1 /* $NetBSD: tmpfs_vnops.c,v 1.39 2007/07/23 15:41:01 jmmv Exp $ */
2
3 /*-
4 * Copyright (c) 2005, 2006 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Julio M. Merino Vidal, developed as part of Google's Summer of Code
9 * 2005 program.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
30 * POSSIBILITY OF SUCH DAMAGE.
31 */
32
33 /*
34 * tmpfs vnode interface.
35 */
36 #include <sys/cdefs.h>
37 __FBSDID("$FreeBSD: releng/8.0/sys/fs/tmpfs/tmpfs_vnops.c 194124 2009-06-13 20:21:08Z alc $");
38
39 #include <sys/param.h>
40 #include <sys/fcntl.h>
41 #include <sys/lockf.h>
42 #include <sys/namei.h>
43 #include <sys/priv.h>
44 #include <sys/proc.h>
45 #include <sys/resourcevar.h>
46 #include <sys/stat.h>
47 #include <sys/systm.h>
48 #include <sys/unistd.h>
49 #include <sys/vnode.h>
50
51 #include <vm/vm.h>
52 #include <vm/vm_object.h>
53 #include <vm/vm_page.h>
54 #include <vm/vm_pager.h>
55
56 #include <machine/_inttypes.h>
57
58 #include <fs/fifofs/fifo.h>
59 #include <fs/tmpfs/tmpfs_vnops.h>
60 #include <fs/tmpfs/tmpfs.h>
61
62 /* --------------------------------------------------------------------- */
63
64 static int
65 tmpfs_lookup(struct vop_cachedlookup_args *v)
66 {
67 struct vnode *dvp = v->a_dvp;
68 struct vnode **vpp = v->a_vpp;
69 struct componentname *cnp = v->a_cnp;
70
71 int error;
72 struct tmpfs_dirent *de;
73 struct tmpfs_node *dnode;
74
75 dnode = VP_TO_TMPFS_DIR(dvp);
76 *vpp = NULLVP;
77
78 /* Check accessibility of requested node as a first step. */
79 error = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred, cnp->cn_thread);
80 if (error != 0)
81 goto out;
82
83 /* We cannot be requesting the parent directory of the root node. */
84 MPASS(IMPLIES(dnode->tn_type == VDIR &&
85 dnode->tn_dir.tn_parent == dnode,
86 !(cnp->cn_flags & ISDOTDOT)));
87
88 if (cnp->cn_flags & ISDOTDOT) {
89 int ltype = 0;
90
91 ltype = VOP_ISLOCKED(dvp);
92 vhold(dvp);
93 VOP_UNLOCK(dvp, 0);
94 /* Allocate a new vnode on the matching entry. */
95 error = tmpfs_alloc_vp(dvp->v_mount, dnode->tn_dir.tn_parent,
96 cnp->cn_lkflags, vpp);
97
98 vn_lock(dvp, ltype | LK_RETRY);
99 vdrop(dvp);
100 } else if (cnp->cn_namelen == 1 && cnp->cn_nameptr[0] == '.') {
101 VREF(dvp);
102 *vpp = dvp;
103 error = 0;
104 } else {
105 de = tmpfs_dir_lookup(dnode, NULL, cnp);
106 if (de == NULL) {
107 /* The entry was not found in the directory.
108 * This is OK if we are creating or renaming an
109 * entry and are working on the last component of
110 * the path name. */
111 if ((cnp->cn_flags & ISLASTCN) &&
112 (cnp->cn_nameiop == CREATE || \
113 cnp->cn_nameiop == RENAME)) {
114 error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred,
115 cnp->cn_thread);
116 if (error != 0)
117 goto out;
118
119 /* Keep the component name in the buffer for
120 * future uses. */
121 cnp->cn_flags |= SAVENAME;
122
123 error = EJUSTRETURN;
124 } else
125 error = ENOENT;
126 } else {
127 struct tmpfs_node *tnode;
128
129 /* The entry was found, so get its associated
130 * tmpfs_node. */
131 tnode = de->td_node;
132
133 /* If we are not at the last path component and
134 * found a non-directory or non-link entry (which
135 * may itself be pointing to a directory), raise
136 * an error. */
137 if ((tnode->tn_type != VDIR &&
138 tnode->tn_type != VLNK) &&
139 !(cnp->cn_flags & ISLASTCN)) {
140 error = ENOTDIR;
141 goto out;
142 }
143
144 /* If we are deleting or renaming the entry, keep
145 * track of its tmpfs_dirent so that it can be
146 * easily deleted later. */
147 if ((cnp->cn_flags & ISLASTCN) &&
148 (cnp->cn_nameiop == DELETE ||
149 cnp->cn_nameiop == RENAME)) {
150 error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred,
151 cnp->cn_thread);
152 if (error != 0)
153 goto out;
154
155 /* Allocate a new vnode on the matching entry. */
156 error = tmpfs_alloc_vp(dvp->v_mount, tnode,
157 cnp->cn_lkflags, vpp);
158 if (error != 0)
159 goto out;
160
161 if ((dnode->tn_mode & S_ISTXT) &&
162 VOP_ACCESS(dvp, VADMIN, cnp->cn_cred, cnp->cn_thread) &&
163 VOP_ACCESS(*vpp, VADMIN, cnp->cn_cred, cnp->cn_thread)) {
164 error = EPERM;
165 vput(*vpp);
166 *vpp = NULL;
167 goto out;
168 }
169 cnp->cn_flags |= SAVENAME;
170 } else {
171 error = tmpfs_alloc_vp(dvp->v_mount, tnode,
172 cnp->cn_lkflags, vpp);
173 }
174 }
175 }
176
177 /* Store the result of this lookup in the cache. Avoid this if the
178 * request was for creation, as it does not improve timings on
179 * emprical tests. */
180 if ((cnp->cn_flags & MAKEENTRY) && cnp->cn_nameiop != CREATE)
181 cache_enter(dvp, *vpp, cnp);
182
183 out:
184 /* If there were no errors, *vpp cannot be null and it must be
185 * locked. */
186 MPASS(IFF(error == 0, *vpp != NULLVP && VOP_ISLOCKED(*vpp)));
187
188 return error;
189 }
190
191 /* --------------------------------------------------------------------- */
192
193 static int
194 tmpfs_create(struct vop_create_args *v)
195 {
196 struct vnode *dvp = v->a_dvp;
197 struct vnode **vpp = v->a_vpp;
198 struct componentname *cnp = v->a_cnp;
199 struct vattr *vap = v->a_vap;
200
201 MPASS(vap->va_type == VREG || vap->va_type == VSOCK);
202
203 return tmpfs_alloc_file(dvp, vpp, vap, cnp, NULL);
204 }
205 /* --------------------------------------------------------------------- */
206
207 static int
208 tmpfs_mknod(struct vop_mknod_args *v)
209 {
210 struct vnode *dvp = v->a_dvp;
211 struct vnode **vpp = v->a_vpp;
212 struct componentname *cnp = v->a_cnp;
213 struct vattr *vap = v->a_vap;
214
215 if (vap->va_type != VBLK && vap->va_type != VCHR &&
216 vap->va_type != VFIFO)
217 return EINVAL;
218
219 return tmpfs_alloc_file(dvp, vpp, vap, cnp, NULL);
220 }
221
222 /* --------------------------------------------------------------------- */
223
224 static int
225 tmpfs_open(struct vop_open_args *v)
226 {
227 struct vnode *vp = v->a_vp;
228 int mode = v->a_mode;
229
230 int error;
231 struct tmpfs_node *node;
232
233 MPASS(VOP_ISLOCKED(vp));
234
235 node = VP_TO_TMPFS_NODE(vp);
236
237 /* The file is still active but all its names have been removed
238 * (e.g. by a "rmdir $(pwd)"). It cannot be opened any more as
239 * it is about to die. */
240 if (node->tn_links < 1)
241 return (ENOENT);
242
243 /* If the file is marked append-only, deny write requests. */
244 if (node->tn_flags & APPEND && (mode & (FWRITE | O_APPEND)) == FWRITE)
245 error = EPERM;
246 else {
247 error = 0;
248 vnode_create_vobject(vp, node->tn_size, v->a_td);
249 }
250
251 MPASS(VOP_ISLOCKED(vp));
252 return error;
253 }
254
255 /* --------------------------------------------------------------------- */
256
257 static int
258 tmpfs_close(struct vop_close_args *v)
259 {
260 struct vnode *vp = v->a_vp;
261
262 struct tmpfs_node *node;
263
264 MPASS(VOP_ISLOCKED(vp));
265
266 node = VP_TO_TMPFS_NODE(vp);
267
268 if (node->tn_links > 0) {
269 /* Update node times. No need to do it if the node has
270 * been deleted, because it will vanish after we return. */
271 tmpfs_update(vp);
272 }
273
274 return 0;
275 }
276
277 /* --------------------------------------------------------------------- */
278
279 int
280 tmpfs_access(struct vop_access_args *v)
281 {
282 struct vnode *vp = v->a_vp;
283 accmode_t accmode = v->a_accmode;
284 struct ucred *cred = v->a_cred;
285
286 int error;
287 struct tmpfs_node *node;
288
289 MPASS(VOP_ISLOCKED(vp));
290
291 node = VP_TO_TMPFS_NODE(vp);
292
293 switch (vp->v_type) {
294 case VDIR:
295 /* FALLTHROUGH */
296 case VLNK:
297 /* FALLTHROUGH */
298 case VREG:
299 if (accmode & VWRITE && vp->v_mount->mnt_flag & MNT_RDONLY) {
300 error = EROFS;
301 goto out;
302 }
303 break;
304
305 case VBLK:
306 /* FALLTHROUGH */
307 case VCHR:
308 /* FALLTHROUGH */
309 case VSOCK:
310 /* FALLTHROUGH */
311 case VFIFO:
312 break;
313
314 default:
315 error = EINVAL;
316 goto out;
317 }
318
319 if (accmode & VWRITE && node->tn_flags & IMMUTABLE) {
320 error = EPERM;
321 goto out;
322 }
323
324 error = vaccess(vp->v_type, node->tn_mode, node->tn_uid,
325 node->tn_gid, accmode, cred, NULL);
326
327 out:
328 MPASS(VOP_ISLOCKED(vp));
329
330 return error;
331 }
332
333 /* --------------------------------------------------------------------- */
334
335 int
336 tmpfs_getattr(struct vop_getattr_args *v)
337 {
338 struct vnode *vp = v->a_vp;
339 struct vattr *vap = v->a_vap;
340
341 struct tmpfs_node *node;
342
343 node = VP_TO_TMPFS_NODE(vp);
344
345 tmpfs_update(vp);
346
347 vap->va_type = vp->v_type;
348 vap->va_mode = node->tn_mode;
349 vap->va_nlink = node->tn_links;
350 vap->va_uid = node->tn_uid;
351 vap->va_gid = node->tn_gid;
352 vap->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0];
353 vap->va_fileid = node->tn_id;
354 vap->va_size = node->tn_size;
355 vap->va_blocksize = PAGE_SIZE;
356 vap->va_atime = node->tn_atime;
357 vap->va_mtime = node->tn_mtime;
358 vap->va_ctime = node->tn_ctime;
359 vap->va_birthtime = node->tn_birthtime;
360 vap->va_gen = node->tn_gen;
361 vap->va_flags = node->tn_flags;
362 vap->va_rdev = (vp->v_type == VBLK || vp->v_type == VCHR) ?
363 node->tn_rdev : NODEV;
364 vap->va_bytes = round_page(node->tn_size);
365 vap->va_filerev = 0;
366
367 return 0;
368 }
369
370 /* --------------------------------------------------------------------- */
371
372 /* XXX Should this operation be atomic? I think it should, but code in
373 * XXX other places (e.g., ufs) doesn't seem to be... */
374 int
375 tmpfs_setattr(struct vop_setattr_args *v)
376 {
377 struct vnode *vp = v->a_vp;
378 struct vattr *vap = v->a_vap;
379 struct ucred *cred = v->a_cred;
380 struct thread *td = curthread;
381
382 int error;
383
384 MPASS(VOP_ISLOCKED(vp));
385
386 error = 0;
387
388 /* Abort if any unsettable attribute is given. */
389 if (vap->va_type != VNON ||
390 vap->va_nlink != VNOVAL ||
391 vap->va_fsid != VNOVAL ||
392 vap->va_fileid != VNOVAL ||
393 vap->va_blocksize != VNOVAL ||
394 vap->va_gen != VNOVAL ||
395 vap->va_rdev != VNOVAL ||
396 vap->va_bytes != VNOVAL)
397 error = EINVAL;
398
399 if (error == 0 && (vap->va_flags != VNOVAL))
400 error = tmpfs_chflags(vp, vap->va_flags, cred, td);
401
402 if (error == 0 && (vap->va_size != VNOVAL))
403 error = tmpfs_chsize(vp, vap->va_size, cred, td);
404
405 if (error == 0 && (vap->va_uid != VNOVAL || vap->va_gid != VNOVAL))
406 error = tmpfs_chown(vp, vap->va_uid, vap->va_gid, cred, td);
407
408 if (error == 0 && (vap->va_mode != (mode_t)VNOVAL))
409 error = tmpfs_chmod(vp, vap->va_mode, cred, td);
410
411 if (error == 0 && ((vap->va_atime.tv_sec != VNOVAL &&
412 vap->va_atime.tv_nsec != VNOVAL) ||
413 (vap->va_mtime.tv_sec != VNOVAL &&
414 vap->va_mtime.tv_nsec != VNOVAL) ||
415 (vap->va_birthtime.tv_sec != VNOVAL &&
416 vap->va_birthtime.tv_nsec != VNOVAL)))
417 error = tmpfs_chtimes(vp, &vap->va_atime, &vap->va_mtime,
418 &vap->va_birthtime, vap->va_vaflags, cred, td);
419
420 /* Update the node times. We give preference to the error codes
421 * generated by this function rather than the ones that may arise
422 * from tmpfs_update. */
423 tmpfs_update(vp);
424
425 MPASS(VOP_ISLOCKED(vp));
426
427 return error;
428 }
429
430 /* --------------------------------------------------------------------- */
431
432 static int
433 tmpfs_mappedread(vm_object_t vobj, vm_object_t tobj, size_t len, struct uio *uio)
434 {
435 vm_pindex_t idx;
436 vm_page_t m;
437 vm_offset_t offset;
438 off_t addr;
439 size_t tlen;
440 int error;
441
442 addr = uio->uio_offset;
443 idx = OFF_TO_IDX(addr);
444 offset = addr & PAGE_MASK;
445 tlen = MIN(PAGE_SIZE - offset, len);
446
447 if ((vobj == NULL) || (vobj->resident_page_count == 0))
448 goto nocache;
449
450 VM_OBJECT_LOCK(vobj);
451 lookupvpg:
452 if (((m = vm_page_lookup(vobj, idx)) != NULL) &&
453 vm_page_is_valid(m, offset, tlen)) {
454 if (vm_page_sleep_if_busy(m, FALSE, "tmfsmr"))
455 goto lookupvpg;
456 vm_page_busy(m);
457 VM_OBJECT_UNLOCK(vobj);
458 error = uiomove_fromphys(&m, offset, tlen, uio);
459 VM_OBJECT_LOCK(vobj);
460 vm_page_wakeup(m);
461 VM_OBJECT_UNLOCK(vobj);
462 return (error);
463 }
464 VM_OBJECT_UNLOCK(vobj);
465 nocache:
466 VM_OBJECT_LOCK(tobj);
467 vm_object_pip_add(tobj, 1);
468 m = vm_page_grab(tobj, idx, VM_ALLOC_WIRED |
469 VM_ALLOC_ZERO | VM_ALLOC_NORMAL | VM_ALLOC_RETRY);
470 if (m->valid != VM_PAGE_BITS_ALL) {
471 if (vm_pager_has_page(tobj, idx, NULL, NULL)) {
472 error = vm_pager_get_pages(tobj, &m, 1, 0);
473 if (error != 0) {
474 printf("tmpfs get pages from pager error [read]\n");
475 goto out;
476 }
477 } else
478 vm_page_zero_invalid(m, TRUE);
479 }
480 VM_OBJECT_UNLOCK(tobj);
481 error = uiomove_fromphys(&m, offset, tlen, uio);
482 VM_OBJECT_LOCK(tobj);
483 out:
484 vm_page_lock_queues();
485 vm_page_unwire(m, TRUE);
486 vm_page_unlock_queues();
487 vm_page_wakeup(m);
488 vm_object_pip_subtract(tobj, 1);
489 VM_OBJECT_UNLOCK(tobj);
490
491 return (error);
492 }
493
494 static int
495 tmpfs_read(struct vop_read_args *v)
496 {
497 struct vnode *vp = v->a_vp;
498 struct uio *uio = v->a_uio;
499
500 struct tmpfs_node *node;
501 vm_object_t uobj;
502 size_t len;
503 int resid;
504
505 int error = 0;
506
507 node = VP_TO_TMPFS_NODE(vp);
508
509 if (vp->v_type != VREG) {
510 error = EISDIR;
511 goto out;
512 }
513
514 if (uio->uio_offset < 0) {
515 error = EINVAL;
516 goto out;
517 }
518
519 node->tn_status |= TMPFS_NODE_ACCESSED;
520
521 uobj = node->tn_reg.tn_aobj;
522 while ((resid = uio->uio_resid) > 0) {
523 error = 0;
524 if (node->tn_size <= uio->uio_offset)
525 break;
526 len = MIN(node->tn_size - uio->uio_offset, resid);
527 if (len == 0)
528 break;
529 error = tmpfs_mappedread(vp->v_object, uobj, len, uio);
530 if ((error != 0) || (resid == uio->uio_resid))
531 break;
532 }
533
534 out:
535
536 return error;
537 }
538
539 /* --------------------------------------------------------------------- */
540
541 static int
542 tmpfs_mappedwrite(vm_object_t vobj, vm_object_t tobj, size_t len, struct uio *uio)
543 {
544 vm_pindex_t idx;
545 vm_page_t vpg, tpg;
546 vm_offset_t offset;
547 off_t addr;
548 size_t tlen;
549 int error;
550
551 error = 0;
552
553 addr = uio->uio_offset;
554 idx = OFF_TO_IDX(addr);
555 offset = addr & PAGE_MASK;
556 tlen = MIN(PAGE_SIZE - offset, len);
557
558 if ((vobj == NULL) || (vobj->resident_page_count == 0)) {
559 vpg = NULL;
560 goto nocache;
561 }
562
563 VM_OBJECT_LOCK(vobj);
564 lookupvpg:
565 if (((vpg = vm_page_lookup(vobj, idx)) != NULL) &&
566 vm_page_is_valid(vpg, offset, tlen)) {
567 if (vm_page_sleep_if_busy(vpg, FALSE, "tmfsmw"))
568 goto lookupvpg;
569 vm_page_busy(vpg);
570 vm_page_lock_queues();
571 vm_page_undirty(vpg);
572 vm_page_unlock_queues();
573 VM_OBJECT_UNLOCK(vobj);
574 error = uiomove_fromphys(&vpg, offset, tlen, uio);
575 } else {
576 VM_OBJECT_UNLOCK(vobj);
577 vpg = NULL;
578 }
579 nocache:
580 VM_OBJECT_LOCK(tobj);
581 vm_object_pip_add(tobj, 1);
582 tpg = vm_page_grab(tobj, idx, VM_ALLOC_WIRED |
583 VM_ALLOC_ZERO | VM_ALLOC_NORMAL | VM_ALLOC_RETRY);
584 if (tpg->valid != VM_PAGE_BITS_ALL) {
585 if (vm_pager_has_page(tobj, idx, NULL, NULL)) {
586 error = vm_pager_get_pages(tobj, &tpg, 1, 0);
587 if (error != 0) {
588 printf("tmpfs get pages from pager error [write]\n");
589 goto out;
590 }
591 } else
592 vm_page_zero_invalid(tpg, TRUE);
593 }
594 VM_OBJECT_UNLOCK(tobj);
595 if (vpg == NULL)
596 error = uiomove_fromphys(&tpg, offset, tlen, uio);
597 else {
598 KASSERT(vpg->valid == VM_PAGE_BITS_ALL, ("parts of vpg invalid"));
599 pmap_copy_page(vpg, tpg);
600 }
601 VM_OBJECT_LOCK(tobj);
602 out:
603 if (vobj != NULL)
604 VM_OBJECT_LOCK(vobj);
605 vm_page_lock_queues();
606 if (error == 0) {
607 KASSERT(tpg->valid == VM_PAGE_BITS_ALL,
608 ("parts of tpg invalid"));
609 vm_page_dirty(tpg);
610 }
611 vm_page_unwire(tpg, TRUE);
612 vm_page_unlock_queues();
613 vm_page_wakeup(tpg);
614 if (vpg != NULL)
615 vm_page_wakeup(vpg);
616 if (vobj != NULL)
617 VM_OBJECT_UNLOCK(vobj);
618 vm_object_pip_subtract(tobj, 1);
619 VM_OBJECT_UNLOCK(tobj);
620
621 return (error);
622 }
623
624 static int
625 tmpfs_write(struct vop_write_args *v)
626 {
627 struct vnode *vp = v->a_vp;
628 struct uio *uio = v->a_uio;
629 int ioflag = v->a_ioflag;
630 struct thread *td = uio->uio_td;
631
632 boolean_t extended;
633 int error = 0;
634 off_t oldsize;
635 struct tmpfs_node *node;
636 vm_object_t uobj;
637 size_t len;
638 int resid;
639
640 node = VP_TO_TMPFS_NODE(vp);
641 oldsize = node->tn_size;
642
643 if (uio->uio_offset < 0 || vp->v_type != VREG) {
644 error = EINVAL;
645 goto out;
646 }
647
648 if (uio->uio_resid == 0) {
649 error = 0;
650 goto out;
651 }
652
653 if (ioflag & IO_APPEND)
654 uio->uio_offset = node->tn_size;
655
656 if (uio->uio_offset + uio->uio_resid >
657 VFS_TO_TMPFS(vp->v_mount)->tm_maxfilesize)
658 return (EFBIG);
659
660 if (vp->v_type == VREG && td != NULL) {
661 PROC_LOCK(td->td_proc);
662 if (uio->uio_offset + uio->uio_resid >
663 lim_cur(td->td_proc, RLIMIT_FSIZE)) {
664 psignal(td->td_proc, SIGXFSZ);
665 PROC_UNLOCK(td->td_proc);
666 return (EFBIG);
667 }
668 PROC_UNLOCK(td->td_proc);
669 }
670
671 extended = uio->uio_offset + uio->uio_resid > node->tn_size;
672 if (extended) {
673 error = tmpfs_reg_resize(vp, uio->uio_offset + uio->uio_resid);
674 if (error != 0)
675 goto out;
676 }
677
678 uobj = node->tn_reg.tn_aobj;
679 while ((resid = uio->uio_resid) > 0) {
680 if (node->tn_size <= uio->uio_offset)
681 break;
682 len = MIN(node->tn_size - uio->uio_offset, resid);
683 if (len == 0)
684 break;
685 error = tmpfs_mappedwrite(vp->v_object, uobj, len, uio);
686 if ((error != 0) || (resid == uio->uio_resid))
687 break;
688 }
689
690 node->tn_status |= TMPFS_NODE_ACCESSED | TMPFS_NODE_MODIFIED |
691 (extended ? TMPFS_NODE_CHANGED : 0);
692
693 if (node->tn_mode & (S_ISUID | S_ISGID)) {
694 if (priv_check_cred(v->a_cred, PRIV_VFS_RETAINSUGID, 0))
695 node->tn_mode &= ~(S_ISUID | S_ISGID);
696 }
697
698 if (error != 0)
699 (void)tmpfs_reg_resize(vp, oldsize);
700
701 out:
702 MPASS(IMPLIES(error == 0, uio->uio_resid == 0));
703 MPASS(IMPLIES(error != 0, oldsize == node->tn_size));
704
705 return error;
706 }
707
708 /* --------------------------------------------------------------------- */
709
710 static int
711 tmpfs_fsync(struct vop_fsync_args *v)
712 {
713 struct vnode *vp = v->a_vp;
714
715 MPASS(VOP_ISLOCKED(vp));
716
717 tmpfs_update(vp);
718
719 return 0;
720 }
721
722 /* --------------------------------------------------------------------- */
723
724 static int
725 tmpfs_remove(struct vop_remove_args *v)
726 {
727 struct vnode *dvp = v->a_dvp;
728 struct vnode *vp = v->a_vp;
729
730 int error;
731 struct tmpfs_dirent *de;
732 struct tmpfs_mount *tmp;
733 struct tmpfs_node *dnode;
734 struct tmpfs_node *node;
735
736 MPASS(VOP_ISLOCKED(dvp));
737 MPASS(VOP_ISLOCKED(vp));
738
739 if (vp->v_type == VDIR) {
740 error = EISDIR;
741 goto out;
742 }
743
744 dnode = VP_TO_TMPFS_DIR(dvp);
745 node = VP_TO_TMPFS_NODE(vp);
746 tmp = VFS_TO_TMPFS(vp->v_mount);
747 de = tmpfs_dir_lookup(dnode, node, v->a_cnp);
748 MPASS(de != NULL);
749
750 /* Files marked as immutable or append-only cannot be deleted. */
751 if ((node->tn_flags & (IMMUTABLE | APPEND | NOUNLINK)) ||
752 (dnode->tn_flags & APPEND)) {
753 error = EPERM;
754 goto out;
755 }
756
757 /* Remove the entry from the directory; as it is a file, we do not
758 * have to change the number of hard links of the directory. */
759 tmpfs_dir_detach(dvp, de);
760
761 /* Free the directory entry we just deleted. Note that the node
762 * referred by it will not be removed until the vnode is really
763 * reclaimed. */
764 tmpfs_free_dirent(tmp, de, TRUE);
765
766 if (node->tn_links > 0)
767 node->tn_status |= TMPFS_NODE_ACCESSED | TMPFS_NODE_CHANGED | \
768 TMPFS_NODE_MODIFIED;
769 error = 0;
770
771 out:
772
773 return error;
774 }
775
776 /* --------------------------------------------------------------------- */
777
778 static int
779 tmpfs_link(struct vop_link_args *v)
780 {
781 struct vnode *dvp = v->a_tdvp;
782 struct vnode *vp = v->a_vp;
783 struct componentname *cnp = v->a_cnp;
784
785 int error;
786 struct tmpfs_dirent *de;
787 struct tmpfs_node *node;
788
789 MPASS(VOP_ISLOCKED(dvp));
790 MPASS(cnp->cn_flags & HASBUF);
791 MPASS(dvp != vp); /* XXX When can this be false? */
792
793 node = VP_TO_TMPFS_NODE(vp);
794
795 /* XXX: Why aren't the following two tests done by the caller? */
796
797 /* Hard links of directories are forbidden. */
798 if (vp->v_type == VDIR) {
799 error = EPERM;
800 goto out;
801 }
802
803 /* Cannot create cross-device links. */
804 if (dvp->v_mount != vp->v_mount) {
805 error = EXDEV;
806 goto out;
807 }
808
809 /* Ensure that we do not overflow the maximum number of links imposed
810 * by the system. */
811 MPASS(node->tn_links <= LINK_MAX);
812 if (node->tn_links == LINK_MAX) {
813 error = EMLINK;
814 goto out;
815 }
816
817 /* We cannot create links of files marked immutable or append-only. */
818 if (node->tn_flags & (IMMUTABLE | APPEND)) {
819 error = EPERM;
820 goto out;
821 }
822
823 /* Allocate a new directory entry to represent the node. */
824 error = tmpfs_alloc_dirent(VFS_TO_TMPFS(vp->v_mount), node,
825 cnp->cn_nameptr, cnp->cn_namelen, &de);
826 if (error != 0)
827 goto out;
828
829 /* Insert the new directory entry into the appropriate directory. */
830 tmpfs_dir_attach(dvp, de);
831
832 /* vp link count has changed, so update node times. */
833 node->tn_status |= TMPFS_NODE_CHANGED;
834 tmpfs_update(vp);
835
836 error = 0;
837
838 out:
839 return error;
840 }
841
842 /* --------------------------------------------------------------------- */
843
844 static int
845 tmpfs_rename(struct vop_rename_args *v)
846 {
847 struct vnode *fdvp = v->a_fdvp;
848 struct vnode *fvp = v->a_fvp;
849 struct componentname *fcnp = v->a_fcnp;
850 struct vnode *tdvp = v->a_tdvp;
851 struct vnode *tvp = v->a_tvp;
852 struct componentname *tcnp = v->a_tcnp;
853
854 char *newname;
855 int error;
856 struct tmpfs_dirent *de;
857 struct tmpfs_node *fdnode;
858 struct tmpfs_node *fnode;
859 struct tmpfs_node *tnode;
860 struct tmpfs_node *tdnode;
861
862 MPASS(VOP_ISLOCKED(tdvp));
863 MPASS(IMPLIES(tvp != NULL, VOP_ISLOCKED(tvp)));
864 MPASS(fcnp->cn_flags & HASBUF);
865 MPASS(tcnp->cn_flags & HASBUF);
866
867 tnode = (tvp == NULL) ? NULL : VP_TO_TMPFS_NODE(tvp);
868
869 /* Disallow cross-device renames.
870 * XXX Why isn't this done by the caller? */
871 if (fvp->v_mount != tdvp->v_mount ||
872 (tvp != NULL && fvp->v_mount != tvp->v_mount)) {
873 error = EXDEV;
874 goto out;
875 }
876
877 tdnode = VP_TO_TMPFS_DIR(tdvp);
878
879 /* If source and target are the same file, there is nothing to do. */
880 if (fvp == tvp) {
881 error = 0;
882 goto out;
883 }
884
885 /* If we need to move the directory between entries, lock the
886 * source so that we can safely operate on it. */
887 if (tdvp != fdvp) {
888 error = vn_lock(fdvp, LK_EXCLUSIVE | LK_RETRY);
889 if (error != 0)
890 goto out;
891 }
892 fdnode = VP_TO_TMPFS_DIR(fdvp);
893 fnode = VP_TO_TMPFS_NODE(fvp);
894 de = tmpfs_dir_lookup(fdnode, fnode, fcnp);
895
896 /* Avoid manipulating '.' and '..' entries. */
897 if (de == NULL) {
898 MPASS(fvp->v_type == VDIR);
899 error = EINVAL;
900 goto out_locked;
901 }
902 MPASS(de->td_node == fnode);
903
904 /* If re-naming a directory to another preexisting directory
905 * ensure that the target directory is empty so that its
906 * removal causes no side effects.
907 * Kern_rename gurantees the destination to be a directory
908 * if the source is one. */
909 if (tvp != NULL) {
910 MPASS(tnode != NULL);
911
912 if ((tnode->tn_flags & (NOUNLINK | IMMUTABLE | APPEND)) ||
913 (tdnode->tn_flags & (APPEND | IMMUTABLE))) {
914 error = EPERM;
915 goto out_locked;
916 }
917
918 if (fnode->tn_type == VDIR && tnode->tn_type == VDIR) {
919 if (tnode->tn_size > 0) {
920 error = ENOTEMPTY;
921 goto out_locked;
922 }
923 } else if (fnode->tn_type == VDIR && tnode->tn_type != VDIR) {
924 error = ENOTDIR;
925 goto out_locked;
926 } else if (fnode->tn_type != VDIR && tnode->tn_type == VDIR) {
927 error = EISDIR;
928 goto out_locked;
929 } else {
930 MPASS(fnode->tn_type != VDIR &&
931 tnode->tn_type != VDIR);
932 }
933 }
934
935 if ((fnode->tn_flags & (NOUNLINK | IMMUTABLE | APPEND))
936 || (fdnode->tn_flags & (APPEND | IMMUTABLE))) {
937 error = EPERM;
938 goto out_locked;
939 }
940
941 /* Ensure that we have enough memory to hold the new name, if it
942 * has to be changed. */
943 if (fcnp->cn_namelen != tcnp->cn_namelen ||
944 bcmp(fcnp->cn_nameptr, tcnp->cn_nameptr, fcnp->cn_namelen) != 0) {
945 newname = malloc(tcnp->cn_namelen, M_TMPFSNAME, M_WAITOK);
946 } else
947 newname = NULL;
948
949 /* If the node is being moved to another directory, we have to do
950 * the move. */
951 if (fdnode != tdnode) {
952 /* In case we are moving a directory, we have to adjust its
953 * parent to point to the new parent. */
954 if (de->td_node->tn_type == VDIR) {
955 struct tmpfs_node *n;
956
957 /* Ensure the target directory is not a child of the
958 * directory being moved. Otherwise, we'd end up
959 * with stale nodes. */
960 n = tdnode;
961 while (n != n->tn_dir.tn_parent) {
962 if (n == fnode) {
963 error = EINVAL;
964 if (newname != NULL)
965 free(newname, M_TMPFSNAME);
966 goto out_locked;
967 }
968 n = n->tn_dir.tn_parent;
969 }
970
971 /* Adjust the parent pointer. */
972 TMPFS_VALIDATE_DIR(fnode);
973 de->td_node->tn_dir.tn_parent = tdnode;
974
975 /* As a result of changing the target of the '..'
976 * entry, the link count of the source and target
977 * directories has to be adjusted. */
978 fdnode->tn_links--;
979 tdnode->tn_links++;
980 }
981
982 /* Do the move: just remove the entry from the source directory
983 * and insert it into the target one. */
984 tmpfs_dir_detach(fdvp, de);
985 tmpfs_dir_attach(tdvp, de);
986 }
987
988 /* If the name has changed, we need to make it effective by changing
989 * it in the directory entry. */
990 if (newname != NULL) {
991 MPASS(tcnp->cn_namelen <= MAXNAMLEN);
992
993 free(de->td_name, M_TMPFSNAME);
994 de->td_namelen = (uint16_t)tcnp->cn_namelen;
995 memcpy(newname, tcnp->cn_nameptr, tcnp->cn_namelen);
996 de->td_name = newname;
997
998 fnode->tn_status |= TMPFS_NODE_CHANGED;
999 tdnode->tn_status |= TMPFS_NODE_MODIFIED;
1000 }
1001
1002 /* If we are overwriting an entry, we have to remove the old one
1003 * from the target directory. */
1004 if (tvp != NULL) {
1005 /* Remove the old entry from the target directory. */
1006 de = tmpfs_dir_lookup(tdnode, tnode, tcnp);
1007 tmpfs_dir_detach(tdvp, de);
1008
1009 /* Free the directory entry we just deleted. Note that the
1010 * node referred by it will not be removed until the vnode is
1011 * really reclaimed. */
1012 tmpfs_free_dirent(VFS_TO_TMPFS(tvp->v_mount), de, TRUE);
1013 }
1014
1015 error = 0;
1016
1017 out_locked:
1018 if (fdnode != tdnode)
1019 VOP_UNLOCK(fdvp, 0);
1020
1021 out:
1022 /* Release target nodes. */
1023 /* XXX: I don't understand when tdvp can be the same as tvp, but
1024 * other code takes care of this... */
1025 if (tdvp == tvp)
1026 vrele(tdvp);
1027 else
1028 vput(tdvp);
1029 if (tvp != NULL)
1030 vput(tvp);
1031
1032 /* Release source nodes. */
1033 vrele(fdvp);
1034 vrele(fvp);
1035
1036 return error;
1037 }
1038
1039 /* --------------------------------------------------------------------- */
1040
1041 static int
1042 tmpfs_mkdir(struct vop_mkdir_args *v)
1043 {
1044 struct vnode *dvp = v->a_dvp;
1045 struct vnode **vpp = v->a_vpp;
1046 struct componentname *cnp = v->a_cnp;
1047 struct vattr *vap = v->a_vap;
1048
1049 MPASS(vap->va_type == VDIR);
1050
1051 return tmpfs_alloc_file(dvp, vpp, vap, cnp, NULL);
1052 }
1053
1054 /* --------------------------------------------------------------------- */
1055
1056 static int
1057 tmpfs_rmdir(struct vop_rmdir_args *v)
1058 {
1059 struct vnode *dvp = v->a_dvp;
1060 struct vnode *vp = v->a_vp;
1061
1062 int error;
1063 struct tmpfs_dirent *de;
1064 struct tmpfs_mount *tmp;
1065 struct tmpfs_node *dnode;
1066 struct tmpfs_node *node;
1067
1068 MPASS(VOP_ISLOCKED(dvp));
1069 MPASS(VOP_ISLOCKED(vp));
1070
1071 tmp = VFS_TO_TMPFS(dvp->v_mount);
1072 dnode = VP_TO_TMPFS_DIR(dvp);
1073 node = VP_TO_TMPFS_DIR(vp);
1074
1075 /* Directories with more than two entries ('.' and '..') cannot be
1076 * removed. */
1077 if (node->tn_size > 0) {
1078 error = ENOTEMPTY;
1079 goto out;
1080 }
1081
1082 if ((dnode->tn_flags & APPEND)
1083 || (node->tn_flags & (NOUNLINK | IMMUTABLE | APPEND))) {
1084 error = EPERM;
1085 goto out;
1086 }
1087
1088 /* This invariant holds only if we are not trying to remove "..".
1089 * We checked for that above so this is safe now. */
1090 MPASS(node->tn_dir.tn_parent == dnode);
1091
1092 /* Get the directory entry associated with node (vp). This was
1093 * filled by tmpfs_lookup while looking up the entry. */
1094 de = tmpfs_dir_lookup(dnode, node, v->a_cnp);
1095 MPASS(TMPFS_DIRENT_MATCHES(de,
1096 v->a_cnp->cn_nameptr,
1097 v->a_cnp->cn_namelen));
1098
1099 /* Check flags to see if we are allowed to remove the directory. */
1100 if (dnode->tn_flags & APPEND
1101 || node->tn_flags & (NOUNLINK | IMMUTABLE | APPEND)) {
1102 error = EPERM;
1103 goto out;
1104 }
1105
1106 /* Detach the directory entry from the directory (dnode). */
1107 tmpfs_dir_detach(dvp, de);
1108
1109 node->tn_links--;
1110 node->tn_status |= TMPFS_NODE_ACCESSED | TMPFS_NODE_CHANGED | \
1111 TMPFS_NODE_MODIFIED;
1112 node->tn_dir.tn_parent->tn_links--;
1113 node->tn_dir.tn_parent->tn_status |= TMPFS_NODE_ACCESSED | \
1114 TMPFS_NODE_CHANGED | TMPFS_NODE_MODIFIED;
1115
1116 cache_purge(dvp);
1117 cache_purge(vp);
1118
1119 /* Free the directory entry we just deleted. Note that the node
1120 * referred by it will not be removed until the vnode is really
1121 * reclaimed. */
1122 tmpfs_free_dirent(tmp, de, TRUE);
1123
1124 /* Release the deleted vnode (will destroy the node, notify
1125 * interested parties and clean it from the cache). */
1126
1127 dnode->tn_status |= TMPFS_NODE_CHANGED;
1128 tmpfs_update(dvp);
1129
1130 error = 0;
1131
1132 out:
1133 return error;
1134 }
1135
1136 /* --------------------------------------------------------------------- */
1137
1138 static int
1139 tmpfs_symlink(struct vop_symlink_args *v)
1140 {
1141 struct vnode *dvp = v->a_dvp;
1142 struct vnode **vpp = v->a_vpp;
1143 struct componentname *cnp = v->a_cnp;
1144 struct vattr *vap = v->a_vap;
1145 char *target = v->a_target;
1146
1147 #ifdef notyet /* XXX FreeBSD BUG: kern_symlink is not setting VLNK */
1148 MPASS(vap->va_type == VLNK);
1149 #else
1150 vap->va_type = VLNK;
1151 #endif
1152
1153 return tmpfs_alloc_file(dvp, vpp, vap, cnp, target);
1154 }
1155
1156 /* --------------------------------------------------------------------- */
1157
1158 static int
1159 tmpfs_readdir(struct vop_readdir_args *v)
1160 {
1161 struct vnode *vp = v->a_vp;
1162 struct uio *uio = v->a_uio;
1163 int *eofflag = v->a_eofflag;
1164 u_long **cookies = v->a_cookies;
1165 int *ncookies = v->a_ncookies;
1166
1167 int error;
1168 off_t startoff;
1169 off_t cnt = 0;
1170 struct tmpfs_node *node;
1171
1172 /* This operation only makes sense on directory nodes. */
1173 if (vp->v_type != VDIR)
1174 return ENOTDIR;
1175
1176 node = VP_TO_TMPFS_DIR(vp);
1177
1178 startoff = uio->uio_offset;
1179
1180 if (uio->uio_offset == TMPFS_DIRCOOKIE_DOT) {
1181 error = tmpfs_dir_getdotdent(node, uio);
1182 if (error != 0)
1183 goto outok;
1184 cnt++;
1185 }
1186
1187 if (uio->uio_offset == TMPFS_DIRCOOKIE_DOTDOT) {
1188 error = tmpfs_dir_getdotdotdent(node, uio);
1189 if (error != 0)
1190 goto outok;
1191 cnt++;
1192 }
1193
1194 error = tmpfs_dir_getdents(node, uio, &cnt);
1195
1196 outok:
1197 MPASS(error >= -1);
1198
1199 if (error == -1)
1200 error = 0;
1201
1202 if (eofflag != NULL)
1203 *eofflag =
1204 (error == 0 && uio->uio_offset == TMPFS_DIRCOOKIE_EOF);
1205
1206 /* Update NFS-related variables. */
1207 if (error == 0 && cookies != NULL && ncookies != NULL) {
1208 off_t i;
1209 off_t off = startoff;
1210 struct tmpfs_dirent *de = NULL;
1211
1212 *ncookies = cnt;
1213 *cookies = malloc(cnt * sizeof(off_t), M_TEMP, M_WAITOK);
1214
1215 for (i = 0; i < cnt; i++) {
1216 MPASS(off != TMPFS_DIRCOOKIE_EOF);
1217 if (off == TMPFS_DIRCOOKIE_DOT) {
1218 off = TMPFS_DIRCOOKIE_DOTDOT;
1219 } else {
1220 if (off == TMPFS_DIRCOOKIE_DOTDOT) {
1221 de = TAILQ_FIRST(&node->tn_dir.tn_dirhead);
1222 } else if (de != NULL) {
1223 de = TAILQ_NEXT(de, td_entries);
1224 } else {
1225 de = tmpfs_dir_lookupbycookie(node,
1226 off);
1227 MPASS(de != NULL);
1228 de = TAILQ_NEXT(de, td_entries);
1229 }
1230 if (de == NULL)
1231 off = TMPFS_DIRCOOKIE_EOF;
1232 else
1233 off = tmpfs_dircookie(de);
1234 }
1235
1236 (*cookies)[i] = off;
1237 }
1238 MPASS(uio->uio_offset == off);
1239 }
1240
1241 return error;
1242 }
1243
1244 /* --------------------------------------------------------------------- */
1245
1246 static int
1247 tmpfs_readlink(struct vop_readlink_args *v)
1248 {
1249 struct vnode *vp = v->a_vp;
1250 struct uio *uio = v->a_uio;
1251
1252 int error;
1253 struct tmpfs_node *node;
1254
1255 MPASS(uio->uio_offset == 0);
1256 MPASS(vp->v_type == VLNK);
1257
1258 node = VP_TO_TMPFS_NODE(vp);
1259
1260 error = uiomove(node->tn_link, MIN(node->tn_size, uio->uio_resid),
1261 uio);
1262 node->tn_status |= TMPFS_NODE_ACCESSED;
1263
1264 return error;
1265 }
1266
1267 /* --------------------------------------------------------------------- */
1268
1269 static int
1270 tmpfs_inactive(struct vop_inactive_args *v)
1271 {
1272 struct vnode *vp = v->a_vp;
1273 struct thread *l = v->a_td;
1274
1275 struct tmpfs_node *node;
1276
1277 MPASS(VOP_ISLOCKED(vp));
1278
1279 node = VP_TO_TMPFS_NODE(vp);
1280
1281 if (node->tn_links == 0)
1282 vrecycle(vp, l);
1283
1284 return 0;
1285 }
1286
1287 /* --------------------------------------------------------------------- */
1288
1289 int
1290 tmpfs_reclaim(struct vop_reclaim_args *v)
1291 {
1292 struct vnode *vp = v->a_vp;
1293
1294 struct tmpfs_mount *tmp;
1295 struct tmpfs_node *node;
1296
1297 node = VP_TO_TMPFS_NODE(vp);
1298 tmp = VFS_TO_TMPFS(vp->v_mount);
1299
1300 vnode_destroy_vobject(vp);
1301 cache_purge(vp);
1302 tmpfs_free_vp(vp);
1303
1304 /* If the node referenced by this vnode was deleted by the user,
1305 * we must free its associated data structures (now that the vnode
1306 * is being reclaimed). */
1307 if (node->tn_links == 0)
1308 tmpfs_free_node(tmp, node);
1309
1310 MPASS(vp->v_data == NULL);
1311 return 0;
1312 }
1313
1314 /* --------------------------------------------------------------------- */
1315
1316 static int
1317 tmpfs_print(struct vop_print_args *v)
1318 {
1319 struct vnode *vp = v->a_vp;
1320
1321 struct tmpfs_node *node;
1322
1323 node = VP_TO_TMPFS_NODE(vp);
1324
1325 printf("tag VT_TMPFS, tmpfs_node %p, flags 0x%x, links %d\n",
1326 node, node->tn_flags, node->tn_links);
1327 printf("\tmode 0%o, owner %d, group %d, size %" PRIdMAX
1328 ", status 0x%x\n",
1329 node->tn_mode, node->tn_uid, node->tn_gid,
1330 (uintmax_t)node->tn_size, node->tn_status);
1331
1332 if (vp->v_type == VFIFO)
1333 fifo_printinfo(vp);
1334
1335 printf("\n");
1336
1337 return 0;
1338 }
1339
1340 /* --------------------------------------------------------------------- */
1341
1342 static int
1343 tmpfs_pathconf(struct vop_pathconf_args *v)
1344 {
1345 int name = v->a_name;
1346 register_t *retval = v->a_retval;
1347
1348 int error;
1349
1350 error = 0;
1351
1352 switch (name) {
1353 case _PC_LINK_MAX:
1354 *retval = LINK_MAX;
1355 break;
1356
1357 case _PC_NAME_MAX:
1358 *retval = NAME_MAX;
1359 break;
1360
1361 case _PC_PATH_MAX:
1362 *retval = PATH_MAX;
1363 break;
1364
1365 case _PC_PIPE_BUF:
1366 *retval = PIPE_BUF;
1367 break;
1368
1369 case _PC_CHOWN_RESTRICTED:
1370 *retval = 1;
1371 break;
1372
1373 case _PC_NO_TRUNC:
1374 *retval = 1;
1375 break;
1376
1377 case _PC_SYNC_IO:
1378 *retval = 1;
1379 break;
1380
1381 case _PC_FILESIZEBITS:
1382 *retval = 0; /* XXX Don't know which value should I return. */
1383 break;
1384
1385 default:
1386 error = EINVAL;
1387 }
1388
1389 return error;
1390 }
1391
1392 static int
1393 tmpfs_vptofh(struct vop_vptofh_args *ap)
1394 {
1395 struct tmpfs_fid *tfhp;
1396 struct tmpfs_node *node;
1397
1398 tfhp = (struct tmpfs_fid *)ap->a_fhp;
1399 node = VP_TO_TMPFS_NODE(ap->a_vp);
1400
1401 tfhp->tf_len = sizeof(struct tmpfs_fid);
1402 tfhp->tf_id = node->tn_id;
1403 tfhp->tf_gen = node->tn_gen;
1404
1405 return (0);
1406 }
1407
1408 /* --------------------------------------------------------------------- */
1409
1410 /*
1411 * vnode operations vector used for files stored in a tmpfs file system.
1412 */
1413 struct vop_vector tmpfs_vnodeop_entries = {
1414 .vop_default = &default_vnodeops,
1415 .vop_lookup = vfs_cache_lookup,
1416 .vop_cachedlookup = tmpfs_lookup,
1417 .vop_create = tmpfs_create,
1418 .vop_mknod = tmpfs_mknod,
1419 .vop_open = tmpfs_open,
1420 .vop_close = tmpfs_close,
1421 .vop_access = tmpfs_access,
1422 .vop_getattr = tmpfs_getattr,
1423 .vop_setattr = tmpfs_setattr,
1424 .vop_read = tmpfs_read,
1425 .vop_write = tmpfs_write,
1426 .vop_fsync = tmpfs_fsync,
1427 .vop_remove = tmpfs_remove,
1428 .vop_link = tmpfs_link,
1429 .vop_rename = tmpfs_rename,
1430 .vop_mkdir = tmpfs_mkdir,
1431 .vop_rmdir = tmpfs_rmdir,
1432 .vop_symlink = tmpfs_symlink,
1433 .vop_readdir = tmpfs_readdir,
1434 .vop_readlink = tmpfs_readlink,
1435 .vop_inactive = tmpfs_inactive,
1436 .vop_reclaim = tmpfs_reclaim,
1437 .vop_print = tmpfs_print,
1438 .vop_pathconf = tmpfs_pathconf,
1439 .vop_vptofh = tmpfs_vptofh,
1440 .vop_bmap = VOP_EOPNOTSUPP,
1441 };
1442
Cache object: 8a09ba16457f08d0cdb8d4c8f32d9ad2
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