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x86: remove misleading comments in trampoline_*.S
[wrt350n-kernel.git] / fs / xfs / xfs_vfsops.c
bloba1544597bcd318c7f35a80551321c1f103b55f13
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 #include "xfs_vnodeops.h"
58 #include "xfs_vfsops.h"
59
60
61 int
62 xfs_init(void)
63 {
64 extern kmem_zone_t *xfs_bmap_free_item_zone;
65 extern kmem_zone_t *xfs_btree_cur_zone;
66 extern kmem_zone_t *xfs_trans_zone;
67 extern kmem_zone_t *xfs_buf_item_zone;
68 extern kmem_zone_t *xfs_dabuf_zone;
69 #ifdef XFS_DABUF_DEBUG
70 extern lock_t xfs_dabuf_global_lock;
71 spinlock_init(&xfs_dabuf_global_lock, "xfsda");
72 #endif
73
74 /*
75 * Initialize all of the zone allocators we use.
76 */
77 xfs_bmap_free_item_zone = kmem_zone_init(sizeof(xfs_bmap_free_item_t),
78 "xfs_bmap_free_item");
79 xfs_btree_cur_zone = kmem_zone_init(sizeof(xfs_btree_cur_t),
80 "xfs_btree_cur");
81 xfs_trans_zone = kmem_zone_init(sizeof(xfs_trans_t), "xfs_trans");
82 xfs_da_state_zone =
83 kmem_zone_init(sizeof(xfs_da_state_t), "xfs_da_state");
84 xfs_dabuf_zone = kmem_zone_init(sizeof(xfs_dabuf_t), "xfs_dabuf");
85 xfs_ifork_zone = kmem_zone_init(sizeof(xfs_ifork_t), "xfs_ifork");
86 xfs_acl_zone_init(xfs_acl_zone, "xfs_acl");
87 xfs_mru_cache_init();
88 xfs_filestream_init();
89
90 /*
91 * The size of the zone allocated buf log item is the maximum
92 * size possible under XFS. This wastes a little bit of memory,
93 * but it is much faster.
94 */
95 xfs_buf_item_zone =
96 kmem_zone_init((sizeof(xfs_buf_log_item_t) +
97 (((XFS_MAX_BLOCKSIZE / XFS_BLI_CHUNK) /
98 NBWORD) * sizeof(int))),
99 "xfs_buf_item");
100 xfs_efd_zone =
101 kmem_zone_init((sizeof(xfs_efd_log_item_t) +
102 ((XFS_EFD_MAX_FAST_EXTENTS - 1) *
103 sizeof(xfs_extent_t))),
104 "xfs_efd_item");
105 xfs_efi_zone =
106 kmem_zone_init((sizeof(xfs_efi_log_item_t) +
107 ((XFS_EFI_MAX_FAST_EXTENTS - 1) *
108 sizeof(xfs_extent_t))),
109 "xfs_efi_item");
110
111 /*
112 * These zones warrant special memory allocator hints
113 */
114 xfs_inode_zone =
115 kmem_zone_init_flags(sizeof(xfs_inode_t), "xfs_inode",
116 KM_ZONE_HWALIGN | KM_ZONE_RECLAIM |
117 KM_ZONE_SPREAD, NULL);
118 xfs_ili_zone =
119 kmem_zone_init_flags(sizeof(xfs_inode_log_item_t), "xfs_ili",
120 KM_ZONE_SPREAD, NULL);
121 xfs_icluster_zone =
122 kmem_zone_init_flags(sizeof(xfs_icluster_t), "xfs_icluster",
123 KM_ZONE_SPREAD, NULL);
124
125 /*
126 * Allocate global trace buffers.
127 */
128 #ifdef XFS_ALLOC_TRACE
129 xfs_alloc_trace_buf = ktrace_alloc(XFS_ALLOC_TRACE_SIZE, KM_SLEEP);
130 #endif
131 #ifdef XFS_BMAP_TRACE
132 xfs_bmap_trace_buf = ktrace_alloc(XFS_BMAP_TRACE_SIZE, KM_SLEEP);
133 #endif
134 #ifdef XFS_BMBT_TRACE
135 xfs_bmbt_trace_buf = ktrace_alloc(XFS_BMBT_TRACE_SIZE, KM_SLEEP);
136 #endif
137 #ifdef XFS_ATTR_TRACE
138 xfs_attr_trace_buf = ktrace_alloc(XFS_ATTR_TRACE_SIZE, KM_SLEEP);
139 #endif
140 #ifdef XFS_DIR2_TRACE
141 xfs_dir2_trace_buf = ktrace_alloc(XFS_DIR2_GTRACE_SIZE, KM_SLEEP);
142 #endif
143
144 xfs_dir_startup();
145
146 #if (defined(DEBUG) || defined(INDUCE_IO_ERROR))
147 xfs_error_test_init();
148 #endif /* DEBUG || INDUCE_IO_ERROR */
149
150 xfs_init_procfs();
151 xfs_sysctl_register();
152 return 0;
153 }
154
155 void
156 xfs_cleanup(void)
157 {
158 extern kmem_zone_t *xfs_bmap_free_item_zone;
159 extern kmem_zone_t *xfs_btree_cur_zone;
160 extern kmem_zone_t *xfs_inode_zone;
161 extern kmem_zone_t *xfs_trans_zone;
162 extern kmem_zone_t *xfs_da_state_zone;
163 extern kmem_zone_t *xfs_dabuf_zone;
164 extern kmem_zone_t *xfs_efd_zone;
165 extern kmem_zone_t *xfs_efi_zone;
166 extern kmem_zone_t *xfs_buf_item_zone;
167 extern kmem_zone_t *xfs_icluster_zone;
168
169 xfs_cleanup_procfs();
170 xfs_sysctl_unregister();
171 xfs_refcache_destroy();
172 xfs_filestream_uninit();
173 xfs_mru_cache_uninit();
174 xfs_acl_zone_destroy(xfs_acl_zone);
175
176 #ifdef XFS_DIR2_TRACE
177 ktrace_free(xfs_dir2_trace_buf);
178 #endif
179 #ifdef XFS_ATTR_TRACE
180 ktrace_free(xfs_attr_trace_buf);
181 #endif
182 #ifdef XFS_BMBT_TRACE
183 ktrace_free(xfs_bmbt_trace_buf);
184 #endif
185 #ifdef XFS_BMAP_TRACE
186 ktrace_free(xfs_bmap_trace_buf);
187 #endif
188 #ifdef XFS_ALLOC_TRACE
189 ktrace_free(xfs_alloc_trace_buf);
190 #endif
191
192 kmem_zone_destroy(xfs_bmap_free_item_zone);
193 kmem_zone_destroy(xfs_btree_cur_zone);
194 kmem_zone_destroy(xfs_inode_zone);
195 kmem_zone_destroy(xfs_trans_zone);
196 kmem_zone_destroy(xfs_da_state_zone);
197 kmem_zone_destroy(xfs_dabuf_zone);
198 kmem_zone_destroy(xfs_buf_item_zone);
199 kmem_zone_destroy(xfs_efd_zone);
200 kmem_zone_destroy(xfs_efi_zone);
201 kmem_zone_destroy(xfs_ifork_zone);
202 kmem_zone_destroy(xfs_ili_zone);
203 kmem_zone_destroy(xfs_icluster_zone);
204 }
205
206 /*
207 * xfs_start_flags
208 *
209 * This function fills in xfs_mount_t fields based on mount args.
210 * Note: the superblock has _not_ yet been read in.
211 */
212 STATIC int
213 xfs_start_flags(
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_logbsize = ap->logbufsize;
250 mp->m_fsname_len = strlen(ap->fsname) + 1;
251 mp->m_fsname = kmem_alloc(mp->m_fsname_len, KM_SLEEP);
252 strcpy(mp->m_fsname, ap->fsname);
253 if (ap->rtname[0]) {
254 mp->m_rtname = kmem_alloc(strlen(ap->rtname) + 1, KM_SLEEP);
255 strcpy(mp->m_rtname, ap->rtname);
256 }
257 if (ap->logname[0]) {
258 mp->m_logname = kmem_alloc(strlen(ap->logname) + 1, KM_SLEEP);
259 strcpy(mp->m_logname, ap->logname);
260 }
261
262 if (ap->flags & XFSMNT_WSYNC)
263 mp->m_flags |= XFS_MOUNT_WSYNC;
264 #if XFS_BIG_INUMS
265 if (ap->flags & XFSMNT_INO64) {
266 mp->m_flags |= XFS_MOUNT_INO64;
267 mp->m_inoadd = XFS_INO64_OFFSET;
268 }
269 #endif
270 if (ap->flags & XFSMNT_RETERR)
271 mp->m_flags |= XFS_MOUNT_RETERR;
272 if (ap->flags & XFSMNT_NOALIGN)
273 mp->m_flags |= XFS_MOUNT_NOALIGN;
274 if (ap->flags & XFSMNT_SWALLOC)
275 mp->m_flags |= XFS_MOUNT_SWALLOC;
276 if (ap->flags & XFSMNT_OSYNCISOSYNC)
277 mp->m_flags |= XFS_MOUNT_OSYNCISOSYNC;
278 if (ap->flags & XFSMNT_32BITINODES)
279 mp->m_flags |= XFS_MOUNT_32BITINODES;
280
281 if (ap->flags & XFSMNT_IOSIZE) {
282 if (ap->iosizelog > XFS_MAX_IO_LOG ||
283 ap->iosizelog < XFS_MIN_IO_LOG) {
284 cmn_err(CE_WARN,
285 "XFS: invalid log iosize: %d [not %d-%d]",
286 ap->iosizelog, XFS_MIN_IO_LOG,
287 XFS_MAX_IO_LOG);
288 return XFS_ERROR(EINVAL);
289 }
290
291 mp->m_flags |= XFS_MOUNT_DFLT_IOSIZE;
292 mp->m_readio_log = mp->m_writeio_log = ap->iosizelog;
293 }
294
295 if (ap->flags & XFSMNT_IDELETE)
296 mp->m_flags |= XFS_MOUNT_IDELETE;
297 if (ap->flags & XFSMNT_DIRSYNC)
298 mp->m_flags |= XFS_MOUNT_DIRSYNC;
299 if (ap->flags & XFSMNT_ATTR2)
300 mp->m_flags |= XFS_MOUNT_ATTR2;
301
302 if (ap->flags2 & XFSMNT2_COMPAT_IOSIZE)
303 mp->m_flags |= XFS_MOUNT_COMPAT_IOSIZE;
304
305 /*
306 * no recovery flag requires a read-only mount
307 */
308 if (ap->flags & XFSMNT_NORECOVERY) {
309 if (!(mp->m_flags & XFS_MOUNT_RDONLY)) {
310 cmn_err(CE_WARN,
311 "XFS: tried to mount a FS read-write without recovery!");
312 return XFS_ERROR(EINVAL);
313 }
314 mp->m_flags |= XFS_MOUNT_NORECOVERY;
315 }
316
317 if (ap->flags & XFSMNT_NOUUID)
318 mp->m_flags |= XFS_MOUNT_NOUUID;
319 if (ap->flags & XFSMNT_BARRIER)
320 mp->m_flags |= XFS_MOUNT_BARRIER;
321 else
322 mp->m_flags &= ~XFS_MOUNT_BARRIER;
323
324 if (ap->flags2 & XFSMNT2_FILESTREAMS)
325 mp->m_flags |= XFS_MOUNT_FILESTREAMS;
326
327 if (ap->flags & XFSMNT_DMAPI)
328 mp->m_flags |= XFS_MOUNT_DMAPI;
329 return 0;
330 }
331
332 /*
333 * This function fills in xfs_mount_t fields based on mount args.
334 * Note: the superblock _has_ now been read in.
335 */
336 STATIC int
337 xfs_finish_flags(
338 struct xfs_mount_args *ap,
339 struct xfs_mount *mp)
340 {
341 int ronly = (mp->m_flags & XFS_MOUNT_RDONLY);
342
343 /* Fail a mount where the logbuf is smaller then the log stripe */
344 if (XFS_SB_VERSION_HASLOGV2(&mp->m_sb)) {
345 if ((ap->logbufsize <= 0) &&
346 (mp->m_sb.sb_logsunit > XLOG_BIG_RECORD_BSIZE)) {
347 mp->m_logbsize = mp->m_sb.sb_logsunit;
348 } else if (ap->logbufsize > 0 &&
349 ap->logbufsize < mp->m_sb.sb_logsunit) {
350 cmn_err(CE_WARN,
351 "XFS: logbuf size must be greater than or equal to log stripe size");
352 return XFS_ERROR(EINVAL);
353 }
354 } else {
355 /* Fail a mount if the logbuf is larger than 32K */
356 if (ap->logbufsize > XLOG_BIG_RECORD_BSIZE) {
357 cmn_err(CE_WARN,
358 "XFS: logbuf size for version 1 logs must be 16K or 32K");
359 return XFS_ERROR(EINVAL);
360 }
361 }
362
363 if (XFS_SB_VERSION_HASATTR2(&mp->m_sb)) {
364 mp->m_flags |= XFS_MOUNT_ATTR2;
365 }
366
367 /*
368 * prohibit r/w mounts of read-only filesystems
369 */
370 if ((mp->m_sb.sb_flags & XFS_SBF_READONLY) && !ronly) {
371 cmn_err(CE_WARN,
372 "XFS: cannot mount a read-only filesystem as read-write");
373 return XFS_ERROR(EROFS);
374 }
375
376 /*
377 * check for shared mount.
378 */
379 if (ap->flags & XFSMNT_SHARED) {
380 if (!XFS_SB_VERSION_HASSHARED(&mp->m_sb))
381 return XFS_ERROR(EINVAL);
382
383 /*
384 * For IRIX 6.5, shared mounts must have the shared
385 * version bit set, have the persistent readonly
386 * field set, must be version 0 and can only be mounted
387 * read-only.
388 */
389 if (!ronly || !(mp->m_sb.sb_flags & XFS_SBF_READONLY) ||
390 (mp->m_sb.sb_shared_vn != 0))
391 return XFS_ERROR(EINVAL);
392
393 mp->m_flags |= XFS_MOUNT_SHARED;
394
395 /*
396 * Shared XFS V0 can't deal with DMI. Return EINVAL.
397 */
398 if (mp->m_sb.sb_shared_vn == 0 && (ap->flags & XFSMNT_DMAPI))
399 return XFS_ERROR(EINVAL);
400 }
401
402 if (ap->flags & XFSMNT_UQUOTA) {
403 mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE);
404 if (ap->flags & XFSMNT_UQUOTAENF)
405 mp->m_qflags |= XFS_UQUOTA_ENFD;
406 }
407
408 if (ap->flags & XFSMNT_GQUOTA) {
409 mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE);
410 if (ap->flags & XFSMNT_GQUOTAENF)
411 mp->m_qflags |= XFS_OQUOTA_ENFD;
412 } else if (ap->flags & XFSMNT_PQUOTA) {
413 mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE);
414 if (ap->flags & XFSMNT_PQUOTAENF)
415 mp->m_qflags |= XFS_OQUOTA_ENFD;
416 }
417
418 return 0;
419 }
420
421 /*
422 * xfs_mount
423 *
424 * The file system configurations are:
425 * (1) device (partition) with data and internal log
426 * (2) logical volume with data and log subvolumes.
427 * (3) logical volume with data, log, and realtime subvolumes.
428 *
429 * We only have to handle opening the log and realtime volumes here if
430 * they are present. The data subvolume has already been opened by
431 * get_sb_bdev() and is stored in vfsp->vfs_super->s_bdev.
432 */
433 int
434 xfs_mount(
435 struct xfs_mount *mp,
436 struct xfs_mount_args *args,
437 cred_t *credp)
438 {
439 struct block_device *ddev, *logdev, *rtdev;
440 int flags = 0, error;
441
442 ddev = mp->m_super->s_bdev;
443 logdev = rtdev = NULL;
444
445 error = xfs_dmops_get(mp, args);
446 if (error)
447 return error;
448 error = xfs_qmops_get(mp, args);
449 if (error)
450 return error;
451
452 mp->m_io_ops = xfs_iocore_xfs;
453
454 if (args->flags & XFSMNT_QUIET)
455 flags |= XFS_MFSI_QUIET;
456
457 /*
458 * Open real time and log devices - order is important.
459 */
460 if (args->logname[0]) {
461 error = xfs_blkdev_get(mp, args->logname, &logdev);
462 if (error)
463 return error;
464 }
465 if (args->rtname[0]) {
466 error = xfs_blkdev_get(mp, args->rtname, &rtdev);
467 if (error) {
468 xfs_blkdev_put(logdev);
469 return error;
470 }
471
472 if (rtdev == ddev || rtdev == logdev) {
473 cmn_err(CE_WARN,
474 "XFS: Cannot mount filesystem with identical rtdev and ddev/logdev.");
475 xfs_blkdev_put(logdev);
476 xfs_blkdev_put(rtdev);
477 return EINVAL;
478 }
479 }
480
481 /*
482 * Setup xfs_mount buffer target pointers
483 */
484 error = ENOMEM;
485 mp->m_ddev_targp = xfs_alloc_buftarg(ddev, 0);
486 if (!mp->m_ddev_targp) {
487 xfs_blkdev_put(logdev);
488 xfs_blkdev_put(rtdev);
489 return error;
490 }
491 if (rtdev) {
492 mp->m_rtdev_targp = xfs_alloc_buftarg(rtdev, 1);
493 if (!mp->m_rtdev_targp) {
494 xfs_blkdev_put(logdev);
495 xfs_blkdev_put(rtdev);
496 goto error0;
497 }
498 }
499 mp->m_logdev_targp = (logdev && logdev != ddev) ?
500 xfs_alloc_buftarg(logdev, 1) : mp->m_ddev_targp;
501 if (!mp->m_logdev_targp) {
502 xfs_blkdev_put(logdev);
503 xfs_blkdev_put(rtdev);
504 goto error0;
505 }
506
507 /*
508 * Setup flags based on mount(2) options and then the superblock
509 */
510 error = xfs_start_flags(args, mp);
511 if (error)
512 goto error1;
513 error = xfs_readsb(mp, flags);
514 if (error)
515 goto error1;
516 error = xfs_finish_flags(args, mp);
517 if (error)
518 goto error2;
519
520 /*
521 * Setup xfs_mount buffer target pointers based on superblock
522 */
523 error = xfs_setsize_buftarg(mp->m_ddev_targp, mp->m_sb.sb_blocksize,
524 mp->m_sb.sb_sectsize);
525 if (!error && logdev && logdev != ddev) {
526 unsigned int log_sector_size = BBSIZE;
527
528 if (XFS_SB_VERSION_HASSECTOR(&mp->m_sb))
529 log_sector_size = mp->m_sb.sb_logsectsize;
530 error = xfs_setsize_buftarg(mp->m_logdev_targp,
531 mp->m_sb.sb_blocksize,
532 log_sector_size);
533 }
534 if (!error && rtdev)
535 error = xfs_setsize_buftarg(mp->m_rtdev_targp,
536 mp->m_sb.sb_blocksize,
537 mp->m_sb.sb_sectsize);
538 if (error)
539 goto error2;
540
541 if (mp->m_flags & XFS_MOUNT_BARRIER)
542 xfs_mountfs_check_barriers(mp);
543
544 if ((error = xfs_filestream_mount(mp)))
545 goto error2;
546
547 error = XFS_IOINIT(mp, args, flags);
548 if (error)
549 goto error2;
550
551 XFS_SEND_MOUNT(mp, DM_RIGHT_NULL, args->mtpt, args->fsname);
552
553 return 0;
554
555 error2:
556 if (mp->m_sb_bp)
557 xfs_freesb(mp);
558 error1:
559 xfs_binval(mp->m_ddev_targp);
560 if (logdev && logdev != ddev)
561 xfs_binval(mp->m_logdev_targp);
562 if (rtdev)
563 xfs_binval(mp->m_rtdev_targp);
564 error0:
565 xfs_unmountfs_close(mp, credp);
566 xfs_qmops_put(mp);
567 xfs_dmops_put(mp);
568 return error;
569 }
570
571 int
572 xfs_unmount(
573 xfs_mount_t *mp,
574 int flags,
575 cred_t *credp)
576 {
577 xfs_inode_t *rip;
578 bhv_vnode_t *rvp;
579 int unmount_event_wanted = 0;
580 int unmount_event_flags = 0;
581 int xfs_unmountfs_needed = 0;
582 int error;
583
584 rip = mp->m_rootip;
585 rvp = XFS_ITOV(rip);
586
587 #ifdef HAVE_DMAPI
588 if (mp->m_flags & XFS_MOUNT_DMAPI) {
589 error = XFS_SEND_PREUNMOUNT(mp,
590 rvp, DM_RIGHT_NULL, rvp, DM_RIGHT_NULL,
591 NULL, NULL, 0, 0,
592 (mp->m_dmevmask & (1<<DM_EVENT_PREUNMOUNT))?
593 0:DM_FLAGS_UNWANTED);
594 if (error)
595 return XFS_ERROR(error);
596 unmount_event_wanted = 1;
597 unmount_event_flags = (mp->m_dmevmask & (1<<DM_EVENT_UNMOUNT))?
598 0 : DM_FLAGS_UNWANTED;
599 }
600 #endif
601 /*
602 * First blow any referenced inode from this file system
603 * out of the reference cache, and delete the timer.
604 */
605 xfs_refcache_purge_mp(mp);
606
607 /*
608 * Blow away any referenced inode in the filestreams cache.
609 * This can and will cause log traffic as inodes go inactive
610 * here.
611 */
612 xfs_filestream_unmount(mp);
613
614 XFS_bflush(mp->m_ddev_targp);
615 error = xfs_unmount_flush(mp, 0);
616 if (error)
617 goto out;
618
619 ASSERT(vn_count(rvp) == 1);
620
621 /*
622 * Drop the reference count
623 */
624 VN_RELE(rvp);
625
626 /*
627 * If we're forcing a shutdown, typically because of a media error,
628 * we want to make sure we invalidate dirty pages that belong to
629 * referenced vnodes as well.
630 */
631 if (XFS_FORCED_SHUTDOWN(mp)) {
632 error = xfs_sync(mp, SYNC_WAIT | SYNC_CLOSE);
633 ASSERT(error != EFSCORRUPTED);
634 }
635 xfs_unmountfs_needed = 1;
636
637 out:
638 /* Send DMAPI event, if required.
639 * Then do xfs_unmountfs() if needed.
640 * Then return error (or zero).
641 */
642 if (unmount_event_wanted) {
643 /* Note: mp structure must still exist for
644 * XFS_SEND_UNMOUNT() call.
645 */
646 XFS_SEND_UNMOUNT(mp, error == 0 ? rvp : NULL,
647 DM_RIGHT_NULL, 0, error, unmount_event_flags);
648 }
649 if (xfs_unmountfs_needed) {
650 /*
651 * Call common unmount function to flush to disk
652 * and free the super block buffer & mount structures.
653 */
654 xfs_unmountfs(mp, credp);
655 xfs_qmops_put(mp);
656 xfs_dmops_put(mp);
657 kmem_free(mp, sizeof(xfs_mount_t));
658 }
659
660 return XFS_ERROR(error);
661 }
662
663 STATIC int
664 xfs_quiesce_fs(
665 xfs_mount_t *mp)
666 {
667 int count = 0, pincount;
668
669 xfs_refcache_purge_mp(mp);
670 xfs_flush_buftarg(mp->m_ddev_targp, 0);
671 xfs_finish_reclaim_all(mp, 0);
672
673 /* This loop must run at least twice.
674 * The first instance of the loop will flush
675 * most meta data but that will generate more
676 * meta data (typically directory updates).
677 * Which then must be flushed and logged before
678 * we can write the unmount record.
679 */
680 do {
681 xfs_syncsub(mp, SYNC_INODE_QUIESCE, NULL);
682 pincount = xfs_flush_buftarg(mp->m_ddev_targp, 1);
683 if (!pincount) {
684 delay(50);
685 count++;
686 }
687 } while (count < 2);
688
689 return 0;
690 }
691
692 /*
693 * Second stage of a quiesce. The data is already synced, now we have to take
694 * care of the metadata. New transactions are already blocked, so we need to
695 * wait for any remaining transactions to drain out before proceding.
696 */
697 STATIC void
698 xfs_attr_quiesce(
699 xfs_mount_t *mp)
700 {
701 /* wait for all modifications to complete */
702 while (atomic_read(&mp->m_active_trans) > 0)
703 delay(100);
704
705 /* flush inodes and push all remaining buffers out to disk */
706 xfs_quiesce_fs(mp);
707
708 ASSERT_ALWAYS(atomic_read(&mp->m_active_trans) == 0);
709
710 /* Push the superblock and write an unmount record */
711 xfs_log_sbcount(mp, 1);
712 xfs_log_unmount_write(mp);
713 xfs_unmountfs_writesb(mp);
714 }
715
716 int
717 xfs_mntupdate(
718 struct xfs_mount *mp,
719 int *flags,
720 struct xfs_mount_args *args)
721 {
722 if (!(*flags & MS_RDONLY)) { /* rw/ro -> rw */
723 if (mp->m_flags & XFS_MOUNT_RDONLY)
724 mp->m_flags &= ~XFS_MOUNT_RDONLY;
725 if (args->flags & XFSMNT_BARRIER) {
726 mp->m_flags |= XFS_MOUNT_BARRIER;
727 xfs_mountfs_check_barriers(mp);
728 } else {
729 mp->m_flags &= ~XFS_MOUNT_BARRIER;
730 }
731 } else if (!(mp->m_flags & XFS_MOUNT_RDONLY)) { /* rw -> ro */
732 xfs_filestream_flush(mp);
733 xfs_sync(mp, SYNC_DATA_QUIESCE);
734 xfs_attr_quiesce(mp);
735 mp->m_flags |= XFS_MOUNT_RDONLY;
736 }
737 return 0;
738 }
739
740 /*
741 * xfs_unmount_flush implements a set of flush operation on special
742 * inodes, which are needed as a separate set of operations so that
743 * they can be called as part of relocation process.
744 */
745 int
746 xfs_unmount_flush(
747 xfs_mount_t *mp, /* Mount structure we are getting
748 rid of. */
749 int relocation) /* Called from vfs relocation. */
750 {
751 xfs_inode_t *rip = mp->m_rootip;
752 xfs_inode_t *rbmip;
753 xfs_inode_t *rsumip = NULL;
754 bhv_vnode_t *rvp = XFS_ITOV(rip);
755 int error;
756
757 xfs_ilock(rip, XFS_ILOCK_EXCL | XFS_ILOCK_PARENT);
758 xfs_iflock(rip);
759
760 /*
761 * Flush out the real time inodes.
762 */
763 if ((rbmip = mp->m_rbmip) != NULL) {
764 xfs_ilock(rbmip, XFS_ILOCK_EXCL);
765 xfs_iflock(rbmip);
766 error = xfs_iflush(rbmip, XFS_IFLUSH_SYNC);
767 xfs_iunlock(rbmip, XFS_ILOCK_EXCL);
768
769 if (error == EFSCORRUPTED)
770 goto fscorrupt_out;
771
772 ASSERT(vn_count(XFS_ITOV(rbmip)) == 1);
773
774 rsumip = mp->m_rsumip;
775 xfs_ilock(rsumip, XFS_ILOCK_EXCL);
776 xfs_iflock(rsumip);
777 error = xfs_iflush(rsumip, XFS_IFLUSH_SYNC);
778 xfs_iunlock(rsumip, XFS_ILOCK_EXCL);
779
780 if (error == EFSCORRUPTED)
781 goto fscorrupt_out;
782
783 ASSERT(vn_count(XFS_ITOV(rsumip)) == 1);
784 }
785
786 /*
787 * Synchronously flush root inode to disk
788 */
789 error = xfs_iflush(rip, XFS_IFLUSH_SYNC);
790 if (error == EFSCORRUPTED)
791 goto fscorrupt_out2;
792
793 if (vn_count(rvp) != 1 && !relocation) {
794 xfs_iunlock(rip, XFS_ILOCK_EXCL);
795 return XFS_ERROR(EBUSY);
796 }
797
798 /*
799 * Release dquot that rootinode, rbmino and rsumino might be holding,
800 * flush and purge the quota inodes.
801 */
802 error = XFS_QM_UNMOUNT(mp);
803 if (error == EFSCORRUPTED)
804 goto fscorrupt_out2;
805
806 if (rbmip) {
807 VN_RELE(XFS_ITOV(rbmip));
808 VN_RELE(XFS_ITOV(rsumip));
809 }
810
811 xfs_iunlock(rip, XFS_ILOCK_EXCL);
812 return 0;
813
814 fscorrupt_out:
815 xfs_ifunlock(rip);
816
817 fscorrupt_out2:
818 xfs_iunlock(rip, XFS_ILOCK_EXCL);
819
820 return XFS_ERROR(EFSCORRUPTED);
821 }
822
823 /*
824 * xfs_root extracts the root vnode from a vfs.
825 *
826 * vfsp -- the vfs struct for the desired file system
827 * vpp -- address of the caller's vnode pointer which should be
828 * set to the desired fs root vnode
829 */
830 int
831 xfs_root(
832 xfs_mount_t *mp,
833 bhv_vnode_t **vpp)
834 {
835 bhv_vnode_t *vp;
836
837 vp = XFS_ITOV(mp->m_rootip);
838 VN_HOLD(vp);
839 *vpp = vp;
840 return 0;
841 }
842
843 /*
844 * xfs_statvfs
845 *
846 * Fill in the statvfs structure for the given file system. We use
847 * the superblock lock in the mount structure to ensure a consistent
848 * snapshot of the counters returned.
849 */
850 int
851 xfs_statvfs(
852 xfs_mount_t *mp,
853 bhv_statvfs_t *statp,
854 bhv_vnode_t *vp)
855 {
856 __uint64_t fakeinos;
857 xfs_extlen_t lsize;
858 xfs_sb_t *sbp;
859 unsigned long s;
860
861 sbp = &(mp->m_sb);
862
863 statp->f_type = XFS_SB_MAGIC;
864
865 xfs_icsb_sync_counters_flags(mp, XFS_ICSB_LAZY_COUNT);
866 s = XFS_SB_LOCK(mp);
867 statp->f_bsize = sbp->sb_blocksize;
868 lsize = sbp->sb_logstart ? sbp->sb_logblocks : 0;
869 statp->f_blocks = sbp->sb_dblocks - lsize;
870 statp->f_bfree = statp->f_bavail =
871 sbp->sb_fdblocks - XFS_ALLOC_SET_ASIDE(mp);
872 fakeinos = statp->f_bfree << sbp->sb_inopblog;
873 #if XFS_BIG_INUMS
874 fakeinos += mp->m_inoadd;
875 #endif
876 statp->f_files =
877 MIN(sbp->sb_icount + fakeinos, (__uint64_t)XFS_MAXINUMBER);
878 if (mp->m_maxicount)
879 #if XFS_BIG_INUMS
880 if (!mp->m_inoadd)
881 #endif
882 statp->f_files = min_t(typeof(statp->f_files),
883 statp->f_files,
884 mp->m_maxicount);
885 statp->f_ffree = statp->f_files - (sbp->sb_icount - sbp->sb_ifree);
886 XFS_SB_UNLOCK(mp, s);
887
888 xfs_statvfs_fsid(statp, mp);
889 statp->f_namelen = MAXNAMELEN - 1;
890
891 if (vp)
892 XFS_QM_DQSTATVFS(xfs_vtoi(vp), statp);
893 return 0;
894 }
895
896
897 /*
898 * xfs_sync flushes any pending I/O to file system vfsp.
899 *
900 * This routine is called by vfs_sync() to make sure that things make it
901 * out to disk eventually, on sync() system calls to flush out everything,
902 * and when the file system is unmounted. For the vfs_sync() case, all
903 * we really need to do is sync out the log to make all of our meta-data
904 * updates permanent (except for timestamps). For calls from pflushd(),
905 * dirty pages are kept moving by calling pdflush() on the inodes
906 * containing them. We also flush the inodes that we can lock without
907 * sleeping and the superblock if we can lock it without sleeping from
908 * vfs_sync() so that items at the tail of the log are always moving out.
909 *
910 * Flags:
911 * SYNC_BDFLUSH - We're being called from vfs_sync() so we don't want
912 * to sleep if we can help it. All we really need
913 * to do is ensure that the log is synced at least
914 * periodically. We also push the inodes and
915 * superblock if we can lock them without sleeping
916 * and they are not pinned.
917 * SYNC_ATTR - We need to flush the inodes. If SYNC_BDFLUSH is not
918 * set, then we really want to lock each inode and flush
919 * it.
920 * SYNC_WAIT - All the flushes that take place in this call should
921 * be synchronous.
922 * SYNC_DELWRI - This tells us to push dirty pages associated with
923 * inodes. SYNC_WAIT and SYNC_BDFLUSH are used to
924 * determine if they should be flushed sync, async, or
925 * delwri.
926 * SYNC_CLOSE - This flag is passed when the system is being
927 * unmounted. We should sync and invalidate everything.
928 * SYNC_FSDATA - This indicates that the caller would like to make
929 * sure the superblock is safe on disk. We can ensure
930 * this by simply making sure the log gets flushed
931 * if SYNC_BDFLUSH is set, and by actually writing it
932 * out otherwise.
933 * SYNC_IOWAIT - The caller wants us to wait for all data I/O to complete
934 * before we return (including direct I/O). Forms the drain
935 * side of the write barrier needed to safely quiesce the
936 * filesystem.
937 *
938 */
939 int
940 xfs_sync(
941 xfs_mount_t *mp,
942 int flags)
943 {
944 int error;
945
946 /*
947 * Get the Quota Manager to flush the dquots.
948 *
949 * If XFS quota support is not enabled or this filesystem
950 * instance does not use quotas XFS_QM_DQSYNC will always
951 * return zero.
952 */
953 error = XFS_QM_DQSYNC(mp, flags);
954 if (error) {
955 /*
956 * If we got an IO error, we will be shutting down.
957 * So, there's nothing more for us to do here.
958 */
959 ASSERT(error != EIO || XFS_FORCED_SHUTDOWN(mp));
960 if (XFS_FORCED_SHUTDOWN(mp))
961 return XFS_ERROR(error);
962 }
963
964 if (flags & SYNC_IOWAIT)
965 xfs_filestream_flush(mp);
966
967 return xfs_syncsub(mp, flags, NULL);
968 }
969
970 /*
971 * xfs sync routine for internal use
972 *
973 * This routine supports all of the flags defined for the generic vfs_sync
974 * interface as explained above under xfs_sync.
975 *
976 */
977 int
978 xfs_sync_inodes(
979 xfs_mount_t *mp,
980 int flags,
981 int *bypassed)
982 {
983 xfs_inode_t *ip = NULL;
984 xfs_inode_t *ip_next;
985 xfs_buf_t *bp;
986 bhv_vnode_t *vp = NULL;
987 int error;
988 int last_error;
989 uint64_t fflag;
990 uint lock_flags;
991 uint base_lock_flags;
992 boolean_t mount_locked;
993 boolean_t vnode_refed;
994 int preempt;
995 xfs_dinode_t *dip;
996 xfs_iptr_t *ipointer;
997 #ifdef DEBUG
998 boolean_t ipointer_in = B_FALSE;
999
1000 #define IPOINTER_SET ipointer_in = B_TRUE
1001 #define IPOINTER_CLR ipointer_in = B_FALSE
1002 #else
1003 #define IPOINTER_SET
1004 #define IPOINTER_CLR
1005 #endif
1006
1007
1008 /* Insert a marker record into the inode list after inode ip. The list
1009 * must be locked when this is called. After the call the list will no
1010 * longer be locked.
1011 */
1012 #define IPOINTER_INSERT(ip, mp) { \
1013 ASSERT(ipointer_in == B_FALSE); \
1014 ipointer->ip_mnext = ip->i_mnext; \
1015 ipointer->ip_mprev = ip; \
1016 ip->i_mnext = (xfs_inode_t *)ipointer; \
1017 ipointer->ip_mnext->i_mprev = (xfs_inode_t *)ipointer; \
1018 preempt = 0; \
1019 XFS_MOUNT_IUNLOCK(mp); \
1020 mount_locked = B_FALSE; \
1021 IPOINTER_SET; \
1022 }
1023
1024 /* Remove the marker from the inode list. If the marker was the only item
1025 * in the list then there are no remaining inodes and we should zero out
1026 * the whole list. If we are the current head of the list then move the head
1027 * past us.
1028 */
1029 #define IPOINTER_REMOVE(ip, mp) { \
1030 ASSERT(ipointer_in == B_TRUE); \
1031 if (ipointer->ip_mnext != (xfs_inode_t *)ipointer) { \
1032 ip = ipointer->ip_mnext; \
1033 ip->i_mprev = ipointer->ip_mprev; \
1034 ipointer->ip_mprev->i_mnext = ip; \
1035 if (mp->m_inodes == (xfs_inode_t *)ipointer) { \
1036 mp->m_inodes = ip; \
1037 } \
1038 } else { \
1039 ASSERT(mp->m_inodes == (xfs_inode_t *)ipointer); \
1040 mp->m_inodes = NULL; \
1041 ip = NULL; \
1042 } \
1043 IPOINTER_CLR; \
1044 }
1045
1046 #define XFS_PREEMPT_MASK 0x7f
1047
1048 if (bypassed)
1049 *bypassed = 0;
1050 if (mp->m_flags & XFS_MOUNT_RDONLY)
1051 return 0;
1052 error = 0;
1053 last_error = 0;
1054 preempt = 0;
1055
1056 /* Allocate a reference marker */
1057 ipointer = (xfs_iptr_t *)kmem_zalloc(sizeof(xfs_iptr_t), KM_SLEEP);
1058
1059 fflag = XFS_B_ASYNC; /* default is don't wait */
1060 if (flags & (SYNC_BDFLUSH | SYNC_DELWRI))
1061 fflag = XFS_B_DELWRI;
1062 if (flags & SYNC_WAIT)
1063 fflag = 0; /* synchronous overrides all */
1064
1065 base_lock_flags = XFS_ILOCK_SHARED;
1066 if (flags & (SYNC_DELWRI | SYNC_CLOSE)) {
1067 /*
1068 * We need the I/O lock if we're going to call any of
1069 * the flush/inval routines.
1070 */
1071 base_lock_flags |= XFS_IOLOCK_SHARED;
1072 }
1073
1074 XFS_MOUNT_ILOCK(mp);
1075
1076 ip = mp->m_inodes;
1077
1078 mount_locked = B_TRUE;
1079 vnode_refed = B_FALSE;
1080
1081 IPOINTER_CLR;
1082
1083 do {
1084 ASSERT(ipointer_in == B_FALSE);
1085 ASSERT(vnode_refed == B_FALSE);
1086
1087 lock_flags = base_lock_flags;
1088
1089 /*
1090 * There were no inodes in the list, just break out
1091 * of the loop.
1092 */
1093 if (ip == NULL) {
1094 break;
1095 }
1096
1097 /*
1098 * We found another sync thread marker - skip it
1099 */
1100 if (ip->i_mount == NULL) {
1101 ip = ip->i_mnext;
1102 continue;
1103 }
1104
1105 vp = XFS_ITOV_NULL(ip);
1106
1107 /*
1108 * If the vnode is gone then this is being torn down,
1109 * call reclaim if it is flushed, else let regular flush
1110 * code deal with it later in the loop.
1111 */
1112
1113 if (vp == NULL) {
1114 /* Skip ones already in reclaim */
1115 if (ip->i_flags & XFS_IRECLAIM) {
1116 ip = ip->i_mnext;
1117 continue;
1118 }
1119 if (xfs_ilock_nowait(ip, XFS_ILOCK_EXCL) == 0) {
1120 ip = ip->i_mnext;
1121 } else if ((xfs_ipincount(ip) == 0) &&
1122 xfs_iflock_nowait(ip)) {
1123 IPOINTER_INSERT(ip, mp);
1124
1125 xfs_finish_reclaim(ip, 1,
1126 XFS_IFLUSH_DELWRI_ELSE_ASYNC);
1127
1128 XFS_MOUNT_ILOCK(mp);
1129 mount_locked = B_TRUE;
1130 IPOINTER_REMOVE(ip, mp);
1131 } else {
1132 xfs_iunlock(ip, XFS_ILOCK_EXCL);
1133 ip = ip->i_mnext;
1134 }
1135 continue;
1136 }
1137
1138 if (VN_BAD(vp)) {
1139 ip = ip->i_mnext;
1140 continue;
1141 }
1142
1143 if (XFS_FORCED_SHUTDOWN(mp) && !(flags & SYNC_CLOSE)) {
1144 XFS_MOUNT_IUNLOCK(mp);
1145 kmem_free(ipointer, sizeof(xfs_iptr_t));
1146 return 0;
1147 }
1148
1149 /*
1150 * If this is just vfs_sync() or pflushd() calling
1151 * then we can skip inodes for which it looks like
1152 * there is nothing to do. Since we don't have the
1153 * inode locked this is racy, but these are periodic
1154 * calls so it doesn't matter. For the others we want
1155 * to know for sure, so we at least try to lock them.
1156 */
1157 if (flags & SYNC_BDFLUSH) {
1158 if (((ip->i_itemp == NULL) ||
1159 !(ip->i_itemp->ili_format.ilf_fields &
1160 XFS_ILOG_ALL)) &&
1161 (ip->i_update_core == 0)) {
1162 ip = ip->i_mnext;
1163 continue;
1164 }
1165 }
1166
1167 /*
1168 * Try to lock without sleeping. We're out of order with
1169 * the inode list lock here, so if we fail we need to drop
1170 * the mount lock and try again. If we're called from
1171 * bdflush() here, then don't bother.
1172 *
1173 * The inode lock here actually coordinates with the
1174 * almost spurious inode lock in xfs_ireclaim() to prevent
1175 * the vnode we handle here without a reference from
1176 * being freed while we reference it. If we lock the inode
1177 * while it's on the mount list here, then the spurious inode
1178 * lock in xfs_ireclaim() after the inode is pulled from
1179 * the mount list will sleep until we release it here.
1180 * This keeps the vnode from being freed while we reference
1181 * it.
1182 */
1183 if (xfs_ilock_nowait(ip, lock_flags) == 0) {
1184 if ((flags & SYNC_BDFLUSH) || (vp == NULL)) {
1185 ip = ip->i_mnext;
1186 continue;
1187 }
1188
1189 vp = vn_grab(vp);
1190 if (vp == NULL) {
1191 ip = ip->i_mnext;
1192 continue;
1193 }
1194
1195 IPOINTER_INSERT(ip, mp);
1196 xfs_ilock(ip, lock_flags);
1197
1198 ASSERT(vp == XFS_ITOV(ip));
1199 ASSERT(ip->i_mount == mp);
1200
1201 vnode_refed = B_TRUE;
1202 }
1203
1204 /* From here on in the loop we may have a marker record
1205 * in the inode list.
1206 */
1207
1208 /*
1209 * If we have to flush data or wait for I/O completion
1210 * we need to drop the ilock that we currently hold.
1211 * If we need to drop the lock, insert a marker if we
1212 * have not already done so.
1213 */
1214 if ((flags & (SYNC_CLOSE|SYNC_IOWAIT)) ||
1215 ((flags & SYNC_DELWRI) && VN_DIRTY(vp))) {
1216 if (mount_locked) {
1217 IPOINTER_INSERT(ip, mp);
1218 }
1219 xfs_iunlock(ip, XFS_ILOCK_SHARED);
1220
1221 if (flags & SYNC_CLOSE) {
1222 /* Shutdown case. Flush and invalidate. */
1223 if (XFS_FORCED_SHUTDOWN(mp))
1224 xfs_tosspages(ip, 0, -1,
1225 FI_REMAPF);
1226 else
1227 error = xfs_flushinval_pages(ip,
1228 0, -1, FI_REMAPF);
1229 } else if ((flags & SYNC_DELWRI) && VN_DIRTY(vp)) {
1230 error = xfs_flush_pages(ip, 0,
1231 -1, fflag, FI_NONE);
1232 }
1233
1234 /*
1235 * When freezing, we need to wait ensure all I/O (including direct
1236 * I/O) is complete to ensure no further data modification can take
1237 * place after this point
1238 */
1239 if (flags & SYNC_IOWAIT)
1240 vn_iowait(ip);
1241
1242 xfs_ilock(ip, XFS_ILOCK_SHARED);
1243 }
1244
1245 if (flags & SYNC_BDFLUSH) {
1246 if ((flags & SYNC_ATTR) &&
1247 ((ip->i_update_core) ||
1248 ((ip->i_itemp != NULL) &&
1249 (ip->i_itemp->ili_format.ilf_fields != 0)))) {
1250
1251 /* Insert marker and drop lock if not already
1252 * done.
1253 */
1254 if (mount_locked) {
1255 IPOINTER_INSERT(ip, mp);
1256 }
1257
1258 /*
1259 * We don't want the periodic flushing of the
1260 * inodes by vfs_sync() to interfere with
1261 * I/O to the file, especially read I/O
1262 * where it is only the access time stamp
1263 * that is being flushed out. To prevent
1264 * long periods where we have both inode
1265 * locks held shared here while reading the
1266 * inode's buffer in from disk, we drop the
1267 * inode lock while reading in the inode
1268 * buffer. We have to release the buffer
1269 * and reacquire the inode lock so that they
1270 * are acquired in the proper order (inode
1271 * locks first). The buffer will go at the
1272 * end of the lru chain, though, so we can
1273 * expect it to still be there when we go
1274 * for it again in xfs_iflush().
1275 */
1276 if ((xfs_ipincount(ip) == 0) &&
1277 xfs_iflock_nowait(ip)) {
1278
1279 xfs_ifunlock(ip);
1280 xfs_iunlock(ip, XFS_ILOCK_SHARED);
1281
1282 error = xfs_itobp(mp, NULL, ip,
1283 &dip, &bp, 0, 0);
1284 if (!error) {
1285 xfs_buf_relse(bp);
1286 } else {
1287 /* Bailing out, remove the
1288 * marker and free it.
1289 */
1290 XFS_MOUNT_ILOCK(mp);
1291 IPOINTER_REMOVE(ip, mp);
1292 XFS_MOUNT_IUNLOCK(mp);
1293
1294 ASSERT(!(lock_flags &
1295 XFS_IOLOCK_SHARED));
1296
1297 kmem_free(ipointer,
1298 sizeof(xfs_iptr_t));
1299 return (0);
1300 }
1301
1302 /*
1303 * Since we dropped the inode lock,
1304 * the inode may have been reclaimed.
1305 * Therefore, we reacquire the mount
1306 * lock and check to see if we were the
1307 * inode reclaimed. If this happened
1308 * then the ipointer marker will no
1309 * longer point back at us. In this
1310 * case, move ip along to the inode
1311 * after the marker, remove the marker
1312 * and continue.
1313 */
1314 XFS_MOUNT_ILOCK(mp);
1315 mount_locked = B_TRUE;
1316
1317 if (ip != ipointer->ip_mprev) {
1318 IPOINTER_REMOVE(ip, mp);
1319
1320 ASSERT(!vnode_refed);
1321 ASSERT(!(lock_flags &
1322 XFS_IOLOCK_SHARED));
1323 continue;
1324 }
1325
1326 ASSERT(ip->i_mount == mp);
1327
1328 if (xfs_ilock_nowait(ip,
1329 XFS_ILOCK_SHARED) == 0) {
1330 ASSERT(ip->i_mount == mp);
1331 /*
1332 * We failed to reacquire
1333 * the inode lock without
1334 * sleeping, so just skip
1335 * the inode for now. We
1336 * clear the ILOCK bit from
1337 * the lock_flags so that we
1338 * won't try to drop a lock
1339 * we don't hold below.
1340 */
1341 lock_flags &= ~XFS_ILOCK_SHARED;
1342 IPOINTER_REMOVE(ip_next, mp);
1343 } else if ((xfs_ipincount(ip) == 0) &&
1344 xfs_iflock_nowait(ip)) {
1345 ASSERT(ip->i_mount == mp);
1346 /*
1347 * Since this is vfs_sync()
1348 * calling we only flush the
1349 * inode out if we can lock
1350 * it without sleeping and
1351 * it is not pinned. Drop
1352 * the mount lock here so
1353 * that we don't hold it for
1354 * too long. We already have
1355 * a marker in the list here.
1356 */
1357 XFS_MOUNT_IUNLOCK(mp);
1358 mount_locked = B_FALSE;
1359 error = xfs_iflush(ip,
1360 XFS_IFLUSH_DELWRI);
1361 } else {
1362 ASSERT(ip->i_mount == mp);
1363 IPOINTER_REMOVE(ip_next, mp);
1364 }
1365 }
1366
1367 }
1368
1369 } else {
1370 if ((flags & SYNC_ATTR) &&
1371 ((ip->i_update_core) ||
1372 ((ip->i_itemp != NULL) &&
1373 (ip->i_itemp->ili_format.ilf_fields != 0)))) {
1374 if (mount_locked) {
1375 IPOINTER_INSERT(ip, mp);
1376 }
1377
1378 if (flags & SYNC_WAIT) {
1379 xfs_iflock(ip);
1380 error = xfs_iflush(ip,
1381 XFS_IFLUSH_SYNC);
1382 } else {
1383 /*
1384 * If we can't acquire the flush
1385 * lock, then the inode is already
1386 * being flushed so don't bother
1387 * waiting. If we can lock it then
1388 * do a delwri flush so we can
1389 * combine multiple inode flushes
1390 * in each disk write.
1391 */
1392 if (xfs_iflock_nowait(ip)) {
1393 error = xfs_iflush(ip,
1394 XFS_IFLUSH_DELWRI);
1395 }
1396 else if (bypassed)
1397 (*bypassed)++;
1398 }
1399 }
1400 }
1401
1402 if (lock_flags != 0) {
1403 xfs_iunlock(ip, lock_flags);
1404 }
1405
1406 if (vnode_refed) {
1407 /*
1408 * If we had to take a reference on the vnode
1409 * above, then wait until after we've unlocked
1410 * the inode to release the reference. This is
1411 * because we can be already holding the inode
1412 * lock when VN_RELE() calls xfs_inactive().
1413 *
1414 * Make sure to drop the mount lock before calling
1415 * VN_RELE() so that we don't trip over ourselves if
1416 * we have to go for the mount lock again in the
1417 * inactive code.
1418 */
1419 if (mount_locked) {
1420 IPOINTER_INSERT(ip, mp);
1421 }
1422
1423 VN_RELE(vp);
1424
1425 vnode_refed = B_FALSE;
1426 }
1427
1428 if (error) {
1429 last_error = error;
1430 }
1431
1432 /*
1433 * bail out if the filesystem is corrupted.
1434 */
1435 if (error == EFSCORRUPTED) {
1436 if (!mount_locked) {
1437 XFS_MOUNT_ILOCK(mp);
1438 IPOINTER_REMOVE(ip, mp);
1439 }
1440 XFS_MOUNT_IUNLOCK(mp);
1441 ASSERT(ipointer_in == B_FALSE);
1442 kmem_free(ipointer, sizeof(xfs_iptr_t));
1443 return XFS_ERROR(error);
1444 }
1445
1446 /* Let other threads have a chance at the mount lock
1447 * if we have looped many times without dropping the
1448 * lock.
1449 */
1450 if ((++preempt & XFS_PREEMPT_MASK) == 0) {
1451 if (mount_locked) {
1452 IPOINTER_INSERT(ip, mp);
1453 }
1454 }
1455
1456 if (mount_locked == B_FALSE) {
1457 XFS_MOUNT_ILOCK(mp);
1458 mount_locked = B_TRUE;
1459 IPOINTER_REMOVE(ip, mp);
1460 continue;
1461 }
1462
1463 ASSERT(ipointer_in == B_FALSE);
1464 ip = ip->i_mnext;
1465
1466 } while (ip != mp->m_inodes);
1467
1468 XFS_MOUNT_IUNLOCK(mp);
1469
1470 ASSERT(ipointer_in == B_FALSE);
1471
1472 kmem_free(ipointer, sizeof(xfs_iptr_t));
1473 return XFS_ERROR(last_error);
1474 }
1475
1476 /*
1477 * xfs sync routine for internal use
1478 *
1479 * This routine supports all of the flags defined for the generic vfs_sync
1480 * interface as explained above under xfs_sync.
1481 *
1482 */
1483 int
1484 xfs_syncsub(
1485 xfs_mount_t *mp,
1486 int flags,
1487 int *bypassed)
1488 {
1489 int error = 0;
1490 int last_error = 0;
1491 uint log_flags = XFS_LOG_FORCE;
1492 xfs_buf_t *bp;
1493 xfs_buf_log_item_t *bip;
1494
1495 /*
1496 * Sync out the log. This ensures that the log is periodically
1497 * flushed even if there is not enough activity to fill it up.
1498 */
1499 if (flags & SYNC_WAIT)
1500 log_flags |= XFS_LOG_SYNC;
1501
1502 xfs_log_force(mp, (xfs_lsn_t)0, log_flags);
1503
1504 if (flags & (SYNC_ATTR|SYNC_DELWRI)) {
1505 if (flags & SYNC_BDFLUSH)
1506 xfs_finish_reclaim_all(mp, 1);
1507 else
1508 error = xfs_sync_inodes(mp, flags, bypassed);
1509 }
1510
1511 /*
1512 * Flushing out dirty data above probably generated more
1513 * log activity, so if this isn't vfs_sync() then flush
1514 * the log again.
1515 */
1516 if (flags & SYNC_DELWRI) {
1517 xfs_log_force(mp, (xfs_lsn_t)0, log_flags);
1518 }
1519
1520 if (flags & SYNC_FSDATA) {
1521 /*
1522 * If this is vfs_sync() then only sync the superblock
1523 * if we can lock it without sleeping and it is not pinned.
1524 */
1525 if (flags & SYNC_BDFLUSH) {
1526 bp = xfs_getsb(mp, XFS_BUF_TRYLOCK);
1527 if (bp != NULL) {
1528 bip = XFS_BUF_FSPRIVATE(bp,xfs_buf_log_item_t*);
1529 if ((bip != NULL) &&
1530 xfs_buf_item_dirty(bip)) {
1531 if (!(XFS_BUF_ISPINNED(bp))) {
1532 XFS_BUF_ASYNC(bp);
1533 error = xfs_bwrite(mp, bp);
1534 } else {
1535 xfs_buf_relse(bp);
1536 }
1537 } else {
1538 xfs_buf_relse(bp);
1539 }
1540 }
1541 } else {
1542 bp = xfs_getsb(mp, 0);
1543 /*
1544 * If the buffer is pinned then push on the log so
1545 * we won't get stuck waiting in the write for
1546 * someone, maybe ourselves, to flush the log.
1547 * Even though we just pushed the log above, we
1548 * did not have the superblock buffer locked at
1549 * that point so it can become pinned in between
1550 * there and here.
1551 */
1552 if (XFS_BUF_ISPINNED(bp))
1553 xfs_log_force(mp, (xfs_lsn_t)0, XFS_LOG_FORCE);
1554 if (flags & SYNC_WAIT)
1555 XFS_BUF_UNASYNC(bp);
1556 else
1557 XFS_BUF_ASYNC(bp);
1558 error = xfs_bwrite(mp, bp);
1559 }
1560 if (error) {
1561 last_error = error;
1562 }
1563 }
1564
1565 /*
1566 * If this is the periodic sync, then kick some entries out of
1567 * the reference cache. This ensures that idle entries are
1568 * eventually kicked out of the cache.
1569 */
1570 if (flags & SYNC_REFCACHE) {
1571 if (flags & SYNC_WAIT)
1572 xfs_refcache_purge_mp(mp);
1573 else
1574 xfs_refcache_purge_some(mp);
1575 }
1576
1577 /*
1578 * If asked, update the disk superblock with incore counter values if we
1579 * are using non-persistent counters so that they don't get too far out
1580 * of sync if we crash or get a forced shutdown. We don't want to force
1581 * this to disk, just get a transaction into the iclogs....
1582 */
1583 if (flags & SYNC_SUPER)
1584 xfs_log_sbcount(mp, 0);
1585
1586 /*
1587 * Now check to see if the log needs a "dummy" transaction.
1588 */
1589
1590 if (!(flags & SYNC_REMOUNT) && xfs_log_need_covered(mp)) {
1591 xfs_trans_t *tp;
1592 xfs_inode_t *ip;
1593
1594 /*
1595 * Put a dummy transaction in the log to tell
1596 * recovery that all others are OK.
1597 */
1598 tp = xfs_trans_alloc(mp, XFS_TRANS_DUMMY1);
1599 if ((error = xfs_trans_reserve(tp, 0,
1600 XFS_ICHANGE_LOG_RES(mp),
1601 0, 0, 0))) {
1602 xfs_trans_cancel(tp, 0);
1603 return error;
1604 }
1605
1606 ip = mp->m_rootip;
1607 xfs_ilock(ip, XFS_ILOCK_EXCL);
1608
1609 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
1610 xfs_trans_ihold(tp, ip);
1611 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1612 error = xfs_trans_commit(tp, 0);
1613 xfs_iunlock(ip, XFS_ILOCK_EXCL);
1614 xfs_log_force(mp, (xfs_lsn_t)0, log_flags);
1615 }
1616
1617 /*
1618 * When shutting down, we need to insure that the AIL is pushed
1619 * to disk or the filesystem can appear corrupt from the PROM.
1620 */
1621 if ((flags & (SYNC_CLOSE|SYNC_WAIT)) == (SYNC_CLOSE|SYNC_WAIT)) {
1622 XFS_bflush(mp->m_ddev_targp);
1623 if (mp->m_rtdev_targp) {
1624 XFS_bflush(mp->m_rtdev_targp);
1625 }
1626 }
1627
1628 return XFS_ERROR(last_error);
1629 }
1630
1631 /*
1632 * xfs_vget - called by DMAPI and NFSD to get vnode from file handle
1633 */
1634 int
1635 xfs_vget(
1636 xfs_mount_t *mp,
1637 bhv_vnode_t **vpp,
1638 xfs_fid_t *xfid)
1639 {
1640 xfs_inode_t *ip;
1641 int error;
1642 xfs_ino_t ino;
1643 unsigned int igen;
1644
1645 /*
1646 * Invalid. Since handles can be created in user space and passed in
1647 * via gethandle(), this is not cause for a panic.
1648 */
1649 if (xfid->fid_len != sizeof(*xfid) - sizeof(xfid->fid_len))
1650 return XFS_ERROR(EINVAL);
1651
1652 ino = xfid->fid_ino;
1653 igen = xfid->fid_gen;
1654
1655 /*
1656 * NFS can sometimes send requests for ino 0. Fail them gracefully.
1657 */
1658 if (ino == 0)
1659 return XFS_ERROR(ESTALE);
1660
1661 error = xfs_iget(mp, NULL, ino, 0, XFS_ILOCK_SHARED, &ip, 0);
1662 if (error) {
1663 *vpp = NULL;
1664 return error;
1665 }
1666
1667 if (ip == NULL) {
1668 *vpp = NULL;
1669 return XFS_ERROR(EIO);
1670 }
1671
1672 if (ip->i_d.di_mode == 0 || ip->i_d.di_gen != igen) {
1673 xfs_iput_new(ip, XFS_ILOCK_SHARED);
1674 *vpp = NULL;
1675 return XFS_ERROR(ENOENT);
1676 }
1677
1678 *vpp = XFS_ITOV(ip);
1679 xfs_iunlock(ip, XFS_ILOCK_SHARED);
1680 return 0;
1681 }
1682
1683
1684 #define MNTOPT_LOGBUFS "logbufs" /* number of XFS log buffers */
1685 #define MNTOPT_LOGBSIZE "logbsize" /* size of XFS log buffers */
1686 #define MNTOPT_LOGDEV "logdev" /* log device */
1687 #define MNTOPT_RTDEV "rtdev" /* realtime I/O device */
1688 #define MNTOPT_BIOSIZE "biosize" /* log2 of preferred buffered io size */
1689 #define MNTOPT_WSYNC "wsync" /* safe-mode nfs compatible mount */
1690 #define MNTOPT_INO64 "ino64" /* force inodes into 64-bit range */
1691 #define MNTOPT_NOALIGN "noalign" /* turn off stripe alignment */
1692 #define MNTOPT_SWALLOC "swalloc" /* turn on stripe width allocation */
1693 #define MNTOPT_SUNIT "sunit" /* data volume stripe unit */
1694 #define MNTOPT_SWIDTH "swidth" /* data volume stripe width */
1695 #define MNTOPT_NOUUID "nouuid" /* ignore filesystem UUID */
1696 #define MNTOPT_MTPT "mtpt" /* filesystem mount point */
1697 #define MNTOPT_GRPID "grpid" /* group-ID from parent directory */
1698 #define MNTOPT_NOGRPID "nogrpid" /* group-ID from current process */
1699 #define MNTOPT_BSDGROUPS "bsdgroups" /* group-ID from parent directory */
1700 #define MNTOPT_SYSVGROUPS "sysvgroups" /* group-ID from current process */
1701 #define MNTOPT_ALLOCSIZE "allocsize" /* preferred allocation size */
1702 #define MNTOPT_NORECOVERY "norecovery" /* don't run XFS recovery */
1703 #define MNTOPT_BARRIER "barrier" /* use writer barriers for log write and
1704 * unwritten extent conversion */
1705 #define MNTOPT_NOBARRIER "nobarrier" /* .. disable */
1706 #define MNTOPT_OSYNCISOSYNC "osyncisosync" /* o_sync is REALLY o_sync */
1707 #define MNTOPT_64BITINODE "inode64" /* inodes can be allocated anywhere */
1708 #define MNTOPT_IKEEP "ikeep" /* do not free empty inode clusters */
1709 #define MNTOPT_NOIKEEP "noikeep" /* free empty inode clusters */
1710 #define MNTOPT_LARGEIO "largeio" /* report large I/O sizes in stat() */
1711 #define MNTOPT_NOLARGEIO "nolargeio" /* do not report large I/O sizes
1712 * in stat(). */
1713 #define MNTOPT_ATTR2 "attr2" /* do use attr2 attribute format */
1714 #define MNTOPT_NOATTR2 "noattr2" /* do not use attr2 attribute format */
1715 #define MNTOPT_FILESTREAM "filestreams" /* use filestreams allocator */
1716 #define MNTOPT_QUOTA "quota" /* disk quotas (user) */
1717 #define MNTOPT_NOQUOTA "noquota" /* no quotas */
1718 #define MNTOPT_USRQUOTA "usrquota" /* user quota enabled */
1719 #define MNTOPT_GRPQUOTA "grpquota" /* group quota enabled */
1720 #define MNTOPT_PRJQUOTA "prjquota" /* project quota enabled */
1721 #define MNTOPT_UQUOTA "uquota" /* user quota (IRIX variant) */
1722 #define MNTOPT_GQUOTA "gquota" /* group quota (IRIX variant) */
1723 #define MNTOPT_PQUOTA "pquota" /* project quota (IRIX variant) */
1724 #define MNTOPT_UQUOTANOENF "uqnoenforce"/* user quota limit enforcement */
1725 #define MNTOPT_GQUOTANOENF "gqnoenforce"/* group quota limit enforcement */
1726 #define MNTOPT_PQUOTANOENF "pqnoenforce"/* project quota limit enforcement */
1727 #define MNTOPT_QUOTANOENF "qnoenforce" /* same as uqnoenforce */
1728 #define MNTOPT_DMAPI "dmapi" /* DMI enabled (DMAPI / XDSM) */
1729 #define MNTOPT_XDSM "xdsm" /* DMI enabled (DMAPI / XDSM) */
1730 #define MNTOPT_DMI "dmi" /* DMI enabled (DMAPI / XDSM) */
1731
1732 STATIC unsigned long
1733 suffix_strtoul(char *s, char **endp, unsigned int base)
1734 {
1735 int last, shift_left_factor = 0;
1736 char *value = s;
1737
1738 last = strlen(value) - 1;
1739 if (value[last] == 'K' || value[last] == 'k') {
1740 shift_left_factor = 10;
1741 value[last] = '\0';
1742 }
1743 if (value[last] == 'M' || value[last] == 'm') {
1744 shift_left_factor = 20;
1745 value[last] = '\0';
1746 }
1747 if (value[last] == 'G' || value[last] == 'g') {
1748 shift_left_factor = 30;
1749 value[last] = '\0';
1750 }
1751
1752 return simple_strtoul((const char *)s, endp, base) << shift_left_factor;
1753 }
1754
1755 int
1756 xfs_parseargs(
1757 struct xfs_mount *mp,
1758 char *options,
1759 struct xfs_mount_args *args,
1760 int update)
1761 {
1762 char *this_char, *value, *eov;
1763 int dsunit, dswidth, vol_dsunit, vol_dswidth;
1764 int iosize;
1765 int ikeep = 0;
1766
1767 args->flags |= XFSMNT_BARRIER;
1768 args->flags2 |= XFSMNT2_COMPAT_IOSIZE;
1769
1770 if (!options)
1771 goto done;
1772
1773 iosize = dsunit = dswidth = vol_dsunit = vol_dswidth = 0;
1774
1775 while ((this_char = strsep(&options, ",")) != NULL) {
1776 if (!*this_char)
1777 continue;
1778 if ((value = strchr(this_char, '=')) != NULL)
1779 *value++ = 0;
1780
1781 if (!strcmp(this_char, MNTOPT_LOGBUFS)) {
1782 if (!value || !*value) {
1783 cmn_err(CE_WARN,
1784 "XFS: %s option requires an argument",
1785 this_char);
1786 return EINVAL;
1787 }
1788 args->logbufs = simple_strtoul(value, &eov, 10);
1789 } else if (!strcmp(this_char, MNTOPT_LOGBSIZE)) {
1790 if (!value || !*value) {
1791 cmn_err(CE_WARN,
1792 "XFS: %s option requires an argument",
1793 this_char);
1794 return EINVAL;
1795 }
1796 args->logbufsize = suffix_strtoul(value, &eov, 10);
1797 } else if (!strcmp(this_char, MNTOPT_LOGDEV)) {
1798 if (!value || !*value) {
1799 cmn_err(CE_WARN,
1800 "XFS: %s option requires an argument",
1801 this_char);
1802 return EINVAL;
1803 }
1804 strncpy(args->logname, value, MAXNAMELEN);
1805 } else if (!strcmp(this_char, MNTOPT_MTPT)) {
1806 if (!value || !*value) {
1807 cmn_err(CE_WARN,
1808 "XFS: %s option requires an argument",
1809 this_char);
1810 return EINVAL;
1811 }
1812 strncpy(args->mtpt, value, MAXNAMELEN);
1813 } else if (!strcmp(this_char, MNTOPT_RTDEV)) {
1814 if (!value || !*value) {
1815 cmn_err(CE_WARN,
1816 "XFS: %s option requires an argument",
1817 this_char);
1818 return EINVAL;
1819 }
1820 strncpy(args->rtname, value, MAXNAMELEN);
1821 } else if (!strcmp(this_char, MNTOPT_BIOSIZE)) {
1822 if (!value || !*value) {
1823 cmn_err(CE_WARN,
1824 "XFS: %s option requires an argument",
1825 this_char);
1826 return EINVAL;
1827 }
1828 iosize = simple_strtoul(value, &eov, 10);
1829 args->flags |= XFSMNT_IOSIZE;
1830 args->iosizelog = (uint8_t) iosize;
1831 } else if (!strcmp(this_char, MNTOPT_ALLOCSIZE)) {
1832 if (!value || !*value) {
1833 cmn_err(CE_WARN,
1834 "XFS: %s option requires an argument",
1835 this_char);
1836 return EINVAL;
1837 }
1838 iosize = suffix_strtoul(value, &eov, 10);
1839 args->flags |= XFSMNT_IOSIZE;
1840 args->iosizelog = ffs(iosize) - 1;
1841 } else if (!strcmp(this_char, MNTOPT_GRPID) ||
1842 !strcmp(this_char, MNTOPT_BSDGROUPS)) {
1843 mp->m_flags |= XFS_MOUNT_GRPID;
1844 } else if (!strcmp(this_char, MNTOPT_NOGRPID) ||
1845 !strcmp(this_char, MNTOPT_SYSVGROUPS)) {
1846 mp->m_flags &= ~XFS_MOUNT_GRPID;
1847 } else if (!strcmp(this_char, MNTOPT_WSYNC)) {
1848 args->flags |= XFSMNT_WSYNC;
1849 } else if (!strcmp(this_char, MNTOPT_OSYNCISOSYNC)) {
1850 args->flags |= XFSMNT_OSYNCISOSYNC;
1851 } else if (!strcmp(this_char, MNTOPT_NORECOVERY)) {
1852 args->flags |= XFSMNT_NORECOVERY;
1853 } else if (!strcmp(this_char, MNTOPT_INO64)) {
1854 args->flags |= XFSMNT_INO64;
1855 #if !XFS_BIG_INUMS
1856 cmn_err(CE_WARN,
1857 "XFS: %s option not allowed on this system",
1858 this_char);
1859 return EINVAL;
1860 #endif
1861 } else if (!strcmp(this_char, MNTOPT_NOALIGN)) {
1862 args->flags |= XFSMNT_NOALIGN;
1863 } else if (!strcmp(this_char, MNTOPT_SWALLOC)) {
1864 args->flags |= XFSMNT_SWALLOC;
1865 } else if (!strcmp(this_char, MNTOPT_SUNIT)) {
1866 if (!value || !*value) {
1867 cmn_err(CE_WARN,
1868 "XFS: %s option requires an argument",
1869 this_char);
1870 return EINVAL;
1871 }
1872 dsunit = simple_strtoul(value, &eov, 10);
1873 } else if (!strcmp(this_char, MNTOPT_SWIDTH)) {
1874 if (!value || !*value) {
1875 cmn_err(CE_WARN,
1876 "XFS: %s option requires an argument",
1877 this_char);
1878 return EINVAL;
1879 }
1880 dswidth = simple_strtoul(value, &eov, 10);
1881 } else if (!strcmp(this_char, MNTOPT_64BITINODE)) {
1882 args->flags &= ~XFSMNT_32BITINODES;
1883 #if !XFS_BIG_INUMS
1884 cmn_err(CE_WARN,
1885 "XFS: %s option not allowed on this system",
1886 this_char);
1887 return EINVAL;
1888 #endif
1889 } else if (!strcmp(this_char, MNTOPT_NOUUID)) {
1890 args->flags |= XFSMNT_NOUUID;
1891 } else if (!strcmp(this_char, MNTOPT_BARRIER)) {
1892 args->flags |= XFSMNT_BARRIER;
1893 } else if (!strcmp(this_char, MNTOPT_NOBARRIER)) {
1894 args->flags &= ~XFSMNT_BARRIER;
1895 } else if (!strcmp(this_char, MNTOPT_IKEEP)) {
1896 ikeep = 1;
1897 args->flags &= ~XFSMNT_IDELETE;
1898 } else if (!strcmp(this_char, MNTOPT_NOIKEEP)) {
1899 args->flags |= XFSMNT_IDELETE;
1900 } else if (!strcmp(this_char, MNTOPT_LARGEIO)) {
1901 args->flags2 &= ~XFSMNT2_COMPAT_IOSIZE;
1902 } else if (!strcmp(this_char, MNTOPT_NOLARGEIO)) {
1903 args->flags2 |= XFSMNT2_COMPAT_IOSIZE;
1904 } else if (!strcmp(this_char, MNTOPT_ATTR2)) {
1905 args->flags |= XFSMNT_ATTR2;
1906 } else if (!strcmp(this_char, MNTOPT_NOATTR2)) {
1907 args->flags &= ~XFSMNT_ATTR2;
1908 } else if (!strcmp(this_char, MNTOPT_FILESTREAM)) {
1909 args->flags2 |= XFSMNT2_FILESTREAMS;
1910 } else if (!strcmp(this_char, MNTOPT_NOQUOTA)) {
1911 args->flags &= ~(XFSMNT_UQUOTAENF|XFSMNT_UQUOTA);
1912 args->flags &= ~(XFSMNT_GQUOTAENF|XFSMNT_GQUOTA);
1913 } else if (!strcmp(this_char, MNTOPT_QUOTA) ||
1914 !strcmp(this_char, MNTOPT_UQUOTA) ||
1915 !strcmp(this_char, MNTOPT_USRQUOTA)) {
1916 args->flags |= XFSMNT_UQUOTA | XFSMNT_UQUOTAENF;
1917 } else if (!strcmp(this_char, MNTOPT_QUOTANOENF) ||
1918 !strcmp(this_char, MNTOPT_UQUOTANOENF)) {
1919 args->flags |= XFSMNT_UQUOTA;
1920 args->flags &= ~XFSMNT_UQUOTAENF;
1921 } else if (!strcmp(this_char, MNTOPT_PQUOTA) ||
1922 !strcmp(this_char, MNTOPT_PRJQUOTA)) {
1923 args->flags |= XFSMNT_PQUOTA | XFSMNT_PQUOTAENF;
1924 } else if (!strcmp(this_char, MNTOPT_PQUOTANOENF)) {
1925 args->flags |= XFSMNT_PQUOTA;
1926 args->flags &= ~XFSMNT_PQUOTAENF;
1927 } else if (!strcmp(this_char, MNTOPT_GQUOTA) ||
1928 !strcmp(this_char, MNTOPT_GRPQUOTA)) {
1929 args->flags |= XFSMNT_GQUOTA | XFSMNT_GQUOTAENF;
1930 } else if (!strcmp(this_char, MNTOPT_GQUOTANOENF)) {
1931 args->flags |= XFSMNT_GQUOTA;
1932 args->flags &= ~XFSMNT_GQUOTAENF;
1933 } else if (!strcmp(this_char, MNTOPT_DMAPI)) {
1934 args->flags |= XFSMNT_DMAPI;
1935 } else if (!strcmp(this_char, MNTOPT_XDSM)) {
1936 args->flags |= XFSMNT_DMAPI;
1937 } else if (!strcmp(this_char, MNTOPT_DMI)) {
1938 args->flags |= XFSMNT_DMAPI;
1939 } else if (!strcmp(this_char, "ihashsize")) {
1940 cmn_err(CE_WARN,
1941 "XFS: ihashsize no longer used, option is deprecated.");
1942 } else if (!strcmp(this_char, "osyncisdsync")) {
1943 /* no-op, this is now the default */
1944 cmn_err(CE_WARN,
1945 "XFS: osyncisdsync is now the default, option is deprecated.");
1946 } else if (!strcmp(this_char, "irixsgid")) {
1947 cmn_err(CE_WARN,
1948 "XFS: irixsgid is now a sysctl(2) variable, option is deprecated.");
1949 } else {
1950 cmn_err(CE_WARN,
1951 "XFS: unknown mount option [%s].", this_char);
1952 return EINVAL;
1953 }
1954 }
1955
1956 if (args->flags & XFSMNT_NORECOVERY) {
1957 if ((mp->m_flags & XFS_MOUNT_RDONLY) == 0) {
1958 cmn_err(CE_WARN,
1959 "XFS: no-recovery mounts must be read-only.");
1960 return EINVAL;
1961 }
1962 }
1963
1964 if ((args->flags & XFSMNT_NOALIGN) && (dsunit || dswidth)) {
1965 cmn_err(CE_WARN,
1966 "XFS: sunit and swidth options incompatible with the noalign option");
1967 return EINVAL;
1968 }
1969
1970 if ((args->flags & XFSMNT_GQUOTA) && (args->flags & XFSMNT_PQUOTA)) {
1971 cmn_err(CE_WARN,
1972 "XFS: cannot mount with both project and group quota");
1973 return EINVAL;
1974 }
1975
1976 if ((args->flags & XFSMNT_DMAPI) && *args->mtpt == '\0') {
1977 printk("XFS: %s option needs the mount point option as well\n",
1978 MNTOPT_DMAPI);
1979 return EINVAL;
1980 }
1981
1982 if ((dsunit && !dswidth) || (!dsunit && dswidth)) {
1983 cmn_err(CE_WARN,
1984 "XFS: sunit and swidth must be specified together");
1985 return EINVAL;
1986 }
1987
1988 if (dsunit && (dswidth % dsunit != 0)) {
1989 cmn_err(CE_WARN,
1990 "XFS: stripe width (%d) must be a multiple of the stripe unit (%d)",
1991 dswidth, dsunit);
1992 return EINVAL;
1993 }
1994
1995 /*
1996 * Applications using DMI filesystems often expect the
1997 * inode generation number to be monotonically increasing.
1998 * If we delete inode chunks we break this assumption, so
1999 * keep unused inode chunks on disk for DMI filesystems
2000 * until we come up with a better solution.
2001 * Note that if "ikeep" or "noikeep" mount options are
2002 * supplied, then they are honored.
2003 */
2004 if (!(args->flags & XFSMNT_DMAPI) && !ikeep)
2005 args->flags |= XFSMNT_IDELETE;
2006
2007 if ((args->flags & XFSMNT_NOALIGN) != XFSMNT_NOALIGN) {
2008 if (dsunit) {
2009 args->sunit = dsunit;
2010 args->flags |= XFSMNT_RETERR;
2011 } else {
2012 args->sunit = vol_dsunit;
2013 }
2014 dswidth ? (args->swidth = dswidth) :
2015 (args->swidth = vol_dswidth);
2016 } else {
2017 args->sunit = args->swidth = 0;
2018 }
2019
2020 done:
2021 if (args->flags & XFSMNT_32BITINODES)
2022 mp->m_flags |= XFS_MOUNT_SMALL_INUMS;
2023 if (args->flags2)
2024 args->flags |= XFSMNT_FLAGS2;
2025 return 0;
2026 }
2027
2028 int
2029 xfs_showargs(
2030 struct xfs_mount *mp,
2031 struct seq_file *m)
2032 {
2033 static struct proc_xfs_info {
2034 int flag;
2035 char *str;
2036 } xfs_info[] = {
2037 /* the few simple ones we can get from the mount struct */
2038 { XFS_MOUNT_WSYNC, "," MNTOPT_WSYNC },
2039 { XFS_MOUNT_INO64, "," MNTOPT_INO64 },
2040 { XFS_MOUNT_NOALIGN, "," MNTOPT_NOALIGN },
2041 { XFS_MOUNT_SWALLOC, "," MNTOPT_SWALLOC },
2042 { XFS_MOUNT_NOUUID, "," MNTOPT_NOUUID },
2043 { XFS_MOUNT_NORECOVERY, "," MNTOPT_NORECOVERY },
2044 { XFS_MOUNT_OSYNCISOSYNC, "," MNTOPT_OSYNCISOSYNC },
2045 { 0, NULL }
2046 };
2047 struct proc_xfs_info *xfs_infop;
2048
2049 for (xfs_infop = xfs_info; xfs_infop->flag; xfs_infop++) {
2050 if (mp->m_flags & xfs_infop->flag)
2051 seq_puts(m, xfs_infop->str);
2052 }
2053
2054 if (mp->m_flags & XFS_MOUNT_DFLT_IOSIZE)
2055 seq_printf(m, "," MNTOPT_ALLOCSIZE "=%dk",
2056 (int)(1 << mp->m_writeio_log) >> 10);
2057
2058 if (mp->m_logbufs > 0)
2059 seq_printf(m, "," MNTOPT_LOGBUFS "=%d", mp->m_logbufs);
2060 if (mp->m_logbsize > 0)
2061 seq_printf(m, "," MNTOPT_LOGBSIZE "=%dk", mp->m_logbsize >> 10);
2062
2063 if (mp->m_logname)
2064 seq_printf(m, "," MNTOPT_LOGDEV "=%s", mp->m_logname);
2065 if (mp->m_rtname)
2066 seq_printf(m, "," MNTOPT_RTDEV "=%s", mp->m_rtname);
2067
2068 if (mp->m_dalign > 0)
2069 seq_printf(m, "," MNTOPT_SUNIT "=%d",
2070 (int)XFS_FSB_TO_BB(mp, mp->m_dalign));
2071 if (mp->m_swidth > 0)
2072 seq_printf(m, "," MNTOPT_SWIDTH "=%d",
2073 (int)XFS_FSB_TO_BB(mp, mp->m_swidth));
2074
2075 if (!(mp->m_flags & XFS_MOUNT_IDELETE))
2076 seq_printf(m, "," MNTOPT_IKEEP);
2077 if (!(mp->m_flags & XFS_MOUNT_COMPAT_IOSIZE))
2078 seq_printf(m, "," MNTOPT_LARGEIO);
2079
2080 if (!(mp->m_flags & XFS_MOUNT_SMALL_INUMS))
2081 seq_printf(m, "," MNTOPT_64BITINODE);
2082 if (mp->m_flags & XFS_MOUNT_GRPID)
2083 seq_printf(m, "," MNTOPT_GRPID);
2084
2085 if (mp->m_qflags & XFS_UQUOTA_ACCT) {
2086 if (mp->m_qflags & XFS_UQUOTA_ENFD)
2087 seq_puts(m, "," MNTOPT_USRQUOTA);
2088 else
2089 seq_puts(m, "," MNTOPT_UQUOTANOENF);
2090 }
2091
2092 if (mp->m_qflags & XFS_PQUOTA_ACCT) {
2093 if (mp->m_qflags & XFS_OQUOTA_ENFD)
2094 seq_puts(m, "," MNTOPT_PRJQUOTA);
2095 else
2096 seq_puts(m, "," MNTOPT_PQUOTANOENF);
2097 }
2098
2099 if (mp->m_qflags & XFS_GQUOTA_ACCT) {
2100 if (mp->m_qflags & XFS_OQUOTA_ENFD)
2101 seq_puts(m, "," MNTOPT_GRPQUOTA);
2102 else
2103 seq_puts(m, "," MNTOPT_GQUOTANOENF);
2104 }
2105
2106 if (!(mp->m_qflags & XFS_ALL_QUOTA_ACCT))
2107 seq_puts(m, "," MNTOPT_NOQUOTA);
2108
2109 if (mp->m_flags & XFS_MOUNT_DMAPI)
2110 seq_puts(m, "," MNTOPT_DMAPI);
2111 return 0;
2112 }
2113
2114 /*
2115 * Second stage of a freeze. The data is already frozen so we only
2116 * need to take care of themetadata. Once that's done write a dummy
2117 * record to dirty the log in case of a crash while frozen.
2118 */
2119 void
2120 xfs_freeze(
2121 xfs_mount_t *mp)
2122 {
2123 xfs_attr_quiesce(mp);
2124 xfs_fs_log_dummy(mp);
2125 }
WRT350N Kernel Patches