1 /* $NetBSD: ffs_vfsops.c,v 1.381 2023/06/15 09:15:54 hannken 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 1.381 2023/06/15 09:15:54 hannken 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/fstrans.h>
79 #include <sys/socket.h>
80 #include <sys/mount.h>
81 #include <sys/buf.h>
82 #include <sys/device.h>
83 #include <sys/disk.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/module.h>
96
97 #include <miscfs/genfs/genfs.h>
98 #include <miscfs/specfs/specdev.h>
99
100 #include <ufs/ufs/quota.h>
101 #include <ufs/ufs/ufsmount.h>
102 #include <ufs/ufs/inode.h>
103 #include <ufs/ufs/dir.h>
104 #include <ufs/ufs/ufs_extern.h>
105 #include <ufs/ufs/ufs_bswap.h>
106 #include <ufs/ufs/ufs_wapbl.h>
107
108 #include <ufs/ffs/fs.h>
109 #include <ufs/ffs/ffs_extern.h>
110
111 #ifdef WAPBL
112 MODULE(MODULE_CLASS_VFS, ffs, "ufs,wapbl");
113 #else
114 MODULE(MODULE_CLASS_VFS, ffs, "ufs");
115 #endif
116
117 static int ffs_vfs_fsync(vnode_t *, int);
118 static int ffs_superblock_validate(struct fs *);
119 static int ffs_is_appleufs(struct vnode *, struct fs *);
120
121 static int ffs_init_vnode(struct ufsmount *, struct vnode *, ino_t);
122 static void ffs_deinit_vnode(struct ufsmount *, struct vnode *);
123
124 static kauth_listener_t ffs_snapshot_listener;
125
126 /* how many times ffs_init() was called */
127 int ffs_initcount = 0;
128
129 #ifdef DEBUG_FFS_MOUNT
130 #define DPRINTF(_fmt, args...) printf("%s: " _fmt "\n", __func__, ##args)
131 #else
132 #define DPRINTF(_fmt, args...) do {} while (/*CONSTCOND*/0)
133 #endif
134
135 extern const struct vnodeopv_desc ffs_vnodeop_opv_desc;
136 extern const struct vnodeopv_desc ffs_specop_opv_desc;
137 extern const struct vnodeopv_desc ffs_fifoop_opv_desc;
138
139 const struct vnodeopv_desc * const ffs_vnodeopv_descs[] = {
140 &ffs_vnodeop_opv_desc,
141 &ffs_specop_opv_desc,
142 &ffs_fifoop_opv_desc,
143 NULL,
144 };
145
146 struct vfsops ffs_vfsops = {
147 .vfs_name = MOUNT_FFS,
148 .vfs_min_mount_data = sizeof (struct ufs_args),
149 .vfs_mount = ffs_mount,
150 .vfs_start = ufs_start,
151 .vfs_unmount = ffs_unmount,
152 .vfs_root = ufs_root,
153 .vfs_quotactl = ufs_quotactl,
154 .vfs_statvfs = ffs_statvfs,
155 .vfs_sync = ffs_sync,
156 .vfs_vget = ufs_vget,
157 .vfs_loadvnode = ffs_loadvnode,
158 .vfs_newvnode = ffs_newvnode,
159 .vfs_fhtovp = ffs_fhtovp,
160 .vfs_vptofh = ffs_vptofh,
161 .vfs_init = ffs_init,
162 .vfs_reinit = ffs_reinit,
163 .vfs_done = ffs_done,
164 .vfs_mountroot = ffs_mountroot,
165 .vfs_snapshot = ffs_snapshot,
166 .vfs_extattrctl = ffs_extattrctl,
167 .vfs_suspendctl = genfs_suspendctl,
168 .vfs_renamelock_enter = genfs_renamelock_enter,
169 .vfs_renamelock_exit = genfs_renamelock_exit,
170 .vfs_fsync = ffs_vfs_fsync,
171 .vfs_opv_descs = ffs_vnodeopv_descs
172 };
173
174 static const struct genfs_ops ffs_genfsops = {
175 .gop_size = ffs_gop_size,
176 .gop_alloc = ufs_gop_alloc,
177 .gop_write = genfs_gop_write,
178 .gop_markupdate = ufs_gop_markupdate,
179 .gop_putrange = genfs_gop_putrange,
180 };
181
182 static const struct ufs_ops ffs_ufsops = {
183 .uo_itimes = ffs_itimes,
184 .uo_update = ffs_update,
185 .uo_truncate = ffs_truncate,
186 .uo_balloc = ffs_balloc,
187 .uo_snapgone = ffs_snapgone,
188 .uo_bufrd = ffs_bufrd,
189 .uo_bufwr = ffs_bufwr,
190 };
191
192 static int
ffs_checkrange(struct mount * mp,ino_t ino)193 ffs_checkrange(struct mount *mp, ino_t ino)
194 {
195 struct fs *fs = VFSTOUFS(mp)->um_fs;
196
197 if (ino < UFS_ROOTINO || ino >= fs->fs_ncg * fs->fs_ipg) {
198 DPRINTF("out of range %" PRIu64 "\n", ino);
199 return ESTALE;
200 }
201
202 /*
203 * Need to check if inode is initialized because ffsv2 does
204 * lazy initialization and we can get here from nfs_fhtovp
205 */
206 if (fs->fs_magic != FS_UFS2_MAGIC)
207 return 0;
208
209 struct buf *bp;
210 int cg = ino_to_cg(fs, ino);
211 struct ufsmount *ump = VFSTOUFS(mp);
212
213 int error = bread(ump->um_devvp, FFS_FSBTODB(fs, cgtod(fs, cg)),
214 (int)fs->fs_cgsize, B_MODIFY, &bp);
215 if (error) {
216 DPRINTF("error %d reading cg %d ino %" PRIu64 "\n",
217 error, cg, ino);
218 return error;
219 }
220
221 const int needswap = UFS_FSNEEDSWAP(fs);
222
223 struct cg *cgp = (struct cg *)bp->b_data;
224 if (!cg_chkmagic(cgp, needswap)) {
225 brelse(bp, 0);
226 DPRINTF("bad cylinder group magic cg %d ino %" PRIu64 "\n",
227 cg, ino);
228 return ESTALE;
229 }
230
231 int32_t initediblk = ufs_rw32(cgp->cg_initediblk, needswap);
232 brelse(bp, 0);
233
234 if (cg * fs->fs_ipg + initediblk < ino) {
235 DPRINTF("cg=%d fs->fs_ipg=%d initediblk=%d ino=%" PRIu64 "\n",
236 cg, fs->fs_ipg, initediblk, ino);
237 return ESTALE;
238 }
239 return 0;
240 }
241
242 static int
ffs_snapshot_cb(kauth_cred_t cred,kauth_action_t action,void * cookie,void * arg0,void * arg1,void * arg2,void * arg3)243 ffs_snapshot_cb(kauth_cred_t cred, kauth_action_t action, void *cookie,
244 void *arg0, void *arg1, void *arg2, void *arg3)
245 {
246 vnode_t *vp = arg2;
247 int result = KAUTH_RESULT_DEFER;
248
249 if (action != KAUTH_SYSTEM_FS_SNAPSHOT)
250 return result;
251
252 if (VTOI(vp)->i_uid == kauth_cred_geteuid(cred))
253 result = KAUTH_RESULT_ALLOW;
254
255 return result;
256 }
257
258 SYSCTL_SETUP(ffs_sysctl_setup, "ffs sysctls")
259 {
260 #ifdef UFS_EXTATTR
261 extern int ufs_extattr_autocreate;
262 #endif
263 extern int ffs_log_changeopt;
264
265 sysctl_createv(clog, 0, NULL, NULL,
266 CTLFLAG_PERMANENT,
267 CTLTYPE_NODE, "ffs",
268 SYSCTL_DESCR("Berkeley Fast File System"),
269 NULL, 0, NULL, 0,
270 CTL_VFS, 1, CTL_EOL);
271 /*
272 * @@@ should we even bother with these first three?
273 */
274 sysctl_createv(clog, 0, NULL, NULL,
275 CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
276 CTLTYPE_INT, "doclusterread", NULL,
277 sysctl_notavail, 0, NULL, 0,
278 CTL_VFS, 1, FFS_CLUSTERREAD, CTL_EOL);
279 sysctl_createv(clog, 0, NULL, NULL,
280 CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
281 CTLTYPE_INT, "doclusterwrite", NULL,
282 sysctl_notavail, 0, NULL, 0,
283 CTL_VFS, 1, FFS_CLUSTERWRITE, CTL_EOL);
284 sysctl_createv(clog, 0, NULL, NULL,
285 CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
286 CTLTYPE_INT, "doreallocblks", NULL,
287 sysctl_notavail, 0, NULL, 0,
288 CTL_VFS, 1, FFS_REALLOCBLKS, CTL_EOL);
289 #if 0
290 sysctl_createv(clog, 0, NULL, NULL,
291 CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
292 CTLTYPE_INT, "doasyncfree",
293 SYSCTL_DESCR("Release dirty blocks asynchronously"),
294 NULL, 0, &doasyncfree, 0,
295 CTL_VFS, 1, FFS_ASYNCFREE, CTL_EOL);
296 #endif
297 sysctl_createv(clog, 0, NULL, NULL,
298 CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
299 CTLTYPE_INT, "log_changeopt",
300 SYSCTL_DESCR("Log changes in optimization strategy"),
301 NULL, 0, &ffs_log_changeopt, 0,
302 CTL_VFS, 1, FFS_LOG_CHANGEOPT, CTL_EOL);
303 #ifdef UFS_EXTATTR
304 sysctl_createv(clog, 0, NULL, NULL,
305 CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
306 CTLTYPE_INT, "extattr_autocreate",
307 SYSCTL_DESCR("Size of attribute for "
308 "backing file autocreation"),
309 NULL, 0, &ufs_extattr_autocreate, 0,
310 CTL_VFS, 1, FFS_EXTATTR_AUTOCREATE, CTL_EOL);
311
312 #endif /* UFS_EXTATTR */
313 }
314
315 static int
ffs_modcmd(modcmd_t cmd,void * arg)316 ffs_modcmd(modcmd_t cmd, void *arg)
317 {
318 int error;
319
320 #if 0
321 extern int doasyncfree;
322 #endif
323
324 switch (cmd) {
325 case MODULE_CMD_INIT:
326 error = vfs_attach(&ffs_vfsops);
327 if (error != 0)
328 break;
329
330 ffs_snapshot_listener = kauth_listen_scope(KAUTH_SCOPE_SYSTEM,
331 ffs_snapshot_cb, NULL);
332 if (ffs_snapshot_listener == NULL)
333 printf("ffs_modcmd: can't listen on system scope.\n");
334
335 break;
336 case MODULE_CMD_FINI:
337 error = vfs_detach(&ffs_vfsops);
338 if (error != 0)
339 break;
340 if (ffs_snapshot_listener != NULL)
341 kauth_unlisten_scope(ffs_snapshot_listener);
342 break;
343 default:
344 error = ENOTTY;
345 break;
346 }
347
348 return (error);
349 }
350
351 pool_cache_t ffs_inode_cache;
352 pool_cache_t ffs_dinode1_cache;
353 pool_cache_t ffs_dinode2_cache;
354
355 static void ffs_oldfscompat_read(struct fs *, struct ufsmount *, daddr_t);
356 static void ffs_oldfscompat_write(struct fs *, struct ufsmount *);
357
358 /*
359 * Called by main() when ffs is going to be mounted as root.
360 */
361
362 int
ffs_mountroot(void)363 ffs_mountroot(void)
364 {
365 struct fs *fs;
366 struct mount *mp;
367 struct lwp *l = curlwp; /* XXX */
368 struct ufsmount *ump;
369 int error;
370
371 if (device_class(root_device) != DV_DISK)
372 return (ENODEV);
373
374 if ((error = vfs_rootmountalloc(MOUNT_FFS, "root_device", &mp))) {
375 vrele(rootvp);
376 return (error);
377 }
378
379 /*
380 * We always need to be able to mount the root file system.
381 */
382 mp->mnt_flag |= MNT_FORCE;
383 if ((error = ffs_mountfs(rootvp, mp, l)) != 0) {
384 vfs_unbusy(mp);
385 vfs_rele(mp);
386 return (error);
387 }
388 mp->mnt_flag &= ~MNT_FORCE;
389 mountlist_append(mp);
390 ump = VFSTOUFS(mp);
391 fs = ump->um_fs;
392 memset(fs->fs_fsmnt, 0, sizeof(fs->fs_fsmnt));
393 (void)copystr(mp->mnt_stat.f_mntonname, fs->fs_fsmnt, MNAMELEN - 1, 0);
394 (void)ffs_statvfs(mp, &mp->mnt_stat);
395 vfs_unbusy(mp);
396 setrootfstime((time_t)fs->fs_time);
397 return (0);
398 }
399
400 static int
ffs_acls(struct mount * mp,int fs_flags)401 ffs_acls(struct mount *mp, int fs_flags)
402 {
403 struct ufsmount *ump;
404
405 ump = VFSTOUFS(mp);
406 if (ump->um_fstype == UFS2 && (ump->um_flags & UFS_EA) == 0 &&
407 ((mp->mnt_flag & (MNT_POSIX1EACLS | MNT_NFS4ACLS)) != 0 ||
408 (fs_flags & (FS_POSIX1EACLS | FS_NFS4ACLS)) != 0)) {
409 printf("%s: ACLs requested but not supported by this fs\n",
410 mp->mnt_stat.f_mntonname);
411 return EINVAL;
412 }
413
414 if ((fs_flags & FS_POSIX1EACLS) != 0) {
415 #ifdef UFS_ACL
416 if (mp->mnt_flag & MNT_NFS4ACLS)
417 printf("WARNING: %s: POSIX.1e ACLs flag on fs conflicts "
418 "with \"nfsv4acls\" mount option; option ignored\n",
419 mp->mnt_stat.f_mntonname);
420 mp->mnt_flag &= ~MNT_NFS4ACLS;
421 mp->mnt_flag |= MNT_POSIX1EACLS;
422 #else
423 printf("WARNING: %s: POSIX.1e ACLs flag on fs but no "
424 "ACLs support\n", mp->mnt_stat.f_mntonname);
425 #endif
426 }
427 if ((fs_flags & FS_NFS4ACLS) != 0) {
428 #ifdef UFS_ACL
429 if (mp->mnt_flag & MNT_POSIX1EACLS)
430 printf("WARNING: %s: NFSv4 ACLs flag on fs conflicts "
431 "with \"posix1eacls\" mount option; option ignored\n",
432 mp->mnt_stat.f_mntonname);
433 mp->mnt_flag &= ~MNT_POSIX1EACLS;
434 mp->mnt_flag |= MNT_NFS4ACLS;
435
436 #else
437 printf("WARNING: %s: NFSv4 ACLs flag on fs but no "
438 "ACLs support\n", mp->mnt_stat.f_mntonname);
439 #endif
440 }
441 if ((mp->mnt_flag & (MNT_NFS4ACLS | MNT_POSIX1EACLS))
442 == (MNT_NFS4ACLS | MNT_POSIX1EACLS))
443 {
444 printf("%s: \"posix1eacls\" and \"nfsv4acls\" options "
445 "are mutually exclusive\n",
446 mp->mnt_stat.f_mntonname);
447 return EINVAL;
448 }
449
450 if (mp->mnt_flag & (MNT_NFS4ACLS | MNT_POSIX1EACLS))
451 mp->mnt_iflag &= ~(IMNT_SHRLOOKUP|IMNT_NCLOOKUP);
452 else
453 mp->mnt_iflag |= IMNT_SHRLOOKUP|IMNT_NCLOOKUP;
454 return 0;
455 }
456
457 /*
458 * VFS Operations.
459 *
460 * mount system call
461 */
462 int
ffs_mount(struct mount * mp,const char * path,void * data,size_t * data_len)463 ffs_mount(struct mount *mp, const char *path, void *data, size_t *data_len)
464 {
465 struct lwp *l = curlwp;
466 struct vnode *devvp = NULL;
467 struct ufs_args *args = data;
468 struct ufsmount *ump = NULL;
469 struct fs *fs;
470 int error = 0, flags, update;
471 mode_t accessmode;
472
473 if (args == NULL) {
474 DPRINTF("NULL args");
475 return EINVAL;
476 }
477 if (*data_len < sizeof(*args)) {
478 DPRINTF("bad size args %zu != %zu", *data_len, sizeof(*args));
479 return EINVAL;
480 }
481
482 ump = VFSTOUFS(mp);
483 if ((mp->mnt_flag & (MNT_GETARGS|MNT_UPDATE)) && ump == NULL) {
484 DPRINTF("no ump");
485 return EIO;
486 }
487
488 if (mp->mnt_flag & MNT_GETARGS) {
489 args->fspec = NULL;
490 *data_len = sizeof *args;
491 return 0;
492 }
493
494 update = mp->mnt_flag & MNT_UPDATE;
495
496 /* Check arguments */
497 if (args->fspec == NULL) {
498 if (!update) {
499 /* New mounts must have a filename for the device */
500 DPRINTF("no filename for mount");
501 return EINVAL;
502 }
503 } else {
504 /*
505 * Look up the name and verify that it's sane.
506 */
507 error = namei_simple_user(args->fspec,
508 NSM_FOLLOW_NOEMULROOT, &devvp);
509 if (error != 0) {
510 DPRINTF("namei_simple_user returned %d", error);
511 return error;
512 }
513
514 /*
515 * Be sure this is a valid block device
516 */
517 if (devvp->v_type != VBLK) {
518 DPRINTF("non block device %d", devvp->v_type);
519 error = ENOTBLK;
520 goto fail;
521 }
522
523 if (bdevsw_lookup(devvp->v_rdev) == NULL) {
524 DPRINTF("can't find block device 0x%jx",
525 devvp->v_rdev);
526 error = ENXIO;
527 goto fail;
528 }
529
530 if (update) {
531 /*
532 * Be sure we're still naming the same device
533 * used for our initial mount
534 */
535 if (devvp != ump->um_devvp &&
536 devvp->v_rdev != ump->um_devvp->v_rdev) {
537 DPRINTF("wrong device 0x%jx != 0x%jx",
538 (uintmax_t)devvp->v_rdev,
539 (uintmax_t)ump->um_devvp->v_rdev);
540 error = EINVAL;
541 goto fail;
542 }
543 vrele(devvp);
544 devvp = NULL;
545 }
546 }
547
548 if (devvp == NULL) {
549 devvp = ump->um_devvp;
550 vref(devvp);
551 }
552
553 /*
554 * If mount by non-root, then verify that user has necessary
555 * permissions on the device.
556 *
557 * Permission to update a mount is checked higher, so here we presume
558 * updating the mount is okay (for example, as far as securelevel goes)
559 * which leaves us with the normal check.
560 */
561 accessmode = VREAD;
562 if (update ? (mp->mnt_iflag & IMNT_WANTRDWR) != 0 :
563 (mp->mnt_flag & MNT_RDONLY) == 0)
564 accessmode |= VWRITE;
565 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
566 error = kauth_authorize_system(l->l_cred, KAUTH_SYSTEM_MOUNT,
567 KAUTH_REQ_SYSTEM_MOUNT_DEVICE, mp, devvp, KAUTH_ARG(accessmode));
568 VOP_UNLOCK(devvp);
569 if (error) {
570 DPRINTF("kauth returned %d", error);
571 goto fail;
572 }
573
574 #ifdef WAPBL
575 /* WAPBL can only be enabled on a r/w mount. */
576 if (((mp->mnt_flag & MNT_RDONLY) && !(mp->mnt_iflag & IMNT_WANTRDWR)) ||
577 (mp->mnt_iflag & IMNT_WANTRDONLY)) {
578 mp->mnt_flag &= ~MNT_LOG;
579 }
580 #else /* !WAPBL */
581 mp->mnt_flag &= ~MNT_LOG;
582 #endif /* !WAPBL */
583
584 error = set_statvfs_info(path, UIO_USERSPACE, args->fspec,
585 UIO_USERSPACE, mp->mnt_op->vfs_name, mp, l);
586 if (error)
587 goto fail;
588
589 if (!update) {
590 int xflags;
591
592 if (mp->mnt_flag & MNT_RDONLY)
593 xflags = FREAD;
594 else
595 xflags = FREAD | FWRITE;
596 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
597 error = VOP_OPEN(devvp, xflags, FSCRED);
598 VOP_UNLOCK(devvp);
599 if (error) {
600 DPRINTF("VOP_OPEN returned %d", error);
601 goto fail;
602 }
603 /* Need fstrans_start() for assertion in ufs_strategy(). */
604 if ((mp->mnt_flag & MNT_RDONLY) == 0)
605 fstrans_start(mp);
606 error = ffs_mountfs(devvp, mp, l);
607 if ((mp->mnt_flag & MNT_RDONLY) == 0)
608 fstrans_done(mp);
609 if (error) {
610 DPRINTF("ffs_mountfs returned %d", error);
611 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
612 (void)VOP_CLOSE(devvp, xflags, NOCRED);
613 VOP_UNLOCK(devvp);
614 goto fail;
615 }
616
617 ump = VFSTOUFS(mp);
618 fs = ump->um_fs;
619 } else {
620 /*
621 * Update the mount.
622 */
623
624 /*
625 * The initial mount got a reference on this
626 * device, so drop the one obtained via
627 * namei(), above.
628 */
629 vrele(devvp);
630
631 ump = VFSTOUFS(mp);
632 fs = ump->um_fs;
633 if (fs->fs_ronly == 0 && (mp->mnt_iflag & IMNT_WANTRDONLY)) {
634 /*
635 * Changing from r/w to r/o
636 */
637 flags = WRITECLOSE;
638 if (mp->mnt_flag & MNT_FORCE)
639 flags |= FORCECLOSE;
640 error = ffs_flushfiles(mp, flags, l);
641 if (error)
642 return error;
643
644 error = UFS_WAPBL_BEGIN(mp);
645 if (error) {
646 DPRINTF("wapbl %d", error);
647 return error;
648 }
649
650 if (ffs_cgupdate(ump, MNT_WAIT) == 0 &&
651 fs->fs_clean & FS_WASCLEAN) {
652 if (mp->mnt_flag & MNT_SOFTDEP)
653 fs->fs_flags &= ~FS_DOSOFTDEP;
654 fs->fs_clean = FS_ISCLEAN;
655 (void) ffs_sbupdate(ump, MNT_WAIT);
656 }
657
658 UFS_WAPBL_END(mp);
659 }
660
661 #ifdef WAPBL
662 if ((mp->mnt_flag & MNT_LOG) == 0) {
663 error = ffs_wapbl_stop(mp, mp->mnt_flag & MNT_FORCE);
664 if (error) {
665 DPRINTF("ffs_wapbl_stop returned %d", error);
666 return error;
667 }
668 }
669 #endif /* WAPBL */
670
671 if (fs->fs_ronly == 0 && (mp->mnt_iflag & IMNT_WANTRDONLY)) {
672 /*
673 * Finish change from r/w to r/o
674 */
675 fs->fs_ronly = 1;
676 fs->fs_fmod = 0;
677 }
678
679 error = ffs_acls(mp, fs->fs_flags);
680 if (error)
681 return error;
682 if (mp->mnt_flag & MNT_RELOAD) {
683 error = ffs_reload(mp, l->l_cred, l);
684 if (error) {
685 DPRINTF("ffs_reload returned %d", error);
686 return error;
687 }
688 }
689
690 if (fs->fs_ronly && (mp->mnt_iflag & IMNT_WANTRDWR)) {
691 /*
692 * Changing from read-only to read/write
693 */
694 #ifndef QUOTA2
695 if (fs->fs_flags & FS_DOQUOTA2) {
696 ump->um_flags |= UFS_QUOTA2;
697 uprintf("%s: options QUOTA2 not enabled%s\n",
698 mp->mnt_stat.f_mntonname,
699 (mp->mnt_flag & MNT_FORCE) ? "" :
700 ", not mounting");
701 DPRINTF("ffs_quota2 %d", EINVAL);
702 return EINVAL;
703 }
704 #endif
705 fs->fs_ronly = 0;
706 fs->fs_clean =
707 fs->fs_clean == FS_ISCLEAN ? FS_WASCLEAN : 0;
708 fs->fs_fmod = 1;
709 #ifdef WAPBL
710 if (fs->fs_flags & FS_DOWAPBL) {
711 const char *nm = mp->mnt_stat.f_mntonname;
712 if (!mp->mnt_wapbl_replay) {
713 printf("%s: log corrupted;"
714 " replay cancelled\n", nm);
715 return EFTYPE;
716 }
717 printf("%s: replaying log to disk\n", nm);
718 error = wapbl_replay_write(mp->mnt_wapbl_replay,
719 devvp);
720 if (error) {
721 DPRINTF("%s: wapbl_replay_write %d",
722 nm, error);
723 return error;
724 }
725 wapbl_replay_stop(mp->mnt_wapbl_replay);
726 fs->fs_clean = FS_WASCLEAN;
727 }
728 #endif /* WAPBL */
729 if (fs->fs_snapinum[0] != 0)
730 ffs_snapshot_mount(mp);
731 }
732
733 #ifdef WAPBL
734 error = ffs_wapbl_start(mp);
735 if (error) {
736 DPRINTF("ffs_wapbl_start returned %d", error);
737 return error;
738 }
739 #endif /* WAPBL */
740
741 #ifdef QUOTA2
742 if (!fs->fs_ronly) {
743 error = ffs_quota2_mount(mp);
744 if (error) {
745 DPRINTF("ffs_quota2_mount returned %d", error);
746 return error;
747 }
748 }
749 #endif
750
751 if ((mp->mnt_flag & MNT_DISCARD) && !(ump->um_discarddata))
752 ump->um_discarddata = ffs_discard_init(devvp, fs);
753
754 if (args->fspec == NULL)
755 return 0;
756 }
757
758 (void)strncpy(fs->fs_fsmnt, mp->mnt_stat.f_mntonname,
759 sizeof(fs->fs_fsmnt));
760
761 fs->fs_flags &= ~FS_DOSOFTDEP;
762
763 if ((fs->fs_ronly && (fs->fs_clean & FS_ISCLEAN) == 0) ||
764 (!fs->fs_ronly && (fs->fs_clean & FS_WASCLEAN) == 0)) {
765 printf("%s: file system not clean (fs_clean=%#x); "
766 "please fsck(8)\n", mp->mnt_stat.f_mntfromname,
767 fs->fs_clean);
768 }
769
770 if (fs->fs_fmod != 0) {
771 int err;
772
773 KASSERT(!fs->fs_ronly);
774
775 if (fs->fs_clean & FS_WASCLEAN)
776 fs->fs_time = time_second;
777 fs->fs_fmod = 0;
778 err = UFS_WAPBL_BEGIN(mp);
779 if (err == 0) {
780 (void) ffs_cgupdate(ump, MNT_WAIT);
781 UFS_WAPBL_END(mp);
782 }
783 }
784 if ((mp->mnt_flag & MNT_SOFTDEP) != 0) {
785 printf("%s: `-o softdep' is no longer supported, "
786 "consider `-o log'\n", mp->mnt_stat.f_mntfromname);
787 mp->mnt_flag &= ~MNT_SOFTDEP;
788 }
789
790 return (error);
791
792 fail:
793 vrele(devvp);
794 return (error);
795 }
796
797 /*
798 * Reload all incore data for a filesystem (used after running fsck on
799 * the root filesystem and finding things to fix). The filesystem must
800 * be mounted read-only.
801 *
802 * Things to do to update the mount:
803 * 1) invalidate all cached meta-data.
804 * 2) re-read superblock from disk.
805 * 3) re-read summary information from disk.
806 * 4) invalidate all inactive vnodes.
807 * 5) invalidate all cached file data.
808 * 6) re-read inode data for all active vnodes.
809 */
810 int
ffs_reload(struct mount * mp,kauth_cred_t cred,struct lwp * l)811 ffs_reload(struct mount *mp, kauth_cred_t cred, struct lwp *l)
812 {
813 struct vnode *vp, *devvp;
814 struct inode *ip;
815 void *space;
816 struct buf *bp;
817 struct fs *fs, *newfs;
818 int i, bsize, blks, error;
819 int32_t *lp, fs_sbsize;
820 struct ufsmount *ump;
821 daddr_t sblockloc;
822 struct vnode_iterator *marker;
823
824 if ((mp->mnt_flag & MNT_RDONLY) == 0)
825 return (EINVAL);
826
827 ump = VFSTOUFS(mp);
828
829 /*
830 * Step 1: invalidate all cached meta-data.
831 */
832 devvp = ump->um_devvp;
833 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
834 error = vinvalbuf(devvp, 0, cred, l, 0, 0);
835 VOP_UNLOCK(devvp);
836 if (error)
837 panic("%s: dirty1", __func__);
838
839 /*
840 * Step 2: re-read superblock from disk. XXX: We don't handle
841 * possibility that superblock moved. Which implies that we don't
842 * want its size to change either.
843 */
844 fs = ump->um_fs;
845 fs_sbsize = fs->fs_sbsize;
846 error = bread(devvp, fs->fs_sblockloc / DEV_BSIZE, fs_sbsize,
847 0, &bp);
848 if (error)
849 return (error);
850 newfs = kmem_alloc(fs_sbsize, KM_SLEEP);
851 memcpy(newfs, bp->b_data, fs_sbsize);
852
853 #ifdef FFS_EI
854 if (ump->um_flags & UFS_NEEDSWAP) {
855 ffs_sb_swap((struct fs *)bp->b_data, newfs);
856 newfs->fs_flags |= FS_SWAPPED;
857 } else
858 #endif
859 newfs->fs_flags &= ~FS_SWAPPED;
860
861 brelse(bp, 0);
862
863 /* Allow converting from UFS2 to UFS2EA but not vice versa. */
864 if (newfs->fs_magic == FS_UFS2EA_MAGIC) {
865 ump->um_flags |= UFS_EA;
866 newfs->fs_magic = FS_UFS2_MAGIC;
867 } else {
868 if ((ump->um_flags & UFS_EA) != 0)
869 return EINVAL;
870 }
871
872 if ((newfs->fs_magic != FS_UFS1_MAGIC) &&
873 (newfs->fs_magic != FS_UFS2_MAGIC)) {
874 kmem_free(newfs, fs_sbsize);
875 return (EIO); /* XXX needs translation */
876 }
877 if (!ffs_superblock_validate(newfs)) {
878 kmem_free(newfs, fs_sbsize);
879 return (EINVAL);
880 }
881
882 /*
883 * The current implementation doesn't handle the possibility that
884 * these values may have changed.
885 */
886 if ((newfs->fs_sbsize != fs_sbsize) ||
887 (newfs->fs_cssize != fs->fs_cssize) ||
888 (newfs->fs_contigsumsize != fs->fs_contigsumsize) ||
889 (newfs->fs_ncg != fs->fs_ncg)) {
890 kmem_free(newfs, fs_sbsize);
891 return (EINVAL);
892 }
893
894 /* Store off old fs_sblockloc for fs_oldfscompat_read. */
895 sblockloc = fs->fs_sblockloc;
896 /*
897 * Copy pointer fields back into superblock before copying in XXX
898 * new superblock. These should really be in the ufsmount. XXX
899 * Note that important parameters (eg fs_ncg) are unchanged.
900 */
901 newfs->fs_csp = fs->fs_csp;
902 newfs->fs_maxcluster = fs->fs_maxcluster;
903 newfs->fs_contigdirs = fs->fs_contigdirs;
904 newfs->fs_ronly = fs->fs_ronly;
905 newfs->fs_active = fs->fs_active;
906 memcpy(fs, newfs, (u_int)fs_sbsize);
907 kmem_free(newfs, fs_sbsize);
908
909 /*
910 * Recheck for Apple UFS filesystem.
911 */
912 ump->um_flags &= ~UFS_ISAPPLEUFS;
913 if (ffs_is_appleufs(devvp, fs)) {
914 #ifdef APPLE_UFS
915 ump->um_flags |= UFS_ISAPPLEUFS;
916 #else
917 DPRINTF("AppleUFS not supported");
918 return (EIO); /* XXX: really? */
919 #endif
920 }
921
922 if (UFS_MPISAPPLEUFS(ump)) {
923 /* see comment about NeXT below */
924 ump->um_maxsymlinklen = APPLEUFS_MAXSYMLINKLEN;
925 ump->um_dirblksiz = APPLEUFS_DIRBLKSIZ;
926 mp->mnt_iflag |= IMNT_DTYPE;
927 } else {
928 ump->um_maxsymlinklen = fs->fs_maxsymlinklen;
929 ump->um_dirblksiz = UFS_DIRBLKSIZ;
930 if (ump->um_maxsymlinklen > 0)
931 mp->mnt_iflag |= IMNT_DTYPE;
932 else
933 mp->mnt_iflag &= ~IMNT_DTYPE;
934 }
935 ffs_oldfscompat_read(fs, ump, sblockloc);
936
937 mutex_enter(&ump->um_lock);
938 ump->um_maxfilesize = fs->fs_maxfilesize;
939 if (fs->fs_flags & ~(FS_KNOWN_FLAGS | FS_INTERNAL)) {
940 uprintf("%s: unknown ufs flags: 0x%08"PRIx32"%s\n",
941 mp->mnt_stat.f_mntonname, fs->fs_flags,
942 (mp->mnt_flag & MNT_FORCE) ? "" : ", not mounting");
943 if ((mp->mnt_flag & MNT_FORCE) == 0) {
944 mutex_exit(&ump->um_lock);
945 return (EINVAL);
946 }
947 }
948
949 if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) {
950 fs->fs_pendingblocks = 0;
951 fs->fs_pendinginodes = 0;
952 }
953 mutex_exit(&ump->um_lock);
954
955 ffs_statvfs(mp, &mp->mnt_stat);
956 /*
957 * Step 3: re-read summary information from disk.
958 */
959 blks = howmany(fs->fs_cssize, fs->fs_fsize);
960 space = fs->fs_csp;
961 for (i = 0; i < blks; i += fs->fs_frag) {
962 bsize = fs->fs_bsize;
963 if (i + fs->fs_frag > blks)
964 bsize = (blks - i) * fs->fs_fsize;
965 error = bread(devvp, FFS_FSBTODB(fs, fs->fs_csaddr + i), bsize,
966 0, &bp);
967 if (error) {
968 return (error);
969 }
970 #ifdef FFS_EI
971 if (UFS_FSNEEDSWAP(fs))
972 ffs_csum_swap((struct csum *)bp->b_data,
973 (struct csum *)space, bsize);
974 else
975 #endif
976 memcpy(space, bp->b_data, (size_t)bsize);
977 space = (char *)space + bsize;
978 brelse(bp, 0);
979 }
980 /*
981 * We no longer know anything about clusters per cylinder group.
982 */
983 if (fs->fs_contigsumsize > 0) {
984 lp = fs->fs_maxcluster;
985 for (i = 0; i < fs->fs_ncg; i++)
986 *lp++ = fs->fs_contigsumsize;
987 }
988
989 vfs_vnode_iterator_init(mp, &marker);
990 while ((vp = vfs_vnode_iterator_next(marker, NULL, NULL))) {
991 /*
992 * Step 4: invalidate all inactive vnodes.
993 */
994 if (vrecycle(vp))
995 continue;
996 /*
997 * Step 5: invalidate all cached file data.
998 */
999 if (vn_lock(vp, LK_EXCLUSIVE)) {
1000 vrele(vp);
1001 continue;
1002 }
1003 if (vinvalbuf(vp, 0, cred, l, 0, 0))
1004 panic("%s: dirty2", __func__);
1005 /*
1006 * Step 6: re-read inode data for all active vnodes.
1007 */
1008 ip = VTOI(vp);
1009 error = bread(devvp, FFS_FSBTODB(fs, ino_to_fsba(fs, ip->i_number)),
1010 (int)fs->fs_bsize, 0, &bp);
1011 if (error) {
1012 vput(vp);
1013 break;
1014 }
1015 ffs_load_inode(bp, ip, fs, ip->i_number);
1016 brelse(bp, 0);
1017 vput(vp);
1018 }
1019 vfs_vnode_iterator_destroy(marker);
1020 return (error);
1021 }
1022
1023 /*
1024 * Possible superblock locations ordered from most to least likely.
1025 */
1026 static const int sblock_try[] = SBLOCKSEARCH;
1027
1028
1029 static int
ffs_superblock_validate(struct fs * fs)1030 ffs_superblock_validate(struct fs *fs)
1031 {
1032 int32_t i, fs_bshift = 0, fs_fshift = 0, fs_fragshift = 0, fs_frag;
1033 int32_t fs_inopb;
1034
1035 /* Check the superblock size */
1036 if (fs->fs_sbsize > SBLOCKSIZE || fs->fs_sbsize < sizeof(struct fs))
1037 return 0;
1038
1039 /* Check the file system blocksize */
1040 if (fs->fs_bsize > MAXBSIZE || fs->fs_bsize < MINBSIZE)
1041 return 0;
1042 if (!powerof2(fs->fs_bsize))
1043 return 0;
1044
1045 /* Check the size of frag blocks */
1046 if (!powerof2(fs->fs_fsize))
1047 return 0;
1048 if (fs->fs_fsize == 0)
1049 return 0;
1050
1051 /*
1052 * XXX: these values are just zero-checked to prevent obvious
1053 * bugs. We need more strict checks.
1054 */
1055 if (fs->fs_size == 0 && fs->fs_old_size == 0)
1056 return 0;
1057 if (fs->fs_cssize == 0)
1058 return 0;
1059 if (fs->fs_ipg == 0)
1060 return 0;
1061 if (fs->fs_fpg == 0)
1062 return 0;
1063 if (fs->fs_ncg == 0)
1064 return 0;
1065 if (fs->fs_maxbpg == 0)
1066 return 0;
1067
1068 /* Check the number of inodes per block */
1069 if (fs->fs_magic == FS_UFS1_MAGIC)
1070 fs_inopb = fs->fs_bsize / sizeof(struct ufs1_dinode);
1071 else /* fs->fs_magic == FS_UFS2_MAGIC */
1072 fs_inopb = fs->fs_bsize / sizeof(struct ufs2_dinode);
1073 if (fs->fs_inopb != fs_inopb)
1074 return 0;
1075
1076 /* Block size cannot be smaller than fragment size */
1077 if (fs->fs_bsize < fs->fs_fsize)
1078 return 0;
1079
1080 /* Compute fs_bshift and ensure it is consistent */
1081 for (i = fs->fs_bsize; i > 1; i >>= 1)
1082 fs_bshift++;
1083 if (fs->fs_bshift != fs_bshift)
1084 return 0;
1085
1086 /* Compute fs_fshift and ensure it is consistent */
1087 for (i = fs->fs_fsize; i > 1; i >>= 1)
1088 fs_fshift++;
1089 if (fs->fs_fshift != fs_fshift)
1090 return 0;
1091
1092 /* Compute fs_fragshift and ensure it is consistent */
1093 for (i = fs->fs_frag; i > 1; i >>= 1)
1094 fs_fragshift++;
1095 if (fs->fs_fragshift != fs_fragshift)
1096 return 0;
1097
1098 /* Check the masks */
1099 if (fs->fs_bmask != ~(fs->fs_bsize - 1))
1100 return 0;
1101 if (fs->fs_fmask != ~(fs->fs_fsize - 1))
1102 return 0;
1103
1104 /*
1105 * Now that the shifts and masks are sanitized, we can use the ffs_ API.
1106 */
1107
1108 /* Check the number of frag blocks */
1109 if ((fs_frag = ffs_numfrags(fs, fs->fs_bsize)) > MAXFRAG)
1110 return 0;
1111 if (fs->fs_frag != fs_frag)
1112 return 0;
1113
1114 /* Check the size of cylinder groups */
1115 if ((fs->fs_cgsize < sizeof(struct cg)) ||
1116 (fs->fs_cgsize > fs->fs_bsize))
1117 return 0;
1118
1119 return 1;
1120 }
1121
1122 static int
ffs_is_appleufs(struct vnode * devvp,struct fs * fs)1123 ffs_is_appleufs(struct vnode *devvp, struct fs *fs)
1124 {
1125 struct dkwedge_info dkw;
1126 int ret = 0;
1127
1128 /*
1129 * First check to see if this is tagged as an Apple UFS filesystem
1130 * in the disklabel.
1131 */
1132 if (getdiskinfo(devvp, &dkw) == 0 &&
1133 strcmp(dkw.dkw_ptype, DKW_PTYPE_APPLEUFS) == 0)
1134 ret = 1;
1135 #ifdef APPLE_UFS
1136 else {
1137 struct appleufslabel *applefs;
1138 struct buf *bp;
1139 daddr_t blkno = APPLEUFS_LABEL_OFFSET / DEV_BSIZE;
1140 int error;
1141
1142 /*
1143 * Manually look for an Apple UFS label, and if a valid one
1144 * is found, then treat it like an Apple UFS filesystem anyway.
1145 */
1146 error = bread(devvp, blkno, APPLEUFS_LABEL_SIZE, 0, &bp);
1147 if (error) {
1148 DPRINTF("bread@0x%jx returned %d", (intmax_t)blkno, error);
1149 return 0;
1150 }
1151 applefs = (struct appleufslabel *)bp->b_data;
1152 error = ffs_appleufs_validate(fs->fs_fsmnt, applefs, NULL);
1153 if (error == 0)
1154 ret = 1;
1155 brelse(bp, 0);
1156 }
1157 #endif
1158
1159 return ret;
1160 }
1161
1162 /*
1163 * Common code for mount and mountroot
1164 */
1165 int
ffs_mountfs(struct vnode * devvp,struct mount * mp,struct lwp * l)1166 ffs_mountfs(struct vnode *devvp, struct mount *mp, struct lwp *l)
1167 {
1168 struct ufsmount *ump = NULL;
1169 struct buf *bp = NULL;
1170 struct fs *fs = NULL;
1171 dev_t dev;
1172 void *space;
1173 daddr_t sblockloc = 0;
1174 int blks, fstype = 0;
1175 int error, i, bsize, ronly, bset = 0;
1176 #ifdef FFS_EI
1177 int needswap = 0; /* keep gcc happy */
1178 #endif
1179 int32_t *lp;
1180 kauth_cred_t cred;
1181 u_int32_t allocsbsize, fs_sbsize = 0;
1182
1183 dev = devvp->v_rdev;
1184 cred = l ? l->l_cred : NOCRED;
1185
1186 /* Flush out any old buffers remaining from a previous use. */
1187 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
1188 error = vinvalbuf(devvp, V_SAVE, cred, l, 0, 0);
1189 VOP_UNLOCK(devvp);
1190 if (error) {
1191 DPRINTF("vinvalbuf returned %d", error);
1192 return error;
1193 }
1194
1195 ronly = (mp->mnt_flag & MNT_RDONLY) != 0;
1196
1197 ump = kmem_zalloc(sizeof(*ump), KM_SLEEP);
1198 mutex_init(&ump->um_lock, MUTEX_DEFAULT, IPL_NONE);
1199 error = ffs_snapshot_init(ump);
1200 if (error) {
1201 DPRINTF("ffs_snapshot_init returned %d", error);
1202 goto out;
1203 }
1204 ump->um_ops = &ffs_ufsops;
1205
1206 #ifdef WAPBL
1207 sbagain:
1208 #endif
1209 /*
1210 * Try reading the superblock in each of its possible locations.
1211 */
1212 for (i = 0; ; i++) {
1213 daddr_t fs_sblockloc;
1214
1215 if (bp != NULL) {
1216 brelse(bp, BC_NOCACHE);
1217 bp = NULL;
1218 }
1219 if (sblock_try[i] == -1) {
1220 DPRINTF("no superblock found");
1221 error = EINVAL;
1222 fs = NULL;
1223 goto out;
1224 }
1225
1226 error = bread(devvp, sblock_try[i] / DEV_BSIZE, SBLOCKSIZE,
1227 0, &bp);
1228 if (error) {
1229 DPRINTF("bread@0x%x returned %d",
1230 sblock_try[i] / DEV_BSIZE, error);
1231 fs = NULL;
1232 goto out;
1233 }
1234 fs = (struct fs *)bp->b_data;
1235
1236 sblockloc = sblock_try[i];
1237 DPRINTF("fs_magic 0x%x", fs->fs_magic);
1238
1239 /*
1240 * Swap: here, we swap fs->fs_sbsize in order to get the correct
1241 * size to read the superblock. Once read, we swap the whole
1242 * superblock structure.
1243 */
1244 if (fs->fs_magic == FS_UFS2EA_MAGIC) {
1245 ump->um_flags |= UFS_EA;
1246 fs->fs_magic = FS_UFS2_MAGIC;
1247 } else if (fs->fs_magic == FS_UFS2EA_MAGIC_SWAPPED) {
1248 ump->um_flags |= UFS_EA;
1249 fs->fs_magic = FS_UFS2_MAGIC_SWAPPED;
1250 }
1251 if (fs->fs_magic == FS_UFS1_MAGIC) {
1252 fs_sbsize = fs->fs_sbsize;
1253 fstype = UFS1;
1254 #ifdef FFS_EI
1255 needswap = 0;
1256 } else if (fs->fs_magic == FS_UFS1_MAGIC_SWAPPED) {
1257 fs_sbsize = bswap32(fs->fs_sbsize);
1258 fstype = UFS1;
1259 needswap = 1;
1260 #endif
1261 } else if (fs->fs_magic == FS_UFS2_MAGIC) {
1262 fs_sbsize = fs->fs_sbsize;
1263 fstype = UFS2;
1264 #ifdef FFS_EI
1265 needswap = 0;
1266 } else if (fs->fs_magic == FS_UFS2_MAGIC_SWAPPED) {
1267 fs_sbsize = bswap32(fs->fs_sbsize);
1268 fstype = UFS2;
1269 needswap = 1;
1270 #endif
1271 } else
1272 continue;
1273
1274 /* fs->fs_sblockloc isn't defined for old filesystems */
1275 if (fstype == UFS1 && !(fs->fs_old_flags & FS_FLAGS_UPDATED)) {
1276 if (sblockloc == SBLOCK_UFS2)
1277 /*
1278 * This is likely to be the first alternate
1279 * in a filesystem with 64k blocks.
1280 * Don't use it.
1281 */
1282 continue;
1283 fs_sblockloc = sblockloc;
1284 } else {
1285 fs_sblockloc = fs->fs_sblockloc;
1286 #ifdef FFS_EI
1287 if (needswap)
1288 fs_sblockloc = bswap64(fs_sblockloc);
1289 #endif
1290 }
1291
1292 /* Check we haven't found an alternate superblock */
1293 if (fs_sblockloc != sblockloc)
1294 continue;
1295
1296 /* Check the superblock size */
1297 if (fs_sbsize > SBLOCKSIZE || fs_sbsize < sizeof(struct fs))
1298 continue;
1299 fs = kmem_alloc((u_long)fs_sbsize, KM_SLEEP);
1300 memcpy(fs, bp->b_data, fs_sbsize);
1301
1302 /* Swap the whole superblock structure, if necessary. */
1303 #ifdef FFS_EI
1304 if (needswap) {
1305 ffs_sb_swap((struct fs*)bp->b_data, fs);
1306 fs->fs_flags |= FS_SWAPPED;
1307 } else
1308 #endif
1309 fs->fs_flags &= ~FS_SWAPPED;
1310
1311 /*
1312 * Now that everything is swapped, the superblock is ready to
1313 * be sanitized.
1314 */
1315 if (!ffs_superblock_validate(fs)) {
1316 kmem_free(fs, fs_sbsize);
1317 continue;
1318 }
1319
1320 /* Ok seems to be a good superblock */
1321 break;
1322 }
1323
1324 ump->um_fs = fs;
1325
1326 #ifdef WAPBL
1327 if ((mp->mnt_wapbl_replay == 0) && (fs->fs_flags & FS_DOWAPBL)) {
1328 error = ffs_wapbl_replay_start(mp, fs, devvp);
1329 if (error && (mp->mnt_flag & MNT_FORCE) == 0) {
1330 DPRINTF("ffs_wapbl_replay_start returned %d", error);
1331 goto out;
1332 }
1333 if (!error) {
1334 if (!ronly) {
1335 /* XXX fsmnt may be stale. */
1336 printf("%s: replaying log to disk\n",
1337 fs->fs_fsmnt);
1338 error = wapbl_replay_write(mp->mnt_wapbl_replay,
1339 devvp);
1340 if (error) {
1341 DPRINTF("wapbl_replay_write returned %d",
1342 error);
1343 goto out;
1344 }
1345 wapbl_replay_stop(mp->mnt_wapbl_replay);
1346 fs->fs_clean = FS_WASCLEAN;
1347 } else {
1348 /* XXX fsmnt may be stale */
1349 printf("%s: replaying log to memory\n",
1350 fs->fs_fsmnt);
1351 }
1352
1353 /* Force a re-read of the superblock */
1354 brelse(bp, BC_INVAL);
1355 bp = NULL;
1356 kmem_free(fs, fs_sbsize);
1357 fs = NULL;
1358 goto sbagain;
1359 }
1360 }
1361 #else /* !WAPBL */
1362 if ((fs->fs_flags & FS_DOWAPBL) && (mp->mnt_flag & MNT_FORCE) == 0) {
1363 error = EPERM;
1364 DPRINTF("no force %d", error);
1365 goto out;
1366 }
1367 #endif /* !WAPBL */
1368
1369 ffs_oldfscompat_read(fs, ump, sblockloc);
1370 ump->um_maxfilesize = fs->fs_maxfilesize;
1371
1372 if (fs->fs_flags & ~(FS_KNOWN_FLAGS | FS_INTERNAL)) {
1373 uprintf("%s: unknown ufs flags: 0x%08"PRIx32"%s\n",
1374 mp->mnt_stat.f_mntonname, fs->fs_flags,
1375 (mp->mnt_flag & MNT_FORCE) ? "" : ", not mounting");
1376 if ((mp->mnt_flag & MNT_FORCE) == 0) {
1377 error = EINVAL;
1378 DPRINTF("no force %d", error);
1379 goto out;
1380 }
1381 }
1382
1383 fs->fs_fmod = 0;
1384 if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) {
1385 fs->fs_pendingblocks = 0;
1386 fs->fs_pendinginodes = 0;
1387 }
1388
1389 ump->um_fstype = fstype;
1390 if (fs->fs_sbsize < SBLOCKSIZE)
1391 brelse(bp, BC_INVAL);
1392 else
1393 brelse(bp, 0);
1394 bp = NULL;
1395
1396 if (ffs_is_appleufs(devvp, fs)) {
1397 #ifdef APPLE_UFS
1398 ump->um_flags |= UFS_ISAPPLEUFS;
1399 #else
1400 DPRINTF("AppleUFS not supported");
1401 error = EINVAL;
1402 goto out;
1403 #endif
1404 }
1405
1406 #if 0
1407 /*
1408 * XXX This code changes the behaviour of mounting dirty filesystems, to
1409 * XXX require "mount -f ..." to mount them. This doesn't match what
1410 * XXX mount(8) describes and is disabled for now.
1411 */
1412 /*
1413 * If the file system is not clean, don't allow it to be mounted
1414 * unless MNT_FORCE is specified. (Note: MNT_FORCE is always set
1415 * for the root file system.)
1416 */
1417 if (fs->fs_flags & FS_DOWAPBL) {
1418 /*
1419 * wapbl normally expects to be FS_WASCLEAN when the FS_DOWAPBL
1420 * bit is set, although there's a window in unmount where it
1421 * could be FS_ISCLEAN
1422 */
1423 if ((mp->mnt_flag & MNT_FORCE) == 0 &&
1424 (fs->fs_clean & (FS_WASCLEAN | FS_ISCLEAN)) == 0) {
1425 error = EPERM;
1426 goto out;
1427 }
1428 } else
1429 if ((fs->fs_clean & FS_ISCLEAN) == 0 &&
1430 (mp->mnt_flag & MNT_FORCE) == 0) {
1431 error = EPERM;
1432 goto out;
1433 }
1434 #endif
1435
1436 /*
1437 * Verify that we can access the last block in the fs
1438 * if we're mounting read/write.
1439 */
1440 if (!ronly) {
1441 error = bread(devvp, FFS_FSBTODB(fs, fs->fs_size - 1),
1442 fs->fs_fsize, 0, &bp);
1443 if (error) {
1444 DPRINTF("bread@0x%jx returned %d",
1445 (intmax_t)FFS_FSBTODB(fs, fs->fs_size - 1),
1446 error);
1447 bset = BC_INVAL;
1448 goto out;
1449 }
1450 if (bp->b_bcount != fs->fs_fsize) {
1451 DPRINTF("bcount %x != fsize %x", bp->b_bcount,
1452 fs->fs_fsize);
1453 error = EINVAL;
1454 bset = BC_INVAL;
1455 goto out;
1456 }
1457 brelse(bp, BC_INVAL);
1458 bp = NULL;
1459 }
1460
1461 fs->fs_ronly = ronly;
1462 /* Don't bump fs_clean if we're replaying journal */
1463 if (!((fs->fs_flags & FS_DOWAPBL) && (fs->fs_clean & FS_WASCLEAN))) {
1464 if (ronly == 0) {
1465 fs->fs_clean =
1466 fs->fs_clean == FS_ISCLEAN ? FS_WASCLEAN : 0;
1467 fs->fs_fmod = 1;
1468 }
1469 }
1470
1471 bsize = fs->fs_cssize;
1472 blks = howmany(bsize, fs->fs_fsize);
1473 if (fs->fs_contigsumsize > 0)
1474 bsize += fs->fs_ncg * sizeof(int32_t);
1475 bsize += fs->fs_ncg * sizeof(*fs->fs_contigdirs);
1476 allocsbsize = bsize;
1477 space = kmem_alloc((u_long)allocsbsize, KM_SLEEP);
1478 fs->fs_csp = space;
1479
1480 for (i = 0; i < blks; i += fs->fs_frag) {
1481 bsize = fs->fs_bsize;
1482 if (i + fs->fs_frag > blks)
1483 bsize = (blks - i) * fs->fs_fsize;
1484 error = bread(devvp, FFS_FSBTODB(fs, fs->fs_csaddr + i), bsize,
1485 0, &bp);
1486 if (error) {
1487 DPRINTF("bread@0x%jx %d",
1488 (intmax_t)FFS_FSBTODB(fs, fs->fs_csaddr + i),
1489 error);
1490 goto out1;
1491 }
1492 #ifdef FFS_EI
1493 if (needswap)
1494 ffs_csum_swap((struct csum *)bp->b_data,
1495 (struct csum *)space, bsize);
1496 else
1497 #endif
1498 memcpy(space, bp->b_data, (u_int)bsize);
1499
1500 space = (char *)space + bsize;
1501 brelse(bp, 0);
1502 bp = NULL;
1503 }
1504 if (fs->fs_contigsumsize > 0) {
1505 fs->fs_maxcluster = lp = space;
1506 for (i = 0; i < fs->fs_ncg; i++)
1507 *lp++ = fs->fs_contigsumsize;
1508 space = lp;
1509 }
1510 bsize = fs->fs_ncg * sizeof(*fs->fs_contigdirs);
1511 fs->fs_contigdirs = space;
1512 space = (char *)space + bsize;
1513 memset(fs->fs_contigdirs, 0, bsize);
1514
1515 /* Compatibility for old filesystems - XXX */
1516 if (fs->fs_avgfilesize <= 0)
1517 fs->fs_avgfilesize = AVFILESIZ;
1518 if (fs->fs_avgfpdir <= 0)
1519 fs->fs_avgfpdir = AFPDIR;
1520 fs->fs_active = NULL;
1521
1522 mp->mnt_data = ump;
1523 mp->mnt_stat.f_fsidx.__fsid_val[0] = (long)dev;
1524 mp->mnt_stat.f_fsidx.__fsid_val[1] = makefstype(MOUNT_FFS);
1525 mp->mnt_stat.f_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0];
1526 mp->mnt_stat.f_namemax = FFS_MAXNAMLEN;
1527 if (UFS_MPISAPPLEUFS(ump)) {
1528 /* NeXT used to keep short symlinks in the inode even
1529 * when using FS_42INODEFMT. In that case fs->fs_maxsymlinklen
1530 * is probably -1, but we still need to be able to identify
1531 * short symlinks.
1532 */
1533 ump->um_maxsymlinklen = APPLEUFS_MAXSYMLINKLEN;
1534 ump->um_dirblksiz = APPLEUFS_DIRBLKSIZ;
1535 mp->mnt_iflag |= IMNT_DTYPE;
1536 } else {
1537 ump->um_maxsymlinklen = fs->fs_maxsymlinklen;
1538 ump->um_dirblksiz = UFS_DIRBLKSIZ;
1539 if (ump->um_maxsymlinklen > 0)
1540 mp->mnt_iflag |= IMNT_DTYPE;
1541 else
1542 mp->mnt_iflag &= ~IMNT_DTYPE;
1543 }
1544 mp->mnt_fs_bshift = fs->fs_bshift;
1545 mp->mnt_dev_bshift = DEV_BSHIFT; /* XXX */
1546 mp->mnt_flag |= MNT_LOCAL;
1547 mp->mnt_iflag |= IMNT_MPSAFE | IMNT_CAN_RWTORO | IMNT_SHRLOOKUP |
1548 IMNT_NCLOOKUP;
1549 #ifdef FFS_EI
1550 if (needswap)
1551 ump->um_flags |= UFS_NEEDSWAP;
1552 #endif
1553 error = ffs_acls(mp, fs->fs_flags);
1554 if (error)
1555 goto out1;
1556 ump->um_mountp = mp;
1557 ump->um_dev = dev;
1558 ump->um_devvp = devvp;
1559 ump->um_nindir = fs->fs_nindir;
1560 ump->um_lognindir = ffs(fs->fs_nindir) - 1;
1561 ump->um_bptrtodb = fs->fs_fshift - DEV_BSHIFT;
1562 ump->um_seqinc = fs->fs_frag;
1563 for (i = 0; i < MAXQUOTAS; i++)
1564 ump->um_quotas[i] = NULLVP;
1565 spec_node_setmountedfs(devvp, mp);
1566 if (ronly == 0 && fs->fs_snapinum[0] != 0)
1567 ffs_snapshot_mount(mp);
1568 #ifdef WAPBL
1569 if (!ronly) {
1570 KDASSERT(fs->fs_ronly == 0);
1571 /*
1572 * ffs_wapbl_start() needs mp->mnt_stat initialised if it
1573 * needs to create a new log file in-filesystem.
1574 */
1575 error = ffs_statvfs(mp, &mp->mnt_stat);
1576 if (error) {
1577 DPRINTF("ffs_statvfs returned %d", error);
1578 goto out1;
1579 }
1580
1581 error = ffs_wapbl_start(mp);
1582 if (error) {
1583 DPRINTF("ffs_wapbl_start returned %d", error);
1584 goto out1;
1585 }
1586 }
1587 #endif /* WAPBL */
1588 if (ronly == 0) {
1589 #ifdef QUOTA2
1590 error = ffs_quota2_mount(mp);
1591 if (error) {
1592 DPRINTF("ffs_quota2_mount returned %d", error);
1593 goto out1;
1594 }
1595 #else
1596 if (fs->fs_flags & FS_DOQUOTA2) {
1597 ump->um_flags |= UFS_QUOTA2;
1598 uprintf("%s: options QUOTA2 not enabled%s\n",
1599 mp->mnt_stat.f_mntonname,
1600 (mp->mnt_flag & MNT_FORCE) ? "" : ", not mounting");
1601 if ((mp->mnt_flag & MNT_FORCE) == 0) {
1602 error = EINVAL;
1603 DPRINTF("quota disabled %d", error);
1604 goto out1;
1605 }
1606 }
1607 #endif
1608 }
1609
1610 if (mp->mnt_flag & MNT_DISCARD)
1611 ump->um_discarddata = ffs_discard_init(devvp, fs);
1612
1613 return (0);
1614 out1:
1615 kmem_free(fs->fs_csp, allocsbsize);
1616 out:
1617 #ifdef WAPBL
1618 if (mp->mnt_wapbl_replay) {
1619 wapbl_replay_stop(mp->mnt_wapbl_replay);
1620 wapbl_replay_free(mp->mnt_wapbl_replay);
1621 mp->mnt_wapbl_replay = 0;
1622 }
1623 #endif
1624
1625 if (fs)
1626 kmem_free(fs, fs->fs_sbsize);
1627 spec_node_setmountedfs(devvp, NULL);
1628 if (bp)
1629 brelse(bp, bset);
1630 if (ump) {
1631 if (ump->um_oldfscompat)
1632 kmem_free(ump->um_oldfscompat, 512 + 3*sizeof(int32_t));
1633 mutex_destroy(&ump->um_lock);
1634 kmem_free(ump, sizeof(*ump));
1635 mp->mnt_data = NULL;
1636 }
1637 return (error);
1638 }
1639
1640 /*
1641 * Sanity checks for loading old filesystem superblocks.
1642 * See ffs_oldfscompat_write below for unwound actions.
1643 *
1644 * XXX - Parts get retired eventually.
1645 * Unfortunately new bits get added.
1646 */
1647 static void
ffs_oldfscompat_read(struct fs * fs,struct ufsmount * ump,daddr_t sblockloc)1648 ffs_oldfscompat_read(struct fs *fs, struct ufsmount *ump, daddr_t sblockloc)
1649 {
1650 off_t maxfilesize;
1651 int32_t *extrasave;
1652
1653 if ((fs->fs_magic != FS_UFS1_MAGIC) ||
1654 (fs->fs_old_flags & FS_FLAGS_UPDATED))
1655 return;
1656
1657 if (!ump->um_oldfscompat)
1658 ump->um_oldfscompat = kmem_alloc(512 + 3*sizeof(int32_t),
1659 KM_SLEEP);
1660
1661 memcpy(ump->um_oldfscompat, &fs->fs_old_postbl_start, 512);
1662 extrasave = ump->um_oldfscompat;
1663 extrasave += 512/sizeof(int32_t);
1664 extrasave[0] = fs->fs_old_npsect;
1665 extrasave[1] = fs->fs_old_interleave;
1666 extrasave[2] = fs->fs_old_trackskew;
1667
1668 /* These fields will be overwritten by their
1669 * original values in fs_oldfscompat_write, so it is harmless
1670 * to modify them here.
1671 */
1672 fs->fs_cstotal.cs_ndir = fs->fs_old_cstotal.cs_ndir;
1673 fs->fs_cstotal.cs_nbfree = fs->fs_old_cstotal.cs_nbfree;
1674 fs->fs_cstotal.cs_nifree = fs->fs_old_cstotal.cs_nifree;
1675 fs->fs_cstotal.cs_nffree = fs->fs_old_cstotal.cs_nffree;
1676
1677 fs->fs_maxbsize = fs->fs_bsize;
1678 fs->fs_time = fs->fs_old_time;
1679 fs->fs_size = fs->fs_old_size;
1680 fs->fs_dsize = fs->fs_old_dsize;
1681 fs->fs_csaddr = fs->fs_old_csaddr;
1682 fs->fs_sblockloc = sblockloc;
1683
1684 fs->fs_flags = fs->fs_old_flags | (fs->fs_flags & FS_INTERNAL);
1685
1686 if (fs->fs_old_postblformat == FS_42POSTBLFMT) {
1687 fs->fs_old_nrpos = 8;
1688 fs->fs_old_npsect = fs->fs_old_nsect;
1689 fs->fs_old_interleave = 1;
1690 fs->fs_old_trackskew = 0;
1691 }
1692
1693 if (fs->fs_magic == FS_UFS1_MAGIC &&
1694 fs->fs_old_inodefmt < FS_44INODEFMT) {
1695 fs->fs_maxfilesize = (u_quad_t) 1LL << 39;
1696 fs->fs_qbmask = ~fs->fs_bmask;
1697 fs->fs_qfmask = ~fs->fs_fmask;
1698 }
1699
1700 maxfilesize = (u_int64_t)0x80000000 * fs->fs_bsize - 1;
1701 if (fs->fs_maxfilesize > maxfilesize)
1702 fs->fs_maxfilesize = maxfilesize;
1703
1704 /* Compatibility for old filesystems */
1705 if (fs->fs_avgfilesize <= 0)
1706 fs->fs_avgfilesize = AVFILESIZ;
1707 if (fs->fs_avgfpdir <= 0)
1708 fs->fs_avgfpdir = AFPDIR;
1709
1710 #if 0
1711 if (bigcgs) {
1712 fs->fs_save_cgsize = fs->fs_cgsize;
1713 fs->fs_cgsize = fs->fs_bsize;
1714 }
1715 #endif
1716 }
1717
1718 /*
1719 * Unwinding superblock updates for old filesystems.
1720 * See ffs_oldfscompat_read above for details.
1721 *
1722 * XXX - Parts get retired eventually.
1723 * Unfortunately new bits get added.
1724 */
1725 static void
ffs_oldfscompat_write(struct fs * fs,struct ufsmount * ump)1726 ffs_oldfscompat_write(struct fs *fs, struct ufsmount *ump)
1727 {
1728 int32_t *extrasave;
1729
1730 if ((fs->fs_magic != FS_UFS1_MAGIC) ||
1731 (fs->fs_old_flags & FS_FLAGS_UPDATED))
1732 return;
1733
1734 fs->fs_old_time = fs->fs_time;
1735 fs->fs_old_cstotal.cs_ndir = fs->fs_cstotal.cs_ndir;
1736 fs->fs_old_cstotal.cs_nbfree = fs->fs_cstotal.cs_nbfree;
1737 fs->fs_old_cstotal.cs_nifree = fs->fs_cstotal.cs_nifree;
1738 fs->fs_old_cstotal.cs_nffree = fs->fs_cstotal.cs_nffree;
1739 fs->fs_old_flags = fs->fs_flags;
1740
1741 #if 0
1742 if (bigcgs) {
1743 fs->fs_cgsize = fs->fs_save_cgsize;
1744 }
1745 #endif
1746
1747 memcpy(&fs->fs_old_postbl_start, ump->um_oldfscompat, 512);
1748 extrasave = ump->um_oldfscompat;
1749 extrasave += 512/sizeof(int32_t);
1750 fs->fs_old_npsect = extrasave[0];
1751 fs->fs_old_interleave = extrasave[1];
1752 fs->fs_old_trackskew = extrasave[2];
1753
1754 }
1755
1756 /*
1757 * unmount vfs operation
1758 */
1759 int
ffs_unmount(struct mount * mp,int mntflags)1760 ffs_unmount(struct mount *mp, int mntflags)
1761 {
1762 struct lwp *l = curlwp;
1763 struct ufsmount *ump = VFSTOUFS(mp);
1764 struct fs *fs = ump->um_fs;
1765 int error, flags;
1766 u_int32_t bsize;
1767 #ifdef WAPBL
1768 extern int doforce;
1769 #endif
1770
1771 if (ump->um_discarddata) {
1772 ffs_discard_finish(ump->um_discarddata, mntflags);
1773 ump->um_discarddata = NULL;
1774 }
1775
1776 flags = 0;
1777 if (mntflags & MNT_FORCE)
1778 flags |= FORCECLOSE;
1779 if ((error = ffs_flushfiles(mp, flags, l)) != 0)
1780 return (error);
1781 error = UFS_WAPBL_BEGIN(mp);
1782 if (error == 0)
1783 if (fs->fs_ronly == 0 &&
1784 ffs_cgupdate(ump, MNT_WAIT) == 0 &&
1785 fs->fs_clean & FS_WASCLEAN) {
1786 fs->fs_clean = FS_ISCLEAN;
1787 fs->fs_fmod = 0;
1788 (void) ffs_sbupdate(ump, MNT_WAIT);
1789 }
1790 if (error == 0)
1791 UFS_WAPBL_END(mp);
1792 #ifdef WAPBL
1793 KASSERT(!(mp->mnt_wapbl_replay && mp->mnt_wapbl));
1794 if (mp->mnt_wapbl_replay) {
1795 KDASSERT(fs->fs_ronly);
1796 wapbl_replay_stop(mp->mnt_wapbl_replay);
1797 wapbl_replay_free(mp->mnt_wapbl_replay);
1798 mp->mnt_wapbl_replay = 0;
1799 }
1800 error = ffs_wapbl_stop(mp, doforce && (mntflags & MNT_FORCE));
1801 if (error) {
1802 return error;
1803 }
1804 #endif /* WAPBL */
1805
1806 if (ump->um_devvp->v_type != VBAD)
1807 spec_node_setmountedfs(ump->um_devvp, NULL);
1808 vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY);
1809 (void)VOP_CLOSE(ump->um_devvp, fs->fs_ronly ? FREAD : FREAD | FWRITE,
1810 NOCRED);
1811 vput(ump->um_devvp);
1812
1813 bsize = fs->fs_cssize;
1814 if (fs->fs_contigsumsize > 0)
1815 bsize += fs->fs_ncg * sizeof(int32_t);
1816 bsize += fs->fs_ncg * sizeof(*fs->fs_contigdirs);
1817 kmem_free(fs->fs_csp, bsize);
1818
1819 kmem_free(fs, fs->fs_sbsize);
1820 if (ump->um_oldfscompat != NULL)
1821 kmem_free(ump->um_oldfscompat, 512 + 3*sizeof(int32_t));
1822 mutex_destroy(&ump->um_lock);
1823 ffs_snapshot_fini(ump);
1824 kmem_free(ump, sizeof(*ump));
1825 mp->mnt_data = NULL;
1826 mp->mnt_flag &= ~MNT_LOCAL;
1827 return (0);
1828 }
1829
1830 /*
1831 * Flush out all the files in a filesystem.
1832 */
1833 int
ffs_flushfiles(struct mount * mp,int flags,struct lwp * l)1834 ffs_flushfiles(struct mount *mp, int flags, struct lwp *l)
1835 {
1836 extern int doforce;
1837 struct ufsmount *ump;
1838 int error;
1839
1840 if (!doforce)
1841 flags &= ~FORCECLOSE;
1842 ump = VFSTOUFS(mp);
1843 #ifdef QUOTA
1844 if ((error = quota1_umount(mp, flags)) != 0)
1845 return (error);
1846 #endif
1847 #ifdef QUOTA2
1848 if ((error = quota2_umount(mp, flags)) != 0)
1849 return (error);
1850 #endif
1851 #ifdef UFS_EXTATTR
1852 if (ump->um_fstype == UFS1) {
1853 if (ump->um_extattr.uepm_flags & UFS_EXTATTR_UEPM_STARTED)
1854 ufs_extattr_stop(mp, l);
1855 if (ump->um_extattr.uepm_flags & UFS_EXTATTR_UEPM_INITIALIZED)
1856 ufs_extattr_uepm_destroy(&ump->um_extattr);
1857 mp->mnt_flag &= ~MNT_EXTATTR;
1858 }
1859 #endif
1860 if ((error = vflush(mp, 0, SKIPSYSTEM | flags)) != 0)
1861 return (error);
1862 ffs_snapshot_unmount(mp);
1863 /*
1864 * Flush all the files.
1865 */
1866 error = vflush(mp, NULLVP, flags);
1867 if (error)
1868 return (error);
1869 /*
1870 * Flush filesystem metadata.
1871 */
1872 vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY);
1873 error = VOP_FSYNC(ump->um_devvp, l->l_cred, FSYNC_WAIT, 0, 0);
1874 VOP_UNLOCK(ump->um_devvp);
1875 if (flags & FORCECLOSE) /* XXXDBJ */
1876 error = 0;
1877
1878 #ifdef WAPBL
1879 if (error)
1880 return error;
1881 if (mp->mnt_wapbl) {
1882 error = wapbl_flush(mp->mnt_wapbl, 1);
1883 if (flags & FORCECLOSE)
1884 error = 0;
1885 }
1886 #endif
1887
1888 return (error);
1889 }
1890
1891 /*
1892 * Get file system statistics.
1893 */
1894 int
ffs_statvfs(struct mount * mp,struct statvfs * sbp)1895 ffs_statvfs(struct mount *mp, struct statvfs *sbp)
1896 {
1897 struct ufsmount *ump;
1898 struct fs *fs;
1899
1900 ump = VFSTOUFS(mp);
1901 fs = ump->um_fs;
1902 mutex_enter(&ump->um_lock);
1903 sbp->f_bsize = fs->fs_bsize;
1904 sbp->f_frsize = fs->fs_fsize;
1905 sbp->f_iosize = fs->fs_bsize;
1906 sbp->f_blocks = fs->fs_dsize;
1907 sbp->f_bfree = ffs_blkstofrags(fs, fs->fs_cstotal.cs_nbfree) +
1908 fs->fs_cstotal.cs_nffree + FFS_DBTOFSB(fs, fs->fs_pendingblocks);
1909 sbp->f_bresvd = ((u_int64_t) fs->fs_dsize * (u_int64_t)
1910 fs->fs_minfree) / (u_int64_t) 100;
1911 if (sbp->f_bfree > sbp->f_bresvd)
1912 sbp->f_bavail = sbp->f_bfree - sbp->f_bresvd;
1913 else
1914 sbp->f_bavail = 0;
1915 sbp->f_files = fs->fs_ncg * fs->fs_ipg - UFS_ROOTINO;
1916 sbp->f_ffree = fs->fs_cstotal.cs_nifree + fs->fs_pendinginodes;
1917 sbp->f_favail = sbp->f_ffree;
1918 sbp->f_fresvd = 0;
1919 mutex_exit(&ump->um_lock);
1920 copy_statvfs_info(sbp, mp);
1921
1922 return (0);
1923 }
1924
1925 struct ffs_sync_ctx {
1926 int waitfor;
1927 };
1928
1929 static bool
ffs_sync_selector(void * cl,struct vnode * vp)1930 ffs_sync_selector(void *cl, struct vnode *vp)
1931 {
1932 struct ffs_sync_ctx *c = cl;
1933 struct inode *ip;
1934
1935 KASSERT(mutex_owned(vp->v_interlock));
1936
1937 ip = VTOI(vp);
1938 /*
1939 * Skip the vnode/inode if inaccessible.
1940 */
1941 if (ip == NULL || vp->v_type == VNON)
1942 return false;
1943
1944 /*
1945 * We deliberately update inode times here. This will
1946 * prevent a massive queue of updates accumulating, only
1947 * to be handled by a call to unmount.
1948 *
1949 * XXX It would be better to have the syncer trickle these
1950 * out. Adjustment needed to allow registering vnodes for
1951 * sync when the vnode is clean, but the inode dirty. Or
1952 * have ufs itself trickle out inode updates.
1953 *
1954 * If doing a lazy sync, we don't care about metadata or
1955 * data updates, because they are handled by each vnode's
1956 * synclist entry. In this case we are only interested in
1957 * writing back modified inodes.
1958 */
1959 if ((ip->i_flag & (IN_ACCESS | IN_CHANGE | IN_UPDATE |
1960 IN_MODIFY | IN_MODIFIED | IN_ACCESSED)) == 0 &&
1961 (c->waitfor == MNT_LAZY || (LIST_EMPTY(&vp->v_dirtyblkhd) &&
1962 (vp->v_iflag & VI_ONWORKLST) == 0)))
1963 return false;
1964
1965 return true;
1966 }
1967
1968 /*
1969 * Go through the disk queues to initiate sandbagged IO;
1970 * go through the inodes to write those that have been modified;
1971 * initiate the writing of the super block if it has been modified.
1972 *
1973 * Note: we are always called with the filesystem marked `MPBUSY'.
1974 */
1975 int
ffs_sync(struct mount * mp,int waitfor,kauth_cred_t cred)1976 ffs_sync(struct mount *mp, int waitfor, kauth_cred_t cred)
1977 {
1978 struct vnode *vp;
1979 struct ufsmount *ump = VFSTOUFS(mp);
1980 struct fs *fs;
1981 struct vnode_iterator *marker;
1982 int error, allerror = 0;
1983 struct ffs_sync_ctx ctx;
1984
1985 fs = ump->um_fs;
1986 if (fs->fs_fmod != 0 && fs->fs_ronly != 0) { /* XXX */
1987 panic("%s: rofs mod, fs=%s", __func__, fs->fs_fsmnt);
1988 }
1989
1990 /*
1991 * Write back each (modified) inode.
1992 */
1993 vfs_vnode_iterator_init(mp, &marker);
1994
1995 ctx.waitfor = waitfor;
1996 while ((vp = vfs_vnode_iterator_next(marker, ffs_sync_selector, &ctx)))
1997 {
1998 error = vn_lock(vp,
1999 LK_EXCLUSIVE | (waitfor == MNT_LAZY ? LK_NOWAIT : 0));
2000 if (error) {
2001 vrele(vp);
2002 continue;
2003 }
2004 if (waitfor == MNT_LAZY) {
2005 error = UFS_WAPBL_BEGIN(vp->v_mount);
2006 if (!error) {
2007 error = ffs_update(vp, NULL, NULL,
2008 UPDATE_CLOSE);
2009 UFS_WAPBL_END(vp->v_mount);
2010 }
2011 } else {
2012 error = VOP_FSYNC(vp, cred, FSYNC_NOLOG |
2013 (waitfor == MNT_WAIT ? FSYNC_WAIT : 0), 0, 0);
2014 }
2015 if (error)
2016 allerror = error;
2017 vput(vp);
2018 }
2019 vfs_vnode_iterator_destroy(marker);
2020
2021 /*
2022 * Force stale file system control information to be flushed.
2023 */
2024 if (waitfor != MNT_LAZY && (ump->um_devvp->v_numoutput > 0 ||
2025 !LIST_EMPTY(&ump->um_devvp->v_dirtyblkhd))) {
2026 vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY);
2027 if ((error = VOP_FSYNC(ump->um_devvp, cred,
2028 (waitfor == MNT_WAIT ? FSYNC_WAIT : 0) | FSYNC_NOLOG,
2029 0, 0)) != 0)
2030 allerror = error;
2031 VOP_UNLOCK(ump->um_devvp);
2032 }
2033 #if defined(QUOTA) || defined(QUOTA2)
2034 qsync(mp);
2035 #endif
2036 /*
2037 * Write back modified superblock.
2038 */
2039 if (fs->fs_fmod != 0) {
2040 fs->fs_fmod = 0;
2041 fs->fs_time = time_second;
2042 error = UFS_WAPBL_BEGIN(mp);
2043 if (error)
2044 allerror = error;
2045 else {
2046 if ((error = ffs_cgupdate(ump, waitfor)))
2047 allerror = error;
2048 UFS_WAPBL_END(mp);
2049 }
2050 }
2051
2052 #ifdef WAPBL
2053 if (mp->mnt_wapbl) {
2054 error = wapbl_flush(mp->mnt_wapbl, (waitfor == MNT_WAIT));
2055 if (error)
2056 allerror = error;
2057 }
2058 #endif
2059
2060 return (allerror);
2061 }
2062
2063 /*
2064 * Load inode from disk and initialize vnode.
2065 */
2066 static int
ffs_init_vnode(struct ufsmount * ump,struct vnode * vp,ino_t ino)2067 ffs_init_vnode(struct ufsmount *ump, struct vnode *vp, ino_t ino)
2068 {
2069 struct fs *fs;
2070 struct inode *ip;
2071 struct buf *bp;
2072 int error;
2073
2074 fs = ump->um_fs;
2075
2076 /* Read in the disk contents for the inode. */
2077 error = bread(ump->um_devvp, FFS_FSBTODB(fs, ino_to_fsba(fs, ino)),
2078 (int)fs->fs_bsize, 0, &bp);
2079 if (error)
2080 return error;
2081
2082 /* Allocate and initialize inode. */
2083 ip = pool_cache_get(ffs_inode_cache, PR_WAITOK);
2084 memset(ip, 0, sizeof(struct inode));
2085 ip->i_ump = ump;
2086 ip->i_fs = fs;
2087 ip->i_dev = ump->um_dev;
2088 ip->i_number = ino;
2089 if (ump->um_fstype == UFS1)
2090 ip->i_din.ffs1_din = pool_cache_get(ffs_dinode1_cache,
2091 PR_WAITOK);
2092 else
2093 ip->i_din.ffs2_din = pool_cache_get(ffs_dinode2_cache,
2094 PR_WAITOK);
2095 ffs_load_inode(bp, ip, fs, ino);
2096 brelse(bp, 0);
2097 ip->i_vnode = vp;
2098 #if defined(QUOTA) || defined(QUOTA2)
2099 ufsquota_init(ip);
2100 #endif
2101
2102 /* Initialise vnode with this inode. */
2103 vp->v_tag = VT_UFS;
2104 vp->v_op = ffs_vnodeop_p;
2105 vp->v_data = ip;
2106
2107 /* Initialize genfs node. */
2108 genfs_node_init(vp, &ffs_genfsops);
2109
2110 return 0;
2111 }
2112
2113 /*
2114 * Undo ffs_init_vnode().
2115 */
2116 static void
ffs_deinit_vnode(struct ufsmount * ump,struct vnode * vp)2117 ffs_deinit_vnode(struct ufsmount *ump, struct vnode *vp)
2118 {
2119 struct inode *ip = VTOI(vp);
2120
2121 genfs_node_destroy(vp);
2122 vp->v_data = NULL;
2123
2124 if (ump->um_fstype == UFS1)
2125 pool_cache_put(ffs_dinode1_cache, ip->i_din.ffs1_din);
2126 else
2127 pool_cache_put(ffs_dinode2_cache, ip->i_din.ffs2_din);
2128 pool_cache_put(ffs_inode_cache, ip);
2129 }
2130
2131 /*
2132 * Read an inode from disk and initialize this vnode / inode pair.
2133 * Caller assures no other thread will try to load this inode.
2134 */
2135 int
ffs_loadvnode(struct mount * mp,struct vnode * vp,const void * key,size_t key_len,const void ** new_key)2136 ffs_loadvnode(struct mount *mp, struct vnode *vp,
2137 const void *key, size_t key_len, const void **new_key)
2138 {
2139 ino_t ino;
2140 struct fs *fs;
2141 struct inode *ip;
2142 struct ufsmount *ump;
2143 int error;
2144
2145 KASSERT(key_len == sizeof(ino));
2146 memcpy(&ino, key, key_len);
2147 ump = VFSTOUFS(mp);
2148 fs = ump->um_fs;
2149
2150 error = ffs_init_vnode(ump, vp, ino);
2151 if (error)
2152 return error;
2153
2154 ip = VTOI(vp);
2155 if (ip->i_mode == 0) {
2156 ffs_deinit_vnode(ump, vp);
2157
2158 return ENOENT;
2159 }
2160
2161 /* Initialize the vnode from the inode. */
2162 ufs_vinit(mp, ffs_specop_p, ffs_fifoop_p, &vp);
2163
2164 /* Finish inode initialization. */
2165 ip->i_devvp = ump->um_devvp;
2166 vref(ip->i_devvp);
2167
2168 /*
2169 * Ensure that uid and gid are correct. This is a temporary
2170 * fix until fsck has been changed to do the update.
2171 */
2172
2173 if (fs->fs_magic == FS_UFS1_MAGIC && /* XXX */
2174 fs->fs_old_inodefmt < FS_44INODEFMT) { /* XXX */
2175 ip->i_uid = ip->i_ffs1_ouid; /* XXX */
2176 ip->i_gid = ip->i_ffs1_ogid; /* XXX */
2177 } /* XXX */
2178 uvm_vnp_setsize(vp, ip->i_size);
2179 cache_enter_id(vp, ip->i_mode, ip->i_uid, ip->i_gid, !HAS_ACLS(ip));
2180 *new_key = &ip->i_number;
2181 return 0;
2182 }
2183
2184 /*
2185 * Create a new inode on disk and initialize this vnode / inode pair.
2186 */
2187 int
ffs_newvnode(struct mount * mp,struct vnode * dvp,struct vnode * vp,struct vattr * vap,kauth_cred_t cred,void * extra,size_t * key_len,const void ** new_key)2188 ffs_newvnode(struct mount *mp, struct vnode *dvp, struct vnode *vp,
2189 struct vattr *vap, kauth_cred_t cred, void *extra,
2190 size_t *key_len, const void **new_key)
2191 {
2192 ino_t ino;
2193 struct fs *fs;
2194 struct inode *ip;
2195 struct timespec ts;
2196 struct ufsmount *ump;
2197 int error, mode;
2198
2199 KASSERT(dvp->v_mount == mp);
2200 KASSERT(vap->va_type != VNON);
2201
2202 *key_len = sizeof(ino);
2203 ump = VFSTOUFS(mp);
2204 fs = ump->um_fs;
2205 mode = MAKEIMODE(vap->va_type, vap->va_mode);
2206
2207 /* Allocate fresh inode. */
2208 error = ffs_valloc(dvp, mode, cred, &ino);
2209 if (error)
2210 return error;
2211
2212 /* Attach inode to vnode. */
2213 error = ffs_init_vnode(ump, vp, ino);
2214 if (error) {
2215 if (UFS_WAPBL_BEGIN(mp) == 0) {
2216 ffs_vfree(dvp, ino, mode);
2217 UFS_WAPBL_END(mp);
2218 }
2219 return error;
2220 }
2221
2222 ip = VTOI(vp);
2223 if (ip->i_mode) {
2224 panic("%s: dup alloc ino=%" PRId64 " on %s: mode %o/%o "
2225 "gen %x/%x size %" PRIx64 " blocks %" PRIx64,
2226 __func__, ino, fs->fs_fsmnt, DIP(ip, mode), ip->i_mode,
2227 DIP(ip, gen), ip->i_gen, DIP(ip, size), DIP(ip, blocks));
2228 }
2229 if (DIP(ip, size) || DIP(ip, blocks)) {
2230 printf("%s: ino=%" PRId64 " on %s: "
2231 "gen %x/%x has non zero blocks %" PRIx64 " or size %"
2232 PRIx64 "\n",
2233 __func__, ino, fs->fs_fsmnt, DIP(ip, gen), ip->i_gen,
2234 DIP(ip, blocks), DIP(ip, size));
2235 if ((ip)->i_ump->um_fstype == UFS1)
2236 panic("%s: dirty filesystem?", __func__);
2237 DIP_ASSIGN(ip, blocks, 0);
2238 DIP_ASSIGN(ip, size, 0);
2239 }
2240
2241 /* Set uid / gid. */
2242 if (cred == NOCRED || cred == FSCRED) {
2243 ip->i_gid = 0;
2244 ip->i_uid = 0;
2245 } else {
2246 ip->i_gid = VTOI(dvp)->i_gid;
2247 ip->i_uid = kauth_cred_geteuid(cred);
2248 }
2249 DIP_ASSIGN(ip, gid, ip->i_gid);
2250 DIP_ASSIGN(ip, uid, ip->i_uid);
2251
2252 #if defined(QUOTA) || defined(QUOTA2)
2253 error = UFS_WAPBL_BEGIN(mp);
2254 if (error) {
2255 ffs_deinit_vnode(ump, vp);
2256
2257 return error;
2258 }
2259 error = chkiq(ip, 1, cred, 0);
2260 if (error) {
2261 ffs_vfree(dvp, ino, mode);
2262 UFS_WAPBL_END(mp);
2263 ffs_deinit_vnode(ump, vp);
2264
2265 return error;
2266 }
2267 UFS_WAPBL_END(mp);
2268 #endif
2269
2270 /* Set type and finalize. */
2271 ip->i_flags = 0;
2272 DIP_ASSIGN(ip, flags, 0);
2273 ip->i_mode = mode;
2274 DIP_ASSIGN(ip, mode, mode);
2275 if (vap->va_rdev != VNOVAL) {
2276 /*
2277 * Want to be able to use this to make badblock
2278 * inodes, so don't truncate the dev number.
2279 */
2280 if (ump->um_fstype == UFS1)
2281 ip->i_ffs1_rdev = ufs_rw32(vap->va_rdev,
2282 UFS_MPNEEDSWAP(ump));
2283 else
2284 ip->i_ffs2_rdev = ufs_rw64(vap->va_rdev,
2285 UFS_MPNEEDSWAP(ump));
2286 }
2287 ufs_vinit(mp, ffs_specop_p, ffs_fifoop_p, &vp);
2288 ip->i_devvp = ump->um_devvp;
2289 vref(ip->i_devvp);
2290
2291 /* Set up a new generation number for this inode. */
2292 ip->i_gen++;
2293 DIP_ASSIGN(ip, gen, ip->i_gen);
2294 if (fs->fs_magic == FS_UFS2_MAGIC) {
2295 vfs_timestamp(&ts);
2296 ip->i_ffs2_birthtime = ts.tv_sec;
2297 ip->i_ffs2_birthnsec = ts.tv_nsec;
2298 }
2299
2300 uvm_vnp_setsize(vp, ip->i_size);
2301 cache_enter_id(vp, ip->i_mode, ip->i_uid, ip->i_gid, !HAS_ACLS(ip));
2302 *new_key = &ip->i_number;
2303 return 0;
2304 }
2305
2306 /*
2307 * File handle to vnode
2308 *
2309 * Have to be really careful about stale file handles:
2310 * - check that the inode number is valid
2311 * - call ffs_vget() to get the locked inode
2312 * - check for an unallocated inode (i_mode == 0)
2313 * - check that the given client host has export rights and return
2314 * those rights via. exflagsp and credanonp
2315 */
2316 int
ffs_fhtovp(struct mount * mp,struct fid * fhp,int lktype,struct vnode ** vpp)2317 ffs_fhtovp(struct mount *mp, struct fid *fhp, int lktype, struct vnode **vpp)
2318 {
2319 struct ufid ufh;
2320 int error;
2321
2322 if (fhp->fid_len != sizeof(struct ufid))
2323 return EINVAL;
2324
2325 memcpy(&ufh, fhp, sizeof(ufh));
2326 if ((error = ffs_checkrange(mp, ufh.ufid_ino)) != 0)
2327 return error;
2328
2329 return (ufs_fhtovp(mp, &ufh, lktype, vpp));
2330 }
2331
2332 /*
2333 * Vnode pointer to File handle
2334 */
2335 /* ARGSUSED */
2336 int
ffs_vptofh(struct vnode * vp,struct fid * fhp,size_t * fh_size)2337 ffs_vptofh(struct vnode *vp, struct fid *fhp, size_t *fh_size)
2338 {
2339 struct inode *ip;
2340 struct ufid ufh;
2341
2342 if (*fh_size < sizeof(struct ufid)) {
2343 *fh_size = sizeof(struct ufid);
2344 return E2BIG;
2345 }
2346 ip = VTOI(vp);
2347 *fh_size = sizeof(struct ufid);
2348 memset(&ufh, 0, sizeof(ufh));
2349 ufh.ufid_len = sizeof(struct ufid);
2350 ufh.ufid_ino = ip->i_number;
2351 ufh.ufid_gen = ip->i_gen;
2352 memcpy(fhp, &ufh, sizeof(ufh));
2353 return (0);
2354 }
2355
2356 void
ffs_init(void)2357 ffs_init(void)
2358 {
2359 if (ffs_initcount++ > 0)
2360 return;
2361
2362 ffs_inode_cache = pool_cache_init(sizeof(struct inode), 0, 0, 0,
2363 "ffsino", NULL, IPL_NONE, NULL, NULL, NULL);
2364 ffs_dinode1_cache = pool_cache_init(sizeof(struct ufs1_dinode), 0, 0, 0,
2365 "ffsdino1", NULL, IPL_NONE, NULL, NULL, NULL);
2366 ffs_dinode2_cache = pool_cache_init(sizeof(struct ufs2_dinode), 0, 0, 0,
2367 "ffsdino2", NULL, IPL_NONE, NULL, NULL, NULL);
2368 ufs_init();
2369 }
2370
2371 void
ffs_reinit(void)2372 ffs_reinit(void)
2373 {
2374 ufs_reinit();
2375 }
2376
2377 void
ffs_done(void)2378 ffs_done(void)
2379 {
2380 if (--ffs_initcount > 0)
2381 return;
2382
2383 ufs_done();
2384 pool_cache_destroy(ffs_dinode2_cache);
2385 pool_cache_destroy(ffs_dinode1_cache);
2386 pool_cache_destroy(ffs_inode_cache);
2387 }
2388
2389 /*
2390 * Write a superblock and associated information back to disk.
2391 */
2392 int
ffs_sbupdate(struct ufsmount * mp,int waitfor)2393 ffs_sbupdate(struct ufsmount *mp, int waitfor)
2394 {
2395 struct fs *fs = mp->um_fs;
2396 struct buf *bp;
2397 int error;
2398 u_int32_t saveflag;
2399
2400 error = ffs_getblk(mp->um_devvp,
2401 fs->fs_sblockloc / DEV_BSIZE, FFS_NOBLK,
2402 fs->fs_sbsize, false, &bp);
2403 if (error)
2404 return error;
2405 saveflag = fs->fs_flags & FS_INTERNAL;
2406 fs->fs_flags &= ~FS_INTERNAL;
2407
2408 memcpy(bp->b_data, fs, fs->fs_sbsize);
2409
2410 ffs_oldfscompat_write((struct fs *)bp->b_data, mp);
2411 if (mp->um_flags & UFS_EA) {
2412 struct fs *bfs = (struct fs *)bp->b_data;
2413 KASSERT(bfs->fs_magic == FS_UFS2_MAGIC);
2414 bfs->fs_magic = FS_UFS2EA_MAGIC;
2415 }
2416 #ifdef FFS_EI
2417 if (mp->um_flags & UFS_NEEDSWAP)
2418 ffs_sb_swap((struct fs *)bp->b_data, (struct fs *)bp->b_data);
2419 #endif
2420 fs->fs_flags |= saveflag;
2421
2422 if (waitfor == MNT_WAIT)
2423 error = bwrite(bp);
2424 else
2425 bawrite(bp);
2426 return (error);
2427 }
2428
2429 int
ffs_cgupdate(struct ufsmount * mp,int waitfor)2430 ffs_cgupdate(struct ufsmount *mp, int waitfor)
2431 {
2432 struct fs *fs = mp->um_fs;
2433 struct buf *bp;
2434 int blks;
2435 void *space;
2436 int i, size, error = 0, allerror = 0;
2437
2438 UFS_WAPBL_JLOCK_ASSERT(mp->um_mountp);
2439
2440 allerror = ffs_sbupdate(mp, waitfor);
2441 blks = howmany(fs->fs_cssize, fs->fs_fsize);
2442 space = fs->fs_csp;
2443 for (i = 0; i < blks; i += fs->fs_frag) {
2444 size = fs->fs_bsize;
2445 if (i + fs->fs_frag > blks)
2446 size = (blks - i) * fs->fs_fsize;
2447 error = ffs_getblk(mp->um_devvp, FFS_FSBTODB(fs, fs->fs_csaddr + i),
2448 FFS_NOBLK, size, false, &bp);
2449 if (error)
2450 break;
2451 #ifdef FFS_EI
2452 if (mp->um_flags & UFS_NEEDSWAP)
2453 ffs_csum_swap((struct csum*)space,
2454 (struct csum*)bp->b_data, size);
2455 else
2456 #endif
2457 memcpy(bp->b_data, space, (u_int)size);
2458 space = (char *)space + size;
2459 if (waitfor == MNT_WAIT)
2460 error = bwrite(bp);
2461 else
2462 bawrite(bp);
2463 }
2464 if (!allerror && error)
2465 allerror = error;
2466 return (allerror);
2467 }
2468
2469 int
ffs_extattrctl(struct mount * mp,int cmd,struct vnode * vp,int attrnamespace,const char * attrname)2470 ffs_extattrctl(struct mount *mp, int cmd, struct vnode *vp,
2471 int attrnamespace, const char *attrname)
2472 {
2473 #ifdef UFS_EXTATTR
2474 /*
2475 * File-backed extended attributes are only supported on UFS1.
2476 * UFS2 has native extended attributes.
2477 */
2478 if (VFSTOUFS(mp)->um_fstype == UFS1)
2479 return (ufs_extattrctl(mp, cmd, vp, attrnamespace, attrname));
2480 #endif
2481 return (vfs_stdextattrctl(mp, cmd, vp, attrnamespace, attrname));
2482 }
2483
2484 /*
2485 * Synch vnode for a mounted file system.
2486 */
2487 static int
ffs_vfs_fsync(vnode_t * vp,int flags)2488 ffs_vfs_fsync(vnode_t *vp, int flags)
2489 {
2490 int error, i, pflags;
2491 #ifdef WAPBL
2492 struct mount *mp;
2493 #endif
2494
2495 KASSERT(vp->v_type == VBLK);
2496 KASSERT(spec_node_getmountedfs(vp) != NULL);
2497
2498 /*
2499 * Flush all dirty data associated with the vnode.
2500 */
2501 pflags = PGO_ALLPAGES | PGO_CLEANIT;
2502 if ((flags & FSYNC_WAIT) != 0)
2503 pflags |= PGO_SYNCIO;
2504 rw_enter(vp->v_uobj.vmobjlock, RW_WRITER);
2505 error = VOP_PUTPAGES(vp, 0, 0, pflags);
2506 if (error)
2507 return error;
2508
2509 #ifdef WAPBL
2510 mp = spec_node_getmountedfs(vp);
2511 if (mp && mp->mnt_wapbl) {
2512 /*
2513 * Don't bother writing out metadata if the syncer is
2514 * making the request. We will let the sync vnode
2515 * write it out in a single burst through a call to
2516 * VFS_SYNC().
2517 */
2518 if ((flags & (FSYNC_DATAONLY | FSYNC_LAZY | FSYNC_NOLOG)) != 0)
2519 return 0;
2520
2521 /*
2522 * Don't flush the log if the vnode being flushed
2523 * contains no dirty buffers that could be in the log.
2524 */
2525 if (!LIST_EMPTY(&vp->v_dirtyblkhd)) {
2526 error = wapbl_flush(mp->mnt_wapbl, 0);
2527 if (error)
2528 return error;
2529 }
2530
2531 if ((flags & FSYNC_WAIT) != 0) {
2532 mutex_enter(vp->v_interlock);
2533 while (vp->v_numoutput)
2534 cv_wait(&vp->v_cv, vp->v_interlock);
2535 mutex_exit(vp->v_interlock);
2536 }
2537
2538 return 0;
2539 }
2540 #endif /* WAPBL */
2541
2542 error = vflushbuf(vp, flags);
2543 if (error == 0 && (flags & FSYNC_CACHE) != 0) {
2544 i = 1;
2545 (void)VOP_IOCTL(vp, DIOCCACHESYNC, &i, FWRITE,
2546 kauth_cred_get());
2547 }
2548
2549 return error;
2550 }
2551