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[PATCH] USB: Au1xx0: replace casual readl() with au_readl() in the drivers
[linux-2.6/linux-mips.git] / fs / xfs / xfs_vfsops.c
blobb6ad370fab3d839d7ff792ca9c03a33bf17a8b3f
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_inode_zone = kmem_zone_init(sizeof(xfs_inode_t), "xfs_inode");
81 xfs_trans_zone = kmem_zone_init(sizeof(xfs_trans_t), "xfs_trans");
82 xfs_da_state_zone =
83 kmem_zone_init(sizeof(xfs_da_state_t), "xfs_da_state");
84 xfs_dabuf_zone = kmem_zone_init(sizeof(xfs_dabuf_t), "xfs_dabuf");
85
86 /*
87 * The size of the zone allocated buf log item is the maximum
88 * size possible under XFS. This wastes a little bit of memory,
89 * but it is much faster.
90 */
91 xfs_buf_item_zone =
92 kmem_zone_init((sizeof(xfs_buf_log_item_t) +
93 (((XFS_MAX_BLOCKSIZE / XFS_BLI_CHUNK) /
94 NBWORD) * sizeof(int))),
95 "xfs_buf_item");
96 xfs_efd_zone = kmem_zone_init((sizeof(xfs_efd_log_item_t) +
97 ((XFS_EFD_MAX_FAST_EXTENTS - 1) * sizeof(xfs_extent_t))),
98 "xfs_efd_item");
99 xfs_efi_zone = kmem_zone_init((sizeof(xfs_efi_log_item_t) +
100 ((XFS_EFI_MAX_FAST_EXTENTS - 1) * sizeof(xfs_extent_t))),
101 "xfs_efi_item");
102 xfs_ifork_zone = kmem_zone_init(sizeof(xfs_ifork_t), "xfs_ifork");
103 xfs_ili_zone = kmem_zone_init(sizeof(xfs_inode_log_item_t), "xfs_ili");
104 xfs_chashlist_zone = kmem_zone_init(sizeof(xfs_chashlist_t),
105 "xfs_chashlist");
106 xfs_acl_zone_init(xfs_acl_zone, "xfs_acl");
107
108 /*
109 * Allocate global trace buffers.
110 */
111 #ifdef XFS_ALLOC_TRACE
112 xfs_alloc_trace_buf = ktrace_alloc(XFS_ALLOC_TRACE_SIZE, KM_SLEEP);
113 #endif
114 #ifdef XFS_BMAP_TRACE
115 xfs_bmap_trace_buf = ktrace_alloc(XFS_BMAP_TRACE_SIZE, KM_SLEEP);
116 #endif
117 #ifdef XFS_BMBT_TRACE
118 xfs_bmbt_trace_buf = ktrace_alloc(XFS_BMBT_TRACE_SIZE, KM_SLEEP);
119 #endif
120 #ifdef XFS_DIR_TRACE
121 xfs_dir_trace_buf = ktrace_alloc(XFS_DIR_TRACE_SIZE, KM_SLEEP);
122 #endif
123 #ifdef XFS_ATTR_TRACE
124 xfs_attr_trace_buf = ktrace_alloc(XFS_ATTR_TRACE_SIZE, KM_SLEEP);
125 #endif
126 #ifdef XFS_DIR2_TRACE
127 xfs_dir2_trace_buf = ktrace_alloc(XFS_DIR2_GTRACE_SIZE, KM_SLEEP);
128 #endif
129
130 xfs_dir_startup();
131
132 #if (defined(DEBUG) || defined(INDUCE_IO_ERROR))
133 xfs_error_test_init();
134 #endif /* DEBUG || INDUCE_IO_ERROR */
135
136 xfs_init_procfs();
137 xfs_sysctl_register();
138 return 0;
139 }
140
141 void
142 xfs_cleanup(void)
143 {
144 extern kmem_zone_t *xfs_bmap_free_item_zone;
145 extern kmem_zone_t *xfs_btree_cur_zone;
146 extern kmem_zone_t *xfs_inode_zone;
147 extern kmem_zone_t *xfs_trans_zone;
148 extern kmem_zone_t *xfs_da_state_zone;
149 extern kmem_zone_t *xfs_dabuf_zone;
150 extern kmem_zone_t *xfs_efd_zone;
151 extern kmem_zone_t *xfs_efi_zone;
152 extern kmem_zone_t *xfs_buf_item_zone;
153 extern kmem_zone_t *xfs_chashlist_zone;
154
155 xfs_cleanup_procfs();
156 xfs_sysctl_unregister();
157 xfs_refcache_destroy();
158 xfs_acl_zone_destroy(xfs_acl_zone);
159
160 #ifdef XFS_DIR2_TRACE
161 ktrace_free(xfs_dir2_trace_buf);
162 #endif
163 #ifdef XFS_ATTR_TRACE
164 ktrace_free(xfs_attr_trace_buf);
165 #endif
166 #ifdef XFS_DIR_TRACE
167 ktrace_free(xfs_dir_trace_buf);
168 #endif
169 #ifdef XFS_BMBT_TRACE
170 ktrace_free(xfs_bmbt_trace_buf);
171 #endif
172 #ifdef XFS_BMAP_TRACE
173 ktrace_free(xfs_bmap_trace_buf);
174 #endif
175 #ifdef XFS_ALLOC_TRACE
176 ktrace_free(xfs_alloc_trace_buf);
177 #endif
178
179 kmem_cache_destroy(xfs_bmap_free_item_zone);
180 kmem_cache_destroy(xfs_btree_cur_zone);
181 kmem_cache_destroy(xfs_inode_zone);
182 kmem_cache_destroy(xfs_trans_zone);
183 kmem_cache_destroy(xfs_da_state_zone);
184 kmem_cache_destroy(xfs_dabuf_zone);
185 kmem_cache_destroy(xfs_buf_item_zone);
186 kmem_cache_destroy(xfs_efd_zone);
187 kmem_cache_destroy(xfs_efi_zone);
188 kmem_cache_destroy(xfs_ifork_zone);
189 kmem_cache_destroy(xfs_ili_zone);
190 kmem_cache_destroy(xfs_chashlist_zone);
191 }
192
193 /*
194 * xfs_start_flags
195 *
196 * This function fills in xfs_mount_t fields based on mount args.
197 * Note: the superblock has _not_ yet been read in.
198 */
199 STATIC int
200 xfs_start_flags(
201 struct vfs *vfs,
202 struct xfs_mount_args *ap,
203 struct xfs_mount *mp)
204 {
205 /* Values are in BBs */
206 if ((ap->flags & XFSMNT_NOALIGN) != XFSMNT_NOALIGN) {
207 /*
208 * At this point the superblock has not been read
209 * in, therefore we do not know the block size.
210 * Before the mount call ends we will convert
211 * these to FSBs.
212 */
213 mp->m_dalign = ap->sunit;
214 mp->m_swidth = ap->swidth;
215 }
216
217 if (ap->logbufs != -1 &&
218 ap->logbufs != 0 &&
219 (ap->logbufs < XLOG_MIN_ICLOGS ||
220 ap->logbufs > XLOG_MAX_ICLOGS)) {
221 cmn_err(CE_WARN,
222 "XFS: invalid logbufs value: %d [not %d-%d]",
223 ap->logbufs, XLOG_MIN_ICLOGS, XLOG_MAX_ICLOGS);
224 return XFS_ERROR(EINVAL);
225 }
226 mp->m_logbufs = ap->logbufs;
227 if (ap->logbufsize != -1 &&
228 ap->logbufsize != 0 &&
229 ap->logbufsize != 16 * 1024 &&
230 ap->logbufsize != 32 * 1024 &&
231 ap->logbufsize != 64 * 1024 &&
232 ap->logbufsize != 128 * 1024 &&
233 ap->logbufsize != 256 * 1024) {
234 cmn_err(CE_WARN,
235 "XFS: invalid logbufsize: %d [not 16k,32k,64k,128k or 256k]",
236 ap->logbufsize);
237 return XFS_ERROR(EINVAL);
238 }
239 mp->m_ihsize = ap->ihashsize;
240 mp->m_logbsize = ap->logbufsize;
241 mp->m_fsname_len = strlen(ap->fsname) + 1;
242 mp->m_fsname = kmem_alloc(mp->m_fsname_len, KM_SLEEP);
243 strcpy(mp->m_fsname, ap->fsname);
244 if (ap->rtname[0]) {
245 mp->m_rtname = kmem_alloc(strlen(ap->rtname) + 1, KM_SLEEP);
246 strcpy(mp->m_rtname, ap->rtname);
247 }
248 if (ap->logname[0]) {
249 mp->m_logname = kmem_alloc(strlen(ap->logname) + 1, KM_SLEEP);
250 strcpy(mp->m_logname, ap->logname);
251 }
252
253 if (ap->flags & XFSMNT_WSYNC)
254 mp->m_flags |= XFS_MOUNT_WSYNC;
255 #if XFS_BIG_INUMS
256 if (ap->flags & XFSMNT_INO64) {
257 mp->m_flags |= XFS_MOUNT_INO64;
258 mp->m_inoadd = XFS_INO64_OFFSET;
259 }
260 #endif
261 if (ap->flags & XFSMNT_NOATIME)
262 mp->m_flags |= XFS_MOUNT_NOATIME;
263 if (ap->flags & XFSMNT_RETERR)
264 mp->m_flags |= XFS_MOUNT_RETERR;
265 if (ap->flags & XFSMNT_NOALIGN)
266 mp->m_flags |= XFS_MOUNT_NOALIGN;
267 if (ap->flags & XFSMNT_SWALLOC)
268 mp->m_flags |= XFS_MOUNT_SWALLOC;
269 if (ap->flags & XFSMNT_OSYNCISOSYNC)
270 mp->m_flags |= XFS_MOUNT_OSYNCISOSYNC;
271 if (ap->flags & XFSMNT_32BITINODES)
272 mp->m_flags |= XFS_MOUNT_32BITINODES;
273
274 if (ap->flags & XFSMNT_IOSIZE) {
275 if (ap->iosizelog > XFS_MAX_IO_LOG ||
276 ap->iosizelog < XFS_MIN_IO_LOG) {
277 cmn_err(CE_WARN,
278 "XFS: invalid log iosize: %d [not %d-%d]",
279 ap->iosizelog, XFS_MIN_IO_LOG,
280 XFS_MAX_IO_LOG);
281 return XFS_ERROR(EINVAL);
282 }
283
284 mp->m_flags |= XFS_MOUNT_DFLT_IOSIZE;
285 mp->m_readio_log = mp->m_writeio_log = ap->iosizelog;
286 }
287
288 if (ap->flags & XFSMNT_IHASHSIZE)
289 mp->m_flags |= XFS_MOUNT_IHASHSIZE;
290 if (ap->flags & XFSMNT_IDELETE)
291 mp->m_flags |= XFS_MOUNT_IDELETE;
292 if (ap->flags & XFSMNT_DIRSYNC)
293 mp->m_flags |= XFS_MOUNT_DIRSYNC;
294 if (ap->flags & XFSMNT_ATTR2)
295 mp->m_flags |= XFS_MOUNT_ATTR2;
296
297 if (ap->flags2 & XFSMNT2_COMPAT_IOSIZE)
298 mp->m_flags |= XFS_MOUNT_COMPAT_IOSIZE;
299
300 /*
301 * no recovery flag requires a read-only mount
302 */
303 if (ap->flags & XFSMNT_NORECOVERY) {
304 if (!(vfs->vfs_flag & VFS_RDONLY)) {
305 cmn_err(CE_WARN,
306 "XFS: tried to mount a FS read-write without recovery!");
307 return XFS_ERROR(EINVAL);
308 }
309 mp->m_flags |= XFS_MOUNT_NORECOVERY;
310 }
311
312 if (ap->flags & XFSMNT_NOUUID)
313 mp->m_flags |= XFS_MOUNT_NOUUID;
314 if (ap->flags & XFSMNT_BARRIER)
315 mp->m_flags |= XFS_MOUNT_BARRIER;
316 else
317 mp->m_flags &= ~XFS_MOUNT_BARRIER;
318
319 return 0;
320 }
321
322 /*
323 * This function fills in xfs_mount_t fields based on mount args.
324 * Note: the superblock _has_ now been read in.
325 */
326 STATIC int
327 xfs_finish_flags(
328 struct vfs *vfs,
329 struct xfs_mount_args *ap,
330 struct xfs_mount *mp)
331 {
332 int ronly = (vfs->vfs_flag & VFS_RDONLY);
333
334 /* Fail a mount where the logbuf is smaller then the log stripe */
335 if (XFS_SB_VERSION_HASLOGV2(&mp->m_sb)) {
336 if ((ap->logbufsize <= 0) &&
337 (mp->m_sb.sb_logsunit > XLOG_BIG_RECORD_BSIZE)) {
338 mp->m_logbsize = mp->m_sb.sb_logsunit;
339 } else if (ap->logbufsize > 0 &&
340 ap->logbufsize < mp->m_sb.sb_logsunit) {
341 cmn_err(CE_WARN,
342 "XFS: logbuf size must be greater than or equal to log stripe size");
343 return XFS_ERROR(EINVAL);
344 }
345 } else {
346 /* Fail a mount if the logbuf is larger than 32K */
347 if (ap->logbufsize > XLOG_BIG_RECORD_BSIZE) {
348 cmn_err(CE_WARN,
349 "XFS: logbuf size for version 1 logs must be 16K or 32K");
350 return XFS_ERROR(EINVAL);
351 }
352 }
353
354 if (XFS_SB_VERSION_HASATTR2(&mp->m_sb)) {
355 mp->m_flags |= XFS_MOUNT_ATTR2;
356 }
357
358 /*
359 * prohibit r/w mounts of read-only filesystems
360 */
361 if ((mp->m_sb.sb_flags & XFS_SBF_READONLY) && !ronly) {
362 cmn_err(CE_WARN,
363 "XFS: cannot mount a read-only filesystem as read-write");
364 return XFS_ERROR(EROFS);
365 }
366
367 /*
368 * check for shared mount.
369 */
370 if (ap->flags & XFSMNT_SHARED) {
371 if (!XFS_SB_VERSION_HASSHARED(&mp->m_sb))
372 return XFS_ERROR(EINVAL);
373
374 /*
375 * For IRIX 6.5, shared mounts must have the shared
376 * version bit set, have the persistent readonly
377 * field set, must be version 0 and can only be mounted
378 * read-only.
379 */
380 if (!ronly || !(mp->m_sb.sb_flags & XFS_SBF_READONLY) ||
381 (mp->m_sb.sb_shared_vn != 0))
382 return XFS_ERROR(EINVAL);
383
384 mp->m_flags |= XFS_MOUNT_SHARED;
385
386 /*
387 * Shared XFS V0 can't deal with DMI. Return EINVAL.
388 */
389 if (mp->m_sb.sb_shared_vn == 0 && (ap->flags & XFSMNT_DMAPI))
390 return XFS_ERROR(EINVAL);
391 }
392
393 return 0;
394 }
395
396 /*
397 * xfs_mount
398 *
399 * The file system configurations are:
400 * (1) device (partition) with data and internal log
401 * (2) logical volume with data and log subvolumes.
402 * (3) logical volume with data, log, and realtime subvolumes.
403 *
404 * We only have to handle opening the log and realtime volumes here if
405 * they are present. The data subvolume has already been opened by
406 * get_sb_bdev() and is stored in vfsp->vfs_super->s_bdev.
407 */
408 STATIC int
409 xfs_mount(
410 struct bhv_desc *bhvp,
411 struct xfs_mount_args *args,
412 cred_t *credp)
413 {
414 struct vfs *vfsp = bhvtovfs(bhvp);
415 struct bhv_desc *p;
416 struct xfs_mount *mp = XFS_BHVTOM(bhvp);
417 struct block_device *ddev, *logdev, *rtdev;
418 int flags = 0, error;
419
420 ddev = vfsp->vfs_super->s_bdev;
421 logdev = rtdev = NULL;
422
423 /*
424 * Setup xfs_mount function vectors from available behaviors
425 */
426 p = vfs_bhv_lookup(vfsp, VFS_POSITION_DM);
427 mp->m_dm_ops = p ? *(xfs_dmops_t *) vfs_bhv_custom(p) : xfs_dmcore_stub;
428 p = vfs_bhv_lookup(vfsp, VFS_POSITION_QM);
429 mp->m_qm_ops = p ? *(xfs_qmops_t *) vfs_bhv_custom(p) : xfs_qmcore_stub;
430 p = vfs_bhv_lookup(vfsp, VFS_POSITION_IO);
431 mp->m_io_ops = p ? *(xfs_ioops_t *) vfs_bhv_custom(p) : xfs_iocore_xfs;
432
433 /*
434 * Open real time and log devices - order is important.
435 */
436 if (args->logname[0]) {
437 error = xfs_blkdev_get(mp, args->logname, &logdev);
438 if (error)
439 return error;
440 }
441 if (args->rtname[0]) {
442 error = xfs_blkdev_get(mp, args->rtname, &rtdev);
443 if (error) {
444 xfs_blkdev_put(logdev);
445 return error;
446 }
447
448 if (rtdev == ddev || rtdev == logdev) {
449 cmn_err(CE_WARN,
450 "XFS: Cannot mount filesystem with identical rtdev and ddev/logdev.");
451 xfs_blkdev_put(logdev);
452 xfs_blkdev_put(rtdev);
453 return EINVAL;
454 }
455 }
456
457 /*
458 * Setup xfs_mount buffer target pointers
459 */
460 error = ENOMEM;
461 mp->m_ddev_targp = xfs_alloc_buftarg(ddev, 0);
462 if (!mp->m_ddev_targp) {
463 xfs_blkdev_put(logdev);
464 xfs_blkdev_put(rtdev);
465 return error;
466 }
467 if (rtdev) {
468 mp->m_rtdev_targp = xfs_alloc_buftarg(rtdev, 1);
469 if (!mp->m_rtdev_targp)
470 goto error0;
471 }
472 mp->m_logdev_targp = (logdev && logdev != ddev) ?
473 xfs_alloc_buftarg(logdev, 1) : mp->m_ddev_targp;
474 if (!mp->m_logdev_targp)
475 goto error0;
476
477 /*
478 * Setup flags based on mount(2) options and then the superblock
479 */
480 error = xfs_start_flags(vfsp, args, mp);
481 if (error)
482 goto error1;
483 error = xfs_readsb(mp);
484 if (error)
485 goto error1;
486 error = xfs_finish_flags(vfsp, args, mp);
487 if (error)
488 goto error2;
489
490 /*
491 * Setup xfs_mount buffer target pointers based on superblock
492 */
493 error = xfs_setsize_buftarg(mp->m_ddev_targp, mp->m_sb.sb_blocksize,
494 mp->m_sb.sb_sectsize);
495 if (!error && logdev && logdev != ddev) {
496 unsigned int log_sector_size = BBSIZE;
497
498 if (XFS_SB_VERSION_HASSECTOR(&mp->m_sb))
499 log_sector_size = mp->m_sb.sb_logsectsize;
500 error = xfs_setsize_buftarg(mp->m_logdev_targp,
501 mp->m_sb.sb_blocksize,
502 log_sector_size);
503 }
504 if (!error && rtdev)
505 error = xfs_setsize_buftarg(mp->m_rtdev_targp,
506 mp->m_sb.sb_blocksize,
507 mp->m_sb.sb_sectsize);
508 if (error)
509 goto error2;
510
511 if ((mp->m_flags & XFS_MOUNT_BARRIER) && !(vfsp->vfs_flag & VFS_RDONLY))
512 xfs_mountfs_check_barriers(mp);
513
514 error = XFS_IOINIT(vfsp, args, flags);
515 if (error)
516 goto error2;
517
518 return 0;
519
520 error2:
521 if (mp->m_sb_bp)
522 xfs_freesb(mp);
523 error1:
524 xfs_binval(mp->m_ddev_targp);
525 if (logdev && logdev != ddev)
526 xfs_binval(mp->m_logdev_targp);
527 if (rtdev)
528 xfs_binval(mp->m_rtdev_targp);
529 error0:
530 xfs_unmountfs_close(mp, credp);
531 return error;
532 }
533
534 STATIC int
535 xfs_unmount(
536 bhv_desc_t *bdp,
537 int flags,
538 cred_t *credp)
539 {
540 struct vfs *vfsp = bhvtovfs(bdp);
541 xfs_mount_t *mp = XFS_BHVTOM(bdp);
542 xfs_inode_t *rip;
543 vnode_t *rvp;
544 int unmount_event_wanted = 0;
545 int unmount_event_flags = 0;
546 int xfs_unmountfs_needed = 0;
547 int error;
548
549 rip = mp->m_rootip;
550 rvp = XFS_ITOV(rip);
551
552 if (vfsp->vfs_flag & VFS_DMI) {
553 error = XFS_SEND_PREUNMOUNT(mp, vfsp,
554 rvp, DM_RIGHT_NULL, rvp, DM_RIGHT_NULL,
555 NULL, NULL, 0, 0,
556 (mp->m_dmevmask & (1<<DM_EVENT_PREUNMOUNT))?
557 0:DM_FLAGS_UNWANTED);
558 if (error)
559 return XFS_ERROR(error);
560 unmount_event_wanted = 1;
561 unmount_event_flags = (mp->m_dmevmask & (1<<DM_EVENT_UNMOUNT))?
562 0 : DM_FLAGS_UNWANTED;
563 }
564
565 /*
566 * First blow any referenced inode from this file system
567 * out of the reference cache, and delete the timer.
568 */
569 xfs_refcache_purge_mp(mp);
570
571 XFS_bflush(mp->m_ddev_targp);
572 error = xfs_unmount_flush(mp, 0);
573 if (error)
574 goto out;
575
576 ASSERT(vn_count(rvp) == 1);
577
578 /*
579 * Drop the reference count
580 */
581 VN_RELE(rvp);
582
583 /*
584 * If we're forcing a shutdown, typically because of a media error,
585 * we want to make sure we invalidate dirty pages that belong to
586 * referenced vnodes as well.
587 */
588 if (XFS_FORCED_SHUTDOWN(mp)) {
589 error = xfs_sync(&mp->m_bhv,
590 (SYNC_WAIT | SYNC_CLOSE), credp);
591 ASSERT(error != EFSCORRUPTED);
592 }
593 xfs_unmountfs_needed = 1;
594
595 out:
596 /* Send DMAPI event, if required.
597 * Then do xfs_unmountfs() if needed.
598 * Then return error (or zero).
599 */
600 if (unmount_event_wanted) {
601 /* Note: mp structure must still exist for
602 * XFS_SEND_UNMOUNT() call.
603 */
604 XFS_SEND_UNMOUNT(mp, vfsp, error == 0 ? rvp : NULL,
605 DM_RIGHT_NULL, 0, error, unmount_event_flags);
606 }
607 if (xfs_unmountfs_needed) {
608 /*
609 * Call common unmount function to flush to disk
610 * and free the super block buffer & mount structures.
611 */
612 xfs_unmountfs(mp, credp);
613 }
614
615 return XFS_ERROR(error);
616 }
617
618 STATIC int
619 xfs_quiesce_fs(
620 xfs_mount_t *mp)
621 {
622 int count = 0, pincount;
623
624 xfs_refcache_purge_mp(mp);
625 xfs_flush_buftarg(mp->m_ddev_targp, 0);
626 xfs_finish_reclaim_all(mp, 0);
627
628 /* This loop must run at least twice.
629 * The first instance of the loop will flush
630 * most meta data but that will generate more
631 * meta data (typically directory updates).
632 * Which then must be flushed and logged before
633 * we can write the unmount record.
634 */
635 do {
636 xfs_syncsub(mp, SYNC_REMOUNT|SYNC_ATTR|SYNC_WAIT, 0, NULL);
637 pincount = xfs_flush_buftarg(mp->m_ddev_targp, 1);
638 if (!pincount) {
639 delay(50);
640 count++;
641 }
642 } while (count < 2);
643
644 return 0;
645 }
646
647 STATIC int
648 xfs_mntupdate(
649 bhv_desc_t *bdp,
650 int *flags,
651 struct xfs_mount_args *args)
652 {
653 struct vfs *vfsp = bhvtovfs(bdp);
654 xfs_mount_t *mp = XFS_BHVTOM(bdp);
655 int error;
656
657 if (args->flags & XFSMNT_NOATIME)
658 mp->m_flags |= XFS_MOUNT_NOATIME;
659 else
660 mp->m_flags &= ~XFS_MOUNT_NOATIME;
661
662 if (args->flags & XFSMNT_BARRIER)
663 mp->m_flags |= XFS_MOUNT_BARRIER;
664 else
665 mp->m_flags &= ~XFS_MOUNT_BARRIER;
666
667 if ((vfsp->vfs_flag & VFS_RDONLY) &&
668 !(*flags & MS_RDONLY)) {
669 vfsp->vfs_flag &= ~VFS_RDONLY;
670
671 if (args->flags & XFSMNT_BARRIER)
672 xfs_mountfs_check_barriers(mp);
673 }
674
675 if (!(vfsp->vfs_flag & VFS_RDONLY) &&
676 (*flags & MS_RDONLY)) {
677 VFS_SYNC(vfsp, SYNC_FSDATA|SYNC_BDFLUSH|SYNC_ATTR, NULL, error);
678
679 xfs_quiesce_fs(mp);
680
681 /* Ok now write out an unmount record */
682 xfs_log_unmount_write(mp);
683 xfs_unmountfs_writesb(mp);
684 vfsp->vfs_flag |= VFS_RDONLY;
685 }
686
687 return 0;
688 }
689
690 /*
691 * xfs_unmount_flush implements a set of flush operation on special
692 * inodes, which are needed as a separate set of operations so that
693 * they can be called as part of relocation process.
694 */
695 int
696 xfs_unmount_flush(
697 xfs_mount_t *mp, /* Mount structure we are getting
698 rid of. */
699 int relocation) /* Called from vfs relocation. */
700 {
701 xfs_inode_t *rip = mp->m_rootip;
702 xfs_inode_t *rbmip;
703 xfs_inode_t *rsumip = NULL;
704 vnode_t *rvp = XFS_ITOV(rip);
705 int error;
706
707 xfs_ilock(rip, XFS_ILOCK_EXCL);
708 xfs_iflock(rip);
709
710 /*
711 * Flush out the real time inodes.
712 */
713 if ((rbmip = mp->m_rbmip) != NULL) {
714 xfs_ilock(rbmip, XFS_ILOCK_EXCL);
715 xfs_iflock(rbmip);
716 error = xfs_iflush(rbmip, XFS_IFLUSH_SYNC);
717 xfs_iunlock(rbmip, XFS_ILOCK_EXCL);
718
719 if (error == EFSCORRUPTED)
720 goto fscorrupt_out;
721
722 ASSERT(vn_count(XFS_ITOV(rbmip)) == 1);
723
724 rsumip = mp->m_rsumip;
725 xfs_ilock(rsumip, XFS_ILOCK_EXCL);
726 xfs_iflock(rsumip);
727 error = xfs_iflush(rsumip, XFS_IFLUSH_SYNC);
728 xfs_iunlock(rsumip, XFS_ILOCK_EXCL);
729
730 if (error == EFSCORRUPTED)
731 goto fscorrupt_out;
732
733 ASSERT(vn_count(XFS_ITOV(rsumip)) == 1);
734 }
735
736 /*
737 * Synchronously flush root inode to disk
738 */
739 error = xfs_iflush(rip, XFS_IFLUSH_SYNC);
740 if (error == EFSCORRUPTED)
741 goto fscorrupt_out2;
742
743 if (vn_count(rvp) != 1 && !relocation) {
744 xfs_iunlock(rip, XFS_ILOCK_EXCL);
745 return XFS_ERROR(EBUSY);
746 }
747
748 /*
749 * Release dquot that rootinode, rbmino and rsumino might be holding,
750 * flush and purge the quota inodes.
751 */
752 error = XFS_QM_UNMOUNT(mp);
753 if (error == EFSCORRUPTED)
754 goto fscorrupt_out2;
755
756 if (rbmip) {
757 VN_RELE(XFS_ITOV(rbmip));
758 VN_RELE(XFS_ITOV(rsumip));
759 }
760
761 xfs_iunlock(rip, XFS_ILOCK_EXCL);
762 return 0;
763
764 fscorrupt_out:
765 xfs_ifunlock(rip);
766
767 fscorrupt_out2:
768 xfs_iunlock(rip, XFS_ILOCK_EXCL);
769
770 return XFS_ERROR(EFSCORRUPTED);
771 }
772
773 /*
774 * xfs_root extracts the root vnode from a vfs.
775 *
776 * vfsp -- the vfs struct for the desired file system
777 * vpp -- address of the caller's vnode pointer which should be
778 * set to the desired fs root vnode
779 */
780 STATIC int
781 xfs_root(
782 bhv_desc_t *bdp,
783 vnode_t **vpp)
784 {
785 vnode_t *vp;
786
787 vp = XFS_ITOV((XFS_BHVTOM(bdp))->m_rootip);
788 VN_HOLD(vp);
789 *vpp = vp;
790 return 0;
791 }
792
793 /*
794 * xfs_statvfs
795 *
796 * Fill in the statvfs structure for the given file system. We use
797 * the superblock lock in the mount structure to ensure a consistent
798 * snapshot of the counters returned.
799 */
800 STATIC int
801 xfs_statvfs(
802 bhv_desc_t *bdp,
803 xfs_statfs_t *statp,
804 vnode_t *vp)
805 {
806 __uint64_t fakeinos;
807 xfs_extlen_t lsize;
808 xfs_mount_t *mp;
809 xfs_sb_t *sbp;
810 unsigned long s;
811
812 mp = XFS_BHVTOM(bdp);
813 sbp = &(mp->m_sb);
814
815 statp->f_type = XFS_SB_MAGIC;
816
817 s = XFS_SB_LOCK(mp);
818 statp->f_bsize = sbp->sb_blocksize;
819 lsize = sbp->sb_logstart ? sbp->sb_logblocks : 0;
820 statp->f_blocks = sbp->sb_dblocks - lsize;
821 statp->f_bfree = statp->f_bavail = sbp->sb_fdblocks;
822 fakeinos = statp->f_bfree << sbp->sb_inopblog;
823 #if XFS_BIG_INUMS
824 fakeinos += mp->m_inoadd;
825 #endif
826 statp->f_files =
827 MIN(sbp->sb_icount + fakeinos, (__uint64_t)XFS_MAXINUMBER);
828 if (mp->m_maxicount)
829 #if XFS_BIG_INUMS
830 if (!mp->m_inoadd)
831 #endif
832 statp->f_files = min_t(typeof(statp->f_files),
833 statp->f_files,
834 mp->m_maxicount);
835 statp->f_ffree = statp->f_files - (sbp->sb_icount - sbp->sb_ifree);
836 XFS_SB_UNLOCK(mp, s);
837
838 xfs_statvfs_fsid(statp, mp);
839 statp->f_namelen = MAXNAMELEN - 1;
840
841 return 0;
842 }
843
844
845 /*
846 * xfs_sync flushes any pending I/O to file system vfsp.
847 *
848 * This routine is called by vfs_sync() to make sure that things make it
849 * out to disk eventually, on sync() system calls to flush out everything,
850 * and when the file system is unmounted. For the vfs_sync() case, all
851 * we really need to do is sync out the log to make all of our meta-data
852 * updates permanent (except for timestamps). For calls from pflushd(),
853 * dirty pages are kept moving by calling pdflush() on the inodes
854 * containing them. We also flush the inodes that we can lock without
855 * sleeping and the superblock if we can lock it without sleeping from
856 * vfs_sync() so that items at the tail of the log are always moving out.
857 *
858 * Flags:
859 * SYNC_BDFLUSH - We're being called from vfs_sync() so we don't want
860 * to sleep if we can help it. All we really need
861 * to do is ensure that the log is synced at least
862 * periodically. We also push the inodes and
863 * superblock if we can lock them without sleeping
864 * and they are not pinned.
865 * SYNC_ATTR - We need to flush the inodes. If SYNC_BDFLUSH is not
866 * set, then we really want to lock each inode and flush
867 * it.
868 * SYNC_WAIT - All the flushes that take place in this call should
869 * be synchronous.
870 * SYNC_DELWRI - This tells us to push dirty pages associated with
871 * inodes. SYNC_WAIT and SYNC_BDFLUSH are used to
872 * determine if they should be flushed sync, async, or
873 * delwri.
874 * SYNC_CLOSE - This flag is passed when the system is being
875 * unmounted. We should sync and invalidate everthing.
876 * SYNC_FSDATA - This indicates that the caller would like to make
877 * sure the superblock is safe on disk. We can ensure
878 * this by simply makeing sure the log gets flushed
879 * if SYNC_BDFLUSH is set, and by actually writing it
880 * out otherwise.
881 *
882 */
883 /*ARGSUSED*/
884 STATIC int
885 xfs_sync(
886 bhv_desc_t *bdp,
887 int flags,
888 cred_t *credp)
889 {
890 xfs_mount_t *mp = XFS_BHVTOM(bdp);
891
892 if (unlikely(flags == SYNC_QUIESCE))
893 return xfs_quiesce_fs(mp);
894 else
895 return xfs_syncsub(mp, flags, 0, NULL);
896 }
897
898 /*
899 * xfs sync routine for internal use
900 *
901 * This routine supports all of the flags defined for the generic VFS_SYNC
902 * interface as explained above under xfs_sync. In the interests of not
903 * changing interfaces within the 6.5 family, additional internallly-
904 * required functions are specified within a separate xflags parameter,
905 * only available by calling this routine.
906 *
907 */
908 int
909 xfs_sync_inodes(
910 xfs_mount_t *mp,
911 int flags,
912 int xflags,
913 int *bypassed)
914 {
915 xfs_inode_t *ip = NULL;
916 xfs_inode_t *ip_next;
917 xfs_buf_t *bp;
918 vnode_t *vp = NULL;
919 int error;
920 int last_error;
921 uint64_t fflag;
922 uint lock_flags;
923 uint base_lock_flags;
924 boolean_t mount_locked;
925 boolean_t vnode_refed;
926 int preempt;
927 xfs_dinode_t *dip;
928 xfs_iptr_t *ipointer;
929 #ifdef DEBUG
930 boolean_t ipointer_in = B_FALSE;
931
932 #define IPOINTER_SET ipointer_in = B_TRUE
933 #define IPOINTER_CLR ipointer_in = B_FALSE
934 #else
935 #define IPOINTER_SET
936 #define IPOINTER_CLR
937 #endif
938
939
940 /* Insert a marker record into the inode list after inode ip. The list
941 * must be locked when this is called. After the call the list will no
942 * longer be locked.
943 */
944 #define IPOINTER_INSERT(ip, mp) { \
945 ASSERT(ipointer_in == B_FALSE); \
946 ipointer->ip_mnext = ip->i_mnext; \
947 ipointer->ip_mprev = ip; \
948 ip->i_mnext = (xfs_inode_t *)ipointer; \
949 ipointer->ip_mnext->i_mprev = (xfs_inode_t *)ipointer; \
950 preempt = 0; \
951 XFS_MOUNT_IUNLOCK(mp); \
952 mount_locked = B_FALSE; \
953 IPOINTER_SET; \
954 }
955
956 /* Remove the marker from the inode list. If the marker was the only item
957 * in the list then there are no remaining inodes and we should zero out
958 * the whole list. If we are the current head of the list then move the head
959 * past us.
960 */
961 #define IPOINTER_REMOVE(ip, mp) { \
962 ASSERT(ipointer_in == B_TRUE); \
963 if (ipointer->ip_mnext != (xfs_inode_t *)ipointer) { \
964 ip = ipointer->ip_mnext; \
965 ip->i_mprev = ipointer->ip_mprev; \
966 ipointer->ip_mprev->i_mnext = ip; \
967 if (mp->m_inodes == (xfs_inode_t *)ipointer) { \
968 mp->m_inodes = ip; \
969 } \
970 } else { \
971 ASSERT(mp->m_inodes == (xfs_inode_t *)ipointer); \
972 mp->m_inodes = NULL; \
973 ip = NULL; \
974 } \
975 IPOINTER_CLR; \
976 }
977
978 #define XFS_PREEMPT_MASK 0x7f
979
980 if (bypassed)
981 *bypassed = 0;
982 if (XFS_MTOVFS(mp)->vfs_flag & VFS_RDONLY)
983 return 0;
984 error = 0;
985 last_error = 0;
986 preempt = 0;
987
988 /* Allocate a reference marker */
989 ipointer = (xfs_iptr_t *)kmem_zalloc(sizeof(xfs_iptr_t), KM_SLEEP);
990
991 fflag = XFS_B_ASYNC; /* default is don't wait */
992 if (flags & (SYNC_BDFLUSH | SYNC_DELWRI))
993 fflag = XFS_B_DELWRI;
994 if (flags & SYNC_WAIT)
995 fflag = 0; /* synchronous overrides all */
996
997 base_lock_flags = XFS_ILOCK_SHARED;
998 if (flags & (SYNC_DELWRI | SYNC_CLOSE)) {
999 /*
1000 * We need the I/O lock if we're going to call any of
1001 * the flush/inval routines.
1002 */
1003 base_lock_flags |= XFS_IOLOCK_SHARED;
1004 }
1005
1006 XFS_MOUNT_ILOCK(mp);
1007
1008 ip = mp->m_inodes;
1009
1010 mount_locked = B_TRUE;
1011 vnode_refed = B_FALSE;
1012
1013 IPOINTER_CLR;
1014
1015 do {
1016 ASSERT(ipointer_in == B_FALSE);
1017 ASSERT(vnode_refed == B_FALSE);
1018
1019 lock_flags = base_lock_flags;
1020
1021 /*
1022 * There were no inodes in the list, just break out
1023 * of the loop.
1024 */
1025 if (ip == NULL) {
1026 break;
1027 }
1028
1029 /*
1030 * We found another sync thread marker - skip it
1031 */
1032 if (ip->i_mount == NULL) {
1033 ip = ip->i_mnext;
1034 continue;
1035 }
1036
1037 vp = XFS_ITOV_NULL(ip);
1038
1039 /*
1040 * If the vnode is gone then this is being torn down,
1041 * call reclaim if it is flushed, else let regular flush
1042 * code deal with it later in the loop.
1043 */
1044
1045 if (vp == NULL) {
1046 /* Skip ones already in reclaim */
1047 if (ip->i_flags & XFS_IRECLAIM) {
1048 ip = ip->i_mnext;
1049 continue;
1050 }
1051 if (xfs_ilock_nowait(ip, XFS_ILOCK_EXCL) == 0) {
1052 ip = ip->i_mnext;
1053 } else if ((xfs_ipincount(ip) == 0) &&
1054 xfs_iflock_nowait(ip)) {
1055 IPOINTER_INSERT(ip, mp);
1056
1057 xfs_finish_reclaim(ip, 1,
1058 XFS_IFLUSH_DELWRI_ELSE_ASYNC);
1059
1060 XFS_MOUNT_ILOCK(mp);
1061 mount_locked = B_TRUE;
1062 IPOINTER_REMOVE(ip, mp);
1063 } else {
1064 xfs_iunlock(ip, XFS_ILOCK_EXCL);
1065 ip = ip->i_mnext;
1066 }
1067 continue;
1068 }
1069
1070 if (VN_BAD(vp)) {
1071 ip = ip->i_mnext;
1072 continue;
1073 }
1074
1075 if (XFS_FORCED_SHUTDOWN(mp) && !(flags & SYNC_CLOSE)) {
1076 XFS_MOUNT_IUNLOCK(mp);
1077 kmem_free(ipointer, sizeof(xfs_iptr_t));
1078 return 0;
1079 }
1080
1081 /*
1082 * If this is just vfs_sync() or pflushd() calling
1083 * then we can skip inodes for which it looks like
1084 * there is nothing to do. Since we don't have the
1085 * inode locked this is racey, but these are periodic
1086 * calls so it doesn't matter. For the others we want
1087 * to know for sure, so we at least try to lock them.
1088 */
1089 if (flags & SYNC_BDFLUSH) {
1090 if (((ip->i_itemp == NULL) ||
1091 !(ip->i_itemp->ili_format.ilf_fields &
1092 XFS_ILOG_ALL)) &&
1093 (ip->i_update_core == 0)) {
1094 ip = ip->i_mnext;
1095 continue;
1096 }
1097 }
1098
1099 /*
1100 * Try to lock without sleeping. We're out of order with
1101 * the inode list lock here, so if we fail we need to drop
1102 * the mount lock and try again. If we're called from
1103 * bdflush() here, then don't bother.
1104 *
1105 * The inode lock here actually coordinates with the
1106 * almost spurious inode lock in xfs_ireclaim() to prevent
1107 * the vnode we handle here without a reference from
1108 * being freed while we reference it. If we lock the inode
1109 * while it's on the mount list here, then the spurious inode
1110 * lock in xfs_ireclaim() after the inode is pulled from
1111 * the mount list will sleep until we release it here.
1112 * This keeps the vnode from being freed while we reference
1113 * it.
1114 */
1115 if (xfs_ilock_nowait(ip, lock_flags) == 0) {
1116 if ((flags & SYNC_BDFLUSH) || (vp == NULL)) {
1117 ip = ip->i_mnext;
1118 continue;
1119 }
1120
1121 vp = vn_grab(vp);
1122 if (vp == NULL) {
1123 ip = ip->i_mnext;
1124 continue;
1125 }
1126
1127 IPOINTER_INSERT(ip, mp);
1128 xfs_ilock(ip, lock_flags);
1129
1130 ASSERT(vp == XFS_ITOV(ip));
1131 ASSERT(ip->i_mount == mp);
1132
1133 vnode_refed = B_TRUE;
1134 }
1135
1136 /* From here on in the loop we may have a marker record
1137 * in the inode list.
1138 */
1139
1140 if ((flags & SYNC_CLOSE) && (vp != NULL)) {
1141 /*
1142 * This is the shutdown case. We just need to
1143 * flush and invalidate all the pages associated
1144 * with the inode. Drop the inode lock since
1145 * we can't hold it across calls to the buffer
1146 * cache.
1147 *
1148 * We don't set the VREMAPPING bit in the vnode
1149 * here, because we don't hold the vnode lock
1150 * exclusively. It doesn't really matter, though,
1151 * because we only come here when we're shutting
1152 * down anyway.
1153 */
1154 xfs_iunlock(ip, XFS_ILOCK_SHARED);
1155
1156 if (XFS_FORCED_SHUTDOWN(mp)) {
1157 VOP_TOSS_PAGES(vp, 0, -1, FI_REMAPF);
1158 } else {
1159 VOP_FLUSHINVAL_PAGES(vp, 0, -1, FI_REMAPF);
1160 }
1161
1162 xfs_ilock(ip, XFS_ILOCK_SHARED);
1163
1164 } else if ((flags & SYNC_DELWRI) && (vp != NULL)) {
1165 if (VN_DIRTY(vp)) {
1166 /* We need to have dropped the lock here,
1167 * so insert a marker if we have not already
1168 * done so.
1169 */
1170 if (mount_locked) {
1171 IPOINTER_INSERT(ip, mp);
1172 }
1173
1174 /*
1175 * Drop the inode lock since we can't hold it
1176 * across calls to the buffer cache.
1177 */
1178 xfs_iunlock(ip, XFS_ILOCK_SHARED);
1179 VOP_FLUSH_PAGES(vp, (xfs_off_t)0, -1,
1180 fflag, FI_NONE, error);
1181 xfs_ilock(ip, XFS_ILOCK_SHARED);
1182 }
1183
1184 }
1185
1186 if (flags & SYNC_BDFLUSH) {
1187 if ((flags & SYNC_ATTR) &&
1188 ((ip->i_update_core) ||
1189 ((ip->i_itemp != NULL) &&
1190 (ip->i_itemp->ili_format.ilf_fields != 0)))) {
1191
1192 /* Insert marker and drop lock if not already
1193 * done.
1194 */
1195 if (mount_locked) {
1196 IPOINTER_INSERT(ip, mp);
1197 }
1198
1199 /*
1200 * We don't want the periodic flushing of the
1201 * inodes by vfs_sync() to interfere with
1202 * I/O to the file, especially read I/O
1203 * where it is only the access time stamp
1204 * that is being flushed out. To prevent
1205 * long periods where we have both inode
1206 * locks held shared here while reading the
1207 * inode's buffer in from disk, we drop the
1208 * inode lock while reading in the inode
1209 * buffer. We have to release the buffer
1210 * and reacquire the inode lock so that they
1211 * are acquired in the proper order (inode
1212 * locks first). The buffer will go at the
1213 * end of the lru chain, though, so we can
1214 * expect it to still be there when we go
1215 * for it again in xfs_iflush().
1216 */
1217 if ((xfs_ipincount(ip) == 0) &&
1218 xfs_iflock_nowait(ip)) {
1219
1220 xfs_ifunlock(ip);
1221 xfs_iunlock(ip, XFS_ILOCK_SHARED);
1222
1223 error = xfs_itobp(mp, NULL, ip,
1224 &dip, &bp, 0);
1225 if (!error) {
1226 xfs_buf_relse(bp);
1227 } else {
1228 /* Bailing out, remove the
1229 * marker and free it.
1230 */
1231 XFS_MOUNT_ILOCK(mp);
1232
1233 IPOINTER_REMOVE(ip, mp);
1234
1235 XFS_MOUNT_IUNLOCK(mp);
1236
1237 ASSERT(!(lock_flags &
1238 XFS_IOLOCK_SHARED));
1239
1240 kmem_free(ipointer,
1241 sizeof(xfs_iptr_t));
1242 return (0);
1243 }
1244
1245 /*
1246 * Since we dropped the inode lock,
1247 * the inode may have been reclaimed.
1248 * Therefore, we reacquire the mount
1249 * lock and check to see if we were the
1250 * inode reclaimed. If this happened
1251 * then the ipointer marker will no
1252 * longer point back at us. In this
1253 * case, move ip along to the inode
1254 * after the marker, remove the marker
1255 * and continue.
1256 */
1257 XFS_MOUNT_ILOCK(mp);
1258 mount_locked = B_TRUE;
1259
1260 if (ip != ipointer->ip_mprev) {
1261 IPOINTER_REMOVE(ip, mp);
1262
1263 ASSERT(!vnode_refed);
1264 ASSERT(!(lock_flags &
1265 XFS_IOLOCK_SHARED));
1266 continue;
1267 }
1268
1269 ASSERT(ip->i_mount == mp);
1270
1271 if (xfs_ilock_nowait(ip,
1272 XFS_ILOCK_SHARED) == 0) {
1273 ASSERT(ip->i_mount == mp);
1274 /*
1275 * We failed to reacquire
1276 * the inode lock without
1277 * sleeping, so just skip
1278 * the inode for now. We
1279 * clear the ILOCK bit from
1280 * the lock_flags so that we
1281 * won't try to drop a lock
1282 * we don't hold below.
1283 */
1284 lock_flags &= ~XFS_ILOCK_SHARED;
1285 IPOINTER_REMOVE(ip_next, mp);
1286 } else if ((xfs_ipincount(ip) == 0) &&
1287 xfs_iflock_nowait(ip)) {
1288 ASSERT(ip->i_mount == mp);
1289 /*
1290 * Since this is vfs_sync()
1291 * calling we only flush the
1292 * inode out if we can lock
1293 * it without sleeping and
1294 * it is not pinned. Drop
1295 * the mount lock here so
1296 * that we don't hold it for
1297 * too long. We already have
1298 * a marker in the list here.
1299 */
1300 XFS_MOUNT_IUNLOCK(mp);
1301 mount_locked = B_FALSE;
1302 error = xfs_iflush(ip,
1303 XFS_IFLUSH_DELWRI);
1304 } else {
1305 ASSERT(ip->i_mount == mp);
1306 IPOINTER_REMOVE(ip_next, mp);
1307 }
1308 }
1309
1310 }
1311
1312 } else {
1313 if ((flags & SYNC_ATTR) &&
1314 ((ip->i_update_core) ||
1315 ((ip->i_itemp != NULL) &&
1316 (ip->i_itemp->ili_format.ilf_fields != 0)))) {
1317 if (mount_locked) {
1318 IPOINTER_INSERT(ip, mp);
1319 }
1320
1321 if (flags & SYNC_WAIT) {
1322 xfs_iflock(ip);
1323 error = xfs_iflush(ip,
1324 XFS_IFLUSH_SYNC);
1325 } else {
1326 /*
1327 * If we can't acquire the flush
1328 * lock, then the inode is already
1329 * being flushed so don't bother
1330 * waiting. If we can lock it then
1331 * do a delwri flush so we can
1332 * combine multiple inode flushes
1333 * in each disk write.
1334 */
1335 if (xfs_iflock_nowait(ip)) {
1336 error = xfs_iflush(ip,
1337 XFS_IFLUSH_DELWRI);
1338 }
1339 else if (bypassed)
1340 (*bypassed)++;
1341 }
1342 }
1343 }
1344
1345 if (lock_flags != 0) {
1346 xfs_iunlock(ip, lock_flags);
1347 }
1348
1349 if (vnode_refed) {
1350 /*
1351 * If we had to take a reference on the vnode
1352 * above, then wait until after we've unlocked
1353 * the inode to release the reference. This is
1354 * because we can be already holding the inode
1355 * lock when VN_RELE() calls xfs_inactive().
1356 *
1357 * Make sure to drop the mount lock before calling
1358 * VN_RELE() so that we don't trip over ourselves if
1359 * we have to go for the mount lock again in the
1360 * inactive code.
1361 */
1362 if (mount_locked) {
1363 IPOINTER_INSERT(ip, mp);
1364 }
1365
1366 VN_RELE(vp);
1367
1368 vnode_refed = B_FALSE;
1369 }
1370
1371 if (error) {
1372 last_error = error;
1373 }
1374
1375 /*
1376 * bail out if the filesystem is corrupted.
1377 */
1378 if (error == EFSCORRUPTED) {
1379 if (!mount_locked) {
1380 XFS_MOUNT_ILOCK(mp);
1381 IPOINTER_REMOVE(ip, mp);
1382 }
1383 XFS_MOUNT_IUNLOCK(mp);
1384 ASSERT(ipointer_in == B_FALSE);
1385 kmem_free(ipointer, sizeof(xfs_iptr_t));
1386 return XFS_ERROR(error);
1387 }
1388
1389 /* Let other threads have a chance at the mount lock
1390 * if we have looped many times without dropping the
1391 * lock.
1392 */
1393 if ((++preempt & XFS_PREEMPT_MASK) == 0) {
1394 if (mount_locked) {
1395 IPOINTER_INSERT(ip, mp);
1396 }
1397 }
1398
1399 if (mount_locked == B_FALSE) {
1400 XFS_MOUNT_ILOCK(mp);
1401 mount_locked = B_TRUE;
1402 IPOINTER_REMOVE(ip, mp);
1403 continue;
1404 }
1405
1406 ASSERT(ipointer_in == B_FALSE);
1407 ip = ip->i_mnext;
1408
1409 } while (ip != mp->m_inodes);
1410
1411 XFS_MOUNT_IUNLOCK(mp);
1412
1413 ASSERT(ipointer_in == B_FALSE);
1414
1415 kmem_free(ipointer, sizeof(xfs_iptr_t));
1416 return XFS_ERROR(last_error);
1417 }
1418
1419 /*
1420 * xfs sync routine for internal use
1421 *
1422 * This routine supports all of the flags defined for the generic VFS_SYNC
1423 * interface as explained above under xfs_sync. In the interests of not
1424 * changing interfaces within the 6.5 family, additional internallly-
1425 * required functions are specified within a separate xflags parameter,
1426 * only available by calling this routine.
1427 *
1428 */
1429 int
1430 xfs_syncsub(
1431 xfs_mount_t *mp,
1432 int flags,
1433 int xflags,
1434 int *bypassed)
1435 {
1436 int error = 0;
1437 int last_error = 0;
1438 uint log_flags = XFS_LOG_FORCE;
1439 xfs_buf_t *bp;
1440 xfs_buf_log_item_t *bip;
1441
1442 /*
1443 * Sync out the log. This ensures that the log is periodically
1444 * flushed even if there is not enough activity to fill it up.
1445 */
1446 if (flags & SYNC_WAIT)
1447 log_flags |= XFS_LOG_SYNC;
1448
1449 xfs_log_force(mp, (xfs_lsn_t)0, log_flags);
1450
1451 if (flags & (SYNC_ATTR|SYNC_DELWRI)) {
1452 if (flags & SYNC_BDFLUSH)
1453 xfs_finish_reclaim_all(mp, 1);
1454 else
1455 error = xfs_sync_inodes(mp, flags, xflags, bypassed);
1456 }
1457
1458 /*
1459 * Flushing out dirty data above probably generated more
1460 * log activity, so if this isn't vfs_sync() then flush
1461 * the log again.
1462 */
1463 if (flags & SYNC_DELWRI) {
1464 xfs_log_force(mp, (xfs_lsn_t)0, log_flags);
1465 }
1466
1467 if (flags & SYNC_FSDATA) {
1468 /*
1469 * If this is vfs_sync() then only sync the superblock
1470 * if we can lock it without sleeping and it is not pinned.
1471 */
1472 if (flags & SYNC_BDFLUSH) {
1473 bp = xfs_getsb(mp, XFS_BUF_TRYLOCK);
1474 if (bp != NULL) {
1475 bip = XFS_BUF_FSPRIVATE(bp,xfs_buf_log_item_t*);
1476 if ((bip != NULL) &&
1477 xfs_buf_item_dirty(bip)) {
1478 if (!(XFS_BUF_ISPINNED(bp))) {
1479 XFS_BUF_ASYNC(bp);
1480 error = xfs_bwrite(mp, bp);
1481 } else {
1482 xfs_buf_relse(bp);
1483 }
1484 } else {
1485 xfs_buf_relse(bp);
1486 }
1487 }
1488 } else {
1489 bp = xfs_getsb(mp, 0);
1490 /*
1491 * If the buffer is pinned then push on the log so
1492 * we won't get stuck waiting in the write for
1493 * someone, maybe ourselves, to flush the log.
1494 * Even though we just pushed the log above, we
1495 * did not have the superblock buffer locked at
1496 * that point so it can become pinned in between
1497 * there and here.
1498 */
1499 if (XFS_BUF_ISPINNED(bp))
1500 xfs_log_force(mp, (xfs_lsn_t)0, XFS_LOG_FORCE);
1501 if (flags & SYNC_WAIT)
1502 XFS_BUF_UNASYNC(bp);
1503 else
1504 XFS_BUF_ASYNC(bp);
1505 error = xfs_bwrite(mp, bp);
1506 }
1507 if (error) {
1508 last_error = error;
1509 }
1510 }
1511
1512 /*
1513 * If this is the periodic sync, then kick some entries out of
1514 * the reference cache. This ensures that idle entries are
1515 * eventually kicked out of the cache.
1516 */
1517 if (flags & SYNC_REFCACHE) {
1518 if (flags & SYNC_WAIT)
1519 xfs_refcache_purge_mp(mp);
1520 else
1521 xfs_refcache_purge_some(mp);
1522 }
1523
1524 /*
1525 * Now check to see if the log needs a "dummy" transaction.
1526 */
1527
1528 if (!(flags & SYNC_REMOUNT) && xfs_log_need_covered(mp)) {
1529 xfs_trans_t *tp;
1530 xfs_inode_t *ip;
1531
1532 /*
1533 * Put a dummy transaction in the log to tell
1534 * recovery that all others are OK.
1535 */
1536 tp = xfs_trans_alloc(mp, XFS_TRANS_DUMMY1);
1537 if ((error = xfs_trans_reserve(tp, 0,
1538 XFS_ICHANGE_LOG_RES(mp),
1539 0, 0, 0))) {
1540 xfs_trans_cancel(tp, 0);
1541 return error;
1542 }
1543
1544 ip = mp->m_rootip;
1545 xfs_ilock(ip, XFS_ILOCK_EXCL);
1546
1547 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
1548 xfs_trans_ihold(tp, ip);
1549 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1550 error = xfs_trans_commit(tp, 0, NULL);
1551 xfs_iunlock(ip, XFS_ILOCK_EXCL);
1552 xfs_log_force(mp, (xfs_lsn_t)0, log_flags);
1553 }
1554
1555 /*
1556 * When shutting down, we need to insure that the AIL is pushed
1557 * to disk or the filesystem can appear corrupt from the PROM.
1558 */
1559 if ((flags & (SYNC_CLOSE|SYNC_WAIT)) == (SYNC_CLOSE|SYNC_WAIT)) {
1560 XFS_bflush(mp->m_ddev_targp);
1561 if (mp->m_rtdev_targp) {
1562 XFS_bflush(mp->m_rtdev_targp);
1563 }
1564 }
1565
1566 return XFS_ERROR(last_error);
1567 }
1568
1569 /*
1570 * xfs_vget - called by DMAPI and NFSD to get vnode from file handle
1571 */
1572 STATIC int
1573 xfs_vget(
1574 bhv_desc_t *bdp,
1575 vnode_t **vpp,
1576 fid_t *fidp)
1577 {
1578 xfs_mount_t *mp = XFS_BHVTOM(bdp);
1579 xfs_fid_t *xfid = (struct xfs_fid *)fidp;
1580 xfs_inode_t *ip;
1581 int error;
1582 xfs_ino_t ino;
1583 unsigned int igen;
1584
1585 /*
1586 * Invalid. Since handles can be created in user space and passed in
1587 * via gethandle(), this is not cause for a panic.
1588 */
1589 if (xfid->xfs_fid_len != sizeof(*xfid) - sizeof(xfid->xfs_fid_len))
1590 return XFS_ERROR(EINVAL);
1591
1592 ino = xfid->xfs_fid_ino;
1593 igen = xfid->xfs_fid_gen;
1594
1595 /*
1596 * NFS can sometimes send requests for ino 0. Fail them gracefully.
1597 */
1598 if (ino == 0)
1599 return XFS_ERROR(ESTALE);
1600
1601 error = xfs_iget(mp, NULL, ino, 0, XFS_ILOCK_SHARED, &ip, 0);
1602 if (error) {
1603 *vpp = NULL;
1604 return error;
1605 }
1606
1607 if (ip == NULL) {
1608 *vpp = NULL;
1609 return XFS_ERROR(EIO);
1610 }
1611
1612 if (ip->i_d.di_mode == 0 || ip->i_d.di_gen != igen) {
1613 xfs_iput_new(ip, XFS_ILOCK_SHARED);
1614 *vpp = NULL;
1615 return XFS_ERROR(ENOENT);
1616 }
1617
1618 *vpp = XFS_ITOV(ip);
1619 xfs_iunlock(ip, XFS_ILOCK_SHARED);
1620 return 0;
1621 }
1622
1623
1624 #define MNTOPT_LOGBUFS "logbufs" /* number of XFS log buffers */
1625 #define MNTOPT_LOGBSIZE "logbsize" /* size of XFS log buffers */
1626 #define MNTOPT_LOGDEV "logdev" /* log device */
1627 #define MNTOPT_RTDEV "rtdev" /* realtime I/O device */
1628 #define MNTOPT_BIOSIZE "biosize" /* log2 of preferred buffered io size */
1629 #define MNTOPT_WSYNC "wsync" /* safe-mode nfs compatible mount */
1630 #define MNTOPT_INO64 "ino64" /* force inodes into 64-bit range */
1631 #define MNTOPT_NOALIGN "noalign" /* turn off stripe alignment */
1632 #define MNTOPT_SWALLOC "swalloc" /* turn on stripe width allocation */
1633 #define MNTOPT_SUNIT "sunit" /* data volume stripe unit */
1634 #define MNTOPT_SWIDTH "swidth" /* data volume stripe width */
1635 #define MNTOPT_NOUUID "nouuid" /* ignore filesystem UUID */
1636 #define MNTOPT_MTPT "mtpt" /* filesystem mount point */
1637 #define MNTOPT_GRPID "grpid" /* group-ID from parent directory */
1638 #define MNTOPT_NOGRPID "nogrpid" /* group-ID from current process */
1639 #define MNTOPT_BSDGROUPS "bsdgroups" /* group-ID from parent directory */
1640 #define MNTOPT_SYSVGROUPS "sysvgroups" /* group-ID from current process */
1641 #define MNTOPT_ALLOCSIZE "allocsize" /* preferred allocation size */
1642 #define MNTOPT_IHASHSIZE "ihashsize" /* size of inode hash table */
1643 #define MNTOPT_NORECOVERY "norecovery" /* don't run XFS recovery */
1644 #define MNTOPT_BARRIER "barrier" /* use writer barriers for log write and
1645 * unwritten extent conversion */
1646 #define MNTOPT_NOBARRIER "nobarrier" /* .. disable */
1647 #define MNTOPT_OSYNCISOSYNC "osyncisosync" /* o_sync is REALLY o_sync */
1648 #define MNTOPT_64BITINODE "inode64" /* inodes can be allocated anywhere */
1649 #define MNTOPT_IKEEP "ikeep" /* do not free empty inode clusters */
1650 #define MNTOPT_NOIKEEP "noikeep" /* free empty inode clusters */
1651 #define MNTOPT_LARGEIO "largeio" /* report large I/O sizes in stat() */
1652 #define MNTOPT_NOLARGEIO "nolargeio" /* do not report large I/O sizes
1653 * in stat(). */
1654 #define MNTOPT_ATTR2 "attr2" /* do use attr2 attribute format */
1655 #define MNTOPT_NOATTR2 "noattr2" /* do not use attr2 attribute format */
1656
1657 STATIC unsigned long
1658 suffix_strtoul(const char *cp, char **endp, unsigned int base)
1659 {
1660 int last, shift_left_factor = 0;
1661 char *value = (char *)cp;
1662
1663 last = strlen(value) - 1;
1664 if (value[last] == 'K' || value[last] == 'k') {
1665 shift_left_factor = 10;
1666 value[last] = '\0';
1667 }
1668 if (value[last] == 'M' || value[last] == 'm') {
1669 shift_left_factor = 20;
1670 value[last] = '\0';
1671 }
1672 if (value[last] == 'G' || value[last] == 'g') {
1673 shift_left_factor = 30;
1674 value[last] = '\0';
1675 }
1676
1677 return simple_strtoul(cp, endp, base) << shift_left_factor;
1678 }
1679
1680 STATIC int
1681 xfs_parseargs(
1682 struct bhv_desc *bhv,
1683 char *options,
1684 struct xfs_mount_args *args,
1685 int update)
1686 {
1687 struct vfs *vfsp = bhvtovfs(bhv);
1688 char *this_char, *value, *eov;
1689 int dsunit, dswidth, vol_dsunit, vol_dswidth;
1690 int iosize;
1691
1692 args->flags2 |= XFSMNT2_COMPAT_IOSIZE;
1693
1694 #if 0 /* XXX: off by default, until some remaining issues ironed out */
1695 args->flags |= XFSMNT_IDELETE; /* default to on */
1696 #endif
1697
1698 if (!options)
1699 goto done;
1700
1701 iosize = dsunit = dswidth = vol_dsunit = vol_dswidth = 0;
1702
1703 while ((this_char = strsep(&options, ",")) != NULL) {
1704 if (!*this_char)
1705 continue;
1706 if ((value = strchr(this_char, '=')) != NULL)
1707 *value++ = 0;
1708
1709 if (!strcmp(this_char, MNTOPT_LOGBUFS)) {
1710 if (!value || !*value) {
1711 printk("XFS: %s option requires an argument\n",
1712 this_char);
1713 return EINVAL;
1714 }
1715 args->logbufs = simple_strtoul(value, &eov, 10);
1716 } else if (!strcmp(this_char, MNTOPT_LOGBSIZE)) {
1717 if (!value || !*value) {
1718 printk("XFS: %s option requires an argument\n",
1719 this_char);
1720 return EINVAL;
1721 }
1722 args->logbufsize = suffix_strtoul(value, &eov, 10);
1723 } else if (!strcmp(this_char, MNTOPT_LOGDEV)) {
1724 if (!value || !*value) {
1725 printk("XFS: %s option requires an argument\n",
1726 this_char);
1727 return EINVAL;
1728 }
1729 strncpy(args->logname, value, MAXNAMELEN);
1730 } else if (!strcmp(this_char, MNTOPT_MTPT)) {
1731 if (!value || !*value) {
1732 printk("XFS: %s option requires an argument\n",
1733 this_char);
1734 return EINVAL;
1735 }
1736 strncpy(args->mtpt, value, MAXNAMELEN);
1737 } else if (!strcmp(this_char, MNTOPT_RTDEV)) {
1738 if (!value || !*value) {
1739 printk("XFS: %s option requires an argument\n",
1740 this_char);
1741 return EINVAL;
1742 }
1743 strncpy(args->rtname, value, MAXNAMELEN);
1744 } else if (!strcmp(this_char, MNTOPT_BIOSIZE)) {
1745 if (!value || !*value) {
1746 printk("XFS: %s option requires an argument\n",
1747 this_char);
1748 return EINVAL;
1749 }
1750 iosize = simple_strtoul(value, &eov, 10);
1751 args->flags |= XFSMNT_IOSIZE;
1752 args->iosizelog = (uint8_t) iosize;
1753 } else if (!strcmp(this_char, MNTOPT_ALLOCSIZE)) {
1754 if (!value || !*value) {
1755 printk("XFS: %s option requires an argument\n",
1756 this_char);
1757 return EINVAL;
1758 }
1759 iosize = suffix_strtoul(value, &eov, 10);
1760 args->flags |= XFSMNT_IOSIZE;
1761 args->iosizelog = ffs(iosize) - 1;
1762 } else if (!strcmp(this_char, MNTOPT_IHASHSIZE)) {
1763 if (!value || !*value) {
1764 printk("XFS: %s option requires an argument\n",
1765 this_char);
1766 return EINVAL;
1767 }
1768 args->flags |= XFSMNT_IHASHSIZE;
1769 args->ihashsize = simple_strtoul(value, &eov, 10);
1770 } else if (!strcmp(this_char, MNTOPT_GRPID) ||
1771 !strcmp(this_char, MNTOPT_BSDGROUPS)) {
1772 vfsp->vfs_flag |= VFS_GRPID;
1773 } else if (!strcmp(this_char, MNTOPT_NOGRPID) ||
1774 !strcmp(this_char, MNTOPT_SYSVGROUPS)) {
1775 vfsp->vfs_flag &= ~VFS_GRPID;
1776 } else if (!strcmp(this_char, MNTOPT_WSYNC)) {
1777 args->flags |= XFSMNT_WSYNC;
1778 } else if (!strcmp(this_char, MNTOPT_OSYNCISOSYNC)) {
1779 args->flags |= XFSMNT_OSYNCISOSYNC;
1780 } else if (!strcmp(this_char, MNTOPT_NORECOVERY)) {
1781 args->flags |= XFSMNT_NORECOVERY;
1782 } else if (!strcmp(this_char, MNTOPT_INO64)) {
1783 args->flags |= XFSMNT_INO64;
1784 #if !XFS_BIG_INUMS
1785 printk("XFS: %s option not allowed on this system\n",
1786 this_char);
1787 return EINVAL;
1788 #endif
1789 } else if (!strcmp(this_char, MNTOPT_NOALIGN)) {
1790 args->flags |= XFSMNT_NOALIGN;
1791 } else if (!strcmp(this_char, MNTOPT_SWALLOC)) {
1792 args->flags |= XFSMNT_SWALLOC;
1793 } else if (!strcmp(this_char, MNTOPT_SUNIT)) {
1794 if (!value || !*value) {
1795 printk("XFS: %s option requires an argument\n",
1796 this_char);
1797 return EINVAL;
1798 }
1799 dsunit = simple_strtoul(value, &eov, 10);
1800 } else if (!strcmp(this_char, MNTOPT_SWIDTH)) {
1801 if (!value || !*value) {
1802 printk("XFS: %s option requires an argument\n",
1803 this_char);
1804 return EINVAL;
1805 }
1806 dswidth = simple_strtoul(value, &eov, 10);
1807 } else if (!strcmp(this_char, MNTOPT_64BITINODE)) {
1808 args->flags &= ~XFSMNT_32BITINODES;
1809 #if !XFS_BIG_INUMS
1810 printk("XFS: %s option not allowed on this system\n",
1811 this_char);
1812 return EINVAL;
1813 #endif
1814 } else if (!strcmp(this_char, MNTOPT_NOUUID)) {
1815 args->flags |= XFSMNT_NOUUID;
1816 } else if (!strcmp(this_char, MNTOPT_BARRIER)) {
1817 args->flags |= XFSMNT_BARRIER;
1818 } else if (!strcmp(this_char, MNTOPT_NOBARRIER)) {
1819 args->flags &= ~XFSMNT_BARRIER;
1820 } else if (!strcmp(this_char, MNTOPT_IKEEP)) {
1821 args->flags &= ~XFSMNT_IDELETE;
1822 } else if (!strcmp(this_char, MNTOPT_NOIKEEP)) {
1823 args->flags |= XFSMNT_IDELETE;
1824 } else if (!strcmp(this_char, MNTOPT_LARGEIO)) {
1825 args->flags2 &= ~XFSMNT2_COMPAT_IOSIZE;
1826 } else if (!strcmp(this_char, MNTOPT_NOLARGEIO)) {
1827 args->flags2 |= XFSMNT2_COMPAT_IOSIZE;
1828 } else if (!strcmp(this_char, MNTOPT_ATTR2)) {
1829 args->flags |= XFSMNT_ATTR2;
1830 } else if (!strcmp(this_char, MNTOPT_NOATTR2)) {
1831 args->flags &= ~XFSMNT_ATTR2;
1832 } else if (!strcmp(this_char, "osyncisdsync")) {
1833 /* no-op, this is now the default */
1834 printk("XFS: osyncisdsync is now the default, option is deprecated.\n");
1835 } else if (!strcmp(this_char, "irixsgid")) {
1836 printk("XFS: irixsgid is now a sysctl(2) variable, option is deprecated.\n");
1837 } else {
1838 printk("XFS: unknown mount option [%s].\n", this_char);
1839 return EINVAL;
1840 }
1841 }
1842
1843 if (args->flags & XFSMNT_NORECOVERY) {
1844 if ((vfsp->vfs_flag & VFS_RDONLY) == 0) {
1845 printk("XFS: no-recovery mounts must be read-only.\n");
1846 return EINVAL;
1847 }
1848 }
1849
1850 if ((args->flags & XFSMNT_NOALIGN) && (dsunit || dswidth)) {
1851 printk(
1852 "XFS: sunit and swidth options incompatible with the noalign option\n");
1853 return EINVAL;
1854 }
1855
1856 if ((dsunit && !dswidth) || (!dsunit && dswidth)) {
1857 printk("XFS: sunit and swidth must be specified together\n");
1858 return EINVAL;
1859 }
1860
1861 if (dsunit && (dswidth % dsunit != 0)) {
1862 printk(
1863 "XFS: stripe width (%d) must be a multiple of the stripe unit (%d)\n",
1864 dswidth, dsunit);
1865 return EINVAL;
1866 }
1867
1868 if ((args->flags & XFSMNT_NOALIGN) != XFSMNT_NOALIGN) {
1869 if (dsunit) {
1870 args->sunit = dsunit;
1871 args->flags |= XFSMNT_RETERR;
1872 } else {
1873 args->sunit = vol_dsunit;
1874 }
1875 dswidth ? (args->swidth = dswidth) :
1876 (args->swidth = vol_dswidth);
1877 } else {
1878 args->sunit = args->swidth = 0;
1879 }
1880
1881 done:
1882 if (args->flags & XFSMNT_32BITINODES)
1883 vfsp->vfs_flag |= VFS_32BITINODES;
1884 if (args->flags2)
1885 args->flags |= XFSMNT_FLAGS2;
1886 return 0;
1887 }
1888
1889 STATIC int
1890 xfs_showargs(
1891 struct bhv_desc *bhv,
1892 struct seq_file *m)
1893 {
1894 static struct proc_xfs_info {
1895 int flag;
1896 char *str;
1897 } xfs_info[] = {
1898 /* the few simple ones we can get from the mount struct */
1899 { XFS_MOUNT_WSYNC, "," MNTOPT_WSYNC },
1900 { XFS_MOUNT_INO64, "," MNTOPT_INO64 },
1901 { XFS_MOUNT_NOALIGN, "," MNTOPT_NOALIGN },
1902 { XFS_MOUNT_SWALLOC, "," MNTOPT_SWALLOC },
1903 { XFS_MOUNT_NOUUID, "," MNTOPT_NOUUID },
1904 { XFS_MOUNT_NORECOVERY, "," MNTOPT_NORECOVERY },
1905 { XFS_MOUNT_OSYNCISOSYNC, "," MNTOPT_OSYNCISOSYNC },
1906 { XFS_MOUNT_IDELETE, "," MNTOPT_NOIKEEP },
1907 { 0, NULL }
1908 };
1909 struct proc_xfs_info *xfs_infop;
1910 struct xfs_mount *mp = XFS_BHVTOM(bhv);
1911 struct vfs *vfsp = XFS_MTOVFS(mp);
1912
1913 for (xfs_infop = xfs_info; xfs_infop->flag; xfs_infop++) {
1914 if (mp->m_flags & xfs_infop->flag)
1915 seq_puts(m, xfs_infop->str);
1916 }
1917
1918 if (mp->m_flags & XFS_MOUNT_IHASHSIZE)
1919 seq_printf(m, "," MNTOPT_IHASHSIZE "=%d", mp->m_ihsize);
1920
1921 if (mp->m_flags & XFS_MOUNT_DFLT_IOSIZE)
1922 seq_printf(m, "," MNTOPT_ALLOCSIZE "=%dk",
1923 (int)(1 << mp->m_writeio_log) >> 10);
1924
1925 if (mp->m_logbufs > 0)
1926 seq_printf(m, "," MNTOPT_LOGBUFS "=%d", mp->m_logbufs);
1927 if (mp->m_logbsize > 0)
1928 seq_printf(m, "," MNTOPT_LOGBSIZE "=%dk", mp->m_logbsize >> 10);
1929
1930 if (mp->m_logname)
1931 seq_printf(m, "," MNTOPT_LOGDEV "=%s", mp->m_logname);
1932 if (mp->m_rtname)
1933 seq_printf(m, "," MNTOPT_RTDEV "=%s", mp->m_rtname);
1934
1935 if (mp->m_dalign > 0)
1936 seq_printf(m, "," MNTOPT_SUNIT "=%d",
1937 (int)XFS_FSB_TO_BB(mp, mp->m_dalign));
1938 if (mp->m_swidth > 0)
1939 seq_printf(m, "," MNTOPT_SWIDTH "=%d",
1940 (int)XFS_FSB_TO_BB(mp, mp->m_swidth));
1941
1942 if (!(mp->m_flags & XFS_MOUNT_COMPAT_IOSIZE))
1943 seq_printf(m, "," MNTOPT_LARGEIO);
1944 if (mp->m_flags & XFS_MOUNT_BARRIER)
1945 seq_printf(m, "," MNTOPT_BARRIER);
1946
1947 if (!(vfsp->vfs_flag & VFS_32BITINODES))
1948 seq_printf(m, "," MNTOPT_64BITINODE);
1949 if (vfsp->vfs_flag & VFS_GRPID)
1950 seq_printf(m, "," MNTOPT_GRPID);
1951
1952 return 0;
1953 }
1954
1955 STATIC void
1956 xfs_freeze(
1957 bhv_desc_t *bdp)
1958 {
1959 xfs_mount_t *mp = XFS_BHVTOM(bdp);
1960
1961 while (atomic_read(&mp->m_active_trans) > 0)
1962 delay(100);
1963
1964 /* Push the superblock and write an unmount record */
1965 xfs_log_unmount_write(mp);
1966 xfs_unmountfs_writesb(mp);
1967 xfs_fs_log_dummy(mp);
1968 }
1969
1970
1971 vfsops_t xfs_vfsops = {
1972 BHV_IDENTITY_INIT(VFS_BHV_XFS,VFS_POSITION_XFS),
1973 .vfs_parseargs = xfs_parseargs,
1974 .vfs_showargs = xfs_showargs,
1975 .vfs_mount = xfs_mount,
1976 .vfs_unmount = xfs_unmount,
1977 .vfs_mntupdate = xfs_mntupdate,
1978 .vfs_root = xfs_root,
1979 .vfs_statvfs = xfs_statvfs,
1980 .vfs_sync = xfs_sync,
1981 .vfs_vget = xfs_vget,
1982 .vfs_dmapiops = (vfs_dmapiops_t)fs_nosys,
1983 .vfs_quotactl = (vfs_quotactl_t)fs_nosys,
1984 .vfs_init_vnode = xfs_initialize_vnode,
1985 .vfs_force_shutdown = xfs_do_force_shutdown,
1986 .vfs_freeze = xfs_freeze,
1987 };
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