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37b3b4d6 | 1 | // SPDX-License-Identifier: GPL-2.0 |
2bd0ea18 | 2 | /* |
5e656dbb | 3 | * Copyright (c) 2000-2005 Silicon Graphics, Inc. |
da23017d | 4 | * All Rights Reserved. |
2bd0ea18 | 5 | */ |
9c799827 | 6 | #include "libxfs_priv.h" |
b626fb59 DC |
7 | #include "xfs_fs.h" |
8 | #include "xfs_shared.h" | |
9 | #include "xfs_format.h" | |
10 | #include "xfs_log_format.h" | |
11 | #include "xfs_trans_resv.h" | |
12 | #include "xfs_bit.h" | |
13 | #include "xfs_sb.h" | |
14 | #include "xfs_mount.h" | |
f944d3d0 | 15 | #include "xfs_defer.h" |
b626fb59 DC |
16 | #include "xfs_inode.h" |
17 | #include "xfs_ialloc.h" | |
18 | #include "xfs_alloc.h" | |
19 | #include "xfs_trace.h" | |
20 | #include "xfs_cksum.h" | |
21 | #include "xfs_trans.h" | |
22 | #include "xfs_bmap_btree.h" | |
23 | #include "xfs_alloc_btree.h" | |
24 | #include "xfs_ialloc_btree.h" | |
b3a96b46 | 25 | #include "xfs_rmap_btree.h" |
d8079fe0 DW |
26 | #include "xfs_bmap.h" |
27 | #include "xfs_refcount_btree.h" | |
a2a52384 DW |
28 | #include "xfs_da_format.h" |
29 | #include "xfs_da_btree.h" | |
2bd0ea18 | 30 | |
4896e6c8 DC |
31 | /* |
32 | * Physical superblock buffer manipulations. Shared with libxfs in userspace. | |
33 | */ | |
34 | ||
56b2de80 DC |
35 | /* |
36 | * Reference counting access wrappers to the perag structures. | |
37 | * Because we never free per-ag structures, the only thing we | |
38 | * have to protect against changes is the tree structure itself. | |
39 | */ | |
40 | struct xfs_perag * | |
4896e6c8 DC |
41 | xfs_perag_get( |
42 | struct xfs_mount *mp, | |
43 | xfs_agnumber_t agno) | |
a33a9e62 | 44 | { |
56b2de80 DC |
45 | struct xfs_perag *pag; |
46 | int ref = 0; | |
47 | ||
48 | rcu_read_lock(); | |
49 | pag = radix_tree_lookup(&mp->m_perag_tree, agno); | |
50 | if (pag) { | |
51 | ASSERT(atomic_read(&pag->pag_ref) >= 0); | |
52 | ref = atomic_inc_return(&pag->pag_ref); | |
a33a9e62 | 53 | } |
56b2de80 | 54 | rcu_read_unlock(); |
a2ceac1f | 55 | trace_xfs_perag_get(mp, agno, ref, _RET_IP_); |
56b2de80 DC |
56 | return pag; |
57 | } | |
a33a9e62 | 58 | |
4896e6c8 DC |
59 | /* |
60 | * search from @first to find the next perag with the given tag set. | |
61 | */ | |
62 | struct xfs_perag * | |
63 | xfs_perag_get_tag( | |
64 | struct xfs_mount *mp, | |
65 | xfs_agnumber_t first, | |
66 | int tag) | |
67 | { | |
68 | struct xfs_perag *pag; | |
69 | int found; | |
70 | int ref; | |
71 | ||
72 | rcu_read_lock(); | |
73 | found = radix_tree_gang_lookup_tag(&mp->m_perag_tree, | |
74 | (void **)&pag, first, 1, tag); | |
75 | if (found <= 0) { | |
76 | rcu_read_unlock(); | |
77 | return NULL; | |
78 | } | |
79 | ref = atomic_inc_return(&pag->pag_ref); | |
80 | rcu_read_unlock(); | |
81 | trace_xfs_perag_get_tag(mp, pag->pag_agno, ref, _RET_IP_); | |
82 | return pag; | |
83 | } | |
84 | ||
56b2de80 | 85 | void |
4896e6c8 DC |
86 | xfs_perag_put( |
87 | struct xfs_perag *pag) | |
56b2de80 DC |
88 | { |
89 | int ref; | |
a33a9e62 | 90 | |
56b2de80 DC |
91 | ASSERT(atomic_read(&pag->pag_ref) > 0); |
92 | ref = atomic_dec_return(&pag->pag_ref); | |
93 | trace_xfs_perag_put(pag->pag_mount, pag->pag_agno, ref, _RET_IP_); | |
a33a9e62 | 94 | } |
cdded3d8 | 95 | |
a2ceac1f DC |
96 | /* |
97 | * Check the validity of the SB found. | |
98 | */ | |
99 | STATIC int | |
100 | xfs_mount_validate_sb( | |
101 | xfs_mount_t *mp, | |
102 | xfs_sb_t *sbp, | |
5629f836 DC |
103 | bool check_inprogress, |
104 | bool check_version) | |
a2ceac1f | 105 | { |
e91df844 DW |
106 | uint32_t agcount = 0; |
107 | uint32_t rem; | |
108 | ||
a2ceac1f DC |
109 | if (sbp->sb_magicnum != XFS_SB_MAGIC) { |
110 | xfs_warn(mp, "bad magic number"); | |
12b53197 | 111 | return -EWRONGFS; |
a2ceac1f DC |
112 | } |
113 | ||
5565d79a | 114 | |
a2ceac1f DC |
115 | if (!xfs_sb_good_version(sbp)) { |
116 | xfs_warn(mp, "bad version"); | |
12b53197 | 117 | return -EWRONGFS; |
a2ceac1f DC |
118 | } |
119 | ||
5565d79a | 120 | /* |
6567f1f9 | 121 | * Version 5 superblock feature mask validation. Reject combinations the |
4896e6c8 DC |
122 | * kernel cannot support up front before checking anything else. For |
123 | * write validation, we don't need to check feature masks. | |
5565d79a | 124 | */ |
5629f836 | 125 | if (check_version && XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) { |
6567f1f9 DC |
126 | if (xfs_sb_has_compat_feature(sbp, |
127 | XFS_SB_FEAT_COMPAT_UNKNOWN)) { | |
128 | xfs_warn(mp, | |
2c2ec8ff | 129 | "Superblock has unknown compatible features (0x%x) enabled.", |
6567f1f9 DC |
130 | (sbp->sb_features_compat & |
131 | XFS_SB_FEAT_COMPAT_UNKNOWN)); | |
2c2ec8ff JP |
132 | xfs_warn(mp, |
133 | "Using a more recent kernel is recommended."); | |
6567f1f9 DC |
134 | } |
135 | ||
136 | if (xfs_sb_has_ro_compat_feature(sbp, | |
137 | XFS_SB_FEAT_RO_COMPAT_UNKNOWN)) { | |
ff105f75 DC |
138 | xfs_alert(mp, |
139 | "Superblock has unknown read-only compatible features (0x%x) enabled.", | |
6567f1f9 DC |
140 | (sbp->sb_features_ro_compat & |
141 | XFS_SB_FEAT_RO_COMPAT_UNKNOWN)); | |
ff105f75 DC |
142 | if (!(mp->m_flags & XFS_MOUNT_RDONLY)) { |
143 | xfs_warn(mp, | |
2c2ec8ff JP |
144 | "Attempted to mount read-only compatible filesystem read-write."); |
145 | xfs_warn(mp, | |
ff105f75 | 146 | "Filesystem can only be safely mounted read only."); |
2c2ec8ff | 147 | |
12b53197 | 148 | return -EINVAL; |
ff105f75 | 149 | } |
6567f1f9 DC |
150 | } |
151 | if (xfs_sb_has_incompat_feature(sbp, | |
152 | XFS_SB_FEAT_INCOMPAT_UNKNOWN)) { | |
153 | xfs_warn(mp, | |
2c2ec8ff | 154 | "Superblock has unknown incompatible features (0x%x) enabled.", |
6567f1f9 DC |
155 | (sbp->sb_features_incompat & |
156 | XFS_SB_FEAT_INCOMPAT_UNKNOWN)); | |
2c2ec8ff JP |
157 | xfs_warn(mp, |
158 | "Filesystem can not be safely mounted by this kernel."); | |
12b53197 | 159 | return -EINVAL; |
6567f1f9 | 160 | } |
a65d8d29 BF |
161 | } else if (xfs_sb_version_hascrc(sbp)) { |
162 | /* | |
163 | * We can't read verify the sb LSN because the read verifier is | |
164 | * called before the log is allocated and processed. We know the | |
165 | * log is set up before write verifier (!check_version) calls, | |
166 | * so just check it here. | |
167 | */ | |
168 | if (!xfs_log_check_lsn(mp, sbp->sb_lsn)) | |
169 | return -EFSCORRUPTED; | |
5565d79a DC |
170 | } |
171 | ||
4896e6c8 DC |
172 | if (xfs_sb_version_has_pquotino(sbp)) { |
173 | if (sbp->sb_qflags & (XFS_OQUOTA_ENFD | XFS_OQUOTA_CHKD)) { | |
174 | xfs_notice(mp, | |
12864fd9 | 175 | "Version 5 of Super block has XFS_OQUOTA bits."); |
12b53197 | 176 | return -EFSCORRUPTED; |
4896e6c8 DC |
177 | } |
178 | } else if (sbp->sb_qflags & (XFS_PQUOTA_ENFD | XFS_GQUOTA_ENFD | | |
179 | XFS_PQUOTA_CHKD | XFS_GQUOTA_CHKD)) { | |
180 | xfs_notice(mp, | |
12864fd9 | 181 | "Superblock earlier than Version 5 has XFS_[PQ]UOTA_{ENFD|CHKD} bits."); |
12b53197 | 182 | return -EFSCORRUPTED; |
342aef1e CS |
183 | } |
184 | ||
7f5cd45d BF |
185 | /* |
186 | * Full inode chunks must be aligned to inode chunk size when | |
187 | * sparse inodes are enabled to support the sparse chunk | |
188 | * allocation algorithm and prevent overlapping inode records. | |
189 | */ | |
190 | if (xfs_sb_version_hassparseinodes(sbp)) { | |
191 | uint32_t align; | |
192 | ||
7f5cd45d BF |
193 | align = XFS_INODES_PER_CHUNK * sbp->sb_inodesize |
194 | >> sbp->sb_blocklog; | |
195 | if (sbp->sb_inoalignmt != align) { | |
196 | xfs_warn(mp, | |
197 | "Inode block alignment (%u) must match chunk size (%u) for sparse inodes.", | |
198 | sbp->sb_inoalignmt, align); | |
199 | return -EINVAL; | |
200 | } | |
201 | } | |
202 | ||
a2ceac1f | 203 | if (unlikely( |
6567f1f9 | 204 | sbp->sb_logstart == 0 && mp->m_logdev_targp == mp->m_ddev_targp)) { |
a2ceac1f DC |
205 | xfs_warn(mp, |
206 | "filesystem is marked as having an external log; " | |
207 | "specify logdev on the mount command line."); | |
12b53197 | 208 | return -EINVAL; |
a2ceac1f DC |
209 | } |
210 | ||
211 | if (unlikely( | |
6567f1f9 | 212 | sbp->sb_logstart != 0 && mp->m_logdev_targp != mp->m_ddev_targp)) { |
a2ceac1f DC |
213 | xfs_warn(mp, |
214 | "filesystem is marked as having an internal log; " | |
215 | "do not specify logdev on the mount command line."); | |
12b53197 | 216 | return -EINVAL; |
a2ceac1f DC |
217 | } |
218 | ||
e91df844 DW |
219 | /* Compute agcount for this number of dblocks and agblocks */ |
220 | if (sbp->sb_agblocks) { | |
221 | agcount = div_u64_rem(sbp->sb_dblocks, sbp->sb_agblocks, &rem); | |
222 | if (rem) | |
223 | agcount++; | |
224 | } | |
225 | ||
a2ceac1f DC |
226 | /* |
227 | * More sanity checking. Most of these were stolen directly from | |
228 | * xfs_repair. | |
229 | */ | |
230 | if (unlikely( | |
231 | sbp->sb_agcount <= 0 || | |
232 | sbp->sb_sectsize < XFS_MIN_SECTORSIZE || | |
233 | sbp->sb_sectsize > XFS_MAX_SECTORSIZE || | |
234 | sbp->sb_sectlog < XFS_MIN_SECTORSIZE_LOG || | |
235 | sbp->sb_sectlog > XFS_MAX_SECTORSIZE_LOG || | |
236 | sbp->sb_sectsize != (1 << sbp->sb_sectlog) || | |
237 | sbp->sb_blocksize < XFS_MIN_BLOCKSIZE || | |
238 | sbp->sb_blocksize > XFS_MAX_BLOCKSIZE || | |
239 | sbp->sb_blocklog < XFS_MIN_BLOCKSIZE_LOG || | |
240 | sbp->sb_blocklog > XFS_MAX_BLOCKSIZE_LOG || | |
241 | sbp->sb_blocksize != (1 << sbp->sb_blocklog) || | |
2e6fca28 | 242 | sbp->sb_dirblklog + sbp->sb_blocklog > XFS_MAX_BLOCKSIZE_LOG || |
a2ceac1f DC |
243 | sbp->sb_inodesize < XFS_DINODE_MIN_SIZE || |
244 | sbp->sb_inodesize > XFS_DINODE_MAX_SIZE || | |
245 | sbp->sb_inodelog < XFS_DINODE_MIN_LOG || | |
246 | sbp->sb_inodelog > XFS_DINODE_MAX_LOG || | |
247 | sbp->sb_inodesize != (1 << sbp->sb_inodelog) || | |
5a35bf2c | 248 | sbp->sb_logsunit > XLOG_MAX_RECORD_BSIZE || |
4b0c789d | 249 | sbp->sb_inopblock != howmany(sbp->sb_blocksize,sbp->sb_inodesize) || |
e91df844 DW |
250 | XFS_FSB_TO_B(mp, sbp->sb_agblocks) < XFS_MIN_AG_BYTES || |
251 | XFS_FSB_TO_B(mp, sbp->sb_agblocks) > XFS_MAX_AG_BYTES || | |
252 | sbp->sb_agblklog != xfs_highbit32(sbp->sb_agblocks - 1) + 1 || | |
253 | agcount == 0 || agcount != sbp->sb_agcount || | |
a2ceac1f DC |
254 | (sbp->sb_blocklog - sbp->sb_inodelog != sbp->sb_inopblog) || |
255 | (sbp->sb_rextsize * sbp->sb_blocksize > XFS_MAX_RTEXTSIZE) || | |
256 | (sbp->sb_rextsize * sbp->sb_blocksize < XFS_MIN_RTEXTSIZE) || | |
257 | (sbp->sb_imax_pct > 100 /* zero sb_imax_pct is valid */) || | |
258 | sbp->sb_dblocks == 0 || | |
259 | sbp->sb_dblocks > XFS_MAX_DBLOCKS(sbp) || | |
ff105f75 DC |
260 | sbp->sb_dblocks < XFS_MIN_DBLOCKS(sbp) || |
261 | sbp->sb_shared_vn != 0)) { | |
ba5027e0 | 262 | xfs_notice(mp, "SB sanity check failed"); |
12b53197 | 263 | return -EFSCORRUPTED; |
a2ceac1f DC |
264 | } |
265 | ||
595add55 DC |
266 | if (sbp->sb_unit) { |
267 | if (!xfs_sb_version_hasdalign(sbp) || | |
268 | sbp->sb_unit > sbp->sb_width || | |
269 | (sbp->sb_width % sbp->sb_unit) != 0) { | |
270 | xfs_notice(mp, "SB stripe unit sanity check failed"); | |
271 | return -EFSCORRUPTED; | |
272 | } | |
273 | } else if (xfs_sb_version_hasdalign(sbp)) { | |
274 | xfs_notice(mp, "SB stripe alignment sanity check failed"); | |
275 | return -EFSCORRUPTED; | |
276 | } else if (sbp->sb_width) { | |
277 | xfs_notice(mp, "SB stripe width sanity check failed"); | |
278 | return -EFSCORRUPTED; | |
279 | } | |
280 | ||
281 | ||
342ec632 DW |
282 | if (xfs_sb_version_hascrc(&mp->m_sb) && |
283 | sbp->sb_blocksize < XFS_MIN_CRC_BLOCKSIZE) { | |
284 | xfs_notice(mp, "v5 SB sanity check failed"); | |
285 | return -EFSCORRUPTED; | |
286 | } | |
287 | ||
a2ceac1f DC |
288 | /* |
289 | * Currently only very few inode sizes are supported. | |
290 | */ | |
291 | switch (sbp->sb_inodesize) { | |
292 | case 256: | |
293 | case 512: | |
294 | case 1024: | |
295 | case 2048: | |
296 | break; | |
297 | default: | |
298 | xfs_warn(mp, "inode size of %d bytes not supported", | |
299 | sbp->sb_inodesize); | |
12b53197 | 300 | return -ENOSYS; |
a2ceac1f DC |
301 | } |
302 | ||
4896e6c8 DC |
303 | if (xfs_sb_validate_fsb_count(sbp, sbp->sb_dblocks) || |
304 | xfs_sb_validate_fsb_count(sbp, sbp->sb_rblocks)) { | |
305 | xfs_warn(mp, | |
306 | "file system too large to be mounted on this system."); | |
12b53197 | 307 | return -EFBIG; |
4896e6c8 DC |
308 | } |
309 | ||
a2ceac1f DC |
310 | return 0; |
311 | } | |
312 | ||
4896e6c8 DC |
313 | void |
314 | xfs_sb_quota_from_disk(struct xfs_sb *sbp) | |
315 | { | |
316 | /* | |
317 | * older mkfs doesn't initialize quota inodes to NULLFSINO. This | |
318 | * leads to in-core values having two different values for a quota | |
319 | * inode to be invalid: 0 and NULLFSINO. Change it to a single value | |
320 | * NULLFSINO. | |
321 | * | |
322 | * Note that this change affect only the in-core values. These | |
323 | * values are not written back to disk unless any quota information | |
324 | * is written to the disk. Even in that case, sb_pquotino field is | |
325 | * not written to disk unless the superblock supports pquotino. | |
326 | */ | |
327 | if (sbp->sb_uquotino == 0) | |
328 | sbp->sb_uquotino = NULLFSINO; | |
329 | if (sbp->sb_gquotino == 0) | |
330 | sbp->sb_gquotino = NULLFSINO; | |
331 | if (sbp->sb_pquotino == 0) | |
332 | sbp->sb_pquotino = NULLFSINO; | |
333 | ||
334 | /* | |
335 | * We need to do these manipilations only if we are working | |
336 | * with an older version of on-disk superblock. | |
337 | */ | |
338 | if (xfs_sb_version_has_pquotino(sbp)) | |
339 | return; | |
340 | ||
341 | if (sbp->sb_qflags & XFS_OQUOTA_ENFD) | |
342 | sbp->sb_qflags |= (sbp->sb_qflags & XFS_PQUOTA_ACCT) ? | |
343 | XFS_PQUOTA_ENFD : XFS_GQUOTA_ENFD; | |
344 | if (sbp->sb_qflags & XFS_OQUOTA_CHKD) | |
345 | sbp->sb_qflags |= (sbp->sb_qflags & XFS_PQUOTA_ACCT) ? | |
346 | XFS_PQUOTA_CHKD : XFS_GQUOTA_CHKD; | |
347 | sbp->sb_qflags &= ~(XFS_OQUOTA_ENFD | XFS_OQUOTA_CHKD); | |
348 | ||
ee375425 ES |
349 | if (sbp->sb_qflags & XFS_PQUOTA_ACCT && |
350 | sbp->sb_gquotino != NULLFSINO) { | |
4896e6c8 DC |
351 | /* |
352 | * In older version of superblock, on-disk superblock only | |
353 | * has sb_gquotino, and in-core superblock has both sb_gquotino | |
354 | * and sb_pquotino. But, only one of them is supported at any | |
355 | * point of time. So, if PQUOTA is set in disk superblock, | |
ee375425 ES |
356 | * copy over sb_gquotino to sb_pquotino. The NULLFSINO test |
357 | * above is to make sure we don't do this twice and wipe them | |
358 | * both out! | |
4896e6c8 DC |
359 | */ |
360 | sbp->sb_pquotino = sbp->sb_gquotino; | |
361 | sbp->sb_gquotino = NULLFSINO; | |
362 | } | |
363 | } | |
364 | ||
5a35bf2c DC |
365 | static void |
366 | __xfs_sb_from_disk( | |
4896e6c8 | 367 | struct xfs_sb *to, |
5a35bf2c DC |
368 | xfs_dsb_t *from, |
369 | bool convert_xquota) | |
5e656dbb BN |
370 | { |
371 | to->sb_magicnum = be32_to_cpu(from->sb_magicnum); | |
372 | to->sb_blocksize = be32_to_cpu(from->sb_blocksize); | |
373 | to->sb_dblocks = be64_to_cpu(from->sb_dblocks); | |
374 | to->sb_rblocks = be64_to_cpu(from->sb_rblocks); | |
375 | to->sb_rextents = be64_to_cpu(from->sb_rextents); | |
376 | memcpy(&to->sb_uuid, &from->sb_uuid, sizeof(to->sb_uuid)); | |
377 | to->sb_logstart = be64_to_cpu(from->sb_logstart); | |
378 | to->sb_rootino = be64_to_cpu(from->sb_rootino); | |
379 | to->sb_rbmino = be64_to_cpu(from->sb_rbmino); | |
380 | to->sb_rsumino = be64_to_cpu(from->sb_rsumino); | |
381 | to->sb_rextsize = be32_to_cpu(from->sb_rextsize); | |
382 | to->sb_agblocks = be32_to_cpu(from->sb_agblocks); | |
383 | to->sb_agcount = be32_to_cpu(from->sb_agcount); | |
384 | to->sb_rbmblocks = be32_to_cpu(from->sb_rbmblocks); | |
385 | to->sb_logblocks = be32_to_cpu(from->sb_logblocks); | |
386 | to->sb_versionnum = be16_to_cpu(from->sb_versionnum); | |
387 | to->sb_sectsize = be16_to_cpu(from->sb_sectsize); | |
388 | to->sb_inodesize = be16_to_cpu(from->sb_inodesize); | |
389 | to->sb_inopblock = be16_to_cpu(from->sb_inopblock); | |
390 | memcpy(&to->sb_fname, &from->sb_fname, sizeof(to->sb_fname)); | |
391 | to->sb_blocklog = from->sb_blocklog; | |
392 | to->sb_sectlog = from->sb_sectlog; | |
393 | to->sb_inodelog = from->sb_inodelog; | |
394 | to->sb_inopblog = from->sb_inopblog; | |
395 | to->sb_agblklog = from->sb_agblklog; | |
396 | to->sb_rextslog = from->sb_rextslog; | |
397 | to->sb_inprogress = from->sb_inprogress; | |
398 | to->sb_imax_pct = from->sb_imax_pct; | |
399 | to->sb_icount = be64_to_cpu(from->sb_icount); | |
400 | to->sb_ifree = be64_to_cpu(from->sb_ifree); | |
401 | to->sb_fdblocks = be64_to_cpu(from->sb_fdblocks); | |
402 | to->sb_frextents = be64_to_cpu(from->sb_frextents); | |
403 | to->sb_uquotino = be64_to_cpu(from->sb_uquotino); | |
404 | to->sb_gquotino = be64_to_cpu(from->sb_gquotino); | |
405 | to->sb_qflags = be16_to_cpu(from->sb_qflags); | |
406 | to->sb_flags = from->sb_flags; | |
407 | to->sb_shared_vn = from->sb_shared_vn; | |
408 | to->sb_inoalignmt = be32_to_cpu(from->sb_inoalignmt); | |
409 | to->sb_unit = be32_to_cpu(from->sb_unit); | |
410 | to->sb_width = be32_to_cpu(from->sb_width); | |
411 | to->sb_dirblklog = from->sb_dirblklog; | |
412 | to->sb_logsectlog = from->sb_logsectlog; | |
413 | to->sb_logsectsize = be16_to_cpu(from->sb_logsectsize); | |
414 | to->sb_logsunit = be32_to_cpu(from->sb_logsunit); | |
415 | to->sb_features2 = be32_to_cpu(from->sb_features2); | |
416 | to->sb_bad_features2 = be32_to_cpu(from->sb_bad_features2); | |
5565d79a DC |
417 | to->sb_features_compat = be32_to_cpu(from->sb_features_compat); |
418 | to->sb_features_ro_compat = be32_to_cpu(from->sb_features_ro_compat); | |
419 | to->sb_features_incompat = be32_to_cpu(from->sb_features_incompat); | |
6567f1f9 DC |
420 | to->sb_features_log_incompat = |
421 | be32_to_cpu(from->sb_features_log_incompat); | |
5a35bf2c DC |
422 | /* crc is only used on disk, not in memory; just init to 0 here. */ |
423 | to->sb_crc = 0; | |
6bd8b7e1 | 424 | to->sb_spino_align = be32_to_cpu(from->sb_spino_align); |
5565d79a DC |
425 | to->sb_pquotino = be64_to_cpu(from->sb_pquotino); |
426 | to->sb_lsn = be64_to_cpu(from->sb_lsn); | |
9c4e12fb ES |
427 | /* |
428 | * sb_meta_uuid is only on disk if it differs from sb_uuid and the | |
429 | * feature flag is set; if not set we keep it only in memory. | |
430 | */ | |
431 | if (xfs_sb_version_hasmetauuid(to)) | |
432 | uuid_copy(&to->sb_meta_uuid, &from->sb_meta_uuid); | |
433 | else | |
434 | uuid_copy(&to->sb_meta_uuid, &from->sb_uuid); | |
5a35bf2c DC |
435 | /* Convert on-disk flags to in-memory flags? */ |
436 | if (convert_xquota) | |
437 | xfs_sb_quota_from_disk(to); | |
438 | } | |
439 | ||
440 | void | |
441 | xfs_sb_from_disk( | |
442 | struct xfs_sb *to, | |
443 | xfs_dsb_t *from) | |
444 | { | |
445 | __xfs_sb_from_disk(to, from, true); | |
5e656dbb BN |
446 | } |
447 | ||
19ebedcf | 448 | static void |
342aef1e | 449 | xfs_sb_quota_to_disk( |
19ebedcf DC |
450 | struct xfs_dsb *to, |
451 | struct xfs_sb *from) | |
342aef1e | 452 | { |
4a492e72 | 453 | uint16_t qflags = from->sb_qflags; |
342aef1e | 454 | |
19ebedcf DC |
455 | to->sb_uquotino = cpu_to_be64(from->sb_uquotino); |
456 | if (xfs_sb_version_has_pquotino(from)) { | |
457 | to->sb_qflags = cpu_to_be16(from->sb_qflags); | |
458 | to->sb_gquotino = cpu_to_be64(from->sb_gquotino); | |
459 | to->sb_pquotino = cpu_to_be64(from->sb_pquotino); | |
460 | return; | |
461 | } | |
462 | ||
0340d706 | 463 | /* |
19ebedcf DC |
464 | * The in-core version of sb_qflags do not have XFS_OQUOTA_* |
465 | * flags, whereas the on-disk version does. So, convert incore | |
466 | * XFS_{PG}QUOTA_* flags to on-disk XFS_OQUOTA_* flags. | |
0340d706 | 467 | */ |
19ebedcf DC |
468 | qflags &= ~(XFS_PQUOTA_ENFD | XFS_PQUOTA_CHKD | |
469 | XFS_GQUOTA_ENFD | XFS_GQUOTA_CHKD); | |
0340d706 | 470 | |
19ebedcf DC |
471 | if (from->sb_qflags & |
472 | (XFS_PQUOTA_ENFD | XFS_GQUOTA_ENFD)) | |
473 | qflags |= XFS_OQUOTA_ENFD; | |
474 | if (from->sb_qflags & | |
475 | (XFS_PQUOTA_CHKD | XFS_GQUOTA_CHKD)) | |
476 | qflags |= XFS_OQUOTA_CHKD; | |
477 | to->sb_qflags = cpu_to_be16(qflags); | |
0340d706 CS |
478 | |
479 | /* | |
19ebedcf DC |
480 | * GQUOTINO and PQUOTINO cannot be used together in versions |
481 | * of superblock that do not have pquotino. from->sb_flags | |
482 | * tells us which quota is active and should be copied to | |
483 | * disk. If neither are active, we should NULL the inode. | |
ff105f75 | 484 | * |
19ebedcf DC |
485 | * In all cases, the separate pquotino must remain 0 because it |
486 | * it beyond the "end" of the valid non-pquotino superblock. | |
0340d706 | 487 | */ |
19ebedcf | 488 | if (from->sb_qflags & XFS_GQUOTA_ACCT) |
0340d706 | 489 | to->sb_gquotino = cpu_to_be64(from->sb_gquotino); |
19ebedcf | 490 | else if (from->sb_qflags & XFS_PQUOTA_ACCT) |
0340d706 | 491 | to->sb_gquotino = cpu_to_be64(from->sb_pquotino); |
ff105f75 DC |
492 | else { |
493 | /* | |
494 | * We can't rely on just the fields being logged to tell us | |
495 | * that it is safe to write NULLFSINO - we should only do that | |
496 | * if quotas are not actually enabled. Hence only write | |
497 | * NULLFSINO if both in-core quota inodes are NULL. | |
498 | */ | |
499 | if (from->sb_gquotino == NULLFSINO && | |
500 | from->sb_pquotino == NULLFSINO) | |
501 | to->sb_gquotino = cpu_to_be64(NULLFSINO); | |
502 | } | |
0340d706 | 503 | |
19ebedcf | 504 | to->sb_pquotino = 0; |
342aef1e CS |
505 | } |
506 | ||
5e656dbb BN |
507 | void |
508 | xfs_sb_to_disk( | |
19ebedcf DC |
509 | struct xfs_dsb *to, |
510 | struct xfs_sb *from) | |
5e656dbb | 511 | { |
19ebedcf | 512 | xfs_sb_quota_to_disk(to, from); |
5e656dbb | 513 | |
19ebedcf DC |
514 | to->sb_magicnum = cpu_to_be32(from->sb_magicnum); |
515 | to->sb_blocksize = cpu_to_be32(from->sb_blocksize); | |
516 | to->sb_dblocks = cpu_to_be64(from->sb_dblocks); | |
517 | to->sb_rblocks = cpu_to_be64(from->sb_rblocks); | |
518 | to->sb_rextents = cpu_to_be64(from->sb_rextents); | |
519 | memcpy(&to->sb_uuid, &from->sb_uuid, sizeof(to->sb_uuid)); | |
520 | to->sb_logstart = cpu_to_be64(from->sb_logstart); | |
521 | to->sb_rootino = cpu_to_be64(from->sb_rootino); | |
522 | to->sb_rbmino = cpu_to_be64(from->sb_rbmino); | |
523 | to->sb_rsumino = cpu_to_be64(from->sb_rsumino); | |
524 | to->sb_rextsize = cpu_to_be32(from->sb_rextsize); | |
525 | to->sb_agblocks = cpu_to_be32(from->sb_agblocks); | |
526 | to->sb_agcount = cpu_to_be32(from->sb_agcount); | |
527 | to->sb_rbmblocks = cpu_to_be32(from->sb_rbmblocks); | |
528 | to->sb_logblocks = cpu_to_be32(from->sb_logblocks); | |
529 | to->sb_versionnum = cpu_to_be16(from->sb_versionnum); | |
530 | to->sb_sectsize = cpu_to_be16(from->sb_sectsize); | |
531 | to->sb_inodesize = cpu_to_be16(from->sb_inodesize); | |
532 | to->sb_inopblock = cpu_to_be16(from->sb_inopblock); | |
533 | memcpy(&to->sb_fname, &from->sb_fname, sizeof(to->sb_fname)); | |
534 | to->sb_blocklog = from->sb_blocklog; | |
535 | to->sb_sectlog = from->sb_sectlog; | |
536 | to->sb_inodelog = from->sb_inodelog; | |
537 | to->sb_inopblog = from->sb_inopblog; | |
538 | to->sb_agblklog = from->sb_agblklog; | |
539 | to->sb_rextslog = from->sb_rextslog; | |
540 | to->sb_inprogress = from->sb_inprogress; | |
541 | to->sb_imax_pct = from->sb_imax_pct; | |
542 | to->sb_icount = cpu_to_be64(from->sb_icount); | |
543 | to->sb_ifree = cpu_to_be64(from->sb_ifree); | |
544 | to->sb_fdblocks = cpu_to_be64(from->sb_fdblocks); | |
545 | to->sb_frextents = cpu_to_be64(from->sb_frextents); | |
546 | ||
547 | to->sb_flags = from->sb_flags; | |
548 | to->sb_shared_vn = from->sb_shared_vn; | |
549 | to->sb_inoalignmt = cpu_to_be32(from->sb_inoalignmt); | |
550 | to->sb_unit = cpu_to_be32(from->sb_unit); | |
551 | to->sb_width = cpu_to_be32(from->sb_width); | |
552 | to->sb_dirblklog = from->sb_dirblklog; | |
553 | to->sb_logsectlog = from->sb_logsectlog; | |
554 | to->sb_logsectsize = cpu_to_be16(from->sb_logsectsize); | |
555 | to->sb_logsunit = cpu_to_be32(from->sb_logsunit); | |
5e656dbb | 556 | |
19ebedcf DC |
557 | /* |
558 | * We need to ensure that bad_features2 always matches features2. | |
559 | * Hence we enforce that here rather than having to remember to do it | |
560 | * everywhere else that updates features2. | |
561 | */ | |
562 | from->sb_bad_features2 = from->sb_features2; | |
563 | to->sb_features2 = cpu_to_be32(from->sb_features2); | |
564 | to->sb_bad_features2 = cpu_to_be32(from->sb_bad_features2); | |
565 | ||
566 | if (xfs_sb_version_hascrc(from)) { | |
567 | to->sb_features_compat = cpu_to_be32(from->sb_features_compat); | |
568 | to->sb_features_ro_compat = | |
569 | cpu_to_be32(from->sb_features_ro_compat); | |
570 | to->sb_features_incompat = | |
571 | cpu_to_be32(from->sb_features_incompat); | |
572 | to->sb_features_log_incompat = | |
573 | cpu_to_be32(from->sb_features_log_incompat); | |
6bd8b7e1 | 574 | to->sb_spino_align = cpu_to_be32(from->sb_spino_align); |
19ebedcf | 575 | to->sb_lsn = cpu_to_be64(from->sb_lsn); |
9c4e12fb ES |
576 | if (xfs_sb_version_hasmetauuid(from)) |
577 | uuid_copy(&to->sb_meta_uuid, &from->sb_meta_uuid); | |
5e656dbb BN |
578 | } |
579 | } | |
580 | ||
5565d79a | 581 | static int |
a2ceac1f | 582 | xfs_sb_verify( |
f7b80291 | 583 | struct xfs_buf *bp, |
5629f836 | 584 | bool check_version) |
a2ceac1f DC |
585 | { |
586 | struct xfs_mount *mp = bp->b_target->bt_mount; | |
587 | struct xfs_sb sb; | |
a2ceac1f | 588 | |
5a35bf2c DC |
589 | /* |
590 | * Use call variant which doesn't convert quota flags from disk | |
591 | * format, because xfs_mount_validate_sb checks the on-disk flags. | |
592 | */ | |
593 | __xfs_sb_from_disk(&sb, XFS_BUF_TO_SBP(bp), false); | |
a2ceac1f DC |
594 | |
595 | /* | |
596 | * Only check the in progress field for the primary superblock as | |
597 | * mkfs.xfs doesn't clear it from secondary superblocks. | |
598 | */ | |
85428dd2 DC |
599 | return xfs_mount_validate_sb(mp, &sb, |
600 | bp->b_maps[0].bm_bn == XFS_SB_DADDR, | |
5629f836 | 601 | check_version); |
a2ceac1f DC |
602 | } |
603 | ||
5565d79a DC |
604 | /* |
605 | * If the superblock has the CRC feature bit set or the CRC field is non-null, | |
606 | * check that the CRC is valid. We check the CRC field is non-null because a | |
607 | * single bit error could clear the feature bit and unused parts of the | |
608 | * superblock are supposed to be zero. Hence a non-null crc field indicates that | |
609 | * we've potentially lost a feature bit and we should check it anyway. | |
46ea3a62 DC |
610 | * |
611 | * However, past bugs (i.e. in growfs) left non-zeroed regions beyond the | |
612 | * last field in V4 secondary superblocks. So for secondary superblocks, | |
613 | * we are more forgiving, and ignore CRC failures if the primary doesn't | |
614 | * indicate that the fs version is V5. | |
5565d79a | 615 | */ |
a2ceac1f DC |
616 | static void |
617 | xfs_sb_read_verify( | |
618 | struct xfs_buf *bp) | |
619 | { | |
5565d79a DC |
620 | struct xfs_mount *mp = bp->b_target->bt_mount; |
621 | struct xfs_dsb *dsb = XFS_BUF_TO_SBP(bp); | |
622 | int error; | |
623 | ||
624 | /* | |
625 | * open code the version check to avoid needing to convert the entire | |
626 | * superblock from disk order just to check the version number | |
627 | */ | |
628 | if (dsb->sb_magicnum == cpu_to_be32(XFS_SB_MAGIC) && | |
629 | (((be16_to_cpu(dsb->sb_versionnum) & XFS_SB_VERSION_NUMBITS) == | |
630 | XFS_SB_VERSION_5) || | |
631 | dsb->sb_crc != 0)) { | |
632 | ||
d21ca64d | 633 | if (!xfs_buf_verify_cksum(bp, XFS_SB_CRC_OFF)) { |
46ea3a62 | 634 | /* Only fail bad secondaries on a known V5 filesystem */ |
f3cddd91 | 635 | if (bp->b_bn == XFS_SB_DADDR || |
46ea3a62 | 636 | xfs_sb_version_hascrc(&mp->m_sb)) { |
12b53197 | 637 | error = -EFSBADCRC; |
46ea3a62 DC |
638 | goto out_error; |
639 | } | |
5565d79a DC |
640 | } |
641 | } | |
f7b80291 | 642 | error = xfs_sb_verify(bp, true); |
5565d79a DC |
643 | |
644 | out_error: | |
7e6c95f1 | 645 | if (error == -EFSCORRUPTED || error == -EFSBADCRC) |
1e697959 | 646 | xfs_verifier_error(bp, error, __this_address); |
7e6c95f1 | 647 | else if (error) |
5565d79a | 648 | xfs_buf_ioerror(bp, error); |
a2ceac1f DC |
649 | } |
650 | ||
651 | /* | |
652 | * We may be probed for a filesystem match, so we may not want to emit | |
653 | * messages when the superblock buffer is not actually an XFS superblock. | |
4896e6c8 | 654 | * If we find an XFS superblock, then run a normal, noisy mount because we are |
a2ceac1f DC |
655 | * really going to mount it and want to know about errors. |
656 | */ | |
657 | static void | |
658 | xfs_sb_quiet_read_verify( | |
659 | struct xfs_buf *bp) | |
660 | { | |
5565d79a | 661 | struct xfs_dsb *dsb = XFS_BUF_TO_SBP(bp); |
a2ceac1f | 662 | |
5565d79a | 663 | if (dsb->sb_magicnum == cpu_to_be32(XFS_SB_MAGIC)) { |
a2ceac1f DC |
664 | /* XFS filesystem, verify noisily! */ |
665 | xfs_sb_read_verify(bp); | |
666 | return; | |
667 | } | |
668 | /* quietly fail */ | |
12b53197 | 669 | xfs_buf_ioerror(bp, -EWRONGFS); |
a2ceac1f DC |
670 | } |
671 | ||
672 | static void | |
673 | xfs_sb_write_verify( | |
5565d79a | 674 | struct xfs_buf *bp) |
a2ceac1f | 675 | { |
5565d79a | 676 | struct xfs_mount *mp = bp->b_target->bt_mount; |
37d086ca | 677 | struct xfs_buf_log_item *bip = bp->b_log_item; |
5565d79a DC |
678 | int error; |
679 | ||
f7b80291 | 680 | error = xfs_sb_verify(bp, false); |
5565d79a | 681 | if (error) { |
1e697959 | 682 | xfs_verifier_error(bp, error, __this_address); |
5565d79a DC |
683 | return; |
684 | } | |
685 | ||
686 | if (!xfs_sb_version_hascrc(&mp->m_sb)) | |
687 | return; | |
688 | ||
689 | if (bip) | |
690 | XFS_BUF_TO_SBP(bp)->sb_lsn = cpu_to_be64(bip->bli_item.li_lsn); | |
691 | ||
43b5aeed | 692 | xfs_buf_update_cksum(bp, XFS_SB_CRC_OFF); |
a2ceac1f DC |
693 | } |
694 | ||
695 | const struct xfs_buf_ops xfs_sb_buf_ops = { | |
a3fac935 | 696 | .name = "xfs_sb", |
a2ceac1f DC |
697 | .verify_read = xfs_sb_read_verify, |
698 | .verify_write = xfs_sb_write_verify, | |
699 | }; | |
700 | ||
4896e6c8 | 701 | const struct xfs_buf_ops xfs_sb_quiet_buf_ops = { |
a3fac935 | 702 | .name = "xfs_sb_quiet", |
a2ceac1f DC |
703 | .verify_read = xfs_sb_quiet_read_verify, |
704 | .verify_write = xfs_sb_write_verify, | |
705 | }; | |
706 | ||
5e656dbb BN |
707 | /* |
708 | * xfs_mount_common | |
709 | * | |
710 | * Mount initialization code establishing various mount | |
711 | * fields from the superblock associated with the given | |
712 | * mount structure | |
5e656dbb BN |
713 | */ |
714 | void | |
4896e6c8 DC |
715 | xfs_sb_mount_common( |
716 | struct xfs_mount *mp, | |
717 | struct xfs_sb *sbp) | |
5e656dbb | 718 | { |
5e656dbb | 719 | mp->m_agfrotor = mp->m_agirotor = 0; |
5e656dbb BN |
720 | mp->m_maxagi = mp->m_sb.sb_agcount; |
721 | mp->m_blkbit_log = sbp->sb_blocklog + XFS_NBBYLOG; | |
722 | mp->m_blkbb_log = sbp->sb_blocklog - BBSHIFT; | |
723 | mp->m_sectbb_log = sbp->sb_sectlog - BBSHIFT; | |
724 | mp->m_agno_log = xfs_highbit32(sbp->sb_agcount - 1) + 1; | |
725 | mp->m_agino_log = sbp->sb_inopblog + sbp->sb_agblklog; | |
5e656dbb BN |
726 | mp->m_blockmask = sbp->sb_blocksize - 1; |
727 | mp->m_blockwsize = sbp->sb_blocksize >> XFS_WORDLOG; | |
728 | mp->m_blockwmask = mp->m_blockwsize - 1; | |
5e656dbb | 729 | |
b3563c19 BN |
730 | mp->m_alloc_mxr[0] = xfs_allocbt_maxrecs(mp, sbp->sb_blocksize, 1); |
731 | mp->m_alloc_mxr[1] = xfs_allocbt_maxrecs(mp, sbp->sb_blocksize, 0); | |
732 | mp->m_alloc_mnr[0] = mp->m_alloc_mxr[0] / 2; | |
733 | mp->m_alloc_mnr[1] = mp->m_alloc_mxr[1] / 2; | |
734 | ||
735 | mp->m_inobt_mxr[0] = xfs_inobt_maxrecs(mp, sbp->sb_blocksize, 1); | |
736 | mp->m_inobt_mxr[1] = xfs_inobt_maxrecs(mp, sbp->sb_blocksize, 0); | |
737 | mp->m_inobt_mnr[0] = mp->m_inobt_mxr[0] / 2; | |
738 | mp->m_inobt_mnr[1] = mp->m_inobt_mxr[1] / 2; | |
739 | ||
740 | mp->m_bmap_dmxr[0] = xfs_bmbt_maxrecs(mp, sbp->sb_blocksize, 1); | |
741 | mp->m_bmap_dmxr[1] = xfs_bmbt_maxrecs(mp, sbp->sb_blocksize, 0); | |
742 | mp->m_bmap_dmnr[0] = mp->m_bmap_dmxr[0] / 2; | |
743 | mp->m_bmap_dmnr[1] = mp->m_bmap_dmxr[1] / 2; | |
5e656dbb | 744 | |
1421de38 ES |
745 | mp->m_rmap_mxr[0] = xfs_rmapbt_maxrecs(sbp->sb_blocksize, 1); |
746 | mp->m_rmap_mxr[1] = xfs_rmapbt_maxrecs(sbp->sb_blocksize, 0); | |
b3a96b46 DW |
747 | mp->m_rmap_mnr[0] = mp->m_rmap_mxr[0] / 2; |
748 | mp->m_rmap_mnr[1] = mp->m_rmap_mxr[1] / 2; | |
749 | ||
1421de38 ES |
750 | mp->m_refc_mxr[0] = xfs_refcountbt_maxrecs(sbp->sb_blocksize, true); |
751 | mp->m_refc_mxr[1] = xfs_refcountbt_maxrecs(sbp->sb_blocksize, false); | |
d8079fe0 DW |
752 | mp->m_refc_mnr[0] = mp->m_refc_mxr[0] / 2; |
753 | mp->m_refc_mnr[1] = mp->m_refc_mxr[1] / 2; | |
754 | ||
5e656dbb | 755 | mp->m_bsize = XFS_FSB_TO_BB(mp, 1); |
d7ff12b8 | 756 | mp->m_ialloc_inos = max_t(uint16_t, XFS_INODES_PER_CHUNK, |
5e656dbb BN |
757 | sbp->sb_inopblock); |
758 | mp->m_ialloc_blks = mp->m_ialloc_inos >> sbp->sb_inopblog; | |
62dc6cdb BF |
759 | |
760 | if (sbp->sb_spino_align) | |
761 | mp->m_ialloc_min_blks = sbp->sb_spino_align; | |
762 | else | |
763 | mp->m_ialloc_min_blks = mp->m_ialloc_blks; | |
b8a8d6e5 DW |
764 | mp->m_alloc_set_aside = xfs_alloc_set_aside(mp); |
765 | mp->m_ag_max_usable = xfs_alloc_ag_max_usable(mp); | |
5e656dbb BN |
766 | } |
767 | ||
cdded3d8 DC |
768 | /* |
769 | * xfs_initialize_perag_data | |
770 | * | |
771 | * Read in each per-ag structure so we can count up the number of | |
772 | * allocated inodes, free inodes and used filesystem blocks as this | |
773 | * information is no longer persistent in the superblock. Once we have | |
774 | * this information, write it into the in-core superblock structure. | |
775 | */ | |
5e656dbb | 776 | int |
4896e6c8 DC |
777 | xfs_initialize_perag_data( |
778 | struct xfs_mount *mp, | |
779 | xfs_agnumber_t agcount) | |
cdded3d8 DC |
780 | { |
781 | xfs_agnumber_t index; | |
782 | xfs_perag_t *pag; | |
783 | xfs_sb_t *sbp = &mp->m_sb; | |
5e656dbb BN |
784 | uint64_t ifree = 0; |
785 | uint64_t ialloc = 0; | |
786 | uint64_t bfree = 0; | |
787 | uint64_t bfreelst = 0; | |
788 | uint64_t btree = 0; | |
52f4e126 | 789 | uint64_t fdblocks; |
cdded3d8 | 790 | int error; |
cdded3d8 DC |
791 | |
792 | for (index = 0; index < agcount; index++) { | |
793 | /* | |
794 | * read the agf, then the agi. This gets us | |
56b2de80 | 795 | * all the information we need and populates the |
cdded3d8 DC |
796 | * per-ag structures for us. |
797 | */ | |
798 | error = xfs_alloc_pagf_init(mp, NULL, index, 0); | |
799 | if (error) | |
800 | return error; | |
801 | ||
802 | error = xfs_ialloc_pagi_init(mp, NULL, index); | |
803 | if (error) | |
804 | return error; | |
56b2de80 | 805 | pag = xfs_perag_get(mp, index); |
cdded3d8 DC |
806 | ifree += pag->pagi_freecount; |
807 | ialloc += pag->pagi_count; | |
808 | bfree += pag->pagf_freeblks; | |
809 | bfreelst += pag->pagf_flcount; | |
810 | btree += pag->pagf_btreeblks; | |
56b2de80 | 811 | xfs_perag_put(pag); |
cdded3d8 | 812 | } |
52f4e126 DW |
813 | fdblocks = bfree + bfreelst + btree; |
814 | ||
815 | /* | |
816 | * If the new summary counts are obviously incorrect, fail the | |
817 | * mount operation because that implies the AGFs are also corrupt. | |
818 | * Clear BAD_SUMMARY so that we don't unmount with a dirty log, which | |
819 | * will prevent xfs_repair from fixing anything. | |
820 | */ | |
821 | if (fdblocks > sbp->sb_dblocks || ifree > ialloc) { | |
822 | xfs_alert(mp, "AGF corruption. Please run xfs_repair."); | |
823 | error = -EFSCORRUPTED; | |
824 | goto out; | |
825 | } | |
19ebedcf DC |
826 | |
827 | /* Overwrite incore superblock counters with just-read data */ | |
5e656dbb | 828 | spin_lock(&mp->m_sb_lock); |
cdded3d8 DC |
829 | sbp->sb_ifree = ifree; |
830 | sbp->sb_icount = ialloc; | |
52f4e126 | 831 | sbp->sb_fdblocks = fdblocks; |
5e656dbb BN |
832 | spin_unlock(&mp->m_sb_lock); |
833 | ||
19ebedcf | 834 | xfs_reinit_percpu_counters(mp); |
52f4e126 DW |
835 | out: |
836 | mp->m_flags &= ~XFS_MOUNT_BAD_SUMMARY; | |
837 | return error; | |
cdded3d8 | 838 | } |
5e656dbb BN |
839 | |
840 | /* | |
19ebedcf DC |
841 | * xfs_log_sb() can be used to copy arbitrary changes to the in-core superblock |
842 | * into the superblock buffer to be logged. It does not provide the higher | |
843 | * level of locking that is needed to protect the in-core superblock from | |
844 | * concurrent access. | |
5e656dbb BN |
845 | */ |
846 | void | |
19ebedcf DC |
847 | xfs_log_sb( |
848 | struct xfs_trans *tp) | |
5e656dbb | 849 | { |
19ebedcf DC |
850 | struct xfs_mount *mp = tp->t_mountp; |
851 | struct xfs_buf *bp = xfs_trans_getsb(tp, mp, 0); | |
5e656dbb | 852 | |
19ebedcf DC |
853 | mp->m_sb.sb_icount = percpu_counter_sum(&mp->m_icount); |
854 | mp->m_sb.sb_ifree = percpu_counter_sum(&mp->m_ifree); | |
855 | mp->m_sb.sb_fdblocks = percpu_counter_sum(&mp->m_fdblocks); | |
4896e6c8 | 856 | |
19ebedcf DC |
857 | xfs_sb_to_disk(XFS_BUF_TO_SBP(bp), &mp->m_sb); |
858 | xfs_trans_buf_set_type(tp, bp, XFS_BLFT_SB_BUF); | |
859 | xfs_trans_log_buf(tp, bp, 0, sizeof(struct xfs_dsb)); | |
860 | } | |
5e656dbb | 861 | |
19ebedcf DC |
862 | /* |
863 | * xfs_sync_sb | |
864 | * | |
865 | * Sync the superblock to disk. | |
866 | * | |
867 | * Note that the caller is responsible for checking the frozen state of the | |
868 | * filesystem. This procedure uses the non-blocking transaction allocator and | |
869 | * thus will allow modifications to a frozen fs. This is required because this | |
870 | * code can be called during the process of freezing where use of the high-level | |
871 | * allocator would deadlock. | |
872 | */ | |
873 | int | |
874 | xfs_sync_sb( | |
875 | struct xfs_mount *mp, | |
876 | bool wait) | |
877 | { | |
878 | struct xfs_trans *tp; | |
879 | int error; | |
5e656dbb | 880 | |
9074815c CH |
881 | error = xfs_trans_alloc(mp, &M_RES(mp)->tr_sb, 0, 0, |
882 | XFS_TRANS_NO_WRITECOUNT, &tp); | |
883 | if (error) | |
19ebedcf | 884 | return error; |
5e656dbb | 885 | |
19ebedcf DC |
886 | xfs_log_sb(tp); |
887 | if (wait) | |
888 | xfs_trans_set_sync(tp); | |
de5a3f46 | 889 | return xfs_trans_commit(tp); |
5e656dbb | 890 | } |
a2a52384 | 891 | |
971ce259 DC |
892 | /* |
893 | * Update all the secondary superblocks to match the new state of the primary. | |
894 | * Because we are completely overwriting all the existing fields in the | |
895 | * secondary superblock buffers, there is no need to read them in from disk. | |
896 | * Just get a new buffer, stamp it and write it. | |
897 | * | |
898 | * The sb buffers need to be cached here so that we serialise against other | |
899 | * operations that access the secondary superblocks, but we don't want to keep | |
900 | * them in memory once it is written so we mark it as a one-shot buffer. | |
901 | */ | |
902 | int | |
903 | xfs_update_secondary_sbs( | |
904 | struct xfs_mount *mp) | |
905 | { | |
906 | xfs_agnumber_t agno; | |
907 | int saved_error = 0; | |
908 | int error = 0; | |
909 | LIST_HEAD (buffer_list); | |
910 | ||
911 | /* update secondary superblocks. */ | |
912 | for (agno = 1; agno < mp->m_sb.sb_agcount; agno++) { | |
913 | struct xfs_buf *bp; | |
914 | ||
915 | bp = xfs_buf_get(mp->m_ddev_targp, | |
916 | XFS_AG_DADDR(mp, agno, XFS_SB_DADDR), | |
917 | XFS_FSS_TO_BB(mp, 1), 0); | |
918 | /* | |
919 | * If we get an error reading or writing alternate superblocks, | |
920 | * continue. xfs_repair chooses the "best" superblock based | |
921 | * on most matches; if we break early, we'll leave more | |
922 | * superblocks un-updated than updated, and xfs_repair may | |
923 | * pick them over the properly-updated primary. | |
924 | */ | |
925 | if (!bp) { | |
926 | xfs_warn(mp, | |
927 | "error allocating secondary superblock for ag %d", | |
928 | agno); | |
929 | if (!saved_error) | |
930 | saved_error = -ENOMEM; | |
931 | continue; | |
932 | } | |
933 | ||
934 | bp->b_ops = &xfs_sb_buf_ops; | |
935 | xfs_buf_oneshot(bp); | |
936 | xfs_buf_zero(bp, 0, BBTOB(bp->b_length)); | |
937 | xfs_sb_to_disk(XFS_BUF_TO_SBP(bp), &mp->m_sb); | |
938 | xfs_buf_delwri_queue(bp, &buffer_list); | |
939 | xfs_buf_relse(bp); | |
940 | ||
941 | /* don't hold too many buffers at once */ | |
942 | if (agno % 16) | |
943 | continue; | |
944 | ||
945 | error = xfs_buf_delwri_submit(&buffer_list); | |
946 | if (error) { | |
947 | xfs_warn(mp, | |
948 | "write error %d updating a secondary superblock near ag %d", | |
949 | error, agno); | |
950 | if (!saved_error) | |
951 | saved_error = error; | |
952 | continue; | |
953 | } | |
954 | } | |
955 | error = xfs_buf_delwri_submit(&buffer_list); | |
956 | if (error) { | |
957 | xfs_warn(mp, | |
958 | "write error %d updating a secondary superblock near ag %d", | |
959 | error, agno); | |
960 | } | |
961 | ||
962 | return saved_error ? saved_error : error; | |
963 | } | |
964 | ||
691fdd72 ES |
965 | /* |
966 | * Same behavior as xfs_sync_sb, except that it is always synchronous and it | |
967 | * also writes the superblock buffer to disk sector 0 immediately. | |
968 | */ | |
969 | int | |
970 | xfs_sync_sb_buf( | |
971 | struct xfs_mount *mp) | |
972 | { | |
973 | struct xfs_trans *tp; | |
974 | struct xfs_buf *bp; | |
975 | int error; | |
976 | ||
977 | error = xfs_trans_alloc(mp, &M_RES(mp)->tr_sb, 0, 0, 0, &tp); | |
978 | if (error) | |
979 | return error; | |
980 | ||
981 | bp = xfs_trans_getsb(tp, mp, 0); | |
982 | xfs_log_sb(tp); | |
983 | xfs_trans_bhold(tp, bp); | |
984 | xfs_trans_set_sync(tp); | |
985 | error = xfs_trans_commit(tp); | |
986 | if (error) | |
987 | goto out; | |
988 | /* | |
989 | * write out the sb buffer to get the changes to disk | |
990 | */ | |
991 | error = xfs_bwrite(bp); | |
992 | out: | |
993 | xfs_buf_relse(bp); | |
994 | return error; | |
995 | } | |
996 | ||
a2a52384 DW |
997 | int |
998 | xfs_fs_geometry( | |
fdef0e8b DW |
999 | struct xfs_sb *sbp, |
1000 | struct xfs_fsop_geom *geo, | |
1001 | int struct_version) | |
a2a52384 | 1002 | { |
fdef0e8b DW |
1003 | memset(geo, 0, sizeof(struct xfs_fsop_geom)); |
1004 | ||
1005 | geo->blocksize = sbp->sb_blocksize; | |
1006 | geo->rtextsize = sbp->sb_rextsize; | |
1007 | geo->agblocks = sbp->sb_agblocks; | |
1008 | geo->agcount = sbp->sb_agcount; | |
1009 | geo->logblocks = sbp->sb_logblocks; | |
1010 | geo->sectsize = sbp->sb_sectsize; | |
1011 | geo->inodesize = sbp->sb_inodesize; | |
1012 | geo->imaxpct = sbp->sb_imax_pct; | |
1013 | geo->datablocks = sbp->sb_dblocks; | |
1014 | geo->rtblocks = sbp->sb_rblocks; | |
1015 | geo->rtextents = sbp->sb_rextents; | |
1016 | geo->logstart = sbp->sb_logstart; | |
1017 | BUILD_BUG_ON(sizeof(geo->uuid) != sizeof(sbp->sb_uuid)); | |
1018 | memcpy(geo->uuid, &sbp->sb_uuid, sizeof(sbp->sb_uuid)); | |
1019 | ||
1020 | if (struct_version < 2) | |
1021 | return 0; | |
1022 | ||
1023 | geo->sunit = sbp->sb_unit; | |
1024 | geo->swidth = sbp->sb_width; | |
1025 | ||
1026 | if (struct_version < 3) | |
1027 | return 0; | |
1028 | ||
1029 | geo->version = XFS_FSOP_GEOM_VERSION; | |
1030 | geo->flags = XFS_FSOP_GEOM_FLAGS_NLINK | | |
1031 | XFS_FSOP_GEOM_FLAGS_DIRV2; | |
1032 | if (xfs_sb_version_hasattr(sbp)) | |
1033 | geo->flags |= XFS_FSOP_GEOM_FLAGS_ATTR; | |
1034 | if (xfs_sb_version_hasquota(sbp)) | |
1035 | geo->flags |= XFS_FSOP_GEOM_FLAGS_QUOTA; | |
1036 | if (xfs_sb_version_hasalign(sbp)) | |
1037 | geo->flags |= XFS_FSOP_GEOM_FLAGS_IALIGN; | |
1038 | if (xfs_sb_version_hasdalign(sbp)) | |
1039 | geo->flags |= XFS_FSOP_GEOM_FLAGS_DALIGN; | |
1040 | if (xfs_sb_version_hasextflgbit(sbp)) | |
1041 | geo->flags |= XFS_FSOP_GEOM_FLAGS_EXTFLG; | |
1042 | if (xfs_sb_version_hassector(sbp)) | |
1043 | geo->flags |= XFS_FSOP_GEOM_FLAGS_SECTOR; | |
1044 | if (xfs_sb_version_hasasciici(sbp)) | |
1045 | geo->flags |= XFS_FSOP_GEOM_FLAGS_DIRV2CI; | |
1046 | if (xfs_sb_version_haslazysbcount(sbp)) | |
1047 | geo->flags |= XFS_FSOP_GEOM_FLAGS_LAZYSB; | |
1048 | if (xfs_sb_version_hasattr2(sbp)) | |
1049 | geo->flags |= XFS_FSOP_GEOM_FLAGS_ATTR2; | |
1050 | if (xfs_sb_version_hasprojid32bit(sbp)) | |
1051 | geo->flags |= XFS_FSOP_GEOM_FLAGS_PROJID32; | |
1052 | if (xfs_sb_version_hascrc(sbp)) | |
1053 | geo->flags |= XFS_FSOP_GEOM_FLAGS_V5SB; | |
1054 | if (xfs_sb_version_hasftype(sbp)) | |
1055 | geo->flags |= XFS_FSOP_GEOM_FLAGS_FTYPE; | |
1056 | if (xfs_sb_version_hasfinobt(sbp)) | |
1057 | geo->flags |= XFS_FSOP_GEOM_FLAGS_FINOBT; | |
1058 | if (xfs_sb_version_hassparseinodes(sbp)) | |
1059 | geo->flags |= XFS_FSOP_GEOM_FLAGS_SPINODES; | |
1060 | if (xfs_sb_version_hasrmapbt(sbp)) | |
1061 | geo->flags |= XFS_FSOP_GEOM_FLAGS_RMAPBT; | |
1062 | if (xfs_sb_version_hasreflink(sbp)) | |
1063 | geo->flags |= XFS_FSOP_GEOM_FLAGS_REFLINK; | |
1064 | if (xfs_sb_version_hassector(sbp)) | |
1065 | geo->logsectsize = sbp->sb_logsectsize; | |
1066 | else | |
1067 | geo->logsectsize = BBSIZE; | |
1068 | geo->rtsectsize = sbp->sb_blocksize; | |
1069 | geo->dirblocksize = xfs_dir2_dirblock_bytes(sbp); | |
1070 | ||
dfcfc5f1 | 1071 | if (struct_version < 4) |
fdef0e8b DW |
1072 | return 0; |
1073 | ||
1074 | if (xfs_sb_version_haslogv2(sbp)) | |
1075 | geo->flags |= XFS_FSOP_GEOM_FLAGS_LOGV2; | |
1076 | ||
1077 | geo->logsunit = sbp->sb_logsunit; | |
a2a52384 | 1078 | |
a2a52384 DW |
1079 | return 0; |
1080 | } | |
17d741a8 DW |
1081 | |
1082 | /* Read a secondary superblock. */ | |
1083 | int | |
1084 | xfs_sb_read_secondary( | |
1085 | struct xfs_mount *mp, | |
1086 | struct xfs_trans *tp, | |
1087 | xfs_agnumber_t agno, | |
1088 | struct xfs_buf **bpp) | |
1089 | { | |
1090 | struct xfs_buf *bp; | |
1091 | int error; | |
1092 | ||
1093 | ASSERT(agno != 0 && agno != NULLAGNUMBER); | |
1094 | error = xfs_trans_read_buf(mp, tp, mp->m_ddev_targp, | |
1095 | XFS_AG_DADDR(mp, agno, XFS_SB_BLOCK(mp)), | |
1096 | XFS_FSS_TO_BB(mp, 1), 0, &bp, &xfs_sb_buf_ops); | |
1097 | if (error) | |
1098 | return error; | |
1099 | xfs_buf_set_ref(bp, XFS_SSB_REF); | |
1100 | *bpp = bp; | |
1101 | return 0; | |
1102 | } | |
b153fb40 DW |
1103 | |
1104 | /* Get an uninitialised secondary superblock buffer. */ | |
1105 | int | |
1106 | xfs_sb_get_secondary( | |
1107 | struct xfs_mount *mp, | |
1108 | struct xfs_trans *tp, | |
1109 | xfs_agnumber_t agno, | |
1110 | struct xfs_buf **bpp) | |
1111 | { | |
1112 | struct xfs_buf *bp; | |
1113 | ||
1114 | ASSERT(agno != 0 && agno != NULLAGNUMBER); | |
1115 | bp = xfs_trans_get_buf(tp, mp->m_ddev_targp, | |
1116 | XFS_AG_DADDR(mp, agno, XFS_SB_BLOCK(mp)), | |
1117 | XFS_FSS_TO_BB(mp, 1), 0); | |
1118 | if (!bp) | |
1119 | return -ENOMEM; | |
1120 | bp->b_ops = &xfs_sb_buf_ops; | |
1121 | xfs_buf_oneshot(bp); | |
1122 | *bpp = bp; | |
1123 | return 0; | |
1124 | } |