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kernel/ext2fs: Fix -Wundef.
[dragonfly.git] / sys / gnu / vfs / ext2fs / ext2_vnops.c
blob2e0f06a3df72650d6b318058da63f672d45e1e02
1 /*
2 * modified for EXT2FS support in Lites 1.1
3 *
4 * Aug 1995, Godmar Back (gback@cs.utah.edu)
5 * University of Utah, Department of Computer Science
6 */
7 /*
8 * Copyright (c) 1982, 1986, 1989, 1993
9 * The Regents of the University of California. All rights reserved.
10 * (c) UNIX System Laboratories, Inc.
11 * All or some portions of this file are derived from material licensed
12 * to the University of California by American Telephone and Telegraph
13 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
14 * the permission of UNIX System Laboratories, Inc.
15 *
16 * Redistribution and use in source and binary forms, with or without
17 * modification, are permitted provided that the following conditions
18 * are met:
19 * 1. Redistributions of source code must retain the above copyright
20 * notice, this list of conditions and the following disclaimer.
21 * 2. Redistributions in binary form must reproduce the above copyright
22 * notice, this list of conditions and the following disclaimer in the
23 * documentation and/or other materials provided with the distribution.
24 * 3. Neither the name of the University nor the names of its contributors
25 * may be used to endorse or promote products derived from this software
26 * without specific prior written permission.
27 *
28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
38 * SUCH DAMAGE.
39 *
40 * @(#)ufs_vnops.c 8.27 (Berkeley) 5/27/95
41 * @(#)ext2_vnops.c 8.7 (Berkeley) 2/3/94
42 * $FreeBSD: src/sys/gnu/ext2fs/ext2_vnops.c,v 1.51.2.2 2003/01/02 17:26:18 bde Exp $
43 */
44
45 #include "opt_quota.h"
46 #include "opt_suiddir.h"
47
48 #include <sys/param.h>
49 #include <sys/systm.h>
50 #include <sys/resourcevar.h>
51 #include <sys/kernel.h>
52 #include <sys/stat.h>
53 #include <sys/fcntl.h>
54 #include <sys/buf.h>
55 #include <sys/proc.h>
56 #include <sys/priv.h>
57 #include <sys/mount.h>
58 #include <sys/time.h>
59 #include <sys/vnode.h>
60 #include <sys/dirent.h>
61 #include <sys/lockf.h>
62 #include <sys/event.h>
63 #include <sys/conf.h>
64 #include <sys/file.h>
65 #include <sys/jail.h>
66 #include <sys/namei.h>
67 #include <sys/signalvar.h>
68 #include <sys/unistd.h>
69
70 #include <vm/vm.h>
71 #include <vm/vm_extern.h>
72 #include <vm/vm_zone.h>
73 #include <vm/vnode_pager.h>
74
75 #include <sys/buf2.h>
76 #include <sys/thread2.h>
77
78 #include <vfs/fifofs/fifo.h>
79
80 #include "dir.h"
81 #include "quota.h"
82 #include "inode.h"
83 #include "ext2_mount.h"
84 #include "ext2_fs_sb.h"
85 #include "fs.h"
86 #include "ext2_extern.h"
87 #include "ext2_fs.h"
88
89 static int ext2_access (struct vop_access_args *);
90 static int ext2_advlock (struct vop_advlock_args *);
91 static int ext2_chmod (struct vnode *, int, struct ucred *);
92 static int ext2_chown (struct vnode *, uid_t, gid_t, struct ucred *);
93 static int ext2_close (struct vop_close_args *);
94 static int ext2_getattr (struct vop_getattr_args *);
95 static int ext2_makeinode (int mode, struct vnode *, struct vnode **, struct componentname *);
96 static int ext2_mmap (struct vop_mmap_args *);
97 static int ext2_open (struct vop_open_args *);
98 static int ext2_pathconf (struct vop_pathconf_args *);
99 static int ext2_print (struct vop_print_args *);
100 static int ext2_readlink (struct vop_readlink_args *);
101 static int ext2_setattr (struct vop_setattr_args *);
102 static int ext2_strategy (struct vop_strategy_args *);
103 static int ext2_whiteout (struct vop_old_whiteout_args *);
104 static int filt_ext2read (struct knote *kn, long hint);
105 static int filt_ext2write (struct knote *kn, long hint);
106 static int filt_ext2vnode (struct knote *kn, long hint);
107 static void filt_ext2detach (struct knote *kn);
108 static int ext2_kqfilter (struct vop_kqfilter_args *ap);
109 static int ext2fifo_close (struct vop_close_args *);
110 static int ext2fifo_kqfilter (struct vop_kqfilter_args *);
111 static int ext2fifo_read (struct vop_read_args *);
112 static int ext2fifo_write (struct vop_write_args *);
113
114 static int ext2_fsync (struct vop_fsync_args *);
115 static int ext2_read (struct vop_read_args *);
116 static int ext2_write (struct vop_write_args *);
117 static int ext2_remove (struct vop_old_remove_args *);
118 static int ext2_link (struct vop_old_link_args *);
119 static int ext2_rename (struct vop_old_rename_args *);
120 static int ext2_mkdir (struct vop_old_mkdir_args *);
121 static int ext2_rmdir (struct vop_old_rmdir_args *);
122 static int ext2_create (struct vop_old_create_args *);
123 static int ext2_mknod (struct vop_old_mknod_args *);
124 static int ext2_symlink (struct vop_old_symlink_args *);
125
126 #include "ext2_readwrite.c"
127
128 union _qcvt {
129 int64_t qcvt;
130 int32_t val[2];
131 };
132 #define SETHIGH(q, h) { \
133 union _qcvt tmp; \
134 tmp.qcvt = (q); \
135 tmp.val[_QUAD_HIGHWORD] = (h); \
136 (q) = tmp.qcvt; \
137 }
138 #define SETLOW(q, l) { \
139 union _qcvt tmp; \
140 tmp.qcvt = (q); \
141 tmp.val[_QUAD_LOWWORD] = (l); \
142 (q) = tmp.qcvt; \
143 }
144 #define VN_KNOTE(vp, b) \
145 KNOTE(&vp->v_pollinfo.vpi_kqinfo.ki_note, (b))
146
147 #define OFSFMT(vp) ((vp)->v_mount->mnt_maxsymlinklen <= 0)
148
149 /*
150 * A virgin directory (no blushing please).
151 * Note that the type and namlen fields are reversed relative to ufs.
152 * Also, we don't use `struct odirtemplate', since it would just cause
153 * endianness problems.
154 */
155 static struct dirtemplate ext2_mastertemplate = {
156 0, 12, 1, EXT2_FT_DIR, ".",
157 0, DIRBLKSIZ - 12, 2, EXT2_FT_DIR, ".."
158 };
159 static struct dirtemplate ext2_omastertemplate = {
160 0, 12, 1, EXT2_FT_UNKNOWN, ".",
161 0, DIRBLKSIZ - 12, 2, EXT2_FT_UNKNOWN, ".."
162 };
163
164 /*
165 * Create a regular file
166 *
167 * ext2_create(struct vnode *a_dvp, struct vnode **a_vpp,
168 * struct componentname *a_cnp, struct vattr *a_vap)
169 */
170 static int
171 ext2_create(struct vop_old_create_args *ap)
172 {
173 int error;
174
175 error =
176 ext2_makeinode(MAKEIMODE(ap->a_vap->va_type, ap->a_vap->va_mode),
177 ap->a_dvp, ap->a_vpp, ap->a_cnp);
178 if (error)
179 return (error);
180 return (0);
181 }
182
183 /*
184 * Synch an open file.
185 *
186 * ext2_fsync(struct vnode *a_vp, struct ucred *a_cred, int a_waitfor,
187 * struct proc *a_p)
188 */
189 /* ARGSUSED */
190
191 static int ext2_fsync_bp(struct buf *bp, void *data);
192
193 struct ext2_fsync_bp_info {
194 struct vnode *vp;
195 int waitfor;
196 };
197
198 static int
199 ext2_fsync(struct vop_fsync_args *ap)
200 {
201 struct ext2_fsync_bp_info info;
202 struct vnode *vp = ap->a_vp;
203 int count;
204
205 /*
206 * XXX why is all this fs specific?
207 */
208
209 /*
210 * Flush all dirty buffers associated with a vnode.
211 */
212 ext2_discard_prealloc(VTOI(vp));
213
214 lwkt_gettoken(&vp->v_token);
215 info.vp = vp;
216 loop:
217 info.waitfor = ap->a_waitfor;
218 count = RB_SCAN(buf_rb_tree, &vp->v_rbdirty_tree, NULL,
219 ext2_fsync_bp, &info);
220 if (count)
221 goto loop;
222
223 if (ap->a_waitfor == MNT_WAIT) {
224 bio_track_wait(&vp->v_track_write, 0, 0);
225 #ifdef DIAGNOSTIC
226 if (!RB_EMPTY(&vp->v_rbdirty_tree)) {
227 vprint("ext2_fsync: dirty", vp);
228 goto loop;
229 }
230 #endif
231 }
232 lwkt_reltoken(&vp->v_token);
233 return (EXT2_UPDATE(ap->a_vp, ap->a_waitfor == MNT_WAIT));
234 }
235
236 static int
237 ext2_fsync_bp(struct buf *bp, void *data)
238 {
239 struct ext2_fsync_bp_info *info = data;
240
241 if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT))
242 return(0);
243 if ((bp->b_flags & B_DELWRI) == 0)
244 panic("ext2_fsync: not dirty");
245 bremfree(bp);
246
247 /*
248 * Wait for I/O associated with indirect blocks to complete,
249 * since there is no way to quickly wait for them below.
250 */
251 if (bp->b_vp == info->vp || (info->waitfor & MNT_NOWAIT))
252 bawrite(bp);
253 else
254 bwrite(bp);
255 return(1);
256 }
257
258 /*
259 * Mknod vnode call
260 *
261 * ext2_mknod(struct vnode *a_dvp, struct vnode **a_vpp,
262 * struct componentname *a_cnp, struct vattr *a_vap)
263 */
264 /* ARGSUSED */
265 static int
266 ext2_mknod(struct vop_old_mknod_args *ap)
267 {
268 struct vattr *vap = ap->a_vap;
269 struct vnode **vpp = ap->a_vpp;
270 struct inode *ip;
271 ino_t ino;
272 int error;
273
274 if (vap->va_rmajor != VNOVAL &&
275 makeudev(vap->va_rmajor, vap->va_rminor) == NOUDEV) {
276 return (EINVAL);
277 }
278
279 error = ext2_makeinode(MAKEIMODE(vap->va_type, vap->va_mode),
280 ap->a_dvp, vpp, ap->a_cnp);
281 if (error)
282 return (error);
283 ip = VTOI(*vpp);
284 ip->i_flag |= IN_ACCESS | IN_CHANGE | IN_UPDATE;
285 if (vap->va_rmajor != VNOVAL) {
286 /*
287 * Want to be able to use this to make badblock
288 * inodes, so don't truncate the dev number.
289 */
290 ip->i_rdev = makeudev(vap->va_rmajor, vap->va_rminor);
291 }
292 /*
293 * Remove inode, then reload it through VFS_VGET so it is
294 * checked to see if it is an alias of an existing entry in
295 * the inode cache.
296 */
297 (*vpp)->v_type = VNON;
298 ino = ip->i_number; /* Save this before vgone() invalidates ip. */
299 vgone_vxlocked(*vpp);
300 vput(*vpp);
301 error = VFS_VGET(ap->a_dvp->v_mount, NULL, ino, vpp);
302 if (error) {
303 *vpp = NULL;
304 return (error);
305 }
306 return (0);
307 }
308
309 /*
310 * ext2_remove(struct vnode *a_dvp, struct vnode *a_vp,
311 * struct componentname *a_cnp)
312 */
313 static int
314 ext2_remove(struct vop_old_remove_args *ap)
315 {
316 struct inode *ip;
317 struct vnode *vp = ap->a_vp;
318 struct vnode *dvp = ap->a_dvp;
319 int error;
320
321 ip = VTOI(vp);
322 if ((ip->i_flags & (NOUNLINK | IMMUTABLE | APPEND)) ||
323 (VTOI(dvp)->i_flags & APPEND)) {
324 error = EPERM;
325 goto out;
326 }
327 error = ext2_dirremove(dvp, ap->a_cnp);
328 if (error == 0) {
329 ip->i_nlink--;
330 ip->i_flag |= IN_CHANGE;
331 }
332 out:
333 return (error);
334 }
335
336 /*
337 * link vnode call
338 *
339 * ext2_link(struct vnode *a_tdvp, struct vnode *a_vp,
340 * struct componentname *a_cnp)
341 */
342 static int
343 ext2_link(struct vop_old_link_args *ap)
344 {
345 struct vnode *vp = ap->a_vp;
346 struct vnode *tdvp = ap->a_tdvp;
347 struct componentname *cnp = ap->a_cnp;
348 struct inode *ip;
349 int error;
350
351 if (tdvp->v_mount != vp->v_mount) {
352 error = EXDEV;
353 goto out2;
354 }
355 if (tdvp != vp) {
356 error = vn_lock(vp, LK_EXCLUSIVE | LK_FAILRECLAIM);
357 if (error)
358 goto out2;
359 }
360 ip = VTOI(vp);
361 if ((nlink_t)ip->i_nlink >= LINK_MAX) {
362 error = EMLINK;
363 goto out1;
364 }
365 if (ip->i_flags & (IMMUTABLE | APPEND)) {
366 error = EPERM;
367 goto out1;
368 }
369 ip->i_nlink++;
370 ip->i_flag |= IN_CHANGE;
371 error = EXT2_UPDATE(vp, 1);
372 if (!error)
373 error = ext2_direnter(ip, tdvp, cnp);
374 if (error) {
375 ip->i_nlink--;
376 ip->i_flag |= IN_CHANGE;
377 }
378 out1:
379 if (tdvp != vp)
380 vn_unlock(vp);
381 out2:
382 return (error);
383 }
384
385 /*
386 * Rename system call. fdvp, fvp are ref'd. tvp, tdvp are ref'd and locked.
387 * all vp's are released and must be in an unlocked state on return.
388 *
389 * ext2_rename(struct vnode *a_fdvp, struct vnode *a_fvp,
390 * struct componentname *a_fcnp, struct vnode *a_tdvp,
391 * struct vnode *a_tvp, struct componentname *a_tcnp)
392 */
393 static int
394 ext2_rename(struct vop_old_rename_args *ap)
395 {
396 struct vnode *tvp = ap->a_tvp;
397 struct vnode *tdvp = ap->a_tdvp;
398 struct vnode *fvp = ap->a_fvp;
399 struct vnode *fdvp = ap->a_fdvp;
400 struct componentname *tcnp = ap->a_tcnp;
401 struct componentname *fcnp = ap->a_fcnp;
402 struct inode *ip, *xp, *dp;
403 struct dirtemplate dirbuf;
404 int doingdirectory = 0, oldparent = 0, newparent = 0;
405 int error = 0;
406 u_char namlen;
407
408 /*
409 * Check for cross-device rename.
410 */
411 if ((fvp->v_mount != tdvp->v_mount) ||
412 (tvp && (fvp->v_mount != tvp->v_mount)) ||
413 tvp == tdvp) {
414 error = EXDEV;
415 abortit:
416 if (tdvp == tvp)
417 vrele(tdvp);
418 else
419 vput(tdvp);
420 if (tvp)
421 vput(tvp);
422 vrele(fdvp);
423 vrele(fvp);
424 return (error);
425 }
426
427 if (tvp && ((VTOI(tvp)->i_flags & (NOUNLINK | IMMUTABLE | APPEND)) ||
428 (VTOI(tdvp)->i_flags & APPEND))) {
429 error = EPERM;
430 goto abortit;
431 }
432
433 /*
434 * Renaming a file to itself has no effect. The upper layers should
435 * not call us in that case. Temporarily just warn if they do.
436 */
437 if (fvp == tvp) {
438 error = 0;
439 goto abortit;
440 }
441
442 error = vn_lock(fvp, LK_EXCLUSIVE | LK_FAILRECLAIM);
443 if (error)
444 goto abortit;
445
446 /*
447 * fvp, tvp, tdvp locked. fdvp not locked but note that fdvp may
448 * be equal to tdvp.
449 */
450 dp = VTOI(fdvp);
451 ip = VTOI(fvp);
452 if (ip->i_nlink >= LINK_MAX) {
453 vn_unlock(fvp);
454 error = EMLINK;
455 goto abortit;
456 }
457 if ((ip->i_flags & (NOUNLINK | IMMUTABLE | APPEND))
458 || (dp->i_flags & APPEND)) {
459 vn_unlock(fvp);
460 error = EPERM;
461 goto abortit;
462 }
463 if ((ip->i_mode & IFMT) == IFDIR) {
464 /*
465 * Avoid ".", "..", and aliases of "." for obvious reasons.
466 */
467 if ((fcnp->cn_namelen == 1 && fcnp->cn_nameptr[0] == '.') ||
468 dp == ip || (fcnp->cn_flags | tcnp->cn_flags) & CNP_ISDOTDOT ||
469 (ip->i_flag & IN_RENAME)) {
470 vn_unlock(fvp);
471 error = EINVAL;
472 goto abortit;
473 }
474 ip->i_flag |= IN_RENAME;
475 oldparent = dp->i_number;
476 doingdirectory++;
477 }
478
479 /*
480 * tvp is non-NULL if the target exists. fvp is still locked but
481 * we will unlock it soon. The 'bad' goto target requires dp and
482 * xp to be correctly assigned.
483 */
484 dp = VTOI(tdvp);
485 if (tvp)
486 xp = VTOI(tvp);
487 else
488 xp = NULL;
489
490 /*
491 * 1) Bump link count while we're moving stuff
492 * around. If we crash somewhere before
493 * completing our work, the link count
494 * may be wrong, but correctable.
495 */
496 ip->i_nlink++;
497 ip->i_flag |= IN_CHANGE;
498 if ((error = EXT2_UPDATE(fvp, 1)) != 0) {
499 vn_unlock(fvp);
500 goto bad;
501 }
502
503 /*
504 * If ".." must be changed (ie the directory gets a new
505 * parent) then the source directory must not be in the
506 * directory heirarchy above the target, as this would
507 * orphan everything below the source directory. Also
508 * the user must have write permission in the source so
509 * as to be able to change "..". We must repeat the call
510 * to namei, as the parent directory is unlocked by the
511 * call to checkpath().
512 */
513 error = VOP_EACCESS(fvp, VWRITE, tcnp->cn_cred);
514 vn_unlock(fvp);
515
516 /*
517 * tvp (if not NULL) and tdvp are locked. fvp and fdvp are not.
518 * dp and xp are set according to tdvp and tvp.
519 */
520 if (oldparent != dp->i_number)
521 newparent = dp->i_number;
522 if (doingdirectory && newparent) {
523 if (error) /* write access check above */
524 goto bad;
525
526 /*
527 * Prepare for relookup, get rid of xp
528 */
529 if (xp != NULL) {
530 vput(tvp);
531 xp = NULL;
532 }
533
534 /*
535 * checkpath vput()'s tdvp (VTOI(dp)) on return no matter what,
536 * get an extra ref so we wind up with just an unlocked, ref'd
537 * tdvp. The 'out' target skips xp and tdvp cleanups. Our
538 * tdvp is now unlocked so we have to clean it up ourselves.
539 */
540 vref(tdvp);
541 error = ext2_checkpath(ip, dp, tcnp->cn_cred);
542 tcnp->cn_flags |= CNP_PDIRUNLOCK;
543 if (error) {
544 vrele(tdvp);
545 goto out;
546 }
547 /*
548 * relookup no longer messes with the ref count. An unlocked
549 * tdvp must be passed and if no error occurs a locked tdvp
550 * will be returned. We have to use the out target again.
551 */
552 error = relookup(tdvp, &tvp, tcnp);
553 if (error) {
554 if (tcnp->cn_flags & CNP_PDIRUNLOCK)
555 vrele(tdvp);
556 else
557 vput(tdvp);
558 goto out;
559 }
560
561 /*
562 * tdvp is locked at this point. in the RENAME case tvp may
563 * be NULL without an error, assign xp accordingly. The
564 * 'bad' target can be used again after this.
565 */
566 dp = VTOI(tdvp);
567 if (tvp)
568 xp = VTOI(tvp);
569 }
570 /*
571 * 2) If target doesn't exist, link the target
572 * to the source and unlink the source.
573 * Otherwise, rewrite the target directory
574 * entry to reference the source inode and
575 * expunge the original entry's existence.
576 *
577 * tdvp and tvp are cleaned up by this code. tvp is only good if
578 * xp is not NULL.
579 */
580 if (xp == NULL) {
581 if (dp->i_dev != ip->i_dev)
582 panic("ext2_rename: EXDEV");
583 /*
584 * Account for ".." in new directory.
585 * When source and destination have the same
586 * parent we don't fool with the link count.
587 */
588 if (doingdirectory && newparent) {
589 if ((nlink_t)dp->i_nlink >= LINK_MAX) {
590 error = EMLINK;
591 goto bad;
592 }
593 dp->i_nlink++;
594 dp->i_flag |= IN_CHANGE;
595 error = EXT2_UPDATE(tdvp, 1);
596 if (error)
597 goto bad;
598 }
599 error = ext2_direnter(ip, tdvp, tcnp);
600 if (error) {
601 if (doingdirectory && newparent) {
602 dp->i_nlink--;
603 dp->i_flag |= IN_CHANGE;
604 EXT2_UPDATE(tdvp, 1);
605 }
606 goto bad;
607 }
608
609 /*
610 * manual cleanup, we can't use the bad or out target after
611 * this.
612 */
613 vput(tdvp);
614 } else {
615 if (xp->i_dev != dp->i_dev || xp->i_dev != ip->i_dev)
616 panic("ext2_rename: EXDEV");
617 /*
618 * Short circuit rename(foo, foo).
619 */
620 if (xp->i_number == ip->i_number)
621 panic("ext2_rename: same file");
622 /*
623 * If the parent directory is "sticky", then the user must
624 * own the parent directory, or the destination of the rename,
625 * otherwise the destination may not be changed (except by
626 * root). This implements append-only directories.
627 */
628 if ((dp->i_mode & S_ISTXT) && tcnp->cn_cred->cr_uid != 0 &&
629 tcnp->cn_cred->cr_uid != dp->i_uid &&
630 xp->i_uid != tcnp->cn_cred->cr_uid) {
631 error = EPERM;
632 goto bad;
633 }
634 /*
635 * Target must be empty if a directory and have no links
636 * to it. Also, ensure source and target are compatible
637 * (both directories, or both not directories).
638 */
639 if ((xp->i_mode&IFMT) == IFDIR) {
640 if (! ext2_dirempty(xp, dp->i_number, tcnp->cn_cred) ||
641 xp->i_nlink > 2) {
642 error = ENOTEMPTY;
643 goto bad;
644 }
645 if (!doingdirectory) {
646 error = ENOTDIR;
647 goto bad;
648 }
649 } else if (doingdirectory) {
650 error = EISDIR;
651 goto bad;
652 }
653 error = ext2_dirrewrite(dp, ip, tcnp);
654 if (error)
655 goto bad;
656 /*
657 * If the target directory is in the same
658 * directory as the source directory,
659 * decrement the link count on the parent
660 * of the target directory.
661 */
662 if (doingdirectory && !newparent) {
663 dp->i_nlink--;
664 dp->i_flag |= IN_CHANGE;
665 }
666
667 /*
668 * manual cleanup, we can't use the bad or out target after
669 * this.
670 */
671 vput(tdvp);
672
673 /*
674 * Adjust the link count of the target to
675 * reflect the dirrewrite above. If this is
676 * a directory it is empty and there are
677 * no links to it, so we can squash the inode and
678 * any space associated with it. We disallowed
679 * renaming over top of a directory with links to
680 * it above, as the remaining link would point to
681 * a directory without "." or ".." entries.
682 */
683 xp->i_nlink--;
684 if (doingdirectory) {
685 if (--xp->i_nlink != 0)
686 panic("ext2_rename: linked directory");
687 error = EXT2_TRUNCATE(tvp, (off_t)0, IO_SYNC,
688 tcnp->cn_cred);
689 }
690 xp->i_flag |= IN_CHANGE;
691 vput(tvp);
692 xp = NULL;
693 }
694
695 /*
696 * tvp and tdvp have been cleaned up. The bad and out targets may
697 * not be used. fvp and fdvp are ref'd but not locked. ip
698 * still represents the old fvp and ip->i_flag may still have IN_RENAME
699 * set (if doingdirectory).
700 */
701
702 /*
703 * 3) Unlink the source.
704 *
705 * fdvp is locked and ref'd. ap->a_fvp holds the old lookup unlocked
706 * and ref'd, fvp will hold the new lookup locked and ref'd.
707 *
708 * After the relookup ap->a_fvp must be released as part of our
709 * cleanup, not just fdvp and fvp. And, on success, fdvp and
710 * fvp will be locked so the bad and out targets cannot be used.
711 */
712 fcnp->cn_flags &= ~CNP_MODMASK;
713 fcnp->cn_flags |= CNP_LOCKPARENT;
714 KKASSERT(fcnp->cn_flags & CNP_PDIRUNLOCK);
715 error = relookup(fdvp, &fvp, fcnp);
716 if (error) {
717 /*
718 * From name has disappeared.
719 */
720 if (doingdirectory)
721 panic("ext2_rename: lost dir entry");
722 /* ip->i_flag only sets IN_RENAME if doingdirectory */
723 vrele(ap->a_fvp);
724 if (fcnp->cn_flags & CNP_PDIRUNLOCK)
725 vrele(fdvp);
726 else
727 vput(fdvp);
728 return (0);
729 }
730 KKASSERT((fcnp->cn_flags & CNP_PDIRUNLOCK) == 0);
731
732 /*
733 * This case shouldn't occur
734 */
735 if (fvp == NULL) {
736 /*
737 * From name has disappeared.
738 */
739 if (doingdirectory)
740 panic("ext2_rename: lost dir entry");
741 /* ip->i_flag only sets IN_RENAME if doingdirectory */
742 vrele(ap->a_fvp);
743 vput(fvp);
744 vput(fdvp);
745 return (0);
746 }
747
748 /*
749 * fvp and fdvp are both ref'd and locked.
750 */
751 xp = VTOI(fvp);
752 dp = VTOI(fdvp);
753
754 /*
755 * Ensure that the directory entry still exists and has not
756 * changed while the new name has been entered. If the source is
757 * a file then the entry may have been unlinked or renamed. In
758 * either case there is no further work to be done. If the source
759 * is a directory then it cannot have been rmdir'ed; its link
760 * count of three would cause a rmdir to fail with ENOTEMPTY.
761 * The IN_RENAME flag ensures that it cannot be moved by another
762 * rename.
763 */
764 if (xp != ip) {
765 if (doingdirectory)
766 panic("ext2_rename: lost dir entry");
767 /* ip->i_flag only sets IN_RENAME if doingdirectory */
768 } else {
769 /*
770 * If the source is a directory with a
771 * new parent, the link count of the old
772 * parent directory must be decremented
773 * and ".." set to point to the new parent.
774 */
775 if (doingdirectory && newparent) {
776 dp->i_nlink--;
777 dp->i_flag |= IN_CHANGE;
778 error = vn_rdwr(UIO_READ, fvp, (caddr_t)&dirbuf,
779 sizeof (struct dirtemplate), (off_t)0,
780 UIO_SYSSPACE, IO_NODELOCKED,
781 tcnp->cn_cred, NULL);
782 if (error == 0) {
783 /* Like ext2 little-endian: */
784 namlen = dirbuf.dotdot_type;
785 if (namlen != 2 ||
786 dirbuf.dotdot_name[0] != '.' ||
787 dirbuf.dotdot_name[1] != '.') {
788 ext2_dirbad(xp, (doff_t)12,
789 "rename: mangled dir");
790 } else {
791 dirbuf.dotdot_ino = newparent;
792 vn_rdwr(UIO_WRITE, fvp,
793 (caddr_t)&dirbuf,
794 sizeof (struct dirtemplate),
795 (off_t)0, UIO_SYSSPACE,
796 IO_NODELOCKED|IO_SYNC,
797 tcnp->cn_cred, NULL);
798 }
799 }
800 }
801 error = ext2_dirremove(fdvp, fcnp);
802 if (!error) {
803 xp->i_nlink--;
804 xp->i_flag |= IN_CHANGE;
805 }
806 xp->i_flag &= ~IN_RENAME;
807 }
808 vput(fdvp);
809 vput(fvp);
810 vrele(ap->a_fvp);
811 return (error);
812
813 bad:
814 if (xp)
815 vput(ITOV(xp));
816 if (dp)
817 vput(ITOV(dp));
818 out:
819 if (doingdirectory)
820 ip->i_flag &= ~IN_RENAME;
821
822 error = vn_lock(fvp, LK_EXCLUSIVE);
823 if (error == 0) {
824 ip->i_nlink--;
825 ip->i_flag |= IN_CHANGE;
826 ip->i_flag &= ~IN_RENAME;
827 vput(fvp);
828 } else {
829 vrele(fvp);
830 }
831 return (error);
832 }
833
834 /*
835 * Mkdir system call
836 *
837 * ext2_mkdir(struct vnode *a_dvp, struct vnode **a_vpp,
838 * struct componentname *a_cnp, struct vattr *a_vap)
839 */
840 static int
841 ext2_mkdir(struct vop_old_mkdir_args *ap)
842 {
843 struct vnode *dvp = ap->a_dvp;
844 struct vattr *vap = ap->a_vap;
845 struct componentname *cnp = ap->a_cnp;
846 struct inode *ip, *dp;
847 struct vnode *tvp;
848 struct dirtemplate dirtemplate, *dtp;
849 int error, dmode;
850
851 dp = VTOI(dvp);
852 if ((nlink_t)dp->i_nlink >= LINK_MAX) {
853 error = EMLINK;
854 goto out;
855 }
856 dmode = vap->va_mode & 0777;
857 dmode |= IFDIR;
858 /*
859 * Must simulate part of ext2_makeinode here to acquire the inode,
860 * but not have it entered in the parent directory. The entry is
861 * made later after writing "." and ".." entries.
862 */
863 error = EXT2_VALLOC(dvp, dmode, cnp->cn_cred, &tvp);
864 if (error)
865 goto out;
866 ip = VTOI(tvp);
867 ip->i_gid = dp->i_gid;
868 #ifdef SUIDDIR
869 {
870 #ifdef QUOTA
871 struct ucred ucred, *ucp;
872 ucp = cnp->cn_cred;
873 #endif
874 /*
875 * if we are hacking owners here, (only do this where told to)
876 * and we are not giving it TOO root, (would subvert quotas)
877 * then go ahead and give it to the other user.
878 * The new directory also inherits the SUID bit.
879 * If user's UID and dir UID are the same,
880 * 'give it away' so that the SUID is still forced on.
881 */
882 if ( (dvp->v_mount->mnt_flag & MNT_SUIDDIR) &&
883 (dp->i_mode & ISUID) && dp->i_uid) {
884 dmode |= ISUID;
885 ip->i_uid = dp->i_uid;
886 #ifdef QUOTA
887 if (dp->i_uid != cnp->cn_cred->cr_uid) {
888 /*
889 * make sure the correct user gets charged
890 * for the space.
891 * Make a dummy credential for the victim.
892 * XXX This seems to never be accessed out of
893 * our context so a stack variable is ok.
894 */
895 ucred.cr_ref = 1;
896 ucred.cr_uid = ip->i_uid;
897 ucred.cr_ngroups = 1;
898 ucred.cr_groups[0] = dp->i_gid;
899 ucp = &ucred;
900 }
901 #endif
902 } else {
903 ip->i_uid = cnp->cn_cred->cr_uid;
904 }
905 #ifdef QUOTA
906 if ((error = ext2_getinoquota(ip)) ||
907 (error = ext2_chkiq(ip, 1, ucp, 0))) {
908 EXT2_VFREE(tvp, ip->i_number, dmode);
909 vput(tvp);
910 return (error);
911 }
912 #endif
913 }
914 #else
915 ip->i_uid = cnp->cn_cred->cr_uid;
916 #ifdef QUOTA
917 if ((error = ext2_getinoquota(ip)) ||
918 (error = ext2_chkiq(ip, 1, cnp->cn_cred, 0))) {
919 EXT2_VFREE(tvp, ip->i_number, dmode);
920 vput(tvp);
921 return (error);
922 }
923 #endif
924 #endif
925 ip->i_flag |= IN_ACCESS | IN_CHANGE | IN_UPDATE;
926 ip->i_mode = dmode;
927 tvp->v_type = VDIR; /* Rest init'd in getnewvnode(). */
928 ip->i_nlink = 2;
929 if (cnp->cn_flags & CNP_ISWHITEOUT)
930 ip->i_flags |= UF_OPAQUE;
931 error = EXT2_UPDATE(tvp, 1);
932
933 /*
934 * The vnode must have a VM object in order to issue buffer cache
935 * ops on it.
936 */
937 vinitvmio(tvp, 0, PAGE_SIZE, -1);
938
939 /*
940 * Bump link count in parent directory
941 * to reflect work done below. Should
942 * be done before reference is created
943 * so reparation is possible if we crash.
944 */
945 dp->i_nlink++;
946 dp->i_flag |= IN_CHANGE;
947 error = EXT2_UPDATE(dvp, 1);
948 if (error)
949 goto bad;
950
951 /* Initialize directory with "." and ".." from static template. */
952 if (EXT2_HAS_INCOMPAT_FEATURE(ip->i_e2fs->s_es,
953 EXT2_FEATURE_INCOMPAT_FILETYPE))
954 dtp = &ext2_mastertemplate;
955 else
956 dtp = &ext2_omastertemplate;
957 dirtemplate = *dtp;
958 dirtemplate.dot_ino = ip->i_number;
959 dirtemplate.dotdot_ino = dp->i_number;
960 /* note that in ext2 DIRBLKSIZ == blocksize, not DEV_BSIZE
961 * so let's just redefine it - for this function only
962 */
963 #undef DIRBLKSIZ
964 #define DIRBLKSIZ VTOI(dvp)->i_e2fs->s_blocksize
965 dirtemplate.dotdot_reclen = DIRBLKSIZ - 12;
966 error = vn_rdwr(UIO_WRITE, tvp, (caddr_t)&dirtemplate,
967 sizeof (dirtemplate), (off_t)0, UIO_SYSSPACE,
968 IO_NODELOCKED|IO_SYNC, cnp->cn_cred, NULL);
969 if (error) {
970 dp->i_nlink--;
971 dp->i_flag |= IN_CHANGE;
972 goto bad;
973 }
974 if (DIRBLKSIZ > VFSTOEXT2(dvp->v_mount)->um_mountp->mnt_stat.f_bsize)
975 panic("ext2_mkdir: blksize"); /* XXX should grow with balloc() */
976 else {
977 ip->i_size = DIRBLKSIZ;
978 ip->i_flag |= IN_CHANGE;
979 }
980
981 /* Directory set up, now install its entry in the parent directory. */
982 error = ext2_direnter(ip, dvp, cnp);
983 if (error) {
984 dp->i_nlink--;
985 dp->i_flag |= IN_CHANGE;
986 }
987 bad:
988 /*
989 * No need to do an explicit VOP_TRUNCATE here, vrele will do this
990 * for us because we set the link count to 0.
991 */
992 if (error) {
993 ip->i_nlink = 0;
994 ip->i_flag |= IN_CHANGE;
995 vput(tvp);
996 } else
997 *ap->a_vpp = tvp;
998 out:
999 return (error);
1000 #undef DIRBLKSIZ
1001 #define DIRBLKSIZ DEV_BSIZE
1002 }
1003
1004 /*
1005 * Rmdir system call.
1006 *
1007 * ext2_rmdir(struct vnode *a_dvp, struct vnode *a_vp,
1008 * struct componentname *a_cnp)
1009 */
1010 static int
1011 ext2_rmdir(struct vop_old_rmdir_args *ap)
1012 {
1013 struct vnode *vp = ap->a_vp;
1014 struct vnode *dvp = ap->a_dvp;
1015 struct componentname *cnp = ap->a_cnp;
1016 struct inode *ip, *dp;
1017 int error;
1018
1019 ip = VTOI(vp);
1020 dp = VTOI(dvp);
1021
1022 /*
1023 * Verify the directory is empty (and valid).
1024 * (Rmdir ".." won't be valid since
1025 * ".." will contain a reference to
1026 * the current directory and thus be
1027 * non-empty.)
1028 */
1029 error = 0;
1030 if (ip->i_nlink != 2 || !ext2_dirempty(ip, dp->i_number, cnp->cn_cred)) {
1031 error = ENOTEMPTY;
1032 goto out;
1033 }
1034 if ((dp->i_flags & APPEND)
1035 || (ip->i_flags & (NOUNLINK | IMMUTABLE | APPEND))) {
1036 error = EPERM;
1037 goto out;
1038 }
1039 /*
1040 * Delete reference to directory before purging
1041 * inode. If we crash in between, the directory
1042 * will be reattached to lost+found,
1043 */
1044 error = ext2_dirremove(dvp, cnp);
1045 if (error)
1046 goto out;
1047 dp->i_nlink--;
1048 dp->i_flag |= IN_CHANGE;
1049 vn_unlock(dvp);
1050 /*
1051 * Truncate inode. The only stuff left
1052 * in the directory is "." and "..". The
1053 * "." reference is inconsequential since
1054 * we're quashing it. The ".." reference
1055 * has already been adjusted above. We've
1056 * removed the "." reference and the reference
1057 * in the parent directory, but there may be
1058 * other hard links so decrement by 2 and
1059 * worry about them later.
1060 */
1061 ip->i_nlink -= 2;
1062 error = EXT2_TRUNCATE(vp, (off_t)0, IO_SYNC, cnp->cn_cred);
1063 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY);
1064 out:
1065 return (error);
1066 }
1067
1068 /*
1069 * symlink -- make a symbolic link
1070 *
1071 * ext2_symlink(struct vnode *a_dvp, struct vnode **a_vpp,
1072 * struct componentname *a_cnp, struct vattr *a_vap,
1073 * char *a_target)
1074 */
1075 static int
1076 ext2_symlink(struct vop_old_symlink_args *ap)
1077 {
1078 struct vnode *vp, **vpp = ap->a_vpp;
1079 struct inode *ip;
1080 int len, error;
1081
1082 error = ext2_makeinode(IFLNK | ap->a_vap->va_mode, ap->a_dvp,
1083 vpp, ap->a_cnp);
1084 if (error)
1085 return (error);
1086 vp = *vpp;
1087 len = strlen(ap->a_target);
1088 if (len < vp->v_mount->mnt_maxsymlinklen) {
1089 ip = VTOI(vp);
1090 bcopy(ap->a_target, (char *)ip->i_shortlink, len);
1091 ip->i_size = len;
1092 ip->i_flag |= IN_CHANGE | IN_UPDATE;
1093 } else {
1094 /*
1095 * Make sure we have a VM object in order to use
1096 * the buffer cache.
1097 */
1098 if (vp->v_object == NULL)
1099 vinitvmio(vp, 0, PAGE_SIZE, -1);
1100
1101 error = vn_rdwr(UIO_WRITE, vp, ap->a_target, len, (off_t)0,
1102 UIO_SYSSPACE, IO_NODELOCKED,
1103 ap->a_cnp->cn_cred, NULL);
1104
1105 if (error)
1106 vput(vp);
1107 }
1108
1109 return (error);
1110 }
1111
1112 /*
1113 * Allocate a new inode.
1114 */
1115 static int
1116 ext2_makeinode(int mode, struct vnode *dvp, struct vnode **vpp,
1117 struct componentname *cnp)
1118 {
1119 struct inode *ip, *pdir;
1120 struct vnode *tvp;
1121 int error;
1122
1123 pdir = VTOI(dvp);
1124 *vpp = NULL;
1125 if ((mode & IFMT) == 0)
1126 mode |= IFREG;
1127
1128 error = EXT2_VALLOC(dvp, mode, cnp->cn_cred, &tvp);
1129 if (error) {
1130 return (error);
1131 }
1132 ip = VTOI(tvp);
1133 ip->i_gid = pdir->i_gid;
1134 #ifdef SUIDDIR
1135 {
1136 #ifdef QUOTA
1137 struct ucred ucred, *ucp;
1138 ucp = cnp->cn_cred;
1139 #endif
1140 /*
1141 * if we are
1142 * not the owner of the directory,
1143 * and we are hacking owners here, (only do this where told to)
1144 * and we are not giving it TOO root, (would subvert quotas)
1145 * then go ahead and give it to the other user.
1146 * Note that this drops off the execute bits for security.
1147 */
1148 if ( (dvp->v_mount->mnt_flag & MNT_SUIDDIR) &&
1149 (pdir->i_mode & ISUID) &&
1150 (pdir->i_uid != cnp->cn_cred->cr_uid) && pdir->i_uid) {
1151 ip->i_uid = pdir->i_uid;
1152 mode &= ~07111;
1153 #ifdef QUOTA
1154 /*
1155 * make sure the correct user gets charged
1156 * for the space.
1157 * Quickly knock up a dummy credential for the victim.
1158 * XXX This seems to never be accessed out of our
1159 * context so a stack variable is ok.
1160 */
1161 ucred.cr_ref = 1;
1162 ucred.cr_uid = ip->i_uid;
1163 ucred.cr_ngroups = 1;
1164 ucred.cr_groups[0] = pdir->i_gid;
1165 ucp = &ucred;
1166 #endif
1167 } else {
1168 ip->i_uid = cnp->cn_cred->cr_uid;
1169 }
1170
1171 #ifdef QUOTA
1172 if ((error = ext2_getinoquota(ip)) ||
1173 (error = ext2_chkiq(ip, 1, ucp, 0))) {
1174 EXT2_VFREE(tvp, ip->i_number, mode);
1175 vput(tvp);
1176 return (error);
1177 }
1178 #endif
1179 }
1180 #else
1181 ip->i_uid = cnp->cn_cred->cr_uid;
1182 #ifdef QUOTA
1183 if ((error = ext2_getinoquota(ip)) ||
1184 (error = ext2_chkiq(ip, 1, cnp->cn_cred, 0))) {
1185 EXT2_VFREE(tvp, ip->i_number, mode);
1186 vput(tvp);
1187 return (error);
1188 }
1189 #endif
1190 #endif
1191 ip->i_flag |= IN_ACCESS | IN_CHANGE | IN_UPDATE;
1192 ip->i_mode = mode;
1193 tvp->v_type = IFTOVT(mode); /* Rest init'd in getnewvnode(). */
1194 ip->i_nlink = 1;
1195 if ((ip->i_mode & ISGID) && !groupmember(ip->i_gid, cnp->cn_cred) &&
1196 priv_check_cred(cnp->cn_cred, PRIV_VFS_SETGID, 0))
1197 ip->i_mode &= ~ISGID;
1198
1199 if (cnp->cn_flags & CNP_ISWHITEOUT)
1200 ip->i_flags |= UF_OPAQUE;
1201
1202 /*
1203 * Regular files and directories need VM objects. Softlinks do
1204 * not (not immediately anyway).
1205 */
1206 if (tvp->v_type == VREG || tvp->v_type == VDIR)
1207 vinitvmio(tvp, 0, PAGE_SIZE, -1);
1208
1209 /*
1210 * Make sure inode goes to disk before directory entry.
1211 */
1212 error = EXT2_UPDATE(tvp, 1);
1213 if (error)
1214 goto bad;
1215 error = ext2_direnter(ip, dvp, cnp);
1216 if (error)
1217 goto bad;
1218
1219 *vpp = tvp;
1220 return (0);
1221
1222 bad:
1223 /*
1224 * Write error occurred trying to update the inode
1225 * or the directory so must deallocate the inode.
1226 */
1227 ip->i_nlink = 0;
1228 ip->i_flag |= IN_CHANGE;
1229 vput(tvp);
1230 return (error);
1231 }
1232
1233 void
1234 ext2_itimes(struct vnode *vp)
1235 {
1236 struct inode *ip;
1237 struct timespec ts;
1238
1239 ip = VTOI(vp);
1240 if ((ip->i_flag & (IN_ACCESS | IN_CHANGE | IN_UPDATE)) == 0)
1241 return;
1242 if ((vp->v_type == VBLK || vp->v_type == VCHR) && !DOINGSOFTDEP(vp))
1243 ip->i_flag |= IN_LAZYMOD;
1244 else
1245 ip->i_flag |= IN_MODIFIED;
1246 if ((vp->v_mount->mnt_flag & MNT_RDONLY) == 0) {
1247 vfs_timestamp(&ts);
1248 if (ip->i_flag & IN_ACCESS) {
1249 ip->i_atime = ts.tv_sec;
1250 ip->i_atimensec = ts.tv_nsec;
1251 }
1252 if (ip->i_flag & IN_UPDATE) {
1253 ip->i_mtime = ts.tv_sec;
1254 ip->i_mtimensec = ts.tv_nsec;
1255 ip->i_modrev++;
1256 }
1257 if (ip->i_flag & IN_CHANGE) {
1258 ip->i_ctime = ts.tv_sec;
1259 ip->i_ctimensec = ts.tv_nsec;
1260 }
1261 }
1262 ip->i_flag &= ~(IN_ACCESS | IN_CHANGE | IN_UPDATE);
1263 }
1264
1265 /*
1266 * Open called.
1267 *
1268 * Nothing to do.
1269 *
1270 * ext2_open(struct vnode *a_vp, int a_mode, struct ucred *a_cred,
1271 * struct file *a_fp)
1272 */
1273 /* ARGSUSED */
1274 static
1275 int
1276 ext2_open(struct vop_open_args *ap)
1277 {
1278 struct vnode *vp = ap->a_vp;
1279
1280 /*
1281 * Files marked append-only must be opened for appending.
1282 */
1283 if ((VTOI(vp)->i_flags & APPEND) &&
1284 (ap->a_mode & (FWRITE | O_APPEND)) == FWRITE) {
1285 return (EPERM);
1286 }
1287 return (vop_stdopen(ap));
1288 }
1289
1290 /*
1291 * Close called.
1292 *
1293 * Update the times on the inode.
1294 *
1295 * ext2_close(struct vnode *a_vp, int a_fflag, struct ucred *a_cred)
1296 */
1297 /* ARGSUSED */
1298 static
1299 int
1300 ext2_close(struct vop_close_args *ap)
1301 {
1302 struct vnode *vp = ap->a_vp;
1303
1304 if (VREFCNT(vp) > 1)
1305 ext2_itimes(vp);
1306 return (vop_stdclose(ap));
1307 }
1308
1309 /*
1310 * ext2_access(struct vnode *a_vp, int a_mode, struct ucred *a_cred)
1311 */
1312 static
1313 int
1314 ext2_access(struct vop_access_args *ap)
1315 {
1316 struct vnode *vp = ap->a_vp;
1317 struct inode *ip = VTOI(vp);
1318 int error;
1319
1320 #ifdef QUOTA
1321 if (ap->a_mode & VWRITE) {
1322 switch (vp->v_type) {
1323 case VDIR:
1324 case VLNK:
1325 case VREG:
1326 if ((error = ext2_getinoquota(ip)) != 0)
1327 return (error);
1328 break;
1329 default:
1330 break;
1331 }
1332 }
1333 #endif
1334
1335 error = vop_helper_access(ap, ip->i_uid, ip->i_gid, ip->i_mode,
1336 ip->i_flags);
1337 return (error);
1338 }
1339
1340 /*
1341 * ext2_getattr(struct vnode *a_vp, struct vattr *a_vap)
1342 */
1343 /* ARGSUSED */
1344 static
1345 int
1346 ext2_getattr(struct vop_getattr_args *ap)
1347 {
1348 struct vnode *vp = ap->a_vp;
1349 struct inode *ip = VTOI(vp);
1350 struct vattr *vap = ap->a_vap;
1351
1352 ext2_itimes(vp);
1353 /*
1354 * Copy from inode table
1355 */
1356 vap->va_fsid = dev2udev(ip->i_dev);
1357 vap->va_fileid = ip->i_number;
1358 vap->va_mode = ip->i_mode & ~IFMT;
1359 vap->va_nlink = VFSTOEXT2(vp->v_mount)->um_i_effnlink_valid ?
1360 ip->i_effnlink : ip->i_nlink;
1361 vap->va_uid = ip->i_uid;
1362 vap->va_gid = ip->i_gid;
1363 vap->va_rmajor = umajor(ip->i_rdev);
1364 vap->va_rminor = uminor(ip->i_rdev);
1365 vap->va_size = ip->i_din.di_size;
1366 vap->va_atime.tv_sec = ip->i_atime;
1367 vap->va_atime.tv_nsec = ip->i_atimensec;
1368 vap->va_mtime.tv_sec = ip->i_mtime;
1369 vap->va_mtime.tv_nsec = ip->i_mtimensec;
1370 vap->va_ctime.tv_sec = ip->i_ctime;
1371 vap->va_ctime.tv_nsec = ip->i_ctimensec;
1372 vap->va_flags = ip->i_flags;
1373 vap->va_gen = ip->i_gen;
1374 vap->va_blocksize = vp->v_mount->mnt_stat.f_iosize;
1375 vap->va_bytes = dbtob((u_quad_t)ip->i_blocks);
1376 vap->va_type = IFTOVT(ip->i_mode);
1377 vap->va_filerev = ip->i_modrev;
1378 return (0);
1379 }
1380
1381 /*
1382 * Set attribute vnode op. called from several syscalls
1383 *
1384 * ext2_setattr(struct vnode *a_vp, struct vattr *a_vap, struct ucred *a_cred)
1385 */
1386 static
1387 int
1388 ext2_setattr(struct vop_setattr_args *ap)
1389 {
1390 struct vattr *vap = ap->a_vap;
1391 struct vnode *vp = ap->a_vp;
1392 struct inode *ip = VTOI(vp);
1393 struct ucred *cred = ap->a_cred;
1394 int error;
1395
1396 /*
1397 * Check for unsettable attributes.
1398 */
1399 if ((vap->va_type != VNON) || (vap->va_nlink != VNOVAL) ||
1400 (vap->va_fsid != VNOVAL) || (vap->va_fileid != VNOVAL) ||
1401 (vap->va_blocksize != VNOVAL) || (vap->va_rmajor != VNOVAL) ||
1402 ((int)vap->va_bytes != VNOVAL) || (vap->va_gen != VNOVAL)) {
1403 return (EINVAL);
1404 }
1405 if (vap->va_flags != VNOVAL) {
1406 if (vp->v_mount->mnt_flag & MNT_RDONLY)
1407 return (EROFS);
1408 if (cred->cr_uid != ip->i_uid &&
1409 (error = priv_check_cred(cred, PRIV_VFS_SETATTR, 0)))
1410 return (error);
1411 /*
1412 * Note that a root chflags becomes a user chflags when
1413 * we are jailed, unless the jail.chflags_allowed sysctl
1414 * is set.
1415 */
1416 if (cred->cr_uid == 0 &&
1417 (!jailed(cred) || jail_chflags_allowed)) {
1418 if ((ip->i_flags
1419 & (SF_NOUNLINK | SF_IMMUTABLE | SF_APPEND)) &&
1420 securelevel > 0)
1421 return (EPERM);
1422 ip->i_flags = vap->va_flags;
1423 } else {
1424 if (ip->i_flags
1425 & (SF_NOUNLINK | SF_IMMUTABLE | SF_APPEND) ||
1426 (vap->va_flags & UF_SETTABLE) != vap->va_flags)
1427 return (EPERM);
1428 ip->i_flags &= SF_SETTABLE;
1429 ip->i_flags |= (vap->va_flags & UF_SETTABLE);
1430 }
1431 ip->i_flag |= IN_CHANGE;
1432 if (vap->va_flags & (IMMUTABLE | APPEND))
1433 return (0);
1434 }
1435 if (ip->i_flags & (IMMUTABLE | APPEND))
1436 return (EPERM);
1437 /*
1438 * Go through the fields and update iff not VNOVAL.
1439 */
1440 if (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL) {
1441 if (vp->v_mount->mnt_flag & MNT_RDONLY)
1442 return (EROFS);
1443 if ((error = ext2_chown(vp, vap->va_uid, vap->va_gid, cred)) != 0)
1444 return (error);
1445 }
1446 if (vap->va_size != VNOVAL) {
1447 /*
1448 * Disallow write attempts on read-only filesystems;
1449 * unless the file is a socket, fifo, or a block or
1450 * character device resident on the filesystem.
1451 */
1452 switch (vp->v_type) {
1453 case VDIR:
1454 return (EISDIR);
1455 case VLNK:
1456 case VREG:
1457 if (vp->v_mount->mnt_flag & MNT_RDONLY)
1458 return (EROFS);
1459 break;
1460 default:
1461 break;
1462 }
1463 if ((error = EXT2_TRUNCATE(vp, vap->va_size, 0, cred)) != 0)
1464 return (error);
1465 }
1466 ip = VTOI(vp);
1467 if (vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL) {
1468 if (vp->v_mount->mnt_flag & MNT_RDONLY)
1469 return (EROFS);
1470 if (cred->cr_uid != ip->i_uid &&
1471 (error = priv_check_cred(cred, PRIV_VFS_SETATTR, 0)) &&
1472 ((vap->va_vaflags & VA_UTIMES_NULL) == 0 ||
1473 (error = VOP_EACCESS(vp, VWRITE, cred))))
1474 return (error);
1475 if (vap->va_atime.tv_sec != VNOVAL)
1476 ip->i_flag |= IN_ACCESS;
1477 if (vap->va_mtime.tv_sec != VNOVAL)
1478 ip->i_flag |= IN_CHANGE | IN_UPDATE;
1479 ext2_itimes(vp);
1480 if (vap->va_atime.tv_sec != VNOVAL) {
1481 ip->i_atime = vap->va_atime.tv_sec;
1482 ip->i_atimensec = vap->va_atime.tv_nsec;
1483 }
1484 if (vap->va_mtime.tv_sec != VNOVAL) {
1485 ip->i_mtime = vap->va_mtime.tv_sec;
1486 ip->i_mtimensec = vap->va_mtime.tv_nsec;
1487 }
1488 error = EXT2_UPDATE(vp, 0);
1489 if (error)
1490 return (error);
1491 }
1492 error = 0;
1493 if (vap->va_mode != (mode_t)VNOVAL) {
1494 if (vp->v_mount->mnt_flag & MNT_RDONLY)
1495 return (EROFS);
1496 error = ext2_chmod(vp, (int)vap->va_mode, cred);
1497 }
1498 VN_KNOTE(vp, NOTE_ATTRIB);
1499 return (error);
1500 }
1501
1502 /*
1503 * Change the mode on a file.
1504 * Inode must be locked before calling.
1505 */
1506 static int
1507 ext2_chmod(struct vnode *vp, int mode, struct ucred *cred)
1508 {
1509 struct inode *ip = VTOI(vp);
1510 int error;
1511
1512 if (cred->cr_uid != ip->i_uid) {
1513 error = priv_check_cred(cred, PRIV_VFS_CHMOD, 0);
1514 if (error)
1515 return (error);
1516 }
1517 if (cred->cr_uid) {
1518 if (vp->v_type != VDIR && (mode & S_ISTXT))
1519 return (EFTYPE);
1520 if (!groupmember(ip->i_gid, cred) && (mode & ISGID))
1521 return (EPERM);
1522 }
1523 ip->i_mode &= ~ALLPERMS;
1524 ip->i_mode |= (mode & ALLPERMS);
1525 ip->i_flag |= IN_CHANGE;
1526 return (0);
1527 }
1528
1529 /*
1530 * Perform chown operation on inode ip;
1531 * inode must be locked prior to call.
1532 */
1533 static int
1534 ext2_chown(struct vnode *vp, uid_t uid, gid_t gid, struct ucred *cred)
1535 {
1536 struct inode *ip = VTOI(vp);
1537 uid_t ouid;
1538 gid_t ogid;
1539 int error = 0;
1540 #ifdef QUOTA
1541 int i;
1542 long change;
1543 #endif
1544
1545 if (uid == (uid_t)VNOVAL)
1546 uid = ip->i_uid;
1547 if (gid == (gid_t)VNOVAL)
1548 gid = ip->i_gid;
1549 /*
1550 * If we don't own the file, are trying to change the owner
1551 * of the file, or are not a member of the target group,
1552 * the caller must be superuser or the call fails.
1553 */
1554 if ((cred->cr_uid != ip->i_uid || uid != ip->i_uid ||
1555 (gid != ip->i_gid && !(cred->cr_gid == gid ||
1556 groupmember(gid, cred)))) &&
1557 (error = priv_check_cred(cred, PRIV_VFS_CHOWN, 0)))
1558 return (error);
1559 ogid = ip->i_gid;
1560 ouid = ip->i_uid;
1561 #ifdef QUOTA
1562 if ((error = ext2_getinoquota(ip)) != 0)
1563 return (error);
1564 if (ouid == uid) {
1565 ext2_dqrele(vp, ip->i_dquot[USRQUOTA]);
1566 ip->i_dquot[USRQUOTA] = NODQUOT;
1567 }
1568 if (ogid == gid) {
1569 ext2_dqrele(vp, ip->i_dquot[GRPQUOTA]);
1570 ip->i_dquot[GRPQUOTA] = NODQUOT;
1571 }
1572 change = ip->i_blocks;
1573 (void) ext2_chkdq(ip, -change, cred, CHOWN);
1574 (void) ext2_chkiq(ip, -1, cred, CHOWN);
1575 for (i = 0; i < MAXQUOTAS; i++) {
1576 ext2_dqrele(vp, ip->i_dquot[i]);
1577 ip->i_dquot[i] = NODQUOT;
1578 }
1579 #endif
1580 ip->i_gid = gid;
1581 ip->i_uid = uid;
1582 #ifdef QUOTA
1583 if ((error = ext2_getinoquota(ip)) == 0) {
1584 if (ouid == uid) {
1585 ext2_dqrele(vp, ip->i_dquot[USRQUOTA]);
1586 ip->i_dquot[USRQUOTA] = NODQUOT;
1587 }
1588 if (ogid == gid) {
1589 ext2_dqrele(vp, ip->i_dquot[GRPQUOTA]);
1590 ip->i_dquot[GRPQUOTA] = NODQUOT;
1591 }
1592 if ((error = ext2_chkdq(ip, change, cred, CHOWN)) == 0) {
1593 if ((error = ext2_chkiq(ip, 1, cred, CHOWN)) == 0)
1594 goto good;
1595 else
1596 (void)ext2_chkdq(ip, -change, cred, CHOWN|FORCE);
1597 }
1598 for (i = 0; i < MAXQUOTAS; i++) {
1599 ext2_dqrele(vp, ip->i_dquot[i]);
1600 ip->i_dquot[i] = NODQUOT;
1601 }
1602 }
1603 ip->i_gid = ogid;
1604 ip->i_uid = ouid;
1605 if (ext2_getinoquota(ip) == 0) {
1606 if (ouid == uid) {
1607 ext2_dqrele(vp, ip->i_dquot[USRQUOTA]);
1608 ip->i_dquot[USRQUOTA] = NODQUOT;
1609 }
1610 if (ogid == gid) {
1611 ext2_dqrele(vp, ip->i_dquot[GRPQUOTA]);
1612 ip->i_dquot[GRPQUOTA] = NODQUOT;
1613 }
1614 (void) ext2_chkdq(ip, change, cred, FORCE|CHOWN);
1615 (void) ext2_chkiq(ip, 1, cred, FORCE|CHOWN);
1616 (void) ext2_getinoquota(ip);
1617 }
1618 return (error);
1619 good:
1620 if (ext2_getinoquota(ip))
1621 panic("ext2_chown: lost quota");
1622 #endif /* QUOTA */
1623 ip->i_flag |= IN_CHANGE;
1624 if (cred->cr_uid != 0 && (ouid != uid || ogid != gid))
1625 ip->i_mode &= ~(ISUID | ISGID);
1626 return (0);
1627 }
1628
1629 /*
1630 * Mmap a file
1631 *
1632 * NB Currently unsupported.
1633 *
1634 * ext2_mmap(struct vnode *a_vp, int a_fflags, struct ucred *a_cred)
1635 */
1636 /* ARGSUSED */
1637 static
1638 int
1639 ext2_mmap(struct vop_mmap_args *ap)
1640 {
1641 return (EINVAL);
1642 }
1643
1644 /*
1645 * whiteout vnode call
1646 *
1647 * ext2_whiteout(struct vnode *a_dvp, struct componentname *a_cnp, int a_flags)
1648 */
1649 static
1650 int
1651 ext2_whiteout(struct vop_old_whiteout_args *ap)
1652 {
1653 return (EOPNOTSUPP);
1654 }
1655
1656 /*
1657 * Return target name of a symbolic link
1658 *
1659 * ext2_readlink(struct vnode *a_vp, struct uio *a_uio, struct ucred *a_cred)
1660 */
1661 static
1662 int
1663 ext2_readlink(struct vop_readlink_args *ap)
1664 {
1665 struct vnode *vp = ap->a_vp;
1666 struct inode *ip = VTOI(vp);
1667 int isize;
1668
1669 isize = ip->i_size;
1670 if ((isize < vp->v_mount->mnt_maxsymlinklen) ||
1671 (ip->i_din.di_blocks == 0)) { /* XXX - for old fastlink support */
1672 uiomove((char *)ip->i_shortlink, isize, ap->a_uio);
1673 return (0);
1674 }
1675 return (VOP_READ(vp, ap->a_uio, 0, ap->a_cred));
1676 }
1677
1678 /*
1679 * Calculate the logical to physical mapping if not done already,
1680 * then call the device strategy routine.
1681 *
1682 * In order to be able to swap to a file, the VOP_BMAP operation may not
1683 * deadlock on memory. See ext2_bmap() for details.
1684 *
1685 * ext2_strategy(struct vnode *a_vp, struct bio *a_bio)
1686 */
1687 static
1688 int
1689 ext2_strategy(struct vop_strategy_args *ap)
1690 {
1691 struct bio *bio = ap->a_bio;
1692 struct bio *nbio;
1693 struct buf *bp = bio->bio_buf;
1694 struct vnode *vp = ap->a_vp;
1695 struct inode *ip;
1696 int error;
1697
1698 ip = VTOI(vp);
1699 if (vp->v_type == VBLK || vp->v_type == VCHR)
1700 panic("ext2_strategy: spec");
1701 nbio = push_bio(bio);
1702 if (nbio->bio_offset == NOOFFSET) {
1703 error = VOP_BMAP(vp, bio->bio_offset, &nbio->bio_offset,
1704 NULL, NULL, bp->b_cmd);
1705 if (error) {
1706 bp->b_error = error;
1707 bp->b_flags |= B_ERROR;
1708 /* I/O was never started on nbio, must biodone(bio) */
1709 biodone(bio);
1710 return (error);
1711 }
1712 if (nbio->bio_offset == NOOFFSET)
1713 vfs_bio_clrbuf(bp);
1714 }
1715 if (nbio->bio_offset == NOOFFSET) {
1716 /* I/O was never started on nbio, must biodone(bio) */
1717 biodone(bio);
1718 return (0);
1719 }
1720 vn_strategy(ip->i_devvp, nbio);
1721 return (0);
1722 }
1723
1724 /*
1725 * Print out the contents of an inode.
1726 *
1727 * ext2_print(struct vnode *a_vp)
1728 */
1729 static
1730 int
1731 ext2_print(struct vop_print_args *ap)
1732 {
1733 struct vnode *vp = ap->a_vp;
1734 struct inode *ip = VTOI(vp);
1735
1736 kprintf("tag VT_EXT2FS, ino %lu, on dev %s (%d, %d)",
1737 (u_long)ip->i_number, devtoname(ip->i_dev), major(ip->i_dev),
1738 minor(ip->i_dev));
1739 if (vp->v_type == VFIFO)
1740 fifo_printinfo(vp);
1741 lockmgr_printinfo(&vp->v_lock);
1742 kprintf("\n");
1743 return (0);
1744 }
1745
1746 /*
1747 * Read wrapper for fifos.
1748 *
1749 * ext2fifo_read(struct vnode *a_vp, struct uio *a_uio, int a_ioflag,
1750 * struct ucred *a_cred)
1751 */
1752 static
1753 int
1754 ext2fifo_read(struct vop_read_args *ap)
1755 {
1756 int error, resid;
1757 struct inode *ip;
1758 struct uio *uio;
1759
1760 uio = ap->a_uio;
1761 resid = uio->uio_resid;
1762 error = VOCALL(&fifo_vnode_vops, &ap->a_head);
1763 ip = VTOI(ap->a_vp);
1764 if ((ap->a_vp->v_mount->mnt_flag & MNT_NOATIME) == 0 && ip != NULL &&
1765 (uio->uio_resid != resid || (error == 0 && resid != 0)))
1766 VTOI(ap->a_vp)->i_flag |= IN_ACCESS;
1767 return (error);
1768 }
1769
1770 /*
1771 * Write wrapper for fifos.
1772 *
1773 * ext2fifo_write(struct vnode *a_vp, struct uio *a_uio, int a_ioflag,
1774 * struct ucred *a_cred)
1775 */
1776 static
1777 int
1778 ext2fifo_write(struct vop_write_args *ap)
1779 {
1780 int error, resid;
1781 struct inode *ip;
1782 struct uio *uio;
1783
1784 uio = ap->a_uio;
1785 resid = uio->uio_resid;
1786 error = VOCALL(&fifo_vnode_vops, &ap->a_head);
1787 ip = VTOI(ap->a_vp);
1788 if (ip != NULL && (uio->uio_resid != resid || (error == 0 && resid != 0)))
1789 VTOI(ap->a_vp)->i_flag |= IN_CHANGE | IN_UPDATE;
1790 return (error);
1791 }
1792
1793 /*
1794 * Close wrapper for fifos.
1795 *
1796 * Update the times on the inode then do device close.
1797 *
1798 * ext2fifo_close(struct vnode *a_vp, int a_fflag, struct ucred *a_cred)
1799 */
1800 static
1801 int
1802 ext2fifo_close(struct vop_close_args *ap)
1803 {
1804 struct vnode *vp = ap->a_vp;
1805
1806 if (VREFCNT(vp) > 1)
1807 ext2_itimes(vp);
1808 return (VOCALL(&fifo_vnode_vops, &ap->a_head));
1809 }
1810
1811 /*
1812 * Kqfilter wrapper for fifos.
1813 *
1814 * Fall through to ext2 kqfilter routines if needed
1815 */
1816 static
1817 int
1818 ext2fifo_kqfilter(struct vop_kqfilter_args *ap)
1819 {
1820 int error;
1821
1822 error = VOCALL(&fifo_vnode_vops, &ap->a_head);
1823 if (error)
1824 error = ext2_kqfilter(ap);
1825 return (error);
1826 }
1827
1828 /*
1829 * Return POSIX pathconf information applicable to ext2 filesystems.
1830 *
1831 * ext2_pathconf(struct vnode *a_vp, int a_name, int *a_retval)
1832 */
1833 static
1834 int
1835 ext2_pathconf(struct vop_pathconf_args *ap)
1836 {
1837 switch (ap->a_name) {
1838 case _PC_LINK_MAX:
1839 *ap->a_retval = LINK_MAX;
1840 return (0);
1841 case _PC_NAME_MAX:
1842 *ap->a_retval = NAME_MAX;
1843 return (0);
1844 case _PC_PATH_MAX:
1845 *ap->a_retval = PATH_MAX;
1846 return (0);
1847 case _PC_PIPE_BUF:
1848 *ap->a_retval = PIPE_BUF;
1849 return (0);
1850 case _PC_CHOWN_RESTRICTED:
1851 *ap->a_retval = 1;
1852 return (0);
1853 case _PC_NO_TRUNC:
1854 *ap->a_retval = 1;
1855 return (0);
1856 default:
1857 return (EINVAL);
1858 }
1859 /* NOTREACHED */
1860 }
1861
1862 /*
1863 * Advisory record locking support
1864 *
1865 * ext2_advlock(struct vnode *a_vp, caddr_t a_id, int a_op, struct flock *a_fl,
1866 * int a_flags)
1867 */
1868 static
1869 int
1870 ext2_advlock(struct vop_advlock_args *ap)
1871 {
1872 struct inode *ip = VTOI(ap->a_vp);
1873
1874 return (lf_advlock(ap, &(ip->i_lockf), ip->i_size));
1875 }
1876
1877 /*
1878 * Initialize the vnode associated with a new inode, handle aliased
1879 * vnodes.
1880 */
1881 int
1882 ext2_vinit(struct mount *mntp, struct vnode **vpp)
1883 {
1884 struct inode *ip;
1885 struct vnode *vp;
1886 struct timeval tv;
1887
1888 vp = *vpp;
1889 ip = VTOI(vp);
1890
1891 switch(vp->v_type = IFTOVT(ip->i_mode)) {
1892 case VCHR:
1893 case VBLK:
1894 vp->v_ops = &mntp->mnt_vn_spec_ops;
1895 addaliasu(vp, umajor(ip->i_rdev), uminor(ip->i_rdev));
1896 break;
1897 case VFIFO:
1898 vp->v_ops = &mntp->mnt_vn_fifo_ops;
1899 break;
1900 case VDIR:
1901 case VREG:
1902 vinitvmio(vp, ip->i_size, PAGE_SIZE, -1); /* XXX */
1903 break;
1904 case VLNK:
1905 if ((ip->i_size >= vp->v_mount->mnt_maxsymlinklen) &&
1906 ip->i_din.di_blocks != 0
1907 ) {
1908 vinitvmio(vp, ip->i_size, PAGE_SIZE, -1);
1909 }
1910 break;
1911 default:
1912 break;
1913
1914 }
1915
1916 if (ip->i_number == EXT2_ROOTINO)
1917 vp->v_flag |= VROOT;
1918 /*
1919 * Initialize modrev times
1920 */
1921 getmicrouptime(&tv);
1922 SETHIGH(ip->i_modrev, tv.tv_sec);
1923 SETLOW(ip->i_modrev, tv.tv_usec * 4294);
1924 *vpp = vp;
1925 return (0);
1926 }
1927
1928 static struct filterops ext2read_filtops =
1929 { FILTEROP_ISFD, NULL, filt_ext2detach, filt_ext2read };
1930 static struct filterops ext2write_filtops =
1931 { FILTEROP_ISFD, NULL, filt_ext2detach, filt_ext2write };
1932 static struct filterops ext2vnode_filtops =
1933 { FILTEROP_ISFD, NULL, filt_ext2detach, filt_ext2vnode };
1934
1935 /*
1936 * ext2_kqfilter(struct vnode *a_vp, struct knote *a_kn)
1937 */
1938 static int
1939 ext2_kqfilter(struct vop_kqfilter_args *ap)
1940 {
1941 struct vnode *vp = ap->a_vp;
1942 struct knote *kn = ap->a_kn;
1943
1944 switch (kn->kn_filter) {
1945 case EVFILT_READ:
1946 kn->kn_fop = &ext2read_filtops;
1947 break;
1948 case EVFILT_WRITE:
1949 kn->kn_fop = &ext2write_filtops;
1950 break;
1951 case EVFILT_VNODE:
1952 kn->kn_fop = &ext2vnode_filtops;
1953 break;
1954 default:
1955 return (EOPNOTSUPP);
1956 }
1957
1958 kn->kn_hook = (caddr_t)vp;
1959
1960 /* XXX: kq token actually protects the list */
1961 lwkt_gettoken(&vp->v_token);
1962 knote_insert(&vp->v_pollinfo.vpi_kqinfo.ki_note, kn);
1963 lwkt_reltoken(&vp->v_token);
1964
1965 return (0);
1966 }
1967
1968 static void
1969 filt_ext2detach(struct knote *kn)
1970 {
1971 struct vnode *vp = (struct vnode *)kn->kn_hook;
1972
1973 lwkt_gettoken(&vp->v_token);
1974 knote_remove(&vp->v_pollinfo.vpi_kqinfo.ki_note, kn);
1975 lwkt_reltoken(&vp->v_token);
1976 }
1977
1978 /*ARGSUSED*/
1979 static int
1980 filt_ext2read(struct knote *kn, long hint)
1981 {
1982 struct vnode *vp = (struct vnode *)kn->kn_hook;
1983 struct inode *ip = VTOI(vp);
1984 off_t off;
1985
1986 /*
1987 * filesystem is gone, so set the EOF flag and schedule
1988 * the knote for deletion.
1989 */
1990 if (hint == NOTE_REVOKE) {
1991 kn->kn_flags |= (EV_EOF | EV_NODATA | EV_ONESHOT);
1992 return (1);
1993 }
1994 off = ip->i_size - kn->kn_fp->f_offset;
1995 kn->kn_data = (off < INTPTR_MAX) ? off : INTPTR_MAX;
1996 if (kn->kn_sfflags & NOTE_OLDAPI)
1997 return(1);
1998 return (kn->kn_data != 0);
1999 }
2000
2001 /*ARGSUSED*/
2002 static int
2003 filt_ext2write(struct knote *kn, long hint)
2004 {
2005 /*
2006 * filesystem is gone, so set the EOF flag and schedule
2007 * the knote for deletion.
2008 */
2009 if (hint == NOTE_REVOKE)
2010 kn->kn_flags |= (EV_EOF | EV_NODATA | EV_ONESHOT);
2011
2012 kn->kn_data = 0;
2013 return (1);
2014 }
2015
2016 static int
2017 filt_ext2vnode(struct knote *kn, long hint)
2018 {
2019 if (kn->kn_sfflags & hint)
2020 kn->kn_fflags |= hint;
2021 if (hint == NOTE_REVOKE) {
2022 kn->kn_flags |= (EV_EOF | EV_NODATA);
2023 return (1);
2024 }
2025 return (kn->kn_fflags != 0);
2026 }
2027
2028 struct vop_ops ext2_vnode_vops = {
2029 .vop_default = vop_defaultop,
2030 .vop_fsync = ext2_fsync,
2031 .vop_read = ext2_read,
2032 .vop_reallocblks = ext2_reallocblks,
2033 .vop_write = ext2_write,
2034 .vop_access = ext2_access,
2035 .vop_advlock = ext2_advlock,
2036 .vop_bmap = ext2_bmap,
2037 .vop_old_lookup = ext2_lookup,
2038 .vop_close = ext2_close,
2039 .vop_old_create = ext2_create,
2040 .vop_getattr = ext2_getattr,
2041 .vop_inactive = ext2_inactive,
2042 .vop_old_link = ext2_link,
2043 .vop_old_mkdir = ext2_mkdir,
2044 .vop_old_mknod = ext2_mknod,
2045 .vop_mmap = ext2_mmap,
2046 .vop_open = ext2_open,
2047 .vop_pathconf = ext2_pathconf,
2048 .vop_kqfilter = ext2_kqfilter,
2049 .vop_print = ext2_print,
2050 .vop_readdir = ext2_readdir,
2051 .vop_readlink = ext2_readlink,
2052 .vop_reclaim = ext2_reclaim,
2053 .vop_old_remove = ext2_remove,
2054 .vop_old_rename = ext2_rename,
2055 .vop_old_rmdir = ext2_rmdir,
2056 .vop_setattr = ext2_setattr,
2057 .vop_strategy = ext2_strategy,
2058 .vop_old_symlink = ext2_symlink,
2059 .vop_old_whiteout = ext2_whiteout,
2060 .vop_getpages = vop_stdgetpages,
2061 .vop_putpages = vop_stdputpages
2062 };
2063
2064 struct vop_ops ext2_spec_vops = {
2065 .vop_default = vop_defaultop,
2066 .vop_fsync = ext2_fsync,
2067 .vop_access = ext2_access,
2068 .vop_close = ext2_close,
2069 .vop_getattr = ext2_getattr,
2070 .vop_inactive = ext2_inactive,
2071 .vop_print = ext2_print,
2072 .vop_read = vop_stdnoread,
2073 .vop_reclaim = ext2_reclaim,
2074 .vop_setattr = ext2_setattr,
2075 .vop_write = vop_stdnowrite
2076 };
2077
2078 struct vop_ops ext2_fifo_vops = {
2079 .vop_default = ext2_vnoperatefifo,
2080 .vop_fsync = ext2_fsync,
2081 .vop_access = ext2_access,
2082 .vop_close = ext2fifo_close,
2083 .vop_getattr = ext2_getattr,
2084 .vop_inactive = ext2_inactive,
2085 .vop_kqfilter = ext2fifo_kqfilter,
2086 .vop_print = ext2_print,
2087 .vop_read = ext2fifo_read,
2088 .vop_reclaim = ext2_reclaim,
2089 .vop_setattr = ext2_setattr,
2090 .vop_write = ext2fifo_write
2091 };
2092
2093 VNODEOP_SET(ext2_vnode_vops);
2094 VNODEOP_SET(ext2_spec_vops);
2095 VNODEOP_SET(ext2_fifo_vops);
2096
2097 /*
2098 * ext2_vnoperate()
2099 */
2100 int
2101 ext2_vnoperate(struct vop_generic_args *ap)
2102 {
2103 return (VOCALL(&ext2_vnode_vops, ap));
2104 }
2105
2106 /*
2107 * ext2_vnoperatefifo()
2108 */
2109 int
2110 ext2_vnoperatefifo(struct vop_generic_args *ap)
2111 {
2112 return (VOCALL(&ext2_fifo_vops, ap));
2113 }
DragonFly BSD