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2bd0ea18 | 1 | /* |
5e656dbb | 2 | * Copyright (c) 2000-2005 Silicon Graphics, Inc. |
da23017d | 3 | * All Rights Reserved. |
2bd0ea18 | 4 | * |
da23017d NS |
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 | |
2bd0ea18 NS |
7 | * published by the Free Software Foundation. |
8 | * | |
da23017d NS |
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. | |
2bd0ea18 | 13 | * |
da23017d NS |
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 | |
2bd0ea18 | 17 | */ |
2bd0ea18 NS |
18 | #include <xfs.h> |
19 | ||
4896e6c8 DC |
20 | /* |
21 | * Physical superblock buffer manipulations. Shared with libxfs in userspace. | |
22 | */ | |
23 | ||
5e656dbb BN |
24 | static const struct { |
25 | short offset; | |
26 | short type; /* 0 = integer | |
27 | * 1 = binary / string (no translation) | |
28 | */ | |
2bd0ea18 | 29 | } xfs_sb_info[] = { |
4896e6c8 DC |
30 | { offsetof(xfs_sb_t, sb_magicnum), 0 }, |
31 | { offsetof(xfs_sb_t, sb_blocksize), 0 }, | |
32 | { offsetof(xfs_sb_t, sb_dblocks), 0 }, | |
33 | { offsetof(xfs_sb_t, sb_rblocks), 0 }, | |
34 | { offsetof(xfs_sb_t, sb_rextents), 0 }, | |
35 | { offsetof(xfs_sb_t, sb_uuid), 1 }, | |
36 | { offsetof(xfs_sb_t, sb_logstart), 0 }, | |
37 | { offsetof(xfs_sb_t, sb_rootino), 0 }, | |
38 | { offsetof(xfs_sb_t, sb_rbmino), 0 }, | |
39 | { offsetof(xfs_sb_t, sb_rsumino), 0 }, | |
40 | { offsetof(xfs_sb_t, sb_rextsize), 0 }, | |
41 | { offsetof(xfs_sb_t, sb_agblocks), 0 }, | |
42 | { offsetof(xfs_sb_t, sb_agcount), 0 }, | |
43 | { offsetof(xfs_sb_t, sb_rbmblocks), 0 }, | |
44 | { offsetof(xfs_sb_t, sb_logblocks), 0 }, | |
45 | { offsetof(xfs_sb_t, sb_versionnum), 0 }, | |
46 | { offsetof(xfs_sb_t, sb_sectsize), 0 }, | |
47 | { offsetof(xfs_sb_t, sb_inodesize), 0 }, | |
48 | { offsetof(xfs_sb_t, sb_inopblock), 0 }, | |
49 | { offsetof(xfs_sb_t, sb_fname[0]), 1 }, | |
50 | { offsetof(xfs_sb_t, sb_blocklog), 0 }, | |
51 | { offsetof(xfs_sb_t, sb_sectlog), 0 }, | |
52 | { offsetof(xfs_sb_t, sb_inodelog), 0 }, | |
53 | { offsetof(xfs_sb_t, sb_inopblog), 0 }, | |
54 | { offsetof(xfs_sb_t, sb_agblklog), 0 }, | |
55 | { offsetof(xfs_sb_t, sb_rextslog), 0 }, | |
56 | { offsetof(xfs_sb_t, sb_inprogress), 0 }, | |
57 | { offsetof(xfs_sb_t, sb_imax_pct), 0 }, | |
58 | { offsetof(xfs_sb_t, sb_icount), 0 }, | |
59 | { offsetof(xfs_sb_t, sb_ifree), 0 }, | |
60 | { offsetof(xfs_sb_t, sb_fdblocks), 0 }, | |
61 | { offsetof(xfs_sb_t, sb_frextents), 0 }, | |
62 | { offsetof(xfs_sb_t, sb_uquotino), 0 }, | |
63 | { offsetof(xfs_sb_t, sb_gquotino), 0 }, | |
64 | { offsetof(xfs_sb_t, sb_qflags), 0 }, | |
65 | { offsetof(xfs_sb_t, sb_flags), 0 }, | |
66 | { offsetof(xfs_sb_t, sb_shared_vn), 0 }, | |
67 | { offsetof(xfs_sb_t, sb_inoalignmt), 0 }, | |
68 | { offsetof(xfs_sb_t, sb_unit), 0 }, | |
69 | { offsetof(xfs_sb_t, sb_width), 0 }, | |
70 | { offsetof(xfs_sb_t, sb_dirblklog), 0 }, | |
71 | { offsetof(xfs_sb_t, sb_logsectlog), 0 }, | |
72 | { offsetof(xfs_sb_t, sb_logsectsize), 0 }, | |
73 | { offsetof(xfs_sb_t, sb_logsunit), 0 }, | |
74 | { offsetof(xfs_sb_t, sb_features2), 0 }, | |
75 | { offsetof(xfs_sb_t, sb_bad_features2), 0 }, | |
76 | { offsetof(xfs_sb_t, sb_features_compat), 0 }, | |
77 | { offsetof(xfs_sb_t, sb_features_ro_compat), 0 }, | |
78 | { offsetof(xfs_sb_t, sb_features_incompat), 0 }, | |
79 | { offsetof(xfs_sb_t, sb_features_log_incompat), 0 }, | |
80 | { offsetof(xfs_sb_t, sb_crc), 0 }, | |
81 | { offsetof(xfs_sb_t, sb_pad), 0 }, | |
82 | { offsetof(xfs_sb_t, sb_pquotino), 0 }, | |
83 | { offsetof(xfs_sb_t, sb_lsn), 0 }, | |
84 | { sizeof(xfs_sb_t), 0 } | |
2bd0ea18 NS |
85 | }; |
86 | ||
56b2de80 DC |
87 | /* |
88 | * Reference counting access wrappers to the perag structures. | |
89 | * Because we never free per-ag structures, the only thing we | |
90 | * have to protect against changes is the tree structure itself. | |
91 | */ | |
92 | struct xfs_perag * | |
4896e6c8 DC |
93 | xfs_perag_get( |
94 | struct xfs_mount *mp, | |
95 | xfs_agnumber_t agno) | |
a33a9e62 | 96 | { |
56b2de80 DC |
97 | struct xfs_perag *pag; |
98 | int ref = 0; | |
99 | ||
100 | rcu_read_lock(); | |
101 | pag = radix_tree_lookup(&mp->m_perag_tree, agno); | |
102 | if (pag) { | |
103 | ASSERT(atomic_read(&pag->pag_ref) >= 0); | |
104 | ref = atomic_inc_return(&pag->pag_ref); | |
a33a9e62 | 105 | } |
56b2de80 | 106 | rcu_read_unlock(); |
a2ceac1f | 107 | trace_xfs_perag_get(mp, agno, ref, _RET_IP_); |
56b2de80 DC |
108 | return pag; |
109 | } | |
a33a9e62 | 110 | |
4896e6c8 DC |
111 | /* |
112 | * search from @first to find the next perag with the given tag set. | |
113 | */ | |
114 | struct xfs_perag * | |
115 | xfs_perag_get_tag( | |
116 | struct xfs_mount *mp, | |
117 | xfs_agnumber_t first, | |
118 | int tag) | |
119 | { | |
120 | struct xfs_perag *pag; | |
121 | int found; | |
122 | int ref; | |
123 | ||
124 | rcu_read_lock(); | |
125 | found = radix_tree_gang_lookup_tag(&mp->m_perag_tree, | |
126 | (void **)&pag, first, 1, tag); | |
127 | if (found <= 0) { | |
128 | rcu_read_unlock(); | |
129 | return NULL; | |
130 | } | |
131 | ref = atomic_inc_return(&pag->pag_ref); | |
132 | rcu_read_unlock(); | |
133 | trace_xfs_perag_get_tag(mp, pag->pag_agno, ref, _RET_IP_); | |
134 | return pag; | |
135 | } | |
136 | ||
56b2de80 | 137 | void |
4896e6c8 DC |
138 | xfs_perag_put( |
139 | struct xfs_perag *pag) | |
56b2de80 DC |
140 | { |
141 | int ref; | |
a33a9e62 | 142 | |
56b2de80 DC |
143 | ASSERT(atomic_read(&pag->pag_ref) > 0); |
144 | ref = atomic_dec_return(&pag->pag_ref); | |
145 | trace_xfs_perag_put(pag->pag_mount, pag->pag_agno, ref, _RET_IP_); | |
a33a9e62 | 146 | } |
cdded3d8 | 147 | |
a2ceac1f DC |
148 | /* |
149 | * Check the validity of the SB found. | |
150 | */ | |
151 | STATIC int | |
152 | xfs_mount_validate_sb( | |
153 | xfs_mount_t *mp, | |
154 | xfs_sb_t *sbp, | |
5629f836 DC |
155 | bool check_inprogress, |
156 | bool check_version) | |
a2ceac1f DC |
157 | { |
158 | ||
159 | /* | |
160 | * If the log device and data device have the | |
161 | * same device number, the log is internal. | |
162 | * Consequently, the sb_logstart should be non-zero. If | |
163 | * we have a zero sb_logstart in this case, we may be trying to mount | |
164 | * a volume filesystem in a non-volume manner. | |
165 | */ | |
166 | if (sbp->sb_magicnum != XFS_SB_MAGIC) { | |
167 | xfs_warn(mp, "bad magic number"); | |
168 | return XFS_ERROR(EWRONGFS); | |
169 | } | |
170 | ||
5565d79a | 171 | |
a2ceac1f DC |
172 | if (!xfs_sb_good_version(sbp)) { |
173 | xfs_warn(mp, "bad version"); | |
174 | return XFS_ERROR(EWRONGFS); | |
175 | } | |
176 | ||
5565d79a | 177 | /* |
6567f1f9 | 178 | * Version 5 superblock feature mask validation. Reject combinations the |
4896e6c8 DC |
179 | * kernel cannot support up front before checking anything else. For |
180 | * write validation, we don't need to check feature masks. | |
5565d79a | 181 | */ |
5629f836 | 182 | if (check_version && XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) { |
5565d79a | 183 | xfs_alert(mp, |
6567f1f9 DC |
184 | "Version 5 superblock detected. xfsprogs has EXPERIMENTAL support enabled!\n" |
185 | "Use of these features is at your own risk!"); | |
186 | ||
187 | if (xfs_sb_has_compat_feature(sbp, | |
188 | XFS_SB_FEAT_COMPAT_UNKNOWN)) { | |
189 | xfs_warn(mp, | |
190 | "Superblock has unknown compatible features (0x%x) enabled.\n" | |
191 | "Using a more recent xfsprogs is recommended.", | |
192 | (sbp->sb_features_compat & | |
193 | XFS_SB_FEAT_COMPAT_UNKNOWN)); | |
194 | } | |
195 | ||
196 | if (xfs_sb_has_ro_compat_feature(sbp, | |
197 | XFS_SB_FEAT_RO_COMPAT_UNKNOWN)) { | |
198 | xfs_warn(mp, | |
199 | "Superblock has unknown read-only compatible features (0x%x) enabled.\n" | |
200 | "Using a more recent xfsprogs is recommended.", | |
201 | (sbp->sb_features_ro_compat & | |
202 | XFS_SB_FEAT_RO_COMPAT_UNKNOWN)); | |
203 | } | |
204 | if (xfs_sb_has_incompat_feature(sbp, | |
205 | XFS_SB_FEAT_INCOMPAT_UNKNOWN)) { | |
206 | xfs_warn(mp, | |
207 | "Superblock has unknown incompatible features (0x%x) enabled.\n" | |
208 | "Filesystem can not be safely operated on by this xfsprogs installation", | |
209 | (sbp->sb_features_incompat & | |
210 | XFS_SB_FEAT_INCOMPAT_UNKNOWN)); | |
211 | return XFS_ERROR(EINVAL); | |
212 | } | |
5565d79a DC |
213 | } |
214 | ||
4896e6c8 DC |
215 | if (xfs_sb_version_has_pquotino(sbp)) { |
216 | if (sbp->sb_qflags & (XFS_OQUOTA_ENFD | XFS_OQUOTA_CHKD)) { | |
217 | xfs_notice(mp, | |
12864fd9 | 218 | "Version 5 of Super block has XFS_OQUOTA bits."); |
4896e6c8 DC |
219 | return XFS_ERROR(EFSCORRUPTED); |
220 | } | |
221 | } else if (sbp->sb_qflags & (XFS_PQUOTA_ENFD | XFS_GQUOTA_ENFD | | |
222 | XFS_PQUOTA_CHKD | XFS_GQUOTA_CHKD)) { | |
223 | xfs_notice(mp, | |
12864fd9 | 224 | "Superblock earlier than Version 5 has XFS_[PQ]UOTA_{ENFD|CHKD} bits."); |
4896e6c8 | 225 | return XFS_ERROR(EFSCORRUPTED); |
342aef1e CS |
226 | } |
227 | ||
a2ceac1f | 228 | if (unlikely( |
6567f1f9 | 229 | sbp->sb_logstart == 0 && mp->m_logdev_targp == mp->m_ddev_targp)) { |
a2ceac1f DC |
230 | xfs_warn(mp, |
231 | "filesystem is marked as having an external log; " | |
232 | "specify logdev on the mount command line."); | |
233 | return XFS_ERROR(EINVAL); | |
234 | } | |
235 | ||
236 | if (unlikely( | |
6567f1f9 | 237 | sbp->sb_logstart != 0 && mp->m_logdev_targp != mp->m_ddev_targp)) { |
a2ceac1f DC |
238 | xfs_warn(mp, |
239 | "filesystem is marked as having an internal log; " | |
240 | "do not specify logdev on the mount command line."); | |
241 | return XFS_ERROR(EINVAL); | |
242 | } | |
243 | ||
244 | /* | |
245 | * More sanity checking. Most of these were stolen directly from | |
246 | * xfs_repair. | |
247 | */ | |
248 | if (unlikely( | |
249 | sbp->sb_agcount <= 0 || | |
250 | sbp->sb_sectsize < XFS_MIN_SECTORSIZE || | |
251 | sbp->sb_sectsize > XFS_MAX_SECTORSIZE || | |
252 | sbp->sb_sectlog < XFS_MIN_SECTORSIZE_LOG || | |
253 | sbp->sb_sectlog > XFS_MAX_SECTORSIZE_LOG || | |
254 | sbp->sb_sectsize != (1 << sbp->sb_sectlog) || | |
255 | sbp->sb_blocksize < XFS_MIN_BLOCKSIZE || | |
256 | sbp->sb_blocksize > XFS_MAX_BLOCKSIZE || | |
257 | sbp->sb_blocklog < XFS_MIN_BLOCKSIZE_LOG || | |
258 | sbp->sb_blocklog > XFS_MAX_BLOCKSIZE_LOG || | |
259 | sbp->sb_blocksize != (1 << sbp->sb_blocklog) || | |
260 | sbp->sb_inodesize < XFS_DINODE_MIN_SIZE || | |
261 | sbp->sb_inodesize > XFS_DINODE_MAX_SIZE || | |
262 | sbp->sb_inodelog < XFS_DINODE_MIN_LOG || | |
263 | sbp->sb_inodelog > XFS_DINODE_MAX_LOG || | |
264 | sbp->sb_inodesize != (1 << sbp->sb_inodelog) || | |
265 | (sbp->sb_blocklog - sbp->sb_inodelog != sbp->sb_inopblog) || | |
266 | (sbp->sb_rextsize * sbp->sb_blocksize > XFS_MAX_RTEXTSIZE) || | |
267 | (sbp->sb_rextsize * sbp->sb_blocksize < XFS_MIN_RTEXTSIZE) || | |
268 | (sbp->sb_imax_pct > 100 /* zero sb_imax_pct is valid */) || | |
269 | sbp->sb_dblocks == 0 || | |
270 | sbp->sb_dblocks > XFS_MAX_DBLOCKS(sbp) || | |
271 | sbp->sb_dblocks < XFS_MIN_DBLOCKS(sbp))) { | |
272 | XFS_CORRUPTION_ERROR("SB sanity check failed", | |
273 | XFS_ERRLEVEL_LOW, mp, sbp); | |
274 | return XFS_ERROR(EFSCORRUPTED); | |
275 | } | |
276 | ||
277 | /* | |
278 | * Currently only very few inode sizes are supported. | |
279 | */ | |
280 | switch (sbp->sb_inodesize) { | |
281 | case 256: | |
282 | case 512: | |
283 | case 1024: | |
284 | case 2048: | |
285 | break; | |
286 | default: | |
287 | xfs_warn(mp, "inode size of %d bytes not supported", | |
288 | sbp->sb_inodesize); | |
289 | return XFS_ERROR(ENOSYS); | |
290 | } | |
291 | ||
4896e6c8 DC |
292 | if (xfs_sb_validate_fsb_count(sbp, sbp->sb_dblocks) || |
293 | xfs_sb_validate_fsb_count(sbp, sbp->sb_rblocks)) { | |
294 | xfs_warn(mp, | |
295 | "file system too large to be mounted on this system."); | |
296 | return XFS_ERROR(EFBIG); | |
297 | } | |
298 | ||
a2ceac1f DC |
299 | /* |
300 | * Version 1 directory format has never worked on Linux. | |
301 | */ | |
302 | if (unlikely(!xfs_sb_version_hasdirv2(sbp))) { | |
303 | xfs_warn(mp, "file system using version 1 directory format"); | |
304 | return XFS_ERROR(ENOSYS); | |
305 | } | |
306 | ||
307 | return 0; | |
308 | } | |
309 | ||
4896e6c8 DC |
310 | void |
311 | xfs_sb_quota_from_disk(struct xfs_sb *sbp) | |
312 | { | |
313 | /* | |
314 | * older mkfs doesn't initialize quota inodes to NULLFSINO. This | |
315 | * leads to in-core values having two different values for a quota | |
316 | * inode to be invalid: 0 and NULLFSINO. Change it to a single value | |
317 | * NULLFSINO. | |
318 | * | |
319 | * Note that this change affect only the in-core values. These | |
320 | * values are not written back to disk unless any quota information | |
321 | * is written to the disk. Even in that case, sb_pquotino field is | |
322 | * not written to disk unless the superblock supports pquotino. | |
323 | */ | |
324 | if (sbp->sb_uquotino == 0) | |
325 | sbp->sb_uquotino = NULLFSINO; | |
326 | if (sbp->sb_gquotino == 0) | |
327 | sbp->sb_gquotino = NULLFSINO; | |
328 | if (sbp->sb_pquotino == 0) | |
329 | sbp->sb_pquotino = NULLFSINO; | |
330 | ||
331 | /* | |
332 | * We need to do these manipilations only if we are working | |
333 | * with an older version of on-disk superblock. | |
334 | */ | |
335 | if (xfs_sb_version_has_pquotino(sbp)) | |
336 | return; | |
337 | ||
338 | if (sbp->sb_qflags & XFS_OQUOTA_ENFD) | |
339 | sbp->sb_qflags |= (sbp->sb_qflags & XFS_PQUOTA_ACCT) ? | |
340 | XFS_PQUOTA_ENFD : XFS_GQUOTA_ENFD; | |
341 | if (sbp->sb_qflags & XFS_OQUOTA_CHKD) | |
342 | sbp->sb_qflags |= (sbp->sb_qflags & XFS_PQUOTA_ACCT) ? | |
343 | XFS_PQUOTA_CHKD : XFS_GQUOTA_CHKD; | |
344 | sbp->sb_qflags &= ~(XFS_OQUOTA_ENFD | XFS_OQUOTA_CHKD); | |
345 | ||
346 | if (sbp->sb_qflags & XFS_PQUOTA_ACCT) { | |
347 | /* | |
348 | * In older version of superblock, on-disk superblock only | |
349 | * has sb_gquotino, and in-core superblock has both sb_gquotino | |
350 | * and sb_pquotino. But, only one of them is supported at any | |
351 | * point of time. So, if PQUOTA is set in disk superblock, | |
352 | * copy over sb_gquotino to sb_pquotino. | |
353 | */ | |
354 | sbp->sb_pquotino = sbp->sb_gquotino; | |
355 | sbp->sb_gquotino = NULLFSINO; | |
356 | } | |
357 | } | |
358 | ||
5e656dbb BN |
359 | void |
360 | xfs_sb_from_disk( | |
4896e6c8 | 361 | struct xfs_sb *to, |
5e656dbb BN |
362 | xfs_dsb_t *from) |
363 | { | |
364 | to->sb_magicnum = be32_to_cpu(from->sb_magicnum); | |
365 | to->sb_blocksize = be32_to_cpu(from->sb_blocksize); | |
366 | to->sb_dblocks = be64_to_cpu(from->sb_dblocks); | |
367 | to->sb_rblocks = be64_to_cpu(from->sb_rblocks); | |
368 | to->sb_rextents = be64_to_cpu(from->sb_rextents); | |
369 | memcpy(&to->sb_uuid, &from->sb_uuid, sizeof(to->sb_uuid)); | |
370 | to->sb_logstart = be64_to_cpu(from->sb_logstart); | |
371 | to->sb_rootino = be64_to_cpu(from->sb_rootino); | |
372 | to->sb_rbmino = be64_to_cpu(from->sb_rbmino); | |
373 | to->sb_rsumino = be64_to_cpu(from->sb_rsumino); | |
374 | to->sb_rextsize = be32_to_cpu(from->sb_rextsize); | |
375 | to->sb_agblocks = be32_to_cpu(from->sb_agblocks); | |
376 | to->sb_agcount = be32_to_cpu(from->sb_agcount); | |
377 | to->sb_rbmblocks = be32_to_cpu(from->sb_rbmblocks); | |
378 | to->sb_logblocks = be32_to_cpu(from->sb_logblocks); | |
379 | to->sb_versionnum = be16_to_cpu(from->sb_versionnum); | |
380 | to->sb_sectsize = be16_to_cpu(from->sb_sectsize); | |
381 | to->sb_inodesize = be16_to_cpu(from->sb_inodesize); | |
382 | to->sb_inopblock = be16_to_cpu(from->sb_inopblock); | |
383 | memcpy(&to->sb_fname, &from->sb_fname, sizeof(to->sb_fname)); | |
384 | to->sb_blocklog = from->sb_blocklog; | |
385 | to->sb_sectlog = from->sb_sectlog; | |
386 | to->sb_inodelog = from->sb_inodelog; | |
387 | to->sb_inopblog = from->sb_inopblog; | |
388 | to->sb_agblklog = from->sb_agblklog; | |
389 | to->sb_rextslog = from->sb_rextslog; | |
390 | to->sb_inprogress = from->sb_inprogress; | |
391 | to->sb_imax_pct = from->sb_imax_pct; | |
392 | to->sb_icount = be64_to_cpu(from->sb_icount); | |
393 | to->sb_ifree = be64_to_cpu(from->sb_ifree); | |
394 | to->sb_fdblocks = be64_to_cpu(from->sb_fdblocks); | |
395 | to->sb_frextents = be64_to_cpu(from->sb_frextents); | |
396 | to->sb_uquotino = be64_to_cpu(from->sb_uquotino); | |
397 | to->sb_gquotino = be64_to_cpu(from->sb_gquotino); | |
398 | to->sb_qflags = be16_to_cpu(from->sb_qflags); | |
399 | to->sb_flags = from->sb_flags; | |
400 | to->sb_shared_vn = from->sb_shared_vn; | |
401 | to->sb_inoalignmt = be32_to_cpu(from->sb_inoalignmt); | |
402 | to->sb_unit = be32_to_cpu(from->sb_unit); | |
403 | to->sb_width = be32_to_cpu(from->sb_width); | |
404 | to->sb_dirblklog = from->sb_dirblklog; | |
405 | to->sb_logsectlog = from->sb_logsectlog; | |
406 | to->sb_logsectsize = be16_to_cpu(from->sb_logsectsize); | |
407 | to->sb_logsunit = be32_to_cpu(from->sb_logsunit); | |
408 | to->sb_features2 = be32_to_cpu(from->sb_features2); | |
409 | to->sb_bad_features2 = be32_to_cpu(from->sb_bad_features2); | |
5565d79a DC |
410 | to->sb_features_compat = be32_to_cpu(from->sb_features_compat); |
411 | to->sb_features_ro_compat = be32_to_cpu(from->sb_features_ro_compat); | |
412 | to->sb_features_incompat = be32_to_cpu(from->sb_features_incompat); | |
6567f1f9 DC |
413 | to->sb_features_log_incompat = |
414 | be32_to_cpu(from->sb_features_log_incompat); | |
415 | to->sb_pad = 0; | |
5565d79a DC |
416 | to->sb_pquotino = be64_to_cpu(from->sb_pquotino); |
417 | to->sb_lsn = be64_to_cpu(from->sb_lsn); | |
5e656dbb BN |
418 | } |
419 | ||
342aef1e CS |
420 | static inline void |
421 | xfs_sb_quota_to_disk( | |
422 | xfs_dsb_t *to, | |
423 | xfs_sb_t *from, | |
424 | __int64_t *fields) | |
425 | { | |
426 | __uint16_t qflags = from->sb_qflags; | |
427 | ||
0340d706 CS |
428 | /* |
429 | * We need to do these manipilations only if we are working | |
430 | * with an older version of on-disk superblock. | |
431 | */ | |
432 | if (xfs_sb_version_has_pquotino(from)) | |
433 | return; | |
434 | ||
342aef1e CS |
435 | if (*fields & XFS_SB_QFLAGS) { |
436 | /* | |
437 | * The in-core version of sb_qflags do not have | |
438 | * XFS_OQUOTA_* flags, whereas the on-disk version | |
439 | * does. So, convert incore XFS_{PG}QUOTA_* flags | |
440 | * to on-disk XFS_OQUOTA_* flags. | |
441 | */ | |
442 | qflags &= ~(XFS_PQUOTA_ENFD | XFS_PQUOTA_CHKD | | |
443 | XFS_GQUOTA_ENFD | XFS_GQUOTA_CHKD); | |
444 | ||
445 | if (from->sb_qflags & | |
446 | (XFS_PQUOTA_ENFD | XFS_GQUOTA_ENFD)) | |
447 | qflags |= XFS_OQUOTA_ENFD; | |
448 | if (from->sb_qflags & | |
449 | (XFS_PQUOTA_CHKD | XFS_GQUOTA_CHKD)) | |
450 | qflags |= XFS_OQUOTA_CHKD; | |
451 | to->sb_qflags = cpu_to_be16(qflags); | |
452 | *fields &= ~XFS_SB_QFLAGS; | |
453 | } | |
0340d706 CS |
454 | |
455 | /* | |
456 | * GQUOTINO and PQUOTINO cannot be used together in versions | |
457 | * of superblock that do not have pquotino. from->sb_flags | |
458 | * tells us which quota is active and should be copied to | |
459 | * disk. | |
460 | */ | |
461 | if ((*fields & XFS_SB_GQUOTINO) && | |
462 | (from->sb_qflags & XFS_GQUOTA_ACCT)) | |
463 | to->sb_gquotino = cpu_to_be64(from->sb_gquotino); | |
464 | else if ((*fields & XFS_SB_PQUOTINO) && | |
465 | (from->sb_qflags & XFS_PQUOTA_ACCT)) | |
466 | to->sb_gquotino = cpu_to_be64(from->sb_pquotino); | |
467 | ||
468 | *fields &= ~(XFS_SB_PQUOTINO | XFS_SB_GQUOTINO); | |
342aef1e CS |
469 | } |
470 | ||
5e656dbb BN |
471 | /* |
472 | * Copy in core superblock to ondisk one. | |
473 | * | |
474 | * The fields argument is mask of superblock fields to copy. | |
475 | */ | |
476 | void | |
477 | xfs_sb_to_disk( | |
478 | xfs_dsb_t *to, | |
479 | xfs_sb_t *from, | |
480 | __int64_t fields) | |
481 | { | |
482 | xfs_caddr_t to_ptr = (xfs_caddr_t)to; | |
483 | xfs_caddr_t from_ptr = (xfs_caddr_t)from; | |
484 | xfs_sb_field_t f; | |
485 | int first; | |
486 | int size; | |
487 | ||
488 | ASSERT(fields); | |
489 | if (!fields) | |
490 | return; | |
491 | ||
342aef1e | 492 | xfs_sb_quota_to_disk(to, from, &fields); |
5e656dbb BN |
493 | while (fields) { |
494 | f = (xfs_sb_field_t)xfs_lowbit64((__uint64_t)fields); | |
495 | first = xfs_sb_info[f].offset; | |
496 | size = xfs_sb_info[f + 1].offset - first; | |
497 | ||
498 | ASSERT(xfs_sb_info[f].type == 0 || xfs_sb_info[f].type == 1); | |
499 | ||
500 | if (size == 1 || xfs_sb_info[f].type == 1) { | |
501 | memcpy(to_ptr + first, from_ptr + first, size); | |
502 | } else { | |
503 | switch (size) { | |
504 | case 2: | |
505 | *(__be16 *)(to_ptr + first) = | |
4896e6c8 | 506 | cpu_to_be16(*(__u16 *)(from_ptr + first)); |
5e656dbb BN |
507 | break; |
508 | case 4: | |
509 | *(__be32 *)(to_ptr + first) = | |
4896e6c8 | 510 | cpu_to_be32(*(__u32 *)(from_ptr + first)); |
5e656dbb BN |
511 | break; |
512 | case 8: | |
513 | *(__be64 *)(to_ptr + first) = | |
4896e6c8 | 514 | cpu_to_be64(*(__u64 *)(from_ptr + first)); |
5e656dbb BN |
515 | break; |
516 | default: | |
517 | ASSERT(0); | |
518 | } | |
519 | } | |
520 | ||
521 | fields &= ~(1LL << f); | |
522 | } | |
523 | } | |
524 | ||
5565d79a | 525 | static int |
a2ceac1f | 526 | xfs_sb_verify( |
f7b80291 | 527 | struct xfs_buf *bp, |
5629f836 | 528 | bool check_version) |
a2ceac1f DC |
529 | { |
530 | struct xfs_mount *mp = bp->b_target->bt_mount; | |
531 | struct xfs_sb sb; | |
a2ceac1f DC |
532 | |
533 | xfs_sb_from_disk(&sb, XFS_BUF_TO_SBP(bp)); | |
534 | ||
535 | /* | |
536 | * Only check the in progress field for the primary superblock as | |
537 | * mkfs.xfs doesn't clear it from secondary superblocks. | |
538 | */ | |
5629f836 DC |
539 | return xfs_mount_validate_sb(mp, &sb, bp->b_bn == XFS_SB_DADDR, |
540 | check_version); | |
a2ceac1f DC |
541 | } |
542 | ||
5565d79a DC |
543 | /* |
544 | * If the superblock has the CRC feature bit set or the CRC field is non-null, | |
545 | * check that the CRC is valid. We check the CRC field is non-null because a | |
546 | * single bit error could clear the feature bit and unused parts of the | |
547 | * superblock are supposed to be zero. Hence a non-null crc field indicates that | |
548 | * we've potentially lost a feature bit and we should check it anyway. | |
549 | */ | |
a2ceac1f DC |
550 | static void |
551 | xfs_sb_read_verify( | |
552 | struct xfs_buf *bp) | |
553 | { | |
5565d79a DC |
554 | struct xfs_mount *mp = bp->b_target->bt_mount; |
555 | struct xfs_dsb *dsb = XFS_BUF_TO_SBP(bp); | |
556 | int error; | |
557 | ||
558 | /* | |
559 | * open code the version check to avoid needing to convert the entire | |
560 | * superblock from disk order just to check the version number | |
561 | */ | |
562 | if (dsb->sb_magicnum == cpu_to_be32(XFS_SB_MAGIC) && | |
563 | (((be16_to_cpu(dsb->sb_versionnum) & XFS_SB_VERSION_NUMBITS) == | |
564 | XFS_SB_VERSION_5) || | |
565 | dsb->sb_crc != 0)) { | |
566 | ||
567 | if (!xfs_verify_cksum(bp->b_addr, be16_to_cpu(dsb->sb_sectsize), | |
568 | offsetof(struct xfs_sb, sb_crc))) { | |
569 | error = EFSCORRUPTED; | |
570 | goto out_error; | |
571 | } | |
572 | } | |
f7b80291 | 573 | error = xfs_sb_verify(bp, true); |
5565d79a DC |
574 | |
575 | out_error: | |
576 | if (error) { | |
4896e6c8 DC |
577 | XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, |
578 | mp, bp->b_addr); | |
5565d79a DC |
579 | xfs_buf_ioerror(bp, error); |
580 | } | |
a2ceac1f DC |
581 | } |
582 | ||
583 | /* | |
584 | * We may be probed for a filesystem match, so we may not want to emit | |
585 | * messages when the superblock buffer is not actually an XFS superblock. | |
4896e6c8 | 586 | * If we find an XFS superblock, then run a normal, noisy mount because we are |
a2ceac1f DC |
587 | * really going to mount it and want to know about errors. |
588 | */ | |
589 | static void | |
590 | xfs_sb_quiet_read_verify( | |
591 | struct xfs_buf *bp) | |
592 | { | |
5565d79a | 593 | struct xfs_dsb *dsb = XFS_BUF_TO_SBP(bp); |
a2ceac1f | 594 | |
a2ceac1f | 595 | |
5565d79a | 596 | if (dsb->sb_magicnum == cpu_to_be32(XFS_SB_MAGIC)) { |
a2ceac1f DC |
597 | /* XFS filesystem, verify noisily! */ |
598 | xfs_sb_read_verify(bp); | |
599 | return; | |
600 | } | |
601 | /* quietly fail */ | |
49f693fa | 602 | xfs_buf_ioerror(bp, EWRONGFS); |
a2ceac1f DC |
603 | } |
604 | ||
605 | static void | |
606 | xfs_sb_write_verify( | |
5565d79a | 607 | struct xfs_buf *bp) |
a2ceac1f | 608 | { |
5565d79a DC |
609 | struct xfs_mount *mp = bp->b_target->bt_mount; |
610 | struct xfs_buf_log_item *bip = bp->b_fspriv; | |
611 | int error; | |
612 | ||
f7b80291 | 613 | error = xfs_sb_verify(bp, false); |
5565d79a | 614 | if (error) { |
4896e6c8 DC |
615 | XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, |
616 | mp, bp->b_addr); | |
5565d79a DC |
617 | xfs_buf_ioerror(bp, error); |
618 | return; | |
619 | } | |
620 | ||
621 | if (!xfs_sb_version_hascrc(&mp->m_sb)) | |
622 | return; | |
623 | ||
624 | if (bip) | |
625 | XFS_BUF_TO_SBP(bp)->sb_lsn = cpu_to_be64(bip->bli_item.li_lsn); | |
626 | ||
627 | xfs_update_cksum(bp->b_addr, BBTOB(bp->b_length), | |
628 | offsetof(struct xfs_sb, sb_crc)); | |
a2ceac1f DC |
629 | } |
630 | ||
631 | const struct xfs_buf_ops xfs_sb_buf_ops = { | |
632 | .verify_read = xfs_sb_read_verify, | |
633 | .verify_write = xfs_sb_write_verify, | |
634 | }; | |
635 | ||
4896e6c8 | 636 | const struct xfs_buf_ops xfs_sb_quiet_buf_ops = { |
a2ceac1f DC |
637 | .verify_read = xfs_sb_quiet_read_verify, |
638 | .verify_write = xfs_sb_write_verify, | |
639 | }; | |
640 | ||
5e656dbb BN |
641 | /* |
642 | * xfs_mount_common | |
643 | * | |
644 | * Mount initialization code establishing various mount | |
645 | * fields from the superblock associated with the given | |
646 | * mount structure | |
5e656dbb BN |
647 | */ |
648 | void | |
4896e6c8 DC |
649 | xfs_sb_mount_common( |
650 | struct xfs_mount *mp, | |
651 | struct xfs_sb *sbp) | |
5e656dbb | 652 | { |
5e656dbb BN |
653 | mp->m_agfrotor = mp->m_agirotor = 0; |
654 | spin_lock_init(&mp->m_agirotor_lock); | |
655 | mp->m_maxagi = mp->m_sb.sb_agcount; | |
656 | mp->m_blkbit_log = sbp->sb_blocklog + XFS_NBBYLOG; | |
657 | mp->m_blkbb_log = sbp->sb_blocklog - BBSHIFT; | |
658 | mp->m_sectbb_log = sbp->sb_sectlog - BBSHIFT; | |
659 | mp->m_agno_log = xfs_highbit32(sbp->sb_agcount - 1) + 1; | |
660 | mp->m_agino_log = sbp->sb_inopblog + sbp->sb_agblklog; | |
5e656dbb BN |
661 | mp->m_blockmask = sbp->sb_blocksize - 1; |
662 | mp->m_blockwsize = sbp->sb_blocksize >> XFS_WORDLOG; | |
663 | mp->m_blockwmask = mp->m_blockwsize - 1; | |
5e656dbb | 664 | |
b3563c19 BN |
665 | mp->m_alloc_mxr[0] = xfs_allocbt_maxrecs(mp, sbp->sb_blocksize, 1); |
666 | mp->m_alloc_mxr[1] = xfs_allocbt_maxrecs(mp, sbp->sb_blocksize, 0); | |
667 | mp->m_alloc_mnr[0] = mp->m_alloc_mxr[0] / 2; | |
668 | mp->m_alloc_mnr[1] = mp->m_alloc_mxr[1] / 2; | |
669 | ||
670 | mp->m_inobt_mxr[0] = xfs_inobt_maxrecs(mp, sbp->sb_blocksize, 1); | |
671 | mp->m_inobt_mxr[1] = xfs_inobt_maxrecs(mp, sbp->sb_blocksize, 0); | |
672 | mp->m_inobt_mnr[0] = mp->m_inobt_mxr[0] / 2; | |
673 | mp->m_inobt_mnr[1] = mp->m_inobt_mxr[1] / 2; | |
674 | ||
675 | mp->m_bmap_dmxr[0] = xfs_bmbt_maxrecs(mp, sbp->sb_blocksize, 1); | |
676 | mp->m_bmap_dmxr[1] = xfs_bmbt_maxrecs(mp, sbp->sb_blocksize, 0); | |
677 | mp->m_bmap_dmnr[0] = mp->m_bmap_dmxr[0] / 2; | |
678 | mp->m_bmap_dmnr[1] = mp->m_bmap_dmxr[1] / 2; | |
5e656dbb BN |
679 | |
680 | mp->m_bsize = XFS_FSB_TO_BB(mp, 1); | |
681 | mp->m_ialloc_inos = (int)MAX((__uint16_t)XFS_INODES_PER_CHUNK, | |
682 | sbp->sb_inopblock); | |
683 | mp->m_ialloc_blks = mp->m_ialloc_inos >> sbp->sb_inopblog; | |
684 | } | |
685 | ||
cdded3d8 DC |
686 | /* |
687 | * xfs_initialize_perag_data | |
688 | * | |
689 | * Read in each per-ag structure so we can count up the number of | |
690 | * allocated inodes, free inodes and used filesystem blocks as this | |
691 | * information is no longer persistent in the superblock. Once we have | |
692 | * this information, write it into the in-core superblock structure. | |
693 | */ | |
5e656dbb | 694 | int |
4896e6c8 DC |
695 | xfs_initialize_perag_data( |
696 | struct xfs_mount *mp, | |
697 | xfs_agnumber_t agcount) | |
cdded3d8 DC |
698 | { |
699 | xfs_agnumber_t index; | |
700 | xfs_perag_t *pag; | |
701 | xfs_sb_t *sbp = &mp->m_sb; | |
5e656dbb BN |
702 | uint64_t ifree = 0; |
703 | uint64_t ialloc = 0; | |
704 | uint64_t bfree = 0; | |
705 | uint64_t bfreelst = 0; | |
706 | uint64_t btree = 0; | |
cdded3d8 | 707 | int error; |
cdded3d8 DC |
708 | |
709 | for (index = 0; index < agcount; index++) { | |
710 | /* | |
711 | * read the agf, then the agi. This gets us | |
56b2de80 | 712 | * all the information we need and populates the |
cdded3d8 DC |
713 | * per-ag structures for us. |
714 | */ | |
715 | error = xfs_alloc_pagf_init(mp, NULL, index, 0); | |
716 | if (error) | |
717 | return error; | |
718 | ||
719 | error = xfs_ialloc_pagi_init(mp, NULL, index); | |
720 | if (error) | |
721 | return error; | |
56b2de80 | 722 | pag = xfs_perag_get(mp, index); |
cdded3d8 DC |
723 | ifree += pag->pagi_freecount; |
724 | ialloc += pag->pagi_count; | |
725 | bfree += pag->pagf_freeblks; | |
726 | bfreelst += pag->pagf_flcount; | |
727 | btree += pag->pagf_btreeblks; | |
56b2de80 | 728 | xfs_perag_put(pag); |
cdded3d8 DC |
729 | } |
730 | /* | |
731 | * Overwrite incore superblock counters with just-read data | |
732 | */ | |
5e656dbb | 733 | spin_lock(&mp->m_sb_lock); |
cdded3d8 DC |
734 | sbp->sb_ifree = ifree; |
735 | sbp->sb_icount = ialloc; | |
736 | sbp->sb_fdblocks = bfree + bfreelst + btree; | |
5e656dbb BN |
737 | spin_unlock(&mp->m_sb_lock); |
738 | ||
739 | /* Fixup the per-cpu counters as well. */ | |
740 | xfs_icsb_reinit_counters(mp); | |
741 | ||
cdded3d8 DC |
742 | return 0; |
743 | } | |
5e656dbb BN |
744 | |
745 | /* | |
746 | * xfs_mod_sb() can be used to copy arbitrary changes to the | |
747 | * in-core superblock into the superblock buffer to be logged. | |
748 | * It does not provide the higher level of locking that is | |
749 | * needed to protect the in-core superblock from concurrent | |
750 | * access. | |
751 | */ | |
752 | void | |
753 | xfs_mod_sb(xfs_trans_t *tp, __int64_t fields) | |
754 | { | |
755 | xfs_buf_t *bp; | |
756 | int first; | |
757 | int last; | |
758 | xfs_mount_t *mp; | |
759 | xfs_sb_field_t f; | |
760 | ||
761 | ASSERT(fields); | |
762 | if (!fields) | |
763 | return; | |
764 | mp = tp->t_mountp; | |
765 | bp = xfs_trans_getsb(tp, mp, 0); | |
766 | first = sizeof(xfs_sb_t); | |
767 | last = 0; | |
768 | ||
769 | /* translate/copy */ | |
4896e6c8 | 770 | |
5e656dbb BN |
771 | xfs_sb_to_disk(XFS_BUF_TO_SBP(bp), &mp->m_sb, fields); |
772 | ||
773 | /* find modified range */ | |
56b2de80 DC |
774 | f = (xfs_sb_field_t)xfs_highbit64((__uint64_t)fields); |
775 | ASSERT((1LL << f) & XFS_SB_MOD_BITS); | |
776 | last = xfs_sb_info[f + 1].offset - 1; | |
5e656dbb BN |
777 | |
778 | f = (xfs_sb_field_t)xfs_lowbit64((__uint64_t)fields); | |
779 | ASSERT((1LL << f) & XFS_SB_MOD_BITS); | |
780 | first = xfs_sb_info[f].offset; | |
781 | ||
5565d79a | 782 | xfs_trans_buf_set_type(tp, bp, XFS_BLFT_SB_BUF); |
5e656dbb BN |
783 | xfs_trans_log_buf(tp, bp, first, last); |
784 | } |