bsd/miscfs/fdesc/fdesc_vnops.c

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
   7  *
   8  * This file contains Original Code and/or Modifications of Original Code
   9  * as defined in and that are subject to the Apple Public Source License
  10  * Version 2.0 (the 'License'). You may not use this file except in
  11  * compliance with the License. Please obtain a copy of the License at
  12  * http://www.opensource.apple.com/apsl/ and read it before using this
  13  * file.
  14  *
  15  * The Original Code and all software distributed under the License are
  16  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  17  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  18  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  20  * Please see the License for the specific language governing rights and
  21  * limitations under the License.
  22  *
  23  * @APPLE_LICENSE_HEADER_END@
  24  */
  25 /* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
  26 /*
  27  * Copyright (c) 1992, 1993
  28  *      The Regents of the University of California.  All rights reserved.
  29  *
  30  * This code is derived from software donated to Berkeley by
  31  * Jan-Simon Pendry.
  32  *
  33  * Redistribution and use in source and binary forms, with or without
  34  * modification, are permitted provided that the following conditions
  35  * are met:
  36  * 1. Redistributions of source code must retain the above copyright
  37  *    notice, this list of conditions and the following disclaimer.
  38  * 2. Redistributions in binary form must reproduce the above copyright
  39  *    notice, this list of conditions and the following disclaimer in the
  40  *    documentation and/or other materials provided with the distribution.
  41  * 3. All advertising materials mentioning features or use of this software
  42  *    must display the following acknowledgement:
  43  *      This product includes software developed by the University of
  44  *      California, Berkeley and its contributors.
  45  * 4. Neither the name of the University nor the names of its contributors
  46  *    may be used to endorse or promote products derived from this software
  47  *    without specific prior written permission.
  48  *
  49  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  50  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  51  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  52  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  53  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  54  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  55  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  56  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  57  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  58  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  59  * SUCH DAMAGE.
  60  *
  61  *      @(#)fdesc_vnops.c       8.17 (Berkeley) 5/22/95
  62  *
  63  */
  64
  65 /*
  66  * /dev/fd Filesystem
  67  */
  68
  69 #include <sys/param.h>
  70 #include <sys/systm.h>
  71 #include <sys/types.h>
  72 #include <sys/time.h>
  73 #include <sys/proc.h>
  74 #include <sys/kernel.h> /* boottime */
  75 #include <sys/resourcevar.h>
  76 #include <sys/filedesc.h>
  77 #include <sys/vnode.h>
  78 #include <sys/malloc.h>
  79 #include <sys/file.h>
  80 #include <sys/stat.h>
  81 #include <sys/mount.h>
  82 #include <sys/namei.h>
  83 #include <sys/buf.h>
  84 #include <sys/dirent.h>
  85 #include <sys/ubc.h>
  86 #include <miscfs/fdesc/fdesc.h>
  87 #include <vfs/vfs_support.h>
  88
  89 #define FDL_WANT        0x01
  90 #define FDL_LOCKED      0x02
  91 static int fdcache_lock;
  92
  93
  94 #if (FD_STDIN != FD_STDOUT-1) || (FD_STDOUT != FD_STDERR-1)
  95 FD_STDIN, FD_STDOUT, FD_STDERR must be a sequence n, n+1, n+2
  96 #endif
  97
  98 #define NFDCACHE 3
  99
 100 #define FD_NHASH(ix) \
 101         (&fdhashtbl[(ix) & fdhash])
 102 LIST_HEAD(fdhashhead, fdescnode) *fdhashtbl;
 103 u_long fdhash;
 104
 105 /*
 106  * Initialise cache headers
 107  */
 108 fdesc_init(vfsp)
 109         struct vfsconf *vfsp;
 110 {
 111
 112         fdhashtbl = hashinit(NFDCACHE, M_CACHE, &fdhash);
 113 }
 114
 115 int
 116 fdesc_allocvp(ftype, ix, mp, vpp)
 117         fdntype ftype;
 118         int ix;
 119         struct mount *mp;
 120         struct vnode **vpp;
 121 {
 122         struct proc *p = current_proc();        /* XXX */
 123         struct fdhashhead *fc;
 124         struct fdescnode *fd;
 125         int error = 0;
 126
 127         fc = FD_NHASH(ix);
 128 loop:
 129         for (fd = fc->lh_first; fd != 0; fd = fd->fd_hash.le_next) {
 130                 if (fd->fd_ix == ix && fd->fd_vnode->v_mount == mp) {
 131                         if (vget(fd->fd_vnode, 0, p))
 132                                 goto loop;
 133                         *vpp = fd->fd_vnode;
 134                         return (error);
 135                 }
 136         }
 137
 138         /*
 139          * otherwise lock the array while we call getnewvnode
 140          * since that can block.
 141          */
 142         if (fdcache_lock & FDL_LOCKED) {
 143                 fdcache_lock |= FDL_WANT;
 144                 sleep((caddr_t) &fdcache_lock, PINOD);
 145                 goto loop;
 146         }
 147         fdcache_lock |= FDL_LOCKED;
 148
 149         MALLOC(fd, void *, sizeof(struct fdescnode), M_TEMP, M_WAITOK);
 150         error = getnewvnode(VT_FDESC, mp, fdesc_vnodeop_p, vpp);
 151         if (error) {
 152                 FREE(fd, M_TEMP);
 153                 goto out;
 154         }
 155         (*vpp)->v_data = fd;
 156         fd->fd_vnode = *vpp;
 157         fd->fd_type = ftype;
 158         fd->fd_fd = -1;
 159         fd->fd_link = 0;
 160         fd->fd_ix = ix;
 161         LIST_INSERT_HEAD(fc, fd, fd_hash);
 162
 163 out:
 164         fdcache_lock &= ~FDL_LOCKED;
 165
 166         if (fdcache_lock & FDL_WANT) {
 167                 fdcache_lock &= ~FDL_WANT;
 168                 wakeup((caddr_t) &fdcache_lock);
 169         }
 170
 171         return (error);
 172 }
 173
 174 /*
 175  * vp is the current namei directory
 176  * ndp is the name to locate in that directory...
 177  */
 178 int
 179 fdesc_lookup(ap)
 180         struct vop_lookup_args /* {
 181                 struct vnode * a_dvp;
 182                 struct vnode ** a_vpp;
 183                 struct componentname * a_cnp;
 184         } */ *ap;
 185 {
 186         struct vnode **vpp = ap->a_vpp;
 187         struct vnode *dvp = ap->a_dvp;
 188         struct componentname *cnp = ap->a_cnp;
 189         char *pname = cnp->cn_nameptr;
 190         struct proc *p = cnp->cn_proc;
 191         int nfiles = p->p_fd->fd_nfiles;
 192         unsigned fd;
 193         int error;
 194         struct vnode *fvp;
 195         char *ln;
 196
 197         VOP_UNLOCK(dvp, 0, p);
 198         if (cnp->cn_namelen == 1 && *pname == '.') {
 199                 *vpp = dvp;
 200                 VREF(dvp);
 201                 vn_lock(dvp, LK_SHARED | LK_RETRY, p);
 202                 return (0);
 203         }
 204
 205         switch (VTOFDESC(dvp)->fd_type) {
 206         default:
 207         case Flink:
 208         case Fdesc:
 209                 error = ENOTDIR;
 210                 goto bad;
 211
 212         case Froot:
 213                 if (cnp->cn_namelen == 2 && bcmp(pname, "fd", 2) == 0) {
 214                         error = fdesc_allocvp(Fdevfd, FD_DEVFD, dvp->v_mount, &fvp);
 215                         if (error)
 216                                 goto bad;
 217                         *vpp = fvp;
 218                         fvp->v_type = VDIR;
 219                         vn_lock(fvp, LK_SHARED | LK_RETRY, p);
 220                         return (0);
 221                 }
 222
 223                 ln = 0;
 224                 switch (cnp->cn_namelen) {
 225                 case 5:
 226                         if (bcmp(pname, "stdin", 5) == 0) {
 227                                 ln = "fd/0";
 228                                 fd = FD_STDIN;
 229                         }
 230                         break;
 231                 case 6:
 232                         if (bcmp(pname, "stdout", 6) == 0) {
 233                                 ln = "fd/1";
 234                                 fd = FD_STDOUT;
 235                         } else
 236                         if (bcmp(pname, "stderr", 6) == 0) {
 237                                 ln = "fd/2";
 238                                 fd = FD_STDERR;
 239                         }
 240                         break;
 241                 }
 242
 243                 if (ln) {
 244                         error = fdesc_allocvp(Flink, fd, dvp->v_mount, &fvp);
 245                         if (error)
 246                                 goto bad;
 247                         VTOFDESC(fvp)->fd_link = ln;
 248                         *vpp = fvp;
 249                         fvp->v_type = VLNK;
 250                         vn_lock(fvp, LK_SHARED | LK_RETRY, p);
 251                         return (0);
 252                 } else {
 253                         error = ENOENT;
 254                         goto bad;
 255                 }
 256
 257                 /* FALL THROUGH */
 258
 259         case Fdevfd:
 260                 if (cnp->cn_namelen == 2 && bcmp(pname, "..", 2) == 0) {
 261                         if (error = fdesc_root(dvp->v_mount, vpp))
 262                                 goto bad;
 263                         return (0);
 264                 }
 265
 266                 fd = 0;
 267                 while (*pname >= '0' && *pname <= '9') {
 268                         fd = 10 * fd + *pname++ - '0';
 269                         if (fd >= nfiles)
 270                                 break;
 271                 }
 272
 273                 if (*pname != '\0') {
 274                         error = ENOENT;
 275                         goto bad;
 276                 }
 277
 278                 if (fd >= nfiles ||
 279                                 *fdfile(p, fd) == NULL ||
 280                                 (*fdflags(p, fd) & UF_RESERVED)) {
 281                         error = EBADF;
 282                         goto bad;
 283                 }
 284
 285                 error = fdesc_allocvp(Fdesc, FD_DESC+fd, dvp->v_mount, &fvp);
 286                 if (error)
 287                         goto bad;
 288                 VTOFDESC(fvp)->fd_fd = fd;
 289                 vn_lock(fvp, LK_SHARED | LK_RETRY, p);
 290                 *vpp = fvp;
 291                 return (0);
 292         }
 293
 294 bad:;
 295         vn_lock(dvp, LK_SHARED | LK_RETRY, p);
 296         *vpp = NULL;
 297         return (error);
 298 }
 299
 300 int
 301 fdesc_open(ap)
 302         struct vop_open_args /* {
 303                 struct vnode *a_vp;
 304                 int  a_mode;
 305                 struct ucred *a_cred;
 306                 struct proc *a_p;
 307         } */ *ap;
 308 {
 309         struct vnode *vp = ap->a_vp;
 310         int error = 0;
 311
 312         switch (VTOFDESC(vp)->fd_type) {
 313         case Fdesc:
 314                 /*
 315                  * XXX Kludge: set p->p_dupfd to contain the value of the
 316                  * the file descriptor being sought for duplication. The error
 317                  * return ensures that the vnode for this device will be
 318                  * released by vn_open. Open will detect this special error and
 319                  * take the actions in dupfdopen.  Other callers of vn_open or
 320                  * VOP_OPEN will simply report the error.
 321                  */
 322                 ap->a_p->p_dupfd = VTOFDESC(vp)->fd_fd; /* XXX */
 323                 error = ENODEV;
 324                 break;
 325
 326         }
 327
 328         return (error);
 329 }
 330
 331 static int
 332 fdesc_attr(fd, vap, cred, p)
 333         int fd;
 334         struct vattr *vap;
 335         struct ucred *cred;
 336         struct proc *p;
 337 {
 338         struct file *fp;
 339         struct stat stb;
 340         int error;
 341
 342         if (error = fdgetf(p, fd, &fp))
 343                 return (error);
 344         switch (fp->f_type) {
 345         case DTYPE_VNODE:
 346                 error = VOP_GETATTR((struct vnode *) fp->f_data, vap, cred, p);
 347                 if (error == 0 && vap->va_type == VDIR) {
 348                         /*
 349                          * directories can cause loops in the namespace,
 350                          * so turn off the 'x' bits to avoid trouble.
 351                          */
 352                         vap->va_mode &= ~((VEXEC)|(VEXEC>>3)|(VEXEC>>6));
 353                 }
 354                 break;
 355
 356         case DTYPE_SOCKET:
 357                 error = soo_stat((struct socket *)fp->f_data, &stb);
 358                 if (error == 0) {
 359                         vattr_null(vap);
 360                         vap->va_type = VSOCK;
 361                         vap->va_mode = stb.st_mode;
 362                         vap->va_nlink = stb.st_nlink;
 363                         vap->va_uid = stb.st_uid;
 364                         vap->va_gid = stb.st_gid;
 365                         vap->va_fsid = stb.st_dev;
 366                         vap->va_fileid = stb.st_ino;
 367                         vap->va_size = stb.st_size;
 368                         vap->va_blocksize = stb.st_blksize;
 369                         vap->va_atime = stb.st_atimespec;
 370                         vap->va_mtime = stb.st_mtimespec;
 371                         vap->va_ctime = stb.st_ctimespec;
 372                         vap->va_gen = stb.st_gen;
 373                         vap->va_flags = stb.st_flags;
 374                         vap->va_rdev = stb.st_rdev;
 375                         vap->va_bytes = stb.st_blocks * stb.st_blksize;
 376                 }
 377                 break;
 378
 379         default:
 380                 return (EBADF);
 381                 break;
 382         }
 383
 384         return (error);
 385 }
 386
 387 int
 388 fdesc_getattr(ap)
 389         struct vop_getattr_args /* {
 390                 struct vnode *a_vp;
 391                 struct vattr *a_vap;
 392                 struct ucred *a_cred;
 393                 struct proc *a_p;
 394         } */ *ap;
 395 {
 396         struct vnode *vp = ap->a_vp;
 397         struct vattr *vap = ap->a_vap;
 398         unsigned fd;
 399         int error = 0;
 400
 401         switch (VTOFDESC(vp)->fd_type) {
 402         case Froot:
 403         case Fdevfd:
 404         case Flink:
 405                 bzero((caddr_t) vap, sizeof(*vap));
 406                 vattr_null(vap);
 407                 vap->va_fileid = VTOFDESC(vp)->fd_ix;
 408
 409                 vap->va_uid = 0;
 410                 vap->va_gid = 0;
 411                 vap->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0];
 412                 vap->va_blocksize = DEV_BSIZE;
 413                 vap->va_atime.tv_sec = boottime.tv_sec;
 414                 vap->va_atime.tv_nsec = 0;
 415                 vap->va_mtime = vap->va_atime;
 416                 vap->va_ctime = vap->va_mtime;
 417                 vap->va_gen = 0;
 418                 vap->va_flags = 0;
 419                 vap->va_rdev = 0;
 420                 vap->va_bytes = 0;
 421
 422                 switch (VTOFDESC(vp)->fd_type) {
 423                 case Flink:
 424                         vap->va_mode = S_IRUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH;
 425                         vap->va_type = VLNK;
 426                         vap->va_nlink = 1;
 427                         vap->va_size = strlen(VTOFDESC(vp)->fd_link);
 428                         break;
 429
 430                 default:
 431                         vap->va_mode = S_IRUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH;
 432                         vap->va_type = VDIR;
 433                         vap->va_nlink = 2;
 434                         vap->va_size = DEV_BSIZE;
 435                         break;
 436                 }
 437                 break;
 438
 439         case Fdesc:
 440                 fd = VTOFDESC(vp)->fd_fd;
 441                 error = fdesc_attr(fd, vap, ap->a_cred, ap->a_p);
 442                 break;
 443
 444         default:
 445                 return (EBADF);
 446                 break;
 447         }
 448
 449         if (error == 0) {
 450                 vp->v_type = vap->va_type;
 451         }
 452
 453         return (error);
 454 }
 455
 456 int
 457 fdesc_setattr(ap)
 458         struct vop_setattr_args /* {
 459                 struct vnode *a_vp;
 460                 struct vattr *a_vap;
 461                 struct ucred *a_cred;
 462                 struct proc *a_p;
 463         } */ *ap;
 464 {
 465         struct file *fp;
 466         unsigned fd;
 467         int error;
 468
 469         /*
 470          * Can't mess with the root vnode
 471          */
 472         switch (VTOFDESC(ap->a_vp)->fd_type) {
 473         case Fdesc:
 474                 break;
 475
 476         default:
 477                 return (EACCES);
 478         }
 479
 480         fd = VTOFDESC(ap->a_vp)->fd_fd;
 481         if (error = fdgetf(ap->a_p, fd, &fp))
 482                 return (error);
 483
 484         /*
 485          * Can setattr the underlying vnode, but not sockets!
 486          */
 487         switch (fp->f_type) {
 488         case DTYPE_VNODE:
 489                 error = VOP_SETATTR((struct vnode *) fp->f_data, ap->a_vap, ap->a_cred, ap->a_p);
 490                 break;
 491
 492         case DTYPE_SOCKET:
 493                 error = 0;
 494                 break;
 495
 496         default:
 497                 kprintf("fp->f_type = %d\n", fp->f_type);
 498         error = EBADF;
 499                 break;
 500         }
 501
 502         return (error);
 503 }
 504
 505 #define UIO_MX 16
 506
 507 static struct dirtmp {
 508         u_long d_fileno;
 509         u_short d_reclen;
 510         u_short d_namlen;
 511         char d_name[8];
 512 } rootent[] = {
 513         { FD_DEVFD, UIO_MX, 2, "fd" },
 514         { FD_STDIN, UIO_MX, 5, "stdin" },
 515         { FD_STDOUT, UIO_MX, 6, "stdout" },
 516         { FD_STDERR, UIO_MX, 6, "stderr" },
 517         { 0 }
 518 };
 519
 520 int
 521 fdesc_readdir(ap)
 522         struct vop_readdir_args /* {
 523                 struct vnode *a_vp;
 524                 struct uio *a_uio;
 525                 struct ucred *a_cred;
 526                 int *a_eofflag;
 527                 u_long *a_cookies;
 528                 int a_ncookies;
 529         } */ *ap;
 530 {
 531         struct uio *uio = ap->a_uio;
 532         struct proc *p = uio->uio_procp;
 533         int i, error;
 534
 535         /*
 536          * We don't allow exporting fdesc mounts, and currently local
 537          * requests do not need cookies.
 538          */
 539         if (ap->a_ncookies)
 540                 return (EINVAL);
 541
 542         switch (VTOFDESC(ap->a_vp)->fd_type) {
 543         case Fdesc:
 544                 return (ENOTDIR);
 545
 546         default:
 547                 break;
 548         }
 549
 550         if (VTOFDESC(ap->a_vp)->fd_type == Froot) {
 551                 struct dirent d;
 552                 struct dirent *dp = &d;
 553                 struct dirtmp *dt;
 554                 int fd;
 555
 556                 i = uio->uio_offset / UIO_MX;
 557                 error = 0;
 558
 559                 while (uio->uio_resid > 0) {
 560                         dt = &rootent[i];
 561                         if (dt->d_fileno == 0) {
 562                                 /**eofflagp = 1;*/
 563                                 break;
 564                         }
 565                         i++;
 566
 567                         switch (dt->d_fileno) {
 568                         case FD_STDIN:
 569                         case FD_STDOUT:
 570                         case FD_STDERR:
 571                                 fd = dt->d_fileno - FD_STDIN;
 572                                 if (fd >= p->p_fd->fd_nfiles)
 573                                         continue;
 574                                 if (*fdfile(p, fd) == NULL &&
 575                                                 !(*fdflags(p, fd) &
 576                                                         UF_RESERVED))
 577                                         continue;
 578                                 break;
 579                         }
 580                         bzero((caddr_t) dp, UIO_MX);
 581                         dp->d_fileno = dt->d_fileno;
 582                         dp->d_namlen = dt->d_namlen;
 583                         dp->d_type = DT_UNKNOWN;
 584                         dp->d_reclen = dt->d_reclen;
 585                         bcopy(dt->d_name, dp->d_name, dp->d_namlen+1);
 586                         error = uiomove((caddr_t) dp, UIO_MX, uio);
 587                         if (error)
 588                                 break;
 589                 }
 590                 uio->uio_offset = i * UIO_MX;
 591                 return (error);
 592         }
 593
 594         i = uio->uio_offset / UIO_MX;
 595         error = 0;
 596         while (uio->uio_resid > 0) {
 597                 if (i >= p->p_fd->fd_nfiles)
 598                         break;
 599
 600                 if (*fdfile(p, i) != NULL && !(*fdflags(p, i) & UF_RESERVED)) {
 601                         struct dirent d;
 602                         struct dirent *dp = &d;
 603
 604                         bzero((caddr_t) dp, UIO_MX);
 605
 606                         dp->d_namlen = sprintf(dp->d_name, "%d", i);
 607                         dp->d_reclen = UIO_MX;
 608                         dp->d_type = DT_UNKNOWN;
 609                         dp->d_fileno = i + FD_STDIN;
 610                         /*
 611                          * And ship to userland
 612                          */
 613                         error = uiomove((caddr_t) dp, UIO_MX, uio);
 614                         if (error)
 615                                 break;
 616                 }
 617                 i++;
 618         }
 619
 620         uio->uio_offset = i * UIO_MX;
 621         return (error);
 622 }
 623
 624 int
 625 fdesc_readlink(ap)
 626         struct vop_readlink_args /* {
 627                 struct vnode *a_vp;
 628                 struct uio *a_uio;
 629                 struct ucred *a_cred;
 630         } */ *ap;
 631 {
 632         struct vnode *vp = ap->a_vp;
 633         int error;
 634
 635         if (vp->v_type != VLNK)
 636                 return (EPERM);
 637
 638         if (VTOFDESC(vp)->fd_type == Flink) {
 639                 char *ln = VTOFDESC(vp)->fd_link;
 640                 error = uiomove(ln, strlen(ln), ap->a_uio);
 641         } else {
 642                 error = EOPNOTSUPP;
 643         }
 644
 645         return (error);
 646 }
 647
 648 int
 649 fdesc_read(ap)
 650         struct vop_read_args /* {
 651                 struct vnode *a_vp;
 652                 struct uio *a_uio;
 653                 int  a_ioflag;
 654                 struct ucred *a_cred;
 655         } */ *ap;
 656 {
 657
 658         return (EOPNOTSUPP);
 659 }
 660
 661 int
 662 fdesc_write(ap)
 663         struct vop_write_args /* {
 664                 struct vnode *a_vp;
 665                 struct uio *a_uio;
 666                 int  a_ioflag;
 667                 struct ucred *a_cred;
 668         } */ *ap;
 669 {
 670         return (EOPNOTSUPP);
 671 }
 672
 673 int
 674 fdesc_ioctl(ap)
 675         struct vop_ioctl_args /* {
 676                 struct vnode *a_vp;
 677                 int  a_command;
 678                 caddr_t  a_data;
 679                 int  a_fflag;
 680                 struct ucred *a_cred;
 681                 struct proc *a_p;
 682         } */ *ap;
 683 {
 684         return (EOPNOTSUPP);
 685 }
 686
 687 int
 688 fdesc_select(ap)
 689         struct vop_select_args /* {
 690                 struct vnode *a_vp;
 691                 int  a_which;
 692                 int  a_fflags;
 693                 struct ucred *a_cred;
 694                 void *a_wql;
 695                 struct proc *a_p;
 696         } */ *ap;
 697 {
 698         return (EOPNOTSUPP);
 699 }
 700
 701 int
 702 fdesc_inactive(ap)
 703         struct vop_inactive_args /* {
 704                 struct vnode *a_vp;
 705                 struct proc *a_p;
 706         } */ *ap;
 707 {
 708         struct vnode *vp = ap->a_vp;
 709
 710         /*
 711          * Clear out the v_type field to avoid
 712          * nasty things happening in vgone().
 713          */
 714         VOP_UNLOCK(vp, 0, ap->a_p);
 715         vp->v_type = VNON;
 716         return (0);
 717 }
 718
 719 int
 720 fdesc_reclaim(ap)
 721         struct vop_reclaim_args /* {
 722                 struct vnode *a_vp;
 723         } */ *ap;
 724 {
 725         struct vnode *vp = ap->a_vp;
 726         struct fdescnode *fd = VTOFDESC(vp);
 727
 728         LIST_REMOVE(fd, fd_hash);
 729         FREE(vp->v_data, M_TEMP);
 730         vp->v_data = 0;
 731
 732         return (0);
 733 }
 734
 735 /*
 736  * Return POSIX pathconf information applicable to special devices.
 737  */
 738 fdesc_pathconf(ap)
 739         struct vop_pathconf_args /* {
 740                 struct vnode *a_vp;
 741                 int a_name;
 742                 int *a_retval;
 743         } */ *ap;
 744 {
 745
 746         switch (ap->a_name) {
 747         case _PC_LINK_MAX:
 748                 *ap->a_retval = LINK_MAX;
 749                 return (0);
 750         case _PC_MAX_CANON:
 751                 *ap->a_retval = MAX_CANON;
 752                 return (0);
 753         case _PC_MAX_INPUT:
 754                 *ap->a_retval = MAX_INPUT;
 755                 return (0);
 756         case _PC_PIPE_BUF:
 757                 *ap->a_retval = PIPE_BUF;
 758                 return (0);
 759         case _PC_CHOWN_RESTRICTED:
 760                 *ap->a_retval = 1;
 761                 return (0);
 762         case _PC_VDISABLE:
 763                 *ap->a_retval = _POSIX_VDISABLE;
 764                 return (0);
 765         default:
 766                 return (EINVAL);
 767         }
 768         /* NOTREACHED */
 769 }
 770
 771 /*
 772  * Print out the contents of a /dev/fd vnode.
 773  */
 774 /* ARGSUSED */
 775 int
 776 fdesc_print(ap)
 777         struct vop_print_args /* {
 778                 struct vnode *a_vp;
 779         } */ *ap;
 780 {
 781
 782         printf("tag VT_NON, fdesc vnode\n");
 783         return (0);
 784 }
 785
 786 /*void*/
 787 int
 788 fdesc_vfree(ap)
 789         struct vop_vfree_args /* {
 790                 struct vnode *a_pvp;
 791                 ino_t a_ino;
 792                 int a_mode;
 793         } */ *ap;
 794 {
 795
 796         return (0);
 797 }
 798
 799 /*
 800  * /dev/fd "should never get here" operation
 801  */
 802 int
 803 fdesc_badop()
 804 {
 805
 806         return (ENOTSUP);
 807         /* NOTREACHED */
 808 }
 809
 810 #define VOPFUNC int (*)(void *)
 811
 812 #define fdesc_create ((int (*) __P((struct  vop_create_args *)))eopnotsupp)
 813 #define fdesc_mknod ((int (*) __P((struct  vop_mknod_args *)))eopnotsupp)
 814 #define fdesc_close ((int (*) __P((struct  vop_close_args *)))nullop)
 815 #define fdesc_access ((int (*) __P((struct  vop_access_args *)))nullop)
 816 #define fdesc_mmap ((int (*) __P((struct  vop_mmap_args *)))eopnotsupp)
 817 #define fdesc_revoke vop_revoke
 818 #define fdesc_fsync ((int (*) __P((struct  vop_fsync_args *)))nullop)
 819 #define fdesc_seek ((int (*) __P((struct  vop_seek_args *)))nullop)
 820 #define fdesc_remove ((int (*) __P((struct  vop_remove_args *)))eopnotsupp)
 821 #define fdesc_link ((int (*) __P((struct  vop_link_args *)))eopnotsupp)
 822 #define fdesc_rename ((int (*) __P((struct  vop_rename_args *)))eopnotsupp)
 823 #define fdesc_mkdir ((int (*) __P((struct  vop_mkdir_args *)))eopnotsupp)
 824 #define fdesc_rmdir ((int (*) __P((struct  vop_rmdir_args *)))eopnotsupp)
 825 #define fdesc_symlink ((int (*) __P((struct vop_symlink_args *)))eopnotsupp)
 826 #define fdesc_abortop ((int (*) __P((struct  vop_abortop_args *)))nullop)
 827 #define fdesc_lock ((int (*) __P((struct  vop_lock_args *)))vop_nolock)
 828 #define fdesc_unlock ((int (*) __P((struct  vop_unlock_args *)))vop_nounlock)
 829 #define fdesc_bmap ((int (*) __P((struct  vop_bmap_args *)))fdesc_badop)
 830 #define fdesc_strategy ((int (*) __P((struct  vop_strategy_args *)))fdesc_badop)
 831 #define fdesc_islocked \
 832         ((int (*) __P((struct vop_islocked_args *)))vop_noislocked)
 833 #define fdesc_advlock ((int (*) __P((struct vop_advlock_args *)))eopnotsupp)
 834 #define fdesc_blkatoff \
 835         ((int (*) __P((struct  vop_blkatoff_args *)))eopnotsupp)
 836 #define fdesc_valloc ((int(*) __P(( \
 837                 struct vnode *pvp, \
 838                 int mode, \
 839                 struct ucred *cred, \
 840                 struct vnode **vpp))) eopnotsupp)
 841 #define fdesc_truncate \
 842         ((int (*) __P((struct  vop_truncate_args *)))eopnotsupp)
 843 #define fdesc_update ((int (*) __P((struct  vop_update_args *)))eopnotsupp)
 844 #define fdesc_bwrite ((int (*) __P((struct  vop_bwrite_args *)))eopnotsupp)
 845 #define fdesc_blktooff ((int (*) __P((struct  vop_blktooff_args *)))eopnotsupp)
 846 #define fdesc_offtoblk ((int (*) __P((struct  vop_offtoblk_args *)))eopnotsupp)
 847 #define fdesc_cmap ((int (*) __P((struct  vop_cmap_args *)))eopnotsupp)
 848
 849 int (**fdesc_vnodeop_p)(void *);
 850 struct vnodeopv_entry_desc fdesc_vnodeop_entries[] = {
 851         { &vop_default_desc, (VOPFUNC)vn_default_error },
 852         { &vop_lookup_desc, (VOPFUNC)fdesc_lookup },    /* lookup */
 853         { &vop_create_desc, (VOPFUNC)fdesc_create },    /* create */
 854         { &vop_mknod_desc, (VOPFUNC)fdesc_mknod },      /* mknod */
 855         { &vop_open_desc, (VOPFUNC)fdesc_open },        /* open */
 856         { &vop_close_desc, (VOPFUNC)fdesc_close },      /* close */
 857         { &vop_access_desc, (VOPFUNC)fdesc_access },    /* access */
 858         { &vop_getattr_desc, (VOPFUNC)fdesc_getattr },  /* getattr */
 859         { &vop_setattr_desc, (VOPFUNC)fdesc_setattr },  /* setattr */
 860         { &vop_read_desc, (VOPFUNC)fdesc_read },        /* read */
 861         { &vop_write_desc, (VOPFUNC)fdesc_write },      /* write */
 862         { &vop_ioctl_desc, (VOPFUNC)fdesc_ioctl },      /* ioctl */
 863         { &vop_select_desc, (VOPFUNC)fdesc_select },    /* select */
 864         { &vop_revoke_desc, (VOPFUNC)fdesc_revoke },    /* revoke */
 865         { &vop_mmap_desc, (VOPFUNC)fdesc_mmap },        /* mmap */
 866         { &vop_fsync_desc, (VOPFUNC)fdesc_fsync },      /* fsync */
 867         { &vop_seek_desc, (VOPFUNC)fdesc_seek },        /* seek */
 868         { &vop_remove_desc, (VOPFUNC)fdesc_remove },    /* remove */
 869         { &vop_link_desc, (VOPFUNC)fdesc_link },        /* link */
 870         { &vop_rename_desc, (VOPFUNC)fdesc_rename },    /* rename */
 871         { &vop_mkdir_desc, (VOPFUNC)fdesc_mkdir },      /* mkdir */
 872         { &vop_rmdir_desc, (VOPFUNC)fdesc_rmdir },      /* rmdir */
 873         { &vop_symlink_desc, (VOPFUNC)fdesc_symlink },  /* symlink */
 874         { &vop_readdir_desc, (VOPFUNC)fdesc_readdir },  /* readdir */
 875         { &vop_readlink_desc, (VOPFUNC)fdesc_readlink },/* readlink */
 876         { &vop_abortop_desc, (VOPFUNC)fdesc_abortop },  /* abortop */
 877         { &vop_inactive_desc, (VOPFUNC)fdesc_inactive },/* inactive */
 878         { &vop_reclaim_desc, (VOPFUNC)fdesc_reclaim },  /* reclaim */
 879         { &vop_lock_desc, (VOPFUNC)fdesc_lock },        /* lock */
 880         { &vop_unlock_desc, (VOPFUNC)fdesc_unlock },    /* unlock */
 881         { &vop_bmap_desc, (VOPFUNC)fdesc_bmap },        /* bmap */
 882         { &vop_strategy_desc, (VOPFUNC)fdesc_strategy },        /* strategy */
 883         { &vop_print_desc, (VOPFUNC)fdesc_print },      /* print */
 884         { &vop_islocked_desc, (VOPFUNC)fdesc_islocked },        /* islocked */
 885         { &vop_pathconf_desc, (VOPFUNC)fdesc_pathconf },        /* pathconf */
 886         { &vop_advlock_desc, (VOPFUNC)fdesc_advlock },  /* advlock */
 887         { &vop_blkatoff_desc, (VOPFUNC)fdesc_blkatoff },        /* blkatoff */
 888         { &vop_valloc_desc, (VOPFUNC)fdesc_valloc },    /* valloc */
 889         { &vop_vfree_desc, (VOPFUNC)fdesc_vfree },      /* vfree */
 890         { &vop_truncate_desc, (VOPFUNC)fdesc_truncate },        /* truncate */
 891         { &vop_update_desc, (VOPFUNC)fdesc_update },    /* update */
 892         { &vop_bwrite_desc, (VOPFUNC)fdesc_bwrite },    /* bwrite */
 893         { &vop_pagein_desc, (VOPFUNC)err_pagein },      /* pagein */
 894         { &vop_pageout_desc, (VOPFUNC)err_pageout },    /* pageout */
 895         { &vop_copyfile_desc, (VOPFUNC)err_copyfile },  /* Copyfile */
 896         { &vop_blktooff_desc, (VOPFUNC)fdesc_blktooff },        /* blktooff */
 897         { &vop_blktooff_desc, (VOPFUNC)fdesc_offtoblk },        /* offtoblk */
 898         { &vop_cmap_desc, (VOPFUNC)fdesc_cmap },        /* cmap */
 899         { (struct vnodeop_desc*)NULL, (VOPFUNC)NULL }
 900 };
 901 struct vnodeopv_desc fdesc_vnodeop_opv_desc =
 902         { &fdesc_vnodeop_p, fdesc_vnodeop_entries };