spec_vnops.c revision 1.24
1 /* $NetBSD: spec_vnops.c,v 1.24 1995/07/02 07:20:50 mycroft Exp $ */ 2 3 /* 4 * Copyright (c) 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * @(#)spec_vnops.c 8.8 (Berkeley) 11/21/94 36 */ 37 38 #include <sys/param.h> 39 #include <sys/proc.h> 40 #include <sys/systm.h> 41 #include <sys/kernel.h> 42 #include <sys/conf.h> 43 #include <sys/buf.h> 44 #include <sys/mount.h> 45 #include <sys/namei.h> 46 #include <sys/vnode.h> 47 #include <sys/stat.h> 48 #include <sys/errno.h> 49 #include <sys/ioctl.h> 50 #include <sys/file.h> 51 #include <sys/disklabel.h> 52 #include <miscfs/specfs/specdev.h> 53 54 /* symbolic sleep message strings for devices */ 55 char devopn[] = "devopn"; 56 char devio[] = "devio"; 57 char devwait[] = "devwait"; 58 char devin[] = "devin"; 59 char devout[] = "devout"; 60 char devioc[] = "devioc"; 61 char devcls[] = "devcls"; 62 63 int (**spec_vnodeop_p)(); 64 struct vnodeopv_entry_desc spec_vnodeop_entries[] = { 65 { &vop_default_desc, vn_default_error }, 66 { &vop_lookup_desc, spec_lookup }, /* lookup */ 67 { &vop_create_desc, spec_create }, /* create */ 68 { &vop_mknod_desc, spec_mknod }, /* mknod */ 69 { &vop_open_desc, spec_open }, /* open */ 70 { &vop_close_desc, spec_close }, /* close */ 71 { &vop_access_desc, spec_access }, /* access */ 72 { &vop_getattr_desc, spec_getattr }, /* getattr */ 73 { &vop_setattr_desc, spec_setattr }, /* setattr */ 74 { &vop_read_desc, spec_read }, /* read */ 75 { &vop_write_desc, spec_write }, /* write */ 76 { &vop_lease_desc, spec_lease_check }, /* lease */ 77 { &vop_ioctl_desc, spec_ioctl }, /* ioctl */ 78 { &vop_select_desc, spec_select }, /* select */ 79 { &vop_mmap_desc, spec_mmap }, /* mmap */ 80 { &vop_fsync_desc, spec_fsync }, /* fsync */ 81 { &vop_seek_desc, spec_seek }, /* seek */ 82 { &vop_remove_desc, spec_remove }, /* remove */ 83 { &vop_link_desc, spec_link }, /* link */ 84 { &vop_rename_desc, spec_rename }, /* rename */ 85 { &vop_mkdir_desc, spec_mkdir }, /* mkdir */ 86 { &vop_rmdir_desc, spec_rmdir }, /* rmdir */ 87 { &vop_symlink_desc, spec_symlink }, /* symlink */ 88 { &vop_readdir_desc, spec_readdir }, /* readdir */ 89 { &vop_readlink_desc, spec_readlink }, /* readlink */ 90 { &vop_abortop_desc, spec_abortop }, /* abortop */ 91 { &vop_inactive_desc, spec_inactive }, /* inactive */ 92 { &vop_reclaim_desc, spec_reclaim }, /* reclaim */ 93 { &vop_lock_desc, spec_lock }, /* lock */ 94 { &vop_unlock_desc, spec_unlock }, /* unlock */ 95 { &vop_bmap_desc, spec_bmap }, /* bmap */ 96 { &vop_strategy_desc, spec_strategy }, /* strategy */ 97 { &vop_print_desc, spec_print }, /* print */ 98 { &vop_islocked_desc, spec_islocked }, /* islocked */ 99 { &vop_pathconf_desc, spec_pathconf }, /* pathconf */ 100 { &vop_advlock_desc, spec_advlock }, /* advlock */ 101 { &vop_blkatoff_desc, spec_blkatoff }, /* blkatoff */ 102 { &vop_valloc_desc, spec_valloc }, /* valloc */ 103 { &vop_vfree_desc, spec_vfree }, /* vfree */ 104 { &vop_truncate_desc, spec_truncate }, /* truncate */ 105 { &vop_update_desc, spec_update }, /* update */ 106 { &vop_bwrite_desc, spec_bwrite }, /* bwrite */ 107 { (struct vnodeop_desc*)NULL, (int(*)())NULL } 108 }; 109 struct vnodeopv_desc spec_vnodeop_opv_desc = 110 { &spec_vnodeop_p, spec_vnodeop_entries }; 111 112 /* 113 * Trivial lookup routine that always fails. 114 */ 115 int 116 spec_lookup(ap) 117 struct vop_lookup_args /* { 118 struct vnode *a_dvp; 119 struct vnode **a_vpp; 120 struct componentname *a_cnp; 121 } */ *ap; 122 { 123 124 *ap->a_vpp = NULL; 125 return (ENOTDIR); 126 } 127 128 /* 129 * Open a special file. 130 */ 131 /* ARGSUSED */ 132 spec_open(ap) 133 struct vop_open_args /* { 134 struct vnode *a_vp; 135 int a_mode; 136 struct ucred *a_cred; 137 struct proc *a_p; 138 } */ *ap; 139 { 140 struct vnode *bvp, *vp = ap->a_vp; 141 dev_t bdev, dev = (dev_t)vp->v_rdev; 142 register int maj = major(dev); 143 int error; 144 145 /* 146 * Don't allow open if fs is mounted -nodev. 147 */ 148 if (vp->v_mount && (vp->v_mount->mnt_flag & MNT_NODEV)) 149 return (ENXIO); 150 151 switch (vp->v_type) { 152 153 case VCHR: 154 if ((u_int)maj >= nchrdev) 155 return (ENXIO); 156 if (ap->a_cred != FSCRED && (ap->a_mode & FWRITE)) { 157 /* 158 * When running in very secure mode, do not allow 159 * opens for writing of any disk character devices. 160 */ 161 if (securelevel >= 2 && cdevsw[maj].d_type == D_DISK) 162 return (EPERM); 163 /* 164 * When running in secure mode, do not allow opens 165 * for writing of /dev/mem, /dev/kmem, or character 166 * devices whose corresponding block devices are 167 * currently mounted. 168 */ 169 if (securelevel >= 1) { 170 if ((bdev = chrtoblk(dev)) != NODEV && 171 vfinddev(bdev, VBLK, &bvp) && 172 bvp->v_usecount > 0 && 173 (error = vfs_mountedon(bvp))) 174 return (error); 175 if (iskmemdev(dev)) 176 return (EPERM); 177 } 178 } 179 if (cdevsw[maj].d_type == D_TTY) 180 vp->v_flag |= VISTTY; 181 VOP_UNLOCK(vp); 182 error = (*cdevsw[maj].d_open)(dev, ap->a_mode, S_IFCHR, ap->a_p); 183 VOP_LOCK(vp); 184 return (error); 185 186 case VBLK: 187 if ((u_int)maj >= nblkdev) 188 return (ENXIO); 189 /* 190 * When running in very secure mode, do not allow 191 * opens for writing of any disk block devices. 192 */ 193 if (securelevel >= 2 && ap->a_cred != FSCRED && 194 (ap->a_mode & FWRITE) && bdevsw[maj].d_type == D_DISK) 195 return (EPERM); 196 /* 197 * Do not allow opens of block devices that are 198 * currently mounted. 199 */ 200 if (error = vfs_mountedon(vp)) 201 return (error); 202 return ((*bdevsw[maj].d_open)(dev, ap->a_mode, S_IFBLK, ap->a_p)); 203 } 204 return (0); 205 } 206 207 /* 208 * Vnode op for read 209 */ 210 /* ARGSUSED */ 211 spec_read(ap) 212 struct vop_read_args /* { 213 struct vnode *a_vp; 214 struct uio *a_uio; 215 int a_ioflag; 216 struct ucred *a_cred; 217 } */ *ap; 218 { 219 register struct vnode *vp = ap->a_vp; 220 register struct uio *uio = ap->a_uio; 221 struct proc *p = uio->uio_procp; 222 struct buf *bp; 223 daddr_t bn, nextbn; 224 long bsize, bscale, ssize; 225 struct partinfo dpart; 226 int n, on, majordev, (*ioctl)(); 227 int error = 0; 228 229 #ifdef DIAGNOSTIC 230 if (uio->uio_rw != UIO_READ) 231 panic("spec_read mode"); 232 if (uio->uio_segflg == UIO_USERSPACE && uio->uio_procp != curproc) 233 panic("spec_read proc"); 234 #endif 235 if (uio->uio_resid == 0) 236 return (0); 237 238 switch (vp->v_type) { 239 240 case VCHR: 241 VOP_UNLOCK(vp); 242 error = (*cdevsw[major(vp->v_rdev)].d_read) 243 (vp->v_rdev, uio, ap->a_ioflag); 244 VOP_LOCK(vp); 245 return (error); 246 247 case VBLK: 248 if (uio->uio_resid == 0) 249 return (0); 250 if (uio->uio_offset < 0) 251 return (EINVAL); 252 bsize = BLKDEV_IOSIZE; 253 ssize = DEV_BSIZE; 254 if ((majordev = major(vp->v_rdev)) < nblkdev && 255 (ioctl = bdevsw[majordev].d_ioctl) != NULL && 256 (*ioctl)(vp->v_rdev, DIOCGPART, (caddr_t)&dpart, FREAD, p) == 0) { 257 if (dpart.part->p_fstype == FS_BSDFFS && 258 dpart.part->p_frag != 0 && dpart.part->p_fsize != 0) 259 bsize = dpart.part->p_frag * 260 dpart.part->p_fsize; 261 if (dpart.disklab->d_secsize != 0) 262 ssize = dpart.disklab->d_secsize; 263 } 264 bscale = bsize / ssize; 265 do { 266 bn = (uio->uio_offset / ssize) &~ (bscale - 1); 267 on = uio->uio_offset % bsize; 268 n = min((unsigned)(bsize - on), uio->uio_resid); 269 if (vp->v_lastr + bscale == bn) { 270 nextbn = bn + bscale; 271 error = breadn(vp, bn, (int)bsize, &nextbn, 272 (int *)&bsize, 1, NOCRED, &bp); 273 } else 274 error = bread(vp, bn, (int)bsize, NOCRED, &bp); 275 vp->v_lastr = bn; 276 n = min(n, bsize - bp->b_resid); 277 if (error) { 278 brelse(bp); 279 return (error); 280 } 281 error = uiomove((char *)bp->b_data + on, n, uio); 282 if (n + on == bsize) 283 bp->b_flags |= B_AGE; 284 brelse(bp); 285 } while (error == 0 && uio->uio_resid > 0 && n != 0); 286 return (error); 287 288 default: 289 panic("spec_read type"); 290 } 291 /* NOTREACHED */ 292 } 293 294 /* 295 * Vnode op for write 296 */ 297 /* ARGSUSED */ 298 spec_write(ap) 299 struct vop_write_args /* { 300 struct vnode *a_vp; 301 struct uio *a_uio; 302 int a_ioflag; 303 struct ucred *a_cred; 304 } */ *ap; 305 { 306 register struct vnode *vp = ap->a_vp; 307 register struct uio *uio = ap->a_uio; 308 struct proc *p = uio->uio_procp; 309 struct buf *bp; 310 daddr_t bn; 311 long bsize, bscale, ssize; 312 struct partinfo dpart; 313 int n, on, majordev, (*ioctl)(); 314 int error = 0; 315 316 #ifdef DIAGNOSTIC 317 if (uio->uio_rw != UIO_WRITE) 318 panic("spec_write mode"); 319 if (uio->uio_segflg == UIO_USERSPACE && uio->uio_procp != curproc) 320 panic("spec_write proc"); 321 #endif 322 323 switch (vp->v_type) { 324 325 case VCHR: 326 VOP_UNLOCK(vp); 327 error = (*cdevsw[major(vp->v_rdev)].d_write) 328 (vp->v_rdev, uio, ap->a_ioflag); 329 VOP_LOCK(vp); 330 return (error); 331 332 case VBLK: 333 if (uio->uio_resid == 0) 334 return (0); 335 if (uio->uio_offset < 0) 336 return (EINVAL); 337 bsize = BLKDEV_IOSIZE; 338 ssize = DEV_BSIZE; 339 if ((majordev = major(vp->v_rdev)) < nblkdev && 340 (ioctl = bdevsw[majordev].d_ioctl) != NULL && 341 (*ioctl)(vp->v_rdev, DIOCGPART, (caddr_t)&dpart, FREAD, p) == 0) { 342 if (dpart.part->p_fstype == FS_BSDFFS && 343 dpart.part->p_frag != 0 && dpart.part->p_fsize != 0) 344 bsize = dpart.part->p_frag * 345 dpart.part->p_fsize; 346 if (dpart.disklab->d_secsize != 0) 347 ssize = dpart.disklab->d_secsize; 348 } 349 bscale = bsize / ssize; 350 do { 351 bn = (uio->uio_offset / ssize) &~ (bscale - 1); 352 on = uio->uio_offset % bsize; 353 n = min((unsigned)(bsize - on), uio->uio_resid); 354 if (n == bsize) 355 bp = getblk(vp, bn, bsize, 0, 0); 356 else 357 error = bread(vp, bn, bsize, NOCRED, &bp); 358 n = min(n, bsize - bp->b_resid); 359 if (error) { 360 brelse(bp); 361 return (error); 362 } 363 error = uiomove((char *)bp->b_data + on, n, uio); 364 if (n + on == bsize) { 365 bp->b_flags |= B_AGE; 366 bawrite(bp); 367 } else 368 bdwrite(bp); 369 } while (error == 0 && uio->uio_resid > 0 && n != 0); 370 return (error); 371 372 default: 373 panic("spec_write type"); 374 } 375 /* NOTREACHED */ 376 } 377 378 /* 379 * Device ioctl operation. 380 */ 381 /* ARGSUSED */ 382 spec_ioctl(ap) 383 struct vop_ioctl_args /* { 384 struct vnode *a_vp; 385 u_long a_command; 386 caddr_t a_data; 387 int a_fflag; 388 struct ucred *a_cred; 389 struct proc *a_p; 390 } */ *ap; 391 { 392 dev_t dev = ap->a_vp->v_rdev; 393 int maj = major(dev); 394 395 switch (ap->a_vp->v_type) { 396 397 case VCHR: 398 return ((*cdevsw[maj].d_ioctl)(dev, ap->a_command, ap->a_data, 399 ap->a_fflag, ap->a_p)); 400 401 case VBLK: 402 if (ap->a_command == 0 && (long)ap->a_data == B_TAPE) 403 if (bdevsw[maj].d_type == D_TAPE) 404 return (0); 405 else 406 return (1); 407 return ((*bdevsw[maj].d_ioctl)(dev, ap->a_command, ap->a_data, 408 ap->a_fflag, ap->a_p)); 409 410 default: 411 panic("spec_ioctl"); 412 /* NOTREACHED */ 413 } 414 } 415 416 /* ARGSUSED */ 417 spec_select(ap) 418 struct vop_select_args /* { 419 struct vnode *a_vp; 420 int a_which; 421 int a_fflags; 422 struct ucred *a_cred; 423 struct proc *a_p; 424 } */ *ap; 425 { 426 register dev_t dev; 427 428 switch (ap->a_vp->v_type) { 429 430 default: 431 return (1); /* XXX */ 432 433 case VCHR: 434 dev = ap->a_vp->v_rdev; 435 return (*cdevsw[major(dev)].d_select)(dev, ap->a_which, ap->a_p); 436 } 437 } 438 /* 439 * Synch buffers associated with a block device 440 */ 441 /* ARGSUSED */ 442 int 443 spec_fsync(ap) 444 struct vop_fsync_args /* { 445 struct vnode *a_vp; 446 struct ucred *a_cred; 447 int a_waitfor; 448 struct proc *a_p; 449 } */ *ap; 450 { 451 register struct vnode *vp = ap->a_vp; 452 register struct buf *bp; 453 struct buf *nbp; 454 int s; 455 456 if (vp->v_type == VCHR) 457 return (0); 458 /* 459 * Flush all dirty buffers associated with a block device. 460 */ 461 loop: 462 s = splbio(); 463 for (bp = vp->v_dirtyblkhd.lh_first; bp; bp = nbp) { 464 nbp = bp->b_vnbufs.le_next; 465 if ((bp->b_flags & B_BUSY)) 466 continue; 467 if ((bp->b_flags & B_DELWRI) == 0) 468 panic("spec_fsync: not dirty"); 469 bremfree(bp); 470 bp->b_flags |= B_BUSY; 471 splx(s); 472 bawrite(bp); 473 goto loop; 474 } 475 if (ap->a_waitfor == MNT_WAIT) { 476 while (vp->v_numoutput) { 477 vp->v_flag |= VBWAIT; 478 sleep((caddr_t)&vp->v_numoutput, PRIBIO + 1); 479 } 480 #ifdef DIAGNOSTIC 481 if (vp->v_dirtyblkhd.lh_first) { 482 vprint("spec_fsync: dirty", vp); 483 goto loop; 484 } 485 #endif 486 } 487 splx(s); 488 return (0); 489 } 490 491 /* 492 * Just call the device strategy routine 493 */ 494 spec_strategy(ap) 495 struct vop_strategy_args /* { 496 struct buf *a_bp; 497 } */ *ap; 498 { 499 500 (*bdevsw[major(ap->a_bp->b_dev)].d_strategy)(ap->a_bp); 501 return (0); 502 } 503 504 /* 505 * This is a noop, simply returning what one has been given. 506 */ 507 spec_bmap(ap) 508 struct vop_bmap_args /* { 509 struct vnode *a_vp; 510 daddr_t a_bn; 511 struct vnode **a_vpp; 512 daddr_t *a_bnp; 513 } */ *ap; 514 { 515 516 if (ap->a_vpp != NULL) 517 *ap->a_vpp = ap->a_vp; 518 if (ap->a_bnp != NULL) 519 *ap->a_bnp = ap->a_bn; 520 return (0); 521 } 522 523 /* 524 * At the moment we do not do any locking. 525 */ 526 /* ARGSUSED */ 527 spec_lock(ap) 528 struct vop_lock_args /* { 529 struct vnode *a_vp; 530 } */ *ap; 531 { 532 533 return (0); 534 } 535 536 /* ARGSUSED */ 537 spec_unlock(ap) 538 struct vop_unlock_args /* { 539 struct vnode *a_vp; 540 } */ *ap; 541 { 542 543 return (0); 544 } 545 546 /* 547 * Device close routine 548 */ 549 /* ARGSUSED */ 550 spec_close(ap) 551 struct vop_close_args /* { 552 struct vnode *a_vp; 553 int a_fflag; 554 struct ucred *a_cred; 555 struct proc *a_p; 556 } */ *ap; 557 { 558 register struct vnode *vp = ap->a_vp; 559 dev_t dev = vp->v_rdev; 560 int (*devclose) __P((dev_t, int, int, struct proc *)); 561 int mode, error; 562 563 switch (vp->v_type) { 564 565 case VCHR: 566 /* 567 * Hack: a tty device that is a controlling terminal 568 * has a reference from the session structure. 569 * We cannot easily tell that a character device is 570 * a controlling terminal, unless it is the closing 571 * process' controlling terminal. In that case, 572 * if the reference count is 2 (this last descriptor 573 * plus the session), release the reference from the session. 574 */ 575 if (vcount(vp) == 2 && ap->a_p && 576 vp == ap->a_p->p_session->s_ttyvp) { 577 vrele(vp); 578 ap->a_p->p_session->s_ttyvp = NULL; 579 } 580 /* 581 * If the vnode is locked, then we are in the midst 582 * of forcably closing the device, otherwise we only 583 * close on last reference. 584 */ 585 if (vcount(vp) > 1 && (vp->v_flag & VXLOCK) == 0) 586 return (0); 587 devclose = cdevsw[major(dev)].d_close; 588 mode = S_IFCHR; 589 break; 590 591 case VBLK: 592 /* 593 * On last close of a block device (that isn't mounted) 594 * we must invalidate any in core blocks, so that 595 * we can, for instance, change floppy disks. 596 */ 597 if (error = vinvalbuf(vp, V_SAVE, ap->a_cred, ap->a_p, 0, 0)) 598 return (error); 599 /* 600 * We do not want to really close the device if it 601 * is still in use unless we are trying to close it 602 * forcibly. Since every use (buffer, vnode, swap, cmap) 603 * holds a reference to the vnode, and because we mark 604 * any other vnodes that alias this device, when the 605 * sum of the reference counts on all the aliased 606 * vnodes descends to one, we are on last close. 607 */ 608 if (vcount(vp) > 1 && (vp->v_flag & VXLOCK) == 0) 609 return (0); 610 devclose = bdevsw[major(dev)].d_close; 611 mode = S_IFBLK; 612 break; 613 614 default: 615 panic("spec_close: not special"); 616 } 617 618 return ((*devclose)(dev, ap->a_fflag, mode, ap->a_p)); 619 } 620 621 /* 622 * Print out the contents of a special device vnode. 623 */ 624 spec_print(ap) 625 struct vop_print_args /* { 626 struct vnode *a_vp; 627 } */ *ap; 628 { 629 630 printf("tag VT_NON, dev %d, %d\n", major(ap->a_vp->v_rdev), 631 minor(ap->a_vp->v_rdev)); 632 } 633 634 /* 635 * Return POSIX pathconf information applicable to special devices. 636 */ 637 spec_pathconf(ap) 638 struct vop_pathconf_args /* { 639 struct vnode *a_vp; 640 int a_name; 641 register_t *a_retval; 642 } */ *ap; 643 { 644 645 switch (ap->a_name) { 646 case _PC_LINK_MAX: 647 *ap->a_retval = LINK_MAX; 648 return (0); 649 case _PC_MAX_CANON: 650 *ap->a_retval = MAX_CANON; 651 return (0); 652 case _PC_MAX_INPUT: 653 *ap->a_retval = MAX_INPUT; 654 return (0); 655 case _PC_PIPE_BUF: 656 *ap->a_retval = PIPE_BUF; 657 return (0); 658 case _PC_CHOWN_RESTRICTED: 659 *ap->a_retval = 1; 660 return (0); 661 case _PC_VDISABLE: 662 *ap->a_retval = _POSIX_VDISABLE; 663 return (0); 664 default: 665 return (EINVAL); 666 } 667 /* NOTREACHED */ 668 } 669 670 /* 671 * Special device advisory byte-level locks. 672 */ 673 /* ARGSUSED */ 674 spec_advlock(ap) 675 struct vop_advlock_args /* { 676 struct vnode *a_vp; 677 caddr_t a_id; 678 int a_op; 679 struct flock *a_fl; 680 int a_flags; 681 } */ *ap; 682 { 683 684 return (EOPNOTSUPP); 685 } 686 687 /* 688 * Special device failed operation 689 */ 690 spec_ebadf() 691 { 692 693 return (EBADF); 694 } 695 696 /* 697 * Special device bad operation 698 */ 699 spec_badop() 700 { 701 702 panic("spec_badop called"); 703 /* NOTREACHED */ 704 } 705
Indexes created Tue Sep 23 20:09:58 GMT 2025