d_read = noread, 98 .d_write = nowrite, 99 .d_ioctl = noioctl, 100 .d_stop = nostop, 101 .d_tty = notty, 102 .d_poll = nopoll, 103 .d_mmap = nommap, 104 .d_kqfilter = nokqfilter, 105 .d_discard = nodiscard, 106 .d_flag = D_OTHER 107 }; 108 109 /******************************************************************************/ 110 111 STATIC void iscsi_scsipi_request(struct scsipi_channel *, 112 scsipi_adapter_req_t, void *); 113 STATIC void iscsi_minphys(struct buf *); 114 115 /******************************************************************************/ 116 117 /******************************************************************************* 118 * Open and Close device interfaces. We don't really need them, because we don't 119 * have to keep track of device opens and closes from userland. But apps can't 120 * call ioctl without a handle to the device, and the kernel doesn't hand out 121 * handles without an open routine in the driver. So here they are in all their 122 * glory... 123 *******************************************************************************/ 124 125 int 126 iscsiopen(dev_t dev, int flag, int mode, struct lwp *l) 127 { 128 struct iscsifd *d; 129 struct iscsi_softc *sc; 130 struct file *fp; 131 int error, fd, unit; 132 133 unit = minor(dev); 134 135 DEB(99, ("ISCSI Open unit=%d\n",unit)); 136 137 sc = device_lookup_private(&iscsi_cd, unit); 138 if (sc == NULL) 139 return ENXIO; 140 141 if ((error = fd_allocfile(&fp, &fd)) != 0) 142 return error; 143 144 d = kmem_alloc(sizeof(*d), KM_SLEEP); 145 d->fd_dev = sc->dev; 146 d->fd_unit = unit; 147 148 mutex_enter(&sc->lock); 149 if (iscsi_detaching) { 150 mutex_exit(&sc->lock); 151 kmem_free(d, sizeof(*d)); 152 DEB(99, ("ISCSI Open aborting\n")); 153 fd_abort(curproc, fp, fd); 154 return ENXIO; 155 } 156 TAILQ_INSERT_TAIL(&sc->fds, d, fd_link); 157 mutex_exit(&sc->lock); 158 159 return fd_clone(fp, fd, flag, &iscsi_fileops, d); 160 } 161 162 static int 163 iscsiclose(struct file *fp) 164 { 165 struct iscsifd *d = fp->f_iscsi; 166 struct iscsi_softc *sc; 167 168 sc = device_lookup_private(&iscsi_cd, d->fd_unit); 169 if (sc == NULL) { 170 DEBOUT(("%s: Cannot find private data\n",__func__)); 171 return ENXIO; 172 } 173 174 mutex_enter(&sc->lock); 175 TAILQ_REMOVE(&sc->fds, d, fd_link); 176 mutex_exit(&sc->lock); 177 178 kmem_free(d, sizeof(*d)); 179 fp->f_iscsi = NULL; 180 181 DEB(99, ("ISCSI Close\n")); 182 return 0; 183 } 184 185 /******************************************************************************/ 186 187 /* 188 * The config Match routine. 189 * Not much to do here, either - this is a pseudo-device. 190 */ 191 192 static int 193 iscsi_match(device_t self, cfdata_t cfdata, void *arg) 194 { 195 return 1; 196 } 197 198 /* 199 * iscsiattach: 200 * Only called when statically configured into a kernel 201 */ 202 void 203 iscsiattach(int n) 204 { 205 int err; 206 cfdata_t cf; 207 208 err = config_cfattach_attach(iscsi_cd.cd_name, &iscsi_ca); 209 if (err) { 210 aprint_error("%s: couldn't register cfattach: %d\n", 211 iscsi_cd.cd_name, err); 212 config_cfdriver_detach(&iscsi_cd); 213 return; 214 } 215 216 if (n > 1) 217 aprint_error("%s: only one device supported\n", 218 iscsi_cd.cd_name); 219 220 cf = kmem_alloc(sizeof(struct cfdata), KM_SLEEP); 221 cf->cf_name = iscsi_cd.cd_name; 222 cf->cf_atname = iscsi_cd.cd_name; 223 cf->cf_unit = 0; 224 cf->cf_fstate = FSTATE_NOTFOUND; 225 226 (void)config_attach_pseudo(cf); 227 return; 228 } 229 230 /* 231 * iscsi_attach: 232 * One-time inits go here. Not much for now, probably even less later. 233 */ 234 static void 235 iscsi_attach(device_t parent, device_t self, void *aux) 236 { 237 struct iscsi_softc *sc; 238 239 DEB(1, ("ISCSI: iscsi_attach, parent=%p, self=%p, aux=%p\n", parent, 240 self, aux)); 241 sc = (struct iscsi_softc *) device_private(self); 242 sc->dev = self; 243 244 TAILQ_INIT(&sc->fds); 245 mutex_init(&sc->lock, MUTEX_DEFAULT, IPL_NONE); 246 247 iscsi_detaching = false; 248 iscsi_init_cleanup(); 249 250 if (!pmf_device_register(self, NULL, NULL)) 251 aprint_error_dev(self, "couldn't establish power handler\n"); 252 253 aprint_verbose("%s: attached. major = %d\n", iscsi_cd.cd_name, 254 cdevsw_lookup_major(&iscsi_cdevsw)); 255 } 256 257 /* 258 * iscsi_detach: 259 * Cleanup. 260 */ 261 static int 262 iscsi_detach(device_t self, int flags) 263 { 264 struct iscsi_softc *sc; 265 int error; 266 267 DEB(1, ("ISCSI: detach\n")); 268 sc = (struct iscsi_softc *) device_private(self); 269 270 mutex_enter(&sc->lock); 271 if (!TAILQ_EMPTY(&sc->fds)) { 272 mutex_exit(&sc->lock); 273 return EBUSY; 274 } 275 iscsi_detaching = true; 276 mutex_exit(&sc->lock); 277 278 error = kill_all_sessions(); 279 if (error) 280 return error; 281 282 error = iscsi_destroy_cleanup(); 283 if (error) 284 return error; 285 286 pmf_device_deregister(sc->dev); 287 288 mutex_destroy(&sc->lock); 289 290 return 0; 291 } 292 293 /******************************************************************************/ 294 295 typedef struct quirktab_t { 296 const char *tgt; 297 const char *iqn; 298 uint32_t quirks; 299 } quirktab_t; 300 301 static const quirktab_t quirktab[] = { 302 { "StarWind", "iqn.2008-08.com.starwindsoftware", PQUIRK_ONLYBIG }, 303 { "UNH", "iqn.2002-10.edu.unh.", 304 PQUIRK_NOBIGMODESENSE | 305 PQUIRK_NOMODESENSE | 306 PQUIRK_NOSYNCCACHE }, 307 { "NetBSD", "iqn.1994-04.org.netbsd.", 0 }, 308 { "Unknown", "unknown", 0 }, 309 { NULL, NULL, 0 } 310 }; 311 312 /* loop through the quirktab looking for a match on target name */ 313 static const quirktab_t * 314 getquirks(const char *iqn) 315 { 316 const quirktab_t *qp; 317 size_t iqnlen, quirklen; 318 319 if (iqn == NULL) 320 iqn = "unknown"; 321 iqnlen = strlen(iqn); 322 for (qp = quirktab ; qp->iqn ; qp++) { 323 quirklen = strlen(qp->iqn); 324 if (quirklen > iqnlen) 325 continue; 326 if (memcmp(qp->iqn, iqn, quirklen) == 0) 327 break; 328 } 329 return qp; 330 } 331 332 /******************************************************************************/ 333 334 /* 335 * map_session 336 * This (indirectly) maps the existing LUNs for a target to SCSI devices 337 * by going through config_found to tell any child drivers that there's 338 * a new adapter. 339 * Note that each session is equivalent to a SCSI adapter. 340 * 341 * Parameter: the session pointer 342 * 343 * Returns: 1 on success, 0 on failure 344 * 345 * ToDo: Figuring out how to handle more than one LUN. It appears that 346 * the NetBSD SCSI LUN discovery doesn't use "report LUNs", and instead 347 * goes through the LUNs sequentially, stopping somewhere on the way if it 348 * gets an error. We may have to do some LUN mapping in here if this is 349 * really how things work. 350 */ 351 352 int 353 map_session(session_t *sess, device_t dev) 354 { 355 struct scsipi_adapter *adapt = &sess->s_sc_adapter; 356 struct scsipi_channel *chan = &sess->s_sc_channel; 357 const quirktab_t *tgt; 358 359 mutex_enter(&sess->s_lock); 360 sess->s_send_window = max(2, window_size(sess, CCBS_FOR_SCSIPI)); 361 mutex_exit(&sess->s_lock); 362 363 /* 364 * Fill in the scsipi_adapter. 365 */ 366 adapt->adapt_dev = dev; 367 adapt->adapt_nchannels = 1; 368 adapt->adapt_request = iscsi_scsipi_request; 369 adapt->adapt_minphys = iscsi_minphys; 370 adapt->adapt_openings = sess->s_send_window; 371 adapt->adapt_max_periph = CCBS_FOR_SCSIPI; 372 adapt->adapt_flags = SCSIPI_ADAPT_MPSAFE; 373 374 /* 375 * Fill in the scsipi_channel. 376 */ 377 if ((tgt = getquirks(chan->chan_name)) == NULL) { 378 tgt = getquirks("unknown"); 379 } 380 chan->chan_name = tgt->tgt; 381 chan->chan_defquirks = tgt->quirks; 382 chan->chan_adapter = adapt; 383 chan->chan_bustype = &scsi_bustype; 384 chan->chan_channel = 0; 385 chan->chan_flags = SCSIPI_CHAN_NOSETTLE | SCSIPI_CHAN_CANGROW; 386 chan->chan_ntargets = 1; 387 chan->chan_nluns = 16; 388 chan->chan_id = sess->s_id; 389 390 sess->s_child_dev = config_found(dev, chan, scsiprint, CFARG_EOL); 391 392 return sess->s_child_dev != NULL; 393 } 394 395 396 /* 397 * unmap_session 398 * This (indirectly) unmaps the existing all LUNs for a target by 399 * telling the config system that the adapter has detached. 400 * 401 * Parameter: the session pointer 402 * 403 * Returns: 1 on success, 0 on failure 404 */ 405 406 int 407 unmap_session(session_t *sess) 408 { 409 device_t dev; 410 int rv = 1; 411 412 if ((dev = sess->s_child_dev) != NULL) { 413 sess->s_child_dev = NULL; 414 if (config_detach(dev, 0)) 415 rv = 0; 416 } 417 418 return rv; 419 } 420 421 /* 422 * grow_resources 423 * Try to grow openings up to current window size 424 */ 425 static int 426 grow_resources(session_t *sess) 427 { 428 struct scsipi_adapter *adapt = &sess->s_sc_adapter; 429 int win; 430 int rc = -1; 431 432 mutex_enter(&sess->s_lock); 433 if (sess->s_refcount < CCBS_FOR_SCSIPI && 434 sess->s_send_window < CCBS_FOR_SCSIPI) { 435 win = window_size(sess, CCBS_FOR_SCSIPI - sess->s_refcount); 436 if (win > sess->s_send_window) { 437 sess->s_send_window++; 438 adapt->adapt_openings++; 439 rc = 0; 440 DEB(5, ("Grow send window to %d\n", sess->s_send_window)); 441 } 442 } 443 mutex_exit(&sess->s_lock); 444 445 return rc; 446 } 447 448 /******************************************************************************/ 449 450 /***************************************************************************** 451 * SCSI interface routines 452 *****************************************************************************/ 453 454 /* 455 * iscsi_scsipi_request: 456 * Perform a request for the SCSIPI layer. 457 */ 458 459 void 460 iscsi_scsipi_request(struct scsipi_channel *chan, scsipi_adapter_req_t req, 461 void *arg) 462 { 463 struct scsipi_adapter *adapt = chan->chan_adapter; 464 struct scsipi_xfer *xs; 465 session_t *sess; 466 int flags; 467 struct scsipi_xfer_mode *xm; 468 int error; 469 470 sess = (session_t *) adapt; /* adapter is first field in session */ 471 472 error = ref_session(sess); 473 474 switch (req) { 475 case ADAPTER_REQ_RUN_XFER: 476 DEB(9, ("ISCSI: scsipi_request RUN_XFER\n")); 477 xs = arg; 478 flags = xs->xs_control; 479 480 if (error) { 481 DEB(9, ("ISCSI: refcount too high: %d, winsize %d\n", 482 sess->s_refcount, sess->s_send_window)); 483 xs->error = XS_BUSY; 484 xs->status = XS_BUSY; 485 scsipi_done(xs); 486 return; 487 } 488 489 if ((flags & XS_CTL_POLL) != 0) { 490 xs->error = XS_DRIVER_STUFFUP; 491 DEBOUT(("Run Xfer request with polling\n")); 492 scsipi_done(xs); 493 break; 494 } 495 /* 496 * NOTE: It appears that XS_CTL_DATA_UIO is not actually used anywhere. 497 * Since it really would complicate matters to handle offsets 498 * into scatter-gather lists, and a number of other drivers don't 499 * handle uio-based data as well, XS_CTL_DATA_UIO isn't 500 * implemented in this driver (at least for now). 501 */ 502 if (flags & XS_CTL_DATA_UIO) { 503 xs->error = XS_DRIVER_STUFFUP; 504 DEBOUT(("Run Xfer with data in UIO\n")); 505 scsipi_done(xs); 506 break; 507 } 508 509 send_run_xfer(sess, xs); 510 DEB(15, ("scsipi_req returns, refcount = %d\n", sess->s_refcount)); 511 return; 512 513 case ADAPTER_REQ_GROW_RESOURCES: 514 DEB(5, ("ISCSI: scsipi_request GROW_RESOURCES\n")); 515 if (grow_resources(sess)) { 516 /* reached maximum */ 517 chan->chan_flags &= ~SCSIPI_CHAN_CANGROW; 518 } 519 break; 520 521 case ADAPTER_REQ_SET_XFER_MODE: 522 DEB(5, ("ISCSI: scsipi_request SET_XFER_MODE\n")); 523 xm = (struct scsipi_xfer_mode *)arg; 524 xm->xm_mode = PERIPH_CAP_TQING; 525 scsipi_async_event(chan, ASYNC_EVENT_XFER_MODE, xm); 526 break; 527 528 default: 529 DEBOUT(("ISCSI: scsipi_request with invalid REQ code %d\n", req)); 530 break; 531 } 532 533 if (!error) 534 unref_session(sess); 535 } 536 537 /* cap the transfer at 64K */ 538 #define ISCSI_MAX_XFER 65536 539 540 /* 541 * iscsi_minphys: 542 * Limit a transfer to our maximum transfer size. 543 */ 544 545 void 546 iscsi_minphys(struct buf *bp) 547 { 548 if (bp->b_bcount > ISCSI_MAX_XFER) { 549 bp->b_bcount = ISCSI_MAX_XFER; 550 } 551 } 552 553 /***************************************************************************** 554 * SCSI job execution helper routines 555 *****************************************************************************/ 556 557 /* 558 * iscsi_done: 559 * 560 * A CCB has completed execution. Pass the status back to the 561 * upper layer. 562 */ 563 void 564 iscsi_done(ccb_t *ccb) 565 { 566 struct scsipi_xfer *xs = ccb->ccb_xs; 567 DEB(9, ("iscsi_done\n")); 568 569 if (xs != NULL) { 570 xs->resid = ccb->ccb_residual; 571 ccb->ccb_xs = NULL; 572 xs->resid = ccb->ccb_residual; 573 574 switch (ccb->ccb_status) { 575 case ISCSI_STATUS_SUCCESS: 576 xs->error = XS_NOERROR; 577 xs->status = SCSI_OK; 578 break; 579 580 case ISCSI_STATUS_CHECK_CONDITION: 581 xs->error = XS_SENSE; 582 xs->status = SCSI_CHECK; 583 break; 584 585 case ISCSI_STATUS_TARGET_BUSY: 586 case ISCSI_STATUS_NO_RESOURCES: 587 DEBC(ccb->ccb_connection, 5, ("target busy, ccb %p\n", ccb)); 588 xs->error = XS_BUSY; 589 xs->status = SCSI_BUSY; 590 break; 591 592 case ISCSI_STATUS_SOCKET_ERROR: 593 case ISCSI_STATUS_TIMEOUT: 594 xs->error = XS_SELTIMEOUT; 595 xs->status = SCSI_BUSY; 596 break; 597 598 case ISCSI_STATUS_QUEUE_FULL: 599 DEBC(ccb->ccb_connection, 5, ("queue full, ccb %p\n", ccb)); 600 xs->error = XS_BUSY; 601 xs->status = SCSI_QUEUE_FULL; 602 break; 603 604 default: 605 xs->error = XS_DRIVER_STUFFUP; 606 break; 607 } 608 609 unref_session(ccb->ccb_session); 610 611 DEB(99, ("Calling scsipi_done (%p), err = %d\n", xs, xs->error)); 612 scsipi_done(xs); 613 DEB(99, ("scsipi_done returned\n")); 614 } else { 615 DEBOUT(("ISCSI: iscsi_done CCB %p without XS\n", ccb)); 616 } 617 } 618 619 SYSCTL_SETUP(sysctl_iscsi_setup, "ISCSI subtree setup") 620 { 621 const struct sysctlnode *node = NULL; 622 623 sysctl_createv(clog, 0, NULL, &node, 624 CTLFLAG_PERMANENT, 625 CTLTYPE_NODE, "iscsi", 626 SYSCTL_DESCR("iscsi controls"), 627 NULL, 0, NULL, 0, 628 CTL_HW, CTL_CREATE, CTL_EOL); 629 sysctl_createv(clog, 0, &node, NULL, 630 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 631 CTLTYPE_BOOL, "hexbignums", 632 SYSCTL_DESCR("encode parameters in hex"), 633 NULL, 0, &iscsi_hex_bignums, 0, 634 CTL_CREATE, CTL_EOL); 635 636 #ifdef ISCSI_DEBUG 637 sysctl_createv(clog, 0, &node, NULL, 638 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 639 CTLTYPE_INT, "debug", 640 SYSCTL_DESCR("debug level"), 641 NULL, 0, &iscsi_debug_level, sizeof(iscsi_debug_level), 642 CTL_CREATE, CTL_EOL); 643 #endif 644 } 645 646 647 /* Kernel Module support */ 648 649 #include <sys/module.h> 650 651 MODULE(MODULE_CLASS_DRIVER, iscsi, NULL); /* Possibly a builtin module */ 652 653 #ifdef _MODULE 654 static const struct cfiattrdata ibescsi_info = { "scsi", 1, 655 {{"channel", "-1", -1},} 656 }; 657 658 static const struct cfiattrdata *const iscsi_attrs[] = { &ibescsi_info, NULL }; 659 660 CFDRIVER_DECL(iscsi, DV_DULL, iscsi_attrs); 661 662 static struct cfdata iscsi_cfdata[] = { 663 { 664 .cf_name = "iscsi", 665 .cf_atname = "iscsi", 666 .cf_unit = 0, /* Only unit 0 is ever used */ 667 .cf_fstate = FSTATE_NOTFOUND, 668 .cf_loc = NULL, 669 .cf_flags = 0, 670 .cf_pspec = NULL, 671 }, 672 { NULL, NULL, 0, 0, NULL, 0, NULL } 673 }; 674 #endif 675 676 static int 677 iscsi_modcmd(modcmd_t cmd, void *arg) 678 { 679 #ifdef _MODULE 680 devmajor_t cmajor = NODEVMAJOR, bmajor = NODEVMAJOR; 681 int error; 682 #endif 683 684 switch (cmd) { 685 case MODULE_CMD_INIT: 686 #ifdef _MODULE 687 error = config_cfdriver_attach(&iscsi_cd); 688 if (error) { 689 return error; 690 } 691 692 error = config_cfattach_attach(iscsi_cd.cd_name, &iscsi_ca); 693 if (error) { 694 config_cfdriver_detach(&iscsi_cd); 695 aprint_error("%s: unable to register cfattach\n", 696 iscsi_cd.cd_name); 697 return error; 698 } 699 700 error = config_cfdata_attach(iscsi_cfdata, 1); 701 if (error) { 702 aprint_error("%s: unable to attach cfdata\n", 703 iscsi_cd.cd_name); 704 config_cfattach_detach(iscsi_cd.cd_name, &iscsi_ca); 705 config_cfdriver_detach(&iscsi_cd); 706 return error; 707 } 708 709 error = devsw_attach(iscsi_cd.cd_name, NULL, &bmajor, 710 &iscsi_cdevsw, &cmajor); 711 if (error) { 712 aprint_error("%s: unable to register devsw\n", 713 iscsi_cd.cd_name); 714 config_cfdata_detach(iscsi_cfdata); 715 config_cfattach_detach(iscsi_cd.cd_name, &iscsi_ca); 716 config_cfdriver_detach(&iscsi_cd); 717 return error; 718 } 719 720 if (config_attach_pseudo(iscsi_cfdata) == NULL) { 721 aprint_error("%s: config_attach_pseudo failed\n", 722 iscsi_cd.cd_name); 723 config_cfattach_detach(iscsi_cd.cd_name, &iscsi_ca); 724 config_cfdriver_detach(&iscsi_cd); 725 return ENXIO; 726 } 727 #endif 728 return 0; 729 break; 730 731 case MODULE_CMD_FINI: 732 #ifdef _MODULE 733 error = config_cfdata_detach(iscsi_cfdata); 734 if (error) 735 return error; 736 737 config_cfattach_detach(iscsi_cd.cd_name, &iscsi_ca); 738 config_cfdriver_detach(&iscsi_cd); 739 devsw_detach(NULL, &iscsi_cdevsw); 740 #endif 741 return 0; 742 break; 743 744 case MODULE_CMD_AUTOUNLOAD: 745 return EBUSY; 746 break; 747 748 default: 749 return ENOTTY; 750 break; 751 } 752 } 753
Indexes created Fri Sep 26 08:10:20 GMT 2025