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Linux 2.6.13-rc4
[linux-2.6/next.git] / fs / xfs / xfs_vfsops.c
blob42bcc0215203b16f19e71c844a395a2b3398fb72
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 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 = XFS_BHVTOM(bdp);
881
882 if (unlikely(flags == SYNC_QUIESCE))
883 return xfs_quiesce_fs(mp);
884 else
885 return xfs_syncsub(mp, flags, 0, NULL);
886 }
887
888 /*
889 * xfs sync routine for internal use
890 *
891 * This routine supports all of the flags defined for the generic VFS_SYNC
892 * interface as explained above under xfs_sync. In the interests of not
893 * changing interfaces within the 6.5 family, additional internallly-
894 * required functions are specified within a separate xflags parameter,
895 * only available by calling this routine.
896 *
897 */
898 STATIC int
899 xfs_sync_inodes(
900 xfs_mount_t *mp,
901 int flags,
902 int xflags,
903 int *bypassed)
904 {
905 xfs_inode_t *ip = NULL;
906 xfs_inode_t *ip_next;
907 xfs_buf_t *bp;
908 vnode_t *vp = NULL;
909 vmap_t vmap;
910 int error;
911 int last_error;
912 uint64_t fflag;
913 uint lock_flags;
914 uint base_lock_flags;
915 boolean_t mount_locked;
916 boolean_t vnode_refed;
917 int preempt;
918 xfs_dinode_t *dip;
919 xfs_iptr_t *ipointer;
920 #ifdef DEBUG
921 boolean_t ipointer_in = B_FALSE;
922
923 #define IPOINTER_SET ipointer_in = B_TRUE
924 #define IPOINTER_CLR ipointer_in = B_FALSE
925 #else
926 #define IPOINTER_SET
927 #define IPOINTER_CLR
928 #endif
929
930
931 /* Insert a marker record into the inode list after inode ip. The list
932 * must be locked when this is called. After the call the list will no
933 * longer be locked.
934 */
935 #define IPOINTER_INSERT(ip, mp) { \
936 ASSERT(ipointer_in == B_FALSE); \
937 ipointer->ip_mnext = ip->i_mnext; \
938 ipointer->ip_mprev = ip; \
939 ip->i_mnext = (xfs_inode_t *)ipointer; \
940 ipointer->ip_mnext->i_mprev = (xfs_inode_t *)ipointer; \
941 preempt = 0; \
942 XFS_MOUNT_IUNLOCK(mp); \
943 mount_locked = B_FALSE; \
944 IPOINTER_SET; \
945 }
946
947 /* Remove the marker from the inode list. If the marker was the only item
948 * in the list then there are no remaining inodes and we should zero out
949 * the whole list. If we are the current head of the list then move the head
950 * past us.
951 */
952 #define IPOINTER_REMOVE(ip, mp) { \
953 ASSERT(ipointer_in == B_TRUE); \
954 if (ipointer->ip_mnext != (xfs_inode_t *)ipointer) { \
955 ip = ipointer->ip_mnext; \
956 ip->i_mprev = ipointer->ip_mprev; \
957 ipointer->ip_mprev->i_mnext = ip; \
958 if (mp->m_inodes == (xfs_inode_t *)ipointer) { \
959 mp->m_inodes = ip; \
960 } \
961 } else { \
962 ASSERT(mp->m_inodes == (xfs_inode_t *)ipointer); \
963 mp->m_inodes = NULL; \
964 ip = NULL; \
965 } \
966 IPOINTER_CLR; \
967 }
968
969 #define XFS_PREEMPT_MASK 0x7f
970
971 if (bypassed)
972 *bypassed = 0;
973 if (XFS_MTOVFS(mp)->vfs_flag & VFS_RDONLY)
974 return 0;
975 error = 0;
976 last_error = 0;
977 preempt = 0;
978
979 /* Allocate a reference marker */
980 ipointer = (xfs_iptr_t *)kmem_zalloc(sizeof(xfs_iptr_t), KM_SLEEP);
981
982 fflag = XFS_B_ASYNC; /* default is don't wait */
983 if (flags & SYNC_BDFLUSH)
984 fflag = XFS_B_DELWRI;
985 if (flags & SYNC_WAIT)
986 fflag = 0; /* synchronous overrides all */
987
988 base_lock_flags = XFS_ILOCK_SHARED;
989 if (flags & (SYNC_DELWRI | SYNC_CLOSE)) {
990 /*
991 * We need the I/O lock if we're going to call any of
992 * the flush/inval routines.
993 */
994 base_lock_flags |= XFS_IOLOCK_SHARED;
995 }
996
997 XFS_MOUNT_ILOCK(mp);
998
999 ip = mp->m_inodes;
1000
1001 mount_locked = B_TRUE;
1002 vnode_refed = B_FALSE;
1003
1004 IPOINTER_CLR;
1005
1006 do {
1007 ASSERT(ipointer_in == B_FALSE);
1008 ASSERT(vnode_refed == B_FALSE);
1009
1010 lock_flags = base_lock_flags;
1011
1012 /*
1013 * There were no inodes in the list, just break out
1014 * of the loop.
1015 */
1016 if (ip == NULL) {
1017 break;
1018 }
1019
1020 /*
1021 * We found another sync thread marker - skip it
1022 */
1023 if (ip->i_mount == NULL) {
1024 ip = ip->i_mnext;
1025 continue;
1026 }
1027
1028 vp = XFS_ITOV_NULL(ip);
1029
1030 /*
1031 * If the vnode is gone then this is being torn down,
1032 * call reclaim if it is flushed, else let regular flush
1033 * code deal with it later in the loop.
1034 */
1035
1036 if (vp == NULL) {
1037 /* Skip ones already in reclaim */
1038 if (ip->i_flags & XFS_IRECLAIM) {
1039 ip = ip->i_mnext;
1040 continue;
1041 }
1042 if (xfs_ilock_nowait(ip, XFS_ILOCK_EXCL) == 0) {
1043 ip = ip->i_mnext;
1044 } else if ((xfs_ipincount(ip) == 0) &&
1045 xfs_iflock_nowait(ip)) {
1046 IPOINTER_INSERT(ip, mp);
1047
1048 xfs_finish_reclaim(ip, 1,
1049 XFS_IFLUSH_DELWRI_ELSE_ASYNC);
1050
1051 XFS_MOUNT_ILOCK(mp);
1052 mount_locked = B_TRUE;
1053 IPOINTER_REMOVE(ip, mp);
1054 } else {
1055 xfs_iunlock(ip, XFS_ILOCK_EXCL);
1056 ip = ip->i_mnext;
1057 }
1058 continue;
1059 }
1060
1061 if (VN_BAD(vp)) {
1062 ip = ip->i_mnext;
1063 continue;
1064 }
1065
1066 if (XFS_FORCED_SHUTDOWN(mp) && !(flags & SYNC_CLOSE)) {
1067 XFS_MOUNT_IUNLOCK(mp);
1068 kmem_free(ipointer, sizeof(xfs_iptr_t));
1069 return 0;
1070 }
1071
1072 /*
1073 * If this is just vfs_sync() or pflushd() calling
1074 * then we can skip inodes for which it looks like
1075 * there is nothing to do. Since we don't have the
1076 * inode locked this is racey, but these are periodic
1077 * calls so it doesn't matter. For the others we want
1078 * to know for sure, so we at least try to lock them.
1079 */
1080 if (flags & SYNC_BDFLUSH) {
1081 if (((ip->i_itemp == NULL) ||
1082 !(ip->i_itemp->ili_format.ilf_fields &
1083 XFS_ILOG_ALL)) &&
1084 (ip->i_update_core == 0)) {
1085 ip = ip->i_mnext;
1086 continue;
1087 }
1088 }
1089
1090 /*
1091 * Try to lock without sleeping. We're out of order with
1092 * the inode list lock here, so if we fail we need to drop
1093 * the mount lock and try again. If we're called from
1094 * bdflush() here, then don't bother.
1095 *
1096 * The inode lock here actually coordinates with the
1097 * almost spurious inode lock in xfs_ireclaim() to prevent
1098 * the vnode we handle here without a reference from
1099 * being freed while we reference it. If we lock the inode
1100 * while it's on the mount list here, then the spurious inode
1101 * lock in xfs_ireclaim() after the inode is pulled from
1102 * the mount list will sleep until we release it here.
1103 * This keeps the vnode from being freed while we reference
1104 * it. It is also cheaper and simpler than actually doing
1105 * a vn_get() for every inode we touch here.
1106 */
1107 if (xfs_ilock_nowait(ip, lock_flags) == 0) {
1108
1109 if ((flags & SYNC_BDFLUSH) || (vp == NULL)) {
1110 ip = ip->i_mnext;
1111 continue;
1112 }
1113
1114 /*
1115 * We need to unlock the inode list lock in order
1116 * to lock the inode. Insert a marker record into
1117 * the inode list to remember our position, dropping
1118 * the lock is now done inside the IPOINTER_INSERT
1119 * macro.
1120 *
1121 * We also use the inode list lock to protect us
1122 * in taking a snapshot of the vnode version number
1123 * for use in calling vn_get().
1124 */
1125 VMAP(vp, vmap);
1126 IPOINTER_INSERT(ip, mp);
1127
1128 vp = vn_get(vp, &vmap);
1129 if (vp == NULL) {
1130 /*
1131 * The vnode was reclaimed once we let go
1132 * of the inode list lock. Skip to the
1133 * next list entry. Remove the marker.
1134 */
1135
1136 XFS_MOUNT_ILOCK(mp);
1137
1138 mount_locked = B_TRUE;
1139 vnode_refed = B_FALSE;
1140
1141 IPOINTER_REMOVE(ip, mp);
1142
1143 continue;
1144 }
1145
1146 xfs_ilock(ip, lock_flags);
1147
1148 ASSERT(vp == XFS_ITOV(ip));
1149 ASSERT(ip->i_mount == mp);
1150
1151 vnode_refed = B_TRUE;
1152 }
1153
1154 /* From here on in the loop we may have a marker record
1155 * in the inode list.
1156 */
1157
1158 if ((flags & SYNC_CLOSE) && (vp != NULL)) {
1159 /*
1160 * This is the shutdown case. We just need to
1161 * flush and invalidate all the pages associated
1162 * with the inode. Drop the inode lock since
1163 * we can't hold it across calls to the buffer
1164 * cache.
1165 *
1166 * We don't set the VREMAPPING bit in the vnode
1167 * here, because we don't hold the vnode lock
1168 * exclusively. It doesn't really matter, though,
1169 * because we only come here when we're shutting
1170 * down anyway.
1171 */
1172 xfs_iunlock(ip, XFS_ILOCK_SHARED);
1173
1174 if (XFS_FORCED_SHUTDOWN(mp)) {
1175 VOP_TOSS_PAGES(vp, 0, -1, FI_REMAPF);
1176 } else {
1177 VOP_FLUSHINVAL_PAGES(vp, 0, -1, FI_REMAPF);
1178 }
1179
1180 xfs_ilock(ip, XFS_ILOCK_SHARED);
1181
1182 } else if ((flags & SYNC_DELWRI) && (vp != NULL)) {
1183 if (VN_DIRTY(vp)) {
1184 /* We need to have dropped the lock here,
1185 * so insert a marker if we have not already
1186 * done so.
1187 */
1188 if (mount_locked) {
1189 IPOINTER_INSERT(ip, mp);
1190 }
1191
1192 /*
1193 * Drop the inode lock since we can't hold it
1194 * across calls to the buffer cache.
1195 */
1196 xfs_iunlock(ip, XFS_ILOCK_SHARED);
1197 VOP_FLUSH_PAGES(vp, (xfs_off_t)0, -1,
1198 fflag, FI_NONE, error);
1199 xfs_ilock(ip, XFS_ILOCK_SHARED);
1200 }
1201
1202 }
1203
1204 if (flags & SYNC_BDFLUSH) {
1205 if ((flags & SYNC_ATTR) &&
1206 ((ip->i_update_core) ||
1207 ((ip->i_itemp != NULL) &&
1208 (ip->i_itemp->ili_format.ilf_fields != 0)))) {
1209
1210 /* Insert marker and drop lock if not already
1211 * done.
1212 */
1213 if (mount_locked) {
1214 IPOINTER_INSERT(ip, mp);
1215 }
1216
1217 /*
1218 * We don't want the periodic flushing of the
1219 * inodes by vfs_sync() to interfere with
1220 * I/O to the file, especially read I/O
1221 * where it is only the access time stamp
1222 * that is being flushed out. To prevent
1223 * long periods where we have both inode
1224 * locks held shared here while reading the
1225 * inode's buffer in from disk, we drop the
1226 * inode lock while reading in the inode
1227 * buffer. We have to release the buffer
1228 * and reacquire the inode lock so that they
1229 * are acquired in the proper order (inode
1230 * locks first). The buffer will go at the
1231 * end of the lru chain, though, so we can
1232 * expect it to still be there when we go
1233 * for it again in xfs_iflush().
1234 */
1235 if ((xfs_ipincount(ip) == 0) &&
1236 xfs_iflock_nowait(ip)) {
1237
1238 xfs_ifunlock(ip);
1239 xfs_iunlock(ip, XFS_ILOCK_SHARED);
1240
1241 error = xfs_itobp(mp, NULL, ip,
1242 &dip, &bp, 0);
1243 if (!error) {
1244 xfs_buf_relse(bp);
1245 } else {
1246 /* Bailing out, remove the
1247 * marker and free it.
1248 */
1249 XFS_MOUNT_ILOCK(mp);
1250
1251 IPOINTER_REMOVE(ip, mp);
1252
1253 XFS_MOUNT_IUNLOCK(mp);
1254
1255 ASSERT(!(lock_flags &
1256 XFS_IOLOCK_SHARED));
1257
1258 kmem_free(ipointer,
1259 sizeof(xfs_iptr_t));
1260 return (0);
1261 }
1262
1263 /*
1264 * Since we dropped the inode lock,
1265 * the inode may have been reclaimed.
1266 * Therefore, we reacquire the mount
1267 * lock and check to see if we were the
1268 * inode reclaimed. If this happened
1269 * then the ipointer marker will no
1270 * longer point back at us. In this
1271 * case, move ip along to the inode
1272 * after the marker, remove the marker
1273 * and continue.
1274 */
1275 XFS_MOUNT_ILOCK(mp);
1276 mount_locked = B_TRUE;
1277
1278 if (ip != ipointer->ip_mprev) {
1279 IPOINTER_REMOVE(ip, mp);
1280
1281 ASSERT(!vnode_refed);
1282 ASSERT(!(lock_flags &
1283 XFS_IOLOCK_SHARED));
1284 continue;
1285 }
1286
1287 ASSERT(ip->i_mount == mp);
1288
1289 if (xfs_ilock_nowait(ip,
1290 XFS_ILOCK_SHARED) == 0) {
1291 ASSERT(ip->i_mount == mp);
1292 /*
1293 * We failed to reacquire
1294 * the inode lock without
1295 * sleeping, so just skip
1296 * the inode for now. We
1297 * clear the ILOCK bit from
1298 * the lock_flags so that we
1299 * won't try to drop a lock
1300 * we don't hold below.
1301 */
1302 lock_flags &= ~XFS_ILOCK_SHARED;
1303 IPOINTER_REMOVE(ip_next, mp);
1304 } else if ((xfs_ipincount(ip) == 0) &&
1305 xfs_iflock_nowait(ip)) {
1306 ASSERT(ip->i_mount == mp);
1307 /*
1308 * Since this is vfs_sync()
1309 * calling we only flush the
1310 * inode out if we can lock
1311 * it without sleeping and
1312 * it is not pinned. Drop
1313 * the mount lock here so
1314 * that we don't hold it for
1315 * too long. We already have
1316 * a marker in the list here.
1317 */
1318 XFS_MOUNT_IUNLOCK(mp);
1319 mount_locked = B_FALSE;
1320 error = xfs_iflush(ip,
1321 XFS_IFLUSH_DELWRI);
1322 } else {
1323 ASSERT(ip->i_mount == mp);
1324 IPOINTER_REMOVE(ip_next, mp);
1325 }
1326 }
1327
1328 }
1329
1330 } else {
1331 if ((flags & SYNC_ATTR) &&
1332 ((ip->i_update_core) ||
1333 ((ip->i_itemp != NULL) &&
1334 (ip->i_itemp->ili_format.ilf_fields != 0)))) {
1335 if (mount_locked) {
1336 IPOINTER_INSERT(ip, mp);
1337 }
1338
1339 if (flags & SYNC_WAIT) {
1340 xfs_iflock(ip);
1341 error = xfs_iflush(ip,
1342 XFS_IFLUSH_SYNC);
1343 } else {
1344 /*
1345 * If we can't acquire the flush
1346 * lock, then the inode is already
1347 * being flushed so don't bother
1348 * waiting. If we can lock it then
1349 * do a delwri flush so we can
1350 * combine multiple inode flushes
1351 * in each disk write.
1352 */
1353 if (xfs_iflock_nowait(ip)) {
1354 error = xfs_iflush(ip,
1355 XFS_IFLUSH_DELWRI);
1356 }
1357 else if (bypassed)
1358 (*bypassed)++;
1359 }
1360 }
1361 }
1362
1363 if (lock_flags != 0) {
1364 xfs_iunlock(ip, lock_flags);
1365 }
1366
1367 if (vnode_refed) {
1368 /*
1369 * If we had to take a reference on the vnode
1370 * above, then wait until after we've unlocked
1371 * the inode to release the reference. This is
1372 * because we can be already holding the inode
1373 * lock when VN_RELE() calls xfs_inactive().
1374 *
1375 * Make sure to drop the mount lock before calling
1376 * VN_RELE() so that we don't trip over ourselves if
1377 * we have to go for the mount lock again in the
1378 * inactive code.
1379 */
1380 if (mount_locked) {
1381 IPOINTER_INSERT(ip, mp);
1382 }
1383
1384 VN_RELE(vp);
1385
1386 vnode_refed = B_FALSE;
1387 }
1388
1389 if (error) {
1390 last_error = error;
1391 }
1392
1393 /*
1394 * bail out if the filesystem is corrupted.
1395 */
1396 if (error == EFSCORRUPTED) {
1397 if (!mount_locked) {
1398 XFS_MOUNT_ILOCK(mp);
1399 IPOINTER_REMOVE(ip, mp);
1400 }
1401 XFS_MOUNT_IUNLOCK(mp);
1402 ASSERT(ipointer_in == B_FALSE);
1403 kmem_free(ipointer, sizeof(xfs_iptr_t));
1404 return XFS_ERROR(error);
1405 }
1406
1407 /* Let other threads have a chance at the mount lock
1408 * if we have looped many times without dropping the
1409 * lock.
1410 */
1411 if ((++preempt & XFS_PREEMPT_MASK) == 0) {
1412 if (mount_locked) {
1413 IPOINTER_INSERT(ip, mp);
1414 }
1415 }
1416
1417 if (mount_locked == B_FALSE) {
1418 XFS_MOUNT_ILOCK(mp);
1419 mount_locked = B_TRUE;
1420 IPOINTER_REMOVE(ip, mp);
1421 continue;
1422 }
1423
1424 ASSERT(ipointer_in == B_FALSE);
1425 ip = ip->i_mnext;
1426
1427 } while (ip != mp->m_inodes);
1428
1429 XFS_MOUNT_IUNLOCK(mp);
1430
1431 ASSERT(ipointer_in == B_FALSE);
1432
1433 kmem_free(ipointer, sizeof(xfs_iptr_t));
1434 return XFS_ERROR(last_error);
1435 }
1436
1437 /*
1438 * xfs sync routine for internal use
1439 *
1440 * This routine supports all of the flags defined for the generic VFS_SYNC
1441 * interface as explained above under xfs_sync. In the interests of not
1442 * changing interfaces within the 6.5 family, additional internallly-
1443 * required functions are specified within a separate xflags parameter,
1444 * only available by calling this routine.
1445 *
1446 */
1447 int
1448 xfs_syncsub(
1449 xfs_mount_t *mp,
1450 int flags,
1451 int xflags,
1452 int *bypassed)
1453 {
1454 int error = 0;
1455 int last_error = 0;
1456 uint log_flags = XFS_LOG_FORCE;
1457 xfs_buf_t *bp;
1458 xfs_buf_log_item_t *bip;
1459
1460 /*
1461 * Sync out the log. This ensures that the log is periodically
1462 * flushed even if there is not enough activity to fill it up.
1463 */
1464 if (flags & SYNC_WAIT)
1465 log_flags |= XFS_LOG_SYNC;
1466
1467 xfs_log_force(mp, (xfs_lsn_t)0, log_flags);
1468
1469 if (flags & (SYNC_ATTR|SYNC_DELWRI)) {
1470 if (flags & SYNC_BDFLUSH)
1471 xfs_finish_reclaim_all(mp, 1);
1472 else
1473 error = xfs_sync_inodes(mp, flags, xflags, bypassed);
1474 }
1475
1476 /*
1477 * Flushing out dirty data above probably generated more
1478 * log activity, so if this isn't vfs_sync() then flush
1479 * the log again.
1480 */
1481 if (flags & SYNC_DELWRI) {
1482 xfs_log_force(mp, (xfs_lsn_t)0, log_flags);
1483 }
1484
1485 if (flags & SYNC_FSDATA) {
1486 /*
1487 * If this is vfs_sync() then only sync the superblock
1488 * if we can lock it without sleeping and it is not pinned.
1489 */
1490 if (flags & SYNC_BDFLUSH) {
1491 bp = xfs_getsb(mp, XFS_BUF_TRYLOCK);
1492 if (bp != NULL) {
1493 bip = XFS_BUF_FSPRIVATE(bp,xfs_buf_log_item_t*);
1494 if ((bip != NULL) &&
1495 xfs_buf_item_dirty(bip)) {
1496 if (!(XFS_BUF_ISPINNED(bp))) {
1497 XFS_BUF_ASYNC(bp);
1498 error = xfs_bwrite(mp, bp);
1499 } else {
1500 xfs_buf_relse(bp);
1501 }
1502 } else {
1503 xfs_buf_relse(bp);
1504 }
1505 }
1506 } else {
1507 bp = xfs_getsb(mp, 0);
1508 /*
1509 * If the buffer is pinned then push on the log so
1510 * we won't get stuck waiting in the write for
1511 * someone, maybe ourselves, to flush the log.
1512 * Even though we just pushed the log above, we
1513 * did not have the superblock buffer locked at
1514 * that point so it can become pinned in between
1515 * there and here.
1516 */
1517 if (XFS_BUF_ISPINNED(bp))
1518 xfs_log_force(mp, (xfs_lsn_t)0, XFS_LOG_FORCE);
1519 if (flags & SYNC_WAIT)
1520 XFS_BUF_UNASYNC(bp);
1521 else
1522 XFS_BUF_ASYNC(bp);
1523 error = xfs_bwrite(mp, bp);
1524 }
1525 if (error) {
1526 last_error = error;
1527 }
1528 }
1529
1530 /*
1531 * If this is the periodic sync, then kick some entries out of
1532 * the reference cache. This ensures that idle entries are
1533 * eventually kicked out of the cache.
1534 */
1535 if (flags & SYNC_REFCACHE) {
1536 xfs_refcache_purge_some(mp);
1537 }
1538
1539 /*
1540 * Now check to see if the log needs a "dummy" transaction.
1541 */
1542
1543 if (!(flags & SYNC_REMOUNT) && xfs_log_need_covered(mp)) {
1544 xfs_trans_t *tp;
1545 xfs_inode_t *ip;
1546
1547 /*
1548 * Put a dummy transaction in the log to tell
1549 * recovery that all others are OK.
1550 */
1551 tp = xfs_trans_alloc(mp, XFS_TRANS_DUMMY1);
1552 if ((error = xfs_trans_reserve(tp, 0,
1553 XFS_ICHANGE_LOG_RES(mp),
1554 0, 0, 0))) {
1555 xfs_trans_cancel(tp, 0);
1556 return error;
1557 }
1558
1559 ip = mp->m_rootip;
1560 xfs_ilock(ip, XFS_ILOCK_EXCL);
1561
1562 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
1563 xfs_trans_ihold(tp, ip);
1564 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1565 error = xfs_trans_commit(tp, 0, NULL);
1566 xfs_iunlock(ip, XFS_ILOCK_EXCL);
1567 xfs_log_force(mp, (xfs_lsn_t)0, log_flags);
1568 }
1569
1570 /*
1571 * When shutting down, we need to insure that the AIL is pushed
1572 * to disk or the filesystem can appear corrupt from the PROM.
1573 */
1574 if ((flags & (SYNC_CLOSE|SYNC_WAIT)) == (SYNC_CLOSE|SYNC_WAIT)) {
1575 XFS_bflush(mp->m_ddev_targp);
1576 if (mp->m_rtdev_targp) {
1577 XFS_bflush(mp->m_rtdev_targp);
1578 }
1579 }
1580
1581 return XFS_ERROR(last_error);
1582 }
1583
1584 /*
1585 * xfs_vget - called by DMAPI and NFSD to get vnode from file handle
1586 */
1587 STATIC int
1588 xfs_vget(
1589 bhv_desc_t *bdp,
1590 vnode_t **vpp,
1591 fid_t *fidp)
1592 {
1593 xfs_mount_t *mp = XFS_BHVTOM(bdp);
1594 xfs_fid_t *xfid = (struct xfs_fid *)fidp;
1595 xfs_inode_t *ip;
1596 int error;
1597 xfs_ino_t ino;
1598 unsigned int igen;
1599
1600 /*
1601 * Invalid. Since handles can be created in user space and passed in
1602 * via gethandle(), this is not cause for a panic.
1603 */
1604 if (xfid->xfs_fid_len != sizeof(*xfid) - sizeof(xfid->xfs_fid_len))
1605 return XFS_ERROR(EINVAL);
1606
1607 ino = xfid->xfs_fid_ino;
1608 igen = xfid->xfs_fid_gen;
1609
1610 /*
1611 * NFS can sometimes send requests for ino 0. Fail them gracefully.
1612 */
1613 if (ino == 0)
1614 return XFS_ERROR(ESTALE);
1615
1616 error = xfs_iget(mp, NULL, ino, 0, XFS_ILOCK_SHARED, &ip, 0);
1617 if (error) {
1618 *vpp = NULL;
1619 return error;
1620 }
1621
1622 if (ip == NULL) {
1623 *vpp = NULL;
1624 return XFS_ERROR(EIO);
1625 }
1626
1627 if (ip->i_d.di_mode == 0 || ip->i_d.di_gen != igen) {
1628 xfs_iput_new(ip, XFS_ILOCK_SHARED);
1629 *vpp = NULL;
1630 return XFS_ERROR(ENOENT);
1631 }
1632
1633 *vpp = XFS_ITOV(ip);
1634 xfs_iunlock(ip, XFS_ILOCK_SHARED);
1635 return 0;
1636 }
1637
1638
1639 #define MNTOPT_LOGBUFS "logbufs" /* number of XFS log buffers */
1640 #define MNTOPT_LOGBSIZE "logbsize" /* size of XFS log buffers */
1641 #define MNTOPT_LOGDEV "logdev" /* log device */
1642 #define MNTOPT_RTDEV "rtdev" /* realtime I/O device */
1643 #define MNTOPT_BIOSIZE "biosize" /* log2 of preferred buffered io size */
1644 #define MNTOPT_WSYNC "wsync" /* safe-mode nfs compatible mount */
1645 #define MNTOPT_INO64 "ino64" /* force inodes into 64-bit range */
1646 #define MNTOPT_NOALIGN "noalign" /* turn off stripe alignment */
1647 #define MNTOPT_SWALLOC "swalloc" /* turn on stripe width allocation */
1648 #define MNTOPT_SUNIT "sunit" /* data volume stripe unit */
1649 #define MNTOPT_SWIDTH "swidth" /* data volume stripe width */
1650 #define MNTOPT_NOUUID "nouuid" /* ignore filesystem UUID */
1651 #define MNTOPT_MTPT "mtpt" /* filesystem mount point */
1652 #define MNTOPT_ALLOCSIZE "allocsize" /* preferred allocation size */
1653 #define MNTOPT_IHASHSIZE "ihashsize" /* size of inode hash table */
1654 #define MNTOPT_NORECOVERY "norecovery" /* don't run XFS recovery */
1655 #define MNTOPT_NOLOGFLUSH "nologflush" /* don't hard flush on log writes */
1656 #define MNTOPT_OSYNCISOSYNC "osyncisosync" /* o_sync is REALLY o_sync */
1657 #define MNTOPT_64BITINODE "inode64" /* inodes can be allocated anywhere */
1658 #define MNTOPT_IKEEP "ikeep" /* do not free empty inode clusters */
1659 #define MNTOPT_NOIKEEP "noikeep" /* free empty inode clusters */
1660
1661 STATIC unsigned long
1662 suffix_strtoul(const char *cp, char **endp, unsigned int base)
1663 {
1664 int last, shift_left_factor = 0;
1665 char *value = (char *)cp;
1666
1667 last = strlen(value) - 1;
1668 if (value[last] == 'K' || value[last] == 'k') {
1669 shift_left_factor = 10;
1670 value[last] = '\0';
1671 }
1672 if (value[last] == 'M' || value[last] == 'm') {
1673 shift_left_factor = 20;
1674 value[last] = '\0';
1675 }
1676 if (value[last] == 'G' || value[last] == 'g') {
1677 shift_left_factor = 30;
1678 value[last] = '\0';
1679 }
1680
1681 return simple_strtoul(cp, endp, base) << shift_left_factor;
1682 }
1683
1684 STATIC int
1685 xfs_parseargs(
1686 struct bhv_desc *bhv,
1687 char *options,
1688 struct xfs_mount_args *args,
1689 int update)
1690 {
1691 struct vfs *vfsp = bhvtovfs(bhv);
1692 char *this_char, *value, *eov;
1693 int dsunit, dswidth, vol_dsunit, vol_dswidth;
1694 int iosize;
1695
1696 #if 0 /* XXX: off by default, until some remaining issues ironed out */
1697 args->flags |= XFSMNT_IDELETE; /* default to on */
1698 #endif
1699
1700 if (!options)
1701 return 0;
1702
1703 iosize = dsunit = dswidth = vol_dsunit = vol_dswidth = 0;
1704
1705 while ((this_char = strsep(&options, ",")) != NULL) {
1706 if (!*this_char)
1707 continue;
1708 if ((value = strchr(this_char, '=')) != NULL)
1709 *value++ = 0;
1710
1711 if (!strcmp(this_char, MNTOPT_LOGBUFS)) {
1712 if (!value || !*value) {
1713 printk("XFS: %s option requires an argument\n",
1714 this_char);
1715 return EINVAL;
1716 }
1717 args->logbufs = simple_strtoul(value, &eov, 10);
1718 } else if (!strcmp(this_char, MNTOPT_LOGBSIZE)) {
1719 if (!value || !*value) {
1720 printk("XFS: %s option requires an argument\n",
1721 this_char);
1722 return EINVAL;
1723 }
1724 args->logbufsize = suffix_strtoul(value, &eov, 10);
1725 } else if (!strcmp(this_char, MNTOPT_LOGDEV)) {
1726 if (!value || !*value) {
1727 printk("XFS: %s option requires an argument\n",
1728 this_char);
1729 return EINVAL;
1730 }
1731 strncpy(args->logname, value, MAXNAMELEN);
1732 } else if (!strcmp(this_char, MNTOPT_MTPT)) {
1733 if (!value || !*value) {
1734 printk("XFS: %s option requires an argument\n",
1735 this_char);
1736 return EINVAL;
1737 }
1738 strncpy(args->mtpt, value, MAXNAMELEN);
1739 } else if (!strcmp(this_char, MNTOPT_RTDEV)) {
1740 if (!value || !*value) {
1741 printk("XFS: %s option requires an argument\n",
1742 this_char);
1743 return EINVAL;
1744 }
1745 strncpy(args->rtname, value, MAXNAMELEN);
1746 } else if (!strcmp(this_char, MNTOPT_BIOSIZE)) {
1747 if (!value || !*value) {
1748 printk("XFS: %s option requires an argument\n",
1749 this_char);
1750 return EINVAL;
1751 }
1752 iosize = simple_strtoul(value, &eov, 10);
1753 args->flags |= XFSMNT_IOSIZE;
1754 args->iosizelog = (uint8_t) iosize;
1755 } else if (!strcmp(this_char, MNTOPT_ALLOCSIZE)) {
1756 if (!value || !*value) {
1757 printk("XFS: %s option requires an argument\n",
1758 this_char);
1759 return EINVAL;
1760 }
1761 iosize = suffix_strtoul(value, &eov, 10);
1762 args->flags |= XFSMNT_IOSIZE;
1763 args->iosizelog = ffs(iosize) - 1;
1764 } else if (!strcmp(this_char, MNTOPT_IHASHSIZE)) {
1765 if (!value || !*value) {
1766 printk("XFS: %s option requires an argument\n",
1767 this_char);
1768 return EINVAL;
1769 }
1770 args->flags |= XFSMNT_IHASHSIZE;
1771 args->ihashsize = simple_strtoul(value, &eov, 10);
1772 } else if (!strcmp(this_char, MNTOPT_WSYNC)) {
1773 args->flags |= XFSMNT_WSYNC;
1774 } else if (!strcmp(this_char, MNTOPT_OSYNCISOSYNC)) {
1775 args->flags |= XFSMNT_OSYNCISOSYNC;
1776 } else if (!strcmp(this_char, MNTOPT_NORECOVERY)) {
1777 args->flags |= XFSMNT_NORECOVERY;
1778 } else if (!strcmp(this_char, MNTOPT_INO64)) {
1779 args->flags |= XFSMNT_INO64;
1780 #if !XFS_BIG_INUMS
1781 printk("XFS: %s option not allowed on this system\n",
1782 this_char);
1783 return EINVAL;
1784 #endif
1785 } else if (!strcmp(this_char, MNTOPT_NOALIGN)) {
1786 args->flags |= XFSMNT_NOALIGN;
1787 } else if (!strcmp(this_char, MNTOPT_SWALLOC)) {
1788 args->flags |= XFSMNT_SWALLOC;
1789 } else if (!strcmp(this_char, MNTOPT_SUNIT)) {
1790 if (!value || !*value) {
1791 printk("XFS: %s option requires an argument\n",
1792 this_char);
1793 return EINVAL;
1794 }
1795 dsunit = simple_strtoul(value, &eov, 10);
1796 } else if (!strcmp(this_char, MNTOPT_SWIDTH)) {
1797 if (!value || !*value) {
1798 printk("XFS: %s option requires an argument\n",
1799 this_char);
1800 return EINVAL;
1801 }
1802 dswidth = simple_strtoul(value, &eov, 10);
1803 } else if (!strcmp(this_char, MNTOPT_64BITINODE)) {
1804 args->flags &= ~XFSMNT_32BITINODES;
1805 #if !XFS_BIG_INUMS
1806 printk("XFS: %s option not allowed on this system\n",
1807 this_char);
1808 return EINVAL;
1809 #endif
1810 } else if (!strcmp(this_char, MNTOPT_NOUUID)) {
1811 args->flags |= XFSMNT_NOUUID;
1812 } else if (!strcmp(this_char, MNTOPT_NOLOGFLUSH)) {
1813 args->flags |= XFSMNT_NOLOGFLUSH;
1814 } else if (!strcmp(this_char, MNTOPT_IKEEP)) {
1815 args->flags &= ~XFSMNT_IDELETE;
1816 } else if (!strcmp(this_char, MNTOPT_NOIKEEP)) {
1817 args->flags |= XFSMNT_IDELETE;
1818 } else if (!strcmp(this_char, "osyncisdsync")) {
1819 /* no-op, this is now the default */
1820 printk("XFS: osyncisdsync is now the default, option is deprecated.\n");
1821 } else if (!strcmp(this_char, "irixsgid")) {
1822 printk("XFS: irixsgid is now a sysctl(2) variable, option is deprecated.\n");
1823 } else {
1824 printk("XFS: unknown mount option [%s].\n", this_char);
1825 return EINVAL;
1826 }
1827 }
1828
1829 if (args->flags & XFSMNT_NORECOVERY) {
1830 if ((vfsp->vfs_flag & VFS_RDONLY) == 0) {
1831 printk("XFS: no-recovery mounts must be read-only.\n");
1832 return EINVAL;
1833 }
1834 }
1835
1836 if ((args->flags & XFSMNT_NOALIGN) && (dsunit || dswidth)) {
1837 printk(
1838 "XFS: sunit and swidth options incompatible with the noalign option\n");
1839 return EINVAL;
1840 }
1841
1842 if ((dsunit && !dswidth) || (!dsunit && dswidth)) {
1843 printk("XFS: sunit and swidth must be specified together\n");
1844 return EINVAL;
1845 }
1846
1847 if (dsunit && (dswidth % dsunit != 0)) {
1848 printk(
1849 "XFS: stripe width (%d) must be a multiple of the stripe unit (%d)\n",
1850 dswidth, dsunit);
1851 return EINVAL;
1852 }
1853
1854 if ((args->flags & XFSMNT_NOALIGN) != XFSMNT_NOALIGN) {
1855 if (dsunit) {
1856 args->sunit = dsunit;
1857 args->flags |= XFSMNT_RETERR;
1858 } else {
1859 args->sunit = vol_dsunit;
1860 }
1861 dswidth ? (args->swidth = dswidth) :
1862 (args->swidth = vol_dswidth);
1863 } else {
1864 args->sunit = args->swidth = 0;
1865 }
1866
1867 return 0;
1868 }
1869
1870 STATIC int
1871 xfs_showargs(
1872 struct bhv_desc *bhv,
1873 struct seq_file *m)
1874 {
1875 static struct proc_xfs_info {
1876 int flag;
1877 char *str;
1878 } xfs_info[] = {
1879 /* the few simple ones we can get from the mount struct */
1880 { XFS_MOUNT_WSYNC, "," MNTOPT_WSYNC },
1881 { XFS_MOUNT_INO64, "," MNTOPT_INO64 },
1882 { XFS_MOUNT_NOALIGN, "," MNTOPT_NOALIGN },
1883 { XFS_MOUNT_SWALLOC, "," MNTOPT_SWALLOC },
1884 { XFS_MOUNT_NOUUID, "," MNTOPT_NOUUID },
1885 { XFS_MOUNT_NORECOVERY, "," MNTOPT_NORECOVERY },
1886 { XFS_MOUNT_OSYNCISOSYNC, "," MNTOPT_OSYNCISOSYNC },
1887 { XFS_MOUNT_NOLOGFLUSH, "," MNTOPT_NOLOGFLUSH },
1888 { XFS_MOUNT_IDELETE, "," MNTOPT_NOIKEEP },
1889 { 0, NULL }
1890 };
1891 struct proc_xfs_info *xfs_infop;
1892 struct xfs_mount *mp = XFS_BHVTOM(bhv);
1893
1894 for (xfs_infop = xfs_info; xfs_infop->flag; xfs_infop++) {
1895 if (mp->m_flags & xfs_infop->flag)
1896 seq_puts(m, xfs_infop->str);
1897 }
1898
1899 if (mp->m_flags & XFS_MOUNT_IHASHSIZE)
1900 seq_printf(m, "," MNTOPT_IHASHSIZE "=%d", mp->m_ihsize);
1901
1902 if (mp->m_flags & XFS_MOUNT_DFLT_IOSIZE)
1903 seq_printf(m, "," MNTOPT_ALLOCSIZE "=%d", 1<<mp->m_writeio_log);
1904
1905 if (mp->m_logbufs > 0)
1906 seq_printf(m, "," MNTOPT_LOGBUFS "=%d", mp->m_logbufs);
1907
1908 if (mp->m_logbsize > 0)
1909 seq_printf(m, "," MNTOPT_LOGBSIZE "=%d", mp->m_logbsize);
1910
1911 if (mp->m_ddev_targp != mp->m_logdev_targp)
1912 seq_printf(m, "," MNTOPT_LOGDEV "=%s",
1913 XFS_BUFTARG_NAME(mp->m_logdev_targp));
1914
1915 if (mp->m_rtdev_targp && mp->m_ddev_targp != mp->m_rtdev_targp)
1916 seq_printf(m, "," MNTOPT_RTDEV "=%s",
1917 XFS_BUFTARG_NAME(mp->m_rtdev_targp));
1918
1919 if (mp->m_dalign > 0)
1920 seq_printf(m, "," MNTOPT_SUNIT "=%d",
1921 (int)XFS_FSB_TO_BB(mp, mp->m_dalign));
1922
1923 if (mp->m_swidth > 0)
1924 seq_printf(m, "," MNTOPT_SWIDTH "=%d",
1925 (int)XFS_FSB_TO_BB(mp, mp->m_swidth));
1926
1927 if (!(mp->m_flags & XFS_MOUNT_32BITINOOPT))
1928 seq_printf(m, "," MNTOPT_64BITINODE);
1929
1930 return 0;
1931 }
1932
1933 STATIC void
1934 xfs_freeze(
1935 bhv_desc_t *bdp)
1936 {
1937 xfs_mount_t *mp = XFS_BHVTOM(bdp);
1938
1939 while (atomic_read(&mp->m_active_trans) > 0)
1940 delay(100);
1941
1942 /* Push the superblock and write an unmount record */
1943 xfs_log_unmount_write(mp);
1944 xfs_unmountfs_writesb(mp);
1945 }
1946
1947
1948 vfsops_t xfs_vfsops = {
1949 BHV_IDENTITY_INIT(VFS_BHV_XFS,VFS_POSITION_XFS),
1950 .vfs_parseargs = xfs_parseargs,
1951 .vfs_showargs = xfs_showargs,
1952 .vfs_mount = xfs_mount,
1953 .vfs_unmount = xfs_unmount,
1954 .vfs_mntupdate = xfs_mntupdate,
1955 .vfs_root = xfs_root,
1956 .vfs_statvfs = xfs_statvfs,
1957 .vfs_sync = xfs_sync,
1958 .vfs_vget = xfs_vget,
1959 .vfs_dmapiops = (vfs_dmapiops_t)fs_nosys,
1960 .vfs_quotactl = (vfs_quotactl_t)fs_nosys,
1961 .vfs_init_vnode = xfs_initialize_vnode,
1962 .vfs_force_shutdown = xfs_do_force_shutdown,
1963 .vfs_freeze = xfs_freeze,
1964 };
linux-next