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[XFS] Fix a potential NULL pointer deref in XFS on failed mount.
[linux-2.6/verdex.git] / fs / xfs / xfs_vfsops.c
blobba8f7a3e40281709690456c6a756b9ee2dc7c8db
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_mru_cache.h"
55 #include "xfs_filestream.h"
56 #include "xfs_fsops.h"
57
58 STATIC int xfs_sync(bhv_desc_t *, int, cred_t *);
59
60 int
61 xfs_init(void)
62 {
63 extern kmem_zone_t *xfs_bmap_free_item_zone;
64 extern kmem_zone_t *xfs_btree_cur_zone;
65 extern kmem_zone_t *xfs_trans_zone;
66 extern kmem_zone_t *xfs_buf_item_zone;
67 extern kmem_zone_t *xfs_dabuf_zone;
68 #ifdef XFS_DABUF_DEBUG
69 extern lock_t xfs_dabuf_global_lock;
70 spinlock_init(&xfs_dabuf_global_lock, "xfsda");
71 #endif
72
73 /*
74 * Initialize all of the zone allocators we use.
75 */
76 xfs_bmap_free_item_zone = kmem_zone_init(sizeof(xfs_bmap_free_item_t),
77 "xfs_bmap_free_item");
78 xfs_btree_cur_zone = kmem_zone_init(sizeof(xfs_btree_cur_t),
79 "xfs_btree_cur");
80 xfs_trans_zone = kmem_zone_init(sizeof(xfs_trans_t), "xfs_trans");
81 xfs_da_state_zone =
82 kmem_zone_init(sizeof(xfs_da_state_t), "xfs_da_state");
83 xfs_dabuf_zone = kmem_zone_init(sizeof(xfs_dabuf_t), "xfs_dabuf");
84 xfs_ifork_zone = kmem_zone_init(sizeof(xfs_ifork_t), "xfs_ifork");
85 xfs_acl_zone_init(xfs_acl_zone, "xfs_acl");
86 xfs_mru_cache_init();
87 xfs_filestream_init();
88
89 /*
90 * The size of the zone allocated buf log item is the maximum
91 * size possible under XFS. This wastes a little bit of memory,
92 * but it is much faster.
93 */
94 xfs_buf_item_zone =
95 kmem_zone_init((sizeof(xfs_buf_log_item_t) +
96 (((XFS_MAX_BLOCKSIZE / XFS_BLI_CHUNK) /
97 NBWORD) * sizeof(int))),
98 "xfs_buf_item");
99 xfs_efd_zone =
100 kmem_zone_init((sizeof(xfs_efd_log_item_t) +
101 ((XFS_EFD_MAX_FAST_EXTENTS - 1) *
102 sizeof(xfs_extent_t))),
103 "xfs_efd_item");
104 xfs_efi_zone =
105 kmem_zone_init((sizeof(xfs_efi_log_item_t) +
106 ((XFS_EFI_MAX_FAST_EXTENTS - 1) *
107 sizeof(xfs_extent_t))),
108 "xfs_efi_item");
109
110 /*
111 * These zones warrant special memory allocator hints
112 */
113 xfs_inode_zone =
114 kmem_zone_init_flags(sizeof(xfs_inode_t), "xfs_inode",
115 KM_ZONE_HWALIGN | KM_ZONE_RECLAIM |
116 KM_ZONE_SPREAD, NULL);
117 xfs_ili_zone =
118 kmem_zone_init_flags(sizeof(xfs_inode_log_item_t), "xfs_ili",
119 KM_ZONE_SPREAD, NULL);
120 xfs_chashlist_zone =
121 kmem_zone_init_flags(sizeof(xfs_chashlist_t), "xfs_chashlist",
122 KM_ZONE_SPREAD, NULL);
123
124 /*
125 * Allocate global trace buffers.
126 */
127 #ifdef XFS_ALLOC_TRACE
128 xfs_alloc_trace_buf = ktrace_alloc(XFS_ALLOC_TRACE_SIZE, KM_SLEEP);
129 #endif
130 #ifdef XFS_BMAP_TRACE
131 xfs_bmap_trace_buf = ktrace_alloc(XFS_BMAP_TRACE_SIZE, KM_SLEEP);
132 #endif
133 #ifdef XFS_BMBT_TRACE
134 xfs_bmbt_trace_buf = ktrace_alloc(XFS_BMBT_TRACE_SIZE, KM_SLEEP);
135 #endif
136 #ifdef XFS_ATTR_TRACE
137 xfs_attr_trace_buf = ktrace_alloc(XFS_ATTR_TRACE_SIZE, KM_SLEEP);
138 #endif
139 #ifdef XFS_DIR2_TRACE
140 xfs_dir2_trace_buf = ktrace_alloc(XFS_DIR2_GTRACE_SIZE, KM_SLEEP);
141 #endif
142
143 xfs_dir_startup();
144
145 #if (defined(DEBUG) || defined(INDUCE_IO_ERROR))
146 xfs_error_test_init();
147 #endif /* DEBUG || INDUCE_IO_ERROR */
148
149 xfs_init_procfs();
150 xfs_sysctl_register();
151 return 0;
152 }
153
154 void
155 xfs_cleanup(void)
156 {
157 extern kmem_zone_t *xfs_bmap_free_item_zone;
158 extern kmem_zone_t *xfs_btree_cur_zone;
159 extern kmem_zone_t *xfs_inode_zone;
160 extern kmem_zone_t *xfs_trans_zone;
161 extern kmem_zone_t *xfs_da_state_zone;
162 extern kmem_zone_t *xfs_dabuf_zone;
163 extern kmem_zone_t *xfs_efd_zone;
164 extern kmem_zone_t *xfs_efi_zone;
165 extern kmem_zone_t *xfs_buf_item_zone;
166 extern kmem_zone_t *xfs_chashlist_zone;
167
168 xfs_cleanup_procfs();
169 xfs_sysctl_unregister();
170 xfs_refcache_destroy();
171 xfs_filestream_uninit();
172 xfs_mru_cache_uninit();
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_BMBT_TRACE
182 ktrace_free(xfs_bmbt_trace_buf);
183 #endif
184 #ifdef XFS_BMAP_TRACE
185 ktrace_free(xfs_bmap_trace_buf);
186 #endif
187 #ifdef XFS_ALLOC_TRACE
188 ktrace_free(xfs_alloc_trace_buf);
189 #endif
190
191 kmem_zone_destroy(xfs_bmap_free_item_zone);
192 kmem_zone_destroy(xfs_btree_cur_zone);
193 kmem_zone_destroy(xfs_inode_zone);
194 kmem_zone_destroy(xfs_trans_zone);
195 kmem_zone_destroy(xfs_da_state_zone);
196 kmem_zone_destroy(xfs_dabuf_zone);
197 kmem_zone_destroy(xfs_buf_item_zone);
198 kmem_zone_destroy(xfs_efd_zone);
199 kmem_zone_destroy(xfs_efi_zone);
200 kmem_zone_destroy(xfs_ifork_zone);
201 kmem_zone_destroy(xfs_ili_zone);
202 kmem_zone_destroy(xfs_chashlist_zone);
203 }
204
205 /*
206 * xfs_start_flags
207 *
208 * This function fills in xfs_mount_t fields based on mount args.
209 * Note: the superblock has _not_ yet been read in.
210 */
211 STATIC int
212 xfs_start_flags(
213 struct bhv_vfs *vfs,
214 struct xfs_mount_args *ap,
215 struct xfs_mount *mp)
216 {
217 /* Values are in BBs */
218 if ((ap->flags & XFSMNT_NOALIGN) != XFSMNT_NOALIGN) {
219 /*
220 * At this point the superblock has not been read
221 * in, therefore we do not know the block size.
222 * Before the mount call ends we will convert
223 * these to FSBs.
224 */
225 mp->m_dalign = ap->sunit;
226 mp->m_swidth = ap->swidth;
227 }
228
229 if (ap->logbufs != -1 &&
230 ap->logbufs != 0 &&
231 (ap->logbufs < XLOG_MIN_ICLOGS ||
232 ap->logbufs > XLOG_MAX_ICLOGS)) {
233 cmn_err(CE_WARN,
234 "XFS: invalid logbufs value: %d [not %d-%d]",
235 ap->logbufs, XLOG_MIN_ICLOGS, XLOG_MAX_ICLOGS);
236 return XFS_ERROR(EINVAL);
237 }
238 mp->m_logbufs = ap->logbufs;
239 if (ap->logbufsize != -1 &&
240 ap->logbufsize != 0 &&
241 (ap->logbufsize < XLOG_MIN_RECORD_BSIZE ||
242 ap->logbufsize > XLOG_MAX_RECORD_BSIZE ||
243 !is_power_of_2(ap->logbufsize))) {
244 cmn_err(CE_WARN,
245 "XFS: invalid logbufsize: %d [not 16k,32k,64k,128k or 256k]",
246 ap->logbufsize);
247 return XFS_ERROR(EINVAL);
248 }
249 mp->m_ihsize = ap->ihashsize;
250 mp->m_logbsize = ap->logbufsize;
251 mp->m_fsname_len = strlen(ap->fsname) + 1;
252 mp->m_fsname = kmem_alloc(mp->m_fsname_len, KM_SLEEP);
253 strcpy(mp->m_fsname, ap->fsname);
254 if (ap->rtname[0]) {
255 mp->m_rtname = kmem_alloc(strlen(ap->rtname) + 1, KM_SLEEP);
256 strcpy(mp->m_rtname, ap->rtname);
257 }
258 if (ap->logname[0]) {
259 mp->m_logname = kmem_alloc(strlen(ap->logname) + 1, KM_SLEEP);
260 strcpy(mp->m_logname, ap->logname);
261 }
262
263 if (ap->flags & XFSMNT_WSYNC)
264 mp->m_flags |= XFS_MOUNT_WSYNC;
265 #if XFS_BIG_INUMS
266 if (ap->flags & XFSMNT_INO64) {
267 mp->m_flags |= XFS_MOUNT_INO64;
268 mp->m_inoadd = XFS_INO64_OFFSET;
269 }
270 #endif
271 if (ap->flags & XFSMNT_RETERR)
272 mp->m_flags |= XFS_MOUNT_RETERR;
273 if (ap->flags & XFSMNT_NOALIGN)
274 mp->m_flags |= XFS_MOUNT_NOALIGN;
275 if (ap->flags & XFSMNT_SWALLOC)
276 mp->m_flags |= XFS_MOUNT_SWALLOC;
277 if (ap->flags & XFSMNT_OSYNCISOSYNC)
278 mp->m_flags |= XFS_MOUNT_OSYNCISOSYNC;
279 if (ap->flags & XFSMNT_32BITINODES)
280 mp->m_flags |= XFS_MOUNT_32BITINODES;
281
282 if (ap->flags & XFSMNT_IOSIZE) {
283 if (ap->iosizelog > XFS_MAX_IO_LOG ||
284 ap->iosizelog < XFS_MIN_IO_LOG) {
285 cmn_err(CE_WARN,
286 "XFS: invalid log iosize: %d [not %d-%d]",
287 ap->iosizelog, XFS_MIN_IO_LOG,
288 XFS_MAX_IO_LOG);
289 return XFS_ERROR(EINVAL);
290 }
291
292 mp->m_flags |= XFS_MOUNT_DFLT_IOSIZE;
293 mp->m_readio_log = mp->m_writeio_log = ap->iosizelog;
294 }
295
296 if (ap->flags & XFSMNT_IHASHSIZE)
297 mp->m_flags |= XFS_MOUNT_IHASHSIZE;
298 if (ap->flags & XFSMNT_IDELETE)
299 mp->m_flags |= XFS_MOUNT_IDELETE;
300 if (ap->flags & XFSMNT_DIRSYNC)
301 mp->m_flags |= XFS_MOUNT_DIRSYNC;
302 if (ap->flags & XFSMNT_ATTR2)
303 mp->m_flags |= XFS_MOUNT_ATTR2;
304
305 if (ap->flags2 & XFSMNT2_COMPAT_IOSIZE)
306 mp->m_flags |= XFS_MOUNT_COMPAT_IOSIZE;
307
308 /*
309 * no recovery flag requires a read-only mount
310 */
311 if (ap->flags & XFSMNT_NORECOVERY) {
312 if (!(vfs->vfs_flag & VFS_RDONLY)) {
313 cmn_err(CE_WARN,
314 "XFS: tried to mount a FS read-write without recovery!");
315 return XFS_ERROR(EINVAL);
316 }
317 mp->m_flags |= XFS_MOUNT_NORECOVERY;
318 }
319
320 if (ap->flags & XFSMNT_NOUUID)
321 mp->m_flags |= XFS_MOUNT_NOUUID;
322 if (ap->flags & XFSMNT_BARRIER)
323 mp->m_flags |= XFS_MOUNT_BARRIER;
324 else
325 mp->m_flags &= ~XFS_MOUNT_BARRIER;
326
327 if (ap->flags2 & XFSMNT2_FILESTREAMS)
328 mp->m_flags |= XFS_MOUNT_FILESTREAMS;
329
330 return 0;
331 }
332
333 /*
334 * This function fills in xfs_mount_t fields based on mount args.
335 * Note: the superblock _has_ now been read in.
336 */
337 STATIC int
338 xfs_finish_flags(
339 struct bhv_vfs *vfs,
340 struct xfs_mount_args *ap,
341 struct xfs_mount *mp)
342 {
343 int ronly = (vfs->vfs_flag & VFS_RDONLY);
344
345 /* Fail a mount where the logbuf is smaller then the log stripe */
346 if (XFS_SB_VERSION_HASLOGV2(&mp->m_sb)) {
347 if ((ap->logbufsize <= 0) &&
348 (mp->m_sb.sb_logsunit > XLOG_BIG_RECORD_BSIZE)) {
349 mp->m_logbsize = mp->m_sb.sb_logsunit;
350 } else if (ap->logbufsize > 0 &&
351 ap->logbufsize < mp->m_sb.sb_logsunit) {
352 cmn_err(CE_WARN,
353 "XFS: logbuf size must be greater than or equal to log stripe size");
354 return XFS_ERROR(EINVAL);
355 }
356 } else {
357 /* Fail a mount if the logbuf is larger than 32K */
358 if (ap->logbufsize > XLOG_BIG_RECORD_BSIZE) {
359 cmn_err(CE_WARN,
360 "XFS: logbuf size for version 1 logs must be 16K or 32K");
361 return XFS_ERROR(EINVAL);
362 }
363 }
364
365 if (XFS_SB_VERSION_HASATTR2(&mp->m_sb)) {
366 mp->m_flags |= XFS_MOUNT_ATTR2;
367 }
368
369 /*
370 * prohibit r/w mounts of read-only filesystems
371 */
372 if ((mp->m_sb.sb_flags & XFS_SBF_READONLY) && !ronly) {
373 cmn_err(CE_WARN,
374 "XFS: cannot mount a read-only filesystem as read-write");
375 return XFS_ERROR(EROFS);
376 }
377
378 /*
379 * check for shared mount.
380 */
381 if (ap->flags & XFSMNT_SHARED) {
382 if (!XFS_SB_VERSION_HASSHARED(&mp->m_sb))
383 return XFS_ERROR(EINVAL);
384
385 /*
386 * For IRIX 6.5, shared mounts must have the shared
387 * version bit set, have the persistent readonly
388 * field set, must be version 0 and can only be mounted
389 * read-only.
390 */
391 if (!ronly || !(mp->m_sb.sb_flags & XFS_SBF_READONLY) ||
392 (mp->m_sb.sb_shared_vn != 0))
393 return XFS_ERROR(EINVAL);
394
395 mp->m_flags |= XFS_MOUNT_SHARED;
396
397 /*
398 * Shared XFS V0 can't deal with DMI. Return EINVAL.
399 */
400 if (mp->m_sb.sb_shared_vn == 0 && (ap->flags & XFSMNT_DMAPI))
401 return XFS_ERROR(EINVAL);
402 }
403
404 return 0;
405 }
406
407 /*
408 * xfs_mount
409 *
410 * The file system configurations are:
411 * (1) device (partition) with data and internal log
412 * (2) logical volume with data and log subvolumes.
413 * (3) logical volume with data, log, and realtime subvolumes.
414 *
415 * We only have to handle opening the log and realtime volumes here if
416 * they are present. The data subvolume has already been opened by
417 * get_sb_bdev() and is stored in vfsp->vfs_super->s_bdev.
418 */
419 STATIC int
420 xfs_mount(
421 struct bhv_desc *bhvp,
422 struct xfs_mount_args *args,
423 cred_t *credp)
424 {
425 struct bhv_vfs *vfsp = bhvtovfs(bhvp);
426 struct bhv_desc *p;
427 struct xfs_mount *mp = XFS_BHVTOM(bhvp);
428 struct block_device *ddev, *logdev, *rtdev;
429 int flags = 0, error;
430
431 ddev = vfsp->vfs_super->s_bdev;
432 logdev = rtdev = NULL;
433
434 /*
435 * Setup xfs_mount function vectors from available behaviors
436 */
437 p = vfs_bhv_lookup(vfsp, VFS_POSITION_DM);
438 mp->m_dm_ops = p ? *(xfs_dmops_t *) vfs_bhv_custom(p) : xfs_dmcore_stub;
439 p = vfs_bhv_lookup(vfsp, VFS_POSITION_QM);
440 mp->m_qm_ops = p ? *(xfs_qmops_t *) vfs_bhv_custom(p) : xfs_qmcore_stub;
441 p = vfs_bhv_lookup(vfsp, VFS_POSITION_IO);
442 mp->m_io_ops = p ? *(xfs_ioops_t *) vfs_bhv_custom(p) : xfs_iocore_xfs;
443
444 if (args->flags & XFSMNT_QUIET)
445 flags |= XFS_MFSI_QUIET;
446
447 /*
448 * Open real time and log devices - order is important.
449 */
450 if (args->logname[0]) {
451 error = xfs_blkdev_get(mp, args->logname, &logdev);
452 if (error)
453 return error;
454 }
455 if (args->rtname[0]) {
456 error = xfs_blkdev_get(mp, args->rtname, &rtdev);
457 if (error) {
458 xfs_blkdev_put(logdev);
459 return error;
460 }
461
462 if (rtdev == ddev || rtdev == logdev) {
463 cmn_err(CE_WARN,
464 "XFS: Cannot mount filesystem with identical rtdev and ddev/logdev.");
465 xfs_blkdev_put(logdev);
466 xfs_blkdev_put(rtdev);
467 return EINVAL;
468 }
469 }
470
471 /*
472 * Setup xfs_mount buffer target pointers
473 */
474 error = ENOMEM;
475 mp->m_ddev_targp = xfs_alloc_buftarg(ddev, 0);
476 if (!mp->m_ddev_targp) {
477 xfs_blkdev_put(logdev);
478 xfs_blkdev_put(rtdev);
479 return error;
480 }
481 if (rtdev) {
482 mp->m_rtdev_targp = xfs_alloc_buftarg(rtdev, 1);
483 if (!mp->m_rtdev_targp) {
484 xfs_blkdev_put(logdev);
485 xfs_blkdev_put(rtdev);
486 goto error0;
487 }
488 }
489 mp->m_logdev_targp = (logdev && logdev != ddev) ?
490 xfs_alloc_buftarg(logdev, 1) : mp->m_ddev_targp;
491 if (!mp->m_logdev_targp) {
492 xfs_blkdev_put(logdev);
493 xfs_blkdev_put(rtdev);
494 goto error0;
495 }
496
497 /*
498 * Setup flags based on mount(2) options and then the superblock
499 */
500 error = xfs_start_flags(vfsp, args, mp);
501 if (error)
502 goto error1;
503 error = xfs_readsb(mp, flags);
504 if (error)
505 goto error1;
506 error = xfs_finish_flags(vfsp, args, mp);
507 if (error)
508 goto error2;
509
510 /*
511 * Setup xfs_mount buffer target pointers based on superblock
512 */
513 error = xfs_setsize_buftarg(mp->m_ddev_targp, mp->m_sb.sb_blocksize,
514 mp->m_sb.sb_sectsize);
515 if (!error && logdev && logdev != ddev) {
516 unsigned int log_sector_size = BBSIZE;
517
518 if (XFS_SB_VERSION_HASSECTOR(&mp->m_sb))
519 log_sector_size = mp->m_sb.sb_logsectsize;
520 error = xfs_setsize_buftarg(mp->m_logdev_targp,
521 mp->m_sb.sb_blocksize,
522 log_sector_size);
523 }
524 if (!error && rtdev)
525 error = xfs_setsize_buftarg(mp->m_rtdev_targp,
526 mp->m_sb.sb_blocksize,
527 mp->m_sb.sb_sectsize);
528 if (error)
529 goto error2;
530
531 if (mp->m_flags & XFS_MOUNT_BARRIER)
532 xfs_mountfs_check_barriers(mp);
533
534 if ((error = xfs_filestream_mount(mp)))
535 goto error2;
536
537 error = XFS_IOINIT(vfsp, args, flags);
538 if (error)
539 goto error2;
540
541 return 0;
542
543 error2:
544 if (mp->m_sb_bp)
545 xfs_freesb(mp);
546 error1:
547 xfs_binval(mp->m_ddev_targp);
548 if (logdev && logdev != ddev)
549 xfs_binval(mp->m_logdev_targp);
550 if (rtdev)
551 xfs_binval(mp->m_rtdev_targp);
552 error0:
553 xfs_unmountfs_close(mp, credp);
554 return error;
555 }
556
557 STATIC int
558 xfs_unmount(
559 bhv_desc_t *bdp,
560 int flags,
561 cred_t *credp)
562 {
563 bhv_vfs_t *vfsp = bhvtovfs(bdp);
564 xfs_mount_t *mp = XFS_BHVTOM(bdp);
565 xfs_inode_t *rip;
566 bhv_vnode_t *rvp;
567 int unmount_event_wanted = 0;
568 int unmount_event_flags = 0;
569 int xfs_unmountfs_needed = 0;
570 int error;
571
572 rip = mp->m_rootip;
573 rvp = XFS_ITOV(rip);
574
575 if (vfsp->vfs_flag & VFS_DMI) {
576 error = XFS_SEND_PREUNMOUNT(mp, vfsp,
577 rvp, DM_RIGHT_NULL, rvp, DM_RIGHT_NULL,
578 NULL, NULL, 0, 0,
579 (mp->m_dmevmask & (1<<DM_EVENT_PREUNMOUNT))?
580 0:DM_FLAGS_UNWANTED);
581 if (error)
582 return XFS_ERROR(error);
583 unmount_event_wanted = 1;
584 unmount_event_flags = (mp->m_dmevmask & (1<<DM_EVENT_UNMOUNT))?
585 0 : DM_FLAGS_UNWANTED;
586 }
587
588 /*
589 * First blow any referenced inode from this file system
590 * out of the reference cache, and delete the timer.
591 */
592 xfs_refcache_purge_mp(mp);
593
594 /*
595 * Blow away any referenced inode in the filestreams cache.
596 * This can and will cause log traffic as inodes go inactive
597 * here.
598 */
599 xfs_filestream_unmount(mp);
600
601 XFS_bflush(mp->m_ddev_targp);
602 error = xfs_unmount_flush(mp, 0);
603 if (error)
604 goto out;
605
606 ASSERT(vn_count(rvp) == 1);
607
608 /*
609 * Drop the reference count
610 */
611 VN_RELE(rvp);
612
613 /*
614 * If we're forcing a shutdown, typically because of a media error,
615 * we want to make sure we invalidate dirty pages that belong to
616 * referenced vnodes as well.
617 */
618 if (XFS_FORCED_SHUTDOWN(mp)) {
619 error = xfs_sync(&mp->m_bhv,
620 (SYNC_WAIT | SYNC_CLOSE), credp);
621 ASSERT(error != EFSCORRUPTED);
622 }
623 xfs_unmountfs_needed = 1;
624
625 out:
626 /* Send DMAPI event, if required.
627 * Then do xfs_unmountfs() if needed.
628 * Then return error (or zero).
629 */
630 if (unmount_event_wanted) {
631 /* Note: mp structure must still exist for
632 * XFS_SEND_UNMOUNT() call.
633 */
634 XFS_SEND_UNMOUNT(mp, vfsp, error == 0 ? rvp : NULL,
635 DM_RIGHT_NULL, 0, error, unmount_event_flags);
636 }
637 if (xfs_unmountfs_needed) {
638 /*
639 * Call common unmount function to flush to disk
640 * and free the super block buffer & mount structures.
641 */
642 xfs_unmountfs(mp, credp);
643 }
644
645 return XFS_ERROR(error);
646 }
647
648 STATIC int
649 xfs_quiesce_fs(
650 xfs_mount_t *mp)
651 {
652 int count = 0, pincount;
653
654 xfs_refcache_purge_mp(mp);
655 xfs_flush_buftarg(mp->m_ddev_targp, 0);
656 xfs_finish_reclaim_all(mp, 0);
657
658 /* This loop must run at least twice.
659 * The first instance of the loop will flush
660 * most meta data but that will generate more
661 * meta data (typically directory updates).
662 * Which then must be flushed and logged before
663 * we can write the unmount record.
664 */
665 do {
666 xfs_syncsub(mp, SYNC_INODE_QUIESCE, NULL);
667 pincount = xfs_flush_buftarg(mp->m_ddev_targp, 1);
668 if (!pincount) {
669 delay(50);
670 count++;
671 }
672 } while (count < 2);
673
674 return 0;
675 }
676
677 /*
678 * Second stage of a quiesce. The data is already synced, now we have to take
679 * care of the metadata. New transactions are already blocked, so we need to
680 * wait for any remaining transactions to drain out before proceding.
681 */
682 STATIC void
683 xfs_attr_quiesce(
684 xfs_mount_t *mp)
685 {
686 /* wait for all modifications to complete */
687 while (atomic_read(&mp->m_active_trans) > 0)
688 delay(100);
689
690 /* flush inodes and push all remaining buffers out to disk */
691 xfs_quiesce_fs(mp);
692
693 ASSERT_ALWAYS(atomic_read(&mp->m_active_trans) == 0);
694
695 /* Push the superblock and write an unmount record */
696 xfs_log_sbcount(mp, 1);
697 xfs_log_unmount_write(mp);
698 xfs_unmountfs_writesb(mp);
699 }
700
701 STATIC int
702 xfs_mntupdate(
703 bhv_desc_t *bdp,
704 int *flags,
705 struct xfs_mount_args *args)
706 {
707 bhv_vfs_t *vfsp = bhvtovfs(bdp);
708 xfs_mount_t *mp = XFS_BHVTOM(bdp);
709
710 if (!(*flags & MS_RDONLY)) { /* rw/ro -> rw */
711 if (vfsp->vfs_flag & VFS_RDONLY)
712 vfsp->vfs_flag &= ~VFS_RDONLY;
713 if (args->flags & XFSMNT_BARRIER) {
714 mp->m_flags |= XFS_MOUNT_BARRIER;
715 xfs_mountfs_check_barriers(mp);
716 } else {
717 mp->m_flags &= ~XFS_MOUNT_BARRIER;
718 }
719 } else if (!(vfsp->vfs_flag & VFS_RDONLY)) { /* rw -> ro */
720 xfs_filestream_flush(mp);
721 bhv_vfs_sync(vfsp, SYNC_DATA_QUIESCE, NULL);
722 xfs_attr_quiesce(mp);
723 vfsp->vfs_flag |= VFS_RDONLY;
724 }
725 return 0;
726 }
727
728 /*
729 * xfs_unmount_flush implements a set of flush operation on special
730 * inodes, which are needed as a separate set of operations so that
731 * they can be called as part of relocation process.
732 */
733 int
734 xfs_unmount_flush(
735 xfs_mount_t *mp, /* Mount structure we are getting
736 rid of. */
737 int relocation) /* Called from vfs relocation. */
738 {
739 xfs_inode_t *rip = mp->m_rootip;
740 xfs_inode_t *rbmip;
741 xfs_inode_t *rsumip = NULL;
742 bhv_vnode_t *rvp = XFS_ITOV(rip);
743 int error;
744
745 xfs_ilock(rip, XFS_ILOCK_EXCL | XFS_ILOCK_PARENT);
746 xfs_iflock(rip);
747
748 /*
749 * Flush out the real time inodes.
750 */
751 if ((rbmip = mp->m_rbmip) != NULL) {
752 xfs_ilock(rbmip, XFS_ILOCK_EXCL);
753 xfs_iflock(rbmip);
754 error = xfs_iflush(rbmip, XFS_IFLUSH_SYNC);
755 xfs_iunlock(rbmip, XFS_ILOCK_EXCL);
756
757 if (error == EFSCORRUPTED)
758 goto fscorrupt_out;
759
760 ASSERT(vn_count(XFS_ITOV(rbmip)) == 1);
761
762 rsumip = mp->m_rsumip;
763 xfs_ilock(rsumip, XFS_ILOCK_EXCL);
764 xfs_iflock(rsumip);
765 error = xfs_iflush(rsumip, XFS_IFLUSH_SYNC);
766 xfs_iunlock(rsumip, XFS_ILOCK_EXCL);
767
768 if (error == EFSCORRUPTED)
769 goto fscorrupt_out;
770
771 ASSERT(vn_count(XFS_ITOV(rsumip)) == 1);
772 }
773
774 /*
775 * Synchronously flush root inode to disk
776 */
777 error = xfs_iflush(rip, XFS_IFLUSH_SYNC);
778 if (error == EFSCORRUPTED)
779 goto fscorrupt_out2;
780
781 if (vn_count(rvp) != 1 && !relocation) {
782 xfs_iunlock(rip, XFS_ILOCK_EXCL);
783 return XFS_ERROR(EBUSY);
784 }
785
786 /*
787 * Release dquot that rootinode, rbmino and rsumino might be holding,
788 * flush and purge the quota inodes.
789 */
790 error = XFS_QM_UNMOUNT(mp);
791 if (error == EFSCORRUPTED)
792 goto fscorrupt_out2;
793
794 if (rbmip) {
795 VN_RELE(XFS_ITOV(rbmip));
796 VN_RELE(XFS_ITOV(rsumip));
797 }
798
799 xfs_iunlock(rip, XFS_ILOCK_EXCL);
800 return 0;
801
802 fscorrupt_out:
803 xfs_ifunlock(rip);
804
805 fscorrupt_out2:
806 xfs_iunlock(rip, XFS_ILOCK_EXCL);
807
808 return XFS_ERROR(EFSCORRUPTED);
809 }
810
811 /*
812 * xfs_root extracts the root vnode from a vfs.
813 *
814 * vfsp -- the vfs struct for the desired file system
815 * vpp -- address of the caller's vnode pointer which should be
816 * set to the desired fs root vnode
817 */
818 STATIC int
819 xfs_root(
820 bhv_desc_t *bdp,
821 bhv_vnode_t **vpp)
822 {
823 bhv_vnode_t *vp;
824
825 vp = XFS_ITOV((XFS_BHVTOM(bdp))->m_rootip);
826 VN_HOLD(vp);
827 *vpp = vp;
828 return 0;
829 }
830
831 /*
832 * xfs_statvfs
833 *
834 * Fill in the statvfs structure for the given file system. We use
835 * the superblock lock in the mount structure to ensure a consistent
836 * snapshot of the counters returned.
837 */
838 STATIC int
839 xfs_statvfs(
840 bhv_desc_t *bdp,
841 bhv_statvfs_t *statp,
842 bhv_vnode_t *vp)
843 {
844 __uint64_t fakeinos;
845 xfs_extlen_t lsize;
846 xfs_mount_t *mp;
847 xfs_sb_t *sbp;
848 unsigned long s;
849
850 mp = XFS_BHVTOM(bdp);
851 sbp = &(mp->m_sb);
852
853 statp->f_type = XFS_SB_MAGIC;
854
855 xfs_icsb_sync_counters_flags(mp, XFS_ICSB_LAZY_COUNT);
856 s = XFS_SB_LOCK(mp);
857 statp->f_bsize = sbp->sb_blocksize;
858 lsize = sbp->sb_logstart ? sbp->sb_logblocks : 0;
859 statp->f_blocks = sbp->sb_dblocks - lsize;
860 statp->f_bfree = statp->f_bavail =
861 sbp->sb_fdblocks - XFS_ALLOC_SET_ASIDE(mp);
862 fakeinos = statp->f_bfree << sbp->sb_inopblog;
863 #if XFS_BIG_INUMS
864 fakeinos += mp->m_inoadd;
865 #endif
866 statp->f_files =
867 MIN(sbp->sb_icount + fakeinos, (__uint64_t)XFS_MAXINUMBER);
868 if (mp->m_maxicount)
869 #if XFS_BIG_INUMS
870 if (!mp->m_inoadd)
871 #endif
872 statp->f_files = min_t(typeof(statp->f_files),
873 statp->f_files,
874 mp->m_maxicount);
875 statp->f_ffree = statp->f_files - (sbp->sb_icount - sbp->sb_ifree);
876 XFS_SB_UNLOCK(mp, s);
877
878 xfs_statvfs_fsid(statp, mp);
879 statp->f_namelen = MAXNAMELEN - 1;
880
881 return 0;
882 }
883
884
885 /*
886 * xfs_sync flushes any pending I/O to file system vfsp.
887 *
888 * This routine is called by vfs_sync() to make sure that things make it
889 * out to disk eventually, on sync() system calls to flush out everything,
890 * and when the file system is unmounted. For the vfs_sync() case, all
891 * we really need to do is sync out the log to make all of our meta-data
892 * updates permanent (except for timestamps). For calls from pflushd(),
893 * dirty pages are kept moving by calling pdflush() on the inodes
894 * containing them. We also flush the inodes that we can lock without
895 * sleeping and the superblock if we can lock it without sleeping from
896 * vfs_sync() so that items at the tail of the log are always moving out.
897 *
898 * Flags:
899 * SYNC_BDFLUSH - We're being called from vfs_sync() so we don't want
900 * to sleep if we can help it. All we really need
901 * to do is ensure that the log is synced at least
902 * periodically. We also push the inodes and
903 * superblock if we can lock them without sleeping
904 * and they are not pinned.
905 * SYNC_ATTR - We need to flush the inodes. If SYNC_BDFLUSH is not
906 * set, then we really want to lock each inode and flush
907 * it.
908 * SYNC_WAIT - All the flushes that take place in this call should
909 * be synchronous.
910 * SYNC_DELWRI - This tells us to push dirty pages associated with
911 * inodes. SYNC_WAIT and SYNC_BDFLUSH are used to
912 * determine if they should be flushed sync, async, or
913 * delwri.
914 * SYNC_CLOSE - This flag is passed when the system is being
915 * unmounted. We should sync and invalidate everything.
916 * SYNC_FSDATA - This indicates that the caller would like to make
917 * sure the superblock is safe on disk. We can ensure
918 * this by simply making sure the log gets flushed
919 * if SYNC_BDFLUSH is set, and by actually writing it
920 * out otherwise.
921 * SYNC_IOWAIT - The caller wants us to wait for all data I/O to complete
922 * before we return (including direct I/O). Forms the drain
923 * side of the write barrier needed to safely quiesce the
924 * filesystem.
925 *
926 */
927 /*ARGSUSED*/
928 STATIC int
929 xfs_sync(
930 bhv_desc_t *bdp,
931 int flags,
932 cred_t *credp)
933 {
934 xfs_mount_t *mp = XFS_BHVTOM(bdp);
935
936 if (flags & SYNC_IOWAIT)
937 xfs_filestream_flush(mp);
938
939 return xfs_syncsub(mp, flags, NULL);
940 }
941
942 /*
943 * xfs sync routine for internal use
944 *
945 * This routine supports all of the flags defined for the generic vfs_sync
946 * interface as explained above under xfs_sync.
947 *
948 */
949 int
950 xfs_sync_inodes(
951 xfs_mount_t *mp,
952 int flags,
953 int *bypassed)
954 {
955 xfs_inode_t *ip = NULL;
956 xfs_inode_t *ip_next;
957 xfs_buf_t *bp;
958 bhv_vnode_t *vp = NULL;
959 int error;
960 int last_error;
961 uint64_t fflag;
962 uint lock_flags;
963 uint base_lock_flags;
964 boolean_t mount_locked;
965 boolean_t vnode_refed;
966 int preempt;
967 xfs_dinode_t *dip;
968 xfs_iptr_t *ipointer;
969 #ifdef DEBUG
970 boolean_t ipointer_in = B_FALSE;
971
972 #define IPOINTER_SET ipointer_in = B_TRUE
973 #define IPOINTER_CLR ipointer_in = B_FALSE
974 #else
975 #define IPOINTER_SET
976 #define IPOINTER_CLR
977 #endif
978
979
980 /* Insert a marker record into the inode list after inode ip. The list
981 * must be locked when this is called. After the call the list will no
982 * longer be locked.
983 */
984 #define IPOINTER_INSERT(ip, mp) { \
985 ASSERT(ipointer_in == B_FALSE); \
986 ipointer->ip_mnext = ip->i_mnext; \
987 ipointer->ip_mprev = ip; \
988 ip->i_mnext = (xfs_inode_t *)ipointer; \
989 ipointer->ip_mnext->i_mprev = (xfs_inode_t *)ipointer; \
990 preempt = 0; \
991 XFS_MOUNT_IUNLOCK(mp); \
992 mount_locked = B_FALSE; \
993 IPOINTER_SET; \
994 }
995
996 /* Remove the marker from the inode list. If the marker was the only item
997 * in the list then there are no remaining inodes and we should zero out
998 * the whole list. If we are the current head of the list then move the head
999 * past us.
1000 */
1001 #define IPOINTER_REMOVE(ip, mp) { \
1002 ASSERT(ipointer_in == B_TRUE); \
1003 if (ipointer->ip_mnext != (xfs_inode_t *)ipointer) { \
1004 ip = ipointer->ip_mnext; \
1005 ip->i_mprev = ipointer->ip_mprev; \
1006 ipointer->ip_mprev->i_mnext = ip; \
1007 if (mp->m_inodes == (xfs_inode_t *)ipointer) { \
1008 mp->m_inodes = ip; \
1009 } \
1010 } else { \
1011 ASSERT(mp->m_inodes == (xfs_inode_t *)ipointer); \
1012 mp->m_inodes = NULL; \
1013 ip = NULL; \
1014 } \
1015 IPOINTER_CLR; \
1016 }
1017
1018 #define XFS_PREEMPT_MASK 0x7f
1019
1020 if (bypassed)
1021 *bypassed = 0;
1022 if (XFS_MTOVFS(mp)->vfs_flag & VFS_RDONLY)
1023 return 0;
1024 error = 0;
1025 last_error = 0;
1026 preempt = 0;
1027
1028 /* Allocate a reference marker */
1029 ipointer = (xfs_iptr_t *)kmem_zalloc(sizeof(xfs_iptr_t), KM_SLEEP);
1030
1031 fflag = XFS_B_ASYNC; /* default is don't wait */
1032 if (flags & (SYNC_BDFLUSH | SYNC_DELWRI))
1033 fflag = XFS_B_DELWRI;
1034 if (flags & SYNC_WAIT)
1035 fflag = 0; /* synchronous overrides all */
1036
1037 base_lock_flags = XFS_ILOCK_SHARED;
1038 if (flags & (SYNC_DELWRI | SYNC_CLOSE)) {
1039 /*
1040 * We need the I/O lock if we're going to call any of
1041 * the flush/inval routines.
1042 */
1043 base_lock_flags |= XFS_IOLOCK_SHARED;
1044 }
1045
1046 XFS_MOUNT_ILOCK(mp);
1047
1048 ip = mp->m_inodes;
1049
1050 mount_locked = B_TRUE;
1051 vnode_refed = B_FALSE;
1052
1053 IPOINTER_CLR;
1054
1055 do {
1056 ASSERT(ipointer_in == B_FALSE);
1057 ASSERT(vnode_refed == B_FALSE);
1058
1059 lock_flags = base_lock_flags;
1060
1061 /*
1062 * There were no inodes in the list, just break out
1063 * of the loop.
1064 */
1065 if (ip == NULL) {
1066 break;
1067 }
1068
1069 /*
1070 * We found another sync thread marker - skip it
1071 */
1072 if (ip->i_mount == NULL) {
1073 ip = ip->i_mnext;
1074 continue;
1075 }
1076
1077 vp = XFS_ITOV_NULL(ip);
1078
1079 /*
1080 * If the vnode is gone then this is being torn down,
1081 * call reclaim if it is flushed, else let regular flush
1082 * code deal with it later in the loop.
1083 */
1084
1085 if (vp == NULL) {
1086 /* Skip ones already in reclaim */
1087 if (ip->i_flags & XFS_IRECLAIM) {
1088 ip = ip->i_mnext;
1089 continue;
1090 }
1091 if (xfs_ilock_nowait(ip, XFS_ILOCK_EXCL) == 0) {
1092 ip = ip->i_mnext;
1093 } else if ((xfs_ipincount(ip) == 0) &&
1094 xfs_iflock_nowait(ip)) {
1095 IPOINTER_INSERT(ip, mp);
1096
1097 xfs_finish_reclaim(ip, 1,
1098 XFS_IFLUSH_DELWRI_ELSE_ASYNC);
1099
1100 XFS_MOUNT_ILOCK(mp);
1101 mount_locked = B_TRUE;
1102 IPOINTER_REMOVE(ip, mp);
1103 } else {
1104 xfs_iunlock(ip, XFS_ILOCK_EXCL);
1105 ip = ip->i_mnext;
1106 }
1107 continue;
1108 }
1109
1110 if (VN_BAD(vp)) {
1111 ip = ip->i_mnext;
1112 continue;
1113 }
1114
1115 if (XFS_FORCED_SHUTDOWN(mp) && !(flags & SYNC_CLOSE)) {
1116 XFS_MOUNT_IUNLOCK(mp);
1117 kmem_free(ipointer, sizeof(xfs_iptr_t));
1118 return 0;
1119 }
1120
1121 /*
1122 * If this is just vfs_sync() or pflushd() calling
1123 * then we can skip inodes for which it looks like
1124 * there is nothing to do. Since we don't have the
1125 * inode locked this is racy, but these are periodic
1126 * calls so it doesn't matter. For the others we want
1127 * to know for sure, so we at least try to lock them.
1128 */
1129 if (flags & SYNC_BDFLUSH) {
1130 if (((ip->i_itemp == NULL) ||
1131 !(ip->i_itemp->ili_format.ilf_fields &
1132 XFS_ILOG_ALL)) &&
1133 (ip->i_update_core == 0)) {
1134 ip = ip->i_mnext;
1135 continue;
1136 }
1137 }
1138
1139 /*
1140 * Try to lock without sleeping. We're out of order with
1141 * the inode list lock here, so if we fail we need to drop
1142 * the mount lock and try again. If we're called from
1143 * bdflush() here, then don't bother.
1144 *
1145 * The inode lock here actually coordinates with the
1146 * almost spurious inode lock in xfs_ireclaim() to prevent
1147 * the vnode we handle here without a reference from
1148 * being freed while we reference it. If we lock the inode
1149 * while it's on the mount list here, then the spurious inode
1150 * lock in xfs_ireclaim() after the inode is pulled from
1151 * the mount list will sleep until we release it here.
1152 * This keeps the vnode from being freed while we reference
1153 * it.
1154 */
1155 if (xfs_ilock_nowait(ip, lock_flags) == 0) {
1156 if ((flags & SYNC_BDFLUSH) || (vp == NULL)) {
1157 ip = ip->i_mnext;
1158 continue;
1159 }
1160
1161 vp = vn_grab(vp);
1162 if (vp == NULL) {
1163 ip = ip->i_mnext;
1164 continue;
1165 }
1166
1167 IPOINTER_INSERT(ip, mp);
1168 xfs_ilock(ip, lock_flags);
1169
1170 ASSERT(vp == XFS_ITOV(ip));
1171 ASSERT(ip->i_mount == mp);
1172
1173 vnode_refed = B_TRUE;
1174 }
1175
1176 /* From here on in the loop we may have a marker record
1177 * in the inode list.
1178 */
1179
1180 /*
1181 * If we have to flush data or wait for I/O completion
1182 * we need to drop the ilock that we currently hold.
1183 * If we need to drop the lock, insert a marker if we
1184 * have not already done so.
1185 */
1186 if ((flags & (SYNC_CLOSE|SYNC_IOWAIT)) ||
1187 ((flags & SYNC_DELWRI) && VN_DIRTY(vp))) {
1188 if (mount_locked) {
1189 IPOINTER_INSERT(ip, mp);
1190 }
1191 xfs_iunlock(ip, XFS_ILOCK_SHARED);
1192
1193 if (flags & SYNC_CLOSE) {
1194 /* Shutdown case. Flush and invalidate. */
1195 if (XFS_FORCED_SHUTDOWN(mp))
1196 bhv_vop_toss_pages(vp, 0, -1, FI_REMAPF);
1197 else
1198 error = bhv_vop_flushinval_pages(vp, 0,
1199 -1, FI_REMAPF);
1200 } else if ((flags & SYNC_DELWRI) && VN_DIRTY(vp)) {
1201 error = bhv_vop_flush_pages(vp, (xfs_off_t)0,
1202 -1, fflag, FI_NONE);
1203 }
1204
1205 /*
1206 * When freezing, we need to wait ensure all I/O (including direct
1207 * I/O) is complete to ensure no further data modification can take
1208 * place after this point
1209 */
1210 if (flags & SYNC_IOWAIT)
1211 vn_iowait(vp);
1212
1213 xfs_ilock(ip, XFS_ILOCK_SHARED);
1214 }
1215
1216 if (flags & SYNC_BDFLUSH) {
1217 if ((flags & SYNC_ATTR) &&
1218 ((ip->i_update_core) ||
1219 ((ip->i_itemp != NULL) &&
1220 (ip->i_itemp->ili_format.ilf_fields != 0)))) {
1221
1222 /* Insert marker and drop lock if not already
1223 * done.
1224 */
1225 if (mount_locked) {
1226 IPOINTER_INSERT(ip, mp);
1227 }
1228
1229 /*
1230 * We don't want the periodic flushing of the
1231 * inodes by vfs_sync() to interfere with
1232 * I/O to the file, especially read I/O
1233 * where it is only the access time stamp
1234 * that is being flushed out. To prevent
1235 * long periods where we have both inode
1236 * locks held shared here while reading the
1237 * inode's buffer in from disk, we drop the
1238 * inode lock while reading in the inode
1239 * buffer. We have to release the buffer
1240 * and reacquire the inode lock so that they
1241 * are acquired in the proper order (inode
1242 * locks first). The buffer will go at the
1243 * end of the lru chain, though, so we can
1244 * expect it to still be there when we go
1245 * for it again in xfs_iflush().
1246 */
1247 if ((xfs_ipincount(ip) == 0) &&
1248 xfs_iflock_nowait(ip)) {
1249
1250 xfs_ifunlock(ip);
1251 xfs_iunlock(ip, XFS_ILOCK_SHARED);
1252
1253 error = xfs_itobp(mp, NULL, ip,
1254 &dip, &bp, 0, 0);
1255 if (!error) {
1256 xfs_buf_relse(bp);
1257 } else {
1258 /* Bailing out, remove the
1259 * marker and free it.
1260 */
1261 XFS_MOUNT_ILOCK(mp);
1262 IPOINTER_REMOVE(ip, mp);
1263 XFS_MOUNT_IUNLOCK(mp);
1264
1265 ASSERT(!(lock_flags &
1266 XFS_IOLOCK_SHARED));
1267
1268 kmem_free(ipointer,
1269 sizeof(xfs_iptr_t));
1270 return (0);
1271 }
1272
1273 /*
1274 * Since we dropped the inode lock,
1275 * the inode may have been reclaimed.
1276 * Therefore, we reacquire the mount
1277 * lock and check to see if we were the
1278 * inode reclaimed. If this happened
1279 * then the ipointer marker will no
1280 * longer point back at us. In this
1281 * case, move ip along to the inode
1282 * after the marker, remove the marker
1283 * and continue.
1284 */
1285 XFS_MOUNT_ILOCK(mp);
1286 mount_locked = B_TRUE;
1287
1288 if (ip != ipointer->ip_mprev) {
1289 IPOINTER_REMOVE(ip, mp);
1290
1291 ASSERT(!vnode_refed);
1292 ASSERT(!(lock_flags &
1293 XFS_IOLOCK_SHARED));
1294 continue;
1295 }
1296
1297 ASSERT(ip->i_mount == mp);
1298
1299 if (xfs_ilock_nowait(ip,
1300 XFS_ILOCK_SHARED) == 0) {
1301 ASSERT(ip->i_mount == mp);
1302 /*
1303 * We failed to reacquire
1304 * the inode lock without
1305 * sleeping, so just skip
1306 * the inode for now. We
1307 * clear the ILOCK bit from
1308 * the lock_flags so that we
1309 * won't try to drop a lock
1310 * we don't hold below.
1311 */
1312 lock_flags &= ~XFS_ILOCK_SHARED;
1313 IPOINTER_REMOVE(ip_next, mp);
1314 } else if ((xfs_ipincount(ip) == 0) &&
1315 xfs_iflock_nowait(ip)) {
1316 ASSERT(ip->i_mount == mp);
1317 /*
1318 * Since this is vfs_sync()
1319 * calling we only flush the
1320 * inode out if we can lock
1321 * it without sleeping and
1322 * it is not pinned. Drop
1323 * the mount lock here so
1324 * that we don't hold it for
1325 * too long. We already have
1326 * a marker in the list here.
1327 */
1328 XFS_MOUNT_IUNLOCK(mp);
1329 mount_locked = B_FALSE;
1330 error = xfs_iflush(ip,
1331 XFS_IFLUSH_DELWRI);
1332 } else {
1333 ASSERT(ip->i_mount == mp);
1334 IPOINTER_REMOVE(ip_next, mp);
1335 }
1336 }
1337
1338 }
1339
1340 } else {
1341 if ((flags & SYNC_ATTR) &&
1342 ((ip->i_update_core) ||
1343 ((ip->i_itemp != NULL) &&
1344 (ip->i_itemp->ili_format.ilf_fields != 0)))) {
1345 if (mount_locked) {
1346 IPOINTER_INSERT(ip, mp);
1347 }
1348
1349 if (flags & SYNC_WAIT) {
1350 xfs_iflock(ip);
1351 error = xfs_iflush(ip,
1352 XFS_IFLUSH_SYNC);
1353 } else {
1354 /*
1355 * If we can't acquire the flush
1356 * lock, then the inode is already
1357 * being flushed so don't bother
1358 * waiting. If we can lock it then
1359 * do a delwri flush so we can
1360 * combine multiple inode flushes
1361 * in each disk write.
1362 */
1363 if (xfs_iflock_nowait(ip)) {
1364 error = xfs_iflush(ip,
1365 XFS_IFLUSH_DELWRI);
1366 }
1367 else if (bypassed)
1368 (*bypassed)++;
1369 }
1370 }
1371 }
1372
1373 if (lock_flags != 0) {
1374 xfs_iunlock(ip, lock_flags);
1375 }
1376
1377 if (vnode_refed) {
1378 /*
1379 * If we had to take a reference on the vnode
1380 * above, then wait until after we've unlocked
1381 * the inode to release the reference. This is
1382 * because we can be already holding the inode
1383 * lock when VN_RELE() calls xfs_inactive().
1384 *
1385 * Make sure to drop the mount lock before calling
1386 * VN_RELE() so that we don't trip over ourselves if
1387 * we have to go for the mount lock again in the
1388 * inactive code.
1389 */
1390 if (mount_locked) {
1391 IPOINTER_INSERT(ip, mp);
1392 }
1393
1394 VN_RELE(vp);
1395
1396 vnode_refed = B_FALSE;
1397 }
1398
1399 if (error) {
1400 last_error = error;
1401 }
1402
1403 /*
1404 * bail out if the filesystem is corrupted.
1405 */
1406 if (error == EFSCORRUPTED) {
1407 if (!mount_locked) {
1408 XFS_MOUNT_ILOCK(mp);
1409 IPOINTER_REMOVE(ip, mp);
1410 }
1411 XFS_MOUNT_IUNLOCK(mp);
1412 ASSERT(ipointer_in == B_FALSE);
1413 kmem_free(ipointer, sizeof(xfs_iptr_t));
1414 return XFS_ERROR(error);
1415 }
1416
1417 /* Let other threads have a chance at the mount lock
1418 * if we have looped many times without dropping the
1419 * lock.
1420 */
1421 if ((++preempt & XFS_PREEMPT_MASK) == 0) {
1422 if (mount_locked) {
1423 IPOINTER_INSERT(ip, mp);
1424 }
1425 }
1426
1427 if (mount_locked == B_FALSE) {
1428 XFS_MOUNT_ILOCK(mp);
1429 mount_locked = B_TRUE;
1430 IPOINTER_REMOVE(ip, mp);
1431 continue;
1432 }
1433
1434 ASSERT(ipointer_in == B_FALSE);
1435 ip = ip->i_mnext;
1436
1437 } while (ip != mp->m_inodes);
1438
1439 XFS_MOUNT_IUNLOCK(mp);
1440
1441 ASSERT(ipointer_in == B_FALSE);
1442
1443 kmem_free(ipointer, sizeof(xfs_iptr_t));
1444 return XFS_ERROR(last_error);
1445 }
1446
1447 /*
1448 * xfs sync routine for internal use
1449 *
1450 * This routine supports all of the flags defined for the generic vfs_sync
1451 * interface as explained above under xfs_sync.
1452 *
1453 */
1454 int
1455 xfs_syncsub(
1456 xfs_mount_t *mp,
1457 int flags,
1458 int *bypassed)
1459 {
1460 int error = 0;
1461 int last_error = 0;
1462 uint log_flags = XFS_LOG_FORCE;
1463 xfs_buf_t *bp;
1464 xfs_buf_log_item_t *bip;
1465
1466 /*
1467 * Sync out the log. This ensures that the log is periodically
1468 * flushed even if there is not enough activity to fill it up.
1469 */
1470 if (flags & SYNC_WAIT)
1471 log_flags |= XFS_LOG_SYNC;
1472
1473 xfs_log_force(mp, (xfs_lsn_t)0, log_flags);
1474
1475 if (flags & (SYNC_ATTR|SYNC_DELWRI)) {
1476 if (flags & SYNC_BDFLUSH)
1477 xfs_finish_reclaim_all(mp, 1);
1478 else
1479 error = xfs_sync_inodes(mp, flags, bypassed);
1480 }
1481
1482 /*
1483 * Flushing out dirty data above probably generated more
1484 * log activity, so if this isn't vfs_sync() then flush
1485 * the log again.
1486 */
1487 if (flags & SYNC_DELWRI) {
1488 xfs_log_force(mp, (xfs_lsn_t)0, log_flags);
1489 }
1490
1491 if (flags & SYNC_FSDATA) {
1492 /*
1493 * If this is vfs_sync() then only sync the superblock
1494 * if we can lock it without sleeping and it is not pinned.
1495 */
1496 if (flags & SYNC_BDFLUSH) {
1497 bp = xfs_getsb(mp, XFS_BUF_TRYLOCK);
1498 if (bp != NULL) {
1499 bip = XFS_BUF_FSPRIVATE(bp,xfs_buf_log_item_t*);
1500 if ((bip != NULL) &&
1501 xfs_buf_item_dirty(bip)) {
1502 if (!(XFS_BUF_ISPINNED(bp))) {
1503 XFS_BUF_ASYNC(bp);
1504 error = xfs_bwrite(mp, bp);
1505 } else {
1506 xfs_buf_relse(bp);
1507 }
1508 } else {
1509 xfs_buf_relse(bp);
1510 }
1511 }
1512 } else {
1513 bp = xfs_getsb(mp, 0);
1514 /*
1515 * If the buffer is pinned then push on the log so
1516 * we won't get stuck waiting in the write for
1517 * someone, maybe ourselves, to flush the log.
1518 * Even though we just pushed the log above, we
1519 * did not have the superblock buffer locked at
1520 * that point so it can become pinned in between
1521 * there and here.
1522 */
1523 if (XFS_BUF_ISPINNED(bp))
1524 xfs_log_force(mp, (xfs_lsn_t)0, XFS_LOG_FORCE);
1525 if (flags & SYNC_WAIT)
1526 XFS_BUF_UNASYNC(bp);
1527 else
1528 XFS_BUF_ASYNC(bp);
1529 error = xfs_bwrite(mp, bp);
1530 }
1531 if (error) {
1532 last_error = error;
1533 }
1534 }
1535
1536 /*
1537 * If this is the periodic sync, then kick some entries out of
1538 * the reference cache. This ensures that idle entries are
1539 * eventually kicked out of the cache.
1540 */
1541 if (flags & SYNC_REFCACHE) {
1542 if (flags & SYNC_WAIT)
1543 xfs_refcache_purge_mp(mp);
1544 else
1545 xfs_refcache_purge_some(mp);
1546 }
1547
1548 /*
1549 * If asked, update the disk superblock with incore counter values if we
1550 * are using non-persistent counters so that they don't get too far out
1551 * of sync if we crash or get a forced shutdown. We don't want to force
1552 * this to disk, just get a transaction into the iclogs....
1553 */
1554 if (flags & SYNC_SUPER)
1555 xfs_log_sbcount(mp, 0);
1556
1557 /*
1558 * Now check to see if the log needs a "dummy" transaction.
1559 */
1560
1561 if (!(flags & SYNC_REMOUNT) && xfs_log_need_covered(mp)) {
1562 xfs_trans_t *tp;
1563 xfs_inode_t *ip;
1564
1565 /*
1566 * Put a dummy transaction in the log to tell
1567 * recovery that all others are OK.
1568 */
1569 tp = xfs_trans_alloc(mp, XFS_TRANS_DUMMY1);
1570 if ((error = xfs_trans_reserve(tp, 0,
1571 XFS_ICHANGE_LOG_RES(mp),
1572 0, 0, 0))) {
1573 xfs_trans_cancel(tp, 0);
1574 return error;
1575 }
1576
1577 ip = mp->m_rootip;
1578 xfs_ilock(ip, XFS_ILOCK_EXCL);
1579
1580 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
1581 xfs_trans_ihold(tp, ip);
1582 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1583 error = xfs_trans_commit(tp, 0);
1584 xfs_iunlock(ip, XFS_ILOCK_EXCL);
1585 xfs_log_force(mp, (xfs_lsn_t)0, log_flags);
1586 }
1587
1588 /*
1589 * When shutting down, we need to insure that the AIL is pushed
1590 * to disk or the filesystem can appear corrupt from the PROM.
1591 */
1592 if ((flags & (SYNC_CLOSE|SYNC_WAIT)) == (SYNC_CLOSE|SYNC_WAIT)) {
1593 XFS_bflush(mp->m_ddev_targp);
1594 if (mp->m_rtdev_targp) {
1595 XFS_bflush(mp->m_rtdev_targp);
1596 }
1597 }
1598
1599 return XFS_ERROR(last_error);
1600 }
1601
1602 /*
1603 * xfs_vget - called by DMAPI and NFSD to get vnode from file handle
1604 */
1605 STATIC int
1606 xfs_vget(
1607 bhv_desc_t *bdp,
1608 bhv_vnode_t **vpp,
1609 fid_t *fidp)
1610 {
1611 xfs_mount_t *mp = XFS_BHVTOM(bdp);
1612 xfs_fid_t *xfid = (struct xfs_fid *)fidp;
1613 xfs_inode_t *ip;
1614 int error;
1615 xfs_ino_t ino;
1616 unsigned int igen;
1617
1618 /*
1619 * Invalid. Since handles can be created in user space and passed in
1620 * via gethandle(), this is not cause for a panic.
1621 */
1622 if (xfid->xfs_fid_len != sizeof(*xfid) - sizeof(xfid->xfs_fid_len))
1623 return XFS_ERROR(EINVAL);
1624
1625 ino = xfid->xfs_fid_ino;
1626 igen = xfid->xfs_fid_gen;
1627
1628 /*
1629 * NFS can sometimes send requests for ino 0. Fail them gracefully.
1630 */
1631 if (ino == 0)
1632 return XFS_ERROR(ESTALE);
1633
1634 error = xfs_iget(mp, NULL, ino, 0, XFS_ILOCK_SHARED, &ip, 0);
1635 if (error) {
1636 *vpp = NULL;
1637 return error;
1638 }
1639
1640 if (ip == NULL) {
1641 *vpp = NULL;
1642 return XFS_ERROR(EIO);
1643 }
1644
1645 if (ip->i_d.di_mode == 0 || ip->i_d.di_gen != igen) {
1646 xfs_iput_new(ip, XFS_ILOCK_SHARED);
1647 *vpp = NULL;
1648 return XFS_ERROR(ENOENT);
1649 }
1650
1651 *vpp = XFS_ITOV(ip);
1652 xfs_iunlock(ip, XFS_ILOCK_SHARED);
1653 return 0;
1654 }
1655
1656
1657 #define MNTOPT_LOGBUFS "logbufs" /* number of XFS log buffers */
1658 #define MNTOPT_LOGBSIZE "logbsize" /* size of XFS log buffers */
1659 #define MNTOPT_LOGDEV "logdev" /* log device */
1660 #define MNTOPT_RTDEV "rtdev" /* realtime I/O device */
1661 #define MNTOPT_BIOSIZE "biosize" /* log2 of preferred buffered io size */
1662 #define MNTOPT_WSYNC "wsync" /* safe-mode nfs compatible mount */
1663 #define MNTOPT_INO64 "ino64" /* force inodes into 64-bit range */
1664 #define MNTOPT_NOALIGN "noalign" /* turn off stripe alignment */
1665 #define MNTOPT_SWALLOC "swalloc" /* turn on stripe width allocation */
1666 #define MNTOPT_SUNIT "sunit" /* data volume stripe unit */
1667 #define MNTOPT_SWIDTH "swidth" /* data volume stripe width */
1668 #define MNTOPT_NOUUID "nouuid" /* ignore filesystem UUID */
1669 #define MNTOPT_MTPT "mtpt" /* filesystem mount point */
1670 #define MNTOPT_GRPID "grpid" /* group-ID from parent directory */
1671 #define MNTOPT_NOGRPID "nogrpid" /* group-ID from current process */
1672 #define MNTOPT_BSDGROUPS "bsdgroups" /* group-ID from parent directory */
1673 #define MNTOPT_SYSVGROUPS "sysvgroups" /* group-ID from current process */
1674 #define MNTOPT_ALLOCSIZE "allocsize" /* preferred allocation size */
1675 #define MNTOPT_IHASHSIZE "ihashsize" /* size of inode hash table */
1676 #define MNTOPT_NORECOVERY "norecovery" /* don't run XFS recovery */
1677 #define MNTOPT_BARRIER "barrier" /* use writer barriers for log write and
1678 * unwritten extent conversion */
1679 #define MNTOPT_NOBARRIER "nobarrier" /* .. disable */
1680 #define MNTOPT_OSYNCISOSYNC "osyncisosync" /* o_sync is REALLY o_sync */
1681 #define MNTOPT_64BITINODE "inode64" /* inodes can be allocated anywhere */
1682 #define MNTOPT_IKEEP "ikeep" /* do not free empty inode clusters */
1683 #define MNTOPT_NOIKEEP "noikeep" /* free empty inode clusters */
1684 #define MNTOPT_LARGEIO "largeio" /* report large I/O sizes in stat() */
1685 #define MNTOPT_NOLARGEIO "nolargeio" /* do not report large I/O sizes
1686 * in stat(). */
1687 #define MNTOPT_ATTR2 "attr2" /* do use attr2 attribute format */
1688 #define MNTOPT_NOATTR2 "noattr2" /* do not use attr2 attribute format */
1689 #define MNTOPT_FILESTREAM "filestreams" /* use filestreams allocator */
1690
1691 STATIC unsigned long
1692 suffix_strtoul(char *s, char **endp, unsigned int base)
1693 {
1694 int last, shift_left_factor = 0;
1695 char *value = s;
1696
1697 last = strlen(value) - 1;
1698 if (value[last] == 'K' || value[last] == 'k') {
1699 shift_left_factor = 10;
1700 value[last] = '\0';
1701 }
1702 if (value[last] == 'M' || value[last] == 'm') {
1703 shift_left_factor = 20;
1704 value[last] = '\0';
1705 }
1706 if (value[last] == 'G' || value[last] == 'g') {
1707 shift_left_factor = 30;
1708 value[last] = '\0';
1709 }
1710
1711 return simple_strtoul((const char *)s, endp, base) << shift_left_factor;
1712 }
1713
1714 STATIC int
1715 xfs_parseargs(
1716 struct bhv_desc *bhv,
1717 char *options,
1718 struct xfs_mount_args *args,
1719 int update)
1720 {
1721 bhv_vfs_t *vfsp = bhvtovfs(bhv);
1722 char *this_char, *value, *eov;
1723 int dsunit, dswidth, vol_dsunit, vol_dswidth;
1724 int iosize;
1725
1726 args->flags |= XFSMNT_IDELETE;
1727 args->flags |= XFSMNT_BARRIER;
1728 args->flags2 |= XFSMNT2_COMPAT_IOSIZE;
1729
1730 if (!options)
1731 goto done;
1732
1733 iosize = dsunit = dswidth = vol_dsunit = vol_dswidth = 0;
1734
1735 while ((this_char = strsep(&options, ",")) != NULL) {
1736 if (!*this_char)
1737 continue;
1738 if ((value = strchr(this_char, '=')) != NULL)
1739 *value++ = 0;
1740
1741 if (!strcmp(this_char, MNTOPT_LOGBUFS)) {
1742 if (!value || !*value) {
1743 cmn_err(CE_WARN,
1744 "XFS: %s option requires an argument",
1745 this_char);
1746 return EINVAL;
1747 }
1748 args->logbufs = simple_strtoul(value, &eov, 10);
1749 } else if (!strcmp(this_char, MNTOPT_LOGBSIZE)) {
1750 if (!value || !*value) {
1751 cmn_err(CE_WARN,
1752 "XFS: %s option requires an argument",
1753 this_char);
1754 return EINVAL;
1755 }
1756 args->logbufsize = suffix_strtoul(value, &eov, 10);
1757 } else if (!strcmp(this_char, MNTOPT_LOGDEV)) {
1758 if (!value || !*value) {
1759 cmn_err(CE_WARN,
1760 "XFS: %s option requires an argument",
1761 this_char);
1762 return EINVAL;
1763 }
1764 strncpy(args->logname, value, MAXNAMELEN);
1765 } else if (!strcmp(this_char, MNTOPT_MTPT)) {
1766 if (!value || !*value) {
1767 cmn_err(CE_WARN,
1768 "XFS: %s option requires an argument",
1769 this_char);
1770 return EINVAL;
1771 }
1772 strncpy(args->mtpt, value, MAXNAMELEN);
1773 } else if (!strcmp(this_char, MNTOPT_RTDEV)) {
1774 if (!value || !*value) {
1775 cmn_err(CE_WARN,
1776 "XFS: %s option requires an argument",
1777 this_char);
1778 return EINVAL;
1779 }
1780 strncpy(args->rtname, value, MAXNAMELEN);
1781 } else if (!strcmp(this_char, MNTOPT_BIOSIZE)) {
1782 if (!value || !*value) {
1783 cmn_err(CE_WARN,
1784 "XFS: %s option requires an argument",
1785 this_char);
1786 return EINVAL;
1787 }
1788 iosize = simple_strtoul(value, &eov, 10);
1789 args->flags |= XFSMNT_IOSIZE;
1790 args->iosizelog = (uint8_t) iosize;
1791 } else if (!strcmp(this_char, MNTOPT_ALLOCSIZE)) {
1792 if (!value || !*value) {
1793 cmn_err(CE_WARN,
1794 "XFS: %s option requires an argument",
1795 this_char);
1796 return EINVAL;
1797 }
1798 iosize = suffix_strtoul(value, &eov, 10);
1799 args->flags |= XFSMNT_IOSIZE;
1800 args->iosizelog = ffs(iosize) - 1;
1801 } else if (!strcmp(this_char, MNTOPT_IHASHSIZE)) {
1802 if (!value || !*value) {
1803 cmn_err(CE_WARN,
1804 "XFS: %s option requires an argument",
1805 this_char);
1806 return EINVAL;
1807 }
1808 args->flags |= XFSMNT_IHASHSIZE;
1809 args->ihashsize = simple_strtoul(value, &eov, 10);
1810 } else if (!strcmp(this_char, MNTOPT_GRPID) ||
1811 !strcmp(this_char, MNTOPT_BSDGROUPS)) {
1812 vfsp->vfs_flag |= VFS_GRPID;
1813 } else if (!strcmp(this_char, MNTOPT_NOGRPID) ||
1814 !strcmp(this_char, MNTOPT_SYSVGROUPS)) {
1815 vfsp->vfs_flag &= ~VFS_GRPID;
1816 } else if (!strcmp(this_char, MNTOPT_WSYNC)) {
1817 args->flags |= XFSMNT_WSYNC;
1818 } else if (!strcmp(this_char, MNTOPT_OSYNCISOSYNC)) {
1819 args->flags |= XFSMNT_OSYNCISOSYNC;
1820 } else if (!strcmp(this_char, MNTOPT_NORECOVERY)) {
1821 args->flags |= XFSMNT_NORECOVERY;
1822 } else if (!strcmp(this_char, MNTOPT_INO64)) {
1823 args->flags |= XFSMNT_INO64;
1824 #if !XFS_BIG_INUMS
1825 cmn_err(CE_WARN,
1826 "XFS: %s option not allowed on this system",
1827 this_char);
1828 return EINVAL;
1829 #endif
1830 } else if (!strcmp(this_char, MNTOPT_NOALIGN)) {
1831 args->flags |= XFSMNT_NOALIGN;
1832 } else if (!strcmp(this_char, MNTOPT_SWALLOC)) {
1833 args->flags |= XFSMNT_SWALLOC;
1834 } else if (!strcmp(this_char, MNTOPT_SUNIT)) {
1835 if (!value || !*value) {
1836 cmn_err(CE_WARN,
1837 "XFS: %s option requires an argument",
1838 this_char);
1839 return EINVAL;
1840 }
1841 dsunit = simple_strtoul(value, &eov, 10);
1842 } else if (!strcmp(this_char, MNTOPT_SWIDTH)) {
1843 if (!value || !*value) {
1844 cmn_err(CE_WARN,
1845 "XFS: %s option requires an argument",
1846 this_char);
1847 return EINVAL;
1848 }
1849 dswidth = simple_strtoul(value, &eov, 10);
1850 } else if (!strcmp(this_char, MNTOPT_64BITINODE)) {
1851 args->flags &= ~XFSMNT_32BITINODES;
1852 #if !XFS_BIG_INUMS
1853 cmn_err(CE_WARN,
1854 "XFS: %s option not allowed on this system",
1855 this_char);
1856 return EINVAL;
1857 #endif
1858 } else if (!strcmp(this_char, MNTOPT_NOUUID)) {
1859 args->flags |= XFSMNT_NOUUID;
1860 } else if (!strcmp(this_char, MNTOPT_BARRIER)) {
1861 args->flags |= XFSMNT_BARRIER;
1862 } else if (!strcmp(this_char, MNTOPT_NOBARRIER)) {
1863 args->flags &= ~XFSMNT_BARRIER;
1864 } else if (!strcmp(this_char, MNTOPT_IKEEP)) {
1865 args->flags &= ~XFSMNT_IDELETE;
1866 } else if (!strcmp(this_char, MNTOPT_NOIKEEP)) {
1867 args->flags |= XFSMNT_IDELETE;
1868 } else if (!strcmp(this_char, MNTOPT_LARGEIO)) {
1869 args->flags2 &= ~XFSMNT2_COMPAT_IOSIZE;
1870 } else if (!strcmp(this_char, MNTOPT_NOLARGEIO)) {
1871 args->flags2 |= XFSMNT2_COMPAT_IOSIZE;
1872 } else if (!strcmp(this_char, MNTOPT_ATTR2)) {
1873 args->flags |= XFSMNT_ATTR2;
1874 } else if (!strcmp(this_char, MNTOPT_NOATTR2)) {
1875 args->flags &= ~XFSMNT_ATTR2;
1876 } else if (!strcmp(this_char, MNTOPT_FILESTREAM)) {
1877 args->flags2 |= XFSMNT2_FILESTREAMS;
1878 } else if (!strcmp(this_char, "osyncisdsync")) {
1879 /* no-op, this is now the default */
1880 cmn_err(CE_WARN,
1881 "XFS: osyncisdsync is now the default, option is deprecated.");
1882 } else if (!strcmp(this_char, "irixsgid")) {
1883 cmn_err(CE_WARN,
1884 "XFS: irixsgid is now a sysctl(2) variable, option is deprecated.");
1885 } else {
1886 cmn_err(CE_WARN,
1887 "XFS: unknown mount option [%s].", this_char);
1888 return EINVAL;
1889 }
1890 }
1891
1892 if (args->flags & XFSMNT_NORECOVERY) {
1893 if ((vfsp->vfs_flag & VFS_RDONLY) == 0) {
1894 cmn_err(CE_WARN,
1895 "XFS: no-recovery mounts must be read-only.");
1896 return EINVAL;
1897 }
1898 }
1899
1900 if ((args->flags & XFSMNT_NOALIGN) && (dsunit || dswidth)) {
1901 cmn_err(CE_WARN,
1902 "XFS: sunit and swidth options incompatible with the noalign option");
1903 return EINVAL;
1904 }
1905
1906 if ((dsunit && !dswidth) || (!dsunit && dswidth)) {
1907 cmn_err(CE_WARN,
1908 "XFS: sunit and swidth must be specified together");
1909 return EINVAL;
1910 }
1911
1912 if (dsunit && (dswidth % dsunit != 0)) {
1913 cmn_err(CE_WARN,
1914 "XFS: stripe width (%d) must be a multiple of the stripe unit (%d)",
1915 dswidth, dsunit);
1916 return EINVAL;
1917 }
1918
1919 if ((args->flags & XFSMNT_NOALIGN) != XFSMNT_NOALIGN) {
1920 if (dsunit) {
1921 args->sunit = dsunit;
1922 args->flags |= XFSMNT_RETERR;
1923 } else {
1924 args->sunit = vol_dsunit;
1925 }
1926 dswidth ? (args->swidth = dswidth) :
1927 (args->swidth = vol_dswidth);
1928 } else {
1929 args->sunit = args->swidth = 0;
1930 }
1931
1932 done:
1933 if (args->flags & XFSMNT_32BITINODES)
1934 vfsp->vfs_flag |= VFS_32BITINODES;
1935 if (args->flags2)
1936 args->flags |= XFSMNT_FLAGS2;
1937 return 0;
1938 }
1939
1940 STATIC int
1941 xfs_showargs(
1942 struct bhv_desc *bhv,
1943 struct seq_file *m)
1944 {
1945 static struct proc_xfs_info {
1946 int flag;
1947 char *str;
1948 } xfs_info[] = {
1949 /* the few simple ones we can get from the mount struct */
1950 { XFS_MOUNT_WSYNC, "," MNTOPT_WSYNC },
1951 { XFS_MOUNT_INO64, "," MNTOPT_INO64 },
1952 { XFS_MOUNT_NOALIGN, "," MNTOPT_NOALIGN },
1953 { XFS_MOUNT_SWALLOC, "," MNTOPT_SWALLOC },
1954 { XFS_MOUNT_NOUUID, "," MNTOPT_NOUUID },
1955 { XFS_MOUNT_NORECOVERY, "," MNTOPT_NORECOVERY },
1956 { XFS_MOUNT_OSYNCISOSYNC, "," MNTOPT_OSYNCISOSYNC },
1957 { 0, NULL }
1958 };
1959 struct proc_xfs_info *xfs_infop;
1960 struct xfs_mount *mp = XFS_BHVTOM(bhv);
1961 struct bhv_vfs *vfsp = XFS_MTOVFS(mp);
1962
1963 for (xfs_infop = xfs_info; xfs_infop->flag; xfs_infop++) {
1964 if (mp->m_flags & xfs_infop->flag)
1965 seq_puts(m, xfs_infop->str);
1966 }
1967
1968 if (mp->m_flags & XFS_MOUNT_IHASHSIZE)
1969 seq_printf(m, "," MNTOPT_IHASHSIZE "=%d", (int)mp->m_ihsize);
1970
1971 if (mp->m_flags & XFS_MOUNT_DFLT_IOSIZE)
1972 seq_printf(m, "," MNTOPT_ALLOCSIZE "=%dk",
1973 (int)(1 << mp->m_writeio_log) >> 10);
1974
1975 if (mp->m_logbufs > 0)
1976 seq_printf(m, "," MNTOPT_LOGBUFS "=%d", mp->m_logbufs);
1977 if (mp->m_logbsize > 0)
1978 seq_printf(m, "," MNTOPT_LOGBSIZE "=%dk", mp->m_logbsize >> 10);
1979
1980 if (mp->m_logname)
1981 seq_printf(m, "," MNTOPT_LOGDEV "=%s", mp->m_logname);
1982 if (mp->m_rtname)
1983 seq_printf(m, "," MNTOPT_RTDEV "=%s", mp->m_rtname);
1984
1985 if (mp->m_dalign > 0)
1986 seq_printf(m, "," MNTOPT_SUNIT "=%d",
1987 (int)XFS_FSB_TO_BB(mp, mp->m_dalign));
1988 if (mp->m_swidth > 0)
1989 seq_printf(m, "," MNTOPT_SWIDTH "=%d",
1990 (int)XFS_FSB_TO_BB(mp, mp->m_swidth));
1991
1992 if (!(mp->m_flags & XFS_MOUNT_IDELETE))
1993 seq_printf(m, "," MNTOPT_IKEEP);
1994 if (!(mp->m_flags & XFS_MOUNT_COMPAT_IOSIZE))
1995 seq_printf(m, "," MNTOPT_LARGEIO);
1996
1997 if (!(vfsp->vfs_flag & VFS_32BITINODES))
1998 seq_printf(m, "," MNTOPT_64BITINODE);
1999 if (vfsp->vfs_flag & VFS_GRPID)
2000 seq_printf(m, "," MNTOPT_GRPID);
2001
2002 return 0;
2003 }
2004
2005 /*
2006 * Second stage of a freeze. The data is already frozen so we only
2007 * need to take care of themetadata. Once that's done write a dummy
2008 * record to dirty the log in case of a crash while frozen.
2009 */
2010 STATIC void
2011 xfs_freeze(
2012 bhv_desc_t *bdp)
2013 {
2014 xfs_mount_t *mp = XFS_BHVTOM(bdp);
2015
2016 xfs_attr_quiesce(mp);
2017 xfs_fs_log_dummy(mp);
2018 }
2019
2020
2021 bhv_vfsops_t xfs_vfsops = {
2022 BHV_IDENTITY_INIT(VFS_BHV_XFS,VFS_POSITION_XFS),
2023 .vfs_parseargs = xfs_parseargs,
2024 .vfs_showargs = xfs_showargs,
2025 .vfs_mount = xfs_mount,
2026 .vfs_unmount = xfs_unmount,
2027 .vfs_mntupdate = xfs_mntupdate,
2028 .vfs_root = xfs_root,
2029 .vfs_statvfs = xfs_statvfs,
2030 .vfs_sync = xfs_sync,
2031 .vfs_vget = xfs_vget,
2032 .vfs_dmapiops = (vfs_dmapiops_t)fs_nosys,
2033 .vfs_quotactl = (vfs_quotactl_t)fs_nosys,
2034 .vfs_init_vnode = xfs_initialize_vnode,
2035 .vfs_force_shutdown = xfs_do_force_shutdown,
2036 .vfs_freeze = xfs_freeze,
2037 };
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