1 /*-
2 * Copyright (c) 1982, 1986, 1989, 1993, 1995
3 * The Regents of the University of California. All rights reserved.
4 * (c) UNIX System Laboratories, Inc.
5 * All or some portions of this file are derived from material licensed
6 * to the University of California by American Telephone and Telegraph
7 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
8 * the permission of UNIX System Laboratories, Inc.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 4. Neither the name of the University nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 *
34 * @(#)ufs_vnops.c 8.27 (Berkeley) 5/27/95
35 */
36
37 #include <sys/cdefs.h>
38 __FBSDID("$FreeBSD: releng/5.4/sys/ufs/ufs/ufs_vnops.c 142241 2005-02-22 15:49:23Z cperciva $");
39
40 #include "opt_mac.h"
41 #include "opt_quota.h"
42 #include "opt_suiddir.h"
43 #include "opt_ufs.h"
44
45 #include <sys/param.h>
46 #include <sys/systm.h>
47 #include <sys/malloc.h>
48 #include <sys/namei.h>
49 #include <sys/kernel.h>
50 #include <sys/fcntl.h>
51 #include <sys/stat.h>
52 #include <sys/bio.h>
53 #include <sys/buf.h>
54 #include <sys/mount.h>
55 #include <sys/unistd.h>
56 #include <sys/vnode.h>
57 #include <sys/dirent.h>
58 #include <sys/lockf.h>
59 #include <sys/event.h>
60 #include <sys/conf.h>
61 #include <sys/acl.h>
62 #include <sys/mac.h>
63 #include <sys/jail.h>
64
65 #include <machine/mutex.h>
66
67 #include <sys/file.h> /* XXX */
68
69 #include <vm/vm.h>
70 #include <vm/vm_extern.h>
71
72 #include <fs/fifofs/fifo.h>
73
74 #include <ufs/ufs/acl.h>
75 #include <ufs/ufs/extattr.h>
76 #include <ufs/ufs/quota.h>
77 #include <ufs/ufs/inode.h>
78 #include <ufs/ufs/dir.h>
79 #include <ufs/ufs/ufsmount.h>
80 #include <ufs/ufs/ufs_extern.h>
81 #ifdef UFS_DIRHASH
82 #include <ufs/ufs/dirhash.h>
83 #endif
84
85 static int ufs_access(struct vop_access_args *);
86 static int ufs_advlock(struct vop_advlock_args *);
87 static int ufs_chmod(struct vnode *, int, struct ucred *, struct thread *);
88 static int ufs_chown(struct vnode *, uid_t, gid_t, struct ucred *, struct thread *);
89 static int ufs_close(struct vop_close_args *);
90 static int ufs_create(struct vop_create_args *);
91 static int ufs_getattr(struct vop_getattr_args *);
92 static int ufs_link(struct vop_link_args *);
93 static int ufs_makeinode(int mode, struct vnode *, struct vnode **, struct componentname *);
94 static int ufs_mkdir(struct vop_mkdir_args *);
95 static int ufs_mknod(struct vop_mknod_args *);
96 static int ufs_open(struct vop_open_args *);
97 static int ufs_pathconf(struct vop_pathconf_args *);
98 static int ufs_lock(struct vop_lock_args *);
99 static int ufs_print(struct vop_print_args *);
100 static int ufs_readlink(struct vop_readlink_args *);
101 static int ufs_remove(struct vop_remove_args *);
102 static int ufs_rename(struct vop_rename_args *);
103 static int ufs_rmdir(struct vop_rmdir_args *);
104 static int ufs_setattr(struct vop_setattr_args *);
105 static int ufs_strategy(struct vop_strategy_args *);
106 static int ufs_symlink(struct vop_symlink_args *);
107 static int ufs_whiteout(struct vop_whiteout_args *);
108 static int ufsfifo_close(struct vop_close_args *);
109 static int ufsfifo_kqfilter(struct vop_kqfilter_args *);
110 static int ufsfifo_read(struct vop_read_args *);
111 static int ufsfifo_write(struct vop_write_args *);
112 static int ufsspec_close(struct vop_close_args *);
113 static int ufsspec_read(struct vop_read_args *);
114 static int ufsspec_write(struct vop_write_args *);
115 static int filt_ufsread(struct knote *kn, long hint);
116 static int filt_ufswrite(struct knote *kn, long hint);
117 static int filt_ufsvnode(struct knote *kn, long hint);
118 static void filt_ufsdetach(struct knote *kn);
119 static int ufs_kqfilter(struct vop_kqfilter_args *ap);
120
121 union _qcvt {
122 int64_t qcvt;
123 int32_t val[2];
124 };
125 #define SETHIGH(q, h) { \
126 union _qcvt tmp; \
127 tmp.qcvt = (q); \
128 tmp.val[_QUAD_HIGHWORD] = (h); \
129 (q) = tmp.qcvt; \
130 }
131 #define SETLOW(q, l) { \
132 union _qcvt tmp; \
133 tmp.qcvt = (q); \
134 tmp.val[_QUAD_LOWWORD] = (l); \
135 (q) = tmp.qcvt; \
136 }
137
138 /*
139 * A virgin directory (no blushing please).
140 */
141 static struct dirtemplate mastertemplate = {
142 0, 12, DT_DIR, 1, ".",
143 0, DIRBLKSIZ - 12, DT_DIR, 2, ".."
144 };
145 static struct odirtemplate omastertemplate = {
146 0, 12, 1, ".",
147 0, DIRBLKSIZ - 12, 2, ".."
148 };
149
150 void
151 ufs_itimes(vp)
152 struct vnode *vp;
153 {
154 struct inode *ip;
155 struct timespec ts;
156
157 ip = VTOI(vp);
158 if ((ip->i_flag & (IN_ACCESS | IN_CHANGE | IN_UPDATE)) == 0)
159 return;
160 if ((vp->v_type == VBLK || vp->v_type == VCHR) && !DOINGSOFTDEP(vp))
161 ip->i_flag |= IN_LAZYMOD;
162 else
163 ip->i_flag |= IN_MODIFIED;
164 if ((vp->v_mount->mnt_flag & MNT_RDONLY) == 0) {
165 vfs_timestamp(&ts);
166 if (ip->i_flag & IN_ACCESS) {
167 DIP_SET(ip, i_atime, ts.tv_sec);
168 DIP_SET(ip, i_atimensec, ts.tv_nsec);
169 }
170 if (ip->i_flag & IN_UPDATE) {
171 DIP_SET(ip, i_mtime, ts.tv_sec);
172 DIP_SET(ip, i_mtimensec, ts.tv_nsec);
173 ip->i_modrev++;
174 }
175 if (ip->i_flag & IN_CHANGE) {
176 DIP_SET(ip, i_ctime, ts.tv_sec);
177 DIP_SET(ip, i_ctimensec, ts.tv_nsec);
178 }
179 }
180 ip->i_flag &= ~(IN_ACCESS | IN_CHANGE | IN_UPDATE);
181 }
182
183 /*
184 * Create a regular file
185 */
186 static int
187 ufs_create(ap)
188 struct vop_create_args /* {
189 struct vnode *a_dvp;
190 struct vnode **a_vpp;
191 struct componentname *a_cnp;
192 struct vattr *a_vap;
193 } */ *ap;
194 {
195 int error;
196
197 error =
198 ufs_makeinode(MAKEIMODE(ap->a_vap->va_type, ap->a_vap->va_mode),
199 ap->a_dvp, ap->a_vpp, ap->a_cnp);
200 if (error)
201 return (error);
202 VN_KNOTE_UNLOCKED(ap->a_dvp, NOTE_WRITE);
203 return (0);
204 }
205
206 /*
207 * Mknod vnode call
208 */
209 /* ARGSUSED */
210 static int
211 ufs_mknod(ap)
212 struct vop_mknod_args /* {
213 struct vnode *a_dvp;
214 struct vnode **a_vpp;
215 struct componentname *a_cnp;
216 struct vattr *a_vap;
217 } */ *ap;
218 {
219 struct vattr *vap = ap->a_vap;
220 struct vnode **vpp = ap->a_vpp;
221 struct inode *ip;
222 ino_t ino;
223 int error;
224
225 error = ufs_makeinode(MAKEIMODE(vap->va_type, vap->va_mode),
226 ap->a_dvp, vpp, ap->a_cnp);
227 if (error)
228 return (error);
229 VN_KNOTE_UNLOCKED(ap->a_dvp, NOTE_WRITE);
230 ip = VTOI(*vpp);
231 ip->i_flag |= IN_ACCESS | IN_CHANGE | IN_UPDATE;
232 if (vap->va_rdev != VNOVAL) {
233 /*
234 * Want to be able to use this to make badblock
235 * inodes, so don't truncate the dev number.
236 */
237 DIP_SET(ip, i_rdev, vap->va_rdev);
238 }
239 /*
240 * Remove inode, then reload it through VFS_VGET so it is
241 * checked to see if it is an alias of an existing entry in
242 * the inode cache.
243 */
244 vput(*vpp);
245 (*vpp)->v_type = VNON;
246 ino = ip->i_number; /* Save this before vgone() invalidates ip. */
247 vgone(*vpp);
248 error = VFS_VGET(ap->a_dvp->v_mount, ino, LK_EXCLUSIVE, vpp);
249 if (error) {
250 *vpp = NULL;
251 return (error);
252 }
253 return (0);
254 }
255
256 /*
257 * Open called.
258 *
259 * Nothing to do.
260 */
261 /* ARGSUSED */
262 static int
263 ufs_open(ap)
264 struct vop_open_args /* {
265 struct vnode *a_vp;
266 int a_mode;
267 struct ucred *a_cred;
268 struct thread *a_td;
269 } */ *ap;
270 {
271
272 /*
273 * Files marked append-only must be opened for appending.
274 */
275 if ((VTOI(ap->a_vp)->i_flags & APPEND) &&
276 (ap->a_mode & (FWRITE | O_APPEND)) == FWRITE)
277 return (EPERM);
278 return (0);
279 }
280
281 /*
282 * Close called.
283 *
284 * Update the times on the inode.
285 */
286 /* ARGSUSED */
287 static int
288 ufs_close(ap)
289 struct vop_close_args /* {
290 struct vnode *a_vp;
291 int a_fflag;
292 struct ucred *a_cred;
293 struct thread *a_td;
294 } */ *ap;
295 {
296 struct vnode *vp = ap->a_vp;
297 struct mount *mp;
298
299 VI_LOCK(vp);
300 if (vp->v_usecount > 1) {
301 ufs_itimes(vp);
302 VI_UNLOCK(vp);
303 } else {
304 VI_UNLOCK(vp);
305 /*
306 * If we are closing the last reference to an unlinked
307 * file, then it will be freed by the inactive routine.
308 * Because the freeing causes a the filesystem to be
309 * modified, it must be held up during periods when the
310 * filesystem is suspended.
311 *
312 * XXX - EAGAIN is returned to prevent vn_close from
313 * repeating the vrele operation.
314 */
315 if (vp->v_type == VREG && VTOI(vp)->i_effnlink == 0) {
316 (void) vn_start_write(vp, &mp, V_WAIT);
317 vrele(vp);
318 vn_finished_write(mp);
319 return (EAGAIN);
320 }
321 }
322 return (0);
323 }
324
325 static int
326 ufs_access(ap)
327 struct vop_access_args /* {
328 struct vnode *a_vp;
329 int a_mode;
330 struct ucred *a_cred;
331 struct thread *a_td;
332 } */ *ap;
333 {
334 struct vnode *vp = ap->a_vp;
335 struct inode *ip = VTOI(vp);
336 mode_t mode = ap->a_mode;
337 int error;
338 #ifdef UFS_ACL
339 struct acl *acl;
340 #endif
341
342 /*
343 * Disallow write attempts on read-only filesystems;
344 * unless the file is a socket, fifo, or a block or
345 * character device resident on the filesystem.
346 */
347 if (mode & VWRITE) {
348 switch (vp->v_type) {
349 case VDIR:
350 case VLNK:
351 case VREG:
352 if (vp->v_mount->mnt_flag & MNT_RDONLY)
353 return (EROFS);
354 #ifdef QUOTA
355 if ((error = getinoquota(ip)) != 0)
356 return (error);
357 #endif
358 break;
359 default:
360 break;
361 }
362 }
363
364 /* If immutable bit set, nobody gets to write it. */
365 if ((mode & VWRITE) && (ip->i_flags & (IMMUTABLE | SF_SNAPSHOT)))
366 return (EPERM);
367
368 #ifdef UFS_ACL
369 if ((vp->v_mount->mnt_flag & MNT_ACLS) != 0) {
370 MALLOC(acl, struct acl *, sizeof(*acl), M_ACL, M_WAITOK);
371 error = VOP_GETACL(vp, ACL_TYPE_ACCESS, acl, ap->a_cred,
372 ap->a_td);
373 switch (error) {
374 case EOPNOTSUPP:
375 error = vaccess(vp->v_type, ip->i_mode, ip->i_uid,
376 ip->i_gid, ap->a_mode, ap->a_cred, NULL);
377 break;
378 case 0:
379 error = vaccess_acl_posix1e(vp->v_type, ip->i_uid,
380 ip->i_gid, acl, ap->a_mode, ap->a_cred, NULL);
381 break;
382 default:
383 printf(
384 "ufs_access(): Error retrieving ACL on object (%d).\n",
385 error);
386 /*
387 * XXX: Fall back until debugged. Should
388 * eventually possibly log an error, and return
389 * EPERM for safety.
390 */
391 error = vaccess(vp->v_type, ip->i_mode, ip->i_uid,
392 ip->i_gid, ap->a_mode, ap->a_cred, NULL);
393 }
394 FREE(acl, M_ACL);
395 } else
396 #endif /* !UFS_ACL */
397 error = vaccess(vp->v_type, ip->i_mode, ip->i_uid, ip->i_gid,
398 ap->a_mode, ap->a_cred, NULL);
399 return (error);
400 }
401
402 /* ARGSUSED */
403 static int
404 ufs_getattr(ap)
405 struct vop_getattr_args /* {
406 struct vnode *a_vp;
407 struct vattr *a_vap;
408 struct ucred *a_cred;
409 struct thread *a_td;
410 } */ *ap;
411 {
412 struct vnode *vp = ap->a_vp;
413 struct inode *ip = VTOI(vp);
414 struct vattr *vap = ap->a_vap;
415
416 ufs_itimes(vp);
417 /*
418 * Copy from inode table
419 */
420 vap->va_fsid = dev2udev(ip->i_dev);
421 vap->va_fileid = ip->i_number;
422 vap->va_mode = ip->i_mode & ~IFMT;
423 vap->va_nlink = ip->i_effnlink;
424 vap->va_uid = ip->i_uid;
425 vap->va_gid = ip->i_gid;
426 if (ip->i_ump->um_fstype == UFS1) {
427 vap->va_rdev = ip->i_din1->di_rdev;
428 vap->va_size = ip->i_din1->di_size;
429 vap->va_atime.tv_sec = ip->i_din1->di_atime;
430 vap->va_atime.tv_nsec = ip->i_din1->di_atimensec;
431 vap->va_mtime.tv_sec = ip->i_din1->di_mtime;
432 vap->va_mtime.tv_nsec = ip->i_din1->di_mtimensec;
433 vap->va_ctime.tv_sec = ip->i_din1->di_ctime;
434 vap->va_ctime.tv_nsec = ip->i_din1->di_ctimensec;
435 vap->va_birthtime.tv_sec = 0;
436 vap->va_birthtime.tv_nsec = 0;
437 vap->va_bytes = dbtob((u_quad_t)ip->i_din1->di_blocks);
438 } else {
439 vap->va_rdev = ip->i_din2->di_rdev;
440 vap->va_size = ip->i_din2->di_size;
441 vap->va_atime.tv_sec = ip->i_din2->di_atime;
442 vap->va_atime.tv_nsec = ip->i_din2->di_atimensec;
443 vap->va_mtime.tv_sec = ip->i_din2->di_mtime;
444 vap->va_mtime.tv_nsec = ip->i_din2->di_mtimensec;
445 vap->va_ctime.tv_sec = ip->i_din2->di_ctime;
446 vap->va_ctime.tv_nsec = ip->i_din2->di_ctimensec;
447 vap->va_birthtime.tv_sec = ip->i_din2->di_birthtime;
448 vap->va_birthtime.tv_nsec = ip->i_din2->di_birthnsec;
449 vap->va_bytes = dbtob((u_quad_t)ip->i_din2->di_blocks);
450 }
451 vap->va_flags = ip->i_flags;
452 vap->va_gen = ip->i_gen;
453 vap->va_blocksize = vp->v_mount->mnt_stat.f_iosize;
454 vap->va_type = IFTOVT(ip->i_mode);
455 vap->va_filerev = ip->i_modrev;
456 return (0);
457 }
458
459 /*
460 * Set attribute vnode op. called from several syscalls
461 */
462 static int
463 ufs_setattr(ap)
464 struct vop_setattr_args /* {
465 struct vnode *a_vp;
466 struct vattr *a_vap;
467 struct ucred *a_cred;
468 struct thread *a_td;
469 } */ *ap;
470 {
471 struct vattr *vap = ap->a_vap;
472 struct vnode *vp = ap->a_vp;
473 struct inode *ip = VTOI(vp);
474 struct ucred *cred = ap->a_cred;
475 struct thread *td = ap->a_td;
476 int error;
477
478 /*
479 * Check for unsettable attributes.
480 */
481 if ((vap->va_type != VNON) || (vap->va_nlink != VNOVAL) ||
482 (vap->va_fsid != VNOVAL) || (vap->va_fileid != VNOVAL) ||
483 (vap->va_blocksize != VNOVAL) || (vap->va_rdev != VNOVAL) ||
484 ((int)vap->va_bytes != VNOVAL) || (vap->va_gen != VNOVAL)) {
485 return (EINVAL);
486 }
487 if (vap->va_flags != VNOVAL) {
488 if (vp->v_mount->mnt_flag & MNT_RDONLY)
489 return (EROFS);
490 /*
491 * Callers may only modify the file flags on objects they
492 * have VADMIN rights for.
493 */
494 if ((error = VOP_ACCESS(vp, VADMIN, cred, td)))
495 return (error);
496 /*
497 * Unprivileged processes are not permitted to unset system
498 * flags, or modify flags if any system flags are set.
499 * Privileged non-jail processes may not modify system flags
500 * if securelevel > 0 and any existing system flags are set.
501 * Privileged jail processes behave like privileged non-jail
502 * processes if the security.jail.chflags_allowed sysctl is
503 * is non-zero; otherwise, they behave like unprivileged
504 * processes.
505 */
506 if (!suser_cred(cred,
507 jail_chflags_allowed ? SUSER_ALLOWJAIL : 0)) {
508 if (ip->i_flags
509 & (SF_NOUNLINK | SF_IMMUTABLE | SF_APPEND)) {
510 error = securelevel_gt(cred, 0);
511 if (error)
512 return (error);
513 }
514 /* Snapshot flag cannot be set or cleared */
515 if (((vap->va_flags & SF_SNAPSHOT) != 0 &&
516 (ip->i_flags & SF_SNAPSHOT) == 0) ||
517 ((vap->va_flags & SF_SNAPSHOT) == 0 &&
518 (ip->i_flags & SF_SNAPSHOT) != 0))
519 return (EPERM);
520 ip->i_flags = vap->va_flags;
521 DIP_SET(ip, i_flags, vap->va_flags);
522 } else {
523 if (ip->i_flags
524 & (SF_NOUNLINK | SF_IMMUTABLE | SF_APPEND) ||
525 (vap->va_flags & UF_SETTABLE) != vap->va_flags)
526 return (EPERM);
527 ip->i_flags &= SF_SETTABLE;
528 ip->i_flags |= (vap->va_flags & UF_SETTABLE);
529 DIP_SET(ip, i_flags, ip->i_flags);
530 }
531 ip->i_flag |= IN_CHANGE;
532 if (vap->va_flags & (IMMUTABLE | APPEND))
533 return (0);
534 }
535 if (ip->i_flags & (IMMUTABLE | APPEND))
536 return (EPERM);
537 /*
538 * Go through the fields and update iff not VNOVAL.
539 */
540 if (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL) {
541 if (vp->v_mount->mnt_flag & MNT_RDONLY)
542 return (EROFS);
543 if ((error = ufs_chown(vp, vap->va_uid, vap->va_gid, cred,
544 td)) != 0)
545 return (error);
546 }
547 if (vap->va_size != VNOVAL) {
548 /*
549 * Disallow write attempts on read-only filesystems;
550 * unless the file is a socket, fifo, or a block or
551 * character device resident on the filesystem.
552 */
553 switch (vp->v_type) {
554 case VDIR:
555 return (EISDIR);
556 case VLNK:
557 case VREG:
558 if (vp->v_mount->mnt_flag & MNT_RDONLY)
559 return (EROFS);
560 if ((ip->i_flags & SF_SNAPSHOT) != 0)
561 return (EPERM);
562 break;
563 default:
564 break;
565 }
566 if ((error = UFS_TRUNCATE(vp, vap->va_size, IO_NORMAL,
567 cred, td)) != 0)
568 return (error);
569 }
570 if (vap->va_atime.tv_sec != VNOVAL ||
571 vap->va_mtime.tv_sec != VNOVAL ||
572 vap->va_birthtime.tv_sec != VNOVAL) {
573 if (vp->v_mount->mnt_flag & MNT_RDONLY)
574 return (EROFS);
575 if ((ip->i_flags & SF_SNAPSHOT) != 0)
576 return (EPERM);
577 /*
578 * From utimes(2):
579 * If times is NULL, ... The caller must be the owner of
580 * the file, have permission to write the file, or be the
581 * super-user.
582 * If times is non-NULL, ... The caller must be the owner of
583 * the file or be the super-user.
584 */
585 if ((error = VOP_ACCESS(vp, VADMIN, cred, td)) &&
586 ((vap->va_vaflags & VA_UTIMES_NULL) == 0 ||
587 (error = VOP_ACCESS(vp, VWRITE, cred, td))))
588 return (error);
589 if (vap->va_atime.tv_sec != VNOVAL)
590 ip->i_flag |= IN_ACCESS;
591 if (vap->va_mtime.tv_sec != VNOVAL)
592 ip->i_flag |= IN_CHANGE | IN_UPDATE;
593 if (vap->va_birthtime.tv_sec != VNOVAL &&
594 ip->i_ump->um_fstype == UFS2)
595 ip->i_flag |= IN_MODIFIED;
596 ufs_itimes(vp);
597 if (vap->va_atime.tv_sec != VNOVAL) {
598 DIP_SET(ip, i_atime, vap->va_atime.tv_sec);
599 DIP_SET(ip, i_atimensec, vap->va_atime.tv_nsec);
600 }
601 if (vap->va_mtime.tv_sec != VNOVAL) {
602 DIP_SET(ip, i_mtime, vap->va_mtime.tv_sec);
603 DIP_SET(ip, i_mtimensec, vap->va_mtime.tv_nsec);
604 }
605 if (vap->va_birthtime.tv_sec != VNOVAL &&
606 ip->i_ump->um_fstype == UFS2) {
607 ip->i_din2->di_birthtime = vap->va_birthtime.tv_sec;
608 ip->i_din2->di_birthnsec = vap->va_birthtime.tv_nsec;
609 }
610 error = UFS_UPDATE(vp, 0);
611 if (error)
612 return (error);
613 }
614 error = 0;
615 if (vap->va_mode != (mode_t)VNOVAL) {
616 if (vp->v_mount->mnt_flag & MNT_RDONLY)
617 return (EROFS);
618 if ((ip->i_flags & SF_SNAPSHOT) != 0 && (vap->va_mode &
619 (S_IXUSR | S_IWUSR | S_IXGRP | S_IWGRP | S_IXOTH | S_IWOTH)))
620 return (EPERM);
621 error = ufs_chmod(vp, (int)vap->va_mode, cred, td);
622 }
623 VN_KNOTE_UNLOCKED(vp, NOTE_ATTRIB);
624 return (error);
625 }
626
627 /*
628 * Change the mode on a file.
629 * Inode must be locked before calling.
630 */
631 static int
632 ufs_chmod(vp, mode, cred, td)
633 struct vnode *vp;
634 int mode;
635 struct ucred *cred;
636 struct thread *td;
637 {
638 struct inode *ip = VTOI(vp);
639 int error;
640
641 /*
642 * To modify the permissions on a file, must possess VADMIN
643 * for that file.
644 */
645 if ((error = VOP_ACCESS(vp, VADMIN, cred, td)))
646 return (error);
647 /*
648 * Privileged processes may set the sticky bit on non-directories,
649 * as well as set the setgid bit on a file with a group that the
650 * process is not a member of. Both of these are allowed in
651 * jail(8).
652 */
653 if (vp->v_type != VDIR && (mode & S_ISTXT)) {
654 if (suser_cred(cred, SUSER_ALLOWJAIL))
655 return (EFTYPE);
656 }
657 if (!groupmember(ip->i_gid, cred) && (mode & ISGID)) {
658 error = suser_cred(cred, SUSER_ALLOWJAIL);
659 if (error)
660 return (error);
661 }
662 ip->i_mode &= ~ALLPERMS;
663 ip->i_mode |= (mode & ALLPERMS);
664 DIP_SET(ip, i_mode, ip->i_mode);
665 ip->i_flag |= IN_CHANGE;
666 return (0);
667 }
668
669 /*
670 * Perform chown operation on inode ip;
671 * inode must be locked prior to call.
672 */
673 static int
674 ufs_chown(vp, uid, gid, cred, td)
675 struct vnode *vp;
676 uid_t uid;
677 gid_t gid;
678 struct ucred *cred;
679 struct thread *td;
680 {
681 struct inode *ip = VTOI(vp);
682 uid_t ouid;
683 gid_t ogid;
684 int error = 0;
685 #ifdef QUOTA
686 int i;
687 ufs2_daddr_t change;
688 #endif
689
690 if (uid == (uid_t)VNOVAL)
691 uid = ip->i_uid;
692 if (gid == (gid_t)VNOVAL)
693 gid = ip->i_gid;
694 /*
695 * To modify the ownership of a file, must possess VADMIN
696 * for that file.
697 */
698 if ((error = VOP_ACCESS(vp, VADMIN, cred, td)))
699 return (error);
700 /*
701 * To change the owner of a file, or change the group of a file
702 * to a group of which we are not a member, the caller must
703 * have privilege.
704 */
705 if ((uid != ip->i_uid ||
706 (gid != ip->i_gid && !groupmember(gid, cred))) &&
707 (error = suser_cred(cred, SUSER_ALLOWJAIL)))
708 return (error);
709 ogid = ip->i_gid;
710 ouid = ip->i_uid;
711 #ifdef QUOTA
712 if ((error = getinoquota(ip)) != 0)
713 return (error);
714 if (ouid == uid) {
715 dqrele(vp, ip->i_dquot[USRQUOTA]);
716 ip->i_dquot[USRQUOTA] = NODQUOT;
717 }
718 if (ogid == gid) {
719 dqrele(vp, ip->i_dquot[GRPQUOTA]);
720 ip->i_dquot[GRPQUOTA] = NODQUOT;
721 }
722 change = DIP(ip, i_blocks);
723 (void) chkdq(ip, -change, cred, CHOWN);
724 (void) chkiq(ip, -1, cred, CHOWN);
725 for (i = 0; i < MAXQUOTAS; i++) {
726 dqrele(vp, ip->i_dquot[i]);
727 ip->i_dquot[i] = NODQUOT;
728 }
729 #endif
730 ip->i_gid = gid;
731 DIP_SET(ip, i_gid, gid);
732 ip->i_uid = uid;
733 DIP_SET(ip, i_uid, uid);
734 #ifdef QUOTA
735 if ((error = getinoquota(ip)) == 0) {
736 if (ouid == uid) {
737 dqrele(vp, ip->i_dquot[USRQUOTA]);
738 ip->i_dquot[USRQUOTA] = NODQUOT;
739 }
740 if (ogid == gid) {
741 dqrele(vp, ip->i_dquot[GRPQUOTA]);
742 ip->i_dquot[GRPQUOTA] = NODQUOT;
743 }
744 if ((error = chkdq(ip, change, cred, CHOWN)) == 0) {
745 if ((error = chkiq(ip, 1, cred, CHOWN)) == 0)
746 goto good;
747 else
748 (void) chkdq(ip, -change, cred, CHOWN|FORCE);
749 }
750 for (i = 0; i < MAXQUOTAS; i++) {
751 dqrele(vp, ip->i_dquot[i]);
752 ip->i_dquot[i] = NODQUOT;
753 }
754 }
755 ip->i_gid = ogid;
756 DIP_SET(ip, i_gid, ogid);
757 ip->i_uid = ouid;
758 DIP_SET(ip, i_uid, ouid);
759 if (getinoquota(ip) == 0) {
760 if (ouid == uid) {
761 dqrele(vp, ip->i_dquot[USRQUOTA]);
762 ip->i_dquot[USRQUOTA] = NODQUOT;
763 }
764 if (ogid == gid) {
765 dqrele(vp, ip->i_dquot[GRPQUOTA]);
766 ip->i_dquot[GRPQUOTA] = NODQUOT;
767 }
768 (void) chkdq(ip, change, cred, FORCE|CHOWN);
769 (void) chkiq(ip, 1, cred, FORCE|CHOWN);
770 (void) getinoquota(ip);
771 }
772 return (error);
773 good:
774 if (getinoquota(ip))
775 panic("ufs_chown: lost quota");
776 #endif /* QUOTA */
777 ip->i_flag |= IN_CHANGE;
778 if (suser_cred(cred, SUSER_ALLOWJAIL) && (ouid != uid || ogid != gid)) {
779 ip->i_mode &= ~(ISUID | ISGID);
780 DIP_SET(ip, i_mode, ip->i_mode);
781 }
782 return (0);
783 }
784
785 static int
786 ufs_remove(ap)
787 struct vop_remove_args /* {
788 struct vnode *a_dvp;
789 struct vnode *a_vp;
790 struct componentname *a_cnp;
791 } */ *ap;
792 {
793 struct inode *ip;
794 struct vnode *vp = ap->a_vp;
795 struct vnode *dvp = ap->a_dvp;
796 int error;
797
798 ip = VTOI(vp);
799 if ((ip->i_flags & (NOUNLINK | IMMUTABLE | APPEND)) ||
800 (VTOI(dvp)->i_flags & APPEND)) {
801 error = EPERM;
802 goto out;
803 }
804 error = ufs_dirremove(dvp, ip, ap->a_cnp->cn_flags, 0);
805 if (ip->i_nlink <= 0)
806 vp->v_vflag |= VV_NOSYNC;
807 VN_KNOTE_UNLOCKED(vp, NOTE_DELETE);
808 VN_KNOTE_UNLOCKED(dvp, NOTE_WRITE);
809 out:
810 return (error);
811 }
812
813 /*
814 * link vnode call
815 */
816 static int
817 ufs_link(ap)
818 struct vop_link_args /* {
819 struct vnode *a_tdvp;
820 struct vnode *a_vp;
821 struct componentname *a_cnp;
822 } */ *ap;
823 {
824 struct vnode *vp = ap->a_vp;
825 struct vnode *tdvp = ap->a_tdvp;
826 struct componentname *cnp = ap->a_cnp;
827 struct inode *ip;
828 struct direct newdir;
829 int error;
830
831 #ifdef DIAGNOSTIC
832 if ((cnp->cn_flags & HASBUF) == 0)
833 panic("ufs_link: no name");
834 #endif
835 if (tdvp->v_mount != vp->v_mount) {
836 error = EXDEV;
837 goto out;
838 }
839 ip = VTOI(vp);
840 if ((nlink_t)ip->i_nlink >= LINK_MAX) {
841 error = EMLINK;
842 goto out;
843 }
844 if (ip->i_flags & (IMMUTABLE | APPEND)) {
845 error = EPERM;
846 goto out;
847 }
848 ip->i_effnlink++;
849 ip->i_nlink++;
850 DIP_SET(ip, i_nlink, ip->i_nlink);
851 ip->i_flag |= IN_CHANGE;
852 if (DOINGSOFTDEP(vp))
853 softdep_change_linkcnt(ip);
854 error = UFS_UPDATE(vp, !(DOINGSOFTDEP(vp) | DOINGASYNC(vp)));
855 if (!error) {
856 ufs_makedirentry(ip, cnp, &newdir);
857 error = ufs_direnter(tdvp, vp, &newdir, cnp, NULL);
858 }
859
860 if (error) {
861 ip->i_effnlink--;
862 ip->i_nlink--;
863 DIP_SET(ip, i_nlink, ip->i_nlink);
864 ip->i_flag |= IN_CHANGE;
865 if (DOINGSOFTDEP(vp))
866 softdep_change_linkcnt(ip);
867 }
868 out:
869 VN_KNOTE_UNLOCKED(vp, NOTE_LINK);
870 VN_KNOTE_UNLOCKED(tdvp, NOTE_WRITE);
871 return (error);
872 }
873
874 /*
875 * whiteout vnode call
876 */
877 static int
878 ufs_whiteout(ap)
879 struct vop_whiteout_args /* {
880 struct vnode *a_dvp;
881 struct componentname *a_cnp;
882 int a_flags;
883 } */ *ap;
884 {
885 struct vnode *dvp = ap->a_dvp;
886 struct componentname *cnp = ap->a_cnp;
887 struct direct newdir;
888 int error = 0;
889
890 switch (ap->a_flags) {
891 case LOOKUP:
892 /* 4.4 format directories support whiteout operations */
893 if (dvp->v_mount->mnt_maxsymlinklen > 0)
894 return (0);
895 return (EOPNOTSUPP);
896
897 case CREATE:
898 /* create a new directory whiteout */
899 #ifdef DIAGNOSTIC
900 if ((cnp->cn_flags & SAVENAME) == 0)
901 panic("ufs_whiteout: missing name");
902 if (dvp->v_mount->mnt_maxsymlinklen <= 0)
903 panic("ufs_whiteout: old format filesystem");
904 #endif
905
906 newdir.d_ino = WINO;
907 newdir.d_namlen = cnp->cn_namelen;
908 bcopy(cnp->cn_nameptr, newdir.d_name, (unsigned)cnp->cn_namelen + 1);
909 newdir.d_type = DT_WHT;
910 error = ufs_direnter(dvp, NULL, &newdir, cnp, NULL);
911 break;
912
913 case DELETE:
914 /* remove an existing directory whiteout */
915 #ifdef DIAGNOSTIC
916 if (dvp->v_mount->mnt_maxsymlinklen <= 0)
917 panic("ufs_whiteout: old format filesystem");
918 #endif
919
920 cnp->cn_flags &= ~DOWHITEOUT;
921 error = ufs_dirremove(dvp, NULL, cnp->cn_flags, 0);
922 break;
923 default:
924 panic("ufs_whiteout: unknown op");
925 }
926 return (error);
927 }
928
929 /*
930 * Rename system call.
931 * rename("foo", "bar");
932 * is essentially
933 * unlink("bar");
934 * link("foo", "bar");
935 * unlink("foo");
936 * but ``atomically''. Can't do full commit without saving state in the
937 * inode on disk which isn't feasible at this time. Best we can do is
938 * always guarantee the target exists.
939 *
940 * Basic algorithm is:
941 *
942 * 1) Bump link count on source while we're linking it to the
943 * target. This also ensure the inode won't be deleted out
944 * from underneath us while we work (it may be truncated by
945 * a concurrent `trunc' or `open' for creation).
946 * 2) Link source to destination. If destination already exists,
947 * delete it first.
948 * 3) Unlink source reference to inode if still around. If a
949 * directory was moved and the parent of the destination
950 * is different from the source, patch the ".." entry in the
951 * directory.
952 */
953 static int
954 ufs_rename(ap)
955 struct vop_rename_args /* {
956 struct vnode *a_fdvp;
957 struct vnode *a_fvp;
958 struct componentname *a_fcnp;
959 struct vnode *a_tdvp;
960 struct vnode *a_tvp;
961 struct componentname *a_tcnp;
962 } */ *ap;
963 {
964 struct vnode *tvp = ap->a_tvp;
965 struct vnode *tdvp = ap->a_tdvp;
966 struct vnode *fvp = ap->a_fvp;
967 struct vnode *fdvp = ap->a_fdvp;
968 struct componentname *tcnp = ap->a_tcnp;
969 struct componentname *fcnp = ap->a_fcnp;
970 struct thread *td = fcnp->cn_thread;
971 struct inode *ip, *xp, *dp;
972 struct direct newdir;
973 int doingdirectory = 0, oldparent = 0, newparent = 0;
974 int error = 0, ioflag;
975
976 #ifdef DIAGNOSTIC
977 if ((tcnp->cn_flags & HASBUF) == 0 ||
978 (fcnp->cn_flags & HASBUF) == 0)
979 panic("ufs_rename: no name");
980 #endif
981 /*
982 * Check for cross-device rename.
983 */
984 if ((fvp->v_mount != tdvp->v_mount) ||
985 (tvp && (fvp->v_mount != tvp->v_mount))) {
986 error = EXDEV;
987 abortit:
988 if (tdvp == tvp)
989 vrele(tdvp);
990 else
991 vput(tdvp);
992 if (tvp)
993 vput(tvp);
994 vrele(fdvp);
995 vrele(fvp);
996 return (error);
997 }
998
999 if (tvp && ((VTOI(tvp)->i_flags & (NOUNLINK | IMMUTABLE | APPEND)) ||
1000 (VTOI(tdvp)->i_flags & APPEND))) {
1001 error = EPERM;
1002 goto abortit;
1003 }
1004
1005 /*
1006 * Renaming a file to itself has no effect. The upper layers should
1007 * not call us in that case. Temporarily just warn if they do.
1008 */
1009 if (fvp == tvp) {
1010 printf("ufs_rename: fvp == tvp (can't happen)\n");
1011 error = 0;
1012 goto abortit;
1013 }
1014
1015 if ((error = vn_lock(fvp, LK_EXCLUSIVE, td)) != 0)
1016 goto abortit;
1017 dp = VTOI(fdvp);
1018 ip = VTOI(fvp);
1019 if (ip->i_nlink >= LINK_MAX) {
1020 VOP_UNLOCK(fvp, 0, td);
1021 error = EMLINK;
1022 goto abortit;
1023 }
1024 if ((ip->i_flags & (NOUNLINK | IMMUTABLE | APPEND))
1025 || (dp->i_flags & APPEND)) {
1026 VOP_UNLOCK(fvp, 0, td);
1027 error = EPERM;
1028 goto abortit;
1029 }
1030 if ((ip->i_mode & IFMT) == IFDIR) {
1031 /*
1032 * Avoid ".", "..", and aliases of "." for obvious reasons.
1033 */
1034 if ((fcnp->cn_namelen == 1 && fcnp->cn_nameptr[0] == '.') ||
1035 dp == ip || (fcnp->cn_flags | tcnp->cn_flags) & ISDOTDOT ||
1036 (ip->i_flag & IN_RENAME)) {
1037 VOP_UNLOCK(fvp, 0, td);
1038 error = EINVAL;
1039 goto abortit;
1040 }
1041 ip->i_flag |= IN_RENAME;
1042 oldparent = dp->i_number;
1043 doingdirectory = 1;
1044 }
1045 VN_KNOTE_UNLOCKED(fdvp, NOTE_WRITE); /* XXX right place? */
1046 vrele(fdvp);
1047
1048 /*
1049 * When the target exists, both the directory
1050 * and target vnodes are returned locked.
1051 */
1052 dp = VTOI(tdvp);
1053 xp = NULL;
1054 if (tvp)
1055 xp = VTOI(tvp);
1056
1057 /*
1058 * 1) Bump link count while we're moving stuff
1059 * around. If we crash somewhere before
1060 * completing our work, the link count
1061 * may be wrong, but correctable.
1062 */
1063 ip->i_effnlink++;
1064 ip->i_nlink++;
1065 DIP_SET(ip, i_nlink, ip->i_nlink);
1066 ip->i_flag |= IN_CHANGE;
1067 if (DOINGSOFTDEP(fvp))
1068 softdep_change_linkcnt(ip);
1069 if ((error = UFS_UPDATE(fvp, !(DOINGSOFTDEP(fvp) |
1070 DOINGASYNC(fvp)))) != 0) {
1071 VOP_UNLOCK(fvp, 0, td);
1072 goto bad;
1073 }
1074
1075 /*
1076 * If ".." must be changed (ie the directory gets a new
1077 * parent) then the source directory must not be in the
1078 * directory heirarchy above the target, as this would
1079 * orphan everything below the source directory. Also
1080 * the user must have write permission in the source so
1081 * as to be able to change "..". We must repeat the call
1082 * to namei, as the parent directory is unlocked by the
1083 * call to checkpath().
1084 */
1085 error = VOP_ACCESS(fvp, VWRITE, tcnp->cn_cred, tcnp->cn_thread);
1086 VOP_UNLOCK(fvp, 0, td);
1087 if (oldparent != dp->i_number)
1088 newparent = dp->i_number;
1089 if (doingdirectory && newparent) {
1090 if (error) /* write access check above */
1091 goto bad;
1092 if (xp != NULL)
1093 vput(tvp);
1094 error = ufs_checkpath(ip, dp, tcnp->cn_cred);
1095 if (error)
1096 goto out;
1097 if ((tcnp->cn_flags & SAVESTART) == 0)
1098 panic("ufs_rename: lost to startdir");
1099 VREF(tdvp);
1100 error = relookup(tdvp, &tvp, tcnp);
1101 if (error)
1102 goto out;
1103 vrele(tdvp);
1104 dp = VTOI(tdvp);
1105 xp = NULL;
1106 if (tvp)
1107 xp = VTOI(tvp);
1108 }
1109 /*
1110 * 2) If target doesn't exist, link the target
1111 * to the source and unlink the source.
1112 * Otherwise, rewrite the target directory
1113 * entry to reference the source inode and
1114 * expunge the original entry's existence.
1115 */
1116 if (xp == NULL) {
1117 if (dp->i_dev != ip->i_dev)
1118 panic("ufs_rename: EXDEV");
1119 /*
1120 * Account for ".." in new directory.
1121 * When source and destination have the same
1122 * parent we don't fool with the link count.
1123 */
1124 if (doingdirectory && newparent) {
1125 if ((nlink_t)dp->i_nlink >= LINK_MAX) {
1126 error = EMLINK;
1127 goto bad;
1128 }
1129 dp->i_effnlink++;
1130 dp->i_nlink++;
1131 DIP_SET(dp, i_nlink, dp->i_nlink);
1132 dp->i_flag |= IN_CHANGE;
1133 if (DOINGSOFTDEP(tdvp))
1134 softdep_change_linkcnt(dp);
1135 error = UFS_UPDATE(tdvp, !(DOINGSOFTDEP(tdvp) |
1136 DOINGASYNC(tdvp)));
1137 if (error)
1138 goto bad;
1139 }
1140 ufs_makedirentry(ip, tcnp, &newdir);
1141 error = ufs_direnter(tdvp, NULL, &newdir, tcnp, NULL);
1142 if (error) {
1143 if (doingdirectory && newparent) {
1144 dp->i_effnlink--;
1145 dp->i_nlink--;
1146 DIP_SET(dp, i_nlink, dp->i_nlink);
1147 dp->i_flag |= IN_CHANGE;
1148 if (DOINGSOFTDEP(tdvp))
1149 softdep_change_linkcnt(dp);
1150 (void)UFS_UPDATE(tdvp, 1);
1151 }
1152 goto bad;
1153 }
1154 VN_KNOTE_UNLOCKED(tdvp, NOTE_WRITE);
1155 vput(tdvp);
1156 } else {
1157 if (xp->i_dev != dp->i_dev || xp->i_dev != ip->i_dev)
1158 panic("ufs_rename: EXDEV");
1159 /*
1160 * Short circuit rename(foo, foo).
1161 */
1162 if (xp->i_number == ip->i_number)
1163 panic("ufs_rename: same file");
1164 /*
1165 * If the parent directory is "sticky", then the caller
1166 * must possess VADMIN for the parent directory, or the
1167 * destination of the rename. This implements append-only
1168 * directories.
1169 */
1170 if ((dp->i_mode & S_ISTXT) &&
1171 VOP_ACCESS(tdvp, VADMIN, tcnp->cn_cred, td) &&
1172 VOP_ACCESS(tvp, VADMIN, tcnp->cn_cred, td)) {
1173 error = EPERM;
1174 goto bad;
1175 }
1176 /*
1177 * Target must be empty if a directory and have no links
1178 * to it. Also, ensure source and target are compatible
1179 * (both directories, or both not directories).
1180 */
1181 if ((xp->i_mode&IFMT) == IFDIR) {
1182 if ((xp->i_effnlink > 2) ||
1183 !ufs_dirempty(xp, dp->i_number, tcnp->cn_cred)) {
1184 error = ENOTEMPTY;
1185 goto bad;
1186 }
1187 if (!doingdirectory) {
1188 error = ENOTDIR;
1189 goto bad;
1190 }
1191 cache_purge(tdvp);
1192 } else if (doingdirectory) {
1193 error = EISDIR;
1194 goto bad;
1195 }
1196 error = ufs_dirrewrite(dp, xp, ip->i_number,
1197 IFTODT(ip->i_mode),
1198 (doingdirectory && newparent) ? newparent : doingdirectory);
1199 if (error)
1200 goto bad;
1201 if (doingdirectory) {
1202 if (!newparent) {
1203 dp->i_effnlink--;
1204 if (DOINGSOFTDEP(tdvp))
1205 softdep_change_linkcnt(dp);
1206 }
1207 xp->i_effnlink--;
1208 if (DOINGSOFTDEP(tvp))
1209 softdep_change_linkcnt(xp);
1210 }
1211 if (doingdirectory && !DOINGSOFTDEP(tvp)) {
1212 /*
1213 * Truncate inode. The only stuff left in the directory
1214 * is "." and "..". The "." reference is inconsequential
1215 * since we are quashing it. We have removed the "."
1216 * reference and the reference in the parent directory,
1217 * but there may be other hard links. The soft
1218 * dependency code will arrange to do these operations
1219 * after the parent directory entry has been deleted on
1220 * disk, so when running with that code we avoid doing
1221 * them now.
1222 */
1223 if (!newparent) {
1224 dp->i_nlink--;
1225 DIP_SET(dp, i_nlink, dp->i_nlink);
1226 dp->i_flag |= IN_CHANGE;
1227 }
1228 xp->i_nlink--;
1229 DIP_SET(xp, i_nlink, xp->i_nlink);
1230 xp->i_flag |= IN_CHANGE;
1231 ioflag = IO_NORMAL;
1232 if (DOINGASYNC(tvp))
1233 ioflag |= IO_SYNC;
1234 if ((error = UFS_TRUNCATE(tvp, (off_t)0, ioflag,
1235 tcnp->cn_cred, tcnp->cn_thread)) != 0)
1236 goto bad;
1237 }
1238 VN_KNOTE_UNLOCKED(tdvp, NOTE_WRITE);
1239 vput(tdvp);
1240 VN_KNOTE_UNLOCKED(tvp, NOTE_DELETE);
1241 vput(tvp);
1242 xp = NULL;
1243 }
1244
1245 /*
1246 * 3) Unlink the source.
1247 */
1248 fcnp->cn_flags &= ~MODMASK;
1249 fcnp->cn_flags |= LOCKPARENT | LOCKLEAF;
1250 if ((fcnp->cn_flags & SAVESTART) == 0)
1251 panic("ufs_rename: lost from startdir");
1252 VREF(fdvp);
1253 error = relookup(fdvp, &fvp, fcnp);
1254 if (error == 0)
1255 vrele(fdvp);
1256 if (fvp != NULL) {
1257 xp = VTOI(fvp);
1258 dp = VTOI(fdvp);
1259 } else {
1260 /*
1261 * From name has disappeared. IN_RENAME is not sufficient
1262 * to protect against directory races due to timing windows,
1263 * so we have to remove the panic. XXX the only real way
1264 * to solve this issue is at a much higher level. By the
1265 * time we hit ufs_rename() it's too late.
1266 */
1267 #if 0
1268 if (doingdirectory)
1269 panic("ufs_rename: lost dir entry");
1270 #endif
1271 vrele(ap->a_fvp);
1272 return (0);
1273 }
1274 /*
1275 * Ensure that the directory entry still exists and has not
1276 * changed while the new name has been entered. If the source is
1277 * a file then the entry may have been unlinked or renamed. In
1278 * either case there is no further work to be done. If the source
1279 * is a directory then it cannot have been rmdir'ed; the IN_RENAME
1280 * flag ensures that it cannot be moved by another rename or removed
1281 * by a rmdir.
1282 */
1283 if (xp != ip) {
1284 /*
1285 * From name resolves to a different inode. IN_RENAME is
1286 * not sufficient protection against timing window races
1287 * so we can't panic here. XXX the only real way
1288 * to solve this issue is at a much higher level. By the
1289 * time we hit ufs_rename() it's too late.
1290 */
1291 #if 0
1292 if (doingdirectory)
1293 panic("ufs_rename: lost dir entry");
1294 #endif
1295 } else {
1296 /*
1297 * If the source is a directory with a
1298 * new parent, the link count of the old
1299 * parent directory must be decremented
1300 * and ".." set to point to the new parent.
1301 */
1302 if (doingdirectory && newparent) {
1303 xp->i_offset = mastertemplate.dot_reclen;
1304 ufs_dirrewrite(xp, dp, newparent, DT_DIR, 0);
1305 cache_purge(fdvp);
1306 }
1307 error = ufs_dirremove(fdvp, xp, fcnp->cn_flags, 0);
1308 xp->i_flag &= ~IN_RENAME;
1309 }
1310 VN_KNOTE_UNLOCKED(fvp, NOTE_RENAME);
1311 if (dp)
1312 vput(fdvp);
1313 if (xp)
1314 vput(fvp);
1315 vrele(ap->a_fvp);
1316 return (error);
1317
1318 bad:
1319 if (xp)
1320 vput(ITOV(xp));
1321 vput(ITOV(dp));
1322 out:
1323 if (doingdirectory)
1324 ip->i_flag &= ~IN_RENAME;
1325 if (vn_lock(fvp, LK_EXCLUSIVE, td) == 0) {
1326 ip->i_effnlink--;
1327 ip->i_nlink--;
1328 DIP_SET(ip, i_nlink, ip->i_nlink);
1329 ip->i_flag |= IN_CHANGE;
1330 ip->i_flag &= ~IN_RENAME;
1331 if (DOINGSOFTDEP(fvp))
1332 softdep_change_linkcnt(ip);
1333 vput(fvp);
1334 } else
1335 vrele(fvp);
1336 return (error);
1337 }
1338
1339 /*
1340 * Mkdir system call
1341 */
1342 static int
1343 ufs_mkdir(ap)
1344 struct vop_mkdir_args /* {
1345 struct vnode *a_dvp;
1346 struct vnode **a_vpp;
1347 struct componentname *a_cnp;
1348 struct vattr *a_vap;
1349 } */ *ap;
1350 {
1351 struct vnode *dvp = ap->a_dvp;
1352 struct vattr *vap = ap->a_vap;
1353 struct componentname *cnp = ap->a_cnp;
1354 struct inode *ip, *dp;
1355 struct vnode *tvp;
1356 struct buf *bp;
1357 struct dirtemplate dirtemplate, *dtp;
1358 struct direct newdir;
1359 #ifdef UFS_ACL
1360 struct acl *acl, *dacl;
1361 #endif
1362 int error, dmode;
1363 long blkoff;
1364
1365 #ifdef DIAGNOSTIC
1366 if ((cnp->cn_flags & HASBUF) == 0)
1367 panic("ufs_mkdir: no name");
1368 #endif
1369 dp = VTOI(dvp);
1370 if ((nlink_t)dp->i_nlink >= LINK_MAX) {
1371 error = EMLINK;
1372 goto out;
1373 }
1374 dmode = vap->va_mode & 0777;
1375 dmode |= IFDIR;
1376 /*
1377 * Must simulate part of ufs_makeinode here to acquire the inode,
1378 * but not have it entered in the parent directory. The entry is
1379 * made later after writing "." and ".." entries.
1380 */
1381 error = UFS_VALLOC(dvp, dmode, cnp->cn_cred, &tvp);
1382 if (error)
1383 goto out;
1384 ip = VTOI(tvp);
1385 ip->i_gid = dp->i_gid;
1386 DIP_SET(ip, i_gid, dp->i_gid);
1387 #ifdef SUIDDIR
1388 {
1389 #ifdef QUOTA
1390 struct ucred ucred, *ucp;
1391 ucp = cnp->cn_cred;
1392 #endif
1393 /*
1394 * If we are hacking owners here, (only do this where told to)
1395 * and we are not giving it TO root, (would subvert quotas)
1396 * then go ahead and give it to the other user.
1397 * The new directory also inherits the SUID bit.
1398 * If user's UID and dir UID are the same,
1399 * 'give it away' so that the SUID is still forced on.
1400 */
1401 if ((dvp->v_mount->mnt_flag & MNT_SUIDDIR) &&
1402 (dp->i_mode & ISUID) && dp->i_uid) {
1403 dmode |= ISUID;
1404 ip->i_uid = dp->i_uid;
1405 DIP_SET(ip, i_uid, dp->i_uid);
1406 #ifdef QUOTA
1407 if (dp->i_uid != cnp->cn_cred->cr_uid) {
1408 /*
1409 * Make sure the correct user gets charged
1410 * for the space.
1411 * Make a dummy credential for the victim.
1412 * XXX This seems to never be accessed out of
1413 * our context so a stack variable is ok.
1414 */
1415 ucred.cr_ref = 1;
1416 ucred.cr_uid = ip->i_uid;
1417 ucred.cr_ngroups = 1;
1418 ucred.cr_groups[0] = dp->i_gid;
1419 ucp = &ucred;
1420 }
1421 #endif
1422 } else {
1423 ip->i_uid = cnp->cn_cred->cr_uid;
1424 DIP_SET(ip, i_uid, ip->i_uid);
1425 }
1426 #ifdef QUOTA
1427 if ((error = getinoquota(ip)) ||
1428 (error = chkiq(ip, 1, ucp, 0))) {
1429 UFS_VFREE(tvp, ip->i_number, dmode);
1430 vput(tvp);
1431 return (error);
1432 }
1433 #endif
1434 }
1435 #else /* !SUIDDIR */
1436 ip->i_uid = cnp->cn_cred->cr_uid;
1437 DIP_SET(ip, i_uid, ip->i_uid);
1438 #ifdef QUOTA
1439 if ((error = getinoquota(ip)) ||
1440 (error = chkiq(ip, 1, cnp->cn_cred, 0))) {
1441 UFS_VFREE(tvp, ip->i_number, dmode);
1442 vput(tvp);
1443 return (error);
1444 }
1445 #endif
1446 #endif /* !SUIDDIR */
1447 ip->i_flag |= IN_ACCESS | IN_CHANGE | IN_UPDATE;
1448 #ifdef UFS_ACL
1449 acl = dacl = NULL;
1450 if ((dvp->v_mount->mnt_flag & MNT_ACLS) != 0) {
1451 MALLOC(acl, struct acl *, sizeof(*acl), M_ACL, M_WAITOK);
1452 MALLOC(dacl, struct acl *, sizeof(*dacl), M_ACL, M_WAITOK);
1453
1454 /*
1455 * Retrieve default ACL from parent, if any.
1456 */
1457 error = VOP_GETACL(dvp, ACL_TYPE_DEFAULT, acl, cnp->cn_cred,
1458 cnp->cn_thread);
1459 switch (error) {
1460 case 0:
1461 /*
1462 * Retrieved a default ACL, so merge mode and ACL if
1463 * necessary. If the ACL is empty, fall through to
1464 * the "not defined or available" case.
1465 */
1466 if (acl->acl_cnt != 0) {
1467 dmode = acl_posix1e_newfilemode(dmode, acl);
1468 ip->i_mode = dmode;
1469 DIP_SET(ip, i_mode, dmode);
1470 *dacl = *acl;
1471 ufs_sync_acl_from_inode(ip, acl);
1472 break;
1473 }
1474 /* FALLTHROUGH */
1475
1476 case EOPNOTSUPP:
1477 /*
1478 * Just use the mode as-is.
1479 */
1480 ip->i_mode = dmode;
1481 DIP_SET(ip, i_mode, dmode);
1482 FREE(acl, M_ACL);
1483 FREE(dacl, M_ACL);
1484 dacl = acl = NULL;
1485 break;
1486
1487 default:
1488 UFS_VFREE(tvp, ip->i_number, dmode);
1489 vput(tvp);
1490 FREE(acl, M_ACL);
1491 FREE(dacl, M_ACL);
1492 return (error);
1493 }
1494 } else {
1495 #endif /* !UFS_ACL */
1496 ip->i_mode = dmode;
1497 DIP_SET(ip, i_mode, dmode);
1498 #ifdef UFS_ACL
1499 }
1500 #endif
1501 tvp->v_type = VDIR; /* Rest init'd in getnewvnode(). */
1502 ip->i_effnlink = 2;
1503 ip->i_nlink = 2;
1504 DIP_SET(ip, i_nlink, 2);
1505 if (DOINGSOFTDEP(tvp))
1506 softdep_change_linkcnt(ip);
1507 if (cnp->cn_flags & ISWHITEOUT) {
1508 ip->i_flags |= UF_OPAQUE;
1509 DIP_SET(ip, i_flags, ip->i_flags);
1510 }
1511
1512 /*
1513 * Bump link count in parent directory to reflect work done below.
1514 * Should be done before reference is created so cleanup is
1515 * possible if we crash.
1516 */
1517 dp->i_effnlink++;
1518 dp->i_nlink++;
1519 DIP_SET(dp, i_nlink, dp->i_nlink);
1520 dp->i_flag |= IN_CHANGE;
1521 if (DOINGSOFTDEP(dvp))
1522 softdep_change_linkcnt(dp);
1523 error = UFS_UPDATE(tvp, !(DOINGSOFTDEP(dvp) | DOINGASYNC(dvp)));
1524 if (error)
1525 goto bad;
1526 #ifdef MAC
1527 if (dvp->v_mount->mnt_flag & MNT_MULTILABEL) {
1528 error = mac_create_vnode_extattr(cnp->cn_cred, dvp->v_mount,
1529 dvp, tvp, cnp);
1530 if (error)
1531 goto bad;
1532 }
1533 #endif
1534 #ifdef UFS_ACL
1535 if (acl != NULL) {
1536 /*
1537 * XXX: If we abort now, will Soft Updates notify the extattr
1538 * code that the EAs for the file need to be released?
1539 */
1540 error = VOP_SETACL(tvp, ACL_TYPE_ACCESS, acl, cnp->cn_cred,
1541 cnp->cn_thread);
1542 if (error == 0)
1543 error = VOP_SETACL(tvp, ACL_TYPE_DEFAULT, dacl,
1544 cnp->cn_cred, cnp->cn_thread);
1545 switch (error) {
1546 case 0:
1547 break;
1548
1549 case EOPNOTSUPP:
1550 /*
1551 * XXX: This should not happen, as EOPNOTSUPP above
1552 * was supposed to free acl.
1553 */
1554 printf("ufs_mkdir: VOP_GETACL() but no VOP_SETACL()\n");
1555 /*
1556 panic("ufs_mkdir: VOP_GETACL() but no VOP_SETACL()");
1557 */
1558 break;
1559
1560 default:
1561 FREE(acl, M_ACL);
1562 FREE(dacl, M_ACL);
1563 goto bad;
1564 }
1565 FREE(acl, M_ACL);
1566 FREE(dacl, M_ACL);
1567 }
1568 #endif /* !UFS_ACL */
1569
1570 /*
1571 * Initialize directory with "." and ".." from static template.
1572 */
1573 if (dvp->v_mount->mnt_maxsymlinklen > 0
1574 )
1575 dtp = &mastertemplate;
1576 else
1577 dtp = (struct dirtemplate *)&omastertemplate;
1578 dirtemplate = *dtp;
1579 dirtemplate.dot_ino = ip->i_number;
1580 dirtemplate.dotdot_ino = dp->i_number;
1581 if ((error = UFS_BALLOC(tvp, (off_t)0, DIRBLKSIZ, cnp->cn_cred,
1582 BA_CLRBUF, &bp)) != 0)
1583 goto bad;
1584 ip->i_size = DIRBLKSIZ;
1585 DIP_SET(ip, i_size, DIRBLKSIZ);
1586 ip->i_flag |= IN_CHANGE | IN_UPDATE;
1587 vnode_pager_setsize(tvp, (u_long)ip->i_size);
1588 bcopy((caddr_t)&dirtemplate, (caddr_t)bp->b_data, sizeof dirtemplate);
1589 if (DOINGSOFTDEP(tvp)) {
1590 /*
1591 * Ensure that the entire newly allocated block is a
1592 * valid directory so that future growth within the
1593 * block does not have to ensure that the block is
1594 * written before the inode.
1595 */
1596 blkoff = DIRBLKSIZ;
1597 while (blkoff < bp->b_bcount) {
1598 ((struct direct *)
1599 (bp->b_data + blkoff))->d_reclen = DIRBLKSIZ;
1600 blkoff += DIRBLKSIZ;
1601 }
1602 }
1603 if ((error = UFS_UPDATE(tvp, !(DOINGSOFTDEP(tvp) |
1604 DOINGASYNC(tvp)))) != 0) {
1605 (void)bwrite(bp);
1606 goto bad;
1607 }
1608 /*
1609 * Directory set up, now install its entry in the parent directory.
1610 *
1611 * If we are not doing soft dependencies, then we must write out the
1612 * buffer containing the new directory body before entering the new
1613 * name in the parent. If we are doing soft dependencies, then the
1614 * buffer containing the new directory body will be passed to and
1615 * released in the soft dependency code after the code has attached
1616 * an appropriate ordering dependency to the buffer which ensures that
1617 * the buffer is written before the new name is written in the parent.
1618 */
1619 if (DOINGASYNC(dvp))
1620 bdwrite(bp);
1621 else if (!DOINGSOFTDEP(dvp) && ((error = bwrite(bp))))
1622 goto bad;
1623 ufs_makedirentry(ip, cnp, &newdir);
1624 error = ufs_direnter(dvp, tvp, &newdir, cnp, bp);
1625
1626 bad:
1627 if (error == 0) {
1628 VN_KNOTE_UNLOCKED(dvp, NOTE_WRITE | NOTE_LINK);
1629 *ap->a_vpp = tvp;
1630 } else {
1631 dp->i_effnlink--;
1632 dp->i_nlink--;
1633 DIP_SET(dp, i_nlink, dp->i_nlink);
1634 dp->i_flag |= IN_CHANGE;
1635 if (DOINGSOFTDEP(dvp))
1636 softdep_change_linkcnt(dp);
1637 /*
1638 * No need to do an explicit VOP_TRUNCATE here, vrele will
1639 * do this for us because we set the link count to 0.
1640 */
1641 ip->i_effnlink = 0;
1642 ip->i_nlink = 0;
1643 DIP_SET(ip, i_nlink, 0);
1644 ip->i_flag |= IN_CHANGE;
1645 if (DOINGSOFTDEP(tvp))
1646 softdep_change_linkcnt(ip);
1647 vput(tvp);
1648 }
1649 out:
1650 return (error);
1651 }
1652
1653 /*
1654 * Rmdir system call.
1655 */
1656 static int
1657 ufs_rmdir(ap)
1658 struct vop_rmdir_args /* {
1659 struct vnode *a_dvp;
1660 struct vnode *a_vp;
1661 struct componentname *a_cnp;
1662 } */ *ap;
1663 {
1664 struct vnode *vp = ap->a_vp;
1665 struct vnode *dvp = ap->a_dvp;
1666 struct componentname *cnp = ap->a_cnp;
1667 struct inode *ip, *dp;
1668 int error, ioflag;
1669
1670 ip = VTOI(vp);
1671 dp = VTOI(dvp);
1672
1673 /*
1674 * Do not remove a directory that is in the process of being renamed.
1675 * Verify the directory is empty (and valid). Rmdir ".." will not be
1676 * valid since ".." will contain a reference to the current directory
1677 * and thus be non-empty. Do not allow the removal of mounted on
1678 * directories (this can happen when an NFS exported filesystem
1679 * tries to remove a locally mounted on directory).
1680 */
1681 error = 0;
1682 if (ip->i_flag & IN_RENAME) {
1683 error = EINVAL;
1684 goto out;
1685 }
1686 if (ip->i_effnlink != 2 ||
1687 !ufs_dirempty(ip, dp->i_number, cnp->cn_cred)) {
1688 error = ENOTEMPTY;
1689 goto out;
1690 }
1691 if ((dp->i_flags & APPEND)
1692 || (ip->i_flags & (NOUNLINK | IMMUTABLE | APPEND))) {
1693 error = EPERM;
1694 goto out;
1695 }
1696 if (vp->v_mountedhere != 0) {
1697 error = EINVAL;
1698 goto out;
1699 }
1700 /*
1701 * Delete reference to directory before purging
1702 * inode. If we crash in between, the directory
1703 * will be reattached to lost+found,
1704 */
1705 dp->i_effnlink--;
1706 ip->i_effnlink--;
1707 if (DOINGSOFTDEP(vp)) {
1708 softdep_change_linkcnt(dp);
1709 softdep_change_linkcnt(ip);
1710 }
1711 error = ufs_dirremove(dvp, ip, cnp->cn_flags, 1);
1712 if (error) {
1713 dp->i_effnlink++;
1714 ip->i_effnlink++;
1715 if (DOINGSOFTDEP(vp)) {
1716 softdep_change_linkcnt(dp);
1717 softdep_change_linkcnt(ip);
1718 }
1719 goto out;
1720 }
1721 VN_KNOTE_UNLOCKED(dvp, NOTE_WRITE | NOTE_LINK);
1722 cache_purge(dvp);
1723 /*
1724 * Truncate inode. The only stuff left in the directory is "." and
1725 * "..". The "." reference is inconsequential since we are quashing
1726 * it. The soft dependency code will arrange to do these operations
1727 * after the parent directory entry has been deleted on disk, so
1728 * when running with that code we avoid doing them now.
1729 */
1730 if (!DOINGSOFTDEP(vp)) {
1731 dp->i_nlink--;
1732 DIP_SET(dp, i_nlink, dp->i_nlink);
1733 dp->i_flag |= IN_CHANGE;
1734 ip->i_nlink--;
1735 DIP_SET(ip, i_nlink, ip->i_nlink);
1736 ip->i_flag |= IN_CHANGE;
1737 ioflag = IO_NORMAL;
1738 if (DOINGASYNC(vp))
1739 ioflag |= IO_SYNC;
1740 error = UFS_TRUNCATE(vp, (off_t)0, ioflag, cnp->cn_cred,
1741 cnp->cn_thread);
1742 }
1743 cache_purge(vp);
1744 #ifdef UFS_DIRHASH
1745 /* Kill any active hash; i_effnlink == 0, so it will not come back. */
1746 if (ip->i_dirhash != NULL)
1747 ufsdirhash_free(ip);
1748 #endif
1749 out:
1750 VN_KNOTE_UNLOCKED(vp, NOTE_DELETE);
1751 return (error);
1752 }
1753
1754 /*
1755 * symlink -- make a symbolic link
1756 */
1757 static int
1758 ufs_symlink(ap)
1759 struct vop_symlink_args /* {
1760 struct vnode *a_dvp;
1761 struct vnode **a_vpp;
1762 struct componentname *a_cnp;
1763 struct vattr *a_vap;
1764 char *a_target;
1765 } */ *ap;
1766 {
1767 struct vnode *vp, **vpp = ap->a_vpp;
1768 struct inode *ip;
1769 int len, error;
1770
1771 error = ufs_makeinode(IFLNK | ap->a_vap->va_mode, ap->a_dvp,
1772 vpp, ap->a_cnp);
1773 if (error)
1774 return (error);
1775 VN_KNOTE_UNLOCKED(ap->a_dvp, NOTE_WRITE);
1776 vp = *vpp;
1777 len = strlen(ap->a_target);
1778 if (len < vp->v_mount->mnt_maxsymlinklen) {
1779 ip = VTOI(vp);
1780 bcopy(ap->a_target, SHORTLINK(ip), len);
1781 ip->i_size = len;
1782 DIP_SET(ip, i_size, len);
1783 ip->i_flag |= IN_CHANGE | IN_UPDATE;
1784 } else
1785 error = vn_rdwr(UIO_WRITE, vp, ap->a_target, len, (off_t)0,
1786 UIO_SYSSPACE, IO_NODELOCKED | IO_NOMACCHECK,
1787 ap->a_cnp->cn_cred, NOCRED, (int *)0, (struct thread *)0);
1788 if (error)
1789 vput(vp);
1790 return (error);
1791 }
1792
1793 /*
1794 * Vnode op for reading directories.
1795 *
1796 * The routine below assumes that the on-disk format of a directory
1797 * is the same as that defined by <sys/dirent.h>. If the on-disk
1798 * format changes, then it will be necessary to do a conversion
1799 * from the on-disk format that read returns to the format defined
1800 * by <sys/dirent.h>.
1801 */
1802 int
1803 ufs_readdir(ap)
1804 struct vop_readdir_args /* {
1805 struct vnode *a_vp;
1806 struct uio *a_uio;
1807 struct ucred *a_cred;
1808 int *a_eofflag;
1809 int *ncookies;
1810 u_long **a_cookies;
1811 } */ *ap;
1812 {
1813 struct uio *uio = ap->a_uio;
1814 int error;
1815 size_t count, lost;
1816 off_t off;
1817
1818 if (ap->a_ncookies != NULL)
1819 /*
1820 * Ensure that the block is aligned. The caller can use
1821 * the cookies to determine where in the block to start.
1822 */
1823 uio->uio_offset &= ~(DIRBLKSIZ - 1);
1824 off = uio->uio_offset;
1825 count = uio->uio_resid;
1826 /* Make sure we don't return partial entries. */
1827 if (count <= ((uio->uio_offset + count) & (DIRBLKSIZ -1)))
1828 return (EINVAL);
1829 count -= (uio->uio_offset + count) & (DIRBLKSIZ -1);
1830 lost = uio->uio_resid - count;
1831 uio->uio_resid = count;
1832 uio->uio_iov->iov_len = count;
1833 # if (BYTE_ORDER == LITTLE_ENDIAN)
1834 if (ap->a_vp->v_mount->mnt_maxsymlinklen > 0) {
1835 error = VOP_READ(ap->a_vp, uio, 0, ap->a_cred);
1836 } else {
1837 struct dirent *dp, *edp;
1838 struct uio auio;
1839 struct iovec aiov;
1840 caddr_t dirbuf;
1841 int readcnt;
1842 u_char tmp;
1843
1844 auio = *uio;
1845 auio.uio_iov = &aiov;
1846 auio.uio_iovcnt = 1;
1847 auio.uio_segflg = UIO_SYSSPACE;
1848 aiov.iov_len = count;
1849 MALLOC(dirbuf, caddr_t, count, M_TEMP, M_WAITOK);
1850 aiov.iov_base = dirbuf;
1851 error = VOP_READ(ap->a_vp, &auio, 0, ap->a_cred);
1852 if (error == 0) {
1853 readcnt = count - auio.uio_resid;
1854 edp = (struct dirent *)&dirbuf[readcnt];
1855 for (dp = (struct dirent *)dirbuf; dp < edp; ) {
1856 tmp = dp->d_namlen;
1857 dp->d_namlen = dp->d_type;
1858 dp->d_type = tmp;
1859 if (dp->d_reclen > 0) {
1860 dp = (struct dirent *)
1861 ((char *)dp + dp->d_reclen);
1862 } else {
1863 error = EIO;
1864 break;
1865 }
1866 }
1867 if (dp >= edp)
1868 error = uiomove(dirbuf, readcnt, uio);
1869 }
1870 FREE(dirbuf, M_TEMP);
1871 }
1872 # else
1873 error = VOP_READ(ap->a_vp, uio, 0, ap->a_cred);
1874 # endif
1875 if (!error && ap->a_ncookies != NULL) {
1876 struct dirent* dpStart;
1877 struct dirent* dpEnd;
1878 struct dirent* dp;
1879 int ncookies;
1880 u_long *cookies;
1881 u_long *cookiep;
1882
1883 if (uio->uio_segflg != UIO_SYSSPACE || uio->uio_iovcnt != 1)
1884 panic("ufs_readdir: unexpected uio from NFS server");
1885 dpStart = (struct dirent *)
1886 ((char *)uio->uio_iov->iov_base - (uio->uio_offset - off));
1887 dpEnd = (struct dirent *) uio->uio_iov->iov_base;
1888 for (dp = dpStart, ncookies = 0;
1889 dp < dpEnd;
1890 dp = (struct dirent *)((caddr_t) dp + dp->d_reclen))
1891 ncookies++;
1892 MALLOC(cookies, u_long *, ncookies * sizeof(u_long), M_TEMP,
1893 M_WAITOK);
1894 for (dp = dpStart, cookiep = cookies;
1895 dp < dpEnd;
1896 dp = (struct dirent *)((caddr_t) dp + dp->d_reclen)) {
1897 off += dp->d_reclen;
1898 *cookiep++ = (u_long) off;
1899 }
1900 *ap->a_ncookies = ncookies;
1901 *ap->a_cookies = cookies;
1902 }
1903 uio->uio_resid += lost;
1904 if (ap->a_eofflag)
1905 *ap->a_eofflag = VTOI(ap->a_vp)->i_size <= uio->uio_offset;
1906 return (error);
1907 }
1908
1909 /*
1910 * Return target name of a symbolic link
1911 */
1912 static int
1913 ufs_readlink(ap)
1914 struct vop_readlink_args /* {
1915 struct vnode *a_vp;
1916 struct uio *a_uio;
1917 struct ucred *a_cred;
1918 } */ *ap;
1919 {
1920 struct vnode *vp = ap->a_vp;
1921 struct inode *ip = VTOI(vp);
1922 doff_t isize;
1923
1924 isize = ip->i_size;
1925 if ((isize < vp->v_mount->mnt_maxsymlinklen) ||
1926 DIP(ip, i_blocks) == 0) { /* XXX - for old fastlink support */
1927 uiomove(SHORTLINK(ip), isize, ap->a_uio);
1928 return (0);
1929 }
1930 return (VOP_READ(vp, ap->a_uio, 0, ap->a_cred));
1931 }
1932
1933 /*
1934 * Calculate the logical to physical mapping if not done already,
1935 * then call the device strategy routine.
1936 *
1937 * In order to be able to swap to a file, the ufs_bmaparray() operation may not
1938 * deadlock on memory. See ufs_bmap() for details.
1939 */
1940 static int
1941 ufs_strategy(ap)
1942 struct vop_strategy_args /* {
1943 struct vnode *a_vp;
1944 struct buf *a_bp;
1945 } */ *ap;
1946 {
1947 struct buf *bp = ap->a_bp;
1948 struct vnode *vp = ap->a_vp;
1949 struct inode *ip;
1950 ufs2_daddr_t blkno;
1951 int error;
1952
1953 KASSERT(ap->a_vp == ap->a_bp->b_vp, ("%s(%p != %p)",
1954 __func__, ap->a_vp, ap->a_bp->b_vp));
1955 ip = VTOI(vp);
1956 if (bp->b_blkno == bp->b_lblkno) {
1957 error = ufs_bmaparray(vp, bp->b_lblkno, &blkno, bp, NULL, NULL);
1958 bp->b_blkno = blkno;
1959 if (error) {
1960 bp->b_error = error;
1961 bp->b_ioflags |= BIO_ERROR;
1962 bufdone(bp);
1963 return (error);
1964 }
1965 if ((long)bp->b_blkno == -1)
1966 vfs_bio_clrbuf(bp);
1967 }
1968 if ((long)bp->b_blkno == -1) {
1969 bufdone(bp);
1970 return (0);
1971 }
1972 vp = ip->i_devvp;
1973 bp->b_dev = vp->v_rdev;
1974 bp->b_iooffset = dbtob(bp->b_blkno);
1975 if (!buf_prewrite(vp, bp))
1976 VOP_SPECSTRATEGY(vp, bp);
1977 return (0);
1978 }
1979
1980 /*
1981 * Snapshots require all lock requests to be exclusive.
1982 */
1983 static int
1984 ufs_lock(ap)
1985 struct vop_lock_args /* {
1986 struct vnode *a_vp;
1987 int a_flags;
1988 struct thread *a_td;
1989 } */ *ap;
1990 {
1991 struct vnode *vp = ap->a_vp;
1992 int flags = ap->a_flags;
1993
1994 if ((VTOI(vp)->i_flags & SF_SNAPSHOT) &&
1995 ((flags & LK_TYPE_MASK) == LK_SHARED)) {
1996 flags &= ~LK_TYPE_MASK;
1997 flags |= LK_EXCLUSIVE;
1998 }
1999 #ifndef DEBUG_LOCKS
2000 return (lockmgr(vp->v_vnlock, flags, VI_MTX(vp), ap->a_td));
2001 #else
2002 return (debuglockmgr(vp->v_vnlock, flags, VI_MTX(vp),
2003 ap->a_td, "vop_stdlock", vp->filename, vp->line));
2004 #endif
2005 }
2006
2007 /*
2008 * Print out the contents of an inode.
2009 */
2010 static int
2011 ufs_print(ap)
2012 struct vop_print_args /* {
2013 struct vnode *a_vp;
2014 } */ *ap;
2015 {
2016 struct vnode *vp = ap->a_vp;
2017 struct inode *ip = VTOI(vp);
2018
2019 printf("\tino %lu, on dev %s (%d, %d)", (u_long)ip->i_number,
2020 devtoname(ip->i_dev), major(ip->i_dev), minor(ip->i_dev));
2021 if (vp->v_type == VFIFO)
2022 fifo_printinfo(vp);
2023 printf("\n");
2024 return (0);
2025 }
2026
2027 /*
2028 * Read wrapper for special devices.
2029 */
2030 static int
2031 ufsspec_read(ap)
2032 struct vop_read_args /* {
2033 struct vnode *a_vp;
2034 struct uio *a_uio;
2035 int a_ioflag;
2036 struct ucred *a_cred;
2037 } */ *ap;
2038 {
2039 int error, resid;
2040 struct inode *ip;
2041 struct uio *uio;
2042
2043 uio = ap->a_uio;
2044 resid = uio->uio_resid;
2045 error = VOCALL(spec_vnodeop_p, VOFFSET(vop_read), ap);
2046 /*
2047 * The inode may have been revoked during the call, so it must not
2048 * be accessed blindly here or in the other wrapper functions.
2049 */
2050 ip = VTOI(ap->a_vp);
2051 if (ip != NULL && (uio->uio_resid != resid || (error == 0 && resid != 0)))
2052 ip->i_flag |= IN_ACCESS;
2053 return (error);
2054 }
2055
2056 /*
2057 * Write wrapper for special devices.
2058 */
2059 static int
2060 ufsspec_write(ap)
2061 struct vop_write_args /* {
2062 struct vnode *a_vp;
2063 struct uio *a_uio;
2064 int a_ioflag;
2065 struct ucred *a_cred;
2066 } */ *ap;
2067 {
2068 int error, resid;
2069 struct inode *ip;
2070 struct uio *uio;
2071
2072 uio = ap->a_uio;
2073 resid = uio->uio_resid;
2074 error = VOCALL(spec_vnodeop_p, VOFFSET(vop_write), ap);
2075 ip = VTOI(ap->a_vp);
2076 if (ip != NULL && (uio->uio_resid != resid || (error == 0 && resid != 0)))
2077 VTOI(ap->a_vp)->i_flag |= IN_CHANGE | IN_UPDATE;
2078 return (error);
2079 }
2080
2081 /*
2082 * Close wrapper for special devices.
2083 *
2084 * Update the times on the inode then do device close.
2085 */
2086 static int
2087 ufsspec_close(ap)
2088 struct vop_close_args /* {
2089 struct vnode *a_vp;
2090 int a_fflag;
2091 struct ucred *a_cred;
2092 struct thread *a_td;
2093 } */ *ap;
2094 {
2095 struct vnode *vp = ap->a_vp;
2096
2097 VI_LOCK(vp);
2098 if (vp->v_usecount > 1)
2099 ufs_itimes(vp);
2100 VI_UNLOCK(vp);
2101 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_close), ap));
2102 }
2103
2104 /*
2105 * Read wrapper for fifos.
2106 */
2107 static int
2108 ufsfifo_read(ap)
2109 struct vop_read_args /* {
2110 struct vnode *a_vp;
2111 struct uio *a_uio;
2112 int a_ioflag;
2113 struct ucred *a_cred;
2114 } */ *ap;
2115 {
2116 int error, resid;
2117 struct inode *ip;
2118 struct uio *uio;
2119
2120 uio = ap->a_uio;
2121 resid = uio->uio_resid;
2122 error = VOCALL(fifo_vnodeop_p, VOFFSET(vop_read), ap);
2123 ip = VTOI(ap->a_vp);
2124 if ((ap->a_vp->v_mount->mnt_flag & MNT_NOATIME) == 0 && ip != NULL &&
2125 (uio->uio_resid != resid || (error == 0 && resid != 0)))
2126 ip->i_flag |= IN_ACCESS;
2127 return (error);
2128 }
2129
2130 /*
2131 * Write wrapper for fifos.
2132 */
2133 static int
2134 ufsfifo_write(ap)
2135 struct vop_write_args /* {
2136 struct vnode *a_vp;
2137 struct uio *a_uio;
2138 int a_ioflag;
2139 struct ucred *a_cred;
2140 } */ *ap;
2141 {
2142 int error, resid;
2143 struct inode *ip;
2144 struct uio *uio;
2145
2146 uio = ap->a_uio;
2147 resid = uio->uio_resid;
2148 error = VOCALL(fifo_vnodeop_p, VOFFSET(vop_write), ap);
2149 ip = VTOI(ap->a_vp);
2150 if (ip != NULL && (uio->uio_resid != resid || (error == 0 && resid != 0)))
2151 ip->i_flag |= IN_CHANGE | IN_UPDATE;
2152 return (error);
2153 }
2154
2155 /*
2156 * Close wrapper for fifos.
2157 *
2158 * Update the times on the inode then do device close.
2159 */
2160 static int
2161 ufsfifo_close(ap)
2162 struct vop_close_args /* {
2163 struct vnode *a_vp;
2164 int a_fflag;
2165 struct ucred *a_cred;
2166 struct thread *a_td;
2167 } */ *ap;
2168 {
2169 struct vnode *vp = ap->a_vp;
2170
2171 VI_LOCK(vp);
2172 if (vp->v_usecount > 1)
2173 ufs_itimes(vp);
2174 VI_UNLOCK(vp);
2175 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_close), ap));
2176 }
2177
2178 /*
2179 * Kqfilter wrapper for fifos.
2180 *
2181 * Fall through to ufs kqfilter routines if needed
2182 */
2183 static int
2184 ufsfifo_kqfilter(ap)
2185 struct vop_kqfilter_args *ap;
2186 {
2187 int error;
2188
2189 error = VOCALL(fifo_vnodeop_p, VOFFSET(vop_kqfilter), ap);
2190 if (error)
2191 error = ufs_kqfilter(ap);
2192 return (error);
2193 }
2194
2195 /*
2196 * Return POSIX pathconf information applicable to ufs filesystems.
2197 */
2198 static int
2199 ufs_pathconf(ap)
2200 struct vop_pathconf_args /* {
2201 struct vnode *a_vp;
2202 int a_name;
2203 int *a_retval;
2204 } */ *ap;
2205 {
2206 int error;
2207
2208 error = 0;
2209 switch (ap->a_name) {
2210 case _PC_LINK_MAX:
2211 *ap->a_retval = LINK_MAX;
2212 break;
2213 case _PC_NAME_MAX:
2214 *ap->a_retval = NAME_MAX;
2215 break;
2216 case _PC_PATH_MAX:
2217 *ap->a_retval = PATH_MAX;
2218 break;
2219 case _PC_PIPE_BUF:
2220 *ap->a_retval = PIPE_BUF;
2221 break;
2222 case _PC_CHOWN_RESTRICTED:
2223 *ap->a_retval = 1;
2224 break;
2225 case _PC_NO_TRUNC:
2226 *ap->a_retval = 1;
2227 break;
2228 case _PC_ACL_EXTENDED:
2229 #ifdef UFS_ACL
2230 if (ap->a_vp->v_mount->mnt_flag & MNT_ACLS)
2231 *ap->a_retval = 1;
2232 else
2233 *ap->a_retval = 0;
2234 #else
2235 *ap->a_retval = 0;
2236 #endif
2237 break;
2238 case _PC_ACL_PATH_MAX:
2239 #ifdef UFS_ACL
2240 if (ap->a_vp->v_mount->mnt_flag & MNT_ACLS)
2241 *ap->a_retval = ACL_MAX_ENTRIES;
2242 else
2243 *ap->a_retval = 3;
2244 #else
2245 *ap->a_retval = 3;
2246 #endif
2247 break;
2248 case _PC_MAC_PRESENT:
2249 #ifdef MAC
2250 if (ap->a_vp->v_mount->mnt_flag & MNT_MULTILABEL)
2251 *ap->a_retval = 1;
2252 else
2253 *ap->a_retval = 0;
2254 #else
2255 *ap->a_retval = 0;
2256 #endif
2257 break;
2258 case _PC_ASYNC_IO:
2259 /* _PC_ASYNC_IO should have been handled by upper layers. */
2260 KASSERT(0, ("_PC_ASYNC_IO should not get here"));
2261 error = EINVAL;
2262 break;
2263 case _PC_PRIO_IO:
2264 *ap->a_retval = 0;
2265 break;
2266 case _PC_SYNC_IO:
2267 *ap->a_retval = 0;
2268 break;
2269 case _PC_ALLOC_SIZE_MIN:
2270 *ap->a_retval = ap->a_vp->v_mount->mnt_stat.f_bsize;
2271 break;
2272 case _PC_FILESIZEBITS:
2273 *ap->a_retval = 64;
2274 break;
2275 case _PC_REC_INCR_XFER_SIZE:
2276 *ap->a_retval = ap->a_vp->v_mount->mnt_stat.f_iosize;
2277 break;
2278 case _PC_REC_MAX_XFER_SIZE:
2279 *ap->a_retval = -1; /* means ``unlimited'' */
2280 break;
2281 case _PC_REC_MIN_XFER_SIZE:
2282 *ap->a_retval = ap->a_vp->v_mount->mnt_stat.f_iosize;
2283 break;
2284 case _PC_REC_XFER_ALIGN:
2285 *ap->a_retval = PAGE_SIZE;
2286 break;
2287 case _PC_SYMLINK_MAX:
2288 *ap->a_retval = MAXPATHLEN;
2289 break;
2290
2291 default:
2292 error = EINVAL;
2293 break;
2294 }
2295 return (error);
2296 }
2297
2298 /*
2299 * Advisory record locking support
2300 */
2301 static int
2302 ufs_advlock(ap)
2303 struct vop_advlock_args /* {
2304 struct vnode *a_vp;
2305 caddr_t a_id;
2306 int a_op;
2307 struct flock *a_fl;
2308 int a_flags;
2309 } */ *ap;
2310 {
2311 struct inode *ip = VTOI(ap->a_vp);
2312
2313 return (lf_advlock(ap, &(ip->i_lockf), ip->i_size));
2314 }
2315
2316 /*
2317 * Initialize the vnode associated with a new inode, handle aliased
2318 * vnodes.
2319 */
2320 int
2321 ufs_vinit(mntp, specops, fifoops, vpp)
2322 struct mount *mntp;
2323 vop_t **specops;
2324 vop_t **fifoops;
2325 struct vnode **vpp;
2326 {
2327 struct inode *ip;
2328 struct vnode *vp;
2329 struct timeval tv;
2330
2331 vp = *vpp;
2332 ip = VTOI(vp);
2333 switch(vp->v_type = IFTOVT(ip->i_mode)) {
2334 case VCHR:
2335 case VBLK:
2336 vp->v_op = specops;
2337 vp = addaliasu(vp, DIP(ip, i_rdev));
2338 ip->i_vnode = vp;
2339 break;
2340 case VFIFO:
2341 vp->v_op = fifoops;
2342 break;
2343 default:
2344 break;
2345
2346 }
2347 ASSERT_VOP_LOCKED(vp, "ufs_vinit");
2348 if (ip->i_number == ROOTINO)
2349 vp->v_vflag |= VV_ROOT;
2350 /*
2351 * Initialize modrev times
2352 */
2353 getmicrouptime(&tv);
2354 SETHIGH(ip->i_modrev, tv.tv_sec);
2355 SETLOW(ip->i_modrev, tv.tv_usec * 4294);
2356 *vpp = vp;
2357 return (0);
2358 }
2359
2360 /*
2361 * Allocate a new inode.
2362 * Vnode dvp must be locked.
2363 */
2364 static int
2365 ufs_makeinode(mode, dvp, vpp, cnp)
2366 int mode;
2367 struct vnode *dvp;
2368 struct vnode **vpp;
2369 struct componentname *cnp;
2370 {
2371 struct inode *ip, *pdir;
2372 struct direct newdir;
2373 struct vnode *tvp;
2374 #ifdef UFS_ACL
2375 struct acl *acl;
2376 #endif
2377 int error;
2378
2379 pdir = VTOI(dvp);
2380 #ifdef DIAGNOSTIC
2381 if ((cnp->cn_flags & HASBUF) == 0)
2382 panic("ufs_makeinode: no name");
2383 #endif
2384 *vpp = NULL;
2385 if ((mode & IFMT) == 0)
2386 mode |= IFREG;
2387
2388 error = UFS_VALLOC(dvp, mode, cnp->cn_cred, &tvp);
2389 if (error)
2390 return (error);
2391 ip = VTOI(tvp);
2392 ip->i_gid = pdir->i_gid;
2393 DIP_SET(ip, i_gid, pdir->i_gid);
2394 #ifdef SUIDDIR
2395 {
2396 #ifdef QUOTA
2397 struct ucred ucred, *ucp;
2398 ucp = cnp->cn_cred;
2399 #endif
2400 /*
2401 * If we are not the owner of the directory,
2402 * and we are hacking owners here, (only do this where told to)
2403 * and we are not giving it TO root, (would subvert quotas)
2404 * then go ahead and give it to the other user.
2405 * Note that this drops off the execute bits for security.
2406 */
2407 if ((dvp->v_mount->mnt_flag & MNT_SUIDDIR) &&
2408 (pdir->i_mode & ISUID) &&
2409 (pdir->i_uid != cnp->cn_cred->cr_uid) && pdir->i_uid) {
2410 ip->i_uid = pdir->i_uid;
2411 DIP_SET(ip, i_uid, ip->i_uid);
2412 mode &= ~07111;
2413 #ifdef QUOTA
2414 /*
2415 * Make sure the correct user gets charged
2416 * for the space.
2417 * Quickly knock up a dummy credential for the victim.
2418 * XXX This seems to never be accessed out of our
2419 * context so a stack variable is ok.
2420 */
2421 ucred.cr_ref = 1;
2422 ucred.cr_uid = ip->i_uid;
2423 ucred.cr_ngroups = 1;
2424 ucred.cr_groups[0] = pdir->i_gid;
2425 ucp = &ucred;
2426 #endif
2427 } else {
2428 ip->i_uid = cnp->cn_cred->cr_uid;
2429 DIP_SET(ip, i_uid, ip->i_uid);
2430 }
2431
2432 #ifdef QUOTA
2433 if ((error = getinoquota(ip)) ||
2434 (error = chkiq(ip, 1, ucp, 0))) {
2435 UFS_VFREE(tvp, ip->i_number, mode);
2436 vput(tvp);
2437 return (error);
2438 }
2439 #endif
2440 }
2441 #else /* !SUIDDIR */
2442 ip->i_uid = cnp->cn_cred->cr_uid;
2443 DIP_SET(ip, i_uid, ip->i_uid);
2444 #ifdef QUOTA
2445 if ((error = getinoquota(ip)) ||
2446 (error = chkiq(ip, 1, cnp->cn_cred, 0))) {
2447 UFS_VFREE(tvp, ip->i_number, mode);
2448 vput(tvp);
2449 return (error);
2450 }
2451 #endif
2452 #endif /* !SUIDDIR */
2453 ip->i_flag |= IN_ACCESS | IN_CHANGE | IN_UPDATE;
2454 #ifdef UFS_ACL
2455 acl = NULL;
2456 if ((dvp->v_mount->mnt_flag & MNT_ACLS) != 0) {
2457 MALLOC(acl, struct acl *, sizeof(*acl), M_ACL, M_WAITOK);
2458
2459 /*
2460 * Retrieve default ACL for parent, if any.
2461 */
2462 error = VOP_GETACL(dvp, ACL_TYPE_DEFAULT, acl, cnp->cn_cred,
2463 cnp->cn_thread);
2464 switch (error) {
2465 case 0:
2466 /*
2467 * Retrieved a default ACL, so merge mode and ACL if
2468 * necessary.
2469 */
2470 if (acl->acl_cnt != 0) {
2471 /*
2472 * Two possible ways for default ACL to not
2473 * be present. First, the EA can be
2474 * undefined, or second, the default ACL can
2475 * be blank. If it's blank, fall through to
2476 * the it's not defined case.
2477 */
2478 mode = acl_posix1e_newfilemode(mode, acl);
2479 ip->i_mode = mode;
2480 DIP_SET(ip, i_mode, mode);
2481 ufs_sync_acl_from_inode(ip, acl);
2482 break;
2483 }
2484 /* FALLTHROUGH */
2485
2486 case EOPNOTSUPP:
2487 /*
2488 * Just use the mode as-is.
2489 */
2490 ip->i_mode = mode;
2491 DIP_SET(ip, i_mode, mode);
2492 FREE(acl, M_ACL);
2493 acl = NULL;
2494 break;
2495
2496 default:
2497 UFS_VFREE(tvp, ip->i_number, mode);
2498 vput(tvp);
2499 FREE(acl, M_ACL);
2500 acl = NULL;
2501 return (error);
2502 }
2503 } else {
2504 #endif
2505 ip->i_mode = mode;
2506 DIP_SET(ip, i_mode, mode);
2507 #ifdef UFS_ACL
2508 }
2509 #endif
2510 tvp->v_type = IFTOVT(mode); /* Rest init'd in getnewvnode(). */
2511 ip->i_effnlink = 1;
2512 ip->i_nlink = 1;
2513 DIP_SET(ip, i_nlink, 1);
2514 if (DOINGSOFTDEP(tvp))
2515 softdep_change_linkcnt(ip);
2516 if ((ip->i_mode & ISGID) && !groupmember(ip->i_gid, cnp->cn_cred) &&
2517 suser_cred(cnp->cn_cred, SUSER_ALLOWJAIL)) {
2518 ip->i_mode &= ~ISGID;
2519 DIP_SET(ip, i_mode, ip->i_mode);
2520 }
2521
2522 if (cnp->cn_flags & ISWHITEOUT) {
2523 ip->i_flags |= UF_OPAQUE;
2524 DIP_SET(ip, i_flags, ip->i_flags);
2525 }
2526
2527 /*
2528 * Make sure inode goes to disk before directory entry.
2529 */
2530 error = UFS_UPDATE(tvp, !(DOINGSOFTDEP(tvp) | DOINGASYNC(tvp)));
2531 if (error)
2532 goto bad;
2533 #ifdef MAC
2534 if (dvp->v_mount->mnt_flag & MNT_MULTILABEL) {
2535 error = mac_create_vnode_extattr(cnp->cn_cred, dvp->v_mount,
2536 dvp, tvp, cnp);
2537 if (error)
2538 goto bad;
2539 }
2540 #endif
2541 #ifdef UFS_ACL
2542 if (acl != NULL) {
2543 /*
2544 * XXX: If we abort now, will Soft Updates notify the extattr
2545 * code that the EAs for the file need to be released?
2546 */
2547 error = VOP_SETACL(tvp, ACL_TYPE_ACCESS, acl, cnp->cn_cred,
2548 cnp->cn_thread);
2549 switch (error) {
2550 case 0:
2551 break;
2552
2553 case EOPNOTSUPP:
2554 /*
2555 * XXX: This should not happen, as EOPNOTSUPP above was
2556 * supposed to free acl.
2557 */
2558 printf("ufs_makeinode: VOP_GETACL() but no "
2559 "VOP_SETACL()\n");
2560 /* panic("ufs_makeinode: VOP_GETACL() but no "
2561 "VOP_SETACL()"); */
2562 break;
2563
2564 default:
2565 FREE(acl, M_ACL);
2566 goto bad;
2567 }
2568 FREE(acl, M_ACL);
2569 }
2570 #endif /* !UFS_ACL */
2571 ufs_makedirentry(ip, cnp, &newdir);
2572 error = ufs_direnter(dvp, tvp, &newdir, cnp, NULL);
2573 if (error)
2574 goto bad;
2575 *vpp = tvp;
2576 return (0);
2577
2578 bad:
2579 /*
2580 * Write error occurred trying to update the inode
2581 * or the directory so must deallocate the inode.
2582 */
2583 ip->i_effnlink = 0;
2584 ip->i_nlink = 0;
2585 DIP_SET(ip, i_nlink, 0);
2586 ip->i_flag |= IN_CHANGE;
2587 if (DOINGSOFTDEP(tvp))
2588 softdep_change_linkcnt(ip);
2589 vput(tvp);
2590 return (error);
2591 }
2592
2593 static struct filterops ufsread_filtops =
2594 { 1, NULL, filt_ufsdetach, filt_ufsread };
2595 static struct filterops ufswrite_filtops =
2596 { 1, NULL, filt_ufsdetach, filt_ufswrite };
2597 static struct filterops ufsvnode_filtops =
2598 { 1, NULL, filt_ufsdetach, filt_ufsvnode };
2599
2600 static int
2601 ufs_kqfilter(ap)
2602 struct vop_kqfilter_args /* {
2603 struct vnode *a_vp;
2604 struct knote *a_kn;
2605 } */ *ap;
2606 {
2607 struct vnode *vp = ap->a_vp;
2608 struct knote *kn = ap->a_kn;
2609
2610 switch (kn->kn_filter) {
2611 case EVFILT_READ:
2612 kn->kn_fop = &ufsread_filtops;
2613 break;
2614 case EVFILT_WRITE:
2615 kn->kn_fop = &ufswrite_filtops;
2616 break;
2617 case EVFILT_VNODE:
2618 kn->kn_fop = &ufsvnode_filtops;
2619 break;
2620 default:
2621 return (1);
2622 }
2623
2624 kn->kn_hook = (caddr_t)vp;
2625
2626 if (vp->v_pollinfo == NULL)
2627 v_addpollinfo(vp);
2628 if (vp->v_pollinfo == NULL)
2629 return ENOMEM;
2630 knlist_add(&vp->v_pollinfo->vpi_selinfo.si_note, kn, 0);
2631
2632 return (0);
2633 }
2634
2635 static void
2636 filt_ufsdetach(struct knote *kn)
2637 {
2638 struct vnode *vp = (struct vnode *)kn->kn_hook;
2639
2640 KASSERT(vp->v_pollinfo != NULL, ("Mising v_pollinfo"));
2641 knlist_remove(&vp->v_pollinfo->vpi_selinfo.si_note, kn, 0);
2642 }
2643
2644 /*ARGSUSED*/
2645 static int
2646 filt_ufsread(struct knote *kn, long hint)
2647 {
2648 struct vnode *vp = (struct vnode *)kn->kn_hook;
2649 struct inode *ip = VTOI(vp);
2650
2651 /*
2652 * filesystem is gone, so set the EOF flag and schedule
2653 * the knote for deletion.
2654 */
2655 if (hint == NOTE_REVOKE) {
2656 kn->kn_flags |= (EV_EOF | EV_ONESHOT);
2657 return (1);
2658 }
2659
2660 kn->kn_data = ip->i_size - kn->kn_fp->f_offset;
2661 return (kn->kn_data != 0);
2662 }
2663
2664 /*ARGSUSED*/
2665 static int
2666 filt_ufswrite(struct knote *kn, long hint)
2667 {
2668
2669 /*
2670 * filesystem is gone, so set the EOF flag and schedule
2671 * the knote for deletion.
2672 */
2673 if (hint == NOTE_REVOKE)
2674 kn->kn_flags |= (EV_EOF | EV_ONESHOT);
2675
2676 kn->kn_data = 0;
2677 return (1);
2678 }
2679
2680 static int
2681 filt_ufsvnode(struct knote *kn, long hint)
2682 {
2683
2684 if (kn->kn_sfflags & hint)
2685 kn->kn_fflags |= hint;
2686 if (hint == NOTE_REVOKE) {
2687 kn->kn_flags |= EV_EOF;
2688 return (1);
2689 }
2690 return (kn->kn_fflags != 0);
2691 }
2692
2693 /* Global vfs data structures for ufs. */
2694 static vop_t **ufs_vnodeop_p;
2695 static struct vnodeopv_entry_desc ufs_vnodeop_entries[] = {
2696 { &vop_default_desc, (vop_t *) vop_defaultop },
2697 { &vop_fsync_desc, (vop_t *) vop_panic },
2698 { &vop_read_desc, (vop_t *) vop_panic },
2699 { &vop_reallocblks_desc, (vop_t *) vop_panic },
2700 { &vop_write_desc, (vop_t *) vop_panic },
2701 { &vop_access_desc, (vop_t *) ufs_access },
2702 { &vop_advlock_desc, (vop_t *) ufs_advlock },
2703 { &vop_lock_desc, (vop_t *) ufs_lock },
2704 { &vop_bmap_desc, (vop_t *) ufs_bmap },
2705 { &vop_cachedlookup_desc, (vop_t *) ufs_lookup },
2706 { &vop_close_desc, (vop_t *) ufs_close },
2707 { &vop_create_desc, (vop_t *) ufs_create },
2708 { &vop_getattr_desc, (vop_t *) ufs_getattr },
2709 { &vop_inactive_desc, (vop_t *) ufs_inactive },
2710 { &vop_link_desc, (vop_t *) ufs_link },
2711 { &vop_lookup_desc, (vop_t *) vfs_cache_lookup },
2712 { &vop_mkdir_desc, (vop_t *) ufs_mkdir },
2713 { &vop_mknod_desc, (vop_t *) ufs_mknod },
2714 { &vop_open_desc, (vop_t *) ufs_open },
2715 { &vop_pathconf_desc, (vop_t *) ufs_pathconf },
2716 { &vop_poll_desc, (vop_t *) vop_stdpoll },
2717 { &vop_kqfilter_desc, (vop_t *) ufs_kqfilter },
2718 { &vop_getwritemount_desc, (vop_t *) vop_stdgetwritemount },
2719 { &vop_print_desc, (vop_t *) ufs_print },
2720 { &vop_readdir_desc, (vop_t *) ufs_readdir },
2721 { &vop_readlink_desc, (vop_t *) ufs_readlink },
2722 { &vop_reclaim_desc, (vop_t *) ufs_reclaim },
2723 { &vop_remove_desc, (vop_t *) ufs_remove },
2724 { &vop_rename_desc, (vop_t *) ufs_rename },
2725 { &vop_rmdir_desc, (vop_t *) ufs_rmdir },
2726 { &vop_setattr_desc, (vop_t *) ufs_setattr },
2727 #ifdef MAC
2728 { &vop_setlabel_desc, (vop_t *) vop_stdsetlabel_ea },
2729 #endif
2730 { &vop_strategy_desc, (vop_t *) ufs_strategy },
2731 { &vop_symlink_desc, (vop_t *) ufs_symlink },
2732 { &vop_whiteout_desc, (vop_t *) ufs_whiteout },
2733 #ifdef UFS_EXTATTR
2734 { &vop_getextattr_desc, (vop_t *) ufs_getextattr },
2735 { &vop_deleteextattr_desc, (vop_t *) ufs_deleteextattr },
2736 { &vop_setextattr_desc, (vop_t *) ufs_setextattr },
2737 #endif
2738 #ifdef UFS_ACL
2739 { &vop_getacl_desc, (vop_t *) ufs_getacl },
2740 { &vop_setacl_desc, (vop_t *) ufs_setacl },
2741 { &vop_aclcheck_desc, (vop_t *) ufs_aclcheck },
2742 #endif
2743 { NULL, NULL }
2744 };
2745 static struct vnodeopv_desc ufs_vnodeop_opv_desc =
2746 { &ufs_vnodeop_p, ufs_vnodeop_entries };
2747
2748 static vop_t **ufs_specop_p;
2749 static struct vnodeopv_entry_desc ufs_specop_entries[] = {
2750 { &vop_default_desc, (vop_t *) spec_vnoperate },
2751 { &vop_fsync_desc, (vop_t *) vop_panic },
2752 { &vop_access_desc, (vop_t *) ufs_access },
2753 { &vop_close_desc, (vop_t *) ufsspec_close },
2754 { &vop_getattr_desc, (vop_t *) ufs_getattr },
2755 { &vop_inactive_desc, (vop_t *) ufs_inactive },
2756 { &vop_print_desc, (vop_t *) ufs_print },
2757 { &vop_read_desc, (vop_t *) ufsspec_read },
2758 { &vop_reclaim_desc, (vop_t *) ufs_reclaim },
2759 { &vop_setattr_desc, (vop_t *) ufs_setattr },
2760 #ifdef MAC
2761 { &vop_setlabel_desc, (vop_t *) vop_stdsetlabel_ea },
2762 #endif
2763 { &vop_write_desc, (vop_t *) ufsspec_write },
2764 #ifdef UFS_EXTATTR
2765 { &vop_getextattr_desc, (vop_t *) ufs_getextattr },
2766 { &vop_deleteextattr_desc, (vop_t *) ufs_deleteextattr },
2767 { &vop_setextattr_desc, (vop_t *) ufs_setextattr },
2768 #endif
2769 #ifdef UFS_ACL
2770 { &vop_getacl_desc, (vop_t *) ufs_getacl },
2771 { &vop_setacl_desc, (vop_t *) ufs_setacl },
2772 { &vop_aclcheck_desc, (vop_t *) ufs_aclcheck },
2773 #endif
2774 {NULL, NULL}
2775 };
2776 static struct vnodeopv_desc ufs_specop_opv_desc =
2777 { &ufs_specop_p, ufs_specop_entries };
2778
2779 static vop_t **ufs_fifoop_p;
2780 static struct vnodeopv_entry_desc ufs_fifoop_entries[] = {
2781 { &vop_default_desc, (vop_t *) fifo_vnoperate },
2782 { &vop_fsync_desc, (vop_t *) vop_panic },
2783 { &vop_access_desc, (vop_t *) ufs_access },
2784 { &vop_close_desc, (vop_t *) ufsfifo_close },
2785 { &vop_getattr_desc, (vop_t *) ufs_getattr },
2786 { &vop_inactive_desc, (vop_t *) ufs_inactive },
2787 { &vop_kqfilter_desc, (vop_t *) ufsfifo_kqfilter },
2788 { &vop_print_desc, (vop_t *) ufs_print },
2789 { &vop_read_desc, (vop_t *) ufsfifo_read },
2790 { &vop_reclaim_desc, (vop_t *) ufs_reclaim },
2791 { &vop_setattr_desc, (vop_t *) ufs_setattr },
2792 #ifdef MAC
2793 { &vop_setlabel_desc, (vop_t *) vop_stdsetlabel_ea },
2794 #endif
2795 { &vop_write_desc, (vop_t *) ufsfifo_write },
2796 #ifdef UFS_EXTATTR
2797 { &vop_getextattr_desc, (vop_t *) ufs_getextattr },
2798 { &vop_deleteextattr_desc, (vop_t *) ufs_deleteextattr },
2799 { &vop_setextattr_desc, (vop_t *) ufs_setextattr },
2800 #endif
2801 #ifdef UFS_ACL
2802 { &vop_getacl_desc, (vop_t *) ufs_getacl },
2803 { &vop_setacl_desc, (vop_t *) ufs_setacl },
2804 { &vop_aclcheck_desc, (vop_t *) ufs_aclcheck },
2805 #endif
2806 { NULL, NULL }
2807 };
2808 static struct vnodeopv_desc ufs_fifoop_opv_desc =
2809 { &ufs_fifoop_p, ufs_fifoop_entries };
2810
2811 VNODEOP_SET(ufs_vnodeop_opv_desc);
2812 VNODEOP_SET(ufs_specop_opv_desc);
2813 VNODEOP_SET(ufs_fifoop_opv_desc);
2814
2815 int
2816 ufs_vnoperate(ap)
2817 struct vop_generic_args /* {
2818 struct vnodeop_desc *a_desc;
2819 } */ *ap;
2820 {
2821 return (VOCALL(ufs_vnodeop_p, ap->a_desc->vdesc_offset, ap));
2822 }
2823
2824 int
2825 ufs_vnoperatefifo(ap)
2826 struct vop_generic_args /* {
2827 struct vnodeop_desc *a_desc;
2828 } */ *ap;
2829 {
2830 return (VOCALL(ufs_fifoop_p, ap->a_desc->vdesc_offset, ap));
2831 }
2832
2833 int
2834 ufs_vnoperatespec(ap)
2835 struct vop_generic_args /* {
2836 struct vnodeop_desc *a_desc;
2837 } */ *ap;
2838 {
2839 return (VOCALL(ufs_specop_p, ap->a_desc->vdesc_offset, ap));
2840 }
Cache object: e40d62ca1703707e9fdcd55748549ad7
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