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Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
[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_acl.h"
47 #include "xfs_attr.h"
48 #include "xfs_buf_item.h"
49 #include "xfs_utils.h"
50 #include "xfs_vnodeops.h"
51 #include "xfs_version.h"
52 #include "xfs_log_priv.h"
53 #include "xfs_trans_priv.h"
54 #include "xfs_filestream.h"
55 #include "xfs_da_btree.h"
56 #include "xfs_dir2_trace.h"
57 #include "xfs_extfree_item.h"
58 #include "xfs_mru_cache.h"
59 #include "xfs_inode_item.h"
60 #include "xfs_sync.h"
61
62 #include <linux/namei.h>
63 #include <linux/init.h>
64 #include <linux/mount.h>
65 #include <linux/mempool.h>
66 #include <linux/writeback.h>
67 #include <linux/kthread.h>
68 #include <linux/freezer.h>
69 #include <linux/parser.h>
70
71 static struct super_operations xfs_super_operations;
72 static kmem_zone_t *xfs_ioend_zone;
73 mempool_t *xfs_ioend_pool;
74
75 #define MNTOPT_LOGBUFS "logbufs" /* number of XFS log buffers */
76 #define MNTOPT_LOGBSIZE "logbsize" /* size of XFS log buffers */
77 #define MNTOPT_LOGDEV "logdev" /* log device */
78 #define MNTOPT_RTDEV "rtdev" /* realtime I/O device */
79 #define MNTOPT_BIOSIZE "biosize" /* log2 of preferred buffered io size */
80 #define MNTOPT_WSYNC "wsync" /* safe-mode nfs compatible mount */
81 #define MNTOPT_INO64 "ino64" /* force inodes into 64-bit range */
82 #define MNTOPT_NOALIGN "noalign" /* turn off stripe alignment */
83 #define MNTOPT_SWALLOC "swalloc" /* turn on stripe width allocation */
84 #define MNTOPT_SUNIT "sunit" /* data volume stripe unit */
85 #define MNTOPT_SWIDTH "swidth" /* data volume stripe width */
86 #define MNTOPT_NOUUID "nouuid" /* ignore filesystem UUID */
87 #define MNTOPT_MTPT "mtpt" /* filesystem mount point */
88 #define MNTOPT_GRPID "grpid" /* group-ID from parent directory */
89 #define MNTOPT_NOGRPID "nogrpid" /* group-ID from current process */
90 #define MNTOPT_BSDGROUPS "bsdgroups" /* group-ID from parent directory */
91 #define MNTOPT_SYSVGROUPS "sysvgroups" /* group-ID from current process */
92 #define MNTOPT_ALLOCSIZE "allocsize" /* preferred allocation size */
93 #define MNTOPT_NORECOVERY "norecovery" /* don't run XFS recovery */
94 #define MNTOPT_BARRIER "barrier" /* use writer barriers for log write and
95 * unwritten extent conversion */
96 #define MNTOPT_NOBARRIER "nobarrier" /* .. disable */
97 #define MNTOPT_OSYNCISOSYNC "osyncisosync" /* o_sync is REALLY o_sync */
98 #define MNTOPT_64BITINODE "inode64" /* inodes can be allocated anywhere */
99 #define MNTOPT_IKEEP "ikeep" /* do not free empty inode clusters */
100 #define MNTOPT_NOIKEEP "noikeep" /* free empty inode clusters */
101 #define MNTOPT_LARGEIO "largeio" /* report large I/O sizes in stat() */
102 #define MNTOPT_NOLARGEIO "nolargeio" /* do not report large I/O sizes
103 * in stat(). */
104 #define MNTOPT_ATTR2 "attr2" /* do use attr2 attribute format */
105 #define MNTOPT_NOATTR2 "noattr2" /* do not use attr2 attribute format */
106 #define MNTOPT_FILESTREAM "filestreams" /* use filestreams allocator */
107 #define MNTOPT_QUOTA "quota" /* disk quotas (user) */
108 #define MNTOPT_NOQUOTA "noquota" /* no quotas */
109 #define MNTOPT_USRQUOTA "usrquota" /* user quota enabled */
110 #define MNTOPT_GRPQUOTA "grpquota" /* group quota enabled */
111 #define MNTOPT_PRJQUOTA "prjquota" /* project quota enabled */
112 #define MNTOPT_UQUOTA "uquota" /* user quota (IRIX variant) */
113 #define MNTOPT_GQUOTA "gquota" /* group quota (IRIX variant) */
114 #define MNTOPT_PQUOTA "pquota" /* project quota (IRIX variant) */
115 #define MNTOPT_UQUOTANOENF "uqnoenforce"/* user quota limit enforcement */
116 #define MNTOPT_GQUOTANOENF "gqnoenforce"/* group quota limit enforcement */
117 #define MNTOPT_PQUOTANOENF "pqnoenforce"/* project quota limit enforcement */
118 #define MNTOPT_QUOTANOENF "qnoenforce" /* same as uqnoenforce */
119 #define MNTOPT_DMAPI "dmapi" /* DMI enabled (DMAPI / XDSM) */
120 #define MNTOPT_XDSM "xdsm" /* DMI enabled (DMAPI / XDSM) */
121 #define MNTOPT_DMI "dmi" /* DMI enabled (DMAPI / XDSM) */
122
123 /*
124 * Table driven mount option parser.
125 *
126 * Currently only used for remount, but it will be used for mount
127 * in the future, too.
128 */
129 enum {
130 Opt_barrier, Opt_nobarrier, Opt_err
131 };
132
133 static const match_table_t tokens = {
134 {Opt_barrier, "barrier"},
135 {Opt_nobarrier, "nobarrier"},
136 {Opt_err, NULL}
137 };
138
139
140 STATIC unsigned long
141 suffix_strtoul(char *s, char **endp, unsigned int base)
142 {
143 int last, shift_left_factor = 0;
144 char *value = s;
145
146 last = strlen(value) - 1;
147 if (value[last] == 'K' || value[last] == 'k') {
148 shift_left_factor = 10;
149 value[last] = '\0';
150 }
151 if (value[last] == 'M' || value[last] == 'm') {
152 shift_left_factor = 20;
153 value[last] = '\0';
154 }
155 if (value[last] == 'G' || value[last] == 'g') {
156 shift_left_factor = 30;
157 value[last] = '\0';
158 }
159
160 return simple_strtoul((const char *)s, endp, base) << shift_left_factor;
161 }
162
163 /*
164 * This function fills in xfs_mount_t fields based on mount args.
165 * Note: the superblock has _not_ yet been read in.
166 *
167 * Note that this function leaks the various device name allocations on
168 * failure. The caller takes care of them.
169 */
170 STATIC int
171 xfs_parseargs(
172 struct xfs_mount *mp,
173 char *options,
174 char **mtpt)
175 {
176 struct super_block *sb = mp->m_super;
177 char *this_char, *value, *eov;
178 int dsunit = 0;
179 int dswidth = 0;
180 int iosize = 0;
181 int dmapi_implies_ikeep = 1;
182 __uint8_t iosizelog = 0;
183
184 /*
185 * Copy binary VFS mount flags we are interested in.
186 */
187 if (sb->s_flags & MS_RDONLY)
188 mp->m_flags |= XFS_MOUNT_RDONLY;
189 if (sb->s_flags & MS_DIRSYNC)
190 mp->m_flags |= XFS_MOUNT_DIRSYNC;
191 if (sb->s_flags & MS_SYNCHRONOUS)
192 mp->m_flags |= XFS_MOUNT_WSYNC;
193
194 /*
195 * Set some default flags that could be cleared by the mount option
196 * parsing.
197 */
198 mp->m_flags |= XFS_MOUNT_BARRIER;
199 mp->m_flags |= XFS_MOUNT_COMPAT_IOSIZE;
200 mp->m_flags |= XFS_MOUNT_SMALL_INUMS;
201
202 /*
203 * These can be overridden by the mount option parsing.
204 */
205 mp->m_logbufs = -1;
206 mp->m_logbsize = -1;
207
208 if (!options)
209 goto done;
210
211 while ((this_char = strsep(&options, ",")) != NULL) {
212 if (!*this_char)
213 continue;
214 if ((value = strchr(this_char, '=')) != NULL)
215 *value++ = 0;
216
217 if (!strcmp(this_char, MNTOPT_LOGBUFS)) {
218 if (!value || !*value) {
219 cmn_err(CE_WARN,
220 "XFS: %s option requires an argument",
221 this_char);
222 return EINVAL;
223 }
224 mp->m_logbufs = simple_strtoul(value, &eov, 10);
225 } else if (!strcmp(this_char, MNTOPT_LOGBSIZE)) {
226 if (!value || !*value) {
227 cmn_err(CE_WARN,
228 "XFS: %s option requires an argument",
229 this_char);
230 return EINVAL;
231 }
232 mp->m_logbsize = suffix_strtoul(value, &eov, 10);
233 } else if (!strcmp(this_char, MNTOPT_LOGDEV)) {
234 if (!value || !*value) {
235 cmn_err(CE_WARN,
236 "XFS: %s option requires an argument",
237 this_char);
238 return EINVAL;
239 }
240 mp->m_logname = kstrndup(value, MAXNAMELEN, GFP_KERNEL);
241 if (!mp->m_logname)
242 return ENOMEM;
243 } else if (!strcmp(this_char, MNTOPT_MTPT)) {
244 if (!value || !*value) {
245 cmn_err(CE_WARN,
246 "XFS: %s option requires an argument",
247 this_char);
248 return EINVAL;
249 }
250 *mtpt = kstrndup(value, MAXNAMELEN, GFP_KERNEL);
251 if (!*mtpt)
252 return ENOMEM;
253 } else if (!strcmp(this_char, MNTOPT_RTDEV)) {
254 if (!value || !*value) {
255 cmn_err(CE_WARN,
256 "XFS: %s option requires an argument",
257 this_char);
258 return EINVAL;
259 }
260 mp->m_rtname = kstrndup(value, MAXNAMELEN, GFP_KERNEL);
261 if (!mp->m_rtname)
262 return ENOMEM;
263 } else if (!strcmp(this_char, MNTOPT_BIOSIZE)) {
264 if (!value || !*value) {
265 cmn_err(CE_WARN,
266 "XFS: %s option requires an argument",
267 this_char);
268 return EINVAL;
269 }
270 iosize = simple_strtoul(value, &eov, 10);
271 iosizelog = ffs(iosize) - 1;
272 } else if (!strcmp(this_char, MNTOPT_ALLOCSIZE)) {
273 if (!value || !*value) {
274 cmn_err(CE_WARN,
275 "XFS: %s option requires an argument",
276 this_char);
277 return EINVAL;
278 }
279 iosize = suffix_strtoul(value, &eov, 10);
280 iosizelog = ffs(iosize) - 1;
281 } else if (!strcmp(this_char, MNTOPT_GRPID) ||
282 !strcmp(this_char, MNTOPT_BSDGROUPS)) {
283 mp->m_flags |= XFS_MOUNT_GRPID;
284 } else if (!strcmp(this_char, MNTOPT_NOGRPID) ||
285 !strcmp(this_char, MNTOPT_SYSVGROUPS)) {
286 mp->m_flags &= ~XFS_MOUNT_GRPID;
287 } else if (!strcmp(this_char, MNTOPT_WSYNC)) {
288 mp->m_flags |= XFS_MOUNT_WSYNC;
289 } else if (!strcmp(this_char, MNTOPT_OSYNCISOSYNC)) {
290 mp->m_flags |= XFS_MOUNT_OSYNCISOSYNC;
291 } else if (!strcmp(this_char, MNTOPT_NORECOVERY)) {
292 mp->m_flags |= XFS_MOUNT_NORECOVERY;
293 } else if (!strcmp(this_char, MNTOPT_INO64)) {
294 #if XFS_BIG_INUMS
295 mp->m_flags |= XFS_MOUNT_INO64;
296 mp->m_inoadd = XFS_INO64_OFFSET;
297 #else
298 cmn_err(CE_WARN,
299 "XFS: %s option not allowed on this system",
300 this_char);
301 return EINVAL;
302 #endif
303 } else if (!strcmp(this_char, MNTOPT_NOALIGN)) {
304 mp->m_flags |= XFS_MOUNT_NOALIGN;
305 } else if (!strcmp(this_char, MNTOPT_SWALLOC)) {
306 mp->m_flags |= XFS_MOUNT_SWALLOC;
307 } else if (!strcmp(this_char, MNTOPT_SUNIT)) {
308 if (!value || !*value) {
309 cmn_err(CE_WARN,
310 "XFS: %s option requires an argument",
311 this_char);
312 return EINVAL;
313 }
314 dsunit = simple_strtoul(value, &eov, 10);
315 } else if (!strcmp(this_char, MNTOPT_SWIDTH)) {
316 if (!value || !*value) {
317 cmn_err(CE_WARN,
318 "XFS: %s option requires an argument",
319 this_char);
320 return EINVAL;
321 }
322 dswidth = simple_strtoul(value, &eov, 10);
323 } else if (!strcmp(this_char, MNTOPT_64BITINODE)) {
324 mp->m_flags &= ~XFS_MOUNT_SMALL_INUMS;
325 #if !XFS_BIG_INUMS
326 cmn_err(CE_WARN,
327 "XFS: %s option not allowed on this system",
328 this_char);
329 return EINVAL;
330 #endif
331 } else if (!strcmp(this_char, MNTOPT_NOUUID)) {
332 mp->m_flags |= XFS_MOUNT_NOUUID;
333 } else if (!strcmp(this_char, MNTOPT_BARRIER)) {
334 mp->m_flags |= XFS_MOUNT_BARRIER;
335 } else if (!strcmp(this_char, MNTOPT_NOBARRIER)) {
336 mp->m_flags &= ~XFS_MOUNT_BARRIER;
337 } else if (!strcmp(this_char, MNTOPT_IKEEP)) {
338 mp->m_flags |= XFS_MOUNT_IKEEP;
339 } else if (!strcmp(this_char, MNTOPT_NOIKEEP)) {
340 dmapi_implies_ikeep = 0;
341 mp->m_flags &= ~XFS_MOUNT_IKEEP;
342 } else if (!strcmp(this_char, MNTOPT_LARGEIO)) {
343 mp->m_flags &= ~XFS_MOUNT_COMPAT_IOSIZE;
344 } else if (!strcmp(this_char, MNTOPT_NOLARGEIO)) {
345 mp->m_flags |= XFS_MOUNT_COMPAT_IOSIZE;
346 } else if (!strcmp(this_char, MNTOPT_ATTR2)) {
347 mp->m_flags |= XFS_MOUNT_ATTR2;
348 } else if (!strcmp(this_char, MNTOPT_NOATTR2)) {
349 mp->m_flags &= ~XFS_MOUNT_ATTR2;
350 mp->m_flags |= XFS_MOUNT_NOATTR2;
351 } else if (!strcmp(this_char, MNTOPT_FILESTREAM)) {
352 mp->m_flags |= XFS_MOUNT_FILESTREAMS;
353 } else if (!strcmp(this_char, MNTOPT_NOQUOTA)) {
354 mp->m_qflags &= ~(XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE |
355 XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE |
356 XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE |
357 XFS_UQUOTA_ENFD | XFS_OQUOTA_ENFD);
358 } else if (!strcmp(this_char, MNTOPT_QUOTA) ||
359 !strcmp(this_char, MNTOPT_UQUOTA) ||
360 !strcmp(this_char, MNTOPT_USRQUOTA)) {
361 mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE |
362 XFS_UQUOTA_ENFD);
363 } else if (!strcmp(this_char, MNTOPT_QUOTANOENF) ||
364 !strcmp(this_char, MNTOPT_UQUOTANOENF)) {
365 mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE);
366 mp->m_qflags &= ~XFS_UQUOTA_ENFD;
367 } else if (!strcmp(this_char, MNTOPT_PQUOTA) ||
368 !strcmp(this_char, MNTOPT_PRJQUOTA)) {
369 mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE |
370 XFS_OQUOTA_ENFD);
371 } else if (!strcmp(this_char, MNTOPT_PQUOTANOENF)) {
372 mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE);
373 mp->m_qflags &= ~XFS_OQUOTA_ENFD;
374 } else if (!strcmp(this_char, MNTOPT_GQUOTA) ||
375 !strcmp(this_char, MNTOPT_GRPQUOTA)) {
376 mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE |
377 XFS_OQUOTA_ENFD);
378 } else if (!strcmp(this_char, MNTOPT_GQUOTANOENF)) {
379 mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE);
380 mp->m_qflags &= ~XFS_OQUOTA_ENFD;
381 } else if (!strcmp(this_char, MNTOPT_DMAPI)) {
382 mp->m_flags |= XFS_MOUNT_DMAPI;
383 } else if (!strcmp(this_char, MNTOPT_XDSM)) {
384 mp->m_flags |= XFS_MOUNT_DMAPI;
385 } else if (!strcmp(this_char, MNTOPT_DMI)) {
386 mp->m_flags |= XFS_MOUNT_DMAPI;
387 } else if (!strcmp(this_char, "ihashsize")) {
388 cmn_err(CE_WARN,
389 "XFS: ihashsize no longer used, option is deprecated.");
390 } else if (!strcmp(this_char, "osyncisdsync")) {
391 /* no-op, this is now the default */
392 cmn_err(CE_WARN,
393 "XFS: osyncisdsync is now the default, option is deprecated.");
394 } else if (!strcmp(this_char, "irixsgid")) {
395 cmn_err(CE_WARN,
396 "XFS: irixsgid is now a sysctl(2) variable, option is deprecated.");
397 } else {
398 cmn_err(CE_WARN,
399 "XFS: unknown mount option [%s].", this_char);
400 return EINVAL;
401 }
402 }
403
404 /*
405 * no recovery flag requires a read-only mount
406 */
407 if ((mp->m_flags & XFS_MOUNT_NORECOVERY) &&
408 !(mp->m_flags & XFS_MOUNT_RDONLY)) {
409 cmn_err(CE_WARN, "XFS: no-recovery mounts must be read-only.");
410 return EINVAL;
411 }
412
413 if ((mp->m_flags & XFS_MOUNT_NOALIGN) && (dsunit || dswidth)) {
414 cmn_err(CE_WARN,
415 "XFS: sunit and swidth options incompatible with the noalign option");
416 return EINVAL;
417 }
418
419 if ((mp->m_qflags & (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE)) &&
420 (mp->m_qflags & (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE))) {
421 cmn_err(CE_WARN,
422 "XFS: cannot mount with both project and group quota");
423 return EINVAL;
424 }
425
426 if ((mp->m_flags & XFS_MOUNT_DMAPI) && (!*mtpt || *mtpt[0] == '\0')) {
427 printk("XFS: %s option needs the mount point option as well\n",
428 MNTOPT_DMAPI);
429 return EINVAL;
430 }
431
432 if ((dsunit && !dswidth) || (!dsunit && dswidth)) {
433 cmn_err(CE_WARN,
434 "XFS: sunit and swidth must be specified together");
435 return EINVAL;
436 }
437
438 if (dsunit && (dswidth % dsunit != 0)) {
439 cmn_err(CE_WARN,
440 "XFS: stripe width (%d) must be a multiple of the stripe unit (%d)",
441 dswidth, dsunit);
442 return EINVAL;
443 }
444
445 /*
446 * Applications using DMI filesystems often expect the
447 * inode generation number to be monotonically increasing.
448 * If we delete inode chunks we break this assumption, so
449 * keep unused inode chunks on disk for DMI filesystems
450 * until we come up with a better solution.
451 * Note that if "ikeep" or "noikeep" mount options are
452 * supplied, then they are honored.
453 */
454 if ((mp->m_flags & XFS_MOUNT_DMAPI) && dmapi_implies_ikeep)
455 mp->m_flags |= XFS_MOUNT_IKEEP;
456
457 done:
458 if (!(mp->m_flags & XFS_MOUNT_NOALIGN)) {
459 /*
460 * At this point the superblock has not been read
461 * in, therefore we do not know the block size.
462 * Before the mount call ends we will convert
463 * these to FSBs.
464 */
465 if (dsunit) {
466 mp->m_dalign = dsunit;
467 mp->m_flags |= XFS_MOUNT_RETERR;
468 }
469
470 if (dswidth)
471 mp->m_swidth = dswidth;
472 }
473
474 if (mp->m_logbufs != -1 &&
475 mp->m_logbufs != 0 &&
476 (mp->m_logbufs < XLOG_MIN_ICLOGS ||
477 mp->m_logbufs > XLOG_MAX_ICLOGS)) {
478 cmn_err(CE_WARN,
479 "XFS: invalid logbufs value: %d [not %d-%d]",
480 mp->m_logbufs, XLOG_MIN_ICLOGS, XLOG_MAX_ICLOGS);
481 return XFS_ERROR(EINVAL);
482 }
483 if (mp->m_logbsize != -1 &&
484 mp->m_logbsize != 0 &&
485 (mp->m_logbsize < XLOG_MIN_RECORD_BSIZE ||
486 mp->m_logbsize > XLOG_MAX_RECORD_BSIZE ||
487 !is_power_of_2(mp->m_logbsize))) {
488 cmn_err(CE_WARN,
489 "XFS: invalid logbufsize: %d [not 16k,32k,64k,128k or 256k]",
490 mp->m_logbsize);
491 return XFS_ERROR(EINVAL);
492 }
493
494 mp->m_fsname = kstrndup(sb->s_id, MAXNAMELEN, GFP_KERNEL);
495 if (!mp->m_fsname)
496 return ENOMEM;
497 mp->m_fsname_len = strlen(mp->m_fsname) + 1;
498
499 if (iosizelog) {
500 if (iosizelog > XFS_MAX_IO_LOG ||
501 iosizelog < XFS_MIN_IO_LOG) {
502 cmn_err(CE_WARN,
503 "XFS: invalid log iosize: %d [not %d-%d]",
504 iosizelog, XFS_MIN_IO_LOG,
505 XFS_MAX_IO_LOG);
506 return XFS_ERROR(EINVAL);
507 }
508
509 mp->m_flags |= XFS_MOUNT_DFLT_IOSIZE;
510 mp->m_readio_log = iosizelog;
511 mp->m_writeio_log = iosizelog;
512 }
513
514 return 0;
515 }
516
517 struct proc_xfs_info {
518 int flag;
519 char *str;
520 };
521
522 STATIC int
523 xfs_showargs(
524 struct xfs_mount *mp,
525 struct seq_file *m)
526 {
527 static struct proc_xfs_info xfs_info_set[] = {
528 /* the few simple ones we can get from the mount struct */
529 { XFS_MOUNT_IKEEP, "," MNTOPT_IKEEP },
530 { XFS_MOUNT_WSYNC, "," MNTOPT_WSYNC },
531 { XFS_MOUNT_INO64, "," MNTOPT_INO64 },
532 { XFS_MOUNT_NOALIGN, "," MNTOPT_NOALIGN },
533 { XFS_MOUNT_SWALLOC, "," MNTOPT_SWALLOC },
534 { XFS_MOUNT_NOUUID, "," MNTOPT_NOUUID },
535 { XFS_MOUNT_NORECOVERY, "," MNTOPT_NORECOVERY },
536 { XFS_MOUNT_OSYNCISOSYNC, "," MNTOPT_OSYNCISOSYNC },
537 { XFS_MOUNT_ATTR2, "," MNTOPT_ATTR2 },
538 { XFS_MOUNT_FILESTREAMS, "," MNTOPT_FILESTREAM },
539 { XFS_MOUNT_DMAPI, "," MNTOPT_DMAPI },
540 { XFS_MOUNT_GRPID, "," MNTOPT_GRPID },
541 { 0, NULL }
542 };
543 static struct proc_xfs_info xfs_info_unset[] = {
544 /* the few simple ones we can get from the mount struct */
545 { XFS_MOUNT_COMPAT_IOSIZE, "," MNTOPT_LARGEIO },
546 { XFS_MOUNT_BARRIER, "," MNTOPT_NOBARRIER },
547 { XFS_MOUNT_SMALL_INUMS, "," MNTOPT_64BITINODE },
548 { 0, NULL }
549 };
550 struct proc_xfs_info *xfs_infop;
551
552 for (xfs_infop = xfs_info_set; xfs_infop->flag; xfs_infop++) {
553 if (mp->m_flags & xfs_infop->flag)
554 seq_puts(m, xfs_infop->str);
555 }
556 for (xfs_infop = xfs_info_unset; xfs_infop->flag; xfs_infop++) {
557 if (!(mp->m_flags & xfs_infop->flag))
558 seq_puts(m, xfs_infop->str);
559 }
560
561 if (mp->m_flags & XFS_MOUNT_DFLT_IOSIZE)
562 seq_printf(m, "," MNTOPT_ALLOCSIZE "=%dk",
563 (int)(1 << mp->m_writeio_log) >> 10);
564
565 if (mp->m_logbufs > 0)
566 seq_printf(m, "," MNTOPT_LOGBUFS "=%d", mp->m_logbufs);
567 if (mp->m_logbsize > 0)
568 seq_printf(m, "," MNTOPT_LOGBSIZE "=%dk", mp->m_logbsize >> 10);
569
570 if (mp->m_logname)
571 seq_printf(m, "," MNTOPT_LOGDEV "=%s", mp->m_logname);
572 if (mp->m_rtname)
573 seq_printf(m, "," MNTOPT_RTDEV "=%s", mp->m_rtname);
574
575 if (mp->m_dalign > 0)
576 seq_printf(m, "," MNTOPT_SUNIT "=%d",
577 (int)XFS_FSB_TO_BB(mp, mp->m_dalign));
578 if (mp->m_swidth > 0)
579 seq_printf(m, "," MNTOPT_SWIDTH "=%d",
580 (int)XFS_FSB_TO_BB(mp, mp->m_swidth));
581
582 if (mp->m_qflags & (XFS_UQUOTA_ACCT|XFS_UQUOTA_ENFD))
583 seq_puts(m, "," MNTOPT_USRQUOTA);
584 else if (mp->m_qflags & XFS_UQUOTA_ACCT)
585 seq_puts(m, "," MNTOPT_UQUOTANOENF);
586
587 if (mp->m_qflags & (XFS_PQUOTA_ACCT|XFS_OQUOTA_ENFD))
588 seq_puts(m, "," MNTOPT_PRJQUOTA);
589 else if (mp->m_qflags & XFS_PQUOTA_ACCT)
590 seq_puts(m, "," MNTOPT_PQUOTANOENF);
591
592 if (mp->m_qflags & (XFS_GQUOTA_ACCT|XFS_OQUOTA_ENFD))
593 seq_puts(m, "," MNTOPT_GRPQUOTA);
594 else if (mp->m_qflags & XFS_GQUOTA_ACCT)
595 seq_puts(m, "," MNTOPT_GQUOTANOENF);
596
597 if (!(mp->m_qflags & XFS_ALL_QUOTA_ACCT))
598 seq_puts(m, "," MNTOPT_NOQUOTA);
599
600 return 0;
601 }
602 __uint64_t
603 xfs_max_file_offset(
604 unsigned int blockshift)
605 {
606 unsigned int pagefactor = 1;
607 unsigned int bitshift = BITS_PER_LONG - 1;
608
609 /* Figure out maximum filesize, on Linux this can depend on
610 * the filesystem blocksize (on 32 bit platforms).
611 * __block_prepare_write does this in an [unsigned] long...
612 * page->index << (PAGE_CACHE_SHIFT - bbits)
613 * So, for page sized blocks (4K on 32 bit platforms),
614 * this wraps at around 8Tb (hence MAX_LFS_FILESIZE which is
615 * (((u64)PAGE_CACHE_SIZE << (BITS_PER_LONG-1))-1)
616 * but for smaller blocksizes it is less (bbits = log2 bsize).
617 * Note1: get_block_t takes a long (implicit cast from above)
618 * Note2: The Large Block Device (LBD and HAVE_SECTOR_T) patch
619 * can optionally convert the [unsigned] long from above into
620 * an [unsigned] long long.
621 */
622
623 #if BITS_PER_LONG == 32
624 # if defined(CONFIG_LBD)
625 ASSERT(sizeof(sector_t) == 8);
626 pagefactor = PAGE_CACHE_SIZE;
627 bitshift = BITS_PER_LONG;
628 # else
629 pagefactor = PAGE_CACHE_SIZE >> (PAGE_CACHE_SHIFT - blockshift);
630 # endif
631 #endif
632
633 return (((__uint64_t)pagefactor) << bitshift) - 1;
634 }
635
636 STATIC int
637 xfs_blkdev_get(
638 xfs_mount_t *mp,
639 const char *name,
640 struct block_device **bdevp)
641 {
642 int error = 0;
643
644 *bdevp = open_bdev_exclusive(name, FMODE_READ|FMODE_WRITE, mp);
645 if (IS_ERR(*bdevp)) {
646 error = PTR_ERR(*bdevp);
647 printk("XFS: Invalid device [%s], error=%d\n", name, error);
648 }
649
650 return -error;
651 }
652
653 STATIC void
654 xfs_blkdev_put(
655 struct block_device *bdev)
656 {
657 if (bdev)
658 close_bdev_exclusive(bdev, FMODE_READ|FMODE_WRITE);
659 }
660
661 /*
662 * Try to write out the superblock using barriers.
663 */
664 STATIC int
665 xfs_barrier_test(
666 xfs_mount_t *mp)
667 {
668 xfs_buf_t *sbp = xfs_getsb(mp, 0);
669 int error;
670
671 XFS_BUF_UNDONE(sbp);
672 XFS_BUF_UNREAD(sbp);
673 XFS_BUF_UNDELAYWRITE(sbp);
674 XFS_BUF_WRITE(sbp);
675 XFS_BUF_UNASYNC(sbp);
676 XFS_BUF_ORDERED(sbp);
677
678 xfsbdstrat(mp, sbp);
679 error = xfs_iowait(sbp);
680
681 /*
682 * Clear all the flags we set and possible error state in the
683 * buffer. We only did the write to try out whether barriers
684 * worked and shouldn't leave any traces in the superblock
685 * buffer.
686 */
687 XFS_BUF_DONE(sbp);
688 XFS_BUF_ERROR(sbp, 0);
689 XFS_BUF_UNORDERED(sbp);
690
691 xfs_buf_relse(sbp);
692 return error;
693 }
694
695 void
696 xfs_mountfs_check_barriers(xfs_mount_t *mp)
697 {
698 int error;
699
700 if (mp->m_logdev_targp != mp->m_ddev_targp) {
701 xfs_fs_cmn_err(CE_NOTE, mp,
702 "Disabling barriers, not supported with external log device");
703 mp->m_flags &= ~XFS_MOUNT_BARRIER;
704 return;
705 }
706
707 if (xfs_readonly_buftarg(mp->m_ddev_targp)) {
708 xfs_fs_cmn_err(CE_NOTE, mp,
709 "Disabling barriers, underlying device is readonly");
710 mp->m_flags &= ~XFS_MOUNT_BARRIER;
711 return;
712 }
713
714 error = xfs_barrier_test(mp);
715 if (error) {
716 xfs_fs_cmn_err(CE_NOTE, mp,
717 "Disabling barriers, trial barrier write failed");
718 mp->m_flags &= ~XFS_MOUNT_BARRIER;
719 return;
720 }
721 }
722
723 void
724 xfs_blkdev_issue_flush(
725 xfs_buftarg_t *buftarg)
726 {
727 blkdev_issue_flush(buftarg->bt_bdev, NULL);
728 }
729
730 STATIC void
731 xfs_close_devices(
732 struct xfs_mount *mp)
733 {
734 if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp) {
735 struct block_device *logdev = mp->m_logdev_targp->bt_bdev;
736 xfs_free_buftarg(mp, mp->m_logdev_targp);
737 xfs_blkdev_put(logdev);
738 }
739 if (mp->m_rtdev_targp) {
740 struct block_device *rtdev = mp->m_rtdev_targp->bt_bdev;
741 xfs_free_buftarg(mp, mp->m_rtdev_targp);
742 xfs_blkdev_put(rtdev);
743 }
744 xfs_free_buftarg(mp, mp->m_ddev_targp);
745 }
746
747 /*
748 * The file system configurations are:
749 * (1) device (partition) with data and internal log
750 * (2) logical volume with data and log subvolumes.
751 * (3) logical volume with data, log, and realtime subvolumes.
752 *
753 * We only have to handle opening the log and realtime volumes here if
754 * they are present. The data subvolume has already been opened by
755 * get_sb_bdev() and is stored in sb->s_bdev.
756 */
757 STATIC int
758 xfs_open_devices(
759 struct xfs_mount *mp)
760 {
761 struct block_device *ddev = mp->m_super->s_bdev;
762 struct block_device *logdev = NULL, *rtdev = NULL;
763 int error;
764
765 /*
766 * Open real time and log devices - order is important.
767 */
768 if (mp->m_logname) {
769 error = xfs_blkdev_get(mp, mp->m_logname, &logdev);
770 if (error)
771 goto out;
772 }
773
774 if (mp->m_rtname) {
775 error = xfs_blkdev_get(mp, mp->m_rtname, &rtdev);
776 if (error)
777 goto out_close_logdev;
778
779 if (rtdev == ddev || rtdev == logdev) {
780 cmn_err(CE_WARN,
781 "XFS: Cannot mount filesystem with identical rtdev and ddev/logdev.");
782 error = EINVAL;
783 goto out_close_rtdev;
784 }
785 }
786
787 /*
788 * Setup xfs_mount buffer target pointers
789 */
790 error = ENOMEM;
791 mp->m_ddev_targp = xfs_alloc_buftarg(ddev, 0);
792 if (!mp->m_ddev_targp)
793 goto out_close_rtdev;
794
795 if (rtdev) {
796 mp->m_rtdev_targp = xfs_alloc_buftarg(rtdev, 1);
797 if (!mp->m_rtdev_targp)
798 goto out_free_ddev_targ;
799 }
800
801 if (logdev && logdev != ddev) {
802 mp->m_logdev_targp = xfs_alloc_buftarg(logdev, 1);
803 if (!mp->m_logdev_targp)
804 goto out_free_rtdev_targ;
805 } else {
806 mp->m_logdev_targp = mp->m_ddev_targp;
807 }
808
809 return 0;
810
811 out_free_rtdev_targ:
812 if (mp->m_rtdev_targp)
813 xfs_free_buftarg(mp, mp->m_rtdev_targp);
814 out_free_ddev_targ:
815 xfs_free_buftarg(mp, mp->m_ddev_targp);
816 out_close_rtdev:
817 if (rtdev)
818 xfs_blkdev_put(rtdev);
819 out_close_logdev:
820 if (logdev && logdev != ddev)
821 xfs_blkdev_put(logdev);
822 out:
823 return error;
824 }
825
826 /*
827 * Setup xfs_mount buffer target pointers based on superblock
828 */
829 STATIC int
830 xfs_setup_devices(
831 struct xfs_mount *mp)
832 {
833 int error;
834
835 error = xfs_setsize_buftarg(mp->m_ddev_targp, mp->m_sb.sb_blocksize,
836 mp->m_sb.sb_sectsize);
837 if (error)
838 return error;
839
840 if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp) {
841 unsigned int log_sector_size = BBSIZE;
842
843 if (xfs_sb_version_hassector(&mp->m_sb))
844 log_sector_size = mp->m_sb.sb_logsectsize;
845 error = xfs_setsize_buftarg(mp->m_logdev_targp,
846 mp->m_sb.sb_blocksize,
847 log_sector_size);
848 if (error)
849 return error;
850 }
851 if (mp->m_rtdev_targp) {
852 error = xfs_setsize_buftarg(mp->m_rtdev_targp,
853 mp->m_sb.sb_blocksize,
854 mp->m_sb.sb_sectsize);
855 if (error)
856 return error;
857 }
858
859 return 0;
860 }
861
862 /*
863 * XFS AIL push thread support
864 */
865 void
866 xfsaild_wakeup(
867 struct xfs_ail *ailp,
868 xfs_lsn_t threshold_lsn)
869 {
870 ailp->xa_target = threshold_lsn;
871 wake_up_process(ailp->xa_task);
872 }
873
874 STATIC int
875 xfsaild(
876 void *data)
877 {
878 struct xfs_ail *ailp = data;
879 xfs_lsn_t last_pushed_lsn = 0;
880 long tout = 0;
881
882 while (!kthread_should_stop()) {
883 if (tout)
884 schedule_timeout_interruptible(msecs_to_jiffies(tout));
885 tout = 1000;
886
887 /* swsusp */
888 try_to_freeze();
889
890 ASSERT(ailp->xa_mount->m_log);
891 if (XFS_FORCED_SHUTDOWN(ailp->xa_mount))
892 continue;
893
894 tout = xfsaild_push(ailp, &last_pushed_lsn);
895 }
896
897 return 0;
898 } /* xfsaild */
899
900 int
901 xfsaild_start(
902 struct xfs_ail *ailp)
903 {
904 ailp->xa_target = 0;
905 ailp->xa_task = kthread_run(xfsaild, ailp, "xfsaild");
906 if (IS_ERR(ailp->xa_task))
907 return -PTR_ERR(ailp->xa_task);
908 return 0;
909 }
910
911 void
912 xfsaild_stop(
913 struct xfs_ail *ailp)
914 {
915 kthread_stop(ailp->xa_task);
916 }
917
918
919 /* Catch misguided souls that try to use this interface on XFS */
920 STATIC struct inode *
921 xfs_fs_alloc_inode(
922 struct super_block *sb)
923 {
924 BUG();
925 return NULL;
926 }
927
928 /*
929 * Now that the generic code is guaranteed not to be accessing
930 * the linux inode, we can reclaim the inode.
931 */
932 STATIC void
933 xfs_fs_destroy_inode(
934 struct inode *inode)
935 {
936 xfs_inode_t *ip = XFS_I(inode);
937
938 XFS_STATS_INC(vn_reclaim);
939 if (xfs_reclaim(ip))
940 panic("%s: cannot reclaim 0x%p\n", __func__, inode);
941 }
942
943 /*
944 * Slab object creation initialisation for the XFS inode.
945 * This covers only the idempotent fields in the XFS inode;
946 * all other fields need to be initialised on allocation
947 * from the slab. This avoids the need to repeatedly intialise
948 * fields in the xfs inode that left in the initialise state
949 * when freeing the inode.
950 */
951 STATIC void
952 xfs_fs_inode_init_once(
953 void *inode)
954 {
955 struct xfs_inode *ip = inode;
956
957 memset(ip, 0, sizeof(struct xfs_inode));
958
959 /* vfs inode */
960 inode_init_once(VFS_I(ip));
961
962 /* xfs inode */
963 atomic_set(&ip->i_iocount, 0);
964 atomic_set(&ip->i_pincount, 0);
965 spin_lock_init(&ip->i_flags_lock);
966 init_waitqueue_head(&ip->i_ipin_wait);
967 /*
968 * Because we want to use a counting completion, complete
969 * the flush completion once to allow a single access to
970 * the flush completion without blocking.
971 */
972 init_completion(&ip->i_flush);
973 complete(&ip->i_flush);
974
975 mrlock_init(&ip->i_lock, MRLOCK_ALLOW_EQUAL_PRI|MRLOCK_BARRIER,
976 "xfsino", ip->i_ino);
977 mrlock_init(&ip->i_iolock, MRLOCK_BARRIER, "xfsio", ip->i_ino);
978 }
979
980 /*
981 * Attempt to flush the inode, this will actually fail
982 * if the inode is pinned, but we dirty the inode again
983 * at the point when it is unpinned after a log write,
984 * since this is when the inode itself becomes flushable.
985 */
986 STATIC int
987 xfs_fs_write_inode(
988 struct inode *inode,
989 int sync)
990 {
991 struct xfs_inode *ip = XFS_I(inode);
992 struct xfs_mount *mp = ip->i_mount;
993 int error = 0;
994
995 xfs_itrace_entry(ip);
996
997 if (XFS_FORCED_SHUTDOWN(mp))
998 return XFS_ERROR(EIO);
999
1000 if (sync) {
1001 error = xfs_wait_on_pages(ip, 0, -1);
1002 if (error)
1003 goto out;
1004 }
1005
1006 /*
1007 * Bypass inodes which have already been cleaned by
1008 * the inode flush clustering code inside xfs_iflush
1009 */
1010 if (xfs_inode_clean(ip))
1011 goto out;
1012
1013 /*
1014 * We make this non-blocking if the inode is contended, return
1015 * EAGAIN to indicate to the caller that they did not succeed.
1016 * This prevents the flush path from blocking on inodes inside
1017 * another operation right now, they get caught later by xfs_sync.
1018 */
1019 if (sync) {
1020 xfs_ilock(ip, XFS_ILOCK_SHARED);
1021 xfs_iflock(ip);
1022
1023 error = xfs_iflush(ip, XFS_IFLUSH_SYNC);
1024 } else {
1025 error = EAGAIN;
1026 if (!xfs_ilock_nowait(ip, XFS_ILOCK_SHARED))
1027 goto out;
1028 if (xfs_ipincount(ip) || !xfs_iflock_nowait(ip))
1029 goto out_unlock;
1030
1031 error = xfs_iflush(ip, XFS_IFLUSH_ASYNC_NOBLOCK);
1032 }
1033
1034 out_unlock:
1035 xfs_iunlock(ip, XFS_ILOCK_SHARED);
1036 out:
1037 /*
1038 * if we failed to write out the inode then mark
1039 * it dirty again so we'll try again later.
1040 */
1041 if (error)
1042 xfs_mark_inode_dirty_sync(ip);
1043 return -error;
1044 }
1045
1046 STATIC void
1047 xfs_fs_clear_inode(
1048 struct inode *inode)
1049 {
1050 xfs_inode_t *ip = XFS_I(inode);
1051
1052 xfs_itrace_entry(ip);
1053 XFS_STATS_INC(vn_rele);
1054 XFS_STATS_INC(vn_remove);
1055 XFS_STATS_DEC(vn_active);
1056
1057 xfs_inactive(ip);
1058 }
1059
1060 STATIC void
1061 xfs_free_fsname(
1062 struct xfs_mount *mp)
1063 {
1064 kfree(mp->m_fsname);
1065 kfree(mp->m_rtname);
1066 kfree(mp->m_logname);
1067 }
1068
1069 STATIC void
1070 xfs_fs_put_super(
1071 struct super_block *sb)
1072 {
1073 struct xfs_mount *mp = XFS_M(sb);
1074 struct xfs_inode *rip = mp->m_rootip;
1075 int unmount_event_flags = 0;
1076
1077 xfs_syncd_stop(mp);
1078 xfs_sync_inodes(mp, SYNC_ATTR|SYNC_DELWRI);
1079
1080 #ifdef HAVE_DMAPI
1081 if (mp->m_flags & XFS_MOUNT_DMAPI) {
1082 unmount_event_flags =
1083 (mp->m_dmevmask & (1 << DM_EVENT_UNMOUNT)) ?
1084 0 : DM_FLAGS_UNWANTED;
1085 /*
1086 * Ignore error from dmapi here, first unmount is not allowed
1087 * to fail anyway, and second we wouldn't want to fail a
1088 * unmount because of dmapi.
1089 */
1090 XFS_SEND_PREUNMOUNT(mp, rip, DM_RIGHT_NULL, rip, DM_RIGHT_NULL,
1091 NULL, NULL, 0, 0, unmount_event_flags);
1092 }
1093 #endif
1094
1095 /*
1096 * Blow away any referenced inode in the filestreams cache.
1097 * This can and will cause log traffic as inodes go inactive
1098 * here.
1099 */
1100 xfs_filestream_unmount(mp);
1101
1102 XFS_bflush(mp->m_ddev_targp);
1103
1104 if (mp->m_flags & XFS_MOUNT_DMAPI) {
1105 XFS_SEND_UNMOUNT(mp, rip, DM_RIGHT_NULL, 0, 0,
1106 unmount_event_flags);
1107 }
1108
1109 xfs_unmountfs(mp);
1110 xfs_freesb(mp);
1111 xfs_icsb_destroy_counters(mp);
1112 xfs_close_devices(mp);
1113 xfs_qmops_put(mp);
1114 xfs_dmops_put(mp);
1115 xfs_free_fsname(mp);
1116 kfree(mp);
1117 }
1118
1119 STATIC void
1120 xfs_fs_write_super(
1121 struct super_block *sb)
1122 {
1123 if (!(sb->s_flags & MS_RDONLY))
1124 xfs_sync_fsdata(XFS_M(sb), 0);
1125 sb->s_dirt = 0;
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 sb->s_dirt = 0;
1153
1154 if (unlikely(laptop_mode)) {
1155 int prev_sync_seq = mp->m_sync_seq;
1156
1157 /*
1158 * The disk must be active because we're syncing.
1159 * We schedule xfssyncd now (now that the disk is
1160 * active) instead of later (when it might not be).
1161 */
1162 wake_up_process(mp->m_sync_task);
1163 /*
1164 * We have to wait for the sync iteration to complete.
1165 * If we don't, the disk activity caused by the sync
1166 * will come after the sync is completed, and that
1167 * triggers another sync from laptop mode.
1168 */
1169 wait_event(mp->m_wait_single_sync_task,
1170 mp->m_sync_seq != prev_sync_seq);
1171 }
1172
1173 return -error;
1174 }
1175
1176 STATIC int
1177 xfs_fs_statfs(
1178 struct dentry *dentry,
1179 struct kstatfs *statp)
1180 {
1181 struct xfs_mount *mp = XFS_M(dentry->d_sb);
1182 xfs_sb_t *sbp = &mp->m_sb;
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 #if XFS_BIG_INUMS
1203 fakeinos += mp->m_inoadd;
1204 #endif
1205 statp->f_files =
1206 MIN(sbp->sb_icount + fakeinos, (__uint64_t)XFS_MAXINUMBER);
1207 if (mp->m_maxicount)
1208 #if XFS_BIG_INUMS
1209 if (!mp->m_inoadd)
1210 #endif
1211 statp->f_files = min_t(typeof(statp->f_files),
1212 statp->f_files,
1213 mp->m_maxicount);
1214 statp->f_ffree = statp->f_files - (sbp->sb_icount - sbp->sb_ifree);
1215 spin_unlock(&mp->m_sb_lock);
1216
1217 XFS_QM_DQSTATVFS(XFS_I(dentry->d_inode), statp);
1218 return 0;
1219 }
1220
1221 STATIC int
1222 xfs_fs_remount(
1223 struct super_block *sb,
1224 int *flags,
1225 char *options)
1226 {
1227 struct xfs_mount *mp = XFS_M(sb);
1228 substring_t args[MAX_OPT_ARGS];
1229 char *p;
1230 int error;
1231
1232 while ((p = strsep(&options, ",")) != NULL) {
1233 int token;
1234
1235 if (!*p)
1236 continue;
1237
1238 token = match_token(p, tokens, args);
1239 switch (token) {
1240 case Opt_barrier:
1241 mp->m_flags |= XFS_MOUNT_BARRIER;
1242
1243 /*
1244 * Test if barriers are actually working if we can,
1245 * else delay this check until the filesystem is
1246 * marked writeable.
1247 */
1248 if (!(mp->m_flags & XFS_MOUNT_RDONLY))
1249 xfs_mountfs_check_barriers(mp);
1250 break;
1251 case Opt_nobarrier:
1252 mp->m_flags &= ~XFS_MOUNT_BARRIER;
1253 break;
1254 default:
1255 /*
1256 * Logically we would return an error here to prevent
1257 * users from believing they might have changed
1258 * mount options using remount which can't be changed.
1259 *
1260 * But unfortunately mount(8) adds all options from
1261 * mtab and fstab to the mount arguments in some cases
1262 * so we can't blindly reject options, but have to
1263 * check for each specified option if it actually
1264 * differs from the currently set option and only
1265 * reject it if that's the case.
1266 *
1267 * Until that is implemented we return success for
1268 * every remount request, and silently ignore all
1269 * options that we can't actually change.
1270 */
1271 #if 0
1272 printk(KERN_INFO
1273 "XFS: mount option \"%s\" not supported for remount\n", p);
1274 return -EINVAL;
1275 #else
1276 break;
1277 #endif
1278 }
1279 }
1280
1281 /* ro -> rw */
1282 if ((mp->m_flags & XFS_MOUNT_RDONLY) && !(*flags & MS_RDONLY)) {
1283 mp->m_flags &= ~XFS_MOUNT_RDONLY;
1284 if (mp->m_flags & XFS_MOUNT_BARRIER)
1285 xfs_mountfs_check_barriers(mp);
1286
1287 /*
1288 * If this is the first remount to writeable state we
1289 * might have some superblock changes to update.
1290 */
1291 if (mp->m_update_flags) {
1292 error = xfs_mount_log_sb(mp, mp->m_update_flags);
1293 if (error) {
1294 cmn_err(CE_WARN,
1295 "XFS: failed to write sb changes");
1296 return error;
1297 }
1298 mp->m_update_flags = 0;
1299 }
1300 }
1301
1302 /* rw -> ro */
1303 if (!(mp->m_flags & XFS_MOUNT_RDONLY) && (*flags & MS_RDONLY)) {
1304 xfs_quiesce_data(mp);
1305 xfs_quiesce_attr(mp);
1306 mp->m_flags |= XFS_MOUNT_RDONLY;
1307 }
1308
1309 return 0;
1310 }
1311
1312 /*
1313 * Second stage of a freeze. The data is already frozen so we only
1314 * need to take care of the metadata. Once that's done write a dummy
1315 * record to dirty the log in case of a crash while frozen.
1316 */
1317 STATIC int
1318 xfs_fs_freeze(
1319 struct super_block *sb)
1320 {
1321 struct xfs_mount *mp = XFS_M(sb);
1322
1323 xfs_quiesce_attr(mp);
1324 return -xfs_fs_log_dummy(mp);
1325 }
1326
1327 STATIC int
1328 xfs_fs_show_options(
1329 struct seq_file *m,
1330 struct vfsmount *mnt)
1331 {
1332 return -xfs_showargs(XFS_M(mnt->mnt_sb), m);
1333 }
1334
1335 /*
1336 * This function fills in xfs_mount_t fields based on mount args.
1337 * Note: the superblock _has_ now been read in.
1338 */
1339 STATIC int
1340 xfs_finish_flags(
1341 struct xfs_mount *mp)
1342 {
1343 int ronly = (mp->m_flags & XFS_MOUNT_RDONLY);
1344
1345 /* Fail a mount where the logbuf is smaller than the log stripe */
1346 if (xfs_sb_version_haslogv2(&mp->m_sb)) {
1347 if (mp->m_logbsize <= 0 &&
1348 mp->m_sb.sb_logsunit > XLOG_BIG_RECORD_BSIZE) {
1349 mp->m_logbsize = mp->m_sb.sb_logsunit;
1350 } else if (mp->m_logbsize > 0 &&
1351 mp->m_logbsize < mp->m_sb.sb_logsunit) {
1352 cmn_err(CE_WARN,
1353 "XFS: logbuf size must be greater than or equal to log stripe size");
1354 return XFS_ERROR(EINVAL);
1355 }
1356 } else {
1357 /* Fail a mount if the logbuf is larger than 32K */
1358 if (mp->m_logbsize > XLOG_BIG_RECORD_BSIZE) {
1359 cmn_err(CE_WARN,
1360 "XFS: logbuf size for version 1 logs must be 16K or 32K");
1361 return XFS_ERROR(EINVAL);
1362 }
1363 }
1364
1365 /*
1366 * mkfs'ed attr2 will turn on attr2 mount unless explicitly
1367 * told by noattr2 to turn it off
1368 */
1369 if (xfs_sb_version_hasattr2(&mp->m_sb) &&
1370 !(mp->m_flags & XFS_MOUNT_NOATTR2))
1371 mp->m_flags |= XFS_MOUNT_ATTR2;
1372
1373 /*
1374 * prohibit r/w mounts of read-only filesystems
1375 */
1376 if ((mp->m_sb.sb_flags & XFS_SBF_READONLY) && !ronly) {
1377 cmn_err(CE_WARN,
1378 "XFS: cannot mount a read-only filesystem as read-write");
1379 return XFS_ERROR(EROFS);
1380 }
1381
1382 return 0;
1383 }
1384
1385 STATIC int
1386 xfs_fs_fill_super(
1387 struct super_block *sb,
1388 void *data,
1389 int silent)
1390 {
1391 struct inode *root;
1392 struct xfs_mount *mp = NULL;
1393 int flags = 0, error = ENOMEM;
1394 char *mtpt = NULL;
1395
1396 mp = kzalloc(sizeof(struct xfs_mount), GFP_KERNEL);
1397 if (!mp)
1398 goto out;
1399
1400 spin_lock_init(&mp->m_sb_lock);
1401 mutex_init(&mp->m_growlock);
1402 atomic_set(&mp->m_active_trans, 0);
1403 INIT_LIST_HEAD(&mp->m_sync_list);
1404 spin_lock_init(&mp->m_sync_lock);
1405 init_waitqueue_head(&mp->m_wait_single_sync_task);
1406
1407 mp->m_super = sb;
1408 sb->s_fs_info = mp;
1409
1410 error = xfs_parseargs(mp, (char *)data, &mtpt);
1411 if (error)
1412 goto out_free_fsname;
1413
1414 sb_min_blocksize(sb, BBSIZE);
1415 sb->s_xattr = xfs_xattr_handlers;
1416 sb->s_export_op = &xfs_export_operations;
1417 #ifdef CONFIG_XFS_QUOTA
1418 sb->s_qcop = &xfs_quotactl_operations;
1419 #endif
1420 sb->s_op = &xfs_super_operations;
1421
1422 error = xfs_dmops_get(mp);
1423 if (error)
1424 goto out_free_fsname;
1425 error = xfs_qmops_get(mp);
1426 if (error)
1427 goto out_put_dmops;
1428
1429 if (silent)
1430 flags |= XFS_MFSI_QUIET;
1431
1432 error = xfs_open_devices(mp);
1433 if (error)
1434 goto out_put_qmops;
1435
1436 if (xfs_icsb_init_counters(mp))
1437 mp->m_flags |= XFS_MOUNT_NO_PERCPU_SB;
1438
1439 error = xfs_readsb(mp, flags);
1440 if (error)
1441 goto out_destroy_counters;
1442
1443 error = xfs_finish_flags(mp);
1444 if (error)
1445 goto out_free_sb;
1446
1447 error = xfs_setup_devices(mp);
1448 if (error)
1449 goto out_free_sb;
1450
1451 if (mp->m_flags & XFS_MOUNT_BARRIER)
1452 xfs_mountfs_check_barriers(mp);
1453
1454 error = xfs_filestream_mount(mp);
1455 if (error)
1456 goto out_free_sb;
1457
1458 error = xfs_mountfs(mp);
1459 if (error)
1460 goto out_filestream_unmount;
1461
1462 XFS_SEND_MOUNT(mp, DM_RIGHT_NULL, mtpt, mp->m_fsname);
1463
1464 sb->s_dirt = 1;
1465 sb->s_magic = XFS_SB_MAGIC;
1466 sb->s_blocksize = mp->m_sb.sb_blocksize;
1467 sb->s_blocksize_bits = ffs(sb->s_blocksize) - 1;
1468 sb->s_maxbytes = xfs_max_file_offset(sb->s_blocksize_bits);
1469 sb->s_time_gran = 1;
1470 set_posix_acl_flag(sb);
1471
1472 root = igrab(VFS_I(mp->m_rootip));
1473 if (!root) {
1474 error = ENOENT;
1475 goto fail_unmount;
1476 }
1477 if (is_bad_inode(root)) {
1478 error = EINVAL;
1479 goto fail_vnrele;
1480 }
1481 sb->s_root = d_alloc_root(root);
1482 if (!sb->s_root) {
1483 error = ENOMEM;
1484 goto fail_vnrele;
1485 }
1486
1487 error = xfs_syncd_init(mp);
1488 if (error)
1489 goto fail_vnrele;
1490
1491 kfree(mtpt);
1492
1493 xfs_itrace_exit(XFS_I(sb->s_root->d_inode));
1494 return 0;
1495
1496 out_filestream_unmount:
1497 xfs_filestream_unmount(mp);
1498 out_free_sb:
1499 xfs_freesb(mp);
1500 out_destroy_counters:
1501 xfs_icsb_destroy_counters(mp);
1502 xfs_close_devices(mp);
1503 out_put_qmops:
1504 xfs_qmops_put(mp);
1505 out_put_dmops:
1506 xfs_dmops_put(mp);
1507 out_free_fsname:
1508 xfs_free_fsname(mp);
1509 kfree(mtpt);
1510 kfree(mp);
1511 out:
1512 return -error;
1513
1514 fail_vnrele:
1515 if (sb->s_root) {
1516 dput(sb->s_root);
1517 sb->s_root = NULL;
1518 } else {
1519 iput(root);
1520 }
1521
1522 fail_unmount:
1523 /*
1524 * Blow away any referenced inode in the filestreams cache.
1525 * This can and will cause log traffic as inodes go inactive
1526 * here.
1527 */
1528 xfs_filestream_unmount(mp);
1529
1530 XFS_bflush(mp->m_ddev_targp);
1531
1532 xfs_unmountfs(mp);
1533 goto out_free_sb;
1534 }
1535
1536 STATIC int
1537 xfs_fs_get_sb(
1538 struct file_system_type *fs_type,
1539 int flags,
1540 const char *dev_name,
1541 void *data,
1542 struct vfsmount *mnt)
1543 {
1544 return get_sb_bdev(fs_type, flags, dev_name, data, xfs_fs_fill_super,
1545 mnt);
1546 }
1547
1548 static struct super_operations xfs_super_operations = {
1549 .alloc_inode = xfs_fs_alloc_inode,
1550 .destroy_inode = xfs_fs_destroy_inode,
1551 .write_inode = xfs_fs_write_inode,
1552 .clear_inode = xfs_fs_clear_inode,
1553 .put_super = xfs_fs_put_super,
1554 .write_super = xfs_fs_write_super,
1555 .sync_fs = xfs_fs_sync_super,
1556 .freeze_fs = xfs_fs_freeze,
1557 .statfs = xfs_fs_statfs,
1558 .remount_fs = xfs_fs_remount,
1559 .show_options = xfs_fs_show_options,
1560 };
1561
1562 static struct file_system_type xfs_fs_type = {
1563 .owner = THIS_MODULE,
1564 .name = "xfs",
1565 .get_sb = xfs_fs_get_sb,
1566 .kill_sb = kill_block_super,
1567 .fs_flags = FS_REQUIRES_DEV,
1568 };
1569
1570 STATIC int __init
1571 xfs_alloc_trace_bufs(void)
1572 {
1573 #ifdef XFS_ALLOC_TRACE
1574 xfs_alloc_trace_buf = ktrace_alloc(XFS_ALLOC_TRACE_SIZE, KM_MAYFAIL);
1575 if (!xfs_alloc_trace_buf)
1576 goto out;
1577 #endif
1578 #ifdef XFS_BMAP_TRACE
1579 xfs_bmap_trace_buf = ktrace_alloc(XFS_BMAP_TRACE_SIZE, KM_MAYFAIL);
1580 if (!xfs_bmap_trace_buf)
1581 goto out_free_alloc_trace;
1582 #endif
1583 #ifdef XFS_BTREE_TRACE
1584 xfs_allocbt_trace_buf = ktrace_alloc(XFS_ALLOCBT_TRACE_SIZE,
1585 KM_MAYFAIL);
1586 if (!xfs_allocbt_trace_buf)
1587 goto out_free_bmap_trace;
1588
1589 xfs_inobt_trace_buf = ktrace_alloc(XFS_INOBT_TRACE_SIZE, KM_MAYFAIL);
1590 if (!xfs_inobt_trace_buf)
1591 goto out_free_allocbt_trace;
1592
1593 xfs_bmbt_trace_buf = ktrace_alloc(XFS_BMBT_TRACE_SIZE, KM_MAYFAIL);
1594 if (!xfs_bmbt_trace_buf)
1595 goto out_free_inobt_trace;
1596 #endif
1597 #ifdef XFS_ATTR_TRACE
1598 xfs_attr_trace_buf = ktrace_alloc(XFS_ATTR_TRACE_SIZE, KM_MAYFAIL);
1599 if (!xfs_attr_trace_buf)
1600 goto out_free_bmbt_trace;
1601 #endif
1602 #ifdef XFS_DIR2_TRACE
1603 xfs_dir2_trace_buf = ktrace_alloc(XFS_DIR2_GTRACE_SIZE, KM_MAYFAIL);
1604 if (!xfs_dir2_trace_buf)
1605 goto out_free_attr_trace;
1606 #endif
1607
1608 return 0;
1609
1610 #ifdef XFS_DIR2_TRACE
1611 out_free_attr_trace:
1612 #endif
1613 #ifdef XFS_ATTR_TRACE
1614 ktrace_free(xfs_attr_trace_buf);
1615 out_free_bmbt_trace:
1616 #endif
1617 #ifdef XFS_BTREE_TRACE
1618 ktrace_free(xfs_bmbt_trace_buf);
1619 out_free_inobt_trace:
1620 ktrace_free(xfs_inobt_trace_buf);
1621 out_free_allocbt_trace:
1622 ktrace_free(xfs_allocbt_trace_buf);
1623 out_free_bmap_trace:
1624 #endif
1625 #ifdef XFS_BMAP_TRACE
1626 ktrace_free(xfs_bmap_trace_buf);
1627 out_free_alloc_trace:
1628 #endif
1629 #ifdef XFS_ALLOC_TRACE
1630 ktrace_free(xfs_alloc_trace_buf);
1631 out:
1632 #endif
1633 return -ENOMEM;
1634 }
1635
1636 STATIC void
1637 xfs_free_trace_bufs(void)
1638 {
1639 #ifdef XFS_DIR2_TRACE
1640 ktrace_free(xfs_dir2_trace_buf);
1641 #endif
1642 #ifdef XFS_ATTR_TRACE
1643 ktrace_free(xfs_attr_trace_buf);
1644 #endif
1645 #ifdef XFS_BTREE_TRACE
1646 ktrace_free(xfs_bmbt_trace_buf);
1647 ktrace_free(xfs_inobt_trace_buf);
1648 ktrace_free(xfs_allocbt_trace_buf);
1649 #endif
1650 #ifdef XFS_BMAP_TRACE
1651 ktrace_free(xfs_bmap_trace_buf);
1652 #endif
1653 #ifdef XFS_ALLOC_TRACE
1654 ktrace_free(xfs_alloc_trace_buf);
1655 #endif
1656 }
1657
1658 STATIC int __init
1659 xfs_init_zones(void)
1660 {
1661
1662 xfs_ioend_zone = kmem_zone_init(sizeof(xfs_ioend_t), "xfs_ioend");
1663 if (!xfs_ioend_zone)
1664 goto out;
1665
1666 xfs_ioend_pool = mempool_create_slab_pool(4 * MAX_BUF_PER_PAGE,
1667 xfs_ioend_zone);
1668 if (!xfs_ioend_pool)
1669 goto out_destroy_ioend_zone;
1670
1671 xfs_log_ticket_zone = kmem_zone_init(sizeof(xlog_ticket_t),
1672 "xfs_log_ticket");
1673 if (!xfs_log_ticket_zone)
1674 goto out_destroy_ioend_pool;
1675
1676 xfs_bmap_free_item_zone = kmem_zone_init(sizeof(xfs_bmap_free_item_t),
1677 "xfs_bmap_free_item");
1678 if (!xfs_bmap_free_item_zone)
1679 goto out_destroy_log_ticket_zone;
1680
1681 xfs_btree_cur_zone = kmem_zone_init(sizeof(xfs_btree_cur_t),
1682 "xfs_btree_cur");
1683 if (!xfs_btree_cur_zone)
1684 goto out_destroy_bmap_free_item_zone;
1685
1686 xfs_da_state_zone = kmem_zone_init(sizeof(xfs_da_state_t),
1687 "xfs_da_state");
1688 if (!xfs_da_state_zone)
1689 goto out_destroy_btree_cur_zone;
1690
1691 xfs_dabuf_zone = kmem_zone_init(sizeof(xfs_dabuf_t), "xfs_dabuf");
1692 if (!xfs_dabuf_zone)
1693 goto out_destroy_da_state_zone;
1694
1695 xfs_ifork_zone = kmem_zone_init(sizeof(xfs_ifork_t), "xfs_ifork");
1696 if (!xfs_ifork_zone)
1697 goto out_destroy_dabuf_zone;
1698
1699 xfs_trans_zone = kmem_zone_init(sizeof(xfs_trans_t), "xfs_trans");
1700 if (!xfs_trans_zone)
1701 goto out_destroy_ifork_zone;
1702
1703 /*
1704 * The size of the zone allocated buf log item is the maximum
1705 * size possible under XFS. This wastes a little bit of memory,
1706 * but it is much faster.
1707 */
1708 xfs_buf_item_zone = kmem_zone_init((sizeof(xfs_buf_log_item_t) +
1709 (((XFS_MAX_BLOCKSIZE / XFS_BLI_CHUNK) /
1710 NBWORD) * sizeof(int))), "xfs_buf_item");
1711 if (!xfs_buf_item_zone)
1712 goto out_destroy_trans_zone;
1713
1714 xfs_efd_zone = kmem_zone_init((sizeof(xfs_efd_log_item_t) +
1715 ((XFS_EFD_MAX_FAST_EXTENTS - 1) *
1716 sizeof(xfs_extent_t))), "xfs_efd_item");
1717 if (!xfs_efd_zone)
1718 goto out_destroy_buf_item_zone;
1719
1720 xfs_efi_zone = kmem_zone_init((sizeof(xfs_efi_log_item_t) +
1721 ((XFS_EFI_MAX_FAST_EXTENTS - 1) *
1722 sizeof(xfs_extent_t))), "xfs_efi_item");
1723 if (!xfs_efi_zone)
1724 goto out_destroy_efd_zone;
1725
1726 xfs_inode_zone =
1727 kmem_zone_init_flags(sizeof(xfs_inode_t), "xfs_inode",
1728 KM_ZONE_HWALIGN | KM_ZONE_RECLAIM | KM_ZONE_SPREAD,
1729 xfs_fs_inode_init_once);
1730 if (!xfs_inode_zone)
1731 goto out_destroy_efi_zone;
1732
1733 xfs_ili_zone =
1734 kmem_zone_init_flags(sizeof(xfs_inode_log_item_t), "xfs_ili",
1735 KM_ZONE_SPREAD, NULL);
1736 if (!xfs_ili_zone)
1737 goto out_destroy_inode_zone;
1738
1739 #ifdef CONFIG_XFS_POSIX_ACL
1740 xfs_acl_zone = kmem_zone_init(sizeof(xfs_acl_t), "xfs_acl");
1741 if (!xfs_acl_zone)
1742 goto out_destroy_ili_zone;
1743 #endif
1744
1745 return 0;
1746
1747 #ifdef CONFIG_XFS_POSIX_ACL
1748 out_destroy_ili_zone:
1749 #endif
1750 kmem_zone_destroy(xfs_ili_zone);
1751 out_destroy_inode_zone:
1752 kmem_zone_destroy(xfs_inode_zone);
1753 out_destroy_efi_zone:
1754 kmem_zone_destroy(xfs_efi_zone);
1755 out_destroy_efd_zone:
1756 kmem_zone_destroy(xfs_efd_zone);
1757 out_destroy_buf_item_zone:
1758 kmem_zone_destroy(xfs_buf_item_zone);
1759 out_destroy_trans_zone:
1760 kmem_zone_destroy(xfs_trans_zone);
1761 out_destroy_ifork_zone:
1762 kmem_zone_destroy(xfs_ifork_zone);
1763 out_destroy_dabuf_zone:
1764 kmem_zone_destroy(xfs_dabuf_zone);
1765 out_destroy_da_state_zone:
1766 kmem_zone_destroy(xfs_da_state_zone);
1767 out_destroy_btree_cur_zone:
1768 kmem_zone_destroy(xfs_btree_cur_zone);
1769 out_destroy_bmap_free_item_zone:
1770 kmem_zone_destroy(xfs_bmap_free_item_zone);
1771 out_destroy_log_ticket_zone:
1772 kmem_zone_destroy(xfs_log_ticket_zone);
1773 out_destroy_ioend_pool:
1774 mempool_destroy(xfs_ioend_pool);
1775 out_destroy_ioend_zone:
1776 kmem_zone_destroy(xfs_ioend_zone);
1777 out:
1778 return -ENOMEM;
1779 }
1780
1781 STATIC void
1782 xfs_destroy_zones(void)
1783 {
1784 #ifdef CONFIG_XFS_POSIX_ACL
1785 kmem_zone_destroy(xfs_acl_zone);
1786 #endif
1787 kmem_zone_destroy(xfs_ili_zone);
1788 kmem_zone_destroy(xfs_inode_zone);
1789 kmem_zone_destroy(xfs_efi_zone);
1790 kmem_zone_destroy(xfs_efd_zone);
1791 kmem_zone_destroy(xfs_buf_item_zone);
1792 kmem_zone_destroy(xfs_trans_zone);
1793 kmem_zone_destroy(xfs_ifork_zone);
1794 kmem_zone_destroy(xfs_dabuf_zone);
1795 kmem_zone_destroy(xfs_da_state_zone);
1796 kmem_zone_destroy(xfs_btree_cur_zone);
1797 kmem_zone_destroy(xfs_bmap_free_item_zone);
1798 kmem_zone_destroy(xfs_log_ticket_zone);
1799 mempool_destroy(xfs_ioend_pool);
1800 kmem_zone_destroy(xfs_ioend_zone);
1801
1802 }
1803
1804 STATIC int __init
1805 init_xfs_fs(void)
1806 {
1807 int error;
1808
1809 printk(KERN_INFO XFS_VERSION_STRING " with "
1810 XFS_BUILD_OPTIONS " enabled\n");
1811
1812 ktrace_init(64);
1813 xfs_ioend_init();
1814 xfs_dir_startup();
1815
1816 error = xfs_init_zones();
1817 if (error)
1818 goto out;
1819
1820 error = xfs_alloc_trace_bufs();
1821 if (error)
1822 goto out_destroy_zones;
1823
1824 error = xfs_mru_cache_init();
1825 if (error)
1826 goto out_free_trace_buffers;
1827
1828 error = xfs_filestream_init();
1829 if (error)
1830 goto out_mru_cache_uninit;
1831
1832 error = xfs_buf_init();
1833 if (error)
1834 goto out_filestream_uninit;
1835
1836 error = xfs_init_procfs();
1837 if (error)
1838 goto out_buf_terminate;
1839
1840 error = xfs_sysctl_register();
1841 if (error)
1842 goto out_cleanup_procfs;
1843
1844 vfs_initquota();
1845
1846 error = register_filesystem(&xfs_fs_type);
1847 if (error)
1848 goto out_sysctl_unregister;
1849 return 0;
1850
1851 out_sysctl_unregister:
1852 xfs_sysctl_unregister();
1853 out_cleanup_procfs:
1854 xfs_cleanup_procfs();
1855 out_buf_terminate:
1856 xfs_buf_terminate();
1857 out_filestream_uninit:
1858 xfs_filestream_uninit();
1859 out_mru_cache_uninit:
1860 xfs_mru_cache_uninit();
1861 out_free_trace_buffers:
1862 xfs_free_trace_bufs();
1863 out_destroy_zones:
1864 xfs_destroy_zones();
1865 out:
1866 return error;
1867 }
1868
1869 STATIC void __exit
1870 exit_xfs_fs(void)
1871 {
1872 vfs_exitquota();
1873 unregister_filesystem(&xfs_fs_type);
1874 xfs_sysctl_unregister();
1875 xfs_cleanup_procfs();
1876 xfs_buf_terminate();
1877 xfs_filestream_uninit();
1878 xfs_mru_cache_uninit();
1879 xfs_free_trace_bufs();
1880 xfs_destroy_zones();
1881 ktrace_uninit();
1882 }
1883
1884 module_init(init_xfs_fs);
1885 module_exit(exit_xfs_fs);
1886
1887 MODULE_AUTHOR("Silicon Graphics, Inc.");
1888 MODULE_DESCRIPTION(XFS_VERSION_STRING " with " XFS_BUILD_OPTIONS " enabled");
1889 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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