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Merge master.kernel.org:/home/rmk/linux-2.6-arm
[linux-2.6.22.y-op.git] / fs / xfs / xfs_vfsops.c
blob7bdbd991ab1cdd63300cc1eb7897b469d1a11abf
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
57 STATIC int xfs_sync(bhv_desc_t *, int, cred_t *);
58
59 int
60 xfs_init(void)
61 {
62 extern kmem_zone_t *xfs_bmap_free_item_zone;
63 extern kmem_zone_t *xfs_btree_cur_zone;
64 extern kmem_zone_t *xfs_trans_zone;
65 extern kmem_zone_t *xfs_buf_item_zone;
66 extern kmem_zone_t *xfs_dabuf_zone;
67 #ifdef XFS_DABUF_DEBUG
68 extern lock_t xfs_dabuf_global_lock;
69 spinlock_init(&xfs_dabuf_global_lock, "xfsda");
70 #endif
71
72 /*
73 * Initialize all of the zone allocators we use.
74 */
75 xfs_bmap_free_item_zone = kmem_zone_init(sizeof(xfs_bmap_free_item_t),
76 "xfs_bmap_free_item");
77 xfs_btree_cur_zone = kmem_zone_init(sizeof(xfs_btree_cur_t),
78 "xfs_btree_cur");
79 xfs_inode_zone = kmem_zone_init(sizeof(xfs_inode_t), "xfs_inode");
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
85 /*
86 * The size of the zone allocated buf log item is the maximum
87 * size possible under XFS. This wastes a little bit of memory,
88 * but it is much faster.
89 */
90 xfs_buf_item_zone =
91 kmem_zone_init((sizeof(xfs_buf_log_item_t) +
92 (((XFS_MAX_BLOCKSIZE / XFS_BLI_CHUNK) /
93 NBWORD) * sizeof(int))),
94 "xfs_buf_item");
95 xfs_efd_zone = kmem_zone_init((sizeof(xfs_efd_log_item_t) +
96 ((XFS_EFD_MAX_FAST_EXTENTS - 1) * sizeof(xfs_extent_t))),
97 "xfs_efd_item");
98 xfs_efi_zone = kmem_zone_init((sizeof(xfs_efi_log_item_t) +
99 ((XFS_EFI_MAX_FAST_EXTENTS - 1) * sizeof(xfs_extent_t))),
100 "xfs_efi_item");
101 xfs_ifork_zone = kmem_zone_init(sizeof(xfs_ifork_t), "xfs_ifork");
102 xfs_ili_zone = kmem_zone_init(sizeof(xfs_inode_log_item_t), "xfs_ili");
103 xfs_chashlist_zone = kmem_zone_init(sizeof(xfs_chashlist_t),
104 "xfs_chashlist");
105 xfs_acl_zone_init(xfs_acl_zone, "xfs_acl");
106
107 /*
108 * Allocate global trace buffers.
109 */
110 #ifdef XFS_ALLOC_TRACE
111 xfs_alloc_trace_buf = ktrace_alloc(XFS_ALLOC_TRACE_SIZE, KM_SLEEP);
112 #endif
113 #ifdef XFS_BMAP_TRACE
114 xfs_bmap_trace_buf = ktrace_alloc(XFS_BMAP_TRACE_SIZE, KM_SLEEP);
115 #endif
116 #ifdef XFS_BMBT_TRACE
117 xfs_bmbt_trace_buf = ktrace_alloc(XFS_BMBT_TRACE_SIZE, KM_SLEEP);
118 #endif
119 #ifdef XFS_DIR_TRACE
120 xfs_dir_trace_buf = ktrace_alloc(XFS_DIR_TRACE_SIZE, KM_SLEEP);
121 #endif
122 #ifdef XFS_ATTR_TRACE
123 xfs_attr_trace_buf = ktrace_alloc(XFS_ATTR_TRACE_SIZE, KM_SLEEP);
124 #endif
125 #ifdef XFS_DIR2_TRACE
126 xfs_dir2_trace_buf = ktrace_alloc(XFS_DIR2_GTRACE_SIZE, KM_SLEEP);
127 #endif
128
129 xfs_dir_startup();
130
131 #if (defined(DEBUG) || defined(INDUCE_IO_ERROR))
132 xfs_error_test_init();
133 #endif /* DEBUG || INDUCE_IO_ERROR */
134
135 xfs_init_procfs();
136 xfs_sysctl_register();
137 return 0;
138 }
139
140 void
141 xfs_cleanup(void)
142 {
143 extern kmem_zone_t *xfs_bmap_free_item_zone;
144 extern kmem_zone_t *xfs_btree_cur_zone;
145 extern kmem_zone_t *xfs_inode_zone;
146 extern kmem_zone_t *xfs_trans_zone;
147 extern kmem_zone_t *xfs_da_state_zone;
148 extern kmem_zone_t *xfs_dabuf_zone;
149 extern kmem_zone_t *xfs_efd_zone;
150 extern kmem_zone_t *xfs_efi_zone;
151 extern kmem_zone_t *xfs_buf_item_zone;
152 extern kmem_zone_t *xfs_chashlist_zone;
153
154 xfs_cleanup_procfs();
155 xfs_sysctl_unregister();
156 xfs_refcache_destroy();
157 xfs_acl_zone_destroy(xfs_acl_zone);
158
159 #ifdef XFS_DIR2_TRACE
160 ktrace_free(xfs_dir2_trace_buf);
161 #endif
162 #ifdef XFS_ATTR_TRACE
163 ktrace_free(xfs_attr_trace_buf);
164 #endif
165 #ifdef XFS_DIR_TRACE
166 ktrace_free(xfs_dir_trace_buf);
167 #endif
168 #ifdef XFS_BMBT_TRACE
169 ktrace_free(xfs_bmbt_trace_buf);
170 #endif
171 #ifdef XFS_BMAP_TRACE
172 ktrace_free(xfs_bmap_trace_buf);
173 #endif
174 #ifdef XFS_ALLOC_TRACE
175 ktrace_free(xfs_alloc_trace_buf);
176 #endif
177
178 kmem_cache_destroy(xfs_bmap_free_item_zone);
179 kmem_cache_destroy(xfs_btree_cur_zone);
180 kmem_cache_destroy(xfs_inode_zone);
181 kmem_cache_destroy(xfs_trans_zone);
182 kmem_cache_destroy(xfs_da_state_zone);
183 kmem_cache_destroy(xfs_dabuf_zone);
184 kmem_cache_destroy(xfs_buf_item_zone);
185 kmem_cache_destroy(xfs_efd_zone);
186 kmem_cache_destroy(xfs_efi_zone);
187 kmem_cache_destroy(xfs_ifork_zone);
188 kmem_cache_destroy(xfs_ili_zone);
189 kmem_cache_destroy(xfs_chashlist_zone);
190 }
191
192 /*
193 * xfs_start_flags
194 *
195 * This function fills in xfs_mount_t fields based on mount args.
196 * Note: the superblock has _not_ yet been read in.
197 */
198 STATIC int
199 xfs_start_flags(
200 struct vfs *vfs,
201 struct xfs_mount_args *ap,
202 struct xfs_mount *mp)
203 {
204 /* Values are in BBs */
205 if ((ap->flags & XFSMNT_NOALIGN) != XFSMNT_NOALIGN) {
206 /*
207 * At this point the superblock has not been read
208 * in, therefore we do not know the block size.
209 * Before the mount call ends we will convert
210 * these to FSBs.
211 */
212 mp->m_dalign = ap->sunit;
213 mp->m_swidth = ap->swidth;
214 }
215
216 if (ap->logbufs != -1 &&
217 ap->logbufs != 0 &&
218 (ap->logbufs < XLOG_MIN_ICLOGS ||
219 ap->logbufs > XLOG_MAX_ICLOGS)) {
220 cmn_err(CE_WARN,
221 "XFS: invalid logbufs value: %d [not %d-%d]",
222 ap->logbufs, XLOG_MIN_ICLOGS, XLOG_MAX_ICLOGS);
223 return XFS_ERROR(EINVAL);
224 }
225 mp->m_logbufs = ap->logbufs;
226 if (ap->logbufsize != -1 &&
227 ap->logbufsize != 0 &&
228 ap->logbufsize != 16 * 1024 &&
229 ap->logbufsize != 32 * 1024 &&
230 ap->logbufsize != 64 * 1024 &&
231 ap->logbufsize != 128 * 1024 &&
232 ap->logbufsize != 256 * 1024) {
233 cmn_err(CE_WARN,
234 "XFS: invalid logbufsize: %d [not 16k,32k,64k,128k or 256k]",
235 ap->logbufsize);
236 return XFS_ERROR(EINVAL);
237 }
238 mp->m_ihsize = ap->ihashsize;
239 mp->m_logbsize = ap->logbufsize;
240 mp->m_fsname_len = strlen(ap->fsname) + 1;
241 mp->m_fsname = kmem_alloc(mp->m_fsname_len, KM_SLEEP);
242 strcpy(mp->m_fsname, ap->fsname);
243 if (ap->rtname[0]) {
244 mp->m_rtname = kmem_alloc(strlen(ap->rtname) + 1, KM_SLEEP);
245 strcpy(mp->m_rtname, ap->rtname);
246 }
247 if (ap->logname[0]) {
248 mp->m_logname = kmem_alloc(strlen(ap->logname) + 1, KM_SLEEP);
249 strcpy(mp->m_logname, ap->logname);
250 }
251
252 if (ap->flags & XFSMNT_WSYNC)
253 mp->m_flags |= XFS_MOUNT_WSYNC;
254 #if XFS_BIG_INUMS
255 if (ap->flags & XFSMNT_INO64) {
256 mp->m_flags |= XFS_MOUNT_INO64;
257 mp->m_inoadd = XFS_INO64_OFFSET;
258 }
259 #endif
260 if (ap->flags & XFSMNT_NOATIME)
261 mp->m_flags |= XFS_MOUNT_NOATIME;
262 if (ap->flags & XFSMNT_RETERR)
263 mp->m_flags |= XFS_MOUNT_RETERR;
264 if (ap->flags & XFSMNT_NOALIGN)
265 mp->m_flags |= XFS_MOUNT_NOALIGN;
266 if (ap->flags & XFSMNT_SWALLOC)
267 mp->m_flags |= XFS_MOUNT_SWALLOC;
268 if (ap->flags & XFSMNT_OSYNCISOSYNC)
269 mp->m_flags |= XFS_MOUNT_OSYNCISOSYNC;
270 if (ap->flags & XFSMNT_32BITINODES)
271 mp->m_flags |= XFS_MOUNT_32BITINODES;
272
273 if (ap->flags & XFSMNT_IOSIZE) {
274 if (ap->iosizelog > XFS_MAX_IO_LOG ||
275 ap->iosizelog < XFS_MIN_IO_LOG) {
276 cmn_err(CE_WARN,
277 "XFS: invalid log iosize: %d [not %d-%d]",
278 ap->iosizelog, XFS_MIN_IO_LOG,
279 XFS_MAX_IO_LOG);
280 return XFS_ERROR(EINVAL);
281 }
282
283 mp->m_flags |= XFS_MOUNT_DFLT_IOSIZE;
284 mp->m_readio_log = mp->m_writeio_log = ap->iosizelog;
285 }
286
287 if (ap->flags & XFSMNT_IHASHSIZE)
288 mp->m_flags |= XFS_MOUNT_IHASHSIZE;
289 if (ap->flags & XFSMNT_IDELETE)
290 mp->m_flags |= XFS_MOUNT_IDELETE;
291 if (ap->flags & XFSMNT_DIRSYNC)
292 mp->m_flags |= XFS_MOUNT_DIRSYNC;
293 if (ap->flags & XFSMNT_COMPAT_ATTR)
294 mp->m_flags |= XFS_MOUNT_COMPAT_ATTR;
295
296 if (ap->flags2 & XFSMNT2_COMPAT_IOSIZE)
297 mp->m_flags |= XFS_MOUNT_COMPAT_IOSIZE;
298
299 /*
300 * no recovery flag requires a read-only mount
301 */
302 if (ap->flags & XFSMNT_NORECOVERY) {
303 if (!(vfs->vfs_flag & VFS_RDONLY)) {
304 cmn_err(CE_WARN,
305 "XFS: tried to mount a FS read-write without recovery!");
306 return XFS_ERROR(EINVAL);
307 }
308 mp->m_flags |= XFS_MOUNT_NORECOVERY;
309 }
310
311 if (ap->flags & XFSMNT_NOUUID)
312 mp->m_flags |= XFS_MOUNT_NOUUID;
313 if (ap->flags & XFSMNT_BARRIER)
314 mp->m_flags |= XFS_MOUNT_BARRIER;
315
316 return 0;
317 }
318
319 /*
320 * This function fills in xfs_mount_t fields based on mount args.
321 * Note: the superblock _has_ now been read in.
322 */
323 STATIC int
324 xfs_finish_flags(
325 struct vfs *vfs,
326 struct xfs_mount_args *ap,
327 struct xfs_mount *mp)
328 {
329 int ronly = (vfs->vfs_flag & VFS_RDONLY);
330
331 /* Fail a mount where the logbuf is smaller then the log stripe */
332 if (XFS_SB_VERSION_HASLOGV2(&mp->m_sb)) {
333 if ((ap->logbufsize == -1) &&
334 (mp->m_sb.sb_logsunit > XLOG_BIG_RECORD_BSIZE)) {
335 mp->m_logbsize = mp->m_sb.sb_logsunit;
336 } else if (ap->logbufsize < mp->m_sb.sb_logsunit) {
337 cmn_err(CE_WARN,
338 "XFS: logbuf size must be greater than or equal to log stripe size");
339 return XFS_ERROR(EINVAL);
340 }
341 } else {
342 /* Fail a mount if the logbuf is larger than 32K */
343 if (ap->logbufsize > XLOG_BIG_RECORD_BSIZE) {
344 cmn_err(CE_WARN,
345 "XFS: logbuf size for version 1 logs must be 16K or 32K");
346 return XFS_ERROR(EINVAL);
347 }
348 }
349
350 /*
351 * prohibit r/w mounts of read-only filesystems
352 */
353 if ((mp->m_sb.sb_flags & XFS_SBF_READONLY) && !ronly) {
354 cmn_err(CE_WARN,
355 "XFS: cannot mount a read-only filesystem as read-write");
356 return XFS_ERROR(EROFS);
357 }
358
359 /*
360 * check for shared mount.
361 */
362 if (ap->flags & XFSMNT_SHARED) {
363 if (!XFS_SB_VERSION_HASSHARED(&mp->m_sb))
364 return XFS_ERROR(EINVAL);
365
366 /*
367 * For IRIX 6.5, shared mounts must have the shared
368 * version bit set, have the persistent readonly
369 * field set, must be version 0 and can only be mounted
370 * read-only.
371 */
372 if (!ronly || !(mp->m_sb.sb_flags & XFS_SBF_READONLY) ||
373 (mp->m_sb.sb_shared_vn != 0))
374 return XFS_ERROR(EINVAL);
375
376 mp->m_flags |= XFS_MOUNT_SHARED;
377
378 /*
379 * Shared XFS V0 can't deal with DMI. Return EINVAL.
380 */
381 if (mp->m_sb.sb_shared_vn == 0 && (ap->flags & XFSMNT_DMAPI))
382 return XFS_ERROR(EINVAL);
383 }
384
385 if (XFS_SB_VERSION_HASATTR2(&mp->m_sb)) {
386 mp->m_flags &= ~XFS_MOUNT_COMPAT_ATTR;
387 }
388
389 return 0;
390 }
391
392 /*
393 * xfs_mount
394 *
395 * The file system configurations are:
396 * (1) device (partition) with data and internal log
397 * (2) logical volume with data and log subvolumes.
398 * (3) logical volume with data, log, and realtime subvolumes.
399 *
400 * We only have to handle opening the log and realtime volumes here if
401 * they are present. The data subvolume has already been opened by
402 * get_sb_bdev() and is stored in vfsp->vfs_super->s_bdev.
403 */
404 STATIC int
405 xfs_mount(
406 struct bhv_desc *bhvp,
407 struct xfs_mount_args *args,
408 cred_t *credp)
409 {
410 struct vfs *vfsp = bhvtovfs(bhvp);
411 struct bhv_desc *p;
412 struct xfs_mount *mp = XFS_BHVTOM(bhvp);
413 struct block_device *ddev, *logdev, *rtdev;
414 int flags = 0, error;
415
416 ddev = vfsp->vfs_super->s_bdev;
417 logdev = rtdev = NULL;
418
419 /*
420 * Setup xfs_mount function vectors from available behaviors
421 */
422 p = vfs_bhv_lookup(vfsp, VFS_POSITION_DM);
423 mp->m_dm_ops = p ? *(xfs_dmops_t *) vfs_bhv_custom(p) : xfs_dmcore_stub;
424 p = vfs_bhv_lookup(vfsp, VFS_POSITION_QM);
425 mp->m_qm_ops = p ? *(xfs_qmops_t *) vfs_bhv_custom(p) : xfs_qmcore_stub;
426 p = vfs_bhv_lookup(vfsp, VFS_POSITION_IO);
427 mp->m_io_ops = p ? *(xfs_ioops_t *) vfs_bhv_custom(p) : xfs_iocore_xfs;
428
429 /*
430 * Open real time and log devices - order is important.
431 */
432 if (args->logname[0]) {
433 error = xfs_blkdev_get(mp, args->logname, &logdev);
434 if (error)
435 return error;
436 }
437 if (args->rtname[0]) {
438 error = xfs_blkdev_get(mp, args->rtname, &rtdev);
439 if (error) {
440 xfs_blkdev_put(logdev);
441 return error;
442 }
443
444 if (rtdev == ddev || rtdev == logdev) {
445 cmn_err(CE_WARN,
446 "XFS: Cannot mount filesystem with identical rtdev and ddev/logdev.");
447 xfs_blkdev_put(logdev);
448 xfs_blkdev_put(rtdev);
449 return EINVAL;
450 }
451 }
452
453 /*
454 * Setup xfs_mount buffer target pointers
455 */
456 error = ENOMEM;
457 mp->m_ddev_targp = xfs_alloc_buftarg(ddev, 0);
458 if (!mp->m_ddev_targp) {
459 xfs_blkdev_put(logdev);
460 xfs_blkdev_put(rtdev);
461 return error;
462 }
463 if (rtdev) {
464 mp->m_rtdev_targp = xfs_alloc_buftarg(rtdev, 1);
465 if (!mp->m_rtdev_targp)
466 goto error0;
467 }
468 mp->m_logdev_targp = (logdev && logdev != ddev) ?
469 xfs_alloc_buftarg(logdev, 1) : mp->m_ddev_targp;
470 if (!mp->m_logdev_targp)
471 goto error0;
472
473 /*
474 * Setup flags based on mount(2) options and then the superblock
475 */
476 error = xfs_start_flags(vfsp, args, mp);
477 if (error)
478 goto error1;
479 error = xfs_readsb(mp);
480 if (error)
481 goto error1;
482 error = xfs_finish_flags(vfsp, args, mp);
483 if (error)
484 goto error2;
485
486 /*
487 * Setup xfs_mount buffer target pointers based on superblock
488 */
489 error = xfs_setsize_buftarg(mp->m_ddev_targp, mp->m_sb.sb_blocksize,
490 mp->m_sb.sb_sectsize);
491 if (!error && logdev && logdev != ddev) {
492 unsigned int log_sector_size = BBSIZE;
493
494 if (XFS_SB_VERSION_HASSECTOR(&mp->m_sb))
495 log_sector_size = mp->m_sb.sb_logsectsize;
496 error = xfs_setsize_buftarg(mp->m_logdev_targp,
497 mp->m_sb.sb_blocksize,
498 log_sector_size);
499 }
500 if (!error && rtdev)
501 error = xfs_setsize_buftarg(mp->m_rtdev_targp,
502 mp->m_sb.sb_blocksize,
503 mp->m_sb.sb_sectsize);
504 if (error)
505 goto error2;
506
507 error = XFS_IOINIT(vfsp, args, flags);
508 if (error)
509 goto error2;
510
511 if ((args->flags & XFSMNT_BARRIER) &&
512 !(XFS_MTOVFS(mp)->vfs_flag & VFS_RDONLY))
513 xfs_mountfs_check_barriers(mp);
514 return 0;
515
516 error2:
517 if (mp->m_sb_bp)
518 xfs_freesb(mp);
519 error1:
520 xfs_binval(mp->m_ddev_targp);
521 if (logdev && logdev != ddev)
522 xfs_binval(mp->m_logdev_targp);
523 if (rtdev)
524 xfs_binval(mp->m_rtdev_targp);
525 error0:
526 xfs_unmountfs_close(mp, credp);
527 return error;
528 }
529
530 STATIC int
531 xfs_unmount(
532 bhv_desc_t *bdp,
533 int flags,
534 cred_t *credp)
535 {
536 struct vfs *vfsp = bhvtovfs(bdp);
537 xfs_mount_t *mp = XFS_BHVTOM(bdp);
538 xfs_inode_t *rip;
539 vnode_t *rvp;
540 int unmount_event_wanted = 0;
541 int unmount_event_flags = 0;
542 int xfs_unmountfs_needed = 0;
543 int error;
544
545 rip = mp->m_rootip;
546 rvp = XFS_ITOV(rip);
547
548 if (vfsp->vfs_flag & VFS_DMI) {
549 error = XFS_SEND_PREUNMOUNT(mp, vfsp,
550 rvp, DM_RIGHT_NULL, rvp, DM_RIGHT_NULL,
551 NULL, NULL, 0, 0,
552 (mp->m_dmevmask & (1<<DM_EVENT_PREUNMOUNT))?
553 0:DM_FLAGS_UNWANTED);
554 if (error)
555 return XFS_ERROR(error);
556 unmount_event_wanted = 1;
557 unmount_event_flags = (mp->m_dmevmask & (1<<DM_EVENT_UNMOUNT))?
558 0 : DM_FLAGS_UNWANTED;
559 }
560
561 /*
562 * First blow any referenced inode from this file system
563 * out of the reference cache, and delete the timer.
564 */
565 xfs_refcache_purge_mp(mp);
566
567 XFS_bflush(mp->m_ddev_targp);
568 error = xfs_unmount_flush(mp, 0);
569 if (error)
570 goto out;
571
572 ASSERT(vn_count(rvp) == 1);
573
574 /*
575 * Drop the reference count
576 */
577 VN_RELE(rvp);
578
579 /*
580 * If we're forcing a shutdown, typically because of a media error,
581 * we want to make sure we invalidate dirty pages that belong to
582 * referenced vnodes as well.
583 */
584 if (XFS_FORCED_SHUTDOWN(mp)) {
585 error = xfs_sync(&mp->m_bhv,
586 (SYNC_WAIT | SYNC_CLOSE), credp);
587 ASSERT(error != EFSCORRUPTED);
588 }
589 xfs_unmountfs_needed = 1;
590
591 out:
592 /* Send DMAPI event, if required.
593 * Then do xfs_unmountfs() if needed.
594 * Then return error (or zero).
595 */
596 if (unmount_event_wanted) {
597 /* Note: mp structure must still exist for
598 * XFS_SEND_UNMOUNT() call.
599 */
600 XFS_SEND_UNMOUNT(mp, vfsp, error == 0 ? rvp : NULL,
601 DM_RIGHT_NULL, 0, error, unmount_event_flags);
602 }
603 if (xfs_unmountfs_needed) {
604 /*
605 * Call common unmount function to flush to disk
606 * and free the super block buffer & mount structures.
607 */
608 xfs_unmountfs(mp, credp);
609 }
610
611 return XFS_ERROR(error);
612 }
613
614 STATIC int
615 xfs_quiesce_fs(
616 xfs_mount_t *mp)
617 {
618 int count = 0, pincount;
619
620 xfs_refcache_purge_mp(mp);
621 xfs_flush_buftarg(mp->m_ddev_targp, 0);
622 xfs_finish_reclaim_all(mp, 0);
623
624 /* This loop must run at least twice.
625 * The first instance of the loop will flush
626 * most meta data but that will generate more
627 * meta data (typically directory updates).
628 * Which then must be flushed and logged before
629 * we can write the unmount record.
630 */
631 do {
632 xfs_syncsub(mp, SYNC_REMOUNT|SYNC_ATTR|SYNC_WAIT, 0, NULL);
633 pincount = xfs_flush_buftarg(mp->m_ddev_targp, 1);
634 if (!pincount) {
635 delay(50);
636 count++;
637 }
638 } while (count < 2);
639
640 return 0;
641 }
642
643 STATIC int
644 xfs_mntupdate(
645 bhv_desc_t *bdp,
646 int *flags,
647 struct xfs_mount_args *args)
648 {
649 struct vfs *vfsp = bhvtovfs(bdp);
650 xfs_mount_t *mp = XFS_BHVTOM(bdp);
651 int error;
652
653 if (args->flags & XFSMNT_NOATIME)
654 mp->m_flags |= XFS_MOUNT_NOATIME;
655 else
656 mp->m_flags &= ~XFS_MOUNT_NOATIME;
657
658 if ((vfsp->vfs_flag & VFS_RDONLY) &&
659 !(*flags & MS_RDONLY)) {
660 vfsp->vfs_flag &= ~VFS_RDONLY;
661
662 if (args->flags & XFSMNT_BARRIER)
663 xfs_mountfs_check_barriers(mp);
664 }
665
666 if (!(vfsp->vfs_flag & VFS_RDONLY) &&
667 (*flags & MS_RDONLY)) {
668 VFS_SYNC(vfsp, SYNC_FSDATA|SYNC_BDFLUSH|SYNC_ATTR, NULL, error);
669
670 xfs_quiesce_fs(mp);
671
672 /* Ok now write out an unmount record */
673 xfs_log_unmount_write(mp);
674 xfs_unmountfs_writesb(mp);
675 vfsp->vfs_flag |= VFS_RDONLY;
676 }
677
678 return 0;
679 }
680
681 /*
682 * xfs_unmount_flush implements a set of flush operation on special
683 * inodes, which are needed as a separate set of operations so that
684 * they can be called as part of relocation process.
685 */
686 int
687 xfs_unmount_flush(
688 xfs_mount_t *mp, /* Mount structure we are getting
689 rid of. */
690 int relocation) /* Called from vfs relocation. */
691 {
692 xfs_inode_t *rip = mp->m_rootip;
693 xfs_inode_t *rbmip;
694 xfs_inode_t *rsumip = NULL;
695 vnode_t *rvp = XFS_ITOV(rip);
696 int error;
697
698 xfs_ilock(rip, XFS_ILOCK_EXCL);
699 xfs_iflock(rip);
700
701 /*
702 * Flush out the real time inodes.
703 */
704 if ((rbmip = mp->m_rbmip) != NULL) {
705 xfs_ilock(rbmip, XFS_ILOCK_EXCL);
706 xfs_iflock(rbmip);
707 error = xfs_iflush(rbmip, XFS_IFLUSH_SYNC);
708 xfs_iunlock(rbmip, XFS_ILOCK_EXCL);
709
710 if (error == EFSCORRUPTED)
711 goto fscorrupt_out;
712
713 ASSERT(vn_count(XFS_ITOV(rbmip)) == 1);
714
715 rsumip = mp->m_rsumip;
716 xfs_ilock(rsumip, XFS_ILOCK_EXCL);
717 xfs_iflock(rsumip);
718 error = xfs_iflush(rsumip, XFS_IFLUSH_SYNC);
719 xfs_iunlock(rsumip, XFS_ILOCK_EXCL);
720
721 if (error == EFSCORRUPTED)
722 goto fscorrupt_out;
723
724 ASSERT(vn_count(XFS_ITOV(rsumip)) == 1);
725 }
726
727 /*
728 * Synchronously flush root inode to disk
729 */
730 error = xfs_iflush(rip, XFS_IFLUSH_SYNC);
731 if (error == EFSCORRUPTED)
732 goto fscorrupt_out2;
733
734 if (vn_count(rvp) != 1 && !relocation) {
735 xfs_iunlock(rip, XFS_ILOCK_EXCL);
736 return XFS_ERROR(EBUSY);
737 }
738
739 /*
740 * Release dquot that rootinode, rbmino and rsumino might be holding,
741 * flush and purge the quota inodes.
742 */
743 error = XFS_QM_UNMOUNT(mp);
744 if (error == EFSCORRUPTED)
745 goto fscorrupt_out2;
746
747 if (rbmip) {
748 VN_RELE(XFS_ITOV(rbmip));
749 VN_RELE(XFS_ITOV(rsumip));
750 }
751
752 xfs_iunlock(rip, XFS_ILOCK_EXCL);
753 return 0;
754
755 fscorrupt_out:
756 xfs_ifunlock(rip);
757
758 fscorrupt_out2:
759 xfs_iunlock(rip, XFS_ILOCK_EXCL);
760
761 return XFS_ERROR(EFSCORRUPTED);
762 }
763
764 /*
765 * xfs_root extracts the root vnode from a vfs.
766 *
767 * vfsp -- the vfs struct for the desired file system
768 * vpp -- address of the caller's vnode pointer which should be
769 * set to the desired fs root vnode
770 */
771 STATIC int
772 xfs_root(
773 bhv_desc_t *bdp,
774 vnode_t **vpp)
775 {
776 vnode_t *vp;
777
778 vp = XFS_ITOV((XFS_BHVTOM(bdp))->m_rootip);
779 VN_HOLD(vp);
780 *vpp = vp;
781 return 0;
782 }
783
784 /*
785 * xfs_statvfs
786 *
787 * Fill in the statvfs structure for the given file system. We use
788 * the superblock lock in the mount structure to ensure a consistent
789 * snapshot of the counters returned.
790 */
791 STATIC int
792 xfs_statvfs(
793 bhv_desc_t *bdp,
794 xfs_statfs_t *statp,
795 vnode_t *vp)
796 {
797 __uint64_t fakeinos;
798 xfs_extlen_t lsize;
799 xfs_mount_t *mp;
800 xfs_sb_t *sbp;
801 unsigned long s;
802
803 mp = XFS_BHVTOM(bdp);
804 sbp = &(mp->m_sb);
805
806 statp->f_type = XFS_SB_MAGIC;
807
808 s = XFS_SB_LOCK(mp);
809 statp->f_bsize = sbp->sb_blocksize;
810 lsize = sbp->sb_logstart ? sbp->sb_logblocks : 0;
811 statp->f_blocks = sbp->sb_dblocks - lsize;
812 statp->f_bfree = statp->f_bavail = sbp->sb_fdblocks;
813 fakeinos = statp->f_bfree << sbp->sb_inopblog;
814 #if XFS_BIG_INUMS
815 fakeinos += mp->m_inoadd;
816 #endif
817 statp->f_files =
818 MIN(sbp->sb_icount + fakeinos, (__uint64_t)XFS_MAXINUMBER);
819 if (mp->m_maxicount)
820 #if XFS_BIG_INUMS
821 if (!mp->m_inoadd)
822 #endif
823 statp->f_files = min_t(typeof(statp->f_files),
824 statp->f_files,
825 mp->m_maxicount);
826 statp->f_ffree = statp->f_files - (sbp->sb_icount - sbp->sb_ifree);
827 XFS_SB_UNLOCK(mp, s);
828
829 xfs_statvfs_fsid(statp, mp);
830 statp->f_namelen = MAXNAMELEN - 1;
831
832 return 0;
833 }
834
835
836 /*
837 * xfs_sync flushes any pending I/O to file system vfsp.
838 *
839 * This routine is called by vfs_sync() to make sure that things make it
840 * out to disk eventually, on sync() system calls to flush out everything,
841 * and when the file system is unmounted. For the vfs_sync() case, all
842 * we really need to do is sync out the log to make all of our meta-data
843 * updates permanent (except for timestamps). For calls from pflushd(),
844 * dirty pages are kept moving by calling pdflush() on the inodes
845 * containing them. We also flush the inodes that we can lock without
846 * sleeping and the superblock if we can lock it without sleeping from
847 * vfs_sync() so that items at the tail of the log are always moving out.
848 *
849 * Flags:
850 * SYNC_BDFLUSH - We're being called from vfs_sync() so we don't want
851 * to sleep if we can help it. All we really need
852 * to do is ensure that the log is synced at least
853 * periodically. We also push the inodes and
854 * superblock if we can lock them without sleeping
855 * and they are not pinned.
856 * SYNC_ATTR - We need to flush the inodes. If SYNC_BDFLUSH is not
857 * set, then we really want to lock each inode and flush
858 * it.
859 * SYNC_WAIT - All the flushes that take place in this call should
860 * be synchronous.
861 * SYNC_DELWRI - This tells us to push dirty pages associated with
862 * inodes. SYNC_WAIT and SYNC_BDFLUSH are used to
863 * determine if they should be flushed sync, async, or
864 * delwri.
865 * SYNC_CLOSE - This flag is passed when the system is being
866 * unmounted. We should sync and invalidate everthing.
867 * SYNC_FSDATA - This indicates that the caller would like to make
868 * sure the superblock is safe on disk. We can ensure
869 * this by simply makeing sure the log gets flushed
870 * if SYNC_BDFLUSH is set, and by actually writing it
871 * out otherwise.
872 *
873 */
874 /*ARGSUSED*/
875 STATIC int
876 xfs_sync(
877 bhv_desc_t *bdp,
878 int flags,
879 cred_t *credp)
880 {
881 xfs_mount_t *mp = XFS_BHVTOM(bdp);
882
883 if (unlikely(flags == SYNC_QUIESCE))
884 return xfs_quiesce_fs(mp);
885 else
886 return xfs_syncsub(mp, flags, 0, NULL);
887 }
888
889 /*
890 * xfs sync routine for internal use
891 *
892 * This routine supports all of the flags defined for the generic VFS_SYNC
893 * interface as explained above under xfs_sync. In the interests of not
894 * changing interfaces within the 6.5 family, additional internallly-
895 * required functions are specified within a separate xflags parameter,
896 * only available by calling this routine.
897 *
898 */
899 int
900 xfs_sync_inodes(
901 xfs_mount_t *mp,
902 int flags,
903 int xflags,
904 int *bypassed)
905 {
906 xfs_inode_t *ip = NULL;
907 xfs_inode_t *ip_next;
908 xfs_buf_t *bp;
909 vnode_t *vp = NULL;
910 int error;
911 int last_error;
912 uint64_t fflag;
913 uint lock_flags;
914 uint base_lock_flags;
915 boolean_t mount_locked;
916 boolean_t vnode_refed;
917 int preempt;
918 xfs_dinode_t *dip;
919 xfs_iptr_t *ipointer;
920 #ifdef DEBUG
921 boolean_t ipointer_in = B_FALSE;
922
923 #define IPOINTER_SET ipointer_in = B_TRUE
924 #define IPOINTER_CLR ipointer_in = B_FALSE
925 #else
926 #define IPOINTER_SET
927 #define IPOINTER_CLR
928 #endif
929
930
931 /* Insert a marker record into the inode list after inode ip. The list
932 * must be locked when this is called. After the call the list will no
933 * longer be locked.
934 */
935 #define IPOINTER_INSERT(ip, mp) { \
936 ASSERT(ipointer_in == B_FALSE); \
937 ipointer->ip_mnext = ip->i_mnext; \
938 ipointer->ip_mprev = ip; \
939 ip->i_mnext = (xfs_inode_t *)ipointer; \
940 ipointer->ip_mnext->i_mprev = (xfs_inode_t *)ipointer; \
941 preempt = 0; \
942 XFS_MOUNT_IUNLOCK(mp); \
943 mount_locked = B_FALSE; \
944 IPOINTER_SET; \
945 }
946
947 /* Remove the marker from the inode list. If the marker was the only item
948 * in the list then there are no remaining inodes and we should zero out
949 * the whole list. If we are the current head of the list then move the head
950 * past us.
951 */
952 #define IPOINTER_REMOVE(ip, mp) { \
953 ASSERT(ipointer_in == B_TRUE); \
954 if (ipointer->ip_mnext != (xfs_inode_t *)ipointer) { \
955 ip = ipointer->ip_mnext; \
956 ip->i_mprev = ipointer->ip_mprev; \
957 ipointer->ip_mprev->i_mnext = ip; \
958 if (mp->m_inodes == (xfs_inode_t *)ipointer) { \
959 mp->m_inodes = ip; \
960 } \
961 } else { \
962 ASSERT(mp->m_inodes == (xfs_inode_t *)ipointer); \
963 mp->m_inodes = NULL; \
964 ip = NULL; \
965 } \
966 IPOINTER_CLR; \
967 }
968
969 #define XFS_PREEMPT_MASK 0x7f
970
971 if (bypassed)
972 *bypassed = 0;
973 if (XFS_MTOVFS(mp)->vfs_flag & VFS_RDONLY)
974 return 0;
975 error = 0;
976 last_error = 0;
977 preempt = 0;
978
979 /* Allocate a reference marker */
980 ipointer = (xfs_iptr_t *)kmem_zalloc(sizeof(xfs_iptr_t), KM_SLEEP);
981
982 fflag = XFS_B_ASYNC; /* default is don't wait */
983 if (flags & (SYNC_BDFLUSH | SYNC_DELWRI))
984 fflag = XFS_B_DELWRI;
985 if (flags & SYNC_WAIT)
986 fflag = 0; /* synchronous overrides all */
987
988 base_lock_flags = XFS_ILOCK_SHARED;
989 if (flags & (SYNC_DELWRI | SYNC_CLOSE)) {
990 /*
991 * We need the I/O lock if we're going to call any of
992 * the flush/inval routines.
993 */
994 base_lock_flags |= XFS_IOLOCK_SHARED;
995 }
996
997 XFS_MOUNT_ILOCK(mp);
998
999 ip = mp->m_inodes;
1000
1001 mount_locked = B_TRUE;
1002 vnode_refed = B_FALSE;
1003
1004 IPOINTER_CLR;
1005
1006 do {
1007 ASSERT(ipointer_in == B_FALSE);
1008 ASSERT(vnode_refed == B_FALSE);
1009
1010 lock_flags = base_lock_flags;
1011
1012 /*
1013 * There were no inodes in the list, just break out
1014 * of the loop.
1015 */
1016 if (ip == NULL) {
1017 break;
1018 }
1019
1020 /*
1021 * We found another sync thread marker - skip it
1022 */
1023 if (ip->i_mount == NULL) {
1024 ip = ip->i_mnext;
1025 continue;
1026 }
1027
1028 vp = XFS_ITOV_NULL(ip);
1029
1030 /*
1031 * If the vnode is gone then this is being torn down,
1032 * call reclaim if it is flushed, else let regular flush
1033 * code deal with it later in the loop.
1034 */
1035
1036 if (vp == NULL) {
1037 /* Skip ones already in reclaim */
1038 if (ip->i_flags & XFS_IRECLAIM) {
1039 ip = ip->i_mnext;
1040 continue;
1041 }
1042 if (xfs_ilock_nowait(ip, XFS_ILOCK_EXCL) == 0) {
1043 ip = ip->i_mnext;
1044 } else if ((xfs_ipincount(ip) == 0) &&
1045 xfs_iflock_nowait(ip)) {
1046 IPOINTER_INSERT(ip, mp);
1047
1048 xfs_finish_reclaim(ip, 1,
1049 XFS_IFLUSH_DELWRI_ELSE_ASYNC);
1050
1051 XFS_MOUNT_ILOCK(mp);
1052 mount_locked = B_TRUE;
1053 IPOINTER_REMOVE(ip, mp);
1054 } else {
1055 xfs_iunlock(ip, XFS_ILOCK_EXCL);
1056 ip = ip->i_mnext;
1057 }
1058 continue;
1059 }
1060
1061 if (VN_BAD(vp)) {
1062 ip = ip->i_mnext;
1063 continue;
1064 }
1065
1066 if (XFS_FORCED_SHUTDOWN(mp) && !(flags & SYNC_CLOSE)) {
1067 XFS_MOUNT_IUNLOCK(mp);
1068 kmem_free(ipointer, sizeof(xfs_iptr_t));
1069 return 0;
1070 }
1071
1072 /*
1073 * If this is just vfs_sync() or pflushd() calling
1074 * then we can skip inodes for which it looks like
1075 * there is nothing to do. Since we don't have the
1076 * inode locked this is racey, but these are periodic
1077 * calls so it doesn't matter. For the others we want
1078 * to know for sure, so we at least try to lock them.
1079 */
1080 if (flags & SYNC_BDFLUSH) {
1081 if (((ip->i_itemp == NULL) ||
1082 !(ip->i_itemp->ili_format.ilf_fields &
1083 XFS_ILOG_ALL)) &&
1084 (ip->i_update_core == 0)) {
1085 ip = ip->i_mnext;
1086 continue;
1087 }
1088 }
1089
1090 /*
1091 * Try to lock without sleeping. We're out of order with
1092 * the inode list lock here, so if we fail we need to drop
1093 * the mount lock and try again. If we're called from
1094 * bdflush() here, then don't bother.
1095 *
1096 * The inode lock here actually coordinates with the
1097 * almost spurious inode lock in xfs_ireclaim() to prevent
1098 * the vnode we handle here without a reference from
1099 * being freed while we reference it. If we lock the inode
1100 * while it's on the mount list here, then the spurious inode
1101 * lock in xfs_ireclaim() after the inode is pulled from
1102 * the mount list will sleep until we release it here.
1103 * This keeps the vnode from being freed while we reference
1104 * it.
1105 */
1106 if (xfs_ilock_nowait(ip, lock_flags) == 0) {
1107 if ((flags & SYNC_BDFLUSH) || (vp == NULL)) {
1108 ip = ip->i_mnext;
1109 continue;
1110 }
1111
1112 vp = vn_grab(vp);
1113 if (vp == NULL) {
1114 ip = ip->i_mnext;
1115 continue;
1116 }
1117
1118 IPOINTER_INSERT(ip, mp);
1119 xfs_ilock(ip, lock_flags);
1120
1121 ASSERT(vp == XFS_ITOV(ip));
1122 ASSERT(ip->i_mount == mp);
1123
1124 vnode_refed = B_TRUE;
1125 }
1126
1127 /* From here on in the loop we may have a marker record
1128 * in the inode list.
1129 */
1130
1131 if ((flags & SYNC_CLOSE) && (vp != NULL)) {
1132 /*
1133 * This is the shutdown case. We just need to
1134 * flush and invalidate all the pages associated
1135 * with the inode. Drop the inode lock since
1136 * we can't hold it across calls to the buffer
1137 * cache.
1138 *
1139 * We don't set the VREMAPPING bit in the vnode
1140 * here, because we don't hold the vnode lock
1141 * exclusively. It doesn't really matter, though,
1142 * because we only come here when we're shutting
1143 * down anyway.
1144 */
1145 xfs_iunlock(ip, XFS_ILOCK_SHARED);
1146
1147 if (XFS_FORCED_SHUTDOWN(mp)) {
1148 VOP_TOSS_PAGES(vp, 0, -1, FI_REMAPF);
1149 } else {
1150 VOP_FLUSHINVAL_PAGES(vp, 0, -1, FI_REMAPF);
1151 }
1152
1153 xfs_ilock(ip, XFS_ILOCK_SHARED);
1154
1155 } else if ((flags & SYNC_DELWRI) && (vp != NULL)) {
1156 if (VN_DIRTY(vp)) {
1157 /* We need to have dropped the lock here,
1158 * so insert a marker if we have not already
1159 * done so.
1160 */
1161 if (mount_locked) {
1162 IPOINTER_INSERT(ip, mp);
1163 }
1164
1165 /*
1166 * Drop the inode lock since we can't hold it
1167 * across calls to the buffer cache.
1168 */
1169 xfs_iunlock(ip, XFS_ILOCK_SHARED);
1170 VOP_FLUSH_PAGES(vp, (xfs_off_t)0, -1,
1171 fflag, FI_NONE, error);
1172 xfs_ilock(ip, XFS_ILOCK_SHARED);
1173 }
1174
1175 }
1176
1177 if (flags & SYNC_BDFLUSH) {
1178 if ((flags & SYNC_ATTR) &&
1179 ((ip->i_update_core) ||
1180 ((ip->i_itemp != NULL) &&
1181 (ip->i_itemp->ili_format.ilf_fields != 0)))) {
1182
1183 /* Insert marker and drop lock if not already
1184 * done.
1185 */
1186 if (mount_locked) {
1187 IPOINTER_INSERT(ip, mp);
1188 }
1189
1190 /*
1191 * We don't want the periodic flushing of the
1192 * inodes by vfs_sync() to interfere with
1193 * I/O to the file, especially read I/O
1194 * where it is only the access time stamp
1195 * that is being flushed out. To prevent
1196 * long periods where we have both inode
1197 * locks held shared here while reading the
1198 * inode's buffer in from disk, we drop the
1199 * inode lock while reading in the inode
1200 * buffer. We have to release the buffer
1201 * and reacquire the inode lock so that they
1202 * are acquired in the proper order (inode
1203 * locks first). The buffer will go at the
1204 * end of the lru chain, though, so we can
1205 * expect it to still be there when we go
1206 * for it again in xfs_iflush().
1207 */
1208 if ((xfs_ipincount(ip) == 0) &&
1209 xfs_iflock_nowait(ip)) {
1210
1211 xfs_ifunlock(ip);
1212 xfs_iunlock(ip, XFS_ILOCK_SHARED);
1213
1214 error = xfs_itobp(mp, NULL, ip,
1215 &dip, &bp, 0);
1216 if (!error) {
1217 xfs_buf_relse(bp);
1218 } else {
1219 /* Bailing out, remove the
1220 * marker and free it.
1221 */
1222 XFS_MOUNT_ILOCK(mp);
1223
1224 IPOINTER_REMOVE(ip, mp);
1225
1226 XFS_MOUNT_IUNLOCK(mp);
1227
1228 ASSERT(!(lock_flags &
1229 XFS_IOLOCK_SHARED));
1230
1231 kmem_free(ipointer,
1232 sizeof(xfs_iptr_t));
1233 return (0);
1234 }
1235
1236 /*
1237 * Since we dropped the inode lock,
1238 * the inode may have been reclaimed.
1239 * Therefore, we reacquire the mount
1240 * lock and check to see if we were the
1241 * inode reclaimed. If this happened
1242 * then the ipointer marker will no
1243 * longer point back at us. In this
1244 * case, move ip along to the inode
1245 * after the marker, remove the marker
1246 * and continue.
1247 */
1248 XFS_MOUNT_ILOCK(mp);
1249 mount_locked = B_TRUE;
1250
1251 if (ip != ipointer->ip_mprev) {
1252 IPOINTER_REMOVE(ip, mp);
1253
1254 ASSERT(!vnode_refed);
1255 ASSERT(!(lock_flags &
1256 XFS_IOLOCK_SHARED));
1257 continue;
1258 }
1259
1260 ASSERT(ip->i_mount == mp);
1261
1262 if (xfs_ilock_nowait(ip,
1263 XFS_ILOCK_SHARED) == 0) {
1264 ASSERT(ip->i_mount == mp);
1265 /*
1266 * We failed to reacquire
1267 * the inode lock without
1268 * sleeping, so just skip
1269 * the inode for now. We
1270 * clear the ILOCK bit from
1271 * the lock_flags so that we
1272 * won't try to drop a lock
1273 * we don't hold below.
1274 */
1275 lock_flags &= ~XFS_ILOCK_SHARED;
1276 IPOINTER_REMOVE(ip_next, mp);
1277 } else if ((xfs_ipincount(ip) == 0) &&
1278 xfs_iflock_nowait(ip)) {
1279 ASSERT(ip->i_mount == mp);
1280 /*
1281 * Since this is vfs_sync()
1282 * calling we only flush the
1283 * inode out if we can lock
1284 * it without sleeping and
1285 * it is not pinned. Drop
1286 * the mount lock here so
1287 * that we don't hold it for
1288 * too long. We already have
1289 * a marker in the list here.
1290 */
1291 XFS_MOUNT_IUNLOCK(mp);
1292 mount_locked = B_FALSE;
1293 error = xfs_iflush(ip,
1294 XFS_IFLUSH_DELWRI);
1295 } else {
1296 ASSERT(ip->i_mount == mp);
1297 IPOINTER_REMOVE(ip_next, mp);
1298 }
1299 }
1300
1301 }
1302
1303 } else {
1304 if ((flags & SYNC_ATTR) &&
1305 ((ip->i_update_core) ||
1306 ((ip->i_itemp != NULL) &&
1307 (ip->i_itemp->ili_format.ilf_fields != 0)))) {
1308 if (mount_locked) {
1309 IPOINTER_INSERT(ip, mp);
1310 }
1311
1312 if (flags & SYNC_WAIT) {
1313 xfs_iflock(ip);
1314 error = xfs_iflush(ip,
1315 XFS_IFLUSH_SYNC);
1316 } else {
1317 /*
1318 * If we can't acquire the flush
1319 * lock, then the inode is already
1320 * being flushed so don't bother
1321 * waiting. If we can lock it then
1322 * do a delwri flush so we can
1323 * combine multiple inode flushes
1324 * in each disk write.
1325 */
1326 if (xfs_iflock_nowait(ip)) {
1327 error = xfs_iflush(ip,
1328 XFS_IFLUSH_DELWRI);
1329 }
1330 else if (bypassed)
1331 (*bypassed)++;
1332 }
1333 }
1334 }
1335
1336 if (lock_flags != 0) {
1337 xfs_iunlock(ip, lock_flags);
1338 }
1339
1340 if (vnode_refed) {
1341 /*
1342 * If we had to take a reference on the vnode
1343 * above, then wait until after we've unlocked
1344 * the inode to release the reference. This is
1345 * because we can be already holding the inode
1346 * lock when VN_RELE() calls xfs_inactive().
1347 *
1348 * Make sure to drop the mount lock before calling
1349 * VN_RELE() so that we don't trip over ourselves if
1350 * we have to go for the mount lock again in the
1351 * inactive code.
1352 */
1353 if (mount_locked) {
1354 IPOINTER_INSERT(ip, mp);
1355 }
1356
1357 VN_RELE(vp);
1358
1359 vnode_refed = B_FALSE;
1360 }
1361
1362 if (error) {
1363 last_error = error;
1364 }
1365
1366 /*
1367 * bail out if the filesystem is corrupted.
1368 */
1369 if (error == EFSCORRUPTED) {
1370 if (!mount_locked) {
1371 XFS_MOUNT_ILOCK(mp);
1372 IPOINTER_REMOVE(ip, mp);
1373 }
1374 XFS_MOUNT_IUNLOCK(mp);
1375 ASSERT(ipointer_in == B_FALSE);
1376 kmem_free(ipointer, sizeof(xfs_iptr_t));
1377 return XFS_ERROR(error);
1378 }
1379
1380 /* Let other threads have a chance at the mount lock
1381 * if we have looped many times without dropping the
1382 * lock.
1383 */
1384 if ((++preempt & XFS_PREEMPT_MASK) == 0) {
1385 if (mount_locked) {
1386 IPOINTER_INSERT(ip, mp);
1387 }
1388 }
1389
1390 if (mount_locked == B_FALSE) {
1391 XFS_MOUNT_ILOCK(mp);
1392 mount_locked = B_TRUE;
1393 IPOINTER_REMOVE(ip, mp);
1394 continue;
1395 }
1396
1397 ASSERT(ipointer_in == B_FALSE);
1398 ip = ip->i_mnext;
1399
1400 } while (ip != mp->m_inodes);
1401
1402 XFS_MOUNT_IUNLOCK(mp);
1403
1404 ASSERT(ipointer_in == B_FALSE);
1405
1406 kmem_free(ipointer, sizeof(xfs_iptr_t));
1407 return XFS_ERROR(last_error);
1408 }
1409
1410 /*
1411 * xfs sync routine for internal use
1412 *
1413 * This routine supports all of the flags defined for the generic VFS_SYNC
1414 * interface as explained above under xfs_sync. In the interests of not
1415 * changing interfaces within the 6.5 family, additional internallly-
1416 * required functions are specified within a separate xflags parameter,
1417 * only available by calling this routine.
1418 *
1419 */
1420 int
1421 xfs_syncsub(
1422 xfs_mount_t *mp,
1423 int flags,
1424 int xflags,
1425 int *bypassed)
1426 {
1427 int error = 0;
1428 int last_error = 0;
1429 uint log_flags = XFS_LOG_FORCE;
1430 xfs_buf_t *bp;
1431 xfs_buf_log_item_t *bip;
1432
1433 /*
1434 * Sync out the log. This ensures that the log is periodically
1435 * flushed even if there is not enough activity to fill it up.
1436 */
1437 if (flags & SYNC_WAIT)
1438 log_flags |= XFS_LOG_SYNC;
1439
1440 xfs_log_force(mp, (xfs_lsn_t)0, log_flags);
1441
1442 if (flags & (SYNC_ATTR|SYNC_DELWRI)) {
1443 if (flags & SYNC_BDFLUSH)
1444 xfs_finish_reclaim_all(mp, 1);
1445 else
1446 error = xfs_sync_inodes(mp, flags, xflags, bypassed);
1447 }
1448
1449 /*
1450 * Flushing out dirty data above probably generated more
1451 * log activity, so if this isn't vfs_sync() then flush
1452 * the log again.
1453 */
1454 if (flags & SYNC_DELWRI) {
1455 xfs_log_force(mp, (xfs_lsn_t)0, log_flags);
1456 }
1457
1458 if (flags & SYNC_FSDATA) {
1459 /*
1460 * If this is vfs_sync() then only sync the superblock
1461 * if we can lock it without sleeping and it is not pinned.
1462 */
1463 if (flags & SYNC_BDFLUSH) {
1464 bp = xfs_getsb(mp, XFS_BUF_TRYLOCK);
1465 if (bp != NULL) {
1466 bip = XFS_BUF_FSPRIVATE(bp,xfs_buf_log_item_t*);
1467 if ((bip != NULL) &&
1468 xfs_buf_item_dirty(bip)) {
1469 if (!(XFS_BUF_ISPINNED(bp))) {
1470 XFS_BUF_ASYNC(bp);
1471 error = xfs_bwrite(mp, bp);
1472 } else {
1473 xfs_buf_relse(bp);
1474 }
1475 } else {
1476 xfs_buf_relse(bp);
1477 }
1478 }
1479 } else {
1480 bp = xfs_getsb(mp, 0);
1481 /*
1482 * If the buffer is pinned then push on the log so
1483 * we won't get stuck waiting in the write for
1484 * someone, maybe ourselves, to flush the log.
1485 * Even though we just pushed the log above, we
1486 * did not have the superblock buffer locked at
1487 * that point so it can become pinned in between
1488 * there and here.
1489 */
1490 if (XFS_BUF_ISPINNED(bp))
1491 xfs_log_force(mp, (xfs_lsn_t)0, XFS_LOG_FORCE);
1492 if (flags & SYNC_WAIT)
1493 XFS_BUF_UNASYNC(bp);
1494 else
1495 XFS_BUF_ASYNC(bp);
1496 error = xfs_bwrite(mp, bp);
1497 }
1498 if (error) {
1499 last_error = error;
1500 }
1501 }
1502
1503 /*
1504 * If this is the periodic sync, then kick some entries out of
1505 * the reference cache. This ensures that idle entries are
1506 * eventually kicked out of the cache.
1507 */
1508 if (flags & SYNC_REFCACHE) {
1509 if (flags & SYNC_WAIT)
1510 xfs_refcache_purge_mp(mp);
1511 else
1512 xfs_refcache_purge_some(mp);
1513 }
1514
1515 /*
1516 * Now check to see if the log needs a "dummy" transaction.
1517 */
1518
1519 if (!(flags & SYNC_REMOUNT) && xfs_log_need_covered(mp)) {
1520 xfs_trans_t *tp;
1521 xfs_inode_t *ip;
1522
1523 /*
1524 * Put a dummy transaction in the log to tell
1525 * recovery that all others are OK.
1526 */
1527 tp = xfs_trans_alloc(mp, XFS_TRANS_DUMMY1);
1528 if ((error = xfs_trans_reserve(tp, 0,
1529 XFS_ICHANGE_LOG_RES(mp),
1530 0, 0, 0))) {
1531 xfs_trans_cancel(tp, 0);
1532 return error;
1533 }
1534
1535 ip = mp->m_rootip;
1536 xfs_ilock(ip, XFS_ILOCK_EXCL);
1537
1538 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
1539 xfs_trans_ihold(tp, ip);
1540 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1541 error = xfs_trans_commit(tp, 0, NULL);
1542 xfs_iunlock(ip, XFS_ILOCK_EXCL);
1543 xfs_log_force(mp, (xfs_lsn_t)0, log_flags);
1544 }
1545
1546 /*
1547 * When shutting down, we need to insure that the AIL is pushed
1548 * to disk or the filesystem can appear corrupt from the PROM.
1549 */
1550 if ((flags & (SYNC_CLOSE|SYNC_WAIT)) == (SYNC_CLOSE|SYNC_WAIT)) {
1551 XFS_bflush(mp->m_ddev_targp);
1552 if (mp->m_rtdev_targp) {
1553 XFS_bflush(mp->m_rtdev_targp);
1554 }
1555 }
1556
1557 return XFS_ERROR(last_error);
1558 }
1559
1560 /*
1561 * xfs_vget - called by DMAPI and NFSD to get vnode from file handle
1562 */
1563 STATIC int
1564 xfs_vget(
1565 bhv_desc_t *bdp,
1566 vnode_t **vpp,
1567 fid_t *fidp)
1568 {
1569 xfs_mount_t *mp = XFS_BHVTOM(bdp);
1570 xfs_fid_t *xfid = (struct xfs_fid *)fidp;
1571 xfs_inode_t *ip;
1572 int error;
1573 xfs_ino_t ino;
1574 unsigned int igen;
1575
1576 /*
1577 * Invalid. Since handles can be created in user space and passed in
1578 * via gethandle(), this is not cause for a panic.
1579 */
1580 if (xfid->xfs_fid_len != sizeof(*xfid) - sizeof(xfid->xfs_fid_len))
1581 return XFS_ERROR(EINVAL);
1582
1583 ino = xfid->xfs_fid_ino;
1584 igen = xfid->xfs_fid_gen;
1585
1586 /*
1587 * NFS can sometimes send requests for ino 0. Fail them gracefully.
1588 */
1589 if (ino == 0)
1590 return XFS_ERROR(ESTALE);
1591
1592 error = xfs_iget(mp, NULL, ino, 0, XFS_ILOCK_SHARED, &ip, 0);
1593 if (error) {
1594 *vpp = NULL;
1595 return error;
1596 }
1597
1598 if (ip == NULL) {
1599 *vpp = NULL;
1600 return XFS_ERROR(EIO);
1601 }
1602
1603 if (ip->i_d.di_mode == 0 || ip->i_d.di_gen != igen) {
1604 xfs_iput_new(ip, XFS_ILOCK_SHARED);
1605 *vpp = NULL;
1606 return XFS_ERROR(ENOENT);
1607 }
1608
1609 *vpp = XFS_ITOV(ip);
1610 xfs_iunlock(ip, XFS_ILOCK_SHARED);
1611 return 0;
1612 }
1613
1614
1615 #define MNTOPT_LOGBUFS "logbufs" /* number of XFS log buffers */
1616 #define MNTOPT_LOGBSIZE "logbsize" /* size of XFS log buffers */
1617 #define MNTOPT_LOGDEV "logdev" /* log device */
1618 #define MNTOPT_RTDEV "rtdev" /* realtime I/O device */
1619 #define MNTOPT_BIOSIZE "biosize" /* log2 of preferred buffered io size */
1620 #define MNTOPT_WSYNC "wsync" /* safe-mode nfs compatible mount */
1621 #define MNTOPT_INO64 "ino64" /* force inodes into 64-bit range */
1622 #define MNTOPT_NOALIGN "noalign" /* turn off stripe alignment */
1623 #define MNTOPT_SWALLOC "swalloc" /* turn on stripe width allocation */
1624 #define MNTOPT_SUNIT "sunit" /* data volume stripe unit */
1625 #define MNTOPT_SWIDTH "swidth" /* data volume stripe width */
1626 #define MNTOPT_NOUUID "nouuid" /* ignore filesystem UUID */
1627 #define MNTOPT_MTPT "mtpt" /* filesystem mount point */
1628 #define MNTOPT_GRPID "grpid" /* group-ID from parent directory */
1629 #define MNTOPT_NOGRPID "nogrpid" /* group-ID from current process */
1630 #define MNTOPT_BSDGROUPS "bsdgroups" /* group-ID from parent directory */
1631 #define MNTOPT_SYSVGROUPS "sysvgroups" /* group-ID from current process */
1632 #define MNTOPT_ALLOCSIZE "allocsize" /* preferred allocation size */
1633 #define MNTOPT_IHASHSIZE "ihashsize" /* size of inode hash table */
1634 #define MNTOPT_NORECOVERY "norecovery" /* don't run XFS recovery */
1635 #define MNTOPT_BARRIER "barrier" /* use writer barriers for log write and
1636 * unwritten extent conversion */
1637 #define MNTOPT_OSYNCISOSYNC "osyncisosync" /* o_sync is REALLY o_sync */
1638 #define MNTOPT_64BITINODE "inode64" /* inodes can be allocated anywhere */
1639 #define MNTOPT_IKEEP "ikeep" /* do not free empty inode clusters */
1640 #define MNTOPT_NOIKEEP "noikeep" /* free empty inode clusters */
1641 #define MNTOPT_LARGEIO "largeio" /* report large I/O sizes in stat() */
1642 #define MNTOPT_NOLARGEIO "nolargeio" /* do not report large I/O sizes
1643 * in stat(). */
1644 #define MNTOPT_ATTR2 "attr2" /* do use attr2 attribute format */
1645 #define MNTOPT_NOATTR2 "noattr2" /* do not use attr2 attribute format */
1646
1647 STATIC unsigned long
1648 suffix_strtoul(const char *cp, char **endp, unsigned int base)
1649 {
1650 int last, shift_left_factor = 0;
1651 char *value = (char *)cp;
1652
1653 last = strlen(value) - 1;
1654 if (value[last] == 'K' || value[last] == 'k') {
1655 shift_left_factor = 10;
1656 value[last] = '\0';
1657 }
1658 if (value[last] == 'M' || value[last] == 'm') {
1659 shift_left_factor = 20;
1660 value[last] = '\0';
1661 }
1662 if (value[last] == 'G' || value[last] == 'g') {
1663 shift_left_factor = 30;
1664 value[last] = '\0';
1665 }
1666
1667 return simple_strtoul(cp, endp, base) << shift_left_factor;
1668 }
1669
1670 STATIC int
1671 xfs_parseargs(
1672 struct bhv_desc *bhv,
1673 char *options,
1674 struct xfs_mount_args *args,
1675 int update)
1676 {
1677 struct vfs *vfsp = bhvtovfs(bhv);
1678 char *this_char, *value, *eov;
1679 int dsunit, dswidth, vol_dsunit, vol_dswidth;
1680 int iosize;
1681
1682 args->flags2 |= XFSMNT2_COMPAT_IOSIZE;
1683 args->flags |= XFSMNT_COMPAT_ATTR;
1684
1685 #if 0 /* XXX: off by default, until some remaining issues ironed out */
1686 args->flags |= XFSMNT_IDELETE; /* default to on */
1687 #endif
1688
1689 if (!options)
1690 goto done;
1691
1692 iosize = dsunit = dswidth = vol_dsunit = vol_dswidth = 0;
1693
1694 while ((this_char = strsep(&options, ",")) != NULL) {
1695 if (!*this_char)
1696 continue;
1697 if ((value = strchr(this_char, '=')) != NULL)
1698 *value++ = 0;
1699
1700 if (!strcmp(this_char, MNTOPT_LOGBUFS)) {
1701 if (!value || !*value) {
1702 printk("XFS: %s option requires an argument\n",
1703 this_char);
1704 return EINVAL;
1705 }
1706 args->logbufs = simple_strtoul(value, &eov, 10);
1707 } else if (!strcmp(this_char, MNTOPT_LOGBSIZE)) {
1708 if (!value || !*value) {
1709 printk("XFS: %s option requires an argument\n",
1710 this_char);
1711 return EINVAL;
1712 }
1713 args->logbufsize = suffix_strtoul(value, &eov, 10);
1714 } else if (!strcmp(this_char, MNTOPT_LOGDEV)) {
1715 if (!value || !*value) {
1716 printk("XFS: %s option requires an argument\n",
1717 this_char);
1718 return EINVAL;
1719 }
1720 strncpy(args->logname, value, MAXNAMELEN);
1721 } else if (!strcmp(this_char, MNTOPT_MTPT)) {
1722 if (!value || !*value) {
1723 printk("XFS: %s option requires an argument\n",
1724 this_char);
1725 return EINVAL;
1726 }
1727 strncpy(args->mtpt, value, MAXNAMELEN);
1728 } else if (!strcmp(this_char, MNTOPT_RTDEV)) {
1729 if (!value || !*value) {
1730 printk("XFS: %s option requires an argument\n",
1731 this_char);
1732 return EINVAL;
1733 }
1734 strncpy(args->rtname, value, MAXNAMELEN);
1735 } else if (!strcmp(this_char, MNTOPT_BIOSIZE)) {
1736 if (!value || !*value) {
1737 printk("XFS: %s option requires an argument\n",
1738 this_char);
1739 return EINVAL;
1740 }
1741 iosize = simple_strtoul(value, &eov, 10);
1742 args->flags |= XFSMNT_IOSIZE;
1743 args->iosizelog = (uint8_t) iosize;
1744 } else if (!strcmp(this_char, MNTOPT_ALLOCSIZE)) {
1745 if (!value || !*value) {
1746 printk("XFS: %s option requires an argument\n",
1747 this_char);
1748 return EINVAL;
1749 }
1750 iosize = suffix_strtoul(value, &eov, 10);
1751 args->flags |= XFSMNT_IOSIZE;
1752 args->iosizelog = ffs(iosize) - 1;
1753 } else if (!strcmp(this_char, MNTOPT_IHASHSIZE)) {
1754 if (!value || !*value) {
1755 printk("XFS: %s option requires an argument\n",
1756 this_char);
1757 return EINVAL;
1758 }
1759 args->flags |= XFSMNT_IHASHSIZE;
1760 args->ihashsize = simple_strtoul(value, &eov, 10);
1761 } else if (!strcmp(this_char, MNTOPT_GRPID) ||
1762 !strcmp(this_char, MNTOPT_BSDGROUPS)) {
1763 vfsp->vfs_flag |= VFS_GRPID;
1764 } else if (!strcmp(this_char, MNTOPT_NOGRPID) ||
1765 !strcmp(this_char, MNTOPT_SYSVGROUPS)) {
1766 vfsp->vfs_flag &= ~VFS_GRPID;
1767 } else if (!strcmp(this_char, MNTOPT_WSYNC)) {
1768 args->flags |= XFSMNT_WSYNC;
1769 } else if (!strcmp(this_char, MNTOPT_OSYNCISOSYNC)) {
1770 args->flags |= XFSMNT_OSYNCISOSYNC;
1771 } else if (!strcmp(this_char, MNTOPT_NORECOVERY)) {
1772 args->flags |= XFSMNT_NORECOVERY;
1773 } else if (!strcmp(this_char, MNTOPT_INO64)) {
1774 args->flags |= XFSMNT_INO64;
1775 #if !XFS_BIG_INUMS
1776 printk("XFS: %s option not allowed on this system\n",
1777 this_char);
1778 return EINVAL;
1779 #endif
1780 } else if (!strcmp(this_char, MNTOPT_NOALIGN)) {
1781 args->flags |= XFSMNT_NOALIGN;
1782 } else if (!strcmp(this_char, MNTOPT_SWALLOC)) {
1783 args->flags |= XFSMNT_SWALLOC;
1784 } else if (!strcmp(this_char, MNTOPT_SUNIT)) {
1785 if (!value || !*value) {
1786 printk("XFS: %s option requires an argument\n",
1787 this_char);
1788 return EINVAL;
1789 }
1790 dsunit = simple_strtoul(value, &eov, 10);
1791 } else if (!strcmp(this_char, MNTOPT_SWIDTH)) {
1792 if (!value || !*value) {
1793 printk("XFS: %s option requires an argument\n",
1794 this_char);
1795 return EINVAL;
1796 }
1797 dswidth = simple_strtoul(value, &eov, 10);
1798 } else if (!strcmp(this_char, MNTOPT_64BITINODE)) {
1799 args->flags &= ~XFSMNT_32BITINODES;
1800 #if !XFS_BIG_INUMS
1801 printk("XFS: %s option not allowed on this system\n",
1802 this_char);
1803 return EINVAL;
1804 #endif
1805 } else if (!strcmp(this_char, MNTOPT_NOUUID)) {
1806 args->flags |= XFSMNT_NOUUID;
1807 } else if (!strcmp(this_char, MNTOPT_BARRIER)) {
1808 args->flags |= XFSMNT_BARRIER;
1809 } else if (!strcmp(this_char, MNTOPT_IKEEP)) {
1810 args->flags &= ~XFSMNT_IDELETE;
1811 } else if (!strcmp(this_char, MNTOPT_NOIKEEP)) {
1812 args->flags |= XFSMNT_IDELETE;
1813 } else if (!strcmp(this_char, MNTOPT_LARGEIO)) {
1814 args->flags2 &= ~XFSMNT2_COMPAT_IOSIZE;
1815 } else if (!strcmp(this_char, MNTOPT_NOLARGEIO)) {
1816 args->flags2 |= XFSMNT2_COMPAT_IOSIZE;
1817 } else if (!strcmp(this_char, MNTOPT_ATTR2)) {
1818 args->flags &= ~XFSMNT_COMPAT_ATTR;
1819 } else if (!strcmp(this_char, MNTOPT_NOATTR2)) {
1820 args->flags |= XFSMNT_COMPAT_ATTR;
1821 } else if (!strcmp(this_char, "osyncisdsync")) {
1822 /* no-op, this is now the default */
1823 printk("XFS: osyncisdsync is now the default, option is deprecated.\n");
1824 } else if (!strcmp(this_char, "irixsgid")) {
1825 printk("XFS: irixsgid is now a sysctl(2) variable, option is deprecated.\n");
1826 } else {
1827 printk("XFS: unknown mount option [%s].\n", this_char);
1828 return EINVAL;
1829 }
1830 }
1831
1832 if (args->flags & XFSMNT_NORECOVERY) {
1833 if ((vfsp->vfs_flag & VFS_RDONLY) == 0) {
1834 printk("XFS: no-recovery mounts must be read-only.\n");
1835 return EINVAL;
1836 }
1837 }
1838
1839 if ((args->flags & XFSMNT_NOALIGN) && (dsunit || dswidth)) {
1840 printk(
1841 "XFS: sunit and swidth options incompatible with the noalign option\n");
1842 return EINVAL;
1843 }
1844
1845 if ((dsunit && !dswidth) || (!dsunit && dswidth)) {
1846 printk("XFS: sunit and swidth must be specified together\n");
1847 return EINVAL;
1848 }
1849
1850 if (dsunit && (dswidth % dsunit != 0)) {
1851 printk(
1852 "XFS: stripe width (%d) must be a multiple of the stripe unit (%d)\n",
1853 dswidth, dsunit);
1854 return EINVAL;
1855 }
1856
1857 if ((args->flags & XFSMNT_NOALIGN) != XFSMNT_NOALIGN) {
1858 if (dsunit) {
1859 args->sunit = dsunit;
1860 args->flags |= XFSMNT_RETERR;
1861 } else {
1862 args->sunit = vol_dsunit;
1863 }
1864 dswidth ? (args->swidth = dswidth) :
1865 (args->swidth = vol_dswidth);
1866 } else {
1867 args->sunit = args->swidth = 0;
1868 }
1869
1870 done:
1871 if (args->flags & XFSMNT_32BITINODES)
1872 vfsp->vfs_flag |= VFS_32BITINODES;
1873 if (args->flags2)
1874 args->flags |= XFSMNT_FLAGS2;
1875 return 0;
1876 }
1877
1878 STATIC int
1879 xfs_showargs(
1880 struct bhv_desc *bhv,
1881 struct seq_file *m)
1882 {
1883 static struct proc_xfs_info {
1884 int flag;
1885 char *str;
1886 } xfs_info[] = {
1887 /* the few simple ones we can get from the mount struct */
1888 { XFS_MOUNT_WSYNC, "," MNTOPT_WSYNC },
1889 { XFS_MOUNT_INO64, "," MNTOPT_INO64 },
1890 { XFS_MOUNT_NOALIGN, "," MNTOPT_NOALIGN },
1891 { XFS_MOUNT_SWALLOC, "," MNTOPT_SWALLOC },
1892 { XFS_MOUNT_NOUUID, "," MNTOPT_NOUUID },
1893 { XFS_MOUNT_NORECOVERY, "," MNTOPT_NORECOVERY },
1894 { XFS_MOUNT_OSYNCISOSYNC, "," MNTOPT_OSYNCISOSYNC },
1895 { XFS_MOUNT_BARRIER, "," MNTOPT_BARRIER },
1896 { XFS_MOUNT_IDELETE, "," MNTOPT_NOIKEEP },
1897 { 0, NULL }
1898 };
1899 struct proc_xfs_info *xfs_infop;
1900 struct xfs_mount *mp = XFS_BHVTOM(bhv);
1901 struct vfs *vfsp = XFS_MTOVFS(mp);
1902
1903 for (xfs_infop = xfs_info; xfs_infop->flag; xfs_infop++) {
1904 if (mp->m_flags & xfs_infop->flag)
1905 seq_puts(m, xfs_infop->str);
1906 }
1907
1908 if (mp->m_flags & XFS_MOUNT_IHASHSIZE)
1909 seq_printf(m, "," MNTOPT_IHASHSIZE "=%d", mp->m_ihsize);
1910
1911 if (mp->m_flags & XFS_MOUNT_DFLT_IOSIZE)
1912 seq_printf(m, "," MNTOPT_ALLOCSIZE "=%dk",
1913 (int)(1 << mp->m_writeio_log) >> 10);
1914
1915 if (mp->m_logbufs > 0)
1916 seq_printf(m, "," MNTOPT_LOGBUFS "=%d", mp->m_logbufs);
1917
1918 if (mp->m_logbsize > 0)
1919 seq_printf(m, "," MNTOPT_LOGBSIZE "=%dk", mp->m_logbsize >> 10);
1920
1921 if (mp->m_logname)
1922 seq_printf(m, "," MNTOPT_LOGDEV "=%s", mp->m_logname);
1923
1924 if (mp->m_rtname)
1925 seq_printf(m, "," MNTOPT_RTDEV "=%s", mp->m_rtname);
1926
1927 if (mp->m_dalign > 0)
1928 seq_printf(m, "," MNTOPT_SUNIT "=%d",
1929 (int)XFS_FSB_TO_BB(mp, mp->m_dalign));
1930
1931 if (mp->m_swidth > 0)
1932 seq_printf(m, "," MNTOPT_SWIDTH "=%d",
1933 (int)XFS_FSB_TO_BB(mp, mp->m_swidth));
1934
1935 if (!(mp->m_flags & XFS_MOUNT_COMPAT_ATTR))
1936 seq_printf(m, "," MNTOPT_ATTR2);
1937
1938 if (!(mp->m_flags & XFS_MOUNT_COMPAT_IOSIZE))
1939 seq_printf(m, "," MNTOPT_LARGEIO);
1940
1941 if (!(vfsp->vfs_flag & VFS_32BITINODES))
1942 seq_printf(m, "," MNTOPT_64BITINODE);
1943
1944 if (vfsp->vfs_flag & VFS_GRPID)
1945 seq_printf(m, "," MNTOPT_GRPID);
1946
1947 return 0;
1948 }
1949
1950 STATIC void
1951 xfs_freeze(
1952 bhv_desc_t *bdp)
1953 {
1954 xfs_mount_t *mp = XFS_BHVTOM(bdp);
1955
1956 while (atomic_read(&mp->m_active_trans) > 0)
1957 delay(100);
1958
1959 /* Push the superblock and write an unmount record */
1960 xfs_log_unmount_write(mp);
1961 xfs_unmountfs_writesb(mp);
1962 }
1963
1964
1965 vfsops_t xfs_vfsops = {
1966 BHV_IDENTITY_INIT(VFS_BHV_XFS,VFS_POSITION_XFS),
1967 .vfs_parseargs = xfs_parseargs,
1968 .vfs_showargs = xfs_showargs,
1969 .vfs_mount = xfs_mount,
1970 .vfs_unmount = xfs_unmount,
1971 .vfs_mntupdate = xfs_mntupdate,
1972 .vfs_root = xfs_root,
1973 .vfs_statvfs = xfs_statvfs,
1974 .vfs_sync = xfs_sync,
1975 .vfs_vget = xfs_vget,
1976 .vfs_dmapiops = (vfs_dmapiops_t)fs_nosys,
1977 .vfs_quotactl = (vfs_quotactl_t)fs_nosys,
1978 .vfs_init_vnode = xfs_initialize_vnode,
1979 .vfs_force_shutdown = xfs_do_force_shutdown,
1980 .vfs_freeze = xfs_freeze,
1981 };
linux v2.6.22.y-op