1 /*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 1989, 1993
5 * The Regents of the University of California. All rights reserved.
6 *
7 * This code is derived from software contributed
8 * to Berkeley by John Heidemann of the UCLA Ficus project.
9 *
10 * Source: * @(#)i405_init.c 2.10 92/04/27 UCLA Ficus project
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in the
19 * documentation and/or other materials provided with the distribution.
20 * 3. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 */
36
37 #include <sys/cdefs.h>
38 #include <sys/param.h>
39 #include <sys/systm.h>
40 #include <sys/bio.h>
41 #include <sys/buf.h>
42 #include <sys/conf.h>
43 #include <sys/event.h>
44 #include <sys/filio.h>
45 #include <sys/kernel.h>
46 #include <sys/limits.h>
47 #include <sys/lock.h>
48 #include <sys/lockf.h>
49 #include <sys/malloc.h>
50 #include <sys/mount.h>
51 #include <sys/namei.h>
52 #include <sys/rwlock.h>
53 #include <sys/fcntl.h>
54 #include <sys/unistd.h>
55 #include <sys/vnode.h>
56 #include <sys/dirent.h>
57 #include <sys/poll.h>
58 #include <sys/stat.h>
59 #include <security/audit/audit.h>
60 #include <sys/priv.h>
61
62 #include <security/mac/mac_framework.h>
63
64 #include <vm/vm.h>
65 #include <vm/vm_object.h>
66 #include <vm/vm_extern.h>
67 #include <vm/pmap.h>
68 #include <vm/vm_map.h>
69 #include <vm/vm_page.h>
70 #include <vm/vm_pager.h>
71 #include <vm/vnode_pager.h>
72
73 static int vop_nolookup(struct vop_lookup_args *);
74 static int vop_norename(struct vop_rename_args *);
75 static int vop_nostrategy(struct vop_strategy_args *);
76 static int dirent_exists(struct vnode *vp, const char *dirname,
77 struct thread *td);
78
79 static int vop_stdis_text(struct vop_is_text_args *ap);
80 static int vop_stdunset_text(struct vop_unset_text_args *ap);
81 static int vop_stdadd_writecount(struct vop_add_writecount_args *ap);
82 static int vop_stdcopy_file_range(struct vop_copy_file_range_args *ap);
83 static int vop_stdfdatasync(struct vop_fdatasync_args *ap);
84 static int vop_stdgetpages_async(struct vop_getpages_async_args *ap);
85 static int vop_stdread_pgcache(struct vop_read_pgcache_args *ap);
86 static int vop_stdstat(struct vop_stat_args *ap);
87 static int vop_stdvput_pair(struct vop_vput_pair_args *ap);
88 static int vop_stdgetlowvnode(struct vop_getlowvnode_args *ap);
89
90 /*
91 * This vnode table stores what we want to do if the filesystem doesn't
92 * implement a particular VOP.
93 *
94 * If there is no specific entry here, we will return EOPNOTSUPP.
95 *
96 * Note that every filesystem has to implement either vop_access
97 * or vop_accessx; failing to do so will result in immediate crash
98 * due to stack overflow, as vop_stdaccess() calls vop_stdaccessx(),
99 * which calls vop_stdaccess() etc.
100 */
101
102 struct vop_vector default_vnodeops = {
103 .vop_default = NULL,
104 .vop_bypass = VOP_EOPNOTSUPP,
105
106 .vop_access = vop_stdaccess,
107 .vop_accessx = vop_stdaccessx,
108 .vop_advise = vop_stdadvise,
109 .vop_advlock = vop_stdadvlock,
110 .vop_advlockasync = vop_stdadvlockasync,
111 .vop_advlockpurge = vop_stdadvlockpurge,
112 .vop_allocate = vop_stdallocate,
113 .vop_bmap = vop_stdbmap,
114 .vop_close = VOP_NULL,
115 .vop_fsync = VOP_NULL,
116 .vop_stat = vop_stdstat,
117 .vop_fdatasync = vop_stdfdatasync,
118 .vop_getlowvnode = vop_stdgetlowvnode,
119 .vop_getpages = vop_stdgetpages,
120 .vop_getpages_async = vop_stdgetpages_async,
121 .vop_getwritemount = vop_stdgetwritemount,
122 .vop_inactive = VOP_NULL,
123 .vop_need_inactive = vop_stdneed_inactive,
124 .vop_ioctl = vop_stdioctl,
125 .vop_kqfilter = vop_stdkqfilter,
126 .vop_islocked = vop_stdislocked,
127 .vop_lock1 = vop_stdlock,
128 .vop_lookup = vop_nolookup,
129 .vop_open = VOP_NULL,
130 .vop_pathconf = VOP_EINVAL,
131 .vop_poll = vop_nopoll,
132 .vop_putpages = vop_stdputpages,
133 .vop_readlink = VOP_EINVAL,
134 .vop_read_pgcache = vop_stdread_pgcache,
135 .vop_rename = vop_norename,
136 .vop_revoke = VOP_PANIC,
137 .vop_strategy = vop_nostrategy,
138 .vop_unlock = vop_stdunlock,
139 .vop_vptocnp = vop_stdvptocnp,
140 .vop_vptofh = vop_stdvptofh,
141 .vop_unp_bind = vop_stdunp_bind,
142 .vop_unp_connect = vop_stdunp_connect,
143 .vop_unp_detach = vop_stdunp_detach,
144 .vop_is_text = vop_stdis_text,
145 .vop_set_text = vop_stdset_text,
146 .vop_unset_text = vop_stdunset_text,
147 .vop_add_writecount = vop_stdadd_writecount,
148 .vop_copy_file_range = vop_stdcopy_file_range,
149 .vop_vput_pair = vop_stdvput_pair,
150 };
151 VFS_VOP_VECTOR_REGISTER(default_vnodeops);
152
153 /*
154 * Series of placeholder functions for various error returns for
155 * VOPs.
156 */
157
158 int
vop_eopnotsupp(struct vop_generic_args * ap)159 vop_eopnotsupp(struct vop_generic_args *ap)
160 {
161 /*
162 printf("vop_notsupp[%s]\n", ap->a_desc->vdesc_name);
163 */
164
165 return (EOPNOTSUPP);
166 }
167
168 int
vop_ebadf(struct vop_generic_args * ap)169 vop_ebadf(struct vop_generic_args *ap)
170 {
171
172 return (EBADF);
173 }
174
175 int
vop_enotty(struct vop_generic_args * ap)176 vop_enotty(struct vop_generic_args *ap)
177 {
178
179 return (ENOTTY);
180 }
181
182 int
vop_einval(struct vop_generic_args * ap)183 vop_einval(struct vop_generic_args *ap)
184 {
185
186 return (EINVAL);
187 }
188
189 int
vop_enoent(struct vop_generic_args * ap)190 vop_enoent(struct vop_generic_args *ap)
191 {
192
193 return (ENOENT);
194 }
195
196 int
vop_eagain(struct vop_generic_args * ap)197 vop_eagain(struct vop_generic_args *ap)
198 {
199
200 return (EAGAIN);
201 }
202
203 int
vop_null(struct vop_generic_args * ap)204 vop_null(struct vop_generic_args *ap)
205 {
206
207 return (0);
208 }
209
210 /*
211 * Helper function to panic on some bad VOPs in some filesystems.
212 */
213 int
vop_panic(struct vop_generic_args * ap)214 vop_panic(struct vop_generic_args *ap)
215 {
216
217 panic("filesystem goof: vop_panic[%s]", ap->a_desc->vdesc_name);
218 }
219
220 /*
221 * vop_std<something> and vop_no<something> are default functions for use by
222 * filesystems that need the "default reasonable" implementation for a
223 * particular operation.
224 *
225 * The documentation for the operations they implement exists (if it exists)
226 * in the VOP_<SOMETHING>(9) manpage (all uppercase).
227 */
228
229 /*
230 * Default vop for filesystems that do not support name lookup
231 */
232 static int
vop_nolookup(struct vop_lookup_args * ap)233 vop_nolookup(struct vop_lookup_args *ap)
234 {
235
236 *ap->a_vpp = NULL;
237 return (ENOTDIR);
238 }
239
240 /*
241 * vop_norename:
242 *
243 * Handle unlock and reference counting for arguments of vop_rename
244 * for filesystems that do not implement rename operation.
245 */
246 static int
vop_norename(struct vop_rename_args * ap)247 vop_norename(struct vop_rename_args *ap)
248 {
249
250 vop_rename_fail(ap);
251 return (EOPNOTSUPP);
252 }
253
254 /*
255 * vop_nostrategy:
256 *
257 * Strategy routine for VFS devices that have none.
258 *
259 * BIO_ERROR and B_INVAL must be cleared prior to calling any strategy
260 * routine. Typically this is done for a BIO_READ strategy call.
261 * Typically B_INVAL is assumed to already be clear prior to a write
262 * and should not be cleared manually unless you just made the buffer
263 * invalid. BIO_ERROR should be cleared either way.
264 */
265
266 static int
vop_nostrategy(struct vop_strategy_args * ap)267 vop_nostrategy (struct vop_strategy_args *ap)
268 {
269 printf("No strategy for buffer at %p\n", ap->a_bp);
270 vn_printf(ap->a_vp, "vnode ");
271 ap->a_bp->b_ioflags |= BIO_ERROR;
272 ap->a_bp->b_error = EOPNOTSUPP;
273 bufdone(ap->a_bp);
274 return (EOPNOTSUPP);
275 }
276
277 /*
278 * Check if a named file exists in a given directory vnode
279 *
280 * Returns 0 if the file exists, ENOENT if it doesn't, or errors returned by
281 * vn_dir_next_dirent().
282 */
283 static int
dirent_exists(struct vnode * vp,const char * dirname,struct thread * td)284 dirent_exists(struct vnode *vp, const char *dirname, struct thread *td)
285 {
286 char *dirbuf;
287 int error, eofflag;
288 size_t dirbuflen, len;
289 off_t off;
290 struct dirent *dp;
291 struct vattr va;
292
293 ASSERT_VOP_LOCKED(vp, "vnode not locked");
294 KASSERT(vp->v_type == VDIR, ("vp %p is not a directory", vp));
295
296 error = VOP_GETATTR(vp, &va, td->td_ucred);
297 if (error != 0)
298 return (error);
299
300 dirbuflen = MAX(DEV_BSIZE, GENERIC_MAXDIRSIZ);
301 if (dirbuflen < va.va_blocksize)
302 dirbuflen = va.va_blocksize;
303 dirbuf = malloc(dirbuflen, M_TEMP, M_WAITOK);
304
305 len = 0;
306 off = 0;
307 eofflag = 0;
308
309 for (;;) {
310 error = vn_dir_next_dirent(vp, td, dirbuf, dirbuflen,
311 &dp, &len, &off, &eofflag);
312 if (error != 0)
313 goto out;
314
315 if (len == 0)
316 break;
317
318 if (dp->d_type != DT_WHT && dp->d_fileno != 0 &&
319 strcmp(dp->d_name, dirname) == 0)
320 goto out;
321 }
322
323 error = ENOENT;
324
325 out:
326 free(dirbuf, M_TEMP);
327 return (error);
328 }
329
330 int
vop_stdaccess(struct vop_access_args * ap)331 vop_stdaccess(struct vop_access_args *ap)
332 {
333
334 KASSERT((ap->a_accmode & ~(VEXEC | VWRITE | VREAD | VADMIN |
335 VAPPEND)) == 0, ("invalid bit in accmode"));
336
337 return (VOP_ACCESSX(ap->a_vp, ap->a_accmode, ap->a_cred, ap->a_td));
338 }
339
340 int
vop_stdaccessx(struct vop_accessx_args * ap)341 vop_stdaccessx(struct vop_accessx_args *ap)
342 {
343 int error;
344 accmode_t accmode = ap->a_accmode;
345
346 error = vfs_unixify_accmode(&accmode);
347 if (error != 0)
348 return (error);
349
350 if (accmode == 0)
351 return (0);
352
353 return (VOP_ACCESS(ap->a_vp, accmode, ap->a_cred, ap->a_td));
354 }
355
356 /*
357 * Advisory record locking support
358 */
359 int
vop_stdadvlock(struct vop_advlock_args * ap)360 vop_stdadvlock(struct vop_advlock_args *ap)
361 {
362 struct vnode *vp;
363 struct mount *mp;
364 struct vattr vattr;
365 int error;
366
367 vp = ap->a_vp;
368
369 /*
370 * Provide atomicity of open(O_CREAT | O_EXCL | O_EXLOCK) for
371 * local filesystems. See vn_open_cred() for reciprocal part.
372 */
373 mp = vp->v_mount;
374 if (mp != NULL && (mp->mnt_flag & MNT_LOCAL) != 0 &&
375 ap->a_op == F_SETLK && (ap->a_flags & F_FIRSTOPEN) == 0) {
376 VI_LOCK(vp);
377 while ((vp->v_iflag & VI_FOPENING) != 0)
378 msleep(vp, VI_MTX(vp), PLOCK, "lockfo", 0);
379 VI_UNLOCK(vp);
380 }
381
382 if (ap->a_fl->l_whence == SEEK_END) {
383 /*
384 * The NFSv4 server must avoid doing a vn_lock() here, since it
385 * can deadlock the nfsd threads, due to a LOR. Fortunately
386 * the NFSv4 server always uses SEEK_SET and this code is
387 * only required for the SEEK_END case.
388 */
389 vn_lock(vp, LK_SHARED | LK_RETRY);
390 error = VOP_GETATTR(vp, &vattr, curthread->td_ucred);
391 VOP_UNLOCK(vp);
392 if (error)
393 return (error);
394 } else
395 vattr.va_size = 0;
396
397 return (lf_advlock(ap, &(vp->v_lockf), vattr.va_size));
398 }
399
400 int
vop_stdadvlockasync(struct vop_advlockasync_args * ap)401 vop_stdadvlockasync(struct vop_advlockasync_args *ap)
402 {
403 struct vnode *vp;
404 struct vattr vattr;
405 int error;
406
407 vp = ap->a_vp;
408 if (ap->a_fl->l_whence == SEEK_END) {
409 /* The size argument is only needed for SEEK_END. */
410 vn_lock(vp, LK_SHARED | LK_RETRY);
411 error = VOP_GETATTR(vp, &vattr, curthread->td_ucred);
412 VOP_UNLOCK(vp);
413 if (error)
414 return (error);
415 } else
416 vattr.va_size = 0;
417
418 return (lf_advlockasync(ap, &(vp->v_lockf), vattr.va_size));
419 }
420
421 int
vop_stdadvlockpurge(struct vop_advlockpurge_args * ap)422 vop_stdadvlockpurge(struct vop_advlockpurge_args *ap)
423 {
424 struct vnode *vp;
425
426 vp = ap->a_vp;
427 lf_purgelocks(vp, &vp->v_lockf);
428 return (0);
429 }
430
431 /*
432 * vop_stdpathconf:
433 *
434 * Standard implementation of POSIX pathconf, to get information about limits
435 * for a filesystem.
436 * Override per filesystem for the case where the filesystem has smaller
437 * limits.
438 */
439 int
vop_stdpathconf(struct vop_pathconf_args * ap)440 vop_stdpathconf(struct vop_pathconf_args *ap)
441 {
442
443 switch (ap->a_name) {
444 case _PC_ASYNC_IO:
445 *ap->a_retval = _POSIX_ASYNCHRONOUS_IO;
446 return (0);
447 case _PC_PATH_MAX:
448 *ap->a_retval = PATH_MAX;
449 return (0);
450 case _PC_ACL_EXTENDED:
451 case _PC_ACL_NFS4:
452 case _PC_CAP_PRESENT:
453 case _PC_INF_PRESENT:
454 case _PC_MAC_PRESENT:
455 *ap->a_retval = 0;
456 return (0);
457 default:
458 return (EINVAL);
459 }
460 /* NOTREACHED */
461 }
462
463 /*
464 * Standard lock, unlock and islocked functions.
465 */
466 int
vop_stdlock(struct vop_lock1_args * ap)467 vop_stdlock(struct vop_lock1_args *ap)
468 {
469 struct vnode *vp = ap->a_vp;
470 struct mtx *ilk;
471
472 ilk = VI_MTX(vp);
473 return (lockmgr_lock_flags(vp->v_vnlock, ap->a_flags,
474 &ilk->lock_object, ap->a_file, ap->a_line));
475 }
476
477 /* See above. */
478 int
vop_stdunlock(struct vop_unlock_args * ap)479 vop_stdunlock(struct vop_unlock_args *ap)
480 {
481 struct vnode *vp = ap->a_vp;
482
483 return (lockmgr_unlock(vp->v_vnlock));
484 }
485
486 /* See above. */
487 int
vop_stdislocked(struct vop_islocked_args * ap)488 vop_stdislocked(struct vop_islocked_args *ap)
489 {
490
491 return (lockstatus(ap->a_vp->v_vnlock));
492 }
493
494 /*
495 * Variants of the above set.
496 *
497 * Differences are:
498 * - shared locking disablement is not supported
499 * - v_vnlock pointer is not honored
500 */
501 int
vop_lock(struct vop_lock1_args * ap)502 vop_lock(struct vop_lock1_args *ap)
503 {
504 struct vnode *vp = ap->a_vp;
505 int flags = ap->a_flags;
506 struct mtx *ilk;
507
508 MPASS(vp->v_vnlock == &vp->v_lock);
509
510 if (__predict_false((flags & ~(LK_TYPE_MASK | LK_NODDLKTREAT | LK_RETRY)) != 0))
511 goto other;
512
513 switch (flags & LK_TYPE_MASK) {
514 case LK_SHARED:
515 return (lockmgr_slock(&vp->v_lock, flags, ap->a_file, ap->a_line));
516 case LK_EXCLUSIVE:
517 return (lockmgr_xlock(&vp->v_lock, flags, ap->a_file, ap->a_line));
518 }
519 other:
520 ilk = VI_MTX(vp);
521 return (lockmgr_lock_flags(&vp->v_lock, flags,
522 &ilk->lock_object, ap->a_file, ap->a_line));
523 }
524
525 int
vop_unlock(struct vop_unlock_args * ap)526 vop_unlock(struct vop_unlock_args *ap)
527 {
528 struct vnode *vp = ap->a_vp;
529
530 MPASS(vp->v_vnlock == &vp->v_lock);
531
532 return (lockmgr_unlock(&vp->v_lock));
533 }
534
535 int
vop_islocked(struct vop_islocked_args * ap)536 vop_islocked(struct vop_islocked_args *ap)
537 {
538 struct vnode *vp = ap->a_vp;
539
540 MPASS(vp->v_vnlock == &vp->v_lock);
541
542 return (lockstatus(&vp->v_lock));
543 }
544
545 /*
546 * Return true for select/poll.
547 */
548 int
vop_nopoll(struct vop_poll_args * ap)549 vop_nopoll(struct vop_poll_args *ap)
550 {
551
552 if (ap->a_events & ~POLLSTANDARD)
553 return (POLLNVAL);
554 return (ap->a_events & (POLLIN | POLLOUT | POLLRDNORM | POLLWRNORM));
555 }
556
557 /*
558 * Implement poll for local filesystems that support it.
559 */
560 int
vop_stdpoll(struct vop_poll_args * ap)561 vop_stdpoll(struct vop_poll_args *ap)
562 {
563 if (ap->a_events & ~POLLSTANDARD)
564 return (vn_pollrecord(ap->a_vp, ap->a_td, ap->a_events));
565 return (ap->a_events & (POLLIN | POLLOUT | POLLRDNORM | POLLWRNORM));
566 }
567
568 /*
569 * Return our mount point, as we will take charge of the writes.
570 */
571 int
vop_stdgetwritemount(struct vop_getwritemount_args * ap)572 vop_stdgetwritemount(struct vop_getwritemount_args *ap)
573 {
574 struct mount *mp;
575 struct vnode *vp;
576
577 /*
578 * Note that having a reference does not prevent forced unmount from
579 * setting ->v_mount to NULL after the lock gets released. This is of
580 * no consequence for typical consumers (most notably vn_start_write)
581 * since in this case the vnode is VIRF_DOOMED. Unmount might have
582 * progressed far enough that its completion is only delayed by the
583 * reference obtained here. The consumer only needs to concern itself
584 * with releasing it.
585 */
586 vp = ap->a_vp;
587 mp = vfs_ref_from_vp(vp);
588 *(ap->a_mpp) = mp;
589 return (0);
590 }
591
592 /*
593 * If the file system doesn't implement VOP_BMAP, then return sensible defaults:
594 * - Return the vnode's bufobj instead of any underlying device's bufobj
595 * - Calculate the physical block number as if there were equal size
596 * consecutive blocks, but
597 * - Report no contiguous runs of blocks.
598 */
599 int
vop_stdbmap(struct vop_bmap_args * ap)600 vop_stdbmap(struct vop_bmap_args *ap)
601 {
602
603 if (ap->a_bop != NULL)
604 *ap->a_bop = &ap->a_vp->v_bufobj;
605 if (ap->a_bnp != NULL)
606 *ap->a_bnp = ap->a_bn * btodb(ap->a_vp->v_mount->mnt_stat.f_iosize);
607 if (ap->a_runp != NULL)
608 *ap->a_runp = 0;
609 if (ap->a_runb != NULL)
610 *ap->a_runb = 0;
611 return (0);
612 }
613
614 int
vop_stdfsync(struct vop_fsync_args * ap)615 vop_stdfsync(struct vop_fsync_args *ap)
616 {
617
618 return (vn_fsync_buf(ap->a_vp, ap->a_waitfor));
619 }
620
621 static int
vop_stdfdatasync(struct vop_fdatasync_args * ap)622 vop_stdfdatasync(struct vop_fdatasync_args *ap)
623 {
624
625 return (VOP_FSYNC(ap->a_vp, MNT_WAIT, ap->a_td));
626 }
627
628 int
vop_stdfdatasync_buf(struct vop_fdatasync_args * ap)629 vop_stdfdatasync_buf(struct vop_fdatasync_args *ap)
630 {
631
632 return (vn_fsync_buf(ap->a_vp, MNT_WAIT));
633 }
634
635 /* XXX Needs good comment and more info in the manpage (VOP_GETPAGES(9)). */
636 int
vop_stdgetpages(struct vop_getpages_args * ap)637 vop_stdgetpages(struct vop_getpages_args *ap)
638 {
639
640 return vnode_pager_generic_getpages(ap->a_vp, ap->a_m,
641 ap->a_count, ap->a_rbehind, ap->a_rahead, NULL, NULL);
642 }
643
644 static int
vop_stdgetpages_async(struct vop_getpages_async_args * ap)645 vop_stdgetpages_async(struct vop_getpages_async_args *ap)
646 {
647 int error;
648
649 error = VOP_GETPAGES(ap->a_vp, ap->a_m, ap->a_count, ap->a_rbehind,
650 ap->a_rahead);
651 if (ap->a_iodone != NULL)
652 ap->a_iodone(ap->a_arg, ap->a_m, ap->a_count, error);
653 return (error);
654 }
655
656 int
vop_stdkqfilter(struct vop_kqfilter_args * ap)657 vop_stdkqfilter(struct vop_kqfilter_args *ap)
658 {
659 return vfs_kqfilter(ap);
660 }
661
662 /* XXX Needs good comment and more info in the manpage (VOP_PUTPAGES(9)). */
663 int
vop_stdputpages(struct vop_putpages_args * ap)664 vop_stdputpages(struct vop_putpages_args *ap)
665 {
666
667 return vnode_pager_generic_putpages(ap->a_vp, ap->a_m, ap->a_count,
668 ap->a_sync, ap->a_rtvals);
669 }
670
671 int
vop_stdvptofh(struct vop_vptofh_args * ap)672 vop_stdvptofh(struct vop_vptofh_args *ap)
673 {
674 return (EOPNOTSUPP);
675 }
676
677 int
vop_stdvptocnp(struct vop_vptocnp_args * ap)678 vop_stdvptocnp(struct vop_vptocnp_args *ap)
679 {
680 struct vnode *const vp = ap->a_vp;
681 struct vnode **const dvp = ap->a_vpp;
682 char *buf = ap->a_buf;
683 size_t *buflen = ap->a_buflen;
684 char *dirbuf;
685 int i = *buflen;
686 int error = 0, covered = 0;
687 int eofflag, flags, locked;
688 size_t dirbuflen, len;
689 off_t off;
690 ino_t fileno;
691 struct vattr va;
692 struct nameidata nd;
693 struct thread *const td = curthread;
694 struct ucred *const cred = td->td_ucred;
695 struct dirent *dp;
696 struct vnode *mvp;
697
698 if (vp->v_type != VDIR)
699 return (ENOENT);
700
701 error = VOP_GETATTR(vp, &va, cred);
702 if (error)
703 return (error);
704
705 VREF(vp);
706 locked = VOP_ISLOCKED(vp);
707 VOP_UNLOCK(vp);
708 NDINIT_ATVP(&nd, LOOKUP, FOLLOW | LOCKSHARED | LOCKLEAF, UIO_SYSSPACE,
709 "..", vp, td);
710 flags = FREAD;
711 error = vn_open_cred(&nd, &flags, 0, VN_OPEN_NOAUDIT, cred, NULL);
712 if (error) {
713 vn_lock(vp, locked | LK_RETRY);
714 return (error);
715 }
716 NDFREE(&nd, NDF_ONLY_PNBUF);
717
718 mvp = *dvp = nd.ni_vp;
719
720 if (vp->v_mount != (*dvp)->v_mount &&
721 ((*dvp)->v_vflag & VV_ROOT) &&
722 ((*dvp)->v_mount->mnt_flag & MNT_UNION)) {
723 *dvp = (*dvp)->v_mount->mnt_vnodecovered;
724 VREF(mvp);
725 VOP_UNLOCK(mvp);
726 vn_close(mvp, FREAD, cred, td);
727 VREF(*dvp);
728 vn_lock(*dvp, LK_SHARED | LK_RETRY);
729 covered = 1;
730 }
731
732 fileno = va.va_fileid;
733
734 dirbuflen = MAX(DEV_BSIZE, GENERIC_MAXDIRSIZ);
735 if (dirbuflen < va.va_blocksize)
736 dirbuflen = va.va_blocksize;
737 dirbuf = malloc(dirbuflen, M_TEMP, M_WAITOK);
738
739 if ((*dvp)->v_type != VDIR) {
740 error = ENOENT;
741 goto out;
742 }
743
744 len = 0;
745 off = 0;
746 eofflag = 0;
747
748 for (;;) {
749 /* call VOP_READDIR of parent */
750 error = vn_dir_next_dirent(*dvp, td,
751 dirbuf, dirbuflen, &dp, &len, &off, &eofflag);
752 if (error != 0)
753 goto out;
754
755 if (len == 0) {
756 error = ENOENT;
757 goto out;
758 }
759
760 if ((dp->d_type != DT_WHT) &&
761 (dp->d_fileno == fileno)) {
762 if (covered) {
763 VOP_UNLOCK(*dvp);
764 vn_lock(mvp, LK_SHARED | LK_RETRY);
765 if (dirent_exists(mvp, dp->d_name, td) == 0) {
766 error = ENOENT;
767 VOP_UNLOCK(mvp);
768 vn_lock(*dvp, LK_SHARED | LK_RETRY);
769 goto out;
770 }
771 VOP_UNLOCK(mvp);
772 vn_lock(*dvp, LK_SHARED | LK_RETRY);
773 }
774 i -= dp->d_namlen;
775
776 if (i < 0) {
777 error = ENOMEM;
778 goto out;
779 }
780 if (dp->d_namlen == 1 && dp->d_name[0] == '.') {
781 error = ENOENT;
782 } else {
783 bcopy(dp->d_name, buf + i, dp->d_namlen);
784 error = 0;
785 }
786 goto out;
787 }
788 }
789
790 out:
791 free(dirbuf, M_TEMP);
792 if (!error) {
793 *buflen = i;
794 vref(*dvp);
795 }
796 if (covered) {
797 vput(*dvp);
798 vrele(mvp);
799 } else {
800 VOP_UNLOCK(mvp);
801 vn_close(mvp, FREAD, cred, td);
802 }
803 vn_lock(vp, locked | LK_RETRY);
804 return (error);
805 }
806
807 int
vop_stdallocate(struct vop_allocate_args * ap)808 vop_stdallocate(struct vop_allocate_args *ap)
809 {
810 #ifdef __notyet__
811 struct statfs *sfs;
812 off_t maxfilesize = 0;
813 #endif
814 struct iovec aiov;
815 struct vattr vattr, *vap;
816 struct uio auio;
817 off_t fsize, len, cur, offset;
818 uint8_t *buf;
819 struct thread *td;
820 struct vnode *vp;
821 size_t iosize;
822 int error;
823
824 buf = NULL;
825 error = 0;
826 td = curthread;
827 vap = &vattr;
828 vp = ap->a_vp;
829 len = *ap->a_len;
830 offset = *ap->a_offset;
831
832 error = VOP_GETATTR(vp, vap, ap->a_cred);
833 if (error != 0)
834 goto out;
835 fsize = vap->va_size;
836 iosize = vap->va_blocksize;
837 if (iosize == 0)
838 iosize = BLKDEV_IOSIZE;
839 if (iosize > maxphys)
840 iosize = maxphys;
841 buf = malloc(iosize, M_TEMP, M_WAITOK);
842
843 #ifdef __notyet__
844 /*
845 * Check if the filesystem sets f_maxfilesize; if not use
846 * VOP_SETATTR to perform the check.
847 */
848 sfs = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK);
849 error = VFS_STATFS(vp->v_mount, sfs, td);
850 if (error == 0)
851 maxfilesize = sfs->f_maxfilesize;
852 free(sfs, M_STATFS);
853 if (error != 0)
854 goto out;
855 if (maxfilesize) {
856 if (offset > maxfilesize || len > maxfilesize ||
857 offset + len > maxfilesize) {
858 error = EFBIG;
859 goto out;
860 }
861 } else
862 #endif
863 if (offset + len > vap->va_size) {
864 /*
865 * Test offset + len against the filesystem's maxfilesize.
866 */
867 VATTR_NULL(vap);
868 vap->va_size = offset + len;
869 error = VOP_SETATTR(vp, vap, ap->a_cred);
870 if (error != 0)
871 goto out;
872 VATTR_NULL(vap);
873 vap->va_size = fsize;
874 error = VOP_SETATTR(vp, vap, ap->a_cred);
875 if (error != 0)
876 goto out;
877 }
878
879 for (;;) {
880 /*
881 * Read and write back anything below the nominal file
882 * size. There's currently no way outside the filesystem
883 * to know whether this area is sparse or not.
884 */
885 cur = iosize;
886 if ((offset % iosize) != 0)
887 cur -= (offset % iosize);
888 if (cur > len)
889 cur = len;
890 if (offset < fsize) {
891 aiov.iov_base = buf;
892 aiov.iov_len = cur;
893 auio.uio_iov = &aiov;
894 auio.uio_iovcnt = 1;
895 auio.uio_offset = offset;
896 auio.uio_resid = cur;
897 auio.uio_segflg = UIO_SYSSPACE;
898 auio.uio_rw = UIO_READ;
899 auio.uio_td = td;
900 error = VOP_READ(vp, &auio, ap->a_ioflag, ap->a_cred);
901 if (error != 0)
902 break;
903 if (auio.uio_resid > 0) {
904 bzero(buf + cur - auio.uio_resid,
905 auio.uio_resid);
906 }
907 } else {
908 bzero(buf, cur);
909 }
910
911 aiov.iov_base = buf;
912 aiov.iov_len = cur;
913 auio.uio_iov = &aiov;
914 auio.uio_iovcnt = 1;
915 auio.uio_offset = offset;
916 auio.uio_resid = cur;
917 auio.uio_segflg = UIO_SYSSPACE;
918 auio.uio_rw = UIO_WRITE;
919 auio.uio_td = td;
920
921 error = VOP_WRITE(vp, &auio, ap->a_ioflag, ap->a_cred);
922 if (error != 0)
923 break;
924
925 len -= cur;
926 offset += cur;
927 if (len == 0)
928 break;
929 if (should_yield())
930 break;
931 }
932
933 out:
934 *ap->a_len = len;
935 *ap->a_offset = offset;
936 free(buf, M_TEMP);
937 return (error);
938 }
939
940 int
vop_stdadvise(struct vop_advise_args * ap)941 vop_stdadvise(struct vop_advise_args *ap)
942 {
943 struct vnode *vp;
944 struct bufobj *bo;
945 daddr_t startn, endn;
946 off_t bstart, bend, start, end;
947 int bsize, error;
948
949 vp = ap->a_vp;
950 switch (ap->a_advice) {
951 case POSIX_FADV_WILLNEED:
952 /*
953 * Do nothing for now. Filesystems should provide a
954 * custom method which starts an asynchronous read of
955 * the requested region.
956 */
957 error = 0;
958 break;
959 case POSIX_FADV_DONTNEED:
960 error = 0;
961 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
962 if (VN_IS_DOOMED(vp)) {
963 VOP_UNLOCK(vp);
964 break;
965 }
966
967 /*
968 * Round to block boundaries (and later possibly further to
969 * page boundaries). Applications cannot reasonably be aware
970 * of the boundaries, and the rounding must be to expand at
971 * both extremities to cover enough. It still doesn't cover
972 * read-ahead. For partial blocks, this gives unnecessary
973 * discarding of buffers but is efficient enough since the
974 * pages usually remain in VMIO for some time.
975 */
976 bsize = vp->v_bufobj.bo_bsize;
977 bstart = rounddown(ap->a_start, bsize);
978 bend = roundup(ap->a_end, bsize);
979
980 /*
981 * Deactivate pages in the specified range from the backing VM
982 * object. Pages that are resident in the buffer cache will
983 * remain wired until their corresponding buffers are released
984 * below.
985 */
986 if (vp->v_object != NULL) {
987 start = trunc_page(bstart);
988 end = round_page(bend);
989 VM_OBJECT_RLOCK(vp->v_object);
990 vm_object_page_noreuse(vp->v_object, OFF_TO_IDX(start),
991 OFF_TO_IDX(end));
992 VM_OBJECT_RUNLOCK(vp->v_object);
993 }
994
995 bo = &vp->v_bufobj;
996 BO_RLOCK(bo);
997 startn = bstart / bsize;
998 endn = bend / bsize;
999 error = bnoreuselist(&bo->bo_clean, bo, startn, endn);
1000 if (error == 0)
1001 error = bnoreuselist(&bo->bo_dirty, bo, startn, endn);
1002 BO_RUNLOCK(bo);
1003 VOP_UNLOCK(vp);
1004 break;
1005 default:
1006 error = EINVAL;
1007 break;
1008 }
1009 return (error);
1010 }
1011
1012 int
vop_stdunp_bind(struct vop_unp_bind_args * ap)1013 vop_stdunp_bind(struct vop_unp_bind_args *ap)
1014 {
1015
1016 ap->a_vp->v_unpcb = ap->a_unpcb;
1017 return (0);
1018 }
1019
1020 int
vop_stdunp_connect(struct vop_unp_connect_args * ap)1021 vop_stdunp_connect(struct vop_unp_connect_args *ap)
1022 {
1023
1024 *ap->a_unpcb = ap->a_vp->v_unpcb;
1025 return (0);
1026 }
1027
1028 int
vop_stdunp_detach(struct vop_unp_detach_args * ap)1029 vop_stdunp_detach(struct vop_unp_detach_args *ap)
1030 {
1031
1032 ap->a_vp->v_unpcb = NULL;
1033 return (0);
1034 }
1035
1036 static int
vop_stdis_text(struct vop_is_text_args * ap)1037 vop_stdis_text(struct vop_is_text_args *ap)
1038 {
1039
1040 return (ap->a_vp->v_writecount < 0);
1041 }
1042
1043 int
vop_stdset_text(struct vop_set_text_args * ap)1044 vop_stdset_text(struct vop_set_text_args *ap)
1045 {
1046 struct vnode *vp;
1047 struct mount *mp;
1048 int error, n;
1049
1050 vp = ap->a_vp;
1051
1052 /*
1053 * Avoid the interlock if execs are already present.
1054 */
1055 n = atomic_load_int(&vp->v_writecount);
1056 for (;;) {
1057 if (n > -1) {
1058 break;
1059 }
1060 if (atomic_fcmpset_int(&vp->v_writecount, &n, n - 1)) {
1061 return (0);
1062 }
1063 }
1064
1065 VI_LOCK(vp);
1066 if (vp->v_writecount > 0) {
1067 error = ETXTBSY;
1068 } else {
1069 /*
1070 * If requested by fs, keep a use reference to the
1071 * vnode until the last text reference is released.
1072 */
1073 mp = vp->v_mount;
1074 if (mp != NULL && (mp->mnt_kern_flag & MNTK_TEXT_REFS) != 0 &&
1075 vp->v_writecount == 0) {
1076 VNPASS((vp->v_iflag & VI_TEXT_REF) == 0, vp);
1077 vp->v_iflag |= VI_TEXT_REF;
1078 vrefl(vp);
1079 }
1080
1081 atomic_subtract_int(&vp->v_writecount, 1);
1082 error = 0;
1083 }
1084 VI_UNLOCK(vp);
1085 return (error);
1086 }
1087
1088 static int
vop_stdunset_text(struct vop_unset_text_args * ap)1089 vop_stdunset_text(struct vop_unset_text_args *ap)
1090 {
1091 struct vnode *vp;
1092 int error, n;
1093 bool last;
1094
1095 vp = ap->a_vp;
1096
1097 /*
1098 * Avoid the interlock if this is not the last exec.
1099 */
1100 n = atomic_load_int(&vp->v_writecount);
1101 for (;;) {
1102 if (n >= -1) {
1103 break;
1104 }
1105 if (atomic_fcmpset_int(&vp->v_writecount, &n, n + 1)) {
1106 return (0);
1107 }
1108 }
1109
1110 last = false;
1111 VI_LOCK(vp);
1112 if (vp->v_writecount < 0) {
1113 if ((vp->v_iflag & VI_TEXT_REF) != 0 &&
1114 vp->v_writecount == -1) {
1115 last = true;
1116 vp->v_iflag &= ~VI_TEXT_REF;
1117 }
1118 atomic_add_int(&vp->v_writecount, 1);
1119 error = 0;
1120 } else {
1121 error = EINVAL;
1122 }
1123 VI_UNLOCK(vp);
1124 if (last)
1125 vunref(vp);
1126 return (error);
1127 }
1128
1129 static int
vop_stdadd_writecount(struct vop_add_writecount_args * ap)1130 vop_stdadd_writecount(struct vop_add_writecount_args *ap)
1131 {
1132 struct vnode *vp;
1133 struct mount *mp;
1134 int error;
1135
1136 vp = ap->a_vp;
1137 VI_LOCK_FLAGS(vp, MTX_DUPOK);
1138 if (vp->v_writecount < 0) {
1139 error = ETXTBSY;
1140 } else {
1141 VNASSERT(vp->v_writecount + ap->a_inc >= 0, vp,
1142 ("neg writecount increment %d", ap->a_inc));
1143 if (vp->v_writecount == 0) {
1144 mp = vp->v_mount;
1145 if (mp != NULL && (mp->mnt_kern_flag & MNTK_NOMSYNC) == 0)
1146 vlazy(vp);
1147 }
1148 vp->v_writecount += ap->a_inc;
1149 error = 0;
1150 }
1151 VI_UNLOCK(vp);
1152 return (error);
1153 }
1154
1155 int
vop_stdneed_inactive(struct vop_need_inactive_args * ap)1156 vop_stdneed_inactive(struct vop_need_inactive_args *ap)
1157 {
1158
1159 return (1);
1160 }
1161
1162 int
vop_stdioctl(struct vop_ioctl_args * ap)1163 vop_stdioctl(struct vop_ioctl_args *ap)
1164 {
1165 struct vnode *vp;
1166 struct vattr va;
1167 off_t *offp;
1168 int error;
1169
1170 switch (ap->a_command) {
1171 case FIOSEEKDATA:
1172 case FIOSEEKHOLE:
1173 vp = ap->a_vp;
1174 error = vn_lock(vp, LK_SHARED);
1175 if (error != 0)
1176 return (EBADF);
1177 if (vp->v_type == VREG)
1178 error = VOP_GETATTR(vp, &va, ap->a_cred);
1179 else
1180 error = ENOTTY;
1181 if (error == 0) {
1182 offp = ap->a_data;
1183 if (*offp < 0 || *offp >= va.va_size)
1184 error = ENXIO;
1185 else if (ap->a_command == FIOSEEKHOLE)
1186 *offp = va.va_size;
1187 }
1188 VOP_UNLOCK(vp);
1189 break;
1190 default:
1191 error = ENOTTY;
1192 break;
1193 }
1194 return (error);
1195 }
1196
1197 /*
1198 * vfs default ops
1199 * used to fill the vfs function table to get reasonable default return values.
1200 */
1201 int
vfs_stdroot(struct mount * mp,int flags,struct vnode ** vpp)1202 vfs_stdroot(struct mount *mp, int flags, struct vnode **vpp)
1203 {
1204
1205 return (EOPNOTSUPP);
1206 }
1207
1208 int
vfs_stdstatfs(struct mount * mp,struct statfs * sbp)1209 vfs_stdstatfs(struct mount *mp, struct statfs *sbp)
1210 {
1211
1212 return (EOPNOTSUPP);
1213 }
1214
1215 int
vfs_stdquotactl(struct mount * mp,int cmds,uid_t uid,void * arg)1216 vfs_stdquotactl(struct mount *mp, int cmds, uid_t uid, void *arg)
1217 {
1218
1219 return (EOPNOTSUPP);
1220 }
1221
1222 int
vfs_stdsync(struct mount * mp,int waitfor)1223 vfs_stdsync(struct mount *mp, int waitfor)
1224 {
1225 struct vnode *vp, *mvp;
1226 struct thread *td;
1227 int error, lockreq, allerror = 0;
1228
1229 td = curthread;
1230 lockreq = LK_EXCLUSIVE | LK_INTERLOCK;
1231 if (waitfor != MNT_WAIT)
1232 lockreq |= LK_NOWAIT;
1233 /*
1234 * Force stale buffer cache information to be flushed.
1235 */
1236 loop:
1237 MNT_VNODE_FOREACH_ALL(vp, mp, mvp) {
1238 if (vp->v_bufobj.bo_dirty.bv_cnt == 0) {
1239 VI_UNLOCK(vp);
1240 continue;
1241 }
1242 if ((error = vget(vp, lockreq)) != 0) {
1243 if (error == ENOENT) {
1244 MNT_VNODE_FOREACH_ALL_ABORT(mp, mvp);
1245 goto loop;
1246 }
1247 continue;
1248 }
1249 error = VOP_FSYNC(vp, waitfor, td);
1250 if (error)
1251 allerror = error;
1252 vput(vp);
1253 }
1254 return (allerror);
1255 }
1256
1257 int
vfs_stdnosync(struct mount * mp,int waitfor)1258 vfs_stdnosync(struct mount *mp, int waitfor)
1259 {
1260
1261 return (0);
1262 }
1263
1264 static int
vop_stdcopy_file_range(struct vop_copy_file_range_args * ap)1265 vop_stdcopy_file_range(struct vop_copy_file_range_args *ap)
1266 {
1267 int error;
1268
1269 error = vn_generic_copy_file_range(ap->a_invp, ap->a_inoffp,
1270 ap->a_outvp, ap->a_outoffp, ap->a_lenp, ap->a_flags, ap->a_incred,
1271 ap->a_outcred, ap->a_fsizetd);
1272 return (error);
1273 }
1274
1275 int
vfs_stdvget(struct mount * mp,ino_t ino,int flags,struct vnode ** vpp)1276 vfs_stdvget(struct mount *mp, ino_t ino, int flags, struct vnode **vpp)
1277 {
1278
1279 return (EOPNOTSUPP);
1280 }
1281
1282 int
vfs_stdfhtovp(struct mount * mp,struct fid * fhp,int flags,struct vnode ** vpp)1283 vfs_stdfhtovp(struct mount *mp, struct fid *fhp, int flags, struct vnode **vpp)
1284 {
1285
1286 return (EOPNOTSUPP);
1287 }
1288
1289 int
vfs_stdinit(struct vfsconf * vfsp)1290 vfs_stdinit(struct vfsconf *vfsp)
1291 {
1292
1293 return (0);
1294 }
1295
1296 int
vfs_stduninit(struct vfsconf * vfsp)1297 vfs_stduninit(struct vfsconf *vfsp)
1298 {
1299
1300 return(0);
1301 }
1302
1303 int
vfs_stdextattrctl(struct mount * mp,int cmd,struct vnode * filename_vp,int attrnamespace,const char * attrname)1304 vfs_stdextattrctl(struct mount *mp, int cmd, struct vnode *filename_vp,
1305 int attrnamespace, const char *attrname)
1306 {
1307
1308 if (filename_vp != NULL)
1309 VOP_UNLOCK(filename_vp);
1310 return (EOPNOTSUPP);
1311 }
1312
1313 int
vfs_stdsysctl(struct mount * mp,fsctlop_t op,struct sysctl_req * req)1314 vfs_stdsysctl(struct mount *mp, fsctlop_t op, struct sysctl_req *req)
1315 {
1316
1317 return (EOPNOTSUPP);
1318 }
1319
1320 static vop_bypass_t *
bp_by_off(struct vop_vector * vop,struct vop_generic_args * a)1321 bp_by_off(struct vop_vector *vop, struct vop_generic_args *a)
1322 {
1323
1324 return (*(vop_bypass_t **)((char *)vop + a->a_desc->vdesc_vop_offset));
1325 }
1326
1327 int
vop_sigdefer(struct vop_vector * vop,struct vop_generic_args * a)1328 vop_sigdefer(struct vop_vector *vop, struct vop_generic_args *a)
1329 {
1330 vop_bypass_t *bp;
1331 int prev_stops, rc;
1332
1333 bp = bp_by_off(vop, a);
1334 MPASS(bp != NULL);
1335
1336 prev_stops = sigdeferstop(SIGDEFERSTOP_SILENT);
1337 rc = bp(a);
1338 sigallowstop(prev_stops);
1339 return (rc);
1340 }
1341
1342 static int
vop_stdstat(struct vop_stat_args * a)1343 vop_stdstat(struct vop_stat_args *a)
1344 {
1345 struct vattr vattr;
1346 struct vattr *vap;
1347 struct vnode *vp;
1348 struct stat *sb;
1349 int error;
1350 u_short mode;
1351
1352 vp = a->a_vp;
1353 sb = a->a_sb;
1354
1355 error = vop_stat_helper_pre(a);
1356 if (error != 0)
1357 return (error);
1358
1359 vap = &vattr;
1360
1361 /*
1362 * Initialize defaults for new and unusual fields, so that file
1363 * systems which don't support these fields don't need to know
1364 * about them.
1365 */
1366 vap->va_birthtime.tv_sec = -1;
1367 vap->va_birthtime.tv_nsec = 0;
1368 vap->va_fsid = VNOVAL;
1369 vap->va_rdev = NODEV;
1370
1371 error = VOP_GETATTR(vp, vap, a->a_active_cred);
1372 if (error)
1373 goto out;
1374
1375 /*
1376 * Zero the spare stat fields
1377 */
1378 bzero(sb, sizeof *sb);
1379
1380 /*
1381 * Copy from vattr table
1382 */
1383 if (vap->va_fsid != VNOVAL)
1384 sb->st_dev = vap->va_fsid;
1385 else
1386 sb->st_dev = vp->v_mount->mnt_stat.f_fsid.val[0];
1387 sb->st_ino = vap->va_fileid;
1388 mode = vap->va_mode;
1389 switch (vap->va_type) {
1390 case VREG:
1391 mode |= S_IFREG;
1392 break;
1393 case VDIR:
1394 mode |= S_IFDIR;
1395 break;
1396 case VBLK:
1397 mode |= S_IFBLK;
1398 break;
1399 case VCHR:
1400 mode |= S_IFCHR;
1401 break;
1402 case VLNK:
1403 mode |= S_IFLNK;
1404 break;
1405 case VSOCK:
1406 mode |= S_IFSOCK;
1407 break;
1408 case VFIFO:
1409 mode |= S_IFIFO;
1410 break;
1411 default:
1412 error = EBADF;
1413 goto out;
1414 }
1415 sb->st_mode = mode;
1416 sb->st_nlink = vap->va_nlink;
1417 sb->st_uid = vap->va_uid;
1418 sb->st_gid = vap->va_gid;
1419 sb->st_rdev = vap->va_rdev;
1420 if (vap->va_size > OFF_MAX) {
1421 error = EOVERFLOW;
1422 goto out;
1423 }
1424 sb->st_size = vap->va_size;
1425 sb->st_atim.tv_sec = vap->va_atime.tv_sec;
1426 sb->st_atim.tv_nsec = vap->va_atime.tv_nsec;
1427 sb->st_mtim.tv_sec = vap->va_mtime.tv_sec;
1428 sb->st_mtim.tv_nsec = vap->va_mtime.tv_nsec;
1429 sb->st_ctim.tv_sec = vap->va_ctime.tv_sec;
1430 sb->st_ctim.tv_nsec = vap->va_ctime.tv_nsec;
1431 sb->st_birthtim.tv_sec = vap->va_birthtime.tv_sec;
1432 sb->st_birthtim.tv_nsec = vap->va_birthtime.tv_nsec;
1433
1434 /*
1435 * According to www.opengroup.org, the meaning of st_blksize is
1436 * "a filesystem-specific preferred I/O block size for this
1437 * object. In some filesystem types, this may vary from file
1438 * to file"
1439 * Use minimum/default of PAGE_SIZE (e.g. for VCHR).
1440 */
1441
1442 sb->st_blksize = max(PAGE_SIZE, vap->va_blocksize);
1443 sb->st_flags = vap->va_flags;
1444 sb->st_blocks = vap->va_bytes / S_BLKSIZE;
1445 sb->st_gen = vap->va_gen;
1446 out:
1447 return (vop_stat_helper_post(a, error));
1448 }
1449
1450 static int
vop_stdread_pgcache(struct vop_read_pgcache_args * ap __unused)1451 vop_stdread_pgcache(struct vop_read_pgcache_args *ap __unused)
1452 {
1453 return (EJUSTRETURN);
1454 }
1455
1456 static int
vop_stdvput_pair(struct vop_vput_pair_args * ap)1457 vop_stdvput_pair(struct vop_vput_pair_args *ap)
1458 {
1459 struct vnode *dvp, *vp, **vpp;
1460
1461 dvp = ap->a_dvp;
1462 vpp = ap->a_vpp;
1463 vput(dvp);
1464 if (vpp != NULL && ap->a_unlock_vp && (vp = *vpp) != NULL)
1465 vput(vp);
1466 return (0);
1467 }
1468
1469 static int
vop_stdgetlowvnode(struct vop_getlowvnode_args * ap)1470 vop_stdgetlowvnode(struct vop_getlowvnode_args *ap)
1471 {
1472 vref(ap->a_vp);
1473 *ap->a_vplp = ap->a_vp;
1474 return (0);
1475 }
1476