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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
4 * All Rights Reserved.
5 */
6#include "xfs.h"
7#include "xfs_fs.h"
8#include "xfs_shared.h"
9#include "xfs_format.h"
10#include "xfs_log_format.h"
11#include "xfs_trans_resv.h"
12#include "xfs_sb.h"
13#include "xfs_mount.h"
14#include "xfs_trans.h"
15#include "xfs_error.h"
16#include "xfs_alloc.h"
17#include "xfs_fsops.h"
18#include "xfs_trans_space.h"
19#include "xfs_log.h"
20#include "xfs_log_priv.h"
21#include "xfs_ag.h"
22#include "xfs_ag_resv.h"
23#include "xfs_trace.h"
24
25/*
26 * Write new AG headers to disk. Non-transactional, but need to be
27 * written and completed prior to the growfs transaction being logged.
28 * To do this, we use a delayed write buffer list and wait for
29 * submission and IO completion of the list as a whole. This allows the
30 * IO subsystem to merge all the AG headers in a single AG into a single
31 * IO and hide most of the latency of the IO from us.
32 *
33 * This also means that if we get an error whilst building the buffer
34 * list to write, we can cancel the entire list without having written
35 * anything.
36 */
37static int
38xfs_resizefs_init_new_ags(
39 struct xfs_trans *tp,
40 struct aghdr_init_data *id,
41 xfs_agnumber_t oagcount,
42 xfs_agnumber_t nagcount,
43 xfs_rfsblock_t delta,
44 struct xfs_perag *last_pag,
45 bool *lastag_extended)
46{
47 struct xfs_mount *mp = tp->t_mountp;
48 xfs_rfsblock_t nb = mp->m_sb.sb_dblocks + delta;
49 int error;
50
51 *lastag_extended = false;
52
53 INIT_LIST_HEAD(&id->buffer_list);
54 for (id->agno = nagcount - 1;
55 id->agno >= oagcount;
56 id->agno--, delta -= id->agsize) {
57
58 if (id->agno == nagcount - 1)
59 id->agsize = nb - (id->agno *
60 (xfs_rfsblock_t)mp->m_sb.sb_agblocks);
61 else
62 id->agsize = mp->m_sb.sb_agblocks;
63
64 error = xfs_ag_init_headers(mp, id);
65 if (error) {
66 xfs_buf_delwri_cancel(&id->buffer_list);
67 return error;
68 }
69 }
70
71 error = xfs_buf_delwri_submit(&id->buffer_list);
72 if (error)
73 return error;
74
75 if (delta) {
76 *lastag_extended = true;
77 error = xfs_ag_extend_space(last_pag, tp, delta);
78 }
79 return error;
80}
81
82/*
83 * growfs operations
84 */
85static int
86xfs_growfs_data_private(
87 struct xfs_mount *mp, /* mount point for filesystem */
88 struct xfs_growfs_data *in) /* growfs data input struct */
89{
90 xfs_agnumber_t oagcount = mp->m_sb.sb_agcount;
91 struct xfs_buf *bp;
92 int error;
93 xfs_agnumber_t nagcount;
94 xfs_agnumber_t nagimax = 0;
95 xfs_rfsblock_t nb, nb_div, nb_mod;
96 int64_t delta;
97 bool lastag_extended = false;
98 struct xfs_trans *tp;
99 struct aghdr_init_data id = {};
100 struct xfs_perag *last_pag;
101
102 nb = in->newblocks;
103 error = xfs_sb_validate_fsb_count(&mp->m_sb, nb);
104 if (error)
105 return error;
106
107 if (nb > mp->m_sb.sb_dblocks) {
108 error = xfs_buf_read_uncached(mp->m_ddev_targp,
109 XFS_FSB_TO_BB(mp, nb) - XFS_FSS_TO_BB(mp, 1),
110 XFS_FSS_TO_BB(mp, 1), 0, &bp, NULL);
111 if (error)
112 return error;
113 xfs_buf_relse(bp);
114 }
115
116 nb_div = nb;
117 nb_mod = do_div(nb_div, mp->m_sb.sb_agblocks);
118 if (nb_mod && nb_mod >= XFS_MIN_AG_BLOCKS)
119 nb_div++;
120 else if (nb_mod)
121 nb = nb_div * mp->m_sb.sb_agblocks;
122
123 if (nb_div > XFS_MAX_AGNUMBER + 1) {
124 nb_div = XFS_MAX_AGNUMBER + 1;
125 nb = nb_div * mp->m_sb.sb_agblocks;
126 }
127 nagcount = nb_div;
128 delta = nb - mp->m_sb.sb_dblocks;
129 /*
130 * Reject filesystems with a single AG because they are not
131 * supported, and reject a shrink operation that would cause a
132 * filesystem to become unsupported.
133 */
134 if (delta < 0 && nagcount < 2)
135 return -EINVAL;
136
137 /* No work to do */
138 if (delta == 0)
139 return 0;
140
141 /* TODO: shrinking the entire AGs hasn't yet completed */
142 if (nagcount < oagcount)
143 return -EINVAL;
144
145 /* allocate the new per-ag structures */
146 error = xfs_initialize_perag(mp, oagcount, nagcount, nb, &nagimax);
147 if (error)
148 return error;
149
150 if (delta > 0)
151 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_growdata,
152 XFS_GROWFS_SPACE_RES(mp), 0, XFS_TRANS_RESERVE,
153 &tp);
154 else
155 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_growdata, -delta, 0,
156 0, &tp);
157 if (error)
158 goto out_free_unused_perag;
159
160 last_pag = xfs_perag_get(mp, oagcount - 1);
161 if (delta > 0) {
162 error = xfs_resizefs_init_new_ags(tp, &id, oagcount, nagcount,
163 delta, last_pag, &lastag_extended);
164 } else {
165 xfs_warn_experimental(mp, XFS_EXPERIMENTAL_SHRINK);
166 error = xfs_ag_shrink_space(last_pag, &tp, -delta);
167 }
168 xfs_perag_put(last_pag);
169 if (error)
170 goto out_trans_cancel;
171
172 /*
173 * Update changed superblock fields transactionally. These are not
174 * seen by the rest of the world until the transaction commit applies
175 * them atomically to the superblock.
176 */
177 if (nagcount > oagcount)
178 xfs_trans_mod_sb(tp, XFS_TRANS_SB_AGCOUNT, nagcount - oagcount);
179 if (delta)
180 xfs_trans_mod_sb(tp, XFS_TRANS_SB_DBLOCKS, delta);
181 if (id.nfree)
182 xfs_trans_mod_sb(tp, XFS_TRANS_SB_FDBLOCKS, id.nfree);
183
184 /*
185 * Sync sb counters now to reflect the updated values. This is
186 * particularly important for shrink because the write verifier
187 * will fail if sb_fdblocks is ever larger than sb_dblocks.
188 */
189 if (xfs_has_lazysbcount(mp))
190 xfs_log_sb(tp);
191
192 xfs_trans_set_sync(tp);
193 error = xfs_trans_commit(tp);
194 if (error)
195 return error;
196
197 /* New allocation groups fully initialized, so update mount struct */
198 if (nagimax)
199 mp->m_maxagi = nagimax;
200 xfs_set_low_space_thresholds(mp);
201 mp->m_alloc_set_aside = xfs_alloc_set_aside(mp);
202
203 if (delta > 0) {
204 /*
205 * If we expanded the last AG, free the per-AG reservation
206 * so we can reinitialize it with the new size.
207 */
208 if (lastag_extended) {
209 struct xfs_perag *pag;
210
211 pag = xfs_perag_get(mp, id.agno);
212 xfs_ag_resv_free(pag);
213 xfs_perag_put(pag);
214 }
215 /*
216 * Reserve AG metadata blocks. ENOSPC here does not mean there
217 * was a growfs failure, just that there still isn't space for
218 * new user data after the grow has been run.
219 */
220 error = xfs_fs_reserve_ag_blocks(mp);
221 if (error == -ENOSPC)
222 error = 0;
223 }
224 return error;
225
226out_trans_cancel:
227 xfs_trans_cancel(tp);
228out_free_unused_perag:
229 if (nagcount > oagcount)
230 xfs_free_perag_range(mp, oagcount, nagcount);
231 return error;
232}
233
234static int
235xfs_growfs_log_private(
236 struct xfs_mount *mp, /* mount point for filesystem */
237 struct xfs_growfs_log *in) /* growfs log input struct */
238{
239 xfs_extlen_t nb;
240
241 nb = in->newblocks;
242 if (nb < XFS_MIN_LOG_BLOCKS || nb < XFS_B_TO_FSB(mp, XFS_MIN_LOG_BYTES))
243 return -EINVAL;
244 if (nb == mp->m_sb.sb_logblocks &&
245 in->isint == (mp->m_sb.sb_logstart != 0))
246 return -EINVAL;
247 /*
248 * Moving the log is hard, need new interfaces to sync
249 * the log first, hold off all activity while moving it.
250 * Can have shorter or longer log in the same space,
251 * or transform internal to external log or vice versa.
252 */
253 return -ENOSYS;
254}
255
256static int
257xfs_growfs_imaxpct(
258 struct xfs_mount *mp,
259 __u32 imaxpct)
260{
261 struct xfs_trans *tp;
262 int dpct;
263 int error;
264
265 if (imaxpct > 100)
266 return -EINVAL;
267
268 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_growdata,
269 XFS_GROWFS_SPACE_RES(mp), 0, XFS_TRANS_RESERVE, &tp);
270 if (error)
271 return error;
272
273 dpct = imaxpct - mp->m_sb.sb_imax_pct;
274 xfs_trans_mod_sb(tp, XFS_TRANS_SB_IMAXPCT, dpct);
275 xfs_trans_set_sync(tp);
276 return xfs_trans_commit(tp);
277}
278
279/*
280 * protected versions of growfs function acquire and release locks on the mount
281 * point - exported through ioctls: XFS_IOC_FSGROWFSDATA, XFS_IOC_FSGROWFSLOG,
282 * XFS_IOC_FSGROWFSRT
283 */
284int
285xfs_growfs_data(
286 struct xfs_mount *mp,
287 struct xfs_growfs_data *in)
288{
289 int error = 0;
290
291 if (!capable(CAP_SYS_ADMIN))
292 return -EPERM;
293 if (!mutex_trylock(&mp->m_growlock))
294 return -EWOULDBLOCK;
295
296 /* update imaxpct separately to the physical grow of the filesystem */
297 if (in->imaxpct != mp->m_sb.sb_imax_pct) {
298 error = xfs_growfs_imaxpct(mp, in->imaxpct);
299 if (error)
300 goto out_error;
301 }
302
303 if (in->newblocks != mp->m_sb.sb_dblocks) {
304 error = xfs_growfs_data_private(mp, in);
305 if (error)
306 goto out_error;
307 }
308
309 /* Post growfs calculations needed to reflect new state in operations */
310 if (mp->m_sb.sb_imax_pct) {
311 uint64_t icount = mp->m_sb.sb_dblocks * mp->m_sb.sb_imax_pct;
312 do_div(icount, 100);
313 M_IGEO(mp)->maxicount = XFS_FSB_TO_INO(mp, icount);
314 } else
315 M_IGEO(mp)->maxicount = 0;
316
317 /* Update secondary superblocks now the physical grow has completed */
318 error = xfs_update_secondary_sbs(mp);
319
320out_error:
321 /*
322 * Increment the generation unconditionally, the error could be from
323 * updating the secondary superblocks, in which case the new size
324 * is live already.
325 */
326 mp->m_generation++;
327 mutex_unlock(&mp->m_growlock);
328 return error;
329}
330
331int
332xfs_growfs_log(
333 xfs_mount_t *mp,
334 struct xfs_growfs_log *in)
335{
336 int error;
337
338 if (!capable(CAP_SYS_ADMIN))
339 return -EPERM;
340 if (!mutex_trylock(&mp->m_growlock))
341 return -EWOULDBLOCK;
342 error = xfs_growfs_log_private(mp, in);
343 mutex_unlock(&mp->m_growlock);
344 return error;
345}
346
347/*
348 * Reserve the requested number of blocks if available. Otherwise return
349 * as many as possible to satisfy the request. The actual number
350 * reserved are returned in outval.
351 */
352int
353xfs_reserve_blocks(
354 struct xfs_mount *mp,
355 uint64_t request)
356{
357 int64_t lcounter, delta;
358 int64_t fdblks_delta = 0;
359 int64_t free;
360 int error = 0;
361
362 /*
363 * With per-cpu counters, this becomes an interesting problem. we need
364 * to work out if we are freeing or allocation blocks first, then we can
365 * do the modification as necessary.
366 *
367 * We do this under the m_sb_lock so that if we are near ENOSPC, we will
368 * hold out any changes while we work out what to do. This means that
369 * the amount of free space can change while we do this, so we need to
370 * retry if we end up trying to reserve more space than is available.
371 */
372 spin_lock(&mp->m_sb_lock);
373
374 /*
375 * If our previous reservation was larger than the current value,
376 * then move any unused blocks back to the free pool. Modify the resblks
377 * counters directly since we shouldn't have any problems unreserving
378 * space.
379 */
380 if (mp->m_resblks > request) {
381 lcounter = mp->m_resblks_avail - request;
382 if (lcounter > 0) { /* release unused blocks */
383 fdblks_delta = lcounter;
384 mp->m_resblks_avail -= lcounter;
385 }
386 mp->m_resblks = request;
387 if (fdblks_delta) {
388 spin_unlock(&mp->m_sb_lock);
389 xfs_add_fdblocks(mp, fdblks_delta);
390 spin_lock(&mp->m_sb_lock);
391 }
392
393 goto out;
394 }
395
396 /*
397 * If the request is larger than the current reservation, reserve the
398 * blocks before we update the reserve counters. Sample m_fdblocks and
399 * perform a partial reservation if the request exceeds free space.
400 *
401 * The code below estimates how many blocks it can request from
402 * fdblocks to stash in the reserve pool. This is a classic TOCTOU
403 * race since fdblocks updates are not always coordinated via
404 * m_sb_lock. Set the reserve size even if there's not enough free
405 * space to fill it because mod_fdblocks will refill an undersized
406 * reserve when it can.
407 */
408 free = percpu_counter_sum(&mp->m_fdblocks) -
409 xfs_fdblocks_unavailable(mp);
410 delta = request - mp->m_resblks;
411 mp->m_resblks = request;
412 if (delta > 0 && free > 0) {
413 /*
414 * We'll either succeed in getting space from the free block
415 * count or we'll get an ENOSPC. Don't set the reserved flag
416 * here - we don't want to reserve the extra reserve blocks
417 * from the reserve.
418 *
419 * The desired reserve size can change after we drop the lock.
420 * Use mod_fdblocks to put the space into the reserve or into
421 * fdblocks as appropriate.
422 */
423 fdblks_delta = min(free, delta);
424 spin_unlock(&mp->m_sb_lock);
425 error = xfs_dec_fdblocks(mp, fdblks_delta, 0);
426 if (!error)
427 xfs_add_fdblocks(mp, fdblks_delta);
428 spin_lock(&mp->m_sb_lock);
429 }
430out:
431 spin_unlock(&mp->m_sb_lock);
432 return error;
433}
434
435int
436xfs_fs_goingdown(
437 xfs_mount_t *mp,
438 uint32_t inflags)
439{
440 switch (inflags) {
441 case XFS_FSOP_GOING_FLAGS_DEFAULT: {
442 if (!bdev_freeze(mp->m_super->s_bdev)) {
443 xfs_force_shutdown(mp, SHUTDOWN_FORCE_UMOUNT);
444 bdev_thaw(mp->m_super->s_bdev);
445 }
446 break;
447 }
448 case XFS_FSOP_GOING_FLAGS_LOGFLUSH:
449 xfs_force_shutdown(mp, SHUTDOWN_FORCE_UMOUNT);
450 break;
451 case XFS_FSOP_GOING_FLAGS_NOLOGFLUSH:
452 xfs_force_shutdown(mp,
453 SHUTDOWN_FORCE_UMOUNT | SHUTDOWN_LOG_IO_ERROR);
454 break;
455 default:
456 return -EINVAL;
457 }
458
459 return 0;
460}
461
462/*
463 * Force a shutdown of the filesystem instantly while keeping the filesystem
464 * consistent. We don't do an unmount here; just shutdown the shop, make sure
465 * that absolutely nothing persistent happens to this filesystem after this
466 * point.
467 *
468 * The shutdown state change is atomic, resulting in the first and only the
469 * first shutdown call processing the shutdown. This means we only shutdown the
470 * log once as it requires, and we don't spam the logs when multiple concurrent
471 * shutdowns race to set the shutdown flags.
472 */
473void
474xfs_do_force_shutdown(
475 struct xfs_mount *mp,
476 uint32_t flags,
477 char *fname,
478 int lnnum)
479{
480 int tag;
481 const char *why;
482
483
484 if (xfs_set_shutdown(mp)) {
485 xlog_shutdown_wait(mp->m_log);
486 return;
487 }
488 if (mp->m_sb_bp)
489 mp->m_sb_bp->b_flags |= XBF_DONE;
490
491 if (flags & SHUTDOWN_FORCE_UMOUNT)
492 xfs_alert(mp, "User initiated shutdown received.");
493
494 if (xlog_force_shutdown(mp->m_log, flags)) {
495 tag = XFS_PTAG_SHUTDOWN_LOGERROR;
496 why = "Log I/O Error";
497 } else if (flags & SHUTDOWN_CORRUPT_INCORE) {
498 tag = XFS_PTAG_SHUTDOWN_CORRUPT;
499 why = "Corruption of in-memory data";
500 } else if (flags & SHUTDOWN_CORRUPT_ONDISK) {
501 tag = XFS_PTAG_SHUTDOWN_CORRUPT;
502 why = "Corruption of on-disk metadata";
503 } else if (flags & SHUTDOWN_DEVICE_REMOVED) {
504 tag = XFS_PTAG_SHUTDOWN_IOERROR;
505 why = "Block device removal";
506 } else {
507 tag = XFS_PTAG_SHUTDOWN_IOERROR;
508 why = "Metadata I/O Error";
509 }
510
511 trace_xfs_force_shutdown(mp, tag, flags, fname, lnnum);
512
513 xfs_alert_tag(mp, tag,
514"%s (0x%x) detected at %pS (%s:%d). Shutting down filesystem.",
515 why, flags, __return_address, fname, lnnum);
516 xfs_alert(mp,
517 "Please unmount the filesystem and rectify the problem(s)");
518 if (xfs_error_level >= XFS_ERRLEVEL_HIGH)
519 xfs_stack_trace();
520}
521
522/*
523 * Reserve free space for per-AG metadata.
524 */
525int
526xfs_fs_reserve_ag_blocks(
527 struct xfs_mount *mp)
528{
529 struct xfs_perag *pag = NULL;
530 int error = 0;
531 int err2;
532
533 mp->m_finobt_nores = false;
534 while ((pag = xfs_perag_next(mp, pag))) {
535 err2 = xfs_ag_resv_init(pag, NULL);
536 if (err2 && !error)
537 error = err2;
538 }
539
540 if (error && error != -ENOSPC) {
541 xfs_warn(mp,
542 "Error %d reserving per-AG metadata reserve pool.", error);
543 xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE);
544 }
545
546 return error;
547}
548
549/*
550 * Free space reserved for per-AG metadata.
551 */
552void
553xfs_fs_unreserve_ag_blocks(
554 struct xfs_mount *mp)
555{
556 struct xfs_perag *pag = NULL;
557
558 while ((pag = xfs_perag_next(mp, pag)))
559 xfs_ag_resv_free(pag);
560}
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_log.h"
22#include "xfs_trans.h"
23#include "xfs_sb.h"
24#include "xfs_ag.h"
25#include "xfs_mount.h"
26#include "xfs_bmap_btree.h"
27#include "xfs_alloc_btree.h"
28#include "xfs_ialloc_btree.h"
29#include "xfs_dinode.h"
30#include "xfs_inode.h"
31#include "xfs_inode_item.h"
32#include "xfs_btree.h"
33#include "xfs_error.h"
34#include "xfs_alloc.h"
35#include "xfs_ialloc.h"
36#include "xfs_fsops.h"
37#include "xfs_itable.h"
38#include "xfs_trans_space.h"
39#include "xfs_rtalloc.h"
40#include "xfs_filestream.h"
41#include "xfs_trace.h"
42
43/*
44 * File system operations
45 */
46
47int
48xfs_fs_geometry(
49 xfs_mount_t *mp,
50 xfs_fsop_geom_t *geo,
51 int new_version)
52{
53
54 memset(geo, 0, sizeof(*geo));
55
56 geo->blocksize = mp->m_sb.sb_blocksize;
57 geo->rtextsize = mp->m_sb.sb_rextsize;
58 geo->agblocks = mp->m_sb.sb_agblocks;
59 geo->agcount = mp->m_sb.sb_agcount;
60 geo->logblocks = mp->m_sb.sb_logblocks;
61 geo->sectsize = mp->m_sb.sb_sectsize;
62 geo->inodesize = mp->m_sb.sb_inodesize;
63 geo->imaxpct = mp->m_sb.sb_imax_pct;
64 geo->datablocks = mp->m_sb.sb_dblocks;
65 geo->rtblocks = mp->m_sb.sb_rblocks;
66 geo->rtextents = mp->m_sb.sb_rextents;
67 geo->logstart = mp->m_sb.sb_logstart;
68 ASSERT(sizeof(geo->uuid)==sizeof(mp->m_sb.sb_uuid));
69 memcpy(geo->uuid, &mp->m_sb.sb_uuid, sizeof(mp->m_sb.sb_uuid));
70 if (new_version >= 2) {
71 geo->sunit = mp->m_sb.sb_unit;
72 geo->swidth = mp->m_sb.sb_width;
73 }
74 if (new_version >= 3) {
75 geo->version = XFS_FSOP_GEOM_VERSION;
76 geo->flags =
77 (xfs_sb_version_hasattr(&mp->m_sb) ?
78 XFS_FSOP_GEOM_FLAGS_ATTR : 0) |
79 (xfs_sb_version_hasnlink(&mp->m_sb) ?
80 XFS_FSOP_GEOM_FLAGS_NLINK : 0) |
81 (xfs_sb_version_hasquota(&mp->m_sb) ?
82 XFS_FSOP_GEOM_FLAGS_QUOTA : 0) |
83 (xfs_sb_version_hasalign(&mp->m_sb) ?
84 XFS_FSOP_GEOM_FLAGS_IALIGN : 0) |
85 (xfs_sb_version_hasdalign(&mp->m_sb) ?
86 XFS_FSOP_GEOM_FLAGS_DALIGN : 0) |
87 (xfs_sb_version_hasshared(&mp->m_sb) ?
88 XFS_FSOP_GEOM_FLAGS_SHARED : 0) |
89 (xfs_sb_version_hasextflgbit(&mp->m_sb) ?
90 XFS_FSOP_GEOM_FLAGS_EXTFLG : 0) |
91 (xfs_sb_version_hasdirv2(&mp->m_sb) ?
92 XFS_FSOP_GEOM_FLAGS_DIRV2 : 0) |
93 (xfs_sb_version_hassector(&mp->m_sb) ?
94 XFS_FSOP_GEOM_FLAGS_SECTOR : 0) |
95 (xfs_sb_version_hasasciici(&mp->m_sb) ?
96 XFS_FSOP_GEOM_FLAGS_DIRV2CI : 0) |
97 (xfs_sb_version_haslazysbcount(&mp->m_sb) ?
98 XFS_FSOP_GEOM_FLAGS_LAZYSB : 0) |
99 (xfs_sb_version_hasattr2(&mp->m_sb) ?
100 XFS_FSOP_GEOM_FLAGS_ATTR2 : 0);
101 geo->logsectsize = xfs_sb_version_hassector(&mp->m_sb) ?
102 mp->m_sb.sb_logsectsize : BBSIZE;
103 geo->rtsectsize = mp->m_sb.sb_blocksize;
104 geo->dirblocksize = mp->m_dirblksize;
105 }
106 if (new_version >= 4) {
107 geo->flags |=
108 (xfs_sb_version_haslogv2(&mp->m_sb) ?
109 XFS_FSOP_GEOM_FLAGS_LOGV2 : 0);
110 geo->logsunit = mp->m_sb.sb_logsunit;
111 }
112 return 0;
113}
114
115static int
116xfs_growfs_data_private(
117 xfs_mount_t *mp, /* mount point for filesystem */
118 xfs_growfs_data_t *in) /* growfs data input struct */
119{
120 xfs_agf_t *agf;
121 xfs_agi_t *agi;
122 xfs_agnumber_t agno;
123 xfs_extlen_t agsize;
124 xfs_extlen_t tmpsize;
125 xfs_alloc_rec_t *arec;
126 struct xfs_btree_block *block;
127 xfs_buf_t *bp;
128 int bucket;
129 int dpct;
130 int error;
131 xfs_agnumber_t nagcount;
132 xfs_agnumber_t nagimax = 0;
133 xfs_rfsblock_t nb, nb_mod;
134 xfs_rfsblock_t new;
135 xfs_rfsblock_t nfree;
136 xfs_agnumber_t oagcount;
137 int pct;
138 xfs_trans_t *tp;
139
140 nb = in->newblocks;
141 pct = in->imaxpct;
142 if (nb < mp->m_sb.sb_dblocks || pct < 0 || pct > 100)
143 return XFS_ERROR(EINVAL);
144 if ((error = xfs_sb_validate_fsb_count(&mp->m_sb, nb)))
145 return error;
146 dpct = pct - mp->m_sb.sb_imax_pct;
147 bp = xfs_buf_read_uncached(mp->m_ddev_targp,
148 XFS_FSB_TO_BB(mp, nb) - XFS_FSS_TO_BB(mp, 1),
149 XFS_FSS_TO_BB(mp, 1), 0);
150 if (!bp)
151 return EIO;
152 xfs_buf_relse(bp);
153
154 new = nb; /* use new as a temporary here */
155 nb_mod = do_div(new, mp->m_sb.sb_agblocks);
156 nagcount = new + (nb_mod != 0);
157 if (nb_mod && nb_mod < XFS_MIN_AG_BLOCKS) {
158 nagcount--;
159 nb = (xfs_rfsblock_t)nagcount * mp->m_sb.sb_agblocks;
160 if (nb < mp->m_sb.sb_dblocks)
161 return XFS_ERROR(EINVAL);
162 }
163 new = nb - mp->m_sb.sb_dblocks;
164 oagcount = mp->m_sb.sb_agcount;
165
166 /* allocate the new per-ag structures */
167 if (nagcount > oagcount) {
168 error = xfs_initialize_perag(mp, nagcount, &nagimax);
169 if (error)
170 return error;
171 }
172
173 tp = xfs_trans_alloc(mp, XFS_TRANS_GROWFS);
174 tp->t_flags |= XFS_TRANS_RESERVE;
175 if ((error = xfs_trans_reserve(tp, XFS_GROWFS_SPACE_RES(mp),
176 XFS_GROWDATA_LOG_RES(mp), 0, 0, 0))) {
177 xfs_trans_cancel(tp, 0);
178 return error;
179 }
180
181 /*
182 * Write new AG headers to disk. Non-transactional, but written
183 * synchronously so they are completed prior to the growfs transaction
184 * being logged.
185 */
186 nfree = 0;
187 for (agno = nagcount - 1; agno >= oagcount; agno--, new -= agsize) {
188 /*
189 * AG freelist header block
190 */
191 bp = xfs_buf_get(mp->m_ddev_targp,
192 XFS_AG_DADDR(mp, agno, XFS_AGF_DADDR(mp)),
193 XFS_FSS_TO_BB(mp, 1), 0);
194 if (!bp) {
195 error = ENOMEM;
196 goto error0;
197 }
198 agf = XFS_BUF_TO_AGF(bp);
199 memset(agf, 0, mp->m_sb.sb_sectsize);
200 agf->agf_magicnum = cpu_to_be32(XFS_AGF_MAGIC);
201 agf->agf_versionnum = cpu_to_be32(XFS_AGF_VERSION);
202 agf->agf_seqno = cpu_to_be32(agno);
203 if (agno == nagcount - 1)
204 agsize =
205 nb -
206 (agno * (xfs_rfsblock_t)mp->m_sb.sb_agblocks);
207 else
208 agsize = mp->m_sb.sb_agblocks;
209 agf->agf_length = cpu_to_be32(agsize);
210 agf->agf_roots[XFS_BTNUM_BNOi] = cpu_to_be32(XFS_BNO_BLOCK(mp));
211 agf->agf_roots[XFS_BTNUM_CNTi] = cpu_to_be32(XFS_CNT_BLOCK(mp));
212 agf->agf_levels[XFS_BTNUM_BNOi] = cpu_to_be32(1);
213 agf->agf_levels[XFS_BTNUM_CNTi] = cpu_to_be32(1);
214 agf->agf_flfirst = 0;
215 agf->agf_fllast = cpu_to_be32(XFS_AGFL_SIZE(mp) - 1);
216 agf->agf_flcount = 0;
217 tmpsize = agsize - XFS_PREALLOC_BLOCKS(mp);
218 agf->agf_freeblks = cpu_to_be32(tmpsize);
219 agf->agf_longest = cpu_to_be32(tmpsize);
220 error = xfs_bwrite(bp);
221 xfs_buf_relse(bp);
222 if (error)
223 goto error0;
224
225 /*
226 * AG inode header block
227 */
228 bp = xfs_buf_get(mp->m_ddev_targp,
229 XFS_AG_DADDR(mp, agno, XFS_AGI_DADDR(mp)),
230 XFS_FSS_TO_BB(mp, 1), 0);
231 if (!bp) {
232 error = ENOMEM;
233 goto error0;
234 }
235 agi = XFS_BUF_TO_AGI(bp);
236 memset(agi, 0, mp->m_sb.sb_sectsize);
237 agi->agi_magicnum = cpu_to_be32(XFS_AGI_MAGIC);
238 agi->agi_versionnum = cpu_to_be32(XFS_AGI_VERSION);
239 agi->agi_seqno = cpu_to_be32(agno);
240 agi->agi_length = cpu_to_be32(agsize);
241 agi->agi_count = 0;
242 agi->agi_root = cpu_to_be32(XFS_IBT_BLOCK(mp));
243 agi->agi_level = cpu_to_be32(1);
244 agi->agi_freecount = 0;
245 agi->agi_newino = cpu_to_be32(NULLAGINO);
246 agi->agi_dirino = cpu_to_be32(NULLAGINO);
247 for (bucket = 0; bucket < XFS_AGI_UNLINKED_BUCKETS; bucket++)
248 agi->agi_unlinked[bucket] = cpu_to_be32(NULLAGINO);
249 error = xfs_bwrite(bp);
250 xfs_buf_relse(bp);
251 if (error)
252 goto error0;
253
254 /*
255 * BNO btree root block
256 */
257 bp = xfs_buf_get(mp->m_ddev_targp,
258 XFS_AGB_TO_DADDR(mp, agno, XFS_BNO_BLOCK(mp)),
259 BTOBB(mp->m_sb.sb_blocksize), 0);
260 if (!bp) {
261 error = ENOMEM;
262 goto error0;
263 }
264 block = XFS_BUF_TO_BLOCK(bp);
265 memset(block, 0, mp->m_sb.sb_blocksize);
266 block->bb_magic = cpu_to_be32(XFS_ABTB_MAGIC);
267 block->bb_level = 0;
268 block->bb_numrecs = cpu_to_be16(1);
269 block->bb_u.s.bb_leftsib = cpu_to_be32(NULLAGBLOCK);
270 block->bb_u.s.bb_rightsib = cpu_to_be32(NULLAGBLOCK);
271 arec = XFS_ALLOC_REC_ADDR(mp, block, 1);
272 arec->ar_startblock = cpu_to_be32(XFS_PREALLOC_BLOCKS(mp));
273 arec->ar_blockcount = cpu_to_be32(
274 agsize - be32_to_cpu(arec->ar_startblock));
275 error = xfs_bwrite(bp);
276 xfs_buf_relse(bp);
277 if (error)
278 goto error0;
279
280 /*
281 * CNT btree root block
282 */
283 bp = xfs_buf_get(mp->m_ddev_targp,
284 XFS_AGB_TO_DADDR(mp, agno, XFS_CNT_BLOCK(mp)),
285 BTOBB(mp->m_sb.sb_blocksize), 0);
286 if (!bp) {
287 error = ENOMEM;
288 goto error0;
289 }
290 block = XFS_BUF_TO_BLOCK(bp);
291 memset(block, 0, mp->m_sb.sb_blocksize);
292 block->bb_magic = cpu_to_be32(XFS_ABTC_MAGIC);
293 block->bb_level = 0;
294 block->bb_numrecs = cpu_to_be16(1);
295 block->bb_u.s.bb_leftsib = cpu_to_be32(NULLAGBLOCK);
296 block->bb_u.s.bb_rightsib = cpu_to_be32(NULLAGBLOCK);
297 arec = XFS_ALLOC_REC_ADDR(mp, block, 1);
298 arec->ar_startblock = cpu_to_be32(XFS_PREALLOC_BLOCKS(mp));
299 arec->ar_blockcount = cpu_to_be32(
300 agsize - be32_to_cpu(arec->ar_startblock));
301 nfree += be32_to_cpu(arec->ar_blockcount);
302 error = xfs_bwrite(bp);
303 xfs_buf_relse(bp);
304 if (error)
305 goto error0;
306
307 /*
308 * INO btree root block
309 */
310 bp = xfs_buf_get(mp->m_ddev_targp,
311 XFS_AGB_TO_DADDR(mp, agno, XFS_IBT_BLOCK(mp)),
312 BTOBB(mp->m_sb.sb_blocksize), 0);
313 if (!bp) {
314 error = ENOMEM;
315 goto error0;
316 }
317 block = XFS_BUF_TO_BLOCK(bp);
318 memset(block, 0, mp->m_sb.sb_blocksize);
319 block->bb_magic = cpu_to_be32(XFS_IBT_MAGIC);
320 block->bb_level = 0;
321 block->bb_numrecs = 0;
322 block->bb_u.s.bb_leftsib = cpu_to_be32(NULLAGBLOCK);
323 block->bb_u.s.bb_rightsib = cpu_to_be32(NULLAGBLOCK);
324 error = xfs_bwrite(bp);
325 xfs_buf_relse(bp);
326 if (error)
327 goto error0;
328 }
329 xfs_trans_agblocks_delta(tp, nfree);
330 /*
331 * There are new blocks in the old last a.g.
332 */
333 if (new) {
334 /*
335 * Change the agi length.
336 */
337 error = xfs_ialloc_read_agi(mp, tp, agno, &bp);
338 if (error) {
339 goto error0;
340 }
341 ASSERT(bp);
342 agi = XFS_BUF_TO_AGI(bp);
343 be32_add_cpu(&agi->agi_length, new);
344 ASSERT(nagcount == oagcount ||
345 be32_to_cpu(agi->agi_length) == mp->m_sb.sb_agblocks);
346 xfs_ialloc_log_agi(tp, bp, XFS_AGI_LENGTH);
347 /*
348 * Change agf length.
349 */
350 error = xfs_alloc_read_agf(mp, tp, agno, 0, &bp);
351 if (error) {
352 goto error0;
353 }
354 ASSERT(bp);
355 agf = XFS_BUF_TO_AGF(bp);
356 be32_add_cpu(&agf->agf_length, new);
357 ASSERT(be32_to_cpu(agf->agf_length) ==
358 be32_to_cpu(agi->agi_length));
359
360 xfs_alloc_log_agf(tp, bp, XFS_AGF_LENGTH);
361 /*
362 * Free the new space.
363 */
364 error = xfs_free_extent(tp, XFS_AGB_TO_FSB(mp, agno,
365 be32_to_cpu(agf->agf_length) - new), new);
366 if (error) {
367 goto error0;
368 }
369 }
370
371 /*
372 * Update changed superblock fields transactionally. These are not
373 * seen by the rest of the world until the transaction commit applies
374 * them atomically to the superblock.
375 */
376 if (nagcount > oagcount)
377 xfs_trans_mod_sb(tp, XFS_TRANS_SB_AGCOUNT, nagcount - oagcount);
378 if (nb > mp->m_sb.sb_dblocks)
379 xfs_trans_mod_sb(tp, XFS_TRANS_SB_DBLOCKS,
380 nb - mp->m_sb.sb_dblocks);
381 if (nfree)
382 xfs_trans_mod_sb(tp, XFS_TRANS_SB_FDBLOCKS, nfree);
383 if (dpct)
384 xfs_trans_mod_sb(tp, XFS_TRANS_SB_IMAXPCT, dpct);
385 error = xfs_trans_commit(tp, 0);
386 if (error)
387 return error;
388
389 /* New allocation groups fully initialized, so update mount struct */
390 if (nagimax)
391 mp->m_maxagi = nagimax;
392 if (mp->m_sb.sb_imax_pct) {
393 __uint64_t icount = mp->m_sb.sb_dblocks * mp->m_sb.sb_imax_pct;
394 do_div(icount, 100);
395 mp->m_maxicount = icount << mp->m_sb.sb_inopblog;
396 } else
397 mp->m_maxicount = 0;
398 xfs_set_low_space_thresholds(mp);
399
400 /* update secondary superblocks. */
401 for (agno = 1; agno < nagcount; agno++) {
402 error = xfs_trans_read_buf(mp, NULL, mp->m_ddev_targp,
403 XFS_AGB_TO_DADDR(mp, agno, XFS_SB_BLOCK(mp)),
404 XFS_FSS_TO_BB(mp, 1), 0, &bp);
405 if (error) {
406 xfs_warn(mp,
407 "error %d reading secondary superblock for ag %d",
408 error, agno);
409 break;
410 }
411 xfs_sb_to_disk(XFS_BUF_TO_SBP(bp), &mp->m_sb, XFS_SB_ALL_BITS);
412 /*
413 * If we get an error writing out the alternate superblocks,
414 * just issue a warning and continue. The real work is
415 * already done and committed.
416 */
417 error = xfs_bwrite(bp);
418 xfs_buf_relse(bp);
419 if (error) {
420 xfs_warn(mp,
421 "write error %d updating secondary superblock for ag %d",
422 error, agno);
423 break; /* no point in continuing */
424 }
425 }
426 return 0;
427
428 error0:
429 xfs_trans_cancel(tp, XFS_TRANS_ABORT);
430 return error;
431}
432
433static int
434xfs_growfs_log_private(
435 xfs_mount_t *mp, /* mount point for filesystem */
436 xfs_growfs_log_t *in) /* growfs log input struct */
437{
438 xfs_extlen_t nb;
439
440 nb = in->newblocks;
441 if (nb < XFS_MIN_LOG_BLOCKS || nb < XFS_B_TO_FSB(mp, XFS_MIN_LOG_BYTES))
442 return XFS_ERROR(EINVAL);
443 if (nb == mp->m_sb.sb_logblocks &&
444 in->isint == (mp->m_sb.sb_logstart != 0))
445 return XFS_ERROR(EINVAL);
446 /*
447 * Moving the log is hard, need new interfaces to sync
448 * the log first, hold off all activity while moving it.
449 * Can have shorter or longer log in the same space,
450 * or transform internal to external log or vice versa.
451 */
452 return XFS_ERROR(ENOSYS);
453}
454
455/*
456 * protected versions of growfs function acquire and release locks on the mount
457 * point - exported through ioctls: XFS_IOC_FSGROWFSDATA, XFS_IOC_FSGROWFSLOG,
458 * XFS_IOC_FSGROWFSRT
459 */
460
461
462int
463xfs_growfs_data(
464 xfs_mount_t *mp,
465 xfs_growfs_data_t *in)
466{
467 int error;
468
469 if (!capable(CAP_SYS_ADMIN))
470 return XFS_ERROR(EPERM);
471 if (!mutex_trylock(&mp->m_growlock))
472 return XFS_ERROR(EWOULDBLOCK);
473 error = xfs_growfs_data_private(mp, in);
474 mutex_unlock(&mp->m_growlock);
475 return error;
476}
477
478int
479xfs_growfs_log(
480 xfs_mount_t *mp,
481 xfs_growfs_log_t *in)
482{
483 int error;
484
485 if (!capable(CAP_SYS_ADMIN))
486 return XFS_ERROR(EPERM);
487 if (!mutex_trylock(&mp->m_growlock))
488 return XFS_ERROR(EWOULDBLOCK);
489 error = xfs_growfs_log_private(mp, in);
490 mutex_unlock(&mp->m_growlock);
491 return error;
492}
493
494/*
495 * exported through ioctl XFS_IOC_FSCOUNTS
496 */
497
498int
499xfs_fs_counts(
500 xfs_mount_t *mp,
501 xfs_fsop_counts_t *cnt)
502{
503 xfs_icsb_sync_counters(mp, XFS_ICSB_LAZY_COUNT);
504 spin_lock(&mp->m_sb_lock);
505 cnt->freedata = mp->m_sb.sb_fdblocks - XFS_ALLOC_SET_ASIDE(mp);
506 cnt->freertx = mp->m_sb.sb_frextents;
507 cnt->freeino = mp->m_sb.sb_ifree;
508 cnt->allocino = mp->m_sb.sb_icount;
509 spin_unlock(&mp->m_sb_lock);
510 return 0;
511}
512
513/*
514 * exported through ioctl XFS_IOC_SET_RESBLKS & XFS_IOC_GET_RESBLKS
515 *
516 * xfs_reserve_blocks is called to set m_resblks
517 * in the in-core mount table. The number of unused reserved blocks
518 * is kept in m_resblks_avail.
519 *
520 * Reserve the requested number of blocks if available. Otherwise return
521 * as many as possible to satisfy the request. The actual number
522 * reserved are returned in outval
523 *
524 * A null inval pointer indicates that only the current reserved blocks
525 * available should be returned no settings are changed.
526 */
527
528int
529xfs_reserve_blocks(
530 xfs_mount_t *mp,
531 __uint64_t *inval,
532 xfs_fsop_resblks_t *outval)
533{
534 __int64_t lcounter, delta, fdblks_delta;
535 __uint64_t request;
536
537 /* If inval is null, report current values and return */
538 if (inval == (__uint64_t *)NULL) {
539 if (!outval)
540 return EINVAL;
541 outval->resblks = mp->m_resblks;
542 outval->resblks_avail = mp->m_resblks_avail;
543 return 0;
544 }
545
546 request = *inval;
547
548 /*
549 * With per-cpu counters, this becomes an interesting
550 * problem. we needto work out if we are freeing or allocation
551 * blocks first, then we can do the modification as necessary.
552 *
553 * We do this under the m_sb_lock so that if we are near
554 * ENOSPC, we will hold out any changes while we work out
555 * what to do. This means that the amount of free space can
556 * change while we do this, so we need to retry if we end up
557 * trying to reserve more space than is available.
558 *
559 * We also use the xfs_mod_incore_sb() interface so that we
560 * don't have to care about whether per cpu counter are
561 * enabled, disabled or even compiled in....
562 */
563retry:
564 spin_lock(&mp->m_sb_lock);
565 xfs_icsb_sync_counters_locked(mp, 0);
566
567 /*
568 * If our previous reservation was larger than the current value,
569 * then move any unused blocks back to the free pool.
570 */
571 fdblks_delta = 0;
572 if (mp->m_resblks > request) {
573 lcounter = mp->m_resblks_avail - request;
574 if (lcounter > 0) { /* release unused blocks */
575 fdblks_delta = lcounter;
576 mp->m_resblks_avail -= lcounter;
577 }
578 mp->m_resblks = request;
579 } else {
580 __int64_t free;
581
582 free = mp->m_sb.sb_fdblocks - XFS_ALLOC_SET_ASIDE(mp);
583 if (!free)
584 goto out; /* ENOSPC and fdblks_delta = 0 */
585
586 delta = request - mp->m_resblks;
587 lcounter = free - delta;
588 if (lcounter < 0) {
589 /* We can't satisfy the request, just get what we can */
590 mp->m_resblks += free;
591 mp->m_resblks_avail += free;
592 fdblks_delta = -free;
593 } else {
594 fdblks_delta = -delta;
595 mp->m_resblks = request;
596 mp->m_resblks_avail += delta;
597 }
598 }
599out:
600 if (outval) {
601 outval->resblks = mp->m_resblks;
602 outval->resblks_avail = mp->m_resblks_avail;
603 }
604 spin_unlock(&mp->m_sb_lock);
605
606 if (fdblks_delta) {
607 /*
608 * If we are putting blocks back here, m_resblks_avail is
609 * already at its max so this will put it in the free pool.
610 *
611 * If we need space, we'll either succeed in getting it
612 * from the free block count or we'll get an enospc. If
613 * we get a ENOSPC, it means things changed while we were
614 * calculating fdblks_delta and so we should try again to
615 * see if there is anything left to reserve.
616 *
617 * Don't set the reserved flag here - we don't want to reserve
618 * the extra reserve blocks from the reserve.....
619 */
620 int error;
621 error = xfs_icsb_modify_counters(mp, XFS_SBS_FDBLOCKS,
622 fdblks_delta, 0);
623 if (error == ENOSPC)
624 goto retry;
625 }
626 return 0;
627}
628
629/*
630 * Dump a transaction into the log that contains no real change. This is needed
631 * to be able to make the log dirty or stamp the current tail LSN into the log
632 * during the covering operation.
633 *
634 * We cannot use an inode here for this - that will push dirty state back up
635 * into the VFS and then periodic inode flushing will prevent log covering from
636 * making progress. Hence we log a field in the superblock instead and use a
637 * synchronous transaction to ensure the superblock is immediately unpinned
638 * and can be written back.
639 */
640int
641xfs_fs_log_dummy(
642 xfs_mount_t *mp)
643{
644 xfs_trans_t *tp;
645 int error;
646
647 tp = _xfs_trans_alloc(mp, XFS_TRANS_DUMMY1, KM_SLEEP);
648 error = xfs_trans_reserve(tp, 0, mp->m_sb.sb_sectsize + 128, 0, 0,
649 XFS_DEFAULT_LOG_COUNT);
650 if (error) {
651 xfs_trans_cancel(tp, 0);
652 return error;
653 }
654
655 /* log the UUID because it is an unchanging field */
656 xfs_mod_sb(tp, XFS_SB_UUID);
657 xfs_trans_set_sync(tp);
658 return xfs_trans_commit(tp, 0);
659}
660
661int
662xfs_fs_goingdown(
663 xfs_mount_t *mp,
664 __uint32_t inflags)
665{
666 switch (inflags) {
667 case XFS_FSOP_GOING_FLAGS_DEFAULT: {
668 struct super_block *sb = freeze_bdev(mp->m_super->s_bdev);
669
670 if (sb && !IS_ERR(sb)) {
671 xfs_force_shutdown(mp, SHUTDOWN_FORCE_UMOUNT);
672 thaw_bdev(sb->s_bdev, sb);
673 }
674
675 break;
676 }
677 case XFS_FSOP_GOING_FLAGS_LOGFLUSH:
678 xfs_force_shutdown(mp, SHUTDOWN_FORCE_UMOUNT);
679 break;
680 case XFS_FSOP_GOING_FLAGS_NOLOGFLUSH:
681 xfs_force_shutdown(mp,
682 SHUTDOWN_FORCE_UMOUNT | SHUTDOWN_LOG_IO_ERROR);
683 break;
684 default:
685 return XFS_ERROR(EINVAL);
686 }
687
688 return 0;
689}
690
691/*
692 * Force a shutdown of the filesystem instantly while keeping the filesystem
693 * consistent. We don't do an unmount here; just shutdown the shop, make sure
694 * that absolutely nothing persistent happens to this filesystem after this
695 * point.
696 */
697void
698xfs_do_force_shutdown(
699 xfs_mount_t *mp,
700 int flags,
701 char *fname,
702 int lnnum)
703{
704 int logerror;
705
706 logerror = flags & SHUTDOWN_LOG_IO_ERROR;
707
708 if (!(flags & SHUTDOWN_FORCE_UMOUNT)) {
709 xfs_notice(mp,
710 "%s(0x%x) called from line %d of file %s. Return address = 0x%p",
711 __func__, flags, lnnum, fname, __return_address);
712 }
713 /*
714 * No need to duplicate efforts.
715 */
716 if (XFS_FORCED_SHUTDOWN(mp) && !logerror)
717 return;
718
719 /*
720 * This flags XFS_MOUNT_FS_SHUTDOWN, makes sure that we don't
721 * queue up anybody new on the log reservations, and wakes up
722 * everybody who's sleeping on log reservations to tell them
723 * the bad news.
724 */
725 if (xfs_log_force_umount(mp, logerror))
726 return;
727
728 if (flags & SHUTDOWN_CORRUPT_INCORE) {
729 xfs_alert_tag(mp, XFS_PTAG_SHUTDOWN_CORRUPT,
730 "Corruption of in-memory data detected. Shutting down filesystem");
731 if (XFS_ERRLEVEL_HIGH <= xfs_error_level)
732 xfs_stack_trace();
733 } else if (!(flags & SHUTDOWN_FORCE_UMOUNT)) {
734 if (logerror) {
735 xfs_alert_tag(mp, XFS_PTAG_SHUTDOWN_LOGERROR,
736 "Log I/O Error Detected. Shutting down filesystem");
737 } else if (flags & SHUTDOWN_DEVICE_REQ) {
738 xfs_alert_tag(mp, XFS_PTAG_SHUTDOWN_IOERROR,
739 "All device paths lost. Shutting down filesystem");
740 } else if (!(flags & SHUTDOWN_REMOTE_REQ)) {
741 xfs_alert_tag(mp, XFS_PTAG_SHUTDOWN_IOERROR,
742 "I/O Error Detected. Shutting down filesystem");
743 }
744 }
745 if (!(flags & SHUTDOWN_FORCE_UMOUNT)) {
746 xfs_alert(mp,
747 "Please umount the filesystem and rectify the problem(s)");
748 }
749}