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37b3b4d6 | 1 | // SPDX-License-Identifier: GPL-2.0 |
2bd0ea18 | 2 | /* |
5e656dbb | 3 | * Copyright (c) 2000-2005 Silicon Graphics, Inc. |
da23017d | 4 | * All Rights Reserved. |
2bd0ea18 | 5 | */ |
9c799827 | 6 | #include "libxfs_priv.h" |
b626fb59 DC |
7 | #include "xfs_fs.h" |
8 | #include "xfs_shared.h" | |
9 | #include "xfs_format.h" | |
10 | #include "xfs_log_format.h" | |
11 | #include "xfs_trans_resv.h" | |
12 | #include "xfs_bit.h" | |
13 | #include "xfs_sb.h" | |
14 | #include "xfs_mount.h" | |
f944d3d0 | 15 | #include "xfs_defer.h" |
b626fb59 DC |
16 | #include "xfs_inode.h" |
17 | #include "xfs_ialloc.h" | |
18 | #include "xfs_alloc.h" | |
19 | #include "xfs_trace.h" | |
20 | #include "xfs_cksum.h" | |
21 | #include "xfs_trans.h" | |
22 | #include "xfs_bmap_btree.h" | |
23 | #include "xfs_alloc_btree.h" | |
24 | #include "xfs_ialloc_btree.h" | |
b3a96b46 | 25 | #include "xfs_rmap_btree.h" |
d8079fe0 DW |
26 | #include "xfs_bmap.h" |
27 | #include "xfs_refcount_btree.h" | |
a2a52384 DW |
28 | #include "xfs_da_format.h" |
29 | #include "xfs_da_btree.h" | |
2bd0ea18 | 30 | |
4896e6c8 DC |
31 | /* |
32 | * Physical superblock buffer manipulations. Shared with libxfs in userspace. | |
33 | */ | |
34 | ||
56b2de80 DC |
35 | /* |
36 | * Reference counting access wrappers to the perag structures. | |
37 | * Because we never free per-ag structures, the only thing we | |
38 | * have to protect against changes is the tree structure itself. | |
39 | */ | |
40 | struct xfs_perag * | |
4896e6c8 DC |
41 | xfs_perag_get( |
42 | struct xfs_mount *mp, | |
43 | xfs_agnumber_t agno) | |
a33a9e62 | 44 | { |
56b2de80 DC |
45 | struct xfs_perag *pag; |
46 | int ref = 0; | |
47 | ||
48 | rcu_read_lock(); | |
49 | pag = radix_tree_lookup(&mp->m_perag_tree, agno); | |
50 | if (pag) { | |
51 | ASSERT(atomic_read(&pag->pag_ref) >= 0); | |
52 | ref = atomic_inc_return(&pag->pag_ref); | |
a33a9e62 | 53 | } |
56b2de80 | 54 | rcu_read_unlock(); |
a2ceac1f | 55 | trace_xfs_perag_get(mp, agno, ref, _RET_IP_); |
56b2de80 DC |
56 | return pag; |
57 | } | |
a33a9e62 | 58 | |
4896e6c8 DC |
59 | /* |
60 | * search from @first to find the next perag with the given tag set. | |
61 | */ | |
62 | struct xfs_perag * | |
63 | xfs_perag_get_tag( | |
64 | struct xfs_mount *mp, | |
65 | xfs_agnumber_t first, | |
66 | int tag) | |
67 | { | |
68 | struct xfs_perag *pag; | |
69 | int found; | |
70 | int ref; | |
71 | ||
72 | rcu_read_lock(); | |
73 | found = radix_tree_gang_lookup_tag(&mp->m_perag_tree, | |
74 | (void **)&pag, first, 1, tag); | |
75 | if (found <= 0) { | |
76 | rcu_read_unlock(); | |
77 | return NULL; | |
78 | } | |
79 | ref = atomic_inc_return(&pag->pag_ref); | |
80 | rcu_read_unlock(); | |
81 | trace_xfs_perag_get_tag(mp, pag->pag_agno, ref, _RET_IP_); | |
82 | return pag; | |
83 | } | |
84 | ||
56b2de80 | 85 | void |
4896e6c8 DC |
86 | xfs_perag_put( |
87 | struct xfs_perag *pag) | |
56b2de80 DC |
88 | { |
89 | int ref; | |
a33a9e62 | 90 | |
56b2de80 DC |
91 | ASSERT(atomic_read(&pag->pag_ref) > 0); |
92 | ref = atomic_dec_return(&pag->pag_ref); | |
93 | trace_xfs_perag_put(pag->pag_mount, pag->pag_agno, ref, _RET_IP_); | |
a33a9e62 | 94 | } |
cdded3d8 | 95 | |
e2287707 | 96 | /* Check all the superblock fields we care about when reading one in. */ |
a2ceac1f | 97 | STATIC int |
e2287707 DW |
98 | xfs_validate_sb_read( |
99 | struct xfs_mount *mp, | |
100 | struct xfs_sb *sbp) | |
a2ceac1f | 101 | { |
e2287707 DW |
102 | if (XFS_SB_VERSION_NUM(sbp) != XFS_SB_VERSION_5) |
103 | return 0; | |
a2ceac1f | 104 | |
5565d79a | 105 | /* |
e2287707 DW |
106 | * Version 5 superblock feature mask validation. Reject combinations |
107 | * the kernel cannot support up front before checking anything else. | |
5565d79a | 108 | */ |
e2287707 DW |
109 | if (xfs_sb_has_compat_feature(sbp, XFS_SB_FEAT_COMPAT_UNKNOWN)) { |
110 | xfs_warn(mp, | |
2c2ec8ff | 111 | "Superblock has unknown compatible features (0x%x) enabled.", |
e2287707 DW |
112 | (sbp->sb_features_compat & XFS_SB_FEAT_COMPAT_UNKNOWN)); |
113 | xfs_warn(mp, | |
2c2ec8ff | 114 | "Using a more recent kernel is recommended."); |
e2287707 | 115 | } |
6567f1f9 | 116 | |
e2287707 DW |
117 | if (xfs_sb_has_ro_compat_feature(sbp, XFS_SB_FEAT_RO_COMPAT_UNKNOWN)) { |
118 | xfs_alert(mp, | |
ff105f75 | 119 | "Superblock has unknown read-only compatible features (0x%x) enabled.", |
e2287707 DW |
120 | (sbp->sb_features_ro_compat & |
121 | XFS_SB_FEAT_RO_COMPAT_UNKNOWN)); | |
122 | if (!(mp->m_flags & XFS_MOUNT_RDONLY)) { | |
123 | xfs_warn(mp, | |
2c2ec8ff | 124 | "Attempted to mount read-only compatible filesystem read-write."); |
e2287707 | 125 | xfs_warn(mp, |
ff105f75 | 126 | "Filesystem can only be safely mounted read only."); |
2c2ec8ff | 127 | |
12b53197 | 128 | return -EINVAL; |
6567f1f9 | 129 | } |
e2287707 DW |
130 | } |
131 | if (xfs_sb_has_incompat_feature(sbp, XFS_SB_FEAT_INCOMPAT_UNKNOWN)) { | |
132 | xfs_warn(mp, | |
133 | "Superblock has unknown incompatible features (0x%x) enabled.", | |
134 | (sbp->sb_features_incompat & | |
135 | XFS_SB_FEAT_INCOMPAT_UNKNOWN)); | |
136 | xfs_warn(mp, | |
137 | "Filesystem cannot be safely mounted by this kernel."); | |
138 | return -EINVAL; | |
139 | } | |
140 | ||
141 | return 0; | |
142 | } | |
143 | ||
144 | /* Check all the superblock fields we care about when writing one out. */ | |
145 | STATIC int | |
146 | xfs_validate_sb_write( | |
147 | struct xfs_mount *mp, | |
bc226d36 | 148 | struct xfs_buf *bp, |
e2287707 DW |
149 | struct xfs_sb *sbp) |
150 | { | |
5a527622 BD |
151 | /* |
152 | * Carry out additional sb summary counter sanity checks when we write | |
153 | * the superblock. We skip this in the read validator because there | |
154 | * could be newer superblocks in the log and if the values are garbage | |
751d83bc | 155 | * even after replay we'll recalculate them at the end of log mount. |
bc226d36 DW |
156 | * |
157 | * mkfs has traditionally written zeroed counters to inprogress and | |
158 | * secondary superblocks, so allow this usage to continue because | |
159 | * we never read counters from such superblocks. | |
5a527622 | 160 | */ |
bc226d36 DW |
161 | if (XFS_BUF_ADDR(bp) == XFS_SB_DADDR && !sbp->sb_inprogress && |
162 | (sbp->sb_fdblocks > sbp->sb_dblocks || | |
163 | !xfs_verify_icount(mp, sbp->sb_icount) || | |
164 | sbp->sb_ifree > sbp->sb_icount)) { | |
5a527622 BD |
165 | xfs_warn(mp, "SB summary counter sanity check failed"); |
166 | return -EFSCORRUPTED; | |
167 | } | |
168 | ||
e2287707 DW |
169 | if (XFS_SB_VERSION_NUM(sbp) != XFS_SB_VERSION_5) |
170 | return 0; | |
171 | ||
f0874fc5 DW |
172 | /* |
173 | * Version 5 superblock feature mask validation. Reject combinations | |
174 | * the kernel cannot support since we checked for unsupported bits in | |
175 | * the read verifier, which means that memory is corrupt. | |
176 | */ | |
177 | if (xfs_sb_has_compat_feature(sbp, XFS_SB_FEAT_COMPAT_UNKNOWN)) { | |
178 | xfs_warn(mp, | |
179 | "Corruption detected in superblock compatible features (0x%x)!", | |
180 | (sbp->sb_features_compat & XFS_SB_FEAT_COMPAT_UNKNOWN)); | |
181 | return -EFSCORRUPTED; | |
182 | } | |
183 | ||
184 | if (xfs_sb_has_ro_compat_feature(sbp, XFS_SB_FEAT_RO_COMPAT_UNKNOWN)) { | |
185 | xfs_alert(mp, | |
186 | "Corruption detected in superblock read-only compatible features (0x%x)!", | |
187 | (sbp->sb_features_ro_compat & | |
188 | XFS_SB_FEAT_RO_COMPAT_UNKNOWN)); | |
189 | return -EFSCORRUPTED; | |
190 | } | |
191 | if (xfs_sb_has_incompat_feature(sbp, XFS_SB_FEAT_INCOMPAT_UNKNOWN)) { | |
192 | xfs_warn(mp, | |
193 | "Corruption detected in superblock incompatible features (0x%x)!", | |
194 | (sbp->sb_features_incompat & | |
195 | XFS_SB_FEAT_INCOMPAT_UNKNOWN)); | |
196 | return -EFSCORRUPTED; | |
197 | } | |
198 | if (xfs_sb_has_incompat_log_feature(sbp, | |
199 | XFS_SB_FEAT_INCOMPAT_LOG_UNKNOWN)) { | |
200 | xfs_warn(mp, | |
201 | "Corruption detected in superblock incompatible log features (0x%x)!", | |
202 | (sbp->sb_features_log_incompat & | |
203 | XFS_SB_FEAT_INCOMPAT_LOG_UNKNOWN)); | |
204 | return -EFSCORRUPTED; | |
205 | } | |
e2287707 DW |
206 | |
207 | /* | |
208 | * We can't read verify the sb LSN because the read verifier is called | |
209 | * before the log is allocated and processed. We know the log is set up | |
210 | * before write verifier calls, so check it here. | |
211 | */ | |
212 | if (!xfs_log_check_lsn(mp, sbp->sb_lsn)) | |
213 | return -EFSCORRUPTED; | |
214 | ||
215 | return 0; | |
216 | } | |
217 | ||
218 | /* Check the validity of the SB. */ | |
219 | STATIC int | |
220 | xfs_validate_sb_common( | |
221 | struct xfs_mount *mp, | |
222 | struct xfs_buf *bp, | |
223 | struct xfs_sb *sbp) | |
224 | { | |
225 | uint32_t agcount = 0; | |
226 | uint32_t rem; | |
227 | ||
228 | if (sbp->sb_magicnum != XFS_SB_MAGIC) { | |
229 | xfs_warn(mp, "bad magic number"); | |
230 | return -EWRONGFS; | |
231 | } | |
232 | ||
233 | if (!xfs_sb_good_version(sbp)) { | |
234 | xfs_warn(mp, "bad version"); | |
235 | return -EWRONGFS; | |
5565d79a DC |
236 | } |
237 | ||
4896e6c8 DC |
238 | if (xfs_sb_version_has_pquotino(sbp)) { |
239 | if (sbp->sb_qflags & (XFS_OQUOTA_ENFD | XFS_OQUOTA_CHKD)) { | |
240 | xfs_notice(mp, | |
12864fd9 | 241 | "Version 5 of Super block has XFS_OQUOTA bits."); |
12b53197 | 242 | return -EFSCORRUPTED; |
4896e6c8 DC |
243 | } |
244 | } else if (sbp->sb_qflags & (XFS_PQUOTA_ENFD | XFS_GQUOTA_ENFD | | |
245 | XFS_PQUOTA_CHKD | XFS_GQUOTA_CHKD)) { | |
246 | xfs_notice(mp, | |
12864fd9 | 247 | "Superblock earlier than Version 5 has XFS_[PQ]UOTA_{ENFD|CHKD} bits."); |
12b53197 | 248 | return -EFSCORRUPTED; |
342aef1e CS |
249 | } |
250 | ||
7f5cd45d BF |
251 | /* |
252 | * Full inode chunks must be aligned to inode chunk size when | |
253 | * sparse inodes are enabled to support the sparse chunk | |
254 | * allocation algorithm and prevent overlapping inode records. | |
255 | */ | |
256 | if (xfs_sb_version_hassparseinodes(sbp)) { | |
257 | uint32_t align; | |
258 | ||
7f5cd45d BF |
259 | align = XFS_INODES_PER_CHUNK * sbp->sb_inodesize |
260 | >> sbp->sb_blocklog; | |
261 | if (sbp->sb_inoalignmt != align) { | |
262 | xfs_warn(mp, | |
263 | "Inode block alignment (%u) must match chunk size (%u) for sparse inodes.", | |
264 | sbp->sb_inoalignmt, align); | |
265 | return -EINVAL; | |
266 | } | |
267 | } | |
268 | ||
a2ceac1f | 269 | if (unlikely( |
6567f1f9 | 270 | sbp->sb_logstart == 0 && mp->m_logdev_targp == mp->m_ddev_targp)) { |
a2ceac1f DC |
271 | xfs_warn(mp, |
272 | "filesystem is marked as having an external log; " | |
273 | "specify logdev on the mount command line."); | |
12b53197 | 274 | return -EINVAL; |
a2ceac1f DC |
275 | } |
276 | ||
277 | if (unlikely( | |
6567f1f9 | 278 | sbp->sb_logstart != 0 && mp->m_logdev_targp != mp->m_ddev_targp)) { |
a2ceac1f DC |
279 | xfs_warn(mp, |
280 | "filesystem is marked as having an internal log; " | |
281 | "do not specify logdev on the mount command line."); | |
12b53197 | 282 | return -EINVAL; |
a2ceac1f DC |
283 | } |
284 | ||
e91df844 DW |
285 | /* Compute agcount for this number of dblocks and agblocks */ |
286 | if (sbp->sb_agblocks) { | |
287 | agcount = div_u64_rem(sbp->sb_dblocks, sbp->sb_agblocks, &rem); | |
288 | if (rem) | |
289 | agcount++; | |
290 | } | |
291 | ||
a2ceac1f DC |
292 | /* |
293 | * More sanity checking. Most of these were stolen directly from | |
294 | * xfs_repair. | |
295 | */ | |
296 | if (unlikely( | |
297 | sbp->sb_agcount <= 0 || | |
298 | sbp->sb_sectsize < XFS_MIN_SECTORSIZE || | |
299 | sbp->sb_sectsize > XFS_MAX_SECTORSIZE || | |
300 | sbp->sb_sectlog < XFS_MIN_SECTORSIZE_LOG || | |
301 | sbp->sb_sectlog > XFS_MAX_SECTORSIZE_LOG || | |
302 | sbp->sb_sectsize != (1 << sbp->sb_sectlog) || | |
303 | sbp->sb_blocksize < XFS_MIN_BLOCKSIZE || | |
304 | sbp->sb_blocksize > XFS_MAX_BLOCKSIZE || | |
305 | sbp->sb_blocklog < XFS_MIN_BLOCKSIZE_LOG || | |
306 | sbp->sb_blocklog > XFS_MAX_BLOCKSIZE_LOG || | |
307 | sbp->sb_blocksize != (1 << sbp->sb_blocklog) || | |
2e6fca28 | 308 | sbp->sb_dirblklog + sbp->sb_blocklog > XFS_MAX_BLOCKSIZE_LOG || |
a2ceac1f DC |
309 | sbp->sb_inodesize < XFS_DINODE_MIN_SIZE || |
310 | sbp->sb_inodesize > XFS_DINODE_MAX_SIZE || | |
311 | sbp->sb_inodelog < XFS_DINODE_MIN_LOG || | |
312 | sbp->sb_inodelog > XFS_DINODE_MAX_LOG || | |
313 | sbp->sb_inodesize != (1 << sbp->sb_inodelog) || | |
5a35bf2c | 314 | sbp->sb_logsunit > XLOG_MAX_RECORD_BSIZE || |
4b0c789d | 315 | sbp->sb_inopblock != howmany(sbp->sb_blocksize,sbp->sb_inodesize) || |
e91df844 DW |
316 | XFS_FSB_TO_B(mp, sbp->sb_agblocks) < XFS_MIN_AG_BYTES || |
317 | XFS_FSB_TO_B(mp, sbp->sb_agblocks) > XFS_MAX_AG_BYTES || | |
318 | sbp->sb_agblklog != xfs_highbit32(sbp->sb_agblocks - 1) + 1 || | |
319 | agcount == 0 || agcount != sbp->sb_agcount || | |
a2ceac1f DC |
320 | (sbp->sb_blocklog - sbp->sb_inodelog != sbp->sb_inopblog) || |
321 | (sbp->sb_rextsize * sbp->sb_blocksize > XFS_MAX_RTEXTSIZE) || | |
322 | (sbp->sb_rextsize * sbp->sb_blocksize < XFS_MIN_RTEXTSIZE) || | |
323 | (sbp->sb_imax_pct > 100 /* zero sb_imax_pct is valid */) || | |
324 | sbp->sb_dblocks == 0 || | |
325 | sbp->sb_dblocks > XFS_MAX_DBLOCKS(sbp) || | |
ff105f75 DC |
326 | sbp->sb_dblocks < XFS_MIN_DBLOCKS(sbp) || |
327 | sbp->sb_shared_vn != 0)) { | |
ba5027e0 | 328 | xfs_notice(mp, "SB sanity check failed"); |
12b53197 | 329 | return -EFSCORRUPTED; |
a2ceac1f DC |
330 | } |
331 | ||
595add55 DC |
332 | if (sbp->sb_unit) { |
333 | if (!xfs_sb_version_hasdalign(sbp) || | |
334 | sbp->sb_unit > sbp->sb_width || | |
335 | (sbp->sb_width % sbp->sb_unit) != 0) { | |
336 | xfs_notice(mp, "SB stripe unit sanity check failed"); | |
337 | return -EFSCORRUPTED; | |
338 | } | |
339 | } else if (xfs_sb_version_hasdalign(sbp)) { | |
340 | xfs_notice(mp, "SB stripe alignment sanity check failed"); | |
341 | return -EFSCORRUPTED; | |
342 | } else if (sbp->sb_width) { | |
343 | xfs_notice(mp, "SB stripe width sanity check failed"); | |
344 | return -EFSCORRUPTED; | |
345 | } | |
346 | ||
347 | ||
342ec632 DW |
348 | if (xfs_sb_version_hascrc(&mp->m_sb) && |
349 | sbp->sb_blocksize < XFS_MIN_CRC_BLOCKSIZE) { | |
350 | xfs_notice(mp, "v5 SB sanity check failed"); | |
351 | return -EFSCORRUPTED; | |
352 | } | |
353 | ||
a2ceac1f DC |
354 | /* |
355 | * Currently only very few inode sizes are supported. | |
356 | */ | |
357 | switch (sbp->sb_inodesize) { | |
358 | case 256: | |
359 | case 512: | |
360 | case 1024: | |
361 | case 2048: | |
362 | break; | |
363 | default: | |
364 | xfs_warn(mp, "inode size of %d bytes not supported", | |
365 | sbp->sb_inodesize); | |
12b53197 | 366 | return -ENOSYS; |
a2ceac1f DC |
367 | } |
368 | ||
4896e6c8 DC |
369 | if (xfs_sb_validate_fsb_count(sbp, sbp->sb_dblocks) || |
370 | xfs_sb_validate_fsb_count(sbp, sbp->sb_rblocks)) { | |
371 | xfs_warn(mp, | |
372 | "file system too large to be mounted on this system."); | |
12b53197 | 373 | return -EFBIG; |
4896e6c8 DC |
374 | } |
375 | ||
a2ceac1f DC |
376 | return 0; |
377 | } | |
378 | ||
4896e6c8 DC |
379 | void |
380 | xfs_sb_quota_from_disk(struct xfs_sb *sbp) | |
381 | { | |
382 | /* | |
383 | * older mkfs doesn't initialize quota inodes to NULLFSINO. This | |
384 | * leads to in-core values having two different values for a quota | |
385 | * inode to be invalid: 0 and NULLFSINO. Change it to a single value | |
386 | * NULLFSINO. | |
387 | * | |
388 | * Note that this change affect only the in-core values. These | |
389 | * values are not written back to disk unless any quota information | |
390 | * is written to the disk. Even in that case, sb_pquotino field is | |
391 | * not written to disk unless the superblock supports pquotino. | |
392 | */ | |
393 | if (sbp->sb_uquotino == 0) | |
394 | sbp->sb_uquotino = NULLFSINO; | |
395 | if (sbp->sb_gquotino == 0) | |
396 | sbp->sb_gquotino = NULLFSINO; | |
397 | if (sbp->sb_pquotino == 0) | |
398 | sbp->sb_pquotino = NULLFSINO; | |
399 | ||
400 | /* | |
401 | * We need to do these manipilations only if we are working | |
402 | * with an older version of on-disk superblock. | |
403 | */ | |
404 | if (xfs_sb_version_has_pquotino(sbp)) | |
405 | return; | |
406 | ||
407 | if (sbp->sb_qflags & XFS_OQUOTA_ENFD) | |
408 | sbp->sb_qflags |= (sbp->sb_qflags & XFS_PQUOTA_ACCT) ? | |
409 | XFS_PQUOTA_ENFD : XFS_GQUOTA_ENFD; | |
410 | if (sbp->sb_qflags & XFS_OQUOTA_CHKD) | |
411 | sbp->sb_qflags |= (sbp->sb_qflags & XFS_PQUOTA_ACCT) ? | |
412 | XFS_PQUOTA_CHKD : XFS_GQUOTA_CHKD; | |
413 | sbp->sb_qflags &= ~(XFS_OQUOTA_ENFD | XFS_OQUOTA_CHKD); | |
414 | ||
ee375425 ES |
415 | if (sbp->sb_qflags & XFS_PQUOTA_ACCT && |
416 | sbp->sb_gquotino != NULLFSINO) { | |
4896e6c8 DC |
417 | /* |
418 | * In older version of superblock, on-disk superblock only | |
419 | * has sb_gquotino, and in-core superblock has both sb_gquotino | |
420 | * and sb_pquotino. But, only one of them is supported at any | |
421 | * point of time. So, if PQUOTA is set in disk superblock, | |
ee375425 ES |
422 | * copy over sb_gquotino to sb_pquotino. The NULLFSINO test |
423 | * above is to make sure we don't do this twice and wipe them | |
424 | * both out! | |
4896e6c8 DC |
425 | */ |
426 | sbp->sb_pquotino = sbp->sb_gquotino; | |
427 | sbp->sb_gquotino = NULLFSINO; | |
428 | } | |
429 | } | |
430 | ||
5a35bf2c DC |
431 | static void |
432 | __xfs_sb_from_disk( | |
4896e6c8 | 433 | struct xfs_sb *to, |
5a35bf2c DC |
434 | xfs_dsb_t *from, |
435 | bool convert_xquota) | |
5e656dbb BN |
436 | { |
437 | to->sb_magicnum = be32_to_cpu(from->sb_magicnum); | |
438 | to->sb_blocksize = be32_to_cpu(from->sb_blocksize); | |
439 | to->sb_dblocks = be64_to_cpu(from->sb_dblocks); | |
440 | to->sb_rblocks = be64_to_cpu(from->sb_rblocks); | |
441 | to->sb_rextents = be64_to_cpu(from->sb_rextents); | |
442 | memcpy(&to->sb_uuid, &from->sb_uuid, sizeof(to->sb_uuid)); | |
443 | to->sb_logstart = be64_to_cpu(from->sb_logstart); | |
444 | to->sb_rootino = be64_to_cpu(from->sb_rootino); | |
445 | to->sb_rbmino = be64_to_cpu(from->sb_rbmino); | |
446 | to->sb_rsumino = be64_to_cpu(from->sb_rsumino); | |
447 | to->sb_rextsize = be32_to_cpu(from->sb_rextsize); | |
448 | to->sb_agblocks = be32_to_cpu(from->sb_agblocks); | |
449 | to->sb_agcount = be32_to_cpu(from->sb_agcount); | |
450 | to->sb_rbmblocks = be32_to_cpu(from->sb_rbmblocks); | |
451 | to->sb_logblocks = be32_to_cpu(from->sb_logblocks); | |
452 | to->sb_versionnum = be16_to_cpu(from->sb_versionnum); | |
453 | to->sb_sectsize = be16_to_cpu(from->sb_sectsize); | |
454 | to->sb_inodesize = be16_to_cpu(from->sb_inodesize); | |
455 | to->sb_inopblock = be16_to_cpu(from->sb_inopblock); | |
456 | memcpy(&to->sb_fname, &from->sb_fname, sizeof(to->sb_fname)); | |
457 | to->sb_blocklog = from->sb_blocklog; | |
458 | to->sb_sectlog = from->sb_sectlog; | |
459 | to->sb_inodelog = from->sb_inodelog; | |
460 | to->sb_inopblog = from->sb_inopblog; | |
461 | to->sb_agblklog = from->sb_agblklog; | |
462 | to->sb_rextslog = from->sb_rextslog; | |
463 | to->sb_inprogress = from->sb_inprogress; | |
464 | to->sb_imax_pct = from->sb_imax_pct; | |
465 | to->sb_icount = be64_to_cpu(from->sb_icount); | |
466 | to->sb_ifree = be64_to_cpu(from->sb_ifree); | |
467 | to->sb_fdblocks = be64_to_cpu(from->sb_fdblocks); | |
468 | to->sb_frextents = be64_to_cpu(from->sb_frextents); | |
469 | to->sb_uquotino = be64_to_cpu(from->sb_uquotino); | |
470 | to->sb_gquotino = be64_to_cpu(from->sb_gquotino); | |
471 | to->sb_qflags = be16_to_cpu(from->sb_qflags); | |
472 | to->sb_flags = from->sb_flags; | |
473 | to->sb_shared_vn = from->sb_shared_vn; | |
474 | to->sb_inoalignmt = be32_to_cpu(from->sb_inoalignmt); | |
475 | to->sb_unit = be32_to_cpu(from->sb_unit); | |
476 | to->sb_width = be32_to_cpu(from->sb_width); | |
477 | to->sb_dirblklog = from->sb_dirblklog; | |
478 | to->sb_logsectlog = from->sb_logsectlog; | |
479 | to->sb_logsectsize = be16_to_cpu(from->sb_logsectsize); | |
480 | to->sb_logsunit = be32_to_cpu(from->sb_logsunit); | |
481 | to->sb_features2 = be32_to_cpu(from->sb_features2); | |
482 | to->sb_bad_features2 = be32_to_cpu(from->sb_bad_features2); | |
5565d79a DC |
483 | to->sb_features_compat = be32_to_cpu(from->sb_features_compat); |
484 | to->sb_features_ro_compat = be32_to_cpu(from->sb_features_ro_compat); | |
485 | to->sb_features_incompat = be32_to_cpu(from->sb_features_incompat); | |
6567f1f9 DC |
486 | to->sb_features_log_incompat = |
487 | be32_to_cpu(from->sb_features_log_incompat); | |
5a35bf2c DC |
488 | /* crc is only used on disk, not in memory; just init to 0 here. */ |
489 | to->sb_crc = 0; | |
6bd8b7e1 | 490 | to->sb_spino_align = be32_to_cpu(from->sb_spino_align); |
5565d79a DC |
491 | to->sb_pquotino = be64_to_cpu(from->sb_pquotino); |
492 | to->sb_lsn = be64_to_cpu(from->sb_lsn); | |
9c4e12fb ES |
493 | /* |
494 | * sb_meta_uuid is only on disk if it differs from sb_uuid and the | |
495 | * feature flag is set; if not set we keep it only in memory. | |
496 | */ | |
497 | if (xfs_sb_version_hasmetauuid(to)) | |
498 | uuid_copy(&to->sb_meta_uuid, &from->sb_meta_uuid); | |
499 | else | |
500 | uuid_copy(&to->sb_meta_uuid, &from->sb_uuid); | |
5a35bf2c DC |
501 | /* Convert on-disk flags to in-memory flags? */ |
502 | if (convert_xquota) | |
503 | xfs_sb_quota_from_disk(to); | |
504 | } | |
505 | ||
506 | void | |
507 | xfs_sb_from_disk( | |
508 | struct xfs_sb *to, | |
509 | xfs_dsb_t *from) | |
510 | { | |
511 | __xfs_sb_from_disk(to, from, true); | |
5e656dbb BN |
512 | } |
513 | ||
19ebedcf | 514 | static void |
342aef1e | 515 | xfs_sb_quota_to_disk( |
19ebedcf DC |
516 | struct xfs_dsb *to, |
517 | struct xfs_sb *from) | |
342aef1e | 518 | { |
4a492e72 | 519 | uint16_t qflags = from->sb_qflags; |
342aef1e | 520 | |
19ebedcf DC |
521 | to->sb_uquotino = cpu_to_be64(from->sb_uquotino); |
522 | if (xfs_sb_version_has_pquotino(from)) { | |
523 | to->sb_qflags = cpu_to_be16(from->sb_qflags); | |
524 | to->sb_gquotino = cpu_to_be64(from->sb_gquotino); | |
525 | to->sb_pquotino = cpu_to_be64(from->sb_pquotino); | |
526 | return; | |
527 | } | |
528 | ||
0340d706 | 529 | /* |
19ebedcf DC |
530 | * The in-core version of sb_qflags do not have XFS_OQUOTA_* |
531 | * flags, whereas the on-disk version does. So, convert incore | |
532 | * XFS_{PG}QUOTA_* flags to on-disk XFS_OQUOTA_* flags. | |
0340d706 | 533 | */ |
19ebedcf DC |
534 | qflags &= ~(XFS_PQUOTA_ENFD | XFS_PQUOTA_CHKD | |
535 | XFS_GQUOTA_ENFD | XFS_GQUOTA_CHKD); | |
0340d706 | 536 | |
19ebedcf DC |
537 | if (from->sb_qflags & |
538 | (XFS_PQUOTA_ENFD | XFS_GQUOTA_ENFD)) | |
539 | qflags |= XFS_OQUOTA_ENFD; | |
540 | if (from->sb_qflags & | |
541 | (XFS_PQUOTA_CHKD | XFS_GQUOTA_CHKD)) | |
542 | qflags |= XFS_OQUOTA_CHKD; | |
543 | to->sb_qflags = cpu_to_be16(qflags); | |
0340d706 CS |
544 | |
545 | /* | |
19ebedcf DC |
546 | * GQUOTINO and PQUOTINO cannot be used together in versions |
547 | * of superblock that do not have pquotino. from->sb_flags | |
548 | * tells us which quota is active and should be copied to | |
549 | * disk. If neither are active, we should NULL the inode. | |
ff105f75 | 550 | * |
19ebedcf DC |
551 | * In all cases, the separate pquotino must remain 0 because it |
552 | * it beyond the "end" of the valid non-pquotino superblock. | |
0340d706 | 553 | */ |
19ebedcf | 554 | if (from->sb_qflags & XFS_GQUOTA_ACCT) |
0340d706 | 555 | to->sb_gquotino = cpu_to_be64(from->sb_gquotino); |
19ebedcf | 556 | else if (from->sb_qflags & XFS_PQUOTA_ACCT) |
0340d706 | 557 | to->sb_gquotino = cpu_to_be64(from->sb_pquotino); |
ff105f75 DC |
558 | else { |
559 | /* | |
560 | * We can't rely on just the fields being logged to tell us | |
561 | * that it is safe to write NULLFSINO - we should only do that | |
562 | * if quotas are not actually enabled. Hence only write | |
563 | * NULLFSINO if both in-core quota inodes are NULL. | |
564 | */ | |
565 | if (from->sb_gquotino == NULLFSINO && | |
566 | from->sb_pquotino == NULLFSINO) | |
567 | to->sb_gquotino = cpu_to_be64(NULLFSINO); | |
568 | } | |
0340d706 | 569 | |
19ebedcf | 570 | to->sb_pquotino = 0; |
342aef1e CS |
571 | } |
572 | ||
5e656dbb BN |
573 | void |
574 | xfs_sb_to_disk( | |
19ebedcf DC |
575 | struct xfs_dsb *to, |
576 | struct xfs_sb *from) | |
5e656dbb | 577 | { |
19ebedcf | 578 | xfs_sb_quota_to_disk(to, from); |
5e656dbb | 579 | |
19ebedcf DC |
580 | to->sb_magicnum = cpu_to_be32(from->sb_magicnum); |
581 | to->sb_blocksize = cpu_to_be32(from->sb_blocksize); | |
582 | to->sb_dblocks = cpu_to_be64(from->sb_dblocks); | |
583 | to->sb_rblocks = cpu_to_be64(from->sb_rblocks); | |
584 | to->sb_rextents = cpu_to_be64(from->sb_rextents); | |
585 | memcpy(&to->sb_uuid, &from->sb_uuid, sizeof(to->sb_uuid)); | |
586 | to->sb_logstart = cpu_to_be64(from->sb_logstart); | |
587 | to->sb_rootino = cpu_to_be64(from->sb_rootino); | |
588 | to->sb_rbmino = cpu_to_be64(from->sb_rbmino); | |
589 | to->sb_rsumino = cpu_to_be64(from->sb_rsumino); | |
590 | to->sb_rextsize = cpu_to_be32(from->sb_rextsize); | |
591 | to->sb_agblocks = cpu_to_be32(from->sb_agblocks); | |
592 | to->sb_agcount = cpu_to_be32(from->sb_agcount); | |
593 | to->sb_rbmblocks = cpu_to_be32(from->sb_rbmblocks); | |
594 | to->sb_logblocks = cpu_to_be32(from->sb_logblocks); | |
595 | to->sb_versionnum = cpu_to_be16(from->sb_versionnum); | |
596 | to->sb_sectsize = cpu_to_be16(from->sb_sectsize); | |
597 | to->sb_inodesize = cpu_to_be16(from->sb_inodesize); | |
598 | to->sb_inopblock = cpu_to_be16(from->sb_inopblock); | |
599 | memcpy(&to->sb_fname, &from->sb_fname, sizeof(to->sb_fname)); | |
600 | to->sb_blocklog = from->sb_blocklog; | |
601 | to->sb_sectlog = from->sb_sectlog; | |
602 | to->sb_inodelog = from->sb_inodelog; | |
603 | to->sb_inopblog = from->sb_inopblog; | |
604 | to->sb_agblklog = from->sb_agblklog; | |
605 | to->sb_rextslog = from->sb_rextslog; | |
606 | to->sb_inprogress = from->sb_inprogress; | |
607 | to->sb_imax_pct = from->sb_imax_pct; | |
608 | to->sb_icount = cpu_to_be64(from->sb_icount); | |
609 | to->sb_ifree = cpu_to_be64(from->sb_ifree); | |
610 | to->sb_fdblocks = cpu_to_be64(from->sb_fdblocks); | |
611 | to->sb_frextents = cpu_to_be64(from->sb_frextents); | |
612 | ||
613 | to->sb_flags = from->sb_flags; | |
614 | to->sb_shared_vn = from->sb_shared_vn; | |
615 | to->sb_inoalignmt = cpu_to_be32(from->sb_inoalignmt); | |
616 | to->sb_unit = cpu_to_be32(from->sb_unit); | |
617 | to->sb_width = cpu_to_be32(from->sb_width); | |
618 | to->sb_dirblklog = from->sb_dirblklog; | |
619 | to->sb_logsectlog = from->sb_logsectlog; | |
620 | to->sb_logsectsize = cpu_to_be16(from->sb_logsectsize); | |
621 | to->sb_logsunit = cpu_to_be32(from->sb_logsunit); | |
5e656dbb | 622 | |
19ebedcf DC |
623 | /* |
624 | * We need to ensure that bad_features2 always matches features2. | |
625 | * Hence we enforce that here rather than having to remember to do it | |
626 | * everywhere else that updates features2. | |
627 | */ | |
628 | from->sb_bad_features2 = from->sb_features2; | |
629 | to->sb_features2 = cpu_to_be32(from->sb_features2); | |
630 | to->sb_bad_features2 = cpu_to_be32(from->sb_bad_features2); | |
631 | ||
632 | if (xfs_sb_version_hascrc(from)) { | |
633 | to->sb_features_compat = cpu_to_be32(from->sb_features_compat); | |
634 | to->sb_features_ro_compat = | |
635 | cpu_to_be32(from->sb_features_ro_compat); | |
636 | to->sb_features_incompat = | |
637 | cpu_to_be32(from->sb_features_incompat); | |
638 | to->sb_features_log_incompat = | |
639 | cpu_to_be32(from->sb_features_log_incompat); | |
6bd8b7e1 | 640 | to->sb_spino_align = cpu_to_be32(from->sb_spino_align); |
19ebedcf | 641 | to->sb_lsn = cpu_to_be64(from->sb_lsn); |
9c4e12fb ES |
642 | if (xfs_sb_version_hasmetauuid(from)) |
643 | uuid_copy(&to->sb_meta_uuid, &from->sb_meta_uuid); | |
5e656dbb BN |
644 | } |
645 | } | |
646 | ||
5565d79a DC |
647 | /* |
648 | * If the superblock has the CRC feature bit set or the CRC field is non-null, | |
649 | * check that the CRC is valid. We check the CRC field is non-null because a | |
650 | * single bit error could clear the feature bit and unused parts of the | |
651 | * superblock are supposed to be zero. Hence a non-null crc field indicates that | |
652 | * we've potentially lost a feature bit and we should check it anyway. | |
46ea3a62 DC |
653 | * |
654 | * However, past bugs (i.e. in growfs) left non-zeroed regions beyond the | |
655 | * last field in V4 secondary superblocks. So for secondary superblocks, | |
656 | * we are more forgiving, and ignore CRC failures if the primary doesn't | |
657 | * indicate that the fs version is V5. | |
5565d79a | 658 | */ |
a2ceac1f DC |
659 | static void |
660 | xfs_sb_read_verify( | |
e2287707 | 661 | struct xfs_buf *bp) |
a2ceac1f | 662 | { |
e2287707 DW |
663 | struct xfs_sb sb; |
664 | struct xfs_mount *mp = bp->b_target->bt_mount; | |
665 | struct xfs_dsb *dsb = XFS_BUF_TO_SBP(bp); | |
666 | int error; | |
5565d79a DC |
667 | |
668 | /* | |
669 | * open code the version check to avoid needing to convert the entire | |
670 | * superblock from disk order just to check the version number | |
671 | */ | |
672 | if (dsb->sb_magicnum == cpu_to_be32(XFS_SB_MAGIC) && | |
673 | (((be16_to_cpu(dsb->sb_versionnum) & XFS_SB_VERSION_NUMBITS) == | |
674 | XFS_SB_VERSION_5) || | |
675 | dsb->sb_crc != 0)) { | |
676 | ||
d21ca64d | 677 | if (!xfs_buf_verify_cksum(bp, XFS_SB_CRC_OFF)) { |
46ea3a62 | 678 | /* Only fail bad secondaries on a known V5 filesystem */ |
f3cddd91 | 679 | if (bp->b_bn == XFS_SB_DADDR || |
46ea3a62 | 680 | xfs_sb_version_hascrc(&mp->m_sb)) { |
12b53197 | 681 | error = -EFSBADCRC; |
46ea3a62 DC |
682 | goto out_error; |
683 | } | |
5565d79a DC |
684 | } |
685 | } | |
e2287707 DW |
686 | |
687 | /* | |
688 | * Check all the superblock fields. Don't byteswap the xquota flags | |
689 | * because _verify_common checks the on-disk values. | |
690 | */ | |
691 | __xfs_sb_from_disk(&sb, XFS_BUF_TO_SBP(bp), false); | |
692 | error = xfs_validate_sb_common(mp, bp, &sb); | |
693 | if (error) | |
694 | goto out_error; | |
695 | error = xfs_validate_sb_read(mp, &sb); | |
5565d79a DC |
696 | |
697 | out_error: | |
7e6c95f1 | 698 | if (error == -EFSCORRUPTED || error == -EFSBADCRC) |
1e697959 | 699 | xfs_verifier_error(bp, error, __this_address); |
7e6c95f1 | 700 | else if (error) |
5565d79a | 701 | xfs_buf_ioerror(bp, error); |
a2ceac1f DC |
702 | } |
703 | ||
704 | /* | |
705 | * We may be probed for a filesystem match, so we may not want to emit | |
706 | * messages when the superblock buffer is not actually an XFS superblock. | |
4896e6c8 | 707 | * If we find an XFS superblock, then run a normal, noisy mount because we are |
a2ceac1f DC |
708 | * really going to mount it and want to know about errors. |
709 | */ | |
710 | static void | |
711 | xfs_sb_quiet_read_verify( | |
712 | struct xfs_buf *bp) | |
713 | { | |
5565d79a | 714 | struct xfs_dsb *dsb = XFS_BUF_TO_SBP(bp); |
a2ceac1f | 715 | |
5565d79a | 716 | if (dsb->sb_magicnum == cpu_to_be32(XFS_SB_MAGIC)) { |
a2ceac1f DC |
717 | /* XFS filesystem, verify noisily! */ |
718 | xfs_sb_read_verify(bp); | |
719 | return; | |
720 | } | |
721 | /* quietly fail */ | |
12b53197 | 722 | xfs_buf_ioerror(bp, -EWRONGFS); |
a2ceac1f DC |
723 | } |
724 | ||
725 | static void | |
726 | xfs_sb_write_verify( | |
5565d79a | 727 | struct xfs_buf *bp) |
a2ceac1f | 728 | { |
e2287707 | 729 | struct xfs_sb sb; |
5565d79a | 730 | struct xfs_mount *mp = bp->b_target->bt_mount; |
37d086ca | 731 | struct xfs_buf_log_item *bip = bp->b_log_item; |
5565d79a DC |
732 | int error; |
733 | ||
e2287707 DW |
734 | /* |
735 | * Check all the superblock fields. Don't byteswap the xquota flags | |
736 | * because _verify_common checks the on-disk values. | |
737 | */ | |
738 | __xfs_sb_from_disk(&sb, XFS_BUF_TO_SBP(bp), false); | |
739 | error = xfs_validate_sb_common(mp, bp, &sb); | |
740 | if (error) | |
741 | goto out_error; | |
bc226d36 | 742 | error = xfs_validate_sb_write(mp, bp, &sb); |
e2287707 DW |
743 | if (error) |
744 | goto out_error; | |
5565d79a DC |
745 | |
746 | if (!xfs_sb_version_hascrc(&mp->m_sb)) | |
747 | return; | |
748 | ||
749 | if (bip) | |
750 | XFS_BUF_TO_SBP(bp)->sb_lsn = cpu_to_be64(bip->bli_item.li_lsn); | |
751 | ||
43b5aeed | 752 | xfs_buf_update_cksum(bp, XFS_SB_CRC_OFF); |
e2287707 DW |
753 | return; |
754 | ||
755 | out_error: | |
756 | xfs_verifier_error(bp, error, __this_address); | |
a2ceac1f DC |
757 | } |
758 | ||
759 | const struct xfs_buf_ops xfs_sb_buf_ops = { | |
a3fac935 | 760 | .name = "xfs_sb", |
a2ceac1f DC |
761 | .verify_read = xfs_sb_read_verify, |
762 | .verify_write = xfs_sb_write_verify, | |
763 | }; | |
764 | ||
4896e6c8 | 765 | const struct xfs_buf_ops xfs_sb_quiet_buf_ops = { |
a3fac935 | 766 | .name = "xfs_sb_quiet", |
a2ceac1f DC |
767 | .verify_read = xfs_sb_quiet_read_verify, |
768 | .verify_write = xfs_sb_write_verify, | |
769 | }; | |
770 | ||
5e656dbb BN |
771 | /* |
772 | * xfs_mount_common | |
773 | * | |
774 | * Mount initialization code establishing various mount | |
775 | * fields from the superblock associated with the given | |
776 | * mount structure | |
5e656dbb BN |
777 | */ |
778 | void | |
4896e6c8 DC |
779 | xfs_sb_mount_common( |
780 | struct xfs_mount *mp, | |
781 | struct xfs_sb *sbp) | |
5e656dbb | 782 | { |
5e656dbb | 783 | mp->m_agfrotor = mp->m_agirotor = 0; |
5e656dbb BN |
784 | mp->m_maxagi = mp->m_sb.sb_agcount; |
785 | mp->m_blkbit_log = sbp->sb_blocklog + XFS_NBBYLOG; | |
786 | mp->m_blkbb_log = sbp->sb_blocklog - BBSHIFT; | |
787 | mp->m_sectbb_log = sbp->sb_sectlog - BBSHIFT; | |
788 | mp->m_agno_log = xfs_highbit32(sbp->sb_agcount - 1) + 1; | |
789 | mp->m_agino_log = sbp->sb_inopblog + sbp->sb_agblklog; | |
5e656dbb BN |
790 | mp->m_blockmask = sbp->sb_blocksize - 1; |
791 | mp->m_blockwsize = sbp->sb_blocksize >> XFS_WORDLOG; | |
792 | mp->m_blockwmask = mp->m_blockwsize - 1; | |
5e656dbb | 793 | |
b3563c19 BN |
794 | mp->m_alloc_mxr[0] = xfs_allocbt_maxrecs(mp, sbp->sb_blocksize, 1); |
795 | mp->m_alloc_mxr[1] = xfs_allocbt_maxrecs(mp, sbp->sb_blocksize, 0); | |
796 | mp->m_alloc_mnr[0] = mp->m_alloc_mxr[0] / 2; | |
797 | mp->m_alloc_mnr[1] = mp->m_alloc_mxr[1] / 2; | |
798 | ||
799 | mp->m_inobt_mxr[0] = xfs_inobt_maxrecs(mp, sbp->sb_blocksize, 1); | |
800 | mp->m_inobt_mxr[1] = xfs_inobt_maxrecs(mp, sbp->sb_blocksize, 0); | |
801 | mp->m_inobt_mnr[0] = mp->m_inobt_mxr[0] / 2; | |
802 | mp->m_inobt_mnr[1] = mp->m_inobt_mxr[1] / 2; | |
803 | ||
804 | mp->m_bmap_dmxr[0] = xfs_bmbt_maxrecs(mp, sbp->sb_blocksize, 1); | |
805 | mp->m_bmap_dmxr[1] = xfs_bmbt_maxrecs(mp, sbp->sb_blocksize, 0); | |
806 | mp->m_bmap_dmnr[0] = mp->m_bmap_dmxr[0] / 2; | |
807 | mp->m_bmap_dmnr[1] = mp->m_bmap_dmxr[1] / 2; | |
5e656dbb | 808 | |
1421de38 ES |
809 | mp->m_rmap_mxr[0] = xfs_rmapbt_maxrecs(sbp->sb_blocksize, 1); |
810 | mp->m_rmap_mxr[1] = xfs_rmapbt_maxrecs(sbp->sb_blocksize, 0); | |
b3a96b46 DW |
811 | mp->m_rmap_mnr[0] = mp->m_rmap_mxr[0] / 2; |
812 | mp->m_rmap_mnr[1] = mp->m_rmap_mxr[1] / 2; | |
813 | ||
1421de38 ES |
814 | mp->m_refc_mxr[0] = xfs_refcountbt_maxrecs(sbp->sb_blocksize, true); |
815 | mp->m_refc_mxr[1] = xfs_refcountbt_maxrecs(sbp->sb_blocksize, false); | |
d8079fe0 DW |
816 | mp->m_refc_mnr[0] = mp->m_refc_mxr[0] / 2; |
817 | mp->m_refc_mnr[1] = mp->m_refc_mxr[1] / 2; | |
818 | ||
5e656dbb | 819 | mp->m_bsize = XFS_FSB_TO_BB(mp, 1); |
d7ff12b8 | 820 | mp->m_ialloc_inos = max_t(uint16_t, XFS_INODES_PER_CHUNK, |
5e656dbb BN |
821 | sbp->sb_inopblock); |
822 | mp->m_ialloc_blks = mp->m_ialloc_inos >> sbp->sb_inopblog; | |
62dc6cdb BF |
823 | |
824 | if (sbp->sb_spino_align) | |
825 | mp->m_ialloc_min_blks = sbp->sb_spino_align; | |
826 | else | |
827 | mp->m_ialloc_min_blks = mp->m_ialloc_blks; | |
b8a8d6e5 DW |
828 | mp->m_alloc_set_aside = xfs_alloc_set_aside(mp); |
829 | mp->m_ag_max_usable = xfs_alloc_ag_max_usable(mp); | |
5e656dbb BN |
830 | } |
831 | ||
cdded3d8 DC |
832 | /* |
833 | * xfs_initialize_perag_data | |
834 | * | |
835 | * Read in each per-ag structure so we can count up the number of | |
836 | * allocated inodes, free inodes and used filesystem blocks as this | |
837 | * information is no longer persistent in the superblock. Once we have | |
838 | * this information, write it into the in-core superblock structure. | |
839 | */ | |
5e656dbb | 840 | int |
4896e6c8 DC |
841 | xfs_initialize_perag_data( |
842 | struct xfs_mount *mp, | |
843 | xfs_agnumber_t agcount) | |
cdded3d8 DC |
844 | { |
845 | xfs_agnumber_t index; | |
846 | xfs_perag_t *pag; | |
847 | xfs_sb_t *sbp = &mp->m_sb; | |
5e656dbb BN |
848 | uint64_t ifree = 0; |
849 | uint64_t ialloc = 0; | |
850 | uint64_t bfree = 0; | |
851 | uint64_t bfreelst = 0; | |
852 | uint64_t btree = 0; | |
52f4e126 | 853 | uint64_t fdblocks; |
cdded3d8 | 854 | int error; |
cdded3d8 DC |
855 | |
856 | for (index = 0; index < agcount; index++) { | |
857 | /* | |
858 | * read the agf, then the agi. This gets us | |
56b2de80 | 859 | * all the information we need and populates the |
cdded3d8 DC |
860 | * per-ag structures for us. |
861 | */ | |
862 | error = xfs_alloc_pagf_init(mp, NULL, index, 0); | |
863 | if (error) | |
864 | return error; | |
865 | ||
866 | error = xfs_ialloc_pagi_init(mp, NULL, index); | |
867 | if (error) | |
868 | return error; | |
56b2de80 | 869 | pag = xfs_perag_get(mp, index); |
cdded3d8 DC |
870 | ifree += pag->pagi_freecount; |
871 | ialloc += pag->pagi_count; | |
872 | bfree += pag->pagf_freeblks; | |
873 | bfreelst += pag->pagf_flcount; | |
874 | btree += pag->pagf_btreeblks; | |
56b2de80 | 875 | xfs_perag_put(pag); |
cdded3d8 | 876 | } |
52f4e126 DW |
877 | fdblocks = bfree + bfreelst + btree; |
878 | ||
879 | /* | |
880 | * If the new summary counts are obviously incorrect, fail the | |
881 | * mount operation because that implies the AGFs are also corrupt. | |
882 | * Clear BAD_SUMMARY so that we don't unmount with a dirty log, which | |
883 | * will prevent xfs_repair from fixing anything. | |
884 | */ | |
885 | if (fdblocks > sbp->sb_dblocks || ifree > ialloc) { | |
886 | xfs_alert(mp, "AGF corruption. Please run xfs_repair."); | |
887 | error = -EFSCORRUPTED; | |
888 | goto out; | |
889 | } | |
19ebedcf DC |
890 | |
891 | /* Overwrite incore superblock counters with just-read data */ | |
5e656dbb | 892 | spin_lock(&mp->m_sb_lock); |
cdded3d8 DC |
893 | sbp->sb_ifree = ifree; |
894 | sbp->sb_icount = ialloc; | |
52f4e126 | 895 | sbp->sb_fdblocks = fdblocks; |
5e656dbb BN |
896 | spin_unlock(&mp->m_sb_lock); |
897 | ||
19ebedcf | 898 | xfs_reinit_percpu_counters(mp); |
52f4e126 DW |
899 | out: |
900 | mp->m_flags &= ~XFS_MOUNT_BAD_SUMMARY; | |
901 | return error; | |
cdded3d8 | 902 | } |
5e656dbb BN |
903 | |
904 | /* | |
19ebedcf DC |
905 | * xfs_log_sb() can be used to copy arbitrary changes to the in-core superblock |
906 | * into the superblock buffer to be logged. It does not provide the higher | |
907 | * level of locking that is needed to protect the in-core superblock from | |
908 | * concurrent access. | |
5e656dbb BN |
909 | */ |
910 | void | |
19ebedcf DC |
911 | xfs_log_sb( |
912 | struct xfs_trans *tp) | |
5e656dbb | 913 | { |
19ebedcf DC |
914 | struct xfs_mount *mp = tp->t_mountp; |
915 | struct xfs_buf *bp = xfs_trans_getsb(tp, mp, 0); | |
5e656dbb | 916 | |
19ebedcf DC |
917 | mp->m_sb.sb_icount = percpu_counter_sum(&mp->m_icount); |
918 | mp->m_sb.sb_ifree = percpu_counter_sum(&mp->m_ifree); | |
919 | mp->m_sb.sb_fdblocks = percpu_counter_sum(&mp->m_fdblocks); | |
4896e6c8 | 920 | |
19ebedcf DC |
921 | xfs_sb_to_disk(XFS_BUF_TO_SBP(bp), &mp->m_sb); |
922 | xfs_trans_buf_set_type(tp, bp, XFS_BLFT_SB_BUF); | |
923 | xfs_trans_log_buf(tp, bp, 0, sizeof(struct xfs_dsb)); | |
924 | } | |
5e656dbb | 925 | |
19ebedcf DC |
926 | /* |
927 | * xfs_sync_sb | |
928 | * | |
929 | * Sync the superblock to disk. | |
930 | * | |
931 | * Note that the caller is responsible for checking the frozen state of the | |
932 | * filesystem. This procedure uses the non-blocking transaction allocator and | |
933 | * thus will allow modifications to a frozen fs. This is required because this | |
934 | * code can be called during the process of freezing where use of the high-level | |
935 | * allocator would deadlock. | |
936 | */ | |
937 | int | |
938 | xfs_sync_sb( | |
939 | struct xfs_mount *mp, | |
940 | bool wait) | |
941 | { | |
942 | struct xfs_trans *tp; | |
943 | int error; | |
5e656dbb | 944 | |
9074815c CH |
945 | error = xfs_trans_alloc(mp, &M_RES(mp)->tr_sb, 0, 0, |
946 | XFS_TRANS_NO_WRITECOUNT, &tp); | |
947 | if (error) | |
19ebedcf | 948 | return error; |
5e656dbb | 949 | |
19ebedcf DC |
950 | xfs_log_sb(tp); |
951 | if (wait) | |
952 | xfs_trans_set_sync(tp); | |
de5a3f46 | 953 | return xfs_trans_commit(tp); |
5e656dbb | 954 | } |
a2a52384 | 955 | |
971ce259 DC |
956 | /* |
957 | * Update all the secondary superblocks to match the new state of the primary. | |
958 | * Because we are completely overwriting all the existing fields in the | |
959 | * secondary superblock buffers, there is no need to read them in from disk. | |
960 | * Just get a new buffer, stamp it and write it. | |
961 | * | |
962 | * The sb buffers need to be cached here so that we serialise against other | |
963 | * operations that access the secondary superblocks, but we don't want to keep | |
964 | * them in memory once it is written so we mark it as a one-shot buffer. | |
965 | */ | |
966 | int | |
967 | xfs_update_secondary_sbs( | |
968 | struct xfs_mount *mp) | |
969 | { | |
970 | xfs_agnumber_t agno; | |
971 | int saved_error = 0; | |
972 | int error = 0; | |
973 | LIST_HEAD (buffer_list); | |
974 | ||
975 | /* update secondary superblocks. */ | |
976 | for (agno = 1; agno < mp->m_sb.sb_agcount; agno++) { | |
977 | struct xfs_buf *bp; | |
978 | ||
979 | bp = xfs_buf_get(mp->m_ddev_targp, | |
980 | XFS_AG_DADDR(mp, agno, XFS_SB_DADDR), | |
981 | XFS_FSS_TO_BB(mp, 1), 0); | |
982 | /* | |
983 | * If we get an error reading or writing alternate superblocks, | |
984 | * continue. xfs_repair chooses the "best" superblock based | |
985 | * on most matches; if we break early, we'll leave more | |
986 | * superblocks un-updated than updated, and xfs_repair may | |
987 | * pick them over the properly-updated primary. | |
988 | */ | |
989 | if (!bp) { | |
990 | xfs_warn(mp, | |
991 | "error allocating secondary superblock for ag %d", | |
992 | agno); | |
993 | if (!saved_error) | |
994 | saved_error = -ENOMEM; | |
995 | continue; | |
996 | } | |
997 | ||
998 | bp->b_ops = &xfs_sb_buf_ops; | |
999 | xfs_buf_oneshot(bp); | |
1000 | xfs_buf_zero(bp, 0, BBTOB(bp->b_length)); | |
1001 | xfs_sb_to_disk(XFS_BUF_TO_SBP(bp), &mp->m_sb); | |
1002 | xfs_buf_delwri_queue(bp, &buffer_list); | |
1003 | xfs_buf_relse(bp); | |
1004 | ||
1005 | /* don't hold too many buffers at once */ | |
1006 | if (agno % 16) | |
1007 | continue; | |
1008 | ||
1009 | error = xfs_buf_delwri_submit(&buffer_list); | |
1010 | if (error) { | |
1011 | xfs_warn(mp, | |
1012 | "write error %d updating a secondary superblock near ag %d", | |
1013 | error, agno); | |
1014 | if (!saved_error) | |
1015 | saved_error = error; | |
1016 | continue; | |
1017 | } | |
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 | } | |
1025 | ||
1026 | return saved_error ? saved_error : error; | |
1027 | } | |
1028 | ||
691fdd72 ES |
1029 | /* |
1030 | * Same behavior as xfs_sync_sb, except that it is always synchronous and it | |
1031 | * also writes the superblock buffer to disk sector 0 immediately. | |
1032 | */ | |
1033 | int | |
1034 | xfs_sync_sb_buf( | |
1035 | struct xfs_mount *mp) | |
1036 | { | |
1037 | struct xfs_trans *tp; | |
1038 | struct xfs_buf *bp; | |
1039 | int error; | |
1040 | ||
1041 | error = xfs_trans_alloc(mp, &M_RES(mp)->tr_sb, 0, 0, 0, &tp); | |
1042 | if (error) | |
1043 | return error; | |
1044 | ||
1045 | bp = xfs_trans_getsb(tp, mp, 0); | |
1046 | xfs_log_sb(tp); | |
1047 | xfs_trans_bhold(tp, bp); | |
1048 | xfs_trans_set_sync(tp); | |
1049 | error = xfs_trans_commit(tp); | |
1050 | if (error) | |
1051 | goto out; | |
1052 | /* | |
1053 | * write out the sb buffer to get the changes to disk | |
1054 | */ | |
1055 | error = xfs_bwrite(bp); | |
1056 | out: | |
1057 | xfs_buf_relse(bp); | |
1058 | return error; | |
1059 | } | |
1060 | ||
a2a52384 DW |
1061 | int |
1062 | xfs_fs_geometry( | |
fdef0e8b DW |
1063 | struct xfs_sb *sbp, |
1064 | struct xfs_fsop_geom *geo, | |
1065 | int struct_version) | |
a2a52384 | 1066 | { |
fdef0e8b DW |
1067 | memset(geo, 0, sizeof(struct xfs_fsop_geom)); |
1068 | ||
1069 | geo->blocksize = sbp->sb_blocksize; | |
1070 | geo->rtextsize = sbp->sb_rextsize; | |
1071 | geo->agblocks = sbp->sb_agblocks; | |
1072 | geo->agcount = sbp->sb_agcount; | |
1073 | geo->logblocks = sbp->sb_logblocks; | |
1074 | geo->sectsize = sbp->sb_sectsize; | |
1075 | geo->inodesize = sbp->sb_inodesize; | |
1076 | geo->imaxpct = sbp->sb_imax_pct; | |
1077 | geo->datablocks = sbp->sb_dblocks; | |
1078 | geo->rtblocks = sbp->sb_rblocks; | |
1079 | geo->rtextents = sbp->sb_rextents; | |
1080 | geo->logstart = sbp->sb_logstart; | |
1081 | BUILD_BUG_ON(sizeof(geo->uuid) != sizeof(sbp->sb_uuid)); | |
1082 | memcpy(geo->uuid, &sbp->sb_uuid, sizeof(sbp->sb_uuid)); | |
1083 | ||
1084 | if (struct_version < 2) | |
1085 | return 0; | |
1086 | ||
1087 | geo->sunit = sbp->sb_unit; | |
1088 | geo->swidth = sbp->sb_width; | |
1089 | ||
1090 | if (struct_version < 3) | |
1091 | return 0; | |
1092 | ||
1093 | geo->version = XFS_FSOP_GEOM_VERSION; | |
1094 | geo->flags = XFS_FSOP_GEOM_FLAGS_NLINK | | |
b7fdeb4d CH |
1095 | XFS_FSOP_GEOM_FLAGS_DIRV2 | |
1096 | XFS_FSOP_GEOM_FLAGS_EXTFLG; | |
fdef0e8b DW |
1097 | if (xfs_sb_version_hasattr(sbp)) |
1098 | geo->flags |= XFS_FSOP_GEOM_FLAGS_ATTR; | |
1099 | if (xfs_sb_version_hasquota(sbp)) | |
1100 | geo->flags |= XFS_FSOP_GEOM_FLAGS_QUOTA; | |
1101 | if (xfs_sb_version_hasalign(sbp)) | |
1102 | geo->flags |= XFS_FSOP_GEOM_FLAGS_IALIGN; | |
1103 | if (xfs_sb_version_hasdalign(sbp)) | |
1104 | geo->flags |= XFS_FSOP_GEOM_FLAGS_DALIGN; | |
fdef0e8b DW |
1105 | if (xfs_sb_version_hassector(sbp)) |
1106 | geo->flags |= XFS_FSOP_GEOM_FLAGS_SECTOR; | |
1107 | if (xfs_sb_version_hasasciici(sbp)) | |
1108 | geo->flags |= XFS_FSOP_GEOM_FLAGS_DIRV2CI; | |
1109 | if (xfs_sb_version_haslazysbcount(sbp)) | |
1110 | geo->flags |= XFS_FSOP_GEOM_FLAGS_LAZYSB; | |
1111 | if (xfs_sb_version_hasattr2(sbp)) | |
1112 | geo->flags |= XFS_FSOP_GEOM_FLAGS_ATTR2; | |
1113 | if (xfs_sb_version_hasprojid32bit(sbp)) | |
1114 | geo->flags |= XFS_FSOP_GEOM_FLAGS_PROJID32; | |
1115 | if (xfs_sb_version_hascrc(sbp)) | |
1116 | geo->flags |= XFS_FSOP_GEOM_FLAGS_V5SB; | |
1117 | if (xfs_sb_version_hasftype(sbp)) | |
1118 | geo->flags |= XFS_FSOP_GEOM_FLAGS_FTYPE; | |
1119 | if (xfs_sb_version_hasfinobt(sbp)) | |
1120 | geo->flags |= XFS_FSOP_GEOM_FLAGS_FINOBT; | |
1121 | if (xfs_sb_version_hassparseinodes(sbp)) | |
1122 | geo->flags |= XFS_FSOP_GEOM_FLAGS_SPINODES; | |
1123 | if (xfs_sb_version_hasrmapbt(sbp)) | |
1124 | geo->flags |= XFS_FSOP_GEOM_FLAGS_RMAPBT; | |
1125 | if (xfs_sb_version_hasreflink(sbp)) | |
1126 | geo->flags |= XFS_FSOP_GEOM_FLAGS_REFLINK; | |
1127 | if (xfs_sb_version_hassector(sbp)) | |
1128 | geo->logsectsize = sbp->sb_logsectsize; | |
1129 | else | |
1130 | geo->logsectsize = BBSIZE; | |
1131 | geo->rtsectsize = sbp->sb_blocksize; | |
1132 | geo->dirblocksize = xfs_dir2_dirblock_bytes(sbp); | |
1133 | ||
dfcfc5f1 | 1134 | if (struct_version < 4) |
fdef0e8b DW |
1135 | return 0; |
1136 | ||
1137 | if (xfs_sb_version_haslogv2(sbp)) | |
1138 | geo->flags |= XFS_FSOP_GEOM_FLAGS_LOGV2; | |
1139 | ||
1140 | geo->logsunit = sbp->sb_logsunit; | |
a2a52384 | 1141 | |
a2a52384 DW |
1142 | return 0; |
1143 | } | |
17d741a8 DW |
1144 | |
1145 | /* Read a secondary superblock. */ | |
1146 | int | |
1147 | xfs_sb_read_secondary( | |
1148 | struct xfs_mount *mp, | |
1149 | struct xfs_trans *tp, | |
1150 | xfs_agnumber_t agno, | |
1151 | struct xfs_buf **bpp) | |
1152 | { | |
1153 | struct xfs_buf *bp; | |
1154 | int error; | |
1155 | ||
1156 | ASSERT(agno != 0 && agno != NULLAGNUMBER); | |
1157 | error = xfs_trans_read_buf(mp, tp, mp->m_ddev_targp, | |
1158 | XFS_AG_DADDR(mp, agno, XFS_SB_BLOCK(mp)), | |
1159 | XFS_FSS_TO_BB(mp, 1), 0, &bp, &xfs_sb_buf_ops); | |
1160 | if (error) | |
1161 | return error; | |
1162 | xfs_buf_set_ref(bp, XFS_SSB_REF); | |
1163 | *bpp = bp; | |
1164 | return 0; | |
1165 | } | |
b153fb40 DW |
1166 | |
1167 | /* Get an uninitialised secondary superblock buffer. */ | |
1168 | int | |
1169 | xfs_sb_get_secondary( | |
1170 | struct xfs_mount *mp, | |
1171 | struct xfs_trans *tp, | |
1172 | xfs_agnumber_t agno, | |
1173 | struct xfs_buf **bpp) | |
1174 | { | |
1175 | struct xfs_buf *bp; | |
1176 | ||
1177 | ASSERT(agno != 0 && agno != NULLAGNUMBER); | |
1178 | bp = xfs_trans_get_buf(tp, mp->m_ddev_targp, | |
1179 | XFS_AG_DADDR(mp, agno, XFS_SB_BLOCK(mp)), | |
1180 | XFS_FSS_TO_BB(mp, 1), 0); | |
1181 | if (!bp) | |
1182 | return -ENOMEM; | |
1183 | bp->b_ops = &xfs_sb_buf_ops; | |
1184 | xfs_buf_oneshot(bp); | |
1185 | *bpp = bp; | |
1186 | return 0; | |
1187 | } |