1 /* 2 * Copyright (c) 2000-2004 3 * Poul-Henning Kamp. All rights reserved. 4 * Copyright (c) 1989, 1992-1993, 1995 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software donated to Berkeley by 8 * Jan-Simon Pendry. 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. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 * @(#)kernfs_vnops.c 8.15 (Berkeley) 5/21/95 32 * From: FreeBSD: src/sys/miscfs/kernfs/kernfs_vnops.c 1.43 33 * 34 * $FreeBSD$ 35 */ 36 37 /* 38 * TODO: 39 * remove empty directories 40 * mknod: hunt down DE_DELETED, compare name, reinstantiate. 41 * mkdir: want it ? 42 */ 43 44 #include <opt_devfs.h> 45 #include <opt_mac.h> 46 47 #include <sys/param.h> 48 #include <sys/systm.h> 49 #include <sys/conf.h> 50 #include <sys/dirent.h> 51 #include <sys/fcntl.h> 52 #include <sys/file.h> 53 #include <sys/filedesc.h> 54 #include <sys/filio.h> 55 #include <sys/kernel.h> 56 #include <sys/lock.h> 57 #include <sys/mac.h> 58 #include <sys/malloc.h> 59 #include <sys/mount.h> 60 #include <sys/namei.h> 61 #include <sys/proc.h> 62 #include <sys/stat.h> 63 #include <sys/sx.h> 64 #include <sys/time.h> 65 #include <sys/ttycom.h> 66 #include <sys/unistd.h> 67 #include <sys/vnode.h> 68 69 #include <fs/devfs/devfs.h> 70 71 static fo_rdwr_t devfs_read_f; 72 static fo_rdwr_t devfs_write_f; 73 static fo_ioctl_t devfs_ioctl_f; 74 static fo_poll_t devfs_poll_f; 75 static fo_kqfilter_t devfs_kqfilter_f; 76 static fo_stat_t devfs_stat_f; 77 static fo_close_t devfs_close_f; 78 79 struct fileops devfs_ops_f = { 80 .fo_read = devfs_read_f, 81 .fo_write = devfs_write_f, 82 .fo_ioctl = devfs_ioctl_f, 83 .fo_poll = devfs_poll_f, 84 .fo_kqfilter = devfs_kqfilter_f, 85 .fo_stat = devfs_stat_f, 86 .fo_close = devfs_close_f, 87 .fo_flags = DFLAG_PASSABLE | DFLAG_SEEKABLE 88 }; 89 90 static vop_access_t devfs_access; 91 static vop_advlock_t devfs_advlock; 92 static vop_close_t devfs_close; 93 static vop_fsync_t devfs_fsync; 94 static vop_getattr_t devfs_getattr; 95 static vop_lookup_t devfs_lookupx; 96 static vop_mknod_t devfs_mknod; 97 static vop_open_t devfs_open; 98 static vop_pathconf_t devfs_pathconf; 99 static vop_print_t devfs_print; 100 static vop_readdir_t devfs_readdir; 101 static vop_readlink_t devfs_readlink; 102 static vop_reclaim_t devfs_reclaim; 103 static vop_remove_t devfs_remove; 104 static vop_revoke_t devfs_revoke; 105 static vop_ioctl_t devfs_rioctl; 106 static vop_read_t devfs_rread; 107 static vop_setattr_t devfs_setattr; 108 #ifdef MAC 109 static vop_setlabel_t devfs_setlabel; 110 #endif 111 static vop_symlink_t devfs_symlink; 112 113 extern struct vop_vector devfs_vnodeops; 114 115 static int 116 devfs_fp_check(struct file *fp, struct cdev **devp, struct cdevsw **dswp) 117 { 118 119 *devp = fp->f_vnode->v_rdev; 120 if (*devp != fp->f_data) 121 return (ENXIO); 122 KASSERT((*devp)->si_refcount > 0, 123 ("devfs: un-referenced struct cdev *(%s)", devtoname(*devp))); 124 *dswp = dev_refthread(*devp); 125 if (*dswp == NULL) 126 return (ENXIO); 127 return (0); 128 } 129 130 /* 131 * Construct the fully qualified path name relative to the mountpoint 132 */ 133 static char * 134 devfs_fqpn(char *buf, struct vnode *dvp, struct componentname *cnp) 135 { 136 int i; 137 struct devfs_dirent *de, *dd; 138 struct devfs_mount *dmp; 139 140 dmp = VFSTODEVFS(dvp->v_mount); 141 dd = dvp->v_data; 142 i = SPECNAMELEN; 143 buf[i] = '\0'; 144 i -= cnp->cn_namelen; 145 if (i < 0) 146 return (NULL); 147 bcopy(cnp->cn_nameptr, buf + i, cnp->cn_namelen); 148 de = dd; 149 while (de != dmp->dm_basedir) { 150 i--; 151 if (i < 0) 152 return (NULL); 153 buf[i] = '/'; 154 i -= de->de_dirent->d_namlen; 155 if (i < 0) 156 return (NULL); 157 bcopy(de->de_dirent->d_name, buf + i, 158 de->de_dirent->d_namlen); 159 de = TAILQ_FIRST(&de->de_dlist); /* "." */ 160 de = TAILQ_NEXT(de, de_list); /* ".." */ 161 de = de->de_dir; 162 } 163 return (buf + i); 164 } 165 166 int 167 devfs_allocv(struct devfs_dirent *de, struct mount *mp, struct vnode **vpp, struct thread *td) 168 { 169 int error; 170 struct vnode *vp; 171 struct cdev *dev; 172 173 KASSERT(td == curthread, ("devfs_allocv: td != curthread")); 174 loop: 175 vp = de->de_vnode; 176 if (vp != NULL) { 177 if (vget(vp, LK_EXCLUSIVE, td)) 178 goto loop; 179 *vpp = vp; 180 return (0); 181 } 182 if (de->de_dirent->d_type == DT_CHR) { 183 dev = *devfs_itod(de->de_inode); 184 if (dev == NULL) 185 return (ENOENT); 186 } else { 187 dev = NULL; 188 } 189 error = getnewvnode("devfs", mp, &devfs_vnodeops, &vp); 190 if (error != 0) { 191 printf("devfs_allocv: failed to allocate new vnode\n"); 192 return (error); 193 } 194 195 if (de->de_dirent->d_type == DT_CHR) { 196 vp->v_type = VCHR; 197 vp = addaliasu(vp, dev->si_udev); 198 vp->v_op = &devfs_specops; 199 } else if (de->de_dirent->d_type == DT_DIR) { 200 vp->v_type = VDIR; 201 } else if (de->de_dirent->d_type == DT_LNK) { 202 vp->v_type = VLNK; 203 } else { 204 vp->v_type = VBAD; 205 } 206 vp->v_data = de; 207 de->de_vnode = vp; 208 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, td); 209 #ifdef MAC 210 mac_associate_vnode_devfs(mp, de, vp); 211 #endif 212 *vpp = vp; 213 return (0); 214 } 215 216 static int 217 devfs_access(ap) 218 struct vop_access_args /* { 219 struct vnode *a_vp; 220 int a_mode; 221 struct ucred *a_cred; 222 struct thread *a_td; 223 } */ *ap; 224 { 225 struct vnode *vp = ap->a_vp; 226 struct devfs_dirent *de; 227 int error; 228 229 de = vp->v_data; 230 if (vp->v_type == VDIR) 231 de = de->de_dir; 232 233 error = vaccess(vp->v_type, de->de_mode, de->de_uid, de->de_gid, 234 ap->a_mode, ap->a_cred, NULL); 235 if (!error) 236 return (error); 237 if (error != EACCES) 238 return (error); 239 /* We do, however, allow access to the controlling terminal */ 240 if (!(ap->a_td->td_proc->p_flag & P_CONTROLT)) 241 return (error); 242 if (ap->a_td->td_proc->p_session->s_ttyvp == de->de_vnode) 243 return (0); 244 return (error); 245 } 246 247 /* 248 * Special device advisory byte-level locks. 249 */ 250 /* ARGSUSED */ 251 static int 252 devfs_advlock(ap) 253 struct vop_advlock_args /* { 254 struct vnode *a_vp; 255 caddr_t a_id; 256 int a_op; 257 struct flock *a_fl; 258 int a_flags; 259 } */ *ap; 260 { 261 262 return (ap->a_flags & F_FLOCK ? EOPNOTSUPP : EINVAL); 263 } 264 265 /* 266 * Device close routine 267 */ 268 /* ARGSUSED */ 269 static int 270 devfs_close(ap) 271 struct vop_close_args /* { 272 struct vnode *a_vp; 273 int a_fflag; 274 struct ucred *a_cred; 275 struct thread *a_td; 276 } */ *ap; 277 { 278 struct vnode *vp = ap->a_vp, *oldvp; 279 struct thread *td = ap->a_td; 280 struct cdev *dev = vp->v_rdev; 281 struct cdevsw *dsw; 282 int error; 283 284 /* 285 * Hack: a tty device that is a controlling terminal 286 * has a reference from the session structure. 287 * We cannot easily tell that a character device is 288 * a controlling terminal, unless it is the closing 289 * process' controlling terminal. In that case, 290 * if the reference count is 2 (this last descriptor 291 * plus the session), release the reference from the session. 292 */ 293 294 /* 295 * This needs to be rewritten to take the vp interlock into 296 * consideration. 297 */ 298 299 oldvp = NULL; 300 sx_xlock(&proctree_lock); 301 if (td && vp == td->td_proc->p_session->s_ttyvp) { 302 SESS_LOCK(td->td_proc->p_session); 303 VI_LOCK(vp); 304 if (count_dev(dev) == 2 && (vp->v_iflag & VI_XLOCK) == 0) { 305 td->td_proc->p_session->s_ttyvp = NULL; 306 oldvp = vp; 307 } 308 VI_UNLOCK(vp); 309 SESS_UNLOCK(td->td_proc->p_session); 310 } 311 sx_xunlock(&proctree_lock); 312 if (oldvp != NULL) 313 vrele(oldvp); 314 /* 315 * We do not want to really close the device if it 316 * is still in use unless we are trying to close it 317 * forcibly. Since every use (buffer, vnode, swap, cmap) 318 * holds a reference to the vnode, and because we mark 319 * any other vnodes that alias this device, when the 320 * sum of the reference counts on all the aliased 321 * vnodes descends to one, we are on last close. 322 */ 323 dsw = dev_refthread(dev); 324 if (dsw == NULL) 325 return (ENXIO); 326 VI_LOCK(vp); 327 if (vp->v_iflag & VI_XLOCK) { 328 /* Forced close. */ 329 } else if (dsw->d_flags & D_TRACKCLOSE) { 330 /* Keep device updated on status. */ 331 } else if (count_dev(dev) > 1) { 332 VI_UNLOCK(vp); 333 dev_relthread(dev); 334 return (0); 335 } 336 VI_UNLOCK(vp); 337 KASSERT(dev->si_refcount > 0, 338 ("devfs_close() on un-referenced struct cdev *(%s)", devtoname(dev))); 339 if (!(dsw->d_flags & D_NEEDGIANT)) { 340 DROP_GIANT(); 341 error = dsw->d_close(dev, ap->a_fflag, S_IFCHR, td); 342 PICKUP_GIANT(); 343 } else 344 error = dsw->d_close(dev, ap->a_fflag, S_IFCHR, td); 345 dev_relthread(dev); 346 return (error); 347 } 348 349 static int 350 devfs_close_f(struct file *fp, struct thread *td) 351 { 352 353 return (vnops.fo_close(fp, td)); 354 } 355 356 /* 357 * Synch buffers associated with a block device 358 */ 359 /* ARGSUSED */ 360 static int 361 devfs_fsync(ap) 362 struct vop_fsync_args /* { 363 struct vnode *a_vp; 364 struct ucred *a_cred; 365 int a_waitfor; 366 struct thread *a_td; 367 } */ *ap; 368 { 369 if (!vn_isdisk(ap->a_vp, NULL)) 370 return (0); 371 372 return (vop_stdfsync(ap)); 373 } 374 375 static int 376 devfs_getattr(ap) 377 struct vop_getattr_args /* { 378 struct vnode *a_vp; 379 struct vattr *a_vap; 380 struct ucred *a_cred; 381 struct thread *a_td; 382 } */ *ap; 383 { 384 struct vnode *vp = ap->a_vp; 385 struct vattr *vap = ap->a_vap; 386 int error = 0; 387 struct devfs_dirent *de; 388 struct cdev *dev; 389 390 de = vp->v_data; 391 if (vp->v_type == VDIR) 392 de = de->de_dir; 393 bzero((caddr_t) vap, sizeof(*vap)); 394 vattr_null(vap); 395 vap->va_uid = de->de_uid; 396 vap->va_gid = de->de_gid; 397 vap->va_mode = de->de_mode; 398 if (vp->v_type == VLNK) 399 vap->va_size = strlen(de->de_symlink); 400 else if (vp->v_type == VDIR) 401 vap->va_size = vap->va_bytes = DEV_BSIZE; 402 else 403 vap->va_size = 0; 404 if (vp->v_type != VDIR) 405 vap->va_bytes = 0; 406 vap->va_blocksize = DEV_BSIZE; 407 vap->va_type = vp->v_type; 408 409 #define fix(aa) \ 410 do { \ 411 if ((aa).tv_sec == 0) { \ 412 (aa).tv_sec = boottime.tv_sec; \ 413 (aa).tv_nsec = boottime.tv_usec * 1000; \ 414 } \ 415 } while (0) 416 417 if (vp->v_type != VCHR) { 418 fix(de->de_atime); 419 vap->va_atime = de->de_atime; 420 fix(de->de_mtime); 421 vap->va_mtime = de->de_mtime; 422 fix(de->de_ctime); 423 vap->va_ctime = de->de_ctime; 424 } else { 425 dev = vp->v_rdev; 426 fix(dev->si_atime); 427 vap->va_atime = dev->si_atime; 428 fix(dev->si_mtime); 429 vap->va_mtime = dev->si_mtime; 430 fix(dev->si_ctime); 431 vap->va_ctime = dev->si_ctime; 432 vap->va_rdev = dev->si_udev; 433 } 434 vap->va_gen = 0; 435 vap->va_flags = 0; 436 vap->va_nlink = de->de_links; 437 vap->va_fileid = de->de_inode; 438 439 return (error); 440 } 441 442 /* 443 * Device ioctl operation. 444 */ 445 /* ARGSUSED */ 446 static int 447 devfs_ioctl_f(struct file *fp, u_long com, void *data, struct ucred *cred, struct thread *td) 448 { 449 struct cdev *dev; 450 struct cdevsw *dsw; 451 struct vnode *vp; 452 struct vnode *vpold; 453 int error; 454 455 error = devfs_fp_check(fp, &dev, &dsw); 456 if (error) 457 return (error); 458 459 if (com == FIODTYPE) { 460 *(int *)data = dsw->d_flags & D_TYPEMASK; 461 dev_relthread(dev); 462 return (0); 463 } 464 if (dsw->d_flags & D_NEEDGIANT) 465 mtx_lock(&Giant); 466 error = dsw->d_ioctl(dev, com, data, fp->f_flag, td); 467 if (dsw->d_flags & D_NEEDGIANT) 468 mtx_unlock(&Giant); 469 dev_relthread(dev); 470 if (error == ENOIOCTL) 471 error = ENOTTY; 472 if (error == 0 && com == TIOCSCTTY) { 473 vp = fp->f_vnode; 474 475 /* Do nothing if reassigning same control tty */ 476 sx_slock(&proctree_lock); 477 if (td->td_proc->p_session->s_ttyvp == vp) { 478 sx_sunlock(&proctree_lock); 479 return (0); 480 } 481 482 mtx_lock(&Giant); 483 484 vpold = td->td_proc->p_session->s_ttyvp; 485 VREF(vp); 486 SESS_LOCK(td->td_proc->p_session); 487 td->td_proc->p_session->s_ttyvp = vp; 488 SESS_UNLOCK(td->td_proc->p_session); 489 490 sx_sunlock(&proctree_lock); 491 492 /* Get rid of reference to old control tty */ 493 if (vpold) 494 vrele(vpold); 495 mtx_unlock(&Giant); 496 } 497 return (error); 498 } 499 500 501 /* ARGSUSED */ 502 static int 503 devfs_kqfilter_f(struct file *fp, struct knote *kn) 504 { 505 struct cdev *dev; 506 struct cdevsw *dsw; 507 int error; 508 509 error = devfs_fp_check(fp, &dev, &dsw); 510 if (error) 511 return (error); 512 if (dsw->d_flags & D_NEEDGIANT) 513 mtx_lock(&Giant); 514 error = dsw->d_kqfilter(dev, kn); 515 if (dsw->d_flags & D_NEEDGIANT) 516 mtx_unlock(&Giant); 517 dev_relthread(dev); 518 return (error); 519 } 520 521 static int 522 devfs_lookupx(ap) 523 struct vop_lookup_args /* { 524 struct vnode * a_dvp; 525 struct vnode ** a_vpp; 526 struct componentname * a_cnp; 527 } */ *ap; 528 { 529 struct componentname *cnp; 530 struct vnode *dvp, **vpp; 531 struct thread *td; 532 struct devfs_dirent *de, *dd; 533 struct devfs_dirent **dde; 534 struct devfs_mount *dmp; 535 struct cdev *cdev; 536 int error, flags, nameiop; 537 char specname[SPECNAMELEN + 1], *pname; 538 539 cnp = ap->a_cnp; 540 vpp = ap->a_vpp; 541 dvp = ap->a_dvp; 542 pname = cnp->cn_nameptr; 543 td = cnp->cn_thread; 544 flags = cnp->cn_flags; 545 nameiop = cnp->cn_nameiop; 546 dmp = VFSTODEVFS(dvp->v_mount); 547 dd = dvp->v_data; 548 549 *vpp = NULLVP; 550 cnp->cn_flags &= ~PDIRUNLOCK; 551 552 if ((flags & ISLASTCN) && nameiop == RENAME) 553 return (EOPNOTSUPP); 554 555 if (dvp->v_type != VDIR) 556 return (ENOTDIR); 557 558 if ((flags & ISDOTDOT) && (dvp->v_vflag & VV_ROOT)) 559 return (EIO); 560 561 error = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred, td); 562 if (error) 563 return (error); 564 565 if (cnp->cn_namelen == 1 && *pname == '.') { 566 if ((flags & ISLASTCN) && nameiop != LOOKUP) 567 return (EINVAL); 568 *vpp = dvp; 569 VREF(dvp); 570 return (0); 571 } 572 573 if (flags & ISDOTDOT) { 574 if ((flags & ISLASTCN) && nameiop != LOOKUP) 575 return (EINVAL); 576 VOP_UNLOCK(dvp, 0, td); 577 cnp->cn_flags |= PDIRUNLOCK; 578 de = TAILQ_FIRST(&dd->de_dlist); /* "." */ 579 de = TAILQ_NEXT(de, de_list); /* ".." */ 580 de = de->de_dir; 581 error = devfs_allocv(de, dvp->v_mount, vpp, td); 582 if (error || ((flags & LOCKPARENT) && (flags & ISLASTCN))) { 583 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY, td); 584 cnp->cn_flags &= ~PDIRUNLOCK; 585 } 586 return (error); 587 } 588 589 devfs_populate(dmp); 590 dd = dvp->v_data; 591 TAILQ_FOREACH(de, &dd->de_dlist, de_list) { 592 if (cnp->cn_namelen != de->de_dirent->d_namlen) 593 continue; 594 if (bcmp(cnp->cn_nameptr, de->de_dirent->d_name, 595 de->de_dirent->d_namlen) != 0) 596 continue; 597 if (de->de_flags & DE_WHITEOUT) 598 goto notfound; 599 goto found; 600 } 601 602 if (nameiop == DELETE) 603 goto notfound; 604 605 /* 606 * OK, we didn't have an entry for the name we were asked for 607 * so we try to see if anybody can create it on demand. 608 */ 609 pname = devfs_fqpn(specname, dvp, cnp); 610 if (pname == NULL) 611 goto notfound; 612 613 cdev = NULL; 614 EVENTHANDLER_INVOKE(dev_clone, pname, strlen(pname), &cdev); 615 if (cdev == NULL) 616 goto notfound; 617 618 devfs_populate(dmp); 619 620 dde = devfs_itode(dmp, cdev->si_inode); 621 622 if (dde == NULL || *dde == NULL || *dde == DE_DELETED) 623 goto notfound; 624 625 if ((*dde)->de_flags & DE_WHITEOUT) 626 goto notfound; 627 628 de = *dde; 629 goto found; 630 631 notfound: 632 633 if ((nameiop == CREATE || nameiop == RENAME) && 634 (flags & (LOCKPARENT | WANTPARENT)) && (flags & ISLASTCN)) { 635 cnp->cn_flags |= SAVENAME; 636 if (!(flags & LOCKPARENT)) { 637 VOP_UNLOCK(dvp, 0, td); 638 cnp->cn_flags |= PDIRUNLOCK; 639 } 640 return (EJUSTRETURN); 641 } 642 return (ENOENT); 643 644 645 found: 646 647 if ((cnp->cn_nameiop == DELETE) && (flags & ISLASTCN)) { 648 error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred, td); 649 if (error) 650 return (error); 651 if (*vpp == dvp) { 652 VREF(dvp); 653 *vpp = dvp; 654 return (0); 655 } 656 error = devfs_allocv(de, dvp->v_mount, vpp, td); 657 if (error) 658 return (error); 659 if (!(flags & LOCKPARENT)) { 660 VOP_UNLOCK(dvp, 0, td); 661 cnp->cn_flags |= PDIRUNLOCK; 662 } 663 return (0); 664 } 665 error = devfs_allocv(de, dvp->v_mount, vpp, td); 666 if (error) 667 return (error); 668 if (!(flags & LOCKPARENT) || !(flags & ISLASTCN)) { 669 VOP_UNLOCK(dvp, 0, td); 670 cnp->cn_flags |= PDIRUNLOCK; 671 } 672 return (0); 673 } 674 675 static int 676 devfs_lookup(struct vop_lookup_args *ap) 677 { 678 int j; 679 struct devfs_mount *dmp; 680 681 dmp = VFSTODEVFS(ap->a_dvp->v_mount); 682 lockmgr(&dmp->dm_lock, LK_SHARED, 0, curthread); 683 j = devfs_lookupx(ap); 684 lockmgr(&dmp->dm_lock, LK_RELEASE, 0, curthread); 685 return (j); 686 } 687 688 static int 689 devfs_mknod(struct vop_mknod_args *ap) 690 /* 691 struct vop_mknod_args { 692 struct vnodeop_desc *a_desc; 693 struct vnode *a_dvp; 694 struct vnode **a_vpp; 695 struct componentname *a_cnp; 696 struct vattr *a_vap; 697 }; */ 698 { 699 struct componentname *cnp; 700 struct vnode *dvp, **vpp; 701 struct thread *td; 702 struct devfs_dirent *dd, *de; 703 struct devfs_mount *dmp; 704 int error; 705 706 dvp = ap->a_dvp; 707 dmp = VFSTODEVFS(dvp->v_mount); 708 lockmgr(&dmp->dm_lock, LK_EXCLUSIVE, 0, curthread); 709 710 cnp = ap->a_cnp; 711 vpp = ap->a_vpp; 712 td = cnp->cn_thread; 713 dd = dvp->v_data; 714 715 error = ENOENT; 716 TAILQ_FOREACH(de, &dd->de_dlist, de_list) { 717 if (cnp->cn_namelen != de->de_dirent->d_namlen) 718 continue; 719 if (bcmp(cnp->cn_nameptr, de->de_dirent->d_name, 720 de->de_dirent->d_namlen) != 0) 721 continue; 722 if (de->de_flags & DE_WHITEOUT) 723 break; 724 goto notfound; 725 } 726 if (de == NULL) 727 goto notfound; 728 de->de_flags &= ~DE_WHITEOUT; 729 error = devfs_allocv(de, dvp->v_mount, vpp, td); 730 notfound: 731 lockmgr(&dmp->dm_lock, LK_RELEASE, 0, curthread); 732 return (error); 733 } 734 735 /* 736 * Open a special file. 737 */ 738 /* ARGSUSED */ 739 static int 740 devfs_open(ap) 741 struct vop_open_args /* { 742 struct vnode *a_vp; 743 int a_mode; 744 struct ucred *a_cred; 745 struct thread *a_td; 746 int a_fdidx; 747 } */ *ap; 748 { 749 struct thread *td = ap->a_td; 750 struct vnode *vp = ap->a_vp; 751 struct cdev *dev = vp->v_rdev; 752 struct file *fp; 753 int error; 754 struct cdevsw *dsw; 755 756 if (vp->v_type == VBLK) 757 return (ENXIO); 758 759 if (dev == NULL) 760 return (ENXIO); 761 762 /* Make this field valid before any I/O in d_open. */ 763 if (dev->si_iosize_max == 0) 764 dev->si_iosize_max = DFLTPHYS; 765 766 if (vn_isdisk(vp, NULL) && 767 ap->a_cred != FSCRED && (ap->a_mode & FWRITE)) { 768 /* 769 * When running in very secure mode, do not allow 770 * opens for writing of any disks. 771 * XXX: should be in geom_dev.c, but we lack the cred there. 772 */ 773 error = securelevel_ge(td->td_ucred, 2); 774 if (error) 775 return (error); 776 } 777 778 dsw = dev_refthread(dev); 779 if (dsw == NULL) 780 return (ENXIO); 781 782 /* XXX: Special casing of ttys for deadfs. Probably redundant. */ 783 if (dsw->d_flags & D_TTY) 784 vp->v_vflag |= VV_ISTTY; 785 786 VOP_UNLOCK(vp, 0, td); 787 788 if(!(dsw->d_flags & D_NEEDGIANT)) { 789 DROP_GIANT(); 790 if (dsw->d_fdopen != NULL) 791 error = dsw->d_fdopen(dev, ap->a_mode, td, ap->a_fdidx); 792 else 793 error = dsw->d_open(dev, ap->a_mode, S_IFCHR, td); 794 PICKUP_GIANT(); 795 } else if (dsw->d_fdopen != NULL) 796 error = dsw->d_fdopen(dev, ap->a_mode, td, ap->a_fdidx); 797 else 798 error = dsw->d_open(dev, ap->a_mode, S_IFCHR, td); 799 800 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, td); 801 802 dev_relthread(dev); 803 804 if (error) 805 return (error); 806 807 if (ap->a_fdidx >= 0) { 808 /* 809 * This is a pretty disgustingly long chain, but I am not 810 * sure there is any better way. Passing the fdidx into 811 * VOP_OPEN() offers us more information than just passing 812 * the file *. 813 */ 814 fp = ap->a_td->td_proc->p_fd->fd_ofiles[ap->a_fdidx]; 815 if (fp->f_ops == &badfileops) { 816 #if 0 817 printf("devfs_open(%s)\n", devtoname(dev)); 818 #endif 819 fp->f_ops = &devfs_ops_f; 820 fp->f_data = dev; 821 } 822 } 823 824 return (error); 825 } 826 827 static int 828 devfs_pathconf(ap) 829 struct vop_pathconf_args /* { 830 struct vnode *a_vp; 831 int a_name; 832 int *a_retval; 833 } */ *ap; 834 { 835 836 switch (ap->a_name) { 837 case _PC_NAME_MAX: 838 *ap->a_retval = NAME_MAX; 839 return (0); 840 case _PC_PATH_MAX: 841 *ap->a_retval = PATH_MAX; 842 return (0); 843 case _PC_MAC_PRESENT: 844 #ifdef MAC 845 /* 846 * If MAC is enabled, devfs automatically supports 847 * trivial non-persistant label storage. 848 */ 849 *ap->a_retval = 1; 850 #else 851 *ap->a_retval = 0; 852 #endif 853 return (0); 854 default: 855 return (vop_stdpathconf(ap)); 856 } 857 /* NOTREACHED */ 858 } 859 860 /* ARGSUSED */ 861 static int 862 devfs_poll_f(struct file *fp, int events, struct ucred *cred, struct thread *td) 863 { 864 struct cdev *dev; 865 struct cdevsw *dsw; 866 int error; 867 868 error = devfs_fp_check(fp, &dev, &dsw); 869 if (error) 870 return (error); 871 if (dsw->d_flags & D_NEEDGIANT) 872 mtx_lock(&Giant); 873 error = dsw->d_poll(dev, events, td); 874 if (dsw->d_flags & D_NEEDGIANT) 875 mtx_unlock(&Giant); 876 dev_relthread(dev); 877 return(error); 878 } 879 880 /* 881 * Print out the contents of a special device vnode. 882 */ 883 static int 884 devfs_print(ap) 885 struct vop_print_args /* { 886 struct vnode *a_vp; 887 } */ *ap; 888 { 889 890 printf("\tdev %s\n", devtoname(ap->a_vp->v_rdev)); 891 return (0); 892 } 893 894 /* 895 * Vnode op for read 896 */ 897 /* ARGSUSED */ 898 static int 899 devfs_read_f(struct file *fp, struct uio *uio, struct ucred *cred, int flags, struct thread *td) 900 { 901 struct cdev *dev; 902 int ioflag, error, resid; 903 struct cdevsw *dsw; 904 905 error = devfs_fp_check(fp, &dev, &dsw); 906 if (error) 907 return (error); 908 resid = uio->uio_resid; 909 ioflag = 0; 910 if (fp->f_flag & FNONBLOCK) 911 ioflag |= IO_NDELAY; 912 if (fp->f_flag & O_DIRECT) 913 ioflag |= IO_DIRECT; 914 915 if ((flags & FOF_OFFSET) == 0) 916 uio->uio_offset = fp->f_offset; 917 918 if (dsw->d_flags & D_NEEDGIANT) 919 mtx_lock(&Giant); 920 error = dsw->d_read(dev, uio, ioflag); 921 if (dsw->d_flags & D_NEEDGIANT) 922 mtx_unlock(&Giant); 923 dev_relthread(dev); 924 if (uio->uio_resid != resid || (error == 0 && resid != 0)) 925 vfs_timestamp(&dev->si_atime); 926 927 if ((flags & FOF_OFFSET) == 0) 928 fp->f_offset = uio->uio_offset; 929 fp->f_nextoff = uio->uio_offset; 930 return (error); 931 } 932 933 static int 934 devfs_readdir(ap) 935 struct vop_readdir_args /* { 936 struct vnode *a_vp; 937 struct uio *a_uio; 938 struct ucred *a_cred; 939 int *a_eofflag; 940 int *a_ncookies; 941 u_long **a_cookies; 942 } */ *ap; 943 { 944 int error; 945 struct uio *uio; 946 struct dirent *dp; 947 struct devfs_dirent *dd; 948 struct devfs_dirent *de; 949 struct devfs_mount *dmp; 950 off_t off, oldoff; 951 int ncookies = 0; 952 u_long *cookiebuf, *cookiep; 953 struct dirent *dps, *dpe; 954 955 if (ap->a_vp->v_type != VDIR) 956 return (ENOTDIR); 957 958 uio = ap->a_uio; 959 if (uio->uio_offset < 0) 960 return (EINVAL); 961 962 dmp = VFSTODEVFS(ap->a_vp->v_mount); 963 lockmgr(&dmp->dm_lock, LK_SHARED, 0, curthread); 964 devfs_populate(dmp); 965 error = 0; 966 de = ap->a_vp->v_data; 967 off = 0; 968 oldoff = uio->uio_offset; 969 TAILQ_FOREACH(dd, &de->de_dlist, de_list) { 970 if (dd->de_flags & DE_WHITEOUT) 971 continue; 972 if (dd->de_dirent->d_type == DT_DIR) 973 de = dd->de_dir; 974 else 975 de = dd; 976 dp = dd->de_dirent; 977 if (dp->d_reclen > uio->uio_resid) 978 break; 979 dp->d_fileno = de->de_inode; 980 if (off >= uio->uio_offset) { 981 ncookies++; 982 error = uiomove(dp, dp->d_reclen, uio); 983 if (error) 984 break; 985 } 986 off += dp->d_reclen; 987 } 988 if( !error && ap->a_ncookies != NULL && ap->a_cookies != NULL ) { 989 MALLOC(cookiebuf, u_long *, ncookies * sizeof(u_long), 990 M_TEMP, M_WAITOK); 991 cookiep = cookiebuf; 992 dps = (struct dirent *)((char *)uio->uio_iov->iov_base - 993 (uio->uio_offset - oldoff)); 994 dpe = (struct dirent *) uio->uio_iov->iov_base; 995 for( dp = dps; 996 dp < dpe; 997 dp = (struct dirent *)((caddr_t) dp + dp->d_reclen)) { 998 oldoff += dp->d_reclen; 999 *cookiep++ = (u_long) oldoff; 1000 } 1001 *ap->a_ncookies = ncookies; 1002 *ap->a_cookies = cookiebuf; 1003 } 1004 lockmgr(&dmp->dm_lock, LK_RELEASE, 0, curthread); 1005 uio->uio_offset = off; 1006 return (error); 1007 } 1008 1009 static int 1010 devfs_readlink(ap) 1011 struct vop_readlink_args /* { 1012 struct vnode *a_vp; 1013 struct uio *a_uio; 1014 struct ucred *a_cead; 1015 } */ *ap; 1016 { 1017 int error; 1018 struct devfs_dirent *de; 1019 1020 de = ap->a_vp->v_data; 1021 error = uiomove(de->de_symlink, strlen(de->de_symlink), ap->a_uio); 1022 return (error); 1023 } 1024 1025 static int 1026 devfs_reclaim(ap) 1027 struct vop_reclaim_args /* { 1028 struct vnode *a_vp; 1029 } */ *ap; 1030 { 1031 struct vnode *vp = ap->a_vp; 1032 struct devfs_dirent *de; 1033 int i; 1034 1035 de = vp->v_data; 1036 if (de != NULL) 1037 de->de_vnode = NULL; 1038 vp->v_data = NULL; 1039 if (vp->v_rdev != NULL) { 1040 i = vcount(vp); 1041 if ((vp->v_rdev->si_flags & SI_CHEAPCLONE) && i == 0 && 1042 (vp->v_rdev->si_flags & SI_NAMED)) 1043 destroy_dev(vp->v_rdev); 1044 } 1045 return (0); 1046 } 1047 1048 static int 1049 devfs_remove(ap) 1050 struct vop_remove_args /* { 1051 struct vnode *a_dvp; 1052 struct vnode *a_vp; 1053 struct componentname *a_cnp; 1054 } */ *ap; 1055 { 1056 struct vnode *vp = ap->a_vp; 1057 struct devfs_dirent *dd; 1058 struct devfs_dirent *de; 1059 struct devfs_mount *dmp = VFSTODEVFS(vp->v_mount); 1060 1061 lockmgr(&dmp->dm_lock, LK_EXCLUSIVE, 0, curthread); 1062 dd = ap->a_dvp->v_data; 1063 de = vp->v_data; 1064 if (de->de_dirent->d_type == DT_LNK) { 1065 TAILQ_REMOVE(&dd->de_dlist, de, de_list); 1066 if (de->de_vnode) 1067 de->de_vnode->v_data = NULL; 1068 #ifdef MAC 1069 mac_destroy_devfsdirent(de); 1070 #endif 1071 FREE(de, M_DEVFS); 1072 } else { 1073 de->de_flags |= DE_WHITEOUT; 1074 } 1075 lockmgr(&dmp->dm_lock, LK_RELEASE, 0, curthread); 1076 return (0); 1077 } 1078 1079 /* 1080 * Revoke is called on a tty when a terminal session ends. The vnode 1081 * is orphaned by setting v_op to deadfs so we need to let go of it 1082 * as well so that we create a new one next time around. 1083 */ 1084 static int 1085 devfs_revoke(ap) 1086 struct vop_revoke_args /* { 1087 struct vnode *a_vp; 1088 int a_flags; 1089 } */ *ap; 1090 { 1091 struct vnode *vp = ap->a_vp; 1092 struct vnode *vq; 1093 struct devfs_dirent *de; 1094 struct cdev *dev; 1095 1096 KASSERT((ap->a_flags & REVOKEALL) != 0, ("devfs_revoke !REVOKEALL")); 1097 de = vp->v_data; 1098 de->de_vnode = NULL; 1099 1100 VI_LOCK(vp); 1101 /* 1102 * If a vgone (or vclean) is already in progress, 1103 * wait until it is done and return. 1104 */ 1105 if (vp->v_iflag & VI_XLOCK) { 1106 vp->v_iflag |= VI_XWANT; 1107 msleep(vp, VI_MTX(vp), PINOD | PDROP, "vop_revokeall", 0); 1108 return (0); 1109 } 1110 VI_UNLOCK(vp); 1111 dev = vp->v_rdev; 1112 for (;;) { 1113 dev_lock(); 1114 vq = SLIST_FIRST(&dev->si_hlist); 1115 dev_unlock(); 1116 if (vq == NULL) 1117 break; 1118 vgone(vq); 1119 } 1120 return (0); 1121 } 1122 1123 static int 1124 devfs_rioctl(ap) 1125 struct vop_ioctl_args /* { 1126 struct vnode *a_vp; 1127 u_long a_command; 1128 caddr_t a_data; 1129 int a_fflag; 1130 struct ucred *a_cred; 1131 struct thread *a_td; 1132 } */ *ap; 1133 { 1134 int error; 1135 struct devfs_mount *dmp; 1136 1137 dmp = VFSTODEVFS(ap->a_vp->v_mount); 1138 lockmgr(&dmp->dm_lock, LK_SHARED, 0, curthread); 1139 devfs_populate(dmp); 1140 lockmgr(&dmp->dm_lock, LK_RELEASE, 0, curthread); 1141 error = devfs_rules_ioctl(ap->a_vp->v_mount, ap->a_command, ap->a_data, 1142 ap->a_td); 1143 return (error); 1144 } 1145 1146 static int 1147 devfs_rread(ap) 1148 struct vop_read_args /* { 1149 struct vnode *a_vp; 1150 struct uio *a_uio; 1151 int a_ioflag; 1152 struct ucred *a_cred; 1153 } */ *ap; 1154 { 1155 1156 if (ap->a_vp->v_type != VDIR) 1157 return (EINVAL); 1158 return (VOP_READDIR(ap->a_vp, ap->a_uio, ap->a_cred, NULL, NULL, NULL)); 1159 } 1160 1161 static int 1162 devfs_setattr(ap) 1163 struct vop_setattr_args /* { 1164 struct vnode *a_vp; 1165 struct vattr *a_vap; 1166 struct ucred *a_cred; 1167 struct proc *a_p; 1168 } */ *ap; 1169 { 1170 struct devfs_dirent *de; 1171 struct vattr *vap; 1172 struct vnode *vp; 1173 int c, error; 1174 uid_t uid; 1175 gid_t gid; 1176 1177 vap = ap->a_vap; 1178 vp = ap->a_vp; 1179 if ((vap->va_type != VNON) || 1180 (vap->va_nlink != VNOVAL) || 1181 (vap->va_fsid != VNOVAL) || 1182 (vap->va_fileid != VNOVAL) || 1183 (vap->va_blocksize != VNOVAL) || 1184 (vap->va_flags != VNOVAL && vap->va_flags != 0) || 1185 (vap->va_rdev != VNOVAL) || 1186 ((int)vap->va_bytes != VNOVAL) || 1187 (vap->va_gen != VNOVAL)) { 1188 return (EINVAL); 1189 } 1190 1191 de = vp->v_data; 1192 if (vp->v_type == VDIR) 1193 de = de->de_dir; 1194 1195 error = c = 0; 1196 if (vap->va_uid == (uid_t)VNOVAL) 1197 uid = de->de_uid; 1198 else 1199 uid = vap->va_uid; 1200 if (vap->va_gid == (gid_t)VNOVAL) 1201 gid = de->de_gid; 1202 else 1203 gid = vap->va_gid; 1204 if (uid != de->de_uid || gid != de->de_gid) { 1205 if (((ap->a_cred->cr_uid != de->de_uid) || uid != de->de_uid || 1206 (gid != de->de_gid && !groupmember(gid, ap->a_cred))) && 1207 (error = suser_cred(ap->a_td->td_ucred, SUSER_ALLOWJAIL)) != 0) 1208 return (error); 1209 de->de_uid = uid; 1210 de->de_gid = gid; 1211 c = 1; 1212 } 1213 1214 if (vap->va_mode != (mode_t)VNOVAL) { 1215 if ((ap->a_cred->cr_uid != de->de_uid) && 1216 (error = suser_cred(ap->a_td->td_ucred, SUSER_ALLOWJAIL))) 1217 return (error); 1218 de->de_mode = vap->va_mode; 1219 c = 1; 1220 } 1221 1222 if (vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL) { 1223 /* See the comment in ufs_vnops::ufs_setattr(). */ 1224 if ((error = VOP_ACCESS(vp, VADMIN, ap->a_cred, ap->a_td)) && 1225 ((vap->va_vaflags & VA_UTIMES_NULL) == 0 || 1226 (error = VOP_ACCESS(vp, VWRITE, ap->a_cred, ap->a_td)))) 1227 return (error); 1228 if (vap->va_atime.tv_sec != VNOVAL) { 1229 if (vp->v_type == VCHR) 1230 vp->v_rdev->si_atime = vap->va_atime; 1231 else 1232 de->de_atime = vap->va_atime; 1233 } 1234 if (vap->va_mtime.tv_sec != VNOVAL) { 1235 if (vp->v_type == VCHR) 1236 vp->v_rdev->si_mtime = vap->va_mtime; 1237 else 1238 de->de_mtime = vap->va_mtime; 1239 } 1240 c = 1; 1241 } 1242 1243 if (c) { 1244 if (vp->v_type == VCHR) 1245 vfs_timestamp(&vp->v_rdev->si_ctime); 1246 else 1247 vfs_timestamp(&de->de_mtime); 1248 } 1249 return (0); 1250 } 1251 1252 #ifdef MAC 1253 static int 1254 devfs_setlabel(ap) 1255 struct vop_setlabel_args /* { 1256 struct vnode *a_vp; 1257 struct mac *a_label; 1258 struct ucred *a_cred; 1259 struct thread *a_td; 1260 } */ *ap; 1261 { 1262 struct vnode *vp; 1263 struct devfs_dirent *de; 1264 1265 vp = ap->a_vp; 1266 de = vp->v_data; 1267 1268 mac_relabel_vnode(ap->a_cred, vp, ap->a_label); 1269 mac_update_devfsdirent(vp->v_mount, de, vp); 1270 1271 return (0); 1272 } 1273 #endif 1274 1275 static int 1276 devfs_stat_f(struct file *fp, struct stat *sb, struct ucred *cred, struct thread *td) 1277 { 1278 1279 return (vnops.fo_stat(fp, sb, cred, td)); 1280 } 1281 1282 static int 1283 devfs_symlink(ap) 1284 struct vop_symlink_args /* { 1285 struct vnode *a_dvp; 1286 struct vnode **a_vpp; 1287 struct componentname *a_cnp; 1288 struct vattr *a_vap; 1289 char *a_target; 1290 } */ *ap; 1291 { 1292 int i, error; 1293 struct devfs_dirent *dd; 1294 struct devfs_dirent *de; 1295 struct devfs_mount *dmp; 1296 struct thread *td; 1297 1298 td = ap->a_cnp->cn_thread; 1299 KASSERT(td == curthread, ("devfs_symlink: td != curthread")); 1300 error = suser(td); 1301 if (error) 1302 return(error); 1303 dmp = VFSTODEVFS(ap->a_dvp->v_mount); 1304 dd = ap->a_dvp->v_data; 1305 de = devfs_newdirent(ap->a_cnp->cn_nameptr, ap->a_cnp->cn_namelen); 1306 de->de_uid = 0; 1307 de->de_gid = 0; 1308 de->de_mode = 0755; 1309 de->de_inode = dmp->dm_inode++; 1310 de->de_dirent->d_type = DT_LNK; 1311 i = strlen(ap->a_target) + 1; 1312 MALLOC(de->de_symlink, char *, i, M_DEVFS, M_WAITOK); 1313 bcopy(ap->a_target, de->de_symlink, i); 1314 lockmgr(&dmp->dm_lock, LK_EXCLUSIVE, 0, td); 1315 #ifdef MAC 1316 mac_create_devfs_symlink(ap->a_cnp->cn_cred, dmp->dm_mount, dd, de); 1317 #endif 1318 TAILQ_INSERT_TAIL(&dd->de_dlist, de, de_list); 1319 devfs_allocv(de, ap->a_dvp->v_mount, ap->a_vpp, td); 1320 lockmgr(&dmp->dm_lock, LK_RELEASE, 0, td); 1321 return (0); 1322 } 1323 1324 /* 1325 * Vnode op for write 1326 */ 1327 /* ARGSUSED */ 1328 static int 1329 devfs_write_f(struct file *fp, struct uio *uio, struct ucred *cred, int flags, struct thread *td) 1330 { 1331 struct cdev *dev; 1332 struct vnode *vp; 1333 int error, ioflag, resid; 1334 struct cdevsw *dsw; 1335 1336 error = devfs_fp_check(fp, &dev, &dsw); 1337 if (error) 1338 return (error); 1339 KASSERT(uio->uio_td == td, ("uio_td %p is not td %p", uio->uio_td, td)); 1340 vp = fp->f_vnode; 1341 ioflag = IO_UNIT; 1342 if (fp->f_flag & FNONBLOCK) 1343 ioflag |= IO_NDELAY; 1344 if (fp->f_flag & O_DIRECT) 1345 ioflag |= IO_DIRECT; 1346 if ((fp->f_flag & O_FSYNC) || 1347 (vp->v_mount && (vp->v_mount->mnt_flag & MNT_SYNCHRONOUS))) 1348 ioflag |= IO_SYNC; 1349 if ((flags & FOF_OFFSET) == 0) 1350 uio->uio_offset = fp->f_offset; 1351 1352 resid = uio->uio_resid; 1353 1354 if (dsw->d_flags & D_NEEDGIANT) 1355 mtx_lock(&Giant); 1356 error = dsw->d_write(dev, uio, ioflag); 1357 if (dsw->d_flags & D_NEEDGIANT) 1358 mtx_unlock(&Giant); 1359 dev_relthread(dev); 1360 if (uio->uio_resid != resid || (error == 0 && resid != 0)) { 1361 vfs_timestamp(&dev->si_ctime); 1362 dev->si_mtime = dev->si_ctime; 1363 } 1364 1365 if ((flags & FOF_OFFSET) == 0) 1366 fp->f_offset = uio->uio_offset; 1367 fp->f_nextoff = uio->uio_offset; 1368 return (error); 1369 } 1370 1371 static struct vop_vector devfs_vnodeops = { 1372 .vop_default = &default_vnodeops, 1373 .vop_access = devfs_access, 1374 .vop_getattr = devfs_getattr, 1375 .vop_ioctl = devfs_rioctl, 1376 .vop_lookup = devfs_lookup, 1377 .vop_mknod = devfs_mknod, 1378 .vop_pathconf = devfs_pathconf, 1379 .vop_read = devfs_rread, 1380 .vop_readdir = devfs_readdir, 1381 .vop_readlink = devfs_readlink, 1382 .vop_reclaim = devfs_reclaim, 1383 .vop_remove = devfs_remove, 1384 .vop_revoke = devfs_revoke, 1385 .vop_setattr = devfs_setattr, 1386 #ifdef MAC 1387 .vop_setlabel = devfs_setlabel, 1388 #endif 1389 .vop_symlink = devfs_symlink, 1390 }; 1391 1392 struct vop_vector devfs_specops = { 1393 .vop_default = &default_vnodeops, 1394 .vop_access = devfs_access, 1395 .vop_advlock = devfs_advlock, 1396 .vop_bmap = VOP_PANIC, 1397 .vop_close = devfs_close, 1398 .vop_create = VOP_PANIC, 1399 .vop_fsync = devfs_fsync, 1400 .vop_getattr = devfs_getattr, 1401 .vop_lease = VOP_NULL, 1402 .vop_link = VOP_PANIC, 1403 .vop_mkdir = VOP_PANIC, 1404 .vop_mknod = VOP_PANIC, 1405 .vop_open = devfs_open, 1406 .vop_pathconf = devfs_pathconf, 1407 .vop_print = devfs_print, 1408 .vop_readdir = VOP_PANIC, 1409 .vop_readlink = VOP_PANIC, 1410 .vop_reallocblks = VOP_PANIC, 1411 .vop_reclaim = devfs_reclaim, 1412 .vop_remove = devfs_remove, 1413 .vop_rename = VOP_PANIC, 1414 .vop_revoke = devfs_revoke, 1415 .vop_rmdir = VOP_PANIC, 1416 .vop_setattr = devfs_setattr, 1417 #ifdef MAC 1418 .vop_setlabel = devfs_setlabel, 1419 #endif 1420 .vop_strategy = VOP_PANIC, 1421 .vop_symlink = VOP_PANIC, 1422 }; 1423