Loading...
1/*
2 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
3 * All Rights Reserved.
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
7 * published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it would be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write the Free Software Foundation,
16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
17 */
18#include "xfs.h"
19#include "xfs_fs.h"
20#include "xfs_types.h"
21#include "xfs_bit.h"
22#include "xfs_inum.h"
23#include "xfs_log.h"
24#include "xfs_trans.h"
25#include "xfs_sb.h"
26#include "xfs_ag.h"
27#include "xfs_mount.h"
28#include "xfs_bmap_btree.h"
29#include "xfs_alloc_btree.h"
30#include "xfs_ialloc_btree.h"
31#include "xfs_dinode.h"
32#include "xfs_inode.h"
33#include "xfs_inode_item.h"
34#include "xfs_btree.h"
35#include "xfs_error.h"
36#include "xfs_alloc.h"
37#include "xfs_ialloc.h"
38#include "xfs_fsops.h"
39#include "xfs_itable.h"
40#include "xfs_trans_space.h"
41#include "xfs_rtalloc.h"
42#include "xfs_rw.h"
43#include "xfs_filestream.h"
44#include "xfs_trace.h"
45
46/*
47 * File system operations
48 */
49
50int
51xfs_fs_geometry(
52 xfs_mount_t *mp,
53 xfs_fsop_geom_t *geo,
54 int new_version)
55{
56
57 memset(geo, 0, sizeof(*geo));
58
59 geo->blocksize = mp->m_sb.sb_blocksize;
60 geo->rtextsize = mp->m_sb.sb_rextsize;
61 geo->agblocks = mp->m_sb.sb_agblocks;
62 geo->agcount = mp->m_sb.sb_agcount;
63 geo->logblocks = mp->m_sb.sb_logblocks;
64 geo->sectsize = mp->m_sb.sb_sectsize;
65 geo->inodesize = mp->m_sb.sb_inodesize;
66 geo->imaxpct = mp->m_sb.sb_imax_pct;
67 geo->datablocks = mp->m_sb.sb_dblocks;
68 geo->rtblocks = mp->m_sb.sb_rblocks;
69 geo->rtextents = mp->m_sb.sb_rextents;
70 geo->logstart = mp->m_sb.sb_logstart;
71 ASSERT(sizeof(geo->uuid)==sizeof(mp->m_sb.sb_uuid));
72 memcpy(geo->uuid, &mp->m_sb.sb_uuid, sizeof(mp->m_sb.sb_uuid));
73 if (new_version >= 2) {
74 geo->sunit = mp->m_sb.sb_unit;
75 geo->swidth = mp->m_sb.sb_width;
76 }
77 if (new_version >= 3) {
78 geo->version = XFS_FSOP_GEOM_VERSION;
79 geo->flags =
80 (xfs_sb_version_hasattr(&mp->m_sb) ?
81 XFS_FSOP_GEOM_FLAGS_ATTR : 0) |
82 (xfs_sb_version_hasnlink(&mp->m_sb) ?
83 XFS_FSOP_GEOM_FLAGS_NLINK : 0) |
84 (xfs_sb_version_hasquota(&mp->m_sb) ?
85 XFS_FSOP_GEOM_FLAGS_QUOTA : 0) |
86 (xfs_sb_version_hasalign(&mp->m_sb) ?
87 XFS_FSOP_GEOM_FLAGS_IALIGN : 0) |
88 (xfs_sb_version_hasdalign(&mp->m_sb) ?
89 XFS_FSOP_GEOM_FLAGS_DALIGN : 0) |
90 (xfs_sb_version_hasshared(&mp->m_sb) ?
91 XFS_FSOP_GEOM_FLAGS_SHARED : 0) |
92 (xfs_sb_version_hasextflgbit(&mp->m_sb) ?
93 XFS_FSOP_GEOM_FLAGS_EXTFLG : 0) |
94 (xfs_sb_version_hasdirv2(&mp->m_sb) ?
95 XFS_FSOP_GEOM_FLAGS_DIRV2 : 0) |
96 (xfs_sb_version_hassector(&mp->m_sb) ?
97 XFS_FSOP_GEOM_FLAGS_SECTOR : 0) |
98 (xfs_sb_version_hasasciici(&mp->m_sb) ?
99 XFS_FSOP_GEOM_FLAGS_DIRV2CI : 0) |
100 (xfs_sb_version_haslazysbcount(&mp->m_sb) ?
101 XFS_FSOP_GEOM_FLAGS_LAZYSB : 0) |
102 (xfs_sb_version_hasattr2(&mp->m_sb) ?
103 XFS_FSOP_GEOM_FLAGS_ATTR2 : 0);
104 geo->logsectsize = xfs_sb_version_hassector(&mp->m_sb) ?
105 mp->m_sb.sb_logsectsize : BBSIZE;
106 geo->rtsectsize = mp->m_sb.sb_blocksize;
107 geo->dirblocksize = mp->m_dirblksize;
108 }
109 if (new_version >= 4) {
110 geo->flags |=
111 (xfs_sb_version_haslogv2(&mp->m_sb) ?
112 XFS_FSOP_GEOM_FLAGS_LOGV2 : 0);
113 geo->logsunit = mp->m_sb.sb_logsunit;
114 }
115 return 0;
116}
117
118static int
119xfs_growfs_data_private(
120 xfs_mount_t *mp, /* mount point for filesystem */
121 xfs_growfs_data_t *in) /* growfs data input struct */
122{
123 xfs_agf_t *agf;
124 xfs_agi_t *agi;
125 xfs_agnumber_t agno;
126 xfs_extlen_t agsize;
127 xfs_extlen_t tmpsize;
128 xfs_alloc_rec_t *arec;
129 struct xfs_btree_block *block;
130 xfs_buf_t *bp;
131 int bucket;
132 int dpct;
133 int error;
134 xfs_agnumber_t nagcount;
135 xfs_agnumber_t nagimax = 0;
136 xfs_rfsblock_t nb, nb_mod;
137 xfs_rfsblock_t new;
138 xfs_rfsblock_t nfree;
139 xfs_agnumber_t oagcount;
140 int pct;
141 xfs_trans_t *tp;
142
143 nb = in->newblocks;
144 pct = in->imaxpct;
145 if (nb < mp->m_sb.sb_dblocks || pct < 0 || pct > 100)
146 return XFS_ERROR(EINVAL);
147 if ((error = xfs_sb_validate_fsb_count(&mp->m_sb, nb)))
148 return error;
149 dpct = pct - mp->m_sb.sb_imax_pct;
150 bp = xfs_buf_read_uncached(mp, mp->m_ddev_targp,
151 XFS_FSB_TO_BB(mp, nb) - XFS_FSS_TO_BB(mp, 1),
152 BBTOB(XFS_FSS_TO_BB(mp, 1)), 0);
153 if (!bp)
154 return EIO;
155 xfs_buf_relse(bp);
156
157 new = nb; /* use new as a temporary here */
158 nb_mod = do_div(new, mp->m_sb.sb_agblocks);
159 nagcount = new + (nb_mod != 0);
160 if (nb_mod && nb_mod < XFS_MIN_AG_BLOCKS) {
161 nagcount--;
162 nb = (xfs_rfsblock_t)nagcount * mp->m_sb.sb_agblocks;
163 if (nb < mp->m_sb.sb_dblocks)
164 return XFS_ERROR(EINVAL);
165 }
166 new = nb - mp->m_sb.sb_dblocks;
167 oagcount = mp->m_sb.sb_agcount;
168
169 /* allocate the new per-ag structures */
170 if (nagcount > oagcount) {
171 error = xfs_initialize_perag(mp, nagcount, &nagimax);
172 if (error)
173 return error;
174 }
175
176 tp = xfs_trans_alloc(mp, XFS_TRANS_GROWFS);
177 tp->t_flags |= XFS_TRANS_RESERVE;
178 if ((error = xfs_trans_reserve(tp, XFS_GROWFS_SPACE_RES(mp),
179 XFS_GROWDATA_LOG_RES(mp), 0, 0, 0))) {
180 xfs_trans_cancel(tp, 0);
181 return error;
182 }
183
184 /*
185 * Write new AG headers to disk. Non-transactional, but written
186 * synchronously so they are completed prior to the growfs transaction
187 * being logged.
188 */
189 nfree = 0;
190 for (agno = nagcount - 1; agno >= oagcount; agno--, new -= agsize) {
191 /*
192 * AG freelist header block
193 */
194 bp = xfs_buf_get(mp->m_ddev_targp,
195 XFS_AG_DADDR(mp, agno, XFS_AGF_DADDR(mp)),
196 XFS_FSS_TO_BB(mp, 1), XBF_LOCK | XBF_MAPPED);
197 agf = XFS_BUF_TO_AGF(bp);
198 memset(agf, 0, mp->m_sb.sb_sectsize);
199 agf->agf_magicnum = cpu_to_be32(XFS_AGF_MAGIC);
200 agf->agf_versionnum = cpu_to_be32(XFS_AGF_VERSION);
201 agf->agf_seqno = cpu_to_be32(agno);
202 if (agno == nagcount - 1)
203 agsize =
204 nb -
205 (agno * (xfs_rfsblock_t)mp->m_sb.sb_agblocks);
206 else
207 agsize = mp->m_sb.sb_agblocks;
208 agf->agf_length = cpu_to_be32(agsize);
209 agf->agf_roots[XFS_BTNUM_BNOi] = cpu_to_be32(XFS_BNO_BLOCK(mp));
210 agf->agf_roots[XFS_BTNUM_CNTi] = cpu_to_be32(XFS_CNT_BLOCK(mp));
211 agf->agf_levels[XFS_BTNUM_BNOi] = cpu_to_be32(1);
212 agf->agf_levels[XFS_BTNUM_CNTi] = cpu_to_be32(1);
213 agf->agf_flfirst = 0;
214 agf->agf_fllast = cpu_to_be32(XFS_AGFL_SIZE(mp) - 1);
215 agf->agf_flcount = 0;
216 tmpsize = agsize - XFS_PREALLOC_BLOCKS(mp);
217 agf->agf_freeblks = cpu_to_be32(tmpsize);
218 agf->agf_longest = cpu_to_be32(tmpsize);
219 error = xfs_bwrite(mp, bp);
220 if (error) {
221 goto error0;
222 }
223 /*
224 * AG inode header block
225 */
226 bp = xfs_buf_get(mp->m_ddev_targp,
227 XFS_AG_DADDR(mp, agno, XFS_AGI_DADDR(mp)),
228 XFS_FSS_TO_BB(mp, 1), XBF_LOCK | XBF_MAPPED);
229 agi = XFS_BUF_TO_AGI(bp);
230 memset(agi, 0, mp->m_sb.sb_sectsize);
231 agi->agi_magicnum = cpu_to_be32(XFS_AGI_MAGIC);
232 agi->agi_versionnum = cpu_to_be32(XFS_AGI_VERSION);
233 agi->agi_seqno = cpu_to_be32(agno);
234 agi->agi_length = cpu_to_be32(agsize);
235 agi->agi_count = 0;
236 agi->agi_root = cpu_to_be32(XFS_IBT_BLOCK(mp));
237 agi->agi_level = cpu_to_be32(1);
238 agi->agi_freecount = 0;
239 agi->agi_newino = cpu_to_be32(NULLAGINO);
240 agi->agi_dirino = cpu_to_be32(NULLAGINO);
241 for (bucket = 0; bucket < XFS_AGI_UNLINKED_BUCKETS; bucket++)
242 agi->agi_unlinked[bucket] = cpu_to_be32(NULLAGINO);
243 error = xfs_bwrite(mp, bp);
244 if (error) {
245 goto error0;
246 }
247 /*
248 * BNO btree root block
249 */
250 bp = xfs_buf_get(mp->m_ddev_targp,
251 XFS_AGB_TO_DADDR(mp, agno, XFS_BNO_BLOCK(mp)),
252 BTOBB(mp->m_sb.sb_blocksize),
253 XBF_LOCK | XBF_MAPPED);
254 block = XFS_BUF_TO_BLOCK(bp);
255 memset(block, 0, mp->m_sb.sb_blocksize);
256 block->bb_magic = cpu_to_be32(XFS_ABTB_MAGIC);
257 block->bb_level = 0;
258 block->bb_numrecs = cpu_to_be16(1);
259 block->bb_u.s.bb_leftsib = cpu_to_be32(NULLAGBLOCK);
260 block->bb_u.s.bb_rightsib = cpu_to_be32(NULLAGBLOCK);
261 arec = XFS_ALLOC_REC_ADDR(mp, block, 1);
262 arec->ar_startblock = cpu_to_be32(XFS_PREALLOC_BLOCKS(mp));
263 arec->ar_blockcount = cpu_to_be32(
264 agsize - be32_to_cpu(arec->ar_startblock));
265 error = xfs_bwrite(mp, bp);
266 if (error) {
267 goto error0;
268 }
269 /*
270 * CNT btree root block
271 */
272 bp = xfs_buf_get(mp->m_ddev_targp,
273 XFS_AGB_TO_DADDR(mp, agno, XFS_CNT_BLOCK(mp)),
274 BTOBB(mp->m_sb.sb_blocksize),
275 XBF_LOCK | XBF_MAPPED);
276 block = XFS_BUF_TO_BLOCK(bp);
277 memset(block, 0, mp->m_sb.sb_blocksize);
278 block->bb_magic = cpu_to_be32(XFS_ABTC_MAGIC);
279 block->bb_level = 0;
280 block->bb_numrecs = cpu_to_be16(1);
281 block->bb_u.s.bb_leftsib = cpu_to_be32(NULLAGBLOCK);
282 block->bb_u.s.bb_rightsib = cpu_to_be32(NULLAGBLOCK);
283 arec = XFS_ALLOC_REC_ADDR(mp, block, 1);
284 arec->ar_startblock = cpu_to_be32(XFS_PREALLOC_BLOCKS(mp));
285 arec->ar_blockcount = cpu_to_be32(
286 agsize - be32_to_cpu(arec->ar_startblock));
287 nfree += be32_to_cpu(arec->ar_blockcount);
288 error = xfs_bwrite(mp, bp);
289 if (error) {
290 goto error0;
291 }
292 /*
293 * INO btree root block
294 */
295 bp = xfs_buf_get(mp->m_ddev_targp,
296 XFS_AGB_TO_DADDR(mp, agno, XFS_IBT_BLOCK(mp)),
297 BTOBB(mp->m_sb.sb_blocksize),
298 XBF_LOCK | XBF_MAPPED);
299 block = XFS_BUF_TO_BLOCK(bp);
300 memset(block, 0, mp->m_sb.sb_blocksize);
301 block->bb_magic = cpu_to_be32(XFS_IBT_MAGIC);
302 block->bb_level = 0;
303 block->bb_numrecs = 0;
304 block->bb_u.s.bb_leftsib = cpu_to_be32(NULLAGBLOCK);
305 block->bb_u.s.bb_rightsib = cpu_to_be32(NULLAGBLOCK);
306 error = xfs_bwrite(mp, bp);
307 if (error) {
308 goto error0;
309 }
310 }
311 xfs_trans_agblocks_delta(tp, nfree);
312 /*
313 * There are new blocks in the old last a.g.
314 */
315 if (new) {
316 /*
317 * Change the agi length.
318 */
319 error = xfs_ialloc_read_agi(mp, tp, agno, &bp);
320 if (error) {
321 goto error0;
322 }
323 ASSERT(bp);
324 agi = XFS_BUF_TO_AGI(bp);
325 be32_add_cpu(&agi->agi_length, new);
326 ASSERT(nagcount == oagcount ||
327 be32_to_cpu(agi->agi_length) == mp->m_sb.sb_agblocks);
328 xfs_ialloc_log_agi(tp, bp, XFS_AGI_LENGTH);
329 /*
330 * Change agf length.
331 */
332 error = xfs_alloc_read_agf(mp, tp, agno, 0, &bp);
333 if (error) {
334 goto error0;
335 }
336 ASSERT(bp);
337 agf = XFS_BUF_TO_AGF(bp);
338 be32_add_cpu(&agf->agf_length, new);
339 ASSERT(be32_to_cpu(agf->agf_length) ==
340 be32_to_cpu(agi->agi_length));
341
342 xfs_alloc_log_agf(tp, bp, XFS_AGF_LENGTH);
343 /*
344 * Free the new space.
345 */
346 error = xfs_free_extent(tp, XFS_AGB_TO_FSB(mp, agno,
347 be32_to_cpu(agf->agf_length) - new), new);
348 if (error) {
349 goto error0;
350 }
351 }
352
353 /*
354 * Update changed superblock fields transactionally. These are not
355 * seen by the rest of the world until the transaction commit applies
356 * them atomically to the superblock.
357 */
358 if (nagcount > oagcount)
359 xfs_trans_mod_sb(tp, XFS_TRANS_SB_AGCOUNT, nagcount - oagcount);
360 if (nb > mp->m_sb.sb_dblocks)
361 xfs_trans_mod_sb(tp, XFS_TRANS_SB_DBLOCKS,
362 nb - mp->m_sb.sb_dblocks);
363 if (nfree)
364 xfs_trans_mod_sb(tp, XFS_TRANS_SB_FDBLOCKS, nfree);
365 if (dpct)
366 xfs_trans_mod_sb(tp, XFS_TRANS_SB_IMAXPCT, dpct);
367 error = xfs_trans_commit(tp, 0);
368 if (error)
369 return error;
370
371 /* New allocation groups fully initialized, so update mount struct */
372 if (nagimax)
373 mp->m_maxagi = nagimax;
374 if (mp->m_sb.sb_imax_pct) {
375 __uint64_t icount = mp->m_sb.sb_dblocks * mp->m_sb.sb_imax_pct;
376 do_div(icount, 100);
377 mp->m_maxicount = icount << mp->m_sb.sb_inopblog;
378 } else
379 mp->m_maxicount = 0;
380 xfs_set_low_space_thresholds(mp);
381
382 /* update secondary superblocks. */
383 for (agno = 1; agno < nagcount; agno++) {
384 error = xfs_read_buf(mp, mp->m_ddev_targp,
385 XFS_AGB_TO_DADDR(mp, agno, XFS_SB_BLOCK(mp)),
386 XFS_FSS_TO_BB(mp, 1), 0, &bp);
387 if (error) {
388 xfs_warn(mp,
389 "error %d reading secondary superblock for ag %d",
390 error, agno);
391 break;
392 }
393 xfs_sb_to_disk(XFS_BUF_TO_SBP(bp), &mp->m_sb, XFS_SB_ALL_BITS);
394 /*
395 * If we get an error writing out the alternate superblocks,
396 * just issue a warning and continue. The real work is
397 * already done and committed.
398 */
399 if (!(error = xfs_bwrite(mp, bp))) {
400 continue;
401 } else {
402 xfs_warn(mp,
403 "write error %d updating secondary superblock for ag %d",
404 error, agno);
405 break; /* no point in continuing */
406 }
407 }
408 return 0;
409
410 error0:
411 xfs_trans_cancel(tp, XFS_TRANS_ABORT);
412 return error;
413}
414
415static int
416xfs_growfs_log_private(
417 xfs_mount_t *mp, /* mount point for filesystem */
418 xfs_growfs_log_t *in) /* growfs log input struct */
419{
420 xfs_extlen_t nb;
421
422 nb = in->newblocks;
423 if (nb < XFS_MIN_LOG_BLOCKS || nb < XFS_B_TO_FSB(mp, XFS_MIN_LOG_BYTES))
424 return XFS_ERROR(EINVAL);
425 if (nb == mp->m_sb.sb_logblocks &&
426 in->isint == (mp->m_sb.sb_logstart != 0))
427 return XFS_ERROR(EINVAL);
428 /*
429 * Moving the log is hard, need new interfaces to sync
430 * the log first, hold off all activity while moving it.
431 * Can have shorter or longer log in the same space,
432 * or transform internal to external log or vice versa.
433 */
434 return XFS_ERROR(ENOSYS);
435}
436
437/*
438 * protected versions of growfs function acquire and release locks on the mount
439 * point - exported through ioctls: XFS_IOC_FSGROWFSDATA, XFS_IOC_FSGROWFSLOG,
440 * XFS_IOC_FSGROWFSRT
441 */
442
443
444int
445xfs_growfs_data(
446 xfs_mount_t *mp,
447 xfs_growfs_data_t *in)
448{
449 int error;
450
451 if (!capable(CAP_SYS_ADMIN))
452 return XFS_ERROR(EPERM);
453 if (!mutex_trylock(&mp->m_growlock))
454 return XFS_ERROR(EWOULDBLOCK);
455 error = xfs_growfs_data_private(mp, in);
456 mutex_unlock(&mp->m_growlock);
457 return error;
458}
459
460int
461xfs_growfs_log(
462 xfs_mount_t *mp,
463 xfs_growfs_log_t *in)
464{
465 int error;
466
467 if (!capable(CAP_SYS_ADMIN))
468 return XFS_ERROR(EPERM);
469 if (!mutex_trylock(&mp->m_growlock))
470 return XFS_ERROR(EWOULDBLOCK);
471 error = xfs_growfs_log_private(mp, in);
472 mutex_unlock(&mp->m_growlock);
473 return error;
474}
475
476/*
477 * exported through ioctl XFS_IOC_FSCOUNTS
478 */
479
480int
481xfs_fs_counts(
482 xfs_mount_t *mp,
483 xfs_fsop_counts_t *cnt)
484{
485 xfs_icsb_sync_counters(mp, XFS_ICSB_LAZY_COUNT);
486 spin_lock(&mp->m_sb_lock);
487 cnt->freedata = mp->m_sb.sb_fdblocks - XFS_ALLOC_SET_ASIDE(mp);
488 cnt->freertx = mp->m_sb.sb_frextents;
489 cnt->freeino = mp->m_sb.sb_ifree;
490 cnt->allocino = mp->m_sb.sb_icount;
491 spin_unlock(&mp->m_sb_lock);
492 return 0;
493}
494
495/*
496 * exported through ioctl XFS_IOC_SET_RESBLKS & XFS_IOC_GET_RESBLKS
497 *
498 * xfs_reserve_blocks is called to set m_resblks
499 * in the in-core mount table. The number of unused reserved blocks
500 * is kept in m_resblks_avail.
501 *
502 * Reserve the requested number of blocks if available. Otherwise return
503 * as many as possible to satisfy the request. The actual number
504 * reserved are returned in outval
505 *
506 * A null inval pointer indicates that only the current reserved blocks
507 * available should be returned no settings are changed.
508 */
509
510int
511xfs_reserve_blocks(
512 xfs_mount_t *mp,
513 __uint64_t *inval,
514 xfs_fsop_resblks_t *outval)
515{
516 __int64_t lcounter, delta, fdblks_delta;
517 __uint64_t request;
518
519 /* If inval is null, report current values and return */
520 if (inval == (__uint64_t *)NULL) {
521 if (!outval)
522 return EINVAL;
523 outval->resblks = mp->m_resblks;
524 outval->resblks_avail = mp->m_resblks_avail;
525 return 0;
526 }
527
528 request = *inval;
529
530 /*
531 * With per-cpu counters, this becomes an interesting
532 * problem. we needto work out if we are freeing or allocation
533 * blocks first, then we can do the modification as necessary.
534 *
535 * We do this under the m_sb_lock so that if we are near
536 * ENOSPC, we will hold out any changes while we work out
537 * what to do. This means that the amount of free space can
538 * change while we do this, so we need to retry if we end up
539 * trying to reserve more space than is available.
540 *
541 * We also use the xfs_mod_incore_sb() interface so that we
542 * don't have to care about whether per cpu counter are
543 * enabled, disabled or even compiled in....
544 */
545retry:
546 spin_lock(&mp->m_sb_lock);
547 xfs_icsb_sync_counters_locked(mp, 0);
548
549 /*
550 * If our previous reservation was larger than the current value,
551 * then move any unused blocks back to the free pool.
552 */
553 fdblks_delta = 0;
554 if (mp->m_resblks > request) {
555 lcounter = mp->m_resblks_avail - request;
556 if (lcounter > 0) { /* release unused blocks */
557 fdblks_delta = lcounter;
558 mp->m_resblks_avail -= lcounter;
559 }
560 mp->m_resblks = request;
561 } else {
562 __int64_t free;
563
564 free = mp->m_sb.sb_fdblocks - XFS_ALLOC_SET_ASIDE(mp);
565 if (!free)
566 goto out; /* ENOSPC and fdblks_delta = 0 */
567
568 delta = request - mp->m_resblks;
569 lcounter = free - delta;
570 if (lcounter < 0) {
571 /* We can't satisfy the request, just get what we can */
572 mp->m_resblks += free;
573 mp->m_resblks_avail += free;
574 fdblks_delta = -free;
575 } else {
576 fdblks_delta = -delta;
577 mp->m_resblks = request;
578 mp->m_resblks_avail += delta;
579 }
580 }
581out:
582 if (outval) {
583 outval->resblks = mp->m_resblks;
584 outval->resblks_avail = mp->m_resblks_avail;
585 }
586 spin_unlock(&mp->m_sb_lock);
587
588 if (fdblks_delta) {
589 /*
590 * If we are putting blocks back here, m_resblks_avail is
591 * already at its max so this will put it in the free pool.
592 *
593 * If we need space, we'll either succeed in getting it
594 * from the free block count or we'll get an enospc. If
595 * we get a ENOSPC, it means things changed while we were
596 * calculating fdblks_delta and so we should try again to
597 * see if there is anything left to reserve.
598 *
599 * Don't set the reserved flag here - we don't want to reserve
600 * the extra reserve blocks from the reserve.....
601 */
602 int error;
603 error = xfs_icsb_modify_counters(mp, XFS_SBS_FDBLOCKS,
604 fdblks_delta, 0);
605 if (error == ENOSPC)
606 goto retry;
607 }
608 return 0;
609}
610
611/*
612 * Dump a transaction into the log that contains no real change. This is needed
613 * to be able to make the log dirty or stamp the current tail LSN into the log
614 * during the covering operation.
615 *
616 * We cannot use an inode here for this - that will push dirty state back up
617 * into the VFS and then periodic inode flushing will prevent log covering from
618 * making progress. Hence we log a field in the superblock instead and use a
619 * synchronous transaction to ensure the superblock is immediately unpinned
620 * and can be written back.
621 */
622int
623xfs_fs_log_dummy(
624 xfs_mount_t *mp)
625{
626 xfs_trans_t *tp;
627 int error;
628
629 tp = _xfs_trans_alloc(mp, XFS_TRANS_DUMMY1, KM_SLEEP);
630 error = xfs_trans_reserve(tp, 0, mp->m_sb.sb_sectsize + 128, 0, 0,
631 XFS_DEFAULT_LOG_COUNT);
632 if (error) {
633 xfs_trans_cancel(tp, 0);
634 return error;
635 }
636
637 /* log the UUID because it is an unchanging field */
638 xfs_mod_sb(tp, XFS_SB_UUID);
639 xfs_trans_set_sync(tp);
640 return xfs_trans_commit(tp, 0);
641}
642
643int
644xfs_fs_goingdown(
645 xfs_mount_t *mp,
646 __uint32_t inflags)
647{
648 switch (inflags) {
649 case XFS_FSOP_GOING_FLAGS_DEFAULT: {
650 struct super_block *sb = freeze_bdev(mp->m_super->s_bdev);
651
652 if (sb && !IS_ERR(sb)) {
653 xfs_force_shutdown(mp, SHUTDOWN_FORCE_UMOUNT);
654 thaw_bdev(sb->s_bdev, sb);
655 }
656
657 break;
658 }
659 case XFS_FSOP_GOING_FLAGS_LOGFLUSH:
660 xfs_force_shutdown(mp, SHUTDOWN_FORCE_UMOUNT);
661 break;
662 case XFS_FSOP_GOING_FLAGS_NOLOGFLUSH:
663 xfs_force_shutdown(mp,
664 SHUTDOWN_FORCE_UMOUNT | SHUTDOWN_LOG_IO_ERROR);
665 break;
666 default:
667 return XFS_ERROR(EINVAL);
668 }
669
670 return 0;
671}
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_shared.h"
21#include "xfs_format.h"
22#include "xfs_log_format.h"
23#include "xfs_trans_resv.h"
24#include "xfs_sb.h"
25#include "xfs_mount.h"
26#include "xfs_defer.h"
27#include "xfs_da_format.h"
28#include "xfs_da_btree.h"
29#include "xfs_inode.h"
30#include "xfs_trans.h"
31#include "xfs_inode_item.h"
32#include "xfs_error.h"
33#include "xfs_btree.h"
34#include "xfs_alloc_btree.h"
35#include "xfs_alloc.h"
36#include "xfs_rmap_btree.h"
37#include "xfs_ialloc.h"
38#include "xfs_fsops.h"
39#include "xfs_itable.h"
40#include "xfs_trans_space.h"
41#include "xfs_rtalloc.h"
42#include "xfs_trace.h"
43#include "xfs_log.h"
44#include "xfs_filestream.h"
45#include "xfs_rmap.h"
46#include "xfs_ag_resv.h"
47
48/*
49 * File system operations
50 */
51
52int
53xfs_fs_geometry(
54 xfs_mount_t *mp,
55 xfs_fsop_geom_t *geo,
56 int new_version)
57{
58
59 memset(geo, 0, sizeof(*geo));
60
61 geo->blocksize = mp->m_sb.sb_blocksize;
62 geo->rtextsize = mp->m_sb.sb_rextsize;
63 geo->agblocks = mp->m_sb.sb_agblocks;
64 geo->agcount = mp->m_sb.sb_agcount;
65 geo->logblocks = mp->m_sb.sb_logblocks;
66 geo->sectsize = mp->m_sb.sb_sectsize;
67 geo->inodesize = mp->m_sb.sb_inodesize;
68 geo->imaxpct = mp->m_sb.sb_imax_pct;
69 geo->datablocks = mp->m_sb.sb_dblocks;
70 geo->rtblocks = mp->m_sb.sb_rblocks;
71 geo->rtextents = mp->m_sb.sb_rextents;
72 geo->logstart = mp->m_sb.sb_logstart;
73 ASSERT(sizeof(geo->uuid)==sizeof(mp->m_sb.sb_uuid));
74 memcpy(geo->uuid, &mp->m_sb.sb_uuid, sizeof(mp->m_sb.sb_uuid));
75 if (new_version >= 2) {
76 geo->sunit = mp->m_sb.sb_unit;
77 geo->swidth = mp->m_sb.sb_width;
78 }
79 if (new_version >= 3) {
80 geo->version = XFS_FSOP_GEOM_VERSION;
81 geo->flags = XFS_FSOP_GEOM_FLAGS_NLINK |
82 XFS_FSOP_GEOM_FLAGS_DIRV2 |
83 (xfs_sb_version_hasattr(&mp->m_sb) ?
84 XFS_FSOP_GEOM_FLAGS_ATTR : 0) |
85 (xfs_sb_version_hasquota(&mp->m_sb) ?
86 XFS_FSOP_GEOM_FLAGS_QUOTA : 0) |
87 (xfs_sb_version_hasalign(&mp->m_sb) ?
88 XFS_FSOP_GEOM_FLAGS_IALIGN : 0) |
89 (xfs_sb_version_hasdalign(&mp->m_sb) ?
90 XFS_FSOP_GEOM_FLAGS_DALIGN : 0) |
91 (xfs_sb_version_hasextflgbit(&mp->m_sb) ?
92 XFS_FSOP_GEOM_FLAGS_EXTFLG : 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 (xfs_sb_version_hascrc(&mp->m_sb) ?
104 XFS_FSOP_GEOM_FLAGS_V5SB : 0) |
105 (xfs_sb_version_hasftype(&mp->m_sb) ?
106 XFS_FSOP_GEOM_FLAGS_FTYPE : 0) |
107 (xfs_sb_version_hasfinobt(&mp->m_sb) ?
108 XFS_FSOP_GEOM_FLAGS_FINOBT : 0) |
109 (xfs_sb_version_hassparseinodes(&mp->m_sb) ?
110 XFS_FSOP_GEOM_FLAGS_SPINODES : 0) |
111 (xfs_sb_version_hasrmapbt(&mp->m_sb) ?
112 XFS_FSOP_GEOM_FLAGS_RMAPBT : 0) |
113 (xfs_sb_version_hasreflink(&mp->m_sb) ?
114 XFS_FSOP_GEOM_FLAGS_REFLINK : 0);
115 geo->logsectsize = xfs_sb_version_hassector(&mp->m_sb) ?
116 mp->m_sb.sb_logsectsize : BBSIZE;
117 geo->rtsectsize = mp->m_sb.sb_blocksize;
118 geo->dirblocksize = mp->m_dir_geo->blksize;
119 }
120 if (new_version >= 4) {
121 geo->flags |=
122 (xfs_sb_version_haslogv2(&mp->m_sb) ?
123 XFS_FSOP_GEOM_FLAGS_LOGV2 : 0);
124 geo->logsunit = mp->m_sb.sb_logsunit;
125 }
126 return 0;
127}
128
129static struct xfs_buf *
130xfs_growfs_get_hdr_buf(
131 struct xfs_mount *mp,
132 xfs_daddr_t blkno,
133 size_t numblks,
134 int flags,
135 const struct xfs_buf_ops *ops)
136{
137 struct xfs_buf *bp;
138
139 bp = xfs_buf_get_uncached(mp->m_ddev_targp, numblks, flags);
140 if (!bp)
141 return NULL;
142
143 xfs_buf_zero(bp, 0, BBTOB(bp->b_length));
144 bp->b_bn = blkno;
145 bp->b_maps[0].bm_bn = blkno;
146 bp->b_ops = ops;
147
148 return bp;
149}
150
151static int
152xfs_growfs_data_private(
153 xfs_mount_t *mp, /* mount point for filesystem */
154 xfs_growfs_data_t *in) /* growfs data input struct */
155{
156 xfs_agf_t *agf;
157 struct xfs_agfl *agfl;
158 xfs_agi_t *agi;
159 xfs_agnumber_t agno;
160 xfs_extlen_t agsize;
161 xfs_extlen_t tmpsize;
162 xfs_alloc_rec_t *arec;
163 xfs_buf_t *bp;
164 int bucket;
165 int dpct;
166 int error, saved_error = 0;
167 xfs_agnumber_t nagcount;
168 xfs_agnumber_t nagimax = 0;
169 xfs_rfsblock_t nb, nb_mod;
170 xfs_rfsblock_t new;
171 xfs_rfsblock_t nfree;
172 xfs_agnumber_t oagcount;
173 int pct;
174 xfs_trans_t *tp;
175
176 nb = in->newblocks;
177 pct = in->imaxpct;
178 if (nb < mp->m_sb.sb_dblocks || pct < 0 || pct > 100)
179 return -EINVAL;
180 if ((error = xfs_sb_validate_fsb_count(&mp->m_sb, nb)))
181 return error;
182 dpct = pct - mp->m_sb.sb_imax_pct;
183 error = xfs_buf_read_uncached(mp->m_ddev_targp,
184 XFS_FSB_TO_BB(mp, nb) - XFS_FSS_TO_BB(mp, 1),
185 XFS_FSS_TO_BB(mp, 1), 0, &bp, NULL);
186 if (error)
187 return error;
188 xfs_buf_relse(bp);
189
190 new = nb; /* use new as a temporary here */
191 nb_mod = do_div(new, mp->m_sb.sb_agblocks);
192 nagcount = new + (nb_mod != 0);
193 if (nb_mod && nb_mod < XFS_MIN_AG_BLOCKS) {
194 nagcount--;
195 nb = (xfs_rfsblock_t)nagcount * mp->m_sb.sb_agblocks;
196 if (nb < mp->m_sb.sb_dblocks)
197 return -EINVAL;
198 }
199 new = nb - mp->m_sb.sb_dblocks;
200 oagcount = mp->m_sb.sb_agcount;
201
202 /* allocate the new per-ag structures */
203 if (nagcount > oagcount) {
204 error = xfs_initialize_perag(mp, nagcount, &nagimax);
205 if (error)
206 return error;
207 }
208
209 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_growdata,
210 XFS_GROWFS_SPACE_RES(mp), 0, XFS_TRANS_RESERVE, &tp);
211 if (error)
212 return error;
213
214 /*
215 * Write new AG headers to disk. Non-transactional, but written
216 * synchronously so they are completed prior to the growfs transaction
217 * being logged.
218 */
219 nfree = 0;
220 for (agno = nagcount - 1; agno >= oagcount; agno--, new -= agsize) {
221 __be32 *agfl_bno;
222
223 /*
224 * AG freespace header block
225 */
226 bp = xfs_growfs_get_hdr_buf(mp,
227 XFS_AG_DADDR(mp, agno, XFS_AGF_DADDR(mp)),
228 XFS_FSS_TO_BB(mp, 1), 0,
229 &xfs_agf_buf_ops);
230 if (!bp) {
231 error = -ENOMEM;
232 goto error0;
233 }
234
235 agf = XFS_BUF_TO_AGF(bp);
236 agf->agf_magicnum = cpu_to_be32(XFS_AGF_MAGIC);
237 agf->agf_versionnum = cpu_to_be32(XFS_AGF_VERSION);
238 agf->agf_seqno = cpu_to_be32(agno);
239 if (agno == nagcount - 1)
240 agsize =
241 nb -
242 (agno * (xfs_rfsblock_t)mp->m_sb.sb_agblocks);
243 else
244 agsize = mp->m_sb.sb_agblocks;
245 agf->agf_length = cpu_to_be32(agsize);
246 agf->agf_roots[XFS_BTNUM_BNOi] = cpu_to_be32(XFS_BNO_BLOCK(mp));
247 agf->agf_roots[XFS_BTNUM_CNTi] = cpu_to_be32(XFS_CNT_BLOCK(mp));
248 agf->agf_levels[XFS_BTNUM_BNOi] = cpu_to_be32(1);
249 agf->agf_levels[XFS_BTNUM_CNTi] = cpu_to_be32(1);
250 if (xfs_sb_version_hasrmapbt(&mp->m_sb)) {
251 agf->agf_roots[XFS_BTNUM_RMAPi] =
252 cpu_to_be32(XFS_RMAP_BLOCK(mp));
253 agf->agf_levels[XFS_BTNUM_RMAPi] = cpu_to_be32(1);
254 agf->agf_rmap_blocks = cpu_to_be32(1);
255 }
256
257 agf->agf_flfirst = cpu_to_be32(1);
258 agf->agf_fllast = 0;
259 agf->agf_flcount = 0;
260 tmpsize = agsize - mp->m_ag_prealloc_blocks;
261 agf->agf_freeblks = cpu_to_be32(tmpsize);
262 agf->agf_longest = cpu_to_be32(tmpsize);
263 if (xfs_sb_version_hascrc(&mp->m_sb))
264 uuid_copy(&agf->agf_uuid, &mp->m_sb.sb_meta_uuid);
265 if (xfs_sb_version_hasreflink(&mp->m_sb)) {
266 agf->agf_refcount_root = cpu_to_be32(
267 xfs_refc_block(mp));
268 agf->agf_refcount_level = cpu_to_be32(1);
269 agf->agf_refcount_blocks = cpu_to_be32(1);
270 }
271
272 error = xfs_bwrite(bp);
273 xfs_buf_relse(bp);
274 if (error)
275 goto error0;
276
277 /*
278 * AG freelist header block
279 */
280 bp = xfs_growfs_get_hdr_buf(mp,
281 XFS_AG_DADDR(mp, agno, XFS_AGFL_DADDR(mp)),
282 XFS_FSS_TO_BB(mp, 1), 0,
283 &xfs_agfl_buf_ops);
284 if (!bp) {
285 error = -ENOMEM;
286 goto error0;
287 }
288
289 agfl = XFS_BUF_TO_AGFL(bp);
290 if (xfs_sb_version_hascrc(&mp->m_sb)) {
291 agfl->agfl_magicnum = cpu_to_be32(XFS_AGFL_MAGIC);
292 agfl->agfl_seqno = cpu_to_be32(agno);
293 uuid_copy(&agfl->agfl_uuid, &mp->m_sb.sb_meta_uuid);
294 }
295
296 agfl_bno = XFS_BUF_TO_AGFL_BNO(mp, bp);
297 for (bucket = 0; bucket < XFS_AGFL_SIZE(mp); bucket++)
298 agfl_bno[bucket] = cpu_to_be32(NULLAGBLOCK);
299
300 error = xfs_bwrite(bp);
301 xfs_buf_relse(bp);
302 if (error)
303 goto error0;
304
305 /*
306 * AG inode header block
307 */
308 bp = xfs_growfs_get_hdr_buf(mp,
309 XFS_AG_DADDR(mp, agno, XFS_AGI_DADDR(mp)),
310 XFS_FSS_TO_BB(mp, 1), 0,
311 &xfs_agi_buf_ops);
312 if (!bp) {
313 error = -ENOMEM;
314 goto error0;
315 }
316
317 agi = XFS_BUF_TO_AGI(bp);
318 agi->agi_magicnum = cpu_to_be32(XFS_AGI_MAGIC);
319 agi->agi_versionnum = cpu_to_be32(XFS_AGI_VERSION);
320 agi->agi_seqno = cpu_to_be32(agno);
321 agi->agi_length = cpu_to_be32(agsize);
322 agi->agi_count = 0;
323 agi->agi_root = cpu_to_be32(XFS_IBT_BLOCK(mp));
324 agi->agi_level = cpu_to_be32(1);
325 agi->agi_freecount = 0;
326 agi->agi_newino = cpu_to_be32(NULLAGINO);
327 agi->agi_dirino = cpu_to_be32(NULLAGINO);
328 if (xfs_sb_version_hascrc(&mp->m_sb))
329 uuid_copy(&agi->agi_uuid, &mp->m_sb.sb_meta_uuid);
330 if (xfs_sb_version_hasfinobt(&mp->m_sb)) {
331 agi->agi_free_root = cpu_to_be32(XFS_FIBT_BLOCK(mp));
332 agi->agi_free_level = cpu_to_be32(1);
333 }
334 for (bucket = 0; bucket < XFS_AGI_UNLINKED_BUCKETS; bucket++)
335 agi->agi_unlinked[bucket] = cpu_to_be32(NULLAGINO);
336
337 error = xfs_bwrite(bp);
338 xfs_buf_relse(bp);
339 if (error)
340 goto error0;
341
342 /*
343 * BNO btree root block
344 */
345 bp = xfs_growfs_get_hdr_buf(mp,
346 XFS_AGB_TO_DADDR(mp, agno, XFS_BNO_BLOCK(mp)),
347 BTOBB(mp->m_sb.sb_blocksize), 0,
348 &xfs_allocbt_buf_ops);
349
350 if (!bp) {
351 error = -ENOMEM;
352 goto error0;
353 }
354
355 if (xfs_sb_version_hascrc(&mp->m_sb))
356 xfs_btree_init_block(mp, bp, XFS_ABTB_CRC_MAGIC, 0, 1,
357 agno, XFS_BTREE_CRC_BLOCKS);
358 else
359 xfs_btree_init_block(mp, bp, XFS_ABTB_MAGIC, 0, 1,
360 agno, 0);
361
362 arec = XFS_ALLOC_REC_ADDR(mp, XFS_BUF_TO_BLOCK(bp), 1);
363 arec->ar_startblock = cpu_to_be32(mp->m_ag_prealloc_blocks);
364 arec->ar_blockcount = cpu_to_be32(
365 agsize - be32_to_cpu(arec->ar_startblock));
366
367 error = xfs_bwrite(bp);
368 xfs_buf_relse(bp);
369 if (error)
370 goto error0;
371
372 /*
373 * CNT btree root block
374 */
375 bp = xfs_growfs_get_hdr_buf(mp,
376 XFS_AGB_TO_DADDR(mp, agno, XFS_CNT_BLOCK(mp)),
377 BTOBB(mp->m_sb.sb_blocksize), 0,
378 &xfs_allocbt_buf_ops);
379 if (!bp) {
380 error = -ENOMEM;
381 goto error0;
382 }
383
384 if (xfs_sb_version_hascrc(&mp->m_sb))
385 xfs_btree_init_block(mp, bp, XFS_ABTC_CRC_MAGIC, 0, 1,
386 agno, XFS_BTREE_CRC_BLOCKS);
387 else
388 xfs_btree_init_block(mp, bp, XFS_ABTC_MAGIC, 0, 1,
389 agno, 0);
390
391 arec = XFS_ALLOC_REC_ADDR(mp, XFS_BUF_TO_BLOCK(bp), 1);
392 arec->ar_startblock = cpu_to_be32(mp->m_ag_prealloc_blocks);
393 arec->ar_blockcount = cpu_to_be32(
394 agsize - be32_to_cpu(arec->ar_startblock));
395 nfree += be32_to_cpu(arec->ar_blockcount);
396
397 error = xfs_bwrite(bp);
398 xfs_buf_relse(bp);
399 if (error)
400 goto error0;
401
402 /* RMAP btree root block */
403 if (xfs_sb_version_hasrmapbt(&mp->m_sb)) {
404 struct xfs_rmap_rec *rrec;
405 struct xfs_btree_block *block;
406
407 bp = xfs_growfs_get_hdr_buf(mp,
408 XFS_AGB_TO_DADDR(mp, agno, XFS_RMAP_BLOCK(mp)),
409 BTOBB(mp->m_sb.sb_blocksize), 0,
410 &xfs_rmapbt_buf_ops);
411 if (!bp) {
412 error = -ENOMEM;
413 goto error0;
414 }
415
416 xfs_btree_init_block(mp, bp, XFS_RMAP_CRC_MAGIC, 0, 0,
417 agno, XFS_BTREE_CRC_BLOCKS);
418 block = XFS_BUF_TO_BLOCK(bp);
419
420
421 /*
422 * mark the AG header regions as static metadata The BNO
423 * btree block is the first block after the headers, so
424 * it's location defines the size of region the static
425 * metadata consumes.
426 *
427 * Note: unlike mkfs, we never have to account for log
428 * space when growing the data regions
429 */
430 rrec = XFS_RMAP_REC_ADDR(block, 1);
431 rrec->rm_startblock = 0;
432 rrec->rm_blockcount = cpu_to_be32(XFS_BNO_BLOCK(mp));
433 rrec->rm_owner = cpu_to_be64(XFS_RMAP_OWN_FS);
434 rrec->rm_offset = 0;
435 be16_add_cpu(&block->bb_numrecs, 1);
436
437 /* account freespace btree root blocks */
438 rrec = XFS_RMAP_REC_ADDR(block, 2);
439 rrec->rm_startblock = cpu_to_be32(XFS_BNO_BLOCK(mp));
440 rrec->rm_blockcount = cpu_to_be32(2);
441 rrec->rm_owner = cpu_to_be64(XFS_RMAP_OWN_AG);
442 rrec->rm_offset = 0;
443 be16_add_cpu(&block->bb_numrecs, 1);
444
445 /* account inode btree root blocks */
446 rrec = XFS_RMAP_REC_ADDR(block, 3);
447 rrec->rm_startblock = cpu_to_be32(XFS_IBT_BLOCK(mp));
448 rrec->rm_blockcount = cpu_to_be32(XFS_RMAP_BLOCK(mp) -
449 XFS_IBT_BLOCK(mp));
450 rrec->rm_owner = cpu_to_be64(XFS_RMAP_OWN_INOBT);
451 rrec->rm_offset = 0;
452 be16_add_cpu(&block->bb_numrecs, 1);
453
454 /* account for rmap btree root */
455 rrec = XFS_RMAP_REC_ADDR(block, 4);
456 rrec->rm_startblock = cpu_to_be32(XFS_RMAP_BLOCK(mp));
457 rrec->rm_blockcount = cpu_to_be32(1);
458 rrec->rm_owner = cpu_to_be64(XFS_RMAP_OWN_AG);
459 rrec->rm_offset = 0;
460 be16_add_cpu(&block->bb_numrecs, 1);
461
462 /* account for refc btree root */
463 if (xfs_sb_version_hasreflink(&mp->m_sb)) {
464 rrec = XFS_RMAP_REC_ADDR(block, 5);
465 rrec->rm_startblock = cpu_to_be32(
466 xfs_refc_block(mp));
467 rrec->rm_blockcount = cpu_to_be32(1);
468 rrec->rm_owner = cpu_to_be64(XFS_RMAP_OWN_REFC);
469 rrec->rm_offset = 0;
470 be16_add_cpu(&block->bb_numrecs, 1);
471 }
472
473 error = xfs_bwrite(bp);
474 xfs_buf_relse(bp);
475 if (error)
476 goto error0;
477 }
478
479 /*
480 * INO btree root block
481 */
482 bp = xfs_growfs_get_hdr_buf(mp,
483 XFS_AGB_TO_DADDR(mp, agno, XFS_IBT_BLOCK(mp)),
484 BTOBB(mp->m_sb.sb_blocksize), 0,
485 &xfs_inobt_buf_ops);
486 if (!bp) {
487 error = -ENOMEM;
488 goto error0;
489 }
490
491 if (xfs_sb_version_hascrc(&mp->m_sb))
492 xfs_btree_init_block(mp, bp, XFS_IBT_CRC_MAGIC, 0, 0,
493 agno, XFS_BTREE_CRC_BLOCKS);
494 else
495 xfs_btree_init_block(mp, bp, XFS_IBT_MAGIC, 0, 0,
496 agno, 0);
497
498 error = xfs_bwrite(bp);
499 xfs_buf_relse(bp);
500 if (error)
501 goto error0;
502
503 /*
504 * FINO btree root block
505 */
506 if (xfs_sb_version_hasfinobt(&mp->m_sb)) {
507 bp = xfs_growfs_get_hdr_buf(mp,
508 XFS_AGB_TO_DADDR(mp, agno, XFS_FIBT_BLOCK(mp)),
509 BTOBB(mp->m_sb.sb_blocksize), 0,
510 &xfs_inobt_buf_ops);
511 if (!bp) {
512 error = -ENOMEM;
513 goto error0;
514 }
515
516 if (xfs_sb_version_hascrc(&mp->m_sb))
517 xfs_btree_init_block(mp, bp, XFS_FIBT_CRC_MAGIC,
518 0, 0, agno,
519 XFS_BTREE_CRC_BLOCKS);
520 else
521 xfs_btree_init_block(mp, bp, XFS_FIBT_MAGIC, 0,
522 0, agno, 0);
523
524 error = xfs_bwrite(bp);
525 xfs_buf_relse(bp);
526 if (error)
527 goto error0;
528 }
529
530 /*
531 * refcount btree root block
532 */
533 if (xfs_sb_version_hasreflink(&mp->m_sb)) {
534 bp = xfs_growfs_get_hdr_buf(mp,
535 XFS_AGB_TO_DADDR(mp, agno, xfs_refc_block(mp)),
536 BTOBB(mp->m_sb.sb_blocksize), 0,
537 &xfs_refcountbt_buf_ops);
538 if (!bp) {
539 error = -ENOMEM;
540 goto error0;
541 }
542
543 xfs_btree_init_block(mp, bp, XFS_REFC_CRC_MAGIC,
544 0, 0, agno,
545 XFS_BTREE_CRC_BLOCKS);
546
547 error = xfs_bwrite(bp);
548 xfs_buf_relse(bp);
549 if (error)
550 goto error0;
551 }
552 }
553 xfs_trans_agblocks_delta(tp, nfree);
554 /*
555 * There are new blocks in the old last a.g.
556 */
557 if (new) {
558 struct xfs_owner_info oinfo;
559
560 /*
561 * Change the agi length.
562 */
563 error = xfs_ialloc_read_agi(mp, tp, agno, &bp);
564 if (error) {
565 goto error0;
566 }
567 ASSERT(bp);
568 agi = XFS_BUF_TO_AGI(bp);
569 be32_add_cpu(&agi->agi_length, new);
570 ASSERT(nagcount == oagcount ||
571 be32_to_cpu(agi->agi_length) == mp->m_sb.sb_agblocks);
572 xfs_ialloc_log_agi(tp, bp, XFS_AGI_LENGTH);
573 /*
574 * Change agf length.
575 */
576 error = xfs_alloc_read_agf(mp, tp, agno, 0, &bp);
577 if (error) {
578 goto error0;
579 }
580 ASSERT(bp);
581 agf = XFS_BUF_TO_AGF(bp);
582 be32_add_cpu(&agf->agf_length, new);
583 ASSERT(be32_to_cpu(agf->agf_length) ==
584 be32_to_cpu(agi->agi_length));
585
586 xfs_alloc_log_agf(tp, bp, XFS_AGF_LENGTH);
587
588 /*
589 * Free the new space.
590 *
591 * XFS_RMAP_OWN_NULL is used here to tell the rmap btree that
592 * this doesn't actually exist in the rmap btree.
593 */
594 xfs_rmap_ag_owner(&oinfo, XFS_RMAP_OWN_NULL);
595 error = xfs_free_extent(tp,
596 XFS_AGB_TO_FSB(mp, agno,
597 be32_to_cpu(agf->agf_length) - new),
598 new, &oinfo, XFS_AG_RESV_NONE);
599 if (error)
600 goto error0;
601 }
602
603 /*
604 * Update changed superblock fields transactionally. These are not
605 * seen by the rest of the world until the transaction commit applies
606 * them atomically to the superblock.
607 */
608 if (nagcount > oagcount)
609 xfs_trans_mod_sb(tp, XFS_TRANS_SB_AGCOUNT, nagcount - oagcount);
610 if (nb > mp->m_sb.sb_dblocks)
611 xfs_trans_mod_sb(tp, XFS_TRANS_SB_DBLOCKS,
612 nb - mp->m_sb.sb_dblocks);
613 if (nfree)
614 xfs_trans_mod_sb(tp, XFS_TRANS_SB_FDBLOCKS, nfree);
615 if (dpct)
616 xfs_trans_mod_sb(tp, XFS_TRANS_SB_IMAXPCT, dpct);
617 xfs_trans_set_sync(tp);
618 error = xfs_trans_commit(tp);
619 if (error)
620 return error;
621
622 /* New allocation groups fully initialized, so update mount struct */
623 if (nagimax)
624 mp->m_maxagi = nagimax;
625 if (mp->m_sb.sb_imax_pct) {
626 __uint64_t icount = mp->m_sb.sb_dblocks * mp->m_sb.sb_imax_pct;
627 do_div(icount, 100);
628 mp->m_maxicount = icount << mp->m_sb.sb_inopblog;
629 } else
630 mp->m_maxicount = 0;
631 xfs_set_low_space_thresholds(mp);
632 mp->m_alloc_set_aside = xfs_alloc_set_aside(mp);
633
634 /*
635 * If we expanded the last AG, free the per-AG reservation
636 * so we can reinitialize it with the new size.
637 */
638 if (new) {
639 struct xfs_perag *pag;
640
641 pag = xfs_perag_get(mp, agno);
642 error = xfs_ag_resv_free(pag);
643 xfs_perag_put(pag);
644 if (error)
645 goto out;
646 }
647
648 /* Reserve AG metadata blocks. */
649 error = xfs_fs_reserve_ag_blocks(mp);
650 if (error && error != -ENOSPC)
651 goto out;
652
653 /* update secondary superblocks. */
654 for (agno = 1; agno < nagcount; agno++) {
655 error = 0;
656 /*
657 * new secondary superblocks need to be zeroed, not read from
658 * disk as the contents of the new area we are growing into is
659 * completely unknown.
660 */
661 if (agno < oagcount) {
662 error = xfs_trans_read_buf(mp, NULL, mp->m_ddev_targp,
663 XFS_AGB_TO_DADDR(mp, agno, XFS_SB_BLOCK(mp)),
664 XFS_FSS_TO_BB(mp, 1), 0, &bp,
665 &xfs_sb_buf_ops);
666 } else {
667 bp = xfs_trans_get_buf(NULL, mp->m_ddev_targp,
668 XFS_AGB_TO_DADDR(mp, agno, XFS_SB_BLOCK(mp)),
669 XFS_FSS_TO_BB(mp, 1), 0);
670 if (bp) {
671 bp->b_ops = &xfs_sb_buf_ops;
672 xfs_buf_zero(bp, 0, BBTOB(bp->b_length));
673 } else
674 error = -ENOMEM;
675 }
676
677 /*
678 * If we get an error reading or writing alternate superblocks,
679 * continue. xfs_repair chooses the "best" superblock based
680 * on most matches; if we break early, we'll leave more
681 * superblocks un-updated than updated, and xfs_repair may
682 * pick them over the properly-updated primary.
683 */
684 if (error) {
685 xfs_warn(mp,
686 "error %d reading secondary superblock for ag %d",
687 error, agno);
688 saved_error = error;
689 continue;
690 }
691 xfs_sb_to_disk(XFS_BUF_TO_SBP(bp), &mp->m_sb);
692
693 error = xfs_bwrite(bp);
694 xfs_buf_relse(bp);
695 if (error) {
696 xfs_warn(mp,
697 "write error %d updating secondary superblock for ag %d",
698 error, agno);
699 saved_error = error;
700 continue;
701 }
702 }
703
704 out:
705 return saved_error ? saved_error : error;
706
707 error0:
708 xfs_trans_cancel(tp);
709 return error;
710}
711
712static int
713xfs_growfs_log_private(
714 xfs_mount_t *mp, /* mount point for filesystem */
715 xfs_growfs_log_t *in) /* growfs log input struct */
716{
717 xfs_extlen_t nb;
718
719 nb = in->newblocks;
720 if (nb < XFS_MIN_LOG_BLOCKS || nb < XFS_B_TO_FSB(mp, XFS_MIN_LOG_BYTES))
721 return -EINVAL;
722 if (nb == mp->m_sb.sb_logblocks &&
723 in->isint == (mp->m_sb.sb_logstart != 0))
724 return -EINVAL;
725 /*
726 * Moving the log is hard, need new interfaces to sync
727 * the log first, hold off all activity while moving it.
728 * Can have shorter or longer log in the same space,
729 * or transform internal to external log or vice versa.
730 */
731 return -ENOSYS;
732}
733
734/*
735 * protected versions of growfs function acquire and release locks on the mount
736 * point - exported through ioctls: XFS_IOC_FSGROWFSDATA, XFS_IOC_FSGROWFSLOG,
737 * XFS_IOC_FSGROWFSRT
738 */
739
740
741int
742xfs_growfs_data(
743 xfs_mount_t *mp,
744 xfs_growfs_data_t *in)
745{
746 int error;
747
748 if (!capable(CAP_SYS_ADMIN))
749 return -EPERM;
750 if (!mutex_trylock(&mp->m_growlock))
751 return -EWOULDBLOCK;
752 error = xfs_growfs_data_private(mp, in);
753 /*
754 * Increment the generation unconditionally, the error could be from
755 * updating the secondary superblocks, in which case the new size
756 * is live already.
757 */
758 mp->m_generation++;
759 mutex_unlock(&mp->m_growlock);
760 return error;
761}
762
763int
764xfs_growfs_log(
765 xfs_mount_t *mp,
766 xfs_growfs_log_t *in)
767{
768 int error;
769
770 if (!capable(CAP_SYS_ADMIN))
771 return -EPERM;
772 if (!mutex_trylock(&mp->m_growlock))
773 return -EWOULDBLOCK;
774 error = xfs_growfs_log_private(mp, in);
775 mutex_unlock(&mp->m_growlock);
776 return error;
777}
778
779/*
780 * exported through ioctl XFS_IOC_FSCOUNTS
781 */
782
783int
784xfs_fs_counts(
785 xfs_mount_t *mp,
786 xfs_fsop_counts_t *cnt)
787{
788 cnt->allocino = percpu_counter_read_positive(&mp->m_icount);
789 cnt->freeino = percpu_counter_read_positive(&mp->m_ifree);
790 cnt->freedata = percpu_counter_read_positive(&mp->m_fdblocks) -
791 mp->m_alloc_set_aside;
792
793 spin_lock(&mp->m_sb_lock);
794 cnt->freertx = mp->m_sb.sb_frextents;
795 spin_unlock(&mp->m_sb_lock);
796 return 0;
797}
798
799/*
800 * exported through ioctl XFS_IOC_SET_RESBLKS & XFS_IOC_GET_RESBLKS
801 *
802 * xfs_reserve_blocks is called to set m_resblks
803 * in the in-core mount table. The number of unused reserved blocks
804 * is kept in m_resblks_avail.
805 *
806 * Reserve the requested number of blocks if available. Otherwise return
807 * as many as possible to satisfy the request. The actual number
808 * reserved are returned in outval
809 *
810 * A null inval pointer indicates that only the current reserved blocks
811 * available should be returned no settings are changed.
812 */
813
814int
815xfs_reserve_blocks(
816 xfs_mount_t *mp,
817 __uint64_t *inval,
818 xfs_fsop_resblks_t *outval)
819{
820 __int64_t lcounter, delta;
821 __int64_t fdblks_delta = 0;
822 __uint64_t request;
823 __int64_t free;
824 int error = 0;
825
826 /* If inval is null, report current values and return */
827 if (inval == (__uint64_t *)NULL) {
828 if (!outval)
829 return -EINVAL;
830 outval->resblks = mp->m_resblks;
831 outval->resblks_avail = mp->m_resblks_avail;
832 return 0;
833 }
834
835 request = *inval;
836
837 /*
838 * With per-cpu counters, this becomes an interesting problem. we need
839 * to work out if we are freeing or allocation blocks first, then we can
840 * do the modification as necessary.
841 *
842 * We do this under the m_sb_lock so that if we are near ENOSPC, we will
843 * hold out any changes while we work out what to do. This means that
844 * the amount of free space can change while we do this, so we need to
845 * retry if we end up trying to reserve more space than is available.
846 */
847 spin_lock(&mp->m_sb_lock);
848
849 /*
850 * If our previous reservation was larger than the current value,
851 * then move any unused blocks back to the free pool. Modify the resblks
852 * counters directly since we shouldn't have any problems unreserving
853 * space.
854 */
855 if (mp->m_resblks > request) {
856 lcounter = mp->m_resblks_avail - request;
857 if (lcounter > 0) { /* release unused blocks */
858 fdblks_delta = lcounter;
859 mp->m_resblks_avail -= lcounter;
860 }
861 mp->m_resblks = request;
862 if (fdblks_delta) {
863 spin_unlock(&mp->m_sb_lock);
864 error = xfs_mod_fdblocks(mp, fdblks_delta, 0);
865 spin_lock(&mp->m_sb_lock);
866 }
867
868 goto out;
869 }
870
871 /*
872 * If the request is larger than the current reservation, reserve the
873 * blocks before we update the reserve counters. Sample m_fdblocks and
874 * perform a partial reservation if the request exceeds free space.
875 */
876 error = -ENOSPC;
877 do {
878 free = percpu_counter_sum(&mp->m_fdblocks) -
879 mp->m_alloc_set_aside;
880 if (!free)
881 break;
882
883 delta = request - mp->m_resblks;
884 lcounter = free - delta;
885 if (lcounter < 0)
886 /* We can't satisfy the request, just get what we can */
887 fdblks_delta = free;
888 else
889 fdblks_delta = delta;
890
891 /*
892 * We'll either succeed in getting space from the free block
893 * count or we'll get an ENOSPC. If we get a ENOSPC, it means
894 * things changed while we were calculating fdblks_delta and so
895 * we should try again to see if there is anything left to
896 * reserve.
897 *
898 * Don't set the reserved flag here - we don't want to reserve
899 * the extra reserve blocks from the reserve.....
900 */
901 spin_unlock(&mp->m_sb_lock);
902 error = xfs_mod_fdblocks(mp, -fdblks_delta, 0);
903 spin_lock(&mp->m_sb_lock);
904 } while (error == -ENOSPC);
905
906 /*
907 * Update the reserve counters if blocks have been successfully
908 * allocated.
909 */
910 if (!error && fdblks_delta) {
911 mp->m_resblks += fdblks_delta;
912 mp->m_resblks_avail += fdblks_delta;
913 }
914
915out:
916 if (outval) {
917 outval->resblks = mp->m_resblks;
918 outval->resblks_avail = mp->m_resblks_avail;
919 }
920
921 spin_unlock(&mp->m_sb_lock);
922 return error;
923}
924
925int
926xfs_fs_goingdown(
927 xfs_mount_t *mp,
928 __uint32_t inflags)
929{
930 switch (inflags) {
931 case XFS_FSOP_GOING_FLAGS_DEFAULT: {
932 struct super_block *sb = freeze_bdev(mp->m_super->s_bdev);
933
934 if (sb && !IS_ERR(sb)) {
935 xfs_force_shutdown(mp, SHUTDOWN_FORCE_UMOUNT);
936 thaw_bdev(sb->s_bdev, sb);
937 }
938
939 break;
940 }
941 case XFS_FSOP_GOING_FLAGS_LOGFLUSH:
942 xfs_force_shutdown(mp, SHUTDOWN_FORCE_UMOUNT);
943 break;
944 case XFS_FSOP_GOING_FLAGS_NOLOGFLUSH:
945 xfs_force_shutdown(mp,
946 SHUTDOWN_FORCE_UMOUNT | SHUTDOWN_LOG_IO_ERROR);
947 break;
948 default:
949 return -EINVAL;
950 }
951
952 return 0;
953}
954
955/*
956 * Force a shutdown of the filesystem instantly while keeping the filesystem
957 * consistent. We don't do an unmount here; just shutdown the shop, make sure
958 * that absolutely nothing persistent happens to this filesystem after this
959 * point.
960 */
961void
962xfs_do_force_shutdown(
963 xfs_mount_t *mp,
964 int flags,
965 char *fname,
966 int lnnum)
967{
968 int logerror;
969
970 logerror = flags & SHUTDOWN_LOG_IO_ERROR;
971
972 if (!(flags & SHUTDOWN_FORCE_UMOUNT)) {
973 xfs_notice(mp,
974 "%s(0x%x) called from line %d of file %s. Return address = 0x%p",
975 __func__, flags, lnnum, fname, __return_address);
976 }
977 /*
978 * No need to duplicate efforts.
979 */
980 if (XFS_FORCED_SHUTDOWN(mp) && !logerror)
981 return;
982
983 /*
984 * This flags XFS_MOUNT_FS_SHUTDOWN, makes sure that we don't
985 * queue up anybody new on the log reservations, and wakes up
986 * everybody who's sleeping on log reservations to tell them
987 * the bad news.
988 */
989 if (xfs_log_force_umount(mp, logerror))
990 return;
991
992 if (flags & SHUTDOWN_CORRUPT_INCORE) {
993 xfs_alert_tag(mp, XFS_PTAG_SHUTDOWN_CORRUPT,
994 "Corruption of in-memory data detected. Shutting down filesystem");
995 if (XFS_ERRLEVEL_HIGH <= xfs_error_level)
996 xfs_stack_trace();
997 } else if (!(flags & SHUTDOWN_FORCE_UMOUNT)) {
998 if (logerror) {
999 xfs_alert_tag(mp, XFS_PTAG_SHUTDOWN_LOGERROR,
1000 "Log I/O Error Detected. Shutting down filesystem");
1001 } else if (flags & SHUTDOWN_DEVICE_REQ) {
1002 xfs_alert_tag(mp, XFS_PTAG_SHUTDOWN_IOERROR,
1003 "All device paths lost. Shutting down filesystem");
1004 } else if (!(flags & SHUTDOWN_REMOTE_REQ)) {
1005 xfs_alert_tag(mp, XFS_PTAG_SHUTDOWN_IOERROR,
1006 "I/O Error Detected. Shutting down filesystem");
1007 }
1008 }
1009 if (!(flags & SHUTDOWN_FORCE_UMOUNT)) {
1010 xfs_alert(mp,
1011 "Please umount the filesystem and rectify the problem(s)");
1012 }
1013}
1014
1015/*
1016 * Reserve free space for per-AG metadata.
1017 */
1018int
1019xfs_fs_reserve_ag_blocks(
1020 struct xfs_mount *mp)
1021{
1022 xfs_agnumber_t agno;
1023 struct xfs_perag *pag;
1024 int error = 0;
1025 int err2;
1026
1027 for (agno = 0; agno < mp->m_sb.sb_agcount; agno++) {
1028 pag = xfs_perag_get(mp, agno);
1029 err2 = xfs_ag_resv_init(pag);
1030 xfs_perag_put(pag);
1031 if (err2 && !error)
1032 error = err2;
1033 }
1034
1035 if (error && error != -ENOSPC) {
1036 xfs_warn(mp,
1037 "Error %d reserving per-AG metadata reserve pool.", error);
1038 xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE);
1039 }
1040
1041 return error;
1042}
1043
1044/*
1045 * Free space reserved for per-AG metadata.
1046 */
1047int
1048xfs_fs_unreserve_ag_blocks(
1049 struct xfs_mount *mp)
1050{
1051 xfs_agnumber_t agno;
1052 struct xfs_perag *pag;
1053 int error = 0;
1054 int err2;
1055
1056 for (agno = 0; agno < mp->m_sb.sb_agcount; agno++) {
1057 pag = xfs_perag_get(mp, agno);
1058 err2 = xfs_ag_resv_free(pag);
1059 xfs_perag_put(pag);
1060 if (err2 && !error)
1061 error = err2;
1062 }
1063
1064 if (error)
1065 xfs_warn(mp,
1066 "Error %d freeing per-AG metadata reserve pool.", error);
1067
1068 return error;
1069}