dksubr.c revision 1.51.2.3
1 /* $NetBSD: dksubr.c,v 1.51.2.3 2015/06/01 19:19:44 snj Exp $ */ 2 3 /*- 4 * Copyright (c) 1996, 1997, 1998, 1999, 2002, 2008 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Jason R. Thorpe and Roland C. Dowdeswell. 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 32 #include <sys/cdefs.h> 33 __KERNEL_RCSID(0, "$NetBSD: dksubr.c,v 1.51.2.3 2015/06/01 19:19:44 snj Exp $"); 34 35 #include <sys/param.h> 36 #include <sys/systm.h> 37 #include <sys/stat.h> 38 #include <sys/proc.h> 39 #include <sys/ioctl.h> 40 #include <sys/device.h> 41 #include <sys/disk.h> 42 #include <sys/disklabel.h> 43 #include <sys/buf.h> 44 #include <sys/bufq.h> 45 #include <sys/vnode.h> 46 #include <sys/fcntl.h> 47 #include <sys/namei.h> 48 #include <sys/module.h> 49 50 #include <dev/dkvar.h> 51 #include <miscfs/specfs/specdev.h> /* for v_rdev */ 52 53 int dkdebug = 0; 54 55 #ifdef DEBUG 56 #define DKDB_FOLLOW 0x1 57 #define DKDB_INIT 0x2 58 #define DKDB_VNODE 0x4 59 60 #define IFDEBUG(x,y) if (dkdebug & (x)) y 61 #define DPRINTF(x,y) IFDEBUG(x, printf y) 62 #define DPRINTF_FOLLOW(y) DPRINTF(DKDB_FOLLOW, y) 63 #else 64 #define IFDEBUG(x,y) 65 #define DPRINTF(x,y) 66 #define DPRINTF_FOLLOW(y) 67 #endif 68 69 static int dk_subr_modcmd(modcmd_t, void *); 70 71 #define DKLABELDEV(dev) \ 72 (MAKEDISKDEV(major((dev)), DISKUNIT((dev)), RAW_PART)) 73 74 static void dk_makedisklabel(struct dk_intf *, struct dk_softc *); 75 76 void 77 dk_sc_init(struct dk_softc *dksc, const char *xname) 78 { 79 80 memset(dksc, 0x0, sizeof(*dksc)); 81 strncpy(dksc->sc_xname, xname, DK_XNAME_SIZE); 82 dksc->sc_dkdev.dk_name = dksc->sc_xname; 83 } 84 85 /* ARGSUSED */ 86 int 87 dk_open(struct dk_intf *di, struct dk_softc *dksc, dev_t dev, 88 int flags, int fmt, struct lwp *l) 89 { 90 struct disklabel *lp = dksc->sc_dkdev.dk_label; 91 int part = DISKPART(dev); 92 int pmask = 1 << part; 93 int ret = 0; 94 struct disk *dk = &dksc->sc_dkdev; 95 96 DPRINTF_FOLLOW(("dk_open(%s, %p, 0x%"PRIx64", 0x%x)\n", 97 di->di_dkname, dksc, dev, flags)); 98 99 mutex_enter(&dk->dk_openlock); 100 part = DISKPART(dev); 101 102 /* 103 * If there are wedges, and this is not RAW_PART, then we 104 * need to fail. 105 */ 106 if (dk->dk_nwedges != 0 && part != RAW_PART) { 107 ret = EBUSY; 108 goto done; 109 } 110 111 pmask = 1 << part; 112 113 /* 114 * If we're init'ed and there are no other open partitions then 115 * update the in-core disklabel. 116 */ 117 if ((dksc->sc_flags & DKF_INITED)) { 118 if (dk->dk_openmask == 0) { 119 dk_getdisklabel(di, dksc, dev); 120 } 121 /* XXX re-discover wedges? */ 122 } 123 124 /* Fail if we can't find the partition. */ 125 if ((part != RAW_PART) && 126 (((dksc->sc_flags & DKF_INITED) == 0) || 127 ((part >= lp->d_npartitions) || 128 (lp->d_partitions[part].p_fstype == FS_UNUSED)))) { 129 ret = ENXIO; 130 goto done; 131 } 132 133 /* Mark our unit as open. */ 134 switch (fmt) { 135 case S_IFCHR: 136 dk->dk_copenmask |= pmask; 137 break; 138 case S_IFBLK: 139 dk->dk_bopenmask |= pmask; 140 break; 141 } 142 143 dk->dk_openmask = dk->dk_copenmask | dk->dk_bopenmask; 144 145 done: 146 mutex_exit(&dk->dk_openlock); 147 return ret; 148 } 149 150 /* ARGSUSED */ 151 int 152 dk_close(struct dk_intf *di, struct dk_softc *dksc, dev_t dev, 153 int flags, int fmt, struct lwp *l) 154 { 155 int part = DISKPART(dev); 156 int pmask = 1 << part; 157 struct disk *dk = &dksc->sc_dkdev; 158 159 DPRINTF_FOLLOW(("dk_close(%s, %p, 0x%"PRIx64", 0x%x)\n", 160 di->di_dkname, dksc, dev, flags)); 161 162 mutex_enter(&dk->dk_openlock); 163 164 switch (fmt) { 165 case S_IFCHR: 166 dk->dk_copenmask &= ~pmask; 167 break; 168 case S_IFBLK: 169 dk->dk_bopenmask &= ~pmask; 170 break; 171 } 172 dk->dk_openmask = dk->dk_copenmask | dk->dk_bopenmask; 173 174 mutex_exit(&dk->dk_openlock); 175 return 0; 176 } 177 178 void 179 dk_strategy(struct dk_intf *di, struct dk_softc *dksc, struct buf *bp) 180 { 181 int s; 182 int wlabel; 183 daddr_t blkno; 184 185 DPRINTF_FOLLOW(("dk_strategy(%s, %p, %p)\n", 186 di->di_dkname, dksc, bp)); 187 188 if (!(dksc->sc_flags & DKF_INITED)) { 189 DPRINTF_FOLLOW(("dk_strategy: not inited\n")); 190 bp->b_error = ENXIO; 191 biodone(bp); 192 return; 193 } 194 195 /* XXX look for some more errors, c.f. ld.c */ 196 197 bp->b_resid = bp->b_bcount; 198 199 /* If there is nothing to do, then we are done */ 200 if (bp->b_bcount == 0) { 201 biodone(bp); 202 return; 203 } 204 205 wlabel = dksc->sc_flags & (DKF_WLABEL|DKF_LABELLING); 206 if (DISKPART(bp->b_dev) != RAW_PART && 207 bounds_check_with_label(&dksc->sc_dkdev, bp, wlabel) <= 0) { 208 biodone(bp); 209 return; 210 } 211 212 blkno = bp->b_blkno; 213 if (DISKPART(bp->b_dev) != RAW_PART) { 214 struct partition *pp; 215 216 pp = 217 &dksc->sc_dkdev.dk_label->d_partitions[DISKPART(bp->b_dev)]; 218 blkno += pp->p_offset; 219 } 220 bp->b_rawblkno = blkno; 221 222 /* 223 * Start the unit by calling the start routine 224 * provided by the individual driver. 225 */ 226 s = splbio(); 227 bufq_put(dksc->sc_bufq, bp); 228 di->di_diskstart(dksc); 229 splx(s); 230 return; 231 } 232 233 int 234 dk_size(struct dk_intf *di, struct dk_softc *dksc, dev_t dev) 235 { 236 struct disklabel *lp; 237 int is_open; 238 int part; 239 int size; 240 241 if ((dksc->sc_flags & DKF_INITED) == 0) 242 return -1; 243 244 part = DISKPART(dev); 245 is_open = dksc->sc_dkdev.dk_openmask & (1 << part); 246 247 if (!is_open && di->di_open(dev, 0, S_IFBLK, curlwp)) 248 return -1; 249 250 lp = dksc->sc_dkdev.dk_label; 251 if (lp->d_partitions[part].p_fstype != FS_SWAP) 252 size = -1; 253 else 254 size = lp->d_partitions[part].p_size * 255 (lp->d_secsize / DEV_BSIZE); 256 257 if (!is_open && di->di_close(dev, 0, S_IFBLK, curlwp)) 258 return 1; 259 260 return size; 261 } 262 263 int 264 dk_ioctl(struct dk_intf *di, struct dk_softc *dksc, dev_t dev, 265 u_long cmd, void *data, int flag, struct lwp *l) 266 { 267 struct disklabel *lp; 268 struct disk *dk; 269 #ifdef __HAVE_OLD_DISKLABEL 270 struct disklabel newlabel; 271 #endif 272 int error = 0; 273 274 DPRINTF_FOLLOW(("dk_ioctl(%s, %p, 0x%"PRIx64", 0x%lx)\n", 275 di->di_dkname, dksc, dev, cmd)); 276 277 /* ensure that the pseudo disk is open for writes for these commands */ 278 switch (cmd) { 279 case DIOCSDINFO: 280 case DIOCWDINFO: 281 #ifdef __HAVE_OLD_DISKLABEL 282 case ODIOCSDINFO: 283 case ODIOCWDINFO: 284 #endif 285 case DIOCWLABEL: 286 case DIOCAWEDGE: 287 case DIOCDWEDGE: 288 if ((flag & FWRITE) == 0) 289 return EBADF; 290 } 291 292 /* ensure that the pseudo-disk is initialized for these */ 293 switch (cmd) { 294 case DIOCGDINFO: 295 case DIOCSDINFO: 296 case DIOCWDINFO: 297 case DIOCGPART: 298 case DIOCWLABEL: 299 case DIOCGDEFLABEL: 300 case DIOCAWEDGE: 301 case DIOCDWEDGE: 302 case DIOCLWEDGES: 303 case DIOCMWEDGES: 304 case DIOCCACHESYNC: 305 #ifdef __HAVE_OLD_DISKLABEL 306 case ODIOCGDINFO: 307 case ODIOCSDINFO: 308 case ODIOCWDINFO: 309 case ODIOCGDEFLABEL: 310 #endif 311 if ((dksc->sc_flags & DKF_INITED) == 0) 312 return ENXIO; 313 } 314 315 switch (cmd) { 316 case DIOCGDINFO: 317 *(struct disklabel *)data = *(dksc->sc_dkdev.dk_label); 318 break; 319 320 #ifdef __HAVE_OLD_DISKLABEL 321 case ODIOCGDINFO: 322 newlabel = *(dksc->sc_dkdev.dk_label); 323 if (newlabel.d_npartitions > OLDMAXPARTITIONS) 324 return ENOTTY; 325 memcpy(data, &newlabel, sizeof (struct olddisklabel)); 326 break; 327 #endif 328 329 case DIOCGPART: 330 ((struct partinfo *)data)->disklab = dksc->sc_dkdev.dk_label; 331 ((struct partinfo *)data)->part = 332 &dksc->sc_dkdev.dk_label->d_partitions[DISKPART(dev)]; 333 break; 334 335 case DIOCWDINFO: 336 case DIOCSDINFO: 337 #ifdef __HAVE_OLD_DISKLABEL 338 case ODIOCWDINFO: 339 case ODIOCSDINFO: 340 #endif 341 #ifdef __HAVE_OLD_DISKLABEL 342 if (cmd == ODIOCSDINFO || cmd == ODIOCWDINFO) { 343 memset(&newlabel, 0, sizeof newlabel); 344 memcpy(&newlabel, data, sizeof (struct olddisklabel)); 345 lp = &newlabel; 346 } else 347 #endif 348 lp = (struct disklabel *)data; 349 350 dk = &dksc->sc_dkdev; 351 mutex_enter(&dk->dk_openlock); 352 dksc->sc_flags |= DKF_LABELLING; 353 354 error = setdisklabel(dksc->sc_dkdev.dk_label, 355 lp, 0, dksc->sc_dkdev.dk_cpulabel); 356 if (error == 0) { 357 if (cmd == DIOCWDINFO 358 #ifdef __HAVE_OLD_DISKLABEL 359 || cmd == ODIOCWDINFO 360 #endif 361 ) 362 error = writedisklabel(DKLABELDEV(dev), 363 di->di_strategy, dksc->sc_dkdev.dk_label, 364 dksc->sc_dkdev.dk_cpulabel); 365 } 366 367 dksc->sc_flags &= ~DKF_LABELLING; 368 mutex_exit(&dk->dk_openlock); 369 break; 370 371 case DIOCWLABEL: 372 if (*(int *)data != 0) 373 dksc->sc_flags |= DKF_WLABEL; 374 else 375 dksc->sc_flags &= ~DKF_WLABEL; 376 break; 377 378 case DIOCGDEFLABEL: 379 dk_getdefaultlabel(di, dksc, (struct disklabel *)data); 380 break; 381 382 #ifdef __HAVE_OLD_DISKLABEL 383 case ODIOCGDEFLABEL: 384 dk_getdefaultlabel(di, dksc, &newlabel); 385 if (newlabel.d_npartitions > OLDMAXPARTITIONS) 386 return ENOTTY; 387 memcpy(data, &newlabel, sizeof (struct olddisklabel)); 388 break; 389 #endif 390 391 case DIOCAWEDGE: 392 { 393 struct dkwedge_info *dkw = (void *)data; 394 395 if ((flag & FWRITE) == 0) 396 return (EBADF); 397 398 /* If the ioctl happens here, the parent is us. */ 399 strcpy(dkw->dkw_parent, dksc->sc_dkdev.dk_name); 400 return (dkwedge_add(dkw)); 401 } 402 403 case DIOCDWEDGE: 404 { 405 struct dkwedge_info *dkw = (void *)data; 406 407 if ((flag & FWRITE) == 0) 408 return (EBADF); 409 410 /* If the ioctl happens here, the parent is us. */ 411 strcpy(dkw->dkw_parent, dksc->sc_dkdev.dk_name); 412 return (dkwedge_del(dkw)); 413 } 414 415 case DIOCLWEDGES: 416 { 417 struct dkwedge_list *dkwl = (void *)data; 418 419 return (dkwedge_list(&dksc->sc_dkdev, dkwl, l)); 420 } 421 422 case DIOCMWEDGES: 423 { 424 if ((flag & FWRITE) == 0) 425 return (EBADF); 426 427 dkwedge_discover(&dksc->sc_dkdev); 428 return 0; 429 } 430 431 case DIOCGSTRATEGY: 432 { 433 struct disk_strategy *dks = (void *)data; 434 int s; 435 436 s = splbio(); 437 strlcpy(dks->dks_name, bufq_getstrategyname(dksc->sc_bufq), 438 sizeof(dks->dks_name)); 439 splx(s); 440 dks->dks_paramlen = 0; 441 442 return 0; 443 } 444 445 case DIOCSSTRATEGY: 446 { 447 struct disk_strategy *dks = (void *)data; 448 struct bufq_state *new; 449 struct bufq_state *old; 450 int s; 451 452 if ((flag & FWRITE) == 0) { 453 return EBADF; 454 } 455 if (dks->dks_param != NULL) { 456 return EINVAL; 457 } 458 dks->dks_name[sizeof(dks->dks_name) - 1] = 0; /* ensure term */ 459 error = bufq_alloc(&new, dks->dks_name, 460 BUFQ_EXACT|BUFQ_SORT_RAWBLOCK); 461 if (error) { 462 return error; 463 } 464 s = splbio(); 465 old = dksc->sc_bufq; 466 bufq_move(new, old); 467 dksc->sc_bufq = new; 468 splx(s); 469 bufq_free(old); 470 471 return 0; 472 } 473 474 default: 475 error = ENOTTY; 476 } 477 478 return error; 479 } 480 481 /* 482 * dk_dump dumps all of physical memory into the partition specified. 483 * This requires substantially more framework than {s,w}ddump, and hence 484 * is probably much more fragile. 485 * 486 * XXX: we currently do not implement this. 487 */ 488 489 #define DKF_READYFORDUMP (DKF_INITED|DKF_TAKEDUMP) 490 #define DKFF_READYFORDUMP(x) (((x) & DKF_READYFORDUMP) == DKF_READYFORDUMP) 491 static volatile int dk_dumping = 0; 492 493 /* ARGSUSED */ 494 int 495 dk_dump(struct dk_intf *di, struct dk_softc *dksc, dev_t dev, 496 daddr_t blkno, void *va, size_t size) 497 { 498 499 /* 500 * ensure that we consider this device to be safe for dumping, 501 * and that the device is configured. 502 */ 503 if (!DKFF_READYFORDUMP(dksc->sc_flags)) 504 return ENXIO; 505 506 /* ensure that we are not already dumping */ 507 if (dk_dumping) 508 return EFAULT; 509 dk_dumping = 1; 510 511 /* XXX: unimplemented */ 512 513 dk_dumping = 0; 514 515 /* XXX: actually for now, we are going to leave this alone */ 516 return ENXIO; 517 } 518 519 /* ARGSUSED */ 520 void 521 dk_getdefaultlabel(struct dk_intf *di, struct dk_softc *dksc, 522 struct disklabel *lp) 523 { 524 struct disk_geom *dg = &dksc->sc_dkdev.dk_geom; 525 526 memset(lp, 0, sizeof(*lp)); 527 528 if (dg->dg_secperunit > UINT32_MAX) 529 lp->d_secperunit = UINT32_MAX; 530 else 531 lp->d_secperunit = dg->dg_secperunit; 532 lp->d_secsize = dg->dg_secsize; 533 lp->d_nsectors = dg->dg_nsectors; 534 lp->d_ntracks = dg->dg_ntracks; 535 lp->d_ncylinders = dg->dg_ncylinders; 536 lp->d_secpercyl = lp->d_ntracks * lp->d_nsectors; 537 538 strncpy(lp->d_typename, di->di_dkname, sizeof(lp->d_typename)); 539 lp->d_type = di->di_dtype; 540 strncpy(lp->d_packname, "fictitious", sizeof(lp->d_packname)); 541 lp->d_rpm = 3600; 542 lp->d_interleave = 1; 543 lp->d_flags = 0; 544 545 lp->d_partitions[RAW_PART].p_offset = 0; 546 lp->d_partitions[RAW_PART].p_size = lp->d_secperunit; 547 lp->d_partitions[RAW_PART].p_fstype = FS_UNUSED; 548 lp->d_npartitions = RAW_PART + 1; 549 550 lp->d_magic = DISKMAGIC; 551 lp->d_magic2 = DISKMAGIC; 552 lp->d_checksum = dkcksum(dksc->sc_dkdev.dk_label); 553 } 554 555 /* ARGSUSED */ 556 void 557 dk_getdisklabel(struct dk_intf *di, struct dk_softc *dksc, dev_t dev) 558 { 559 struct disklabel *lp = dksc->sc_dkdev.dk_label; 560 struct cpu_disklabel *clp = dksc->sc_dkdev.dk_cpulabel; 561 struct disk_geom *dg = &dksc->sc_dkdev.dk_geom; 562 struct partition *pp; 563 int i; 564 const char *errstring; 565 566 memset(clp, 0x0, sizeof(*clp)); 567 dk_getdefaultlabel(di, dksc, lp); 568 errstring = readdisklabel(DKLABELDEV(dev), di->di_strategy, 569 dksc->sc_dkdev.dk_label, dksc->sc_dkdev.dk_cpulabel); 570 if (errstring) { 571 dk_makedisklabel(di, dksc); 572 if (dksc->sc_flags & DKF_WARNLABEL) 573 printf("%s: %s\n", dksc->sc_xname, errstring); 574 return; 575 } 576 577 if ((dksc->sc_flags & DKF_LABELSANITY) == 0) 578 return; 579 580 /* Sanity check */ 581 if (lp->d_secperunit < UINT32_MAX ? 582 lp->d_secperunit != dg->dg_secperunit : 583 lp->d_secperunit > dg->dg_secperunit) 584 printf("WARNING: %s: total sector size in disklabel (%ju) " 585 "!= the size of %s (%ju)\n", dksc->sc_xname, 586 (uintmax_t)lp->d_secperunit, di->di_dkname, 587 (uintmax_t)dg->dg_secperunit); 588 589 for (i=0; i < lp->d_npartitions; i++) { 590 pp = &lp->d_partitions[i]; 591 if (pp->p_offset + pp->p_size > dg->dg_secperunit) 592 printf("WARNING: %s: end of partition `%c' exceeds " 593 "the size of %s (%ju)\n", dksc->sc_xname, 594 'a' + i, di->di_dkname, 595 (uintmax_t)dg->dg_secperunit); 596 } 597 } 598 599 /* ARGSUSED */ 600 static void 601 dk_makedisklabel(struct dk_intf *di, struct dk_softc *dksc) 602 { 603 struct disklabel *lp = dksc->sc_dkdev.dk_label; 604 605 lp->d_partitions[RAW_PART].p_fstype = FS_BSDFFS; 606 strncpy(lp->d_packname, "default label", sizeof(lp->d_packname)); 607 lp->d_checksum = dkcksum(lp); 608 } 609 610 /* This function is taken from ccd.c:1.76 --rcd */ 611 612 /* 613 * XXX this function looks too generic for dksubr.c, shouldn't we 614 * put it somewhere better? 615 */ 616 617 /* 618 * Lookup the provided name in the filesystem. If the file exists, 619 * is a valid block device, and isn't being used by anyone else, 620 * set *vpp to the file's vnode. 621 */ 622 int 623 dk_lookup(struct pathbuf *pb, struct lwp *l, struct vnode **vpp) 624 { 625 struct nameidata nd; 626 struct vnode *vp; 627 int error; 628 629 if (l == NULL) 630 return ESRCH; /* Is ESRCH the best choice? */ 631 632 NDINIT(&nd, LOOKUP, FOLLOW, pb); 633 if ((error = vn_open(&nd, FREAD | FWRITE, 0)) != 0) { 634 DPRINTF((DKDB_FOLLOW|DKDB_INIT), 635 ("dk_lookup: vn_open error = %d\n", error)); 636 return error; 637 } 638 639 vp = nd.ni_vp; 640 if (vp->v_type != VBLK) { 641 error = ENOTBLK; 642 goto out; 643 } 644 645 /* Reopen as anonymous vnode to protect against forced unmount. */ 646 if ((error = bdevvp(vp->v_rdev, vpp)) != 0) 647 goto out; 648 VOP_UNLOCK(vp); 649 if ((error = vn_close(vp, FREAD | FWRITE, l->l_cred)) != 0) { 650 vrele(*vpp); 651 return error; 652 } 653 if ((error = VOP_OPEN(*vpp, FREAD | FWRITE, l->l_cred)) != 0) { 654 vrele(*vpp); 655 return error; 656 } 657 mutex_enter((*vpp)->v_interlock); 658 (*vpp)->v_writecount++; 659 mutex_exit((*vpp)->v_interlock); 660 661 IFDEBUG(DKDB_VNODE, vprint("dk_lookup: vnode info", *vpp)); 662 663 return 0; 664 out: 665 VOP_UNLOCK(vp); 666 (void) vn_close(vp, FREAD | FWRITE, l->l_cred); 667 return error; 668 } 669 670 MODULE(MODULE_CLASS_MISC, dk_subr, NULL); 671 672 static int 673 dk_subr_modcmd(modcmd_t cmd, void *arg) 674 { 675 switch (cmd) { 676 case MODULE_CMD_INIT: 677 case MODULE_CMD_FINI: 678 return 0; 679 case MODULE_CMD_STAT: 680 case MODULE_CMD_AUTOUNLOAD: 681 default: 682 return ENOTTY; 683 } 684 } 685
Indexes created Wed Oct 22 13:09:56 GMT 2025