1 /*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 1989, 1991, 1993, 1994
5 * The Regents of the University of California. All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32 #include <sys/cdefs.h>
33 #include "opt_quota.h"
34 #include "opt_ufs.h"
35 #include "opt_ffs.h"
36 #include "opt_ddb.h"
37
38 #include <sys/param.h>
39 #include <sys/gsb_crc32.h>
40 #include <sys/systm.h>
41 #include <sys/namei.h>
42 #include <sys/priv.h>
43 #include <sys/proc.h>
44 #include <sys/taskqueue.h>
45 #include <sys/kernel.h>
46 #include <sys/ktr.h>
47 #include <sys/vnode.h>
48 #include <sys/mount.h>
49 #include <sys/bio.h>
50 #include <sys/buf.h>
51 #include <sys/conf.h>
52 #include <sys/fcntl.h>
53 #include <sys/ioccom.h>
54 #include <sys/malloc.h>
55 #include <sys/mutex.h>
56 #include <sys/rwlock.h>
57 #include <sys/sysctl.h>
58 #include <sys/vmmeter.h>
59
60 #include <security/mac/mac_framework.h>
61
62 #include <ufs/ufs/dir.h>
63 #include <ufs/ufs/extattr.h>
64 #include <ufs/ufs/gjournal.h>
65 #include <ufs/ufs/quota.h>
66 #include <ufs/ufs/ufsmount.h>
67 #include <ufs/ufs/inode.h>
68 #include <ufs/ufs/ufs_extern.h>
69
70 #include <ufs/ffs/fs.h>
71 #include <ufs/ffs/ffs_extern.h>
72
73 #include <vm/vm.h>
74 #include <vm/uma.h>
75 #include <vm/vm_page.h>
76
77 #include <geom/geom.h>
78 #include <geom/geom_vfs.h>
79
80 #include <ddb/ddb.h>
81
82 static uma_zone_t uma_inode, uma_ufs1, uma_ufs2;
83 VFS_SMR_DECLARE;
84
85 static int ffs_mountfs(struct vnode *, struct mount *, struct thread *);
86 static void ffs_ifree(struct ufsmount *ump, struct inode *ip);
87 static int ffs_sync_lazy(struct mount *mp);
88 static int ffs_use_bread(void *devfd, off_t loc, void **bufp, int size);
89 static int ffs_use_bwrite(void *devfd, off_t loc, void *buf, int size);
90
91 static vfs_init_t ffs_init;
92 static vfs_uninit_t ffs_uninit;
93 static vfs_extattrctl_t ffs_extattrctl;
94 static vfs_cmount_t ffs_cmount;
95 static vfs_unmount_t ffs_unmount;
96 static vfs_mount_t ffs_mount;
97 static vfs_statfs_t ffs_statfs;
98 static vfs_fhtovp_t ffs_fhtovp;
99 static vfs_sync_t ffs_sync;
100
101 static struct vfsops ufs_vfsops = {
102 .vfs_extattrctl = ffs_extattrctl,
103 .vfs_fhtovp = ffs_fhtovp,
104 .vfs_init = ffs_init,
105 .vfs_mount = ffs_mount,
106 .vfs_cmount = ffs_cmount,
107 .vfs_quotactl = ufs_quotactl,
108 .vfs_root = vfs_cache_root,
109 .vfs_cachedroot = ufs_root,
110 .vfs_statfs = ffs_statfs,
111 .vfs_sync = ffs_sync,
112 .vfs_uninit = ffs_uninit,
113 .vfs_unmount = ffs_unmount,
114 .vfs_vget = ffs_vget,
115 .vfs_susp_clean = process_deferred_inactive,
116 };
117
118 VFS_SET(ufs_vfsops, ufs, VFCF_FILEREVINC);
119 MODULE_VERSION(ufs, 1);
120
121 static b_strategy_t ffs_geom_strategy;
122 static b_write_t ffs_bufwrite;
123
124 static struct buf_ops ffs_ops = {
125 .bop_name = "FFS",
126 .bop_write = ffs_bufwrite,
127 .bop_strategy = ffs_geom_strategy,
128 .bop_sync = bufsync,
129 #ifdef NO_FFS_SNAPSHOT
130 .bop_bdflush = bufbdflush,
131 #else
132 .bop_bdflush = ffs_bdflush,
133 #endif
134 };
135
136 /*
137 * Note that userquota and groupquota options are not currently used
138 * by UFS/FFS code and generally mount(8) does not pass those options
139 * from userland, but they can be passed by loader(8) via
140 * vfs.root.mountfrom.options.
141 */
142 static const char *ffs_opts[] = { "acls", "async", "noatime", "noclusterr",
143 "noclusterw", "noexec", "export", "force", "from", "groupquota",
144 "multilabel", "nfsv4acls", "snapshot", "nosuid", "suiddir",
145 "nosymfollow", "sync", "union", "userquota", "untrusted", NULL };
146
147 static int ffs_enxio_enable = 1;
148 SYSCTL_DECL(_vfs_ffs);
149 SYSCTL_INT(_vfs_ffs, OID_AUTO, enxio_enable, CTLFLAG_RWTUN,
150 &ffs_enxio_enable, 0,
151 "enable mapping of other disk I/O errors to ENXIO");
152
153 /*
154 * Return buffer with the contents of block "offset" from the beginning of
155 * directory "ip". If "res" is non-zero, fill it in with a pointer to the
156 * remaining space in the directory.
157 */
158 static int
ffs_blkatoff(struct vnode * vp,off_t offset,char ** res,struct buf ** bpp)159 ffs_blkatoff(struct vnode *vp, off_t offset, char **res, struct buf **bpp)
160 {
161 struct inode *ip;
162 struct fs *fs;
163 struct buf *bp;
164 ufs_lbn_t lbn;
165 int bsize, error;
166
167 ip = VTOI(vp);
168 fs = ITOFS(ip);
169 lbn = lblkno(fs, offset);
170 bsize = blksize(fs, ip, lbn);
171
172 *bpp = NULL;
173 error = bread(vp, lbn, bsize, NOCRED, &bp);
174 if (error) {
175 return (error);
176 }
177 if (res)
178 *res = (char *)bp->b_data + blkoff(fs, offset);
179 *bpp = bp;
180 return (0);
181 }
182
183 /*
184 * Load up the contents of an inode and copy the appropriate pieces
185 * to the incore copy.
186 */
187 static int
ffs_load_inode(struct buf * bp,struct inode * ip,struct fs * fs,ino_t ino)188 ffs_load_inode(struct buf *bp, struct inode *ip, struct fs *fs, ino_t ino)
189 {
190 struct ufs1_dinode *dip1;
191 struct ufs2_dinode *dip2;
192 time_t now;
193 int error;
194
195 now = time_second > fs->fs_time ? time_second : fs->fs_time;
196 if (I_IS_UFS1(ip)) {
197 dip1 = ip->i_din1;
198 *dip1 =
199 *((struct ufs1_dinode *)bp->b_data + ino_to_fsbo(fs, ino));
200 ip->i_mode = dip1->di_mode;
201 ip->i_nlink = dip1->di_nlink;
202 ip->i_effnlink = dip1->di_nlink;
203 ip->i_size = dip1->di_size;
204 ip->i_flags = dip1->di_flags;
205 ip->i_gen = dip1->di_gen;
206 ip->i_uid = dip1->di_uid;
207 ip->i_gid = dip1->di_gid;
208 if (ffs_oldfscompat_inode_read(fs, ip->i_dp, now) &&
209 fs->fs_ronly == 0)
210 UFS_INODE_SET_FLAG(ip, IN_MODIFIED);
211 return (0);
212 }
213 dip2 = ((struct ufs2_dinode *)bp->b_data + ino_to_fsbo(fs, ino));
214 if ((error = ffs_verify_dinode_ckhash(fs, dip2)) != 0 &&
215 !ffs_fsfail_cleanup(ITOUMP(ip), error)) {
216 printf("%s: inode %jd: check-hash failed\n", fs->fs_fsmnt,
217 (intmax_t)ino);
218 return (error);
219 }
220 *ip->i_din2 = *dip2;
221 dip2 = ip->i_din2;
222 ip->i_mode = dip2->di_mode;
223 ip->i_nlink = dip2->di_nlink;
224 ip->i_effnlink = dip2->di_nlink;
225 ip->i_size = dip2->di_size;
226 ip->i_flags = dip2->di_flags;
227 ip->i_gen = dip2->di_gen;
228 ip->i_uid = dip2->di_uid;
229 ip->i_gid = dip2->di_gid;
230 if (ffs_oldfscompat_inode_read(fs, ip->i_dp, now) && fs->fs_ronly == 0)
231 UFS_INODE_SET_FLAG(ip, IN_MODIFIED);
232 return (0);
233 }
234
235 /*
236 * Verify that a filesystem block number is a valid data block.
237 * This routine is only called on untrusted filesystems.
238 */
239 static int
ffs_check_blkno(struct mount * mp,ino_t inum,ufs2_daddr_t daddr,int blksize)240 ffs_check_blkno(struct mount *mp, ino_t inum, ufs2_daddr_t daddr, int blksize)
241 {
242 struct fs *fs;
243 struct ufsmount *ump;
244 ufs2_daddr_t end_daddr;
245 int cg, havemtx;
246
247 KASSERT((mp->mnt_flag & MNT_UNTRUSTED) != 0,
248 ("ffs_check_blkno called on a trusted file system"));
249 ump = VFSTOUFS(mp);
250 fs = ump->um_fs;
251 cg = dtog(fs, daddr);
252 end_daddr = daddr + numfrags(fs, blksize);
253 /*
254 * Verify that the block number is a valid data block. Also check
255 * that it does not point to an inode block or a superblock. Accept
256 * blocks that are unalloacted (0) or part of snapshot metadata
257 * (BLK_NOCOPY or BLK_SNAP).
258 *
259 * Thus, the block must be in a valid range for the filesystem and
260 * either in the space before a backup superblock (except the first
261 * cylinder group where that space is used by the bootstrap code) or
262 * after the inode blocks and before the end of the cylinder group.
263 */
264 if ((uint64_t)daddr <= BLK_SNAP ||
265 ((uint64_t)end_daddr <= fs->fs_size &&
266 ((cg > 0 && end_daddr <= cgsblock(fs, cg)) ||
267 (daddr >= cgdmin(fs, cg) &&
268 end_daddr <= cgbase(fs, cg) + fs->fs_fpg))))
269 return (0);
270 if ((havemtx = mtx_owned(UFS_MTX(ump))) == 0)
271 UFS_LOCK(ump);
272 if (ppsratecheck(&ump->um_last_integritymsg,
273 &ump->um_secs_integritymsg, 1)) {
274 UFS_UNLOCK(ump);
275 uprintf("\n%s: inode %jd, out-of-range indirect block "
276 "number %jd\n", mp->mnt_stat.f_mntonname, inum, daddr);
277 if (havemtx)
278 UFS_LOCK(ump);
279 } else if (!havemtx)
280 UFS_UNLOCK(ump);
281 return (EINTEGRITY);
282 }
283
284 /*
285 * On first ENXIO error, initiate an asynchronous forcible unmount.
286 * Used to unmount filesystems whose underlying media has gone away.
287 *
288 * Return true if a cleanup is in progress.
289 */
290 int
ffs_fsfail_cleanup(struct ufsmount * ump,int error)291 ffs_fsfail_cleanup(struct ufsmount *ump, int error)
292 {
293 int retval;
294
295 UFS_LOCK(ump);
296 retval = ffs_fsfail_cleanup_locked(ump, error);
297 UFS_UNLOCK(ump);
298 return (retval);
299 }
300
301 int
ffs_fsfail_cleanup_locked(struct ufsmount * ump,int error)302 ffs_fsfail_cleanup_locked(struct ufsmount *ump, int error)
303 {
304 mtx_assert(UFS_MTX(ump), MA_OWNED);
305 if (error == ENXIO && (ump->um_flags & UM_FSFAIL_CLEANUP) == 0) {
306 ump->um_flags |= UM_FSFAIL_CLEANUP;
307 if (ump->um_mountp == rootvnode->v_mount)
308 panic("UFS: root fs would be forcibly unmounted");
309
310 /*
311 * Queue an async forced unmount.
312 */
313 vfs_ref(ump->um_mountp);
314 dounmount(ump->um_mountp,
315 MNT_FORCE | MNT_RECURSE | MNT_DEFERRED, curthread);
316 printf("UFS: forcibly unmounting %s from %s\n",
317 ump->um_mountp->mnt_stat.f_mntfromname,
318 ump->um_mountp->mnt_stat.f_mntonname);
319 }
320 return ((ump->um_flags & UM_FSFAIL_CLEANUP) != 0);
321 }
322
323 /*
324 * Wrapper used during ENXIO cleanup to allocate empty buffers when
325 * the kernel is unable to read the real one. They are needed so that
326 * the soft updates code can use them to unwind its dependencies.
327 */
328 int
ffs_breadz(struct ufsmount * ump,struct vnode * vp,daddr_t lblkno,daddr_t dblkno,int size,daddr_t * rablkno,int * rabsize,int cnt,struct ucred * cred,int flags,void (* ckhashfunc)(struct buf *),struct buf ** bpp)329 ffs_breadz(struct ufsmount *ump, struct vnode *vp, daddr_t lblkno,
330 daddr_t dblkno, int size, daddr_t *rablkno, int *rabsize, int cnt,
331 struct ucred *cred, int flags, void (*ckhashfunc)(struct buf *),
332 struct buf **bpp)
333 {
334 int error;
335
336 flags |= GB_CVTENXIO;
337 error = breadn_flags(vp, lblkno, dblkno, size, rablkno, rabsize, cnt,
338 cred, flags, ckhashfunc, bpp);
339 if (error != 0 && ffs_fsfail_cleanup(ump, error)) {
340 error = getblkx(vp, lblkno, dblkno, size, 0, 0, flags, bpp);
341 KASSERT(error == 0, ("getblkx failed"));
342 vfs_bio_bzero_buf(*bpp, 0, size);
343 }
344 return (error);
345 }
346
347 static int
ffs_mount(struct mount * mp)348 ffs_mount(struct mount *mp)
349 {
350 struct vnode *devvp, *odevvp;
351 struct thread *td;
352 struct ufsmount *ump = NULL;
353 struct fs *fs;
354 int error, flags;
355 int error1 __diagused;
356 uint64_t mntorflags, saved_mnt_flag;
357 accmode_t accmode;
358 struct nameidata ndp;
359 char *fspec;
360 bool mounted_softdep;
361
362 td = curthread;
363 if (vfs_filteropt(mp->mnt_optnew, ffs_opts))
364 return (EINVAL);
365 if (uma_inode == NULL) {
366 uma_inode = uma_zcreate("FFS inode",
367 sizeof(struct inode), NULL, NULL, NULL, NULL,
368 UMA_ALIGN_PTR, 0);
369 uma_ufs1 = uma_zcreate("FFS1 dinode",
370 sizeof(struct ufs1_dinode), NULL, NULL, NULL, NULL,
371 UMA_ALIGN_PTR, 0);
372 uma_ufs2 = uma_zcreate("FFS2 dinode",
373 sizeof(struct ufs2_dinode), NULL, NULL, NULL, NULL,
374 UMA_ALIGN_PTR, 0);
375 VFS_SMR_ZONE_SET(uma_inode);
376 }
377
378 vfs_deleteopt(mp->mnt_optnew, "groupquota");
379 vfs_deleteopt(mp->mnt_optnew, "userquota");
380
381 fspec = vfs_getopts(mp->mnt_optnew, "from", &error);
382 if (error)
383 return (error);
384
385 mntorflags = 0;
386 if (vfs_getopt(mp->mnt_optnew, "untrusted", NULL, NULL) == 0)
387 mntorflags |= MNT_UNTRUSTED;
388
389 if (vfs_getopt(mp->mnt_optnew, "acls", NULL, NULL) == 0)
390 mntorflags |= MNT_ACLS;
391
392 if (vfs_getopt(mp->mnt_optnew, "snapshot", NULL, NULL) == 0) {
393 mntorflags |= MNT_SNAPSHOT;
394 /*
395 * Once we have set the MNT_SNAPSHOT flag, do not
396 * persist "snapshot" in the options list.
397 */
398 vfs_deleteopt(mp->mnt_optnew, "snapshot");
399 vfs_deleteopt(mp->mnt_opt, "snapshot");
400 }
401
402 if (vfs_getopt(mp->mnt_optnew, "nfsv4acls", NULL, NULL) == 0) {
403 if (mntorflags & MNT_ACLS) {
404 vfs_mount_error(mp,
405 "\"acls\" and \"nfsv4acls\" options "
406 "are mutually exclusive");
407 return (EINVAL);
408 }
409 mntorflags |= MNT_NFS4ACLS;
410 }
411
412 MNT_ILOCK(mp);
413 mp->mnt_kern_flag &= ~MNTK_FPLOOKUP;
414 mp->mnt_flag |= mntorflags;
415 MNT_IUNLOCK(mp);
416
417 /*
418 * If this is a snapshot request, take the snapshot.
419 */
420 if (mp->mnt_flag & MNT_SNAPSHOT) {
421 if ((mp->mnt_flag & MNT_UPDATE) == 0)
422 return (EINVAL);
423 return (ffs_snapshot(mp, fspec));
424 }
425
426 /*
427 * Must not call namei() while owning busy ref.
428 */
429 if (mp->mnt_flag & MNT_UPDATE)
430 vfs_unbusy(mp);
431
432 /*
433 * Not an update, or updating the name: look up the name
434 * and verify that it refers to a sensible disk device.
435 */
436 NDINIT(&ndp, LOOKUP, FOLLOW | LOCKLEAF, UIO_SYSSPACE, fspec);
437 error = namei(&ndp);
438 if ((mp->mnt_flag & MNT_UPDATE) != 0) {
439 /*
440 * Unmount does not start if MNT_UPDATE is set. Mount
441 * update busies mp before setting MNT_UPDATE. We
442 * must be able to retain our busy ref successfully,
443 * without sleep.
444 */
445 error1 = vfs_busy(mp, MBF_NOWAIT);
446 MPASS(error1 == 0);
447 }
448 if (error != 0)
449 return (error);
450 NDFREE_PNBUF(&ndp);
451 if (!vn_isdisk_error(ndp.ni_vp, &error)) {
452 vput(ndp.ni_vp);
453 return (error);
454 }
455
456 /*
457 * If mount by non-root, then verify that user has necessary
458 * permissions on the device.
459 */
460 accmode = VREAD;
461 if ((mp->mnt_flag & MNT_RDONLY) == 0)
462 accmode |= VWRITE;
463 error = VOP_ACCESS(ndp.ni_vp, accmode, td->td_ucred, td);
464 if (error)
465 error = priv_check(td, PRIV_VFS_MOUNT_PERM);
466 if (error) {
467 vput(ndp.ni_vp);
468 return (error);
469 }
470
471 /*
472 * New mount
473 *
474 * We need the name for the mount point (also used for
475 * "last mounted on") copied in. If an error occurs,
476 * the mount point is discarded by the upper level code.
477 * Note that vfs_mount_alloc() populates f_mntonname for us.
478 */
479 if ((mp->mnt_flag & MNT_UPDATE) == 0) {
480 if ((error = ffs_mountfs(ndp.ni_vp, mp, td)) != 0) {
481 vrele(ndp.ni_vp);
482 return (error);
483 }
484 } else {
485 /*
486 * When updating, check whether changing from read-only to
487 * read/write; if there is no device name, that's all we do.
488 */
489 ump = VFSTOUFS(mp);
490 fs = ump->um_fs;
491 odevvp = ump->um_odevvp;
492 devvp = ump->um_devvp;
493
494 /*
495 * If it's not the same vnode, or at least the same device
496 * then it's not correct.
497 */
498 if (ndp.ni_vp->v_rdev != ump->um_odevvp->v_rdev)
499 error = EINVAL; /* needs translation */
500 vput(ndp.ni_vp);
501 if (error)
502 return (error);
503 if (fs->fs_ronly == 0 &&
504 vfs_flagopt(mp->mnt_optnew, "ro", NULL, 0)) {
505 /*
506 * Flush any dirty data and suspend filesystem.
507 */
508 if ((error = vn_start_write(NULL, &mp, V_WAIT)) != 0)
509 return (error);
510 error = vfs_write_suspend_umnt(mp);
511 if (error != 0)
512 return (error);
513
514 fs->fs_ronly = 1;
515 if (MOUNTEDSOFTDEP(mp)) {
516 MNT_ILOCK(mp);
517 mp->mnt_flag &= ~MNT_SOFTDEP;
518 MNT_IUNLOCK(mp);
519 mounted_softdep = true;
520 } else
521 mounted_softdep = false;
522
523 /*
524 * Check for and optionally get rid of files open
525 * for writing.
526 */
527 flags = WRITECLOSE;
528 if (mp->mnt_flag & MNT_FORCE)
529 flags |= FORCECLOSE;
530 if (mounted_softdep) {
531 error = softdep_flushfiles(mp, flags, td);
532 } else {
533 error = ffs_flushfiles(mp, flags, td);
534 }
535 if (error) {
536 fs->fs_ronly = 0;
537 if (mounted_softdep) {
538 MNT_ILOCK(mp);
539 mp->mnt_flag |= MNT_SOFTDEP;
540 MNT_IUNLOCK(mp);
541 }
542 vfs_write_resume(mp, 0);
543 return (error);
544 }
545
546 if (fs->fs_pendingblocks != 0 ||
547 fs->fs_pendinginodes != 0) {
548 printf("WARNING: %s Update error: blocks %jd "
549 "files %d\n", fs->fs_fsmnt,
550 (intmax_t)fs->fs_pendingblocks,
551 fs->fs_pendinginodes);
552 fs->fs_pendingblocks = 0;
553 fs->fs_pendinginodes = 0;
554 }
555 if ((fs->fs_flags & (FS_UNCLEAN | FS_NEEDSFSCK)) == 0)
556 fs->fs_clean = 1;
557 if ((error = ffs_sbupdate(ump, MNT_WAIT, 0)) != 0) {
558 fs->fs_ronly = 0;
559 fs->fs_clean = 0;
560 if (mounted_softdep) {
561 MNT_ILOCK(mp);
562 mp->mnt_flag |= MNT_SOFTDEP;
563 MNT_IUNLOCK(mp);
564 }
565 vfs_write_resume(mp, 0);
566 return (error);
567 }
568 if (mounted_softdep)
569 softdep_unmount(mp);
570 g_topology_lock();
571 /*
572 * Drop our write and exclusive access.
573 */
574 g_access(ump->um_cp, 0, -1, -1);
575 g_topology_unlock();
576 MNT_ILOCK(mp);
577 mp->mnt_flag |= MNT_RDONLY;
578 MNT_IUNLOCK(mp);
579 /*
580 * Allow the writers to note that filesystem
581 * is ro now.
582 */
583 vfs_write_resume(mp, 0);
584 }
585 if ((mp->mnt_flag & MNT_RELOAD) &&
586 (error = ffs_reload(mp, 0)) != 0) {
587 return (error);
588 } else {
589 /* ffs_reload replaces the superblock structure */
590 fs = ump->um_fs;
591 }
592 if (fs->fs_ronly &&
593 !vfs_flagopt(mp->mnt_optnew, "ro", NULL, 0)) {
594 /*
595 * If upgrade to read-write by non-root, then verify
596 * that user has necessary permissions on the device.
597 */
598 vn_lock(odevvp, LK_EXCLUSIVE | LK_RETRY);
599 error = VOP_ACCESS(odevvp, VREAD | VWRITE,
600 td->td_ucred, td);
601 if (error)
602 error = priv_check(td, PRIV_VFS_MOUNT_PERM);
603 VOP_UNLOCK(odevvp);
604 if (error) {
605 return (error);
606 }
607 /*
608 * Refuse upgrade of NetBSD WAPBL filesystem to
609 * read-write; see validate_sblock() for details.
610 */
611 if (fs->fs_magic == FS_UFS2_MAGIC &&
612 fs->fs_metaspace > fs->fs_fpg / 2) {
613 vfs_mount_error(mp,
614 "WAPBL filesystem must be mounted read-only");
615 return (EROFS);
616 }
617 fs->fs_flags &= ~FS_UNCLEAN;
618 if (fs->fs_clean == 0) {
619 fs->fs_flags |= FS_UNCLEAN;
620 if ((mp->mnt_flag & MNT_FORCE) ||
621 ((fs->fs_flags &
622 (FS_SUJ | FS_NEEDSFSCK)) == 0 &&
623 (fs->fs_flags & FS_DOSOFTDEP))) {
624 printf("WARNING: %s was not properly "
625 "dismounted\n",
626 mp->mnt_stat.f_mntonname);
627 } else {
628 vfs_mount_error(mp,
629 "R/W mount of %s denied. %s.%s",
630 mp->mnt_stat.f_mntonname,
631 "Filesystem is not clean - run fsck",
632 (fs->fs_flags & FS_SUJ) == 0 ? "" :
633 " Forced mount will invalidate"
634 " journal contents");
635 return (EPERM);
636 }
637 }
638 g_topology_lock();
639 /*
640 * Request exclusive write access.
641 */
642 error = g_access(ump->um_cp, 0, 1, 1);
643 g_topology_unlock();
644 if (error)
645 return (error);
646 if ((error = vn_start_write(NULL, &mp, V_WAIT)) != 0)
647 return (error);
648 error = vfs_write_suspend_umnt(mp);
649 if (error != 0)
650 return (error);
651 fs->fs_ronly = 0;
652 MNT_ILOCK(mp);
653 saved_mnt_flag = MNT_RDONLY;
654 if (MOUNTEDSOFTDEP(mp) && (mp->mnt_flag &
655 MNT_ASYNC) != 0)
656 saved_mnt_flag |= MNT_ASYNC;
657 mp->mnt_flag &= ~saved_mnt_flag;
658 MNT_IUNLOCK(mp);
659 fs->fs_mtime = time_second;
660 /* check to see if we need to start softdep */
661 if ((fs->fs_flags & FS_DOSOFTDEP) &&
662 (error = softdep_mount(devvp, mp, fs, td->td_ucred))){
663 fs->fs_ronly = 1;
664 MNT_ILOCK(mp);
665 mp->mnt_flag |= saved_mnt_flag;
666 MNT_IUNLOCK(mp);
667 vfs_write_resume(mp, 0);
668 return (error);
669 }
670 fs->fs_clean = 0;
671 if ((error = ffs_sbupdate(ump, MNT_WAIT, 0)) != 0) {
672 fs->fs_ronly = 1;
673 if ((fs->fs_flags & FS_DOSOFTDEP) != 0)
674 softdep_unmount(mp);
675 MNT_ILOCK(mp);
676 mp->mnt_flag |= saved_mnt_flag;
677 MNT_IUNLOCK(mp);
678 vfs_write_resume(mp, 0);
679 return (error);
680 }
681 if (fs->fs_snapinum[0] != 0)
682 ffs_snapshot_mount(mp);
683 vfs_write_resume(mp, 0);
684 }
685 /*
686 * Soft updates is incompatible with "async",
687 * so if we are doing softupdates stop the user
688 * from setting the async flag in an update.
689 * Softdep_mount() clears it in an initial mount
690 * or ro->rw remount.
691 */
692 if (MOUNTEDSOFTDEP(mp)) {
693 /* XXX: Reset too late ? */
694 MNT_ILOCK(mp);
695 mp->mnt_flag &= ~MNT_ASYNC;
696 MNT_IUNLOCK(mp);
697 }
698 /*
699 * Keep MNT_ACLS flag if it is stored in superblock.
700 */
701 if ((fs->fs_flags & FS_ACLS) != 0) {
702 /* XXX: Set too late ? */
703 MNT_ILOCK(mp);
704 mp->mnt_flag |= MNT_ACLS;
705 MNT_IUNLOCK(mp);
706 }
707
708 if ((fs->fs_flags & FS_NFS4ACLS) != 0) {
709 /* XXX: Set too late ? */
710 MNT_ILOCK(mp);
711 mp->mnt_flag |= MNT_NFS4ACLS;
712 MNT_IUNLOCK(mp);
713 }
714
715 }
716
717 MNT_ILOCK(mp);
718 /*
719 * This is racy versus lookup, see ufs_fplookup_vexec for details.
720 */
721 if ((mp->mnt_kern_flag & MNTK_FPLOOKUP) != 0)
722 panic("MNTK_FPLOOKUP set on mount %p when it should not be", mp);
723 if ((mp->mnt_flag & (MNT_ACLS | MNT_NFS4ACLS | MNT_UNION)) == 0)
724 mp->mnt_kern_flag |= MNTK_FPLOOKUP;
725 MNT_IUNLOCK(mp);
726
727 vfs_mountedfrom(mp, fspec);
728 return (0);
729 }
730
731 /*
732 * Compatibility with old mount system call.
733 */
734
735 static int
ffs_cmount(struct mntarg * ma,void * data,uint64_t flags)736 ffs_cmount(struct mntarg *ma, void *data, uint64_t flags)
737 {
738 struct ufs_args args;
739 int error;
740
741 if (data == NULL)
742 return (EINVAL);
743 error = copyin(data, &args, sizeof args);
744 if (error)
745 return (error);
746
747 ma = mount_argsu(ma, "from", args.fspec, MAXPATHLEN);
748 ma = mount_arg(ma, "export", &args.export, sizeof(args.export));
749 error = kernel_mount(ma, flags);
750
751 return (error);
752 }
753
754 /*
755 * Reload all incore data for a filesystem (used after running fsck on
756 * the root filesystem and finding things to fix). If the 'force' flag
757 * is 0, the filesystem must be mounted read-only.
758 *
759 * Things to do to update the mount:
760 * 1) invalidate all cached meta-data.
761 * 2) re-read superblock from disk.
762 * 3) If requested, clear MNTK_SUSPEND2 and MNTK_SUSPENDED flags
763 * to allow secondary writers.
764 * 4) invalidate all cached file data.
765 * 5) re-read inode data for all active vnodes.
766 */
767 int
ffs_reload(struct mount * mp,int flags)768 ffs_reload(struct mount *mp, int flags)
769 {
770 struct vnode *vp, *mvp, *devvp;
771 struct inode *ip;
772 struct buf *bp;
773 struct fs *fs, *newfs;
774 struct ufsmount *ump;
775 int error;
776
777 ump = VFSTOUFS(mp);
778
779 MNT_ILOCK(mp);
780 if ((mp->mnt_flag & MNT_RDONLY) == 0 && (flags & FFSR_FORCE) == 0) {
781 MNT_IUNLOCK(mp);
782 return (EINVAL);
783 }
784 MNT_IUNLOCK(mp);
785
786 /*
787 * Step 1: invalidate all cached meta-data.
788 */
789 devvp = VFSTOUFS(mp)->um_devvp;
790 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
791 if (vinvalbuf(devvp, 0, 0, 0) != 0)
792 panic("ffs_reload: dirty1");
793 VOP_UNLOCK(devvp);
794
795 /*
796 * Step 2: re-read superblock from disk.
797 */
798 if ((error = ffs_sbget(devvp, &newfs, UFS_STDSB, 0, M_UFSMNT,
799 ffs_use_bread)) != 0)
800 return (error);
801 /*
802 * Replace our superblock with the new superblock. Preserve
803 * our read-only status.
804 */
805 fs = VFSTOUFS(mp)->um_fs;
806 newfs->fs_ronly = fs->fs_ronly;
807 free(fs->fs_csp, M_UFSMNT);
808 free(fs->fs_si, M_UFSMNT);
809 free(fs, M_UFSMNT);
810 fs = VFSTOUFS(mp)->um_fs = newfs;
811 ump->um_bsize = fs->fs_bsize;
812 ump->um_maxsymlinklen = fs->fs_maxsymlinklen;
813 UFS_LOCK(ump);
814 if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) {
815 printf("WARNING: %s: reload pending error: blocks %jd "
816 "files %d\n", mp->mnt_stat.f_mntonname,
817 (intmax_t)fs->fs_pendingblocks, fs->fs_pendinginodes);
818 fs->fs_pendingblocks = 0;
819 fs->fs_pendinginodes = 0;
820 }
821 UFS_UNLOCK(ump);
822 /*
823 * Step 3: If requested, clear MNTK_SUSPEND2 and MNTK_SUSPENDED flags
824 * to allow secondary writers.
825 */
826 if ((flags & FFSR_UNSUSPEND) != 0) {
827 MNT_ILOCK(mp);
828 mp->mnt_kern_flag &= ~(MNTK_SUSPENDED | MNTK_SUSPEND2);
829 wakeup(&mp->mnt_flag);
830 MNT_IUNLOCK(mp);
831 }
832
833 loop:
834 MNT_VNODE_FOREACH_ALL(vp, mp, mvp) {
835 /*
836 * Skip syncer vnode.
837 */
838 if (vp->v_type == VNON) {
839 VI_UNLOCK(vp);
840 continue;
841 }
842 /*
843 * Step 4: invalidate all cached file data.
844 */
845 if (vget(vp, LK_EXCLUSIVE | LK_INTERLOCK)) {
846 MNT_VNODE_FOREACH_ALL_ABORT(mp, mvp);
847 goto loop;
848 }
849 if (vinvalbuf(vp, 0, 0, 0))
850 panic("ffs_reload: dirty2");
851 /*
852 * Step 5: re-read inode data for all active vnodes.
853 */
854 ip = VTOI(vp);
855 error =
856 bread(devvp, fsbtodb(fs, ino_to_fsba(fs, ip->i_number)),
857 (int)fs->fs_bsize, NOCRED, &bp);
858 if (error) {
859 vput(vp);
860 MNT_VNODE_FOREACH_ALL_ABORT(mp, mvp);
861 return (error);
862 }
863 if ((error = ffs_load_inode(bp, ip, fs, ip->i_number)) != 0) {
864 brelse(bp);
865 vput(vp);
866 MNT_VNODE_FOREACH_ALL_ABORT(mp, mvp);
867 return (error);
868 }
869 ip->i_effnlink = ip->i_nlink;
870 brelse(bp);
871 vput(vp);
872 }
873 return (0);
874 }
875
876 /*
877 * Common code for mount and mountroot
878 */
879 static int
ffs_mountfs(struct vnode * odevvp,struct mount * mp,struct thread * td)880 ffs_mountfs(struct vnode *odevvp, struct mount *mp, struct thread *td)
881 {
882 struct ufsmount *ump;
883 struct fs *fs;
884 struct cdev *dev;
885 int error, i, len, ronly;
886 struct ucred *cred;
887 struct g_consumer *cp;
888 struct mount *nmp;
889 struct vnode *devvp;
890 int candelete, canspeedup;
891
892 fs = NULL;
893 ump = NULL;
894 cred = td ? td->td_ucred : NOCRED;
895 ronly = (mp->mnt_flag & MNT_RDONLY) != 0;
896
897 devvp = mntfs_allocvp(mp, odevvp);
898 KASSERT(devvp->v_type == VCHR, ("reclaimed devvp"));
899 dev = devvp->v_rdev;
900 KASSERT(dev->si_snapdata == NULL, ("non-NULL snapshot data"));
901 if (atomic_cmpset_acq_ptr((uintptr_t *)&dev->si_mountpt, 0,
902 (uintptr_t)mp) == 0) {
903 mntfs_freevp(devvp);
904 return (EBUSY);
905 }
906 g_topology_lock();
907 error = g_vfs_open(devvp, &cp, "ffs", ronly ? 0 : 1);
908 g_topology_unlock();
909 if (error != 0) {
910 atomic_store_rel_ptr((uintptr_t *)&dev->si_mountpt, 0);
911 mntfs_freevp(devvp);
912 return (error);
913 }
914 dev_ref(dev);
915 devvp->v_bufobj.bo_ops = &ffs_ops;
916 BO_LOCK(&odevvp->v_bufobj);
917 odevvp->v_bufobj.bo_flag |= BO_NOBUFS;
918 BO_UNLOCK(&odevvp->v_bufobj);
919 VOP_UNLOCK(devvp);
920 if (dev->si_iosize_max != 0)
921 mp->mnt_iosize_max = dev->si_iosize_max;
922 if (mp->mnt_iosize_max > maxphys)
923 mp->mnt_iosize_max = maxphys;
924 if ((SBLOCKSIZE % cp->provider->sectorsize) != 0) {
925 error = EINVAL;
926 vfs_mount_error(mp,
927 "Invalid sectorsize %d for superblock size %d",
928 cp->provider->sectorsize, SBLOCKSIZE);
929 goto out;
930 }
931 /* fetch the superblock and summary information */
932 if ((mp->mnt_flag & (MNT_ROOTFS | MNT_FORCE)) != 0)
933 error = ffs_sbsearch(devvp, &fs, 0, M_UFSMNT, ffs_use_bread);
934 else
935 error = ffs_sbget(devvp, &fs, UFS_STDSB, 0, M_UFSMNT,
936 ffs_use_bread);
937 if (error != 0)
938 goto out;
939 /*
940 * Per NetBSD's wapbl(4), systems without WAPBL support should mount it
941 * read-only; see validate_sblock() for details.
942 */
943 if (fs->fs_magic == FS_UFS2_MAGIC &&
944 fs->fs_metaspace > fs->fs_fpg / 2) {
945 if ((mp->mnt_flag & MNT_RDONLY) == 0) {
946 vfs_mount_error(mp,
947 "WAPBL filesystem must be mounted read-only");
948 error = EROFS;
949 goto out;
950 }
951 printf("WARNING: %s: WAPBL filesystem mounted read-only"
952 "(fs_metaspace %jd, fs_fpg/2 %jd)\n",
953 mp->mnt_stat.f_mntonname, (intmax_t)fs->fs_metaspace,
954 (intmax_t)fs->fs_fpg / 2);
955 }
956 fs->fs_flags &= ~FS_UNCLEAN;
957 if (fs->fs_clean == 0) {
958 fs->fs_flags |= FS_UNCLEAN;
959 if (ronly || (mp->mnt_flag & MNT_FORCE) ||
960 ((fs->fs_flags & (FS_SUJ | FS_NEEDSFSCK)) == 0 &&
961 (fs->fs_flags & FS_DOSOFTDEP))) {
962 printf("WARNING: %s was not properly dismounted\n",
963 mp->mnt_stat.f_mntonname);
964 } else {
965 vfs_mount_error(mp, "R/W mount on %s denied. "
966 "Filesystem is not clean - run fsck.%s",
967 mp->mnt_stat.f_mntonname,
968 (fs->fs_flags & FS_SUJ) == 0 ? "" :
969 " Forced mount will invalidate journal contents");
970 error = EPERM;
971 goto out;
972 }
973 if ((fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) &&
974 (mp->mnt_flag & MNT_FORCE)) {
975 printf("WARNING: %s: lost blocks %jd files %d\n",
976 mp->mnt_stat.f_mntonname,
977 (intmax_t)fs->fs_pendingblocks,
978 fs->fs_pendinginodes);
979 fs->fs_pendingblocks = 0;
980 fs->fs_pendinginodes = 0;
981 }
982 }
983 if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) {
984 printf("WARNING: %s: mount pending error: blocks %jd "
985 "files %d\n", mp->mnt_stat.f_mntonname,
986 (intmax_t)fs->fs_pendingblocks, fs->fs_pendinginodes);
987 fs->fs_pendingblocks = 0;
988 fs->fs_pendinginodes = 0;
989 }
990 if ((fs->fs_flags & FS_GJOURNAL) != 0) {
991 #ifdef UFS_GJOURNAL
992 /*
993 * Get journal provider name.
994 */
995 len = 1024;
996 mp->mnt_gjprovider = malloc((uint64_t)len, M_UFSMNT, M_WAITOK);
997 if (g_io_getattr("GJOURNAL::provider", cp, &len,
998 mp->mnt_gjprovider) == 0) {
999 mp->mnt_gjprovider = realloc(mp->mnt_gjprovider, len,
1000 M_UFSMNT, M_WAITOK);
1001 MNT_ILOCK(mp);
1002 mp->mnt_flag |= MNT_GJOURNAL;
1003 MNT_IUNLOCK(mp);
1004 } else {
1005 if ((mp->mnt_flag & MNT_RDONLY) == 0)
1006 printf("WARNING: %s: GJOURNAL flag on fs "
1007 "but no gjournal provider below\n",
1008 mp->mnt_stat.f_mntonname);
1009 free(mp->mnt_gjprovider, M_UFSMNT);
1010 mp->mnt_gjprovider = NULL;
1011 }
1012 #else
1013 printf("WARNING: %s: GJOURNAL flag on fs but no "
1014 "UFS_GJOURNAL support\n", mp->mnt_stat.f_mntonname);
1015 #endif
1016 } else {
1017 mp->mnt_gjprovider = NULL;
1018 }
1019 ump = malloc(sizeof *ump, M_UFSMNT, M_WAITOK | M_ZERO);
1020 ump->um_cp = cp;
1021 ump->um_bo = &devvp->v_bufobj;
1022 ump->um_fs = fs;
1023 if (fs->fs_magic == FS_UFS1_MAGIC) {
1024 ump->um_fstype = UFS1;
1025 ump->um_balloc = ffs_balloc_ufs1;
1026 } else {
1027 ump->um_fstype = UFS2;
1028 ump->um_balloc = ffs_balloc_ufs2;
1029 }
1030 ump->um_blkatoff = ffs_blkatoff;
1031 ump->um_truncate = ffs_truncate;
1032 ump->um_update = ffs_update;
1033 ump->um_valloc = ffs_valloc;
1034 ump->um_vfree = ffs_vfree;
1035 ump->um_ifree = ffs_ifree;
1036 ump->um_rdonly = ffs_rdonly;
1037 ump->um_snapgone = ffs_snapgone;
1038 if ((mp->mnt_flag & MNT_UNTRUSTED) != 0)
1039 ump->um_check_blkno = ffs_check_blkno;
1040 else
1041 ump->um_check_blkno = NULL;
1042 mtx_init(UFS_MTX(ump), "FFS", "FFS Lock", MTX_DEF);
1043 fs->fs_ronly = ronly;
1044 fs->fs_active = NULL;
1045 mp->mnt_data = ump;
1046 mp->mnt_stat.f_fsid.val[0] = fs->fs_id[0];
1047 mp->mnt_stat.f_fsid.val[1] = fs->fs_id[1];
1048 nmp = NULL;
1049 if (fs->fs_id[0] == 0 || fs->fs_id[1] == 0 ||
1050 (nmp = vfs_getvfs(&mp->mnt_stat.f_fsid))) {
1051 if (nmp)
1052 vfs_rel(nmp);
1053 vfs_getnewfsid(mp);
1054 }
1055 ump->um_bsize = fs->fs_bsize;
1056 ump->um_maxsymlinklen = fs->fs_maxsymlinklen;
1057 MNT_ILOCK(mp);
1058 mp->mnt_flag |= MNT_LOCAL;
1059 MNT_IUNLOCK(mp);
1060 if ((fs->fs_flags & FS_MULTILABEL) != 0) {
1061 #ifdef MAC
1062 MNT_ILOCK(mp);
1063 mp->mnt_flag |= MNT_MULTILABEL;
1064 MNT_IUNLOCK(mp);
1065 #else
1066 printf("WARNING: %s: multilabel flag on fs but "
1067 "no MAC support\n", mp->mnt_stat.f_mntonname);
1068 #endif
1069 }
1070 if ((fs->fs_flags & FS_ACLS) != 0) {
1071 #ifdef UFS_ACL
1072 MNT_ILOCK(mp);
1073
1074 if (mp->mnt_flag & MNT_NFS4ACLS)
1075 printf("WARNING: %s: ACLs flag on fs conflicts with "
1076 "\"nfsv4acls\" mount option; option ignored\n",
1077 mp->mnt_stat.f_mntonname);
1078 mp->mnt_flag &= ~MNT_NFS4ACLS;
1079 mp->mnt_flag |= MNT_ACLS;
1080
1081 MNT_IUNLOCK(mp);
1082 #else
1083 printf("WARNING: %s: ACLs flag on fs but no ACLs support\n",
1084 mp->mnt_stat.f_mntonname);
1085 #endif
1086 }
1087 if ((fs->fs_flags & FS_NFS4ACLS) != 0) {
1088 #ifdef UFS_ACL
1089 MNT_ILOCK(mp);
1090
1091 if (mp->mnt_flag & MNT_ACLS)
1092 printf("WARNING: %s: NFSv4 ACLs flag on fs conflicts "
1093 "with \"acls\" mount option; option ignored\n",
1094 mp->mnt_stat.f_mntonname);
1095 mp->mnt_flag &= ~MNT_ACLS;
1096 mp->mnt_flag |= MNT_NFS4ACLS;
1097
1098 MNT_IUNLOCK(mp);
1099 #else
1100 printf("WARNING: %s: NFSv4 ACLs flag on fs but no "
1101 "ACLs support\n", mp->mnt_stat.f_mntonname);
1102 #endif
1103 }
1104 if ((fs->fs_flags & FS_TRIM) != 0) {
1105 len = sizeof(int);
1106 if (g_io_getattr("GEOM::candelete", cp, &len,
1107 &candelete) == 0) {
1108 if (candelete)
1109 ump->um_flags |= UM_CANDELETE;
1110 else
1111 printf("WARNING: %s: TRIM flag on fs but disk "
1112 "does not support TRIM\n",
1113 mp->mnt_stat.f_mntonname);
1114 } else {
1115 printf("WARNING: %s: TRIM flag on fs but disk does "
1116 "not confirm that it supports TRIM\n",
1117 mp->mnt_stat.f_mntonname);
1118 }
1119 if (((ump->um_flags) & UM_CANDELETE) != 0) {
1120 ump->um_trim_tq = taskqueue_create("trim", M_WAITOK,
1121 taskqueue_thread_enqueue, &ump->um_trim_tq);
1122 taskqueue_start_threads(&ump->um_trim_tq, 1, PVFS,
1123 "%s trim", mp->mnt_stat.f_mntonname);
1124 ump->um_trimhash = hashinit(MAXTRIMIO, M_TRIM,
1125 &ump->um_trimlisthashsize);
1126 }
1127 }
1128
1129 len = sizeof(int);
1130 if (g_io_getattr("GEOM::canspeedup", cp, &len, &canspeedup) == 0) {
1131 if (canspeedup)
1132 ump->um_flags |= UM_CANSPEEDUP;
1133 }
1134
1135 ump->um_mountp = mp;
1136 ump->um_dev = dev;
1137 ump->um_devvp = devvp;
1138 ump->um_odevvp = odevvp;
1139 ump->um_nindir = fs->fs_nindir;
1140 ump->um_bptrtodb = fs->fs_fsbtodb;
1141 ump->um_seqinc = fs->fs_frag;
1142 for (i = 0; i < MAXQUOTAS; i++)
1143 ump->um_quotas[i] = NULL;
1144 #ifdef UFS_EXTATTR
1145 ufs_extattr_uepm_init(&ump->um_extattr);
1146 #endif
1147 /*
1148 * Set FS local "last mounted on" information (NULL pad)
1149 */
1150 bzero(fs->fs_fsmnt, MAXMNTLEN);
1151 strlcpy(fs->fs_fsmnt, mp->mnt_stat.f_mntonname, MAXMNTLEN);
1152 mp->mnt_stat.f_iosize = fs->fs_bsize;
1153
1154 if (mp->mnt_flag & MNT_ROOTFS) {
1155 /*
1156 * Root mount; update timestamp in mount structure.
1157 * this will be used by the common root mount code
1158 * to update the system clock.
1159 */
1160 mp->mnt_time = fs->fs_time;
1161 }
1162
1163 if (ronly == 0) {
1164 fs->fs_mtime = time_second;
1165 if ((fs->fs_flags & FS_DOSOFTDEP) &&
1166 (error = softdep_mount(devvp, mp, fs, cred)) != 0) {
1167 ffs_flushfiles(mp, FORCECLOSE, td);
1168 goto out;
1169 }
1170 if (fs->fs_snapinum[0] != 0)
1171 ffs_snapshot_mount(mp);
1172 fs->fs_fmod = 1;
1173 fs->fs_clean = 0;
1174 (void) ffs_sbupdate(ump, MNT_WAIT, 0);
1175 }
1176 /*
1177 * Initialize filesystem state information in mount struct.
1178 */
1179 MNT_ILOCK(mp);
1180 mp->mnt_kern_flag |= MNTK_LOOKUP_SHARED | MNTK_EXTENDED_SHARED |
1181 MNTK_NO_IOPF | MNTK_UNMAPPED_BUFS | MNTK_USES_BCACHE;
1182 MNT_IUNLOCK(mp);
1183 #ifdef UFS_EXTATTR
1184 #ifdef UFS_EXTATTR_AUTOSTART
1185 /*
1186 *
1187 * Auto-starting does the following:
1188 * - check for /.attribute in the fs, and extattr_start if so
1189 * - for each file in .attribute, enable that file with
1190 * an attribute of the same name.
1191 * Not clear how to report errors -- probably eat them.
1192 * This would all happen while the filesystem was busy/not
1193 * available, so would effectively be "atomic".
1194 */
1195 (void) ufs_extattr_autostart(mp, td);
1196 #endif /* !UFS_EXTATTR_AUTOSTART */
1197 #endif /* !UFS_EXTATTR */
1198 return (0);
1199 out:
1200 if (fs != NULL) {
1201 free(fs->fs_csp, M_UFSMNT);
1202 free(fs->fs_si, M_UFSMNT);
1203 free(fs, M_UFSMNT);
1204 }
1205 if (cp != NULL) {
1206 g_topology_lock();
1207 g_vfs_close(cp);
1208 g_topology_unlock();
1209 }
1210 if (ump != NULL) {
1211 mtx_destroy(UFS_MTX(ump));
1212 if (mp->mnt_gjprovider != NULL) {
1213 free(mp->mnt_gjprovider, M_UFSMNT);
1214 mp->mnt_gjprovider = NULL;
1215 }
1216 MPASS(ump->um_softdep == NULL);
1217 free(ump, M_UFSMNT);
1218 mp->mnt_data = NULL;
1219 }
1220 BO_LOCK(&odevvp->v_bufobj);
1221 odevvp->v_bufobj.bo_flag &= ~BO_NOBUFS;
1222 BO_UNLOCK(&odevvp->v_bufobj);
1223 atomic_store_rel_ptr((uintptr_t *)&dev->si_mountpt, 0);
1224 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
1225 mntfs_freevp(devvp);
1226 dev_rel(dev);
1227 return (error);
1228 }
1229
1230 /*
1231 * A read function for use by filesystem-layer routines.
1232 */
1233 static int
ffs_use_bread(void * devfd,off_t loc,void ** bufp,int size)1234 ffs_use_bread(void *devfd, off_t loc, void **bufp, int size)
1235 {
1236 struct buf *bp;
1237 int error;
1238
1239 KASSERT(*bufp == NULL, ("ffs_use_bread: non-NULL *bufp %p\n", *bufp));
1240 *bufp = malloc(size, M_UFSMNT, M_WAITOK);
1241 if ((error = bread((struct vnode *)devfd, btodb(loc), size, NOCRED,
1242 &bp)) != 0)
1243 return (error);
1244 bcopy(bp->b_data, *bufp, size);
1245 bp->b_flags |= B_INVAL | B_NOCACHE;
1246 brelse(bp);
1247 return (0);
1248 }
1249
1250 /*
1251 * unmount system call
1252 */
1253 static int
ffs_unmount(struct mount * mp,int mntflags)1254 ffs_unmount(struct mount *mp, int mntflags)
1255 {
1256 struct thread *td;
1257 struct ufsmount *ump = VFSTOUFS(mp);
1258 struct fs *fs;
1259 int error, flags, susp;
1260 #ifdef UFS_EXTATTR
1261 int e_restart;
1262 #endif
1263
1264 flags = 0;
1265 td = curthread;
1266 fs = ump->um_fs;
1267 if (mntflags & MNT_FORCE)
1268 flags |= FORCECLOSE;
1269 susp = fs->fs_ronly == 0;
1270 #ifdef UFS_EXTATTR
1271 if ((error = ufs_extattr_stop(mp, td))) {
1272 if (error != EOPNOTSUPP)
1273 printf("WARNING: unmount %s: ufs_extattr_stop "
1274 "returned errno %d\n", mp->mnt_stat.f_mntonname,
1275 error);
1276 e_restart = 0;
1277 } else {
1278 ufs_extattr_uepm_destroy(&ump->um_extattr);
1279 e_restart = 1;
1280 }
1281 #endif
1282 if (susp) {
1283 error = vfs_write_suspend_umnt(mp);
1284 if (error != 0)
1285 goto fail1;
1286 }
1287 if (MOUNTEDSOFTDEP(mp))
1288 error = softdep_flushfiles(mp, flags, td);
1289 else
1290 error = ffs_flushfiles(mp, flags, td);
1291 if (error != 0 && !ffs_fsfail_cleanup(ump, error))
1292 goto fail;
1293
1294 UFS_LOCK(ump);
1295 if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) {
1296 printf("WARNING: unmount %s: pending error: blocks %jd "
1297 "files %d\n", fs->fs_fsmnt, (intmax_t)fs->fs_pendingblocks,
1298 fs->fs_pendinginodes);
1299 fs->fs_pendingblocks = 0;
1300 fs->fs_pendinginodes = 0;
1301 }
1302 UFS_UNLOCK(ump);
1303 if (MOUNTEDSOFTDEP(mp))
1304 softdep_unmount(mp);
1305 MPASS(ump->um_softdep == NULL);
1306 if (fs->fs_ronly == 0) {
1307 fs->fs_clean = fs->fs_flags & (FS_UNCLEAN|FS_NEEDSFSCK) ? 0 : 1;
1308 error = ffs_sbupdate(ump, MNT_WAIT, 0);
1309 if (ffs_fsfail_cleanup(ump, error))
1310 error = 0;
1311 if (error != 0 && !ffs_fsfail_cleanup(ump, error)) {
1312 fs->fs_clean = 0;
1313 goto fail;
1314 }
1315 }
1316 if (susp)
1317 vfs_write_resume(mp, VR_START_WRITE);
1318 if (ump->um_trim_tq != NULL) {
1319 MPASS(ump->um_trim_inflight == 0);
1320 taskqueue_free(ump->um_trim_tq);
1321 free (ump->um_trimhash, M_TRIM);
1322 }
1323 vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY);
1324 g_topology_lock();
1325 g_vfs_close(ump->um_cp);
1326 g_topology_unlock();
1327 BO_LOCK(&ump->um_odevvp->v_bufobj);
1328 ump->um_odevvp->v_bufobj.bo_flag &= ~BO_NOBUFS;
1329 BO_UNLOCK(&ump->um_odevvp->v_bufobj);
1330 atomic_store_rel_ptr((uintptr_t *)&ump->um_dev->si_mountpt, 0);
1331 mntfs_freevp(ump->um_devvp);
1332 vrele(ump->um_odevvp);
1333 dev_rel(ump->um_dev);
1334 mtx_destroy(UFS_MTX(ump));
1335 if (mp->mnt_gjprovider != NULL) {
1336 free(mp->mnt_gjprovider, M_UFSMNT);
1337 mp->mnt_gjprovider = NULL;
1338 }
1339 free(fs->fs_csp, M_UFSMNT);
1340 free(fs->fs_si, M_UFSMNT);
1341 free(fs, M_UFSMNT);
1342 free(ump, M_UFSMNT);
1343 mp->mnt_data = NULL;
1344 if (td->td_su == mp) {
1345 td->td_su = NULL;
1346 vfs_rel(mp);
1347 }
1348 return (error);
1349
1350 fail:
1351 if (susp)
1352 vfs_write_resume(mp, VR_START_WRITE);
1353 fail1:
1354 #ifdef UFS_EXTATTR
1355 if (e_restart) {
1356 ufs_extattr_uepm_init(&ump->um_extattr);
1357 #ifdef UFS_EXTATTR_AUTOSTART
1358 (void) ufs_extattr_autostart(mp, td);
1359 #endif
1360 }
1361 #endif
1362
1363 return (error);
1364 }
1365
1366 /*
1367 * Flush out all the files in a filesystem.
1368 */
1369 int
ffs_flushfiles(struct mount * mp,int flags,struct thread * td)1370 ffs_flushfiles(struct mount *mp, int flags, struct thread *td)
1371 {
1372 struct ufsmount *ump;
1373 int qerror, error;
1374
1375 ump = VFSTOUFS(mp);
1376 qerror = 0;
1377 #ifdef QUOTA
1378 if (mp->mnt_flag & MNT_QUOTA) {
1379 int i;
1380 error = vflush(mp, 0, SKIPSYSTEM|flags, td);
1381 if (error)
1382 return (error);
1383 for (i = 0; i < MAXQUOTAS; i++) {
1384 error = quotaoff(td, mp, i);
1385 if (error != 0) {
1386 if ((flags & EARLYFLUSH) == 0)
1387 return (error);
1388 else
1389 qerror = error;
1390 }
1391 }
1392
1393 /*
1394 * Here we fall through to vflush again to ensure that
1395 * we have gotten rid of all the system vnodes, unless
1396 * quotas must not be closed.
1397 */
1398 }
1399 #endif
1400 /* devvp is not locked there */
1401 if (ump->um_devvp->v_vflag & VV_COPYONWRITE) {
1402 if ((error = vflush(mp, 0, SKIPSYSTEM | flags, td)) != 0)
1403 return (error);
1404 ffs_snapshot_unmount(mp);
1405 flags |= FORCECLOSE;
1406 /*
1407 * Here we fall through to vflush again to ensure
1408 * that we have gotten rid of all the system vnodes.
1409 */
1410 }
1411
1412 /*
1413 * Do not close system files if quotas were not closed, to be
1414 * able to sync the remaining dquots. The freeblks softupdate
1415 * workitems might hold a reference on a dquot, preventing
1416 * quotaoff() from completing. Next round of
1417 * softdep_flushworklist() iteration should process the
1418 * blockers, allowing the next run of quotaoff() to finally
1419 * flush held dquots.
1420 *
1421 * Otherwise, flush all the files.
1422 */
1423 if (qerror == 0 && (error = vflush(mp, 0, flags, td)) != 0)
1424 return (error);
1425
1426 /*
1427 * If this is a forcible unmount and there were any files that
1428 * were unlinked but still open, then vflush() will have
1429 * truncated and freed those files, which might have started
1430 * some trim work. Wait here for any trims to complete
1431 * and process the blkfrees which follow the trims.
1432 * This may create more dirty devvp buffers and softdep deps.
1433 */
1434 if (ump->um_trim_tq != NULL) {
1435 while (ump->um_trim_inflight != 0)
1436 pause("ufsutr", hz);
1437 taskqueue_drain_all(ump->um_trim_tq);
1438 }
1439
1440 /*
1441 * Flush filesystem metadata.
1442 */
1443 vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY);
1444 error = VOP_FSYNC(ump->um_devvp, MNT_WAIT, td);
1445 VOP_UNLOCK(ump->um_devvp);
1446 return (error);
1447 }
1448
1449 /*
1450 * Get filesystem statistics.
1451 */
1452 static int
ffs_statfs(struct mount * mp,struct statfs * sbp)1453 ffs_statfs(struct mount *mp, struct statfs *sbp)
1454 {
1455 struct ufsmount *ump;
1456 struct fs *fs;
1457
1458 ump = VFSTOUFS(mp);
1459 fs = ump->um_fs;
1460 if (fs->fs_magic != FS_UFS1_MAGIC && fs->fs_magic != FS_UFS2_MAGIC)
1461 panic("ffs_statfs");
1462 sbp->f_version = STATFS_VERSION;
1463 sbp->f_bsize = fs->fs_fsize;
1464 sbp->f_iosize = fs->fs_bsize;
1465 sbp->f_blocks = fs->fs_dsize;
1466 UFS_LOCK(ump);
1467 sbp->f_bfree = fs->fs_cstotal.cs_nbfree * fs->fs_frag +
1468 fs->fs_cstotal.cs_nffree + dbtofsb(fs, fs->fs_pendingblocks);
1469 sbp->f_bavail = freespace(fs, fs->fs_minfree) +
1470 dbtofsb(fs, fs->fs_pendingblocks);
1471 sbp->f_files = fs->fs_ncg * fs->fs_ipg - UFS_ROOTINO;
1472 sbp->f_ffree = fs->fs_cstotal.cs_nifree + fs->fs_pendinginodes;
1473 UFS_UNLOCK(ump);
1474 sbp->f_namemax = UFS_MAXNAMLEN;
1475 return (0);
1476 }
1477
1478 static bool
sync_doupdate(struct inode * ip)1479 sync_doupdate(struct inode *ip)
1480 {
1481
1482 return ((ip->i_flag & (IN_ACCESS | IN_CHANGE | IN_MODIFIED |
1483 IN_UPDATE)) != 0);
1484 }
1485
1486 static int
ffs_sync_lazy_filter(struct vnode * vp,void * arg __unused)1487 ffs_sync_lazy_filter(struct vnode *vp, void *arg __unused)
1488 {
1489 struct inode *ip;
1490
1491 /*
1492 * Flags are safe to access because ->v_data invalidation
1493 * is held off by listmtx.
1494 */
1495 if (vp->v_type == VNON)
1496 return (false);
1497 ip = VTOI(vp);
1498 if (!sync_doupdate(ip) && (vp->v_iflag & VI_OWEINACT) == 0)
1499 return (false);
1500 return (true);
1501 }
1502
1503 /*
1504 * For a lazy sync, we only care about access times, quotas and the
1505 * superblock. Other filesystem changes are already converted to
1506 * cylinder group blocks or inode blocks updates and are written to
1507 * disk by syncer.
1508 */
1509 static int
ffs_sync_lazy(struct mount * mp)1510 ffs_sync_lazy(struct mount *mp)
1511 {
1512 struct vnode *mvp, *vp;
1513 struct inode *ip;
1514 int allerror, error;
1515
1516 allerror = 0;
1517 if ((mp->mnt_flag & MNT_NOATIME) != 0) {
1518 #ifdef QUOTA
1519 qsync(mp);
1520 #endif
1521 goto sbupdate;
1522 }
1523 MNT_VNODE_FOREACH_LAZY(vp, mp, mvp, ffs_sync_lazy_filter, NULL) {
1524 if (vp->v_type == VNON) {
1525 VI_UNLOCK(vp);
1526 continue;
1527 }
1528 ip = VTOI(vp);
1529
1530 /*
1531 * The IN_ACCESS flag is converted to IN_MODIFIED by
1532 * ufs_close() and ufs_getattr() by the calls to
1533 * ufs_itimes_locked(), without subsequent UFS_UPDATE().
1534 * Test also all the other timestamp flags too, to pick up
1535 * any other cases that could be missed.
1536 */
1537 if (!sync_doupdate(ip) && (vp->v_iflag & VI_OWEINACT) == 0) {
1538 VI_UNLOCK(vp);
1539 continue;
1540 }
1541 if ((error = vget(vp, LK_EXCLUSIVE | LK_NOWAIT | LK_INTERLOCK)) != 0)
1542 continue;
1543 #ifdef QUOTA
1544 qsyncvp(vp);
1545 #endif
1546 if (sync_doupdate(ip))
1547 error = ffs_update(vp, 0);
1548 if (error != 0)
1549 allerror = error;
1550 vput(vp);
1551 }
1552 sbupdate:
1553 if (VFSTOUFS(mp)->um_fs->fs_fmod != 0 &&
1554 (error = ffs_sbupdate(VFSTOUFS(mp), MNT_LAZY, 0)) != 0)
1555 allerror = error;
1556 return (allerror);
1557 }
1558
1559 /*
1560 * Go through the disk queues to initiate sandbagged IO;
1561 * go through the inodes to write those that have been modified;
1562 * initiate the writing of the super block if it has been modified.
1563 *
1564 * Note: we are always called with the filesystem marked busy using
1565 * vfs_busy().
1566 */
1567 static int
ffs_sync(struct mount * mp,int waitfor)1568 ffs_sync(struct mount *mp, int waitfor)
1569 {
1570 struct vnode *mvp, *vp, *devvp;
1571 struct thread *td;
1572 struct inode *ip;
1573 struct ufsmount *ump = VFSTOUFS(mp);
1574 struct fs *fs;
1575 int error, count, lockreq, allerror = 0;
1576 int suspend;
1577 int suspended;
1578 int secondary_writes;
1579 int secondary_accwrites;
1580 int softdep_deps;
1581 int softdep_accdeps;
1582 struct bufobj *bo;
1583
1584 suspend = 0;
1585 suspended = 0;
1586 td = curthread;
1587 fs = ump->um_fs;
1588 if (fs->fs_fmod != 0 && fs->fs_ronly != 0)
1589 panic("%s: ffs_sync: modification on read-only filesystem",
1590 fs->fs_fsmnt);
1591 if (waitfor == MNT_LAZY) {
1592 if (!rebooting)
1593 return (ffs_sync_lazy(mp));
1594 waitfor = MNT_NOWAIT;
1595 }
1596
1597 /*
1598 * Write back each (modified) inode.
1599 */
1600 lockreq = LK_EXCLUSIVE | LK_NOWAIT;
1601 if (waitfor == MNT_SUSPEND) {
1602 suspend = 1;
1603 waitfor = MNT_WAIT;
1604 }
1605 if (waitfor == MNT_WAIT)
1606 lockreq = LK_EXCLUSIVE;
1607 lockreq |= LK_INTERLOCK;
1608 loop:
1609 /* Grab snapshot of secondary write counts */
1610 MNT_ILOCK(mp);
1611 secondary_writes = mp->mnt_secondary_writes;
1612 secondary_accwrites = mp->mnt_secondary_accwrites;
1613 MNT_IUNLOCK(mp);
1614
1615 /* Grab snapshot of softdep dependency counts */
1616 softdep_get_depcounts(mp, &softdep_deps, &softdep_accdeps);
1617
1618 MNT_VNODE_FOREACH_ALL(vp, mp, mvp) {
1619 /*
1620 * Depend on the vnode interlock to keep things stable enough
1621 * for a quick test. Since there might be hundreds of
1622 * thousands of vnodes, we cannot afford even a subroutine
1623 * call unless there's a good chance that we have work to do.
1624 */
1625 if (vp->v_type == VNON) {
1626 VI_UNLOCK(vp);
1627 continue;
1628 }
1629 ip = VTOI(vp);
1630 if ((ip->i_flag &
1631 (IN_ACCESS | IN_CHANGE | IN_MODIFIED | IN_UPDATE)) == 0 &&
1632 vp->v_bufobj.bo_dirty.bv_cnt == 0) {
1633 VI_UNLOCK(vp);
1634 continue;
1635 }
1636 if ((error = vget(vp, lockreq)) != 0) {
1637 if (error == ENOENT) {
1638 MNT_VNODE_FOREACH_ALL_ABORT(mp, mvp);
1639 goto loop;
1640 }
1641 continue;
1642 }
1643 #ifdef QUOTA
1644 qsyncvp(vp);
1645 #endif
1646 for (;;) {
1647 error = ffs_syncvnode(vp, waitfor, 0);
1648 if (error == ERELOOKUP)
1649 continue;
1650 if (error != 0)
1651 allerror = error;
1652 break;
1653 }
1654 vput(vp);
1655 }
1656 /*
1657 * Force stale filesystem control information to be flushed.
1658 */
1659 if (waitfor == MNT_WAIT || rebooting) {
1660 if ((error = softdep_flushworklist(ump->um_mountp, &count, td)))
1661 allerror = error;
1662 if (ffs_fsfail_cleanup(ump, allerror))
1663 allerror = 0;
1664 /* Flushed work items may create new vnodes to clean */
1665 if (allerror == 0 && count)
1666 goto loop;
1667 }
1668
1669 devvp = ump->um_devvp;
1670 bo = &devvp->v_bufobj;
1671 BO_LOCK(bo);
1672 if (bo->bo_numoutput > 0 || bo->bo_dirty.bv_cnt > 0) {
1673 BO_UNLOCK(bo);
1674 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
1675 error = VOP_FSYNC(devvp, waitfor, td);
1676 VOP_UNLOCK(devvp);
1677 if (MOUNTEDSOFTDEP(mp) && (error == 0 || error == EAGAIN))
1678 error = ffs_sbupdate(ump, waitfor, 0);
1679 if (error != 0)
1680 allerror = error;
1681 if (ffs_fsfail_cleanup(ump, allerror))
1682 allerror = 0;
1683 if (allerror == 0 && waitfor == MNT_WAIT)
1684 goto loop;
1685 } else if (suspend != 0) {
1686 if (softdep_check_suspend(mp,
1687 devvp,
1688 softdep_deps,
1689 softdep_accdeps,
1690 secondary_writes,
1691 secondary_accwrites) != 0) {
1692 MNT_IUNLOCK(mp);
1693 goto loop; /* More work needed */
1694 }
1695 mtx_assert(MNT_MTX(mp), MA_OWNED);
1696 mp->mnt_kern_flag |= MNTK_SUSPEND2 | MNTK_SUSPENDED;
1697 MNT_IUNLOCK(mp);
1698 suspended = 1;
1699 } else
1700 BO_UNLOCK(bo);
1701 /*
1702 * Write back modified superblock.
1703 */
1704 if (fs->fs_fmod != 0 &&
1705 (error = ffs_sbupdate(ump, waitfor, suspended)) != 0)
1706 allerror = error;
1707 if (ffs_fsfail_cleanup(ump, allerror))
1708 allerror = 0;
1709 return (allerror);
1710 }
1711
1712 int
ffs_vget(struct mount * mp,ino_t ino,int flags,struct vnode ** vpp)1713 ffs_vget(struct mount *mp, ino_t ino, int flags, struct vnode **vpp)
1714 {
1715 return (ffs_vgetf(mp, ino, flags, vpp, 0));
1716 }
1717
1718 int
ffs_vgetf(struct mount * mp,ino_t ino,int flags,struct vnode ** vpp,int ffs_flags)1719 ffs_vgetf(struct mount *mp,
1720 ino_t ino,
1721 int flags,
1722 struct vnode **vpp,
1723 int ffs_flags)
1724 {
1725 struct fs *fs;
1726 struct inode *ip;
1727 struct ufsmount *ump;
1728 struct buf *bp;
1729 struct vnode *vp;
1730 daddr_t dbn;
1731 int error;
1732
1733 MPASS((ffs_flags & (FFSV_REPLACE | FFSV_REPLACE_DOOMED)) == 0 ||
1734 (flags & LK_EXCLUSIVE) != 0);
1735
1736 error = vfs_hash_get(mp, ino, flags, curthread, vpp, NULL, NULL);
1737 if (error != 0)
1738 return (error);
1739 if (*vpp != NULL) {
1740 if ((ffs_flags & FFSV_REPLACE) == 0 ||
1741 ((ffs_flags & FFSV_REPLACE_DOOMED) == 0 ||
1742 !VN_IS_DOOMED(*vpp)))
1743 return (0);
1744 vgone(*vpp);
1745 vput(*vpp);
1746 }
1747
1748 /*
1749 * We must promote to an exclusive lock for vnode creation. This
1750 * can happen if lookup is passed LOCKSHARED.
1751 */
1752 if ((flags & LK_TYPE_MASK) == LK_SHARED) {
1753 flags &= ~LK_TYPE_MASK;
1754 flags |= LK_EXCLUSIVE;
1755 }
1756
1757 /*
1758 * We do not lock vnode creation as it is believed to be too
1759 * expensive for such rare case as simultaneous creation of vnode
1760 * for same ino by different processes. We just allow them to race
1761 * and check later to decide who wins. Let the race begin!
1762 */
1763
1764 ump = VFSTOUFS(mp);
1765 fs = ump->um_fs;
1766 ip = uma_zalloc_smr(uma_inode, M_WAITOK | M_ZERO);
1767
1768 /* Allocate a new vnode/inode. */
1769 error = getnewvnode("ufs", mp, fs->fs_magic == FS_UFS1_MAGIC ?
1770 &ffs_vnodeops1 : &ffs_vnodeops2, &vp);
1771 if (error) {
1772 *vpp = NULL;
1773 uma_zfree_smr(uma_inode, ip);
1774 return (error);
1775 }
1776 /*
1777 * FFS supports recursive locking.
1778 */
1779 lockmgr(vp->v_vnlock, LK_EXCLUSIVE | LK_NOWITNESS, NULL);
1780 VN_LOCK_AREC(vp);
1781 vp->v_data = ip;
1782 vp->v_bufobj.bo_bsize = fs->fs_bsize;
1783 ip->i_vnode = vp;
1784 ip->i_ump = ump;
1785 ip->i_number = ino;
1786 ip->i_ea_refs = 0;
1787 ip->i_nextclustercg = -1;
1788 ip->i_flag = fs->fs_magic == FS_UFS1_MAGIC ? 0 : IN_UFS2;
1789 ip->i_mode = 0; /* ensure error cases below throw away vnode */
1790 cluster_init_vn(&ip->i_clusterw);
1791 #ifdef DIAGNOSTIC
1792 ufs_init_trackers(ip);
1793 #endif
1794 #ifdef QUOTA
1795 {
1796 int i;
1797 for (i = 0; i < MAXQUOTAS; i++)
1798 ip->i_dquot[i] = NODQUOT;
1799 }
1800 #endif
1801
1802 if (ffs_flags & FFSV_FORCEINSMQ)
1803 vp->v_vflag |= VV_FORCEINSMQ;
1804 error = insmntque(vp, mp);
1805 if (error != 0) {
1806 uma_zfree_smr(uma_inode, ip);
1807 *vpp = NULL;
1808 return (error);
1809 }
1810 vp->v_vflag &= ~VV_FORCEINSMQ;
1811 error = vfs_hash_insert(vp, ino, flags, curthread, vpp, NULL, NULL);
1812 if (error != 0)
1813 return (error);
1814 if (*vpp != NULL) {
1815 /*
1816 * Calls from ffs_valloc() (i.e. FFSV_REPLACE set)
1817 * operate on empty inode, which must not be found by
1818 * other threads until fully filled. Vnode for empty
1819 * inode must be not re-inserted on the hash by other
1820 * thread, after removal by us at the beginning.
1821 */
1822 MPASS((ffs_flags & FFSV_REPLACE) == 0);
1823 return (0);
1824 }
1825 if (I_IS_UFS1(ip))
1826 ip->i_din1 = uma_zalloc(uma_ufs1, M_WAITOK);
1827 else
1828 ip->i_din2 = uma_zalloc(uma_ufs2, M_WAITOK);
1829
1830 if ((ffs_flags & FFSV_NEWINODE) != 0) {
1831 /* New inode, just zero out its contents. */
1832 if (I_IS_UFS1(ip))
1833 memset(ip->i_din1, 0, sizeof(struct ufs1_dinode));
1834 else
1835 memset(ip->i_din2, 0, sizeof(struct ufs2_dinode));
1836 } else {
1837 /* Read the disk contents for the inode, copy into the inode. */
1838 dbn = fsbtodb(fs, ino_to_fsba(fs, ino));
1839 error = ffs_breadz(ump, ump->um_devvp, dbn, dbn,
1840 (int)fs->fs_bsize, NULL, NULL, 0, NOCRED, 0, NULL, &bp);
1841 if (error != 0) {
1842 /*
1843 * The inode does not contain anything useful, so it
1844 * would be misleading to leave it on its hash chain.
1845 * With mode still zero, it will be unlinked and
1846 * returned to the free list by vput().
1847 */
1848 vgone(vp);
1849 vput(vp);
1850 *vpp = NULL;
1851 return (error);
1852 }
1853 if ((error = ffs_load_inode(bp, ip, fs, ino)) != 0) {
1854 bqrelse(bp);
1855 vgone(vp);
1856 vput(vp);
1857 *vpp = NULL;
1858 return (error);
1859 }
1860 bqrelse(bp);
1861 }
1862 if (DOINGSOFTDEP(vp) && (!fs->fs_ronly ||
1863 (ffs_flags & FFSV_FORCEINODEDEP) != 0))
1864 softdep_load_inodeblock(ip);
1865 else
1866 ip->i_effnlink = ip->i_nlink;
1867
1868 /*
1869 * Initialize the vnode from the inode, check for aliases.
1870 * Note that the underlying vnode may have changed.
1871 */
1872 error = ufs_vinit(mp, I_IS_UFS1(ip) ? &ffs_fifoops1 : &ffs_fifoops2,
1873 &vp);
1874 if (error) {
1875 vgone(vp);
1876 vput(vp);
1877 *vpp = NULL;
1878 return (error);
1879 }
1880
1881 /*
1882 * Finish inode initialization.
1883 */
1884 if (vp->v_type != VFIFO) {
1885 /* FFS supports shared locking for all files except fifos. */
1886 VN_LOCK_ASHARE(vp);
1887 }
1888
1889 /*
1890 * Set up a generation number for this inode if it does not
1891 * already have one. This should only happen on old filesystems.
1892 */
1893 if (ip->i_gen == 0) {
1894 while (ip->i_gen == 0)
1895 ip->i_gen = arc4random();
1896 if ((vp->v_mount->mnt_flag & MNT_RDONLY) == 0) {
1897 UFS_INODE_SET_FLAG(ip, IN_MODIFIED);
1898 DIP_SET(ip, i_gen, ip->i_gen);
1899 }
1900 }
1901 #ifdef MAC
1902 if ((mp->mnt_flag & MNT_MULTILABEL) && ip->i_mode) {
1903 /*
1904 * If this vnode is already allocated, and we're running
1905 * multi-label, attempt to perform a label association
1906 * from the extended attributes on the inode.
1907 */
1908 error = mac_vnode_associate_extattr(mp, vp);
1909 if (error) {
1910 /* ufs_inactive will release ip->i_devvp ref. */
1911 vgone(vp);
1912 vput(vp);
1913 *vpp = NULL;
1914 return (error);
1915 }
1916 }
1917 #endif
1918
1919 vn_set_state(vp, VSTATE_CONSTRUCTED);
1920 *vpp = vp;
1921 return (0);
1922 }
1923
1924 /*
1925 * File handle to vnode
1926 *
1927 * Have to be really careful about stale file handles:
1928 * - check that the inode number is valid
1929 * - for UFS2 check that the inode number is initialized
1930 * - call ffs_vget() to get the locked inode
1931 * - check for an unallocated inode (i_mode == 0)
1932 * - check that the given client host has export rights and return
1933 * those rights via. exflagsp and credanonp
1934 */
1935 static int
ffs_fhtovp(struct mount * mp,struct fid * fhp,int flags,struct vnode ** vpp)1936 ffs_fhtovp(struct mount *mp, struct fid *fhp, int flags, struct vnode **vpp)
1937 {
1938 struct ufid *ufhp;
1939
1940 ufhp = (struct ufid *)fhp;
1941 return (ffs_inotovp(mp, ufhp->ufid_ino, ufhp->ufid_gen, flags,
1942 vpp, 0));
1943 }
1944
1945 /*
1946 * Return a vnode from a mounted filesystem for inode with specified
1947 * generation number. Return ESTALE if the inode with given generation
1948 * number no longer exists on that filesystem.
1949 */
1950 int
ffs_inotovp(struct mount * mp,ino_t ino,uint64_t gen,int lflags,struct vnode ** vpp,int ffs_flags)1951 ffs_inotovp(struct mount *mp,
1952 ino_t ino,
1953 uint64_t gen,
1954 int lflags,
1955 struct vnode **vpp,
1956 int ffs_flags)
1957 {
1958 struct ufsmount *ump;
1959 struct vnode *nvp;
1960 struct inode *ip;
1961 struct fs *fs;
1962 struct cg *cgp;
1963 struct buf *bp;
1964 uint64_t cg;
1965
1966 ump = VFSTOUFS(mp);
1967 fs = ump->um_fs;
1968 *vpp = NULL;
1969
1970 if (ino < UFS_ROOTINO || ino >= fs->fs_ncg * fs->fs_ipg)
1971 return (ESTALE);
1972
1973 /*
1974 * Need to check if inode is initialized because UFS2 does lazy
1975 * initialization and nfs_fhtovp can offer arbitrary inode numbers.
1976 */
1977 if (fs->fs_magic == FS_UFS2_MAGIC) {
1978 cg = ino_to_cg(fs, ino);
1979 if (ffs_getcg(fs, ump->um_devvp, cg, 0, &bp, &cgp) != 0)
1980 return (ESTALE);
1981 if (ino >= cg * fs->fs_ipg + cgp->cg_initediblk) {
1982 brelse(bp);
1983 return (ESTALE);
1984 }
1985 brelse(bp);
1986 }
1987
1988 if (ffs_vgetf(mp, ino, lflags, &nvp, ffs_flags) != 0)
1989 return (ESTALE);
1990
1991 ip = VTOI(nvp);
1992 if (ip->i_mode == 0 || ip->i_gen != gen) {
1993 if (ip->i_mode == 0)
1994 vgone(nvp);
1995 vput(nvp);
1996 return (ESTALE);
1997 }
1998
1999 vnode_create_vobject(nvp, DIP(ip, i_size), curthread);
2000 *vpp = nvp;
2001 return (0);
2002 }
2003
2004 /*
2005 * Initialize the filesystem.
2006 */
2007 static int
ffs_init(struct vfsconf * vfsp)2008 ffs_init(struct vfsconf *vfsp)
2009 {
2010
2011 ffs_susp_initialize();
2012 softdep_initialize();
2013 return (ufs_init(vfsp));
2014 }
2015
2016 /*
2017 * Undo the work of ffs_init().
2018 */
2019 static int
ffs_uninit(struct vfsconf * vfsp)2020 ffs_uninit(struct vfsconf *vfsp)
2021 {
2022 int ret;
2023
2024 ret = ufs_uninit(vfsp);
2025 softdep_uninitialize();
2026 ffs_susp_uninitialize();
2027 taskqueue_drain_all(taskqueue_thread);
2028 return (ret);
2029 }
2030
2031 /*
2032 * Structure used to pass information from ffs_sbupdate to its
2033 * helper routine ffs_use_bwrite.
2034 */
2035 struct devfd {
2036 struct ufsmount *ump;
2037 struct buf *sbbp;
2038 int waitfor;
2039 int suspended;
2040 int error;
2041 };
2042
2043 /*
2044 * Write a superblock and associated information back to disk.
2045 */
2046 int
ffs_sbupdate(struct ufsmount * ump,int waitfor,int suspended)2047 ffs_sbupdate(struct ufsmount *ump, int waitfor, int suspended)
2048 {
2049 struct fs *fs;
2050 struct buf *sbbp;
2051 struct devfd devfd;
2052
2053 fs = ump->um_fs;
2054 if (fs->fs_ronly == 1 &&
2055 (ump->um_mountp->mnt_flag & (MNT_RDONLY | MNT_UPDATE)) !=
2056 (MNT_RDONLY | MNT_UPDATE))
2057 panic("ffs_sbupdate: write read-only filesystem");
2058 /*
2059 * We use the superblock's buf to serialize calls to ffs_sbupdate().
2060 * Copy superblock to this buffer and have it written out.
2061 */
2062 sbbp = getblk(ump->um_devvp, btodb(fs->fs_sblockloc),
2063 (int)fs->fs_sbsize, 0, 0, 0);
2064 UFS_LOCK(ump);
2065 fs->fs_fmod = 0;
2066 bcopy((caddr_t)fs, sbbp->b_data, (uint64_t)fs->fs_sbsize);
2067 UFS_UNLOCK(ump);
2068 fs = (struct fs *)sbbp->b_data;
2069 /*
2070 * Initialize info needed for write function.
2071 */
2072 devfd.ump = ump;
2073 devfd.sbbp = sbbp;
2074 devfd.waitfor = waitfor;
2075 devfd.suspended = suspended;
2076 devfd.error = 0;
2077 return (ffs_sbput(&devfd, fs, fs->fs_sblockloc, ffs_use_bwrite));
2078 }
2079
2080 /*
2081 * Write function for use by filesystem-layer routines.
2082 */
2083 static int
ffs_use_bwrite(void * devfd,off_t loc,void * buf,int size)2084 ffs_use_bwrite(void *devfd, off_t loc, void *buf, int size)
2085 {
2086 struct devfd *devfdp;
2087 struct ufsmount *ump;
2088 struct buf *bp;
2089 struct fs *fs;
2090 int error;
2091
2092 devfdp = devfd;
2093 ump = devfdp->ump;
2094 bp = devfdp->sbbp;
2095 fs = (struct fs *)bp->b_data;
2096 /*
2097 * Writing the superblock summary information.
2098 */
2099 if (loc != fs->fs_sblockloc) {
2100 bp = getblk(ump->um_devvp, btodb(loc), size, 0, 0, 0);
2101 bcopy(buf, bp->b_data, (uint64_t)size);
2102 if (devfdp->suspended)
2103 bp->b_flags |= B_VALIDSUSPWRT;
2104 if (devfdp->waitfor != MNT_WAIT)
2105 bawrite(bp);
2106 else if ((error = bwrite(bp)) != 0)
2107 devfdp->error = error;
2108 return (0);
2109 }
2110 /*
2111 * Writing the superblock itself. We need to do special checks for it.
2112 * A negative error code is returned to indicate that a copy of the
2113 * superblock has been made and that the copy is discarded when the
2114 * I/O is done. So the caller should not attempt to restore the
2115 * fs_si field after the write is done. The caller will convert the
2116 * error code back to its usual positive value when returning it.
2117 */
2118 if (ffs_fsfail_cleanup(ump, devfdp->error))
2119 devfdp->error = 0;
2120 if (devfdp->error != 0) {
2121 brelse(bp);
2122 return (-devfdp->error - 1);
2123 }
2124 if (MOUNTEDSOFTDEP(ump->um_mountp))
2125 softdep_setup_sbupdate(ump, fs, bp);
2126 if (devfdp->suspended)
2127 bp->b_flags |= B_VALIDSUSPWRT;
2128 if (devfdp->waitfor != MNT_WAIT)
2129 bawrite(bp);
2130 else if ((error = bwrite(bp)) != 0)
2131 devfdp->error = error;
2132 return (-devfdp->error - 1);
2133 }
2134
2135 static int
ffs_extattrctl(struct mount * mp,int cmd,struct vnode * filename_vp,int attrnamespace,const char * attrname)2136 ffs_extattrctl(struct mount *mp, int cmd, struct vnode *filename_vp,
2137 int attrnamespace, const char *attrname)
2138 {
2139
2140 #ifdef UFS_EXTATTR
2141 return (ufs_extattrctl(mp, cmd, filename_vp, attrnamespace,
2142 attrname));
2143 #else
2144 return (vfs_stdextattrctl(mp, cmd, filename_vp, attrnamespace,
2145 attrname));
2146 #endif
2147 }
2148
2149 static void
ffs_ifree(struct ufsmount * ump,struct inode * ip)2150 ffs_ifree(struct ufsmount *ump, struct inode *ip)
2151 {
2152
2153 if (ump->um_fstype == UFS1 && ip->i_din1 != NULL)
2154 uma_zfree(uma_ufs1, ip->i_din1);
2155 else if (ip->i_din2 != NULL)
2156 uma_zfree(uma_ufs2, ip->i_din2);
2157 uma_zfree_smr(uma_inode, ip);
2158 }
2159
2160 static int dobkgrdwrite = 1;
2161 SYSCTL_INT(_debug, OID_AUTO, dobkgrdwrite, CTLFLAG_RW, &dobkgrdwrite, 0,
2162 "Do background writes (honoring the BV_BKGRDWRITE flag)?");
2163
2164 /*
2165 * Complete a background write started from bwrite.
2166 */
2167 static void
ffs_backgroundwritedone(struct buf * bp)2168 ffs_backgroundwritedone(struct buf *bp)
2169 {
2170 struct bufobj *bufobj;
2171 struct buf *origbp;
2172
2173 #ifdef SOFTUPDATES
2174 if (!LIST_EMPTY(&bp->b_dep) && (bp->b_ioflags & BIO_ERROR) != 0)
2175 softdep_handle_error(bp);
2176 #endif
2177
2178 /*
2179 * Find the original buffer that we are writing.
2180 */
2181 bufobj = bp->b_bufobj;
2182 BO_LOCK(bufobj);
2183 if ((origbp = gbincore(bp->b_bufobj, bp->b_lblkno)) == NULL)
2184 panic("backgroundwritedone: lost buffer");
2185
2186 /*
2187 * We should mark the cylinder group buffer origbp as
2188 * dirty, to not lose the failed write.
2189 */
2190 if ((bp->b_ioflags & BIO_ERROR) != 0)
2191 origbp->b_vflags |= BV_BKGRDERR;
2192 BO_UNLOCK(bufobj);
2193 /*
2194 * Process dependencies then return any unfinished ones.
2195 */
2196 if (!LIST_EMPTY(&bp->b_dep) && (bp->b_ioflags & BIO_ERROR) == 0)
2197 buf_complete(bp);
2198 #ifdef SOFTUPDATES
2199 if (!LIST_EMPTY(&bp->b_dep))
2200 softdep_move_dependencies(bp, origbp);
2201 #endif
2202 /*
2203 * This buffer is marked B_NOCACHE so when it is released
2204 * by biodone it will be tossed. Clear B_IOSTARTED in case of error.
2205 */
2206 bp->b_flags |= B_NOCACHE;
2207 bp->b_flags &= ~(B_CACHE | B_IOSTARTED);
2208 pbrelvp(bp);
2209
2210 /*
2211 * Prevent brelse() from trying to keep and re-dirtying bp on
2212 * errors. It causes b_bufobj dereference in
2213 * bdirty()/reassignbuf(), and b_bufobj was cleared in
2214 * pbrelvp() above.
2215 */
2216 if ((bp->b_ioflags & BIO_ERROR) != 0)
2217 bp->b_flags |= B_INVAL;
2218 bufdone(bp);
2219 BO_LOCK(bufobj);
2220 /*
2221 * Clear the BV_BKGRDINPROG flag in the original buffer
2222 * and awaken it if it is waiting for the write to complete.
2223 * If BV_BKGRDINPROG is not set in the original buffer it must
2224 * have been released and re-instantiated - which is not legal.
2225 */
2226 KASSERT((origbp->b_vflags & BV_BKGRDINPROG),
2227 ("backgroundwritedone: lost buffer2"));
2228 origbp->b_vflags &= ~BV_BKGRDINPROG;
2229 if (origbp->b_vflags & BV_BKGRDWAIT) {
2230 origbp->b_vflags &= ~BV_BKGRDWAIT;
2231 wakeup(&origbp->b_xflags);
2232 }
2233 BO_UNLOCK(bufobj);
2234 }
2235
2236 /*
2237 * Write, release buffer on completion. (Done by iodone
2238 * if async). Do not bother writing anything if the buffer
2239 * is invalid.
2240 *
2241 * Note that we set B_CACHE here, indicating that buffer is
2242 * fully valid and thus cacheable. This is true even of NFS
2243 * now so we set it generally. This could be set either here
2244 * or in biodone() since the I/O is synchronous. We put it
2245 * here.
2246 */
2247 static int
ffs_bufwrite(struct buf * bp)2248 ffs_bufwrite(struct buf *bp)
2249 {
2250 struct buf *newbp;
2251 struct cg *cgp;
2252
2253 CTR3(KTR_BUF, "bufwrite(%p) vp %p flags %X", bp, bp->b_vp, bp->b_flags);
2254 if (bp->b_flags & B_INVAL) {
2255 brelse(bp);
2256 return (0);
2257 }
2258
2259 if (!BUF_ISLOCKED(bp))
2260 panic("bufwrite: buffer is not busy???");
2261 /*
2262 * If a background write is already in progress, delay
2263 * writing this block if it is asynchronous. Otherwise
2264 * wait for the background write to complete.
2265 */
2266 BO_LOCK(bp->b_bufobj);
2267 if (bp->b_vflags & BV_BKGRDINPROG) {
2268 if (bp->b_flags & B_ASYNC) {
2269 BO_UNLOCK(bp->b_bufobj);
2270 bdwrite(bp);
2271 return (0);
2272 }
2273 bp->b_vflags |= BV_BKGRDWAIT;
2274 msleep(&bp->b_xflags, BO_LOCKPTR(bp->b_bufobj), PRIBIO,
2275 "bwrbg", 0);
2276 if (bp->b_vflags & BV_BKGRDINPROG)
2277 panic("bufwrite: still writing");
2278 }
2279 bp->b_vflags &= ~BV_BKGRDERR;
2280 BO_UNLOCK(bp->b_bufobj);
2281
2282 /*
2283 * If this buffer is marked for background writing and we
2284 * do not have to wait for it, make a copy and write the
2285 * copy so as to leave this buffer ready for further use.
2286 *
2287 * This optimization eats a lot of memory. If we have a page
2288 * or buffer shortfall we can't do it.
2289 */
2290 if (dobkgrdwrite && (bp->b_xflags & BX_BKGRDWRITE) &&
2291 (bp->b_flags & B_ASYNC) &&
2292 !vm_page_count_severe() &&
2293 !buf_dirty_count_severe()) {
2294 KASSERT(bp->b_iodone == NULL,
2295 ("bufwrite: needs chained iodone (%p)", bp->b_iodone));
2296
2297 /* get a new block */
2298 newbp = geteblk(bp->b_bufsize, GB_NOWAIT_BD);
2299 if (newbp == NULL)
2300 goto normal_write;
2301
2302 KASSERT(buf_mapped(bp), ("Unmapped cg"));
2303 memcpy(newbp->b_data, bp->b_data, bp->b_bufsize);
2304 BO_LOCK(bp->b_bufobj);
2305 bp->b_vflags |= BV_BKGRDINPROG;
2306 BO_UNLOCK(bp->b_bufobj);
2307 newbp->b_xflags |=
2308 (bp->b_xflags & BX_FSPRIV) | BX_BKGRDMARKER;
2309 newbp->b_lblkno = bp->b_lblkno;
2310 newbp->b_blkno = bp->b_blkno;
2311 newbp->b_offset = bp->b_offset;
2312 newbp->b_iodone = ffs_backgroundwritedone;
2313 newbp->b_flags |= B_ASYNC;
2314 newbp->b_flags &= ~B_INVAL;
2315 pbgetvp(bp->b_vp, newbp);
2316
2317 #ifdef SOFTUPDATES
2318 /*
2319 * Move over the dependencies. If there are rollbacks,
2320 * leave the parent buffer dirtied as it will need to
2321 * be written again.
2322 */
2323 if (LIST_EMPTY(&bp->b_dep) ||
2324 softdep_move_dependencies(bp, newbp) == 0)
2325 bundirty(bp);
2326 #else
2327 bundirty(bp);
2328 #endif
2329
2330 /*
2331 * Initiate write on the copy, release the original. The
2332 * BKGRDINPROG flag prevents it from going away until
2333 * the background write completes. We have to recalculate
2334 * its check hash in case the buffer gets freed and then
2335 * reconstituted from the buffer cache during a later read.
2336 */
2337 if ((bp->b_xflags & BX_CYLGRP) != 0) {
2338 cgp = (struct cg *)bp->b_data;
2339 cgp->cg_ckhash = 0;
2340 cgp->cg_ckhash =
2341 calculate_crc32c(~0L, bp->b_data, bp->b_bcount);
2342 }
2343 bqrelse(bp);
2344 bp = newbp;
2345 } else
2346 /* Mark the buffer clean */
2347 bundirty(bp);
2348
2349 /* Let the normal bufwrite do the rest for us */
2350 normal_write:
2351 /*
2352 * If we are writing a cylinder group, update its time.
2353 */
2354 if ((bp->b_xflags & BX_CYLGRP) != 0) {
2355 cgp = (struct cg *)bp->b_data;
2356 cgp->cg_old_time = cgp->cg_time = time_second;
2357 }
2358 return (bufwrite(bp));
2359 }
2360
2361 static void
ffs_geom_strategy(struct bufobj * bo,struct buf * bp)2362 ffs_geom_strategy(struct bufobj *bo, struct buf *bp)
2363 {
2364 struct vnode *vp;
2365 struct buf *tbp;
2366 int error, nocopy;
2367
2368 /*
2369 * This is the bufobj strategy for the private VCHR vnodes
2370 * used by FFS to access the underlying storage device.
2371 * We override the default bufobj strategy and thus bypass
2372 * VOP_STRATEGY() for these vnodes.
2373 */
2374 vp = bo2vnode(bo);
2375 KASSERT(bp->b_vp == NULL || bp->b_vp->v_type != VCHR ||
2376 bp->b_vp->v_rdev == NULL ||
2377 bp->b_vp->v_rdev->si_mountpt == NULL ||
2378 VFSTOUFS(bp->b_vp->v_rdev->si_mountpt) == NULL ||
2379 vp == VFSTOUFS(bp->b_vp->v_rdev->si_mountpt)->um_devvp,
2380 ("ffs_geom_strategy() with wrong vp"));
2381 if (bp->b_iocmd == BIO_WRITE) {
2382 if ((bp->b_flags & B_VALIDSUSPWRT) == 0 &&
2383 bp->b_vp != NULL && bp->b_vp->v_mount != NULL &&
2384 (bp->b_vp->v_mount->mnt_kern_flag & MNTK_SUSPENDED) != 0)
2385 panic("ffs_geom_strategy: bad I/O");
2386 nocopy = bp->b_flags & B_NOCOPY;
2387 bp->b_flags &= ~(B_VALIDSUSPWRT | B_NOCOPY);
2388 if ((vp->v_vflag & VV_COPYONWRITE) && nocopy == 0 &&
2389 vp->v_rdev->si_snapdata != NULL) {
2390 if ((bp->b_flags & B_CLUSTER) != 0) {
2391 runningbufwakeup(bp);
2392 TAILQ_FOREACH(tbp, &bp->b_cluster.cluster_head,
2393 b_cluster.cluster_entry) {
2394 error = ffs_copyonwrite(vp, tbp);
2395 if (error != 0 &&
2396 error != EOPNOTSUPP) {
2397 bp->b_error = error;
2398 bp->b_ioflags |= BIO_ERROR;
2399 bp->b_flags &= ~B_BARRIER;
2400 bufdone(bp);
2401 return;
2402 }
2403 }
2404 (void)runningbufclaim(bp, bp->b_bufsize);
2405 } else {
2406 error = ffs_copyonwrite(vp, bp);
2407 if (error != 0 && error != EOPNOTSUPP) {
2408 bp->b_error = error;
2409 bp->b_ioflags |= BIO_ERROR;
2410 bp->b_flags &= ~B_BARRIER;
2411 bufdone(bp);
2412 return;
2413 }
2414 }
2415 }
2416 #ifdef SOFTUPDATES
2417 if ((bp->b_flags & B_CLUSTER) != 0) {
2418 TAILQ_FOREACH(tbp, &bp->b_cluster.cluster_head,
2419 b_cluster.cluster_entry) {
2420 if (!LIST_EMPTY(&tbp->b_dep))
2421 buf_start(tbp);
2422 }
2423 } else {
2424 if (!LIST_EMPTY(&bp->b_dep))
2425 buf_start(bp);
2426 }
2427
2428 #endif
2429 /*
2430 * Check for metadata that needs check-hashes and update them.
2431 */
2432 switch (bp->b_xflags & BX_FSPRIV) {
2433 case BX_CYLGRP:
2434 ((struct cg *)bp->b_data)->cg_ckhash = 0;
2435 ((struct cg *)bp->b_data)->cg_ckhash =
2436 calculate_crc32c(~0L, bp->b_data, bp->b_bcount);
2437 break;
2438
2439 case BX_SUPERBLOCK:
2440 case BX_INODE:
2441 case BX_INDIR:
2442 case BX_DIR:
2443 printf("Check-hash write is unimplemented!!!\n");
2444 break;
2445
2446 case 0:
2447 break;
2448
2449 default:
2450 printf("multiple buffer types 0x%b\n",
2451 (bp->b_xflags & BX_FSPRIV), PRINT_UFS_BUF_XFLAGS);
2452 break;
2453 }
2454 }
2455 if (bp->b_iocmd != BIO_READ && ffs_enxio_enable)
2456 bp->b_xflags |= BX_CVTENXIO;
2457 g_vfs_strategy(bo, bp);
2458 }
2459
2460 int
ffs_own_mount(const struct mount * mp)2461 ffs_own_mount(const struct mount *mp)
2462 {
2463
2464 if (mp->mnt_op == &ufs_vfsops)
2465 return (1);
2466 return (0);
2467 }
2468
2469 #ifdef DDB
2470 #ifdef SOFTUPDATES
2471
2472 /* defined in ffs_softdep.c */
2473 extern void db_print_ffs(struct ufsmount *ump);
2474
DB_SHOW_COMMAND(ffs,db_show_ffs)2475 DB_SHOW_COMMAND(ffs, db_show_ffs)
2476 {
2477 struct mount *mp;
2478 struct ufsmount *ump;
2479
2480 if (have_addr) {
2481 ump = VFSTOUFS((struct mount *)addr);
2482 db_print_ffs(ump);
2483 return;
2484 }
2485
2486 TAILQ_FOREACH(mp, &mountlist, mnt_list) {
2487 if (!strcmp(mp->mnt_stat.f_fstypename, ufs_vfsconf.vfc_name))
2488 db_print_ffs(VFSTOUFS(mp));
2489 }
2490 }
2491
2492 #endif /* SOFTUPDATES */
2493 #endif /* DDB */
2494