2 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
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.
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.
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
20 #include "xfs_types.h"
22 #include "xfs_trans.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"
44 * File system operations
54 memset(geo, 0, sizeof(*geo));
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;
74 if (new_version >= 3) {
75 geo->version = XFS_FSOP_GEOM_VERSION;
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 (xfs_sb_version_hasprojid32bit(&mp->m_sb) ?
102 XFS_FSOP_GEOM_FLAGS_PROJID32 : 0);
103 geo->logsectsize = xfs_sb_version_hassector(&mp->m_sb) ?
104 mp->m_sb.sb_logsectsize : BBSIZE;
105 geo->rtsectsize = mp->m_sb.sb_blocksize;
106 geo->dirblocksize = mp->m_dirblksize;
108 if (new_version >= 4) {
110 (xfs_sb_version_haslogv2(&mp->m_sb) ?
111 XFS_FSOP_GEOM_FLAGS_LOGV2 : 0);
112 geo->logsunit = mp->m_sb.sb_logsunit;
117 static struct xfs_buf *
118 xfs_growfs_get_hdr_buf(
119 struct xfs_mount *mp,
126 bp = xfs_buf_get_uncached(mp->m_ddev_targp, numblks, flags);
130 xfs_buf_zero(bp, 0, BBTOB(bp->b_length));
132 bp->b_maps[0].bm_bn = blkno;
138 xfs_growfs_data_private(
139 xfs_mount_t *mp, /* mount point for filesystem */
140 xfs_growfs_data_t *in) /* growfs data input struct */
146 xfs_extlen_t tmpsize;
147 xfs_alloc_rec_t *arec;
152 xfs_agnumber_t nagcount;
153 xfs_agnumber_t nagimax = 0;
154 xfs_rfsblock_t nb, nb_mod;
156 xfs_rfsblock_t nfree;
157 xfs_agnumber_t oagcount;
163 if (nb < mp->m_sb.sb_dblocks || pct < 0 || pct > 100)
164 return XFS_ERROR(EINVAL);
165 if ((error = xfs_sb_validate_fsb_count(&mp->m_sb, nb)))
167 dpct = pct - mp->m_sb.sb_imax_pct;
168 bp = xfs_buf_read_uncached(mp->m_ddev_targp,
169 XFS_FSB_TO_BB(mp, nb) - XFS_FSS_TO_BB(mp, 1),
170 XFS_FSS_TO_BB(mp, 1), 0);
175 new = nb; /* use new as a temporary here */
176 nb_mod = do_div(new, mp->m_sb.sb_agblocks);
177 nagcount = new + (nb_mod != 0);
178 if (nb_mod && nb_mod < XFS_MIN_AG_BLOCKS) {
180 nb = (xfs_rfsblock_t)nagcount * mp->m_sb.sb_agblocks;
181 if (nb < mp->m_sb.sb_dblocks)
182 return XFS_ERROR(EINVAL);
184 new = nb - mp->m_sb.sb_dblocks;
185 oagcount = mp->m_sb.sb_agcount;
187 /* allocate the new per-ag structures */
188 if (nagcount > oagcount) {
189 error = xfs_initialize_perag(mp, nagcount, &nagimax);
194 tp = xfs_trans_alloc(mp, XFS_TRANS_GROWFS);
195 tp->t_flags |= XFS_TRANS_RESERVE;
196 if ((error = xfs_trans_reserve(tp, XFS_GROWFS_SPACE_RES(mp),
197 XFS_GROWDATA_LOG_RES(mp), 0, 0, 0))) {
198 xfs_trans_cancel(tp, 0);
203 * Write new AG headers to disk. Non-transactional, but written
204 * synchronously so they are completed prior to the growfs transaction
208 for (agno = nagcount - 1; agno >= oagcount; agno--, new -= agsize) {
210 * AG freelist header block
212 bp = xfs_growfs_get_hdr_buf(mp,
213 XFS_AG_DADDR(mp, agno, XFS_AGF_DADDR(mp)),
214 XFS_FSS_TO_BB(mp, 1), 0);
220 agf = XFS_BUF_TO_AGF(bp);
221 agf->agf_magicnum = cpu_to_be32(XFS_AGF_MAGIC);
222 agf->agf_versionnum = cpu_to_be32(XFS_AGF_VERSION);
223 agf->agf_seqno = cpu_to_be32(agno);
224 if (agno == nagcount - 1)
227 (agno * (xfs_rfsblock_t)mp->m_sb.sb_agblocks);
229 agsize = mp->m_sb.sb_agblocks;
230 agf->agf_length = cpu_to_be32(agsize);
231 agf->agf_roots[XFS_BTNUM_BNOi] = cpu_to_be32(XFS_BNO_BLOCK(mp));
232 agf->agf_roots[XFS_BTNUM_CNTi] = cpu_to_be32(XFS_CNT_BLOCK(mp));
233 agf->agf_levels[XFS_BTNUM_BNOi] = cpu_to_be32(1);
234 agf->agf_levels[XFS_BTNUM_CNTi] = cpu_to_be32(1);
235 agf->agf_flfirst = 0;
236 agf->agf_fllast = cpu_to_be32(XFS_AGFL_SIZE(mp) - 1);
237 agf->agf_flcount = 0;
238 tmpsize = agsize - XFS_PREALLOC_BLOCKS(mp);
239 agf->agf_freeblks = cpu_to_be32(tmpsize);
240 agf->agf_longest = cpu_to_be32(tmpsize);
241 error = xfs_bwrite(bp);
247 * AG inode header block
249 bp = xfs_growfs_get_hdr_buf(mp,
250 XFS_AG_DADDR(mp, agno, XFS_AGI_DADDR(mp)),
251 XFS_FSS_TO_BB(mp, 1), 0);
257 agi = XFS_BUF_TO_AGI(bp);
258 agi->agi_magicnum = cpu_to_be32(XFS_AGI_MAGIC);
259 agi->agi_versionnum = cpu_to_be32(XFS_AGI_VERSION);
260 agi->agi_seqno = cpu_to_be32(agno);
261 agi->agi_length = cpu_to_be32(agsize);
263 agi->agi_root = cpu_to_be32(XFS_IBT_BLOCK(mp));
264 agi->agi_level = cpu_to_be32(1);
265 agi->agi_freecount = 0;
266 agi->agi_newino = cpu_to_be32(NULLAGINO);
267 agi->agi_dirino = cpu_to_be32(NULLAGINO);
268 for (bucket = 0; bucket < XFS_AGI_UNLINKED_BUCKETS; bucket++)
269 agi->agi_unlinked[bucket] = cpu_to_be32(NULLAGINO);
270 error = xfs_bwrite(bp);
276 * BNO btree root block
278 bp = xfs_growfs_get_hdr_buf(mp,
279 XFS_AGB_TO_DADDR(mp, agno, XFS_BNO_BLOCK(mp)),
280 BTOBB(mp->m_sb.sb_blocksize), 0);
287 xfs_btree_init_block(mp, bp, XFS_ABTB_MAGIC, 0, 1, 0);
288 arec = XFS_ALLOC_REC_ADDR(mp, XFS_BUF_TO_BLOCK(bp), 1);
289 arec->ar_startblock = cpu_to_be32(XFS_PREALLOC_BLOCKS(mp));
290 arec->ar_blockcount = cpu_to_be32(
291 agsize - be32_to_cpu(arec->ar_startblock));
293 error = xfs_bwrite(bp);
299 * CNT btree root block
301 bp = xfs_growfs_get_hdr_buf(mp,
302 XFS_AGB_TO_DADDR(mp, agno, XFS_CNT_BLOCK(mp)),
303 BTOBB(mp->m_sb.sb_blocksize), 0);
309 xfs_btree_init_block(mp, bp, XFS_ABTC_MAGIC, 0, 1, 0);
310 arec = XFS_ALLOC_REC_ADDR(mp, XFS_BUF_TO_BLOCK(bp), 1);
311 arec->ar_startblock = cpu_to_be32(XFS_PREALLOC_BLOCKS(mp));
312 arec->ar_blockcount = cpu_to_be32(
313 agsize - be32_to_cpu(arec->ar_startblock));
314 nfree += be32_to_cpu(arec->ar_blockcount);
316 error = xfs_bwrite(bp);
322 * INO btree root block
324 bp = xfs_growfs_get_hdr_buf(mp,
325 XFS_AGB_TO_DADDR(mp, agno, XFS_IBT_BLOCK(mp)),
326 BTOBB(mp->m_sb.sb_blocksize), 0);
332 xfs_btree_init_block(mp, bp, XFS_IBT_MAGIC, 0, 0, 0);
334 error = xfs_bwrite(bp);
339 xfs_trans_agblocks_delta(tp, nfree);
341 * There are new blocks in the old last a.g.
345 * Change the agi length.
347 error = xfs_ialloc_read_agi(mp, tp, agno, &bp);
352 agi = XFS_BUF_TO_AGI(bp);
353 be32_add_cpu(&agi->agi_length, new);
354 ASSERT(nagcount == oagcount ||
355 be32_to_cpu(agi->agi_length) == mp->m_sb.sb_agblocks);
356 xfs_ialloc_log_agi(tp, bp, XFS_AGI_LENGTH);
360 error = xfs_alloc_read_agf(mp, tp, agno, 0, &bp);
365 agf = XFS_BUF_TO_AGF(bp);
366 be32_add_cpu(&agf->agf_length, new);
367 ASSERT(be32_to_cpu(agf->agf_length) ==
368 be32_to_cpu(agi->agi_length));
370 xfs_alloc_log_agf(tp, bp, XFS_AGF_LENGTH);
372 * Free the new space.
374 error = xfs_free_extent(tp, XFS_AGB_TO_FSB(mp, agno,
375 be32_to_cpu(agf->agf_length) - new), new);
382 * Update changed superblock fields transactionally. These are not
383 * seen by the rest of the world until the transaction commit applies
384 * them atomically to the superblock.
386 if (nagcount > oagcount)
387 xfs_trans_mod_sb(tp, XFS_TRANS_SB_AGCOUNT, nagcount - oagcount);
388 if (nb > mp->m_sb.sb_dblocks)
389 xfs_trans_mod_sb(tp, XFS_TRANS_SB_DBLOCKS,
390 nb - mp->m_sb.sb_dblocks);
392 xfs_trans_mod_sb(tp, XFS_TRANS_SB_FDBLOCKS, nfree);
394 xfs_trans_mod_sb(tp, XFS_TRANS_SB_IMAXPCT, dpct);
395 error = xfs_trans_commit(tp, 0);
399 /* New allocation groups fully initialized, so update mount struct */
401 mp->m_maxagi = nagimax;
402 if (mp->m_sb.sb_imax_pct) {
403 __uint64_t icount = mp->m_sb.sb_dblocks * mp->m_sb.sb_imax_pct;
405 mp->m_maxicount = icount << mp->m_sb.sb_inopblog;
408 xfs_set_low_space_thresholds(mp);
410 /* update secondary superblocks. */
411 for (agno = 1; agno < nagcount; agno++) {
414 * new secondary superblocks need to be zeroed, not read from
415 * disk as the contents of the new area we are growing into is
416 * completely unknown.
418 if (agno < oagcount) {
419 error = xfs_trans_read_buf(mp, NULL, mp->m_ddev_targp,
420 XFS_AGB_TO_DADDR(mp, agno, XFS_SB_BLOCK(mp)),
421 XFS_FSS_TO_BB(mp, 1), 0, &bp);
423 bp = xfs_trans_get_buf(NULL, mp->m_ddev_targp,
424 XFS_AGB_TO_DADDR(mp, agno, XFS_SB_BLOCK(mp)),
425 XFS_FSS_TO_BB(mp, 1), 0);
427 xfs_buf_zero(bp, 0, BBTOB(bp->b_length));
434 "error %d reading secondary superblock for ag %d",
438 xfs_sb_to_disk(XFS_BUF_TO_SBP(bp), &mp->m_sb, XFS_SB_ALL_BITS);
440 * If we get an error writing out the alternate superblocks,
441 * just issue a warning and continue. The real work is
442 * already done and committed.
444 error = xfs_bwrite(bp);
448 "write error %d updating secondary superblock for ag %d",
450 break; /* no point in continuing */
456 xfs_trans_cancel(tp, XFS_TRANS_ABORT);
461 xfs_growfs_log_private(
462 xfs_mount_t *mp, /* mount point for filesystem */
463 xfs_growfs_log_t *in) /* growfs log input struct */
468 if (nb < XFS_MIN_LOG_BLOCKS || nb < XFS_B_TO_FSB(mp, XFS_MIN_LOG_BYTES))
469 return XFS_ERROR(EINVAL);
470 if (nb == mp->m_sb.sb_logblocks &&
471 in->isint == (mp->m_sb.sb_logstart != 0))
472 return XFS_ERROR(EINVAL);
474 * Moving the log is hard, need new interfaces to sync
475 * the log first, hold off all activity while moving it.
476 * Can have shorter or longer log in the same space,
477 * or transform internal to external log or vice versa.
479 return XFS_ERROR(ENOSYS);
483 * protected versions of growfs function acquire and release locks on the mount
484 * point - exported through ioctls: XFS_IOC_FSGROWFSDATA, XFS_IOC_FSGROWFSLOG,
492 xfs_growfs_data_t *in)
496 if (!capable(CAP_SYS_ADMIN))
497 return XFS_ERROR(EPERM);
498 if (!mutex_trylock(&mp->m_growlock))
499 return XFS_ERROR(EWOULDBLOCK);
500 error = xfs_growfs_data_private(mp, in);
501 mutex_unlock(&mp->m_growlock);
508 xfs_growfs_log_t *in)
512 if (!capable(CAP_SYS_ADMIN))
513 return XFS_ERROR(EPERM);
514 if (!mutex_trylock(&mp->m_growlock))
515 return XFS_ERROR(EWOULDBLOCK);
516 error = xfs_growfs_log_private(mp, in);
517 mutex_unlock(&mp->m_growlock);
522 * exported through ioctl XFS_IOC_FSCOUNTS
528 xfs_fsop_counts_t *cnt)
530 xfs_icsb_sync_counters(mp, XFS_ICSB_LAZY_COUNT);
531 spin_lock(&mp->m_sb_lock);
532 cnt->freedata = mp->m_sb.sb_fdblocks - XFS_ALLOC_SET_ASIDE(mp);
533 cnt->freertx = mp->m_sb.sb_frextents;
534 cnt->freeino = mp->m_sb.sb_ifree;
535 cnt->allocino = mp->m_sb.sb_icount;
536 spin_unlock(&mp->m_sb_lock);
541 * exported through ioctl XFS_IOC_SET_RESBLKS & XFS_IOC_GET_RESBLKS
543 * xfs_reserve_blocks is called to set m_resblks
544 * in the in-core mount table. The number of unused reserved blocks
545 * is kept in m_resblks_avail.
547 * Reserve the requested number of blocks if available. Otherwise return
548 * as many as possible to satisfy the request. The actual number
549 * reserved are returned in outval
551 * A null inval pointer indicates that only the current reserved blocks
552 * available should be returned no settings are changed.
559 xfs_fsop_resblks_t *outval)
561 __int64_t lcounter, delta, fdblks_delta;
564 /* If inval is null, report current values and return */
565 if (inval == (__uint64_t *)NULL) {
568 outval->resblks = mp->m_resblks;
569 outval->resblks_avail = mp->m_resblks_avail;
576 * With per-cpu counters, this becomes an interesting
577 * problem. we needto work out if we are freeing or allocation
578 * blocks first, then we can do the modification as necessary.
580 * We do this under the m_sb_lock so that if we are near
581 * ENOSPC, we will hold out any changes while we work out
582 * what to do. This means that the amount of free space can
583 * change while we do this, so we need to retry if we end up
584 * trying to reserve more space than is available.
586 * We also use the xfs_mod_incore_sb() interface so that we
587 * don't have to care about whether per cpu counter are
588 * enabled, disabled or even compiled in....
591 spin_lock(&mp->m_sb_lock);
592 xfs_icsb_sync_counters_locked(mp, 0);
595 * If our previous reservation was larger than the current value,
596 * then move any unused blocks back to the free pool.
599 if (mp->m_resblks > request) {
600 lcounter = mp->m_resblks_avail - request;
601 if (lcounter > 0) { /* release unused blocks */
602 fdblks_delta = lcounter;
603 mp->m_resblks_avail -= lcounter;
605 mp->m_resblks = request;
609 free = mp->m_sb.sb_fdblocks - XFS_ALLOC_SET_ASIDE(mp);
611 goto out; /* ENOSPC and fdblks_delta = 0 */
613 delta = request - mp->m_resblks;
614 lcounter = free - delta;
616 /* We can't satisfy the request, just get what we can */
617 mp->m_resblks += free;
618 mp->m_resblks_avail += free;
619 fdblks_delta = -free;
621 fdblks_delta = -delta;
622 mp->m_resblks = request;
623 mp->m_resblks_avail += delta;
628 outval->resblks = mp->m_resblks;
629 outval->resblks_avail = mp->m_resblks_avail;
631 spin_unlock(&mp->m_sb_lock);
635 * If we are putting blocks back here, m_resblks_avail is
636 * already at its max so this will put it in the free pool.
638 * If we need space, we'll either succeed in getting it
639 * from the free block count or we'll get an enospc. If
640 * we get a ENOSPC, it means things changed while we were
641 * calculating fdblks_delta and so we should try again to
642 * see if there is anything left to reserve.
644 * Don't set the reserved flag here - we don't want to reserve
645 * the extra reserve blocks from the reserve.....
648 error = xfs_icsb_modify_counters(mp, XFS_SBS_FDBLOCKS,
657 * Dump a transaction into the log that contains no real change. This is needed
658 * to be able to make the log dirty or stamp the current tail LSN into the log
659 * during the covering operation.
661 * We cannot use an inode here for this - that will push dirty state back up
662 * into the VFS and then periodic inode flushing will prevent log covering from
663 * making progress. Hence we log a field in the superblock instead and use a
664 * synchronous transaction to ensure the superblock is immediately unpinned
665 * and can be written back.
674 tp = _xfs_trans_alloc(mp, XFS_TRANS_DUMMY1, KM_SLEEP);
675 error = xfs_trans_reserve(tp, 0, mp->m_sb.sb_sectsize + 128, 0, 0,
676 XFS_DEFAULT_LOG_COUNT);
678 xfs_trans_cancel(tp, 0);
682 /* log the UUID because it is an unchanging field */
683 xfs_mod_sb(tp, XFS_SB_UUID);
684 xfs_trans_set_sync(tp);
685 return xfs_trans_commit(tp, 0);
694 case XFS_FSOP_GOING_FLAGS_DEFAULT: {
695 struct super_block *sb = freeze_bdev(mp->m_super->s_bdev);
697 if (sb && !IS_ERR(sb)) {
698 xfs_force_shutdown(mp, SHUTDOWN_FORCE_UMOUNT);
699 thaw_bdev(sb->s_bdev, sb);
704 case XFS_FSOP_GOING_FLAGS_LOGFLUSH:
705 xfs_force_shutdown(mp, SHUTDOWN_FORCE_UMOUNT);
707 case XFS_FSOP_GOING_FLAGS_NOLOGFLUSH:
708 xfs_force_shutdown(mp,
709 SHUTDOWN_FORCE_UMOUNT | SHUTDOWN_LOG_IO_ERROR);
712 return XFS_ERROR(EINVAL);
719 * Force a shutdown of the filesystem instantly while keeping the filesystem
720 * consistent. We don't do an unmount here; just shutdown the shop, make sure
721 * that absolutely nothing persistent happens to this filesystem after this
725 xfs_do_force_shutdown(
733 logerror = flags & SHUTDOWN_LOG_IO_ERROR;
735 if (!(flags & SHUTDOWN_FORCE_UMOUNT)) {
737 "%s(0x%x) called from line %d of file %s. Return address = 0x%p",
738 __func__, flags, lnnum, fname, __return_address);
741 * No need to duplicate efforts.
743 if (XFS_FORCED_SHUTDOWN(mp) && !logerror)
747 * This flags XFS_MOUNT_FS_SHUTDOWN, makes sure that we don't
748 * queue up anybody new on the log reservations, and wakes up
749 * everybody who's sleeping on log reservations to tell them
752 if (xfs_log_force_umount(mp, logerror))
755 if (flags & SHUTDOWN_CORRUPT_INCORE) {
756 xfs_alert_tag(mp, XFS_PTAG_SHUTDOWN_CORRUPT,
757 "Corruption of in-memory data detected. Shutting down filesystem");
758 if (XFS_ERRLEVEL_HIGH <= xfs_error_level)
760 } else if (!(flags & SHUTDOWN_FORCE_UMOUNT)) {
762 xfs_alert_tag(mp, XFS_PTAG_SHUTDOWN_LOGERROR,
763 "Log I/O Error Detected. Shutting down filesystem");
764 } else if (flags & SHUTDOWN_DEVICE_REQ) {
765 xfs_alert_tag(mp, XFS_PTAG_SHUTDOWN_IOERROR,
766 "All device paths lost. Shutting down filesystem");
767 } else if (!(flags & SHUTDOWN_REMOTE_REQ)) {
768 xfs_alert_tag(mp, XFS_PTAG_SHUTDOWN_IOERROR,
769 "I/O Error Detected. Shutting down filesystem");
772 if (!(flags & SHUTDOWN_FORCE_UMOUNT)) {
774 "Please umount the filesystem and rectify the problem(s)");