ffs_vfsops.c revision 1.278.2.6 1 /* $NetBSD: ffs_vfsops.c,v 1.278.2.6 2014/08/20 00:04:44 tls Exp $ */
2
3 /*-
4 * Copyright (c) 2008, 2009 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Wasabi Systems, Inc, and by Andrew Doran.
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 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32 /*
33 * Copyright (c) 1989, 1991, 1993, 1994
34 * The Regents of the University of California. All rights reserved.
35 *
36 * Redistribution and use in source and binary forms, with or without
37 * modification, are permitted provided that the following conditions
38 * are met:
39 * 1. Redistributions of source code must retain the above copyright
40 * notice, this list of conditions and the following disclaimer.
41 * 2. Redistributions in binary form must reproduce the above copyright
42 * notice, this list of conditions and the following disclaimer in the
43 * documentation and/or other materials provided with the distribution.
44 * 3. Neither the name of the University nor the names of its contributors
45 * may be used to endorse or promote products derived from this software
46 * without specific prior written permission.
47 *
48 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
49 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
50 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
51 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
52 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
53 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
54 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
55 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
56 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
57 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
58 * SUCH DAMAGE.
59 *
60 * @(#)ffs_vfsops.c 8.31 (Berkeley) 5/20/95
61 */
62
63 #include <sys/cdefs.h>
64 __KERNEL_RCSID(0, "$NetBSD: ffs_vfsops.c,v 1.278.2.6 2014/08/20 00:04:44 tls Exp $");
65
66 #if defined(_KERNEL_OPT)
67 #include "opt_ffs.h"
68 #include "opt_quota.h"
69 #include "opt_wapbl.h"
70 #endif
71
72 #include <sys/param.h>
73 #include <sys/systm.h>
74 #include <sys/namei.h>
75 #include <sys/proc.h>
76 #include <sys/kernel.h>
77 #include <sys/vnode.h>
78 #include <sys/socket.h>
79 #include <sys/mount.h>
80 #include <sys/buf.h>
81 #include <sys/device.h>
82 #include <sys/disk.h>
83 #include <sys/mbuf.h>
84 #include <sys/file.h>
85 #include <sys/disklabel.h>
86 #include <sys/ioctl.h>
87 #include <sys/errno.h>
88 #include <sys/kmem.h>
89 #include <sys/pool.h>
90 #include <sys/lock.h>
91 #include <sys/sysctl.h>
92 #include <sys/conf.h>
93 #include <sys/kauth.h>
94 #include <sys/wapbl.h>
95 #include <sys/fstrans.h>
96 #include <sys/module.h>
97
98 #include <miscfs/genfs/genfs.h>
99 #include <miscfs/specfs/specdev.h>
100
101 #include <ufs/ufs/quota.h>
102 #include <ufs/ufs/ufsmount.h>
103 #include <ufs/ufs/inode.h>
104 #include <ufs/ufs/dir.h>
105 #include <ufs/ufs/ufs_extern.h>
106 #include <ufs/ufs/ufs_bswap.h>
107 #include <ufs/ufs/ufs_wapbl.h>
108
109 #include <ufs/ffs/fs.h>
110 #include <ufs/ffs/ffs_extern.h>
111
112 MODULE(MODULE_CLASS_VFS, ffs, NULL);
113
114 static int ffs_vfs_fsync(vnode_t *, int);
115
116 static struct sysctllog *ffs_sysctl_log;
117
118 static kauth_listener_t ffs_snapshot_listener;
119
120 /* how many times ffs_init() was called */
121 int ffs_initcount = 0;
122
123 extern const struct vnodeopv_desc ffs_vnodeop_opv_desc;
124 extern const struct vnodeopv_desc ffs_specop_opv_desc;
125 extern const struct vnodeopv_desc ffs_fifoop_opv_desc;
126
127 const struct vnodeopv_desc * const ffs_vnodeopv_descs[] = {
128 &ffs_vnodeop_opv_desc,
129 &ffs_specop_opv_desc,
130 &ffs_fifoop_opv_desc,
131 NULL,
132 };
133
134 struct vfsops ffs_vfsops = {
135 .vfs_name = MOUNT_FFS,
136 .vfs_min_mount_data = sizeof (struct ufs_args),
137 .vfs_mount = ffs_mount,
138 .vfs_start = ufs_start,
139 .vfs_unmount = ffs_unmount,
140 .vfs_root = ufs_root,
141 .vfs_quotactl = ufs_quotactl,
142 .vfs_statvfs = ffs_statvfs,
143 .vfs_sync = ffs_sync,
144 .vfs_vget = ufs_vget,
145 .vfs_loadvnode = ffs_loadvnode,
146 .vfs_fhtovp = ffs_fhtovp,
147 .vfs_vptofh = ffs_vptofh,
148 .vfs_init = ffs_init,
149 .vfs_reinit = ffs_reinit,
150 .vfs_done = ffs_done,
151 .vfs_mountroot = ffs_mountroot,
152 .vfs_snapshot = ffs_snapshot,
153 .vfs_extattrctl = ffs_extattrctl,
154 .vfs_suspendctl = ffs_suspendctl,
155 .vfs_renamelock_enter = genfs_renamelock_enter,
156 .vfs_renamelock_exit = genfs_renamelock_exit,
157 .vfs_fsync = ffs_vfs_fsync,
158 .vfs_opv_descs = ffs_vnodeopv_descs
159 };
160
161 static const struct genfs_ops ffs_genfsops = {
162 .gop_size = ffs_gop_size,
163 .gop_alloc = ufs_gop_alloc,
164 .gop_write = genfs_gop_write,
165 .gop_markupdate = ufs_gop_markupdate,
166 };
167
168 static const struct ufs_ops ffs_ufsops = {
169 .uo_itimes = ffs_itimes,
170 .uo_update = ffs_update,
171 .uo_truncate = ffs_truncate,
172 .uo_valloc = ffs_valloc,
173 .uo_vfree = ffs_vfree,
174 .uo_balloc = ffs_balloc,
175 .uo_snapgone = ffs_snapgone,
176 };
177
178 static int
179 ffs_snapshot_cb(kauth_cred_t cred, kauth_action_t action, void *cookie,
180 void *arg0, void *arg1, void *arg2, void *arg3)
181 {
182 vnode_t *vp = arg2;
183 int result = KAUTH_RESULT_DEFER;;
184
185 if (action != KAUTH_SYSTEM_FS_SNAPSHOT)
186 return result;
187
188 if (VTOI(vp)->i_uid == kauth_cred_geteuid(cred))
189 result = KAUTH_RESULT_ALLOW;
190
191 return result;
192 }
193
194 static int
195 ffs_modcmd(modcmd_t cmd, void *arg)
196 {
197 int error;
198
199 #if 0
200 extern int doasyncfree;
201 #endif
202 #ifdef UFS_EXTATTR
203 extern int ufs_extattr_autocreate;
204 #endif
205 extern int ffs_log_changeopt;
206
207 switch (cmd) {
208 case MODULE_CMD_INIT:
209 error = vfs_attach(&ffs_vfsops);
210 if (error != 0)
211 break;
212
213 sysctl_createv(&ffs_sysctl_log, 0, NULL, NULL,
214 CTLFLAG_PERMANENT,
215 CTLTYPE_NODE, "ffs",
216 SYSCTL_DESCR("Berkeley Fast File System"),
217 NULL, 0, NULL, 0,
218 CTL_VFS, 1, CTL_EOL);
219 /*
220 * @@@ should we even bother with these first three?
221 */
222 sysctl_createv(&ffs_sysctl_log, 0, NULL, NULL,
223 CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
224 CTLTYPE_INT, "doclusterread", NULL,
225 sysctl_notavail, 0, NULL, 0,
226 CTL_VFS, 1, FFS_CLUSTERREAD, CTL_EOL);
227 sysctl_createv(&ffs_sysctl_log, 0, NULL, NULL,
228 CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
229 CTLTYPE_INT, "doclusterwrite", NULL,
230 sysctl_notavail, 0, NULL, 0,
231 CTL_VFS, 1, FFS_CLUSTERWRITE, CTL_EOL);
232 sysctl_createv(&ffs_sysctl_log, 0, NULL, NULL,
233 CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
234 CTLTYPE_INT, "doreallocblks", NULL,
235 sysctl_notavail, 0, NULL, 0,
236 CTL_VFS, 1, FFS_REALLOCBLKS, CTL_EOL);
237 #if 0
238 sysctl_createv(&ffs_sysctl_log, 0, NULL, NULL,
239 CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
240 CTLTYPE_INT, "doasyncfree",
241 SYSCTL_DESCR("Release dirty blocks asynchronously"),
242 NULL, 0, &doasyncfree, 0,
243 CTL_VFS, 1, FFS_ASYNCFREE, CTL_EOL);
244 #endif
245 sysctl_createv(&ffs_sysctl_log, 0, NULL, NULL,
246 CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
247 CTLTYPE_INT, "log_changeopt",
248 SYSCTL_DESCR("Log changes in optimization strategy"),
249 NULL, 0, &ffs_log_changeopt, 0,
250 CTL_VFS, 1, FFS_LOG_CHANGEOPT, CTL_EOL);
251 #ifdef UFS_EXTATTR
252 sysctl_createv(&ffs_sysctl_log, 0, NULL, NULL,
253 CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
254 CTLTYPE_INT, "extattr_autocreate",
255 SYSCTL_DESCR("Size of attribute for "
256 "backing file autocreation"),
257 NULL, 0, &ufs_extattr_autocreate, 0,
258 CTL_VFS, 1, FFS_EXTATTR_AUTOCREATE, CTL_EOL);
259
260 #endif /* UFS_EXTATTR */
261
262 ffs_snapshot_listener = kauth_listen_scope(KAUTH_SCOPE_SYSTEM,
263 ffs_snapshot_cb, NULL);
264 if (ffs_snapshot_listener == NULL)
265 printf("ffs_modcmd: can't listen on system scope.\n");
266
267 break;
268 case MODULE_CMD_FINI:
269 error = vfs_detach(&ffs_vfsops);
270 if (error != 0)
271 break;
272 sysctl_teardown(&ffs_sysctl_log);
273 if (ffs_snapshot_listener != NULL)
274 kauth_unlisten_scope(ffs_snapshot_listener);
275 break;
276 default:
277 error = ENOTTY;
278 break;
279 }
280
281 return (error);
282 }
283
284 pool_cache_t ffs_inode_cache;
285 pool_cache_t ffs_dinode1_cache;
286 pool_cache_t ffs_dinode2_cache;
287
288 static void ffs_oldfscompat_read(struct fs *, struct ufsmount *, daddr_t);
289 static void ffs_oldfscompat_write(struct fs *, struct ufsmount *);
290
291 /*
292 * Called by main() when ffs is going to be mounted as root.
293 */
294
295 int
296 ffs_mountroot(void)
297 {
298 struct fs *fs;
299 struct mount *mp;
300 struct lwp *l = curlwp; /* XXX */
301 struct ufsmount *ump;
302 int error;
303
304 if (device_class(root_device) != DV_DISK)
305 return (ENODEV);
306
307 if ((error = vfs_rootmountalloc(MOUNT_FFS, "root_device", &mp))) {
308 vrele(rootvp);
309 return (error);
310 }
311
312 /*
313 * We always need to be able to mount the root file system.
314 */
315 mp->mnt_flag |= MNT_FORCE;
316 if ((error = ffs_mountfs(rootvp, mp, l)) != 0) {
317 vfs_unbusy(mp, false, NULL);
318 vfs_destroy(mp);
319 return (error);
320 }
321 mp->mnt_flag &= ~MNT_FORCE;
322 mountlist_append(mp);
323 ump = VFSTOUFS(mp);
324 fs = ump->um_fs;
325 memset(fs->fs_fsmnt, 0, sizeof(fs->fs_fsmnt));
326 (void)copystr(mp->mnt_stat.f_mntonname, fs->fs_fsmnt, MNAMELEN - 1, 0);
327 (void)ffs_statvfs(mp, &mp->mnt_stat);
328 vfs_unbusy(mp, false, NULL);
329 setrootfstime((time_t)fs->fs_time);
330 return (0);
331 }
332
333 /*
334 * VFS Operations.
335 *
336 * mount system call
337 */
338 int
339 ffs_mount(struct mount *mp, const char *path, void *data, size_t *data_len)
340 {
341 struct lwp *l = curlwp;
342 struct vnode *devvp = NULL;
343 struct ufs_args *args = data;
344 struct ufsmount *ump = NULL;
345 struct fs *fs;
346 int error = 0, flags, update;
347 mode_t accessmode;
348
349 if (args == NULL)
350 return EINVAL;
351 if (*data_len < sizeof *args)
352 return EINVAL;
353
354 if (mp->mnt_flag & MNT_GETARGS) {
355 ump = VFSTOUFS(mp);
356 if (ump == NULL)
357 return EIO;
358 args->fspec = NULL;
359 *data_len = sizeof *args;
360 return 0;
361 }
362
363 update = mp->mnt_flag & MNT_UPDATE;
364
365 /* Check arguments */
366 if (args->fspec != NULL) {
367 /*
368 * Look up the name and verify that it's sane.
369 */
370 error = namei_simple_user(args->fspec,
371 NSM_FOLLOW_NOEMULROOT, &devvp);
372 if (error != 0)
373 return (error);
374
375 if (!update) {
376 /*
377 * Be sure this is a valid block device
378 */
379 if (devvp->v_type != VBLK)
380 error = ENOTBLK;
381 else if (bdevsw_lookup(devvp->v_rdev) == NULL)
382 error = ENXIO;
383 } else {
384 /*
385 * Be sure we're still naming the same device
386 * used for our initial mount
387 */
388 ump = VFSTOUFS(mp);
389 if (devvp != ump->um_devvp) {
390 if (devvp->v_rdev != ump->um_devvp->v_rdev)
391 error = EINVAL;
392 else {
393 vrele(devvp);
394 devvp = ump->um_devvp;
395 vref(devvp);
396 }
397 }
398 }
399 } else {
400 if (!update) {
401 /* New mounts must have a filename for the device */
402 return (EINVAL);
403 } else {
404 /* Use the extant mount */
405 ump = VFSTOUFS(mp);
406 devvp = ump->um_devvp;
407 vref(devvp);
408 }
409 }
410
411 /*
412 * If mount by non-root, then verify that user has necessary
413 * permissions on the device.
414 *
415 * Permission to update a mount is checked higher, so here we presume
416 * updating the mount is okay (for example, as far as securelevel goes)
417 * which leaves us with the normal check.
418 */
419 if (error == 0) {
420 accessmode = VREAD;
421 if (update ?
422 (mp->mnt_iflag & IMNT_WANTRDWR) != 0 :
423 (mp->mnt_flag & MNT_RDONLY) == 0)
424 accessmode |= VWRITE;
425 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
426 error = kauth_authorize_system(l->l_cred, KAUTH_SYSTEM_MOUNT,
427 KAUTH_REQ_SYSTEM_MOUNT_DEVICE, mp, devvp,
428 KAUTH_ARG(accessmode));
429 VOP_UNLOCK(devvp);
430 }
431
432 if (error) {
433 vrele(devvp);
434 return (error);
435 }
436
437 #ifdef WAPBL
438 /* WAPBL can only be enabled on a r/w mount. */
439 if ((mp->mnt_flag & MNT_RDONLY) && !(mp->mnt_iflag & IMNT_WANTRDWR)) {
440 mp->mnt_flag &= ~MNT_LOG;
441 }
442 #else /* !WAPBL */
443 mp->mnt_flag &= ~MNT_LOG;
444 #endif /* !WAPBL */
445
446 if (!update) {
447 int xflags;
448
449 if (mp->mnt_flag & MNT_RDONLY)
450 xflags = FREAD;
451 else
452 xflags = FREAD | FWRITE;
453 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
454 error = VOP_OPEN(devvp, xflags, FSCRED);
455 VOP_UNLOCK(devvp);
456 if (error)
457 goto fail;
458 error = ffs_mountfs(devvp, mp, l);
459 if (error) {
460 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
461 (void)VOP_CLOSE(devvp, xflags, NOCRED);
462 VOP_UNLOCK(devvp);
463 goto fail;
464 }
465
466 ump = VFSTOUFS(mp);
467 fs = ump->um_fs;
468 } else {
469 /*
470 * Update the mount.
471 */
472
473 /*
474 * The initial mount got a reference on this
475 * device, so drop the one obtained via
476 * namei(), above.
477 */
478 vrele(devvp);
479
480 ump = VFSTOUFS(mp);
481 fs = ump->um_fs;
482 if (fs->fs_ronly == 0 && (mp->mnt_flag & MNT_RDONLY)) {
483 /*
484 * Changing from r/w to r/o
485 */
486 flags = WRITECLOSE;
487 if (mp->mnt_flag & MNT_FORCE)
488 flags |= FORCECLOSE;
489 error = ffs_flushfiles(mp, flags, l);
490 if (error == 0)
491 error = UFS_WAPBL_BEGIN(mp);
492 if (error == 0 &&
493 ffs_cgupdate(ump, MNT_WAIT) == 0 &&
494 fs->fs_clean & FS_WASCLEAN) {
495 if (mp->mnt_flag & MNT_SOFTDEP)
496 fs->fs_flags &= ~FS_DOSOFTDEP;
497 fs->fs_clean = FS_ISCLEAN;
498 (void) ffs_sbupdate(ump, MNT_WAIT);
499 }
500 if (error == 0)
501 UFS_WAPBL_END(mp);
502 if (error)
503 return (error);
504 }
505
506 #ifdef WAPBL
507 if ((mp->mnt_flag & MNT_LOG) == 0) {
508 error = ffs_wapbl_stop(mp, mp->mnt_flag & MNT_FORCE);
509 if (error)
510 return error;
511 }
512 #endif /* WAPBL */
513
514 if (fs->fs_ronly == 0 && (mp->mnt_flag & MNT_RDONLY)) {
515 /*
516 * Finish change from r/w to r/o
517 */
518 fs->fs_ronly = 1;
519 fs->fs_fmod = 0;
520 }
521
522 if (mp->mnt_flag & MNT_RELOAD) {
523 error = ffs_reload(mp, l->l_cred, l);
524 if (error)
525 return (error);
526 }
527
528 if (fs->fs_ronly && (mp->mnt_iflag & IMNT_WANTRDWR)) {
529 /*
530 * Changing from read-only to read/write
531 */
532 #ifndef QUOTA2
533 if (fs->fs_flags & FS_DOQUOTA2) {
534 ump->um_flags |= UFS_QUOTA2;
535 uprintf("%s: options QUOTA2 not enabled%s\n",
536 mp->mnt_stat.f_mntonname,
537 (mp->mnt_flag & MNT_FORCE) ? "" :
538 ", not mounting");
539 return EINVAL;
540 }
541 #endif
542 fs->fs_ronly = 0;
543 fs->fs_clean <<= 1;
544 fs->fs_fmod = 1;
545 #ifdef WAPBL
546 if (fs->fs_flags & FS_DOWAPBL) {
547 printf("%s: replaying log to disk\n",
548 mp->mnt_stat.f_mntonname);
549 KDASSERT(mp->mnt_wapbl_replay);
550 error = wapbl_replay_write(mp->mnt_wapbl_replay,
551 devvp);
552 if (error) {
553 return error;
554 }
555 wapbl_replay_stop(mp->mnt_wapbl_replay);
556 fs->fs_clean = FS_WASCLEAN;
557 }
558 #endif /* WAPBL */
559 if (fs->fs_snapinum[0] != 0)
560 ffs_snapshot_mount(mp);
561 }
562
563 #ifdef WAPBL
564 error = ffs_wapbl_start(mp);
565 if (error)
566 return error;
567 #endif /* WAPBL */
568
569 #ifdef QUOTA2
570 if (!fs->fs_ronly) {
571 error = ffs_quota2_mount(mp);
572 if (error) {
573 return error;
574 }
575 }
576 #endif
577
578 if ((mp->mnt_flag & MNT_DISCARD) && !(ump->um_discarddata))
579 ump->um_discarddata = ffs_discard_init(devvp, fs);
580
581 if (args->fspec == NULL)
582 return 0;
583 }
584
585 error = set_statvfs_info(path, UIO_USERSPACE, args->fspec,
586 UIO_USERSPACE, mp->mnt_op->vfs_name, mp, l);
587 if (error == 0)
588 (void)strncpy(fs->fs_fsmnt, mp->mnt_stat.f_mntonname,
589 sizeof(fs->fs_fsmnt));
590 fs->fs_flags &= ~FS_DOSOFTDEP;
591 if (fs->fs_fmod != 0) { /* XXX */
592 int err;
593
594 fs->fs_fmod = 0;
595 if (fs->fs_clean & FS_WASCLEAN)
596 fs->fs_time = time_second;
597 else {
598 printf("%s: file system not clean (fs_clean=%#x); "
599 "please fsck(8)\n", mp->mnt_stat.f_mntfromname,
600 fs->fs_clean);
601 printf("%s: lost blocks %" PRId64 " files %d\n",
602 mp->mnt_stat.f_mntfromname, fs->fs_pendingblocks,
603 fs->fs_pendinginodes);
604 }
605 err = UFS_WAPBL_BEGIN(mp);
606 if (err == 0) {
607 (void) ffs_cgupdate(ump, MNT_WAIT);
608 UFS_WAPBL_END(mp);
609 }
610 }
611 if ((mp->mnt_flag & MNT_SOFTDEP) != 0) {
612 printf("%s: `-o softdep' is no longer supported, "
613 "consider `-o log'\n", mp->mnt_stat.f_mntfromname);
614 mp->mnt_flag &= ~MNT_SOFTDEP;
615 }
616
617 return (error);
618
619 fail:
620 vrele(devvp);
621 return (error);
622 }
623
624 /*
625 * Reload all incore data for a filesystem (used after running fsck on
626 * the root filesystem and finding things to fix). The filesystem must
627 * be mounted read-only.
628 *
629 * Things to do to update the mount:
630 * 1) invalidate all cached meta-data.
631 * 2) re-read superblock from disk.
632 * 3) re-read summary information from disk.
633 * 4) invalidate all inactive vnodes.
634 * 5) invalidate all cached file data.
635 * 6) re-read inode data for all active vnodes.
636 */
637 int
638 ffs_reload(struct mount *mp, kauth_cred_t cred, struct lwp *l)
639 {
640 struct vnode *vp, *devvp;
641 struct inode *ip;
642 void *space;
643 struct buf *bp;
644 struct fs *fs, *newfs;
645 struct dkwedge_info dkw;
646 int i, bsize, blks, error;
647 int32_t *lp;
648 struct ufsmount *ump;
649 daddr_t sblockloc;
650 struct vnode_iterator *marker;
651
652 if ((mp->mnt_flag & MNT_RDONLY) == 0)
653 return (EINVAL);
654
655 ump = VFSTOUFS(mp);
656 /*
657 * Step 1: invalidate all cached meta-data.
658 */
659 devvp = ump->um_devvp;
660 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
661 error = vinvalbuf(devvp, 0, cred, l, 0, 0);
662 VOP_UNLOCK(devvp);
663 if (error)
664 panic("ffs_reload: dirty1");
665 /*
666 * Step 2: re-read superblock from disk.
667 */
668 fs = ump->um_fs;
669
670 /* XXX we don't handle possibility that superblock moved. */
671 error = bread(devvp, fs->fs_sblockloc / DEV_BSIZE, fs->fs_sbsize,
672 NOCRED, 0, &bp);
673 if (error) {
674 return (error);
675 }
676 newfs = kmem_alloc(fs->fs_sbsize, KM_SLEEP);
677 memcpy(newfs, bp->b_data, fs->fs_sbsize);
678 #ifdef FFS_EI
679 if (ump->um_flags & UFS_NEEDSWAP) {
680 ffs_sb_swap((struct fs*)bp->b_data, newfs);
681 fs->fs_flags |= FS_SWAPPED;
682 } else
683 #endif
684 fs->fs_flags &= ~FS_SWAPPED;
685 if ((newfs->fs_magic != FS_UFS1_MAGIC &&
686 newfs->fs_magic != FS_UFS2_MAGIC)||
687 newfs->fs_bsize > MAXBSIZE ||
688 newfs->fs_bsize < sizeof(struct fs)) {
689 brelse(bp, 0);
690 kmem_free(newfs, fs->fs_sbsize);
691 return (EIO); /* XXX needs translation */
692 }
693 /* Store off old fs_sblockloc for fs_oldfscompat_read. */
694 sblockloc = fs->fs_sblockloc;
695 /*
696 * Copy pointer fields back into superblock before copying in XXX
697 * new superblock. These should really be in the ufsmount. XXX
698 * Note that important parameters (eg fs_ncg) are unchanged.
699 */
700 newfs->fs_csp = fs->fs_csp;
701 newfs->fs_maxcluster = fs->fs_maxcluster;
702 newfs->fs_contigdirs = fs->fs_contigdirs;
703 newfs->fs_ronly = fs->fs_ronly;
704 newfs->fs_active = fs->fs_active;
705 memcpy(fs, newfs, (u_int)fs->fs_sbsize);
706 brelse(bp, 0);
707 kmem_free(newfs, fs->fs_sbsize);
708
709 /* Recheck for apple UFS filesystem */
710 ump->um_flags &= ~UFS_ISAPPLEUFS;
711 /* First check to see if this is tagged as an Apple UFS filesystem
712 * in the disklabel
713 */
714 if (getdiskinfo(devvp, &dkw) == 0 &&
715 strcmp(dkw.dkw_ptype, DKW_PTYPE_APPLEUFS) == 0)
716 ump->um_flags |= UFS_ISAPPLEUFS;
717 #ifdef APPLE_UFS
718 else {
719 /* Manually look for an apple ufs label, and if a valid one
720 * is found, then treat it like an Apple UFS filesystem anyway
721 *
722 * EINVAL is most probably a blocksize or alignment problem,
723 * it is unlikely that this is an Apple UFS filesystem then.
724 */
725 error = bread(devvp, (daddr_t)(APPLEUFS_LABEL_OFFSET / DEV_BSIZE),
726 APPLEUFS_LABEL_SIZE, cred, 0, &bp);
727 if (error && error != EINVAL) {
728 return (error);
729 }
730 if (error == 0) {
731 error = ffs_appleufs_validate(fs->fs_fsmnt,
732 (struct appleufslabel *)bp->b_data, NULL);
733 if (error == 0)
734 ump->um_flags |= UFS_ISAPPLEUFS;
735 brelse(bp, 0);
736 }
737 bp = NULL;
738 }
739 #else
740 if (ump->um_flags & UFS_ISAPPLEUFS)
741 return (EIO);
742 #endif
743
744 if (UFS_MPISAPPLEUFS(ump)) {
745 /* see comment about NeXT below */
746 ump->um_maxsymlinklen = APPLEUFS_MAXSYMLINKLEN;
747 ump->um_dirblksiz = APPLEUFS_DIRBLKSIZ;
748 mp->mnt_iflag |= IMNT_DTYPE;
749 } else {
750 ump->um_maxsymlinklen = fs->fs_maxsymlinklen;
751 ump->um_dirblksiz = UFS_DIRBLKSIZ;
752 if (ump->um_maxsymlinklen > 0)
753 mp->mnt_iflag |= IMNT_DTYPE;
754 else
755 mp->mnt_iflag &= ~IMNT_DTYPE;
756 }
757 ffs_oldfscompat_read(fs, ump, sblockloc);
758
759 mutex_enter(&ump->um_lock);
760 ump->um_maxfilesize = fs->fs_maxfilesize;
761 if (fs->fs_flags & ~(FS_KNOWN_FLAGS | FS_INTERNAL)) {
762 uprintf("%s: unknown ufs flags: 0x%08"PRIx32"%s\n",
763 mp->mnt_stat.f_mntonname, fs->fs_flags,
764 (mp->mnt_flag & MNT_FORCE) ? "" : ", not mounting");
765 if ((mp->mnt_flag & MNT_FORCE) == 0) {
766 mutex_exit(&ump->um_lock);
767 return (EINVAL);
768 }
769 }
770 if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) {
771 fs->fs_pendingblocks = 0;
772 fs->fs_pendinginodes = 0;
773 }
774 mutex_exit(&ump->um_lock);
775
776 ffs_statvfs(mp, &mp->mnt_stat);
777 /*
778 * Step 3: re-read summary information from disk.
779 */
780 blks = howmany(fs->fs_cssize, fs->fs_fsize);
781 space = fs->fs_csp;
782 for (i = 0; i < blks; i += fs->fs_frag) {
783 bsize = fs->fs_bsize;
784 if (i + fs->fs_frag > blks)
785 bsize = (blks - i) * fs->fs_fsize;
786 error = bread(devvp, FFS_FSBTODB(fs, fs->fs_csaddr + i), bsize,
787 NOCRED, 0, &bp);
788 if (error) {
789 return (error);
790 }
791 #ifdef FFS_EI
792 if (UFS_FSNEEDSWAP(fs))
793 ffs_csum_swap((struct csum *)bp->b_data,
794 (struct csum *)space, bsize);
795 else
796 #endif
797 memcpy(space, bp->b_data, (size_t)bsize);
798 space = (char *)space + bsize;
799 brelse(bp, 0);
800 }
801 /*
802 * We no longer know anything about clusters per cylinder group.
803 */
804 if (fs->fs_contigsumsize > 0) {
805 lp = fs->fs_maxcluster;
806 for (i = 0; i < fs->fs_ncg; i++)
807 *lp++ = fs->fs_contigsumsize;
808 }
809
810 vfs_vnode_iterator_init(mp, &marker);
811 while ((vp = vfs_vnode_iterator_next(marker, NULL, NULL))) {
812 /*
813 * Step 4: invalidate all inactive vnodes.
814 */
815 if (vrecycle(vp))
816 continue;
817 /*
818 * Step 5: invalidate all cached file data.
819 */
820 if (vn_lock(vp, LK_EXCLUSIVE)) {
821 vrele(vp);
822 continue;
823 }
824 if (vinvalbuf(vp, 0, cred, l, 0, 0))
825 panic("ffs_reload: dirty2");
826 /*
827 * Step 6: re-read inode data for all active vnodes.
828 */
829 ip = VTOI(vp);
830 error = bread(devvp, FFS_FSBTODB(fs, ino_to_fsba(fs, ip->i_number)),
831 (int)fs->fs_bsize, NOCRED, 0, &bp);
832 if (error) {
833 vput(vp);
834 break;
835 }
836 ffs_load_inode(bp, ip, fs, ip->i_number);
837 brelse(bp, 0);
838 vput(vp);
839 }
840 vfs_vnode_iterator_destroy(marker);
841 return (error);
842 }
843
844 /*
845 * Possible superblock locations ordered from most to least likely.
846 */
847 static const int sblock_try[] = SBLOCKSEARCH;
848
849 /*
850 * Common code for mount and mountroot
851 */
852 int
853 ffs_mountfs(struct vnode *devvp, struct mount *mp, struct lwp *l)
854 {
855 struct ufsmount *ump;
856 struct buf *bp;
857 struct fs *fs;
858 dev_t dev;
859 struct dkwedge_info dkw;
860 void *space;
861 daddr_t sblockloc, fsblockloc;
862 int blks, fstype;
863 int error, i, bsize, ronly, bset = 0;
864 #ifdef FFS_EI
865 int needswap = 0; /* keep gcc happy */
866 #endif
867 int32_t *lp;
868 kauth_cred_t cred;
869 u_int32_t sbsize = 8192; /* keep gcc happy*/
870 u_int32_t allocsbsize;
871 int32_t fsbsize;
872
873 dev = devvp->v_rdev;
874
875 cred = l ? l->l_cred : NOCRED;
876
877 /* Flush out any old buffers remaining from a previous use. */
878 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
879 error = vinvalbuf(devvp, V_SAVE, cred, l, 0, 0);
880 VOP_UNLOCK(devvp);
881 if (error)
882 return (error);
883
884 ronly = (mp->mnt_flag & MNT_RDONLY) != 0;
885
886 bp = NULL;
887 ump = NULL;
888 fs = NULL;
889 sblockloc = 0;
890 fstype = 0;
891
892 error = fstrans_mount(mp);
893 if (error)
894 return error;
895
896 ump = kmem_zalloc(sizeof(*ump), KM_SLEEP);
897 mutex_init(&ump->um_lock, MUTEX_DEFAULT, IPL_NONE);
898 error = ffs_snapshot_init(ump);
899 if (error)
900 goto out;
901 ump->um_ops = &ffs_ufsops;
902
903 #ifdef WAPBL
904 sbagain:
905 #endif
906 /*
907 * Try reading the superblock in each of its possible locations.
908 */
909 for (i = 0; ; i++) {
910 if (bp != NULL) {
911 brelse(bp, BC_NOCACHE);
912 bp = NULL;
913 }
914 if (sblock_try[i] == -1) {
915 error = EINVAL;
916 fs = NULL;
917 goto out;
918 }
919 error = bread(devvp, sblock_try[i] / DEV_BSIZE, SBLOCKSIZE, cred,
920 0, &bp);
921 if (error) {
922 fs = NULL;
923 goto out;
924 }
925 fs = (struct fs*)bp->b_data;
926 fsblockloc = sblockloc = sblock_try[i];
927 if (fs->fs_magic == FS_UFS1_MAGIC) {
928 sbsize = fs->fs_sbsize;
929 fstype = UFS1;
930 fsbsize = fs->fs_bsize;
931 #ifdef FFS_EI
932 needswap = 0;
933 } else if (fs->fs_magic == FS_UFS1_MAGIC_SWAPPED) {
934 sbsize = bswap32(fs->fs_sbsize);
935 fstype = UFS1;
936 fsbsize = bswap32(fs->fs_bsize);
937 needswap = 1;
938 #endif
939 } else if (fs->fs_magic == FS_UFS2_MAGIC) {
940 sbsize = fs->fs_sbsize;
941 fstype = UFS2;
942 fsbsize = fs->fs_bsize;
943 #ifdef FFS_EI
944 needswap = 0;
945 } else if (fs->fs_magic == FS_UFS2_MAGIC_SWAPPED) {
946 sbsize = bswap32(fs->fs_sbsize);
947 fstype = UFS2;
948 fsbsize = bswap32(fs->fs_bsize);
949 needswap = 1;
950 #endif
951 } else
952 continue;
953
954
955 /* fs->fs_sblockloc isn't defined for old filesystems */
956 if (fstype == UFS1 && !(fs->fs_old_flags & FS_FLAGS_UPDATED)) {
957 if (sblockloc == SBLOCK_UFS2)
958 /*
959 * This is likely to be the first alternate
960 * in a filesystem with 64k blocks.
961 * Don't use it.
962 */
963 continue;
964 fsblockloc = sblockloc;
965 } else {
966 fsblockloc = fs->fs_sblockloc;
967 #ifdef FFS_EI
968 if (needswap)
969 fsblockloc = bswap64(fsblockloc);
970 #endif
971 }
972
973 /* Check we haven't found an alternate superblock */
974 if (fsblockloc != sblockloc)
975 continue;
976
977 /* Validate size of superblock */
978 if (sbsize > MAXBSIZE || sbsize < sizeof(struct fs))
979 continue;
980
981 /* Check that we can handle the file system blocksize */
982 if (fsbsize > MAXBSIZE) {
983 printf("ffs_mountfs: block size (%d) > MAXBSIZE (%d)\n",
984 fsbsize, MAXBSIZE);
985 continue;
986 }
987
988 /* Ok seems to be a good superblock */
989 break;
990 }
991
992 fs = kmem_alloc((u_long)sbsize, KM_SLEEP);
993 memcpy(fs, bp->b_data, sbsize);
994 ump->um_fs = fs;
995
996 #ifdef FFS_EI
997 if (needswap) {
998 ffs_sb_swap((struct fs*)bp->b_data, fs);
999 fs->fs_flags |= FS_SWAPPED;
1000 } else
1001 #endif
1002 fs->fs_flags &= ~FS_SWAPPED;
1003
1004 #ifdef WAPBL
1005 if ((mp->mnt_wapbl_replay == 0) && (fs->fs_flags & FS_DOWAPBL)) {
1006 error = ffs_wapbl_replay_start(mp, fs, devvp);
1007 if (error && (mp->mnt_flag & MNT_FORCE) == 0)
1008 goto out;
1009 if (!error) {
1010 if (!ronly) {
1011 /* XXX fsmnt may be stale. */
1012 printf("%s: replaying log to disk\n",
1013 fs->fs_fsmnt);
1014 error = wapbl_replay_write(mp->mnt_wapbl_replay,
1015 devvp);
1016 if (error)
1017 goto out;
1018 wapbl_replay_stop(mp->mnt_wapbl_replay);
1019 fs->fs_clean = FS_WASCLEAN;
1020 } else {
1021 /* XXX fsmnt may be stale */
1022 printf("%s: replaying log to memory\n",
1023 fs->fs_fsmnt);
1024 }
1025
1026 /* Force a re-read of the superblock */
1027 brelse(bp, BC_INVAL);
1028 bp = NULL;
1029 kmem_free(fs, sbsize);
1030 fs = NULL;
1031 goto sbagain;
1032 }
1033 }
1034 #else /* !WAPBL */
1035 if ((fs->fs_flags & FS_DOWAPBL) && (mp->mnt_flag & MNT_FORCE) == 0) {
1036 error = EPERM;
1037 goto out;
1038 }
1039 #endif /* !WAPBL */
1040
1041 ffs_oldfscompat_read(fs, ump, sblockloc);
1042 ump->um_maxfilesize = fs->fs_maxfilesize;
1043
1044 if (fs->fs_flags & ~(FS_KNOWN_FLAGS | FS_INTERNAL)) {
1045 uprintf("%s: unknown ufs flags: 0x%08"PRIx32"%s\n",
1046 mp->mnt_stat.f_mntonname, fs->fs_flags,
1047 (mp->mnt_flag & MNT_FORCE) ? "" : ", not mounting");
1048 if ((mp->mnt_flag & MNT_FORCE) == 0) {
1049 error = EINVAL;
1050 goto out;
1051 }
1052 }
1053
1054 if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) {
1055 fs->fs_pendingblocks = 0;
1056 fs->fs_pendinginodes = 0;
1057 }
1058
1059 ump->um_fstype = fstype;
1060 if (fs->fs_sbsize < SBLOCKSIZE)
1061 brelse(bp, BC_INVAL);
1062 else
1063 brelse(bp, 0);
1064 bp = NULL;
1065
1066 /* First check to see if this is tagged as an Apple UFS filesystem
1067 * in the disklabel
1068 */
1069 if (getdiskinfo(devvp, &dkw) == 0 &&
1070 strcmp(dkw.dkw_ptype, DKW_PTYPE_APPLEUFS) == 0)
1071 ump->um_flags |= UFS_ISAPPLEUFS;
1072 #ifdef APPLE_UFS
1073 else {
1074 /* Manually look for an apple ufs label, and if a valid one
1075 * is found, then treat it like an Apple UFS filesystem anyway
1076 */
1077 error = bread(devvp, (daddr_t)(APPLEUFS_LABEL_OFFSET / DEV_BSIZE),
1078 APPLEUFS_LABEL_SIZE, cred, 0, &bp);
1079 if (error)
1080 goto out;
1081 error = ffs_appleufs_validate(fs->fs_fsmnt,
1082 (struct appleufslabel *)bp->b_data, NULL);
1083 if (error == 0) {
1084 ump->um_flags |= UFS_ISAPPLEUFS;
1085 }
1086 brelse(bp, 0);
1087 bp = NULL;
1088 }
1089 #else
1090 if (ump->um_flags & UFS_ISAPPLEUFS) {
1091 error = EINVAL;
1092 goto out;
1093 }
1094 #endif
1095
1096 #if 0
1097 /*
1098 * XXX This code changes the behaviour of mounting dirty filesystems, to
1099 * XXX require "mount -f ..." to mount them. This doesn't match what
1100 * XXX mount(8) describes and is disabled for now.
1101 */
1102 /*
1103 * If the file system is not clean, don't allow it to be mounted
1104 * unless MNT_FORCE is specified. (Note: MNT_FORCE is always set
1105 * for the root file system.)
1106 */
1107 if (fs->fs_flags & FS_DOWAPBL) {
1108 /*
1109 * wapbl normally expects to be FS_WASCLEAN when the FS_DOWAPBL
1110 * bit is set, although there's a window in unmount where it
1111 * could be FS_ISCLEAN
1112 */
1113 if ((mp->mnt_flag & MNT_FORCE) == 0 &&
1114 (fs->fs_clean & (FS_WASCLEAN | FS_ISCLEAN)) == 0) {
1115 error = EPERM;
1116 goto out;
1117 }
1118 } else
1119 if ((fs->fs_clean & FS_ISCLEAN) == 0 &&
1120 (mp->mnt_flag & MNT_FORCE) == 0) {
1121 error = EPERM;
1122 goto out;
1123 }
1124 #endif
1125
1126 /*
1127 * verify that we can access the last block in the fs
1128 * if we're mounting read/write.
1129 */
1130
1131 if (!ronly) {
1132 error = bread(devvp, FFS_FSBTODB(fs, fs->fs_size - 1),
1133 fs->fs_fsize, cred, 0, &bp);
1134 if (error) {
1135 bset = BC_INVAL;
1136 goto out;
1137 }
1138 if (bp->b_bcount != fs->fs_fsize)
1139 error = EINVAL;
1140 brelse(bp, BC_INVAL);
1141 bp = NULL;
1142 }
1143
1144 fs->fs_ronly = ronly;
1145 /* Don't bump fs_clean if we're replaying journal */
1146 if (!((fs->fs_flags & FS_DOWAPBL) && (fs->fs_clean & FS_WASCLEAN)))
1147 if (ronly == 0) {
1148 fs->fs_clean <<= 1;
1149 fs->fs_fmod = 1;
1150 }
1151 bsize = fs->fs_cssize;
1152 blks = howmany(bsize, fs->fs_fsize);
1153 if (fs->fs_contigsumsize > 0)
1154 bsize += fs->fs_ncg * sizeof(int32_t);
1155 bsize += fs->fs_ncg * sizeof(*fs->fs_contigdirs);
1156 allocsbsize = bsize;
1157 space = kmem_alloc((u_long)allocsbsize, KM_SLEEP);
1158 fs->fs_csp = space;
1159 for (i = 0; i < blks; i += fs->fs_frag) {
1160 bsize = fs->fs_bsize;
1161 if (i + fs->fs_frag > blks)
1162 bsize = (blks - i) * fs->fs_fsize;
1163 error = bread(devvp, FFS_FSBTODB(fs, fs->fs_csaddr + i), bsize,
1164 cred, 0, &bp);
1165 if (error) {
1166 kmem_free(fs->fs_csp, allocsbsize);
1167 goto out;
1168 }
1169 #ifdef FFS_EI
1170 if (needswap)
1171 ffs_csum_swap((struct csum *)bp->b_data,
1172 (struct csum *)space, bsize);
1173 else
1174 #endif
1175 memcpy(space, bp->b_data, (u_int)bsize);
1176
1177 space = (char *)space + bsize;
1178 brelse(bp, 0);
1179 bp = NULL;
1180 }
1181 if (fs->fs_contigsumsize > 0) {
1182 fs->fs_maxcluster = lp = space;
1183 for (i = 0; i < fs->fs_ncg; i++)
1184 *lp++ = fs->fs_contigsumsize;
1185 space = lp;
1186 }
1187 bsize = fs->fs_ncg * sizeof(*fs->fs_contigdirs);
1188 fs->fs_contigdirs = space;
1189 space = (char *)space + bsize;
1190 memset(fs->fs_contigdirs, 0, bsize);
1191 /* Compatibility for old filesystems - XXX */
1192 if (fs->fs_avgfilesize <= 0)
1193 fs->fs_avgfilesize = AVFILESIZ;
1194 if (fs->fs_avgfpdir <= 0)
1195 fs->fs_avgfpdir = AFPDIR;
1196 fs->fs_active = NULL;
1197 mp->mnt_data = ump;
1198 mp->mnt_stat.f_fsidx.__fsid_val[0] = (long)dev;
1199 mp->mnt_stat.f_fsidx.__fsid_val[1] = makefstype(MOUNT_FFS);
1200 mp->mnt_stat.f_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0];
1201 mp->mnt_stat.f_namemax = FFS_MAXNAMLEN;
1202 if (UFS_MPISAPPLEUFS(ump)) {
1203 /* NeXT used to keep short symlinks in the inode even
1204 * when using FS_42INODEFMT. In that case fs->fs_maxsymlinklen
1205 * is probably -1, but we still need to be able to identify
1206 * short symlinks.
1207 */
1208 ump->um_maxsymlinklen = APPLEUFS_MAXSYMLINKLEN;
1209 ump->um_dirblksiz = APPLEUFS_DIRBLKSIZ;
1210 mp->mnt_iflag |= IMNT_DTYPE;
1211 } else {
1212 ump->um_maxsymlinklen = fs->fs_maxsymlinklen;
1213 ump->um_dirblksiz = UFS_DIRBLKSIZ;
1214 if (ump->um_maxsymlinklen > 0)
1215 mp->mnt_iflag |= IMNT_DTYPE;
1216 else
1217 mp->mnt_iflag &= ~IMNT_DTYPE;
1218 }
1219 mp->mnt_fs_bshift = fs->fs_bshift;
1220 mp->mnt_dev_bshift = DEV_BSHIFT; /* XXX */
1221 mp->mnt_flag |= MNT_LOCAL;
1222 mp->mnt_iflag |= IMNT_MPSAFE;
1223 #ifdef FFS_EI
1224 if (needswap)
1225 ump->um_flags |= UFS_NEEDSWAP;
1226 #endif
1227 ump->um_mountp = mp;
1228 ump->um_dev = dev;
1229 ump->um_devvp = devvp;
1230 ump->um_nindir = fs->fs_nindir;
1231 ump->um_lognindir = ffs(fs->fs_nindir) - 1;
1232 ump->um_bptrtodb = fs->fs_fshift - DEV_BSHIFT;
1233 ump->um_seqinc = fs->fs_frag;
1234 for (i = 0; i < MAXQUOTAS; i++)
1235 ump->um_quotas[i] = NULLVP;
1236 spec_node_setmountedfs(devvp, mp);
1237
1238 /* Before we start WAPBL or touch any snapshots, adjust maxphys */
1239 ufs_update_maxphys(mp);
1240
1241 if (ronly == 0 && fs->fs_snapinum[0] != 0)
1242 ffs_snapshot_mount(mp);
1243
1244 #ifdef WAPBL
1245 if (!ronly) {
1246 KDASSERT(fs->fs_ronly == 0);
1247 /*
1248 * ffs_wapbl_start() needs mp->mnt_stat initialised if it
1249 * needs to create a new log file in-filesystem.
1250 */
1251 ffs_statvfs(mp, &mp->mnt_stat);
1252
1253 error = ffs_wapbl_start(mp);
1254 if (error) {
1255 kmem_free(fs->fs_csp, allocsbsize);
1256 goto out;
1257 }
1258 }
1259 #endif /* WAPBL */
1260 if (ronly == 0) {
1261 #ifdef QUOTA2
1262 error = ffs_quota2_mount(mp);
1263 if (error) {
1264 kmem_free(fs->fs_csp, allocsbsize);
1265 goto out;
1266 }
1267 #else
1268 if (fs->fs_flags & FS_DOQUOTA2) {
1269 ump->um_flags |= UFS_QUOTA2;
1270 uprintf("%s: options QUOTA2 not enabled%s\n",
1271 mp->mnt_stat.f_mntonname,
1272 (mp->mnt_flag & MNT_FORCE) ? "" : ", not mounting");
1273 if ((mp->mnt_flag & MNT_FORCE) == 0) {
1274 error = EINVAL;
1275 kmem_free(fs->fs_csp, allocsbsize);
1276 goto out;
1277 }
1278 }
1279 #endif
1280 }
1281 #ifdef UFS_EXTATTR
1282 /*
1283 * Initialize file-backed extended attributes on UFS1 file
1284 * systems.
1285 */
1286 if (ump->um_fstype == UFS1)
1287 ufs_extattr_uepm_init(&ump->um_extattr);
1288 #endif /* UFS_EXTATTR */
1289
1290 if (mp->mnt_flag & MNT_DISCARD)
1291 ump->um_discarddata = ffs_discard_init(devvp, fs);
1292
1293 return (0);
1294 out:
1295 #ifdef WAPBL
1296 if (mp->mnt_wapbl_replay) {
1297 wapbl_replay_stop(mp->mnt_wapbl_replay);
1298 wapbl_replay_free(mp->mnt_wapbl_replay);
1299 mp->mnt_wapbl_replay = 0;
1300 }
1301 #endif
1302
1303 fstrans_unmount(mp);
1304 if (fs)
1305 kmem_free(fs, fs->fs_sbsize);
1306 spec_node_setmountedfs(devvp, NULL);
1307 if (bp)
1308 brelse(bp, bset);
1309 if (ump) {
1310 if (ump->um_oldfscompat)
1311 kmem_free(ump->um_oldfscompat, 512 + 3*sizeof(int32_t));
1312 mutex_destroy(&ump->um_lock);
1313 kmem_free(ump, sizeof(*ump));
1314 mp->mnt_data = NULL;
1315 }
1316 return (error);
1317 }
1318
1319 /*
1320 * Sanity checks for loading old filesystem superblocks.
1321 * See ffs_oldfscompat_write below for unwound actions.
1322 *
1323 * XXX - Parts get retired eventually.
1324 * Unfortunately new bits get added.
1325 */
1326 static void
1327 ffs_oldfscompat_read(struct fs *fs, struct ufsmount *ump, daddr_t sblockloc)
1328 {
1329 off_t maxfilesize;
1330 int32_t *extrasave;
1331
1332 if ((fs->fs_magic != FS_UFS1_MAGIC) ||
1333 (fs->fs_old_flags & FS_FLAGS_UPDATED))
1334 return;
1335
1336 if (!ump->um_oldfscompat)
1337 ump->um_oldfscompat = kmem_alloc(512 + 3*sizeof(int32_t),
1338 KM_SLEEP);
1339
1340 memcpy(ump->um_oldfscompat, &fs->fs_old_postbl_start, 512);
1341 extrasave = ump->um_oldfscompat;
1342 extrasave += 512/sizeof(int32_t);
1343 extrasave[0] = fs->fs_old_npsect;
1344 extrasave[1] = fs->fs_old_interleave;
1345 extrasave[2] = fs->fs_old_trackskew;
1346
1347 /* These fields will be overwritten by their
1348 * original values in fs_oldfscompat_write, so it is harmless
1349 * to modify them here.
1350 */
1351 fs->fs_cstotal.cs_ndir = fs->fs_old_cstotal.cs_ndir;
1352 fs->fs_cstotal.cs_nbfree = fs->fs_old_cstotal.cs_nbfree;
1353 fs->fs_cstotal.cs_nifree = fs->fs_old_cstotal.cs_nifree;
1354 fs->fs_cstotal.cs_nffree = fs->fs_old_cstotal.cs_nffree;
1355
1356 fs->fs_maxbsize = fs->fs_bsize;
1357 fs->fs_time = fs->fs_old_time;
1358 fs->fs_size = fs->fs_old_size;
1359 fs->fs_dsize = fs->fs_old_dsize;
1360 fs->fs_csaddr = fs->fs_old_csaddr;
1361 fs->fs_sblockloc = sblockloc;
1362
1363 fs->fs_flags = fs->fs_old_flags | (fs->fs_flags & FS_INTERNAL);
1364
1365 if (fs->fs_old_postblformat == FS_42POSTBLFMT) {
1366 fs->fs_old_nrpos = 8;
1367 fs->fs_old_npsect = fs->fs_old_nsect;
1368 fs->fs_old_interleave = 1;
1369 fs->fs_old_trackskew = 0;
1370 }
1371
1372 if (fs->fs_old_inodefmt < FS_44INODEFMT) {
1373 fs->fs_maxfilesize = (u_quad_t) 1LL << 39;
1374 fs->fs_qbmask = ~fs->fs_bmask;
1375 fs->fs_qfmask = ~fs->fs_fmask;
1376 }
1377
1378 maxfilesize = (u_int64_t)0x80000000 * fs->fs_bsize - 1;
1379 if (fs->fs_maxfilesize > maxfilesize)
1380 fs->fs_maxfilesize = maxfilesize;
1381
1382 /* Compatibility for old filesystems */
1383 if (fs->fs_avgfilesize <= 0)
1384 fs->fs_avgfilesize = AVFILESIZ;
1385 if (fs->fs_avgfpdir <= 0)
1386 fs->fs_avgfpdir = AFPDIR;
1387
1388 #if 0
1389 if (bigcgs) {
1390 fs->fs_save_cgsize = fs->fs_cgsize;
1391 fs->fs_cgsize = fs->fs_bsize;
1392 }
1393 #endif
1394 }
1395
1396 /*
1397 * Unwinding superblock updates for old filesystems.
1398 * See ffs_oldfscompat_read above for details.
1399 *
1400 * XXX - Parts get retired eventually.
1401 * Unfortunately new bits get added.
1402 */
1403 static void
1404 ffs_oldfscompat_write(struct fs *fs, struct ufsmount *ump)
1405 {
1406 int32_t *extrasave;
1407
1408 if ((fs->fs_magic != FS_UFS1_MAGIC) ||
1409 (fs->fs_old_flags & FS_FLAGS_UPDATED))
1410 return;
1411
1412 fs->fs_old_time = fs->fs_time;
1413 fs->fs_old_cstotal.cs_ndir = fs->fs_cstotal.cs_ndir;
1414 fs->fs_old_cstotal.cs_nbfree = fs->fs_cstotal.cs_nbfree;
1415 fs->fs_old_cstotal.cs_nifree = fs->fs_cstotal.cs_nifree;
1416 fs->fs_old_cstotal.cs_nffree = fs->fs_cstotal.cs_nffree;
1417 fs->fs_old_flags = fs->fs_flags;
1418
1419 #if 0
1420 if (bigcgs) {
1421 fs->fs_cgsize = fs->fs_save_cgsize;
1422 }
1423 #endif
1424
1425 memcpy(&fs->fs_old_postbl_start, ump->um_oldfscompat, 512);
1426 extrasave = ump->um_oldfscompat;
1427 extrasave += 512/sizeof(int32_t);
1428 fs->fs_old_npsect = extrasave[0];
1429 fs->fs_old_interleave = extrasave[1];
1430 fs->fs_old_trackskew = extrasave[2];
1431
1432 }
1433
1434 /*
1435 * unmount vfs operation
1436 */
1437 int
1438 ffs_unmount(struct mount *mp, int mntflags)
1439 {
1440 struct lwp *l = curlwp;
1441 struct ufsmount *ump = VFSTOUFS(mp);
1442 struct fs *fs = ump->um_fs;
1443 int error, flags;
1444 u_int32_t bsize;
1445 #ifdef WAPBL
1446 extern int doforce;
1447 #endif
1448
1449 if (ump->um_discarddata) {
1450 ffs_discard_finish(ump->um_discarddata, mntflags);
1451 ump->um_discarddata = NULL;
1452 }
1453
1454 flags = 0;
1455 if (mntflags & MNT_FORCE)
1456 flags |= FORCECLOSE;
1457 if ((error = ffs_flushfiles(mp, flags, l)) != 0)
1458 return (error);
1459 error = UFS_WAPBL_BEGIN(mp);
1460 if (error == 0)
1461 if (fs->fs_ronly == 0 &&
1462 ffs_cgupdate(ump, MNT_WAIT) == 0 &&
1463 fs->fs_clean & FS_WASCLEAN) {
1464 fs->fs_clean = FS_ISCLEAN;
1465 fs->fs_fmod = 0;
1466 (void) ffs_sbupdate(ump, MNT_WAIT);
1467 }
1468 if (error == 0)
1469 UFS_WAPBL_END(mp);
1470 #ifdef WAPBL
1471 KASSERT(!(mp->mnt_wapbl_replay && mp->mnt_wapbl));
1472 if (mp->mnt_wapbl_replay) {
1473 KDASSERT(fs->fs_ronly);
1474 wapbl_replay_stop(mp->mnt_wapbl_replay);
1475 wapbl_replay_free(mp->mnt_wapbl_replay);
1476 mp->mnt_wapbl_replay = 0;
1477 }
1478 error = ffs_wapbl_stop(mp, doforce && (mntflags & MNT_FORCE));
1479 if (error) {
1480 return error;
1481 }
1482 #endif /* WAPBL */
1483
1484 if (ump->um_devvp->v_type != VBAD)
1485 spec_node_setmountedfs(ump->um_devvp, NULL);
1486 vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY);
1487 (void)VOP_CLOSE(ump->um_devvp, fs->fs_ronly ? FREAD : FREAD | FWRITE,
1488 NOCRED);
1489 vput(ump->um_devvp);
1490
1491 bsize = fs->fs_cssize;
1492 if (fs->fs_contigsumsize > 0)
1493 bsize += fs->fs_ncg * sizeof(int32_t);
1494 bsize += fs->fs_ncg * sizeof(*fs->fs_contigdirs);
1495 kmem_free(fs->fs_csp, bsize);
1496
1497 kmem_free(fs, fs->fs_sbsize);
1498 if (ump->um_oldfscompat != NULL)
1499 kmem_free(ump->um_oldfscompat, 512 + 3*sizeof(int32_t));
1500 mutex_destroy(&ump->um_lock);
1501 ffs_snapshot_fini(ump);
1502 kmem_free(ump, sizeof(*ump));
1503 mp->mnt_data = NULL;
1504 mp->mnt_flag &= ~MNT_LOCAL;
1505 fstrans_unmount(mp);
1506 return (0);
1507 }
1508
1509 /*
1510 * Flush out all the files in a filesystem.
1511 */
1512 int
1513 ffs_flushfiles(struct mount *mp, int flags, struct lwp *l)
1514 {
1515 extern int doforce;
1516 struct ufsmount *ump;
1517 int error;
1518
1519 if (!doforce)
1520 flags &= ~FORCECLOSE;
1521 ump = VFSTOUFS(mp);
1522 #ifdef QUOTA
1523 if ((error = quota1_umount(mp, flags)) != 0)
1524 return (error);
1525 #endif
1526 #ifdef QUOTA2
1527 if ((error = quota2_umount(mp, flags)) != 0)
1528 return (error);
1529 #endif
1530 #ifdef UFS_EXTATTR
1531 if (ump->um_fstype == UFS1) {
1532 if (ump->um_extattr.uepm_flags & UFS_EXTATTR_UEPM_STARTED)
1533 ufs_extattr_stop(mp, l);
1534 if (ump->um_extattr.uepm_flags & UFS_EXTATTR_UEPM_INITIALIZED)
1535 ufs_extattr_uepm_destroy(&ump->um_extattr);
1536 }
1537 #endif
1538 if ((error = vflush(mp, 0, SKIPSYSTEM | flags)) != 0)
1539 return (error);
1540 ffs_snapshot_unmount(mp);
1541 /*
1542 * Flush all the files.
1543 */
1544 error = vflush(mp, NULLVP, flags);
1545 if (error)
1546 return (error);
1547 /*
1548 * Flush filesystem metadata.
1549 */
1550 vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY);
1551 error = VOP_FSYNC(ump->um_devvp, l->l_cred, FSYNC_WAIT, 0, 0);
1552 VOP_UNLOCK(ump->um_devvp);
1553 if (flags & FORCECLOSE) /* XXXDBJ */
1554 error = 0;
1555
1556 #ifdef WAPBL
1557 if (error)
1558 return error;
1559 if (mp->mnt_wapbl) {
1560 error = wapbl_flush(mp->mnt_wapbl, 1);
1561 if (flags & FORCECLOSE)
1562 error = 0;
1563 }
1564 #endif
1565
1566 return (error);
1567 }
1568
1569 /*
1570 * Get file system statistics.
1571 */
1572 int
1573 ffs_statvfs(struct mount *mp, struct statvfs *sbp)
1574 {
1575 struct ufsmount *ump;
1576 struct fs *fs;
1577
1578 ump = VFSTOUFS(mp);
1579 fs = ump->um_fs;
1580 mutex_enter(&ump->um_lock);
1581 sbp->f_bsize = fs->fs_bsize;
1582 sbp->f_frsize = fs->fs_fsize;
1583 sbp->f_iosize = fs->fs_bsize;
1584 sbp->f_blocks = fs->fs_dsize;
1585 sbp->f_bfree = ffs_blkstofrags(fs, fs->fs_cstotal.cs_nbfree) +
1586 fs->fs_cstotal.cs_nffree + FFS_DBTOFSB(fs, fs->fs_pendingblocks);
1587 sbp->f_bresvd = ((u_int64_t) fs->fs_dsize * (u_int64_t)
1588 fs->fs_minfree) / (u_int64_t) 100;
1589 if (sbp->f_bfree > sbp->f_bresvd)
1590 sbp->f_bavail = sbp->f_bfree - sbp->f_bresvd;
1591 else
1592 sbp->f_bavail = 0;
1593 sbp->f_files = fs->fs_ncg * fs->fs_ipg - UFS_ROOTINO;
1594 sbp->f_ffree = fs->fs_cstotal.cs_nifree + fs->fs_pendinginodes;
1595 sbp->f_favail = sbp->f_ffree;
1596 sbp->f_fresvd = 0;
1597 mutex_exit(&ump->um_lock);
1598 copy_statvfs_info(sbp, mp);
1599
1600 return (0);
1601 }
1602
1603 struct ffs_sync_ctx {
1604 int waitfor;
1605 bool is_suspending;
1606 };
1607
1608 static bool
1609 ffs_sync_selector(void *cl, struct vnode *vp)
1610 {
1611 struct ffs_sync_ctx *c = cl;
1612 struct inode *ip;
1613
1614 ip = VTOI(vp);
1615 /*
1616 * Skip the vnode/inode if inaccessible.
1617 */
1618 if (ip == NULL || vp->v_type == VNON)
1619 return false;
1620
1621 /*
1622 * We deliberately update inode times here. This will
1623 * prevent a massive queue of updates accumulating, only
1624 * to be handled by a call to unmount.
1625 *
1626 * XXX It would be better to have the syncer trickle these
1627 * out. Adjustment needed to allow registering vnodes for
1628 * sync when the vnode is clean, but the inode dirty. Or
1629 * have ufs itself trickle out inode updates.
1630 *
1631 * If doing a lazy sync, we don't care about metadata or
1632 * data updates, because they are handled by each vnode's
1633 * synclist entry. In this case we are only interested in
1634 * writing back modified inodes.
1635 */
1636 if ((ip->i_flag & (IN_ACCESS | IN_CHANGE | IN_UPDATE |
1637 IN_MODIFY | IN_MODIFIED | IN_ACCESSED)) == 0 &&
1638 (c->waitfor == MNT_LAZY || (LIST_EMPTY(&vp->v_dirtyblkhd) &&
1639 UVM_OBJ_IS_CLEAN(&vp->v_uobj))))
1640 return false;
1641
1642 if (vp->v_type == VBLK && c->is_suspending)
1643 return false;
1644
1645 return true;
1646 }
1647
1648 /*
1649 * Go through the disk queues to initiate sandbagged IO;
1650 * go through the inodes to write those that have been modified;
1651 * initiate the writing of the super block if it has been modified.
1652 *
1653 * Note: we are always called with the filesystem marked `MPBUSY'.
1654 */
1655 int
1656 ffs_sync(struct mount *mp, int waitfor, kauth_cred_t cred)
1657 {
1658 struct vnode *vp;
1659 struct ufsmount *ump = VFSTOUFS(mp);
1660 struct fs *fs;
1661 struct vnode_iterator *marker;
1662 int error, allerror = 0;
1663 bool is_suspending;
1664 struct ffs_sync_ctx ctx;
1665
1666 fs = ump->um_fs;
1667 if (fs->fs_fmod != 0 && fs->fs_ronly != 0) { /* XXX */
1668 printf("fs = %s\n", fs->fs_fsmnt);
1669 panic("update: rofs mod");
1670 }
1671
1672 fstrans_start(mp, FSTRANS_SHARED);
1673 is_suspending = (fstrans_getstate(mp) == FSTRANS_SUSPENDING);
1674 /*
1675 * Write back each (modified) inode.
1676 */
1677 vfs_vnode_iterator_init(mp, &marker);
1678
1679 ctx.waitfor = waitfor;
1680 ctx.is_suspending = is_suspending;
1681 while ((vp = vfs_vnode_iterator_next(marker, ffs_sync_selector, &ctx)))
1682 {
1683 error = vn_lock(vp, LK_EXCLUSIVE);
1684 if (error) {
1685 vrele(vp);
1686 continue;
1687 }
1688 if (waitfor == MNT_LAZY) {
1689 error = UFS_WAPBL_BEGIN(vp->v_mount);
1690 if (!error) {
1691 error = ffs_update(vp, NULL, NULL,
1692 UPDATE_CLOSE);
1693 UFS_WAPBL_END(vp->v_mount);
1694 }
1695 } else {
1696 error = VOP_FSYNC(vp, cred, FSYNC_NOLOG |
1697 (waitfor == MNT_WAIT ? FSYNC_WAIT : 0), 0, 0);
1698 }
1699 if (error)
1700 allerror = error;
1701 vput(vp);
1702 }
1703 vfs_vnode_iterator_destroy(marker);
1704
1705 /*
1706 * Force stale file system control information to be flushed.
1707 */
1708 if (waitfor != MNT_LAZY && (ump->um_devvp->v_numoutput > 0 ||
1709 !LIST_EMPTY(&ump->um_devvp->v_dirtyblkhd))) {
1710 vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY);
1711 if ((error = VOP_FSYNC(ump->um_devvp, cred,
1712 (waitfor == MNT_WAIT ? FSYNC_WAIT : 0) | FSYNC_NOLOG,
1713 0, 0)) != 0)
1714 allerror = error;
1715 VOP_UNLOCK(ump->um_devvp);
1716 }
1717 #if defined(QUOTA) || defined(QUOTA2)
1718 qsync(mp);
1719 #endif
1720 /*
1721 * Write back modified superblock.
1722 */
1723 if (fs->fs_fmod != 0) {
1724 fs->fs_fmod = 0;
1725 fs->fs_time = time_second;
1726 error = UFS_WAPBL_BEGIN(mp);
1727 if (error)
1728 allerror = error;
1729 else {
1730 if ((error = ffs_cgupdate(ump, waitfor)))
1731 allerror = error;
1732 UFS_WAPBL_END(mp);
1733 }
1734 }
1735
1736 #ifdef WAPBL
1737 if (mp->mnt_wapbl) {
1738 error = wapbl_flush(mp->mnt_wapbl, 0);
1739 if (error)
1740 allerror = error;
1741 }
1742 #endif
1743
1744 fstrans_done(mp);
1745 return (allerror);
1746 }
1747
1748 /*
1749 * Read an inode from disk and initialize this vnode / inode pair.
1750 * Caller assures no other thread will try to load this inode.
1751 */
1752 int
1753 ffs_loadvnode(struct mount *mp, struct vnode *vp,
1754 const void *key, size_t key_len, const void **new_key)
1755 {
1756 ino_t ino;
1757 struct fs *fs;
1758 struct inode *ip;
1759 struct ufsmount *ump;
1760 struct buf *bp;
1761 dev_t dev;
1762 int error;
1763
1764 KASSERT(key_len == sizeof(ino));
1765 memcpy(&ino, key, key_len);
1766 ump = VFSTOUFS(mp);
1767 dev = ump->um_dev;
1768 fs = ump->um_fs;
1769
1770 /* Read in the disk contents for the inode. */
1771 error = bread(ump->um_devvp, FFS_FSBTODB(fs, ino_to_fsba(fs, ino)),
1772 (int)fs->fs_bsize, NOCRED, 0, &bp);
1773 if (error)
1774 return error;
1775
1776 /* Allocate and initialize inode. */
1777 ip = pool_cache_get(ffs_inode_cache, PR_WAITOK);
1778 memset(ip, 0, sizeof(struct inode));
1779 vp->v_tag = VT_UFS;
1780 vp->v_op = ffs_vnodeop_p;
1781 vp->v_vflag |= VV_LOCKSWORK;
1782 vp->v_data = ip;
1783 ip->i_vnode = vp;
1784 ip->i_ump = ump;
1785 ip->i_fs = fs;
1786 ip->i_dev = dev;
1787 ip->i_number = ino;
1788 #if defined(QUOTA) || defined(QUOTA2)
1789 ufsquota_init(ip);
1790 #endif
1791
1792 /* Initialize genfs node. */
1793 genfs_node_init(vp, &ffs_genfsops);
1794
1795 if (ip->i_ump->um_fstype == UFS1)
1796 ip->i_din.ffs1_din = pool_cache_get(ffs_dinode1_cache,
1797 PR_WAITOK);
1798 else
1799 ip->i_din.ffs2_din = pool_cache_get(ffs_dinode2_cache,
1800 PR_WAITOK);
1801 ffs_load_inode(bp, ip, fs, ino);
1802 brelse(bp, 0);
1803
1804 /* Initialize the vnode from the inode. */
1805 ufs_vinit(mp, ffs_specop_p, ffs_fifoop_p, &vp);
1806
1807 /* Finish inode initialization. */
1808 ip->i_devvp = ump->um_devvp;
1809 vref(ip->i_devvp);
1810
1811 /*
1812 * Ensure that uid and gid are correct. This is a temporary
1813 * fix until fsck has been changed to do the update.
1814 */
1815
1816 if (fs->fs_old_inodefmt < FS_44INODEFMT) { /* XXX */
1817 ip->i_uid = ip->i_ffs1_ouid; /* XXX */
1818 ip->i_gid = ip->i_ffs1_ogid; /* XXX */
1819 } /* XXX */
1820 uvm_vnp_setsize(vp, ip->i_size);
1821 *new_key = &ip->i_number;
1822 return 0;
1823 }
1824
1825 /*
1826 * File handle to vnode
1827 *
1828 * Have to be really careful about stale file handles:
1829 * - check that the inode number is valid
1830 * - call ffs_vget() to get the locked inode
1831 * - check for an unallocated inode (i_mode == 0)
1832 * - check that the given client host has export rights and return
1833 * those rights via. exflagsp and credanonp
1834 */
1835 int
1836 ffs_fhtovp(struct mount *mp, struct fid *fhp, struct vnode **vpp)
1837 {
1838 struct ufid ufh;
1839 struct fs *fs;
1840
1841 if (fhp->fid_len != sizeof(struct ufid))
1842 return EINVAL;
1843
1844 memcpy(&ufh, fhp, sizeof(ufh));
1845 fs = VFSTOUFS(mp)->um_fs;
1846 if (ufh.ufid_ino < UFS_ROOTINO ||
1847 ufh.ufid_ino >= fs->fs_ncg * fs->fs_ipg)
1848 return (ESTALE);
1849 return (ufs_fhtovp(mp, &ufh, vpp));
1850 }
1851
1852 /*
1853 * Vnode pointer to File handle
1854 */
1855 /* ARGSUSED */
1856 int
1857 ffs_vptofh(struct vnode *vp, struct fid *fhp, size_t *fh_size)
1858 {
1859 struct inode *ip;
1860 struct ufid ufh;
1861
1862 if (*fh_size < sizeof(struct ufid)) {
1863 *fh_size = sizeof(struct ufid);
1864 return E2BIG;
1865 }
1866 ip = VTOI(vp);
1867 *fh_size = sizeof(struct ufid);
1868 memset(&ufh, 0, sizeof(ufh));
1869 ufh.ufid_len = sizeof(struct ufid);
1870 ufh.ufid_ino = ip->i_number;
1871 ufh.ufid_gen = ip->i_gen;
1872 memcpy(fhp, &ufh, sizeof(ufh));
1873 return (0);
1874 }
1875
1876 void
1877 ffs_init(void)
1878 {
1879 if (ffs_initcount++ > 0)
1880 return;
1881
1882 ffs_inode_cache = pool_cache_init(sizeof(struct inode), 0, 0, 0,
1883 "ffsino", NULL, IPL_NONE, NULL, NULL, NULL);
1884 ffs_dinode1_cache = pool_cache_init(sizeof(struct ufs1_dinode), 0, 0, 0,
1885 "ffsdino1", NULL, IPL_NONE, NULL, NULL, NULL);
1886 ffs_dinode2_cache = pool_cache_init(sizeof(struct ufs2_dinode), 0, 0, 0,
1887 "ffsdino2", NULL, IPL_NONE, NULL, NULL, NULL);
1888 ufs_init();
1889 }
1890
1891 void
1892 ffs_reinit(void)
1893 {
1894
1895 ufs_reinit();
1896 }
1897
1898 void
1899 ffs_done(void)
1900 {
1901 if (--ffs_initcount > 0)
1902 return;
1903
1904 ufs_done();
1905 pool_cache_destroy(ffs_dinode2_cache);
1906 pool_cache_destroy(ffs_dinode1_cache);
1907 pool_cache_destroy(ffs_inode_cache);
1908 }
1909
1910 /*
1911 * Write a superblock and associated information back to disk.
1912 */
1913 int
1914 ffs_sbupdate(struct ufsmount *mp, int waitfor)
1915 {
1916 struct fs *fs = mp->um_fs;
1917 struct buf *bp;
1918 int error = 0;
1919 u_int32_t saveflag;
1920
1921 error = ffs_getblk(mp->um_devvp,
1922 fs->fs_sblockloc / DEV_BSIZE, FFS_NOBLK,
1923 fs->fs_sbsize, false, &bp);
1924 if (error)
1925 return error;
1926 saveflag = fs->fs_flags & FS_INTERNAL;
1927 fs->fs_flags &= ~FS_INTERNAL;
1928
1929 memcpy(bp->b_data, fs, fs->fs_sbsize);
1930
1931 ffs_oldfscompat_write((struct fs *)bp->b_data, mp);
1932 #ifdef FFS_EI
1933 if (mp->um_flags & UFS_NEEDSWAP)
1934 ffs_sb_swap((struct fs *)bp->b_data, (struct fs *)bp->b_data);
1935 #endif
1936 fs->fs_flags |= saveflag;
1937
1938 if (waitfor == MNT_WAIT)
1939 error = bwrite(bp);
1940 else
1941 bawrite(bp);
1942 return (error);
1943 }
1944
1945 int
1946 ffs_cgupdate(struct ufsmount *mp, int waitfor)
1947 {
1948 struct fs *fs = mp->um_fs;
1949 struct buf *bp;
1950 int blks;
1951 void *space;
1952 int i, size, error = 0, allerror = 0;
1953
1954 allerror = ffs_sbupdate(mp, waitfor);
1955 blks = howmany(fs->fs_cssize, fs->fs_fsize);
1956 space = fs->fs_csp;
1957 for (i = 0; i < blks; i += fs->fs_frag) {
1958 size = fs->fs_bsize;
1959 if (i + fs->fs_frag > blks)
1960 size = (blks - i) * fs->fs_fsize;
1961 error = ffs_getblk(mp->um_devvp, FFS_FSBTODB(fs, fs->fs_csaddr + i),
1962 FFS_NOBLK, size, false, &bp);
1963 if (error)
1964 break;
1965 #ifdef FFS_EI
1966 if (mp->um_flags & UFS_NEEDSWAP)
1967 ffs_csum_swap((struct csum*)space,
1968 (struct csum*)bp->b_data, size);
1969 else
1970 #endif
1971 memcpy(bp->b_data, space, (u_int)size);
1972 space = (char *)space + size;
1973 if (waitfor == MNT_WAIT)
1974 error = bwrite(bp);
1975 else
1976 bawrite(bp);
1977 }
1978 if (!allerror && error)
1979 allerror = error;
1980 return (allerror);
1981 }
1982
1983 int
1984 ffs_extattrctl(struct mount *mp, int cmd, struct vnode *vp,
1985 int attrnamespace, const char *attrname)
1986 {
1987 #ifdef UFS_EXTATTR
1988 /*
1989 * File-backed extended attributes are only supported on UFS1.
1990 * UFS2 has native extended attributes.
1991 */
1992 if (VFSTOUFS(mp)->um_fstype == UFS1)
1993 return (ufs_extattrctl(mp, cmd, vp, attrnamespace, attrname));
1994 #endif
1995 return (vfs_stdextattrctl(mp, cmd, vp, attrnamespace, attrname));
1996 }
1997
1998 int
1999 ffs_suspendctl(struct mount *mp, int cmd)
2000 {
2001 int error;
2002 struct lwp *l = curlwp;
2003
2004 switch (cmd) {
2005 case SUSPEND_SUSPEND:
2006 if ((error = fstrans_setstate(mp, FSTRANS_SUSPENDING)) != 0)
2007 return error;
2008 error = ffs_sync(mp, MNT_WAIT, l->l_proc->p_cred);
2009 if (error == 0)
2010 error = fstrans_setstate(mp, FSTRANS_SUSPENDED);
2011 #ifdef WAPBL
2012 if (error == 0 && mp->mnt_wapbl)
2013 error = wapbl_flush(mp->mnt_wapbl, 1);
2014 #endif
2015 if (error != 0) {
2016 (void) fstrans_setstate(mp, FSTRANS_NORMAL);
2017 return error;
2018 }
2019 return 0;
2020
2021 case SUSPEND_RESUME:
2022 return fstrans_setstate(mp, FSTRANS_NORMAL);
2023
2024 default:
2025 return EINVAL;
2026 }
2027 }
2028
2029 /*
2030 * Synch vnode for a mounted file system.
2031 */
2032 static int
2033 ffs_vfs_fsync(vnode_t *vp, int flags)
2034 {
2035 int error, i, pflags;
2036 #ifdef WAPBL
2037 struct mount *mp;
2038 #endif
2039
2040 KASSERT(vp->v_type == VBLK);
2041 KASSERT(spec_node_getmountedfs(vp) != NULL);
2042
2043 /*
2044 * Flush all dirty data associated with the vnode.
2045 */
2046 pflags = PGO_ALLPAGES | PGO_CLEANIT;
2047 if ((flags & FSYNC_WAIT) != 0)
2048 pflags |= PGO_SYNCIO;
2049 mutex_enter(vp->v_interlock);
2050 error = VOP_PUTPAGES(vp, 0, 0, pflags);
2051 if (error)
2052 return error;
2053
2054 #ifdef WAPBL
2055 mp = spec_node_getmountedfs(vp);
2056 if (mp && mp->mnt_wapbl) {
2057 /*
2058 * Don't bother writing out metadata if the syncer is
2059 * making the request. We will let the sync vnode
2060 * write it out in a single burst through a call to
2061 * VFS_SYNC().
2062 */
2063 if ((flags & (FSYNC_DATAONLY | FSYNC_LAZY | FSYNC_NOLOG)) != 0)
2064 return 0;
2065
2066 /*
2067 * Don't flush the log if the vnode being flushed
2068 * contains no dirty buffers that could be in the log.
2069 */
2070 if (!LIST_EMPTY(&vp->v_dirtyblkhd)) {
2071 error = wapbl_flush(mp->mnt_wapbl, 0);
2072 if (error)
2073 return error;
2074 }
2075
2076 if ((flags & FSYNC_WAIT) != 0) {
2077 mutex_enter(vp->v_interlock);
2078 while (vp->v_numoutput)
2079 cv_wait(&vp->v_cv, vp->v_interlock);
2080 mutex_exit(vp->v_interlock);
2081 }
2082
2083 return 0;
2084 }
2085 #endif /* WAPBL */
2086
2087 error = vflushbuf(vp, flags);
2088 if (error == 0 && (flags & FSYNC_CACHE) != 0) {
2089 i = 1;
2090 (void)VOP_IOCTL(vp, DIOCCACHESYNC, &i, FWRITE,
2091 kauth_cred_get());
2092 }
2093
2094 return error;
2095 }
2096