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[JFFS2] Check for all-zero node headers
[linux-2.6/kmemtrace.git] / fs / xfs / xfs_vfsops.c
blob29f72f613782a6a1a2d09bc6570e880d65af313a
1 /*
2 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
3 * All Rights Reserved.
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
7 * published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it would be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write the Free Software Foundation,
16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
17 */
18 #include "xfs.h"
19 #include "xfs_fs.h"
20 #include "xfs_types.h"
21 #include "xfs_bit.h"
22 #include "xfs_log.h"
23 #include "xfs_inum.h"
24 #include "xfs_trans.h"
25 #include "xfs_sb.h"
26 #include "xfs_ag.h"
27 #include "xfs_dir2.h"
28 #include "xfs_dmapi.h"
29 #include "xfs_mount.h"
30 #include "xfs_da_btree.h"
31 #include "xfs_bmap_btree.h"
32 #include "xfs_ialloc_btree.h"
33 #include "xfs_alloc_btree.h"
34 #include "xfs_dir2_sf.h"
35 #include "xfs_attr_sf.h"
36 #include "xfs_dinode.h"
37 #include "xfs_inode.h"
38 #include "xfs_inode_item.h"
39 #include "xfs_btree.h"
40 #include "xfs_alloc.h"
41 #include "xfs_ialloc.h"
42 #include "xfs_quota.h"
43 #include "xfs_error.h"
44 #include "xfs_bmap.h"
45 #include "xfs_rw.h"
46 #include "xfs_refcache.h"
47 #include "xfs_buf_item.h"
48 #include "xfs_log_priv.h"
49 #include "xfs_dir2_trace.h"
50 #include "xfs_extfree_item.h"
51 #include "xfs_acl.h"
52 #include "xfs_attr.h"
53 #include "xfs_clnt.h"
54 #include "xfs_fsops.h"
55
56 STATIC int xfs_sync(bhv_desc_t *, int, cred_t *);
57
58 int
59 xfs_init(void)
60 {
61 extern kmem_zone_t *xfs_bmap_free_item_zone;
62 extern kmem_zone_t *xfs_btree_cur_zone;
63 extern kmem_zone_t *xfs_trans_zone;
64 extern kmem_zone_t *xfs_buf_item_zone;
65 extern kmem_zone_t *xfs_dabuf_zone;
66 #ifdef XFS_DABUF_DEBUG
67 extern lock_t xfs_dabuf_global_lock;
68 spinlock_init(&xfs_dabuf_global_lock, "xfsda");
69 #endif
70
71 /*
72 * Initialize all of the zone allocators we use.
73 */
74 xfs_bmap_free_item_zone = kmem_zone_init(sizeof(xfs_bmap_free_item_t),
75 "xfs_bmap_free_item");
76 xfs_btree_cur_zone = kmem_zone_init(sizeof(xfs_btree_cur_t),
77 "xfs_btree_cur");
78 xfs_trans_zone = kmem_zone_init(sizeof(xfs_trans_t), "xfs_trans");
79 xfs_da_state_zone =
80 kmem_zone_init(sizeof(xfs_da_state_t), "xfs_da_state");
81 xfs_dabuf_zone = kmem_zone_init(sizeof(xfs_dabuf_t), "xfs_dabuf");
82 xfs_ifork_zone = kmem_zone_init(sizeof(xfs_ifork_t), "xfs_ifork");
83 xfs_acl_zone_init(xfs_acl_zone, "xfs_acl");
84
85 /*
86 * The size of the zone allocated buf log item is the maximum
87 * size possible under XFS. This wastes a little bit of memory,
88 * but it is much faster.
89 */
90 xfs_buf_item_zone =
91 kmem_zone_init((sizeof(xfs_buf_log_item_t) +
92 (((XFS_MAX_BLOCKSIZE / XFS_BLI_CHUNK) /
93 NBWORD) * sizeof(int))),
94 "xfs_buf_item");
95 xfs_efd_zone =
96 kmem_zone_init((sizeof(xfs_efd_log_item_t) +
97 ((XFS_EFD_MAX_FAST_EXTENTS - 1) *
98 sizeof(xfs_extent_t))),
99 "xfs_efd_item");
100 xfs_efi_zone =
101 kmem_zone_init((sizeof(xfs_efi_log_item_t) +
102 ((XFS_EFI_MAX_FAST_EXTENTS - 1) *
103 sizeof(xfs_extent_t))),
104 "xfs_efi_item");
105
106 /*
107 * These zones warrant special memory allocator hints
108 */
109 xfs_inode_zone =
110 kmem_zone_init_flags(sizeof(xfs_inode_t), "xfs_inode",
111 KM_ZONE_HWALIGN | KM_ZONE_RECLAIM |
112 KM_ZONE_SPREAD, NULL);
113 xfs_ili_zone =
114 kmem_zone_init_flags(sizeof(xfs_inode_log_item_t), "xfs_ili",
115 KM_ZONE_SPREAD, NULL);
116 xfs_chashlist_zone =
117 kmem_zone_init_flags(sizeof(xfs_chashlist_t), "xfs_chashlist",
118 KM_ZONE_SPREAD, NULL);
119
120 /*
121 * Allocate global trace buffers.
122 */
123 #ifdef XFS_ALLOC_TRACE
124 xfs_alloc_trace_buf = ktrace_alloc(XFS_ALLOC_TRACE_SIZE, KM_SLEEP);
125 #endif
126 #ifdef XFS_BMAP_TRACE
127 xfs_bmap_trace_buf = ktrace_alloc(XFS_BMAP_TRACE_SIZE, KM_SLEEP);
128 #endif
129 #ifdef XFS_BMBT_TRACE
130 xfs_bmbt_trace_buf = ktrace_alloc(XFS_BMBT_TRACE_SIZE, KM_SLEEP);
131 #endif
132 #ifdef XFS_ATTR_TRACE
133 xfs_attr_trace_buf = ktrace_alloc(XFS_ATTR_TRACE_SIZE, KM_SLEEP);
134 #endif
135 #ifdef XFS_DIR2_TRACE
136 xfs_dir2_trace_buf = ktrace_alloc(XFS_DIR2_GTRACE_SIZE, KM_SLEEP);
137 #endif
138
139 xfs_dir_startup();
140
141 #if (defined(DEBUG) || defined(INDUCE_IO_ERROR))
142 xfs_error_test_init();
143 #endif /* DEBUG || INDUCE_IO_ERROR */
144
145 xfs_init_procfs();
146 xfs_sysctl_register();
147 return 0;
148 }
149
150 void
151 xfs_cleanup(void)
152 {
153 extern kmem_zone_t *xfs_bmap_free_item_zone;
154 extern kmem_zone_t *xfs_btree_cur_zone;
155 extern kmem_zone_t *xfs_inode_zone;
156 extern kmem_zone_t *xfs_trans_zone;
157 extern kmem_zone_t *xfs_da_state_zone;
158 extern kmem_zone_t *xfs_dabuf_zone;
159 extern kmem_zone_t *xfs_efd_zone;
160 extern kmem_zone_t *xfs_efi_zone;
161 extern kmem_zone_t *xfs_buf_item_zone;
162 extern kmem_zone_t *xfs_chashlist_zone;
163
164 xfs_cleanup_procfs();
165 xfs_sysctl_unregister();
166 xfs_refcache_destroy();
167 xfs_acl_zone_destroy(xfs_acl_zone);
168
169 #ifdef XFS_DIR2_TRACE
170 ktrace_free(xfs_dir2_trace_buf);
171 #endif
172 #ifdef XFS_ATTR_TRACE
173 ktrace_free(xfs_attr_trace_buf);
174 #endif
175 #ifdef XFS_BMBT_TRACE
176 ktrace_free(xfs_bmbt_trace_buf);
177 #endif
178 #ifdef XFS_BMAP_TRACE
179 ktrace_free(xfs_bmap_trace_buf);
180 #endif
181 #ifdef XFS_ALLOC_TRACE
182 ktrace_free(xfs_alloc_trace_buf);
183 #endif
184
185 kmem_zone_destroy(xfs_bmap_free_item_zone);
186 kmem_zone_destroy(xfs_btree_cur_zone);
187 kmem_zone_destroy(xfs_inode_zone);
188 kmem_zone_destroy(xfs_trans_zone);
189 kmem_zone_destroy(xfs_da_state_zone);
190 kmem_zone_destroy(xfs_dabuf_zone);
191 kmem_zone_destroy(xfs_buf_item_zone);
192 kmem_zone_destroy(xfs_efd_zone);
193 kmem_zone_destroy(xfs_efi_zone);
194 kmem_zone_destroy(xfs_ifork_zone);
195 kmem_zone_destroy(xfs_ili_zone);
196 kmem_zone_destroy(xfs_chashlist_zone);
197 }
198
199 /*
200 * xfs_start_flags
201 *
202 * This function fills in xfs_mount_t fields based on mount args.
203 * Note: the superblock has _not_ yet been read in.
204 */
205 STATIC int
206 xfs_start_flags(
207 struct bhv_vfs *vfs,
208 struct xfs_mount_args *ap,
209 struct xfs_mount *mp)
210 {
211 /* Values are in BBs */
212 if ((ap->flags & XFSMNT_NOALIGN) != XFSMNT_NOALIGN) {
213 /*
214 * At this point the superblock has not been read
215 * in, therefore we do not know the block size.
216 * Before the mount call ends we will convert
217 * these to FSBs.
218 */
219 mp->m_dalign = ap->sunit;
220 mp->m_swidth = ap->swidth;
221 }
222
223 if (ap->logbufs != -1 &&
224 ap->logbufs != 0 &&
225 (ap->logbufs < XLOG_MIN_ICLOGS ||
226 ap->logbufs > XLOG_MAX_ICLOGS)) {
227 cmn_err(CE_WARN,
228 "XFS: invalid logbufs value: %d [not %d-%d]",
229 ap->logbufs, XLOG_MIN_ICLOGS, XLOG_MAX_ICLOGS);
230 return XFS_ERROR(EINVAL);
231 }
232 mp->m_logbufs = ap->logbufs;
233 if (ap->logbufsize != -1 &&
234 ap->logbufsize != 0 &&
235 ap->logbufsize != 16 * 1024 &&
236 ap->logbufsize != 32 * 1024 &&
237 ap->logbufsize != 64 * 1024 &&
238 ap->logbufsize != 128 * 1024 &&
239 ap->logbufsize != 256 * 1024) {
240 cmn_err(CE_WARN,
241 "XFS: invalid logbufsize: %d [not 16k,32k,64k,128k or 256k]",
242 ap->logbufsize);
243 return XFS_ERROR(EINVAL);
244 }
245 mp->m_ihsize = ap->ihashsize;
246 mp->m_logbsize = ap->logbufsize;
247 mp->m_fsname_len = strlen(ap->fsname) + 1;
248 mp->m_fsname = kmem_alloc(mp->m_fsname_len, KM_SLEEP);
249 strcpy(mp->m_fsname, ap->fsname);
250 if (ap->rtname[0]) {
251 mp->m_rtname = kmem_alloc(strlen(ap->rtname) + 1, KM_SLEEP);
252 strcpy(mp->m_rtname, ap->rtname);
253 }
254 if (ap->logname[0]) {
255 mp->m_logname = kmem_alloc(strlen(ap->logname) + 1, KM_SLEEP);
256 strcpy(mp->m_logname, ap->logname);
257 }
258
259 if (ap->flags & XFSMNT_WSYNC)
260 mp->m_flags |= XFS_MOUNT_WSYNC;
261 #if XFS_BIG_INUMS
262 if (ap->flags & XFSMNT_INO64) {
263 mp->m_flags |= XFS_MOUNT_INO64;
264 mp->m_inoadd = XFS_INO64_OFFSET;
265 }
266 #endif
267 if (ap->flags & XFSMNT_RETERR)
268 mp->m_flags |= XFS_MOUNT_RETERR;
269 if (ap->flags & XFSMNT_NOALIGN)
270 mp->m_flags |= XFS_MOUNT_NOALIGN;
271 if (ap->flags & XFSMNT_SWALLOC)
272 mp->m_flags |= XFS_MOUNT_SWALLOC;
273 if (ap->flags & XFSMNT_OSYNCISOSYNC)
274 mp->m_flags |= XFS_MOUNT_OSYNCISOSYNC;
275 if (ap->flags & XFSMNT_32BITINODES)
276 mp->m_flags |= XFS_MOUNT_32BITINODES;
277
278 if (ap->flags & XFSMNT_IOSIZE) {
279 if (ap->iosizelog > XFS_MAX_IO_LOG ||
280 ap->iosizelog < XFS_MIN_IO_LOG) {
281 cmn_err(CE_WARN,
282 "XFS: invalid log iosize: %d [not %d-%d]",
283 ap->iosizelog, XFS_MIN_IO_LOG,
284 XFS_MAX_IO_LOG);
285 return XFS_ERROR(EINVAL);
286 }
287
288 mp->m_flags |= XFS_MOUNT_DFLT_IOSIZE;
289 mp->m_readio_log = mp->m_writeio_log = ap->iosizelog;
290 }
291
292 if (ap->flags & XFSMNT_IHASHSIZE)
293 mp->m_flags |= XFS_MOUNT_IHASHSIZE;
294 if (ap->flags & XFSMNT_IDELETE)
295 mp->m_flags |= XFS_MOUNT_IDELETE;
296 if (ap->flags & XFSMNT_DIRSYNC)
297 mp->m_flags |= XFS_MOUNT_DIRSYNC;
298 if (ap->flags & XFSMNT_ATTR2)
299 mp->m_flags |= XFS_MOUNT_ATTR2;
300
301 if (ap->flags2 & XFSMNT2_COMPAT_IOSIZE)
302 mp->m_flags |= XFS_MOUNT_COMPAT_IOSIZE;
303
304 /*
305 * no recovery flag requires a read-only mount
306 */
307 if (ap->flags & XFSMNT_NORECOVERY) {
308 if (!(vfs->vfs_flag & VFS_RDONLY)) {
309 cmn_err(CE_WARN,
310 "XFS: tried to mount a FS read-write without recovery!");
311 return XFS_ERROR(EINVAL);
312 }
313 mp->m_flags |= XFS_MOUNT_NORECOVERY;
314 }
315
316 if (ap->flags & XFSMNT_NOUUID)
317 mp->m_flags |= XFS_MOUNT_NOUUID;
318 if (ap->flags & XFSMNT_BARRIER)
319 mp->m_flags |= XFS_MOUNT_BARRIER;
320 else
321 mp->m_flags &= ~XFS_MOUNT_BARRIER;
322
323 return 0;
324 }
325
326 /*
327 * This function fills in xfs_mount_t fields based on mount args.
328 * Note: the superblock _has_ now been read in.
329 */
330 STATIC int
331 xfs_finish_flags(
332 struct bhv_vfs *vfs,
333 struct xfs_mount_args *ap,
334 struct xfs_mount *mp)
335 {
336 int ronly = (vfs->vfs_flag & VFS_RDONLY);
337
338 /* Fail a mount where the logbuf is smaller then the log stripe */
339 if (XFS_SB_VERSION_HASLOGV2(&mp->m_sb)) {
340 if ((ap->logbufsize <= 0) &&
341 (mp->m_sb.sb_logsunit > XLOG_BIG_RECORD_BSIZE)) {
342 mp->m_logbsize = mp->m_sb.sb_logsunit;
343 } else if (ap->logbufsize > 0 &&
344 ap->logbufsize < mp->m_sb.sb_logsunit) {
345 cmn_err(CE_WARN,
346 "XFS: logbuf size must be greater than or equal to log stripe size");
347 return XFS_ERROR(EINVAL);
348 }
349 } else {
350 /* Fail a mount if the logbuf is larger than 32K */
351 if (ap->logbufsize > XLOG_BIG_RECORD_BSIZE) {
352 cmn_err(CE_WARN,
353 "XFS: logbuf size for version 1 logs must be 16K or 32K");
354 return XFS_ERROR(EINVAL);
355 }
356 }
357
358 if (XFS_SB_VERSION_HASATTR2(&mp->m_sb)) {
359 mp->m_flags |= XFS_MOUNT_ATTR2;
360 }
361
362 /*
363 * prohibit r/w mounts of read-only filesystems
364 */
365 if ((mp->m_sb.sb_flags & XFS_SBF_READONLY) && !ronly) {
366 cmn_err(CE_WARN,
367 "XFS: cannot mount a read-only filesystem as read-write");
368 return XFS_ERROR(EROFS);
369 }
370
371 /*
372 * check for shared mount.
373 */
374 if (ap->flags & XFSMNT_SHARED) {
375 if (!XFS_SB_VERSION_HASSHARED(&mp->m_sb))
376 return XFS_ERROR(EINVAL);
377
378 /*
379 * For IRIX 6.5, shared mounts must have the shared
380 * version bit set, have the persistent readonly
381 * field set, must be version 0 and can only be mounted
382 * read-only.
383 */
384 if (!ronly || !(mp->m_sb.sb_flags & XFS_SBF_READONLY) ||
385 (mp->m_sb.sb_shared_vn != 0))
386 return XFS_ERROR(EINVAL);
387
388 mp->m_flags |= XFS_MOUNT_SHARED;
389
390 /*
391 * Shared XFS V0 can't deal with DMI. Return EINVAL.
392 */
393 if (mp->m_sb.sb_shared_vn == 0 && (ap->flags & XFSMNT_DMAPI))
394 return XFS_ERROR(EINVAL);
395 }
396
397 return 0;
398 }
399
400 /*
401 * xfs_mount
402 *
403 * The file system configurations are:
404 * (1) device (partition) with data and internal log
405 * (2) logical volume with data and log subvolumes.
406 * (3) logical volume with data, log, and realtime subvolumes.
407 *
408 * We only have to handle opening the log and realtime volumes here if
409 * they are present. The data subvolume has already been opened by
410 * get_sb_bdev() and is stored in vfsp->vfs_super->s_bdev.
411 */
412 STATIC int
413 xfs_mount(
414 struct bhv_desc *bhvp,
415 struct xfs_mount_args *args,
416 cred_t *credp)
417 {
418 struct bhv_vfs *vfsp = bhvtovfs(bhvp);
419 struct bhv_desc *p;
420 struct xfs_mount *mp = XFS_BHVTOM(bhvp);
421 struct block_device *ddev, *logdev, *rtdev;
422 int flags = 0, error;
423
424 ddev = vfsp->vfs_super->s_bdev;
425 logdev = rtdev = NULL;
426
427 /*
428 * Setup xfs_mount function vectors from available behaviors
429 */
430 p = vfs_bhv_lookup(vfsp, VFS_POSITION_DM);
431 mp->m_dm_ops = p ? *(xfs_dmops_t *) vfs_bhv_custom(p) : xfs_dmcore_stub;
432 p = vfs_bhv_lookup(vfsp, VFS_POSITION_QM);
433 mp->m_qm_ops = p ? *(xfs_qmops_t *) vfs_bhv_custom(p) : xfs_qmcore_stub;
434 p = vfs_bhv_lookup(vfsp, VFS_POSITION_IO);
435 mp->m_io_ops = p ? *(xfs_ioops_t *) vfs_bhv_custom(p) : xfs_iocore_xfs;
436
437 if (args->flags & XFSMNT_QUIET)
438 flags |= XFS_MFSI_QUIET;
439
440 /*
441 * Open real time and log devices - order is important.
442 */
443 if (args->logname[0]) {
444 error = xfs_blkdev_get(mp, args->logname, &logdev);
445 if (error)
446 return error;
447 }
448 if (args->rtname[0]) {
449 error = xfs_blkdev_get(mp, args->rtname, &rtdev);
450 if (error) {
451 xfs_blkdev_put(logdev);
452 return error;
453 }
454
455 if (rtdev == ddev || rtdev == logdev) {
456 cmn_err(CE_WARN,
457 "XFS: Cannot mount filesystem with identical rtdev and ddev/logdev.");
458 xfs_blkdev_put(logdev);
459 xfs_blkdev_put(rtdev);
460 return EINVAL;
461 }
462 }
463
464 /*
465 * Setup xfs_mount buffer target pointers
466 */
467 error = ENOMEM;
468 mp->m_ddev_targp = xfs_alloc_buftarg(ddev, 0);
469 if (!mp->m_ddev_targp) {
470 xfs_blkdev_put(logdev);
471 xfs_blkdev_put(rtdev);
472 return error;
473 }
474 if (rtdev) {
475 mp->m_rtdev_targp = xfs_alloc_buftarg(rtdev, 1);
476 if (!mp->m_rtdev_targp)
477 goto error0;
478 }
479 mp->m_logdev_targp = (logdev && logdev != ddev) ?
480 xfs_alloc_buftarg(logdev, 1) : mp->m_ddev_targp;
481 if (!mp->m_logdev_targp)
482 goto error0;
483
484 /*
485 * Setup flags based on mount(2) options and then the superblock
486 */
487 error = xfs_start_flags(vfsp, args, mp);
488 if (error)
489 goto error1;
490 error = xfs_readsb(mp, flags);
491 if (error)
492 goto error1;
493 error = xfs_finish_flags(vfsp, args, mp);
494 if (error)
495 goto error2;
496
497 /*
498 * Setup xfs_mount buffer target pointers based on superblock
499 */
500 error = xfs_setsize_buftarg(mp->m_ddev_targp, mp->m_sb.sb_blocksize,
501 mp->m_sb.sb_sectsize);
502 if (!error && logdev && logdev != ddev) {
503 unsigned int log_sector_size = BBSIZE;
504
505 if (XFS_SB_VERSION_HASSECTOR(&mp->m_sb))
506 log_sector_size = mp->m_sb.sb_logsectsize;
507 error = xfs_setsize_buftarg(mp->m_logdev_targp,
508 mp->m_sb.sb_blocksize,
509 log_sector_size);
510 }
511 if (!error && rtdev)
512 error = xfs_setsize_buftarg(mp->m_rtdev_targp,
513 mp->m_sb.sb_blocksize,
514 mp->m_sb.sb_sectsize);
515 if (error)
516 goto error2;
517
518 if (mp->m_flags & XFS_MOUNT_BARRIER)
519 xfs_mountfs_check_barriers(mp);
520
521 error = XFS_IOINIT(vfsp, args, flags);
522 if (error)
523 goto error2;
524
525 return 0;
526
527 error2:
528 if (mp->m_sb_bp)
529 xfs_freesb(mp);
530 error1:
531 xfs_binval(mp->m_ddev_targp);
532 if (logdev && logdev != ddev)
533 xfs_binval(mp->m_logdev_targp);
534 if (rtdev)
535 xfs_binval(mp->m_rtdev_targp);
536 error0:
537 xfs_unmountfs_close(mp, credp);
538 return error;
539 }
540
541 STATIC int
542 xfs_unmount(
543 bhv_desc_t *bdp,
544 int flags,
545 cred_t *credp)
546 {
547 bhv_vfs_t *vfsp = bhvtovfs(bdp);
548 xfs_mount_t *mp = XFS_BHVTOM(bdp);
549 xfs_inode_t *rip;
550 bhv_vnode_t *rvp;
551 int unmount_event_wanted = 0;
552 int unmount_event_flags = 0;
553 int xfs_unmountfs_needed = 0;
554 int error;
555
556 rip = mp->m_rootip;
557 rvp = XFS_ITOV(rip);
558
559 if (vfsp->vfs_flag & VFS_DMI) {
560 error = XFS_SEND_PREUNMOUNT(mp, vfsp,
561 rvp, DM_RIGHT_NULL, rvp, DM_RIGHT_NULL,
562 NULL, NULL, 0, 0,
563 (mp->m_dmevmask & (1<<DM_EVENT_PREUNMOUNT))?
564 0:DM_FLAGS_UNWANTED);
565 if (error)
566 return XFS_ERROR(error);
567 unmount_event_wanted = 1;
568 unmount_event_flags = (mp->m_dmevmask & (1<<DM_EVENT_UNMOUNT))?
569 0 : DM_FLAGS_UNWANTED;
570 }
571
572 /*
573 * First blow any referenced inode from this file system
574 * out of the reference cache, and delete the timer.
575 */
576 xfs_refcache_purge_mp(mp);
577
578 XFS_bflush(mp->m_ddev_targp);
579 error = xfs_unmount_flush(mp, 0);
580 if (error)
581 goto out;
582
583 ASSERT(vn_count(rvp) == 1);
584
585 /*
586 * Drop the reference count
587 */
588 VN_RELE(rvp);
589
590 /*
591 * If we're forcing a shutdown, typically because of a media error,
592 * we want to make sure we invalidate dirty pages that belong to
593 * referenced vnodes as well.
594 */
595 if (XFS_FORCED_SHUTDOWN(mp)) {
596 error = xfs_sync(&mp->m_bhv,
597 (SYNC_WAIT | SYNC_CLOSE), credp);
598 ASSERT(error != EFSCORRUPTED);
599 }
600 xfs_unmountfs_needed = 1;
601
602 out:
603 /* Send DMAPI event, if required.
604 * Then do xfs_unmountfs() if needed.
605 * Then return error (or zero).
606 */
607 if (unmount_event_wanted) {
608 /* Note: mp structure must still exist for
609 * XFS_SEND_UNMOUNT() call.
610 */
611 XFS_SEND_UNMOUNT(mp, vfsp, error == 0 ? rvp : NULL,
612 DM_RIGHT_NULL, 0, error, unmount_event_flags);
613 }
614 if (xfs_unmountfs_needed) {
615 /*
616 * Call common unmount function to flush to disk
617 * and free the super block buffer & mount structures.
618 */
619 xfs_unmountfs(mp, credp);
620 }
621
622 return XFS_ERROR(error);
623 }
624
625 STATIC int
626 xfs_quiesce_fs(
627 xfs_mount_t *mp)
628 {
629 int count = 0, pincount;
630
631 xfs_refcache_purge_mp(mp);
632 xfs_flush_buftarg(mp->m_ddev_targp, 0);
633 xfs_finish_reclaim_all(mp, 0);
634
635 /* This loop must run at least twice.
636 * The first instance of the loop will flush
637 * most meta data but that will generate more
638 * meta data (typically directory updates).
639 * Which then must be flushed and logged before
640 * we can write the unmount record.
641 */
642 do {
643 xfs_syncsub(mp, SYNC_REMOUNT|SYNC_ATTR|SYNC_WAIT, NULL);
644 pincount = xfs_flush_buftarg(mp->m_ddev_targp, 1);
645 if (!pincount) {
646 delay(50);
647 count++;
648 }
649 } while (count < 2);
650
651 return 0;
652 }
653
654 STATIC int
655 xfs_mntupdate(
656 bhv_desc_t *bdp,
657 int *flags,
658 struct xfs_mount_args *args)
659 {
660 bhv_vfs_t *vfsp = bhvtovfs(bdp);
661 xfs_mount_t *mp = XFS_BHVTOM(bdp);
662
663 if (!(*flags & MS_RDONLY)) { /* rw/ro -> rw */
664 if (vfsp->vfs_flag & VFS_RDONLY)
665 vfsp->vfs_flag &= ~VFS_RDONLY;
666 if (args->flags & XFSMNT_BARRIER) {
667 mp->m_flags |= XFS_MOUNT_BARRIER;
668 xfs_mountfs_check_barriers(mp);
669 } else {
670 mp->m_flags &= ~XFS_MOUNT_BARRIER;
671 }
672 } else if (!(vfsp->vfs_flag & VFS_RDONLY)) { /* rw -> ro */
673 bhv_vfs_sync(vfsp, SYNC_FSDATA|SYNC_BDFLUSH|SYNC_ATTR, NULL);
674 xfs_quiesce_fs(mp);
675 xfs_log_unmount_write(mp);
676 xfs_unmountfs_writesb(mp);
677 vfsp->vfs_flag |= VFS_RDONLY;
678 }
679 return 0;
680 }
681
682 /*
683 * xfs_unmount_flush implements a set of flush operation on special
684 * inodes, which are needed as a separate set of operations so that
685 * they can be called as part of relocation process.
686 */
687 int
688 xfs_unmount_flush(
689 xfs_mount_t *mp, /* Mount structure we are getting
690 rid of. */
691 int relocation) /* Called from vfs relocation. */
692 {
693 xfs_inode_t *rip = mp->m_rootip;
694 xfs_inode_t *rbmip;
695 xfs_inode_t *rsumip = NULL;
696 bhv_vnode_t *rvp = XFS_ITOV(rip);
697 int error;
698
699 xfs_ilock(rip, XFS_ILOCK_EXCL);
700 xfs_iflock(rip);
701
702 /*
703 * Flush out the real time inodes.
704 */
705 if ((rbmip = mp->m_rbmip) != NULL) {
706 xfs_ilock(rbmip, XFS_ILOCK_EXCL);
707 xfs_iflock(rbmip);
708 error = xfs_iflush(rbmip, XFS_IFLUSH_SYNC);
709 xfs_iunlock(rbmip, XFS_ILOCK_EXCL);
710
711 if (error == EFSCORRUPTED)
712 goto fscorrupt_out;
713
714 ASSERT(vn_count(XFS_ITOV(rbmip)) == 1);
715
716 rsumip = mp->m_rsumip;
717 xfs_ilock(rsumip, XFS_ILOCK_EXCL);
718 xfs_iflock(rsumip);
719 error = xfs_iflush(rsumip, XFS_IFLUSH_SYNC);
720 xfs_iunlock(rsumip, XFS_ILOCK_EXCL);
721
722 if (error == EFSCORRUPTED)
723 goto fscorrupt_out;
724
725 ASSERT(vn_count(XFS_ITOV(rsumip)) == 1);
726 }
727
728 /*
729 * Synchronously flush root inode to disk
730 */
731 error = xfs_iflush(rip, XFS_IFLUSH_SYNC);
732 if (error == EFSCORRUPTED)
733 goto fscorrupt_out2;
734
735 if (vn_count(rvp) != 1 && !relocation) {
736 xfs_iunlock(rip, XFS_ILOCK_EXCL);
737 return XFS_ERROR(EBUSY);
738 }
739
740 /*
741 * Release dquot that rootinode, rbmino and rsumino might be holding,
742 * flush and purge the quota inodes.
743 */
744 error = XFS_QM_UNMOUNT(mp);
745 if (error == EFSCORRUPTED)
746 goto fscorrupt_out2;
747
748 if (rbmip) {
749 VN_RELE(XFS_ITOV(rbmip));
750 VN_RELE(XFS_ITOV(rsumip));
751 }
752
753 xfs_iunlock(rip, XFS_ILOCK_EXCL);
754 return 0;
755
756 fscorrupt_out:
757 xfs_ifunlock(rip);
758
759 fscorrupt_out2:
760 xfs_iunlock(rip, XFS_ILOCK_EXCL);
761
762 return XFS_ERROR(EFSCORRUPTED);
763 }
764
765 /*
766 * xfs_root extracts the root vnode from a vfs.
767 *
768 * vfsp -- the vfs struct for the desired file system
769 * vpp -- address of the caller's vnode pointer which should be
770 * set to the desired fs root vnode
771 */
772 STATIC int
773 xfs_root(
774 bhv_desc_t *bdp,
775 bhv_vnode_t **vpp)
776 {
777 bhv_vnode_t *vp;
778
779 vp = XFS_ITOV((XFS_BHVTOM(bdp))->m_rootip);
780 VN_HOLD(vp);
781 *vpp = vp;
782 return 0;
783 }
784
785 /*
786 * xfs_statvfs
787 *
788 * Fill in the statvfs structure for the given file system. We use
789 * the superblock lock in the mount structure to ensure a consistent
790 * snapshot of the counters returned.
791 */
792 STATIC int
793 xfs_statvfs(
794 bhv_desc_t *bdp,
795 bhv_statvfs_t *statp,
796 bhv_vnode_t *vp)
797 {
798 __uint64_t fakeinos;
799 xfs_extlen_t lsize;
800 xfs_mount_t *mp;
801 xfs_sb_t *sbp;
802 unsigned long s;
803
804 mp = XFS_BHVTOM(bdp);
805 sbp = &(mp->m_sb);
806
807 statp->f_type = XFS_SB_MAGIC;
808
809 xfs_icsb_sync_counters_flags(mp, XFS_ICSB_LAZY_COUNT);
810 s = XFS_SB_LOCK(mp);
811 statp->f_bsize = sbp->sb_blocksize;
812 lsize = sbp->sb_logstart ? sbp->sb_logblocks : 0;
813 statp->f_blocks = sbp->sb_dblocks - lsize;
814 statp->f_bfree = statp->f_bavail =
815 sbp->sb_fdblocks - XFS_ALLOC_SET_ASIDE(mp);
816 fakeinos = statp->f_bfree << sbp->sb_inopblog;
817 #if XFS_BIG_INUMS
818 fakeinos += mp->m_inoadd;
819 #endif
820 statp->f_files =
821 MIN(sbp->sb_icount + fakeinos, (__uint64_t)XFS_MAXINUMBER);
822 if (mp->m_maxicount)
823 #if XFS_BIG_INUMS
824 if (!mp->m_inoadd)
825 #endif
826 statp->f_files = min_t(typeof(statp->f_files),
827 statp->f_files,
828 mp->m_maxicount);
829 statp->f_ffree = statp->f_files - (sbp->sb_icount - sbp->sb_ifree);
830 XFS_SB_UNLOCK(mp, s);
831
832 xfs_statvfs_fsid(statp, mp);
833 statp->f_namelen = MAXNAMELEN - 1;
834
835 return 0;
836 }
837
838
839 /*
840 * xfs_sync flushes any pending I/O to file system vfsp.
841 *
842 * This routine is called by vfs_sync() to make sure that things make it
843 * out to disk eventually, on sync() system calls to flush out everything,
844 * and when the file system is unmounted. For the vfs_sync() case, all
845 * we really need to do is sync out the log to make all of our meta-data
846 * updates permanent (except for timestamps). For calls from pflushd(),
847 * dirty pages are kept moving by calling pdflush() on the inodes
848 * containing them. We also flush the inodes that we can lock without
849 * sleeping and the superblock if we can lock it without sleeping from
850 * vfs_sync() so that items at the tail of the log are always moving out.
851 *
852 * Flags:
853 * SYNC_BDFLUSH - We're being called from vfs_sync() so we don't want
854 * to sleep if we can help it. All we really need
855 * to do is ensure that the log is synced at least
856 * periodically. We also push the inodes and
857 * superblock if we can lock them without sleeping
858 * and they are not pinned.
859 * SYNC_ATTR - We need to flush the inodes. If SYNC_BDFLUSH is not
860 * set, then we really want to lock each inode and flush
861 * it.
862 * SYNC_WAIT - All the flushes that take place in this call should
863 * be synchronous.
864 * SYNC_DELWRI - This tells us to push dirty pages associated with
865 * inodes. SYNC_WAIT and SYNC_BDFLUSH are used to
866 * determine if they should be flushed sync, async, or
867 * delwri.
868 * SYNC_CLOSE - This flag is passed when the system is being
869 * unmounted. We should sync and invalidate everything.
870 * SYNC_FSDATA - This indicates that the caller would like to make
871 * sure the superblock is safe on disk. We can ensure
872 * this by simply making sure the log gets flushed
873 * if SYNC_BDFLUSH is set, and by actually writing it
874 * out otherwise.
875 * SYNC_IOWAIT - The caller wants us to wait for all data I/O to complete
876 * before we return (including direct I/O). Forms the drain
877 * side of the write barrier needed to safely quiesce the
878 * filesystem.
879 *
880 */
881 /*ARGSUSED*/
882 STATIC int
883 xfs_sync(
884 bhv_desc_t *bdp,
885 int flags,
886 cred_t *credp)
887 {
888 xfs_mount_t *mp = XFS_BHVTOM(bdp);
889
890 return xfs_syncsub(mp, flags, NULL);
891 }
892
893 /*
894 * xfs sync routine for internal use
895 *
896 * This routine supports all of the flags defined for the generic vfs_sync
897 * interface as explained above under xfs_sync.
898 *
899 */
900 int
901 xfs_sync_inodes(
902 xfs_mount_t *mp,
903 int flags,
904 int *bypassed)
905 {
906 xfs_inode_t *ip = NULL;
907 xfs_inode_t *ip_next;
908 xfs_buf_t *bp;
909 bhv_vnode_t *vp = NULL;
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 | SYNC_DELWRI))
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 racy, 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.
1105 */
1106 if (xfs_ilock_nowait(ip, lock_flags) == 0) {
1107 if ((flags & SYNC_BDFLUSH) || (vp == NULL)) {
1108 ip = ip->i_mnext;
1109 continue;
1110 }
1111
1112 vp = vn_grab(vp);
1113 if (vp == NULL) {
1114 ip = ip->i_mnext;
1115 continue;
1116 }
1117
1118 IPOINTER_INSERT(ip, mp);
1119 xfs_ilock(ip, lock_flags);
1120
1121 ASSERT(vp == XFS_ITOV(ip));
1122 ASSERT(ip->i_mount == mp);
1123
1124 vnode_refed = B_TRUE;
1125 }
1126
1127 /* From here on in the loop we may have a marker record
1128 * in the inode list.
1129 */
1130
1131 if ((flags & SYNC_CLOSE) && (vp != NULL)) {
1132 /*
1133 * This is the shutdown case. We just need to
1134 * flush and invalidate all the pages associated
1135 * with the inode. Drop the inode lock since
1136 * we can't hold it across calls to the buffer
1137 * cache.
1138 *
1139 * We don't set the VREMAPPING bit in the vnode
1140 * here, because we don't hold the vnode lock
1141 * exclusively. It doesn't really matter, though,
1142 * because we only come here when we're shutting
1143 * down anyway.
1144 */
1145 xfs_iunlock(ip, XFS_ILOCK_SHARED);
1146
1147 if (XFS_FORCED_SHUTDOWN(mp)) {
1148 bhv_vop_toss_pages(vp, 0, -1, FI_REMAPF);
1149 } else {
1150 bhv_vop_flushinval_pages(vp, 0, -1, FI_REMAPF);
1151 }
1152
1153 xfs_ilock(ip, XFS_ILOCK_SHARED);
1154
1155 } else if ((flags & SYNC_DELWRI) && (vp != NULL)) {
1156 if (VN_DIRTY(vp)) {
1157 /* We need to have dropped the lock here,
1158 * so insert a marker if we have not already
1159 * done so.
1160 */
1161 if (mount_locked) {
1162 IPOINTER_INSERT(ip, mp);
1163 }
1164
1165 /*
1166 * Drop the inode lock since we can't hold it
1167 * across calls to the buffer cache.
1168 */
1169 xfs_iunlock(ip, XFS_ILOCK_SHARED);
1170 error = bhv_vop_flush_pages(vp, (xfs_off_t)0,
1171 -1, fflag, FI_NONE);
1172 xfs_ilock(ip, XFS_ILOCK_SHARED);
1173 }
1174
1175 }
1176 /*
1177 * When freezing, we need to wait ensure all I/O (including direct
1178 * I/O) is complete to ensure no further data modification can take
1179 * place after this point
1180 */
1181 if (flags & SYNC_IOWAIT)
1182 vn_iowait(vp);
1183
1184 if (flags & SYNC_BDFLUSH) {
1185 if ((flags & SYNC_ATTR) &&
1186 ((ip->i_update_core) ||
1187 ((ip->i_itemp != NULL) &&
1188 (ip->i_itemp->ili_format.ilf_fields != 0)))) {
1189
1190 /* Insert marker and drop lock if not already
1191 * done.
1192 */
1193 if (mount_locked) {
1194 IPOINTER_INSERT(ip, mp);
1195 }
1196
1197 /*
1198 * We don't want the periodic flushing of the
1199 * inodes by vfs_sync() to interfere with
1200 * I/O to the file, especially read I/O
1201 * where it is only the access time stamp
1202 * that is being flushed out. To prevent
1203 * long periods where we have both inode
1204 * locks held shared here while reading the
1205 * inode's buffer in from disk, we drop the
1206 * inode lock while reading in the inode
1207 * buffer. We have to release the buffer
1208 * and reacquire the inode lock so that they
1209 * are acquired in the proper order (inode
1210 * locks first). The buffer will go at the
1211 * end of the lru chain, though, so we can
1212 * expect it to still be there when we go
1213 * for it again in xfs_iflush().
1214 */
1215 if ((xfs_ipincount(ip) == 0) &&
1216 xfs_iflock_nowait(ip)) {
1217
1218 xfs_ifunlock(ip);
1219 xfs_iunlock(ip, XFS_ILOCK_SHARED);
1220
1221 error = xfs_itobp(mp, NULL, ip,
1222 &dip, &bp, 0, 0);
1223 if (!error) {
1224 xfs_buf_relse(bp);
1225 } else {
1226 /* Bailing out, remove the
1227 * marker and free it.
1228 */
1229 XFS_MOUNT_ILOCK(mp);
1230 IPOINTER_REMOVE(ip, mp);
1231 XFS_MOUNT_IUNLOCK(mp);
1232
1233 ASSERT(!(lock_flags &
1234 XFS_IOLOCK_SHARED));
1235
1236 kmem_free(ipointer,
1237 sizeof(xfs_iptr_t));
1238 return (0);
1239 }
1240
1241 /*
1242 * Since we dropped the inode lock,
1243 * the inode may have been reclaimed.
1244 * Therefore, we reacquire the mount
1245 * lock and check to see if we were the
1246 * inode reclaimed. If this happened
1247 * then the ipointer marker will no
1248 * longer point back at us. In this
1249 * case, move ip along to the inode
1250 * after the marker, remove the marker
1251 * and continue.
1252 */
1253 XFS_MOUNT_ILOCK(mp);
1254 mount_locked = B_TRUE;
1255
1256 if (ip != ipointer->ip_mprev) {
1257 IPOINTER_REMOVE(ip, mp);
1258
1259 ASSERT(!vnode_refed);
1260 ASSERT(!(lock_flags &
1261 XFS_IOLOCK_SHARED));
1262 continue;
1263 }
1264
1265 ASSERT(ip->i_mount == mp);
1266
1267 if (xfs_ilock_nowait(ip,
1268 XFS_ILOCK_SHARED) == 0) {
1269 ASSERT(ip->i_mount == mp);
1270 /*
1271 * We failed to reacquire
1272 * the inode lock without
1273 * sleeping, so just skip
1274 * the inode for now. We
1275 * clear the ILOCK bit from
1276 * the lock_flags so that we
1277 * won't try to drop a lock
1278 * we don't hold below.
1279 */
1280 lock_flags &= ~XFS_ILOCK_SHARED;
1281 IPOINTER_REMOVE(ip_next, mp);
1282 } else if ((xfs_ipincount(ip) == 0) &&
1283 xfs_iflock_nowait(ip)) {
1284 ASSERT(ip->i_mount == mp);
1285 /*
1286 * Since this is vfs_sync()
1287 * calling we only flush the
1288 * inode out if we can lock
1289 * it without sleeping and
1290 * it is not pinned. Drop
1291 * the mount lock here so
1292 * that we don't hold it for
1293 * too long. We already have
1294 * a marker in the list here.
1295 */
1296 XFS_MOUNT_IUNLOCK(mp);
1297 mount_locked = B_FALSE;
1298 error = xfs_iflush(ip,
1299 XFS_IFLUSH_DELWRI);
1300 } else {
1301 ASSERT(ip->i_mount == mp);
1302 IPOINTER_REMOVE(ip_next, mp);
1303 }
1304 }
1305
1306 }
1307
1308 } else {
1309 if ((flags & SYNC_ATTR) &&
1310 ((ip->i_update_core) ||
1311 ((ip->i_itemp != NULL) &&
1312 (ip->i_itemp->ili_format.ilf_fields != 0)))) {
1313 if (mount_locked) {
1314 IPOINTER_INSERT(ip, mp);
1315 }
1316
1317 if (flags & SYNC_WAIT) {
1318 xfs_iflock(ip);
1319 error = xfs_iflush(ip,
1320 XFS_IFLUSH_SYNC);
1321 } else {
1322 /*
1323 * If we can't acquire the flush
1324 * lock, then the inode is already
1325 * being flushed so don't bother
1326 * waiting. If we can lock it then
1327 * do a delwri flush so we can
1328 * combine multiple inode flushes
1329 * in each disk write.
1330 */
1331 if (xfs_iflock_nowait(ip)) {
1332 error = xfs_iflush(ip,
1333 XFS_IFLUSH_DELWRI);
1334 }
1335 else if (bypassed)
1336 (*bypassed)++;
1337 }
1338 }
1339 }
1340
1341 if (lock_flags != 0) {
1342 xfs_iunlock(ip, lock_flags);
1343 }
1344
1345 if (vnode_refed) {
1346 /*
1347 * If we had to take a reference on the vnode
1348 * above, then wait until after we've unlocked
1349 * the inode to release the reference. This is
1350 * because we can be already holding the inode
1351 * lock when VN_RELE() calls xfs_inactive().
1352 *
1353 * Make sure to drop the mount lock before calling
1354 * VN_RELE() so that we don't trip over ourselves if
1355 * we have to go for the mount lock again in the
1356 * inactive code.
1357 */
1358 if (mount_locked) {
1359 IPOINTER_INSERT(ip, mp);
1360 }
1361
1362 VN_RELE(vp);
1363
1364 vnode_refed = B_FALSE;
1365 }
1366
1367 if (error) {
1368 last_error = error;
1369 }
1370
1371 /*
1372 * bail out if the filesystem is corrupted.
1373 */
1374 if (error == EFSCORRUPTED) {
1375 if (!mount_locked) {
1376 XFS_MOUNT_ILOCK(mp);
1377 IPOINTER_REMOVE(ip, mp);
1378 }
1379 XFS_MOUNT_IUNLOCK(mp);
1380 ASSERT(ipointer_in == B_FALSE);
1381 kmem_free(ipointer, sizeof(xfs_iptr_t));
1382 return XFS_ERROR(error);
1383 }
1384
1385 /* Let other threads have a chance at the mount lock
1386 * if we have looped many times without dropping the
1387 * lock.
1388 */
1389 if ((++preempt & XFS_PREEMPT_MASK) == 0) {
1390 if (mount_locked) {
1391 IPOINTER_INSERT(ip, mp);
1392 }
1393 }
1394
1395 if (mount_locked == B_FALSE) {
1396 XFS_MOUNT_ILOCK(mp);
1397 mount_locked = B_TRUE;
1398 IPOINTER_REMOVE(ip, mp);
1399 continue;
1400 }
1401
1402 ASSERT(ipointer_in == B_FALSE);
1403 ip = ip->i_mnext;
1404
1405 } while (ip != mp->m_inodes);
1406
1407 XFS_MOUNT_IUNLOCK(mp);
1408
1409 ASSERT(ipointer_in == B_FALSE);
1410
1411 kmem_free(ipointer, sizeof(xfs_iptr_t));
1412 return XFS_ERROR(last_error);
1413 }
1414
1415 /*
1416 * xfs sync routine for internal use
1417 *
1418 * This routine supports all of the flags defined for the generic vfs_sync
1419 * interface as explained above under xfs_sync.
1420 *
1421 */
1422 int
1423 xfs_syncsub(
1424 xfs_mount_t *mp,
1425 int flags,
1426 int *bypassed)
1427 {
1428 int error = 0;
1429 int last_error = 0;
1430 uint log_flags = XFS_LOG_FORCE;
1431 xfs_buf_t *bp;
1432 xfs_buf_log_item_t *bip;
1433
1434 /*
1435 * Sync out the log. This ensures that the log is periodically
1436 * flushed even if there is not enough activity to fill it up.
1437 */
1438 if (flags & SYNC_WAIT)
1439 log_flags |= XFS_LOG_SYNC;
1440
1441 xfs_log_force(mp, (xfs_lsn_t)0, log_flags);
1442
1443 if (flags & (SYNC_ATTR|SYNC_DELWRI)) {
1444 if (flags & SYNC_BDFLUSH)
1445 xfs_finish_reclaim_all(mp, 1);
1446 else
1447 error = xfs_sync_inodes(mp, flags, bypassed);
1448 }
1449
1450 /*
1451 * Flushing out dirty data above probably generated more
1452 * log activity, so if this isn't vfs_sync() then flush
1453 * the log again.
1454 */
1455 if (flags & SYNC_DELWRI) {
1456 xfs_log_force(mp, (xfs_lsn_t)0, log_flags);
1457 }
1458
1459 if (flags & SYNC_FSDATA) {
1460 /*
1461 * If this is vfs_sync() then only sync the superblock
1462 * if we can lock it without sleeping and it is not pinned.
1463 */
1464 if (flags & SYNC_BDFLUSH) {
1465 bp = xfs_getsb(mp, XFS_BUF_TRYLOCK);
1466 if (bp != NULL) {
1467 bip = XFS_BUF_FSPRIVATE(bp,xfs_buf_log_item_t*);
1468 if ((bip != NULL) &&
1469 xfs_buf_item_dirty(bip)) {
1470 if (!(XFS_BUF_ISPINNED(bp))) {
1471 XFS_BUF_ASYNC(bp);
1472 error = xfs_bwrite(mp, bp);
1473 } else {
1474 xfs_buf_relse(bp);
1475 }
1476 } else {
1477 xfs_buf_relse(bp);
1478 }
1479 }
1480 } else {
1481 bp = xfs_getsb(mp, 0);
1482 /*
1483 * If the buffer is pinned then push on the log so
1484 * we won't get stuck waiting in the write for
1485 * someone, maybe ourselves, to flush the log.
1486 * Even though we just pushed the log above, we
1487 * did not have the superblock buffer locked at
1488 * that point so it can become pinned in between
1489 * there and here.
1490 */
1491 if (XFS_BUF_ISPINNED(bp))
1492 xfs_log_force(mp, (xfs_lsn_t)0, XFS_LOG_FORCE);
1493 if (flags & SYNC_WAIT)
1494 XFS_BUF_UNASYNC(bp);
1495 else
1496 XFS_BUF_ASYNC(bp);
1497 error = xfs_bwrite(mp, bp);
1498 }
1499 if (error) {
1500 last_error = error;
1501 }
1502 }
1503
1504 /*
1505 * If this is the periodic sync, then kick some entries out of
1506 * the reference cache. This ensures that idle entries are
1507 * eventually kicked out of the cache.
1508 */
1509 if (flags & SYNC_REFCACHE) {
1510 if (flags & SYNC_WAIT)
1511 xfs_refcache_purge_mp(mp);
1512 else
1513 xfs_refcache_purge_some(mp);
1514 }
1515
1516 /*
1517 * Now check to see if the log needs a "dummy" transaction.
1518 */
1519
1520 if (!(flags & SYNC_REMOUNT) && xfs_log_need_covered(mp)) {
1521 xfs_trans_t *tp;
1522 xfs_inode_t *ip;
1523
1524 /*
1525 * Put a dummy transaction in the log to tell
1526 * recovery that all others are OK.
1527 */
1528 tp = xfs_trans_alloc(mp, XFS_TRANS_DUMMY1);
1529 if ((error = xfs_trans_reserve(tp, 0,
1530 XFS_ICHANGE_LOG_RES(mp),
1531 0, 0, 0))) {
1532 xfs_trans_cancel(tp, 0);
1533 return error;
1534 }
1535
1536 ip = mp->m_rootip;
1537 xfs_ilock(ip, XFS_ILOCK_EXCL);
1538
1539 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
1540 xfs_trans_ihold(tp, ip);
1541 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1542 error = xfs_trans_commit(tp, 0, NULL);
1543 xfs_iunlock(ip, XFS_ILOCK_EXCL);
1544 xfs_log_force(mp, (xfs_lsn_t)0, log_flags);
1545 }
1546
1547 /*
1548 * When shutting down, we need to insure that the AIL is pushed
1549 * to disk or the filesystem can appear corrupt from the PROM.
1550 */
1551 if ((flags & (SYNC_CLOSE|SYNC_WAIT)) == (SYNC_CLOSE|SYNC_WAIT)) {
1552 XFS_bflush(mp->m_ddev_targp);
1553 if (mp->m_rtdev_targp) {
1554 XFS_bflush(mp->m_rtdev_targp);
1555 }
1556 }
1557
1558 return XFS_ERROR(last_error);
1559 }
1560
1561 /*
1562 * xfs_vget - called by DMAPI and NFSD to get vnode from file handle
1563 */
1564 STATIC int
1565 xfs_vget(
1566 bhv_desc_t *bdp,
1567 bhv_vnode_t **vpp,
1568 fid_t *fidp)
1569 {
1570 xfs_mount_t *mp = XFS_BHVTOM(bdp);
1571 xfs_fid_t *xfid = (struct xfs_fid *)fidp;
1572 xfs_inode_t *ip;
1573 int error;
1574 xfs_ino_t ino;
1575 unsigned int igen;
1576
1577 /*
1578 * Invalid. Since handles can be created in user space and passed in
1579 * via gethandle(), this is not cause for a panic.
1580 */
1581 if (xfid->xfs_fid_len != sizeof(*xfid) - sizeof(xfid->xfs_fid_len))
1582 return XFS_ERROR(EINVAL);
1583
1584 ino = xfid->xfs_fid_ino;
1585 igen = xfid->xfs_fid_gen;
1586
1587 /*
1588 * NFS can sometimes send requests for ino 0. Fail them gracefully.
1589 */
1590 if (ino == 0)
1591 return XFS_ERROR(ESTALE);
1592
1593 error = xfs_iget(mp, NULL, ino, 0, XFS_ILOCK_SHARED, &ip, 0);
1594 if (error) {
1595 *vpp = NULL;
1596 return error;
1597 }
1598
1599 if (ip == NULL) {
1600 *vpp = NULL;
1601 return XFS_ERROR(EIO);
1602 }
1603
1604 if (ip->i_d.di_mode == 0 || ip->i_d.di_gen != igen) {
1605 xfs_iput_new(ip, XFS_ILOCK_SHARED);
1606 *vpp = NULL;
1607 return XFS_ERROR(ENOENT);
1608 }
1609
1610 *vpp = XFS_ITOV(ip);
1611 xfs_iunlock(ip, XFS_ILOCK_SHARED);
1612 return 0;
1613 }
1614
1615
1616 #define MNTOPT_LOGBUFS "logbufs" /* number of XFS log buffers */
1617 #define MNTOPT_LOGBSIZE "logbsize" /* size of XFS log buffers */
1618 #define MNTOPT_LOGDEV "logdev" /* log device */
1619 #define MNTOPT_RTDEV "rtdev" /* realtime I/O device */
1620 #define MNTOPT_BIOSIZE "biosize" /* log2 of preferred buffered io size */
1621 #define MNTOPT_WSYNC "wsync" /* safe-mode nfs compatible mount */
1622 #define MNTOPT_INO64 "ino64" /* force inodes into 64-bit range */
1623 #define MNTOPT_NOALIGN "noalign" /* turn off stripe alignment */
1624 #define MNTOPT_SWALLOC "swalloc" /* turn on stripe width allocation */
1625 #define MNTOPT_SUNIT "sunit" /* data volume stripe unit */
1626 #define MNTOPT_SWIDTH "swidth" /* data volume stripe width */
1627 #define MNTOPT_NOUUID "nouuid" /* ignore filesystem UUID */
1628 #define MNTOPT_MTPT "mtpt" /* filesystem mount point */
1629 #define MNTOPT_GRPID "grpid" /* group-ID from parent directory */
1630 #define MNTOPT_NOGRPID "nogrpid" /* group-ID from current process */
1631 #define MNTOPT_BSDGROUPS "bsdgroups" /* group-ID from parent directory */
1632 #define MNTOPT_SYSVGROUPS "sysvgroups" /* group-ID from current process */
1633 #define MNTOPT_ALLOCSIZE "allocsize" /* preferred allocation size */
1634 #define MNTOPT_IHASHSIZE "ihashsize" /* size of inode hash table */
1635 #define MNTOPT_NORECOVERY "norecovery" /* don't run XFS recovery */
1636 #define MNTOPT_BARRIER "barrier" /* use writer barriers for log write and
1637 * unwritten extent conversion */
1638 #define MNTOPT_NOBARRIER "nobarrier" /* .. disable */
1639 #define MNTOPT_OSYNCISOSYNC "osyncisosync" /* o_sync is REALLY o_sync */
1640 #define MNTOPT_64BITINODE "inode64" /* inodes can be allocated anywhere */
1641 #define MNTOPT_IKEEP "ikeep" /* do not free empty inode clusters */
1642 #define MNTOPT_NOIKEEP "noikeep" /* free empty inode clusters */
1643 #define MNTOPT_LARGEIO "largeio" /* report large I/O sizes in stat() */
1644 #define MNTOPT_NOLARGEIO "nolargeio" /* do not report large I/O sizes
1645 * in stat(). */
1646 #define MNTOPT_ATTR2 "attr2" /* do use attr2 attribute format */
1647 #define MNTOPT_NOATTR2 "noattr2" /* do not use attr2 attribute format */
1648
1649 STATIC unsigned long
1650 suffix_strtoul(char *s, char **endp, unsigned int base)
1651 {
1652 int last, shift_left_factor = 0;
1653 char *value = s;
1654
1655 last = strlen(value) - 1;
1656 if (value[last] == 'K' || value[last] == 'k') {
1657 shift_left_factor = 10;
1658 value[last] = '\0';
1659 }
1660 if (value[last] == 'M' || value[last] == 'm') {
1661 shift_left_factor = 20;
1662 value[last] = '\0';
1663 }
1664 if (value[last] == 'G' || value[last] == 'g') {
1665 shift_left_factor = 30;
1666 value[last] = '\0';
1667 }
1668
1669 return simple_strtoul((const char *)s, endp, base) << shift_left_factor;
1670 }
1671
1672 STATIC int
1673 xfs_parseargs(
1674 struct bhv_desc *bhv,
1675 char *options,
1676 struct xfs_mount_args *args,
1677 int update)
1678 {
1679 bhv_vfs_t *vfsp = bhvtovfs(bhv);
1680 char *this_char, *value, *eov;
1681 int dsunit, dswidth, vol_dsunit, vol_dswidth;
1682 int iosize;
1683
1684 args->flags |= XFSMNT_IDELETE;
1685 args->flags |= XFSMNT_BARRIER;
1686 args->flags2 |= XFSMNT2_COMPAT_IOSIZE;
1687
1688 if (!options)
1689 goto done;
1690
1691 iosize = dsunit = dswidth = vol_dsunit = vol_dswidth = 0;
1692
1693 while ((this_char = strsep(&options, ",")) != NULL) {
1694 if (!*this_char)
1695 continue;
1696 if ((value = strchr(this_char, '=')) != NULL)
1697 *value++ = 0;
1698
1699 if (!strcmp(this_char, MNTOPT_LOGBUFS)) {
1700 if (!value || !*value) {
1701 cmn_err(CE_WARN,
1702 "XFS: %s option requires an argument",
1703 this_char);
1704 return EINVAL;
1705 }
1706 args->logbufs = simple_strtoul(value, &eov, 10);
1707 } else if (!strcmp(this_char, MNTOPT_LOGBSIZE)) {
1708 if (!value || !*value) {
1709 cmn_err(CE_WARN,
1710 "XFS: %s option requires an argument",
1711 this_char);
1712 return EINVAL;
1713 }
1714 args->logbufsize = suffix_strtoul(value, &eov, 10);
1715 } else if (!strcmp(this_char, MNTOPT_LOGDEV)) {
1716 if (!value || !*value) {
1717 cmn_err(CE_WARN,
1718 "XFS: %s option requires an argument",
1719 this_char);
1720 return EINVAL;
1721 }
1722 strncpy(args->logname, value, MAXNAMELEN);
1723 } else if (!strcmp(this_char, MNTOPT_MTPT)) {
1724 if (!value || !*value) {
1725 cmn_err(CE_WARN,
1726 "XFS: %s option requires an argument",
1727 this_char);
1728 return EINVAL;
1729 }
1730 strncpy(args->mtpt, value, MAXNAMELEN);
1731 } else if (!strcmp(this_char, MNTOPT_RTDEV)) {
1732 if (!value || !*value) {
1733 cmn_err(CE_WARN,
1734 "XFS: %s option requires an argument",
1735 this_char);
1736 return EINVAL;
1737 }
1738 strncpy(args->rtname, value, MAXNAMELEN);
1739 } else if (!strcmp(this_char, MNTOPT_BIOSIZE)) {
1740 if (!value || !*value) {
1741 cmn_err(CE_WARN,
1742 "XFS: %s option requires an argument",
1743 this_char);
1744 return EINVAL;
1745 }
1746 iosize = simple_strtoul(value, &eov, 10);
1747 args->flags |= XFSMNT_IOSIZE;
1748 args->iosizelog = (uint8_t) iosize;
1749 } else if (!strcmp(this_char, MNTOPT_ALLOCSIZE)) {
1750 if (!value || !*value) {
1751 cmn_err(CE_WARN,
1752 "XFS: %s option requires an argument",
1753 this_char);
1754 return EINVAL;
1755 }
1756 iosize = suffix_strtoul(value, &eov, 10);
1757 args->flags |= XFSMNT_IOSIZE;
1758 args->iosizelog = ffs(iosize) - 1;
1759 } else if (!strcmp(this_char, MNTOPT_IHASHSIZE)) {
1760 if (!value || !*value) {
1761 cmn_err(CE_WARN,
1762 "XFS: %s option requires an argument",
1763 this_char);
1764 return EINVAL;
1765 }
1766 args->flags |= XFSMNT_IHASHSIZE;
1767 args->ihashsize = simple_strtoul(value, &eov, 10);
1768 } else if (!strcmp(this_char, MNTOPT_GRPID) ||
1769 !strcmp(this_char, MNTOPT_BSDGROUPS)) {
1770 vfsp->vfs_flag |= VFS_GRPID;
1771 } else if (!strcmp(this_char, MNTOPT_NOGRPID) ||
1772 !strcmp(this_char, MNTOPT_SYSVGROUPS)) {
1773 vfsp->vfs_flag &= ~VFS_GRPID;
1774 } else if (!strcmp(this_char, MNTOPT_WSYNC)) {
1775 args->flags |= XFSMNT_WSYNC;
1776 } else if (!strcmp(this_char, MNTOPT_OSYNCISOSYNC)) {
1777 args->flags |= XFSMNT_OSYNCISOSYNC;
1778 } else if (!strcmp(this_char, MNTOPT_NORECOVERY)) {
1779 args->flags |= XFSMNT_NORECOVERY;
1780 } else if (!strcmp(this_char, MNTOPT_INO64)) {
1781 args->flags |= XFSMNT_INO64;
1782 #if !XFS_BIG_INUMS
1783 cmn_err(CE_WARN,
1784 "XFS: %s option not allowed on this system",
1785 this_char);
1786 return EINVAL;
1787 #endif
1788 } else if (!strcmp(this_char, MNTOPT_NOALIGN)) {
1789 args->flags |= XFSMNT_NOALIGN;
1790 } else if (!strcmp(this_char, MNTOPT_SWALLOC)) {
1791 args->flags |= XFSMNT_SWALLOC;
1792 } else if (!strcmp(this_char, MNTOPT_SUNIT)) {
1793 if (!value || !*value) {
1794 cmn_err(CE_WARN,
1795 "XFS: %s option requires an argument",
1796 this_char);
1797 return EINVAL;
1798 }
1799 dsunit = simple_strtoul(value, &eov, 10);
1800 } else if (!strcmp(this_char, MNTOPT_SWIDTH)) {
1801 if (!value || !*value) {
1802 cmn_err(CE_WARN,
1803 "XFS: %s option requires an argument",
1804 this_char);
1805 return EINVAL;
1806 }
1807 dswidth = simple_strtoul(value, &eov, 10);
1808 } else if (!strcmp(this_char, MNTOPT_64BITINODE)) {
1809 args->flags &= ~XFSMNT_32BITINODES;
1810 #if !XFS_BIG_INUMS
1811 cmn_err(CE_WARN,
1812 "XFS: %s option not allowed on this system",
1813 this_char);
1814 return EINVAL;
1815 #endif
1816 } else if (!strcmp(this_char, MNTOPT_NOUUID)) {
1817 args->flags |= XFSMNT_NOUUID;
1818 } else if (!strcmp(this_char, MNTOPT_BARRIER)) {
1819 args->flags |= XFSMNT_BARRIER;
1820 } else if (!strcmp(this_char, MNTOPT_NOBARRIER)) {
1821 args->flags &= ~XFSMNT_BARRIER;
1822 } else if (!strcmp(this_char, MNTOPT_IKEEP)) {
1823 args->flags &= ~XFSMNT_IDELETE;
1824 } else if (!strcmp(this_char, MNTOPT_NOIKEEP)) {
1825 args->flags |= XFSMNT_IDELETE;
1826 } else if (!strcmp(this_char, MNTOPT_LARGEIO)) {
1827 args->flags2 &= ~XFSMNT2_COMPAT_IOSIZE;
1828 } else if (!strcmp(this_char, MNTOPT_NOLARGEIO)) {
1829 args->flags2 |= XFSMNT2_COMPAT_IOSIZE;
1830 } else if (!strcmp(this_char, MNTOPT_ATTR2)) {
1831 args->flags |= XFSMNT_ATTR2;
1832 } else if (!strcmp(this_char, MNTOPT_NOATTR2)) {
1833 args->flags &= ~XFSMNT_ATTR2;
1834 } else if (!strcmp(this_char, "osyncisdsync")) {
1835 /* no-op, this is now the default */
1836 cmn_err(CE_WARN,
1837 "XFS: osyncisdsync is now the default, option is deprecated.");
1838 } else if (!strcmp(this_char, "irixsgid")) {
1839 cmn_err(CE_WARN,
1840 "XFS: irixsgid is now a sysctl(2) variable, option is deprecated.");
1841 } else {
1842 cmn_err(CE_WARN,
1843 "XFS: unknown mount option [%s].", this_char);
1844 return EINVAL;
1845 }
1846 }
1847
1848 if (args->flags & XFSMNT_NORECOVERY) {
1849 if ((vfsp->vfs_flag & VFS_RDONLY) == 0) {
1850 cmn_err(CE_WARN,
1851 "XFS: no-recovery mounts must be read-only.");
1852 return EINVAL;
1853 }
1854 }
1855
1856 if ((args->flags & XFSMNT_NOALIGN) && (dsunit || dswidth)) {
1857 cmn_err(CE_WARN,
1858 "XFS: sunit and swidth options incompatible with the noalign option");
1859 return EINVAL;
1860 }
1861
1862 if ((dsunit && !dswidth) || (!dsunit && dswidth)) {
1863 cmn_err(CE_WARN,
1864 "XFS: sunit and swidth must be specified together");
1865 return EINVAL;
1866 }
1867
1868 if (dsunit && (dswidth % dsunit != 0)) {
1869 cmn_err(CE_WARN,
1870 "XFS: stripe width (%d) must be a multiple of the stripe unit (%d)",
1871 dswidth, dsunit);
1872 return EINVAL;
1873 }
1874
1875 if ((args->flags & XFSMNT_NOALIGN) != XFSMNT_NOALIGN) {
1876 if (dsunit) {
1877 args->sunit = dsunit;
1878 args->flags |= XFSMNT_RETERR;
1879 } else {
1880 args->sunit = vol_dsunit;
1881 }
1882 dswidth ? (args->swidth = dswidth) :
1883 (args->swidth = vol_dswidth);
1884 } else {
1885 args->sunit = args->swidth = 0;
1886 }
1887
1888 done:
1889 if (args->flags & XFSMNT_32BITINODES)
1890 vfsp->vfs_flag |= VFS_32BITINODES;
1891 if (args->flags2)
1892 args->flags |= XFSMNT_FLAGS2;
1893 return 0;
1894 }
1895
1896 STATIC int
1897 xfs_showargs(
1898 struct bhv_desc *bhv,
1899 struct seq_file *m)
1900 {
1901 static struct proc_xfs_info {
1902 int flag;
1903 char *str;
1904 } xfs_info[] = {
1905 /* the few simple ones we can get from the mount struct */
1906 { XFS_MOUNT_WSYNC, "," MNTOPT_WSYNC },
1907 { XFS_MOUNT_INO64, "," MNTOPT_INO64 },
1908 { XFS_MOUNT_NOALIGN, "," MNTOPT_NOALIGN },
1909 { XFS_MOUNT_SWALLOC, "," MNTOPT_SWALLOC },
1910 { XFS_MOUNT_NOUUID, "," MNTOPT_NOUUID },
1911 { XFS_MOUNT_NORECOVERY, "," MNTOPT_NORECOVERY },
1912 { XFS_MOUNT_OSYNCISOSYNC, "," MNTOPT_OSYNCISOSYNC },
1913 { 0, NULL }
1914 };
1915 struct proc_xfs_info *xfs_infop;
1916 struct xfs_mount *mp = XFS_BHVTOM(bhv);
1917 struct bhv_vfs *vfsp = XFS_MTOVFS(mp);
1918
1919 for (xfs_infop = xfs_info; xfs_infop->flag; xfs_infop++) {
1920 if (mp->m_flags & xfs_infop->flag)
1921 seq_puts(m, xfs_infop->str);
1922 }
1923
1924 if (mp->m_flags & XFS_MOUNT_IHASHSIZE)
1925 seq_printf(m, "," MNTOPT_IHASHSIZE "=%d", (int)mp->m_ihsize);
1926
1927 if (mp->m_flags & XFS_MOUNT_DFLT_IOSIZE)
1928 seq_printf(m, "," MNTOPT_ALLOCSIZE "=%dk",
1929 (int)(1 << mp->m_writeio_log) >> 10);
1930
1931 if (mp->m_logbufs > 0)
1932 seq_printf(m, "," MNTOPT_LOGBUFS "=%d", mp->m_logbufs);
1933 if (mp->m_logbsize > 0)
1934 seq_printf(m, "," MNTOPT_LOGBSIZE "=%dk", mp->m_logbsize >> 10);
1935
1936 if (mp->m_logname)
1937 seq_printf(m, "," MNTOPT_LOGDEV "=%s", mp->m_logname);
1938 if (mp->m_rtname)
1939 seq_printf(m, "," MNTOPT_RTDEV "=%s", mp->m_rtname);
1940
1941 if (mp->m_dalign > 0)
1942 seq_printf(m, "," MNTOPT_SUNIT "=%d",
1943 (int)XFS_FSB_TO_BB(mp, mp->m_dalign));
1944 if (mp->m_swidth > 0)
1945 seq_printf(m, "," MNTOPT_SWIDTH "=%d",
1946 (int)XFS_FSB_TO_BB(mp, mp->m_swidth));
1947
1948 if (!(mp->m_flags & XFS_MOUNT_IDELETE))
1949 seq_printf(m, "," MNTOPT_IKEEP);
1950 if (!(mp->m_flags & XFS_MOUNT_COMPAT_IOSIZE))
1951 seq_printf(m, "," MNTOPT_LARGEIO);
1952
1953 if (!(vfsp->vfs_flag & VFS_32BITINODES))
1954 seq_printf(m, "," MNTOPT_64BITINODE);
1955 if (vfsp->vfs_flag & VFS_GRPID)
1956 seq_printf(m, "," MNTOPT_GRPID);
1957
1958 return 0;
1959 }
1960
1961 /*
1962 * Second stage of a freeze. The data is already frozen, now we have to take
1963 * care of the metadata. New transactions are already blocked, so we need to
1964 * wait for any remaining transactions to drain out before proceding.
1965 */
1966 STATIC void
1967 xfs_freeze(
1968 bhv_desc_t *bdp)
1969 {
1970 xfs_mount_t *mp = XFS_BHVTOM(bdp);
1971
1972 /* wait for all modifications to complete */
1973 while (atomic_read(&mp->m_active_trans) > 0)
1974 delay(100);
1975
1976 /* flush inodes and push all remaining buffers out to disk */
1977 xfs_quiesce_fs(mp);
1978
1979 ASSERT_ALWAYS(atomic_read(&mp->m_active_trans) == 0);
1980
1981 /* Push the superblock and write an unmount record */
1982 xfs_log_unmount_write(mp);
1983 xfs_unmountfs_writesb(mp);
1984 xfs_fs_log_dummy(mp);
1985 }
1986
1987
1988 bhv_vfsops_t xfs_vfsops = {
1989 BHV_IDENTITY_INIT(VFS_BHV_XFS,VFS_POSITION_XFS),
1990 .vfs_parseargs = xfs_parseargs,
1991 .vfs_showargs = xfs_showargs,
1992 .vfs_mount = xfs_mount,
1993 .vfs_unmount = xfs_unmount,
1994 .vfs_mntupdate = xfs_mntupdate,
1995 .vfs_root = xfs_root,
1996 .vfs_statvfs = xfs_statvfs,
1997 .vfs_sync = xfs_sync,
1998 .vfs_vget = xfs_vget,
1999 .vfs_dmapiops = (vfs_dmapiops_t)fs_nosys,
2000 .vfs_quotactl = (vfs_quotactl_t)fs_nosys,
2001 .vfs_init_vnode = xfs_initialize_vnode,
2002 .vfs_force_shutdown = xfs_do_force_shutdown,
2003 .vfs_freeze = xfs_freeze,
2004 };
kmemtrace - Kernel memory tracer