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sh_eth: fix EESIPR values for SH77{34|63}
[linux/fpc-iii.git] / fs / xfs / xfs_super.c
blobeecbaac08ebaab50f7a5a139e0ae646a7c086d4d
1 /*
2 * Copyright (c) 2000-2006 Silicon Graphics, Inc.
3 * All Rights Reserved.
4 *
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
7 * published by the Free Software Foundation.
8 *
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.
13 *
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
17 */
18
19 #include "xfs.h"
20 #include "xfs_shared.h"
21 #include "xfs_format.h"
22 #include "xfs_log_format.h"
23 #include "xfs_trans_resv.h"
24 #include "xfs_sb.h"
25 #include "xfs_mount.h"
26 #include "xfs_da_format.h"
27 #include "xfs_inode.h"
28 #include "xfs_btree.h"
29 #include "xfs_bmap.h"
30 #include "xfs_alloc.h"
31 #include "xfs_error.h"
32 #include "xfs_fsops.h"
33 #include "xfs_trans.h"
34 #include "xfs_buf_item.h"
35 #include "xfs_log.h"
36 #include "xfs_log_priv.h"
37 #include "xfs_da_btree.h"
38 #include "xfs_dir2.h"
39 #include "xfs_extfree_item.h"
40 #include "xfs_mru_cache.h"
41 #include "xfs_inode_item.h"
42 #include "xfs_icache.h"
43 #include "xfs_trace.h"
44 #include "xfs_icreate_item.h"
45 #include "xfs_filestream.h"
46 #include "xfs_quota.h"
47 #include "xfs_sysfs.h"
48 #include "xfs_ondisk.h"
49 #include "xfs_rmap_item.h"
50 #include "xfs_refcount_item.h"
51 #include "xfs_bmap_item.h"
52 #include "xfs_reflink.h"
53
54 #include <linux/namei.h>
55 #include <linux/init.h>
56 #include <linux/slab.h>
57 #include <linux/mount.h>
58 #include <linux/mempool.h>
59 #include <linux/writeback.h>
60 #include <linux/kthread.h>
61 #include <linux/freezer.h>
62 #include <linux/parser.h>
63
64 static const struct super_operations xfs_super_operations;
65 struct bio_set *xfs_ioend_bioset;
66
67 static struct kset *xfs_kset; /* top-level xfs sysfs dir */
68 #ifdef DEBUG
69 static struct xfs_kobj xfs_dbg_kobj; /* global debug sysfs attrs */
70 #endif
71
72 /*
73 * Table driven mount option parser.
74 */
75 enum {
76 Opt_logbufs, Opt_logbsize, Opt_logdev, Opt_rtdev, Opt_biosize,
77 Opt_wsync, Opt_noalign, Opt_swalloc, Opt_sunit, Opt_swidth, Opt_nouuid,
78 Opt_mtpt, Opt_grpid, Opt_nogrpid, Opt_bsdgroups, Opt_sysvgroups,
79 Opt_allocsize, Opt_norecovery, Opt_barrier, Opt_nobarrier,
80 Opt_inode64, Opt_inode32, Opt_ikeep, Opt_noikeep,
81 Opt_largeio, Opt_nolargeio, Opt_attr2, Opt_noattr2, Opt_filestreams,
82 Opt_quota, Opt_noquota, Opt_usrquota, Opt_grpquota, Opt_prjquota,
83 Opt_uquota, Opt_gquota, Opt_pquota,
84 Opt_uqnoenforce, Opt_gqnoenforce, Opt_pqnoenforce, Opt_qnoenforce,
85 Opt_discard, Opt_nodiscard, Opt_dax, Opt_err,
86 };
87
88 static const match_table_t tokens = {
89 {Opt_logbufs, "logbufs=%u"}, /* number of XFS log buffers */
90 {Opt_logbsize, "logbsize=%s"}, /* size of XFS log buffers */
91 {Opt_logdev, "logdev=%s"}, /* log device */
92 {Opt_rtdev, "rtdev=%s"}, /* realtime I/O device */
93 {Opt_biosize, "biosize=%u"}, /* log2 of preferred buffered io size */
94 {Opt_wsync, "wsync"}, /* safe-mode nfs compatible mount */
95 {Opt_noalign, "noalign"}, /* turn off stripe alignment */
96 {Opt_swalloc, "swalloc"}, /* turn on stripe width allocation */
97 {Opt_sunit, "sunit=%u"}, /* data volume stripe unit */
98 {Opt_swidth, "swidth=%u"}, /* data volume stripe width */
99 {Opt_nouuid, "nouuid"}, /* ignore filesystem UUID */
100 {Opt_mtpt, "mtpt"}, /* filesystem mount point */
101 {Opt_grpid, "grpid"}, /* group-ID from parent directory */
102 {Opt_nogrpid, "nogrpid"}, /* group-ID from current process */
103 {Opt_bsdgroups, "bsdgroups"}, /* group-ID from parent directory */
104 {Opt_sysvgroups,"sysvgroups"}, /* group-ID from current process */
105 {Opt_allocsize, "allocsize=%s"},/* preferred allocation size */
106 {Opt_norecovery,"norecovery"}, /* don't run XFS recovery */
107 {Opt_inode64, "inode64"}, /* inodes can be allocated anywhere */
108 {Opt_inode32, "inode32"}, /* inode allocation limited to
109 * XFS_MAXINUMBER_32 */
110 {Opt_ikeep, "ikeep"}, /* do not free empty inode clusters */
111 {Opt_noikeep, "noikeep"}, /* free empty inode clusters */
112 {Opt_largeio, "largeio"}, /* report large I/O sizes in stat() */
113 {Opt_nolargeio, "nolargeio"}, /* do not report large I/O sizes
114 * in stat(). */
115 {Opt_attr2, "attr2"}, /* do use attr2 attribute format */
116 {Opt_noattr2, "noattr2"}, /* do not use attr2 attribute format */
117 {Opt_filestreams,"filestreams"},/* use filestreams allocator */
118 {Opt_quota, "quota"}, /* disk quotas (user) */
119 {Opt_noquota, "noquota"}, /* no quotas */
120 {Opt_usrquota, "usrquota"}, /* user quota enabled */
121 {Opt_grpquota, "grpquota"}, /* group quota enabled */
122 {Opt_prjquota, "prjquota"}, /* project quota enabled */
123 {Opt_uquota, "uquota"}, /* user quota (IRIX variant) */
124 {Opt_gquota, "gquota"}, /* group quota (IRIX variant) */
125 {Opt_pquota, "pquota"}, /* project quota (IRIX variant) */
126 {Opt_uqnoenforce,"uqnoenforce"},/* user quota limit enforcement */
127 {Opt_gqnoenforce,"gqnoenforce"},/* group quota limit enforcement */
128 {Opt_pqnoenforce,"pqnoenforce"},/* project quota limit enforcement */
129 {Opt_qnoenforce, "qnoenforce"}, /* same as uqnoenforce */
130 {Opt_discard, "discard"}, /* Discard unused blocks */
131 {Opt_nodiscard, "nodiscard"}, /* Do not discard unused blocks */
132
133 {Opt_dax, "dax"}, /* Enable direct access to bdev pages */
134
135 /* Deprecated mount options scheduled for removal */
136 {Opt_barrier, "barrier"}, /* use writer barriers for log write and
137 * unwritten extent conversion */
138 {Opt_nobarrier, "nobarrier"}, /* .. disable */
139
140 {Opt_err, NULL},
141 };
142
143
144 STATIC int
145 suffix_kstrtoint(const substring_t *s, unsigned int base, int *res)
146 {
147 int last, shift_left_factor = 0, _res;
148 char *value;
149 int ret = 0;
150
151 value = match_strdup(s);
152 if (!value)
153 return -ENOMEM;
154
155 last = strlen(value) - 1;
156 if (value[last] == 'K' || value[last] == 'k') {
157 shift_left_factor = 10;
158 value[last] = '\0';
159 }
160 if (value[last] == 'M' || value[last] == 'm') {
161 shift_left_factor = 20;
162 value[last] = '\0';
163 }
164 if (value[last] == 'G' || value[last] == 'g') {
165 shift_left_factor = 30;
166 value[last] = '\0';
167 }
168
169 if (kstrtoint(value, base, &_res))
170 ret = -EINVAL;
171 kfree(value);
172 *res = _res << shift_left_factor;
173 return ret;
174 }
175
176 /*
177 * This function fills in xfs_mount_t fields based on mount args.
178 * Note: the superblock has _not_ yet been read in.
179 *
180 * Note that this function leaks the various device name allocations on
181 * failure. The caller takes care of them.
182 *
183 * *sb is const because this is also used to test options on the remount
184 * path, and we don't want this to have any side effects at remount time.
185 * Today this function does not change *sb, but just to future-proof...
186 */
187 STATIC int
188 xfs_parseargs(
189 struct xfs_mount *mp,
190 char *options)
191 {
192 const struct super_block *sb = mp->m_super;
193 char *p;
194 substring_t args[MAX_OPT_ARGS];
195 int dsunit = 0;
196 int dswidth = 0;
197 int iosize = 0;
198 __uint8_t iosizelog = 0;
199
200 /*
201 * set up the mount name first so all the errors will refer to the
202 * correct device.
203 */
204 mp->m_fsname = kstrndup(sb->s_id, MAXNAMELEN, GFP_KERNEL);
205 if (!mp->m_fsname)
206 return -ENOMEM;
207 mp->m_fsname_len = strlen(mp->m_fsname) + 1;
208
209 /*
210 * Copy binary VFS mount flags we are interested in.
211 */
212 if (sb->s_flags & MS_RDONLY)
213 mp->m_flags |= XFS_MOUNT_RDONLY;
214 if (sb->s_flags & MS_DIRSYNC)
215 mp->m_flags |= XFS_MOUNT_DIRSYNC;
216 if (sb->s_flags & MS_SYNCHRONOUS)
217 mp->m_flags |= XFS_MOUNT_WSYNC;
218
219 /*
220 * Set some default flags that could be cleared by the mount option
221 * parsing.
222 */
223 mp->m_flags |= XFS_MOUNT_BARRIER;
224 mp->m_flags |= XFS_MOUNT_COMPAT_IOSIZE;
225
226 /*
227 * These can be overridden by the mount option parsing.
228 */
229 mp->m_logbufs = -1;
230 mp->m_logbsize = -1;
231
232 if (!options)
233 goto done;
234
235 while ((p = strsep(&options, ",")) != NULL) {
236 int token;
237
238 if (!*p)
239 continue;
240
241 token = match_token(p, tokens, args);
242 switch (token) {
243 case Opt_logbufs:
244 if (match_int(args, &mp->m_logbufs))
245 return -EINVAL;
246 break;
247 case Opt_logbsize:
248 if (suffix_kstrtoint(args, 10, &mp->m_logbsize))
249 return -EINVAL;
250 break;
251 case Opt_logdev:
252 mp->m_logname = match_strdup(args);
253 if (!mp->m_logname)
254 return -ENOMEM;
255 break;
256 case Opt_mtpt:
257 xfs_warn(mp, "%s option not allowed on this system", p);
258 return -EINVAL;
259 case Opt_rtdev:
260 mp->m_rtname = match_strdup(args);
261 if (!mp->m_rtname)
262 return -ENOMEM;
263 break;
264 case Opt_allocsize:
265 case Opt_biosize:
266 if (suffix_kstrtoint(args, 10, &iosize))
267 return -EINVAL;
268 iosizelog = ffs(iosize) - 1;
269 break;
270 case Opt_grpid:
271 case Opt_bsdgroups:
272 mp->m_flags |= XFS_MOUNT_GRPID;
273 break;
274 case Opt_nogrpid:
275 case Opt_sysvgroups:
276 mp->m_flags &= ~XFS_MOUNT_GRPID;
277 break;
278 case Opt_wsync:
279 mp->m_flags |= XFS_MOUNT_WSYNC;
280 break;
281 case Opt_norecovery:
282 mp->m_flags |= XFS_MOUNT_NORECOVERY;
283 break;
284 case Opt_noalign:
285 mp->m_flags |= XFS_MOUNT_NOALIGN;
286 break;
287 case Opt_swalloc:
288 mp->m_flags |= XFS_MOUNT_SWALLOC;
289 break;
290 case Opt_sunit:
291 if (match_int(args, &dsunit))
292 return -EINVAL;
293 break;
294 case Opt_swidth:
295 if (match_int(args, &dswidth))
296 return -EINVAL;
297 break;
298 case Opt_inode32:
299 mp->m_flags |= XFS_MOUNT_SMALL_INUMS;
300 break;
301 case Opt_inode64:
302 mp->m_flags &= ~XFS_MOUNT_SMALL_INUMS;
303 break;
304 case Opt_nouuid:
305 mp->m_flags |= XFS_MOUNT_NOUUID;
306 break;
307 case Opt_ikeep:
308 mp->m_flags |= XFS_MOUNT_IKEEP;
309 break;
310 case Opt_noikeep:
311 mp->m_flags &= ~XFS_MOUNT_IKEEP;
312 break;
313 case Opt_largeio:
314 mp->m_flags &= ~XFS_MOUNT_COMPAT_IOSIZE;
315 break;
316 case Opt_nolargeio:
317 mp->m_flags |= XFS_MOUNT_COMPAT_IOSIZE;
318 break;
319 case Opt_attr2:
320 mp->m_flags |= XFS_MOUNT_ATTR2;
321 break;
322 case Opt_noattr2:
323 mp->m_flags &= ~XFS_MOUNT_ATTR2;
324 mp->m_flags |= XFS_MOUNT_NOATTR2;
325 break;
326 case Opt_filestreams:
327 mp->m_flags |= XFS_MOUNT_FILESTREAMS;
328 break;
329 case Opt_noquota:
330 mp->m_qflags &= ~XFS_ALL_QUOTA_ACCT;
331 mp->m_qflags &= ~XFS_ALL_QUOTA_ENFD;
332 mp->m_qflags &= ~XFS_ALL_QUOTA_ACTIVE;
333 break;
334 case Opt_quota:
335 case Opt_uquota:
336 case Opt_usrquota:
337 mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE |
338 XFS_UQUOTA_ENFD);
339 break;
340 case Opt_qnoenforce:
341 case Opt_uqnoenforce:
342 mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE);
343 mp->m_qflags &= ~XFS_UQUOTA_ENFD;
344 break;
345 case Opt_pquota:
346 case Opt_prjquota:
347 mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE |
348 XFS_PQUOTA_ENFD);
349 break;
350 case Opt_pqnoenforce:
351 mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE);
352 mp->m_qflags &= ~XFS_PQUOTA_ENFD;
353 break;
354 case Opt_gquota:
355 case Opt_grpquota:
356 mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE |
357 XFS_GQUOTA_ENFD);
358 break;
359 case Opt_gqnoenforce:
360 mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE);
361 mp->m_qflags &= ~XFS_GQUOTA_ENFD;
362 break;
363 case Opt_discard:
364 mp->m_flags |= XFS_MOUNT_DISCARD;
365 break;
366 case Opt_nodiscard:
367 mp->m_flags &= ~XFS_MOUNT_DISCARD;
368 break;
369 #ifdef CONFIG_FS_DAX
370 case Opt_dax:
371 mp->m_flags |= XFS_MOUNT_DAX;
372 break;
373 #endif
374 case Opt_barrier:
375 xfs_warn(mp, "%s option is deprecated, ignoring.", p);
376 mp->m_flags |= XFS_MOUNT_BARRIER;
377 break;
378 case Opt_nobarrier:
379 xfs_warn(mp, "%s option is deprecated, ignoring.", p);
380 mp->m_flags &= ~XFS_MOUNT_BARRIER;
381 break;
382 default:
383 xfs_warn(mp, "unknown mount option [%s].", p);
384 return -EINVAL;
385 }
386 }
387
388 /*
389 * no recovery flag requires a read-only mount
390 */
391 if ((mp->m_flags & XFS_MOUNT_NORECOVERY) &&
392 !(mp->m_flags & XFS_MOUNT_RDONLY)) {
393 xfs_warn(mp, "no-recovery mounts must be read-only.");
394 return -EINVAL;
395 }
396
397 if ((mp->m_flags & XFS_MOUNT_NOALIGN) && (dsunit || dswidth)) {
398 xfs_warn(mp,
399 "sunit and swidth options incompatible with the noalign option");
400 return -EINVAL;
401 }
402
403 #ifndef CONFIG_XFS_QUOTA
404 if (XFS_IS_QUOTA_RUNNING(mp)) {
405 xfs_warn(mp, "quota support not available in this kernel.");
406 return -EINVAL;
407 }
408 #endif
409
410 if ((dsunit && !dswidth) || (!dsunit && dswidth)) {
411 xfs_warn(mp, "sunit and swidth must be specified together");
412 return -EINVAL;
413 }
414
415 if (dsunit && (dswidth % dsunit != 0)) {
416 xfs_warn(mp,
417 "stripe width (%d) must be a multiple of the stripe unit (%d)",
418 dswidth, dsunit);
419 return -EINVAL;
420 }
421
422 done:
423 if (dsunit && !(mp->m_flags & XFS_MOUNT_NOALIGN)) {
424 /*
425 * At this point the superblock has not been read
426 * in, therefore we do not know the block size.
427 * Before the mount call ends we will convert
428 * these to FSBs.
429 */
430 mp->m_dalign = dsunit;
431 mp->m_swidth = dswidth;
432 }
433
434 if (mp->m_logbufs != -1 &&
435 mp->m_logbufs != 0 &&
436 (mp->m_logbufs < XLOG_MIN_ICLOGS ||
437 mp->m_logbufs > XLOG_MAX_ICLOGS)) {
438 xfs_warn(mp, "invalid logbufs value: %d [not %d-%d]",
439 mp->m_logbufs, XLOG_MIN_ICLOGS, XLOG_MAX_ICLOGS);
440 return -EINVAL;
441 }
442 if (mp->m_logbsize != -1 &&
443 mp->m_logbsize != 0 &&
444 (mp->m_logbsize < XLOG_MIN_RECORD_BSIZE ||
445 mp->m_logbsize > XLOG_MAX_RECORD_BSIZE ||
446 !is_power_of_2(mp->m_logbsize))) {
447 xfs_warn(mp,
448 "invalid logbufsize: %d [not 16k,32k,64k,128k or 256k]",
449 mp->m_logbsize);
450 return -EINVAL;
451 }
452
453 if (iosizelog) {
454 if (iosizelog > XFS_MAX_IO_LOG ||
455 iosizelog < XFS_MIN_IO_LOG) {
456 xfs_warn(mp, "invalid log iosize: %d [not %d-%d]",
457 iosizelog, XFS_MIN_IO_LOG,
458 XFS_MAX_IO_LOG);
459 return -EINVAL;
460 }
461
462 mp->m_flags |= XFS_MOUNT_DFLT_IOSIZE;
463 mp->m_readio_log = iosizelog;
464 mp->m_writeio_log = iosizelog;
465 }
466
467 return 0;
468 }
469
470 struct proc_xfs_info {
471 uint64_t flag;
472 char *str;
473 };
474
475 STATIC int
476 xfs_showargs(
477 struct xfs_mount *mp,
478 struct seq_file *m)
479 {
480 static struct proc_xfs_info xfs_info_set[] = {
481 /* the few simple ones we can get from the mount struct */
482 { XFS_MOUNT_IKEEP, ",ikeep" },
483 { XFS_MOUNT_WSYNC, ",wsync" },
484 { XFS_MOUNT_NOALIGN, ",noalign" },
485 { XFS_MOUNT_SWALLOC, ",swalloc" },
486 { XFS_MOUNT_NOUUID, ",nouuid" },
487 { XFS_MOUNT_NORECOVERY, ",norecovery" },
488 { XFS_MOUNT_ATTR2, ",attr2" },
489 { XFS_MOUNT_FILESTREAMS, ",filestreams" },
490 { XFS_MOUNT_GRPID, ",grpid" },
491 { XFS_MOUNT_DISCARD, ",discard" },
492 { XFS_MOUNT_SMALL_INUMS, ",inode32" },
493 { XFS_MOUNT_DAX, ",dax" },
494 { 0, NULL }
495 };
496 static struct proc_xfs_info xfs_info_unset[] = {
497 /* the few simple ones we can get from the mount struct */
498 { XFS_MOUNT_COMPAT_IOSIZE, ",largeio" },
499 { XFS_MOUNT_BARRIER, ",nobarrier" },
500 { XFS_MOUNT_SMALL_INUMS, ",inode64" },
501 { 0, NULL }
502 };
503 struct proc_xfs_info *xfs_infop;
504
505 for (xfs_infop = xfs_info_set; xfs_infop->flag; xfs_infop++) {
506 if (mp->m_flags & xfs_infop->flag)
507 seq_puts(m, xfs_infop->str);
508 }
509 for (xfs_infop = xfs_info_unset; xfs_infop->flag; xfs_infop++) {
510 if (!(mp->m_flags & xfs_infop->flag))
511 seq_puts(m, xfs_infop->str);
512 }
513
514 if (mp->m_flags & XFS_MOUNT_DFLT_IOSIZE)
515 seq_printf(m, ",allocsize=%dk",
516 (int)(1 << mp->m_writeio_log) >> 10);
517
518 if (mp->m_logbufs > 0)
519 seq_printf(m, ",logbufs=%d", mp->m_logbufs);
520 if (mp->m_logbsize > 0)
521 seq_printf(m, ",logbsize=%dk", mp->m_logbsize >> 10);
522
523 if (mp->m_logname)
524 seq_show_option(m, "logdev", mp->m_logname);
525 if (mp->m_rtname)
526 seq_show_option(m, "rtdev", mp->m_rtname);
527
528 if (mp->m_dalign > 0)
529 seq_printf(m, ",sunit=%d",
530 (int)XFS_FSB_TO_BB(mp, mp->m_dalign));
531 if (mp->m_swidth > 0)
532 seq_printf(m, ",swidth=%d",
533 (int)XFS_FSB_TO_BB(mp, mp->m_swidth));
534
535 if (mp->m_qflags & (XFS_UQUOTA_ACCT|XFS_UQUOTA_ENFD))
536 seq_puts(m, ",usrquota");
537 else if (mp->m_qflags & XFS_UQUOTA_ACCT)
538 seq_puts(m, ",uqnoenforce");
539
540 if (mp->m_qflags & XFS_PQUOTA_ACCT) {
541 if (mp->m_qflags & XFS_PQUOTA_ENFD)
542 seq_puts(m, ",prjquota");
543 else
544 seq_puts(m, ",pqnoenforce");
545 }
546 if (mp->m_qflags & XFS_GQUOTA_ACCT) {
547 if (mp->m_qflags & XFS_GQUOTA_ENFD)
548 seq_puts(m, ",grpquota");
549 else
550 seq_puts(m, ",gqnoenforce");
551 }
552
553 if (!(mp->m_qflags & XFS_ALL_QUOTA_ACCT))
554 seq_puts(m, ",noquota");
555
556 return 0;
557 }
558 static __uint64_t
559 xfs_max_file_offset(
560 unsigned int blockshift)
561 {
562 unsigned int pagefactor = 1;
563 unsigned int bitshift = BITS_PER_LONG - 1;
564
565 /* Figure out maximum filesize, on Linux this can depend on
566 * the filesystem blocksize (on 32 bit platforms).
567 * __block_write_begin does this in an [unsigned] long...
568 * page->index << (PAGE_SHIFT - bbits)
569 * So, for page sized blocks (4K on 32 bit platforms),
570 * this wraps at around 8Tb (hence MAX_LFS_FILESIZE which is
571 * (((u64)PAGE_SIZE << (BITS_PER_LONG-1))-1)
572 * but for smaller blocksizes it is less (bbits = log2 bsize).
573 * Note1: get_block_t takes a long (implicit cast from above)
574 * Note2: The Large Block Device (LBD and HAVE_SECTOR_T) patch
575 * can optionally convert the [unsigned] long from above into
576 * an [unsigned] long long.
577 */
578
579 #if BITS_PER_LONG == 32
580 # if defined(CONFIG_LBDAF)
581 ASSERT(sizeof(sector_t) == 8);
582 pagefactor = PAGE_SIZE;
583 bitshift = BITS_PER_LONG;
584 # else
585 pagefactor = PAGE_SIZE >> (PAGE_SHIFT - blockshift);
586 # endif
587 #endif
588
589 return (((__uint64_t)pagefactor) << bitshift) - 1;
590 }
591
592 /*
593 * Set parameters for inode allocation heuristics, taking into account
594 * filesystem size and inode32/inode64 mount options; i.e. specifically
595 * whether or not XFS_MOUNT_SMALL_INUMS is set.
596 *
597 * Inode allocation patterns are altered only if inode32 is requested
598 * (XFS_MOUNT_SMALL_INUMS), and the filesystem is sufficiently large.
599 * If altered, XFS_MOUNT_32BITINODES is set as well.
600 *
601 * An agcount independent of that in the mount structure is provided
602 * because in the growfs case, mp->m_sb.sb_agcount is not yet updated
603 * to the potentially higher ag count.
604 *
605 * Returns the maximum AG index which may contain inodes.
606 */
607 xfs_agnumber_t
608 xfs_set_inode_alloc(
609 struct xfs_mount *mp,
610 xfs_agnumber_t agcount)
611 {
612 xfs_agnumber_t index;
613 xfs_agnumber_t maxagi = 0;
614 xfs_sb_t *sbp = &mp->m_sb;
615 xfs_agnumber_t max_metadata;
616 xfs_agino_t agino;
617 xfs_ino_t ino;
618
619 /*
620 * Calculate how much should be reserved for inodes to meet
621 * the max inode percentage. Used only for inode32.
622 */
623 if (mp->m_maxicount) {
624 __uint64_t icount;
625
626 icount = sbp->sb_dblocks * sbp->sb_imax_pct;
627 do_div(icount, 100);
628 icount += sbp->sb_agblocks - 1;
629 do_div(icount, sbp->sb_agblocks);
630 max_metadata = icount;
631 } else {
632 max_metadata = agcount;
633 }
634
635 /* Get the last possible inode in the filesystem */
636 agino = XFS_OFFBNO_TO_AGINO(mp, sbp->sb_agblocks - 1, 0);
637 ino = XFS_AGINO_TO_INO(mp, agcount - 1, agino);
638
639 /*
640 * If user asked for no more than 32-bit inodes, and the fs is
641 * sufficiently large, set XFS_MOUNT_32BITINODES if we must alter
642 * the allocator to accommodate the request.
643 */
644 if ((mp->m_flags & XFS_MOUNT_SMALL_INUMS) && ino > XFS_MAXINUMBER_32)
645 mp->m_flags |= XFS_MOUNT_32BITINODES;
646 else
647 mp->m_flags &= ~XFS_MOUNT_32BITINODES;
648
649 for (index = 0; index < agcount; index++) {
650 struct xfs_perag *pag;
651
652 ino = XFS_AGINO_TO_INO(mp, index, agino);
653
654 pag = xfs_perag_get(mp, index);
655
656 if (mp->m_flags & XFS_MOUNT_32BITINODES) {
657 if (ino > XFS_MAXINUMBER_32) {
658 pag->pagi_inodeok = 0;
659 pag->pagf_metadata = 0;
660 } else {
661 pag->pagi_inodeok = 1;
662 maxagi++;
663 if (index < max_metadata)
664 pag->pagf_metadata = 1;
665 else
666 pag->pagf_metadata = 0;
667 }
668 } else {
669 pag->pagi_inodeok = 1;
670 pag->pagf_metadata = 0;
671 }
672
673 xfs_perag_put(pag);
674 }
675
676 return (mp->m_flags & XFS_MOUNT_32BITINODES) ? maxagi : agcount;
677 }
678
679 STATIC int
680 xfs_blkdev_get(
681 xfs_mount_t *mp,
682 const char *name,
683 struct block_device **bdevp)
684 {
685 int error = 0;
686
687 *bdevp = blkdev_get_by_path(name, FMODE_READ|FMODE_WRITE|FMODE_EXCL,
688 mp);
689 if (IS_ERR(*bdevp)) {
690 error = PTR_ERR(*bdevp);
691 xfs_warn(mp, "Invalid device [%s], error=%d", name, error);
692 }
693
694 return error;
695 }
696
697 STATIC void
698 xfs_blkdev_put(
699 struct block_device *bdev)
700 {
701 if (bdev)
702 blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL);
703 }
704
705 void
706 xfs_blkdev_issue_flush(
707 xfs_buftarg_t *buftarg)
708 {
709 blkdev_issue_flush(buftarg->bt_bdev, GFP_NOFS, NULL);
710 }
711
712 STATIC void
713 xfs_close_devices(
714 struct xfs_mount *mp)
715 {
716 if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp) {
717 struct block_device *logdev = mp->m_logdev_targp->bt_bdev;
718 xfs_free_buftarg(mp, mp->m_logdev_targp);
719 xfs_blkdev_put(logdev);
720 }
721 if (mp->m_rtdev_targp) {
722 struct block_device *rtdev = mp->m_rtdev_targp->bt_bdev;
723 xfs_free_buftarg(mp, mp->m_rtdev_targp);
724 xfs_blkdev_put(rtdev);
725 }
726 xfs_free_buftarg(mp, mp->m_ddev_targp);
727 }
728
729 /*
730 * The file system configurations are:
731 * (1) device (partition) with data and internal log
732 * (2) logical volume with data and log subvolumes.
733 * (3) logical volume with data, log, and realtime subvolumes.
734 *
735 * We only have to handle opening the log and realtime volumes here if
736 * they are present. The data subvolume has already been opened by
737 * get_sb_bdev() and is stored in sb->s_bdev.
738 */
739 STATIC int
740 xfs_open_devices(
741 struct xfs_mount *mp)
742 {
743 struct block_device *ddev = mp->m_super->s_bdev;
744 struct block_device *logdev = NULL, *rtdev = NULL;
745 int error;
746
747 /*
748 * Open real time and log devices - order is important.
749 */
750 if (mp->m_logname) {
751 error = xfs_blkdev_get(mp, mp->m_logname, &logdev);
752 if (error)
753 goto out;
754 }
755
756 if (mp->m_rtname) {
757 error = xfs_blkdev_get(mp, mp->m_rtname, &rtdev);
758 if (error)
759 goto out_close_logdev;
760
761 if (rtdev == ddev || rtdev == logdev) {
762 xfs_warn(mp,
763 "Cannot mount filesystem with identical rtdev and ddev/logdev.");
764 error = -EINVAL;
765 goto out_close_rtdev;
766 }
767 }
768
769 /*
770 * Setup xfs_mount buffer target pointers
771 */
772 error = -ENOMEM;
773 mp->m_ddev_targp = xfs_alloc_buftarg(mp, ddev);
774 if (!mp->m_ddev_targp)
775 goto out_close_rtdev;
776
777 if (rtdev) {
778 mp->m_rtdev_targp = xfs_alloc_buftarg(mp, rtdev);
779 if (!mp->m_rtdev_targp)
780 goto out_free_ddev_targ;
781 }
782
783 if (logdev && logdev != ddev) {
784 mp->m_logdev_targp = xfs_alloc_buftarg(mp, logdev);
785 if (!mp->m_logdev_targp)
786 goto out_free_rtdev_targ;
787 } else {
788 mp->m_logdev_targp = mp->m_ddev_targp;
789 }
790
791 return 0;
792
793 out_free_rtdev_targ:
794 if (mp->m_rtdev_targp)
795 xfs_free_buftarg(mp, mp->m_rtdev_targp);
796 out_free_ddev_targ:
797 xfs_free_buftarg(mp, mp->m_ddev_targp);
798 out_close_rtdev:
799 xfs_blkdev_put(rtdev);
800 out_close_logdev:
801 if (logdev && logdev != ddev)
802 xfs_blkdev_put(logdev);
803 out:
804 return error;
805 }
806
807 /*
808 * Setup xfs_mount buffer target pointers based on superblock
809 */
810 STATIC int
811 xfs_setup_devices(
812 struct xfs_mount *mp)
813 {
814 int error;
815
816 error = xfs_setsize_buftarg(mp->m_ddev_targp, mp->m_sb.sb_sectsize);
817 if (error)
818 return error;
819
820 if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp) {
821 unsigned int log_sector_size = BBSIZE;
822
823 if (xfs_sb_version_hassector(&mp->m_sb))
824 log_sector_size = mp->m_sb.sb_logsectsize;
825 error = xfs_setsize_buftarg(mp->m_logdev_targp,
826 log_sector_size);
827 if (error)
828 return error;
829 }
830 if (mp->m_rtdev_targp) {
831 error = xfs_setsize_buftarg(mp->m_rtdev_targp,
832 mp->m_sb.sb_sectsize);
833 if (error)
834 return error;
835 }
836
837 return 0;
838 }
839
840 STATIC int
841 xfs_init_mount_workqueues(
842 struct xfs_mount *mp)
843 {
844 mp->m_buf_workqueue = alloc_workqueue("xfs-buf/%s",
845 WQ_MEM_RECLAIM|WQ_FREEZABLE, 1, mp->m_fsname);
846 if (!mp->m_buf_workqueue)
847 goto out;
848
849 mp->m_data_workqueue = alloc_workqueue("xfs-data/%s",
850 WQ_MEM_RECLAIM|WQ_FREEZABLE, 0, mp->m_fsname);
851 if (!mp->m_data_workqueue)
852 goto out_destroy_buf;
853
854 mp->m_unwritten_workqueue = alloc_workqueue("xfs-conv/%s",
855 WQ_MEM_RECLAIM|WQ_FREEZABLE, 0, mp->m_fsname);
856 if (!mp->m_unwritten_workqueue)
857 goto out_destroy_data_iodone_queue;
858
859 mp->m_cil_workqueue = alloc_workqueue("xfs-cil/%s",
860 WQ_MEM_RECLAIM|WQ_FREEZABLE, 0, mp->m_fsname);
861 if (!mp->m_cil_workqueue)
862 goto out_destroy_unwritten;
863
864 mp->m_reclaim_workqueue = alloc_workqueue("xfs-reclaim/%s",
865 WQ_MEM_RECLAIM|WQ_FREEZABLE, 0, mp->m_fsname);
866 if (!mp->m_reclaim_workqueue)
867 goto out_destroy_cil;
868
869 mp->m_log_workqueue = alloc_workqueue("xfs-log/%s",
870 WQ_MEM_RECLAIM|WQ_FREEZABLE|WQ_HIGHPRI, 0,
871 mp->m_fsname);
872 if (!mp->m_log_workqueue)
873 goto out_destroy_reclaim;
874
875 mp->m_eofblocks_workqueue = alloc_workqueue("xfs-eofblocks/%s",
876 WQ_MEM_RECLAIM|WQ_FREEZABLE, 0, mp->m_fsname);
877 if (!mp->m_eofblocks_workqueue)
878 goto out_destroy_log;
879
880 return 0;
881
882 out_destroy_log:
883 destroy_workqueue(mp->m_log_workqueue);
884 out_destroy_reclaim:
885 destroy_workqueue(mp->m_reclaim_workqueue);
886 out_destroy_cil:
887 destroy_workqueue(mp->m_cil_workqueue);
888 out_destroy_unwritten:
889 destroy_workqueue(mp->m_unwritten_workqueue);
890 out_destroy_data_iodone_queue:
891 destroy_workqueue(mp->m_data_workqueue);
892 out_destroy_buf:
893 destroy_workqueue(mp->m_buf_workqueue);
894 out:
895 return -ENOMEM;
896 }
897
898 STATIC void
899 xfs_destroy_mount_workqueues(
900 struct xfs_mount *mp)
901 {
902 destroy_workqueue(mp->m_eofblocks_workqueue);
903 destroy_workqueue(mp->m_log_workqueue);
904 destroy_workqueue(mp->m_reclaim_workqueue);
905 destroy_workqueue(mp->m_cil_workqueue);
906 destroy_workqueue(mp->m_data_workqueue);
907 destroy_workqueue(mp->m_unwritten_workqueue);
908 destroy_workqueue(mp->m_buf_workqueue);
909 }
910
911 /*
912 * Flush all dirty data to disk. Must not be called while holding an XFS_ILOCK
913 * or a page lock. We use sync_inodes_sb() here to ensure we block while waiting
914 * for IO to complete so that we effectively throttle multiple callers to the
915 * rate at which IO is completing.
916 */
917 void
918 xfs_flush_inodes(
919 struct xfs_mount *mp)
920 {
921 struct super_block *sb = mp->m_super;
922
923 if (down_read_trylock(&sb->s_umount)) {
924 sync_inodes_sb(sb);
925 up_read(&sb->s_umount);
926 }
927 }
928
929 /* Catch misguided souls that try to use this interface on XFS */
930 STATIC struct inode *
931 xfs_fs_alloc_inode(
932 struct super_block *sb)
933 {
934 BUG();
935 return NULL;
936 }
937
938 /*
939 * Now that the generic code is guaranteed not to be accessing
940 * the linux inode, we can inactivate and reclaim the inode.
941 */
942 STATIC void
943 xfs_fs_destroy_inode(
944 struct inode *inode)
945 {
946 struct xfs_inode *ip = XFS_I(inode);
947 int error;
948
949 trace_xfs_destroy_inode(ip);
950
951 ASSERT(!rwsem_is_locked(&inode->i_rwsem));
952 XFS_STATS_INC(ip->i_mount, vn_rele);
953 XFS_STATS_INC(ip->i_mount, vn_remove);
954
955 if (xfs_is_reflink_inode(ip)) {
956 error = xfs_reflink_cancel_cow_range(ip, 0, NULLFILEOFF);
957 if (error && !XFS_FORCED_SHUTDOWN(ip->i_mount))
958 xfs_warn(ip->i_mount,
959 "Error %d while evicting CoW blocks for inode %llu.",
960 error, ip->i_ino);
961 }
962
963 xfs_inactive(ip);
964
965 ASSERT(XFS_FORCED_SHUTDOWN(ip->i_mount) || ip->i_delayed_blks == 0);
966 XFS_STATS_INC(ip->i_mount, vn_reclaim);
967
968 /*
969 * We should never get here with one of the reclaim flags already set.
970 */
971 ASSERT_ALWAYS(!xfs_iflags_test(ip, XFS_IRECLAIMABLE));
972 ASSERT_ALWAYS(!xfs_iflags_test(ip, XFS_IRECLAIM));
973
974 /*
975 * We always use background reclaim here because even if the
976 * inode is clean, it still may be under IO and hence we have
977 * to take the flush lock. The background reclaim path handles
978 * this more efficiently than we can here, so simply let background
979 * reclaim tear down all inodes.
980 */
981 xfs_inode_set_reclaim_tag(ip);
982 }
983
984 /*
985 * Slab object creation initialisation for the XFS inode.
986 * This covers only the idempotent fields in the XFS inode;
987 * all other fields need to be initialised on allocation
988 * from the slab. This avoids the need to repeatedly initialise
989 * fields in the xfs inode that left in the initialise state
990 * when freeing the inode.
991 */
992 STATIC void
993 xfs_fs_inode_init_once(
994 void *inode)
995 {
996 struct xfs_inode *ip = inode;
997
998 memset(ip, 0, sizeof(struct xfs_inode));
999
1000 /* vfs inode */
1001 inode_init_once(VFS_I(ip));
1002
1003 /* xfs inode */
1004 atomic_set(&ip->i_pincount, 0);
1005 spin_lock_init(&ip->i_flags_lock);
1006
1007 mrlock_init(&ip->i_mmaplock, MRLOCK_ALLOW_EQUAL_PRI|MRLOCK_BARRIER,
1008 "xfsino", ip->i_ino);
1009 mrlock_init(&ip->i_lock, MRLOCK_ALLOW_EQUAL_PRI|MRLOCK_BARRIER,
1010 "xfsino", ip->i_ino);
1011 }
1012
1013 /*
1014 * We do an unlocked check for XFS_IDONTCACHE here because we are already
1015 * serialised against cache hits here via the inode->i_lock and igrab() in
1016 * xfs_iget_cache_hit(). Hence a lookup that might clear this flag will not be
1017 * racing with us, and it avoids needing to grab a spinlock here for every inode
1018 * we drop the final reference on.
1019 */
1020 STATIC int
1021 xfs_fs_drop_inode(
1022 struct inode *inode)
1023 {
1024 struct xfs_inode *ip = XFS_I(inode);
1025
1026 /*
1027 * If this unlinked inode is in the middle of recovery, don't
1028 * drop the inode just yet; log recovery will take care of
1029 * that. See the comment for this inode flag.
1030 */
1031 if (ip->i_flags & XFS_IRECOVERY) {
1032 ASSERT(ip->i_mount->m_log->l_flags & XLOG_RECOVERY_NEEDED);
1033 return 0;
1034 }
1035
1036 return generic_drop_inode(inode) || (ip->i_flags & XFS_IDONTCACHE);
1037 }
1038
1039 STATIC void
1040 xfs_free_fsname(
1041 struct xfs_mount *mp)
1042 {
1043 kfree(mp->m_fsname);
1044 kfree(mp->m_rtname);
1045 kfree(mp->m_logname);
1046 }
1047
1048 STATIC int
1049 xfs_fs_sync_fs(
1050 struct super_block *sb,
1051 int wait)
1052 {
1053 struct xfs_mount *mp = XFS_M(sb);
1054
1055 /*
1056 * Doing anything during the async pass would be counterproductive.
1057 */
1058 if (!wait)
1059 return 0;
1060
1061 xfs_log_force(mp, XFS_LOG_SYNC);
1062 if (laptop_mode) {
1063 /*
1064 * The disk must be active because we're syncing.
1065 * We schedule log work now (now that the disk is
1066 * active) instead of later (when it might not be).
1067 */
1068 flush_delayed_work(&mp->m_log->l_work);
1069 }
1070
1071 return 0;
1072 }
1073
1074 STATIC int
1075 xfs_fs_statfs(
1076 struct dentry *dentry,
1077 struct kstatfs *statp)
1078 {
1079 struct xfs_mount *mp = XFS_M(dentry->d_sb);
1080 xfs_sb_t *sbp = &mp->m_sb;
1081 struct xfs_inode *ip = XFS_I(d_inode(dentry));
1082 __uint64_t fakeinos, id;
1083 __uint64_t icount;
1084 __uint64_t ifree;
1085 __uint64_t fdblocks;
1086 xfs_extlen_t lsize;
1087 __int64_t ffree;
1088
1089 statp->f_type = XFS_SB_MAGIC;
1090 statp->f_namelen = MAXNAMELEN - 1;
1091
1092 id = huge_encode_dev(mp->m_ddev_targp->bt_dev);
1093 statp->f_fsid.val[0] = (u32)id;
1094 statp->f_fsid.val[1] = (u32)(id >> 32);
1095
1096 icount = percpu_counter_sum(&mp->m_icount);
1097 ifree = percpu_counter_sum(&mp->m_ifree);
1098 fdblocks = percpu_counter_sum(&mp->m_fdblocks);
1099
1100 spin_lock(&mp->m_sb_lock);
1101 statp->f_bsize = sbp->sb_blocksize;
1102 lsize = sbp->sb_logstart ? sbp->sb_logblocks : 0;
1103 statp->f_blocks = sbp->sb_dblocks - lsize;
1104 spin_unlock(&mp->m_sb_lock);
1105
1106 statp->f_bfree = fdblocks - mp->m_alloc_set_aside;
1107 statp->f_bavail = statp->f_bfree;
1108
1109 fakeinos = statp->f_bfree << sbp->sb_inopblog;
1110 statp->f_files = MIN(icount + fakeinos, (__uint64_t)XFS_MAXINUMBER);
1111 if (mp->m_maxicount)
1112 statp->f_files = min_t(typeof(statp->f_files),
1113 statp->f_files,
1114 mp->m_maxicount);
1115
1116 /* If sb_icount overshot maxicount, report actual allocation */
1117 statp->f_files = max_t(typeof(statp->f_files),
1118 statp->f_files,
1119 sbp->sb_icount);
1120
1121 /* make sure statp->f_ffree does not underflow */
1122 ffree = statp->f_files - (icount - ifree);
1123 statp->f_ffree = max_t(__int64_t, ffree, 0);
1124
1125
1126 if ((ip->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) &&
1127 ((mp->m_qflags & (XFS_PQUOTA_ACCT|XFS_PQUOTA_ENFD))) ==
1128 (XFS_PQUOTA_ACCT|XFS_PQUOTA_ENFD))
1129 xfs_qm_statvfs(ip, statp);
1130 return 0;
1131 }
1132
1133 STATIC void
1134 xfs_save_resvblks(struct xfs_mount *mp)
1135 {
1136 __uint64_t resblks = 0;
1137
1138 mp->m_resblks_save = mp->m_resblks;
1139 xfs_reserve_blocks(mp, &resblks, NULL);
1140 }
1141
1142 STATIC void
1143 xfs_restore_resvblks(struct xfs_mount *mp)
1144 {
1145 __uint64_t resblks;
1146
1147 if (mp->m_resblks_save) {
1148 resblks = mp->m_resblks_save;
1149 mp->m_resblks_save = 0;
1150 } else
1151 resblks = xfs_default_resblks(mp);
1152
1153 xfs_reserve_blocks(mp, &resblks, NULL);
1154 }
1155
1156 /*
1157 * Trigger writeback of all the dirty metadata in the file system.
1158 *
1159 * This ensures that the metadata is written to their location on disk rather
1160 * than just existing in transactions in the log. This means after a quiesce
1161 * there is no log replay required to write the inodes to disk - this is the
1162 * primary difference between a sync and a quiesce.
1163 *
1164 * Note: xfs_log_quiesce() stops background log work - the callers must ensure
1165 * it is started again when appropriate.
1166 */
1167 void
1168 xfs_quiesce_attr(
1169 struct xfs_mount *mp)
1170 {
1171 int error = 0;
1172
1173 /* wait for all modifications to complete */
1174 while (atomic_read(&mp->m_active_trans) > 0)
1175 delay(100);
1176
1177 /* force the log to unpin objects from the now complete transactions */
1178 xfs_log_force(mp, XFS_LOG_SYNC);
1179
1180 /* reclaim inodes to do any IO before the freeze completes */
1181 xfs_reclaim_inodes(mp, 0);
1182 xfs_reclaim_inodes(mp, SYNC_WAIT);
1183
1184 /* Push the superblock and write an unmount record */
1185 error = xfs_log_sbcount(mp);
1186 if (error)
1187 xfs_warn(mp, "xfs_attr_quiesce: failed to log sb changes. "
1188 "Frozen image may not be consistent.");
1189 /*
1190 * Just warn here till VFS can correctly support
1191 * read-only remount without racing.
1192 */
1193 WARN_ON(atomic_read(&mp->m_active_trans) != 0);
1194
1195 xfs_log_quiesce(mp);
1196 }
1197
1198 STATIC int
1199 xfs_test_remount_options(
1200 struct super_block *sb,
1201 struct xfs_mount *mp,
1202 char *options)
1203 {
1204 int error = 0;
1205 struct xfs_mount *tmp_mp;
1206
1207 tmp_mp = kmem_zalloc(sizeof(*tmp_mp), KM_MAYFAIL);
1208 if (!tmp_mp)
1209 return -ENOMEM;
1210
1211 tmp_mp->m_super = sb;
1212 error = xfs_parseargs(tmp_mp, options);
1213 xfs_free_fsname(tmp_mp);
1214 kfree(tmp_mp);
1215
1216 return error;
1217 }
1218
1219 STATIC int
1220 xfs_fs_remount(
1221 struct super_block *sb,
1222 int *flags,
1223 char *options)
1224 {
1225 struct xfs_mount *mp = XFS_M(sb);
1226 xfs_sb_t *sbp = &mp->m_sb;
1227 substring_t args[MAX_OPT_ARGS];
1228 char *p;
1229 int error;
1230
1231 /* First, check for complete junk; i.e. invalid options */
1232 error = xfs_test_remount_options(sb, mp, options);
1233 if (error)
1234 return error;
1235
1236 sync_filesystem(sb);
1237 while ((p = strsep(&options, ",")) != NULL) {
1238 int token;
1239
1240 if (!*p)
1241 continue;
1242
1243 token = match_token(p, tokens, args);
1244 switch (token) {
1245 case Opt_barrier:
1246 xfs_warn(mp, "%s option is deprecated, ignoring.", p);
1247 mp->m_flags |= XFS_MOUNT_BARRIER;
1248 break;
1249 case Opt_nobarrier:
1250 xfs_warn(mp, "%s option is deprecated, ignoring.", p);
1251 mp->m_flags &= ~XFS_MOUNT_BARRIER;
1252 break;
1253 case Opt_inode64:
1254 mp->m_flags &= ~XFS_MOUNT_SMALL_INUMS;
1255 mp->m_maxagi = xfs_set_inode_alloc(mp, sbp->sb_agcount);
1256 break;
1257 case Opt_inode32:
1258 mp->m_flags |= XFS_MOUNT_SMALL_INUMS;
1259 mp->m_maxagi = xfs_set_inode_alloc(mp, sbp->sb_agcount);
1260 break;
1261 default:
1262 /*
1263 * Logically we would return an error here to prevent
1264 * users from believing they might have changed
1265 * mount options using remount which can't be changed.
1266 *
1267 * But unfortunately mount(8) adds all options from
1268 * mtab and fstab to the mount arguments in some cases
1269 * so we can't blindly reject options, but have to
1270 * check for each specified option if it actually
1271 * differs from the currently set option and only
1272 * reject it if that's the case.
1273 *
1274 * Until that is implemented we return success for
1275 * every remount request, and silently ignore all
1276 * options that we can't actually change.
1277 */
1278 #if 0
1279 xfs_info(mp,
1280 "mount option \"%s\" not supported for remount", p);
1281 return -EINVAL;
1282 #else
1283 break;
1284 #endif
1285 }
1286 }
1287
1288 /* ro -> rw */
1289 if ((mp->m_flags & XFS_MOUNT_RDONLY) && !(*flags & MS_RDONLY)) {
1290 if (mp->m_flags & XFS_MOUNT_NORECOVERY) {
1291 xfs_warn(mp,
1292 "ro->rw transition prohibited on norecovery mount");
1293 return -EINVAL;
1294 }
1295
1296 if (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5 &&
1297 xfs_sb_has_ro_compat_feature(sbp,
1298 XFS_SB_FEAT_RO_COMPAT_UNKNOWN)) {
1299 xfs_warn(mp,
1300 "ro->rw transition prohibited on unknown (0x%x) ro-compat filesystem",
1301 (sbp->sb_features_ro_compat &
1302 XFS_SB_FEAT_RO_COMPAT_UNKNOWN));
1303 return -EINVAL;
1304 }
1305
1306 mp->m_flags &= ~XFS_MOUNT_RDONLY;
1307
1308 /*
1309 * If this is the first remount to writeable state we
1310 * might have some superblock changes to update.
1311 */
1312 if (mp->m_update_sb) {
1313 error = xfs_sync_sb(mp, false);
1314 if (error) {
1315 xfs_warn(mp, "failed to write sb changes");
1316 return error;
1317 }
1318 mp->m_update_sb = false;
1319 }
1320
1321 /*
1322 * Fill out the reserve pool if it is empty. Use the stashed
1323 * value if it is non-zero, otherwise go with the default.
1324 */
1325 xfs_restore_resvblks(mp);
1326 xfs_log_work_queue(mp);
1327 xfs_queue_eofblocks(mp);
1328
1329 /* Recover any CoW blocks that never got remapped. */
1330 error = xfs_reflink_recover_cow(mp);
1331 if (error) {
1332 xfs_err(mp,
1333 "Error %d recovering leftover CoW allocations.", error);
1334 xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE);
1335 return error;
1336 }
1337
1338 /* Create the per-AG metadata reservation pool .*/
1339 error = xfs_fs_reserve_ag_blocks(mp);
1340 if (error && error != -ENOSPC)
1341 return error;
1342 }
1343
1344 /* rw -> ro */
1345 if (!(mp->m_flags & XFS_MOUNT_RDONLY) && (*flags & MS_RDONLY)) {
1346 /* Free the per-AG metadata reservation pool. */
1347 error = xfs_fs_unreserve_ag_blocks(mp);
1348 if (error) {
1349 xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE);
1350 return error;
1351 }
1352
1353 /*
1354 * Before we sync the metadata, we need to free up the reserve
1355 * block pool so that the used block count in the superblock on
1356 * disk is correct at the end of the remount. Stash the current
1357 * reserve pool size so that if we get remounted rw, we can
1358 * return it to the same size.
1359 */
1360 xfs_save_resvblks(mp);
1361
1362 /*
1363 * Cancel background eofb scanning so it cannot race with the
1364 * final log force+buftarg wait and deadlock the remount.
1365 */
1366 cancel_delayed_work_sync(&mp->m_eofblocks_work);
1367
1368 xfs_quiesce_attr(mp);
1369 mp->m_flags |= XFS_MOUNT_RDONLY;
1370 }
1371
1372 return 0;
1373 }
1374
1375 /*
1376 * Second stage of a freeze. The data is already frozen so we only
1377 * need to take care of the metadata. Once that's done sync the superblock
1378 * to the log to dirty it in case of a crash while frozen. This ensures that we
1379 * will recover the unlinked inode lists on the next mount.
1380 */
1381 STATIC int
1382 xfs_fs_freeze(
1383 struct super_block *sb)
1384 {
1385 struct xfs_mount *mp = XFS_M(sb);
1386
1387 xfs_save_resvblks(mp);
1388 xfs_quiesce_attr(mp);
1389 return xfs_sync_sb(mp, true);
1390 }
1391
1392 STATIC int
1393 xfs_fs_unfreeze(
1394 struct super_block *sb)
1395 {
1396 struct xfs_mount *mp = XFS_M(sb);
1397
1398 xfs_restore_resvblks(mp);
1399 xfs_log_work_queue(mp);
1400 return 0;
1401 }
1402
1403 STATIC int
1404 xfs_fs_show_options(
1405 struct seq_file *m,
1406 struct dentry *root)
1407 {
1408 return xfs_showargs(XFS_M(root->d_sb), m);
1409 }
1410
1411 /*
1412 * This function fills in xfs_mount_t fields based on mount args.
1413 * Note: the superblock _has_ now been read in.
1414 */
1415 STATIC int
1416 xfs_finish_flags(
1417 struct xfs_mount *mp)
1418 {
1419 int ronly = (mp->m_flags & XFS_MOUNT_RDONLY);
1420
1421 /* Fail a mount where the logbuf is smaller than the log stripe */
1422 if (xfs_sb_version_haslogv2(&mp->m_sb)) {
1423 if (mp->m_logbsize <= 0 &&
1424 mp->m_sb.sb_logsunit > XLOG_BIG_RECORD_BSIZE) {
1425 mp->m_logbsize = mp->m_sb.sb_logsunit;
1426 } else if (mp->m_logbsize > 0 &&
1427 mp->m_logbsize < mp->m_sb.sb_logsunit) {
1428 xfs_warn(mp,
1429 "logbuf size must be greater than or equal to log stripe size");
1430 return -EINVAL;
1431 }
1432 } else {
1433 /* Fail a mount if the logbuf is larger than 32K */
1434 if (mp->m_logbsize > XLOG_BIG_RECORD_BSIZE) {
1435 xfs_warn(mp,
1436 "logbuf size for version 1 logs must be 16K or 32K");
1437 return -EINVAL;
1438 }
1439 }
1440
1441 /*
1442 * V5 filesystems always use attr2 format for attributes.
1443 */
1444 if (xfs_sb_version_hascrc(&mp->m_sb) &&
1445 (mp->m_flags & XFS_MOUNT_NOATTR2)) {
1446 xfs_warn(mp, "Cannot mount a V5 filesystem as noattr2. "
1447 "attr2 is always enabled for V5 filesystems.");
1448 return -EINVAL;
1449 }
1450
1451 /*
1452 * mkfs'ed attr2 will turn on attr2 mount unless explicitly
1453 * told by noattr2 to turn it off
1454 */
1455 if (xfs_sb_version_hasattr2(&mp->m_sb) &&
1456 !(mp->m_flags & XFS_MOUNT_NOATTR2))
1457 mp->m_flags |= XFS_MOUNT_ATTR2;
1458
1459 /*
1460 * prohibit r/w mounts of read-only filesystems
1461 */
1462 if ((mp->m_sb.sb_flags & XFS_SBF_READONLY) && !ronly) {
1463 xfs_warn(mp,
1464 "cannot mount a read-only filesystem as read-write");
1465 return -EROFS;
1466 }
1467
1468 if ((mp->m_qflags & (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE)) &&
1469 (mp->m_qflags & (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE)) &&
1470 !xfs_sb_version_has_pquotino(&mp->m_sb)) {
1471 xfs_warn(mp,
1472 "Super block does not support project and group quota together");
1473 return -EINVAL;
1474 }
1475
1476 return 0;
1477 }
1478
1479 static int
1480 xfs_init_percpu_counters(
1481 struct xfs_mount *mp)
1482 {
1483 int error;
1484
1485 error = percpu_counter_init(&mp->m_icount, 0, GFP_KERNEL);
1486 if (error)
1487 return -ENOMEM;
1488
1489 error = percpu_counter_init(&mp->m_ifree, 0, GFP_KERNEL);
1490 if (error)
1491 goto free_icount;
1492
1493 error = percpu_counter_init(&mp->m_fdblocks, 0, GFP_KERNEL);
1494 if (error)
1495 goto free_ifree;
1496
1497 return 0;
1498
1499 free_ifree:
1500 percpu_counter_destroy(&mp->m_ifree);
1501 free_icount:
1502 percpu_counter_destroy(&mp->m_icount);
1503 return -ENOMEM;
1504 }
1505
1506 void
1507 xfs_reinit_percpu_counters(
1508 struct xfs_mount *mp)
1509 {
1510 percpu_counter_set(&mp->m_icount, mp->m_sb.sb_icount);
1511 percpu_counter_set(&mp->m_ifree, mp->m_sb.sb_ifree);
1512 percpu_counter_set(&mp->m_fdblocks, mp->m_sb.sb_fdblocks);
1513 }
1514
1515 static void
1516 xfs_destroy_percpu_counters(
1517 struct xfs_mount *mp)
1518 {
1519 percpu_counter_destroy(&mp->m_icount);
1520 percpu_counter_destroy(&mp->m_ifree);
1521 percpu_counter_destroy(&mp->m_fdblocks);
1522 }
1523
1524 STATIC int
1525 xfs_fs_fill_super(
1526 struct super_block *sb,
1527 void *data,
1528 int silent)
1529 {
1530 struct inode *root;
1531 struct xfs_mount *mp = NULL;
1532 int flags = 0, error = -ENOMEM;
1533
1534 mp = kzalloc(sizeof(struct xfs_mount), GFP_KERNEL);
1535 if (!mp)
1536 goto out;
1537
1538 spin_lock_init(&mp->m_sb_lock);
1539 mutex_init(&mp->m_growlock);
1540 atomic_set(&mp->m_active_trans, 0);
1541 INIT_DELAYED_WORK(&mp->m_reclaim_work, xfs_reclaim_worker);
1542 INIT_DELAYED_WORK(&mp->m_eofblocks_work, xfs_eofblocks_worker);
1543 INIT_DELAYED_WORK(&mp->m_cowblocks_work, xfs_cowblocks_worker);
1544 mp->m_kobj.kobject.kset = xfs_kset;
1545
1546 mp->m_super = sb;
1547 sb->s_fs_info = mp;
1548
1549 error = xfs_parseargs(mp, (char *)data);
1550 if (error)
1551 goto out_free_fsname;
1552
1553 sb_min_blocksize(sb, BBSIZE);
1554 sb->s_xattr = xfs_xattr_handlers;
1555 sb->s_export_op = &xfs_export_operations;
1556 #ifdef CONFIG_XFS_QUOTA
1557 sb->s_qcop = &xfs_quotactl_operations;
1558 sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP | QTYPE_MASK_PRJ;
1559 #endif
1560 sb->s_op = &xfs_super_operations;
1561
1562 if (silent)
1563 flags |= XFS_MFSI_QUIET;
1564
1565 error = xfs_open_devices(mp);
1566 if (error)
1567 goto out_free_fsname;
1568
1569 error = xfs_init_mount_workqueues(mp);
1570 if (error)
1571 goto out_close_devices;
1572
1573 error = xfs_init_percpu_counters(mp);
1574 if (error)
1575 goto out_destroy_workqueues;
1576
1577 /* Allocate stats memory before we do operations that might use it */
1578 mp->m_stats.xs_stats = alloc_percpu(struct xfsstats);
1579 if (!mp->m_stats.xs_stats) {
1580 error = -ENOMEM;
1581 goto out_destroy_counters;
1582 }
1583
1584 error = xfs_readsb(mp, flags);
1585 if (error)
1586 goto out_free_stats;
1587
1588 error = xfs_finish_flags(mp);
1589 if (error)
1590 goto out_free_sb;
1591
1592 error = xfs_setup_devices(mp);
1593 if (error)
1594 goto out_free_sb;
1595
1596 error = xfs_filestream_mount(mp);
1597 if (error)
1598 goto out_free_sb;
1599
1600 /*
1601 * we must configure the block size in the superblock before we run the
1602 * full mount process as the mount process can lookup and cache inodes.
1603 */
1604 sb->s_magic = XFS_SB_MAGIC;
1605 sb->s_blocksize = mp->m_sb.sb_blocksize;
1606 sb->s_blocksize_bits = ffs(sb->s_blocksize) - 1;
1607 sb->s_maxbytes = xfs_max_file_offset(sb->s_blocksize_bits);
1608 sb->s_max_links = XFS_MAXLINK;
1609 sb->s_time_gran = 1;
1610 set_posix_acl_flag(sb);
1611
1612 /* version 5 superblocks support inode version counters. */
1613 if (XFS_SB_VERSION_NUM(&mp->m_sb) == XFS_SB_VERSION_5)
1614 sb->s_flags |= MS_I_VERSION;
1615
1616 if (mp->m_flags & XFS_MOUNT_DAX) {
1617 xfs_warn(mp,
1618 "DAX enabled. Warning: EXPERIMENTAL, use at your own risk");
1619
1620 error = bdev_dax_supported(sb, sb->s_blocksize);
1621 if (error) {
1622 xfs_alert(mp,
1623 "DAX unsupported by block device. Turning off DAX.");
1624 mp->m_flags &= ~XFS_MOUNT_DAX;
1625 }
1626 if (xfs_sb_version_hasreflink(&mp->m_sb))
1627 xfs_alert(mp,
1628 "DAX and reflink have not been tested together!");
1629 }
1630
1631 if (xfs_sb_version_hasrmapbt(&mp->m_sb)) {
1632 if (mp->m_sb.sb_rblocks) {
1633 xfs_alert(mp,
1634 "EXPERIMENTAL reverse mapping btree not compatible with realtime device!");
1635 error = -EINVAL;
1636 goto out_filestream_unmount;
1637 }
1638 xfs_alert(mp,
1639 "EXPERIMENTAL reverse mapping btree feature enabled. Use at your own risk!");
1640 }
1641
1642 if (xfs_sb_version_hasreflink(&mp->m_sb))
1643 xfs_alert(mp,
1644 "EXPERIMENTAL reflink feature enabled. Use at your own risk!");
1645
1646 error = xfs_mountfs(mp);
1647 if (error)
1648 goto out_filestream_unmount;
1649
1650 root = igrab(VFS_I(mp->m_rootip));
1651 if (!root) {
1652 error = -ENOENT;
1653 goto out_unmount;
1654 }
1655 sb->s_root = d_make_root(root);
1656 if (!sb->s_root) {
1657 error = -ENOMEM;
1658 goto out_unmount;
1659 }
1660
1661 return 0;
1662
1663 out_filestream_unmount:
1664 xfs_filestream_unmount(mp);
1665 out_free_sb:
1666 xfs_freesb(mp);
1667 out_free_stats:
1668 free_percpu(mp->m_stats.xs_stats);
1669 out_destroy_counters:
1670 xfs_destroy_percpu_counters(mp);
1671 out_destroy_workqueues:
1672 xfs_destroy_mount_workqueues(mp);
1673 out_close_devices:
1674 xfs_close_devices(mp);
1675 out_free_fsname:
1676 xfs_free_fsname(mp);
1677 kfree(mp);
1678 out:
1679 return error;
1680
1681 out_unmount:
1682 xfs_filestream_unmount(mp);
1683 xfs_unmountfs(mp);
1684 goto out_free_sb;
1685 }
1686
1687 STATIC void
1688 xfs_fs_put_super(
1689 struct super_block *sb)
1690 {
1691 struct xfs_mount *mp = XFS_M(sb);
1692
1693 xfs_notice(mp, "Unmounting Filesystem");
1694 xfs_filestream_unmount(mp);
1695 xfs_unmountfs(mp);
1696
1697 xfs_freesb(mp);
1698 free_percpu(mp->m_stats.xs_stats);
1699 xfs_destroy_percpu_counters(mp);
1700 xfs_destroy_mount_workqueues(mp);
1701 xfs_close_devices(mp);
1702 xfs_free_fsname(mp);
1703 kfree(mp);
1704 }
1705
1706 STATIC struct dentry *
1707 xfs_fs_mount(
1708 struct file_system_type *fs_type,
1709 int flags,
1710 const char *dev_name,
1711 void *data)
1712 {
1713 return mount_bdev(fs_type, flags, dev_name, data, xfs_fs_fill_super);
1714 }
1715
1716 static long
1717 xfs_fs_nr_cached_objects(
1718 struct super_block *sb,
1719 struct shrink_control *sc)
1720 {
1721 return xfs_reclaim_inodes_count(XFS_M(sb));
1722 }
1723
1724 static long
1725 xfs_fs_free_cached_objects(
1726 struct super_block *sb,
1727 struct shrink_control *sc)
1728 {
1729 return xfs_reclaim_inodes_nr(XFS_M(sb), sc->nr_to_scan);
1730 }
1731
1732 static const struct super_operations xfs_super_operations = {
1733 .alloc_inode = xfs_fs_alloc_inode,
1734 .destroy_inode = xfs_fs_destroy_inode,
1735 .drop_inode = xfs_fs_drop_inode,
1736 .put_super = xfs_fs_put_super,
1737 .sync_fs = xfs_fs_sync_fs,
1738 .freeze_fs = xfs_fs_freeze,
1739 .unfreeze_fs = xfs_fs_unfreeze,
1740 .statfs = xfs_fs_statfs,
1741 .remount_fs = xfs_fs_remount,
1742 .show_options = xfs_fs_show_options,
1743 .nr_cached_objects = xfs_fs_nr_cached_objects,
1744 .free_cached_objects = xfs_fs_free_cached_objects,
1745 };
1746
1747 static struct file_system_type xfs_fs_type = {
1748 .owner = THIS_MODULE,
1749 .name = "xfs",
1750 .mount = xfs_fs_mount,
1751 .kill_sb = kill_block_super,
1752 .fs_flags = FS_REQUIRES_DEV,
1753 };
1754 MODULE_ALIAS_FS("xfs");
1755
1756 STATIC int __init
1757 xfs_init_zones(void)
1758 {
1759 xfs_ioend_bioset = bioset_create(4 * MAX_BUF_PER_PAGE,
1760 offsetof(struct xfs_ioend, io_inline_bio));
1761 if (!xfs_ioend_bioset)
1762 goto out;
1763
1764 xfs_log_ticket_zone = kmem_zone_init(sizeof(xlog_ticket_t),
1765 "xfs_log_ticket");
1766 if (!xfs_log_ticket_zone)
1767 goto out_free_ioend_bioset;
1768
1769 xfs_bmap_free_item_zone = kmem_zone_init(
1770 sizeof(struct xfs_extent_free_item),
1771 "xfs_bmap_free_item");
1772 if (!xfs_bmap_free_item_zone)
1773 goto out_destroy_log_ticket_zone;
1774
1775 xfs_btree_cur_zone = kmem_zone_init(sizeof(xfs_btree_cur_t),
1776 "xfs_btree_cur");
1777 if (!xfs_btree_cur_zone)
1778 goto out_destroy_bmap_free_item_zone;
1779
1780 xfs_da_state_zone = kmem_zone_init(sizeof(xfs_da_state_t),
1781 "xfs_da_state");
1782 if (!xfs_da_state_zone)
1783 goto out_destroy_btree_cur_zone;
1784
1785 xfs_ifork_zone = kmem_zone_init(sizeof(xfs_ifork_t), "xfs_ifork");
1786 if (!xfs_ifork_zone)
1787 goto out_destroy_da_state_zone;
1788
1789 xfs_trans_zone = kmem_zone_init(sizeof(xfs_trans_t), "xfs_trans");
1790 if (!xfs_trans_zone)
1791 goto out_destroy_ifork_zone;
1792
1793 xfs_log_item_desc_zone =
1794 kmem_zone_init(sizeof(struct xfs_log_item_desc),
1795 "xfs_log_item_desc");
1796 if (!xfs_log_item_desc_zone)
1797 goto out_destroy_trans_zone;
1798
1799 /*
1800 * The size of the zone allocated buf log item is the maximum
1801 * size possible under XFS. This wastes a little bit of memory,
1802 * but it is much faster.
1803 */
1804 xfs_buf_item_zone = kmem_zone_init(sizeof(struct xfs_buf_log_item),
1805 "xfs_buf_item");
1806 if (!xfs_buf_item_zone)
1807 goto out_destroy_log_item_desc_zone;
1808
1809 xfs_efd_zone = kmem_zone_init((sizeof(xfs_efd_log_item_t) +
1810 ((XFS_EFD_MAX_FAST_EXTENTS - 1) *
1811 sizeof(xfs_extent_t))), "xfs_efd_item");
1812 if (!xfs_efd_zone)
1813 goto out_destroy_buf_item_zone;
1814
1815 xfs_efi_zone = kmem_zone_init((sizeof(xfs_efi_log_item_t) +
1816 ((XFS_EFI_MAX_FAST_EXTENTS - 1) *
1817 sizeof(xfs_extent_t))), "xfs_efi_item");
1818 if (!xfs_efi_zone)
1819 goto out_destroy_efd_zone;
1820
1821 xfs_inode_zone =
1822 kmem_zone_init_flags(sizeof(xfs_inode_t), "xfs_inode",
1823 KM_ZONE_HWALIGN | KM_ZONE_RECLAIM | KM_ZONE_SPREAD |
1824 KM_ZONE_ACCOUNT, xfs_fs_inode_init_once);
1825 if (!xfs_inode_zone)
1826 goto out_destroy_efi_zone;
1827
1828 xfs_ili_zone =
1829 kmem_zone_init_flags(sizeof(xfs_inode_log_item_t), "xfs_ili",
1830 KM_ZONE_SPREAD, NULL);
1831 if (!xfs_ili_zone)
1832 goto out_destroy_inode_zone;
1833 xfs_icreate_zone = kmem_zone_init(sizeof(struct xfs_icreate_item),
1834 "xfs_icr");
1835 if (!xfs_icreate_zone)
1836 goto out_destroy_ili_zone;
1837
1838 xfs_rud_zone = kmem_zone_init(sizeof(struct xfs_rud_log_item),
1839 "xfs_rud_item");
1840 if (!xfs_rud_zone)
1841 goto out_destroy_icreate_zone;
1842
1843 xfs_rui_zone = kmem_zone_init(
1844 xfs_rui_log_item_sizeof(XFS_RUI_MAX_FAST_EXTENTS),
1845 "xfs_rui_item");
1846 if (!xfs_rui_zone)
1847 goto out_destroy_rud_zone;
1848
1849 xfs_cud_zone = kmem_zone_init(sizeof(struct xfs_cud_log_item),
1850 "xfs_cud_item");
1851 if (!xfs_cud_zone)
1852 goto out_destroy_rui_zone;
1853
1854 xfs_cui_zone = kmem_zone_init(
1855 xfs_cui_log_item_sizeof(XFS_CUI_MAX_FAST_EXTENTS),
1856 "xfs_cui_item");
1857 if (!xfs_cui_zone)
1858 goto out_destroy_cud_zone;
1859
1860 xfs_bud_zone = kmem_zone_init(sizeof(struct xfs_bud_log_item),
1861 "xfs_bud_item");
1862 if (!xfs_bud_zone)
1863 goto out_destroy_cui_zone;
1864
1865 xfs_bui_zone = kmem_zone_init(
1866 xfs_bui_log_item_sizeof(XFS_BUI_MAX_FAST_EXTENTS),
1867 "xfs_bui_item");
1868 if (!xfs_bui_zone)
1869 goto out_destroy_bud_zone;
1870
1871 return 0;
1872
1873 out_destroy_bud_zone:
1874 kmem_zone_destroy(xfs_bud_zone);
1875 out_destroy_cui_zone:
1876 kmem_zone_destroy(xfs_cui_zone);
1877 out_destroy_cud_zone:
1878 kmem_zone_destroy(xfs_cud_zone);
1879 out_destroy_rui_zone:
1880 kmem_zone_destroy(xfs_rui_zone);
1881 out_destroy_rud_zone:
1882 kmem_zone_destroy(xfs_rud_zone);
1883 out_destroy_icreate_zone:
1884 kmem_zone_destroy(xfs_icreate_zone);
1885 out_destroy_ili_zone:
1886 kmem_zone_destroy(xfs_ili_zone);
1887 out_destroy_inode_zone:
1888 kmem_zone_destroy(xfs_inode_zone);
1889 out_destroy_efi_zone:
1890 kmem_zone_destroy(xfs_efi_zone);
1891 out_destroy_efd_zone:
1892 kmem_zone_destroy(xfs_efd_zone);
1893 out_destroy_buf_item_zone:
1894 kmem_zone_destroy(xfs_buf_item_zone);
1895 out_destroy_log_item_desc_zone:
1896 kmem_zone_destroy(xfs_log_item_desc_zone);
1897 out_destroy_trans_zone:
1898 kmem_zone_destroy(xfs_trans_zone);
1899 out_destroy_ifork_zone:
1900 kmem_zone_destroy(xfs_ifork_zone);
1901 out_destroy_da_state_zone:
1902 kmem_zone_destroy(xfs_da_state_zone);
1903 out_destroy_btree_cur_zone:
1904 kmem_zone_destroy(xfs_btree_cur_zone);
1905 out_destroy_bmap_free_item_zone:
1906 kmem_zone_destroy(xfs_bmap_free_item_zone);
1907 out_destroy_log_ticket_zone:
1908 kmem_zone_destroy(xfs_log_ticket_zone);
1909 out_free_ioend_bioset:
1910 bioset_free(xfs_ioend_bioset);
1911 out:
1912 return -ENOMEM;
1913 }
1914
1915 STATIC void
1916 xfs_destroy_zones(void)
1917 {
1918 /*
1919 * Make sure all delayed rcu free are flushed before we
1920 * destroy caches.
1921 */
1922 rcu_barrier();
1923 kmem_zone_destroy(xfs_bui_zone);
1924 kmem_zone_destroy(xfs_bud_zone);
1925 kmem_zone_destroy(xfs_cui_zone);
1926 kmem_zone_destroy(xfs_cud_zone);
1927 kmem_zone_destroy(xfs_rui_zone);
1928 kmem_zone_destroy(xfs_rud_zone);
1929 kmem_zone_destroy(xfs_icreate_zone);
1930 kmem_zone_destroy(xfs_ili_zone);
1931 kmem_zone_destroy(xfs_inode_zone);
1932 kmem_zone_destroy(xfs_efi_zone);
1933 kmem_zone_destroy(xfs_efd_zone);
1934 kmem_zone_destroy(xfs_buf_item_zone);
1935 kmem_zone_destroy(xfs_log_item_desc_zone);
1936 kmem_zone_destroy(xfs_trans_zone);
1937 kmem_zone_destroy(xfs_ifork_zone);
1938 kmem_zone_destroy(xfs_da_state_zone);
1939 kmem_zone_destroy(xfs_btree_cur_zone);
1940 kmem_zone_destroy(xfs_bmap_free_item_zone);
1941 kmem_zone_destroy(xfs_log_ticket_zone);
1942 bioset_free(xfs_ioend_bioset);
1943 }
1944
1945 STATIC int __init
1946 xfs_init_workqueues(void)
1947 {
1948 /*
1949 * The allocation workqueue can be used in memory reclaim situations
1950 * (writepage path), and parallelism is only limited by the number of
1951 * AGs in all the filesystems mounted. Hence use the default large
1952 * max_active value for this workqueue.
1953 */
1954 xfs_alloc_wq = alloc_workqueue("xfsalloc",
1955 WQ_MEM_RECLAIM|WQ_FREEZABLE, 0);
1956 if (!xfs_alloc_wq)
1957 return -ENOMEM;
1958
1959 return 0;
1960 }
1961
1962 STATIC void
1963 xfs_destroy_workqueues(void)
1964 {
1965 destroy_workqueue(xfs_alloc_wq);
1966 }
1967
1968 STATIC int __init
1969 init_xfs_fs(void)
1970 {
1971 int error;
1972
1973 xfs_check_ondisk_structs();
1974
1975 printk(KERN_INFO XFS_VERSION_STRING " with "
1976 XFS_BUILD_OPTIONS " enabled\n");
1977
1978 xfs_extent_free_init_defer_op();
1979 xfs_rmap_update_init_defer_op();
1980 xfs_refcount_update_init_defer_op();
1981 xfs_bmap_update_init_defer_op();
1982
1983 xfs_dir_startup();
1984
1985 error = xfs_init_zones();
1986 if (error)
1987 goto out;
1988
1989 error = xfs_init_workqueues();
1990 if (error)
1991 goto out_destroy_zones;
1992
1993 error = xfs_mru_cache_init();
1994 if (error)
1995 goto out_destroy_wq;
1996
1997 error = xfs_buf_init();
1998 if (error)
1999 goto out_mru_cache_uninit;
2000
2001 error = xfs_init_procfs();
2002 if (error)
2003 goto out_buf_terminate;
2004
2005 error = xfs_sysctl_register();
2006 if (error)
2007 goto out_cleanup_procfs;
2008
2009 xfs_kset = kset_create_and_add("xfs", NULL, fs_kobj);
2010 if (!xfs_kset) {
2011 error = -ENOMEM;
2012 goto out_sysctl_unregister;
2013 }
2014
2015 xfsstats.xs_kobj.kobject.kset = xfs_kset;
2016
2017 xfsstats.xs_stats = alloc_percpu(struct xfsstats);
2018 if (!xfsstats.xs_stats) {
2019 error = -ENOMEM;
2020 goto out_kset_unregister;
2021 }
2022
2023 error = xfs_sysfs_init(&xfsstats.xs_kobj, &xfs_stats_ktype, NULL,
2024 "stats");
2025 if (error)
2026 goto out_free_stats;
2027
2028 #ifdef DEBUG
2029 xfs_dbg_kobj.kobject.kset = xfs_kset;
2030 error = xfs_sysfs_init(&xfs_dbg_kobj, &xfs_dbg_ktype, NULL, "debug");
2031 if (error)
2032 goto out_remove_stats_kobj;
2033 #endif
2034
2035 error = xfs_qm_init();
2036 if (error)
2037 goto out_remove_dbg_kobj;
2038
2039 error = register_filesystem(&xfs_fs_type);
2040 if (error)
2041 goto out_qm_exit;
2042 return 0;
2043
2044 out_qm_exit:
2045 xfs_qm_exit();
2046 out_remove_dbg_kobj:
2047 #ifdef DEBUG
2048 xfs_sysfs_del(&xfs_dbg_kobj);
2049 out_remove_stats_kobj:
2050 #endif
2051 xfs_sysfs_del(&xfsstats.xs_kobj);
2052 out_free_stats:
2053 free_percpu(xfsstats.xs_stats);
2054 out_kset_unregister:
2055 kset_unregister(xfs_kset);
2056 out_sysctl_unregister:
2057 xfs_sysctl_unregister();
2058 out_cleanup_procfs:
2059 xfs_cleanup_procfs();
2060 out_buf_terminate:
2061 xfs_buf_terminate();
2062 out_mru_cache_uninit:
2063 xfs_mru_cache_uninit();
2064 out_destroy_wq:
2065 xfs_destroy_workqueues();
2066 out_destroy_zones:
2067 xfs_destroy_zones();
2068 out:
2069 return error;
2070 }
2071
2072 STATIC void __exit
2073 exit_xfs_fs(void)
2074 {
2075 xfs_qm_exit();
2076 unregister_filesystem(&xfs_fs_type);
2077 #ifdef DEBUG
2078 xfs_sysfs_del(&xfs_dbg_kobj);
2079 #endif
2080 xfs_sysfs_del(&xfsstats.xs_kobj);
2081 free_percpu(xfsstats.xs_stats);
2082 kset_unregister(xfs_kset);
2083 xfs_sysctl_unregister();
2084 xfs_cleanup_procfs();
2085 xfs_buf_terminate();
2086 xfs_mru_cache_uninit();
2087 xfs_destroy_workqueues();
2088 xfs_destroy_zones();
2089 xfs_uuid_table_free();
2090 }
2091
2092 module_init(init_xfs_fs);
2093 module_exit(exit_xfs_fs);
2094
2095 MODULE_AUTHOR("Silicon Graphics, Inc.");
2096 MODULE_DESCRIPTION(XFS_VERSION_STRING " with " XFS_BUILD_OPTIONS " enabled");
2097 MODULE_LICENSE("GPL");
Linux with added FPC-III support