1 /*
2 * Copyright (c) 2000-2019 Apple Inc. All rights reserved.
3 *
4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
5 *
6 * This file contains Original Code and/or Modifications of Original Code
7 * as defined in and that are subject to the Apple Public Source License
8 * Version 2.0 (the 'License'). You may not use this file except in
9 * compliance with the License. The rights granted to you under the License
10 * may not be used to create, or enable the creation or redistribution of,
11 * unlawful or unlicensed copies of an Apple operating system, or to
12 * circumvent, violate, or enable the circumvention or violation of, any
13 * terms of an Apple operating system software license agreement.
14 *
15 * Please obtain a copy of the License at
16 * http://www.opensource.apple.com/apsl/ and read it before using this file.
17 *
18 * The Original Code and all software distributed under the License are
19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
23 * Please see the License for the specific language governing rights and
24 * limitations under the License.
25 *
26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
27 */
28 /* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
29 /*
30 * Copyright (c) 1992, 1993
31 * The Regents of the University of California. All rights reserved.
32 *
33 * This code is derived from software donated to Berkeley by
34 * Jan-Simon Pendry.
35 *
36 * Redistribution and use in source and binary forms, with or without
37 * modification, are permitted provided that the following conditions
38 * are met:
39 * 1. Redistributions of source code must retain the above copyright
40 * notice, this list of conditions and the following disclaimer.
41 * 2. Redistributions in binary form must reproduce the above copyright
42 * notice, this list of conditions and the following disclaimer in the
43 * documentation and/or other materials provided with the distribution.
44 * 3. All advertising materials mentioning features or use of this software
45 * must display the following acknowledgement:
46 * This product includes software developed by the University of
47 * California, Berkeley and its contributors.
48 * 4. Neither the name of the University nor the names of its contributors
49 * may be used to endorse or promote products derived from this software
50 * without specific prior written permission.
51 *
52 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
53 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
54 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
55 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
56 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
57 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
58 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
59 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
60 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
61 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
62 * SUCH DAMAGE.
63 *
64 * @(#)fdesc_vnops.c 8.17 (Berkeley) 5/22/95
65 *
66 */
67
68 /*
69 * /dev/fd Filesystem
70 */
71
72 #include <sys/param.h>
73 #include <sys/systm.h>
74 #include <sys/types.h>
75 #include <sys/time.h>
76 #include <sys/proc_internal.h>
77 #include <sys/kernel.h> /* boottime */
78 #include <sys/resourcevar.h>
79 #include <sys/filedesc.h>
80 #include <sys/kauth.h>
81 #include <sys/vnode_internal.h>
82 #include <sys/malloc.h>
83 #include <sys/file_internal.h>
84 #include <sys/stat.h>
85 #include <sys/mount_internal.h>
86 #include <sys/namei.h>
87 #include <sys/dirent.h>
88 #include <sys/ubc.h>
89 #include <sys/socketvar.h>
90 #include <sys/pipe.h>
91 #include <sys/uio_internal.h>
92 #include <vfs/vfs_support.h>
93 #include <pexpert/pexpert.h>
94 #include <miscfs/devfs/fdesc.h>
95 #include <miscfs/devfs/devfs.h>
96 #include <miscfs/devfs/devfsdefs.h>
97
98 #define FDL_WANT 0x01
99 #define FDL_LOCKED 0x02
100 static int fdcache_lock;
101
102
103 #if (FD_STDIN != FD_STDOUT - 1) || (FD_STDOUT != FD_STDERR - 1)
104 FD_STDIN, FD_STDOUT, FD_STDERR must be a sequence n, n + 1, n + 2
105 #endif
106
107 #define NFDCACHE 3
108
109 #define FD_NHASH(ix) \
110 (&fdhashtbl[(ix) & fdhash])
111 LIST_HEAD(fdhashhead, fdescnode) * fdhashtbl;
112 u_long fdhash;
113
114 static int fdesc_attr(int fd, struct vnode_attr *vap, vfs_context_t a_context);
115
116 static LCK_GRP_DECLARE(fdesc_lckgrp, "fdesc");
117 static LCK_MTX_DECLARE(fdesc_mtx, &fdesc_lckgrp);
118
119 static void
fdesc_lock(void)120 fdesc_lock(void)
121 {
122 lck_mtx_lock(&fdesc_mtx);
123 }
124
125 static void
fdesc_unlock(void)126 fdesc_unlock(void)
127 {
128 lck_mtx_unlock(&fdesc_mtx);
129 }
130
131
132 /*
133 * Initialise cache headers, create the devfs node
134 */
135 int
devfs_fdesc_init()136 devfs_fdesc_init()
137 {
138 int error = 0;
139 devnode_t *rootdir = dev_root->de_dnp;
140 devdirent_t *direntp;
141
142 /* XXX Make sure you have the right path... */
143 fdhashtbl = hashinit(NFDCACHE, M_CACHE, &fdhash);
144
145 DEVFS_LOCK();
146 dev_add_entry("fd", rootdir, DEV_DEVFD, NULL, NULL, NULL, &direntp);
147 devfs_fdesc_makelinks();
148 DEVFS_UNLOCK();
149
150 return error;
151 }
152
153 /*
154 * Called during early startup, no need to synchronize
155 */
156 int
devfs_fdesc_makelinks()157 devfs_fdesc_makelinks()
158 {
159 int error = 0;
160 devdirent_t *stdin_ent = NULL, *stdout_ent = NULL, *stderr_ent = NULL;
161 devnode_t *root_devnode = dev_root->de_dnp;
162
163 /* We do this ugliness to get around some "const" warnings */
164 char in[] = "stdin";
165 char out[] = "stdout";
166 char err[] = "stderr";
167 char zero[] = "fd/0";
168 char one[] = "fd/1";
169 char two[] = "fd/2";
170
171 if ((error = devfs_make_symlink(root_devnode, in, 0555, zero, &stdin_ent))) {
172 printf("Couldn't make stdin, err %d.\n", error);
173 goto bad;
174 }
175
176 if ((error = devfs_make_symlink(root_devnode, out, 0555, one, &stdout_ent))) {
177 printf("Couldn't make stdout, err %d.\n", error);
178 goto bad;
179 }
180
181 if ((error = devfs_make_symlink(root_devnode, err, 0555, two, &stderr_ent))) {
182 printf("Couldn't make stderr, err %d.\n", error);
183 goto bad;
184 }
185
186 return 0;
187
188 bad:
189 if (stdin_ent) {
190 dev_free_name(stdin_ent);
191 }
192 if (stdout_ent) {
193 dev_free_name(stdout_ent);
194 }
195 if (stderr_ent) {
196 dev_free_name(stderr_ent);
197 }
198
199 return error;
200 }
201
202 int
fdesc_allocvp(fdntype ftype,int ix,struct mount * mp,struct vnode ** vpp,enum vtype vtype,int fdno)203 fdesc_allocvp(fdntype ftype, int ix, struct mount *mp, struct vnode **vpp, enum vtype vtype, int fdno)
204 {
205 struct fdhashhead *fc;
206 struct fdescnode *fd;
207 int error = 0;
208 int vid = 0;
209 struct vnode_fsparam vfsp;
210
211 fdesc_lock();
212
213 fc = FD_NHASH(ix);
214 loop:
215 for (fd = fc->lh_first; fd != 0; fd = fd->fd_hash.le_next) {
216 if (fd->fd_ix == ix && vnode_mount(fd->fd_vnode) == mp) {
217 vid = vnode_vid(fd->fd_vnode);
218 fdesc_unlock();
219
220 if (vnode_getwithvid(fd->fd_vnode, vid)) {
221 fdesc_lock();
222 goto loop;
223 }
224
225 *vpp = fd->fd_vnode;
226 (*vpp)->v_type = (uint16_t)vtype;
227
228 return error;
229 }
230 }
231
232 /* Only one thread can add to the hash at a time */
233 if (fdcache_lock & FDL_LOCKED) {
234 fdcache_lock |= FDL_WANT;
235 msleep((caddr_t) &fdcache_lock, &fdesc_mtx, PINOD, "fdesc_allocvp", NULL);
236 goto loop;
237 }
238
239 fdcache_lock |= FDL_LOCKED;
240 fdesc_unlock();
241
242 fd = kalloc_type(struct fdescnode, Z_WAITOK);
243
244 vfsp.vnfs_mp = mp;
245 vfsp.vnfs_vtype = vtype;
246 vfsp.vnfs_str = "fdesc";
247 vfsp.vnfs_dvp = NULL;
248 vfsp.vnfs_fsnode = fd;
249 vfsp.vnfs_cnp = NULL;
250 vfsp.vnfs_vops = fdesc_vnodeop_p;
251 vfsp.vnfs_rdev = 0;
252 vfsp.vnfs_filesize = 0;
253 vfsp.vnfs_flags = VNFS_NOCACHE | VNFS_CANTCACHE;
254 vfsp.vnfs_marksystem = 0;
255 vfsp.vnfs_markroot = 0;
256
257 error = vnode_create(VNCREATE_FLAVOR, VCREATESIZE, &vfsp, vpp);
258 if (error) {
259 kfree_type(struct fdescnode, fd);
260 fdesc_lock();
261 goto out;
262 }
263
264 (*vpp)->v_tag = VT_FDESC;
265 fd->fd_vnode = *vpp;
266 fd->fd_type = ftype;
267 fd->fd_fd = fdno;
268 fd->fd_link = NULL;
269 fd->fd_ix = ix;
270
271 fdesc_lock();
272
273 LIST_INSERT_HEAD(fc, fd, fd_hash);
274 out:
275 /* Hold the lock when we get here */
276 fdcache_lock &= ~FDL_LOCKED;
277
278 if (fdcache_lock & FDL_WANT) {
279 fdcache_lock &= ~FDL_WANT;
280 wakeup((caddr_t) &fdcache_lock);
281 }
282
283 fdesc_unlock();
284
285 return error;
286 }
287
288 /*
289 * vp is the current namei directory
290 * ndp is the name to locate in that directory...
291 *
292 * This vnop should only be called on the special directory /dev/fd.
293 */
294 int
devfs_devfd_lookup(struct vnop_lookup_args * ap)295 devfs_devfd_lookup(struct vnop_lookup_args *ap)
296 {
297 struct vnode **vpp = ap->a_vpp;
298 struct vnode *dvp = ap->a_dvp;
299 struct componentname *cnp = ap->a_cnp;
300 char *pname = cnp->cn_nameptr;
301 struct proc *p = vfs_context_proc(ap->a_context);
302 int numfiles = p->p_fd.fd_nfiles;
303 int fd;
304 int error;
305 struct vnode *fvp;
306
307 if (cnp->cn_namelen == 1 && *pname == '.') {
308 *vpp = dvp;
309
310 if ((error = vnode_get(dvp))) {
311 goto bad;
312 }
313 return 0;
314 }
315
316 fd = 0;
317 while (*pname >= '0' && *pname <= '9') {
318 if (os_mul_and_add_overflow(fd, 10, *pname++ - '0', &fd)) {
319 break;
320 }
321 }
322
323 if (*pname != '\0') {
324 error = ENOENT;
325 goto bad;
326 }
327
328 if (fd < 0 || fd >= numfiles ||
329 *fdfile(p, fd) == NULL ||
330 (*fdflags(p, fd) & UF_RESERVED)) {
331 error = EBADF;
332 goto bad;
333 }
334
335 error = fdesc_allocvp(Fdesc, FD_DESC + fd, dvp->v_mount, &fvp, VNON, fd);
336 if (error) {
337 goto bad;
338 }
339 *vpp = fvp;
340 return 0;
341
342 bad:
343 *vpp = NULL;
344 return error;
345 }
346
347 int
fdesc_open(struct vnop_open_args * ap)348 fdesc_open(struct vnop_open_args *ap)
349 {
350 struct vnode *vp = ap->a_vp;
351 thread_t thr = vfs_context_thread(ap->a_context);
352 uthread_t uu;
353 int error = 0;
354
355 if (thr == NULL) {
356 return EINVAL;
357 }
358
359 uu = get_bsdthread_info(thr);
360
361 switch (VTOFDESC(vp)->fd_type) {
362 case Fdesc:
363 /*
364 * XXX Kludge: set uu->uu_dupfd to contain the value of the
365 * the file descriptor being sought for duplication. The error
366 * return ensures that the vnode for this device will be
367 * released by vn_open. Open will detect this special error and
368 * take the actions in dupfdopen. Other callers of vn_open or
369 * vnop_open will simply report the error.
370 */
371 uu->uu_dupfd = VTOFDESC(vp)->fd_fd; /* XXX */
372 error = ENODEV;
373 break;
374 default:
375 panic("Invalid type for fdesc node!");
376 break;
377 }
378
379 return error;
380 }
381
382 static int
fdesc_attr(int fd,struct vnode_attr * vap,vfs_context_t a_context)383 fdesc_attr(int fd, struct vnode_attr *vap, vfs_context_t a_context)
384 {
385 struct fileproc *fp;
386 struct proc *p = vfs_context_proc(a_context);
387 struct stat stb;
388 int error;
389
390 if ((error = fp_lookup(p, fd, &fp, 0))) {
391 return error;
392 }
393 switch (FILEGLOB_DTYPE(fp->fp_glob)) {
394 case DTYPE_VNODE:
395 if ((error = vnode_getwithref((struct vnode *)fp_get_data(fp))) != 0) {
396 break;
397 }
398 if ((error = vnode_authorize((struct vnode *)fp_get_data(fp),
399 NULL,
400 KAUTH_VNODE_READ_ATTRIBUTES | KAUTH_VNODE_READ_SECURITY,
401 a_context)) == 0) {
402 error = vnode_getattr((struct vnode *)fp_get_data(fp), vap, a_context);
403 }
404 if (error == 0 && vap->va_type == VDIR) {
405 /*
406 * directories can cause loops in the namespace,
407 * so turn off the 'x' bits to avoid trouble.
408 *
409 * XXX ACLs break this, of course
410 */
411 vap->va_mode &= ~((VEXEC) | (VEXEC >> 3) | (VEXEC >> 6));
412 }
413 (void)vnode_put((struct vnode *)fp_get_data(fp));
414 break;
415
416 case DTYPE_SOCKET:
417 case DTYPE_PIPE:
418 #if SOCKETS
419 if (FILEGLOB_DTYPE(fp->fp_glob) == DTYPE_SOCKET) {
420 error = soo_stat((struct socket *)fp_get_data(fp), (void *)&stb, 0);
421 } else
422 #endif /* SOCKETS */
423 error = pipe_stat((struct pipe *)fp_get_data(fp), (void *)&stb, 0);
424
425 if (error == 0) {
426 if (FILEGLOB_DTYPE(fp->fp_glob) == DTYPE_SOCKET) {
427 VATTR_RETURN(vap, va_type, VSOCK);
428 } else {
429 VATTR_RETURN(vap, va_type, VFIFO);
430 }
431
432 VATTR_RETURN(vap, va_mode, stb.st_mode);
433 VATTR_RETURN(vap, va_nlink, stb.st_nlink);
434 VATTR_RETURN(vap, va_uid, stb.st_uid);
435 VATTR_RETURN(vap, va_gid, stb.st_gid);
436 VATTR_RETURN(vap, va_fsid, stb.st_dev);
437 VATTR_RETURN(vap, va_fileid, stb.st_ino);
438 VATTR_RETURN(vap, va_data_size, stb.st_size);
439 VATTR_RETURN(vap, va_access_time, stb.st_atimespec);
440 VATTR_RETURN(vap, va_modify_time, stb.st_mtimespec);
441 VATTR_RETURN(vap, va_change_time, stb.st_ctimespec);
442 VATTR_RETURN(vap, va_gen, stb.st_gen);
443 VATTR_RETURN(vap, va_flags, stb.st_flags);
444 VATTR_RETURN(vap, va_rdev, stb.st_rdev);
445 VATTR_RETURN(vap, va_total_alloc, stb.st_blocks * stb.st_blksize);
446 VATTR_RETURN(vap, va_acl, NULL);
447 }
448 break;
449
450 default:
451 error = EBADF;
452 }
453
454 fp_drop(p, fd, fp, 0);
455 return error;
456 }
457
458 int
fdesc_getattr(struct vnop_getattr_args * ap)459 fdesc_getattr(struct vnop_getattr_args *ap)
460 {
461 struct vnode *vp = ap->a_vp;
462 struct vnode_attr *vap = ap->a_vap;
463 unsigned fd;
464 int error = 0;
465
466 switch (VTOFDESC(vp)->fd_type) {
467 case Fdesc:
468 fd = VTOFDESC(vp)->fd_fd;
469 error = fdesc_attr(fd, vap, ap->a_context);
470 break;
471
472 default:
473 panic("Invalid type for an fdesc node!");
474 break;
475 }
476
477 /*
478 * Yes, we do this without locking, but this value is always just
479 * a snapshot.
480 */
481 if (error == 0) {
482 vp->v_type = (uint16_t)vap->va_type;
483
484 /* We need an inactive to reset type to VNON */
485 vnode_setneedinactive(vp);
486 }
487
488 return error;
489 }
490
491 int
fdesc_setattr(struct vnop_setattr_args * ap)492 fdesc_setattr(struct vnop_setattr_args *ap)
493 {
494 struct fileproc *fp;
495 unsigned fd;
496 int error;
497 struct proc * p = vfs_context_proc(ap->a_context);
498
499 /*
500 * Can't mess with the root vnode
501 */
502 switch (VTOFDESC(ap->a_vp)->fd_type) {
503 case Fdesc:
504 break;
505 default:
506 panic("Invalid type for an fdesc node!");
507 return EACCES;
508 }
509
510 fd = VTOFDESC(ap->a_vp)->fd_fd;
511 if ((error = fp_lookup(vfs_context_proc(ap->a_context), fd, &fp, 0))) {
512 return error;
513 }
514
515 /*
516 * Can setattr the underlying vnode, but not sockets!
517 */
518 switch (FILEGLOB_DTYPE(fp->fp_glob)) {
519 case DTYPE_VNODE:
520 {
521 if ((error = vnode_getwithref((struct vnode *)fp_get_data(fp))) != 0) {
522 break;
523 }
524 error = vnode_setattr((struct vnode *)fp_get_data(fp), ap->a_vap, ap->a_context);
525 (void)vnode_put((struct vnode *)fp_get_data(fp));
526 break;
527 }
528
529 case DTYPE_SOCKET:
530 case DTYPE_PIPE:
531 error = 0;
532 break;
533
534 default:
535 error = EBADF;
536 break;
537 }
538
539 fp_drop(p, fd, fp, 0);
540 return error;
541 }
542
543 #define UIO_MX 16
544
545 /*
546 * static struct dirtmp {
547 * u_int32_t d_fileno;
548 * u_short d_reclen;
549 * u_short d_namlen;
550 * char d_name[8];
551 * } rootent[] = {
552 * { FD_DEVFD, UIO_MX, 2, "fd" },
553 * { FD_STDIN, UIO_MX, 5, "stdin" },
554 * { FD_STDOUT, UIO_MX, 6, "stdout" },
555 * { FD_STDERR, UIO_MX, 6, "stderr" },
556 * { 0, 0, 0, "" }
557 * };
558 */
559
560 /* Only called on /dev/fd */
561 int
devfs_devfd_readdir(struct vnop_readdir_args * ap)562 devfs_devfd_readdir(struct vnop_readdir_args *ap)
563 {
564 struct uio *uio = ap->a_uio;
565 struct proc *p = current_proc();
566 off_t i;
567 int error;
568
569 /*
570 * We don't allow exporting fdesc mounts, and currently local
571 * requests do not need cookies.
572 */
573 if (ap->a_flags & (VNODE_READDIR_EXTENDED | VNODE_READDIR_REQSEEKOFF)) {
574 return EINVAL;
575 }
576
577 /*
578 * There needs to be space for at least one entry.
579 */
580 if (uio_resid(uio) < UIO_MX) {
581 return EINVAL;
582 }
583
584 i = uio->uio_offset / UIO_MX;
585 error = 0;
586 while (uio_resid(uio) >= UIO_MX) {
587 if (i >= p->p_fd.fd_nfiles || i < 0) {
588 break;
589 }
590
591 if (*fdfile(p, i) != NULL && !(*fdflags(p, i) & UF_RESERVED)) {
592 struct dirent d;
593 struct dirent *dp = &d;
594
595 bzero((caddr_t) dp, UIO_MX);
596
597 dp->d_namlen = (__uint8_t)scnprintf(dp->d_name, sizeof(dp->d_name),
598 "%lld", i);
599 dp->d_reclen = UIO_MX;
600 dp->d_type = DT_UNKNOWN;
601 dp->d_fileno = (ino_t)i + FD_STDIN;
602 /*
603 * And ship to userland
604 */
605 error = uiomove((caddr_t) dp, UIO_MX, uio);
606 if (error) {
607 break;
608 }
609 }
610 i++;
611 }
612
613 uio->uio_offset = i * UIO_MX;
614 return error;
615 }
616
617 int
fdesc_read(__unused struct vnop_read_args * ap)618 fdesc_read(__unused struct vnop_read_args *ap)
619 {
620 return ENOTSUP;
621 }
622
623 int
fdesc_write(__unused struct vnop_write_args * ap)624 fdesc_write(__unused struct vnop_write_args *ap)
625 {
626 return ENOTSUP;
627 }
628
629 int
fdesc_ioctl(__unused struct vnop_ioctl_args * ap)630 fdesc_ioctl(__unused struct vnop_ioctl_args *ap)
631 {
632 return ENOTSUP;
633 }
634
635 int
fdesc_select(__unused struct vnop_select_args * ap)636 fdesc_select(__unused struct vnop_select_args *ap)
637 {
638 return ENOTSUP;
639 }
640
641 int
fdesc_inactive(struct vnop_inactive_args * ap)642 fdesc_inactive(struct vnop_inactive_args *ap)
643 {
644 struct vnode *vp = ap->a_vp;
645
646 /*
647 * Clear out the v_type field to avoid
648 * nasty things happening in vgone().
649 */
650 vp->v_type = VNON;
651
652 return 0;
653 }
654
655 int
fdesc_reclaim(struct vnop_reclaim_args * ap)656 fdesc_reclaim(struct vnop_reclaim_args *ap)
657 {
658 struct vnode *vp = ap->a_vp;
659 struct fdescnode *fd = VTOFDESC(vp);
660
661 fdesc_lock();
662
663 LIST_REMOVE(fd, fd_hash);
664 kfree_type(struct fdescnode, vp->v_data);
665
666 fdesc_unlock();
667
668 return 0;
669 }
670
671 /*
672 * Return POSIX pathconf information applicable to special devices.
673 */
674 int
fdesc_pathconf(struct vnop_pathconf_args * ap)675 fdesc_pathconf(struct vnop_pathconf_args *ap)
676 {
677 switch (ap->a_name) {
678 case _PC_LINK_MAX:
679 *ap->a_retval = LINK_MAX;
680 return 0;
681 case _PC_MAX_CANON:
682 *ap->a_retval = MAX_CANON;
683 return 0;
684 case _PC_MAX_INPUT:
685 *ap->a_retval = MAX_INPUT;
686 return 0;
687 case _PC_PIPE_BUF:
688 *ap->a_retval = PIPE_BUF;
689 return 0;
690 case _PC_CHOWN_RESTRICTED:
691 *ap->a_retval = 200112; /* _POSIX_CHOWN_RESTRICTED */
692 return 0;
693 case _PC_VDISABLE:
694 *ap->a_retval = _POSIX_VDISABLE;
695 return 0;
696 default:
697 return EINVAL;
698 }
699 /* NOTREACHED */
700 }
701
702 /*
703 * /dev/fd "should never get here" operation
704 */
705 int
fdesc_badop(void)706 fdesc_badop(void)
707 {
708 return ENOTSUP;
709 /* NOTREACHED */
710 }
711
712 #define VOPFUNC int (*)(void *)
713
714 #define fdesc_create (int (*) (struct vnop_create_args *))eopnotsupp
715 #define fdesc_mknod (int (*) (struct vnop_mknod_args *))eopnotsupp
716 #define fdesc_close (int (*) (struct vnop_close_args *))nullop
717 #define fdesc_access (int (*) (struct vnop_access_args *))nullop
718 #define fdesc_mmap (int (*) (struct vnop_mmap_args *))eopnotsupp
719 #define fdesc_revoke nop_revoke
720 #define fdesc_fsync (int (*) (struct vnop_fsync_args *))nullop
721 #define fdesc_remove (int (*) (struct vnop_remove_args *))eopnotsupp
722 #define fdesc_link (int (*) (struct vnop_link_args *))eopnotsupp
723 #define fdesc_rename (int (*) (struct vnop_rename_args *))eopnotsupp
724 #define fdesc_mkdir (int (*) (struct vnop_mkdir_args *))eopnotsupp
725 #define fdesc_rmdir (int (*) (struct vnop_rmdir_args *))eopnotsupp
726 #define fdesc_symlink (int (*) (struct vnop_symlink_args *))eopnotsupp
727 #define fdesc_strategy (int (*) (struct vnop_strategy_args *))fdesc_badop
728 #define fdesc_advlock (int (*) (struct vnop_advlock_args *))eopnotsupp
729 #define fdesc_bwrite (int (*) (struct vnop_bwrite_args *))eopnotsupp
730 #define fdesc_blktooff (int (*) (struct vnop_blktooff_args *))eopnotsupp
731 #define fdesc_offtoblk (int (*) (struct vnop_offtoblk_args *))eopnotsupp
732 #define fdesc_blockmap (int (*) (struct vnop_blockmap_args *))eopnotsupp
733
734 int(**fdesc_vnodeop_p)(void *);
735 const struct vnodeopv_entry_desc devfs_fdesc_vnodeop_entries[] = {
736 { .opve_op = &vnop_default_desc, .opve_impl = (VOPFUNC)vn_default_error },
737 { .opve_op = &vnop_lookup_desc, .opve_impl = (VOPFUNC)vn_default_error}, /* lookup */
738 { .opve_op = &vnop_create_desc, .opve_impl = (VOPFUNC)fdesc_create }, /* create */
739 { .opve_op = &vnop_mknod_desc, .opve_impl = (VOPFUNC)fdesc_mknod }, /* mknod */
740 { .opve_op = &vnop_open_desc, .opve_impl = (VOPFUNC)fdesc_open }, /* open */
741 { .opve_op = &vnop_close_desc, .opve_impl = (VOPFUNC)fdesc_close }, /* close */
742 { .opve_op = &vnop_access_desc, .opve_impl = (VOPFUNC)fdesc_access }, /* access */
743 { .opve_op = &vnop_getattr_desc, .opve_impl = (VOPFUNC)fdesc_getattr }, /* getattr */
744 { .opve_op = &vnop_setattr_desc, .opve_impl = (VOPFUNC)fdesc_setattr }, /* setattr */
745 { .opve_op = &vnop_read_desc, .opve_impl = (VOPFUNC)fdesc_read }, /* read */
746 { .opve_op = &vnop_write_desc, .opve_impl = (VOPFUNC)fdesc_write }, /* write */
747 { .opve_op = &vnop_ioctl_desc, .opve_impl = (VOPFUNC)fdesc_ioctl }, /* ioctl */
748 { .opve_op = &vnop_select_desc, .opve_impl = (VOPFUNC)fdesc_select }, /* select */
749 { .opve_op = &vnop_revoke_desc, .opve_impl = (VOPFUNC)fdesc_revoke }, /* revoke */
750 { .opve_op = &vnop_mmap_desc, .opve_impl = (VOPFUNC)fdesc_mmap }, /* mmap */
751 { .opve_op = &vnop_fsync_desc, .opve_impl = (VOPFUNC)fdesc_fsync }, /* fsync */
752 { .opve_op = &vnop_remove_desc, .opve_impl = (VOPFUNC)fdesc_remove }, /* remove */
753 { .opve_op = &vnop_link_desc, .opve_impl = (VOPFUNC)fdesc_link }, /* link */
754 { .opve_op = &vnop_rename_desc, .opve_impl = (VOPFUNC)fdesc_rename }, /* rename */
755 { .opve_op = &vnop_mkdir_desc, .opve_impl = (VOPFUNC)fdesc_mkdir }, /* mkdir */
756 { .opve_op = &vnop_rmdir_desc, .opve_impl = (VOPFUNC)fdesc_rmdir }, /* rmdir */
757 { .opve_op = &vnop_symlink_desc, .opve_impl = (VOPFUNC)fdesc_symlink }, /* symlink */
758 { .opve_op = &vnop_readdir_desc, .opve_impl = (VOPFUNC)vn_default_error},/* readdir */
759 { .opve_op = &vnop_readlink_desc, .opve_impl = (VOPFUNC)err_readlink}, /* readlink */
760 { .opve_op = &vnop_inactive_desc, .opve_impl = (VOPFUNC)fdesc_inactive },/* inactive */
761 { .opve_op = &vnop_reclaim_desc, .opve_impl = (VOPFUNC)fdesc_reclaim }, /* reclaim */
762 { .opve_op = &vnop_strategy_desc, .opve_impl = (VOPFUNC)fdesc_strategy }, /* strategy */
763 { .opve_op = &vnop_pathconf_desc, .opve_impl = (VOPFUNC)fdesc_pathconf }, /* pathconf */
764 { .opve_op = &vnop_advlock_desc, .opve_impl = (VOPFUNC)fdesc_advlock }, /* advlock */
765 { .opve_op = &vnop_bwrite_desc, .opve_impl = (VOPFUNC)fdesc_bwrite }, /* bwrite */
766 { .opve_op = &vnop_pagein_desc, .opve_impl = (VOPFUNC)err_pagein }, /* pagein */
767 { .opve_op = &vnop_pageout_desc, .opve_impl = (VOPFUNC)err_pageout }, /* pageout */
768 { .opve_op = &vnop_copyfile_desc, .opve_impl = (VOPFUNC)err_copyfile }, /* Copyfile */
769 { .opve_op = &vnop_blktooff_desc, .opve_impl = (VOPFUNC)fdesc_blktooff }, /* blktooff */
770 { .opve_op = &vnop_blktooff_desc, .opve_impl = (VOPFUNC)fdesc_offtoblk }, /* offtoblk */
771 { .opve_op = &vnop_blockmap_desc, .opve_impl = (VOPFUNC)fdesc_blockmap }, /* blockmap */
772 { .opve_op = (struct vnodeop_desc*)NULL, .opve_impl = (VOPFUNC)NULL }
773 };
774
775 const struct vnodeopv_desc devfs_fdesc_vnodeop_opv_desc =
776 { .opv_desc_vector_p = &fdesc_vnodeop_p, .opv_desc_ops = devfs_fdesc_vnodeop_entries };
777