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_shared.h"
21 #include "xfs_format.h"
22 #include "xfs_log_format.h"
23 #include "xfs_trans_resv.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"
44 #include "xfs_filestream.h"
46 #include "xfs_ag_resv.h"
49 * File system operations
59 memset(geo, 0, sizeof(*geo));
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;
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;
120 if (new_version >= 4) {
122 (xfs_sb_version_haslogv2(&mp->m_sb) ?
123 XFS_FSOP_GEOM_FLAGS_LOGV2 : 0);
124 geo->logsunit = mp->m_sb.sb_logsunit;
129 static struct xfs_buf *
130 xfs_growfs_get_hdr_buf(
131 struct xfs_mount *mp,
135 const struct xfs_buf_ops *ops)
139 bp = xfs_buf_get_uncached(mp->m_ddev_targp, numblks, flags);
143 xfs_buf_zero(bp, 0, BBTOB(bp->b_length));
145 bp->b_maps[0].bm_bn = blkno;
152 xfs_growfs_data_private(
153 xfs_mount_t *mp, /* mount point for filesystem */
154 xfs_growfs_data_t *in) /* growfs data input struct */
157 struct xfs_agfl *agfl;
161 xfs_extlen_t tmpsize;
162 xfs_alloc_rec_t *arec;
166 int error, saved_error = 0;
167 xfs_agnumber_t nagcount;
168 xfs_agnumber_t nagimax = 0;
169 xfs_rfsblock_t nb, nb_mod;
171 xfs_rfsblock_t nfree;
172 xfs_agnumber_t oagcount;
178 if (nb < mp->m_sb.sb_dblocks || pct < 0 || pct > 100)
180 if ((error = xfs_sb_validate_fsb_count(&mp->m_sb, nb)))
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);
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) {
195 nb = (xfs_rfsblock_t)nagcount * mp->m_sb.sb_agblocks;
196 if (nb < mp->m_sb.sb_dblocks)
199 new = nb - mp->m_sb.sb_dblocks;
200 oagcount = mp->m_sb.sb_agcount;
202 /* allocate the new per-ag structures */
203 if (nagcount > oagcount) {
204 error = xfs_initialize_perag(mp, nagcount, &nagimax);
209 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_growdata,
210 XFS_GROWFS_SPACE_RES(mp), 0, XFS_TRANS_RESERVE, &tp);
215 * Write new AG headers to disk. Non-transactional, but written
216 * synchronously so they are completed prior to the growfs transaction
220 for (agno = nagcount - 1; agno >= oagcount; agno--, new -= agsize) {
224 * AG freespace header block
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,
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)
242 (agno * (xfs_rfsblock_t)mp->m_sb.sb_agblocks);
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);
257 agf->agf_flfirst = cpu_to_be32(1);
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(
268 agf->agf_refcount_level = cpu_to_be32(1);
269 agf->agf_refcount_blocks = cpu_to_be32(1);
272 error = xfs_bwrite(bp);
278 * AG freelist header block
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,
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);
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);
300 error = xfs_bwrite(bp);
306 * AG inode header block
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,
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);
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);
334 for (bucket = 0; bucket < XFS_AGI_UNLINKED_BUCKETS; bucket++)
335 agi->agi_unlinked[bucket] = cpu_to_be32(NULLAGINO);
337 error = xfs_bwrite(bp);
343 * BNO btree root block
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);
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);
359 xfs_btree_init_block(mp, bp, XFS_ABTB_MAGIC, 0, 1,
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));
367 error = xfs_bwrite(bp);
373 * CNT btree root block
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);
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);
388 xfs_btree_init_block(mp, bp, XFS_ABTC_MAGIC, 0, 1,
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);
397 error = xfs_bwrite(bp);
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;
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);
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);
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
427 * Note: unlike mkfs, we never have to account for log
428 * space when growing the data regions
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);
435 be16_add_cpu(&block->bb_numrecs, 1);
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);
443 be16_add_cpu(&block->bb_numrecs, 1);
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) -
450 rrec->rm_owner = cpu_to_be64(XFS_RMAP_OWN_INOBT);
452 be16_add_cpu(&block->bb_numrecs, 1);
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);
460 be16_add_cpu(&block->bb_numrecs, 1);
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(
467 rrec->rm_blockcount = cpu_to_be32(1);
468 rrec->rm_owner = cpu_to_be64(XFS_RMAP_OWN_REFC);
470 be16_add_cpu(&block->bb_numrecs, 1);
473 error = xfs_bwrite(bp);
480 * INO btree root block
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,
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);
495 xfs_btree_init_block(mp, bp, XFS_IBT_MAGIC, 0, 0,
498 error = xfs_bwrite(bp);
504 * FINO btree root block
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,
516 if (xfs_sb_version_hascrc(&mp->m_sb))
517 xfs_btree_init_block(mp, bp, XFS_FIBT_CRC_MAGIC,
519 XFS_BTREE_CRC_BLOCKS);
521 xfs_btree_init_block(mp, bp, XFS_FIBT_MAGIC, 0,
524 error = xfs_bwrite(bp);
531 * refcount btree root block
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);
543 xfs_btree_init_block(mp, bp, XFS_REFC_CRC_MAGIC,
545 XFS_BTREE_CRC_BLOCKS);
547 error = xfs_bwrite(bp);
553 xfs_trans_agblocks_delta(tp, nfree);
555 * There are new blocks in the old last a.g.
558 struct xfs_owner_info oinfo;
561 * Change the agi length.
563 error = xfs_ialloc_read_agi(mp, tp, agno, &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);
576 error = xfs_alloc_read_agf(mp, tp, agno, 0, &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));
586 xfs_alloc_log_agf(tp, bp, XFS_AGF_LENGTH);
589 * Free the new space.
591 * XFS_RMAP_OWN_NULL is used here to tell the rmap btree that
592 * this doesn't actually exist in the rmap btree.
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);
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.
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);
614 xfs_trans_mod_sb(tp, XFS_TRANS_SB_FDBLOCKS, nfree);
616 xfs_trans_mod_sb(tp, XFS_TRANS_SB_IMAXPCT, dpct);
617 xfs_trans_set_sync(tp);
618 error = xfs_trans_commit(tp);
622 /* New allocation groups fully initialized, so update mount struct */
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;
628 mp->m_maxicount = icount << mp->m_sb.sb_inopblog;
631 xfs_set_low_space_thresholds(mp);
632 mp->m_alloc_set_aside = xfs_alloc_set_aside(mp);
634 /* Reserve AG metadata blocks. */
635 error = xfs_fs_reserve_ag_blocks(mp);
636 if (error && error != -ENOSPC)
639 /* update secondary superblocks. */
640 for (agno = 1; agno < nagcount; agno++) {
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.
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,
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);
657 bp->b_ops = &xfs_sb_buf_ops;
658 xfs_buf_zero(bp, 0, BBTOB(bp->b_length));
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.
672 "error %d reading secondary superblock for ag %d",
677 xfs_sb_to_disk(XFS_BUF_TO_SBP(bp), &mp->m_sb);
679 error = xfs_bwrite(bp);
683 "write error %d updating secondary superblock for ag %d",
691 return saved_error ? saved_error : error;
694 xfs_trans_cancel(tp);
699 xfs_growfs_log_private(
700 xfs_mount_t *mp, /* mount point for filesystem */
701 xfs_growfs_log_t *in) /* growfs log input struct */
706 if (nb < XFS_MIN_LOG_BLOCKS || nb < XFS_B_TO_FSB(mp, XFS_MIN_LOG_BYTES))
708 if (nb == mp->m_sb.sb_logblocks &&
709 in->isint == (mp->m_sb.sb_logstart != 0))
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.
721 * protected versions of growfs function acquire and release locks on the mount
722 * point - exported through ioctls: XFS_IOC_FSGROWFSDATA, XFS_IOC_FSGROWFSLOG,
730 xfs_growfs_data_t *in)
734 if (!capable(CAP_SYS_ADMIN))
736 if (!mutex_trylock(&mp->m_growlock))
738 error = xfs_growfs_data_private(mp, in);
740 * Increment the generation unconditionally, the error could be from
741 * updating the secondary superblocks, in which case the new size
745 mutex_unlock(&mp->m_growlock);
752 xfs_growfs_log_t *in)
756 if (!capable(CAP_SYS_ADMIN))
758 if (!mutex_trylock(&mp->m_growlock))
760 error = xfs_growfs_log_private(mp, in);
761 mutex_unlock(&mp->m_growlock);
766 * exported through ioctl XFS_IOC_FSCOUNTS
772 xfs_fsop_counts_t *cnt)
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;
779 spin_lock(&mp->m_sb_lock);
780 cnt->freertx = mp->m_sb.sb_frextents;
781 spin_unlock(&mp->m_sb_lock);
786 * exported through ioctl XFS_IOC_SET_RESBLKS & XFS_IOC_GET_RESBLKS
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.
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
796 * A null inval pointer indicates that only the current reserved blocks
797 * available should be returned no settings are changed.
804 xfs_fsop_resblks_t *outval)
806 __int64_t lcounter, delta;
807 __int64_t fdblks_delta = 0;
812 /* If inval is null, report current values and return */
813 if (inval == (__uint64_t *)NULL) {
816 outval->resblks = mp->m_resblks;
817 outval->resblks_avail = mp->m_resblks_avail;
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.
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.
833 spin_lock(&mp->m_sb_lock);
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
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;
847 mp->m_resblks = request;
849 spin_unlock(&mp->m_sb_lock);
850 error = xfs_mod_fdblocks(mp, fdblks_delta, 0);
851 spin_lock(&mp->m_sb_lock);
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.
864 free = percpu_counter_sum(&mp->m_fdblocks) -
865 mp->m_alloc_set_aside;
869 delta = request - mp->m_resblks;
870 lcounter = free - delta;
872 /* We can't satisfy the request, just get what we can */
875 fdblks_delta = delta;
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
884 * Don't set the reserved flag here - we don't want to reserve
885 * the extra reserve blocks from the reserve.....
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);
893 * Update the reserve counters if blocks have been successfully
896 if (!error && fdblks_delta) {
897 mp->m_resblks += fdblks_delta;
898 mp->m_resblks_avail += fdblks_delta;
903 outval->resblks = mp->m_resblks;
904 outval->resblks_avail = mp->m_resblks_avail;
907 spin_unlock(&mp->m_sb_lock);
917 case XFS_FSOP_GOING_FLAGS_DEFAULT: {
918 struct super_block *sb = freeze_bdev(mp->m_super->s_bdev);
920 if (sb && !IS_ERR(sb)) {
921 xfs_force_shutdown(mp, SHUTDOWN_FORCE_UMOUNT);
922 thaw_bdev(sb->s_bdev, sb);
927 case XFS_FSOP_GOING_FLAGS_LOGFLUSH:
928 xfs_force_shutdown(mp, SHUTDOWN_FORCE_UMOUNT);
930 case XFS_FSOP_GOING_FLAGS_NOLOGFLUSH:
931 xfs_force_shutdown(mp,
932 SHUTDOWN_FORCE_UMOUNT | SHUTDOWN_LOG_IO_ERROR);
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
948 xfs_do_force_shutdown(
956 logerror = flags & SHUTDOWN_LOG_IO_ERROR;
958 if (!(flags & SHUTDOWN_FORCE_UMOUNT)) {
960 "%s(0x%x) called from line %d of file %s. Return address = 0x%p",
961 __func__, flags, lnnum, fname, __return_address);
964 * No need to duplicate efforts.
966 if (XFS_FORCED_SHUTDOWN(mp) && !logerror)
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
975 if (xfs_log_force_umount(mp, logerror))
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)
983 } else if (!(flags & SHUTDOWN_FORCE_UMOUNT)) {
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");
995 if (!(flags & SHUTDOWN_FORCE_UMOUNT)) {
997 "Please umount the filesystem and rectify the problem(s)");
1002 * Reserve free space for per-AG metadata.
1005 xfs_fs_reserve_ag_blocks(
1006 struct xfs_mount *mp)
1008 xfs_agnumber_t agno;
1009 struct xfs_perag *pag;
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);
1021 if (error && error != -ENOSPC) {
1023 "Error %d reserving per-AG metadata reserve pool.", error);
1024 xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE);
1031 * Free space reserved for per-AG metadata.
1034 xfs_fs_unreserve_ag_blocks(
1035 struct xfs_mount *mp)
1037 xfs_agnumber_t agno;
1038 struct xfs_perag *pag;
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);
1052 "Error %d freeing per-AG metadata reserve pool.", error);