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[PATCH] debugfs inode leak
[linux/fpc-iii.git] / fs / xfs / xfs_vfsops.c
blob36ea1b2094f29cf6c2a475fce994e8e15a4e0008
1 /*
2 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
3 * All Rights Reserved.
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
7 * published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it would be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write the Free Software Foundation,
16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
17 */
18 #include "xfs.h"
19 #include "xfs_fs.h"
20 #include "xfs_types.h"
21 #include "xfs_bit.h"
22 #include "xfs_log.h"
23 #include "xfs_inum.h"
24 #include "xfs_trans.h"
25 #include "xfs_sb.h"
26 #include "xfs_ag.h"
27 #include "xfs_dir.h"
28 #include "xfs_dir2.h"
29 #include "xfs_dmapi.h"
30 #include "xfs_mount.h"
31 #include "xfs_da_btree.h"
32 #include "xfs_bmap_btree.h"
33 #include "xfs_ialloc_btree.h"
34 #include "xfs_alloc_btree.h"
35 #include "xfs_dir_sf.h"
36 #include "xfs_dir2_sf.h"
37 #include "xfs_attr_sf.h"
38 #include "xfs_dinode.h"
39 #include "xfs_inode.h"
40 #include "xfs_inode_item.h"
41 #include "xfs_btree.h"
42 #include "xfs_alloc.h"
43 #include "xfs_ialloc.h"
44 #include "xfs_quota.h"
45 #include "xfs_error.h"
46 #include "xfs_bmap.h"
47 #include "xfs_rw.h"
48 #include "xfs_refcache.h"
49 #include "xfs_buf_item.h"
50 #include "xfs_log_priv.h"
51 #include "xfs_dir2_trace.h"
52 #include "xfs_extfree_item.h"
53 #include "xfs_acl.h"
54 #include "xfs_attr.h"
55 #include "xfs_clnt.h"
56 #include "xfs_fsops.h"
57
58 STATIC int xfs_sync(bhv_desc_t *, int, cred_t *);
59
60 int
61 xfs_init(void)
62 {
63 extern kmem_zone_t *xfs_bmap_free_item_zone;
64 extern kmem_zone_t *xfs_btree_cur_zone;
65 extern kmem_zone_t *xfs_trans_zone;
66 extern kmem_zone_t *xfs_buf_item_zone;
67 extern kmem_zone_t *xfs_dabuf_zone;
68 #ifdef XFS_DABUF_DEBUG
69 extern lock_t xfs_dabuf_global_lock;
70 spinlock_init(&xfs_dabuf_global_lock, "xfsda");
71 #endif
72
73 /*
74 * Initialize all of the zone allocators we use.
75 */
76 xfs_bmap_free_item_zone = kmem_zone_init(sizeof(xfs_bmap_free_item_t),
77 "xfs_bmap_free_item");
78 xfs_btree_cur_zone = kmem_zone_init(sizeof(xfs_btree_cur_t),
79 "xfs_btree_cur");
80 xfs_trans_zone = kmem_zone_init(sizeof(xfs_trans_t), "xfs_trans");
81 xfs_da_state_zone =
82 kmem_zone_init(sizeof(xfs_da_state_t), "xfs_da_state");
83 xfs_dabuf_zone = kmem_zone_init(sizeof(xfs_dabuf_t), "xfs_dabuf");
84 xfs_ifork_zone = kmem_zone_init(sizeof(xfs_ifork_t), "xfs_ifork");
85 xfs_acl_zone_init(xfs_acl_zone, "xfs_acl");
86
87 /*
88 * The size of the zone allocated buf log item is the maximum
89 * size possible under XFS. This wastes a little bit of memory,
90 * but it is much faster.
91 */
92 xfs_buf_item_zone =
93 kmem_zone_init((sizeof(xfs_buf_log_item_t) +
94 (((XFS_MAX_BLOCKSIZE / XFS_BLI_CHUNK) /
95 NBWORD) * sizeof(int))),
96 "xfs_buf_item");
97 xfs_efd_zone =
98 kmem_zone_init((sizeof(xfs_efd_log_item_t) +
99 ((XFS_EFD_MAX_FAST_EXTENTS - 1) *
100 sizeof(xfs_extent_t))),
101 "xfs_efd_item");
102 xfs_efi_zone =
103 kmem_zone_init((sizeof(xfs_efi_log_item_t) +
104 ((XFS_EFI_MAX_FAST_EXTENTS - 1) *
105 sizeof(xfs_extent_t))),
106 "xfs_efi_item");
107
108 /*
109 * These zones warrant special memory allocator hints
110 */
111 xfs_inode_zone =
112 kmem_zone_init_flags(sizeof(xfs_inode_t), "xfs_inode",
113 KM_ZONE_HWALIGN | KM_ZONE_RECLAIM |
114 KM_ZONE_SPREAD, NULL);
115 xfs_ili_zone =
116 kmem_zone_init_flags(sizeof(xfs_inode_log_item_t), "xfs_ili",
117 KM_ZONE_SPREAD, NULL);
118 xfs_chashlist_zone =
119 kmem_zone_init_flags(sizeof(xfs_chashlist_t), "xfs_chashlist",
120 KM_ZONE_SPREAD, NULL);
121
122 /*
123 * Allocate global trace buffers.
124 */
125 #ifdef XFS_ALLOC_TRACE
126 xfs_alloc_trace_buf = ktrace_alloc(XFS_ALLOC_TRACE_SIZE, KM_SLEEP);
127 #endif
128 #ifdef XFS_BMAP_TRACE
129 xfs_bmap_trace_buf = ktrace_alloc(XFS_BMAP_TRACE_SIZE, KM_SLEEP);
130 #endif
131 #ifdef XFS_BMBT_TRACE
132 xfs_bmbt_trace_buf = ktrace_alloc(XFS_BMBT_TRACE_SIZE, KM_SLEEP);
133 #endif
134 #ifdef XFS_DIR_TRACE
135 xfs_dir_trace_buf = ktrace_alloc(XFS_DIR_TRACE_SIZE, KM_SLEEP);
136 #endif
137 #ifdef XFS_ATTR_TRACE
138 xfs_attr_trace_buf = ktrace_alloc(XFS_ATTR_TRACE_SIZE, KM_SLEEP);
139 #endif
140 #ifdef XFS_DIR2_TRACE
141 xfs_dir2_trace_buf = ktrace_alloc(XFS_DIR2_GTRACE_SIZE, KM_SLEEP);
142 #endif
143
144 xfs_dir_startup();
145
146 #if (defined(DEBUG) || defined(INDUCE_IO_ERROR))
147 xfs_error_test_init();
148 #endif /* DEBUG || INDUCE_IO_ERROR */
149
150 xfs_init_procfs();
151 xfs_sysctl_register();
152 return 0;
153 }
154
155 void
156 xfs_cleanup(void)
157 {
158 extern kmem_zone_t *xfs_bmap_free_item_zone;
159 extern kmem_zone_t *xfs_btree_cur_zone;
160 extern kmem_zone_t *xfs_inode_zone;
161 extern kmem_zone_t *xfs_trans_zone;
162 extern kmem_zone_t *xfs_da_state_zone;
163 extern kmem_zone_t *xfs_dabuf_zone;
164 extern kmem_zone_t *xfs_efd_zone;
165 extern kmem_zone_t *xfs_efi_zone;
166 extern kmem_zone_t *xfs_buf_item_zone;
167 extern kmem_zone_t *xfs_chashlist_zone;
168
169 xfs_cleanup_procfs();
170 xfs_sysctl_unregister();
171 xfs_refcache_destroy();
172 xfs_acl_zone_destroy(xfs_acl_zone);
173
174 #ifdef XFS_DIR2_TRACE
175 ktrace_free(xfs_dir2_trace_buf);
176 #endif
177 #ifdef XFS_ATTR_TRACE
178 ktrace_free(xfs_attr_trace_buf);
179 #endif
180 #ifdef XFS_DIR_TRACE
181 ktrace_free(xfs_dir_trace_buf);
182 #endif
183 #ifdef XFS_BMBT_TRACE
184 ktrace_free(xfs_bmbt_trace_buf);
185 #endif
186 #ifdef XFS_BMAP_TRACE
187 ktrace_free(xfs_bmap_trace_buf);
188 #endif
189 #ifdef XFS_ALLOC_TRACE
190 ktrace_free(xfs_alloc_trace_buf);
191 #endif
192
193 kmem_zone_destroy(xfs_bmap_free_item_zone);
194 kmem_zone_destroy(xfs_btree_cur_zone);
195 kmem_zone_destroy(xfs_inode_zone);
196 kmem_zone_destroy(xfs_trans_zone);
197 kmem_zone_destroy(xfs_da_state_zone);
198 kmem_zone_destroy(xfs_dabuf_zone);
199 kmem_zone_destroy(xfs_buf_item_zone);
200 kmem_zone_destroy(xfs_efd_zone);
201 kmem_zone_destroy(xfs_efi_zone);
202 kmem_zone_destroy(xfs_ifork_zone);
203 kmem_zone_destroy(xfs_ili_zone);
204 kmem_zone_destroy(xfs_chashlist_zone);
205 }
206
207 /*
208 * xfs_start_flags
209 *
210 * This function fills in xfs_mount_t fields based on mount args.
211 * Note: the superblock has _not_ yet been read in.
212 */
213 STATIC int
214 xfs_start_flags(
215 struct vfs *vfs,
216 struct xfs_mount_args *ap,
217 struct xfs_mount *mp)
218 {
219 /* Values are in BBs */
220 if ((ap->flags & XFSMNT_NOALIGN) != XFSMNT_NOALIGN) {
221 /*
222 * At this point the superblock has not been read
223 * in, therefore we do not know the block size.
224 * Before the mount call ends we will convert
225 * these to FSBs.
226 */
227 mp->m_dalign = ap->sunit;
228 mp->m_swidth = ap->swidth;
229 }
230
231 if (ap->logbufs != -1 &&
232 ap->logbufs != 0 &&
233 (ap->logbufs < XLOG_MIN_ICLOGS ||
234 ap->logbufs > XLOG_MAX_ICLOGS)) {
235 cmn_err(CE_WARN,
236 "XFS: invalid logbufs value: %d [not %d-%d]",
237 ap->logbufs, XLOG_MIN_ICLOGS, XLOG_MAX_ICLOGS);
238 return XFS_ERROR(EINVAL);
239 }
240 mp->m_logbufs = ap->logbufs;
241 if (ap->logbufsize != -1 &&
242 ap->logbufsize != 0 &&
243 ap->logbufsize != 16 * 1024 &&
244 ap->logbufsize != 32 * 1024 &&
245 ap->logbufsize != 64 * 1024 &&
246 ap->logbufsize != 128 * 1024 &&
247 ap->logbufsize != 256 * 1024) {
248 cmn_err(CE_WARN,
249 "XFS: invalid logbufsize: %d [not 16k,32k,64k,128k or 256k]",
250 ap->logbufsize);
251 return XFS_ERROR(EINVAL);
252 }
253 mp->m_ihsize = ap->ihashsize;
254 mp->m_logbsize = ap->logbufsize;
255 mp->m_fsname_len = strlen(ap->fsname) + 1;
256 mp->m_fsname = kmem_alloc(mp->m_fsname_len, KM_SLEEP);
257 strcpy(mp->m_fsname, ap->fsname);
258 if (ap->rtname[0]) {
259 mp->m_rtname = kmem_alloc(strlen(ap->rtname) + 1, KM_SLEEP);
260 strcpy(mp->m_rtname, ap->rtname);
261 }
262 if (ap->logname[0]) {
263 mp->m_logname = kmem_alloc(strlen(ap->logname) + 1, KM_SLEEP);
264 strcpy(mp->m_logname, ap->logname);
265 }
266
267 if (ap->flags & XFSMNT_WSYNC)
268 mp->m_flags |= XFS_MOUNT_WSYNC;
269 #if XFS_BIG_INUMS
270 if (ap->flags & XFSMNT_INO64) {
271 mp->m_flags |= XFS_MOUNT_INO64;
272 mp->m_inoadd = XFS_INO64_OFFSET;
273 }
274 #endif
275 if (ap->flags & XFSMNT_RETERR)
276 mp->m_flags |= XFS_MOUNT_RETERR;
277 if (ap->flags & XFSMNT_NOALIGN)
278 mp->m_flags |= XFS_MOUNT_NOALIGN;
279 if (ap->flags & XFSMNT_SWALLOC)
280 mp->m_flags |= XFS_MOUNT_SWALLOC;
281 if (ap->flags & XFSMNT_OSYNCISOSYNC)
282 mp->m_flags |= XFS_MOUNT_OSYNCISOSYNC;
283 if (ap->flags & XFSMNT_32BITINODES)
284 mp->m_flags |= XFS_MOUNT_32BITINODES;
285
286 if (ap->flags & XFSMNT_IOSIZE) {
287 if (ap->iosizelog > XFS_MAX_IO_LOG ||
288 ap->iosizelog < XFS_MIN_IO_LOG) {
289 cmn_err(CE_WARN,
290 "XFS: invalid log iosize: %d [not %d-%d]",
291 ap->iosizelog, XFS_MIN_IO_LOG,
292 XFS_MAX_IO_LOG);
293 return XFS_ERROR(EINVAL);
294 }
295
296 mp->m_flags |= XFS_MOUNT_DFLT_IOSIZE;
297 mp->m_readio_log = mp->m_writeio_log = ap->iosizelog;
298 }
299
300 if (ap->flags & XFSMNT_IHASHSIZE)
301 mp->m_flags |= XFS_MOUNT_IHASHSIZE;
302 if (ap->flags & XFSMNT_IDELETE)
303 mp->m_flags |= XFS_MOUNT_IDELETE;
304 if (ap->flags & XFSMNT_DIRSYNC)
305 mp->m_flags |= XFS_MOUNT_DIRSYNC;
306 if (ap->flags & XFSMNT_ATTR2)
307 mp->m_flags |= XFS_MOUNT_ATTR2;
308
309 if (ap->flags2 & XFSMNT2_COMPAT_IOSIZE)
310 mp->m_flags |= XFS_MOUNT_COMPAT_IOSIZE;
311
312 /*
313 * no recovery flag requires a read-only mount
314 */
315 if (ap->flags & XFSMNT_NORECOVERY) {
316 if (!(vfs->vfs_flag & VFS_RDONLY)) {
317 cmn_err(CE_WARN,
318 "XFS: tried to mount a FS read-write without recovery!");
319 return XFS_ERROR(EINVAL);
320 }
321 mp->m_flags |= XFS_MOUNT_NORECOVERY;
322 }
323
324 if (ap->flags & XFSMNT_NOUUID)
325 mp->m_flags |= XFS_MOUNT_NOUUID;
326 if (ap->flags & XFSMNT_BARRIER)
327 mp->m_flags |= XFS_MOUNT_BARRIER;
328 else
329 mp->m_flags &= ~XFS_MOUNT_BARRIER;
330
331 return 0;
332 }
333
334 /*
335 * This function fills in xfs_mount_t fields based on mount args.
336 * Note: the superblock _has_ now been read in.
337 */
338 STATIC int
339 xfs_finish_flags(
340 struct vfs *vfs,
341 struct xfs_mount_args *ap,
342 struct xfs_mount *mp)
343 {
344 int ronly = (vfs->vfs_flag & VFS_RDONLY);
345
346 /* Fail a mount where the logbuf is smaller then the log stripe */
347 if (XFS_SB_VERSION_HASLOGV2(&mp->m_sb)) {
348 if ((ap->logbufsize <= 0) &&
349 (mp->m_sb.sb_logsunit > XLOG_BIG_RECORD_BSIZE)) {
350 mp->m_logbsize = mp->m_sb.sb_logsunit;
351 } else if (ap->logbufsize > 0 &&
352 ap->logbufsize < mp->m_sb.sb_logsunit) {
353 cmn_err(CE_WARN,
354 "XFS: logbuf size must be greater than or equal to log stripe size");
355 return XFS_ERROR(EINVAL);
356 }
357 } else {
358 /* Fail a mount if the logbuf is larger than 32K */
359 if (ap->logbufsize > XLOG_BIG_RECORD_BSIZE) {
360 cmn_err(CE_WARN,
361 "XFS: logbuf size for version 1 logs must be 16K or 32K");
362 return XFS_ERROR(EINVAL);
363 }
364 }
365
366 if (XFS_SB_VERSION_HASATTR2(&mp->m_sb)) {
367 mp->m_flags |= XFS_MOUNT_ATTR2;
368 }
369
370 /*
371 * prohibit r/w mounts of read-only filesystems
372 */
373 if ((mp->m_sb.sb_flags & XFS_SBF_READONLY) && !ronly) {
374 cmn_err(CE_WARN,
375 "XFS: cannot mount a read-only filesystem as read-write");
376 return XFS_ERROR(EROFS);
377 }
378
379 /*
380 * check for shared mount.
381 */
382 if (ap->flags & XFSMNT_SHARED) {
383 if (!XFS_SB_VERSION_HASSHARED(&mp->m_sb))
384 return XFS_ERROR(EINVAL);
385
386 /*
387 * For IRIX 6.5, shared mounts must have the shared
388 * version bit set, have the persistent readonly
389 * field set, must be version 0 and can only be mounted
390 * read-only.
391 */
392 if (!ronly || !(mp->m_sb.sb_flags & XFS_SBF_READONLY) ||
393 (mp->m_sb.sb_shared_vn != 0))
394 return XFS_ERROR(EINVAL);
395
396 mp->m_flags |= XFS_MOUNT_SHARED;
397
398 /*
399 * Shared XFS V0 can't deal with DMI. Return EINVAL.
400 */
401 if (mp->m_sb.sb_shared_vn == 0 && (ap->flags & XFSMNT_DMAPI))
402 return XFS_ERROR(EINVAL);
403 }
404
405 return 0;
406 }
407
408 /*
409 * xfs_mount
410 *
411 * The file system configurations are:
412 * (1) device (partition) with data and internal log
413 * (2) logical volume with data and log subvolumes.
414 * (3) logical volume with data, log, and realtime subvolumes.
415 *
416 * We only have to handle opening the log and realtime volumes here if
417 * they are present. The data subvolume has already been opened by
418 * get_sb_bdev() and is stored in vfsp->vfs_super->s_bdev.
419 */
420 STATIC int
421 xfs_mount(
422 struct bhv_desc *bhvp,
423 struct xfs_mount_args *args,
424 cred_t *credp)
425 {
426 struct vfs *vfsp = bhvtovfs(bhvp);
427 struct bhv_desc *p;
428 struct xfs_mount *mp = XFS_BHVTOM(bhvp);
429 struct block_device *ddev, *logdev, *rtdev;
430 int flags = 0, error;
431
432 ddev = vfsp->vfs_super->s_bdev;
433 logdev = rtdev = NULL;
434
435 /*
436 * Setup xfs_mount function vectors from available behaviors
437 */
438 p = vfs_bhv_lookup(vfsp, VFS_POSITION_DM);
439 mp->m_dm_ops = p ? *(xfs_dmops_t *) vfs_bhv_custom(p) : xfs_dmcore_stub;
440 p = vfs_bhv_lookup(vfsp, VFS_POSITION_QM);
441 mp->m_qm_ops = p ? *(xfs_qmops_t *) vfs_bhv_custom(p) : xfs_qmcore_stub;
442 p = vfs_bhv_lookup(vfsp, VFS_POSITION_IO);
443 mp->m_io_ops = p ? *(xfs_ioops_t *) vfs_bhv_custom(p) : xfs_iocore_xfs;
444
445 if (args->flags & XFSMNT_QUIET)
446 flags |= XFS_MFSI_QUIET;
447
448 /*
449 * Open real time and log devices - order is important.
450 */
451 if (args->logname[0]) {
452 error = xfs_blkdev_get(mp, args->logname, &logdev);
453 if (error)
454 return error;
455 }
456 if (args->rtname[0]) {
457 error = xfs_blkdev_get(mp, args->rtname, &rtdev);
458 if (error) {
459 xfs_blkdev_put(logdev);
460 return error;
461 }
462
463 if (rtdev == ddev || rtdev == logdev) {
464 cmn_err(CE_WARN,
465 "XFS: Cannot mount filesystem with identical rtdev and ddev/logdev.");
466 xfs_blkdev_put(logdev);
467 xfs_blkdev_put(rtdev);
468 return EINVAL;
469 }
470 }
471
472 /*
473 * Setup xfs_mount buffer target pointers
474 */
475 error = ENOMEM;
476 mp->m_ddev_targp = xfs_alloc_buftarg(ddev, 0);
477 if (!mp->m_ddev_targp) {
478 xfs_blkdev_put(logdev);
479 xfs_blkdev_put(rtdev);
480 return error;
481 }
482 if (rtdev) {
483 mp->m_rtdev_targp = xfs_alloc_buftarg(rtdev, 1);
484 if (!mp->m_rtdev_targp)
485 goto error0;
486 }
487 mp->m_logdev_targp = (logdev && logdev != ddev) ?
488 xfs_alloc_buftarg(logdev, 1) : mp->m_ddev_targp;
489 if (!mp->m_logdev_targp)
490 goto error0;
491
492 /*
493 * Setup flags based on mount(2) options and then the superblock
494 */
495 error = xfs_start_flags(vfsp, args, mp);
496 if (error)
497 goto error1;
498 error = xfs_readsb(mp, flags);
499 if (error)
500 goto error1;
501 error = xfs_finish_flags(vfsp, args, mp);
502 if (error)
503 goto error2;
504
505 /*
506 * Setup xfs_mount buffer target pointers based on superblock
507 */
508 error = xfs_setsize_buftarg(mp->m_ddev_targp, mp->m_sb.sb_blocksize,
509 mp->m_sb.sb_sectsize);
510 if (!error && logdev && logdev != ddev) {
511 unsigned int log_sector_size = BBSIZE;
512
513 if (XFS_SB_VERSION_HASSECTOR(&mp->m_sb))
514 log_sector_size = mp->m_sb.sb_logsectsize;
515 error = xfs_setsize_buftarg(mp->m_logdev_targp,
516 mp->m_sb.sb_blocksize,
517 log_sector_size);
518 }
519 if (!error && rtdev)
520 error = xfs_setsize_buftarg(mp->m_rtdev_targp,
521 mp->m_sb.sb_blocksize,
522 mp->m_sb.sb_sectsize);
523 if (error)
524 goto error2;
525
526 if ((mp->m_flags & XFS_MOUNT_BARRIER) && !(vfsp->vfs_flag & VFS_RDONLY))
527 xfs_mountfs_check_barriers(mp);
528
529 error = XFS_IOINIT(vfsp, args, flags);
530 if (error)
531 goto error2;
532
533 return 0;
534
535 error2:
536 if (mp->m_sb_bp)
537 xfs_freesb(mp);
538 error1:
539 xfs_binval(mp->m_ddev_targp);
540 if (logdev && logdev != ddev)
541 xfs_binval(mp->m_logdev_targp);
542 if (rtdev)
543 xfs_binval(mp->m_rtdev_targp);
544 error0:
545 xfs_unmountfs_close(mp, credp);
546 return error;
547 }
548
549 STATIC int
550 xfs_unmount(
551 bhv_desc_t *bdp,
552 int flags,
553 cred_t *credp)
554 {
555 struct vfs *vfsp = bhvtovfs(bdp);
556 xfs_mount_t *mp = XFS_BHVTOM(bdp);
557 xfs_inode_t *rip;
558 vnode_t *rvp;
559 int unmount_event_wanted = 0;
560 int unmount_event_flags = 0;
561 int xfs_unmountfs_needed = 0;
562 int error;
563
564 rip = mp->m_rootip;
565 rvp = XFS_ITOV(rip);
566
567 if (vfsp->vfs_flag & VFS_DMI) {
568 error = XFS_SEND_PREUNMOUNT(mp, vfsp,
569 rvp, DM_RIGHT_NULL, rvp, DM_RIGHT_NULL,
570 NULL, NULL, 0, 0,
571 (mp->m_dmevmask & (1<<DM_EVENT_PREUNMOUNT))?
572 0:DM_FLAGS_UNWANTED);
573 if (error)
574 return XFS_ERROR(error);
575 unmount_event_wanted = 1;
576 unmount_event_flags = (mp->m_dmevmask & (1<<DM_EVENT_UNMOUNT))?
577 0 : DM_FLAGS_UNWANTED;
578 }
579
580 /*
581 * First blow any referenced inode from this file system
582 * out of the reference cache, and delete the timer.
583 */
584 xfs_refcache_purge_mp(mp);
585
586 XFS_bflush(mp->m_ddev_targp);
587 error = xfs_unmount_flush(mp, 0);
588 if (error)
589 goto out;
590
591 ASSERT(vn_count(rvp) == 1);
592
593 /*
594 * Drop the reference count
595 */
596 VN_RELE(rvp);
597
598 /*
599 * If we're forcing a shutdown, typically because of a media error,
600 * we want to make sure we invalidate dirty pages that belong to
601 * referenced vnodes as well.
602 */
603 if (XFS_FORCED_SHUTDOWN(mp)) {
604 error = xfs_sync(&mp->m_bhv,
605 (SYNC_WAIT | SYNC_CLOSE), credp);
606 ASSERT(error != EFSCORRUPTED);
607 }
608 xfs_unmountfs_needed = 1;
609
610 out:
611 /* Send DMAPI event, if required.
612 * Then do xfs_unmountfs() if needed.
613 * Then return error (or zero).
614 */
615 if (unmount_event_wanted) {
616 /* Note: mp structure must still exist for
617 * XFS_SEND_UNMOUNT() call.
618 */
619 XFS_SEND_UNMOUNT(mp, vfsp, error == 0 ? rvp : NULL,
620 DM_RIGHT_NULL, 0, error, unmount_event_flags);
621 }
622 if (xfs_unmountfs_needed) {
623 /*
624 * Call common unmount function to flush to disk
625 * and free the super block buffer & mount structures.
626 */
627 xfs_unmountfs(mp, credp);
628 }
629
630 return XFS_ERROR(error);
631 }
632
633 STATIC int
634 xfs_quiesce_fs(
635 xfs_mount_t *mp)
636 {
637 int count = 0, pincount;
638
639 xfs_refcache_purge_mp(mp);
640 xfs_flush_buftarg(mp->m_ddev_targp, 0);
641 xfs_finish_reclaim_all(mp, 0);
642
643 /* This loop must run at least twice.
644 * The first instance of the loop will flush
645 * most meta data but that will generate more
646 * meta data (typically directory updates).
647 * Which then must be flushed and logged before
648 * we can write the unmount record.
649 */
650 do {
651 xfs_syncsub(mp, SYNC_REMOUNT|SYNC_ATTR|SYNC_WAIT, 0, NULL);
652 pincount = xfs_flush_buftarg(mp->m_ddev_targp, 1);
653 if (!pincount) {
654 delay(50);
655 count++;
656 }
657 } while (count < 2);
658
659 return 0;
660 }
661
662 STATIC int
663 xfs_mntupdate(
664 bhv_desc_t *bdp,
665 int *flags,
666 struct xfs_mount_args *args)
667 {
668 struct vfs *vfsp = bhvtovfs(bdp);
669 xfs_mount_t *mp = XFS_BHVTOM(bdp);
670 int error;
671
672 if (!(*flags & MS_RDONLY)) { /* rw/ro -> rw */
673 if (vfsp->vfs_flag & VFS_RDONLY)
674 vfsp->vfs_flag &= ~VFS_RDONLY;
675 if (args->flags & XFSMNT_BARRIER) {
676 mp->m_flags |= XFS_MOUNT_BARRIER;
677 xfs_mountfs_check_barriers(mp);
678 } else {
679 mp->m_flags &= ~XFS_MOUNT_BARRIER;
680 }
681 } else if (!(vfsp->vfs_flag & VFS_RDONLY)) { /* rw -> ro */
682 VFS_SYNC(vfsp, SYNC_FSDATA|SYNC_BDFLUSH|SYNC_ATTR, NULL, error);
683 xfs_quiesce_fs(mp);
684 xfs_log_unmount_write(mp);
685 xfs_unmountfs_writesb(mp);
686 vfsp->vfs_flag |= VFS_RDONLY;
687 }
688 return 0;
689 }
690
691 /*
692 * xfs_unmount_flush implements a set of flush operation on special
693 * inodes, which are needed as a separate set of operations so that
694 * they can be called as part of relocation process.
695 */
696 int
697 xfs_unmount_flush(
698 xfs_mount_t *mp, /* Mount structure we are getting
699 rid of. */
700 int relocation) /* Called from vfs relocation. */
701 {
702 xfs_inode_t *rip = mp->m_rootip;
703 xfs_inode_t *rbmip;
704 xfs_inode_t *rsumip = NULL;
705 vnode_t *rvp = XFS_ITOV(rip);
706 int error;
707
708 xfs_ilock(rip, XFS_ILOCK_EXCL);
709 xfs_iflock(rip);
710
711 /*
712 * Flush out the real time inodes.
713 */
714 if ((rbmip = mp->m_rbmip) != NULL) {
715 xfs_ilock(rbmip, XFS_ILOCK_EXCL);
716 xfs_iflock(rbmip);
717 error = xfs_iflush(rbmip, XFS_IFLUSH_SYNC);
718 xfs_iunlock(rbmip, XFS_ILOCK_EXCL);
719
720 if (error == EFSCORRUPTED)
721 goto fscorrupt_out;
722
723 ASSERT(vn_count(XFS_ITOV(rbmip)) == 1);
724
725 rsumip = mp->m_rsumip;
726 xfs_ilock(rsumip, XFS_ILOCK_EXCL);
727 xfs_iflock(rsumip);
728 error = xfs_iflush(rsumip, XFS_IFLUSH_SYNC);
729 xfs_iunlock(rsumip, XFS_ILOCK_EXCL);
730
731 if (error == EFSCORRUPTED)
732 goto fscorrupt_out;
733
734 ASSERT(vn_count(XFS_ITOV(rsumip)) == 1);
735 }
736
737 /*
738 * Synchronously flush root inode to disk
739 */
740 error = xfs_iflush(rip, XFS_IFLUSH_SYNC);
741 if (error == EFSCORRUPTED)
742 goto fscorrupt_out2;
743
744 if (vn_count(rvp) != 1 && !relocation) {
745 xfs_iunlock(rip, XFS_ILOCK_EXCL);
746 return XFS_ERROR(EBUSY);
747 }
748
749 /*
750 * Release dquot that rootinode, rbmino and rsumino might be holding,
751 * flush and purge the quota inodes.
752 */
753 error = XFS_QM_UNMOUNT(mp);
754 if (error == EFSCORRUPTED)
755 goto fscorrupt_out2;
756
757 if (rbmip) {
758 VN_RELE(XFS_ITOV(rbmip));
759 VN_RELE(XFS_ITOV(rsumip));
760 }
761
762 xfs_iunlock(rip, XFS_ILOCK_EXCL);
763 return 0;
764
765 fscorrupt_out:
766 xfs_ifunlock(rip);
767
768 fscorrupt_out2:
769 xfs_iunlock(rip, XFS_ILOCK_EXCL);
770
771 return XFS_ERROR(EFSCORRUPTED);
772 }
773
774 /*
775 * xfs_root extracts the root vnode from a vfs.
776 *
777 * vfsp -- the vfs struct for the desired file system
778 * vpp -- address of the caller's vnode pointer which should be
779 * set to the desired fs root vnode
780 */
781 STATIC int
782 xfs_root(
783 bhv_desc_t *bdp,
784 vnode_t **vpp)
785 {
786 vnode_t *vp;
787
788 vp = XFS_ITOV((XFS_BHVTOM(bdp))->m_rootip);
789 VN_HOLD(vp);
790 *vpp = vp;
791 return 0;
792 }
793
794 /*
795 * xfs_statvfs
796 *
797 * Fill in the statvfs structure for the given file system. We use
798 * the superblock lock in the mount structure to ensure a consistent
799 * snapshot of the counters returned.
800 */
801 STATIC int
802 xfs_statvfs(
803 bhv_desc_t *bdp,
804 xfs_statfs_t *statp,
805 vnode_t *vp)
806 {
807 __uint64_t fakeinos;
808 xfs_extlen_t lsize;
809 xfs_mount_t *mp;
810 xfs_sb_t *sbp;
811 unsigned long s;
812
813 mp = XFS_BHVTOM(bdp);
814 sbp = &(mp->m_sb);
815
816 statp->f_type = XFS_SB_MAGIC;
817
818 xfs_icsb_sync_counters_lazy(mp);
819 s = XFS_SB_LOCK(mp);
820 statp->f_bsize = sbp->sb_blocksize;
821 lsize = sbp->sb_logstart ? sbp->sb_logblocks : 0;
822 statp->f_blocks = sbp->sb_dblocks - lsize;
823 statp->f_bfree = statp->f_bavail = sbp->sb_fdblocks;
824 fakeinos = statp->f_bfree << sbp->sb_inopblog;
825 #if XFS_BIG_INUMS
826 fakeinos += mp->m_inoadd;
827 #endif
828 statp->f_files =
829 MIN(sbp->sb_icount + fakeinos, (__uint64_t)XFS_MAXINUMBER);
830 if (mp->m_maxicount)
831 #if XFS_BIG_INUMS
832 if (!mp->m_inoadd)
833 #endif
834 statp->f_files = min_t(typeof(statp->f_files),
835 statp->f_files,
836 mp->m_maxicount);
837 statp->f_ffree = statp->f_files - (sbp->sb_icount - sbp->sb_ifree);
838 XFS_SB_UNLOCK(mp, s);
839
840 xfs_statvfs_fsid(statp, mp);
841 statp->f_namelen = MAXNAMELEN - 1;
842
843 return 0;
844 }
845
846
847 /*
848 * xfs_sync flushes any pending I/O to file system vfsp.
849 *
850 * This routine is called by vfs_sync() to make sure that things make it
851 * out to disk eventually, on sync() system calls to flush out everything,
852 * and when the file system is unmounted. For the vfs_sync() case, all
853 * we really need to do is sync out the log to make all of our meta-data
854 * updates permanent (except for timestamps). For calls from pflushd(),
855 * dirty pages are kept moving by calling pdflush() on the inodes
856 * containing them. We also flush the inodes that we can lock without
857 * sleeping and the superblock if we can lock it without sleeping from
858 * vfs_sync() so that items at the tail of the log are always moving out.
859 *
860 * Flags:
861 * SYNC_BDFLUSH - We're being called from vfs_sync() so we don't want
862 * to sleep if we can help it. All we really need
863 * to do is ensure that the log is synced at least
864 * periodically. We also push the inodes and
865 * superblock if we can lock them without sleeping
866 * and they are not pinned.
867 * SYNC_ATTR - We need to flush the inodes. If SYNC_BDFLUSH is not
868 * set, then we really want to lock each inode and flush
869 * it.
870 * SYNC_WAIT - All the flushes that take place in this call should
871 * be synchronous.
872 * SYNC_DELWRI - This tells us to push dirty pages associated with
873 * inodes. SYNC_WAIT and SYNC_BDFLUSH are used to
874 * determine if they should be flushed sync, async, or
875 * delwri.
876 * SYNC_CLOSE - This flag is passed when the system is being
877 * unmounted. We should sync and invalidate everything.
878 * SYNC_FSDATA - This indicates that the caller would like to make
879 * sure the superblock is safe on disk. We can ensure
880 * this by simply making sure the log gets flushed
881 * if SYNC_BDFLUSH is set, and by actually writing it
882 * out otherwise.
883 *
884 */
885 /*ARGSUSED*/
886 STATIC int
887 xfs_sync(
888 bhv_desc_t *bdp,
889 int flags,
890 cred_t *credp)
891 {
892 xfs_mount_t *mp = XFS_BHVTOM(bdp);
893
894 if (unlikely(flags == SYNC_QUIESCE))
895 return xfs_quiesce_fs(mp);
896 else
897 return xfs_syncsub(mp, flags, 0, NULL);
898 }
899
900 /*
901 * xfs sync routine for internal use
902 *
903 * This routine supports all of the flags defined for the generic VFS_SYNC
904 * interface as explained above under xfs_sync. In the interests of not
905 * changing interfaces within the 6.5 family, additional internally-
906 * required functions are specified within a separate xflags parameter,
907 * only available by calling this routine.
908 *
909 */
910 int
911 xfs_sync_inodes(
912 xfs_mount_t *mp,
913 int flags,
914 int xflags,
915 int *bypassed)
916 {
917 xfs_inode_t *ip = NULL;
918 xfs_inode_t *ip_next;
919 xfs_buf_t *bp;
920 vnode_t *vp = NULL;
921 int error;
922 int last_error;
923 uint64_t fflag;
924 uint lock_flags;
925 uint base_lock_flags;
926 boolean_t mount_locked;
927 boolean_t vnode_refed;
928 int preempt;
929 xfs_dinode_t *dip;
930 xfs_iptr_t *ipointer;
931 #ifdef DEBUG
932 boolean_t ipointer_in = B_FALSE;
933
934 #define IPOINTER_SET ipointer_in = B_TRUE
935 #define IPOINTER_CLR ipointer_in = B_FALSE
936 #else
937 #define IPOINTER_SET
938 #define IPOINTER_CLR
939 #endif
940
941
942 /* Insert a marker record into the inode list after inode ip. The list
943 * must be locked when this is called. After the call the list will no
944 * longer be locked.
945 */
946 #define IPOINTER_INSERT(ip, mp) { \
947 ASSERT(ipointer_in == B_FALSE); \
948 ipointer->ip_mnext = ip->i_mnext; \
949 ipointer->ip_mprev = ip; \
950 ip->i_mnext = (xfs_inode_t *)ipointer; \
951 ipointer->ip_mnext->i_mprev = (xfs_inode_t *)ipointer; \
952 preempt = 0; \
953 XFS_MOUNT_IUNLOCK(mp); \
954 mount_locked = B_FALSE; \
955 IPOINTER_SET; \
956 }
957
958 /* Remove the marker from the inode list. If the marker was the only item
959 * in the list then there are no remaining inodes and we should zero out
960 * the whole list. If we are the current head of the list then move the head
961 * past us.
962 */
963 #define IPOINTER_REMOVE(ip, mp) { \
964 ASSERT(ipointer_in == B_TRUE); \
965 if (ipointer->ip_mnext != (xfs_inode_t *)ipointer) { \
966 ip = ipointer->ip_mnext; \
967 ip->i_mprev = ipointer->ip_mprev; \
968 ipointer->ip_mprev->i_mnext = ip; \
969 if (mp->m_inodes == (xfs_inode_t *)ipointer) { \
970 mp->m_inodes = ip; \
971 } \
972 } else { \
973 ASSERT(mp->m_inodes == (xfs_inode_t *)ipointer); \
974 mp->m_inodes = NULL; \
975 ip = NULL; \
976 } \
977 IPOINTER_CLR; \
978 }
979
980 #define XFS_PREEMPT_MASK 0x7f
981
982 if (bypassed)
983 *bypassed = 0;
984 if (XFS_MTOVFS(mp)->vfs_flag & VFS_RDONLY)
985 return 0;
986 error = 0;
987 last_error = 0;
988 preempt = 0;
989
990 /* Allocate a reference marker */
991 ipointer = (xfs_iptr_t *)kmem_zalloc(sizeof(xfs_iptr_t), KM_SLEEP);
992
993 fflag = XFS_B_ASYNC; /* default is don't wait */
994 if (flags & (SYNC_BDFLUSH | SYNC_DELWRI))
995 fflag = XFS_B_DELWRI;
996 if (flags & SYNC_WAIT)
997 fflag = 0; /* synchronous overrides all */
998
999 base_lock_flags = XFS_ILOCK_SHARED;
1000 if (flags & (SYNC_DELWRI | SYNC_CLOSE)) {
1001 /*
1002 * We need the I/O lock if we're going to call any of
1003 * the flush/inval routines.
1004 */
1005 base_lock_flags |= XFS_IOLOCK_SHARED;
1006 }
1007
1008 XFS_MOUNT_ILOCK(mp);
1009
1010 ip = mp->m_inodes;
1011
1012 mount_locked = B_TRUE;
1013 vnode_refed = B_FALSE;
1014
1015 IPOINTER_CLR;
1016
1017 do {
1018 ASSERT(ipointer_in == B_FALSE);
1019 ASSERT(vnode_refed == B_FALSE);
1020
1021 lock_flags = base_lock_flags;
1022
1023 /*
1024 * There were no inodes in the list, just break out
1025 * of the loop.
1026 */
1027 if (ip == NULL) {
1028 break;
1029 }
1030
1031 /*
1032 * We found another sync thread marker - skip it
1033 */
1034 if (ip->i_mount == NULL) {
1035 ip = ip->i_mnext;
1036 continue;
1037 }
1038
1039 vp = XFS_ITOV_NULL(ip);
1040
1041 /*
1042 * If the vnode is gone then this is being torn down,
1043 * call reclaim if it is flushed, else let regular flush
1044 * code deal with it later in the loop.
1045 */
1046
1047 if (vp == NULL) {
1048 /* Skip ones already in reclaim */
1049 if (ip->i_flags & XFS_IRECLAIM) {
1050 ip = ip->i_mnext;
1051 continue;
1052 }
1053 if (xfs_ilock_nowait(ip, XFS_ILOCK_EXCL) == 0) {
1054 ip = ip->i_mnext;
1055 } else if ((xfs_ipincount(ip) == 0) &&
1056 xfs_iflock_nowait(ip)) {
1057 IPOINTER_INSERT(ip, mp);
1058
1059 xfs_finish_reclaim(ip, 1,
1060 XFS_IFLUSH_DELWRI_ELSE_ASYNC);
1061
1062 XFS_MOUNT_ILOCK(mp);
1063 mount_locked = B_TRUE;
1064 IPOINTER_REMOVE(ip, mp);
1065 } else {
1066 xfs_iunlock(ip, XFS_ILOCK_EXCL);
1067 ip = ip->i_mnext;
1068 }
1069 continue;
1070 }
1071
1072 if (VN_BAD(vp)) {
1073 ip = ip->i_mnext;
1074 continue;
1075 }
1076
1077 if (XFS_FORCED_SHUTDOWN(mp) && !(flags & SYNC_CLOSE)) {
1078 XFS_MOUNT_IUNLOCK(mp);
1079 kmem_free(ipointer, sizeof(xfs_iptr_t));
1080 return 0;
1081 }
1082
1083 /*
1084 * If this is just vfs_sync() or pflushd() calling
1085 * then we can skip inodes for which it looks like
1086 * there is nothing to do. Since we don't have the
1087 * inode locked this is racy, but these are periodic
1088 * calls so it doesn't matter. For the others we want
1089 * to know for sure, so we at least try to lock them.
1090 */
1091 if (flags & SYNC_BDFLUSH) {
1092 if (((ip->i_itemp == NULL) ||
1093 !(ip->i_itemp->ili_format.ilf_fields &
1094 XFS_ILOG_ALL)) &&
1095 (ip->i_update_core == 0)) {
1096 ip = ip->i_mnext;
1097 continue;
1098 }
1099 }
1100
1101 /*
1102 * Try to lock without sleeping. We're out of order with
1103 * the inode list lock here, so if we fail we need to drop
1104 * the mount lock and try again. If we're called from
1105 * bdflush() here, then don't bother.
1106 *
1107 * The inode lock here actually coordinates with the
1108 * almost spurious inode lock in xfs_ireclaim() to prevent
1109 * the vnode we handle here without a reference from
1110 * being freed while we reference it. If we lock the inode
1111 * while it's on the mount list here, then the spurious inode
1112 * lock in xfs_ireclaim() after the inode is pulled from
1113 * the mount list will sleep until we release it here.
1114 * This keeps the vnode from being freed while we reference
1115 * it.
1116 */
1117 if (xfs_ilock_nowait(ip, lock_flags) == 0) {
1118 if ((flags & SYNC_BDFLUSH) || (vp == NULL)) {
1119 ip = ip->i_mnext;
1120 continue;
1121 }
1122
1123 vp = vn_grab(vp);
1124 if (vp == NULL) {
1125 ip = ip->i_mnext;
1126 continue;
1127 }
1128
1129 IPOINTER_INSERT(ip, mp);
1130 xfs_ilock(ip, lock_flags);
1131
1132 ASSERT(vp == XFS_ITOV(ip));
1133 ASSERT(ip->i_mount == mp);
1134
1135 vnode_refed = B_TRUE;
1136 }
1137
1138 /* From here on in the loop we may have a marker record
1139 * in the inode list.
1140 */
1141
1142 if ((flags & SYNC_CLOSE) && (vp != NULL)) {
1143 /*
1144 * This is the shutdown case. We just need to
1145 * flush and invalidate all the pages associated
1146 * with the inode. Drop the inode lock since
1147 * we can't hold it across calls to the buffer
1148 * cache.
1149 *
1150 * We don't set the VREMAPPING bit in the vnode
1151 * here, because we don't hold the vnode lock
1152 * exclusively. It doesn't really matter, though,
1153 * because we only come here when we're shutting
1154 * down anyway.
1155 */
1156 xfs_iunlock(ip, XFS_ILOCK_SHARED);
1157
1158 if (XFS_FORCED_SHUTDOWN(mp)) {
1159 VOP_TOSS_PAGES(vp, 0, -1, FI_REMAPF);
1160 } else {
1161 VOP_FLUSHINVAL_PAGES(vp, 0, -1, FI_REMAPF);
1162 }
1163
1164 xfs_ilock(ip, XFS_ILOCK_SHARED);
1165
1166 } else if ((flags & SYNC_DELWRI) && (vp != NULL)) {
1167 if (VN_DIRTY(vp)) {
1168 /* We need to have dropped the lock here,
1169 * so insert a marker if we have not already
1170 * done so.
1171 */
1172 if (mount_locked) {
1173 IPOINTER_INSERT(ip, mp);
1174 }
1175
1176 /*
1177 * Drop the inode lock since we can't hold it
1178 * across calls to the buffer cache.
1179 */
1180 xfs_iunlock(ip, XFS_ILOCK_SHARED);
1181 VOP_FLUSH_PAGES(vp, (xfs_off_t)0, -1,
1182 fflag, FI_NONE, error);
1183 xfs_ilock(ip, XFS_ILOCK_SHARED);
1184 }
1185
1186 }
1187
1188 if (flags & SYNC_BDFLUSH) {
1189 if ((flags & SYNC_ATTR) &&
1190 ((ip->i_update_core) ||
1191 ((ip->i_itemp != NULL) &&
1192 (ip->i_itemp->ili_format.ilf_fields != 0)))) {
1193
1194 /* Insert marker and drop lock if not already
1195 * done.
1196 */
1197 if (mount_locked) {
1198 IPOINTER_INSERT(ip, mp);
1199 }
1200
1201 /*
1202 * We don't want the periodic flushing of the
1203 * inodes by vfs_sync() to interfere with
1204 * I/O to the file, especially read I/O
1205 * where it is only the access time stamp
1206 * that is being flushed out. To prevent
1207 * long periods where we have both inode
1208 * locks held shared here while reading the
1209 * inode's buffer in from disk, we drop the
1210 * inode lock while reading in the inode
1211 * buffer. We have to release the buffer
1212 * and reacquire the inode lock so that they
1213 * are acquired in the proper order (inode
1214 * locks first). The buffer will go at the
1215 * end of the lru chain, though, so we can
1216 * expect it to still be there when we go
1217 * for it again in xfs_iflush().
1218 */
1219 if ((xfs_ipincount(ip) == 0) &&
1220 xfs_iflock_nowait(ip)) {
1221
1222 xfs_ifunlock(ip);
1223 xfs_iunlock(ip, XFS_ILOCK_SHARED);
1224
1225 error = xfs_itobp(mp, NULL, ip,
1226 &dip, &bp, 0, 0);
1227 if (!error) {
1228 xfs_buf_relse(bp);
1229 } else {
1230 /* Bailing out, remove the
1231 * marker and free it.
1232 */
1233 XFS_MOUNT_ILOCK(mp);
1234
1235 IPOINTER_REMOVE(ip, mp);
1236
1237 XFS_MOUNT_IUNLOCK(mp);
1238
1239 ASSERT(!(lock_flags &
1240 XFS_IOLOCK_SHARED));
1241
1242 kmem_free(ipointer,
1243 sizeof(xfs_iptr_t));
1244 return (0);
1245 }
1246
1247 /*
1248 * Since we dropped the inode lock,
1249 * the inode may have been reclaimed.
1250 * Therefore, we reacquire the mount
1251 * lock and check to see if we were the
1252 * inode reclaimed. If this happened
1253 * then the ipointer marker will no
1254 * longer point back at us. In this
1255 * case, move ip along to the inode
1256 * after the marker, remove the marker
1257 * and continue.
1258 */
1259 XFS_MOUNT_ILOCK(mp);
1260 mount_locked = B_TRUE;
1261
1262 if (ip != ipointer->ip_mprev) {
1263 IPOINTER_REMOVE(ip, mp);
1264
1265 ASSERT(!vnode_refed);
1266 ASSERT(!(lock_flags &
1267 XFS_IOLOCK_SHARED));
1268 continue;
1269 }
1270
1271 ASSERT(ip->i_mount == mp);
1272
1273 if (xfs_ilock_nowait(ip,
1274 XFS_ILOCK_SHARED) == 0) {
1275 ASSERT(ip->i_mount == mp);
1276 /*
1277 * We failed to reacquire
1278 * the inode lock without
1279 * sleeping, so just skip
1280 * the inode for now. We
1281 * clear the ILOCK bit from
1282 * the lock_flags so that we
1283 * won't try to drop a lock
1284 * we don't hold below.
1285 */
1286 lock_flags &= ~XFS_ILOCK_SHARED;
1287 IPOINTER_REMOVE(ip_next, mp);
1288 } else if ((xfs_ipincount(ip) == 0) &&
1289 xfs_iflock_nowait(ip)) {
1290 ASSERT(ip->i_mount == mp);
1291 /*
1292 * Since this is vfs_sync()
1293 * calling we only flush the
1294 * inode out if we can lock
1295 * it without sleeping and
1296 * it is not pinned. Drop
1297 * the mount lock here so
1298 * that we don't hold it for
1299 * too long. We already have
1300 * a marker in the list here.
1301 */
1302 XFS_MOUNT_IUNLOCK(mp);
1303 mount_locked = B_FALSE;
1304 error = xfs_iflush(ip,
1305 XFS_IFLUSH_DELWRI);
1306 } else {
1307 ASSERT(ip->i_mount == mp);
1308 IPOINTER_REMOVE(ip_next, mp);
1309 }
1310 }
1311
1312 }
1313
1314 } else {
1315 if ((flags & SYNC_ATTR) &&
1316 ((ip->i_update_core) ||
1317 ((ip->i_itemp != NULL) &&
1318 (ip->i_itemp->ili_format.ilf_fields != 0)))) {
1319 if (mount_locked) {
1320 IPOINTER_INSERT(ip, mp);
1321 }
1322
1323 if (flags & SYNC_WAIT) {
1324 xfs_iflock(ip);
1325 error = xfs_iflush(ip,
1326 XFS_IFLUSH_SYNC);
1327 } else {
1328 /*
1329 * If we can't acquire the flush
1330 * lock, then the inode is already
1331 * being flushed so don't bother
1332 * waiting. If we can lock it then
1333 * do a delwri flush so we can
1334 * combine multiple inode flushes
1335 * in each disk write.
1336 */
1337 if (xfs_iflock_nowait(ip)) {
1338 error = xfs_iflush(ip,
1339 XFS_IFLUSH_DELWRI);
1340 }
1341 else if (bypassed)
1342 (*bypassed)++;
1343 }
1344 }
1345 }
1346
1347 if (lock_flags != 0) {
1348 xfs_iunlock(ip, lock_flags);
1349 }
1350
1351 if (vnode_refed) {
1352 /*
1353 * If we had to take a reference on the vnode
1354 * above, then wait until after we've unlocked
1355 * the inode to release the reference. This is
1356 * because we can be already holding the inode
1357 * lock when VN_RELE() calls xfs_inactive().
1358 *
1359 * Make sure to drop the mount lock before calling
1360 * VN_RELE() so that we don't trip over ourselves if
1361 * we have to go for the mount lock again in the
1362 * inactive code.
1363 */
1364 if (mount_locked) {
1365 IPOINTER_INSERT(ip, mp);
1366 }
1367
1368 VN_RELE(vp);
1369
1370 vnode_refed = B_FALSE;
1371 }
1372
1373 if (error) {
1374 last_error = error;
1375 }
1376
1377 /*
1378 * bail out if the filesystem is corrupted.
1379 */
1380 if (error == EFSCORRUPTED) {
1381 if (!mount_locked) {
1382 XFS_MOUNT_ILOCK(mp);
1383 IPOINTER_REMOVE(ip, mp);
1384 }
1385 XFS_MOUNT_IUNLOCK(mp);
1386 ASSERT(ipointer_in == B_FALSE);
1387 kmem_free(ipointer, sizeof(xfs_iptr_t));
1388 return XFS_ERROR(error);
1389 }
1390
1391 /* Let other threads have a chance at the mount lock
1392 * if we have looped many times without dropping the
1393 * lock.
1394 */
1395 if ((++preempt & XFS_PREEMPT_MASK) == 0) {
1396 if (mount_locked) {
1397 IPOINTER_INSERT(ip, mp);
1398 }
1399 }
1400
1401 if (mount_locked == B_FALSE) {
1402 XFS_MOUNT_ILOCK(mp);
1403 mount_locked = B_TRUE;
1404 IPOINTER_REMOVE(ip, mp);
1405 continue;
1406 }
1407
1408 ASSERT(ipointer_in == B_FALSE);
1409 ip = ip->i_mnext;
1410
1411 } while (ip != mp->m_inodes);
1412
1413 XFS_MOUNT_IUNLOCK(mp);
1414
1415 ASSERT(ipointer_in == B_FALSE);
1416
1417 kmem_free(ipointer, sizeof(xfs_iptr_t));
1418 return XFS_ERROR(last_error);
1419 }
1420
1421 /*
1422 * xfs sync routine for internal use
1423 *
1424 * This routine supports all of the flags defined for the generic VFS_SYNC
1425 * interface as explained above under xfs_sync. In the interests of not
1426 * changing interfaces within the 6.5 family, additional internally-
1427 * required functions are specified within a separate xflags parameter,
1428 * only available by calling this routine.
1429 *
1430 */
1431 int
1432 xfs_syncsub(
1433 xfs_mount_t *mp,
1434 int flags,
1435 int xflags,
1436 int *bypassed)
1437 {
1438 int error = 0;
1439 int last_error = 0;
1440 uint log_flags = XFS_LOG_FORCE;
1441 xfs_buf_t *bp;
1442 xfs_buf_log_item_t *bip;
1443
1444 /*
1445 * Sync out the log. This ensures that the log is periodically
1446 * flushed even if there is not enough activity to fill it up.
1447 */
1448 if (flags & SYNC_WAIT)
1449 log_flags |= XFS_LOG_SYNC;
1450
1451 xfs_log_force(mp, (xfs_lsn_t)0, log_flags);
1452
1453 if (flags & (SYNC_ATTR|SYNC_DELWRI)) {
1454 if (flags & SYNC_BDFLUSH)
1455 xfs_finish_reclaim_all(mp, 1);
1456 else
1457 error = xfs_sync_inodes(mp, flags, xflags, bypassed);
1458 }
1459
1460 /*
1461 * Flushing out dirty data above probably generated more
1462 * log activity, so if this isn't vfs_sync() then flush
1463 * the log again.
1464 */
1465 if (flags & SYNC_DELWRI) {
1466 xfs_log_force(mp, (xfs_lsn_t)0, log_flags);
1467 }
1468
1469 if (flags & SYNC_FSDATA) {
1470 /*
1471 * If this is vfs_sync() then only sync the superblock
1472 * if we can lock it without sleeping and it is not pinned.
1473 */
1474 if (flags & SYNC_BDFLUSH) {
1475 bp = xfs_getsb(mp, XFS_BUF_TRYLOCK);
1476 if (bp != NULL) {
1477 bip = XFS_BUF_FSPRIVATE(bp,xfs_buf_log_item_t*);
1478 if ((bip != NULL) &&
1479 xfs_buf_item_dirty(bip)) {
1480 if (!(XFS_BUF_ISPINNED(bp))) {
1481 XFS_BUF_ASYNC(bp);
1482 error = xfs_bwrite(mp, bp);
1483 } else {
1484 xfs_buf_relse(bp);
1485 }
1486 } else {
1487 xfs_buf_relse(bp);
1488 }
1489 }
1490 } else {
1491 bp = xfs_getsb(mp, 0);
1492 /*
1493 * If the buffer is pinned then push on the log so
1494 * we won't get stuck waiting in the write for
1495 * someone, maybe ourselves, to flush the log.
1496 * Even though we just pushed the log above, we
1497 * did not have the superblock buffer locked at
1498 * that point so it can become pinned in between
1499 * there and here.
1500 */
1501 if (XFS_BUF_ISPINNED(bp))
1502 xfs_log_force(mp, (xfs_lsn_t)0, XFS_LOG_FORCE);
1503 if (flags & SYNC_WAIT)
1504 XFS_BUF_UNASYNC(bp);
1505 else
1506 XFS_BUF_ASYNC(bp);
1507 error = xfs_bwrite(mp, bp);
1508 }
1509 if (error) {
1510 last_error = error;
1511 }
1512 }
1513
1514 /*
1515 * If this is the periodic sync, then kick some entries out of
1516 * the reference cache. This ensures that idle entries are
1517 * eventually kicked out of the cache.
1518 */
1519 if (flags & SYNC_REFCACHE) {
1520 if (flags & SYNC_WAIT)
1521 xfs_refcache_purge_mp(mp);
1522 else
1523 xfs_refcache_purge_some(mp);
1524 }
1525
1526 /*
1527 * Now check to see if the log needs a "dummy" transaction.
1528 */
1529
1530 if (!(flags & SYNC_REMOUNT) && xfs_log_need_covered(mp)) {
1531 xfs_trans_t *tp;
1532 xfs_inode_t *ip;
1533
1534 /*
1535 * Put a dummy transaction in the log to tell
1536 * recovery that all others are OK.
1537 */
1538 tp = xfs_trans_alloc(mp, XFS_TRANS_DUMMY1);
1539 if ((error = xfs_trans_reserve(tp, 0,
1540 XFS_ICHANGE_LOG_RES(mp),
1541 0, 0, 0))) {
1542 xfs_trans_cancel(tp, 0);
1543 return error;
1544 }
1545
1546 ip = mp->m_rootip;
1547 xfs_ilock(ip, XFS_ILOCK_EXCL);
1548
1549 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
1550 xfs_trans_ihold(tp, ip);
1551 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1552 error = xfs_trans_commit(tp, 0, NULL);
1553 xfs_iunlock(ip, XFS_ILOCK_EXCL);
1554 xfs_log_force(mp, (xfs_lsn_t)0, log_flags);
1555 }
1556
1557 /*
1558 * When shutting down, we need to insure that the AIL is pushed
1559 * to disk or the filesystem can appear corrupt from the PROM.
1560 */
1561 if ((flags & (SYNC_CLOSE|SYNC_WAIT)) == (SYNC_CLOSE|SYNC_WAIT)) {
1562 XFS_bflush(mp->m_ddev_targp);
1563 if (mp->m_rtdev_targp) {
1564 XFS_bflush(mp->m_rtdev_targp);
1565 }
1566 }
1567
1568 return XFS_ERROR(last_error);
1569 }
1570
1571 /*
1572 * xfs_vget - called by DMAPI and NFSD to get vnode from file handle
1573 */
1574 STATIC int
1575 xfs_vget(
1576 bhv_desc_t *bdp,
1577 vnode_t **vpp,
1578 fid_t *fidp)
1579 {
1580 xfs_mount_t *mp = XFS_BHVTOM(bdp);
1581 xfs_fid_t *xfid = (struct xfs_fid *)fidp;
1582 xfs_inode_t *ip;
1583 int error;
1584 xfs_ino_t ino;
1585 unsigned int igen;
1586
1587 /*
1588 * Invalid. Since handles can be created in user space and passed in
1589 * via gethandle(), this is not cause for a panic.
1590 */
1591 if (xfid->xfs_fid_len != sizeof(*xfid) - sizeof(xfid->xfs_fid_len))
1592 return XFS_ERROR(EINVAL);
1593
1594 ino = xfid->xfs_fid_ino;
1595 igen = xfid->xfs_fid_gen;
1596
1597 /*
1598 * NFS can sometimes send requests for ino 0. Fail them gracefully.
1599 */
1600 if (ino == 0)
1601 return XFS_ERROR(ESTALE);
1602
1603 error = xfs_iget(mp, NULL, ino, 0, XFS_ILOCK_SHARED, &ip, 0);
1604 if (error) {
1605 *vpp = NULL;
1606 return error;
1607 }
1608
1609 if (ip == NULL) {
1610 *vpp = NULL;
1611 return XFS_ERROR(EIO);
1612 }
1613
1614 if (ip->i_d.di_mode == 0 || ip->i_d.di_gen != igen) {
1615 xfs_iput_new(ip, XFS_ILOCK_SHARED);
1616 *vpp = NULL;
1617 return XFS_ERROR(ENOENT);
1618 }
1619
1620 *vpp = XFS_ITOV(ip);
1621 xfs_iunlock(ip, XFS_ILOCK_SHARED);
1622 return 0;
1623 }
1624
1625
1626 #define MNTOPT_LOGBUFS "logbufs" /* number of XFS log buffers */
1627 #define MNTOPT_LOGBSIZE "logbsize" /* size of XFS log buffers */
1628 #define MNTOPT_LOGDEV "logdev" /* log device */
1629 #define MNTOPT_RTDEV "rtdev" /* realtime I/O device */
1630 #define MNTOPT_BIOSIZE "biosize" /* log2 of preferred buffered io size */
1631 #define MNTOPT_WSYNC "wsync" /* safe-mode nfs compatible mount */
1632 #define MNTOPT_INO64 "ino64" /* force inodes into 64-bit range */
1633 #define MNTOPT_NOALIGN "noalign" /* turn off stripe alignment */
1634 #define MNTOPT_SWALLOC "swalloc" /* turn on stripe width allocation */
1635 #define MNTOPT_SUNIT "sunit" /* data volume stripe unit */
1636 #define MNTOPT_SWIDTH "swidth" /* data volume stripe width */
1637 #define MNTOPT_NOUUID "nouuid" /* ignore filesystem UUID */
1638 #define MNTOPT_MTPT "mtpt" /* filesystem mount point */
1639 #define MNTOPT_GRPID "grpid" /* group-ID from parent directory */
1640 #define MNTOPT_NOGRPID "nogrpid" /* group-ID from current process */
1641 #define MNTOPT_BSDGROUPS "bsdgroups" /* group-ID from parent directory */
1642 #define MNTOPT_SYSVGROUPS "sysvgroups" /* group-ID from current process */
1643 #define MNTOPT_ALLOCSIZE "allocsize" /* preferred allocation size */
1644 #define MNTOPT_IHASHSIZE "ihashsize" /* size of inode hash table */
1645 #define MNTOPT_NORECOVERY "norecovery" /* don't run XFS recovery */
1646 #define MNTOPT_BARRIER "barrier" /* use writer barriers for log write and
1647 * unwritten extent conversion */
1648 #define MNTOPT_NOBARRIER "nobarrier" /* .. disable */
1649 #define MNTOPT_OSYNCISOSYNC "osyncisosync" /* o_sync is REALLY o_sync */
1650 #define MNTOPT_64BITINODE "inode64" /* inodes can be allocated anywhere */
1651 #define MNTOPT_IKEEP "ikeep" /* do not free empty inode clusters */
1652 #define MNTOPT_NOIKEEP "noikeep" /* free empty inode clusters */
1653 #define MNTOPT_LARGEIO "largeio" /* report large I/O sizes in stat() */
1654 #define MNTOPT_NOLARGEIO "nolargeio" /* do not report large I/O sizes
1655 * in stat(). */
1656 #define MNTOPT_ATTR2 "attr2" /* do use attr2 attribute format */
1657 #define MNTOPT_NOATTR2 "noattr2" /* do not use attr2 attribute format */
1658
1659 STATIC unsigned long
1660 suffix_strtoul(const char *cp, char **endp, unsigned int base)
1661 {
1662 int last, shift_left_factor = 0;
1663 char *value = (char *)cp;
1664
1665 last = strlen(value) - 1;
1666 if (value[last] == 'K' || value[last] == 'k') {
1667 shift_left_factor = 10;
1668 value[last] = '\0';
1669 }
1670 if (value[last] == 'M' || value[last] == 'm') {
1671 shift_left_factor = 20;
1672 value[last] = '\0';
1673 }
1674 if (value[last] == 'G' || value[last] == 'g') {
1675 shift_left_factor = 30;
1676 value[last] = '\0';
1677 }
1678
1679 return simple_strtoul(cp, endp, base) << shift_left_factor;
1680 }
1681
1682 STATIC int
1683 xfs_parseargs(
1684 struct bhv_desc *bhv,
1685 char *options,
1686 struct xfs_mount_args *args,
1687 int update)
1688 {
1689 struct vfs *vfsp = bhvtovfs(bhv);
1690 char *this_char, *value, *eov;
1691 int dsunit, dswidth, vol_dsunit, vol_dswidth;
1692 int iosize;
1693
1694 args->flags |= XFSMNT_IDELETE;
1695 args->flags |= XFSMNT_BARRIER;
1696 args->flags2 |= XFSMNT2_COMPAT_IOSIZE;
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 { 0, NULL }
1907 };
1908 struct proc_xfs_info *xfs_infop;
1909 struct xfs_mount *mp = XFS_BHVTOM(bhv);
1910 struct vfs *vfsp = XFS_MTOVFS(mp);
1911
1912 for (xfs_infop = xfs_info; xfs_infop->flag; xfs_infop++) {
1913 if (mp->m_flags & xfs_infop->flag)
1914 seq_puts(m, xfs_infop->str);
1915 }
1916
1917 if (mp->m_flags & XFS_MOUNT_IHASHSIZE)
1918 seq_printf(m, "," MNTOPT_IHASHSIZE "=%d", mp->m_ihsize);
1919
1920 if (mp->m_flags & XFS_MOUNT_DFLT_IOSIZE)
1921 seq_printf(m, "," MNTOPT_ALLOCSIZE "=%dk",
1922 (int)(1 << mp->m_writeio_log) >> 10);
1923
1924 if (mp->m_logbufs > 0)
1925 seq_printf(m, "," MNTOPT_LOGBUFS "=%d", mp->m_logbufs);
1926 if (mp->m_logbsize > 0)
1927 seq_printf(m, "," MNTOPT_LOGBSIZE "=%dk", mp->m_logbsize >> 10);
1928
1929 if (mp->m_logname)
1930 seq_printf(m, "," MNTOPT_LOGDEV "=%s", mp->m_logname);
1931 if (mp->m_rtname)
1932 seq_printf(m, "," MNTOPT_RTDEV "=%s", mp->m_rtname);
1933
1934 if (mp->m_dalign > 0)
1935 seq_printf(m, "," MNTOPT_SUNIT "=%d",
1936 (int)XFS_FSB_TO_BB(mp, mp->m_dalign));
1937 if (mp->m_swidth > 0)
1938 seq_printf(m, "," MNTOPT_SWIDTH "=%d",
1939 (int)XFS_FSB_TO_BB(mp, mp->m_swidth));
1940
1941 if (!(mp->m_flags & XFS_MOUNT_IDELETE))
1942 seq_printf(m, "," MNTOPT_IKEEP);
1943 if (!(mp->m_flags & XFS_MOUNT_COMPAT_IOSIZE))
1944 seq_printf(m, "," MNTOPT_LARGEIO);
1945
1946 if (!(vfsp->vfs_flag & VFS_32BITINODES))
1947 seq_printf(m, "," MNTOPT_64BITINODE);
1948 if (vfsp->vfs_flag & VFS_GRPID)
1949 seq_printf(m, "," MNTOPT_GRPID);
1950
1951 return 0;
1952 }
1953
1954 STATIC void
1955 xfs_freeze(
1956 bhv_desc_t *bdp)
1957 {
1958 xfs_mount_t *mp = XFS_BHVTOM(bdp);
1959
1960 while (atomic_read(&mp->m_active_trans) > 0)
1961 delay(100);
1962
1963 /* Push the superblock and write an unmount record */
1964 xfs_log_unmount_write(mp);
1965 xfs_unmountfs_writesb(mp);
1966 xfs_fs_log_dummy(mp);
1967 }
1968
1969
1970 vfsops_t xfs_vfsops = {
1971 BHV_IDENTITY_INIT(VFS_BHV_XFS,VFS_POSITION_XFS),
1972 .vfs_parseargs = xfs_parseargs,
1973 .vfs_showargs = xfs_showargs,
1974 .vfs_mount = xfs_mount,
1975 .vfs_unmount = xfs_unmount,
1976 .vfs_mntupdate = xfs_mntupdate,
1977 .vfs_root = xfs_root,
1978 .vfs_statvfs = xfs_statvfs,
1979 .vfs_sync = xfs_sync,
1980 .vfs_vget = xfs_vget,
1981 .vfs_dmapiops = (vfs_dmapiops_t)fs_nosys,
1982 .vfs_quotactl = (vfs_quotactl_t)fs_nosys,
1983 .vfs_init_vnode = xfs_initialize_vnode,
1984 .vfs_force_shutdown = xfs_do_force_shutdown,
1985 .vfs_freeze = xfs_freeze,
1986 };
Linux with added FPC-III support