1 /*
2 * XFS filesystem operations.
3 *
4 * Copyright (c) 2000-2004 Silicon Graphics, Inc. All Rights Reserved.
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of version 2 of the GNU General Public License as
8 * published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope that it would be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
13 *
14 * Further, this software is distributed without any warranty that it is
15 * free of the rightful claim of any third person regarding infringement
16 * or the like. Any license provided herein, whether implied or
17 * otherwise, applies only to this software file. Patent licenses, if
18 * any, provided herein do not apply to combinations of this program with
19 * other software, or any other product whatsoever.
20 *
21 * You should have received a copy of the GNU General Public License along
22 * with this program; if not, write the Free Software Foundation, Inc., 59
23 * Temple Place - Suite 330, Boston MA 02111-1307, USA.
24 *
25 * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
26 * Mountain View, CA 94043, or:
27 *
28 * http://www.sgi.com
29 *
30 * For further information regarding this notice, see:
31 *
32 * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
33 */
34
35 #include "xfs.h"
36 #include "xfs_macros.h"
37 #include "xfs_types.h"
38 #include "xfs_inum.h"
39 #include "xfs_log.h"
40 #include "xfs_trans.h"
41 #include "xfs_sb.h"
42 #include "xfs_dir.h"
43 #include "xfs_dir2.h"
44 #include "xfs_dmapi.h"
45 #include "xfs_mount.h"
46 #include "xfs_bmap_btree.h"
47 #include "xfs_ialloc_btree.h"
48 #include "xfs_alloc_btree.h"
49 #include "xfs_btree.h"
50 #include "xfs_alloc.h"
51 #include "xfs_ialloc.h"
52 #include "xfs_attr_sf.h"
53 #include "xfs_dir_sf.h"
54 #include "xfs_dir2_sf.h"
55 #include "xfs_dinode.h"
56 #include "xfs_inode_item.h"
57 #include "xfs_inode.h"
58 #include "xfs_ag.h"
59 #include "xfs_error.h"
60 #include "xfs_bmap.h"
61 #include "xfs_da_btree.h"
62 #include "xfs_rw.h"
63 #include "xfs_refcache.h"
64 #include "xfs_buf_item.h"
65 #include "xfs_extfree_item.h"
66 #include "xfs_quota.h"
67 #include "xfs_dir2_trace.h"
68 #include "xfs_acl.h"
69 #include "xfs_attr.h"
70 #include "xfs_clnt.h"
71 #include "xfs_log_priv.h"
72
73 STATIC int xfs_sync(bhv_desc_t *, int, cred_t *);
74
75 int
76 xfs_init(void)
77 {
78 extern kmem_zone_t *xfs_bmap_free_item_zone;
79 extern kmem_zone_t *xfs_btree_cur_zone;
80 extern kmem_zone_t *xfs_trans_zone;
81 extern kmem_zone_t *xfs_buf_item_zone;
82 extern kmem_zone_t *xfs_dabuf_zone;
83 #ifdef XFS_DABUF_DEBUG
84 extern lock_t xfs_dabuf_global_lock;
85 spinlock_init(&xfs_dabuf_global_lock, "xfsda");
86 #endif
87
88 /*
89 * Initialize all of the zone allocators we use.
90 */
91 xfs_bmap_free_item_zone = kmem_zone_init(sizeof(xfs_bmap_free_item_t),
92 "xfs_bmap_free_item");
93 xfs_btree_cur_zone = kmem_zone_init(sizeof(xfs_btree_cur_t),
94 "xfs_btree_cur");
95 xfs_inode_zone = kmem_zone_init(sizeof(xfs_inode_t), "xfs_inode");
96 xfs_trans_zone = kmem_zone_init(sizeof(xfs_trans_t), "xfs_trans");
97 xfs_da_state_zone =
98 kmem_zone_init(sizeof(xfs_da_state_t), "xfs_da_state");
99 xfs_dabuf_zone = kmem_zone_init(sizeof(xfs_dabuf_t), "xfs_dabuf");
100
101 /*
102 * The size of the zone allocated buf log item is the maximum
103 * size possible under XFS. This wastes a little bit of memory,
104 * but it is much faster.
105 */
106 xfs_buf_item_zone =
107 kmem_zone_init((sizeof(xfs_buf_log_item_t) +
108 (((XFS_MAX_BLOCKSIZE / XFS_BLI_CHUNK) /
109 NBWORD) * sizeof(int))),
110 "xfs_buf_item");
111 xfs_efd_zone = kmem_zone_init((sizeof(xfs_efd_log_item_t) +
112 ((XFS_EFD_MAX_FAST_EXTENTS - 1) * sizeof(xfs_extent_t))),
113 "xfs_efd_item");
114 xfs_efi_zone = kmem_zone_init((sizeof(xfs_efi_log_item_t) +
115 ((XFS_EFI_MAX_FAST_EXTENTS - 1) * sizeof(xfs_extent_t))),
116 "xfs_efi_item");
117 xfs_ifork_zone = kmem_zone_init(sizeof(xfs_ifork_t), "xfs_ifork");
118 xfs_ili_zone = kmem_zone_init(sizeof(xfs_inode_log_item_t), "xfs_ili");
119 xfs_chashlist_zone = kmem_zone_init(sizeof(xfs_chashlist_t),
120 "xfs_chashlist");
121 xfs_acl_zone_init(xfs_acl_zone, "xfs_acl");
122
123 /*
124 * Allocate global trace buffers.
125 */
126 #ifdef XFS_ALLOC_TRACE
127 xfs_alloc_trace_buf = ktrace_alloc(XFS_ALLOC_TRACE_SIZE, KM_SLEEP);
128 #endif
129 #ifdef XFS_BMAP_TRACE
130 xfs_bmap_trace_buf = ktrace_alloc(XFS_BMAP_TRACE_SIZE, KM_SLEEP);
131 #endif
132 #ifdef XFS_BMBT_TRACE
133 xfs_bmbt_trace_buf = ktrace_alloc(XFS_BMBT_TRACE_SIZE, KM_SLEEP);
134 #endif
135 #ifdef XFS_DIR_TRACE
136 xfs_dir_trace_buf = ktrace_alloc(XFS_DIR_TRACE_SIZE, KM_SLEEP);
137 #endif
138 #ifdef XFS_ATTR_TRACE
139 xfs_attr_trace_buf = ktrace_alloc(XFS_ATTR_TRACE_SIZE, KM_SLEEP);
140 #endif
141 #ifdef XFS_DIR2_TRACE
142 xfs_dir2_trace_buf = ktrace_alloc(XFS_DIR2_GTRACE_SIZE, KM_SLEEP);
143 #endif
144
145 xfs_dir_startup();
146
147 #if (defined(DEBUG) || defined(INDUCE_IO_ERROR))
148 xfs_error_test_init();
149 #endif /* DEBUG || INDUCE_IO_ERROR */
150
151 xfs_init_procfs();
152 xfs_sysctl_register();
153 return 0;
154 }
155
156 void
157 xfs_cleanup(void)
158 {
159 extern kmem_zone_t *xfs_bmap_free_item_zone;
160 extern kmem_zone_t *xfs_btree_cur_zone;
161 extern kmem_zone_t *xfs_inode_zone;
162 extern kmem_zone_t *xfs_trans_zone;
163 extern kmem_zone_t *xfs_da_state_zone;
164 extern kmem_zone_t *xfs_dabuf_zone;
165 extern kmem_zone_t *xfs_efd_zone;
166 extern kmem_zone_t *xfs_efi_zone;
167 extern kmem_zone_t *xfs_buf_item_zone;
168 extern kmem_zone_t *xfs_chashlist_zone;
169
170 xfs_cleanup_procfs();
171 xfs_sysctl_unregister();
172 xfs_refcache_destroy();
173 xfs_acl_zone_destroy(xfs_acl_zone);
174
175 #ifdef XFS_DIR2_TRACE
176 ktrace_free(xfs_dir2_trace_buf);
177 #endif
178 #ifdef XFS_ATTR_TRACE
179 ktrace_free(xfs_attr_trace_buf);
180 #endif
181 #ifdef XFS_DIR_TRACE
182 ktrace_free(xfs_dir_trace_buf);
183 #endif
184 #ifdef XFS_BMBT_TRACE
185 ktrace_free(xfs_bmbt_trace_buf);
186 #endif
187 #ifdef XFS_BMAP_TRACE
188 ktrace_free(xfs_bmap_trace_buf);
189 #endif
190 #ifdef XFS_ALLOC_TRACE
191 ktrace_free(xfs_alloc_trace_buf);
192 #endif
193
194 kmem_cache_destroy(xfs_bmap_free_item_zone);
195 kmem_cache_destroy(xfs_btree_cur_zone);
196 kmem_cache_destroy(xfs_inode_zone);
197 kmem_cache_destroy(xfs_trans_zone);
198 kmem_cache_destroy(xfs_da_state_zone);
199 kmem_cache_destroy(xfs_dabuf_zone);
200 kmem_cache_destroy(xfs_buf_item_zone);
201 kmem_cache_destroy(xfs_efd_zone);
202 kmem_cache_destroy(xfs_efi_zone);
203 kmem_cache_destroy(xfs_ifork_zone);
204 kmem_cache_destroy(xfs_ili_zone);
205 kmem_cache_destroy(xfs_chashlist_zone);
206 }
207
208 /*
209 * xfs_start_flags
210 *
211 * This function fills in xfs_mount_t fields based on mount args.
212 * Note: the superblock has _not_ yet been read in.
213 */
214 STATIC int
215 xfs_start_flags(
216 struct vfs *vfs,
217 struct xfs_mount_args *ap,
218 struct xfs_mount *mp)
219 {
220 /* Values are in BBs */
221 if ((ap->flags & XFSMNT_NOALIGN) != XFSMNT_NOALIGN) {
222 /*
223 * At this point the superblock has not been read
224 * in, therefore we do not know the block size.
225 * Before the mount call ends we will convert
226 * these to FSBs.
227 */
228 mp->m_dalign = ap->sunit;
229 mp->m_swidth = ap->swidth;
230 }
231
232 if (ap->logbufs != -1 &&
233 #if defined(DEBUG) || defined(XLOG_NOLOG)
234 ap->logbufs != 0 &&
235 #endif
236 (ap->logbufs < XLOG_MIN_ICLOGS ||
237 ap->logbufs > XLOG_MAX_ICLOGS)) {
238 cmn_err(CE_WARN,
239 "XFS: invalid logbufs value: %d [not %d-%d]",
240 ap->logbufs, XLOG_MIN_ICLOGS, XLOG_MAX_ICLOGS);
241 return XFS_ERROR(EINVAL);
242 }
243 mp->m_logbufs = ap->logbufs;
244 if (ap->logbufsize != -1 &&
245 ap->logbufsize != 16 * 1024 &&
246 ap->logbufsize != 32 * 1024 &&
247 ap->logbufsize != 64 * 1024 &&
248 ap->logbufsize != 128 * 1024 &&
249 ap->logbufsize != 256 * 1024) {
250 cmn_err(CE_WARN,
251 "XFS: invalid logbufsize: %d [not 16k,32k,64k,128k or 256k]",
252 ap->logbufsize);
253 return XFS_ERROR(EINVAL);
254 }
255 mp->m_ihsize = ap->ihashsize;
256 mp->m_logbsize = ap->logbufsize;
257 mp->m_fsname_len = strlen(ap->fsname) + 1;
258 mp->m_fsname = kmem_alloc(mp->m_fsname_len, KM_SLEEP);
259 strcpy(mp->m_fsname, ap->fsname);
260
261 /*
262 * Pull in the 'wsync' and 'ino64' mount options before we do the real
263 * work of mounting and recovery. The arg pointer will
264 * be NULL when we are being called from the root mount code.
265 */
266 if (ap->flags & XFSMNT_WSYNC)
267 mp->m_flags |= XFS_MOUNT_WSYNC;
268 #if XFS_BIG_INUMS
269 if (ap->flags & XFSMNT_INO64) {
270 mp->m_flags |= XFS_MOUNT_INO64;
271 mp->m_inoadd = XFS_INO64_OFFSET;
272 }
273 #endif
274 if (ap->flags & XFSMNT_NOATIME)
275 mp->m_flags |= XFS_MOUNT_NOATIME;
276
277 if (ap->flags & XFSMNT_RETERR)
278 mp->m_flags |= XFS_MOUNT_RETERR;
279
280 if (ap->flags & XFSMNT_NOALIGN)
281 mp->m_flags |= XFS_MOUNT_NOALIGN;
282
283 if (ap->flags & XFSMNT_SWALLOC)
284 mp->m_flags |= XFS_MOUNT_SWALLOC;
285
286 if (ap->flags & XFSMNT_OSYNCISOSYNC)
287 mp->m_flags |= XFS_MOUNT_OSYNCISOSYNC;
288
289 if (ap->flags & XFSMNT_32BITINODES)
290 mp->m_flags |= (XFS_MOUNT_32BITINODES | XFS_MOUNT_32BITINOOPT);
291
292 if (ap->flags & XFSMNT_IOSIZE) {
293 if (ap->iosizelog > XFS_MAX_IO_LOG ||
294 ap->iosizelog < XFS_MIN_IO_LOG) {
295 cmn_err(CE_WARN,
296 "XFS: invalid log iosize: %d [not %d-%d]",
297 ap->iosizelog, XFS_MIN_IO_LOG,
298 XFS_MAX_IO_LOG);
299 return XFS_ERROR(EINVAL);
300 }
301
302 mp->m_flags |= XFS_MOUNT_DFLT_IOSIZE;
303 mp->m_readio_log = mp->m_writeio_log = ap->iosizelog;
304 }
305 if (ap->flags & XFSMNT_IDELETE)
306 mp->m_flags |= XFS_MOUNT_IDELETE;
307
308 /*
309 * no recovery flag requires a read-only mount
310 */
311 if (ap->flags & XFSMNT_NORECOVERY) {
312 if (!(vfs->vfs_flag & VFS_RDONLY)) {
313 cmn_err(CE_WARN,
314 "XFS: tried to mount a FS read-write without recovery!");
315 return XFS_ERROR(EINVAL);
316 }
317 mp->m_flags |= XFS_MOUNT_NORECOVERY;
318 }
319
320 if (ap->flags & XFSMNT_NOUUID)
321 mp->m_flags |= XFS_MOUNT_NOUUID;
322 if (ap->flags & XFSMNT_NOLOGFLUSH)
323 mp->m_flags |= XFS_MOUNT_NOLOGFLUSH;
324
325 return 0;
326 }
327
328 /*
329 * This function fills in xfs_mount_t fields based on mount args.
330 * Note: the superblock _has_ now been read in.
331 */
332 STATIC int
333 xfs_finish_flags(
334 struct vfs *vfs,
335 struct xfs_mount_args *ap,
336 struct xfs_mount *mp)
337 {
338 int ronly = (vfs->vfs_flag & VFS_RDONLY);
339
340 /* Fail a mount where the logbuf is smaller then the log stripe */
341 if (XFS_SB_VERSION_HASLOGV2(&mp->m_sb)) {
342 if ((ap->logbufsize == -1) &&
343 (mp->m_sb.sb_logsunit > XLOG_BIG_RECORD_BSIZE)) {
344 mp->m_logbsize = mp->m_sb.sb_logsunit;
345 } else if (ap->logbufsize < mp->m_sb.sb_logsunit) {
346 cmn_err(CE_WARN,
347 "XFS: logbuf size must be greater than or equal to log stripe size");
348 return XFS_ERROR(EINVAL);
349 }
350 } else {
351 /* Fail a mount if the logbuf is larger than 32K */
352 if (ap->logbufsize > XLOG_BIG_RECORD_BSIZE) {
353 cmn_err(CE_WARN,
354 "XFS: logbuf size for version 1 logs must be 16K or 32K");
355 return XFS_ERROR(EINVAL);
356 }
357 }
358
359 /*
360 * prohibit r/w mounts of read-only filesystems
361 */
362 if ((mp->m_sb.sb_flags & XFS_SBF_READONLY) && !ronly) {
363 cmn_err(CE_WARN,
364 "XFS: cannot mount a read-only filesystem as read-write");
365 return XFS_ERROR(EROFS);
366 }
367
368 /*
369 * disallow mount attempts with (IRIX) project quota enabled
370 */
371 if (XFS_SB_VERSION_HASQUOTA(&mp->m_sb) &&
372 (mp->m_sb.sb_qflags & XFS_PQUOTA_ACCT)) {
373 cmn_err(CE_WARN,
374 "XFS: cannot mount a filesystem with IRIX project quota enabled");
375 return XFS_ERROR(ENOSYS);
376 }
377
378 /*
379 * check for shared mount.
380 */
381 if (ap->flags & XFSMNT_SHARED) {
382 if (!XFS_SB_VERSION_HASSHARED(&mp->m_sb))
383 return XFS_ERROR(EINVAL);
384
385 /*
386 * For IRIX 6.5, shared mounts must have the shared
387 * version bit set, have the persistent readonly
388 * field set, must be version 0 and can only be mounted
389 * read-only.
390 */
391 if (!ronly || !(mp->m_sb.sb_flags & XFS_SBF_READONLY) ||
392 (mp->m_sb.sb_shared_vn != 0))
393 return XFS_ERROR(EINVAL);
394
395 mp->m_flags |= XFS_MOUNT_SHARED;
396
397 /*
398 * Shared XFS V0 can't deal with DMI. Return EINVAL.
399 */
400 if (mp->m_sb.sb_shared_vn == 0 && (ap->flags & XFSMNT_DMAPI))
401 return XFS_ERROR(EINVAL);
402 }
403
404 return 0;
405 }
406
407 /*
408 * xfs_mount
409 *
410 * The file system configurations are:
411 * (1) device (partition) with data and internal log
412 * (2) logical volume with data and log subvolumes.
413 * (3) logical volume with data, log, and realtime subvolumes.
414 *
415 * We only have to handle opening the log and realtime volumes here if
416 * they are present. The data subvolume has already been opened by
417 * get_sb_bdev() and is stored in vfsp->vfs_super->s_bdev.
418 */
419 STATIC int
420 xfs_mount(
421 struct bhv_desc *bhvp,
422 struct xfs_mount_args *args,
423 cred_t *credp)
424 {
425 struct vfs *vfsp = bhvtovfs(bhvp);
426 struct bhv_desc *p;
427 struct xfs_mount *mp = XFS_BHVTOM(bhvp);
428 struct block_device *ddev, *logdev, *rtdev;
429 int flags = 0, error;
430
431 ddev = vfsp->vfs_super->s_bdev;
432 logdev = rtdev = NULL;
433
434 /*
435 * Setup xfs_mount function vectors from available behaviors
436 */
437 p = vfs_bhv_lookup(vfsp, VFS_POSITION_DM);
438 mp->m_dm_ops = p ? *(xfs_dmops_t *) vfs_bhv_custom(p) : xfs_dmcore_stub;
439 p = vfs_bhv_lookup(vfsp, VFS_POSITION_QM);
440 mp->m_qm_ops = p ? *(xfs_qmops_t *) vfs_bhv_custom(p) : xfs_qmcore_stub;
441 p = vfs_bhv_lookup(vfsp, VFS_POSITION_IO);
442 mp->m_io_ops = p ? *(xfs_ioops_t *) vfs_bhv_custom(p) : xfs_iocore_xfs;
443
444 /*
445 * Open real time and log devices - order is important.
446 */
447 if (args->logname[0]) {
448 error = xfs_blkdev_get(mp, args->logname, &logdev);
449 if (error)
450 return error;
451 }
452 if (args->rtname[0]) {
453 error = xfs_blkdev_get(mp, args->rtname, &rtdev);
454 if (error) {
455 xfs_blkdev_put(logdev);
456 return error;
457 }
458
459 if (rtdev == ddev || rtdev == logdev) {
460 cmn_err(CE_WARN,
461 "XFS: Cannot mount filesystem with identical rtdev and ddev/logdev.");
462 xfs_blkdev_put(logdev);
463 xfs_blkdev_put(rtdev);
464 return EINVAL;
465 }
466 }
467
468 /*
469 * Setup xfs_mount buffer target pointers
470 */
471 error = ENOMEM;
472 mp->m_ddev_targp = xfs_alloc_buftarg(ddev, 0);
473 if (!mp->m_ddev_targp) {
474 xfs_blkdev_put(logdev);
475 xfs_blkdev_put(rtdev);
476 return error;
477 }
478 if (rtdev) {
479 mp->m_rtdev_targp = xfs_alloc_buftarg(rtdev, 1);
480 if (!mp->m_rtdev_targp)
481 goto error0;
482 }
483 mp->m_logdev_targp = (logdev && logdev != ddev) ?
484 xfs_alloc_buftarg(logdev, 1) : mp->m_ddev_targp;
485 if (!mp->m_logdev_targp)
486 goto error0;
487
488 /*
489 * Setup flags based on mount(2) options and then the superblock
490 */
491 error = xfs_start_flags(vfsp, args, mp);
492 if (error)
493 goto error1;
494 error = xfs_readsb(mp);
495 if (error)
496 goto error1;
497 error = xfs_finish_flags(vfsp, args, mp);
498 if (error)
499 goto error2;
500
501 /*
502 * Setup xfs_mount buffer target pointers based on superblock
503 */
504 error = xfs_setsize_buftarg(mp->m_ddev_targp, mp->m_sb.sb_blocksize,
505 mp->m_sb.sb_sectsize);
506 if (!error && logdev && logdev != ddev) {
507 unsigned int log_sector_size = BBSIZE;
508
509 if (XFS_SB_VERSION_HASSECTOR(&mp->m_sb))
510 log_sector_size = mp->m_sb.sb_logsectsize;
511 error = xfs_setsize_buftarg(mp->m_logdev_targp,
512 mp->m_sb.sb_blocksize,
513 log_sector_size);
514 }
515 if (!error && rtdev)
516 error = xfs_setsize_buftarg(mp->m_rtdev_targp,
517 mp->m_sb.sb_blocksize,
518 mp->m_sb.sb_sectsize);
519 if (error)
520 goto error2;
521
522 error = XFS_IOINIT(vfsp, args, flags);
523 if (!error)
524 return 0;
525 error2:
526 if (mp->m_sb_bp)
527 xfs_freesb(mp);
528 error1:
529 xfs_binval(mp->m_ddev_targp);
530 if (logdev && logdev != ddev)
531 xfs_binval(mp->m_logdev_targp);
532 if (rtdev)
533 xfs_binval(mp->m_rtdev_targp);
534 error0:
535 xfs_unmountfs_close(mp, credp);
536 return error;
537 }
538
539 STATIC int
540 xfs_unmount(
541 bhv_desc_t *bdp,
542 int flags,
543 cred_t *credp)
544 {
545 struct vfs *vfsp = bhvtovfs(bdp);
546 xfs_mount_t *mp = XFS_BHVTOM(bdp);
547 xfs_inode_t *rip;
548 vnode_t *rvp;
549 int unmount_event_wanted = 0;
550 int unmount_event_flags = 0;
551 int xfs_unmountfs_needed = 0;
552 int error;
553
554 rip = mp->m_rootip;
555 rvp = XFS_ITOV(rip);
556
557 if (vfsp->vfs_flag & VFS_DMI) {
558 error = XFS_SEND_PREUNMOUNT(mp, vfsp,
559 rvp, DM_RIGHT_NULL, rvp, DM_RIGHT_NULL,
560 NULL, NULL, 0, 0,
561 (mp->m_dmevmask & (1<<DM_EVENT_PREUNMOUNT))?
562 0:DM_FLAGS_UNWANTED);
563 if (error)
564 return XFS_ERROR(error);
565 unmount_event_wanted = 1;
566 unmount_event_flags = (mp->m_dmevmask & (1<<DM_EVENT_UNMOUNT))?
567 0 : DM_FLAGS_UNWANTED;
568 }
569
570 /*
571 * First blow any referenced inode from this file system
572 * out of the reference cache, and delete the timer.
573 */
574 xfs_refcache_purge_mp(mp);
575
576 XFS_bflush(mp->m_ddev_targp);
577 error = xfs_unmount_flush(mp, 0);
578 if (error)
579 goto out;
580
581 ASSERT(vn_count(rvp) == 1);
582
583 /*
584 * Drop the reference count
585 */
586 VN_RELE(rvp);
587
588 /*
589 * If we're forcing a shutdown, typically because of a media error,
590 * we want to make sure we invalidate dirty pages that belong to
591 * referenced vnodes as well.
592 */
593 if (XFS_FORCED_SHUTDOWN(mp)) {
594 error = xfs_sync(&mp->m_bhv,
595 (SYNC_WAIT | SYNC_CLOSE), credp);
596 ASSERT(error != EFSCORRUPTED);
597 }
598 xfs_unmountfs_needed = 1;
599
600 out:
601 /* Send DMAPI event, if required.
602 * Then do xfs_unmountfs() if needed.
603 * Then return error (or zero).
604 */
605 if (unmount_event_wanted) {
606 /* Note: mp structure must still exist for
607 * XFS_SEND_UNMOUNT() call.
608 */
609 XFS_SEND_UNMOUNT(mp, vfsp, error == 0 ? rvp : NULL,
610 DM_RIGHT_NULL, 0, error, unmount_event_flags);
611 }
612 if (xfs_unmountfs_needed) {
613 /*
614 * Call common unmount function to flush to disk
615 * and free the super block buffer & mount structures.
616 */
617 xfs_unmountfs(mp, credp);
618 }
619
620 return XFS_ERROR(error);
621 }
622
623 #define REMOUNT_READONLY_FLAGS (SYNC_REMOUNT|SYNC_ATTR|SYNC_WAIT)
624
625 STATIC int
626 xfs_mntupdate(
627 bhv_desc_t *bdp,
628 int *flags,
629 struct xfs_mount_args *args)
630 {
631 struct vfs *vfsp = bhvtovfs(bdp);
632 xfs_mount_t *mp = XFS_BHVTOM(bdp);
633 int pincount, error;
634 int count = 0;
635
636 if (args->flags & XFSMNT_NOATIME)
637 mp->m_flags |= XFS_MOUNT_NOATIME;
638 else
639 mp->m_flags &= ~XFS_MOUNT_NOATIME;
640
641 if (!(vfsp->vfs_flag & VFS_RDONLY)) {
642 VFS_SYNC(vfsp, SYNC_FSDATA|SYNC_BDFLUSH|SYNC_ATTR, NULL, error);
643 }
644
645 if (*flags & MS_RDONLY) {
646 xfs_refcache_purge_mp(mp);
647 xfs_flush_buftarg(mp->m_ddev_targp, 0);
648 xfs_finish_reclaim_all(mp, 0);
649
650 /* This loop must run at least twice.
651 * The first instance of the loop will flush
652 * most meta data but that will generate more
653 * meta data (typically directory updates).
654 * Which then must be flushed and logged before
655 * we can write the unmount record.
656 */
657 do {
658 VFS_SYNC(vfsp, REMOUNT_READONLY_FLAGS, NULL, error);
659 pincount = xfs_flush_buftarg(mp->m_ddev_targp, 1);
660 if (!pincount) {
661 delay(50);
662 count++;
663 }
664 } while (count < 2);
665
666 /* Ok now write out an unmount record */
667 xfs_log_unmount_write(mp);
668 xfs_unmountfs_writesb(mp);
669 vfsp->vfs_flag |= VFS_RDONLY;
670 } else {
671 vfsp->vfs_flag &= ~VFS_RDONLY;
672 }
673
674 return 0;
675 }
676
677 /*
678 * xfs_unmount_flush implements a set of flush operation on special
679 * inodes, which are needed as a separate set of operations so that
680 * they can be called as part of relocation process.
681 */
682 int
683 xfs_unmount_flush(
684 xfs_mount_t *mp, /* Mount structure we are getting
685 rid of. */
686 int relocation) /* Called from vfs relocation. */
687 {
688 xfs_inode_t *rip = mp->m_rootip;
689 xfs_inode_t *rbmip;
690 xfs_inode_t *rsumip = NULL;
691 vnode_t *rvp = XFS_ITOV(rip);
692 int error;
693
694 xfs_ilock(rip, XFS_ILOCK_EXCL);
695 xfs_iflock(rip);
696
697 /*
698 * Flush out the real time inodes.
699 */
700 if ((rbmip = mp->m_rbmip) != NULL) {
701 xfs_ilock(rbmip, XFS_ILOCK_EXCL);
702 xfs_iflock(rbmip);
703 error = xfs_iflush(rbmip, XFS_IFLUSH_SYNC);
704 xfs_iunlock(rbmip, XFS_ILOCK_EXCL);
705
706 if (error == EFSCORRUPTED)
707 goto fscorrupt_out;
708
709 ASSERT(vn_count(XFS_ITOV(rbmip)) == 1);
710
711 rsumip = mp->m_rsumip;
712 xfs_ilock(rsumip, XFS_ILOCK_EXCL);
713 xfs_iflock(rsumip);
714 error = xfs_iflush(rsumip, XFS_IFLUSH_SYNC);
715 xfs_iunlock(rsumip, XFS_ILOCK_EXCL);
716
717 if (error == EFSCORRUPTED)
718 goto fscorrupt_out;
719
720 ASSERT(vn_count(XFS_ITOV(rsumip)) == 1);
721 }
722
723 /*
724 * Synchronously flush root inode to disk
725 */
726 error = xfs_iflush(rip, XFS_IFLUSH_SYNC);
727 if (error == EFSCORRUPTED)
728 goto fscorrupt_out2;
729
730 if (vn_count(rvp) != 1 && !relocation) {
731 xfs_iunlock(rip, XFS_ILOCK_EXCL);
732 return XFS_ERROR(EBUSY);
733 }
734
735 /*
736 * Release dquot that rootinode, rbmino and rsumino might be holding,
737 * flush and purge the quota inodes.
738 */
739 error = XFS_QM_UNMOUNT(mp);
740 if (error == EFSCORRUPTED)
741 goto fscorrupt_out2;
742
743 if (rbmip) {
744 VN_RELE(XFS_ITOV(rbmip));
745 VN_RELE(XFS_ITOV(rsumip));
746 }
747
748 xfs_iunlock(rip, XFS_ILOCK_EXCL);
749 return 0;
750
751 fscorrupt_out:
752 xfs_ifunlock(rip);
753
754 fscorrupt_out2:
755 xfs_iunlock(rip, XFS_ILOCK_EXCL);
756
757 return XFS_ERROR(EFSCORRUPTED);
758 }
759
760 /*
761 * xfs_root extracts the root vnode from a vfs.
762 *
763 * vfsp -- the vfs struct for the desired file system
764 * vpp -- address of the caller's vnode pointer which should be
765 * set to the desired fs root vnode
766 */
767 STATIC int
768 xfs_root(
769 bhv_desc_t *bdp,
770 vnode_t **vpp)
771 {
772 vnode_t *vp;
773
774 vp = XFS_ITOV((XFS_BHVTOM(bdp))->m_rootip);
775 VN_HOLD(vp);
776 *vpp = vp;
777 return 0;
778 }
779
780 /*
781 * xfs_statvfs
782 *
783 * Fill in the statvfs structure for the given file system. We use
784 * the superblock lock in the mount structure to ensure a consistent
785 * snapshot of the counters returned.
786 */
787 STATIC int
788 xfs_statvfs(
789 bhv_desc_t *bdp,
790 xfs_statfs_t *statp,
791 vnode_t *vp)
792 {
793 __uint64_t fakeinos;
794 xfs_extlen_t lsize;
795 xfs_mount_t *mp;
796 xfs_sb_t *sbp;
797 unsigned long s;
798 u64 id;
799
800 mp = XFS_BHVTOM(bdp);
801 sbp = &(mp->m_sb);
802
803 statp->f_type = XFS_SB_MAGIC;
804
805 s = XFS_SB_LOCK(mp);
806 statp->f_bsize = sbp->sb_blocksize;
807 lsize = sbp->sb_logstart ? sbp->sb_logblocks : 0;
808 statp->f_blocks = sbp->sb_dblocks - lsize;
809 statp->f_bfree = statp->f_bavail = sbp->sb_fdblocks;
810 fakeinos = statp->f_bfree << sbp->sb_inopblog;
811 #if XFS_BIG_INUMS
812 fakeinos += mp->m_inoadd;
813 #endif
814 statp->f_files =
815 MIN(sbp->sb_icount + fakeinos, (__uint64_t)XFS_MAXINUMBER);
816 if (mp->m_maxicount)
817 #if XFS_BIG_INUMS
818 if (!mp->m_inoadd)
819 #endif
820 statp->f_files = min_t(typeof(statp->f_files),
821 statp->f_files,
822 mp->m_maxicount);
823 statp->f_ffree = statp->f_files - (sbp->sb_icount - sbp->sb_ifree);
824 XFS_SB_UNLOCK(mp, s);
825
826 id = huge_encode_dev(mp->m_dev);
827 statp->f_fsid.val[0] = (u32)id;
828 statp->f_fsid.val[1] = (u32)(id >> 32);
829 statp->f_namelen = MAXNAMELEN - 1;
830
831 return 0;
832 }
833
834
835 /*
836 * xfs_sync flushes any pending I/O to file system vfsp.
837 *
838 * This routine is called by vfs_sync() to make sure that things make it
839 * out to disk eventually, on sync() system calls to flush out everything,
840 * and when the file system is unmounted. For the vfs_sync() case, all
841 * we really need to do is sync out the log to make all of our meta-data
842 * updates permanent (except for timestamps). For calls from pflushd(),
843 * dirty pages are kept moving by calling pdflush() on the inodes
844 * containing them. We also flush the inodes that we can lock without
845 * sleeping and the superblock if we can lock it without sleeping from
846 * vfs_sync() so that items at the tail of the log are always moving out.
847 *
848 * Flags:
849 * SYNC_BDFLUSH - We're being called from vfs_sync() so we don't want
850 * to sleep if we can help it. All we really need
851 * to do is ensure that the log is synced at least
852 * periodically. We also push the inodes and
853 * superblock if we can lock them without sleeping
854 * and they are not pinned.
855 * SYNC_ATTR - We need to flush the inodes. If SYNC_BDFLUSH is not
856 * set, then we really want to lock each inode and flush
857 * it.
858 * SYNC_WAIT - All the flushes that take place in this call should
859 * be synchronous.
860 * SYNC_DELWRI - This tells us to push dirty pages associated with
861 * inodes. SYNC_WAIT and SYNC_BDFLUSH are used to
862 * determine if they should be flushed sync, async, or
863 * delwri.
864 * SYNC_CLOSE - This flag is passed when the system is being
865 * unmounted. We should sync and invalidate everthing.
866 * SYNC_FSDATA - This indicates that the caller would like to make
867 * sure the superblock is safe on disk. We can ensure
868 * this by simply makeing sure the log gets flushed
869 * if SYNC_BDFLUSH is set, and by actually writing it
870 * out otherwise.
871 *
872 */
873 /*ARGSUSED*/
874 STATIC int
875 xfs_sync(
876 bhv_desc_t *bdp,
877 int flags,
878 cred_t *credp)
879 {
880 xfs_mount_t *mp;
881
882 mp = XFS_BHVTOM(bdp);
883 return (xfs_syncsub(mp, flags, 0, NULL));
884 }
885
886 /*
887 * xfs sync routine for internal use
888 *
889 * This routine supports all of the flags defined for the generic VFS_SYNC
890 * interface as explained above under xfs_sync. In the interests of not
891 * changing interfaces within the 6.5 family, additional internallly-
892 * required functions are specified within a separate xflags parameter,
893 * only available by calling this routine.
894 *
895 */
896 STATIC int
897 xfs_sync_inodes(
898 xfs_mount_t *mp,
899 int flags,
900 int xflags,
901 int *bypassed)
902 {
903 xfs_inode_t *ip = NULL;
904 xfs_inode_t *ip_next;
905 xfs_buf_t *bp;
906 vnode_t *vp = NULL;
907 vmap_t vmap;
908 int error;
909 int last_error;
910 uint64_t fflag;
911 uint lock_flags;
912 uint base_lock_flags;
913 boolean_t mount_locked;
914 boolean_t vnode_refed;
915 int preempt;
916 xfs_dinode_t *dip;
917 xfs_iptr_t *ipointer;
918 #ifdef DEBUG
919 boolean_t ipointer_in = B_FALSE;
920
921 #define IPOINTER_SET ipointer_in = B_TRUE
922 #define IPOINTER_CLR ipointer_in = B_FALSE
923 #else
924 #define IPOINTER_SET
925 #define IPOINTER_CLR
926 #endif
927
928
929 /* Insert a marker record into the inode list after inode ip. The list
930 * must be locked when this is called. After the call the list will no
931 * longer be locked.
932 */
933 #define IPOINTER_INSERT(ip, mp) { \
934 ASSERT(ipointer_in == B_FALSE); \
935 ipointer->ip_mnext = ip->i_mnext; \
936 ipointer->ip_mprev = ip; \
937 ip->i_mnext = (xfs_inode_t *)ipointer; \
938 ipointer->ip_mnext->i_mprev = (xfs_inode_t *)ipointer; \
939 preempt = 0; \
940 XFS_MOUNT_IUNLOCK(mp); \
941 mount_locked = B_FALSE; \
942 IPOINTER_SET; \
943 }
944
945 /* Remove the marker from the inode list. If the marker was the only item
946 * in the list then there are no remaining inodes and we should zero out
947 * the whole list. If we are the current head of the list then move the head
948 * past us.
949 */
950 #define IPOINTER_REMOVE(ip, mp) { \
951 ASSERT(ipointer_in == B_TRUE); \
952 if (ipointer->ip_mnext != (xfs_inode_t *)ipointer) { \
953 ip = ipointer->ip_mnext; \
954 ip->i_mprev = ipointer->ip_mprev; \
955 ipointer->ip_mprev->i_mnext = ip; \
956 if (mp->m_inodes == (xfs_inode_t *)ipointer) { \
957 mp->m_inodes = ip; \
958 } \
959 } else { \
960 ASSERT(mp->m_inodes == (xfs_inode_t *)ipointer); \
961 mp->m_inodes = NULL; \
962 ip = NULL; \
963 } \
964 IPOINTER_CLR; \
965 }
966
967 #define XFS_PREEMPT_MASK 0x7f
968
969 if (bypassed)
970 *bypassed = 0;
971 if (XFS_MTOVFS(mp)->vfs_flag & VFS_RDONLY)
972 return 0;
973 error = 0;
974 last_error = 0;
975 preempt = 0;
976
977 /* Allocate a reference marker */
978 ipointer = (xfs_iptr_t *)kmem_zalloc(sizeof(xfs_iptr_t), KM_SLEEP);
979
980 fflag = XFS_B_ASYNC; /* default is don't wait */
981 if (flags & SYNC_BDFLUSH)
982 fflag = XFS_B_DELWRI;
983 if (flags & SYNC_WAIT)
984 fflag = 0; /* synchronous overrides all */
985
986 base_lock_flags = XFS_ILOCK_SHARED;
987 if (flags & (SYNC_DELWRI | SYNC_CLOSE)) {
988 /*
989 * We need the I/O lock if we're going to call any of
990 * the flush/inval routines.
991 */
992 base_lock_flags |= XFS_IOLOCK_SHARED;
993 }
994
995 XFS_MOUNT_ILOCK(mp);
996
997 ip = mp->m_inodes;
998
999 mount_locked = B_TRUE;
1000 vnode_refed = B_FALSE;
1001
1002 IPOINTER_CLR;
1003
1004 do {
1005 ASSERT(ipointer_in == B_FALSE);
1006 ASSERT(vnode_refed == B_FALSE);
1007
1008 lock_flags = base_lock_flags;
1009
1010 /*
1011 * There were no inodes in the list, just break out
1012 * of the loop.
1013 */
1014 if (ip == NULL) {
1015 break;
1016 }
1017
1018 /*
1019 * We found another sync thread marker - skip it
1020 */
1021 if (ip->i_mount == NULL) {
1022 ip = ip->i_mnext;
1023 continue;
1024 }
1025
1026 vp = XFS_ITOV_NULL(ip);
1027
1028 /*
1029 * If the vnode is gone then this is being torn down,
1030 * call reclaim if it is flushed, else let regular flush
1031 * code deal with it later in the loop.
1032 */
1033
1034 if (vp == NULL) {
1035 /* Skip ones already in reclaim */
1036 if (ip->i_flags & XFS_IRECLAIM) {
1037 ip = ip->i_mnext;
1038 continue;
1039 }
1040 if (xfs_ilock_nowait(ip, XFS_ILOCK_EXCL) == 0) {
1041 ip = ip->i_mnext;
1042 } else if ((xfs_ipincount(ip) == 0) &&
1043 xfs_iflock_nowait(ip)) {
1044 IPOINTER_INSERT(ip, mp);
1045
1046 xfs_finish_reclaim(ip, 1,
1047 XFS_IFLUSH_DELWRI_ELSE_ASYNC);
1048
1049 XFS_MOUNT_ILOCK(mp);
1050 mount_locked = B_TRUE;
1051 IPOINTER_REMOVE(ip, mp);
1052 } else {
1053 xfs_iunlock(ip, XFS_ILOCK_EXCL);
1054 ip = ip->i_mnext;
1055 }
1056 continue;
1057 }
1058
1059 if (VN_BAD(vp)) {
1060 ip = ip->i_mnext;
1061 continue;
1062 }
1063
1064 if (XFS_FORCED_SHUTDOWN(mp) && !(flags & SYNC_CLOSE)) {
1065 XFS_MOUNT_IUNLOCK(mp);
1066 kmem_free(ipointer, sizeof(xfs_iptr_t));
1067 return 0;
1068 }
1069
1070 /*
1071 * If this is just vfs_sync() or pflushd() calling
1072 * then we can skip inodes for which it looks like
1073 * there is nothing to do. Since we don't have the
1074 * inode locked this is racey, but these are periodic
1075 * calls so it doesn't matter. For the others we want
1076 * to know for sure, so we at least try to lock them.
1077 */
1078 if (flags & SYNC_BDFLUSH) {
1079 if (((ip->i_itemp == NULL) ||
1080 !(ip->i_itemp->ili_format.ilf_fields &
1081 XFS_ILOG_ALL)) &&
1082 (ip->i_update_core == 0)) {
1083 ip = ip->i_mnext;
1084 continue;
1085 }
1086 }
1087
1088 /*
1089 * Try to lock without sleeping. We're out of order with
1090 * the inode list lock here, so if we fail we need to drop
1091 * the mount lock and try again. If we're called from
1092 * bdflush() here, then don't bother.
1093 *
1094 * The inode lock here actually coordinates with the
1095 * almost spurious inode lock in xfs_ireclaim() to prevent
1096 * the vnode we handle here without a reference from
1097 * being freed while we reference it. If we lock the inode
1098 * while it's on the mount list here, then the spurious inode
1099 * lock in xfs_ireclaim() after the inode is pulled from
1100 * the mount list will sleep until we release it here.
1101 * This keeps the vnode from being freed while we reference
1102 * it. It is also cheaper and simpler than actually doing
1103 * a vn_get() for every inode we touch here.
1104 */
1105 if (xfs_ilock_nowait(ip, lock_flags) == 0) {
1106
1107 if ((flags & SYNC_BDFLUSH) || (vp == NULL)) {
1108 ip = ip->i_mnext;
1109 continue;
1110 }
1111
1112 /*
1113 * We need to unlock the inode list lock in order
1114 * to lock the inode. Insert a marker record into
1115 * the inode list to remember our position, dropping
1116 * the lock is now done inside the IPOINTER_INSERT
1117 * macro.
1118 *
1119 * We also use the inode list lock to protect us
1120 * in taking a snapshot of the vnode version number
1121 * for use in calling vn_get().
1122 */
1123 VMAP(vp, vmap);
1124 IPOINTER_INSERT(ip, mp);
1125
1126 vp = vn_get(vp, &vmap);
1127 if (vp == NULL) {
1128 /*
1129 * The vnode was reclaimed once we let go
1130 * of the inode list lock. Skip to the
1131 * next list entry. Remove the marker.
1132 */
1133
1134 XFS_MOUNT_ILOCK(mp);
1135
1136 mount_locked = B_TRUE;
1137 vnode_refed = B_FALSE;
1138
1139 IPOINTER_REMOVE(ip, mp);
1140
1141 continue;
1142 }
1143
1144 xfs_ilock(ip, lock_flags);
1145
1146 ASSERT(vp == XFS_ITOV(ip));
1147 ASSERT(ip->i_mount == mp);
1148
1149 vnode_refed = B_TRUE;
1150 }
1151
1152 /* From here on in the loop we may have a marker record
1153 * in the inode list.
1154 */
1155
1156 if ((flags & SYNC_CLOSE) && (vp != NULL)) {
1157 /*
1158 * This is the shutdown case. We just need to
1159 * flush and invalidate all the pages associated
1160 * with the inode. Drop the inode lock since
1161 * we can't hold it across calls to the buffer
1162 * cache.
1163 *
1164 * We don't set the VREMAPPING bit in the vnode
1165 * here, because we don't hold the vnode lock
1166 * exclusively. It doesn't really matter, though,
1167 * because we only come here when we're shutting
1168 * down anyway.
1169 */
1170 xfs_iunlock(ip, XFS_ILOCK_SHARED);
1171
1172 if (XFS_FORCED_SHUTDOWN(mp)) {
1173 VOP_TOSS_PAGES(vp, 0, -1, FI_REMAPF);
1174 } else {
1175 VOP_FLUSHINVAL_PAGES(vp, 0, -1, FI_REMAPF);
1176 }
1177
1178 xfs_ilock(ip, XFS_ILOCK_SHARED);
1179
1180 } else if ((flags & SYNC_DELWRI) && (vp != NULL)) {
1181 if (VN_DIRTY(vp)) {
1182 /* We need to have dropped the lock here,
1183 * so insert a marker if we have not already
1184 * done so.
1185 */
1186 if (mount_locked) {
1187 IPOINTER_INSERT(ip, mp);
1188 }
1189
1190 /*
1191 * Drop the inode lock since we can't hold it
1192 * across calls to the buffer cache.
1193 */
1194 xfs_iunlock(ip, XFS_ILOCK_SHARED);
1195 VOP_FLUSH_PAGES(vp, (xfs_off_t)0, -1,
1196 fflag, FI_NONE, error);
1197 xfs_ilock(ip, XFS_ILOCK_SHARED);
1198 }
1199
1200 }
1201
1202 if (flags & SYNC_BDFLUSH) {
1203 if ((flags & SYNC_ATTR) &&
1204 ((ip->i_update_core) ||
1205 ((ip->i_itemp != NULL) &&
1206 (ip->i_itemp->ili_format.ilf_fields != 0)))) {
1207
1208 /* Insert marker and drop lock if not already
1209 * done.
1210 */
1211 if (mount_locked) {
1212 IPOINTER_INSERT(ip, mp);
1213 }
1214
1215 /*
1216 * We don't want the periodic flushing of the
1217 * inodes by vfs_sync() to interfere with
1218 * I/O to the file, especially read I/O
1219 * where it is only the access time stamp
1220 * that is being flushed out. To prevent
1221 * long periods where we have both inode
1222 * locks held shared here while reading the
1223 * inode's buffer in from disk, we drop the
1224 * inode lock while reading in the inode
1225 * buffer. We have to release the buffer
1226 * and reacquire the inode lock so that they
1227 * are acquired in the proper order (inode
1228 * locks first). The buffer will go at the
1229 * end of the lru chain, though, so we can
1230 * expect it to still be there when we go
1231 * for it again in xfs_iflush().
1232 */
1233 if ((xfs_ipincount(ip) == 0) &&
1234 xfs_iflock_nowait(ip)) {
1235
1236 xfs_ifunlock(ip);
1237 xfs_iunlock(ip, XFS_ILOCK_SHARED);
1238
1239 error = xfs_itobp(mp, NULL, ip,
1240 &dip, &bp, 0);
1241 if (!error) {
1242 xfs_buf_relse(bp);
1243 } else {
1244 /* Bailing out, remove the
1245 * marker and free it.
1246 */
1247 XFS_MOUNT_ILOCK(mp);
1248
1249 IPOINTER_REMOVE(ip, mp);
1250
1251 XFS_MOUNT_IUNLOCK(mp);
1252
1253 ASSERT(!(lock_flags &
1254 XFS_IOLOCK_SHARED));
1255
1256 kmem_free(ipointer,
1257 sizeof(xfs_iptr_t));
1258 return (0);
1259 }
1260
1261 /*
1262 * Since we dropped the inode lock,
1263 * the inode may have been reclaimed.
1264 * Therefore, we reacquire the mount
1265 * lock and check to see if we were the
1266 * inode reclaimed. If this happened
1267 * then the ipointer marker will no
1268 * longer point back at us. In this
1269 * case, move ip along to the inode
1270 * after the marker, remove the marker
1271 * and continue.
1272 */
1273 XFS_MOUNT_ILOCK(mp);
1274 mount_locked = B_TRUE;
1275
1276 if (ip != ipointer->ip_mprev) {
1277 IPOINTER_REMOVE(ip, mp);
1278
1279 ASSERT(!vnode_refed);
1280 ASSERT(!(lock_flags &
1281 XFS_IOLOCK_SHARED));
1282 continue;
1283 }
1284
1285 ASSERT(ip->i_mount == mp);
1286
1287 if (xfs_ilock_nowait(ip,
1288 XFS_ILOCK_SHARED) == 0) {
1289 ASSERT(ip->i_mount == mp);
1290 /*
1291 * We failed to reacquire
1292 * the inode lock without
1293 * sleeping, so just skip
1294 * the inode for now. We
1295 * clear the ILOCK bit from
1296 * the lock_flags so that we
1297 * won't try to drop a lock
1298 * we don't hold below.
1299 */
1300 lock_flags &= ~XFS_ILOCK_SHARED;
1301 IPOINTER_REMOVE(ip_next, mp);
1302 } else if ((xfs_ipincount(ip) == 0) &&
1303 xfs_iflock_nowait(ip)) {
1304 ASSERT(ip->i_mount == mp);
1305 /*
1306 * Since this is vfs_sync()
1307 * calling we only flush the
1308 * inode out if we can lock
1309 * it without sleeping and
1310 * it is not pinned. Drop
1311 * the mount lock here so
1312 * that we don't hold it for
1313 * too long. We already have
1314 * a marker in the list here.
1315 */
1316 XFS_MOUNT_IUNLOCK(mp);
1317 mount_locked = B_FALSE;
1318 error = xfs_iflush(ip,
1319 XFS_IFLUSH_DELWRI);
1320 } else {
1321 ASSERT(ip->i_mount == mp);
1322 IPOINTER_REMOVE(ip_next, mp);
1323 }
1324 }
1325
1326 }
1327
1328 } else {
1329 if ((flags & SYNC_ATTR) &&
1330 ((ip->i_update_core) ||
1331 ((ip->i_itemp != NULL) &&
1332 (ip->i_itemp->ili_format.ilf_fields != 0)))) {
1333 if (mount_locked) {
1334 IPOINTER_INSERT(ip, mp);
1335 }
1336
1337 if (flags & SYNC_WAIT) {
1338 xfs_iflock(ip);
1339 error = xfs_iflush(ip,
1340 XFS_IFLUSH_SYNC);
1341 } else {
1342 /*
1343 * If we can't acquire the flush
1344 * lock, then the inode is already
1345 * being flushed so don't bother
1346 * waiting. If we can lock it then
1347 * do a delwri flush so we can
1348 * combine multiple inode flushes
1349 * in each disk write.
1350 */
1351 if (xfs_iflock_nowait(ip)) {
1352 error = xfs_iflush(ip,
1353 XFS_IFLUSH_DELWRI);
1354 }
1355 else if (bypassed)
1356 (*bypassed)++;
1357 }
1358 }
1359 }
1360
1361 if (lock_flags != 0) {
1362 xfs_iunlock(ip, lock_flags);
1363 }
1364
1365 if (vnode_refed) {
1366 /*
1367 * If we had to take a reference on the vnode
1368 * above, then wait until after we've unlocked
1369 * the inode to release the reference. This is
1370 * because we can be already holding the inode
1371 * lock when VN_RELE() calls xfs_inactive().
1372 *
1373 * Make sure to drop the mount lock before calling
1374 * VN_RELE() so that we don't trip over ourselves if
1375 * we have to go for the mount lock again in the
1376 * inactive code.
1377 */
1378 if (mount_locked) {
1379 IPOINTER_INSERT(ip, mp);
1380 }
1381
1382 VN_RELE(vp);
1383
1384 vnode_refed = B_FALSE;
1385 }
1386
1387 if (error) {
1388 last_error = error;
1389 }
1390
1391 /*
1392 * bail out if the filesystem is corrupted.
1393 */
1394 if (error == EFSCORRUPTED) {
1395 if (!mount_locked) {
1396 XFS_MOUNT_ILOCK(mp);
1397 IPOINTER_REMOVE(ip, mp);
1398 }
1399 XFS_MOUNT_IUNLOCK(mp);
1400 ASSERT(ipointer_in == B_FALSE);
1401 kmem_free(ipointer, sizeof(xfs_iptr_t));
1402 return XFS_ERROR(error);
1403 }
1404
1405 /* Let other threads have a chance at the mount lock
1406 * if we have looped many times without dropping the
1407 * lock.
1408 */
1409 if ((++preempt & XFS_PREEMPT_MASK) == 0) {
1410 if (mount_locked) {
1411 IPOINTER_INSERT(ip, mp);
1412 }
1413 }
1414
1415 if (mount_locked == B_FALSE) {
1416 XFS_MOUNT_ILOCK(mp);
1417 mount_locked = B_TRUE;
1418 IPOINTER_REMOVE(ip, mp);
1419 continue;
1420 }
1421
1422 ASSERT(ipointer_in == B_FALSE);
1423 ip = ip->i_mnext;
1424
1425 } while (ip != mp->m_inodes);
1426
1427 XFS_MOUNT_IUNLOCK(mp);
1428
1429 ASSERT(ipointer_in == B_FALSE);
1430
1431 kmem_free(ipointer, sizeof(xfs_iptr_t));
1432 return XFS_ERROR(last_error);
1433 }
1434
1435 /*
1436 * xfs sync routine for internal use
1437 *
1438 * This routine supports all of the flags defined for the generic VFS_SYNC
1439 * interface as explained above under xfs_sync. In the interests of not
1440 * changing interfaces within the 6.5 family, additional internallly-
1441 * required functions are specified within a separate xflags parameter,
1442 * only available by calling this routine.
1443 *
1444 */
1445 int
1446 xfs_syncsub(
1447 xfs_mount_t *mp,
1448 int flags,
1449 int xflags,
1450 int *bypassed)
1451 {
1452 int error = 0;
1453 int last_error = 0;
1454 uint log_flags = XFS_LOG_FORCE;
1455 xfs_buf_t *bp;
1456 xfs_buf_log_item_t *bip;
1457
1458 /*
1459 * Sync out the log. This ensures that the log is periodically
1460 * flushed even if there is not enough activity to fill it up.
1461 */
1462 if (flags & SYNC_WAIT)
1463 log_flags |= XFS_LOG_SYNC;
1464
1465 xfs_log_force(mp, (xfs_lsn_t)0, log_flags);
1466
1467 if (flags & (SYNC_ATTR|SYNC_DELWRI)) {
1468 if (flags & SYNC_BDFLUSH)
1469 xfs_finish_reclaim_all(mp, 1);
1470 else
1471 error = xfs_sync_inodes(mp, flags, xflags, bypassed);
1472 }
1473
1474 /*
1475 * Flushing out dirty data above probably generated more
1476 * log activity, so if this isn't vfs_sync() then flush
1477 * the log again.
1478 */
1479 if (flags & SYNC_DELWRI) {
1480 xfs_log_force(mp, (xfs_lsn_t)0, log_flags);
1481 }
1482
1483 if (flags & SYNC_FSDATA) {
1484 /*
1485 * If this is vfs_sync() then only sync the superblock
1486 * if we can lock it without sleeping and it is not pinned.
1487 */
1488 if (flags & SYNC_BDFLUSH) {
1489 bp = xfs_getsb(mp, XFS_BUF_TRYLOCK);
1490 if (bp != NULL) {
1491 bip = XFS_BUF_FSPRIVATE(bp,xfs_buf_log_item_t*);
1492 if ((bip != NULL) &&
1493 xfs_buf_item_dirty(bip)) {
1494 if (!(XFS_BUF_ISPINNED(bp))) {
1495 XFS_BUF_ASYNC(bp);
1496 error = xfs_bwrite(mp, bp);
1497 } else {
1498 xfs_buf_relse(bp);
1499 }
1500 } else {
1501 xfs_buf_relse(bp);
1502 }
1503 }
1504 } else {
1505 bp = xfs_getsb(mp, 0);
1506 /*
1507 * If the buffer is pinned then push on the log so
1508 * we won't get stuck waiting in the write for
1509 * someone, maybe ourselves, to flush the log.
1510 * Even though we just pushed the log above, we
1511 * did not have the superblock buffer locked at
1512 * that point so it can become pinned in between
1513 * there and here.
1514 */
1515 if (XFS_BUF_ISPINNED(bp))
1516 xfs_log_force(mp, (xfs_lsn_t)0, XFS_LOG_FORCE);
1517 if (flags & SYNC_WAIT)
1518 XFS_BUF_UNASYNC(bp);
1519 else
1520 XFS_BUF_ASYNC(bp);
1521 error = xfs_bwrite(mp, bp);
1522 }
1523 if (error) {
1524 last_error = error;
1525 }
1526 }
1527
1528 /*
1529 * If this is the periodic sync, then kick some entries out of
1530 * the reference cache. This ensures that idle entries are
1531 * eventually kicked out of the cache.
1532 */
1533 if (flags & SYNC_REFCACHE) {
1534 xfs_refcache_purge_some(mp);
1535 }
1536
1537 /*
1538 * Now check to see if the log needs a "dummy" transaction.
1539 */
1540
1541 if (!(flags & SYNC_REMOUNT) && xfs_log_need_covered(mp)) {
1542 xfs_trans_t *tp;
1543 xfs_inode_t *ip;
1544
1545 /*
1546 * Put a dummy transaction in the log to tell
1547 * recovery that all others are OK.
1548 */
1549 tp = xfs_trans_alloc(mp, XFS_TRANS_DUMMY1);
1550 if ((error = xfs_trans_reserve(tp, 0,
1551 XFS_ICHANGE_LOG_RES(mp),
1552 0, 0, 0))) {
1553 xfs_trans_cancel(tp, 0);
1554 return error;
1555 }
1556
1557 ip = mp->m_rootip;
1558 xfs_ilock(ip, XFS_ILOCK_EXCL);
1559
1560 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
1561 xfs_trans_ihold(tp, ip);
1562 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1563 error = xfs_trans_commit(tp, 0, NULL);
1564 xfs_iunlock(ip, XFS_ILOCK_EXCL);
1565 xfs_log_force(mp, (xfs_lsn_t)0, log_flags);
1566 }
1567
1568 /*
1569 * When shutting down, we need to insure that the AIL is pushed
1570 * to disk or the filesystem can appear corrupt from the PROM.
1571 */
1572 if ((flags & (SYNC_CLOSE|SYNC_WAIT)) == (SYNC_CLOSE|SYNC_WAIT)) {
1573 XFS_bflush(mp->m_ddev_targp);
1574 if (mp->m_rtdev_targp) {
1575 XFS_bflush(mp->m_rtdev_targp);
1576 }
1577 }
1578
1579 return XFS_ERROR(last_error);
1580 }
1581
1582 /*
1583 * xfs_vget - called by DMAPI and NFSD to get vnode from file handle
1584 */
1585 STATIC int
1586 xfs_vget(
1587 bhv_desc_t *bdp,
1588 vnode_t **vpp,
1589 fid_t *fidp)
1590 {
1591 xfs_mount_t *mp = XFS_BHVTOM(bdp);
1592 xfs_fid_t *xfid = (struct xfs_fid *)fidp;
1593 xfs_inode_t *ip;
1594 int error;
1595 xfs_ino_t ino;
1596 unsigned int igen;
1597
1598 /*
1599 * Invalid. Since handles can be created in user space and passed in
1600 * via gethandle(), this is not cause for a panic.
1601 */
1602 if (xfid->xfs_fid_len != sizeof(*xfid) - sizeof(xfid->xfs_fid_len))
1603 return XFS_ERROR(EINVAL);
1604
1605 ino = xfid->xfs_fid_ino;
1606 igen = xfid->xfs_fid_gen;
1607
1608 /*
1609 * NFS can sometimes send requests for ino 0. Fail them gracefully.
1610 */
1611 if (ino == 0)
1612 return XFS_ERROR(ESTALE);
1613
1614 error = xfs_iget(mp, NULL, ino, 0, XFS_ILOCK_SHARED, &ip, 0);
1615 if (error) {
1616 *vpp = NULL;
1617 return error;
1618 }
1619
1620 if (ip == NULL) {
1621 *vpp = NULL;
1622 return XFS_ERROR(EIO);
1623 }
1624
1625 if (ip->i_d.di_mode == 0 || ip->i_d.di_gen != igen) {
1626 xfs_iput_new(ip, XFS_ILOCK_SHARED);
1627 *vpp = NULL;
1628 return XFS_ERROR(ENOENT);
1629 }
1630
1631 *vpp = XFS_ITOV(ip);
1632 xfs_iunlock(ip, XFS_ILOCK_SHARED);
1633 return 0;
1634 }
1635
1636
1637 #define MNTOPT_LOGBUFS "logbufs" /* number of XFS log buffers */
1638 #define MNTOPT_LOGBSIZE "logbsize" /* size of XFS log buffers */
1639 #define MNTOPT_LOGDEV "logdev" /* log device */
1640 #define MNTOPT_RTDEV "rtdev" /* realtime I/O device */
1641 #define MNTOPT_BIOSIZE "biosize" /* log2 of preferred buffered io size */
1642 #define MNTOPT_WSYNC "wsync" /* safe-mode nfs compatible mount */
1643 #define MNTOPT_INO64 "ino64" /* force inodes into 64-bit range */
1644 #define MNTOPT_NOALIGN "noalign" /* turn off stripe alignment */
1645 #define MNTOPT_SWALLOC "swalloc" /* turn on stripe width allocation */
1646 #define MNTOPT_SUNIT "sunit" /* data volume stripe unit */
1647 #define MNTOPT_SWIDTH "swidth" /* data volume stripe width */
1648 #define MNTOPT_NOUUID "nouuid" /* ignore filesystem UUID */
1649 #define MNTOPT_MTPT "mtpt" /* filesystem mount point */
1650 #define MNTOPT_IHASHSIZE "ihashsize" /* size of inode hash table */
1651 #define MNTOPT_NORECOVERY "norecovery" /* don't run XFS recovery */
1652 #define MNTOPT_NOLOGFLUSH "nologflush" /* don't hard flush on log writes */
1653 #define MNTOPT_OSYNCISOSYNC "osyncisosync" /* o_sync is REALLY o_sync */
1654 #define MNTOPT_64BITINODE "inode64" /* inodes can be allocated anywhere */
1655 #define MNTOPT_IKEEP "ikeep" /* do not free empty inode clusters */
1656 #define MNTOPT_NOIKEEP "noikeep" /* free empty inode clusters */
1657
1658
1659 int
1660 xfs_parseargs(
1661 struct bhv_desc *bhv,
1662 char *options,
1663 struct xfs_mount_args *args,
1664 int update)
1665 {
1666 struct vfs *vfsp = bhvtovfs(bhv);
1667 char *this_char, *value, *eov;
1668 int dsunit, dswidth, vol_dsunit, vol_dswidth;
1669 int iosize;
1670
1671 #if 0 /* XXX: off by default, until some remaining issues ironed out */
1672 args->flags |= XFSMNT_IDELETE; /* default to on */
1673 #endif
1674
1675 if (!options)
1676 return 0;
1677
1678 iosize = dsunit = dswidth = vol_dsunit = vol_dswidth = 0;
1679
1680 while ((this_char = strsep(&options, ",")) != NULL) {
1681 if (!*this_char)
1682 continue;
1683 if ((value = strchr(this_char, '=')) != NULL)
1684 *value++ = 0;
1685
1686 if (!strcmp(this_char, MNTOPT_LOGBUFS)) {
1687 if (!value || !*value) {
1688 printk("XFS: %s option requires an argument\n",
1689 MNTOPT_LOGBUFS);
1690 return EINVAL;
1691 }
1692 args->logbufs = simple_strtoul(value, &eov, 10);
1693 } else if (!strcmp(this_char, MNTOPT_LOGBSIZE)) {
1694 int last, in_kilobytes = 0;
1695
1696 if (!value || !*value) {
1697 printk("XFS: %s option requires an argument\n",
1698 MNTOPT_LOGBSIZE);
1699 return EINVAL;
1700 }
1701 last = strlen(value) - 1;
1702 if (value[last] == 'K' || value[last] == 'k') {
1703 in_kilobytes = 1;
1704 value[last] = '\0';
1705 }
1706 args->logbufsize = simple_strtoul(value, &eov, 10);
1707 if (in_kilobytes)
1708 args->logbufsize <<= 10;
1709 } else if (!strcmp(this_char, MNTOPT_LOGDEV)) {
1710 if (!value || !*value) {
1711 printk("XFS: %s option requires an argument\n",
1712 MNTOPT_LOGDEV);
1713 return EINVAL;
1714 }
1715 strncpy(args->logname, value, MAXNAMELEN);
1716 } else if (!strcmp(this_char, MNTOPT_MTPT)) {
1717 if (!value || !*value) {
1718 printk("XFS: %s option requires an argument\n",
1719 MNTOPT_MTPT);
1720 return EINVAL;
1721 }
1722 strncpy(args->mtpt, value, MAXNAMELEN);
1723 } else if (!strcmp(this_char, MNTOPT_RTDEV)) {
1724 if (!value || !*value) {
1725 printk("XFS: %s option requires an argument\n",
1726 MNTOPT_RTDEV);
1727 return EINVAL;
1728 }
1729 strncpy(args->rtname, value, MAXNAMELEN);
1730 } else if (!strcmp(this_char, MNTOPT_BIOSIZE)) {
1731 if (!value || !*value) {
1732 printk("XFS: %s option requires an argument\n",
1733 MNTOPT_BIOSIZE);
1734 return EINVAL;
1735 }
1736 iosize = simple_strtoul(value, &eov, 10);
1737 args->flags |= XFSMNT_IOSIZE;
1738 args->iosizelog = (uint8_t) iosize;
1739 } else if (!strcmp(this_char, MNTOPT_IHASHSIZE)) {
1740 if (!value || !*value) {
1741 printk("XFS: %s option requires an argument\n",
1742 this_char);
1743 return EINVAL;
1744 }
1745 args->ihashsize = simple_strtoul(value, &eov, 10);
1746 } else if (!strcmp(this_char, MNTOPT_WSYNC)) {
1747 args->flags |= XFSMNT_WSYNC;
1748 } else if (!strcmp(this_char, MNTOPT_OSYNCISOSYNC)) {
1749 args->flags |= XFSMNT_OSYNCISOSYNC;
1750 } else if (!strcmp(this_char, MNTOPT_NORECOVERY)) {
1751 args->flags |= XFSMNT_NORECOVERY;
1752 } else if (!strcmp(this_char, MNTOPT_INO64)) {
1753 args->flags |= XFSMNT_INO64;
1754 #if !XFS_BIG_INUMS
1755 printk("XFS: %s option not allowed on this system\n",
1756 MNTOPT_INO64);
1757 return EINVAL;
1758 #endif
1759 } else if (!strcmp(this_char, MNTOPT_NOALIGN)) {
1760 args->flags |= XFSMNT_NOALIGN;
1761 } else if (!strcmp(this_char, MNTOPT_SWALLOC)) {
1762 args->flags |= XFSMNT_SWALLOC;
1763 } else if (!strcmp(this_char, MNTOPT_SUNIT)) {
1764 if (!value || !*value) {
1765 printk("XFS: %s option requires an argument\n",
1766 MNTOPT_SUNIT);
1767 return EINVAL;
1768 }
1769 dsunit = simple_strtoul(value, &eov, 10);
1770 } else if (!strcmp(this_char, MNTOPT_SWIDTH)) {
1771 if (!value || !*value) {
1772 printk("XFS: %s option requires an argument\n",
1773 MNTOPT_SWIDTH);
1774 return EINVAL;
1775 }
1776 dswidth = simple_strtoul(value, &eov, 10);
1777 } else if (!strcmp(this_char, MNTOPT_64BITINODE)) {
1778 args->flags &= ~XFSMNT_32BITINODES;
1779 #if !XFS_BIG_INUMS
1780 printk("XFS: %s option not allowed on this system\n",
1781 MNTOPT_64BITINODE);
1782 return EINVAL;
1783 #endif
1784 } else if (!strcmp(this_char, MNTOPT_NOUUID)) {
1785 args->flags |= XFSMNT_NOUUID;
1786 } else if (!strcmp(this_char, MNTOPT_NOLOGFLUSH)) {
1787 args->flags |= XFSMNT_NOLOGFLUSH;
1788 } else if (!strcmp(this_char, MNTOPT_IKEEP)) {
1789 args->flags &= ~XFSMNT_IDELETE;
1790 } else if (!strcmp(this_char, MNTOPT_NOIKEEP)) {
1791 args->flags |= XFSMNT_IDELETE;
1792 } else if (!strcmp(this_char, "osyncisdsync")) {
1793 /* no-op, this is now the default */
1794 printk("XFS: osyncisdsync is now the default, option is deprecated.\n");
1795 } else if (!strcmp(this_char, "irixsgid")) {
1796 printk("XFS: irixsgid is now a sysctl(2) variable, option is deprecated.\n");
1797 } else {
1798 printk("XFS: unknown mount option [%s].\n", this_char);
1799 return EINVAL;
1800 }
1801 }
1802
1803 if (args->flags & XFSMNT_NORECOVERY) {
1804 if ((vfsp->vfs_flag & VFS_RDONLY) == 0) {
1805 printk("XFS: no-recovery mounts must be read-only.\n");
1806 return EINVAL;
1807 }
1808 }
1809
1810 if ((args->flags & XFSMNT_NOALIGN) && (dsunit || dswidth)) {
1811 printk(
1812 "XFS: sunit and swidth options incompatible with the noalign option\n");
1813 return EINVAL;
1814 }
1815
1816 if ((dsunit && !dswidth) || (!dsunit && dswidth)) {
1817 printk("XFS: sunit and swidth must be specified together\n");
1818 return EINVAL;
1819 }
1820
1821 if (dsunit && (dswidth % dsunit != 0)) {
1822 printk(
1823 "XFS: stripe width (%d) must be a multiple of the stripe unit (%d)\n",
1824 dswidth, dsunit);
1825 return EINVAL;
1826 }
1827
1828 if ((args->flags & XFSMNT_NOALIGN) != XFSMNT_NOALIGN) {
1829 if (dsunit) {
1830 args->sunit = dsunit;
1831 args->flags |= XFSMNT_RETERR;
1832 } else {
1833 args->sunit = vol_dsunit;
1834 }
1835 dswidth ? (args->swidth = dswidth) :
1836 (args->swidth = vol_dswidth);
1837 } else {
1838 args->sunit = args->swidth = 0;
1839 }
1840
1841 return 0;
1842 }
1843
1844 int
1845 xfs_showargs(
1846 struct bhv_desc *bhv,
1847 struct seq_file *m)
1848 {
1849 static struct proc_xfs_info {
1850 int flag;
1851 char *str;
1852 } xfs_info[] = {
1853 /* the few simple ones we can get from the mount struct */
1854 { XFS_MOUNT_WSYNC, "," MNTOPT_WSYNC },
1855 { XFS_MOUNT_INO64, "," MNTOPT_INO64 },
1856 { XFS_MOUNT_NOALIGN, "," MNTOPT_NOALIGN },
1857 { XFS_MOUNT_SWALLOC, "," MNTOPT_SWALLOC },
1858 { XFS_MOUNT_NOUUID, "," MNTOPT_NOUUID },
1859 { XFS_MOUNT_NORECOVERY, "," MNTOPT_NORECOVERY },
1860 { XFS_MOUNT_OSYNCISOSYNC, "," MNTOPT_OSYNCISOSYNC },
1861 { XFS_MOUNT_NOLOGFLUSH, "," MNTOPT_NOLOGFLUSH },
1862 { XFS_MOUNT_IDELETE, "," MNTOPT_NOIKEEP },
1863 { 0, NULL }
1864 };
1865 struct proc_xfs_info *xfs_infop;
1866 struct xfs_mount *mp = XFS_BHVTOM(bhv);
1867
1868 for (xfs_infop = xfs_info; xfs_infop->flag; xfs_infop++) {
1869 if (mp->m_flags & xfs_infop->flag)
1870 seq_puts(m, xfs_infop->str);
1871 }
1872
1873 if (mp->m_flags & XFS_MOUNT_DFLT_IOSIZE)
1874 seq_printf(m, "," MNTOPT_BIOSIZE "=%d", mp->m_writeio_log);
1875
1876 if (mp->m_logbufs > 0)
1877 seq_printf(m, "," MNTOPT_LOGBUFS "=%d", mp->m_logbufs);
1878
1879 if (mp->m_logbsize > 0)
1880 seq_printf(m, "," MNTOPT_LOGBSIZE "=%d", mp->m_logbsize);
1881
1882 if (mp->m_ddev_targp != mp->m_logdev_targp)
1883 seq_printf(m, "," MNTOPT_LOGDEV "=%s",
1884 XFS_BUFTARG_NAME(mp->m_logdev_targp));
1885
1886 if (mp->m_rtdev_targp && mp->m_ddev_targp != mp->m_rtdev_targp)
1887 seq_printf(m, "," MNTOPT_RTDEV "=%s",
1888 XFS_BUFTARG_NAME(mp->m_rtdev_targp));
1889
1890 if (mp->m_dalign > 0)
1891 seq_printf(m, "," MNTOPT_SUNIT "=%d",
1892 (int)XFS_FSB_TO_BB(mp, mp->m_dalign));
1893
1894 if (mp->m_swidth > 0)
1895 seq_printf(m, "," MNTOPT_SWIDTH "=%d",
1896 (int)XFS_FSB_TO_BB(mp, mp->m_swidth));
1897
1898 if (!(mp->m_flags & XFS_MOUNT_32BITINOOPT))
1899 seq_printf(m, "," MNTOPT_64BITINODE);
1900
1901 return 0;
1902 }
1903
1904 STATIC void
1905 xfs_freeze(
1906 bhv_desc_t *bdp)
1907 {
1908 xfs_mount_t *mp = XFS_BHVTOM(bdp);
1909
1910 while (atomic_read(&mp->m_active_trans) > 0)
1911 delay(100);
1912
1913 /* Push the superblock and write an unmount record */
1914 xfs_log_unmount_write(mp);
1915 xfs_unmountfs_writesb(mp);
1916 }
1917
1918
1919 vfsops_t xfs_vfsops = {
1920 BHV_IDENTITY_INIT(VFS_BHV_XFS,VFS_POSITION_XFS),
1921 .vfs_parseargs = xfs_parseargs,
1922 .vfs_showargs = xfs_showargs,
1923 .vfs_mount = xfs_mount,
1924 .vfs_unmount = xfs_unmount,
1925 .vfs_mntupdate = xfs_mntupdate,
1926 .vfs_root = xfs_root,
1927 .vfs_statvfs = xfs_statvfs,
1928 .vfs_sync = xfs_sync,
1929 .vfs_vget = xfs_vget,
1930 .vfs_dmapiops = (vfs_dmapiops_t)fs_nosys,
1931 .vfs_quotactl = (vfs_quotactl_t)fs_nosys,
1932 .vfs_init_vnode = xfs_initialize_vnode,
1933 .vfs_force_shutdown = xfs_do_force_shutdown,
1934 .vfs_freeze = xfs_freeze,
1935 };
1936
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