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root/src/trunk/sys/gnu/fs/xfs/xfs_vfsops.c
Revision: 8022
Committed: Thu Sep 15 20:16:58 2016 UTC (7 years, 7 months ago) by laffer1
Content type: text/plain
File size: 54403 byte(s)
Log Message: 
work around several warnings from clang in XFS.

File Contents

# Content
1 /* $MidnightBSD$ */
2 /*
3 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
4 * All Rights Reserved.
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License as
8 * published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope that it would be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
18 */
19 #include "xfs.h"
20 #include "xfs_fs.h"
21 #include "xfs_types.h"
22 #include "xfs_bit.h"
23 #include "xfs_log.h"
24 #include "xfs_inum.h"
25 #include "xfs_trans.h"
26 #include "xfs_sb.h"
27 #include "xfs_ag.h"
28 #include "xfs_dir.h"
29 #include "xfs_dir2.h"
30 #include "xfs_dmapi.h"
31 #include "xfs_mount.h"
32 #include "xfs_da_btree.h"
33 #include "xfs_bmap_btree.h"
34 #include "xfs_ialloc_btree.h"
35 #include "xfs_alloc_btree.h"
36 #include "xfs_dir_sf.h"
37 #include "xfs_dir2_sf.h"
38 #include "xfs_attr_sf.h"
39 #include "xfs_dinode.h"
40 #include "xfs_inode.h"
41 #include "xfs_inode_item.h"
42 #include "xfs_btree.h"
43 #include "xfs_alloc.h"
44 #include "xfs_ialloc.h"
45 #include "xfs_quota.h"
46 #include "xfs_error.h"
47 #include "xfs_bmap.h"
48 #include "xfs_rw.h"
49 #include "xfs_refcache.h"
50 #include "xfs_buf_item.h"
51 #include "xfs_log_priv.h"
52 #include "xfs_dir2_trace.h"
53 #include "xfs_extfree_item.h"
54 #include "xfs_acl.h"
55 #include "xfs_attr.h"
56 #include "xfs_clnt.h"
57 #include "xfs_fsops.h"
58 #include "xfs_vnode.h"
59
60 STATIC int xfs_sync(bhv_desc_t *, int, cred_t *);
61
62 extern kmem_zone_t *xfs_bmap_free_item_zone;
63 extern kmem_zone_t *xfs_btree_cur_zone;
64 extern kmem_zone_t *xfs_trans_zone;
65 extern kmem_zone_t *xfs_dabuf_zone;
66 extern kmem_zone_t *xfs_buf_item_zone;
67
68 #ifdef XFS_DABUF_DEBUG
69 extern lock_t xfs_dabuf_global_lock;
70 #endif
71
72 int
73 xfs_init(void)
74 {
75 #if 0
76 extern kmem_zone_t *xfs_bmap_free_item_zone;
77 extern kmem_zone_t *xfs_btree_cur_zone;
78 extern kmem_zone_t *xfs_trans_zone;
79 extern kmem_zone_t *xfs_buf_item_zone;
80 extern kmem_zone_t *xfs_dabuf_zone;
81 #endif
82 #ifdef XFS_DABUF_DEBUG
83 spinlock_init(&xfs_dabuf_global_lock, "xfsda");
84 #endif
85 /*
86 * Initialize all of the zone allocators we use.
87 */
88 xfs_bmap_free_item_zone = kmem_zone_init(sizeof(xfs_bmap_free_item_t),
89 "xfs_bmap_free_item");
90 xfs_btree_cur_zone = kmem_zone_init(sizeof(xfs_btree_cur_t),
91 "xfs_btree_cur");
92 xfs_trans_zone = kmem_zone_init(sizeof(xfs_trans_t), "xfs_trans");
93 xfs_da_state_zone =
94 kmem_zone_init(sizeof(xfs_da_state_t), "xfs_da_state");
95 xfs_dabuf_zone = kmem_zone_init(sizeof(xfs_dabuf_t), "xfs_dabuf");
96 xfs_ifork_zone = kmem_zone_init(sizeof(xfs_ifork_t), "xfs_ifork");
97 xfs_acl_zone_init(xfs_acl_zone, "xfs_acl");
98
99 /*
100 * The size of the zone allocated buf log item is the maximum
101 * size possible under XFS. This wastes a little bit of memory,
102 * but it is much faster.
103 */
104 xfs_buf_item_zone =
105 kmem_zone_init((sizeof(xfs_buf_log_item_t) +
106 (((XFS_MAX_BLOCKSIZE / XFS_BLI_CHUNK) /
107 NBWORD) * sizeof(int))),
108 "xfs_buf_item");
109 xfs_efd_zone =
110 kmem_zone_init((sizeof(xfs_efd_log_item_t) +
111 ((XFS_EFD_MAX_FAST_EXTENTS - 1) *
112 sizeof(xfs_extent_t))),
113 "xfs_efd_item");
114 xfs_efi_zone =
115 kmem_zone_init((sizeof(xfs_efi_log_item_t) +
116 ((XFS_EFI_MAX_FAST_EXTENTS - 1) *
117 sizeof(xfs_extent_t))),
118 "xfs_efi_item");
119
120 /*
121 * These zones warrant special memory allocator hints
122 */
123 xfs_inode_zone =
124 kmem_zone_init_flags(sizeof(xfs_inode_t), "xfs_inode",
125 KM_ZONE_HWALIGN | KM_ZONE_RECLAIM |
126 KM_ZONE_SPREAD, NULL);
127 xfs_ili_zone =
128 kmem_zone_init_flags(sizeof(xfs_inode_log_item_t), "xfs_ili",
129 KM_ZONE_SPREAD, NULL);
130 xfs_chashlist_zone =
131 kmem_zone_init_flags(sizeof(xfs_chashlist_t), "xfs_chashlist",
132 KM_ZONE_SPREAD, NULL);
133
134 /*
135 * Allocate global trace buffers.
136 */
137 #ifdef XFS_ALLOC_TRACE
138 xfs_alloc_trace_buf = ktrace_alloc(XFS_ALLOC_TRACE_SIZE, KM_SLEEP);
139 #endif
140 #ifdef XFS_BMAP_TRACE
141 xfs_bmap_trace_buf = ktrace_alloc(XFS_BMAP_TRACE_SIZE, KM_SLEEP);
142 #endif
143 #ifdef XFS_BMBT_TRACE
144 xfs_bmbt_trace_buf = ktrace_alloc(XFS_BMBT_TRACE_SIZE, KM_SLEEP);
145 #endif
146 #ifdef XFS_DIR_TRACE
147 xfs_dir_trace_buf = ktrace_alloc(XFS_DIR_TRACE_SIZE, KM_SLEEP);
148 #endif
149 #ifdef XFS_ATTR_TRACE
150 xfs_attr_trace_buf = ktrace_alloc(XFS_ATTR_TRACE_SIZE, KM_SLEEP);
151 #endif
152 #ifdef XFS_DIR2_TRACE
153 xfs_dir2_trace_buf = ktrace_alloc(XFS_DIR2_GTRACE_SIZE, KM_SLEEP);
154 #endif
155
156 xfs_dir_startup();
157
158 #if (defined(DEBUG) || defined(INDUCE_IO_ERROR))
159 xfs_error_test_init();
160 #endif /* DEBUG || INDUCE_IO_ERROR */
161
162 xfs_refcache_init();
163 xfs_init_procfs();
164 xfs_sysctl_register();
165 return 0;
166 }
167
168 void
169 xfs_cleanup(void)
170 {
171 #if 0
172 extern kmem_zone_t *xfs_bmap_free_item_zone;
173 extern kmem_zone_t *xfs_btree_cur_zone;
174 extern kmem_zone_t *xfs_inode_zone;
175 extern kmem_zone_t *xfs_trans_zone;
176 extern kmem_zone_t *xfs_da_state_zone;
177 extern kmem_zone_t *xfs_dabuf_zone;
178 extern kmem_zone_t *xfs_efd_zone;
179 extern kmem_zone_t *xfs_efi_zone;
180 extern kmem_zone_t *xfs_buf_item_zone;
181 extern kmem_zone_t *xfs_chashlist_zone;
182 #endif
183
184 xfs_cleanup_procfs();
185 xfs_sysctl_unregister();
186 xfs_refcache_destroy();
187 xfs_acl_zone_destroy(xfs_acl_zone);
188
189 #ifdef XFS_DIR2_TRACE
190 ktrace_free(xfs_dir2_trace_buf);
191 #endif
192 #ifdef XFS_ATTR_TRACE
193 ktrace_free(xfs_attr_trace_buf);
194 #endif
195 #ifdef XFS_DIR_TRACE
196 ktrace_free(xfs_dir_trace_buf);
197 #endif
198 #ifdef XFS_BMBT_TRACE
199 ktrace_free(xfs_bmbt_trace_buf);
200 #endif
201 #ifdef XFS_BMAP_TRACE
202 ktrace_free(xfs_bmap_trace_buf);
203 #endif
204 #ifdef XFS_ALLOC_TRACE
205 ktrace_free(xfs_alloc_trace_buf);
206 #endif
207
208 kmem_zone_destroy(xfs_bmap_free_item_zone);
209 kmem_zone_destroy(xfs_btree_cur_zone);
210 kmem_zone_destroy(xfs_inode_zone);
211 kmem_zone_destroy(xfs_trans_zone);
212 kmem_zone_destroy(xfs_da_state_zone);
213 kmem_zone_destroy(xfs_dabuf_zone);
214 kmem_zone_destroy(xfs_buf_item_zone);
215 kmem_zone_destroy(xfs_efd_zone);
216 kmem_zone_destroy(xfs_efi_zone);
217 kmem_zone_destroy(xfs_ifork_zone);
218 kmem_zone_destroy(xfs_ili_zone);
219 kmem_zone_destroy(xfs_chashlist_zone);
220 }
221
222 /*
223 * xfs_start_flags
224 *
225 * This function fills in xfs_mount_t fields based on mount args.
226 * Note: the superblock has _not_ yet been read in.
227 */
228 STATIC int
229 xfs_start_flags(
230 struct xfs_vfs *vfs,
231 struct xfs_mount_args *ap,
232 struct xfs_mount *mp)
233 {
234 /* Values are in BBs */
235 if ((ap->flags & XFSMNT_NOALIGN) != XFSMNT_NOALIGN) {
236 /*
237 * At this point the superblock has not been read
238 * in, therefore we do not know the block size.
239 * Before the mount call ends we will convert
240 * these to FSBs.
241 */
242 mp->m_dalign = ap->sunit;
243 mp->m_swidth = ap->swidth;
244 }
245
246 if (ap->logbufs != -1 &&
247 ap->logbufs != 0 &&
248 (ap->logbufs < XLOG_MIN_ICLOGS ||
249 ap->logbufs > XLOG_MAX_ICLOGS)) {
250 cmn_err(CE_WARN,
251 "XFS: invalid logbufs value: %d [not %d-%d]",
252 ap->logbufs, XLOG_MIN_ICLOGS, XLOG_MAX_ICLOGS);
253 return XFS_ERROR(EINVAL);
254 }
255 mp->m_logbufs = ap->logbufs;
256 if (ap->logbufsize != -1 &&
257 ap->logbufsize != 0 &&
258 ap->logbufsize != 16 * 1024 &&
259 ap->logbufsize != 32 * 1024 &&
260 ap->logbufsize != 64 * 1024 &&
261 ap->logbufsize != 128 * 1024 &&
262 ap->logbufsize != 256 * 1024) {
263 cmn_err(CE_WARN,
264 "XFS: invalid logbufsize: %d [not 16k,32k,64k,128k or 256k]",
265 ap->logbufsize);
266 return XFS_ERROR(EINVAL);
267 }
268 mp->m_ihsize = ap->ihashsize;
269 mp->m_logbsize = ap->logbufsize;
270 mp->m_fsname_len = strlen(ap->fsname) + 1;
271 mp->m_fsname = kmem_alloc(mp->m_fsname_len, KM_SLEEP);
272 strcpy(mp->m_fsname, ap->fsname);
273 if (ap->rtname[0]) {
274 mp->m_rtname = kmem_alloc(strlen(ap->rtname) + 1, KM_SLEEP);
275 strcpy(mp->m_rtname, ap->rtname);
276 }
277 if (ap->logname[0]) {
278 mp->m_logname = kmem_alloc(strlen(ap->logname) + 1, KM_SLEEP);
279 strcpy(mp->m_logname, ap->logname);
280 }
281
282 if (ap->flags & XFSMNT_WSYNC)
283 mp->m_flags |= XFS_MOUNT_WSYNC;
284 #if XFS_BIG_INUMS
285 if (ap->flags & XFSMNT_INO64) {
286 mp->m_flags |= XFS_MOUNT_INO64;
287 mp->m_inoadd = XFS_INO64_OFFSET;
288 }
289 #endif
290 if (ap->flags & XFSMNT_RETERR)
291 mp->m_flags |= XFS_MOUNT_RETERR;
292 if (ap->flags & XFSMNT_NOALIGN)
293 mp->m_flags |= XFS_MOUNT_NOALIGN;
294 if (ap->flags & XFSMNT_SWALLOC)
295 mp->m_flags |= XFS_MOUNT_SWALLOC;
296 if (ap->flags & XFSMNT_OSYNCISOSYNC)
297 mp->m_flags |= XFS_MOUNT_OSYNCISOSYNC;
298 if (ap->flags & XFSMNT_32BITINODES)
299 mp->m_flags |= XFS_MOUNT_32BITINODES;
300
301 if (ap->flags & XFSMNT_IOSIZE) {
302 if (ap->iosizelog > XFS_MAX_IO_LOG ||
303 ap->iosizelog < XFS_MIN_IO_LOG) {
304 cmn_err(CE_WARN,
305 "XFS: invalid log iosize: %d [not %d-%d]",
306 ap->iosizelog, XFS_MIN_IO_LOG,
307 XFS_MAX_IO_LOG);
308 return XFS_ERROR(EINVAL);
309 }
310
311 mp->m_flags |= XFS_MOUNT_DFLT_IOSIZE;
312 mp->m_readio_log = mp->m_writeio_log = ap->iosizelog;
313 }
314
315 if (ap->flags & XFSMNT_IHASHSIZE)
316 mp->m_flags |= XFS_MOUNT_IHASHSIZE;
317 if (ap->flags & XFSMNT_IDELETE)
318 mp->m_flags |= XFS_MOUNT_IDELETE;
319 if (ap->flags & XFSMNT_DIRSYNC)
320 mp->m_flags |= XFS_MOUNT_DIRSYNC;
321 if (ap->flags & XFSMNT_ATTR2)
322 mp->m_flags |= XFS_MOUNT_ATTR2;
323
324 if (ap->flags2 & XFSMNT2_COMPAT_IOSIZE)
325 mp->m_flags |= XFS_MOUNT_COMPAT_IOSIZE;
326
327 /*
328 * no recovery flag requires a read-only mount
329 */
330 if (ap->flags & XFSMNT_NORECOVERY) {
331 if (!(vfs->vfs_flag & VFS_RDONLY)) {
332 cmn_err(CE_WARN,
333 "XFS: tried to mount a FS read-write without recovery!");
334 return XFS_ERROR(EINVAL);
335 }
336 mp->m_flags |= XFS_MOUNT_NORECOVERY;
337 }
338
339 if (ap->flags & XFSMNT_NOUUID)
340 mp->m_flags |= XFS_MOUNT_NOUUID;
341 if (ap->flags & XFSMNT_BARRIER)
342 mp->m_flags |= XFS_MOUNT_BARRIER;
343 else
344 mp->m_flags &= ~XFS_MOUNT_BARRIER;
345
346 return 0;
347 }
348
349 /*
350 * This function fills in xfs_mount_t fields based on mount args.
351 * Note: the superblock _has_ now been read in.
352 */
353 STATIC int
354 xfs_finish_flags(
355 struct xfs_vfs *vfs,
356 struct xfs_mount_args *ap,
357 struct xfs_mount *mp)
358 {
359 int ronly = (vfs->vfs_flag & VFS_RDONLY);
360
361 /* Fail a mount where the logbuf is smaller then the log stripe */
362 if (XFS_SB_VERSION_HASLOGV2(&mp->m_sb)) {
363 if ((ap->logbufsize <= 0) &&
364 (mp->m_sb.sb_logsunit > XLOG_BIG_RECORD_BSIZE)) {
365 mp->m_logbsize = mp->m_sb.sb_logsunit;
366 } else if (ap->logbufsize > 0 &&
367 ap->logbufsize < mp->m_sb.sb_logsunit) {
368 cmn_err(CE_WARN,
369 "XFS: logbuf size must be greater than or equal to log stripe size");
370 return XFS_ERROR(EINVAL);
371 }
372 } else {
373 /* Fail a mount if the logbuf is larger than 32K */
374 if (ap->logbufsize > XLOG_BIG_RECORD_BSIZE) {
375 cmn_err(CE_WARN,
376 "XFS: logbuf size for version 1 logs must be 16K or 32K");
377 return XFS_ERROR(EINVAL);
378 }
379 }
380
381 if (XFS_SB_VERSION_HASATTR2(&mp->m_sb)) {
382 mp->m_flags |= XFS_MOUNT_ATTR2;
383 }
384
385 /*
386 * prohibit r/w mounts of read-only filesystems
387 */
388 if ((mp->m_sb.sb_flags & XFS_SBF_READONLY) && !ronly) {
389 cmn_err(CE_WARN,
390 "XFS: cannot mount a read-only filesystem as read-write");
391 return XFS_ERROR(EROFS);
392 }
393
394 /*
395 * check for shared mount.
396 */
397 if (ap->flags & XFSMNT_SHARED) {
398 if (!XFS_SB_VERSION_HASSHARED(&mp->m_sb))
399 return XFS_ERROR(EINVAL);
400
401 /*
402 * For IRIX 6.5, shared mounts must have the shared
403 * version bit set, have the persistent readonly
404 * field set, must be version 0 and can only be mounted
405 * read-only.
406 */
407 if (!ronly || !(mp->m_sb.sb_flags & XFS_SBF_READONLY) ||
408 (mp->m_sb.sb_shared_vn != 0))
409 return XFS_ERROR(EINVAL);
410
411 mp->m_flags |= XFS_MOUNT_SHARED;
412
413 /*
414 * Shared XFS V0 can't deal with DMI. Return EINVAL.
415 */
416 if (mp->m_sb.sb_shared_vn == 0 && (ap->flags & XFSMNT_DMAPI))
417 return XFS_ERROR(EINVAL);
418 }
419
420 return 0;
421 }
422
423 /*
424 * xfs_mount
425 *
426 * The file system configurations are:
427 * (1) device (partition) with data and internal log
428 * (2) logical volume with data and log subvolumes.
429 * (3) logical volume with data, log, and realtime subvolumes.
430 *
431 * We only have to handle opening the log and realtime volumes here if
432 * they are present. The data subvolume has already been opened by
433 * get_sb_bdev() and is stored in vfsp->vfs_super->s_bdev.
434 */
435 STATIC int
436 xfs_mount(
437 struct bhv_desc *bhvp,
438 struct xfs_mount_args *args,
439 cred_t *credp)
440 {
441 struct xfs_vfs *vfsp = bhvtovfs(bhvp);
442 struct bhv_desc *p;
443 struct xfs_mount *mp = XFS_BHVTOM(bhvp);
444 struct vnode *ddev, *logdev, *rtdev;
445 int flags = 0, error;
446
447 ddev = logdev = rtdev = NULL;
448
449 error = xfs_blkdev_get(mp, args->fsname, &ddev);
450 if (error)
451 return error;
452
453 /*
454 * Setup xfs_mount function vectors from available behaviors
455 */
456 p = vfs_bhv_lookup(vfsp, VFS_POSITION_DM);
457 mp->m_dm_ops = p ? *(xfs_dmops_t *) vfs_bhv_custom(p) : xfs_dmcore_stub;
458 p = vfs_bhv_lookup(vfsp, VFS_POSITION_QM);
459 mp->m_qm_ops = p ? *(xfs_qmops_t *) vfs_bhv_custom(p) : xfs_qmcore_stub;
460 p = vfs_bhv_lookup(vfsp, VFS_POSITION_IO);
461 mp->m_io_ops = p ? *(xfs_ioops_t *) vfs_bhv_custom(p) : xfs_iocore_xfs;
462
463 if (args->flags & XFSMNT_QUIET)
464 flags |= XFS_MFSI_QUIET;
465
466 /*
467 * Open real time and log devices - order is important.
468 */
469 if (args->logname[0]) {
470 error = xfs_blkdev_get(mp, args->logname, &logdev);
471 if (error) {
472 xfs_blkdev_put(ddev);
473 return error;
474 }
475 }
476 if (args->rtname[0]) {
477 error = xfs_blkdev_get(mp, args->rtname, &rtdev);
478 if (error) {
479 xfs_blkdev_put(logdev);
480 xfs_blkdev_put(ddev);
481 return error;
482 }
483
484 if (rtdev == ddev || rtdev == logdev) {
485 cmn_err(CE_WARN,
486 "XFS: Cannot mount filesystem with identical rtdev and ddev/logdev.");
487 xfs_blkdev_put(logdev);
488 xfs_blkdev_put(rtdev);
489 xfs_blkdev_put(ddev);
490 return EINVAL;
491 }
492 }
493
494 /*
495 * Setup xfs_mount buffer target pointers
496 */
497 error = ENOMEM;
498 mp->m_ddev_targp = xfs_alloc_buftarg(ddev, 0);
499 if (!mp->m_ddev_targp) {
500 xfs_blkdev_put(logdev);
501 xfs_blkdev_put(rtdev);
502 return error;
503 }
504 if (rtdev) {
505 mp->m_rtdev_targp = xfs_alloc_buftarg(rtdev, 1);
506 if (!mp->m_rtdev_targp)
507 goto error0;
508 }
509 mp->m_logdev_targp = (logdev && logdev != ddev) ?
510 xfs_alloc_buftarg(logdev, 1) : mp->m_ddev_targp;
511 if (!mp->m_logdev_targp)
512 goto error0;
513
514 /*
515 * Setup flags based on mount(2) options and then the superblock
516 */
517 error = xfs_start_flags(vfsp, args, mp);
518 if (error)
519 goto error1;
520 error = xfs_readsb(mp, flags);
521 if (error)
522 goto error1;
523 error = xfs_finish_flags(vfsp, args, mp);
524 if (error)
525 goto error2;
526
527 /*
528 * Setup xfs_mount buffer target pointers based on superblock
529 */
530 error = xfs_setsize_buftarg(mp->m_ddev_targp, mp->m_sb.sb_blocksize,
531 mp->m_sb.sb_sectsize);
532 if (!error && logdev && logdev != ddev) {
533 unsigned int log_sector_size = BBSIZE;
534
535 if (XFS_SB_VERSION_HASSECTOR(&mp->m_sb))
536 log_sector_size = mp->m_sb.sb_logsectsize;
537 error = xfs_setsize_buftarg(mp->m_logdev_targp,
538 mp->m_sb.sb_blocksize,
539 log_sector_size);
540 }
541 if (!error && rtdev)
542 error = xfs_setsize_buftarg(mp->m_rtdev_targp,
543 mp->m_sb.sb_blocksize,
544 mp->m_sb.sb_sectsize);
545 if (error)
546 goto error2;
547
548 if ((mp->m_flags & XFS_MOUNT_BARRIER) && !(vfsp->vfs_flag & VFS_RDONLY))
549 xfs_mountfs_check_barriers(mp);
550
551 error = XFS_IOINIT(vfsp, args, flags);
552 if (error)
553 goto error2;
554
555 return 0;
556
557 error2:
558 if (mp->m_sb_bp)
559 xfs_freesb(mp);
560 error1:
561 xfs_binval(mp->m_ddev_targp);
562 if (logdev && logdev != ddev)
563 xfs_binval(mp->m_logdev_targp);
564 if (rtdev)
565 xfs_binval(mp->m_rtdev_targp);
566 error0:
567 xfs_unmountfs_close(mp, credp);
568 return error;
569 }
570
571 STATIC int
572 xfs_unmount(
573 bhv_desc_t *bdp,
574 int flags,
575 cred_t *credp)
576 {
577 struct xfs_vfs *vfsp = bhvtovfs(bdp);
578 xfs_mount_t *mp = XFS_BHVTOM(bdp);
579 xfs_inode_t *rip;
580 xfs_vnode_t *rvp;
581 int unmount_event_wanted = 0;
582 int unmount_event_flags = 0;
583 int xfs_unmountfs_needed = 0;
584 int error;
585
586 rip = mp->m_rootip;
587 rvp = XFS_ITOV(rip);
588
589 if (vfsp->vfs_flag & VFS_DMI) {
590 error = XFS_SEND_PREUNMOUNT(mp, vfsp,
591 rvp, DM_RIGHT_NULL, rvp, DM_RIGHT_NULL,
592 NULL, NULL, 0, 0,
593 (mp->m_dmevmask & (1<<DM_EVENT_PREUNMOUNT))?
594 0:DM_FLAGS_UNWANTED);
595 if (error)
596 return XFS_ERROR(error);
597 unmount_event_wanted = 1;
598 unmount_event_flags = (mp->m_dmevmask & (1<<DM_EVENT_UNMOUNT))?
599 0 : DM_FLAGS_UNWANTED;
600 }
601
602 /*
603 * Linux (& presumably Irix) do not reach this code if
604 * any of this FS vnodes have active references. FreeBSD
605 * relies on FS to clean after itself.
606 */
607 xfs_iflush_all(mp);
608
609 /*
610 * First blow any referenced inode from this file system
611 * out of the reference cache, and delete the timer.
612 */
613 xfs_refcache_purge_mp(mp);
614
615 XFS_bflush(mp->m_ddev_targp);
616 error = xfs_unmount_flush(mp, 0);
617 if (error)
618 goto out;
619
620 ASSERT(vn_count(rvp) == 1);
621
622 /*
623 * Drop the reference count
624 */
625 VN_RELE(rvp);
626
627 /*
628 * If we're forcing a shutdown, typically because of a media error,
629 * we want to make sure we invalidate dirty pages that belong to
630 * referenced vnodes as well.
631 */
632 if (XFS_FORCED_SHUTDOWN(mp)) {
633 error = xfs_sync(&mp->m_bhv,
634 (SYNC_WAIT | SYNC_CLOSE), credp);
635 ASSERT(error != EFSCORRUPTED);
636 }
637 xfs_unmountfs_needed = 1;
638
639 out:
640 /* Send DMAPI event, if required.
641 * Then do xfs_unmountfs() if needed.
642 * Then return error (or zero).
643 */
644 if (unmount_event_wanted) {
645 /* Note: mp structure must still exist for
646 * XFS_SEND_UNMOUNT() call.
647 */
648 XFS_SEND_UNMOUNT(mp, vfsp, error == 0 ? rvp : NULL,
649 DM_RIGHT_NULL, 0, error, unmount_event_flags);
650 }
651 if (xfs_unmountfs_needed) {
652 /*
653 * Call common unmount function to flush to disk
654 * and free the super block buffer & mount structures.
655 */
656 xfs_unmountfs(mp, credp);
657 }
658
659 return XFS_ERROR(error);
660 }
661
662 STATIC int
663 xfs_quiesce_fs(
664 xfs_mount_t *mp)
665 {
666 int count = 0, pincount;
667
668 xfs_refcache_purge_mp(mp);
669 xfs_flush_buftarg(mp->m_ddev_targp, 0);
670 xfs_finish_reclaim_all(mp, 0);
671
672 /* This loop must run at least twice.
673 * The first instance of the loop will flush
674 * most meta data but that will generate more
675 * meta data (typically directory updates).
676 * Which then must be flushed and logged before
677 * we can write the unmount record.
678 */
679 do {
680 xfs_syncsub(mp, SYNC_REMOUNT|SYNC_ATTR|SYNC_WAIT, 0, NULL);
681 pincount = xfs_flush_buftarg(mp->m_ddev_targp, 1);
682 if (!pincount) {
683 delay(50);
684 count++;
685 }
686 } while (count < 2);
687
688 return 0;
689 }
690
691 /* XXXKAN */
692 #define pagebuf_delwri_flush(a,b,c) \
693 do { \
694 printf("pagebuf_delwri_flush NI\n"); \
695 if (c) *((int *)(c)) = 0; \
696 } while(0)
697
698 STATIC int
699 xfs_mntupdate(
700 bhv_desc_t *bdp,
701 int *flags,
702 struct xfs_mount_args *args)
703 {
704 struct xfs_vfs *vfsp = bhvtovfs(bdp);
705 xfs_mount_t *mp = XFS_BHVTOM(bdp);
706 int error;
707
708 #ifdef RMC
709 if (!(*flags & MS_RDONLY)) { /* rw/ro -> rw */
710 #endif
711 if (!(*flags & VFS_RDONLY)) { /* rw/ro -> rw */
712 if (vfsp->vfs_flag & VFS_RDONLY)
713 vfsp->vfs_flag &= ~VFS_RDONLY;
714 if (args->flags & XFSMNT_BARRIER) {
715 mp->m_flags |= XFS_MOUNT_BARRIER;
716 xfs_mountfs_check_barriers(mp);
717 } else {
718 mp->m_flags &= ~XFS_MOUNT_BARRIER;
719 }
720 } else if (!(vfsp->vfs_flag & VFS_RDONLY)) { /* rw -> ro */
721 XVFS_SYNC(vfsp, SYNC_FSDATA|SYNC_BDFLUSH|SYNC_ATTR, NULL, error);
722 xfs_quiesce_fs(mp);
723 xfs_log_unmount_write(mp);
724 xfs_unmountfs_writesb(mp);
725 vfsp->vfs_flag |= VFS_RDONLY;
726 }
727 return 0;
728 }
729
730 /*
731 * xfs_unmount_flush implements a set of flush operation on special
732 * inodes, which are needed as a separate set of operations so that
733 * they can be called as part of relocation process.
734 */
735 int
736 xfs_unmount_flush(
737 xfs_mount_t *mp, /* Mount structure we are getting
738 rid of. */
739 int relocation) /* Called from vfs relocation. */
740 {
741 xfs_inode_t *rip = mp->m_rootip;
742 xfs_inode_t *rbmip;
743 xfs_inode_t *rsumip = NULL;
744 xfs_vnode_t *rvp = XFS_ITOV_NULL(rip);
745 int error;
746
747 if (rvp == NULL)
748 return (0);
749 xfs_ilock(rip, XFS_ILOCK_EXCL);
750 xfs_iflock(rip);
751
752 /*
753 * Flush out the real time inodes.
754 */
755 if ((rbmip = mp->m_rbmip) != NULL) {
756 xfs_ilock(rbmip, XFS_ILOCK_EXCL);
757 xfs_iflock(rbmip);
758 error = xfs_iflush(rbmip, XFS_IFLUSH_SYNC);
759 xfs_iunlock(rbmip, XFS_ILOCK_EXCL);
760
761 if (error == EFSCORRUPTED)
762 goto fscorrupt_out;
763
764 ASSERT(vn_count(XFS_ITOV(rbmip)) == 1);
765
766 rsumip = mp->m_rsumip;
767 xfs_ilock(rsumip, XFS_ILOCK_EXCL);
768 xfs_iflock(rsumip);
769 error = xfs_iflush(rsumip, XFS_IFLUSH_SYNC);
770 xfs_iunlock(rsumip, XFS_ILOCK_EXCL);
771
772 if (error == EFSCORRUPTED)
773 goto fscorrupt_out;
774
775 ASSERT(vn_count(XFS_ITOV(rsumip)) == 1);
776 }
777
778 /*
779 * Synchronously flush root inode to disk
780 */
781 error = xfs_iflush(rip, XFS_IFLUSH_SYNC);
782 if (error == EFSCORRUPTED)
783 goto fscorrupt_out2;
784
785 if (vn_count(rvp) != 1 && !relocation) {
786 xfs_iunlock(rip, XFS_ILOCK_EXCL);
787 return XFS_ERROR(EBUSY);
788 }
789
790 /*
791 * Release dquot that rootinode, rbmino and rsumino might be holding,
792 * flush and purge the quota inodes.
793 */
794 error = XFS_QM_UNMOUNT(mp);
795 if (error == EFSCORRUPTED)
796 goto fscorrupt_out2;
797
798 if (rbmip) {
799 VN_RELE(XFS_ITOV(rbmip));
800 VN_RELE(XFS_ITOV(rsumip));
801 }
802
803 xfs_iunlock(rip, XFS_ILOCK_EXCL);
804 return 0;
805
806 fscorrupt_out:
807 xfs_ifunlock(rip);
808
809 fscorrupt_out2:
810 xfs_iunlock(rip, XFS_ILOCK_EXCL);
811
812 return XFS_ERROR(EFSCORRUPTED);
813 }
814
815 /*
816 * xfs_root extracts the root vnode from a vfs.
817 *
818 * vfsp -- the vfs struct for the desired file system
819 * vpp -- address of the caller's vnode pointer which should be
820 * set to the desired fs root vnode
821 */
822 STATIC int
823 xfs_root(
824 bhv_desc_t *bdp,
825 xfs_vnode_t **vpp)
826 {
827 xfs_vnode_t *vp;
828
829 vp = XFS_ITOV((XFS_BHVTOM(bdp))->m_rootip);
830 VN_HOLD(vp);
831 *vpp = vp;
832 return 0;
833 }
834
835 /*
836 * xfs_statvfs
837 *
838 * Fill in the statvfs structure for the given file system. We use
839 * the superblock lock in the mount structure to ensure a consistent
840 * snapshot of the counters returned.
841 */
842 STATIC int
843 xfs_statvfs(
844 bhv_desc_t *bdp,
845 xfs_statfs_t *statp,
846 xfs_vnode_t *vp)
847 {
848 __uint64_t fakeinos;
849 xfs_extlen_t lsize;
850 xfs_mount_t *mp;
851 xfs_sb_t *sbp;
852 unsigned long s;
853
854 mp = XFS_BHVTOM(bdp);
855 sbp = &(mp->m_sb);
856
857 statp->f_type = XFS_SB_MAGIC;
858
859 xfs_icsb_sync_counters_lazy(mp);
860 s = XFS_SB_LOCK(mp);
861 statp->f_bsize = sbp->sb_blocksize;
862 lsize = sbp->sb_logstart ? sbp->sb_logblocks : 0;
863 statp->f_blocks = sbp->sb_dblocks - lsize;
864 statp->f_bfree = statp->f_bavail = sbp->sb_fdblocks;
865 fakeinos = statp->f_bfree << sbp->sb_inopblog;
866 #if XFS_BIG_INUMS
867 fakeinos += mp->m_inoadd;
868 #endif
869 statp->f_files =
870 MIN(sbp->sb_icount + fakeinos, (__uint64_t)XFS_MAXINUMBER);
871 if (mp->m_maxicount)
872 #if XFS_BIG_INUMS
873 if (!mp->m_inoadd)
874 #endif
875 statp->f_files = min_t(typeof(statp->f_files),
876 statp->f_files,
877 mp->m_maxicount);
878 statp->f_ffree = statp->f_files - (sbp->sb_icount - sbp->sb_ifree);
879 XFS_SB_UNLOCK(mp, s);
880
881 xfs_statvfs_fsid(statp, mp);
882 return 0;
883 }
884
885
886 /*
887 * xfs_sync flushes any pending I/O to file system vfsp.
888 *
889 * This routine is called by vfs_sync() to make sure that things make it
890 * out to disk eventually, on sync() system calls to flush out everything,
891 * and when the file system is unmounted. For the vfs_sync() case, all
892 * we really need to do is sync out the log to make all of our meta-data
893 * updates permanent (except for timestamps). For calls from pflushd(),
894 * dirty pages are kept moving by calling pdflush() on the inodes
895 * containing them. We also flush the inodes that we can lock without
896 * sleeping and the superblock if we can lock it without sleeping from
897 * vfs_sync() so that items at the tail of the log are always moving out.
898 *
899 * Flags:
900 * SYNC_BDFLUSH - We're being called from vfs_sync() so we don't want
901 * to sleep if we can help it. All we really need
902 * to do is ensure that the log is synced at least
903 * periodically. We also push the inodes and
904 * superblock if we can lock them without sleeping
905 * and they are not pinned.
906 * SYNC_ATTR - We need to flush the inodes. If SYNC_BDFLUSH is not
907 * set, then we really want to lock each inode and flush
908 * it.
909 * SYNC_WAIT - All the flushes that take place in this call should
910 * be synchronous.
911 * SYNC_DELWRI - This tells us to push dirty pages associated with
912 * inodes. SYNC_WAIT and SYNC_BDFLUSH are used to
913 * determine if they should be flushed sync, async, or
914 * delwri.
915 * SYNC_CLOSE - This flag is passed when the system is being
916 * unmounted. We should sync and invalidate everything.
917 * SYNC_FSDATA - This indicates that the caller would like to make
918 * sure the superblock is safe on disk. We can ensure
919 * this by simply making sure the log gets flushed
920 * if SYNC_BDFLUSH is set, and by actually writing it
921 * out otherwise.
922 *
923 */
924 /*ARGSUSED*/
925 STATIC int
926 xfs_sync(
927 bhv_desc_t *bdp,
928 int flags,
929 cred_t *credp)
930 {
931 xfs_mount_t *mp = XFS_BHVTOM(bdp);
932
933 if (unlikely(flags == SYNC_QUIESCE))
934 return xfs_quiesce_fs(mp);
935 else
936 return xfs_syncsub(mp, flags, 0, NULL);
937 }
938
939 /*
940 * xfs sync routine for internal use
941 *
942 * This routine supports all of the flags defined for the generic VFS_SYNC
943 * interface as explained above under xfs_sync. In the interests of not
944 * changing interfaces within the 6.5 family, additional internally-
945 * required functions are specified within a separate xflags parameter,
946 * only available by calling this routine.
947 *
948 */
949 int
950 xfs_sync_inodes(
951 xfs_mount_t *mp,
952 int flags,
953 int xflags,
954 int *bypassed)
955 {
956 xfs_inode_t *ip = NULL;
957 xfs_inode_t *ip_next;
958 xfs_buf_t *bp;
959 xfs_vnode_t *vp = NULL;
960 int error;
961 int last_error;
962 uint64_t fflag;
963 uint lock_flags;
964 uint base_lock_flags;
965 boolean_t mount_locked;
966 boolean_t vnode_refed;
967 int preempt;
968 xfs_dinode_t *dip;
969 xfs_iptr_t *ipointer;
970 #ifdef DEBUG
971 boolean_t ipointer_in = B_FALSE;
972
973 #define IPOINTER_SET ipointer_in = B_TRUE
974 #define IPOINTER_CLR ipointer_in = B_FALSE
975 #else
976 #define IPOINTER_SET
977 #define IPOINTER_CLR
978 #endif
979
980
981 /* Insert a marker record into the inode list after inode ip. The list
982 * must be locked when this is called. After the call the list will no
983 * longer be locked.
984 */
985 #define IPOINTER_INSERT(ip, mp) { \
986 ASSERT(ipointer_in == B_FALSE); \
987 ipointer->ip_mnext = ip->i_mnext; \
988 ipointer->ip_mprev = ip; \
989 ip->i_mnext = (xfs_inode_t *)ipointer; \
990 ipointer->ip_mnext->i_mprev = (xfs_inode_t *)ipointer; \
991 preempt = 0; \
992 XFS_MOUNT_IUNLOCK(mp); \
993 mount_locked = B_FALSE; \
994 IPOINTER_SET; \
995 }
996
997 /* Remove the marker from the inode list. If the marker was the only item
998 * in the list then there are no remaining inodes and we should zero out
999 * the whole list. If we are the current head of the list then move the head
1000 * past us.
1001 */
1002 #define IPOINTER_REMOVE(ip, mp) { \
1003 ASSERT(ipointer_in == B_TRUE); \
1004 if (ipointer->ip_mnext != (xfs_inode_t *)ipointer) { \
1005 ip = ipointer->ip_mnext; \
1006 ip->i_mprev = ipointer->ip_mprev; \
1007 ipointer->ip_mprev->i_mnext = ip; \
1008 if (mp->m_inodes == (xfs_inode_t *)ipointer) { \
1009 mp->m_inodes = ip; \
1010 } \
1011 } else { \
1012 ASSERT(mp->m_inodes == (xfs_inode_t *)ipointer); \
1013 mp->m_inodes = NULL; \
1014 ip = NULL; \
1015 } \
1016 IPOINTER_CLR; \
1017 }
1018
1019 #define XFS_PREEMPT_MASK 0x7f
1020
1021 if (bypassed)
1022 *bypassed = 0;
1023 if (XFS_MTOVFS(mp)->vfs_flag & VFS_RDONLY)
1024 return 0;
1025 error = 0;
1026 last_error = 0;
1027 preempt = 0;
1028
1029 /* Allocate a reference marker */
1030 ipointer = (xfs_iptr_t *)kmem_zalloc(sizeof(xfs_iptr_t), KM_SLEEP);
1031
1032 fflag = XFS_B_ASYNC; /* default is don't wait */
1033 if (flags & (SYNC_BDFLUSH | SYNC_DELWRI))
1034 fflag = XFS_B_DELWRI;
1035 if (flags & SYNC_WAIT)
1036 fflag = 0; /* synchronous overrides all */
1037
1038 base_lock_flags = XFS_ILOCK_SHARED;
1039 if (flags & (SYNC_DELWRI | SYNC_CLOSE)) {
1040 /*
1041 * We need the I/O lock if we're going to call any of
1042 * the flush/inval routines.
1043 */
1044 base_lock_flags |= XFS_IOLOCK_SHARED;
1045 }
1046
1047 XFS_MOUNT_ILOCK(mp);
1048
1049 ip = mp->m_inodes;
1050
1051 mount_locked = B_TRUE;
1052 vnode_refed = B_FALSE;
1053
1054 IPOINTER_CLR;
1055
1056 do {
1057 ASSERT(ipointer_in == B_FALSE);
1058 ASSERT(vnode_refed == B_FALSE);
1059
1060 lock_flags = base_lock_flags;
1061
1062 /*
1063 * There were no inodes in the list, just break out
1064 * of the loop.
1065 */
1066 if (ip == NULL) {
1067 break;
1068 }
1069
1070 /*
1071 * We found another sync thread marker - skip it
1072 */
1073 if (ip->i_mount == NULL) {
1074 ip = ip->i_mnext;
1075 continue;
1076 }
1077
1078 vp = XFS_ITOV_NULL(ip);
1079
1080 /*
1081 * If the vnode is gone then this is being torn down,
1082 * call reclaim if it is flushed, else let regular flush
1083 * code deal with it later in the loop.
1084 */
1085
1086 if (vp == NULL) {
1087 /* Skip ones already in reclaim */
1088 if (ip->i_flags & XFS_IRECLAIM) {
1089 ip = ip->i_mnext;
1090 continue;
1091 }
1092 if (xfs_ilock_nowait(ip, XFS_ILOCK_EXCL) == 0) {
1093 ip = ip->i_mnext;
1094 } else if ((xfs_ipincount(ip) == 0) &&
1095 xfs_iflock_nowait(ip)) {
1096 IPOINTER_INSERT(ip, mp);
1097
1098 xfs_finish_reclaim(ip, 1,
1099 XFS_IFLUSH_DELWRI_ELSE_ASYNC);
1100
1101 XFS_MOUNT_ILOCK(mp);
1102 mount_locked = B_TRUE;
1103 IPOINTER_REMOVE(ip, mp);
1104 } else {
1105 xfs_iunlock(ip, XFS_ILOCK_EXCL);
1106 ip = ip->i_mnext;
1107 }
1108 continue;
1109 }
1110
1111 if (VN_BAD(vp)) {
1112 ip = ip->i_mnext;
1113 continue;
1114 }
1115
1116 if (XFS_FORCED_SHUTDOWN(mp) && !(flags & SYNC_CLOSE)) {
1117 XFS_MOUNT_IUNLOCK(mp);
1118 kmem_free(ipointer, sizeof(xfs_iptr_t));
1119 return 0;
1120 }
1121
1122 /*
1123 * If this is just vfs_sync() or pflushd() calling
1124 * then we can skip inodes for which it looks like
1125 * there is nothing to do. Since we don't have the
1126 * inode locked this is racy, but these are periodic
1127 * calls so it doesn't matter. For the others we want
1128 * to know for sure, so we at least try to lock them.
1129 */
1130 if (flags & SYNC_BDFLUSH) {
1131 if (((ip->i_itemp == NULL) ||
1132 !(ip->i_itemp->ili_format.ilf_fields &
1133 XFS_ILOG_ALL)) &&
1134 (ip->i_update_core == 0)) {
1135 ip = ip->i_mnext;
1136 continue;
1137 }
1138 }
1139
1140 /*
1141 * Try to lock without sleeping. We're out of order with
1142 * the inode list lock here, so if we fail we need to drop
1143 * the mount lock and try again. If we're called from
1144 * bdflush() here, then don't bother.
1145 *
1146 * The inode lock here actually coordinates with the
1147 * almost spurious inode lock in xfs_ireclaim() to prevent
1148 * the vnode we handle here without a reference from
1149 * being freed while we reference it. If we lock the inode
1150 * while it's on the mount list here, then the spurious inode
1151 * lock in xfs_ireclaim() after the inode is pulled from
1152 * the mount list will sleep until we release it here.
1153 * This keeps the vnode from being freed while we reference
1154 * it.
1155 */
1156 if (xfs_ilock_nowait(ip, lock_flags) == 0) {
1157 if ((flags & SYNC_BDFLUSH) || (vp == NULL)) {
1158 ip = ip->i_mnext;
1159 continue;
1160 }
1161
1162 vp = vn_grab(vp);
1163 if (vp == NULL) {
1164 ip = ip->i_mnext;
1165 continue;
1166 }
1167
1168 IPOINTER_INSERT(ip, mp);
1169 xfs_ilock(ip, lock_flags);
1170
1171 ASSERT(vp == XFS_ITOV(ip));
1172 ASSERT(ip->i_mount == mp);
1173
1174 vnode_refed = B_TRUE;
1175 }
1176
1177 /* From here on in the loop we may have a marker record
1178 * in the inode list.
1179 */
1180
1181 if ((flags & SYNC_CLOSE) && (vp != NULL)) {
1182 /*
1183 * This is the shutdown case. We just need to
1184 * flush and invalidate all the pages associated
1185 * with the inode. Drop the inode lock since
1186 * we can't hold it across calls to the buffer
1187 * cache.
1188 *
1189 * We don't set the VREMAPPING bit in the vnode
1190 * here, because we don't hold the vnode lock
1191 * exclusively. It doesn't really matter, though,
1192 * because we only come here when we're shutting
1193 * down anyway.
1194 */
1195 xfs_iunlock(ip, XFS_ILOCK_SHARED);
1196
1197 if (XFS_FORCED_SHUTDOWN(mp)) {
1198 XVOP_TOSS_PAGES(vp, 0, -1, FI_REMAPF);
1199 } else {
1200 XVOP_FLUSHINVAL_PAGES(vp, 0, -1, FI_REMAPF);
1201 }
1202
1203 xfs_ilock(ip, XFS_ILOCK_SHARED);
1204
1205 } else if ((flags & SYNC_DELWRI) && (vp != NULL)) {
1206 if (VN_DIRTY(vp)) {
1207 /* We need to have dropped the lock here,
1208 * so insert a marker if we have not already
1209 * done so.
1210 */
1211 if (mount_locked) {
1212 IPOINTER_INSERT(ip, mp);
1213 }
1214
1215 /*
1216 * Drop the inode lock since we can't hold it
1217 * across calls to the buffer cache.
1218 */
1219 xfs_iunlock(ip, XFS_ILOCK_SHARED);
1220 XVOP_FLUSH_PAGES(vp, (xfs_off_t)0, -1,
1221 fflag, FI_NONE, error);
1222 xfs_ilock(ip, XFS_ILOCK_SHARED);
1223 }
1224
1225 }
1226
1227 if (flags & SYNC_BDFLUSH) {
1228 if ((flags & SYNC_ATTR) &&
1229 ((ip->i_update_core) ||
1230 ((ip->i_itemp != NULL) &&
1231 (ip->i_itemp->ili_format.ilf_fields != 0)))) {
1232
1233 /* Insert marker and drop lock if not already
1234 * done.
1235 */
1236 if (mount_locked) {
1237 IPOINTER_INSERT(ip, mp);
1238 }
1239
1240 /*
1241 * We don't want the periodic flushing of the
1242 * inodes by vfs_sync() to interfere with
1243 * I/O to the file, especially read I/O
1244 * where it is only the access time stamp
1245 * that is being flushed out. To prevent
1246 * long periods where we have both inode
1247 * locks held shared here while reading the
1248 * inode's buffer in from disk, we drop the
1249 * inode lock while reading in the inode
1250 * buffer. We have to release the buffer
1251 * and reacquire the inode lock so that they
1252 * are acquired in the proper order (inode
1253 * locks first). The buffer will go at the
1254 * end of the lru chain, though, so we can
1255 * expect it to still be there when we go
1256 * for it again in xfs_iflush().
1257 */
1258 if ((xfs_ipincount(ip) == 0) &&
1259 xfs_iflock_nowait(ip)) {
1260
1261 xfs_ifunlock(ip);
1262 xfs_iunlock(ip, XFS_ILOCK_SHARED);
1263
1264 error = xfs_itobp(mp, NULL, ip,
1265 &dip, &bp, 0, 0);
1266 if (!error) {
1267 xfs_buf_relse(bp);
1268 } else {
1269 /* Bailing out, remove the
1270 * marker and free it.
1271 */
1272 XFS_MOUNT_ILOCK(mp);
1273
1274 IPOINTER_REMOVE(ip, mp);
1275
1276 XFS_MOUNT_IUNLOCK(mp);
1277
1278 ASSERT(!(lock_flags &
1279 XFS_IOLOCK_SHARED));
1280
1281 kmem_free(ipointer,
1282 sizeof(xfs_iptr_t));
1283 return (0);
1284 }
1285
1286 /*
1287 * Since we dropped the inode lock,
1288 * the inode may have been reclaimed.
1289 * Therefore, we reacquire the mount
1290 * lock and check to see if we were the
1291 * inode reclaimed. If this happened
1292 * then the ipointer marker will no
1293 * longer point back at us. In this
1294 * case, move ip along to the inode
1295 * after the marker, remove the marker
1296 * and continue.
1297 */
1298 XFS_MOUNT_ILOCK(mp);
1299 mount_locked = B_TRUE;
1300
1301 if (ip != ipointer->ip_mprev) {
1302 IPOINTER_REMOVE(ip, mp);
1303
1304 ASSERT(!vnode_refed);
1305 ASSERT(!(lock_flags &
1306 XFS_IOLOCK_SHARED));
1307 continue;
1308 }
1309
1310 ASSERT(ip->i_mount == mp);
1311
1312 if (xfs_ilock_nowait(ip,
1313 XFS_ILOCK_SHARED) == 0) {
1314 ASSERT(ip->i_mount == mp);
1315 /*
1316 * We failed to reacquire
1317 * the inode lock without
1318 * sleeping, so just skip
1319 * the inode for now. We
1320 * clear the ILOCK bit from
1321 * the lock_flags so that we
1322 * won't try to drop a lock
1323 * we don't hold below.
1324 */
1325 lock_flags &= ~XFS_ILOCK_SHARED;
1326 IPOINTER_REMOVE(ip_next, mp);
1327 } else if ((xfs_ipincount(ip) == 0) &&
1328 xfs_iflock_nowait(ip)) {
1329 ASSERT(ip->i_mount == mp);
1330 /*
1331 * Since this is vfs_sync()
1332 * calling we only flush the
1333 * inode out if we can lock
1334 * it without sleeping and
1335 * it is not pinned. Drop
1336 * the mount lock here so
1337 * that we don't hold it for
1338 * too long. We already have
1339 * a marker in the list here.
1340 */
1341 XFS_MOUNT_IUNLOCK(mp);
1342 mount_locked = B_FALSE;
1343 error = xfs_iflush(ip,
1344 XFS_IFLUSH_DELWRI);
1345 } else {
1346 ASSERT(ip->i_mount == mp);
1347 IPOINTER_REMOVE(ip_next, mp);
1348 }
1349 }
1350
1351 }
1352
1353 } else {
1354 if ((flags & SYNC_ATTR) &&
1355 ((ip->i_update_core) ||
1356 ((ip->i_itemp != NULL) &&
1357 (ip->i_itemp->ili_format.ilf_fields != 0)))) {
1358 if (mount_locked) {
1359 IPOINTER_INSERT(ip, mp);
1360 }
1361
1362 if (flags & SYNC_WAIT) {
1363 xfs_iflock(ip);
1364 error = xfs_iflush(ip,
1365 XFS_IFLUSH_SYNC);
1366 } else {
1367 /*
1368 * If we can't acquire the flush
1369 * lock, then the inode is already
1370 * being flushed so don't bother
1371 * waiting. If we can lock it then
1372 * do a delwri flush so we can
1373 * combine multiple inode flushes
1374 * in each disk write.
1375 */
1376 if (xfs_iflock_nowait(ip)) {
1377 error = xfs_iflush(ip,
1378 XFS_IFLUSH_DELWRI);
1379 }
1380 else if (bypassed)
1381 (*bypassed)++;
1382 }
1383 }
1384 }
1385
1386 if (lock_flags != 0) {
1387 xfs_iunlock(ip, lock_flags);
1388 }
1389
1390 if (vnode_refed) {
1391 /*
1392 * If we had to take a reference on the vnode
1393 * above, then wait until after we've unlocked
1394 * the inode to release the reference. This is
1395 * because we can be already holding the inode
1396 * lock when VN_RELE() calls xfs_inactive().
1397 *
1398 * Make sure to drop the mount lock before calling
1399 * VN_RELE() so that we don't trip over ourselves if
1400 * we have to go for the mount lock again in the
1401 * inactive code.
1402 */
1403 if (mount_locked) {
1404 IPOINTER_INSERT(ip, mp);
1405 }
1406
1407 VN_RELE(vp);
1408
1409 vnode_refed = B_FALSE;
1410 }
1411
1412 if (error) {
1413 last_error = error;
1414 }
1415
1416 /*
1417 * bail out if the filesystem is corrupted.
1418 */
1419 if (error == EFSCORRUPTED) {
1420 if (!mount_locked) {
1421 XFS_MOUNT_ILOCK(mp);
1422 IPOINTER_REMOVE(ip, mp);
1423 }
1424 XFS_MOUNT_IUNLOCK(mp);
1425 ASSERT(ipointer_in == B_FALSE);
1426 kmem_free(ipointer, sizeof(xfs_iptr_t));
1427 return XFS_ERROR(error);
1428 }
1429
1430 /* Let other threads have a chance at the mount lock
1431 * if we have looped many times without dropping the
1432 * lock.
1433 */
1434 if ((++preempt & XFS_PREEMPT_MASK) == 0) {
1435 if (mount_locked) {
1436 IPOINTER_INSERT(ip, mp);
1437 }
1438 }
1439
1440 if (mount_locked == B_FALSE) {
1441 XFS_MOUNT_ILOCK(mp);
1442 mount_locked = B_TRUE;
1443 IPOINTER_REMOVE(ip, mp);
1444 continue;
1445 }
1446
1447 ASSERT(ipointer_in == B_FALSE);
1448 ip = ip->i_mnext;
1449
1450 } while (ip != mp->m_inodes);
1451
1452 XFS_MOUNT_IUNLOCK(mp);
1453
1454 ASSERT(ipointer_in == B_FALSE);
1455
1456 kmem_free(ipointer, sizeof(xfs_iptr_t));
1457 return XFS_ERROR(last_error);
1458 }
1459
1460 /*
1461 * xfs sync routine for internal use
1462 *
1463 * This routine supports all of the flags defined for the generic VFS_SYNC
1464 * interface as explained above under xfs_sync. In the interests of not
1465 * changing interfaces within the 6.5 family, additional internally-
1466 * required functions are specified within a separate xflags parameter,
1467 * only available by calling this routine.
1468 *
1469 */
1470 int
1471 xfs_syncsub(
1472 xfs_mount_t *mp,
1473 int flags,
1474 int xflags,
1475 int *bypassed)
1476 {
1477 int error = 0;
1478 int last_error = 0;
1479 uint log_flags = XFS_LOG_FORCE;
1480 xfs_buf_t *bp;
1481 xfs_buf_log_item_t *bip;
1482
1483 /*
1484 * Sync out the log. This ensures that the log is periodically
1485 * flushed even if there is not enough activity to fill it up.
1486 */
1487 if (flags & SYNC_WAIT)
1488 log_flags |= XFS_LOG_SYNC;
1489
1490 xfs_log_force(mp, (xfs_lsn_t)0, log_flags);
1491
1492 if (flags & (SYNC_ATTR|SYNC_DELWRI)) {
1493 if (flags & SYNC_BDFLUSH)
1494 xfs_finish_reclaim_all(mp, 1);
1495 else
1496 error = xfs_sync_inodes(mp, flags, xflags, bypassed);
1497 }
1498
1499 /*
1500 * Flushing out dirty data above probably generated more
1501 * log activity, so if this isn't vfs_sync() then flush
1502 * the log again.
1503 */
1504 if (flags & SYNC_DELWRI) {
1505 xfs_log_force(mp, (xfs_lsn_t)0, log_flags);
1506 }
1507
1508 if (flags & SYNC_FSDATA) {
1509 /*
1510 * If this is vfs_sync() then only sync the superblock
1511 * if we can lock it without sleeping and it is not pinned.
1512 */
1513 if (flags & SYNC_BDFLUSH) {
1514 bp = xfs_getsb(mp, XFS_BUF_TRYLOCK);
1515 if (bp != NULL) {
1516 bip = XFS_BUF_FSPRIVATE(bp,xfs_buf_log_item_t*);
1517 if ((bip != NULL) &&
1518 xfs_buf_item_dirty(bip)) {
1519 if (!(XFS_BUF_ISPINNED(bp))) {
1520 XFS_BUF_ASYNC(bp);
1521 error = xfs_bwrite(mp, bp);
1522 } else {
1523 xfs_buf_relse(bp);
1524 }
1525 } else {
1526 xfs_buf_relse(bp);
1527 }
1528 }
1529 } else {
1530 bp = xfs_getsb(mp, 0);
1531 /*
1532 * If the buffer is pinned then push on the log so
1533 * we won't get stuck waiting in the write for
1534 * someone, maybe ourselves, to flush the log.
1535 * Even though we just pushed the log above, we
1536 * did not have the superblock buffer locked at
1537 * that point so it can become pinned in between
1538 * there and here.
1539 */
1540 if (XFS_BUF_ISPINNED(bp))
1541 xfs_log_force(mp, (xfs_lsn_t)0, XFS_LOG_FORCE);
1542 if (flags & SYNC_WAIT)
1543 XFS_BUF_UNASYNC(bp);
1544 else
1545 XFS_BUF_ASYNC(bp);
1546 error = xfs_bwrite(mp, bp);
1547 }
1548 if (error) {
1549 last_error = error;
1550 }
1551 }
1552
1553 /*
1554 * If this is the periodic sync, then kick some entries out of
1555 * the reference cache. This ensures that idle entries are
1556 * eventually kicked out of the cache.
1557 */
1558 if (flags & SYNC_REFCACHE) {
1559 if (flags & SYNC_WAIT)
1560 xfs_refcache_purge_mp(mp);
1561 else
1562 xfs_refcache_purge_some(mp);
1563 }
1564
1565 /*
1566 * Now check to see if the log needs a "dummy" transaction.
1567 */
1568
1569 if (!(flags & SYNC_REMOUNT) && xfs_log_need_covered(mp)) {
1570 xfs_trans_t *tp;
1571 xfs_inode_t *ip;
1572
1573 /*
1574 * Put a dummy transaction in the log to tell
1575 * recovery that all others are OK.
1576 */
1577 tp = xfs_trans_alloc(mp, XFS_TRANS_DUMMY1);
1578 if ((error = xfs_trans_reserve(tp, 0,
1579 XFS_ICHANGE_LOG_RES(mp),
1580 0, 0, 0))) {
1581 xfs_trans_cancel(tp, 0);
1582 return error;
1583 }
1584
1585 ip = mp->m_rootip;
1586 xfs_ilock(ip, XFS_ILOCK_EXCL);
1587
1588 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
1589 xfs_trans_ihold(tp, ip);
1590 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1591 error = xfs_trans_commit(tp, 0, NULL);
1592 xfs_iunlock(ip, XFS_ILOCK_EXCL);
1593 xfs_log_force(mp, (xfs_lsn_t)0, log_flags);
1594 }
1595
1596 /*
1597 * When shutting down, we need to insure that the AIL is pushed
1598 * to disk or the filesystem can appear corrupt from the PROM.
1599 */
1600 if ((flags & (SYNC_CLOSE|SYNC_WAIT)) == (SYNC_CLOSE|SYNC_WAIT)) {
1601 XFS_bflush(mp->m_ddev_targp);
1602 if (mp->m_rtdev_targp) {
1603 XFS_bflush(mp->m_rtdev_targp);
1604 }
1605 }
1606
1607 return XFS_ERROR(last_error);
1608 }
1609
1610 /*
1611 * xfs_vget - called by DMAPI and NFSD to get vnode from file handle
1612 */
1613 STATIC int
1614 xfs_vget(
1615 bhv_desc_t *bdp,
1616 xfs_vnode_t **vpp,
1617 fid_t *fidp)
1618 {
1619 xfs_mount_t *mp = XFS_BHVTOM(bdp);
1620 xfs_fid_t *xfid = (struct xfs_fid *)fidp;
1621 xfs_inode_t *ip;
1622 int error;
1623 xfs_ino_t ino;
1624 unsigned int igen;
1625
1626 /*
1627 * Invalid. Since handles can be created in user space and passed in
1628 * via gethandle(), this is not cause for a panic.
1629 */
1630 if (xfid->xfs_fid_len != sizeof(*xfid) - sizeof(xfid->xfs_fid_len))
1631 return XFS_ERROR(EINVAL);
1632
1633 ino = xfid->xfs_fid_ino;
1634 igen = xfid->xfs_fid_gen;
1635
1636 /*
1637 * NFS can sometimes send requests for ino 0. Fail them gracefully.
1638 */
1639 if (ino == 0)
1640 return XFS_ERROR(ESTALE);
1641
1642 error = xfs_iget(mp, NULL, ino, 0, XFS_ILOCK_SHARED, &ip, 0);
1643 if (error) {
1644 *vpp = NULL;
1645 return error;
1646 }
1647
1648 if (ip == NULL) {
1649 *vpp = NULL;
1650 return XFS_ERROR(EIO);
1651 }
1652
1653 if (ip->i_d.di_mode == 0 || ip->i_d.di_gen != igen) {
1654 xfs_iput_new(ip, XFS_ILOCK_SHARED);
1655 *vpp = NULL;
1656 return XFS_ERROR(ENOENT);
1657 }
1658
1659 *vpp = XFS_ITOV(ip);
1660 xfs_iunlock(ip, XFS_ILOCK_SHARED);
1661 return 0;
1662 }
1663
1664
1665 #define MNTOPT_LOGBUFS "logbufs" /* number of XFS log buffers */
1666 #define MNTOPT_LOGBSIZE "logbsize" /* size of XFS log buffers */
1667 #define MNTOPT_LOGDEV "logdev" /* log device */
1668 #define MNTOPT_RTDEV "rtdev" /* realtime I/O device */
1669 #define MNTOPT_BIOSIZE "biosize" /* log2 of preferred buffered io size */
1670 #define MNTOPT_WSYNC "wsync" /* safe-mode nfs compatible mount */
1671 #define MNTOPT_INO64 "ino64" /* force inodes into 64-bit range */
1672 #define MNTOPT_NOALIGN "noalign" /* turn off stripe alignment */
1673 #define MNTOPT_SWALLOC "swalloc" /* turn on stripe width allocation */
1674 #define MNTOPT_SUNIT "sunit" /* data volume stripe unit */
1675 #define MNTOPT_SWIDTH "swidth" /* data volume stripe width */
1676 #define MNTOPT_NOUUID "nouuid" /* ignore filesystem UUID */
1677 #define MNTOPT_MTPT "mtpt" /* filesystem mount point */
1678 #define MNTOPT_GRPID "grpid" /* group-ID from parent directory */
1679 #define MNTOPT_NOGRPID "nogrpid" /* group-ID from current process */
1680 #define MNTOPT_BSDGROUPS "bsdgroups" /* group-ID from parent directory */
1681 #define MNTOPT_SYSVGROUPS "sysvgroups" /* group-ID from current process */
1682 #define MNTOPT_ALLOCSIZE "allocsize" /* preferred allocation size */
1683 #define MNTOPT_IHASHSIZE "ihashsize" /* size of inode hash table */
1684 #define MNTOPT_NORECOVERY "norecovery" /* don't run XFS recovery */
1685 #define MNTOPT_BARRIER "barrier" /* use writer barriers for log write and
1686 * unwritten extent conversion */
1687 #define MNTOPT_NOBARRIER "nobarrier" /* .. disable */
1688 #define MNTOPT_OSYNCISOSYNC "osyncisosync" /* o_sync is REALLY o_sync */
1689 #define MNTOPT_64BITINODE "inode64" /* inodes can be allocated anywhere */
1690 #define MNTOPT_IKEEP "ikeep" /* do not free empty inode clusters */
1691 #define MNTOPT_NOIKEEP "noikeep" /* free empty inode clusters */
1692 #define MNTOPT_LARGEIO "largeio" /* report large I/O sizes in stat() */
1693 #define MNTOPT_NOLARGEIO "nolargeio" /* do not report large I/O sizes
1694 * in stat(). */
1695 #define MNTOPT_ATTR2 "attr2" /* do use attr2 attribute format */
1696 #define MNTOPT_NOATTR2 "noattr2" /* do not use attr2 attribute format */
1697 #define simple_strtoul strtoul
1698
1699 STATIC unsigned long
1700 suffix_strtoul(char *cp, char **endp, unsigned int base)
1701 {
1702 int last, shift_left_factor = 0;
1703 char *value = (char *)cp;
1704
1705 last = strlen(value) - 1;
1706 if (value[last] == 'K' || value[last] == 'k') {
1707 shift_left_factor = 10;
1708 value[last] = '\0';
1709 }
1710 if (value[last] == 'M' || value[last] == 'm') {
1711 shift_left_factor = 20;
1712 value[last] = '\0';
1713 }
1714 if (value[last] == 'G' || value[last] == 'g') {
1715 shift_left_factor = 30;
1716 value[last] = '\0';
1717 }
1718
1719 return simple_strtoul(cp, endp, base) << shift_left_factor;
1720 }
1721
1722
1723 STATIC int
1724 xfs_parseargs(
1725 struct bhv_desc *bhv,
1726 char *options,
1727 struct xfs_mount_args *args,
1728 int update)
1729 {
1730 struct xfs_vfs *vfsp = bhvtovfs(bhv);
1731 char *this_char, *value, *eov;
1732 int dsunit, dswidth, vol_dsunit, vol_dswidth;
1733 int iosize;
1734
1735 args->flags |= XFSMNT_IDELETE;
1736 args->flags |= XFSMNT_BARRIER;
1737 args->flags2 |= XFSMNT2_COMPAT_IOSIZE;
1738
1739 if (!options)
1740 goto done;
1741
1742 iosize = dsunit = dswidth = vol_dsunit = vol_dswidth = 0;
1743
1744 while ((this_char = strsep(&options, ",")) != NULL) {
1745 if (!*this_char)
1746 continue;
1747
1748 if ((value = index(this_char, '=')) != NULL)
1749 *value++ = 0;
1750
1751 if (!strcmp(this_char, MNTOPT_LOGBUFS)) {
1752 if (!value || !*value) {
1753 printf("XFS: %s option requires an argument\n",
1754 this_char);
1755 return EINVAL;
1756 }
1757 args->logbufs = simple_strtoul(value, &eov, 10);
1758 } else if (!strcmp(this_char, MNTOPT_LOGBSIZE)) {
1759 if (!value || !*value) {
1760 printf("XFS: %s option requires an argument\n",
1761 this_char);
1762 return EINVAL;
1763 }
1764 args->logbufsize = suffix_strtoul(value, &eov, 10);
1765 } else if (!strcmp(this_char, MNTOPT_LOGDEV)) {
1766 if (!value || !*value) {
1767 printf("XFS: %s option requires an argument\n",
1768 this_char);
1769 return EINVAL;
1770 }
1771 strncpy(args->logname, value, MAXNAMELEN);
1772 } else if (!strcmp(this_char, MNTOPT_MTPT)) {
1773 if (!value || !*value) {
1774 printf("XFS: %s option requires an argument\n",
1775 this_char);
1776 return EINVAL;
1777 }
1778 strncpy(args->mtpt, value, MAXNAMELEN);
1779 } else if (!strcmp(this_char, MNTOPT_RTDEV)) {
1780 if (!value || !*value) {
1781 printf("XFS: %s option requires an argument\n",
1782 this_char);
1783 return EINVAL;
1784 }
1785 strncpy(args->rtname, value, MAXNAMELEN);
1786 } else if (!strcmp(this_char, MNTOPT_BIOSIZE)) {
1787 if (!value || !*value) {
1788 printf("XFS: %s option requires an argument\n",
1789 this_char);
1790 return EINVAL;
1791 }
1792 iosize = simple_strtoul(value, &eov, 10);
1793 args->flags |= XFSMNT_IOSIZE;
1794 args->iosizelog = (uint8_t) iosize;
1795 } else if (!strcmp(this_char, MNTOPT_ALLOCSIZE)) {
1796 if (!value || !*value) {
1797 printk("XFS: %s option requires an argument\n",
1798 this_char);
1799 return EINVAL;
1800 }
1801 iosize = suffix_strtoul(value, &eov, 10);
1802 args->flags |= XFSMNT_IOSIZE;
1803 args->iosizelog = ffs(iosize) - 1;
1804 } else if (!strcmp(this_char, MNTOPT_IHASHSIZE)) {
1805 if (!value || !*value) {
1806 printk("XFS: %s option requires an argument\n",
1807 this_char);
1808 return EINVAL;
1809 }
1810 args->flags |= XFSMNT_IHASHSIZE;
1811 args->ihashsize = simple_strtoul(value, &eov, 10);
1812 } else if (!strcmp(this_char, MNTOPT_GRPID) ||
1813 !strcmp(this_char, MNTOPT_BSDGROUPS)) {
1814 vfsp->vfs_flag |= VFS_GRPID;
1815 } else if (!strcmp(this_char, MNTOPT_NOGRPID) ||
1816 !strcmp(this_char, MNTOPT_SYSVGROUPS)) {
1817 vfsp->vfs_flag &= ~VFS_GRPID;
1818 } else if (!strcmp(this_char, MNTOPT_WSYNC)) {
1819 args->flags |= XFSMNT_WSYNC;
1820 } else if (!strcmp(this_char, MNTOPT_OSYNCISOSYNC)) {
1821 args->flags |= XFSMNT_OSYNCISOSYNC;
1822 } else if (!strcmp(this_char, MNTOPT_NORECOVERY)) {
1823 args->flags |= XFSMNT_NORECOVERY;
1824 } else if (!strcmp(this_char, MNTOPT_INO64)) {
1825 args->flags |= XFSMNT_INO64;
1826 #if !XFS_BIG_INUMS
1827
1828 printf("XFS: %s option not allowed on this system\n",
1829 this_char);
1830 return EINVAL;
1831 #endif
1832 } else if (!strcmp(this_char, MNTOPT_NOALIGN)) {
1833 args->flags |= XFSMNT_NOALIGN;
1834 } else if (!strcmp(this_char, MNTOPT_SWALLOC)) {
1835 args->flags |= XFSMNT_SWALLOC;
1836 } else if (!strcmp(this_char, MNTOPT_SUNIT)) {
1837 if (!value || !*value) {
1838 printf("XFS: %s option requires an argument\n",
1839 this_char);
1840 return EINVAL;
1841 }
1842 dsunit = simple_strtoul(value, &eov, 10);
1843 } else if (!strcmp(this_char, MNTOPT_SWIDTH)) {
1844 if (!value || !*value) {
1845 printf("XFS: %s option requires an argument\n",
1846 this_char);
1847 return EINVAL;
1848 }
1849 dswidth = simple_strtoul(value, &eov, 10);
1850 } else if (!strcmp(this_char, MNTOPT_64BITINODE)) {
1851 args->flags &= ~XFSMNT_32BITINODES;
1852 #if !XFS_BIG_INUMS
1853
1854 printf("XFS: %s option not allowed on this system\n",
1855 this_char);
1856 return EINVAL;
1857 #endif
1858 } else if (!strcmp(this_char, MNTOPT_NOUUID)) {
1859 args->flags |= XFSMNT_NOUUID;
1860 } else if (!strcmp(this_char, MNTOPT_BARRIER)) {
1861 args->flags |= XFSMNT_BARRIER;
1862 } else if (!strcmp(this_char, MNTOPT_NOBARRIER)) {
1863 args->flags &= ~XFSMNT_BARRIER;
1864 } else if (!strcmp(this_char, MNTOPT_IKEEP)) {
1865 args->flags &= ~XFSMNT_IDELETE;
1866 } else if (!strcmp(this_char, MNTOPT_NOIKEEP)) {
1867 args->flags |= XFSMNT_IDELETE;
1868 } else if (!strcmp(this_char, MNTOPT_LARGEIO)) {
1869 args->flags2 &= ~XFSMNT2_COMPAT_IOSIZE;
1870 } else if (!strcmp(this_char, MNTOPT_NOLARGEIO)) {
1871 args->flags2 |= XFSMNT2_COMPAT_IOSIZE;
1872 } else if (!strcmp(this_char, MNTOPT_ATTR2)) {
1873 args->flags |= XFSMNT_ATTR2;
1874 } else if (!strcmp(this_char, MNTOPT_NOATTR2)) {
1875 args->flags &= ~XFSMNT_ATTR2;
1876 } else if (!strcmp(this_char, "osyncisdsync")) {
1877 /* no-op, this is now the default */
1878 printf("XFS: osyncisdsync is now the default, option is deprecated.\n");
1879 } else if (!strcmp(this_char, "irixsgid")) {
1880 printf("XFS: irixsgid is now a sysctl(2) variable, option is deprecated.\n");
1881 } else {
1882 printf("XFS: unknown mount option [%s].\n", this_char);
1883 return EINVAL;
1884 }
1885 }
1886
1887 if (args->flags & XFSMNT_NORECOVERY) {
1888 if ((vfsp->vfs_flag & VFS_RDONLY) == 0) {
1889 printf("XFS: no-recovery mounts must be read-only.\n");
1890 return EINVAL;
1891 }
1892 }
1893
1894 if ((args->flags & XFSMNT_NOALIGN) && (dsunit || dswidth)) {
1895 printf(
1896 "XFS: sunit and swidth options incompatible with the noalign option\n");
1897 return EINVAL;
1898 }
1899
1900 if ((dsunit && !dswidth) || (!dsunit && dswidth)) {
1901 printf("XFS: sunit and swidth must be specified together\n");
1902 return EINVAL;
1903 }
1904
1905 if (dsunit && (dswidth % dsunit != 0)) {
1906 printf(
1907 "XFS: stripe width (%d) must be a multiple of the stripe unit (%d)\n",
1908 dswidth, dsunit);
1909 return EINVAL;
1910 }
1911
1912 if ((args->flags & XFSMNT_NOALIGN) != XFSMNT_NOALIGN) {
1913 if (dsunit) {
1914 args->sunit = dsunit;
1915 args->flags |= XFSMNT_RETERR;
1916 } else {
1917 args->sunit = vol_dsunit;
1918 }
1919 dswidth ? (args->swidth = dswidth) :
1920 (args->swidth = vol_dswidth);
1921 } else {
1922 args->sunit = args->swidth = 0;
1923 }
1924
1925 done:
1926 if (args->flags & XFSMNT_32BITINODES)
1927 vfsp->vfs_flag |= VFS_32BITINODES;
1928 if (args->flags2)
1929 args->flags |= XFSMNT_FLAGS2;
1930 return 0;
1931 }
1932
1933 #define seq_printf sbuf_printf
1934 STATIC int
1935 xfs_showargs(
1936 struct bhv_desc *bhv,
1937 struct sbuf *m)
1938 {
1939 static struct proc_xfs_info {
1940 int flag;
1941 char *str;
1942 } xfs_info[] = {
1943 /* the few simple ones we can get from the mount struct */
1944 { XFS_MOUNT_WSYNC, "," MNTOPT_WSYNC },
1945 { XFS_MOUNT_INO64, "," MNTOPT_INO64 },
1946 { XFS_MOUNT_NOALIGN, "," MNTOPT_NOALIGN },
1947 { XFS_MOUNT_SWALLOC, "," MNTOPT_SWALLOC },
1948 { XFS_MOUNT_NOUUID, "," MNTOPT_NOUUID },
1949 { XFS_MOUNT_NORECOVERY, "," MNTOPT_NORECOVERY },
1950 { XFS_MOUNT_OSYNCISOSYNC, "," MNTOPT_OSYNCISOSYNC },
1951 { 0, NULL }
1952 };
1953 struct proc_xfs_info *xfs_infop;
1954 struct xfs_mount *mp = XFS_BHVTOM(bhv);
1955 struct xfs_vfs *vfsp = XFS_MTOVFS(mp);
1956
1957 for (xfs_infop = xfs_info; xfs_infop->flag; xfs_infop++) {
1958 if (mp->m_flags & xfs_infop->flag)
1959 sbuf_printf(m, "%s", xfs_infop->str);
1960 }
1961
1962 if (mp->m_flags & XFS_MOUNT_IHASHSIZE)
1963 seq_printf(m, "," MNTOPT_IHASHSIZE "=%d", mp->m_ihsize);
1964
1965 if (mp->m_flags & XFS_MOUNT_DFLT_IOSIZE)
1966 seq_printf(m, "," MNTOPT_ALLOCSIZE "=%dk",
1967 (int)(1 << mp->m_writeio_log) >> 10);
1968
1969 if (mp->m_logbufs > 0)
1970 sbuf_printf(m, "," MNTOPT_LOGBUFS "=%d", mp->m_logbufs);
1971 if (mp->m_logbsize > 0)
1972 seq_printf(m, "," MNTOPT_LOGBSIZE "=%dk", mp->m_logbsize >> 10);
1973
1974 if (mp->m_logname)
1975 seq_printf(m, "," MNTOPT_LOGDEV "=%s", mp->m_logname);
1976 if (mp->m_rtname)
1977 seq_printf(m, "," MNTOPT_RTDEV "=%s", mp->m_rtname);
1978
1979 if (mp->m_dalign > 0)
1980 sbuf_printf(m, "," MNTOPT_SUNIT "=%d",
1981 (int)XFS_FSB_TO_BB(mp, mp->m_dalign));
1982 if (mp->m_swidth > 0)
1983 sbuf_printf(m, "," MNTOPT_SWIDTH "=%d",
1984 (int)XFS_FSB_TO_BB(mp, mp->m_swidth));
1985
1986 if (!(mp->m_flags & XFS_MOUNT_IDELETE))
1987 seq_printf(m, "," MNTOPT_IKEEP);
1988 if (!(mp->m_flags & XFS_MOUNT_COMPAT_IOSIZE))
1989 seq_printf(m, "," MNTOPT_LARGEIO);
1990
1991 if (!(vfsp->vfs_flag & VFS_32BITINODES))
1992 sbuf_printf(m, "," MNTOPT_64BITINODE);
1993 if (vfsp->vfs_flag & VFS_GRPID)
1994 seq_printf(m, "," MNTOPT_GRPID);
1995
1996 return 0;
1997 }
1998
1999 STATIC void
2000 xfs_freeze(
2001 bhv_desc_t *bdp)
2002 {
2003 xfs_mount_t *mp = XFS_BHVTOM(bdp);
2004
2005 while (atomic_read(&mp->m_active_trans) > 0)
2006 delay(100);
2007
2008 /* Push the superblock and write an unmount record */
2009 xfs_log_unmount_write(mp);
2010 xfs_unmountfs_writesb(mp);
2011 xfs_fs_log_dummy(mp);
2012 }
2013
2014
2015 xvfsops_t xfs_vfsops = {
2016 BHV_IDENTITY_INIT(VFS_BHV_XFS,VFS_POSITION_XFS),
2017 .xvfs_parseargs = xfs_parseargs,
2018 .xvfs_showargs = xfs_showargs,
2019 .xvfs_mount = xfs_mount,
2020 .xvfs_unmount = xfs_unmount,
2021 .xvfs_mntupdate = xfs_mntupdate,
2022 .xvfs_root = xfs_root,
2023 .xvfs_statvfs = xfs_statvfs,
2024 .xvfs_sync = xfs_sync,
2025 .xvfs_vget = xfs_vget,
2026 .xvfs_dmapiops = (xvfs_dmapiops_t)fs_nosys,
2027 .xvfs_quotactl = (xvfs_quotactl_t)fs_nosys,
2028 .xvfs_get_inode = (xvfs_get_inode_t)fs_nosys,
2029 .xvfs_init_vnode = xfs_initialize_vnode,
2030 .xvfs_force_shutdown = xfs_do_force_shutdown,
2031 .xvfs_freeze = xfs_freeze,
2032 };

Properties

Name Value
svn:keywords MidnightBSD=%H