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[PATCH] kprobes: fix broken fault handling for sparc64
[linux-2.6/zen-sources.git] / fs / xfs / xfs_vfsops.c
blobd4ec4dfaf19c60d33ca2c2518a5f9b099cbcd4fd
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_dir.h"
28 #include "xfs_dir2.h"
29 #include "xfs_dmapi.h"
30 #include "xfs_mount.h"
31 #include "xfs_da_btree.h"
32 #include "xfs_bmap_btree.h"
33 #include "xfs_ialloc_btree.h"
34 #include "xfs_alloc_btree.h"
35 #include "xfs_dir_sf.h"
36 #include "xfs_dir2_sf.h"
37 #include "xfs_attr_sf.h"
38 #include "xfs_dinode.h"
39 #include "xfs_inode.h"
40 #include "xfs_inode_item.h"
41 #include "xfs_btree.h"
42 #include "xfs_alloc.h"
43 #include "xfs_ialloc.h"
44 #include "xfs_quota.h"
45 #include "xfs_error.h"
46 #include "xfs_bmap.h"
47 #include "xfs_rw.h"
48 #include "xfs_refcache.h"
49 #include "xfs_buf_item.h"
50 #include "xfs_log_priv.h"
51 #include "xfs_dir2_trace.h"
52 #include "xfs_extfree_item.h"
53 #include "xfs_acl.h"
54 #include "xfs_attr.h"
55 #include "xfs_clnt.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
87 /*
88 * The size of the zone allocated buf log item is the maximum
89 * size possible under XFS. This wastes a little bit of memory,
90 * but it is much faster.
91 */
92 xfs_buf_item_zone =
93 kmem_zone_init((sizeof(xfs_buf_log_item_t) +
94 (((XFS_MAX_BLOCKSIZE / XFS_BLI_CHUNK) /
95 NBWORD) * sizeof(int))),
96 "xfs_buf_item");
97 xfs_efd_zone =
98 kmem_zone_init((sizeof(xfs_efd_log_item_t) +
99 ((XFS_EFD_MAX_FAST_EXTENTS - 1) *
100 sizeof(xfs_extent_t))),
101 "xfs_efd_item");
102 xfs_efi_zone =
103 kmem_zone_init((sizeof(xfs_efi_log_item_t) +
104 ((XFS_EFI_MAX_FAST_EXTENTS - 1) *
105 sizeof(xfs_extent_t))),
106 "xfs_efi_item");
107
108 /*
109 * These zones warrant special memory allocator hints
110 */
111 xfs_inode_zone =
112 kmem_zone_init_flags(sizeof(xfs_inode_t), "xfs_inode",
113 KM_ZONE_HWALIGN | KM_ZONE_RECLAIM |
114 KM_ZONE_SPREAD, NULL);
115 xfs_ili_zone =
116 kmem_zone_init_flags(sizeof(xfs_inode_log_item_t), "xfs_ili",
117 KM_ZONE_SPREAD, NULL);
118 xfs_chashlist_zone =
119 kmem_zone_init_flags(sizeof(xfs_chashlist_t), "xfs_chashlist",
120 KM_ZONE_SPREAD, NULL);
121
122 /*
123 * Allocate global trace buffers.
124 */
125 #ifdef XFS_ALLOC_TRACE
126 xfs_alloc_trace_buf = ktrace_alloc(XFS_ALLOC_TRACE_SIZE, KM_SLEEP);
127 #endif
128 #ifdef XFS_BMAP_TRACE
129 xfs_bmap_trace_buf = ktrace_alloc(XFS_BMAP_TRACE_SIZE, KM_SLEEP);
130 #endif
131 #ifdef XFS_BMBT_TRACE
132 xfs_bmbt_trace_buf = ktrace_alloc(XFS_BMBT_TRACE_SIZE, KM_SLEEP);
133 #endif
134 #ifdef XFS_DIR_TRACE
135 xfs_dir_trace_buf = ktrace_alloc(XFS_DIR_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_chashlist_zone;
168
169 xfs_cleanup_procfs();
170 xfs_sysctl_unregister();
171 xfs_refcache_destroy();
172 xfs_acl_zone_destroy(xfs_acl_zone);
173
174 #ifdef XFS_DIR2_TRACE
175 ktrace_free(xfs_dir2_trace_buf);
176 #endif
177 #ifdef XFS_ATTR_TRACE
178 ktrace_free(xfs_attr_trace_buf);
179 #endif
180 #ifdef XFS_DIR_TRACE
181 ktrace_free(xfs_dir_trace_buf);
182 #endif
183 #ifdef XFS_BMBT_TRACE
184 ktrace_free(xfs_bmbt_trace_buf);
185 #endif
186 #ifdef XFS_BMAP_TRACE
187 ktrace_free(xfs_bmap_trace_buf);
188 #endif
189 #ifdef XFS_ALLOC_TRACE
190 ktrace_free(xfs_alloc_trace_buf);
191 #endif
192
193 kmem_zone_destroy(xfs_bmap_free_item_zone);
194 kmem_zone_destroy(xfs_btree_cur_zone);
195 kmem_zone_destroy(xfs_inode_zone);
196 kmem_zone_destroy(xfs_trans_zone);
197 kmem_zone_destroy(xfs_da_state_zone);
198 kmem_zone_destroy(xfs_dabuf_zone);
199 kmem_zone_destroy(xfs_buf_item_zone);
200 kmem_zone_destroy(xfs_efd_zone);
201 kmem_zone_destroy(xfs_efi_zone);
202 kmem_zone_destroy(xfs_ifork_zone);
203 kmem_zone_destroy(xfs_ili_zone);
204 kmem_zone_destroy(xfs_chashlist_zone);
205 }
206
207 /*
208 * xfs_start_flags
209 *
210 * This function fills in xfs_mount_t fields based on mount args.
211 * Note: the superblock has _not_ yet been read in.
212 */
213 STATIC int
214 xfs_start_flags(
215 struct vfs *vfs,
216 struct xfs_mount_args *ap,
217 struct xfs_mount *mp)
218 {
219 /* Values are in BBs */
220 if ((ap->flags & XFSMNT_NOALIGN) != XFSMNT_NOALIGN) {
221 /*
222 * At this point the superblock has not been read
223 * in, therefore we do not know the block size.
224 * Before the mount call ends we will convert
225 * these to FSBs.
226 */
227 mp->m_dalign = ap->sunit;
228 mp->m_swidth = ap->swidth;
229 }
230
231 if (ap->logbufs != -1 &&
232 ap->logbufs != 0 &&
233 (ap->logbufs < XLOG_MIN_ICLOGS ||
234 ap->logbufs > XLOG_MAX_ICLOGS)) {
235 cmn_err(CE_WARN,
236 "XFS: invalid logbufs value: %d [not %d-%d]",
237 ap->logbufs, XLOG_MIN_ICLOGS, XLOG_MAX_ICLOGS);
238 return XFS_ERROR(EINVAL);
239 }
240 mp->m_logbufs = ap->logbufs;
241 if (ap->logbufsize != -1 &&
242 ap->logbufsize != 0 &&
243 ap->logbufsize != 16 * 1024 &&
244 ap->logbufsize != 32 * 1024 &&
245 ap->logbufsize != 64 * 1024 &&
246 ap->logbufsize != 128 * 1024 &&
247 ap->logbufsize != 256 * 1024) {
248 cmn_err(CE_WARN,
249 "XFS: invalid logbufsize: %d [not 16k,32k,64k,128k or 256k]",
250 ap->logbufsize);
251 return XFS_ERROR(EINVAL);
252 }
253 mp->m_ihsize = ap->ihashsize;
254 mp->m_logbsize = ap->logbufsize;
255 mp->m_fsname_len = strlen(ap->fsname) + 1;
256 mp->m_fsname = kmem_alloc(mp->m_fsname_len, KM_SLEEP);
257 strcpy(mp->m_fsname, ap->fsname);
258 if (ap->rtname[0]) {
259 mp->m_rtname = kmem_alloc(strlen(ap->rtname) + 1, KM_SLEEP);
260 strcpy(mp->m_rtname, ap->rtname);
261 }
262 if (ap->logname[0]) {
263 mp->m_logname = kmem_alloc(strlen(ap->logname) + 1, KM_SLEEP);
264 strcpy(mp->m_logname, ap->logname);
265 }
266
267 if (ap->flags & XFSMNT_WSYNC)
268 mp->m_flags |= XFS_MOUNT_WSYNC;
269 #if XFS_BIG_INUMS
270 if (ap->flags & XFSMNT_INO64) {
271 mp->m_flags |= XFS_MOUNT_INO64;
272 mp->m_inoadd = XFS_INO64_OFFSET;
273 }
274 #endif
275 if (ap->flags & XFSMNT_RETERR)
276 mp->m_flags |= XFS_MOUNT_RETERR;
277 if (ap->flags & XFSMNT_NOALIGN)
278 mp->m_flags |= XFS_MOUNT_NOALIGN;
279 if (ap->flags & XFSMNT_SWALLOC)
280 mp->m_flags |= XFS_MOUNT_SWALLOC;
281 if (ap->flags & XFSMNT_OSYNCISOSYNC)
282 mp->m_flags |= XFS_MOUNT_OSYNCISOSYNC;
283 if (ap->flags & XFSMNT_32BITINODES)
284 mp->m_flags |= XFS_MOUNT_32BITINODES;
285
286 if (ap->flags & XFSMNT_IOSIZE) {
287 if (ap->iosizelog > XFS_MAX_IO_LOG ||
288 ap->iosizelog < XFS_MIN_IO_LOG) {
289 cmn_err(CE_WARN,
290 "XFS: invalid log iosize: %d [not %d-%d]",
291 ap->iosizelog, XFS_MIN_IO_LOG,
292 XFS_MAX_IO_LOG);
293 return XFS_ERROR(EINVAL);
294 }
295
296 mp->m_flags |= XFS_MOUNT_DFLT_IOSIZE;
297 mp->m_readio_log = mp->m_writeio_log = ap->iosizelog;
298 }
299
300 if (ap->flags & XFSMNT_IHASHSIZE)
301 mp->m_flags |= XFS_MOUNT_IHASHSIZE;
302 if (ap->flags & XFSMNT_IDELETE)
303 mp->m_flags |= XFS_MOUNT_IDELETE;
304 if (ap->flags & XFSMNT_DIRSYNC)
305 mp->m_flags |= XFS_MOUNT_DIRSYNC;
306 if (ap->flags & XFSMNT_ATTR2)
307 mp->m_flags |= XFS_MOUNT_ATTR2;
308
309 if (ap->flags2 & XFSMNT2_COMPAT_IOSIZE)
310 mp->m_flags |= XFS_MOUNT_COMPAT_IOSIZE;
311
312 /*
313 * no recovery flag requires a read-only mount
314 */
315 if (ap->flags & XFSMNT_NORECOVERY) {
316 if (!(vfs->vfs_flag & VFS_RDONLY)) {
317 cmn_err(CE_WARN,
318 "XFS: tried to mount a FS read-write without recovery!");
319 return XFS_ERROR(EINVAL);
320 }
321 mp->m_flags |= XFS_MOUNT_NORECOVERY;
322 }
323
324 if (ap->flags & XFSMNT_NOUUID)
325 mp->m_flags |= XFS_MOUNT_NOUUID;
326 if (ap->flags & XFSMNT_BARRIER)
327 mp->m_flags |= XFS_MOUNT_BARRIER;
328 else
329 mp->m_flags &= ~XFS_MOUNT_BARRIER;
330
331 return 0;
332 }
333
334 /*
335 * This function fills in xfs_mount_t fields based on mount args.
336 * Note: the superblock _has_ now been read in.
337 */
338 STATIC int
339 xfs_finish_flags(
340 struct vfs *vfs,
341 struct xfs_mount_args *ap,
342 struct xfs_mount *mp)
343 {
344 int ronly = (vfs->vfs_flag & VFS_RDONLY);
345
346 /* Fail a mount where the logbuf is smaller then the log stripe */
347 if (XFS_SB_VERSION_HASLOGV2(&mp->m_sb)) {
348 if ((ap->logbufsize <= 0) &&
349 (mp->m_sb.sb_logsunit > XLOG_BIG_RECORD_BSIZE)) {
350 mp->m_logbsize = mp->m_sb.sb_logsunit;
351 } else if (ap->logbufsize > 0 &&
352 ap->logbufsize < mp->m_sb.sb_logsunit) {
353 cmn_err(CE_WARN,
354 "XFS: logbuf size must be greater than or equal to log stripe size");
355 return XFS_ERROR(EINVAL);
356 }
357 } else {
358 /* Fail a mount if the logbuf is larger than 32K */
359 if (ap->logbufsize > XLOG_BIG_RECORD_BSIZE) {
360 cmn_err(CE_WARN,
361 "XFS: logbuf size for version 1 logs must be 16K or 32K");
362 return XFS_ERROR(EINVAL);
363 }
364 }
365
366 if (XFS_SB_VERSION_HASATTR2(&mp->m_sb)) {
367 mp->m_flags |= XFS_MOUNT_ATTR2;
368 }
369
370 /*
371 * prohibit r/w mounts of read-only filesystems
372 */
373 if ((mp->m_sb.sb_flags & XFS_SBF_READONLY) && !ronly) {
374 cmn_err(CE_WARN,
375 "XFS: cannot mount a read-only filesystem as read-write");
376 return XFS_ERROR(EROFS);
377 }
378
379 /*
380 * check for shared mount.
381 */
382 if (ap->flags & XFSMNT_SHARED) {
383 if (!XFS_SB_VERSION_HASSHARED(&mp->m_sb))
384 return XFS_ERROR(EINVAL);
385
386 /*
387 * For IRIX 6.5, shared mounts must have the shared
388 * version bit set, have the persistent readonly
389 * field set, must be version 0 and can only be mounted
390 * read-only.
391 */
392 if (!ronly || !(mp->m_sb.sb_flags & XFS_SBF_READONLY) ||
393 (mp->m_sb.sb_shared_vn != 0))
394 return XFS_ERROR(EINVAL);
395
396 mp->m_flags |= XFS_MOUNT_SHARED;
397
398 /*
399 * Shared XFS V0 can't deal with DMI. Return EINVAL.
400 */
401 if (mp->m_sb.sb_shared_vn == 0 && (ap->flags & XFSMNT_DMAPI))
402 return XFS_ERROR(EINVAL);
403 }
404
405 return 0;
406 }
407
408 /*
409 * xfs_mount
410 *
411 * The file system configurations are:
412 * (1) device (partition) with data and internal log
413 * (2) logical volume with data and log subvolumes.
414 * (3) logical volume with data, log, and realtime subvolumes.
415 *
416 * We only have to handle opening the log and realtime volumes here if
417 * they are present. The data subvolume has already been opened by
418 * get_sb_bdev() and is stored in vfsp->vfs_super->s_bdev.
419 */
420 STATIC int
421 xfs_mount(
422 struct bhv_desc *bhvp,
423 struct xfs_mount_args *args,
424 cred_t *credp)
425 {
426 struct vfs *vfsp = bhvtovfs(bhvp);
427 struct bhv_desc *p;
428 struct xfs_mount *mp = XFS_BHVTOM(bhvp);
429 struct block_device *ddev, *logdev, *rtdev;
430 int flags = 0, error;
431
432 ddev = vfsp->vfs_super->s_bdev;
433 logdev = rtdev = NULL;
434
435 /*
436 * Setup xfs_mount function vectors from available behaviors
437 */
438 p = vfs_bhv_lookup(vfsp, VFS_POSITION_DM);
439 mp->m_dm_ops = p ? *(xfs_dmops_t *) vfs_bhv_custom(p) : xfs_dmcore_stub;
440 p = vfs_bhv_lookup(vfsp, VFS_POSITION_QM);
441 mp->m_qm_ops = p ? *(xfs_qmops_t *) vfs_bhv_custom(p) : xfs_qmcore_stub;
442 p = vfs_bhv_lookup(vfsp, VFS_POSITION_IO);
443 mp->m_io_ops = p ? *(xfs_ioops_t *) vfs_bhv_custom(p) : xfs_iocore_xfs;
444
445 /*
446 * Open real time and log devices - order is important.
447 */
448 if (args->logname[0]) {
449 error = xfs_blkdev_get(mp, args->logname, &logdev);
450 if (error)
451 return error;
452 }
453 if (args->rtname[0]) {
454 error = xfs_blkdev_get(mp, args->rtname, &rtdev);
455 if (error) {
456 xfs_blkdev_put(logdev);
457 return error;
458 }
459
460 if (rtdev == ddev || rtdev == logdev) {
461 cmn_err(CE_WARN,
462 "XFS: Cannot mount filesystem with identical rtdev and ddev/logdev.");
463 xfs_blkdev_put(logdev);
464 xfs_blkdev_put(rtdev);
465 return EINVAL;
466 }
467 }
468
469 /*
470 * Setup xfs_mount buffer target pointers
471 */
472 error = ENOMEM;
473 mp->m_ddev_targp = xfs_alloc_buftarg(ddev, 0);
474 if (!mp->m_ddev_targp) {
475 xfs_blkdev_put(logdev);
476 xfs_blkdev_put(rtdev);
477 return error;
478 }
479 if (rtdev) {
480 mp->m_rtdev_targp = xfs_alloc_buftarg(rtdev, 1);
481 if (!mp->m_rtdev_targp)
482 goto error0;
483 }
484 mp->m_logdev_targp = (logdev && logdev != ddev) ?
485 xfs_alloc_buftarg(logdev, 1) : mp->m_ddev_targp;
486 if (!mp->m_logdev_targp)
487 goto error0;
488
489 /*
490 * Setup flags based on mount(2) options and then the superblock
491 */
492 error = xfs_start_flags(vfsp, args, mp);
493 if (error)
494 goto error1;
495 error = xfs_readsb(mp);
496 if (error)
497 goto error1;
498 error = xfs_finish_flags(vfsp, args, mp);
499 if (error)
500 goto error2;
501
502 /*
503 * Setup xfs_mount buffer target pointers based on superblock
504 */
505 error = xfs_setsize_buftarg(mp->m_ddev_targp, mp->m_sb.sb_blocksize,
506 mp->m_sb.sb_sectsize);
507 if (!error && logdev && logdev != ddev) {
508 unsigned int log_sector_size = BBSIZE;
509
510 if (XFS_SB_VERSION_HASSECTOR(&mp->m_sb))
511 log_sector_size = mp->m_sb.sb_logsectsize;
512 error = xfs_setsize_buftarg(mp->m_logdev_targp,
513 mp->m_sb.sb_blocksize,
514 log_sector_size);
515 }
516 if (!error && rtdev)
517 error = xfs_setsize_buftarg(mp->m_rtdev_targp,
518 mp->m_sb.sb_blocksize,
519 mp->m_sb.sb_sectsize);
520 if (error)
521 goto error2;
522
523 if ((mp->m_flags & XFS_MOUNT_BARRIER) && !(vfsp->vfs_flag & VFS_RDONLY))
524 xfs_mountfs_check_barriers(mp);
525
526 error = XFS_IOINIT(vfsp, args, flags);
527 if (error)
528 goto error2;
529
530 return 0;
531
532 error2:
533 if (mp->m_sb_bp)
534 xfs_freesb(mp);
535 error1:
536 xfs_binval(mp->m_ddev_targp);
537 if (logdev && logdev != ddev)
538 xfs_binval(mp->m_logdev_targp);
539 if (rtdev)
540 xfs_binval(mp->m_rtdev_targp);
541 error0:
542 xfs_unmountfs_close(mp, credp);
543 return error;
544 }
545
546 STATIC int
547 xfs_unmount(
548 bhv_desc_t *bdp,
549 int flags,
550 cred_t *credp)
551 {
552 struct vfs *vfsp = bhvtovfs(bdp);
553 xfs_mount_t *mp = XFS_BHVTOM(bdp);
554 xfs_inode_t *rip;
555 vnode_t *rvp;
556 int unmount_event_wanted = 0;
557 int unmount_event_flags = 0;
558 int xfs_unmountfs_needed = 0;
559 int error;
560
561 rip = mp->m_rootip;
562 rvp = XFS_ITOV(rip);
563
564 if (vfsp->vfs_flag & VFS_DMI) {
565 error = XFS_SEND_PREUNMOUNT(mp, vfsp,
566 rvp, DM_RIGHT_NULL, rvp, DM_RIGHT_NULL,
567 NULL, NULL, 0, 0,
568 (mp->m_dmevmask & (1<<DM_EVENT_PREUNMOUNT))?
569 0:DM_FLAGS_UNWANTED);
570 if (error)
571 return XFS_ERROR(error);
572 unmount_event_wanted = 1;
573 unmount_event_flags = (mp->m_dmevmask & (1<<DM_EVENT_UNMOUNT))?
574 0 : DM_FLAGS_UNWANTED;
575 }
576
577 /*
578 * First blow any referenced inode from this file system
579 * out of the reference cache, and delete the timer.
580 */
581 xfs_refcache_purge_mp(mp);
582
583 XFS_bflush(mp->m_ddev_targp);
584 error = xfs_unmount_flush(mp, 0);
585 if (error)
586 goto out;
587
588 ASSERT(vn_count(rvp) == 1);
589
590 /*
591 * Drop the reference count
592 */
593 VN_RELE(rvp);
594
595 /*
596 * If we're forcing a shutdown, typically because of a media error,
597 * we want to make sure we invalidate dirty pages that belong to
598 * referenced vnodes as well.
599 */
600 if (XFS_FORCED_SHUTDOWN(mp)) {
601 error = xfs_sync(&mp->m_bhv,
602 (SYNC_WAIT | SYNC_CLOSE), credp);
603 ASSERT(error != EFSCORRUPTED);
604 }
605 xfs_unmountfs_needed = 1;
606
607 out:
608 /* Send DMAPI event, if required.
609 * Then do xfs_unmountfs() if needed.
610 * Then return error (or zero).
611 */
612 if (unmount_event_wanted) {
613 /* Note: mp structure must still exist for
614 * XFS_SEND_UNMOUNT() call.
615 */
616 XFS_SEND_UNMOUNT(mp, vfsp, error == 0 ? rvp : NULL,
617 DM_RIGHT_NULL, 0, error, unmount_event_flags);
618 }
619 if (xfs_unmountfs_needed) {
620 /*
621 * Call common unmount function to flush to disk
622 * and free the super block buffer & mount structures.
623 */
624 xfs_unmountfs(mp, credp);
625 }
626
627 return XFS_ERROR(error);
628 }
629
630 STATIC int
631 xfs_quiesce_fs(
632 xfs_mount_t *mp)
633 {
634 int count = 0, pincount;
635
636 xfs_refcache_purge_mp(mp);
637 xfs_flush_buftarg(mp->m_ddev_targp, 0);
638 xfs_finish_reclaim_all(mp, 0);
639
640 /* This loop must run at least twice.
641 * The first instance of the loop will flush
642 * most meta data but that will generate more
643 * meta data (typically directory updates).
644 * Which then must be flushed and logged before
645 * we can write the unmount record.
646 */
647 do {
648 xfs_syncsub(mp, SYNC_REMOUNT|SYNC_ATTR|SYNC_WAIT, 0, NULL);
649 pincount = xfs_flush_buftarg(mp->m_ddev_targp, 1);
650 if (!pincount) {
651 delay(50);
652 count++;
653 }
654 } while (count < 2);
655
656 return 0;
657 }
658
659 STATIC int
660 xfs_mntupdate(
661 bhv_desc_t *bdp,
662 int *flags,
663 struct xfs_mount_args *args)
664 {
665 struct vfs *vfsp = bhvtovfs(bdp);
666 xfs_mount_t *mp = XFS_BHVTOM(bdp);
667 int error;
668
669 if (args->flags & XFSMNT_BARRIER)
670 mp->m_flags |= XFS_MOUNT_BARRIER;
671 else
672 mp->m_flags &= ~XFS_MOUNT_BARRIER;
673
674 if ((vfsp->vfs_flag & VFS_RDONLY) &&
675 !(*flags & MS_RDONLY)) {
676 vfsp->vfs_flag &= ~VFS_RDONLY;
677
678 if (args->flags & XFSMNT_BARRIER)
679 xfs_mountfs_check_barriers(mp);
680 }
681
682 if (!(vfsp->vfs_flag & VFS_RDONLY) &&
683 (*flags & MS_RDONLY)) {
684 VFS_SYNC(vfsp, SYNC_FSDATA|SYNC_BDFLUSH|SYNC_ATTR, NULL, error);
685
686 xfs_quiesce_fs(mp);
687
688 /* Ok now write out an unmount record */
689 xfs_log_unmount_write(mp);
690 xfs_unmountfs_writesb(mp);
691 vfsp->vfs_flag |= VFS_RDONLY;
692 }
693
694 return 0;
695 }
696
697 /*
698 * xfs_unmount_flush implements a set of flush operation on special
699 * inodes, which are needed as a separate set of operations so that
700 * they can be called as part of relocation process.
701 */
702 int
703 xfs_unmount_flush(
704 xfs_mount_t *mp, /* Mount structure we are getting
705 rid of. */
706 int relocation) /* Called from vfs relocation. */
707 {
708 xfs_inode_t *rip = mp->m_rootip;
709 xfs_inode_t *rbmip;
710 xfs_inode_t *rsumip = NULL;
711 vnode_t *rvp = XFS_ITOV(rip);
712 int error;
713
714 xfs_ilock(rip, XFS_ILOCK_EXCL);
715 xfs_iflock(rip);
716
717 /*
718 * Flush out the real time inodes.
719 */
720 if ((rbmip = mp->m_rbmip) != NULL) {
721 xfs_ilock(rbmip, XFS_ILOCK_EXCL);
722 xfs_iflock(rbmip);
723 error = xfs_iflush(rbmip, XFS_IFLUSH_SYNC);
724 xfs_iunlock(rbmip, XFS_ILOCK_EXCL);
725
726 if (error == EFSCORRUPTED)
727 goto fscorrupt_out;
728
729 ASSERT(vn_count(XFS_ITOV(rbmip)) == 1);
730
731 rsumip = mp->m_rsumip;
732 xfs_ilock(rsumip, XFS_ILOCK_EXCL);
733 xfs_iflock(rsumip);
734 error = xfs_iflush(rsumip, XFS_IFLUSH_SYNC);
735 xfs_iunlock(rsumip, XFS_ILOCK_EXCL);
736
737 if (error == EFSCORRUPTED)
738 goto fscorrupt_out;
739
740 ASSERT(vn_count(XFS_ITOV(rsumip)) == 1);
741 }
742
743 /*
744 * Synchronously flush root inode to disk
745 */
746 error = xfs_iflush(rip, XFS_IFLUSH_SYNC);
747 if (error == EFSCORRUPTED)
748 goto fscorrupt_out2;
749
750 if (vn_count(rvp) != 1 && !relocation) {
751 xfs_iunlock(rip, XFS_ILOCK_EXCL);
752 return XFS_ERROR(EBUSY);
753 }
754
755 /*
756 * Release dquot that rootinode, rbmino and rsumino might be holding,
757 * flush and purge the quota inodes.
758 */
759 error = XFS_QM_UNMOUNT(mp);
760 if (error == EFSCORRUPTED)
761 goto fscorrupt_out2;
762
763 if (rbmip) {
764 VN_RELE(XFS_ITOV(rbmip));
765 VN_RELE(XFS_ITOV(rsumip));
766 }
767
768 xfs_iunlock(rip, XFS_ILOCK_EXCL);
769 return 0;
770
771 fscorrupt_out:
772 xfs_ifunlock(rip);
773
774 fscorrupt_out2:
775 xfs_iunlock(rip, XFS_ILOCK_EXCL);
776
777 return XFS_ERROR(EFSCORRUPTED);
778 }
779
780 /*
781 * xfs_root extracts the root vnode from a vfs.
782 *
783 * vfsp -- the vfs struct for the desired file system
784 * vpp -- address of the caller's vnode pointer which should be
785 * set to the desired fs root vnode
786 */
787 STATIC int
788 xfs_root(
789 bhv_desc_t *bdp,
790 vnode_t **vpp)
791 {
792 vnode_t *vp;
793
794 vp = XFS_ITOV((XFS_BHVTOM(bdp))->m_rootip);
795 VN_HOLD(vp);
796 *vpp = vp;
797 return 0;
798 }
799
800 /*
801 * xfs_statvfs
802 *
803 * Fill in the statvfs structure for the given file system. We use
804 * the superblock lock in the mount structure to ensure a consistent
805 * snapshot of the counters returned.
806 */
807 STATIC int
808 xfs_statvfs(
809 bhv_desc_t *bdp,
810 xfs_statfs_t *statp,
811 vnode_t *vp)
812 {
813 __uint64_t fakeinos;
814 xfs_extlen_t lsize;
815 xfs_mount_t *mp;
816 xfs_sb_t *sbp;
817 unsigned long s;
818
819 mp = XFS_BHVTOM(bdp);
820 sbp = &(mp->m_sb);
821
822 statp->f_type = XFS_SB_MAGIC;
823
824 xfs_icsb_sync_counters_lazy(mp);
825 s = XFS_SB_LOCK(mp);
826 statp->f_bsize = sbp->sb_blocksize;
827 lsize = sbp->sb_logstart ? sbp->sb_logblocks : 0;
828 statp->f_blocks = sbp->sb_dblocks - lsize;
829 statp->f_bfree = statp->f_bavail = sbp->sb_fdblocks;
830 fakeinos = statp->f_bfree << sbp->sb_inopblog;
831 #if XFS_BIG_INUMS
832 fakeinos += mp->m_inoadd;
833 #endif
834 statp->f_files =
835 MIN(sbp->sb_icount + fakeinos, (__uint64_t)XFS_MAXINUMBER);
836 if (mp->m_maxicount)
837 #if XFS_BIG_INUMS
838 if (!mp->m_inoadd)
839 #endif
840 statp->f_files = min_t(typeof(statp->f_files),
841 statp->f_files,
842 mp->m_maxicount);
843 statp->f_ffree = statp->f_files - (sbp->sb_icount - sbp->sb_ifree);
844 XFS_SB_UNLOCK(mp, s);
845
846 xfs_statvfs_fsid(statp, mp);
847 statp->f_namelen = MAXNAMELEN - 1;
848
849 return 0;
850 }
851
852
853 /*
854 * xfs_sync flushes any pending I/O to file system vfsp.
855 *
856 * This routine is called by vfs_sync() to make sure that things make it
857 * out to disk eventually, on sync() system calls to flush out everything,
858 * and when the file system is unmounted. For the vfs_sync() case, all
859 * we really need to do is sync out the log to make all of our meta-data
860 * updates permanent (except for timestamps). For calls from pflushd(),
861 * dirty pages are kept moving by calling pdflush() on the inodes
862 * containing them. We also flush the inodes that we can lock without
863 * sleeping and the superblock if we can lock it without sleeping from
864 * vfs_sync() so that items at the tail of the log are always moving out.
865 *
866 * Flags:
867 * SYNC_BDFLUSH - We're being called from vfs_sync() so we don't want
868 * to sleep if we can help it. All we really need
869 * to do is ensure that the log is synced at least
870 * periodically. We also push the inodes and
871 * superblock if we can lock them without sleeping
872 * and they are not pinned.
873 * SYNC_ATTR - We need to flush the inodes. If SYNC_BDFLUSH is not
874 * set, then we really want to lock each inode and flush
875 * it.
876 * SYNC_WAIT - All the flushes that take place in this call should
877 * be synchronous.
878 * SYNC_DELWRI - This tells us to push dirty pages associated with
879 * inodes. SYNC_WAIT and SYNC_BDFLUSH are used to
880 * determine if they should be flushed sync, async, or
881 * delwri.
882 * SYNC_CLOSE - This flag is passed when the system is being
883 * unmounted. We should sync and invalidate everthing.
884 * SYNC_FSDATA - This indicates that the caller would like to make
885 * sure the superblock is safe on disk. We can ensure
886 * this by simply makeing sure the log gets flushed
887 * if SYNC_BDFLUSH is set, and by actually writing it
888 * out otherwise.
889 *
890 */
891 /*ARGSUSED*/
892 STATIC int
893 xfs_sync(
894 bhv_desc_t *bdp,
895 int flags,
896 cred_t *credp)
897 {
898 xfs_mount_t *mp = XFS_BHVTOM(bdp);
899
900 if (unlikely(flags == SYNC_QUIESCE))
901 return xfs_quiesce_fs(mp);
902 else
903 return xfs_syncsub(mp, flags, 0, NULL);
904 }
905
906 /*
907 * xfs sync routine for internal use
908 *
909 * This routine supports all of the flags defined for the generic VFS_SYNC
910 * interface as explained above under xfs_sync. In the interests of not
911 * changing interfaces within the 6.5 family, additional internallly-
912 * required functions are specified within a separate xflags parameter,
913 * only available by calling this routine.
914 *
915 */
916 int
917 xfs_sync_inodes(
918 xfs_mount_t *mp,
919 int flags,
920 int xflags,
921 int *bypassed)
922 {
923 xfs_inode_t *ip = NULL;
924 xfs_inode_t *ip_next;
925 xfs_buf_t *bp;
926 vnode_t *vp = NULL;
927 int error;
928 int last_error;
929 uint64_t fflag;
930 uint lock_flags;
931 uint base_lock_flags;
932 boolean_t mount_locked;
933 boolean_t vnode_refed;
934 int preempt;
935 xfs_dinode_t *dip;
936 xfs_iptr_t *ipointer;
937 #ifdef DEBUG
938 boolean_t ipointer_in = B_FALSE;
939
940 #define IPOINTER_SET ipointer_in = B_TRUE
941 #define IPOINTER_CLR ipointer_in = B_FALSE
942 #else
943 #define IPOINTER_SET
944 #define IPOINTER_CLR
945 #endif
946
947
948 /* Insert a marker record into the inode list after inode ip. The list
949 * must be locked when this is called. After the call the list will no
950 * longer be locked.
951 */
952 #define IPOINTER_INSERT(ip, mp) { \
953 ASSERT(ipointer_in == B_FALSE); \
954 ipointer->ip_mnext = ip->i_mnext; \
955 ipointer->ip_mprev = ip; \
956 ip->i_mnext = (xfs_inode_t *)ipointer; \
957 ipointer->ip_mnext->i_mprev = (xfs_inode_t *)ipointer; \
958 preempt = 0; \
959 XFS_MOUNT_IUNLOCK(mp); \
960 mount_locked = B_FALSE; \
961 IPOINTER_SET; \
962 }
963
964 /* Remove the marker from the inode list. If the marker was the only item
965 * in the list then there are no remaining inodes and we should zero out
966 * the whole list. If we are the current head of the list then move the head
967 * past us.
968 */
969 #define IPOINTER_REMOVE(ip, mp) { \
970 ASSERT(ipointer_in == B_TRUE); \
971 if (ipointer->ip_mnext != (xfs_inode_t *)ipointer) { \
972 ip = ipointer->ip_mnext; \
973 ip->i_mprev = ipointer->ip_mprev; \
974 ipointer->ip_mprev->i_mnext = ip; \
975 if (mp->m_inodes == (xfs_inode_t *)ipointer) { \
976 mp->m_inodes = ip; \
977 } \
978 } else { \
979 ASSERT(mp->m_inodes == (xfs_inode_t *)ipointer); \
980 mp->m_inodes = NULL; \
981 ip = NULL; \
982 } \
983 IPOINTER_CLR; \
984 }
985
986 #define XFS_PREEMPT_MASK 0x7f
987
988 if (bypassed)
989 *bypassed = 0;
990 if (XFS_MTOVFS(mp)->vfs_flag & VFS_RDONLY)
991 return 0;
992 error = 0;
993 last_error = 0;
994 preempt = 0;
995
996 /* Allocate a reference marker */
997 ipointer = (xfs_iptr_t *)kmem_zalloc(sizeof(xfs_iptr_t), KM_SLEEP);
998
999 fflag = XFS_B_ASYNC; /* default is don't wait */
1000 if (flags & (SYNC_BDFLUSH | SYNC_DELWRI))
1001 fflag = XFS_B_DELWRI;
1002 if (flags & SYNC_WAIT)
1003 fflag = 0; /* synchronous overrides all */
1004
1005 base_lock_flags = XFS_ILOCK_SHARED;
1006 if (flags & (SYNC_DELWRI | SYNC_CLOSE)) {
1007 /*
1008 * We need the I/O lock if we're going to call any of
1009 * the flush/inval routines.
1010 */
1011 base_lock_flags |= XFS_IOLOCK_SHARED;
1012 }
1013
1014 XFS_MOUNT_ILOCK(mp);
1015
1016 ip = mp->m_inodes;
1017
1018 mount_locked = B_TRUE;
1019 vnode_refed = B_FALSE;
1020
1021 IPOINTER_CLR;
1022
1023 do {
1024 ASSERT(ipointer_in == B_FALSE);
1025 ASSERT(vnode_refed == B_FALSE);
1026
1027 lock_flags = base_lock_flags;
1028
1029 /*
1030 * There were no inodes in the list, just break out
1031 * of the loop.
1032 */
1033 if (ip == NULL) {
1034 break;
1035 }
1036
1037 /*
1038 * We found another sync thread marker - skip it
1039 */
1040 if (ip->i_mount == NULL) {
1041 ip = ip->i_mnext;
1042 continue;
1043 }
1044
1045 vp = XFS_ITOV_NULL(ip);
1046
1047 /*
1048 * If the vnode is gone then this is being torn down,
1049 * call reclaim if it is flushed, else let regular flush
1050 * code deal with it later in the loop.
1051 */
1052
1053 if (vp == NULL) {
1054 /* Skip ones already in reclaim */
1055 if (ip->i_flags & XFS_IRECLAIM) {
1056 ip = ip->i_mnext;
1057 continue;
1058 }
1059 if (xfs_ilock_nowait(ip, XFS_ILOCK_EXCL) == 0) {
1060 ip = ip->i_mnext;
1061 } else if ((xfs_ipincount(ip) == 0) &&
1062 xfs_iflock_nowait(ip)) {
1063 IPOINTER_INSERT(ip, mp);
1064
1065 xfs_finish_reclaim(ip, 1,
1066 XFS_IFLUSH_DELWRI_ELSE_ASYNC);
1067
1068 XFS_MOUNT_ILOCK(mp);
1069 mount_locked = B_TRUE;
1070 IPOINTER_REMOVE(ip, mp);
1071 } else {
1072 xfs_iunlock(ip, XFS_ILOCK_EXCL);
1073 ip = ip->i_mnext;
1074 }
1075 continue;
1076 }
1077
1078 if (VN_BAD(vp)) {
1079 ip = ip->i_mnext;
1080 continue;
1081 }
1082
1083 if (XFS_FORCED_SHUTDOWN(mp) && !(flags & SYNC_CLOSE)) {
1084 XFS_MOUNT_IUNLOCK(mp);
1085 kmem_free(ipointer, sizeof(xfs_iptr_t));
1086 return 0;
1087 }
1088
1089 /*
1090 * If this is just vfs_sync() or pflushd() calling
1091 * then we can skip inodes for which it looks like
1092 * there is nothing to do. Since we don't have the
1093 * inode locked this is racey, but these are periodic
1094 * calls so it doesn't matter. For the others we want
1095 * to know for sure, so we at least try to lock them.
1096 */
1097 if (flags & SYNC_BDFLUSH) {
1098 if (((ip->i_itemp == NULL) ||
1099 !(ip->i_itemp->ili_format.ilf_fields &
1100 XFS_ILOG_ALL)) &&
1101 (ip->i_update_core == 0)) {
1102 ip = ip->i_mnext;
1103 continue;
1104 }
1105 }
1106
1107 /*
1108 * Try to lock without sleeping. We're out of order with
1109 * the inode list lock here, so if we fail we need to drop
1110 * the mount lock and try again. If we're called from
1111 * bdflush() here, then don't bother.
1112 *
1113 * The inode lock here actually coordinates with the
1114 * almost spurious inode lock in xfs_ireclaim() to prevent
1115 * the vnode we handle here without a reference from
1116 * being freed while we reference it. If we lock the inode
1117 * while it's on the mount list here, then the spurious inode
1118 * lock in xfs_ireclaim() after the inode is pulled from
1119 * the mount list will sleep until we release it here.
1120 * This keeps the vnode from being freed while we reference
1121 * it.
1122 */
1123 if (xfs_ilock_nowait(ip, lock_flags) == 0) {
1124 if ((flags & SYNC_BDFLUSH) || (vp == NULL)) {
1125 ip = ip->i_mnext;
1126 continue;
1127 }
1128
1129 vp = vn_grab(vp);
1130 if (vp == NULL) {
1131 ip = ip->i_mnext;
1132 continue;
1133 }
1134
1135 IPOINTER_INSERT(ip, mp);
1136 xfs_ilock(ip, lock_flags);
1137
1138 ASSERT(vp == XFS_ITOV(ip));
1139 ASSERT(ip->i_mount == mp);
1140
1141 vnode_refed = B_TRUE;
1142 }
1143
1144 /* From here on in the loop we may have a marker record
1145 * in the inode list.
1146 */
1147
1148 if ((flags & SYNC_CLOSE) && (vp != NULL)) {
1149 /*
1150 * This is the shutdown case. We just need to
1151 * flush and invalidate all the pages associated
1152 * with the inode. Drop the inode lock since
1153 * we can't hold it across calls to the buffer
1154 * cache.
1155 *
1156 * We don't set the VREMAPPING bit in the vnode
1157 * here, because we don't hold the vnode lock
1158 * exclusively. It doesn't really matter, though,
1159 * because we only come here when we're shutting
1160 * down anyway.
1161 */
1162 xfs_iunlock(ip, XFS_ILOCK_SHARED);
1163
1164 if (XFS_FORCED_SHUTDOWN(mp)) {
1165 VOP_TOSS_PAGES(vp, 0, -1, FI_REMAPF);
1166 } else {
1167 VOP_FLUSHINVAL_PAGES(vp, 0, -1, FI_REMAPF);
1168 }
1169
1170 xfs_ilock(ip, XFS_ILOCK_SHARED);
1171
1172 } else if ((flags & SYNC_DELWRI) && (vp != NULL)) {
1173 if (VN_DIRTY(vp)) {
1174 /* We need to have dropped the lock here,
1175 * so insert a marker if we have not already
1176 * done so.
1177 */
1178 if (mount_locked) {
1179 IPOINTER_INSERT(ip, mp);
1180 }
1181
1182 /*
1183 * Drop the inode lock since we can't hold it
1184 * across calls to the buffer cache.
1185 */
1186 xfs_iunlock(ip, XFS_ILOCK_SHARED);
1187 VOP_FLUSH_PAGES(vp, (xfs_off_t)0, -1,
1188 fflag, FI_NONE, error);
1189 xfs_ilock(ip, XFS_ILOCK_SHARED);
1190 }
1191
1192 }
1193
1194 if (flags & SYNC_BDFLUSH) {
1195 if ((flags & SYNC_ATTR) &&
1196 ((ip->i_update_core) ||
1197 ((ip->i_itemp != NULL) &&
1198 (ip->i_itemp->ili_format.ilf_fields != 0)))) {
1199
1200 /* Insert marker and drop lock if not already
1201 * done.
1202 */
1203 if (mount_locked) {
1204 IPOINTER_INSERT(ip, mp);
1205 }
1206
1207 /*
1208 * We don't want the periodic flushing of the
1209 * inodes by vfs_sync() to interfere with
1210 * I/O to the file, especially read I/O
1211 * where it is only the access time stamp
1212 * that is being flushed out. To prevent
1213 * long periods where we have both inode
1214 * locks held shared here while reading the
1215 * inode's buffer in from disk, we drop the
1216 * inode lock while reading in the inode
1217 * buffer. We have to release the buffer
1218 * and reacquire the inode lock so that they
1219 * are acquired in the proper order (inode
1220 * locks first). The buffer will go at the
1221 * end of the lru chain, though, so we can
1222 * expect it to still be there when we go
1223 * for it again in xfs_iflush().
1224 */
1225 if ((xfs_ipincount(ip) == 0) &&
1226 xfs_iflock_nowait(ip)) {
1227
1228 xfs_ifunlock(ip);
1229 xfs_iunlock(ip, XFS_ILOCK_SHARED);
1230
1231 error = xfs_itobp(mp, NULL, ip,
1232 &dip, &bp, 0, 0);
1233 if (!error) {
1234 xfs_buf_relse(bp);
1235 } else {
1236 /* Bailing out, remove the
1237 * marker and free it.
1238 */
1239 XFS_MOUNT_ILOCK(mp);
1240
1241 IPOINTER_REMOVE(ip, mp);
1242
1243 XFS_MOUNT_IUNLOCK(mp);
1244
1245 ASSERT(!(lock_flags &
1246 XFS_IOLOCK_SHARED));
1247
1248 kmem_free(ipointer,
1249 sizeof(xfs_iptr_t));
1250 return (0);
1251 }
1252
1253 /*
1254 * Since we dropped the inode lock,
1255 * the inode may have been reclaimed.
1256 * Therefore, we reacquire the mount
1257 * lock and check to see if we were the
1258 * inode reclaimed. If this happened
1259 * then the ipointer marker will no
1260 * longer point back at us. In this
1261 * case, move ip along to the inode
1262 * after the marker, remove the marker
1263 * and continue.
1264 */
1265 XFS_MOUNT_ILOCK(mp);
1266 mount_locked = B_TRUE;
1267
1268 if (ip != ipointer->ip_mprev) {
1269 IPOINTER_REMOVE(ip, mp);
1270
1271 ASSERT(!vnode_refed);
1272 ASSERT(!(lock_flags &
1273 XFS_IOLOCK_SHARED));
1274 continue;
1275 }
1276
1277 ASSERT(ip->i_mount == mp);
1278
1279 if (xfs_ilock_nowait(ip,
1280 XFS_ILOCK_SHARED) == 0) {
1281 ASSERT(ip->i_mount == mp);
1282 /*
1283 * We failed to reacquire
1284 * the inode lock without
1285 * sleeping, so just skip
1286 * the inode for now. We
1287 * clear the ILOCK bit from
1288 * the lock_flags so that we
1289 * won't try to drop a lock
1290 * we don't hold below.
1291 */
1292 lock_flags &= ~XFS_ILOCK_SHARED;
1293 IPOINTER_REMOVE(ip_next, mp);
1294 } else if ((xfs_ipincount(ip) == 0) &&
1295 xfs_iflock_nowait(ip)) {
1296 ASSERT(ip->i_mount == mp);
1297 /*
1298 * Since this is vfs_sync()
1299 * calling we only flush the
1300 * inode out if we can lock
1301 * it without sleeping and
1302 * it is not pinned. Drop
1303 * the mount lock here so
1304 * that we don't hold it for
1305 * too long. We already have
1306 * a marker in the list here.
1307 */
1308 XFS_MOUNT_IUNLOCK(mp);
1309 mount_locked = B_FALSE;
1310 error = xfs_iflush(ip,
1311 XFS_IFLUSH_DELWRI);
1312 } else {
1313 ASSERT(ip->i_mount == mp);
1314 IPOINTER_REMOVE(ip_next, mp);
1315 }
1316 }
1317
1318 }
1319
1320 } else {
1321 if ((flags & SYNC_ATTR) &&
1322 ((ip->i_update_core) ||
1323 ((ip->i_itemp != NULL) &&
1324 (ip->i_itemp->ili_format.ilf_fields != 0)))) {
1325 if (mount_locked) {
1326 IPOINTER_INSERT(ip, mp);
1327 }
1328
1329 if (flags & SYNC_WAIT) {
1330 xfs_iflock(ip);
1331 error = xfs_iflush(ip,
1332 XFS_IFLUSH_SYNC);
1333 } else {
1334 /*
1335 * If we can't acquire the flush
1336 * lock, then the inode is already
1337 * being flushed so don't bother
1338 * waiting. If we can lock it then
1339 * do a delwri flush so we can
1340 * combine multiple inode flushes
1341 * in each disk write.
1342 */
1343 if (xfs_iflock_nowait(ip)) {
1344 error = xfs_iflush(ip,
1345 XFS_IFLUSH_DELWRI);
1346 }
1347 else if (bypassed)
1348 (*bypassed)++;
1349 }
1350 }
1351 }
1352
1353 if (lock_flags != 0) {
1354 xfs_iunlock(ip, lock_flags);
1355 }
1356
1357 if (vnode_refed) {
1358 /*
1359 * If we had to take a reference on the vnode
1360 * above, then wait until after we've unlocked
1361 * the inode to release the reference. This is
1362 * because we can be already holding the inode
1363 * lock when VN_RELE() calls xfs_inactive().
1364 *
1365 * Make sure to drop the mount lock before calling
1366 * VN_RELE() so that we don't trip over ourselves if
1367 * we have to go for the mount lock again in the
1368 * inactive code.
1369 */
1370 if (mount_locked) {
1371 IPOINTER_INSERT(ip, mp);
1372 }
1373
1374 VN_RELE(vp);
1375
1376 vnode_refed = B_FALSE;
1377 }
1378
1379 if (error) {
1380 last_error = error;
1381 }
1382
1383 /*
1384 * bail out if the filesystem is corrupted.
1385 */
1386 if (error == EFSCORRUPTED) {
1387 if (!mount_locked) {
1388 XFS_MOUNT_ILOCK(mp);
1389 IPOINTER_REMOVE(ip, mp);
1390 }
1391 XFS_MOUNT_IUNLOCK(mp);
1392 ASSERT(ipointer_in == B_FALSE);
1393 kmem_free(ipointer, sizeof(xfs_iptr_t));
1394 return XFS_ERROR(error);
1395 }
1396
1397 /* Let other threads have a chance at the mount lock
1398 * if we have looped many times without dropping the
1399 * lock.
1400 */
1401 if ((++preempt & XFS_PREEMPT_MASK) == 0) {
1402 if (mount_locked) {
1403 IPOINTER_INSERT(ip, mp);
1404 }
1405 }
1406
1407 if (mount_locked == B_FALSE) {
1408 XFS_MOUNT_ILOCK(mp);
1409 mount_locked = B_TRUE;
1410 IPOINTER_REMOVE(ip, mp);
1411 continue;
1412 }
1413
1414 ASSERT(ipointer_in == B_FALSE);
1415 ip = ip->i_mnext;
1416
1417 } while (ip != mp->m_inodes);
1418
1419 XFS_MOUNT_IUNLOCK(mp);
1420
1421 ASSERT(ipointer_in == B_FALSE);
1422
1423 kmem_free(ipointer, sizeof(xfs_iptr_t));
1424 return XFS_ERROR(last_error);
1425 }
1426
1427 /*
1428 * xfs sync routine for internal use
1429 *
1430 * This routine supports all of the flags defined for the generic VFS_SYNC
1431 * interface as explained above under xfs_sync. In the interests of not
1432 * changing interfaces within the 6.5 family, additional internallly-
1433 * required functions are specified within a separate xflags parameter,
1434 * only available by calling this routine.
1435 *
1436 */
1437 int
1438 xfs_syncsub(
1439 xfs_mount_t *mp,
1440 int flags,
1441 int xflags,
1442 int *bypassed)
1443 {
1444 int error = 0;
1445 int last_error = 0;
1446 uint log_flags = XFS_LOG_FORCE;
1447 xfs_buf_t *bp;
1448 xfs_buf_log_item_t *bip;
1449
1450 /*
1451 * Sync out the log. This ensures that the log is periodically
1452 * flushed even if there is not enough activity to fill it up.
1453 */
1454 if (flags & SYNC_WAIT)
1455 log_flags |= XFS_LOG_SYNC;
1456
1457 xfs_log_force(mp, (xfs_lsn_t)0, log_flags);
1458
1459 if (flags & (SYNC_ATTR|SYNC_DELWRI)) {
1460 if (flags & SYNC_BDFLUSH)
1461 xfs_finish_reclaim_all(mp, 1);
1462 else
1463 error = xfs_sync_inodes(mp, flags, xflags, bypassed);
1464 }
1465
1466 /*
1467 * Flushing out dirty data above probably generated more
1468 * log activity, so if this isn't vfs_sync() then flush
1469 * the log again.
1470 */
1471 if (flags & SYNC_DELWRI) {
1472 xfs_log_force(mp, (xfs_lsn_t)0, log_flags);
1473 }
1474
1475 if (flags & SYNC_FSDATA) {
1476 /*
1477 * If this is vfs_sync() then only sync the superblock
1478 * if we can lock it without sleeping and it is not pinned.
1479 */
1480 if (flags & SYNC_BDFLUSH) {
1481 bp = xfs_getsb(mp, XFS_BUF_TRYLOCK);
1482 if (bp != NULL) {
1483 bip = XFS_BUF_FSPRIVATE(bp,xfs_buf_log_item_t*);
1484 if ((bip != NULL) &&
1485 xfs_buf_item_dirty(bip)) {
1486 if (!(XFS_BUF_ISPINNED(bp))) {
1487 XFS_BUF_ASYNC(bp);
1488 error = xfs_bwrite(mp, bp);
1489 } else {
1490 xfs_buf_relse(bp);
1491 }
1492 } else {
1493 xfs_buf_relse(bp);
1494 }
1495 }
1496 } else {
1497 bp = xfs_getsb(mp, 0);
1498 /*
1499 * If the buffer is pinned then push on the log so
1500 * we won't get stuck waiting in the write for
1501 * someone, maybe ourselves, to flush the log.
1502 * Even though we just pushed the log above, we
1503 * did not have the superblock buffer locked at
1504 * that point so it can become pinned in between
1505 * there and here.
1506 */
1507 if (XFS_BUF_ISPINNED(bp))
1508 xfs_log_force(mp, (xfs_lsn_t)0, XFS_LOG_FORCE);
1509 if (flags & SYNC_WAIT)
1510 XFS_BUF_UNASYNC(bp);
1511 else
1512 XFS_BUF_ASYNC(bp);
1513 error = xfs_bwrite(mp, bp);
1514 }
1515 if (error) {
1516 last_error = error;
1517 }
1518 }
1519
1520 /*
1521 * If this is the periodic sync, then kick some entries out of
1522 * the reference cache. This ensures that idle entries are
1523 * eventually kicked out of the cache.
1524 */
1525 if (flags & SYNC_REFCACHE) {
1526 if (flags & SYNC_WAIT)
1527 xfs_refcache_purge_mp(mp);
1528 else
1529 xfs_refcache_purge_some(mp);
1530 }
1531
1532 /*
1533 * Now check to see if the log needs a "dummy" transaction.
1534 */
1535
1536 if (!(flags & SYNC_REMOUNT) && xfs_log_need_covered(mp)) {
1537 xfs_trans_t *tp;
1538 xfs_inode_t *ip;
1539
1540 /*
1541 * Put a dummy transaction in the log to tell
1542 * recovery that all others are OK.
1543 */
1544 tp = xfs_trans_alloc(mp, XFS_TRANS_DUMMY1);
1545 if ((error = xfs_trans_reserve(tp, 0,
1546 XFS_ICHANGE_LOG_RES(mp),
1547 0, 0, 0))) {
1548 xfs_trans_cancel(tp, 0);
1549 return error;
1550 }
1551
1552 ip = mp->m_rootip;
1553 xfs_ilock(ip, XFS_ILOCK_EXCL);
1554
1555 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
1556 xfs_trans_ihold(tp, ip);
1557 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1558 error = xfs_trans_commit(tp, 0, NULL);
1559 xfs_iunlock(ip, XFS_ILOCK_EXCL);
1560 xfs_log_force(mp, (xfs_lsn_t)0, log_flags);
1561 }
1562
1563 /*
1564 * When shutting down, we need to insure that the AIL is pushed
1565 * to disk or the filesystem can appear corrupt from the PROM.
1566 */
1567 if ((flags & (SYNC_CLOSE|SYNC_WAIT)) == (SYNC_CLOSE|SYNC_WAIT)) {
1568 XFS_bflush(mp->m_ddev_targp);
1569 if (mp->m_rtdev_targp) {
1570 XFS_bflush(mp->m_rtdev_targp);
1571 }
1572 }
1573
1574 return XFS_ERROR(last_error);
1575 }
1576
1577 /*
1578 * xfs_vget - called by DMAPI and NFSD to get vnode from file handle
1579 */
1580 STATIC int
1581 xfs_vget(
1582 bhv_desc_t *bdp,
1583 vnode_t **vpp,
1584 fid_t *fidp)
1585 {
1586 xfs_mount_t *mp = XFS_BHVTOM(bdp);
1587 xfs_fid_t *xfid = (struct xfs_fid *)fidp;
1588 xfs_inode_t *ip;
1589 int error;
1590 xfs_ino_t ino;
1591 unsigned int igen;
1592
1593 /*
1594 * Invalid. Since handles can be created in user space and passed in
1595 * via gethandle(), this is not cause for a panic.
1596 */
1597 if (xfid->xfs_fid_len != sizeof(*xfid) - sizeof(xfid->xfs_fid_len))
1598 return XFS_ERROR(EINVAL);
1599
1600 ino = xfid->xfs_fid_ino;
1601 igen = xfid->xfs_fid_gen;
1602
1603 /*
1604 * NFS can sometimes send requests for ino 0. Fail them gracefully.
1605 */
1606 if (ino == 0)
1607 return XFS_ERROR(ESTALE);
1608
1609 error = xfs_iget(mp, NULL, ino, 0, XFS_ILOCK_SHARED, &ip, 0);
1610 if (error) {
1611 *vpp = NULL;
1612 return error;
1613 }
1614
1615 if (ip == NULL) {
1616 *vpp = NULL;
1617 return XFS_ERROR(EIO);
1618 }
1619
1620 if (ip->i_d.di_mode == 0 || ip->i_d.di_gen != igen) {
1621 xfs_iput_new(ip, XFS_ILOCK_SHARED);
1622 *vpp = NULL;
1623 return XFS_ERROR(ENOENT);
1624 }
1625
1626 *vpp = XFS_ITOV(ip);
1627 xfs_iunlock(ip, XFS_ILOCK_SHARED);
1628 return 0;
1629 }
1630
1631
1632 #define MNTOPT_LOGBUFS "logbufs" /* number of XFS log buffers */
1633 #define MNTOPT_LOGBSIZE "logbsize" /* size of XFS log buffers */
1634 #define MNTOPT_LOGDEV "logdev" /* log device */
1635 #define MNTOPT_RTDEV "rtdev" /* realtime I/O device */
1636 #define MNTOPT_BIOSIZE "biosize" /* log2 of preferred buffered io size */
1637 #define MNTOPT_WSYNC "wsync" /* safe-mode nfs compatible mount */
1638 #define MNTOPT_INO64 "ino64" /* force inodes into 64-bit range */
1639 #define MNTOPT_NOALIGN "noalign" /* turn off stripe alignment */
1640 #define MNTOPT_SWALLOC "swalloc" /* turn on stripe width allocation */
1641 #define MNTOPT_SUNIT "sunit" /* data volume stripe unit */
1642 #define MNTOPT_SWIDTH "swidth" /* data volume stripe width */
1643 #define MNTOPT_NOUUID "nouuid" /* ignore filesystem UUID */
1644 #define MNTOPT_MTPT "mtpt" /* filesystem mount point */
1645 #define MNTOPT_GRPID "grpid" /* group-ID from parent directory */
1646 #define MNTOPT_NOGRPID "nogrpid" /* group-ID from current process */
1647 #define MNTOPT_BSDGROUPS "bsdgroups" /* group-ID from parent directory */
1648 #define MNTOPT_SYSVGROUPS "sysvgroups" /* group-ID from current process */
1649 #define MNTOPT_ALLOCSIZE "allocsize" /* preferred allocation size */
1650 #define MNTOPT_IHASHSIZE "ihashsize" /* size of inode hash table */
1651 #define MNTOPT_NORECOVERY "norecovery" /* don't run XFS recovery */
1652 #define MNTOPT_BARRIER "barrier" /* use writer barriers for log write and
1653 * unwritten extent conversion */
1654 #define MNTOPT_NOBARRIER "nobarrier" /* .. disable */
1655 #define MNTOPT_OSYNCISOSYNC "osyncisosync" /* o_sync is REALLY o_sync */
1656 #define MNTOPT_64BITINODE "inode64" /* inodes can be allocated anywhere */
1657 #define MNTOPT_IKEEP "ikeep" /* do not free empty inode clusters */
1658 #define MNTOPT_NOIKEEP "noikeep" /* free empty inode clusters */
1659 #define MNTOPT_LARGEIO "largeio" /* report large I/O sizes in stat() */
1660 #define MNTOPT_NOLARGEIO "nolargeio" /* do not report large I/O sizes
1661 * in stat(). */
1662 #define MNTOPT_ATTR2 "attr2" /* do use attr2 attribute format */
1663 #define MNTOPT_NOATTR2 "noattr2" /* do not use attr2 attribute format */
1664
1665 STATIC unsigned long
1666 suffix_strtoul(const char *cp, char **endp, unsigned int base)
1667 {
1668 int last, shift_left_factor = 0;
1669 char *value = (char *)cp;
1670
1671 last = strlen(value) - 1;
1672 if (value[last] == 'K' || value[last] == 'k') {
1673 shift_left_factor = 10;
1674 value[last] = '\0';
1675 }
1676 if (value[last] == 'M' || value[last] == 'm') {
1677 shift_left_factor = 20;
1678 value[last] = '\0';
1679 }
1680 if (value[last] == 'G' || value[last] == 'g') {
1681 shift_left_factor = 30;
1682 value[last] = '\0';
1683 }
1684
1685 return simple_strtoul(cp, endp, base) << shift_left_factor;
1686 }
1687
1688 STATIC int
1689 xfs_parseargs(
1690 struct bhv_desc *bhv,
1691 char *options,
1692 struct xfs_mount_args *args,
1693 int update)
1694 {
1695 struct vfs *vfsp = bhvtovfs(bhv);
1696 char *this_char, *value, *eov;
1697 int dsunit, dswidth, vol_dsunit, vol_dswidth;
1698 int iosize;
1699
1700 args->flags2 |= XFSMNT2_COMPAT_IOSIZE;
1701 args->flags |= XFSMNT_IDELETE;
1702
1703 if (!options)
1704 goto done;
1705
1706 iosize = dsunit = dswidth = vol_dsunit = vol_dswidth = 0;
1707
1708 while ((this_char = strsep(&options, ",")) != NULL) {
1709 if (!*this_char)
1710 continue;
1711 if ((value = strchr(this_char, '=')) != NULL)
1712 *value++ = 0;
1713
1714 if (!strcmp(this_char, MNTOPT_LOGBUFS)) {
1715 if (!value || !*value) {
1716 printk("XFS: %s option requires an argument\n",
1717 this_char);
1718 return EINVAL;
1719 }
1720 args->logbufs = simple_strtoul(value, &eov, 10);
1721 } else if (!strcmp(this_char, MNTOPT_LOGBSIZE)) {
1722 if (!value || !*value) {
1723 printk("XFS: %s option requires an argument\n",
1724 this_char);
1725 return EINVAL;
1726 }
1727 args->logbufsize = suffix_strtoul(value, &eov, 10);
1728 } else if (!strcmp(this_char, MNTOPT_LOGDEV)) {
1729 if (!value || !*value) {
1730 printk("XFS: %s option requires an argument\n",
1731 this_char);
1732 return EINVAL;
1733 }
1734 strncpy(args->logname, value, MAXNAMELEN);
1735 } else if (!strcmp(this_char, MNTOPT_MTPT)) {
1736 if (!value || !*value) {
1737 printk("XFS: %s option requires an argument\n",
1738 this_char);
1739 return EINVAL;
1740 }
1741 strncpy(args->mtpt, value, MAXNAMELEN);
1742 } else if (!strcmp(this_char, MNTOPT_RTDEV)) {
1743 if (!value || !*value) {
1744 printk("XFS: %s option requires an argument\n",
1745 this_char);
1746 return EINVAL;
1747 }
1748 strncpy(args->rtname, value, MAXNAMELEN);
1749 } else if (!strcmp(this_char, MNTOPT_BIOSIZE)) {
1750 if (!value || !*value) {
1751 printk("XFS: %s option requires an argument\n",
1752 this_char);
1753 return EINVAL;
1754 }
1755 iosize = simple_strtoul(value, &eov, 10);
1756 args->flags |= XFSMNT_IOSIZE;
1757 args->iosizelog = (uint8_t) iosize;
1758 } else if (!strcmp(this_char, MNTOPT_ALLOCSIZE)) {
1759 if (!value || !*value) {
1760 printk("XFS: %s option requires an argument\n",
1761 this_char);
1762 return EINVAL;
1763 }
1764 iosize = suffix_strtoul(value, &eov, 10);
1765 args->flags |= XFSMNT_IOSIZE;
1766 args->iosizelog = ffs(iosize) - 1;
1767 } else if (!strcmp(this_char, MNTOPT_IHASHSIZE)) {
1768 if (!value || !*value) {
1769 printk("XFS: %s option requires an argument\n",
1770 this_char);
1771 return EINVAL;
1772 }
1773 args->flags |= XFSMNT_IHASHSIZE;
1774 args->ihashsize = simple_strtoul(value, &eov, 10);
1775 } else if (!strcmp(this_char, MNTOPT_GRPID) ||
1776 !strcmp(this_char, MNTOPT_BSDGROUPS)) {
1777 vfsp->vfs_flag |= VFS_GRPID;
1778 } else if (!strcmp(this_char, MNTOPT_NOGRPID) ||
1779 !strcmp(this_char, MNTOPT_SYSVGROUPS)) {
1780 vfsp->vfs_flag &= ~VFS_GRPID;
1781 } else if (!strcmp(this_char, MNTOPT_WSYNC)) {
1782 args->flags |= XFSMNT_WSYNC;
1783 } else if (!strcmp(this_char, MNTOPT_OSYNCISOSYNC)) {
1784 args->flags |= XFSMNT_OSYNCISOSYNC;
1785 } else if (!strcmp(this_char, MNTOPT_NORECOVERY)) {
1786 args->flags |= XFSMNT_NORECOVERY;
1787 } else if (!strcmp(this_char, MNTOPT_INO64)) {
1788 args->flags |= XFSMNT_INO64;
1789 #if !XFS_BIG_INUMS
1790 printk("XFS: %s option not allowed on this system\n",
1791 this_char);
1792 return EINVAL;
1793 #endif
1794 } else if (!strcmp(this_char, MNTOPT_NOALIGN)) {
1795 args->flags |= XFSMNT_NOALIGN;
1796 } else if (!strcmp(this_char, MNTOPT_SWALLOC)) {
1797 args->flags |= XFSMNT_SWALLOC;
1798 } else if (!strcmp(this_char, MNTOPT_SUNIT)) {
1799 if (!value || !*value) {
1800 printk("XFS: %s option requires an argument\n",
1801 this_char);
1802 return EINVAL;
1803 }
1804 dsunit = simple_strtoul(value, &eov, 10);
1805 } else if (!strcmp(this_char, MNTOPT_SWIDTH)) {
1806 if (!value || !*value) {
1807 printk("XFS: %s option requires an argument\n",
1808 this_char);
1809 return EINVAL;
1810 }
1811 dswidth = simple_strtoul(value, &eov, 10);
1812 } else if (!strcmp(this_char, MNTOPT_64BITINODE)) {
1813 args->flags &= ~XFSMNT_32BITINODES;
1814 #if !XFS_BIG_INUMS
1815 printk("XFS: %s option not allowed on this system\n",
1816 this_char);
1817 return EINVAL;
1818 #endif
1819 } else if (!strcmp(this_char, MNTOPT_NOUUID)) {
1820 args->flags |= XFSMNT_NOUUID;
1821 } else if (!strcmp(this_char, MNTOPT_BARRIER)) {
1822 args->flags |= XFSMNT_BARRIER;
1823 } else if (!strcmp(this_char, MNTOPT_NOBARRIER)) {
1824 args->flags &= ~XFSMNT_BARRIER;
1825 } else if (!strcmp(this_char, MNTOPT_IKEEP)) {
1826 args->flags &= ~XFSMNT_IDELETE;
1827 } else if (!strcmp(this_char, MNTOPT_NOIKEEP)) {
1828 args->flags |= XFSMNT_IDELETE;
1829 } else if (!strcmp(this_char, MNTOPT_LARGEIO)) {
1830 args->flags2 &= ~XFSMNT2_COMPAT_IOSIZE;
1831 } else if (!strcmp(this_char, MNTOPT_NOLARGEIO)) {
1832 args->flags2 |= XFSMNT2_COMPAT_IOSIZE;
1833 } else if (!strcmp(this_char, MNTOPT_ATTR2)) {
1834 args->flags |= XFSMNT_ATTR2;
1835 } else if (!strcmp(this_char, MNTOPT_NOATTR2)) {
1836 args->flags &= ~XFSMNT_ATTR2;
1837 } else if (!strcmp(this_char, "osyncisdsync")) {
1838 /* no-op, this is now the default */
1839 printk("XFS: osyncisdsync is now the default, option is deprecated.\n");
1840 } else if (!strcmp(this_char, "irixsgid")) {
1841 printk("XFS: irixsgid is now a sysctl(2) variable, option is deprecated.\n");
1842 } else {
1843 printk("XFS: unknown mount option [%s].\n", this_char);
1844 return EINVAL;
1845 }
1846 }
1847
1848 if (args->flags & XFSMNT_NORECOVERY) {
1849 if ((vfsp->vfs_flag & VFS_RDONLY) == 0) {
1850 printk("XFS: no-recovery mounts must be read-only.\n");
1851 return EINVAL;
1852 }
1853 }
1854
1855 if ((args->flags & XFSMNT_NOALIGN) && (dsunit || dswidth)) {
1856 printk(
1857 "XFS: sunit and swidth options incompatible with the noalign option\n");
1858 return EINVAL;
1859 }
1860
1861 if ((dsunit && !dswidth) || (!dsunit && dswidth)) {
1862 printk("XFS: sunit and swidth must be specified together\n");
1863 return EINVAL;
1864 }
1865
1866 if (dsunit && (dswidth % dsunit != 0)) {
1867 printk(
1868 "XFS: stripe width (%d) must be a multiple of the stripe unit (%d)\n",
1869 dswidth, dsunit);
1870 return EINVAL;
1871 }
1872
1873 if ((args->flags & XFSMNT_NOALIGN) != XFSMNT_NOALIGN) {
1874 if (dsunit) {
1875 args->sunit = dsunit;
1876 args->flags |= XFSMNT_RETERR;
1877 } else {
1878 args->sunit = vol_dsunit;
1879 }
1880 dswidth ? (args->swidth = dswidth) :
1881 (args->swidth = vol_dswidth);
1882 } else {
1883 args->sunit = args->swidth = 0;
1884 }
1885
1886 done:
1887 if (args->flags & XFSMNT_32BITINODES)
1888 vfsp->vfs_flag |= VFS_32BITINODES;
1889 if (args->flags2)
1890 args->flags |= XFSMNT_FLAGS2;
1891 return 0;
1892 }
1893
1894 STATIC int
1895 xfs_showargs(
1896 struct bhv_desc *bhv,
1897 struct seq_file *m)
1898 {
1899 static struct proc_xfs_info {
1900 int flag;
1901 char *str;
1902 } xfs_info[] = {
1903 /* the few simple ones we can get from the mount struct */
1904 { XFS_MOUNT_WSYNC, "," MNTOPT_WSYNC },
1905 { XFS_MOUNT_INO64, "," MNTOPT_INO64 },
1906 { XFS_MOUNT_NOALIGN, "," MNTOPT_NOALIGN },
1907 { XFS_MOUNT_SWALLOC, "," MNTOPT_SWALLOC },
1908 { XFS_MOUNT_NOUUID, "," MNTOPT_NOUUID },
1909 { XFS_MOUNT_NORECOVERY, "," MNTOPT_NORECOVERY },
1910 { XFS_MOUNT_OSYNCISOSYNC, "," MNTOPT_OSYNCISOSYNC },
1911 { 0, NULL }
1912 };
1913 struct proc_xfs_info *xfs_infop;
1914 struct xfs_mount *mp = XFS_BHVTOM(bhv);
1915 struct vfs *vfsp = XFS_MTOVFS(mp);
1916
1917 for (xfs_infop = xfs_info; xfs_infop->flag; xfs_infop++) {
1918 if (mp->m_flags & xfs_infop->flag)
1919 seq_puts(m, xfs_infop->str);
1920 }
1921
1922 if (mp->m_flags & XFS_MOUNT_IHASHSIZE)
1923 seq_printf(m, "," MNTOPT_IHASHSIZE "=%d", mp->m_ihsize);
1924
1925 if (mp->m_flags & XFS_MOUNT_DFLT_IOSIZE)
1926 seq_printf(m, "," MNTOPT_ALLOCSIZE "=%dk",
1927 (int)(1 << mp->m_writeio_log) >> 10);
1928
1929 if (mp->m_logbufs > 0)
1930 seq_printf(m, "," MNTOPT_LOGBUFS "=%d", mp->m_logbufs);
1931 if (mp->m_logbsize > 0)
1932 seq_printf(m, "," MNTOPT_LOGBSIZE "=%dk", mp->m_logbsize >> 10);
1933
1934 if (mp->m_logname)
1935 seq_printf(m, "," MNTOPT_LOGDEV "=%s", mp->m_logname);
1936 if (mp->m_rtname)
1937 seq_printf(m, "," MNTOPT_RTDEV "=%s", mp->m_rtname);
1938
1939 if (mp->m_dalign > 0)
1940 seq_printf(m, "," MNTOPT_SUNIT "=%d",
1941 (int)XFS_FSB_TO_BB(mp, mp->m_dalign));
1942 if (mp->m_swidth > 0)
1943 seq_printf(m, "," MNTOPT_SWIDTH "=%d",
1944 (int)XFS_FSB_TO_BB(mp, mp->m_swidth));
1945
1946 if (!(mp->m_flags & XFS_MOUNT_IDELETE))
1947 seq_printf(m, "," MNTOPT_IKEEP);
1948 if (!(mp->m_flags & XFS_MOUNT_COMPAT_IOSIZE))
1949 seq_printf(m, "," MNTOPT_LARGEIO);
1950 if (mp->m_flags & XFS_MOUNT_BARRIER)
1951 seq_printf(m, "," MNTOPT_BARRIER);
1952
1953 if (!(vfsp->vfs_flag & VFS_32BITINODES))
1954 seq_printf(m, "," MNTOPT_64BITINODE);
1955 if (vfsp->vfs_flag & VFS_GRPID)
1956 seq_printf(m, "," MNTOPT_GRPID);
1957
1958 return 0;
1959 }
1960
1961 STATIC void
1962 xfs_freeze(
1963 bhv_desc_t *bdp)
1964 {
1965 xfs_mount_t *mp = XFS_BHVTOM(bdp);
1966
1967 while (atomic_read(&mp->m_active_trans) > 0)
1968 delay(100);
1969
1970 /* Push the superblock and write an unmount record */
1971 xfs_log_unmount_write(mp);
1972 xfs_unmountfs_writesb(mp);
1973 xfs_fs_log_dummy(mp);
1974 }
1975
1976
1977 vfsops_t xfs_vfsops = {
1978 BHV_IDENTITY_INIT(VFS_BHV_XFS,VFS_POSITION_XFS),
1979 .vfs_parseargs = xfs_parseargs,
1980 .vfs_showargs = xfs_showargs,
1981 .vfs_mount = xfs_mount,
1982 .vfs_unmount = xfs_unmount,
1983 .vfs_mntupdate = xfs_mntupdate,
1984 .vfs_root = xfs_root,
1985 .vfs_statvfs = xfs_statvfs,
1986 .vfs_sync = xfs_sync,
1987 .vfs_vget = xfs_vget,
1988 .vfs_dmapiops = (vfs_dmapiops_t)fs_nosys,
1989 .vfs_quotactl = (vfs_quotactl_t)fs_nosys,
1990 .vfs_init_vnode = xfs_initialize_vnode,
1991 .vfs_force_shutdown = xfs_do_force_shutdown,
1992 .vfs_freeze = xfs_freeze,
1993 };
Stable & featurefull patchset based on Linus's git branch