Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/cam/scsi/scsi_pass.c
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1 /*- 2 * Copyright (c) 1997, 1998, 2000 Justin T. Gibbs. 3 * Copyright (c) 1997, 1998, 1999 Kenneth D. Merry. 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions, and the following disclaimer, 11 * without modification, immediately at the beginning of the file. 12 * 2. The name of the author may not be used to endorse or promote products 13 * derived from this software without specific prior written permission. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR 19 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28 #include <sys/cdefs.h> 29 __FBSDID("$FreeBSD: releng/10.0/sys/cam/scsi/scsi_pass.c 257049 2013-10-24 10:33:31Z mav $"); 30 31 #include <sys/param.h> 32 #include <sys/systm.h> 33 #include <sys/kernel.h> 34 #include <sys/types.h> 35 #include <sys/bio.h> 36 #include <sys/malloc.h> 37 #include <sys/fcntl.h> 38 #include <sys/conf.h> 39 #include <sys/errno.h> 40 #include <sys/devicestat.h> 41 #include <sys/proc.h> 42 #include <sys/taskqueue.h> 43 44 #include <cam/cam.h> 45 #include <cam/cam_ccb.h> 46 #include <cam/cam_periph.h> 47 #include <cam/cam_queue.h> 48 #include <cam/cam_xpt_periph.h> 49 #include <cam/cam_debug.h> 50 #include <cam/cam_sim.h> 51 #include <cam/cam_compat.h> 52 53 #include <cam/scsi/scsi_all.h> 54 #include <cam/scsi/scsi_pass.h> 55 56 typedef enum { 57 PASS_FLAG_OPEN = 0x01, 58 PASS_FLAG_LOCKED = 0x02, 59 PASS_FLAG_INVALID = 0x04, 60 PASS_FLAG_INITIAL_PHYSPATH = 0x08 61 } pass_flags; 62 63 typedef enum { 64 PASS_STATE_NORMAL 65 } pass_state; 66 67 typedef enum { 68 PASS_CCB_BUFFER_IO, 69 PASS_CCB_WAITING 70 } pass_ccb_types; 71 72 #define ccb_type ppriv_field0 73 #define ccb_bp ppriv_ptr1 74 75 struct pass_softc { 76 pass_state state; 77 pass_flags flags; 78 u_int8_t pd_type; 79 union ccb saved_ccb; 80 int open_count; 81 struct devstat *device_stats; 82 struct cdev *dev; 83 struct cdev *alias_dev; 84 struct task add_physpath_task; 85 }; 86 87 88 static d_open_t passopen; 89 static d_close_t passclose; 90 static d_ioctl_t passioctl; 91 static d_ioctl_t passdoioctl; 92 93 static periph_init_t passinit; 94 static periph_ctor_t passregister; 95 static periph_oninv_t passoninvalidate; 96 static periph_dtor_t passcleanup; 97 static periph_start_t passstart; 98 static void pass_add_physpath(void *context, int pending); 99 static void passasync(void *callback_arg, u_int32_t code, 100 struct cam_path *path, void *arg); 101 static void passdone(struct cam_periph *periph, 102 union ccb *done_ccb); 103 static int passerror(union ccb *ccb, u_int32_t cam_flags, 104 u_int32_t sense_flags); 105 static int passsendccb(struct cam_periph *periph, union ccb *ccb, 106 union ccb *inccb); 107 108 static struct periph_driver passdriver = 109 { 110 passinit, "pass", 111 TAILQ_HEAD_INITIALIZER(passdriver.units), /* generation */ 0 112 }; 113 114 PERIPHDRIVER_DECLARE(pass, passdriver); 115 116 static struct cdevsw pass_cdevsw = { 117 .d_version = D_VERSION, 118 .d_flags = D_TRACKCLOSE, 119 .d_open = passopen, 120 .d_close = passclose, 121 .d_ioctl = passioctl, 122 .d_name = "pass", 123 }; 124 125 static void 126 passinit(void) 127 { 128 cam_status status; 129 130 /* 131 * Install a global async callback. This callback will 132 * receive async callbacks like "new device found". 133 */ 134 status = xpt_register_async(AC_FOUND_DEVICE, passasync, NULL, NULL); 135 136 if (status != CAM_REQ_CMP) { 137 printf("pass: Failed to attach master async callback " 138 "due to status 0x%x!\n", status); 139 } 140 141 } 142 143 static void 144 passdevgonecb(void *arg) 145 { 146 struct cam_sim *sim; 147 struct cam_periph *periph; 148 struct pass_softc *softc; 149 int i; 150 151 periph = (struct cam_periph *)arg; 152 sim = periph->sim; 153 softc = (struct pass_softc *)periph->softc; 154 155 KASSERT(softc->open_count >= 0, ("Negative open count %d", 156 softc->open_count)); 157 158 mtx_lock(sim->mtx); 159 160 /* 161 * When we get this callback, we will get no more close calls from 162 * devfs. So if we have any dangling opens, we need to release the 163 * reference held for that particular context. 164 */ 165 for (i = 0; i < softc->open_count; i++) 166 cam_periph_release_locked(periph); 167 168 softc->open_count = 0; 169 170 /* 171 * Release the reference held for the device node, it is gone now. 172 */ 173 cam_periph_release_locked(periph); 174 175 /* 176 * We reference the SIM lock directly here, instead of using 177 * cam_periph_unlock(). The reason is that the final call to 178 * cam_periph_release_locked() above could result in the periph 179 * getting freed. If that is the case, dereferencing the periph 180 * with a cam_periph_unlock() call would cause a page fault. 181 */ 182 mtx_unlock(sim->mtx); 183 } 184 185 static void 186 passoninvalidate(struct cam_periph *periph) 187 { 188 struct pass_softc *softc; 189 190 softc = (struct pass_softc *)periph->softc; 191 192 /* 193 * De-register any async callbacks. 194 */ 195 xpt_register_async(0, passasync, periph, periph->path); 196 197 softc->flags |= PASS_FLAG_INVALID; 198 199 /* 200 * Tell devfs this device has gone away, and ask for a callback 201 * when it has cleaned up its state. 202 */ 203 destroy_dev_sched_cb(softc->dev, passdevgonecb, periph); 204 205 /* 206 * XXX Return all queued I/O with ENXIO. 207 * XXX Handle any transactions queued to the card 208 * with XPT_ABORT_CCB. 209 */ 210 } 211 212 static void 213 passcleanup(struct cam_periph *periph) 214 { 215 struct pass_softc *softc; 216 217 softc = (struct pass_softc *)periph->softc; 218 219 devstat_remove_entry(softc->device_stats); 220 221 cam_periph_unlock(periph); 222 taskqueue_drain(taskqueue_thread, &softc->add_physpath_task); 223 224 cam_periph_lock(periph); 225 226 free(softc, M_DEVBUF); 227 } 228 229 static void 230 pass_add_physpath(void *context, int pending) 231 { 232 struct cam_periph *periph; 233 struct pass_softc *softc; 234 char *physpath; 235 236 /* 237 * If we have one, create a devfs alias for our 238 * physical path. 239 */ 240 periph = context; 241 softc = periph->softc; 242 physpath = malloc(MAXPATHLEN, M_DEVBUF, M_WAITOK); 243 cam_periph_lock(periph); 244 if (periph->flags & CAM_PERIPH_INVALID) { 245 cam_periph_unlock(periph); 246 goto out; 247 } 248 if (xpt_getattr(physpath, MAXPATHLEN, 249 "GEOM::physpath", periph->path) == 0 250 && strlen(physpath) != 0) { 251 252 cam_periph_unlock(periph); 253 make_dev_physpath_alias(MAKEDEV_WAITOK, &softc->alias_dev, 254 softc->dev, softc->alias_dev, physpath); 255 cam_periph_lock(periph); 256 } 257 258 /* 259 * Now that we've made our alias, we no longer have to have a 260 * reference to the device. 261 */ 262 if ((softc->flags & PASS_FLAG_INITIAL_PHYSPATH) == 0) { 263 softc->flags |= PASS_FLAG_INITIAL_PHYSPATH; 264 cam_periph_unlock(periph); 265 dev_rel(softc->dev); 266 } 267 else 268 cam_periph_unlock(periph); 269 270 out: 271 free(physpath, M_DEVBUF); 272 } 273 274 static void 275 passasync(void *callback_arg, u_int32_t code, 276 struct cam_path *path, void *arg) 277 { 278 struct cam_periph *periph; 279 280 periph = (struct cam_periph *)callback_arg; 281 282 switch (code) { 283 case AC_FOUND_DEVICE: 284 { 285 struct ccb_getdev *cgd; 286 cam_status status; 287 288 cgd = (struct ccb_getdev *)arg; 289 if (cgd == NULL) 290 break; 291 292 /* 293 * Allocate a peripheral instance for 294 * this device and start the probe 295 * process. 296 */ 297 status = cam_periph_alloc(passregister, passoninvalidate, 298 passcleanup, passstart, "pass", 299 CAM_PERIPH_BIO, cgd->ccb_h.path, 300 passasync, AC_FOUND_DEVICE, cgd); 301 302 if (status != CAM_REQ_CMP 303 && status != CAM_REQ_INPROG) { 304 const struct cam_status_entry *entry; 305 306 entry = cam_fetch_status_entry(status); 307 308 printf("passasync: Unable to attach new device " 309 "due to status %#x: %s\n", status, entry ? 310 entry->status_text : "Unknown"); 311 } 312 313 break; 314 } 315 case AC_ADVINFO_CHANGED: 316 { 317 uintptr_t buftype; 318 319 buftype = (uintptr_t)arg; 320 if (buftype == CDAI_TYPE_PHYS_PATH) { 321 struct pass_softc *softc; 322 323 softc = (struct pass_softc *)periph->softc; 324 taskqueue_enqueue(taskqueue_thread, 325 &softc->add_physpath_task); 326 } 327 break; 328 } 329 default: 330 cam_periph_async(periph, code, path, arg); 331 break; 332 } 333 } 334 335 static cam_status 336 passregister(struct cam_periph *periph, void *arg) 337 { 338 struct pass_softc *softc; 339 struct ccb_getdev *cgd; 340 struct ccb_pathinq cpi; 341 int no_tags; 342 343 cgd = (struct ccb_getdev *)arg; 344 if (cgd == NULL) { 345 printf("%s: no getdev CCB, can't register device\n", __func__); 346 return(CAM_REQ_CMP_ERR); 347 } 348 349 softc = (struct pass_softc *)malloc(sizeof(*softc), 350 M_DEVBUF, M_NOWAIT); 351 352 if (softc == NULL) { 353 printf("%s: Unable to probe new device. " 354 "Unable to allocate softc\n", __func__); 355 return(CAM_REQ_CMP_ERR); 356 } 357 358 bzero(softc, sizeof(*softc)); 359 softc->state = PASS_STATE_NORMAL; 360 if (cgd->protocol == PROTO_SCSI || cgd->protocol == PROTO_ATAPI) 361 softc->pd_type = SID_TYPE(&cgd->inq_data); 362 else if (cgd->protocol == PROTO_SATAPM) 363 softc->pd_type = T_ENCLOSURE; 364 else 365 softc->pd_type = T_DIRECT; 366 367 periph->softc = softc; 368 369 bzero(&cpi, sizeof(cpi)); 370 xpt_setup_ccb(&cpi.ccb_h, periph->path, CAM_PRIORITY_NORMAL); 371 cpi.ccb_h.func_code = XPT_PATH_INQ; 372 xpt_action((union ccb *)&cpi); 373 374 /* 375 * We pass in 0 for a blocksize, since we don't 376 * know what the blocksize of this device is, if 377 * it even has a blocksize. 378 */ 379 cam_periph_unlock(periph); 380 no_tags = (cgd->inq_data.flags & SID_CmdQue) == 0; 381 softc->device_stats = devstat_new_entry("pass", 382 periph->unit_number, 0, 383 DEVSTAT_NO_BLOCKSIZE 384 | (no_tags ? DEVSTAT_NO_ORDERED_TAGS : 0), 385 softc->pd_type | 386 XPORT_DEVSTAT_TYPE(cpi.transport) | 387 DEVSTAT_TYPE_PASS, 388 DEVSTAT_PRIORITY_PASS); 389 390 /* 391 * Acquire a reference to the periph before we create the devfs 392 * instance for it. We'll release this reference once the devfs 393 * instance has been freed. 394 */ 395 if (cam_periph_acquire(periph) != CAM_REQ_CMP) { 396 xpt_print(periph->path, "%s: lost periph during " 397 "registration!\n", __func__); 398 cam_periph_lock(periph); 399 return (CAM_REQ_CMP_ERR); 400 } 401 402 /* Register the device */ 403 softc->dev = make_dev(&pass_cdevsw, periph->unit_number, 404 UID_ROOT, GID_OPERATOR, 0600, "%s%d", 405 periph->periph_name, periph->unit_number); 406 407 /* 408 * Now that we have made the devfs instance, hold a reference to it 409 * until the task queue has run to setup the physical path alias. 410 * That way devfs won't get rid of the device before we add our 411 * alias. 412 */ 413 dev_ref(softc->dev); 414 415 cam_periph_lock(periph); 416 softc->dev->si_drv1 = periph; 417 418 TASK_INIT(&softc->add_physpath_task, /*priority*/0, 419 pass_add_physpath, periph); 420 421 /* 422 * See if physical path information is already available. 423 */ 424 taskqueue_enqueue(taskqueue_thread, &softc->add_physpath_task); 425 426 /* 427 * Add an async callback so that we get notified if 428 * this device goes away or its physical path 429 * (stored in the advanced info data of the EDT) has 430 * changed. 431 */ 432 xpt_register_async(AC_LOST_DEVICE | AC_ADVINFO_CHANGED, 433 passasync, periph, periph->path); 434 435 if (bootverbose) 436 xpt_announce_periph(periph, NULL); 437 438 return(CAM_REQ_CMP); 439 } 440 441 static int 442 passopen(struct cdev *dev, int flags, int fmt, struct thread *td) 443 { 444 struct cam_periph *periph; 445 struct pass_softc *softc; 446 int error; 447 448 periph = (struct cam_periph *)dev->si_drv1; 449 if (cam_periph_acquire(periph) != CAM_REQ_CMP) 450 return (ENXIO); 451 452 cam_periph_lock(periph); 453 454 softc = (struct pass_softc *)periph->softc; 455 456 if (softc->flags & PASS_FLAG_INVALID) { 457 cam_periph_release_locked(periph); 458 cam_periph_unlock(periph); 459 return(ENXIO); 460 } 461 462 /* 463 * Don't allow access when we're running at a high securelevel. 464 */ 465 error = securelevel_gt(td->td_ucred, 1); 466 if (error) { 467 cam_periph_release_locked(periph); 468 cam_periph_unlock(periph); 469 return(error); 470 } 471 472 /* 473 * Only allow read-write access. 474 */ 475 if (((flags & FWRITE) == 0) || ((flags & FREAD) == 0)) { 476 cam_periph_release_locked(periph); 477 cam_periph_unlock(periph); 478 return(EPERM); 479 } 480 481 /* 482 * We don't allow nonblocking access. 483 */ 484 if ((flags & O_NONBLOCK) != 0) { 485 xpt_print(periph->path, "can't do nonblocking access\n"); 486 cam_periph_release_locked(periph); 487 cam_periph_unlock(periph); 488 return(EINVAL); 489 } 490 491 softc->open_count++; 492 493 cam_periph_unlock(periph); 494 495 return (error); 496 } 497 498 static int 499 passclose(struct cdev *dev, int flag, int fmt, struct thread *td) 500 { 501 struct cam_sim *sim; 502 struct cam_periph *periph; 503 struct pass_softc *softc; 504 505 periph = (struct cam_periph *)dev->si_drv1; 506 if (periph == NULL) 507 return (ENXIO); 508 509 sim = periph->sim; 510 softc = periph->softc; 511 512 mtx_lock(sim->mtx); 513 514 softc->open_count--; 515 516 cam_periph_release_locked(periph); 517 518 /* 519 * We reference the SIM lock directly here, instead of using 520 * cam_periph_unlock(). The reason is that the call to 521 * cam_periph_release_locked() above could result in the periph 522 * getting freed. If that is the case, dereferencing the periph 523 * with a cam_periph_unlock() call would cause a page fault. 524 * 525 * cam_periph_release() avoids this problem using the same method, 526 * but we're manually acquiring and dropping the lock here to 527 * protect the open count and avoid another lock acquisition and 528 * release. 529 */ 530 mtx_unlock(sim->mtx); 531 532 return (0); 533 } 534 535 static void 536 passstart(struct cam_periph *periph, union ccb *start_ccb) 537 { 538 struct pass_softc *softc; 539 540 softc = (struct pass_softc *)periph->softc; 541 542 switch (softc->state) { 543 case PASS_STATE_NORMAL: 544 start_ccb->ccb_h.ccb_type = PASS_CCB_WAITING; 545 SLIST_INSERT_HEAD(&periph->ccb_list, &start_ccb->ccb_h, 546 periph_links.sle); 547 periph->immediate_priority = CAM_PRIORITY_NONE; 548 wakeup(&periph->ccb_list); 549 break; 550 } 551 } 552 553 static void 554 passdone(struct cam_periph *periph, union ccb *done_ccb) 555 { 556 struct pass_softc *softc; 557 struct ccb_scsiio *csio; 558 559 softc = (struct pass_softc *)periph->softc; 560 csio = &done_ccb->csio; 561 switch (csio->ccb_h.ccb_type) { 562 case PASS_CCB_WAITING: 563 /* Caller will release the CCB */ 564 wakeup(&done_ccb->ccb_h.cbfcnp); 565 return; 566 } 567 xpt_release_ccb(done_ccb); 568 } 569 570 static int 571 passioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td) 572 { 573 int error; 574 575 if ((error = passdoioctl(dev, cmd, addr, flag, td)) == ENOTTY) { 576 error = cam_compat_ioctl(dev, cmd, addr, flag, td, passdoioctl); 577 } 578 return (error); 579 } 580 581 static int 582 passdoioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td) 583 { 584 struct cam_periph *periph; 585 struct pass_softc *softc; 586 int error; 587 uint32_t priority; 588 589 periph = (struct cam_periph *)dev->si_drv1; 590 if (periph == NULL) 591 return(ENXIO); 592 593 cam_periph_lock(periph); 594 softc = (struct pass_softc *)periph->softc; 595 596 error = 0; 597 598 switch (cmd) { 599 600 case CAMIOCOMMAND: 601 { 602 union ccb *inccb; 603 union ccb *ccb; 604 int ccb_malloced; 605 606 inccb = (union ccb *)addr; 607 608 /* 609 * Some CCB types, like scan bus and scan lun can only go 610 * through the transport layer device. 611 */ 612 if (inccb->ccb_h.func_code & XPT_FC_XPT_ONLY) { 613 xpt_print(periph->path, "CCB function code %#x is " 614 "restricted to the XPT device\n", 615 inccb->ccb_h.func_code); 616 error = ENODEV; 617 break; 618 } 619 620 /* Compatibility for RL/priority-unaware code. */ 621 priority = inccb->ccb_h.pinfo.priority; 622 if (priority <= CAM_PRIORITY_OOB) 623 priority += CAM_PRIORITY_OOB + 1; 624 625 /* 626 * Non-immediate CCBs need a CCB from the per-device pool 627 * of CCBs, which is scheduled by the transport layer. 628 * Immediate CCBs and user-supplied CCBs should just be 629 * malloced. 630 */ 631 if ((inccb->ccb_h.func_code & XPT_FC_QUEUED) 632 && ((inccb->ccb_h.func_code & XPT_FC_USER_CCB) == 0)) { 633 ccb = cam_periph_getccb(periph, priority); 634 ccb_malloced = 0; 635 } else { 636 ccb = xpt_alloc_ccb_nowait(); 637 638 if (ccb != NULL) 639 xpt_setup_ccb(&ccb->ccb_h, periph->path, 640 priority); 641 ccb_malloced = 1; 642 } 643 644 if (ccb == NULL) { 645 xpt_print(periph->path, "unable to allocate CCB\n"); 646 error = ENOMEM; 647 break; 648 } 649 650 error = passsendccb(periph, ccb, inccb); 651 652 if (ccb_malloced) 653 xpt_free_ccb(ccb); 654 else 655 xpt_release_ccb(ccb); 656 657 break; 658 } 659 default: 660 error = cam_periph_ioctl(periph, cmd, addr, passerror); 661 break; 662 } 663 664 cam_periph_unlock(periph); 665 return(error); 666 } 667 668 /* 669 * Generally, "ccb" should be the CCB supplied by the kernel. "inccb" 670 * should be the CCB that is copied in from the user. 671 */ 672 static int 673 passsendccb(struct cam_periph *periph, union ccb *ccb, union ccb *inccb) 674 { 675 struct pass_softc *softc; 676 struct cam_periph_map_info mapinfo; 677 xpt_opcode fc; 678 int error; 679 680 softc = (struct pass_softc *)periph->softc; 681 682 /* 683 * There are some fields in the CCB header that need to be 684 * preserved, the rest we get from the user. 685 */ 686 xpt_merge_ccb(ccb, inccb); 687 688 /* 689 * There's no way for the user to have a completion 690 * function, so we put our own completion function in here. 691 */ 692 ccb->ccb_h.cbfcnp = passdone; 693 694 /* 695 * Let cam_periph_mapmem do a sanity check on the data pointer format. 696 * Even if no data transfer is needed, it's a cheap check and it 697 * simplifies the code. 698 */ 699 fc = ccb->ccb_h.func_code; 700 if ((fc == XPT_SCSI_IO) || (fc == XPT_ATA_IO) || (fc == XPT_SMP_IO) 701 || (fc == XPT_DEV_MATCH) || (fc == XPT_DEV_ADVINFO)) { 702 bzero(&mapinfo, sizeof(mapinfo)); 703 704 /* 705 * cam_periph_mapmem calls into proc and vm functions that can 706 * sleep as well as trigger I/O, so we can't hold the lock. 707 * Dropping it here is reasonably safe. 708 */ 709 cam_periph_unlock(periph); 710 error = cam_periph_mapmem(ccb, &mapinfo); 711 cam_periph_lock(periph); 712 713 /* 714 * cam_periph_mapmem returned an error, we can't continue. 715 * Return the error to the user. 716 */ 717 if (error) 718 return(error); 719 } else 720 /* Ensure that the unmap call later on is a no-op. */ 721 mapinfo.num_bufs_used = 0; 722 723 /* 724 * If the user wants us to perform any error recovery, then honor 725 * that request. Otherwise, it's up to the user to perform any 726 * error recovery. 727 */ 728 cam_periph_runccb(ccb, passerror, /* cam_flags */ CAM_RETRY_SELTO, 729 /* sense_flags */ ((ccb->ccb_h.flags & CAM_PASS_ERR_RECOVER) ? 730 SF_RETRY_UA : SF_NO_RECOVERY) | SF_NO_PRINT, 731 softc->device_stats); 732 733 cam_periph_unmapmem(ccb, &mapinfo); 734 735 ccb->ccb_h.cbfcnp = NULL; 736 ccb->ccb_h.periph_priv = inccb->ccb_h.periph_priv; 737 bcopy(ccb, inccb, sizeof(union ccb)); 738 739 return(0); 740 } 741 742 static int 743 passerror(union ccb *ccb, u_int32_t cam_flags, u_int32_t sense_flags) 744 { 745 struct cam_periph *periph; 746 struct pass_softc *softc; 747 748 periph = xpt_path_periph(ccb->ccb_h.path); 749 softc = (struct pass_softc *)periph->softc; 750 751 return(cam_periph_error(ccb, cam_flags, sense_flags, 752 &softc->saved_ccb)); 753 }
Cache object: dc99cf558023e8b90f269ba10ee15361
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