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Merge branch 'core-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
[deliverable/linux.git] / fs / xfs / linux-2.6 / xfs_super.c
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 #include "xfs.h"
19 #include "xfs_bit.h"
20 #include "xfs_log.h"
21 #include "xfs_inum.h"
22 #include "xfs_trans.h"
23 #include "xfs_sb.h"
24 #include "xfs_ag.h"
25 #include "xfs_dir2.h"
26 #include "xfs_alloc.h"
27 #include "xfs_dmapi.h"
28 #include "xfs_quota.h"
29 #include "xfs_mount.h"
30 #include "xfs_bmap_btree.h"
31 #include "xfs_alloc_btree.h"
32 #include "xfs_ialloc_btree.h"
33 #include "xfs_dir2_sf.h"
34 #include "xfs_attr_sf.h"
35 #include "xfs_dinode.h"
36 #include "xfs_inode.h"
37 #include "xfs_btree.h"
38 #include "xfs_btree_trace.h"
39 #include "xfs_ialloc.h"
40 #include "xfs_bmap.h"
41 #include "xfs_rtalloc.h"
42 #include "xfs_error.h"
43 #include "xfs_itable.h"
44 #include "xfs_fsops.h"
45 #include "xfs_rw.h"
46 #include "xfs_attr.h"
47 #include "xfs_buf_item.h"
48 #include "xfs_utils.h"
49 #include "xfs_vnodeops.h"
50 #include "xfs_version.h"
51 #include "xfs_log_priv.h"
52 #include "xfs_trans_priv.h"
53 #include "xfs_filestream.h"
54 #include "xfs_da_btree.h"
55 #include "xfs_dir2_trace.h"
56 #include "xfs_extfree_item.h"
57 #include "xfs_mru_cache.h"
58 #include "xfs_inode_item.h"
59 #include "xfs_sync.h"
60
61 #include <linux/namei.h>
62 #include <linux/init.h>
63 #include <linux/mount.h>
64 #include <linux/mempool.h>
65 #include <linux/writeback.h>
66 #include <linux/kthread.h>
67 #include <linux/freezer.h>
68 #include <linux/parser.h>
69
70 static const struct super_operations xfs_super_operations;
71 static kmem_zone_t *xfs_ioend_zone;
72 mempool_t *xfs_ioend_pool;
73
74 #define MNTOPT_LOGBUFS "logbufs" /* number of XFS log buffers */
75 #define MNTOPT_LOGBSIZE "logbsize" /* size of XFS log buffers */
76 #define MNTOPT_LOGDEV "logdev" /* log device */
77 #define MNTOPT_RTDEV "rtdev" /* realtime I/O device */
78 #define MNTOPT_BIOSIZE "biosize" /* log2 of preferred buffered io size */
79 #define MNTOPT_WSYNC "wsync" /* safe-mode nfs compatible mount */
80 #define MNTOPT_NOALIGN "noalign" /* turn off stripe alignment */
81 #define MNTOPT_SWALLOC "swalloc" /* turn on stripe width allocation */
82 #define MNTOPT_SUNIT "sunit" /* data volume stripe unit */
83 #define MNTOPT_SWIDTH "swidth" /* data volume stripe width */
84 #define MNTOPT_NOUUID "nouuid" /* ignore filesystem UUID */
85 #define MNTOPT_MTPT "mtpt" /* filesystem mount point */
86 #define MNTOPT_GRPID "grpid" /* group-ID from parent directory */
87 #define MNTOPT_NOGRPID "nogrpid" /* group-ID from current process */
88 #define MNTOPT_BSDGROUPS "bsdgroups" /* group-ID from parent directory */
89 #define MNTOPT_SYSVGROUPS "sysvgroups" /* group-ID from current process */
90 #define MNTOPT_ALLOCSIZE "allocsize" /* preferred allocation size */
91 #define MNTOPT_NORECOVERY "norecovery" /* don't run XFS recovery */
92 #define MNTOPT_BARRIER "barrier" /* use writer barriers for log write and
93 * unwritten extent conversion */
94 #define MNTOPT_NOBARRIER "nobarrier" /* .. disable */
95 #define MNTOPT_OSYNCISOSYNC "osyncisosync" /* o_sync is REALLY o_sync */
96 #define MNTOPT_64BITINODE "inode64" /* inodes can be allocated anywhere */
97 #define MNTOPT_IKEEP "ikeep" /* do not free empty inode clusters */
98 #define MNTOPT_NOIKEEP "noikeep" /* free empty inode clusters */
99 #define MNTOPT_LARGEIO "largeio" /* report large I/O sizes in stat() */
100 #define MNTOPT_NOLARGEIO "nolargeio" /* do not report large I/O sizes
101 * in stat(). */
102 #define MNTOPT_ATTR2 "attr2" /* do use attr2 attribute format */
103 #define MNTOPT_NOATTR2 "noattr2" /* do not use attr2 attribute format */
104 #define MNTOPT_FILESTREAM "filestreams" /* use filestreams allocator */
105 #define MNTOPT_QUOTA "quota" /* disk quotas (user) */
106 #define MNTOPT_NOQUOTA "noquota" /* no quotas */
107 #define MNTOPT_USRQUOTA "usrquota" /* user quota enabled */
108 #define MNTOPT_GRPQUOTA "grpquota" /* group quota enabled */
109 #define MNTOPT_PRJQUOTA "prjquota" /* project quota enabled */
110 #define MNTOPT_UQUOTA "uquota" /* user quota (IRIX variant) */
111 #define MNTOPT_GQUOTA "gquota" /* group quota (IRIX variant) */
112 #define MNTOPT_PQUOTA "pquota" /* project quota (IRIX variant) */
113 #define MNTOPT_UQUOTANOENF "uqnoenforce"/* user quota limit enforcement */
114 #define MNTOPT_GQUOTANOENF "gqnoenforce"/* group quota limit enforcement */
115 #define MNTOPT_PQUOTANOENF "pqnoenforce"/* project quota limit enforcement */
116 #define MNTOPT_QUOTANOENF "qnoenforce" /* same as uqnoenforce */
117 #define MNTOPT_DMAPI "dmapi" /* DMI enabled (DMAPI / XDSM) */
118 #define MNTOPT_XDSM "xdsm" /* DMI enabled (DMAPI / XDSM) */
119 #define MNTOPT_DMI "dmi" /* DMI enabled (DMAPI / XDSM) */
120
121 /*
122 * Table driven mount option parser.
123 *
124 * Currently only used for remount, but it will be used for mount
125 * in the future, too.
126 */
127 enum {
128 Opt_barrier, Opt_nobarrier, Opt_err
129 };
130
131 static const match_table_t tokens = {
132 {Opt_barrier, "barrier"},
133 {Opt_nobarrier, "nobarrier"},
134 {Opt_err, NULL}
135 };
136
137
138 STATIC unsigned long
139 suffix_strtoul(char *s, char **endp, unsigned int base)
140 {
141 int last, shift_left_factor = 0;
142 char *value = s;
143
144 last = strlen(value) - 1;
145 if (value[last] == 'K' || value[last] == 'k') {
146 shift_left_factor = 10;
147 value[last] = '\0';
148 }
149 if (value[last] == 'M' || value[last] == 'm') {
150 shift_left_factor = 20;
151 value[last] = '\0';
152 }
153 if (value[last] == 'G' || value[last] == 'g') {
154 shift_left_factor = 30;
155 value[last] = '\0';
156 }
157
158 return simple_strtoul((const char *)s, endp, base) << shift_left_factor;
159 }
160
161 /*
162 * This function fills in xfs_mount_t fields based on mount args.
163 * Note: the superblock has _not_ yet been read in.
164 *
165 * Note that this function leaks the various device name allocations on
166 * failure. The caller takes care of them.
167 */
168 STATIC int
169 xfs_parseargs(
170 struct xfs_mount *mp,
171 char *options,
172 char **mtpt)
173 {
174 struct super_block *sb = mp->m_super;
175 char *this_char, *value, *eov;
176 int dsunit = 0;
177 int dswidth = 0;
178 int iosize = 0;
179 int dmapi_implies_ikeep = 1;
180 __uint8_t iosizelog = 0;
181
182 /*
183 * Copy binary VFS mount flags we are interested in.
184 */
185 if (sb->s_flags & MS_RDONLY)
186 mp->m_flags |= XFS_MOUNT_RDONLY;
187 if (sb->s_flags & MS_DIRSYNC)
188 mp->m_flags |= XFS_MOUNT_DIRSYNC;
189 if (sb->s_flags & MS_SYNCHRONOUS)
190 mp->m_flags |= XFS_MOUNT_WSYNC;
191
192 /*
193 * Set some default flags that could be cleared by the mount option
194 * parsing.
195 */
196 mp->m_flags |= XFS_MOUNT_BARRIER;
197 mp->m_flags |= XFS_MOUNT_COMPAT_IOSIZE;
198 mp->m_flags |= XFS_MOUNT_SMALL_INUMS;
199
200 /*
201 * These can be overridden by the mount option parsing.
202 */
203 mp->m_logbufs = -1;
204 mp->m_logbsize = -1;
205
206 if (!options)
207 goto done;
208
209 while ((this_char = strsep(&options, ",")) != NULL) {
210 if (!*this_char)
211 continue;
212 if ((value = strchr(this_char, '=')) != NULL)
213 *value++ = 0;
214
215 if (!strcmp(this_char, MNTOPT_LOGBUFS)) {
216 if (!value || !*value) {
217 cmn_err(CE_WARN,
218 "XFS: %s option requires an argument",
219 this_char);
220 return EINVAL;
221 }
222 mp->m_logbufs = simple_strtoul(value, &eov, 10);
223 } else if (!strcmp(this_char, MNTOPT_LOGBSIZE)) {
224 if (!value || !*value) {
225 cmn_err(CE_WARN,
226 "XFS: %s option requires an argument",
227 this_char);
228 return EINVAL;
229 }
230 mp->m_logbsize = suffix_strtoul(value, &eov, 10);
231 } else if (!strcmp(this_char, MNTOPT_LOGDEV)) {
232 if (!value || !*value) {
233 cmn_err(CE_WARN,
234 "XFS: %s option requires an argument",
235 this_char);
236 return EINVAL;
237 }
238 mp->m_logname = kstrndup(value, MAXNAMELEN, GFP_KERNEL);
239 if (!mp->m_logname)
240 return ENOMEM;
241 } else if (!strcmp(this_char, MNTOPT_MTPT)) {
242 if (!value || !*value) {
243 cmn_err(CE_WARN,
244 "XFS: %s option requires an argument",
245 this_char);
246 return EINVAL;
247 }
248 *mtpt = kstrndup(value, MAXNAMELEN, GFP_KERNEL);
249 if (!*mtpt)
250 return ENOMEM;
251 } else if (!strcmp(this_char, MNTOPT_RTDEV)) {
252 if (!value || !*value) {
253 cmn_err(CE_WARN,
254 "XFS: %s option requires an argument",
255 this_char);
256 return EINVAL;
257 }
258 mp->m_rtname = kstrndup(value, MAXNAMELEN, GFP_KERNEL);
259 if (!mp->m_rtname)
260 return ENOMEM;
261 } else if (!strcmp(this_char, MNTOPT_BIOSIZE)) {
262 if (!value || !*value) {
263 cmn_err(CE_WARN,
264 "XFS: %s option requires an argument",
265 this_char);
266 return EINVAL;
267 }
268 iosize = simple_strtoul(value, &eov, 10);
269 iosizelog = ffs(iosize) - 1;
270 } else if (!strcmp(this_char, MNTOPT_ALLOCSIZE)) {
271 if (!value || !*value) {
272 cmn_err(CE_WARN,
273 "XFS: %s option requires an argument",
274 this_char);
275 return EINVAL;
276 }
277 iosize = suffix_strtoul(value, &eov, 10);
278 iosizelog = ffs(iosize) - 1;
279 } else if (!strcmp(this_char, MNTOPT_GRPID) ||
280 !strcmp(this_char, MNTOPT_BSDGROUPS)) {
281 mp->m_flags |= XFS_MOUNT_GRPID;
282 } else if (!strcmp(this_char, MNTOPT_NOGRPID) ||
283 !strcmp(this_char, MNTOPT_SYSVGROUPS)) {
284 mp->m_flags &= ~XFS_MOUNT_GRPID;
285 } else if (!strcmp(this_char, MNTOPT_WSYNC)) {
286 mp->m_flags |= XFS_MOUNT_WSYNC;
287 } else if (!strcmp(this_char, MNTOPT_OSYNCISOSYNC)) {
288 mp->m_flags |= XFS_MOUNT_OSYNCISOSYNC;
289 } else if (!strcmp(this_char, MNTOPT_NORECOVERY)) {
290 mp->m_flags |= XFS_MOUNT_NORECOVERY;
291 } else if (!strcmp(this_char, MNTOPT_NOALIGN)) {
292 mp->m_flags |= XFS_MOUNT_NOALIGN;
293 } else if (!strcmp(this_char, MNTOPT_SWALLOC)) {
294 mp->m_flags |= XFS_MOUNT_SWALLOC;
295 } else if (!strcmp(this_char, MNTOPT_SUNIT)) {
296 if (!value || !*value) {
297 cmn_err(CE_WARN,
298 "XFS: %s option requires an argument",
299 this_char);
300 return EINVAL;
301 }
302 dsunit = simple_strtoul(value, &eov, 10);
303 } else if (!strcmp(this_char, MNTOPT_SWIDTH)) {
304 if (!value || !*value) {
305 cmn_err(CE_WARN,
306 "XFS: %s option requires an argument",
307 this_char);
308 return EINVAL;
309 }
310 dswidth = simple_strtoul(value, &eov, 10);
311 } else if (!strcmp(this_char, MNTOPT_64BITINODE)) {
312 mp->m_flags &= ~XFS_MOUNT_SMALL_INUMS;
313 #if !XFS_BIG_INUMS
314 cmn_err(CE_WARN,
315 "XFS: %s option not allowed on this system",
316 this_char);
317 return EINVAL;
318 #endif
319 } else if (!strcmp(this_char, MNTOPT_NOUUID)) {
320 mp->m_flags |= XFS_MOUNT_NOUUID;
321 } else if (!strcmp(this_char, MNTOPT_BARRIER)) {
322 mp->m_flags |= XFS_MOUNT_BARRIER;
323 } else if (!strcmp(this_char, MNTOPT_NOBARRIER)) {
324 mp->m_flags &= ~XFS_MOUNT_BARRIER;
325 } else if (!strcmp(this_char, MNTOPT_IKEEP)) {
326 mp->m_flags |= XFS_MOUNT_IKEEP;
327 } else if (!strcmp(this_char, MNTOPT_NOIKEEP)) {
328 dmapi_implies_ikeep = 0;
329 mp->m_flags &= ~XFS_MOUNT_IKEEP;
330 } else if (!strcmp(this_char, MNTOPT_LARGEIO)) {
331 mp->m_flags &= ~XFS_MOUNT_COMPAT_IOSIZE;
332 } else if (!strcmp(this_char, MNTOPT_NOLARGEIO)) {
333 mp->m_flags |= XFS_MOUNT_COMPAT_IOSIZE;
334 } else if (!strcmp(this_char, MNTOPT_ATTR2)) {
335 mp->m_flags |= XFS_MOUNT_ATTR2;
336 } else if (!strcmp(this_char, MNTOPT_NOATTR2)) {
337 mp->m_flags &= ~XFS_MOUNT_ATTR2;
338 mp->m_flags |= XFS_MOUNT_NOATTR2;
339 } else if (!strcmp(this_char, MNTOPT_FILESTREAM)) {
340 mp->m_flags |= XFS_MOUNT_FILESTREAMS;
341 } else if (!strcmp(this_char, MNTOPT_NOQUOTA)) {
342 mp->m_qflags &= ~(XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE |
343 XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE |
344 XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE |
345 XFS_UQUOTA_ENFD | XFS_OQUOTA_ENFD);
346 } else if (!strcmp(this_char, MNTOPT_QUOTA) ||
347 !strcmp(this_char, MNTOPT_UQUOTA) ||
348 !strcmp(this_char, MNTOPT_USRQUOTA)) {
349 mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE |
350 XFS_UQUOTA_ENFD);
351 } else if (!strcmp(this_char, MNTOPT_QUOTANOENF) ||
352 !strcmp(this_char, MNTOPT_UQUOTANOENF)) {
353 mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE);
354 mp->m_qflags &= ~XFS_UQUOTA_ENFD;
355 } else if (!strcmp(this_char, MNTOPT_PQUOTA) ||
356 !strcmp(this_char, MNTOPT_PRJQUOTA)) {
357 mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE |
358 XFS_OQUOTA_ENFD);
359 } else if (!strcmp(this_char, MNTOPT_PQUOTANOENF)) {
360 mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE);
361 mp->m_qflags &= ~XFS_OQUOTA_ENFD;
362 } else if (!strcmp(this_char, MNTOPT_GQUOTA) ||
363 !strcmp(this_char, MNTOPT_GRPQUOTA)) {
364 mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE |
365 XFS_OQUOTA_ENFD);
366 } else if (!strcmp(this_char, MNTOPT_GQUOTANOENF)) {
367 mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE);
368 mp->m_qflags &= ~XFS_OQUOTA_ENFD;
369 } else if (!strcmp(this_char, MNTOPT_DMAPI)) {
370 mp->m_flags |= XFS_MOUNT_DMAPI;
371 } else if (!strcmp(this_char, MNTOPT_XDSM)) {
372 mp->m_flags |= XFS_MOUNT_DMAPI;
373 } else if (!strcmp(this_char, MNTOPT_DMI)) {
374 mp->m_flags |= XFS_MOUNT_DMAPI;
375 } else if (!strcmp(this_char, "ihashsize")) {
376 cmn_err(CE_WARN,
377 "XFS: ihashsize no longer used, option is deprecated.");
378 } else if (!strcmp(this_char, "osyncisdsync")) {
379 /* no-op, this is now the default */
380 cmn_err(CE_WARN,
381 "XFS: osyncisdsync is now the default, option is deprecated.");
382 } else if (!strcmp(this_char, "irixsgid")) {
383 cmn_err(CE_WARN,
384 "XFS: irixsgid is now a sysctl(2) variable, option is deprecated.");
385 } else {
386 cmn_err(CE_WARN,
387 "XFS: unknown mount option [%s].", this_char);
388 return EINVAL;
389 }
390 }
391
392 /*
393 * no recovery flag requires a read-only mount
394 */
395 if ((mp->m_flags & XFS_MOUNT_NORECOVERY) &&
396 !(mp->m_flags & XFS_MOUNT_RDONLY)) {
397 cmn_err(CE_WARN, "XFS: no-recovery mounts must be read-only.");
398 return EINVAL;
399 }
400
401 if ((mp->m_flags & XFS_MOUNT_NOALIGN) && (dsunit || dswidth)) {
402 cmn_err(CE_WARN,
403 "XFS: sunit and swidth options incompatible with the noalign option");
404 return EINVAL;
405 }
406
407 #ifndef CONFIG_XFS_QUOTA
408 if (XFS_IS_QUOTA_RUNNING(mp)) {
409 cmn_err(CE_WARN,
410 "XFS: quota support not available in this kernel.");
411 return EINVAL;
412 }
413 #endif
414
415 if ((mp->m_qflags & (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE)) &&
416 (mp->m_qflags & (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE))) {
417 cmn_err(CE_WARN,
418 "XFS: cannot mount with both project and group quota");
419 return EINVAL;
420 }
421
422 if ((mp->m_flags & XFS_MOUNT_DMAPI) && (!*mtpt || *mtpt[0] == '\0')) {
423 printk("XFS: %s option needs the mount point option as well\n",
424 MNTOPT_DMAPI);
425 return EINVAL;
426 }
427
428 if ((dsunit && !dswidth) || (!dsunit && dswidth)) {
429 cmn_err(CE_WARN,
430 "XFS: sunit and swidth must be specified together");
431 return EINVAL;
432 }
433
434 if (dsunit && (dswidth % dsunit != 0)) {
435 cmn_err(CE_WARN,
436 "XFS: stripe width (%d) must be a multiple of the stripe unit (%d)",
437 dswidth, dsunit);
438 return EINVAL;
439 }
440
441 /*
442 * Applications using DMI filesystems often expect the
443 * inode generation number to be monotonically increasing.
444 * If we delete inode chunks we break this assumption, so
445 * keep unused inode chunks on disk for DMI filesystems
446 * until we come up with a better solution.
447 * Note that if "ikeep" or "noikeep" mount options are
448 * supplied, then they are honored.
449 */
450 if ((mp->m_flags & XFS_MOUNT_DMAPI) && dmapi_implies_ikeep)
451 mp->m_flags |= XFS_MOUNT_IKEEP;
452
453 done:
454 if (!(mp->m_flags & XFS_MOUNT_NOALIGN)) {
455 /*
456 * At this point the superblock has not been read
457 * in, therefore we do not know the block size.
458 * Before the mount call ends we will convert
459 * these to FSBs.
460 */
461 if (dsunit) {
462 mp->m_dalign = dsunit;
463 mp->m_flags |= XFS_MOUNT_RETERR;
464 }
465
466 if (dswidth)
467 mp->m_swidth = dswidth;
468 }
469
470 if (mp->m_logbufs != -1 &&
471 mp->m_logbufs != 0 &&
472 (mp->m_logbufs < XLOG_MIN_ICLOGS ||
473 mp->m_logbufs > XLOG_MAX_ICLOGS)) {
474 cmn_err(CE_WARN,
475 "XFS: invalid logbufs value: %d [not %d-%d]",
476 mp->m_logbufs, XLOG_MIN_ICLOGS, XLOG_MAX_ICLOGS);
477 return XFS_ERROR(EINVAL);
478 }
479 if (mp->m_logbsize != -1 &&
480 mp->m_logbsize != 0 &&
481 (mp->m_logbsize < XLOG_MIN_RECORD_BSIZE ||
482 mp->m_logbsize > XLOG_MAX_RECORD_BSIZE ||
483 !is_power_of_2(mp->m_logbsize))) {
484 cmn_err(CE_WARN,
485 "XFS: invalid logbufsize: %d [not 16k,32k,64k,128k or 256k]",
486 mp->m_logbsize);
487 return XFS_ERROR(EINVAL);
488 }
489
490 mp->m_fsname = kstrndup(sb->s_id, MAXNAMELEN, GFP_KERNEL);
491 if (!mp->m_fsname)
492 return ENOMEM;
493 mp->m_fsname_len = strlen(mp->m_fsname) + 1;
494
495 if (iosizelog) {
496 if (iosizelog > XFS_MAX_IO_LOG ||
497 iosizelog < XFS_MIN_IO_LOG) {
498 cmn_err(CE_WARN,
499 "XFS: invalid log iosize: %d [not %d-%d]",
500 iosizelog, XFS_MIN_IO_LOG,
501 XFS_MAX_IO_LOG);
502 return XFS_ERROR(EINVAL);
503 }
504
505 mp->m_flags |= XFS_MOUNT_DFLT_IOSIZE;
506 mp->m_readio_log = iosizelog;
507 mp->m_writeio_log = iosizelog;
508 }
509
510 return 0;
511 }
512
513 struct proc_xfs_info {
514 int flag;
515 char *str;
516 };
517
518 STATIC int
519 xfs_showargs(
520 struct xfs_mount *mp,
521 struct seq_file *m)
522 {
523 static struct proc_xfs_info xfs_info_set[] = {
524 /* the few simple ones we can get from the mount struct */
525 { XFS_MOUNT_IKEEP, "," MNTOPT_IKEEP },
526 { XFS_MOUNT_WSYNC, "," MNTOPT_WSYNC },
527 { XFS_MOUNT_NOALIGN, "," MNTOPT_NOALIGN },
528 { XFS_MOUNT_SWALLOC, "," MNTOPT_SWALLOC },
529 { XFS_MOUNT_NOUUID, "," MNTOPT_NOUUID },
530 { XFS_MOUNT_NORECOVERY, "," MNTOPT_NORECOVERY },
531 { XFS_MOUNT_OSYNCISOSYNC, "," MNTOPT_OSYNCISOSYNC },
532 { XFS_MOUNT_ATTR2, "," MNTOPT_ATTR2 },
533 { XFS_MOUNT_FILESTREAMS, "," MNTOPT_FILESTREAM },
534 { XFS_MOUNT_DMAPI, "," MNTOPT_DMAPI },
535 { XFS_MOUNT_GRPID, "," MNTOPT_GRPID },
536 { 0, NULL }
537 };
538 static struct proc_xfs_info xfs_info_unset[] = {
539 /* the few simple ones we can get from the mount struct */
540 { XFS_MOUNT_COMPAT_IOSIZE, "," MNTOPT_LARGEIO },
541 { XFS_MOUNT_BARRIER, "," MNTOPT_NOBARRIER },
542 { XFS_MOUNT_SMALL_INUMS, "," MNTOPT_64BITINODE },
543 { 0, NULL }
544 };
545 struct proc_xfs_info *xfs_infop;
546
547 for (xfs_infop = xfs_info_set; xfs_infop->flag; xfs_infop++) {
548 if (mp->m_flags & xfs_infop->flag)
549 seq_puts(m, xfs_infop->str);
550 }
551 for (xfs_infop = xfs_info_unset; xfs_infop->flag; xfs_infop++) {
552 if (!(mp->m_flags & xfs_infop->flag))
553 seq_puts(m, xfs_infop->str);
554 }
555
556 if (mp->m_flags & XFS_MOUNT_DFLT_IOSIZE)
557 seq_printf(m, "," MNTOPT_ALLOCSIZE "=%dk",
558 (int)(1 << mp->m_writeio_log) >> 10);
559
560 if (mp->m_logbufs > 0)
561 seq_printf(m, "," MNTOPT_LOGBUFS "=%d", mp->m_logbufs);
562 if (mp->m_logbsize > 0)
563 seq_printf(m, "," MNTOPT_LOGBSIZE "=%dk", mp->m_logbsize >> 10);
564
565 if (mp->m_logname)
566 seq_printf(m, "," MNTOPT_LOGDEV "=%s", mp->m_logname);
567 if (mp->m_rtname)
568 seq_printf(m, "," MNTOPT_RTDEV "=%s", mp->m_rtname);
569
570 if (mp->m_dalign > 0)
571 seq_printf(m, "," MNTOPT_SUNIT "=%d",
572 (int)XFS_FSB_TO_BB(mp, mp->m_dalign));
573 if (mp->m_swidth > 0)
574 seq_printf(m, "," MNTOPT_SWIDTH "=%d",
575 (int)XFS_FSB_TO_BB(mp, mp->m_swidth));
576
577 if (mp->m_qflags & (XFS_UQUOTA_ACCT|XFS_UQUOTA_ENFD))
578 seq_puts(m, "," MNTOPT_USRQUOTA);
579 else if (mp->m_qflags & XFS_UQUOTA_ACCT)
580 seq_puts(m, "," MNTOPT_UQUOTANOENF);
581
582 /* Either project or group quotas can be active, not both */
583
584 if (mp->m_qflags & XFS_PQUOTA_ACCT) {
585 if (mp->m_qflags & XFS_OQUOTA_ENFD)
586 seq_puts(m, "," MNTOPT_PRJQUOTA);
587 else
588 seq_puts(m, "," MNTOPT_PQUOTANOENF);
589 } else if (mp->m_qflags & XFS_GQUOTA_ACCT) {
590 if (mp->m_qflags & XFS_OQUOTA_ENFD)
591 seq_puts(m, "," MNTOPT_GRPQUOTA);
592 else
593 seq_puts(m, "," MNTOPT_GQUOTANOENF);
594 }
595
596 if (!(mp->m_qflags & XFS_ALL_QUOTA_ACCT))
597 seq_puts(m, "," MNTOPT_NOQUOTA);
598
599 return 0;
600 }
601 __uint64_t
602 xfs_max_file_offset(
603 unsigned int blockshift)
604 {
605 unsigned int pagefactor = 1;
606 unsigned int bitshift = BITS_PER_LONG - 1;
607
608 /* Figure out maximum filesize, on Linux this can depend on
609 * the filesystem blocksize (on 32 bit platforms).
610 * __block_prepare_write does this in an [unsigned] long...
611 * page->index << (PAGE_CACHE_SHIFT - bbits)
612 * So, for page sized blocks (4K on 32 bit platforms),
613 * this wraps at around 8Tb (hence MAX_LFS_FILESIZE which is
614 * (((u64)PAGE_CACHE_SIZE << (BITS_PER_LONG-1))-1)
615 * but for smaller blocksizes it is less (bbits = log2 bsize).
616 * Note1: get_block_t takes a long (implicit cast from above)
617 * Note2: The Large Block Device (LBD and HAVE_SECTOR_T) patch
618 * can optionally convert the [unsigned] long from above into
619 * an [unsigned] long long.
620 */
621
622 #if BITS_PER_LONG == 32
623 # if defined(CONFIG_LBDAF)
624 ASSERT(sizeof(sector_t) == 8);
625 pagefactor = PAGE_CACHE_SIZE;
626 bitshift = BITS_PER_LONG;
627 # else
628 pagefactor = PAGE_CACHE_SIZE >> (PAGE_CACHE_SHIFT - blockshift);
629 # endif
630 #endif
631
632 return (((__uint64_t)pagefactor) << bitshift) - 1;
633 }
634
635 STATIC int
636 xfs_blkdev_get(
637 xfs_mount_t *mp,
638 const char *name,
639 struct block_device **bdevp)
640 {
641 int error = 0;
642
643 *bdevp = open_bdev_exclusive(name, FMODE_READ|FMODE_WRITE, mp);
644 if (IS_ERR(*bdevp)) {
645 error = PTR_ERR(*bdevp);
646 printk("XFS: Invalid device [%s], error=%d\n", name, error);
647 }
648
649 return -error;
650 }
651
652 STATIC void
653 xfs_blkdev_put(
654 struct block_device *bdev)
655 {
656 if (bdev)
657 close_bdev_exclusive(bdev, FMODE_READ|FMODE_WRITE);
658 }
659
660 /*
661 * Try to write out the superblock using barriers.
662 */
663 STATIC int
664 xfs_barrier_test(
665 xfs_mount_t *mp)
666 {
667 xfs_buf_t *sbp = xfs_getsb(mp, 0);
668 int error;
669
670 XFS_BUF_UNDONE(sbp);
671 XFS_BUF_UNREAD(sbp);
672 XFS_BUF_UNDELAYWRITE(sbp);
673 XFS_BUF_WRITE(sbp);
674 XFS_BUF_UNASYNC(sbp);
675 XFS_BUF_ORDERED(sbp);
676
677 xfsbdstrat(mp, sbp);
678 error = xfs_iowait(sbp);
679
680 /*
681 * Clear all the flags we set and possible error state in the
682 * buffer. We only did the write to try out whether barriers
683 * worked and shouldn't leave any traces in the superblock
684 * buffer.
685 */
686 XFS_BUF_DONE(sbp);
687 XFS_BUF_ERROR(sbp, 0);
688 XFS_BUF_UNORDERED(sbp);
689
690 xfs_buf_relse(sbp);
691 return error;
692 }
693
694 STATIC void
695 xfs_mountfs_check_barriers(xfs_mount_t *mp)
696 {
697 int error;
698
699 if (mp->m_logdev_targp != mp->m_ddev_targp) {
700 xfs_fs_cmn_err(CE_NOTE, mp,
701 "Disabling barriers, not supported with external log device");
702 mp->m_flags &= ~XFS_MOUNT_BARRIER;
703 return;
704 }
705
706 if (xfs_readonly_buftarg(mp->m_ddev_targp)) {
707 xfs_fs_cmn_err(CE_NOTE, mp,
708 "Disabling barriers, underlying device is readonly");
709 mp->m_flags &= ~XFS_MOUNT_BARRIER;
710 return;
711 }
712
713 error = xfs_barrier_test(mp);
714 if (error) {
715 xfs_fs_cmn_err(CE_NOTE, mp,
716 "Disabling barriers, trial barrier write failed");
717 mp->m_flags &= ~XFS_MOUNT_BARRIER;
718 return;
719 }
720 }
721
722 void
723 xfs_blkdev_issue_flush(
724 xfs_buftarg_t *buftarg)
725 {
726 blkdev_issue_flush(buftarg->bt_bdev, NULL);
727 }
728
729 STATIC void
730 xfs_close_devices(
731 struct xfs_mount *mp)
732 {
733 if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp) {
734 struct block_device *logdev = mp->m_logdev_targp->bt_bdev;
735 xfs_free_buftarg(mp, mp->m_logdev_targp);
736 xfs_blkdev_put(logdev);
737 }
738 if (mp->m_rtdev_targp) {
739 struct block_device *rtdev = mp->m_rtdev_targp->bt_bdev;
740 xfs_free_buftarg(mp, mp->m_rtdev_targp);
741 xfs_blkdev_put(rtdev);
742 }
743 xfs_free_buftarg(mp, mp->m_ddev_targp);
744 }
745
746 /*
747 * The file system configurations are:
748 * (1) device (partition) with data and internal log
749 * (2) logical volume with data and log subvolumes.
750 * (3) logical volume with data, log, and realtime subvolumes.
751 *
752 * We only have to handle opening the log and realtime volumes here if
753 * they are present. The data subvolume has already been opened by
754 * get_sb_bdev() and is stored in sb->s_bdev.
755 */
756 STATIC int
757 xfs_open_devices(
758 struct xfs_mount *mp)
759 {
760 struct block_device *ddev = mp->m_super->s_bdev;
761 struct block_device *logdev = NULL, *rtdev = NULL;
762 int error;
763
764 /*
765 * Open real time and log devices - order is important.
766 */
767 if (mp->m_logname) {
768 error = xfs_blkdev_get(mp, mp->m_logname, &logdev);
769 if (error)
770 goto out;
771 }
772
773 if (mp->m_rtname) {
774 error = xfs_blkdev_get(mp, mp->m_rtname, &rtdev);
775 if (error)
776 goto out_close_logdev;
777
778 if (rtdev == ddev || rtdev == logdev) {
779 cmn_err(CE_WARN,
780 "XFS: Cannot mount filesystem with identical rtdev and ddev/logdev.");
781 error = EINVAL;
782 goto out_close_rtdev;
783 }
784 }
785
786 /*
787 * Setup xfs_mount buffer target pointers
788 */
789 error = ENOMEM;
790 mp->m_ddev_targp = xfs_alloc_buftarg(ddev, 0);
791 if (!mp->m_ddev_targp)
792 goto out_close_rtdev;
793
794 if (rtdev) {
795 mp->m_rtdev_targp = xfs_alloc_buftarg(rtdev, 1);
796 if (!mp->m_rtdev_targp)
797 goto out_free_ddev_targ;
798 }
799
800 if (logdev && logdev != ddev) {
801 mp->m_logdev_targp = xfs_alloc_buftarg(logdev, 1);
802 if (!mp->m_logdev_targp)
803 goto out_free_rtdev_targ;
804 } else {
805 mp->m_logdev_targp = mp->m_ddev_targp;
806 }
807
808 return 0;
809
810 out_free_rtdev_targ:
811 if (mp->m_rtdev_targp)
812 xfs_free_buftarg(mp, mp->m_rtdev_targp);
813 out_free_ddev_targ:
814 xfs_free_buftarg(mp, mp->m_ddev_targp);
815 out_close_rtdev:
816 if (rtdev)
817 xfs_blkdev_put(rtdev);
818 out_close_logdev:
819 if (logdev && logdev != ddev)
820 xfs_blkdev_put(logdev);
821 out:
822 return error;
823 }
824
825 /*
826 * Setup xfs_mount buffer target pointers based on superblock
827 */
828 STATIC int
829 xfs_setup_devices(
830 struct xfs_mount *mp)
831 {
832 int error;
833
834 error = xfs_setsize_buftarg(mp->m_ddev_targp, mp->m_sb.sb_blocksize,
835 mp->m_sb.sb_sectsize);
836 if (error)
837 return error;
838
839 if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp) {
840 unsigned int log_sector_size = BBSIZE;
841
842 if (xfs_sb_version_hassector(&mp->m_sb))
843 log_sector_size = mp->m_sb.sb_logsectsize;
844 error = xfs_setsize_buftarg(mp->m_logdev_targp,
845 mp->m_sb.sb_blocksize,
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_blocksize,
853 mp->m_sb.sb_sectsize);
854 if (error)
855 return error;
856 }
857
858 return 0;
859 }
860
861 /*
862 * XFS AIL push thread support
863 */
864 void
865 xfsaild_wakeup(
866 struct xfs_ail *ailp,
867 xfs_lsn_t threshold_lsn)
868 {
869 ailp->xa_target = threshold_lsn;
870 wake_up_process(ailp->xa_task);
871 }
872
873 STATIC int
874 xfsaild(
875 void *data)
876 {
877 struct xfs_ail *ailp = data;
878 xfs_lsn_t last_pushed_lsn = 0;
879 long tout = 0;
880
881 while (!kthread_should_stop()) {
882 if (tout)
883 schedule_timeout_interruptible(msecs_to_jiffies(tout));
884 tout = 1000;
885
886 /* swsusp */
887 try_to_freeze();
888
889 ASSERT(ailp->xa_mount->m_log);
890 if (XFS_FORCED_SHUTDOWN(ailp->xa_mount))
891 continue;
892
893 tout = xfsaild_push(ailp, &last_pushed_lsn);
894 }
895
896 return 0;
897 } /* xfsaild */
898
899 int
900 xfsaild_start(
901 struct xfs_ail *ailp)
902 {
903 ailp->xa_target = 0;
904 ailp->xa_task = kthread_run(xfsaild, ailp, "xfsaild");
905 if (IS_ERR(ailp->xa_task))
906 return -PTR_ERR(ailp->xa_task);
907 return 0;
908 }
909
910 void
911 xfsaild_stop(
912 struct xfs_ail *ailp)
913 {
914 kthread_stop(ailp->xa_task);
915 }
916
917
918 /* Catch misguided souls that try to use this interface on XFS */
919 STATIC struct inode *
920 xfs_fs_alloc_inode(
921 struct super_block *sb)
922 {
923 BUG();
924 return NULL;
925 }
926
927 /*
928 * Now that the generic code is guaranteed not to be accessing
929 * the linux inode, we can reclaim the inode.
930 */
931 STATIC void
932 xfs_fs_destroy_inode(
933 struct inode *inode)
934 {
935 struct xfs_inode *ip = XFS_I(inode);
936
937 xfs_itrace_entry(ip);
938
939 XFS_STATS_INC(vn_reclaim);
940
941 /* bad inode, get out here ASAP */
942 if (is_bad_inode(inode))
943 goto out_reclaim;
944
945 xfs_ioend_wait(ip);
946
947 ASSERT(XFS_FORCED_SHUTDOWN(ip->i_mount) || ip->i_delayed_blks == 0);
948
949 /*
950 * We should never get here with one of the reclaim flags already set.
951 */
952 ASSERT_ALWAYS(!xfs_iflags_test(ip, XFS_IRECLAIMABLE));
953 ASSERT_ALWAYS(!xfs_iflags_test(ip, XFS_IRECLAIM));
954
955 /*
956 * If we have nothing to flush with this inode then complete the
957 * teardown now, otherwise delay the flush operation.
958 */
959 if (!xfs_inode_clean(ip)) {
960 xfs_inode_set_reclaim_tag(ip);
961 return;
962 }
963
964 out_reclaim:
965 xfs_ireclaim(ip);
966 }
967
968 /*
969 * Slab object creation initialisation for the XFS inode.
970 * This covers only the idempotent fields in the XFS inode;
971 * all other fields need to be initialised on allocation
972 * from the slab. This avoids the need to repeatedly intialise
973 * fields in the xfs inode that left in the initialise state
974 * when freeing the inode.
975 */
976 STATIC void
977 xfs_fs_inode_init_once(
978 void *inode)
979 {
980 struct xfs_inode *ip = inode;
981
982 memset(ip, 0, sizeof(struct xfs_inode));
983
984 /* vfs inode */
985 inode_init_once(VFS_I(ip));
986
987 /* xfs inode */
988 atomic_set(&ip->i_iocount, 0);
989 atomic_set(&ip->i_pincount, 0);
990 spin_lock_init(&ip->i_flags_lock);
991 init_waitqueue_head(&ip->i_ipin_wait);
992 /*
993 * Because we want to use a counting completion, complete
994 * the flush completion once to allow a single access to
995 * the flush completion without blocking.
996 */
997 init_completion(&ip->i_flush);
998 complete(&ip->i_flush);
999
1000 mrlock_init(&ip->i_lock, MRLOCK_ALLOW_EQUAL_PRI|MRLOCK_BARRIER,
1001 "xfsino", ip->i_ino);
1002 }
1003
1004 /*
1005 * Dirty the XFS inode when mark_inode_dirty_sync() is called so that
1006 * we catch unlogged VFS level updates to the inode. Care must be taken
1007 * here - the transaction code calls mark_inode_dirty_sync() to mark the
1008 * VFS inode dirty in a transaction and clears the i_update_core field;
1009 * it must clear the field after calling mark_inode_dirty_sync() to
1010 * correctly indicate that the dirty state has been propagated into the
1011 * inode log item.
1012 *
1013 * We need the barrier() to maintain correct ordering between unlogged
1014 * updates and the transaction commit code that clears the i_update_core
1015 * field. This requires all updates to be completed before marking the
1016 * inode dirty.
1017 */
1018 STATIC void
1019 xfs_fs_dirty_inode(
1020 struct inode *inode)
1021 {
1022 barrier();
1023 XFS_I(inode)->i_update_core = 1;
1024 }
1025
1026 /*
1027 * Attempt to flush the inode, this will actually fail
1028 * if the inode is pinned, but we dirty the inode again
1029 * at the point when it is unpinned after a log write,
1030 * since this is when the inode itself becomes flushable.
1031 */
1032 STATIC int
1033 xfs_fs_write_inode(
1034 struct inode *inode,
1035 int sync)
1036 {
1037 struct xfs_inode *ip = XFS_I(inode);
1038 struct xfs_mount *mp = ip->i_mount;
1039 int error = 0;
1040
1041 xfs_itrace_entry(ip);
1042
1043 if (XFS_FORCED_SHUTDOWN(mp))
1044 return XFS_ERROR(EIO);
1045
1046 if (sync) {
1047 error = xfs_wait_on_pages(ip, 0, -1);
1048 if (error)
1049 goto out;
1050 }
1051
1052 /*
1053 * Bypass inodes which have already been cleaned by
1054 * the inode flush clustering code inside xfs_iflush
1055 */
1056 if (xfs_inode_clean(ip))
1057 goto out;
1058
1059 /*
1060 * We make this non-blocking if the inode is contended, return
1061 * EAGAIN to indicate to the caller that they did not succeed.
1062 * This prevents the flush path from blocking on inodes inside
1063 * another operation right now, they get caught later by xfs_sync.
1064 */
1065 if (sync) {
1066 xfs_ilock(ip, XFS_ILOCK_SHARED);
1067 xfs_iflock(ip);
1068
1069 error = xfs_iflush(ip, XFS_IFLUSH_SYNC);
1070 } else {
1071 error = EAGAIN;
1072 if (!xfs_ilock_nowait(ip, XFS_ILOCK_SHARED))
1073 goto out;
1074 if (xfs_ipincount(ip) || !xfs_iflock_nowait(ip))
1075 goto out_unlock;
1076
1077 error = xfs_iflush(ip, XFS_IFLUSH_ASYNC_NOBLOCK);
1078 }
1079
1080 out_unlock:
1081 xfs_iunlock(ip, XFS_ILOCK_SHARED);
1082 out:
1083 /*
1084 * if we failed to write out the inode then mark
1085 * it dirty again so we'll try again later.
1086 */
1087 if (error)
1088 xfs_mark_inode_dirty_sync(ip);
1089 return -error;
1090 }
1091
1092 STATIC void
1093 xfs_fs_clear_inode(
1094 struct inode *inode)
1095 {
1096 xfs_inode_t *ip = XFS_I(inode);
1097
1098 xfs_itrace_entry(ip);
1099 XFS_STATS_INC(vn_rele);
1100 XFS_STATS_INC(vn_remove);
1101 XFS_STATS_DEC(vn_active);
1102
1103 /*
1104 * The iolock is used by the file system to coordinate reads,
1105 * writes, and block truncates. Up to this point the lock
1106 * protected concurrent accesses by users of the inode. But
1107 * from here forward we're doing some final processing of the
1108 * inode because we're done with it, and although we reuse the
1109 * iolock for protection it is really a distinct lock class
1110 * (in the lockdep sense) from before. To keep lockdep happy
1111 * (and basically indicate what we are doing), we explicitly
1112 * re-init the iolock here.
1113 */
1114 ASSERT(!rwsem_is_locked(&ip->i_iolock.mr_lock));
1115 mrlock_init(&ip->i_iolock, MRLOCK_BARRIER, "xfsio", ip->i_ino);
1116
1117 xfs_inactive(ip);
1118 }
1119
1120 STATIC void
1121 xfs_free_fsname(
1122 struct xfs_mount *mp)
1123 {
1124 kfree(mp->m_fsname);
1125 kfree(mp->m_rtname);
1126 kfree(mp->m_logname);
1127 }
1128
1129 STATIC void
1130 xfs_fs_put_super(
1131 struct super_block *sb)
1132 {
1133 struct xfs_mount *mp = XFS_M(sb);
1134
1135 xfs_syncd_stop(mp);
1136
1137 if (!(sb->s_flags & MS_RDONLY)) {
1138 /*
1139 * XXX(hch): this should be SYNC_WAIT.
1140 *
1141 * Or more likely not needed at all because the VFS is already
1142 * calling ->sync_fs after shutting down all filestem
1143 * operations and just before calling ->put_super.
1144 */
1145 xfs_sync_data(mp, 0);
1146 xfs_sync_attr(mp, 0);
1147 }
1148
1149 XFS_SEND_PREUNMOUNT(mp);
1150
1151 /*
1152 * Blow away any referenced inode in the filestreams cache.
1153 * This can and will cause log traffic as inodes go inactive
1154 * here.
1155 */
1156 xfs_filestream_unmount(mp);
1157
1158 XFS_bflush(mp->m_ddev_targp);
1159
1160 XFS_SEND_UNMOUNT(mp);
1161
1162 xfs_unmountfs(mp);
1163 xfs_freesb(mp);
1164 xfs_icsb_destroy_counters(mp);
1165 xfs_close_devices(mp);
1166 xfs_dmops_put(mp);
1167 xfs_free_fsname(mp);
1168 kfree(mp);
1169 }
1170
1171 STATIC int
1172 xfs_fs_sync_fs(
1173 struct super_block *sb,
1174 int wait)
1175 {
1176 struct xfs_mount *mp = XFS_M(sb);
1177 int error;
1178
1179 /*
1180 * Not much we can do for the first async pass. Writing out the
1181 * superblock would be counter-productive as we are going to redirty
1182 * when writing out other data and metadata (and writing out a single
1183 * block is quite fast anyway).
1184 *
1185 * Try to asynchronously kick off quota syncing at least.
1186 */
1187 if (!wait) {
1188 xfs_qm_sync(mp, SYNC_TRYLOCK);
1189 return 0;
1190 }
1191
1192 error = xfs_quiesce_data(mp);
1193 if (error)
1194 return -error;
1195
1196 if (laptop_mode) {
1197 int prev_sync_seq = mp->m_sync_seq;
1198
1199 /*
1200 * The disk must be active because we're syncing.
1201 * We schedule xfssyncd now (now that the disk is
1202 * active) instead of later (when it might not be).
1203 */
1204 wake_up_process(mp->m_sync_task);
1205 /*
1206 * We have to wait for the sync iteration to complete.
1207 * If we don't, the disk activity caused by the sync
1208 * will come after the sync is completed, and that
1209 * triggers another sync from laptop mode.
1210 */
1211 wait_event(mp->m_wait_single_sync_task,
1212 mp->m_sync_seq != prev_sync_seq);
1213 }
1214
1215 return 0;
1216 }
1217
1218 STATIC int
1219 xfs_fs_statfs(
1220 struct dentry *dentry,
1221 struct kstatfs *statp)
1222 {
1223 struct xfs_mount *mp = XFS_M(dentry->d_sb);
1224 xfs_sb_t *sbp = &mp->m_sb;
1225 struct xfs_inode *ip = XFS_I(dentry->d_inode);
1226 __uint64_t fakeinos, id;
1227 xfs_extlen_t lsize;
1228
1229 statp->f_type = XFS_SB_MAGIC;
1230 statp->f_namelen = MAXNAMELEN - 1;
1231
1232 id = huge_encode_dev(mp->m_ddev_targp->bt_dev);
1233 statp->f_fsid.val[0] = (u32)id;
1234 statp->f_fsid.val[1] = (u32)(id >> 32);
1235
1236 xfs_icsb_sync_counters(mp, XFS_ICSB_LAZY_COUNT);
1237
1238 spin_lock(&mp->m_sb_lock);
1239 statp->f_bsize = sbp->sb_blocksize;
1240 lsize = sbp->sb_logstart ? sbp->sb_logblocks : 0;
1241 statp->f_blocks = sbp->sb_dblocks - lsize;
1242 statp->f_bfree = statp->f_bavail =
1243 sbp->sb_fdblocks - XFS_ALLOC_SET_ASIDE(mp);
1244 fakeinos = statp->f_bfree << sbp->sb_inopblog;
1245 statp->f_files =
1246 MIN(sbp->sb_icount + fakeinos, (__uint64_t)XFS_MAXINUMBER);
1247 if (mp->m_maxicount)
1248 statp->f_files = min_t(typeof(statp->f_files),
1249 statp->f_files,
1250 mp->m_maxicount);
1251 statp->f_ffree = statp->f_files - (sbp->sb_icount - sbp->sb_ifree);
1252 spin_unlock(&mp->m_sb_lock);
1253
1254 if ((ip->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) ||
1255 ((mp->m_qflags & (XFS_PQUOTA_ACCT|XFS_OQUOTA_ENFD))) ==
1256 (XFS_PQUOTA_ACCT|XFS_OQUOTA_ENFD))
1257 xfs_qm_statvfs(ip, statp);
1258 return 0;
1259 }
1260
1261 STATIC int
1262 xfs_fs_remount(
1263 struct super_block *sb,
1264 int *flags,
1265 char *options)
1266 {
1267 struct xfs_mount *mp = XFS_M(sb);
1268 substring_t args[MAX_OPT_ARGS];
1269 char *p;
1270 int error;
1271
1272 while ((p = strsep(&options, ",")) != NULL) {
1273 int token;
1274
1275 if (!*p)
1276 continue;
1277
1278 token = match_token(p, tokens, args);
1279 switch (token) {
1280 case Opt_barrier:
1281 mp->m_flags |= XFS_MOUNT_BARRIER;
1282
1283 /*
1284 * Test if barriers are actually working if we can,
1285 * else delay this check until the filesystem is
1286 * marked writeable.
1287 */
1288 if (!(mp->m_flags & XFS_MOUNT_RDONLY))
1289 xfs_mountfs_check_barriers(mp);
1290 break;
1291 case Opt_nobarrier:
1292 mp->m_flags &= ~XFS_MOUNT_BARRIER;
1293 break;
1294 default:
1295 /*
1296 * Logically we would return an error here to prevent
1297 * users from believing they might have changed
1298 * mount options using remount which can't be changed.
1299 *
1300 * But unfortunately mount(8) adds all options from
1301 * mtab and fstab to the mount arguments in some cases
1302 * so we can't blindly reject options, but have to
1303 * check for each specified option if it actually
1304 * differs from the currently set option and only
1305 * reject it if that's the case.
1306 *
1307 * Until that is implemented we return success for
1308 * every remount request, and silently ignore all
1309 * options that we can't actually change.
1310 */
1311 #if 0
1312 printk(KERN_INFO
1313 "XFS: mount option \"%s\" not supported for remount\n", p);
1314 return -EINVAL;
1315 #else
1316 break;
1317 #endif
1318 }
1319 }
1320
1321 /* ro -> rw */
1322 if ((mp->m_flags & XFS_MOUNT_RDONLY) && !(*flags & MS_RDONLY)) {
1323 mp->m_flags &= ~XFS_MOUNT_RDONLY;
1324 if (mp->m_flags & XFS_MOUNT_BARRIER)
1325 xfs_mountfs_check_barriers(mp);
1326
1327 /*
1328 * If this is the first remount to writeable state we
1329 * might have some superblock changes to update.
1330 */
1331 if (mp->m_update_flags) {
1332 error = xfs_mount_log_sb(mp, mp->m_update_flags);
1333 if (error) {
1334 cmn_err(CE_WARN,
1335 "XFS: failed to write sb changes");
1336 return error;
1337 }
1338 mp->m_update_flags = 0;
1339 }
1340 }
1341
1342 /* rw -> ro */
1343 if (!(mp->m_flags & XFS_MOUNT_RDONLY) && (*flags & MS_RDONLY)) {
1344 xfs_quiesce_data(mp);
1345 xfs_quiesce_attr(mp);
1346 mp->m_flags |= XFS_MOUNT_RDONLY;
1347 }
1348
1349 return 0;
1350 }
1351
1352 /*
1353 * Second stage of a freeze. The data is already frozen so we only
1354 * need to take care of the metadata. Once that's done write a dummy
1355 * record to dirty the log in case of a crash while frozen.
1356 */
1357 STATIC int
1358 xfs_fs_freeze(
1359 struct super_block *sb)
1360 {
1361 struct xfs_mount *mp = XFS_M(sb);
1362
1363 xfs_quiesce_attr(mp);
1364 return -xfs_fs_log_dummy(mp);
1365 }
1366
1367 STATIC int
1368 xfs_fs_show_options(
1369 struct seq_file *m,
1370 struct vfsmount *mnt)
1371 {
1372 return -xfs_showargs(XFS_M(mnt->mnt_sb), m);
1373 }
1374
1375 /*
1376 * This function fills in xfs_mount_t fields based on mount args.
1377 * Note: the superblock _has_ now been read in.
1378 */
1379 STATIC int
1380 xfs_finish_flags(
1381 struct xfs_mount *mp)
1382 {
1383 int ronly = (mp->m_flags & XFS_MOUNT_RDONLY);
1384
1385 /* Fail a mount where the logbuf is smaller than the log stripe */
1386 if (xfs_sb_version_haslogv2(&mp->m_sb)) {
1387 if (mp->m_logbsize <= 0 &&
1388 mp->m_sb.sb_logsunit > XLOG_BIG_RECORD_BSIZE) {
1389 mp->m_logbsize = mp->m_sb.sb_logsunit;
1390 } else if (mp->m_logbsize > 0 &&
1391 mp->m_logbsize < mp->m_sb.sb_logsunit) {
1392 cmn_err(CE_WARN,
1393 "XFS: logbuf size must be greater than or equal to log stripe size");
1394 return XFS_ERROR(EINVAL);
1395 }
1396 } else {
1397 /* Fail a mount if the logbuf is larger than 32K */
1398 if (mp->m_logbsize > XLOG_BIG_RECORD_BSIZE) {
1399 cmn_err(CE_WARN,
1400 "XFS: logbuf size for version 1 logs must be 16K or 32K");
1401 return XFS_ERROR(EINVAL);
1402 }
1403 }
1404
1405 /*
1406 * mkfs'ed attr2 will turn on attr2 mount unless explicitly
1407 * told by noattr2 to turn it off
1408 */
1409 if (xfs_sb_version_hasattr2(&mp->m_sb) &&
1410 !(mp->m_flags & XFS_MOUNT_NOATTR2))
1411 mp->m_flags |= XFS_MOUNT_ATTR2;
1412
1413 /*
1414 * prohibit r/w mounts of read-only filesystems
1415 */
1416 if ((mp->m_sb.sb_flags & XFS_SBF_READONLY) && !ronly) {
1417 cmn_err(CE_WARN,
1418 "XFS: cannot mount a read-only filesystem as read-write");
1419 return XFS_ERROR(EROFS);
1420 }
1421
1422 return 0;
1423 }
1424
1425 STATIC int
1426 xfs_fs_fill_super(
1427 struct super_block *sb,
1428 void *data,
1429 int silent)
1430 {
1431 struct inode *root;
1432 struct xfs_mount *mp = NULL;
1433 int flags = 0, error = ENOMEM;
1434 char *mtpt = NULL;
1435
1436 mp = kzalloc(sizeof(struct xfs_mount), GFP_KERNEL);
1437 if (!mp)
1438 goto out;
1439
1440 spin_lock_init(&mp->m_sb_lock);
1441 mutex_init(&mp->m_growlock);
1442 atomic_set(&mp->m_active_trans, 0);
1443 INIT_LIST_HEAD(&mp->m_sync_list);
1444 spin_lock_init(&mp->m_sync_lock);
1445 init_waitqueue_head(&mp->m_wait_single_sync_task);
1446
1447 mp->m_super = sb;
1448 sb->s_fs_info = mp;
1449
1450 error = xfs_parseargs(mp, (char *)data, &mtpt);
1451 if (error)
1452 goto out_free_fsname;
1453
1454 sb_min_blocksize(sb, BBSIZE);
1455 sb->s_xattr = xfs_xattr_handlers;
1456 sb->s_export_op = &xfs_export_operations;
1457 #ifdef CONFIG_XFS_QUOTA
1458 sb->s_qcop = &xfs_quotactl_operations;
1459 #endif
1460 sb->s_op = &xfs_super_operations;
1461
1462 error = xfs_dmops_get(mp);
1463 if (error)
1464 goto out_free_fsname;
1465
1466 if (silent)
1467 flags |= XFS_MFSI_QUIET;
1468
1469 error = xfs_open_devices(mp);
1470 if (error)
1471 goto out_put_dmops;
1472
1473 if (xfs_icsb_init_counters(mp))
1474 mp->m_flags |= XFS_MOUNT_NO_PERCPU_SB;
1475
1476 error = xfs_readsb(mp, flags);
1477 if (error)
1478 goto out_destroy_counters;
1479
1480 error = xfs_finish_flags(mp);
1481 if (error)
1482 goto out_free_sb;
1483
1484 error = xfs_setup_devices(mp);
1485 if (error)
1486 goto out_free_sb;
1487
1488 if (mp->m_flags & XFS_MOUNT_BARRIER)
1489 xfs_mountfs_check_barriers(mp);
1490
1491 error = xfs_filestream_mount(mp);
1492 if (error)
1493 goto out_free_sb;
1494
1495 error = xfs_mountfs(mp);
1496 if (error)
1497 goto out_filestream_unmount;
1498
1499 XFS_SEND_MOUNT(mp, DM_RIGHT_NULL, mtpt, mp->m_fsname);
1500
1501 sb->s_magic = XFS_SB_MAGIC;
1502 sb->s_blocksize = mp->m_sb.sb_blocksize;
1503 sb->s_blocksize_bits = ffs(sb->s_blocksize) - 1;
1504 sb->s_maxbytes = xfs_max_file_offset(sb->s_blocksize_bits);
1505 sb->s_time_gran = 1;
1506 set_posix_acl_flag(sb);
1507
1508 root = igrab(VFS_I(mp->m_rootip));
1509 if (!root) {
1510 error = ENOENT;
1511 goto fail_unmount;
1512 }
1513 if (is_bad_inode(root)) {
1514 error = EINVAL;
1515 goto fail_vnrele;
1516 }
1517 sb->s_root = d_alloc_root(root);
1518 if (!sb->s_root) {
1519 error = ENOMEM;
1520 goto fail_vnrele;
1521 }
1522
1523 error = xfs_syncd_init(mp);
1524 if (error)
1525 goto fail_vnrele;
1526
1527 kfree(mtpt);
1528
1529 xfs_itrace_exit(XFS_I(sb->s_root->d_inode));
1530 return 0;
1531
1532 out_filestream_unmount:
1533 xfs_filestream_unmount(mp);
1534 out_free_sb:
1535 xfs_freesb(mp);
1536 out_destroy_counters:
1537 xfs_icsb_destroy_counters(mp);
1538 xfs_close_devices(mp);
1539 out_put_dmops:
1540 xfs_dmops_put(mp);
1541 out_free_fsname:
1542 xfs_free_fsname(mp);
1543 kfree(mtpt);
1544 kfree(mp);
1545 out:
1546 return -error;
1547
1548 fail_vnrele:
1549 if (sb->s_root) {
1550 dput(sb->s_root);
1551 sb->s_root = NULL;
1552 } else {
1553 iput(root);
1554 }
1555
1556 fail_unmount:
1557 /*
1558 * Blow away any referenced inode in the filestreams cache.
1559 * This can and will cause log traffic as inodes go inactive
1560 * here.
1561 */
1562 xfs_filestream_unmount(mp);
1563
1564 XFS_bflush(mp->m_ddev_targp);
1565
1566 xfs_unmountfs(mp);
1567 goto out_free_sb;
1568 }
1569
1570 STATIC int
1571 xfs_fs_get_sb(
1572 struct file_system_type *fs_type,
1573 int flags,
1574 const char *dev_name,
1575 void *data,
1576 struct vfsmount *mnt)
1577 {
1578 return get_sb_bdev(fs_type, flags, dev_name, data, xfs_fs_fill_super,
1579 mnt);
1580 }
1581
1582 static const struct super_operations xfs_super_operations = {
1583 .alloc_inode = xfs_fs_alloc_inode,
1584 .destroy_inode = xfs_fs_destroy_inode,
1585 .dirty_inode = xfs_fs_dirty_inode,
1586 .write_inode = xfs_fs_write_inode,
1587 .clear_inode = xfs_fs_clear_inode,
1588 .put_super = xfs_fs_put_super,
1589 .sync_fs = xfs_fs_sync_fs,
1590 .freeze_fs = xfs_fs_freeze,
1591 .statfs = xfs_fs_statfs,
1592 .remount_fs = xfs_fs_remount,
1593 .show_options = xfs_fs_show_options,
1594 };
1595
1596 static struct file_system_type xfs_fs_type = {
1597 .owner = THIS_MODULE,
1598 .name = "xfs",
1599 .get_sb = xfs_fs_get_sb,
1600 .kill_sb = kill_block_super,
1601 .fs_flags = FS_REQUIRES_DEV,
1602 };
1603
1604 STATIC int __init
1605 xfs_alloc_trace_bufs(void)
1606 {
1607 #ifdef XFS_ALLOC_TRACE
1608 xfs_alloc_trace_buf = ktrace_alloc(XFS_ALLOC_TRACE_SIZE, KM_MAYFAIL);
1609 if (!xfs_alloc_trace_buf)
1610 goto out;
1611 #endif
1612 #ifdef XFS_BMAP_TRACE
1613 xfs_bmap_trace_buf = ktrace_alloc(XFS_BMAP_TRACE_SIZE, KM_MAYFAIL);
1614 if (!xfs_bmap_trace_buf)
1615 goto out_free_alloc_trace;
1616 #endif
1617 #ifdef XFS_BTREE_TRACE
1618 xfs_allocbt_trace_buf = ktrace_alloc(XFS_ALLOCBT_TRACE_SIZE,
1619 KM_MAYFAIL);
1620 if (!xfs_allocbt_trace_buf)
1621 goto out_free_bmap_trace;
1622
1623 xfs_inobt_trace_buf = ktrace_alloc(XFS_INOBT_TRACE_SIZE, KM_MAYFAIL);
1624 if (!xfs_inobt_trace_buf)
1625 goto out_free_allocbt_trace;
1626
1627 xfs_bmbt_trace_buf = ktrace_alloc(XFS_BMBT_TRACE_SIZE, KM_MAYFAIL);
1628 if (!xfs_bmbt_trace_buf)
1629 goto out_free_inobt_trace;
1630 #endif
1631 #ifdef XFS_ATTR_TRACE
1632 xfs_attr_trace_buf = ktrace_alloc(XFS_ATTR_TRACE_SIZE, KM_MAYFAIL);
1633 if (!xfs_attr_trace_buf)
1634 goto out_free_bmbt_trace;
1635 #endif
1636 #ifdef XFS_DIR2_TRACE
1637 xfs_dir2_trace_buf = ktrace_alloc(XFS_DIR2_GTRACE_SIZE, KM_MAYFAIL);
1638 if (!xfs_dir2_trace_buf)
1639 goto out_free_attr_trace;
1640 #endif
1641
1642 return 0;
1643
1644 #ifdef XFS_DIR2_TRACE
1645 out_free_attr_trace:
1646 #endif
1647 #ifdef XFS_ATTR_TRACE
1648 ktrace_free(xfs_attr_trace_buf);
1649 out_free_bmbt_trace:
1650 #endif
1651 #ifdef XFS_BTREE_TRACE
1652 ktrace_free(xfs_bmbt_trace_buf);
1653 out_free_inobt_trace:
1654 ktrace_free(xfs_inobt_trace_buf);
1655 out_free_allocbt_trace:
1656 ktrace_free(xfs_allocbt_trace_buf);
1657 out_free_bmap_trace:
1658 #endif
1659 #ifdef XFS_BMAP_TRACE
1660 ktrace_free(xfs_bmap_trace_buf);
1661 out_free_alloc_trace:
1662 #endif
1663 #ifdef XFS_ALLOC_TRACE
1664 ktrace_free(xfs_alloc_trace_buf);
1665 out:
1666 #endif
1667 return -ENOMEM;
1668 }
1669
1670 STATIC void
1671 xfs_free_trace_bufs(void)
1672 {
1673 #ifdef XFS_DIR2_TRACE
1674 ktrace_free(xfs_dir2_trace_buf);
1675 #endif
1676 #ifdef XFS_ATTR_TRACE
1677 ktrace_free(xfs_attr_trace_buf);
1678 #endif
1679 #ifdef XFS_BTREE_TRACE
1680 ktrace_free(xfs_bmbt_trace_buf);
1681 ktrace_free(xfs_inobt_trace_buf);
1682 ktrace_free(xfs_allocbt_trace_buf);
1683 #endif
1684 #ifdef XFS_BMAP_TRACE
1685 ktrace_free(xfs_bmap_trace_buf);
1686 #endif
1687 #ifdef XFS_ALLOC_TRACE
1688 ktrace_free(xfs_alloc_trace_buf);
1689 #endif
1690 }
1691
1692 STATIC int __init
1693 xfs_init_zones(void)
1694 {
1695
1696 xfs_ioend_zone = kmem_zone_init(sizeof(xfs_ioend_t), "xfs_ioend");
1697 if (!xfs_ioend_zone)
1698 goto out;
1699
1700 xfs_ioend_pool = mempool_create_slab_pool(4 * MAX_BUF_PER_PAGE,
1701 xfs_ioend_zone);
1702 if (!xfs_ioend_pool)
1703 goto out_destroy_ioend_zone;
1704
1705 xfs_log_ticket_zone = kmem_zone_init(sizeof(xlog_ticket_t),
1706 "xfs_log_ticket");
1707 if (!xfs_log_ticket_zone)
1708 goto out_destroy_ioend_pool;
1709
1710 xfs_bmap_free_item_zone = kmem_zone_init(sizeof(xfs_bmap_free_item_t),
1711 "xfs_bmap_free_item");
1712 if (!xfs_bmap_free_item_zone)
1713 goto out_destroy_log_ticket_zone;
1714
1715 xfs_btree_cur_zone = kmem_zone_init(sizeof(xfs_btree_cur_t),
1716 "xfs_btree_cur");
1717 if (!xfs_btree_cur_zone)
1718 goto out_destroy_bmap_free_item_zone;
1719
1720 xfs_da_state_zone = kmem_zone_init(sizeof(xfs_da_state_t),
1721 "xfs_da_state");
1722 if (!xfs_da_state_zone)
1723 goto out_destroy_btree_cur_zone;
1724
1725 xfs_dabuf_zone = kmem_zone_init(sizeof(xfs_dabuf_t), "xfs_dabuf");
1726 if (!xfs_dabuf_zone)
1727 goto out_destroy_da_state_zone;
1728
1729 xfs_ifork_zone = kmem_zone_init(sizeof(xfs_ifork_t), "xfs_ifork");
1730 if (!xfs_ifork_zone)
1731 goto out_destroy_dabuf_zone;
1732
1733 xfs_trans_zone = kmem_zone_init(sizeof(xfs_trans_t), "xfs_trans");
1734 if (!xfs_trans_zone)
1735 goto out_destroy_ifork_zone;
1736
1737 /*
1738 * The size of the zone allocated buf log item is the maximum
1739 * size possible under XFS. This wastes a little bit of memory,
1740 * but it is much faster.
1741 */
1742 xfs_buf_item_zone = kmem_zone_init((sizeof(xfs_buf_log_item_t) +
1743 (((XFS_MAX_BLOCKSIZE / XFS_BLI_CHUNK) /
1744 NBWORD) * sizeof(int))), "xfs_buf_item");
1745 if (!xfs_buf_item_zone)
1746 goto out_destroy_trans_zone;
1747
1748 xfs_efd_zone = kmem_zone_init((sizeof(xfs_efd_log_item_t) +
1749 ((XFS_EFD_MAX_FAST_EXTENTS - 1) *
1750 sizeof(xfs_extent_t))), "xfs_efd_item");
1751 if (!xfs_efd_zone)
1752 goto out_destroy_buf_item_zone;
1753
1754 xfs_efi_zone = kmem_zone_init((sizeof(xfs_efi_log_item_t) +
1755 ((XFS_EFI_MAX_FAST_EXTENTS - 1) *
1756 sizeof(xfs_extent_t))), "xfs_efi_item");
1757 if (!xfs_efi_zone)
1758 goto out_destroy_efd_zone;
1759
1760 xfs_inode_zone =
1761 kmem_zone_init_flags(sizeof(xfs_inode_t), "xfs_inode",
1762 KM_ZONE_HWALIGN | KM_ZONE_RECLAIM | KM_ZONE_SPREAD,
1763 xfs_fs_inode_init_once);
1764 if (!xfs_inode_zone)
1765 goto out_destroy_efi_zone;
1766
1767 xfs_ili_zone =
1768 kmem_zone_init_flags(sizeof(xfs_inode_log_item_t), "xfs_ili",
1769 KM_ZONE_SPREAD, NULL);
1770 if (!xfs_ili_zone)
1771 goto out_destroy_inode_zone;
1772
1773 return 0;
1774
1775 out_destroy_inode_zone:
1776 kmem_zone_destroy(xfs_inode_zone);
1777 out_destroy_efi_zone:
1778 kmem_zone_destroy(xfs_efi_zone);
1779 out_destroy_efd_zone:
1780 kmem_zone_destroy(xfs_efd_zone);
1781 out_destroy_buf_item_zone:
1782 kmem_zone_destroy(xfs_buf_item_zone);
1783 out_destroy_trans_zone:
1784 kmem_zone_destroy(xfs_trans_zone);
1785 out_destroy_ifork_zone:
1786 kmem_zone_destroy(xfs_ifork_zone);
1787 out_destroy_dabuf_zone:
1788 kmem_zone_destroy(xfs_dabuf_zone);
1789 out_destroy_da_state_zone:
1790 kmem_zone_destroy(xfs_da_state_zone);
1791 out_destroy_btree_cur_zone:
1792 kmem_zone_destroy(xfs_btree_cur_zone);
1793 out_destroy_bmap_free_item_zone:
1794 kmem_zone_destroy(xfs_bmap_free_item_zone);
1795 out_destroy_log_ticket_zone:
1796 kmem_zone_destroy(xfs_log_ticket_zone);
1797 out_destroy_ioend_pool:
1798 mempool_destroy(xfs_ioend_pool);
1799 out_destroy_ioend_zone:
1800 kmem_zone_destroy(xfs_ioend_zone);
1801 out:
1802 return -ENOMEM;
1803 }
1804
1805 STATIC void
1806 xfs_destroy_zones(void)
1807 {
1808 kmem_zone_destroy(xfs_ili_zone);
1809 kmem_zone_destroy(xfs_inode_zone);
1810 kmem_zone_destroy(xfs_efi_zone);
1811 kmem_zone_destroy(xfs_efd_zone);
1812 kmem_zone_destroy(xfs_buf_item_zone);
1813 kmem_zone_destroy(xfs_trans_zone);
1814 kmem_zone_destroy(xfs_ifork_zone);
1815 kmem_zone_destroy(xfs_dabuf_zone);
1816 kmem_zone_destroy(xfs_da_state_zone);
1817 kmem_zone_destroy(xfs_btree_cur_zone);
1818 kmem_zone_destroy(xfs_bmap_free_item_zone);
1819 kmem_zone_destroy(xfs_log_ticket_zone);
1820 mempool_destroy(xfs_ioend_pool);
1821 kmem_zone_destroy(xfs_ioend_zone);
1822
1823 }
1824
1825 STATIC int __init
1826 init_xfs_fs(void)
1827 {
1828 int error;
1829
1830 printk(KERN_INFO XFS_VERSION_STRING " with "
1831 XFS_BUILD_OPTIONS " enabled\n");
1832
1833 ktrace_init(64);
1834 xfs_ioend_init();
1835 xfs_dir_startup();
1836
1837 error = xfs_init_zones();
1838 if (error)
1839 goto out;
1840
1841 error = xfs_alloc_trace_bufs();
1842 if (error)
1843 goto out_destroy_zones;
1844
1845 error = xfs_mru_cache_init();
1846 if (error)
1847 goto out_free_trace_buffers;
1848
1849 error = xfs_filestream_init();
1850 if (error)
1851 goto out_mru_cache_uninit;
1852
1853 error = xfs_buf_init();
1854 if (error)
1855 goto out_filestream_uninit;
1856
1857 error = xfs_init_procfs();
1858 if (error)
1859 goto out_buf_terminate;
1860
1861 error = xfs_sysctl_register();
1862 if (error)
1863 goto out_cleanup_procfs;
1864
1865 vfs_initquota();
1866
1867 error = register_filesystem(&xfs_fs_type);
1868 if (error)
1869 goto out_sysctl_unregister;
1870 return 0;
1871
1872 out_sysctl_unregister:
1873 xfs_sysctl_unregister();
1874 out_cleanup_procfs:
1875 xfs_cleanup_procfs();
1876 out_buf_terminate:
1877 xfs_buf_terminate();
1878 out_filestream_uninit:
1879 xfs_filestream_uninit();
1880 out_mru_cache_uninit:
1881 xfs_mru_cache_uninit();
1882 out_free_trace_buffers:
1883 xfs_free_trace_bufs();
1884 out_destroy_zones:
1885 xfs_destroy_zones();
1886 out:
1887 return error;
1888 }
1889
1890 STATIC void __exit
1891 exit_xfs_fs(void)
1892 {
1893 vfs_exitquota();
1894 unregister_filesystem(&xfs_fs_type);
1895 xfs_sysctl_unregister();
1896 xfs_cleanup_procfs();
1897 xfs_buf_terminate();
1898 xfs_filestream_uninit();
1899 xfs_mru_cache_uninit();
1900 xfs_free_trace_bufs();
1901 xfs_destroy_zones();
1902 ktrace_uninit();
1903 }
1904
1905 module_init(init_xfs_fs);
1906 module_exit(exit_xfs_fs);
1907
1908 MODULE_AUTHOR("Silicon Graphics, Inc.");
1909 MODULE_DESCRIPTION(XFS_VERSION_STRING " with " XFS_BUILD_OPTIONS " enabled");
1910 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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