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0b61f8a4 | 1 | // SPDX-License-Identifier: GPL-2.0 |
1da177e4 | 2 | /* |
7b718769 NS |
3 | * Copyright (c) 2000-2005 Silicon Graphics, Inc. |
4 | * All Rights Reserved. | |
1da177e4 | 5 | */ |
1da177e4 | 6 | #include "xfs.h" |
a844f451 | 7 | #include "xfs_fs.h" |
70a9883c | 8 | #include "xfs_shared.h" |
239880ef DC |
9 | #include "xfs_format.h" |
10 | #include "xfs_log_format.h" | |
11 | #include "xfs_trans_resv.h" | |
a844f451 | 12 | #include "xfs_bit.h" |
1da177e4 | 13 | #include "xfs_sb.h" |
1da177e4 | 14 | #include "xfs_mount.h" |
1da177e4 | 15 | #include "xfs_inode.h" |
a4fbe6ab | 16 | #include "xfs_dir2.h" |
a844f451 | 17 | #include "xfs_ialloc.h" |
1da177e4 LT |
18 | #include "xfs_alloc.h" |
19 | #include "xfs_rtalloc.h" | |
20 | #include "xfs_bmap.h" | |
a4fbe6ab DC |
21 | #include "xfs_trans.h" |
22 | #include "xfs_trans_priv.h" | |
23 | #include "xfs_log.h" | |
b5f17bec | 24 | #include "xfs_log_priv.h" |
1da177e4 | 25 | #include "xfs_error.h" |
1da177e4 LT |
26 | #include "xfs_quota.h" |
27 | #include "xfs_fsops.h" | |
6d8b79cf | 28 | #include "xfs_icache.h" |
a31b1d3d | 29 | #include "xfs_sysfs.h" |
035e00ac | 30 | #include "xfs_rmap_btree.h" |
1946b91c | 31 | #include "xfs_refcount_btree.h" |
174edb0e | 32 | #include "xfs_reflink.h" |
ebf55872 | 33 | #include "xfs_extent_busy.h" |
39353ff6 | 34 | #include "xfs_health.h" |
13eaec4b | 35 | #include "xfs_trace.h" |
9bbafc71 | 36 | #include "xfs_ag.h" |
1da177e4 | 37 | |
27174203 CH |
38 | static DEFINE_MUTEX(xfs_uuid_table_mutex); |
39 | static int xfs_uuid_table_size; | |
40 | static uuid_t *xfs_uuid_table; | |
41 | ||
af3b6382 DW |
42 | void |
43 | xfs_uuid_table_free(void) | |
44 | { | |
45 | if (xfs_uuid_table_size == 0) | |
46 | return; | |
47 | kmem_free(xfs_uuid_table); | |
48 | xfs_uuid_table = NULL; | |
49 | xfs_uuid_table_size = 0; | |
50 | } | |
51 | ||
27174203 CH |
52 | /* |
53 | * See if the UUID is unique among mounted XFS filesystems. | |
54 | * Mount fails if UUID is nil or a FS with the same UUID is already mounted. | |
55 | */ | |
56 | STATIC int | |
57 | xfs_uuid_mount( | |
58 | struct xfs_mount *mp) | |
59 | { | |
60 | uuid_t *uuid = &mp->m_sb.sb_uuid; | |
61 | int hole, i; | |
62 | ||
8f720d9f | 63 | /* Publish UUID in struct super_block */ |
85787090 | 64 | uuid_copy(&mp->m_super->s_uuid, uuid); |
8f720d9f | 65 | |
0560f31a | 66 | if (xfs_has_nouuid(mp)) |
27174203 CH |
67 | return 0; |
68 | ||
d905fdaa AG |
69 | if (uuid_is_null(uuid)) { |
70 | xfs_warn(mp, "Filesystem has null UUID - can't mount"); | |
2451337d | 71 | return -EINVAL; |
27174203 CH |
72 | } |
73 | ||
74 | mutex_lock(&xfs_uuid_table_mutex); | |
75 | for (i = 0, hole = -1; i < xfs_uuid_table_size; i++) { | |
d905fdaa | 76 | if (uuid_is_null(&xfs_uuid_table[i])) { |
27174203 CH |
77 | hole = i; |
78 | continue; | |
79 | } | |
80 | if (uuid_equal(uuid, &xfs_uuid_table[i])) | |
81 | goto out_duplicate; | |
82 | } | |
83 | ||
84 | if (hole < 0) { | |
771915c4 | 85 | xfs_uuid_table = krealloc(xfs_uuid_table, |
27174203 | 86 | (xfs_uuid_table_size + 1) * sizeof(*xfs_uuid_table), |
771915c4 | 87 | GFP_KERNEL | __GFP_NOFAIL); |
27174203 CH |
88 | hole = xfs_uuid_table_size++; |
89 | } | |
90 | xfs_uuid_table[hole] = *uuid; | |
91 | mutex_unlock(&xfs_uuid_table_mutex); | |
92 | ||
93 | return 0; | |
94 | ||
95 | out_duplicate: | |
96 | mutex_unlock(&xfs_uuid_table_mutex); | |
021000e5 | 97 | xfs_warn(mp, "Filesystem has duplicate UUID %pU - can't mount", uuid); |
2451337d | 98 | return -EINVAL; |
27174203 CH |
99 | } |
100 | ||
101 | STATIC void | |
102 | xfs_uuid_unmount( | |
103 | struct xfs_mount *mp) | |
104 | { | |
105 | uuid_t *uuid = &mp->m_sb.sb_uuid; | |
106 | int i; | |
107 | ||
0560f31a | 108 | if (xfs_has_nouuid(mp)) |
27174203 CH |
109 | return; |
110 | ||
111 | mutex_lock(&xfs_uuid_table_mutex); | |
112 | for (i = 0; i < xfs_uuid_table_size; i++) { | |
d905fdaa | 113 | if (uuid_is_null(&xfs_uuid_table[i])) |
27174203 CH |
114 | continue; |
115 | if (!uuid_equal(uuid, &xfs_uuid_table[i])) | |
116 | continue; | |
117 | memset(&xfs_uuid_table[i], 0, sizeof(uuid_t)); | |
118 | break; | |
119 | } | |
120 | ASSERT(i < xfs_uuid_table_size); | |
121 | mutex_unlock(&xfs_uuid_table_mutex); | |
122 | } | |
123 | ||
4cc929ee NS |
124 | /* |
125 | * Check size of device based on the (data/realtime) block count. | |
126 | * Note: this check is used by the growfs code as well as mount. | |
127 | */ | |
128 | int | |
129 | xfs_sb_validate_fsb_count( | |
130 | xfs_sb_t *sbp, | |
c8ce540d | 131 | uint64_t nblocks) |
4cc929ee NS |
132 | { |
133 | ASSERT(PAGE_SHIFT >= sbp->sb_blocklog); | |
134 | ASSERT(sbp->sb_blocklog >= BBSHIFT); | |
135 | ||
d5cf09ba | 136 | /* Limited by ULONG_MAX of page cache index */ |
09cbfeaf | 137 | if (nblocks >> (PAGE_SHIFT - sbp->sb_blocklog) > ULONG_MAX) |
2451337d | 138 | return -EFBIG; |
4cc929ee NS |
139 | return 0; |
140 | } | |
1da177e4 | 141 | |
1da177e4 LT |
142 | /* |
143 | * xfs_readsb | |
144 | * | |
145 | * Does the initial read of the superblock. | |
146 | */ | |
147 | int | |
ff55068c DC |
148 | xfs_readsb( |
149 | struct xfs_mount *mp, | |
150 | int flags) | |
1da177e4 LT |
151 | { |
152 | unsigned int sector_size; | |
04a1e6c5 DC |
153 | struct xfs_buf *bp; |
154 | struct xfs_sb *sbp = &mp->m_sb; | |
1da177e4 | 155 | int error; |
af34e09d | 156 | int loud = !(flags & XFS_MFSI_QUIET); |
daba5427 | 157 | const struct xfs_buf_ops *buf_ops; |
1da177e4 LT |
158 | |
159 | ASSERT(mp->m_sb_bp == NULL); | |
160 | ASSERT(mp->m_ddev_targp != NULL); | |
161 | ||
daba5427 ES |
162 | /* |
163 | * For the initial read, we must guess at the sector | |
164 | * size based on the block device. It's enough to | |
165 | * get the sb_sectsize out of the superblock and | |
166 | * then reread with the proper length. | |
167 | * We don't verify it yet, because it may not be complete. | |
168 | */ | |
169 | sector_size = xfs_getsize_buftarg(mp->m_ddev_targp); | |
170 | buf_ops = NULL; | |
171 | ||
1da177e4 | 172 | /* |
c891c30a BF |
173 | * Allocate a (locked) buffer to hold the superblock. This will be kept |
174 | * around at all times to optimize access to the superblock. Therefore, | |
175 | * set XBF_NO_IOACCT to make sure it doesn't hold the buftarg count | |
176 | * elevated. | |
1da177e4 | 177 | */ |
26af6552 | 178 | reread: |
ba372674 | 179 | error = xfs_buf_read_uncached(mp->m_ddev_targp, XFS_SB_DADDR, |
c891c30a BF |
180 | BTOBB(sector_size), XBF_NO_IOACCT, &bp, |
181 | buf_ops); | |
ba372674 | 182 | if (error) { |
eab4e633 | 183 | if (loud) |
e721f504 | 184 | xfs_warn(mp, "SB validate failed with error %d.", error); |
ac75a1f7 | 185 | /* bad CRC means corrupted metadata */ |
2451337d DC |
186 | if (error == -EFSBADCRC) |
187 | error = -EFSCORRUPTED; | |
ba372674 | 188 | return error; |
eab4e633 | 189 | } |
1da177e4 LT |
190 | |
191 | /* | |
192 | * Initialize the mount structure from the superblock. | |
1da177e4 | 193 | */ |
3e6e8afd | 194 | xfs_sb_from_disk(sbp, bp->b_addr); |
556b8883 DC |
195 | |
196 | /* | |
197 | * If we haven't validated the superblock, do so now before we try | |
198 | * to check the sector size and reread the superblock appropriately. | |
199 | */ | |
200 | if (sbp->sb_magicnum != XFS_SB_MAGIC) { | |
201 | if (loud) | |
202 | xfs_warn(mp, "Invalid superblock magic number"); | |
2451337d | 203 | error = -EINVAL; |
556b8883 DC |
204 | goto release_buf; |
205 | } | |
ff55068c | 206 | |
1da177e4 LT |
207 | /* |
208 | * We must be able to do sector-sized and sector-aligned IO. | |
209 | */ | |
04a1e6c5 | 210 | if (sector_size > sbp->sb_sectsize) { |
af34e09d DC |
211 | if (loud) |
212 | xfs_warn(mp, "device supports %u byte sectors (not %u)", | |
04a1e6c5 | 213 | sector_size, sbp->sb_sectsize); |
2451337d | 214 | error = -ENOSYS; |
26af6552 | 215 | goto release_buf; |
1da177e4 LT |
216 | } |
217 | ||
daba5427 | 218 | if (buf_ops == NULL) { |
556b8883 DC |
219 | /* |
220 | * Re-read the superblock so the buffer is correctly sized, | |
221 | * and properly verified. | |
222 | */ | |
1da177e4 | 223 | xfs_buf_relse(bp); |
04a1e6c5 | 224 | sector_size = sbp->sb_sectsize; |
daba5427 | 225 | buf_ops = loud ? &xfs_sb_buf_ops : &xfs_sb_quiet_buf_ops; |
26af6552 | 226 | goto reread; |
1da177e4 LT |
227 | } |
228 | ||
a1d86e8d | 229 | mp->m_features |= xfs_sb_version_to_features(sbp); |
5681ca40 | 230 | xfs_reinit_percpu_counters(mp); |
8d280b98 | 231 | |
04a1e6c5 DC |
232 | /* no need to be quiet anymore, so reset the buf ops */ |
233 | bp->b_ops = &xfs_sb_buf_ops; | |
234 | ||
1da177e4 | 235 | mp->m_sb_bp = bp; |
26af6552 | 236 | xfs_buf_unlock(bp); |
1da177e4 LT |
237 | return 0; |
238 | ||
26af6552 DC |
239 | release_buf: |
240 | xfs_buf_relse(bp); | |
1da177e4 LT |
241 | return error; |
242 | } | |
243 | ||
13eaec4b DW |
244 | /* |
245 | * If the sunit/swidth change would move the precomputed root inode value, we | |
246 | * must reject the ondisk change because repair will stumble over that. | |
247 | * However, we allow the mount to proceed because we never rejected this | |
248 | * combination before. Returns true to update the sb, false otherwise. | |
249 | */ | |
250 | static inline int | |
251 | xfs_check_new_dalign( | |
252 | struct xfs_mount *mp, | |
253 | int new_dalign, | |
254 | bool *update_sb) | |
255 | { | |
256 | struct xfs_sb *sbp = &mp->m_sb; | |
257 | xfs_ino_t calc_ino; | |
258 | ||
259 | calc_ino = xfs_ialloc_calc_rootino(mp, new_dalign); | |
260 | trace_xfs_check_new_dalign(mp, new_dalign, calc_ino); | |
261 | ||
262 | if (sbp->sb_rootino == calc_ino) { | |
263 | *update_sb = true; | |
264 | return 0; | |
265 | } | |
266 | ||
267 | xfs_warn(mp, | |
268 | "Cannot change stripe alignment; would require moving root inode."); | |
269 | ||
270 | /* | |
271 | * XXX: Next time we add a new incompat feature, this should start | |
272 | * returning -EINVAL to fail the mount. Until then, spit out a warning | |
273 | * that we're ignoring the administrator's instructions. | |
274 | */ | |
275 | xfs_warn(mp, "Skipping superblock stripe alignment update."); | |
276 | *update_sb = false; | |
277 | return 0; | |
278 | } | |
279 | ||
1da177e4 | 280 | /* |
4f5b1b3a DW |
281 | * If we were provided with new sunit/swidth values as mount options, make sure |
282 | * that they pass basic alignment and superblock feature checks, and convert | |
283 | * them into the same units (FSB) that everything else expects. This step | |
284 | * /must/ be done before computing the inode geometry. | |
1da177e4 | 285 | */ |
0771fb45 | 286 | STATIC int |
4f5b1b3a DW |
287 | xfs_validate_new_dalign( |
288 | struct xfs_mount *mp) | |
1da177e4 | 289 | { |
4f5b1b3a DW |
290 | if (mp->m_dalign == 0) |
291 | return 0; | |
1da177e4 | 292 | |
4f5b1b3a DW |
293 | /* |
294 | * If stripe unit and stripe width are not multiples | |
295 | * of the fs blocksize turn off alignment. | |
296 | */ | |
297 | if ((BBTOB(mp->m_dalign) & mp->m_blockmask) || | |
298 | (BBTOB(mp->m_swidth) & mp->m_blockmask)) { | |
299 | xfs_warn(mp, | |
300 | "alignment check failed: sunit/swidth vs. blocksize(%d)", | |
301 | mp->m_sb.sb_blocksize); | |
302 | return -EINVAL; | |
4f5b1b3a DW |
303 | } |
304 | ||
de94a2e1 ZH |
305 | /* |
306 | * Convert the stripe unit and width to FSBs. | |
307 | */ | |
308 | mp->m_dalign = XFS_BB_TO_FSBT(mp, mp->m_dalign); | |
309 | if (mp->m_dalign && (mp->m_sb.sb_agblocks % mp->m_dalign)) { | |
310 | xfs_warn(mp, | |
311 | "alignment check failed: sunit/swidth vs. agsize(%d)", | |
312 | mp->m_sb.sb_agblocks); | |
313 | return -EINVAL; | |
314 | } | |
315 | ||
316 | if (!mp->m_dalign) { | |
317 | xfs_warn(mp, | |
318 | "alignment check failed: sunit(%d) less than bsize(%d)", | |
319 | mp->m_dalign, mp->m_sb.sb_blocksize); | |
320 | return -EINVAL; | |
321 | } | |
322 | ||
323 | mp->m_swidth = XFS_BB_TO_FSBT(mp, mp->m_swidth); | |
324 | ||
38c26bfd | 325 | if (!xfs_has_dalign(mp)) { |
4f5b1b3a DW |
326 | xfs_warn(mp, |
327 | "cannot change alignment: superblock does not support data alignment"); | |
328 | return -EINVAL; | |
329 | } | |
330 | ||
331 | return 0; | |
332 | } | |
333 | ||
334 | /* Update alignment values based on mount options and sb values. */ | |
335 | STATIC int | |
336 | xfs_update_alignment( | |
337 | struct xfs_mount *mp) | |
338 | { | |
339 | struct xfs_sb *sbp = &mp->m_sb; | |
340 | ||
341 | if (mp->m_dalign) { | |
13eaec4b DW |
342 | bool update_sb; |
343 | int error; | |
344 | ||
4f5b1b3a DW |
345 | if (sbp->sb_unit == mp->m_dalign && |
346 | sbp->sb_width == mp->m_swidth) | |
347 | return 0; | |
348 | ||
13eaec4b DW |
349 | error = xfs_check_new_dalign(mp, mp->m_dalign, &update_sb); |
350 | if (error || !update_sb) | |
351 | return error; | |
352 | ||
4f5b1b3a DW |
353 | sbp->sb_unit = mp->m_dalign; |
354 | sbp->sb_width = mp->m_swidth; | |
355 | mp->m_update_sb = true; | |
0560f31a | 356 | } else if (!xfs_has_noalign(mp) && xfs_has_dalign(mp)) { |
4f5b1b3a DW |
357 | mp->m_dalign = sbp->sb_unit; |
358 | mp->m_swidth = sbp->sb_width; | |
1da177e4 LT |
359 | } |
360 | ||
0771fb45 ES |
361 | return 0; |
362 | } | |
1da177e4 | 363 | |
055388a3 DC |
364 | /* |
365 | * precalculate the low space thresholds for dynamic speculative preallocation. | |
366 | */ | |
367 | void | |
368 | xfs_set_low_space_thresholds( | |
369 | struct xfs_mount *mp) | |
370 | { | |
65f03d86 DW |
371 | uint64_t dblocks = mp->m_sb.sb_dblocks; |
372 | uint64_t rtexts = mp->m_sb.sb_rextents; | |
373 | int i; | |
055388a3 | 374 | |
65f03d86 DW |
375 | do_div(dblocks, 100); |
376 | do_div(rtexts, 100); | |
055388a3 | 377 | |
65f03d86 DW |
378 | for (i = 0; i < XFS_LOWSP_MAX; i++) { |
379 | mp->m_low_space[i] = dblocks * (i + 1); | |
380 | mp->m_low_rtexts[i] = rtexts * (i + 1); | |
055388a3 DC |
381 | } |
382 | } | |
383 | ||
0771fb45 | 384 | /* |
0471f62e | 385 | * Check that the data (and log if separate) is an ok size. |
0771fb45 ES |
386 | */ |
387 | STATIC int | |
ba372674 DC |
388 | xfs_check_sizes( |
389 | struct xfs_mount *mp) | |
0771fb45 | 390 | { |
ba372674 | 391 | struct xfs_buf *bp; |
0771fb45 | 392 | xfs_daddr_t d; |
ba372674 | 393 | int error; |
0771fb45 | 394 | |
1da177e4 LT |
395 | d = (xfs_daddr_t)XFS_FSB_TO_BB(mp, mp->m_sb.sb_dblocks); |
396 | if (XFS_BB_TO_FSB(mp, d) != mp->m_sb.sb_dblocks) { | |
0b932ccc | 397 | xfs_warn(mp, "filesystem size mismatch detected"); |
2451337d | 398 | return -EFBIG; |
1da177e4 | 399 | } |
ba372674 | 400 | error = xfs_buf_read_uncached(mp->m_ddev_targp, |
1922c949 | 401 | d - XFS_FSS_TO_BB(mp, 1), |
ba372674 DC |
402 | XFS_FSS_TO_BB(mp, 1), 0, &bp, NULL); |
403 | if (error) { | |
0b932ccc | 404 | xfs_warn(mp, "last sector read failed"); |
ba372674 | 405 | return error; |
1da177e4 | 406 | } |
1922c949 | 407 | xfs_buf_relse(bp); |
1da177e4 | 408 | |
ba372674 DC |
409 | if (mp->m_logdev_targp == mp->m_ddev_targp) |
410 | return 0; | |
411 | ||
412 | d = (xfs_daddr_t)XFS_FSB_TO_BB(mp, mp->m_sb.sb_logblocks); | |
413 | if (XFS_BB_TO_FSB(mp, d) != mp->m_sb.sb_logblocks) { | |
414 | xfs_warn(mp, "log size mismatch detected"); | |
415 | return -EFBIG; | |
416 | } | |
417 | error = xfs_buf_read_uncached(mp->m_logdev_targp, | |
1922c949 | 418 | d - XFS_FSB_TO_BB(mp, 1), |
ba372674 DC |
419 | XFS_FSB_TO_BB(mp, 1), 0, &bp, NULL); |
420 | if (error) { | |
421 | xfs_warn(mp, "log device read failed"); | |
422 | return error; | |
0771fb45 | 423 | } |
ba372674 | 424 | xfs_buf_relse(bp); |
0771fb45 ES |
425 | return 0; |
426 | } | |
427 | ||
7d095257 CH |
428 | /* |
429 | * Clear the quotaflags in memory and in the superblock. | |
430 | */ | |
431 | int | |
432 | xfs_mount_reset_sbqflags( | |
433 | struct xfs_mount *mp) | |
434 | { | |
7d095257 CH |
435 | mp->m_qflags = 0; |
436 | ||
61e63ecb | 437 | /* It is OK to look at sb_qflags in the mount path without m_sb_lock. */ |
7d095257 CH |
438 | if (mp->m_sb.sb_qflags == 0) |
439 | return 0; | |
440 | spin_lock(&mp->m_sb_lock); | |
441 | mp->m_sb.sb_qflags = 0; | |
442 | spin_unlock(&mp->m_sb_lock); | |
443 | ||
61e63ecb | 444 | if (!xfs_fs_writable(mp, SB_FREEZE_WRITE)) |
7d095257 CH |
445 | return 0; |
446 | ||
61e63ecb | 447 | return xfs_sync_sb(mp, false); |
7d095257 CH |
448 | } |
449 | ||
c8ce540d | 450 | uint64_t |
d5db0f97 ES |
451 | xfs_default_resblks(xfs_mount_t *mp) |
452 | { | |
c8ce540d | 453 | uint64_t resblks; |
d5db0f97 ES |
454 | |
455 | /* | |
8babd8a2 DC |
456 | * We default to 5% or 8192 fsbs of space reserved, whichever is |
457 | * smaller. This is intended to cover concurrent allocation | |
458 | * transactions when we initially hit enospc. These each require a 4 | |
459 | * block reservation. Hence by default we cover roughly 2000 concurrent | |
460 | * allocation reservations. | |
d5db0f97 ES |
461 | */ |
462 | resblks = mp->m_sb.sb_dblocks; | |
463 | do_div(resblks, 20); | |
c8ce540d | 464 | resblks = min_t(uint64_t, resblks, 8192); |
d5db0f97 ES |
465 | return resblks; |
466 | } | |
467 | ||
2e9e6481 DW |
468 | /* Ensure the summary counts are correct. */ |
469 | STATIC int | |
470 | xfs_check_summary_counts( | |
471 | struct xfs_mount *mp) | |
472 | { | |
5a605fd6 DW |
473 | int error = 0; |
474 | ||
2e9e6481 DW |
475 | /* |
476 | * The AG0 superblock verifier rejects in-progress filesystems, | |
477 | * so we should never see the flag set this far into mounting. | |
478 | */ | |
479 | if (mp->m_sb.sb_inprogress) { | |
480 | xfs_err(mp, "sb_inprogress set after log recovery??"); | |
481 | WARN_ON(1); | |
482 | return -EFSCORRUPTED; | |
483 | } | |
484 | ||
485 | /* | |
486 | * Now the log is mounted, we know if it was an unclean shutdown or | |
487 | * not. If it was, with the first phase of recovery has completed, we | |
488 | * have consistent AG blocks on disk. We have not recovered EFIs yet, | |
489 | * but they are recovered transactionally in the second recovery phase | |
490 | * later. | |
491 | * | |
492 | * If the log was clean when we mounted, we can check the summary | |
493 | * counters. If any of them are obviously incorrect, we can recompute | |
494 | * them from the AGF headers in the next step. | |
495 | */ | |
2e973b2c | 496 | if (xfs_is_clean(mp) && |
2e9e6481 | 497 | (mp->m_sb.sb_fdblocks > mp->m_sb.sb_dblocks || |
00d22a1c | 498 | !xfs_verify_icount(mp, mp->m_sb.sb_icount) || |
2e9e6481 | 499 | mp->m_sb.sb_ifree > mp->m_sb.sb_icount)) |
39353ff6 | 500 | xfs_fs_mark_sick(mp, XFS_SICK_FS_COUNTERS); |
2e9e6481 DW |
501 | |
502 | /* | |
503 | * We can safely re-initialise incore superblock counters from the | |
504 | * per-ag data. These may not be correct if the filesystem was not | |
505 | * cleanly unmounted, so we waited for recovery to finish before doing | |
506 | * this. | |
507 | * | |
508 | * If the filesystem was cleanly unmounted or the previous check did | |
509 | * not flag anything weird, then we can trust the values in the | |
510 | * superblock to be correct and we don't need to do anything here. | |
511 | * Otherwise, recalculate the summary counters. | |
512 | */ | |
5a605fd6 DW |
513 | if ((xfs_has_lazysbcount(mp) && !xfs_is_clean(mp)) || |
514 | xfs_fs_has_sickness(mp, XFS_SICK_FS_COUNTERS)) { | |
515 | error = xfs_initialize_perag_data(mp, mp->m_sb.sb_agcount); | |
516 | if (error) | |
517 | return error; | |
518 | } | |
519 | ||
520 | /* | |
521 | * Older kernels misused sb_frextents to reflect both incore | |
522 | * reservations made by running transactions and the actual count of | |
523 | * free rt extents in the ondisk metadata. Transactions committed | |
524 | * during runtime can therefore contain a superblock update that | |
525 | * undercounts the number of free rt extents tracked in the rt bitmap. | |
526 | * A clean unmount record will have the correct frextents value since | |
527 | * there can be no other transactions running at that point. | |
528 | * | |
529 | * If we're mounting the rt volume after recovering the log, recompute | |
530 | * frextents from the rtbitmap file to fix the inconsistency. | |
531 | */ | |
532 | if (xfs_has_realtime(mp) && !xfs_is_clean(mp)) { | |
533 | error = xfs_rtalloc_reinit_frextents(mp); | |
534 | if (error) | |
535 | return error; | |
536 | } | |
2e9e6481 | 537 | |
5a605fd6 | 538 | return 0; |
2e9e6481 DW |
539 | } |
540 | ||
59f6ab40 LL |
541 | static void |
542 | xfs_unmount_check( | |
543 | struct xfs_mount *mp) | |
544 | { | |
545 | if (xfs_is_shutdown(mp)) | |
546 | return; | |
547 | ||
548 | if (percpu_counter_sum(&mp->m_ifree) > | |
549 | percpu_counter_sum(&mp->m_icount)) { | |
550 | xfs_alert(mp, "ifree/icount mismatch at unmount"); | |
551 | xfs_fs_mark_sick(mp, XFS_SICK_FS_COUNTERS); | |
552 | } | |
553 | } | |
554 | ||
d336f7eb DW |
555 | /* |
556 | * Flush and reclaim dirty inodes in preparation for unmount. Inodes and | |
557 | * internal inode structures can be sitting in the CIL and AIL at this point, | |
558 | * so we need to unpin them, write them back and/or reclaim them before unmount | |
ab23a776 DC |
559 | * can proceed. In other words, callers are required to have inactivated all |
560 | * inodes. | |
d336f7eb DW |
561 | * |
562 | * An inode cluster that has been freed can have its buffer still pinned in | |
563 | * memory because the transaction is still sitting in a iclog. The stale inodes | |
564 | * on that buffer will be pinned to the buffer until the transaction hits the | |
565 | * disk and the callbacks run. Pushing the AIL will skip the stale inodes and | |
566 | * may never see the pinned buffer, so nothing will push out the iclog and | |
567 | * unpin the buffer. | |
568 | * | |
569 | * Hence we need to force the log to unpin everything first. However, log | |
570 | * forces don't wait for the discards they issue to complete, so we have to | |
571 | * explicitly wait for them to complete here as well. | |
572 | * | |
573 | * Then we can tell the world we are unmounting so that error handling knows | |
574 | * that the filesystem is going away and we should error out anything that we | |
575 | * have been retrying in the background. This will prevent never-ending | |
576 | * retries in AIL pushing from hanging the unmount. | |
577 | * | |
578 | * Finally, we can push the AIL to clean all the remaining dirty objects, then | |
579 | * reclaim the remaining inodes that are still in memory at this point in time. | |
580 | */ | |
581 | static void | |
582 | xfs_unmount_flush_inodes( | |
583 | struct xfs_mount *mp) | |
584 | { | |
585 | xfs_log_force(mp, XFS_LOG_SYNC); | |
586 | xfs_extent_busy_wait_all(mp); | |
587 | flush_workqueue(xfs_discard_wq); | |
588 | ||
2e973b2c | 589 | set_bit(XFS_OPSTATE_UNMOUNTING, &mp->m_opstate); |
d336f7eb DW |
590 | |
591 | xfs_ail_push_all_sync(mp->m_ail); | |
ab23a776 | 592 | xfs_inodegc_stop(mp); |
d336f7eb DW |
593 | cancel_delayed_work_sync(&mp->m_reclaim_work); |
594 | xfs_reclaim_inodes(mp); | |
595 | xfs_health_unmount(mp); | |
596 | } | |
597 | ||
b2941046 DC |
598 | static void |
599 | xfs_mount_setup_inode_geom( | |
600 | struct xfs_mount *mp) | |
601 | { | |
602 | struct xfs_ino_geometry *igeo = M_IGEO(mp); | |
603 | ||
604 | igeo->attr_fork_offset = xfs_bmap_compute_attr_offset(mp); | |
605 | ASSERT(igeo->attr_fork_offset < XFS_LITINO(mp)); | |
606 | ||
607 | xfs_ialloc_setup_geometry(mp); | |
608 | } | |
609 | ||
b74e15d7 DW |
610 | /* Compute maximum possible height for per-AG btree types for this fs. */ |
611 | static inline void | |
612 | xfs_agbtree_compute_maxlevels( | |
613 | struct xfs_mount *mp) | |
614 | { | |
615 | unsigned int levels; | |
616 | ||
617 | levels = max(mp->m_alloc_maxlevels, M_IGEO(mp)->inobt_maxlevels); | |
618 | levels = max(levels, mp->m_rmap_maxlevels); | |
619 | mp->m_agbtree_maxlevels = max(levels, mp->m_refc_maxlevels); | |
620 | } | |
621 | ||
0771fb45 | 622 | /* |
0771fb45 ES |
623 | * This function does the following on an initial mount of a file system: |
624 | * - reads the superblock from disk and init the mount struct | |
625 | * - if we're a 32-bit kernel, do a size check on the superblock | |
626 | * so we don't mount terabyte filesystems | |
627 | * - init mount struct realtime fields | |
628 | * - allocate inode hash table for fs | |
629 | * - init directory manager | |
630 | * - perform recovery and init the log manager | |
631 | */ | |
632 | int | |
633 | xfs_mountfs( | |
f0b2efad | 634 | struct xfs_mount *mp) |
0771fb45 | 635 | { |
f0b2efad BF |
636 | struct xfs_sb *sbp = &(mp->m_sb); |
637 | struct xfs_inode *rip; | |
ef325959 | 638 | struct xfs_ino_geometry *igeo = M_IGEO(mp); |
c8ce540d | 639 | uint64_t resblks; |
f0b2efad BF |
640 | uint quotamount = 0; |
641 | uint quotaflags = 0; | |
642 | int error = 0; | |
0771fb45 | 643 | |
ff55068c | 644 | xfs_sb_mount_common(mp, sbp); |
0771fb45 | 645 | |
ee1c0908 | 646 | /* |
074e427b DC |
647 | * Check for a mismatched features2 values. Older kernels read & wrote |
648 | * into the wrong sb offset for sb_features2 on some platforms due to | |
649 | * xfs_sb_t not being 64bit size aligned when sb_features2 was added, | |
650 | * which made older superblock reading/writing routines swap it as a | |
651 | * 64-bit value. | |
ee1c0908 | 652 | * |
e6957ea4 ES |
653 | * For backwards compatibility, we make both slots equal. |
654 | * | |
074e427b DC |
655 | * If we detect a mismatched field, we OR the set bits into the existing |
656 | * features2 field in case it has already been modified; we don't want | |
657 | * to lose any features. We then update the bad location with the ORed | |
658 | * value so that older kernels will see any features2 flags. The | |
659 | * superblock writeback code ensures the new sb_features2 is copied to | |
660 | * sb_bad_features2 before it is logged or written to disk. | |
ee1c0908 | 661 | */ |
e6957ea4 | 662 | if (xfs_sb_has_mismatched_features2(sbp)) { |
0b932ccc | 663 | xfs_warn(mp, "correcting sb_features alignment problem"); |
ee1c0908 | 664 | sbp->sb_features2 |= sbp->sb_bad_features2; |
61e63ecb | 665 | mp->m_update_sb = true; |
7c12f296 TS |
666 | } |
667 | ||
ee1c0908 | 668 | |
263997a6 DC |
669 | /* always use v2 inodes by default now */ |
670 | if (!(mp->m_sb.sb_versionnum & XFS_SB_VERSION_NLINKBIT)) { | |
671 | mp->m_sb.sb_versionnum |= XFS_SB_VERSION_NLINKBIT; | |
38c26bfd | 672 | mp->m_features |= XFS_FEAT_NLINK; |
61e63ecb | 673 | mp->m_update_sb = true; |
263997a6 DC |
674 | } |
675 | ||
0771fb45 | 676 | /* |
4f5b1b3a DW |
677 | * If we were given new sunit/swidth options, do some basic validation |
678 | * checks and convert the incore dalign and swidth values to the | |
679 | * same units (FSB) that everything else uses. This /must/ happen | |
680 | * before computing the inode geometry. | |
0771fb45 | 681 | */ |
4f5b1b3a | 682 | error = xfs_validate_new_dalign(mp); |
0771fb45 | 683 | if (error) |
f9057e3d | 684 | goto out; |
0771fb45 ES |
685 | |
686 | xfs_alloc_compute_maxlevels(mp); | |
687 | xfs_bmap_compute_maxlevels(mp, XFS_DATA_FORK); | |
688 | xfs_bmap_compute_maxlevels(mp, XFS_ATTR_FORK); | |
b2941046 | 689 | xfs_mount_setup_inode_geom(mp); |
035e00ac | 690 | xfs_rmapbt_compute_maxlevels(mp); |
1946b91c | 691 | xfs_refcountbt_compute_maxlevels(mp); |
0771fb45 | 692 | |
b74e15d7 DW |
693 | xfs_agbtree_compute_maxlevels(mp); |
694 | ||
4f5b1b3a DW |
695 | /* |
696 | * Check if sb_agblocks is aligned at stripe boundary. If sb_agblocks | |
697 | * is NOT aligned turn off m_dalign since allocator alignment is within | |
698 | * an ag, therefore ag has to be aligned at stripe boundary. Note that | |
699 | * we must compute the free space and rmap btree geometry before doing | |
700 | * this. | |
701 | */ | |
702 | error = xfs_update_alignment(mp); | |
703 | if (error) | |
704 | goto out; | |
705 | ||
e6b3bb78 | 706 | /* enable fail_at_unmount as default */ |
749f24f3 | 707 | mp->m_fail_unmount = true; |
e6b3bb78 | 708 | |
e1d3d218 IK |
709 | error = xfs_sysfs_init(&mp->m_kobj, &xfs_mp_ktype, |
710 | NULL, mp->m_super->s_id); | |
27174203 CH |
711 | if (error) |
712 | goto out; | |
1da177e4 | 713 | |
225e4635 BD |
714 | error = xfs_sysfs_init(&mp->m_stats.xs_kobj, &xfs_stats_ktype, |
715 | &mp->m_kobj, "stats"); | |
a31b1d3d BF |
716 | if (error) |
717 | goto out_remove_sysfs; | |
718 | ||
192852be | 719 | error = xfs_error_sysfs_init(mp); |
225e4635 BD |
720 | if (error) |
721 | goto out_del_stats; | |
722 | ||
31965ef3 DW |
723 | error = xfs_errortag_init(mp); |
724 | if (error) | |
725 | goto out_remove_error_sysfs; | |
192852be CM |
726 | |
727 | error = xfs_uuid_mount(mp); | |
728 | if (error) | |
31965ef3 | 729 | goto out_remove_errortag; |
192852be | 730 | |
0771fb45 | 731 | /* |
2fcddee8 CH |
732 | * Update the preferred write size based on the information from the |
733 | * on-disk superblock. | |
0771fb45 | 734 | */ |
2fcddee8 CH |
735 | mp->m_allocsize_log = |
736 | max_t(uint32_t, sbp->sb_blocklog, mp->m_allocsize_log); | |
737 | mp->m_allocsize_blocks = 1U << (mp->m_allocsize_log - sbp->sb_blocklog); | |
0771fb45 | 738 | |
055388a3 DC |
739 | /* set the low space thresholds for dynamic preallocation */ |
740 | xfs_set_low_space_thresholds(mp); | |
741 | ||
e5376fc1 BF |
742 | /* |
743 | * If enabled, sparse inode chunk alignment is expected to match the | |
744 | * cluster size. Full inode chunk alignment must match the chunk size, | |
745 | * but that is checked on sb read verification... | |
746 | */ | |
38c26bfd | 747 | if (xfs_has_sparseinodes(mp) && |
e5376fc1 | 748 | mp->m_sb.sb_spino_align != |
490d451f | 749 | XFS_B_TO_FSBT(mp, igeo->inode_cluster_size_raw)) { |
e5376fc1 BF |
750 | xfs_warn(mp, |
751 | "Sparse inode block alignment (%u) must match cluster size (%llu).", | |
752 | mp->m_sb.sb_spino_align, | |
490d451f | 753 | XFS_B_TO_FSBT(mp, igeo->inode_cluster_size_raw)); |
e5376fc1 BF |
754 | error = -EINVAL; |
755 | goto out_remove_uuid; | |
756 | } | |
757 | ||
0771fb45 | 758 | /* |
c2bfbc9b | 759 | * Check that the data (and log if separate) is an ok size. |
0771fb45 | 760 | */ |
4249023a | 761 | error = xfs_check_sizes(mp); |
0771fb45 | 762 | if (error) |
f9057e3d | 763 | goto out_remove_uuid; |
0771fb45 | 764 | |
1da177e4 LT |
765 | /* |
766 | * Initialize realtime fields in the mount structure | |
767 | */ | |
0771fb45 ES |
768 | error = xfs_rtmount_init(mp); |
769 | if (error) { | |
0b932ccc | 770 | xfs_warn(mp, "RT mount failed"); |
f9057e3d | 771 | goto out_remove_uuid; |
1da177e4 LT |
772 | } |
773 | ||
1da177e4 LT |
774 | /* |
775 | * Copies the low order bits of the timestamp and the randomly | |
776 | * set "sequence" number out of a UUID. | |
777 | */ | |
cb0ba6cc CH |
778 | mp->m_fixedfsid[0] = |
779 | (get_unaligned_be16(&sbp->sb_uuid.b[8]) << 16) | | |
780 | get_unaligned_be16(&sbp->sb_uuid.b[4]); | |
781 | mp->m_fixedfsid[1] = get_unaligned_be32(&sbp->sb_uuid.b[0]); | |
1da177e4 | 782 | |
0650b554 DC |
783 | error = xfs_da_mount(mp); |
784 | if (error) { | |
785 | xfs_warn(mp, "Failed dir/attr init: %d", error); | |
786 | goto out_remove_uuid; | |
787 | } | |
1da177e4 LT |
788 | |
789 | /* | |
790 | * Initialize the precomputed transaction reservations values. | |
791 | */ | |
792 | xfs_trans_init(mp); | |
793 | ||
1da177e4 LT |
794 | /* |
795 | * Allocate and initialize the per-ag data. | |
796 | */ | |
0800169e DC |
797 | error = xfs_initialize_perag(mp, sbp->sb_agcount, mp->m_sb.sb_dblocks, |
798 | &mp->m_maxagi); | |
1c1c6ebc | 799 | if (error) { |
0b932ccc | 800 | xfs_warn(mp, "Failed per-ag init: %d", error); |
0650b554 | 801 | goto out_free_dir; |
1c1c6ebc | 802 | } |
1da177e4 | 803 | |
a71895c5 | 804 | if (XFS_IS_CORRUPT(mp, !sbp->sb_logblocks)) { |
0b932ccc | 805 | xfs_warn(mp, "no log defined"); |
2451337d | 806 | error = -EFSCORRUPTED; |
f9057e3d CH |
807 | goto out_free_perag; |
808 | } | |
809 | ||
40b1de00 DW |
810 | error = xfs_inodegc_register_shrinker(mp); |
811 | if (error) | |
812 | goto out_fail_wait; | |
813 | ||
1da177e4 | 814 | /* |
f0b2efad BF |
815 | * Log's mount-time initialization. The first part of recovery can place |
816 | * some items on the AIL, to be handled when recovery is finished or | |
817 | * cancelled. | |
1da177e4 | 818 | */ |
f9057e3d CH |
819 | error = xfs_log_mount(mp, mp->m_logdev_targp, |
820 | XFS_FSB_TO_DADDR(mp, sbp->sb_logstart), | |
821 | XFS_FSB_TO_BB(mp, sbp->sb_logblocks)); | |
822 | if (error) { | |
0b932ccc | 823 | xfs_warn(mp, "log mount failed"); |
40b1de00 | 824 | goto out_inodegc_shrinker; |
1da177e4 LT |
825 | } |
826 | ||
ab23a776 DC |
827 | /* Enable background inode inactivation workers. */ |
828 | xfs_inodegc_start(mp); | |
6f649091 | 829 | xfs_blockgc_start(mp); |
ab23a776 | 830 | |
e23b55d5 DC |
831 | /* |
832 | * Now that we've recovered any pending superblock feature bit | |
833 | * additions, we can finish setting up the attr2 behaviour for the | |
0560f31a DC |
834 | * mount. The noattr2 option overrides the superblock flag, so only |
835 | * check the superblock feature flag if the mount option is not set. | |
e23b55d5 | 836 | */ |
0560f31a DC |
837 | if (xfs_has_noattr2(mp)) { |
838 | mp->m_features &= ~XFS_FEAT_ATTR2; | |
839 | } else if (!xfs_has_attr2(mp) && | |
840 | (mp->m_sb.sb_features2 & XFS_SB_VERSION2_ATTR2BIT)) { | |
841 | mp->m_features |= XFS_FEAT_ATTR2; | |
842 | } | |
e23b55d5 | 843 | |
1da177e4 LT |
844 | /* |
845 | * Get and sanity-check the root inode. | |
846 | * Save the pointer to it in the mount structure. | |
847 | */ | |
541b5acc DC |
848 | error = xfs_iget(mp, NULL, sbp->sb_rootino, XFS_IGET_UNTRUSTED, |
849 | XFS_ILOCK_EXCL, &rip); | |
1da177e4 | 850 | if (error) { |
541b5acc DC |
851 | xfs_warn(mp, |
852 | "Failed to read root inode 0x%llx, error %d", | |
853 | sbp->sb_rootino, -error); | |
f9057e3d | 854 | goto out_log_dealloc; |
1da177e4 LT |
855 | } |
856 | ||
857 | ASSERT(rip != NULL); | |
1da177e4 | 858 | |
a71895c5 | 859 | if (XFS_IS_CORRUPT(mp, !S_ISDIR(VFS_I(rip)->i_mode))) { |
0b932ccc | 860 | xfs_warn(mp, "corrupted root inode %llu: not a directory", |
b6574520 | 861 | (unsigned long long)rip->i_ino); |
1da177e4 | 862 | xfs_iunlock(rip, XFS_ILOCK_EXCL); |
2451337d | 863 | error = -EFSCORRUPTED; |
f9057e3d | 864 | goto out_rele_rip; |
1da177e4 LT |
865 | } |
866 | mp->m_rootip = rip; /* save it */ | |
867 | ||
868 | xfs_iunlock(rip, XFS_ILOCK_EXCL); | |
869 | ||
870 | /* | |
871 | * Initialize realtime inode pointers in the mount structure | |
872 | */ | |
0771fb45 ES |
873 | error = xfs_rtmount_inodes(mp); |
874 | if (error) { | |
1da177e4 LT |
875 | /* |
876 | * Free up the root inode. | |
877 | */ | |
0b932ccc | 878 | xfs_warn(mp, "failed to read RT inodes"); |
f9057e3d | 879 | goto out_rele_rip; |
1da177e4 LT |
880 | } |
881 | ||
5a605fd6 DW |
882 | /* Make sure the summary counts are ok. */ |
883 | error = xfs_check_summary_counts(mp); | |
884 | if (error) | |
885 | goto out_rtunmount; | |
886 | ||
1da177e4 | 887 | /* |
7884bc86 CH |
888 | * If this is a read-only mount defer the superblock updates until |
889 | * the next remount into writeable mode. Otherwise we would never | |
890 | * perform the update e.g. for the root filesystem. | |
1da177e4 | 891 | */ |
2e973b2c | 892 | if (mp->m_update_sb && !xfs_is_readonly(mp)) { |
61e63ecb | 893 | error = xfs_sync_sb(mp, false); |
e5720eec | 894 | if (error) { |
0b932ccc | 895 | xfs_warn(mp, "failed to write sb changes"); |
b93b6e43 | 896 | goto out_rtunmount; |
e5720eec DC |
897 | } |
898 | } | |
1da177e4 LT |
899 | |
900 | /* | |
901 | * Initialise the XFS quota management subsystem for this mount | |
902 | */ | |
149e53af | 903 | if (XFS_IS_QUOTA_ON(mp)) { |
7d095257 CH |
904 | error = xfs_qm_newmount(mp, "amount, "aflags); |
905 | if (error) | |
906 | goto out_rtunmount; | |
907 | } else { | |
7d095257 CH |
908 | /* |
909 | * If a file system had quotas running earlier, but decided to | |
910 | * mount without -o uquota/pquota/gquota options, revoke the | |
911 | * quotachecked license. | |
912 | */ | |
913 | if (mp->m_sb.sb_qflags & XFS_ALL_QUOTA_ACCT) { | |
0b932ccc | 914 | xfs_notice(mp, "resetting quota flags"); |
7d095257 CH |
915 | error = xfs_mount_reset_sbqflags(mp); |
916 | if (error) | |
a70a4fa5 | 917 | goto out_rtunmount; |
7d095257 CH |
918 | } |
919 | } | |
1da177e4 LT |
920 | |
921 | /* | |
f0b2efad BF |
922 | * Finish recovering the file system. This part needed to be delayed |
923 | * until after the root and real-time bitmap inodes were consistently | |
81ed9475 DW |
924 | * read in. Temporarily create per-AG space reservations for metadata |
925 | * btree shape changes because space freeing transactions (for inode | |
926 | * inactivation) require the per-AG reservation in lieu of reserving | |
927 | * blocks. | |
1da177e4 | 928 | */ |
81ed9475 DW |
929 | error = xfs_fs_reserve_ag_blocks(mp); |
930 | if (error && error == -ENOSPC) | |
931 | xfs_warn(mp, | |
932 | "ENOSPC reserving per-AG metadata pool, log recovery may fail."); | |
4249023a | 933 | error = xfs_log_mount_finish(mp); |
81ed9475 | 934 | xfs_fs_unreserve_ag_blocks(mp); |
1da177e4 | 935 | if (error) { |
0b932ccc | 936 | xfs_warn(mp, "log mount finish failed"); |
b93b6e43 | 937 | goto out_rtunmount; |
1da177e4 LT |
938 | } |
939 | ||
ddeb14f4 DC |
940 | /* |
941 | * Now the log is fully replayed, we can transition to full read-only | |
942 | * mode for read-only mounts. This will sync all the metadata and clean | |
943 | * the log so that the recovery we just performed does not have to be | |
944 | * replayed again on the next mount. | |
945 | * | |
946 | * We use the same quiesce mechanism as the rw->ro remount, as they are | |
947 | * semantically identical operations. | |
948 | */ | |
2e973b2c | 949 | if (xfs_is_readonly(mp) && !xfs_has_norecovery(mp)) |
ea2064da | 950 | xfs_log_clean(mp); |
ddeb14f4 | 951 | |
1da177e4 LT |
952 | /* |
953 | * Complete the quota initialisation, post-log-replay component. | |
954 | */ | |
7d095257 CH |
955 | if (quotamount) { |
956 | ASSERT(mp->m_qflags == 0); | |
957 | mp->m_qflags = quotaflags; | |
958 | ||
959 | xfs_qm_mount_quotas(mp); | |
960 | } | |
961 | ||
84e1e99f DC |
962 | /* |
963 | * Now we are mounted, reserve a small amount of unused space for | |
964 | * privileged transactions. This is needed so that transaction | |
965 | * space required for critical operations can dip into this pool | |
966 | * when at ENOSPC. This is needed for operations like create with | |
967 | * attr, unwritten extent conversion at ENOSPC, etc. Data allocations | |
968 | * are not allowed to use this reserved space. | |
8babd8a2 DC |
969 | * |
970 | * This may drive us straight to ENOSPC on mount, but that implies | |
971 | * we were already there on the last unmount. Warn if this occurs. | |
84e1e99f | 972 | */ |
2e973b2c | 973 | if (!xfs_is_readonly(mp)) { |
d5db0f97 ES |
974 | resblks = xfs_default_resblks(mp); |
975 | error = xfs_reserve_blocks(mp, &resblks, NULL); | |
976 | if (error) | |
0b932ccc DC |
977 | xfs_warn(mp, |
978 | "Unable to allocate reserve blocks. Continuing without reserve pool."); | |
174edb0e | 979 | |
84d69619 DW |
980 | /* Reserve AG blocks for future btree expansion. */ |
981 | error = xfs_fs_reserve_ag_blocks(mp); | |
982 | if (error && error != -ENOSPC) | |
983 | goto out_agresv; | |
d5db0f97 | 984 | } |
84e1e99f | 985 | |
1da177e4 LT |
986 | return 0; |
987 | ||
84d69619 DW |
988 | out_agresv: |
989 | xfs_fs_unreserve_ag_blocks(mp); | |
174edb0e | 990 | xfs_qm_unmount_quotas(mp); |
b93b6e43 CH |
991 | out_rtunmount: |
992 | xfs_rtunmount_inodes(mp); | |
f9057e3d | 993 | out_rele_rip: |
44a8736b | 994 | xfs_irele(rip); |
77aff8c7 DW |
995 | /* Clean out dquots that might be in memory after quotacheck. */ |
996 | xfs_qm_unmount(mp); | |
ab23a776 DC |
997 | |
998 | /* | |
999 | * Inactivate all inodes that might still be in memory after a log | |
1000 | * intent recovery failure so that reclaim can free them. Metadata | |
1001 | * inodes and the root directory shouldn't need inactivation, but the | |
1002 | * mount failed for some reason, so pull down all the state and flee. | |
1003 | */ | |
1004 | xfs_inodegc_flush(mp); | |
1005 | ||
2d1d1da3 | 1006 | /* |
d336f7eb | 1007 | * Flush all inode reclamation work and flush the log. |
2d1d1da3 DW |
1008 | * We have to do this /after/ rtunmount and qm_unmount because those |
1009 | * two will have scheduled delayed reclaim for the rt/quota inodes. | |
1010 | * | |
1011 | * This is slightly different from the unmountfs call sequence | |
1012 | * because we could be tearing down a partially set up mount. In | |
1013 | * particular, if log_mount_finish fails we bail out without calling | |
1014 | * qm_unmount_quotas and therefore rely on qm_unmount to release the | |
1015 | * quota inodes. | |
1016 | */ | |
d336f7eb | 1017 | xfs_unmount_flush_inodes(mp); |
f9057e3d | 1018 | out_log_dealloc: |
f0b2efad | 1019 | xfs_log_mount_cancel(mp); |
40b1de00 DW |
1020 | out_inodegc_shrinker: |
1021 | unregister_shrinker(&mp->m_inodegc_shrinker); | |
d4f3512b DC |
1022 | out_fail_wait: |
1023 | if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp) | |
10fb9ac1 BF |
1024 | xfs_buftarg_drain(mp->m_logdev_targp); |
1025 | xfs_buftarg_drain(mp->m_ddev_targp); | |
f9057e3d | 1026 | out_free_perag: |
ff4f038c | 1027 | xfs_free_perag(mp); |
0650b554 DC |
1028 | out_free_dir: |
1029 | xfs_da_unmount(mp); | |
f9057e3d | 1030 | out_remove_uuid: |
27174203 | 1031 | xfs_uuid_unmount(mp); |
31965ef3 DW |
1032 | out_remove_errortag: |
1033 | xfs_errortag_del(mp); | |
192852be CM |
1034 | out_remove_error_sysfs: |
1035 | xfs_error_sysfs_del(mp); | |
225e4635 BD |
1036 | out_del_stats: |
1037 | xfs_sysfs_del(&mp->m_stats.xs_kobj); | |
a31b1d3d BF |
1038 | out_remove_sysfs: |
1039 | xfs_sysfs_del(&mp->m_kobj); | |
f9057e3d | 1040 | out: |
1da177e4 LT |
1041 | return error; |
1042 | } | |
1043 | ||
1044 | /* | |
1da177e4 LT |
1045 | * This flushes out the inodes,dquots and the superblock, unmounts the |
1046 | * log and makes sure that incore structures are freed. | |
1047 | */ | |
41b5c2e7 CH |
1048 | void |
1049 | xfs_unmountfs( | |
1050 | struct xfs_mount *mp) | |
1da177e4 | 1051 | { |
c8ce540d | 1052 | uint64_t resblks; |
41b5c2e7 | 1053 | int error; |
1da177e4 | 1054 | |
ab23a776 DC |
1055 | /* |
1056 | * Perform all on-disk metadata updates required to inactivate inodes | |
1057 | * that the VFS evicted earlier in the unmount process. Freeing inodes | |
1058 | * and discarding CoW fork preallocations can cause shape changes to | |
1059 | * the free inode and refcount btrees, respectively, so we must finish | |
1060 | * this before we discard the metadata space reservations. Metadata | |
1061 | * inodes and the root directory do not require inactivation. | |
1062 | */ | |
1063 | xfs_inodegc_flush(mp); | |
1064 | ||
c9a6526f | 1065 | xfs_blockgc_stop(mp); |
84d69619 | 1066 | xfs_fs_unreserve_ag_blocks(mp); |
7d095257 | 1067 | xfs_qm_unmount_quotas(mp); |
b93b6e43 | 1068 | xfs_rtunmount_inodes(mp); |
44a8736b | 1069 | xfs_irele(mp->m_rootip); |
77508ec8 | 1070 | |
d336f7eb | 1071 | xfs_unmount_flush_inodes(mp); |
1da177e4 | 1072 | |
7d095257 | 1073 | xfs_qm_unmount(mp); |
a357a121 | 1074 | |
84e1e99f DC |
1075 | /* |
1076 | * Unreserve any blocks we have so that when we unmount we don't account | |
1077 | * the reserved free space as used. This is really only necessary for | |
1078 | * lazy superblock counting because it trusts the incore superblock | |
9da096fd | 1079 | * counters to be absolutely correct on clean unmount. |
84e1e99f DC |
1080 | * |
1081 | * We don't bother correcting this elsewhere for lazy superblock | |
1082 | * counting because on mount of an unclean filesystem we reconstruct the | |
1083 | * correct counter value and this is irrelevant. | |
1084 | * | |
1085 | * For non-lazy counter filesystems, this doesn't matter at all because | |
1086 | * we only every apply deltas to the superblock and hence the incore | |
1087 | * value does not matter.... | |
1088 | */ | |
1089 | resblks = 0; | |
714082bc DC |
1090 | error = xfs_reserve_blocks(mp, &resblks, NULL); |
1091 | if (error) | |
0b932ccc | 1092 | xfs_warn(mp, "Unable to free reserved block pool. " |
714082bc | 1093 | "Freespace may not be correct on next mount."); |
59f6ab40 | 1094 | xfs_unmount_check(mp); |
714082bc | 1095 | |
21b699c8 | 1096 | xfs_log_unmount(mp); |
0650b554 | 1097 | xfs_da_unmount(mp); |
27174203 | 1098 | xfs_uuid_unmount(mp); |
1da177e4 | 1099 | |
1550d0b0 | 1100 | #if defined(DEBUG) |
31965ef3 | 1101 | xfs_errortag_clearall(mp); |
1da177e4 | 1102 | #endif |
40b1de00 | 1103 | unregister_shrinker(&mp->m_inodegc_shrinker); |
ff4f038c | 1104 | xfs_free_perag(mp); |
a31b1d3d | 1105 | |
31965ef3 | 1106 | xfs_errortag_del(mp); |
192852be | 1107 | xfs_error_sysfs_del(mp); |
225e4635 | 1108 | xfs_sysfs_del(&mp->m_stats.xs_kobj); |
a31b1d3d | 1109 | xfs_sysfs_del(&mp->m_kobj); |
1da177e4 LT |
1110 | } |
1111 | ||
91ee575f BF |
1112 | /* |
1113 | * Determine whether modifications can proceed. The caller specifies the minimum | |
1114 | * freeze level for which modifications should not be allowed. This allows | |
1115 | * certain operations to proceed while the freeze sequence is in progress, if | |
1116 | * necessary. | |
1117 | */ | |
1118 | bool | |
1119 | xfs_fs_writable( | |
1120 | struct xfs_mount *mp, | |
1121 | int level) | |
92821e2b | 1122 | { |
91ee575f BF |
1123 | ASSERT(level > SB_UNFROZEN); |
1124 | if ((mp->m_super->s_writers.frozen >= level) || | |
75c8c50f | 1125 | xfs_is_shutdown(mp) || xfs_is_readonly(mp)) |
91ee575f BF |
1126 | return false; |
1127 | ||
1128 | return true; | |
92821e2b DC |
1129 | } |
1130 | ||
2229276c | 1131 | /* Adjust m_fdblocks or m_frextents. */ |
0d485ada | 1132 | int |
2229276c | 1133 | xfs_mod_freecounter( |
0d485ada | 1134 | struct xfs_mount *mp, |
2229276c | 1135 | struct percpu_counter *counter, |
0d485ada DC |
1136 | int64_t delta, |
1137 | bool rsvd) | |
1138 | { | |
1139 | int64_t lcounter; | |
1140 | long long res_used; | |
2229276c | 1141 | uint64_t set_aside = 0; |
0d485ada | 1142 | s32 batch; |
2229276c DW |
1143 | bool has_resv_pool; |
1144 | ||
1145 | ASSERT(counter == &mp->m_fdblocks || counter == &mp->m_frextents); | |
1146 | has_resv_pool = (counter == &mp->m_fdblocks); | |
1147 | if (rsvd) | |
1148 | ASSERT(has_resv_pool); | |
0d485ada DC |
1149 | |
1150 | if (delta > 0) { | |
1151 | /* | |
1152 | * If the reserve pool is depleted, put blocks back into it | |
1153 | * first. Most of the time the pool is full. | |
1154 | */ | |
2229276c DW |
1155 | if (likely(!has_resv_pool || |
1156 | mp->m_resblks == mp->m_resblks_avail)) { | |
1157 | percpu_counter_add(counter, delta); | |
0d485ada DC |
1158 | return 0; |
1159 | } | |
1160 | ||
1161 | spin_lock(&mp->m_sb_lock); | |
1162 | res_used = (long long)(mp->m_resblks - mp->m_resblks_avail); | |
1163 | ||
1164 | if (res_used > delta) { | |
1165 | mp->m_resblks_avail += delta; | |
1166 | } else { | |
1167 | delta -= res_used; | |
1168 | mp->m_resblks_avail = mp->m_resblks; | |
2229276c | 1169 | percpu_counter_add(counter, delta); |
0d485ada DC |
1170 | } |
1171 | spin_unlock(&mp->m_sb_lock); | |
1172 | return 0; | |
1173 | } | |
1174 | ||
1175 | /* | |
1176 | * Taking blocks away, need to be more accurate the closer we | |
1177 | * are to zero. | |
1178 | * | |
0d485ada DC |
1179 | * If the counter has a value of less than 2 * max batch size, |
1180 | * then make everything serialise as we are real close to | |
1181 | * ENOSPC. | |
1182 | */ | |
2229276c | 1183 | if (__percpu_counter_compare(counter, 2 * XFS_FDBLOCKS_BATCH, |
8c1903d3 | 1184 | XFS_FDBLOCKS_BATCH) < 0) |
0d485ada DC |
1185 | batch = 1; |
1186 | else | |
8c1903d3 | 1187 | batch = XFS_FDBLOCKS_BATCH; |
0d485ada | 1188 | |
fd43cf60 BF |
1189 | /* |
1190 | * Set aside allocbt blocks because these blocks are tracked as free | |
1191 | * space but not available for allocation. Technically this means that a | |
1192 | * single reservation cannot consume all remaining free space, but the | |
1193 | * ratio of allocbt blocks to usable free blocks should be rather small. | |
1194 | * The tradeoff without this is that filesystems that maintain high | |
1195 | * perag block reservations can over reserve physical block availability | |
1196 | * and fail physical allocation, which leads to much more serious | |
1197 | * problems (i.e. transaction abort, pagecache discards, etc.) than | |
1198 | * slightly premature -ENOSPC. | |
1199 | */ | |
2229276c DW |
1200 | if (has_resv_pool) |
1201 | set_aside = xfs_fdblocks_unavailable(mp); | |
1202 | percpu_counter_add_batch(counter, delta, batch); | |
1203 | if (__percpu_counter_compare(counter, set_aside, | |
8c1903d3 | 1204 | XFS_FDBLOCKS_BATCH) >= 0) { |
0d485ada DC |
1205 | /* we had space! */ |
1206 | return 0; | |
1207 | } | |
1208 | ||
1209 | /* | |
1210 | * lock up the sb for dipping into reserves before releasing the space | |
1211 | * that took us to ENOSPC. | |
1212 | */ | |
1213 | spin_lock(&mp->m_sb_lock); | |
2229276c DW |
1214 | percpu_counter_add(counter, -delta); |
1215 | if (!has_resv_pool || !rsvd) | |
0d485ada DC |
1216 | goto fdblocks_enospc; |
1217 | ||
1218 | lcounter = (long long)mp->m_resblks_avail + delta; | |
1219 | if (lcounter >= 0) { | |
1220 | mp->m_resblks_avail = lcounter; | |
1221 | spin_unlock(&mp->m_sb_lock); | |
1222 | return 0; | |
1223 | } | |
ec43f6da ES |
1224 | xfs_warn_once(mp, |
1225 | "Reserve blocks depleted! Consider increasing reserve pool size."); | |
1226 | ||
0d485ada DC |
1227 | fdblocks_enospc: |
1228 | spin_unlock(&mp->m_sb_lock); | |
1229 | return -ENOSPC; | |
1230 | } | |
1231 | ||
1da177e4 LT |
1232 | /* |
1233 | * Used to free the superblock along various error paths. | |
1234 | */ | |
1235 | void | |
1236 | xfs_freesb( | |
26af6552 | 1237 | struct xfs_mount *mp) |
1da177e4 | 1238 | { |
26af6552 | 1239 | struct xfs_buf *bp = mp->m_sb_bp; |
1da177e4 | 1240 | |
26af6552 | 1241 | xfs_buf_lock(bp); |
1da177e4 | 1242 | mp->m_sb_bp = NULL; |
26af6552 | 1243 | xfs_buf_relse(bp); |
1da177e4 LT |
1244 | } |
1245 | ||
dda35b8f CH |
1246 | /* |
1247 | * If the underlying (data/log/rt) device is readonly, there are some | |
1248 | * operations that cannot proceed. | |
1249 | */ | |
1250 | int | |
1251 | xfs_dev_is_read_only( | |
1252 | struct xfs_mount *mp, | |
1253 | char *message) | |
1254 | { | |
1255 | if (xfs_readonly_buftarg(mp->m_ddev_targp) || | |
1256 | xfs_readonly_buftarg(mp->m_logdev_targp) || | |
1257 | (mp->m_rtdev_targp && xfs_readonly_buftarg(mp->m_rtdev_targp))) { | |
0b932ccc DC |
1258 | xfs_notice(mp, "%s required on read-only device.", message); |
1259 | xfs_notice(mp, "write access unavailable, cannot proceed."); | |
2451337d | 1260 | return -EROFS; |
dda35b8f CH |
1261 | } |
1262 | return 0; | |
1263 | } | |
f467cad9 DW |
1264 | |
1265 | /* Force the summary counters to be recalculated at next mount. */ | |
1266 | void | |
1267 | xfs_force_summary_recalc( | |
1268 | struct xfs_mount *mp) | |
1269 | { | |
38c26bfd | 1270 | if (!xfs_has_lazysbcount(mp)) |
f467cad9 DW |
1271 | return; |
1272 | ||
39353ff6 | 1273 | xfs_fs_mark_sick(mp, XFS_SICK_FS_COUNTERS); |
f467cad9 | 1274 | } |
9fe82b8c | 1275 | |
908ce71e DW |
1276 | /* |
1277 | * Enable a log incompat feature flag in the primary superblock. The caller | |
1278 | * cannot have any other transactions in progress. | |
1279 | */ | |
1280 | int | |
1281 | xfs_add_incompat_log_feature( | |
1282 | struct xfs_mount *mp, | |
1283 | uint32_t feature) | |
1284 | { | |
1285 | struct xfs_dsb *dsb; | |
1286 | int error; | |
1287 | ||
1288 | ASSERT(hweight32(feature) == 1); | |
1289 | ASSERT(!(feature & XFS_SB_FEAT_INCOMPAT_LOG_UNKNOWN)); | |
1290 | ||
1291 | /* | |
1292 | * Force the log to disk and kick the background AIL thread to reduce | |
1293 | * the chances that the bwrite will stall waiting for the AIL to unpin | |
1294 | * the primary superblock buffer. This isn't a data integrity | |
1295 | * operation, so we don't need a synchronous push. | |
1296 | */ | |
1297 | error = xfs_log_force(mp, XFS_LOG_SYNC); | |
1298 | if (error) | |
1299 | return error; | |
1300 | xfs_ail_push_all(mp->m_ail); | |
1301 | ||
1302 | /* | |
1303 | * Lock the primary superblock buffer to serialize all callers that | |
1304 | * are trying to set feature bits. | |
1305 | */ | |
1306 | xfs_buf_lock(mp->m_sb_bp); | |
1307 | xfs_buf_hold(mp->m_sb_bp); | |
1308 | ||
75c8c50f | 1309 | if (xfs_is_shutdown(mp)) { |
908ce71e DW |
1310 | error = -EIO; |
1311 | goto rele; | |
1312 | } | |
1313 | ||
1314 | if (xfs_sb_has_incompat_log_feature(&mp->m_sb, feature)) | |
1315 | goto rele; | |
1316 | ||
1317 | /* | |
1318 | * Write the primary superblock to disk immediately, because we need | |
1319 | * the log_incompat bit to be set in the primary super now to protect | |
1320 | * the log items that we're going to commit later. | |
1321 | */ | |
1322 | dsb = mp->m_sb_bp->b_addr; | |
1323 | xfs_sb_to_disk(dsb, &mp->m_sb); | |
1324 | dsb->sb_features_log_incompat |= cpu_to_be32(feature); | |
1325 | error = xfs_bwrite(mp->m_sb_bp); | |
1326 | if (error) | |
1327 | goto shutdown; | |
1328 | ||
1329 | /* | |
1330 | * Add the feature bits to the incore superblock before we unlock the | |
1331 | * buffer. | |
1332 | */ | |
1333 | xfs_sb_add_incompat_log_features(&mp->m_sb, feature); | |
1334 | xfs_buf_relse(mp->m_sb_bp); | |
1335 | ||
1336 | /* Log the superblock to disk. */ | |
1337 | return xfs_sync_sb(mp, false); | |
1338 | shutdown: | |
1339 | xfs_force_shutdown(mp, SHUTDOWN_META_IO_ERROR); | |
1340 | rele: | |
1341 | xfs_buf_relse(mp->m_sb_bp); | |
1342 | return error; | |
1343 | } | |
1344 | ||
1345 | /* | |
1346 | * Clear all the log incompat flags from the superblock. | |
1347 | * | |
1348 | * The caller cannot be in a transaction, must ensure that the log does not | |
1349 | * contain any log items protected by any log incompat bit, and must ensure | |
1350 | * that there are no other threads that depend on the state of the log incompat | |
1351 | * feature flags in the primary super. | |
1352 | * | |
1353 | * Returns true if the superblock is dirty. | |
1354 | */ | |
1355 | bool | |
1356 | xfs_clear_incompat_log_features( | |
1357 | struct xfs_mount *mp) | |
1358 | { | |
1359 | bool ret = false; | |
1360 | ||
ebd9027d | 1361 | if (!xfs_has_crc(mp) || |
908ce71e DW |
1362 | !xfs_sb_has_incompat_log_feature(&mp->m_sb, |
1363 | XFS_SB_FEAT_INCOMPAT_LOG_ALL) || | |
75c8c50f | 1364 | xfs_is_shutdown(mp)) |
908ce71e DW |
1365 | return false; |
1366 | ||
1367 | /* | |
1368 | * Update the incore superblock. We synchronize on the primary super | |
1369 | * buffer lock to be consistent with the add function, though at least | |
1370 | * in theory this shouldn't be necessary. | |
1371 | */ | |
1372 | xfs_buf_lock(mp->m_sb_bp); | |
1373 | xfs_buf_hold(mp->m_sb_bp); | |
1374 | ||
1375 | if (xfs_sb_has_incompat_log_feature(&mp->m_sb, | |
1376 | XFS_SB_FEAT_INCOMPAT_LOG_ALL)) { | |
908ce71e DW |
1377 | xfs_sb_remove_incompat_log_features(&mp->m_sb); |
1378 | ret = true; | |
1379 | } | |
1380 | ||
1381 | xfs_buf_relse(mp->m_sb_bp); | |
1382 | return ret; | |
1383 | } | |
1384 | ||
9fe82b8c DW |
1385 | /* |
1386 | * Update the in-core delayed block counter. | |
1387 | * | |
1388 | * We prefer to update the counter without having to take a spinlock for every | |
1389 | * counter update (i.e. batching). Each change to delayed allocation | |
1390 | * reservations can change can easily exceed the default percpu counter | |
1391 | * batching, so we use a larger batch factor here. | |
1392 | * | |
1393 | * Note that we don't currently have any callers requiring fast summation | |
1394 | * (e.g. percpu_counter_read) so we can use a big batch value here. | |
1395 | */ | |
1396 | #define XFS_DELALLOC_BATCH (4096) | |
1397 | void | |
1398 | xfs_mod_delalloc( | |
1399 | struct xfs_mount *mp, | |
1400 | int64_t delta) | |
1401 | { | |
1402 | percpu_counter_add_batch(&mp->m_delalloc_blks, delta, | |
1403 | XFS_DELALLOC_BATCH); | |
1404 | } |