kern_conf.c revision 149144
1/*- 2 * Copyright (c) 1999-2002 Poul-Henning Kamp 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27#include <sys/cdefs.h> 28__FBSDID("$FreeBSD: head/sys/kern/kern_conf.c 149144 2005-08-16 19:08:01Z phk $"); 29 30#include <sys/param.h> 31#include <sys/kernel.h> 32#include <sys/systm.h> 33#include <sys/bio.h> 34#include <sys/lock.h> 35#include <sys/mutex.h> 36#include <sys/sysctl.h> 37#include <sys/module.h> 38#include <sys/malloc.h> 39#include <sys/conf.h> 40#include <sys/vnode.h> 41#include <sys/queue.h> 42#include <sys/poll.h> 43#include <sys/ctype.h> 44#include <sys/tty.h> 45#include <sys/ucred.h> 46#include <machine/stdarg.h> 47 48#include <fs/devfs/devfs_int.h> 49 50static MALLOC_DEFINE(M_DEVT, "cdev", "cdev storage"); 51 52/* Built at compile time from sys/conf/majors */ 53 54static struct mtx devmtx; 55static void freedev(struct cdev *dev); 56static void destroy_devl(struct cdev *dev); 57static struct cdev *make_dev_credv(struct cdevsw *devsw, int minornr, 58 struct ucred *cr, uid_t uid, gid_t gid, int mode, const char *fmt, 59 va_list ap); 60 61void 62dev_lock(void) 63{ 64 if (!mtx_initialized(&devmtx)) 65 mtx_init(&devmtx, "cdev", NULL, MTX_DEF); 66 mtx_lock(&devmtx); 67} 68 69void 70dev_unlock(void) 71{ 72 73 mtx_unlock(&devmtx); 74} 75 76void 77dev_ref(struct cdev *dev) 78{ 79 80 mtx_assert(&devmtx, MA_NOTOWNED); 81 mtx_lock(&devmtx); 82 dev->si_refcount++; 83 mtx_unlock(&devmtx); 84} 85 86void 87dev_refl(struct cdev *dev) 88{ 89 90 mtx_assert(&devmtx, MA_OWNED); 91 dev->si_refcount++; 92} 93 94void 95dev_rel(struct cdev *dev) 96{ 97 int flag = 0; 98 99 mtx_assert(&devmtx, MA_NOTOWNED); 100 dev_lock(); 101 dev->si_refcount--; 102 KASSERT(dev->si_refcount >= 0, 103 ("dev_rel(%s) gave negative count", devtoname(dev))); 104 if (dev->si_usecount == 0 && 105 (dev->si_flags & SI_CHEAPCLONE) && (dev->si_flags & SI_NAMED)) 106 if (dev->si_devsw == NULL && dev->si_refcount == 0) { 107 LIST_REMOVE(dev, si_list); 108 flag = 1; 109 } 110 dev_unlock(); 111 if (flag) 112 freedev(dev); 113} 114 115struct cdevsw * 116dev_refthread(struct cdev *dev) 117{ 118 struct cdevsw *csw; 119 120 mtx_assert(&devmtx, MA_NOTOWNED); 121 dev_lock(); 122 csw = dev->si_devsw; 123 if (csw != NULL) 124 dev->si_threadcount++; 125 dev_unlock(); 126 return (csw); 127} 128 129void 130dev_relthread(struct cdev *dev) 131{ 132 133 mtx_assert(&devmtx, MA_NOTOWNED); 134 dev_lock(); 135 dev->si_threadcount--; 136 dev_unlock(); 137} 138 139int 140nullop(void) 141{ 142 143 return (0); 144} 145 146int 147eopnotsupp(void) 148{ 149 150 return (EOPNOTSUPP); 151} 152 153static int 154enxio(void) 155{ 156 return (ENXIO); 157} 158 159static int 160enodev(void) 161{ 162 return (ENODEV); 163} 164 165/* Define a dead_cdevsw for use when devices leave unexpectedly. */ 166 167#define dead_open (d_open_t *)enxio 168#define dead_close (d_close_t *)enxio 169#define dead_read (d_read_t *)enxio 170#define dead_write (d_write_t *)enxio 171#define dead_ioctl (d_ioctl_t *)enxio 172#define dead_poll (d_poll_t *)enodev 173#define dead_mmap (d_mmap_t *)enodev 174 175static void 176dead_strategy(struct bio *bp) 177{ 178 179 biofinish(bp, NULL, ENXIO); 180} 181 182#define dead_dump (dumper_t *)enxio 183#define dead_kqfilter (d_kqfilter_t *)enxio 184 185static struct cdevsw dead_cdevsw = { 186 .d_version = D_VERSION, 187 .d_flags = D_NEEDGIANT, /* XXX: does dead_strategy need this ? */ 188 .d_open = dead_open, 189 .d_close = dead_close, 190 .d_read = dead_read, 191 .d_write = dead_write, 192 .d_ioctl = dead_ioctl, 193 .d_poll = dead_poll, 194 .d_mmap = dead_mmap, 195 .d_strategy = dead_strategy, 196 .d_name = "dead", 197 .d_dump = dead_dump, 198 .d_kqfilter = dead_kqfilter 199}; 200 201/* Default methods if driver does not specify method */ 202 203#define null_open (d_open_t *)nullop 204#define null_close (d_close_t *)nullop 205#define no_read (d_read_t *)enodev 206#define no_write (d_write_t *)enodev 207#define no_ioctl (d_ioctl_t *)enodev 208#define no_mmap (d_mmap_t *)enodev 209#define no_kqfilter (d_kqfilter_t *)enodev 210 211static void 212no_strategy(struct bio *bp) 213{ 214 215 biofinish(bp, NULL, ENODEV); 216} 217 218static int 219no_poll(struct cdev *dev __unused, int events, struct thread *td __unused) 220{ 221 /* 222 * Return true for read/write. If the user asked for something 223 * special, return POLLNVAL, so that clients have a way of 224 * determining reliably whether or not the extended 225 * functionality is present without hard-coding knowledge 226 * of specific filesystem implementations. 227 * Stay in sync with vop_nopoll(). 228 */ 229 if (events & ~POLLSTANDARD) 230 return (POLLNVAL); 231 232 return (events & (POLLIN | POLLOUT | POLLRDNORM | POLLWRNORM)); 233} 234 235#define no_dump (dumper_t *)enodev 236 237/* 238 * struct cdev * and u_dev_t primitives 239 */ 240 241int 242minor(struct cdev *x) 243{ 244 if (x == NULL) 245 return NODEV; 246 return(x->si_drv0 & MAXMINOR); 247} 248 249int 250dev2unit(struct cdev *x) 251{ 252 253 if (x == NULL) 254 return NODEV; 255 return (minor2unit(minor(x))); 256} 257 258u_int 259minor2unit(u_int _minor) 260{ 261 262 KASSERT((_minor & ~MAXMINOR) == 0, ("Illegal minor %x", _minor)); 263 return ((_minor & 0xff) | ((_minor >> 8) & 0xffff00)); 264} 265 266int 267unit2minor(int unit) 268{ 269 270 KASSERT(unit <= 0xffffff, ("Invalid unit (%d) in unit2minor", unit)); 271 return ((unit & 0xff) | ((unit << 8) & ~0xffff)); 272} 273 274static struct cdev * 275allocdev(void) 276{ 277 struct cdev *si; 278 279 si = malloc(sizeof *si, M_DEVT, M_USE_RESERVE | M_ZERO | M_WAITOK); 280 si->si_name = si->__si_namebuf; 281 LIST_INIT(&si->si_children); 282 LIST_INIT(&si->si_alist); 283 return (si); 284} 285 286static struct cdev * 287newdev(struct cdevsw *csw, int y, struct cdev *si) 288{ 289 struct cdev *si2; 290 dev_t udev; 291 292 mtx_assert(&devmtx, MA_OWNED); 293 udev = y; 294 LIST_FOREACH(si2, &csw->d_devs, si_list) { 295 if (si2->si_drv0 == udev) { 296 freedev(si); 297 return (si2); 298 } 299 } 300 si->si_drv0 = udev; 301 LIST_INSERT_HEAD(&csw->d_devs, si, si_list); 302 return (si); 303} 304 305static void 306freedev(struct cdev *dev) 307{ 308 309 if (dev->si_cred != NULL) 310 crfree(dev->si_cred); 311 free(dev, M_DEVT); 312} 313 314int 315uminor(dev_t dev) 316{ 317 return (dev & MAXMINOR); 318} 319 320int 321umajor(dev_t dev) 322{ 323 return ((dev & ~MAXMINOR) >> 8); 324} 325 326static void 327fini_cdevsw(struct cdevsw *devsw) 328{ 329 330 devsw->d_flags &= ~D_INIT; 331} 332 333static void 334prep_cdevsw(struct cdevsw *devsw) 335{ 336 337 dev_lock(); 338 339 if (devsw->d_version != D_VERSION_01) { 340 printf( 341 "WARNING: Device driver \"%s\" has wrong version %s\n", 342 devsw->d_name, "and is disabled. Recompile KLD module."); 343 devsw->d_open = dead_open; 344 devsw->d_close = dead_close; 345 devsw->d_read = dead_read; 346 devsw->d_write = dead_write; 347 devsw->d_ioctl = dead_ioctl; 348 devsw->d_poll = dead_poll; 349 devsw->d_mmap = dead_mmap; 350 devsw->d_strategy = dead_strategy; 351 devsw->d_dump = dead_dump; 352 devsw->d_kqfilter = dead_kqfilter; 353 } 354 355 if (devsw->d_flags & D_TTY) { 356 if (devsw->d_ioctl == NULL) devsw->d_ioctl = ttyioctl; 357 if (devsw->d_read == NULL) devsw->d_read = ttyread; 358 if (devsw->d_write == NULL) devsw->d_write = ttywrite; 359 if (devsw->d_kqfilter == NULL) devsw->d_kqfilter = ttykqfilter; 360 if (devsw->d_poll == NULL) devsw->d_poll = ttypoll; 361 } 362 363 if (devsw->d_open == NULL) devsw->d_open = null_open; 364 if (devsw->d_close == NULL) devsw->d_close = null_close; 365 if (devsw->d_read == NULL) devsw->d_read = no_read; 366 if (devsw->d_write == NULL) devsw->d_write = no_write; 367 if (devsw->d_ioctl == NULL) devsw->d_ioctl = no_ioctl; 368 if (devsw->d_poll == NULL) devsw->d_poll = no_poll; 369 if (devsw->d_mmap == NULL) devsw->d_mmap = no_mmap; 370 if (devsw->d_strategy == NULL) devsw->d_strategy = no_strategy; 371 if (devsw->d_dump == NULL) devsw->d_dump = no_dump; 372 if (devsw->d_kqfilter == NULL) devsw->d_kqfilter = no_kqfilter; 373 374 LIST_INIT(&devsw->d_devs); 375 376 devsw->d_flags |= D_INIT; 377 378 dev_unlock(); 379} 380 381static struct cdev * 382make_dev_credv(struct cdevsw *devsw, int minornr, struct ucred *cr, uid_t uid, 383 gid_t gid, int mode, const char *fmt, va_list ap) 384{ 385 struct cdev *dev; 386 int i; 387 388 KASSERT((minornr & ~MAXMINOR) == 0, 389 ("Invalid minor (0x%x) in make_dev", minornr)); 390 391 if (!(devsw->d_flags & D_INIT)) 392 prep_cdevsw(devsw); 393 dev = allocdev(); 394 dev_lock(); 395 dev = newdev(devsw, minornr, dev); 396 if (dev->si_flags & SI_CHEAPCLONE && 397 dev->si_flags & SI_NAMED && 398 dev->si_devsw == devsw) { 399 /* 400 * This is allowed as it removes races and generally 401 * simplifies cloning devices. 402 * XXX: still ?? 403 */ 404 dev_unlock(); 405 return (dev); 406 } 407 KASSERT(!(dev->si_flags & SI_NAMED), 408 ("make_dev() by driver %s on pre-existing device (min=%x, name=%s)", 409 devsw->d_name, minor(dev), devtoname(dev))); 410 411 i = vsnrprintf(dev->__si_namebuf, sizeof dev->__si_namebuf, 32, fmt, ap); 412 if (i > (sizeof dev->__si_namebuf - 1)) { 413 printf("WARNING: Device name truncated! (%s)\n", 414 dev->__si_namebuf); 415 } 416 417 dev->si_devsw = devsw; 418 dev->si_flags |= SI_NAMED; 419 if (cr != NULL) 420 dev->si_cred = crhold(cr); 421 else 422 dev->si_cred = NULL; 423 dev->si_uid = uid; 424 dev->si_gid = gid; 425 dev->si_mode = mode; 426 427 devfs_create(dev); 428 dev_unlock(); 429 return (dev); 430} 431 432struct cdev * 433make_dev(struct cdevsw *devsw, int minornr, uid_t uid, gid_t gid, int mode, 434 const char *fmt, ...) 435{ 436 struct cdev *dev; 437 va_list ap; 438 439 va_start(ap, fmt); 440 dev = make_dev_credv(devsw, minornr, NULL, uid, gid, mode, fmt, ap); 441 va_end(ap); 442 return (dev); 443} 444 445struct cdev * 446make_dev_cred(struct cdevsw *devsw, int minornr, struct ucred *cr, uid_t uid, 447 gid_t gid, int mode, const char *fmt, ...) 448{ 449 struct cdev *dev; 450 va_list ap; 451 452 va_start(ap, fmt); 453 dev = make_dev_credv(devsw, minornr, cr, uid, gid, mode, fmt, ap); 454 va_end(ap); 455 456 return (dev); 457} 458 459int 460dev_named(struct cdev *pdev, const char *name) 461{ 462 struct cdev *cdev; 463 464 if (strcmp(devtoname(pdev), name) == 0) 465 return (1); 466 LIST_FOREACH(cdev, &pdev->si_children, si_siblings) 467 if (strcmp(devtoname(cdev), name) == 0) 468 return (1); 469 return (0); 470} 471 472void 473dev_depends(struct cdev *pdev, struct cdev *cdev) 474{ 475 476 dev_lock(); 477 cdev->si_parent = pdev; 478 cdev->si_flags |= SI_CHILD; 479 LIST_INSERT_HEAD(&pdev->si_children, cdev, si_siblings); 480 dev_unlock(); 481} 482 483struct cdev * 484make_dev_alias(struct cdev *pdev, const char *fmt, ...) 485{ 486 struct cdev *dev; 487 va_list ap; 488 int i; 489 490 dev = allocdev(); 491 dev_lock(); 492 dev->si_flags |= SI_ALIAS; 493 dev->si_flags |= SI_NAMED; 494 va_start(ap, fmt); 495 i = vsnrprintf(dev->__si_namebuf, sizeof dev->__si_namebuf, 32, fmt, ap); 496 if (i > (sizeof dev->__si_namebuf - 1)) { 497 printf("WARNING: Device name truncated! (%s)\n", 498 dev->__si_namebuf); 499 } 500 va_end(ap); 501 502 devfs_create(dev); 503 dev_unlock(); 504 dev_depends(pdev, dev); 505 return (dev); 506} 507 508static void 509destroy_devl(struct cdev *dev) 510{ 511 struct cdevsw *csw; 512 513 mtx_assert(&devmtx, MA_OWNED); 514 KASSERT(dev->si_flags & SI_NAMED, 515 ("WARNING: Driver mistake: destroy_dev on %d\n", minor(dev))); 516 517 devfs_destroy(dev); 518 519 /* Remove name marking */ 520 dev->si_flags &= ~SI_NAMED; 521 522 /* If we are a child, remove us from the parents list */ 523 if (dev->si_flags & SI_CHILD) { 524 LIST_REMOVE(dev, si_siblings); 525 dev->si_flags &= ~SI_CHILD; 526 } 527 528 /* Kill our children */ 529 while (!LIST_EMPTY(&dev->si_children)) 530 destroy_devl(LIST_FIRST(&dev->si_children)); 531 532 /* Remove from clone list */ 533 if (dev->si_flags & SI_CLONELIST) { 534 LIST_REMOVE(dev, si_clone); 535 dev->si_flags &= ~SI_CLONELIST; 536 } 537 538 csw = dev->si_devsw; 539 dev->si_devsw = NULL; /* already NULL for SI_ALIAS */ 540 while (csw != NULL && csw->d_purge != NULL && dev->si_threadcount) { 541 printf("Purging %lu threads from %s\n", 542 dev->si_threadcount, devtoname(dev)); 543 csw->d_purge(dev); 544 msleep(csw, &devmtx, PRIBIO, "devprg", hz/10); 545 } 546 if (csw != NULL && csw->d_purge != NULL) 547 printf("All threads purged from %s\n", devtoname(dev)); 548 549 dev->si_drv1 = 0; 550 dev->si_drv2 = 0; 551 bzero(&dev->__si_u, sizeof(dev->__si_u)); 552 553 if (!(dev->si_flags & SI_ALIAS)) { 554 /* Remove from cdevsw list */ 555 LIST_REMOVE(dev, si_list); 556 557 /* If cdevsw has no struct cdev *'s, clean it */ 558 if (LIST_EMPTY(&csw->d_devs)) 559 fini_cdevsw(csw); 560 } 561 dev->si_flags &= ~SI_ALIAS; 562 563 if (dev->si_refcount > 0) { 564 LIST_INSERT_HEAD(&dead_cdevsw.d_devs, dev, si_list); 565 } else { 566 freedev(dev); 567 } 568} 569 570void 571destroy_dev(struct cdev *dev) 572{ 573 574 dev_lock(); 575 destroy_devl(dev); 576 dev_unlock(); 577} 578 579const char * 580devtoname(struct cdev *dev) 581{ 582 char *p; 583 struct cdevsw *csw; 584 int mynor; 585 586 if (dev->si_name[0] == '#' || dev->si_name[0] == '\0') { 587 p = dev->si_name; 588 csw = dev_refthread(dev); 589 if (csw != NULL) { 590 sprintf(p, "(%s)", csw->d_name); 591 dev_relthread(dev); 592 } 593 p += strlen(p); 594 mynor = minor(dev); 595 if (mynor < 0 || mynor > 255) 596 sprintf(p, "/%#x", (u_int)mynor); 597 else 598 sprintf(p, "/%d", mynor); 599 } 600 return (dev->si_name); 601} 602 603int 604dev_stdclone(char *name, char **namep, const char *stem, int *unit) 605{ 606 int u, i; 607 608 i = strlen(stem); 609 if (bcmp(stem, name, i) != 0) 610 return (0); 611 if (!isdigit(name[i])) 612 return (0); 613 u = 0; 614 if (name[i] == '0' && isdigit(name[i+1])) 615 return (0); 616 while (isdigit(name[i])) { 617 u *= 10; 618 u += name[i++] - '0'; 619 } 620 if (u > 0xffffff) 621 return (0); 622 *unit = u; 623 if (namep) 624 *namep = &name[i]; 625 if (name[i]) 626 return (2); 627 return (1); 628} 629 630/* 631 * Helper functions for cloning device drivers. 632 * 633 * The objective here is to make it unnecessary for the device drivers to 634 * use rman or similar to manage their unit number space. Due to the way 635 * we do "on-demand" devices, using rman or other "private" methods 636 * will be very tricky to lock down properly once we lock down this file. 637 * 638 * Instead we give the drivers these routines which puts the struct cdev *'s 639 * that are to be managed on their own list, and gives the driver the ability 640 * to ask for the first free unit number or a given specified unit number. 641 * 642 * In addition these routines support paired devices (pty, nmdm and similar) 643 * by respecting a number of "flag" bits in the minor number. 644 * 645 */ 646 647struct clonedevs { 648 LIST_HEAD(,cdev) head; 649}; 650 651void 652clone_setup(struct clonedevs **cdp) 653{ 654 655 *cdp = malloc(sizeof **cdp, M_DEVBUF, M_WAITOK | M_ZERO); 656 LIST_INIT(&(*cdp)->head); 657} 658 659int 660clone_create(struct clonedevs **cdp, struct cdevsw *csw, int *up, struct cdev **dp, u_int extra) 661{ 662 struct clonedevs *cd; 663 struct cdev *dev, *ndev, *dl, *de; 664 int unit, low, u; 665 666 KASSERT(*cdp != NULL, 667 ("clone_setup() not called in driver \"%s\"", csw->d_name)); 668 KASSERT(!(extra & CLONE_UNITMASK), 669 ("Illegal extra bits (0x%x) in clone_create", extra)); 670 KASSERT(*up <= CLONE_UNITMASK, 671 ("Too high unit (0x%x) in clone_create", *up)); 672 673 if (!(csw->d_flags & D_INIT)) 674 prep_cdevsw(csw); 675 676 /* 677 * Search the list for a lot of things in one go: 678 * A preexisting match is returned immediately. 679 * The lowest free unit number if we are passed -1, and the place 680 * in the list where we should insert that new element. 681 * The place to insert a specified unit number, if applicable 682 * the end of the list. 683 */ 684 unit = *up; 685 ndev = allocdev(); 686 dev_lock(); 687 low = extra; 688 de = dl = NULL; 689 cd = *cdp; 690 LIST_FOREACH(dev, &cd->head, si_clone) { 691 KASSERT(dev->si_flags & SI_CLONELIST, 692 ("Dev %p(%s) should be on clonelist", dev, dev->si_name)); 693 u = dev2unit(dev); 694 if (u == (unit | extra)) { 695 *dp = dev; 696 freedev(ndev); 697 dev_unlock(); 698 return (0); 699 } 700 if (unit == -1 && u == low) { 701 low++; 702 de = dev; 703 continue; 704 } 705 if (u > (unit | extra)) { 706 dl = dev; 707 break; 708 } 709 } 710 if (unit == -1) 711 unit = low & CLONE_UNITMASK; 712 dev = newdev(csw, unit2minor(unit | extra), ndev); 713 if (dev->si_flags & SI_CLONELIST) { 714 printf("dev %p (%s) is on clonelist\n", dev, dev->si_name); 715 printf("unit=%d\n", unit); 716 LIST_FOREACH(dev, &cd->head, si_clone) { 717 printf("\t%p %s\n", dev, dev->si_name); 718 } 719 panic("foo"); 720 } 721 KASSERT(!(dev->si_flags & SI_CLONELIST), 722 ("Dev %p(%s) should not be on clonelist", dev, dev->si_name)); 723 if (dl != NULL) 724 LIST_INSERT_BEFORE(dl, dev, si_clone); 725 else if (de != NULL) 726 LIST_INSERT_AFTER(de, dev, si_clone); 727 else 728 LIST_INSERT_HEAD(&cd->head, dev, si_clone); 729 dev->si_flags |= SI_CLONELIST; 730 *up = unit; 731 dev_unlock(); 732 return (1); 733} 734 735/* 736 * Kill everything still on the list. The driver should already have 737 * disposed of any softc hung of the struct cdev *'s at this time. 738 */ 739void 740clone_cleanup(struct clonedevs **cdp) 741{ 742 struct cdev *dev, *tdev; 743 struct clonedevs *cd; 744 745 cd = *cdp; 746 if (cd == NULL) 747 return; 748 dev_lock(); 749 LIST_FOREACH_SAFE(dev, &cd->head, si_clone, tdev) { 750 KASSERT(dev->si_flags & SI_CLONELIST, 751 ("Dev %p(%s) should be on clonelist", dev, dev->si_name)); 752 KASSERT(dev->si_flags & SI_NAMED, 753 ("Driver has goofed in cloning underways udev %x", dev->si_drv0)); 754 destroy_devl(dev); 755 } 756 dev_unlock(); 757 free(cd, M_DEVBUF); 758 *cdp = NULL; 759} 760