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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" |
5f213ddb | 13 | #include "xfs_sb.h" |
ff55068c | 14 | #include "xfs_mount.h" |
ff55068c DC |
15 | #include "xfs_ialloc.h" |
16 | #include "xfs_alloc.h" | |
ff55068c | 17 | #include "xfs_error.h" |
ff55068c | 18 | #include "xfs_trace.h" |
239880ef | 19 | #include "xfs_trans.h" |
ff55068c | 20 | #include "xfs_buf_item.h" |
a4fbe6ab DC |
21 | #include "xfs_bmap_btree.h" |
22 | #include "xfs_alloc_btree.h" | |
a45086e2 | 23 | #include "xfs_log.h" |
035e00ac | 24 | #include "xfs_rmap_btree.h" |
1946b91c | 25 | #include "xfs_refcount_btree.h" |
c368ebcd | 26 | #include "xfs_da_format.h" |
39353ff6 | 27 | #include "xfs_health.h" |
ff55068c DC |
28 | |
29 | /* | |
30 | * Physical superblock buffer manipulations. Shared with libxfs in userspace. | |
31 | */ | |
32 | ||
ff55068c DC |
33 | /* |
34 | * Reference counting access wrappers to the perag structures. | |
35 | * Because we never free per-ag structures, the only thing we | |
36 | * have to protect against changes is the tree structure itself. | |
37 | */ | |
38 | struct xfs_perag * | |
39 | xfs_perag_get( | |
40 | struct xfs_mount *mp, | |
41 | xfs_agnumber_t agno) | |
42 | { | |
43 | struct xfs_perag *pag; | |
44 | int ref = 0; | |
45 | ||
46 | rcu_read_lock(); | |
47 | pag = radix_tree_lookup(&mp->m_perag_tree, agno); | |
48 | if (pag) { | |
49 | ASSERT(atomic_read(&pag->pag_ref) >= 0); | |
50 | ref = atomic_inc_return(&pag->pag_ref); | |
51 | } | |
52 | rcu_read_unlock(); | |
53 | trace_xfs_perag_get(mp, agno, ref, _RET_IP_); | |
54 | return pag; | |
55 | } | |
56 | ||
57 | /* | |
58 | * search from @first to find the next perag with the given tag set. | |
59 | */ | |
60 | struct xfs_perag * | |
61 | xfs_perag_get_tag( | |
62 | struct xfs_mount *mp, | |
63 | xfs_agnumber_t first, | |
64 | int tag) | |
65 | { | |
66 | struct xfs_perag *pag; | |
67 | int found; | |
68 | int ref; | |
69 | ||
70 | rcu_read_lock(); | |
71 | found = radix_tree_gang_lookup_tag(&mp->m_perag_tree, | |
72 | (void **)&pag, first, 1, tag); | |
73 | if (found <= 0) { | |
74 | rcu_read_unlock(); | |
75 | return NULL; | |
76 | } | |
77 | ref = atomic_inc_return(&pag->pag_ref); | |
78 | rcu_read_unlock(); | |
79 | trace_xfs_perag_get_tag(mp, pag->pag_agno, ref, _RET_IP_); | |
80 | return pag; | |
81 | } | |
82 | ||
83 | void | |
84 | xfs_perag_put( | |
85 | struct xfs_perag *pag) | |
86 | { | |
87 | int ref; | |
88 | ||
89 | ASSERT(atomic_read(&pag->pag_ref) > 0); | |
90 | ref = atomic_dec_return(&pag->pag_ref); | |
91 | trace_xfs_perag_put(pag->pag_mount, pag->pag_agno, ref, _RET_IP_); | |
92 | } | |
93 | ||
eca383fc | 94 | /* Check all the superblock fields we care about when reading one in. */ |
ff55068c | 95 | STATIC int |
eca383fc DW |
96 | xfs_validate_sb_read( |
97 | struct xfs_mount *mp, | |
98 | struct xfs_sb *sbp) | |
ff55068c | 99 | { |
eca383fc DW |
100 | if (XFS_SB_VERSION_NUM(sbp) != XFS_SB_VERSION_5) |
101 | return 0; | |
ff55068c DC |
102 | |
103 | /* | |
eca383fc DW |
104 | * Version 5 superblock feature mask validation. Reject combinations |
105 | * the kernel cannot support up front before checking anything else. | |
ff55068c | 106 | */ |
eca383fc DW |
107 | if (xfs_sb_has_compat_feature(sbp, XFS_SB_FEAT_COMPAT_UNKNOWN)) { |
108 | xfs_warn(mp, | |
f41febd2 | 109 | "Superblock has unknown compatible features (0x%x) enabled.", |
eca383fc DW |
110 | (sbp->sb_features_compat & XFS_SB_FEAT_COMPAT_UNKNOWN)); |
111 | xfs_warn(mp, | |
f41febd2 | 112 | "Using a more recent kernel is recommended."); |
eca383fc | 113 | } |
ff55068c | 114 | |
eca383fc DW |
115 | if (xfs_sb_has_ro_compat_feature(sbp, XFS_SB_FEAT_RO_COMPAT_UNKNOWN)) { |
116 | xfs_alert(mp, | |
ff55068c | 117 | "Superblock has unknown read-only compatible features (0x%x) enabled.", |
eca383fc DW |
118 | (sbp->sb_features_ro_compat & |
119 | XFS_SB_FEAT_RO_COMPAT_UNKNOWN)); | |
120 | if (!(mp->m_flags & XFS_MOUNT_RDONLY)) { | |
121 | xfs_warn(mp, | |
f41febd2 | 122 | "Attempted to mount read-only compatible filesystem read-write."); |
eca383fc | 123 | xfs_warn(mp, |
ff55068c | 124 | "Filesystem can only be safely mounted read only."); |
f41febd2 | 125 | |
2451337d | 126 | return -EINVAL; |
ff55068c | 127 | } |
eca383fc DW |
128 | } |
129 | if (xfs_sb_has_incompat_feature(sbp, XFS_SB_FEAT_INCOMPAT_UNKNOWN)) { | |
130 | xfs_warn(mp, | |
131 | "Superblock has unknown incompatible features (0x%x) enabled.", | |
132 | (sbp->sb_features_incompat & | |
133 | XFS_SB_FEAT_INCOMPAT_UNKNOWN)); | |
134 | xfs_warn(mp, | |
135 | "Filesystem cannot be safely mounted by this kernel."); | |
136 | return -EINVAL; | |
137 | } | |
138 | ||
139 | return 0; | |
140 | } | |
141 | ||
142 | /* Check all the superblock fields we care about when writing one out. */ | |
143 | STATIC int | |
144 | xfs_validate_sb_write( | |
145 | struct xfs_mount *mp, | |
1f31c98d | 146 | struct xfs_buf *bp, |
eca383fc DW |
147 | struct xfs_sb *sbp) |
148 | { | |
8756a5af BD |
149 | /* |
150 | * Carry out additional sb summary counter sanity checks when we write | |
151 | * the superblock. We skip this in the read validator because there | |
152 | * could be newer superblocks in the log and if the values are garbage | |
69775fd1 | 153 | * even after replay we'll recalculate them at the end of log mount. |
1f31c98d DW |
154 | * |
155 | * mkfs has traditionally written zeroed counters to inprogress and | |
156 | * secondary superblocks, so allow this usage to continue because | |
157 | * we never read counters from such superblocks. | |
8756a5af | 158 | */ |
1f31c98d DW |
159 | if (XFS_BUF_ADDR(bp) == XFS_SB_DADDR && !sbp->sb_inprogress && |
160 | (sbp->sb_fdblocks > sbp->sb_dblocks || | |
161 | !xfs_verify_icount(mp, sbp->sb_icount) || | |
162 | sbp->sb_ifree > sbp->sb_icount)) { | |
8756a5af BD |
163 | xfs_warn(mp, "SB summary counter sanity check failed"); |
164 | return -EFSCORRUPTED; | |
165 | } | |
166 | ||
eca383fc DW |
167 | if (XFS_SB_VERSION_NUM(sbp) != XFS_SB_VERSION_5) |
168 | return 0; | |
169 | ||
9e037cb7 DW |
170 | /* |
171 | * Version 5 superblock feature mask validation. Reject combinations | |
172 | * the kernel cannot support since we checked for unsupported bits in | |
173 | * the read verifier, which means that memory is corrupt. | |
174 | */ | |
175 | if (xfs_sb_has_compat_feature(sbp, XFS_SB_FEAT_COMPAT_UNKNOWN)) { | |
176 | xfs_warn(mp, | |
177 | "Corruption detected in superblock compatible features (0x%x)!", | |
178 | (sbp->sb_features_compat & XFS_SB_FEAT_COMPAT_UNKNOWN)); | |
179 | return -EFSCORRUPTED; | |
180 | } | |
181 | ||
182 | if (xfs_sb_has_ro_compat_feature(sbp, XFS_SB_FEAT_RO_COMPAT_UNKNOWN)) { | |
183 | xfs_alert(mp, | |
184 | "Corruption detected in superblock read-only compatible features (0x%x)!", | |
185 | (sbp->sb_features_ro_compat & | |
186 | XFS_SB_FEAT_RO_COMPAT_UNKNOWN)); | |
187 | return -EFSCORRUPTED; | |
188 | } | |
189 | if (xfs_sb_has_incompat_feature(sbp, XFS_SB_FEAT_INCOMPAT_UNKNOWN)) { | |
190 | xfs_warn(mp, | |
191 | "Corruption detected in superblock incompatible features (0x%x)!", | |
192 | (sbp->sb_features_incompat & | |
193 | XFS_SB_FEAT_INCOMPAT_UNKNOWN)); | |
194 | return -EFSCORRUPTED; | |
195 | } | |
196 | if (xfs_sb_has_incompat_log_feature(sbp, | |
197 | XFS_SB_FEAT_INCOMPAT_LOG_UNKNOWN)) { | |
198 | xfs_warn(mp, | |
199 | "Corruption detected in superblock incompatible log features (0x%x)!", | |
200 | (sbp->sb_features_log_incompat & | |
201 | XFS_SB_FEAT_INCOMPAT_LOG_UNKNOWN)); | |
202 | return -EFSCORRUPTED; | |
203 | } | |
eca383fc DW |
204 | |
205 | /* | |
206 | * We can't read verify the sb LSN because the read verifier is called | |
207 | * before the log is allocated and processed. We know the log is set up | |
208 | * before write verifier calls, so check it here. | |
209 | */ | |
210 | if (!xfs_log_check_lsn(mp, sbp->sb_lsn)) | |
211 | return -EFSCORRUPTED; | |
212 | ||
213 | return 0; | |
214 | } | |
215 | ||
216 | /* Check the validity of the SB. */ | |
217 | STATIC int | |
218 | xfs_validate_sb_common( | |
219 | struct xfs_mount *mp, | |
220 | struct xfs_buf *bp, | |
221 | struct xfs_sb *sbp) | |
222 | { | |
3e6e8afd | 223 | struct xfs_dsb *dsb = bp->b_addr; |
eca383fc DW |
224 | uint32_t agcount = 0; |
225 | uint32_t rem; | |
226 | ||
39708c20 | 227 | if (!xfs_verify_magic(bp, dsb->sb_magicnum)) { |
eca383fc DW |
228 | xfs_warn(mp, "bad magic number"); |
229 | return -EWRONGFS; | |
230 | } | |
231 | ||
232 | if (!xfs_sb_good_version(sbp)) { | |
233 | xfs_warn(mp, "bad version"); | |
234 | return -EWRONGFS; | |
ff55068c DC |
235 | } |
236 | ||
237 | if (xfs_sb_version_has_pquotino(sbp)) { | |
238 | if (sbp->sb_qflags & (XFS_OQUOTA_ENFD | XFS_OQUOTA_CHKD)) { | |
239 | xfs_notice(mp, | |
08e96e1a | 240 | "Version 5 of Super block has XFS_OQUOTA bits."); |
2451337d | 241 | return -EFSCORRUPTED; |
ff55068c DC |
242 | } |
243 | } else if (sbp->sb_qflags & (XFS_PQUOTA_ENFD | XFS_GQUOTA_ENFD | | |
244 | XFS_PQUOTA_CHKD | XFS_GQUOTA_CHKD)) { | |
245 | xfs_notice(mp, | |
08e96e1a | 246 | "Superblock earlier than Version 5 has XFS_[PQ]UOTA_{ENFD|CHKD} bits."); |
2451337d | 247 | return -EFSCORRUPTED; |
ff55068c DC |
248 | } |
249 | ||
e5376fc1 BF |
250 | /* |
251 | * Full inode chunks must be aligned to inode chunk size when | |
252 | * sparse inodes are enabled to support the sparse chunk | |
253 | * allocation algorithm and prevent overlapping inode records. | |
254 | */ | |
255 | if (xfs_sb_version_hassparseinodes(sbp)) { | |
256 | uint32_t align; | |
257 | ||
e5376fc1 BF |
258 | align = XFS_INODES_PER_CHUNK * sbp->sb_inodesize |
259 | >> sbp->sb_blocklog; | |
260 | if (sbp->sb_inoalignmt != align) { | |
261 | xfs_warn(mp, | |
262 | "Inode block alignment (%u) must match chunk size (%u) for sparse inodes.", | |
263 | sbp->sb_inoalignmt, align); | |
264 | return -EINVAL; | |
265 | } | |
266 | } | |
267 | ||
ff55068c DC |
268 | if (unlikely( |
269 | sbp->sb_logstart == 0 && mp->m_logdev_targp == mp->m_ddev_targp)) { | |
270 | xfs_warn(mp, | |
271 | "filesystem is marked as having an external log; " | |
272 | "specify logdev on the mount command line."); | |
2451337d | 273 | return -EINVAL; |
ff55068c DC |
274 | } |
275 | ||
276 | if (unlikely( | |
277 | sbp->sb_logstart != 0 && mp->m_logdev_targp != mp->m_ddev_targp)) { | |
278 | xfs_warn(mp, | |
279 | "filesystem is marked as having an internal log; " | |
280 | "do not specify logdev on the mount command line."); | |
2451337d | 281 | return -EINVAL; |
ff55068c DC |
282 | } |
283 | ||
4bb73d01 DW |
284 | /* Compute agcount for this number of dblocks and agblocks */ |
285 | if (sbp->sb_agblocks) { | |
286 | agcount = div_u64_rem(sbp->sb_dblocks, sbp->sb_agblocks, &rem); | |
287 | if (rem) | |
288 | agcount++; | |
289 | } | |
290 | ||
ff55068c DC |
291 | /* |
292 | * More sanity checking. Most of these were stolen directly from | |
293 | * xfs_repair. | |
294 | */ | |
295 | if (unlikely( | |
296 | sbp->sb_agcount <= 0 || | |
297 | sbp->sb_sectsize < XFS_MIN_SECTORSIZE || | |
298 | sbp->sb_sectsize > XFS_MAX_SECTORSIZE || | |
299 | sbp->sb_sectlog < XFS_MIN_SECTORSIZE_LOG || | |
300 | sbp->sb_sectlog > XFS_MAX_SECTORSIZE_LOG || | |
301 | sbp->sb_sectsize != (1 << sbp->sb_sectlog) || | |
302 | sbp->sb_blocksize < XFS_MIN_BLOCKSIZE || | |
303 | sbp->sb_blocksize > XFS_MAX_BLOCKSIZE || | |
304 | sbp->sb_blocklog < XFS_MIN_BLOCKSIZE_LOG || | |
305 | sbp->sb_blocklog > XFS_MAX_BLOCKSIZE_LOG || | |
306 | sbp->sb_blocksize != (1 << sbp->sb_blocklog) || | |
83d230eb | 307 | sbp->sb_dirblklog + sbp->sb_blocklog > XFS_MAX_BLOCKSIZE_LOG || |
ff55068c DC |
308 | sbp->sb_inodesize < XFS_DINODE_MIN_SIZE || |
309 | sbp->sb_inodesize > XFS_DINODE_MAX_SIZE || | |
310 | sbp->sb_inodelog < XFS_DINODE_MIN_LOG || | |
311 | sbp->sb_inodelog > XFS_DINODE_MAX_LOG || | |
312 | sbp->sb_inodesize != (1 << sbp->sb_inodelog) || | |
e1b05723 | 313 | sbp->sb_logsunit > XLOG_MAX_RECORD_BSIZE || |
392c6de9 | 314 | sbp->sb_inopblock != howmany(sbp->sb_blocksize,sbp->sb_inodesize) || |
4bb73d01 DW |
315 | XFS_FSB_TO_B(mp, sbp->sb_agblocks) < XFS_MIN_AG_BYTES || |
316 | XFS_FSB_TO_B(mp, sbp->sb_agblocks) > XFS_MAX_AG_BYTES || | |
317 | sbp->sb_agblklog != xfs_highbit32(sbp->sb_agblocks - 1) + 1 || | |
318 | agcount == 0 || agcount != sbp->sb_agcount || | |
ff55068c DC |
319 | (sbp->sb_blocklog - sbp->sb_inodelog != sbp->sb_inopblog) || |
320 | (sbp->sb_rextsize * sbp->sb_blocksize > XFS_MAX_RTEXTSIZE) || | |
321 | (sbp->sb_rextsize * sbp->sb_blocksize < XFS_MIN_RTEXTSIZE) || | |
322 | (sbp->sb_imax_pct > 100 /* zero sb_imax_pct is valid */) || | |
323 | sbp->sb_dblocks == 0 || | |
324 | sbp->sb_dblocks > XFS_MAX_DBLOCKS(sbp) || | |
ab3e57b5 DC |
325 | sbp->sb_dblocks < XFS_MIN_DBLOCKS(sbp) || |
326 | sbp->sb_shared_vn != 0)) { | |
5ef11eb0 | 327 | xfs_notice(mp, "SB sanity check failed"); |
2451337d | 328 | return -EFSCORRUPTED; |
bec9d48d DW |
329 | } |
330 | ||
fa4ca9c5 DC |
331 | if (sbp->sb_unit) { |
332 | if (!xfs_sb_version_hasdalign(sbp) || | |
333 | sbp->sb_unit > sbp->sb_width || | |
334 | (sbp->sb_width % sbp->sb_unit) != 0) { | |
335 | xfs_notice(mp, "SB stripe unit sanity check failed"); | |
336 | return -EFSCORRUPTED; | |
337 | } | |
338 | } else if (xfs_sb_version_hasdalign(sbp)) { | |
339 | xfs_notice(mp, "SB stripe alignment sanity check failed"); | |
340 | return -EFSCORRUPTED; | |
341 | } else if (sbp->sb_width) { | |
342 | xfs_notice(mp, "SB stripe width sanity check failed"); | |
343 | return -EFSCORRUPTED; | |
344 | } | |
345 | ||
346 | ||
bec9d48d DW |
347 | if (xfs_sb_version_hascrc(&mp->m_sb) && |
348 | sbp->sb_blocksize < XFS_MIN_CRC_BLOCKSIZE) { | |
349 | xfs_notice(mp, "v5 SB sanity check failed"); | |
350 | return -EFSCORRUPTED; | |
ff55068c DC |
351 | } |
352 | ||
353 | /* | |
354 | * Until this is fixed only page-sized or smaller data blocks work. | |
355 | */ | |
356 | if (unlikely(sbp->sb_blocksize > PAGE_SIZE)) { | |
357 | xfs_warn(mp, | |
358 | "File system with blocksize %d bytes. " | |
359 | "Only pagesize (%ld) or less will currently work.", | |
360 | sbp->sb_blocksize, PAGE_SIZE); | |
2451337d | 361 | return -ENOSYS; |
ff55068c DC |
362 | } |
363 | ||
364 | /* | |
365 | * Currently only very few inode sizes are supported. | |
366 | */ | |
367 | switch (sbp->sb_inodesize) { | |
368 | case 256: | |
369 | case 512: | |
370 | case 1024: | |
371 | case 2048: | |
372 | break; | |
373 | default: | |
374 | xfs_warn(mp, "inode size of %d bytes not supported", | |
375 | sbp->sb_inodesize); | |
2451337d | 376 | return -ENOSYS; |
ff55068c DC |
377 | } |
378 | ||
379 | if (xfs_sb_validate_fsb_count(sbp, sbp->sb_dblocks) || | |
380 | xfs_sb_validate_fsb_count(sbp, sbp->sb_rblocks)) { | |
381 | xfs_warn(mp, | |
382 | "file system too large to be mounted on this system."); | |
2451337d | 383 | return -EFBIG; |
ff55068c DC |
384 | } |
385 | ||
eca383fc DW |
386 | /* |
387 | * Don't touch the filesystem if a user tool thinks it owns the primary | |
388 | * superblock. mkfs doesn't clear the flag from secondary supers, so | |
389 | * we don't check them at all. | |
390 | */ | |
391 | if (XFS_BUF_ADDR(bp) == XFS_SB_DADDR && sbp->sb_inprogress) { | |
ff55068c | 392 | xfs_warn(mp, "Offline file system operation in progress!"); |
2451337d | 393 | return -EFSCORRUPTED; |
ff55068c | 394 | } |
ff55068c DC |
395 | return 0; |
396 | } | |
397 | ||
398 | void | |
399 | xfs_sb_quota_from_disk(struct xfs_sb *sbp) | |
400 | { | |
401 | /* | |
402 | * older mkfs doesn't initialize quota inodes to NULLFSINO. This | |
403 | * leads to in-core values having two different values for a quota | |
404 | * inode to be invalid: 0 and NULLFSINO. Change it to a single value | |
405 | * NULLFSINO. | |
406 | * | |
407 | * Note that this change affect only the in-core values. These | |
408 | * values are not written back to disk unless any quota information | |
409 | * is written to the disk. Even in that case, sb_pquotino field is | |
410 | * not written to disk unless the superblock supports pquotino. | |
411 | */ | |
412 | if (sbp->sb_uquotino == 0) | |
413 | sbp->sb_uquotino = NULLFSINO; | |
414 | if (sbp->sb_gquotino == 0) | |
415 | sbp->sb_gquotino = NULLFSINO; | |
416 | if (sbp->sb_pquotino == 0) | |
417 | sbp->sb_pquotino = NULLFSINO; | |
418 | ||
419 | /* | |
420 | * We need to do these manipilations only if we are working | |
421 | * with an older version of on-disk superblock. | |
422 | */ | |
423 | if (xfs_sb_version_has_pquotino(sbp)) | |
424 | return; | |
425 | ||
426 | if (sbp->sb_qflags & XFS_OQUOTA_ENFD) | |
427 | sbp->sb_qflags |= (sbp->sb_qflags & XFS_PQUOTA_ACCT) ? | |
428 | XFS_PQUOTA_ENFD : XFS_GQUOTA_ENFD; | |
429 | if (sbp->sb_qflags & XFS_OQUOTA_CHKD) | |
430 | sbp->sb_qflags |= (sbp->sb_qflags & XFS_PQUOTA_ACCT) ? | |
431 | XFS_PQUOTA_CHKD : XFS_GQUOTA_CHKD; | |
432 | sbp->sb_qflags &= ~(XFS_OQUOTA_ENFD | XFS_OQUOTA_CHKD); | |
433 | ||
e6fc6fcf ES |
434 | if (sbp->sb_qflags & XFS_PQUOTA_ACCT && |
435 | sbp->sb_gquotino != NULLFSINO) { | |
ff55068c DC |
436 | /* |
437 | * In older version of superblock, on-disk superblock only | |
438 | * has sb_gquotino, and in-core superblock has both sb_gquotino | |
439 | * and sb_pquotino. But, only one of them is supported at any | |
440 | * point of time. So, if PQUOTA is set in disk superblock, | |
e6fc6fcf ES |
441 | * copy over sb_gquotino to sb_pquotino. The NULLFSINO test |
442 | * above is to make sure we don't do this twice and wipe them | |
443 | * both out! | |
ff55068c DC |
444 | */ |
445 | sbp->sb_pquotino = sbp->sb_gquotino; | |
446 | sbp->sb_gquotino = NULLFSINO; | |
447 | } | |
448 | } | |
449 | ||
5ef828c4 ES |
450 | static void |
451 | __xfs_sb_from_disk( | |
ff55068c | 452 | struct xfs_sb *to, |
5ef828c4 ES |
453 | xfs_dsb_t *from, |
454 | bool convert_xquota) | |
ff55068c DC |
455 | { |
456 | to->sb_magicnum = be32_to_cpu(from->sb_magicnum); | |
457 | to->sb_blocksize = be32_to_cpu(from->sb_blocksize); | |
458 | to->sb_dblocks = be64_to_cpu(from->sb_dblocks); | |
459 | to->sb_rblocks = be64_to_cpu(from->sb_rblocks); | |
460 | to->sb_rextents = be64_to_cpu(from->sb_rextents); | |
461 | memcpy(&to->sb_uuid, &from->sb_uuid, sizeof(to->sb_uuid)); | |
462 | to->sb_logstart = be64_to_cpu(from->sb_logstart); | |
463 | to->sb_rootino = be64_to_cpu(from->sb_rootino); | |
464 | to->sb_rbmino = be64_to_cpu(from->sb_rbmino); | |
465 | to->sb_rsumino = be64_to_cpu(from->sb_rsumino); | |
466 | to->sb_rextsize = be32_to_cpu(from->sb_rextsize); | |
467 | to->sb_agblocks = be32_to_cpu(from->sb_agblocks); | |
468 | to->sb_agcount = be32_to_cpu(from->sb_agcount); | |
469 | to->sb_rbmblocks = be32_to_cpu(from->sb_rbmblocks); | |
470 | to->sb_logblocks = be32_to_cpu(from->sb_logblocks); | |
471 | to->sb_versionnum = be16_to_cpu(from->sb_versionnum); | |
472 | to->sb_sectsize = be16_to_cpu(from->sb_sectsize); | |
473 | to->sb_inodesize = be16_to_cpu(from->sb_inodesize); | |
474 | to->sb_inopblock = be16_to_cpu(from->sb_inopblock); | |
475 | memcpy(&to->sb_fname, &from->sb_fname, sizeof(to->sb_fname)); | |
476 | to->sb_blocklog = from->sb_blocklog; | |
477 | to->sb_sectlog = from->sb_sectlog; | |
478 | to->sb_inodelog = from->sb_inodelog; | |
479 | to->sb_inopblog = from->sb_inopblog; | |
480 | to->sb_agblklog = from->sb_agblklog; | |
481 | to->sb_rextslog = from->sb_rextslog; | |
482 | to->sb_inprogress = from->sb_inprogress; | |
483 | to->sb_imax_pct = from->sb_imax_pct; | |
484 | to->sb_icount = be64_to_cpu(from->sb_icount); | |
485 | to->sb_ifree = be64_to_cpu(from->sb_ifree); | |
486 | to->sb_fdblocks = be64_to_cpu(from->sb_fdblocks); | |
487 | to->sb_frextents = be64_to_cpu(from->sb_frextents); | |
488 | to->sb_uquotino = be64_to_cpu(from->sb_uquotino); | |
489 | to->sb_gquotino = be64_to_cpu(from->sb_gquotino); | |
490 | to->sb_qflags = be16_to_cpu(from->sb_qflags); | |
491 | to->sb_flags = from->sb_flags; | |
492 | to->sb_shared_vn = from->sb_shared_vn; | |
493 | to->sb_inoalignmt = be32_to_cpu(from->sb_inoalignmt); | |
494 | to->sb_unit = be32_to_cpu(from->sb_unit); | |
495 | to->sb_width = be32_to_cpu(from->sb_width); | |
496 | to->sb_dirblklog = from->sb_dirblklog; | |
497 | to->sb_logsectlog = from->sb_logsectlog; | |
498 | to->sb_logsectsize = be16_to_cpu(from->sb_logsectsize); | |
499 | to->sb_logsunit = be32_to_cpu(from->sb_logsunit); | |
500 | to->sb_features2 = be32_to_cpu(from->sb_features2); | |
501 | to->sb_bad_features2 = be32_to_cpu(from->sb_bad_features2); | |
502 | to->sb_features_compat = be32_to_cpu(from->sb_features_compat); | |
503 | to->sb_features_ro_compat = be32_to_cpu(from->sb_features_ro_compat); | |
504 | to->sb_features_incompat = be32_to_cpu(from->sb_features_incompat); | |
505 | to->sb_features_log_incompat = | |
506 | be32_to_cpu(from->sb_features_log_incompat); | |
04dd1a0d ES |
507 | /* crc is only used on disk, not in memory; just init to 0 here. */ |
508 | to->sb_crc = 0; | |
fb4f2b4e | 509 | to->sb_spino_align = be32_to_cpu(from->sb_spino_align); |
ff55068c DC |
510 | to->sb_pquotino = be64_to_cpu(from->sb_pquotino); |
511 | to->sb_lsn = be64_to_cpu(from->sb_lsn); | |
ce748eaa ES |
512 | /* |
513 | * sb_meta_uuid is only on disk if it differs from sb_uuid and the | |
514 | * feature flag is set; if not set we keep it only in memory. | |
515 | */ | |
516 | if (xfs_sb_version_hasmetauuid(to)) | |
517 | uuid_copy(&to->sb_meta_uuid, &from->sb_meta_uuid); | |
518 | else | |
519 | uuid_copy(&to->sb_meta_uuid, &from->sb_uuid); | |
5ef828c4 ES |
520 | /* Convert on-disk flags to in-memory flags? */ |
521 | if (convert_xquota) | |
522 | xfs_sb_quota_from_disk(to); | |
523 | } | |
524 | ||
525 | void | |
526 | xfs_sb_from_disk( | |
527 | struct xfs_sb *to, | |
528 | xfs_dsb_t *from) | |
529 | { | |
530 | __xfs_sb_from_disk(to, from, true); | |
ff55068c DC |
531 | } |
532 | ||
4d11a402 | 533 | static void |
ff55068c | 534 | xfs_sb_quota_to_disk( |
4d11a402 DC |
535 | struct xfs_dsb *to, |
536 | struct xfs_sb *from) | |
ff55068c | 537 | { |
c8ce540d | 538 | uint16_t qflags = from->sb_qflags; |
ff55068c | 539 | |
4d11a402 DC |
540 | to->sb_uquotino = cpu_to_be64(from->sb_uquotino); |
541 | if (xfs_sb_version_has_pquotino(from)) { | |
542 | to->sb_qflags = cpu_to_be16(from->sb_qflags); | |
543 | to->sb_gquotino = cpu_to_be64(from->sb_gquotino); | |
544 | to->sb_pquotino = cpu_to_be64(from->sb_pquotino); | |
545 | return; | |
546 | } | |
547 | ||
ff55068c | 548 | /* |
4d11a402 DC |
549 | * The in-core version of sb_qflags do not have XFS_OQUOTA_* |
550 | * flags, whereas the on-disk version does. So, convert incore | |
551 | * XFS_{PG}QUOTA_* flags to on-disk XFS_OQUOTA_* flags. | |
ff55068c | 552 | */ |
4d11a402 DC |
553 | qflags &= ~(XFS_PQUOTA_ENFD | XFS_PQUOTA_CHKD | |
554 | XFS_GQUOTA_ENFD | XFS_GQUOTA_CHKD); | |
ff55068c | 555 | |
4d11a402 DC |
556 | if (from->sb_qflags & |
557 | (XFS_PQUOTA_ENFD | XFS_GQUOTA_ENFD)) | |
558 | qflags |= XFS_OQUOTA_ENFD; | |
559 | if (from->sb_qflags & | |
560 | (XFS_PQUOTA_CHKD | XFS_GQUOTA_CHKD)) | |
561 | qflags |= XFS_OQUOTA_CHKD; | |
562 | to->sb_qflags = cpu_to_be16(qflags); | |
ff55068c DC |
563 | |
564 | /* | |
4d11a402 DC |
565 | * GQUOTINO and PQUOTINO cannot be used together in versions |
566 | * of superblock that do not have pquotino. from->sb_flags | |
567 | * tells us which quota is active and should be copied to | |
568 | * disk. If neither are active, we should NULL the inode. | |
03e01349 | 569 | * |
4d11a402 DC |
570 | * In all cases, the separate pquotino must remain 0 because it |
571 | * it beyond the "end" of the valid non-pquotino superblock. | |
ff55068c | 572 | */ |
4d11a402 | 573 | if (from->sb_qflags & XFS_GQUOTA_ACCT) |
ff55068c | 574 | to->sb_gquotino = cpu_to_be64(from->sb_gquotino); |
4d11a402 | 575 | else if (from->sb_qflags & XFS_PQUOTA_ACCT) |
ff55068c | 576 | to->sb_gquotino = cpu_to_be64(from->sb_pquotino); |
03e01349 DC |
577 | else { |
578 | /* | |
579 | * We can't rely on just the fields being logged to tell us | |
580 | * that it is safe to write NULLFSINO - we should only do that | |
581 | * if quotas are not actually enabled. Hence only write | |
582 | * NULLFSINO if both in-core quota inodes are NULL. | |
583 | */ | |
584 | if (from->sb_gquotino == NULLFSINO && | |
585 | from->sb_pquotino == NULLFSINO) | |
586 | to->sb_gquotino = cpu_to_be64(NULLFSINO); | |
587 | } | |
ff55068c | 588 | |
4d11a402 | 589 | to->sb_pquotino = 0; |
ff55068c DC |
590 | } |
591 | ||
ff55068c DC |
592 | void |
593 | xfs_sb_to_disk( | |
4d11a402 DC |
594 | struct xfs_dsb *to, |
595 | struct xfs_sb *from) | |
ff55068c | 596 | { |
4d11a402 DC |
597 | xfs_sb_quota_to_disk(to, from); |
598 | ||
599 | to->sb_magicnum = cpu_to_be32(from->sb_magicnum); | |
600 | to->sb_blocksize = cpu_to_be32(from->sb_blocksize); | |
601 | to->sb_dblocks = cpu_to_be64(from->sb_dblocks); | |
602 | to->sb_rblocks = cpu_to_be64(from->sb_rblocks); | |
603 | to->sb_rextents = cpu_to_be64(from->sb_rextents); | |
604 | memcpy(&to->sb_uuid, &from->sb_uuid, sizeof(to->sb_uuid)); | |
605 | to->sb_logstart = cpu_to_be64(from->sb_logstart); | |
606 | to->sb_rootino = cpu_to_be64(from->sb_rootino); | |
607 | to->sb_rbmino = cpu_to_be64(from->sb_rbmino); | |
608 | to->sb_rsumino = cpu_to_be64(from->sb_rsumino); | |
609 | to->sb_rextsize = cpu_to_be32(from->sb_rextsize); | |
610 | to->sb_agblocks = cpu_to_be32(from->sb_agblocks); | |
611 | to->sb_agcount = cpu_to_be32(from->sb_agcount); | |
612 | to->sb_rbmblocks = cpu_to_be32(from->sb_rbmblocks); | |
613 | to->sb_logblocks = cpu_to_be32(from->sb_logblocks); | |
614 | to->sb_versionnum = cpu_to_be16(from->sb_versionnum); | |
615 | to->sb_sectsize = cpu_to_be16(from->sb_sectsize); | |
616 | to->sb_inodesize = cpu_to_be16(from->sb_inodesize); | |
617 | to->sb_inopblock = cpu_to_be16(from->sb_inopblock); | |
618 | memcpy(&to->sb_fname, &from->sb_fname, sizeof(to->sb_fname)); | |
619 | to->sb_blocklog = from->sb_blocklog; | |
620 | to->sb_sectlog = from->sb_sectlog; | |
621 | to->sb_inodelog = from->sb_inodelog; | |
622 | to->sb_inopblog = from->sb_inopblog; | |
623 | to->sb_agblklog = from->sb_agblklog; | |
624 | to->sb_rextslog = from->sb_rextslog; | |
625 | to->sb_inprogress = from->sb_inprogress; | |
626 | to->sb_imax_pct = from->sb_imax_pct; | |
627 | to->sb_icount = cpu_to_be64(from->sb_icount); | |
628 | to->sb_ifree = cpu_to_be64(from->sb_ifree); | |
629 | to->sb_fdblocks = cpu_to_be64(from->sb_fdblocks); | |
630 | to->sb_frextents = cpu_to_be64(from->sb_frextents); | |
ff55068c | 631 | |
4d11a402 DC |
632 | to->sb_flags = from->sb_flags; |
633 | to->sb_shared_vn = from->sb_shared_vn; | |
634 | to->sb_inoalignmt = cpu_to_be32(from->sb_inoalignmt); | |
635 | to->sb_unit = cpu_to_be32(from->sb_unit); | |
636 | to->sb_width = cpu_to_be32(from->sb_width); | |
637 | to->sb_dirblklog = from->sb_dirblklog; | |
638 | to->sb_logsectlog = from->sb_logsectlog; | |
639 | to->sb_logsectsize = cpu_to_be16(from->sb_logsectsize); | |
640 | to->sb_logsunit = cpu_to_be32(from->sb_logsunit); | |
074e427b DC |
641 | |
642 | /* | |
643 | * We need to ensure that bad_features2 always matches features2. | |
644 | * Hence we enforce that here rather than having to remember to do it | |
645 | * everywhere else that updates features2. | |
646 | */ | |
647 | from->sb_bad_features2 = from->sb_features2; | |
4d11a402 DC |
648 | to->sb_features2 = cpu_to_be32(from->sb_features2); |
649 | to->sb_bad_features2 = cpu_to_be32(from->sb_bad_features2); | |
650 | ||
651 | if (xfs_sb_version_hascrc(from)) { | |
652 | to->sb_features_compat = cpu_to_be32(from->sb_features_compat); | |
653 | to->sb_features_ro_compat = | |
654 | cpu_to_be32(from->sb_features_ro_compat); | |
655 | to->sb_features_incompat = | |
656 | cpu_to_be32(from->sb_features_incompat); | |
657 | to->sb_features_log_incompat = | |
658 | cpu_to_be32(from->sb_features_log_incompat); | |
fb4f2b4e | 659 | to->sb_spino_align = cpu_to_be32(from->sb_spino_align); |
4d11a402 | 660 | to->sb_lsn = cpu_to_be64(from->sb_lsn); |
ce748eaa ES |
661 | if (xfs_sb_version_hasmetauuid(from)) |
662 | uuid_copy(&to->sb_meta_uuid, &from->sb_meta_uuid); | |
ff55068c DC |
663 | } |
664 | } | |
665 | ||
ff55068c DC |
666 | /* |
667 | * If the superblock has the CRC feature bit set or the CRC field is non-null, | |
668 | * check that the CRC is valid. We check the CRC field is non-null because a | |
669 | * single bit error could clear the feature bit and unused parts of the | |
670 | * superblock are supposed to be zero. Hence a non-null crc field indicates that | |
671 | * we've potentially lost a feature bit and we should check it anyway. | |
10e6e65d ES |
672 | * |
673 | * However, past bugs (i.e. in growfs) left non-zeroed regions beyond the | |
674 | * last field in V4 secondary superblocks. So for secondary superblocks, | |
675 | * we are more forgiving, and ignore CRC failures if the primary doesn't | |
676 | * indicate that the fs version is V5. | |
ff55068c DC |
677 | */ |
678 | static void | |
679 | xfs_sb_read_verify( | |
eca383fc | 680 | struct xfs_buf *bp) |
ff55068c | 681 | { |
eca383fc | 682 | struct xfs_sb sb; |
dbd329f1 | 683 | struct xfs_mount *mp = bp->b_mount; |
3e6e8afd | 684 | struct xfs_dsb *dsb = bp->b_addr; |
eca383fc | 685 | int error; |
ff55068c DC |
686 | |
687 | /* | |
688 | * open code the version check to avoid needing to convert the entire | |
689 | * superblock from disk order just to check the version number | |
690 | */ | |
691 | if (dsb->sb_magicnum == cpu_to_be32(XFS_SB_MAGIC) && | |
692 | (((be16_to_cpu(dsb->sb_versionnum) & XFS_SB_VERSION_NUMBITS) == | |
693 | XFS_SB_VERSION_5) || | |
694 | dsb->sb_crc != 0)) { | |
695 | ||
51582170 | 696 | if (!xfs_buf_verify_cksum(bp, XFS_SB_CRC_OFF)) { |
10e6e65d | 697 | /* Only fail bad secondaries on a known V5 filesystem */ |
7a01e707 | 698 | if (bp->b_bn == XFS_SB_DADDR || |
10e6e65d | 699 | xfs_sb_version_hascrc(&mp->m_sb)) { |
2451337d | 700 | error = -EFSBADCRC; |
10e6e65d ES |
701 | goto out_error; |
702 | } | |
ff55068c DC |
703 | } |
704 | } | |
eca383fc DW |
705 | |
706 | /* | |
707 | * Check all the superblock fields. Don't byteswap the xquota flags | |
708 | * because _verify_common checks the on-disk values. | |
709 | */ | |
3e6e8afd | 710 | __xfs_sb_from_disk(&sb, dsb, false); |
eca383fc DW |
711 | error = xfs_validate_sb_common(mp, bp, &sb); |
712 | if (error) | |
713 | goto out_error; | |
714 | error = xfs_validate_sb_read(mp, &sb); | |
ff55068c DC |
715 | |
716 | out_error: | |
31ca03c9 | 717 | if (error == -EFSCORRUPTED || error == -EFSBADCRC) |
bc1a09b8 | 718 | xfs_verifier_error(bp, error, __this_address); |
31ca03c9 | 719 | else if (error) |
ff55068c | 720 | xfs_buf_ioerror(bp, error); |
ff55068c DC |
721 | } |
722 | ||
723 | /* | |
724 | * We may be probed for a filesystem match, so we may not want to emit | |
725 | * messages when the superblock buffer is not actually an XFS superblock. | |
2533787a | 726 | * If we find an XFS superblock, then run a normal, noisy mount because we are |
ff55068c DC |
727 | * really going to mount it and want to know about errors. |
728 | */ | |
729 | static void | |
730 | xfs_sb_quiet_read_verify( | |
731 | struct xfs_buf *bp) | |
732 | { | |
3e6e8afd | 733 | struct xfs_dsb *dsb = bp->b_addr; |
ff55068c | 734 | |
ff55068c DC |
735 | if (dsb->sb_magicnum == cpu_to_be32(XFS_SB_MAGIC)) { |
736 | /* XFS filesystem, verify noisily! */ | |
737 | xfs_sb_read_verify(bp); | |
738 | return; | |
739 | } | |
740 | /* quietly fail */ | |
2451337d | 741 | xfs_buf_ioerror(bp, -EWRONGFS); |
ff55068c DC |
742 | } |
743 | ||
744 | static void | |
745 | xfs_sb_write_verify( | |
746 | struct xfs_buf *bp) | |
747 | { | |
eca383fc | 748 | struct xfs_sb sb; |
dbd329f1 | 749 | struct xfs_mount *mp = bp->b_mount; |
fb1755a6 | 750 | struct xfs_buf_log_item *bip = bp->b_log_item; |
3e6e8afd | 751 | struct xfs_dsb *dsb = bp->b_addr; |
ff55068c DC |
752 | int error; |
753 | ||
eca383fc DW |
754 | /* |
755 | * Check all the superblock fields. Don't byteswap the xquota flags | |
756 | * because _verify_common checks the on-disk values. | |
757 | */ | |
3e6e8afd | 758 | __xfs_sb_from_disk(&sb, dsb, false); |
eca383fc DW |
759 | error = xfs_validate_sb_common(mp, bp, &sb); |
760 | if (error) | |
761 | goto out_error; | |
1f31c98d | 762 | error = xfs_validate_sb_write(mp, bp, &sb); |
eca383fc DW |
763 | if (error) |
764 | goto out_error; | |
ff55068c DC |
765 | |
766 | if (!xfs_sb_version_hascrc(&mp->m_sb)) | |
767 | return; | |
768 | ||
769 | if (bip) | |
3e6e8afd | 770 | dsb->sb_lsn = cpu_to_be64(bip->bli_item.li_lsn); |
ff55068c | 771 | |
f1dbcd7e | 772 | xfs_buf_update_cksum(bp, XFS_SB_CRC_OFF); |
eca383fc DW |
773 | return; |
774 | ||
775 | out_error: | |
776 | xfs_verifier_error(bp, error, __this_address); | |
ff55068c DC |
777 | } |
778 | ||
779 | const struct xfs_buf_ops xfs_sb_buf_ops = { | |
233135b7 | 780 | .name = "xfs_sb", |
39708c20 | 781 | .magic = { cpu_to_be32(XFS_SB_MAGIC), cpu_to_be32(XFS_SB_MAGIC) }, |
ff55068c DC |
782 | .verify_read = xfs_sb_read_verify, |
783 | .verify_write = xfs_sb_write_verify, | |
784 | }; | |
785 | ||
786 | const struct xfs_buf_ops xfs_sb_quiet_buf_ops = { | |
233135b7 | 787 | .name = "xfs_sb_quiet", |
39708c20 | 788 | .magic = { cpu_to_be32(XFS_SB_MAGIC), cpu_to_be32(XFS_SB_MAGIC) }, |
ff55068c DC |
789 | .verify_read = xfs_sb_quiet_read_verify, |
790 | .verify_write = xfs_sb_write_verify, | |
791 | }; | |
792 | ||
793 | /* | |
794 | * xfs_mount_common | |
795 | * | |
796 | * Mount initialization code establishing various mount | |
797 | * fields from the superblock associated with the given | |
494dba7b DW |
798 | * mount structure. |
799 | * | |
800 | * Inode geometry are calculated in xfs_ialloc_setup_geometry. | |
ff55068c DC |
801 | */ |
802 | void | |
803 | xfs_sb_mount_common( | |
ef325959 DW |
804 | struct xfs_mount *mp, |
805 | struct xfs_sb *sbp) | |
ff55068c DC |
806 | { |
807 | mp->m_agfrotor = mp->m_agirotor = 0; | |
ff55068c DC |
808 | mp->m_maxagi = mp->m_sb.sb_agcount; |
809 | mp->m_blkbit_log = sbp->sb_blocklog + XFS_NBBYLOG; | |
810 | mp->m_blkbb_log = sbp->sb_blocklog - BBSHIFT; | |
811 | mp->m_sectbb_log = sbp->sb_sectlog - BBSHIFT; | |
812 | mp->m_agno_log = xfs_highbit32(sbp->sb_agcount - 1) + 1; | |
ff55068c DC |
813 | mp->m_blockmask = sbp->sb_blocksize - 1; |
814 | mp->m_blockwsize = sbp->sb_blocksize >> XFS_WORDLOG; | |
815 | mp->m_blockwmask = mp->m_blockwsize - 1; | |
816 | ||
817 | mp->m_alloc_mxr[0] = xfs_allocbt_maxrecs(mp, sbp->sb_blocksize, 1); | |
818 | mp->m_alloc_mxr[1] = xfs_allocbt_maxrecs(mp, sbp->sb_blocksize, 0); | |
819 | mp->m_alloc_mnr[0] = mp->m_alloc_mxr[0] / 2; | |
820 | mp->m_alloc_mnr[1] = mp->m_alloc_mxr[1] / 2; | |
821 | ||
ff55068c DC |
822 | mp->m_bmap_dmxr[0] = xfs_bmbt_maxrecs(mp, sbp->sb_blocksize, 1); |
823 | mp->m_bmap_dmxr[1] = xfs_bmbt_maxrecs(mp, sbp->sb_blocksize, 0); | |
824 | mp->m_bmap_dmnr[0] = mp->m_bmap_dmxr[0] / 2; | |
825 | mp->m_bmap_dmnr[1] = mp->m_bmap_dmxr[1] / 2; | |
826 | ||
a1f69417 ES |
827 | mp->m_rmap_mxr[0] = xfs_rmapbt_maxrecs(sbp->sb_blocksize, 1); |
828 | mp->m_rmap_mxr[1] = xfs_rmapbt_maxrecs(sbp->sb_blocksize, 0); | |
035e00ac DW |
829 | mp->m_rmap_mnr[0] = mp->m_rmap_mxr[0] / 2; |
830 | mp->m_rmap_mnr[1] = mp->m_rmap_mxr[1] / 2; | |
831 | ||
a1f69417 ES |
832 | mp->m_refc_mxr[0] = xfs_refcountbt_maxrecs(sbp->sb_blocksize, true); |
833 | mp->m_refc_mxr[1] = xfs_refcountbt_maxrecs(sbp->sb_blocksize, false); | |
1946b91c DW |
834 | mp->m_refc_mnr[0] = mp->m_refc_mxr[0] / 2; |
835 | mp->m_refc_mnr[1] = mp->m_refc_mxr[1] / 2; | |
836 | ||
ff55068c | 837 | mp->m_bsize = XFS_FSB_TO_BB(mp, 1); |
52548852 DW |
838 | mp->m_alloc_set_aside = xfs_alloc_set_aside(mp); |
839 | mp->m_ag_max_usable = xfs_alloc_ag_max_usable(mp); | |
ff55068c DC |
840 | } |
841 | ||
842 | /* | |
843 | * xfs_initialize_perag_data | |
844 | * | |
845 | * Read in each per-ag structure so we can count up the number of | |
846 | * allocated inodes, free inodes and used filesystem blocks as this | |
847 | * information is no longer persistent in the superblock. Once we have | |
848 | * this information, write it into the in-core superblock structure. | |
849 | */ | |
850 | int | |
851 | xfs_initialize_perag_data( | |
852 | struct xfs_mount *mp, | |
853 | xfs_agnumber_t agcount) | |
854 | { | |
855 | xfs_agnumber_t index; | |
856 | xfs_perag_t *pag; | |
857 | xfs_sb_t *sbp = &mp->m_sb; | |
858 | uint64_t ifree = 0; | |
859 | uint64_t ialloc = 0; | |
860 | uint64_t bfree = 0; | |
861 | uint64_t bfreelst = 0; | |
862 | uint64_t btree = 0; | |
2e9e6481 | 863 | uint64_t fdblocks; |
c1a4447f | 864 | int error = 0; |
ff55068c DC |
865 | |
866 | for (index = 0; index < agcount; index++) { | |
867 | /* | |
868 | * read the agf, then the agi. This gets us | |
869 | * all the information we need and populates the | |
870 | * per-ag structures for us. | |
871 | */ | |
872 | error = xfs_alloc_pagf_init(mp, NULL, index, 0); | |
873 | if (error) | |
874 | return error; | |
875 | ||
876 | error = xfs_ialloc_pagi_init(mp, NULL, index); | |
877 | if (error) | |
878 | return error; | |
879 | pag = xfs_perag_get(mp, index); | |
880 | ifree += pag->pagi_freecount; | |
881 | ialloc += pag->pagi_count; | |
882 | bfree += pag->pagf_freeblks; | |
883 | bfreelst += pag->pagf_flcount; | |
884 | btree += pag->pagf_btreeblks; | |
885 | xfs_perag_put(pag); | |
886 | } | |
2e9e6481 DW |
887 | fdblocks = bfree + bfreelst + btree; |
888 | ||
889 | /* | |
890 | * If the new summary counts are obviously incorrect, fail the | |
891 | * mount operation because that implies the AGFs are also corrupt. | |
39353ff6 | 892 | * Clear FS_COUNTERS so that we don't unmount with a dirty log, which |
2e9e6481 DW |
893 | * will prevent xfs_repair from fixing anything. |
894 | */ | |
895 | if (fdblocks > sbp->sb_dblocks || ifree > ialloc) { | |
896 | xfs_alert(mp, "AGF corruption. Please run xfs_repair."); | |
897 | error = -EFSCORRUPTED; | |
898 | goto out; | |
899 | } | |
5681ca40 DC |
900 | |
901 | /* Overwrite incore superblock counters with just-read data */ | |
ff55068c DC |
902 | spin_lock(&mp->m_sb_lock); |
903 | sbp->sb_ifree = ifree; | |
904 | sbp->sb_icount = ialloc; | |
2e9e6481 | 905 | sbp->sb_fdblocks = fdblocks; |
ff55068c DC |
906 | spin_unlock(&mp->m_sb_lock); |
907 | ||
5681ca40 | 908 | xfs_reinit_percpu_counters(mp); |
2e9e6481 | 909 | out: |
39353ff6 | 910 | xfs_fs_mark_healthy(mp, XFS_SICK_FS_COUNTERS); |
2e9e6481 | 911 | return error; |
ff55068c DC |
912 | } |
913 | ||
914 | /* | |
61e63ecb DC |
915 | * xfs_log_sb() can be used to copy arbitrary changes to the in-core superblock |
916 | * into the superblock buffer to be logged. It does not provide the higher | |
917 | * level of locking that is needed to protect the in-core superblock from | |
918 | * concurrent access. | |
ff55068c DC |
919 | */ |
920 | void | |
61e63ecb | 921 | xfs_log_sb( |
4d11a402 | 922 | struct xfs_trans *tp) |
ff55068c | 923 | { |
4d11a402 | 924 | struct xfs_mount *mp = tp->t_mountp; |
8c9ce2f7 | 925 | struct xfs_buf *bp = xfs_trans_getsb(tp, mp); |
ff55068c | 926 | |
501ab323 | 927 | mp->m_sb.sb_icount = percpu_counter_sum(&mp->m_icount); |
e88b64ea | 928 | mp->m_sb.sb_ifree = percpu_counter_sum(&mp->m_ifree); |
0d485ada | 929 | mp->m_sb.sb_fdblocks = percpu_counter_sum(&mp->m_fdblocks); |
501ab323 | 930 | |
3e6e8afd | 931 | xfs_sb_to_disk(bp->b_addr, &mp->m_sb); |
ff55068c | 932 | xfs_trans_buf_set_type(tp, bp, XFS_BLFT_SB_BUF); |
6f4ff81a | 933 | xfs_trans_log_buf(tp, bp, 0, sizeof(struct xfs_dsb) - 1); |
ff55068c | 934 | } |
61e63ecb DC |
935 | |
936 | /* | |
937 | * xfs_sync_sb | |
938 | * | |
939 | * Sync the superblock to disk. | |
940 | * | |
941 | * Note that the caller is responsible for checking the frozen state of the | |
942 | * filesystem. This procedure uses the non-blocking transaction allocator and | |
943 | * thus will allow modifications to a frozen fs. This is required because this | |
944 | * code can be called during the process of freezing where use of the high-level | |
945 | * allocator would deadlock. | |
946 | */ | |
947 | int | |
948 | xfs_sync_sb( | |
949 | struct xfs_mount *mp, | |
950 | bool wait) | |
951 | { | |
952 | struct xfs_trans *tp; | |
953 | int error; | |
954 | ||
253f4911 CH |
955 | error = xfs_trans_alloc(mp, &M_RES(mp)->tr_sb, 0, 0, |
956 | XFS_TRANS_NO_WRITECOUNT, &tp); | |
957 | if (error) | |
61e63ecb | 958 | return error; |
61e63ecb DC |
959 | |
960 | xfs_log_sb(tp); | |
961 | if (wait) | |
962 | xfs_trans_set_sync(tp); | |
70393313 | 963 | return xfs_trans_commit(tp); |
61e63ecb | 964 | } |
c368ebcd | 965 | |
b16817b6 DC |
966 | /* |
967 | * Update all the secondary superblocks to match the new state of the primary. | |
968 | * Because we are completely overwriting all the existing fields in the | |
969 | * secondary superblock buffers, there is no need to read them in from disk. | |
970 | * Just get a new buffer, stamp it and write it. | |
971 | * | |
972 | * The sb buffers need to be cached here so that we serialise against other | |
973 | * operations that access the secondary superblocks, but we don't want to keep | |
974 | * them in memory once it is written so we mark it as a one-shot buffer. | |
975 | */ | |
976 | int | |
977 | xfs_update_secondary_sbs( | |
978 | struct xfs_mount *mp) | |
979 | { | |
980 | xfs_agnumber_t agno; | |
981 | int saved_error = 0; | |
982 | int error = 0; | |
983 | LIST_HEAD (buffer_list); | |
984 | ||
985 | /* update secondary superblocks. */ | |
986 | for (agno = 1; agno < mp->m_sb.sb_agcount; agno++) { | |
987 | struct xfs_buf *bp; | |
988 | ||
841263e9 | 989 | error = xfs_buf_get(mp->m_ddev_targp, |
b16817b6 | 990 | XFS_AG_DADDR(mp, agno, XFS_SB_DADDR), |
841263e9 | 991 | XFS_FSS_TO_BB(mp, 1), &bp); |
b16817b6 DC |
992 | /* |
993 | * If we get an error reading or writing alternate superblocks, | |
994 | * continue. xfs_repair chooses the "best" superblock based | |
995 | * on most matches; if we break early, we'll leave more | |
996 | * superblocks un-updated than updated, and xfs_repair may | |
997 | * pick them over the properly-updated primary. | |
998 | */ | |
841263e9 | 999 | if (error) { |
b16817b6 DC |
1000 | xfs_warn(mp, |
1001 | "error allocating secondary superblock for ag %d", | |
1002 | agno); | |
1003 | if (!saved_error) | |
841263e9 | 1004 | saved_error = error; |
b16817b6 DC |
1005 | continue; |
1006 | } | |
1007 | ||
1008 | bp->b_ops = &xfs_sb_buf_ops; | |
1009 | xfs_buf_oneshot(bp); | |
1010 | xfs_buf_zero(bp, 0, BBTOB(bp->b_length)); | |
3e6e8afd | 1011 | xfs_sb_to_disk(bp->b_addr, &mp->m_sb); |
b16817b6 DC |
1012 | xfs_buf_delwri_queue(bp, &buffer_list); |
1013 | xfs_buf_relse(bp); | |
1014 | ||
1015 | /* don't hold too many buffers at once */ | |
1016 | if (agno % 16) | |
1017 | continue; | |
1018 | ||
1019 | error = xfs_buf_delwri_submit(&buffer_list); | |
1020 | if (error) { | |
1021 | xfs_warn(mp, | |
1022 | "write error %d updating a secondary superblock near ag %d", | |
1023 | error, agno); | |
1024 | if (!saved_error) | |
1025 | saved_error = error; | |
1026 | continue; | |
1027 | } | |
1028 | } | |
1029 | error = xfs_buf_delwri_submit(&buffer_list); | |
1030 | if (error) { | |
1031 | xfs_warn(mp, | |
1032 | "write error %d updating a secondary superblock near ag %d", | |
1033 | error, agno); | |
1034 | } | |
1035 | ||
1036 | return saved_error ? saved_error : error; | |
1037 | } | |
1038 | ||
f7664b31 ES |
1039 | /* |
1040 | * Same behavior as xfs_sync_sb, except that it is always synchronous and it | |
1041 | * also writes the superblock buffer to disk sector 0 immediately. | |
1042 | */ | |
1043 | int | |
1044 | xfs_sync_sb_buf( | |
1045 | struct xfs_mount *mp) | |
1046 | { | |
1047 | struct xfs_trans *tp; | |
89c2e711 | 1048 | struct xfs_buf *bp; |
f7664b31 ES |
1049 | int error; |
1050 | ||
1051 | error = xfs_trans_alloc(mp, &M_RES(mp)->tr_sb, 0, 0, 0, &tp); | |
1052 | if (error) | |
1053 | return error; | |
1054 | ||
8c9ce2f7 | 1055 | bp = xfs_trans_getsb(tp, mp); |
f7664b31 | 1056 | xfs_log_sb(tp); |
89c2e711 | 1057 | xfs_trans_bhold(tp, bp); |
f7664b31 ES |
1058 | xfs_trans_set_sync(tp); |
1059 | error = xfs_trans_commit(tp); | |
1060 | if (error) | |
1061 | goto out; | |
1062 | /* | |
1063 | * write out the sb buffer to get the changes to disk | |
1064 | */ | |
89c2e711 | 1065 | error = xfs_bwrite(bp); |
f7664b31 | 1066 | out: |
89c2e711 | 1067 | xfs_buf_relse(bp); |
f7664b31 ES |
1068 | return error; |
1069 | } | |
1070 | ||
91083269 | 1071 | void |
c368ebcd | 1072 | xfs_fs_geometry( |
ac503a4c DW |
1073 | struct xfs_sb *sbp, |
1074 | struct xfs_fsop_geom *geo, | |
1075 | int struct_version) | |
c368ebcd | 1076 | { |
ac503a4c DW |
1077 | memset(geo, 0, sizeof(struct xfs_fsop_geom)); |
1078 | ||
1079 | geo->blocksize = sbp->sb_blocksize; | |
1080 | geo->rtextsize = sbp->sb_rextsize; | |
1081 | geo->agblocks = sbp->sb_agblocks; | |
1082 | geo->agcount = sbp->sb_agcount; | |
1083 | geo->logblocks = sbp->sb_logblocks; | |
1084 | geo->sectsize = sbp->sb_sectsize; | |
1085 | geo->inodesize = sbp->sb_inodesize; | |
1086 | geo->imaxpct = sbp->sb_imax_pct; | |
1087 | geo->datablocks = sbp->sb_dblocks; | |
1088 | geo->rtblocks = sbp->sb_rblocks; | |
1089 | geo->rtextents = sbp->sb_rextents; | |
1090 | geo->logstart = sbp->sb_logstart; | |
1091 | BUILD_BUG_ON(sizeof(geo->uuid) != sizeof(sbp->sb_uuid)); | |
1092 | memcpy(geo->uuid, &sbp->sb_uuid, sizeof(sbp->sb_uuid)); | |
1093 | ||
1094 | if (struct_version < 2) | |
91083269 | 1095 | return; |
ac503a4c DW |
1096 | |
1097 | geo->sunit = sbp->sb_unit; | |
1098 | geo->swidth = sbp->sb_width; | |
1099 | ||
1100 | if (struct_version < 3) | |
91083269 | 1101 | return; |
ac503a4c DW |
1102 | |
1103 | geo->version = XFS_FSOP_GEOM_VERSION; | |
1104 | geo->flags = XFS_FSOP_GEOM_FLAGS_NLINK | | |
daa79bae CH |
1105 | XFS_FSOP_GEOM_FLAGS_DIRV2 | |
1106 | XFS_FSOP_GEOM_FLAGS_EXTFLG; | |
ac503a4c DW |
1107 | if (xfs_sb_version_hasattr(sbp)) |
1108 | geo->flags |= XFS_FSOP_GEOM_FLAGS_ATTR; | |
1109 | if (xfs_sb_version_hasquota(sbp)) | |
1110 | geo->flags |= XFS_FSOP_GEOM_FLAGS_QUOTA; | |
1111 | if (xfs_sb_version_hasalign(sbp)) | |
1112 | geo->flags |= XFS_FSOP_GEOM_FLAGS_IALIGN; | |
1113 | if (xfs_sb_version_hasdalign(sbp)) | |
1114 | geo->flags |= XFS_FSOP_GEOM_FLAGS_DALIGN; | |
ac503a4c DW |
1115 | if (xfs_sb_version_hassector(sbp)) |
1116 | geo->flags |= XFS_FSOP_GEOM_FLAGS_SECTOR; | |
1117 | if (xfs_sb_version_hasasciici(sbp)) | |
1118 | geo->flags |= XFS_FSOP_GEOM_FLAGS_DIRV2CI; | |
1119 | if (xfs_sb_version_haslazysbcount(sbp)) | |
1120 | geo->flags |= XFS_FSOP_GEOM_FLAGS_LAZYSB; | |
1121 | if (xfs_sb_version_hasattr2(sbp)) | |
1122 | geo->flags |= XFS_FSOP_GEOM_FLAGS_ATTR2; | |
1123 | if (xfs_sb_version_hasprojid32bit(sbp)) | |
1124 | geo->flags |= XFS_FSOP_GEOM_FLAGS_PROJID32; | |
1125 | if (xfs_sb_version_hascrc(sbp)) | |
1126 | geo->flags |= XFS_FSOP_GEOM_FLAGS_V5SB; | |
1127 | if (xfs_sb_version_hasftype(sbp)) | |
1128 | geo->flags |= XFS_FSOP_GEOM_FLAGS_FTYPE; | |
1129 | if (xfs_sb_version_hasfinobt(sbp)) | |
1130 | geo->flags |= XFS_FSOP_GEOM_FLAGS_FINOBT; | |
1131 | if (xfs_sb_version_hassparseinodes(sbp)) | |
1132 | geo->flags |= XFS_FSOP_GEOM_FLAGS_SPINODES; | |
1133 | if (xfs_sb_version_hasrmapbt(sbp)) | |
1134 | geo->flags |= XFS_FSOP_GEOM_FLAGS_RMAPBT; | |
1135 | if (xfs_sb_version_hasreflink(sbp)) | |
1136 | geo->flags |= XFS_FSOP_GEOM_FLAGS_REFLINK; | |
1137 | if (xfs_sb_version_hassector(sbp)) | |
1138 | geo->logsectsize = sbp->sb_logsectsize; | |
1139 | else | |
1140 | geo->logsectsize = BBSIZE; | |
1141 | geo->rtsectsize = sbp->sb_blocksize; | |
1142 | geo->dirblocksize = xfs_dir2_dirblock_bytes(sbp); | |
1143 | ||
a8789a5a | 1144 | if (struct_version < 4) |
91083269 | 1145 | return; |
ac503a4c DW |
1146 | |
1147 | if (xfs_sb_version_haslogv2(sbp)) | |
1148 | geo->flags |= XFS_FSOP_GEOM_FLAGS_LOGV2; | |
1149 | ||
1150 | geo->logsunit = sbp->sb_logsunit; | |
c368ebcd | 1151 | |
1b6d968d | 1152 | if (struct_version < 5) |
91083269 | 1153 | return; |
1b6d968d DC |
1154 | |
1155 | geo->version = XFS_FSOP_GEOM_VERSION_V5; | |
c368ebcd | 1156 | } |
689e11c8 DW |
1157 | |
1158 | /* Read a secondary superblock. */ | |
1159 | int | |
1160 | xfs_sb_read_secondary( | |
1161 | struct xfs_mount *mp, | |
1162 | struct xfs_trans *tp, | |
1163 | xfs_agnumber_t agno, | |
1164 | struct xfs_buf **bpp) | |
1165 | { | |
1166 | struct xfs_buf *bp; | |
1167 | int error; | |
1168 | ||
1169 | ASSERT(agno != 0 && agno != NULLAGNUMBER); | |
1170 | error = xfs_trans_read_buf(mp, tp, mp->m_ddev_targp, | |
1171 | XFS_AG_DADDR(mp, agno, XFS_SB_BLOCK(mp)), | |
1172 | XFS_FSS_TO_BB(mp, 1), 0, &bp, &xfs_sb_buf_ops); | |
1173 | if (error) | |
1174 | return error; | |
1175 | xfs_buf_set_ref(bp, XFS_SSB_REF); | |
1176 | *bpp = bp; | |
1177 | return 0; | |
1178 | } | |
d25522f1 DW |
1179 | |
1180 | /* Get an uninitialised secondary superblock buffer. */ | |
1181 | int | |
1182 | xfs_sb_get_secondary( | |
1183 | struct xfs_mount *mp, | |
1184 | struct xfs_trans *tp, | |
1185 | xfs_agnumber_t agno, | |
1186 | struct xfs_buf **bpp) | |
1187 | { | |
1188 | struct xfs_buf *bp; | |
ce92464c | 1189 | int error; |
d25522f1 DW |
1190 | |
1191 | ASSERT(agno != 0 && agno != NULLAGNUMBER); | |
ce92464c | 1192 | error = xfs_trans_get_buf(tp, mp->m_ddev_targp, |
d25522f1 | 1193 | XFS_AG_DADDR(mp, agno, XFS_SB_BLOCK(mp)), |
ce92464c DW |
1194 | XFS_FSS_TO_BB(mp, 1), 0, &bp); |
1195 | if (error) | |
1196 | return error; | |
d25522f1 DW |
1197 | bp->b_ops = &xfs_sb_buf_ops; |
1198 | xfs_buf_oneshot(bp); | |
1199 | *bpp = bp; | |
1200 | return 0; | |
1201 | } |