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Merge branch 'for-linus' of git://gitserver.sunplusct.com/linux-2.6-score
[GitHub/mt8127/android_kernel_alcatel_ttab.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 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 xfs_inode_t *ip = XFS_I(inode);
936
937 XFS_STATS_INC(vn_reclaim);
938 if (xfs_reclaim(ip))
939 panic("%s: cannot reclaim 0x%p\n", __func__, inode);
940 }
941
942 /*
943 * Slab object creation initialisation for the XFS inode.
944 * This covers only the idempotent fields in the XFS inode;
945 * all other fields need to be initialised on allocation
946 * from the slab. This avoids the need to repeatedly intialise
947 * fields in the xfs inode that left in the initialise state
948 * when freeing the inode.
949 */
950 STATIC void
951 xfs_fs_inode_init_once(
952 void *inode)
953 {
954 struct xfs_inode *ip = inode;
955
956 memset(ip, 0, sizeof(struct xfs_inode));
957
958 /* vfs inode */
959 inode_init_once(VFS_I(ip));
960
961 /* xfs inode */
962 atomic_set(&ip->i_iocount, 0);
963 atomic_set(&ip->i_pincount, 0);
964 spin_lock_init(&ip->i_flags_lock);
965 init_waitqueue_head(&ip->i_ipin_wait);
966 /*
967 * Because we want to use a counting completion, complete
968 * the flush completion once to allow a single access to
969 * the flush completion without blocking.
970 */
971 init_completion(&ip->i_flush);
972 complete(&ip->i_flush);
973
974 mrlock_init(&ip->i_lock, MRLOCK_ALLOW_EQUAL_PRI|MRLOCK_BARRIER,
975 "xfsino", ip->i_ino);
976 mrlock_init(&ip->i_iolock, MRLOCK_BARRIER, "xfsio", ip->i_ino);
977 }
978
979 /*
980 * Attempt to flush the inode, this will actually fail
981 * if the inode is pinned, but we dirty the inode again
982 * at the point when it is unpinned after a log write,
983 * since this is when the inode itself becomes flushable.
984 */
985 STATIC int
986 xfs_fs_write_inode(
987 struct inode *inode,
988 int sync)
989 {
990 struct xfs_inode *ip = XFS_I(inode);
991 struct xfs_mount *mp = ip->i_mount;
992 int error = 0;
993
994 xfs_itrace_entry(ip);
995
996 if (XFS_FORCED_SHUTDOWN(mp))
997 return XFS_ERROR(EIO);
998
999 if (sync) {
1000 error = xfs_wait_on_pages(ip, 0, -1);
1001 if (error)
1002 goto out;
1003 }
1004
1005 /*
1006 * Bypass inodes which have already been cleaned by
1007 * the inode flush clustering code inside xfs_iflush
1008 */
1009 if (xfs_inode_clean(ip))
1010 goto out;
1011
1012 /*
1013 * We make this non-blocking if the inode is contended, return
1014 * EAGAIN to indicate to the caller that they did not succeed.
1015 * This prevents the flush path from blocking on inodes inside
1016 * another operation right now, they get caught later by xfs_sync.
1017 */
1018 if (sync) {
1019 xfs_ilock(ip, XFS_ILOCK_SHARED);
1020 xfs_iflock(ip);
1021
1022 error = xfs_iflush(ip, XFS_IFLUSH_SYNC);
1023 } else {
1024 error = EAGAIN;
1025 if (!xfs_ilock_nowait(ip, XFS_ILOCK_SHARED))
1026 goto out;
1027 if (xfs_ipincount(ip) || !xfs_iflock_nowait(ip))
1028 goto out_unlock;
1029
1030 error = xfs_iflush(ip, XFS_IFLUSH_ASYNC_NOBLOCK);
1031 }
1032
1033 out_unlock:
1034 xfs_iunlock(ip, XFS_ILOCK_SHARED);
1035 out:
1036 /*
1037 * if we failed to write out the inode then mark
1038 * it dirty again so we'll try again later.
1039 */
1040 if (error)
1041 xfs_mark_inode_dirty_sync(ip);
1042 return -error;
1043 }
1044
1045 STATIC void
1046 xfs_fs_clear_inode(
1047 struct inode *inode)
1048 {
1049 xfs_inode_t *ip = XFS_I(inode);
1050
1051 xfs_itrace_entry(ip);
1052 XFS_STATS_INC(vn_rele);
1053 XFS_STATS_INC(vn_remove);
1054 XFS_STATS_DEC(vn_active);
1055
1056 xfs_inactive(ip);
1057 }
1058
1059 STATIC void
1060 xfs_free_fsname(
1061 struct xfs_mount *mp)
1062 {
1063 kfree(mp->m_fsname);
1064 kfree(mp->m_rtname);
1065 kfree(mp->m_logname);
1066 }
1067
1068 STATIC void
1069 xfs_fs_put_super(
1070 struct super_block *sb)
1071 {
1072 struct xfs_mount *mp = XFS_M(sb);
1073 struct xfs_inode *rip = mp->m_rootip;
1074 int unmount_event_flags = 0;
1075
1076 xfs_syncd_stop(mp);
1077
1078 if (!(sb->s_flags & MS_RDONLY)) {
1079 /*
1080 * XXX(hch): this should be SYNC_WAIT.
1081 *
1082 * Or more likely not needed at all because the VFS is already
1083 * calling ->sync_fs after shutting down all filestem
1084 * operations and just before calling ->put_super.
1085 */
1086 xfs_sync_data(mp, 0);
1087 xfs_sync_attr(mp, 0);
1088 }
1089
1090 #ifdef HAVE_DMAPI
1091 if (mp->m_flags & XFS_MOUNT_DMAPI) {
1092 unmount_event_flags =
1093 (mp->m_dmevmask & (1 << DM_EVENT_UNMOUNT)) ?
1094 0 : DM_FLAGS_UNWANTED;
1095 /*
1096 * Ignore error from dmapi here, first unmount is not allowed
1097 * to fail anyway, and second we wouldn't want to fail a
1098 * unmount because of dmapi.
1099 */
1100 XFS_SEND_PREUNMOUNT(mp, rip, DM_RIGHT_NULL, rip, DM_RIGHT_NULL,
1101 NULL, NULL, 0, 0, unmount_event_flags);
1102 }
1103 #endif
1104
1105 /*
1106 * Blow away any referenced inode in the filestreams cache.
1107 * This can and will cause log traffic as inodes go inactive
1108 * here.
1109 */
1110 xfs_filestream_unmount(mp);
1111
1112 XFS_bflush(mp->m_ddev_targp);
1113
1114 if (mp->m_flags & XFS_MOUNT_DMAPI) {
1115 XFS_SEND_UNMOUNT(mp, rip, DM_RIGHT_NULL, 0, 0,
1116 unmount_event_flags);
1117 }
1118
1119 xfs_unmountfs(mp);
1120 xfs_freesb(mp);
1121 xfs_icsb_destroy_counters(mp);
1122 xfs_close_devices(mp);
1123 xfs_dmops_put(mp);
1124 xfs_free_fsname(mp);
1125 kfree(mp);
1126 }
1127
1128 STATIC int
1129 xfs_fs_sync_super(
1130 struct super_block *sb,
1131 int wait)
1132 {
1133 struct xfs_mount *mp = XFS_M(sb);
1134 int error;
1135
1136 /*
1137 * Treat a sync operation like a freeze. This is to work
1138 * around a race in sync_inodes() which works in two phases
1139 * - an asynchronous flush, which can write out an inode
1140 * without waiting for file size updates to complete, and a
1141 * synchronous flush, which wont do anything because the
1142 * async flush removed the inode's dirty flag. Also
1143 * sync_inodes() will not see any files that just have
1144 * outstanding transactions to be flushed because we don't
1145 * dirty the Linux inode until after the transaction I/O
1146 * completes.
1147 */
1148 if (wait || unlikely(sb->s_frozen == SB_FREEZE_WRITE))
1149 error = xfs_quiesce_data(mp);
1150 else
1151 error = xfs_sync_fsdata(mp, 0);
1152
1153 if (unlikely(laptop_mode)) {
1154 int prev_sync_seq = mp->m_sync_seq;
1155
1156 /*
1157 * The disk must be active because we're syncing.
1158 * We schedule xfssyncd now (now that the disk is
1159 * active) instead of later (when it might not be).
1160 */
1161 wake_up_process(mp->m_sync_task);
1162 /*
1163 * We have to wait for the sync iteration to complete.
1164 * If we don't, the disk activity caused by the sync
1165 * will come after the sync is completed, and that
1166 * triggers another sync from laptop mode.
1167 */
1168 wait_event(mp->m_wait_single_sync_task,
1169 mp->m_sync_seq != prev_sync_seq);
1170 }
1171
1172 return -error;
1173 }
1174
1175 STATIC int
1176 xfs_fs_statfs(
1177 struct dentry *dentry,
1178 struct kstatfs *statp)
1179 {
1180 struct xfs_mount *mp = XFS_M(dentry->d_sb);
1181 xfs_sb_t *sbp = &mp->m_sb;
1182 struct xfs_inode *ip = XFS_I(dentry->d_inode);
1183 __uint64_t fakeinos, id;
1184 xfs_extlen_t lsize;
1185
1186 statp->f_type = XFS_SB_MAGIC;
1187 statp->f_namelen = MAXNAMELEN - 1;
1188
1189 id = huge_encode_dev(mp->m_ddev_targp->bt_dev);
1190 statp->f_fsid.val[0] = (u32)id;
1191 statp->f_fsid.val[1] = (u32)(id >> 32);
1192
1193 xfs_icsb_sync_counters(mp, XFS_ICSB_LAZY_COUNT);
1194
1195 spin_lock(&mp->m_sb_lock);
1196 statp->f_bsize = sbp->sb_blocksize;
1197 lsize = sbp->sb_logstart ? sbp->sb_logblocks : 0;
1198 statp->f_blocks = sbp->sb_dblocks - lsize;
1199 statp->f_bfree = statp->f_bavail =
1200 sbp->sb_fdblocks - XFS_ALLOC_SET_ASIDE(mp);
1201 fakeinos = statp->f_bfree << sbp->sb_inopblog;
1202 statp->f_files =
1203 MIN(sbp->sb_icount + fakeinos, (__uint64_t)XFS_MAXINUMBER);
1204 if (mp->m_maxicount)
1205 statp->f_files = min_t(typeof(statp->f_files),
1206 statp->f_files,
1207 mp->m_maxicount);
1208 statp->f_ffree = statp->f_files - (sbp->sb_icount - sbp->sb_ifree);
1209 spin_unlock(&mp->m_sb_lock);
1210
1211 if ((ip->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) ||
1212 ((mp->m_qflags & (XFS_PQUOTA_ACCT|XFS_OQUOTA_ENFD))) ==
1213 (XFS_PQUOTA_ACCT|XFS_OQUOTA_ENFD))
1214 xfs_qm_statvfs(ip, statp);
1215 return 0;
1216 }
1217
1218 STATIC int
1219 xfs_fs_remount(
1220 struct super_block *sb,
1221 int *flags,
1222 char *options)
1223 {
1224 struct xfs_mount *mp = XFS_M(sb);
1225 substring_t args[MAX_OPT_ARGS];
1226 char *p;
1227 int error;
1228
1229 while ((p = strsep(&options, ",")) != NULL) {
1230 int token;
1231
1232 if (!*p)
1233 continue;
1234
1235 token = match_token(p, tokens, args);
1236 switch (token) {
1237 case Opt_barrier:
1238 mp->m_flags |= XFS_MOUNT_BARRIER;
1239
1240 /*
1241 * Test if barriers are actually working if we can,
1242 * else delay this check until the filesystem is
1243 * marked writeable.
1244 */
1245 if (!(mp->m_flags & XFS_MOUNT_RDONLY))
1246 xfs_mountfs_check_barriers(mp);
1247 break;
1248 case Opt_nobarrier:
1249 mp->m_flags &= ~XFS_MOUNT_BARRIER;
1250 break;
1251 default:
1252 /*
1253 * Logically we would return an error here to prevent
1254 * users from believing they might have changed
1255 * mount options using remount which can't be changed.
1256 *
1257 * But unfortunately mount(8) adds all options from
1258 * mtab and fstab to the mount arguments in some cases
1259 * so we can't blindly reject options, but have to
1260 * check for each specified option if it actually
1261 * differs from the currently set option and only
1262 * reject it if that's the case.
1263 *
1264 * Until that is implemented we return success for
1265 * every remount request, and silently ignore all
1266 * options that we can't actually change.
1267 */
1268 #if 0
1269 printk(KERN_INFO
1270 "XFS: mount option \"%s\" not supported for remount\n", p);
1271 return -EINVAL;
1272 #else
1273 break;
1274 #endif
1275 }
1276 }
1277
1278 /* ro -> rw */
1279 if ((mp->m_flags & XFS_MOUNT_RDONLY) && !(*flags & MS_RDONLY)) {
1280 mp->m_flags &= ~XFS_MOUNT_RDONLY;
1281 if (mp->m_flags & XFS_MOUNT_BARRIER)
1282 xfs_mountfs_check_barriers(mp);
1283
1284 /*
1285 * If this is the first remount to writeable state we
1286 * might have some superblock changes to update.
1287 */
1288 if (mp->m_update_flags) {
1289 error = xfs_mount_log_sb(mp, mp->m_update_flags);
1290 if (error) {
1291 cmn_err(CE_WARN,
1292 "XFS: failed to write sb changes");
1293 return error;
1294 }
1295 mp->m_update_flags = 0;
1296 }
1297 }
1298
1299 /* rw -> ro */
1300 if (!(mp->m_flags & XFS_MOUNT_RDONLY) && (*flags & MS_RDONLY)) {
1301 xfs_quiesce_data(mp);
1302 xfs_quiesce_attr(mp);
1303 mp->m_flags |= XFS_MOUNT_RDONLY;
1304 }
1305
1306 return 0;
1307 }
1308
1309 /*
1310 * Second stage of a freeze. The data is already frozen so we only
1311 * need to take care of the metadata. Once that's done write a dummy
1312 * record to dirty the log in case of a crash while frozen.
1313 */
1314 STATIC int
1315 xfs_fs_freeze(
1316 struct super_block *sb)
1317 {
1318 struct xfs_mount *mp = XFS_M(sb);
1319
1320 xfs_quiesce_attr(mp);
1321 return -xfs_fs_log_dummy(mp);
1322 }
1323
1324 STATIC int
1325 xfs_fs_show_options(
1326 struct seq_file *m,
1327 struct vfsmount *mnt)
1328 {
1329 return -xfs_showargs(XFS_M(mnt->mnt_sb), m);
1330 }
1331
1332 /*
1333 * This function fills in xfs_mount_t fields based on mount args.
1334 * Note: the superblock _has_ now been read in.
1335 */
1336 STATIC int
1337 xfs_finish_flags(
1338 struct xfs_mount *mp)
1339 {
1340 int ronly = (mp->m_flags & XFS_MOUNT_RDONLY);
1341
1342 /* Fail a mount where the logbuf is smaller than the log stripe */
1343 if (xfs_sb_version_haslogv2(&mp->m_sb)) {
1344 if (mp->m_logbsize <= 0 &&
1345 mp->m_sb.sb_logsunit > XLOG_BIG_RECORD_BSIZE) {
1346 mp->m_logbsize = mp->m_sb.sb_logsunit;
1347 } else if (mp->m_logbsize > 0 &&
1348 mp->m_logbsize < mp->m_sb.sb_logsunit) {
1349 cmn_err(CE_WARN,
1350 "XFS: logbuf size must be greater than or equal to log stripe size");
1351 return XFS_ERROR(EINVAL);
1352 }
1353 } else {
1354 /* Fail a mount if the logbuf is larger than 32K */
1355 if (mp->m_logbsize > XLOG_BIG_RECORD_BSIZE) {
1356 cmn_err(CE_WARN,
1357 "XFS: logbuf size for version 1 logs must be 16K or 32K");
1358 return XFS_ERROR(EINVAL);
1359 }
1360 }
1361
1362 /*
1363 * mkfs'ed attr2 will turn on attr2 mount unless explicitly
1364 * told by noattr2 to turn it off
1365 */
1366 if (xfs_sb_version_hasattr2(&mp->m_sb) &&
1367 !(mp->m_flags & XFS_MOUNT_NOATTR2))
1368 mp->m_flags |= XFS_MOUNT_ATTR2;
1369
1370 /*
1371 * prohibit r/w mounts of read-only filesystems
1372 */
1373 if ((mp->m_sb.sb_flags & XFS_SBF_READONLY) && !ronly) {
1374 cmn_err(CE_WARN,
1375 "XFS: cannot mount a read-only filesystem as read-write");
1376 return XFS_ERROR(EROFS);
1377 }
1378
1379 return 0;
1380 }
1381
1382 STATIC int
1383 xfs_fs_fill_super(
1384 struct super_block *sb,
1385 void *data,
1386 int silent)
1387 {
1388 struct inode *root;
1389 struct xfs_mount *mp = NULL;
1390 int flags = 0, error = ENOMEM;
1391 char *mtpt = NULL;
1392
1393 mp = kzalloc(sizeof(struct xfs_mount), GFP_KERNEL);
1394 if (!mp)
1395 goto out;
1396
1397 spin_lock_init(&mp->m_sb_lock);
1398 mutex_init(&mp->m_growlock);
1399 atomic_set(&mp->m_active_trans, 0);
1400 INIT_LIST_HEAD(&mp->m_sync_list);
1401 spin_lock_init(&mp->m_sync_lock);
1402 init_waitqueue_head(&mp->m_wait_single_sync_task);
1403
1404 mp->m_super = sb;
1405 sb->s_fs_info = mp;
1406
1407 error = xfs_parseargs(mp, (char *)data, &mtpt);
1408 if (error)
1409 goto out_free_fsname;
1410
1411 sb_min_blocksize(sb, BBSIZE);
1412 sb->s_xattr = xfs_xattr_handlers;
1413 sb->s_export_op = &xfs_export_operations;
1414 #ifdef CONFIG_XFS_QUOTA
1415 sb->s_qcop = &xfs_quotactl_operations;
1416 #endif
1417 sb->s_op = &xfs_super_operations;
1418
1419 error = xfs_dmops_get(mp);
1420 if (error)
1421 goto out_free_fsname;
1422
1423 if (silent)
1424 flags |= XFS_MFSI_QUIET;
1425
1426 error = xfs_open_devices(mp);
1427 if (error)
1428 goto out_put_dmops;
1429
1430 if (xfs_icsb_init_counters(mp))
1431 mp->m_flags |= XFS_MOUNT_NO_PERCPU_SB;
1432
1433 error = xfs_readsb(mp, flags);
1434 if (error)
1435 goto out_destroy_counters;
1436
1437 error = xfs_finish_flags(mp);
1438 if (error)
1439 goto out_free_sb;
1440
1441 error = xfs_setup_devices(mp);
1442 if (error)
1443 goto out_free_sb;
1444
1445 if (mp->m_flags & XFS_MOUNT_BARRIER)
1446 xfs_mountfs_check_barriers(mp);
1447
1448 error = xfs_filestream_mount(mp);
1449 if (error)
1450 goto out_free_sb;
1451
1452 error = xfs_mountfs(mp);
1453 if (error)
1454 goto out_filestream_unmount;
1455
1456 XFS_SEND_MOUNT(mp, DM_RIGHT_NULL, mtpt, mp->m_fsname);
1457
1458 sb->s_magic = XFS_SB_MAGIC;
1459 sb->s_blocksize = mp->m_sb.sb_blocksize;
1460 sb->s_blocksize_bits = ffs(sb->s_blocksize) - 1;
1461 sb->s_maxbytes = xfs_max_file_offset(sb->s_blocksize_bits);
1462 sb->s_time_gran = 1;
1463 set_posix_acl_flag(sb);
1464
1465 root = igrab(VFS_I(mp->m_rootip));
1466 if (!root) {
1467 error = ENOENT;
1468 goto fail_unmount;
1469 }
1470 if (is_bad_inode(root)) {
1471 error = EINVAL;
1472 goto fail_vnrele;
1473 }
1474 sb->s_root = d_alloc_root(root);
1475 if (!sb->s_root) {
1476 error = ENOMEM;
1477 goto fail_vnrele;
1478 }
1479
1480 error = xfs_syncd_init(mp);
1481 if (error)
1482 goto fail_vnrele;
1483
1484 kfree(mtpt);
1485
1486 xfs_itrace_exit(XFS_I(sb->s_root->d_inode));
1487 return 0;
1488
1489 out_filestream_unmount:
1490 xfs_filestream_unmount(mp);
1491 out_free_sb:
1492 xfs_freesb(mp);
1493 out_destroy_counters:
1494 xfs_icsb_destroy_counters(mp);
1495 xfs_close_devices(mp);
1496 out_put_dmops:
1497 xfs_dmops_put(mp);
1498 out_free_fsname:
1499 xfs_free_fsname(mp);
1500 kfree(mtpt);
1501 kfree(mp);
1502 out:
1503 return -error;
1504
1505 fail_vnrele:
1506 if (sb->s_root) {
1507 dput(sb->s_root);
1508 sb->s_root = NULL;
1509 } else {
1510 iput(root);
1511 }
1512
1513 fail_unmount:
1514 /*
1515 * Blow away any referenced inode in the filestreams cache.
1516 * This can and will cause log traffic as inodes go inactive
1517 * here.
1518 */
1519 xfs_filestream_unmount(mp);
1520
1521 XFS_bflush(mp->m_ddev_targp);
1522
1523 xfs_unmountfs(mp);
1524 goto out_free_sb;
1525 }
1526
1527 STATIC int
1528 xfs_fs_get_sb(
1529 struct file_system_type *fs_type,
1530 int flags,
1531 const char *dev_name,
1532 void *data,
1533 struct vfsmount *mnt)
1534 {
1535 return get_sb_bdev(fs_type, flags, dev_name, data, xfs_fs_fill_super,
1536 mnt);
1537 }
1538
1539 static struct super_operations xfs_super_operations = {
1540 .alloc_inode = xfs_fs_alloc_inode,
1541 .destroy_inode = xfs_fs_destroy_inode,
1542 .write_inode = xfs_fs_write_inode,
1543 .clear_inode = xfs_fs_clear_inode,
1544 .put_super = xfs_fs_put_super,
1545 .sync_fs = xfs_fs_sync_super,
1546 .freeze_fs = xfs_fs_freeze,
1547 .statfs = xfs_fs_statfs,
1548 .remount_fs = xfs_fs_remount,
1549 .show_options = xfs_fs_show_options,
1550 };
1551
1552 static struct file_system_type xfs_fs_type = {
1553 .owner = THIS_MODULE,
1554 .name = "xfs",
1555 .get_sb = xfs_fs_get_sb,
1556 .kill_sb = kill_block_super,
1557 .fs_flags = FS_REQUIRES_DEV,
1558 };
1559
1560 STATIC int __init
1561 xfs_alloc_trace_bufs(void)
1562 {
1563 #ifdef XFS_ALLOC_TRACE
1564 xfs_alloc_trace_buf = ktrace_alloc(XFS_ALLOC_TRACE_SIZE, KM_MAYFAIL);
1565 if (!xfs_alloc_trace_buf)
1566 goto out;
1567 #endif
1568 #ifdef XFS_BMAP_TRACE
1569 xfs_bmap_trace_buf = ktrace_alloc(XFS_BMAP_TRACE_SIZE, KM_MAYFAIL);
1570 if (!xfs_bmap_trace_buf)
1571 goto out_free_alloc_trace;
1572 #endif
1573 #ifdef XFS_BTREE_TRACE
1574 xfs_allocbt_trace_buf = ktrace_alloc(XFS_ALLOCBT_TRACE_SIZE,
1575 KM_MAYFAIL);
1576 if (!xfs_allocbt_trace_buf)
1577 goto out_free_bmap_trace;
1578
1579 xfs_inobt_trace_buf = ktrace_alloc(XFS_INOBT_TRACE_SIZE, KM_MAYFAIL);
1580 if (!xfs_inobt_trace_buf)
1581 goto out_free_allocbt_trace;
1582
1583 xfs_bmbt_trace_buf = ktrace_alloc(XFS_BMBT_TRACE_SIZE, KM_MAYFAIL);
1584 if (!xfs_bmbt_trace_buf)
1585 goto out_free_inobt_trace;
1586 #endif
1587 #ifdef XFS_ATTR_TRACE
1588 xfs_attr_trace_buf = ktrace_alloc(XFS_ATTR_TRACE_SIZE, KM_MAYFAIL);
1589 if (!xfs_attr_trace_buf)
1590 goto out_free_bmbt_trace;
1591 #endif
1592 #ifdef XFS_DIR2_TRACE
1593 xfs_dir2_trace_buf = ktrace_alloc(XFS_DIR2_GTRACE_SIZE, KM_MAYFAIL);
1594 if (!xfs_dir2_trace_buf)
1595 goto out_free_attr_trace;
1596 #endif
1597
1598 return 0;
1599
1600 #ifdef XFS_DIR2_TRACE
1601 out_free_attr_trace:
1602 #endif
1603 #ifdef XFS_ATTR_TRACE
1604 ktrace_free(xfs_attr_trace_buf);
1605 out_free_bmbt_trace:
1606 #endif
1607 #ifdef XFS_BTREE_TRACE
1608 ktrace_free(xfs_bmbt_trace_buf);
1609 out_free_inobt_trace:
1610 ktrace_free(xfs_inobt_trace_buf);
1611 out_free_allocbt_trace:
1612 ktrace_free(xfs_allocbt_trace_buf);
1613 out_free_bmap_trace:
1614 #endif
1615 #ifdef XFS_BMAP_TRACE
1616 ktrace_free(xfs_bmap_trace_buf);
1617 out_free_alloc_trace:
1618 #endif
1619 #ifdef XFS_ALLOC_TRACE
1620 ktrace_free(xfs_alloc_trace_buf);
1621 out:
1622 #endif
1623 return -ENOMEM;
1624 }
1625
1626 STATIC void
1627 xfs_free_trace_bufs(void)
1628 {
1629 #ifdef XFS_DIR2_TRACE
1630 ktrace_free(xfs_dir2_trace_buf);
1631 #endif
1632 #ifdef XFS_ATTR_TRACE
1633 ktrace_free(xfs_attr_trace_buf);
1634 #endif
1635 #ifdef XFS_BTREE_TRACE
1636 ktrace_free(xfs_bmbt_trace_buf);
1637 ktrace_free(xfs_inobt_trace_buf);
1638 ktrace_free(xfs_allocbt_trace_buf);
1639 #endif
1640 #ifdef XFS_BMAP_TRACE
1641 ktrace_free(xfs_bmap_trace_buf);
1642 #endif
1643 #ifdef XFS_ALLOC_TRACE
1644 ktrace_free(xfs_alloc_trace_buf);
1645 #endif
1646 }
1647
1648 STATIC int __init
1649 xfs_init_zones(void)
1650 {
1651
1652 xfs_ioend_zone = kmem_zone_init(sizeof(xfs_ioend_t), "xfs_ioend");
1653 if (!xfs_ioend_zone)
1654 goto out;
1655
1656 xfs_ioend_pool = mempool_create_slab_pool(4 * MAX_BUF_PER_PAGE,
1657 xfs_ioend_zone);
1658 if (!xfs_ioend_pool)
1659 goto out_destroy_ioend_zone;
1660
1661 xfs_log_ticket_zone = kmem_zone_init(sizeof(xlog_ticket_t),
1662 "xfs_log_ticket");
1663 if (!xfs_log_ticket_zone)
1664 goto out_destroy_ioend_pool;
1665
1666 xfs_bmap_free_item_zone = kmem_zone_init(sizeof(xfs_bmap_free_item_t),
1667 "xfs_bmap_free_item");
1668 if (!xfs_bmap_free_item_zone)
1669 goto out_destroy_log_ticket_zone;
1670
1671 xfs_btree_cur_zone = kmem_zone_init(sizeof(xfs_btree_cur_t),
1672 "xfs_btree_cur");
1673 if (!xfs_btree_cur_zone)
1674 goto out_destroy_bmap_free_item_zone;
1675
1676 xfs_da_state_zone = kmem_zone_init(sizeof(xfs_da_state_t),
1677 "xfs_da_state");
1678 if (!xfs_da_state_zone)
1679 goto out_destroy_btree_cur_zone;
1680
1681 xfs_dabuf_zone = kmem_zone_init(sizeof(xfs_dabuf_t), "xfs_dabuf");
1682 if (!xfs_dabuf_zone)
1683 goto out_destroy_da_state_zone;
1684
1685 xfs_ifork_zone = kmem_zone_init(sizeof(xfs_ifork_t), "xfs_ifork");
1686 if (!xfs_ifork_zone)
1687 goto out_destroy_dabuf_zone;
1688
1689 xfs_trans_zone = kmem_zone_init(sizeof(xfs_trans_t), "xfs_trans");
1690 if (!xfs_trans_zone)
1691 goto out_destroy_ifork_zone;
1692
1693 /*
1694 * The size of the zone allocated buf log item is the maximum
1695 * size possible under XFS. This wastes a little bit of memory,
1696 * but it is much faster.
1697 */
1698 xfs_buf_item_zone = kmem_zone_init((sizeof(xfs_buf_log_item_t) +
1699 (((XFS_MAX_BLOCKSIZE / XFS_BLI_CHUNK) /
1700 NBWORD) * sizeof(int))), "xfs_buf_item");
1701 if (!xfs_buf_item_zone)
1702 goto out_destroy_trans_zone;
1703
1704 xfs_efd_zone = kmem_zone_init((sizeof(xfs_efd_log_item_t) +
1705 ((XFS_EFD_MAX_FAST_EXTENTS - 1) *
1706 sizeof(xfs_extent_t))), "xfs_efd_item");
1707 if (!xfs_efd_zone)
1708 goto out_destroy_buf_item_zone;
1709
1710 xfs_efi_zone = kmem_zone_init((sizeof(xfs_efi_log_item_t) +
1711 ((XFS_EFI_MAX_FAST_EXTENTS - 1) *
1712 sizeof(xfs_extent_t))), "xfs_efi_item");
1713 if (!xfs_efi_zone)
1714 goto out_destroy_efd_zone;
1715
1716 xfs_inode_zone =
1717 kmem_zone_init_flags(sizeof(xfs_inode_t), "xfs_inode",
1718 KM_ZONE_HWALIGN | KM_ZONE_RECLAIM | KM_ZONE_SPREAD,
1719 xfs_fs_inode_init_once);
1720 if (!xfs_inode_zone)
1721 goto out_destroy_efi_zone;
1722
1723 xfs_ili_zone =
1724 kmem_zone_init_flags(sizeof(xfs_inode_log_item_t), "xfs_ili",
1725 KM_ZONE_SPREAD, NULL);
1726 if (!xfs_ili_zone)
1727 goto out_destroy_inode_zone;
1728
1729 return 0;
1730
1731 out_destroy_inode_zone:
1732 kmem_zone_destroy(xfs_inode_zone);
1733 out_destroy_efi_zone:
1734 kmem_zone_destroy(xfs_efi_zone);
1735 out_destroy_efd_zone:
1736 kmem_zone_destroy(xfs_efd_zone);
1737 out_destroy_buf_item_zone:
1738 kmem_zone_destroy(xfs_buf_item_zone);
1739 out_destroy_trans_zone:
1740 kmem_zone_destroy(xfs_trans_zone);
1741 out_destroy_ifork_zone:
1742 kmem_zone_destroy(xfs_ifork_zone);
1743 out_destroy_dabuf_zone:
1744 kmem_zone_destroy(xfs_dabuf_zone);
1745 out_destroy_da_state_zone:
1746 kmem_zone_destroy(xfs_da_state_zone);
1747 out_destroy_btree_cur_zone:
1748 kmem_zone_destroy(xfs_btree_cur_zone);
1749 out_destroy_bmap_free_item_zone:
1750 kmem_zone_destroy(xfs_bmap_free_item_zone);
1751 out_destroy_log_ticket_zone:
1752 kmem_zone_destroy(xfs_log_ticket_zone);
1753 out_destroy_ioend_pool:
1754 mempool_destroy(xfs_ioend_pool);
1755 out_destroy_ioend_zone:
1756 kmem_zone_destroy(xfs_ioend_zone);
1757 out:
1758 return -ENOMEM;
1759 }
1760
1761 STATIC void
1762 xfs_destroy_zones(void)
1763 {
1764 kmem_zone_destroy(xfs_ili_zone);
1765 kmem_zone_destroy(xfs_inode_zone);
1766 kmem_zone_destroy(xfs_efi_zone);
1767 kmem_zone_destroy(xfs_efd_zone);
1768 kmem_zone_destroy(xfs_buf_item_zone);
1769 kmem_zone_destroy(xfs_trans_zone);
1770 kmem_zone_destroy(xfs_ifork_zone);
1771 kmem_zone_destroy(xfs_dabuf_zone);
1772 kmem_zone_destroy(xfs_da_state_zone);
1773 kmem_zone_destroy(xfs_btree_cur_zone);
1774 kmem_zone_destroy(xfs_bmap_free_item_zone);
1775 kmem_zone_destroy(xfs_log_ticket_zone);
1776 mempool_destroy(xfs_ioend_pool);
1777 kmem_zone_destroy(xfs_ioend_zone);
1778
1779 }
1780
1781 STATIC int __init
1782 init_xfs_fs(void)
1783 {
1784 int error;
1785
1786 printk(KERN_INFO XFS_VERSION_STRING " with "
1787 XFS_BUILD_OPTIONS " enabled\n");
1788
1789 ktrace_init(64);
1790 xfs_ioend_init();
1791 xfs_dir_startup();
1792
1793 error = xfs_init_zones();
1794 if (error)
1795 goto out;
1796
1797 error = xfs_alloc_trace_bufs();
1798 if (error)
1799 goto out_destroy_zones;
1800
1801 error = xfs_mru_cache_init();
1802 if (error)
1803 goto out_free_trace_buffers;
1804
1805 error = xfs_filestream_init();
1806 if (error)
1807 goto out_mru_cache_uninit;
1808
1809 error = xfs_buf_init();
1810 if (error)
1811 goto out_filestream_uninit;
1812
1813 error = xfs_init_procfs();
1814 if (error)
1815 goto out_buf_terminate;
1816
1817 error = xfs_sysctl_register();
1818 if (error)
1819 goto out_cleanup_procfs;
1820
1821 vfs_initquota();
1822
1823 error = register_filesystem(&xfs_fs_type);
1824 if (error)
1825 goto out_sysctl_unregister;
1826 return 0;
1827
1828 out_sysctl_unregister:
1829 xfs_sysctl_unregister();
1830 out_cleanup_procfs:
1831 xfs_cleanup_procfs();
1832 out_buf_terminate:
1833 xfs_buf_terminate();
1834 out_filestream_uninit:
1835 xfs_filestream_uninit();
1836 out_mru_cache_uninit:
1837 xfs_mru_cache_uninit();
1838 out_free_trace_buffers:
1839 xfs_free_trace_bufs();
1840 out_destroy_zones:
1841 xfs_destroy_zones();
1842 out:
1843 return error;
1844 }
1845
1846 STATIC void __exit
1847 exit_xfs_fs(void)
1848 {
1849 vfs_exitquota();
1850 unregister_filesystem(&xfs_fs_type);
1851 xfs_sysctl_unregister();
1852 xfs_cleanup_procfs();
1853 xfs_buf_terminate();
1854 xfs_filestream_uninit();
1855 xfs_mru_cache_uninit();
1856 xfs_free_trace_bufs();
1857 xfs_destroy_zones();
1858 ktrace_uninit();
1859 }
1860
1861 module_init(init_xfs_fs);
1862 module_exit(exit_xfs_fs);
1863
1864 MODULE_AUTHOR("Silicon Graphics, Inc.");
1865 MODULE_DESCRIPTION(XFS_VERSION_STRING " with " XFS_BUILD_OPTIONS " enabled");
1866 MODULE_LICENSE("GPL");
kernel source for telekom puls (alcatel/mediatek)