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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" | |
39353ff6 | 33 | #include "xfs_health.h" |
ff55068c DC |
34 | |
35 | /* | |
36 | * Physical superblock buffer manipulations. Shared with libxfs in userspace. | |
37 | */ | |
38 | ||
ff55068c DC |
39 | /* |
40 | * Reference counting access wrappers to the perag structures. | |
41 | * Because we never free per-ag structures, the only thing we | |
42 | * have to protect against changes is the tree structure itself. | |
43 | */ | |
44 | struct xfs_perag * | |
45 | xfs_perag_get( | |
46 | struct xfs_mount *mp, | |
47 | xfs_agnumber_t agno) | |
48 | { | |
49 | struct xfs_perag *pag; | |
50 | int ref = 0; | |
51 | ||
52 | rcu_read_lock(); | |
53 | pag = radix_tree_lookup(&mp->m_perag_tree, agno); | |
54 | if (pag) { | |
55 | ASSERT(atomic_read(&pag->pag_ref) >= 0); | |
56 | ref = atomic_inc_return(&pag->pag_ref); | |
57 | } | |
58 | rcu_read_unlock(); | |
59 | trace_xfs_perag_get(mp, agno, ref, _RET_IP_); | |
60 | return pag; | |
61 | } | |
62 | ||
63 | /* | |
64 | * search from @first to find the next perag with the given tag set. | |
65 | */ | |
66 | struct xfs_perag * | |
67 | xfs_perag_get_tag( | |
68 | struct xfs_mount *mp, | |
69 | xfs_agnumber_t first, | |
70 | int tag) | |
71 | { | |
72 | struct xfs_perag *pag; | |
73 | int found; | |
74 | int ref; | |
75 | ||
76 | rcu_read_lock(); | |
77 | found = radix_tree_gang_lookup_tag(&mp->m_perag_tree, | |
78 | (void **)&pag, first, 1, tag); | |
79 | if (found <= 0) { | |
80 | rcu_read_unlock(); | |
81 | return NULL; | |
82 | } | |
83 | ref = atomic_inc_return(&pag->pag_ref); | |
84 | rcu_read_unlock(); | |
85 | trace_xfs_perag_get_tag(mp, pag->pag_agno, ref, _RET_IP_); | |
86 | return pag; | |
87 | } | |
88 | ||
89 | void | |
90 | xfs_perag_put( | |
91 | struct xfs_perag *pag) | |
92 | { | |
93 | int ref; | |
94 | ||
95 | ASSERT(atomic_read(&pag->pag_ref) > 0); | |
96 | ref = atomic_dec_return(&pag->pag_ref); | |
97 | trace_xfs_perag_put(pag->pag_mount, pag->pag_agno, ref, _RET_IP_); | |
98 | } | |
99 | ||
eca383fc | 100 | /* Check all the superblock fields we care about when reading one in. */ |
ff55068c | 101 | STATIC int |
eca383fc DW |
102 | xfs_validate_sb_read( |
103 | struct xfs_mount *mp, | |
104 | struct xfs_sb *sbp) | |
ff55068c | 105 | { |
eca383fc DW |
106 | if (XFS_SB_VERSION_NUM(sbp) != XFS_SB_VERSION_5) |
107 | return 0; | |
ff55068c DC |
108 | |
109 | /* | |
eca383fc DW |
110 | * Version 5 superblock feature mask validation. Reject combinations |
111 | * the kernel cannot support up front before checking anything else. | |
ff55068c | 112 | */ |
eca383fc DW |
113 | if (xfs_sb_has_compat_feature(sbp, XFS_SB_FEAT_COMPAT_UNKNOWN)) { |
114 | xfs_warn(mp, | |
f41febd2 | 115 | "Superblock has unknown compatible features (0x%x) enabled.", |
eca383fc DW |
116 | (sbp->sb_features_compat & XFS_SB_FEAT_COMPAT_UNKNOWN)); |
117 | xfs_warn(mp, | |
f41febd2 | 118 | "Using a more recent kernel is recommended."); |
eca383fc | 119 | } |
ff55068c | 120 | |
eca383fc DW |
121 | if (xfs_sb_has_ro_compat_feature(sbp, XFS_SB_FEAT_RO_COMPAT_UNKNOWN)) { |
122 | xfs_alert(mp, | |
ff55068c | 123 | "Superblock has unknown read-only compatible features (0x%x) enabled.", |
eca383fc DW |
124 | (sbp->sb_features_ro_compat & |
125 | XFS_SB_FEAT_RO_COMPAT_UNKNOWN)); | |
126 | if (!(mp->m_flags & XFS_MOUNT_RDONLY)) { | |
127 | xfs_warn(mp, | |
f41febd2 | 128 | "Attempted to mount read-only compatible filesystem read-write."); |
eca383fc | 129 | xfs_warn(mp, |
ff55068c | 130 | "Filesystem can only be safely mounted read only."); |
f41febd2 | 131 | |
2451337d | 132 | return -EINVAL; |
ff55068c | 133 | } |
eca383fc DW |
134 | } |
135 | if (xfs_sb_has_incompat_feature(sbp, XFS_SB_FEAT_INCOMPAT_UNKNOWN)) { | |
136 | xfs_warn(mp, | |
137 | "Superblock has unknown incompatible features (0x%x) enabled.", | |
138 | (sbp->sb_features_incompat & | |
139 | XFS_SB_FEAT_INCOMPAT_UNKNOWN)); | |
140 | xfs_warn(mp, | |
141 | "Filesystem cannot be safely mounted by this kernel."); | |
142 | return -EINVAL; | |
143 | } | |
144 | ||
145 | return 0; | |
146 | } | |
147 | ||
148 | /* Check all the superblock fields we care about when writing one out. */ | |
149 | STATIC int | |
150 | xfs_validate_sb_write( | |
151 | struct xfs_mount *mp, | |
1f31c98d | 152 | struct xfs_buf *bp, |
eca383fc DW |
153 | struct xfs_sb *sbp) |
154 | { | |
8756a5af BD |
155 | /* |
156 | * Carry out additional sb summary counter sanity checks when we write | |
157 | * the superblock. We skip this in the read validator because there | |
158 | * could be newer superblocks in the log and if the values are garbage | |
69775fd1 | 159 | * even after replay we'll recalculate them at the end of log mount. |
1f31c98d DW |
160 | * |
161 | * mkfs has traditionally written zeroed counters to inprogress and | |
162 | * secondary superblocks, so allow this usage to continue because | |
163 | * we never read counters from such superblocks. | |
8756a5af | 164 | */ |
1f31c98d DW |
165 | if (XFS_BUF_ADDR(bp) == XFS_SB_DADDR && !sbp->sb_inprogress && |
166 | (sbp->sb_fdblocks > sbp->sb_dblocks || | |
167 | !xfs_verify_icount(mp, sbp->sb_icount) || | |
168 | sbp->sb_ifree > sbp->sb_icount)) { | |
8756a5af BD |
169 | xfs_warn(mp, "SB summary counter sanity check failed"); |
170 | return -EFSCORRUPTED; | |
171 | } | |
172 | ||
eca383fc DW |
173 | if (XFS_SB_VERSION_NUM(sbp) != XFS_SB_VERSION_5) |
174 | return 0; | |
175 | ||
9e037cb7 DW |
176 | /* |
177 | * Version 5 superblock feature mask validation. Reject combinations | |
178 | * the kernel cannot support since we checked for unsupported bits in | |
179 | * the read verifier, which means that memory is corrupt. | |
180 | */ | |
181 | if (xfs_sb_has_compat_feature(sbp, XFS_SB_FEAT_COMPAT_UNKNOWN)) { | |
182 | xfs_warn(mp, | |
183 | "Corruption detected in superblock compatible features (0x%x)!", | |
184 | (sbp->sb_features_compat & XFS_SB_FEAT_COMPAT_UNKNOWN)); | |
185 | return -EFSCORRUPTED; | |
186 | } | |
187 | ||
188 | if (xfs_sb_has_ro_compat_feature(sbp, XFS_SB_FEAT_RO_COMPAT_UNKNOWN)) { | |
189 | xfs_alert(mp, | |
190 | "Corruption detected in superblock read-only compatible features (0x%x)!", | |
191 | (sbp->sb_features_ro_compat & | |
192 | XFS_SB_FEAT_RO_COMPAT_UNKNOWN)); | |
193 | return -EFSCORRUPTED; | |
194 | } | |
195 | if (xfs_sb_has_incompat_feature(sbp, XFS_SB_FEAT_INCOMPAT_UNKNOWN)) { | |
196 | xfs_warn(mp, | |
197 | "Corruption detected in superblock incompatible features (0x%x)!", | |
198 | (sbp->sb_features_incompat & | |
199 | XFS_SB_FEAT_INCOMPAT_UNKNOWN)); | |
200 | return -EFSCORRUPTED; | |
201 | } | |
202 | if (xfs_sb_has_incompat_log_feature(sbp, | |
203 | XFS_SB_FEAT_INCOMPAT_LOG_UNKNOWN)) { | |
204 | xfs_warn(mp, | |
205 | "Corruption detected in superblock incompatible log features (0x%x)!", | |
206 | (sbp->sb_features_log_incompat & | |
207 | XFS_SB_FEAT_INCOMPAT_LOG_UNKNOWN)); | |
208 | return -EFSCORRUPTED; | |
209 | } | |
eca383fc DW |
210 | |
211 | /* | |
212 | * We can't read verify the sb LSN because the read verifier is called | |
213 | * before the log is allocated and processed. We know the log is set up | |
214 | * before write verifier calls, so check it here. | |
215 | */ | |
216 | if (!xfs_log_check_lsn(mp, sbp->sb_lsn)) | |
217 | return -EFSCORRUPTED; | |
218 | ||
219 | return 0; | |
220 | } | |
221 | ||
222 | /* Check the validity of the SB. */ | |
223 | STATIC int | |
224 | xfs_validate_sb_common( | |
225 | struct xfs_mount *mp, | |
226 | struct xfs_buf *bp, | |
227 | struct xfs_sb *sbp) | |
228 | { | |
e34d3e74 | 229 | struct xfs_dsb *dsb = XFS_BUF_TO_SBP(bp); |
eca383fc DW |
230 | uint32_t agcount = 0; |
231 | uint32_t rem; | |
232 | ||
39708c20 | 233 | if (!xfs_verify_magic(bp, dsb->sb_magicnum)) { |
eca383fc DW |
234 | xfs_warn(mp, "bad magic number"); |
235 | return -EWRONGFS; | |
236 | } | |
237 | ||
238 | if (!xfs_sb_good_version(sbp)) { | |
239 | xfs_warn(mp, "bad version"); | |
240 | return -EWRONGFS; | |
ff55068c DC |
241 | } |
242 | ||
243 | if (xfs_sb_version_has_pquotino(sbp)) { | |
244 | if (sbp->sb_qflags & (XFS_OQUOTA_ENFD | XFS_OQUOTA_CHKD)) { | |
245 | xfs_notice(mp, | |
08e96e1a | 246 | "Version 5 of Super block has XFS_OQUOTA bits."); |
2451337d | 247 | return -EFSCORRUPTED; |
ff55068c DC |
248 | } |
249 | } else if (sbp->sb_qflags & (XFS_PQUOTA_ENFD | XFS_GQUOTA_ENFD | | |
250 | XFS_PQUOTA_CHKD | XFS_GQUOTA_CHKD)) { | |
251 | xfs_notice(mp, | |
08e96e1a | 252 | "Superblock earlier than Version 5 has XFS_[PQ]UOTA_{ENFD|CHKD} bits."); |
2451337d | 253 | return -EFSCORRUPTED; |
ff55068c DC |
254 | } |
255 | ||
e5376fc1 BF |
256 | /* |
257 | * Full inode chunks must be aligned to inode chunk size when | |
258 | * sparse inodes are enabled to support the sparse chunk | |
259 | * allocation algorithm and prevent overlapping inode records. | |
260 | */ | |
261 | if (xfs_sb_version_hassparseinodes(sbp)) { | |
262 | uint32_t align; | |
263 | ||
e5376fc1 BF |
264 | align = XFS_INODES_PER_CHUNK * sbp->sb_inodesize |
265 | >> sbp->sb_blocklog; | |
266 | if (sbp->sb_inoalignmt != align) { | |
267 | xfs_warn(mp, | |
268 | "Inode block alignment (%u) must match chunk size (%u) for sparse inodes.", | |
269 | sbp->sb_inoalignmt, align); | |
270 | return -EINVAL; | |
271 | } | |
272 | } | |
273 | ||
ff55068c DC |
274 | if (unlikely( |
275 | sbp->sb_logstart == 0 && mp->m_logdev_targp == mp->m_ddev_targp)) { | |
276 | xfs_warn(mp, | |
277 | "filesystem is marked as having an external log; " | |
278 | "specify logdev on the mount command line."); | |
2451337d | 279 | return -EINVAL; |
ff55068c DC |
280 | } |
281 | ||
282 | if (unlikely( | |
283 | sbp->sb_logstart != 0 && mp->m_logdev_targp != mp->m_ddev_targp)) { | |
284 | xfs_warn(mp, | |
285 | "filesystem is marked as having an internal log; " | |
286 | "do not specify logdev on the mount command line."); | |
2451337d | 287 | return -EINVAL; |
ff55068c DC |
288 | } |
289 | ||
4bb73d01 DW |
290 | /* Compute agcount for this number of dblocks and agblocks */ |
291 | if (sbp->sb_agblocks) { | |
292 | agcount = div_u64_rem(sbp->sb_dblocks, sbp->sb_agblocks, &rem); | |
293 | if (rem) | |
294 | agcount++; | |
295 | } | |
296 | ||
ff55068c DC |
297 | /* |
298 | * More sanity checking. Most of these were stolen directly from | |
299 | * xfs_repair. | |
300 | */ | |
301 | if (unlikely( | |
302 | sbp->sb_agcount <= 0 || | |
303 | sbp->sb_sectsize < XFS_MIN_SECTORSIZE || | |
304 | sbp->sb_sectsize > XFS_MAX_SECTORSIZE || | |
305 | sbp->sb_sectlog < XFS_MIN_SECTORSIZE_LOG || | |
306 | sbp->sb_sectlog > XFS_MAX_SECTORSIZE_LOG || | |
307 | sbp->sb_sectsize != (1 << sbp->sb_sectlog) || | |
308 | sbp->sb_blocksize < XFS_MIN_BLOCKSIZE || | |
309 | sbp->sb_blocksize > XFS_MAX_BLOCKSIZE || | |
310 | sbp->sb_blocklog < XFS_MIN_BLOCKSIZE_LOG || | |
311 | sbp->sb_blocklog > XFS_MAX_BLOCKSIZE_LOG || | |
312 | sbp->sb_blocksize != (1 << sbp->sb_blocklog) || | |
83d230eb | 313 | sbp->sb_dirblklog + sbp->sb_blocklog > XFS_MAX_BLOCKSIZE_LOG || |
ff55068c DC |
314 | sbp->sb_inodesize < XFS_DINODE_MIN_SIZE || |
315 | sbp->sb_inodesize > XFS_DINODE_MAX_SIZE || | |
316 | sbp->sb_inodelog < XFS_DINODE_MIN_LOG || | |
317 | sbp->sb_inodelog > XFS_DINODE_MAX_LOG || | |
318 | sbp->sb_inodesize != (1 << sbp->sb_inodelog) || | |
e1b05723 | 319 | sbp->sb_logsunit > XLOG_MAX_RECORD_BSIZE || |
392c6de9 | 320 | sbp->sb_inopblock != howmany(sbp->sb_blocksize,sbp->sb_inodesize) || |
4bb73d01 DW |
321 | XFS_FSB_TO_B(mp, sbp->sb_agblocks) < XFS_MIN_AG_BYTES || |
322 | XFS_FSB_TO_B(mp, sbp->sb_agblocks) > XFS_MAX_AG_BYTES || | |
323 | sbp->sb_agblklog != xfs_highbit32(sbp->sb_agblocks - 1) + 1 || | |
324 | agcount == 0 || agcount != sbp->sb_agcount || | |
ff55068c DC |
325 | (sbp->sb_blocklog - sbp->sb_inodelog != sbp->sb_inopblog) || |
326 | (sbp->sb_rextsize * sbp->sb_blocksize > XFS_MAX_RTEXTSIZE) || | |
327 | (sbp->sb_rextsize * sbp->sb_blocksize < XFS_MIN_RTEXTSIZE) || | |
328 | (sbp->sb_imax_pct > 100 /* zero sb_imax_pct is valid */) || | |
329 | sbp->sb_dblocks == 0 || | |
330 | sbp->sb_dblocks > XFS_MAX_DBLOCKS(sbp) || | |
ab3e57b5 DC |
331 | sbp->sb_dblocks < XFS_MIN_DBLOCKS(sbp) || |
332 | sbp->sb_shared_vn != 0)) { | |
5ef11eb0 | 333 | xfs_notice(mp, "SB sanity check failed"); |
2451337d | 334 | return -EFSCORRUPTED; |
bec9d48d DW |
335 | } |
336 | ||
fa4ca9c5 DC |
337 | if (sbp->sb_unit) { |
338 | if (!xfs_sb_version_hasdalign(sbp) || | |
339 | sbp->sb_unit > sbp->sb_width || | |
340 | (sbp->sb_width % sbp->sb_unit) != 0) { | |
341 | xfs_notice(mp, "SB stripe unit sanity check failed"); | |
342 | return -EFSCORRUPTED; | |
343 | } | |
344 | } else if (xfs_sb_version_hasdalign(sbp)) { | |
345 | xfs_notice(mp, "SB stripe alignment sanity check failed"); | |
346 | return -EFSCORRUPTED; | |
347 | } else if (sbp->sb_width) { | |
348 | xfs_notice(mp, "SB stripe width sanity check failed"); | |
349 | return -EFSCORRUPTED; | |
350 | } | |
351 | ||
352 | ||
bec9d48d DW |
353 | if (xfs_sb_version_hascrc(&mp->m_sb) && |
354 | sbp->sb_blocksize < XFS_MIN_CRC_BLOCKSIZE) { | |
355 | xfs_notice(mp, "v5 SB sanity check failed"); | |
356 | return -EFSCORRUPTED; | |
ff55068c DC |
357 | } |
358 | ||
359 | /* | |
360 | * Until this is fixed only page-sized or smaller data blocks work. | |
361 | */ | |
362 | if (unlikely(sbp->sb_blocksize > PAGE_SIZE)) { | |
363 | xfs_warn(mp, | |
364 | "File system with blocksize %d bytes. " | |
365 | "Only pagesize (%ld) or less will currently work.", | |
366 | sbp->sb_blocksize, PAGE_SIZE); | |
2451337d | 367 | return -ENOSYS; |
ff55068c DC |
368 | } |
369 | ||
370 | /* | |
371 | * Currently only very few inode sizes are supported. | |
372 | */ | |
373 | switch (sbp->sb_inodesize) { | |
374 | case 256: | |
375 | case 512: | |
376 | case 1024: | |
377 | case 2048: | |
378 | break; | |
379 | default: | |
380 | xfs_warn(mp, "inode size of %d bytes not supported", | |
381 | sbp->sb_inodesize); | |
2451337d | 382 | return -ENOSYS; |
ff55068c DC |
383 | } |
384 | ||
385 | if (xfs_sb_validate_fsb_count(sbp, sbp->sb_dblocks) || | |
386 | xfs_sb_validate_fsb_count(sbp, sbp->sb_rblocks)) { | |
387 | xfs_warn(mp, | |
388 | "file system too large to be mounted on this system."); | |
2451337d | 389 | return -EFBIG; |
ff55068c DC |
390 | } |
391 | ||
eca383fc DW |
392 | /* |
393 | * Don't touch the filesystem if a user tool thinks it owns the primary | |
394 | * superblock. mkfs doesn't clear the flag from secondary supers, so | |
395 | * we don't check them at all. | |
396 | */ | |
397 | if (XFS_BUF_ADDR(bp) == XFS_SB_DADDR && sbp->sb_inprogress) { | |
ff55068c | 398 | xfs_warn(mp, "Offline file system operation in progress!"); |
2451337d | 399 | return -EFSCORRUPTED; |
ff55068c | 400 | } |
ff55068c DC |
401 | return 0; |
402 | } | |
403 | ||
404 | void | |
405 | xfs_sb_quota_from_disk(struct xfs_sb *sbp) | |
406 | { | |
407 | /* | |
408 | * older mkfs doesn't initialize quota inodes to NULLFSINO. This | |
409 | * leads to in-core values having two different values for a quota | |
410 | * inode to be invalid: 0 and NULLFSINO. Change it to a single value | |
411 | * NULLFSINO. | |
412 | * | |
413 | * Note that this change affect only the in-core values. These | |
414 | * values are not written back to disk unless any quota information | |
415 | * is written to the disk. Even in that case, sb_pquotino field is | |
416 | * not written to disk unless the superblock supports pquotino. | |
417 | */ | |
418 | if (sbp->sb_uquotino == 0) | |
419 | sbp->sb_uquotino = NULLFSINO; | |
420 | if (sbp->sb_gquotino == 0) | |
421 | sbp->sb_gquotino = NULLFSINO; | |
422 | if (sbp->sb_pquotino == 0) | |
423 | sbp->sb_pquotino = NULLFSINO; | |
424 | ||
425 | /* | |
426 | * We need to do these manipilations only if we are working | |
427 | * with an older version of on-disk superblock. | |
428 | */ | |
429 | if (xfs_sb_version_has_pquotino(sbp)) | |
430 | return; | |
431 | ||
432 | if (sbp->sb_qflags & XFS_OQUOTA_ENFD) | |
433 | sbp->sb_qflags |= (sbp->sb_qflags & XFS_PQUOTA_ACCT) ? | |
434 | XFS_PQUOTA_ENFD : XFS_GQUOTA_ENFD; | |
435 | if (sbp->sb_qflags & XFS_OQUOTA_CHKD) | |
436 | sbp->sb_qflags |= (sbp->sb_qflags & XFS_PQUOTA_ACCT) ? | |
437 | XFS_PQUOTA_CHKD : XFS_GQUOTA_CHKD; | |
438 | sbp->sb_qflags &= ~(XFS_OQUOTA_ENFD | XFS_OQUOTA_CHKD); | |
439 | ||
e6fc6fcf ES |
440 | if (sbp->sb_qflags & XFS_PQUOTA_ACCT && |
441 | sbp->sb_gquotino != NULLFSINO) { | |
ff55068c DC |
442 | /* |
443 | * In older version of superblock, on-disk superblock only | |
444 | * has sb_gquotino, and in-core superblock has both sb_gquotino | |
445 | * and sb_pquotino. But, only one of them is supported at any | |
446 | * point of time. So, if PQUOTA is set in disk superblock, | |
e6fc6fcf ES |
447 | * copy over sb_gquotino to sb_pquotino. The NULLFSINO test |
448 | * above is to make sure we don't do this twice and wipe them | |
449 | * both out! | |
ff55068c DC |
450 | */ |
451 | sbp->sb_pquotino = sbp->sb_gquotino; | |
452 | sbp->sb_gquotino = NULLFSINO; | |
453 | } | |
454 | } | |
455 | ||
5ef828c4 ES |
456 | static void |
457 | __xfs_sb_from_disk( | |
ff55068c | 458 | struct xfs_sb *to, |
5ef828c4 ES |
459 | xfs_dsb_t *from, |
460 | bool convert_xquota) | |
ff55068c DC |
461 | { |
462 | to->sb_magicnum = be32_to_cpu(from->sb_magicnum); | |
463 | to->sb_blocksize = be32_to_cpu(from->sb_blocksize); | |
464 | to->sb_dblocks = be64_to_cpu(from->sb_dblocks); | |
465 | to->sb_rblocks = be64_to_cpu(from->sb_rblocks); | |
466 | to->sb_rextents = be64_to_cpu(from->sb_rextents); | |
467 | memcpy(&to->sb_uuid, &from->sb_uuid, sizeof(to->sb_uuid)); | |
468 | to->sb_logstart = be64_to_cpu(from->sb_logstart); | |
469 | to->sb_rootino = be64_to_cpu(from->sb_rootino); | |
470 | to->sb_rbmino = be64_to_cpu(from->sb_rbmino); | |
471 | to->sb_rsumino = be64_to_cpu(from->sb_rsumino); | |
472 | to->sb_rextsize = be32_to_cpu(from->sb_rextsize); | |
473 | to->sb_agblocks = be32_to_cpu(from->sb_agblocks); | |
474 | to->sb_agcount = be32_to_cpu(from->sb_agcount); | |
475 | to->sb_rbmblocks = be32_to_cpu(from->sb_rbmblocks); | |
476 | to->sb_logblocks = be32_to_cpu(from->sb_logblocks); | |
477 | to->sb_versionnum = be16_to_cpu(from->sb_versionnum); | |
478 | to->sb_sectsize = be16_to_cpu(from->sb_sectsize); | |
479 | to->sb_inodesize = be16_to_cpu(from->sb_inodesize); | |
480 | to->sb_inopblock = be16_to_cpu(from->sb_inopblock); | |
481 | memcpy(&to->sb_fname, &from->sb_fname, sizeof(to->sb_fname)); | |
482 | to->sb_blocklog = from->sb_blocklog; | |
483 | to->sb_sectlog = from->sb_sectlog; | |
484 | to->sb_inodelog = from->sb_inodelog; | |
485 | to->sb_inopblog = from->sb_inopblog; | |
486 | to->sb_agblklog = from->sb_agblklog; | |
487 | to->sb_rextslog = from->sb_rextslog; | |
488 | to->sb_inprogress = from->sb_inprogress; | |
489 | to->sb_imax_pct = from->sb_imax_pct; | |
490 | to->sb_icount = be64_to_cpu(from->sb_icount); | |
491 | to->sb_ifree = be64_to_cpu(from->sb_ifree); | |
492 | to->sb_fdblocks = be64_to_cpu(from->sb_fdblocks); | |
493 | to->sb_frextents = be64_to_cpu(from->sb_frextents); | |
494 | to->sb_uquotino = be64_to_cpu(from->sb_uquotino); | |
495 | to->sb_gquotino = be64_to_cpu(from->sb_gquotino); | |
496 | to->sb_qflags = be16_to_cpu(from->sb_qflags); | |
497 | to->sb_flags = from->sb_flags; | |
498 | to->sb_shared_vn = from->sb_shared_vn; | |
499 | to->sb_inoalignmt = be32_to_cpu(from->sb_inoalignmt); | |
500 | to->sb_unit = be32_to_cpu(from->sb_unit); | |
501 | to->sb_width = be32_to_cpu(from->sb_width); | |
502 | to->sb_dirblklog = from->sb_dirblklog; | |
503 | to->sb_logsectlog = from->sb_logsectlog; | |
504 | to->sb_logsectsize = be16_to_cpu(from->sb_logsectsize); | |
505 | to->sb_logsunit = be32_to_cpu(from->sb_logsunit); | |
506 | to->sb_features2 = be32_to_cpu(from->sb_features2); | |
507 | to->sb_bad_features2 = be32_to_cpu(from->sb_bad_features2); | |
508 | to->sb_features_compat = be32_to_cpu(from->sb_features_compat); | |
509 | to->sb_features_ro_compat = be32_to_cpu(from->sb_features_ro_compat); | |
510 | to->sb_features_incompat = be32_to_cpu(from->sb_features_incompat); | |
511 | to->sb_features_log_incompat = | |
512 | be32_to_cpu(from->sb_features_log_incompat); | |
04dd1a0d ES |
513 | /* crc is only used on disk, not in memory; just init to 0 here. */ |
514 | to->sb_crc = 0; | |
fb4f2b4e | 515 | to->sb_spino_align = be32_to_cpu(from->sb_spino_align); |
ff55068c DC |
516 | to->sb_pquotino = be64_to_cpu(from->sb_pquotino); |
517 | to->sb_lsn = be64_to_cpu(from->sb_lsn); | |
ce748eaa ES |
518 | /* |
519 | * sb_meta_uuid is only on disk if it differs from sb_uuid and the | |
520 | * feature flag is set; if not set we keep it only in memory. | |
521 | */ | |
522 | if (xfs_sb_version_hasmetauuid(to)) | |
523 | uuid_copy(&to->sb_meta_uuid, &from->sb_meta_uuid); | |
524 | else | |
525 | uuid_copy(&to->sb_meta_uuid, &from->sb_uuid); | |
5ef828c4 ES |
526 | /* Convert on-disk flags to in-memory flags? */ |
527 | if (convert_xquota) | |
528 | xfs_sb_quota_from_disk(to); | |
529 | } | |
530 | ||
531 | void | |
532 | xfs_sb_from_disk( | |
533 | struct xfs_sb *to, | |
534 | xfs_dsb_t *from) | |
535 | { | |
536 | __xfs_sb_from_disk(to, from, true); | |
ff55068c DC |
537 | } |
538 | ||
4d11a402 | 539 | static void |
ff55068c | 540 | xfs_sb_quota_to_disk( |
4d11a402 DC |
541 | struct xfs_dsb *to, |
542 | struct xfs_sb *from) | |
ff55068c | 543 | { |
c8ce540d | 544 | uint16_t qflags = from->sb_qflags; |
ff55068c | 545 | |
4d11a402 DC |
546 | to->sb_uquotino = cpu_to_be64(from->sb_uquotino); |
547 | if (xfs_sb_version_has_pquotino(from)) { | |
548 | to->sb_qflags = cpu_to_be16(from->sb_qflags); | |
549 | to->sb_gquotino = cpu_to_be64(from->sb_gquotino); | |
550 | to->sb_pquotino = cpu_to_be64(from->sb_pquotino); | |
551 | return; | |
552 | } | |
553 | ||
ff55068c | 554 | /* |
4d11a402 DC |
555 | * The in-core version of sb_qflags do not have XFS_OQUOTA_* |
556 | * flags, whereas the on-disk version does. So, convert incore | |
557 | * XFS_{PG}QUOTA_* flags to on-disk XFS_OQUOTA_* flags. | |
ff55068c | 558 | */ |
4d11a402 DC |
559 | qflags &= ~(XFS_PQUOTA_ENFD | XFS_PQUOTA_CHKD | |
560 | XFS_GQUOTA_ENFD | XFS_GQUOTA_CHKD); | |
ff55068c | 561 | |
4d11a402 DC |
562 | if (from->sb_qflags & |
563 | (XFS_PQUOTA_ENFD | XFS_GQUOTA_ENFD)) | |
564 | qflags |= XFS_OQUOTA_ENFD; | |
565 | if (from->sb_qflags & | |
566 | (XFS_PQUOTA_CHKD | XFS_GQUOTA_CHKD)) | |
567 | qflags |= XFS_OQUOTA_CHKD; | |
568 | to->sb_qflags = cpu_to_be16(qflags); | |
ff55068c DC |
569 | |
570 | /* | |
4d11a402 DC |
571 | * GQUOTINO and PQUOTINO cannot be used together in versions |
572 | * of superblock that do not have pquotino. from->sb_flags | |
573 | * tells us which quota is active and should be copied to | |
574 | * disk. If neither are active, we should NULL the inode. | |
03e01349 | 575 | * |
4d11a402 DC |
576 | * In all cases, the separate pquotino must remain 0 because it |
577 | * it beyond the "end" of the valid non-pquotino superblock. | |
ff55068c | 578 | */ |
4d11a402 | 579 | if (from->sb_qflags & XFS_GQUOTA_ACCT) |
ff55068c | 580 | to->sb_gquotino = cpu_to_be64(from->sb_gquotino); |
4d11a402 | 581 | else if (from->sb_qflags & XFS_PQUOTA_ACCT) |
ff55068c | 582 | to->sb_gquotino = cpu_to_be64(from->sb_pquotino); |
03e01349 DC |
583 | else { |
584 | /* | |
585 | * We can't rely on just the fields being logged to tell us | |
586 | * that it is safe to write NULLFSINO - we should only do that | |
587 | * if quotas are not actually enabled. Hence only write | |
588 | * NULLFSINO if both in-core quota inodes are NULL. | |
589 | */ | |
590 | if (from->sb_gquotino == NULLFSINO && | |
591 | from->sb_pquotino == NULLFSINO) | |
592 | to->sb_gquotino = cpu_to_be64(NULLFSINO); | |
593 | } | |
ff55068c | 594 | |
4d11a402 | 595 | to->sb_pquotino = 0; |
ff55068c DC |
596 | } |
597 | ||
ff55068c DC |
598 | void |
599 | xfs_sb_to_disk( | |
4d11a402 DC |
600 | struct xfs_dsb *to, |
601 | struct xfs_sb *from) | |
ff55068c | 602 | { |
4d11a402 DC |
603 | xfs_sb_quota_to_disk(to, from); |
604 | ||
605 | to->sb_magicnum = cpu_to_be32(from->sb_magicnum); | |
606 | to->sb_blocksize = cpu_to_be32(from->sb_blocksize); | |
607 | to->sb_dblocks = cpu_to_be64(from->sb_dblocks); | |
608 | to->sb_rblocks = cpu_to_be64(from->sb_rblocks); | |
609 | to->sb_rextents = cpu_to_be64(from->sb_rextents); | |
610 | memcpy(&to->sb_uuid, &from->sb_uuid, sizeof(to->sb_uuid)); | |
611 | to->sb_logstart = cpu_to_be64(from->sb_logstart); | |
612 | to->sb_rootino = cpu_to_be64(from->sb_rootino); | |
613 | to->sb_rbmino = cpu_to_be64(from->sb_rbmino); | |
614 | to->sb_rsumino = cpu_to_be64(from->sb_rsumino); | |
615 | to->sb_rextsize = cpu_to_be32(from->sb_rextsize); | |
616 | to->sb_agblocks = cpu_to_be32(from->sb_agblocks); | |
617 | to->sb_agcount = cpu_to_be32(from->sb_agcount); | |
618 | to->sb_rbmblocks = cpu_to_be32(from->sb_rbmblocks); | |
619 | to->sb_logblocks = cpu_to_be32(from->sb_logblocks); | |
620 | to->sb_versionnum = cpu_to_be16(from->sb_versionnum); | |
621 | to->sb_sectsize = cpu_to_be16(from->sb_sectsize); | |
622 | to->sb_inodesize = cpu_to_be16(from->sb_inodesize); | |
623 | to->sb_inopblock = cpu_to_be16(from->sb_inopblock); | |
624 | memcpy(&to->sb_fname, &from->sb_fname, sizeof(to->sb_fname)); | |
625 | to->sb_blocklog = from->sb_blocklog; | |
626 | to->sb_sectlog = from->sb_sectlog; | |
627 | to->sb_inodelog = from->sb_inodelog; | |
628 | to->sb_inopblog = from->sb_inopblog; | |
629 | to->sb_agblklog = from->sb_agblklog; | |
630 | to->sb_rextslog = from->sb_rextslog; | |
631 | to->sb_inprogress = from->sb_inprogress; | |
632 | to->sb_imax_pct = from->sb_imax_pct; | |
633 | to->sb_icount = cpu_to_be64(from->sb_icount); | |
634 | to->sb_ifree = cpu_to_be64(from->sb_ifree); | |
635 | to->sb_fdblocks = cpu_to_be64(from->sb_fdblocks); | |
636 | to->sb_frextents = cpu_to_be64(from->sb_frextents); | |
ff55068c | 637 | |
4d11a402 DC |
638 | to->sb_flags = from->sb_flags; |
639 | to->sb_shared_vn = from->sb_shared_vn; | |
640 | to->sb_inoalignmt = cpu_to_be32(from->sb_inoalignmt); | |
641 | to->sb_unit = cpu_to_be32(from->sb_unit); | |
642 | to->sb_width = cpu_to_be32(from->sb_width); | |
643 | to->sb_dirblklog = from->sb_dirblklog; | |
644 | to->sb_logsectlog = from->sb_logsectlog; | |
645 | to->sb_logsectsize = cpu_to_be16(from->sb_logsectsize); | |
646 | to->sb_logsunit = cpu_to_be32(from->sb_logsunit); | |
074e427b DC |
647 | |
648 | /* | |
649 | * We need to ensure that bad_features2 always matches features2. | |
650 | * Hence we enforce that here rather than having to remember to do it | |
651 | * everywhere else that updates features2. | |
652 | */ | |
653 | from->sb_bad_features2 = from->sb_features2; | |
4d11a402 DC |
654 | to->sb_features2 = cpu_to_be32(from->sb_features2); |
655 | to->sb_bad_features2 = cpu_to_be32(from->sb_bad_features2); | |
656 | ||
657 | if (xfs_sb_version_hascrc(from)) { | |
658 | to->sb_features_compat = cpu_to_be32(from->sb_features_compat); | |
659 | to->sb_features_ro_compat = | |
660 | cpu_to_be32(from->sb_features_ro_compat); | |
661 | to->sb_features_incompat = | |
662 | cpu_to_be32(from->sb_features_incompat); | |
663 | to->sb_features_log_incompat = | |
664 | cpu_to_be32(from->sb_features_log_incompat); | |
fb4f2b4e | 665 | to->sb_spino_align = cpu_to_be32(from->sb_spino_align); |
4d11a402 | 666 | to->sb_lsn = cpu_to_be64(from->sb_lsn); |
ce748eaa ES |
667 | if (xfs_sb_version_hasmetauuid(from)) |
668 | uuid_copy(&to->sb_meta_uuid, &from->sb_meta_uuid); | |
ff55068c DC |
669 | } |
670 | } | |
671 | ||
ff55068c DC |
672 | /* |
673 | * If the superblock has the CRC feature bit set or the CRC field is non-null, | |
674 | * check that the CRC is valid. We check the CRC field is non-null because a | |
675 | * single bit error could clear the feature bit and unused parts of the | |
676 | * superblock are supposed to be zero. Hence a non-null crc field indicates that | |
677 | * we've potentially lost a feature bit and we should check it anyway. | |
10e6e65d ES |
678 | * |
679 | * However, past bugs (i.e. in growfs) left non-zeroed regions beyond the | |
680 | * last field in V4 secondary superblocks. So for secondary superblocks, | |
681 | * we are more forgiving, and ignore CRC failures if the primary doesn't | |
682 | * indicate that the fs version is V5. | |
ff55068c DC |
683 | */ |
684 | static void | |
685 | xfs_sb_read_verify( | |
eca383fc | 686 | struct xfs_buf *bp) |
ff55068c | 687 | { |
eca383fc DW |
688 | struct xfs_sb sb; |
689 | struct xfs_mount *mp = bp->b_target->bt_mount; | |
690 | struct xfs_dsb *dsb = XFS_BUF_TO_SBP(bp); | |
691 | int error; | |
ff55068c DC |
692 | |
693 | /* | |
694 | * open code the version check to avoid needing to convert the entire | |
695 | * superblock from disk order just to check the version number | |
696 | */ | |
697 | if (dsb->sb_magicnum == cpu_to_be32(XFS_SB_MAGIC) && | |
698 | (((be16_to_cpu(dsb->sb_versionnum) & XFS_SB_VERSION_NUMBITS) == | |
699 | XFS_SB_VERSION_5) || | |
700 | dsb->sb_crc != 0)) { | |
701 | ||
51582170 | 702 | if (!xfs_buf_verify_cksum(bp, XFS_SB_CRC_OFF)) { |
10e6e65d | 703 | /* Only fail bad secondaries on a known V5 filesystem */ |
7a01e707 | 704 | if (bp->b_bn == XFS_SB_DADDR || |
10e6e65d | 705 | xfs_sb_version_hascrc(&mp->m_sb)) { |
2451337d | 706 | error = -EFSBADCRC; |
10e6e65d ES |
707 | goto out_error; |
708 | } | |
ff55068c DC |
709 | } |
710 | } | |
eca383fc DW |
711 | |
712 | /* | |
713 | * Check all the superblock fields. Don't byteswap the xquota flags | |
714 | * because _verify_common checks the on-disk values. | |
715 | */ | |
716 | __xfs_sb_from_disk(&sb, XFS_BUF_TO_SBP(bp), false); | |
717 | error = xfs_validate_sb_common(mp, bp, &sb); | |
718 | if (error) | |
719 | goto out_error; | |
720 | error = xfs_validate_sb_read(mp, &sb); | |
ff55068c DC |
721 | |
722 | out_error: | |
31ca03c9 | 723 | if (error == -EFSCORRUPTED || error == -EFSBADCRC) |
bc1a09b8 | 724 | xfs_verifier_error(bp, error, __this_address); |
31ca03c9 | 725 | else if (error) |
ff55068c | 726 | xfs_buf_ioerror(bp, error); |
ff55068c DC |
727 | } |
728 | ||
729 | /* | |
730 | * We may be probed for a filesystem match, so we may not want to emit | |
731 | * messages when the superblock buffer is not actually an XFS superblock. | |
2533787a | 732 | * If we find an XFS superblock, then run a normal, noisy mount because we are |
ff55068c DC |
733 | * really going to mount it and want to know about errors. |
734 | */ | |
735 | static void | |
736 | xfs_sb_quiet_read_verify( | |
737 | struct xfs_buf *bp) | |
738 | { | |
739 | struct xfs_dsb *dsb = XFS_BUF_TO_SBP(bp); | |
740 | ||
ff55068c DC |
741 | if (dsb->sb_magicnum == cpu_to_be32(XFS_SB_MAGIC)) { |
742 | /* XFS filesystem, verify noisily! */ | |
743 | xfs_sb_read_verify(bp); | |
744 | return; | |
745 | } | |
746 | /* quietly fail */ | |
2451337d | 747 | xfs_buf_ioerror(bp, -EWRONGFS); |
ff55068c DC |
748 | } |
749 | ||
750 | static void | |
751 | xfs_sb_write_verify( | |
752 | struct xfs_buf *bp) | |
753 | { | |
eca383fc | 754 | struct xfs_sb sb; |
ff55068c | 755 | struct xfs_mount *mp = bp->b_target->bt_mount; |
fb1755a6 | 756 | struct xfs_buf_log_item *bip = bp->b_log_item; |
ff55068c DC |
757 | int error; |
758 | ||
eca383fc DW |
759 | /* |
760 | * Check all the superblock fields. Don't byteswap the xquota flags | |
761 | * because _verify_common checks the on-disk values. | |
762 | */ | |
763 | __xfs_sb_from_disk(&sb, XFS_BUF_TO_SBP(bp), false); | |
764 | error = xfs_validate_sb_common(mp, bp, &sb); | |
765 | if (error) | |
766 | goto out_error; | |
1f31c98d | 767 | error = xfs_validate_sb_write(mp, bp, &sb); |
eca383fc DW |
768 | if (error) |
769 | goto out_error; | |
ff55068c DC |
770 | |
771 | if (!xfs_sb_version_hascrc(&mp->m_sb)) | |
772 | return; | |
773 | ||
774 | if (bip) | |
775 | XFS_BUF_TO_SBP(bp)->sb_lsn = cpu_to_be64(bip->bli_item.li_lsn); | |
776 | ||
f1dbcd7e | 777 | xfs_buf_update_cksum(bp, XFS_SB_CRC_OFF); |
eca383fc DW |
778 | return; |
779 | ||
780 | out_error: | |
781 | xfs_verifier_error(bp, error, __this_address); | |
ff55068c DC |
782 | } |
783 | ||
784 | const struct xfs_buf_ops xfs_sb_buf_ops = { | |
233135b7 | 785 | .name = "xfs_sb", |
39708c20 | 786 | .magic = { cpu_to_be32(XFS_SB_MAGIC), cpu_to_be32(XFS_SB_MAGIC) }, |
ff55068c DC |
787 | .verify_read = xfs_sb_read_verify, |
788 | .verify_write = xfs_sb_write_verify, | |
789 | }; | |
790 | ||
791 | const struct xfs_buf_ops xfs_sb_quiet_buf_ops = { | |
233135b7 | 792 | .name = "xfs_sb_quiet", |
39708c20 | 793 | .magic = { cpu_to_be32(XFS_SB_MAGIC), cpu_to_be32(XFS_SB_MAGIC) }, |
ff55068c DC |
794 | .verify_read = xfs_sb_quiet_read_verify, |
795 | .verify_write = xfs_sb_write_verify, | |
796 | }; | |
797 | ||
798 | /* | |
799 | * xfs_mount_common | |
800 | * | |
801 | * Mount initialization code establishing various mount | |
802 | * fields from the superblock associated with the given | |
803 | * mount structure | |
804 | */ | |
805 | void | |
806 | xfs_sb_mount_common( | |
807 | struct xfs_mount *mp, | |
808 | struct xfs_sb *sbp) | |
809 | { | |
810 | mp->m_agfrotor = mp->m_agirotor = 0; | |
ff55068c DC |
811 | mp->m_maxagi = mp->m_sb.sb_agcount; |
812 | mp->m_blkbit_log = sbp->sb_blocklog + XFS_NBBYLOG; | |
813 | mp->m_blkbb_log = sbp->sb_blocklog - BBSHIFT; | |
814 | mp->m_sectbb_log = sbp->sb_sectlog - BBSHIFT; | |
815 | mp->m_agno_log = xfs_highbit32(sbp->sb_agcount - 1) + 1; | |
816 | mp->m_agino_log = sbp->sb_inopblog + sbp->sb_agblklog; | |
817 | mp->m_blockmask = sbp->sb_blocksize - 1; | |
818 | mp->m_blockwsize = sbp->sb_blocksize >> XFS_WORDLOG; | |
819 | mp->m_blockwmask = mp->m_blockwsize - 1; | |
820 | ||
821 | mp->m_alloc_mxr[0] = xfs_allocbt_maxrecs(mp, sbp->sb_blocksize, 1); | |
822 | mp->m_alloc_mxr[1] = xfs_allocbt_maxrecs(mp, sbp->sb_blocksize, 0); | |
823 | mp->m_alloc_mnr[0] = mp->m_alloc_mxr[0] / 2; | |
824 | mp->m_alloc_mnr[1] = mp->m_alloc_mxr[1] / 2; | |
825 | ||
826 | mp->m_inobt_mxr[0] = xfs_inobt_maxrecs(mp, sbp->sb_blocksize, 1); | |
827 | mp->m_inobt_mxr[1] = xfs_inobt_maxrecs(mp, sbp->sb_blocksize, 0); | |
828 | mp->m_inobt_mnr[0] = mp->m_inobt_mxr[0] / 2; | |
829 | mp->m_inobt_mnr[1] = mp->m_inobt_mxr[1] / 2; | |
830 | ||
831 | mp->m_bmap_dmxr[0] = xfs_bmbt_maxrecs(mp, sbp->sb_blocksize, 1); | |
832 | mp->m_bmap_dmxr[1] = xfs_bmbt_maxrecs(mp, sbp->sb_blocksize, 0); | |
833 | mp->m_bmap_dmnr[0] = mp->m_bmap_dmxr[0] / 2; | |
834 | mp->m_bmap_dmnr[1] = mp->m_bmap_dmxr[1] / 2; | |
835 | ||
a1f69417 ES |
836 | mp->m_rmap_mxr[0] = xfs_rmapbt_maxrecs(sbp->sb_blocksize, 1); |
837 | mp->m_rmap_mxr[1] = xfs_rmapbt_maxrecs(sbp->sb_blocksize, 0); | |
035e00ac DW |
838 | mp->m_rmap_mnr[0] = mp->m_rmap_mxr[0] / 2; |
839 | mp->m_rmap_mnr[1] = mp->m_rmap_mxr[1] / 2; | |
840 | ||
a1f69417 ES |
841 | mp->m_refc_mxr[0] = xfs_refcountbt_maxrecs(sbp->sb_blocksize, true); |
842 | mp->m_refc_mxr[1] = xfs_refcountbt_maxrecs(sbp->sb_blocksize, false); | |
1946b91c DW |
843 | mp->m_refc_mnr[0] = mp->m_refc_mxr[0] / 2; |
844 | mp->m_refc_mnr[1] = mp->m_refc_mxr[1] / 2; | |
845 | ||
ff55068c | 846 | mp->m_bsize = XFS_FSB_TO_BB(mp, 1); |
9bb54cb5 | 847 | mp->m_ialloc_inos = max_t(uint16_t, XFS_INODES_PER_CHUNK, |
ff55068c DC |
848 | sbp->sb_inopblock); |
849 | mp->m_ialloc_blks = mp->m_ialloc_inos >> sbp->sb_inopblog; | |
066a1884 BF |
850 | |
851 | if (sbp->sb_spino_align) | |
852 | mp->m_ialloc_min_blks = sbp->sb_spino_align; | |
853 | else | |
854 | mp->m_ialloc_min_blks = mp->m_ialloc_blks; | |
52548852 DW |
855 | mp->m_alloc_set_aside = xfs_alloc_set_aside(mp); |
856 | mp->m_ag_max_usable = xfs_alloc_ag_max_usable(mp); | |
ff55068c DC |
857 | } |
858 | ||
859 | /* | |
860 | * xfs_initialize_perag_data | |
861 | * | |
862 | * Read in each per-ag structure so we can count up the number of | |
863 | * allocated inodes, free inodes and used filesystem blocks as this | |
864 | * information is no longer persistent in the superblock. Once we have | |
865 | * this information, write it into the in-core superblock structure. | |
866 | */ | |
867 | int | |
868 | xfs_initialize_perag_data( | |
869 | struct xfs_mount *mp, | |
870 | xfs_agnumber_t agcount) | |
871 | { | |
872 | xfs_agnumber_t index; | |
873 | xfs_perag_t *pag; | |
874 | xfs_sb_t *sbp = &mp->m_sb; | |
875 | uint64_t ifree = 0; | |
876 | uint64_t ialloc = 0; | |
877 | uint64_t bfree = 0; | |
878 | uint64_t bfreelst = 0; | |
879 | uint64_t btree = 0; | |
2e9e6481 | 880 | uint64_t fdblocks; |
c1a4447f | 881 | int error = 0; |
ff55068c DC |
882 | |
883 | for (index = 0; index < agcount; index++) { | |
884 | /* | |
885 | * read the agf, then the agi. This gets us | |
886 | * all the information we need and populates the | |
887 | * per-ag structures for us. | |
888 | */ | |
889 | error = xfs_alloc_pagf_init(mp, NULL, index, 0); | |
890 | if (error) | |
891 | return error; | |
892 | ||
893 | error = xfs_ialloc_pagi_init(mp, NULL, index); | |
894 | if (error) | |
895 | return error; | |
896 | pag = xfs_perag_get(mp, index); | |
897 | ifree += pag->pagi_freecount; | |
898 | ialloc += pag->pagi_count; | |
899 | bfree += pag->pagf_freeblks; | |
900 | bfreelst += pag->pagf_flcount; | |
901 | btree += pag->pagf_btreeblks; | |
902 | xfs_perag_put(pag); | |
903 | } | |
2e9e6481 DW |
904 | fdblocks = bfree + bfreelst + btree; |
905 | ||
906 | /* | |
907 | * If the new summary counts are obviously incorrect, fail the | |
908 | * mount operation because that implies the AGFs are also corrupt. | |
39353ff6 | 909 | * Clear FS_COUNTERS so that we don't unmount with a dirty log, which |
2e9e6481 DW |
910 | * will prevent xfs_repair from fixing anything. |
911 | */ | |
912 | if (fdblocks > sbp->sb_dblocks || ifree > ialloc) { | |
913 | xfs_alert(mp, "AGF corruption. Please run xfs_repair."); | |
914 | error = -EFSCORRUPTED; | |
915 | goto out; | |
916 | } | |
5681ca40 DC |
917 | |
918 | /* Overwrite incore superblock counters with just-read data */ | |
ff55068c DC |
919 | spin_lock(&mp->m_sb_lock); |
920 | sbp->sb_ifree = ifree; | |
921 | sbp->sb_icount = ialloc; | |
2e9e6481 | 922 | sbp->sb_fdblocks = fdblocks; |
ff55068c DC |
923 | spin_unlock(&mp->m_sb_lock); |
924 | ||
5681ca40 | 925 | xfs_reinit_percpu_counters(mp); |
2e9e6481 | 926 | out: |
39353ff6 | 927 | xfs_fs_mark_healthy(mp, XFS_SICK_FS_COUNTERS); |
2e9e6481 | 928 | return error; |
ff55068c DC |
929 | } |
930 | ||
931 | /* | |
61e63ecb DC |
932 | * xfs_log_sb() can be used to copy arbitrary changes to the in-core superblock |
933 | * into the superblock buffer to be logged. It does not provide the higher | |
934 | * level of locking that is needed to protect the in-core superblock from | |
935 | * concurrent access. | |
ff55068c DC |
936 | */ |
937 | void | |
61e63ecb | 938 | xfs_log_sb( |
4d11a402 | 939 | struct xfs_trans *tp) |
ff55068c | 940 | { |
4d11a402 DC |
941 | struct xfs_mount *mp = tp->t_mountp; |
942 | struct xfs_buf *bp = xfs_trans_getsb(tp, mp, 0); | |
ff55068c | 943 | |
501ab323 | 944 | mp->m_sb.sb_icount = percpu_counter_sum(&mp->m_icount); |
e88b64ea | 945 | mp->m_sb.sb_ifree = percpu_counter_sum(&mp->m_ifree); |
0d485ada | 946 | mp->m_sb.sb_fdblocks = percpu_counter_sum(&mp->m_fdblocks); |
501ab323 | 947 | |
4d11a402 | 948 | xfs_sb_to_disk(XFS_BUF_TO_SBP(bp), &mp->m_sb); |
ff55068c | 949 | xfs_trans_buf_set_type(tp, bp, XFS_BLFT_SB_BUF); |
4d11a402 | 950 | xfs_trans_log_buf(tp, bp, 0, sizeof(struct xfs_dsb)); |
ff55068c | 951 | } |
61e63ecb DC |
952 | |
953 | /* | |
954 | * xfs_sync_sb | |
955 | * | |
956 | * Sync the superblock to disk. | |
957 | * | |
958 | * Note that the caller is responsible for checking the frozen state of the | |
959 | * filesystem. This procedure uses the non-blocking transaction allocator and | |
960 | * thus will allow modifications to a frozen fs. This is required because this | |
961 | * code can be called during the process of freezing where use of the high-level | |
962 | * allocator would deadlock. | |
963 | */ | |
964 | int | |
965 | xfs_sync_sb( | |
966 | struct xfs_mount *mp, | |
967 | bool wait) | |
968 | { | |
969 | struct xfs_trans *tp; | |
970 | int error; | |
971 | ||
253f4911 CH |
972 | error = xfs_trans_alloc(mp, &M_RES(mp)->tr_sb, 0, 0, |
973 | XFS_TRANS_NO_WRITECOUNT, &tp); | |
974 | if (error) | |
61e63ecb | 975 | return error; |
61e63ecb DC |
976 | |
977 | xfs_log_sb(tp); | |
978 | if (wait) | |
979 | xfs_trans_set_sync(tp); | |
70393313 | 980 | return xfs_trans_commit(tp); |
61e63ecb | 981 | } |
c368ebcd | 982 | |
b16817b6 DC |
983 | /* |
984 | * Update all the secondary superblocks to match the new state of the primary. | |
985 | * Because we are completely overwriting all the existing fields in the | |
986 | * secondary superblock buffers, there is no need to read them in from disk. | |
987 | * Just get a new buffer, stamp it and write it. | |
988 | * | |
989 | * The sb buffers need to be cached here so that we serialise against other | |
990 | * operations that access the secondary superblocks, but we don't want to keep | |
991 | * them in memory once it is written so we mark it as a one-shot buffer. | |
992 | */ | |
993 | int | |
994 | xfs_update_secondary_sbs( | |
995 | struct xfs_mount *mp) | |
996 | { | |
997 | xfs_agnumber_t agno; | |
998 | int saved_error = 0; | |
999 | int error = 0; | |
1000 | LIST_HEAD (buffer_list); | |
1001 | ||
1002 | /* update secondary superblocks. */ | |
1003 | for (agno = 1; agno < mp->m_sb.sb_agcount; agno++) { | |
1004 | struct xfs_buf *bp; | |
1005 | ||
1006 | bp = xfs_buf_get(mp->m_ddev_targp, | |
1007 | XFS_AG_DADDR(mp, agno, XFS_SB_DADDR), | |
1008 | XFS_FSS_TO_BB(mp, 1), 0); | |
1009 | /* | |
1010 | * If we get an error reading or writing alternate superblocks, | |
1011 | * continue. xfs_repair chooses the "best" superblock based | |
1012 | * on most matches; if we break early, we'll leave more | |
1013 | * superblocks un-updated than updated, and xfs_repair may | |
1014 | * pick them over the properly-updated primary. | |
1015 | */ | |
1016 | if (!bp) { | |
1017 | xfs_warn(mp, | |
1018 | "error allocating secondary superblock for ag %d", | |
1019 | agno); | |
1020 | if (!saved_error) | |
1021 | saved_error = -ENOMEM; | |
1022 | continue; | |
1023 | } | |
1024 | ||
1025 | bp->b_ops = &xfs_sb_buf_ops; | |
1026 | xfs_buf_oneshot(bp); | |
1027 | xfs_buf_zero(bp, 0, BBTOB(bp->b_length)); | |
1028 | xfs_sb_to_disk(XFS_BUF_TO_SBP(bp), &mp->m_sb); | |
1029 | xfs_buf_delwri_queue(bp, &buffer_list); | |
1030 | xfs_buf_relse(bp); | |
1031 | ||
1032 | /* don't hold too many buffers at once */ | |
1033 | if (agno % 16) | |
1034 | continue; | |
1035 | ||
1036 | error = xfs_buf_delwri_submit(&buffer_list); | |
1037 | if (error) { | |
1038 | xfs_warn(mp, | |
1039 | "write error %d updating a secondary superblock near ag %d", | |
1040 | error, agno); | |
1041 | if (!saved_error) | |
1042 | saved_error = error; | |
1043 | continue; | |
1044 | } | |
1045 | } | |
1046 | error = xfs_buf_delwri_submit(&buffer_list); | |
1047 | if (error) { | |
1048 | xfs_warn(mp, | |
1049 | "write error %d updating a secondary superblock near ag %d", | |
1050 | error, agno); | |
1051 | } | |
1052 | ||
1053 | return saved_error ? saved_error : error; | |
1054 | } | |
1055 | ||
f7664b31 ES |
1056 | /* |
1057 | * Same behavior as xfs_sync_sb, except that it is always synchronous and it | |
1058 | * also writes the superblock buffer to disk sector 0 immediately. | |
1059 | */ | |
1060 | int | |
1061 | xfs_sync_sb_buf( | |
1062 | struct xfs_mount *mp) | |
1063 | { | |
1064 | struct xfs_trans *tp; | |
89c2e711 | 1065 | struct xfs_buf *bp; |
f7664b31 ES |
1066 | int error; |
1067 | ||
1068 | error = xfs_trans_alloc(mp, &M_RES(mp)->tr_sb, 0, 0, 0, &tp); | |
1069 | if (error) | |
1070 | return error; | |
1071 | ||
89c2e711 | 1072 | bp = xfs_trans_getsb(tp, mp, 0); |
f7664b31 | 1073 | xfs_log_sb(tp); |
89c2e711 | 1074 | xfs_trans_bhold(tp, bp); |
f7664b31 ES |
1075 | xfs_trans_set_sync(tp); |
1076 | error = xfs_trans_commit(tp); | |
1077 | if (error) | |
1078 | goto out; | |
1079 | /* | |
1080 | * write out the sb buffer to get the changes to disk | |
1081 | */ | |
89c2e711 | 1082 | error = xfs_bwrite(bp); |
f7664b31 | 1083 | out: |
89c2e711 | 1084 | xfs_buf_relse(bp); |
f7664b31 ES |
1085 | return error; |
1086 | } | |
1087 | ||
91083269 | 1088 | void |
c368ebcd | 1089 | xfs_fs_geometry( |
ac503a4c DW |
1090 | struct xfs_sb *sbp, |
1091 | struct xfs_fsop_geom *geo, | |
1092 | int struct_version) | |
c368ebcd | 1093 | { |
ac503a4c DW |
1094 | memset(geo, 0, sizeof(struct xfs_fsop_geom)); |
1095 | ||
1096 | geo->blocksize = sbp->sb_blocksize; | |
1097 | geo->rtextsize = sbp->sb_rextsize; | |
1098 | geo->agblocks = sbp->sb_agblocks; | |
1099 | geo->agcount = sbp->sb_agcount; | |
1100 | geo->logblocks = sbp->sb_logblocks; | |
1101 | geo->sectsize = sbp->sb_sectsize; | |
1102 | geo->inodesize = sbp->sb_inodesize; | |
1103 | geo->imaxpct = sbp->sb_imax_pct; | |
1104 | geo->datablocks = sbp->sb_dblocks; | |
1105 | geo->rtblocks = sbp->sb_rblocks; | |
1106 | geo->rtextents = sbp->sb_rextents; | |
1107 | geo->logstart = sbp->sb_logstart; | |
1108 | BUILD_BUG_ON(sizeof(geo->uuid) != sizeof(sbp->sb_uuid)); | |
1109 | memcpy(geo->uuid, &sbp->sb_uuid, sizeof(sbp->sb_uuid)); | |
1110 | ||
1111 | if (struct_version < 2) | |
91083269 | 1112 | return; |
ac503a4c DW |
1113 | |
1114 | geo->sunit = sbp->sb_unit; | |
1115 | geo->swidth = sbp->sb_width; | |
1116 | ||
1117 | if (struct_version < 3) | |
91083269 | 1118 | return; |
ac503a4c DW |
1119 | |
1120 | geo->version = XFS_FSOP_GEOM_VERSION; | |
1121 | geo->flags = XFS_FSOP_GEOM_FLAGS_NLINK | | |
daa79bae CH |
1122 | XFS_FSOP_GEOM_FLAGS_DIRV2 | |
1123 | XFS_FSOP_GEOM_FLAGS_EXTFLG; | |
ac503a4c DW |
1124 | if (xfs_sb_version_hasattr(sbp)) |
1125 | geo->flags |= XFS_FSOP_GEOM_FLAGS_ATTR; | |
1126 | if (xfs_sb_version_hasquota(sbp)) | |
1127 | geo->flags |= XFS_FSOP_GEOM_FLAGS_QUOTA; | |
1128 | if (xfs_sb_version_hasalign(sbp)) | |
1129 | geo->flags |= XFS_FSOP_GEOM_FLAGS_IALIGN; | |
1130 | if (xfs_sb_version_hasdalign(sbp)) | |
1131 | geo->flags |= XFS_FSOP_GEOM_FLAGS_DALIGN; | |
ac503a4c DW |
1132 | if (xfs_sb_version_hassector(sbp)) |
1133 | geo->flags |= XFS_FSOP_GEOM_FLAGS_SECTOR; | |
1134 | if (xfs_sb_version_hasasciici(sbp)) | |
1135 | geo->flags |= XFS_FSOP_GEOM_FLAGS_DIRV2CI; | |
1136 | if (xfs_sb_version_haslazysbcount(sbp)) | |
1137 | geo->flags |= XFS_FSOP_GEOM_FLAGS_LAZYSB; | |
1138 | if (xfs_sb_version_hasattr2(sbp)) | |
1139 | geo->flags |= XFS_FSOP_GEOM_FLAGS_ATTR2; | |
1140 | if (xfs_sb_version_hasprojid32bit(sbp)) | |
1141 | geo->flags |= XFS_FSOP_GEOM_FLAGS_PROJID32; | |
1142 | if (xfs_sb_version_hascrc(sbp)) | |
1143 | geo->flags |= XFS_FSOP_GEOM_FLAGS_V5SB; | |
1144 | if (xfs_sb_version_hasftype(sbp)) | |
1145 | geo->flags |= XFS_FSOP_GEOM_FLAGS_FTYPE; | |
1146 | if (xfs_sb_version_hasfinobt(sbp)) | |
1147 | geo->flags |= XFS_FSOP_GEOM_FLAGS_FINOBT; | |
1148 | if (xfs_sb_version_hassparseinodes(sbp)) | |
1149 | geo->flags |= XFS_FSOP_GEOM_FLAGS_SPINODES; | |
1150 | if (xfs_sb_version_hasrmapbt(sbp)) | |
1151 | geo->flags |= XFS_FSOP_GEOM_FLAGS_RMAPBT; | |
1152 | if (xfs_sb_version_hasreflink(sbp)) | |
1153 | geo->flags |= XFS_FSOP_GEOM_FLAGS_REFLINK; | |
1154 | if (xfs_sb_version_hassector(sbp)) | |
1155 | geo->logsectsize = sbp->sb_logsectsize; | |
1156 | else | |
1157 | geo->logsectsize = BBSIZE; | |
1158 | geo->rtsectsize = sbp->sb_blocksize; | |
1159 | geo->dirblocksize = xfs_dir2_dirblock_bytes(sbp); | |
1160 | ||
a8789a5a | 1161 | if (struct_version < 4) |
91083269 | 1162 | return; |
ac503a4c DW |
1163 | |
1164 | if (xfs_sb_version_haslogv2(sbp)) | |
1165 | geo->flags |= XFS_FSOP_GEOM_FLAGS_LOGV2; | |
1166 | ||
1167 | geo->logsunit = sbp->sb_logsunit; | |
c368ebcd | 1168 | |
1b6d968d | 1169 | if (struct_version < 5) |
91083269 | 1170 | return; |
1b6d968d DC |
1171 | |
1172 | geo->version = XFS_FSOP_GEOM_VERSION_V5; | |
c368ebcd | 1173 | } |
689e11c8 DW |
1174 | |
1175 | /* Read a secondary superblock. */ | |
1176 | int | |
1177 | xfs_sb_read_secondary( | |
1178 | struct xfs_mount *mp, | |
1179 | struct xfs_trans *tp, | |
1180 | xfs_agnumber_t agno, | |
1181 | struct xfs_buf **bpp) | |
1182 | { | |
1183 | struct xfs_buf *bp; | |
1184 | int error; | |
1185 | ||
1186 | ASSERT(agno != 0 && agno != NULLAGNUMBER); | |
1187 | error = xfs_trans_read_buf(mp, tp, mp->m_ddev_targp, | |
1188 | XFS_AG_DADDR(mp, agno, XFS_SB_BLOCK(mp)), | |
1189 | XFS_FSS_TO_BB(mp, 1), 0, &bp, &xfs_sb_buf_ops); | |
1190 | if (error) | |
1191 | return error; | |
1192 | xfs_buf_set_ref(bp, XFS_SSB_REF); | |
1193 | *bpp = bp; | |
1194 | return 0; | |
1195 | } | |
d25522f1 DW |
1196 | |
1197 | /* Get an uninitialised secondary superblock buffer. */ | |
1198 | int | |
1199 | xfs_sb_get_secondary( | |
1200 | struct xfs_mount *mp, | |
1201 | struct xfs_trans *tp, | |
1202 | xfs_agnumber_t agno, | |
1203 | struct xfs_buf **bpp) | |
1204 | { | |
1205 | struct xfs_buf *bp; | |
1206 | ||
1207 | ASSERT(agno != 0 && agno != NULLAGNUMBER); | |
1208 | bp = xfs_trans_get_buf(tp, mp->m_ddev_targp, | |
1209 | XFS_AG_DADDR(mp, agno, XFS_SB_BLOCK(mp)), | |
1210 | XFS_FSS_TO_BB(mp, 1), 0); | |
1211 | if (!bp) | |
1212 | return -ENOMEM; | |
1213 | bp->b_ops = &xfs_sb_buf_ops; | |
1214 | xfs_buf_oneshot(bp); | |
1215 | *bpp = bp; | |
1216 | return 0; | |
1217 | } |