ffs_vfsops.c revision 1.257.2.5 1 /* $NetBSD: ffs_vfsops.c,v 1.257.2.5 2010/04/30 14:44:34 uebayasi 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 1.257.2.5 2010/04/30 14:44:34 uebayasi Exp $");
65
66 #if defined(_KERNEL_OPT)
67 #include "opt_ffs.h"
68 #include "opt_quota.h"
69 #include "opt_wapbl.h"
70 #include "opt_xip.h"
71 #endif
72
73 #include <sys/param.h>
74 #include <sys/systm.h>
75 #include <sys/namei.h>
76 #include <sys/proc.h>
77 #include <sys/kernel.h>
78 #include <sys/vnode.h>
79 #include <sys/socket.h>
80 #include <sys/mount.h>
81 #include <sys/buf.h>
82 #include <sys/device.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/malloc.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 /* how many times ffs_init() was called */
119 int ffs_initcount = 0;
120
121 extern const struct vnodeopv_desc ffs_vnodeop_opv_desc;
122 extern const struct vnodeopv_desc ffs_specop_opv_desc;
123 extern const struct vnodeopv_desc ffs_fifoop_opv_desc;
124
125 const struct vnodeopv_desc * const ffs_vnodeopv_descs[] = {
126 &ffs_vnodeop_opv_desc,
127 &ffs_specop_opv_desc,
128 &ffs_fifoop_opv_desc,
129 NULL,
130 };
131
132 struct vfsops ffs_vfsops = {
133 MOUNT_FFS,
134 sizeof (struct ufs_args),
135 ffs_mount,
136 ufs_start,
137 ffs_unmount,
138 ufs_root,
139 ufs_quotactl,
140 ffs_statvfs,
141 ffs_sync,
142 ffs_vget,
143 ffs_fhtovp,
144 ffs_vptofh,
145 ffs_init,
146 ffs_reinit,
147 ffs_done,
148 ffs_mountroot,
149 ffs_snapshot,
150 ffs_extattrctl,
151 ffs_suspendctl,
152 genfs_renamelock_enter,
153 genfs_renamelock_exit,
154 ffs_vfs_fsync,
155 ffs_vnodeopv_descs,
156 0,
157 { NULL, NULL },
158 };
159
160 static const struct genfs_ops ffs_genfsops = {
161 .gop_size = ffs_gop_size,
162 .gop_alloc = ufs_gop_alloc,
163 .gop_write = genfs_gop_write,
164 .gop_markupdate = ufs_gop_markupdate,
165 };
166
167 static const struct ufs_ops ffs_ufsops = {
168 .uo_itimes = ffs_itimes,
169 .uo_update = ffs_update,
170 .uo_truncate = ffs_truncate,
171 .uo_valloc = ffs_valloc,
172 .uo_vfree = ffs_vfree,
173 .uo_balloc = ffs_balloc,
174 .uo_unmark_vnode = (void (*)(vnode_t *))nullop,
175 };
176
177 static int
178 ffs_modcmd(modcmd_t cmd, void *arg)
179 {
180 int error;
181
182 #if 0
183 extern int doasyncfree;
184 #endif
185 extern int ffs_log_changeopt;
186
187 switch (cmd) {
188 case MODULE_CMD_INIT:
189 error = vfs_attach(&ffs_vfsops);
190 if (error != 0)
191 break;
192
193 sysctl_createv(&ffs_sysctl_log, 0, NULL, NULL,
194 CTLFLAG_PERMANENT,
195 CTLTYPE_NODE, "vfs", NULL,
196 NULL, 0, NULL, 0,
197 CTL_VFS, CTL_EOL);
198 sysctl_createv(&ffs_sysctl_log, 0, NULL, NULL,
199 CTLFLAG_PERMANENT,
200 CTLTYPE_NODE, "ffs",
201 SYSCTL_DESCR("Berkeley Fast File System"),
202 NULL, 0, NULL, 0,
203 CTL_VFS, 1, CTL_EOL);
204
205 /*
206 * @@@ should we even bother with these first three?
207 */
208 sysctl_createv(&ffs_sysctl_log, 0, NULL, NULL,
209 CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
210 CTLTYPE_INT, "doclusterread", NULL,
211 sysctl_notavail, 0, NULL, 0,
212 CTL_VFS, 1, FFS_CLUSTERREAD, CTL_EOL);
213 sysctl_createv(&ffs_sysctl_log, 0, NULL, NULL,
214 CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
215 CTLTYPE_INT, "doclusterwrite", NULL,
216 sysctl_notavail, 0, NULL, 0,
217 CTL_VFS, 1, FFS_CLUSTERWRITE, CTL_EOL);
218 sysctl_createv(&ffs_sysctl_log, 0, NULL, NULL,
219 CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
220 CTLTYPE_INT, "doreallocblks", NULL,
221 sysctl_notavail, 0, NULL, 0,
222 CTL_VFS, 1, FFS_REALLOCBLKS, CTL_EOL);
223 #if 0
224 sysctl_createv(&ffs_sysctl_log, 0, NULL, NULL,
225 CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
226 CTLTYPE_INT, "doasyncfree",
227 SYSCTL_DESCR("Release dirty blocks asynchronously"),
228 NULL, 0, &doasyncfree, 0,
229 CTL_VFS, 1, FFS_ASYNCFREE, CTL_EOL);
230 #endif
231 sysctl_createv(&ffs_sysctl_log, 0, NULL, NULL,
232 CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
233 CTLTYPE_INT, "log_changeopt",
234 SYSCTL_DESCR("Log changes in optimization strategy"),
235 NULL, 0, &ffs_log_changeopt, 0,
236 CTL_VFS, 1, FFS_LOG_CHANGEOPT, CTL_EOL);
237 break;
238 case MODULE_CMD_FINI:
239 error = vfs_detach(&ffs_vfsops);
240 if (error != 0)
241 break;
242 sysctl_teardown(&ffs_sysctl_log);
243 break;
244 default:
245 error = ENOTTY;
246 break;
247 }
248
249 return (error);
250 }
251
252 pool_cache_t ffs_inode_cache;
253 pool_cache_t ffs_dinode1_cache;
254 pool_cache_t ffs_dinode2_cache;
255
256 static void ffs_oldfscompat_read(struct fs *, struct ufsmount *, daddr_t);
257 static void ffs_oldfscompat_write(struct fs *, struct ufsmount *);
258
259 /*
260 * Called by main() when ffs is going to be mounted as root.
261 */
262
263 int
264 ffs_mountroot(void)
265 {
266 struct fs *fs;
267 struct mount *mp;
268 struct lwp *l = curlwp; /* XXX */
269 struct ufsmount *ump;
270 int error;
271
272 if (device_class(root_device) != DV_DISK)
273 return (ENODEV);
274
275 if ((error = vfs_rootmountalloc(MOUNT_FFS, "root_device", &mp))) {
276 vrele(rootvp);
277 return (error);
278 }
279
280 /*
281 * We always need to be able to mount the root file system.
282 */
283 mp->mnt_flag |= MNT_FORCE;
284 if ((error = ffs_mountfs(rootvp, mp, l)) != 0) {
285 vfs_unbusy(mp, false, NULL);
286 vfs_destroy(mp);
287 return (error);
288 }
289 mp->mnt_flag &= ~MNT_FORCE;
290 mutex_enter(&mountlist_lock);
291 CIRCLEQ_INSERT_TAIL(&mountlist, mp, mnt_list);
292 mutex_exit(&mountlist_lock);
293 ump = VFSTOUFS(mp);
294 fs = ump->um_fs;
295 memset(fs->fs_fsmnt, 0, sizeof(fs->fs_fsmnt));
296 (void)copystr(mp->mnt_stat.f_mntonname, fs->fs_fsmnt, MNAMELEN - 1, 0);
297 (void)ffs_statvfs(mp, &mp->mnt_stat);
298 vfs_unbusy(mp, false, NULL);
299 setrootfstime((time_t)fs->fs_time);
300 return (0);
301 }
302
303 /*
304 * VFS Operations.
305 *
306 * mount system call
307 */
308 int
309 ffs_mount(struct mount *mp, const char *path, void *data, size_t *data_len)
310 {
311 struct lwp *l = curlwp;
312 struct vnode *devvp = NULL;
313 struct ufs_args *args = data;
314 struct ufsmount *ump = NULL;
315 struct fs *fs;
316 int error = 0, flags, update;
317 mode_t accessmode;
318
319 if (*data_len < sizeof *args)
320 return EINVAL;
321
322 if (mp->mnt_flag & MNT_GETARGS) {
323 ump = VFSTOUFS(mp);
324 if (ump == NULL)
325 return EIO;
326 args->fspec = NULL;
327 *data_len = sizeof *args;
328 return 0;
329 }
330
331 update = mp->mnt_flag & MNT_UPDATE;
332
333 /* Check arguments */
334 if (args->fspec != NULL) {
335 /*
336 * Look up the name and verify that it's sane.
337 */
338 error = namei_simple_user(args->fspec,
339 NSM_FOLLOW_NOEMULROOT, &devvp);
340 if (error != 0)
341 return (error);
342
343 if (!update) {
344 /*
345 * Be sure this is a valid block device
346 */
347 if (devvp->v_type != VBLK)
348 error = ENOTBLK;
349 else if (bdevsw_lookup(devvp->v_rdev) == NULL)
350 error = ENXIO;
351 } else {
352 /*
353 * Be sure we're still naming the same device
354 * used for our initial mount
355 */
356 ump = VFSTOUFS(mp);
357 if (devvp != ump->um_devvp) {
358 if (devvp->v_rdev != ump->um_devvp->v_rdev)
359 error = EINVAL;
360 else {
361 vrele(devvp);
362 devvp = ump->um_devvp;
363 vref(devvp);
364 }
365 }
366 }
367 } else {
368 if (!update) {
369 /* New mounts must have a filename for the device */
370 return (EINVAL);
371 } else {
372 /* Use the extant mount */
373 ump = VFSTOUFS(mp);
374 devvp = ump->um_devvp;
375 vref(devvp);
376 }
377 }
378
379 /*
380 * If mount by non-root, then verify that user has necessary
381 * permissions on the device.
382 *
383 * Permission to update a mount is checked higher, so here we presume
384 * updating the mount is okay (for example, as far as securelevel goes)
385 * which leaves us with the normal check.
386 */
387 if (error == 0) {
388 accessmode = VREAD;
389 if (update ?
390 (mp->mnt_iflag & IMNT_WANTRDWR) != 0 :
391 (mp->mnt_flag & MNT_RDONLY) == 0)
392 accessmode |= VWRITE;
393 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
394 error = genfs_can_mount(devvp, accessmode, l->l_cred);
395 VOP_UNLOCK(devvp, 0);
396 }
397
398 if (error) {
399 vrele(devvp);
400 return (error);
401 }
402
403 #ifdef WAPBL
404 /* WAPBL can only be enabled on a r/w mount. */
405 if ((mp->mnt_flag & MNT_RDONLY) && !(mp->mnt_iflag & IMNT_WANTRDWR)) {
406 mp->mnt_flag &= ~MNT_LOG;
407 }
408 #else /* !WAPBL */
409 mp->mnt_flag &= ~MNT_LOG;
410 #endif /* !WAPBL */
411
412 if (!update) {
413 int xflags;
414
415 if (mp->mnt_flag & MNT_RDONLY)
416 xflags = FREAD;
417 else
418 xflags = FREAD | FWRITE;
419 error = VOP_OPEN(devvp, xflags, FSCRED);
420 if (error)
421 goto fail;
422 error = ffs_mountfs(devvp, mp, l);
423 if (error) {
424 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
425 (void)VOP_CLOSE(devvp, xflags, NOCRED);
426 VOP_UNLOCK(devvp, 0);
427 goto fail;
428 }
429
430 ump = VFSTOUFS(mp);
431 fs = ump->um_fs;
432 } else {
433 /*
434 * Update the mount.
435 */
436
437 /*
438 * The initial mount got a reference on this
439 * device, so drop the one obtained via
440 * namei(), above.
441 */
442 vrele(devvp);
443
444 ump = VFSTOUFS(mp);
445 fs = ump->um_fs;
446 if (fs->fs_ronly == 0 && (mp->mnt_flag & MNT_RDONLY)) {
447 /*
448 * Changing from r/w to r/o
449 */
450 flags = WRITECLOSE;
451 if (mp->mnt_flag & MNT_FORCE)
452 flags |= FORCECLOSE;
453 error = ffs_flushfiles(mp, flags, l);
454 if (error == 0)
455 error = UFS_WAPBL_BEGIN(mp);
456 if (error == 0 &&
457 ffs_cgupdate(ump, MNT_WAIT) == 0 &&
458 fs->fs_clean & FS_WASCLEAN) {
459 if (mp->mnt_flag & MNT_SOFTDEP)
460 fs->fs_flags &= ~FS_DOSOFTDEP;
461 fs->fs_clean = FS_ISCLEAN;
462 (void) ffs_sbupdate(ump, MNT_WAIT);
463 }
464 if (error == 0)
465 UFS_WAPBL_END(mp);
466 if (error)
467 return (error);
468 }
469
470 #ifdef WAPBL
471 if ((mp->mnt_flag & MNT_LOG) == 0) {
472 error = ffs_wapbl_stop(mp, mp->mnt_flag & MNT_FORCE);
473 if (error)
474 return error;
475 }
476 #endif /* WAPBL */
477
478 if (fs->fs_ronly == 0 && (mp->mnt_flag & MNT_RDONLY)) {
479 /*
480 * Finish change from r/w to r/o
481 */
482 fs->fs_ronly = 1;
483 fs->fs_fmod = 0;
484 }
485
486 if (mp->mnt_flag & MNT_RELOAD) {
487 error = ffs_reload(mp, l->l_cred, l);
488 if (error)
489 return (error);
490 }
491
492 if (fs->fs_ronly && (mp->mnt_iflag & IMNT_WANTRDWR)) {
493 /*
494 * Changing from read-only to read/write
495 */
496 fs->fs_ronly = 0;
497 fs->fs_clean <<= 1;
498 fs->fs_fmod = 1;
499 #ifdef WAPBL
500 if (fs->fs_flags & FS_DOWAPBL) {
501 printf("%s: replaying log to disk\n",
502 fs->fs_fsmnt);
503 KDASSERT(mp->mnt_wapbl_replay);
504 error = wapbl_replay_write(mp->mnt_wapbl_replay,
505 devvp);
506 if (error) {
507 return error;
508 }
509 wapbl_replay_stop(mp->mnt_wapbl_replay);
510 fs->fs_clean = FS_WASCLEAN;
511 }
512 #endif /* WAPBL */
513 if (fs->fs_snapinum[0] != 0)
514 ffs_snapshot_mount(mp);
515 }
516
517 #ifdef WAPBL
518 error = ffs_wapbl_start(mp);
519 if (error)
520 return error;
521 #endif /* WAPBL */
522
523 if (args->fspec == NULL)
524 return 0;
525 }
526
527 error = set_statvfs_info(path, UIO_USERSPACE, args->fspec,
528 UIO_USERSPACE, mp->mnt_op->vfs_name, mp, l);
529 if (error == 0)
530 (void)strncpy(fs->fs_fsmnt, mp->mnt_stat.f_mntonname,
531 sizeof(fs->fs_fsmnt));
532 fs->fs_flags &= ~FS_DOSOFTDEP;
533 if (fs->fs_fmod != 0) { /* XXX */
534 int err;
535
536 fs->fs_fmod = 0;
537 if (fs->fs_clean & FS_WASCLEAN)
538 fs->fs_time = time_second;
539 else {
540 printf("%s: file system not clean (fs_clean=%#x); "
541 "please fsck(8)\n", mp->mnt_stat.f_mntfromname,
542 fs->fs_clean);
543 printf("%s: lost blocks %" PRId64 " files %d\n",
544 mp->mnt_stat.f_mntfromname, fs->fs_pendingblocks,
545 fs->fs_pendinginodes);
546 }
547 err = UFS_WAPBL_BEGIN(mp);
548 if (err == 0) {
549 (void) ffs_cgupdate(ump, MNT_WAIT);
550 UFS_WAPBL_END(mp);
551 }
552 }
553 if ((mp->mnt_flag & MNT_SOFTDEP) != 0) {
554 printf("%s: `-o softdep' is no longer supported, "
555 "consider `-o log'\n", mp->mnt_stat.f_mntfromname);
556 mp->mnt_flag &= ~MNT_SOFTDEP;
557 }
558
559 return (error);
560
561 fail:
562 vrele(devvp);
563 return (error);
564 }
565
566 /*
567 * Reload all incore data for a filesystem (used after running fsck on
568 * the root filesystem and finding things to fix). The filesystem must
569 * be mounted read-only.
570 *
571 * Things to do to update the mount:
572 * 1) invalidate all cached meta-data.
573 * 2) re-read superblock from disk.
574 * 3) re-read summary information from disk.
575 * 4) invalidate all inactive vnodes.
576 * 5) invalidate all cached file data.
577 * 6) re-read inode data for all active vnodes.
578 */
579 int
580 ffs_reload(struct mount *mp, kauth_cred_t cred, struct lwp *l)
581 {
582 struct vnode *vp, *mvp, *devvp;
583 struct inode *ip;
584 void *space;
585 struct buf *bp;
586 struct fs *fs, *newfs;
587 struct partinfo dpart;
588 int i, bsize, blks, error;
589 int32_t *lp;
590 struct ufsmount *ump;
591 daddr_t sblockloc;
592
593 if ((mp->mnt_flag & MNT_RDONLY) == 0)
594 return (EINVAL);
595
596 ump = VFSTOUFS(mp);
597 /*
598 * Step 1: invalidate all cached meta-data.
599 */
600 devvp = ump->um_devvp;
601 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
602 error = vinvalbuf(devvp, 0, cred, l, 0, 0);
603 VOP_UNLOCK(devvp, 0);
604 if (error)
605 panic("ffs_reload: dirty1");
606 /*
607 * Step 2: re-read superblock from disk.
608 */
609 fs = ump->um_fs;
610
611 /* XXX we don't handle possibility that superblock moved. */
612 error = bread(devvp, fs->fs_sblockloc / DEV_BSIZE, fs->fs_sbsize,
613 NOCRED, 0, &bp);
614 if (error) {
615 brelse(bp, 0);
616 return (error);
617 }
618 newfs = malloc(fs->fs_sbsize, M_UFSMNT, M_WAITOK);
619 memcpy(newfs, bp->b_data, fs->fs_sbsize);
620 #ifdef FFS_EI
621 if (ump->um_flags & UFS_NEEDSWAP) {
622 ffs_sb_swap((struct fs*)bp->b_data, newfs);
623 fs->fs_flags |= FS_SWAPPED;
624 } else
625 #endif
626 fs->fs_flags &= ~FS_SWAPPED;
627 if ((newfs->fs_magic != FS_UFS1_MAGIC &&
628 newfs->fs_magic != FS_UFS2_MAGIC)||
629 newfs->fs_bsize > MAXBSIZE ||
630 newfs->fs_bsize < sizeof(struct fs)) {
631 brelse(bp, 0);
632 free(newfs, M_UFSMNT);
633 return (EIO); /* XXX needs translation */
634 }
635 /* Store off old fs_sblockloc for fs_oldfscompat_read. */
636 sblockloc = fs->fs_sblockloc;
637 /*
638 * Copy pointer fields back into superblock before copying in XXX
639 * new superblock. These should really be in the ufsmount. XXX
640 * Note that important parameters (eg fs_ncg) are unchanged.
641 */
642 newfs->fs_csp = fs->fs_csp;
643 newfs->fs_maxcluster = fs->fs_maxcluster;
644 newfs->fs_contigdirs = fs->fs_contigdirs;
645 newfs->fs_ronly = fs->fs_ronly;
646 newfs->fs_active = fs->fs_active;
647 memcpy(fs, newfs, (u_int)fs->fs_sbsize);
648 brelse(bp, 0);
649 free(newfs, M_UFSMNT);
650
651 /* Recheck for apple UFS filesystem */
652 ump->um_flags &= ~UFS_ISAPPLEUFS;
653 /* First check to see if this is tagged as an Apple UFS filesystem
654 * in the disklabel
655 */
656 if ((VOP_IOCTL(devvp, DIOCGPART, &dpart, FREAD, cred) == 0) &&
657 (dpart.part->p_fstype == FS_APPLEUFS)) {
658 ump->um_flags |= UFS_ISAPPLEUFS;
659 }
660 #ifdef APPLE_UFS
661 else {
662 /* Manually look for an apple ufs label, and if a valid one
663 * is found, then treat it like an Apple UFS filesystem anyway
664 */
665 error = bread(devvp, (daddr_t)(APPLEUFS_LABEL_OFFSET / DEV_BSIZE),
666 APPLEUFS_LABEL_SIZE, cred, 0, &bp);
667 if (error) {
668 brelse(bp, 0);
669 return (error);
670 }
671 error = ffs_appleufs_validate(fs->fs_fsmnt,
672 (struct appleufslabel *)bp->b_data, NULL);
673 if (error == 0)
674 ump->um_flags |= UFS_ISAPPLEUFS;
675 brelse(bp, 0);
676 bp = NULL;
677 }
678 #else
679 if (ump->um_flags & UFS_ISAPPLEUFS)
680 return (EIO);
681 #endif
682
683 if (UFS_MPISAPPLEUFS(ump)) {
684 /* see comment about NeXT below */
685 ump->um_maxsymlinklen = APPLEUFS_MAXSYMLINKLEN;
686 ump->um_dirblksiz = APPLEUFS_DIRBLKSIZ;
687 mp->mnt_iflag |= IMNT_DTYPE;
688 } else {
689 ump->um_maxsymlinklen = fs->fs_maxsymlinklen;
690 ump->um_dirblksiz = DIRBLKSIZ;
691 if (ump->um_maxsymlinklen > 0)
692 mp->mnt_iflag |= IMNT_DTYPE;
693 else
694 mp->mnt_iflag &= ~IMNT_DTYPE;
695 }
696 ffs_oldfscompat_read(fs, ump, sblockloc);
697
698 mutex_enter(&ump->um_lock);
699 ump->um_maxfilesize = fs->fs_maxfilesize;
700 if (fs->fs_flags & ~(FS_KNOWN_FLAGS | FS_INTERNAL)) {
701 uprintf("%s: unknown ufs flags: 0x%08"PRIx32"%s\n",
702 mp->mnt_stat.f_mntonname, fs->fs_flags,
703 (mp->mnt_flag & MNT_FORCE) ? "" : ", not mounting");
704 if ((mp->mnt_flag & MNT_FORCE) == 0) {
705 mutex_exit(&ump->um_lock);
706 return (EINVAL);
707 }
708 }
709 if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) {
710 fs->fs_pendingblocks = 0;
711 fs->fs_pendinginodes = 0;
712 }
713 mutex_exit(&ump->um_lock);
714
715 ffs_statvfs(mp, &mp->mnt_stat);
716 /*
717 * Step 3: re-read summary information from disk.
718 */
719 blks = howmany(fs->fs_cssize, fs->fs_fsize);
720 space = fs->fs_csp;
721 for (i = 0; i < blks; i += fs->fs_frag) {
722 bsize = fs->fs_bsize;
723 if (i + fs->fs_frag > blks)
724 bsize = (blks - i) * fs->fs_fsize;
725 error = bread(devvp, fsbtodb(fs, fs->fs_csaddr + i), bsize,
726 NOCRED, 0, &bp);
727 if (error) {
728 brelse(bp, 0);
729 return (error);
730 }
731 #ifdef FFS_EI
732 if (UFS_FSNEEDSWAP(fs))
733 ffs_csum_swap((struct csum *)bp->b_data,
734 (struct csum *)space, bsize);
735 else
736 #endif
737 memcpy(space, bp->b_data, (size_t)bsize);
738 space = (char *)space + bsize;
739 brelse(bp, 0);
740 }
741 if (fs->fs_snapinum[0] != 0)
742 ffs_snapshot_mount(mp);
743 /*
744 * We no longer know anything about clusters per cylinder group.
745 */
746 if (fs->fs_contigsumsize > 0) {
747 lp = fs->fs_maxcluster;
748 for (i = 0; i < fs->fs_ncg; i++)
749 *lp++ = fs->fs_contigsumsize;
750 }
751
752 /* Allocate a marker vnode. */
753 if ((mvp = vnalloc(mp)) == NULL)
754 return ENOMEM;
755 /*
756 * NOTE: not using the TAILQ_FOREACH here since in this loop vgone()
757 * and vclean() can be called indirectly
758 */
759 mutex_enter(&mntvnode_lock);
760 loop:
761 for (vp = TAILQ_FIRST(&mp->mnt_vnodelist); vp; vp = vunmark(mvp)) {
762 vmark(mvp, vp);
763 if (vp->v_mount != mp || vismarker(vp))
764 continue;
765 /*
766 * Step 4: invalidate all inactive vnodes.
767 */
768 if (vrecycle(vp, &mntvnode_lock, l)) {
769 mutex_enter(&mntvnode_lock);
770 (void)vunmark(mvp);
771 goto loop;
772 }
773 /*
774 * Step 5: invalidate all cached file data.
775 */
776 mutex_enter(&vp->v_interlock);
777 mutex_exit(&mntvnode_lock);
778 if (vget(vp, LK_EXCLUSIVE | LK_INTERLOCK)) {
779 (void)vunmark(mvp);
780 goto loop;
781 }
782 if (vinvalbuf(vp, 0, cred, l, 0, 0))
783 panic("ffs_reload: dirty2");
784 /*
785 * Step 6: re-read inode data for all active vnodes.
786 */
787 ip = VTOI(vp);
788 error = bread(devvp, fsbtodb(fs, ino_to_fsba(fs, ip->i_number)),
789 (int)fs->fs_bsize, NOCRED, 0, &bp);
790 if (error) {
791 brelse(bp, 0);
792 vput(vp);
793 (void)vunmark(mvp);
794 break;
795 }
796 ffs_load_inode(bp, ip, fs, ip->i_number);
797 brelse(bp, 0);
798 vput(vp);
799 mutex_enter(&mntvnode_lock);
800 }
801 mutex_exit(&mntvnode_lock);
802 vnfree(mvp);
803 return (error);
804 }
805
806 /*
807 * Possible superblock locations ordered from most to least likely.
808 */
809 static const int sblock_try[] = SBLOCKSEARCH;
810
811 /*
812 * Common code for mount and mountroot
813 */
814 int
815 ffs_mountfs(struct vnode *devvp, struct mount *mp, struct lwp *l)
816 {
817 struct ufsmount *ump;
818 struct buf *bp;
819 struct fs *fs;
820 dev_t dev;
821 struct partinfo dpart;
822 void *space;
823 daddr_t sblockloc, fsblockloc;
824 int blks, fstype;
825 int error, i, bsize, ronly, bset = 0;
826 #ifdef FFS_EI
827 int needswap = 0; /* keep gcc happy */
828 #endif
829 int32_t *lp;
830 kauth_cred_t cred;
831 u_int32_t sbsize = 8192; /* keep gcc happy*/
832
833 dev = devvp->v_rdev;
834 cred = l ? l->l_cred : NOCRED;
835
836 /* Flush out any old buffers remaining from a previous use. */
837 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
838 error = vinvalbuf(devvp, V_SAVE, cred, l, 0, 0);
839 VOP_UNLOCK(devvp, 0);
840 if (error)
841 return (error);
842
843 ronly = (mp->mnt_flag & MNT_RDONLY) != 0;
844
845 bp = NULL;
846 ump = NULL;
847 fs = NULL;
848 sblockloc = 0;
849 fstype = 0;
850
851 error = fstrans_mount(mp);
852 if (error)
853 return error;
854
855 ump = malloc(sizeof *ump, M_UFSMNT, M_WAITOK);
856 memset(ump, 0, sizeof *ump);
857 mutex_init(&ump->um_lock, MUTEX_DEFAULT, IPL_NONE);
858 error = ffs_snapshot_init(ump);
859 if (error)
860 goto out;
861 ump->um_ops = &ffs_ufsops;
862
863 #ifdef WAPBL
864 sbagain:
865 #endif
866 /*
867 * Try reading the superblock in each of its possible locations.
868 */
869 for (i = 0; ; i++) {
870 if (bp != NULL) {
871 brelse(bp, BC_NOCACHE);
872 bp = NULL;
873 }
874 if (sblock_try[i] == -1) {
875 error = EINVAL;
876 fs = NULL;
877 goto out;
878 }
879 error = bread(devvp, sblock_try[i] / DEV_BSIZE, SBLOCKSIZE, cred,
880 0, &bp);
881 if (error) {
882 fs = NULL;
883 goto out;
884 }
885 fs = (struct fs*)bp->b_data;
886 fsblockloc = sblockloc = sblock_try[i];
887 if (fs->fs_magic == FS_UFS1_MAGIC) {
888 sbsize = fs->fs_sbsize;
889 fstype = UFS1;
890 #ifdef FFS_EI
891 needswap = 0;
892 } else if (fs->fs_magic == bswap32(FS_UFS1_MAGIC)) {
893 sbsize = bswap32(fs->fs_sbsize);
894 fstype = UFS1;
895 needswap = 1;
896 #endif
897 } else if (fs->fs_magic == FS_UFS2_MAGIC) {
898 sbsize = fs->fs_sbsize;
899 fstype = UFS2;
900 #ifdef FFS_EI
901 needswap = 0;
902 } else if (fs->fs_magic == bswap32(FS_UFS2_MAGIC)) {
903 sbsize = bswap32(fs->fs_sbsize);
904 fstype = UFS2;
905 needswap = 1;
906 #endif
907 } else
908 continue;
909
910
911 /* fs->fs_sblockloc isn't defined for old filesystems */
912 if (fstype == UFS1 && !(fs->fs_old_flags & FS_FLAGS_UPDATED)) {
913 if (sblockloc == SBLOCK_UFS2)
914 /*
915 * This is likely to be the first alternate
916 * in a filesystem with 64k blocks.
917 * Don't use it.
918 */
919 continue;
920 fsblockloc = sblockloc;
921 } else {
922 fsblockloc = fs->fs_sblockloc;
923 #ifdef FFS_EI
924 if (needswap)
925 fsblockloc = bswap64(fsblockloc);
926 #endif
927 }
928
929 /* Check we haven't found an alternate superblock */
930 if (fsblockloc != sblockloc)
931 continue;
932
933 /* Validate size of superblock */
934 if (sbsize > MAXBSIZE || sbsize < sizeof(struct fs))
935 continue;
936
937 /* Ok seems to be a good superblock */
938 break;
939 }
940
941 fs = malloc((u_long)sbsize, M_UFSMNT, M_WAITOK);
942 memcpy(fs, bp->b_data, sbsize);
943 ump->um_fs = fs;
944
945 #ifdef FFS_EI
946 if (needswap) {
947 ffs_sb_swap((struct fs*)bp->b_data, fs);
948 fs->fs_flags |= FS_SWAPPED;
949 } else
950 #endif
951 fs->fs_flags &= ~FS_SWAPPED;
952
953 #ifdef WAPBL
954 if ((mp->mnt_wapbl_replay == 0) && (fs->fs_flags & FS_DOWAPBL)) {
955 error = ffs_wapbl_replay_start(mp, fs, devvp);
956 if (error && (mp->mnt_flag & MNT_FORCE) == 0)
957 goto out;
958 if (!error) {
959 if (!ronly) {
960 /* XXX fsmnt may be stale. */
961 printf("%s: replaying log to disk\n",
962 fs->fs_fsmnt);
963 error = wapbl_replay_write(mp->mnt_wapbl_replay,
964 devvp);
965 if (error)
966 goto out;
967 wapbl_replay_stop(mp->mnt_wapbl_replay);
968 fs->fs_clean = FS_WASCLEAN;
969 } else {
970 /* XXX fsmnt may be stale */
971 printf("%s: replaying log to memory\n",
972 fs->fs_fsmnt);
973 }
974
975 /* Force a re-read of the superblock */
976 brelse(bp, BC_INVAL);
977 bp = NULL;
978 free(fs, M_UFSMNT);
979 fs = NULL;
980 goto sbagain;
981 }
982 }
983 #else /* !WAPBL */
984 if ((fs->fs_flags & FS_DOWAPBL) && (mp->mnt_flag & MNT_FORCE) == 0) {
985 error = EPERM;
986 goto out;
987 }
988 #endif /* !WAPBL */
989
990 ffs_oldfscompat_read(fs, ump, sblockloc);
991 ump->um_maxfilesize = fs->fs_maxfilesize;
992
993 if (fs->fs_flags & ~(FS_KNOWN_FLAGS | FS_INTERNAL)) {
994 uprintf("%s: unknown ufs flags: 0x%08"PRIx32"%s\n",
995 mp->mnt_stat.f_mntonname, fs->fs_flags,
996 (mp->mnt_flag & MNT_FORCE) ? "" : ", not mounting");
997 if ((mp->mnt_flag & MNT_FORCE) == 0) {
998 error = EINVAL;
999 goto out;
1000 }
1001 }
1002
1003 if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) {
1004 fs->fs_pendingblocks = 0;
1005 fs->fs_pendinginodes = 0;
1006 }
1007
1008 ump->um_fstype = fstype;
1009 if (fs->fs_sbsize < SBLOCKSIZE)
1010 brelse(bp, BC_INVAL);
1011 else
1012 brelse(bp, 0);
1013 bp = NULL;
1014
1015 /* First check to see if this is tagged as an Apple UFS filesystem
1016 * in the disklabel
1017 */
1018 if ((VOP_IOCTL(devvp, DIOCGPART, &dpart, FREAD, cred) == 0) &&
1019 (dpart.part->p_fstype == FS_APPLEUFS)) {
1020 ump->um_flags |= UFS_ISAPPLEUFS;
1021 }
1022 #ifdef APPLE_UFS
1023 else {
1024 /* Manually look for an apple ufs label, and if a valid one
1025 * is found, then treat it like an Apple UFS filesystem anyway
1026 */
1027 error = bread(devvp, (daddr_t)(APPLEUFS_LABEL_OFFSET / DEV_BSIZE),
1028 APPLEUFS_LABEL_SIZE, cred, 0, &bp);
1029 if (error)
1030 goto out;
1031 error = ffs_appleufs_validate(fs->fs_fsmnt,
1032 (struct appleufslabel *)bp->b_data, NULL);
1033 if (error == 0) {
1034 ump->um_flags |= UFS_ISAPPLEUFS;
1035 }
1036 brelse(bp, 0);
1037 bp = NULL;
1038 }
1039 #else
1040 if (ump->um_flags & UFS_ISAPPLEUFS) {
1041 error = EINVAL;
1042 goto out;
1043 }
1044 #endif
1045
1046 #if 0
1047 /*
1048 * XXX This code changes the behaviour of mounting dirty filesystems, to
1049 * XXX require "mount -f ..." to mount them. This doesn't match what
1050 * XXX mount(8) describes and is disabled for now.
1051 */
1052 /*
1053 * If the file system is not clean, don't allow it to be mounted
1054 * unless MNT_FORCE is specified. (Note: MNT_FORCE is always set
1055 * for the root file system.)
1056 */
1057 if (fs->fs_flags & FS_DOWAPBL) {
1058 /*
1059 * wapbl normally expects to be FS_WASCLEAN when the FS_DOWAPBL
1060 * bit is set, although there's a window in unmount where it
1061 * could be FS_ISCLEAN
1062 */
1063 if ((mp->mnt_flag & MNT_FORCE) == 0 &&
1064 (fs->fs_clean & (FS_WASCLEAN | FS_ISCLEAN)) == 0) {
1065 error = EPERM;
1066 goto out;
1067 }
1068 } else
1069 if ((fs->fs_clean & FS_ISCLEAN) == 0 &&
1070 (mp->mnt_flag & MNT_FORCE) == 0) {
1071 error = EPERM;
1072 goto out;
1073 }
1074 #endif
1075
1076 /*
1077 * verify that we can access the last block in the fs
1078 * if we're mounting read/write.
1079 */
1080
1081 if (!ronly) {
1082 error = bread(devvp, fsbtodb(fs, fs->fs_size - 1), fs->fs_fsize,
1083 cred, 0, &bp);
1084 if (bp->b_bcount != fs->fs_fsize)
1085 error = EINVAL;
1086 if (error) {
1087 bset = BC_INVAL;
1088 goto out;
1089 }
1090 brelse(bp, BC_INVAL);
1091 bp = NULL;
1092 }
1093
1094 fs->fs_ronly = ronly;
1095 /* Don't bump fs_clean if we're replaying journal */
1096 if (!((fs->fs_flags & FS_DOWAPBL) && (fs->fs_clean & FS_WASCLEAN)))
1097 if (ronly == 0) {
1098 fs->fs_clean <<= 1;
1099 fs->fs_fmod = 1;
1100 }
1101 bsize = fs->fs_cssize;
1102 blks = howmany(bsize, fs->fs_fsize);
1103 if (fs->fs_contigsumsize > 0)
1104 bsize += fs->fs_ncg * sizeof(int32_t);
1105 bsize += fs->fs_ncg * sizeof(*fs->fs_contigdirs);
1106 space = malloc((u_long)bsize, M_UFSMNT, M_WAITOK);
1107 fs->fs_csp = space;
1108 for (i = 0; i < blks; i += fs->fs_frag) {
1109 bsize = fs->fs_bsize;
1110 if (i + fs->fs_frag > blks)
1111 bsize = (blks - i) * fs->fs_fsize;
1112 error = bread(devvp, fsbtodb(fs, fs->fs_csaddr + i), bsize,
1113 cred, 0, &bp);
1114 if (error) {
1115 free(fs->fs_csp, M_UFSMNT);
1116 goto out;
1117 }
1118 #ifdef FFS_EI
1119 if (needswap)
1120 ffs_csum_swap((struct csum *)bp->b_data,
1121 (struct csum *)space, bsize);
1122 else
1123 #endif
1124 memcpy(space, bp->b_data, (u_int)bsize);
1125
1126 space = (char *)space + bsize;
1127 brelse(bp, 0);
1128 bp = NULL;
1129 }
1130 if (fs->fs_contigsumsize > 0) {
1131 fs->fs_maxcluster = lp = space;
1132 for (i = 0; i < fs->fs_ncg; i++)
1133 *lp++ = fs->fs_contigsumsize;
1134 space = lp;
1135 }
1136 bsize = fs->fs_ncg * sizeof(*fs->fs_contigdirs);
1137 fs->fs_contigdirs = space;
1138 space = (char *)space + bsize;
1139 memset(fs->fs_contigdirs, 0, bsize);
1140 /* Compatibility for old filesystems - XXX */
1141 if (fs->fs_avgfilesize <= 0)
1142 fs->fs_avgfilesize = AVFILESIZ;
1143 if (fs->fs_avgfpdir <= 0)
1144 fs->fs_avgfpdir = AFPDIR;
1145 fs->fs_active = NULL;
1146 mp->mnt_data = ump;
1147 mp->mnt_stat.f_fsidx.__fsid_val[0] = (long)dev;
1148 mp->mnt_stat.f_fsidx.__fsid_val[1] = makefstype(MOUNT_FFS);
1149 mp->mnt_stat.f_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0];
1150 mp->mnt_stat.f_namemax = FFS_MAXNAMLEN;
1151 if (UFS_MPISAPPLEUFS(ump)) {
1152 /* NeXT used to keep short symlinks in the inode even
1153 * when using FS_42INODEFMT. In that case fs->fs_maxsymlinklen
1154 * is probably -1, but we still need to be able to identify
1155 * short symlinks.
1156 */
1157 ump->um_maxsymlinklen = APPLEUFS_MAXSYMLINKLEN;
1158 ump->um_dirblksiz = APPLEUFS_DIRBLKSIZ;
1159 mp->mnt_iflag |= IMNT_DTYPE;
1160 } else {
1161 ump->um_maxsymlinklen = fs->fs_maxsymlinklen;
1162 ump->um_dirblksiz = DIRBLKSIZ;
1163 if (ump->um_maxsymlinklen > 0)
1164 mp->mnt_iflag |= IMNT_DTYPE;
1165 else
1166 mp->mnt_iflag &= ~IMNT_DTYPE;
1167 }
1168 mp->mnt_fs_bshift = fs->fs_bshift;
1169 mp->mnt_dev_bshift = DEV_BSHIFT; /* XXX */
1170 mp->mnt_flag |= MNT_LOCAL;
1171 mp->mnt_iflag |= IMNT_MPSAFE;
1172 #ifdef XIP
1173 void *physseg = 0;
1174 if (mp->mnt_flag & MNT_XIP) {
1175 if ((mp->mnt_flag & MNT_RDONLY) == 0)
1176 printf("XIP needs read-only mount\n");
1177 else {
1178 if ((VOP_IOCTL(devvp, DIOCGPHYSADDR, &physseg, FREAD,
1179 cred) == 0) &&
1180 physseg != NULL) {
1181 mp->mnt_iflag |= IMNT_XIP;
1182 devvp->v_physseg = physseg;
1183 } else
1184 printf("device doesn't support DIOCGPHYSADDR\n");
1185 }
1186 }
1187 #endif
1188 #ifdef FFS_EI
1189 if (needswap)
1190 ump->um_flags |= UFS_NEEDSWAP;
1191 #endif
1192 ump->um_mountp = mp;
1193 ump->um_dev = dev;
1194 ump->um_devvp = devvp;
1195 ump->um_nindir = fs->fs_nindir;
1196 ump->um_lognindir = ffs(fs->fs_nindir) - 1;
1197 ump->um_bptrtodb = fs->fs_fshift - DEV_BSHIFT;
1198 ump->um_seqinc = fs->fs_frag;
1199 for (i = 0; i < MAXQUOTAS; i++)
1200 ump->um_quotas[i] = NULLVP;
1201 devvp->v_specmountpoint = mp;
1202 if (ronly == 0 && fs->fs_snapinum[0] != 0)
1203 ffs_snapshot_mount(mp);
1204
1205 #ifdef WAPBL
1206 if (!ronly) {
1207 KDASSERT(fs->fs_ronly == 0);
1208 /*
1209 * ffs_wapbl_start() needs mp->mnt_stat initialised if it
1210 * needs to create a new log file in-filesystem.
1211 */
1212 ffs_statvfs(mp, &mp->mnt_stat);
1213
1214 error = ffs_wapbl_start(mp);
1215 if (error) {
1216 free(fs->fs_csp, M_UFSMNT);
1217 goto out;
1218 }
1219 }
1220 #endif /* WAPBL */
1221 #ifdef UFS_EXTATTR
1222 /*
1223 * Initialize file-backed extended attributes on UFS1 file
1224 * systems.
1225 */
1226 if (ump->um_fstype == UFS1) {
1227 ufs_extattr_uepm_init(&ump->um_extattr);
1228 #ifdef UFS_EXTATTR_AUTOSTART
1229 /*
1230 * XXX Just ignore errors. Not clear that we should
1231 * XXX fail the mount in this case.
1232 */
1233 (void) ufs_extattr_autostart(mp, l);
1234 #endif
1235 }
1236 #endif /* UFS_EXTATTR */
1237 return (0);
1238 out:
1239 #ifdef WAPBL
1240 if (mp->mnt_wapbl_replay) {
1241 wapbl_replay_stop(mp->mnt_wapbl_replay);
1242 wapbl_replay_free(mp->mnt_wapbl_replay);
1243 mp->mnt_wapbl_replay = 0;
1244 }
1245 #endif
1246
1247 fstrans_unmount(mp);
1248 if (fs)
1249 free(fs, M_UFSMNT);
1250 devvp->v_specmountpoint = NULL;
1251 if (bp)
1252 brelse(bp, bset);
1253 if (ump) {
1254 if (ump->um_oldfscompat)
1255 free(ump->um_oldfscompat, M_UFSMNT);
1256 mutex_destroy(&ump->um_lock);
1257 free(ump, M_UFSMNT);
1258 mp->mnt_data = NULL;
1259 }
1260 return (error);
1261 }
1262
1263 /*
1264 * Sanity checks for loading old filesystem superblocks.
1265 * See ffs_oldfscompat_write below for unwound actions.
1266 *
1267 * XXX - Parts get retired eventually.
1268 * Unfortunately new bits get added.
1269 */
1270 static void
1271 ffs_oldfscompat_read(struct fs *fs, struct ufsmount *ump, daddr_t sblockloc)
1272 {
1273 off_t maxfilesize;
1274 int32_t *extrasave;
1275
1276 if ((fs->fs_magic != FS_UFS1_MAGIC) ||
1277 (fs->fs_old_flags & FS_FLAGS_UPDATED))
1278 return;
1279
1280 if (!ump->um_oldfscompat)
1281 ump->um_oldfscompat = malloc(512 + 3*sizeof(int32_t),
1282 M_UFSMNT, M_WAITOK);
1283
1284 memcpy(ump->um_oldfscompat, &fs->fs_old_postbl_start, 512);
1285 extrasave = ump->um_oldfscompat;
1286 extrasave += 512/sizeof(int32_t);
1287 extrasave[0] = fs->fs_old_npsect;
1288 extrasave[1] = fs->fs_old_interleave;
1289 extrasave[2] = fs->fs_old_trackskew;
1290
1291 /* These fields will be overwritten by their
1292 * original values in fs_oldfscompat_write, so it is harmless
1293 * to modify them here.
1294 */
1295 fs->fs_cstotal.cs_ndir = fs->fs_old_cstotal.cs_ndir;
1296 fs->fs_cstotal.cs_nbfree = fs->fs_old_cstotal.cs_nbfree;
1297 fs->fs_cstotal.cs_nifree = fs->fs_old_cstotal.cs_nifree;
1298 fs->fs_cstotal.cs_nffree = fs->fs_old_cstotal.cs_nffree;
1299
1300 fs->fs_maxbsize = fs->fs_bsize;
1301 fs->fs_time = fs->fs_old_time;
1302 fs->fs_size = fs->fs_old_size;
1303 fs->fs_dsize = fs->fs_old_dsize;
1304 fs->fs_csaddr = fs->fs_old_csaddr;
1305 fs->fs_sblockloc = sblockloc;
1306
1307 fs->fs_flags = fs->fs_old_flags | (fs->fs_flags & FS_INTERNAL);
1308
1309 if (fs->fs_old_postblformat == FS_42POSTBLFMT) {
1310 fs->fs_old_nrpos = 8;
1311 fs->fs_old_npsect = fs->fs_old_nsect;
1312 fs->fs_old_interleave = 1;
1313 fs->fs_old_trackskew = 0;
1314 }
1315
1316 if (fs->fs_old_inodefmt < FS_44INODEFMT) {
1317 fs->fs_maxfilesize = (u_quad_t) 1LL << 39;
1318 fs->fs_qbmask = ~fs->fs_bmask;
1319 fs->fs_qfmask = ~fs->fs_fmask;
1320 }
1321
1322 maxfilesize = (u_int64_t)0x80000000 * fs->fs_bsize - 1;
1323 if (fs->fs_maxfilesize > maxfilesize)
1324 fs->fs_maxfilesize = maxfilesize;
1325
1326 /* Compatibility for old filesystems */
1327 if (fs->fs_avgfilesize <= 0)
1328 fs->fs_avgfilesize = AVFILESIZ;
1329 if (fs->fs_avgfpdir <= 0)
1330 fs->fs_avgfpdir = AFPDIR;
1331
1332 #if 0
1333 if (bigcgs) {
1334 fs->fs_save_cgsize = fs->fs_cgsize;
1335 fs->fs_cgsize = fs->fs_bsize;
1336 }
1337 #endif
1338 }
1339
1340 /*
1341 * Unwinding superblock updates for old filesystems.
1342 * See ffs_oldfscompat_read above for details.
1343 *
1344 * XXX - Parts get retired eventually.
1345 * Unfortunately new bits get added.
1346 */
1347 static void
1348 ffs_oldfscompat_write(struct fs *fs, struct ufsmount *ump)
1349 {
1350 int32_t *extrasave;
1351
1352 if ((fs->fs_magic != FS_UFS1_MAGIC) ||
1353 (fs->fs_old_flags & FS_FLAGS_UPDATED))
1354 return;
1355
1356 fs->fs_old_time = fs->fs_time;
1357 fs->fs_old_cstotal.cs_ndir = fs->fs_cstotal.cs_ndir;
1358 fs->fs_old_cstotal.cs_nbfree = fs->fs_cstotal.cs_nbfree;
1359 fs->fs_old_cstotal.cs_nifree = fs->fs_cstotal.cs_nifree;
1360 fs->fs_old_cstotal.cs_nffree = fs->fs_cstotal.cs_nffree;
1361 fs->fs_old_flags = fs->fs_flags;
1362
1363 #if 0
1364 if (bigcgs) {
1365 fs->fs_cgsize = fs->fs_save_cgsize;
1366 }
1367 #endif
1368
1369 memcpy(&fs->fs_old_postbl_start, ump->um_oldfscompat, 512);
1370 extrasave = ump->um_oldfscompat;
1371 extrasave += 512/sizeof(int32_t);
1372 fs->fs_old_npsect = extrasave[0];
1373 fs->fs_old_interleave = extrasave[1];
1374 fs->fs_old_trackskew = extrasave[2];
1375
1376 }
1377
1378 /*
1379 * unmount vfs operation
1380 */
1381 int
1382 ffs_unmount(struct mount *mp, int mntflags)
1383 {
1384 struct lwp *l = curlwp;
1385 struct ufsmount *ump = VFSTOUFS(mp);
1386 struct fs *fs = ump->um_fs;
1387 int error, flags;
1388 #ifdef WAPBL
1389 extern int doforce;
1390 #endif
1391
1392 flags = 0;
1393 if (mntflags & MNT_FORCE)
1394 flags |= FORCECLOSE;
1395 if ((error = ffs_flushfiles(mp, flags, l)) != 0)
1396 return (error);
1397 error = UFS_WAPBL_BEGIN(mp);
1398 if (error == 0)
1399 if (fs->fs_ronly == 0 &&
1400 ffs_cgupdate(ump, MNT_WAIT) == 0 &&
1401 fs->fs_clean & FS_WASCLEAN) {
1402 fs->fs_clean = FS_ISCLEAN;
1403 fs->fs_fmod = 0;
1404 (void) ffs_sbupdate(ump, MNT_WAIT);
1405 }
1406 if (error == 0)
1407 UFS_WAPBL_END(mp);
1408 #ifdef WAPBL
1409 KASSERT(!(mp->mnt_wapbl_replay && mp->mnt_wapbl));
1410 if (mp->mnt_wapbl_replay) {
1411 KDASSERT(fs->fs_ronly);
1412 wapbl_replay_stop(mp->mnt_wapbl_replay);
1413 wapbl_replay_free(mp->mnt_wapbl_replay);
1414 mp->mnt_wapbl_replay = 0;
1415 }
1416 error = ffs_wapbl_stop(mp, doforce && (mntflags & MNT_FORCE));
1417 if (error) {
1418 return error;
1419 }
1420 #endif /* WAPBL */
1421 #ifdef UFS_EXTATTR
1422 if (ump->um_fstype == UFS1) {
1423 ufs_extattr_stop(mp, l);
1424 ufs_extattr_uepm_destroy(&ump->um_extattr);
1425 }
1426 #endif /* UFS_EXTATTR */
1427
1428 if (ump->um_devvp->v_type != VBAD)
1429 ump->um_devvp->v_specmountpoint = NULL;
1430 vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY);
1431 (void)VOP_CLOSE(ump->um_devvp, fs->fs_ronly ? FREAD : FREAD | FWRITE,
1432 NOCRED);
1433 vput(ump->um_devvp);
1434 free(fs->fs_csp, M_UFSMNT);
1435 free(fs, M_UFSMNT);
1436 if (ump->um_oldfscompat != NULL)
1437 free(ump->um_oldfscompat, M_UFSMNT);
1438 mutex_destroy(&ump->um_lock);
1439 ffs_snapshot_fini(ump);
1440 free(ump, M_UFSMNT);
1441 mp->mnt_data = NULL;
1442 mp->mnt_flag &= ~MNT_LOCAL;
1443 fstrans_unmount(mp);
1444 return (0);
1445 }
1446
1447 /*
1448 * Flush out all the files in a filesystem.
1449 */
1450 int
1451 ffs_flushfiles(struct mount *mp, int flags, struct lwp *l)
1452 {
1453 extern int doforce;
1454 struct ufsmount *ump;
1455 int error;
1456
1457 if (!doforce)
1458 flags &= ~FORCECLOSE;
1459 ump = VFSTOUFS(mp);
1460 #ifdef QUOTA
1461 if (mp->mnt_flag & MNT_QUOTA) {
1462 int i;
1463 if ((error = vflush(mp, NULLVP, SKIPSYSTEM | flags)) != 0)
1464 return (error);
1465 for (i = 0; i < MAXQUOTAS; i++) {
1466 if (ump->um_quotas[i] == NULLVP)
1467 continue;
1468 quotaoff(l, mp, i);
1469 }
1470 /*
1471 * Here we fall through to vflush again to ensure
1472 * that we have gotten rid of all the system vnodes.
1473 */
1474 }
1475 #endif
1476 if ((error = vflush(mp, 0, SKIPSYSTEM | flags)) != 0)
1477 return (error);
1478 ffs_snapshot_unmount(mp);
1479 /*
1480 * Flush all the files.
1481 */
1482 error = vflush(mp, NULLVP, flags);
1483 if (error)
1484 return (error);
1485 /*
1486 * Flush filesystem metadata.
1487 */
1488 vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY);
1489 error = VOP_FSYNC(ump->um_devvp, l->l_cred, FSYNC_WAIT, 0, 0);
1490 VOP_UNLOCK(ump->um_devvp, 0);
1491 if (flags & FORCECLOSE) /* XXXDBJ */
1492 error = 0;
1493
1494 #ifdef WAPBL
1495 if (error)
1496 return error;
1497 if (mp->mnt_wapbl) {
1498 error = wapbl_flush(mp->mnt_wapbl, 1);
1499 if (flags & FORCECLOSE)
1500 error = 0;
1501 }
1502 #endif
1503
1504 return (error);
1505 }
1506
1507 /*
1508 * Get file system statistics.
1509 */
1510 int
1511 ffs_statvfs(struct mount *mp, struct statvfs *sbp)
1512 {
1513 struct ufsmount *ump;
1514 struct fs *fs;
1515
1516 ump = VFSTOUFS(mp);
1517 fs = ump->um_fs;
1518 mutex_enter(&ump->um_lock);
1519 sbp->f_bsize = fs->fs_bsize;
1520 sbp->f_frsize = fs->fs_fsize;
1521 sbp->f_iosize = fs->fs_bsize;
1522 sbp->f_blocks = fs->fs_dsize;
1523 sbp->f_bfree = blkstofrags(fs, fs->fs_cstotal.cs_nbfree) +
1524 fs->fs_cstotal.cs_nffree + dbtofsb(fs, fs->fs_pendingblocks);
1525 sbp->f_bresvd = ((u_int64_t) fs->fs_dsize * (u_int64_t)
1526 fs->fs_minfree) / (u_int64_t) 100;
1527 if (sbp->f_bfree > sbp->f_bresvd)
1528 sbp->f_bavail = sbp->f_bfree - sbp->f_bresvd;
1529 else
1530 sbp->f_bavail = 0;
1531 sbp->f_files = fs->fs_ncg * fs->fs_ipg - ROOTINO;
1532 sbp->f_ffree = fs->fs_cstotal.cs_nifree + fs->fs_pendinginodes;
1533 sbp->f_favail = sbp->f_ffree;
1534 sbp->f_fresvd = 0;
1535 mutex_exit(&ump->um_lock);
1536 copy_statvfs_info(sbp, mp);
1537
1538 return (0);
1539 }
1540
1541 /*
1542 * Go through the disk queues to initiate sandbagged IO;
1543 * go through the inodes to write those that have been modified;
1544 * initiate the writing of the super block if it has been modified.
1545 *
1546 * Note: we are always called with the filesystem marked `MPBUSY'.
1547 */
1548 int
1549 ffs_sync(struct mount *mp, int waitfor, kauth_cred_t cred)
1550 {
1551 struct vnode *vp, *mvp, *nvp;
1552 struct inode *ip;
1553 struct ufsmount *ump = VFSTOUFS(mp);
1554 struct fs *fs;
1555 int lk_flags, error, allerror = 0;
1556 bool is_suspending;
1557
1558 fs = ump->um_fs;
1559 if (fs->fs_fmod != 0 && fs->fs_ronly != 0) { /* XXX */
1560 printf("fs = %s\n", fs->fs_fsmnt);
1561 panic("update: rofs mod");
1562 }
1563
1564 /* Allocate a marker vnode. */
1565 if ((mvp = vnalloc(mp)) == NULL)
1566 return (ENOMEM);
1567
1568 fstrans_start(mp, FSTRANS_SHARED);
1569 is_suspending = (fstrans_getstate(mp) == FSTRANS_SUSPENDING);
1570 /*
1571 * We can't lock vnodes while the file system is suspending because
1572 * threads waiting on fstrans may have locked vnodes.
1573 */
1574 if (is_suspending)
1575 lk_flags = LK_INTERLOCK;
1576 else
1577 lk_flags = LK_EXCLUSIVE | LK_NOWAIT | LK_INTERLOCK;
1578 /*
1579 * Write back each (modified) inode.
1580 */
1581 mutex_enter(&mntvnode_lock);
1582 loop:
1583 /*
1584 * NOTE: not using the TAILQ_FOREACH here since in this loop vgone()
1585 * and vclean() can be called indirectly
1586 */
1587 for (vp = TAILQ_FIRST(&mp->mnt_vnodelist); vp; vp = nvp) {
1588 nvp = TAILQ_NEXT(vp, v_mntvnodes);
1589 /*
1590 * If the vnode that we are about to sync is no longer
1591 * associated with this mount point, start over.
1592 */
1593 if (vp->v_mount != mp)
1594 goto loop;
1595 /*
1596 * Don't interfere with concurrent scans of this FS.
1597 */
1598 if (vismarker(vp))
1599 continue;
1600 mutex_enter(&vp->v_interlock);
1601 ip = VTOI(vp);
1602
1603 /*
1604 * Skip the vnode/inode if inaccessible.
1605 */
1606 if (ip == NULL || (vp->v_iflag & (VI_XLOCK | VI_CLEAN)) != 0 ||
1607 vp->v_type == VNON) {
1608 mutex_exit(&vp->v_interlock);
1609 continue;
1610 }
1611
1612 /*
1613 * We deliberately update inode times here. This will
1614 * prevent a massive queue of updates accumulating, only
1615 * to be handled by a call to unmount.
1616 *
1617 * XXX It would be better to have the syncer trickle these
1618 * out. Adjustment needed to allow registering vnodes for
1619 * sync when the vnode is clean, but the inode dirty. Or
1620 * have ufs itself trickle out inode updates.
1621 *
1622 * If doing a lazy sync, we don't care about metadata or
1623 * data updates, because they are handled by each vnode's
1624 * synclist entry. In this case we are only interested in
1625 * writing back modified inodes.
1626 */
1627 if ((ip->i_flag & (IN_ACCESS | IN_CHANGE | IN_UPDATE |
1628 IN_MODIFY | IN_MODIFIED | IN_ACCESSED)) == 0 &&
1629 (waitfor == MNT_LAZY || (LIST_EMPTY(&vp->v_dirtyblkhd) &&
1630 UVM_OBJ_IS_CLEAN(&vp->v_uobj)))) {
1631 mutex_exit(&vp->v_interlock);
1632 continue;
1633 }
1634 if (vp->v_type == VBLK && is_suspending) {
1635 mutex_exit(&vp->v_interlock);
1636 continue;
1637 }
1638 vmark(mvp, vp);
1639 mutex_exit(&mntvnode_lock);
1640 error = vget(vp, lk_flags);
1641 if (error) {
1642 mutex_enter(&mntvnode_lock);
1643 nvp = vunmark(mvp);
1644 if (error == ENOENT) {
1645 goto loop;
1646 }
1647 continue;
1648 }
1649 if (waitfor == MNT_LAZY) {
1650 error = UFS_WAPBL_BEGIN(vp->v_mount);
1651 if (!error) {
1652 error = ffs_update(vp, NULL, NULL,
1653 UPDATE_CLOSE);
1654 UFS_WAPBL_END(vp->v_mount);
1655 }
1656 } else {
1657 error = VOP_FSYNC(vp, cred, FSYNC_NOLOG |
1658 (waitfor == MNT_WAIT ? FSYNC_WAIT : 0), 0, 0);
1659 }
1660 if (error)
1661 allerror = error;
1662 if (is_suspending)
1663 vrele(vp);
1664 else
1665 vput(vp);
1666 mutex_enter(&mntvnode_lock);
1667 nvp = vunmark(mvp);
1668 }
1669 mutex_exit(&mntvnode_lock);
1670 /*
1671 * Force stale file system control information to be flushed.
1672 */
1673 if (waitfor != MNT_LAZY && (ump->um_devvp->v_numoutput > 0 ||
1674 !LIST_EMPTY(&ump->um_devvp->v_dirtyblkhd))) {
1675 vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY);
1676 if ((error = VOP_FSYNC(ump->um_devvp, cred,
1677 (waitfor == MNT_WAIT ? FSYNC_WAIT : 0) | FSYNC_NOLOG,
1678 0, 0)) != 0)
1679 allerror = error;
1680 VOP_UNLOCK(ump->um_devvp, 0);
1681 if (allerror == 0 && waitfor == MNT_WAIT && !mp->mnt_wapbl) {
1682 mutex_enter(&mntvnode_lock);
1683 goto loop;
1684 }
1685 }
1686 #ifdef QUOTA
1687 qsync(mp);
1688 #endif
1689 /*
1690 * Write back modified superblock.
1691 */
1692 if (fs->fs_fmod != 0) {
1693 fs->fs_fmod = 0;
1694 fs->fs_time = time_second;
1695 error = UFS_WAPBL_BEGIN(mp);
1696 if (error)
1697 allerror = error;
1698 else {
1699 if ((error = ffs_cgupdate(ump, waitfor)))
1700 allerror = error;
1701 UFS_WAPBL_END(mp);
1702 }
1703 }
1704
1705 #ifdef WAPBL
1706 if (mp->mnt_wapbl) {
1707 error = wapbl_flush(mp->mnt_wapbl, 0);
1708 if (error)
1709 allerror = error;
1710 }
1711 #endif
1712
1713 fstrans_done(mp);
1714 vnfree(mvp);
1715 return (allerror);
1716 }
1717
1718 /*
1719 * Look up a FFS dinode number to find its incore vnode, otherwise read it
1720 * in from disk. If it is in core, wait for the lock bit to clear, then
1721 * return the inode locked. Detection and handling of mount points must be
1722 * done by the calling routine.
1723 */
1724 int
1725 ffs_vget(struct mount *mp, ino_t ino, struct vnode **vpp)
1726 {
1727 struct fs *fs;
1728 struct inode *ip;
1729 struct ufsmount *ump;
1730 struct buf *bp;
1731 struct vnode *vp;
1732 dev_t dev;
1733 int error;
1734
1735 ump = VFSTOUFS(mp);
1736 dev = ump->um_dev;
1737
1738 retry:
1739 if ((*vpp = ufs_ihashget(dev, ino, LK_EXCLUSIVE)) != NULL)
1740 return (0);
1741
1742 /* Allocate a new vnode/inode. */
1743 if ((error = getnewvnode(VT_UFS, mp, ffs_vnodeop_p, &vp)) != 0) {
1744 *vpp = NULL;
1745 return (error);
1746 }
1747 ip = pool_cache_get(ffs_inode_cache, PR_WAITOK);
1748
1749 /*
1750 * If someone beat us to it, put back the freshly allocated
1751 * vnode/inode pair and retry.
1752 */
1753 mutex_enter(&ufs_hashlock);
1754 if (ufs_ihashget(dev, ino, 0) != NULL) {
1755 mutex_exit(&ufs_hashlock);
1756 ungetnewvnode(vp);
1757 pool_cache_put(ffs_inode_cache, ip);
1758 goto retry;
1759 }
1760
1761 vp->v_vflag |= VV_LOCKSWORK;
1762
1763 #ifdef XIP
1764 if ((vp->v_mount->mnt_iflag & IMNT_XIP) != 0) {
1765 vp->v_vflag |= VV_XIP;
1766 }
1767 #endif
1768
1769 /*
1770 * XXX MFS ends up here, too, to allocate an inode. Should we
1771 * XXX create another pool for MFS inodes?
1772 */
1773
1774 memset(ip, 0, sizeof(struct inode));
1775 vp->v_data = ip;
1776 ip->i_vnode = vp;
1777 ip->i_ump = ump;
1778 ip->i_fs = fs = ump->um_fs;
1779 ip->i_dev = dev;
1780 ip->i_number = ino;
1781 #ifdef QUOTA
1782 ufsquota_init(ip);
1783 #endif
1784
1785 /*
1786 * Initialize genfs node, we might proceed to destroy it in
1787 * error branches.
1788 */
1789 genfs_node_init(vp, &ffs_genfsops);
1790
1791 /*
1792 * Put it onto its hash chain and lock it so that other requests for
1793 * this inode will block if they arrive while we are sleeping waiting
1794 * for old data structures to be purged or for the contents of the
1795 * disk portion of this inode to be read.
1796 */
1797
1798 ufs_ihashins(ip);
1799 mutex_exit(&ufs_hashlock);
1800
1801 /* Read in the disk contents for the inode, copy into the inode. */
1802 error = bread(ump->um_devvp, fsbtodb(fs, ino_to_fsba(fs, ino)),
1803 (int)fs->fs_bsize, NOCRED, 0, &bp);
1804 if (error) {
1805
1806 /*
1807 * The inode does not contain anything useful, so it would
1808 * be misleading to leave it on its hash chain. With mode
1809 * still zero, it will be unlinked and returned to the free
1810 * list by vput().
1811 */
1812
1813 vput(vp);
1814 brelse(bp, 0);
1815 *vpp = NULL;
1816 return (error);
1817 }
1818 if (ip->i_ump->um_fstype == UFS1)
1819 ip->i_din.ffs1_din = pool_cache_get(ffs_dinode1_cache,
1820 PR_WAITOK);
1821 else
1822 ip->i_din.ffs2_din = pool_cache_get(ffs_dinode2_cache,
1823 PR_WAITOK);
1824 ffs_load_inode(bp, ip, fs, ino);
1825 brelse(bp, 0);
1826
1827 /*
1828 * Initialize the vnode from the inode, check for aliases.
1829 * Note that the underlying vnode may have changed.
1830 */
1831
1832 ufs_vinit(mp, ffs_specop_p, ffs_fifoop_p, &vp);
1833
1834 /*
1835 * Finish inode initialization now that aliasing has been resolved.
1836 */
1837
1838 ip->i_devvp = ump->um_devvp;
1839 vref(ip->i_devvp);
1840
1841 /*
1842 * Ensure that uid and gid are correct. This is a temporary
1843 * fix until fsck has been changed to do the update.
1844 */
1845
1846 if (fs->fs_old_inodefmt < FS_44INODEFMT) { /* XXX */
1847 ip->i_uid = ip->i_ffs1_ouid; /* XXX */
1848 ip->i_gid = ip->i_ffs1_ogid; /* XXX */
1849 } /* XXX */
1850 uvm_vnp_setsize(vp, ip->i_size);
1851 *vpp = vp;
1852 return (0);
1853 }
1854
1855 /*
1856 * File handle to vnode
1857 *
1858 * Have to be really careful about stale file handles:
1859 * - check that the inode number is valid
1860 * - call ffs_vget() to get the locked inode
1861 * - check for an unallocated inode (i_mode == 0)
1862 * - check that the given client host has export rights and return
1863 * those rights via. exflagsp and credanonp
1864 */
1865 int
1866 ffs_fhtovp(struct mount *mp, struct fid *fhp, struct vnode **vpp)
1867 {
1868 struct ufid ufh;
1869 struct fs *fs;
1870
1871 if (fhp->fid_len != sizeof(struct ufid))
1872 return EINVAL;
1873
1874 memcpy(&ufh, fhp, sizeof(ufh));
1875 fs = VFSTOUFS(mp)->um_fs;
1876 if (ufh.ufid_ino < ROOTINO ||
1877 ufh.ufid_ino >= fs->fs_ncg * fs->fs_ipg)
1878 return (ESTALE);
1879 return (ufs_fhtovp(mp, &ufh, vpp));
1880 }
1881
1882 /*
1883 * Vnode pointer to File handle
1884 */
1885 /* ARGSUSED */
1886 int
1887 ffs_vptofh(struct vnode *vp, struct fid *fhp, size_t *fh_size)
1888 {
1889 struct inode *ip;
1890 struct ufid ufh;
1891
1892 if (*fh_size < sizeof(struct ufid)) {
1893 *fh_size = sizeof(struct ufid);
1894 return E2BIG;
1895 }
1896 ip = VTOI(vp);
1897 *fh_size = sizeof(struct ufid);
1898 memset(&ufh, 0, sizeof(ufh));
1899 ufh.ufid_len = sizeof(struct ufid);
1900 ufh.ufid_ino = ip->i_number;
1901 ufh.ufid_gen = ip->i_gen;
1902 memcpy(fhp, &ufh, sizeof(ufh));
1903 return (0);
1904 }
1905
1906 void
1907 ffs_init(void)
1908 {
1909 if (ffs_initcount++ > 0)
1910 return;
1911
1912 ffs_inode_cache = pool_cache_init(sizeof(struct inode), 0, 0, 0,
1913 "ffsino", NULL, IPL_NONE, NULL, NULL, NULL);
1914 ffs_dinode1_cache = pool_cache_init(sizeof(struct ufs1_dinode), 0, 0, 0,
1915 "ffsdino1", NULL, IPL_NONE, NULL, NULL, NULL);
1916 ffs_dinode2_cache = pool_cache_init(sizeof(struct ufs2_dinode), 0, 0, 0,
1917 "ffsdino2", NULL, IPL_NONE, NULL, NULL, NULL);
1918 ufs_init();
1919 }
1920
1921 void
1922 ffs_reinit(void)
1923 {
1924
1925 ufs_reinit();
1926 }
1927
1928 void
1929 ffs_done(void)
1930 {
1931 if (--ffs_initcount > 0)
1932 return;
1933
1934 ufs_done();
1935 pool_cache_destroy(ffs_dinode2_cache);
1936 pool_cache_destroy(ffs_dinode1_cache);
1937 pool_cache_destroy(ffs_inode_cache);
1938 }
1939
1940 /*
1941 * Write a superblock and associated information back to disk.
1942 */
1943 int
1944 ffs_sbupdate(struct ufsmount *mp, int waitfor)
1945 {
1946 struct fs *fs = mp->um_fs;
1947 struct buf *bp;
1948 int error = 0;
1949 u_int32_t saveflag;
1950
1951 error = ffs_getblk(mp->um_devvp,
1952 fs->fs_sblockloc / DEV_BSIZE, FFS_NOBLK,
1953 fs->fs_sbsize, false, &bp);
1954 if (error)
1955 return error;
1956 saveflag = fs->fs_flags & FS_INTERNAL;
1957 fs->fs_flags &= ~FS_INTERNAL;
1958
1959 memcpy(bp->b_data, fs, fs->fs_sbsize);
1960
1961 ffs_oldfscompat_write((struct fs *)bp->b_data, mp);
1962 #ifdef FFS_EI
1963 if (mp->um_flags & UFS_NEEDSWAP)
1964 ffs_sb_swap((struct fs *)bp->b_data, (struct fs *)bp->b_data);
1965 #endif
1966 fs->fs_flags |= saveflag;
1967
1968 if (waitfor == MNT_WAIT)
1969 error = bwrite(bp);
1970 else
1971 bawrite(bp);
1972 return (error);
1973 }
1974
1975 int
1976 ffs_cgupdate(struct ufsmount *mp, int waitfor)
1977 {
1978 struct fs *fs = mp->um_fs;
1979 struct buf *bp;
1980 int blks;
1981 void *space;
1982 int i, size, error = 0, allerror = 0;
1983
1984 allerror = ffs_sbupdate(mp, waitfor);
1985 blks = howmany(fs->fs_cssize, fs->fs_fsize);
1986 space = fs->fs_csp;
1987 for (i = 0; i < blks; i += fs->fs_frag) {
1988 size = fs->fs_bsize;
1989 if (i + fs->fs_frag > blks)
1990 size = (blks - i) * fs->fs_fsize;
1991 error = ffs_getblk(mp->um_devvp, fsbtodb(fs, fs->fs_csaddr + i),
1992 FFS_NOBLK, size, false, &bp);
1993 if (error)
1994 break;
1995 #ifdef FFS_EI
1996 if (mp->um_flags & UFS_NEEDSWAP)
1997 ffs_csum_swap((struct csum*)space,
1998 (struct csum*)bp->b_data, size);
1999 else
2000 #endif
2001 memcpy(bp->b_data, space, (u_int)size);
2002 space = (char *)space + size;
2003 if (waitfor == MNT_WAIT)
2004 error = bwrite(bp);
2005 else
2006 bawrite(bp);
2007 }
2008 if (!allerror && error)
2009 allerror = error;
2010 return (allerror);
2011 }
2012
2013 int
2014 ffs_extattrctl(struct mount *mp, int cmd, struct vnode *vp,
2015 int attrnamespace, const char *attrname)
2016 {
2017 #ifdef UFS_EXTATTR
2018 /*
2019 * File-backed extended attributes are only supported on UFS1.
2020 * UFS2 has native extended attributes.
2021 */
2022 if (VFSTOUFS(mp)->um_fstype == UFS1)
2023 return (ufs_extattrctl(mp, cmd, vp, attrnamespace, attrname));
2024 #endif
2025 return (vfs_stdextattrctl(mp, cmd, vp, attrnamespace, attrname));
2026 }
2027
2028 int
2029 ffs_suspendctl(struct mount *mp, int cmd)
2030 {
2031 int error;
2032 struct lwp *l = curlwp;
2033
2034 switch (cmd) {
2035 case SUSPEND_SUSPEND:
2036 if ((error = fstrans_setstate(mp, FSTRANS_SUSPENDING)) != 0)
2037 return error;
2038 error = ffs_sync(mp, MNT_WAIT, l->l_proc->p_cred);
2039 if (error == 0)
2040 error = fstrans_setstate(mp, FSTRANS_SUSPENDED);
2041 #ifdef WAPBL
2042 if (error == 0 && mp->mnt_wapbl)
2043 error = wapbl_flush(mp->mnt_wapbl, 1);
2044 #endif
2045 if (error != 0) {
2046 (void) fstrans_setstate(mp, FSTRANS_NORMAL);
2047 return error;
2048 }
2049 return 0;
2050
2051 case SUSPEND_RESUME:
2052 return fstrans_setstate(mp, FSTRANS_NORMAL);
2053
2054 default:
2055 return EINVAL;
2056 }
2057 }
2058
2059 /*
2060 * Synch vnode for a mounted file system. This is called for foreign
2061 * vnodes, i.e. non-ffs.
2062 */
2063 static int
2064 ffs_vfs_fsync(vnode_t *vp, int flags)
2065 {
2066 int error, passes, skipmeta, i, pflags;
2067 buf_t *bp, *nbp;
2068 #ifdef WAPBL
2069 struct mount *mp;
2070 #endif
2071
2072 KASSERT(vp->v_type == VBLK);
2073 KASSERT(vp->v_specmountpoint != NULL);
2074
2075 /*
2076 * Flush all dirty data associated with the vnode.
2077 */
2078 pflags = PGO_ALLPAGES | PGO_CLEANIT;
2079 if ((flags & FSYNC_WAIT) != 0)
2080 pflags |= PGO_SYNCIO;
2081 mutex_enter(&vp->v_interlock);
2082 error = VOP_PUTPAGES(vp, 0, 0, pflags);
2083 if (error)
2084 return error;
2085
2086 #ifdef WAPBL
2087 mp = vp->v_specmountpoint;
2088 if (mp && mp->mnt_wapbl) {
2089 /*
2090 * Don't bother writing out metadata if the syncer is
2091 * making the request. We will let the sync vnode
2092 * write it out in a single burst through a call to
2093 * VFS_SYNC().
2094 */
2095 if ((flags & (FSYNC_DATAONLY | FSYNC_LAZY | FSYNC_NOLOG)) != 0)
2096 return 0;
2097
2098 /*
2099 * Don't flush the log if the vnode being flushed
2100 * contains no dirty buffers that could be in the log.
2101 */
2102 if (!LIST_EMPTY(&vp->v_dirtyblkhd)) {
2103 error = wapbl_flush(mp->mnt_wapbl, 0);
2104 if (error)
2105 return error;
2106 }
2107
2108 if ((flags & FSYNC_WAIT) != 0) {
2109 mutex_enter(&vp->v_interlock);
2110 while (vp->v_numoutput)
2111 cv_wait(&vp->v_cv, &vp->v_interlock);
2112 mutex_exit(&vp->v_interlock);
2113 }
2114
2115 return 0;
2116 }
2117 #endif /* WAPBL */
2118
2119 /*
2120 * Write out metadata for non-logging file systems. XXX This block
2121 * should be simplified now that softdep is gone.
2122 */
2123 passes = NIADDR + 1;
2124 skipmeta = 0;
2125 if (flags & FSYNC_WAIT)
2126 skipmeta = 1;
2127
2128 loop:
2129 mutex_enter(&bufcache_lock);
2130 LIST_FOREACH(bp, &vp->v_dirtyblkhd, b_vnbufs) {
2131 bp->b_cflags &= ~BC_SCANNED;
2132 }
2133 for (bp = LIST_FIRST(&vp->v_dirtyblkhd); bp; bp = nbp) {
2134 nbp = LIST_NEXT(bp, b_vnbufs);
2135 if (bp->b_cflags & (BC_BUSY | BC_SCANNED))
2136 continue;
2137 if ((bp->b_oflags & BO_DELWRI) == 0)
2138 panic("ffs_fsync: not dirty");
2139 if (skipmeta && bp->b_lblkno < 0)
2140 continue;
2141 bp->b_cflags |= BC_BUSY | BC_VFLUSH | BC_SCANNED;
2142 mutex_exit(&bufcache_lock);
2143 /*
2144 * On our final pass through, do all I/O synchronously
2145 * so that we can find out if our flush is failing
2146 * because of write errors.
2147 */
2148 if (passes > 0 || !(flags & FSYNC_WAIT))
2149 (void) bawrite(bp);
2150 else if ((error = bwrite(bp)) != 0)
2151 return (error);
2152 /*
2153 * Since we unlocked during the I/O, we need
2154 * to start from a known point.
2155 */
2156 mutex_enter(&bufcache_lock);
2157 nbp = LIST_FIRST(&vp->v_dirtyblkhd);
2158 }
2159 mutex_exit(&bufcache_lock);
2160 if (skipmeta) {
2161 skipmeta = 0;
2162 goto loop;
2163 }
2164
2165 if ((flags & FSYNC_WAIT) != 0) {
2166 mutex_enter(&vp->v_interlock);
2167 while (vp->v_numoutput) {
2168 cv_wait(&vp->v_cv, &vp->v_interlock);
2169 }
2170 mutex_exit(&vp->v_interlock);
2171
2172 if (!LIST_EMPTY(&vp->v_dirtyblkhd)) {
2173 /*
2174 * Block devices associated with filesystems may
2175 * have new I/O requests posted for them even if
2176 * the vnode is locked, so no amount of trying will
2177 * get them clean. Thus we give block devices a
2178 * good effort, then just give up. For all other file
2179 * types, go around and try again until it is clean.
2180 */
2181 if (passes > 0) {
2182 passes--;
2183 goto loop;
2184 }
2185 #ifdef DIAGNOSTIC
2186 if (vp->v_type != VBLK)
2187 vprint("ffs_fsync: dirty", vp);
2188 #endif
2189 }
2190 }
2191
2192 if (error == 0 && (flags & FSYNC_CACHE) != 0) {
2193 (void)VOP_IOCTL(vp, DIOCCACHESYNC, &i, FWRITE,
2194 kauth_cred_get());
2195 }
2196
2197 return error;
2198 }
2199