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[NETFILTER] ctnetlink: ICMP ID is not mandatory
[hh.org.git] / fs / xfs / xfs_vfsops.c
blobf1a904e23adeff9d1c838f958940a0d42e13a14a
1 /*
2 * XFS filesystem operations.
3 *
4 * Copyright (c) 2000-2005 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 if (ap->flags & XFSMNT_WSYNC)
262 mp->m_flags |= XFS_MOUNT_WSYNC;
263 #if XFS_BIG_INUMS
264 if (ap->flags & XFSMNT_INO64) {
265 mp->m_flags |= XFS_MOUNT_INO64;
266 mp->m_inoadd = XFS_INO64_OFFSET;
267 }
268 #endif
269 if (ap->flags & XFSMNT_NOATIME)
270 mp->m_flags |= XFS_MOUNT_NOATIME;
271
272 if (ap->flags & XFSMNT_RETERR)
273 mp->m_flags |= XFS_MOUNT_RETERR;
274
275 if (ap->flags & XFSMNT_NOALIGN)
276 mp->m_flags |= XFS_MOUNT_NOALIGN;
277
278 if (ap->flags & XFSMNT_SWALLOC)
279 mp->m_flags |= XFS_MOUNT_SWALLOC;
280
281 if (ap->flags & XFSMNT_OSYNCISOSYNC)
282 mp->m_flags |= XFS_MOUNT_OSYNCISOSYNC;
283
284 if (ap->flags & XFSMNT_32BITINODES)
285 mp->m_flags |= (XFS_MOUNT_32BITINODES | XFS_MOUNT_32BITINOOPT);
286
287 if (ap->flags & XFSMNT_IOSIZE) {
288 if (ap->iosizelog > XFS_MAX_IO_LOG ||
289 ap->iosizelog < XFS_MIN_IO_LOG) {
290 cmn_err(CE_WARN,
291 "XFS: invalid log iosize: %d [not %d-%d]",
292 ap->iosizelog, XFS_MIN_IO_LOG,
293 XFS_MAX_IO_LOG);
294 return XFS_ERROR(EINVAL);
295 }
296
297 mp->m_flags |= XFS_MOUNT_DFLT_IOSIZE;
298 mp->m_readio_log = mp->m_writeio_log = ap->iosizelog;
299 }
300
301 if (ap->flags & XFSMNT_IHASHSIZE)
302 mp->m_flags |= XFS_MOUNT_IHASHSIZE;
303
304 if (ap->flags & XFSMNT_IDELETE)
305 mp->m_flags |= XFS_MOUNT_IDELETE;
306
307 if (ap->flags & XFSMNT_DIRSYNC)
308 mp->m_flags |= XFS_MOUNT_DIRSYNC;
309
310 /*
311 * no recovery flag requires a read-only mount
312 */
313 if (ap->flags & XFSMNT_NORECOVERY) {
314 if (!(vfs->vfs_flag & VFS_RDONLY)) {
315 cmn_err(CE_WARN,
316 "XFS: tried to mount a FS read-write without recovery!");
317 return XFS_ERROR(EINVAL);
318 }
319 mp->m_flags |= XFS_MOUNT_NORECOVERY;
320 }
321
322 if (ap->flags & XFSMNT_NOUUID)
323 mp->m_flags |= XFS_MOUNT_NOUUID;
324 if (ap->flags & XFSMNT_NOLOGFLUSH)
325 mp->m_flags |= XFS_MOUNT_NOLOGFLUSH;
326
327 return 0;
328 }
329
330 /*
331 * This function fills in xfs_mount_t fields based on mount args.
332 * Note: the superblock _has_ now been read in.
333 */
334 STATIC int
335 xfs_finish_flags(
336 struct vfs *vfs,
337 struct xfs_mount_args *ap,
338 struct xfs_mount *mp)
339 {
340 int ronly = (vfs->vfs_flag & VFS_RDONLY);
341
342 /* Fail a mount where the logbuf is smaller then the log stripe */
343 if (XFS_SB_VERSION_HASLOGV2(&mp->m_sb)) {
344 if ((ap->logbufsize == -1) &&
345 (mp->m_sb.sb_logsunit > XLOG_BIG_RECORD_BSIZE)) {
346 mp->m_logbsize = mp->m_sb.sb_logsunit;
347 } else if (ap->logbufsize < mp->m_sb.sb_logsunit) {
348 cmn_err(CE_WARN,
349 "XFS: logbuf size must be greater than or equal to log stripe size");
350 return XFS_ERROR(EINVAL);
351 }
352 } else {
353 /* Fail a mount if the logbuf is larger than 32K */
354 if (ap->logbufsize > XLOG_BIG_RECORD_BSIZE) {
355 cmn_err(CE_WARN,
356 "XFS: logbuf size for version 1 logs must be 16K or 32K");
357 return XFS_ERROR(EINVAL);
358 }
359 }
360
361 /*
362 * prohibit r/w mounts of read-only filesystems
363 */
364 if ((mp->m_sb.sb_flags & XFS_SBF_READONLY) && !ronly) {
365 cmn_err(CE_WARN,
366 "XFS: cannot mount a read-only filesystem as read-write");
367 return XFS_ERROR(EROFS);
368 }
369
370 /*
371 * check for shared mount.
372 */
373 if (ap->flags & XFSMNT_SHARED) {
374 if (!XFS_SB_VERSION_HASSHARED(&mp->m_sb))
375 return XFS_ERROR(EINVAL);
376
377 /*
378 * For IRIX 6.5, shared mounts must have the shared
379 * version bit set, have the persistent readonly
380 * field set, must be version 0 and can only be mounted
381 * read-only.
382 */
383 if (!ronly || !(mp->m_sb.sb_flags & XFS_SBF_READONLY) ||
384 (mp->m_sb.sb_shared_vn != 0))
385 return XFS_ERROR(EINVAL);
386
387 mp->m_flags |= XFS_MOUNT_SHARED;
388
389 /*
390 * Shared XFS V0 can't deal with DMI. Return EINVAL.
391 */
392 if (mp->m_sb.sb_shared_vn == 0 && (ap->flags & XFSMNT_DMAPI))
393 return XFS_ERROR(EINVAL);
394 }
395
396 return 0;
397 }
398
399 /*
400 * xfs_mount
401 *
402 * The file system configurations are:
403 * (1) device (partition) with data and internal log
404 * (2) logical volume with data and log subvolumes.
405 * (3) logical volume with data, log, and realtime subvolumes.
406 *
407 * We only have to handle opening the log and realtime volumes here if
408 * they are present. The data subvolume has already been opened by
409 * get_sb_bdev() and is stored in vfsp->vfs_super->s_bdev.
410 */
411 STATIC int
412 xfs_mount(
413 struct bhv_desc *bhvp,
414 struct xfs_mount_args *args,
415 cred_t *credp)
416 {
417 struct vfs *vfsp = bhvtovfs(bhvp);
418 struct bhv_desc *p;
419 struct xfs_mount *mp = XFS_BHVTOM(bhvp);
420 struct block_device *ddev, *logdev, *rtdev;
421 int flags = 0, error;
422
423 ddev = vfsp->vfs_super->s_bdev;
424 logdev = rtdev = NULL;
425
426 /*
427 * Setup xfs_mount function vectors from available behaviors
428 */
429 p = vfs_bhv_lookup(vfsp, VFS_POSITION_DM);
430 mp->m_dm_ops = p ? *(xfs_dmops_t *) vfs_bhv_custom(p) : xfs_dmcore_stub;
431 p = vfs_bhv_lookup(vfsp, VFS_POSITION_QM);
432 mp->m_qm_ops = p ? *(xfs_qmops_t *) vfs_bhv_custom(p) : xfs_qmcore_stub;
433 p = vfs_bhv_lookup(vfsp, VFS_POSITION_IO);
434 mp->m_io_ops = p ? *(xfs_ioops_t *) vfs_bhv_custom(p) : xfs_iocore_xfs;
435
436 /*
437 * Open real time and log devices - order is important.
438 */
439 if (args->logname[0]) {
440 error = xfs_blkdev_get(mp, args->logname, &logdev);
441 if (error)
442 return error;
443 }
444 if (args->rtname[0]) {
445 error = xfs_blkdev_get(mp, args->rtname, &rtdev);
446 if (error) {
447 xfs_blkdev_put(logdev);
448 return error;
449 }
450
451 if (rtdev == ddev || rtdev == logdev) {
452 cmn_err(CE_WARN,
453 "XFS: Cannot mount filesystem with identical rtdev and ddev/logdev.");
454 xfs_blkdev_put(logdev);
455 xfs_blkdev_put(rtdev);
456 return EINVAL;
457 }
458 }
459
460 /*
461 * Setup xfs_mount buffer target pointers
462 */
463 error = ENOMEM;
464 mp->m_ddev_targp = xfs_alloc_buftarg(ddev, 0);
465 if (!mp->m_ddev_targp) {
466 xfs_blkdev_put(logdev);
467 xfs_blkdev_put(rtdev);
468 return error;
469 }
470 if (rtdev) {
471 mp->m_rtdev_targp = xfs_alloc_buftarg(rtdev, 1);
472 if (!mp->m_rtdev_targp)
473 goto error0;
474 }
475 mp->m_logdev_targp = (logdev && logdev != ddev) ?
476 xfs_alloc_buftarg(logdev, 1) : mp->m_ddev_targp;
477 if (!mp->m_logdev_targp)
478 goto error0;
479
480 /*
481 * Setup flags based on mount(2) options and then the superblock
482 */
483 error = xfs_start_flags(vfsp, args, mp);
484 if (error)
485 goto error1;
486 error = xfs_readsb(mp);
487 if (error)
488 goto error1;
489 error = xfs_finish_flags(vfsp, args, mp);
490 if (error)
491 goto error2;
492
493 /*
494 * Setup xfs_mount buffer target pointers based on superblock
495 */
496 error = xfs_setsize_buftarg(mp->m_ddev_targp, mp->m_sb.sb_blocksize,
497 mp->m_sb.sb_sectsize);
498 if (!error && logdev && logdev != ddev) {
499 unsigned int log_sector_size = BBSIZE;
500
501 if (XFS_SB_VERSION_HASSECTOR(&mp->m_sb))
502 log_sector_size = mp->m_sb.sb_logsectsize;
503 error = xfs_setsize_buftarg(mp->m_logdev_targp,
504 mp->m_sb.sb_blocksize,
505 log_sector_size);
506 }
507 if (!error && rtdev)
508 error = xfs_setsize_buftarg(mp->m_rtdev_targp,
509 mp->m_sb.sb_blocksize,
510 mp->m_sb.sb_sectsize);
511 if (error)
512 goto error2;
513
514 error = XFS_IOINIT(vfsp, args, flags);
515 if (!error)
516 return 0;
517 error2:
518 if (mp->m_sb_bp)
519 xfs_freesb(mp);
520 error1:
521 xfs_binval(mp->m_ddev_targp);
522 if (logdev && logdev != ddev)
523 xfs_binval(mp->m_logdev_targp);
524 if (rtdev)
525 xfs_binval(mp->m_rtdev_targp);
526 error0:
527 xfs_unmountfs_close(mp, credp);
528 return error;
529 }
530
531 STATIC int
532 xfs_unmount(
533 bhv_desc_t *bdp,
534 int flags,
535 cred_t *credp)
536 {
537 struct vfs *vfsp = bhvtovfs(bdp);
538 xfs_mount_t *mp = XFS_BHVTOM(bdp);
539 xfs_inode_t *rip;
540 vnode_t *rvp;
541 int unmount_event_wanted = 0;
542 int unmount_event_flags = 0;
543 int xfs_unmountfs_needed = 0;
544 int error;
545
546 rip = mp->m_rootip;
547 rvp = XFS_ITOV(rip);
548
549 if (vfsp->vfs_flag & VFS_DMI) {
550 error = XFS_SEND_PREUNMOUNT(mp, vfsp,
551 rvp, DM_RIGHT_NULL, rvp, DM_RIGHT_NULL,
552 NULL, NULL, 0, 0,
553 (mp->m_dmevmask & (1<<DM_EVENT_PREUNMOUNT))?
554 0:DM_FLAGS_UNWANTED);
555 if (error)
556 return XFS_ERROR(error);
557 unmount_event_wanted = 1;
558 unmount_event_flags = (mp->m_dmevmask & (1<<DM_EVENT_UNMOUNT))?
559 0 : DM_FLAGS_UNWANTED;
560 }
561
562 /*
563 * First blow any referenced inode from this file system
564 * out of the reference cache, and delete the timer.
565 */
566 xfs_refcache_purge_mp(mp);
567
568 XFS_bflush(mp->m_ddev_targp);
569 error = xfs_unmount_flush(mp, 0);
570 if (error)
571 goto out;
572
573 ASSERT(vn_count(rvp) == 1);
574
575 /*
576 * Drop the reference count
577 */
578 VN_RELE(rvp);
579
580 /*
581 * If we're forcing a shutdown, typically because of a media error,
582 * we want to make sure we invalidate dirty pages that belong to
583 * referenced vnodes as well.
584 */
585 if (XFS_FORCED_SHUTDOWN(mp)) {
586 error = xfs_sync(&mp->m_bhv,
587 (SYNC_WAIT | SYNC_CLOSE), credp);
588 ASSERT(error != EFSCORRUPTED);
589 }
590 xfs_unmountfs_needed = 1;
591
592 out:
593 /* Send DMAPI event, if required.
594 * Then do xfs_unmountfs() if needed.
595 * Then return error (or zero).
596 */
597 if (unmount_event_wanted) {
598 /* Note: mp structure must still exist for
599 * XFS_SEND_UNMOUNT() call.
600 */
601 XFS_SEND_UNMOUNT(mp, vfsp, error == 0 ? rvp : NULL,
602 DM_RIGHT_NULL, 0, error, unmount_event_flags);
603 }
604 if (xfs_unmountfs_needed) {
605 /*
606 * Call common unmount function to flush to disk
607 * and free the super block buffer & mount structures.
608 */
609 xfs_unmountfs(mp, credp);
610 }
611
612 return XFS_ERROR(error);
613 }
614
615 STATIC int
616 xfs_quiesce_fs(
617 xfs_mount_t *mp)
618 {
619 int count = 0, pincount;
620
621 xfs_refcache_purge_mp(mp);
622 xfs_flush_buftarg(mp->m_ddev_targp, 0);
623 xfs_finish_reclaim_all(mp, 0);
624
625 /* This loop must run at least twice.
626 * The first instance of the loop will flush
627 * most meta data but that will generate more
628 * meta data (typically directory updates).
629 * Which then must be flushed and logged before
630 * we can write the unmount record.
631 */
632 do {
633 xfs_syncsub(mp, SYNC_REMOUNT|SYNC_ATTR|SYNC_WAIT, 0, NULL);
634 pincount = xfs_flush_buftarg(mp->m_ddev_targp, 1);
635 if (!pincount) {
636 delay(50);
637 count++;
638 }
639 } while (count < 2);
640
641 return 0;
642 }
643
644 STATIC int
645 xfs_mntupdate(
646 bhv_desc_t *bdp,
647 int *flags,
648 struct xfs_mount_args *args)
649 {
650 struct vfs *vfsp = bhvtovfs(bdp);
651 xfs_mount_t *mp = XFS_BHVTOM(bdp);
652 int error;
653
654 if (args->flags & XFSMNT_NOATIME)
655 mp->m_flags |= XFS_MOUNT_NOATIME;
656 else
657 mp->m_flags &= ~XFS_MOUNT_NOATIME;
658
659 if (!(vfsp->vfs_flag & VFS_RDONLY)) {
660 VFS_SYNC(vfsp, SYNC_FSDATA|SYNC_BDFLUSH|SYNC_ATTR, NULL, error);
661 }
662
663 if (*flags & MS_RDONLY) {
664 xfs_quiesce_fs(mp);
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
799 mp = XFS_BHVTOM(bdp);
800 sbp = &(mp->m_sb);
801
802 statp->f_type = XFS_SB_MAGIC;
803
804 s = XFS_SB_LOCK(mp);
805 statp->f_bsize = sbp->sb_blocksize;
806 lsize = sbp->sb_logstart ? sbp->sb_logblocks : 0;
807 statp->f_blocks = sbp->sb_dblocks - lsize;
808 statp->f_bfree = statp->f_bavail = sbp->sb_fdblocks;
809 fakeinos = statp->f_bfree << sbp->sb_inopblog;
810 #if XFS_BIG_INUMS
811 fakeinos += mp->m_inoadd;
812 #endif
813 statp->f_files =
814 MIN(sbp->sb_icount + fakeinos, (__uint64_t)XFS_MAXINUMBER);
815 if (mp->m_maxicount)
816 #if XFS_BIG_INUMS
817 if (!mp->m_inoadd)
818 #endif
819 statp->f_files = min_t(typeof(statp->f_files),
820 statp->f_files,
821 mp->m_maxicount);
822 statp->f_ffree = statp->f_files - (sbp->sb_icount - sbp->sb_ifree);
823 XFS_SB_UNLOCK(mp, s);
824
825 xfs_statvfs_fsid(statp, mp);
826 statp->f_namelen = MAXNAMELEN - 1;
827
828 return 0;
829 }
830
831
832 /*
833 * xfs_sync flushes any pending I/O to file system vfsp.
834 *
835 * This routine is called by vfs_sync() to make sure that things make it
836 * out to disk eventually, on sync() system calls to flush out everything,
837 * and when the file system is unmounted. For the vfs_sync() case, all
838 * we really need to do is sync out the log to make all of our meta-data
839 * updates permanent (except for timestamps). For calls from pflushd(),
840 * dirty pages are kept moving by calling pdflush() on the inodes
841 * containing them. We also flush the inodes that we can lock without
842 * sleeping and the superblock if we can lock it without sleeping from
843 * vfs_sync() so that items at the tail of the log are always moving out.
844 *
845 * Flags:
846 * SYNC_BDFLUSH - We're being called from vfs_sync() so we don't want
847 * to sleep if we can help it. All we really need
848 * to do is ensure that the log is synced at least
849 * periodically. We also push the inodes and
850 * superblock if we can lock them without sleeping
851 * and they are not pinned.
852 * SYNC_ATTR - We need to flush the inodes. If SYNC_BDFLUSH is not
853 * set, then we really want to lock each inode and flush
854 * it.
855 * SYNC_WAIT - All the flushes that take place in this call should
856 * be synchronous.
857 * SYNC_DELWRI - This tells us to push dirty pages associated with
858 * inodes. SYNC_WAIT and SYNC_BDFLUSH are used to
859 * determine if they should be flushed sync, async, or
860 * delwri.
861 * SYNC_CLOSE - This flag is passed when the system is being
862 * unmounted. We should sync and invalidate everthing.
863 * SYNC_FSDATA - This indicates that the caller would like to make
864 * sure the superblock is safe on disk. We can ensure
865 * this by simply makeing sure the log gets flushed
866 * if SYNC_BDFLUSH is set, and by actually writing it
867 * out otherwise.
868 *
869 */
870 /*ARGSUSED*/
871 STATIC int
872 xfs_sync(
873 bhv_desc_t *bdp,
874 int flags,
875 cred_t *credp)
876 {
877 xfs_mount_t *mp = XFS_BHVTOM(bdp);
878
879 if (unlikely(flags == SYNC_QUIESCE))
880 return xfs_quiesce_fs(mp);
881 else
882 return xfs_syncsub(mp, flags, 0, NULL);
883 }
884
885 /*
886 * xfs sync routine for internal use
887 *
888 * This routine supports all of the flags defined for the generic VFS_SYNC
889 * interface as explained above under xfs_sync. In the interests of not
890 * changing interfaces within the 6.5 family, additional internallly-
891 * required functions are specified within a separate xflags parameter,
892 * only available by calling this routine.
893 *
894 */
895 STATIC int
896 xfs_sync_inodes(
897 xfs_mount_t *mp,
898 int flags,
899 int xflags,
900 int *bypassed)
901 {
902 xfs_inode_t *ip = NULL;
903 xfs_inode_t *ip_next;
904 xfs_buf_t *bp;
905 vnode_t *vp = NULL;
906 int error;
907 int last_error;
908 uint64_t fflag;
909 uint lock_flags;
910 uint base_lock_flags;
911 boolean_t mount_locked;
912 boolean_t vnode_refed;
913 int preempt;
914 xfs_dinode_t *dip;
915 xfs_iptr_t *ipointer;
916 #ifdef DEBUG
917 boolean_t ipointer_in = B_FALSE;
918
919 #define IPOINTER_SET ipointer_in = B_TRUE
920 #define IPOINTER_CLR ipointer_in = B_FALSE
921 #else
922 #define IPOINTER_SET
923 #define IPOINTER_CLR
924 #endif
925
926
927 /* Insert a marker record into the inode list after inode ip. The list
928 * must be locked when this is called. After the call the list will no
929 * longer be locked.
930 */
931 #define IPOINTER_INSERT(ip, mp) { \
932 ASSERT(ipointer_in == B_FALSE); \
933 ipointer->ip_mnext = ip->i_mnext; \
934 ipointer->ip_mprev = ip; \
935 ip->i_mnext = (xfs_inode_t *)ipointer; \
936 ipointer->ip_mnext->i_mprev = (xfs_inode_t *)ipointer; \
937 preempt = 0; \
938 XFS_MOUNT_IUNLOCK(mp); \
939 mount_locked = B_FALSE; \
940 IPOINTER_SET; \
941 }
942
943 /* Remove the marker from the inode list. If the marker was the only item
944 * in the list then there are no remaining inodes and we should zero out
945 * the whole list. If we are the current head of the list then move the head
946 * past us.
947 */
948 #define IPOINTER_REMOVE(ip, mp) { \
949 ASSERT(ipointer_in == B_TRUE); \
950 if (ipointer->ip_mnext != (xfs_inode_t *)ipointer) { \
951 ip = ipointer->ip_mnext; \
952 ip->i_mprev = ipointer->ip_mprev; \
953 ipointer->ip_mprev->i_mnext = ip; \
954 if (mp->m_inodes == (xfs_inode_t *)ipointer) { \
955 mp->m_inodes = ip; \
956 } \
957 } else { \
958 ASSERT(mp->m_inodes == (xfs_inode_t *)ipointer); \
959 mp->m_inodes = NULL; \
960 ip = NULL; \
961 } \
962 IPOINTER_CLR; \
963 }
964
965 #define XFS_PREEMPT_MASK 0x7f
966
967 if (bypassed)
968 *bypassed = 0;
969 if (XFS_MTOVFS(mp)->vfs_flag & VFS_RDONLY)
970 return 0;
971 error = 0;
972 last_error = 0;
973 preempt = 0;
974
975 /* Allocate a reference marker */
976 ipointer = (xfs_iptr_t *)kmem_zalloc(sizeof(xfs_iptr_t), KM_SLEEP);
977
978 fflag = XFS_B_ASYNC; /* default is don't wait */
979 if (flags & SYNC_BDFLUSH)
980 fflag = XFS_B_DELWRI;
981 if (flags & SYNC_WAIT)
982 fflag = 0; /* synchronous overrides all */
983
984 base_lock_flags = XFS_ILOCK_SHARED;
985 if (flags & (SYNC_DELWRI | SYNC_CLOSE)) {
986 /*
987 * We need the I/O lock if we're going to call any of
988 * the flush/inval routines.
989 */
990 base_lock_flags |= XFS_IOLOCK_SHARED;
991 }
992
993 XFS_MOUNT_ILOCK(mp);
994
995 ip = mp->m_inodes;
996
997 mount_locked = B_TRUE;
998 vnode_refed = B_FALSE;
999
1000 IPOINTER_CLR;
1001
1002 do {
1003 ASSERT(ipointer_in == B_FALSE);
1004 ASSERT(vnode_refed == B_FALSE);
1005
1006 lock_flags = base_lock_flags;
1007
1008 /*
1009 * There were no inodes in the list, just break out
1010 * of the loop.
1011 */
1012 if (ip == NULL) {
1013 break;
1014 }
1015
1016 /*
1017 * We found another sync thread marker - skip it
1018 */
1019 if (ip->i_mount == NULL) {
1020 ip = ip->i_mnext;
1021 continue;
1022 }
1023
1024 vp = XFS_ITOV_NULL(ip);
1025
1026 /*
1027 * If the vnode is gone then this is being torn down,
1028 * call reclaim if it is flushed, else let regular flush
1029 * code deal with it later in the loop.
1030 */
1031
1032 if (vp == NULL) {
1033 /* Skip ones already in reclaim */
1034 if (ip->i_flags & XFS_IRECLAIM) {
1035 ip = ip->i_mnext;
1036 continue;
1037 }
1038 if (xfs_ilock_nowait(ip, XFS_ILOCK_EXCL) == 0) {
1039 ip = ip->i_mnext;
1040 } else if ((xfs_ipincount(ip) == 0) &&
1041 xfs_iflock_nowait(ip)) {
1042 IPOINTER_INSERT(ip, mp);
1043
1044 xfs_finish_reclaim(ip, 1,
1045 XFS_IFLUSH_DELWRI_ELSE_ASYNC);
1046
1047 XFS_MOUNT_ILOCK(mp);
1048 mount_locked = B_TRUE;
1049 IPOINTER_REMOVE(ip, mp);
1050 } else {
1051 xfs_iunlock(ip, XFS_ILOCK_EXCL);
1052 ip = ip->i_mnext;
1053 }
1054 continue;
1055 }
1056
1057 if (VN_BAD(vp)) {
1058 ip = ip->i_mnext;
1059 continue;
1060 }
1061
1062 if (XFS_FORCED_SHUTDOWN(mp) && !(flags & SYNC_CLOSE)) {
1063 XFS_MOUNT_IUNLOCK(mp);
1064 kmem_free(ipointer, sizeof(xfs_iptr_t));
1065 return 0;
1066 }
1067
1068 /*
1069 * If this is just vfs_sync() or pflushd() calling
1070 * then we can skip inodes for which it looks like
1071 * there is nothing to do. Since we don't have the
1072 * inode locked this is racey, but these are periodic
1073 * calls so it doesn't matter. For the others we want
1074 * to know for sure, so we at least try to lock them.
1075 */
1076 if (flags & SYNC_BDFLUSH) {
1077 if (((ip->i_itemp == NULL) ||
1078 !(ip->i_itemp->ili_format.ilf_fields &
1079 XFS_ILOG_ALL)) &&
1080 (ip->i_update_core == 0)) {
1081 ip = ip->i_mnext;
1082 continue;
1083 }
1084 }
1085
1086 /*
1087 * Try to lock without sleeping. We're out of order with
1088 * the inode list lock here, so if we fail we need to drop
1089 * the mount lock and try again. If we're called from
1090 * bdflush() here, then don't bother.
1091 *
1092 * The inode lock here actually coordinates with the
1093 * almost spurious inode lock in xfs_ireclaim() to prevent
1094 * the vnode we handle here without a reference from
1095 * being freed while we reference it. If we lock the inode
1096 * while it's on the mount list here, then the spurious inode
1097 * lock in xfs_ireclaim() after the inode is pulled from
1098 * the mount list will sleep until we release it here.
1099 * This keeps the vnode from being freed while we reference
1100 * it.
1101 */
1102 if (xfs_ilock_nowait(ip, lock_flags) == 0) {
1103 if ((flags & SYNC_BDFLUSH) || (vp == NULL)) {
1104 ip = ip->i_mnext;
1105 continue;
1106 }
1107
1108 vp = vn_grab(vp);
1109 if (vp == NULL) {
1110 ip = ip->i_mnext;
1111 continue;
1112 }
1113
1114 IPOINTER_INSERT(ip, mp);
1115 xfs_ilock(ip, lock_flags);
1116
1117 ASSERT(vp == XFS_ITOV(ip));
1118 ASSERT(ip->i_mount == mp);
1119
1120 vnode_refed = B_TRUE;
1121 }
1122
1123 /* From here on in the loop we may have a marker record
1124 * in the inode list.
1125 */
1126
1127 if ((flags & SYNC_CLOSE) && (vp != NULL)) {
1128 /*
1129 * This is the shutdown case. We just need to
1130 * flush and invalidate all the pages associated
1131 * with the inode. Drop the inode lock since
1132 * we can't hold it across calls to the buffer
1133 * cache.
1134 *
1135 * We don't set the VREMAPPING bit in the vnode
1136 * here, because we don't hold the vnode lock
1137 * exclusively. It doesn't really matter, though,
1138 * because we only come here when we're shutting
1139 * down anyway.
1140 */
1141 xfs_iunlock(ip, XFS_ILOCK_SHARED);
1142
1143 if (XFS_FORCED_SHUTDOWN(mp)) {
1144 VOP_TOSS_PAGES(vp, 0, -1, FI_REMAPF);
1145 } else {
1146 VOP_FLUSHINVAL_PAGES(vp, 0, -1, FI_REMAPF);
1147 }
1148
1149 xfs_ilock(ip, XFS_ILOCK_SHARED);
1150
1151 } else if ((flags & SYNC_DELWRI) && (vp != NULL)) {
1152 if (VN_DIRTY(vp)) {
1153 /* We need to have dropped the lock here,
1154 * so insert a marker if we have not already
1155 * done so.
1156 */
1157 if (mount_locked) {
1158 IPOINTER_INSERT(ip, mp);
1159 }
1160
1161 /*
1162 * Drop the inode lock since we can't hold it
1163 * across calls to the buffer cache.
1164 */
1165 xfs_iunlock(ip, XFS_ILOCK_SHARED);
1166 VOP_FLUSH_PAGES(vp, (xfs_off_t)0, -1,
1167 fflag, FI_NONE, error);
1168 xfs_ilock(ip, XFS_ILOCK_SHARED);
1169 }
1170
1171 }
1172
1173 if (flags & SYNC_BDFLUSH) {
1174 if ((flags & SYNC_ATTR) &&
1175 ((ip->i_update_core) ||
1176 ((ip->i_itemp != NULL) &&
1177 (ip->i_itemp->ili_format.ilf_fields != 0)))) {
1178
1179 /* Insert marker and drop lock if not already
1180 * done.
1181 */
1182 if (mount_locked) {
1183 IPOINTER_INSERT(ip, mp);
1184 }
1185
1186 /*
1187 * We don't want the periodic flushing of the
1188 * inodes by vfs_sync() to interfere with
1189 * I/O to the file, especially read I/O
1190 * where it is only the access time stamp
1191 * that is being flushed out. To prevent
1192 * long periods where we have both inode
1193 * locks held shared here while reading the
1194 * inode's buffer in from disk, we drop the
1195 * inode lock while reading in the inode
1196 * buffer. We have to release the buffer
1197 * and reacquire the inode lock so that they
1198 * are acquired in the proper order (inode
1199 * locks first). The buffer will go at the
1200 * end of the lru chain, though, so we can
1201 * expect it to still be there when we go
1202 * for it again in xfs_iflush().
1203 */
1204 if ((xfs_ipincount(ip) == 0) &&
1205 xfs_iflock_nowait(ip)) {
1206
1207 xfs_ifunlock(ip);
1208 xfs_iunlock(ip, XFS_ILOCK_SHARED);
1209
1210 error = xfs_itobp(mp, NULL, ip,
1211 &dip, &bp, 0);
1212 if (!error) {
1213 xfs_buf_relse(bp);
1214 } else {
1215 /* Bailing out, remove the
1216 * marker and free it.
1217 */
1218 XFS_MOUNT_ILOCK(mp);
1219
1220 IPOINTER_REMOVE(ip, mp);
1221
1222 XFS_MOUNT_IUNLOCK(mp);
1223
1224 ASSERT(!(lock_flags &
1225 XFS_IOLOCK_SHARED));
1226
1227 kmem_free(ipointer,
1228 sizeof(xfs_iptr_t));
1229 return (0);
1230 }
1231
1232 /*
1233 * Since we dropped the inode lock,
1234 * the inode may have been reclaimed.
1235 * Therefore, we reacquire the mount
1236 * lock and check to see if we were the
1237 * inode reclaimed. If this happened
1238 * then the ipointer marker will no
1239 * longer point back at us. In this
1240 * case, move ip along to the inode
1241 * after the marker, remove the marker
1242 * and continue.
1243 */
1244 XFS_MOUNT_ILOCK(mp);
1245 mount_locked = B_TRUE;
1246
1247 if (ip != ipointer->ip_mprev) {
1248 IPOINTER_REMOVE(ip, mp);
1249
1250 ASSERT(!vnode_refed);
1251 ASSERT(!(lock_flags &
1252 XFS_IOLOCK_SHARED));
1253 continue;
1254 }
1255
1256 ASSERT(ip->i_mount == mp);
1257
1258 if (xfs_ilock_nowait(ip,
1259 XFS_ILOCK_SHARED) == 0) {
1260 ASSERT(ip->i_mount == mp);
1261 /*
1262 * We failed to reacquire
1263 * the inode lock without
1264 * sleeping, so just skip
1265 * the inode for now. We
1266 * clear the ILOCK bit from
1267 * the lock_flags so that we
1268 * won't try to drop a lock
1269 * we don't hold below.
1270 */
1271 lock_flags &= ~XFS_ILOCK_SHARED;
1272 IPOINTER_REMOVE(ip_next, mp);
1273 } else if ((xfs_ipincount(ip) == 0) &&
1274 xfs_iflock_nowait(ip)) {
1275 ASSERT(ip->i_mount == mp);
1276 /*
1277 * Since this is vfs_sync()
1278 * calling we only flush the
1279 * inode out if we can lock
1280 * it without sleeping and
1281 * it is not pinned. Drop
1282 * the mount lock here so
1283 * that we don't hold it for
1284 * too long. We already have
1285 * a marker in the list here.
1286 */
1287 XFS_MOUNT_IUNLOCK(mp);
1288 mount_locked = B_FALSE;
1289 error = xfs_iflush(ip,
1290 XFS_IFLUSH_DELWRI);
1291 } else {
1292 ASSERT(ip->i_mount == mp);
1293 IPOINTER_REMOVE(ip_next, mp);
1294 }
1295 }
1296
1297 }
1298
1299 } else {
1300 if ((flags & SYNC_ATTR) &&
1301 ((ip->i_update_core) ||
1302 ((ip->i_itemp != NULL) &&
1303 (ip->i_itemp->ili_format.ilf_fields != 0)))) {
1304 if (mount_locked) {
1305 IPOINTER_INSERT(ip, mp);
1306 }
1307
1308 if (flags & SYNC_WAIT) {
1309 xfs_iflock(ip);
1310 error = xfs_iflush(ip,
1311 XFS_IFLUSH_SYNC);
1312 } else {
1313 /*
1314 * If we can't acquire the flush
1315 * lock, then the inode is already
1316 * being flushed so don't bother
1317 * waiting. If we can lock it then
1318 * do a delwri flush so we can
1319 * combine multiple inode flushes
1320 * in each disk write.
1321 */
1322 if (xfs_iflock_nowait(ip)) {
1323 error = xfs_iflush(ip,
1324 XFS_IFLUSH_DELWRI);
1325 }
1326 else if (bypassed)
1327 (*bypassed)++;
1328 }
1329 }
1330 }
1331
1332 if (lock_flags != 0) {
1333 xfs_iunlock(ip, lock_flags);
1334 }
1335
1336 if (vnode_refed) {
1337 /*
1338 * If we had to take a reference on the vnode
1339 * above, then wait until after we've unlocked
1340 * the inode to release the reference. This is
1341 * because we can be already holding the inode
1342 * lock when VN_RELE() calls xfs_inactive().
1343 *
1344 * Make sure to drop the mount lock before calling
1345 * VN_RELE() so that we don't trip over ourselves if
1346 * we have to go for the mount lock again in the
1347 * inactive code.
1348 */
1349 if (mount_locked) {
1350 IPOINTER_INSERT(ip, mp);
1351 }
1352
1353 VN_RELE(vp);
1354
1355 vnode_refed = B_FALSE;
1356 }
1357
1358 if (error) {
1359 last_error = error;
1360 }
1361
1362 /*
1363 * bail out if the filesystem is corrupted.
1364 */
1365 if (error == EFSCORRUPTED) {
1366 if (!mount_locked) {
1367 XFS_MOUNT_ILOCK(mp);
1368 IPOINTER_REMOVE(ip, mp);
1369 }
1370 XFS_MOUNT_IUNLOCK(mp);
1371 ASSERT(ipointer_in == B_FALSE);
1372 kmem_free(ipointer, sizeof(xfs_iptr_t));
1373 return XFS_ERROR(error);
1374 }
1375
1376 /* Let other threads have a chance at the mount lock
1377 * if we have looped many times without dropping the
1378 * lock.
1379 */
1380 if ((++preempt & XFS_PREEMPT_MASK) == 0) {
1381 if (mount_locked) {
1382 IPOINTER_INSERT(ip, mp);
1383 }
1384 }
1385
1386 if (mount_locked == B_FALSE) {
1387 XFS_MOUNT_ILOCK(mp);
1388 mount_locked = B_TRUE;
1389 IPOINTER_REMOVE(ip, mp);
1390 continue;
1391 }
1392
1393 ASSERT(ipointer_in == B_FALSE);
1394 ip = ip->i_mnext;
1395
1396 } while (ip != mp->m_inodes);
1397
1398 XFS_MOUNT_IUNLOCK(mp);
1399
1400 ASSERT(ipointer_in == B_FALSE);
1401
1402 kmem_free(ipointer, sizeof(xfs_iptr_t));
1403 return XFS_ERROR(last_error);
1404 }
1405
1406 /*
1407 * xfs sync routine for internal use
1408 *
1409 * This routine supports all of the flags defined for the generic VFS_SYNC
1410 * interface as explained above under xfs_sync. In the interests of not
1411 * changing interfaces within the 6.5 family, additional internallly-
1412 * required functions are specified within a separate xflags parameter,
1413 * only available by calling this routine.
1414 *
1415 */
1416 int
1417 xfs_syncsub(
1418 xfs_mount_t *mp,
1419 int flags,
1420 int xflags,
1421 int *bypassed)
1422 {
1423 int error = 0;
1424 int last_error = 0;
1425 uint log_flags = XFS_LOG_FORCE;
1426 xfs_buf_t *bp;
1427 xfs_buf_log_item_t *bip;
1428
1429 /*
1430 * Sync out the log. This ensures that the log is periodically
1431 * flushed even if there is not enough activity to fill it up.
1432 */
1433 if (flags & SYNC_WAIT)
1434 log_flags |= XFS_LOG_SYNC;
1435
1436 xfs_log_force(mp, (xfs_lsn_t)0, log_flags);
1437
1438 if (flags & (SYNC_ATTR|SYNC_DELWRI)) {
1439 if (flags & SYNC_BDFLUSH)
1440 xfs_finish_reclaim_all(mp, 1);
1441 else
1442 error = xfs_sync_inodes(mp, flags, xflags, bypassed);
1443 }
1444
1445 /*
1446 * Flushing out dirty data above probably generated more
1447 * log activity, so if this isn't vfs_sync() then flush
1448 * the log again.
1449 */
1450 if (flags & SYNC_DELWRI) {
1451 xfs_log_force(mp, (xfs_lsn_t)0, log_flags);
1452 }
1453
1454 if (flags & SYNC_FSDATA) {
1455 /*
1456 * If this is vfs_sync() then only sync the superblock
1457 * if we can lock it without sleeping and it is not pinned.
1458 */
1459 if (flags & SYNC_BDFLUSH) {
1460 bp = xfs_getsb(mp, XFS_BUF_TRYLOCK);
1461 if (bp != NULL) {
1462 bip = XFS_BUF_FSPRIVATE(bp,xfs_buf_log_item_t*);
1463 if ((bip != NULL) &&
1464 xfs_buf_item_dirty(bip)) {
1465 if (!(XFS_BUF_ISPINNED(bp))) {
1466 XFS_BUF_ASYNC(bp);
1467 error = xfs_bwrite(mp, bp);
1468 } else {
1469 xfs_buf_relse(bp);
1470 }
1471 } else {
1472 xfs_buf_relse(bp);
1473 }
1474 }
1475 } else {
1476 bp = xfs_getsb(mp, 0);
1477 /*
1478 * If the buffer is pinned then push on the log so
1479 * we won't get stuck waiting in the write for
1480 * someone, maybe ourselves, to flush the log.
1481 * Even though we just pushed the log above, we
1482 * did not have the superblock buffer locked at
1483 * that point so it can become pinned in between
1484 * there and here.
1485 */
1486 if (XFS_BUF_ISPINNED(bp))
1487 xfs_log_force(mp, (xfs_lsn_t)0, XFS_LOG_FORCE);
1488 if (flags & SYNC_WAIT)
1489 XFS_BUF_UNASYNC(bp);
1490 else
1491 XFS_BUF_ASYNC(bp);
1492 error = xfs_bwrite(mp, bp);
1493 }
1494 if (error) {
1495 last_error = error;
1496 }
1497 }
1498
1499 /*
1500 * If this is the periodic sync, then kick some entries out of
1501 * the reference cache. This ensures that idle entries are
1502 * eventually kicked out of the cache.
1503 */
1504 if (flags & SYNC_REFCACHE) {
1505 if (flags & SYNC_WAIT)
1506 xfs_refcache_purge_mp(mp);
1507 else
1508 xfs_refcache_purge_some(mp);
1509 }
1510
1511 /*
1512 * Now check to see if the log needs a "dummy" transaction.
1513 */
1514
1515 if (!(flags & SYNC_REMOUNT) && xfs_log_need_covered(mp)) {
1516 xfs_trans_t *tp;
1517 xfs_inode_t *ip;
1518
1519 /*
1520 * Put a dummy transaction in the log to tell
1521 * recovery that all others are OK.
1522 */
1523 tp = xfs_trans_alloc(mp, XFS_TRANS_DUMMY1);
1524 if ((error = xfs_trans_reserve(tp, 0,
1525 XFS_ICHANGE_LOG_RES(mp),
1526 0, 0, 0))) {
1527 xfs_trans_cancel(tp, 0);
1528 return error;
1529 }
1530
1531 ip = mp->m_rootip;
1532 xfs_ilock(ip, XFS_ILOCK_EXCL);
1533
1534 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
1535 xfs_trans_ihold(tp, ip);
1536 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1537 error = xfs_trans_commit(tp, 0, NULL);
1538 xfs_iunlock(ip, XFS_ILOCK_EXCL);
1539 xfs_log_force(mp, (xfs_lsn_t)0, log_flags);
1540 }
1541
1542 /*
1543 * When shutting down, we need to insure that the AIL is pushed
1544 * to disk or the filesystem can appear corrupt from the PROM.
1545 */
1546 if ((flags & (SYNC_CLOSE|SYNC_WAIT)) == (SYNC_CLOSE|SYNC_WAIT)) {
1547 XFS_bflush(mp->m_ddev_targp);
1548 if (mp->m_rtdev_targp) {
1549 XFS_bflush(mp->m_rtdev_targp);
1550 }
1551 }
1552
1553 return XFS_ERROR(last_error);
1554 }
1555
1556 /*
1557 * xfs_vget - called by DMAPI and NFSD to get vnode from file handle
1558 */
1559 STATIC int
1560 xfs_vget(
1561 bhv_desc_t *bdp,
1562 vnode_t **vpp,
1563 fid_t *fidp)
1564 {
1565 xfs_mount_t *mp = XFS_BHVTOM(bdp);
1566 xfs_fid_t *xfid = (struct xfs_fid *)fidp;
1567 xfs_inode_t *ip;
1568 int error;
1569 xfs_ino_t ino;
1570 unsigned int igen;
1571
1572 /*
1573 * Invalid. Since handles can be created in user space and passed in
1574 * via gethandle(), this is not cause for a panic.
1575 */
1576 if (xfid->xfs_fid_len != sizeof(*xfid) - sizeof(xfid->xfs_fid_len))
1577 return XFS_ERROR(EINVAL);
1578
1579 ino = xfid->xfs_fid_ino;
1580 igen = xfid->xfs_fid_gen;
1581
1582 /*
1583 * NFS can sometimes send requests for ino 0. Fail them gracefully.
1584 */
1585 if (ino == 0)
1586 return XFS_ERROR(ESTALE);
1587
1588 error = xfs_iget(mp, NULL, ino, 0, XFS_ILOCK_SHARED, &ip, 0);
1589 if (error) {
1590 *vpp = NULL;
1591 return error;
1592 }
1593
1594 if (ip == NULL) {
1595 *vpp = NULL;
1596 return XFS_ERROR(EIO);
1597 }
1598
1599 if (ip->i_d.di_mode == 0 || ip->i_d.di_gen != igen) {
1600 xfs_iput_new(ip, XFS_ILOCK_SHARED);
1601 *vpp = NULL;
1602 return XFS_ERROR(ENOENT);
1603 }
1604
1605 *vpp = XFS_ITOV(ip);
1606 xfs_iunlock(ip, XFS_ILOCK_SHARED);
1607 return 0;
1608 }
1609
1610
1611 #define MNTOPT_LOGBUFS "logbufs" /* number of XFS log buffers */
1612 #define MNTOPT_LOGBSIZE "logbsize" /* size of XFS log buffers */
1613 #define MNTOPT_LOGDEV "logdev" /* log device */
1614 #define MNTOPT_RTDEV "rtdev" /* realtime I/O device */
1615 #define MNTOPT_BIOSIZE "biosize" /* log2 of preferred buffered io size */
1616 #define MNTOPT_WSYNC "wsync" /* safe-mode nfs compatible mount */
1617 #define MNTOPT_INO64 "ino64" /* force inodes into 64-bit range */
1618 #define MNTOPT_NOALIGN "noalign" /* turn off stripe alignment */
1619 #define MNTOPT_SWALLOC "swalloc" /* turn on stripe width allocation */
1620 #define MNTOPT_SUNIT "sunit" /* data volume stripe unit */
1621 #define MNTOPT_SWIDTH "swidth" /* data volume stripe width */
1622 #define MNTOPT_NOUUID "nouuid" /* ignore filesystem UUID */
1623 #define MNTOPT_MTPT "mtpt" /* filesystem mount point */
1624 #define MNTOPT_GRPID "grpid" /* group-ID from parent directory */
1625 #define MNTOPT_NOGRPID "nogrpid" /* group-ID from current process */
1626 #define MNTOPT_BSDGROUPS "bsdgroups" /* group-ID from parent directory */
1627 #define MNTOPT_SYSVGROUPS "sysvgroups" /* group-ID from current process */
1628 #define MNTOPT_ALLOCSIZE "allocsize" /* preferred allocation size */
1629 #define MNTOPT_IHASHSIZE "ihashsize" /* size of inode hash table */
1630 #define MNTOPT_NORECOVERY "norecovery" /* don't run XFS recovery */
1631 #define MNTOPT_NOLOGFLUSH "nologflush" /* don't hard flush on log writes */
1632 #define MNTOPT_OSYNCISOSYNC "osyncisosync" /* o_sync is REALLY o_sync */
1633 #define MNTOPT_64BITINODE "inode64" /* inodes can be allocated anywhere */
1634 #define MNTOPT_IKEEP "ikeep" /* do not free empty inode clusters */
1635 #define MNTOPT_NOIKEEP "noikeep" /* free empty inode clusters */
1636
1637 STATIC unsigned long
1638 suffix_strtoul(const char *cp, char **endp, unsigned int base)
1639 {
1640 int last, shift_left_factor = 0;
1641 char *value = (char *)cp;
1642
1643 last = strlen(value) - 1;
1644 if (value[last] == 'K' || value[last] == 'k') {
1645 shift_left_factor = 10;
1646 value[last] = '\0';
1647 }
1648 if (value[last] == 'M' || value[last] == 'm') {
1649 shift_left_factor = 20;
1650 value[last] = '\0';
1651 }
1652 if (value[last] == 'G' || value[last] == 'g') {
1653 shift_left_factor = 30;
1654 value[last] = '\0';
1655 }
1656
1657 return simple_strtoul(cp, endp, base) << shift_left_factor;
1658 }
1659
1660 STATIC int
1661 xfs_parseargs(
1662 struct bhv_desc *bhv,
1663 char *options,
1664 struct xfs_mount_args *args,
1665 int update)
1666 {
1667 struct vfs *vfsp = bhvtovfs(bhv);
1668 char *this_char, *value, *eov;
1669 int dsunit, dswidth, vol_dsunit, vol_dswidth;
1670 int iosize;
1671
1672 #if 0 /* XXX: off by default, until some remaining issues ironed out */
1673 args->flags |= XFSMNT_IDELETE; /* default to on */
1674 #endif
1675
1676 if (!options)
1677 return 0;
1678
1679 iosize = dsunit = dswidth = vol_dsunit = vol_dswidth = 0;
1680
1681 while ((this_char = strsep(&options, ",")) != NULL) {
1682 if (!*this_char)
1683 continue;
1684 if ((value = strchr(this_char, '=')) != NULL)
1685 *value++ = 0;
1686
1687 if (!strcmp(this_char, MNTOPT_LOGBUFS)) {
1688 if (!value || !*value) {
1689 printk("XFS: %s option requires an argument\n",
1690 this_char);
1691 return EINVAL;
1692 }
1693 args->logbufs = simple_strtoul(value, &eov, 10);
1694 } else if (!strcmp(this_char, MNTOPT_LOGBSIZE)) {
1695 if (!value || !*value) {
1696 printk("XFS: %s option requires an argument\n",
1697 this_char);
1698 return EINVAL;
1699 }
1700 args->logbufsize = suffix_strtoul(value, &eov, 10);
1701 } else if (!strcmp(this_char, MNTOPT_LOGDEV)) {
1702 if (!value || !*value) {
1703 printk("XFS: %s option requires an argument\n",
1704 this_char);
1705 return EINVAL;
1706 }
1707 strncpy(args->logname, value, MAXNAMELEN);
1708 } else if (!strcmp(this_char, MNTOPT_MTPT)) {
1709 if (!value || !*value) {
1710 printk("XFS: %s option requires an argument\n",
1711 this_char);
1712 return EINVAL;
1713 }
1714 strncpy(args->mtpt, value, MAXNAMELEN);
1715 } else if (!strcmp(this_char, MNTOPT_RTDEV)) {
1716 if (!value || !*value) {
1717 printk("XFS: %s option requires an argument\n",
1718 this_char);
1719 return EINVAL;
1720 }
1721 strncpy(args->rtname, value, MAXNAMELEN);
1722 } else if (!strcmp(this_char, MNTOPT_BIOSIZE)) {
1723 if (!value || !*value) {
1724 printk("XFS: %s option requires an argument\n",
1725 this_char);
1726 return EINVAL;
1727 }
1728 iosize = simple_strtoul(value, &eov, 10);
1729 args->flags |= XFSMNT_IOSIZE;
1730 args->iosizelog = (uint8_t) iosize;
1731 } else if (!strcmp(this_char, MNTOPT_ALLOCSIZE)) {
1732 if (!value || !*value) {
1733 printk("XFS: %s option requires an argument\n",
1734 this_char);
1735 return EINVAL;
1736 }
1737 iosize = suffix_strtoul(value, &eov, 10);
1738 args->flags |= XFSMNT_IOSIZE;
1739 args->iosizelog = ffs(iosize) - 1;
1740 } else if (!strcmp(this_char, MNTOPT_IHASHSIZE)) {
1741 if (!value || !*value) {
1742 printk("XFS: %s option requires an argument\n",
1743 this_char);
1744 return EINVAL;
1745 }
1746 args->flags |= XFSMNT_IHASHSIZE;
1747 args->ihashsize = simple_strtoul(value, &eov, 10);
1748 } else if (!strcmp(this_char, MNTOPT_GRPID) ||
1749 !strcmp(this_char, MNTOPT_BSDGROUPS)) {
1750 vfsp->vfs_flag |= VFS_GRPID;
1751 } else if (!strcmp(this_char, MNTOPT_NOGRPID) ||
1752 !strcmp(this_char, MNTOPT_SYSVGROUPS)) {
1753 vfsp->vfs_flag &= ~VFS_GRPID;
1754 } else if (!strcmp(this_char, MNTOPT_WSYNC)) {
1755 args->flags |= XFSMNT_WSYNC;
1756 } else if (!strcmp(this_char, MNTOPT_OSYNCISOSYNC)) {
1757 args->flags |= XFSMNT_OSYNCISOSYNC;
1758 } else if (!strcmp(this_char, MNTOPT_NORECOVERY)) {
1759 args->flags |= XFSMNT_NORECOVERY;
1760 } else if (!strcmp(this_char, MNTOPT_INO64)) {
1761 args->flags |= XFSMNT_INO64;
1762 #if !XFS_BIG_INUMS
1763 printk("XFS: %s option not allowed on this system\n",
1764 this_char);
1765 return EINVAL;
1766 #endif
1767 } else if (!strcmp(this_char, MNTOPT_NOALIGN)) {
1768 args->flags |= XFSMNT_NOALIGN;
1769 } else if (!strcmp(this_char, MNTOPT_SWALLOC)) {
1770 args->flags |= XFSMNT_SWALLOC;
1771 } else if (!strcmp(this_char, MNTOPT_SUNIT)) {
1772 if (!value || !*value) {
1773 printk("XFS: %s option requires an argument\n",
1774 this_char);
1775 return EINVAL;
1776 }
1777 dsunit = simple_strtoul(value, &eov, 10);
1778 } else if (!strcmp(this_char, MNTOPT_SWIDTH)) {
1779 if (!value || !*value) {
1780 printk("XFS: %s option requires an argument\n",
1781 this_char);
1782 return EINVAL;
1783 }
1784 dswidth = simple_strtoul(value, &eov, 10);
1785 } else if (!strcmp(this_char, MNTOPT_64BITINODE)) {
1786 args->flags &= ~XFSMNT_32BITINODES;
1787 #if !XFS_BIG_INUMS
1788 printk("XFS: %s option not allowed on this system\n",
1789 this_char);
1790 return EINVAL;
1791 #endif
1792 } else if (!strcmp(this_char, MNTOPT_NOUUID)) {
1793 args->flags |= XFSMNT_NOUUID;
1794 } else if (!strcmp(this_char, MNTOPT_NOLOGFLUSH)) {
1795 args->flags |= XFSMNT_NOLOGFLUSH;
1796 } else if (!strcmp(this_char, MNTOPT_IKEEP)) {
1797 args->flags &= ~XFSMNT_IDELETE;
1798 } else if (!strcmp(this_char, MNTOPT_NOIKEEP)) {
1799 args->flags |= XFSMNT_IDELETE;
1800 } else if (!strcmp(this_char, "osyncisdsync")) {
1801 /* no-op, this is now the default */
1802 printk("XFS: osyncisdsync is now the default, option is deprecated.\n");
1803 } else if (!strcmp(this_char, "irixsgid")) {
1804 printk("XFS: irixsgid is now a sysctl(2) variable, option is deprecated.\n");
1805 } else {
1806 printk("XFS: unknown mount option [%s].\n", this_char);
1807 return EINVAL;
1808 }
1809 }
1810
1811 if (args->flags & XFSMNT_NORECOVERY) {
1812 if ((vfsp->vfs_flag & VFS_RDONLY) == 0) {
1813 printk("XFS: no-recovery mounts must be read-only.\n");
1814 return EINVAL;
1815 }
1816 }
1817
1818 if ((args->flags & XFSMNT_NOALIGN) && (dsunit || dswidth)) {
1819 printk(
1820 "XFS: sunit and swidth options incompatible with the noalign option\n");
1821 return EINVAL;
1822 }
1823
1824 if ((dsunit && !dswidth) || (!dsunit && dswidth)) {
1825 printk("XFS: sunit and swidth must be specified together\n");
1826 return EINVAL;
1827 }
1828
1829 if (dsunit && (dswidth % dsunit != 0)) {
1830 printk(
1831 "XFS: stripe width (%d) must be a multiple of the stripe unit (%d)\n",
1832 dswidth, dsunit);
1833 return EINVAL;
1834 }
1835
1836 if ((args->flags & XFSMNT_NOALIGN) != XFSMNT_NOALIGN) {
1837 if (dsunit) {
1838 args->sunit = dsunit;
1839 args->flags |= XFSMNT_RETERR;
1840 } else {
1841 args->sunit = vol_dsunit;
1842 }
1843 dswidth ? (args->swidth = dswidth) :
1844 (args->swidth = vol_dswidth);
1845 } else {
1846 args->sunit = args->swidth = 0;
1847 }
1848
1849 return 0;
1850 }
1851
1852 STATIC int
1853 xfs_showargs(
1854 struct bhv_desc *bhv,
1855 struct seq_file *m)
1856 {
1857 static struct proc_xfs_info {
1858 int flag;
1859 char *str;
1860 } xfs_info[] = {
1861 /* the few simple ones we can get from the mount struct */
1862 { XFS_MOUNT_WSYNC, "," MNTOPT_WSYNC },
1863 { XFS_MOUNT_INO64, "," MNTOPT_INO64 },
1864 { XFS_MOUNT_NOALIGN, "," MNTOPT_NOALIGN },
1865 { XFS_MOUNT_SWALLOC, "," MNTOPT_SWALLOC },
1866 { XFS_MOUNT_NOUUID, "," MNTOPT_NOUUID },
1867 { XFS_MOUNT_NORECOVERY, "," MNTOPT_NORECOVERY },
1868 { XFS_MOUNT_OSYNCISOSYNC, "," MNTOPT_OSYNCISOSYNC },
1869 { XFS_MOUNT_NOLOGFLUSH, "," MNTOPT_NOLOGFLUSH },
1870 { XFS_MOUNT_IDELETE, "," MNTOPT_NOIKEEP },
1871 { 0, NULL }
1872 };
1873 struct proc_xfs_info *xfs_infop;
1874 struct xfs_mount *mp = XFS_BHVTOM(bhv);
1875 struct vfs *vfsp = XFS_MTOVFS(mp);
1876
1877 for (xfs_infop = xfs_info; xfs_infop->flag; xfs_infop++) {
1878 if (mp->m_flags & xfs_infop->flag)
1879 seq_puts(m, xfs_infop->str);
1880 }
1881
1882 if (mp->m_flags & XFS_MOUNT_IHASHSIZE)
1883 seq_printf(m, "," MNTOPT_IHASHSIZE "=%d", mp->m_ihsize);
1884
1885 if (mp->m_flags & XFS_MOUNT_DFLT_IOSIZE)
1886 seq_printf(m, "," MNTOPT_ALLOCSIZE "=%d", 1<<mp->m_writeio_log);
1887
1888 if (mp->m_logbufs > 0)
1889 seq_printf(m, "," MNTOPT_LOGBUFS "=%d", mp->m_logbufs);
1890
1891 if (mp->m_logbsize > 0)
1892 seq_printf(m, "," MNTOPT_LOGBSIZE "=%d", mp->m_logbsize);
1893
1894 if (mp->m_ddev_targp != mp->m_logdev_targp)
1895 seq_printf(m, "," MNTOPT_LOGDEV "=%s",
1896 XFS_BUFTARG_NAME(mp->m_logdev_targp));
1897
1898 if (mp->m_rtdev_targp && mp->m_ddev_targp != mp->m_rtdev_targp)
1899 seq_printf(m, "," MNTOPT_RTDEV "=%s",
1900 XFS_BUFTARG_NAME(mp->m_rtdev_targp));
1901
1902 if (mp->m_dalign > 0)
1903 seq_printf(m, "," MNTOPT_SUNIT "=%d",
1904 (int)XFS_FSB_TO_BB(mp, mp->m_dalign));
1905
1906 if (mp->m_swidth > 0)
1907 seq_printf(m, "," MNTOPT_SWIDTH "=%d",
1908 (int)XFS_FSB_TO_BB(mp, mp->m_swidth));
1909
1910 if (!(mp->m_flags & XFS_MOUNT_32BITINOOPT))
1911 seq_printf(m, "," MNTOPT_64BITINODE);
1912
1913 if (vfsp->vfs_flag & VFS_GRPID)
1914 seq_printf(m, "," MNTOPT_GRPID);
1915
1916 return 0;
1917 }
1918
1919 STATIC void
1920 xfs_freeze(
1921 bhv_desc_t *bdp)
1922 {
1923 xfs_mount_t *mp = XFS_BHVTOM(bdp);
1924
1925 while (atomic_read(&mp->m_active_trans) > 0)
1926 delay(100);
1927
1928 /* Push the superblock and write an unmount record */
1929 xfs_log_unmount_write(mp);
1930 xfs_unmountfs_writesb(mp);
1931 }
1932
1933
1934 vfsops_t xfs_vfsops = {
1935 BHV_IDENTITY_INIT(VFS_BHV_XFS,VFS_POSITION_XFS),
1936 .vfs_parseargs = xfs_parseargs,
1937 .vfs_showargs = xfs_showargs,
1938 .vfs_mount = xfs_mount,
1939 .vfs_unmount = xfs_unmount,
1940 .vfs_mntupdate = xfs_mntupdate,
1941 .vfs_root = xfs_root,
1942 .vfs_statvfs = xfs_statvfs,
1943 .vfs_sync = xfs_sync,
1944 .vfs_vget = xfs_vget,
1945 .vfs_dmapiops = (vfs_dmapiops_t)fs_nosys,
1946 .vfs_quotactl = (vfs_quotactl_t)fs_nosys,
1947 .vfs_init_vnode = xfs_initialize_vnode,
1948 .vfs_force_shutdown = xfs_do_force_shutdown,
1949 .vfs_freeze = xfs_freeze,
1950 };
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