1 /*
2 * Copyright (c) 2000-2006 Silicon Graphics, Inc.
3 * All Rights Reserved.
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
7 * published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it would be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write the Free Software Foundation,
16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
17 */
18
19 #include "xfs.h"
20 #include "xfs_bit.h"
21 #include "xfs_log.h"
22 #include "xfs_inum.h"
23 #include "xfs_trans.h"
24 #include "xfs_sb.h"
25 #include "xfs_ag.h"
26 #include "xfs_dir2.h"
27 #include "xfs_alloc.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_dinode.h"
34 #include "xfs_inode.h"
35 #include "xfs_btree.h"
36 #include "xfs_btree_trace.h"
37 #include "xfs_ialloc.h"
38 #include "xfs_bmap.h"
39 #include "xfs_rtalloc.h"
40 #include "xfs_error.h"
41 #include "xfs_itable.h"
42 #include "xfs_fsops.h"
43 #include "xfs_attr.h"
44 #include "xfs_buf_item.h"
45 #include "xfs_utils.h"
46 #include "xfs_vnodeops.h"
47 #include "xfs_log_priv.h"
48 #include "xfs_trans_priv.h"
49 #include "xfs_filestream.h"
50 #include "xfs_da_btree.h"
51 #include "xfs_extfree_item.h"
52 #include "xfs_mru_cache.h"
53 #include "xfs_inode_item.h"
54 #include "xfs_sync.h"
55 #include "xfs_trace.h"
56
57 #include <linux/namei.h>
58 #include <linux/init.h>
59 #include <linux/slab.h>
60 #include <linux/mount.h>
61 #include <linux/mempool.h>
62 #include <linux/writeback.h>
63 #include <linux/kthread.h>
64 #include <linux/freezer.h>
65 #include <linux/parser.h>
66
67 static const struct super_operations xfs_super_operations;
68 static kmem_zone_t *xfs_ioend_zone;
69 mempool_t *xfs_ioend_pool;
70
71 #define MNTOPT_LOGBUFS "logbufs" /* number of XFS log buffers */
72 #define MNTOPT_LOGBSIZE "logbsize" /* size of XFS log buffers */
73 #define MNTOPT_LOGDEV "logdev" /* log device */
74 #define MNTOPT_RTDEV "rtdev" /* realtime I/O device */
75 #define MNTOPT_BIOSIZE "biosize" /* log2 of preferred buffered io size */
76 #define MNTOPT_WSYNC "wsync" /* safe-mode nfs compatible mount */
77 #define MNTOPT_NOALIGN "noalign" /* turn off stripe alignment */
78 #define MNTOPT_SWALLOC "swalloc" /* turn on stripe width allocation */
79 #define MNTOPT_SUNIT "sunit" /* data volume stripe unit */
80 #define MNTOPT_SWIDTH "swidth" /* data volume stripe width */
81 #define MNTOPT_NOUUID "nouuid" /* ignore filesystem UUID */
82 #define MNTOPT_MTPT "mtpt" /* filesystem mount point */
83 #define MNTOPT_GRPID "grpid" /* group-ID from parent directory */
84 #define MNTOPT_NOGRPID "nogrpid" /* group-ID from current process */
85 #define MNTOPT_BSDGROUPS "bsdgroups" /* group-ID from parent directory */
86 #define MNTOPT_SYSVGROUPS "sysvgroups" /* group-ID from current process */
87 #define MNTOPT_ALLOCSIZE "allocsize" /* preferred allocation size */
88 #define MNTOPT_NORECOVERY "norecovery" /* don't run XFS recovery */
89 #define MNTOPT_BARRIER "barrier" /* use writer barriers for log write and
90 * unwritten extent conversion */
91 #define MNTOPT_NOBARRIER "nobarrier" /* .. disable */
92 #define MNTOPT_64BITINODE "inode64" /* inodes can be allocated anywhere */
93 #define MNTOPT_IKEEP "ikeep" /* do not free empty inode clusters */
94 #define MNTOPT_NOIKEEP "noikeep" /* free empty inode clusters */
95 #define MNTOPT_LARGEIO "largeio" /* report large I/O sizes in stat() */
96 #define MNTOPT_NOLARGEIO "nolargeio" /* do not report large I/O sizes
97 * in stat(). */
98 #define MNTOPT_ATTR2 "attr2" /* do use attr2 attribute format */
99 #define MNTOPT_NOATTR2 "noattr2" /* do not use attr2 attribute format */
100 #define MNTOPT_FILESTREAM "filestreams" /* use filestreams allocator */
101 #define MNTOPT_QUOTA "quota" /* disk quotas (user) */
102 #define MNTOPT_NOQUOTA "noquota" /* no quotas */
103 #define MNTOPT_USRQUOTA "usrquota" /* user quota enabled */
104 #define MNTOPT_GRPQUOTA "grpquota" /* group quota enabled */
105 #define MNTOPT_PRJQUOTA "prjquota" /* project quota enabled */
106 #define MNTOPT_UQUOTA "uquota" /* user quota (IRIX variant) */
107 #define MNTOPT_GQUOTA "gquota" /* group quota (IRIX variant) */
108 #define MNTOPT_PQUOTA "pquota" /* project quota (IRIX variant) */
109 #define MNTOPT_UQUOTANOENF "uqnoenforce"/* user quota limit enforcement */
110 #define MNTOPT_GQUOTANOENF "gqnoenforce"/* group quota limit enforcement */
111 #define MNTOPT_PQUOTANOENF "pqnoenforce"/* project quota limit enforcement */
112 #define MNTOPT_QUOTANOENF "qnoenforce" /* same as uqnoenforce */
113 #define MNTOPT_DELAYLOG "delaylog" /* Delayed loging enabled */
114 #define MNTOPT_NODELAYLOG "nodelaylog" /* Delayed loging disabled */
115
116 /*
117 * Table driven mount option parser.
118 *
119 * Currently only used for remount, but it will be used for mount
120 * in the future, too.
121 */
122 enum {
123 Opt_barrier, Opt_nobarrier, Opt_err
124 };
125
126 static const match_table_t tokens = {
127 {Opt_barrier, "barrier"},
128 {Opt_nobarrier, "nobarrier"},
129 {Opt_err, NULL}
130 };
131
132
133 STATIC unsigned long
suffix_strtoul(char * s,char ** endp,unsigned int base)134 suffix_strtoul(char *s, char **endp, unsigned int base)
135 {
136 int last, shift_left_factor = 0;
137 char *value = s;
138
139 last = strlen(value) - 1;
140 if (value[last] == 'K' || value[last] == 'k') {
141 shift_left_factor = 10;
142 value[last] = '\0';
143 }
144 if (value[last] == 'M' || value[last] == 'm') {
145 shift_left_factor = 20;
146 value[last] = '\0';
147 }
148 if (value[last] == 'G' || value[last] == 'g') {
149 shift_left_factor = 30;
150 value[last] = '\0';
151 }
152
153 return simple_strtoul((const char *)s, endp, base) << shift_left_factor;
154 }
155
156 /*
157 * This function fills in xfs_mount_t fields based on mount args.
158 * Note: the superblock has _not_ yet been read in.
159 *
160 * Note that this function leaks the various device name allocations on
161 * failure. The caller takes care of them.
162 */
163 STATIC int
xfs_parseargs(struct xfs_mount * mp,char * options)164 xfs_parseargs(
165 struct xfs_mount *mp,
166 char *options)
167 {
168 struct super_block *sb = mp->m_super;
169 char *this_char, *value, *eov;
170 int dsunit = 0;
171 int dswidth = 0;
172 int iosize = 0;
173 __uint8_t iosizelog = 0;
174
175 /*
176 * set up the mount name first so all the errors will refer to the
177 * correct device.
178 */
179 mp->m_fsname = kstrndup(sb->s_id, MAXNAMELEN, GFP_KERNEL);
180 if (!mp->m_fsname)
181 return ENOMEM;
182 mp->m_fsname_len = strlen(mp->m_fsname) + 1;
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 mp->m_flags |= XFS_MOUNT_DELAYLOG;
202
203 /*
204 * These can be overridden by the mount option parsing.
205 */
206 mp->m_logbufs = -1;
207 mp->m_logbsize = -1;
208
209 if (!options)
210 goto done;
211
212 while ((this_char = strsep(&options, ",")) != NULL) {
213 if (!*this_char)
214 continue;
215 if ((value = strchr(this_char, '=')) != NULL)
216 *value++ = 0;
217
218 if (!strcmp(this_char, MNTOPT_LOGBUFS)) {
219 if (!value || !*value) {
220 xfs_warn(mp, "%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 xfs_warn(mp, "%s option requires an argument",
228 this_char);
229 return EINVAL;
230 }
231 mp->m_logbsize = suffix_strtoul(value, &eov, 10);
232 } else if (!strcmp(this_char, MNTOPT_LOGDEV)) {
233 if (!value || !*value) {
234 xfs_warn(mp, "%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 xfs_warn(mp, "%s option not allowed on this system",
243 this_char);
244 return EINVAL;
245 } else if (!strcmp(this_char, MNTOPT_RTDEV)) {
246 if (!value || !*value) {
247 xfs_warn(mp, "%s option requires an argument",
248 this_char);
249 return EINVAL;
250 }
251 mp->m_rtname = kstrndup(value, MAXNAMELEN, GFP_KERNEL);
252 if (!mp->m_rtname)
253 return ENOMEM;
254 } else if (!strcmp(this_char, MNTOPT_BIOSIZE)) {
255 if (!value || !*value) {
256 xfs_warn(mp, "%s option requires an argument",
257 this_char);
258 return EINVAL;
259 }
260 iosize = simple_strtoul(value, &eov, 10);
261 iosizelog = ffs(iosize) - 1;
262 } else if (!strcmp(this_char, MNTOPT_ALLOCSIZE)) {
263 if (!value || !*value) {
264 xfs_warn(mp, "%s option requires an argument",
265 this_char);
266 return EINVAL;
267 }
268 iosize = suffix_strtoul(value, &eov, 10);
269 iosizelog = ffs(iosize) - 1;
270 } else if (!strcmp(this_char, MNTOPT_GRPID) ||
271 !strcmp(this_char, MNTOPT_BSDGROUPS)) {
272 mp->m_flags |= XFS_MOUNT_GRPID;
273 } else if (!strcmp(this_char, MNTOPT_NOGRPID) ||
274 !strcmp(this_char, MNTOPT_SYSVGROUPS)) {
275 mp->m_flags &= ~XFS_MOUNT_GRPID;
276 } else if (!strcmp(this_char, MNTOPT_WSYNC)) {
277 mp->m_flags |= XFS_MOUNT_WSYNC;
278 } else if (!strcmp(this_char, MNTOPT_NORECOVERY)) {
279 mp->m_flags |= XFS_MOUNT_NORECOVERY;
280 } else if (!strcmp(this_char, MNTOPT_NOALIGN)) {
281 mp->m_flags |= XFS_MOUNT_NOALIGN;
282 } else if (!strcmp(this_char, MNTOPT_SWALLOC)) {
283 mp->m_flags |= XFS_MOUNT_SWALLOC;
284 } else if (!strcmp(this_char, MNTOPT_SUNIT)) {
285 if (!value || !*value) {
286 xfs_warn(mp, "%s option requires an argument",
287 this_char);
288 return EINVAL;
289 }
290 dsunit = simple_strtoul(value, &eov, 10);
291 } else if (!strcmp(this_char, MNTOPT_SWIDTH)) {
292 if (!value || !*value) {
293 xfs_warn(mp, "%s option requires an argument",
294 this_char);
295 return EINVAL;
296 }
297 dswidth = simple_strtoul(value, &eov, 10);
298 } else if (!strcmp(this_char, MNTOPT_64BITINODE)) {
299 mp->m_flags &= ~XFS_MOUNT_SMALL_INUMS;
300 #if !XFS_BIG_INUMS
301 xfs_warn(mp, "%s option not allowed on this system",
302 this_char);
303 return EINVAL;
304 #endif
305 } else if (!strcmp(this_char, MNTOPT_NOUUID)) {
306 mp->m_flags |= XFS_MOUNT_NOUUID;
307 } else if (!strcmp(this_char, MNTOPT_BARRIER)) {
308 mp->m_flags |= XFS_MOUNT_BARRIER;
309 } else if (!strcmp(this_char, MNTOPT_NOBARRIER)) {
310 mp->m_flags &= ~XFS_MOUNT_BARRIER;
311 } else if (!strcmp(this_char, MNTOPT_IKEEP)) {
312 mp->m_flags |= XFS_MOUNT_IKEEP;
313 } else if (!strcmp(this_char, MNTOPT_NOIKEEP)) {
314 mp->m_flags &= ~XFS_MOUNT_IKEEP;
315 } else if (!strcmp(this_char, MNTOPT_LARGEIO)) {
316 mp->m_flags &= ~XFS_MOUNT_COMPAT_IOSIZE;
317 } else if (!strcmp(this_char, MNTOPT_NOLARGEIO)) {
318 mp->m_flags |= XFS_MOUNT_COMPAT_IOSIZE;
319 } else if (!strcmp(this_char, MNTOPT_ATTR2)) {
320 mp->m_flags |= XFS_MOUNT_ATTR2;
321 } else if (!strcmp(this_char, MNTOPT_NOATTR2)) {
322 mp->m_flags &= ~XFS_MOUNT_ATTR2;
323 mp->m_flags |= XFS_MOUNT_NOATTR2;
324 } else if (!strcmp(this_char, MNTOPT_FILESTREAM)) {
325 mp->m_flags |= XFS_MOUNT_FILESTREAMS;
326 } else if (!strcmp(this_char, MNTOPT_NOQUOTA)) {
327 mp->m_qflags &= ~(XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE |
328 XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE |
329 XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE |
330 XFS_UQUOTA_ENFD | XFS_OQUOTA_ENFD);
331 } else if (!strcmp(this_char, MNTOPT_QUOTA) ||
332 !strcmp(this_char, MNTOPT_UQUOTA) ||
333 !strcmp(this_char, MNTOPT_USRQUOTA)) {
334 mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE |
335 XFS_UQUOTA_ENFD);
336 } else if (!strcmp(this_char, MNTOPT_QUOTANOENF) ||
337 !strcmp(this_char, MNTOPT_UQUOTANOENF)) {
338 mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE);
339 mp->m_qflags &= ~XFS_UQUOTA_ENFD;
340 } else if (!strcmp(this_char, MNTOPT_PQUOTA) ||
341 !strcmp(this_char, MNTOPT_PRJQUOTA)) {
342 mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE |
343 XFS_OQUOTA_ENFD);
344 } else if (!strcmp(this_char, MNTOPT_PQUOTANOENF)) {
345 mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE);
346 mp->m_qflags &= ~XFS_OQUOTA_ENFD;
347 } else if (!strcmp(this_char, MNTOPT_GQUOTA) ||
348 !strcmp(this_char, MNTOPT_GRPQUOTA)) {
349 mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE |
350 XFS_OQUOTA_ENFD);
351 } else if (!strcmp(this_char, MNTOPT_GQUOTANOENF)) {
352 mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE);
353 mp->m_qflags &= ~XFS_OQUOTA_ENFD;
354 } else if (!strcmp(this_char, MNTOPT_DELAYLOG)) {
355 mp->m_flags |= XFS_MOUNT_DELAYLOG;
356 } else if (!strcmp(this_char, MNTOPT_NODELAYLOG)) {
357 mp->m_flags &= ~XFS_MOUNT_DELAYLOG;
358 } else if (!strcmp(this_char, "ihashsize")) {
359 xfs_warn(mp,
360 "ihashsize no longer used, option is deprecated.");
361 } else if (!strcmp(this_char, "osyncisdsync")) {
362 xfs_warn(mp,
363 "osyncisdsync has no effect, option is deprecated.");
364 } else if (!strcmp(this_char, "osyncisosync")) {
365 xfs_warn(mp,
366 "osyncisosync has no effect, option is deprecated.");
367 } else if (!strcmp(this_char, "irixsgid")) {
368 xfs_warn(mp,
369 "irixsgid is now a sysctl(2) variable, option is deprecated.");
370 } else {
371 xfs_warn(mp, "unknown mount option [%s].", this_char);
372 return EINVAL;
373 }
374 }
375
376 /*
377 * no recovery flag requires a read-only mount
378 */
379 if ((mp->m_flags & XFS_MOUNT_NORECOVERY) &&
380 !(mp->m_flags & XFS_MOUNT_RDONLY)) {
381 xfs_warn(mp, "no-recovery mounts must be read-only.");
382 return EINVAL;
383 }
384
385 if ((mp->m_flags & XFS_MOUNT_NOALIGN) && (dsunit || dswidth)) {
386 xfs_warn(mp,
387 "sunit and swidth options incompatible with the noalign option");
388 return EINVAL;
389 }
390
391 #ifndef CONFIG_XFS_QUOTA
392 if (XFS_IS_QUOTA_RUNNING(mp)) {
393 xfs_warn(mp, "quota support not available in this kernel.");
394 return EINVAL;
395 }
396 #endif
397
398 if ((mp->m_qflags & (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE)) &&
399 (mp->m_qflags & (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE))) {
400 xfs_warn(mp, "cannot mount with both project and group quota");
401 return EINVAL;
402 }
403
404 if ((dsunit && !dswidth) || (!dsunit && dswidth)) {
405 xfs_warn(mp, "sunit and swidth must be specified together");
406 return EINVAL;
407 }
408
409 if (dsunit && (dswidth % dsunit != 0)) {
410 xfs_warn(mp,
411 "stripe width (%d) must be a multiple of the stripe unit (%d)",
412 dswidth, dsunit);
413 return EINVAL;
414 }
415
416 done:
417 if (!(mp->m_flags & XFS_MOUNT_NOALIGN)) {
418 /*
419 * At this point the superblock has not been read
420 * in, therefore we do not know the block size.
421 * Before the mount call ends we will convert
422 * these to FSBs.
423 */
424 if (dsunit) {
425 mp->m_dalign = dsunit;
426 mp->m_flags |= XFS_MOUNT_RETERR;
427 }
428
429 if (dswidth)
430 mp->m_swidth = dswidth;
431 }
432
433 if (mp->m_logbufs != -1 &&
434 mp->m_logbufs != 0 &&
435 (mp->m_logbufs < XLOG_MIN_ICLOGS ||
436 mp->m_logbufs > XLOG_MAX_ICLOGS)) {
437 xfs_warn(mp, "invalid logbufs value: %d [not %d-%d]",
438 mp->m_logbufs, XLOG_MIN_ICLOGS, XLOG_MAX_ICLOGS);
439 return XFS_ERROR(EINVAL);
440 }
441 if (mp->m_logbsize != -1 &&
442 mp->m_logbsize != 0 &&
443 (mp->m_logbsize < XLOG_MIN_RECORD_BSIZE ||
444 mp->m_logbsize > XLOG_MAX_RECORD_BSIZE ||
445 !is_power_of_2(mp->m_logbsize))) {
446 xfs_warn(mp,
447 "invalid logbufsize: %d [not 16k,32k,64k,128k or 256k]",
448 mp->m_logbsize);
449 return XFS_ERROR(EINVAL);
450 }
451
452 if (iosizelog) {
453 if (iosizelog > XFS_MAX_IO_LOG ||
454 iosizelog < XFS_MIN_IO_LOG) {
455 xfs_warn(mp, "invalid log iosize: %d [not %d-%d]",
456 iosizelog, XFS_MIN_IO_LOG,
457 XFS_MAX_IO_LOG);
458 return XFS_ERROR(EINVAL);
459 }
460
461 mp->m_flags |= XFS_MOUNT_DFLT_IOSIZE;
462 mp->m_readio_log = iosizelog;
463 mp->m_writeio_log = iosizelog;
464 }
465
466 return 0;
467 }
468
469 struct proc_xfs_info {
470 int flag;
471 char *str;
472 };
473
474 STATIC int
xfs_showargs(struct xfs_mount * mp,struct seq_file * m)475 xfs_showargs(
476 struct xfs_mount *mp,
477 struct seq_file *m)
478 {
479 static struct proc_xfs_info xfs_info_set[] = {
480 /* the few simple ones we can get from the mount struct */
481 { XFS_MOUNT_IKEEP, "," MNTOPT_IKEEP },
482 { XFS_MOUNT_WSYNC, "," MNTOPT_WSYNC },
483 { XFS_MOUNT_NOALIGN, "," MNTOPT_NOALIGN },
484 { XFS_MOUNT_SWALLOC, "," MNTOPT_SWALLOC },
485 { XFS_MOUNT_NOUUID, "," MNTOPT_NOUUID },
486 { XFS_MOUNT_NORECOVERY, "," MNTOPT_NORECOVERY },
487 { XFS_MOUNT_ATTR2, "," MNTOPT_ATTR2 },
488 { XFS_MOUNT_FILESTREAMS, "," MNTOPT_FILESTREAM },
489 { XFS_MOUNT_GRPID, "," MNTOPT_GRPID },
490 { XFS_MOUNT_DELAYLOG, "," MNTOPT_DELAYLOG },
491 { 0, NULL }
492 };
493 static struct proc_xfs_info xfs_info_unset[] = {
494 /* the few simple ones we can get from the mount struct */
495 { XFS_MOUNT_COMPAT_IOSIZE, "," MNTOPT_LARGEIO },
496 { XFS_MOUNT_BARRIER, "," MNTOPT_NOBARRIER },
497 { XFS_MOUNT_SMALL_INUMS, "," MNTOPT_64BITINODE },
498 { 0, NULL }
499 };
500 struct proc_xfs_info *xfs_infop;
501
502 for (xfs_infop = xfs_info_set; xfs_infop->flag; xfs_infop++) {
503 if (mp->m_flags & xfs_infop->flag)
504 seq_puts(m, xfs_infop->str);
505 }
506 for (xfs_infop = xfs_info_unset; xfs_infop->flag; xfs_infop++) {
507 if (!(mp->m_flags & xfs_infop->flag))
508 seq_puts(m, xfs_infop->str);
509 }
510
511 if (mp->m_flags & XFS_MOUNT_DFLT_IOSIZE)
512 seq_printf(m, "," MNTOPT_ALLOCSIZE "=%dk",
513 (int)(1 << mp->m_writeio_log) >> 10);
514
515 if (mp->m_logbufs > 0)
516 seq_printf(m, "," MNTOPT_LOGBUFS "=%d", mp->m_logbufs);
517 if (mp->m_logbsize > 0)
518 seq_printf(m, "," MNTOPT_LOGBSIZE "=%dk", mp->m_logbsize >> 10);
519
520 if (mp->m_logname)
521 seq_printf(m, "," MNTOPT_LOGDEV "=%s", mp->m_logname);
522 if (mp->m_rtname)
523 seq_printf(m, "," MNTOPT_RTDEV "=%s", mp->m_rtname);
524
525 if (mp->m_dalign > 0)
526 seq_printf(m, "," MNTOPT_SUNIT "=%d",
527 (int)XFS_FSB_TO_BB(mp, mp->m_dalign));
528 if (mp->m_swidth > 0)
529 seq_printf(m, "," MNTOPT_SWIDTH "=%d",
530 (int)XFS_FSB_TO_BB(mp, mp->m_swidth));
531
532 if (mp->m_qflags & (XFS_UQUOTA_ACCT|XFS_UQUOTA_ENFD))
533 seq_puts(m, "," MNTOPT_USRQUOTA);
534 else if (mp->m_qflags & XFS_UQUOTA_ACCT)
535 seq_puts(m, "," MNTOPT_UQUOTANOENF);
536
537 /* Either project or group quotas can be active, not both */
538
539 if (mp->m_qflags & XFS_PQUOTA_ACCT) {
540 if (mp->m_qflags & XFS_OQUOTA_ENFD)
541 seq_puts(m, "," MNTOPT_PRJQUOTA);
542 else
543 seq_puts(m, "," MNTOPT_PQUOTANOENF);
544 } else if (mp->m_qflags & XFS_GQUOTA_ACCT) {
545 if (mp->m_qflags & XFS_OQUOTA_ENFD)
546 seq_puts(m, "," MNTOPT_GRPQUOTA);
547 else
548 seq_puts(m, "," MNTOPT_GQUOTANOENF);
549 }
550
551 if (!(mp->m_qflags & XFS_ALL_QUOTA_ACCT))
552 seq_puts(m, "," MNTOPT_NOQUOTA);
553
554 return 0;
555 }
556 __uint64_t
xfs_max_file_offset(unsigned int blockshift)557 xfs_max_file_offset(
558 unsigned int blockshift)
559 {
560 unsigned int pagefactor = 1;
561 unsigned int bitshift = BITS_PER_LONG - 1;
562
563 /* Figure out maximum filesize, on Linux this can depend on
564 * the filesystem blocksize (on 32 bit platforms).
565 * __block_write_begin does this in an [unsigned] long...
566 * page->index << (PAGE_CACHE_SHIFT - bbits)
567 * So, for page sized blocks (4K on 32 bit platforms),
568 * this wraps at around 8Tb (hence MAX_LFS_FILESIZE which is
569 * (((u64)PAGE_CACHE_SIZE << (BITS_PER_LONG-1))-1)
570 * but for smaller blocksizes it is less (bbits = log2 bsize).
571 * Note1: get_block_t takes a long (implicit cast from above)
572 * Note2: The Large Block Device (LBD and HAVE_SECTOR_T) patch
573 * can optionally convert the [unsigned] long from above into
574 * an [unsigned] long long.
575 */
576
577 #if BITS_PER_LONG == 32
578 # if defined(CONFIG_LBDAF)
579 ASSERT(sizeof(sector_t) == 8);
580 pagefactor = PAGE_CACHE_SIZE;
581 bitshift = BITS_PER_LONG;
582 # else
583 pagefactor = PAGE_CACHE_SIZE >> (PAGE_CACHE_SHIFT - blockshift);
584 # endif
585 #endif
586
587 return (((__uint64_t)pagefactor) << bitshift) - 1;
588 }
589
590 STATIC int
xfs_blkdev_get(xfs_mount_t * mp,const char * name,struct block_device ** bdevp)591 xfs_blkdev_get(
592 xfs_mount_t *mp,
593 const char *name,
594 struct block_device **bdevp)
595 {
596 int error = 0;
597
598 *bdevp = blkdev_get_by_path(name, FMODE_READ|FMODE_WRITE|FMODE_EXCL,
599 mp);
600 if (IS_ERR(*bdevp)) {
601 error = PTR_ERR(*bdevp);
602 xfs_warn(mp, "Invalid device [%s], error=%d\n", name, error);
603 }
604
605 return -error;
606 }
607
608 STATIC void
xfs_blkdev_put(struct block_device * bdev)609 xfs_blkdev_put(
610 struct block_device *bdev)
611 {
612 if (bdev)
613 blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL);
614 }
615
616 /*
617 * Try to write out the superblock using barriers.
618 */
619 STATIC int
xfs_barrier_test(xfs_mount_t * mp)620 xfs_barrier_test(
621 xfs_mount_t *mp)
622 {
623 xfs_buf_t *sbp = xfs_getsb(mp, 0);
624 int error;
625
626 XFS_BUF_UNDONE(sbp);
627 XFS_BUF_UNREAD(sbp);
628 XFS_BUF_UNDELAYWRITE(sbp);
629 XFS_BUF_WRITE(sbp);
630 XFS_BUF_UNASYNC(sbp);
631 XFS_BUF_ORDERED(sbp);
632
633 xfsbdstrat(mp, sbp);
634 error = xfs_buf_iowait(sbp);
635
636 /*
637 * Clear all the flags we set and possible error state in the
638 * buffer. We only did the write to try out whether barriers
639 * worked and shouldn't leave any traces in the superblock
640 * buffer.
641 */
642 XFS_BUF_DONE(sbp);
643 XFS_BUF_ERROR(sbp, 0);
644 XFS_BUF_UNORDERED(sbp);
645
646 xfs_buf_relse(sbp);
647 return error;
648 }
649
650 STATIC void
xfs_mountfs_check_barriers(xfs_mount_t * mp)651 xfs_mountfs_check_barriers(xfs_mount_t *mp)
652 {
653 int error;
654
655 if (mp->m_logdev_targp != mp->m_ddev_targp) {
656 xfs_notice(mp,
657 "Disabling barriers, not supported with external log device");
658 mp->m_flags &= ~XFS_MOUNT_BARRIER;
659 return;
660 }
661
662 if (xfs_readonly_buftarg(mp->m_ddev_targp)) {
663 xfs_notice(mp,
664 "Disabling barriers, underlying device is readonly");
665 mp->m_flags &= ~XFS_MOUNT_BARRIER;
666 return;
667 }
668
669 error = xfs_barrier_test(mp);
670 if (error) {
671 xfs_notice(mp,
672 "Disabling barriers, trial barrier write failed");
673 mp->m_flags &= ~XFS_MOUNT_BARRIER;
674 return;
675 }
676 }
677
678 void
xfs_blkdev_issue_flush(xfs_buftarg_t * buftarg)679 xfs_blkdev_issue_flush(
680 xfs_buftarg_t *buftarg)
681 {
682 blkdev_issue_flush(buftarg->bt_bdev, GFP_KERNEL, NULL);
683 }
684
685 STATIC void
xfs_close_devices(struct xfs_mount * mp)686 xfs_close_devices(
687 struct xfs_mount *mp)
688 {
689 if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp) {
690 struct block_device *logdev = mp->m_logdev_targp->bt_bdev;
691 xfs_free_buftarg(mp, mp->m_logdev_targp);
692 xfs_blkdev_put(logdev);
693 }
694 if (mp->m_rtdev_targp) {
695 struct block_device *rtdev = mp->m_rtdev_targp->bt_bdev;
696 xfs_free_buftarg(mp, mp->m_rtdev_targp);
697 xfs_blkdev_put(rtdev);
698 }
699 xfs_free_buftarg(mp, mp->m_ddev_targp);
700 }
701
702 /*
703 * The file system configurations are:
704 * (1) device (partition) with data and internal log
705 * (2) logical volume with data and log subvolumes.
706 * (3) logical volume with data, log, and realtime subvolumes.
707 *
708 * We only have to handle opening the log and realtime volumes here if
709 * they are present. The data subvolume has already been opened by
710 * get_sb_bdev() and is stored in sb->s_bdev.
711 */
712 STATIC int
xfs_open_devices(struct xfs_mount * mp)713 xfs_open_devices(
714 struct xfs_mount *mp)
715 {
716 struct block_device *ddev = mp->m_super->s_bdev;
717 struct block_device *logdev = NULL, *rtdev = NULL;
718 int error;
719
720 /*
721 * Open real time and log devices - order is important.
722 */
723 if (mp->m_logname) {
724 error = xfs_blkdev_get(mp, mp->m_logname, &logdev);
725 if (error)
726 goto out;
727 }
728
729 if (mp->m_rtname) {
730 error = xfs_blkdev_get(mp, mp->m_rtname, &rtdev);
731 if (error)
732 goto out_close_logdev;
733
734 if (rtdev == ddev || rtdev == logdev) {
735 xfs_warn(mp,
736 "Cannot mount filesystem with identical rtdev and ddev/logdev.");
737 error = EINVAL;
738 goto out_close_rtdev;
739 }
740 }
741
742 /*
743 * Setup xfs_mount buffer target pointers
744 */
745 error = ENOMEM;
746 mp->m_ddev_targp = xfs_alloc_buftarg(mp, ddev, 0, mp->m_fsname);
747 if (!mp->m_ddev_targp)
748 goto out_close_rtdev;
749
750 if (rtdev) {
751 mp->m_rtdev_targp = xfs_alloc_buftarg(mp, rtdev, 1,
752 mp->m_fsname);
753 if (!mp->m_rtdev_targp)
754 goto out_free_ddev_targ;
755 }
756
757 if (logdev && logdev != ddev) {
758 mp->m_logdev_targp = xfs_alloc_buftarg(mp, logdev, 1,
759 mp->m_fsname);
760 if (!mp->m_logdev_targp)
761 goto out_free_rtdev_targ;
762 } else {
763 mp->m_logdev_targp = mp->m_ddev_targp;
764 }
765
766 return 0;
767
768 out_free_rtdev_targ:
769 if (mp->m_rtdev_targp)
770 xfs_free_buftarg(mp, mp->m_rtdev_targp);
771 out_free_ddev_targ:
772 xfs_free_buftarg(mp, mp->m_ddev_targp);
773 out_close_rtdev:
774 if (rtdev)
775 xfs_blkdev_put(rtdev);
776 out_close_logdev:
777 if (logdev && logdev != ddev)
778 xfs_blkdev_put(logdev);
779 out:
780 return error;
781 }
782
783 /*
784 * Setup xfs_mount buffer target pointers based on superblock
785 */
786 STATIC int
xfs_setup_devices(struct xfs_mount * mp)787 xfs_setup_devices(
788 struct xfs_mount *mp)
789 {
790 int error;
791
792 error = xfs_setsize_buftarg(mp->m_ddev_targp, mp->m_sb.sb_blocksize,
793 mp->m_sb.sb_sectsize);
794 if (error)
795 return error;
796
797 if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp) {
798 unsigned int log_sector_size = BBSIZE;
799
800 if (xfs_sb_version_hassector(&mp->m_sb))
801 log_sector_size = mp->m_sb.sb_logsectsize;
802 error = xfs_setsize_buftarg(mp->m_logdev_targp,
803 mp->m_sb.sb_blocksize,
804 log_sector_size);
805 if (error)
806 return error;
807 }
808 if (mp->m_rtdev_targp) {
809 error = xfs_setsize_buftarg(mp->m_rtdev_targp,
810 mp->m_sb.sb_blocksize,
811 mp->m_sb.sb_sectsize);
812 if (error)
813 return error;
814 }
815
816 return 0;
817 }
818
819 /* Catch misguided souls that try to use this interface on XFS */
820 STATIC struct inode *
xfs_fs_alloc_inode(struct super_block * sb)821 xfs_fs_alloc_inode(
822 struct super_block *sb)
823 {
824 BUG();
825 return NULL;
826 }
827
828 /*
829 * Now that the generic code is guaranteed not to be accessing
830 * the linux inode, we can reclaim the inode.
831 */
832 STATIC void
xfs_fs_destroy_inode(struct inode * inode)833 xfs_fs_destroy_inode(
834 struct inode *inode)
835 {
836 struct xfs_inode *ip = XFS_I(inode);
837
838 trace_xfs_destroy_inode(ip);
839
840 XFS_STATS_INC(vn_reclaim);
841
842 /* bad inode, get out here ASAP */
843 if (is_bad_inode(inode))
844 goto out_reclaim;
845
846 xfs_ioend_wait(ip);
847
848 ASSERT(XFS_FORCED_SHUTDOWN(ip->i_mount) || ip->i_delayed_blks == 0);
849
850 /*
851 * We should never get here with one of the reclaim flags already set.
852 */
853 ASSERT_ALWAYS(!xfs_iflags_test(ip, XFS_IRECLAIMABLE));
854 ASSERT_ALWAYS(!xfs_iflags_test(ip, XFS_IRECLAIM));
855
856 /*
857 * We always use background reclaim here because even if the
858 * inode is clean, it still may be under IO and hence we have
859 * to take the flush lock. The background reclaim path handles
860 * this more efficiently than we can here, so simply let background
861 * reclaim tear down all inodes.
862 */
863 out_reclaim:
864 xfs_inode_set_reclaim_tag(ip);
865 }
866
867 /*
868 * Slab object creation initialisation for the XFS inode.
869 * This covers only the idempotent fields in the XFS inode;
870 * all other fields need to be initialised on allocation
871 * from the slab. This avoids the need to repeatedly initialise
872 * fields in the xfs inode that left in the initialise state
873 * when freeing the inode.
874 */
875 STATIC void
xfs_fs_inode_init_once(void * inode)876 xfs_fs_inode_init_once(
877 void *inode)
878 {
879 struct xfs_inode *ip = inode;
880
881 memset(ip, 0, sizeof(struct xfs_inode));
882
883 /* vfs inode */
884 inode_init_once(VFS_I(ip));
885
886 /* xfs inode */
887 atomic_set(&ip->i_iocount, 0);
888 atomic_set(&ip->i_pincount, 0);
889 spin_lock_init(&ip->i_flags_lock);
890 init_waitqueue_head(&ip->i_ipin_wait);
891 /*
892 * Because we want to use a counting completion, complete
893 * the flush completion once to allow a single access to
894 * the flush completion without blocking.
895 */
896 init_completion(&ip->i_flush);
897 complete(&ip->i_flush);
898
899 mrlock_init(&ip->i_lock, MRLOCK_ALLOW_EQUAL_PRI|MRLOCK_BARRIER,
900 "xfsino", ip->i_ino);
901 }
902
903 /*
904 * Dirty the XFS inode when mark_inode_dirty_sync() is called so that
905 * we catch unlogged VFS level updates to the inode.
906 *
907 * We need the barrier() to maintain correct ordering between unlogged
908 * updates and the transaction commit code that clears the i_update_core
909 * field. This requires all updates to be completed before marking the
910 * inode dirty.
911 */
912 STATIC void
xfs_fs_dirty_inode(struct inode * inode)913 xfs_fs_dirty_inode(
914 struct inode *inode)
915 {
916 barrier();
917 XFS_I(inode)->i_update_core = 1;
918 }
919
920 STATIC int
xfs_log_inode(struct xfs_inode * ip)921 xfs_log_inode(
922 struct xfs_inode *ip)
923 {
924 struct xfs_mount *mp = ip->i_mount;
925 struct xfs_trans *tp;
926 int error;
927
928 xfs_iunlock(ip, XFS_ILOCK_SHARED);
929 tp = xfs_trans_alloc(mp, XFS_TRANS_FSYNC_TS);
930 error = xfs_trans_reserve(tp, 0, XFS_FSYNC_TS_LOG_RES(mp), 0, 0, 0);
931
932 if (error) {
933 xfs_trans_cancel(tp, 0);
934 /* we need to return with the lock hold shared */
935 xfs_ilock(ip, XFS_ILOCK_SHARED);
936 return error;
937 }
938
939 xfs_ilock(ip, XFS_ILOCK_EXCL);
940
941 /*
942 * Note - it's possible that we might have pushed ourselves out of the
943 * way during trans_reserve which would flush the inode. But there's
944 * no guarantee that the inode buffer has actually gone out yet (it's
945 * delwri). Plus the buffer could be pinned anyway if it's part of
946 * an inode in another recent transaction. So we play it safe and
947 * fire off the transaction anyway.
948 */
949 xfs_trans_ijoin(tp, ip);
950 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
951 error = xfs_trans_commit(tp, 0);
952 xfs_ilock_demote(ip, XFS_ILOCK_EXCL);
953
954 return error;
955 }
956
957 STATIC int
xfs_fs_write_inode(struct inode * inode,struct writeback_control * wbc)958 xfs_fs_write_inode(
959 struct inode *inode,
960 struct writeback_control *wbc)
961 {
962 struct xfs_inode *ip = XFS_I(inode);
963 struct xfs_mount *mp = ip->i_mount;
964 int error = EAGAIN;
965
966 trace_xfs_write_inode(ip);
967
968 if (XFS_FORCED_SHUTDOWN(mp))
969 return XFS_ERROR(EIO);
970
971 if (wbc->sync_mode == WB_SYNC_ALL) {
972 /*
973 * Make sure the inode has made it it into the log. Instead
974 * of forcing it all the way to stable storage using a
975 * synchronous transaction we let the log force inside the
976 * ->sync_fs call do that for thus, which reduces the number
977 * of synchronous log foces dramatically.
978 */
979 xfs_ioend_wait(ip);
980 xfs_ilock(ip, XFS_ILOCK_SHARED);
981 if (ip->i_update_core) {
982 error = xfs_log_inode(ip);
983 if (error)
984 goto out_unlock;
985 }
986 } else {
987 /*
988 * We make this non-blocking if the inode is contended, return
989 * EAGAIN to indicate to the caller that they did not succeed.
990 * This prevents the flush path from blocking on inodes inside
991 * another operation right now, they get caught later by
992 * xfs_sync.
993 */
994 if (!xfs_ilock_nowait(ip, XFS_ILOCK_SHARED))
995 goto out;
996
997 if (xfs_ipincount(ip) || !xfs_iflock_nowait(ip))
998 goto out_unlock;
999
1000 /*
1001 * Now we have the flush lock and the inode is not pinned, we
1002 * can check if the inode is really clean as we know that
1003 * there are no pending transaction completions, it is not
1004 * waiting on the delayed write queue and there is no IO in
1005 * progress.
1006 */
1007 if (xfs_inode_clean(ip)) {
1008 xfs_ifunlock(ip);
1009 error = 0;
1010 goto out_unlock;
1011 }
1012 error = xfs_iflush(ip, SYNC_TRYLOCK);
1013 }
1014
1015 out_unlock:
1016 xfs_iunlock(ip, XFS_ILOCK_SHARED);
1017 out:
1018 /*
1019 * if we failed to write out the inode then mark
1020 * it dirty again so we'll try again later.
1021 */
1022 if (error)
1023 xfs_mark_inode_dirty_sync(ip);
1024 return -error;
1025 }
1026
1027 STATIC void
xfs_fs_evict_inode(struct inode * inode)1028 xfs_fs_evict_inode(
1029 struct inode *inode)
1030 {
1031 xfs_inode_t *ip = XFS_I(inode);
1032
1033 trace_xfs_evict_inode(ip);
1034
1035 truncate_inode_pages(&inode->i_data, 0);
1036 end_writeback(inode);
1037 XFS_STATS_INC(vn_rele);
1038 XFS_STATS_INC(vn_remove);
1039 XFS_STATS_DEC(vn_active);
1040
1041 /*
1042 * The iolock is used by the file system to coordinate reads,
1043 * writes, and block truncates. Up to this point the lock
1044 * protected concurrent accesses by users of the inode. But
1045 * from here forward we're doing some final processing of the
1046 * inode because we're done with it, and although we reuse the
1047 * iolock for protection it is really a distinct lock class
1048 * (in the lockdep sense) from before. To keep lockdep happy
1049 * (and basically indicate what we are doing), we explicitly
1050 * re-init the iolock here.
1051 */
1052 ASSERT(!rwsem_is_locked(&ip->i_iolock.mr_lock));
1053 mrlock_init(&ip->i_iolock, MRLOCK_BARRIER, "xfsio", ip->i_ino);
1054 lockdep_set_class_and_name(&ip->i_iolock.mr_lock,
1055 &xfs_iolock_reclaimable, "xfs_iolock_reclaimable");
1056
1057 xfs_inactive(ip);
1058 }
1059
1060 STATIC void
xfs_free_fsname(struct xfs_mount * mp)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
xfs_fs_put_super(struct super_block * sb)1070 xfs_fs_put_super(
1071 struct super_block *sb)
1072 {
1073 struct xfs_mount *mp = XFS_M(sb);
1074
1075 /*
1076 * Unregister the memory shrinker before we tear down the mount
1077 * structure so we don't have memory reclaim racing with us here.
1078 */
1079 xfs_inode_shrinker_unregister(mp);
1080 xfs_syncd_stop(mp);
1081
1082 /*
1083 * Blow away any referenced inode in the filestreams cache.
1084 * This can and will cause log traffic as inodes go inactive
1085 * here.
1086 */
1087 xfs_filestream_unmount(mp);
1088
1089 XFS_bflush(mp->m_ddev_targp);
1090
1091 xfs_unmountfs(mp);
1092 xfs_freesb(mp);
1093 xfs_icsb_destroy_counters(mp);
1094 xfs_close_devices(mp);
1095 xfs_free_fsname(mp);
1096 kfree(mp);
1097 }
1098
1099 STATIC int
xfs_fs_sync_fs(struct super_block * sb,int wait)1100 xfs_fs_sync_fs(
1101 struct super_block *sb,
1102 int wait)
1103 {
1104 struct xfs_mount *mp = XFS_M(sb);
1105 int error;
1106
1107 /*
1108 * Not much we can do for the first async pass. Writing out the
1109 * superblock would be counter-productive as we are going to redirty
1110 * when writing out other data and metadata (and writing out a single
1111 * block is quite fast anyway).
1112 *
1113 * Try to asynchronously kick off quota syncing at least.
1114 */
1115 if (!wait) {
1116 xfs_qm_sync(mp, SYNC_TRYLOCK);
1117 return 0;
1118 }
1119
1120 error = xfs_quiesce_data(mp);
1121 if (error)
1122 return -error;
1123
1124 if (laptop_mode) {
1125 /*
1126 * The disk must be active because we're syncing.
1127 * We schedule xfssyncd now (now that the disk is
1128 * active) instead of later (when it might not be).
1129 */
1130 flush_delayed_work_sync(&mp->m_sync_work);
1131 }
1132
1133 return 0;
1134 }
1135
1136 STATIC int
xfs_fs_statfs(struct dentry * dentry,struct kstatfs * statp)1137 xfs_fs_statfs(
1138 struct dentry *dentry,
1139 struct kstatfs *statp)
1140 {
1141 struct xfs_mount *mp = XFS_M(dentry->d_sb);
1142 xfs_sb_t *sbp = &mp->m_sb;
1143 struct xfs_inode *ip = XFS_I(dentry->d_inode);
1144 __uint64_t fakeinos, id;
1145 xfs_extlen_t lsize;
1146 __int64_t ffree;
1147
1148 statp->f_type = XFS_SB_MAGIC;
1149 statp->f_namelen = MAXNAMELEN - 1;
1150
1151 id = huge_encode_dev(mp->m_ddev_targp->bt_dev);
1152 statp->f_fsid.val[0] = (u32)id;
1153 statp->f_fsid.val[1] = (u32)(id >> 32);
1154
1155 xfs_icsb_sync_counters(mp, XFS_ICSB_LAZY_COUNT);
1156
1157 spin_lock(&mp->m_sb_lock);
1158 statp->f_bsize = sbp->sb_blocksize;
1159 lsize = sbp->sb_logstart ? sbp->sb_logblocks : 0;
1160 statp->f_blocks = sbp->sb_dblocks - lsize;
1161 statp->f_bfree = statp->f_bavail =
1162 sbp->sb_fdblocks - XFS_ALLOC_SET_ASIDE(mp);
1163 fakeinos = statp->f_bfree << sbp->sb_inopblog;
1164 statp->f_files =
1165 MIN(sbp->sb_icount + fakeinos, (__uint64_t)XFS_MAXINUMBER);
1166 if (mp->m_maxicount)
1167 statp->f_files = min_t(typeof(statp->f_files),
1168 statp->f_files,
1169 mp->m_maxicount);
1170
1171 /* make sure statp->f_ffree does not underflow */
1172 ffree = statp->f_files - (sbp->sb_icount - sbp->sb_ifree);
1173 statp->f_ffree = max_t(__int64_t, ffree, 0);
1174
1175 spin_unlock(&mp->m_sb_lock);
1176
1177 if ((ip->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) ||
1178 ((mp->m_qflags & (XFS_PQUOTA_ACCT|XFS_OQUOTA_ENFD))) ==
1179 (XFS_PQUOTA_ACCT|XFS_OQUOTA_ENFD))
1180 xfs_qm_statvfs(ip, statp);
1181 return 0;
1182 }
1183
1184 STATIC void
xfs_save_resvblks(struct xfs_mount * mp)1185 xfs_save_resvblks(struct xfs_mount *mp)
1186 {
1187 __uint64_t resblks = 0;
1188
1189 mp->m_resblks_save = mp->m_resblks;
1190 xfs_reserve_blocks(mp, &resblks, NULL);
1191 }
1192
1193 STATIC void
xfs_restore_resvblks(struct xfs_mount * mp)1194 xfs_restore_resvblks(struct xfs_mount *mp)
1195 {
1196 __uint64_t resblks;
1197
1198 if (mp->m_resblks_save) {
1199 resblks = mp->m_resblks_save;
1200 mp->m_resblks_save = 0;
1201 } else
1202 resblks = xfs_default_resblks(mp);
1203
1204 xfs_reserve_blocks(mp, &resblks, NULL);
1205 }
1206
1207 STATIC int
xfs_fs_remount(struct super_block * sb,int * flags,char * options)1208 xfs_fs_remount(
1209 struct super_block *sb,
1210 int *flags,
1211 char *options)
1212 {
1213 struct xfs_mount *mp = XFS_M(sb);
1214 substring_t args[MAX_OPT_ARGS];
1215 char *p;
1216 int error;
1217
1218 while ((p = strsep(&options, ",")) != NULL) {
1219 int token;
1220
1221 if (!*p)
1222 continue;
1223
1224 token = match_token(p, tokens, args);
1225 switch (token) {
1226 case Opt_barrier:
1227 mp->m_flags |= XFS_MOUNT_BARRIER;
1228
1229 /*
1230 * Test if barriers are actually working if we can,
1231 * else delay this check until the filesystem is
1232 * marked writeable.
1233 */
1234 if (!(mp->m_flags & XFS_MOUNT_RDONLY))
1235 xfs_mountfs_check_barriers(mp);
1236 break;
1237 case Opt_nobarrier:
1238 mp->m_flags &= ~XFS_MOUNT_BARRIER;
1239 break;
1240 default:
1241 /*
1242 * Logically we would return an error here to prevent
1243 * users from believing they might have changed
1244 * mount options using remount which can't be changed.
1245 *
1246 * But unfortunately mount(8) adds all options from
1247 * mtab and fstab to the mount arguments in some cases
1248 * so we can't blindly reject options, but have to
1249 * check for each specified option if it actually
1250 * differs from the currently set option and only
1251 * reject it if that's the case.
1252 *
1253 * Until that is implemented we return success for
1254 * every remount request, and silently ignore all
1255 * options that we can't actually change.
1256 */
1257 #if 0
1258 xfs_info(mp,
1259 "mount option \"%s\" not supported for remount\n", p);
1260 return -EINVAL;
1261 #else
1262 break;
1263 #endif
1264 }
1265 }
1266
1267 /* ro -> rw */
1268 if ((mp->m_flags & XFS_MOUNT_RDONLY) && !(*flags & MS_RDONLY)) {
1269 mp->m_flags &= ~XFS_MOUNT_RDONLY;
1270 if (mp->m_flags & XFS_MOUNT_BARRIER)
1271 xfs_mountfs_check_barriers(mp);
1272
1273 /*
1274 * If this is the first remount to writeable state we
1275 * might have some superblock changes to update.
1276 */
1277 if (mp->m_update_flags) {
1278 error = xfs_mount_log_sb(mp, mp->m_update_flags);
1279 if (error) {
1280 xfs_warn(mp, "failed to write sb changes");
1281 return error;
1282 }
1283 mp->m_update_flags = 0;
1284 }
1285
1286 /*
1287 * Fill out the reserve pool if it is empty. Use the stashed
1288 * value if it is non-zero, otherwise go with the default.
1289 */
1290 xfs_restore_resvblks(mp);
1291 }
1292
1293 /* rw -> ro */
1294 if (!(mp->m_flags & XFS_MOUNT_RDONLY) && (*flags & MS_RDONLY)) {
1295 /*
1296 * After we have synced the data but before we sync the
1297 * metadata, we need to free up the reserve block pool so that
1298 * the used block count in the superblock on disk is correct at
1299 * the end of the remount. Stash the current reserve pool size
1300 * so that if we get remounted rw, we can return it to the same
1301 * size.
1302 */
1303
1304 xfs_quiesce_data(mp);
1305 xfs_save_resvblks(mp);
1306 xfs_quiesce_attr(mp);
1307 mp->m_flags |= XFS_MOUNT_RDONLY;
1308 }
1309
1310 return 0;
1311 }
1312
1313 /*
1314 * Second stage of a freeze. The data is already frozen so we only
1315 * need to take care of the metadata. Once that's done write a dummy
1316 * record to dirty the log in case of a crash while frozen.
1317 */
1318 STATIC int
xfs_fs_freeze(struct super_block * sb)1319 xfs_fs_freeze(
1320 struct super_block *sb)
1321 {
1322 struct xfs_mount *mp = XFS_M(sb);
1323
1324 xfs_save_resvblks(mp);
1325 xfs_quiesce_attr(mp);
1326 return -xfs_fs_log_dummy(mp);
1327 }
1328
1329 STATIC int
xfs_fs_unfreeze(struct super_block * sb)1330 xfs_fs_unfreeze(
1331 struct super_block *sb)
1332 {
1333 struct xfs_mount *mp = XFS_M(sb);
1334
1335 xfs_restore_resvblks(mp);
1336 return 0;
1337 }
1338
1339 STATIC int
xfs_fs_show_options(struct seq_file * m,struct vfsmount * mnt)1340 xfs_fs_show_options(
1341 struct seq_file *m,
1342 struct vfsmount *mnt)
1343 {
1344 return -xfs_showargs(XFS_M(mnt->mnt_sb), m);
1345 }
1346
1347 /*
1348 * This function fills in xfs_mount_t fields based on mount args.
1349 * Note: the superblock _has_ now been read in.
1350 */
1351 STATIC int
xfs_finish_flags(struct xfs_mount * mp)1352 xfs_finish_flags(
1353 struct xfs_mount *mp)
1354 {
1355 int ronly = (mp->m_flags & XFS_MOUNT_RDONLY);
1356
1357 /* Fail a mount where the logbuf is smaller than the log stripe */
1358 if (xfs_sb_version_haslogv2(&mp->m_sb)) {
1359 if (mp->m_logbsize <= 0 &&
1360 mp->m_sb.sb_logsunit > XLOG_BIG_RECORD_BSIZE) {
1361 mp->m_logbsize = mp->m_sb.sb_logsunit;
1362 } else if (mp->m_logbsize > 0 &&
1363 mp->m_logbsize < mp->m_sb.sb_logsunit) {
1364 xfs_warn(mp,
1365 "logbuf size must be greater than or equal to log stripe size");
1366 return XFS_ERROR(EINVAL);
1367 }
1368 } else {
1369 /* Fail a mount if the logbuf is larger than 32K */
1370 if (mp->m_logbsize > XLOG_BIG_RECORD_BSIZE) {
1371 xfs_warn(mp,
1372 "logbuf size for version 1 logs must be 16K or 32K");
1373 return XFS_ERROR(EINVAL);
1374 }
1375 }
1376
1377 /*
1378 * mkfs'ed attr2 will turn on attr2 mount unless explicitly
1379 * told by noattr2 to turn it off
1380 */
1381 if (xfs_sb_version_hasattr2(&mp->m_sb) &&
1382 !(mp->m_flags & XFS_MOUNT_NOATTR2))
1383 mp->m_flags |= XFS_MOUNT_ATTR2;
1384
1385 /*
1386 * prohibit r/w mounts of read-only filesystems
1387 */
1388 if ((mp->m_sb.sb_flags & XFS_SBF_READONLY) && !ronly) {
1389 xfs_warn(mp,
1390 "cannot mount a read-only filesystem as read-write");
1391 return XFS_ERROR(EROFS);
1392 }
1393
1394 return 0;
1395 }
1396
1397 STATIC int
xfs_fs_fill_super(struct super_block * sb,void * data,int silent)1398 xfs_fs_fill_super(
1399 struct super_block *sb,
1400 void *data,
1401 int silent)
1402 {
1403 struct inode *root;
1404 struct xfs_mount *mp = NULL;
1405 int flags = 0, error = ENOMEM;
1406
1407 mp = kzalloc(sizeof(struct xfs_mount), GFP_KERNEL);
1408 if (!mp)
1409 goto out;
1410
1411 spin_lock_init(&mp->m_sb_lock);
1412 mutex_init(&mp->m_growlock);
1413 atomic_set(&mp->m_active_trans, 0);
1414
1415 mp->m_super = sb;
1416 sb->s_fs_info = mp;
1417
1418 error = xfs_parseargs(mp, (char *)data);
1419 if (error)
1420 goto out_free_fsname;
1421
1422 sb_min_blocksize(sb, BBSIZE);
1423 sb->s_xattr = xfs_xattr_handlers;
1424 sb->s_export_op = &xfs_export_operations;
1425 #ifdef CONFIG_XFS_QUOTA
1426 sb->s_qcop = &xfs_quotactl_operations;
1427 #endif
1428 sb->s_op = &xfs_super_operations;
1429
1430 if (silent)
1431 flags |= XFS_MFSI_QUIET;
1432
1433 error = xfs_open_devices(mp);
1434 if (error)
1435 goto out_free_fsname;
1436
1437 error = xfs_icsb_init_counters(mp);
1438 if (error)
1439 goto out_close_devices;
1440
1441 error = xfs_readsb(mp, flags);
1442 if (error)
1443 goto out_destroy_counters;
1444
1445 error = xfs_finish_flags(mp);
1446 if (error)
1447 goto out_free_sb;
1448
1449 error = xfs_setup_devices(mp);
1450 if (error)
1451 goto out_free_sb;
1452
1453 if (mp->m_flags & XFS_MOUNT_BARRIER)
1454 xfs_mountfs_check_barriers(mp);
1455
1456 error = xfs_filestream_mount(mp);
1457 if (error)
1458 goto out_free_sb;
1459
1460 /*
1461 * we must configure the block size in the superblock before we run the
1462 * full mount process as the mount process can lookup and cache inodes.
1463 * For the same reason we must also initialise the syncd and register
1464 * the inode cache shrinker so that inodes can be reclaimed during
1465 * operations like a quotacheck that iterate all inodes in the
1466 * filesystem.
1467 */
1468 sb->s_magic = XFS_SB_MAGIC;
1469 sb->s_blocksize = mp->m_sb.sb_blocksize;
1470 sb->s_blocksize_bits = ffs(sb->s_blocksize) - 1;
1471 sb->s_maxbytes = xfs_max_file_offset(sb->s_blocksize_bits);
1472 sb->s_time_gran = 1;
1473 set_posix_acl_flag(sb);
1474
1475 error = xfs_syncd_init(mp);
1476 if (error)
1477 goto out_filestream_unmount;
1478
1479 xfs_inode_shrinker_register(mp);
1480
1481 error = xfs_mountfs(mp);
1482 if (error)
1483 goto out_syncd_stop;
1484
1485 root = igrab(VFS_I(mp->m_rootip));
1486 if (!root) {
1487 error = ENOENT;
1488 goto fail_unmount;
1489 }
1490 if (is_bad_inode(root)) {
1491 error = EINVAL;
1492 goto fail_vnrele;
1493 }
1494 sb->s_root = d_alloc_root(root);
1495 if (!sb->s_root) {
1496 error = ENOMEM;
1497 goto fail_vnrele;
1498 }
1499
1500 return 0;
1501
1502 out_syncd_stop:
1503 xfs_inode_shrinker_unregister(mp);
1504 xfs_syncd_stop(mp);
1505 out_filestream_unmount:
1506 xfs_filestream_unmount(mp);
1507 out_free_sb:
1508 xfs_freesb(mp);
1509 out_destroy_counters:
1510 xfs_icsb_destroy_counters(mp);
1511 out_close_devices:
1512 xfs_close_devices(mp);
1513 out_free_fsname:
1514 xfs_free_fsname(mp);
1515 kfree(mp);
1516 out:
1517 return -error;
1518
1519 fail_vnrele:
1520 if (sb->s_root) {
1521 dput(sb->s_root);
1522 sb->s_root = NULL;
1523 } else {
1524 iput(root);
1525 }
1526
1527 fail_unmount:
1528 xfs_inode_shrinker_unregister(mp);
1529 xfs_syncd_stop(mp);
1530
1531 /*
1532 * Blow away any referenced inode in the filestreams cache.
1533 * This can and will cause log traffic as inodes go inactive
1534 * here.
1535 */
1536 xfs_filestream_unmount(mp);
1537
1538 XFS_bflush(mp->m_ddev_targp);
1539
1540 xfs_unmountfs(mp);
1541 goto out_free_sb;
1542 }
1543
1544 STATIC struct dentry *
xfs_fs_mount(struct file_system_type * fs_type,int flags,const char * dev_name,void * data)1545 xfs_fs_mount(
1546 struct file_system_type *fs_type,
1547 int flags,
1548 const char *dev_name,
1549 void *data)
1550 {
1551 return mount_bdev(fs_type, flags, dev_name, data, xfs_fs_fill_super);
1552 }
1553
1554 static const struct super_operations xfs_super_operations = {
1555 .alloc_inode = xfs_fs_alloc_inode,
1556 .destroy_inode = xfs_fs_destroy_inode,
1557 .dirty_inode = xfs_fs_dirty_inode,
1558 .write_inode = xfs_fs_write_inode,
1559 .evict_inode = xfs_fs_evict_inode,
1560 .put_super = xfs_fs_put_super,
1561 .sync_fs = xfs_fs_sync_fs,
1562 .freeze_fs = xfs_fs_freeze,
1563 .unfreeze_fs = xfs_fs_unfreeze,
1564 .statfs = xfs_fs_statfs,
1565 .remount_fs = xfs_fs_remount,
1566 .show_options = xfs_fs_show_options,
1567 };
1568
1569 static struct file_system_type xfs_fs_type = {
1570 .owner = THIS_MODULE,
1571 .name = "xfs",
1572 .mount = xfs_fs_mount,
1573 .kill_sb = kill_block_super,
1574 .fs_flags = FS_REQUIRES_DEV,
1575 };
1576
1577 STATIC int __init
xfs_init_zones(void)1578 xfs_init_zones(void)
1579 {
1580
1581 xfs_ioend_zone = kmem_zone_init(sizeof(xfs_ioend_t), "xfs_ioend");
1582 if (!xfs_ioend_zone)
1583 goto out;
1584
1585 xfs_ioend_pool = mempool_create_slab_pool(4 * MAX_BUF_PER_PAGE,
1586 xfs_ioend_zone);
1587 if (!xfs_ioend_pool)
1588 goto out_destroy_ioend_zone;
1589
1590 xfs_log_ticket_zone = kmem_zone_init(sizeof(xlog_ticket_t),
1591 "xfs_log_ticket");
1592 if (!xfs_log_ticket_zone)
1593 goto out_destroy_ioend_pool;
1594
1595 xfs_bmap_free_item_zone = kmem_zone_init(sizeof(xfs_bmap_free_item_t),
1596 "xfs_bmap_free_item");
1597 if (!xfs_bmap_free_item_zone)
1598 goto out_destroy_log_ticket_zone;
1599
1600 xfs_btree_cur_zone = kmem_zone_init(sizeof(xfs_btree_cur_t),
1601 "xfs_btree_cur");
1602 if (!xfs_btree_cur_zone)
1603 goto out_destroy_bmap_free_item_zone;
1604
1605 xfs_da_state_zone = kmem_zone_init(sizeof(xfs_da_state_t),
1606 "xfs_da_state");
1607 if (!xfs_da_state_zone)
1608 goto out_destroy_btree_cur_zone;
1609
1610 xfs_dabuf_zone = kmem_zone_init(sizeof(xfs_dabuf_t), "xfs_dabuf");
1611 if (!xfs_dabuf_zone)
1612 goto out_destroy_da_state_zone;
1613
1614 xfs_ifork_zone = kmem_zone_init(sizeof(xfs_ifork_t), "xfs_ifork");
1615 if (!xfs_ifork_zone)
1616 goto out_destroy_dabuf_zone;
1617
1618 xfs_trans_zone = kmem_zone_init(sizeof(xfs_trans_t), "xfs_trans");
1619 if (!xfs_trans_zone)
1620 goto out_destroy_ifork_zone;
1621
1622 xfs_log_item_desc_zone =
1623 kmem_zone_init(sizeof(struct xfs_log_item_desc),
1624 "xfs_log_item_desc");
1625 if (!xfs_log_item_desc_zone)
1626 goto out_destroy_trans_zone;
1627
1628 /*
1629 * The size of the zone allocated buf log item is the maximum
1630 * size possible under XFS. This wastes a little bit of memory,
1631 * but it is much faster.
1632 */
1633 xfs_buf_item_zone = kmem_zone_init((sizeof(xfs_buf_log_item_t) +
1634 (((XFS_MAX_BLOCKSIZE / XFS_BLF_CHUNK) /
1635 NBWORD) * sizeof(int))), "xfs_buf_item");
1636 if (!xfs_buf_item_zone)
1637 goto out_destroy_log_item_desc_zone;
1638
1639 xfs_efd_zone = kmem_zone_init((sizeof(xfs_efd_log_item_t) +
1640 ((XFS_EFD_MAX_FAST_EXTENTS - 1) *
1641 sizeof(xfs_extent_t))), "xfs_efd_item");
1642 if (!xfs_efd_zone)
1643 goto out_destroy_buf_item_zone;
1644
1645 xfs_efi_zone = kmem_zone_init((sizeof(xfs_efi_log_item_t) +
1646 ((XFS_EFI_MAX_FAST_EXTENTS - 1) *
1647 sizeof(xfs_extent_t))), "xfs_efi_item");
1648 if (!xfs_efi_zone)
1649 goto out_destroy_efd_zone;
1650
1651 xfs_inode_zone =
1652 kmem_zone_init_flags(sizeof(xfs_inode_t), "xfs_inode",
1653 KM_ZONE_HWALIGN | KM_ZONE_RECLAIM | KM_ZONE_SPREAD,
1654 xfs_fs_inode_init_once);
1655 if (!xfs_inode_zone)
1656 goto out_destroy_efi_zone;
1657
1658 xfs_ili_zone =
1659 kmem_zone_init_flags(sizeof(xfs_inode_log_item_t), "xfs_ili",
1660 KM_ZONE_SPREAD, NULL);
1661 if (!xfs_ili_zone)
1662 goto out_destroy_inode_zone;
1663
1664 return 0;
1665
1666 out_destroy_inode_zone:
1667 kmem_zone_destroy(xfs_inode_zone);
1668 out_destroy_efi_zone:
1669 kmem_zone_destroy(xfs_efi_zone);
1670 out_destroy_efd_zone:
1671 kmem_zone_destroy(xfs_efd_zone);
1672 out_destroy_buf_item_zone:
1673 kmem_zone_destroy(xfs_buf_item_zone);
1674 out_destroy_log_item_desc_zone:
1675 kmem_zone_destroy(xfs_log_item_desc_zone);
1676 out_destroy_trans_zone:
1677 kmem_zone_destroy(xfs_trans_zone);
1678 out_destroy_ifork_zone:
1679 kmem_zone_destroy(xfs_ifork_zone);
1680 out_destroy_dabuf_zone:
1681 kmem_zone_destroy(xfs_dabuf_zone);
1682 out_destroy_da_state_zone:
1683 kmem_zone_destroy(xfs_da_state_zone);
1684 out_destroy_btree_cur_zone:
1685 kmem_zone_destroy(xfs_btree_cur_zone);
1686 out_destroy_bmap_free_item_zone:
1687 kmem_zone_destroy(xfs_bmap_free_item_zone);
1688 out_destroy_log_ticket_zone:
1689 kmem_zone_destroy(xfs_log_ticket_zone);
1690 out_destroy_ioend_pool:
1691 mempool_destroy(xfs_ioend_pool);
1692 out_destroy_ioend_zone:
1693 kmem_zone_destroy(xfs_ioend_zone);
1694 out:
1695 return -ENOMEM;
1696 }
1697
1698 STATIC void
xfs_destroy_zones(void)1699 xfs_destroy_zones(void)
1700 {
1701 kmem_zone_destroy(xfs_ili_zone);
1702 kmem_zone_destroy(xfs_inode_zone);
1703 kmem_zone_destroy(xfs_efi_zone);
1704 kmem_zone_destroy(xfs_efd_zone);
1705 kmem_zone_destroy(xfs_buf_item_zone);
1706 kmem_zone_destroy(xfs_log_item_desc_zone);
1707 kmem_zone_destroy(xfs_trans_zone);
1708 kmem_zone_destroy(xfs_ifork_zone);
1709 kmem_zone_destroy(xfs_dabuf_zone);
1710 kmem_zone_destroy(xfs_da_state_zone);
1711 kmem_zone_destroy(xfs_btree_cur_zone);
1712 kmem_zone_destroy(xfs_bmap_free_item_zone);
1713 kmem_zone_destroy(xfs_log_ticket_zone);
1714 mempool_destroy(xfs_ioend_pool);
1715 kmem_zone_destroy(xfs_ioend_zone);
1716
1717 }
1718
1719 STATIC int __init
xfs_init_workqueues(void)1720 xfs_init_workqueues(void)
1721 {
1722 /*
1723 * max_active is set to 8 to give enough concurency to allow
1724 * multiple work operations on each CPU to run. This allows multiple
1725 * filesystems to be running sync work concurrently, and scales with
1726 * the number of CPUs in the system.
1727 */
1728 xfs_syncd_wq = alloc_workqueue("xfssyncd", WQ_CPU_INTENSIVE, 8);
1729 if (!xfs_syncd_wq)
1730 goto out;
1731
1732 xfs_ail_wq = alloc_workqueue("xfsail", WQ_CPU_INTENSIVE, 8);
1733 if (!xfs_ail_wq)
1734 goto out_destroy_syncd;
1735
1736 return 0;
1737
1738 out_destroy_syncd:
1739 destroy_workqueue(xfs_syncd_wq);
1740 out:
1741 return -ENOMEM;
1742 }
1743
1744 STATIC void
xfs_destroy_workqueues(void)1745 xfs_destroy_workqueues(void)
1746 {
1747 destroy_workqueue(xfs_ail_wq);
1748 destroy_workqueue(xfs_syncd_wq);
1749 }
1750
1751 STATIC int __init
init_xfs_fs(void)1752 init_xfs_fs(void)
1753 {
1754 int error;
1755
1756 printk(KERN_INFO XFS_VERSION_STRING " with "
1757 XFS_BUILD_OPTIONS " enabled\n");
1758
1759 xfs_ioend_init();
1760 xfs_dir_startup();
1761
1762 error = xfs_init_zones();
1763 if (error)
1764 goto out;
1765
1766 error = xfs_init_workqueues();
1767 if (error)
1768 goto out_destroy_zones;
1769
1770 error = xfs_mru_cache_init();
1771 if (error)
1772 goto out_destroy_wq;
1773
1774 error = xfs_filestream_init();
1775 if (error)
1776 goto out_mru_cache_uninit;
1777
1778 error = xfs_buf_init();
1779 if (error)
1780 goto out_filestream_uninit;
1781
1782 error = xfs_init_procfs();
1783 if (error)
1784 goto out_buf_terminate;
1785
1786 error = xfs_sysctl_register();
1787 if (error)
1788 goto out_cleanup_procfs;
1789
1790 error = xfs_init_workqueues();
1791 if (error)
1792 goto out_sysctl_unregister;
1793
1794 vfs_initquota();
1795
1796 error = register_filesystem(&xfs_fs_type);
1797 if (error)
1798 goto out_sysctl_unregister;
1799 return 0;
1800
1801 out_sysctl_unregister:
1802 xfs_sysctl_unregister();
1803 out_cleanup_procfs:
1804 xfs_cleanup_procfs();
1805 out_buf_terminate:
1806 xfs_buf_terminate();
1807 out_filestream_uninit:
1808 xfs_filestream_uninit();
1809 out_mru_cache_uninit:
1810 xfs_mru_cache_uninit();
1811 out_destroy_wq:
1812 xfs_destroy_workqueues();
1813 out_destroy_zones:
1814 xfs_destroy_zones();
1815 out:
1816 return error;
1817 }
1818
1819 STATIC void __exit
exit_xfs_fs(void)1820 exit_xfs_fs(void)
1821 {
1822 vfs_exitquota();
1823 unregister_filesystem(&xfs_fs_type);
1824 xfs_sysctl_unregister();
1825 xfs_cleanup_procfs();
1826 xfs_buf_terminate();
1827 xfs_filestream_uninit();
1828 xfs_mru_cache_uninit();
1829 xfs_destroy_workqueues();
1830 xfs_destroy_zones();
1831 }
1832
1833 module_init(init_xfs_fs);
1834 module_exit(exit_xfs_fs);
1835
1836 MODULE_AUTHOR("Silicon Graphics, Inc.");
1837 MODULE_DESCRIPTION(XFS_VERSION_STRING " with " XFS_BUILD_OPTIONS " enabled");
1838 MODULE_LICENSE("GPL");
1839