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xfs: kill xfs_qmops
[deliverable/linux.git] / fs / xfs / linux-2.6 / xfs_super.c
1 /*
2 * Copyright (c) 2000-2006 Silicon Graphics, Inc.
3 * All Rights Reserved.
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
7 * published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it would be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write the Free Software Foundation,
16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
17 */
18 #include "xfs.h"
19 #include "xfs_bit.h"
20 #include "xfs_log.h"
21 #include "xfs_inum.h"
22 #include "xfs_trans.h"
23 #include "xfs_sb.h"
24 #include "xfs_ag.h"
25 #include "xfs_dir2.h"
26 #include "xfs_alloc.h"
27 #include "xfs_dmapi.h"
28 #include "xfs_quota.h"
29 #include "xfs_mount.h"
30 #include "xfs_bmap_btree.h"
31 #include "xfs_alloc_btree.h"
32 #include "xfs_ialloc_btree.h"
33 #include "xfs_dir2_sf.h"
34 #include "xfs_attr_sf.h"
35 #include "xfs_dinode.h"
36 #include "xfs_inode.h"
37 #include "xfs_btree.h"
38 #include "xfs_btree_trace.h"
39 #include "xfs_ialloc.h"
40 #include "xfs_bmap.h"
41 #include "xfs_rtalloc.h"
42 #include "xfs_error.h"
43 #include "xfs_itable.h"
44 #include "xfs_fsops.h"
45 #include "xfs_rw.h"
46 #include "xfs_acl.h"
47 #include "xfs_attr.h"
48 #include "xfs_buf_item.h"
49 #include "xfs_utils.h"
50 #include "xfs_vnodeops.h"
51 #include "xfs_version.h"
52 #include "xfs_log_priv.h"
53 #include "xfs_trans_priv.h"
54 #include "xfs_filestream.h"
55 #include "xfs_da_btree.h"
56 #include "xfs_dir2_trace.h"
57 #include "xfs_extfree_item.h"
58 #include "xfs_mru_cache.h"
59 #include "xfs_inode_item.h"
60 #include "xfs_sync.h"
61
62 #include <linux/namei.h>
63 #include <linux/init.h>
64 #include <linux/mount.h>
65 #include <linux/mempool.h>
66 #include <linux/writeback.h>
67 #include <linux/kthread.h>
68 #include <linux/freezer.h>
69 #include <linux/parser.h>
70
71 static struct super_operations xfs_super_operations;
72 static kmem_zone_t *xfs_ioend_zone;
73 mempool_t *xfs_ioend_pool;
74
75 #define MNTOPT_LOGBUFS "logbufs" /* number of XFS log buffers */
76 #define MNTOPT_LOGBSIZE "logbsize" /* size of XFS log buffers */
77 #define MNTOPT_LOGDEV "logdev" /* log device */
78 #define MNTOPT_RTDEV "rtdev" /* realtime I/O device */
79 #define MNTOPT_BIOSIZE "biosize" /* log2 of preferred buffered io size */
80 #define MNTOPT_WSYNC "wsync" /* safe-mode nfs compatible mount */
81 #define MNTOPT_NOALIGN "noalign" /* turn off stripe alignment */
82 #define MNTOPT_SWALLOC "swalloc" /* turn on stripe width allocation */
83 #define MNTOPT_SUNIT "sunit" /* data volume stripe unit */
84 #define MNTOPT_SWIDTH "swidth" /* data volume stripe width */
85 #define MNTOPT_NOUUID "nouuid" /* ignore filesystem UUID */
86 #define MNTOPT_MTPT "mtpt" /* filesystem mount point */
87 #define MNTOPT_GRPID "grpid" /* group-ID from parent directory */
88 #define MNTOPT_NOGRPID "nogrpid" /* group-ID from current process */
89 #define MNTOPT_BSDGROUPS "bsdgroups" /* group-ID from parent directory */
90 #define MNTOPT_SYSVGROUPS "sysvgroups" /* group-ID from current process */
91 #define MNTOPT_ALLOCSIZE "allocsize" /* preferred allocation size */
92 #define MNTOPT_NORECOVERY "norecovery" /* don't run XFS recovery */
93 #define MNTOPT_BARRIER "barrier" /* use writer barriers for log write and
94 * unwritten extent conversion */
95 #define MNTOPT_NOBARRIER "nobarrier" /* .. disable */
96 #define MNTOPT_OSYNCISOSYNC "osyncisosync" /* o_sync is REALLY o_sync */
97 #define MNTOPT_64BITINODE "inode64" /* inodes can be allocated anywhere */
98 #define MNTOPT_IKEEP "ikeep" /* do not free empty inode clusters */
99 #define MNTOPT_NOIKEEP "noikeep" /* free empty inode clusters */
100 #define MNTOPT_LARGEIO "largeio" /* report large I/O sizes in stat() */
101 #define MNTOPT_NOLARGEIO "nolargeio" /* do not report large I/O sizes
102 * in stat(). */
103 #define MNTOPT_ATTR2 "attr2" /* do use attr2 attribute format */
104 #define MNTOPT_NOATTR2 "noattr2" /* do not use attr2 attribute format */
105 #define MNTOPT_FILESTREAM "filestreams" /* use filestreams allocator */
106 #define MNTOPT_QUOTA "quota" /* disk quotas (user) */
107 #define MNTOPT_NOQUOTA "noquota" /* no quotas */
108 #define MNTOPT_USRQUOTA "usrquota" /* user quota enabled */
109 #define MNTOPT_GRPQUOTA "grpquota" /* group quota enabled */
110 #define MNTOPT_PRJQUOTA "prjquota" /* project quota enabled */
111 #define MNTOPT_UQUOTA "uquota" /* user quota (IRIX variant) */
112 #define MNTOPT_GQUOTA "gquota" /* group quota (IRIX variant) */
113 #define MNTOPT_PQUOTA "pquota" /* project quota (IRIX variant) */
114 #define MNTOPT_UQUOTANOENF "uqnoenforce"/* user quota limit enforcement */
115 #define MNTOPT_GQUOTANOENF "gqnoenforce"/* group quota limit enforcement */
116 #define MNTOPT_PQUOTANOENF "pqnoenforce"/* project quota limit enforcement */
117 #define MNTOPT_QUOTANOENF "qnoenforce" /* same as uqnoenforce */
118 #define MNTOPT_DMAPI "dmapi" /* DMI enabled (DMAPI / XDSM) */
119 #define MNTOPT_XDSM "xdsm" /* DMI enabled (DMAPI / XDSM) */
120 #define MNTOPT_DMI "dmi" /* DMI enabled (DMAPI / XDSM) */
121
122 /*
123 * Table driven mount option parser.
124 *
125 * Currently only used for remount, but it will be used for mount
126 * in the future, too.
127 */
128 enum {
129 Opt_barrier, Opt_nobarrier, Opt_err
130 };
131
132 static const match_table_t tokens = {
133 {Opt_barrier, "barrier"},
134 {Opt_nobarrier, "nobarrier"},
135 {Opt_err, NULL}
136 };
137
138
139 STATIC unsigned long
140 suffix_strtoul(char *s, char **endp, unsigned int base)
141 {
142 int last, shift_left_factor = 0;
143 char *value = s;
144
145 last = strlen(value) - 1;
146 if (value[last] == 'K' || value[last] == 'k') {
147 shift_left_factor = 10;
148 value[last] = '\0';
149 }
150 if (value[last] == 'M' || value[last] == 'm') {
151 shift_left_factor = 20;
152 value[last] = '\0';
153 }
154 if (value[last] == 'G' || value[last] == 'g') {
155 shift_left_factor = 30;
156 value[last] = '\0';
157 }
158
159 return simple_strtoul((const char *)s, endp, base) << shift_left_factor;
160 }
161
162 /*
163 * This function fills in xfs_mount_t fields based on mount args.
164 * Note: the superblock has _not_ yet been read in.
165 *
166 * Note that this function leaks the various device name allocations on
167 * failure. The caller takes care of them.
168 */
169 STATIC int
170 xfs_parseargs(
171 struct xfs_mount *mp,
172 char *options,
173 char **mtpt)
174 {
175 struct super_block *sb = mp->m_super;
176 char *this_char, *value, *eov;
177 int dsunit = 0;
178 int dswidth = 0;
179 int iosize = 0;
180 int dmapi_implies_ikeep = 1;
181 __uint8_t iosizelog = 0;
182
183 /*
184 * Copy binary VFS mount flags we are interested in.
185 */
186 if (sb->s_flags & MS_RDONLY)
187 mp->m_flags |= XFS_MOUNT_RDONLY;
188 if (sb->s_flags & MS_DIRSYNC)
189 mp->m_flags |= XFS_MOUNT_DIRSYNC;
190 if (sb->s_flags & MS_SYNCHRONOUS)
191 mp->m_flags |= XFS_MOUNT_WSYNC;
192
193 /*
194 * Set some default flags that could be cleared by the mount option
195 * parsing.
196 */
197 mp->m_flags |= XFS_MOUNT_BARRIER;
198 mp->m_flags |= XFS_MOUNT_COMPAT_IOSIZE;
199 mp->m_flags |= XFS_MOUNT_SMALL_INUMS;
200
201 /*
202 * These can be overridden by the mount option parsing.
203 */
204 mp->m_logbufs = -1;
205 mp->m_logbsize = -1;
206
207 if (!options)
208 goto done;
209
210 while ((this_char = strsep(&options, ",")) != NULL) {
211 if (!*this_char)
212 continue;
213 if ((value = strchr(this_char, '=')) != NULL)
214 *value++ = 0;
215
216 if (!strcmp(this_char, MNTOPT_LOGBUFS)) {
217 if (!value || !*value) {
218 cmn_err(CE_WARN,
219 "XFS: %s option requires an argument",
220 this_char);
221 return EINVAL;
222 }
223 mp->m_logbufs = simple_strtoul(value, &eov, 10);
224 } else if (!strcmp(this_char, MNTOPT_LOGBSIZE)) {
225 if (!value || !*value) {
226 cmn_err(CE_WARN,
227 "XFS: %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 cmn_err(CE_WARN,
235 "XFS: %s option requires an argument",
236 this_char);
237 return EINVAL;
238 }
239 mp->m_logname = kstrndup(value, MAXNAMELEN, GFP_KERNEL);
240 if (!mp->m_logname)
241 return ENOMEM;
242 } else if (!strcmp(this_char, MNTOPT_MTPT)) {
243 if (!value || !*value) {
244 cmn_err(CE_WARN,
245 "XFS: %s option requires an argument",
246 this_char);
247 return EINVAL;
248 }
249 *mtpt = kstrndup(value, MAXNAMELEN, GFP_KERNEL);
250 if (!*mtpt)
251 return ENOMEM;
252 } else if (!strcmp(this_char, MNTOPT_RTDEV)) {
253 if (!value || !*value) {
254 cmn_err(CE_WARN,
255 "XFS: %s option requires an argument",
256 this_char);
257 return EINVAL;
258 }
259 mp->m_rtname = kstrndup(value, MAXNAMELEN, GFP_KERNEL);
260 if (!mp->m_rtname)
261 return ENOMEM;
262 } else if (!strcmp(this_char, MNTOPT_BIOSIZE)) {
263 if (!value || !*value) {
264 cmn_err(CE_WARN,
265 "XFS: %s option requires an argument",
266 this_char);
267 return EINVAL;
268 }
269 iosize = simple_strtoul(value, &eov, 10);
270 iosizelog = ffs(iosize) - 1;
271 } else if (!strcmp(this_char, MNTOPT_ALLOCSIZE)) {
272 if (!value || !*value) {
273 cmn_err(CE_WARN,
274 "XFS: %s option requires an argument",
275 this_char);
276 return EINVAL;
277 }
278 iosize = suffix_strtoul(value, &eov, 10);
279 iosizelog = ffs(iosize) - 1;
280 } else if (!strcmp(this_char, MNTOPT_GRPID) ||
281 !strcmp(this_char, MNTOPT_BSDGROUPS)) {
282 mp->m_flags |= XFS_MOUNT_GRPID;
283 } else if (!strcmp(this_char, MNTOPT_NOGRPID) ||
284 !strcmp(this_char, MNTOPT_SYSVGROUPS)) {
285 mp->m_flags &= ~XFS_MOUNT_GRPID;
286 } else if (!strcmp(this_char, MNTOPT_WSYNC)) {
287 mp->m_flags |= XFS_MOUNT_WSYNC;
288 } else if (!strcmp(this_char, MNTOPT_OSYNCISOSYNC)) {
289 mp->m_flags |= XFS_MOUNT_OSYNCISOSYNC;
290 } else if (!strcmp(this_char, MNTOPT_NORECOVERY)) {
291 mp->m_flags |= XFS_MOUNT_NORECOVERY;
292 } else if (!strcmp(this_char, MNTOPT_NOALIGN)) {
293 mp->m_flags |= XFS_MOUNT_NOALIGN;
294 } else if (!strcmp(this_char, MNTOPT_SWALLOC)) {
295 mp->m_flags |= XFS_MOUNT_SWALLOC;
296 } else if (!strcmp(this_char, MNTOPT_SUNIT)) {
297 if (!value || !*value) {
298 cmn_err(CE_WARN,
299 "XFS: %s option requires an argument",
300 this_char);
301 return EINVAL;
302 }
303 dsunit = simple_strtoul(value, &eov, 10);
304 } else if (!strcmp(this_char, MNTOPT_SWIDTH)) {
305 if (!value || !*value) {
306 cmn_err(CE_WARN,
307 "XFS: %s option requires an argument",
308 this_char);
309 return EINVAL;
310 }
311 dswidth = simple_strtoul(value, &eov, 10);
312 } else if (!strcmp(this_char, MNTOPT_64BITINODE)) {
313 mp->m_flags &= ~XFS_MOUNT_SMALL_INUMS;
314 #if !XFS_BIG_INUMS
315 cmn_err(CE_WARN,
316 "XFS: %s option not allowed on this system",
317 this_char);
318 return EINVAL;
319 #endif
320 } else if (!strcmp(this_char, MNTOPT_NOUUID)) {
321 mp->m_flags |= XFS_MOUNT_NOUUID;
322 } else if (!strcmp(this_char, MNTOPT_BARRIER)) {
323 mp->m_flags |= XFS_MOUNT_BARRIER;
324 } else if (!strcmp(this_char, MNTOPT_NOBARRIER)) {
325 mp->m_flags &= ~XFS_MOUNT_BARRIER;
326 } else if (!strcmp(this_char, MNTOPT_IKEEP)) {
327 mp->m_flags |= XFS_MOUNT_IKEEP;
328 } else if (!strcmp(this_char, MNTOPT_NOIKEEP)) {
329 dmapi_implies_ikeep = 0;
330 mp->m_flags &= ~XFS_MOUNT_IKEEP;
331 } else if (!strcmp(this_char, MNTOPT_LARGEIO)) {
332 mp->m_flags &= ~XFS_MOUNT_COMPAT_IOSIZE;
333 } else if (!strcmp(this_char, MNTOPT_NOLARGEIO)) {
334 mp->m_flags |= XFS_MOUNT_COMPAT_IOSIZE;
335 } else if (!strcmp(this_char, MNTOPT_ATTR2)) {
336 mp->m_flags |= XFS_MOUNT_ATTR2;
337 } else if (!strcmp(this_char, MNTOPT_NOATTR2)) {
338 mp->m_flags &= ~XFS_MOUNT_ATTR2;
339 mp->m_flags |= XFS_MOUNT_NOATTR2;
340 } else if (!strcmp(this_char, MNTOPT_FILESTREAM)) {
341 mp->m_flags |= XFS_MOUNT_FILESTREAMS;
342 } else if (!strcmp(this_char, MNTOPT_NOQUOTA)) {
343 mp->m_qflags &= ~(XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE |
344 XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE |
345 XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE |
346 XFS_UQUOTA_ENFD | XFS_OQUOTA_ENFD);
347 } else if (!strcmp(this_char, MNTOPT_QUOTA) ||
348 !strcmp(this_char, MNTOPT_UQUOTA) ||
349 !strcmp(this_char, MNTOPT_USRQUOTA)) {
350 mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE |
351 XFS_UQUOTA_ENFD);
352 } else if (!strcmp(this_char, MNTOPT_QUOTANOENF) ||
353 !strcmp(this_char, MNTOPT_UQUOTANOENF)) {
354 mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE);
355 mp->m_qflags &= ~XFS_UQUOTA_ENFD;
356 } else if (!strcmp(this_char, MNTOPT_PQUOTA) ||
357 !strcmp(this_char, MNTOPT_PRJQUOTA)) {
358 mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE |
359 XFS_OQUOTA_ENFD);
360 } else if (!strcmp(this_char, MNTOPT_PQUOTANOENF)) {
361 mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE);
362 mp->m_qflags &= ~XFS_OQUOTA_ENFD;
363 } else if (!strcmp(this_char, MNTOPT_GQUOTA) ||
364 !strcmp(this_char, MNTOPT_GRPQUOTA)) {
365 mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE |
366 XFS_OQUOTA_ENFD);
367 } else if (!strcmp(this_char, MNTOPT_GQUOTANOENF)) {
368 mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE);
369 mp->m_qflags &= ~XFS_OQUOTA_ENFD;
370 } else if (!strcmp(this_char, MNTOPT_DMAPI)) {
371 mp->m_flags |= XFS_MOUNT_DMAPI;
372 } else if (!strcmp(this_char, MNTOPT_XDSM)) {
373 mp->m_flags |= XFS_MOUNT_DMAPI;
374 } else if (!strcmp(this_char, MNTOPT_DMI)) {
375 mp->m_flags |= XFS_MOUNT_DMAPI;
376 } else if (!strcmp(this_char, "ihashsize")) {
377 cmn_err(CE_WARN,
378 "XFS: ihashsize no longer used, option is deprecated.");
379 } else if (!strcmp(this_char, "osyncisdsync")) {
380 /* no-op, this is now the default */
381 cmn_err(CE_WARN,
382 "XFS: osyncisdsync is now the default, option is deprecated.");
383 } else if (!strcmp(this_char, "irixsgid")) {
384 cmn_err(CE_WARN,
385 "XFS: irixsgid is now a sysctl(2) variable, option is deprecated.");
386 } else {
387 cmn_err(CE_WARN,
388 "XFS: unknown mount option [%s].", this_char);
389 return EINVAL;
390 }
391 }
392
393 /*
394 * no recovery flag requires a read-only mount
395 */
396 if ((mp->m_flags & XFS_MOUNT_NORECOVERY) &&
397 !(mp->m_flags & XFS_MOUNT_RDONLY)) {
398 cmn_err(CE_WARN, "XFS: no-recovery mounts must be read-only.");
399 return EINVAL;
400 }
401
402 if ((mp->m_flags & XFS_MOUNT_NOALIGN) && (dsunit || dswidth)) {
403 cmn_err(CE_WARN,
404 "XFS: sunit and swidth options incompatible with the noalign option");
405 return EINVAL;
406 }
407
408 #ifndef CONFIG_XFS_QUOTA
409 if (XFS_IS_QUOTA_RUNNING(mp)) {
410 cmn_err(CE_WARN,
411 "XFS: quota support not available in this kernel.");
412 return EINVAL;
413 }
414 #endif
415
416 if ((mp->m_qflags & (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE)) &&
417 (mp->m_qflags & (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE))) {
418 cmn_err(CE_WARN,
419 "XFS: cannot mount with both project and group quota");
420 return EINVAL;
421 }
422
423 if ((mp->m_flags & XFS_MOUNT_DMAPI) && (!*mtpt || *mtpt[0] == '\0')) {
424 printk("XFS: %s option needs the mount point option as well\n",
425 MNTOPT_DMAPI);
426 return EINVAL;
427 }
428
429 if ((dsunit && !dswidth) || (!dsunit && dswidth)) {
430 cmn_err(CE_WARN,
431 "XFS: sunit and swidth must be specified together");
432 return EINVAL;
433 }
434
435 if (dsunit && (dswidth % dsunit != 0)) {
436 cmn_err(CE_WARN,
437 "XFS: stripe width (%d) must be a multiple of the stripe unit (%d)",
438 dswidth, dsunit);
439 return EINVAL;
440 }
441
442 /*
443 * Applications using DMI filesystems often expect the
444 * inode generation number to be monotonically increasing.
445 * If we delete inode chunks we break this assumption, so
446 * keep unused inode chunks on disk for DMI filesystems
447 * until we come up with a better solution.
448 * Note that if "ikeep" or "noikeep" mount options are
449 * supplied, then they are honored.
450 */
451 if ((mp->m_flags & XFS_MOUNT_DMAPI) && dmapi_implies_ikeep)
452 mp->m_flags |= XFS_MOUNT_IKEEP;
453
454 done:
455 if (!(mp->m_flags & XFS_MOUNT_NOALIGN)) {
456 /*
457 * At this point the superblock has not been read
458 * in, therefore we do not know the block size.
459 * Before the mount call ends we will convert
460 * these to FSBs.
461 */
462 if (dsunit) {
463 mp->m_dalign = dsunit;
464 mp->m_flags |= XFS_MOUNT_RETERR;
465 }
466
467 if (dswidth)
468 mp->m_swidth = dswidth;
469 }
470
471 if (mp->m_logbufs != -1 &&
472 mp->m_logbufs != 0 &&
473 (mp->m_logbufs < XLOG_MIN_ICLOGS ||
474 mp->m_logbufs > XLOG_MAX_ICLOGS)) {
475 cmn_err(CE_WARN,
476 "XFS: invalid logbufs value: %d [not %d-%d]",
477 mp->m_logbufs, XLOG_MIN_ICLOGS, XLOG_MAX_ICLOGS);
478 return XFS_ERROR(EINVAL);
479 }
480 if (mp->m_logbsize != -1 &&
481 mp->m_logbsize != 0 &&
482 (mp->m_logbsize < XLOG_MIN_RECORD_BSIZE ||
483 mp->m_logbsize > XLOG_MAX_RECORD_BSIZE ||
484 !is_power_of_2(mp->m_logbsize))) {
485 cmn_err(CE_WARN,
486 "XFS: invalid logbufsize: %d [not 16k,32k,64k,128k or 256k]",
487 mp->m_logbsize);
488 return XFS_ERROR(EINVAL);
489 }
490
491 mp->m_fsname = kstrndup(sb->s_id, MAXNAMELEN, GFP_KERNEL);
492 if (!mp->m_fsname)
493 return ENOMEM;
494 mp->m_fsname_len = strlen(mp->m_fsname) + 1;
495
496 if (iosizelog) {
497 if (iosizelog > XFS_MAX_IO_LOG ||
498 iosizelog < XFS_MIN_IO_LOG) {
499 cmn_err(CE_WARN,
500 "XFS: invalid log iosize: %d [not %d-%d]",
501 iosizelog, XFS_MIN_IO_LOG,
502 XFS_MAX_IO_LOG);
503 return XFS_ERROR(EINVAL);
504 }
505
506 mp->m_flags |= XFS_MOUNT_DFLT_IOSIZE;
507 mp->m_readio_log = iosizelog;
508 mp->m_writeio_log = iosizelog;
509 }
510
511 return 0;
512 }
513
514 struct proc_xfs_info {
515 int flag;
516 char *str;
517 };
518
519 STATIC int
520 xfs_showargs(
521 struct xfs_mount *mp,
522 struct seq_file *m)
523 {
524 static struct proc_xfs_info xfs_info_set[] = {
525 /* the few simple ones we can get from the mount struct */
526 { XFS_MOUNT_IKEEP, "," MNTOPT_IKEEP },
527 { XFS_MOUNT_WSYNC, "," MNTOPT_WSYNC },
528 { XFS_MOUNT_NOALIGN, "," MNTOPT_NOALIGN },
529 { XFS_MOUNT_SWALLOC, "," MNTOPT_SWALLOC },
530 { XFS_MOUNT_NOUUID, "," MNTOPT_NOUUID },
531 { XFS_MOUNT_NORECOVERY, "," MNTOPT_NORECOVERY },
532 { XFS_MOUNT_OSYNCISOSYNC, "," MNTOPT_OSYNCISOSYNC },
533 { XFS_MOUNT_ATTR2, "," MNTOPT_ATTR2 },
534 { XFS_MOUNT_FILESTREAMS, "," MNTOPT_FILESTREAM },
535 { XFS_MOUNT_DMAPI, "," MNTOPT_DMAPI },
536 { XFS_MOUNT_GRPID, "," MNTOPT_GRPID },
537 { 0, NULL }
538 };
539 static struct proc_xfs_info xfs_info_unset[] = {
540 /* the few simple ones we can get from the mount struct */
541 { XFS_MOUNT_COMPAT_IOSIZE, "," MNTOPT_LARGEIO },
542 { XFS_MOUNT_BARRIER, "," MNTOPT_NOBARRIER },
543 { XFS_MOUNT_SMALL_INUMS, "," MNTOPT_64BITINODE },
544 { 0, NULL }
545 };
546 struct proc_xfs_info *xfs_infop;
547
548 for (xfs_infop = xfs_info_set; xfs_infop->flag; xfs_infop++) {
549 if (mp->m_flags & xfs_infop->flag)
550 seq_puts(m, xfs_infop->str);
551 }
552 for (xfs_infop = xfs_info_unset; xfs_infop->flag; xfs_infop++) {
553 if (!(mp->m_flags & xfs_infop->flag))
554 seq_puts(m, xfs_infop->str);
555 }
556
557 if (mp->m_flags & XFS_MOUNT_DFLT_IOSIZE)
558 seq_printf(m, "," MNTOPT_ALLOCSIZE "=%dk",
559 (int)(1 << mp->m_writeio_log) >> 10);
560
561 if (mp->m_logbufs > 0)
562 seq_printf(m, "," MNTOPT_LOGBUFS "=%d", mp->m_logbufs);
563 if (mp->m_logbsize > 0)
564 seq_printf(m, "," MNTOPT_LOGBSIZE "=%dk", mp->m_logbsize >> 10);
565
566 if (mp->m_logname)
567 seq_printf(m, "," MNTOPT_LOGDEV "=%s", mp->m_logname);
568 if (mp->m_rtname)
569 seq_printf(m, "," MNTOPT_RTDEV "=%s", mp->m_rtname);
570
571 if (mp->m_dalign > 0)
572 seq_printf(m, "," MNTOPT_SUNIT "=%d",
573 (int)XFS_FSB_TO_BB(mp, mp->m_dalign));
574 if (mp->m_swidth > 0)
575 seq_printf(m, "," MNTOPT_SWIDTH "=%d",
576 (int)XFS_FSB_TO_BB(mp, mp->m_swidth));
577
578 if (mp->m_qflags & (XFS_UQUOTA_ACCT|XFS_UQUOTA_ENFD))
579 seq_puts(m, "," MNTOPT_USRQUOTA);
580 else if (mp->m_qflags & XFS_UQUOTA_ACCT)
581 seq_puts(m, "," MNTOPT_UQUOTANOENF);
582
583 if (mp->m_qflags & (XFS_PQUOTA_ACCT|XFS_OQUOTA_ENFD))
584 seq_puts(m, "," MNTOPT_PRJQUOTA);
585 else if (mp->m_qflags & XFS_PQUOTA_ACCT)
586 seq_puts(m, "," MNTOPT_PQUOTANOENF);
587
588 if (mp->m_qflags & (XFS_GQUOTA_ACCT|XFS_OQUOTA_ENFD))
589 seq_puts(m, "," MNTOPT_GRPQUOTA);
590 else if (mp->m_qflags & XFS_GQUOTA_ACCT)
591 seq_puts(m, "," MNTOPT_GQUOTANOENF);
592
593 if (!(mp->m_qflags & XFS_ALL_QUOTA_ACCT))
594 seq_puts(m, "," MNTOPT_NOQUOTA);
595
596 return 0;
597 }
598 __uint64_t
599 xfs_max_file_offset(
600 unsigned int blockshift)
601 {
602 unsigned int pagefactor = 1;
603 unsigned int bitshift = BITS_PER_LONG - 1;
604
605 /* Figure out maximum filesize, on Linux this can depend on
606 * the filesystem blocksize (on 32 bit platforms).
607 * __block_prepare_write does this in an [unsigned] long...
608 * page->index << (PAGE_CACHE_SHIFT - bbits)
609 * So, for page sized blocks (4K on 32 bit platforms),
610 * this wraps at around 8Tb (hence MAX_LFS_FILESIZE which is
611 * (((u64)PAGE_CACHE_SIZE << (BITS_PER_LONG-1))-1)
612 * but for smaller blocksizes it is less (bbits = log2 bsize).
613 * Note1: get_block_t takes a long (implicit cast from above)
614 * Note2: The Large Block Device (LBD and HAVE_SECTOR_T) patch
615 * can optionally convert the [unsigned] long from above into
616 * an [unsigned] long long.
617 */
618
619 #if BITS_PER_LONG == 32
620 # if defined(CONFIG_LBD)
621 ASSERT(sizeof(sector_t) == 8);
622 pagefactor = PAGE_CACHE_SIZE;
623 bitshift = BITS_PER_LONG;
624 # else
625 pagefactor = PAGE_CACHE_SIZE >> (PAGE_CACHE_SHIFT - blockshift);
626 # endif
627 #endif
628
629 return (((__uint64_t)pagefactor) << bitshift) - 1;
630 }
631
632 STATIC int
633 xfs_blkdev_get(
634 xfs_mount_t *mp,
635 const char *name,
636 struct block_device **bdevp)
637 {
638 int error = 0;
639
640 *bdevp = open_bdev_exclusive(name, FMODE_READ|FMODE_WRITE, mp);
641 if (IS_ERR(*bdevp)) {
642 error = PTR_ERR(*bdevp);
643 printk("XFS: Invalid device [%s], error=%d\n", name, error);
644 }
645
646 return -error;
647 }
648
649 STATIC void
650 xfs_blkdev_put(
651 struct block_device *bdev)
652 {
653 if (bdev)
654 close_bdev_exclusive(bdev, FMODE_READ|FMODE_WRITE);
655 }
656
657 /*
658 * Try to write out the superblock using barriers.
659 */
660 STATIC int
661 xfs_barrier_test(
662 xfs_mount_t *mp)
663 {
664 xfs_buf_t *sbp = xfs_getsb(mp, 0);
665 int error;
666
667 XFS_BUF_UNDONE(sbp);
668 XFS_BUF_UNREAD(sbp);
669 XFS_BUF_UNDELAYWRITE(sbp);
670 XFS_BUF_WRITE(sbp);
671 XFS_BUF_UNASYNC(sbp);
672 XFS_BUF_ORDERED(sbp);
673
674 xfsbdstrat(mp, sbp);
675 error = xfs_iowait(sbp);
676
677 /*
678 * Clear all the flags we set and possible error state in the
679 * buffer. We only did the write to try out whether barriers
680 * worked and shouldn't leave any traces in the superblock
681 * buffer.
682 */
683 XFS_BUF_DONE(sbp);
684 XFS_BUF_ERROR(sbp, 0);
685 XFS_BUF_UNORDERED(sbp);
686
687 xfs_buf_relse(sbp);
688 return error;
689 }
690
691 void
692 xfs_mountfs_check_barriers(xfs_mount_t *mp)
693 {
694 int error;
695
696 if (mp->m_logdev_targp != mp->m_ddev_targp) {
697 xfs_fs_cmn_err(CE_NOTE, mp,
698 "Disabling barriers, not supported with external log device");
699 mp->m_flags &= ~XFS_MOUNT_BARRIER;
700 return;
701 }
702
703 if (xfs_readonly_buftarg(mp->m_ddev_targp)) {
704 xfs_fs_cmn_err(CE_NOTE, mp,
705 "Disabling barriers, underlying device is readonly");
706 mp->m_flags &= ~XFS_MOUNT_BARRIER;
707 return;
708 }
709
710 error = xfs_barrier_test(mp);
711 if (error) {
712 xfs_fs_cmn_err(CE_NOTE, mp,
713 "Disabling barriers, trial barrier write failed");
714 mp->m_flags &= ~XFS_MOUNT_BARRIER;
715 return;
716 }
717 }
718
719 void
720 xfs_blkdev_issue_flush(
721 xfs_buftarg_t *buftarg)
722 {
723 blkdev_issue_flush(buftarg->bt_bdev, NULL);
724 }
725
726 STATIC void
727 xfs_close_devices(
728 struct xfs_mount *mp)
729 {
730 if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp) {
731 struct block_device *logdev = mp->m_logdev_targp->bt_bdev;
732 xfs_free_buftarg(mp, mp->m_logdev_targp);
733 xfs_blkdev_put(logdev);
734 }
735 if (mp->m_rtdev_targp) {
736 struct block_device *rtdev = mp->m_rtdev_targp->bt_bdev;
737 xfs_free_buftarg(mp, mp->m_rtdev_targp);
738 xfs_blkdev_put(rtdev);
739 }
740 xfs_free_buftarg(mp, mp->m_ddev_targp);
741 }
742
743 /*
744 * The file system configurations are:
745 * (1) device (partition) with data and internal log
746 * (2) logical volume with data and log subvolumes.
747 * (3) logical volume with data, log, and realtime subvolumes.
748 *
749 * We only have to handle opening the log and realtime volumes here if
750 * they are present. The data subvolume has already been opened by
751 * get_sb_bdev() and is stored in sb->s_bdev.
752 */
753 STATIC int
754 xfs_open_devices(
755 struct xfs_mount *mp)
756 {
757 struct block_device *ddev = mp->m_super->s_bdev;
758 struct block_device *logdev = NULL, *rtdev = NULL;
759 int error;
760
761 /*
762 * Open real time and log devices - order is important.
763 */
764 if (mp->m_logname) {
765 error = xfs_blkdev_get(mp, mp->m_logname, &logdev);
766 if (error)
767 goto out;
768 }
769
770 if (mp->m_rtname) {
771 error = xfs_blkdev_get(mp, mp->m_rtname, &rtdev);
772 if (error)
773 goto out_close_logdev;
774
775 if (rtdev == ddev || rtdev == logdev) {
776 cmn_err(CE_WARN,
777 "XFS: Cannot mount filesystem with identical rtdev and ddev/logdev.");
778 error = EINVAL;
779 goto out_close_rtdev;
780 }
781 }
782
783 /*
784 * Setup xfs_mount buffer target pointers
785 */
786 error = ENOMEM;
787 mp->m_ddev_targp = xfs_alloc_buftarg(ddev, 0);
788 if (!mp->m_ddev_targp)
789 goto out_close_rtdev;
790
791 if (rtdev) {
792 mp->m_rtdev_targp = xfs_alloc_buftarg(rtdev, 1);
793 if (!mp->m_rtdev_targp)
794 goto out_free_ddev_targ;
795 }
796
797 if (logdev && logdev != ddev) {
798 mp->m_logdev_targp = xfs_alloc_buftarg(logdev, 1);
799 if (!mp->m_logdev_targp)
800 goto out_free_rtdev_targ;
801 } else {
802 mp->m_logdev_targp = mp->m_ddev_targp;
803 }
804
805 return 0;
806
807 out_free_rtdev_targ:
808 if (mp->m_rtdev_targp)
809 xfs_free_buftarg(mp, mp->m_rtdev_targp);
810 out_free_ddev_targ:
811 xfs_free_buftarg(mp, mp->m_ddev_targp);
812 out_close_rtdev:
813 if (rtdev)
814 xfs_blkdev_put(rtdev);
815 out_close_logdev:
816 if (logdev && logdev != ddev)
817 xfs_blkdev_put(logdev);
818 out:
819 return error;
820 }
821
822 /*
823 * Setup xfs_mount buffer target pointers based on superblock
824 */
825 STATIC int
826 xfs_setup_devices(
827 struct xfs_mount *mp)
828 {
829 int error;
830
831 error = xfs_setsize_buftarg(mp->m_ddev_targp, mp->m_sb.sb_blocksize,
832 mp->m_sb.sb_sectsize);
833 if (error)
834 return error;
835
836 if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp) {
837 unsigned int log_sector_size = BBSIZE;
838
839 if (xfs_sb_version_hassector(&mp->m_sb))
840 log_sector_size = mp->m_sb.sb_logsectsize;
841 error = xfs_setsize_buftarg(mp->m_logdev_targp,
842 mp->m_sb.sb_blocksize,
843 log_sector_size);
844 if (error)
845 return error;
846 }
847 if (mp->m_rtdev_targp) {
848 error = xfs_setsize_buftarg(mp->m_rtdev_targp,
849 mp->m_sb.sb_blocksize,
850 mp->m_sb.sb_sectsize);
851 if (error)
852 return error;
853 }
854
855 return 0;
856 }
857
858 /*
859 * XFS AIL push thread support
860 */
861 void
862 xfsaild_wakeup(
863 struct xfs_ail *ailp,
864 xfs_lsn_t threshold_lsn)
865 {
866 ailp->xa_target = threshold_lsn;
867 wake_up_process(ailp->xa_task);
868 }
869
870 STATIC int
871 xfsaild(
872 void *data)
873 {
874 struct xfs_ail *ailp = data;
875 xfs_lsn_t last_pushed_lsn = 0;
876 long tout = 0;
877
878 while (!kthread_should_stop()) {
879 if (tout)
880 schedule_timeout_interruptible(msecs_to_jiffies(tout));
881 tout = 1000;
882
883 /* swsusp */
884 try_to_freeze();
885
886 ASSERT(ailp->xa_mount->m_log);
887 if (XFS_FORCED_SHUTDOWN(ailp->xa_mount))
888 continue;
889
890 tout = xfsaild_push(ailp, &last_pushed_lsn);
891 }
892
893 return 0;
894 } /* xfsaild */
895
896 int
897 xfsaild_start(
898 struct xfs_ail *ailp)
899 {
900 ailp->xa_target = 0;
901 ailp->xa_task = kthread_run(xfsaild, ailp, "xfsaild");
902 if (IS_ERR(ailp->xa_task))
903 return -PTR_ERR(ailp->xa_task);
904 return 0;
905 }
906
907 void
908 xfsaild_stop(
909 struct xfs_ail *ailp)
910 {
911 kthread_stop(ailp->xa_task);
912 }
913
914
915 /* Catch misguided souls that try to use this interface on XFS */
916 STATIC struct inode *
917 xfs_fs_alloc_inode(
918 struct super_block *sb)
919 {
920 BUG();
921 return NULL;
922 }
923
924 /*
925 * Now that the generic code is guaranteed not to be accessing
926 * the linux inode, we can reclaim the inode.
927 */
928 STATIC void
929 xfs_fs_destroy_inode(
930 struct inode *inode)
931 {
932 xfs_inode_t *ip = XFS_I(inode);
933
934 XFS_STATS_INC(vn_reclaim);
935 if (xfs_reclaim(ip))
936 panic("%s: cannot reclaim 0x%p\n", __func__, inode);
937 }
938
939 /*
940 * Slab object creation initialisation for the XFS inode.
941 * This covers only the idempotent fields in the XFS inode;
942 * all other fields need to be initialised on allocation
943 * from the slab. This avoids the need to repeatedly intialise
944 * fields in the xfs inode that left in the initialise state
945 * when freeing the inode.
946 */
947 STATIC void
948 xfs_fs_inode_init_once(
949 void *inode)
950 {
951 struct xfs_inode *ip = inode;
952
953 memset(ip, 0, sizeof(struct xfs_inode));
954
955 /* vfs inode */
956 inode_init_once(VFS_I(ip));
957
958 /* xfs inode */
959 atomic_set(&ip->i_iocount, 0);
960 atomic_set(&ip->i_pincount, 0);
961 spin_lock_init(&ip->i_flags_lock);
962 init_waitqueue_head(&ip->i_ipin_wait);
963 /*
964 * Because we want to use a counting completion, complete
965 * the flush completion once to allow a single access to
966 * the flush completion without blocking.
967 */
968 init_completion(&ip->i_flush);
969 complete(&ip->i_flush);
970
971 mrlock_init(&ip->i_lock, MRLOCK_ALLOW_EQUAL_PRI|MRLOCK_BARRIER,
972 "xfsino", ip->i_ino);
973 mrlock_init(&ip->i_iolock, MRLOCK_BARRIER, "xfsio", ip->i_ino);
974 }
975
976 /*
977 * Attempt to flush the inode, this will actually fail
978 * if the inode is pinned, but we dirty the inode again
979 * at the point when it is unpinned after a log write,
980 * since this is when the inode itself becomes flushable.
981 */
982 STATIC int
983 xfs_fs_write_inode(
984 struct inode *inode,
985 int sync)
986 {
987 struct xfs_inode *ip = XFS_I(inode);
988 struct xfs_mount *mp = ip->i_mount;
989 int error = 0;
990
991 xfs_itrace_entry(ip);
992
993 if (XFS_FORCED_SHUTDOWN(mp))
994 return XFS_ERROR(EIO);
995
996 if (sync) {
997 error = xfs_wait_on_pages(ip, 0, -1);
998 if (error)
999 goto out;
1000 }
1001
1002 /*
1003 * Bypass inodes which have already been cleaned by
1004 * the inode flush clustering code inside xfs_iflush
1005 */
1006 if (xfs_inode_clean(ip))
1007 goto out;
1008
1009 /*
1010 * We make this non-blocking if the inode is contended, return
1011 * EAGAIN to indicate to the caller that they did not succeed.
1012 * This prevents the flush path from blocking on inodes inside
1013 * another operation right now, they get caught later by xfs_sync.
1014 */
1015 if (sync) {
1016 xfs_ilock(ip, XFS_ILOCK_SHARED);
1017 xfs_iflock(ip);
1018
1019 error = xfs_iflush(ip, XFS_IFLUSH_SYNC);
1020 } else {
1021 error = EAGAIN;
1022 if (!xfs_ilock_nowait(ip, XFS_ILOCK_SHARED))
1023 goto out;
1024 if (xfs_ipincount(ip) || !xfs_iflock_nowait(ip))
1025 goto out_unlock;
1026
1027 error = xfs_iflush(ip, XFS_IFLUSH_ASYNC_NOBLOCK);
1028 }
1029
1030 out_unlock:
1031 xfs_iunlock(ip, XFS_ILOCK_SHARED);
1032 out:
1033 /*
1034 * if we failed to write out the inode then mark
1035 * it dirty again so we'll try again later.
1036 */
1037 if (error)
1038 xfs_mark_inode_dirty_sync(ip);
1039 return -error;
1040 }
1041
1042 STATIC void
1043 xfs_fs_clear_inode(
1044 struct inode *inode)
1045 {
1046 xfs_inode_t *ip = XFS_I(inode);
1047
1048 xfs_itrace_entry(ip);
1049 XFS_STATS_INC(vn_rele);
1050 XFS_STATS_INC(vn_remove);
1051 XFS_STATS_DEC(vn_active);
1052
1053 xfs_inactive(ip);
1054 }
1055
1056 STATIC void
1057 xfs_free_fsname(
1058 struct xfs_mount *mp)
1059 {
1060 kfree(mp->m_fsname);
1061 kfree(mp->m_rtname);
1062 kfree(mp->m_logname);
1063 }
1064
1065 STATIC void
1066 xfs_fs_put_super(
1067 struct super_block *sb)
1068 {
1069 struct xfs_mount *mp = XFS_M(sb);
1070 struct xfs_inode *rip = mp->m_rootip;
1071 int unmount_event_flags = 0;
1072
1073 xfs_syncd_stop(mp);
1074 xfs_sync_inodes(mp, SYNC_ATTR|SYNC_DELWRI);
1075
1076 #ifdef HAVE_DMAPI
1077 if (mp->m_flags & XFS_MOUNT_DMAPI) {
1078 unmount_event_flags =
1079 (mp->m_dmevmask & (1 << DM_EVENT_UNMOUNT)) ?
1080 0 : DM_FLAGS_UNWANTED;
1081 /*
1082 * Ignore error from dmapi here, first unmount is not allowed
1083 * to fail anyway, and second we wouldn't want to fail a
1084 * unmount because of dmapi.
1085 */
1086 XFS_SEND_PREUNMOUNT(mp, rip, DM_RIGHT_NULL, rip, DM_RIGHT_NULL,
1087 NULL, NULL, 0, 0, unmount_event_flags);
1088 }
1089 #endif
1090
1091 /*
1092 * Blow away any referenced inode in the filestreams cache.
1093 * This can and will cause log traffic as inodes go inactive
1094 * here.
1095 */
1096 xfs_filestream_unmount(mp);
1097
1098 XFS_bflush(mp->m_ddev_targp);
1099
1100 if (mp->m_flags & XFS_MOUNT_DMAPI) {
1101 XFS_SEND_UNMOUNT(mp, rip, DM_RIGHT_NULL, 0, 0,
1102 unmount_event_flags);
1103 }
1104
1105 xfs_unmountfs(mp);
1106 xfs_freesb(mp);
1107 xfs_icsb_destroy_counters(mp);
1108 xfs_close_devices(mp);
1109 xfs_dmops_put(mp);
1110 xfs_free_fsname(mp);
1111 kfree(mp);
1112 }
1113
1114 STATIC void
1115 xfs_fs_write_super(
1116 struct super_block *sb)
1117 {
1118 if (!(sb->s_flags & MS_RDONLY))
1119 xfs_sync_fsdata(XFS_M(sb), 0);
1120 sb->s_dirt = 0;
1121 }
1122
1123 STATIC int
1124 xfs_fs_sync_super(
1125 struct super_block *sb,
1126 int wait)
1127 {
1128 struct xfs_mount *mp = XFS_M(sb);
1129 int error;
1130
1131 /*
1132 * Treat a sync operation like a freeze. This is to work
1133 * around a race in sync_inodes() which works in two phases
1134 * - an asynchronous flush, which can write out an inode
1135 * without waiting for file size updates to complete, and a
1136 * synchronous flush, which wont do anything because the
1137 * async flush removed the inode's dirty flag. Also
1138 * sync_inodes() will not see any files that just have
1139 * outstanding transactions to be flushed because we don't
1140 * dirty the Linux inode until after the transaction I/O
1141 * completes.
1142 */
1143 if (wait || unlikely(sb->s_frozen == SB_FREEZE_WRITE))
1144 error = xfs_quiesce_data(mp);
1145 else
1146 error = xfs_sync_fsdata(mp, 0);
1147 sb->s_dirt = 0;
1148
1149 if (unlikely(laptop_mode)) {
1150 int prev_sync_seq = mp->m_sync_seq;
1151
1152 /*
1153 * The disk must be active because we're syncing.
1154 * We schedule xfssyncd now (now that the disk is
1155 * active) instead of later (when it might not be).
1156 */
1157 wake_up_process(mp->m_sync_task);
1158 /*
1159 * We have to wait for the sync iteration to complete.
1160 * If we don't, the disk activity caused by the sync
1161 * will come after the sync is completed, and that
1162 * triggers another sync from laptop mode.
1163 */
1164 wait_event(mp->m_wait_single_sync_task,
1165 mp->m_sync_seq != prev_sync_seq);
1166 }
1167
1168 return -error;
1169 }
1170
1171 STATIC int
1172 xfs_fs_statfs(
1173 struct dentry *dentry,
1174 struct kstatfs *statp)
1175 {
1176 struct xfs_mount *mp = XFS_M(dentry->d_sb);
1177 xfs_sb_t *sbp = &mp->m_sb;
1178 struct xfs_inode *ip = XFS_I(dentry->d_inode);
1179 __uint64_t fakeinos, id;
1180 xfs_extlen_t lsize;
1181
1182 statp->f_type = XFS_SB_MAGIC;
1183 statp->f_namelen = MAXNAMELEN - 1;
1184
1185 id = huge_encode_dev(mp->m_ddev_targp->bt_dev);
1186 statp->f_fsid.val[0] = (u32)id;
1187 statp->f_fsid.val[1] = (u32)(id >> 32);
1188
1189 xfs_icsb_sync_counters(mp, XFS_ICSB_LAZY_COUNT);
1190
1191 spin_lock(&mp->m_sb_lock);
1192 statp->f_bsize = sbp->sb_blocksize;
1193 lsize = sbp->sb_logstart ? sbp->sb_logblocks : 0;
1194 statp->f_blocks = sbp->sb_dblocks - lsize;
1195 statp->f_bfree = statp->f_bavail =
1196 sbp->sb_fdblocks - XFS_ALLOC_SET_ASIDE(mp);
1197 fakeinos = statp->f_bfree << sbp->sb_inopblog;
1198 statp->f_files =
1199 MIN(sbp->sb_icount + fakeinos, (__uint64_t)XFS_MAXINUMBER);
1200 if (mp->m_maxicount)
1201 statp->f_files = min_t(typeof(statp->f_files),
1202 statp->f_files,
1203 mp->m_maxicount);
1204 statp->f_ffree = statp->f_files - (sbp->sb_icount - sbp->sb_ifree);
1205 spin_unlock(&mp->m_sb_lock);
1206
1207 if ((ip->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) ||
1208 ((mp->m_qflags & (XFS_PQUOTA_ACCT|XFS_OQUOTA_ENFD))) ==
1209 (XFS_PQUOTA_ACCT|XFS_OQUOTA_ENFD))
1210 xfs_qm_statvfs(ip, statp);
1211 return 0;
1212 }
1213
1214 STATIC int
1215 xfs_fs_remount(
1216 struct super_block *sb,
1217 int *flags,
1218 char *options)
1219 {
1220 struct xfs_mount *mp = XFS_M(sb);
1221 substring_t args[MAX_OPT_ARGS];
1222 char *p;
1223 int error;
1224
1225 while ((p = strsep(&options, ",")) != NULL) {
1226 int token;
1227
1228 if (!*p)
1229 continue;
1230
1231 token = match_token(p, tokens, args);
1232 switch (token) {
1233 case Opt_barrier:
1234 mp->m_flags |= XFS_MOUNT_BARRIER;
1235
1236 /*
1237 * Test if barriers are actually working if we can,
1238 * else delay this check until the filesystem is
1239 * marked writeable.
1240 */
1241 if (!(mp->m_flags & XFS_MOUNT_RDONLY))
1242 xfs_mountfs_check_barriers(mp);
1243 break;
1244 case Opt_nobarrier:
1245 mp->m_flags &= ~XFS_MOUNT_BARRIER;
1246 break;
1247 default:
1248 /*
1249 * Logically we would return an error here to prevent
1250 * users from believing they might have changed
1251 * mount options using remount which can't be changed.
1252 *
1253 * But unfortunately mount(8) adds all options from
1254 * mtab and fstab to the mount arguments in some cases
1255 * so we can't blindly reject options, but have to
1256 * check for each specified option if it actually
1257 * differs from the currently set option and only
1258 * reject it if that's the case.
1259 *
1260 * Until that is implemented we return success for
1261 * every remount request, and silently ignore all
1262 * options that we can't actually change.
1263 */
1264 #if 0
1265 printk(KERN_INFO
1266 "XFS: mount option \"%s\" not supported for remount\n", p);
1267 return -EINVAL;
1268 #else
1269 break;
1270 #endif
1271 }
1272 }
1273
1274 /* ro -> rw */
1275 if ((mp->m_flags & XFS_MOUNT_RDONLY) && !(*flags & MS_RDONLY)) {
1276 mp->m_flags &= ~XFS_MOUNT_RDONLY;
1277 if (mp->m_flags & XFS_MOUNT_BARRIER)
1278 xfs_mountfs_check_barriers(mp);
1279
1280 /*
1281 * If this is the first remount to writeable state we
1282 * might have some superblock changes to update.
1283 */
1284 if (mp->m_update_flags) {
1285 error = xfs_mount_log_sb(mp, mp->m_update_flags);
1286 if (error) {
1287 cmn_err(CE_WARN,
1288 "XFS: failed to write sb changes");
1289 return error;
1290 }
1291 mp->m_update_flags = 0;
1292 }
1293 }
1294
1295 /* rw -> ro */
1296 if (!(mp->m_flags & XFS_MOUNT_RDONLY) && (*flags & MS_RDONLY)) {
1297 xfs_quiesce_data(mp);
1298 xfs_quiesce_attr(mp);
1299 mp->m_flags |= XFS_MOUNT_RDONLY;
1300 }
1301
1302 return 0;
1303 }
1304
1305 /*
1306 * Second stage of a freeze. The data is already frozen so we only
1307 * need to take care of the metadata. Once that's done write a dummy
1308 * record to dirty the log in case of a crash while frozen.
1309 */
1310 STATIC int
1311 xfs_fs_freeze(
1312 struct super_block *sb)
1313 {
1314 struct xfs_mount *mp = XFS_M(sb);
1315
1316 xfs_quiesce_attr(mp);
1317 return -xfs_fs_log_dummy(mp);
1318 }
1319
1320 STATIC int
1321 xfs_fs_show_options(
1322 struct seq_file *m,
1323 struct vfsmount *mnt)
1324 {
1325 return -xfs_showargs(XFS_M(mnt->mnt_sb), m);
1326 }
1327
1328 /*
1329 * This function fills in xfs_mount_t fields based on mount args.
1330 * Note: the superblock _has_ now been read in.
1331 */
1332 STATIC int
1333 xfs_finish_flags(
1334 struct xfs_mount *mp)
1335 {
1336 int ronly = (mp->m_flags & XFS_MOUNT_RDONLY);
1337
1338 /* Fail a mount where the logbuf is smaller than the log stripe */
1339 if (xfs_sb_version_haslogv2(&mp->m_sb)) {
1340 if (mp->m_logbsize <= 0 &&
1341 mp->m_sb.sb_logsunit > XLOG_BIG_RECORD_BSIZE) {
1342 mp->m_logbsize = mp->m_sb.sb_logsunit;
1343 } else if (mp->m_logbsize > 0 &&
1344 mp->m_logbsize < mp->m_sb.sb_logsunit) {
1345 cmn_err(CE_WARN,
1346 "XFS: logbuf size must be greater than or equal to log stripe size");
1347 return XFS_ERROR(EINVAL);
1348 }
1349 } else {
1350 /* Fail a mount if the logbuf is larger than 32K */
1351 if (mp->m_logbsize > XLOG_BIG_RECORD_BSIZE) {
1352 cmn_err(CE_WARN,
1353 "XFS: logbuf size for version 1 logs must be 16K or 32K");
1354 return XFS_ERROR(EINVAL);
1355 }
1356 }
1357
1358 /*
1359 * mkfs'ed attr2 will turn on attr2 mount unless explicitly
1360 * told by noattr2 to turn it off
1361 */
1362 if (xfs_sb_version_hasattr2(&mp->m_sb) &&
1363 !(mp->m_flags & XFS_MOUNT_NOATTR2))
1364 mp->m_flags |= XFS_MOUNT_ATTR2;
1365
1366 /*
1367 * prohibit r/w mounts of read-only filesystems
1368 */
1369 if ((mp->m_sb.sb_flags & XFS_SBF_READONLY) && !ronly) {
1370 cmn_err(CE_WARN,
1371 "XFS: cannot mount a read-only filesystem as read-write");
1372 return XFS_ERROR(EROFS);
1373 }
1374
1375 return 0;
1376 }
1377
1378 STATIC int
1379 xfs_fs_fill_super(
1380 struct super_block *sb,
1381 void *data,
1382 int silent)
1383 {
1384 struct inode *root;
1385 struct xfs_mount *mp = NULL;
1386 int flags = 0, error = ENOMEM;
1387 char *mtpt = NULL;
1388
1389 mp = kzalloc(sizeof(struct xfs_mount), GFP_KERNEL);
1390 if (!mp)
1391 goto out;
1392
1393 spin_lock_init(&mp->m_sb_lock);
1394 mutex_init(&mp->m_growlock);
1395 atomic_set(&mp->m_active_trans, 0);
1396 INIT_LIST_HEAD(&mp->m_sync_list);
1397 spin_lock_init(&mp->m_sync_lock);
1398 init_waitqueue_head(&mp->m_wait_single_sync_task);
1399
1400 mp->m_super = sb;
1401 sb->s_fs_info = mp;
1402
1403 error = xfs_parseargs(mp, (char *)data, &mtpt);
1404 if (error)
1405 goto out_free_fsname;
1406
1407 sb_min_blocksize(sb, BBSIZE);
1408 sb->s_xattr = xfs_xattr_handlers;
1409 sb->s_export_op = &xfs_export_operations;
1410 #ifdef CONFIG_XFS_QUOTA
1411 sb->s_qcop = &xfs_quotactl_operations;
1412 #endif
1413 sb->s_op = &xfs_super_operations;
1414
1415 error = xfs_dmops_get(mp);
1416 if (error)
1417 goto out_free_fsname;
1418
1419 if (silent)
1420 flags |= XFS_MFSI_QUIET;
1421
1422 error = xfs_open_devices(mp);
1423 if (error)
1424 goto out_put_dmops;
1425
1426 if (xfs_icsb_init_counters(mp))
1427 mp->m_flags |= XFS_MOUNT_NO_PERCPU_SB;
1428
1429 error = xfs_readsb(mp, flags);
1430 if (error)
1431 goto out_destroy_counters;
1432
1433 error = xfs_finish_flags(mp);
1434 if (error)
1435 goto out_free_sb;
1436
1437 error = xfs_setup_devices(mp);
1438 if (error)
1439 goto out_free_sb;
1440
1441 if (mp->m_flags & XFS_MOUNT_BARRIER)
1442 xfs_mountfs_check_barriers(mp);
1443
1444 error = xfs_filestream_mount(mp);
1445 if (error)
1446 goto out_free_sb;
1447
1448 error = xfs_mountfs(mp);
1449 if (error)
1450 goto out_filestream_unmount;
1451
1452 XFS_SEND_MOUNT(mp, DM_RIGHT_NULL, mtpt, mp->m_fsname);
1453
1454 sb->s_dirt = 1;
1455 sb->s_magic = XFS_SB_MAGIC;
1456 sb->s_blocksize = mp->m_sb.sb_blocksize;
1457 sb->s_blocksize_bits = ffs(sb->s_blocksize) - 1;
1458 sb->s_maxbytes = xfs_max_file_offset(sb->s_blocksize_bits);
1459 sb->s_time_gran = 1;
1460 set_posix_acl_flag(sb);
1461
1462 root = igrab(VFS_I(mp->m_rootip));
1463 if (!root) {
1464 error = ENOENT;
1465 goto fail_unmount;
1466 }
1467 if (is_bad_inode(root)) {
1468 error = EINVAL;
1469 goto fail_vnrele;
1470 }
1471 sb->s_root = d_alloc_root(root);
1472 if (!sb->s_root) {
1473 error = ENOMEM;
1474 goto fail_vnrele;
1475 }
1476
1477 error = xfs_syncd_init(mp);
1478 if (error)
1479 goto fail_vnrele;
1480
1481 kfree(mtpt);
1482
1483 xfs_itrace_exit(XFS_I(sb->s_root->d_inode));
1484 return 0;
1485
1486 out_filestream_unmount:
1487 xfs_filestream_unmount(mp);
1488 out_free_sb:
1489 xfs_freesb(mp);
1490 out_destroy_counters:
1491 xfs_icsb_destroy_counters(mp);
1492 xfs_close_devices(mp);
1493 out_put_dmops:
1494 xfs_dmops_put(mp);
1495 out_free_fsname:
1496 xfs_free_fsname(mp);
1497 kfree(mtpt);
1498 kfree(mp);
1499 out:
1500 return -error;
1501
1502 fail_vnrele:
1503 if (sb->s_root) {
1504 dput(sb->s_root);
1505 sb->s_root = NULL;
1506 } else {
1507 iput(root);
1508 }
1509
1510 fail_unmount:
1511 /*
1512 * Blow away any referenced inode in the filestreams cache.
1513 * This can and will cause log traffic as inodes go inactive
1514 * here.
1515 */
1516 xfs_filestream_unmount(mp);
1517
1518 XFS_bflush(mp->m_ddev_targp);
1519
1520 xfs_unmountfs(mp);
1521 goto out_free_sb;
1522 }
1523
1524 STATIC int
1525 xfs_fs_get_sb(
1526 struct file_system_type *fs_type,
1527 int flags,
1528 const char *dev_name,
1529 void *data,
1530 struct vfsmount *mnt)
1531 {
1532 return get_sb_bdev(fs_type, flags, dev_name, data, xfs_fs_fill_super,
1533 mnt);
1534 }
1535
1536 static struct super_operations xfs_super_operations = {
1537 .alloc_inode = xfs_fs_alloc_inode,
1538 .destroy_inode = xfs_fs_destroy_inode,
1539 .write_inode = xfs_fs_write_inode,
1540 .clear_inode = xfs_fs_clear_inode,
1541 .put_super = xfs_fs_put_super,
1542 .write_super = xfs_fs_write_super,
1543 .sync_fs = xfs_fs_sync_super,
1544 .freeze_fs = xfs_fs_freeze,
1545 .statfs = xfs_fs_statfs,
1546 .remount_fs = xfs_fs_remount,
1547 .show_options = xfs_fs_show_options,
1548 };
1549
1550 static struct file_system_type xfs_fs_type = {
1551 .owner = THIS_MODULE,
1552 .name = "xfs",
1553 .get_sb = xfs_fs_get_sb,
1554 .kill_sb = kill_block_super,
1555 .fs_flags = FS_REQUIRES_DEV,
1556 };
1557
1558 STATIC int __init
1559 xfs_alloc_trace_bufs(void)
1560 {
1561 #ifdef XFS_ALLOC_TRACE
1562 xfs_alloc_trace_buf = ktrace_alloc(XFS_ALLOC_TRACE_SIZE, KM_MAYFAIL);
1563 if (!xfs_alloc_trace_buf)
1564 goto out;
1565 #endif
1566 #ifdef XFS_BMAP_TRACE
1567 xfs_bmap_trace_buf = ktrace_alloc(XFS_BMAP_TRACE_SIZE, KM_MAYFAIL);
1568 if (!xfs_bmap_trace_buf)
1569 goto out_free_alloc_trace;
1570 #endif
1571 #ifdef XFS_BTREE_TRACE
1572 xfs_allocbt_trace_buf = ktrace_alloc(XFS_ALLOCBT_TRACE_SIZE,
1573 KM_MAYFAIL);
1574 if (!xfs_allocbt_trace_buf)
1575 goto out_free_bmap_trace;
1576
1577 xfs_inobt_trace_buf = ktrace_alloc(XFS_INOBT_TRACE_SIZE, KM_MAYFAIL);
1578 if (!xfs_inobt_trace_buf)
1579 goto out_free_allocbt_trace;
1580
1581 xfs_bmbt_trace_buf = ktrace_alloc(XFS_BMBT_TRACE_SIZE, KM_MAYFAIL);
1582 if (!xfs_bmbt_trace_buf)
1583 goto out_free_inobt_trace;
1584 #endif
1585 #ifdef XFS_ATTR_TRACE
1586 xfs_attr_trace_buf = ktrace_alloc(XFS_ATTR_TRACE_SIZE, KM_MAYFAIL);
1587 if (!xfs_attr_trace_buf)
1588 goto out_free_bmbt_trace;
1589 #endif
1590 #ifdef XFS_DIR2_TRACE
1591 xfs_dir2_trace_buf = ktrace_alloc(XFS_DIR2_GTRACE_SIZE, KM_MAYFAIL);
1592 if (!xfs_dir2_trace_buf)
1593 goto out_free_attr_trace;
1594 #endif
1595
1596 return 0;
1597
1598 #ifdef XFS_DIR2_TRACE
1599 out_free_attr_trace:
1600 #endif
1601 #ifdef XFS_ATTR_TRACE
1602 ktrace_free(xfs_attr_trace_buf);
1603 out_free_bmbt_trace:
1604 #endif
1605 #ifdef XFS_BTREE_TRACE
1606 ktrace_free(xfs_bmbt_trace_buf);
1607 out_free_inobt_trace:
1608 ktrace_free(xfs_inobt_trace_buf);
1609 out_free_allocbt_trace:
1610 ktrace_free(xfs_allocbt_trace_buf);
1611 out_free_bmap_trace:
1612 #endif
1613 #ifdef XFS_BMAP_TRACE
1614 ktrace_free(xfs_bmap_trace_buf);
1615 out_free_alloc_trace:
1616 #endif
1617 #ifdef XFS_ALLOC_TRACE
1618 ktrace_free(xfs_alloc_trace_buf);
1619 out:
1620 #endif
1621 return -ENOMEM;
1622 }
1623
1624 STATIC void
1625 xfs_free_trace_bufs(void)
1626 {
1627 #ifdef XFS_DIR2_TRACE
1628 ktrace_free(xfs_dir2_trace_buf);
1629 #endif
1630 #ifdef XFS_ATTR_TRACE
1631 ktrace_free(xfs_attr_trace_buf);
1632 #endif
1633 #ifdef XFS_BTREE_TRACE
1634 ktrace_free(xfs_bmbt_trace_buf);
1635 ktrace_free(xfs_inobt_trace_buf);
1636 ktrace_free(xfs_allocbt_trace_buf);
1637 #endif
1638 #ifdef XFS_BMAP_TRACE
1639 ktrace_free(xfs_bmap_trace_buf);
1640 #endif
1641 #ifdef XFS_ALLOC_TRACE
1642 ktrace_free(xfs_alloc_trace_buf);
1643 #endif
1644 }
1645
1646 STATIC int __init
1647 xfs_init_zones(void)
1648 {
1649
1650 xfs_ioend_zone = kmem_zone_init(sizeof(xfs_ioend_t), "xfs_ioend");
1651 if (!xfs_ioend_zone)
1652 goto out;
1653
1654 xfs_ioend_pool = mempool_create_slab_pool(4 * MAX_BUF_PER_PAGE,
1655 xfs_ioend_zone);
1656 if (!xfs_ioend_pool)
1657 goto out_destroy_ioend_zone;
1658
1659 xfs_log_ticket_zone = kmem_zone_init(sizeof(xlog_ticket_t),
1660 "xfs_log_ticket");
1661 if (!xfs_log_ticket_zone)
1662 goto out_destroy_ioend_pool;
1663
1664 xfs_bmap_free_item_zone = kmem_zone_init(sizeof(xfs_bmap_free_item_t),
1665 "xfs_bmap_free_item");
1666 if (!xfs_bmap_free_item_zone)
1667 goto out_destroy_log_ticket_zone;
1668
1669 xfs_btree_cur_zone = kmem_zone_init(sizeof(xfs_btree_cur_t),
1670 "xfs_btree_cur");
1671 if (!xfs_btree_cur_zone)
1672 goto out_destroy_bmap_free_item_zone;
1673
1674 xfs_da_state_zone = kmem_zone_init(sizeof(xfs_da_state_t),
1675 "xfs_da_state");
1676 if (!xfs_da_state_zone)
1677 goto out_destroy_btree_cur_zone;
1678
1679 xfs_dabuf_zone = kmem_zone_init(sizeof(xfs_dabuf_t), "xfs_dabuf");
1680 if (!xfs_dabuf_zone)
1681 goto out_destroy_da_state_zone;
1682
1683 xfs_ifork_zone = kmem_zone_init(sizeof(xfs_ifork_t), "xfs_ifork");
1684 if (!xfs_ifork_zone)
1685 goto out_destroy_dabuf_zone;
1686
1687 xfs_trans_zone = kmem_zone_init(sizeof(xfs_trans_t), "xfs_trans");
1688 if (!xfs_trans_zone)
1689 goto out_destroy_ifork_zone;
1690
1691 /*
1692 * The size of the zone allocated buf log item is the maximum
1693 * size possible under XFS. This wastes a little bit of memory,
1694 * but it is much faster.
1695 */
1696 xfs_buf_item_zone = kmem_zone_init((sizeof(xfs_buf_log_item_t) +
1697 (((XFS_MAX_BLOCKSIZE / XFS_BLI_CHUNK) /
1698 NBWORD) * sizeof(int))), "xfs_buf_item");
1699 if (!xfs_buf_item_zone)
1700 goto out_destroy_trans_zone;
1701
1702 xfs_efd_zone = kmem_zone_init((sizeof(xfs_efd_log_item_t) +
1703 ((XFS_EFD_MAX_FAST_EXTENTS - 1) *
1704 sizeof(xfs_extent_t))), "xfs_efd_item");
1705 if (!xfs_efd_zone)
1706 goto out_destroy_buf_item_zone;
1707
1708 xfs_efi_zone = kmem_zone_init((sizeof(xfs_efi_log_item_t) +
1709 ((XFS_EFI_MAX_FAST_EXTENTS - 1) *
1710 sizeof(xfs_extent_t))), "xfs_efi_item");
1711 if (!xfs_efi_zone)
1712 goto out_destroy_efd_zone;
1713
1714 xfs_inode_zone =
1715 kmem_zone_init_flags(sizeof(xfs_inode_t), "xfs_inode",
1716 KM_ZONE_HWALIGN | KM_ZONE_RECLAIM | KM_ZONE_SPREAD,
1717 xfs_fs_inode_init_once);
1718 if (!xfs_inode_zone)
1719 goto out_destroy_efi_zone;
1720
1721 xfs_ili_zone =
1722 kmem_zone_init_flags(sizeof(xfs_inode_log_item_t), "xfs_ili",
1723 KM_ZONE_SPREAD, NULL);
1724 if (!xfs_ili_zone)
1725 goto out_destroy_inode_zone;
1726
1727 #ifdef CONFIG_XFS_POSIX_ACL
1728 xfs_acl_zone = kmem_zone_init(sizeof(xfs_acl_t), "xfs_acl");
1729 if (!xfs_acl_zone)
1730 goto out_destroy_ili_zone;
1731 #endif
1732
1733 return 0;
1734
1735 #ifdef CONFIG_XFS_POSIX_ACL
1736 out_destroy_ili_zone:
1737 #endif
1738 kmem_zone_destroy(xfs_ili_zone);
1739 out_destroy_inode_zone:
1740 kmem_zone_destroy(xfs_inode_zone);
1741 out_destroy_efi_zone:
1742 kmem_zone_destroy(xfs_efi_zone);
1743 out_destroy_efd_zone:
1744 kmem_zone_destroy(xfs_efd_zone);
1745 out_destroy_buf_item_zone:
1746 kmem_zone_destroy(xfs_buf_item_zone);
1747 out_destroy_trans_zone:
1748 kmem_zone_destroy(xfs_trans_zone);
1749 out_destroy_ifork_zone:
1750 kmem_zone_destroy(xfs_ifork_zone);
1751 out_destroy_dabuf_zone:
1752 kmem_zone_destroy(xfs_dabuf_zone);
1753 out_destroy_da_state_zone:
1754 kmem_zone_destroy(xfs_da_state_zone);
1755 out_destroy_btree_cur_zone:
1756 kmem_zone_destroy(xfs_btree_cur_zone);
1757 out_destroy_bmap_free_item_zone:
1758 kmem_zone_destroy(xfs_bmap_free_item_zone);
1759 out_destroy_log_ticket_zone:
1760 kmem_zone_destroy(xfs_log_ticket_zone);
1761 out_destroy_ioend_pool:
1762 mempool_destroy(xfs_ioend_pool);
1763 out_destroy_ioend_zone:
1764 kmem_zone_destroy(xfs_ioend_zone);
1765 out:
1766 return -ENOMEM;
1767 }
1768
1769 STATIC void
1770 xfs_destroy_zones(void)
1771 {
1772 #ifdef CONFIG_XFS_POSIX_ACL
1773 kmem_zone_destroy(xfs_acl_zone);
1774 #endif
1775 kmem_zone_destroy(xfs_ili_zone);
1776 kmem_zone_destroy(xfs_inode_zone);
1777 kmem_zone_destroy(xfs_efi_zone);
1778 kmem_zone_destroy(xfs_efd_zone);
1779 kmem_zone_destroy(xfs_buf_item_zone);
1780 kmem_zone_destroy(xfs_trans_zone);
1781 kmem_zone_destroy(xfs_ifork_zone);
1782 kmem_zone_destroy(xfs_dabuf_zone);
1783 kmem_zone_destroy(xfs_da_state_zone);
1784 kmem_zone_destroy(xfs_btree_cur_zone);
1785 kmem_zone_destroy(xfs_bmap_free_item_zone);
1786 kmem_zone_destroy(xfs_log_ticket_zone);
1787 mempool_destroy(xfs_ioend_pool);
1788 kmem_zone_destroy(xfs_ioend_zone);
1789
1790 }
1791
1792 STATIC int __init
1793 init_xfs_fs(void)
1794 {
1795 int error;
1796
1797 printk(KERN_INFO XFS_VERSION_STRING " with "
1798 XFS_BUILD_OPTIONS " enabled\n");
1799
1800 ktrace_init(64);
1801 xfs_ioend_init();
1802 xfs_dir_startup();
1803
1804 error = xfs_init_zones();
1805 if (error)
1806 goto out;
1807
1808 error = xfs_alloc_trace_bufs();
1809 if (error)
1810 goto out_destroy_zones;
1811
1812 error = xfs_mru_cache_init();
1813 if (error)
1814 goto out_free_trace_buffers;
1815
1816 error = xfs_filestream_init();
1817 if (error)
1818 goto out_mru_cache_uninit;
1819
1820 error = xfs_buf_init();
1821 if (error)
1822 goto out_filestream_uninit;
1823
1824 error = xfs_init_procfs();
1825 if (error)
1826 goto out_buf_terminate;
1827
1828 error = xfs_sysctl_register();
1829 if (error)
1830 goto out_cleanup_procfs;
1831
1832 vfs_initquota();
1833
1834 error = register_filesystem(&xfs_fs_type);
1835 if (error)
1836 goto out_sysctl_unregister;
1837 return 0;
1838
1839 out_sysctl_unregister:
1840 xfs_sysctl_unregister();
1841 out_cleanup_procfs:
1842 xfs_cleanup_procfs();
1843 out_buf_terminate:
1844 xfs_buf_terminate();
1845 out_filestream_uninit:
1846 xfs_filestream_uninit();
1847 out_mru_cache_uninit:
1848 xfs_mru_cache_uninit();
1849 out_free_trace_buffers:
1850 xfs_free_trace_bufs();
1851 out_destroy_zones:
1852 xfs_destroy_zones();
1853 out:
1854 return error;
1855 }
1856
1857 STATIC void __exit
1858 exit_xfs_fs(void)
1859 {
1860 vfs_exitquota();
1861 unregister_filesystem(&xfs_fs_type);
1862 xfs_sysctl_unregister();
1863 xfs_cleanup_procfs();
1864 xfs_buf_terminate();
1865 xfs_filestream_uninit();
1866 xfs_mru_cache_uninit();
1867 xfs_free_trace_bufs();
1868 xfs_destroy_zones();
1869 ktrace_uninit();
1870 }
1871
1872 module_init(init_xfs_fs);
1873 module_exit(exit_xfs_fs);
1874
1875 MODULE_AUTHOR("Silicon Graphics, Inc.");
1876 MODULE_DESCRIPTION(XFS_VERSION_STRING " with " XFS_BUILD_OPTIONS " enabled");
1877 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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