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0b61f8a4 | 1 | // SPDX-License-Identifier: GPL-2.0 |
ff55068c DC |
2 | /* |
3 | * Copyright (c) 2000-2005 Silicon Graphics, Inc. | |
4 | * All Rights Reserved. | |
ff55068c DC |
5 | */ |
6 | #include "xfs.h" | |
7 | #include "xfs_fs.h" | |
632b89e8 | 8 | #include "xfs_shared.h" |
ff55068c | 9 | #include "xfs_format.h" |
239880ef DC |
10 | #include "xfs_log_format.h" |
11 | #include "xfs_trans_resv.h" | |
ff55068c | 12 | #include "xfs_bit.h" |
ff55068c | 13 | #include "xfs_sb.h" |
ff55068c | 14 | #include "xfs_mount.h" |
3ab78df2 | 15 | #include "xfs_defer.h" |
ff55068c | 16 | #include "xfs_inode.h" |
ff55068c DC |
17 | #include "xfs_ialloc.h" |
18 | #include "xfs_alloc.h" | |
ff55068c | 19 | #include "xfs_error.h" |
ff55068c DC |
20 | #include "xfs_trace.h" |
21 | #include "xfs_cksum.h" | |
239880ef | 22 | #include "xfs_trans.h" |
ff55068c | 23 | #include "xfs_buf_item.h" |
a4fbe6ab DC |
24 | #include "xfs_bmap_btree.h" |
25 | #include "xfs_alloc_btree.h" | |
26 | #include "xfs_ialloc_btree.h" | |
a45086e2 | 27 | #include "xfs_log.h" |
035e00ac | 28 | #include "xfs_rmap_btree.h" |
1946b91c DW |
29 | #include "xfs_bmap.h" |
30 | #include "xfs_refcount_btree.h" | |
c368ebcd DW |
31 | #include "xfs_da_format.h" |
32 | #include "xfs_da_btree.h" | |
ff55068c DC |
33 | |
34 | /* | |
35 | * Physical superblock buffer manipulations. Shared with libxfs in userspace. | |
36 | */ | |
37 | ||
ff55068c DC |
38 | /* |
39 | * Reference counting access wrappers to the perag structures. | |
40 | * Because we never free per-ag structures, the only thing we | |
41 | * have to protect against changes is the tree structure itself. | |
42 | */ | |
43 | struct xfs_perag * | |
44 | xfs_perag_get( | |
45 | struct xfs_mount *mp, | |
46 | xfs_agnumber_t agno) | |
47 | { | |
48 | struct xfs_perag *pag; | |
49 | int ref = 0; | |
50 | ||
51 | rcu_read_lock(); | |
52 | pag = radix_tree_lookup(&mp->m_perag_tree, agno); | |
53 | if (pag) { | |
54 | ASSERT(atomic_read(&pag->pag_ref) >= 0); | |
55 | ref = atomic_inc_return(&pag->pag_ref); | |
56 | } | |
57 | rcu_read_unlock(); | |
58 | trace_xfs_perag_get(mp, agno, ref, _RET_IP_); | |
59 | return pag; | |
60 | } | |
61 | ||
62 | /* | |
63 | * search from @first to find the next perag with the given tag set. | |
64 | */ | |
65 | struct xfs_perag * | |
66 | xfs_perag_get_tag( | |
67 | struct xfs_mount *mp, | |
68 | xfs_agnumber_t first, | |
69 | int tag) | |
70 | { | |
71 | struct xfs_perag *pag; | |
72 | int found; | |
73 | int ref; | |
74 | ||
75 | rcu_read_lock(); | |
76 | found = radix_tree_gang_lookup_tag(&mp->m_perag_tree, | |
77 | (void **)&pag, first, 1, tag); | |
78 | if (found <= 0) { | |
79 | rcu_read_unlock(); | |
80 | return NULL; | |
81 | } | |
82 | ref = atomic_inc_return(&pag->pag_ref); | |
83 | rcu_read_unlock(); | |
84 | trace_xfs_perag_get_tag(mp, pag->pag_agno, ref, _RET_IP_); | |
85 | return pag; | |
86 | } | |
87 | ||
88 | void | |
89 | xfs_perag_put( | |
90 | struct xfs_perag *pag) | |
91 | { | |
92 | int ref; | |
93 | ||
94 | ASSERT(atomic_read(&pag->pag_ref) > 0); | |
95 | ref = atomic_dec_return(&pag->pag_ref); | |
96 | trace_xfs_perag_put(pag->pag_mount, pag->pag_agno, ref, _RET_IP_); | |
97 | } | |
98 | ||
99 | /* | |
100 | * Check the validity of the SB found. | |
101 | */ | |
102 | STATIC int | |
103 | xfs_mount_validate_sb( | |
104 | xfs_mount_t *mp, | |
105 | xfs_sb_t *sbp, | |
106 | bool check_inprogress, | |
107 | bool check_version) | |
108 | { | |
131fa58d DW |
109 | uint32_t agcount = 0; |
110 | uint32_t rem; | |
4bb73d01 | 111 | |
ff55068c DC |
112 | if (sbp->sb_magicnum != XFS_SB_MAGIC) { |
113 | xfs_warn(mp, "bad magic number"); | |
2451337d | 114 | return -EWRONGFS; |
ff55068c DC |
115 | } |
116 | ||
117 | ||
118 | if (!xfs_sb_good_version(sbp)) { | |
119 | xfs_warn(mp, "bad version"); | |
2451337d | 120 | return -EWRONGFS; |
ff55068c DC |
121 | } |
122 | ||
123 | /* | |
124 | * Version 5 superblock feature mask validation. Reject combinations the | |
125 | * kernel cannot support up front before checking anything else. For | |
126 | * write validation, we don't need to check feature masks. | |
127 | */ | |
128 | if (check_version && XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) { | |
ff55068c DC |
129 | if (xfs_sb_has_compat_feature(sbp, |
130 | XFS_SB_FEAT_COMPAT_UNKNOWN)) { | |
131 | xfs_warn(mp, | |
f41febd2 | 132 | "Superblock has unknown compatible features (0x%x) enabled.", |
ff55068c DC |
133 | (sbp->sb_features_compat & |
134 | XFS_SB_FEAT_COMPAT_UNKNOWN)); | |
f41febd2 JP |
135 | xfs_warn(mp, |
136 | "Using a more recent kernel is recommended."); | |
ff55068c DC |
137 | } |
138 | ||
139 | if (xfs_sb_has_ro_compat_feature(sbp, | |
140 | XFS_SB_FEAT_RO_COMPAT_UNKNOWN)) { | |
141 | xfs_alert(mp, | |
142 | "Superblock has unknown read-only compatible features (0x%x) enabled.", | |
143 | (sbp->sb_features_ro_compat & | |
144 | XFS_SB_FEAT_RO_COMPAT_UNKNOWN)); | |
145 | if (!(mp->m_flags & XFS_MOUNT_RDONLY)) { | |
146 | xfs_warn(mp, | |
f41febd2 JP |
147 | "Attempted to mount read-only compatible filesystem read-write."); |
148 | xfs_warn(mp, | |
ff55068c | 149 | "Filesystem can only be safely mounted read only."); |
f41febd2 | 150 | |
2451337d | 151 | return -EINVAL; |
ff55068c DC |
152 | } |
153 | } | |
154 | if (xfs_sb_has_incompat_feature(sbp, | |
155 | XFS_SB_FEAT_INCOMPAT_UNKNOWN)) { | |
156 | xfs_warn(mp, | |
f41febd2 | 157 | "Superblock has unknown incompatible features (0x%x) enabled.", |
ff55068c DC |
158 | (sbp->sb_features_incompat & |
159 | XFS_SB_FEAT_INCOMPAT_UNKNOWN)); | |
f41febd2 JP |
160 | xfs_warn(mp, |
161 | "Filesystem can not be safely mounted by this kernel."); | |
2451337d | 162 | return -EINVAL; |
ff55068c | 163 | } |
a45086e2 BF |
164 | } else if (xfs_sb_version_hascrc(sbp)) { |
165 | /* | |
166 | * We can't read verify the sb LSN because the read verifier is | |
167 | * called before the log is allocated and processed. We know the | |
168 | * log is set up before write verifier (!check_version) calls, | |
169 | * so just check it here. | |
170 | */ | |
171 | if (!xfs_log_check_lsn(mp, sbp->sb_lsn)) | |
172 | return -EFSCORRUPTED; | |
ff55068c DC |
173 | } |
174 | ||
175 | if (xfs_sb_version_has_pquotino(sbp)) { | |
176 | if (sbp->sb_qflags & (XFS_OQUOTA_ENFD | XFS_OQUOTA_CHKD)) { | |
177 | xfs_notice(mp, | |
08e96e1a | 178 | "Version 5 of Super block has XFS_OQUOTA bits."); |
2451337d | 179 | return -EFSCORRUPTED; |
ff55068c DC |
180 | } |
181 | } else if (sbp->sb_qflags & (XFS_PQUOTA_ENFD | XFS_GQUOTA_ENFD | | |
182 | XFS_PQUOTA_CHKD | XFS_GQUOTA_CHKD)) { | |
183 | xfs_notice(mp, | |
08e96e1a | 184 | "Superblock earlier than Version 5 has XFS_[PQ]UOTA_{ENFD|CHKD} bits."); |
2451337d | 185 | return -EFSCORRUPTED; |
ff55068c DC |
186 | } |
187 | ||
e5376fc1 BF |
188 | /* |
189 | * Full inode chunks must be aligned to inode chunk size when | |
190 | * sparse inodes are enabled to support the sparse chunk | |
191 | * allocation algorithm and prevent overlapping inode records. | |
192 | */ | |
193 | if (xfs_sb_version_hassparseinodes(sbp)) { | |
194 | uint32_t align; | |
195 | ||
e5376fc1 BF |
196 | align = XFS_INODES_PER_CHUNK * sbp->sb_inodesize |
197 | >> sbp->sb_blocklog; | |
198 | if (sbp->sb_inoalignmt != align) { | |
199 | xfs_warn(mp, | |
200 | "Inode block alignment (%u) must match chunk size (%u) for sparse inodes.", | |
201 | sbp->sb_inoalignmt, align); | |
202 | return -EINVAL; | |
203 | } | |
204 | } | |
205 | ||
ff55068c DC |
206 | if (unlikely( |
207 | sbp->sb_logstart == 0 && mp->m_logdev_targp == mp->m_ddev_targp)) { | |
208 | xfs_warn(mp, | |
209 | "filesystem is marked as having an external log; " | |
210 | "specify logdev on the mount command line."); | |
2451337d | 211 | return -EINVAL; |
ff55068c DC |
212 | } |
213 | ||
214 | if (unlikely( | |
215 | sbp->sb_logstart != 0 && mp->m_logdev_targp != mp->m_ddev_targp)) { | |
216 | xfs_warn(mp, | |
217 | "filesystem is marked as having an internal log; " | |
218 | "do not specify logdev on the mount command line."); | |
2451337d | 219 | return -EINVAL; |
ff55068c DC |
220 | } |
221 | ||
4bb73d01 DW |
222 | /* Compute agcount for this number of dblocks and agblocks */ |
223 | if (sbp->sb_agblocks) { | |
224 | agcount = div_u64_rem(sbp->sb_dblocks, sbp->sb_agblocks, &rem); | |
225 | if (rem) | |
226 | agcount++; | |
227 | } | |
228 | ||
ff55068c DC |
229 | /* |
230 | * More sanity checking. Most of these were stolen directly from | |
231 | * xfs_repair. | |
232 | */ | |
233 | if (unlikely( | |
234 | sbp->sb_agcount <= 0 || | |
235 | sbp->sb_sectsize < XFS_MIN_SECTORSIZE || | |
236 | sbp->sb_sectsize > XFS_MAX_SECTORSIZE || | |
237 | sbp->sb_sectlog < XFS_MIN_SECTORSIZE_LOG || | |
238 | sbp->sb_sectlog > XFS_MAX_SECTORSIZE_LOG || | |
239 | sbp->sb_sectsize != (1 << sbp->sb_sectlog) || | |
240 | sbp->sb_blocksize < XFS_MIN_BLOCKSIZE || | |
241 | sbp->sb_blocksize > XFS_MAX_BLOCKSIZE || | |
242 | sbp->sb_blocklog < XFS_MIN_BLOCKSIZE_LOG || | |
243 | sbp->sb_blocklog > XFS_MAX_BLOCKSIZE_LOG || | |
244 | sbp->sb_blocksize != (1 << sbp->sb_blocklog) || | |
83d230eb | 245 | sbp->sb_dirblklog + sbp->sb_blocklog > XFS_MAX_BLOCKSIZE_LOG || |
ff55068c DC |
246 | sbp->sb_inodesize < XFS_DINODE_MIN_SIZE || |
247 | sbp->sb_inodesize > XFS_DINODE_MAX_SIZE || | |
248 | sbp->sb_inodelog < XFS_DINODE_MIN_LOG || | |
249 | sbp->sb_inodelog > XFS_DINODE_MAX_LOG || | |
250 | sbp->sb_inodesize != (1 << sbp->sb_inodelog) || | |
e1b05723 | 251 | sbp->sb_logsunit > XLOG_MAX_RECORD_BSIZE || |
392c6de9 | 252 | sbp->sb_inopblock != howmany(sbp->sb_blocksize,sbp->sb_inodesize) || |
4bb73d01 DW |
253 | XFS_FSB_TO_B(mp, sbp->sb_agblocks) < XFS_MIN_AG_BYTES || |
254 | XFS_FSB_TO_B(mp, sbp->sb_agblocks) > XFS_MAX_AG_BYTES || | |
255 | sbp->sb_agblklog != xfs_highbit32(sbp->sb_agblocks - 1) + 1 || | |
256 | agcount == 0 || agcount != sbp->sb_agcount || | |
ff55068c DC |
257 | (sbp->sb_blocklog - sbp->sb_inodelog != sbp->sb_inopblog) || |
258 | (sbp->sb_rextsize * sbp->sb_blocksize > XFS_MAX_RTEXTSIZE) || | |
259 | (sbp->sb_rextsize * sbp->sb_blocksize < XFS_MIN_RTEXTSIZE) || | |
260 | (sbp->sb_imax_pct > 100 /* zero sb_imax_pct is valid */) || | |
261 | sbp->sb_dblocks == 0 || | |
262 | sbp->sb_dblocks > XFS_MAX_DBLOCKS(sbp) || | |
ab3e57b5 DC |
263 | sbp->sb_dblocks < XFS_MIN_DBLOCKS(sbp) || |
264 | sbp->sb_shared_vn != 0)) { | |
5ef11eb0 | 265 | xfs_notice(mp, "SB sanity check failed"); |
2451337d | 266 | return -EFSCORRUPTED; |
bec9d48d DW |
267 | } |
268 | ||
fa4ca9c5 DC |
269 | if (sbp->sb_unit) { |
270 | if (!xfs_sb_version_hasdalign(sbp) || | |
271 | sbp->sb_unit > sbp->sb_width || | |
272 | (sbp->sb_width % sbp->sb_unit) != 0) { | |
273 | xfs_notice(mp, "SB stripe unit sanity check failed"); | |
274 | return -EFSCORRUPTED; | |
275 | } | |
276 | } else if (xfs_sb_version_hasdalign(sbp)) { | |
277 | xfs_notice(mp, "SB stripe alignment sanity check failed"); | |
278 | return -EFSCORRUPTED; | |
279 | } else if (sbp->sb_width) { | |
280 | xfs_notice(mp, "SB stripe width sanity check failed"); | |
281 | return -EFSCORRUPTED; | |
282 | } | |
283 | ||
284 | ||
bec9d48d DW |
285 | if (xfs_sb_version_hascrc(&mp->m_sb) && |
286 | sbp->sb_blocksize < XFS_MIN_CRC_BLOCKSIZE) { | |
287 | xfs_notice(mp, "v5 SB sanity check failed"); | |
288 | return -EFSCORRUPTED; | |
ff55068c DC |
289 | } |
290 | ||
291 | /* | |
292 | * Until this is fixed only page-sized or smaller data blocks work. | |
293 | */ | |
294 | if (unlikely(sbp->sb_blocksize > PAGE_SIZE)) { | |
295 | xfs_warn(mp, | |
296 | "File system with blocksize %d bytes. " | |
297 | "Only pagesize (%ld) or less will currently work.", | |
298 | sbp->sb_blocksize, PAGE_SIZE); | |
2451337d | 299 | return -ENOSYS; |
ff55068c DC |
300 | } |
301 | ||
302 | /* | |
303 | * Currently only very few inode sizes are supported. | |
304 | */ | |
305 | switch (sbp->sb_inodesize) { | |
306 | case 256: | |
307 | case 512: | |
308 | case 1024: | |
309 | case 2048: | |
310 | break; | |
311 | default: | |
312 | xfs_warn(mp, "inode size of %d bytes not supported", | |
313 | sbp->sb_inodesize); | |
2451337d | 314 | return -ENOSYS; |
ff55068c DC |
315 | } |
316 | ||
317 | if (xfs_sb_validate_fsb_count(sbp, sbp->sb_dblocks) || | |
318 | xfs_sb_validate_fsb_count(sbp, sbp->sb_rblocks)) { | |
319 | xfs_warn(mp, | |
320 | "file system too large to be mounted on this system."); | |
2451337d | 321 | return -EFBIG; |
ff55068c DC |
322 | } |
323 | ||
324 | if (check_inprogress && sbp->sb_inprogress) { | |
325 | xfs_warn(mp, "Offline file system operation in progress!"); | |
2451337d | 326 | return -EFSCORRUPTED; |
ff55068c | 327 | } |
ff55068c DC |
328 | return 0; |
329 | } | |
330 | ||
331 | void | |
332 | xfs_sb_quota_from_disk(struct xfs_sb *sbp) | |
333 | { | |
334 | /* | |
335 | * older mkfs doesn't initialize quota inodes to NULLFSINO. This | |
336 | * leads to in-core values having two different values for a quota | |
337 | * inode to be invalid: 0 and NULLFSINO. Change it to a single value | |
338 | * NULLFSINO. | |
339 | * | |
340 | * Note that this change affect only the in-core values. These | |
341 | * values are not written back to disk unless any quota information | |
342 | * is written to the disk. Even in that case, sb_pquotino field is | |
343 | * not written to disk unless the superblock supports pquotino. | |
344 | */ | |
345 | if (sbp->sb_uquotino == 0) | |
346 | sbp->sb_uquotino = NULLFSINO; | |
347 | if (sbp->sb_gquotino == 0) | |
348 | sbp->sb_gquotino = NULLFSINO; | |
349 | if (sbp->sb_pquotino == 0) | |
350 | sbp->sb_pquotino = NULLFSINO; | |
351 | ||
352 | /* | |
353 | * We need to do these manipilations only if we are working | |
354 | * with an older version of on-disk superblock. | |
355 | */ | |
356 | if (xfs_sb_version_has_pquotino(sbp)) | |
357 | return; | |
358 | ||
359 | if (sbp->sb_qflags & XFS_OQUOTA_ENFD) | |
360 | sbp->sb_qflags |= (sbp->sb_qflags & XFS_PQUOTA_ACCT) ? | |
361 | XFS_PQUOTA_ENFD : XFS_GQUOTA_ENFD; | |
362 | if (sbp->sb_qflags & XFS_OQUOTA_CHKD) | |
363 | sbp->sb_qflags |= (sbp->sb_qflags & XFS_PQUOTA_ACCT) ? | |
364 | XFS_PQUOTA_CHKD : XFS_GQUOTA_CHKD; | |
365 | sbp->sb_qflags &= ~(XFS_OQUOTA_ENFD | XFS_OQUOTA_CHKD); | |
366 | ||
e6fc6fcf ES |
367 | if (sbp->sb_qflags & XFS_PQUOTA_ACCT && |
368 | sbp->sb_gquotino != NULLFSINO) { | |
ff55068c DC |
369 | /* |
370 | * In older version of superblock, on-disk superblock only | |
371 | * has sb_gquotino, and in-core superblock has both sb_gquotino | |
372 | * and sb_pquotino. But, only one of them is supported at any | |
373 | * point of time. So, if PQUOTA is set in disk superblock, | |
e6fc6fcf ES |
374 | * copy over sb_gquotino to sb_pquotino. The NULLFSINO test |
375 | * above is to make sure we don't do this twice and wipe them | |
376 | * both out! | |
ff55068c DC |
377 | */ |
378 | sbp->sb_pquotino = sbp->sb_gquotino; | |
379 | sbp->sb_gquotino = NULLFSINO; | |
380 | } | |
381 | } | |
382 | ||
5ef828c4 ES |
383 | static void |
384 | __xfs_sb_from_disk( | |
ff55068c | 385 | struct xfs_sb *to, |
5ef828c4 ES |
386 | xfs_dsb_t *from, |
387 | bool convert_xquota) | |
ff55068c DC |
388 | { |
389 | to->sb_magicnum = be32_to_cpu(from->sb_magicnum); | |
390 | to->sb_blocksize = be32_to_cpu(from->sb_blocksize); | |
391 | to->sb_dblocks = be64_to_cpu(from->sb_dblocks); | |
392 | to->sb_rblocks = be64_to_cpu(from->sb_rblocks); | |
393 | to->sb_rextents = be64_to_cpu(from->sb_rextents); | |
394 | memcpy(&to->sb_uuid, &from->sb_uuid, sizeof(to->sb_uuid)); | |
395 | to->sb_logstart = be64_to_cpu(from->sb_logstart); | |
396 | to->sb_rootino = be64_to_cpu(from->sb_rootino); | |
397 | to->sb_rbmino = be64_to_cpu(from->sb_rbmino); | |
398 | to->sb_rsumino = be64_to_cpu(from->sb_rsumino); | |
399 | to->sb_rextsize = be32_to_cpu(from->sb_rextsize); | |
400 | to->sb_agblocks = be32_to_cpu(from->sb_agblocks); | |
401 | to->sb_agcount = be32_to_cpu(from->sb_agcount); | |
402 | to->sb_rbmblocks = be32_to_cpu(from->sb_rbmblocks); | |
403 | to->sb_logblocks = be32_to_cpu(from->sb_logblocks); | |
404 | to->sb_versionnum = be16_to_cpu(from->sb_versionnum); | |
405 | to->sb_sectsize = be16_to_cpu(from->sb_sectsize); | |
406 | to->sb_inodesize = be16_to_cpu(from->sb_inodesize); | |
407 | to->sb_inopblock = be16_to_cpu(from->sb_inopblock); | |
408 | memcpy(&to->sb_fname, &from->sb_fname, sizeof(to->sb_fname)); | |
409 | to->sb_blocklog = from->sb_blocklog; | |
410 | to->sb_sectlog = from->sb_sectlog; | |
411 | to->sb_inodelog = from->sb_inodelog; | |
412 | to->sb_inopblog = from->sb_inopblog; | |
413 | to->sb_agblklog = from->sb_agblklog; | |
414 | to->sb_rextslog = from->sb_rextslog; | |
415 | to->sb_inprogress = from->sb_inprogress; | |
416 | to->sb_imax_pct = from->sb_imax_pct; | |
417 | to->sb_icount = be64_to_cpu(from->sb_icount); | |
418 | to->sb_ifree = be64_to_cpu(from->sb_ifree); | |
419 | to->sb_fdblocks = be64_to_cpu(from->sb_fdblocks); | |
420 | to->sb_frextents = be64_to_cpu(from->sb_frextents); | |
421 | to->sb_uquotino = be64_to_cpu(from->sb_uquotino); | |
422 | to->sb_gquotino = be64_to_cpu(from->sb_gquotino); | |
423 | to->sb_qflags = be16_to_cpu(from->sb_qflags); | |
424 | to->sb_flags = from->sb_flags; | |
425 | to->sb_shared_vn = from->sb_shared_vn; | |
426 | to->sb_inoalignmt = be32_to_cpu(from->sb_inoalignmt); | |
427 | to->sb_unit = be32_to_cpu(from->sb_unit); | |
428 | to->sb_width = be32_to_cpu(from->sb_width); | |
429 | to->sb_dirblklog = from->sb_dirblklog; | |
430 | to->sb_logsectlog = from->sb_logsectlog; | |
431 | to->sb_logsectsize = be16_to_cpu(from->sb_logsectsize); | |
432 | to->sb_logsunit = be32_to_cpu(from->sb_logsunit); | |
433 | to->sb_features2 = be32_to_cpu(from->sb_features2); | |
434 | to->sb_bad_features2 = be32_to_cpu(from->sb_bad_features2); | |
435 | to->sb_features_compat = be32_to_cpu(from->sb_features_compat); | |
436 | to->sb_features_ro_compat = be32_to_cpu(from->sb_features_ro_compat); | |
437 | to->sb_features_incompat = be32_to_cpu(from->sb_features_incompat); | |
438 | to->sb_features_log_incompat = | |
439 | be32_to_cpu(from->sb_features_log_incompat); | |
04dd1a0d ES |
440 | /* crc is only used on disk, not in memory; just init to 0 here. */ |
441 | to->sb_crc = 0; | |
fb4f2b4e | 442 | to->sb_spino_align = be32_to_cpu(from->sb_spino_align); |
ff55068c DC |
443 | to->sb_pquotino = be64_to_cpu(from->sb_pquotino); |
444 | to->sb_lsn = be64_to_cpu(from->sb_lsn); | |
ce748eaa ES |
445 | /* |
446 | * sb_meta_uuid is only on disk if it differs from sb_uuid and the | |
447 | * feature flag is set; if not set we keep it only in memory. | |
448 | */ | |
449 | if (xfs_sb_version_hasmetauuid(to)) | |
450 | uuid_copy(&to->sb_meta_uuid, &from->sb_meta_uuid); | |
451 | else | |
452 | uuid_copy(&to->sb_meta_uuid, &from->sb_uuid); | |
5ef828c4 ES |
453 | /* Convert on-disk flags to in-memory flags? */ |
454 | if (convert_xquota) | |
455 | xfs_sb_quota_from_disk(to); | |
456 | } | |
457 | ||
458 | void | |
459 | xfs_sb_from_disk( | |
460 | struct xfs_sb *to, | |
461 | xfs_dsb_t *from) | |
462 | { | |
463 | __xfs_sb_from_disk(to, from, true); | |
ff55068c DC |
464 | } |
465 | ||
4d11a402 | 466 | static void |
ff55068c | 467 | xfs_sb_quota_to_disk( |
4d11a402 DC |
468 | struct xfs_dsb *to, |
469 | struct xfs_sb *from) | |
ff55068c | 470 | { |
c8ce540d | 471 | uint16_t qflags = from->sb_qflags; |
ff55068c | 472 | |
4d11a402 DC |
473 | to->sb_uquotino = cpu_to_be64(from->sb_uquotino); |
474 | if (xfs_sb_version_has_pquotino(from)) { | |
475 | to->sb_qflags = cpu_to_be16(from->sb_qflags); | |
476 | to->sb_gquotino = cpu_to_be64(from->sb_gquotino); | |
477 | to->sb_pquotino = cpu_to_be64(from->sb_pquotino); | |
478 | return; | |
479 | } | |
480 | ||
ff55068c | 481 | /* |
4d11a402 DC |
482 | * The in-core version of sb_qflags do not have XFS_OQUOTA_* |
483 | * flags, whereas the on-disk version does. So, convert incore | |
484 | * XFS_{PG}QUOTA_* flags to on-disk XFS_OQUOTA_* flags. | |
ff55068c | 485 | */ |
4d11a402 DC |
486 | qflags &= ~(XFS_PQUOTA_ENFD | XFS_PQUOTA_CHKD | |
487 | XFS_GQUOTA_ENFD | XFS_GQUOTA_CHKD); | |
ff55068c | 488 | |
4d11a402 DC |
489 | if (from->sb_qflags & |
490 | (XFS_PQUOTA_ENFD | XFS_GQUOTA_ENFD)) | |
491 | qflags |= XFS_OQUOTA_ENFD; | |
492 | if (from->sb_qflags & | |
493 | (XFS_PQUOTA_CHKD | XFS_GQUOTA_CHKD)) | |
494 | qflags |= XFS_OQUOTA_CHKD; | |
495 | to->sb_qflags = cpu_to_be16(qflags); | |
ff55068c DC |
496 | |
497 | /* | |
4d11a402 DC |
498 | * GQUOTINO and PQUOTINO cannot be used together in versions |
499 | * of superblock that do not have pquotino. from->sb_flags | |
500 | * tells us which quota is active and should be copied to | |
501 | * disk. If neither are active, we should NULL the inode. | |
03e01349 | 502 | * |
4d11a402 DC |
503 | * In all cases, the separate pquotino must remain 0 because it |
504 | * it beyond the "end" of the valid non-pquotino superblock. | |
ff55068c | 505 | */ |
4d11a402 | 506 | if (from->sb_qflags & XFS_GQUOTA_ACCT) |
ff55068c | 507 | to->sb_gquotino = cpu_to_be64(from->sb_gquotino); |
4d11a402 | 508 | else if (from->sb_qflags & XFS_PQUOTA_ACCT) |
ff55068c | 509 | to->sb_gquotino = cpu_to_be64(from->sb_pquotino); |
03e01349 DC |
510 | else { |
511 | /* | |
512 | * We can't rely on just the fields being logged to tell us | |
513 | * that it is safe to write NULLFSINO - we should only do that | |
514 | * if quotas are not actually enabled. Hence only write | |
515 | * NULLFSINO if both in-core quota inodes are NULL. | |
516 | */ | |
517 | if (from->sb_gquotino == NULLFSINO && | |
518 | from->sb_pquotino == NULLFSINO) | |
519 | to->sb_gquotino = cpu_to_be64(NULLFSINO); | |
520 | } | |
ff55068c | 521 | |
4d11a402 | 522 | to->sb_pquotino = 0; |
ff55068c DC |
523 | } |
524 | ||
ff55068c DC |
525 | void |
526 | xfs_sb_to_disk( | |
4d11a402 DC |
527 | struct xfs_dsb *to, |
528 | struct xfs_sb *from) | |
ff55068c | 529 | { |
4d11a402 DC |
530 | xfs_sb_quota_to_disk(to, from); |
531 | ||
532 | to->sb_magicnum = cpu_to_be32(from->sb_magicnum); | |
533 | to->sb_blocksize = cpu_to_be32(from->sb_blocksize); | |
534 | to->sb_dblocks = cpu_to_be64(from->sb_dblocks); | |
535 | to->sb_rblocks = cpu_to_be64(from->sb_rblocks); | |
536 | to->sb_rextents = cpu_to_be64(from->sb_rextents); | |
537 | memcpy(&to->sb_uuid, &from->sb_uuid, sizeof(to->sb_uuid)); | |
538 | to->sb_logstart = cpu_to_be64(from->sb_logstart); | |
539 | to->sb_rootino = cpu_to_be64(from->sb_rootino); | |
540 | to->sb_rbmino = cpu_to_be64(from->sb_rbmino); | |
541 | to->sb_rsumino = cpu_to_be64(from->sb_rsumino); | |
542 | to->sb_rextsize = cpu_to_be32(from->sb_rextsize); | |
543 | to->sb_agblocks = cpu_to_be32(from->sb_agblocks); | |
544 | to->sb_agcount = cpu_to_be32(from->sb_agcount); | |
545 | to->sb_rbmblocks = cpu_to_be32(from->sb_rbmblocks); | |
546 | to->sb_logblocks = cpu_to_be32(from->sb_logblocks); | |
547 | to->sb_versionnum = cpu_to_be16(from->sb_versionnum); | |
548 | to->sb_sectsize = cpu_to_be16(from->sb_sectsize); | |
549 | to->sb_inodesize = cpu_to_be16(from->sb_inodesize); | |
550 | to->sb_inopblock = cpu_to_be16(from->sb_inopblock); | |
551 | memcpy(&to->sb_fname, &from->sb_fname, sizeof(to->sb_fname)); | |
552 | to->sb_blocklog = from->sb_blocklog; | |
553 | to->sb_sectlog = from->sb_sectlog; | |
554 | to->sb_inodelog = from->sb_inodelog; | |
555 | to->sb_inopblog = from->sb_inopblog; | |
556 | to->sb_agblklog = from->sb_agblklog; | |
557 | to->sb_rextslog = from->sb_rextslog; | |
558 | to->sb_inprogress = from->sb_inprogress; | |
559 | to->sb_imax_pct = from->sb_imax_pct; | |
560 | to->sb_icount = cpu_to_be64(from->sb_icount); | |
561 | to->sb_ifree = cpu_to_be64(from->sb_ifree); | |
562 | to->sb_fdblocks = cpu_to_be64(from->sb_fdblocks); | |
563 | to->sb_frextents = cpu_to_be64(from->sb_frextents); | |
ff55068c | 564 | |
4d11a402 DC |
565 | to->sb_flags = from->sb_flags; |
566 | to->sb_shared_vn = from->sb_shared_vn; | |
567 | to->sb_inoalignmt = cpu_to_be32(from->sb_inoalignmt); | |
568 | to->sb_unit = cpu_to_be32(from->sb_unit); | |
569 | to->sb_width = cpu_to_be32(from->sb_width); | |
570 | to->sb_dirblklog = from->sb_dirblklog; | |
571 | to->sb_logsectlog = from->sb_logsectlog; | |
572 | to->sb_logsectsize = cpu_to_be16(from->sb_logsectsize); | |
573 | to->sb_logsunit = cpu_to_be32(from->sb_logsunit); | |
074e427b DC |
574 | |
575 | /* | |
576 | * We need to ensure that bad_features2 always matches features2. | |
577 | * Hence we enforce that here rather than having to remember to do it | |
578 | * everywhere else that updates features2. | |
579 | */ | |
580 | from->sb_bad_features2 = from->sb_features2; | |
4d11a402 DC |
581 | to->sb_features2 = cpu_to_be32(from->sb_features2); |
582 | to->sb_bad_features2 = cpu_to_be32(from->sb_bad_features2); | |
583 | ||
584 | if (xfs_sb_version_hascrc(from)) { | |
585 | to->sb_features_compat = cpu_to_be32(from->sb_features_compat); | |
586 | to->sb_features_ro_compat = | |
587 | cpu_to_be32(from->sb_features_ro_compat); | |
588 | to->sb_features_incompat = | |
589 | cpu_to_be32(from->sb_features_incompat); | |
590 | to->sb_features_log_incompat = | |
591 | cpu_to_be32(from->sb_features_log_incompat); | |
fb4f2b4e | 592 | to->sb_spino_align = cpu_to_be32(from->sb_spino_align); |
4d11a402 | 593 | to->sb_lsn = cpu_to_be64(from->sb_lsn); |
ce748eaa ES |
594 | if (xfs_sb_version_hasmetauuid(from)) |
595 | uuid_copy(&to->sb_meta_uuid, &from->sb_meta_uuid); | |
ff55068c DC |
596 | } |
597 | } | |
598 | ||
599 | static int | |
600 | xfs_sb_verify( | |
601 | struct xfs_buf *bp, | |
602 | bool check_version) | |
603 | { | |
604 | struct xfs_mount *mp = bp->b_target->bt_mount; | |
605 | struct xfs_sb sb; | |
606 | ||
5ef828c4 ES |
607 | /* |
608 | * Use call variant which doesn't convert quota flags from disk | |
609 | * format, because xfs_mount_validate_sb checks the on-disk flags. | |
610 | */ | |
611 | __xfs_sb_from_disk(&sb, XFS_BUF_TO_SBP(bp), false); | |
ff55068c DC |
612 | |
613 | /* | |
614 | * Only check the in progress field for the primary superblock as | |
615 | * mkfs.xfs doesn't clear it from secondary superblocks. | |
616 | */ | |
f3d7ebde DC |
617 | return xfs_mount_validate_sb(mp, &sb, |
618 | bp->b_maps[0].bm_bn == XFS_SB_DADDR, | |
ff55068c DC |
619 | check_version); |
620 | } | |
621 | ||
622 | /* | |
623 | * If the superblock has the CRC feature bit set or the CRC field is non-null, | |
624 | * check that the CRC is valid. We check the CRC field is non-null because a | |
625 | * single bit error could clear the feature bit and unused parts of the | |
626 | * superblock are supposed to be zero. Hence a non-null crc field indicates that | |
627 | * we've potentially lost a feature bit and we should check it anyway. | |
10e6e65d ES |
628 | * |
629 | * However, past bugs (i.e. in growfs) left non-zeroed regions beyond the | |
630 | * last field in V4 secondary superblocks. So for secondary superblocks, | |
631 | * we are more forgiving, and ignore CRC failures if the primary doesn't | |
632 | * indicate that the fs version is V5. | |
ff55068c DC |
633 | */ |
634 | static void | |
635 | xfs_sb_read_verify( | |
636 | struct xfs_buf *bp) | |
637 | { | |
638 | struct xfs_mount *mp = bp->b_target->bt_mount; | |
639 | struct xfs_dsb *dsb = XFS_BUF_TO_SBP(bp); | |
640 | int error; | |
641 | ||
642 | /* | |
643 | * open code the version check to avoid needing to convert the entire | |
644 | * superblock from disk order just to check the version number | |
645 | */ | |
646 | if (dsb->sb_magicnum == cpu_to_be32(XFS_SB_MAGIC) && | |
647 | (((be16_to_cpu(dsb->sb_versionnum) & XFS_SB_VERSION_NUMBITS) == | |
648 | XFS_SB_VERSION_5) || | |
649 | dsb->sb_crc != 0)) { | |
650 | ||
51582170 | 651 | if (!xfs_buf_verify_cksum(bp, XFS_SB_CRC_OFF)) { |
10e6e65d | 652 | /* Only fail bad secondaries on a known V5 filesystem */ |
7a01e707 | 653 | if (bp->b_bn == XFS_SB_DADDR || |
10e6e65d | 654 | xfs_sb_version_hascrc(&mp->m_sb)) { |
2451337d | 655 | error = -EFSBADCRC; |
10e6e65d ES |
656 | goto out_error; |
657 | } | |
ff55068c DC |
658 | } |
659 | } | |
660 | error = xfs_sb_verify(bp, true); | |
661 | ||
662 | out_error: | |
31ca03c9 | 663 | if (error == -EFSCORRUPTED || error == -EFSBADCRC) |
bc1a09b8 | 664 | xfs_verifier_error(bp, error, __this_address); |
31ca03c9 | 665 | else if (error) |
ff55068c | 666 | xfs_buf_ioerror(bp, error); |
ff55068c DC |
667 | } |
668 | ||
669 | /* | |
670 | * We may be probed for a filesystem match, so we may not want to emit | |
671 | * messages when the superblock buffer is not actually an XFS superblock. | |
2533787a | 672 | * If we find an XFS superblock, then run a normal, noisy mount because we are |
ff55068c DC |
673 | * really going to mount it and want to know about errors. |
674 | */ | |
675 | static void | |
676 | xfs_sb_quiet_read_verify( | |
677 | struct xfs_buf *bp) | |
678 | { | |
679 | struct xfs_dsb *dsb = XFS_BUF_TO_SBP(bp); | |
680 | ||
ff55068c DC |
681 | if (dsb->sb_magicnum == cpu_to_be32(XFS_SB_MAGIC)) { |
682 | /* XFS filesystem, verify noisily! */ | |
683 | xfs_sb_read_verify(bp); | |
684 | return; | |
685 | } | |
686 | /* quietly fail */ | |
2451337d | 687 | xfs_buf_ioerror(bp, -EWRONGFS); |
ff55068c DC |
688 | } |
689 | ||
690 | static void | |
691 | xfs_sb_write_verify( | |
692 | struct xfs_buf *bp) | |
693 | { | |
694 | struct xfs_mount *mp = bp->b_target->bt_mount; | |
fb1755a6 | 695 | struct xfs_buf_log_item *bip = bp->b_log_item; |
ff55068c DC |
696 | int error; |
697 | ||
698 | error = xfs_sb_verify(bp, false); | |
699 | if (error) { | |
bc1a09b8 | 700 | xfs_verifier_error(bp, error, __this_address); |
ff55068c DC |
701 | return; |
702 | } | |
703 | ||
704 | if (!xfs_sb_version_hascrc(&mp->m_sb)) | |
705 | return; | |
706 | ||
707 | if (bip) | |
708 | XFS_BUF_TO_SBP(bp)->sb_lsn = cpu_to_be64(bip->bli_item.li_lsn); | |
709 | ||
f1dbcd7e | 710 | xfs_buf_update_cksum(bp, XFS_SB_CRC_OFF); |
ff55068c DC |
711 | } |
712 | ||
713 | const struct xfs_buf_ops xfs_sb_buf_ops = { | |
233135b7 | 714 | .name = "xfs_sb", |
ff55068c DC |
715 | .verify_read = xfs_sb_read_verify, |
716 | .verify_write = xfs_sb_write_verify, | |
717 | }; | |
718 | ||
719 | const struct xfs_buf_ops xfs_sb_quiet_buf_ops = { | |
233135b7 | 720 | .name = "xfs_sb_quiet", |
ff55068c DC |
721 | .verify_read = xfs_sb_quiet_read_verify, |
722 | .verify_write = xfs_sb_write_verify, | |
723 | }; | |
724 | ||
725 | /* | |
726 | * xfs_mount_common | |
727 | * | |
728 | * Mount initialization code establishing various mount | |
729 | * fields from the superblock associated with the given | |
730 | * mount structure | |
731 | */ | |
732 | void | |
733 | xfs_sb_mount_common( | |
734 | struct xfs_mount *mp, | |
735 | struct xfs_sb *sbp) | |
736 | { | |
737 | mp->m_agfrotor = mp->m_agirotor = 0; | |
ff55068c DC |
738 | mp->m_maxagi = mp->m_sb.sb_agcount; |
739 | mp->m_blkbit_log = sbp->sb_blocklog + XFS_NBBYLOG; | |
740 | mp->m_blkbb_log = sbp->sb_blocklog - BBSHIFT; | |
741 | mp->m_sectbb_log = sbp->sb_sectlog - BBSHIFT; | |
742 | mp->m_agno_log = xfs_highbit32(sbp->sb_agcount - 1) + 1; | |
743 | mp->m_agino_log = sbp->sb_inopblog + sbp->sb_agblklog; | |
744 | mp->m_blockmask = sbp->sb_blocksize - 1; | |
745 | mp->m_blockwsize = sbp->sb_blocksize >> XFS_WORDLOG; | |
746 | mp->m_blockwmask = mp->m_blockwsize - 1; | |
747 | ||
748 | mp->m_alloc_mxr[0] = xfs_allocbt_maxrecs(mp, sbp->sb_blocksize, 1); | |
749 | mp->m_alloc_mxr[1] = xfs_allocbt_maxrecs(mp, sbp->sb_blocksize, 0); | |
750 | mp->m_alloc_mnr[0] = mp->m_alloc_mxr[0] / 2; | |
751 | mp->m_alloc_mnr[1] = mp->m_alloc_mxr[1] / 2; | |
752 | ||
753 | mp->m_inobt_mxr[0] = xfs_inobt_maxrecs(mp, sbp->sb_blocksize, 1); | |
754 | mp->m_inobt_mxr[1] = xfs_inobt_maxrecs(mp, sbp->sb_blocksize, 0); | |
755 | mp->m_inobt_mnr[0] = mp->m_inobt_mxr[0] / 2; | |
756 | mp->m_inobt_mnr[1] = mp->m_inobt_mxr[1] / 2; | |
757 | ||
758 | mp->m_bmap_dmxr[0] = xfs_bmbt_maxrecs(mp, sbp->sb_blocksize, 1); | |
759 | mp->m_bmap_dmxr[1] = xfs_bmbt_maxrecs(mp, sbp->sb_blocksize, 0); | |
760 | mp->m_bmap_dmnr[0] = mp->m_bmap_dmxr[0] / 2; | |
761 | mp->m_bmap_dmnr[1] = mp->m_bmap_dmxr[1] / 2; | |
762 | ||
a1f69417 ES |
763 | mp->m_rmap_mxr[0] = xfs_rmapbt_maxrecs(sbp->sb_blocksize, 1); |
764 | mp->m_rmap_mxr[1] = xfs_rmapbt_maxrecs(sbp->sb_blocksize, 0); | |
035e00ac DW |
765 | mp->m_rmap_mnr[0] = mp->m_rmap_mxr[0] / 2; |
766 | mp->m_rmap_mnr[1] = mp->m_rmap_mxr[1] / 2; | |
767 | ||
a1f69417 ES |
768 | mp->m_refc_mxr[0] = xfs_refcountbt_maxrecs(sbp->sb_blocksize, true); |
769 | mp->m_refc_mxr[1] = xfs_refcountbt_maxrecs(sbp->sb_blocksize, false); | |
1946b91c DW |
770 | mp->m_refc_mnr[0] = mp->m_refc_mxr[0] / 2; |
771 | mp->m_refc_mnr[1] = mp->m_refc_mxr[1] / 2; | |
772 | ||
ff55068c | 773 | mp->m_bsize = XFS_FSB_TO_BB(mp, 1); |
c8ce540d | 774 | mp->m_ialloc_inos = (int)MAX((uint16_t)XFS_INODES_PER_CHUNK, |
ff55068c DC |
775 | sbp->sb_inopblock); |
776 | mp->m_ialloc_blks = mp->m_ialloc_inos >> sbp->sb_inopblog; | |
066a1884 BF |
777 | |
778 | if (sbp->sb_spino_align) | |
779 | mp->m_ialloc_min_blks = sbp->sb_spino_align; | |
780 | else | |
781 | mp->m_ialloc_min_blks = mp->m_ialloc_blks; | |
52548852 DW |
782 | mp->m_alloc_set_aside = xfs_alloc_set_aside(mp); |
783 | mp->m_ag_max_usable = xfs_alloc_ag_max_usable(mp); | |
ff55068c DC |
784 | } |
785 | ||
786 | /* | |
787 | * xfs_initialize_perag_data | |
788 | * | |
789 | * Read in each per-ag structure so we can count up the number of | |
790 | * allocated inodes, free inodes and used filesystem blocks as this | |
791 | * information is no longer persistent in the superblock. Once we have | |
792 | * this information, write it into the in-core superblock structure. | |
793 | */ | |
794 | int | |
795 | xfs_initialize_perag_data( | |
796 | struct xfs_mount *mp, | |
797 | xfs_agnumber_t agcount) | |
798 | { | |
799 | xfs_agnumber_t index; | |
800 | xfs_perag_t *pag; | |
801 | xfs_sb_t *sbp = &mp->m_sb; | |
802 | uint64_t ifree = 0; | |
803 | uint64_t ialloc = 0; | |
804 | uint64_t bfree = 0; | |
805 | uint64_t bfreelst = 0; | |
806 | uint64_t btree = 0; | |
807 | int error; | |
808 | ||
809 | for (index = 0; index < agcount; index++) { | |
810 | /* | |
811 | * read the agf, then the agi. This gets us | |
812 | * all the information we need and populates the | |
813 | * per-ag structures for us. | |
814 | */ | |
815 | error = xfs_alloc_pagf_init(mp, NULL, index, 0); | |
816 | if (error) | |
817 | return error; | |
818 | ||
819 | error = xfs_ialloc_pagi_init(mp, NULL, index); | |
820 | if (error) | |
821 | return error; | |
822 | pag = xfs_perag_get(mp, index); | |
823 | ifree += pag->pagi_freecount; | |
824 | ialloc += pag->pagi_count; | |
825 | bfree += pag->pagf_freeblks; | |
826 | bfreelst += pag->pagf_flcount; | |
827 | btree += pag->pagf_btreeblks; | |
828 | xfs_perag_put(pag); | |
829 | } | |
5681ca40 DC |
830 | |
831 | /* Overwrite incore superblock counters with just-read data */ | |
ff55068c DC |
832 | spin_lock(&mp->m_sb_lock); |
833 | sbp->sb_ifree = ifree; | |
834 | sbp->sb_icount = ialloc; | |
835 | sbp->sb_fdblocks = bfree + bfreelst + btree; | |
836 | spin_unlock(&mp->m_sb_lock); | |
837 | ||
5681ca40 | 838 | xfs_reinit_percpu_counters(mp); |
ff55068c DC |
839 | |
840 | return 0; | |
841 | } | |
842 | ||
843 | /* | |
61e63ecb DC |
844 | * xfs_log_sb() can be used to copy arbitrary changes to the in-core superblock |
845 | * into the superblock buffer to be logged. It does not provide the higher | |
846 | * level of locking that is needed to protect the in-core superblock from | |
847 | * concurrent access. | |
ff55068c DC |
848 | */ |
849 | void | |
61e63ecb | 850 | xfs_log_sb( |
4d11a402 | 851 | struct xfs_trans *tp) |
ff55068c | 852 | { |
4d11a402 DC |
853 | struct xfs_mount *mp = tp->t_mountp; |
854 | struct xfs_buf *bp = xfs_trans_getsb(tp, mp, 0); | |
ff55068c | 855 | |
501ab323 | 856 | mp->m_sb.sb_icount = percpu_counter_sum(&mp->m_icount); |
e88b64ea | 857 | mp->m_sb.sb_ifree = percpu_counter_sum(&mp->m_ifree); |
0d485ada | 858 | mp->m_sb.sb_fdblocks = percpu_counter_sum(&mp->m_fdblocks); |
501ab323 | 859 | |
4d11a402 | 860 | xfs_sb_to_disk(XFS_BUF_TO_SBP(bp), &mp->m_sb); |
ff55068c | 861 | xfs_trans_buf_set_type(tp, bp, XFS_BLFT_SB_BUF); |
4d11a402 | 862 | xfs_trans_log_buf(tp, bp, 0, sizeof(struct xfs_dsb)); |
ff55068c | 863 | } |
61e63ecb DC |
864 | |
865 | /* | |
866 | * xfs_sync_sb | |
867 | * | |
868 | * Sync the superblock to disk. | |
869 | * | |
870 | * Note that the caller is responsible for checking the frozen state of the | |
871 | * filesystem. This procedure uses the non-blocking transaction allocator and | |
872 | * thus will allow modifications to a frozen fs. This is required because this | |
873 | * code can be called during the process of freezing where use of the high-level | |
874 | * allocator would deadlock. | |
875 | */ | |
876 | int | |
877 | xfs_sync_sb( | |
878 | struct xfs_mount *mp, | |
879 | bool wait) | |
880 | { | |
881 | struct xfs_trans *tp; | |
882 | int error; | |
883 | ||
253f4911 CH |
884 | error = xfs_trans_alloc(mp, &M_RES(mp)->tr_sb, 0, 0, |
885 | XFS_TRANS_NO_WRITECOUNT, &tp); | |
886 | if (error) | |
61e63ecb | 887 | return error; |
61e63ecb DC |
888 | |
889 | xfs_log_sb(tp); | |
890 | if (wait) | |
891 | xfs_trans_set_sync(tp); | |
70393313 | 892 | return xfs_trans_commit(tp); |
61e63ecb | 893 | } |
c368ebcd | 894 | |
b16817b6 DC |
895 | /* |
896 | * Update all the secondary superblocks to match the new state of the primary. | |
897 | * Because we are completely overwriting all the existing fields in the | |
898 | * secondary superblock buffers, there is no need to read them in from disk. | |
899 | * Just get a new buffer, stamp it and write it. | |
900 | * | |
901 | * The sb buffers need to be cached here so that we serialise against other | |
902 | * operations that access the secondary superblocks, but we don't want to keep | |
903 | * them in memory once it is written so we mark it as a one-shot buffer. | |
904 | */ | |
905 | int | |
906 | xfs_update_secondary_sbs( | |
907 | struct xfs_mount *mp) | |
908 | { | |
909 | xfs_agnumber_t agno; | |
910 | int saved_error = 0; | |
911 | int error = 0; | |
912 | LIST_HEAD (buffer_list); | |
913 | ||
914 | /* update secondary superblocks. */ | |
915 | for (agno = 1; agno < mp->m_sb.sb_agcount; agno++) { | |
916 | struct xfs_buf *bp; | |
917 | ||
918 | bp = xfs_buf_get(mp->m_ddev_targp, | |
919 | XFS_AG_DADDR(mp, agno, XFS_SB_DADDR), | |
920 | XFS_FSS_TO_BB(mp, 1), 0); | |
921 | /* | |
922 | * If we get an error reading or writing alternate superblocks, | |
923 | * continue. xfs_repair chooses the "best" superblock based | |
924 | * on most matches; if we break early, we'll leave more | |
925 | * superblocks un-updated than updated, and xfs_repair may | |
926 | * pick them over the properly-updated primary. | |
927 | */ | |
928 | if (!bp) { | |
929 | xfs_warn(mp, | |
930 | "error allocating secondary superblock for ag %d", | |
931 | agno); | |
932 | if (!saved_error) | |
933 | saved_error = -ENOMEM; | |
934 | continue; | |
935 | } | |
936 | ||
937 | bp->b_ops = &xfs_sb_buf_ops; | |
938 | xfs_buf_oneshot(bp); | |
939 | xfs_buf_zero(bp, 0, BBTOB(bp->b_length)); | |
940 | xfs_sb_to_disk(XFS_BUF_TO_SBP(bp), &mp->m_sb); | |
941 | xfs_buf_delwri_queue(bp, &buffer_list); | |
942 | xfs_buf_relse(bp); | |
943 | ||
944 | /* don't hold too many buffers at once */ | |
945 | if (agno % 16) | |
946 | continue; | |
947 | ||
948 | error = xfs_buf_delwri_submit(&buffer_list); | |
949 | if (error) { | |
950 | xfs_warn(mp, | |
951 | "write error %d updating a secondary superblock near ag %d", | |
952 | error, agno); | |
953 | if (!saved_error) | |
954 | saved_error = error; | |
955 | continue; | |
956 | } | |
957 | } | |
958 | error = xfs_buf_delwri_submit(&buffer_list); | |
959 | if (error) { | |
960 | xfs_warn(mp, | |
961 | "write error %d updating a secondary superblock near ag %d", | |
962 | error, agno); | |
963 | } | |
964 | ||
965 | return saved_error ? saved_error : error; | |
966 | } | |
967 | ||
f7664b31 ES |
968 | /* |
969 | * Same behavior as xfs_sync_sb, except that it is always synchronous and it | |
970 | * also writes the superblock buffer to disk sector 0 immediately. | |
971 | */ | |
972 | int | |
973 | xfs_sync_sb_buf( | |
974 | struct xfs_mount *mp) | |
975 | { | |
976 | struct xfs_trans *tp; | |
89c2e711 | 977 | struct xfs_buf *bp; |
f7664b31 ES |
978 | int error; |
979 | ||
980 | error = xfs_trans_alloc(mp, &M_RES(mp)->tr_sb, 0, 0, 0, &tp); | |
981 | if (error) | |
982 | return error; | |
983 | ||
89c2e711 | 984 | bp = xfs_trans_getsb(tp, mp, 0); |
f7664b31 | 985 | xfs_log_sb(tp); |
89c2e711 | 986 | xfs_trans_bhold(tp, bp); |
f7664b31 ES |
987 | xfs_trans_set_sync(tp); |
988 | error = xfs_trans_commit(tp); | |
989 | if (error) | |
990 | goto out; | |
991 | /* | |
992 | * write out the sb buffer to get the changes to disk | |
993 | */ | |
89c2e711 | 994 | error = xfs_bwrite(bp); |
f7664b31 | 995 | out: |
89c2e711 | 996 | xfs_buf_relse(bp); |
f7664b31 ES |
997 | return error; |
998 | } | |
999 | ||
c368ebcd DW |
1000 | int |
1001 | xfs_fs_geometry( | |
ac503a4c DW |
1002 | struct xfs_sb *sbp, |
1003 | struct xfs_fsop_geom *geo, | |
1004 | int struct_version) | |
c368ebcd | 1005 | { |
ac503a4c DW |
1006 | memset(geo, 0, sizeof(struct xfs_fsop_geom)); |
1007 | ||
1008 | geo->blocksize = sbp->sb_blocksize; | |
1009 | geo->rtextsize = sbp->sb_rextsize; | |
1010 | geo->agblocks = sbp->sb_agblocks; | |
1011 | geo->agcount = sbp->sb_agcount; | |
1012 | geo->logblocks = sbp->sb_logblocks; | |
1013 | geo->sectsize = sbp->sb_sectsize; | |
1014 | geo->inodesize = sbp->sb_inodesize; | |
1015 | geo->imaxpct = sbp->sb_imax_pct; | |
1016 | geo->datablocks = sbp->sb_dblocks; | |
1017 | geo->rtblocks = sbp->sb_rblocks; | |
1018 | geo->rtextents = sbp->sb_rextents; | |
1019 | geo->logstart = sbp->sb_logstart; | |
1020 | BUILD_BUG_ON(sizeof(geo->uuid) != sizeof(sbp->sb_uuid)); | |
1021 | memcpy(geo->uuid, &sbp->sb_uuid, sizeof(sbp->sb_uuid)); | |
1022 | ||
1023 | if (struct_version < 2) | |
1024 | return 0; | |
1025 | ||
1026 | geo->sunit = sbp->sb_unit; | |
1027 | geo->swidth = sbp->sb_width; | |
1028 | ||
1029 | if (struct_version < 3) | |
1030 | return 0; | |
1031 | ||
1032 | geo->version = XFS_FSOP_GEOM_VERSION; | |
1033 | geo->flags = XFS_FSOP_GEOM_FLAGS_NLINK | | |
1034 | XFS_FSOP_GEOM_FLAGS_DIRV2; | |
1035 | if (xfs_sb_version_hasattr(sbp)) | |
1036 | geo->flags |= XFS_FSOP_GEOM_FLAGS_ATTR; | |
1037 | if (xfs_sb_version_hasquota(sbp)) | |
1038 | geo->flags |= XFS_FSOP_GEOM_FLAGS_QUOTA; | |
1039 | if (xfs_sb_version_hasalign(sbp)) | |
1040 | geo->flags |= XFS_FSOP_GEOM_FLAGS_IALIGN; | |
1041 | if (xfs_sb_version_hasdalign(sbp)) | |
1042 | geo->flags |= XFS_FSOP_GEOM_FLAGS_DALIGN; | |
1043 | if (xfs_sb_version_hasextflgbit(sbp)) | |
1044 | geo->flags |= XFS_FSOP_GEOM_FLAGS_EXTFLG; | |
1045 | if (xfs_sb_version_hassector(sbp)) | |
1046 | geo->flags |= XFS_FSOP_GEOM_FLAGS_SECTOR; | |
1047 | if (xfs_sb_version_hasasciici(sbp)) | |
1048 | geo->flags |= XFS_FSOP_GEOM_FLAGS_DIRV2CI; | |
1049 | if (xfs_sb_version_haslazysbcount(sbp)) | |
1050 | geo->flags |= XFS_FSOP_GEOM_FLAGS_LAZYSB; | |
1051 | if (xfs_sb_version_hasattr2(sbp)) | |
1052 | geo->flags |= XFS_FSOP_GEOM_FLAGS_ATTR2; | |
1053 | if (xfs_sb_version_hasprojid32bit(sbp)) | |
1054 | geo->flags |= XFS_FSOP_GEOM_FLAGS_PROJID32; | |
1055 | if (xfs_sb_version_hascrc(sbp)) | |
1056 | geo->flags |= XFS_FSOP_GEOM_FLAGS_V5SB; | |
1057 | if (xfs_sb_version_hasftype(sbp)) | |
1058 | geo->flags |= XFS_FSOP_GEOM_FLAGS_FTYPE; | |
1059 | if (xfs_sb_version_hasfinobt(sbp)) | |
1060 | geo->flags |= XFS_FSOP_GEOM_FLAGS_FINOBT; | |
1061 | if (xfs_sb_version_hassparseinodes(sbp)) | |
1062 | geo->flags |= XFS_FSOP_GEOM_FLAGS_SPINODES; | |
1063 | if (xfs_sb_version_hasrmapbt(sbp)) | |
1064 | geo->flags |= XFS_FSOP_GEOM_FLAGS_RMAPBT; | |
1065 | if (xfs_sb_version_hasreflink(sbp)) | |
1066 | geo->flags |= XFS_FSOP_GEOM_FLAGS_REFLINK; | |
1067 | if (xfs_sb_version_hassector(sbp)) | |
1068 | geo->logsectsize = sbp->sb_logsectsize; | |
1069 | else | |
1070 | geo->logsectsize = BBSIZE; | |
1071 | geo->rtsectsize = sbp->sb_blocksize; | |
1072 | geo->dirblocksize = xfs_dir2_dirblock_bytes(sbp); | |
1073 | ||
a8789a5a | 1074 | if (struct_version < 4) |
ac503a4c DW |
1075 | return 0; |
1076 | ||
1077 | if (xfs_sb_version_haslogv2(sbp)) | |
1078 | geo->flags |= XFS_FSOP_GEOM_FLAGS_LOGV2; | |
1079 | ||
1080 | geo->logsunit = sbp->sb_logsunit; | |
c368ebcd | 1081 | |
c368ebcd DW |
1082 | return 0; |
1083 | } | |
689e11c8 DW |
1084 | |
1085 | /* Read a secondary superblock. */ | |
1086 | int | |
1087 | xfs_sb_read_secondary( | |
1088 | struct xfs_mount *mp, | |
1089 | struct xfs_trans *tp, | |
1090 | xfs_agnumber_t agno, | |
1091 | struct xfs_buf **bpp) | |
1092 | { | |
1093 | struct xfs_buf *bp; | |
1094 | int error; | |
1095 | ||
1096 | ASSERT(agno != 0 && agno != NULLAGNUMBER); | |
1097 | error = xfs_trans_read_buf(mp, tp, mp->m_ddev_targp, | |
1098 | XFS_AG_DADDR(mp, agno, XFS_SB_BLOCK(mp)), | |
1099 | XFS_FSS_TO_BB(mp, 1), 0, &bp, &xfs_sb_buf_ops); | |
1100 | if (error) | |
1101 | return error; | |
1102 | xfs_buf_set_ref(bp, XFS_SSB_REF); | |
1103 | *bpp = bp; | |
1104 | return 0; | |
1105 | } | |
d25522f1 DW |
1106 | |
1107 | /* Get an uninitialised secondary superblock buffer. */ | |
1108 | int | |
1109 | xfs_sb_get_secondary( | |
1110 | struct xfs_mount *mp, | |
1111 | struct xfs_trans *tp, | |
1112 | xfs_agnumber_t agno, | |
1113 | struct xfs_buf **bpp) | |
1114 | { | |
1115 | struct xfs_buf *bp; | |
1116 | ||
1117 | ASSERT(agno != 0 && agno != NULLAGNUMBER); | |
1118 | bp = xfs_trans_get_buf(tp, mp->m_ddev_targp, | |
1119 | XFS_AG_DADDR(mp, agno, XFS_SB_BLOCK(mp)), | |
1120 | XFS_FSS_TO_BB(mp, 1), 0); | |
1121 | if (!bp) | |
1122 | return -ENOMEM; | |
1123 | bp->b_ops = &xfs_sb_buf_ops; | |
1124 | xfs_buf_oneshot(bp); | |
1125 | *bpp = bp; | |
1126 | return 0; | |
1127 | } |