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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" |
ff55068c | 27 | #include "xfs_inode.h" |
ff55068c DC |
28 | #include "xfs_ialloc.h" |
29 | #include "xfs_alloc.h" | |
ff55068c | 30 | #include "xfs_error.h" |
ff55068c DC |
31 | #include "xfs_trace.h" |
32 | #include "xfs_cksum.h" | |
239880ef | 33 | #include "xfs_trans.h" |
ff55068c | 34 | #include "xfs_buf_item.h" |
a4fbe6ab DC |
35 | #include "xfs_bmap_btree.h" |
36 | #include "xfs_alloc_btree.h" | |
37 | #include "xfs_ialloc_btree.h" | |
ff55068c DC |
38 | |
39 | /* | |
40 | * Physical superblock buffer manipulations. Shared with libxfs in userspace. | |
41 | */ | |
42 | ||
ff55068c DC |
43 | /* |
44 | * Reference counting access wrappers to the perag structures. | |
45 | * Because we never free per-ag structures, the only thing we | |
46 | * have to protect against changes is the tree structure itself. | |
47 | */ | |
48 | struct xfs_perag * | |
49 | xfs_perag_get( | |
50 | struct xfs_mount *mp, | |
51 | xfs_agnumber_t agno) | |
52 | { | |
53 | struct xfs_perag *pag; | |
54 | int ref = 0; | |
55 | ||
56 | rcu_read_lock(); | |
57 | pag = radix_tree_lookup(&mp->m_perag_tree, agno); | |
58 | if (pag) { | |
59 | ASSERT(atomic_read(&pag->pag_ref) >= 0); | |
60 | ref = atomic_inc_return(&pag->pag_ref); | |
61 | } | |
62 | rcu_read_unlock(); | |
63 | trace_xfs_perag_get(mp, agno, ref, _RET_IP_); | |
64 | return pag; | |
65 | } | |
66 | ||
67 | /* | |
68 | * search from @first to find the next perag with the given tag set. | |
69 | */ | |
70 | struct xfs_perag * | |
71 | xfs_perag_get_tag( | |
72 | struct xfs_mount *mp, | |
73 | xfs_agnumber_t first, | |
74 | int tag) | |
75 | { | |
76 | struct xfs_perag *pag; | |
77 | int found; | |
78 | int ref; | |
79 | ||
80 | rcu_read_lock(); | |
81 | found = radix_tree_gang_lookup_tag(&mp->m_perag_tree, | |
82 | (void **)&pag, first, 1, tag); | |
83 | if (found <= 0) { | |
84 | rcu_read_unlock(); | |
85 | return NULL; | |
86 | } | |
87 | ref = atomic_inc_return(&pag->pag_ref); | |
88 | rcu_read_unlock(); | |
89 | trace_xfs_perag_get_tag(mp, pag->pag_agno, ref, _RET_IP_); | |
90 | return pag; | |
91 | } | |
92 | ||
93 | void | |
94 | xfs_perag_put( | |
95 | struct xfs_perag *pag) | |
96 | { | |
97 | int ref; | |
98 | ||
99 | ASSERT(atomic_read(&pag->pag_ref) > 0); | |
100 | ref = atomic_dec_return(&pag->pag_ref); | |
101 | trace_xfs_perag_put(pag->pag_mount, pag->pag_agno, ref, _RET_IP_); | |
102 | } | |
103 | ||
104 | /* | |
105 | * Check the validity of the SB found. | |
106 | */ | |
107 | STATIC int | |
108 | xfs_mount_validate_sb( | |
109 | xfs_mount_t *mp, | |
110 | xfs_sb_t *sbp, | |
111 | bool check_inprogress, | |
112 | bool check_version) | |
113 | { | |
ff55068c DC |
114 | if (sbp->sb_magicnum != XFS_SB_MAGIC) { |
115 | xfs_warn(mp, "bad magic number"); | |
2451337d | 116 | return -EWRONGFS; |
ff55068c DC |
117 | } |
118 | ||
119 | ||
120 | if (!xfs_sb_good_version(sbp)) { | |
121 | xfs_warn(mp, "bad version"); | |
2451337d | 122 | return -EWRONGFS; |
ff55068c DC |
123 | } |
124 | ||
125 | /* | |
126 | * Version 5 superblock feature mask validation. Reject combinations the | |
127 | * kernel cannot support up front before checking anything else. For | |
128 | * write validation, we don't need to check feature masks. | |
129 | */ | |
130 | if (check_version && XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) { | |
ff55068c DC |
131 | if (xfs_sb_has_compat_feature(sbp, |
132 | XFS_SB_FEAT_COMPAT_UNKNOWN)) { | |
133 | xfs_warn(mp, | |
134 | "Superblock has unknown compatible features (0x%x) enabled.\n" | |
135 | "Using a more recent kernel is recommended.", | |
136 | (sbp->sb_features_compat & | |
137 | XFS_SB_FEAT_COMPAT_UNKNOWN)); | |
138 | } | |
139 | ||
140 | if (xfs_sb_has_ro_compat_feature(sbp, | |
141 | XFS_SB_FEAT_RO_COMPAT_UNKNOWN)) { | |
142 | xfs_alert(mp, | |
143 | "Superblock has unknown read-only compatible features (0x%x) enabled.", | |
144 | (sbp->sb_features_ro_compat & | |
145 | XFS_SB_FEAT_RO_COMPAT_UNKNOWN)); | |
146 | if (!(mp->m_flags & XFS_MOUNT_RDONLY)) { | |
147 | xfs_warn(mp, | |
148 | "Attempted to mount read-only compatible filesystem read-write.\n" | |
149 | "Filesystem can only be safely mounted read only."); | |
2451337d | 150 | return -EINVAL; |
ff55068c DC |
151 | } |
152 | } | |
153 | if (xfs_sb_has_incompat_feature(sbp, | |
154 | XFS_SB_FEAT_INCOMPAT_UNKNOWN)) { | |
155 | xfs_warn(mp, | |
156 | "Superblock has unknown incompatible features (0x%x) enabled.\n" | |
157 | "Filesystem can not be safely mounted by this kernel.", | |
158 | (sbp->sb_features_incompat & | |
159 | XFS_SB_FEAT_INCOMPAT_UNKNOWN)); | |
2451337d | 160 | return -EINVAL; |
ff55068c DC |
161 | } |
162 | } | |
163 | ||
164 | if (xfs_sb_version_has_pquotino(sbp)) { | |
165 | if (sbp->sb_qflags & (XFS_OQUOTA_ENFD | XFS_OQUOTA_CHKD)) { | |
166 | xfs_notice(mp, | |
08e96e1a | 167 | "Version 5 of Super block has XFS_OQUOTA bits."); |
2451337d | 168 | return -EFSCORRUPTED; |
ff55068c DC |
169 | } |
170 | } else if (sbp->sb_qflags & (XFS_PQUOTA_ENFD | XFS_GQUOTA_ENFD | | |
171 | XFS_PQUOTA_CHKD | XFS_GQUOTA_CHKD)) { | |
172 | xfs_notice(mp, | |
08e96e1a | 173 | "Superblock earlier than Version 5 has XFS_[PQ]UOTA_{ENFD|CHKD} bits."); |
2451337d | 174 | return -EFSCORRUPTED; |
ff55068c DC |
175 | } |
176 | ||
e5376fc1 BF |
177 | /* |
178 | * Full inode chunks must be aligned to inode chunk size when | |
179 | * sparse inodes are enabled to support the sparse chunk | |
180 | * allocation algorithm and prevent overlapping inode records. | |
181 | */ | |
182 | if (xfs_sb_version_hassparseinodes(sbp)) { | |
183 | uint32_t align; | |
184 | ||
185 | xfs_alert(mp, | |
186 | "EXPERIMENTAL sparse inode feature enabled. Use at your own risk!"); | |
187 | ||
188 | align = XFS_INODES_PER_CHUNK * sbp->sb_inodesize | |
189 | >> sbp->sb_blocklog; | |
190 | if (sbp->sb_inoalignmt != align) { | |
191 | xfs_warn(mp, | |
192 | "Inode block alignment (%u) must match chunk size (%u) for sparse inodes.", | |
193 | sbp->sb_inoalignmt, align); | |
194 | return -EINVAL; | |
195 | } | |
196 | } | |
197 | ||
ff55068c DC |
198 | if (unlikely( |
199 | sbp->sb_logstart == 0 && mp->m_logdev_targp == mp->m_ddev_targp)) { | |
200 | xfs_warn(mp, | |
201 | "filesystem is marked as having an external log; " | |
202 | "specify logdev on the mount command line."); | |
2451337d | 203 | return -EINVAL; |
ff55068c DC |
204 | } |
205 | ||
206 | if (unlikely( | |
207 | sbp->sb_logstart != 0 && mp->m_logdev_targp != mp->m_ddev_targp)) { | |
208 | xfs_warn(mp, | |
209 | "filesystem is marked as having an internal log; " | |
210 | "do not specify logdev on the mount command line."); | |
2451337d | 211 | return -EINVAL; |
ff55068c DC |
212 | } |
213 | ||
214 | /* | |
215 | * More sanity checking. Most of these were stolen directly from | |
216 | * xfs_repair. | |
217 | */ | |
218 | if (unlikely( | |
219 | sbp->sb_agcount <= 0 || | |
220 | sbp->sb_sectsize < XFS_MIN_SECTORSIZE || | |
221 | sbp->sb_sectsize > XFS_MAX_SECTORSIZE || | |
222 | sbp->sb_sectlog < XFS_MIN_SECTORSIZE_LOG || | |
223 | sbp->sb_sectlog > XFS_MAX_SECTORSIZE_LOG || | |
224 | sbp->sb_sectsize != (1 << sbp->sb_sectlog) || | |
225 | sbp->sb_blocksize < XFS_MIN_BLOCKSIZE || | |
226 | sbp->sb_blocksize > XFS_MAX_BLOCKSIZE || | |
227 | sbp->sb_blocklog < XFS_MIN_BLOCKSIZE_LOG || | |
228 | sbp->sb_blocklog > XFS_MAX_BLOCKSIZE_LOG || | |
229 | sbp->sb_blocksize != (1 << sbp->sb_blocklog) || | |
e1b05723 | 230 | sbp->sb_dirblklog > XFS_MAX_BLOCKSIZE_LOG || |
ff55068c DC |
231 | sbp->sb_inodesize < XFS_DINODE_MIN_SIZE || |
232 | sbp->sb_inodesize > XFS_DINODE_MAX_SIZE || | |
233 | sbp->sb_inodelog < XFS_DINODE_MIN_LOG || | |
234 | sbp->sb_inodelog > XFS_DINODE_MAX_LOG || | |
235 | sbp->sb_inodesize != (1 << sbp->sb_inodelog) || | |
e1b05723 | 236 | sbp->sb_logsunit > XLOG_MAX_RECORD_BSIZE || |
392c6de9 | 237 | sbp->sb_inopblock != howmany(sbp->sb_blocksize,sbp->sb_inodesize) || |
ff55068c DC |
238 | (sbp->sb_blocklog - sbp->sb_inodelog != sbp->sb_inopblog) || |
239 | (sbp->sb_rextsize * sbp->sb_blocksize > XFS_MAX_RTEXTSIZE) || | |
240 | (sbp->sb_rextsize * sbp->sb_blocksize < XFS_MIN_RTEXTSIZE) || | |
241 | (sbp->sb_imax_pct > 100 /* zero sb_imax_pct is valid */) || | |
242 | sbp->sb_dblocks == 0 || | |
243 | sbp->sb_dblocks > XFS_MAX_DBLOCKS(sbp) || | |
ab3e57b5 DC |
244 | sbp->sb_dblocks < XFS_MIN_DBLOCKS(sbp) || |
245 | sbp->sb_shared_vn != 0)) { | |
5ef11eb0 | 246 | xfs_notice(mp, "SB sanity check failed"); |
2451337d | 247 | return -EFSCORRUPTED; |
ff55068c DC |
248 | } |
249 | ||
250 | /* | |
251 | * Until this is fixed only page-sized or smaller data blocks work. | |
252 | */ | |
253 | if (unlikely(sbp->sb_blocksize > PAGE_SIZE)) { | |
254 | xfs_warn(mp, | |
255 | "File system with blocksize %d bytes. " | |
256 | "Only pagesize (%ld) or less will currently work.", | |
257 | sbp->sb_blocksize, PAGE_SIZE); | |
2451337d | 258 | return -ENOSYS; |
ff55068c DC |
259 | } |
260 | ||
261 | /* | |
262 | * Currently only very few inode sizes are supported. | |
263 | */ | |
264 | switch (sbp->sb_inodesize) { | |
265 | case 256: | |
266 | case 512: | |
267 | case 1024: | |
268 | case 2048: | |
269 | break; | |
270 | default: | |
271 | xfs_warn(mp, "inode size of %d bytes not supported", | |
272 | sbp->sb_inodesize); | |
2451337d | 273 | return -ENOSYS; |
ff55068c DC |
274 | } |
275 | ||
276 | if (xfs_sb_validate_fsb_count(sbp, sbp->sb_dblocks) || | |
277 | xfs_sb_validate_fsb_count(sbp, sbp->sb_rblocks)) { | |
278 | xfs_warn(mp, | |
279 | "file system too large to be mounted on this system."); | |
2451337d | 280 | return -EFBIG; |
ff55068c DC |
281 | } |
282 | ||
283 | if (check_inprogress && sbp->sb_inprogress) { | |
284 | xfs_warn(mp, "Offline file system operation in progress!"); | |
2451337d | 285 | return -EFSCORRUPTED; |
ff55068c | 286 | } |
ff55068c DC |
287 | return 0; |
288 | } | |
289 | ||
290 | void | |
291 | xfs_sb_quota_from_disk(struct xfs_sb *sbp) | |
292 | { | |
293 | /* | |
294 | * older mkfs doesn't initialize quota inodes to NULLFSINO. This | |
295 | * leads to in-core values having two different values for a quota | |
296 | * inode to be invalid: 0 and NULLFSINO. Change it to a single value | |
297 | * NULLFSINO. | |
298 | * | |
299 | * Note that this change affect only the in-core values. These | |
300 | * values are not written back to disk unless any quota information | |
301 | * is written to the disk. Even in that case, sb_pquotino field is | |
302 | * not written to disk unless the superblock supports pquotino. | |
303 | */ | |
304 | if (sbp->sb_uquotino == 0) | |
305 | sbp->sb_uquotino = NULLFSINO; | |
306 | if (sbp->sb_gquotino == 0) | |
307 | sbp->sb_gquotino = NULLFSINO; | |
308 | if (sbp->sb_pquotino == 0) | |
309 | sbp->sb_pquotino = NULLFSINO; | |
310 | ||
311 | /* | |
312 | * We need to do these manipilations only if we are working | |
313 | * with an older version of on-disk superblock. | |
314 | */ | |
315 | if (xfs_sb_version_has_pquotino(sbp)) | |
316 | return; | |
317 | ||
318 | if (sbp->sb_qflags & XFS_OQUOTA_ENFD) | |
319 | sbp->sb_qflags |= (sbp->sb_qflags & XFS_PQUOTA_ACCT) ? | |
320 | XFS_PQUOTA_ENFD : XFS_GQUOTA_ENFD; | |
321 | if (sbp->sb_qflags & XFS_OQUOTA_CHKD) | |
322 | sbp->sb_qflags |= (sbp->sb_qflags & XFS_PQUOTA_ACCT) ? | |
323 | XFS_PQUOTA_CHKD : XFS_GQUOTA_CHKD; | |
324 | sbp->sb_qflags &= ~(XFS_OQUOTA_ENFD | XFS_OQUOTA_CHKD); | |
325 | ||
326 | if (sbp->sb_qflags & XFS_PQUOTA_ACCT) { | |
327 | /* | |
328 | * In older version of superblock, on-disk superblock only | |
329 | * has sb_gquotino, and in-core superblock has both sb_gquotino | |
330 | * and sb_pquotino. But, only one of them is supported at any | |
331 | * point of time. So, if PQUOTA is set in disk superblock, | |
332 | * copy over sb_gquotino to sb_pquotino. | |
333 | */ | |
334 | sbp->sb_pquotino = sbp->sb_gquotino; | |
335 | sbp->sb_gquotino = NULLFSINO; | |
336 | } | |
337 | } | |
338 | ||
5ef828c4 ES |
339 | static void |
340 | __xfs_sb_from_disk( | |
ff55068c | 341 | struct xfs_sb *to, |
5ef828c4 ES |
342 | xfs_dsb_t *from, |
343 | bool convert_xquota) | |
ff55068c DC |
344 | { |
345 | to->sb_magicnum = be32_to_cpu(from->sb_magicnum); | |
346 | to->sb_blocksize = be32_to_cpu(from->sb_blocksize); | |
347 | to->sb_dblocks = be64_to_cpu(from->sb_dblocks); | |
348 | to->sb_rblocks = be64_to_cpu(from->sb_rblocks); | |
349 | to->sb_rextents = be64_to_cpu(from->sb_rextents); | |
350 | memcpy(&to->sb_uuid, &from->sb_uuid, sizeof(to->sb_uuid)); | |
351 | to->sb_logstart = be64_to_cpu(from->sb_logstart); | |
352 | to->sb_rootino = be64_to_cpu(from->sb_rootino); | |
353 | to->sb_rbmino = be64_to_cpu(from->sb_rbmino); | |
354 | to->sb_rsumino = be64_to_cpu(from->sb_rsumino); | |
355 | to->sb_rextsize = be32_to_cpu(from->sb_rextsize); | |
356 | to->sb_agblocks = be32_to_cpu(from->sb_agblocks); | |
357 | to->sb_agcount = be32_to_cpu(from->sb_agcount); | |
358 | to->sb_rbmblocks = be32_to_cpu(from->sb_rbmblocks); | |
359 | to->sb_logblocks = be32_to_cpu(from->sb_logblocks); | |
360 | to->sb_versionnum = be16_to_cpu(from->sb_versionnum); | |
361 | to->sb_sectsize = be16_to_cpu(from->sb_sectsize); | |
362 | to->sb_inodesize = be16_to_cpu(from->sb_inodesize); | |
363 | to->sb_inopblock = be16_to_cpu(from->sb_inopblock); | |
364 | memcpy(&to->sb_fname, &from->sb_fname, sizeof(to->sb_fname)); | |
365 | to->sb_blocklog = from->sb_blocklog; | |
366 | to->sb_sectlog = from->sb_sectlog; | |
367 | to->sb_inodelog = from->sb_inodelog; | |
368 | to->sb_inopblog = from->sb_inopblog; | |
369 | to->sb_agblklog = from->sb_agblklog; | |
370 | to->sb_rextslog = from->sb_rextslog; | |
371 | to->sb_inprogress = from->sb_inprogress; | |
372 | to->sb_imax_pct = from->sb_imax_pct; | |
373 | to->sb_icount = be64_to_cpu(from->sb_icount); | |
374 | to->sb_ifree = be64_to_cpu(from->sb_ifree); | |
375 | to->sb_fdblocks = be64_to_cpu(from->sb_fdblocks); | |
376 | to->sb_frextents = be64_to_cpu(from->sb_frextents); | |
377 | to->sb_uquotino = be64_to_cpu(from->sb_uquotino); | |
378 | to->sb_gquotino = be64_to_cpu(from->sb_gquotino); | |
379 | to->sb_qflags = be16_to_cpu(from->sb_qflags); | |
380 | to->sb_flags = from->sb_flags; | |
381 | to->sb_shared_vn = from->sb_shared_vn; | |
382 | to->sb_inoalignmt = be32_to_cpu(from->sb_inoalignmt); | |
383 | to->sb_unit = be32_to_cpu(from->sb_unit); | |
384 | to->sb_width = be32_to_cpu(from->sb_width); | |
385 | to->sb_dirblklog = from->sb_dirblklog; | |
386 | to->sb_logsectlog = from->sb_logsectlog; | |
387 | to->sb_logsectsize = be16_to_cpu(from->sb_logsectsize); | |
388 | to->sb_logsunit = be32_to_cpu(from->sb_logsunit); | |
389 | to->sb_features2 = be32_to_cpu(from->sb_features2); | |
390 | to->sb_bad_features2 = be32_to_cpu(from->sb_bad_features2); | |
391 | to->sb_features_compat = be32_to_cpu(from->sb_features_compat); | |
392 | to->sb_features_ro_compat = be32_to_cpu(from->sb_features_ro_compat); | |
393 | to->sb_features_incompat = be32_to_cpu(from->sb_features_incompat); | |
394 | to->sb_features_log_incompat = | |
395 | be32_to_cpu(from->sb_features_log_incompat); | |
04dd1a0d ES |
396 | /* crc is only used on disk, not in memory; just init to 0 here. */ |
397 | to->sb_crc = 0; | |
fb4f2b4e | 398 | to->sb_spino_align = be32_to_cpu(from->sb_spino_align); |
ff55068c DC |
399 | to->sb_pquotino = be64_to_cpu(from->sb_pquotino); |
400 | to->sb_lsn = be64_to_cpu(from->sb_lsn); | |
5ef828c4 ES |
401 | /* Convert on-disk flags to in-memory flags? */ |
402 | if (convert_xquota) | |
403 | xfs_sb_quota_from_disk(to); | |
404 | } | |
405 | ||
406 | void | |
407 | xfs_sb_from_disk( | |
408 | struct xfs_sb *to, | |
409 | xfs_dsb_t *from) | |
410 | { | |
411 | __xfs_sb_from_disk(to, from, true); | |
ff55068c DC |
412 | } |
413 | ||
4d11a402 | 414 | static void |
ff55068c | 415 | xfs_sb_quota_to_disk( |
4d11a402 DC |
416 | struct xfs_dsb *to, |
417 | struct xfs_sb *from) | |
ff55068c DC |
418 | { |
419 | __uint16_t qflags = from->sb_qflags; | |
420 | ||
4d11a402 DC |
421 | to->sb_uquotino = cpu_to_be64(from->sb_uquotino); |
422 | if (xfs_sb_version_has_pquotino(from)) { | |
423 | to->sb_qflags = cpu_to_be16(from->sb_qflags); | |
424 | to->sb_gquotino = cpu_to_be64(from->sb_gquotino); | |
425 | to->sb_pquotino = cpu_to_be64(from->sb_pquotino); | |
426 | return; | |
427 | } | |
428 | ||
ff55068c | 429 | /* |
4d11a402 DC |
430 | * The in-core version of sb_qflags do not have XFS_OQUOTA_* |
431 | * flags, whereas the on-disk version does. So, convert incore | |
432 | * XFS_{PG}QUOTA_* flags to on-disk XFS_OQUOTA_* flags. | |
ff55068c | 433 | */ |
4d11a402 DC |
434 | qflags &= ~(XFS_PQUOTA_ENFD | XFS_PQUOTA_CHKD | |
435 | XFS_GQUOTA_ENFD | XFS_GQUOTA_CHKD); | |
ff55068c | 436 | |
4d11a402 DC |
437 | if (from->sb_qflags & |
438 | (XFS_PQUOTA_ENFD | XFS_GQUOTA_ENFD)) | |
439 | qflags |= XFS_OQUOTA_ENFD; | |
440 | if (from->sb_qflags & | |
441 | (XFS_PQUOTA_CHKD | XFS_GQUOTA_CHKD)) | |
442 | qflags |= XFS_OQUOTA_CHKD; | |
443 | to->sb_qflags = cpu_to_be16(qflags); | |
ff55068c DC |
444 | |
445 | /* | |
4d11a402 DC |
446 | * GQUOTINO and PQUOTINO cannot be used together in versions |
447 | * of superblock that do not have pquotino. from->sb_flags | |
448 | * tells us which quota is active and should be copied to | |
449 | * disk. If neither are active, we should NULL the inode. | |
03e01349 | 450 | * |
4d11a402 DC |
451 | * In all cases, the separate pquotino must remain 0 because it |
452 | * it beyond the "end" of the valid non-pquotino superblock. | |
ff55068c | 453 | */ |
4d11a402 | 454 | if (from->sb_qflags & XFS_GQUOTA_ACCT) |
ff55068c | 455 | to->sb_gquotino = cpu_to_be64(from->sb_gquotino); |
4d11a402 | 456 | else if (from->sb_qflags & XFS_PQUOTA_ACCT) |
ff55068c | 457 | to->sb_gquotino = cpu_to_be64(from->sb_pquotino); |
03e01349 DC |
458 | else { |
459 | /* | |
460 | * We can't rely on just the fields being logged to tell us | |
461 | * that it is safe to write NULLFSINO - we should only do that | |
462 | * if quotas are not actually enabled. Hence only write | |
463 | * NULLFSINO if both in-core quota inodes are NULL. | |
464 | */ | |
465 | if (from->sb_gquotino == NULLFSINO && | |
466 | from->sb_pquotino == NULLFSINO) | |
467 | to->sb_gquotino = cpu_to_be64(NULLFSINO); | |
468 | } | |
ff55068c | 469 | |
4d11a402 | 470 | to->sb_pquotino = 0; |
ff55068c DC |
471 | } |
472 | ||
ff55068c DC |
473 | void |
474 | xfs_sb_to_disk( | |
4d11a402 DC |
475 | struct xfs_dsb *to, |
476 | struct xfs_sb *from) | |
ff55068c | 477 | { |
4d11a402 DC |
478 | xfs_sb_quota_to_disk(to, from); |
479 | ||
480 | to->sb_magicnum = cpu_to_be32(from->sb_magicnum); | |
481 | to->sb_blocksize = cpu_to_be32(from->sb_blocksize); | |
482 | to->sb_dblocks = cpu_to_be64(from->sb_dblocks); | |
483 | to->sb_rblocks = cpu_to_be64(from->sb_rblocks); | |
484 | to->sb_rextents = cpu_to_be64(from->sb_rextents); | |
485 | memcpy(&to->sb_uuid, &from->sb_uuid, sizeof(to->sb_uuid)); | |
486 | to->sb_logstart = cpu_to_be64(from->sb_logstart); | |
487 | to->sb_rootino = cpu_to_be64(from->sb_rootino); | |
488 | to->sb_rbmino = cpu_to_be64(from->sb_rbmino); | |
489 | to->sb_rsumino = cpu_to_be64(from->sb_rsumino); | |
490 | to->sb_rextsize = cpu_to_be32(from->sb_rextsize); | |
491 | to->sb_agblocks = cpu_to_be32(from->sb_agblocks); | |
492 | to->sb_agcount = cpu_to_be32(from->sb_agcount); | |
493 | to->sb_rbmblocks = cpu_to_be32(from->sb_rbmblocks); | |
494 | to->sb_logblocks = cpu_to_be32(from->sb_logblocks); | |
495 | to->sb_versionnum = cpu_to_be16(from->sb_versionnum); | |
496 | to->sb_sectsize = cpu_to_be16(from->sb_sectsize); | |
497 | to->sb_inodesize = cpu_to_be16(from->sb_inodesize); | |
498 | to->sb_inopblock = cpu_to_be16(from->sb_inopblock); | |
499 | memcpy(&to->sb_fname, &from->sb_fname, sizeof(to->sb_fname)); | |
500 | to->sb_blocklog = from->sb_blocklog; | |
501 | to->sb_sectlog = from->sb_sectlog; | |
502 | to->sb_inodelog = from->sb_inodelog; | |
503 | to->sb_inopblog = from->sb_inopblog; | |
504 | to->sb_agblklog = from->sb_agblklog; | |
505 | to->sb_rextslog = from->sb_rextslog; | |
506 | to->sb_inprogress = from->sb_inprogress; | |
507 | to->sb_imax_pct = from->sb_imax_pct; | |
508 | to->sb_icount = cpu_to_be64(from->sb_icount); | |
509 | to->sb_ifree = cpu_to_be64(from->sb_ifree); | |
510 | to->sb_fdblocks = cpu_to_be64(from->sb_fdblocks); | |
511 | to->sb_frextents = cpu_to_be64(from->sb_frextents); | |
ff55068c | 512 | |
4d11a402 DC |
513 | to->sb_flags = from->sb_flags; |
514 | to->sb_shared_vn = from->sb_shared_vn; | |
515 | to->sb_inoalignmt = cpu_to_be32(from->sb_inoalignmt); | |
516 | to->sb_unit = cpu_to_be32(from->sb_unit); | |
517 | to->sb_width = cpu_to_be32(from->sb_width); | |
518 | to->sb_dirblklog = from->sb_dirblklog; | |
519 | to->sb_logsectlog = from->sb_logsectlog; | |
520 | to->sb_logsectsize = cpu_to_be16(from->sb_logsectsize); | |
521 | to->sb_logsunit = cpu_to_be32(from->sb_logsunit); | |
074e427b DC |
522 | |
523 | /* | |
524 | * We need to ensure that bad_features2 always matches features2. | |
525 | * Hence we enforce that here rather than having to remember to do it | |
526 | * everywhere else that updates features2. | |
527 | */ | |
528 | from->sb_bad_features2 = from->sb_features2; | |
4d11a402 DC |
529 | to->sb_features2 = cpu_to_be32(from->sb_features2); |
530 | to->sb_bad_features2 = cpu_to_be32(from->sb_bad_features2); | |
531 | ||
532 | if (xfs_sb_version_hascrc(from)) { | |
533 | to->sb_features_compat = cpu_to_be32(from->sb_features_compat); | |
534 | to->sb_features_ro_compat = | |
535 | cpu_to_be32(from->sb_features_ro_compat); | |
536 | to->sb_features_incompat = | |
537 | cpu_to_be32(from->sb_features_incompat); | |
538 | to->sb_features_log_incompat = | |
539 | cpu_to_be32(from->sb_features_log_incompat); | |
fb4f2b4e | 540 | to->sb_spino_align = cpu_to_be32(from->sb_spino_align); |
4d11a402 | 541 | to->sb_lsn = cpu_to_be64(from->sb_lsn); |
ff55068c DC |
542 | } |
543 | } | |
544 | ||
545 | static int | |
546 | xfs_sb_verify( | |
547 | struct xfs_buf *bp, | |
548 | bool check_version) | |
549 | { | |
550 | struct xfs_mount *mp = bp->b_target->bt_mount; | |
551 | struct xfs_sb sb; | |
552 | ||
5ef828c4 ES |
553 | /* |
554 | * Use call variant which doesn't convert quota flags from disk | |
555 | * format, because xfs_mount_validate_sb checks the on-disk flags. | |
556 | */ | |
557 | __xfs_sb_from_disk(&sb, XFS_BUF_TO_SBP(bp), false); | |
ff55068c DC |
558 | |
559 | /* | |
560 | * Only check the in progress field for the primary superblock as | |
561 | * mkfs.xfs doesn't clear it from secondary superblocks. | |
562 | */ | |
563 | return xfs_mount_validate_sb(mp, &sb, bp->b_bn == XFS_SB_DADDR, | |
564 | check_version); | |
565 | } | |
566 | ||
567 | /* | |
568 | * If the superblock has the CRC feature bit set or the CRC field is non-null, | |
569 | * check that the CRC is valid. We check the CRC field is non-null because a | |
570 | * single bit error could clear the feature bit and unused parts of the | |
571 | * superblock are supposed to be zero. Hence a non-null crc field indicates that | |
572 | * we've potentially lost a feature bit and we should check it anyway. | |
10e6e65d ES |
573 | * |
574 | * However, past bugs (i.e. in growfs) left non-zeroed regions beyond the | |
575 | * last field in V4 secondary superblocks. So for secondary superblocks, | |
576 | * we are more forgiving, and ignore CRC failures if the primary doesn't | |
577 | * indicate that the fs version is V5. | |
ff55068c DC |
578 | */ |
579 | static void | |
580 | xfs_sb_read_verify( | |
581 | struct xfs_buf *bp) | |
582 | { | |
583 | struct xfs_mount *mp = bp->b_target->bt_mount; | |
584 | struct xfs_dsb *dsb = XFS_BUF_TO_SBP(bp); | |
585 | int error; | |
586 | ||
587 | /* | |
588 | * open code the version check to avoid needing to convert the entire | |
589 | * superblock from disk order just to check the version number | |
590 | */ | |
591 | if (dsb->sb_magicnum == cpu_to_be32(XFS_SB_MAGIC) && | |
592 | (((be16_to_cpu(dsb->sb_versionnum) & XFS_SB_VERSION_NUMBITS) == | |
593 | XFS_SB_VERSION_5) || | |
594 | dsb->sb_crc != 0)) { | |
595 | ||
51582170 | 596 | if (!xfs_buf_verify_cksum(bp, XFS_SB_CRC_OFF)) { |
10e6e65d | 597 | /* Only fail bad secondaries on a known V5 filesystem */ |
7a01e707 | 598 | if (bp->b_bn == XFS_SB_DADDR || |
10e6e65d | 599 | xfs_sb_version_hascrc(&mp->m_sb)) { |
2451337d | 600 | error = -EFSBADCRC; |
10e6e65d ES |
601 | goto out_error; |
602 | } | |
ff55068c DC |
603 | } |
604 | } | |
605 | error = xfs_sb_verify(bp, true); | |
606 | ||
607 | out_error: | |
608 | if (error) { | |
ff55068c | 609 | xfs_buf_ioerror(bp, error); |
2451337d | 610 | if (error == -EFSCORRUPTED || error == -EFSBADCRC) |
ce5028cf | 611 | xfs_verifier_error(bp); |
ff55068c DC |
612 | } |
613 | } | |
614 | ||
615 | /* | |
616 | * We may be probed for a filesystem match, so we may not want to emit | |
617 | * messages when the superblock buffer is not actually an XFS superblock. | |
2533787a | 618 | * If we find an XFS superblock, then run a normal, noisy mount because we are |
ff55068c DC |
619 | * really going to mount it and want to know about errors. |
620 | */ | |
621 | static void | |
622 | xfs_sb_quiet_read_verify( | |
623 | struct xfs_buf *bp) | |
624 | { | |
625 | struct xfs_dsb *dsb = XFS_BUF_TO_SBP(bp); | |
626 | ||
ff55068c DC |
627 | if (dsb->sb_magicnum == cpu_to_be32(XFS_SB_MAGIC)) { |
628 | /* XFS filesystem, verify noisily! */ | |
629 | xfs_sb_read_verify(bp); | |
630 | return; | |
631 | } | |
632 | /* quietly fail */ | |
2451337d | 633 | xfs_buf_ioerror(bp, -EWRONGFS); |
ff55068c DC |
634 | } |
635 | ||
636 | static void | |
637 | xfs_sb_write_verify( | |
638 | struct xfs_buf *bp) | |
639 | { | |
640 | struct xfs_mount *mp = bp->b_target->bt_mount; | |
641 | struct xfs_buf_log_item *bip = bp->b_fspriv; | |
642 | int error; | |
643 | ||
644 | error = xfs_sb_verify(bp, false); | |
645 | if (error) { | |
ff55068c | 646 | xfs_buf_ioerror(bp, error); |
ce5028cf | 647 | xfs_verifier_error(bp); |
ff55068c DC |
648 | return; |
649 | } | |
650 | ||
651 | if (!xfs_sb_version_hascrc(&mp->m_sb)) | |
652 | return; | |
653 | ||
654 | if (bip) | |
655 | XFS_BUF_TO_SBP(bp)->sb_lsn = cpu_to_be64(bip->bli_item.li_lsn); | |
656 | ||
f1dbcd7e | 657 | xfs_buf_update_cksum(bp, XFS_SB_CRC_OFF); |
ff55068c DC |
658 | } |
659 | ||
660 | const struct xfs_buf_ops xfs_sb_buf_ops = { | |
661 | .verify_read = xfs_sb_read_verify, | |
662 | .verify_write = xfs_sb_write_verify, | |
663 | }; | |
664 | ||
665 | const struct xfs_buf_ops xfs_sb_quiet_buf_ops = { | |
666 | .verify_read = xfs_sb_quiet_read_verify, | |
667 | .verify_write = xfs_sb_write_verify, | |
668 | }; | |
669 | ||
670 | /* | |
671 | * xfs_mount_common | |
672 | * | |
673 | * Mount initialization code establishing various mount | |
674 | * fields from the superblock associated with the given | |
675 | * mount structure | |
676 | */ | |
677 | void | |
678 | xfs_sb_mount_common( | |
679 | struct xfs_mount *mp, | |
680 | struct xfs_sb *sbp) | |
681 | { | |
682 | mp->m_agfrotor = mp->m_agirotor = 0; | |
683 | spin_lock_init(&mp->m_agirotor_lock); | |
684 | mp->m_maxagi = mp->m_sb.sb_agcount; | |
685 | mp->m_blkbit_log = sbp->sb_blocklog + XFS_NBBYLOG; | |
686 | mp->m_blkbb_log = sbp->sb_blocklog - BBSHIFT; | |
687 | mp->m_sectbb_log = sbp->sb_sectlog - BBSHIFT; | |
688 | mp->m_agno_log = xfs_highbit32(sbp->sb_agcount - 1) + 1; | |
689 | mp->m_agino_log = sbp->sb_inopblog + sbp->sb_agblklog; | |
690 | mp->m_blockmask = sbp->sb_blocksize - 1; | |
691 | mp->m_blockwsize = sbp->sb_blocksize >> XFS_WORDLOG; | |
692 | mp->m_blockwmask = mp->m_blockwsize - 1; | |
693 | ||
694 | mp->m_alloc_mxr[0] = xfs_allocbt_maxrecs(mp, sbp->sb_blocksize, 1); | |
695 | mp->m_alloc_mxr[1] = xfs_allocbt_maxrecs(mp, sbp->sb_blocksize, 0); | |
696 | mp->m_alloc_mnr[0] = mp->m_alloc_mxr[0] / 2; | |
697 | mp->m_alloc_mnr[1] = mp->m_alloc_mxr[1] / 2; | |
698 | ||
699 | mp->m_inobt_mxr[0] = xfs_inobt_maxrecs(mp, sbp->sb_blocksize, 1); | |
700 | mp->m_inobt_mxr[1] = xfs_inobt_maxrecs(mp, sbp->sb_blocksize, 0); | |
701 | mp->m_inobt_mnr[0] = mp->m_inobt_mxr[0] / 2; | |
702 | mp->m_inobt_mnr[1] = mp->m_inobt_mxr[1] / 2; | |
703 | ||
704 | mp->m_bmap_dmxr[0] = xfs_bmbt_maxrecs(mp, sbp->sb_blocksize, 1); | |
705 | mp->m_bmap_dmxr[1] = xfs_bmbt_maxrecs(mp, sbp->sb_blocksize, 0); | |
706 | mp->m_bmap_dmnr[0] = mp->m_bmap_dmxr[0] / 2; | |
707 | mp->m_bmap_dmnr[1] = mp->m_bmap_dmxr[1] / 2; | |
708 | ||
709 | mp->m_bsize = XFS_FSB_TO_BB(mp, 1); | |
710 | mp->m_ialloc_inos = (int)MAX((__uint16_t)XFS_INODES_PER_CHUNK, | |
711 | sbp->sb_inopblock); | |
712 | mp->m_ialloc_blks = mp->m_ialloc_inos >> sbp->sb_inopblog; | |
066a1884 BF |
713 | |
714 | if (sbp->sb_spino_align) | |
715 | mp->m_ialloc_min_blks = sbp->sb_spino_align; | |
716 | else | |
717 | mp->m_ialloc_min_blks = mp->m_ialloc_blks; | |
ff55068c DC |
718 | } |
719 | ||
720 | /* | |
721 | * xfs_initialize_perag_data | |
722 | * | |
723 | * Read in each per-ag structure so we can count up the number of | |
724 | * allocated inodes, free inodes and used filesystem blocks as this | |
725 | * information is no longer persistent in the superblock. Once we have | |
726 | * this information, write it into the in-core superblock structure. | |
727 | */ | |
728 | int | |
729 | xfs_initialize_perag_data( | |
730 | struct xfs_mount *mp, | |
731 | xfs_agnumber_t agcount) | |
732 | { | |
733 | xfs_agnumber_t index; | |
734 | xfs_perag_t *pag; | |
735 | xfs_sb_t *sbp = &mp->m_sb; | |
736 | uint64_t ifree = 0; | |
737 | uint64_t ialloc = 0; | |
738 | uint64_t bfree = 0; | |
739 | uint64_t bfreelst = 0; | |
740 | uint64_t btree = 0; | |
741 | int error; | |
742 | ||
743 | for (index = 0; index < agcount; index++) { | |
744 | /* | |
745 | * read the agf, then the agi. This gets us | |
746 | * all the information we need and populates the | |
747 | * per-ag structures for us. | |
748 | */ | |
749 | error = xfs_alloc_pagf_init(mp, NULL, index, 0); | |
750 | if (error) | |
751 | return error; | |
752 | ||
753 | error = xfs_ialloc_pagi_init(mp, NULL, index); | |
754 | if (error) | |
755 | return error; | |
756 | pag = xfs_perag_get(mp, index); | |
757 | ifree += pag->pagi_freecount; | |
758 | ialloc += pag->pagi_count; | |
759 | bfree += pag->pagf_freeblks; | |
760 | bfreelst += pag->pagf_flcount; | |
761 | btree += pag->pagf_btreeblks; | |
762 | xfs_perag_put(pag); | |
763 | } | |
5681ca40 DC |
764 | |
765 | /* Overwrite incore superblock counters with just-read data */ | |
ff55068c DC |
766 | spin_lock(&mp->m_sb_lock); |
767 | sbp->sb_ifree = ifree; | |
768 | sbp->sb_icount = ialloc; | |
769 | sbp->sb_fdblocks = bfree + bfreelst + btree; | |
770 | spin_unlock(&mp->m_sb_lock); | |
771 | ||
5681ca40 | 772 | xfs_reinit_percpu_counters(mp); |
ff55068c DC |
773 | |
774 | return 0; | |
775 | } | |
776 | ||
777 | /* | |
61e63ecb DC |
778 | * xfs_log_sb() can be used to copy arbitrary changes to the in-core superblock |
779 | * into the superblock buffer to be logged. It does not provide the higher | |
780 | * level of locking that is needed to protect the in-core superblock from | |
781 | * concurrent access. | |
ff55068c DC |
782 | */ |
783 | void | |
61e63ecb | 784 | xfs_log_sb( |
4d11a402 | 785 | struct xfs_trans *tp) |
ff55068c | 786 | { |
4d11a402 DC |
787 | struct xfs_mount *mp = tp->t_mountp; |
788 | struct xfs_buf *bp = xfs_trans_getsb(tp, mp, 0); | |
ff55068c | 789 | |
501ab323 | 790 | mp->m_sb.sb_icount = percpu_counter_sum(&mp->m_icount); |
e88b64ea | 791 | mp->m_sb.sb_ifree = percpu_counter_sum(&mp->m_ifree); |
0d485ada | 792 | mp->m_sb.sb_fdblocks = percpu_counter_sum(&mp->m_fdblocks); |
501ab323 | 793 | |
4d11a402 | 794 | xfs_sb_to_disk(XFS_BUF_TO_SBP(bp), &mp->m_sb); |
ff55068c | 795 | xfs_trans_buf_set_type(tp, bp, XFS_BLFT_SB_BUF); |
4d11a402 | 796 | xfs_trans_log_buf(tp, bp, 0, sizeof(struct xfs_dsb)); |
ff55068c | 797 | } |
61e63ecb DC |
798 | |
799 | /* | |
800 | * xfs_sync_sb | |
801 | * | |
802 | * Sync the superblock to disk. | |
803 | * | |
804 | * Note that the caller is responsible for checking the frozen state of the | |
805 | * filesystem. This procedure uses the non-blocking transaction allocator and | |
806 | * thus will allow modifications to a frozen fs. This is required because this | |
807 | * code can be called during the process of freezing where use of the high-level | |
808 | * allocator would deadlock. | |
809 | */ | |
810 | int | |
811 | xfs_sync_sb( | |
812 | struct xfs_mount *mp, | |
813 | bool wait) | |
814 | { | |
815 | struct xfs_trans *tp; | |
816 | int error; | |
817 | ||
818 | tp = _xfs_trans_alloc(mp, XFS_TRANS_SB_CHANGE, KM_SLEEP); | |
819 | error = xfs_trans_reserve(tp, &M_RES(mp)->tr_sb, 0, 0); | |
820 | if (error) { | |
4906e215 | 821 | xfs_trans_cancel(tp); |
61e63ecb DC |
822 | return error; |
823 | } | |
824 | ||
825 | xfs_log_sb(tp); | |
826 | if (wait) | |
827 | xfs_trans_set_sync(tp); | |
70393313 | 828 | return xfs_trans_commit(tp); |
61e63ecb | 829 | } |