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0b61f8a4 | 1 | // SPDX-License-Identifier: GPL-2.0 |
ff55068c DC |
2 | /* |
3 | * Copyright (c) 2000-2005 Silicon Graphics, Inc. | |
4 | * All Rights Reserved. | |
ff55068c DC |
5 | */ |
6 | #include "xfs.h" | |
7 | #include "xfs_fs.h" | |
632b89e8 | 8 | #include "xfs_shared.h" |
ff55068c | 9 | #include "xfs_format.h" |
239880ef DC |
10 | #include "xfs_log_format.h" |
11 | #include "xfs_trans_resv.h" | |
ff55068c | 12 | #include "xfs_bit.h" |
5f213ddb | 13 | #include "xfs_sb.h" |
ff55068c | 14 | #include "xfs_mount.h" |
ff55068c DC |
15 | #include "xfs_ialloc.h" |
16 | #include "xfs_alloc.h" | |
ff55068c | 17 | #include "xfs_error.h" |
239880ef | 18 | #include "xfs_trans.h" |
ff55068c | 19 | #include "xfs_buf_item.h" |
a4fbe6ab DC |
20 | #include "xfs_bmap_btree.h" |
21 | #include "xfs_alloc_btree.h" | |
a45086e2 | 22 | #include "xfs_log.h" |
035e00ac | 23 | #include "xfs_rmap_btree.h" |
1946b91c | 24 | #include "xfs_refcount_btree.h" |
c368ebcd | 25 | #include "xfs_da_format.h" |
39353ff6 | 26 | #include "xfs_health.h" |
7f8d3b3c | 27 | #include "xfs_ag.h" |
ff55068c DC |
28 | |
29 | /* | |
30 | * Physical superblock buffer manipulations. Shared with libxfs in userspace. | |
31 | */ | |
32 | ||
f0f5f658 DC |
33 | /* |
34 | * Check that all the V4 feature bits that the V5 filesystem format requires are | |
35 | * correctly set. | |
36 | */ | |
37 | static bool | |
38 | xfs_sb_validate_v5_features( | |
39 | struct xfs_sb *sbp) | |
40 | { | |
41 | /* We must not have any unknown V4 feature bits set */ | |
42 | if (sbp->sb_versionnum & ~XFS_SB_VERSION_OKBITS) | |
43 | return false; | |
44 | ||
45 | /* | |
46 | * The CRC bit is considered an invalid V4 flag, so we have to add it | |
47 | * manually to the OKBITS mask. | |
48 | */ | |
49 | if (sbp->sb_features2 & ~(XFS_SB_VERSION2_OKBITS | | |
50 | XFS_SB_VERSION2_CRCBIT)) | |
51 | return false; | |
52 | ||
53 | /* Now check all the required V4 feature flags are set. */ | |
54 | ||
55 | #define V5_VERS_FLAGS (XFS_SB_VERSION_NLINKBIT | \ | |
56 | XFS_SB_VERSION_ALIGNBIT | \ | |
57 | XFS_SB_VERSION_LOGV2BIT | \ | |
58 | XFS_SB_VERSION_EXTFLGBIT | \ | |
59 | XFS_SB_VERSION_DIRV2BIT | \ | |
60 | XFS_SB_VERSION_MOREBITSBIT) | |
61 | ||
62 | #define V5_FEAT_FLAGS (XFS_SB_VERSION2_LAZYSBCOUNTBIT | \ | |
63 | XFS_SB_VERSION2_ATTR2BIT | \ | |
64 | XFS_SB_VERSION2_PROJID32BIT | \ | |
65 | XFS_SB_VERSION2_CRCBIT) | |
66 | ||
67 | if ((sbp->sb_versionnum & V5_VERS_FLAGS) != V5_VERS_FLAGS) | |
68 | return false; | |
69 | if ((sbp->sb_features2 & V5_FEAT_FLAGS) != V5_FEAT_FLAGS) | |
70 | return false; | |
71 | return true; | |
72 | } | |
73 | ||
fe08cc50 | 74 | /* |
aa880198 DC |
75 | * We current support XFS v5 formats with known features and v4 superblocks with |
76 | * at least V2 directories. | |
fe08cc50 DC |
77 | */ |
78 | bool | |
79 | xfs_sb_good_version( | |
80 | struct xfs_sb *sbp) | |
81 | { | |
f0f5f658 DC |
82 | /* |
83 | * All v5 filesystems are supported, but we must check that all the | |
84 | * required v4 feature flags are enabled correctly as the code checks | |
85 | * those flags and not for v5 support. | |
86 | */ | |
d6837c1a | 87 | if (xfs_sb_is_v5(sbp)) |
f0f5f658 DC |
88 | return xfs_sb_validate_v5_features(sbp); |
89 | ||
aa880198 DC |
90 | /* versions prior to v4 are not supported */ |
91 | if (XFS_SB_VERSION_NUM(sbp) != XFS_SB_VERSION_4) | |
92 | return false; | |
93 | ||
f0f5f658 DC |
94 | /* We must not have any unknown v4 feature bits set */ |
95 | if ((sbp->sb_versionnum & ~XFS_SB_VERSION_OKBITS) || | |
96 | ((sbp->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT) && | |
97 | (sbp->sb_features2 & ~XFS_SB_VERSION2_OKBITS))) | |
98 | return false; | |
fe08cc50 | 99 | |
fe08cc50 DC |
100 | /* V4 filesystems need v2 directories and unwritten extents */ |
101 | if (!(sbp->sb_versionnum & XFS_SB_VERSION_DIRV2BIT)) | |
102 | return false; | |
103 | if (!(sbp->sb_versionnum & XFS_SB_VERSION_EXTFLGBIT)) | |
104 | return false; | |
105 | ||
fe08cc50 DC |
106 | /* It's a supported v4 filesystem */ |
107 | return true; | |
108 | } | |
109 | ||
a1d86e8d DC |
110 | uint64_t |
111 | xfs_sb_version_to_features( | |
112 | struct xfs_sb *sbp) | |
113 | { | |
114 | uint64_t features = 0; | |
115 | ||
116 | /* optional V4 features */ | |
117 | if (sbp->sb_rblocks > 0) | |
118 | features |= XFS_FEAT_REALTIME; | |
dd0d2f97 DC |
119 | if (sbp->sb_versionnum & XFS_SB_VERSION_NLINKBIT) |
120 | features |= XFS_FEAT_NLINK; | |
a1d86e8d DC |
121 | if (sbp->sb_versionnum & XFS_SB_VERSION_ATTRBIT) |
122 | features |= XFS_FEAT_ATTR; | |
123 | if (sbp->sb_versionnum & XFS_SB_VERSION_QUOTABIT) | |
124 | features |= XFS_FEAT_QUOTA; | |
125 | if (sbp->sb_versionnum & XFS_SB_VERSION_ALIGNBIT) | |
126 | features |= XFS_FEAT_ALIGN; | |
127 | if (sbp->sb_versionnum & XFS_SB_VERSION_LOGV2BIT) | |
128 | features |= XFS_FEAT_LOGV2; | |
129 | if (sbp->sb_versionnum & XFS_SB_VERSION_DALIGNBIT) | |
130 | features |= XFS_FEAT_DALIGN; | |
131 | if (sbp->sb_versionnum & XFS_SB_VERSION_EXTFLGBIT) | |
132 | features |= XFS_FEAT_EXTFLG; | |
133 | if (sbp->sb_versionnum & XFS_SB_VERSION_SECTORBIT) | |
134 | features |= XFS_FEAT_SECTOR; | |
135 | if (sbp->sb_versionnum & XFS_SB_VERSION_BORGBIT) | |
136 | features |= XFS_FEAT_ASCIICI; | |
137 | if (sbp->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT) { | |
138 | if (sbp->sb_features2 & XFS_SB_VERSION2_LAZYSBCOUNTBIT) | |
139 | features |= XFS_FEAT_LAZYSBCOUNT; | |
140 | if (sbp->sb_features2 & XFS_SB_VERSION2_ATTR2BIT) | |
141 | features |= XFS_FEAT_ATTR2; | |
142 | if (sbp->sb_features2 & XFS_SB_VERSION2_PROJID32BIT) | |
143 | features |= XFS_FEAT_PROJID32; | |
144 | if (sbp->sb_features2 & XFS_SB_VERSION2_FTYPE) | |
145 | features |= XFS_FEAT_FTYPE; | |
146 | } | |
147 | ||
d6837c1a | 148 | if (!xfs_sb_is_v5(sbp)) |
a1d86e8d DC |
149 | return features; |
150 | ||
151 | /* Always on V5 features */ | |
152 | features |= XFS_FEAT_ALIGN | XFS_FEAT_LOGV2 | XFS_FEAT_EXTFLG | | |
153 | XFS_FEAT_LAZYSBCOUNT | XFS_FEAT_ATTR2 | XFS_FEAT_PROJID32 | | |
154 | XFS_FEAT_V3INODES | XFS_FEAT_CRC | XFS_FEAT_PQUOTINO; | |
155 | ||
156 | /* Optional V5 features */ | |
157 | if (sbp->sb_features_ro_compat & XFS_SB_FEAT_RO_COMPAT_FINOBT) | |
158 | features |= XFS_FEAT_FINOBT; | |
159 | if (sbp->sb_features_ro_compat & XFS_SB_FEAT_RO_COMPAT_RMAPBT) | |
160 | features |= XFS_FEAT_RMAPBT; | |
161 | if (sbp->sb_features_ro_compat & XFS_SB_FEAT_RO_COMPAT_REFLINK) | |
162 | features |= XFS_FEAT_REFLINK; | |
163 | if (sbp->sb_features_ro_compat & XFS_SB_FEAT_RO_COMPAT_INOBTCNT) | |
164 | features |= XFS_FEAT_INOBTCNT; | |
165 | if (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_FTYPE) | |
166 | features |= XFS_FEAT_FTYPE; | |
167 | if (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_SPINODES) | |
168 | features |= XFS_FEAT_SPINODES; | |
169 | if (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_META_UUID) | |
170 | features |= XFS_FEAT_META_UUID; | |
171 | if (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_BIGTIME) | |
172 | features |= XFS_FEAT_BIGTIME; | |
173 | if (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_NEEDSREPAIR) | |
174 | features |= XFS_FEAT_NEEDSREPAIR; | |
919819f5 CB |
175 | if (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_NREXT64) |
176 | features |= XFS_FEAT_NREXT64; | |
177 | ||
a1d86e8d DC |
178 | return features; |
179 | } | |
180 | ||
eca383fc | 181 | /* Check all the superblock fields we care about when reading one in. */ |
ff55068c | 182 | STATIC int |
eca383fc DW |
183 | xfs_validate_sb_read( |
184 | struct xfs_mount *mp, | |
185 | struct xfs_sb *sbp) | |
ff55068c | 186 | { |
d6837c1a | 187 | if (!xfs_sb_is_v5(sbp)) |
eca383fc | 188 | return 0; |
ff55068c DC |
189 | |
190 | /* | |
eca383fc DW |
191 | * Version 5 superblock feature mask validation. Reject combinations |
192 | * the kernel cannot support up front before checking anything else. | |
ff55068c | 193 | */ |
eca383fc DW |
194 | if (xfs_sb_has_compat_feature(sbp, XFS_SB_FEAT_COMPAT_UNKNOWN)) { |
195 | xfs_warn(mp, | |
f41febd2 | 196 | "Superblock has unknown compatible features (0x%x) enabled.", |
eca383fc DW |
197 | (sbp->sb_features_compat & XFS_SB_FEAT_COMPAT_UNKNOWN)); |
198 | xfs_warn(mp, | |
f41febd2 | 199 | "Using a more recent kernel is recommended."); |
eca383fc | 200 | } |
ff55068c | 201 | |
eca383fc DW |
202 | if (xfs_sb_has_ro_compat_feature(sbp, XFS_SB_FEAT_RO_COMPAT_UNKNOWN)) { |
203 | xfs_alert(mp, | |
ff55068c | 204 | "Superblock has unknown read-only compatible features (0x%x) enabled.", |
eca383fc DW |
205 | (sbp->sb_features_ro_compat & |
206 | XFS_SB_FEAT_RO_COMPAT_UNKNOWN)); | |
2e973b2c | 207 | if (!xfs_is_readonly(mp)) { |
eca383fc | 208 | xfs_warn(mp, |
f41febd2 | 209 | "Attempted to mount read-only compatible filesystem read-write."); |
eca383fc | 210 | xfs_warn(mp, |
ff55068c | 211 | "Filesystem can only be safely mounted read only."); |
f41febd2 | 212 | |
2451337d | 213 | return -EINVAL; |
ff55068c | 214 | } |
eca383fc DW |
215 | } |
216 | if (xfs_sb_has_incompat_feature(sbp, XFS_SB_FEAT_INCOMPAT_UNKNOWN)) { | |
217 | xfs_warn(mp, | |
218 | "Superblock has unknown incompatible features (0x%x) enabled.", | |
219 | (sbp->sb_features_incompat & | |
220 | XFS_SB_FEAT_INCOMPAT_UNKNOWN)); | |
221 | xfs_warn(mp, | |
222 | "Filesystem cannot be safely mounted by this kernel."); | |
223 | return -EINVAL; | |
224 | } | |
225 | ||
226 | return 0; | |
227 | } | |
228 | ||
229 | /* Check all the superblock fields we care about when writing one out. */ | |
230 | STATIC int | |
231 | xfs_validate_sb_write( | |
232 | struct xfs_mount *mp, | |
1f31c98d | 233 | struct xfs_buf *bp, |
eca383fc DW |
234 | struct xfs_sb *sbp) |
235 | { | |
8756a5af BD |
236 | /* |
237 | * Carry out additional sb summary counter sanity checks when we write | |
238 | * the superblock. We skip this in the read validator because there | |
239 | * could be newer superblocks in the log and if the values are garbage | |
69775fd1 | 240 | * even after replay we'll recalculate them at the end of log mount. |
1f31c98d DW |
241 | * |
242 | * mkfs has traditionally written zeroed counters to inprogress and | |
243 | * secondary superblocks, so allow this usage to continue because | |
244 | * we never read counters from such superblocks. | |
8756a5af | 245 | */ |
04fcad80 | 246 | if (xfs_buf_daddr(bp) == XFS_SB_DADDR && !sbp->sb_inprogress && |
1f31c98d DW |
247 | (sbp->sb_fdblocks > sbp->sb_dblocks || |
248 | !xfs_verify_icount(mp, sbp->sb_icount) || | |
249 | sbp->sb_ifree > sbp->sb_icount)) { | |
8756a5af BD |
250 | xfs_warn(mp, "SB summary counter sanity check failed"); |
251 | return -EFSCORRUPTED; | |
252 | } | |
253 | ||
d6837c1a | 254 | if (!xfs_sb_is_v5(sbp)) |
eca383fc DW |
255 | return 0; |
256 | ||
9e037cb7 DW |
257 | /* |
258 | * Version 5 superblock feature mask validation. Reject combinations | |
259 | * the kernel cannot support since we checked for unsupported bits in | |
260 | * the read verifier, which means that memory is corrupt. | |
261 | */ | |
262 | if (xfs_sb_has_compat_feature(sbp, XFS_SB_FEAT_COMPAT_UNKNOWN)) { | |
263 | xfs_warn(mp, | |
264 | "Corruption detected in superblock compatible features (0x%x)!", | |
265 | (sbp->sb_features_compat & XFS_SB_FEAT_COMPAT_UNKNOWN)); | |
266 | return -EFSCORRUPTED; | |
267 | } | |
268 | ||
74ad4693 DW |
269 | if (!xfs_is_readonly(mp) && |
270 | xfs_sb_has_ro_compat_feature(sbp, XFS_SB_FEAT_RO_COMPAT_UNKNOWN)) { | |
9e037cb7 DW |
271 | xfs_alert(mp, |
272 | "Corruption detected in superblock read-only compatible features (0x%x)!", | |
273 | (sbp->sb_features_ro_compat & | |
274 | XFS_SB_FEAT_RO_COMPAT_UNKNOWN)); | |
275 | return -EFSCORRUPTED; | |
276 | } | |
277 | if (xfs_sb_has_incompat_feature(sbp, XFS_SB_FEAT_INCOMPAT_UNKNOWN)) { | |
278 | xfs_warn(mp, | |
279 | "Corruption detected in superblock incompatible features (0x%x)!", | |
280 | (sbp->sb_features_incompat & | |
281 | XFS_SB_FEAT_INCOMPAT_UNKNOWN)); | |
282 | return -EFSCORRUPTED; | |
283 | } | |
284 | if (xfs_sb_has_incompat_log_feature(sbp, | |
285 | XFS_SB_FEAT_INCOMPAT_LOG_UNKNOWN)) { | |
286 | xfs_warn(mp, | |
287 | "Corruption detected in superblock incompatible log features (0x%x)!", | |
288 | (sbp->sb_features_log_incompat & | |
289 | XFS_SB_FEAT_INCOMPAT_LOG_UNKNOWN)); | |
290 | return -EFSCORRUPTED; | |
291 | } | |
eca383fc DW |
292 | |
293 | /* | |
294 | * We can't read verify the sb LSN because the read verifier is called | |
295 | * before the log is allocated and processed. We know the log is set up | |
296 | * before write verifier calls, so check it here. | |
297 | */ | |
298 | if (!xfs_log_check_lsn(mp, sbp->sb_lsn)) | |
299 | return -EFSCORRUPTED; | |
300 | ||
301 | return 0; | |
302 | } | |
303 | ||
304 | /* Check the validity of the SB. */ | |
305 | STATIC int | |
306 | xfs_validate_sb_common( | |
307 | struct xfs_mount *mp, | |
308 | struct xfs_buf *bp, | |
309 | struct xfs_sb *sbp) | |
310 | { | |
3e6e8afd | 311 | struct xfs_dsb *dsb = bp->b_addr; |
eca383fc DW |
312 | uint32_t agcount = 0; |
313 | uint32_t rem; | |
fe08cc50 | 314 | bool has_dalign; |
eca383fc | 315 | |
39708c20 | 316 | if (!xfs_verify_magic(bp, dsb->sb_magicnum)) { |
f0f5f658 DC |
317 | xfs_warn(mp, |
318 | "Superblock has bad magic number 0x%x. Not an XFS filesystem?", | |
319 | be32_to_cpu(dsb->sb_magicnum)); | |
eca383fc DW |
320 | return -EWRONGFS; |
321 | } | |
322 | ||
323 | if (!xfs_sb_good_version(sbp)) { | |
f0f5f658 DC |
324 | xfs_warn(mp, |
325 | "Superblock has unknown features enabled or corrupted feature masks."); | |
eca383fc | 326 | return -EWRONGFS; |
ff55068c DC |
327 | } |
328 | ||
fe08cc50 DC |
329 | /* |
330 | * Validate feature flags and state | |
331 | */ | |
d6837c1a | 332 | if (xfs_sb_is_v5(sbp)) { |
fe08cc50 DC |
333 | if (sbp->sb_blocksize < XFS_MIN_CRC_BLOCKSIZE) { |
334 | xfs_notice(mp, | |
335 | "Block size (%u bytes) too small for Version 5 superblock (minimum %d bytes)", | |
336 | sbp->sb_blocksize, XFS_MIN_CRC_BLOCKSIZE); | |
337 | return -EFSCORRUPTED; | |
338 | } | |
339 | ||
340 | /* V5 has a separate project quota inode */ | |
ff55068c DC |
341 | if (sbp->sb_qflags & (XFS_OQUOTA_ENFD | XFS_OQUOTA_CHKD)) { |
342 | xfs_notice(mp, | |
08e96e1a | 343 | "Version 5 of Super block has XFS_OQUOTA bits."); |
2451337d | 344 | return -EFSCORRUPTED; |
ff55068c | 345 | } |
fe08cc50 DC |
346 | |
347 | /* | |
348 | * Full inode chunks must be aligned to inode chunk size when | |
349 | * sparse inodes are enabled to support the sparse chunk | |
350 | * allocation algorithm and prevent overlapping inode records. | |
351 | */ | |
352 | if (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_SPINODES) { | |
353 | uint32_t align; | |
354 | ||
355 | align = XFS_INODES_PER_CHUNK * sbp->sb_inodesize | |
356 | >> sbp->sb_blocklog; | |
357 | if (sbp->sb_inoalignmt != align) { | |
358 | xfs_warn(mp, | |
359 | "Inode block alignment (%u) must match chunk size (%u) for sparse inodes.", | |
360 | sbp->sb_inoalignmt, align); | |
361 | return -EINVAL; | |
362 | } | |
363 | } | |
ff55068c DC |
364 | } else if (sbp->sb_qflags & (XFS_PQUOTA_ENFD | XFS_GQUOTA_ENFD | |
365 | XFS_PQUOTA_CHKD | XFS_GQUOTA_CHKD)) { | |
366 | xfs_notice(mp, | |
14506f7a | 367 | "Superblock earlier than Version 5 has XFS_{P|G}QUOTA_{ENFD|CHKD} bits."); |
2451337d | 368 | return -EFSCORRUPTED; |
ff55068c DC |
369 | } |
370 | ||
371 | if (unlikely( | |
372 | sbp->sb_logstart == 0 && mp->m_logdev_targp == mp->m_ddev_targp)) { | |
373 | xfs_warn(mp, | |
374 | "filesystem is marked as having an external log; " | |
375 | "specify logdev on the mount command line."); | |
2451337d | 376 | return -EINVAL; |
ff55068c DC |
377 | } |
378 | ||
379 | if (unlikely( | |
380 | sbp->sb_logstart != 0 && mp->m_logdev_targp != mp->m_ddev_targp)) { | |
381 | xfs_warn(mp, | |
382 | "filesystem is marked as having an internal log; " | |
383 | "do not specify logdev on the mount command line."); | |
2451337d | 384 | return -EINVAL; |
ff55068c DC |
385 | } |
386 | ||
4bb73d01 DW |
387 | /* Compute agcount for this number of dblocks and agblocks */ |
388 | if (sbp->sb_agblocks) { | |
389 | agcount = div_u64_rem(sbp->sb_dblocks, sbp->sb_agblocks, &rem); | |
390 | if (rem) | |
391 | agcount++; | |
392 | } | |
393 | ||
ff55068c DC |
394 | /* |
395 | * More sanity checking. Most of these were stolen directly from | |
396 | * xfs_repair. | |
397 | */ | |
398 | if (unlikely( | |
399 | sbp->sb_agcount <= 0 || | |
400 | sbp->sb_sectsize < XFS_MIN_SECTORSIZE || | |
401 | sbp->sb_sectsize > XFS_MAX_SECTORSIZE || | |
402 | sbp->sb_sectlog < XFS_MIN_SECTORSIZE_LOG || | |
403 | sbp->sb_sectlog > XFS_MAX_SECTORSIZE_LOG || | |
404 | sbp->sb_sectsize != (1 << sbp->sb_sectlog) || | |
405 | sbp->sb_blocksize < XFS_MIN_BLOCKSIZE || | |
406 | sbp->sb_blocksize > XFS_MAX_BLOCKSIZE || | |
407 | sbp->sb_blocklog < XFS_MIN_BLOCKSIZE_LOG || | |
408 | sbp->sb_blocklog > XFS_MAX_BLOCKSIZE_LOG || | |
409 | sbp->sb_blocksize != (1 << sbp->sb_blocklog) || | |
83d230eb | 410 | sbp->sb_dirblklog + sbp->sb_blocklog > XFS_MAX_BLOCKSIZE_LOG || |
ff55068c DC |
411 | sbp->sb_inodesize < XFS_DINODE_MIN_SIZE || |
412 | sbp->sb_inodesize > XFS_DINODE_MAX_SIZE || | |
413 | sbp->sb_inodelog < XFS_DINODE_MIN_LOG || | |
414 | sbp->sb_inodelog > XFS_DINODE_MAX_LOG || | |
415 | sbp->sb_inodesize != (1 << sbp->sb_inodelog) || | |
392c6de9 | 416 | sbp->sb_inopblock != howmany(sbp->sb_blocksize,sbp->sb_inodesize) || |
4bb73d01 DW |
417 | XFS_FSB_TO_B(mp, sbp->sb_agblocks) < XFS_MIN_AG_BYTES || |
418 | XFS_FSB_TO_B(mp, sbp->sb_agblocks) > XFS_MAX_AG_BYTES || | |
419 | sbp->sb_agblklog != xfs_highbit32(sbp->sb_agblocks - 1) + 1 || | |
420 | agcount == 0 || agcount != sbp->sb_agcount || | |
ff55068c DC |
421 | (sbp->sb_blocklog - sbp->sb_inodelog != sbp->sb_inopblog) || |
422 | (sbp->sb_rextsize * sbp->sb_blocksize > XFS_MAX_RTEXTSIZE) || | |
423 | (sbp->sb_rextsize * sbp->sb_blocksize < XFS_MIN_RTEXTSIZE) || | |
424 | (sbp->sb_imax_pct > 100 /* zero sb_imax_pct is valid */) || | |
425 | sbp->sb_dblocks == 0 || | |
426 | sbp->sb_dblocks > XFS_MAX_DBLOCKS(sbp) || | |
ab3e57b5 DC |
427 | sbp->sb_dblocks < XFS_MIN_DBLOCKS(sbp) || |
428 | sbp->sb_shared_vn != 0)) { | |
5ef11eb0 | 429 | xfs_notice(mp, "SB sanity check failed"); |
2451337d | 430 | return -EFSCORRUPTED; |
bec9d48d DW |
431 | } |
432 | ||
f1e1765a DC |
433 | /* |
434 | * Logs that are too large are not supported at all. Reject them | |
435 | * outright. Logs that are too small are tolerated on v4 filesystems, | |
436 | * but we can only check that when mounting the log. Hence we skip | |
437 | * those checks here. | |
438 | */ | |
439 | if (sbp->sb_logblocks > XFS_MAX_LOG_BLOCKS) { | |
440 | xfs_notice(mp, | |
441 | "Log size 0x%x blocks too large, maximum size is 0x%llx blocks", | |
442 | sbp->sb_logblocks, XFS_MAX_LOG_BLOCKS); | |
443 | return -EFSCORRUPTED; | |
444 | } | |
445 | ||
446 | if (XFS_FSB_TO_B(mp, sbp->sb_logblocks) > XFS_MAX_LOG_BYTES) { | |
447 | xfs_warn(mp, | |
448 | "log size 0x%llx bytes too large, maximum size is 0x%llx bytes", | |
449 | XFS_FSB_TO_B(mp, sbp->sb_logblocks), | |
450 | XFS_MAX_LOG_BYTES); | |
451 | return -EFSCORRUPTED; | |
452 | } | |
453 | ||
454 | /* | |
455 | * Do not allow filesystems with corrupted log sector or stripe units to | |
456 | * be mounted. We cannot safely size the iclogs or write to the log if | |
457 | * the log stripe unit is not valid. | |
458 | */ | |
459 | if (sbp->sb_versionnum & XFS_SB_VERSION_SECTORBIT) { | |
460 | if (sbp->sb_logsectsize != (1U << sbp->sb_logsectlog)) { | |
461 | xfs_notice(mp, | |
462 | "log sector size in bytes/log2 (0x%x/0x%x) must match", | |
463 | sbp->sb_logsectsize, 1U << sbp->sb_logsectlog); | |
464 | return -EFSCORRUPTED; | |
465 | } | |
466 | } else if (sbp->sb_logsectsize || sbp->sb_logsectlog) { | |
467 | xfs_notice(mp, | |
468 | "log sector size in bytes/log2 (0x%x/0x%x) are not zero", | |
469 | sbp->sb_logsectsize, sbp->sb_logsectlog); | |
470 | return -EFSCORRUPTED; | |
471 | } | |
472 | ||
473 | if (sbp->sb_logsunit > 1) { | |
474 | if (sbp->sb_logsunit % sbp->sb_blocksize) { | |
475 | xfs_notice(mp, | |
476 | "log stripe unit 0x%x bytes must be a multiple of block size", | |
477 | sbp->sb_logsunit); | |
478 | return -EFSCORRUPTED; | |
479 | } | |
480 | if (sbp->sb_logsunit > XLOG_MAX_RECORD_BSIZE) { | |
481 | xfs_notice(mp, | |
482 | "log stripe unit 0x%x bytes over maximum size (0x%x bytes)", | |
483 | sbp->sb_logsunit, XLOG_MAX_RECORD_BSIZE); | |
484 | return -EFSCORRUPTED; | |
485 | } | |
486 | } | |
487 | ||
f8e566c0 DW |
488 | /* Validate the realtime geometry; stolen from xfs_repair */ |
489 | if (sbp->sb_rextsize * sbp->sb_blocksize > XFS_MAX_RTEXTSIZE || | |
490 | sbp->sb_rextsize * sbp->sb_blocksize < XFS_MIN_RTEXTSIZE) { | |
491 | xfs_notice(mp, | |
492 | "realtime extent sanity check failed"); | |
493 | return -EFSCORRUPTED; | |
494 | } | |
495 | ||
496 | if (sbp->sb_rblocks == 0) { | |
497 | if (sbp->sb_rextents != 0 || sbp->sb_rbmblocks != 0 || | |
498 | sbp->sb_rextslog != 0 || sbp->sb_frextents != 0) { | |
499 | xfs_notice(mp, | |
500 | "realtime zeroed geometry check failed"); | |
501 | return -EFSCORRUPTED; | |
502 | } | |
503 | } else { | |
504 | uint64_t rexts; | |
505 | uint64_t rbmblocks; | |
506 | ||
507 | rexts = div_u64(sbp->sb_rblocks, sbp->sb_rextsize); | |
508 | rbmblocks = howmany_64(sbp->sb_rextents, | |
509 | NBBY * sbp->sb_blocksize); | |
510 | ||
511 | if (sbp->sb_rextents != rexts || | |
512 | sbp->sb_rextslog != xfs_highbit32(sbp->sb_rextents) || | |
513 | sbp->sb_rbmblocks != rbmblocks) { | |
514 | xfs_notice(mp, | |
515 | "realtime geometry sanity check failed"); | |
516 | return -EFSCORRUPTED; | |
517 | } | |
518 | } | |
519 | ||
7bc1fea9 GX |
520 | /* |
521 | * Either (sb_unit and !hasdalign) or (!sb_unit and hasdalign) | |
522 | * would imply the image is corrupted. | |
523 | */ | |
fe08cc50 DC |
524 | has_dalign = sbp->sb_versionnum & XFS_SB_VERSION_DALIGNBIT; |
525 | if (!!sbp->sb_unit ^ has_dalign) { | |
fa4ca9c5 DC |
526 | xfs_notice(mp, "SB stripe alignment sanity check failed"); |
527 | return -EFSCORRUPTED; | |
fa4ca9c5 DC |
528 | } |
529 | ||
7bc1fea9 GX |
530 | if (!xfs_validate_stripe_geometry(mp, XFS_FSB_TO_B(mp, sbp->sb_unit), |
531 | XFS_FSB_TO_B(mp, sbp->sb_width), 0, false)) | |
532 | return -EFSCORRUPTED; | |
fa4ca9c5 | 533 | |
ff55068c DC |
534 | /* |
535 | * Currently only very few inode sizes are supported. | |
536 | */ | |
537 | switch (sbp->sb_inodesize) { | |
538 | case 256: | |
539 | case 512: | |
540 | case 1024: | |
541 | case 2048: | |
542 | break; | |
543 | default: | |
544 | xfs_warn(mp, "inode size of %d bytes not supported", | |
545 | sbp->sb_inodesize); | |
2451337d | 546 | return -ENOSYS; |
ff55068c DC |
547 | } |
548 | ||
ff55068c DC |
549 | return 0; |
550 | } | |
551 | ||
552 | void | |
553 | xfs_sb_quota_from_disk(struct xfs_sb *sbp) | |
554 | { | |
555 | /* | |
556 | * older mkfs doesn't initialize quota inodes to NULLFSINO. This | |
557 | * leads to in-core values having two different values for a quota | |
558 | * inode to be invalid: 0 and NULLFSINO. Change it to a single value | |
559 | * NULLFSINO. | |
560 | * | |
561 | * Note that this change affect only the in-core values. These | |
562 | * values are not written back to disk unless any quota information | |
563 | * is written to the disk. Even in that case, sb_pquotino field is | |
564 | * not written to disk unless the superblock supports pquotino. | |
565 | */ | |
566 | if (sbp->sb_uquotino == 0) | |
567 | sbp->sb_uquotino = NULLFSINO; | |
568 | if (sbp->sb_gquotino == 0) | |
569 | sbp->sb_gquotino = NULLFSINO; | |
570 | if (sbp->sb_pquotino == 0) | |
571 | sbp->sb_pquotino = NULLFSINO; | |
572 | ||
573 | /* | |
574 | * We need to do these manipilations only if we are working | |
575 | * with an older version of on-disk superblock. | |
576 | */ | |
d6837c1a | 577 | if (xfs_sb_is_v5(sbp)) |
ff55068c DC |
578 | return; |
579 | ||
580 | if (sbp->sb_qflags & XFS_OQUOTA_ENFD) | |
581 | sbp->sb_qflags |= (sbp->sb_qflags & XFS_PQUOTA_ACCT) ? | |
582 | XFS_PQUOTA_ENFD : XFS_GQUOTA_ENFD; | |
583 | if (sbp->sb_qflags & XFS_OQUOTA_CHKD) | |
584 | sbp->sb_qflags |= (sbp->sb_qflags & XFS_PQUOTA_ACCT) ? | |
585 | XFS_PQUOTA_CHKD : XFS_GQUOTA_CHKD; | |
586 | sbp->sb_qflags &= ~(XFS_OQUOTA_ENFD | XFS_OQUOTA_CHKD); | |
587 | ||
e6fc6fcf ES |
588 | if (sbp->sb_qflags & XFS_PQUOTA_ACCT && |
589 | sbp->sb_gquotino != NULLFSINO) { | |
ff55068c DC |
590 | /* |
591 | * In older version of superblock, on-disk superblock only | |
592 | * has sb_gquotino, and in-core superblock has both sb_gquotino | |
593 | * and sb_pquotino. But, only one of them is supported at any | |
594 | * point of time. So, if PQUOTA is set in disk superblock, | |
e6fc6fcf ES |
595 | * copy over sb_gquotino to sb_pquotino. The NULLFSINO test |
596 | * above is to make sure we don't do this twice and wipe them | |
597 | * both out! | |
ff55068c DC |
598 | */ |
599 | sbp->sb_pquotino = sbp->sb_gquotino; | |
600 | sbp->sb_gquotino = NULLFSINO; | |
601 | } | |
602 | } | |
603 | ||
5ef828c4 ES |
604 | static void |
605 | __xfs_sb_from_disk( | |
ff55068c | 606 | struct xfs_sb *to, |
ed67ebfd | 607 | struct xfs_dsb *from, |
5ef828c4 | 608 | bool convert_xquota) |
ff55068c DC |
609 | { |
610 | to->sb_magicnum = be32_to_cpu(from->sb_magicnum); | |
611 | to->sb_blocksize = be32_to_cpu(from->sb_blocksize); | |
612 | to->sb_dblocks = be64_to_cpu(from->sb_dblocks); | |
613 | to->sb_rblocks = be64_to_cpu(from->sb_rblocks); | |
614 | to->sb_rextents = be64_to_cpu(from->sb_rextents); | |
615 | memcpy(&to->sb_uuid, &from->sb_uuid, sizeof(to->sb_uuid)); | |
616 | to->sb_logstart = be64_to_cpu(from->sb_logstart); | |
617 | to->sb_rootino = be64_to_cpu(from->sb_rootino); | |
618 | to->sb_rbmino = be64_to_cpu(from->sb_rbmino); | |
619 | to->sb_rsumino = be64_to_cpu(from->sb_rsumino); | |
620 | to->sb_rextsize = be32_to_cpu(from->sb_rextsize); | |
621 | to->sb_agblocks = be32_to_cpu(from->sb_agblocks); | |
622 | to->sb_agcount = be32_to_cpu(from->sb_agcount); | |
623 | to->sb_rbmblocks = be32_to_cpu(from->sb_rbmblocks); | |
624 | to->sb_logblocks = be32_to_cpu(from->sb_logblocks); | |
625 | to->sb_versionnum = be16_to_cpu(from->sb_versionnum); | |
626 | to->sb_sectsize = be16_to_cpu(from->sb_sectsize); | |
627 | to->sb_inodesize = be16_to_cpu(from->sb_inodesize); | |
628 | to->sb_inopblock = be16_to_cpu(from->sb_inopblock); | |
629 | memcpy(&to->sb_fname, &from->sb_fname, sizeof(to->sb_fname)); | |
630 | to->sb_blocklog = from->sb_blocklog; | |
631 | to->sb_sectlog = from->sb_sectlog; | |
632 | to->sb_inodelog = from->sb_inodelog; | |
633 | to->sb_inopblog = from->sb_inopblog; | |
634 | to->sb_agblklog = from->sb_agblklog; | |
635 | to->sb_rextslog = from->sb_rextslog; | |
636 | to->sb_inprogress = from->sb_inprogress; | |
637 | to->sb_imax_pct = from->sb_imax_pct; | |
638 | to->sb_icount = be64_to_cpu(from->sb_icount); | |
639 | to->sb_ifree = be64_to_cpu(from->sb_ifree); | |
640 | to->sb_fdblocks = be64_to_cpu(from->sb_fdblocks); | |
641 | to->sb_frextents = be64_to_cpu(from->sb_frextents); | |
642 | to->sb_uquotino = be64_to_cpu(from->sb_uquotino); | |
643 | to->sb_gquotino = be64_to_cpu(from->sb_gquotino); | |
644 | to->sb_qflags = be16_to_cpu(from->sb_qflags); | |
645 | to->sb_flags = from->sb_flags; | |
646 | to->sb_shared_vn = from->sb_shared_vn; | |
647 | to->sb_inoalignmt = be32_to_cpu(from->sb_inoalignmt); | |
648 | to->sb_unit = be32_to_cpu(from->sb_unit); | |
649 | to->sb_width = be32_to_cpu(from->sb_width); | |
650 | to->sb_dirblklog = from->sb_dirblklog; | |
651 | to->sb_logsectlog = from->sb_logsectlog; | |
652 | to->sb_logsectsize = be16_to_cpu(from->sb_logsectsize); | |
653 | to->sb_logsunit = be32_to_cpu(from->sb_logsunit); | |
654 | to->sb_features2 = be32_to_cpu(from->sb_features2); | |
655 | to->sb_bad_features2 = be32_to_cpu(from->sb_bad_features2); | |
656 | to->sb_features_compat = be32_to_cpu(from->sb_features_compat); | |
657 | to->sb_features_ro_compat = be32_to_cpu(from->sb_features_ro_compat); | |
658 | to->sb_features_incompat = be32_to_cpu(from->sb_features_incompat); | |
659 | to->sb_features_log_incompat = | |
660 | be32_to_cpu(from->sb_features_log_incompat); | |
04dd1a0d ES |
661 | /* crc is only used on disk, not in memory; just init to 0 here. */ |
662 | to->sb_crc = 0; | |
fb4f2b4e | 663 | to->sb_spino_align = be32_to_cpu(from->sb_spino_align); |
ff55068c DC |
664 | to->sb_pquotino = be64_to_cpu(from->sb_pquotino); |
665 | to->sb_lsn = be64_to_cpu(from->sb_lsn); | |
ce748eaa ES |
666 | /* |
667 | * sb_meta_uuid is only on disk if it differs from sb_uuid and the | |
668 | * feature flag is set; if not set we keep it only in memory. | |
669 | */ | |
d6837c1a | 670 | if (xfs_sb_is_v5(to) && |
fe08cc50 | 671 | (to->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_META_UUID)) |
ce748eaa ES |
672 | uuid_copy(&to->sb_meta_uuid, &from->sb_meta_uuid); |
673 | else | |
674 | uuid_copy(&to->sb_meta_uuid, &from->sb_uuid); | |
5ef828c4 ES |
675 | /* Convert on-disk flags to in-memory flags? */ |
676 | if (convert_xquota) | |
677 | xfs_sb_quota_from_disk(to); | |
678 | } | |
679 | ||
680 | void | |
681 | xfs_sb_from_disk( | |
682 | struct xfs_sb *to, | |
ed67ebfd | 683 | struct xfs_dsb *from) |
5ef828c4 ES |
684 | { |
685 | __xfs_sb_from_disk(to, from, true); | |
ff55068c DC |
686 | } |
687 | ||
4d11a402 | 688 | static void |
ff55068c | 689 | xfs_sb_quota_to_disk( |
4d11a402 DC |
690 | struct xfs_dsb *to, |
691 | struct xfs_sb *from) | |
ff55068c | 692 | { |
c8ce540d | 693 | uint16_t qflags = from->sb_qflags; |
ff55068c | 694 | |
4d11a402 | 695 | to->sb_uquotino = cpu_to_be64(from->sb_uquotino); |
fe08cc50 DC |
696 | |
697 | /* | |
698 | * The in-memory superblock quota state matches the v5 on-disk format so | |
699 | * just write them out and return | |
700 | */ | |
d6837c1a | 701 | if (xfs_sb_is_v5(from)) { |
4d11a402 DC |
702 | to->sb_qflags = cpu_to_be16(from->sb_qflags); |
703 | to->sb_gquotino = cpu_to_be64(from->sb_gquotino); | |
704 | to->sb_pquotino = cpu_to_be64(from->sb_pquotino); | |
705 | return; | |
706 | } | |
707 | ||
ff55068c | 708 | /* |
fe08cc50 DC |
709 | * For older superblocks (v4), the in-core version of sb_qflags do not |
710 | * have XFS_OQUOTA_* flags, whereas the on-disk version does. So, | |
711 | * convert incore XFS_{PG}QUOTA_* flags to on-disk XFS_OQUOTA_* flags. | |
ff55068c | 712 | */ |
4d11a402 DC |
713 | qflags &= ~(XFS_PQUOTA_ENFD | XFS_PQUOTA_CHKD | |
714 | XFS_GQUOTA_ENFD | XFS_GQUOTA_CHKD); | |
ff55068c | 715 | |
4d11a402 DC |
716 | if (from->sb_qflags & |
717 | (XFS_PQUOTA_ENFD | XFS_GQUOTA_ENFD)) | |
718 | qflags |= XFS_OQUOTA_ENFD; | |
719 | if (from->sb_qflags & | |
720 | (XFS_PQUOTA_CHKD | XFS_GQUOTA_CHKD)) | |
721 | qflags |= XFS_OQUOTA_CHKD; | |
722 | to->sb_qflags = cpu_to_be16(qflags); | |
ff55068c DC |
723 | |
724 | /* | |
4d11a402 DC |
725 | * GQUOTINO and PQUOTINO cannot be used together in versions |
726 | * of superblock that do not have pquotino. from->sb_flags | |
727 | * tells us which quota is active and should be copied to | |
728 | * disk. If neither are active, we should NULL the inode. | |
03e01349 | 729 | * |
4d11a402 | 730 | * In all cases, the separate pquotino must remain 0 because it |
b63da6c8 | 731 | * is beyond the "end" of the valid non-pquotino superblock. |
ff55068c | 732 | */ |
4d11a402 | 733 | if (from->sb_qflags & XFS_GQUOTA_ACCT) |
ff55068c | 734 | to->sb_gquotino = cpu_to_be64(from->sb_gquotino); |
4d11a402 | 735 | else if (from->sb_qflags & XFS_PQUOTA_ACCT) |
ff55068c | 736 | to->sb_gquotino = cpu_to_be64(from->sb_pquotino); |
03e01349 DC |
737 | else { |
738 | /* | |
739 | * We can't rely on just the fields being logged to tell us | |
740 | * that it is safe to write NULLFSINO - we should only do that | |
741 | * if quotas are not actually enabled. Hence only write | |
742 | * NULLFSINO if both in-core quota inodes are NULL. | |
743 | */ | |
744 | if (from->sb_gquotino == NULLFSINO && | |
745 | from->sb_pquotino == NULLFSINO) | |
746 | to->sb_gquotino = cpu_to_be64(NULLFSINO); | |
747 | } | |
ff55068c | 748 | |
4d11a402 | 749 | to->sb_pquotino = 0; |
ff55068c DC |
750 | } |
751 | ||
ff55068c DC |
752 | void |
753 | xfs_sb_to_disk( | |
4d11a402 DC |
754 | struct xfs_dsb *to, |
755 | struct xfs_sb *from) | |
ff55068c | 756 | { |
4d11a402 DC |
757 | xfs_sb_quota_to_disk(to, from); |
758 | ||
759 | to->sb_magicnum = cpu_to_be32(from->sb_magicnum); | |
760 | to->sb_blocksize = cpu_to_be32(from->sb_blocksize); | |
761 | to->sb_dblocks = cpu_to_be64(from->sb_dblocks); | |
762 | to->sb_rblocks = cpu_to_be64(from->sb_rblocks); | |
763 | to->sb_rextents = cpu_to_be64(from->sb_rextents); | |
764 | memcpy(&to->sb_uuid, &from->sb_uuid, sizeof(to->sb_uuid)); | |
765 | to->sb_logstart = cpu_to_be64(from->sb_logstart); | |
766 | to->sb_rootino = cpu_to_be64(from->sb_rootino); | |
767 | to->sb_rbmino = cpu_to_be64(from->sb_rbmino); | |
768 | to->sb_rsumino = cpu_to_be64(from->sb_rsumino); | |
769 | to->sb_rextsize = cpu_to_be32(from->sb_rextsize); | |
770 | to->sb_agblocks = cpu_to_be32(from->sb_agblocks); | |
771 | to->sb_agcount = cpu_to_be32(from->sb_agcount); | |
772 | to->sb_rbmblocks = cpu_to_be32(from->sb_rbmblocks); | |
773 | to->sb_logblocks = cpu_to_be32(from->sb_logblocks); | |
774 | to->sb_versionnum = cpu_to_be16(from->sb_versionnum); | |
775 | to->sb_sectsize = cpu_to_be16(from->sb_sectsize); | |
776 | to->sb_inodesize = cpu_to_be16(from->sb_inodesize); | |
777 | to->sb_inopblock = cpu_to_be16(from->sb_inopblock); | |
778 | memcpy(&to->sb_fname, &from->sb_fname, sizeof(to->sb_fname)); | |
779 | to->sb_blocklog = from->sb_blocklog; | |
780 | to->sb_sectlog = from->sb_sectlog; | |
781 | to->sb_inodelog = from->sb_inodelog; | |
782 | to->sb_inopblog = from->sb_inopblog; | |
783 | to->sb_agblklog = from->sb_agblklog; | |
784 | to->sb_rextslog = from->sb_rextslog; | |
785 | to->sb_inprogress = from->sb_inprogress; | |
786 | to->sb_imax_pct = from->sb_imax_pct; | |
787 | to->sb_icount = cpu_to_be64(from->sb_icount); | |
788 | to->sb_ifree = cpu_to_be64(from->sb_ifree); | |
789 | to->sb_fdblocks = cpu_to_be64(from->sb_fdblocks); | |
790 | to->sb_frextents = cpu_to_be64(from->sb_frextents); | |
ff55068c | 791 | |
4d11a402 DC |
792 | to->sb_flags = from->sb_flags; |
793 | to->sb_shared_vn = from->sb_shared_vn; | |
794 | to->sb_inoalignmt = cpu_to_be32(from->sb_inoalignmt); | |
795 | to->sb_unit = cpu_to_be32(from->sb_unit); | |
796 | to->sb_width = cpu_to_be32(from->sb_width); | |
797 | to->sb_dirblklog = from->sb_dirblklog; | |
798 | to->sb_logsectlog = from->sb_logsectlog; | |
799 | to->sb_logsectsize = cpu_to_be16(from->sb_logsectsize); | |
800 | to->sb_logsunit = cpu_to_be32(from->sb_logsunit); | |
074e427b DC |
801 | |
802 | /* | |
803 | * We need to ensure that bad_features2 always matches features2. | |
804 | * Hence we enforce that here rather than having to remember to do it | |
805 | * everywhere else that updates features2. | |
806 | */ | |
807 | from->sb_bad_features2 = from->sb_features2; | |
4d11a402 DC |
808 | to->sb_features2 = cpu_to_be32(from->sb_features2); |
809 | to->sb_bad_features2 = cpu_to_be32(from->sb_bad_features2); | |
810 | ||
d6837c1a DC |
811 | if (!xfs_sb_is_v5(from)) |
812 | return; | |
813 | ||
814 | to->sb_features_compat = cpu_to_be32(from->sb_features_compat); | |
815 | to->sb_features_ro_compat = | |
816 | cpu_to_be32(from->sb_features_ro_compat); | |
817 | to->sb_features_incompat = | |
818 | cpu_to_be32(from->sb_features_incompat); | |
819 | to->sb_features_log_incompat = | |
820 | cpu_to_be32(from->sb_features_log_incompat); | |
821 | to->sb_spino_align = cpu_to_be32(from->sb_spino_align); | |
822 | to->sb_lsn = cpu_to_be64(from->sb_lsn); | |
823 | if (from->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_META_UUID) | |
824 | uuid_copy(&to->sb_meta_uuid, &from->sb_meta_uuid); | |
ff55068c DC |
825 | } |
826 | ||
ff55068c DC |
827 | /* |
828 | * If the superblock has the CRC feature bit set or the CRC field is non-null, | |
829 | * check that the CRC is valid. We check the CRC field is non-null because a | |
830 | * single bit error could clear the feature bit and unused parts of the | |
831 | * superblock are supposed to be zero. Hence a non-null crc field indicates that | |
832 | * we've potentially lost a feature bit and we should check it anyway. | |
10e6e65d ES |
833 | * |
834 | * However, past bugs (i.e. in growfs) left non-zeroed regions beyond the | |
835 | * last field in V4 secondary superblocks. So for secondary superblocks, | |
836 | * we are more forgiving, and ignore CRC failures if the primary doesn't | |
837 | * indicate that the fs version is V5. | |
ff55068c DC |
838 | */ |
839 | static void | |
840 | xfs_sb_read_verify( | |
eca383fc | 841 | struct xfs_buf *bp) |
ff55068c | 842 | { |
eca383fc | 843 | struct xfs_sb sb; |
dbd329f1 | 844 | struct xfs_mount *mp = bp->b_mount; |
3e6e8afd | 845 | struct xfs_dsb *dsb = bp->b_addr; |
eca383fc | 846 | int error; |
ff55068c DC |
847 | |
848 | /* | |
849 | * open code the version check to avoid needing to convert the entire | |
850 | * superblock from disk order just to check the version number | |
851 | */ | |
852 | if (dsb->sb_magicnum == cpu_to_be32(XFS_SB_MAGIC) && | |
853 | (((be16_to_cpu(dsb->sb_versionnum) & XFS_SB_VERSION_NUMBITS) == | |
854 | XFS_SB_VERSION_5) || | |
855 | dsb->sb_crc != 0)) { | |
856 | ||
51582170 | 857 | if (!xfs_buf_verify_cksum(bp, XFS_SB_CRC_OFF)) { |
10e6e65d | 858 | /* Only fail bad secondaries on a known V5 filesystem */ |
9343ee76 | 859 | if (xfs_buf_daddr(bp) == XFS_SB_DADDR || |
fe08cc50 | 860 | xfs_has_crc(mp)) { |
2451337d | 861 | error = -EFSBADCRC; |
10e6e65d ES |
862 | goto out_error; |
863 | } | |
ff55068c DC |
864 | } |
865 | } | |
eca383fc DW |
866 | |
867 | /* | |
868 | * Check all the superblock fields. Don't byteswap the xquota flags | |
869 | * because _verify_common checks the on-disk values. | |
870 | */ | |
3e6e8afd | 871 | __xfs_sb_from_disk(&sb, dsb, false); |
eca383fc DW |
872 | error = xfs_validate_sb_common(mp, bp, &sb); |
873 | if (error) | |
874 | goto out_error; | |
875 | error = xfs_validate_sb_read(mp, &sb); | |
ff55068c DC |
876 | |
877 | out_error: | |
31ca03c9 | 878 | if (error == -EFSCORRUPTED || error == -EFSBADCRC) |
bc1a09b8 | 879 | xfs_verifier_error(bp, error, __this_address); |
31ca03c9 | 880 | else if (error) |
ff55068c | 881 | xfs_buf_ioerror(bp, error); |
ff55068c DC |
882 | } |
883 | ||
884 | /* | |
885 | * We may be probed for a filesystem match, so we may not want to emit | |
886 | * messages when the superblock buffer is not actually an XFS superblock. | |
2533787a | 887 | * If we find an XFS superblock, then run a normal, noisy mount because we are |
ff55068c DC |
888 | * really going to mount it and want to know about errors. |
889 | */ | |
890 | static void | |
891 | xfs_sb_quiet_read_verify( | |
892 | struct xfs_buf *bp) | |
893 | { | |
3e6e8afd | 894 | struct xfs_dsb *dsb = bp->b_addr; |
ff55068c | 895 | |
ff55068c DC |
896 | if (dsb->sb_magicnum == cpu_to_be32(XFS_SB_MAGIC)) { |
897 | /* XFS filesystem, verify noisily! */ | |
898 | xfs_sb_read_verify(bp); | |
899 | return; | |
900 | } | |
901 | /* quietly fail */ | |
2451337d | 902 | xfs_buf_ioerror(bp, -EWRONGFS); |
ff55068c DC |
903 | } |
904 | ||
905 | static void | |
906 | xfs_sb_write_verify( | |
907 | struct xfs_buf *bp) | |
908 | { | |
eca383fc | 909 | struct xfs_sb sb; |
dbd329f1 | 910 | struct xfs_mount *mp = bp->b_mount; |
fb1755a6 | 911 | struct xfs_buf_log_item *bip = bp->b_log_item; |
3e6e8afd | 912 | struct xfs_dsb *dsb = bp->b_addr; |
ff55068c DC |
913 | int error; |
914 | ||
eca383fc DW |
915 | /* |
916 | * Check all the superblock fields. Don't byteswap the xquota flags | |
917 | * because _verify_common checks the on-disk values. | |
918 | */ | |
3e6e8afd | 919 | __xfs_sb_from_disk(&sb, dsb, false); |
eca383fc DW |
920 | error = xfs_validate_sb_common(mp, bp, &sb); |
921 | if (error) | |
922 | goto out_error; | |
1f31c98d | 923 | error = xfs_validate_sb_write(mp, bp, &sb); |
eca383fc DW |
924 | if (error) |
925 | goto out_error; | |
ff55068c | 926 | |
d6837c1a | 927 | if (!xfs_sb_is_v5(&sb)) |
ff55068c DC |
928 | return; |
929 | ||
930 | if (bip) | |
3e6e8afd | 931 | dsb->sb_lsn = cpu_to_be64(bip->bli_item.li_lsn); |
ff55068c | 932 | |
f1dbcd7e | 933 | xfs_buf_update_cksum(bp, XFS_SB_CRC_OFF); |
eca383fc DW |
934 | return; |
935 | ||
936 | out_error: | |
937 | xfs_verifier_error(bp, error, __this_address); | |
ff55068c DC |
938 | } |
939 | ||
940 | const struct xfs_buf_ops xfs_sb_buf_ops = { | |
233135b7 | 941 | .name = "xfs_sb", |
39708c20 | 942 | .magic = { cpu_to_be32(XFS_SB_MAGIC), cpu_to_be32(XFS_SB_MAGIC) }, |
ff55068c DC |
943 | .verify_read = xfs_sb_read_verify, |
944 | .verify_write = xfs_sb_write_verify, | |
945 | }; | |
946 | ||
947 | const struct xfs_buf_ops xfs_sb_quiet_buf_ops = { | |
233135b7 | 948 | .name = "xfs_sb_quiet", |
39708c20 | 949 | .magic = { cpu_to_be32(XFS_SB_MAGIC), cpu_to_be32(XFS_SB_MAGIC) }, |
ff55068c DC |
950 | .verify_read = xfs_sb_quiet_read_verify, |
951 | .verify_write = xfs_sb_write_verify, | |
952 | }; | |
953 | ||
954 | /* | |
955 | * xfs_mount_common | |
956 | * | |
957 | * Mount initialization code establishing various mount | |
958 | * fields from the superblock associated with the given | |
494dba7b DW |
959 | * mount structure. |
960 | * | |
961 | * Inode geometry are calculated in xfs_ialloc_setup_geometry. | |
ff55068c DC |
962 | */ |
963 | void | |
964 | xfs_sb_mount_common( | |
ef325959 DW |
965 | struct xfs_mount *mp, |
966 | struct xfs_sb *sbp) | |
ff55068c | 967 | { |
20a5eab4 DC |
968 | mp->m_agfrotor = 0; |
969 | atomic_set(&mp->m_agirotor, 0); | |
ff55068c DC |
970 | mp->m_maxagi = mp->m_sb.sb_agcount; |
971 | mp->m_blkbit_log = sbp->sb_blocklog + XFS_NBBYLOG; | |
972 | mp->m_blkbb_log = sbp->sb_blocklog - BBSHIFT; | |
973 | mp->m_sectbb_log = sbp->sb_sectlog - BBSHIFT; | |
974 | mp->m_agno_log = xfs_highbit32(sbp->sb_agcount - 1) + 1; | |
ff55068c DC |
975 | mp->m_blockmask = sbp->sb_blocksize - 1; |
976 | mp->m_blockwsize = sbp->sb_blocksize >> XFS_WORDLOG; | |
977 | mp->m_blockwmask = mp->m_blockwsize - 1; | |
978 | ||
979 | mp->m_alloc_mxr[0] = xfs_allocbt_maxrecs(mp, sbp->sb_blocksize, 1); | |
980 | mp->m_alloc_mxr[1] = xfs_allocbt_maxrecs(mp, sbp->sb_blocksize, 0); | |
981 | mp->m_alloc_mnr[0] = mp->m_alloc_mxr[0] / 2; | |
982 | mp->m_alloc_mnr[1] = mp->m_alloc_mxr[1] / 2; | |
983 | ||
ff55068c DC |
984 | mp->m_bmap_dmxr[0] = xfs_bmbt_maxrecs(mp, sbp->sb_blocksize, 1); |
985 | mp->m_bmap_dmxr[1] = xfs_bmbt_maxrecs(mp, sbp->sb_blocksize, 0); | |
986 | mp->m_bmap_dmnr[0] = mp->m_bmap_dmxr[0] / 2; | |
987 | mp->m_bmap_dmnr[1] = mp->m_bmap_dmxr[1] / 2; | |
988 | ||
a1f69417 ES |
989 | mp->m_rmap_mxr[0] = xfs_rmapbt_maxrecs(sbp->sb_blocksize, 1); |
990 | mp->m_rmap_mxr[1] = xfs_rmapbt_maxrecs(sbp->sb_blocksize, 0); | |
035e00ac DW |
991 | mp->m_rmap_mnr[0] = mp->m_rmap_mxr[0] / 2; |
992 | mp->m_rmap_mnr[1] = mp->m_rmap_mxr[1] / 2; | |
993 | ||
a1f69417 ES |
994 | mp->m_refc_mxr[0] = xfs_refcountbt_maxrecs(sbp->sb_blocksize, true); |
995 | mp->m_refc_mxr[1] = xfs_refcountbt_maxrecs(sbp->sb_blocksize, false); | |
1946b91c DW |
996 | mp->m_refc_mnr[0] = mp->m_refc_mxr[0] / 2; |
997 | mp->m_refc_mnr[1] = mp->m_refc_mxr[1] / 2; | |
998 | ||
ff55068c | 999 | mp->m_bsize = XFS_FSB_TO_BB(mp, 1); |
52548852 DW |
1000 | mp->m_alloc_set_aside = xfs_alloc_set_aside(mp); |
1001 | mp->m_ag_max_usable = xfs_alloc_ag_max_usable(mp); | |
ff55068c DC |
1002 | } |
1003 | ||
ff55068c | 1004 | /* |
61e63ecb DC |
1005 | * xfs_log_sb() can be used to copy arbitrary changes to the in-core superblock |
1006 | * into the superblock buffer to be logged. It does not provide the higher | |
1007 | * level of locking that is needed to protect the in-core superblock from | |
1008 | * concurrent access. | |
ff55068c DC |
1009 | */ |
1010 | void | |
61e63ecb | 1011 | xfs_log_sb( |
4d11a402 | 1012 | struct xfs_trans *tp) |
ff55068c | 1013 | { |
4d11a402 | 1014 | struct xfs_mount *mp = tp->t_mountp; |
cead0b10 | 1015 | struct xfs_buf *bp = xfs_trans_getsb(tp); |
ff55068c | 1016 | |
6543990a DC |
1017 | /* |
1018 | * Lazy sb counters don't update the in-core superblock so do that now. | |
1019 | * If this is at unmount, the counters will be exactly correct, but at | |
1020 | * any other time they will only be ballpark correct because of | |
1021 | * reservations that have been taken out percpu counters. If we have an | |
1022 | * unclean shutdown, this will be corrected by log recovery rebuilding | |
1023 | * the counters from the AGF block counts. | |
2229276c DW |
1024 | * |
1025 | * Do not update sb_frextents here because it is not part of the lazy | |
1026 | * sb counters, despite having a percpu counter. It is always kept | |
1027 | * consistent with the ondisk rtbitmap by xfs_trans_apply_sb_deltas() | |
1028 | * and hence we don't need have to update it here. | |
6543990a | 1029 | */ |
ebd9027d | 1030 | if (xfs_has_lazysbcount(mp)) { |
6543990a | 1031 | mp->m_sb.sb_icount = percpu_counter_sum(&mp->m_icount); |
59f6ab40 LL |
1032 | mp->m_sb.sb_ifree = min_t(uint64_t, |
1033 | percpu_counter_sum(&mp->m_ifree), | |
1034 | mp->m_sb.sb_icount); | |
6543990a DC |
1035 | mp->m_sb.sb_fdblocks = percpu_counter_sum(&mp->m_fdblocks); |
1036 | } | |
501ab323 | 1037 | |
3e6e8afd | 1038 | xfs_sb_to_disk(bp->b_addr, &mp->m_sb); |
ff55068c | 1039 | xfs_trans_buf_set_type(tp, bp, XFS_BLFT_SB_BUF); |
6f4ff81a | 1040 | xfs_trans_log_buf(tp, bp, 0, sizeof(struct xfs_dsb) - 1); |
ff55068c | 1041 | } |
61e63ecb DC |
1042 | |
1043 | /* | |
1044 | * xfs_sync_sb | |
1045 | * | |
1046 | * Sync the superblock to disk. | |
1047 | * | |
1048 | * Note that the caller is responsible for checking the frozen state of the | |
1049 | * filesystem. This procedure uses the non-blocking transaction allocator and | |
1050 | * thus will allow modifications to a frozen fs. This is required because this | |
1051 | * code can be called during the process of freezing where use of the high-level | |
1052 | * allocator would deadlock. | |
1053 | */ | |
1054 | int | |
1055 | xfs_sync_sb( | |
1056 | struct xfs_mount *mp, | |
1057 | bool wait) | |
1058 | { | |
1059 | struct xfs_trans *tp; | |
1060 | int error; | |
1061 | ||
253f4911 CH |
1062 | error = xfs_trans_alloc(mp, &M_RES(mp)->tr_sb, 0, 0, |
1063 | XFS_TRANS_NO_WRITECOUNT, &tp); | |
1064 | if (error) | |
61e63ecb | 1065 | return error; |
61e63ecb DC |
1066 | |
1067 | xfs_log_sb(tp); | |
1068 | if (wait) | |
1069 | xfs_trans_set_sync(tp); | |
70393313 | 1070 | return xfs_trans_commit(tp); |
61e63ecb | 1071 | } |
c368ebcd | 1072 | |
b16817b6 DC |
1073 | /* |
1074 | * Update all the secondary superblocks to match the new state of the primary. | |
1075 | * Because we are completely overwriting all the existing fields in the | |
1076 | * secondary superblock buffers, there is no need to read them in from disk. | |
1077 | * Just get a new buffer, stamp it and write it. | |
1078 | * | |
1079 | * The sb buffers need to be cached here so that we serialise against other | |
1080 | * operations that access the secondary superblocks, but we don't want to keep | |
1081 | * them in memory once it is written so we mark it as a one-shot buffer. | |
1082 | */ | |
1083 | int | |
1084 | xfs_update_secondary_sbs( | |
1085 | struct xfs_mount *mp) | |
1086 | { | |
7f8d3b3c DC |
1087 | struct xfs_perag *pag; |
1088 | xfs_agnumber_t agno = 1; | |
b16817b6 DC |
1089 | int saved_error = 0; |
1090 | int error = 0; | |
1091 | LIST_HEAD (buffer_list); | |
1092 | ||
1093 | /* update secondary superblocks. */ | |
7f8d3b3c | 1094 | for_each_perag_from(mp, agno, pag) { |
b16817b6 DC |
1095 | struct xfs_buf *bp; |
1096 | ||
841263e9 | 1097 | error = xfs_buf_get(mp->m_ddev_targp, |
7f8d3b3c | 1098 | XFS_AG_DADDR(mp, pag->pag_agno, XFS_SB_DADDR), |
841263e9 | 1099 | XFS_FSS_TO_BB(mp, 1), &bp); |
b16817b6 DC |
1100 | /* |
1101 | * If we get an error reading or writing alternate superblocks, | |
1102 | * continue. xfs_repair chooses the "best" superblock based | |
1103 | * on most matches; if we break early, we'll leave more | |
1104 | * superblocks un-updated than updated, and xfs_repair may | |
1105 | * pick them over the properly-updated primary. | |
1106 | */ | |
841263e9 | 1107 | if (error) { |
b16817b6 DC |
1108 | xfs_warn(mp, |
1109 | "error allocating secondary superblock for ag %d", | |
7f8d3b3c | 1110 | pag->pag_agno); |
b16817b6 | 1111 | if (!saved_error) |
841263e9 | 1112 | saved_error = error; |
b16817b6 DC |
1113 | continue; |
1114 | } | |
1115 | ||
1116 | bp->b_ops = &xfs_sb_buf_ops; | |
1117 | xfs_buf_oneshot(bp); | |
1118 | xfs_buf_zero(bp, 0, BBTOB(bp->b_length)); | |
3e6e8afd | 1119 | xfs_sb_to_disk(bp->b_addr, &mp->m_sb); |
b16817b6 DC |
1120 | xfs_buf_delwri_queue(bp, &buffer_list); |
1121 | xfs_buf_relse(bp); | |
1122 | ||
1123 | /* don't hold too many buffers at once */ | |
1124 | if (agno % 16) | |
1125 | continue; | |
1126 | ||
1127 | error = xfs_buf_delwri_submit(&buffer_list); | |
1128 | if (error) { | |
1129 | xfs_warn(mp, | |
1130 | "write error %d updating a secondary superblock near ag %d", | |
7f8d3b3c | 1131 | error, pag->pag_agno); |
b16817b6 DC |
1132 | if (!saved_error) |
1133 | saved_error = error; | |
1134 | continue; | |
1135 | } | |
1136 | } | |
1137 | error = xfs_buf_delwri_submit(&buffer_list); | |
1138 | if (error) { | |
1139 | xfs_warn(mp, | |
1140 | "write error %d updating a secondary superblock near ag %d", | |
1141 | error, agno); | |
1142 | } | |
1143 | ||
1144 | return saved_error ? saved_error : error; | |
1145 | } | |
1146 | ||
f7664b31 ES |
1147 | /* |
1148 | * Same behavior as xfs_sync_sb, except that it is always synchronous and it | |
1149 | * also writes the superblock buffer to disk sector 0 immediately. | |
1150 | */ | |
1151 | int | |
1152 | xfs_sync_sb_buf( | |
1153 | struct xfs_mount *mp) | |
1154 | { | |
1155 | struct xfs_trans *tp; | |
89c2e711 | 1156 | struct xfs_buf *bp; |
f7664b31 ES |
1157 | int error; |
1158 | ||
1159 | error = xfs_trans_alloc(mp, &M_RES(mp)->tr_sb, 0, 0, 0, &tp); | |
1160 | if (error) | |
1161 | return error; | |
1162 | ||
cead0b10 | 1163 | bp = xfs_trans_getsb(tp); |
f7664b31 | 1164 | xfs_log_sb(tp); |
89c2e711 | 1165 | xfs_trans_bhold(tp, bp); |
f7664b31 ES |
1166 | xfs_trans_set_sync(tp); |
1167 | error = xfs_trans_commit(tp); | |
1168 | if (error) | |
1169 | goto out; | |
1170 | /* | |
1171 | * write out the sb buffer to get the changes to disk | |
1172 | */ | |
89c2e711 | 1173 | error = xfs_bwrite(bp); |
f7664b31 | 1174 | out: |
89c2e711 | 1175 | xfs_buf_relse(bp); |
f7664b31 ES |
1176 | return error; |
1177 | } | |
1178 | ||
91083269 | 1179 | void |
c368ebcd | 1180 | xfs_fs_geometry( |
03288b19 | 1181 | struct xfs_mount *mp, |
ac503a4c DW |
1182 | struct xfs_fsop_geom *geo, |
1183 | int struct_version) | |
c368ebcd | 1184 | { |
03288b19 DC |
1185 | struct xfs_sb *sbp = &mp->m_sb; |
1186 | ||
ac503a4c DW |
1187 | memset(geo, 0, sizeof(struct xfs_fsop_geom)); |
1188 | ||
1189 | geo->blocksize = sbp->sb_blocksize; | |
1190 | geo->rtextsize = sbp->sb_rextsize; | |
1191 | geo->agblocks = sbp->sb_agblocks; | |
1192 | geo->agcount = sbp->sb_agcount; | |
1193 | geo->logblocks = sbp->sb_logblocks; | |
1194 | geo->sectsize = sbp->sb_sectsize; | |
1195 | geo->inodesize = sbp->sb_inodesize; | |
1196 | geo->imaxpct = sbp->sb_imax_pct; | |
1197 | geo->datablocks = sbp->sb_dblocks; | |
1198 | geo->rtblocks = sbp->sb_rblocks; | |
1199 | geo->rtextents = sbp->sb_rextents; | |
1200 | geo->logstart = sbp->sb_logstart; | |
1201 | BUILD_BUG_ON(sizeof(geo->uuid) != sizeof(sbp->sb_uuid)); | |
1202 | memcpy(geo->uuid, &sbp->sb_uuid, sizeof(sbp->sb_uuid)); | |
1203 | ||
1204 | if (struct_version < 2) | |
91083269 | 1205 | return; |
ac503a4c DW |
1206 | |
1207 | geo->sunit = sbp->sb_unit; | |
1208 | geo->swidth = sbp->sb_width; | |
1209 | ||
1210 | if (struct_version < 3) | |
91083269 | 1211 | return; |
ac503a4c DW |
1212 | |
1213 | geo->version = XFS_FSOP_GEOM_VERSION; | |
1214 | geo->flags = XFS_FSOP_GEOM_FLAGS_NLINK | | |
daa79bae CH |
1215 | XFS_FSOP_GEOM_FLAGS_DIRV2 | |
1216 | XFS_FSOP_GEOM_FLAGS_EXTFLG; | |
03288b19 | 1217 | if (xfs_has_attr(mp)) |
ac503a4c | 1218 | geo->flags |= XFS_FSOP_GEOM_FLAGS_ATTR; |
03288b19 | 1219 | if (xfs_has_quota(mp)) |
ac503a4c | 1220 | geo->flags |= XFS_FSOP_GEOM_FLAGS_QUOTA; |
03288b19 | 1221 | if (xfs_has_align(mp)) |
ac503a4c | 1222 | geo->flags |= XFS_FSOP_GEOM_FLAGS_IALIGN; |
03288b19 | 1223 | if (xfs_has_dalign(mp)) |
ac503a4c | 1224 | geo->flags |= XFS_FSOP_GEOM_FLAGS_DALIGN; |
03288b19 | 1225 | if (xfs_has_asciici(mp)) |
ac503a4c | 1226 | geo->flags |= XFS_FSOP_GEOM_FLAGS_DIRV2CI; |
03288b19 | 1227 | if (xfs_has_lazysbcount(mp)) |
ac503a4c | 1228 | geo->flags |= XFS_FSOP_GEOM_FLAGS_LAZYSB; |
03288b19 | 1229 | if (xfs_has_attr2(mp)) |
ac503a4c | 1230 | geo->flags |= XFS_FSOP_GEOM_FLAGS_ATTR2; |
03288b19 | 1231 | if (xfs_has_projid32(mp)) |
ac503a4c | 1232 | geo->flags |= XFS_FSOP_GEOM_FLAGS_PROJID32; |
03288b19 | 1233 | if (xfs_has_crc(mp)) |
ac503a4c | 1234 | geo->flags |= XFS_FSOP_GEOM_FLAGS_V5SB; |
03288b19 | 1235 | if (xfs_has_ftype(mp)) |
ac503a4c | 1236 | geo->flags |= XFS_FSOP_GEOM_FLAGS_FTYPE; |
03288b19 | 1237 | if (xfs_has_finobt(mp)) |
ac503a4c | 1238 | geo->flags |= XFS_FSOP_GEOM_FLAGS_FINOBT; |
03288b19 | 1239 | if (xfs_has_sparseinodes(mp)) |
ac503a4c | 1240 | geo->flags |= XFS_FSOP_GEOM_FLAGS_SPINODES; |
03288b19 | 1241 | if (xfs_has_rmapbt(mp)) |
ac503a4c | 1242 | geo->flags |= XFS_FSOP_GEOM_FLAGS_RMAPBT; |
03288b19 | 1243 | if (xfs_has_reflink(mp)) |
ac503a4c | 1244 | geo->flags |= XFS_FSOP_GEOM_FLAGS_REFLINK; |
03288b19 | 1245 | if (xfs_has_bigtime(mp)) |
f93e5436 | 1246 | geo->flags |= XFS_FSOP_GEOM_FLAGS_BIGTIME; |
03288b19 | 1247 | if (xfs_has_inobtcounts(mp)) |
bc41fa53 | 1248 | geo->flags |= XFS_FSOP_GEOM_FLAGS_INOBTCNT; |
03288b19 DC |
1249 | if (xfs_has_sector(mp)) { |
1250 | geo->flags |= XFS_FSOP_GEOM_FLAGS_SECTOR; | |
ac503a4c | 1251 | geo->logsectsize = sbp->sb_logsectsize; |
03288b19 | 1252 | } else { |
ac503a4c | 1253 | geo->logsectsize = BBSIZE; |
03288b19 | 1254 | } |
7c05aa9d CB |
1255 | if (xfs_has_large_extent_counts(mp)) |
1256 | geo->flags |= XFS_FSOP_GEOM_FLAGS_NREXT64; | |
ac503a4c DW |
1257 | geo->rtsectsize = sbp->sb_blocksize; |
1258 | geo->dirblocksize = xfs_dir2_dirblock_bytes(sbp); | |
1259 | ||
a8789a5a | 1260 | if (struct_version < 4) |
91083269 | 1261 | return; |
ac503a4c | 1262 | |
03288b19 | 1263 | if (xfs_has_logv2(mp)) |
ac503a4c DW |
1264 | geo->flags |= XFS_FSOP_GEOM_FLAGS_LOGV2; |
1265 | ||
1266 | geo->logsunit = sbp->sb_logsunit; | |
c368ebcd | 1267 | |
1b6d968d | 1268 | if (struct_version < 5) |
91083269 | 1269 | return; |
1b6d968d DC |
1270 | |
1271 | geo->version = XFS_FSOP_GEOM_VERSION_V5; | |
c368ebcd | 1272 | } |
689e11c8 DW |
1273 | |
1274 | /* Read a secondary superblock. */ | |
1275 | int | |
1276 | xfs_sb_read_secondary( | |
1277 | struct xfs_mount *mp, | |
1278 | struct xfs_trans *tp, | |
1279 | xfs_agnumber_t agno, | |
1280 | struct xfs_buf **bpp) | |
1281 | { | |
1282 | struct xfs_buf *bp; | |
1283 | int error; | |
1284 | ||
1285 | ASSERT(agno != 0 && agno != NULLAGNUMBER); | |
1286 | error = xfs_trans_read_buf(mp, tp, mp->m_ddev_targp, | |
1287 | XFS_AG_DADDR(mp, agno, XFS_SB_BLOCK(mp)), | |
1288 | XFS_FSS_TO_BB(mp, 1), 0, &bp, &xfs_sb_buf_ops); | |
1289 | if (error) | |
1290 | return error; | |
1291 | xfs_buf_set_ref(bp, XFS_SSB_REF); | |
1292 | *bpp = bp; | |
1293 | return 0; | |
1294 | } | |
d25522f1 DW |
1295 | |
1296 | /* Get an uninitialised secondary superblock buffer. */ | |
1297 | int | |
1298 | xfs_sb_get_secondary( | |
1299 | struct xfs_mount *mp, | |
1300 | struct xfs_trans *tp, | |
1301 | xfs_agnumber_t agno, | |
1302 | struct xfs_buf **bpp) | |
1303 | { | |
1304 | struct xfs_buf *bp; | |
ce92464c | 1305 | int error; |
d25522f1 DW |
1306 | |
1307 | ASSERT(agno != 0 && agno != NULLAGNUMBER); | |
ce92464c | 1308 | error = xfs_trans_get_buf(tp, mp->m_ddev_targp, |
d25522f1 | 1309 | XFS_AG_DADDR(mp, agno, XFS_SB_BLOCK(mp)), |
ce92464c DW |
1310 | XFS_FSS_TO_BB(mp, 1), 0, &bp); |
1311 | if (error) | |
1312 | return error; | |
d25522f1 DW |
1313 | bp->b_ops = &xfs_sb_buf_ops; |
1314 | xfs_buf_oneshot(bp); | |
1315 | *bpp = bp; | |
1316 | return 0; | |
1317 | } | |
7bc1fea9 GX |
1318 | |
1319 | /* | |
1320 | * sunit, swidth, sectorsize(optional with 0) should be all in bytes, | |
1321 | * so users won't be confused by values in error messages. | |
1322 | */ | |
1323 | bool | |
1324 | xfs_validate_stripe_geometry( | |
1325 | struct xfs_mount *mp, | |
1326 | __s64 sunit, | |
1327 | __s64 swidth, | |
1328 | int sectorsize, | |
1329 | bool silent) | |
1330 | { | |
1331 | if (swidth > INT_MAX) { | |
1332 | if (!silent) | |
1333 | xfs_notice(mp, | |
1334 | "stripe width (%lld) is too large", swidth); | |
1335 | return false; | |
1336 | } | |
1337 | ||
1338 | if (sunit > swidth) { | |
1339 | if (!silent) | |
1340 | xfs_notice(mp, | |
1341 | "stripe unit (%lld) is larger than the stripe width (%lld)", sunit, swidth); | |
1342 | return false; | |
1343 | } | |
1344 | ||
1345 | if (sectorsize && (int)sunit % sectorsize) { | |
1346 | if (!silent) | |
1347 | xfs_notice(mp, | |
1348 | "stripe unit (%lld) must be a multiple of the sector size (%d)", | |
1349 | sunit, sectorsize); | |
1350 | return false; | |
1351 | } | |
1352 | ||
1353 | if (sunit && !swidth) { | |
1354 | if (!silent) | |
1355 | xfs_notice(mp, | |
1356 | "invalid stripe unit (%lld) and stripe width of 0", sunit); | |
1357 | return false; | |
1358 | } | |
1359 | ||
1360 | if (!sunit && swidth) { | |
1361 | if (!silent) | |
1362 | xfs_notice(mp, | |
1363 | "invalid stripe width (%lld) and stripe unit of 0", swidth); | |
1364 | return false; | |
1365 | } | |
1366 | ||
1367 | if (sunit && (int)swidth % (int)sunit) { | |
1368 | if (!silent) | |
1369 | xfs_notice(mp, | |
1370 | "stripe width (%lld) must be a multiple of the stripe unit (%lld)", | |
1371 | swidth, sunit); | |
1372 | return false; | |
1373 | } | |
1374 | return true; | |
1375 | } |