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 int devfs_access(struct vop_access_args *ap); 91 static int devfs_advlock(struct vop_advlock_args *ap); 92 static int devfs_close(struct vop_close_args *ap); 93 static int devfs_fsync(struct vop_fsync_args *ap); 94 static int devfs_getattr(struct vop_getattr_args *ap); 95 static int devfs_lookupx(struct vop_lookup_args *ap); 96 static int devfs_mknod(struct vop_mknod_args *ap); 97 static int devfs_open(struct vop_open_args *ap); 98 static int devfs_pathconf(struct vop_pathconf_args *ap); 99 static int devfs_print(struct vop_print_args *ap); 100 static int devfs_readdir(struct vop_readdir_args *ap); 101 static int devfs_readlink(struct vop_readlink_args *ap); 102 static int devfs_reclaim(struct vop_reclaim_args *ap); 103 static int devfs_remove(struct vop_remove_args *ap); 104 static int devfs_revoke(struct vop_revoke_args *ap); 105 static int devfs_rioctl(struct vop_ioctl_args *ap); 106 static int devfs_rread(struct vop_read_args *ap); 107 static int devfs_setattr(struct vop_setattr_args *ap); 108 #ifdef MAC 109 static int devfs_setlabel(struct vop_setlabel_args *ap); 110 #endif 111 static int devfs_symlink(struct vop_symlink_args *ap); 112 113 static vop_t **devfs_vnodeop_p; 114 vop_t **devfs_specop_p; 115 116 static int 117 devfs_fp_check(struct file *fp, struct cdev **devp, struct cdevsw **dswp) 118 { 119 120 *devp = fp->f_vnode->v_rdev; 121 if (*devp != fp->f_data) 122 return (ENXIO); 123 KASSERT((*devp)->si_refcount > 0, 124 ("devfs: un-referenced struct cdev *(%s)", devtoname(*devp))); 125 *dswp = dev_refthread(*devp); 126 if (*dswp == NULL) 127 return (ENXIO); 128 return (0); 129 } 130 131 /* 132 * Construct the fully qualified path name relative to the mountpoint 133 */ 134 static char * 135 devfs_fqpn(char *buf, struct vnode *dvp, struct componentname *cnp) 136 { 137 int i; 138 struct devfs_dirent *de, *dd; 139 struct devfs_mount *dmp; 140 141 dmp = VFSTODEVFS(dvp->v_mount); 142 dd = dvp->v_data; 143 i = SPECNAMELEN; 144 buf[i] = '\0'; 145 i -= cnp->cn_namelen; 146 if (i < 0) 147 return (NULL); 148 bcopy(cnp->cn_nameptr, buf + i, cnp->cn_namelen); 149 de = dd; 150 while (de != dmp->dm_basedir) { 151 i--; 152 if (i < 0) 153 return (NULL); 154 buf[i] = '/'; 155 i -= de->de_dirent->d_namlen; 156 if (i < 0) 157 return (NULL); 158 bcopy(de->de_dirent->d_name, buf + i, 159 de->de_dirent->d_namlen); 160 de = TAILQ_FIRST(&de->de_dlist); /* "." */ 161 de = TAILQ_NEXT(de, de_list); /* ".." */ 162 de = de->de_dir; 163 } 164 return (buf + i); 165 } 166 167 int 168 devfs_allocv(struct devfs_dirent *de, struct mount *mp, struct vnode **vpp, struct thread *td) 169 { 170 int error; 171 struct vnode *vp; 172 struct cdev *dev; 173 174 KASSERT(td == curthread, ("devfs_allocv: td != curthread")); 175 loop: 176 vp = de->de_vnode; 177 if (vp != NULL) { 178 if (vget(vp, LK_EXCLUSIVE, td)) 179 goto loop; 180 *vpp = vp; 181 return (0); 182 } 183 if (de->de_dirent->d_type == DT_CHR) { 184 dev = *devfs_itod(de->de_inode); 185 if (dev == NULL) 186 return (ENOENT); 187 } else { 188 dev = NULL; 189 } 190 error = getnewvnode("devfs", mp, devfs_vnodeop_p, &vp); 191 if (error != 0) { 192 printf("devfs_allocv: failed to allocate new vnode\n"); 193 return (error); 194 } 195 196 if (de->de_dirent->d_type == DT_CHR) { 197 vp->v_type = VCHR; 198 vp = addaliasu(vp, dev->si_udev); 199 vp->v_op = devfs_specop_p; 200 } else if (de->de_dirent->d_type == DT_DIR) { 201 vp->v_type = VDIR; 202 } else if (de->de_dirent->d_type == DT_LNK) { 203 vp->v_type = VLNK; 204 } else { 205 vp->v_type = VBAD; 206 } 207 vp->v_data = de; 208 de->de_vnode = vp; 209 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, td); 210 #ifdef MAC 211 mac_associate_vnode_devfs(mp, de, vp); 212 #endif 213 *vpp = vp; 214 return (0); 215 } 216 217 static int 218 devfs_access(ap) 219 struct vop_access_args /* { 220 struct vnode *a_vp; 221 int a_mode; 222 struct ucred *a_cred; 223 struct thread *a_td; 224 } */ *ap; 225 { 226 struct vnode *vp = ap->a_vp; 227 struct devfs_dirent *de; 228 int error; 229 230 de = vp->v_data; 231 if (vp->v_type == VDIR) 232 de = de->de_dir; 233 234 error = vaccess(vp->v_type, de->de_mode, de->de_uid, de->de_gid, 235 ap->a_mode, ap->a_cred, NULL); 236 if (!error) 237 return (error); 238 if (error != EACCES) 239 return (error); 240 /* We do, however, allow access to the controlling terminal */ 241 if (!(ap->a_td->td_proc->p_flag & P_CONTROLT)) 242 return (error); 243 if (ap->a_td->td_proc->p_session->s_ttyvp == de->de_vnode) 244 return (0); 245 return (error); 246 } 247 248 /* 249 * Special device advisory byte-level locks. 250 */ 251 /* ARGSUSED */ 252 static int 253 devfs_advlock(ap) 254 struct vop_advlock_args /* { 255 struct vnode *a_vp; 256 caddr_t a_id; 257 int a_op; 258 struct flock *a_fl; 259 int a_flags; 260 } */ *ap; 261 { 262 263 return (ap->a_flags & F_FLOCK ? EOPNOTSUPP : EINVAL); 264 } 265 266 /* 267 * Device close routine 268 */ 269 /* ARGSUSED */ 270 static int 271 devfs_close(ap) 272 struct vop_close_args /* { 273 struct vnode *a_vp; 274 int a_fflag; 275 struct ucred *a_cred; 276 struct thread *a_td; 277 } */ *ap; 278 { 279 struct vnode *vp = ap->a_vp, *oldvp; 280 struct thread *td = ap->a_td; 281 struct cdev *dev = vp->v_rdev; 282 struct cdevsw *dsw; 283 int error; 284 285 /* 286 * Hack: a tty device that is a controlling terminal 287 * has a reference from the session structure. 288 * We cannot easily tell that a character device is 289 * a controlling terminal, unless it is the closing 290 * process' controlling terminal. In that case, 291 * if the reference count is 2 (this last descriptor 292 * plus the session), release the reference from the session. 293 */ 294 295 /* 296 * This needs to be rewritten to take the vp interlock into 297 * consideration. 298 */ 299 300 oldvp = NULL; 301 sx_xlock(&proctree_lock); 302 if (td && vp == td->td_proc->p_session->s_ttyvp) { 303 SESS_LOCK(td->td_proc->p_session); 304 VI_LOCK(vp); 305 if (count_dev(dev) == 2 && (vp->v_iflag & VI_XLOCK) == 0) { 306 td->td_proc->p_session->s_ttyvp = NULL; 307 oldvp = vp; 308 } 309 VI_UNLOCK(vp); 310 SESS_UNLOCK(td->td_proc->p_session); 311 } 312 sx_xunlock(&proctree_lock); 313 if (oldvp != NULL) 314 vrele(oldvp); 315 /* 316 * We do not want to really close the device if it 317 * is still in use unless we are trying to close it 318 * forcibly. Since every use (buffer, vnode, swap, cmap) 319 * holds a reference to the vnode, and because we mark 320 * any other vnodes that alias this device, when the 321 * sum of the reference counts on all the aliased 322 * vnodes descends to one, we are on last close. 323 */ 324 dsw = dev_refthread(dev); 325 if (dsw == NULL) 326 return (ENXIO); 327 VI_LOCK(vp); 328 if (vp->v_iflag & VI_XLOCK) { 329 /* Forced close. */ 330 } else if (dsw->d_flags & D_TRACKCLOSE) { 331 /* Keep device updated on status. */ 332 } else if (count_dev(dev) > 1) { 333 VI_UNLOCK(vp); 334 dev_relthread(dev); 335 return (0); 336 } 337 VI_UNLOCK(vp); 338 KASSERT(dev->si_refcount > 0, 339 ("devfs_close() on un-referenced struct cdev *(%s)", devtoname(dev))); 340 if (!(dsw->d_flags & D_NEEDGIANT)) { 341 DROP_GIANT(); 342 error = dsw->d_close(dev, ap->a_fflag, S_IFCHR, td); 343 PICKUP_GIANT(); 344 } else 345 error = dsw->d_close(dev, ap->a_fflag, S_IFCHR, td); 346 dev_relthread(dev); 347 return (error); 348 } 349 350 static int 351 devfs_close_f(struct file *fp, struct thread *td) 352 { 353 354 return (vnops.fo_close(fp, td)); 355 } 356 357 /* 358 * Synch buffers associated with a block device 359 */ 360 /* ARGSUSED */ 361 static int 362 devfs_fsync(ap) 363 struct vop_fsync_args /* { 364 struct vnode *a_vp; 365 struct ucred *a_cred; 366 int a_waitfor; 367 struct thread *a_td; 368 } */ *ap; 369 { 370 if (!vn_isdisk(ap->a_vp, NULL)) 371 return (0); 372 373 return (vop_stdfsync(ap)); 374 } 375 376 static int 377 devfs_getattr(ap) 378 struct vop_getattr_args /* { 379 struct vnode *a_vp; 380 struct vattr *a_vap; 381 struct ucred *a_cred; 382 struct thread *a_td; 383 } */ *ap; 384 { 385 struct vnode *vp = ap->a_vp; 386 struct vattr *vap = ap->a_vap; 387 int error = 0; 388 struct devfs_dirent *de; 389 struct cdev *dev; 390 391 de = vp->v_data; 392 if (vp->v_type == VDIR) 393 de = de->de_dir; 394 bzero((caddr_t) vap, sizeof(*vap)); 395 vattr_null(vap); 396 vap->va_uid = de->de_uid; 397 vap->va_gid = de->de_gid; 398 vap->va_mode = de->de_mode; 399 if (vp->v_type == VLNK) 400 vap->va_size = strlen(de->de_symlink); 401 else if (vp->v_type == VDIR) 402 vap->va_size = vap->va_bytes = DEV_BSIZE; 403 else 404 vap->va_size = 0; 405 if (vp->v_type != VDIR) 406 vap->va_bytes = 0; 407 vap->va_blocksize = DEV_BSIZE; 408 vap->va_type = vp->v_type; 409 410 #define fix(aa) \ 411 do { \ 412 if ((aa).tv_sec == 0) { \ 413 (aa).tv_sec = boottime.tv_sec; \ 414 (aa).tv_nsec = boottime.tv_usec * 1000; \ 415 } \ 416 } while (0) 417 418 if (vp->v_type != VCHR) { 419 fix(de->de_atime); 420 vap->va_atime = de->de_atime; 421 fix(de->de_mtime); 422 vap->va_mtime = de->de_mtime; 423 fix(de->de_ctime); 424 vap->va_ctime = de->de_ctime; 425 } else { 426 dev = vp->v_rdev; 427 fix(dev->si_atime); 428 vap->va_atime = dev->si_atime; 429 fix(dev->si_mtime); 430 vap->va_mtime = dev->si_mtime; 431 fix(dev->si_ctime); 432 vap->va_ctime = dev->si_ctime; 433 vap->va_rdev = dev->si_udev; 434 } 435 vap->va_gen = 0; 436 vap->va_flags = 0; 437 vap->va_nlink = de->de_links; 438 vap->va_fileid = de->de_inode; 439 440 return (error); 441 } 442 443 /* 444 * Device ioctl operation. 445 */ 446 /* ARGSUSED */ 447 static int 448 devfs_ioctl_f(struct file *fp, u_long com, void *data, struct ucred *cred, struct thread *td) 449 { 450 struct cdev *dev; 451 struct cdevsw *dsw; 452 struct vnode *vp; 453 struct vnode *vpold; 454 int error; 455 456 error = devfs_fp_check(fp, &dev, &dsw); 457 if (error) 458 return (error); 459 460 if (com == FIODTYPE) { 461 *(int *)data = dsw->d_flags & D_TYPEMASK; 462 dev_relthread(dev); 463 return (0); 464 } 465 if (dsw->d_flags & D_NEEDGIANT) 466 mtx_lock(&Giant); 467 error = dsw->d_ioctl(dev, com, data, fp->f_flag, td); 468 if (dsw->d_flags & D_NEEDGIANT) 469 mtx_unlock(&Giant); 470 dev_relthread(dev); 471 if (error == ENOIOCTL) 472 error = ENOTTY; 473 if (error == 0 && com == TIOCSCTTY) { 474 vp = fp->f_vnode; 475 476 /* Do nothing if reassigning same control tty */ 477 sx_slock(&proctree_lock); 478 if (td->td_proc->p_session->s_ttyvp == vp) { 479 sx_sunlock(&proctree_lock); 480 return (0); 481 } 482 483 mtx_lock(&Giant); 484 485 vpold = td->td_proc->p_session->s_ttyvp; 486 VREF(vp); 487 SESS_LOCK(td->td_proc->p_session); 488 td->td_proc->p_session->s_ttyvp = vp; 489 SESS_UNLOCK(td->td_proc->p_session); 490 491 sx_sunlock(&proctree_lock); 492 493 /* Get rid of reference to old control tty */ 494 if (vpold) 495 vrele(vpold); 496 mtx_unlock(&Giant); 497 } 498 return (error); 499 } 500 501 502 /* ARGSUSED */ 503 static int 504 devfs_kqfilter_f(struct file *fp, struct knote *kn) 505 { 506 struct cdev *dev; 507 struct cdevsw *dsw; 508 int error; 509 510 error = devfs_fp_check(fp, &dev, &dsw); 511 if (error) 512 return (error); 513 if (dsw->d_flags & D_NEEDGIANT) 514 mtx_lock(&Giant); 515 error = dsw->d_kqfilter(dev, kn); 516 if (dsw->d_flags & D_NEEDGIANT) 517 mtx_unlock(&Giant); 518 dev_relthread(dev); 519 return (error); 520 } 521 522 static int 523 devfs_lookupx(ap) 524 struct vop_lookup_args /* { 525 struct vnode * a_dvp; 526 struct vnode ** a_vpp; 527 struct componentname * a_cnp; 528 } */ *ap; 529 { 530 struct componentname *cnp; 531 struct vnode *dvp, **vpp; 532 struct thread *td; 533 struct devfs_dirent *de, *dd; 534 struct devfs_dirent **dde; 535 struct devfs_mount *dmp; 536 struct cdev *cdev; 537 int error, flags, nameiop; 538 char specname[SPECNAMELEN + 1], *pname; 539 540 cnp = ap->a_cnp; 541 vpp = ap->a_vpp; 542 dvp = ap->a_dvp; 543 pname = cnp->cn_nameptr; 544 td = cnp->cn_thread; 545 flags = cnp->cn_flags; 546 nameiop = cnp->cn_nameiop; 547 dmp = VFSTODEVFS(dvp->v_mount); 548 dd = dvp->v_data; 549 550 *vpp = NULLVP; 551 cnp->cn_flags &= ~PDIRUNLOCK; 552 553 if ((flags & ISLASTCN) && nameiop == RENAME) 554 return (EOPNOTSUPP); 555 556 if (dvp->v_type != VDIR) 557 return (ENOTDIR); 558 559 if ((flags & ISDOTDOT) && (dvp->v_vflag & VV_ROOT)) 560 return (EIO); 561 562 error = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred, td); 563 if (error) 564 return (error); 565 566 if (cnp->cn_namelen == 1 && *pname == '.') { 567 if ((flags & ISLASTCN) && nameiop != LOOKUP) 568 return (EINVAL); 569 *vpp = dvp; 570 VREF(dvp); 571 return (0); 572 } 573 574 if (flags & ISDOTDOT) { 575 if ((flags & ISLASTCN) && nameiop != LOOKUP) 576 return (EINVAL); 577 VOP_UNLOCK(dvp, 0, td); 578 cnp->cn_flags |= PDIRUNLOCK; 579 de = TAILQ_FIRST(&dd->de_dlist); /* "." */ 580 de = TAILQ_NEXT(de, de_list); /* ".." */ 581 de = de->de_dir; 582 error = devfs_allocv(de, dvp->v_mount, vpp, td); 583 if (error || ((flags & LOCKPARENT) && (flags & ISLASTCN))) { 584 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY, td); 585 cnp->cn_flags &= ~PDIRUNLOCK; 586 } 587 return (error); 588 } 589 590 devfs_populate(dmp); 591 dd = dvp->v_data; 592 TAILQ_FOREACH(de, &dd->de_dlist, de_list) { 593 if (cnp->cn_namelen != de->de_dirent->d_namlen) 594 continue; 595 if (bcmp(cnp->cn_nameptr, de->de_dirent->d_name, 596 de->de_dirent->d_namlen) != 0) 597 continue; 598 if (de->de_flags & DE_WHITEOUT) 599 goto notfound; 600 goto found; 601 } 602 603 if (nameiop == DELETE) 604 goto notfound; 605 606 /* 607 * OK, we didn't have an entry for the name we were asked for 608 * so we try to see if anybody can create it on demand. 609 */ 610 pname = devfs_fqpn(specname, dvp, cnp); 611 if (pname == NULL) 612 goto notfound; 613 614 cdev = NULL; 615 EVENTHANDLER_INVOKE(dev_clone, pname, strlen(pname), &cdev); 616 if (cdev == NULL) 617 goto notfound; 618 619 devfs_populate(dmp); 620 621 dde = devfs_itode(dmp, cdev->si_inode); 622 623 if (dde == NULL || *dde == NULL || *dde == DE_DELETED) 624 goto notfound; 625 626 if ((*dde)->de_flags & DE_WHITEOUT) 627 goto notfound; 628 629 de = *dde; 630 goto found; 631 632 notfound: 633 634 if ((nameiop == CREATE || nameiop == RENAME) && 635 (flags & (LOCKPARENT | WANTPARENT)) && (flags & ISLASTCN)) { 636 cnp->cn_flags |= SAVENAME; 637 if (!(flags & LOCKPARENT)) { 638 VOP_UNLOCK(dvp, 0, td); 639 cnp->cn_flags |= PDIRUNLOCK; 640 } 641 return (EJUSTRETURN); 642 } 643 return (ENOENT); 644 645 646 found: 647 648 if ((cnp->cn_nameiop == DELETE) && (flags & ISLASTCN)) { 649 error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred, td); 650 if (error) 651 return (error); 652 if (*vpp == dvp) { 653 VREF(dvp); 654 *vpp = dvp; 655 return (0); 656 } 657 error = devfs_allocv(de, dvp->v_mount, vpp, td); 658 if (error) 659 return (error); 660 if (!(flags & LOCKPARENT)) { 661 VOP_UNLOCK(dvp, 0, td); 662 cnp->cn_flags |= PDIRUNLOCK; 663 } 664 return (0); 665 } 666 error = devfs_allocv(de, dvp->v_mount, vpp, td); 667 if (error) 668 return (error); 669 if (!(flags & LOCKPARENT) || !(flags & ISLASTCN)) { 670 VOP_UNLOCK(dvp, 0, td); 671 cnp->cn_flags |= PDIRUNLOCK; 672 } 673 return (0); 674 } 675 676 static int 677 devfs_lookup(struct vop_lookup_args *ap) 678 { 679 int j; 680 struct devfs_mount *dmp; 681 682 dmp = VFSTODEVFS(ap->a_dvp->v_mount); 683 lockmgr(&dmp->dm_lock, LK_SHARED, 0, curthread); 684 j = devfs_lookupx(ap); 685 lockmgr(&dmp->dm_lock, LK_RELEASE, 0, curthread); 686 return (j); 687 } 688 689 static int 690 devfs_mknod(struct vop_mknod_args *ap) 691 /* 692 struct vop_mknod_args { 693 struct vnodeop_desc *a_desc; 694 struct vnode *a_dvp; 695 struct vnode **a_vpp; 696 struct componentname *a_cnp; 697 struct vattr *a_vap; 698 }; */ 699 { 700 struct componentname *cnp; 701 struct vnode *dvp, **vpp; 702 struct thread *td; 703 struct devfs_dirent *dd, *de; 704 struct devfs_mount *dmp; 705 int error; 706 707 dvp = ap->a_dvp; 708 dmp = VFSTODEVFS(dvp->v_mount); 709 lockmgr(&dmp->dm_lock, LK_EXCLUSIVE, 0, curthread); 710 711 cnp = ap->a_cnp; 712 vpp = ap->a_vpp; 713 td = cnp->cn_thread; 714 dd = dvp->v_data; 715 716 error = ENOENT; 717 TAILQ_FOREACH(de, &dd->de_dlist, de_list) { 718 if (cnp->cn_namelen != de->de_dirent->d_namlen) 719 continue; 720 if (bcmp(cnp->cn_nameptr, de->de_dirent->d_name, 721 de->de_dirent->d_namlen) != 0) 722 continue; 723 if (de->de_flags & DE_WHITEOUT) 724 break; 725 goto notfound; 726 } 727 if (de == NULL) 728 goto notfound; 729 de->de_flags &= ~DE_WHITEOUT; 730 error = devfs_allocv(de, dvp->v_mount, vpp, td); 731 notfound: 732 lockmgr(&dmp->dm_lock, LK_RELEASE, 0, curthread); 733 return (error); 734 } 735 736 /* 737 * Open a special file. 738 */ 739 /* ARGSUSED */ 740 static int 741 devfs_open(ap) 742 struct vop_open_args /* { 743 struct vnode *a_vp; 744 int a_mode; 745 struct ucred *a_cred; 746 struct thread *a_td; 747 int a_fdidx; 748 } */ *ap; 749 { 750 struct thread *td = ap->a_td; 751 struct vnode *vp = ap->a_vp; 752 struct cdev *dev = vp->v_rdev; 753 struct file *fp; 754 int error; 755 struct cdevsw *dsw; 756 757 if (vp->v_type == VBLK) 758 return (ENXIO); 759 760 if (dev == NULL) 761 return (ENXIO); 762 763 /* Make this field valid before any I/O in d_open. */ 764 if (dev->si_iosize_max == 0) 765 dev->si_iosize_max = DFLTPHYS; 766 767 if (vn_isdisk(vp, NULL) && 768 ap->a_cred != FSCRED && (ap->a_mode & FWRITE)) { 769 /* 770 * When running in very secure mode, do not allow 771 * opens for writing of any disks. 772 * XXX: should be in geom_dev.c, but we lack the cred there. 773 */ 774 error = securelevel_ge(td->td_ucred, 2); 775 if (error) 776 return (error); 777 } 778 779 dsw = dev_refthread(dev); 780 if (dsw == NULL) 781 return (ENXIO); 782 783 /* XXX: Special casing of ttys for deadfs. Probably redundant. */ 784 if (dsw->d_flags & D_TTY) 785 vp->v_vflag |= VV_ISTTY; 786 787 VOP_UNLOCK(vp, 0, td); 788 789 if(!(dsw->d_flags & D_NEEDGIANT)) { 790 DROP_GIANT(); 791 if (dsw->d_fdopen != NULL) 792 error = dsw->d_fdopen(dev, ap->a_mode, td, ap->a_fdidx); 793 else 794 error = dsw->d_open(dev, ap->a_mode, S_IFCHR, td); 795 PICKUP_GIANT(); 796 } else if (dsw->d_fdopen != NULL) 797 error = dsw->d_fdopen(dev, ap->a_mode, td, ap->a_fdidx); 798 else 799 error = dsw->d_open(dev, ap->a_mode, S_IFCHR, td); 800 801 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, td); 802 803 dev_relthread(dev); 804 805 if (error) 806 return (error); 807 808 if (ap->a_fdidx >= 0) { 809 /* 810 * This is a pretty disgustingly long chain, but I am not 811 * sure there is any better way. Passing the fdidx into 812 * VOP_OPEN() offers us more information than just passing 813 * the file *. 814 */ 815 fp = ap->a_td->td_proc->p_fd->fd_ofiles[ap->a_fdidx]; 816 if (fp->f_ops == &badfileops) { 817 #if 0 818 printf("devfs_open(%s)\n", devtoname(dev)); 819 #endif 820 fp->f_ops = &devfs_ops_f; 821 fp->f_data = dev; 822 } 823 } 824 825 return (error); 826 } 827 828 static int 829 devfs_pathconf(ap) 830 struct vop_pathconf_args /* { 831 struct vnode *a_vp; 832 int a_name; 833 int *a_retval; 834 } */ *ap; 835 { 836 837 switch (ap->a_name) { 838 case _PC_NAME_MAX: 839 *ap->a_retval = NAME_MAX; 840 return (0); 841 case _PC_PATH_MAX: 842 *ap->a_retval = PATH_MAX; 843 return (0); 844 case _PC_MAC_PRESENT: 845 #ifdef MAC 846 /* 847 * If MAC is enabled, devfs automatically supports 848 * trivial non-persistant label storage. 849 */ 850 *ap->a_retval = 1; 851 #else 852 *ap->a_retval = 0; 853 #endif 854 return (0); 855 default: 856 return (vop_stdpathconf(ap)); 857 } 858 /* NOTREACHED */ 859 } 860 861 /* ARGSUSED */ 862 static int 863 devfs_poll_f(struct file *fp, int events, struct ucred *cred, struct thread *td) 864 { 865 struct cdev *dev; 866 struct cdevsw *dsw; 867 int error; 868 869 error = devfs_fp_check(fp, &dev, &dsw); 870 if (error) 871 return (error); 872 if (dsw->d_flags & D_NEEDGIANT) 873 mtx_lock(&Giant); 874 error = dsw->d_poll(dev, events, td); 875 if (dsw->d_flags & D_NEEDGIANT) 876 mtx_unlock(&Giant); 877 dev_relthread(dev); 878 return(error); 879 } 880 881 /* 882 * Print out the contents of a special device vnode. 883 */ 884 static int 885 devfs_print(ap) 886 struct vop_print_args /* { 887 struct vnode *a_vp; 888 } */ *ap; 889 { 890 891 printf("\tdev %s\n", devtoname(ap->a_vp->v_rdev)); 892 return (0); 893 } 894 895 /* 896 * Vnode op for read 897 */ 898 /* ARGSUSED */ 899 static int 900 devfs_read_f(struct file *fp, struct uio *uio, struct ucred *cred, int flags, struct thread *td) 901 { 902 struct cdev *dev; 903 int ioflag, error, resid; 904 struct cdevsw *dsw; 905 906 error = devfs_fp_check(fp, &dev, &dsw); 907 if (error) 908 return (error); 909 resid = uio->uio_resid; 910 ioflag = 0; 911 if (fp->f_flag & FNONBLOCK) 912 ioflag |= IO_NDELAY; 913 if (fp->f_flag & O_DIRECT) 914 ioflag |= IO_DIRECT; 915 916 if ((flags & FOF_OFFSET) == 0) 917 uio->uio_offset = fp->f_offset; 918 919 if (dsw->d_flags & D_NEEDGIANT) 920 mtx_lock(&Giant); 921 error = dsw->d_read(dev, uio, ioflag); 922 if (dsw->d_flags & D_NEEDGIANT) 923 mtx_unlock(&Giant); 924 dev_relthread(dev); 925 if (uio->uio_resid != resid || (error == 0 && resid != 0)) 926 vfs_timestamp(&dev->si_atime); 927 928 if ((flags & FOF_OFFSET) == 0) 929 fp->f_offset = uio->uio_offset; 930 fp->f_nextoff = uio->uio_offset; 931 return (error); 932 } 933 934 static int 935 devfs_readdir(ap) 936 struct vop_readdir_args /* { 937 struct vnode *a_vp; 938 struct uio *a_uio; 939 struct ucred *a_cred; 940 int *a_eofflag; 941 int *a_ncookies; 942 u_long **a_cookies; 943 } */ *ap; 944 { 945 int error; 946 struct uio *uio; 947 struct dirent *dp; 948 struct devfs_dirent *dd; 949 struct devfs_dirent *de; 950 struct devfs_mount *dmp; 951 off_t off, oldoff; 952 int ncookies = 0; 953 u_long *cookiebuf, *cookiep; 954 struct dirent *dps, *dpe; 955 956 if (ap->a_vp->v_type != VDIR) 957 return (ENOTDIR); 958 959 uio = ap->a_uio; 960 if (uio->uio_offset < 0) 961 return (EINVAL); 962 963 dmp = VFSTODEVFS(ap->a_vp->v_mount); 964 lockmgr(&dmp->dm_lock, LK_SHARED, 0, curthread); 965 devfs_populate(dmp); 966 error = 0; 967 de = ap->a_vp->v_data; 968 off = 0; 969 oldoff = uio->uio_offset; 970 TAILQ_FOREACH(dd, &de->de_dlist, de_list) { 971 if (dd->de_flags & DE_WHITEOUT) 972 continue; 973 if (dd->de_dirent->d_type == DT_DIR) 974 de = dd->de_dir; 975 else 976 de = dd; 977 dp = dd->de_dirent; 978 if (dp->d_reclen > uio->uio_resid) 979 break; 980 dp->d_fileno = de->de_inode; 981 if (off >= uio->uio_offset) { 982 ncookies++; 983 error = uiomove(dp, dp->d_reclen, uio); 984 if (error) 985 break; 986 } 987 off += dp->d_reclen; 988 } 989 if( !error && ap->a_ncookies != NULL && ap->a_cookies != NULL ) { 990 MALLOC(cookiebuf, u_long *, ncookies * sizeof(u_long), 991 M_TEMP, M_WAITOK); 992 cookiep = cookiebuf; 993 dps = (struct dirent *)((char *)uio->uio_iov->iov_base - 994 (uio->uio_offset - oldoff)); 995 dpe = (struct dirent *) uio->uio_iov->iov_base; 996 for( dp = dps; 997 dp < dpe; 998 dp = (struct dirent *)((caddr_t) dp + dp->d_reclen)) { 999 oldoff += dp->d_reclen; 1000 *cookiep++ = (u_long) oldoff; 1001 } 1002 *ap->a_ncookies = ncookies; 1003 *ap->a_cookies = cookiebuf; 1004 } 1005 lockmgr(&dmp->dm_lock, LK_RELEASE, 0, curthread); 1006 uio->uio_offset = off; 1007 return (error); 1008 } 1009 1010 static int 1011 devfs_readlink(ap) 1012 struct vop_readlink_args /* { 1013 struct vnode *a_vp; 1014 struct uio *a_uio; 1015 struct ucred *a_cead; 1016 } */ *ap; 1017 { 1018 int error; 1019 struct devfs_dirent *de; 1020 1021 de = ap->a_vp->v_data; 1022 error = uiomove(de->de_symlink, strlen(de->de_symlink), ap->a_uio); 1023 return (error); 1024 } 1025 1026 static int 1027 devfs_reclaim(ap) 1028 struct vop_reclaim_args /* { 1029 struct vnode *a_vp; 1030 } */ *ap; 1031 { 1032 struct vnode *vp = ap->a_vp; 1033 struct devfs_dirent *de; 1034 int i; 1035 1036 de = vp->v_data; 1037 if (de != NULL) 1038 de->de_vnode = NULL; 1039 vp->v_data = NULL; 1040 if (vp->v_rdev != NULL) { 1041 i = vcount(vp); 1042 if ((vp->v_rdev->si_flags & SI_CHEAPCLONE) && i == 0 && 1043 (vp->v_rdev->si_flags & SI_NAMED)) 1044 destroy_dev(vp->v_rdev); 1045 } 1046 return (0); 1047 } 1048 1049 static int 1050 devfs_remove(ap) 1051 struct vop_remove_args /* { 1052 struct vnode *a_dvp; 1053 struct vnode *a_vp; 1054 struct componentname *a_cnp; 1055 } */ *ap; 1056 { 1057 struct vnode *vp = ap->a_vp; 1058 struct devfs_dirent *dd; 1059 struct devfs_dirent *de; 1060 struct devfs_mount *dmp = VFSTODEVFS(vp->v_mount); 1061 1062 lockmgr(&dmp->dm_lock, LK_EXCLUSIVE, 0, curthread); 1063 dd = ap->a_dvp->v_data; 1064 de = vp->v_data; 1065 if (de->de_dirent->d_type == DT_LNK) { 1066 TAILQ_REMOVE(&dd->de_dlist, de, de_list); 1067 if (de->de_vnode) 1068 de->de_vnode->v_data = NULL; 1069 #ifdef MAC 1070 mac_destroy_devfsdirent(de); 1071 #endif 1072 FREE(de, M_DEVFS); 1073 } else { 1074 de->de_flags |= DE_WHITEOUT; 1075 } 1076 lockmgr(&dmp->dm_lock, LK_RELEASE, 0, curthread); 1077 return (0); 1078 } 1079 1080 /* 1081 * Revoke is called on a tty when a terminal session ends. The vnode 1082 * is orphaned by setting v_op to deadfs so we need to let go of it 1083 * as well so that we create a new one next time around. 1084 */ 1085 static int 1086 devfs_revoke(ap) 1087 struct vop_revoke_args /* { 1088 struct vnode *a_vp; 1089 int a_flags; 1090 } */ *ap; 1091 { 1092 struct vnode *vp = ap->a_vp; 1093 struct vnode *vq; 1094 struct devfs_dirent *de; 1095 struct cdev *dev; 1096 1097 KASSERT((ap->a_flags & REVOKEALL) != 0, ("devfs_revoke !REVOKEALL")); 1098 de = vp->v_data; 1099 de->de_vnode = NULL; 1100 1101 VI_LOCK(vp); 1102 /* 1103 * If a vgone (or vclean) is already in progress, 1104 * wait until it is done and return. 1105 */ 1106 if (vp->v_iflag & VI_XLOCK) { 1107 vp->v_iflag |= VI_XWANT; 1108 msleep(vp, VI_MTX(vp), PINOD | PDROP, "vop_revokeall", 0); 1109 return (0); 1110 } 1111 VI_UNLOCK(vp); 1112 dev = vp->v_rdev; 1113 for (;;) { 1114 dev_lock(); 1115 vq = SLIST_FIRST(&dev->si_hlist); 1116 dev_unlock(); 1117 if (vq == NULL) 1118 break; 1119 vgone(vq); 1120 } 1121 return (0); 1122 } 1123 1124 static int 1125 devfs_rioctl(ap) 1126 struct vop_ioctl_args /* { 1127 struct vnode *a_vp; 1128 u_long a_command; 1129 caddr_t a_data; 1130 int a_fflag; 1131 struct ucred *a_cred; 1132 struct thread *a_td; 1133 } */ *ap; 1134 { 1135 int error; 1136 struct devfs_mount *dmp; 1137 1138 dmp = VFSTODEVFS(ap->a_vp->v_mount); 1139 lockmgr(&dmp->dm_lock, LK_SHARED, 0, curthread); 1140 devfs_populate(dmp); 1141 lockmgr(&dmp->dm_lock, LK_RELEASE, 0, curthread); 1142 error = devfs_rules_ioctl(ap->a_vp->v_mount, ap->a_command, ap->a_data, 1143 ap->a_td); 1144 return (error); 1145 } 1146 1147 static int 1148 devfs_rread(ap) 1149 struct vop_read_args /* { 1150 struct vnode *a_vp; 1151 struct uio *a_uio; 1152 int a_ioflag; 1153 struct ucred *a_cred; 1154 } */ *ap; 1155 { 1156 1157 if (ap->a_vp->v_type != VDIR) 1158 return (EINVAL); 1159 return (VOP_READDIR(ap->a_vp, ap->a_uio, ap->a_cred, NULL, NULL, NULL)); 1160 } 1161 1162 static int 1163 devfs_setattr(ap) 1164 struct vop_setattr_args /* { 1165 struct vnode *a_vp; 1166 struct vattr *a_vap; 1167 struct ucred *a_cred; 1168 struct proc *a_p; 1169 } */ *ap; 1170 { 1171 struct devfs_dirent *de; 1172 struct vattr *vap; 1173 struct vnode *vp; 1174 int c, error; 1175 uid_t uid; 1176 gid_t gid; 1177 1178 vap = ap->a_vap; 1179 vp = ap->a_vp; 1180 if ((vap->va_type != VNON) || 1181 (vap->va_nlink != VNOVAL) || 1182 (vap->va_fsid != VNOVAL) || 1183 (vap->va_fileid != VNOVAL) || 1184 (vap->va_blocksize != VNOVAL) || 1185 (vap->va_flags != VNOVAL && vap->va_flags != 0) || 1186 (vap->va_rdev != VNOVAL) || 1187 ((int)vap->va_bytes != VNOVAL) || 1188 (vap->va_gen != VNOVAL)) { 1189 return (EINVAL); 1190 } 1191 1192 de = vp->v_data; 1193 if (vp->v_type == VDIR) 1194 de = de->de_dir; 1195 1196 error = c = 0; 1197 if (vap->va_uid == (uid_t)VNOVAL) 1198 uid = de->de_uid; 1199 else 1200 uid = vap->va_uid; 1201 if (vap->va_gid == (gid_t)VNOVAL) 1202 gid = de->de_gid; 1203 else 1204 gid = vap->va_gid; 1205 if (uid != de->de_uid || gid != de->de_gid) { 1206 if (((ap->a_cred->cr_uid != de->de_uid) || uid != de->de_uid || 1207 (gid != de->de_gid && !groupmember(gid, ap->a_cred))) && 1208 (error = suser_cred(ap->a_td->td_ucred, SUSER_ALLOWJAIL)) != 0) 1209 return (error); 1210 de->de_uid = uid; 1211 de->de_gid = gid; 1212 c = 1; 1213 } 1214 1215 if (vap->va_mode != (mode_t)VNOVAL) { 1216 if ((ap->a_cred->cr_uid != de->de_uid) && 1217 (error = suser_cred(ap->a_td->td_ucred, SUSER_ALLOWJAIL))) 1218 return (error); 1219 de->de_mode = vap->va_mode; 1220 c = 1; 1221 } 1222 1223 if (vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL) { 1224 /* See the comment in ufs_vnops::ufs_setattr(). */ 1225 if ((error = VOP_ACCESS(vp, VADMIN, ap->a_cred, ap->a_td)) && 1226 ((vap->va_vaflags & VA_UTIMES_NULL) == 0 || 1227 (error = VOP_ACCESS(vp, VWRITE, ap->a_cred, ap->a_td)))) 1228 return (error); 1229 if (vap->va_atime.tv_sec != VNOVAL) { 1230 if (vp->v_type == VCHR) 1231 vp->v_rdev->si_atime = vap->va_atime; 1232 else 1233 de->de_atime = vap->va_atime; 1234 } 1235 if (vap->va_mtime.tv_sec != VNOVAL) { 1236 if (vp->v_type == VCHR) 1237 vp->v_rdev->si_mtime = vap->va_mtime; 1238 else 1239 de->de_mtime = vap->va_mtime; 1240 } 1241 c = 1; 1242 } 1243 1244 if (c) { 1245 if (vp->v_type == VCHR) 1246 vfs_timestamp(&vp->v_rdev->si_ctime); 1247 else 1248 vfs_timestamp(&de->de_mtime); 1249 } 1250 return (0); 1251 } 1252 1253 #ifdef MAC 1254 static int 1255 devfs_setlabel(ap) 1256 struct vop_setlabel_args /* { 1257 struct vnode *a_vp; 1258 struct mac *a_label; 1259 struct ucred *a_cred; 1260 struct thread *a_td; 1261 } */ *ap; 1262 { 1263 struct vnode *vp; 1264 struct devfs_dirent *de; 1265 1266 vp = ap->a_vp; 1267 de = vp->v_data; 1268 1269 mac_relabel_vnode(ap->a_cred, vp, ap->a_label); 1270 mac_update_devfsdirent(vp->v_mount, de, vp); 1271 1272 return (0); 1273 } 1274 #endif 1275 1276 static int 1277 devfs_stat_f(struct file *fp, struct stat *sb, struct ucred *cred, struct thread *td) 1278 { 1279 1280 return (vnops.fo_stat(fp, sb, cred, td)); 1281 } 1282 1283 static int 1284 devfs_symlink(ap) 1285 struct vop_symlink_args /* { 1286 struct vnode *a_dvp; 1287 struct vnode **a_vpp; 1288 struct componentname *a_cnp; 1289 struct vattr *a_vap; 1290 char *a_target; 1291 } */ *ap; 1292 { 1293 int i, error; 1294 struct devfs_dirent *dd; 1295 struct devfs_dirent *de; 1296 struct devfs_mount *dmp; 1297 struct thread *td; 1298 1299 td = ap->a_cnp->cn_thread; 1300 KASSERT(td == curthread, ("devfs_symlink: td != curthread")); 1301 error = suser(td); 1302 if (error) 1303 return(error); 1304 dmp = VFSTODEVFS(ap->a_dvp->v_mount); 1305 dd = ap->a_dvp->v_data; 1306 de = devfs_newdirent(ap->a_cnp->cn_nameptr, ap->a_cnp->cn_namelen); 1307 de->de_uid = 0; 1308 de->de_gid = 0; 1309 de->de_mode = 0755; 1310 de->de_inode = dmp->dm_inode++; 1311 de->de_dirent->d_type = DT_LNK; 1312 i = strlen(ap->a_target) + 1; 1313 MALLOC(de->de_symlink, char *, i, M_DEVFS, M_WAITOK); 1314 bcopy(ap->a_target, de->de_symlink, i); 1315 lockmgr(&dmp->dm_lock, LK_EXCLUSIVE, 0, td); 1316 #ifdef MAC 1317 mac_create_devfs_symlink(ap->a_cnp->cn_cred, dmp->dm_mount, dd, de); 1318 #endif 1319 TAILQ_INSERT_TAIL(&dd->de_dlist, de, de_list); 1320 devfs_allocv(de, ap->a_dvp->v_mount, ap->a_vpp, td); 1321 lockmgr(&dmp->dm_lock, LK_RELEASE, 0, td); 1322 return (0); 1323 } 1324 1325 /* 1326 * Vnode op for write 1327 */ 1328 /* ARGSUSED */ 1329 static int 1330 devfs_write_f(struct file *fp, struct uio *uio, struct ucred *cred, int flags, struct thread *td) 1331 { 1332 struct cdev *dev; 1333 struct vnode *vp; 1334 int error, ioflag, resid; 1335 struct cdevsw *dsw; 1336 1337 error = devfs_fp_check(fp, &dev, &dsw); 1338 if (error) 1339 return (error); 1340 KASSERT(uio->uio_td == td, ("uio_td %p is not td %p", uio->uio_td, td)); 1341 vp = fp->f_vnode; 1342 ioflag = IO_UNIT; 1343 if (fp->f_flag & FNONBLOCK) 1344 ioflag |= IO_NDELAY; 1345 if (fp->f_flag & O_DIRECT) 1346 ioflag |= IO_DIRECT; 1347 if ((fp->f_flag & O_FSYNC) || 1348 (vp->v_mount && (vp->v_mount->mnt_flag & MNT_SYNCHRONOUS))) 1349 ioflag |= IO_SYNC; 1350 if ((flags & FOF_OFFSET) == 0) 1351 uio->uio_offset = fp->f_offset; 1352 1353 resid = uio->uio_resid; 1354 1355 if (dsw->d_flags & D_NEEDGIANT) 1356 mtx_lock(&Giant); 1357 error = dsw->d_write(dev, uio, ioflag); 1358 if (dsw->d_flags & D_NEEDGIANT) 1359 mtx_unlock(&Giant); 1360 dev_relthread(dev); 1361 if (uio->uio_resid != resid || (error == 0 && resid != 0)) { 1362 vfs_timestamp(&dev->si_ctime); 1363 dev->si_mtime = dev->si_ctime; 1364 } 1365 1366 if ((flags & FOF_OFFSET) == 0) 1367 fp->f_offset = uio->uio_offset; 1368 fp->f_nextoff = uio->uio_offset; 1369 return (error); 1370 } 1371 1372 static struct vnodeopv_entry_desc devfs_vnodeop_entries[] = { 1373 { &vop_default_desc, (vop_t *) vop_defaultop }, 1374 { &vop_access_desc, (vop_t *) devfs_access }, 1375 { &vop_getattr_desc, (vop_t *) devfs_getattr }, 1376 { &vop_ioctl_desc, (vop_t *) devfs_rioctl }, 1377 { &vop_lookup_desc, (vop_t *) devfs_lookup }, 1378 { &vop_mknod_desc, (vop_t *) devfs_mknod }, 1379 { &vop_pathconf_desc, (vop_t *) devfs_pathconf }, 1380 { &vop_read_desc, (vop_t *) devfs_rread }, 1381 { &vop_readdir_desc, (vop_t *) devfs_readdir }, 1382 { &vop_readlink_desc, (vop_t *) devfs_readlink }, 1383 { &vop_reclaim_desc, (vop_t *) devfs_reclaim }, 1384 { &vop_remove_desc, (vop_t *) devfs_remove }, 1385 { &vop_revoke_desc, (vop_t *) devfs_revoke }, 1386 { &vop_setattr_desc, (vop_t *) devfs_setattr }, 1387 #ifdef MAC 1388 { &vop_setlabel_desc, (vop_t *) devfs_setlabel }, 1389 #endif 1390 { &vop_symlink_desc, (vop_t *) devfs_symlink }, 1391 { NULL, NULL } 1392 }; 1393 1394 static struct vnodeopv_desc devfs_vnodeop_opv_desc = 1395 { &devfs_vnodeop_p, devfs_vnodeop_entries }; 1396 1397 VNODEOP_SET(devfs_vnodeop_opv_desc); 1398 1399 static struct vnodeopv_entry_desc devfs_specop_entries[] = { 1400 { &vop_default_desc, (vop_t *) vop_defaultop }, 1401 { &vop_access_desc, (vop_t *) devfs_access }, 1402 { &vop_advlock_desc, (vop_t *) devfs_advlock }, 1403 { &vop_bmap_desc, (vop_t *) vop_panic }, 1404 { &vop_close_desc, (vop_t *) devfs_close }, 1405 { &vop_create_desc, (vop_t *) vop_panic }, 1406 { &vop_fsync_desc, (vop_t *) devfs_fsync }, 1407 { &vop_getattr_desc, (vop_t *) devfs_getattr }, 1408 { &vop_lease_desc, (vop_t *) vop_null }, 1409 { &vop_link_desc, (vop_t *) vop_panic }, 1410 { &vop_mkdir_desc, (vop_t *) vop_panic }, 1411 { &vop_mknod_desc, (vop_t *) vop_panic }, 1412 { &vop_open_desc, (vop_t *) devfs_open }, 1413 { &vop_pathconf_desc, (vop_t *) devfs_pathconf }, 1414 { &vop_print_desc, (vop_t *) devfs_print }, 1415 { &vop_readdir_desc, (vop_t *) vop_panic }, 1416 { &vop_readlink_desc, (vop_t *) vop_panic }, 1417 { &vop_reallocblks_desc, (vop_t *) vop_panic }, 1418 { &vop_reclaim_desc, (vop_t *) devfs_reclaim }, 1419 { &vop_remove_desc, (vop_t *) devfs_remove }, 1420 { &vop_rename_desc, (vop_t *) vop_panic }, 1421 { &vop_revoke_desc, (vop_t *) devfs_revoke }, 1422 { &vop_rmdir_desc, (vop_t *) vop_panic }, 1423 { &vop_setattr_desc, (vop_t *) devfs_setattr }, 1424 #ifdef MAC 1425 { &vop_setlabel_desc, (vop_t *) devfs_setlabel }, 1426 #endif 1427 { &vop_strategy_desc, (vop_t *) vop_panic }, 1428 { &vop_symlink_desc, (vop_t *) vop_panic }, 1429 { NULL, NULL } 1430 }; 1431 1432 static struct vnodeopv_desc devfs_specop_opv_desc = 1433 { &devfs_specop_p, devfs_specop_entries }; 1434 1435 VNODEOP_SET(devfs_specop_opv_desc); 1436