]>
Commit | Line | Data |
---|---|---|
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" |
3ab78df2 | 27 | #include "xfs_defer.h" |
57062787 | 28 | #include "xfs_da_format.h" |
9a2cc41c | 29 | #include "xfs_da_btree.h" |
1da177e4 | 30 | #include "xfs_inode.h" |
a4fbe6ab | 31 | #include "xfs_dir2.h" |
a844f451 | 32 | #include "xfs_ialloc.h" |
1da177e4 LT |
33 | #include "xfs_alloc.h" |
34 | #include "xfs_rtalloc.h" | |
35 | #include "xfs_bmap.h" | |
a4fbe6ab DC |
36 | #include "xfs_trans.h" |
37 | #include "xfs_trans_priv.h" | |
38 | #include "xfs_log.h" | |
1da177e4 | 39 | #include "xfs_error.h" |
1da177e4 LT |
40 | #include "xfs_quota.h" |
41 | #include "xfs_fsops.h" | |
0b1b213f | 42 | #include "xfs_trace.h" |
6d8b79cf | 43 | #include "xfs_icache.h" |
a31b1d3d | 44 | #include "xfs_sysfs.h" |
035e00ac | 45 | #include "xfs_rmap_btree.h" |
1946b91c | 46 | #include "xfs_refcount_btree.h" |
174edb0e | 47 | #include "xfs_reflink.h" |
ebf55872 | 48 | #include "xfs_extent_busy.h" |
0b1b213f | 49 | |
1da177e4 | 50 | |
27174203 CH |
51 | static DEFINE_MUTEX(xfs_uuid_table_mutex); |
52 | static int xfs_uuid_table_size; | |
53 | static uuid_t *xfs_uuid_table; | |
54 | ||
af3b6382 DW |
55 | void |
56 | xfs_uuid_table_free(void) | |
57 | { | |
58 | if (xfs_uuid_table_size == 0) | |
59 | return; | |
60 | kmem_free(xfs_uuid_table); | |
61 | xfs_uuid_table = NULL; | |
62 | xfs_uuid_table_size = 0; | |
63 | } | |
64 | ||
27174203 CH |
65 | /* |
66 | * See if the UUID is unique among mounted XFS filesystems. | |
67 | * Mount fails if UUID is nil or a FS with the same UUID is already mounted. | |
68 | */ | |
69 | STATIC int | |
70 | xfs_uuid_mount( | |
71 | struct xfs_mount *mp) | |
72 | { | |
73 | uuid_t *uuid = &mp->m_sb.sb_uuid; | |
74 | int hole, i; | |
75 | ||
8f720d9f AG |
76 | /* Publish UUID in struct super_block */ |
77 | BUILD_BUG_ON(sizeof(mp->m_super->s_uuid) != sizeof(uuid_t)); | |
78 | memcpy(&mp->m_super->s_uuid, uuid, sizeof(uuid_t)); | |
79 | ||
27174203 CH |
80 | if (mp->m_flags & XFS_MOUNT_NOUUID) |
81 | return 0; | |
82 | ||
83 | if (uuid_is_nil(uuid)) { | |
0b932ccc | 84 | xfs_warn(mp, "Filesystem has nil UUID - can't mount"); |
2451337d | 85 | return -EINVAL; |
27174203 CH |
86 | } |
87 | ||
88 | mutex_lock(&xfs_uuid_table_mutex); | |
89 | for (i = 0, hole = -1; i < xfs_uuid_table_size; i++) { | |
90 | if (uuid_is_nil(&xfs_uuid_table[i])) { | |
91 | hole = i; | |
92 | continue; | |
93 | } | |
94 | if (uuid_equal(uuid, &xfs_uuid_table[i])) | |
95 | goto out_duplicate; | |
96 | } | |
97 | ||
98 | if (hole < 0) { | |
99 | xfs_uuid_table = kmem_realloc(xfs_uuid_table, | |
100 | (xfs_uuid_table_size + 1) * sizeof(*xfs_uuid_table), | |
27174203 CH |
101 | KM_SLEEP); |
102 | hole = xfs_uuid_table_size++; | |
103 | } | |
104 | xfs_uuid_table[hole] = *uuid; | |
105 | mutex_unlock(&xfs_uuid_table_mutex); | |
106 | ||
107 | return 0; | |
108 | ||
109 | out_duplicate: | |
110 | mutex_unlock(&xfs_uuid_table_mutex); | |
021000e5 | 111 | xfs_warn(mp, "Filesystem has duplicate UUID %pU - can't mount", uuid); |
2451337d | 112 | return -EINVAL; |
27174203 CH |
113 | } |
114 | ||
115 | STATIC void | |
116 | xfs_uuid_unmount( | |
117 | struct xfs_mount *mp) | |
118 | { | |
119 | uuid_t *uuid = &mp->m_sb.sb_uuid; | |
120 | int i; | |
121 | ||
122 | if (mp->m_flags & XFS_MOUNT_NOUUID) | |
123 | return; | |
124 | ||
125 | mutex_lock(&xfs_uuid_table_mutex); | |
126 | for (i = 0; i < xfs_uuid_table_size; i++) { | |
127 | if (uuid_is_nil(&xfs_uuid_table[i])) | |
128 | continue; | |
129 | if (!uuid_equal(uuid, &xfs_uuid_table[i])) | |
130 | continue; | |
131 | memset(&xfs_uuid_table[i], 0, sizeof(uuid_t)); | |
132 | break; | |
133 | } | |
134 | ASSERT(i < xfs_uuid_table_size); | |
135 | mutex_unlock(&xfs_uuid_table_mutex); | |
136 | } | |
137 | ||
138 | ||
e176579e DC |
139 | STATIC void |
140 | __xfs_free_perag( | |
141 | struct rcu_head *head) | |
142 | { | |
143 | struct xfs_perag *pag = container_of(head, struct xfs_perag, rcu_head); | |
144 | ||
145 | ASSERT(atomic_read(&pag->pag_ref) == 0); | |
146 | kmem_free(pag); | |
147 | } | |
148 | ||
1da177e4 | 149 | /* |
e176579e | 150 | * Free up the per-ag resources associated with the mount structure. |
1da177e4 | 151 | */ |
c962fb79 | 152 | STATIC void |
ff4f038c | 153 | xfs_free_perag( |
745f6919 | 154 | xfs_mount_t *mp) |
1da177e4 | 155 | { |
1c1c6ebc DC |
156 | xfs_agnumber_t agno; |
157 | struct xfs_perag *pag; | |
158 | ||
159 | for (agno = 0; agno < mp->m_sb.sb_agcount; agno++) { | |
160 | spin_lock(&mp->m_perag_lock); | |
161 | pag = radix_tree_delete(&mp->m_perag_tree, agno); | |
162 | spin_unlock(&mp->m_perag_lock); | |
e176579e | 163 | ASSERT(pag); |
f83282a8 | 164 | ASSERT(atomic_read(&pag->pag_ref) == 0); |
6031e73a | 165 | xfs_buf_hash_destroy(pag); |
e176579e | 166 | call_rcu(&pag->rcu_head, __xfs_free_perag); |
1da177e4 | 167 | } |
1da177e4 LT |
168 | } |
169 | ||
4cc929ee NS |
170 | /* |
171 | * Check size of device based on the (data/realtime) block count. | |
172 | * Note: this check is used by the growfs code as well as mount. | |
173 | */ | |
174 | int | |
175 | xfs_sb_validate_fsb_count( | |
176 | xfs_sb_t *sbp, | |
177 | __uint64_t nblocks) | |
178 | { | |
179 | ASSERT(PAGE_SHIFT >= sbp->sb_blocklog); | |
180 | ASSERT(sbp->sb_blocklog >= BBSHIFT); | |
181 | ||
d5cf09ba | 182 | /* Limited by ULONG_MAX of page cache index */ |
09cbfeaf | 183 | if (nblocks >> (PAGE_SHIFT - sbp->sb_blocklog) > ULONG_MAX) |
2451337d | 184 | return -EFBIG; |
4cc929ee NS |
185 | return 0; |
186 | } | |
1da177e4 | 187 | |
1c1c6ebc | 188 | int |
c11e2c36 | 189 | xfs_initialize_perag( |
c11e2c36 | 190 | xfs_mount_t *mp, |
1c1c6ebc DC |
191 | xfs_agnumber_t agcount, |
192 | xfs_agnumber_t *maxagi) | |
1da177e4 | 193 | { |
2d2194f6 | 194 | xfs_agnumber_t index; |
b20fe473 | 195 | xfs_agnumber_t first_initialised = NULLAGNUMBER; |
1da177e4 | 196 | xfs_perag_t *pag; |
8b26c582 | 197 | int error = -ENOMEM; |
1da177e4 | 198 | |
1c1c6ebc DC |
199 | /* |
200 | * Walk the current per-ag tree so we don't try to initialise AGs | |
201 | * that already exist (growfs case). Allocate and insert all the | |
202 | * AGs we don't find ready for initialisation. | |
203 | */ | |
204 | for (index = 0; index < agcount; index++) { | |
205 | pag = xfs_perag_get(mp, index); | |
206 | if (pag) { | |
207 | xfs_perag_put(pag); | |
208 | continue; | |
209 | } | |
fb3b504a | 210 | |
1c1c6ebc DC |
211 | pag = kmem_zalloc(sizeof(*pag), KM_MAYFAIL); |
212 | if (!pag) | |
b20fe473 | 213 | goto out_unwind_new_pags; |
fb3b504a CH |
214 | pag->pag_agno = index; |
215 | pag->pag_mount = mp; | |
1a427ab0 | 216 | spin_lock_init(&pag->pag_ici_lock); |
69b491c2 | 217 | mutex_init(&pag->pag_ici_reclaim_lock); |
fb3b504a | 218 | INIT_RADIX_TREE(&pag->pag_ici_root, GFP_ATOMIC); |
6031e73a | 219 | if (xfs_buf_hash_init(pag)) |
b20fe473 | 220 | goto out_free_pag; |
ebf55872 | 221 | init_waitqueue_head(&pag->pagb_wait); |
fb3b504a | 222 | |
1c1c6ebc | 223 | if (radix_tree_preload(GFP_NOFS)) |
b20fe473 | 224 | goto out_hash_destroy; |
fb3b504a | 225 | |
1c1c6ebc DC |
226 | spin_lock(&mp->m_perag_lock); |
227 | if (radix_tree_insert(&mp->m_perag_tree, index, pag)) { | |
228 | BUG(); | |
229 | spin_unlock(&mp->m_perag_lock); | |
8b26c582 DC |
230 | radix_tree_preload_end(); |
231 | error = -EEXIST; | |
b20fe473 | 232 | goto out_hash_destroy; |
1c1c6ebc DC |
233 | } |
234 | spin_unlock(&mp->m_perag_lock); | |
235 | radix_tree_preload_end(); | |
b20fe473 BD |
236 | /* first new pag is fully initialized */ |
237 | if (first_initialised == NULLAGNUMBER) | |
238 | first_initialised = index; | |
1c1c6ebc DC |
239 | } |
240 | ||
12c3f05c | 241 | index = xfs_set_inode_alloc(mp, agcount); |
fb3b504a | 242 | |
1c1c6ebc DC |
243 | if (maxagi) |
244 | *maxagi = index; | |
8018026e DW |
245 | |
246 | mp->m_ag_prealloc_blocks = xfs_prealloc_blocks(mp); | |
1c1c6ebc | 247 | return 0; |
8b26c582 | 248 | |
b20fe473 | 249 | out_hash_destroy: |
6031e73a | 250 | xfs_buf_hash_destroy(pag); |
b20fe473 | 251 | out_free_pag: |
8b26c582 | 252 | kmem_free(pag); |
b20fe473 BD |
253 | out_unwind_new_pags: |
254 | /* unwind any prior newly initialized pags */ | |
255 | for (index = first_initialised; index < agcount; index++) { | |
8b26c582 | 256 | pag = radix_tree_delete(&mp->m_perag_tree, index); |
b20fe473 BD |
257 | if (!pag) |
258 | break; | |
6031e73a | 259 | xfs_buf_hash_destroy(pag); |
8b26c582 DC |
260 | kmem_free(pag); |
261 | } | |
262 | return error; | |
1da177e4 LT |
263 | } |
264 | ||
1da177e4 LT |
265 | /* |
266 | * xfs_readsb | |
267 | * | |
268 | * Does the initial read of the superblock. | |
269 | */ | |
270 | int | |
ff55068c DC |
271 | xfs_readsb( |
272 | struct xfs_mount *mp, | |
273 | int flags) | |
1da177e4 LT |
274 | { |
275 | unsigned int sector_size; | |
04a1e6c5 DC |
276 | struct xfs_buf *bp; |
277 | struct xfs_sb *sbp = &mp->m_sb; | |
1da177e4 | 278 | int error; |
af34e09d | 279 | int loud = !(flags & XFS_MFSI_QUIET); |
daba5427 | 280 | const struct xfs_buf_ops *buf_ops; |
1da177e4 LT |
281 | |
282 | ASSERT(mp->m_sb_bp == NULL); | |
283 | ASSERT(mp->m_ddev_targp != NULL); | |
284 | ||
daba5427 ES |
285 | /* |
286 | * For the initial read, we must guess at the sector | |
287 | * size based on the block device. It's enough to | |
288 | * get the sb_sectsize out of the superblock and | |
289 | * then reread with the proper length. | |
290 | * We don't verify it yet, because it may not be complete. | |
291 | */ | |
292 | sector_size = xfs_getsize_buftarg(mp->m_ddev_targp); | |
293 | buf_ops = NULL; | |
294 | ||
1da177e4 | 295 | /* |
c891c30a BF |
296 | * Allocate a (locked) buffer to hold the superblock. This will be kept |
297 | * around at all times to optimize access to the superblock. Therefore, | |
298 | * set XBF_NO_IOACCT to make sure it doesn't hold the buftarg count | |
299 | * elevated. | |
1da177e4 | 300 | */ |
26af6552 | 301 | reread: |
ba372674 | 302 | error = xfs_buf_read_uncached(mp->m_ddev_targp, XFS_SB_DADDR, |
c891c30a BF |
303 | BTOBB(sector_size), XBF_NO_IOACCT, &bp, |
304 | buf_ops); | |
ba372674 | 305 | if (error) { |
eab4e633 | 306 | if (loud) |
e721f504 | 307 | xfs_warn(mp, "SB validate failed with error %d.", error); |
ac75a1f7 | 308 | /* bad CRC means corrupted metadata */ |
2451337d DC |
309 | if (error == -EFSBADCRC) |
310 | error = -EFSCORRUPTED; | |
ba372674 | 311 | return error; |
eab4e633 | 312 | } |
1da177e4 LT |
313 | |
314 | /* | |
315 | * Initialize the mount structure from the superblock. | |
1da177e4 | 316 | */ |
556b8883 | 317 | xfs_sb_from_disk(sbp, XFS_BUF_TO_SBP(bp)); |
556b8883 DC |
318 | |
319 | /* | |
320 | * If we haven't validated the superblock, do so now before we try | |
321 | * to check the sector size and reread the superblock appropriately. | |
322 | */ | |
323 | if (sbp->sb_magicnum != XFS_SB_MAGIC) { | |
324 | if (loud) | |
325 | xfs_warn(mp, "Invalid superblock magic number"); | |
2451337d | 326 | error = -EINVAL; |
556b8883 DC |
327 | goto release_buf; |
328 | } | |
ff55068c | 329 | |
1da177e4 LT |
330 | /* |
331 | * We must be able to do sector-sized and sector-aligned IO. | |
332 | */ | |
04a1e6c5 | 333 | if (sector_size > sbp->sb_sectsize) { |
af34e09d DC |
334 | if (loud) |
335 | xfs_warn(mp, "device supports %u byte sectors (not %u)", | |
04a1e6c5 | 336 | sector_size, sbp->sb_sectsize); |
2451337d | 337 | error = -ENOSYS; |
26af6552 | 338 | goto release_buf; |
1da177e4 LT |
339 | } |
340 | ||
daba5427 | 341 | if (buf_ops == NULL) { |
556b8883 DC |
342 | /* |
343 | * Re-read the superblock so the buffer is correctly sized, | |
344 | * and properly verified. | |
345 | */ | |
1da177e4 | 346 | xfs_buf_relse(bp); |
04a1e6c5 | 347 | sector_size = sbp->sb_sectsize; |
daba5427 | 348 | buf_ops = loud ? &xfs_sb_buf_ops : &xfs_sb_quiet_buf_ops; |
26af6552 | 349 | goto reread; |
1da177e4 LT |
350 | } |
351 | ||
5681ca40 | 352 | xfs_reinit_percpu_counters(mp); |
8d280b98 | 353 | |
04a1e6c5 DC |
354 | /* no need to be quiet anymore, so reset the buf ops */ |
355 | bp->b_ops = &xfs_sb_buf_ops; | |
356 | ||
1da177e4 | 357 | mp->m_sb_bp = bp; |
26af6552 | 358 | xfs_buf_unlock(bp); |
1da177e4 LT |
359 | return 0; |
360 | ||
26af6552 DC |
361 | release_buf: |
362 | xfs_buf_relse(bp); | |
1da177e4 LT |
363 | return error; |
364 | } | |
365 | ||
1da177e4 | 366 | /* |
0771fb45 | 367 | * Update alignment values based on mount options and sb values |
1da177e4 | 368 | */ |
0771fb45 | 369 | STATIC int |
7884bc86 | 370 | xfs_update_alignment(xfs_mount_t *mp) |
1da177e4 | 371 | { |
1da177e4 | 372 | xfs_sb_t *sbp = &(mp->m_sb); |
1da177e4 | 373 | |
4249023a | 374 | if (mp->m_dalign) { |
1da177e4 LT |
375 | /* |
376 | * If stripe unit and stripe width are not multiples | |
377 | * of the fs blocksize turn off alignment. | |
378 | */ | |
379 | if ((BBTOB(mp->m_dalign) & mp->m_blockmask) || | |
380 | (BBTOB(mp->m_swidth) & mp->m_blockmask)) { | |
39a45d84 JL |
381 | xfs_warn(mp, |
382 | "alignment check failed: sunit/swidth vs. blocksize(%d)", | |
383 | sbp->sb_blocksize); | |
2451337d | 384 | return -EINVAL; |
1da177e4 LT |
385 | } else { |
386 | /* | |
387 | * Convert the stripe unit and width to FSBs. | |
388 | */ | |
389 | mp->m_dalign = XFS_BB_TO_FSBT(mp, mp->m_dalign); | |
390 | if (mp->m_dalign && (sbp->sb_agblocks % mp->m_dalign)) { | |
53487786 | 391 | xfs_warn(mp, |
39a45d84 JL |
392 | "alignment check failed: sunit/swidth vs. agsize(%d)", |
393 | sbp->sb_agblocks); | |
2451337d | 394 | return -EINVAL; |
1da177e4 LT |
395 | } else if (mp->m_dalign) { |
396 | mp->m_swidth = XFS_BB_TO_FSBT(mp, mp->m_swidth); | |
397 | } else { | |
39a45d84 JL |
398 | xfs_warn(mp, |
399 | "alignment check failed: sunit(%d) less than bsize(%d)", | |
400 | mp->m_dalign, sbp->sb_blocksize); | |
2451337d | 401 | return -EINVAL; |
1da177e4 LT |
402 | } |
403 | } | |
404 | ||
405 | /* | |
406 | * Update superblock with new values | |
407 | * and log changes | |
408 | */ | |
62118709 | 409 | if (xfs_sb_version_hasdalign(sbp)) { |
1da177e4 LT |
410 | if (sbp->sb_unit != mp->m_dalign) { |
411 | sbp->sb_unit = mp->m_dalign; | |
61e63ecb | 412 | mp->m_update_sb = true; |
1da177e4 LT |
413 | } |
414 | if (sbp->sb_width != mp->m_swidth) { | |
415 | sbp->sb_width = mp->m_swidth; | |
61e63ecb | 416 | mp->m_update_sb = true; |
1da177e4 | 417 | } |
34d7f603 JL |
418 | } else { |
419 | xfs_warn(mp, | |
420 | "cannot change alignment: superblock does not support data alignment"); | |
2451337d | 421 | return -EINVAL; |
1da177e4 LT |
422 | } |
423 | } else if ((mp->m_flags & XFS_MOUNT_NOALIGN) != XFS_MOUNT_NOALIGN && | |
62118709 | 424 | xfs_sb_version_hasdalign(&mp->m_sb)) { |
1da177e4 LT |
425 | mp->m_dalign = sbp->sb_unit; |
426 | mp->m_swidth = sbp->sb_width; | |
427 | } | |
428 | ||
0771fb45 ES |
429 | return 0; |
430 | } | |
1da177e4 | 431 | |
0771fb45 ES |
432 | /* |
433 | * Set the maximum inode count for this filesystem | |
434 | */ | |
435 | STATIC void | |
436 | xfs_set_maxicount(xfs_mount_t *mp) | |
437 | { | |
438 | xfs_sb_t *sbp = &(mp->m_sb); | |
439 | __uint64_t icount; | |
1da177e4 | 440 | |
0771fb45 ES |
441 | if (sbp->sb_imax_pct) { |
442 | /* | |
443 | * Make sure the maximum inode count is a multiple | |
444 | * of the units we allocate inodes in. | |
1da177e4 | 445 | */ |
1da177e4 LT |
446 | icount = sbp->sb_dblocks * sbp->sb_imax_pct; |
447 | do_div(icount, 100); | |
448 | do_div(icount, mp->m_ialloc_blks); | |
449 | mp->m_maxicount = (icount * mp->m_ialloc_blks) << | |
450 | sbp->sb_inopblog; | |
0771fb45 | 451 | } else { |
1da177e4 | 452 | mp->m_maxicount = 0; |
1da177e4 | 453 | } |
0771fb45 ES |
454 | } |
455 | ||
456 | /* | |
457 | * Set the default minimum read and write sizes unless | |
458 | * already specified in a mount option. | |
459 | * We use smaller I/O sizes when the file system | |
460 | * is being used for NFS service (wsync mount option). | |
461 | */ | |
462 | STATIC void | |
463 | xfs_set_rw_sizes(xfs_mount_t *mp) | |
464 | { | |
465 | xfs_sb_t *sbp = &(mp->m_sb); | |
466 | int readio_log, writeio_log; | |
1da177e4 | 467 | |
1da177e4 LT |
468 | if (!(mp->m_flags & XFS_MOUNT_DFLT_IOSIZE)) { |
469 | if (mp->m_flags & XFS_MOUNT_WSYNC) { | |
470 | readio_log = XFS_WSYNC_READIO_LOG; | |
471 | writeio_log = XFS_WSYNC_WRITEIO_LOG; | |
472 | } else { | |
473 | readio_log = XFS_READIO_LOG_LARGE; | |
474 | writeio_log = XFS_WRITEIO_LOG_LARGE; | |
475 | } | |
476 | } else { | |
477 | readio_log = mp->m_readio_log; | |
478 | writeio_log = mp->m_writeio_log; | |
479 | } | |
480 | ||
1da177e4 LT |
481 | if (sbp->sb_blocklog > readio_log) { |
482 | mp->m_readio_log = sbp->sb_blocklog; | |
483 | } else { | |
484 | mp->m_readio_log = readio_log; | |
485 | } | |
486 | mp->m_readio_blocks = 1 << (mp->m_readio_log - sbp->sb_blocklog); | |
487 | if (sbp->sb_blocklog > writeio_log) { | |
488 | mp->m_writeio_log = sbp->sb_blocklog; | |
489 | } else { | |
490 | mp->m_writeio_log = writeio_log; | |
491 | } | |
492 | mp->m_writeio_blocks = 1 << (mp->m_writeio_log - sbp->sb_blocklog); | |
0771fb45 | 493 | } |
1da177e4 | 494 | |
055388a3 DC |
495 | /* |
496 | * precalculate the low space thresholds for dynamic speculative preallocation. | |
497 | */ | |
498 | void | |
499 | xfs_set_low_space_thresholds( | |
500 | struct xfs_mount *mp) | |
501 | { | |
502 | int i; | |
503 | ||
504 | for (i = 0; i < XFS_LOWSP_MAX; i++) { | |
505 | __uint64_t space = mp->m_sb.sb_dblocks; | |
506 | ||
507 | do_div(space, 100); | |
508 | mp->m_low_space[i] = space * (i + 1); | |
509 | } | |
510 | } | |
511 | ||
512 | ||
0771fb45 ES |
513 | /* |
514 | * Set whether we're using inode alignment. | |
515 | */ | |
516 | STATIC void | |
517 | xfs_set_inoalignment(xfs_mount_t *mp) | |
518 | { | |
62118709 | 519 | if (xfs_sb_version_hasalign(&mp->m_sb) && |
d5825712 | 520 | mp->m_sb.sb_inoalignmt >= xfs_icluster_size_fsb(mp)) |
1da177e4 LT |
521 | mp->m_inoalign_mask = mp->m_sb.sb_inoalignmt - 1; |
522 | else | |
523 | mp->m_inoalign_mask = 0; | |
524 | /* | |
525 | * If we are using stripe alignment, check whether | |
526 | * the stripe unit is a multiple of the inode alignment | |
527 | */ | |
528 | if (mp->m_dalign && mp->m_inoalign_mask && | |
529 | !(mp->m_dalign & mp->m_inoalign_mask)) | |
530 | mp->m_sinoalign = mp->m_dalign; | |
531 | else | |
532 | mp->m_sinoalign = 0; | |
0771fb45 ES |
533 | } |
534 | ||
535 | /* | |
0471f62e | 536 | * Check that the data (and log if separate) is an ok size. |
0771fb45 ES |
537 | */ |
538 | STATIC int | |
ba372674 DC |
539 | xfs_check_sizes( |
540 | struct xfs_mount *mp) | |
0771fb45 | 541 | { |
ba372674 | 542 | struct xfs_buf *bp; |
0771fb45 | 543 | xfs_daddr_t d; |
ba372674 | 544 | int error; |
0771fb45 | 545 | |
1da177e4 LT |
546 | d = (xfs_daddr_t)XFS_FSB_TO_BB(mp, mp->m_sb.sb_dblocks); |
547 | if (XFS_BB_TO_FSB(mp, d) != mp->m_sb.sb_dblocks) { | |
0b932ccc | 548 | xfs_warn(mp, "filesystem size mismatch detected"); |
2451337d | 549 | return -EFBIG; |
1da177e4 | 550 | } |
ba372674 | 551 | error = xfs_buf_read_uncached(mp->m_ddev_targp, |
1922c949 | 552 | d - XFS_FSS_TO_BB(mp, 1), |
ba372674 DC |
553 | XFS_FSS_TO_BB(mp, 1), 0, &bp, NULL); |
554 | if (error) { | |
0b932ccc | 555 | xfs_warn(mp, "last sector read failed"); |
ba372674 | 556 | return error; |
1da177e4 | 557 | } |
1922c949 | 558 | xfs_buf_relse(bp); |
1da177e4 | 559 | |
ba372674 DC |
560 | if (mp->m_logdev_targp == mp->m_ddev_targp) |
561 | return 0; | |
562 | ||
563 | d = (xfs_daddr_t)XFS_FSB_TO_BB(mp, mp->m_sb.sb_logblocks); | |
564 | if (XFS_BB_TO_FSB(mp, d) != mp->m_sb.sb_logblocks) { | |
565 | xfs_warn(mp, "log size mismatch detected"); | |
566 | return -EFBIG; | |
567 | } | |
568 | error = xfs_buf_read_uncached(mp->m_logdev_targp, | |
1922c949 | 569 | d - XFS_FSB_TO_BB(mp, 1), |
ba372674 DC |
570 | XFS_FSB_TO_BB(mp, 1), 0, &bp, NULL); |
571 | if (error) { | |
572 | xfs_warn(mp, "log device read failed"); | |
573 | return error; | |
0771fb45 | 574 | } |
ba372674 | 575 | xfs_buf_relse(bp); |
0771fb45 ES |
576 | return 0; |
577 | } | |
578 | ||
7d095257 CH |
579 | /* |
580 | * Clear the quotaflags in memory and in the superblock. | |
581 | */ | |
582 | int | |
583 | xfs_mount_reset_sbqflags( | |
584 | struct xfs_mount *mp) | |
585 | { | |
7d095257 CH |
586 | mp->m_qflags = 0; |
587 | ||
61e63ecb | 588 | /* It is OK to look at sb_qflags in the mount path without m_sb_lock. */ |
7d095257 CH |
589 | if (mp->m_sb.sb_qflags == 0) |
590 | return 0; | |
591 | spin_lock(&mp->m_sb_lock); | |
592 | mp->m_sb.sb_qflags = 0; | |
593 | spin_unlock(&mp->m_sb_lock); | |
594 | ||
61e63ecb | 595 | if (!xfs_fs_writable(mp, SB_FREEZE_WRITE)) |
7d095257 CH |
596 | return 0; |
597 | ||
61e63ecb | 598 | return xfs_sync_sb(mp, false); |
7d095257 CH |
599 | } |
600 | ||
d5db0f97 ES |
601 | __uint64_t |
602 | xfs_default_resblks(xfs_mount_t *mp) | |
603 | { | |
604 | __uint64_t resblks; | |
605 | ||
606 | /* | |
8babd8a2 DC |
607 | * We default to 5% or 8192 fsbs of space reserved, whichever is |
608 | * smaller. This is intended to cover concurrent allocation | |
609 | * transactions when we initially hit enospc. These each require a 4 | |
610 | * block reservation. Hence by default we cover roughly 2000 concurrent | |
611 | * allocation reservations. | |
d5db0f97 ES |
612 | */ |
613 | resblks = mp->m_sb.sb_dblocks; | |
614 | do_div(resblks, 20); | |
8babd8a2 | 615 | resblks = min_t(__uint64_t, resblks, 8192); |
d5db0f97 ES |
616 | return resblks; |
617 | } | |
618 | ||
0771fb45 | 619 | /* |
0771fb45 ES |
620 | * This function does the following on an initial mount of a file system: |
621 | * - reads the superblock from disk and init the mount struct | |
622 | * - if we're a 32-bit kernel, do a size check on the superblock | |
623 | * so we don't mount terabyte filesystems | |
624 | * - init mount struct realtime fields | |
625 | * - allocate inode hash table for fs | |
626 | * - init directory manager | |
627 | * - perform recovery and init the log manager | |
628 | */ | |
629 | int | |
630 | xfs_mountfs( | |
f0b2efad | 631 | struct xfs_mount *mp) |
0771fb45 | 632 | { |
f0b2efad BF |
633 | struct xfs_sb *sbp = &(mp->m_sb); |
634 | struct xfs_inode *rip; | |
635 | __uint64_t resblks; | |
636 | uint quotamount = 0; | |
637 | uint quotaflags = 0; | |
638 | int error = 0; | |
0771fb45 | 639 | |
ff55068c | 640 | xfs_sb_mount_common(mp, sbp); |
0771fb45 | 641 | |
ee1c0908 | 642 | /* |
074e427b DC |
643 | * Check for a mismatched features2 values. Older kernels read & wrote |
644 | * into the wrong sb offset for sb_features2 on some platforms due to | |
645 | * xfs_sb_t not being 64bit size aligned when sb_features2 was added, | |
646 | * which made older superblock reading/writing routines swap it as a | |
647 | * 64-bit value. | |
ee1c0908 | 648 | * |
e6957ea4 ES |
649 | * For backwards compatibility, we make both slots equal. |
650 | * | |
074e427b DC |
651 | * If we detect a mismatched field, we OR the set bits into the existing |
652 | * features2 field in case it has already been modified; we don't want | |
653 | * to lose any features. We then update the bad location with the ORed | |
654 | * value so that older kernels will see any features2 flags. The | |
655 | * superblock writeback code ensures the new sb_features2 is copied to | |
656 | * sb_bad_features2 before it is logged or written to disk. | |
ee1c0908 | 657 | */ |
e6957ea4 | 658 | if (xfs_sb_has_mismatched_features2(sbp)) { |
0b932ccc | 659 | xfs_warn(mp, "correcting sb_features alignment problem"); |
ee1c0908 | 660 | sbp->sb_features2 |= sbp->sb_bad_features2; |
61e63ecb | 661 | mp->m_update_sb = true; |
e6957ea4 ES |
662 | |
663 | /* | |
664 | * Re-check for ATTR2 in case it was found in bad_features2 | |
665 | * slot. | |
666 | */ | |
7c12f296 TS |
667 | if (xfs_sb_version_hasattr2(&mp->m_sb) && |
668 | !(mp->m_flags & XFS_MOUNT_NOATTR2)) | |
e6957ea4 | 669 | mp->m_flags |= XFS_MOUNT_ATTR2; |
7c12f296 TS |
670 | } |
671 | ||
672 | if (xfs_sb_version_hasattr2(&mp->m_sb) && | |
673 | (mp->m_flags & XFS_MOUNT_NOATTR2)) { | |
674 | xfs_sb_version_removeattr2(&mp->m_sb); | |
61e63ecb | 675 | mp->m_update_sb = true; |
e6957ea4 | 676 | |
7c12f296 TS |
677 | /* update sb_versionnum for the clearing of the morebits */ |
678 | if (!sbp->sb_features2) | |
61e63ecb | 679 | mp->m_update_sb = true; |
ee1c0908 DC |
680 | } |
681 | ||
263997a6 DC |
682 | /* always use v2 inodes by default now */ |
683 | if (!(mp->m_sb.sb_versionnum & XFS_SB_VERSION_NLINKBIT)) { | |
684 | mp->m_sb.sb_versionnum |= XFS_SB_VERSION_NLINKBIT; | |
61e63ecb | 685 | mp->m_update_sb = true; |
263997a6 DC |
686 | } |
687 | ||
0771fb45 ES |
688 | /* |
689 | * Check if sb_agblocks is aligned at stripe boundary | |
690 | * If sb_agblocks is NOT aligned turn off m_dalign since | |
691 | * allocator alignment is within an ag, therefore ag has | |
692 | * to be aligned at stripe boundary. | |
693 | */ | |
7884bc86 | 694 | error = xfs_update_alignment(mp); |
0771fb45 | 695 | if (error) |
f9057e3d | 696 | goto out; |
0771fb45 ES |
697 | |
698 | xfs_alloc_compute_maxlevels(mp); | |
699 | xfs_bmap_compute_maxlevels(mp, XFS_DATA_FORK); | |
700 | xfs_bmap_compute_maxlevels(mp, XFS_ATTR_FORK); | |
701 | xfs_ialloc_compute_maxlevels(mp); | |
035e00ac | 702 | xfs_rmapbt_compute_maxlevels(mp); |
1946b91c | 703 | xfs_refcountbt_compute_maxlevels(mp); |
0771fb45 ES |
704 | |
705 | xfs_set_maxicount(mp); | |
706 | ||
e6b3bb78 CM |
707 | /* enable fail_at_unmount as default */ |
708 | mp->m_fail_unmount = 1; | |
709 | ||
a31b1d3d | 710 | error = xfs_sysfs_init(&mp->m_kobj, &xfs_mp_ktype, NULL, mp->m_fsname); |
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 | ||
192852be CM |
723 | |
724 | error = xfs_uuid_mount(mp); | |
725 | if (error) | |
726 | goto out_remove_error_sysfs; | |
727 | ||
0771fb45 ES |
728 | /* |
729 | * Set the minimum read and write sizes | |
730 | */ | |
731 | xfs_set_rw_sizes(mp); | |
732 | ||
055388a3 DC |
733 | /* set the low space thresholds for dynamic preallocation */ |
734 | xfs_set_low_space_thresholds(mp); | |
735 | ||
0771fb45 ES |
736 | /* |
737 | * Set the inode cluster size. | |
738 | * This may still be overridden by the file system | |
739 | * block size if it is larger than the chosen cluster size. | |
8f80587b DC |
740 | * |
741 | * For v5 filesystems, scale the cluster size with the inode size to | |
742 | * keep a constant ratio of inode per cluster buffer, but only if mkfs | |
743 | * has set the inode alignment value appropriately for larger cluster | |
744 | * sizes. | |
0771fb45 ES |
745 | */ |
746 | mp->m_inode_cluster_size = XFS_INODE_BIG_CLUSTER_SIZE; | |
8f80587b DC |
747 | if (xfs_sb_version_hascrc(&mp->m_sb)) { |
748 | int new_size = mp->m_inode_cluster_size; | |
749 | ||
750 | new_size *= mp->m_sb.sb_inodesize / XFS_DINODE_MIN_SIZE; | |
751 | if (mp->m_sb.sb_inoalignmt >= XFS_B_TO_FSBT(mp, new_size)) | |
752 | mp->m_inode_cluster_size = new_size; | |
8f80587b | 753 | } |
0771fb45 | 754 | |
e5376fc1 BF |
755 | /* |
756 | * If enabled, sparse inode chunk alignment is expected to match the | |
757 | * cluster size. Full inode chunk alignment must match the chunk size, | |
758 | * but that is checked on sb read verification... | |
759 | */ | |
760 | if (xfs_sb_version_hassparseinodes(&mp->m_sb) && | |
761 | mp->m_sb.sb_spino_align != | |
762 | XFS_B_TO_FSBT(mp, mp->m_inode_cluster_size)) { | |
763 | xfs_warn(mp, | |
764 | "Sparse inode block alignment (%u) must match cluster size (%llu).", | |
765 | mp->m_sb.sb_spino_align, | |
766 | XFS_B_TO_FSBT(mp, mp->m_inode_cluster_size)); | |
767 | error = -EINVAL; | |
768 | goto out_remove_uuid; | |
769 | } | |
770 | ||
0771fb45 ES |
771 | /* |
772 | * Set inode alignment fields | |
773 | */ | |
774 | xfs_set_inoalignment(mp); | |
775 | ||
776 | /* | |
c2bfbc9b | 777 | * Check that the data (and log if separate) is an ok size. |
0771fb45 | 778 | */ |
4249023a | 779 | error = xfs_check_sizes(mp); |
0771fb45 | 780 | if (error) |
f9057e3d | 781 | goto out_remove_uuid; |
0771fb45 | 782 | |
1da177e4 LT |
783 | /* |
784 | * Initialize realtime fields in the mount structure | |
785 | */ | |
0771fb45 ES |
786 | error = xfs_rtmount_init(mp); |
787 | if (error) { | |
0b932ccc | 788 | xfs_warn(mp, "RT mount failed"); |
f9057e3d | 789 | goto out_remove_uuid; |
1da177e4 LT |
790 | } |
791 | ||
1da177e4 LT |
792 | /* |
793 | * Copies the low order bits of the timestamp and the randomly | |
794 | * set "sequence" number out of a UUID. | |
795 | */ | |
796 | uuid_getnodeuniq(&sbp->sb_uuid, mp->m_fixedfsid); | |
797 | ||
1da177e4 LT |
798 | mp->m_dmevmask = 0; /* not persistent; set after each mount */ |
799 | ||
0650b554 DC |
800 | error = xfs_da_mount(mp); |
801 | if (error) { | |
802 | xfs_warn(mp, "Failed dir/attr init: %d", error); | |
803 | goto out_remove_uuid; | |
804 | } | |
1da177e4 LT |
805 | |
806 | /* | |
807 | * Initialize the precomputed transaction reservations values. | |
808 | */ | |
809 | xfs_trans_init(mp); | |
810 | ||
1da177e4 LT |
811 | /* |
812 | * Allocate and initialize the per-ag data. | |
813 | */ | |
1c1c6ebc | 814 | spin_lock_init(&mp->m_perag_lock); |
9b98b6f3 | 815 | INIT_RADIX_TREE(&mp->m_perag_tree, GFP_ATOMIC); |
1c1c6ebc DC |
816 | error = xfs_initialize_perag(mp, sbp->sb_agcount, &mp->m_maxagi); |
817 | if (error) { | |
0b932ccc | 818 | xfs_warn(mp, "Failed per-ag init: %d", error); |
0650b554 | 819 | goto out_free_dir; |
1c1c6ebc | 820 | } |
1da177e4 | 821 | |
f9057e3d | 822 | if (!sbp->sb_logblocks) { |
0b932ccc | 823 | xfs_warn(mp, "no log defined"); |
f9057e3d | 824 | XFS_ERROR_REPORT("xfs_mountfs", XFS_ERRLEVEL_LOW, mp); |
2451337d | 825 | error = -EFSCORRUPTED; |
f9057e3d CH |
826 | goto out_free_perag; |
827 | } | |
828 | ||
1da177e4 | 829 | /* |
f0b2efad BF |
830 | * Log's mount-time initialization. The first part of recovery can place |
831 | * some items on the AIL, to be handled when recovery is finished or | |
832 | * cancelled. | |
1da177e4 | 833 | */ |
f9057e3d CH |
834 | error = xfs_log_mount(mp, mp->m_logdev_targp, |
835 | XFS_FSB_TO_DADDR(mp, sbp->sb_logstart), | |
836 | XFS_FSB_TO_BB(mp, sbp->sb_logblocks)); | |
837 | if (error) { | |
0b932ccc | 838 | xfs_warn(mp, "log mount failed"); |
d4f3512b | 839 | goto out_fail_wait; |
1da177e4 LT |
840 | } |
841 | ||
92821e2b DC |
842 | /* |
843 | * Now the log is mounted, we know if it was an unclean shutdown or | |
844 | * not. If it was, with the first phase of recovery has completed, we | |
845 | * have consistent AG blocks on disk. We have not recovered EFIs yet, | |
846 | * but they are recovered transactionally in the second recovery phase | |
847 | * later. | |
848 | * | |
849 | * Hence we can safely re-initialise incore superblock counters from | |
850 | * the per-ag data. These may not be correct if the filesystem was not | |
851 | * cleanly unmounted, so we need to wait for recovery to finish before | |
852 | * doing this. | |
853 | * | |
854 | * If the filesystem was cleanly unmounted, then we can trust the | |
855 | * values in the superblock to be correct and we don't need to do | |
856 | * anything here. | |
857 | * | |
858 | * If we are currently making the filesystem, the initialisation will | |
859 | * fail as the perag data is in an undefined state. | |
860 | */ | |
92821e2b DC |
861 | if (xfs_sb_version_haslazysbcount(&mp->m_sb) && |
862 | !XFS_LAST_UNMOUNT_WAS_CLEAN(mp) && | |
863 | !mp->m_sb.sb_inprogress) { | |
864 | error = xfs_initialize_perag_data(mp, sbp->sb_agcount); | |
f9057e3d | 865 | if (error) |
6eee8972 | 866 | goto out_log_dealloc; |
92821e2b | 867 | } |
f9057e3d | 868 | |
1da177e4 LT |
869 | /* |
870 | * Get and sanity-check the root inode. | |
871 | * Save the pointer to it in the mount structure. | |
872 | */ | |
7b6259e7 | 873 | error = xfs_iget(mp, NULL, sbp->sb_rootino, 0, XFS_ILOCK_EXCL, &rip); |
1da177e4 | 874 | if (error) { |
0b932ccc | 875 | xfs_warn(mp, "failed to read root inode"); |
f9057e3d | 876 | goto out_log_dealloc; |
1da177e4 LT |
877 | } |
878 | ||
879 | ASSERT(rip != NULL); | |
1da177e4 | 880 | |
c19b3b05 | 881 | if (unlikely(!S_ISDIR(VFS_I(rip)->i_mode))) { |
0b932ccc | 882 | xfs_warn(mp, "corrupted root inode %llu: not a directory", |
b6574520 | 883 | (unsigned long long)rip->i_ino); |
1da177e4 LT |
884 | xfs_iunlock(rip, XFS_ILOCK_EXCL); |
885 | XFS_ERROR_REPORT("xfs_mountfs_int(2)", XFS_ERRLEVEL_LOW, | |
886 | mp); | |
2451337d | 887 | error = -EFSCORRUPTED; |
f9057e3d | 888 | goto out_rele_rip; |
1da177e4 LT |
889 | } |
890 | mp->m_rootip = rip; /* save it */ | |
891 | ||
892 | xfs_iunlock(rip, XFS_ILOCK_EXCL); | |
893 | ||
894 | /* | |
895 | * Initialize realtime inode pointers in the mount structure | |
896 | */ | |
0771fb45 ES |
897 | error = xfs_rtmount_inodes(mp); |
898 | if (error) { | |
1da177e4 LT |
899 | /* |
900 | * Free up the root inode. | |
901 | */ | |
0b932ccc | 902 | xfs_warn(mp, "failed to read RT inodes"); |
f9057e3d | 903 | goto out_rele_rip; |
1da177e4 LT |
904 | } |
905 | ||
906 | /* | |
7884bc86 CH |
907 | * If this is a read-only mount defer the superblock updates until |
908 | * the next remount into writeable mode. Otherwise we would never | |
909 | * perform the update e.g. for the root filesystem. | |
1da177e4 | 910 | */ |
61e63ecb DC |
911 | if (mp->m_update_sb && !(mp->m_flags & XFS_MOUNT_RDONLY)) { |
912 | error = xfs_sync_sb(mp, false); | |
e5720eec | 913 | if (error) { |
0b932ccc | 914 | xfs_warn(mp, "failed to write sb changes"); |
b93b6e43 | 915 | goto out_rtunmount; |
e5720eec DC |
916 | } |
917 | } | |
1da177e4 LT |
918 | |
919 | /* | |
920 | * Initialise the XFS quota management subsystem for this mount | |
921 | */ | |
7d095257 CH |
922 | if (XFS_IS_QUOTA_RUNNING(mp)) { |
923 | error = xfs_qm_newmount(mp, "amount, "aflags); | |
924 | if (error) | |
925 | goto out_rtunmount; | |
926 | } else { | |
927 | ASSERT(!XFS_IS_QUOTA_ON(mp)); | |
928 | ||
929 | /* | |
930 | * If a file system had quotas running earlier, but decided to | |
931 | * mount without -o uquota/pquota/gquota options, revoke the | |
932 | * quotachecked license. | |
933 | */ | |
934 | if (mp->m_sb.sb_qflags & XFS_ALL_QUOTA_ACCT) { | |
0b932ccc | 935 | xfs_notice(mp, "resetting quota flags"); |
7d095257 CH |
936 | error = xfs_mount_reset_sbqflags(mp); |
937 | if (error) | |
a70a4fa5 | 938 | goto out_rtunmount; |
7d095257 CH |
939 | } |
940 | } | |
1da177e4 | 941 | |
17c12bcd DW |
942 | /* |
943 | * During the second phase of log recovery, we need iget and | |
944 | * iput to behave like they do for an active filesystem. | |
945 | * xfs_fs_drop_inode needs to be able to prevent the deletion | |
946 | * of inodes before we're done replaying log items on those | |
947 | * inodes. | |
948 | */ | |
949 | mp->m_super->s_flags |= MS_ACTIVE; | |
950 | ||
1da177e4 | 951 | /* |
f0b2efad BF |
952 | * Finish recovering the file system. This part needed to be delayed |
953 | * until after the root and real-time bitmap inodes were consistently | |
954 | * read in. | |
1da177e4 | 955 | */ |
4249023a | 956 | error = xfs_log_mount_finish(mp); |
1da177e4 | 957 | if (error) { |
0b932ccc | 958 | xfs_warn(mp, "log mount finish failed"); |
b93b6e43 | 959 | goto out_rtunmount; |
1da177e4 LT |
960 | } |
961 | ||
ddeb14f4 DC |
962 | /* |
963 | * Now the log is fully replayed, we can transition to full read-only | |
964 | * mode for read-only mounts. This will sync all the metadata and clean | |
965 | * the log so that the recovery we just performed does not have to be | |
966 | * replayed again on the next mount. | |
967 | * | |
968 | * We use the same quiesce mechanism as the rw->ro remount, as they are | |
969 | * semantically identical operations. | |
970 | */ | |
971 | if ((mp->m_flags & (XFS_MOUNT_RDONLY|XFS_MOUNT_NORECOVERY)) == | |
972 | XFS_MOUNT_RDONLY) { | |
973 | xfs_quiesce_attr(mp); | |
974 | } | |
975 | ||
1da177e4 LT |
976 | /* |
977 | * Complete the quota initialisation, post-log-replay component. | |
978 | */ | |
7d095257 CH |
979 | if (quotamount) { |
980 | ASSERT(mp->m_qflags == 0); | |
981 | mp->m_qflags = quotaflags; | |
982 | ||
983 | xfs_qm_mount_quotas(mp); | |
984 | } | |
985 | ||
84e1e99f DC |
986 | /* |
987 | * Now we are mounted, reserve a small amount of unused space for | |
988 | * privileged transactions. This is needed so that transaction | |
989 | * space required for critical operations can dip into this pool | |
990 | * when at ENOSPC. This is needed for operations like create with | |
991 | * attr, unwritten extent conversion at ENOSPC, etc. Data allocations | |
992 | * are not allowed to use this reserved space. | |
8babd8a2 DC |
993 | * |
994 | * This may drive us straight to ENOSPC on mount, but that implies | |
995 | * we were already there on the last unmount. Warn if this occurs. | |
84e1e99f | 996 | */ |
d5db0f97 ES |
997 | if (!(mp->m_flags & XFS_MOUNT_RDONLY)) { |
998 | resblks = xfs_default_resblks(mp); | |
999 | error = xfs_reserve_blocks(mp, &resblks, NULL); | |
1000 | if (error) | |
0b932ccc DC |
1001 | xfs_warn(mp, |
1002 | "Unable to allocate reserve blocks. Continuing without reserve pool."); | |
174edb0e DW |
1003 | |
1004 | /* Recover any CoW blocks that never got remapped. */ | |
1005 | error = xfs_reflink_recover_cow(mp); | |
1006 | if (error) { | |
1007 | xfs_err(mp, | |
1008 | "Error %d recovering leftover CoW allocations.", error); | |
1009 | xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE); | |
1010 | goto out_quota; | |
1011 | } | |
84d69619 DW |
1012 | |
1013 | /* Reserve AG blocks for future btree expansion. */ | |
1014 | error = xfs_fs_reserve_ag_blocks(mp); | |
1015 | if (error && error != -ENOSPC) | |
1016 | goto out_agresv; | |
d5db0f97 | 1017 | } |
84e1e99f | 1018 | |
1da177e4 LT |
1019 | return 0; |
1020 | ||
84d69619 DW |
1021 | out_agresv: |
1022 | xfs_fs_unreserve_ag_blocks(mp); | |
174edb0e DW |
1023 | out_quota: |
1024 | xfs_qm_unmount_quotas(mp); | |
b93b6e43 | 1025 | out_rtunmount: |
d0992452 | 1026 | mp->m_super->s_flags &= ~MS_ACTIVE; |
b93b6e43 | 1027 | xfs_rtunmount_inodes(mp); |
f9057e3d | 1028 | out_rele_rip: |
43355099 | 1029 | IRELE(rip); |
0ae120f8 BF |
1030 | cancel_delayed_work_sync(&mp->m_reclaim_work); |
1031 | xfs_reclaim_inodes(mp, SYNC_WAIT); | |
f9057e3d | 1032 | out_log_dealloc: |
e6b3bb78 | 1033 | mp->m_flags |= XFS_MOUNT_UNMOUNTING; |
f0b2efad | 1034 | xfs_log_mount_cancel(mp); |
d4f3512b DC |
1035 | out_fail_wait: |
1036 | if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp) | |
1037 | xfs_wait_buftarg(mp->m_logdev_targp); | |
1038 | xfs_wait_buftarg(mp->m_ddev_targp); | |
f9057e3d | 1039 | out_free_perag: |
ff4f038c | 1040 | xfs_free_perag(mp); |
0650b554 DC |
1041 | out_free_dir: |
1042 | xfs_da_unmount(mp); | |
f9057e3d | 1043 | out_remove_uuid: |
27174203 | 1044 | xfs_uuid_unmount(mp); |
192852be CM |
1045 | out_remove_error_sysfs: |
1046 | xfs_error_sysfs_del(mp); | |
225e4635 BD |
1047 | out_del_stats: |
1048 | xfs_sysfs_del(&mp->m_stats.xs_kobj); | |
a31b1d3d BF |
1049 | out_remove_sysfs: |
1050 | xfs_sysfs_del(&mp->m_kobj); | |
f9057e3d | 1051 | out: |
1da177e4 LT |
1052 | return error; |
1053 | } | |
1054 | ||
1055 | /* | |
1da177e4 LT |
1056 | * This flushes out the inodes,dquots and the superblock, unmounts the |
1057 | * log and makes sure that incore structures are freed. | |
1058 | */ | |
41b5c2e7 CH |
1059 | void |
1060 | xfs_unmountfs( | |
1061 | struct xfs_mount *mp) | |
1da177e4 | 1062 | { |
41b5c2e7 CH |
1063 | __uint64_t resblks; |
1064 | int error; | |
1da177e4 | 1065 | |
579b62fa | 1066 | cancel_delayed_work_sync(&mp->m_eofblocks_work); |
83104d44 | 1067 | cancel_delayed_work_sync(&mp->m_cowblocks_work); |
579b62fa | 1068 | |
84d69619 | 1069 | xfs_fs_unreserve_ag_blocks(mp); |
7d095257 | 1070 | xfs_qm_unmount_quotas(mp); |
b93b6e43 | 1071 | xfs_rtunmount_inodes(mp); |
77508ec8 CH |
1072 | IRELE(mp->m_rootip); |
1073 | ||
641c56fb DC |
1074 | /* |
1075 | * We can potentially deadlock here if we have an inode cluster | |
9da096fd | 1076 | * that has been freed has its buffer still pinned in memory because |
641c56fb DC |
1077 | * the transaction is still sitting in a iclog. The stale inodes |
1078 | * on that buffer will have their flush locks held until the | |
1079 | * transaction hits the disk and the callbacks run. the inode | |
1080 | * flush takes the flush lock unconditionally and with nothing to | |
1081 | * push out the iclog we will never get that unlocked. hence we | |
1082 | * need to force the log first. | |
1083 | */ | |
a14a348b | 1084 | xfs_log_force(mp, XFS_LOG_SYNC); |
c854363e | 1085 | |
ebf55872 CH |
1086 | /* |
1087 | * Wait for all busy extents to be freed, including completion of | |
1088 | * any discard operation. | |
1089 | */ | |
1090 | xfs_extent_busy_wait_all(mp); | |
4560e78f | 1091 | flush_workqueue(xfs_discard_wq); |
ebf55872 | 1092 | |
e6b3bb78 CM |
1093 | /* |
1094 | * We now need to tell the world we are unmounting. This will allow | |
1095 | * us to detect that the filesystem is going away and we should error | |
1096 | * out anything that we have been retrying in the background. This will | |
1097 | * prevent neverending retries in AIL pushing from hanging the unmount. | |
1098 | */ | |
1099 | mp->m_flags |= XFS_MOUNT_UNMOUNTING; | |
1100 | ||
c854363e | 1101 | /* |
211e4d43 CH |
1102 | * Flush all pending changes from the AIL. |
1103 | */ | |
1104 | xfs_ail_push_all_sync(mp->m_ail); | |
1105 | ||
1106 | /* | |
1107 | * And reclaim all inodes. At this point there should be no dirty | |
7e18530b DC |
1108 | * inodes and none should be pinned or locked, but use synchronous |
1109 | * reclaim just to be sure. We can stop background inode reclaim | |
1110 | * here as well if it is still running. | |
c854363e | 1111 | */ |
7e18530b | 1112 | cancel_delayed_work_sync(&mp->m_reclaim_work); |
c854363e | 1113 | xfs_reclaim_inodes(mp, SYNC_WAIT); |
1da177e4 | 1114 | |
7d095257 | 1115 | xfs_qm_unmount(mp); |
a357a121 | 1116 | |
84e1e99f DC |
1117 | /* |
1118 | * Unreserve any blocks we have so that when we unmount we don't account | |
1119 | * the reserved free space as used. This is really only necessary for | |
1120 | * lazy superblock counting because it trusts the incore superblock | |
9da096fd | 1121 | * counters to be absolutely correct on clean unmount. |
84e1e99f DC |
1122 | * |
1123 | * We don't bother correcting this elsewhere for lazy superblock | |
1124 | * counting because on mount of an unclean filesystem we reconstruct the | |
1125 | * correct counter value and this is irrelevant. | |
1126 | * | |
1127 | * For non-lazy counter filesystems, this doesn't matter at all because | |
1128 | * we only every apply deltas to the superblock and hence the incore | |
1129 | * value does not matter.... | |
1130 | */ | |
1131 | resblks = 0; | |
714082bc DC |
1132 | error = xfs_reserve_blocks(mp, &resblks, NULL); |
1133 | if (error) | |
0b932ccc | 1134 | xfs_warn(mp, "Unable to free reserved block pool. " |
714082bc DC |
1135 | "Freespace may not be correct on next mount."); |
1136 | ||
adab0f67 | 1137 | error = xfs_log_sbcount(mp); |
e5720eec | 1138 | if (error) |
0b932ccc | 1139 | xfs_warn(mp, "Unable to update superblock counters. " |
e5720eec | 1140 | "Freespace may not be correct on next mount."); |
87c7bec7 | 1141 | |
225e4635 | 1142 | |
21b699c8 | 1143 | xfs_log_unmount(mp); |
0650b554 | 1144 | xfs_da_unmount(mp); |
27174203 | 1145 | xfs_uuid_unmount(mp); |
1da177e4 | 1146 | |
1550d0b0 | 1147 | #if defined(DEBUG) |
0ce4cfd4 | 1148 | xfs_errortag_clearall(mp, 0); |
1da177e4 | 1149 | #endif |
ff4f038c | 1150 | xfs_free_perag(mp); |
a31b1d3d | 1151 | |
192852be | 1152 | xfs_error_sysfs_del(mp); |
225e4635 | 1153 | xfs_sysfs_del(&mp->m_stats.xs_kobj); |
a31b1d3d | 1154 | xfs_sysfs_del(&mp->m_kobj); |
1da177e4 LT |
1155 | } |
1156 | ||
91ee575f BF |
1157 | /* |
1158 | * Determine whether modifications can proceed. The caller specifies the minimum | |
1159 | * freeze level for which modifications should not be allowed. This allows | |
1160 | * certain operations to proceed while the freeze sequence is in progress, if | |
1161 | * necessary. | |
1162 | */ | |
1163 | bool | |
1164 | xfs_fs_writable( | |
1165 | struct xfs_mount *mp, | |
1166 | int level) | |
92821e2b | 1167 | { |
91ee575f BF |
1168 | ASSERT(level > SB_UNFROZEN); |
1169 | if ((mp->m_super->s_writers.frozen >= level) || | |
1170 | XFS_FORCED_SHUTDOWN(mp) || (mp->m_flags & XFS_MOUNT_RDONLY)) | |
1171 | return false; | |
1172 | ||
1173 | return true; | |
92821e2b DC |
1174 | } |
1175 | ||
1176 | /* | |
b2ce3974 AE |
1177 | * xfs_log_sbcount |
1178 | * | |
adab0f67 | 1179 | * Sync the superblock counters to disk. |
b2ce3974 | 1180 | * |
91ee575f BF |
1181 | * Note this code can be called during the process of freezing, so we use the |
1182 | * transaction allocator that does not block when the transaction subsystem is | |
1183 | * in its frozen state. | |
92821e2b DC |
1184 | */ |
1185 | int | |
adab0f67 | 1186 | xfs_log_sbcount(xfs_mount_t *mp) |
92821e2b | 1187 | { |
91ee575f BF |
1188 | /* allow this to proceed during the freeze sequence... */ |
1189 | if (!xfs_fs_writable(mp, SB_FREEZE_COMPLETE)) | |
92821e2b DC |
1190 | return 0; |
1191 | ||
92821e2b DC |
1192 | /* |
1193 | * we don't need to do this if we are updating the superblock | |
1194 | * counters on every modification. | |
1195 | */ | |
1196 | if (!xfs_sb_version_haslazysbcount(&mp->m_sb)) | |
1197 | return 0; | |
1198 | ||
61e63ecb | 1199 | return xfs_sync_sb(mp, true); |
92821e2b DC |
1200 | } |
1201 | ||
8c1903d3 DC |
1202 | /* |
1203 | * Deltas for the inode count are +/-64, hence we use a large batch size | |
1204 | * of 128 so we don't need to take the counter lock on every update. | |
1205 | */ | |
1206 | #define XFS_ICOUNT_BATCH 128 | |
501ab323 DC |
1207 | int |
1208 | xfs_mod_icount( | |
1209 | struct xfs_mount *mp, | |
1210 | int64_t delta) | |
1211 | { | |
8c1903d3 DC |
1212 | __percpu_counter_add(&mp->m_icount, delta, XFS_ICOUNT_BATCH); |
1213 | if (__percpu_counter_compare(&mp->m_icount, 0, XFS_ICOUNT_BATCH) < 0) { | |
501ab323 DC |
1214 | ASSERT(0); |
1215 | percpu_counter_add(&mp->m_icount, -delta); | |
1216 | return -EINVAL; | |
1217 | } | |
1218 | return 0; | |
1219 | } | |
1220 | ||
e88b64ea DC |
1221 | int |
1222 | xfs_mod_ifree( | |
1223 | struct xfs_mount *mp, | |
1224 | int64_t delta) | |
1225 | { | |
1226 | percpu_counter_add(&mp->m_ifree, delta); | |
1227 | if (percpu_counter_compare(&mp->m_ifree, 0) < 0) { | |
1228 | ASSERT(0); | |
1229 | percpu_counter_add(&mp->m_ifree, -delta); | |
1230 | return -EINVAL; | |
1231 | } | |
1232 | return 0; | |
1233 | } | |
0d485ada | 1234 | |
8c1903d3 DC |
1235 | /* |
1236 | * Deltas for the block count can vary from 1 to very large, but lock contention | |
1237 | * only occurs on frequent small block count updates such as in the delayed | |
1238 | * allocation path for buffered writes (page a time updates). Hence we set | |
1239 | * a large batch count (1024) to minimise global counter updates except when | |
1240 | * we get near to ENOSPC and we have to be very accurate with our updates. | |
1241 | */ | |
1242 | #define XFS_FDBLOCKS_BATCH 1024 | |
0d485ada DC |
1243 | int |
1244 | xfs_mod_fdblocks( | |
1245 | struct xfs_mount *mp, | |
1246 | int64_t delta, | |
1247 | bool rsvd) | |
1248 | { | |
1249 | int64_t lcounter; | |
1250 | long long res_used; | |
1251 | s32 batch; | |
1252 | ||
1253 | if (delta > 0) { | |
1254 | /* | |
1255 | * If the reserve pool is depleted, put blocks back into it | |
1256 | * first. Most of the time the pool is full. | |
1257 | */ | |
1258 | if (likely(mp->m_resblks == mp->m_resblks_avail)) { | |
1259 | percpu_counter_add(&mp->m_fdblocks, delta); | |
1260 | return 0; | |
1261 | } | |
1262 | ||
1263 | spin_lock(&mp->m_sb_lock); | |
1264 | res_used = (long long)(mp->m_resblks - mp->m_resblks_avail); | |
1265 | ||
1266 | if (res_used > delta) { | |
1267 | mp->m_resblks_avail += delta; | |
1268 | } else { | |
1269 | delta -= res_used; | |
1270 | mp->m_resblks_avail = mp->m_resblks; | |
1271 | percpu_counter_add(&mp->m_fdblocks, delta); | |
1272 | } | |
1273 | spin_unlock(&mp->m_sb_lock); | |
1274 | return 0; | |
1275 | } | |
1276 | ||
1277 | /* | |
1278 | * Taking blocks away, need to be more accurate the closer we | |
1279 | * are to zero. | |
1280 | * | |
0d485ada DC |
1281 | * If the counter has a value of less than 2 * max batch size, |
1282 | * then make everything serialise as we are real close to | |
1283 | * ENOSPC. | |
1284 | */ | |
8c1903d3 DC |
1285 | if (__percpu_counter_compare(&mp->m_fdblocks, 2 * XFS_FDBLOCKS_BATCH, |
1286 | XFS_FDBLOCKS_BATCH) < 0) | |
0d485ada DC |
1287 | batch = 1; |
1288 | else | |
8c1903d3 | 1289 | batch = XFS_FDBLOCKS_BATCH; |
0d485ada DC |
1290 | |
1291 | __percpu_counter_add(&mp->m_fdblocks, delta, batch); | |
52548852 | 1292 | if (__percpu_counter_compare(&mp->m_fdblocks, mp->m_alloc_set_aside, |
8c1903d3 | 1293 | XFS_FDBLOCKS_BATCH) >= 0) { |
0d485ada DC |
1294 | /* we had space! */ |
1295 | return 0; | |
1296 | } | |
1297 | ||
1298 | /* | |
1299 | * lock up the sb for dipping into reserves before releasing the space | |
1300 | * that took us to ENOSPC. | |
1301 | */ | |
1302 | spin_lock(&mp->m_sb_lock); | |
1303 | percpu_counter_add(&mp->m_fdblocks, -delta); | |
1304 | if (!rsvd) | |
1305 | goto fdblocks_enospc; | |
1306 | ||
1307 | lcounter = (long long)mp->m_resblks_avail + delta; | |
1308 | if (lcounter >= 0) { | |
1309 | mp->m_resblks_avail = lcounter; | |
1310 | spin_unlock(&mp->m_sb_lock); | |
1311 | return 0; | |
1312 | } | |
1313 | printk_once(KERN_WARNING | |
1314 | "Filesystem \"%s\": reserve blocks depleted! " | |
1315 | "Consider increasing reserve pool size.", | |
1316 | mp->m_fsname); | |
1317 | fdblocks_enospc: | |
1318 | spin_unlock(&mp->m_sb_lock); | |
1319 | return -ENOSPC; | |
1320 | } | |
1321 | ||
bab98bbe DC |
1322 | int |
1323 | xfs_mod_frextents( | |
1324 | struct xfs_mount *mp, | |
1325 | int64_t delta) | |
1326 | { | |
1327 | int64_t lcounter; | |
1328 | int ret = 0; | |
1329 | ||
1330 | spin_lock(&mp->m_sb_lock); | |
1331 | lcounter = mp->m_sb.sb_frextents + delta; | |
1332 | if (lcounter < 0) | |
1333 | ret = -ENOSPC; | |
1334 | else | |
1335 | mp->m_sb.sb_frextents = lcounter; | |
1336 | spin_unlock(&mp->m_sb_lock); | |
1337 | return ret; | |
1338 | } | |
1339 | ||
1da177e4 LT |
1340 | /* |
1341 | * xfs_getsb() is called to obtain the buffer for the superblock. | |
1342 | * The buffer is returned locked and read in from disk. | |
1343 | * The buffer should be released with a call to xfs_brelse(). | |
1344 | * | |
1345 | * If the flags parameter is BUF_TRYLOCK, then we'll only return | |
1346 | * the superblock buffer if it can be locked without sleeping. | |
1347 | * If it can't then we'll return NULL. | |
1348 | */ | |
0c842ad4 | 1349 | struct xfs_buf * |
1da177e4 | 1350 | xfs_getsb( |
0c842ad4 CH |
1351 | struct xfs_mount *mp, |
1352 | int flags) | |
1da177e4 | 1353 | { |
0c842ad4 | 1354 | struct xfs_buf *bp = mp->m_sb_bp; |
1da177e4 | 1355 | |
0c842ad4 CH |
1356 | if (!xfs_buf_trylock(bp)) { |
1357 | if (flags & XBF_TRYLOCK) | |
1da177e4 | 1358 | return NULL; |
0c842ad4 | 1359 | xfs_buf_lock(bp); |
1da177e4 | 1360 | } |
0c842ad4 | 1361 | |
72790aa1 | 1362 | xfs_buf_hold(bp); |
b0388bf1 | 1363 | ASSERT(bp->b_flags & XBF_DONE); |
014c2544 | 1364 | return bp; |
1da177e4 LT |
1365 | } |
1366 | ||
1367 | /* | |
1368 | * Used to free the superblock along various error paths. | |
1369 | */ | |
1370 | void | |
1371 | xfs_freesb( | |
26af6552 | 1372 | struct xfs_mount *mp) |
1da177e4 | 1373 | { |
26af6552 | 1374 | struct xfs_buf *bp = mp->m_sb_bp; |
1da177e4 | 1375 | |
26af6552 | 1376 | xfs_buf_lock(bp); |
1da177e4 | 1377 | mp->m_sb_bp = NULL; |
26af6552 | 1378 | xfs_buf_relse(bp); |
1da177e4 LT |
1379 | } |
1380 | ||
dda35b8f CH |
1381 | /* |
1382 | * If the underlying (data/log/rt) device is readonly, there are some | |
1383 | * operations that cannot proceed. | |
1384 | */ | |
1385 | int | |
1386 | xfs_dev_is_read_only( | |
1387 | struct xfs_mount *mp, | |
1388 | char *message) | |
1389 | { | |
1390 | if (xfs_readonly_buftarg(mp->m_ddev_targp) || | |
1391 | xfs_readonly_buftarg(mp->m_logdev_targp) || | |
1392 | (mp->m_rtdev_targp && xfs_readonly_buftarg(mp->m_rtdev_targp))) { | |
0b932ccc DC |
1393 | xfs_notice(mp, "%s required on read-only device.", message); |
1394 | xfs_notice(mp, "write access unavailable, cannot proceed."); | |
2451337d | 1395 | return -EROFS; |
dda35b8f CH |
1396 | } |
1397 | return 0; | |
1398 | } |