Commit | Line | Data |
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ff55068c DC |
1 | /* |
2 | * Copyright (c) 2000-2005 Silicon Graphics, Inc. | |
3 | * All Rights Reserved. | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or | |
6 | * modify it under the terms of the GNU General Public License as | |
7 | * published by the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope that it would be useful, | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License | |
15 | * along with this program; if not, write the Free Software Foundation, | |
16 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
17 | */ | |
18 | #include "xfs.h" | |
19 | #include "xfs_fs.h" | |
632b89e8 | 20 | #include "xfs_shared.h" |
ff55068c | 21 | #include "xfs_format.h" |
239880ef DC |
22 | #include "xfs_log_format.h" |
23 | #include "xfs_trans_resv.h" | |
ff55068c | 24 | #include "xfs_bit.h" |
ff55068c | 25 | #include "xfs_sb.h" |
ff55068c | 26 | #include "xfs_mount.h" |
3ab78df2 | 27 | #include "xfs_defer.h" |
ff55068c | 28 | #include "xfs_inode.h" |
ff55068c DC |
29 | #include "xfs_ialloc.h" |
30 | #include "xfs_alloc.h" | |
ff55068c | 31 | #include "xfs_error.h" |
ff55068c DC |
32 | #include "xfs_trace.h" |
33 | #include "xfs_cksum.h" | |
239880ef | 34 | #include "xfs_trans.h" |
ff55068c | 35 | #include "xfs_buf_item.h" |
a4fbe6ab DC |
36 | #include "xfs_bmap_btree.h" |
37 | #include "xfs_alloc_btree.h" | |
38 | #include "xfs_ialloc_btree.h" | |
a45086e2 | 39 | #include "xfs_log.h" |
035e00ac | 40 | #include "xfs_rmap_btree.h" |
ff55068c DC |
41 | |
42 | /* | |
43 | * Physical superblock buffer manipulations. Shared with libxfs in userspace. | |
44 | */ | |
45 | ||
ff55068c DC |
46 | /* |
47 | * Reference counting access wrappers to the perag structures. | |
48 | * Because we never free per-ag structures, the only thing we | |
49 | * have to protect against changes is the tree structure itself. | |
50 | */ | |
51 | struct xfs_perag * | |
52 | xfs_perag_get( | |
53 | struct xfs_mount *mp, | |
54 | xfs_agnumber_t agno) | |
55 | { | |
56 | struct xfs_perag *pag; | |
57 | int ref = 0; | |
58 | ||
59 | rcu_read_lock(); | |
60 | pag = radix_tree_lookup(&mp->m_perag_tree, agno); | |
61 | if (pag) { | |
62 | ASSERT(atomic_read(&pag->pag_ref) >= 0); | |
63 | ref = atomic_inc_return(&pag->pag_ref); | |
64 | } | |
65 | rcu_read_unlock(); | |
66 | trace_xfs_perag_get(mp, agno, ref, _RET_IP_); | |
67 | return pag; | |
68 | } | |
69 | ||
70 | /* | |
71 | * search from @first to find the next perag with the given tag set. | |
72 | */ | |
73 | struct xfs_perag * | |
74 | xfs_perag_get_tag( | |
75 | struct xfs_mount *mp, | |
76 | xfs_agnumber_t first, | |
77 | int tag) | |
78 | { | |
79 | struct xfs_perag *pag; | |
80 | int found; | |
81 | int ref; | |
82 | ||
83 | rcu_read_lock(); | |
84 | found = radix_tree_gang_lookup_tag(&mp->m_perag_tree, | |
85 | (void **)&pag, first, 1, tag); | |
86 | if (found <= 0) { | |
87 | rcu_read_unlock(); | |
88 | return NULL; | |
89 | } | |
90 | ref = atomic_inc_return(&pag->pag_ref); | |
91 | rcu_read_unlock(); | |
92 | trace_xfs_perag_get_tag(mp, pag->pag_agno, ref, _RET_IP_); | |
93 | return pag; | |
94 | } | |
95 | ||
96 | void | |
97 | xfs_perag_put( | |
98 | struct xfs_perag *pag) | |
99 | { | |
100 | int ref; | |
101 | ||
102 | ASSERT(atomic_read(&pag->pag_ref) > 0); | |
103 | ref = atomic_dec_return(&pag->pag_ref); | |
104 | trace_xfs_perag_put(pag->pag_mount, pag->pag_agno, ref, _RET_IP_); | |
105 | } | |
106 | ||
107 | /* | |
108 | * Check the validity of the SB found. | |
109 | */ | |
110 | STATIC int | |
111 | xfs_mount_validate_sb( | |
112 | xfs_mount_t *mp, | |
113 | xfs_sb_t *sbp, | |
114 | bool check_inprogress, | |
115 | bool check_version) | |
116 | { | |
ff55068c DC |
117 | if (sbp->sb_magicnum != XFS_SB_MAGIC) { |
118 | xfs_warn(mp, "bad magic number"); | |
2451337d | 119 | return -EWRONGFS; |
ff55068c DC |
120 | } |
121 | ||
122 | ||
123 | if (!xfs_sb_good_version(sbp)) { | |
124 | xfs_warn(mp, "bad version"); | |
2451337d | 125 | return -EWRONGFS; |
ff55068c DC |
126 | } |
127 | ||
128 | /* | |
129 | * Version 5 superblock feature mask validation. Reject combinations the | |
130 | * kernel cannot support up front before checking anything else. For | |
131 | * write validation, we don't need to check feature masks. | |
132 | */ | |
133 | if (check_version && XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) { | |
ff55068c DC |
134 | if (xfs_sb_has_compat_feature(sbp, |
135 | XFS_SB_FEAT_COMPAT_UNKNOWN)) { | |
136 | xfs_warn(mp, | |
f41febd2 | 137 | "Superblock has unknown compatible features (0x%x) enabled.", |
ff55068c DC |
138 | (sbp->sb_features_compat & |
139 | XFS_SB_FEAT_COMPAT_UNKNOWN)); | |
f41febd2 JP |
140 | xfs_warn(mp, |
141 | "Using a more recent kernel is recommended."); | |
ff55068c DC |
142 | } |
143 | ||
144 | if (xfs_sb_has_ro_compat_feature(sbp, | |
145 | XFS_SB_FEAT_RO_COMPAT_UNKNOWN)) { | |
146 | xfs_alert(mp, | |
147 | "Superblock has unknown read-only compatible features (0x%x) enabled.", | |
148 | (sbp->sb_features_ro_compat & | |
149 | XFS_SB_FEAT_RO_COMPAT_UNKNOWN)); | |
150 | if (!(mp->m_flags & XFS_MOUNT_RDONLY)) { | |
151 | xfs_warn(mp, | |
f41febd2 JP |
152 | "Attempted to mount read-only compatible filesystem read-write."); |
153 | xfs_warn(mp, | |
ff55068c | 154 | "Filesystem can only be safely mounted read only."); |
f41febd2 | 155 | |
2451337d | 156 | return -EINVAL; |
ff55068c DC |
157 | } |
158 | } | |
159 | if (xfs_sb_has_incompat_feature(sbp, | |
160 | XFS_SB_FEAT_INCOMPAT_UNKNOWN)) { | |
161 | xfs_warn(mp, | |
f41febd2 | 162 | "Superblock has unknown incompatible features (0x%x) enabled.", |
ff55068c DC |
163 | (sbp->sb_features_incompat & |
164 | XFS_SB_FEAT_INCOMPAT_UNKNOWN)); | |
f41febd2 JP |
165 | xfs_warn(mp, |
166 | "Filesystem can not be safely mounted by this kernel."); | |
2451337d | 167 | return -EINVAL; |
ff55068c | 168 | } |
a45086e2 BF |
169 | } else if (xfs_sb_version_hascrc(sbp)) { |
170 | /* | |
171 | * We can't read verify the sb LSN because the read verifier is | |
172 | * called before the log is allocated and processed. We know the | |
173 | * log is set up before write verifier (!check_version) calls, | |
174 | * so just check it here. | |
175 | */ | |
176 | if (!xfs_log_check_lsn(mp, sbp->sb_lsn)) | |
177 | return -EFSCORRUPTED; | |
ff55068c DC |
178 | } |
179 | ||
180 | if (xfs_sb_version_has_pquotino(sbp)) { | |
181 | if (sbp->sb_qflags & (XFS_OQUOTA_ENFD | XFS_OQUOTA_CHKD)) { | |
182 | xfs_notice(mp, | |
08e96e1a | 183 | "Version 5 of Super block has XFS_OQUOTA bits."); |
2451337d | 184 | return -EFSCORRUPTED; |
ff55068c DC |
185 | } |
186 | } else if (sbp->sb_qflags & (XFS_PQUOTA_ENFD | XFS_GQUOTA_ENFD | | |
187 | XFS_PQUOTA_CHKD | XFS_GQUOTA_CHKD)) { | |
188 | xfs_notice(mp, | |
08e96e1a | 189 | "Superblock earlier than Version 5 has XFS_[PQ]UOTA_{ENFD|CHKD} bits."); |
2451337d | 190 | return -EFSCORRUPTED; |
ff55068c DC |
191 | } |
192 | ||
e5376fc1 BF |
193 | /* |
194 | * Full inode chunks must be aligned to inode chunk size when | |
195 | * sparse inodes are enabled to support the sparse chunk | |
196 | * allocation algorithm and prevent overlapping inode records. | |
197 | */ | |
198 | if (xfs_sb_version_hassparseinodes(sbp)) { | |
199 | uint32_t align; | |
200 | ||
e5376fc1 BF |
201 | align = XFS_INODES_PER_CHUNK * sbp->sb_inodesize |
202 | >> sbp->sb_blocklog; | |
203 | if (sbp->sb_inoalignmt != align) { | |
204 | xfs_warn(mp, | |
205 | "Inode block alignment (%u) must match chunk size (%u) for sparse inodes.", | |
206 | sbp->sb_inoalignmt, align); | |
207 | return -EINVAL; | |
208 | } | |
209 | } | |
210 | ||
ff55068c DC |
211 | if (unlikely( |
212 | sbp->sb_logstart == 0 && mp->m_logdev_targp == mp->m_ddev_targp)) { | |
213 | xfs_warn(mp, | |
214 | "filesystem is marked as having an external log; " | |
215 | "specify logdev on the mount command line."); | |
2451337d | 216 | return -EINVAL; |
ff55068c DC |
217 | } |
218 | ||
219 | if (unlikely( | |
220 | sbp->sb_logstart != 0 && mp->m_logdev_targp != mp->m_ddev_targp)) { | |
221 | xfs_warn(mp, | |
222 | "filesystem is marked as having an internal log; " | |
223 | "do not specify logdev on the mount command line."); | |
2451337d | 224 | return -EINVAL; |
ff55068c DC |
225 | } |
226 | ||
227 | /* | |
228 | * More sanity checking. Most of these were stolen directly from | |
229 | * xfs_repair. | |
230 | */ | |
231 | if (unlikely( | |
232 | sbp->sb_agcount <= 0 || | |
233 | sbp->sb_sectsize < XFS_MIN_SECTORSIZE || | |
234 | sbp->sb_sectsize > XFS_MAX_SECTORSIZE || | |
235 | sbp->sb_sectlog < XFS_MIN_SECTORSIZE_LOG || | |
236 | sbp->sb_sectlog > XFS_MAX_SECTORSIZE_LOG || | |
237 | sbp->sb_sectsize != (1 << sbp->sb_sectlog) || | |
238 | sbp->sb_blocksize < XFS_MIN_BLOCKSIZE || | |
239 | sbp->sb_blocksize > XFS_MAX_BLOCKSIZE || | |
240 | sbp->sb_blocklog < XFS_MIN_BLOCKSIZE_LOG || | |
241 | sbp->sb_blocklog > XFS_MAX_BLOCKSIZE_LOG || | |
242 | sbp->sb_blocksize != (1 << sbp->sb_blocklog) || | |
e1b05723 | 243 | sbp->sb_dirblklog > XFS_MAX_BLOCKSIZE_LOG || |
ff55068c DC |
244 | sbp->sb_inodesize < XFS_DINODE_MIN_SIZE || |
245 | sbp->sb_inodesize > XFS_DINODE_MAX_SIZE || | |
246 | sbp->sb_inodelog < XFS_DINODE_MIN_LOG || | |
247 | sbp->sb_inodelog > XFS_DINODE_MAX_LOG || | |
248 | sbp->sb_inodesize != (1 << sbp->sb_inodelog) || | |
e1b05723 | 249 | sbp->sb_logsunit > XLOG_MAX_RECORD_BSIZE || |
392c6de9 | 250 | sbp->sb_inopblock != howmany(sbp->sb_blocksize,sbp->sb_inodesize) || |
ff55068c DC |
251 | (sbp->sb_blocklog - sbp->sb_inodelog != sbp->sb_inopblog) || |
252 | (sbp->sb_rextsize * sbp->sb_blocksize > XFS_MAX_RTEXTSIZE) || | |
253 | (sbp->sb_rextsize * sbp->sb_blocksize < XFS_MIN_RTEXTSIZE) || | |
254 | (sbp->sb_imax_pct > 100 /* zero sb_imax_pct is valid */) || | |
255 | sbp->sb_dblocks == 0 || | |
256 | sbp->sb_dblocks > XFS_MAX_DBLOCKS(sbp) || | |
ab3e57b5 DC |
257 | sbp->sb_dblocks < XFS_MIN_DBLOCKS(sbp) || |
258 | sbp->sb_shared_vn != 0)) { | |
5ef11eb0 | 259 | xfs_notice(mp, "SB sanity check failed"); |
2451337d | 260 | return -EFSCORRUPTED; |
ff55068c DC |
261 | } |
262 | ||
263 | /* | |
264 | * Until this is fixed only page-sized or smaller data blocks work. | |
265 | */ | |
266 | if (unlikely(sbp->sb_blocksize > PAGE_SIZE)) { | |
267 | xfs_warn(mp, | |
268 | "File system with blocksize %d bytes. " | |
269 | "Only pagesize (%ld) or less will currently work.", | |
270 | sbp->sb_blocksize, PAGE_SIZE); | |
2451337d | 271 | return -ENOSYS; |
ff55068c DC |
272 | } |
273 | ||
274 | /* | |
275 | * Currently only very few inode sizes are supported. | |
276 | */ | |
277 | switch (sbp->sb_inodesize) { | |
278 | case 256: | |
279 | case 512: | |
280 | case 1024: | |
281 | case 2048: | |
282 | break; | |
283 | default: | |
284 | xfs_warn(mp, "inode size of %d bytes not supported", | |
285 | sbp->sb_inodesize); | |
2451337d | 286 | return -ENOSYS; |
ff55068c DC |
287 | } |
288 | ||
289 | if (xfs_sb_validate_fsb_count(sbp, sbp->sb_dblocks) || | |
290 | xfs_sb_validate_fsb_count(sbp, sbp->sb_rblocks)) { | |
291 | xfs_warn(mp, | |
292 | "file system too large to be mounted on this system."); | |
2451337d | 293 | return -EFBIG; |
ff55068c DC |
294 | } |
295 | ||
296 | if (check_inprogress && sbp->sb_inprogress) { | |
297 | xfs_warn(mp, "Offline file system operation in progress!"); | |
2451337d | 298 | return -EFSCORRUPTED; |
ff55068c | 299 | } |
ff55068c DC |
300 | return 0; |
301 | } | |
302 | ||
303 | void | |
304 | xfs_sb_quota_from_disk(struct xfs_sb *sbp) | |
305 | { | |
306 | /* | |
307 | * older mkfs doesn't initialize quota inodes to NULLFSINO. This | |
308 | * leads to in-core values having two different values for a quota | |
309 | * inode to be invalid: 0 and NULLFSINO. Change it to a single value | |
310 | * NULLFSINO. | |
311 | * | |
312 | * Note that this change affect only the in-core values. These | |
313 | * values are not written back to disk unless any quota information | |
314 | * is written to the disk. Even in that case, sb_pquotino field is | |
315 | * not written to disk unless the superblock supports pquotino. | |
316 | */ | |
317 | if (sbp->sb_uquotino == 0) | |
318 | sbp->sb_uquotino = NULLFSINO; | |
319 | if (sbp->sb_gquotino == 0) | |
320 | sbp->sb_gquotino = NULLFSINO; | |
321 | if (sbp->sb_pquotino == 0) | |
322 | sbp->sb_pquotino = NULLFSINO; | |
323 | ||
324 | /* | |
325 | * We need to do these manipilations only if we are working | |
326 | * with an older version of on-disk superblock. | |
327 | */ | |
328 | if (xfs_sb_version_has_pquotino(sbp)) | |
329 | return; | |
330 | ||
331 | if (sbp->sb_qflags & XFS_OQUOTA_ENFD) | |
332 | sbp->sb_qflags |= (sbp->sb_qflags & XFS_PQUOTA_ACCT) ? | |
333 | XFS_PQUOTA_ENFD : XFS_GQUOTA_ENFD; | |
334 | if (sbp->sb_qflags & XFS_OQUOTA_CHKD) | |
335 | sbp->sb_qflags |= (sbp->sb_qflags & XFS_PQUOTA_ACCT) ? | |
336 | XFS_PQUOTA_CHKD : XFS_GQUOTA_CHKD; | |
337 | sbp->sb_qflags &= ~(XFS_OQUOTA_ENFD | XFS_OQUOTA_CHKD); | |
338 | ||
339 | if (sbp->sb_qflags & XFS_PQUOTA_ACCT) { | |
340 | /* | |
341 | * In older version of superblock, on-disk superblock only | |
342 | * has sb_gquotino, and in-core superblock has both sb_gquotino | |
343 | * and sb_pquotino. But, only one of them is supported at any | |
344 | * point of time. So, if PQUOTA is set in disk superblock, | |
345 | * copy over sb_gquotino to sb_pquotino. | |
346 | */ | |
347 | sbp->sb_pquotino = sbp->sb_gquotino; | |
348 | sbp->sb_gquotino = NULLFSINO; | |
349 | } | |
350 | } | |
351 | ||
5ef828c4 ES |
352 | static void |
353 | __xfs_sb_from_disk( | |
ff55068c | 354 | struct xfs_sb *to, |
5ef828c4 ES |
355 | xfs_dsb_t *from, |
356 | bool convert_xquota) | |
ff55068c DC |
357 | { |
358 | to->sb_magicnum = be32_to_cpu(from->sb_magicnum); | |
359 | to->sb_blocksize = be32_to_cpu(from->sb_blocksize); | |
360 | to->sb_dblocks = be64_to_cpu(from->sb_dblocks); | |
361 | to->sb_rblocks = be64_to_cpu(from->sb_rblocks); | |
362 | to->sb_rextents = be64_to_cpu(from->sb_rextents); | |
363 | memcpy(&to->sb_uuid, &from->sb_uuid, sizeof(to->sb_uuid)); | |
364 | to->sb_logstart = be64_to_cpu(from->sb_logstart); | |
365 | to->sb_rootino = be64_to_cpu(from->sb_rootino); | |
366 | to->sb_rbmino = be64_to_cpu(from->sb_rbmino); | |
367 | to->sb_rsumino = be64_to_cpu(from->sb_rsumino); | |
368 | to->sb_rextsize = be32_to_cpu(from->sb_rextsize); | |
369 | to->sb_agblocks = be32_to_cpu(from->sb_agblocks); | |
370 | to->sb_agcount = be32_to_cpu(from->sb_agcount); | |
371 | to->sb_rbmblocks = be32_to_cpu(from->sb_rbmblocks); | |
372 | to->sb_logblocks = be32_to_cpu(from->sb_logblocks); | |
373 | to->sb_versionnum = be16_to_cpu(from->sb_versionnum); | |
374 | to->sb_sectsize = be16_to_cpu(from->sb_sectsize); | |
375 | to->sb_inodesize = be16_to_cpu(from->sb_inodesize); | |
376 | to->sb_inopblock = be16_to_cpu(from->sb_inopblock); | |
377 | memcpy(&to->sb_fname, &from->sb_fname, sizeof(to->sb_fname)); | |
378 | to->sb_blocklog = from->sb_blocklog; | |
379 | to->sb_sectlog = from->sb_sectlog; | |
380 | to->sb_inodelog = from->sb_inodelog; | |
381 | to->sb_inopblog = from->sb_inopblog; | |
382 | to->sb_agblklog = from->sb_agblklog; | |
383 | to->sb_rextslog = from->sb_rextslog; | |
384 | to->sb_inprogress = from->sb_inprogress; | |
385 | to->sb_imax_pct = from->sb_imax_pct; | |
386 | to->sb_icount = be64_to_cpu(from->sb_icount); | |
387 | to->sb_ifree = be64_to_cpu(from->sb_ifree); | |
388 | to->sb_fdblocks = be64_to_cpu(from->sb_fdblocks); | |
389 | to->sb_frextents = be64_to_cpu(from->sb_frextents); | |
390 | to->sb_uquotino = be64_to_cpu(from->sb_uquotino); | |
391 | to->sb_gquotino = be64_to_cpu(from->sb_gquotino); | |
392 | to->sb_qflags = be16_to_cpu(from->sb_qflags); | |
393 | to->sb_flags = from->sb_flags; | |
394 | to->sb_shared_vn = from->sb_shared_vn; | |
395 | to->sb_inoalignmt = be32_to_cpu(from->sb_inoalignmt); | |
396 | to->sb_unit = be32_to_cpu(from->sb_unit); | |
397 | to->sb_width = be32_to_cpu(from->sb_width); | |
398 | to->sb_dirblklog = from->sb_dirblklog; | |
399 | to->sb_logsectlog = from->sb_logsectlog; | |
400 | to->sb_logsectsize = be16_to_cpu(from->sb_logsectsize); | |
401 | to->sb_logsunit = be32_to_cpu(from->sb_logsunit); | |
402 | to->sb_features2 = be32_to_cpu(from->sb_features2); | |
403 | to->sb_bad_features2 = be32_to_cpu(from->sb_bad_features2); | |
404 | to->sb_features_compat = be32_to_cpu(from->sb_features_compat); | |
405 | to->sb_features_ro_compat = be32_to_cpu(from->sb_features_ro_compat); | |
406 | to->sb_features_incompat = be32_to_cpu(from->sb_features_incompat); | |
407 | to->sb_features_log_incompat = | |
408 | be32_to_cpu(from->sb_features_log_incompat); | |
04dd1a0d ES |
409 | /* crc is only used on disk, not in memory; just init to 0 here. */ |
410 | to->sb_crc = 0; | |
fb4f2b4e | 411 | to->sb_spino_align = be32_to_cpu(from->sb_spino_align); |
ff55068c DC |
412 | to->sb_pquotino = be64_to_cpu(from->sb_pquotino); |
413 | to->sb_lsn = be64_to_cpu(from->sb_lsn); | |
ce748eaa ES |
414 | /* |
415 | * sb_meta_uuid is only on disk if it differs from sb_uuid and the | |
416 | * feature flag is set; if not set we keep it only in memory. | |
417 | */ | |
418 | if (xfs_sb_version_hasmetauuid(to)) | |
419 | uuid_copy(&to->sb_meta_uuid, &from->sb_meta_uuid); | |
420 | else | |
421 | uuid_copy(&to->sb_meta_uuid, &from->sb_uuid); | |
5ef828c4 ES |
422 | /* Convert on-disk flags to in-memory flags? */ |
423 | if (convert_xquota) | |
424 | xfs_sb_quota_from_disk(to); | |
425 | } | |
426 | ||
427 | void | |
428 | xfs_sb_from_disk( | |
429 | struct xfs_sb *to, | |
430 | xfs_dsb_t *from) | |
431 | { | |
432 | __xfs_sb_from_disk(to, from, true); | |
ff55068c DC |
433 | } |
434 | ||
4d11a402 | 435 | static void |
ff55068c | 436 | xfs_sb_quota_to_disk( |
4d11a402 DC |
437 | struct xfs_dsb *to, |
438 | struct xfs_sb *from) | |
ff55068c DC |
439 | { |
440 | __uint16_t qflags = from->sb_qflags; | |
441 | ||
4d11a402 DC |
442 | to->sb_uquotino = cpu_to_be64(from->sb_uquotino); |
443 | if (xfs_sb_version_has_pquotino(from)) { | |
444 | to->sb_qflags = cpu_to_be16(from->sb_qflags); | |
445 | to->sb_gquotino = cpu_to_be64(from->sb_gquotino); | |
446 | to->sb_pquotino = cpu_to_be64(from->sb_pquotino); | |
447 | return; | |
448 | } | |
449 | ||
ff55068c | 450 | /* |
4d11a402 DC |
451 | * The in-core version of sb_qflags do not have XFS_OQUOTA_* |
452 | * flags, whereas the on-disk version does. So, convert incore | |
453 | * XFS_{PG}QUOTA_* flags to on-disk XFS_OQUOTA_* flags. | |
ff55068c | 454 | */ |
4d11a402 DC |
455 | qflags &= ~(XFS_PQUOTA_ENFD | XFS_PQUOTA_CHKD | |
456 | XFS_GQUOTA_ENFD | XFS_GQUOTA_CHKD); | |
ff55068c | 457 | |
4d11a402 DC |
458 | if (from->sb_qflags & |
459 | (XFS_PQUOTA_ENFD | XFS_GQUOTA_ENFD)) | |
460 | qflags |= XFS_OQUOTA_ENFD; | |
461 | if (from->sb_qflags & | |
462 | (XFS_PQUOTA_CHKD | XFS_GQUOTA_CHKD)) | |
463 | qflags |= XFS_OQUOTA_CHKD; | |
464 | to->sb_qflags = cpu_to_be16(qflags); | |
ff55068c DC |
465 | |
466 | /* | |
4d11a402 DC |
467 | * GQUOTINO and PQUOTINO cannot be used together in versions |
468 | * of superblock that do not have pquotino. from->sb_flags | |
469 | * tells us which quota is active and should be copied to | |
470 | * disk. If neither are active, we should NULL the inode. | |
03e01349 | 471 | * |
4d11a402 DC |
472 | * In all cases, the separate pquotino must remain 0 because it |
473 | * it beyond the "end" of the valid non-pquotino superblock. | |
ff55068c | 474 | */ |
4d11a402 | 475 | if (from->sb_qflags & XFS_GQUOTA_ACCT) |
ff55068c | 476 | to->sb_gquotino = cpu_to_be64(from->sb_gquotino); |
4d11a402 | 477 | else if (from->sb_qflags & XFS_PQUOTA_ACCT) |
ff55068c | 478 | to->sb_gquotino = cpu_to_be64(from->sb_pquotino); |
03e01349 DC |
479 | else { |
480 | /* | |
481 | * We can't rely on just the fields being logged to tell us | |
482 | * that it is safe to write NULLFSINO - we should only do that | |
483 | * if quotas are not actually enabled. Hence only write | |
484 | * NULLFSINO if both in-core quota inodes are NULL. | |
485 | */ | |
486 | if (from->sb_gquotino == NULLFSINO && | |
487 | from->sb_pquotino == NULLFSINO) | |
488 | to->sb_gquotino = cpu_to_be64(NULLFSINO); | |
489 | } | |
ff55068c | 490 | |
4d11a402 | 491 | to->sb_pquotino = 0; |
ff55068c DC |
492 | } |
493 | ||
ff55068c DC |
494 | void |
495 | xfs_sb_to_disk( | |
4d11a402 DC |
496 | struct xfs_dsb *to, |
497 | struct xfs_sb *from) | |
ff55068c | 498 | { |
4d11a402 DC |
499 | xfs_sb_quota_to_disk(to, from); |
500 | ||
501 | to->sb_magicnum = cpu_to_be32(from->sb_magicnum); | |
502 | to->sb_blocksize = cpu_to_be32(from->sb_blocksize); | |
503 | to->sb_dblocks = cpu_to_be64(from->sb_dblocks); | |
504 | to->sb_rblocks = cpu_to_be64(from->sb_rblocks); | |
505 | to->sb_rextents = cpu_to_be64(from->sb_rextents); | |
506 | memcpy(&to->sb_uuid, &from->sb_uuid, sizeof(to->sb_uuid)); | |
507 | to->sb_logstart = cpu_to_be64(from->sb_logstart); | |
508 | to->sb_rootino = cpu_to_be64(from->sb_rootino); | |
509 | to->sb_rbmino = cpu_to_be64(from->sb_rbmino); | |
510 | to->sb_rsumino = cpu_to_be64(from->sb_rsumino); | |
511 | to->sb_rextsize = cpu_to_be32(from->sb_rextsize); | |
512 | to->sb_agblocks = cpu_to_be32(from->sb_agblocks); | |
513 | to->sb_agcount = cpu_to_be32(from->sb_agcount); | |
514 | to->sb_rbmblocks = cpu_to_be32(from->sb_rbmblocks); | |
515 | to->sb_logblocks = cpu_to_be32(from->sb_logblocks); | |
516 | to->sb_versionnum = cpu_to_be16(from->sb_versionnum); | |
517 | to->sb_sectsize = cpu_to_be16(from->sb_sectsize); | |
518 | to->sb_inodesize = cpu_to_be16(from->sb_inodesize); | |
519 | to->sb_inopblock = cpu_to_be16(from->sb_inopblock); | |
520 | memcpy(&to->sb_fname, &from->sb_fname, sizeof(to->sb_fname)); | |
521 | to->sb_blocklog = from->sb_blocklog; | |
522 | to->sb_sectlog = from->sb_sectlog; | |
523 | to->sb_inodelog = from->sb_inodelog; | |
524 | to->sb_inopblog = from->sb_inopblog; | |
525 | to->sb_agblklog = from->sb_agblklog; | |
526 | to->sb_rextslog = from->sb_rextslog; | |
527 | to->sb_inprogress = from->sb_inprogress; | |
528 | to->sb_imax_pct = from->sb_imax_pct; | |
529 | to->sb_icount = cpu_to_be64(from->sb_icount); | |
530 | to->sb_ifree = cpu_to_be64(from->sb_ifree); | |
531 | to->sb_fdblocks = cpu_to_be64(from->sb_fdblocks); | |
532 | to->sb_frextents = cpu_to_be64(from->sb_frextents); | |
ff55068c | 533 | |
4d11a402 DC |
534 | to->sb_flags = from->sb_flags; |
535 | to->sb_shared_vn = from->sb_shared_vn; | |
536 | to->sb_inoalignmt = cpu_to_be32(from->sb_inoalignmt); | |
537 | to->sb_unit = cpu_to_be32(from->sb_unit); | |
538 | to->sb_width = cpu_to_be32(from->sb_width); | |
539 | to->sb_dirblklog = from->sb_dirblklog; | |
540 | to->sb_logsectlog = from->sb_logsectlog; | |
541 | to->sb_logsectsize = cpu_to_be16(from->sb_logsectsize); | |
542 | to->sb_logsunit = cpu_to_be32(from->sb_logsunit); | |
074e427b DC |
543 | |
544 | /* | |
545 | * We need to ensure that bad_features2 always matches features2. | |
546 | * Hence we enforce that here rather than having to remember to do it | |
547 | * everywhere else that updates features2. | |
548 | */ | |
549 | from->sb_bad_features2 = from->sb_features2; | |
4d11a402 DC |
550 | to->sb_features2 = cpu_to_be32(from->sb_features2); |
551 | to->sb_bad_features2 = cpu_to_be32(from->sb_bad_features2); | |
552 | ||
553 | if (xfs_sb_version_hascrc(from)) { | |
554 | to->sb_features_compat = cpu_to_be32(from->sb_features_compat); | |
555 | to->sb_features_ro_compat = | |
556 | cpu_to_be32(from->sb_features_ro_compat); | |
557 | to->sb_features_incompat = | |
558 | cpu_to_be32(from->sb_features_incompat); | |
559 | to->sb_features_log_incompat = | |
560 | cpu_to_be32(from->sb_features_log_incompat); | |
fb4f2b4e | 561 | to->sb_spino_align = cpu_to_be32(from->sb_spino_align); |
4d11a402 | 562 | to->sb_lsn = cpu_to_be64(from->sb_lsn); |
ce748eaa ES |
563 | if (xfs_sb_version_hasmetauuid(from)) |
564 | uuid_copy(&to->sb_meta_uuid, &from->sb_meta_uuid); | |
ff55068c DC |
565 | } |
566 | } | |
567 | ||
568 | static int | |
569 | xfs_sb_verify( | |
570 | struct xfs_buf *bp, | |
571 | bool check_version) | |
572 | { | |
573 | struct xfs_mount *mp = bp->b_target->bt_mount; | |
574 | struct xfs_sb sb; | |
575 | ||
5ef828c4 ES |
576 | /* |
577 | * Use call variant which doesn't convert quota flags from disk | |
578 | * format, because xfs_mount_validate_sb checks the on-disk flags. | |
579 | */ | |
580 | __xfs_sb_from_disk(&sb, XFS_BUF_TO_SBP(bp), false); | |
ff55068c DC |
581 | |
582 | /* | |
583 | * Only check the in progress field for the primary superblock as | |
584 | * mkfs.xfs doesn't clear it from secondary superblocks. | |
585 | */ | |
586 | return xfs_mount_validate_sb(mp, &sb, bp->b_bn == XFS_SB_DADDR, | |
587 | check_version); | |
588 | } | |
589 | ||
590 | /* | |
591 | * If the superblock has the CRC feature bit set or the CRC field is non-null, | |
592 | * check that the CRC is valid. We check the CRC field is non-null because a | |
593 | * single bit error could clear the feature bit and unused parts of the | |
594 | * superblock are supposed to be zero. Hence a non-null crc field indicates that | |
595 | * we've potentially lost a feature bit and we should check it anyway. | |
10e6e65d ES |
596 | * |
597 | * However, past bugs (i.e. in growfs) left non-zeroed regions beyond the | |
598 | * last field in V4 secondary superblocks. So for secondary superblocks, | |
599 | * we are more forgiving, and ignore CRC failures if the primary doesn't | |
600 | * indicate that the fs version is V5. | |
ff55068c DC |
601 | */ |
602 | static void | |
603 | xfs_sb_read_verify( | |
604 | struct xfs_buf *bp) | |
605 | { | |
606 | struct xfs_mount *mp = bp->b_target->bt_mount; | |
607 | struct xfs_dsb *dsb = XFS_BUF_TO_SBP(bp); | |
608 | int error; | |
609 | ||
610 | /* | |
611 | * open code the version check to avoid needing to convert the entire | |
612 | * superblock from disk order just to check the version number | |
613 | */ | |
614 | if (dsb->sb_magicnum == cpu_to_be32(XFS_SB_MAGIC) && | |
615 | (((be16_to_cpu(dsb->sb_versionnum) & XFS_SB_VERSION_NUMBITS) == | |
616 | XFS_SB_VERSION_5) || | |
617 | dsb->sb_crc != 0)) { | |
618 | ||
51582170 | 619 | if (!xfs_buf_verify_cksum(bp, XFS_SB_CRC_OFF)) { |
10e6e65d | 620 | /* Only fail bad secondaries on a known V5 filesystem */ |
7a01e707 | 621 | if (bp->b_bn == XFS_SB_DADDR || |
10e6e65d | 622 | xfs_sb_version_hascrc(&mp->m_sb)) { |
2451337d | 623 | error = -EFSBADCRC; |
10e6e65d ES |
624 | goto out_error; |
625 | } | |
ff55068c DC |
626 | } |
627 | } | |
628 | error = xfs_sb_verify(bp, true); | |
629 | ||
630 | out_error: | |
631 | if (error) { | |
ff55068c | 632 | xfs_buf_ioerror(bp, error); |
2451337d | 633 | if (error == -EFSCORRUPTED || error == -EFSBADCRC) |
ce5028cf | 634 | xfs_verifier_error(bp); |
ff55068c DC |
635 | } |
636 | } | |
637 | ||
638 | /* | |
639 | * We may be probed for a filesystem match, so we may not want to emit | |
640 | * messages when the superblock buffer is not actually an XFS superblock. | |
2533787a | 641 | * If we find an XFS superblock, then run a normal, noisy mount because we are |
ff55068c DC |
642 | * really going to mount it and want to know about errors. |
643 | */ | |
644 | static void | |
645 | xfs_sb_quiet_read_verify( | |
646 | struct xfs_buf *bp) | |
647 | { | |
648 | struct xfs_dsb *dsb = XFS_BUF_TO_SBP(bp); | |
649 | ||
ff55068c DC |
650 | if (dsb->sb_magicnum == cpu_to_be32(XFS_SB_MAGIC)) { |
651 | /* XFS filesystem, verify noisily! */ | |
652 | xfs_sb_read_verify(bp); | |
653 | return; | |
654 | } | |
655 | /* quietly fail */ | |
2451337d | 656 | xfs_buf_ioerror(bp, -EWRONGFS); |
ff55068c DC |
657 | } |
658 | ||
659 | static void | |
660 | xfs_sb_write_verify( | |
661 | struct xfs_buf *bp) | |
662 | { | |
663 | struct xfs_mount *mp = bp->b_target->bt_mount; | |
664 | struct xfs_buf_log_item *bip = bp->b_fspriv; | |
665 | int error; | |
666 | ||
667 | error = xfs_sb_verify(bp, false); | |
668 | if (error) { | |
ff55068c | 669 | xfs_buf_ioerror(bp, error); |
ce5028cf | 670 | xfs_verifier_error(bp); |
ff55068c DC |
671 | return; |
672 | } | |
673 | ||
674 | if (!xfs_sb_version_hascrc(&mp->m_sb)) | |
675 | return; | |
676 | ||
677 | if (bip) | |
678 | XFS_BUF_TO_SBP(bp)->sb_lsn = cpu_to_be64(bip->bli_item.li_lsn); | |
679 | ||
f1dbcd7e | 680 | xfs_buf_update_cksum(bp, XFS_SB_CRC_OFF); |
ff55068c DC |
681 | } |
682 | ||
683 | const struct xfs_buf_ops xfs_sb_buf_ops = { | |
233135b7 | 684 | .name = "xfs_sb", |
ff55068c DC |
685 | .verify_read = xfs_sb_read_verify, |
686 | .verify_write = xfs_sb_write_verify, | |
687 | }; | |
688 | ||
689 | const struct xfs_buf_ops xfs_sb_quiet_buf_ops = { | |
233135b7 | 690 | .name = "xfs_sb_quiet", |
ff55068c DC |
691 | .verify_read = xfs_sb_quiet_read_verify, |
692 | .verify_write = xfs_sb_write_verify, | |
693 | }; | |
694 | ||
695 | /* | |
696 | * xfs_mount_common | |
697 | * | |
698 | * Mount initialization code establishing various mount | |
699 | * fields from the superblock associated with the given | |
700 | * mount structure | |
701 | */ | |
702 | void | |
703 | xfs_sb_mount_common( | |
704 | struct xfs_mount *mp, | |
705 | struct xfs_sb *sbp) | |
706 | { | |
707 | mp->m_agfrotor = mp->m_agirotor = 0; | |
708 | spin_lock_init(&mp->m_agirotor_lock); | |
709 | mp->m_maxagi = mp->m_sb.sb_agcount; | |
710 | mp->m_blkbit_log = sbp->sb_blocklog + XFS_NBBYLOG; | |
711 | mp->m_blkbb_log = sbp->sb_blocklog - BBSHIFT; | |
712 | mp->m_sectbb_log = sbp->sb_sectlog - BBSHIFT; | |
713 | mp->m_agno_log = xfs_highbit32(sbp->sb_agcount - 1) + 1; | |
714 | mp->m_agino_log = sbp->sb_inopblog + sbp->sb_agblklog; | |
715 | mp->m_blockmask = sbp->sb_blocksize - 1; | |
716 | mp->m_blockwsize = sbp->sb_blocksize >> XFS_WORDLOG; | |
717 | mp->m_blockwmask = mp->m_blockwsize - 1; | |
718 | ||
719 | mp->m_alloc_mxr[0] = xfs_allocbt_maxrecs(mp, sbp->sb_blocksize, 1); | |
720 | mp->m_alloc_mxr[1] = xfs_allocbt_maxrecs(mp, sbp->sb_blocksize, 0); | |
721 | mp->m_alloc_mnr[0] = mp->m_alloc_mxr[0] / 2; | |
722 | mp->m_alloc_mnr[1] = mp->m_alloc_mxr[1] / 2; | |
723 | ||
724 | mp->m_inobt_mxr[0] = xfs_inobt_maxrecs(mp, sbp->sb_blocksize, 1); | |
725 | mp->m_inobt_mxr[1] = xfs_inobt_maxrecs(mp, sbp->sb_blocksize, 0); | |
726 | mp->m_inobt_mnr[0] = mp->m_inobt_mxr[0] / 2; | |
727 | mp->m_inobt_mnr[1] = mp->m_inobt_mxr[1] / 2; | |
728 | ||
729 | mp->m_bmap_dmxr[0] = xfs_bmbt_maxrecs(mp, sbp->sb_blocksize, 1); | |
730 | mp->m_bmap_dmxr[1] = xfs_bmbt_maxrecs(mp, sbp->sb_blocksize, 0); | |
731 | mp->m_bmap_dmnr[0] = mp->m_bmap_dmxr[0] / 2; | |
732 | mp->m_bmap_dmnr[1] = mp->m_bmap_dmxr[1] / 2; | |
733 | ||
035e00ac DW |
734 | mp->m_rmap_mxr[0] = xfs_rmapbt_maxrecs(mp, sbp->sb_blocksize, 1); |
735 | mp->m_rmap_mxr[1] = xfs_rmapbt_maxrecs(mp, sbp->sb_blocksize, 0); | |
736 | mp->m_rmap_mnr[0] = mp->m_rmap_mxr[0] / 2; | |
737 | mp->m_rmap_mnr[1] = mp->m_rmap_mxr[1] / 2; | |
738 | ||
ff55068c DC |
739 | mp->m_bsize = XFS_FSB_TO_BB(mp, 1); |
740 | mp->m_ialloc_inos = (int)MAX((__uint16_t)XFS_INODES_PER_CHUNK, | |
741 | sbp->sb_inopblock); | |
742 | mp->m_ialloc_blks = mp->m_ialloc_inos >> sbp->sb_inopblog; | |
066a1884 BF |
743 | |
744 | if (sbp->sb_spino_align) | |
745 | mp->m_ialloc_min_blks = sbp->sb_spino_align; | |
746 | else | |
747 | mp->m_ialloc_min_blks = mp->m_ialloc_blks; | |
52548852 DW |
748 | mp->m_alloc_set_aside = xfs_alloc_set_aside(mp); |
749 | mp->m_ag_max_usable = xfs_alloc_ag_max_usable(mp); | |
ff55068c DC |
750 | } |
751 | ||
752 | /* | |
753 | * xfs_initialize_perag_data | |
754 | * | |
755 | * Read in each per-ag structure so we can count up the number of | |
756 | * allocated inodes, free inodes and used filesystem blocks as this | |
757 | * information is no longer persistent in the superblock. Once we have | |
758 | * this information, write it into the in-core superblock structure. | |
759 | */ | |
760 | int | |
761 | xfs_initialize_perag_data( | |
762 | struct xfs_mount *mp, | |
763 | xfs_agnumber_t agcount) | |
764 | { | |
765 | xfs_agnumber_t index; | |
766 | xfs_perag_t *pag; | |
767 | xfs_sb_t *sbp = &mp->m_sb; | |
768 | uint64_t ifree = 0; | |
769 | uint64_t ialloc = 0; | |
770 | uint64_t bfree = 0; | |
771 | uint64_t bfreelst = 0; | |
772 | uint64_t btree = 0; | |
773 | int error; | |
774 | ||
775 | for (index = 0; index < agcount; index++) { | |
776 | /* | |
777 | * read the agf, then the agi. This gets us | |
778 | * all the information we need and populates the | |
779 | * per-ag structures for us. | |
780 | */ | |
781 | error = xfs_alloc_pagf_init(mp, NULL, index, 0); | |
782 | if (error) | |
783 | return error; | |
784 | ||
785 | error = xfs_ialloc_pagi_init(mp, NULL, index); | |
786 | if (error) | |
787 | return error; | |
788 | pag = xfs_perag_get(mp, index); | |
789 | ifree += pag->pagi_freecount; | |
790 | ialloc += pag->pagi_count; | |
791 | bfree += pag->pagf_freeblks; | |
792 | bfreelst += pag->pagf_flcount; | |
793 | btree += pag->pagf_btreeblks; | |
794 | xfs_perag_put(pag); | |
795 | } | |
5681ca40 DC |
796 | |
797 | /* Overwrite incore superblock counters with just-read data */ | |
ff55068c DC |
798 | spin_lock(&mp->m_sb_lock); |
799 | sbp->sb_ifree = ifree; | |
800 | sbp->sb_icount = ialloc; | |
801 | sbp->sb_fdblocks = bfree + bfreelst + btree; | |
802 | spin_unlock(&mp->m_sb_lock); | |
803 | ||
5681ca40 | 804 | xfs_reinit_percpu_counters(mp); |
ff55068c DC |
805 | |
806 | return 0; | |
807 | } | |
808 | ||
809 | /* | |
61e63ecb DC |
810 | * xfs_log_sb() can be used to copy arbitrary changes to the in-core superblock |
811 | * into the superblock buffer to be logged. It does not provide the higher | |
812 | * level of locking that is needed to protect the in-core superblock from | |
813 | * concurrent access. | |
ff55068c DC |
814 | */ |
815 | void | |
61e63ecb | 816 | xfs_log_sb( |
4d11a402 | 817 | struct xfs_trans *tp) |
ff55068c | 818 | { |
4d11a402 DC |
819 | struct xfs_mount *mp = tp->t_mountp; |
820 | struct xfs_buf *bp = xfs_trans_getsb(tp, mp, 0); | |
ff55068c | 821 | |
501ab323 | 822 | mp->m_sb.sb_icount = percpu_counter_sum(&mp->m_icount); |
e88b64ea | 823 | mp->m_sb.sb_ifree = percpu_counter_sum(&mp->m_ifree); |
0d485ada | 824 | mp->m_sb.sb_fdblocks = percpu_counter_sum(&mp->m_fdblocks); |
501ab323 | 825 | |
4d11a402 | 826 | xfs_sb_to_disk(XFS_BUF_TO_SBP(bp), &mp->m_sb); |
ff55068c | 827 | xfs_trans_buf_set_type(tp, bp, XFS_BLFT_SB_BUF); |
4d11a402 | 828 | xfs_trans_log_buf(tp, bp, 0, sizeof(struct xfs_dsb)); |
ff55068c | 829 | } |
61e63ecb DC |
830 | |
831 | /* | |
832 | * xfs_sync_sb | |
833 | * | |
834 | * Sync the superblock to disk. | |
835 | * | |
836 | * Note that the caller is responsible for checking the frozen state of the | |
837 | * filesystem. This procedure uses the non-blocking transaction allocator and | |
838 | * thus will allow modifications to a frozen fs. This is required because this | |
839 | * code can be called during the process of freezing where use of the high-level | |
840 | * allocator would deadlock. | |
841 | */ | |
842 | int | |
843 | xfs_sync_sb( | |
844 | struct xfs_mount *mp, | |
845 | bool wait) | |
846 | { | |
847 | struct xfs_trans *tp; | |
848 | int error; | |
849 | ||
253f4911 CH |
850 | error = xfs_trans_alloc(mp, &M_RES(mp)->tr_sb, 0, 0, |
851 | XFS_TRANS_NO_WRITECOUNT, &tp); | |
852 | if (error) | |
61e63ecb | 853 | return error; |
61e63ecb DC |
854 | |
855 | xfs_log_sb(tp); | |
856 | if (wait) | |
857 | xfs_trans_set_sync(tp); | |
70393313 | 858 | return xfs_trans_commit(tp); |
61e63ecb | 859 | } |