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perf stat: Fix duplicate PMU name for interval print
[linux/fpc-iii.git] / fs / xfs / xfs_super.c
blobd71424052917c716b460ba5e4170fbd0ef17b1c5
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/dax.h>
56 #include <linux/init.h>
57 #include <linux/slab.h>
58 #include <linux/mount.h>
59 #include <linux/mempool.h>
60 #include <linux/writeback.h>
61 #include <linux/kthread.h>
62 #include <linux/freezer.h>
63 #include <linux/parser.h>
64
65 static const struct super_operations xfs_super_operations;
66 struct bio_set *xfs_ioend_bioset;
67
68 static struct kset *xfs_kset; /* top-level xfs sysfs dir */
69 #ifdef DEBUG
70 static struct xfs_kobj xfs_dbg_kobj; /* global debug sysfs attrs */
71 #endif
72
73 /*
74 * Table driven mount option parser.
75 */
76 enum {
77 Opt_logbufs, Opt_logbsize, Opt_logdev, Opt_rtdev, Opt_biosize,
78 Opt_wsync, Opt_noalign, Opt_swalloc, Opt_sunit, Opt_swidth, Opt_nouuid,
79 Opt_mtpt, Opt_grpid, Opt_nogrpid, Opt_bsdgroups, Opt_sysvgroups,
80 Opt_allocsize, Opt_norecovery, Opt_barrier, Opt_nobarrier,
81 Opt_inode64, Opt_inode32, Opt_ikeep, Opt_noikeep,
82 Opt_largeio, Opt_nolargeio, Opt_attr2, Opt_noattr2, Opt_filestreams,
83 Opt_quota, Opt_noquota, Opt_usrquota, Opt_grpquota, Opt_prjquota,
84 Opt_uquota, Opt_gquota, Opt_pquota,
85 Opt_uqnoenforce, Opt_gqnoenforce, Opt_pqnoenforce, Opt_qnoenforce,
86 Opt_discard, Opt_nodiscard, Opt_dax, Opt_err,
87 };
88
89 static const match_table_t tokens = {
90 {Opt_logbufs, "logbufs=%u"}, /* number of XFS log buffers */
91 {Opt_logbsize, "logbsize=%s"}, /* size of XFS log buffers */
92 {Opt_logdev, "logdev=%s"}, /* log device */
93 {Opt_rtdev, "rtdev=%s"}, /* realtime I/O device */
94 {Opt_biosize, "biosize=%u"}, /* log2 of preferred buffered io size */
95 {Opt_wsync, "wsync"}, /* safe-mode nfs compatible mount */
96 {Opt_noalign, "noalign"}, /* turn off stripe alignment */
97 {Opt_swalloc, "swalloc"}, /* turn on stripe width allocation */
98 {Opt_sunit, "sunit=%u"}, /* data volume stripe unit */
99 {Opt_swidth, "swidth=%u"}, /* data volume stripe width */
100 {Opt_nouuid, "nouuid"}, /* ignore filesystem UUID */
101 {Opt_mtpt, "mtpt"}, /* filesystem mount point */
102 {Opt_grpid, "grpid"}, /* group-ID from parent directory */
103 {Opt_nogrpid, "nogrpid"}, /* group-ID from current process */
104 {Opt_bsdgroups, "bsdgroups"}, /* group-ID from parent directory */
105 {Opt_sysvgroups,"sysvgroups"}, /* group-ID from current process */
106 {Opt_allocsize, "allocsize=%s"},/* preferred allocation size */
107 {Opt_norecovery,"norecovery"}, /* don't run XFS recovery */
108 {Opt_inode64, "inode64"}, /* inodes can be allocated anywhere */
109 {Opt_inode32, "inode32"}, /* inode allocation limited to
110 * XFS_MAXINUMBER_32 */
111 {Opt_ikeep, "ikeep"}, /* do not free empty inode clusters */
112 {Opt_noikeep, "noikeep"}, /* free empty inode clusters */
113 {Opt_largeio, "largeio"}, /* report large I/O sizes in stat() */
114 {Opt_nolargeio, "nolargeio"}, /* do not report large I/O sizes
115 * in stat(). */
116 {Opt_attr2, "attr2"}, /* do use attr2 attribute format */
117 {Opt_noattr2, "noattr2"}, /* do not use attr2 attribute format */
118 {Opt_filestreams,"filestreams"},/* use filestreams allocator */
119 {Opt_quota, "quota"}, /* disk quotas (user) */
120 {Opt_noquota, "noquota"}, /* no quotas */
121 {Opt_usrquota, "usrquota"}, /* user quota enabled */
122 {Opt_grpquota, "grpquota"}, /* group quota enabled */
123 {Opt_prjquota, "prjquota"}, /* project quota enabled */
124 {Opt_uquota, "uquota"}, /* user quota (IRIX variant) */
125 {Opt_gquota, "gquota"}, /* group quota (IRIX variant) */
126 {Opt_pquota, "pquota"}, /* project quota (IRIX variant) */
127 {Opt_uqnoenforce,"uqnoenforce"},/* user quota limit enforcement */
128 {Opt_gqnoenforce,"gqnoenforce"},/* group quota limit enforcement */
129 {Opt_pqnoenforce,"pqnoenforce"},/* project quota limit enforcement */
130 {Opt_qnoenforce, "qnoenforce"}, /* same as uqnoenforce */
131 {Opt_discard, "discard"}, /* Discard unused blocks */
132 {Opt_nodiscard, "nodiscard"}, /* Do not discard unused blocks */
133
134 {Opt_dax, "dax"}, /* Enable direct access to bdev pages */
135
136 /* Deprecated mount options scheduled for removal */
137 {Opt_barrier, "barrier"}, /* use writer barriers for log write and
138 * unwritten extent conversion */
139 {Opt_nobarrier, "nobarrier"}, /* .. disable */
140
141 {Opt_err, NULL},
142 };
143
144
145 STATIC int
146 suffix_kstrtoint(const substring_t *s, unsigned int base, int *res)
147 {
148 int last, shift_left_factor = 0, _res;
149 char *value;
150 int ret = 0;
151
152 value = match_strdup(s);
153 if (!value)
154 return -ENOMEM;
155
156 last = strlen(value) - 1;
157 if (value[last] == 'K' || value[last] == 'k') {
158 shift_left_factor = 10;
159 value[last] = '\0';
160 }
161 if (value[last] == 'M' || value[last] == 'm') {
162 shift_left_factor = 20;
163 value[last] = '\0';
164 }
165 if (value[last] == 'G' || value[last] == 'g') {
166 shift_left_factor = 30;
167 value[last] = '\0';
168 }
169
170 if (kstrtoint(value, base, &_res))
171 ret = -EINVAL;
172 kfree(value);
173 *res = _res << shift_left_factor;
174 return ret;
175 }
176
177 /*
178 * This function fills in xfs_mount_t fields based on mount args.
179 * Note: the superblock has _not_ yet been read in.
180 *
181 * Note that this function leaks the various device name allocations on
182 * failure. The caller takes care of them.
183 *
184 * *sb is const because this is also used to test options on the remount
185 * path, and we don't want this to have any side effects at remount time.
186 * Today this function does not change *sb, but just to future-proof...
187 */
188 STATIC int
189 xfs_parseargs(
190 struct xfs_mount *mp,
191 char *options)
192 {
193 const struct super_block *sb = mp->m_super;
194 char *p;
195 substring_t args[MAX_OPT_ARGS];
196 int dsunit = 0;
197 int dswidth = 0;
198 int iosize = 0;
199 uint8_t iosizelog = 0;
200
201 /*
202 * set up the mount name first so all the errors will refer to the
203 * correct device.
204 */
205 mp->m_fsname = kstrndup(sb->s_id, MAXNAMELEN, GFP_KERNEL);
206 if (!mp->m_fsname)
207 return -ENOMEM;
208 mp->m_fsname_len = strlen(mp->m_fsname) + 1;
209
210 /*
211 * Copy binary VFS mount flags we are interested in.
212 */
213 if (sb_rdonly(sb))
214 mp->m_flags |= XFS_MOUNT_RDONLY;
215 if (sb->s_flags & SB_DIRSYNC)
216 mp->m_flags |= XFS_MOUNT_DIRSYNC;
217 if (sb->s_flags & SB_SYNCHRONOUS)
218 mp->m_flags |= XFS_MOUNT_WSYNC;
219
220 /*
221 * Set some default flags that could be cleared by the mount option
222 * parsing.
223 */
224 mp->m_flags |= XFS_MOUNT_BARRIER;
225 mp->m_flags |= XFS_MOUNT_COMPAT_IOSIZE;
226
227 /*
228 * These can be overridden by the mount option parsing.
229 */
230 mp->m_logbufs = -1;
231 mp->m_logbsize = -1;
232
233 if (!options)
234 goto done;
235
236 while ((p = strsep(&options, ",")) != NULL) {
237 int token;
238
239 if (!*p)
240 continue;
241
242 token = match_token(p, tokens, args);
243 switch (token) {
244 case Opt_logbufs:
245 if (match_int(args, &mp->m_logbufs))
246 return -EINVAL;
247 break;
248 case Opt_logbsize:
249 if (suffix_kstrtoint(args, 10, &mp->m_logbsize))
250 return -EINVAL;
251 break;
252 case Opt_logdev:
253 kfree(mp->m_logname);
254 mp->m_logname = match_strdup(args);
255 if (!mp->m_logname)
256 return -ENOMEM;
257 break;
258 case Opt_mtpt:
259 xfs_warn(mp, "%s option not allowed on this system", p);
260 return -EINVAL;
261 case Opt_rtdev:
262 kfree(mp->m_rtname);
263 mp->m_rtname = match_strdup(args);
264 if (!mp->m_rtname)
265 return -ENOMEM;
266 break;
267 case Opt_allocsize:
268 case Opt_biosize:
269 if (suffix_kstrtoint(args, 10, &iosize))
270 return -EINVAL;
271 iosizelog = ffs(iosize) - 1;
272 break;
273 case Opt_grpid:
274 case Opt_bsdgroups:
275 mp->m_flags |= XFS_MOUNT_GRPID;
276 break;
277 case Opt_nogrpid:
278 case Opt_sysvgroups:
279 mp->m_flags &= ~XFS_MOUNT_GRPID;
280 break;
281 case Opt_wsync:
282 mp->m_flags |= XFS_MOUNT_WSYNC;
283 break;
284 case Opt_norecovery:
285 mp->m_flags |= XFS_MOUNT_NORECOVERY;
286 break;
287 case Opt_noalign:
288 mp->m_flags |= XFS_MOUNT_NOALIGN;
289 break;
290 case Opt_swalloc:
291 mp->m_flags |= XFS_MOUNT_SWALLOC;
292 break;
293 case Opt_sunit:
294 if (match_int(args, &dsunit))
295 return -EINVAL;
296 break;
297 case Opt_swidth:
298 if (match_int(args, &dswidth))
299 return -EINVAL;
300 break;
301 case Opt_inode32:
302 mp->m_flags |= XFS_MOUNT_SMALL_INUMS;
303 break;
304 case Opt_inode64:
305 mp->m_flags &= ~XFS_MOUNT_SMALL_INUMS;
306 break;
307 case Opt_nouuid:
308 mp->m_flags |= XFS_MOUNT_NOUUID;
309 break;
310 case Opt_ikeep:
311 mp->m_flags |= XFS_MOUNT_IKEEP;
312 break;
313 case Opt_noikeep:
314 mp->m_flags &= ~XFS_MOUNT_IKEEP;
315 break;
316 case Opt_largeio:
317 mp->m_flags &= ~XFS_MOUNT_COMPAT_IOSIZE;
318 break;
319 case Opt_nolargeio:
320 mp->m_flags |= XFS_MOUNT_COMPAT_IOSIZE;
321 break;
322 case Opt_attr2:
323 mp->m_flags |= XFS_MOUNT_ATTR2;
324 break;
325 case Opt_noattr2:
326 mp->m_flags &= ~XFS_MOUNT_ATTR2;
327 mp->m_flags |= XFS_MOUNT_NOATTR2;
328 break;
329 case Opt_filestreams:
330 mp->m_flags |= XFS_MOUNT_FILESTREAMS;
331 break;
332 case Opt_noquota:
333 mp->m_qflags &= ~XFS_ALL_QUOTA_ACCT;
334 mp->m_qflags &= ~XFS_ALL_QUOTA_ENFD;
335 mp->m_qflags &= ~XFS_ALL_QUOTA_ACTIVE;
336 break;
337 case Opt_quota:
338 case Opt_uquota:
339 case Opt_usrquota:
340 mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE |
341 XFS_UQUOTA_ENFD);
342 break;
343 case Opt_qnoenforce:
344 case Opt_uqnoenforce:
345 mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE);
346 mp->m_qflags &= ~XFS_UQUOTA_ENFD;
347 break;
348 case Opt_pquota:
349 case Opt_prjquota:
350 mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE |
351 XFS_PQUOTA_ENFD);
352 break;
353 case Opt_pqnoenforce:
354 mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE);
355 mp->m_qflags &= ~XFS_PQUOTA_ENFD;
356 break;
357 case Opt_gquota:
358 case Opt_grpquota:
359 mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE |
360 XFS_GQUOTA_ENFD);
361 break;
362 case Opt_gqnoenforce:
363 mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE);
364 mp->m_qflags &= ~XFS_GQUOTA_ENFD;
365 break;
366 case Opt_discard:
367 mp->m_flags |= XFS_MOUNT_DISCARD;
368 break;
369 case Opt_nodiscard:
370 mp->m_flags &= ~XFS_MOUNT_DISCARD;
371 break;
372 #ifdef CONFIG_FS_DAX
373 case Opt_dax:
374 mp->m_flags |= XFS_MOUNT_DAX;
375 break;
376 #endif
377 case Opt_barrier:
378 xfs_warn(mp, "%s option is deprecated, ignoring.", p);
379 mp->m_flags |= XFS_MOUNT_BARRIER;
380 break;
381 case Opt_nobarrier:
382 xfs_warn(mp, "%s option is deprecated, ignoring.", p);
383 mp->m_flags &= ~XFS_MOUNT_BARRIER;
384 break;
385 default:
386 xfs_warn(mp, "unknown mount option [%s].", p);
387 return -EINVAL;
388 }
389 }
390
391 /*
392 * no recovery flag requires a read-only mount
393 */
394 if ((mp->m_flags & XFS_MOUNT_NORECOVERY) &&
395 !(mp->m_flags & XFS_MOUNT_RDONLY)) {
396 xfs_warn(mp, "no-recovery mounts must be read-only.");
397 return -EINVAL;
398 }
399
400 if ((mp->m_flags & XFS_MOUNT_NOALIGN) && (dsunit || dswidth)) {
401 xfs_warn(mp,
402 "sunit and swidth options incompatible with the noalign option");
403 return -EINVAL;
404 }
405
406 #ifndef CONFIG_XFS_QUOTA
407 if (XFS_IS_QUOTA_RUNNING(mp)) {
408 xfs_warn(mp, "quota support not available in this kernel.");
409 return -EINVAL;
410 }
411 #endif
412
413 if ((dsunit && !dswidth) || (!dsunit && dswidth)) {
414 xfs_warn(mp, "sunit and swidth must be specified together");
415 return -EINVAL;
416 }
417
418 if (dsunit && (dswidth % dsunit != 0)) {
419 xfs_warn(mp,
420 "stripe width (%d) must be a multiple of the stripe unit (%d)",
421 dswidth, dsunit);
422 return -EINVAL;
423 }
424
425 done:
426 if (dsunit && !(mp->m_flags & XFS_MOUNT_NOALIGN)) {
427 /*
428 * At this point the superblock has not been read
429 * in, therefore we do not know the block size.
430 * Before the mount call ends we will convert
431 * these to FSBs.
432 */
433 mp->m_dalign = dsunit;
434 mp->m_swidth = dswidth;
435 }
436
437 if (mp->m_logbufs != -1 &&
438 mp->m_logbufs != 0 &&
439 (mp->m_logbufs < XLOG_MIN_ICLOGS ||
440 mp->m_logbufs > XLOG_MAX_ICLOGS)) {
441 xfs_warn(mp, "invalid logbufs value: %d [not %d-%d]",
442 mp->m_logbufs, XLOG_MIN_ICLOGS, XLOG_MAX_ICLOGS);
443 return -EINVAL;
444 }
445 if (mp->m_logbsize != -1 &&
446 mp->m_logbsize != 0 &&
447 (mp->m_logbsize < XLOG_MIN_RECORD_BSIZE ||
448 mp->m_logbsize > XLOG_MAX_RECORD_BSIZE ||
449 !is_power_of_2(mp->m_logbsize))) {
450 xfs_warn(mp,
451 "invalid logbufsize: %d [not 16k,32k,64k,128k or 256k]",
452 mp->m_logbsize);
453 return -EINVAL;
454 }
455
456 if (iosizelog) {
457 if (iosizelog > XFS_MAX_IO_LOG ||
458 iosizelog < XFS_MIN_IO_LOG) {
459 xfs_warn(mp, "invalid log iosize: %d [not %d-%d]",
460 iosizelog, XFS_MIN_IO_LOG,
461 XFS_MAX_IO_LOG);
462 return -EINVAL;
463 }
464
465 mp->m_flags |= XFS_MOUNT_DFLT_IOSIZE;
466 mp->m_readio_log = iosizelog;
467 mp->m_writeio_log = iosizelog;
468 }
469
470 return 0;
471 }
472
473 struct proc_xfs_info {
474 uint64_t flag;
475 char *str;
476 };
477
478 STATIC int
479 xfs_showargs(
480 struct xfs_mount *mp,
481 struct seq_file *m)
482 {
483 static struct proc_xfs_info xfs_info_set[] = {
484 /* the few simple ones we can get from the mount struct */
485 { XFS_MOUNT_IKEEP, ",ikeep" },
486 { XFS_MOUNT_WSYNC, ",wsync" },
487 { XFS_MOUNT_NOALIGN, ",noalign" },
488 { XFS_MOUNT_SWALLOC, ",swalloc" },
489 { XFS_MOUNT_NOUUID, ",nouuid" },
490 { XFS_MOUNT_NORECOVERY, ",norecovery" },
491 { XFS_MOUNT_ATTR2, ",attr2" },
492 { XFS_MOUNT_FILESTREAMS, ",filestreams" },
493 { XFS_MOUNT_GRPID, ",grpid" },
494 { XFS_MOUNT_DISCARD, ",discard" },
495 { XFS_MOUNT_SMALL_INUMS, ",inode32" },
496 { XFS_MOUNT_DAX, ",dax" },
497 { 0, NULL }
498 };
499 static struct proc_xfs_info xfs_info_unset[] = {
500 /* the few simple ones we can get from the mount struct */
501 { XFS_MOUNT_COMPAT_IOSIZE, ",largeio" },
502 { XFS_MOUNT_BARRIER, ",nobarrier" },
503 { XFS_MOUNT_SMALL_INUMS, ",inode64" },
504 { 0, NULL }
505 };
506 struct proc_xfs_info *xfs_infop;
507
508 for (xfs_infop = xfs_info_set; xfs_infop->flag; xfs_infop++) {
509 if (mp->m_flags & xfs_infop->flag)
510 seq_puts(m, xfs_infop->str);
511 }
512 for (xfs_infop = xfs_info_unset; xfs_infop->flag; xfs_infop++) {
513 if (!(mp->m_flags & xfs_infop->flag))
514 seq_puts(m, xfs_infop->str);
515 }
516
517 if (mp->m_flags & XFS_MOUNT_DFLT_IOSIZE)
518 seq_printf(m, ",allocsize=%dk",
519 (int)(1 << mp->m_writeio_log) >> 10);
520
521 if (mp->m_logbufs > 0)
522 seq_printf(m, ",logbufs=%d", mp->m_logbufs);
523 if (mp->m_logbsize > 0)
524 seq_printf(m, ",logbsize=%dk", mp->m_logbsize >> 10);
525
526 if (mp->m_logname)
527 seq_show_option(m, "logdev", mp->m_logname);
528 if (mp->m_rtname)
529 seq_show_option(m, "rtdev", mp->m_rtname);
530
531 if (mp->m_dalign > 0)
532 seq_printf(m, ",sunit=%d",
533 (int)XFS_FSB_TO_BB(mp, mp->m_dalign));
534 if (mp->m_swidth > 0)
535 seq_printf(m, ",swidth=%d",
536 (int)XFS_FSB_TO_BB(mp, mp->m_swidth));
537
538 if (mp->m_qflags & (XFS_UQUOTA_ACCT|XFS_UQUOTA_ENFD))
539 seq_puts(m, ",usrquota");
540 else if (mp->m_qflags & XFS_UQUOTA_ACCT)
541 seq_puts(m, ",uqnoenforce");
542
543 if (mp->m_qflags & XFS_PQUOTA_ACCT) {
544 if (mp->m_qflags & XFS_PQUOTA_ENFD)
545 seq_puts(m, ",prjquota");
546 else
547 seq_puts(m, ",pqnoenforce");
548 }
549 if (mp->m_qflags & XFS_GQUOTA_ACCT) {
550 if (mp->m_qflags & XFS_GQUOTA_ENFD)
551 seq_puts(m, ",grpquota");
552 else
553 seq_puts(m, ",gqnoenforce");
554 }
555
556 if (!(mp->m_qflags & XFS_ALL_QUOTA_ACCT))
557 seq_puts(m, ",noquota");
558
559 return 0;
560 }
561 static uint64_t
562 xfs_max_file_offset(
563 unsigned int blockshift)
564 {
565 unsigned int pagefactor = 1;
566 unsigned int bitshift = BITS_PER_LONG - 1;
567
568 /* Figure out maximum filesize, on Linux this can depend on
569 * the filesystem blocksize (on 32 bit platforms).
570 * __block_write_begin does this in an [unsigned] long...
571 * page->index << (PAGE_SHIFT - bbits)
572 * So, for page sized blocks (4K on 32 bit platforms),
573 * this wraps at around 8Tb (hence MAX_LFS_FILESIZE which is
574 * (((u64)PAGE_SIZE << (BITS_PER_LONG-1))-1)
575 * but for smaller blocksizes it is less (bbits = log2 bsize).
576 * Note1: get_block_t takes a long (implicit cast from above)
577 * Note2: The Large Block Device (LBD and HAVE_SECTOR_T) patch
578 * can optionally convert the [unsigned] long from above into
579 * an [unsigned] long long.
580 */
581
582 #if BITS_PER_LONG == 32
583 # if defined(CONFIG_LBDAF)
584 ASSERT(sizeof(sector_t) == 8);
585 pagefactor = PAGE_SIZE;
586 bitshift = BITS_PER_LONG;
587 # else
588 pagefactor = PAGE_SIZE >> (PAGE_SHIFT - blockshift);
589 # endif
590 #endif
591
592 return (((uint64_t)pagefactor) << bitshift) - 1;
593 }
594
595 /*
596 * Set parameters for inode allocation heuristics, taking into account
597 * filesystem size and inode32/inode64 mount options; i.e. specifically
598 * whether or not XFS_MOUNT_SMALL_INUMS is set.
599 *
600 * Inode allocation patterns are altered only if inode32 is requested
601 * (XFS_MOUNT_SMALL_INUMS), and the filesystem is sufficiently large.
602 * If altered, XFS_MOUNT_32BITINODES is set as well.
603 *
604 * An agcount independent of that in the mount structure is provided
605 * because in the growfs case, mp->m_sb.sb_agcount is not yet updated
606 * to the potentially higher ag count.
607 *
608 * Returns the maximum AG index which may contain inodes.
609 */
610 xfs_agnumber_t
611 xfs_set_inode_alloc(
612 struct xfs_mount *mp,
613 xfs_agnumber_t agcount)
614 {
615 xfs_agnumber_t index;
616 xfs_agnumber_t maxagi = 0;
617 xfs_sb_t *sbp = &mp->m_sb;
618 xfs_agnumber_t max_metadata;
619 xfs_agino_t agino;
620 xfs_ino_t ino;
621
622 /*
623 * Calculate how much should be reserved for inodes to meet
624 * the max inode percentage. Used only for inode32.
625 */
626 if (mp->m_maxicount) {
627 uint64_t icount;
628
629 icount = sbp->sb_dblocks * sbp->sb_imax_pct;
630 do_div(icount, 100);
631 icount += sbp->sb_agblocks - 1;
632 do_div(icount, sbp->sb_agblocks);
633 max_metadata = icount;
634 } else {
635 max_metadata = agcount;
636 }
637
638 /* Get the last possible inode in the filesystem */
639 agino = XFS_OFFBNO_TO_AGINO(mp, sbp->sb_agblocks - 1, 0);
640 ino = XFS_AGINO_TO_INO(mp, agcount - 1, agino);
641
642 /*
643 * If user asked for no more than 32-bit inodes, and the fs is
644 * sufficiently large, set XFS_MOUNT_32BITINODES if we must alter
645 * the allocator to accommodate the request.
646 */
647 if ((mp->m_flags & XFS_MOUNT_SMALL_INUMS) && ino > XFS_MAXINUMBER_32)
648 mp->m_flags |= XFS_MOUNT_32BITINODES;
649 else
650 mp->m_flags &= ~XFS_MOUNT_32BITINODES;
651
652 for (index = 0; index < agcount; index++) {
653 struct xfs_perag *pag;
654
655 ino = XFS_AGINO_TO_INO(mp, index, agino);
656
657 pag = xfs_perag_get(mp, index);
658
659 if (mp->m_flags & XFS_MOUNT_32BITINODES) {
660 if (ino > XFS_MAXINUMBER_32) {
661 pag->pagi_inodeok = 0;
662 pag->pagf_metadata = 0;
663 } else {
664 pag->pagi_inodeok = 1;
665 maxagi++;
666 if (index < max_metadata)
667 pag->pagf_metadata = 1;
668 else
669 pag->pagf_metadata = 0;
670 }
671 } else {
672 pag->pagi_inodeok = 1;
673 pag->pagf_metadata = 0;
674 }
675
676 xfs_perag_put(pag);
677 }
678
679 return (mp->m_flags & XFS_MOUNT_32BITINODES) ? maxagi : agcount;
680 }
681
682 STATIC int
683 xfs_blkdev_get(
684 xfs_mount_t *mp,
685 const char *name,
686 struct block_device **bdevp)
687 {
688 int error = 0;
689
690 *bdevp = blkdev_get_by_path(name, FMODE_READ|FMODE_WRITE|FMODE_EXCL,
691 mp);
692 if (IS_ERR(*bdevp)) {
693 error = PTR_ERR(*bdevp);
694 xfs_warn(mp, "Invalid device [%s], error=%d", name, error);
695 }
696
697 return error;
698 }
699
700 STATIC void
701 xfs_blkdev_put(
702 struct block_device *bdev)
703 {
704 if (bdev)
705 blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL);
706 }
707
708 void
709 xfs_blkdev_issue_flush(
710 xfs_buftarg_t *buftarg)
711 {
712 blkdev_issue_flush(buftarg->bt_bdev, GFP_NOFS, NULL);
713 }
714
715 STATIC void
716 xfs_close_devices(
717 struct xfs_mount *mp)
718 {
719 struct dax_device *dax_ddev = mp->m_ddev_targp->bt_daxdev;
720
721 if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp) {
722 struct block_device *logdev = mp->m_logdev_targp->bt_bdev;
723 struct dax_device *dax_logdev = mp->m_logdev_targp->bt_daxdev;
724
725 xfs_free_buftarg(mp->m_logdev_targp);
726 xfs_blkdev_put(logdev);
727 fs_put_dax(dax_logdev);
728 }
729 if (mp->m_rtdev_targp) {
730 struct block_device *rtdev = mp->m_rtdev_targp->bt_bdev;
731 struct dax_device *dax_rtdev = mp->m_rtdev_targp->bt_daxdev;
732
733 xfs_free_buftarg(mp->m_rtdev_targp);
734 xfs_blkdev_put(rtdev);
735 fs_put_dax(dax_rtdev);
736 }
737 xfs_free_buftarg(mp->m_ddev_targp);
738 fs_put_dax(dax_ddev);
739 }
740
741 /*
742 * The file system configurations are:
743 * (1) device (partition) with data and internal log
744 * (2) logical volume with data and log subvolumes.
745 * (3) logical volume with data, log, and realtime subvolumes.
746 *
747 * We only have to handle opening the log and realtime volumes here if
748 * they are present. The data subvolume has already been opened by
749 * get_sb_bdev() and is stored in sb->s_bdev.
750 */
751 STATIC int
752 xfs_open_devices(
753 struct xfs_mount *mp)
754 {
755 struct block_device *ddev = mp->m_super->s_bdev;
756 struct dax_device *dax_ddev = fs_dax_get_by_bdev(ddev);
757 struct dax_device *dax_logdev = NULL, *dax_rtdev = NULL;
758 struct block_device *logdev = NULL, *rtdev = NULL;
759 int error;
760
761 /*
762 * Open real time and log devices - order is important.
763 */
764 if (mp->m_logname) {
765 error = xfs_blkdev_get(mp, mp->m_logname, &logdev);
766 if (error)
767 goto out;
768 dax_logdev = fs_dax_get_by_bdev(logdev);
769 }
770
771 if (mp->m_rtname) {
772 error = xfs_blkdev_get(mp, mp->m_rtname, &rtdev);
773 if (error)
774 goto out_close_logdev;
775
776 if (rtdev == ddev || rtdev == logdev) {
777 xfs_warn(mp,
778 "Cannot mount filesystem with identical rtdev and ddev/logdev.");
779 error = -EINVAL;
780 goto out_close_rtdev;
781 }
782 dax_rtdev = fs_dax_get_by_bdev(rtdev);
783 }
784
785 /*
786 * Setup xfs_mount buffer target pointers
787 */
788 error = -ENOMEM;
789 mp->m_ddev_targp = xfs_alloc_buftarg(mp, ddev, dax_ddev);
790 if (!mp->m_ddev_targp)
791 goto out_close_rtdev;
792
793 if (rtdev) {
794 mp->m_rtdev_targp = xfs_alloc_buftarg(mp, rtdev, dax_rtdev);
795 if (!mp->m_rtdev_targp)
796 goto out_free_ddev_targ;
797 }
798
799 if (logdev && logdev != ddev) {
800 mp->m_logdev_targp = xfs_alloc_buftarg(mp, logdev, dax_logdev);
801 if (!mp->m_logdev_targp)
802 goto out_free_rtdev_targ;
803 } else {
804 mp->m_logdev_targp = mp->m_ddev_targp;
805 }
806
807 return 0;
808
809 out_free_rtdev_targ:
810 if (mp->m_rtdev_targp)
811 xfs_free_buftarg(mp->m_rtdev_targp);
812 out_free_ddev_targ:
813 xfs_free_buftarg(mp->m_ddev_targp);
814 out_close_rtdev:
815 xfs_blkdev_put(rtdev);
816 fs_put_dax(dax_rtdev);
817 out_close_logdev:
818 if (logdev && logdev != ddev) {
819 xfs_blkdev_put(logdev);
820 fs_put_dax(dax_logdev);
821 }
822 out:
823 fs_put_dax(dax_ddev);
824 return error;
825 }
826
827 /*
828 * Setup xfs_mount buffer target pointers based on superblock
829 */
830 STATIC int
831 xfs_setup_devices(
832 struct xfs_mount *mp)
833 {
834 int error;
835
836 error = xfs_setsize_buftarg(mp->m_ddev_targp, mp->m_sb.sb_sectsize);
837 if (error)
838 return error;
839
840 if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp) {
841 unsigned int log_sector_size = BBSIZE;
842
843 if (xfs_sb_version_hassector(&mp->m_sb))
844 log_sector_size = mp->m_sb.sb_logsectsize;
845 error = xfs_setsize_buftarg(mp->m_logdev_targp,
846 log_sector_size);
847 if (error)
848 return error;
849 }
850 if (mp->m_rtdev_targp) {
851 error = xfs_setsize_buftarg(mp->m_rtdev_targp,
852 mp->m_sb.sb_sectsize);
853 if (error)
854 return error;
855 }
856
857 return 0;
858 }
859
860 STATIC int
861 xfs_init_mount_workqueues(
862 struct xfs_mount *mp)
863 {
864 mp->m_buf_workqueue = alloc_workqueue("xfs-buf/%s",
865 WQ_MEM_RECLAIM|WQ_FREEZABLE, 1, mp->m_fsname);
866 if (!mp->m_buf_workqueue)
867 goto out;
868
869 mp->m_data_workqueue = alloc_workqueue("xfs-data/%s",
870 WQ_MEM_RECLAIM|WQ_FREEZABLE, 0, mp->m_fsname);
871 if (!mp->m_data_workqueue)
872 goto out_destroy_buf;
873
874 mp->m_unwritten_workqueue = alloc_workqueue("xfs-conv/%s",
875 WQ_MEM_RECLAIM|WQ_FREEZABLE, 0, mp->m_fsname);
876 if (!mp->m_unwritten_workqueue)
877 goto out_destroy_data_iodone_queue;
878
879 mp->m_cil_workqueue = alloc_workqueue("xfs-cil/%s",
880 WQ_MEM_RECLAIM|WQ_FREEZABLE, 0, mp->m_fsname);
881 if (!mp->m_cil_workqueue)
882 goto out_destroy_unwritten;
883
884 mp->m_reclaim_workqueue = alloc_workqueue("xfs-reclaim/%s",
885 WQ_MEM_RECLAIM|WQ_FREEZABLE, 0, mp->m_fsname);
886 if (!mp->m_reclaim_workqueue)
887 goto out_destroy_cil;
888
889 mp->m_log_workqueue = alloc_workqueue("xfs-log/%s",
890 WQ_MEM_RECLAIM|WQ_FREEZABLE|WQ_HIGHPRI, 0,
891 mp->m_fsname);
892 if (!mp->m_log_workqueue)
893 goto out_destroy_reclaim;
894
895 mp->m_eofblocks_workqueue = alloc_workqueue("xfs-eofblocks/%s",
896 WQ_MEM_RECLAIM|WQ_FREEZABLE, 0, mp->m_fsname);
897 if (!mp->m_eofblocks_workqueue)
898 goto out_destroy_log;
899
900 mp->m_sync_workqueue = alloc_workqueue("xfs-sync/%s", WQ_FREEZABLE, 0,
901 mp->m_fsname);
902 if (!mp->m_sync_workqueue)
903 goto out_destroy_eofb;
904
905 return 0;
906
907 out_destroy_eofb:
908 destroy_workqueue(mp->m_eofblocks_workqueue);
909 out_destroy_log:
910 destroy_workqueue(mp->m_log_workqueue);
911 out_destroy_reclaim:
912 destroy_workqueue(mp->m_reclaim_workqueue);
913 out_destroy_cil:
914 destroy_workqueue(mp->m_cil_workqueue);
915 out_destroy_unwritten:
916 destroy_workqueue(mp->m_unwritten_workqueue);
917 out_destroy_data_iodone_queue:
918 destroy_workqueue(mp->m_data_workqueue);
919 out_destroy_buf:
920 destroy_workqueue(mp->m_buf_workqueue);
921 out:
922 return -ENOMEM;
923 }
924
925 STATIC void
926 xfs_destroy_mount_workqueues(
927 struct xfs_mount *mp)
928 {
929 destroy_workqueue(mp->m_sync_workqueue);
930 destroy_workqueue(mp->m_eofblocks_workqueue);
931 destroy_workqueue(mp->m_log_workqueue);
932 destroy_workqueue(mp->m_reclaim_workqueue);
933 destroy_workqueue(mp->m_cil_workqueue);
934 destroy_workqueue(mp->m_data_workqueue);
935 destroy_workqueue(mp->m_unwritten_workqueue);
936 destroy_workqueue(mp->m_buf_workqueue);
937 }
938
939 /*
940 * Flush all dirty data to disk. Must not be called while holding an XFS_ILOCK
941 * or a page lock. We use sync_inodes_sb() here to ensure we block while waiting
942 * for IO to complete so that we effectively throttle multiple callers to the
943 * rate at which IO is completing.
944 */
945 void
946 xfs_flush_inodes(
947 struct xfs_mount *mp)
948 {
949 struct super_block *sb = mp->m_super;
950
951 if (down_read_trylock(&sb->s_umount)) {
952 sync_inodes_sb(sb);
953 up_read(&sb->s_umount);
954 }
955 }
956
957 /* Catch misguided souls that try to use this interface on XFS */
958 STATIC struct inode *
959 xfs_fs_alloc_inode(
960 struct super_block *sb)
961 {
962 BUG();
963 return NULL;
964 }
965
966 /*
967 * Now that the generic code is guaranteed not to be accessing
968 * the linux inode, we can inactivate and reclaim the inode.
969 */
970 STATIC void
971 xfs_fs_destroy_inode(
972 struct inode *inode)
973 {
974 struct xfs_inode *ip = XFS_I(inode);
975
976 trace_xfs_destroy_inode(ip);
977
978 ASSERT(!rwsem_is_locked(&inode->i_rwsem));
979 XFS_STATS_INC(ip->i_mount, vn_rele);
980 XFS_STATS_INC(ip->i_mount, vn_remove);
981
982 xfs_inactive(ip);
983
984 ASSERT(XFS_FORCED_SHUTDOWN(ip->i_mount) || ip->i_delayed_blks == 0);
985 XFS_STATS_INC(ip->i_mount, vn_reclaim);
986
987 /*
988 * We should never get here with one of the reclaim flags already set.
989 */
990 ASSERT_ALWAYS(!xfs_iflags_test(ip, XFS_IRECLAIMABLE));
991 ASSERT_ALWAYS(!xfs_iflags_test(ip, XFS_IRECLAIM));
992
993 /*
994 * We always use background reclaim here because even if the
995 * inode is clean, it still may be under IO and hence we have
996 * to take the flush lock. The background reclaim path handles
997 * this more efficiently than we can here, so simply let background
998 * reclaim tear down all inodes.
999 */
1000 xfs_inode_set_reclaim_tag(ip);
1001 }
1002
1003 static void
1004 xfs_fs_dirty_inode(
1005 struct inode *inode,
1006 int flag)
1007 {
1008 struct xfs_inode *ip = XFS_I(inode);
1009 struct xfs_mount *mp = ip->i_mount;
1010 struct xfs_trans *tp;
1011
1012 if (!(inode->i_sb->s_flags & SB_LAZYTIME))
1013 return;
1014 if (flag != I_DIRTY_SYNC || !(inode->i_state & I_DIRTY_TIME))
1015 return;
1016
1017 if (xfs_trans_alloc(mp, &M_RES(mp)->tr_fsyncts, 0, 0, 0, &tp))
1018 return;
1019 xfs_ilock(ip, XFS_ILOCK_EXCL);
1020 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
1021 xfs_trans_log_inode(tp, ip, XFS_ILOG_TIMESTAMP);
1022 xfs_trans_commit(tp);
1023 }
1024
1025 /*
1026 * Slab object creation initialisation for the XFS inode.
1027 * This covers only the idempotent fields in the XFS inode;
1028 * all other fields need to be initialised on allocation
1029 * from the slab. This avoids the need to repeatedly initialise
1030 * fields in the xfs inode that left in the initialise state
1031 * when freeing the inode.
1032 */
1033 STATIC void
1034 xfs_fs_inode_init_once(
1035 void *inode)
1036 {
1037 struct xfs_inode *ip = inode;
1038
1039 memset(ip, 0, sizeof(struct xfs_inode));
1040
1041 /* vfs inode */
1042 inode_init_once(VFS_I(ip));
1043
1044 /* xfs inode */
1045 atomic_set(&ip->i_pincount, 0);
1046 spin_lock_init(&ip->i_flags_lock);
1047
1048 mrlock_init(&ip->i_mmaplock, MRLOCK_ALLOW_EQUAL_PRI|MRLOCK_BARRIER,
1049 "xfsino", ip->i_ino);
1050 mrlock_init(&ip->i_lock, MRLOCK_ALLOW_EQUAL_PRI|MRLOCK_BARRIER,
1051 "xfsino", ip->i_ino);
1052 }
1053
1054 /*
1055 * We do an unlocked check for XFS_IDONTCACHE here because we are already
1056 * serialised against cache hits here via the inode->i_lock and igrab() in
1057 * xfs_iget_cache_hit(). Hence a lookup that might clear this flag will not be
1058 * racing with us, and it avoids needing to grab a spinlock here for every inode
1059 * we drop the final reference on.
1060 */
1061 STATIC int
1062 xfs_fs_drop_inode(
1063 struct inode *inode)
1064 {
1065 struct xfs_inode *ip = XFS_I(inode);
1066
1067 /*
1068 * If this unlinked inode is in the middle of recovery, don't
1069 * drop the inode just yet; log recovery will take care of
1070 * that. See the comment for this inode flag.
1071 */
1072 if (ip->i_flags & XFS_IRECOVERY) {
1073 ASSERT(ip->i_mount->m_log->l_flags & XLOG_RECOVERY_NEEDED);
1074 return 0;
1075 }
1076
1077 return generic_drop_inode(inode) || (ip->i_flags & XFS_IDONTCACHE);
1078 }
1079
1080 STATIC void
1081 xfs_free_fsname(
1082 struct xfs_mount *mp)
1083 {
1084 kfree(mp->m_fsname);
1085 kfree(mp->m_rtname);
1086 kfree(mp->m_logname);
1087 }
1088
1089 STATIC int
1090 xfs_fs_sync_fs(
1091 struct super_block *sb,
1092 int wait)
1093 {
1094 struct xfs_mount *mp = XFS_M(sb);
1095
1096 /*
1097 * Doing anything during the async pass would be counterproductive.
1098 */
1099 if (!wait)
1100 return 0;
1101
1102 xfs_log_force(mp, XFS_LOG_SYNC);
1103 if (laptop_mode) {
1104 /*
1105 * The disk must be active because we're syncing.
1106 * We schedule log work now (now that the disk is
1107 * active) instead of later (when it might not be).
1108 */
1109 flush_delayed_work(&mp->m_log->l_work);
1110 }
1111
1112 return 0;
1113 }
1114
1115 STATIC int
1116 xfs_fs_statfs(
1117 struct dentry *dentry,
1118 struct kstatfs *statp)
1119 {
1120 struct xfs_mount *mp = XFS_M(dentry->d_sb);
1121 xfs_sb_t *sbp = &mp->m_sb;
1122 struct xfs_inode *ip = XFS_I(d_inode(dentry));
1123 uint64_t fakeinos, id;
1124 uint64_t icount;
1125 uint64_t ifree;
1126 uint64_t fdblocks;
1127 xfs_extlen_t lsize;
1128 int64_t ffree;
1129
1130 statp->f_type = XFS_SB_MAGIC;
1131 statp->f_namelen = MAXNAMELEN - 1;
1132
1133 id = huge_encode_dev(mp->m_ddev_targp->bt_dev);
1134 statp->f_fsid.val[0] = (u32)id;
1135 statp->f_fsid.val[1] = (u32)(id >> 32);
1136
1137 icount = percpu_counter_sum(&mp->m_icount);
1138 ifree = percpu_counter_sum(&mp->m_ifree);
1139 fdblocks = percpu_counter_sum(&mp->m_fdblocks);
1140
1141 spin_lock(&mp->m_sb_lock);
1142 statp->f_bsize = sbp->sb_blocksize;
1143 lsize = sbp->sb_logstart ? sbp->sb_logblocks : 0;
1144 statp->f_blocks = sbp->sb_dblocks - lsize;
1145 spin_unlock(&mp->m_sb_lock);
1146
1147 statp->f_bfree = fdblocks - mp->m_alloc_set_aside;
1148 statp->f_bavail = statp->f_bfree;
1149
1150 fakeinos = statp->f_bfree << sbp->sb_inopblog;
1151 statp->f_files = MIN(icount + fakeinos, (uint64_t)XFS_MAXINUMBER);
1152 if (mp->m_maxicount)
1153 statp->f_files = min_t(typeof(statp->f_files),
1154 statp->f_files,
1155 mp->m_maxicount);
1156
1157 /* If sb_icount overshot maxicount, report actual allocation */
1158 statp->f_files = max_t(typeof(statp->f_files),
1159 statp->f_files,
1160 sbp->sb_icount);
1161
1162 /* make sure statp->f_ffree does not underflow */
1163 ffree = statp->f_files - (icount - ifree);
1164 statp->f_ffree = max_t(int64_t, ffree, 0);
1165
1166
1167 if ((ip->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) &&
1168 ((mp->m_qflags & (XFS_PQUOTA_ACCT|XFS_PQUOTA_ENFD))) ==
1169 (XFS_PQUOTA_ACCT|XFS_PQUOTA_ENFD))
1170 xfs_qm_statvfs(ip, statp);
1171
1172 if (XFS_IS_REALTIME_MOUNT(mp) &&
1173 (ip->i_d.di_flags & (XFS_DIFLAG_RTINHERIT | XFS_DIFLAG_REALTIME))) {
1174 statp->f_blocks = sbp->sb_rblocks;
1175 statp->f_bavail = statp->f_bfree =
1176 sbp->sb_frextents * sbp->sb_rextsize;
1177 }
1178
1179 return 0;
1180 }
1181
1182 STATIC void
1183 xfs_save_resvblks(struct xfs_mount *mp)
1184 {
1185 uint64_t resblks = 0;
1186
1187 mp->m_resblks_save = mp->m_resblks;
1188 xfs_reserve_blocks(mp, &resblks, NULL);
1189 }
1190
1191 STATIC void
1192 xfs_restore_resvblks(struct xfs_mount *mp)
1193 {
1194 uint64_t resblks;
1195
1196 if (mp->m_resblks_save) {
1197 resblks = mp->m_resblks_save;
1198 mp->m_resblks_save = 0;
1199 } else
1200 resblks = xfs_default_resblks(mp);
1201
1202 xfs_reserve_blocks(mp, &resblks, NULL);
1203 }
1204
1205 /*
1206 * Trigger writeback of all the dirty metadata in the file system.
1207 *
1208 * This ensures that the metadata is written to their location on disk rather
1209 * than just existing in transactions in the log. This means after a quiesce
1210 * there is no log replay required to write the inodes to disk - this is the
1211 * primary difference between a sync and a quiesce.
1212 *
1213 * Note: xfs_log_quiesce() stops background log work - the callers must ensure
1214 * it is started again when appropriate.
1215 */
1216 void
1217 xfs_quiesce_attr(
1218 struct xfs_mount *mp)
1219 {
1220 int error = 0;
1221
1222 /* wait for all modifications to complete */
1223 while (atomic_read(&mp->m_active_trans) > 0)
1224 delay(100);
1225
1226 /* force the log to unpin objects from the now complete transactions */
1227 xfs_log_force(mp, XFS_LOG_SYNC);
1228
1229 /* reclaim inodes to do any IO before the freeze completes */
1230 xfs_reclaim_inodes(mp, 0);
1231 xfs_reclaim_inodes(mp, SYNC_WAIT);
1232
1233 /* Push the superblock and write an unmount record */
1234 error = xfs_log_sbcount(mp);
1235 if (error)
1236 xfs_warn(mp, "xfs_attr_quiesce: failed to log sb changes. "
1237 "Frozen image may not be consistent.");
1238 /*
1239 * Just warn here till VFS can correctly support
1240 * read-only remount without racing.
1241 */
1242 WARN_ON(atomic_read(&mp->m_active_trans) != 0);
1243
1244 xfs_log_quiesce(mp);
1245 }
1246
1247 STATIC int
1248 xfs_test_remount_options(
1249 struct super_block *sb,
1250 char *options)
1251 {
1252 int error = 0;
1253 struct xfs_mount *tmp_mp;
1254
1255 tmp_mp = kmem_zalloc(sizeof(*tmp_mp), KM_MAYFAIL);
1256 if (!tmp_mp)
1257 return -ENOMEM;
1258
1259 tmp_mp->m_super = sb;
1260 error = xfs_parseargs(tmp_mp, options);
1261 xfs_free_fsname(tmp_mp);
1262 kmem_free(tmp_mp);
1263
1264 return error;
1265 }
1266
1267 STATIC int
1268 xfs_fs_remount(
1269 struct super_block *sb,
1270 int *flags,
1271 char *options)
1272 {
1273 struct xfs_mount *mp = XFS_M(sb);
1274 xfs_sb_t *sbp = &mp->m_sb;
1275 substring_t args[MAX_OPT_ARGS];
1276 char *p;
1277 int error;
1278
1279 /* First, check for complete junk; i.e. invalid options */
1280 error = xfs_test_remount_options(sb, options);
1281 if (error)
1282 return error;
1283
1284 sync_filesystem(sb);
1285 while ((p = strsep(&options, ",")) != NULL) {
1286 int token;
1287
1288 if (!*p)
1289 continue;
1290
1291 token = match_token(p, tokens, args);
1292 switch (token) {
1293 case Opt_barrier:
1294 xfs_warn(mp, "%s option is deprecated, ignoring.", p);
1295 mp->m_flags |= XFS_MOUNT_BARRIER;
1296 break;
1297 case Opt_nobarrier:
1298 xfs_warn(mp, "%s option is deprecated, ignoring.", p);
1299 mp->m_flags &= ~XFS_MOUNT_BARRIER;
1300 break;
1301 case Opt_inode64:
1302 mp->m_flags &= ~XFS_MOUNT_SMALL_INUMS;
1303 mp->m_maxagi = xfs_set_inode_alloc(mp, sbp->sb_agcount);
1304 break;
1305 case Opt_inode32:
1306 mp->m_flags |= XFS_MOUNT_SMALL_INUMS;
1307 mp->m_maxagi = xfs_set_inode_alloc(mp, sbp->sb_agcount);
1308 break;
1309 default:
1310 /*
1311 * Logically we would return an error here to prevent
1312 * users from believing they might have changed
1313 * mount options using remount which can't be changed.
1314 *
1315 * But unfortunately mount(8) adds all options from
1316 * mtab and fstab to the mount arguments in some cases
1317 * so we can't blindly reject options, but have to
1318 * check for each specified option if it actually
1319 * differs from the currently set option and only
1320 * reject it if that's the case.
1321 *
1322 * Until that is implemented we return success for
1323 * every remount request, and silently ignore all
1324 * options that we can't actually change.
1325 */
1326 #if 0
1327 xfs_info(mp,
1328 "mount option \"%s\" not supported for remount", p);
1329 return -EINVAL;
1330 #else
1331 break;
1332 #endif
1333 }
1334 }
1335
1336 /* ro -> rw */
1337 if ((mp->m_flags & XFS_MOUNT_RDONLY) && !(*flags & SB_RDONLY)) {
1338 if (mp->m_flags & XFS_MOUNT_NORECOVERY) {
1339 xfs_warn(mp,
1340 "ro->rw transition prohibited on norecovery mount");
1341 return -EINVAL;
1342 }
1343
1344 if (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5 &&
1345 xfs_sb_has_ro_compat_feature(sbp,
1346 XFS_SB_FEAT_RO_COMPAT_UNKNOWN)) {
1347 xfs_warn(mp,
1348 "ro->rw transition prohibited on unknown (0x%x) ro-compat filesystem",
1349 (sbp->sb_features_ro_compat &
1350 XFS_SB_FEAT_RO_COMPAT_UNKNOWN));
1351 return -EINVAL;
1352 }
1353
1354 mp->m_flags &= ~XFS_MOUNT_RDONLY;
1355
1356 /*
1357 * If this is the first remount to writeable state we
1358 * might have some superblock changes to update.
1359 */
1360 if (mp->m_update_sb) {
1361 error = xfs_sync_sb(mp, false);
1362 if (error) {
1363 xfs_warn(mp, "failed to write sb changes");
1364 return error;
1365 }
1366 mp->m_update_sb = false;
1367 }
1368
1369 /*
1370 * Fill out the reserve pool if it is empty. Use the stashed
1371 * value if it is non-zero, otherwise go with the default.
1372 */
1373 xfs_restore_resvblks(mp);
1374 xfs_log_work_queue(mp);
1375 xfs_queue_eofblocks(mp);
1376
1377 /* Recover any CoW blocks that never got remapped. */
1378 error = xfs_reflink_recover_cow(mp);
1379 if (error) {
1380 xfs_err(mp,
1381 "Error %d recovering leftover CoW allocations.", error);
1382 xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE);
1383 return error;
1384 }
1385 xfs_queue_cowblocks(mp);
1386
1387 /* Create the per-AG metadata reservation pool .*/
1388 error = xfs_fs_reserve_ag_blocks(mp);
1389 if (error && error != -ENOSPC)
1390 return error;
1391 }
1392
1393 /* rw -> ro */
1394 if (!(mp->m_flags & XFS_MOUNT_RDONLY) && (*flags & SB_RDONLY)) {
1395 /* Get rid of any leftover CoW reservations... */
1396 cancel_delayed_work_sync(&mp->m_cowblocks_work);
1397 error = xfs_icache_free_cowblocks(mp, NULL);
1398 if (error) {
1399 xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE);
1400 return error;
1401 }
1402
1403 /* Free the per-AG metadata reservation pool. */
1404 error = xfs_fs_unreserve_ag_blocks(mp);
1405 if (error) {
1406 xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE);
1407 return error;
1408 }
1409
1410 /*
1411 * Before we sync the metadata, we need to free up the reserve
1412 * block pool so that the used block count in the superblock on
1413 * disk is correct at the end of the remount. Stash the current
1414 * reserve pool size so that if we get remounted rw, we can
1415 * return it to the same size.
1416 */
1417 xfs_save_resvblks(mp);
1418
1419 /*
1420 * Cancel background eofb scanning so it cannot race with the
1421 * final log force+buftarg wait and deadlock the remount.
1422 */
1423 cancel_delayed_work_sync(&mp->m_eofblocks_work);
1424
1425 xfs_quiesce_attr(mp);
1426 mp->m_flags |= XFS_MOUNT_RDONLY;
1427 }
1428
1429 return 0;
1430 }
1431
1432 /*
1433 * Second stage of a freeze. The data is already frozen so we only
1434 * need to take care of the metadata. Once that's done sync the superblock
1435 * to the log to dirty it in case of a crash while frozen. This ensures that we
1436 * will recover the unlinked inode lists on the next mount.
1437 */
1438 STATIC int
1439 xfs_fs_freeze(
1440 struct super_block *sb)
1441 {
1442 struct xfs_mount *mp = XFS_M(sb);
1443
1444 xfs_save_resvblks(mp);
1445 xfs_quiesce_attr(mp);
1446 return xfs_sync_sb(mp, true);
1447 }
1448
1449 STATIC int
1450 xfs_fs_unfreeze(
1451 struct super_block *sb)
1452 {
1453 struct xfs_mount *mp = XFS_M(sb);
1454
1455 xfs_restore_resvblks(mp);
1456 xfs_log_work_queue(mp);
1457 return 0;
1458 }
1459
1460 STATIC int
1461 xfs_fs_show_options(
1462 struct seq_file *m,
1463 struct dentry *root)
1464 {
1465 return xfs_showargs(XFS_M(root->d_sb), m);
1466 }
1467
1468 /*
1469 * This function fills in xfs_mount_t fields based on mount args.
1470 * Note: the superblock _has_ now been read in.
1471 */
1472 STATIC int
1473 xfs_finish_flags(
1474 struct xfs_mount *mp)
1475 {
1476 int ronly = (mp->m_flags & XFS_MOUNT_RDONLY);
1477
1478 /* Fail a mount where the logbuf is smaller than the log stripe */
1479 if (xfs_sb_version_haslogv2(&mp->m_sb)) {
1480 if (mp->m_logbsize <= 0 &&
1481 mp->m_sb.sb_logsunit > XLOG_BIG_RECORD_BSIZE) {
1482 mp->m_logbsize = mp->m_sb.sb_logsunit;
1483 } else if (mp->m_logbsize > 0 &&
1484 mp->m_logbsize < mp->m_sb.sb_logsunit) {
1485 xfs_warn(mp,
1486 "logbuf size must be greater than or equal to log stripe size");
1487 return -EINVAL;
1488 }
1489 } else {
1490 /* Fail a mount if the logbuf is larger than 32K */
1491 if (mp->m_logbsize > XLOG_BIG_RECORD_BSIZE) {
1492 xfs_warn(mp,
1493 "logbuf size for version 1 logs must be 16K or 32K");
1494 return -EINVAL;
1495 }
1496 }
1497
1498 /*
1499 * V5 filesystems always use attr2 format for attributes.
1500 */
1501 if (xfs_sb_version_hascrc(&mp->m_sb) &&
1502 (mp->m_flags & XFS_MOUNT_NOATTR2)) {
1503 xfs_warn(mp, "Cannot mount a V5 filesystem as noattr2. "
1504 "attr2 is always enabled for V5 filesystems.");
1505 return -EINVAL;
1506 }
1507
1508 /*
1509 * mkfs'ed attr2 will turn on attr2 mount unless explicitly
1510 * told by noattr2 to turn it off
1511 */
1512 if (xfs_sb_version_hasattr2(&mp->m_sb) &&
1513 !(mp->m_flags & XFS_MOUNT_NOATTR2))
1514 mp->m_flags |= XFS_MOUNT_ATTR2;
1515
1516 /*
1517 * prohibit r/w mounts of read-only filesystems
1518 */
1519 if ((mp->m_sb.sb_flags & XFS_SBF_READONLY) && !ronly) {
1520 xfs_warn(mp,
1521 "cannot mount a read-only filesystem as read-write");
1522 return -EROFS;
1523 }
1524
1525 if ((mp->m_qflags & (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE)) &&
1526 (mp->m_qflags & (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE)) &&
1527 !xfs_sb_version_has_pquotino(&mp->m_sb)) {
1528 xfs_warn(mp,
1529 "Super block does not support project and group quota together");
1530 return -EINVAL;
1531 }
1532
1533 return 0;
1534 }
1535
1536 static int
1537 xfs_init_percpu_counters(
1538 struct xfs_mount *mp)
1539 {
1540 int error;
1541
1542 error = percpu_counter_init(&mp->m_icount, 0, GFP_KERNEL);
1543 if (error)
1544 return -ENOMEM;
1545
1546 error = percpu_counter_init(&mp->m_ifree, 0, GFP_KERNEL);
1547 if (error)
1548 goto free_icount;
1549
1550 error = percpu_counter_init(&mp->m_fdblocks, 0, GFP_KERNEL);
1551 if (error)
1552 goto free_ifree;
1553
1554 return 0;
1555
1556 free_ifree:
1557 percpu_counter_destroy(&mp->m_ifree);
1558 free_icount:
1559 percpu_counter_destroy(&mp->m_icount);
1560 return -ENOMEM;
1561 }
1562
1563 void
1564 xfs_reinit_percpu_counters(
1565 struct xfs_mount *mp)
1566 {
1567 percpu_counter_set(&mp->m_icount, mp->m_sb.sb_icount);
1568 percpu_counter_set(&mp->m_ifree, mp->m_sb.sb_ifree);
1569 percpu_counter_set(&mp->m_fdblocks, mp->m_sb.sb_fdblocks);
1570 }
1571
1572 static void
1573 xfs_destroy_percpu_counters(
1574 struct xfs_mount *mp)
1575 {
1576 percpu_counter_destroy(&mp->m_icount);
1577 percpu_counter_destroy(&mp->m_ifree);
1578 percpu_counter_destroy(&mp->m_fdblocks);
1579 }
1580
1581 static struct xfs_mount *
1582 xfs_mount_alloc(
1583 struct super_block *sb)
1584 {
1585 struct xfs_mount *mp;
1586
1587 mp = kzalloc(sizeof(struct xfs_mount), GFP_KERNEL);
1588 if (!mp)
1589 return NULL;
1590
1591 mp->m_super = sb;
1592 spin_lock_init(&mp->m_sb_lock);
1593 spin_lock_init(&mp->m_agirotor_lock);
1594 INIT_RADIX_TREE(&mp->m_perag_tree, GFP_ATOMIC);
1595 spin_lock_init(&mp->m_perag_lock);
1596 mutex_init(&mp->m_growlock);
1597 atomic_set(&mp->m_active_trans, 0);
1598 INIT_DELAYED_WORK(&mp->m_reclaim_work, xfs_reclaim_worker);
1599 INIT_DELAYED_WORK(&mp->m_eofblocks_work, xfs_eofblocks_worker);
1600 INIT_DELAYED_WORK(&mp->m_cowblocks_work, xfs_cowblocks_worker);
1601 mp->m_kobj.kobject.kset = xfs_kset;
1602 return mp;
1603 }
1604
1605
1606 STATIC int
1607 xfs_fs_fill_super(
1608 struct super_block *sb,
1609 void *data,
1610 int silent)
1611 {
1612 struct inode *root;
1613 struct xfs_mount *mp = NULL;
1614 int flags = 0, error = -ENOMEM;
1615
1616 /*
1617 * allocate mp and do all low-level struct initializations before we
1618 * attach it to the super
1619 */
1620 mp = xfs_mount_alloc(sb);
1621 if (!mp)
1622 goto out;
1623 sb->s_fs_info = mp;
1624
1625 error = xfs_parseargs(mp, (char *)data);
1626 if (error)
1627 goto out_free_fsname;
1628
1629 sb_min_blocksize(sb, BBSIZE);
1630 sb->s_xattr = xfs_xattr_handlers;
1631 sb->s_export_op = &xfs_export_operations;
1632 #ifdef CONFIG_XFS_QUOTA
1633 sb->s_qcop = &xfs_quotactl_operations;
1634 sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP | QTYPE_MASK_PRJ;
1635 #endif
1636 sb->s_op = &xfs_super_operations;
1637
1638 if (silent)
1639 flags |= XFS_MFSI_QUIET;
1640
1641 error = xfs_open_devices(mp);
1642 if (error)
1643 goto out_free_fsname;
1644
1645 error = xfs_init_mount_workqueues(mp);
1646 if (error)
1647 goto out_close_devices;
1648
1649 error = xfs_init_percpu_counters(mp);
1650 if (error)
1651 goto out_destroy_workqueues;
1652
1653 /* Allocate stats memory before we do operations that might use it */
1654 mp->m_stats.xs_stats = alloc_percpu(struct xfsstats);
1655 if (!mp->m_stats.xs_stats) {
1656 error = -ENOMEM;
1657 goto out_destroy_counters;
1658 }
1659
1660 error = xfs_readsb(mp, flags);
1661 if (error)
1662 goto out_free_stats;
1663
1664 error = xfs_finish_flags(mp);
1665 if (error)
1666 goto out_free_sb;
1667
1668 error = xfs_setup_devices(mp);
1669 if (error)
1670 goto out_free_sb;
1671
1672 error = xfs_filestream_mount(mp);
1673 if (error)
1674 goto out_free_sb;
1675
1676 /*
1677 * we must configure the block size in the superblock before we run the
1678 * full mount process as the mount process can lookup and cache inodes.
1679 */
1680 sb->s_magic = XFS_SB_MAGIC;
1681 sb->s_blocksize = mp->m_sb.sb_blocksize;
1682 sb->s_blocksize_bits = ffs(sb->s_blocksize) - 1;
1683 sb->s_maxbytes = xfs_max_file_offset(sb->s_blocksize_bits);
1684 sb->s_max_links = XFS_MAXLINK;
1685 sb->s_time_gran = 1;
1686 set_posix_acl_flag(sb);
1687
1688 /* version 5 superblocks support inode version counters. */
1689 if (XFS_SB_VERSION_NUM(&mp->m_sb) == XFS_SB_VERSION_5)
1690 sb->s_flags |= SB_I_VERSION;
1691
1692 if (mp->m_flags & XFS_MOUNT_DAX) {
1693 xfs_warn(mp,
1694 "DAX enabled. Warning: EXPERIMENTAL, use at your own risk");
1695
1696 error = bdev_dax_supported(sb, sb->s_blocksize);
1697 if (error) {
1698 xfs_alert(mp,
1699 "DAX unsupported by block device. Turning off DAX.");
1700 mp->m_flags &= ~XFS_MOUNT_DAX;
1701 }
1702 if (xfs_sb_version_hasreflink(&mp->m_sb)) {
1703 xfs_alert(mp,
1704 "DAX and reflink cannot be used together!");
1705 error = -EINVAL;
1706 goto out_filestream_unmount;
1707 }
1708 }
1709
1710 if (mp->m_flags & XFS_MOUNT_DISCARD) {
1711 struct request_queue *q = bdev_get_queue(sb->s_bdev);
1712
1713 if (!blk_queue_discard(q)) {
1714 xfs_warn(mp, "mounting with \"discard\" option, but "
1715 "the device does not support discard");
1716 mp->m_flags &= ~XFS_MOUNT_DISCARD;
1717 }
1718 }
1719
1720 if (xfs_sb_version_hasreflink(&mp->m_sb) && mp->m_sb.sb_rblocks) {
1721 xfs_alert(mp,
1722 "reflink not compatible with realtime device!");
1723 error = -EINVAL;
1724 goto out_filestream_unmount;
1725 }
1726
1727 if (xfs_sb_version_hasrmapbt(&mp->m_sb) && mp->m_sb.sb_rblocks) {
1728 xfs_alert(mp,
1729 "reverse mapping btree not compatible with realtime device!");
1730 error = -EINVAL;
1731 goto out_filestream_unmount;
1732 }
1733
1734 error = xfs_mountfs(mp);
1735 if (error)
1736 goto out_filestream_unmount;
1737
1738 root = igrab(VFS_I(mp->m_rootip));
1739 if (!root) {
1740 error = -ENOENT;
1741 goto out_unmount;
1742 }
1743 sb->s_root = d_make_root(root);
1744 if (!sb->s_root) {
1745 error = -ENOMEM;
1746 goto out_unmount;
1747 }
1748
1749 return 0;
1750
1751 out_filestream_unmount:
1752 xfs_filestream_unmount(mp);
1753 out_free_sb:
1754 xfs_freesb(mp);
1755 out_free_stats:
1756 free_percpu(mp->m_stats.xs_stats);
1757 out_destroy_counters:
1758 xfs_destroy_percpu_counters(mp);
1759 out_destroy_workqueues:
1760 xfs_destroy_mount_workqueues(mp);
1761 out_close_devices:
1762 xfs_close_devices(mp);
1763 out_free_fsname:
1764 xfs_free_fsname(mp);
1765 kfree(mp);
1766 out:
1767 return error;
1768
1769 out_unmount:
1770 xfs_filestream_unmount(mp);
1771 xfs_unmountfs(mp);
1772 goto out_free_sb;
1773 }
1774
1775 STATIC void
1776 xfs_fs_put_super(
1777 struct super_block *sb)
1778 {
1779 struct xfs_mount *mp = XFS_M(sb);
1780
1781 xfs_notice(mp, "Unmounting Filesystem");
1782 xfs_filestream_unmount(mp);
1783 xfs_unmountfs(mp);
1784
1785 xfs_freesb(mp);
1786 free_percpu(mp->m_stats.xs_stats);
1787 xfs_destroy_percpu_counters(mp);
1788 xfs_destroy_mount_workqueues(mp);
1789 xfs_close_devices(mp);
1790 xfs_free_fsname(mp);
1791 kfree(mp);
1792 }
1793
1794 STATIC struct dentry *
1795 xfs_fs_mount(
1796 struct file_system_type *fs_type,
1797 int flags,
1798 const char *dev_name,
1799 void *data)
1800 {
1801 return mount_bdev(fs_type, flags, dev_name, data, xfs_fs_fill_super);
1802 }
1803
1804 static long
1805 xfs_fs_nr_cached_objects(
1806 struct super_block *sb,
1807 struct shrink_control *sc)
1808 {
1809 return xfs_reclaim_inodes_count(XFS_M(sb));
1810 }
1811
1812 static long
1813 xfs_fs_free_cached_objects(
1814 struct super_block *sb,
1815 struct shrink_control *sc)
1816 {
1817 return xfs_reclaim_inodes_nr(XFS_M(sb), sc->nr_to_scan);
1818 }
1819
1820 static const struct super_operations xfs_super_operations = {
1821 .alloc_inode = xfs_fs_alloc_inode,
1822 .destroy_inode = xfs_fs_destroy_inode,
1823 .dirty_inode = xfs_fs_dirty_inode,
1824 .drop_inode = xfs_fs_drop_inode,
1825 .put_super = xfs_fs_put_super,
1826 .sync_fs = xfs_fs_sync_fs,
1827 .freeze_fs = xfs_fs_freeze,
1828 .unfreeze_fs = xfs_fs_unfreeze,
1829 .statfs = xfs_fs_statfs,
1830 .remount_fs = xfs_fs_remount,
1831 .show_options = xfs_fs_show_options,
1832 .nr_cached_objects = xfs_fs_nr_cached_objects,
1833 .free_cached_objects = xfs_fs_free_cached_objects,
1834 };
1835
1836 static struct file_system_type xfs_fs_type = {
1837 .owner = THIS_MODULE,
1838 .name = "xfs",
1839 .mount = xfs_fs_mount,
1840 .kill_sb = kill_block_super,
1841 .fs_flags = FS_REQUIRES_DEV,
1842 };
1843 MODULE_ALIAS_FS("xfs");
1844
1845 STATIC int __init
1846 xfs_init_zones(void)
1847 {
1848 xfs_ioend_bioset = bioset_create(4 * MAX_BUF_PER_PAGE,
1849 offsetof(struct xfs_ioend, io_inline_bio),
1850 BIOSET_NEED_BVECS);
1851 if (!xfs_ioend_bioset)
1852 goto out;
1853
1854 xfs_log_ticket_zone = kmem_zone_init(sizeof(xlog_ticket_t),
1855 "xfs_log_ticket");
1856 if (!xfs_log_ticket_zone)
1857 goto out_free_ioend_bioset;
1858
1859 xfs_bmap_free_item_zone = kmem_zone_init(
1860 sizeof(struct xfs_extent_free_item),
1861 "xfs_bmap_free_item");
1862 if (!xfs_bmap_free_item_zone)
1863 goto out_destroy_log_ticket_zone;
1864
1865 xfs_btree_cur_zone = kmem_zone_init(sizeof(xfs_btree_cur_t),
1866 "xfs_btree_cur");
1867 if (!xfs_btree_cur_zone)
1868 goto out_destroy_bmap_free_item_zone;
1869
1870 xfs_da_state_zone = kmem_zone_init(sizeof(xfs_da_state_t),
1871 "xfs_da_state");
1872 if (!xfs_da_state_zone)
1873 goto out_destroy_btree_cur_zone;
1874
1875 xfs_ifork_zone = kmem_zone_init(sizeof(xfs_ifork_t), "xfs_ifork");
1876 if (!xfs_ifork_zone)
1877 goto out_destroy_da_state_zone;
1878
1879 xfs_trans_zone = kmem_zone_init(sizeof(xfs_trans_t), "xfs_trans");
1880 if (!xfs_trans_zone)
1881 goto out_destroy_ifork_zone;
1882
1883 xfs_log_item_desc_zone =
1884 kmem_zone_init(sizeof(struct xfs_log_item_desc),
1885 "xfs_log_item_desc");
1886 if (!xfs_log_item_desc_zone)
1887 goto out_destroy_trans_zone;
1888
1889 /*
1890 * The size of the zone allocated buf log item is the maximum
1891 * size possible under XFS. This wastes a little bit of memory,
1892 * but it is much faster.
1893 */
1894 xfs_buf_item_zone = kmem_zone_init(sizeof(struct xfs_buf_log_item),
1895 "xfs_buf_item");
1896 if (!xfs_buf_item_zone)
1897 goto out_destroy_log_item_desc_zone;
1898
1899 xfs_efd_zone = kmem_zone_init((sizeof(xfs_efd_log_item_t) +
1900 ((XFS_EFD_MAX_FAST_EXTENTS - 1) *
1901 sizeof(xfs_extent_t))), "xfs_efd_item");
1902 if (!xfs_efd_zone)
1903 goto out_destroy_buf_item_zone;
1904
1905 xfs_efi_zone = kmem_zone_init((sizeof(xfs_efi_log_item_t) +
1906 ((XFS_EFI_MAX_FAST_EXTENTS - 1) *
1907 sizeof(xfs_extent_t))), "xfs_efi_item");
1908 if (!xfs_efi_zone)
1909 goto out_destroy_efd_zone;
1910
1911 xfs_inode_zone =
1912 kmem_zone_init_flags(sizeof(xfs_inode_t), "xfs_inode",
1913 KM_ZONE_HWALIGN | KM_ZONE_RECLAIM | KM_ZONE_SPREAD |
1914 KM_ZONE_ACCOUNT, xfs_fs_inode_init_once);
1915 if (!xfs_inode_zone)
1916 goto out_destroy_efi_zone;
1917
1918 xfs_ili_zone =
1919 kmem_zone_init_flags(sizeof(xfs_inode_log_item_t), "xfs_ili",
1920 KM_ZONE_SPREAD, NULL);
1921 if (!xfs_ili_zone)
1922 goto out_destroy_inode_zone;
1923 xfs_icreate_zone = kmem_zone_init(sizeof(struct xfs_icreate_item),
1924 "xfs_icr");
1925 if (!xfs_icreate_zone)
1926 goto out_destroy_ili_zone;
1927
1928 xfs_rud_zone = kmem_zone_init(sizeof(struct xfs_rud_log_item),
1929 "xfs_rud_item");
1930 if (!xfs_rud_zone)
1931 goto out_destroy_icreate_zone;
1932
1933 xfs_rui_zone = kmem_zone_init(
1934 xfs_rui_log_item_sizeof(XFS_RUI_MAX_FAST_EXTENTS),
1935 "xfs_rui_item");
1936 if (!xfs_rui_zone)
1937 goto out_destroy_rud_zone;
1938
1939 xfs_cud_zone = kmem_zone_init(sizeof(struct xfs_cud_log_item),
1940 "xfs_cud_item");
1941 if (!xfs_cud_zone)
1942 goto out_destroy_rui_zone;
1943
1944 xfs_cui_zone = kmem_zone_init(
1945 xfs_cui_log_item_sizeof(XFS_CUI_MAX_FAST_EXTENTS),
1946 "xfs_cui_item");
1947 if (!xfs_cui_zone)
1948 goto out_destroy_cud_zone;
1949
1950 xfs_bud_zone = kmem_zone_init(sizeof(struct xfs_bud_log_item),
1951 "xfs_bud_item");
1952 if (!xfs_bud_zone)
1953 goto out_destroy_cui_zone;
1954
1955 xfs_bui_zone = kmem_zone_init(
1956 xfs_bui_log_item_sizeof(XFS_BUI_MAX_FAST_EXTENTS),
1957 "xfs_bui_item");
1958 if (!xfs_bui_zone)
1959 goto out_destroy_bud_zone;
1960
1961 return 0;
1962
1963 out_destroy_bud_zone:
1964 kmem_zone_destroy(xfs_bud_zone);
1965 out_destroy_cui_zone:
1966 kmem_zone_destroy(xfs_cui_zone);
1967 out_destroy_cud_zone:
1968 kmem_zone_destroy(xfs_cud_zone);
1969 out_destroy_rui_zone:
1970 kmem_zone_destroy(xfs_rui_zone);
1971 out_destroy_rud_zone:
1972 kmem_zone_destroy(xfs_rud_zone);
1973 out_destroy_icreate_zone:
1974 kmem_zone_destroy(xfs_icreate_zone);
1975 out_destroy_ili_zone:
1976 kmem_zone_destroy(xfs_ili_zone);
1977 out_destroy_inode_zone:
1978 kmem_zone_destroy(xfs_inode_zone);
1979 out_destroy_efi_zone:
1980 kmem_zone_destroy(xfs_efi_zone);
1981 out_destroy_efd_zone:
1982 kmem_zone_destroy(xfs_efd_zone);
1983 out_destroy_buf_item_zone:
1984 kmem_zone_destroy(xfs_buf_item_zone);
1985 out_destroy_log_item_desc_zone:
1986 kmem_zone_destroy(xfs_log_item_desc_zone);
1987 out_destroy_trans_zone:
1988 kmem_zone_destroy(xfs_trans_zone);
1989 out_destroy_ifork_zone:
1990 kmem_zone_destroy(xfs_ifork_zone);
1991 out_destroy_da_state_zone:
1992 kmem_zone_destroy(xfs_da_state_zone);
1993 out_destroy_btree_cur_zone:
1994 kmem_zone_destroy(xfs_btree_cur_zone);
1995 out_destroy_bmap_free_item_zone:
1996 kmem_zone_destroy(xfs_bmap_free_item_zone);
1997 out_destroy_log_ticket_zone:
1998 kmem_zone_destroy(xfs_log_ticket_zone);
1999 out_free_ioend_bioset:
2000 bioset_free(xfs_ioend_bioset);
2001 out:
2002 return -ENOMEM;
2003 }
2004
2005 STATIC void
2006 xfs_destroy_zones(void)
2007 {
2008 /*
2009 * Make sure all delayed rcu free are flushed before we
2010 * destroy caches.
2011 */
2012 rcu_barrier();
2013 kmem_zone_destroy(xfs_bui_zone);
2014 kmem_zone_destroy(xfs_bud_zone);
2015 kmem_zone_destroy(xfs_cui_zone);
2016 kmem_zone_destroy(xfs_cud_zone);
2017 kmem_zone_destroy(xfs_rui_zone);
2018 kmem_zone_destroy(xfs_rud_zone);
2019 kmem_zone_destroy(xfs_icreate_zone);
2020 kmem_zone_destroy(xfs_ili_zone);
2021 kmem_zone_destroy(xfs_inode_zone);
2022 kmem_zone_destroy(xfs_efi_zone);
2023 kmem_zone_destroy(xfs_efd_zone);
2024 kmem_zone_destroy(xfs_buf_item_zone);
2025 kmem_zone_destroy(xfs_log_item_desc_zone);
2026 kmem_zone_destroy(xfs_trans_zone);
2027 kmem_zone_destroy(xfs_ifork_zone);
2028 kmem_zone_destroy(xfs_da_state_zone);
2029 kmem_zone_destroy(xfs_btree_cur_zone);
2030 kmem_zone_destroy(xfs_bmap_free_item_zone);
2031 kmem_zone_destroy(xfs_log_ticket_zone);
2032 bioset_free(xfs_ioend_bioset);
2033 }
2034
2035 STATIC int __init
2036 xfs_init_workqueues(void)
2037 {
2038 /*
2039 * The allocation workqueue can be used in memory reclaim situations
2040 * (writepage path), and parallelism is only limited by the number of
2041 * AGs in all the filesystems mounted. Hence use the default large
2042 * max_active value for this workqueue.
2043 */
2044 xfs_alloc_wq = alloc_workqueue("xfsalloc",
2045 WQ_MEM_RECLAIM|WQ_FREEZABLE, 0);
2046 if (!xfs_alloc_wq)
2047 return -ENOMEM;
2048
2049 xfs_discard_wq = alloc_workqueue("xfsdiscard", WQ_UNBOUND, 0);
2050 if (!xfs_discard_wq)
2051 goto out_free_alloc_wq;
2052
2053 return 0;
2054 out_free_alloc_wq:
2055 destroy_workqueue(xfs_alloc_wq);
2056 return -ENOMEM;
2057 }
2058
2059 STATIC void
2060 xfs_destroy_workqueues(void)
2061 {
2062 destroy_workqueue(xfs_discard_wq);
2063 destroy_workqueue(xfs_alloc_wq);
2064 }
2065
2066 STATIC int __init
2067 init_xfs_fs(void)
2068 {
2069 int error;
2070
2071 xfs_check_ondisk_structs();
2072
2073 printk(KERN_INFO XFS_VERSION_STRING " with "
2074 XFS_BUILD_OPTIONS " enabled\n");
2075
2076 xfs_extent_free_init_defer_op();
2077 xfs_rmap_update_init_defer_op();
2078 xfs_refcount_update_init_defer_op();
2079 xfs_bmap_update_init_defer_op();
2080
2081 xfs_dir_startup();
2082
2083 error = xfs_init_zones();
2084 if (error)
2085 goto out;
2086
2087 error = xfs_init_workqueues();
2088 if (error)
2089 goto out_destroy_zones;
2090
2091 error = xfs_mru_cache_init();
2092 if (error)
2093 goto out_destroy_wq;
2094
2095 error = xfs_buf_init();
2096 if (error)
2097 goto out_mru_cache_uninit;
2098
2099 error = xfs_init_procfs();
2100 if (error)
2101 goto out_buf_terminate;
2102
2103 error = xfs_sysctl_register();
2104 if (error)
2105 goto out_cleanup_procfs;
2106
2107 xfs_kset = kset_create_and_add("xfs", NULL, fs_kobj);
2108 if (!xfs_kset) {
2109 error = -ENOMEM;
2110 goto out_sysctl_unregister;
2111 }
2112
2113 xfsstats.xs_kobj.kobject.kset = xfs_kset;
2114
2115 xfsstats.xs_stats = alloc_percpu(struct xfsstats);
2116 if (!xfsstats.xs_stats) {
2117 error = -ENOMEM;
2118 goto out_kset_unregister;
2119 }
2120
2121 error = xfs_sysfs_init(&xfsstats.xs_kobj, &xfs_stats_ktype, NULL,
2122 "stats");
2123 if (error)
2124 goto out_free_stats;
2125
2126 #ifdef DEBUG
2127 xfs_dbg_kobj.kobject.kset = xfs_kset;
2128 error = xfs_sysfs_init(&xfs_dbg_kobj, &xfs_dbg_ktype, NULL, "debug");
2129 if (error)
2130 goto out_remove_stats_kobj;
2131 #endif
2132
2133 error = xfs_qm_init();
2134 if (error)
2135 goto out_remove_dbg_kobj;
2136
2137 error = register_filesystem(&xfs_fs_type);
2138 if (error)
2139 goto out_qm_exit;
2140 return 0;
2141
2142 out_qm_exit:
2143 xfs_qm_exit();
2144 out_remove_dbg_kobj:
2145 #ifdef DEBUG
2146 xfs_sysfs_del(&xfs_dbg_kobj);
2147 out_remove_stats_kobj:
2148 #endif
2149 xfs_sysfs_del(&xfsstats.xs_kobj);
2150 out_free_stats:
2151 free_percpu(xfsstats.xs_stats);
2152 out_kset_unregister:
2153 kset_unregister(xfs_kset);
2154 out_sysctl_unregister:
2155 xfs_sysctl_unregister();
2156 out_cleanup_procfs:
2157 xfs_cleanup_procfs();
2158 out_buf_terminate:
2159 xfs_buf_terminate();
2160 out_mru_cache_uninit:
2161 xfs_mru_cache_uninit();
2162 out_destroy_wq:
2163 xfs_destroy_workqueues();
2164 out_destroy_zones:
2165 xfs_destroy_zones();
2166 out:
2167 return error;
2168 }
2169
2170 STATIC void __exit
2171 exit_xfs_fs(void)
2172 {
2173 xfs_qm_exit();
2174 unregister_filesystem(&xfs_fs_type);
2175 #ifdef DEBUG
2176 xfs_sysfs_del(&xfs_dbg_kobj);
2177 #endif
2178 xfs_sysfs_del(&xfsstats.xs_kobj);
2179 free_percpu(xfsstats.xs_stats);
2180 kset_unregister(xfs_kset);
2181 xfs_sysctl_unregister();
2182 xfs_cleanup_procfs();
2183 xfs_buf_terminate();
2184 xfs_mru_cache_uninit();
2185 xfs_destroy_workqueues();
2186 xfs_destroy_zones();
2187 xfs_uuid_table_free();
2188 }
2189
2190 module_init(init_xfs_fs);
2191 module_exit(exit_xfs_fs);
2192
2193 MODULE_AUTHOR("Silicon Graphics, Inc.");
2194 MODULE_DESCRIPTION(XFS_VERSION_STRING " with " XFS_BUILD_OPTIONS " enabled");
2195 MODULE_LICENSE("GPL");
Linux with added FPC-III support