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git.ipfire.org Git - thirdparty/xfsprogs-dev.git/blob - repair/agheader.c
2 * Copyright (c) 2000-2001,2005 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
19 #include "xfs/libxfs.h"
23 #include "err_protos.h"
26 * XXX (dgc): What is the point of all the check and repair here when phase 5
27 * recreates the AGF/AGI/AGFL completely from scratch?
31 verify_set_agf(xfs_mount_t
*mp
, xfs_agf_t
*agf
, xfs_agnumber_t i
)
33 xfs_rfsblock_t agblocks
;
36 /* check common fields */
38 if (be32_to_cpu(agf
->agf_magicnum
) != XFS_AGF_MAGIC
) {
40 do_warn(_("bad magic # 0x%x for agf %d\n"),
41 be32_to_cpu(agf
->agf_magicnum
), i
);
44 agf
->agf_magicnum
= cpu_to_be32(XFS_AGF_MAGIC
);
47 if (!XFS_AGF_GOOD_VERSION(be32_to_cpu(agf
->agf_versionnum
))) {
49 do_warn(_("bad version # %d for agf %d\n"),
50 be32_to_cpu(agf
->agf_versionnum
), i
);
53 agf
->agf_versionnum
= cpu_to_be32(XFS_AGF_VERSION
);
56 if (be32_to_cpu(agf
->agf_seqno
) != i
) {
58 do_warn(_("bad sequence # %d for agf %d\n"),
59 be32_to_cpu(agf
->agf_seqno
), i
);
62 agf
->agf_seqno
= cpu_to_be32(i
);
65 if (be32_to_cpu(agf
->agf_length
) != mp
->m_sb
.sb_agblocks
) {
66 if (i
!= mp
->m_sb
.sb_agcount
- 1) {
68 do_warn(_("bad length %d for agf %d, should be %d\n"),
69 be32_to_cpu(agf
->agf_length
), i
,
70 mp
->m_sb
.sb_agblocks
);
73 cpu_to_be32(mp
->m_sb
.sb_agblocks
);
75 agblocks
= mp
->m_sb
.sb_dblocks
-
76 (xfs_rfsblock_t
) mp
->m_sb
.sb_agblocks
* i
;
78 if (be32_to_cpu(agf
->agf_length
) != agblocks
) {
81 _("bad length %d for agf %d, should be %" PRIu64
"\n"),
82 be32_to_cpu(agf
->agf_length
),
85 agf
->agf_length
= cpu_to_be32(agblocks
);
91 * check first/last AGF fields. if need be, lose the free
92 * space in the AGFL, we'll reclaim it later.
94 if (be32_to_cpu(agf
->agf_flfirst
) >= XFS_AGFL_SIZE(mp
)) {
95 do_warn(_("flfirst %d in agf %d too large (max = %zu)\n"),
96 be32_to_cpu(agf
->agf_flfirst
),
97 i
, XFS_AGFL_SIZE(mp
));
99 agf
->agf_flfirst
= cpu_to_be32(0);
102 if (be32_to_cpu(agf
->agf_fllast
) >= XFS_AGFL_SIZE(mp
)) {
103 do_warn(_("fllast %d in agf %d too large (max = %zu)\n"),
104 be32_to_cpu(agf
->agf_fllast
),
105 i
, XFS_AGFL_SIZE(mp
));
107 agf
->agf_fllast
= cpu_to_be32(0);
110 /* don't check freespace btrees -- will be checked by caller */
112 if (!xfs_sb_version_hascrc(&mp
->m_sb
))
115 if (platform_uuid_compare(&agf
->agf_uuid
, &mp
->m_sb
.sb_uuid
)) {
119 platform_uuid_unparse(&agf
->agf_uuid
, uu
);
120 do_warn(_("bad uuid %s for agf %d\n"), uu
, i
);
123 platform_uuid_copy(&agf
->agf_uuid
, &mp
->m_sb
.sb_uuid
);
129 verify_set_agi(xfs_mount_t
*mp
, xfs_agi_t
*agi
, xfs_agnumber_t agno
)
131 xfs_rfsblock_t agblocks
;
134 /* check common fields */
136 if (be32_to_cpu(agi
->agi_magicnum
) != XFS_AGI_MAGIC
) {
138 do_warn(_("bad magic # 0x%x for agi %d\n"),
139 be32_to_cpu(agi
->agi_magicnum
), agno
);
142 agi
->agi_magicnum
= cpu_to_be32(XFS_AGI_MAGIC
);
145 if (!XFS_AGI_GOOD_VERSION(be32_to_cpu(agi
->agi_versionnum
))) {
147 do_warn(_("bad version # %d for agi %d\n"),
148 be32_to_cpu(agi
->agi_versionnum
), agno
);
151 agi
->agi_versionnum
= cpu_to_be32(XFS_AGI_VERSION
);
154 if (be32_to_cpu(agi
->agi_seqno
) != agno
) {
156 do_warn(_("bad sequence # %d for agi %d\n"),
157 be32_to_cpu(agi
->agi_seqno
), agno
);
160 agi
->agi_seqno
= cpu_to_be32(agno
);
163 if (be32_to_cpu(agi
->agi_length
) != mp
->m_sb
.sb_agblocks
) {
164 if (agno
!= mp
->m_sb
.sb_agcount
- 1) {
166 do_warn(_("bad length # %d for agi %d, should be %d\n"),
167 be32_to_cpu(agi
->agi_length
), agno
,
168 mp
->m_sb
.sb_agblocks
);
171 cpu_to_be32(mp
->m_sb
.sb_agblocks
);
173 agblocks
= mp
->m_sb
.sb_dblocks
-
174 (xfs_rfsblock_t
) mp
->m_sb
.sb_agblocks
* agno
;
176 if (be32_to_cpu(agi
->agi_length
) != agblocks
) {
179 _("bad length # %d for agi %d, should be %" PRIu64
"\n"),
180 be32_to_cpu(agi
->agi_length
),
183 agi
->agi_length
= cpu_to_be32(agblocks
);
188 /* don't check inode btree -- will be checked by caller */
190 if (!xfs_sb_version_hascrc(&mp
->m_sb
))
193 if (platform_uuid_compare(&agi
->agi_uuid
, &mp
->m_sb
.sb_uuid
)) {
197 platform_uuid_unparse(&agi
->agi_uuid
, uu
);
198 do_warn(_("bad uuid %s for agi %d\n"), uu
, agno
);
201 platform_uuid_copy(&agi
->agi_uuid
, &mp
->m_sb
.sb_uuid
);
208 * superblock comparison - compare arbitrary superblock with
209 * filesystem mount-point superblock
211 * the verified fields include id and geometry.
213 * the inprogress fields, version numbers, and counters
214 * are allowed to differ as well as all fields after the
215 * counters to cope with the pre-6.5 mkfs non-zeroed
216 * secondary superblock sectors.
219 compare_sb(xfs_mount_t
*mp
, xfs_sb_t
*sb
)
221 fs_geometry_t fs_geo
, sb_geo
;
223 get_sb_geometry(&fs_geo
, &mp
->m_sb
);
224 get_sb_geometry(&sb_geo
, sb
);
226 if (memcmp(&fs_geo
, &sb_geo
,
227 (char *) &fs_geo
.sb_shared_vn
- (char *) &fs_geo
))
228 return(XR_SB_GEO_MISMATCH
);
234 * Possible fields that may have been set at mkfs time,
235 * sb_inoalignmt, sb_unit, sb_width and sb_dirblklog.
236 * The quota inode fields in the secondaries should be zero.
237 * Likewise, the sb_flags and sb_shared_vn should also be
238 * zero and the shared version bit should be cleared for
241 * And everything else in the buffer beyond either sb_width,
242 * sb_dirblklog (v2 dirs), or sb_logsectsize can be zeroed.
244 * Note: contrary to the name, this routine is called for all
245 * superblocks, not just the secondary superblocks.
249 struct xfs_mount
*mp
,
250 struct xfs_buf
*sbuf
,
254 struct xfs_dsb
*dsb
= XFS_BUF_TO_SBP(sbuf
);
263 * Check for garbage beyond the last valid field.
264 * Use field addresses instead so this code will still
265 * work against older filesystems when the superblock
266 * gets rev'ed again with new fields appended.
268 * size is the size of data which is valid for this sb.
270 if (xfs_sb_version_hascrc(sb
))
271 size
= offsetof(xfs_sb_t
, sb_lsn
)
272 + sizeof(sb
->sb_lsn
);
273 else if (xfs_sb_version_hasmorebits(sb
))
274 size
= offsetof(xfs_sb_t
, sb_bad_features2
)
275 + sizeof(sb
->sb_bad_features2
);
276 else if (xfs_sb_version_haslogv2(sb
))
277 size
= offsetof(xfs_sb_t
, sb_logsunit
)
278 + sizeof(sb
->sb_logsunit
);
279 else if (xfs_sb_version_hassector(sb
))
280 size
= offsetof(xfs_sb_t
, sb_logsectsize
)
281 + sizeof(sb
->sb_logsectsize
);
282 else /* only support dirv2 or more recent */
283 size
= offsetof(xfs_sb_t
, sb_dirblklog
)
284 + sizeof(sb
->sb_dirblklog
);
286 /* Check the buffer we read from disk for garbage outside size */
287 for (ip
= XFS_BUF_PTR(sbuf
) + size
;
288 ip
< XFS_BUF_PTR(sbuf
) + mp
->m_sb
.sb_sectsize
;
296 rval
|= XR_AG_SB_SEC
;
299 _("zeroing unused portion of %s superblock (AG #%u)\n"),
300 !i
? _("primary") : _("secondary"), i
);
302 * zero both the in-memory sb and the disk buffer,
303 * because the former was read from disk and
304 * may contain newer version fields that shouldn't
305 * be set, and the latter is never updated past
306 * the last field - just zap them both.
308 memset((void *)((intptr_t)sb
+ size
), 0,
309 mp
->m_sb
.sb_sectsize
- size
);
310 memset(XFS_BUF_PTR(sbuf
) + size
, 0,
311 mp
->m_sb
.sb_sectsize
- size
);
314 _("would zero unused portion of %s superblock (AG #%u)\n"),
315 !i
? _("primary") : _("secondary"), i
);
319 * now look for the fields we can manipulate directly.
320 * if we did a zero and that zero could have included
321 * the field in question, just silently reset it. otherwise,
324 * for now, just zero the flags field since only
325 * the readonly flag is used
332 do_warn(_("bad flags field in superblock %d\n"), i
);
334 rval
|= XR_AG_SB_SEC
;
338 * quota inodes and flags in secondary superblocks are never set by
339 * mkfs. However, they could be set in a secondary if a fs with quotas
340 * was growfs'ed since growfs copies the new primary into the
343 * Also, the in-core inode flags now have different meaning to the
344 * on-disk flags, and so libxfs_sb_to_disk cannot directly write the
345 * sb_gquotino/sb_pquotino fields without specific sb_qflags being set.
346 * Hence we need to zero those fields directly in the sb buffer here.
349 if (sb
->sb_inprogress
== 1 && sb
->sb_uquotino
!= NULLFSINO
) {
355 _("non-null user quota inode field in superblock %d\n"),
359 rval
|= XR_AG_SB_SEC
;
362 if (sb
->sb_inprogress
== 1 && sb
->sb_gquotino
!= NULLFSINO
) {
365 dsb
->sb_gquotino
= 0;
370 _("non-null group quota inode field in superblock %d\n"),
374 rval
|= XR_AG_SB_SEC
;
378 * Note that sb_pquotino is not considered a valid sb field for pre-v5
379 * superblocks. If it is anything other than 0 it is considered garbage
380 * data beyond the valid sb and explicitly zeroed above.
382 if (xfs_sb_version_has_pquotino(&mp
->m_sb
) &&
383 sb
->sb_inprogress
== 1 && sb
->sb_pquotino
!= NULLFSINO
) {
386 dsb
->sb_pquotino
= 0;
391 _("non-null project quota inode field in superblock %d\n"),
395 rval
|= XR_AG_SB_SEC
;
398 if (sb
->sb_inprogress
== 1 && sb
->sb_qflags
) {
403 do_warn(_("non-null quota flags in superblock %d\n"),
406 rval
|= XR_AG_SB_SEC
;
410 * if the secondaries agree on a stripe unit/width or inode
411 * alignment, those fields ought to be valid since they are
412 * written at mkfs time (and the corresponding sb version bits
415 if (!xfs_sb_version_hasalign(sb
) && sb
->sb_inoalignmt
!= 0) {
417 sb
->sb_inoalignmt
= 0;
421 _("bad inode alignment field in superblock %d\n"),
424 rval
|= XR_AG_SB_SEC
;
427 if (!xfs_sb_version_hasdalign(sb
) &&
428 (sb
->sb_unit
!= 0 || sb
->sb_width
!= 0)) {
430 sb
->sb_unit
= sb
->sb_width
= 0;
434 _("bad stripe unit/width fields in superblock %d\n"),
437 rval
|= XR_AG_SB_SEC
;
440 if (!xfs_sb_version_hassector(sb
) &&
441 (sb
->sb_sectsize
!= BBSIZE
|| sb
->sb_sectlog
!= BBSHIFT
||
442 sb
->sb_logsectsize
!= 0 || sb
->sb_logsectlog
!= 0)) {
444 sb
->sb_sectsize
= BBSIZE
;
445 sb
->sb_sectlog
= BBSHIFT
;
446 sb
->sb_logsectsize
= 0;
447 sb
->sb_logsectlog
= 0;
452 _("bad log/data device sector size fields in superblock %d\n"),
455 rval
|= XR_AG_SB_SEC
;
462 * verify and reset the ag header if required.
464 * lower 4 bits of rval are set depending on what got modified.
465 * (see agheader.h for more details)
467 * NOTE -- this routine does not tell the user that it has
468 * altered things. Rather, it is up to the caller to do so
469 * using the bits encoded into the return value.
473 verify_set_agheader(xfs_mount_t
*mp
, xfs_buf_t
*sbuf
, xfs_sb_t
*sb
,
474 xfs_agf_t
*agf
, xfs_agi_t
*agi
, xfs_agnumber_t i
)
478 int status_sb
= XR_OK
;
480 status
= verify_sb(sbuf
->b_addr
, sb
, (i
== 0));
482 if (status
!= XR_OK
) {
483 do_warn(_("bad on-disk superblock %d - %s\n"),
484 i
, err_string(status
));
487 status_sb
= compare_sb(mp
, sb
);
489 if (status_sb
!= XR_OK
) {
490 do_warn(_("primary/secondary superblock %d conflict - %s\n"),
491 i
, err_string(status_sb
));
494 if (status
!= XR_OK
|| status_sb
!= XR_OK
) {
499 * clear the more transient fields
501 sb
->sb_inprogress
= 1;
506 sb
->sb_frextents
= 0;
514 rval
|= secondary_sb_wack(mp
, sbuf
, sb
, i
);
516 rval
|= verify_set_agf(mp
, agf
, i
);
517 rval
|= verify_set_agi(mp
, agi
, i
);