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" |
1946b91c DW |
41 | #include "xfs_bmap.h" |
42 | #include "xfs_refcount_btree.h" | |
c368ebcd DW |
43 | #include "xfs_da_format.h" |
44 | #include "xfs_da_btree.h" | |
ff55068c DC |
45 | |
46 | /* | |
47 | * Physical superblock buffer manipulations. Shared with libxfs in userspace. | |
48 | */ | |
49 | ||
ff55068c DC |
50 | /* |
51 | * Reference counting access wrappers to the perag structures. | |
52 | * Because we never free per-ag structures, the only thing we | |
53 | * have to protect against changes is the tree structure itself. | |
54 | */ | |
55 | struct xfs_perag * | |
56 | xfs_perag_get( | |
57 | struct xfs_mount *mp, | |
58 | xfs_agnumber_t agno) | |
59 | { | |
60 | struct xfs_perag *pag; | |
61 | int ref = 0; | |
62 | ||
63 | rcu_read_lock(); | |
64 | pag = radix_tree_lookup(&mp->m_perag_tree, agno); | |
65 | if (pag) { | |
66 | ASSERT(atomic_read(&pag->pag_ref) >= 0); | |
67 | ref = atomic_inc_return(&pag->pag_ref); | |
68 | } | |
69 | rcu_read_unlock(); | |
70 | trace_xfs_perag_get(mp, agno, ref, _RET_IP_); | |
71 | return pag; | |
72 | } | |
73 | ||
74 | /* | |
75 | * search from @first to find the next perag with the given tag set. | |
76 | */ | |
77 | struct xfs_perag * | |
78 | xfs_perag_get_tag( | |
79 | struct xfs_mount *mp, | |
80 | xfs_agnumber_t first, | |
81 | int tag) | |
82 | { | |
83 | struct xfs_perag *pag; | |
84 | int found; | |
85 | int ref; | |
86 | ||
87 | rcu_read_lock(); | |
88 | found = radix_tree_gang_lookup_tag(&mp->m_perag_tree, | |
89 | (void **)&pag, first, 1, tag); | |
90 | if (found <= 0) { | |
91 | rcu_read_unlock(); | |
92 | return NULL; | |
93 | } | |
94 | ref = atomic_inc_return(&pag->pag_ref); | |
95 | rcu_read_unlock(); | |
96 | trace_xfs_perag_get_tag(mp, pag->pag_agno, ref, _RET_IP_); | |
97 | return pag; | |
98 | } | |
99 | ||
100 | void | |
101 | xfs_perag_put( | |
102 | struct xfs_perag *pag) | |
103 | { | |
104 | int ref; | |
105 | ||
106 | ASSERT(atomic_read(&pag->pag_ref) > 0); | |
107 | ref = atomic_dec_return(&pag->pag_ref); | |
108 | trace_xfs_perag_put(pag->pag_mount, pag->pag_agno, ref, _RET_IP_); | |
109 | } | |
110 | ||
111 | /* | |
112 | * Check the validity of the SB found. | |
113 | */ | |
114 | STATIC int | |
115 | xfs_mount_validate_sb( | |
116 | xfs_mount_t *mp, | |
117 | xfs_sb_t *sbp, | |
118 | bool check_inprogress, | |
119 | bool check_version) | |
120 | { | |
131fa58d DW |
121 | uint32_t agcount = 0; |
122 | uint32_t rem; | |
4bb73d01 | 123 | |
ff55068c DC |
124 | if (sbp->sb_magicnum != XFS_SB_MAGIC) { |
125 | xfs_warn(mp, "bad magic number"); | |
2451337d | 126 | return -EWRONGFS; |
ff55068c DC |
127 | } |
128 | ||
129 | ||
130 | if (!xfs_sb_good_version(sbp)) { | |
131 | xfs_warn(mp, "bad version"); | |
2451337d | 132 | return -EWRONGFS; |
ff55068c DC |
133 | } |
134 | ||
135 | /* | |
136 | * Version 5 superblock feature mask validation. Reject combinations the | |
137 | * kernel cannot support up front before checking anything else. For | |
138 | * write validation, we don't need to check feature masks. | |
139 | */ | |
140 | if (check_version && XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) { | |
ff55068c DC |
141 | if (xfs_sb_has_compat_feature(sbp, |
142 | XFS_SB_FEAT_COMPAT_UNKNOWN)) { | |
143 | xfs_warn(mp, | |
f41febd2 | 144 | "Superblock has unknown compatible features (0x%x) enabled.", |
ff55068c DC |
145 | (sbp->sb_features_compat & |
146 | XFS_SB_FEAT_COMPAT_UNKNOWN)); | |
f41febd2 JP |
147 | xfs_warn(mp, |
148 | "Using a more recent kernel is recommended."); | |
ff55068c DC |
149 | } |
150 | ||
151 | if (xfs_sb_has_ro_compat_feature(sbp, | |
152 | XFS_SB_FEAT_RO_COMPAT_UNKNOWN)) { | |
153 | xfs_alert(mp, | |
154 | "Superblock has unknown read-only compatible features (0x%x) enabled.", | |
155 | (sbp->sb_features_ro_compat & | |
156 | XFS_SB_FEAT_RO_COMPAT_UNKNOWN)); | |
157 | if (!(mp->m_flags & XFS_MOUNT_RDONLY)) { | |
158 | xfs_warn(mp, | |
f41febd2 JP |
159 | "Attempted to mount read-only compatible filesystem read-write."); |
160 | xfs_warn(mp, | |
ff55068c | 161 | "Filesystem can only be safely mounted read only."); |
f41febd2 | 162 | |
2451337d | 163 | return -EINVAL; |
ff55068c DC |
164 | } |
165 | } | |
166 | if (xfs_sb_has_incompat_feature(sbp, | |
167 | XFS_SB_FEAT_INCOMPAT_UNKNOWN)) { | |
168 | xfs_warn(mp, | |
f41febd2 | 169 | "Superblock has unknown incompatible features (0x%x) enabled.", |
ff55068c DC |
170 | (sbp->sb_features_incompat & |
171 | XFS_SB_FEAT_INCOMPAT_UNKNOWN)); | |
f41febd2 JP |
172 | xfs_warn(mp, |
173 | "Filesystem can not be safely mounted by this kernel."); | |
2451337d | 174 | return -EINVAL; |
ff55068c | 175 | } |
a45086e2 BF |
176 | } else if (xfs_sb_version_hascrc(sbp)) { |
177 | /* | |
178 | * We can't read verify the sb LSN because the read verifier is | |
179 | * called before the log is allocated and processed. We know the | |
180 | * log is set up before write verifier (!check_version) calls, | |
181 | * so just check it here. | |
182 | */ | |
183 | if (!xfs_log_check_lsn(mp, sbp->sb_lsn)) | |
184 | return -EFSCORRUPTED; | |
ff55068c DC |
185 | } |
186 | ||
187 | if (xfs_sb_version_has_pquotino(sbp)) { | |
188 | if (sbp->sb_qflags & (XFS_OQUOTA_ENFD | XFS_OQUOTA_CHKD)) { | |
189 | xfs_notice(mp, | |
08e96e1a | 190 | "Version 5 of Super block has XFS_OQUOTA bits."); |
2451337d | 191 | return -EFSCORRUPTED; |
ff55068c DC |
192 | } |
193 | } else if (sbp->sb_qflags & (XFS_PQUOTA_ENFD | XFS_GQUOTA_ENFD | | |
194 | XFS_PQUOTA_CHKD | XFS_GQUOTA_CHKD)) { | |
195 | xfs_notice(mp, | |
08e96e1a | 196 | "Superblock earlier than Version 5 has XFS_[PQ]UOTA_{ENFD|CHKD} bits."); |
2451337d | 197 | return -EFSCORRUPTED; |
ff55068c DC |
198 | } |
199 | ||
e5376fc1 BF |
200 | /* |
201 | * Full inode chunks must be aligned to inode chunk size when | |
202 | * sparse inodes are enabled to support the sparse chunk | |
203 | * allocation algorithm and prevent overlapping inode records. | |
204 | */ | |
205 | if (xfs_sb_version_hassparseinodes(sbp)) { | |
206 | uint32_t align; | |
207 | ||
e5376fc1 BF |
208 | align = XFS_INODES_PER_CHUNK * sbp->sb_inodesize |
209 | >> sbp->sb_blocklog; | |
210 | if (sbp->sb_inoalignmt != align) { | |
211 | xfs_warn(mp, | |
212 | "Inode block alignment (%u) must match chunk size (%u) for sparse inodes.", | |
213 | sbp->sb_inoalignmt, align); | |
214 | return -EINVAL; | |
215 | } | |
216 | } | |
217 | ||
ff55068c DC |
218 | if (unlikely( |
219 | sbp->sb_logstart == 0 && mp->m_logdev_targp == mp->m_ddev_targp)) { | |
220 | xfs_warn(mp, | |
221 | "filesystem is marked as having an external log; " | |
222 | "specify logdev on the mount command line."); | |
2451337d | 223 | return -EINVAL; |
ff55068c DC |
224 | } |
225 | ||
226 | if (unlikely( | |
227 | sbp->sb_logstart != 0 && mp->m_logdev_targp != mp->m_ddev_targp)) { | |
228 | xfs_warn(mp, | |
229 | "filesystem is marked as having an internal log; " | |
230 | "do not specify logdev on the mount command line."); | |
2451337d | 231 | return -EINVAL; |
ff55068c DC |
232 | } |
233 | ||
4bb73d01 DW |
234 | /* Compute agcount for this number of dblocks and agblocks */ |
235 | if (sbp->sb_agblocks) { | |
236 | agcount = div_u64_rem(sbp->sb_dblocks, sbp->sb_agblocks, &rem); | |
237 | if (rem) | |
238 | agcount++; | |
239 | } | |
240 | ||
ff55068c DC |
241 | /* |
242 | * More sanity checking. Most of these were stolen directly from | |
243 | * xfs_repair. | |
244 | */ | |
245 | if (unlikely( | |
246 | sbp->sb_agcount <= 0 || | |
247 | sbp->sb_sectsize < XFS_MIN_SECTORSIZE || | |
248 | sbp->sb_sectsize > XFS_MAX_SECTORSIZE || | |
249 | sbp->sb_sectlog < XFS_MIN_SECTORSIZE_LOG || | |
250 | sbp->sb_sectlog > XFS_MAX_SECTORSIZE_LOG || | |
251 | sbp->sb_sectsize != (1 << sbp->sb_sectlog) || | |
252 | sbp->sb_blocksize < XFS_MIN_BLOCKSIZE || | |
253 | sbp->sb_blocksize > XFS_MAX_BLOCKSIZE || | |
254 | sbp->sb_blocklog < XFS_MIN_BLOCKSIZE_LOG || | |
255 | sbp->sb_blocklog > XFS_MAX_BLOCKSIZE_LOG || | |
256 | sbp->sb_blocksize != (1 << sbp->sb_blocklog) || | |
83d230eb | 257 | sbp->sb_dirblklog + sbp->sb_blocklog > XFS_MAX_BLOCKSIZE_LOG || |
ff55068c DC |
258 | sbp->sb_inodesize < XFS_DINODE_MIN_SIZE || |
259 | sbp->sb_inodesize > XFS_DINODE_MAX_SIZE || | |
260 | sbp->sb_inodelog < XFS_DINODE_MIN_LOG || | |
261 | sbp->sb_inodelog > XFS_DINODE_MAX_LOG || | |
262 | sbp->sb_inodesize != (1 << sbp->sb_inodelog) || | |
e1b05723 | 263 | sbp->sb_logsunit > XLOG_MAX_RECORD_BSIZE || |
392c6de9 | 264 | sbp->sb_inopblock != howmany(sbp->sb_blocksize,sbp->sb_inodesize) || |
4bb73d01 DW |
265 | XFS_FSB_TO_B(mp, sbp->sb_agblocks) < XFS_MIN_AG_BYTES || |
266 | XFS_FSB_TO_B(mp, sbp->sb_agblocks) > XFS_MAX_AG_BYTES || | |
267 | sbp->sb_agblklog != xfs_highbit32(sbp->sb_agblocks - 1) + 1 || | |
268 | agcount == 0 || agcount != sbp->sb_agcount || | |
ff55068c DC |
269 | (sbp->sb_blocklog - sbp->sb_inodelog != sbp->sb_inopblog) || |
270 | (sbp->sb_rextsize * sbp->sb_blocksize > XFS_MAX_RTEXTSIZE) || | |
271 | (sbp->sb_rextsize * sbp->sb_blocksize < XFS_MIN_RTEXTSIZE) || | |
272 | (sbp->sb_imax_pct > 100 /* zero sb_imax_pct is valid */) || | |
273 | sbp->sb_dblocks == 0 || | |
274 | sbp->sb_dblocks > XFS_MAX_DBLOCKS(sbp) || | |
ab3e57b5 DC |
275 | sbp->sb_dblocks < XFS_MIN_DBLOCKS(sbp) || |
276 | sbp->sb_shared_vn != 0)) { | |
5ef11eb0 | 277 | xfs_notice(mp, "SB sanity check failed"); |
2451337d | 278 | return -EFSCORRUPTED; |
bec9d48d DW |
279 | } |
280 | ||
281 | if (xfs_sb_version_hascrc(&mp->m_sb) && | |
282 | sbp->sb_blocksize < XFS_MIN_CRC_BLOCKSIZE) { | |
283 | xfs_notice(mp, "v5 SB sanity check failed"); | |
284 | return -EFSCORRUPTED; | |
ff55068c DC |
285 | } |
286 | ||
287 | /* | |
288 | * Until this is fixed only page-sized or smaller data blocks work. | |
289 | */ | |
290 | if (unlikely(sbp->sb_blocksize > PAGE_SIZE)) { | |
291 | xfs_warn(mp, | |
292 | "File system with blocksize %d bytes. " | |
293 | "Only pagesize (%ld) or less will currently work.", | |
294 | sbp->sb_blocksize, PAGE_SIZE); | |
2451337d | 295 | return -ENOSYS; |
ff55068c DC |
296 | } |
297 | ||
298 | /* | |
299 | * Currently only very few inode sizes are supported. | |
300 | */ | |
301 | switch (sbp->sb_inodesize) { | |
302 | case 256: | |
303 | case 512: | |
304 | case 1024: | |
305 | case 2048: | |
306 | break; | |
307 | default: | |
308 | xfs_warn(mp, "inode size of %d bytes not supported", | |
309 | sbp->sb_inodesize); | |
2451337d | 310 | return -ENOSYS; |
ff55068c DC |
311 | } |
312 | ||
313 | if (xfs_sb_validate_fsb_count(sbp, sbp->sb_dblocks) || | |
314 | xfs_sb_validate_fsb_count(sbp, sbp->sb_rblocks)) { | |
315 | xfs_warn(mp, | |
316 | "file system too large to be mounted on this system."); | |
2451337d | 317 | return -EFBIG; |
ff55068c DC |
318 | } |
319 | ||
320 | if (check_inprogress && sbp->sb_inprogress) { | |
321 | xfs_warn(mp, "Offline file system operation in progress!"); | |
2451337d | 322 | return -EFSCORRUPTED; |
ff55068c | 323 | } |
ff55068c DC |
324 | return 0; |
325 | } | |
326 | ||
327 | void | |
328 | xfs_sb_quota_from_disk(struct xfs_sb *sbp) | |
329 | { | |
330 | /* | |
331 | * older mkfs doesn't initialize quota inodes to NULLFSINO. This | |
332 | * leads to in-core values having two different values for a quota | |
333 | * inode to be invalid: 0 and NULLFSINO. Change it to a single value | |
334 | * NULLFSINO. | |
335 | * | |
336 | * Note that this change affect only the in-core values. These | |
337 | * values are not written back to disk unless any quota information | |
338 | * is written to the disk. Even in that case, sb_pquotino field is | |
339 | * not written to disk unless the superblock supports pquotino. | |
340 | */ | |
341 | if (sbp->sb_uquotino == 0) | |
342 | sbp->sb_uquotino = NULLFSINO; | |
343 | if (sbp->sb_gquotino == 0) | |
344 | sbp->sb_gquotino = NULLFSINO; | |
345 | if (sbp->sb_pquotino == 0) | |
346 | sbp->sb_pquotino = NULLFSINO; | |
347 | ||
348 | /* | |
349 | * We need to do these manipilations only if we are working | |
350 | * with an older version of on-disk superblock. | |
351 | */ | |
352 | if (xfs_sb_version_has_pquotino(sbp)) | |
353 | return; | |
354 | ||
355 | if (sbp->sb_qflags & XFS_OQUOTA_ENFD) | |
356 | sbp->sb_qflags |= (sbp->sb_qflags & XFS_PQUOTA_ACCT) ? | |
357 | XFS_PQUOTA_ENFD : XFS_GQUOTA_ENFD; | |
358 | if (sbp->sb_qflags & XFS_OQUOTA_CHKD) | |
359 | sbp->sb_qflags |= (sbp->sb_qflags & XFS_PQUOTA_ACCT) ? | |
360 | XFS_PQUOTA_CHKD : XFS_GQUOTA_CHKD; | |
361 | sbp->sb_qflags &= ~(XFS_OQUOTA_ENFD | XFS_OQUOTA_CHKD); | |
362 | ||
e6fc6fcf ES |
363 | if (sbp->sb_qflags & XFS_PQUOTA_ACCT && |
364 | sbp->sb_gquotino != NULLFSINO) { | |
ff55068c DC |
365 | /* |
366 | * In older version of superblock, on-disk superblock only | |
367 | * has sb_gquotino, and in-core superblock has both sb_gquotino | |
368 | * and sb_pquotino. But, only one of them is supported at any | |
369 | * point of time. So, if PQUOTA is set in disk superblock, | |
e6fc6fcf ES |
370 | * copy over sb_gquotino to sb_pquotino. The NULLFSINO test |
371 | * above is to make sure we don't do this twice and wipe them | |
372 | * both out! | |
ff55068c DC |
373 | */ |
374 | sbp->sb_pquotino = sbp->sb_gquotino; | |
375 | sbp->sb_gquotino = NULLFSINO; | |
376 | } | |
377 | } | |
378 | ||
5ef828c4 ES |
379 | static void |
380 | __xfs_sb_from_disk( | |
ff55068c | 381 | struct xfs_sb *to, |
5ef828c4 ES |
382 | xfs_dsb_t *from, |
383 | bool convert_xquota) | |
ff55068c DC |
384 | { |
385 | to->sb_magicnum = be32_to_cpu(from->sb_magicnum); | |
386 | to->sb_blocksize = be32_to_cpu(from->sb_blocksize); | |
387 | to->sb_dblocks = be64_to_cpu(from->sb_dblocks); | |
388 | to->sb_rblocks = be64_to_cpu(from->sb_rblocks); | |
389 | to->sb_rextents = be64_to_cpu(from->sb_rextents); | |
390 | memcpy(&to->sb_uuid, &from->sb_uuid, sizeof(to->sb_uuid)); | |
391 | to->sb_logstart = be64_to_cpu(from->sb_logstart); | |
392 | to->sb_rootino = be64_to_cpu(from->sb_rootino); | |
393 | to->sb_rbmino = be64_to_cpu(from->sb_rbmino); | |
394 | to->sb_rsumino = be64_to_cpu(from->sb_rsumino); | |
395 | to->sb_rextsize = be32_to_cpu(from->sb_rextsize); | |
396 | to->sb_agblocks = be32_to_cpu(from->sb_agblocks); | |
397 | to->sb_agcount = be32_to_cpu(from->sb_agcount); | |
398 | to->sb_rbmblocks = be32_to_cpu(from->sb_rbmblocks); | |
399 | to->sb_logblocks = be32_to_cpu(from->sb_logblocks); | |
400 | to->sb_versionnum = be16_to_cpu(from->sb_versionnum); | |
401 | to->sb_sectsize = be16_to_cpu(from->sb_sectsize); | |
402 | to->sb_inodesize = be16_to_cpu(from->sb_inodesize); | |
403 | to->sb_inopblock = be16_to_cpu(from->sb_inopblock); | |
404 | memcpy(&to->sb_fname, &from->sb_fname, sizeof(to->sb_fname)); | |
405 | to->sb_blocklog = from->sb_blocklog; | |
406 | to->sb_sectlog = from->sb_sectlog; | |
407 | to->sb_inodelog = from->sb_inodelog; | |
408 | to->sb_inopblog = from->sb_inopblog; | |
409 | to->sb_agblklog = from->sb_agblklog; | |
410 | to->sb_rextslog = from->sb_rextslog; | |
411 | to->sb_inprogress = from->sb_inprogress; | |
412 | to->sb_imax_pct = from->sb_imax_pct; | |
413 | to->sb_icount = be64_to_cpu(from->sb_icount); | |
414 | to->sb_ifree = be64_to_cpu(from->sb_ifree); | |
415 | to->sb_fdblocks = be64_to_cpu(from->sb_fdblocks); | |
416 | to->sb_frextents = be64_to_cpu(from->sb_frextents); | |
417 | to->sb_uquotino = be64_to_cpu(from->sb_uquotino); | |
418 | to->sb_gquotino = be64_to_cpu(from->sb_gquotino); | |
419 | to->sb_qflags = be16_to_cpu(from->sb_qflags); | |
420 | to->sb_flags = from->sb_flags; | |
421 | to->sb_shared_vn = from->sb_shared_vn; | |
422 | to->sb_inoalignmt = be32_to_cpu(from->sb_inoalignmt); | |
423 | to->sb_unit = be32_to_cpu(from->sb_unit); | |
424 | to->sb_width = be32_to_cpu(from->sb_width); | |
425 | to->sb_dirblklog = from->sb_dirblklog; | |
426 | to->sb_logsectlog = from->sb_logsectlog; | |
427 | to->sb_logsectsize = be16_to_cpu(from->sb_logsectsize); | |
428 | to->sb_logsunit = be32_to_cpu(from->sb_logsunit); | |
429 | to->sb_features2 = be32_to_cpu(from->sb_features2); | |
430 | to->sb_bad_features2 = be32_to_cpu(from->sb_bad_features2); | |
431 | to->sb_features_compat = be32_to_cpu(from->sb_features_compat); | |
432 | to->sb_features_ro_compat = be32_to_cpu(from->sb_features_ro_compat); | |
433 | to->sb_features_incompat = be32_to_cpu(from->sb_features_incompat); | |
434 | to->sb_features_log_incompat = | |
435 | be32_to_cpu(from->sb_features_log_incompat); | |
04dd1a0d ES |
436 | /* crc is only used on disk, not in memory; just init to 0 here. */ |
437 | to->sb_crc = 0; | |
fb4f2b4e | 438 | to->sb_spino_align = be32_to_cpu(from->sb_spino_align); |
ff55068c DC |
439 | to->sb_pquotino = be64_to_cpu(from->sb_pquotino); |
440 | to->sb_lsn = be64_to_cpu(from->sb_lsn); | |
ce748eaa ES |
441 | /* |
442 | * sb_meta_uuid is only on disk if it differs from sb_uuid and the | |
443 | * feature flag is set; if not set we keep it only in memory. | |
444 | */ | |
445 | if (xfs_sb_version_hasmetauuid(to)) | |
446 | uuid_copy(&to->sb_meta_uuid, &from->sb_meta_uuid); | |
447 | else | |
448 | uuid_copy(&to->sb_meta_uuid, &from->sb_uuid); | |
5ef828c4 ES |
449 | /* Convert on-disk flags to in-memory flags? */ |
450 | if (convert_xquota) | |
451 | xfs_sb_quota_from_disk(to); | |
452 | } | |
453 | ||
454 | void | |
455 | xfs_sb_from_disk( | |
456 | struct xfs_sb *to, | |
457 | xfs_dsb_t *from) | |
458 | { | |
459 | __xfs_sb_from_disk(to, from, true); | |
ff55068c DC |
460 | } |
461 | ||
4d11a402 | 462 | static void |
ff55068c | 463 | xfs_sb_quota_to_disk( |
4d11a402 DC |
464 | struct xfs_dsb *to, |
465 | struct xfs_sb *from) | |
ff55068c | 466 | { |
c8ce540d | 467 | uint16_t qflags = from->sb_qflags; |
ff55068c | 468 | |
4d11a402 DC |
469 | to->sb_uquotino = cpu_to_be64(from->sb_uquotino); |
470 | if (xfs_sb_version_has_pquotino(from)) { | |
471 | to->sb_qflags = cpu_to_be16(from->sb_qflags); | |
472 | to->sb_gquotino = cpu_to_be64(from->sb_gquotino); | |
473 | to->sb_pquotino = cpu_to_be64(from->sb_pquotino); | |
474 | return; | |
475 | } | |
476 | ||
ff55068c | 477 | /* |
4d11a402 DC |
478 | * The in-core version of sb_qflags do not have XFS_OQUOTA_* |
479 | * flags, whereas the on-disk version does. So, convert incore | |
480 | * XFS_{PG}QUOTA_* flags to on-disk XFS_OQUOTA_* flags. | |
ff55068c | 481 | */ |
4d11a402 DC |
482 | qflags &= ~(XFS_PQUOTA_ENFD | XFS_PQUOTA_CHKD | |
483 | XFS_GQUOTA_ENFD | XFS_GQUOTA_CHKD); | |
ff55068c | 484 | |
4d11a402 DC |
485 | if (from->sb_qflags & |
486 | (XFS_PQUOTA_ENFD | XFS_GQUOTA_ENFD)) | |
487 | qflags |= XFS_OQUOTA_ENFD; | |
488 | if (from->sb_qflags & | |
489 | (XFS_PQUOTA_CHKD | XFS_GQUOTA_CHKD)) | |
490 | qflags |= XFS_OQUOTA_CHKD; | |
491 | to->sb_qflags = cpu_to_be16(qflags); | |
ff55068c DC |
492 | |
493 | /* | |
4d11a402 DC |
494 | * GQUOTINO and PQUOTINO cannot be used together in versions |
495 | * of superblock that do not have pquotino. from->sb_flags | |
496 | * tells us which quota is active and should be copied to | |
497 | * disk. If neither are active, we should NULL the inode. | |
03e01349 | 498 | * |
4d11a402 DC |
499 | * In all cases, the separate pquotino must remain 0 because it |
500 | * it beyond the "end" of the valid non-pquotino superblock. | |
ff55068c | 501 | */ |
4d11a402 | 502 | if (from->sb_qflags & XFS_GQUOTA_ACCT) |
ff55068c | 503 | to->sb_gquotino = cpu_to_be64(from->sb_gquotino); |
4d11a402 | 504 | else if (from->sb_qflags & XFS_PQUOTA_ACCT) |
ff55068c | 505 | to->sb_gquotino = cpu_to_be64(from->sb_pquotino); |
03e01349 DC |
506 | else { |
507 | /* | |
508 | * We can't rely on just the fields being logged to tell us | |
509 | * that it is safe to write NULLFSINO - we should only do that | |
510 | * if quotas are not actually enabled. Hence only write | |
511 | * NULLFSINO if both in-core quota inodes are NULL. | |
512 | */ | |
513 | if (from->sb_gquotino == NULLFSINO && | |
514 | from->sb_pquotino == NULLFSINO) | |
515 | to->sb_gquotino = cpu_to_be64(NULLFSINO); | |
516 | } | |
ff55068c | 517 | |
4d11a402 | 518 | to->sb_pquotino = 0; |
ff55068c DC |
519 | } |
520 | ||
ff55068c DC |
521 | void |
522 | xfs_sb_to_disk( | |
4d11a402 DC |
523 | struct xfs_dsb *to, |
524 | struct xfs_sb *from) | |
ff55068c | 525 | { |
4d11a402 DC |
526 | xfs_sb_quota_to_disk(to, from); |
527 | ||
528 | to->sb_magicnum = cpu_to_be32(from->sb_magicnum); | |
529 | to->sb_blocksize = cpu_to_be32(from->sb_blocksize); | |
530 | to->sb_dblocks = cpu_to_be64(from->sb_dblocks); | |
531 | to->sb_rblocks = cpu_to_be64(from->sb_rblocks); | |
532 | to->sb_rextents = cpu_to_be64(from->sb_rextents); | |
533 | memcpy(&to->sb_uuid, &from->sb_uuid, sizeof(to->sb_uuid)); | |
534 | to->sb_logstart = cpu_to_be64(from->sb_logstart); | |
535 | to->sb_rootino = cpu_to_be64(from->sb_rootino); | |
536 | to->sb_rbmino = cpu_to_be64(from->sb_rbmino); | |
537 | to->sb_rsumino = cpu_to_be64(from->sb_rsumino); | |
538 | to->sb_rextsize = cpu_to_be32(from->sb_rextsize); | |
539 | to->sb_agblocks = cpu_to_be32(from->sb_agblocks); | |
540 | to->sb_agcount = cpu_to_be32(from->sb_agcount); | |
541 | to->sb_rbmblocks = cpu_to_be32(from->sb_rbmblocks); | |
542 | to->sb_logblocks = cpu_to_be32(from->sb_logblocks); | |
543 | to->sb_versionnum = cpu_to_be16(from->sb_versionnum); | |
544 | to->sb_sectsize = cpu_to_be16(from->sb_sectsize); | |
545 | to->sb_inodesize = cpu_to_be16(from->sb_inodesize); | |
546 | to->sb_inopblock = cpu_to_be16(from->sb_inopblock); | |
547 | memcpy(&to->sb_fname, &from->sb_fname, sizeof(to->sb_fname)); | |
548 | to->sb_blocklog = from->sb_blocklog; | |
549 | to->sb_sectlog = from->sb_sectlog; | |
550 | to->sb_inodelog = from->sb_inodelog; | |
551 | to->sb_inopblog = from->sb_inopblog; | |
552 | to->sb_agblklog = from->sb_agblklog; | |
553 | to->sb_rextslog = from->sb_rextslog; | |
554 | to->sb_inprogress = from->sb_inprogress; | |
555 | to->sb_imax_pct = from->sb_imax_pct; | |
556 | to->sb_icount = cpu_to_be64(from->sb_icount); | |
557 | to->sb_ifree = cpu_to_be64(from->sb_ifree); | |
558 | to->sb_fdblocks = cpu_to_be64(from->sb_fdblocks); | |
559 | to->sb_frextents = cpu_to_be64(from->sb_frextents); | |
ff55068c | 560 | |
4d11a402 DC |
561 | to->sb_flags = from->sb_flags; |
562 | to->sb_shared_vn = from->sb_shared_vn; | |
563 | to->sb_inoalignmt = cpu_to_be32(from->sb_inoalignmt); | |
564 | to->sb_unit = cpu_to_be32(from->sb_unit); | |
565 | to->sb_width = cpu_to_be32(from->sb_width); | |
566 | to->sb_dirblklog = from->sb_dirblklog; | |
567 | to->sb_logsectlog = from->sb_logsectlog; | |
568 | to->sb_logsectsize = cpu_to_be16(from->sb_logsectsize); | |
569 | to->sb_logsunit = cpu_to_be32(from->sb_logsunit); | |
074e427b DC |
570 | |
571 | /* | |
572 | * We need to ensure that bad_features2 always matches features2. | |
573 | * Hence we enforce that here rather than having to remember to do it | |
574 | * everywhere else that updates features2. | |
575 | */ | |
576 | from->sb_bad_features2 = from->sb_features2; | |
4d11a402 DC |
577 | to->sb_features2 = cpu_to_be32(from->sb_features2); |
578 | to->sb_bad_features2 = cpu_to_be32(from->sb_bad_features2); | |
579 | ||
580 | if (xfs_sb_version_hascrc(from)) { | |
581 | to->sb_features_compat = cpu_to_be32(from->sb_features_compat); | |
582 | to->sb_features_ro_compat = | |
583 | cpu_to_be32(from->sb_features_ro_compat); | |
584 | to->sb_features_incompat = | |
585 | cpu_to_be32(from->sb_features_incompat); | |
586 | to->sb_features_log_incompat = | |
587 | cpu_to_be32(from->sb_features_log_incompat); | |
fb4f2b4e | 588 | to->sb_spino_align = cpu_to_be32(from->sb_spino_align); |
4d11a402 | 589 | to->sb_lsn = cpu_to_be64(from->sb_lsn); |
ce748eaa ES |
590 | if (xfs_sb_version_hasmetauuid(from)) |
591 | uuid_copy(&to->sb_meta_uuid, &from->sb_meta_uuid); | |
ff55068c DC |
592 | } |
593 | } | |
594 | ||
595 | static int | |
596 | xfs_sb_verify( | |
597 | struct xfs_buf *bp, | |
598 | bool check_version) | |
599 | { | |
600 | struct xfs_mount *mp = bp->b_target->bt_mount; | |
601 | struct xfs_sb sb; | |
602 | ||
5ef828c4 ES |
603 | /* |
604 | * Use call variant which doesn't convert quota flags from disk | |
605 | * format, because xfs_mount_validate_sb checks the on-disk flags. | |
606 | */ | |
607 | __xfs_sb_from_disk(&sb, XFS_BUF_TO_SBP(bp), false); | |
ff55068c DC |
608 | |
609 | /* | |
610 | * Only check the in progress field for the primary superblock as | |
611 | * mkfs.xfs doesn't clear it from secondary superblocks. | |
612 | */ | |
f3d7ebde DC |
613 | return xfs_mount_validate_sb(mp, &sb, |
614 | bp->b_maps[0].bm_bn == XFS_SB_DADDR, | |
ff55068c DC |
615 | check_version); |
616 | } | |
617 | ||
618 | /* | |
619 | * If the superblock has the CRC feature bit set or the CRC field is non-null, | |
620 | * check that the CRC is valid. We check the CRC field is non-null because a | |
621 | * single bit error could clear the feature bit and unused parts of the | |
622 | * superblock are supposed to be zero. Hence a non-null crc field indicates that | |
623 | * we've potentially lost a feature bit and we should check it anyway. | |
10e6e65d ES |
624 | * |
625 | * However, past bugs (i.e. in growfs) left non-zeroed regions beyond the | |
626 | * last field in V4 secondary superblocks. So for secondary superblocks, | |
627 | * we are more forgiving, and ignore CRC failures if the primary doesn't | |
628 | * indicate that the fs version is V5. | |
ff55068c DC |
629 | */ |
630 | static void | |
631 | xfs_sb_read_verify( | |
632 | struct xfs_buf *bp) | |
633 | { | |
634 | struct xfs_mount *mp = bp->b_target->bt_mount; | |
635 | struct xfs_dsb *dsb = XFS_BUF_TO_SBP(bp); | |
636 | int error; | |
637 | ||
638 | /* | |
639 | * open code the version check to avoid needing to convert the entire | |
640 | * superblock from disk order just to check the version number | |
641 | */ | |
642 | if (dsb->sb_magicnum == cpu_to_be32(XFS_SB_MAGIC) && | |
643 | (((be16_to_cpu(dsb->sb_versionnum) & XFS_SB_VERSION_NUMBITS) == | |
644 | XFS_SB_VERSION_5) || | |
645 | dsb->sb_crc != 0)) { | |
646 | ||
51582170 | 647 | if (!xfs_buf_verify_cksum(bp, XFS_SB_CRC_OFF)) { |
10e6e65d | 648 | /* Only fail bad secondaries on a known V5 filesystem */ |
7a01e707 | 649 | if (bp->b_bn == XFS_SB_DADDR || |
10e6e65d | 650 | xfs_sb_version_hascrc(&mp->m_sb)) { |
2451337d | 651 | error = -EFSBADCRC; |
10e6e65d ES |
652 | goto out_error; |
653 | } | |
ff55068c DC |
654 | } |
655 | } | |
656 | error = xfs_sb_verify(bp, true); | |
657 | ||
658 | out_error: | |
31ca03c9 | 659 | if (error == -EFSCORRUPTED || error == -EFSBADCRC) |
bc1a09b8 | 660 | xfs_verifier_error(bp, error, __this_address); |
31ca03c9 | 661 | else if (error) |
ff55068c | 662 | xfs_buf_ioerror(bp, error); |
ff55068c DC |
663 | } |
664 | ||
665 | /* | |
666 | * We may be probed for a filesystem match, so we may not want to emit | |
667 | * messages when the superblock buffer is not actually an XFS superblock. | |
2533787a | 668 | * If we find an XFS superblock, then run a normal, noisy mount because we are |
ff55068c DC |
669 | * really going to mount it and want to know about errors. |
670 | */ | |
671 | static void | |
672 | xfs_sb_quiet_read_verify( | |
673 | struct xfs_buf *bp) | |
674 | { | |
675 | struct xfs_dsb *dsb = XFS_BUF_TO_SBP(bp); | |
676 | ||
ff55068c DC |
677 | if (dsb->sb_magicnum == cpu_to_be32(XFS_SB_MAGIC)) { |
678 | /* XFS filesystem, verify noisily! */ | |
679 | xfs_sb_read_verify(bp); | |
680 | return; | |
681 | } | |
682 | /* quietly fail */ | |
2451337d | 683 | xfs_buf_ioerror(bp, -EWRONGFS); |
ff55068c DC |
684 | } |
685 | ||
686 | static void | |
687 | xfs_sb_write_verify( | |
688 | struct xfs_buf *bp) | |
689 | { | |
690 | struct xfs_mount *mp = bp->b_target->bt_mount; | |
fb1755a6 | 691 | struct xfs_buf_log_item *bip = bp->b_log_item; |
ff55068c DC |
692 | int error; |
693 | ||
694 | error = xfs_sb_verify(bp, false); | |
695 | if (error) { | |
bc1a09b8 | 696 | xfs_verifier_error(bp, error, __this_address); |
ff55068c DC |
697 | return; |
698 | } | |
699 | ||
700 | if (!xfs_sb_version_hascrc(&mp->m_sb)) | |
701 | return; | |
702 | ||
703 | if (bip) | |
704 | XFS_BUF_TO_SBP(bp)->sb_lsn = cpu_to_be64(bip->bli_item.li_lsn); | |
705 | ||
f1dbcd7e | 706 | xfs_buf_update_cksum(bp, XFS_SB_CRC_OFF); |
ff55068c DC |
707 | } |
708 | ||
709 | const struct xfs_buf_ops xfs_sb_buf_ops = { | |
233135b7 | 710 | .name = "xfs_sb", |
ff55068c DC |
711 | .verify_read = xfs_sb_read_verify, |
712 | .verify_write = xfs_sb_write_verify, | |
713 | }; | |
714 | ||
715 | const struct xfs_buf_ops xfs_sb_quiet_buf_ops = { | |
233135b7 | 716 | .name = "xfs_sb_quiet", |
ff55068c DC |
717 | .verify_read = xfs_sb_quiet_read_verify, |
718 | .verify_write = xfs_sb_write_verify, | |
719 | }; | |
720 | ||
721 | /* | |
722 | * xfs_mount_common | |
723 | * | |
724 | * Mount initialization code establishing various mount | |
725 | * fields from the superblock associated with the given | |
726 | * mount structure | |
727 | */ | |
728 | void | |
729 | xfs_sb_mount_common( | |
730 | struct xfs_mount *mp, | |
731 | struct xfs_sb *sbp) | |
732 | { | |
733 | mp->m_agfrotor = mp->m_agirotor = 0; | |
ff55068c DC |
734 | mp->m_maxagi = mp->m_sb.sb_agcount; |
735 | mp->m_blkbit_log = sbp->sb_blocklog + XFS_NBBYLOG; | |
736 | mp->m_blkbb_log = sbp->sb_blocklog - BBSHIFT; | |
737 | mp->m_sectbb_log = sbp->sb_sectlog - BBSHIFT; | |
738 | mp->m_agno_log = xfs_highbit32(sbp->sb_agcount - 1) + 1; | |
739 | mp->m_agino_log = sbp->sb_inopblog + sbp->sb_agblklog; | |
740 | mp->m_blockmask = sbp->sb_blocksize - 1; | |
741 | mp->m_blockwsize = sbp->sb_blocksize >> XFS_WORDLOG; | |
742 | mp->m_blockwmask = mp->m_blockwsize - 1; | |
743 | ||
744 | mp->m_alloc_mxr[0] = xfs_allocbt_maxrecs(mp, sbp->sb_blocksize, 1); | |
745 | mp->m_alloc_mxr[1] = xfs_allocbt_maxrecs(mp, sbp->sb_blocksize, 0); | |
746 | mp->m_alloc_mnr[0] = mp->m_alloc_mxr[0] / 2; | |
747 | mp->m_alloc_mnr[1] = mp->m_alloc_mxr[1] / 2; | |
748 | ||
749 | mp->m_inobt_mxr[0] = xfs_inobt_maxrecs(mp, sbp->sb_blocksize, 1); | |
750 | mp->m_inobt_mxr[1] = xfs_inobt_maxrecs(mp, sbp->sb_blocksize, 0); | |
751 | mp->m_inobt_mnr[0] = mp->m_inobt_mxr[0] / 2; | |
752 | mp->m_inobt_mnr[1] = mp->m_inobt_mxr[1] / 2; | |
753 | ||
754 | mp->m_bmap_dmxr[0] = xfs_bmbt_maxrecs(mp, sbp->sb_blocksize, 1); | |
755 | mp->m_bmap_dmxr[1] = xfs_bmbt_maxrecs(mp, sbp->sb_blocksize, 0); | |
756 | mp->m_bmap_dmnr[0] = mp->m_bmap_dmxr[0] / 2; | |
757 | mp->m_bmap_dmnr[1] = mp->m_bmap_dmxr[1] / 2; | |
758 | ||
a1f69417 ES |
759 | mp->m_rmap_mxr[0] = xfs_rmapbt_maxrecs(sbp->sb_blocksize, 1); |
760 | mp->m_rmap_mxr[1] = xfs_rmapbt_maxrecs(sbp->sb_blocksize, 0); | |
035e00ac DW |
761 | mp->m_rmap_mnr[0] = mp->m_rmap_mxr[0] / 2; |
762 | mp->m_rmap_mnr[1] = mp->m_rmap_mxr[1] / 2; | |
763 | ||
a1f69417 ES |
764 | mp->m_refc_mxr[0] = xfs_refcountbt_maxrecs(sbp->sb_blocksize, true); |
765 | mp->m_refc_mxr[1] = xfs_refcountbt_maxrecs(sbp->sb_blocksize, false); | |
1946b91c DW |
766 | mp->m_refc_mnr[0] = mp->m_refc_mxr[0] / 2; |
767 | mp->m_refc_mnr[1] = mp->m_refc_mxr[1] / 2; | |
768 | ||
ff55068c | 769 | mp->m_bsize = XFS_FSB_TO_BB(mp, 1); |
c8ce540d | 770 | mp->m_ialloc_inos = (int)MAX((uint16_t)XFS_INODES_PER_CHUNK, |
ff55068c DC |
771 | sbp->sb_inopblock); |
772 | mp->m_ialloc_blks = mp->m_ialloc_inos >> sbp->sb_inopblog; | |
066a1884 BF |
773 | |
774 | if (sbp->sb_spino_align) | |
775 | mp->m_ialloc_min_blks = sbp->sb_spino_align; | |
776 | else | |
777 | mp->m_ialloc_min_blks = mp->m_ialloc_blks; | |
52548852 DW |
778 | mp->m_alloc_set_aside = xfs_alloc_set_aside(mp); |
779 | mp->m_ag_max_usable = xfs_alloc_ag_max_usable(mp); | |
ff55068c DC |
780 | } |
781 | ||
782 | /* | |
783 | * xfs_initialize_perag_data | |
784 | * | |
785 | * Read in each per-ag structure so we can count up the number of | |
786 | * allocated inodes, free inodes and used filesystem blocks as this | |
787 | * information is no longer persistent in the superblock. Once we have | |
788 | * this information, write it into the in-core superblock structure. | |
789 | */ | |
790 | int | |
791 | xfs_initialize_perag_data( | |
792 | struct xfs_mount *mp, | |
793 | xfs_agnumber_t agcount) | |
794 | { | |
795 | xfs_agnumber_t index; | |
796 | xfs_perag_t *pag; | |
797 | xfs_sb_t *sbp = &mp->m_sb; | |
798 | uint64_t ifree = 0; | |
799 | uint64_t ialloc = 0; | |
800 | uint64_t bfree = 0; | |
801 | uint64_t bfreelst = 0; | |
802 | uint64_t btree = 0; | |
803 | int error; | |
804 | ||
805 | for (index = 0; index < agcount; index++) { | |
806 | /* | |
807 | * read the agf, then the agi. This gets us | |
808 | * all the information we need and populates the | |
809 | * per-ag structures for us. | |
810 | */ | |
811 | error = xfs_alloc_pagf_init(mp, NULL, index, 0); | |
812 | if (error) | |
813 | return error; | |
814 | ||
815 | error = xfs_ialloc_pagi_init(mp, NULL, index); | |
816 | if (error) | |
817 | return error; | |
818 | pag = xfs_perag_get(mp, index); | |
819 | ifree += pag->pagi_freecount; | |
820 | ialloc += pag->pagi_count; | |
821 | bfree += pag->pagf_freeblks; | |
822 | bfreelst += pag->pagf_flcount; | |
823 | btree += pag->pagf_btreeblks; | |
824 | xfs_perag_put(pag); | |
825 | } | |
5681ca40 DC |
826 | |
827 | /* Overwrite incore superblock counters with just-read data */ | |
ff55068c DC |
828 | spin_lock(&mp->m_sb_lock); |
829 | sbp->sb_ifree = ifree; | |
830 | sbp->sb_icount = ialloc; | |
831 | sbp->sb_fdblocks = bfree + bfreelst + btree; | |
832 | spin_unlock(&mp->m_sb_lock); | |
833 | ||
5681ca40 | 834 | xfs_reinit_percpu_counters(mp); |
ff55068c DC |
835 | |
836 | return 0; | |
837 | } | |
838 | ||
839 | /* | |
61e63ecb DC |
840 | * xfs_log_sb() can be used to copy arbitrary changes to the in-core superblock |
841 | * into the superblock buffer to be logged. It does not provide the higher | |
842 | * level of locking that is needed to protect the in-core superblock from | |
843 | * concurrent access. | |
ff55068c DC |
844 | */ |
845 | void | |
61e63ecb | 846 | xfs_log_sb( |
4d11a402 | 847 | struct xfs_trans *tp) |
ff55068c | 848 | { |
4d11a402 DC |
849 | struct xfs_mount *mp = tp->t_mountp; |
850 | struct xfs_buf *bp = xfs_trans_getsb(tp, mp, 0); | |
ff55068c | 851 | |
501ab323 | 852 | mp->m_sb.sb_icount = percpu_counter_sum(&mp->m_icount); |
e88b64ea | 853 | mp->m_sb.sb_ifree = percpu_counter_sum(&mp->m_ifree); |
0d485ada | 854 | mp->m_sb.sb_fdblocks = percpu_counter_sum(&mp->m_fdblocks); |
501ab323 | 855 | |
4d11a402 | 856 | xfs_sb_to_disk(XFS_BUF_TO_SBP(bp), &mp->m_sb); |
ff55068c | 857 | xfs_trans_buf_set_type(tp, bp, XFS_BLFT_SB_BUF); |
4d11a402 | 858 | xfs_trans_log_buf(tp, bp, 0, sizeof(struct xfs_dsb)); |
ff55068c | 859 | } |
61e63ecb DC |
860 | |
861 | /* | |
862 | * xfs_sync_sb | |
863 | * | |
864 | * Sync the superblock to disk. | |
865 | * | |
866 | * Note that the caller is responsible for checking the frozen state of the | |
867 | * filesystem. This procedure uses the non-blocking transaction allocator and | |
868 | * thus will allow modifications to a frozen fs. This is required because this | |
869 | * code can be called during the process of freezing where use of the high-level | |
870 | * allocator would deadlock. | |
871 | */ | |
872 | int | |
873 | xfs_sync_sb( | |
874 | struct xfs_mount *mp, | |
875 | bool wait) | |
876 | { | |
877 | struct xfs_trans *tp; | |
878 | int error; | |
879 | ||
253f4911 CH |
880 | error = xfs_trans_alloc(mp, &M_RES(mp)->tr_sb, 0, 0, |
881 | XFS_TRANS_NO_WRITECOUNT, &tp); | |
882 | if (error) | |
61e63ecb | 883 | return error; |
61e63ecb DC |
884 | |
885 | xfs_log_sb(tp); | |
886 | if (wait) | |
887 | xfs_trans_set_sync(tp); | |
70393313 | 888 | return xfs_trans_commit(tp); |
61e63ecb | 889 | } |
c368ebcd | 890 | |
b16817b6 DC |
891 | /* |
892 | * Update all the secondary superblocks to match the new state of the primary. | |
893 | * Because we are completely overwriting all the existing fields in the | |
894 | * secondary superblock buffers, there is no need to read them in from disk. | |
895 | * Just get a new buffer, stamp it and write it. | |
896 | * | |
897 | * The sb buffers need to be cached here so that we serialise against other | |
898 | * operations that access the secondary superblocks, but we don't want to keep | |
899 | * them in memory once it is written so we mark it as a one-shot buffer. | |
900 | */ | |
901 | int | |
902 | xfs_update_secondary_sbs( | |
903 | struct xfs_mount *mp) | |
904 | { | |
905 | xfs_agnumber_t agno; | |
906 | int saved_error = 0; | |
907 | int error = 0; | |
908 | LIST_HEAD (buffer_list); | |
909 | ||
910 | /* update secondary superblocks. */ | |
911 | for (agno = 1; agno < mp->m_sb.sb_agcount; agno++) { | |
912 | struct xfs_buf *bp; | |
913 | ||
914 | bp = xfs_buf_get(mp->m_ddev_targp, | |
915 | XFS_AG_DADDR(mp, agno, XFS_SB_DADDR), | |
916 | XFS_FSS_TO_BB(mp, 1), 0); | |
917 | /* | |
918 | * If we get an error reading or writing alternate superblocks, | |
919 | * continue. xfs_repair chooses the "best" superblock based | |
920 | * on most matches; if we break early, we'll leave more | |
921 | * superblocks un-updated than updated, and xfs_repair may | |
922 | * pick them over the properly-updated primary. | |
923 | */ | |
924 | if (!bp) { | |
925 | xfs_warn(mp, | |
926 | "error allocating secondary superblock for ag %d", | |
927 | agno); | |
928 | if (!saved_error) | |
929 | saved_error = -ENOMEM; | |
930 | continue; | |
931 | } | |
932 | ||
933 | bp->b_ops = &xfs_sb_buf_ops; | |
934 | xfs_buf_oneshot(bp); | |
935 | xfs_buf_zero(bp, 0, BBTOB(bp->b_length)); | |
936 | xfs_sb_to_disk(XFS_BUF_TO_SBP(bp), &mp->m_sb); | |
937 | xfs_buf_delwri_queue(bp, &buffer_list); | |
938 | xfs_buf_relse(bp); | |
939 | ||
940 | /* don't hold too many buffers at once */ | |
941 | if (agno % 16) | |
942 | continue; | |
943 | ||
944 | error = xfs_buf_delwri_submit(&buffer_list); | |
945 | if (error) { | |
946 | xfs_warn(mp, | |
947 | "write error %d updating a secondary superblock near ag %d", | |
948 | error, agno); | |
949 | if (!saved_error) | |
950 | saved_error = error; | |
951 | continue; | |
952 | } | |
953 | } | |
954 | error = xfs_buf_delwri_submit(&buffer_list); | |
955 | if (error) { | |
956 | xfs_warn(mp, | |
957 | "write error %d updating a secondary superblock near ag %d", | |
958 | error, agno); | |
959 | } | |
960 | ||
961 | return saved_error ? saved_error : error; | |
962 | } | |
963 | ||
c368ebcd DW |
964 | int |
965 | xfs_fs_geometry( | |
ac503a4c DW |
966 | struct xfs_sb *sbp, |
967 | struct xfs_fsop_geom *geo, | |
968 | int struct_version) | |
c368ebcd | 969 | { |
ac503a4c DW |
970 | memset(geo, 0, sizeof(struct xfs_fsop_geom)); |
971 | ||
972 | geo->blocksize = sbp->sb_blocksize; | |
973 | geo->rtextsize = sbp->sb_rextsize; | |
974 | geo->agblocks = sbp->sb_agblocks; | |
975 | geo->agcount = sbp->sb_agcount; | |
976 | geo->logblocks = sbp->sb_logblocks; | |
977 | geo->sectsize = sbp->sb_sectsize; | |
978 | geo->inodesize = sbp->sb_inodesize; | |
979 | geo->imaxpct = sbp->sb_imax_pct; | |
980 | geo->datablocks = sbp->sb_dblocks; | |
981 | geo->rtblocks = sbp->sb_rblocks; | |
982 | geo->rtextents = sbp->sb_rextents; | |
983 | geo->logstart = sbp->sb_logstart; | |
984 | BUILD_BUG_ON(sizeof(geo->uuid) != sizeof(sbp->sb_uuid)); | |
985 | memcpy(geo->uuid, &sbp->sb_uuid, sizeof(sbp->sb_uuid)); | |
986 | ||
987 | if (struct_version < 2) | |
988 | return 0; | |
989 | ||
990 | geo->sunit = sbp->sb_unit; | |
991 | geo->swidth = sbp->sb_width; | |
992 | ||
993 | if (struct_version < 3) | |
994 | return 0; | |
995 | ||
996 | geo->version = XFS_FSOP_GEOM_VERSION; | |
997 | geo->flags = XFS_FSOP_GEOM_FLAGS_NLINK | | |
998 | XFS_FSOP_GEOM_FLAGS_DIRV2; | |
999 | if (xfs_sb_version_hasattr(sbp)) | |
1000 | geo->flags |= XFS_FSOP_GEOM_FLAGS_ATTR; | |
1001 | if (xfs_sb_version_hasquota(sbp)) | |
1002 | geo->flags |= XFS_FSOP_GEOM_FLAGS_QUOTA; | |
1003 | if (xfs_sb_version_hasalign(sbp)) | |
1004 | geo->flags |= XFS_FSOP_GEOM_FLAGS_IALIGN; | |
1005 | if (xfs_sb_version_hasdalign(sbp)) | |
1006 | geo->flags |= XFS_FSOP_GEOM_FLAGS_DALIGN; | |
1007 | if (xfs_sb_version_hasextflgbit(sbp)) | |
1008 | geo->flags |= XFS_FSOP_GEOM_FLAGS_EXTFLG; | |
1009 | if (xfs_sb_version_hassector(sbp)) | |
1010 | geo->flags |= XFS_FSOP_GEOM_FLAGS_SECTOR; | |
1011 | if (xfs_sb_version_hasasciici(sbp)) | |
1012 | geo->flags |= XFS_FSOP_GEOM_FLAGS_DIRV2CI; | |
1013 | if (xfs_sb_version_haslazysbcount(sbp)) | |
1014 | geo->flags |= XFS_FSOP_GEOM_FLAGS_LAZYSB; | |
1015 | if (xfs_sb_version_hasattr2(sbp)) | |
1016 | geo->flags |= XFS_FSOP_GEOM_FLAGS_ATTR2; | |
1017 | if (xfs_sb_version_hasprojid32bit(sbp)) | |
1018 | geo->flags |= XFS_FSOP_GEOM_FLAGS_PROJID32; | |
1019 | if (xfs_sb_version_hascrc(sbp)) | |
1020 | geo->flags |= XFS_FSOP_GEOM_FLAGS_V5SB; | |
1021 | if (xfs_sb_version_hasftype(sbp)) | |
1022 | geo->flags |= XFS_FSOP_GEOM_FLAGS_FTYPE; | |
1023 | if (xfs_sb_version_hasfinobt(sbp)) | |
1024 | geo->flags |= XFS_FSOP_GEOM_FLAGS_FINOBT; | |
1025 | if (xfs_sb_version_hassparseinodes(sbp)) | |
1026 | geo->flags |= XFS_FSOP_GEOM_FLAGS_SPINODES; | |
1027 | if (xfs_sb_version_hasrmapbt(sbp)) | |
1028 | geo->flags |= XFS_FSOP_GEOM_FLAGS_RMAPBT; | |
1029 | if (xfs_sb_version_hasreflink(sbp)) | |
1030 | geo->flags |= XFS_FSOP_GEOM_FLAGS_REFLINK; | |
1031 | if (xfs_sb_version_hassector(sbp)) | |
1032 | geo->logsectsize = sbp->sb_logsectsize; | |
1033 | else | |
1034 | geo->logsectsize = BBSIZE; | |
1035 | geo->rtsectsize = sbp->sb_blocksize; | |
1036 | geo->dirblocksize = xfs_dir2_dirblock_bytes(sbp); | |
1037 | ||
a8789a5a | 1038 | if (struct_version < 4) |
ac503a4c DW |
1039 | return 0; |
1040 | ||
1041 | if (xfs_sb_version_haslogv2(sbp)) | |
1042 | geo->flags |= XFS_FSOP_GEOM_FLAGS_LOGV2; | |
1043 | ||
1044 | geo->logsunit = sbp->sb_logsunit; | |
c368ebcd | 1045 | |
c368ebcd DW |
1046 | return 0; |
1047 | } | |
689e11c8 DW |
1048 | |
1049 | /* Read a secondary superblock. */ | |
1050 | int | |
1051 | xfs_sb_read_secondary( | |
1052 | struct xfs_mount *mp, | |
1053 | struct xfs_trans *tp, | |
1054 | xfs_agnumber_t agno, | |
1055 | struct xfs_buf **bpp) | |
1056 | { | |
1057 | struct xfs_buf *bp; | |
1058 | int error; | |
1059 | ||
1060 | ASSERT(agno != 0 && agno != NULLAGNUMBER); | |
1061 | error = xfs_trans_read_buf(mp, tp, mp->m_ddev_targp, | |
1062 | XFS_AG_DADDR(mp, agno, XFS_SB_BLOCK(mp)), | |
1063 | XFS_FSS_TO_BB(mp, 1), 0, &bp, &xfs_sb_buf_ops); | |
1064 | if (error) | |
1065 | return error; | |
1066 | xfs_buf_set_ref(bp, XFS_SSB_REF); | |
1067 | *bpp = bp; | |
1068 | return 0; | |
1069 | } |