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_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_quota.h"
28 #include "xfs_mount.h"
29 #include "xfs_bmap_btree.h"
30 #include "xfs_alloc_btree.h"
31 #include "xfs_ialloc_btree.h"
32 #include "xfs_dinode.h"
33 #include "xfs_inode.h"
34 #include "xfs_btree.h"
35 #include "xfs_ialloc.h"
36 #include "xfs_bmap.h"
37 #include "xfs_rtalloc.h"
38 #include "xfs_error.h"
39 #include "xfs_itable.h"
40 #include "xfs_fsops.h"
41 #include "xfs_attr.h"
42 #include "xfs_buf_item.h"
43 #include "xfs_utils.h"
44 #include "xfs_vnodeops.h"
45 #include "xfs_log_priv.h"
46 #include "xfs_trans_priv.h"
47 #include "xfs_filestream.h"
48 #include "xfs_da_btree.h"
49 #include "xfs_extfree_item.h"
50 #include "xfs_mru_cache.h"
51 #include "xfs_inode_item.h"
52 #include "xfs_icache.h"
53 #include "xfs_trace.h"
54
55 #include <linux/namei.h>
56 #include <linux/init.h>
57 #include <linux/slab.h>
58 #include <linux/mount.h>
59 #include <linux/mempool.h>
60 #include <linux/writeback.h>
61 #include <linux/kthread.h>
62 #include <linux/freezer.h>
63 #include <linux/parser.h>
64
65 static const struct super_operations xfs_super_operations;
66 static kmem_zone_t *xfs_ioend_zone;
67 mempool_t *xfs_ioend_pool;
68
69 #define MNTOPT_LOGBUFS "logbufs" /* number of XFS log buffers */
70 #define MNTOPT_LOGBSIZE "logbsize" /* size of XFS log buffers */
71 #define MNTOPT_LOGDEV "logdev" /* log device */
72 #define MNTOPT_RTDEV "rtdev" /* realtime I/O device */
73 #define MNTOPT_BIOSIZE "biosize" /* log2 of preferred buffered io size */
74 #define MNTOPT_WSYNC "wsync" /* safe-mode nfs compatible mount */
75 #define MNTOPT_NOALIGN "noalign" /* turn off stripe alignment */
76 #define MNTOPT_SWALLOC "swalloc" /* turn on stripe width allocation */
77 #define MNTOPT_SUNIT "sunit" /* data volume stripe unit */
78 #define MNTOPT_SWIDTH "swidth" /* data volume stripe width */
79 #define MNTOPT_NOUUID "nouuid" /* ignore filesystem UUID */
80 #define MNTOPT_MTPT "mtpt" /* filesystem mount point */
81 #define MNTOPT_GRPID "grpid" /* group-ID from parent directory */
82 #define MNTOPT_NOGRPID "nogrpid" /* group-ID from current process */
83 #define MNTOPT_BSDGROUPS "bsdgroups" /* group-ID from parent directory */
84 #define MNTOPT_SYSVGROUPS "sysvgroups" /* group-ID from current process */
85 #define MNTOPT_ALLOCSIZE "allocsize" /* preferred allocation size */
86 #define MNTOPT_NORECOVERY "norecovery" /* don't run XFS recovery */
87 #define MNTOPT_BARRIER "barrier" /* use writer barriers for log write and
88 * unwritten extent conversion */
89 #define MNTOPT_NOBARRIER "nobarrier" /* .. disable */
90 #define MNTOPT_64BITINODE "inode64" /* inodes can be allocated anywhere */
91 #define MNTOPT_32BITINODE "inode32" /* inode allocation limited to
92 * XFS_MAXINUMBER_32 */
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 logging enabled */
114 #define MNTOPT_NODELAYLOG "nodelaylog" /* Delayed logging disabled */
115 #define MNTOPT_DISCARD "discard" /* Discard unused blocks */
116 #define MNTOPT_NODISCARD "nodiscard" /* Do not discard unused blocks */
117
118 /*
119 * Table driven mount option parser.
120 *
121 * Currently only used for remount, but it will be used for mount
122 * in the future, too.
123 */
124 enum {
125 Opt_barrier,
126 Opt_nobarrier,
127 Opt_inode64,
128 Opt_inode32,
129 Opt_err
130 };
131
132 static const match_table_t tokens = {
133 {Opt_barrier, "barrier"},
134 {Opt_nobarrier, "nobarrier"},
135 {Opt_inode64, "inode64"},
136 {Opt_inode32, "inode32"},
137 {Opt_err, NULL}
138 };
139
140
141 STATIC unsigned long
suffix_kstrtoint(char * s,unsigned int base,int * res)142 suffix_kstrtoint(char *s, unsigned int base, int *res)
143 {
144 int last, shift_left_factor = 0, _res;
145 char *value = s;
146
147 last = strlen(value) - 1;
148 if (value[last] == 'K' || value[last] == 'k') {
149 shift_left_factor = 10;
150 value[last] = '\0';
151 }
152 if (value[last] == 'M' || value[last] == 'm') {
153 shift_left_factor = 20;
154 value[last] = '\0';
155 }
156 if (value[last] == 'G' || value[last] == 'g') {
157 shift_left_factor = 30;
158 value[last] = '\0';
159 }
160
161 if (kstrtoint(s, base, &_res))
162 return -EINVAL;
163 *res = _res << shift_left_factor;
164 return 0;
165 }
166
167 /*
168 * This function fills in xfs_mount_t fields based on mount args.
169 * Note: the superblock has _not_ yet been read in.
170 *
171 * Note that this function leaks the various device name allocations on
172 * failure. The caller takes care of them.
173 */
174 STATIC int
xfs_parseargs(struct xfs_mount * mp,char * options)175 xfs_parseargs(
176 struct xfs_mount *mp,
177 char *options)
178 {
179 struct super_block *sb = mp->m_super;
180 char *this_char, *value;
181 int dsunit = 0;
182 int dswidth = 0;
183 int iosize = 0;
184 __uint8_t iosizelog = 0;
185
186 /*
187 * set up the mount name first so all the errors will refer to the
188 * correct device.
189 */
190 mp->m_fsname = kstrndup(sb->s_id, MAXNAMELEN, GFP_KERNEL);
191 if (!mp->m_fsname)
192 return ENOMEM;
193 mp->m_fsname_len = strlen(mp->m_fsname) + 1;
194
195 /*
196 * Copy binary VFS mount flags we are interested in.
197 */
198 if (sb->s_flags & MS_RDONLY)
199 mp->m_flags |= XFS_MOUNT_RDONLY;
200 if (sb->s_flags & MS_DIRSYNC)
201 mp->m_flags |= XFS_MOUNT_DIRSYNC;
202 if (sb->s_flags & MS_SYNCHRONOUS)
203 mp->m_flags |= XFS_MOUNT_WSYNC;
204
205 /*
206 * Set some default flags that could be cleared by the mount option
207 * parsing.
208 */
209 mp->m_flags |= XFS_MOUNT_BARRIER;
210 mp->m_flags |= XFS_MOUNT_COMPAT_IOSIZE;
211 #if !XFS_BIG_INUMS
212 mp->m_flags |= XFS_MOUNT_SMALL_INUMS;
213 #endif
214
215 /*
216 * These can be overridden by the mount option parsing.
217 */
218 mp->m_logbufs = -1;
219 mp->m_logbsize = -1;
220
221 if (!options)
222 goto done;
223
224 while ((this_char = strsep(&options, ",")) != NULL) {
225 if (!*this_char)
226 continue;
227 if ((value = strchr(this_char, '=')) != NULL)
228 *value++ = 0;
229
230 if (!strcmp(this_char, MNTOPT_LOGBUFS)) {
231 if (!value || !*value) {
232 xfs_warn(mp, "%s option requires an argument",
233 this_char);
234 return EINVAL;
235 }
236 if (kstrtoint(value, 10, &mp->m_logbufs))
237 return EINVAL;
238 } else if (!strcmp(this_char, MNTOPT_LOGBSIZE)) {
239 if (!value || !*value) {
240 xfs_warn(mp, "%s option requires an argument",
241 this_char);
242 return EINVAL;
243 }
244 if (suffix_kstrtoint(value, 10, &mp->m_logbsize))
245 return EINVAL;
246 } else if (!strcmp(this_char, MNTOPT_LOGDEV)) {
247 if (!value || !*value) {
248 xfs_warn(mp, "%s option requires an argument",
249 this_char);
250 return EINVAL;
251 }
252 mp->m_logname = kstrndup(value, MAXNAMELEN, GFP_KERNEL);
253 if (!mp->m_logname)
254 return ENOMEM;
255 } else if (!strcmp(this_char, MNTOPT_MTPT)) {
256 xfs_warn(mp, "%s option not allowed on this system",
257 this_char);
258 return EINVAL;
259 } else if (!strcmp(this_char, MNTOPT_RTDEV)) {
260 if (!value || !*value) {
261 xfs_warn(mp, "%s option requires an argument",
262 this_char);
263 return EINVAL;
264 }
265 mp->m_rtname = kstrndup(value, MAXNAMELEN, GFP_KERNEL);
266 if (!mp->m_rtname)
267 return ENOMEM;
268 } else if (!strcmp(this_char, MNTOPT_BIOSIZE)) {
269 if (!value || !*value) {
270 xfs_warn(mp, "%s option requires an argument",
271 this_char);
272 return EINVAL;
273 }
274 if (kstrtoint(value, 10, &iosize))
275 return EINVAL;
276 iosizelog = ffs(iosize) - 1;
277 } else if (!strcmp(this_char, MNTOPT_ALLOCSIZE)) {
278 if (!value || !*value) {
279 xfs_warn(mp, "%s option requires an argument",
280 this_char);
281 return EINVAL;
282 }
283 if (suffix_kstrtoint(value, 10, &iosize))
284 return EINVAL;
285 iosizelog = ffs(iosize) - 1;
286 } else if (!strcmp(this_char, MNTOPT_GRPID) ||
287 !strcmp(this_char, MNTOPT_BSDGROUPS)) {
288 mp->m_flags |= XFS_MOUNT_GRPID;
289 } else if (!strcmp(this_char, MNTOPT_NOGRPID) ||
290 !strcmp(this_char, MNTOPT_SYSVGROUPS)) {
291 mp->m_flags &= ~XFS_MOUNT_GRPID;
292 } else if (!strcmp(this_char, MNTOPT_WSYNC)) {
293 mp->m_flags |= XFS_MOUNT_WSYNC;
294 } else if (!strcmp(this_char, MNTOPT_NORECOVERY)) {
295 mp->m_flags |= XFS_MOUNT_NORECOVERY;
296 } else if (!strcmp(this_char, MNTOPT_NOALIGN)) {
297 mp->m_flags |= XFS_MOUNT_NOALIGN;
298 } else if (!strcmp(this_char, MNTOPT_SWALLOC)) {
299 mp->m_flags |= XFS_MOUNT_SWALLOC;
300 } else if (!strcmp(this_char, MNTOPT_SUNIT)) {
301 if (!value || !*value) {
302 xfs_warn(mp, "%s option requires an argument",
303 this_char);
304 return EINVAL;
305 }
306 if (kstrtoint(value, 10, &dsunit))
307 return EINVAL;
308 } else if (!strcmp(this_char, MNTOPT_SWIDTH)) {
309 if (!value || !*value) {
310 xfs_warn(mp, "%s option requires an argument",
311 this_char);
312 return EINVAL;
313 }
314 if (kstrtoint(value, 10, &dswidth))
315 return EINVAL;
316 } else if (!strcmp(this_char, MNTOPT_32BITINODE)) {
317 mp->m_flags |= XFS_MOUNT_SMALL_INUMS;
318 } else if (!strcmp(this_char, MNTOPT_64BITINODE)) {
319 mp->m_flags &= ~XFS_MOUNT_SMALL_INUMS;
320 #if !XFS_BIG_INUMS
321 xfs_warn(mp, "%s option not allowed on this system",
322 this_char);
323 return EINVAL;
324 #endif
325 } else if (!strcmp(this_char, MNTOPT_NOUUID)) {
326 mp->m_flags |= XFS_MOUNT_NOUUID;
327 } else if (!strcmp(this_char, MNTOPT_BARRIER)) {
328 mp->m_flags |= XFS_MOUNT_BARRIER;
329 } else if (!strcmp(this_char, MNTOPT_NOBARRIER)) {
330 mp->m_flags &= ~XFS_MOUNT_BARRIER;
331 } else if (!strcmp(this_char, MNTOPT_IKEEP)) {
332 mp->m_flags |= XFS_MOUNT_IKEEP;
333 } else if (!strcmp(this_char, MNTOPT_NOIKEEP)) {
334 mp->m_flags &= ~XFS_MOUNT_IKEEP;
335 } else if (!strcmp(this_char, MNTOPT_LARGEIO)) {
336 mp->m_flags &= ~XFS_MOUNT_COMPAT_IOSIZE;
337 } else if (!strcmp(this_char, MNTOPT_NOLARGEIO)) {
338 mp->m_flags |= XFS_MOUNT_COMPAT_IOSIZE;
339 } else if (!strcmp(this_char, MNTOPT_ATTR2)) {
340 mp->m_flags |= XFS_MOUNT_ATTR2;
341 } else if (!strcmp(this_char, MNTOPT_NOATTR2)) {
342 mp->m_flags &= ~XFS_MOUNT_ATTR2;
343 mp->m_flags |= XFS_MOUNT_NOATTR2;
344 } else if (!strcmp(this_char, MNTOPT_FILESTREAM)) {
345 mp->m_flags |= XFS_MOUNT_FILESTREAMS;
346 } else if (!strcmp(this_char, MNTOPT_NOQUOTA)) {
347 mp->m_qflags &= ~XFS_ALL_QUOTA_ACCT;
348 mp->m_qflags &= ~XFS_ALL_QUOTA_ENFD;
349 mp->m_qflags &= ~XFS_ALL_QUOTA_ACTIVE;
350 } else if (!strcmp(this_char, MNTOPT_QUOTA) ||
351 !strcmp(this_char, MNTOPT_UQUOTA) ||
352 !strcmp(this_char, MNTOPT_USRQUOTA)) {
353 mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE |
354 XFS_UQUOTA_ENFD);
355 } else if (!strcmp(this_char, MNTOPT_QUOTANOENF) ||
356 !strcmp(this_char, MNTOPT_UQUOTANOENF)) {
357 mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE);
358 mp->m_qflags &= ~XFS_UQUOTA_ENFD;
359 } else if (!strcmp(this_char, MNTOPT_PQUOTA) ||
360 !strcmp(this_char, MNTOPT_PRJQUOTA)) {
361 mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE |
362 XFS_OQUOTA_ENFD);
363 } else if (!strcmp(this_char, MNTOPT_PQUOTANOENF)) {
364 mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE);
365 mp->m_qflags &= ~XFS_OQUOTA_ENFD;
366 } else if (!strcmp(this_char, MNTOPT_GQUOTA) ||
367 !strcmp(this_char, MNTOPT_GRPQUOTA)) {
368 mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE |
369 XFS_OQUOTA_ENFD);
370 } else if (!strcmp(this_char, MNTOPT_GQUOTANOENF)) {
371 mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE);
372 mp->m_qflags &= ~XFS_OQUOTA_ENFD;
373 } else if (!strcmp(this_char, MNTOPT_DELAYLOG)) {
374 xfs_warn(mp,
375 "delaylog is the default now, option is deprecated.");
376 } else if (!strcmp(this_char, MNTOPT_NODELAYLOG)) {
377 xfs_warn(mp,
378 "nodelaylog support has been removed, option is deprecated.");
379 } else if (!strcmp(this_char, MNTOPT_DISCARD)) {
380 mp->m_flags |= XFS_MOUNT_DISCARD;
381 } else if (!strcmp(this_char, MNTOPT_NODISCARD)) {
382 mp->m_flags &= ~XFS_MOUNT_DISCARD;
383 } else if (!strcmp(this_char, "ihashsize")) {
384 xfs_warn(mp,
385 "ihashsize no longer used, option is deprecated.");
386 } else if (!strcmp(this_char, "osyncisdsync")) {
387 xfs_warn(mp,
388 "osyncisdsync has no effect, option is deprecated.");
389 } else if (!strcmp(this_char, "osyncisosync")) {
390 xfs_warn(mp,
391 "osyncisosync has no effect, option is deprecated.");
392 } else if (!strcmp(this_char, "irixsgid")) {
393 xfs_warn(mp,
394 "irixsgid is now a sysctl(2) variable, option is deprecated.");
395 } else {
396 xfs_warn(mp, "unknown mount option [%s].", this_char);
397 return EINVAL;
398 }
399 }
400
401 /*
402 * no recovery flag requires a read-only mount
403 */
404 if ((mp->m_flags & XFS_MOUNT_NORECOVERY) &&
405 !(mp->m_flags & XFS_MOUNT_RDONLY)) {
406 xfs_warn(mp, "no-recovery mounts must be read-only.");
407 return EINVAL;
408 }
409
410 if ((mp->m_flags & XFS_MOUNT_NOALIGN) && (dsunit || dswidth)) {
411 xfs_warn(mp,
412 "sunit and swidth options incompatible with the noalign option");
413 return EINVAL;
414 }
415
416 #ifndef CONFIG_XFS_QUOTA
417 if (XFS_IS_QUOTA_RUNNING(mp)) {
418 xfs_warn(mp, "quota support not available in this kernel.");
419 return EINVAL;
420 }
421 #endif
422
423 if ((mp->m_qflags & (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE)) &&
424 (mp->m_qflags & (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE))) {
425 xfs_warn(mp, "cannot mount with both project and group quota");
426 return EINVAL;
427 }
428
429 if ((dsunit && !dswidth) || (!dsunit && dswidth)) {
430 xfs_warn(mp, "sunit and swidth must be specified together");
431 return EINVAL;
432 }
433
434 if (dsunit && (dswidth % dsunit != 0)) {
435 xfs_warn(mp,
436 "stripe width (%d) must be a multiple of the stripe unit (%d)",
437 dswidth, dsunit);
438 return EINVAL;
439 }
440
441 done:
442 if (!(mp->m_flags & XFS_MOUNT_NOALIGN)) {
443 /*
444 * At this point the superblock has not been read
445 * in, therefore we do not know the block size.
446 * Before the mount call ends we will convert
447 * these to FSBs.
448 */
449 if (dsunit) {
450 mp->m_dalign = dsunit;
451 mp->m_flags |= XFS_MOUNT_RETERR;
452 }
453
454 if (dswidth)
455 mp->m_swidth = dswidth;
456 }
457
458 if (mp->m_logbufs != -1 &&
459 mp->m_logbufs != 0 &&
460 (mp->m_logbufs < XLOG_MIN_ICLOGS ||
461 mp->m_logbufs > XLOG_MAX_ICLOGS)) {
462 xfs_warn(mp, "invalid logbufs value: %d [not %d-%d]",
463 mp->m_logbufs, XLOG_MIN_ICLOGS, XLOG_MAX_ICLOGS);
464 return XFS_ERROR(EINVAL);
465 }
466 if (mp->m_logbsize != -1 &&
467 mp->m_logbsize != 0 &&
468 (mp->m_logbsize < XLOG_MIN_RECORD_BSIZE ||
469 mp->m_logbsize > XLOG_MAX_RECORD_BSIZE ||
470 !is_power_of_2(mp->m_logbsize))) {
471 xfs_warn(mp,
472 "invalid logbufsize: %d [not 16k,32k,64k,128k or 256k]",
473 mp->m_logbsize);
474 return XFS_ERROR(EINVAL);
475 }
476
477 if (iosizelog) {
478 if (iosizelog > XFS_MAX_IO_LOG ||
479 iosizelog < XFS_MIN_IO_LOG) {
480 xfs_warn(mp, "invalid log iosize: %d [not %d-%d]",
481 iosizelog, XFS_MIN_IO_LOG,
482 XFS_MAX_IO_LOG);
483 return XFS_ERROR(EINVAL);
484 }
485
486 mp->m_flags |= XFS_MOUNT_DFLT_IOSIZE;
487 mp->m_readio_log = iosizelog;
488 mp->m_writeio_log = iosizelog;
489 }
490
491 return 0;
492 }
493
494 struct proc_xfs_info {
495 int flag;
496 char *str;
497 };
498
499 STATIC int
xfs_showargs(struct xfs_mount * mp,struct seq_file * m)500 xfs_showargs(
501 struct xfs_mount *mp,
502 struct seq_file *m)
503 {
504 static struct proc_xfs_info xfs_info_set[] = {
505 /* the few simple ones we can get from the mount struct */
506 { XFS_MOUNT_IKEEP, "," MNTOPT_IKEEP },
507 { XFS_MOUNT_WSYNC, "," MNTOPT_WSYNC },
508 { XFS_MOUNT_NOALIGN, "," MNTOPT_NOALIGN },
509 { XFS_MOUNT_SWALLOC, "," MNTOPT_SWALLOC },
510 { XFS_MOUNT_NOUUID, "," MNTOPT_NOUUID },
511 { XFS_MOUNT_NORECOVERY, "," MNTOPT_NORECOVERY },
512 { XFS_MOUNT_ATTR2, "," MNTOPT_ATTR2 },
513 { XFS_MOUNT_FILESTREAMS, "," MNTOPT_FILESTREAM },
514 { XFS_MOUNT_GRPID, "," MNTOPT_GRPID },
515 { XFS_MOUNT_DISCARD, "," MNTOPT_DISCARD },
516 { XFS_MOUNT_SMALL_INUMS, "," MNTOPT_32BITINODE },
517 { 0, NULL }
518 };
519 static struct proc_xfs_info xfs_info_unset[] = {
520 /* the few simple ones we can get from the mount struct */
521 { XFS_MOUNT_COMPAT_IOSIZE, "," MNTOPT_LARGEIO },
522 { XFS_MOUNT_BARRIER, "," MNTOPT_NOBARRIER },
523 { XFS_MOUNT_SMALL_INUMS, "," MNTOPT_64BITINODE },
524 { 0, NULL }
525 };
526 struct proc_xfs_info *xfs_infop;
527
528 for (xfs_infop = xfs_info_set; xfs_infop->flag; xfs_infop++) {
529 if (mp->m_flags & xfs_infop->flag)
530 seq_puts(m, xfs_infop->str);
531 }
532 for (xfs_infop = xfs_info_unset; xfs_infop->flag; xfs_infop++) {
533 if (!(mp->m_flags & xfs_infop->flag))
534 seq_puts(m, xfs_infop->str);
535 }
536
537 if (mp->m_flags & XFS_MOUNT_DFLT_IOSIZE)
538 seq_printf(m, "," MNTOPT_ALLOCSIZE "=%dk",
539 (int)(1 << mp->m_writeio_log) >> 10);
540
541 if (mp->m_logbufs > 0)
542 seq_printf(m, "," MNTOPT_LOGBUFS "=%d", mp->m_logbufs);
543 if (mp->m_logbsize > 0)
544 seq_printf(m, "," MNTOPT_LOGBSIZE "=%dk", mp->m_logbsize >> 10);
545
546 if (mp->m_logname)
547 seq_printf(m, "," MNTOPT_LOGDEV "=%s", mp->m_logname);
548 if (mp->m_rtname)
549 seq_printf(m, "," MNTOPT_RTDEV "=%s", mp->m_rtname);
550
551 if (mp->m_dalign > 0)
552 seq_printf(m, "," MNTOPT_SUNIT "=%d",
553 (int)XFS_FSB_TO_BB(mp, mp->m_dalign));
554 if (mp->m_swidth > 0)
555 seq_printf(m, "," MNTOPT_SWIDTH "=%d",
556 (int)XFS_FSB_TO_BB(mp, mp->m_swidth));
557
558 if (mp->m_qflags & (XFS_UQUOTA_ACCT|XFS_UQUOTA_ENFD))
559 seq_puts(m, "," MNTOPT_USRQUOTA);
560 else if (mp->m_qflags & XFS_UQUOTA_ACCT)
561 seq_puts(m, "," MNTOPT_UQUOTANOENF);
562
563 /* Either project or group quotas can be active, not both */
564
565 if (mp->m_qflags & XFS_PQUOTA_ACCT) {
566 if (mp->m_qflags & XFS_OQUOTA_ENFD)
567 seq_puts(m, "," MNTOPT_PRJQUOTA);
568 else
569 seq_puts(m, "," MNTOPT_PQUOTANOENF);
570 } else if (mp->m_qflags & XFS_GQUOTA_ACCT) {
571 if (mp->m_qflags & XFS_OQUOTA_ENFD)
572 seq_puts(m, "," MNTOPT_GRPQUOTA);
573 else
574 seq_puts(m, "," MNTOPT_GQUOTANOENF);
575 }
576
577 if (!(mp->m_qflags & XFS_ALL_QUOTA_ACCT))
578 seq_puts(m, "," MNTOPT_NOQUOTA);
579
580 return 0;
581 }
582 __uint64_t
xfs_max_file_offset(unsigned int blockshift)583 xfs_max_file_offset(
584 unsigned int blockshift)
585 {
586 unsigned int pagefactor = 1;
587 unsigned int bitshift = BITS_PER_LONG - 1;
588
589 /* Figure out maximum filesize, on Linux this can depend on
590 * the filesystem blocksize (on 32 bit platforms).
591 * __block_write_begin does this in an [unsigned] long...
592 * page->index << (PAGE_CACHE_SHIFT - bbits)
593 * So, for page sized blocks (4K on 32 bit platforms),
594 * this wraps at around 8Tb (hence MAX_LFS_FILESIZE which is
595 * (((u64)PAGE_CACHE_SIZE << (BITS_PER_LONG-1))-1)
596 * but for smaller blocksizes it is less (bbits = log2 bsize).
597 * Note1: get_block_t takes a long (implicit cast from above)
598 * Note2: The Large Block Device (LBD and HAVE_SECTOR_T) patch
599 * can optionally convert the [unsigned] long from above into
600 * an [unsigned] long long.
601 */
602
603 #if BITS_PER_LONG == 32
604 # if defined(CONFIG_LBDAF)
605 ASSERT(sizeof(sector_t) == 8);
606 pagefactor = PAGE_CACHE_SIZE;
607 bitshift = BITS_PER_LONG;
608 # else
609 pagefactor = PAGE_CACHE_SIZE >> (PAGE_CACHE_SHIFT - blockshift);
610 # endif
611 #endif
612
613 return (((__uint64_t)pagefactor) << bitshift) - 1;
614 }
615
616 xfs_agnumber_t
xfs_set_inode32(struct xfs_mount * mp)617 xfs_set_inode32(struct xfs_mount *mp)
618 {
619 xfs_agnumber_t index = 0;
620 xfs_agnumber_t maxagi = 0;
621 xfs_sb_t *sbp = &mp->m_sb;
622 xfs_agnumber_t max_metadata;
623 xfs_agino_t agino = XFS_OFFBNO_TO_AGINO(mp, sbp->sb_agblocks -1, 0);
624 xfs_ino_t ino = XFS_AGINO_TO_INO(mp, sbp->sb_agcount -1, agino);
625 xfs_perag_t *pag;
626
627 /* Calculate how much should be reserved for inodes to meet
628 * the max inode percentage.
629 */
630 if (mp->m_maxicount) {
631 __uint64_t icount;
632
633 icount = sbp->sb_dblocks * sbp->sb_imax_pct;
634 do_div(icount, 100);
635 icount += sbp->sb_agblocks - 1;
636 do_div(icount, sbp->sb_agblocks);
637 max_metadata = icount;
638 } else {
639 max_metadata = sbp->sb_agcount;
640 }
641
642 for (index = 0; index < sbp->sb_agcount; index++) {
643 ino = XFS_AGINO_TO_INO(mp, index, agino);
644
645 if (ino > XFS_MAXINUMBER_32) {
646 pag = xfs_perag_get(mp, index);
647 pag->pagi_inodeok = 0;
648 pag->pagf_metadata = 0;
649 xfs_perag_put(pag);
650 continue;
651 }
652
653 pag = xfs_perag_get(mp, index);
654 pag->pagi_inodeok = 1;
655 maxagi++;
656 if (index < max_metadata)
657 pag->pagf_metadata = 1;
658 xfs_perag_put(pag);
659 }
660 mp->m_flags |= (XFS_MOUNT_32BITINODES |
661 XFS_MOUNT_SMALL_INUMS);
662
663 return maxagi;
664 }
665
666 xfs_agnumber_t
xfs_set_inode64(struct xfs_mount * mp)667 xfs_set_inode64(struct xfs_mount *mp)
668 {
669 xfs_agnumber_t index = 0;
670
671 for (index = 0; index < mp->m_sb.sb_agcount; index++) {
672 struct xfs_perag *pag;
673
674 pag = xfs_perag_get(mp, index);
675 pag->pagi_inodeok = 1;
676 pag->pagf_metadata = 0;
677 xfs_perag_put(pag);
678 }
679
680 /* There is no need for lock protection on m_flags,
681 * the rw_semaphore of the VFS superblock is locked
682 * during mount/umount/remount operations, so this is
683 * enough to avoid concurency on the m_flags field
684 */
685 mp->m_flags &= ~(XFS_MOUNT_32BITINODES |
686 XFS_MOUNT_SMALL_INUMS);
687 return index;
688 }
689
690 STATIC int
xfs_blkdev_get(xfs_mount_t * mp,const char * name,struct block_device ** bdevp)691 xfs_blkdev_get(
692 xfs_mount_t *mp,
693 const char *name,
694 struct block_device **bdevp)
695 {
696 int error = 0;
697
698 *bdevp = blkdev_get_by_path(name, FMODE_READ|FMODE_WRITE|FMODE_EXCL,
699 mp);
700 if (IS_ERR(*bdevp)) {
701 error = PTR_ERR(*bdevp);
702 xfs_warn(mp, "Invalid device [%s], error=%d\n", name, error);
703 }
704
705 return -error;
706 }
707
708 STATIC void
xfs_blkdev_put(struct block_device * bdev)709 xfs_blkdev_put(
710 struct block_device *bdev)
711 {
712 if (bdev)
713 blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL);
714 }
715
716 void
xfs_blkdev_issue_flush(xfs_buftarg_t * buftarg)717 xfs_blkdev_issue_flush(
718 xfs_buftarg_t *buftarg)
719 {
720 blkdev_issue_flush(buftarg->bt_bdev, GFP_NOFS, NULL);
721 }
722
723 STATIC void
xfs_close_devices(struct xfs_mount * mp)724 xfs_close_devices(
725 struct xfs_mount *mp)
726 {
727 if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp) {
728 struct block_device *logdev = mp->m_logdev_targp->bt_bdev;
729 xfs_free_buftarg(mp, mp->m_logdev_targp);
730 xfs_blkdev_put(logdev);
731 }
732 if (mp->m_rtdev_targp) {
733 struct block_device *rtdev = mp->m_rtdev_targp->bt_bdev;
734 xfs_free_buftarg(mp, mp->m_rtdev_targp);
735 xfs_blkdev_put(rtdev);
736 }
737 xfs_free_buftarg(mp, mp->m_ddev_targp);
738 }
739
740 /*
741 * The file system configurations are:
742 * (1) device (partition) with data and internal log
743 * (2) logical volume with data and log subvolumes.
744 * (3) logical volume with data, log, and realtime subvolumes.
745 *
746 * We only have to handle opening the log and realtime volumes here if
747 * they are present. The data subvolume has already been opened by
748 * get_sb_bdev() and is stored in sb->s_bdev.
749 */
750 STATIC int
xfs_open_devices(struct xfs_mount * mp)751 xfs_open_devices(
752 struct xfs_mount *mp)
753 {
754 struct block_device *ddev = mp->m_super->s_bdev;
755 struct block_device *logdev = NULL, *rtdev = NULL;
756 int error;
757
758 /*
759 * Open real time and log devices - order is important.
760 */
761 if (mp->m_logname) {
762 error = xfs_blkdev_get(mp, mp->m_logname, &logdev);
763 if (error)
764 goto out;
765 }
766
767 if (mp->m_rtname) {
768 error = xfs_blkdev_get(mp, mp->m_rtname, &rtdev);
769 if (error)
770 goto out_close_logdev;
771
772 if (rtdev == ddev || rtdev == logdev) {
773 xfs_warn(mp,
774 "Cannot mount filesystem with identical rtdev and ddev/logdev.");
775 error = EINVAL;
776 goto out_close_rtdev;
777 }
778 }
779
780 /*
781 * Setup xfs_mount buffer target pointers
782 */
783 error = ENOMEM;
784 mp->m_ddev_targp = xfs_alloc_buftarg(mp, ddev, 0, mp->m_fsname);
785 if (!mp->m_ddev_targp)
786 goto out_close_rtdev;
787
788 if (rtdev) {
789 mp->m_rtdev_targp = xfs_alloc_buftarg(mp, rtdev, 1,
790 mp->m_fsname);
791 if (!mp->m_rtdev_targp)
792 goto out_free_ddev_targ;
793 }
794
795 if (logdev && logdev != ddev) {
796 mp->m_logdev_targp = xfs_alloc_buftarg(mp, logdev, 1,
797 mp->m_fsname);
798 if (!mp->m_logdev_targp)
799 goto out_free_rtdev_targ;
800 } else {
801 mp->m_logdev_targp = mp->m_ddev_targp;
802 }
803
804 return 0;
805
806 out_free_rtdev_targ:
807 if (mp->m_rtdev_targp)
808 xfs_free_buftarg(mp, mp->m_rtdev_targp);
809 out_free_ddev_targ:
810 xfs_free_buftarg(mp, mp->m_ddev_targp);
811 out_close_rtdev:
812 if (rtdev)
813 xfs_blkdev_put(rtdev);
814 out_close_logdev:
815 if (logdev && logdev != ddev)
816 xfs_blkdev_put(logdev);
817 out:
818 return error;
819 }
820
821 /*
822 * Setup xfs_mount buffer target pointers based on superblock
823 */
824 STATIC int
xfs_setup_devices(struct xfs_mount * mp)825 xfs_setup_devices(
826 struct xfs_mount *mp)
827 {
828 int error;
829
830 error = xfs_setsize_buftarg(mp->m_ddev_targp, mp->m_sb.sb_blocksize,
831 mp->m_sb.sb_sectsize);
832 if (error)
833 return error;
834
835 if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp) {
836 unsigned int log_sector_size = BBSIZE;
837
838 if (xfs_sb_version_hassector(&mp->m_sb))
839 log_sector_size = mp->m_sb.sb_logsectsize;
840 error = xfs_setsize_buftarg(mp->m_logdev_targp,
841 mp->m_sb.sb_blocksize,
842 log_sector_size);
843 if (error)
844 return error;
845 }
846 if (mp->m_rtdev_targp) {
847 error = xfs_setsize_buftarg(mp->m_rtdev_targp,
848 mp->m_sb.sb_blocksize,
849 mp->m_sb.sb_sectsize);
850 if (error)
851 return error;
852 }
853
854 return 0;
855 }
856
857 STATIC int
xfs_init_mount_workqueues(struct xfs_mount * mp)858 xfs_init_mount_workqueues(
859 struct xfs_mount *mp)
860 {
861 mp->m_data_workqueue = alloc_workqueue("xfs-data/%s",
862 WQ_MEM_RECLAIM, 0, mp->m_fsname);
863 if (!mp->m_data_workqueue)
864 goto out;
865
866 mp->m_unwritten_workqueue = alloc_workqueue("xfs-conv/%s",
867 WQ_MEM_RECLAIM, 0, mp->m_fsname);
868 if (!mp->m_unwritten_workqueue)
869 goto out_destroy_data_iodone_queue;
870
871 mp->m_cil_workqueue = alloc_workqueue("xfs-cil/%s",
872 WQ_MEM_RECLAIM, 0, mp->m_fsname);
873 if (!mp->m_cil_workqueue)
874 goto out_destroy_unwritten;
875
876 mp->m_reclaim_workqueue = alloc_workqueue("xfs-reclaim/%s",
877 WQ_NON_REENTRANT, 0, mp->m_fsname);
878 if (!mp->m_reclaim_workqueue)
879 goto out_destroy_cil;
880
881 mp->m_log_workqueue = alloc_workqueue("xfs-log/%s",
882 WQ_NON_REENTRANT, 0, mp->m_fsname);
883 if (!mp->m_log_workqueue)
884 goto out_destroy_reclaim;
885
886 mp->m_eofblocks_workqueue = alloc_workqueue("xfs-eofblocks/%s",
887 WQ_NON_REENTRANT, 0, mp->m_fsname);
888 if (!mp->m_eofblocks_workqueue)
889 goto out_destroy_log;
890
891 return 0;
892
893 out_destroy_log:
894 destroy_workqueue(mp->m_log_workqueue);
895 out_destroy_reclaim:
896 destroy_workqueue(mp->m_reclaim_workqueue);
897 out_destroy_cil:
898 destroy_workqueue(mp->m_cil_workqueue);
899 out_destroy_unwritten:
900 destroy_workqueue(mp->m_unwritten_workqueue);
901 out_destroy_data_iodone_queue:
902 destroy_workqueue(mp->m_data_workqueue);
903 out:
904 return -ENOMEM;
905 }
906
907 STATIC void
xfs_destroy_mount_workqueues(struct xfs_mount * mp)908 xfs_destroy_mount_workqueues(
909 struct xfs_mount *mp)
910 {
911 destroy_workqueue(mp->m_eofblocks_workqueue);
912 destroy_workqueue(mp->m_log_workqueue);
913 destroy_workqueue(mp->m_reclaim_workqueue);
914 destroy_workqueue(mp->m_cil_workqueue);
915 destroy_workqueue(mp->m_data_workqueue);
916 destroy_workqueue(mp->m_unwritten_workqueue);
917 }
918
919 /*
920 * Flush all dirty data to disk. Must not be called while holding an XFS_ILOCK
921 * or a page lock. We use sync_inodes_sb() here to ensure we block while waiting
922 * for IO to complete so that we effectively throttle multiple callers to the
923 * rate at which IO is completing.
924 */
925 void
xfs_flush_inodes(struct xfs_mount * mp)926 xfs_flush_inodes(
927 struct xfs_mount *mp)
928 {
929 struct super_block *sb = mp->m_super;
930
931 if (down_read_trylock(&sb->s_umount)) {
932 sync_inodes_sb(sb);
933 up_read(&sb->s_umount);
934 }
935 }
936
937 /* Catch misguided souls that try to use this interface on XFS */
938 STATIC struct inode *
xfs_fs_alloc_inode(struct super_block * sb)939 xfs_fs_alloc_inode(
940 struct super_block *sb)
941 {
942 BUG();
943 return NULL;
944 }
945
946 /*
947 * Now that the generic code is guaranteed not to be accessing
948 * the linux inode, we can reclaim the inode.
949 */
950 STATIC void
xfs_fs_destroy_inode(struct inode * inode)951 xfs_fs_destroy_inode(
952 struct inode *inode)
953 {
954 struct xfs_inode *ip = XFS_I(inode);
955
956 trace_xfs_destroy_inode(ip);
957
958 XFS_STATS_INC(vn_reclaim);
959
960 /* bad inode, get out here ASAP */
961 if (is_bad_inode(inode))
962 goto out_reclaim;
963
964 ASSERT(XFS_FORCED_SHUTDOWN(ip->i_mount) || ip->i_delayed_blks == 0);
965
966 /*
967 * We should never get here with one of the reclaim flags already set.
968 */
969 ASSERT_ALWAYS(!xfs_iflags_test(ip, XFS_IRECLAIMABLE));
970 ASSERT_ALWAYS(!xfs_iflags_test(ip, XFS_IRECLAIM));
971
972 /*
973 * We always use background reclaim here because even if the
974 * inode is clean, it still may be under IO and hence we have
975 * to take the flush lock. The background reclaim path handles
976 * this more efficiently than we can here, so simply let background
977 * reclaim tear down all inodes.
978 */
979 out_reclaim:
980 xfs_inode_set_reclaim_tag(ip);
981 }
982
983 /*
984 * Slab object creation initialisation for the XFS inode.
985 * This covers only the idempotent fields in the XFS inode;
986 * all other fields need to be initialised on allocation
987 * from the slab. This avoids the need to repeatedly initialise
988 * fields in the xfs inode that left in the initialise state
989 * when freeing the inode.
990 */
991 STATIC void
xfs_fs_inode_init_once(void * inode)992 xfs_fs_inode_init_once(
993 void *inode)
994 {
995 struct xfs_inode *ip = inode;
996
997 memset(ip, 0, sizeof(struct xfs_inode));
998
999 /* vfs inode */
1000 inode_init_once(VFS_I(ip));
1001
1002 /* xfs inode */
1003 atomic_set(&ip->i_pincount, 0);
1004 spin_lock_init(&ip->i_flags_lock);
1005
1006 mrlock_init(&ip->i_lock, MRLOCK_ALLOW_EQUAL_PRI|MRLOCK_BARRIER,
1007 "xfsino", ip->i_ino);
1008 }
1009
1010 STATIC void
xfs_fs_evict_inode(struct inode * inode)1011 xfs_fs_evict_inode(
1012 struct inode *inode)
1013 {
1014 xfs_inode_t *ip = XFS_I(inode);
1015
1016 ASSERT(!rwsem_is_locked(&ip->i_iolock.mr_lock));
1017
1018 trace_xfs_evict_inode(ip);
1019
1020 truncate_inode_pages(&inode->i_data, 0);
1021 clear_inode(inode);
1022 XFS_STATS_INC(vn_rele);
1023 XFS_STATS_INC(vn_remove);
1024 XFS_STATS_DEC(vn_active);
1025
1026 xfs_inactive(ip);
1027 }
1028
1029 /*
1030 * We do an unlocked check for XFS_IDONTCACHE here because we are already
1031 * serialised against cache hits here via the inode->i_lock and igrab() in
1032 * xfs_iget_cache_hit(). Hence a lookup that might clear this flag will not be
1033 * racing with us, and it avoids needing to grab a spinlock here for every inode
1034 * we drop the final reference on.
1035 */
1036 STATIC int
xfs_fs_drop_inode(struct inode * inode)1037 xfs_fs_drop_inode(
1038 struct inode *inode)
1039 {
1040 struct xfs_inode *ip = XFS_I(inode);
1041
1042 return generic_drop_inode(inode) || (ip->i_flags & XFS_IDONTCACHE);
1043 }
1044
1045 STATIC void
xfs_free_fsname(struct xfs_mount * mp)1046 xfs_free_fsname(
1047 struct xfs_mount *mp)
1048 {
1049 kfree(mp->m_fsname);
1050 kfree(mp->m_rtname);
1051 kfree(mp->m_logname);
1052 }
1053
1054 STATIC void
xfs_fs_put_super(struct super_block * sb)1055 xfs_fs_put_super(
1056 struct super_block *sb)
1057 {
1058 struct xfs_mount *mp = XFS_M(sb);
1059
1060 xfs_filestream_unmount(mp);
1061 xfs_unmountfs(mp);
1062
1063 xfs_freesb(mp);
1064 xfs_icsb_destroy_counters(mp);
1065 xfs_destroy_mount_workqueues(mp);
1066 xfs_close_devices(mp);
1067 xfs_free_fsname(mp);
1068 kfree(mp);
1069 }
1070
1071 STATIC int
xfs_fs_sync_fs(struct super_block * sb,int wait)1072 xfs_fs_sync_fs(
1073 struct super_block *sb,
1074 int wait)
1075 {
1076 struct xfs_mount *mp = XFS_M(sb);
1077
1078 /*
1079 * Doing anything during the async pass would be counterproductive.
1080 */
1081 if (!wait)
1082 return 0;
1083
1084 xfs_log_force(mp, XFS_LOG_SYNC);
1085 if (laptop_mode) {
1086 /*
1087 * The disk must be active because we're syncing.
1088 * We schedule log work now (now that the disk is
1089 * active) instead of later (when it might not be).
1090 */
1091 flush_delayed_work(&mp->m_log->l_work);
1092 }
1093
1094 return 0;
1095 }
1096
1097 STATIC int
xfs_fs_statfs(struct dentry * dentry,struct kstatfs * statp)1098 xfs_fs_statfs(
1099 struct dentry *dentry,
1100 struct kstatfs *statp)
1101 {
1102 struct xfs_mount *mp = XFS_M(dentry->d_sb);
1103 xfs_sb_t *sbp = &mp->m_sb;
1104 struct xfs_inode *ip = XFS_I(dentry->d_inode);
1105 __uint64_t fakeinos, id;
1106 xfs_extlen_t lsize;
1107 __int64_t ffree;
1108
1109 statp->f_type = XFS_SB_MAGIC;
1110 statp->f_namelen = MAXNAMELEN - 1;
1111
1112 id = huge_encode_dev(mp->m_ddev_targp->bt_dev);
1113 statp->f_fsid.val[0] = (u32)id;
1114 statp->f_fsid.val[1] = (u32)(id >> 32);
1115
1116 xfs_icsb_sync_counters(mp, XFS_ICSB_LAZY_COUNT);
1117
1118 spin_lock(&mp->m_sb_lock);
1119 statp->f_bsize = sbp->sb_blocksize;
1120 lsize = sbp->sb_logstart ? sbp->sb_logblocks : 0;
1121 statp->f_blocks = sbp->sb_dblocks - lsize;
1122 statp->f_bfree = statp->f_bavail =
1123 sbp->sb_fdblocks - XFS_ALLOC_SET_ASIDE(mp);
1124 fakeinos = statp->f_bfree << sbp->sb_inopblog;
1125 statp->f_files =
1126 MIN(sbp->sb_icount + fakeinos, (__uint64_t)XFS_MAXINUMBER);
1127 if (mp->m_maxicount)
1128 statp->f_files = min_t(typeof(statp->f_files),
1129 statp->f_files,
1130 mp->m_maxicount);
1131
1132 /* make sure statp->f_ffree does not underflow */
1133 ffree = statp->f_files - (sbp->sb_icount - sbp->sb_ifree);
1134 statp->f_ffree = max_t(__int64_t, ffree, 0);
1135
1136 spin_unlock(&mp->m_sb_lock);
1137
1138 if ((ip->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) &&
1139 ((mp->m_qflags & (XFS_PQUOTA_ACCT|XFS_OQUOTA_ENFD))) ==
1140 (XFS_PQUOTA_ACCT|XFS_OQUOTA_ENFD))
1141 xfs_qm_statvfs(ip, statp);
1142 return 0;
1143 }
1144
1145 STATIC void
xfs_save_resvblks(struct xfs_mount * mp)1146 xfs_save_resvblks(struct xfs_mount *mp)
1147 {
1148 __uint64_t resblks = 0;
1149
1150 mp->m_resblks_save = mp->m_resblks;
1151 xfs_reserve_blocks(mp, &resblks, NULL);
1152 }
1153
1154 STATIC void
xfs_restore_resvblks(struct xfs_mount * mp)1155 xfs_restore_resvblks(struct xfs_mount *mp)
1156 {
1157 __uint64_t resblks;
1158
1159 if (mp->m_resblks_save) {
1160 resblks = mp->m_resblks_save;
1161 mp->m_resblks_save = 0;
1162 } else
1163 resblks = xfs_default_resblks(mp);
1164
1165 xfs_reserve_blocks(mp, &resblks, NULL);
1166 }
1167
1168 /*
1169 * Trigger writeback of all the dirty metadata in the file system.
1170 *
1171 * This ensures that the metadata is written to their location on disk rather
1172 * than just existing in transactions in the log. This means after a quiesce
1173 * there is no log replay required to write the inodes to disk - this is the
1174 * primary difference between a sync and a quiesce.
1175 *
1176 * Note: xfs_log_quiesce() stops background log work - the callers must ensure
1177 * it is started again when appropriate.
1178 */
1179 void
xfs_quiesce_attr(struct xfs_mount * mp)1180 xfs_quiesce_attr(
1181 struct xfs_mount *mp)
1182 {
1183 int error = 0;
1184
1185 /* wait for all modifications to complete */
1186 while (atomic_read(&mp->m_active_trans) > 0)
1187 delay(100);
1188
1189 /* force the log to unpin objects from the now complete transactions */
1190 xfs_log_force(mp, XFS_LOG_SYNC);
1191
1192 /* reclaim inodes to do any IO before the freeze completes */
1193 xfs_reclaim_inodes(mp, 0);
1194 xfs_reclaim_inodes(mp, SYNC_WAIT);
1195
1196 /* Push the superblock and write an unmount record */
1197 error = xfs_log_sbcount(mp);
1198 if (error)
1199 xfs_warn(mp, "xfs_attr_quiesce: failed to log sb changes. "
1200 "Frozen image may not be consistent.");
1201 /*
1202 * Just warn here till VFS can correctly support
1203 * read-only remount without racing.
1204 */
1205 WARN_ON(atomic_read(&mp->m_active_trans) != 0);
1206
1207 xfs_log_quiesce(mp);
1208 }
1209
1210 STATIC int
xfs_fs_remount(struct super_block * sb,int * flags,char * options)1211 xfs_fs_remount(
1212 struct super_block *sb,
1213 int *flags,
1214 char *options)
1215 {
1216 struct xfs_mount *mp = XFS_M(sb);
1217 substring_t args[MAX_OPT_ARGS];
1218 char *p;
1219 int error;
1220
1221 sync_filesystem(sb);
1222 while ((p = strsep(&options, ",")) != NULL) {
1223 int token;
1224
1225 if (!*p)
1226 continue;
1227
1228 token = match_token(p, tokens, args);
1229 switch (token) {
1230 case Opt_barrier:
1231 mp->m_flags |= XFS_MOUNT_BARRIER;
1232 break;
1233 case Opt_nobarrier:
1234 mp->m_flags &= ~XFS_MOUNT_BARRIER;
1235 break;
1236 case Opt_inode64:
1237 mp->m_maxagi = xfs_set_inode64(mp);
1238 break;
1239 case Opt_inode32:
1240 mp->m_maxagi = xfs_set_inode32(mp);
1241 break;
1242 default:
1243 /*
1244 * Logically we would return an error here to prevent
1245 * users from believing they might have changed
1246 * mount options using remount which can't be changed.
1247 *
1248 * But unfortunately mount(8) adds all options from
1249 * mtab and fstab to the mount arguments in some cases
1250 * so we can't blindly reject options, but have to
1251 * check for each specified option if it actually
1252 * differs from the currently set option and only
1253 * reject it if that's the case.
1254 *
1255 * Until that is implemented we return success for
1256 * every remount request, and silently ignore all
1257 * options that we can't actually change.
1258 */
1259 #if 0
1260 xfs_info(mp,
1261 "mount option \"%s\" not supported for remount\n", p);
1262 return -EINVAL;
1263 #else
1264 break;
1265 #endif
1266 }
1267 }
1268
1269 /* ro -> rw */
1270 if ((mp->m_flags & XFS_MOUNT_RDONLY) && !(*flags & MS_RDONLY)) {
1271 mp->m_flags &= ~XFS_MOUNT_RDONLY;
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 xfs_log_work_queue(mp);
1292 }
1293
1294 /* rw -> ro */
1295 if (!(mp->m_flags & XFS_MOUNT_RDONLY) && (*flags & MS_RDONLY)) {
1296 /*
1297 * Before we sync the metadata, we need to free up the reserve
1298 * block pool so that the used block count in the superblock on
1299 * disk is correct at the end of the remount. Stash the current
1300 * reserve pool size so that if we get remounted rw, we can
1301 * return it to the same size.
1302 */
1303 xfs_save_resvblks(mp);
1304 xfs_quiesce_attr(mp);
1305 mp->m_flags |= XFS_MOUNT_RDONLY;
1306 }
1307
1308 return 0;
1309 }
1310
1311 /*
1312 * Second stage of a freeze. The data is already frozen so we only
1313 * need to take care of the metadata. Once that's done write a dummy
1314 * record to dirty the log in case of a crash while frozen.
1315 */
1316 STATIC int
xfs_fs_freeze(struct super_block * sb)1317 xfs_fs_freeze(
1318 struct super_block *sb)
1319 {
1320 struct xfs_mount *mp = XFS_M(sb);
1321
1322 xfs_save_resvblks(mp);
1323 xfs_quiesce_attr(mp);
1324 return -xfs_fs_log_dummy(mp);
1325 }
1326
1327 STATIC int
xfs_fs_unfreeze(struct super_block * sb)1328 xfs_fs_unfreeze(
1329 struct super_block *sb)
1330 {
1331 struct xfs_mount *mp = XFS_M(sb);
1332
1333 xfs_restore_resvblks(mp);
1334 xfs_log_work_queue(mp);
1335 return 0;
1336 }
1337
1338 STATIC int
xfs_fs_show_options(struct seq_file * m,struct dentry * root)1339 xfs_fs_show_options(
1340 struct seq_file *m,
1341 struct dentry *root)
1342 {
1343 return -xfs_showargs(XFS_M(root->d_sb), m);
1344 }
1345
1346 /*
1347 * This function fills in xfs_mount_t fields based on mount args.
1348 * Note: the superblock _has_ now been read in.
1349 */
1350 STATIC int
xfs_finish_flags(struct xfs_mount * mp)1351 xfs_finish_flags(
1352 struct xfs_mount *mp)
1353 {
1354 int ronly = (mp->m_flags & XFS_MOUNT_RDONLY);
1355
1356 /* Fail a mount where the logbuf is smaller than the log stripe */
1357 if (xfs_sb_version_haslogv2(&mp->m_sb)) {
1358 if (mp->m_logbsize <= 0 &&
1359 mp->m_sb.sb_logsunit > XLOG_BIG_RECORD_BSIZE) {
1360 mp->m_logbsize = mp->m_sb.sb_logsunit;
1361 } else if (mp->m_logbsize > 0 &&
1362 mp->m_logbsize < mp->m_sb.sb_logsunit) {
1363 xfs_warn(mp,
1364 "logbuf size must be greater than or equal to log stripe size");
1365 return XFS_ERROR(EINVAL);
1366 }
1367 } else {
1368 /* Fail a mount if the logbuf is larger than 32K */
1369 if (mp->m_logbsize > XLOG_BIG_RECORD_BSIZE) {
1370 xfs_warn(mp,
1371 "logbuf size for version 1 logs must be 16K or 32K");
1372 return XFS_ERROR(EINVAL);
1373 }
1374 }
1375
1376 /*
1377 * V5 filesystems always use attr2 format for attributes.
1378 */
1379 if (xfs_sb_version_hascrc(&mp->m_sb) &&
1380 (mp->m_flags & XFS_MOUNT_NOATTR2)) {
1381 xfs_warn(mp,
1382 "Cannot mount a V5 filesystem as %s. %s is always enabled for V5 filesystems.",
1383 MNTOPT_NOATTR2, MNTOPT_ATTR2);
1384 return XFS_ERROR(EINVAL);
1385 }
1386
1387 /*
1388 * mkfs'ed attr2 will turn on attr2 mount unless explicitly
1389 * told by noattr2 to turn it off
1390 */
1391 if (xfs_sb_version_hasattr2(&mp->m_sb) &&
1392 !(mp->m_flags & XFS_MOUNT_NOATTR2))
1393 mp->m_flags |= XFS_MOUNT_ATTR2;
1394
1395 /*
1396 * prohibit r/w mounts of read-only filesystems
1397 */
1398 if ((mp->m_sb.sb_flags & XFS_SBF_READONLY) && !ronly) {
1399 xfs_warn(mp,
1400 "cannot mount a read-only filesystem as read-write");
1401 return XFS_ERROR(EROFS);
1402 }
1403
1404 return 0;
1405 }
1406
1407 STATIC int
xfs_fs_fill_super(struct super_block * sb,void * data,int silent)1408 xfs_fs_fill_super(
1409 struct super_block *sb,
1410 void *data,
1411 int silent)
1412 {
1413 struct inode *root;
1414 struct xfs_mount *mp = NULL;
1415 int flags = 0, error = ENOMEM;
1416
1417 mp = kzalloc(sizeof(struct xfs_mount), GFP_KERNEL);
1418 if (!mp)
1419 goto out;
1420
1421 spin_lock_init(&mp->m_sb_lock);
1422 mutex_init(&mp->m_growlock);
1423 atomic_set(&mp->m_active_trans, 0);
1424 INIT_DELAYED_WORK(&mp->m_reclaim_work, xfs_reclaim_worker);
1425 INIT_DELAYED_WORK(&mp->m_eofblocks_work, xfs_eofblocks_worker);
1426
1427 mp->m_super = sb;
1428 sb->s_fs_info = mp;
1429
1430 error = xfs_parseargs(mp, (char *)data);
1431 if (error)
1432 goto out_free_fsname;
1433
1434 sb_min_blocksize(sb, BBSIZE);
1435 sb->s_xattr = xfs_xattr_handlers;
1436 sb->s_export_op = &xfs_export_operations;
1437 #ifdef CONFIG_XFS_QUOTA
1438 sb->s_qcop = &xfs_quotactl_operations;
1439 #endif
1440 sb->s_op = &xfs_super_operations;
1441
1442 if (silent)
1443 flags |= XFS_MFSI_QUIET;
1444
1445 error = xfs_open_devices(mp);
1446 if (error)
1447 goto out_free_fsname;
1448
1449 error = xfs_init_mount_workqueues(mp);
1450 if (error)
1451 goto out_close_devices;
1452
1453 error = xfs_icsb_init_counters(mp);
1454 if (error)
1455 goto out_destroy_workqueues;
1456
1457 error = xfs_readsb(mp, flags);
1458 if (error)
1459 goto out_destroy_counters;
1460
1461 error = xfs_finish_flags(mp);
1462 if (error)
1463 goto out_free_sb;
1464
1465 error = xfs_setup_devices(mp);
1466 if (error)
1467 goto out_free_sb;
1468
1469 error = xfs_filestream_mount(mp);
1470 if (error)
1471 goto out_free_sb;
1472
1473 /*
1474 * we must configure the block size in the superblock before we run the
1475 * full mount process as the mount process can lookup and cache inodes.
1476 */
1477 sb->s_magic = XFS_SB_MAGIC;
1478 sb->s_blocksize = mp->m_sb.sb_blocksize;
1479 sb->s_blocksize_bits = ffs(sb->s_blocksize) - 1;
1480 sb->s_maxbytes = xfs_max_file_offset(sb->s_blocksize_bits);
1481 sb->s_max_links = XFS_MAXLINK;
1482 sb->s_time_gran = 1;
1483 set_posix_acl_flag(sb);
1484
1485 error = xfs_mountfs(mp);
1486 if (error)
1487 goto out_filestream_unmount;
1488
1489 root = igrab(VFS_I(mp->m_rootip));
1490 if (!root) {
1491 error = ENOENT;
1492 goto out_unmount;
1493 }
1494 if (is_bad_inode(root)) {
1495 error = EINVAL;
1496 goto out_unmount;
1497 }
1498 sb->s_root = d_make_root(root);
1499 if (!sb->s_root) {
1500 error = ENOMEM;
1501 goto out_unmount;
1502 }
1503
1504 return 0;
1505
1506 out_filestream_unmount:
1507 xfs_filestream_unmount(mp);
1508 out_free_sb:
1509 xfs_freesb(mp);
1510 out_destroy_counters:
1511 xfs_icsb_destroy_counters(mp);
1512 out_destroy_workqueues:
1513 xfs_destroy_mount_workqueues(mp);
1514 out_close_devices:
1515 xfs_close_devices(mp);
1516 out_free_fsname:
1517 xfs_free_fsname(mp);
1518 kfree(mp);
1519 out:
1520 return -error;
1521
1522 out_unmount:
1523 xfs_filestream_unmount(mp);
1524 xfs_unmountfs(mp);
1525 goto out_free_sb;
1526 }
1527
1528 STATIC struct dentry *
xfs_fs_mount(struct file_system_type * fs_type,int flags,const char * dev_name,void * data)1529 xfs_fs_mount(
1530 struct file_system_type *fs_type,
1531 int flags,
1532 const char *dev_name,
1533 void *data)
1534 {
1535 return mount_bdev(fs_type, flags, dev_name, data, xfs_fs_fill_super);
1536 }
1537
1538 static int
xfs_fs_nr_cached_objects(struct super_block * sb)1539 xfs_fs_nr_cached_objects(
1540 struct super_block *sb)
1541 {
1542 return xfs_reclaim_inodes_count(XFS_M(sb));
1543 }
1544
1545 static void
xfs_fs_free_cached_objects(struct super_block * sb,int nr_to_scan)1546 xfs_fs_free_cached_objects(
1547 struct super_block *sb,
1548 int nr_to_scan)
1549 {
1550 xfs_reclaim_inodes_nr(XFS_M(sb), nr_to_scan);
1551 }
1552
1553 static const struct super_operations xfs_super_operations = {
1554 .alloc_inode = xfs_fs_alloc_inode,
1555 .destroy_inode = xfs_fs_destroy_inode,
1556 .evict_inode = xfs_fs_evict_inode,
1557 .drop_inode = xfs_fs_drop_inode,
1558 .put_super = xfs_fs_put_super,
1559 .sync_fs = xfs_fs_sync_fs,
1560 .freeze_fs = xfs_fs_freeze,
1561 .unfreeze_fs = xfs_fs_unfreeze,
1562 .statfs = xfs_fs_statfs,
1563 .remount_fs = xfs_fs_remount,
1564 .show_options = xfs_fs_show_options,
1565 .nr_cached_objects = xfs_fs_nr_cached_objects,
1566 .free_cached_objects = xfs_fs_free_cached_objects,
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 MODULE_ALIAS_FS("xfs");
1577
1578 STATIC int __init
xfs_init_zones(void)1579 xfs_init_zones(void)
1580 {
1581
1582 xfs_ioend_zone = kmem_zone_init(sizeof(xfs_ioend_t), "xfs_ioend");
1583 if (!xfs_ioend_zone)
1584 goto out;
1585
1586 xfs_ioend_pool = mempool_create_slab_pool(4 * MAX_BUF_PER_PAGE,
1587 xfs_ioend_zone);
1588 if (!xfs_ioend_pool)
1589 goto out_destroy_ioend_zone;
1590
1591 xfs_log_ticket_zone = kmem_zone_init(sizeof(xlog_ticket_t),
1592 "xfs_log_ticket");
1593 if (!xfs_log_ticket_zone)
1594 goto out_destroy_ioend_pool;
1595
1596 xfs_bmap_free_item_zone = kmem_zone_init(sizeof(xfs_bmap_free_item_t),
1597 "xfs_bmap_free_item");
1598 if (!xfs_bmap_free_item_zone)
1599 goto out_destroy_log_ticket_zone;
1600
1601 xfs_btree_cur_zone = kmem_zone_init(sizeof(xfs_btree_cur_t),
1602 "xfs_btree_cur");
1603 if (!xfs_btree_cur_zone)
1604 goto out_destroy_bmap_free_item_zone;
1605
1606 xfs_da_state_zone = kmem_zone_init(sizeof(xfs_da_state_t),
1607 "xfs_da_state");
1608 if (!xfs_da_state_zone)
1609 goto out_destroy_btree_cur_zone;
1610
1611 xfs_ifork_zone = kmem_zone_init(sizeof(xfs_ifork_t), "xfs_ifork");
1612 if (!xfs_ifork_zone)
1613 goto out_destroy_da_state_zone;
1614
1615 xfs_trans_zone = kmem_zone_init(sizeof(xfs_trans_t), "xfs_trans");
1616 if (!xfs_trans_zone)
1617 goto out_destroy_ifork_zone;
1618
1619 xfs_log_item_desc_zone =
1620 kmem_zone_init(sizeof(struct xfs_log_item_desc),
1621 "xfs_log_item_desc");
1622 if (!xfs_log_item_desc_zone)
1623 goto out_destroy_trans_zone;
1624
1625 /*
1626 * The size of the zone allocated buf log item is the maximum
1627 * size possible under XFS. This wastes a little bit of memory,
1628 * but it is much faster.
1629 */
1630 xfs_buf_item_zone = kmem_zone_init(sizeof(struct xfs_buf_log_item),
1631 "xfs_buf_item");
1632 if (!xfs_buf_item_zone)
1633 goto out_destroy_log_item_desc_zone;
1634
1635 xfs_efd_zone = kmem_zone_init((sizeof(xfs_efd_log_item_t) +
1636 ((XFS_EFD_MAX_FAST_EXTENTS - 1) *
1637 sizeof(xfs_extent_t))), "xfs_efd_item");
1638 if (!xfs_efd_zone)
1639 goto out_destroy_buf_item_zone;
1640
1641 xfs_efi_zone = kmem_zone_init((sizeof(xfs_efi_log_item_t) +
1642 ((XFS_EFI_MAX_FAST_EXTENTS - 1) *
1643 sizeof(xfs_extent_t))), "xfs_efi_item");
1644 if (!xfs_efi_zone)
1645 goto out_destroy_efd_zone;
1646
1647 xfs_inode_zone =
1648 kmem_zone_init_flags(sizeof(xfs_inode_t), "xfs_inode",
1649 KM_ZONE_HWALIGN | KM_ZONE_RECLAIM | KM_ZONE_SPREAD,
1650 xfs_fs_inode_init_once);
1651 if (!xfs_inode_zone)
1652 goto out_destroy_efi_zone;
1653
1654 xfs_ili_zone =
1655 kmem_zone_init_flags(sizeof(xfs_inode_log_item_t), "xfs_ili",
1656 KM_ZONE_SPREAD, NULL);
1657 if (!xfs_ili_zone)
1658 goto out_destroy_inode_zone;
1659
1660 return 0;
1661
1662 out_destroy_inode_zone:
1663 kmem_zone_destroy(xfs_inode_zone);
1664 out_destroy_efi_zone:
1665 kmem_zone_destroy(xfs_efi_zone);
1666 out_destroy_efd_zone:
1667 kmem_zone_destroy(xfs_efd_zone);
1668 out_destroy_buf_item_zone:
1669 kmem_zone_destroy(xfs_buf_item_zone);
1670 out_destroy_log_item_desc_zone:
1671 kmem_zone_destroy(xfs_log_item_desc_zone);
1672 out_destroy_trans_zone:
1673 kmem_zone_destroy(xfs_trans_zone);
1674 out_destroy_ifork_zone:
1675 kmem_zone_destroy(xfs_ifork_zone);
1676 out_destroy_da_state_zone:
1677 kmem_zone_destroy(xfs_da_state_zone);
1678 out_destroy_btree_cur_zone:
1679 kmem_zone_destroy(xfs_btree_cur_zone);
1680 out_destroy_bmap_free_item_zone:
1681 kmem_zone_destroy(xfs_bmap_free_item_zone);
1682 out_destroy_log_ticket_zone:
1683 kmem_zone_destroy(xfs_log_ticket_zone);
1684 out_destroy_ioend_pool:
1685 mempool_destroy(xfs_ioend_pool);
1686 out_destroy_ioend_zone:
1687 kmem_zone_destroy(xfs_ioend_zone);
1688 out:
1689 return -ENOMEM;
1690 }
1691
1692 STATIC void
xfs_destroy_zones(void)1693 xfs_destroy_zones(void)
1694 {
1695 /*
1696 * Make sure all delayed rcu free are flushed before we
1697 * destroy caches.
1698 */
1699 rcu_barrier();
1700 kmem_zone_destroy(xfs_ili_zone);
1701 kmem_zone_destroy(xfs_inode_zone);
1702 kmem_zone_destroy(xfs_efi_zone);
1703 kmem_zone_destroy(xfs_efd_zone);
1704 kmem_zone_destroy(xfs_buf_item_zone);
1705 kmem_zone_destroy(xfs_log_item_desc_zone);
1706 kmem_zone_destroy(xfs_trans_zone);
1707 kmem_zone_destroy(xfs_ifork_zone);
1708 kmem_zone_destroy(xfs_da_state_zone);
1709 kmem_zone_destroy(xfs_btree_cur_zone);
1710 kmem_zone_destroy(xfs_bmap_free_item_zone);
1711 kmem_zone_destroy(xfs_log_ticket_zone);
1712 mempool_destroy(xfs_ioend_pool);
1713 kmem_zone_destroy(xfs_ioend_zone);
1714
1715 }
1716
1717 STATIC int __init
xfs_init_workqueues(void)1718 xfs_init_workqueues(void)
1719 {
1720 /*
1721 * The allocation workqueue can be used in memory reclaim situations
1722 * (writepage path), and parallelism is only limited by the number of
1723 * AGs in all the filesystems mounted. Hence use the default large
1724 * max_active value for this workqueue.
1725 */
1726 xfs_alloc_wq = alloc_workqueue("xfsalloc", WQ_MEM_RECLAIM, 0);
1727 if (!xfs_alloc_wq)
1728 return -ENOMEM;
1729
1730 return 0;
1731 }
1732
1733 STATIC void
xfs_destroy_workqueues(void)1734 xfs_destroy_workqueues(void)
1735 {
1736 destroy_workqueue(xfs_alloc_wq);
1737 }
1738
1739 STATIC int __init
init_xfs_fs(void)1740 init_xfs_fs(void)
1741 {
1742 int error;
1743
1744 printk(KERN_INFO XFS_VERSION_STRING " with "
1745 XFS_BUILD_OPTIONS " enabled\n");
1746
1747 xfs_dir_startup();
1748
1749 error = xfs_init_zones();
1750 if (error)
1751 goto out;
1752
1753 error = xfs_init_workqueues();
1754 if (error)
1755 goto out_destroy_zones;
1756
1757 error = xfs_mru_cache_init();
1758 if (error)
1759 goto out_destroy_wq;
1760
1761 error = xfs_filestream_init();
1762 if (error)
1763 goto out_mru_cache_uninit;
1764
1765 error = xfs_buf_init();
1766 if (error)
1767 goto out_filestream_uninit;
1768
1769 error = xfs_init_procfs();
1770 if (error)
1771 goto out_buf_terminate;
1772
1773 error = xfs_sysctl_register();
1774 if (error)
1775 goto out_cleanup_procfs;
1776
1777 error = xfs_qm_init();
1778 if (error)
1779 goto out_sysctl_unregister;
1780
1781 error = register_filesystem(&xfs_fs_type);
1782 if (error)
1783 goto out_qm_exit;
1784 return 0;
1785
1786 out_qm_exit:
1787 xfs_qm_exit();
1788 out_sysctl_unregister:
1789 xfs_sysctl_unregister();
1790 out_cleanup_procfs:
1791 xfs_cleanup_procfs();
1792 out_buf_terminate:
1793 xfs_buf_terminate();
1794 out_filestream_uninit:
1795 xfs_filestream_uninit();
1796 out_mru_cache_uninit:
1797 xfs_mru_cache_uninit();
1798 out_destroy_wq:
1799 xfs_destroy_workqueues();
1800 out_destroy_zones:
1801 xfs_destroy_zones();
1802 out:
1803 return error;
1804 }
1805
1806 STATIC void __exit
exit_xfs_fs(void)1807 exit_xfs_fs(void)
1808 {
1809 xfs_qm_exit();
1810 unregister_filesystem(&xfs_fs_type);
1811 xfs_sysctl_unregister();
1812 xfs_cleanup_procfs();
1813 xfs_buf_terminate();
1814 xfs_filestream_uninit();
1815 xfs_mru_cache_uninit();
1816 xfs_destroy_workqueues();
1817 xfs_destroy_zones();
1818 }
1819
1820 module_init(init_xfs_fs);
1821 module_exit(exit_xfs_fs);
1822
1823 MODULE_AUTHOR("Silicon Graphics, Inc.");
1824 MODULE_DESCRIPTION(XFS_VERSION_STRING " with " XFS_BUILD_OPTIONS " enabled");
1825 MODULE_LICENSE("GPL");
1826