iscsi_main.c revision 1.37
1 /* $NetBSD: iscsi_main.c,v 1.37 2021/08/07 16:19:12 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_read = fbadop_read, 91 .fo_write = fbadop_write, 92 .fo_ioctl = iscsiioctl, 93 .fo_fcntl = fnullop_fcntl, 94 .fo_poll = fnullop_poll, 95 .fo_stat = fbadop_stat, 96 .fo_close = iscsiclose, 97 .fo_kqfilter = fnullop_kqfilter, 98 .fo_restart = fnullop_restart 99 }; 100 101 struct cdevsw iscsi_cdevsw = { 102 .d_open = iscsiopen, 103 .d_close = noclose, 104 .d_read = noread, 105 .d_write = nowrite, 106 .d_ioctl = noioctl, 107 .d_stop = nostop, 108 .d_tty = notty, 109 .d_poll = nopoll, 110 .d_mmap = nommap, 111 .d_kqfilter = nokqfilter, 112 .d_discard = nodiscard, 113 .d_flag = D_OTHER 114 }; 115 116 /******************************************************************************/ 117 118 STATIC void iscsi_scsipi_request(struct scsipi_channel *, 119 scsipi_adapter_req_t, void *); 120 STATIC void iscsi_minphys(struct buf *); 121 122 /******************************************************************************/ 123 124 /******************************************************************************* 125 * Open and Close device interfaces. We don't really need them, because we don't 126 * have to keep track of device opens and closes from userland. But apps can't 127 * call ioctl without a handle to the device, and the kernel doesn't hand out 128 * handles without an open routine in the driver. So here they are in all their 129 * glory... 130 *******************************************************************************/ 131 132 int 133 iscsiopen(dev_t dev, int flag, int mode, struct lwp *l) 134 { 135 struct iscsifd *d; 136 struct iscsi_softc *sc; 137 struct file *fp; 138 int error, fd, unit; 139 140 unit = minor(dev); 141 142 DEB(99, ("ISCSI Open unit=%d\n",unit)); 143 144 sc = device_lookup_private(&iscsi_cd, unit); 145 if (sc == NULL) 146 return ENXIO; 147 148 if ((error = fd_allocfile(&fp, &fd)) != 0) 149 return error; 150 151 d = kmem_alloc(sizeof(*d), KM_SLEEP); 152 d->fd_dev = sc->dev; 153 d->fd_unit = unit; 154 155 mutex_enter(&sc->lock); 156 if (iscsi_detaching) { 157 mutex_exit(&sc->lock); 158 kmem_free(d, sizeof(*d)); 159 DEB(99, ("ISCSI Open aborting\n")); 160 fd_abort(curproc, fp, fd); 161 return ENXIO; 162 } 163 TAILQ_INSERT_TAIL(&sc->fds, d, fd_link); 164 mutex_exit(&sc->lock); 165 166 return fd_clone(fp, fd, flag, &iscsi_fileops, d); 167 } 168 169 static int 170 iscsiclose(struct file *fp) 171 { 172 struct iscsifd *d = fp->f_iscsi; 173 struct iscsi_softc *sc; 174 175 sc = device_lookup_private(&iscsi_cd, d->fd_unit); 176 if (sc != NULL) { 177 mutex_enter(&sc->lock); 178 TAILQ_REMOVE(&sc->fds, d, fd_link); 179 mutex_exit(&sc->lock); 180 } 181 182 kmem_free(d, sizeof(*d)); 183 fp->f_iscsi = NULL; 184 185 DEB(99, ("ISCSI Close\n")); 186 return 0; 187 } 188 189 /******************************************************************************/ 190 191 /* 192 * The config Match routine. 193 * Not much to do here, either - this is a pseudo-device. 194 */ 195 196 static int 197 iscsi_match(device_t self, cfdata_t cfdata, void *arg) 198 { 199 return 1; 200 } 201 202 /* 203 * iscsiattach: 204 * Only called when statically configured into a kernel 205 */ 206 void 207 iscsiattach(int n) 208 { 209 int err; 210 cfdata_t cf; 211 212 err = config_cfattach_attach(iscsi_cd.cd_name, &iscsi_ca); 213 if (err) { 214 aprint_error("%s: couldn't register cfattach: %d\n", 215 iscsi_cd.cd_name, err); 216 config_cfdriver_detach(&iscsi_cd); 217 return; 218 } 219 220 if (n > 1) 221 aprint_error("%s: only one device supported\n", 222 iscsi_cd.cd_name); 223 224 cf = kmem_alloc(sizeof(struct cfdata), KM_SLEEP); 225 cf->cf_name = iscsi_cd.cd_name; 226 cf->cf_atname = iscsi_cd.cd_name; 227 cf->cf_unit = 0; 228 cf->cf_fstate = FSTATE_NOTFOUND; 229 230 (void)config_attach_pseudo(cf); 231 return; 232 } 233 234 /* 235 * iscsi_attach: 236 * One-time inits go here. Not much for now, probably even less later. 237 */ 238 static void 239 iscsi_attach(device_t parent, device_t self, void *aux) 240 { 241 struct iscsi_softc *sc; 242 243 DEB(1, ("ISCSI: iscsi_attach, parent=%p, self=%p, aux=%p\n", parent, 244 self, aux)); 245 sc = (struct iscsi_softc *) device_private(self); 246 sc->dev = self; 247 248 TAILQ_INIT(&sc->fds); 249 mutex_init(&sc->lock, MUTEX_DEFAULT, IPL_NONE); 250 251 iscsi_detaching = false; 252 iscsi_init_cleanup(); 253 254 if (!pmf_device_register(self, NULL, NULL)) 255 aprint_error_dev(self, "couldn't establish power handler\n"); 256 257 aprint_verbose("%s: attached. major = %d\n", iscsi_cd.cd_name, 258 cdevsw_lookup_major(&iscsi_cdevsw)); 259 } 260 261 /* 262 * iscsi_detach: 263 * Cleanup. 264 */ 265 static int 266 iscsi_detach(device_t self, int flags) 267 { 268 struct iscsi_softc *sc; 269 int error; 270 271 DEB(1, ("ISCSI: detach\n")); 272 sc = (struct iscsi_softc *) device_private(self); 273 274 mutex_enter(&sc->lock); 275 if (!TAILQ_EMPTY(&sc->fds)) { 276 mutex_exit(&sc->lock); 277 return EBUSY; 278 } 279 iscsi_detaching = true; 280 mutex_exit(&sc->lock); 281 282 error = kill_all_sessions(); 283 if (error) 284 return error; 285 286 error = iscsi_destroy_cleanup(); 287 if (error) 288 return error; 289 290 pmf_device_deregister(sc->dev); 291 292 mutex_destroy(&sc->lock); 293 294 return 0; 295 } 296 297 /******************************************************************************/ 298 299 typedef struct quirktab_t { 300 const char *tgt; 301 const char *iqn; 302 uint32_t quirks; 303 } quirktab_t; 304 305 static const quirktab_t quirktab[] = { 306 { "StarWind", "iqn.2008-08.com.starwindsoftware", PQUIRK_ONLYBIG }, 307 { "UNH", "iqn.2002-10.edu.unh.", 308 PQUIRK_NOBIGMODESENSE | 309 PQUIRK_NOMODESENSE | 310 PQUIRK_NOSYNCCACHE }, 311 { "NetBSD", "iqn.1994-04.org.netbsd.", 0 }, 312 { "Unknown", "unknown", 0 }, 313 { NULL, NULL, 0 } 314 }; 315 316 /* loop through the quirktab looking for a match on target name */ 317 static const quirktab_t * 318 getquirks(const char *iqn) 319 { 320 const quirktab_t *qp; 321 size_t iqnlen, quirklen; 322 323 if (iqn == NULL) 324 iqn = "unknown"; 325 iqnlen = strlen(iqn); 326 for (qp = quirktab ; qp->iqn ; qp++) { 327 quirklen = strlen(qp->iqn); 328 if (quirklen > iqnlen) 329 continue; 330 if (memcmp(qp->iqn, iqn, quirklen) == 0) 331 break; 332 } 333 return qp; 334 } 335 336 /******************************************************************************/ 337 338 /* 339 * map_session 340 * This (indirectly) maps the existing LUNs for a target to SCSI devices 341 * by going through config_found to tell any child drivers that there's 342 * a new adapter. 343 * Note that each session is equivalent to a SCSI adapter. 344 * 345 * Parameter: the session pointer 346 * 347 * Returns: 1 on success, 0 on failure 348 * 349 * ToDo: Figuring out how to handle more than one LUN. It appears that 350 * the NetBSD SCSI LUN discovery doesn't use "report LUNs", and instead 351 * goes through the LUNs sequentially, stopping somewhere on the way if it 352 * gets an error. We may have to do some LUN mapping in here if this is 353 * really how things work. 354 */ 355 356 int 357 map_session(session_t *sess, device_t dev) 358 { 359 struct scsipi_adapter *adapt = &sess->s_sc_adapter; 360 struct scsipi_channel *chan = &sess->s_sc_channel; 361 const quirktab_t *tgt; 362 363 mutex_enter(&sess->s_lock); 364 sess->s_send_window = max(2, window_size(sess, CCBS_FOR_SCSIPI)); 365 mutex_exit(&sess->s_lock); 366 367 /* 368 * Fill in the scsipi_adapter. 369 */ 370 adapt->adapt_dev = dev; 371 adapt->adapt_nchannels = 1; 372 adapt->adapt_request = iscsi_scsipi_request; 373 adapt->adapt_minphys = iscsi_minphys; 374 adapt->adapt_openings = sess->s_send_window; 375 adapt->adapt_max_periph = CCBS_FOR_SCSIPI; 376 adapt->adapt_flags = SCSIPI_ADAPT_MPSAFE; 377 378 /* 379 * Fill in the scsipi_channel. 380 */ 381 if ((tgt = getquirks(chan->chan_name)) == NULL) { 382 tgt = getquirks("unknown"); 383 } 384 chan->chan_name = tgt->tgt; 385 chan->chan_defquirks = tgt->quirks; 386 chan->chan_adapter = adapt; 387 chan->chan_bustype = &scsi_bustype; 388 chan->chan_channel = 0; 389 chan->chan_flags = SCSIPI_CHAN_NOSETTLE | SCSIPI_CHAN_CANGROW; 390 chan->chan_ntargets = 1; 391 chan->chan_nluns = 16; 392 chan->chan_id = sess->s_id; 393 394 sess->s_child_dev = config_found(dev, chan, scsiprint, CFARGS_NONE); 395 396 return sess->s_child_dev != NULL; 397 } 398 399 400 /* 401 * unmap_session 402 * This (indirectly) unmaps the existing all LUNs for a target by 403 * telling the config system that the adapter has detached. 404 * 405 * Parameter: the session pointer 406 * 407 * Returns: 1 on success, 0 on failure 408 */ 409 410 int 411 unmap_session(session_t *sess) 412 { 413 device_t dev; 414 int rv = 1; 415 416 if ((dev = sess->s_child_dev) != NULL) { 417 sess->s_child_dev = NULL; 418 if (config_detach(dev, 0)) 419 rv = 0; 420 } 421 422 return rv; 423 } 424 425 /* 426 * grow_resources 427 * Try to grow openings up to current window size 428 */ 429 static int 430 grow_resources(session_t *sess) 431 { 432 struct scsipi_adapter *adapt = &sess->s_sc_adapter; 433 int win; 434 int rc = -1; 435 436 mutex_enter(&sess->s_lock); 437 if (sess->s_refcount < CCBS_FOR_SCSIPI && 438 sess->s_send_window < CCBS_FOR_SCSIPI) { 439 win = window_size(sess, CCBS_FOR_SCSIPI - sess->s_refcount); 440 if (win > sess->s_send_window) { 441 sess->s_send_window++; 442 adapt->adapt_openings++; 443 rc = 0; 444 DEB(5, ("Grow send window to %d\n", sess->s_send_window)); 445 } 446 } 447 mutex_exit(&sess->s_lock); 448 449 return rc; 450 } 451 452 /******************************************************************************/ 453 454 /***************************************************************************** 455 * SCSI interface routines 456 *****************************************************************************/ 457 458 /* 459 * iscsi_scsipi_request: 460 * Perform a request for the SCSIPI layer. 461 */ 462 463 void 464 iscsi_scsipi_request(struct scsipi_channel *chan, scsipi_adapter_req_t req, 465 void *arg) 466 { 467 struct scsipi_adapter *adapt = chan->chan_adapter; 468 struct scsipi_xfer *xs; 469 session_t *sess; 470 int flags; 471 struct scsipi_xfer_mode *xm; 472 int error; 473 474 sess = (session_t *) adapt; /* adapter is first field in session */ 475 476 error = ref_session(sess); 477 478 switch (req) { 479 case ADAPTER_REQ_RUN_XFER: 480 DEB(9, ("ISCSI: scsipi_request RUN_XFER\n")); 481 xs = arg; 482 flags = xs->xs_control; 483 484 if (error) { 485 DEB(9, ("ISCSI: refcount too high: %d, winsize %d\n", 486 sess->s_refcount, sess->s_send_window)); 487 xs->error = XS_BUSY; 488 xs->status = XS_BUSY; 489 scsipi_done(xs); 490 return; 491 } 492 493 if ((flags & XS_CTL_POLL) != 0) { 494 xs->error = XS_DRIVER_STUFFUP; 495 DEBOUT(("Run Xfer request with polling\n")); 496 scsipi_done(xs); 497 break; 498 } 499 /* 500 * NOTE: It appears that XS_CTL_DATA_UIO is not actually used anywhere. 501 * Since it really would complicate matters to handle offsets 502 * into scatter-gather lists, and a number of other drivers don't 503 * handle uio-based data as well, XS_CTL_DATA_UIO isn't 504 * implemented in this driver (at least for now). 505 */ 506 if (flags & XS_CTL_DATA_UIO) { 507 xs->error = XS_DRIVER_STUFFUP; 508 DEBOUT(("Run Xfer with data in UIO\n")); 509 scsipi_done(xs); 510 break; 511 } 512 513 send_run_xfer(sess, xs); 514 DEB(15, ("scsipi_req returns, refcount = %d\n", sess->s_refcount)); 515 return; 516 517 case ADAPTER_REQ_GROW_RESOURCES: 518 DEB(5, ("ISCSI: scsipi_request GROW_RESOURCES\n")); 519 if (grow_resources(sess)) { 520 /* reached maximum */ 521 chan->chan_flags &= ~SCSIPI_CHAN_CANGROW; 522 } 523 break; 524 525 case ADAPTER_REQ_SET_XFER_MODE: 526 DEB(5, ("ISCSI: scsipi_request SET_XFER_MODE\n")); 527 xm = (struct scsipi_xfer_mode *)arg; 528 xm->xm_mode = PERIPH_CAP_TQING; 529 scsipi_async_event(chan, ASYNC_EVENT_XFER_MODE, xm); 530 break; 531 532 default: 533 DEBOUT(("ISCSI: scsipi_request with invalid REQ code %d\n", req)); 534 break; 535 } 536 537 if (!error) 538 unref_session(sess); 539 } 540 541 /* cap the transfer at 64K */ 542 #define ISCSI_MAX_XFER 65536 543 544 /* 545 * iscsi_minphys: 546 * Limit a transfer to our maximum transfer size. 547 */ 548 549 void 550 iscsi_minphys(struct buf *bp) 551 { 552 if (bp->b_bcount > ISCSI_MAX_XFER) { 553 bp->b_bcount = ISCSI_MAX_XFER; 554 } 555 } 556 557 /***************************************************************************** 558 * SCSI job execution helper routines 559 *****************************************************************************/ 560 561 /* 562 * iscsi_done: 563 * 564 * A CCB has completed execution. Pass the status back to the 565 * upper layer. 566 */ 567 void 568 iscsi_done(ccb_t *ccb) 569 { 570 struct scsipi_xfer *xs = ccb->ccb_xs; 571 DEB(9, ("iscsi_done\n")); 572 573 if (xs != NULL) { 574 xs->resid = ccb->ccb_residual; 575 ccb->ccb_xs = NULL; 576 xs->resid = ccb->ccb_residual; 577 578 switch (ccb->ccb_status) { 579 case ISCSI_STATUS_SUCCESS: 580 xs->error = XS_NOERROR; 581 xs->status = SCSI_OK; 582 break; 583 584 case ISCSI_STATUS_CHECK_CONDITION: 585 xs->error = XS_SENSE; 586 xs->status = SCSI_CHECK; 587 break; 588 589 case ISCSI_STATUS_TARGET_BUSY: 590 case ISCSI_STATUS_NO_RESOURCES: 591 DEBC(ccb->ccb_connection, 5, ("target busy, ccb %p\n", ccb)); 592 xs->error = XS_BUSY; 593 xs->status = SCSI_BUSY; 594 break; 595 596 case ISCSI_STATUS_SOCKET_ERROR: 597 case ISCSI_STATUS_TIMEOUT: 598 xs->error = XS_SELTIMEOUT; 599 xs->status = SCSI_BUSY; 600 break; 601 602 case ISCSI_STATUS_QUEUE_FULL: 603 DEBC(ccb->ccb_connection, 5, ("queue full, ccb %p\n", ccb)); 604 xs->error = XS_BUSY; 605 xs->status = SCSI_QUEUE_FULL; 606 break; 607 608 default: 609 xs->error = XS_DRIVER_STUFFUP; 610 break; 611 } 612 613 unref_session(ccb->ccb_session); 614 615 DEB(99, ("Calling scsipi_done (%p), err = %d\n", xs, xs->error)); 616 scsipi_done(xs); 617 DEB(99, ("scsipi_done returned\n")); 618 } else { 619 DEBOUT(("ISCSI: iscsi_done CCB %p without XS\n", ccb)); 620 } 621 } 622 623 SYSCTL_SETUP(sysctl_iscsi_setup, "ISCSI subtree setup") 624 { 625 const struct sysctlnode *node = NULL; 626 627 sysctl_createv(clog, 0, NULL, &node, 628 CTLFLAG_PERMANENT, 629 CTLTYPE_NODE, "iscsi", 630 SYSCTL_DESCR("iscsi controls"), 631 NULL, 0, NULL, 0, 632 CTL_HW, CTL_CREATE, CTL_EOL); 633 sysctl_createv(clog, 0, &node, NULL, 634 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 635 CTLTYPE_BOOL, "hexbignums", 636 SYSCTL_DESCR("encode parameters in hex"), 637 NULL, 0, &iscsi_hex_bignums, 0, 638 CTL_CREATE, CTL_EOL); 639 640 #ifdef ISCSI_DEBUG 641 sysctl_createv(clog, 0, &node, NULL, 642 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 643 CTLTYPE_INT, "debug", 644 SYSCTL_DESCR("debug level"), 645 NULL, 0, &iscsi_debug_level, sizeof(iscsi_debug_level), 646 CTL_CREATE, CTL_EOL); 647 #endif 648 } 649 650 651 /* Kernel Module support */ 652 653 #include <sys/module.h> 654 655 MODULE(MODULE_CLASS_DRIVER, iscsi, NULL); /* Possibly a builtin module */ 656 657 #ifdef _MODULE 658 static const struct cfiattrdata ibescsi_info = { "scsi", 1, 659 {{"channel", "-1", -1},} 660 }; 661 662 static const struct cfiattrdata *const iscsi_attrs[] = { &ibescsi_info, NULL }; 663 664 CFDRIVER_DECL(iscsi, DV_DULL, iscsi_attrs); 665 666 static struct cfdata iscsi_cfdata[] = { 667 { 668 .cf_name = "iscsi", 669 .cf_atname = "iscsi", 670 .cf_unit = 0, /* Only unit 0 is ever used */ 671 .cf_fstate = FSTATE_NOTFOUND, 672 .cf_loc = NULL, 673 .cf_flags = 0, 674 .cf_pspec = NULL, 675 }, 676 { NULL, NULL, 0, 0, NULL, 0, NULL } 677 }; 678 #endif 679 680 static int 681 iscsi_modcmd(modcmd_t cmd, void *arg) 682 { 683 #ifdef _MODULE 684 devmajor_t cmajor = NODEVMAJOR, bmajor = NODEVMAJOR; 685 int error; 686 #endif 687 688 switch (cmd) { 689 case MODULE_CMD_INIT: 690 #ifdef _MODULE 691 error = config_cfdriver_attach(&iscsi_cd); 692 if (error) { 693 return error; 694 } 695 696 error = config_cfattach_attach(iscsi_cd.cd_name, &iscsi_ca); 697 if (error) { 698 config_cfdriver_detach(&iscsi_cd); 699 aprint_error("%s: unable to register cfattach\n", 700 iscsi_cd.cd_name); 701 return error; 702 } 703 704 error = config_cfdata_attach(iscsi_cfdata, 1); 705 if (error) { 706 aprint_error("%s: unable to attach cfdata\n", 707 iscsi_cd.cd_name); 708 config_cfattach_detach(iscsi_cd.cd_name, &iscsi_ca); 709 config_cfdriver_detach(&iscsi_cd); 710 return error; 711 } 712 713 error = devsw_attach(iscsi_cd.cd_name, NULL, &bmajor, 714 &iscsi_cdevsw, &cmajor); 715 if (error) { 716 aprint_error("%s: unable to register devsw\n", 717 iscsi_cd.cd_name); 718 config_cfdata_detach(iscsi_cfdata); 719 config_cfattach_detach(iscsi_cd.cd_name, &iscsi_ca); 720 config_cfdriver_detach(&iscsi_cd); 721 return error; 722 } 723 724 if (config_attach_pseudo(iscsi_cfdata) == NULL) { 725 aprint_error("%s: config_attach_pseudo failed\n", 726 iscsi_cd.cd_name); 727 config_cfattach_detach(iscsi_cd.cd_name, &iscsi_ca); 728 config_cfdriver_detach(&iscsi_cd); 729 return ENXIO; 730 } 731 #endif 732 return 0; 733 break; 734 735 case MODULE_CMD_FINI: 736 #ifdef _MODULE 737 error = config_cfdata_detach(iscsi_cfdata); 738 if (error) 739 return error; 740 741 config_cfattach_detach(iscsi_cd.cd_name, &iscsi_ca); 742 config_cfdriver_detach(&iscsi_cd); 743 devsw_detach(NULL, &iscsi_cdevsw); 744 #endif 745 return 0; 746 break; 747 748 case MODULE_CMD_AUTOUNLOAD: 749 return EBUSY; 750 break; 751 752 default: 753 return ENOTTY; 754 break; 755 } 756 } 757
Indexes created Mon Sep 22 13:09:51 GMT 2025