?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
[media] atmel-isc: fix error return code in atmel_isc_probe()
[linux-stable.git] / fs / xfs / xfs_fsops.c
blob93d12fa2670d53bf8b6bf23c51325d48467b8ab2
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
52 int
53 xfs_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
129 static struct xfs_buf *
130 xfs_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
151 static int
152 xfs_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 /* Reserve AG metadata blocks. */
635 error = xfs_fs_reserve_ag_blocks(mp);
636 if (error && error != -ENOSPC)
637 goto out;
638
639 /* update secondary superblocks. */
640 for (agno = 1; agno < nagcount; agno++) {
641 error = 0;
642 /*
643 * new secondary superblocks need to be zeroed, not read from
644 * disk as the contents of the new area we are growing into is
645 * completely unknown.
646 */
647 if (agno < oagcount) {
648 error = xfs_trans_read_buf(mp, NULL, mp->m_ddev_targp,
649 XFS_AGB_TO_DADDR(mp, agno, XFS_SB_BLOCK(mp)),
650 XFS_FSS_TO_BB(mp, 1), 0, &bp,
651 &xfs_sb_buf_ops);
652 } else {
653 bp = xfs_trans_get_buf(NULL, mp->m_ddev_targp,
654 XFS_AGB_TO_DADDR(mp, agno, XFS_SB_BLOCK(mp)),
655 XFS_FSS_TO_BB(mp, 1), 0);
656 if (bp) {
657 bp->b_ops = &xfs_sb_buf_ops;
658 xfs_buf_zero(bp, 0, BBTOB(bp->b_length));
659 } else
660 error = -ENOMEM;
661 }
662
663 /*
664 * If we get an error reading or writing alternate superblocks,
665 * continue. xfs_repair chooses the "best" superblock based
666 * on most matches; if we break early, we'll leave more
667 * superblocks un-updated than updated, and xfs_repair may
668 * pick them over the properly-updated primary.
669 */
670 if (error) {
671 xfs_warn(mp,
672 "error %d reading secondary superblock for ag %d",
673 error, agno);
674 saved_error = error;
675 continue;
676 }
677 xfs_sb_to_disk(XFS_BUF_TO_SBP(bp), &mp->m_sb);
678
679 error = xfs_bwrite(bp);
680 xfs_buf_relse(bp);
681 if (error) {
682 xfs_warn(mp,
683 "write error %d updating secondary superblock for ag %d",
684 error, agno);
685 saved_error = error;
686 continue;
687 }
688 }
689
690 out:
691 return saved_error ? saved_error : error;
692
693 error0:
694 xfs_trans_cancel(tp);
695 return error;
696 }
697
698 static int
699 xfs_growfs_log_private(
700 xfs_mount_t *mp, /* mount point for filesystem */
701 xfs_growfs_log_t *in) /* growfs log input struct */
702 {
703 xfs_extlen_t nb;
704
705 nb = in->newblocks;
706 if (nb < XFS_MIN_LOG_BLOCKS || nb < XFS_B_TO_FSB(mp, XFS_MIN_LOG_BYTES))
707 return -EINVAL;
708 if (nb == mp->m_sb.sb_logblocks &&
709 in->isint == (mp->m_sb.sb_logstart != 0))
710 return -EINVAL;
711 /*
712 * Moving the log is hard, need new interfaces to sync
713 * the log first, hold off all activity while moving it.
714 * Can have shorter or longer log in the same space,
715 * or transform internal to external log or vice versa.
716 */
717 return -ENOSYS;
718 }
719
720 /*
721 * protected versions of growfs function acquire and release locks on the mount
722 * point - exported through ioctls: XFS_IOC_FSGROWFSDATA, XFS_IOC_FSGROWFSLOG,
723 * XFS_IOC_FSGROWFSRT
724 */
725
726
727 int
728 xfs_growfs_data(
729 xfs_mount_t *mp,
730 xfs_growfs_data_t *in)
731 {
732 int error;
733
734 if (!capable(CAP_SYS_ADMIN))
735 return -EPERM;
736 if (!mutex_trylock(&mp->m_growlock))
737 return -EWOULDBLOCK;
738 error = xfs_growfs_data_private(mp, in);
739 /*
740 * Increment the generation unconditionally, the error could be from
741 * updating the secondary superblocks, in which case the new size
742 * is live already.
743 */
744 mp->m_generation++;
745 mutex_unlock(&mp->m_growlock);
746 return error;
747 }
748
749 int
750 xfs_growfs_log(
751 xfs_mount_t *mp,
752 xfs_growfs_log_t *in)
753 {
754 int error;
755
756 if (!capable(CAP_SYS_ADMIN))
757 return -EPERM;
758 if (!mutex_trylock(&mp->m_growlock))
759 return -EWOULDBLOCK;
760 error = xfs_growfs_log_private(mp, in);
761 mutex_unlock(&mp->m_growlock);
762 return error;
763 }
764
765 /*
766 * exported through ioctl XFS_IOC_FSCOUNTS
767 */
768
769 int
770 xfs_fs_counts(
771 xfs_mount_t *mp,
772 xfs_fsop_counts_t *cnt)
773 {
774 cnt->allocino = percpu_counter_read_positive(&mp->m_icount);
775 cnt->freeino = percpu_counter_read_positive(&mp->m_ifree);
776 cnt->freedata = percpu_counter_read_positive(&mp->m_fdblocks) -
777 mp->m_alloc_set_aside;
778
779 spin_lock(&mp->m_sb_lock);
780 cnt->freertx = mp->m_sb.sb_frextents;
781 spin_unlock(&mp->m_sb_lock);
782 return 0;
783 }
784
785 /*
786 * exported through ioctl XFS_IOC_SET_RESBLKS & XFS_IOC_GET_RESBLKS
787 *
788 * xfs_reserve_blocks is called to set m_resblks
789 * in the in-core mount table. The number of unused reserved blocks
790 * is kept in m_resblks_avail.
791 *
792 * Reserve the requested number of blocks if available. Otherwise return
793 * as many as possible to satisfy the request. The actual number
794 * reserved are returned in outval
795 *
796 * A null inval pointer indicates that only the current reserved blocks
797 * available should be returned no settings are changed.
798 */
799
800 int
801 xfs_reserve_blocks(
802 xfs_mount_t *mp,
803 __uint64_t *inval,
804 xfs_fsop_resblks_t *outval)
805 {
806 __int64_t lcounter, delta;
807 __int64_t fdblks_delta = 0;
808 __uint64_t request;
809 __int64_t free;
810 int error = 0;
811
812 /* If inval is null, report current values and return */
813 if (inval == (__uint64_t *)NULL) {
814 if (!outval)
815 return -EINVAL;
816 outval->resblks = mp->m_resblks;
817 outval->resblks_avail = mp->m_resblks_avail;
818 return 0;
819 }
820
821 request = *inval;
822
823 /*
824 * With per-cpu counters, this becomes an interesting problem. we need
825 * to work out if we are freeing or allocation blocks first, then we can
826 * do the modification as necessary.
827 *
828 * We do this under the m_sb_lock so that if we are near ENOSPC, we will
829 * hold out any changes while we work out what to do. This means that
830 * the amount of free space can change while we do this, so we need to
831 * retry if we end up trying to reserve more space than is available.
832 */
833 spin_lock(&mp->m_sb_lock);
834
835 /*
836 * If our previous reservation was larger than the current value,
837 * then move any unused blocks back to the free pool. Modify the resblks
838 * counters directly since we shouldn't have any problems unreserving
839 * space.
840 */
841 if (mp->m_resblks > request) {
842 lcounter = mp->m_resblks_avail - request;
843 if (lcounter > 0) { /* release unused blocks */
844 fdblks_delta = lcounter;
845 mp->m_resblks_avail -= lcounter;
846 }
847 mp->m_resblks = request;
848 if (fdblks_delta) {
849 spin_unlock(&mp->m_sb_lock);
850 error = xfs_mod_fdblocks(mp, fdblks_delta, 0);
851 spin_lock(&mp->m_sb_lock);
852 }
853
854 goto out;
855 }
856
857 /*
858 * If the request is larger than the current reservation, reserve the
859 * blocks before we update the reserve counters. Sample m_fdblocks and
860 * perform a partial reservation if the request exceeds free space.
861 */
862 error = -ENOSPC;
863 do {
864 free = percpu_counter_sum(&mp->m_fdblocks) -
865 mp->m_alloc_set_aside;
866 if (!free)
867 break;
868
869 delta = request - mp->m_resblks;
870 lcounter = free - delta;
871 if (lcounter < 0)
872 /* We can't satisfy the request, just get what we can */
873 fdblks_delta = free;
874 else
875 fdblks_delta = delta;
876
877 /*
878 * We'll either succeed in getting space from the free block
879 * count or we'll get an ENOSPC. If we get a ENOSPC, it means
880 * things changed while we were calculating fdblks_delta and so
881 * we should try again to see if there is anything left to
882 * reserve.
883 *
884 * Don't set the reserved flag here - we don't want to reserve
885 * the extra reserve blocks from the reserve.....
886 */
887 spin_unlock(&mp->m_sb_lock);
888 error = xfs_mod_fdblocks(mp, -fdblks_delta, 0);
889 spin_lock(&mp->m_sb_lock);
890 } while (error == -ENOSPC);
891
892 /*
893 * Update the reserve counters if blocks have been successfully
894 * allocated.
895 */
896 if (!error && fdblks_delta) {
897 mp->m_resblks += fdblks_delta;
898 mp->m_resblks_avail += fdblks_delta;
899 }
900
901 out:
902 if (outval) {
903 outval->resblks = mp->m_resblks;
904 outval->resblks_avail = mp->m_resblks_avail;
905 }
906
907 spin_unlock(&mp->m_sb_lock);
908 return error;
909 }
910
911 int
912 xfs_fs_goingdown(
913 xfs_mount_t *mp,
914 __uint32_t inflags)
915 {
916 switch (inflags) {
917 case XFS_FSOP_GOING_FLAGS_DEFAULT: {
918 struct super_block *sb = freeze_bdev(mp->m_super->s_bdev);
919
920 if (sb && !IS_ERR(sb)) {
921 xfs_force_shutdown(mp, SHUTDOWN_FORCE_UMOUNT);
922 thaw_bdev(sb->s_bdev, sb);
923 }
924
925 break;
926 }
927 case XFS_FSOP_GOING_FLAGS_LOGFLUSH:
928 xfs_force_shutdown(mp, SHUTDOWN_FORCE_UMOUNT);
929 break;
930 case XFS_FSOP_GOING_FLAGS_NOLOGFLUSH:
931 xfs_force_shutdown(mp,
932 SHUTDOWN_FORCE_UMOUNT | SHUTDOWN_LOG_IO_ERROR);
933 break;
934 default:
935 return -EINVAL;
936 }
937
938 return 0;
939 }
940
941 /*
942 * Force a shutdown of the filesystem instantly while keeping the filesystem
943 * consistent. We don't do an unmount here; just shutdown the shop, make sure
944 * that absolutely nothing persistent happens to this filesystem after this
945 * point.
946 */
947 void
948 xfs_do_force_shutdown(
949 xfs_mount_t *mp,
950 int flags,
951 char *fname,
952 int lnnum)
953 {
954 int logerror;
955
956 logerror = flags & SHUTDOWN_LOG_IO_ERROR;
957
958 if (!(flags & SHUTDOWN_FORCE_UMOUNT)) {
959 xfs_notice(mp,
960 "%s(0x%x) called from line %d of file %s. Return address = 0x%p",
961 __func__, flags, lnnum, fname, __return_address);
962 }
963 /*
964 * No need to duplicate efforts.
965 */
966 if (XFS_FORCED_SHUTDOWN(mp) && !logerror)
967 return;
968
969 /*
970 * This flags XFS_MOUNT_FS_SHUTDOWN, makes sure that we don't
971 * queue up anybody new on the log reservations, and wakes up
972 * everybody who's sleeping on log reservations to tell them
973 * the bad news.
974 */
975 if (xfs_log_force_umount(mp, logerror))
976 return;
977
978 if (flags & SHUTDOWN_CORRUPT_INCORE) {
979 xfs_alert_tag(mp, XFS_PTAG_SHUTDOWN_CORRUPT,
980 "Corruption of in-memory data detected. Shutting down filesystem");
981 if (XFS_ERRLEVEL_HIGH <= xfs_error_level)
982 xfs_stack_trace();
983 } else if (!(flags & SHUTDOWN_FORCE_UMOUNT)) {
984 if (logerror) {
985 xfs_alert_tag(mp, XFS_PTAG_SHUTDOWN_LOGERROR,
986 "Log I/O Error Detected. Shutting down filesystem");
987 } else if (flags & SHUTDOWN_DEVICE_REQ) {
988 xfs_alert_tag(mp, XFS_PTAG_SHUTDOWN_IOERROR,
989 "All device paths lost. Shutting down filesystem");
990 } else if (!(flags & SHUTDOWN_REMOTE_REQ)) {
991 xfs_alert_tag(mp, XFS_PTAG_SHUTDOWN_IOERROR,
992 "I/O Error Detected. Shutting down filesystem");
993 }
994 }
995 if (!(flags & SHUTDOWN_FORCE_UMOUNT)) {
996 xfs_alert(mp,
997 "Please umount the filesystem and rectify the problem(s)");
998 }
999 }
1000
1001 /*
1002 * Reserve free space for per-AG metadata.
1003 */
1004 int
1005 xfs_fs_reserve_ag_blocks(
1006 struct xfs_mount *mp)
1007 {
1008 xfs_agnumber_t agno;
1009 struct xfs_perag *pag;
1010 int error = 0;
1011 int err2;
1012
1013 for (agno = 0; agno < mp->m_sb.sb_agcount; agno++) {
1014 pag = xfs_perag_get(mp, agno);
1015 err2 = xfs_ag_resv_init(pag);
1016 xfs_perag_put(pag);
1017 if (err2 && !error)
1018 error = err2;
1019 }
1020
1021 if (error && error != -ENOSPC) {
1022 xfs_warn(mp,
1023 "Error %d reserving per-AG metadata reserve pool.", error);
1024 xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE);
1025 }
1026
1027 return error;
1028 }
1029
1030 /*
1031 * Free space reserved for per-AG metadata.
1032 */
1033 int
1034 xfs_fs_unreserve_ag_blocks(
1035 struct xfs_mount *mp)
1036 {
1037 xfs_agnumber_t agno;
1038 struct xfs_perag *pag;
1039 int error = 0;
1040 int err2;
1041
1042 for (agno = 0; agno < mp->m_sb.sb_agcount; agno++) {
1043 pag = xfs_perag_get(mp, agno);
1044 err2 = xfs_ag_resv_free(pag);
1045 xfs_perag_put(pag);
1046 if (err2 && !error)
1047 error = err2;
1048 }
1049
1050 if (error)
1051 xfs_warn(mp,
1052 "Error %d freeing per-AG metadata reserve pool.", error);
1053
1054 return error;
1055 }
Linux kernel stable tree