Commit | Line | Data |
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1da177e4 | 1 | /* |
7b718769 NS |
2 | * Copyright (c) 2000-2005 Silicon Graphics, Inc. |
3 | * All Rights Reserved. | |
1da177e4 | 4 | * |
7b718769 NS |
5 | * This program is free software; you can redistribute it and/or |
6 | * modify it under the terms of the GNU General Public License as | |
1da177e4 LT |
7 | * published by the Free Software Foundation. |
8 | * | |
7b718769 NS |
9 | * This program is distributed in the hope that it would be useful, |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
1da177e4 | 13 | * |
7b718769 NS |
14 | * You should have received a copy of the GNU General Public License |
15 | * along with this program; if not, write the Free Software Foundation, | |
16 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
1da177e4 | 17 | */ |
1da177e4 | 18 | #include "xfs.h" |
a844f451 | 19 | #include "xfs_fs.h" |
70a9883c | 20 | #include "xfs_shared.h" |
239880ef DC |
21 | #include "xfs_format.h" |
22 | #include "xfs_log_format.h" | |
23 | #include "xfs_trans_resv.h" | |
a844f451 | 24 | #include "xfs_bit.h" |
1da177e4 | 25 | #include "xfs_sb.h" |
1da177e4 | 26 | #include "xfs_mount.h" |
57062787 | 27 | #include "xfs_da_format.h" |
9a2cc41c | 28 | #include "xfs_da_btree.h" |
1da177e4 | 29 | #include "xfs_inode.h" |
a4fbe6ab | 30 | #include "xfs_dir2.h" |
a844f451 | 31 | #include "xfs_ialloc.h" |
1da177e4 LT |
32 | #include "xfs_alloc.h" |
33 | #include "xfs_rtalloc.h" | |
34 | #include "xfs_bmap.h" | |
a4fbe6ab DC |
35 | #include "xfs_trans.h" |
36 | #include "xfs_trans_priv.h" | |
37 | #include "xfs_log.h" | |
1da177e4 | 38 | #include "xfs_error.h" |
1da177e4 LT |
39 | #include "xfs_quota.h" |
40 | #include "xfs_fsops.h" | |
0b1b213f | 41 | #include "xfs_trace.h" |
6d8b79cf | 42 | #include "xfs_icache.h" |
a31b1d3d | 43 | #include "xfs_sysfs.h" |
0b1b213f | 44 | |
1da177e4 | 45 | |
27174203 CH |
46 | static DEFINE_MUTEX(xfs_uuid_table_mutex); |
47 | static int xfs_uuid_table_size; | |
48 | static uuid_t *xfs_uuid_table; | |
49 | ||
af3b6382 DW |
50 | void |
51 | xfs_uuid_table_free(void) | |
52 | { | |
53 | if (xfs_uuid_table_size == 0) | |
54 | return; | |
55 | kmem_free(xfs_uuid_table); | |
56 | xfs_uuid_table = NULL; | |
57 | xfs_uuid_table_size = 0; | |
58 | } | |
59 | ||
27174203 CH |
60 | /* |
61 | * See if the UUID is unique among mounted XFS filesystems. | |
62 | * Mount fails if UUID is nil or a FS with the same UUID is already mounted. | |
63 | */ | |
64 | STATIC int | |
65 | xfs_uuid_mount( | |
66 | struct xfs_mount *mp) | |
67 | { | |
68 | uuid_t *uuid = &mp->m_sb.sb_uuid; | |
69 | int hole, i; | |
70 | ||
71 | if (mp->m_flags & XFS_MOUNT_NOUUID) | |
72 | return 0; | |
73 | ||
74 | if (uuid_is_nil(uuid)) { | |
0b932ccc | 75 | xfs_warn(mp, "Filesystem has nil UUID - can't mount"); |
2451337d | 76 | return -EINVAL; |
27174203 CH |
77 | } |
78 | ||
79 | mutex_lock(&xfs_uuid_table_mutex); | |
80 | for (i = 0, hole = -1; i < xfs_uuid_table_size; i++) { | |
81 | if (uuid_is_nil(&xfs_uuid_table[i])) { | |
82 | hole = i; | |
83 | continue; | |
84 | } | |
85 | if (uuid_equal(uuid, &xfs_uuid_table[i])) | |
86 | goto out_duplicate; | |
87 | } | |
88 | ||
89 | if (hole < 0) { | |
90 | xfs_uuid_table = kmem_realloc(xfs_uuid_table, | |
91 | (xfs_uuid_table_size + 1) * sizeof(*xfs_uuid_table), | |
92 | xfs_uuid_table_size * sizeof(*xfs_uuid_table), | |
93 | KM_SLEEP); | |
94 | hole = xfs_uuid_table_size++; | |
95 | } | |
96 | xfs_uuid_table[hole] = *uuid; | |
97 | mutex_unlock(&xfs_uuid_table_mutex); | |
98 | ||
99 | return 0; | |
100 | ||
101 | out_duplicate: | |
102 | mutex_unlock(&xfs_uuid_table_mutex); | |
021000e5 | 103 | xfs_warn(mp, "Filesystem has duplicate UUID %pU - can't mount", uuid); |
2451337d | 104 | return -EINVAL; |
27174203 CH |
105 | } |
106 | ||
107 | STATIC void | |
108 | xfs_uuid_unmount( | |
109 | struct xfs_mount *mp) | |
110 | { | |
111 | uuid_t *uuid = &mp->m_sb.sb_uuid; | |
112 | int i; | |
113 | ||
114 | if (mp->m_flags & XFS_MOUNT_NOUUID) | |
115 | return; | |
116 | ||
117 | mutex_lock(&xfs_uuid_table_mutex); | |
118 | for (i = 0; i < xfs_uuid_table_size; i++) { | |
119 | if (uuid_is_nil(&xfs_uuid_table[i])) | |
120 | continue; | |
121 | if (!uuid_equal(uuid, &xfs_uuid_table[i])) | |
122 | continue; | |
123 | memset(&xfs_uuid_table[i], 0, sizeof(uuid_t)); | |
124 | break; | |
125 | } | |
126 | ASSERT(i < xfs_uuid_table_size); | |
127 | mutex_unlock(&xfs_uuid_table_mutex); | |
128 | } | |
129 | ||
130 | ||
e176579e DC |
131 | STATIC void |
132 | __xfs_free_perag( | |
133 | struct rcu_head *head) | |
134 | { | |
135 | struct xfs_perag *pag = container_of(head, struct xfs_perag, rcu_head); | |
136 | ||
137 | ASSERT(atomic_read(&pag->pag_ref) == 0); | |
138 | kmem_free(pag); | |
139 | } | |
140 | ||
1da177e4 | 141 | /* |
e176579e | 142 | * Free up the per-ag resources associated with the mount structure. |
1da177e4 | 143 | */ |
c962fb79 | 144 | STATIC void |
ff4f038c | 145 | xfs_free_perag( |
745f6919 | 146 | xfs_mount_t *mp) |
1da177e4 | 147 | { |
1c1c6ebc DC |
148 | xfs_agnumber_t agno; |
149 | struct xfs_perag *pag; | |
150 | ||
151 | for (agno = 0; agno < mp->m_sb.sb_agcount; agno++) { | |
152 | spin_lock(&mp->m_perag_lock); | |
153 | pag = radix_tree_delete(&mp->m_perag_tree, agno); | |
154 | spin_unlock(&mp->m_perag_lock); | |
e176579e | 155 | ASSERT(pag); |
f83282a8 | 156 | ASSERT(atomic_read(&pag->pag_ref) == 0); |
e176579e | 157 | call_rcu(&pag->rcu_head, __xfs_free_perag); |
1da177e4 | 158 | } |
1da177e4 LT |
159 | } |
160 | ||
4cc929ee NS |
161 | /* |
162 | * Check size of device based on the (data/realtime) block count. | |
163 | * Note: this check is used by the growfs code as well as mount. | |
164 | */ | |
165 | int | |
166 | xfs_sb_validate_fsb_count( | |
167 | xfs_sb_t *sbp, | |
168 | __uint64_t nblocks) | |
169 | { | |
170 | ASSERT(PAGE_SHIFT >= sbp->sb_blocklog); | |
171 | ASSERT(sbp->sb_blocklog >= BBSHIFT); | |
172 | ||
d5cf09ba | 173 | /* Limited by ULONG_MAX of page cache index */ |
09cbfeaf | 174 | if (nblocks >> (PAGE_SHIFT - sbp->sb_blocklog) > ULONG_MAX) |
2451337d | 175 | return -EFBIG; |
4cc929ee NS |
176 | return 0; |
177 | } | |
1da177e4 | 178 | |
1c1c6ebc | 179 | int |
c11e2c36 | 180 | xfs_initialize_perag( |
c11e2c36 | 181 | xfs_mount_t *mp, |
1c1c6ebc DC |
182 | xfs_agnumber_t agcount, |
183 | xfs_agnumber_t *maxagi) | |
1da177e4 | 184 | { |
2d2194f6 | 185 | xfs_agnumber_t index; |
8b26c582 | 186 | xfs_agnumber_t first_initialised = 0; |
1da177e4 | 187 | xfs_perag_t *pag; |
8b26c582 | 188 | int error = -ENOMEM; |
1da177e4 | 189 | |
1c1c6ebc DC |
190 | /* |
191 | * Walk the current per-ag tree so we don't try to initialise AGs | |
192 | * that already exist (growfs case). Allocate and insert all the | |
193 | * AGs we don't find ready for initialisation. | |
194 | */ | |
195 | for (index = 0; index < agcount; index++) { | |
196 | pag = xfs_perag_get(mp, index); | |
197 | if (pag) { | |
198 | xfs_perag_put(pag); | |
199 | continue; | |
200 | } | |
8b26c582 DC |
201 | if (!first_initialised) |
202 | first_initialised = index; | |
fb3b504a | 203 | |
1c1c6ebc DC |
204 | pag = kmem_zalloc(sizeof(*pag), KM_MAYFAIL); |
205 | if (!pag) | |
8b26c582 | 206 | goto out_unwind; |
fb3b504a CH |
207 | pag->pag_agno = index; |
208 | pag->pag_mount = mp; | |
1a427ab0 | 209 | spin_lock_init(&pag->pag_ici_lock); |
69b491c2 | 210 | mutex_init(&pag->pag_ici_reclaim_lock); |
fb3b504a | 211 | INIT_RADIX_TREE(&pag->pag_ici_root, GFP_ATOMIC); |
74f75a0c DC |
212 | spin_lock_init(&pag->pag_buf_lock); |
213 | pag->pag_buf_tree = RB_ROOT; | |
fb3b504a | 214 | |
1c1c6ebc | 215 | if (radix_tree_preload(GFP_NOFS)) |
8b26c582 | 216 | goto out_unwind; |
fb3b504a | 217 | |
1c1c6ebc DC |
218 | spin_lock(&mp->m_perag_lock); |
219 | if (radix_tree_insert(&mp->m_perag_tree, index, pag)) { | |
220 | BUG(); | |
221 | spin_unlock(&mp->m_perag_lock); | |
8b26c582 DC |
222 | radix_tree_preload_end(); |
223 | error = -EEXIST; | |
224 | goto out_unwind; | |
1c1c6ebc DC |
225 | } |
226 | spin_unlock(&mp->m_perag_lock); | |
227 | radix_tree_preload_end(); | |
228 | } | |
229 | ||
12c3f05c | 230 | index = xfs_set_inode_alloc(mp, agcount); |
fb3b504a | 231 | |
1c1c6ebc DC |
232 | if (maxagi) |
233 | *maxagi = index; | |
234 | return 0; | |
8b26c582 DC |
235 | |
236 | out_unwind: | |
237 | kmem_free(pag); | |
238 | for (; index > first_initialised; index--) { | |
239 | pag = radix_tree_delete(&mp->m_perag_tree, index); | |
240 | kmem_free(pag); | |
241 | } | |
242 | return error; | |
1da177e4 LT |
243 | } |
244 | ||
1da177e4 LT |
245 | /* |
246 | * xfs_readsb | |
247 | * | |
248 | * Does the initial read of the superblock. | |
249 | */ | |
250 | int | |
ff55068c DC |
251 | xfs_readsb( |
252 | struct xfs_mount *mp, | |
253 | int flags) | |
1da177e4 LT |
254 | { |
255 | unsigned int sector_size; | |
04a1e6c5 DC |
256 | struct xfs_buf *bp; |
257 | struct xfs_sb *sbp = &mp->m_sb; | |
1da177e4 | 258 | int error; |
af34e09d | 259 | int loud = !(flags & XFS_MFSI_QUIET); |
daba5427 | 260 | const struct xfs_buf_ops *buf_ops; |
1da177e4 LT |
261 | |
262 | ASSERT(mp->m_sb_bp == NULL); | |
263 | ASSERT(mp->m_ddev_targp != NULL); | |
264 | ||
daba5427 ES |
265 | /* |
266 | * For the initial read, we must guess at the sector | |
267 | * size based on the block device. It's enough to | |
268 | * get the sb_sectsize out of the superblock and | |
269 | * then reread with the proper length. | |
270 | * We don't verify it yet, because it may not be complete. | |
271 | */ | |
272 | sector_size = xfs_getsize_buftarg(mp->m_ddev_targp); | |
273 | buf_ops = NULL; | |
274 | ||
1da177e4 LT |
275 | /* |
276 | * Allocate a (locked) buffer to hold the superblock. | |
277 | * This will be kept around at all times to optimize | |
278 | * access to the superblock. | |
279 | */ | |
26af6552 | 280 | reread: |
ba372674 DC |
281 | error = xfs_buf_read_uncached(mp->m_ddev_targp, XFS_SB_DADDR, |
282 | BTOBB(sector_size), 0, &bp, buf_ops); | |
283 | if (error) { | |
eab4e633 | 284 | if (loud) |
e721f504 | 285 | xfs_warn(mp, "SB validate failed with error %d.", error); |
ac75a1f7 | 286 | /* bad CRC means corrupted metadata */ |
2451337d DC |
287 | if (error == -EFSBADCRC) |
288 | error = -EFSCORRUPTED; | |
ba372674 | 289 | return error; |
eab4e633 | 290 | } |
1da177e4 LT |
291 | |
292 | /* | |
293 | * Initialize the mount structure from the superblock. | |
1da177e4 | 294 | */ |
556b8883 | 295 | xfs_sb_from_disk(sbp, XFS_BUF_TO_SBP(bp)); |
556b8883 DC |
296 | |
297 | /* | |
298 | * If we haven't validated the superblock, do so now before we try | |
299 | * to check the sector size and reread the superblock appropriately. | |
300 | */ | |
301 | if (sbp->sb_magicnum != XFS_SB_MAGIC) { | |
302 | if (loud) | |
303 | xfs_warn(mp, "Invalid superblock magic number"); | |
2451337d | 304 | error = -EINVAL; |
556b8883 DC |
305 | goto release_buf; |
306 | } | |
ff55068c | 307 | |
1da177e4 LT |
308 | /* |
309 | * We must be able to do sector-sized and sector-aligned IO. | |
310 | */ | |
04a1e6c5 | 311 | if (sector_size > sbp->sb_sectsize) { |
af34e09d DC |
312 | if (loud) |
313 | xfs_warn(mp, "device supports %u byte sectors (not %u)", | |
04a1e6c5 | 314 | sector_size, sbp->sb_sectsize); |
2451337d | 315 | error = -ENOSYS; |
26af6552 | 316 | goto release_buf; |
1da177e4 LT |
317 | } |
318 | ||
daba5427 | 319 | if (buf_ops == NULL) { |
556b8883 DC |
320 | /* |
321 | * Re-read the superblock so the buffer is correctly sized, | |
322 | * and properly verified. | |
323 | */ | |
1da177e4 | 324 | xfs_buf_relse(bp); |
04a1e6c5 | 325 | sector_size = sbp->sb_sectsize; |
daba5427 | 326 | buf_ops = loud ? &xfs_sb_buf_ops : &xfs_sb_quiet_buf_ops; |
26af6552 | 327 | goto reread; |
1da177e4 LT |
328 | } |
329 | ||
5681ca40 | 330 | xfs_reinit_percpu_counters(mp); |
8d280b98 | 331 | |
04a1e6c5 DC |
332 | /* no need to be quiet anymore, so reset the buf ops */ |
333 | bp->b_ops = &xfs_sb_buf_ops; | |
334 | ||
1da177e4 | 335 | mp->m_sb_bp = bp; |
26af6552 | 336 | xfs_buf_unlock(bp); |
1da177e4 LT |
337 | return 0; |
338 | ||
26af6552 DC |
339 | release_buf: |
340 | xfs_buf_relse(bp); | |
1da177e4 LT |
341 | return error; |
342 | } | |
343 | ||
1da177e4 | 344 | /* |
0771fb45 | 345 | * Update alignment values based on mount options and sb values |
1da177e4 | 346 | */ |
0771fb45 | 347 | STATIC int |
7884bc86 | 348 | xfs_update_alignment(xfs_mount_t *mp) |
1da177e4 | 349 | { |
1da177e4 | 350 | xfs_sb_t *sbp = &(mp->m_sb); |
1da177e4 | 351 | |
4249023a | 352 | if (mp->m_dalign) { |
1da177e4 LT |
353 | /* |
354 | * If stripe unit and stripe width are not multiples | |
355 | * of the fs blocksize turn off alignment. | |
356 | */ | |
357 | if ((BBTOB(mp->m_dalign) & mp->m_blockmask) || | |
358 | (BBTOB(mp->m_swidth) & mp->m_blockmask)) { | |
39a45d84 JL |
359 | xfs_warn(mp, |
360 | "alignment check failed: sunit/swidth vs. blocksize(%d)", | |
361 | sbp->sb_blocksize); | |
2451337d | 362 | return -EINVAL; |
1da177e4 LT |
363 | } else { |
364 | /* | |
365 | * Convert the stripe unit and width to FSBs. | |
366 | */ | |
367 | mp->m_dalign = XFS_BB_TO_FSBT(mp, mp->m_dalign); | |
368 | if (mp->m_dalign && (sbp->sb_agblocks % mp->m_dalign)) { | |
53487786 | 369 | xfs_warn(mp, |
39a45d84 JL |
370 | "alignment check failed: sunit/swidth vs. agsize(%d)", |
371 | sbp->sb_agblocks); | |
2451337d | 372 | return -EINVAL; |
1da177e4 LT |
373 | } else if (mp->m_dalign) { |
374 | mp->m_swidth = XFS_BB_TO_FSBT(mp, mp->m_swidth); | |
375 | } else { | |
39a45d84 JL |
376 | xfs_warn(mp, |
377 | "alignment check failed: sunit(%d) less than bsize(%d)", | |
378 | mp->m_dalign, sbp->sb_blocksize); | |
2451337d | 379 | return -EINVAL; |
1da177e4 LT |
380 | } |
381 | } | |
382 | ||
383 | /* | |
384 | * Update superblock with new values | |
385 | * and log changes | |
386 | */ | |
62118709 | 387 | if (xfs_sb_version_hasdalign(sbp)) { |
1da177e4 LT |
388 | if (sbp->sb_unit != mp->m_dalign) { |
389 | sbp->sb_unit = mp->m_dalign; | |
61e63ecb | 390 | mp->m_update_sb = true; |
1da177e4 LT |
391 | } |
392 | if (sbp->sb_width != mp->m_swidth) { | |
393 | sbp->sb_width = mp->m_swidth; | |
61e63ecb | 394 | mp->m_update_sb = true; |
1da177e4 | 395 | } |
34d7f603 JL |
396 | } else { |
397 | xfs_warn(mp, | |
398 | "cannot change alignment: superblock does not support data alignment"); | |
2451337d | 399 | return -EINVAL; |
1da177e4 LT |
400 | } |
401 | } else if ((mp->m_flags & XFS_MOUNT_NOALIGN) != XFS_MOUNT_NOALIGN && | |
62118709 | 402 | xfs_sb_version_hasdalign(&mp->m_sb)) { |
1da177e4 LT |
403 | mp->m_dalign = sbp->sb_unit; |
404 | mp->m_swidth = sbp->sb_width; | |
405 | } | |
406 | ||
0771fb45 ES |
407 | return 0; |
408 | } | |
1da177e4 | 409 | |
0771fb45 ES |
410 | /* |
411 | * Set the maximum inode count for this filesystem | |
412 | */ | |
413 | STATIC void | |
414 | xfs_set_maxicount(xfs_mount_t *mp) | |
415 | { | |
416 | xfs_sb_t *sbp = &(mp->m_sb); | |
417 | __uint64_t icount; | |
1da177e4 | 418 | |
0771fb45 ES |
419 | if (sbp->sb_imax_pct) { |
420 | /* | |
421 | * Make sure the maximum inode count is a multiple | |
422 | * of the units we allocate inodes in. | |
1da177e4 | 423 | */ |
1da177e4 LT |
424 | icount = sbp->sb_dblocks * sbp->sb_imax_pct; |
425 | do_div(icount, 100); | |
426 | do_div(icount, mp->m_ialloc_blks); | |
427 | mp->m_maxicount = (icount * mp->m_ialloc_blks) << | |
428 | sbp->sb_inopblog; | |
0771fb45 | 429 | } else { |
1da177e4 | 430 | mp->m_maxicount = 0; |
1da177e4 | 431 | } |
0771fb45 ES |
432 | } |
433 | ||
434 | /* | |
435 | * Set the default minimum read and write sizes unless | |
436 | * already specified in a mount option. | |
437 | * We use smaller I/O sizes when the file system | |
438 | * is being used for NFS service (wsync mount option). | |
439 | */ | |
440 | STATIC void | |
441 | xfs_set_rw_sizes(xfs_mount_t *mp) | |
442 | { | |
443 | xfs_sb_t *sbp = &(mp->m_sb); | |
444 | int readio_log, writeio_log; | |
1da177e4 | 445 | |
1da177e4 LT |
446 | if (!(mp->m_flags & XFS_MOUNT_DFLT_IOSIZE)) { |
447 | if (mp->m_flags & XFS_MOUNT_WSYNC) { | |
448 | readio_log = XFS_WSYNC_READIO_LOG; | |
449 | writeio_log = XFS_WSYNC_WRITEIO_LOG; | |
450 | } else { | |
451 | readio_log = XFS_READIO_LOG_LARGE; | |
452 | writeio_log = XFS_WRITEIO_LOG_LARGE; | |
453 | } | |
454 | } else { | |
455 | readio_log = mp->m_readio_log; | |
456 | writeio_log = mp->m_writeio_log; | |
457 | } | |
458 | ||
1da177e4 LT |
459 | if (sbp->sb_blocklog > readio_log) { |
460 | mp->m_readio_log = sbp->sb_blocklog; | |
461 | } else { | |
462 | mp->m_readio_log = readio_log; | |
463 | } | |
464 | mp->m_readio_blocks = 1 << (mp->m_readio_log - sbp->sb_blocklog); | |
465 | if (sbp->sb_blocklog > writeio_log) { | |
466 | mp->m_writeio_log = sbp->sb_blocklog; | |
467 | } else { | |
468 | mp->m_writeio_log = writeio_log; | |
469 | } | |
470 | mp->m_writeio_blocks = 1 << (mp->m_writeio_log - sbp->sb_blocklog); | |
0771fb45 | 471 | } |
1da177e4 | 472 | |
055388a3 DC |
473 | /* |
474 | * precalculate the low space thresholds for dynamic speculative preallocation. | |
475 | */ | |
476 | void | |
477 | xfs_set_low_space_thresholds( | |
478 | struct xfs_mount *mp) | |
479 | { | |
480 | int i; | |
481 | ||
482 | for (i = 0; i < XFS_LOWSP_MAX; i++) { | |
483 | __uint64_t space = mp->m_sb.sb_dblocks; | |
484 | ||
485 | do_div(space, 100); | |
486 | mp->m_low_space[i] = space * (i + 1); | |
487 | } | |
488 | } | |
489 | ||
490 | ||
0771fb45 ES |
491 | /* |
492 | * Set whether we're using inode alignment. | |
493 | */ | |
494 | STATIC void | |
495 | xfs_set_inoalignment(xfs_mount_t *mp) | |
496 | { | |
62118709 | 497 | if (xfs_sb_version_hasalign(&mp->m_sb) && |
1da177e4 LT |
498 | mp->m_sb.sb_inoalignmt >= |
499 | XFS_B_TO_FSBT(mp, mp->m_inode_cluster_size)) | |
500 | mp->m_inoalign_mask = mp->m_sb.sb_inoalignmt - 1; | |
501 | else | |
502 | mp->m_inoalign_mask = 0; | |
503 | /* | |
504 | * If we are using stripe alignment, check whether | |
505 | * the stripe unit is a multiple of the inode alignment | |
506 | */ | |
507 | if (mp->m_dalign && mp->m_inoalign_mask && | |
508 | !(mp->m_dalign & mp->m_inoalign_mask)) | |
509 | mp->m_sinoalign = mp->m_dalign; | |
510 | else | |
511 | mp->m_sinoalign = 0; | |
0771fb45 ES |
512 | } |
513 | ||
514 | /* | |
0471f62e | 515 | * Check that the data (and log if separate) is an ok size. |
0771fb45 ES |
516 | */ |
517 | STATIC int | |
ba372674 DC |
518 | xfs_check_sizes( |
519 | struct xfs_mount *mp) | |
0771fb45 | 520 | { |
ba372674 | 521 | struct xfs_buf *bp; |
0771fb45 | 522 | xfs_daddr_t d; |
ba372674 | 523 | int error; |
0771fb45 | 524 | |
1da177e4 LT |
525 | d = (xfs_daddr_t)XFS_FSB_TO_BB(mp, mp->m_sb.sb_dblocks); |
526 | if (XFS_BB_TO_FSB(mp, d) != mp->m_sb.sb_dblocks) { | |
0b932ccc | 527 | xfs_warn(mp, "filesystem size mismatch detected"); |
2451337d | 528 | return -EFBIG; |
1da177e4 | 529 | } |
ba372674 | 530 | error = xfs_buf_read_uncached(mp->m_ddev_targp, |
1922c949 | 531 | d - XFS_FSS_TO_BB(mp, 1), |
ba372674 DC |
532 | XFS_FSS_TO_BB(mp, 1), 0, &bp, NULL); |
533 | if (error) { | |
0b932ccc | 534 | xfs_warn(mp, "last sector read failed"); |
ba372674 | 535 | return error; |
1da177e4 | 536 | } |
1922c949 | 537 | xfs_buf_relse(bp); |
1da177e4 | 538 | |
ba372674 DC |
539 | if (mp->m_logdev_targp == mp->m_ddev_targp) |
540 | return 0; | |
541 | ||
542 | d = (xfs_daddr_t)XFS_FSB_TO_BB(mp, mp->m_sb.sb_logblocks); | |
543 | if (XFS_BB_TO_FSB(mp, d) != mp->m_sb.sb_logblocks) { | |
544 | xfs_warn(mp, "log size mismatch detected"); | |
545 | return -EFBIG; | |
546 | } | |
547 | error = xfs_buf_read_uncached(mp->m_logdev_targp, | |
1922c949 | 548 | d - XFS_FSB_TO_BB(mp, 1), |
ba372674 DC |
549 | XFS_FSB_TO_BB(mp, 1), 0, &bp, NULL); |
550 | if (error) { | |
551 | xfs_warn(mp, "log device read failed"); | |
552 | return error; | |
0771fb45 | 553 | } |
ba372674 | 554 | xfs_buf_relse(bp); |
0771fb45 ES |
555 | return 0; |
556 | } | |
557 | ||
7d095257 CH |
558 | /* |
559 | * Clear the quotaflags in memory and in the superblock. | |
560 | */ | |
561 | int | |
562 | xfs_mount_reset_sbqflags( | |
563 | struct xfs_mount *mp) | |
564 | { | |
7d095257 CH |
565 | mp->m_qflags = 0; |
566 | ||
61e63ecb | 567 | /* It is OK to look at sb_qflags in the mount path without m_sb_lock. */ |
7d095257 CH |
568 | if (mp->m_sb.sb_qflags == 0) |
569 | return 0; | |
570 | spin_lock(&mp->m_sb_lock); | |
571 | mp->m_sb.sb_qflags = 0; | |
572 | spin_unlock(&mp->m_sb_lock); | |
573 | ||
61e63ecb | 574 | if (!xfs_fs_writable(mp, SB_FREEZE_WRITE)) |
7d095257 CH |
575 | return 0; |
576 | ||
61e63ecb | 577 | return xfs_sync_sb(mp, false); |
7d095257 CH |
578 | } |
579 | ||
d5db0f97 ES |
580 | __uint64_t |
581 | xfs_default_resblks(xfs_mount_t *mp) | |
582 | { | |
583 | __uint64_t resblks; | |
584 | ||
585 | /* | |
8babd8a2 DC |
586 | * We default to 5% or 8192 fsbs of space reserved, whichever is |
587 | * smaller. This is intended to cover concurrent allocation | |
588 | * transactions when we initially hit enospc. These each require a 4 | |
589 | * block reservation. Hence by default we cover roughly 2000 concurrent | |
590 | * allocation reservations. | |
d5db0f97 ES |
591 | */ |
592 | resblks = mp->m_sb.sb_dblocks; | |
593 | do_div(resblks, 20); | |
8babd8a2 | 594 | resblks = min_t(__uint64_t, resblks, 8192); |
d5db0f97 ES |
595 | return resblks; |
596 | } | |
597 | ||
0771fb45 | 598 | /* |
0771fb45 ES |
599 | * This function does the following on an initial mount of a file system: |
600 | * - reads the superblock from disk and init the mount struct | |
601 | * - if we're a 32-bit kernel, do a size check on the superblock | |
602 | * so we don't mount terabyte filesystems | |
603 | * - init mount struct realtime fields | |
604 | * - allocate inode hash table for fs | |
605 | * - init directory manager | |
606 | * - perform recovery and init the log manager | |
607 | */ | |
608 | int | |
609 | xfs_mountfs( | |
f0b2efad | 610 | struct xfs_mount *mp) |
0771fb45 | 611 | { |
f0b2efad BF |
612 | struct xfs_sb *sbp = &(mp->m_sb); |
613 | struct xfs_inode *rip; | |
614 | __uint64_t resblks; | |
615 | uint quotamount = 0; | |
616 | uint quotaflags = 0; | |
617 | int error = 0; | |
0771fb45 | 618 | |
ff55068c | 619 | xfs_sb_mount_common(mp, sbp); |
0771fb45 | 620 | |
ee1c0908 | 621 | /* |
074e427b DC |
622 | * Check for a mismatched features2 values. Older kernels read & wrote |
623 | * into the wrong sb offset for sb_features2 on some platforms due to | |
624 | * xfs_sb_t not being 64bit size aligned when sb_features2 was added, | |
625 | * which made older superblock reading/writing routines swap it as a | |
626 | * 64-bit value. | |
ee1c0908 | 627 | * |
e6957ea4 ES |
628 | * For backwards compatibility, we make both slots equal. |
629 | * | |
074e427b DC |
630 | * If we detect a mismatched field, we OR the set bits into the existing |
631 | * features2 field in case it has already been modified; we don't want | |
632 | * to lose any features. We then update the bad location with the ORed | |
633 | * value so that older kernels will see any features2 flags. The | |
634 | * superblock writeback code ensures the new sb_features2 is copied to | |
635 | * sb_bad_features2 before it is logged or written to disk. | |
ee1c0908 | 636 | */ |
e6957ea4 | 637 | if (xfs_sb_has_mismatched_features2(sbp)) { |
0b932ccc | 638 | xfs_warn(mp, "correcting sb_features alignment problem"); |
ee1c0908 | 639 | sbp->sb_features2 |= sbp->sb_bad_features2; |
61e63ecb | 640 | mp->m_update_sb = true; |
e6957ea4 ES |
641 | |
642 | /* | |
643 | * Re-check for ATTR2 in case it was found in bad_features2 | |
644 | * slot. | |
645 | */ | |
7c12f296 TS |
646 | if (xfs_sb_version_hasattr2(&mp->m_sb) && |
647 | !(mp->m_flags & XFS_MOUNT_NOATTR2)) | |
e6957ea4 | 648 | mp->m_flags |= XFS_MOUNT_ATTR2; |
7c12f296 TS |
649 | } |
650 | ||
651 | if (xfs_sb_version_hasattr2(&mp->m_sb) && | |
652 | (mp->m_flags & XFS_MOUNT_NOATTR2)) { | |
653 | xfs_sb_version_removeattr2(&mp->m_sb); | |
61e63ecb | 654 | mp->m_update_sb = true; |
e6957ea4 | 655 | |
7c12f296 TS |
656 | /* update sb_versionnum for the clearing of the morebits */ |
657 | if (!sbp->sb_features2) | |
61e63ecb | 658 | mp->m_update_sb = true; |
ee1c0908 DC |
659 | } |
660 | ||
263997a6 DC |
661 | /* always use v2 inodes by default now */ |
662 | if (!(mp->m_sb.sb_versionnum & XFS_SB_VERSION_NLINKBIT)) { | |
663 | mp->m_sb.sb_versionnum |= XFS_SB_VERSION_NLINKBIT; | |
61e63ecb | 664 | mp->m_update_sb = true; |
263997a6 DC |
665 | } |
666 | ||
0771fb45 ES |
667 | /* |
668 | * Check if sb_agblocks is aligned at stripe boundary | |
669 | * If sb_agblocks is NOT aligned turn off m_dalign since | |
670 | * allocator alignment is within an ag, therefore ag has | |
671 | * to be aligned at stripe boundary. | |
672 | */ | |
7884bc86 | 673 | error = xfs_update_alignment(mp); |
0771fb45 | 674 | if (error) |
f9057e3d | 675 | goto out; |
0771fb45 ES |
676 | |
677 | xfs_alloc_compute_maxlevels(mp); | |
678 | xfs_bmap_compute_maxlevels(mp, XFS_DATA_FORK); | |
679 | xfs_bmap_compute_maxlevels(mp, XFS_ATTR_FORK); | |
680 | xfs_ialloc_compute_maxlevels(mp); | |
681 | ||
682 | xfs_set_maxicount(mp); | |
683 | ||
a31b1d3d | 684 | error = xfs_sysfs_init(&mp->m_kobj, &xfs_mp_ktype, NULL, mp->m_fsname); |
27174203 CH |
685 | if (error) |
686 | goto out; | |
1da177e4 | 687 | |
225e4635 BD |
688 | error = xfs_sysfs_init(&mp->m_stats.xs_kobj, &xfs_stats_ktype, |
689 | &mp->m_kobj, "stats"); | |
a31b1d3d BF |
690 | if (error) |
691 | goto out_remove_sysfs; | |
692 | ||
225e4635 BD |
693 | error = xfs_uuid_mount(mp); |
694 | if (error) | |
695 | goto out_del_stats; | |
696 | ||
0771fb45 ES |
697 | /* |
698 | * Set the minimum read and write sizes | |
699 | */ | |
700 | xfs_set_rw_sizes(mp); | |
701 | ||
055388a3 DC |
702 | /* set the low space thresholds for dynamic preallocation */ |
703 | xfs_set_low_space_thresholds(mp); | |
704 | ||
0771fb45 ES |
705 | /* |
706 | * Set the inode cluster size. | |
707 | * This may still be overridden by the file system | |
708 | * block size if it is larger than the chosen cluster size. | |
8f80587b DC |
709 | * |
710 | * For v5 filesystems, scale the cluster size with the inode size to | |
711 | * keep a constant ratio of inode per cluster buffer, but only if mkfs | |
712 | * has set the inode alignment value appropriately for larger cluster | |
713 | * sizes. | |
0771fb45 ES |
714 | */ |
715 | mp->m_inode_cluster_size = XFS_INODE_BIG_CLUSTER_SIZE; | |
8f80587b DC |
716 | if (xfs_sb_version_hascrc(&mp->m_sb)) { |
717 | int new_size = mp->m_inode_cluster_size; | |
718 | ||
719 | new_size *= mp->m_sb.sb_inodesize / XFS_DINODE_MIN_SIZE; | |
720 | if (mp->m_sb.sb_inoalignmt >= XFS_B_TO_FSBT(mp, new_size)) | |
721 | mp->m_inode_cluster_size = new_size; | |
8f80587b | 722 | } |
0771fb45 | 723 | |
e5376fc1 BF |
724 | /* |
725 | * If enabled, sparse inode chunk alignment is expected to match the | |
726 | * cluster size. Full inode chunk alignment must match the chunk size, | |
727 | * but that is checked on sb read verification... | |
728 | */ | |
729 | if (xfs_sb_version_hassparseinodes(&mp->m_sb) && | |
730 | mp->m_sb.sb_spino_align != | |
731 | XFS_B_TO_FSBT(mp, mp->m_inode_cluster_size)) { | |
732 | xfs_warn(mp, | |
733 | "Sparse inode block alignment (%u) must match cluster size (%llu).", | |
734 | mp->m_sb.sb_spino_align, | |
735 | XFS_B_TO_FSBT(mp, mp->m_inode_cluster_size)); | |
736 | error = -EINVAL; | |
737 | goto out_remove_uuid; | |
738 | } | |
739 | ||
0771fb45 ES |
740 | /* |
741 | * Set inode alignment fields | |
742 | */ | |
743 | xfs_set_inoalignment(mp); | |
744 | ||
745 | /* | |
c2bfbc9b | 746 | * Check that the data (and log if separate) is an ok size. |
0771fb45 | 747 | */ |
4249023a | 748 | error = xfs_check_sizes(mp); |
0771fb45 | 749 | if (error) |
f9057e3d | 750 | goto out_remove_uuid; |
0771fb45 | 751 | |
1da177e4 LT |
752 | /* |
753 | * Initialize realtime fields in the mount structure | |
754 | */ | |
0771fb45 ES |
755 | error = xfs_rtmount_init(mp); |
756 | if (error) { | |
0b932ccc | 757 | xfs_warn(mp, "RT mount failed"); |
f9057e3d | 758 | goto out_remove_uuid; |
1da177e4 LT |
759 | } |
760 | ||
1da177e4 LT |
761 | /* |
762 | * Copies the low order bits of the timestamp and the randomly | |
763 | * set "sequence" number out of a UUID. | |
764 | */ | |
765 | uuid_getnodeuniq(&sbp->sb_uuid, mp->m_fixedfsid); | |
766 | ||
1da177e4 LT |
767 | mp->m_dmevmask = 0; /* not persistent; set after each mount */ |
768 | ||
0650b554 DC |
769 | error = xfs_da_mount(mp); |
770 | if (error) { | |
771 | xfs_warn(mp, "Failed dir/attr init: %d", error); | |
772 | goto out_remove_uuid; | |
773 | } | |
1da177e4 LT |
774 | |
775 | /* | |
776 | * Initialize the precomputed transaction reservations values. | |
777 | */ | |
778 | xfs_trans_init(mp); | |
779 | ||
1da177e4 LT |
780 | /* |
781 | * Allocate and initialize the per-ag data. | |
782 | */ | |
1c1c6ebc | 783 | spin_lock_init(&mp->m_perag_lock); |
9b98b6f3 | 784 | INIT_RADIX_TREE(&mp->m_perag_tree, GFP_ATOMIC); |
1c1c6ebc DC |
785 | error = xfs_initialize_perag(mp, sbp->sb_agcount, &mp->m_maxagi); |
786 | if (error) { | |
0b932ccc | 787 | xfs_warn(mp, "Failed per-ag init: %d", error); |
0650b554 | 788 | goto out_free_dir; |
1c1c6ebc | 789 | } |
1da177e4 | 790 | |
f9057e3d | 791 | if (!sbp->sb_logblocks) { |
0b932ccc | 792 | xfs_warn(mp, "no log defined"); |
f9057e3d | 793 | XFS_ERROR_REPORT("xfs_mountfs", XFS_ERRLEVEL_LOW, mp); |
2451337d | 794 | error = -EFSCORRUPTED; |
f9057e3d CH |
795 | goto out_free_perag; |
796 | } | |
797 | ||
1da177e4 | 798 | /* |
f0b2efad BF |
799 | * Log's mount-time initialization. The first part of recovery can place |
800 | * some items on the AIL, to be handled when recovery is finished or | |
801 | * cancelled. | |
1da177e4 | 802 | */ |
f9057e3d CH |
803 | error = xfs_log_mount(mp, mp->m_logdev_targp, |
804 | XFS_FSB_TO_DADDR(mp, sbp->sb_logstart), | |
805 | XFS_FSB_TO_BB(mp, sbp->sb_logblocks)); | |
806 | if (error) { | |
0b932ccc | 807 | xfs_warn(mp, "log mount failed"); |
d4f3512b | 808 | goto out_fail_wait; |
1da177e4 LT |
809 | } |
810 | ||
92821e2b DC |
811 | /* |
812 | * Now the log is mounted, we know if it was an unclean shutdown or | |
813 | * not. If it was, with the first phase of recovery has completed, we | |
814 | * have consistent AG blocks on disk. We have not recovered EFIs yet, | |
815 | * but they are recovered transactionally in the second recovery phase | |
816 | * later. | |
817 | * | |
818 | * Hence we can safely re-initialise incore superblock counters from | |
819 | * the per-ag data. These may not be correct if the filesystem was not | |
820 | * cleanly unmounted, so we need to wait for recovery to finish before | |
821 | * doing this. | |
822 | * | |
823 | * If the filesystem was cleanly unmounted, then we can trust the | |
824 | * values in the superblock to be correct and we don't need to do | |
825 | * anything here. | |
826 | * | |
827 | * If we are currently making the filesystem, the initialisation will | |
828 | * fail as the perag data is in an undefined state. | |
829 | */ | |
92821e2b DC |
830 | if (xfs_sb_version_haslazysbcount(&mp->m_sb) && |
831 | !XFS_LAST_UNMOUNT_WAS_CLEAN(mp) && | |
832 | !mp->m_sb.sb_inprogress) { | |
833 | error = xfs_initialize_perag_data(mp, sbp->sb_agcount); | |
f9057e3d | 834 | if (error) |
6eee8972 | 835 | goto out_log_dealloc; |
92821e2b | 836 | } |
f9057e3d | 837 | |
1da177e4 LT |
838 | /* |
839 | * Get and sanity-check the root inode. | |
840 | * Save the pointer to it in the mount structure. | |
841 | */ | |
7b6259e7 | 842 | error = xfs_iget(mp, NULL, sbp->sb_rootino, 0, XFS_ILOCK_EXCL, &rip); |
1da177e4 | 843 | if (error) { |
0b932ccc | 844 | xfs_warn(mp, "failed to read root inode"); |
f9057e3d | 845 | goto out_log_dealloc; |
1da177e4 LT |
846 | } |
847 | ||
848 | ASSERT(rip != NULL); | |
1da177e4 | 849 | |
c19b3b05 | 850 | if (unlikely(!S_ISDIR(VFS_I(rip)->i_mode))) { |
0b932ccc | 851 | xfs_warn(mp, "corrupted root inode %llu: not a directory", |
b6574520 | 852 | (unsigned long long)rip->i_ino); |
1da177e4 LT |
853 | xfs_iunlock(rip, XFS_ILOCK_EXCL); |
854 | XFS_ERROR_REPORT("xfs_mountfs_int(2)", XFS_ERRLEVEL_LOW, | |
855 | mp); | |
2451337d | 856 | error = -EFSCORRUPTED; |
f9057e3d | 857 | goto out_rele_rip; |
1da177e4 LT |
858 | } |
859 | mp->m_rootip = rip; /* save it */ | |
860 | ||
861 | xfs_iunlock(rip, XFS_ILOCK_EXCL); | |
862 | ||
863 | /* | |
864 | * Initialize realtime inode pointers in the mount structure | |
865 | */ | |
0771fb45 ES |
866 | error = xfs_rtmount_inodes(mp); |
867 | if (error) { | |
1da177e4 LT |
868 | /* |
869 | * Free up the root inode. | |
870 | */ | |
0b932ccc | 871 | xfs_warn(mp, "failed to read RT inodes"); |
f9057e3d | 872 | goto out_rele_rip; |
1da177e4 LT |
873 | } |
874 | ||
875 | /* | |
7884bc86 CH |
876 | * If this is a read-only mount defer the superblock updates until |
877 | * the next remount into writeable mode. Otherwise we would never | |
878 | * perform the update e.g. for the root filesystem. | |
1da177e4 | 879 | */ |
61e63ecb DC |
880 | if (mp->m_update_sb && !(mp->m_flags & XFS_MOUNT_RDONLY)) { |
881 | error = xfs_sync_sb(mp, false); | |
e5720eec | 882 | if (error) { |
0b932ccc | 883 | xfs_warn(mp, "failed to write sb changes"); |
b93b6e43 | 884 | goto out_rtunmount; |
e5720eec DC |
885 | } |
886 | } | |
1da177e4 LT |
887 | |
888 | /* | |
889 | * Initialise the XFS quota management subsystem for this mount | |
890 | */ | |
7d095257 CH |
891 | if (XFS_IS_QUOTA_RUNNING(mp)) { |
892 | error = xfs_qm_newmount(mp, "amount, "aflags); | |
893 | if (error) | |
894 | goto out_rtunmount; | |
895 | } else { | |
896 | ASSERT(!XFS_IS_QUOTA_ON(mp)); | |
897 | ||
898 | /* | |
899 | * If a file system had quotas running earlier, but decided to | |
900 | * mount without -o uquota/pquota/gquota options, revoke the | |
901 | * quotachecked license. | |
902 | */ | |
903 | if (mp->m_sb.sb_qflags & XFS_ALL_QUOTA_ACCT) { | |
0b932ccc | 904 | xfs_notice(mp, "resetting quota flags"); |
7d095257 CH |
905 | error = xfs_mount_reset_sbqflags(mp); |
906 | if (error) | |
a70a4fa5 | 907 | goto out_rtunmount; |
7d095257 CH |
908 | } |
909 | } | |
1da177e4 LT |
910 | |
911 | /* | |
f0b2efad BF |
912 | * Finish recovering the file system. This part needed to be delayed |
913 | * until after the root and real-time bitmap inodes were consistently | |
914 | * read in. | |
1da177e4 | 915 | */ |
4249023a | 916 | error = xfs_log_mount_finish(mp); |
1da177e4 | 917 | if (error) { |
0b932ccc | 918 | xfs_warn(mp, "log mount finish failed"); |
b93b6e43 | 919 | goto out_rtunmount; |
1da177e4 LT |
920 | } |
921 | ||
922 | /* | |
923 | * Complete the quota initialisation, post-log-replay component. | |
924 | */ | |
7d095257 CH |
925 | if (quotamount) { |
926 | ASSERT(mp->m_qflags == 0); | |
927 | mp->m_qflags = quotaflags; | |
928 | ||
929 | xfs_qm_mount_quotas(mp); | |
930 | } | |
931 | ||
84e1e99f DC |
932 | /* |
933 | * Now we are mounted, reserve a small amount of unused space for | |
934 | * privileged transactions. This is needed so that transaction | |
935 | * space required for critical operations can dip into this pool | |
936 | * when at ENOSPC. This is needed for operations like create with | |
937 | * attr, unwritten extent conversion at ENOSPC, etc. Data allocations | |
938 | * are not allowed to use this reserved space. | |
8babd8a2 DC |
939 | * |
940 | * This may drive us straight to ENOSPC on mount, but that implies | |
941 | * we were already there on the last unmount. Warn if this occurs. | |
84e1e99f | 942 | */ |
d5db0f97 ES |
943 | if (!(mp->m_flags & XFS_MOUNT_RDONLY)) { |
944 | resblks = xfs_default_resblks(mp); | |
945 | error = xfs_reserve_blocks(mp, &resblks, NULL); | |
946 | if (error) | |
0b932ccc DC |
947 | xfs_warn(mp, |
948 | "Unable to allocate reserve blocks. Continuing without reserve pool."); | |
d5db0f97 | 949 | } |
84e1e99f | 950 | |
1da177e4 LT |
951 | return 0; |
952 | ||
b93b6e43 CH |
953 | out_rtunmount: |
954 | xfs_rtunmount_inodes(mp); | |
f9057e3d | 955 | out_rele_rip: |
43355099 | 956 | IRELE(rip); |
0ae120f8 BF |
957 | cancel_delayed_work_sync(&mp->m_reclaim_work); |
958 | xfs_reclaim_inodes(mp, SYNC_WAIT); | |
f9057e3d | 959 | out_log_dealloc: |
f0b2efad | 960 | xfs_log_mount_cancel(mp); |
d4f3512b DC |
961 | out_fail_wait: |
962 | if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp) | |
963 | xfs_wait_buftarg(mp->m_logdev_targp); | |
964 | xfs_wait_buftarg(mp->m_ddev_targp); | |
f9057e3d | 965 | out_free_perag: |
ff4f038c | 966 | xfs_free_perag(mp); |
0650b554 DC |
967 | out_free_dir: |
968 | xfs_da_unmount(mp); | |
f9057e3d | 969 | out_remove_uuid: |
27174203 | 970 | xfs_uuid_unmount(mp); |
225e4635 BD |
971 | out_del_stats: |
972 | xfs_sysfs_del(&mp->m_stats.xs_kobj); | |
a31b1d3d BF |
973 | out_remove_sysfs: |
974 | xfs_sysfs_del(&mp->m_kobj); | |
f9057e3d | 975 | out: |
1da177e4 LT |
976 | return error; |
977 | } | |
978 | ||
979 | /* | |
1da177e4 LT |
980 | * This flushes out the inodes,dquots and the superblock, unmounts the |
981 | * log and makes sure that incore structures are freed. | |
982 | */ | |
41b5c2e7 CH |
983 | void |
984 | xfs_unmountfs( | |
985 | struct xfs_mount *mp) | |
1da177e4 | 986 | { |
41b5c2e7 CH |
987 | __uint64_t resblks; |
988 | int error; | |
1da177e4 | 989 | |
579b62fa BF |
990 | cancel_delayed_work_sync(&mp->m_eofblocks_work); |
991 | ||
7d095257 | 992 | xfs_qm_unmount_quotas(mp); |
b93b6e43 | 993 | xfs_rtunmount_inodes(mp); |
77508ec8 CH |
994 | IRELE(mp->m_rootip); |
995 | ||
641c56fb DC |
996 | /* |
997 | * We can potentially deadlock here if we have an inode cluster | |
9da096fd | 998 | * that has been freed has its buffer still pinned in memory because |
641c56fb DC |
999 | * the transaction is still sitting in a iclog. The stale inodes |
1000 | * on that buffer will have their flush locks held until the | |
1001 | * transaction hits the disk and the callbacks run. the inode | |
1002 | * flush takes the flush lock unconditionally and with nothing to | |
1003 | * push out the iclog we will never get that unlocked. hence we | |
1004 | * need to force the log first. | |
1005 | */ | |
a14a348b | 1006 | xfs_log_force(mp, XFS_LOG_SYNC); |
c854363e DC |
1007 | |
1008 | /* | |
211e4d43 CH |
1009 | * Flush all pending changes from the AIL. |
1010 | */ | |
1011 | xfs_ail_push_all_sync(mp->m_ail); | |
1012 | ||
1013 | /* | |
1014 | * And reclaim all inodes. At this point there should be no dirty | |
7e18530b DC |
1015 | * inodes and none should be pinned or locked, but use synchronous |
1016 | * reclaim just to be sure. We can stop background inode reclaim | |
1017 | * here as well if it is still running. | |
c854363e | 1018 | */ |
7e18530b | 1019 | cancel_delayed_work_sync(&mp->m_reclaim_work); |
c854363e | 1020 | xfs_reclaim_inodes(mp, SYNC_WAIT); |
1da177e4 | 1021 | |
7d095257 | 1022 | xfs_qm_unmount(mp); |
a357a121 | 1023 | |
84e1e99f DC |
1024 | /* |
1025 | * Unreserve any blocks we have so that when we unmount we don't account | |
1026 | * the reserved free space as used. This is really only necessary for | |
1027 | * lazy superblock counting because it trusts the incore superblock | |
9da096fd | 1028 | * counters to be absolutely correct on clean unmount. |
84e1e99f DC |
1029 | * |
1030 | * We don't bother correcting this elsewhere for lazy superblock | |
1031 | * counting because on mount of an unclean filesystem we reconstruct the | |
1032 | * correct counter value and this is irrelevant. | |
1033 | * | |
1034 | * For non-lazy counter filesystems, this doesn't matter at all because | |
1035 | * we only every apply deltas to the superblock and hence the incore | |
1036 | * value does not matter.... | |
1037 | */ | |
1038 | resblks = 0; | |
714082bc DC |
1039 | error = xfs_reserve_blocks(mp, &resblks, NULL); |
1040 | if (error) | |
0b932ccc | 1041 | xfs_warn(mp, "Unable to free reserved block pool. " |
714082bc DC |
1042 | "Freespace may not be correct on next mount."); |
1043 | ||
adab0f67 | 1044 | error = xfs_log_sbcount(mp); |
e5720eec | 1045 | if (error) |
0b932ccc | 1046 | xfs_warn(mp, "Unable to update superblock counters. " |
e5720eec | 1047 | "Freespace may not be correct on next mount."); |
87c7bec7 | 1048 | |
225e4635 | 1049 | |
21b699c8 | 1050 | xfs_log_unmount(mp); |
0650b554 | 1051 | xfs_da_unmount(mp); |
27174203 | 1052 | xfs_uuid_unmount(mp); |
1da177e4 | 1053 | |
1550d0b0 | 1054 | #if defined(DEBUG) |
0ce4cfd4 | 1055 | xfs_errortag_clearall(mp, 0); |
1da177e4 | 1056 | #endif |
ff4f038c | 1057 | xfs_free_perag(mp); |
a31b1d3d | 1058 | |
225e4635 | 1059 | xfs_sysfs_del(&mp->m_stats.xs_kobj); |
a31b1d3d | 1060 | xfs_sysfs_del(&mp->m_kobj); |
1da177e4 LT |
1061 | } |
1062 | ||
91ee575f BF |
1063 | /* |
1064 | * Determine whether modifications can proceed. The caller specifies the minimum | |
1065 | * freeze level for which modifications should not be allowed. This allows | |
1066 | * certain operations to proceed while the freeze sequence is in progress, if | |
1067 | * necessary. | |
1068 | */ | |
1069 | bool | |
1070 | xfs_fs_writable( | |
1071 | struct xfs_mount *mp, | |
1072 | int level) | |
92821e2b | 1073 | { |
91ee575f BF |
1074 | ASSERT(level > SB_UNFROZEN); |
1075 | if ((mp->m_super->s_writers.frozen >= level) || | |
1076 | XFS_FORCED_SHUTDOWN(mp) || (mp->m_flags & XFS_MOUNT_RDONLY)) | |
1077 | return false; | |
1078 | ||
1079 | return true; | |
92821e2b DC |
1080 | } |
1081 | ||
1082 | /* | |
b2ce3974 AE |
1083 | * xfs_log_sbcount |
1084 | * | |
adab0f67 | 1085 | * Sync the superblock counters to disk. |
b2ce3974 | 1086 | * |
91ee575f BF |
1087 | * Note this code can be called during the process of freezing, so we use the |
1088 | * transaction allocator that does not block when the transaction subsystem is | |
1089 | * in its frozen state. | |
92821e2b DC |
1090 | */ |
1091 | int | |
adab0f67 | 1092 | xfs_log_sbcount(xfs_mount_t *mp) |
92821e2b | 1093 | { |
91ee575f BF |
1094 | /* allow this to proceed during the freeze sequence... */ |
1095 | if (!xfs_fs_writable(mp, SB_FREEZE_COMPLETE)) | |
92821e2b DC |
1096 | return 0; |
1097 | ||
92821e2b DC |
1098 | /* |
1099 | * we don't need to do this if we are updating the superblock | |
1100 | * counters on every modification. | |
1101 | */ | |
1102 | if (!xfs_sb_version_haslazysbcount(&mp->m_sb)) | |
1103 | return 0; | |
1104 | ||
61e63ecb | 1105 | return xfs_sync_sb(mp, true); |
92821e2b DC |
1106 | } |
1107 | ||
8c1903d3 DC |
1108 | /* |
1109 | * Deltas for the inode count are +/-64, hence we use a large batch size | |
1110 | * of 128 so we don't need to take the counter lock on every update. | |
1111 | */ | |
1112 | #define XFS_ICOUNT_BATCH 128 | |
501ab323 DC |
1113 | int |
1114 | xfs_mod_icount( | |
1115 | struct xfs_mount *mp, | |
1116 | int64_t delta) | |
1117 | { | |
8c1903d3 DC |
1118 | __percpu_counter_add(&mp->m_icount, delta, XFS_ICOUNT_BATCH); |
1119 | if (__percpu_counter_compare(&mp->m_icount, 0, XFS_ICOUNT_BATCH) < 0) { | |
501ab323 DC |
1120 | ASSERT(0); |
1121 | percpu_counter_add(&mp->m_icount, -delta); | |
1122 | return -EINVAL; | |
1123 | } | |
1124 | return 0; | |
1125 | } | |
1126 | ||
e88b64ea DC |
1127 | int |
1128 | xfs_mod_ifree( | |
1129 | struct xfs_mount *mp, | |
1130 | int64_t delta) | |
1131 | { | |
1132 | percpu_counter_add(&mp->m_ifree, delta); | |
1133 | if (percpu_counter_compare(&mp->m_ifree, 0) < 0) { | |
1134 | ASSERT(0); | |
1135 | percpu_counter_add(&mp->m_ifree, -delta); | |
1136 | return -EINVAL; | |
1137 | } | |
1138 | return 0; | |
1139 | } | |
0d485ada | 1140 | |
8c1903d3 DC |
1141 | /* |
1142 | * Deltas for the block count can vary from 1 to very large, but lock contention | |
1143 | * only occurs on frequent small block count updates such as in the delayed | |
1144 | * allocation path for buffered writes (page a time updates). Hence we set | |
1145 | * a large batch count (1024) to minimise global counter updates except when | |
1146 | * we get near to ENOSPC and we have to be very accurate with our updates. | |
1147 | */ | |
1148 | #define XFS_FDBLOCKS_BATCH 1024 | |
0d485ada DC |
1149 | int |
1150 | xfs_mod_fdblocks( | |
1151 | struct xfs_mount *mp, | |
1152 | int64_t delta, | |
1153 | bool rsvd) | |
1154 | { | |
1155 | int64_t lcounter; | |
1156 | long long res_used; | |
1157 | s32 batch; | |
1158 | ||
1159 | if (delta > 0) { | |
1160 | /* | |
1161 | * If the reserve pool is depleted, put blocks back into it | |
1162 | * first. Most of the time the pool is full. | |
1163 | */ | |
1164 | if (likely(mp->m_resblks == mp->m_resblks_avail)) { | |
1165 | percpu_counter_add(&mp->m_fdblocks, delta); | |
1166 | return 0; | |
1167 | } | |
1168 | ||
1169 | spin_lock(&mp->m_sb_lock); | |
1170 | res_used = (long long)(mp->m_resblks - mp->m_resblks_avail); | |
1171 | ||
1172 | if (res_used > delta) { | |
1173 | mp->m_resblks_avail += delta; | |
1174 | } else { | |
1175 | delta -= res_used; | |
1176 | mp->m_resblks_avail = mp->m_resblks; | |
1177 | percpu_counter_add(&mp->m_fdblocks, delta); | |
1178 | } | |
1179 | spin_unlock(&mp->m_sb_lock); | |
1180 | return 0; | |
1181 | } | |
1182 | ||
1183 | /* | |
1184 | * Taking blocks away, need to be more accurate the closer we | |
1185 | * are to zero. | |
1186 | * | |
0d485ada DC |
1187 | * If the counter has a value of less than 2 * max batch size, |
1188 | * then make everything serialise as we are real close to | |
1189 | * ENOSPC. | |
1190 | */ | |
8c1903d3 DC |
1191 | if (__percpu_counter_compare(&mp->m_fdblocks, 2 * XFS_FDBLOCKS_BATCH, |
1192 | XFS_FDBLOCKS_BATCH) < 0) | |
0d485ada DC |
1193 | batch = 1; |
1194 | else | |
8c1903d3 | 1195 | batch = XFS_FDBLOCKS_BATCH; |
0d485ada DC |
1196 | |
1197 | __percpu_counter_add(&mp->m_fdblocks, delta, batch); | |
8c1903d3 DC |
1198 | if (__percpu_counter_compare(&mp->m_fdblocks, XFS_ALLOC_SET_ASIDE(mp), |
1199 | XFS_FDBLOCKS_BATCH) >= 0) { | |
0d485ada DC |
1200 | /* we had space! */ |
1201 | return 0; | |
1202 | } | |
1203 | ||
1204 | /* | |
1205 | * lock up the sb for dipping into reserves before releasing the space | |
1206 | * that took us to ENOSPC. | |
1207 | */ | |
1208 | spin_lock(&mp->m_sb_lock); | |
1209 | percpu_counter_add(&mp->m_fdblocks, -delta); | |
1210 | if (!rsvd) | |
1211 | goto fdblocks_enospc; | |
1212 | ||
1213 | lcounter = (long long)mp->m_resblks_avail + delta; | |
1214 | if (lcounter >= 0) { | |
1215 | mp->m_resblks_avail = lcounter; | |
1216 | spin_unlock(&mp->m_sb_lock); | |
1217 | return 0; | |
1218 | } | |
1219 | printk_once(KERN_WARNING | |
1220 | "Filesystem \"%s\": reserve blocks depleted! " | |
1221 | "Consider increasing reserve pool size.", | |
1222 | mp->m_fsname); | |
1223 | fdblocks_enospc: | |
1224 | spin_unlock(&mp->m_sb_lock); | |
1225 | return -ENOSPC; | |
1226 | } | |
1227 | ||
bab98bbe DC |
1228 | int |
1229 | xfs_mod_frextents( | |
1230 | struct xfs_mount *mp, | |
1231 | int64_t delta) | |
1232 | { | |
1233 | int64_t lcounter; | |
1234 | int ret = 0; | |
1235 | ||
1236 | spin_lock(&mp->m_sb_lock); | |
1237 | lcounter = mp->m_sb.sb_frextents + delta; | |
1238 | if (lcounter < 0) | |
1239 | ret = -ENOSPC; | |
1240 | else | |
1241 | mp->m_sb.sb_frextents = lcounter; | |
1242 | spin_unlock(&mp->m_sb_lock); | |
1243 | return ret; | |
1244 | } | |
1245 | ||
1da177e4 LT |
1246 | /* |
1247 | * xfs_getsb() is called to obtain the buffer for the superblock. | |
1248 | * The buffer is returned locked and read in from disk. | |
1249 | * The buffer should be released with a call to xfs_brelse(). | |
1250 | * | |
1251 | * If the flags parameter is BUF_TRYLOCK, then we'll only return | |
1252 | * the superblock buffer if it can be locked without sleeping. | |
1253 | * If it can't then we'll return NULL. | |
1254 | */ | |
0c842ad4 | 1255 | struct xfs_buf * |
1da177e4 | 1256 | xfs_getsb( |
0c842ad4 CH |
1257 | struct xfs_mount *mp, |
1258 | int flags) | |
1da177e4 | 1259 | { |
0c842ad4 | 1260 | struct xfs_buf *bp = mp->m_sb_bp; |
1da177e4 | 1261 | |
0c842ad4 CH |
1262 | if (!xfs_buf_trylock(bp)) { |
1263 | if (flags & XBF_TRYLOCK) | |
1da177e4 | 1264 | return NULL; |
0c842ad4 | 1265 | xfs_buf_lock(bp); |
1da177e4 | 1266 | } |
0c842ad4 | 1267 | |
72790aa1 | 1268 | xfs_buf_hold(bp); |
b0388bf1 | 1269 | ASSERT(bp->b_flags & XBF_DONE); |
014c2544 | 1270 | return bp; |
1da177e4 LT |
1271 | } |
1272 | ||
1273 | /* | |
1274 | * Used to free the superblock along various error paths. | |
1275 | */ | |
1276 | void | |
1277 | xfs_freesb( | |
26af6552 | 1278 | struct xfs_mount *mp) |
1da177e4 | 1279 | { |
26af6552 | 1280 | struct xfs_buf *bp = mp->m_sb_bp; |
1da177e4 | 1281 | |
26af6552 | 1282 | xfs_buf_lock(bp); |
1da177e4 | 1283 | mp->m_sb_bp = NULL; |
26af6552 | 1284 | xfs_buf_relse(bp); |
1da177e4 LT |
1285 | } |
1286 | ||
dda35b8f CH |
1287 | /* |
1288 | * If the underlying (data/log/rt) device is readonly, there are some | |
1289 | * operations that cannot proceed. | |
1290 | */ | |
1291 | int | |
1292 | xfs_dev_is_read_only( | |
1293 | struct xfs_mount *mp, | |
1294 | char *message) | |
1295 | { | |
1296 | if (xfs_readonly_buftarg(mp->m_ddev_targp) || | |
1297 | xfs_readonly_buftarg(mp->m_logdev_targp) || | |
1298 | (mp->m_rtdev_targp && xfs_readonly_buftarg(mp->m_rtdev_targp))) { | |
0b932ccc DC |
1299 | xfs_notice(mp, "%s required on read-only device.", message); |
1300 | xfs_notice(mp, "write access unavailable, cannot proceed."); | |
2451337d | 1301 | return -EROFS; |
dda35b8f CH |
1302 | } |
1303 | return 0; | |
1304 | } |