1 // SPDX-License-Identifier: GPL-2.0
3 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
8 #include "xfs_shared.h"
9 #include "xfs_format.h"
10 #include "xfs_log_format.h"
11 #include "xfs_trans_resv.h"
14 #include "xfs_mount.h"
15 #include "xfs_ialloc.h"
16 #include "xfs_alloc.h"
17 #include "xfs_error.h"
18 #include "xfs_trans.h"
19 #include "xfs_buf_item.h"
20 #include "xfs_bmap_btree.h"
21 #include "xfs_alloc_btree.h"
23 #include "xfs_rmap_btree.h"
24 #include "xfs_refcount_btree.h"
25 #include "xfs_da_format.h"
26 #include "xfs_health.h"
28 #include "xfs_rtbitmap.h"
31 * Physical superblock buffer manipulations. Shared with libxfs in userspace.
35 * Check that all the V4 feature bits that the V5 filesystem format requires are
39 xfs_sb_validate_v5_features(
42 /* We must not have any unknown V4 feature bits set */
43 if (sbp->sb_versionnum & ~XFS_SB_VERSION_OKBITS)
47 * The CRC bit is considered an invalid V4 flag, so we have to add it
48 * manually to the OKBITS mask.
50 if (sbp->sb_features2 & ~(XFS_SB_VERSION2_OKBITS |
51 XFS_SB_VERSION2_CRCBIT))
54 /* Now check all the required V4 feature flags are set. */
56 #define V5_VERS_FLAGS (XFS_SB_VERSION_NLINKBIT | \
57 XFS_SB_VERSION_ALIGNBIT | \
58 XFS_SB_VERSION_LOGV2BIT | \
59 XFS_SB_VERSION_EXTFLGBIT | \
60 XFS_SB_VERSION_DIRV2BIT | \
61 XFS_SB_VERSION_MOREBITSBIT)
63 #define V5_FEAT_FLAGS (XFS_SB_VERSION2_LAZYSBCOUNTBIT | \
64 XFS_SB_VERSION2_ATTR2BIT | \
65 XFS_SB_VERSION2_PROJID32BIT | \
66 XFS_SB_VERSION2_CRCBIT)
68 if ((sbp->sb_versionnum & V5_VERS_FLAGS) != V5_VERS_FLAGS)
70 if ((sbp->sb_features2 & V5_FEAT_FLAGS) != V5_FEAT_FLAGS)
76 * We current support XFS v5 formats with known features and v4 superblocks with
77 * at least V2 directories.
84 * All v5 filesystems are supported, but we must check that all the
85 * required v4 feature flags are enabled correctly as the code checks
86 * those flags and not for v5 support.
88 if (xfs_sb_is_v5(sbp))
89 return xfs_sb_validate_v5_features(sbp);
91 /* versions prior to v4 are not supported */
92 if (XFS_SB_VERSION_NUM(sbp) != XFS_SB_VERSION_4)
95 /* We must not have any unknown v4 feature bits set */
96 if ((sbp->sb_versionnum & ~XFS_SB_VERSION_OKBITS) ||
97 ((sbp->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT) &&
98 (sbp->sb_features2 & ~XFS_SB_VERSION2_OKBITS)))
101 /* V4 filesystems need v2 directories and unwritten extents */
102 if (!(sbp->sb_versionnum & XFS_SB_VERSION_DIRV2BIT))
104 if (!(sbp->sb_versionnum & XFS_SB_VERSION_EXTFLGBIT))
107 /* It's a supported v4 filesystem */
112 xfs_sb_version_to_features(
115 uint64_t features = 0;
117 /* optional V4 features */
118 if (sbp->sb_rblocks > 0)
119 features |= XFS_FEAT_REALTIME;
120 if (sbp->sb_versionnum & XFS_SB_VERSION_NLINKBIT)
121 features |= XFS_FEAT_NLINK;
122 if (sbp->sb_versionnum & XFS_SB_VERSION_ATTRBIT)
123 features |= XFS_FEAT_ATTR;
124 if (sbp->sb_versionnum & XFS_SB_VERSION_QUOTABIT)
125 features |= XFS_FEAT_QUOTA;
126 if (sbp->sb_versionnum & XFS_SB_VERSION_ALIGNBIT)
127 features |= XFS_FEAT_ALIGN;
128 if (sbp->sb_versionnum & XFS_SB_VERSION_LOGV2BIT)
129 features |= XFS_FEAT_LOGV2;
130 if (sbp->sb_versionnum & XFS_SB_VERSION_DALIGNBIT)
131 features |= XFS_FEAT_DALIGN;
132 if (sbp->sb_versionnum & XFS_SB_VERSION_EXTFLGBIT)
133 features |= XFS_FEAT_EXTFLG;
134 if (sbp->sb_versionnum & XFS_SB_VERSION_SECTORBIT)
135 features |= XFS_FEAT_SECTOR;
136 if (sbp->sb_versionnum & XFS_SB_VERSION_BORGBIT)
137 features |= XFS_FEAT_ASCIICI;
138 if (sbp->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT) {
139 if (sbp->sb_features2 & XFS_SB_VERSION2_LAZYSBCOUNTBIT)
140 features |= XFS_FEAT_LAZYSBCOUNT;
141 if (sbp->sb_features2 & XFS_SB_VERSION2_ATTR2BIT)
142 features |= XFS_FEAT_ATTR2;
143 if (sbp->sb_features2 & XFS_SB_VERSION2_PROJID32BIT)
144 features |= XFS_FEAT_PROJID32;
145 if (sbp->sb_features2 & XFS_SB_VERSION2_FTYPE)
146 features |= XFS_FEAT_FTYPE;
149 if (!xfs_sb_is_v5(sbp))
152 /* Always on V5 features */
153 features |= XFS_FEAT_ALIGN | XFS_FEAT_LOGV2 | XFS_FEAT_EXTFLG |
154 XFS_FEAT_LAZYSBCOUNT | XFS_FEAT_ATTR2 | XFS_FEAT_PROJID32 |
155 XFS_FEAT_V3INODES | XFS_FEAT_CRC | XFS_FEAT_PQUOTINO;
157 /* Optional V5 features */
158 if (sbp->sb_features_ro_compat & XFS_SB_FEAT_RO_COMPAT_FINOBT)
159 features |= XFS_FEAT_FINOBT;
160 if (sbp->sb_features_ro_compat & XFS_SB_FEAT_RO_COMPAT_RMAPBT)
161 features |= XFS_FEAT_RMAPBT;
162 if (sbp->sb_features_ro_compat & XFS_SB_FEAT_RO_COMPAT_REFLINK)
163 features |= XFS_FEAT_REFLINK;
164 if (sbp->sb_features_ro_compat & XFS_SB_FEAT_RO_COMPAT_INOBTCNT)
165 features |= XFS_FEAT_INOBTCNT;
166 if (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_FTYPE)
167 features |= XFS_FEAT_FTYPE;
168 if (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_SPINODES)
169 features |= XFS_FEAT_SPINODES;
170 if (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_META_UUID)
171 features |= XFS_FEAT_META_UUID;
172 if (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_BIGTIME)
173 features |= XFS_FEAT_BIGTIME;
174 if (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_NEEDSREPAIR)
175 features |= XFS_FEAT_NEEDSREPAIR;
176 if (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_NREXT64)
177 features |= XFS_FEAT_NREXT64;
182 /* Check all the superblock fields we care about when reading one in. */
184 xfs_validate_sb_read(
185 struct xfs_mount *mp,
188 if (!xfs_sb_is_v5(sbp))
192 * Version 5 superblock feature mask validation. Reject combinations
193 * the kernel cannot support up front before checking anything else.
195 if (xfs_sb_has_compat_feature(sbp, XFS_SB_FEAT_COMPAT_UNKNOWN)) {
197 "Superblock has unknown compatible features (0x%x) enabled.",
198 (sbp->sb_features_compat & XFS_SB_FEAT_COMPAT_UNKNOWN));
200 "Using a more recent kernel is recommended.");
203 if (xfs_sb_has_ro_compat_feature(sbp, XFS_SB_FEAT_RO_COMPAT_UNKNOWN)) {
205 "Superblock has unknown read-only compatible features (0x%x) enabled.",
206 (sbp->sb_features_ro_compat &
207 XFS_SB_FEAT_RO_COMPAT_UNKNOWN));
208 if (!xfs_is_readonly(mp)) {
210 "Attempted to mount read-only compatible filesystem read-write.");
212 "Filesystem can only be safely mounted read only.");
217 if (xfs_sb_has_incompat_feature(sbp, XFS_SB_FEAT_INCOMPAT_UNKNOWN)) {
219 "Superblock has unknown incompatible features (0x%x) enabled.",
220 (sbp->sb_features_incompat &
221 XFS_SB_FEAT_INCOMPAT_UNKNOWN));
223 "Filesystem cannot be safely mounted by this kernel.");
230 /* Check all the superblock fields we care about when writing one out. */
232 xfs_validate_sb_write(
233 struct xfs_mount *mp,
238 * Carry out additional sb summary counter sanity checks when we write
239 * the superblock. We skip this in the read validator because there
240 * could be newer superblocks in the log and if the values are garbage
241 * even after replay we'll recalculate them at the end of log mount.
243 * mkfs has traditionally written zeroed counters to inprogress and
244 * secondary superblocks, so allow this usage to continue because
245 * we never read counters from such superblocks.
247 if (xfs_buf_daddr(bp) == XFS_SB_DADDR && !sbp->sb_inprogress &&
248 (sbp->sb_fdblocks > sbp->sb_dblocks ||
249 !xfs_verify_icount(mp, sbp->sb_icount) ||
250 sbp->sb_ifree > sbp->sb_icount)) {
251 xfs_warn(mp, "SB summary counter sanity check failed");
252 return -EFSCORRUPTED;
255 if (!xfs_sb_is_v5(sbp))
259 * Version 5 superblock feature mask validation. Reject combinations
260 * the kernel cannot support since we checked for unsupported bits in
261 * the read verifier, which means that memory is corrupt.
263 if (xfs_sb_has_compat_feature(sbp, XFS_SB_FEAT_COMPAT_UNKNOWN)) {
265 "Corruption detected in superblock compatible features (0x%x)!",
266 (sbp->sb_features_compat & XFS_SB_FEAT_COMPAT_UNKNOWN));
267 return -EFSCORRUPTED;
270 if (!xfs_is_readonly(mp) &&
271 xfs_sb_has_ro_compat_feature(sbp, XFS_SB_FEAT_RO_COMPAT_UNKNOWN)) {
273 "Corruption detected in superblock read-only compatible features (0x%x)!",
274 (sbp->sb_features_ro_compat &
275 XFS_SB_FEAT_RO_COMPAT_UNKNOWN));
276 return -EFSCORRUPTED;
278 if (xfs_sb_has_incompat_feature(sbp, XFS_SB_FEAT_INCOMPAT_UNKNOWN)) {
280 "Corruption detected in superblock incompatible features (0x%x)!",
281 (sbp->sb_features_incompat &
282 XFS_SB_FEAT_INCOMPAT_UNKNOWN));
283 return -EFSCORRUPTED;
285 if (xfs_sb_has_incompat_log_feature(sbp,
286 XFS_SB_FEAT_INCOMPAT_LOG_UNKNOWN)) {
288 "Corruption detected in superblock incompatible log features (0x%x)!",
289 (sbp->sb_features_log_incompat &
290 XFS_SB_FEAT_INCOMPAT_LOG_UNKNOWN));
291 return -EFSCORRUPTED;
295 * We can't read verify the sb LSN because the read verifier is called
296 * before the log is allocated and processed. We know the log is set up
297 * before write verifier calls, so check it here.
299 if (!xfs_log_check_lsn(mp, sbp->sb_lsn))
300 return -EFSCORRUPTED;
305 /* Check the validity of the SB. */
307 xfs_validate_sb_common(
308 struct xfs_mount *mp,
312 struct xfs_dsb *dsb = bp->b_addr;
313 uint32_t agcount = 0;
317 if (!xfs_verify_magic(bp, dsb->sb_magicnum)) {
319 "Superblock has bad magic number 0x%x. Not an XFS filesystem?",
320 be32_to_cpu(dsb->sb_magicnum));
324 if (!xfs_sb_good_version(sbp)) {
326 "Superblock has unknown features enabled or corrupted feature masks.");
331 * Validate feature flags and state
333 if (xfs_sb_is_v5(sbp)) {
334 if (sbp->sb_blocksize < XFS_MIN_CRC_BLOCKSIZE) {
336 "Block size (%u bytes) too small for Version 5 superblock (minimum %d bytes)",
337 sbp->sb_blocksize, XFS_MIN_CRC_BLOCKSIZE);
338 return -EFSCORRUPTED;
341 /* V5 has a separate project quota inode */
342 if (sbp->sb_qflags & (XFS_OQUOTA_ENFD | XFS_OQUOTA_CHKD)) {
344 "Version 5 of Super block has XFS_OQUOTA bits.");
345 return -EFSCORRUPTED;
349 * Full inode chunks must be aligned to inode chunk size when
350 * sparse inodes are enabled to support the sparse chunk
351 * allocation algorithm and prevent overlapping inode records.
353 if (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_SPINODES) {
356 align = XFS_INODES_PER_CHUNK * sbp->sb_inodesize
358 if (sbp->sb_inoalignmt != align) {
360 "Inode block alignment (%u) must match chunk size (%u) for sparse inodes.",
361 sbp->sb_inoalignmt, align);
365 } else if (sbp->sb_qflags & (XFS_PQUOTA_ENFD | XFS_GQUOTA_ENFD |
366 XFS_PQUOTA_CHKD | XFS_GQUOTA_CHKD)) {
368 "Superblock earlier than Version 5 has XFS_{P|G}QUOTA_{ENFD|CHKD} bits.");
369 return -EFSCORRUPTED;
373 sbp->sb_logstart == 0 && mp->m_logdev_targp == mp->m_ddev_targp)) {
375 "filesystem is marked as having an external log; "
376 "specify logdev on the mount command line.");
381 sbp->sb_logstart != 0 && mp->m_logdev_targp != mp->m_ddev_targp)) {
383 "filesystem is marked as having an internal log; "
384 "do not specify logdev on the mount command line.");
388 /* Compute agcount for this number of dblocks and agblocks */
389 if (sbp->sb_agblocks) {
390 agcount = div_u64_rem(sbp->sb_dblocks, sbp->sb_agblocks, &rem);
396 * More sanity checking. Most of these were stolen directly from
400 sbp->sb_agcount <= 0 ||
401 sbp->sb_sectsize < XFS_MIN_SECTORSIZE ||
402 sbp->sb_sectsize > XFS_MAX_SECTORSIZE ||
403 sbp->sb_sectlog < XFS_MIN_SECTORSIZE_LOG ||
404 sbp->sb_sectlog > XFS_MAX_SECTORSIZE_LOG ||
405 sbp->sb_sectsize != (1 << sbp->sb_sectlog) ||
406 sbp->sb_blocksize < XFS_MIN_BLOCKSIZE ||
407 sbp->sb_blocksize > XFS_MAX_BLOCKSIZE ||
408 sbp->sb_blocklog < XFS_MIN_BLOCKSIZE_LOG ||
409 sbp->sb_blocklog > XFS_MAX_BLOCKSIZE_LOG ||
410 sbp->sb_blocksize != (1 << sbp->sb_blocklog) ||
411 sbp->sb_dirblklog + sbp->sb_blocklog > XFS_MAX_BLOCKSIZE_LOG ||
412 sbp->sb_inodesize < XFS_DINODE_MIN_SIZE ||
413 sbp->sb_inodesize > XFS_DINODE_MAX_SIZE ||
414 sbp->sb_inodelog < XFS_DINODE_MIN_LOG ||
415 sbp->sb_inodelog > XFS_DINODE_MAX_LOG ||
416 sbp->sb_inodesize != (1 << sbp->sb_inodelog) ||
417 sbp->sb_inopblock != howmany(sbp->sb_blocksize,sbp->sb_inodesize) ||
418 XFS_FSB_TO_B(mp, sbp->sb_agblocks) < XFS_MIN_AG_BYTES ||
419 XFS_FSB_TO_B(mp, sbp->sb_agblocks) > XFS_MAX_AG_BYTES ||
420 sbp->sb_agblklog != xfs_highbit32(sbp->sb_agblocks - 1) + 1 ||
421 agcount == 0 || agcount != sbp->sb_agcount ||
422 (sbp->sb_blocklog - sbp->sb_inodelog != sbp->sb_inopblog) ||
423 (sbp->sb_rextsize * sbp->sb_blocksize > XFS_MAX_RTEXTSIZE) ||
424 (sbp->sb_rextsize * sbp->sb_blocksize < XFS_MIN_RTEXTSIZE) ||
425 (sbp->sb_imax_pct > 100 /* zero sb_imax_pct is valid */) ||
426 sbp->sb_dblocks == 0 ||
427 sbp->sb_dblocks > XFS_MAX_DBLOCKS(sbp) ||
428 sbp->sb_dblocks < XFS_MIN_DBLOCKS(sbp) ||
429 sbp->sb_shared_vn != 0)) {
430 xfs_notice(mp, "SB sanity check failed");
431 return -EFSCORRUPTED;
435 * Logs that are too large are not supported at all. Reject them
436 * outright. Logs that are too small are tolerated on v4 filesystems,
437 * but we can only check that when mounting the log. Hence we skip
440 if (sbp->sb_logblocks > XFS_MAX_LOG_BLOCKS) {
442 "Log size 0x%x blocks too large, maximum size is 0x%llx blocks",
443 sbp->sb_logblocks, XFS_MAX_LOG_BLOCKS);
444 return -EFSCORRUPTED;
447 if (XFS_FSB_TO_B(mp, sbp->sb_logblocks) > XFS_MAX_LOG_BYTES) {
449 "log size 0x%llx bytes too large, maximum size is 0x%llx bytes",
450 XFS_FSB_TO_B(mp, sbp->sb_logblocks),
452 return -EFSCORRUPTED;
456 * Do not allow filesystems with corrupted log sector or stripe units to
457 * be mounted. We cannot safely size the iclogs or write to the log if
458 * the log stripe unit is not valid.
460 if (sbp->sb_versionnum & XFS_SB_VERSION_SECTORBIT) {
461 if (sbp->sb_logsectsize != (1U << sbp->sb_logsectlog)) {
463 "log sector size in bytes/log2 (0x%x/0x%x) must match",
464 sbp->sb_logsectsize, 1U << sbp->sb_logsectlog);
465 return -EFSCORRUPTED;
467 } else if (sbp->sb_logsectsize || sbp->sb_logsectlog) {
469 "log sector size in bytes/log2 (0x%x/0x%x) are not zero",
470 sbp->sb_logsectsize, sbp->sb_logsectlog);
471 return -EFSCORRUPTED;
474 if (sbp->sb_logsunit > 1) {
475 if (sbp->sb_logsunit % sbp->sb_blocksize) {
477 "log stripe unit 0x%x bytes must be a multiple of block size",
479 return -EFSCORRUPTED;
481 if (sbp->sb_logsunit > XLOG_MAX_RECORD_BSIZE) {
483 "log stripe unit 0x%x bytes over maximum size (0x%x bytes)",
484 sbp->sb_logsunit, XLOG_MAX_RECORD_BSIZE);
485 return -EFSCORRUPTED;
489 /* Validate the realtime geometry; stolen from xfs_repair */
490 if (sbp->sb_rextsize * sbp->sb_blocksize > XFS_MAX_RTEXTSIZE ||
491 sbp->sb_rextsize * sbp->sb_blocksize < XFS_MIN_RTEXTSIZE) {
493 "realtime extent sanity check failed");
494 return -EFSCORRUPTED;
497 if (sbp->sb_rblocks == 0) {
498 if (sbp->sb_rextents != 0 || sbp->sb_rbmblocks != 0 ||
499 sbp->sb_rextslog != 0 || sbp->sb_frextents != 0) {
501 "realtime zeroed geometry check failed");
502 return -EFSCORRUPTED;
508 rexts = div_u64(sbp->sb_rblocks, sbp->sb_rextsize);
509 rbmblocks = howmany_64(sbp->sb_rextents,
510 NBBY * sbp->sb_blocksize);
512 if (!xfs_validate_rtextents(rexts) ||
513 sbp->sb_rextents != rexts ||
514 sbp->sb_rextslog != xfs_compute_rextslog(rexts) ||
515 sbp->sb_rbmblocks != rbmblocks) {
517 "realtime geometry sanity check failed");
518 return -EFSCORRUPTED;
523 * Either (sb_unit and !hasdalign) or (!sb_unit and hasdalign)
524 * would imply the image is corrupted.
526 has_dalign = sbp->sb_versionnum & XFS_SB_VERSION_DALIGNBIT;
527 if (!!sbp->sb_unit ^ has_dalign) {
528 xfs_notice(mp, "SB stripe alignment sanity check failed");
529 return -EFSCORRUPTED;
532 if (!xfs_validate_stripe_geometry(mp, XFS_FSB_TO_B(mp, sbp->sb_unit),
533 XFS_FSB_TO_B(mp, sbp->sb_width), 0, false))
534 return -EFSCORRUPTED;
537 * Currently only very few inode sizes are supported.
539 switch (sbp->sb_inodesize) {
546 xfs_warn(mp, "inode size of %d bytes not supported",
555 xfs_sb_quota_from_disk(struct xfs_sb *sbp)
558 * older mkfs doesn't initialize quota inodes to NULLFSINO. This
559 * leads to in-core values having two different values for a quota
560 * inode to be invalid: 0 and NULLFSINO. Change it to a single value
563 * Note that this change affect only the in-core values. These
564 * values are not written back to disk unless any quota information
565 * is written to the disk. Even in that case, sb_pquotino field is
566 * not written to disk unless the superblock supports pquotino.
568 if (sbp->sb_uquotino == 0)
569 sbp->sb_uquotino = NULLFSINO;
570 if (sbp->sb_gquotino == 0)
571 sbp->sb_gquotino = NULLFSINO;
572 if (sbp->sb_pquotino == 0)
573 sbp->sb_pquotino = NULLFSINO;
576 * We need to do these manipilations only if we are working
577 * with an older version of on-disk superblock.
579 if (xfs_sb_is_v5(sbp))
582 if (sbp->sb_qflags & XFS_OQUOTA_ENFD)
583 sbp->sb_qflags |= (sbp->sb_qflags & XFS_PQUOTA_ACCT) ?
584 XFS_PQUOTA_ENFD : XFS_GQUOTA_ENFD;
585 if (sbp->sb_qflags & XFS_OQUOTA_CHKD)
586 sbp->sb_qflags |= (sbp->sb_qflags & XFS_PQUOTA_ACCT) ?
587 XFS_PQUOTA_CHKD : XFS_GQUOTA_CHKD;
588 sbp->sb_qflags &= ~(XFS_OQUOTA_ENFD | XFS_OQUOTA_CHKD);
590 if (sbp->sb_qflags & XFS_PQUOTA_ACCT &&
591 sbp->sb_gquotino != NULLFSINO) {
593 * In older version of superblock, on-disk superblock only
594 * has sb_gquotino, and in-core superblock has both sb_gquotino
595 * and sb_pquotino. But, only one of them is supported at any
596 * point of time. So, if PQUOTA is set in disk superblock,
597 * copy over sb_gquotino to sb_pquotino. The NULLFSINO test
598 * above is to make sure we don't do this twice and wipe them
601 sbp->sb_pquotino = sbp->sb_gquotino;
602 sbp->sb_gquotino = NULLFSINO;
609 struct xfs_dsb *from,
612 to->sb_magicnum = be32_to_cpu(from->sb_magicnum);
613 to->sb_blocksize = be32_to_cpu(from->sb_blocksize);
614 to->sb_dblocks = be64_to_cpu(from->sb_dblocks);
615 to->sb_rblocks = be64_to_cpu(from->sb_rblocks);
616 to->sb_rextents = be64_to_cpu(from->sb_rextents);
617 memcpy(&to->sb_uuid, &from->sb_uuid, sizeof(to->sb_uuid));
618 to->sb_logstart = be64_to_cpu(from->sb_logstart);
619 to->sb_rootino = be64_to_cpu(from->sb_rootino);
620 to->sb_rbmino = be64_to_cpu(from->sb_rbmino);
621 to->sb_rsumino = be64_to_cpu(from->sb_rsumino);
622 to->sb_rextsize = be32_to_cpu(from->sb_rextsize);
623 to->sb_agblocks = be32_to_cpu(from->sb_agblocks);
624 to->sb_agcount = be32_to_cpu(from->sb_agcount);
625 to->sb_rbmblocks = be32_to_cpu(from->sb_rbmblocks);
626 to->sb_logblocks = be32_to_cpu(from->sb_logblocks);
627 to->sb_versionnum = be16_to_cpu(from->sb_versionnum);
628 to->sb_sectsize = be16_to_cpu(from->sb_sectsize);
629 to->sb_inodesize = be16_to_cpu(from->sb_inodesize);
630 to->sb_inopblock = be16_to_cpu(from->sb_inopblock);
631 memcpy(&to->sb_fname, &from->sb_fname, sizeof(to->sb_fname));
632 to->sb_blocklog = from->sb_blocklog;
633 to->sb_sectlog = from->sb_sectlog;
634 to->sb_inodelog = from->sb_inodelog;
635 to->sb_inopblog = from->sb_inopblog;
636 to->sb_agblklog = from->sb_agblklog;
637 to->sb_rextslog = from->sb_rextslog;
638 to->sb_inprogress = from->sb_inprogress;
639 to->sb_imax_pct = from->sb_imax_pct;
640 to->sb_icount = be64_to_cpu(from->sb_icount);
641 to->sb_ifree = be64_to_cpu(from->sb_ifree);
642 to->sb_fdblocks = be64_to_cpu(from->sb_fdblocks);
643 to->sb_frextents = be64_to_cpu(from->sb_frextents);
644 to->sb_uquotino = be64_to_cpu(from->sb_uquotino);
645 to->sb_gquotino = be64_to_cpu(from->sb_gquotino);
646 to->sb_qflags = be16_to_cpu(from->sb_qflags);
647 to->sb_flags = from->sb_flags;
648 to->sb_shared_vn = from->sb_shared_vn;
649 to->sb_inoalignmt = be32_to_cpu(from->sb_inoalignmt);
650 to->sb_unit = be32_to_cpu(from->sb_unit);
651 to->sb_width = be32_to_cpu(from->sb_width);
652 to->sb_dirblklog = from->sb_dirblklog;
653 to->sb_logsectlog = from->sb_logsectlog;
654 to->sb_logsectsize = be16_to_cpu(from->sb_logsectsize);
655 to->sb_logsunit = be32_to_cpu(from->sb_logsunit);
656 to->sb_features2 = be32_to_cpu(from->sb_features2);
657 to->sb_bad_features2 = be32_to_cpu(from->sb_bad_features2);
658 to->sb_features_compat = be32_to_cpu(from->sb_features_compat);
659 to->sb_features_ro_compat = be32_to_cpu(from->sb_features_ro_compat);
660 to->sb_features_incompat = be32_to_cpu(from->sb_features_incompat);
661 to->sb_features_log_incompat =
662 be32_to_cpu(from->sb_features_log_incompat);
663 /* crc is only used on disk, not in memory; just init to 0 here. */
665 to->sb_spino_align = be32_to_cpu(from->sb_spino_align);
666 to->sb_pquotino = be64_to_cpu(from->sb_pquotino);
667 to->sb_lsn = be64_to_cpu(from->sb_lsn);
669 * sb_meta_uuid is only on disk if it differs from sb_uuid and the
670 * feature flag is set; if not set we keep it only in memory.
672 if (xfs_sb_is_v5(to) &&
673 (to->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_META_UUID))
674 uuid_copy(&to->sb_meta_uuid, &from->sb_meta_uuid);
676 uuid_copy(&to->sb_meta_uuid, &from->sb_uuid);
677 /* Convert on-disk flags to in-memory flags? */
679 xfs_sb_quota_from_disk(to);
685 struct xfs_dsb *from)
687 __xfs_sb_from_disk(to, from, true);
691 xfs_sb_quota_to_disk(
695 uint16_t qflags = from->sb_qflags;
697 to->sb_uquotino = cpu_to_be64(from->sb_uquotino);
700 * The in-memory superblock quota state matches the v5 on-disk format so
701 * just write them out and return
703 if (xfs_sb_is_v5(from)) {
704 to->sb_qflags = cpu_to_be16(from->sb_qflags);
705 to->sb_gquotino = cpu_to_be64(from->sb_gquotino);
706 to->sb_pquotino = cpu_to_be64(from->sb_pquotino);
711 * For older superblocks (v4), the in-core version of sb_qflags do not
712 * have XFS_OQUOTA_* flags, whereas the on-disk version does. So,
713 * convert incore XFS_{PG}QUOTA_* flags to on-disk XFS_OQUOTA_* flags.
715 qflags &= ~(XFS_PQUOTA_ENFD | XFS_PQUOTA_CHKD |
716 XFS_GQUOTA_ENFD | XFS_GQUOTA_CHKD);
718 if (from->sb_qflags &
719 (XFS_PQUOTA_ENFD | XFS_GQUOTA_ENFD))
720 qflags |= XFS_OQUOTA_ENFD;
721 if (from->sb_qflags &
722 (XFS_PQUOTA_CHKD | XFS_GQUOTA_CHKD))
723 qflags |= XFS_OQUOTA_CHKD;
724 to->sb_qflags = cpu_to_be16(qflags);
727 * GQUOTINO and PQUOTINO cannot be used together in versions
728 * of superblock that do not have pquotino. from->sb_flags
729 * tells us which quota is active and should be copied to
730 * disk. If neither are active, we should NULL the inode.
732 * In all cases, the separate pquotino must remain 0 because it
733 * is beyond the "end" of the valid non-pquotino superblock.
735 if (from->sb_qflags & XFS_GQUOTA_ACCT)
736 to->sb_gquotino = cpu_to_be64(from->sb_gquotino);
737 else if (from->sb_qflags & XFS_PQUOTA_ACCT)
738 to->sb_gquotino = cpu_to_be64(from->sb_pquotino);
741 * We can't rely on just the fields being logged to tell us
742 * that it is safe to write NULLFSINO - we should only do that
743 * if quotas are not actually enabled. Hence only write
744 * NULLFSINO if both in-core quota inodes are NULL.
746 if (from->sb_gquotino == NULLFSINO &&
747 from->sb_pquotino == NULLFSINO)
748 to->sb_gquotino = cpu_to_be64(NULLFSINO);
759 xfs_sb_quota_to_disk(to, from);
761 to->sb_magicnum = cpu_to_be32(from->sb_magicnum);
762 to->sb_blocksize = cpu_to_be32(from->sb_blocksize);
763 to->sb_dblocks = cpu_to_be64(from->sb_dblocks);
764 to->sb_rblocks = cpu_to_be64(from->sb_rblocks);
765 to->sb_rextents = cpu_to_be64(from->sb_rextents);
766 memcpy(&to->sb_uuid, &from->sb_uuid, sizeof(to->sb_uuid));
767 to->sb_logstart = cpu_to_be64(from->sb_logstart);
768 to->sb_rootino = cpu_to_be64(from->sb_rootino);
769 to->sb_rbmino = cpu_to_be64(from->sb_rbmino);
770 to->sb_rsumino = cpu_to_be64(from->sb_rsumino);
771 to->sb_rextsize = cpu_to_be32(from->sb_rextsize);
772 to->sb_agblocks = cpu_to_be32(from->sb_agblocks);
773 to->sb_agcount = cpu_to_be32(from->sb_agcount);
774 to->sb_rbmblocks = cpu_to_be32(from->sb_rbmblocks);
775 to->sb_logblocks = cpu_to_be32(from->sb_logblocks);
776 to->sb_versionnum = cpu_to_be16(from->sb_versionnum);
777 to->sb_sectsize = cpu_to_be16(from->sb_sectsize);
778 to->sb_inodesize = cpu_to_be16(from->sb_inodesize);
779 to->sb_inopblock = cpu_to_be16(from->sb_inopblock);
780 memcpy(&to->sb_fname, &from->sb_fname, sizeof(to->sb_fname));
781 to->sb_blocklog = from->sb_blocklog;
782 to->sb_sectlog = from->sb_sectlog;
783 to->sb_inodelog = from->sb_inodelog;
784 to->sb_inopblog = from->sb_inopblog;
785 to->sb_agblklog = from->sb_agblklog;
786 to->sb_rextslog = from->sb_rextslog;
787 to->sb_inprogress = from->sb_inprogress;
788 to->sb_imax_pct = from->sb_imax_pct;
789 to->sb_icount = cpu_to_be64(from->sb_icount);
790 to->sb_ifree = cpu_to_be64(from->sb_ifree);
791 to->sb_fdblocks = cpu_to_be64(from->sb_fdblocks);
792 to->sb_frextents = cpu_to_be64(from->sb_frextents);
794 to->sb_flags = from->sb_flags;
795 to->sb_shared_vn = from->sb_shared_vn;
796 to->sb_inoalignmt = cpu_to_be32(from->sb_inoalignmt);
797 to->sb_unit = cpu_to_be32(from->sb_unit);
798 to->sb_width = cpu_to_be32(from->sb_width);
799 to->sb_dirblklog = from->sb_dirblklog;
800 to->sb_logsectlog = from->sb_logsectlog;
801 to->sb_logsectsize = cpu_to_be16(from->sb_logsectsize);
802 to->sb_logsunit = cpu_to_be32(from->sb_logsunit);
805 * We need to ensure that bad_features2 always matches features2.
806 * Hence we enforce that here rather than having to remember to do it
807 * everywhere else that updates features2.
809 from->sb_bad_features2 = from->sb_features2;
810 to->sb_features2 = cpu_to_be32(from->sb_features2);
811 to->sb_bad_features2 = cpu_to_be32(from->sb_bad_features2);
813 if (!xfs_sb_is_v5(from))
816 to->sb_features_compat = cpu_to_be32(from->sb_features_compat);
817 to->sb_features_ro_compat =
818 cpu_to_be32(from->sb_features_ro_compat);
819 to->sb_features_incompat =
820 cpu_to_be32(from->sb_features_incompat);
821 to->sb_features_log_incompat =
822 cpu_to_be32(from->sb_features_log_incompat);
823 to->sb_spino_align = cpu_to_be32(from->sb_spino_align);
824 to->sb_lsn = cpu_to_be64(from->sb_lsn);
825 if (from->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_META_UUID)
826 uuid_copy(&to->sb_meta_uuid, &from->sb_meta_uuid);
830 * If the superblock has the CRC feature bit set or the CRC field is non-null,
831 * check that the CRC is valid. We check the CRC field is non-null because a
832 * single bit error could clear the feature bit and unused parts of the
833 * superblock are supposed to be zero. Hence a non-null crc field indicates that
834 * we've potentially lost a feature bit and we should check it anyway.
836 * However, past bugs (i.e. in growfs) left non-zeroed regions beyond the
837 * last field in V4 secondary superblocks. So for secondary superblocks,
838 * we are more forgiving, and ignore CRC failures if the primary doesn't
839 * indicate that the fs version is V5.
846 struct xfs_mount *mp = bp->b_mount;
847 struct xfs_dsb *dsb = bp->b_addr;
851 * open code the version check to avoid needing to convert the entire
852 * superblock from disk order just to check the version number
854 if (dsb->sb_magicnum == cpu_to_be32(XFS_SB_MAGIC) &&
855 (((be16_to_cpu(dsb->sb_versionnum) & XFS_SB_VERSION_NUMBITS) ==
859 if (!xfs_buf_verify_cksum(bp, XFS_SB_CRC_OFF)) {
860 /* Only fail bad secondaries on a known V5 filesystem */
861 if (xfs_buf_daddr(bp) == XFS_SB_DADDR ||
870 * Check all the superblock fields. Don't byteswap the xquota flags
871 * because _verify_common checks the on-disk values.
873 __xfs_sb_from_disk(&sb, dsb, false);
874 error = xfs_validate_sb_common(mp, bp, &sb);
877 error = xfs_validate_sb_read(mp, &sb);
880 if (error == -EFSCORRUPTED || error == -EFSBADCRC)
881 xfs_verifier_error(bp, error, __this_address);
883 xfs_buf_ioerror(bp, error);
887 * We may be probed for a filesystem match, so we may not want to emit
888 * messages when the superblock buffer is not actually an XFS superblock.
889 * If we find an XFS superblock, then run a normal, noisy mount because we are
890 * really going to mount it and want to know about errors.
893 xfs_sb_quiet_read_verify(
896 struct xfs_dsb *dsb = bp->b_addr;
898 if (dsb->sb_magicnum == cpu_to_be32(XFS_SB_MAGIC)) {
899 /* XFS filesystem, verify noisily! */
900 xfs_sb_read_verify(bp);
904 xfs_buf_ioerror(bp, -EWRONGFS);
912 struct xfs_mount *mp = bp->b_mount;
913 struct xfs_buf_log_item *bip = bp->b_log_item;
914 struct xfs_dsb *dsb = bp->b_addr;
918 * Check all the superblock fields. Don't byteswap the xquota flags
919 * because _verify_common checks the on-disk values.
921 __xfs_sb_from_disk(&sb, dsb, false);
922 error = xfs_validate_sb_common(mp, bp, &sb);
925 error = xfs_validate_sb_write(mp, bp, &sb);
929 if (!xfs_sb_is_v5(&sb))
933 dsb->sb_lsn = cpu_to_be64(bip->bli_item.li_lsn);
935 xfs_buf_update_cksum(bp, XFS_SB_CRC_OFF);
939 xfs_verifier_error(bp, error, __this_address);
942 const struct xfs_buf_ops xfs_sb_buf_ops = {
944 .magic = { cpu_to_be32(XFS_SB_MAGIC), cpu_to_be32(XFS_SB_MAGIC) },
945 .verify_read = xfs_sb_read_verify,
946 .verify_write = xfs_sb_write_verify,
949 const struct xfs_buf_ops xfs_sb_quiet_buf_ops = {
950 .name = "xfs_sb_quiet",
951 .magic = { cpu_to_be32(XFS_SB_MAGIC), cpu_to_be32(XFS_SB_MAGIC) },
952 .verify_read = xfs_sb_quiet_read_verify,
953 .verify_write = xfs_sb_write_verify,
959 * Mount initialization code establishing various mount
960 * fields from the superblock associated with the given
963 * Inode geometry are calculated in xfs_ialloc_setup_geometry.
967 struct xfs_mount *mp,
971 atomic_set(&mp->m_agirotor, 0);
972 mp->m_maxagi = mp->m_sb.sb_agcount;
973 mp->m_blkbit_log = sbp->sb_blocklog + XFS_NBBYLOG;
974 mp->m_blkbb_log = sbp->sb_blocklog - BBSHIFT;
975 mp->m_sectbb_log = sbp->sb_sectlog - BBSHIFT;
976 mp->m_agno_log = xfs_highbit32(sbp->sb_agcount - 1) + 1;
977 mp->m_blockmask = sbp->sb_blocksize - 1;
978 mp->m_blockwsize = sbp->sb_blocksize >> XFS_WORDLOG;
979 mp->m_blockwmask = mp->m_blockwsize - 1;
980 mp->m_rtxblklog = log2_if_power2(sbp->sb_rextsize);
981 mp->m_rtxblkmask = mask64_if_power2(sbp->sb_rextsize);
983 mp->m_alloc_mxr[0] = xfs_allocbt_maxrecs(mp, sbp->sb_blocksize, 1);
984 mp->m_alloc_mxr[1] = xfs_allocbt_maxrecs(mp, sbp->sb_blocksize, 0);
985 mp->m_alloc_mnr[0] = mp->m_alloc_mxr[0] / 2;
986 mp->m_alloc_mnr[1] = mp->m_alloc_mxr[1] / 2;
988 mp->m_bmap_dmxr[0] = xfs_bmbt_maxrecs(mp, sbp->sb_blocksize, 1);
989 mp->m_bmap_dmxr[1] = xfs_bmbt_maxrecs(mp, sbp->sb_blocksize, 0);
990 mp->m_bmap_dmnr[0] = mp->m_bmap_dmxr[0] / 2;
991 mp->m_bmap_dmnr[1] = mp->m_bmap_dmxr[1] / 2;
993 mp->m_rmap_mxr[0] = xfs_rmapbt_maxrecs(sbp->sb_blocksize, 1);
994 mp->m_rmap_mxr[1] = xfs_rmapbt_maxrecs(sbp->sb_blocksize, 0);
995 mp->m_rmap_mnr[0] = mp->m_rmap_mxr[0] / 2;
996 mp->m_rmap_mnr[1] = mp->m_rmap_mxr[1] / 2;
998 mp->m_refc_mxr[0] = xfs_refcountbt_maxrecs(sbp->sb_blocksize, true);
999 mp->m_refc_mxr[1] = xfs_refcountbt_maxrecs(sbp->sb_blocksize, false);
1000 mp->m_refc_mnr[0] = mp->m_refc_mxr[0] / 2;
1001 mp->m_refc_mnr[1] = mp->m_refc_mxr[1] / 2;
1003 mp->m_bsize = XFS_FSB_TO_BB(mp, 1);
1004 mp->m_alloc_set_aside = xfs_alloc_set_aside(mp);
1005 mp->m_ag_max_usable = xfs_alloc_ag_max_usable(mp);
1009 * xfs_log_sb() can be used to copy arbitrary changes to the in-core superblock
1010 * into the superblock buffer to be logged. It does not provide the higher
1011 * level of locking that is needed to protect the in-core superblock from
1012 * concurrent access.
1016 struct xfs_trans *tp)
1018 struct xfs_mount *mp = tp->t_mountp;
1019 struct xfs_buf *bp = xfs_trans_getsb(tp);
1022 * Lazy sb counters don't update the in-core superblock so do that now.
1023 * If this is at unmount, the counters will be exactly correct, but at
1024 * any other time they will only be ballpark correct because of
1025 * reservations that have been taken out percpu counters. If we have an
1026 * unclean shutdown, this will be corrected by log recovery rebuilding
1027 * the counters from the AGF block counts.
1029 * Do not update sb_frextents here because it is not part of the lazy
1030 * sb counters, despite having a percpu counter. It is always kept
1031 * consistent with the ondisk rtbitmap by xfs_trans_apply_sb_deltas()
1032 * and hence we don't need have to update it here.
1034 if (xfs_has_lazysbcount(mp)) {
1035 mp->m_sb.sb_icount = percpu_counter_sum(&mp->m_icount);
1036 mp->m_sb.sb_ifree = min_t(uint64_t,
1037 percpu_counter_sum(&mp->m_ifree),
1038 mp->m_sb.sb_icount);
1039 mp->m_sb.sb_fdblocks = percpu_counter_sum(&mp->m_fdblocks);
1042 xfs_sb_to_disk(bp->b_addr, &mp->m_sb);
1043 xfs_trans_buf_set_type(tp, bp, XFS_BLFT_SB_BUF);
1044 xfs_trans_log_buf(tp, bp, 0, sizeof(struct xfs_dsb) - 1);
1050 * Sync the superblock to disk.
1052 * Note that the caller is responsible for checking the frozen state of the
1053 * filesystem. This procedure uses the non-blocking transaction allocator and
1054 * thus will allow modifications to a frozen fs. This is required because this
1055 * code can be called during the process of freezing where use of the high-level
1056 * allocator would deadlock.
1060 struct xfs_mount *mp,
1063 struct xfs_trans *tp;
1066 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_sb, 0, 0,
1067 XFS_TRANS_NO_WRITECOUNT, &tp);
1073 xfs_trans_set_sync(tp);
1074 return xfs_trans_commit(tp);
1078 * Update all the secondary superblocks to match the new state of the primary.
1079 * Because we are completely overwriting all the existing fields in the
1080 * secondary superblock buffers, there is no need to read them in from disk.
1081 * Just get a new buffer, stamp it and write it.
1083 * The sb buffers need to be cached here so that we serialise against other
1084 * operations that access the secondary superblocks, but we don't want to keep
1085 * them in memory once it is written so we mark it as a one-shot buffer.
1088 xfs_update_secondary_sbs(
1089 struct xfs_mount *mp)
1091 struct xfs_perag *pag;
1092 xfs_agnumber_t agno = 1;
1093 int saved_error = 0;
1095 LIST_HEAD (buffer_list);
1097 /* update secondary superblocks. */
1098 for_each_perag_from(mp, agno, pag) {
1101 error = xfs_buf_get(mp->m_ddev_targp,
1102 XFS_AG_DADDR(mp, pag->pag_agno, XFS_SB_DADDR),
1103 XFS_FSS_TO_BB(mp, 1), &bp);
1105 * If we get an error reading or writing alternate superblocks,
1106 * continue. xfs_repair chooses the "best" superblock based
1107 * on most matches; if we break early, we'll leave more
1108 * superblocks un-updated than updated, and xfs_repair may
1109 * pick them over the properly-updated primary.
1113 "error allocating secondary superblock for ag %d",
1116 saved_error = error;
1120 bp->b_ops = &xfs_sb_buf_ops;
1121 xfs_buf_oneshot(bp);
1122 xfs_buf_zero(bp, 0, BBTOB(bp->b_length));
1123 xfs_sb_to_disk(bp->b_addr, &mp->m_sb);
1124 xfs_buf_delwri_queue(bp, &buffer_list);
1127 /* don't hold too many buffers at once */
1131 error = xfs_buf_delwri_submit(&buffer_list);
1134 "write error %d updating a secondary superblock near ag %d",
1135 error, pag->pag_agno);
1137 saved_error = error;
1141 error = xfs_buf_delwri_submit(&buffer_list);
1144 "write error %d updating a secondary superblock near ag %d",
1148 return saved_error ? saved_error : error;
1152 * Same behavior as xfs_sync_sb, except that it is always synchronous and it
1153 * also writes the superblock buffer to disk sector 0 immediately.
1157 struct xfs_mount *mp)
1159 struct xfs_trans *tp;
1163 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_sb, 0, 0, 0, &tp);
1167 bp = xfs_trans_getsb(tp);
1169 xfs_trans_bhold(tp, bp);
1170 xfs_trans_set_sync(tp);
1171 error = xfs_trans_commit(tp);
1175 * write out the sb buffer to get the changes to disk
1177 error = xfs_bwrite(bp);
1185 struct xfs_mount *mp,
1186 struct xfs_fsop_geom *geo,
1189 struct xfs_sb *sbp = &mp->m_sb;
1191 memset(geo, 0, sizeof(struct xfs_fsop_geom));
1193 geo->blocksize = sbp->sb_blocksize;
1194 geo->rtextsize = sbp->sb_rextsize;
1195 geo->agblocks = sbp->sb_agblocks;
1196 geo->agcount = sbp->sb_agcount;
1197 geo->logblocks = sbp->sb_logblocks;
1198 geo->sectsize = sbp->sb_sectsize;
1199 geo->inodesize = sbp->sb_inodesize;
1200 geo->imaxpct = sbp->sb_imax_pct;
1201 geo->datablocks = sbp->sb_dblocks;
1202 geo->rtblocks = sbp->sb_rblocks;
1203 geo->rtextents = sbp->sb_rextents;
1204 geo->logstart = sbp->sb_logstart;
1205 BUILD_BUG_ON(sizeof(geo->uuid) != sizeof(sbp->sb_uuid));
1206 memcpy(geo->uuid, &sbp->sb_uuid, sizeof(sbp->sb_uuid));
1208 if (struct_version < 2)
1211 geo->sunit = sbp->sb_unit;
1212 geo->swidth = sbp->sb_width;
1214 if (struct_version < 3)
1217 geo->version = XFS_FSOP_GEOM_VERSION;
1218 geo->flags = XFS_FSOP_GEOM_FLAGS_NLINK |
1219 XFS_FSOP_GEOM_FLAGS_DIRV2 |
1220 XFS_FSOP_GEOM_FLAGS_EXTFLG;
1221 if (xfs_has_attr(mp))
1222 geo->flags |= XFS_FSOP_GEOM_FLAGS_ATTR;
1223 if (xfs_has_quota(mp))
1224 geo->flags |= XFS_FSOP_GEOM_FLAGS_QUOTA;
1225 if (xfs_has_align(mp))
1226 geo->flags |= XFS_FSOP_GEOM_FLAGS_IALIGN;
1227 if (xfs_has_dalign(mp))
1228 geo->flags |= XFS_FSOP_GEOM_FLAGS_DALIGN;
1229 if (xfs_has_asciici(mp))
1230 geo->flags |= XFS_FSOP_GEOM_FLAGS_DIRV2CI;
1231 if (xfs_has_lazysbcount(mp))
1232 geo->flags |= XFS_FSOP_GEOM_FLAGS_LAZYSB;
1233 if (xfs_has_attr2(mp))
1234 geo->flags |= XFS_FSOP_GEOM_FLAGS_ATTR2;
1235 if (xfs_has_projid32(mp))
1236 geo->flags |= XFS_FSOP_GEOM_FLAGS_PROJID32;
1237 if (xfs_has_crc(mp))
1238 geo->flags |= XFS_FSOP_GEOM_FLAGS_V5SB;
1239 if (xfs_has_ftype(mp))
1240 geo->flags |= XFS_FSOP_GEOM_FLAGS_FTYPE;
1241 if (xfs_has_finobt(mp))
1242 geo->flags |= XFS_FSOP_GEOM_FLAGS_FINOBT;
1243 if (xfs_has_sparseinodes(mp))
1244 geo->flags |= XFS_FSOP_GEOM_FLAGS_SPINODES;
1245 if (xfs_has_rmapbt(mp))
1246 geo->flags |= XFS_FSOP_GEOM_FLAGS_RMAPBT;
1247 if (xfs_has_reflink(mp))
1248 geo->flags |= XFS_FSOP_GEOM_FLAGS_REFLINK;
1249 if (xfs_has_bigtime(mp))
1250 geo->flags |= XFS_FSOP_GEOM_FLAGS_BIGTIME;
1251 if (xfs_has_inobtcounts(mp))
1252 geo->flags |= XFS_FSOP_GEOM_FLAGS_INOBTCNT;
1253 if (xfs_has_sector(mp)) {
1254 geo->flags |= XFS_FSOP_GEOM_FLAGS_SECTOR;
1255 geo->logsectsize = sbp->sb_logsectsize;
1257 geo->logsectsize = BBSIZE;
1259 if (xfs_has_large_extent_counts(mp))
1260 geo->flags |= XFS_FSOP_GEOM_FLAGS_NREXT64;
1261 geo->rtsectsize = sbp->sb_blocksize;
1262 geo->dirblocksize = xfs_dir2_dirblock_bytes(sbp);
1264 if (struct_version < 4)
1267 if (xfs_has_logv2(mp))
1268 geo->flags |= XFS_FSOP_GEOM_FLAGS_LOGV2;
1270 geo->logsunit = sbp->sb_logsunit;
1272 if (struct_version < 5)
1275 geo->version = XFS_FSOP_GEOM_VERSION_V5;
1278 /* Read a secondary superblock. */
1280 xfs_sb_read_secondary(
1281 struct xfs_mount *mp,
1282 struct xfs_trans *tp,
1283 xfs_agnumber_t agno,
1284 struct xfs_buf **bpp)
1289 ASSERT(agno != 0 && agno != NULLAGNUMBER);
1290 error = xfs_trans_read_buf(mp, tp, mp->m_ddev_targp,
1291 XFS_AG_DADDR(mp, agno, XFS_SB_BLOCK(mp)),
1292 XFS_FSS_TO_BB(mp, 1), 0, &bp, &xfs_sb_buf_ops);
1293 if (xfs_metadata_is_sick(error))
1294 xfs_agno_mark_sick(mp, agno, XFS_SICK_AG_SB);
1297 xfs_buf_set_ref(bp, XFS_SSB_REF);
1302 /* Get an uninitialised secondary superblock buffer. */
1304 xfs_sb_get_secondary(
1305 struct xfs_mount *mp,
1306 struct xfs_trans *tp,
1307 xfs_agnumber_t agno,
1308 struct xfs_buf **bpp)
1313 ASSERT(agno != 0 && agno != NULLAGNUMBER);
1314 error = xfs_trans_get_buf(tp, mp->m_ddev_targp,
1315 XFS_AG_DADDR(mp, agno, XFS_SB_BLOCK(mp)),
1316 XFS_FSS_TO_BB(mp, 1), 0, &bp);
1319 bp->b_ops = &xfs_sb_buf_ops;
1320 xfs_buf_oneshot(bp);
1326 * sunit, swidth, sectorsize(optional with 0) should be all in bytes,
1327 * so users won't be confused by values in error messages.
1330 xfs_validate_stripe_geometry(
1331 struct xfs_mount *mp,
1337 if (swidth > INT_MAX) {
1340 "stripe width (%lld) is too large", swidth);
1344 if (sunit > swidth) {
1347 "stripe unit (%lld) is larger than the stripe width (%lld)", sunit, swidth);
1351 if (sectorsize && (int)sunit % sectorsize) {
1354 "stripe unit (%lld) must be a multiple of the sector size (%d)",
1359 if (sunit && !swidth) {
1362 "invalid stripe unit (%lld) and stripe width of 0", sunit);
1366 if (!sunit && swidth) {
1369 "invalid stripe width (%lld) and stripe unit of 0", swidth);
1373 if (sunit && (int)swidth % (int)sunit) {
1376 "stripe width (%lld) must be a multiple of the stripe unit (%lld)",
1384 * Compute the maximum level number of the realtime summary file, as defined by
1385 * mkfs. The historic use of highbit32 on a 64-bit quantity prohibited correct
1386 * use of rt volumes with more than 2^32 extents.
1389 xfs_compute_rextslog(
1390 xfs_rtbxlen_t rtextents)
1394 return xfs_highbit64(rtextents);