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x86/amd-iommu: Add per IOMMU reference counting
[linux/fpc-iii.git] / fs / xfs / linux-2.6 / xfs_super.c
blob18a4b8e11df2d4241bcfafd59297c30e961241ad
1 /*
2 * Copyright (c) 2000-2006 Silicon Graphics, Inc.
3 * All Rights Reserved.
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
7 * published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it would be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write the Free Software Foundation,
16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
17 */
18 #include "xfs.h"
19 #include "xfs_bit.h"
20 #include "xfs_log.h"
21 #include "xfs_inum.h"
22 #include "xfs_trans.h"
23 #include "xfs_sb.h"
24 #include "xfs_ag.h"
25 #include "xfs_dir2.h"
26 #include "xfs_alloc.h"
27 #include "xfs_dmapi.h"
28 #include "xfs_quota.h"
29 #include "xfs_mount.h"
30 #include "xfs_bmap_btree.h"
31 #include "xfs_alloc_btree.h"
32 #include "xfs_ialloc_btree.h"
33 #include "xfs_dir2_sf.h"
34 #include "xfs_attr_sf.h"
35 #include "xfs_dinode.h"
36 #include "xfs_inode.h"
37 #include "xfs_btree.h"
38 #include "xfs_btree_trace.h"
39 #include "xfs_ialloc.h"
40 #include "xfs_bmap.h"
41 #include "xfs_rtalloc.h"
42 #include "xfs_error.h"
43 #include "xfs_itable.h"
44 #include "xfs_fsops.h"
45 #include "xfs_rw.h"
46 #include "xfs_attr.h"
47 #include "xfs_buf_item.h"
48 #include "xfs_utils.h"
49 #include "xfs_vnodeops.h"
50 #include "xfs_version.h"
51 #include "xfs_log_priv.h"
52 #include "xfs_trans_priv.h"
53 #include "xfs_filestream.h"
54 #include "xfs_da_btree.h"
55 #include "xfs_dir2_trace.h"
56 #include "xfs_extfree_item.h"
57 #include "xfs_mru_cache.h"
58 #include "xfs_inode_item.h"
59 #include "xfs_sync.h"
60
61 #include <linux/namei.h>
62 #include <linux/init.h>
63 #include <linux/mount.h>
64 #include <linux/mempool.h>
65 #include <linux/writeback.h>
66 #include <linux/kthread.h>
67 #include <linux/freezer.h>
68 #include <linux/parser.h>
69
70 static const struct super_operations xfs_super_operations;
71 static kmem_zone_t *xfs_ioend_zone;
72 mempool_t *xfs_ioend_pool;
73
74 #define MNTOPT_LOGBUFS "logbufs" /* number of XFS log buffers */
75 #define MNTOPT_LOGBSIZE "logbsize" /* size of XFS log buffers */
76 #define MNTOPT_LOGDEV "logdev" /* log device */
77 #define MNTOPT_RTDEV "rtdev" /* realtime I/O device */
78 #define MNTOPT_BIOSIZE "biosize" /* log2 of preferred buffered io size */
79 #define MNTOPT_WSYNC "wsync" /* safe-mode nfs compatible mount */
80 #define MNTOPT_NOALIGN "noalign" /* turn off stripe alignment */
81 #define MNTOPT_SWALLOC "swalloc" /* turn on stripe width allocation */
82 #define MNTOPT_SUNIT "sunit" /* data volume stripe unit */
83 #define MNTOPT_SWIDTH "swidth" /* data volume stripe width */
84 #define MNTOPT_NOUUID "nouuid" /* ignore filesystem UUID */
85 #define MNTOPT_MTPT "mtpt" /* filesystem mount point */
86 #define MNTOPT_GRPID "grpid" /* group-ID from parent directory */
87 #define MNTOPT_NOGRPID "nogrpid" /* group-ID from current process */
88 #define MNTOPT_BSDGROUPS "bsdgroups" /* group-ID from parent directory */
89 #define MNTOPT_SYSVGROUPS "sysvgroups" /* group-ID from current process */
90 #define MNTOPT_ALLOCSIZE "allocsize" /* preferred allocation size */
91 #define MNTOPT_NORECOVERY "norecovery" /* don't run XFS recovery */
92 #define MNTOPT_BARRIER "barrier" /* use writer barriers for log write and
93 * unwritten extent conversion */
94 #define MNTOPT_NOBARRIER "nobarrier" /* .. disable */
95 #define MNTOPT_OSYNCISOSYNC "osyncisosync" /* o_sync is REALLY o_sync */
96 #define MNTOPT_64BITINODE "inode64" /* inodes can be allocated anywhere */
97 #define MNTOPT_IKEEP "ikeep" /* do not free empty inode clusters */
98 #define MNTOPT_NOIKEEP "noikeep" /* free empty inode clusters */
99 #define MNTOPT_LARGEIO "largeio" /* report large I/O sizes in stat() */
100 #define MNTOPT_NOLARGEIO "nolargeio" /* do not report large I/O sizes
101 * in stat(). */
102 #define MNTOPT_ATTR2 "attr2" /* do use attr2 attribute format */
103 #define MNTOPT_NOATTR2 "noattr2" /* do not use attr2 attribute format */
104 #define MNTOPT_FILESTREAM "filestreams" /* use filestreams allocator */
105 #define MNTOPT_QUOTA "quota" /* disk quotas (user) */
106 #define MNTOPT_NOQUOTA "noquota" /* no quotas */
107 #define MNTOPT_USRQUOTA "usrquota" /* user quota enabled */
108 #define MNTOPT_GRPQUOTA "grpquota" /* group quota enabled */
109 #define MNTOPT_PRJQUOTA "prjquota" /* project quota enabled */
110 #define MNTOPT_UQUOTA "uquota" /* user quota (IRIX variant) */
111 #define MNTOPT_GQUOTA "gquota" /* group quota (IRIX variant) */
112 #define MNTOPT_PQUOTA "pquota" /* project quota (IRIX variant) */
113 #define MNTOPT_UQUOTANOENF "uqnoenforce"/* user quota limit enforcement */
114 #define MNTOPT_GQUOTANOENF "gqnoenforce"/* group quota limit enforcement */
115 #define MNTOPT_PQUOTANOENF "pqnoenforce"/* project quota limit enforcement */
116 #define MNTOPT_QUOTANOENF "qnoenforce" /* same as uqnoenforce */
117 #define MNTOPT_DMAPI "dmapi" /* DMI enabled (DMAPI / XDSM) */
118 #define MNTOPT_XDSM "xdsm" /* DMI enabled (DMAPI / XDSM) */
119 #define MNTOPT_DMI "dmi" /* DMI enabled (DMAPI / XDSM) */
120
121 /*
122 * Table driven mount option parser.
123 *
124 * Currently only used for remount, but it will be used for mount
125 * in the future, too.
126 */
127 enum {
128 Opt_barrier, Opt_nobarrier, Opt_err
129 };
130
131 static const match_table_t tokens = {
132 {Opt_barrier, "barrier"},
133 {Opt_nobarrier, "nobarrier"},
134 {Opt_err, NULL}
135 };
136
137
138 STATIC unsigned long
139 suffix_strtoul(char *s, char **endp, unsigned int base)
140 {
141 int last, shift_left_factor = 0;
142 char *value = s;
143
144 last = strlen(value) - 1;
145 if (value[last] == 'K' || value[last] == 'k') {
146 shift_left_factor = 10;
147 value[last] = '\0';
148 }
149 if (value[last] == 'M' || value[last] == 'm') {
150 shift_left_factor = 20;
151 value[last] = '\0';
152 }
153 if (value[last] == 'G' || value[last] == 'g') {
154 shift_left_factor = 30;
155 value[last] = '\0';
156 }
157
158 return simple_strtoul((const char *)s, endp, base) << shift_left_factor;
159 }
160
161 /*
162 * This function fills in xfs_mount_t fields based on mount args.
163 * Note: the superblock has _not_ yet been read in.
164 *
165 * Note that this function leaks the various device name allocations on
166 * failure. The caller takes care of them.
167 */
168 STATIC int
169 xfs_parseargs(
170 struct xfs_mount *mp,
171 char *options,
172 char **mtpt)
173 {
174 struct super_block *sb = mp->m_super;
175 char *this_char, *value, *eov;
176 int dsunit = 0;
177 int dswidth = 0;
178 int iosize = 0;
179 int dmapi_implies_ikeep = 1;
180 __uint8_t iosizelog = 0;
181
182 /*
183 * Copy binary VFS mount flags we are interested in.
184 */
185 if (sb->s_flags & MS_RDONLY)
186 mp->m_flags |= XFS_MOUNT_RDONLY;
187 if (sb->s_flags & MS_DIRSYNC)
188 mp->m_flags |= XFS_MOUNT_DIRSYNC;
189 if (sb->s_flags & MS_SYNCHRONOUS)
190 mp->m_flags |= XFS_MOUNT_WSYNC;
191
192 /*
193 * Set some default flags that could be cleared by the mount option
194 * parsing.
195 */
196 mp->m_flags |= XFS_MOUNT_BARRIER;
197 mp->m_flags |= XFS_MOUNT_COMPAT_IOSIZE;
198 mp->m_flags |= XFS_MOUNT_SMALL_INUMS;
199
200 /*
201 * These can be overridden by the mount option parsing.
202 */
203 mp->m_logbufs = -1;
204 mp->m_logbsize = -1;
205
206 if (!options)
207 goto done;
208
209 while ((this_char = strsep(&options, ",")) != NULL) {
210 if (!*this_char)
211 continue;
212 if ((value = strchr(this_char, '=')) != NULL)
213 *value++ = 0;
214
215 if (!strcmp(this_char, MNTOPT_LOGBUFS)) {
216 if (!value || !*value) {
217 cmn_err(CE_WARN,
218 "XFS: %s option requires an argument",
219 this_char);
220 return EINVAL;
221 }
222 mp->m_logbufs = simple_strtoul(value, &eov, 10);
223 } else if (!strcmp(this_char, MNTOPT_LOGBSIZE)) {
224 if (!value || !*value) {
225 cmn_err(CE_WARN,
226 "XFS: %s option requires an argument",
227 this_char);
228 return EINVAL;
229 }
230 mp->m_logbsize = suffix_strtoul(value, &eov, 10);
231 } else if (!strcmp(this_char, MNTOPT_LOGDEV)) {
232 if (!value || !*value) {
233 cmn_err(CE_WARN,
234 "XFS: %s option requires an argument",
235 this_char);
236 return EINVAL;
237 }
238 mp->m_logname = kstrndup(value, MAXNAMELEN, GFP_KERNEL);
239 if (!mp->m_logname)
240 return ENOMEM;
241 } else if (!strcmp(this_char, MNTOPT_MTPT)) {
242 if (!value || !*value) {
243 cmn_err(CE_WARN,
244 "XFS: %s option requires an argument",
245 this_char);
246 return EINVAL;
247 }
248 *mtpt = kstrndup(value, MAXNAMELEN, GFP_KERNEL);
249 if (!*mtpt)
250 return ENOMEM;
251 } else if (!strcmp(this_char, MNTOPT_RTDEV)) {
252 if (!value || !*value) {
253 cmn_err(CE_WARN,
254 "XFS: %s option requires an argument",
255 this_char);
256 return EINVAL;
257 }
258 mp->m_rtname = kstrndup(value, MAXNAMELEN, GFP_KERNEL);
259 if (!mp->m_rtname)
260 return ENOMEM;
261 } else if (!strcmp(this_char, MNTOPT_BIOSIZE)) {
262 if (!value || !*value) {
263 cmn_err(CE_WARN,
264 "XFS: %s option requires an argument",
265 this_char);
266 return EINVAL;
267 }
268 iosize = simple_strtoul(value, &eov, 10);
269 iosizelog = ffs(iosize) - 1;
270 } else if (!strcmp(this_char, MNTOPT_ALLOCSIZE)) {
271 if (!value || !*value) {
272 cmn_err(CE_WARN,
273 "XFS: %s option requires an argument",
274 this_char);
275 return EINVAL;
276 }
277 iosize = suffix_strtoul(value, &eov, 10);
278 iosizelog = ffs(iosize) - 1;
279 } else if (!strcmp(this_char, MNTOPT_GRPID) ||
280 !strcmp(this_char, MNTOPT_BSDGROUPS)) {
281 mp->m_flags |= XFS_MOUNT_GRPID;
282 } else if (!strcmp(this_char, MNTOPT_NOGRPID) ||
283 !strcmp(this_char, MNTOPT_SYSVGROUPS)) {
284 mp->m_flags &= ~XFS_MOUNT_GRPID;
285 } else if (!strcmp(this_char, MNTOPT_WSYNC)) {
286 mp->m_flags |= XFS_MOUNT_WSYNC;
287 } else if (!strcmp(this_char, MNTOPT_OSYNCISOSYNC)) {
288 mp->m_flags |= XFS_MOUNT_OSYNCISOSYNC;
289 } else if (!strcmp(this_char, MNTOPT_NORECOVERY)) {
290 mp->m_flags |= XFS_MOUNT_NORECOVERY;
291 } else if (!strcmp(this_char, MNTOPT_NOALIGN)) {
292 mp->m_flags |= XFS_MOUNT_NOALIGN;
293 } else if (!strcmp(this_char, MNTOPT_SWALLOC)) {
294 mp->m_flags |= XFS_MOUNT_SWALLOC;
295 } else if (!strcmp(this_char, MNTOPT_SUNIT)) {
296 if (!value || !*value) {
297 cmn_err(CE_WARN,
298 "XFS: %s option requires an argument",
299 this_char);
300 return EINVAL;
301 }
302 dsunit = simple_strtoul(value, &eov, 10);
303 } else if (!strcmp(this_char, MNTOPT_SWIDTH)) {
304 if (!value || !*value) {
305 cmn_err(CE_WARN,
306 "XFS: %s option requires an argument",
307 this_char);
308 return EINVAL;
309 }
310 dswidth = simple_strtoul(value, &eov, 10);
311 } else if (!strcmp(this_char, MNTOPT_64BITINODE)) {
312 mp->m_flags &= ~XFS_MOUNT_SMALL_INUMS;
313 #if !XFS_BIG_INUMS
314 cmn_err(CE_WARN,
315 "XFS: %s option not allowed on this system",
316 this_char);
317 return EINVAL;
318 #endif
319 } else if (!strcmp(this_char, MNTOPT_NOUUID)) {
320 mp->m_flags |= XFS_MOUNT_NOUUID;
321 } else if (!strcmp(this_char, MNTOPT_BARRIER)) {
322 mp->m_flags |= XFS_MOUNT_BARRIER;
323 } else if (!strcmp(this_char, MNTOPT_NOBARRIER)) {
324 mp->m_flags &= ~XFS_MOUNT_BARRIER;
325 } else if (!strcmp(this_char, MNTOPT_IKEEP)) {
326 mp->m_flags |= XFS_MOUNT_IKEEP;
327 } else if (!strcmp(this_char, MNTOPT_NOIKEEP)) {
328 dmapi_implies_ikeep = 0;
329 mp->m_flags &= ~XFS_MOUNT_IKEEP;
330 } else if (!strcmp(this_char, MNTOPT_LARGEIO)) {
331 mp->m_flags &= ~XFS_MOUNT_COMPAT_IOSIZE;
332 } else if (!strcmp(this_char, MNTOPT_NOLARGEIO)) {
333 mp->m_flags |= XFS_MOUNT_COMPAT_IOSIZE;
334 } else if (!strcmp(this_char, MNTOPT_ATTR2)) {
335 mp->m_flags |= XFS_MOUNT_ATTR2;
336 } else if (!strcmp(this_char, MNTOPT_NOATTR2)) {
337 mp->m_flags &= ~XFS_MOUNT_ATTR2;
338 mp->m_flags |= XFS_MOUNT_NOATTR2;
339 } else if (!strcmp(this_char, MNTOPT_FILESTREAM)) {
340 mp->m_flags |= XFS_MOUNT_FILESTREAMS;
341 } else if (!strcmp(this_char, MNTOPT_NOQUOTA)) {
342 mp->m_qflags &= ~(XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE |
343 XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE |
344 XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE |
345 XFS_UQUOTA_ENFD | XFS_OQUOTA_ENFD);
346 } else if (!strcmp(this_char, MNTOPT_QUOTA) ||
347 !strcmp(this_char, MNTOPT_UQUOTA) ||
348 !strcmp(this_char, MNTOPT_USRQUOTA)) {
349 mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE |
350 XFS_UQUOTA_ENFD);
351 } else if (!strcmp(this_char, MNTOPT_QUOTANOENF) ||
352 !strcmp(this_char, MNTOPT_UQUOTANOENF)) {
353 mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE);
354 mp->m_qflags &= ~XFS_UQUOTA_ENFD;
355 } else if (!strcmp(this_char, MNTOPT_PQUOTA) ||
356 !strcmp(this_char, MNTOPT_PRJQUOTA)) {
357 mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE |
358 XFS_OQUOTA_ENFD);
359 } else if (!strcmp(this_char, MNTOPT_PQUOTANOENF)) {
360 mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE);
361 mp->m_qflags &= ~XFS_OQUOTA_ENFD;
362 } else if (!strcmp(this_char, MNTOPT_GQUOTA) ||
363 !strcmp(this_char, MNTOPT_GRPQUOTA)) {
364 mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE |
365 XFS_OQUOTA_ENFD);
366 } else if (!strcmp(this_char, MNTOPT_GQUOTANOENF)) {
367 mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE);
368 mp->m_qflags &= ~XFS_OQUOTA_ENFD;
369 } else if (!strcmp(this_char, MNTOPT_DMAPI)) {
370 mp->m_flags |= XFS_MOUNT_DMAPI;
371 } else if (!strcmp(this_char, MNTOPT_XDSM)) {
372 mp->m_flags |= XFS_MOUNT_DMAPI;
373 } else if (!strcmp(this_char, MNTOPT_DMI)) {
374 mp->m_flags |= XFS_MOUNT_DMAPI;
375 } else if (!strcmp(this_char, "ihashsize")) {
376 cmn_err(CE_WARN,
377 "XFS: ihashsize no longer used, option is deprecated.");
378 } else if (!strcmp(this_char, "osyncisdsync")) {
379 /* no-op, this is now the default */
380 cmn_err(CE_WARN,
381 "XFS: osyncisdsync is now the default, option is deprecated.");
382 } else if (!strcmp(this_char, "irixsgid")) {
383 cmn_err(CE_WARN,
384 "XFS: irixsgid is now a sysctl(2) variable, option is deprecated.");
385 } else {
386 cmn_err(CE_WARN,
387 "XFS: unknown mount option [%s].", this_char);
388 return EINVAL;
389 }
390 }
391
392 /*
393 * no recovery flag requires a read-only mount
394 */
395 if ((mp->m_flags & XFS_MOUNT_NORECOVERY) &&
396 !(mp->m_flags & XFS_MOUNT_RDONLY)) {
397 cmn_err(CE_WARN, "XFS: no-recovery mounts must be read-only.");
398 return EINVAL;
399 }
400
401 if ((mp->m_flags & XFS_MOUNT_NOALIGN) && (dsunit || dswidth)) {
402 cmn_err(CE_WARN,
403 "XFS: sunit and swidth options incompatible with the noalign option");
404 return EINVAL;
405 }
406
407 #ifndef CONFIG_XFS_QUOTA
408 if (XFS_IS_QUOTA_RUNNING(mp)) {
409 cmn_err(CE_WARN,
410 "XFS: quota support not available in this kernel.");
411 return EINVAL;
412 }
413 #endif
414
415 if ((mp->m_qflags & (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE)) &&
416 (mp->m_qflags & (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE))) {
417 cmn_err(CE_WARN,
418 "XFS: cannot mount with both project and group quota");
419 return EINVAL;
420 }
421
422 if ((mp->m_flags & XFS_MOUNT_DMAPI) && (!*mtpt || *mtpt[0] == '\0')) {
423 printk("XFS: %s option needs the mount point option as well\n",
424 MNTOPT_DMAPI);
425 return EINVAL;
426 }
427
428 if ((dsunit && !dswidth) || (!dsunit && dswidth)) {
429 cmn_err(CE_WARN,
430 "XFS: sunit and swidth must be specified together");
431 return EINVAL;
432 }
433
434 if (dsunit && (dswidth % dsunit != 0)) {
435 cmn_err(CE_WARN,
436 "XFS: stripe width (%d) must be a multiple of the stripe unit (%d)",
437 dswidth, dsunit);
438 return EINVAL;
439 }
440
441 /*
442 * Applications using DMI filesystems often expect the
443 * inode generation number to be monotonically increasing.
444 * If we delete inode chunks we break this assumption, so
445 * keep unused inode chunks on disk for DMI filesystems
446 * until we come up with a better solution.
447 * Note that if "ikeep" or "noikeep" mount options are
448 * supplied, then they are honored.
449 */
450 if ((mp->m_flags & XFS_MOUNT_DMAPI) && dmapi_implies_ikeep)
451 mp->m_flags |= XFS_MOUNT_IKEEP;
452
453 done:
454 if (!(mp->m_flags & XFS_MOUNT_NOALIGN)) {
455 /*
456 * At this point the superblock has not been read
457 * in, therefore we do not know the block size.
458 * Before the mount call ends we will convert
459 * these to FSBs.
460 */
461 if (dsunit) {
462 mp->m_dalign = dsunit;
463 mp->m_flags |= XFS_MOUNT_RETERR;
464 }
465
466 if (dswidth)
467 mp->m_swidth = dswidth;
468 }
469
470 if (mp->m_logbufs != -1 &&
471 mp->m_logbufs != 0 &&
472 (mp->m_logbufs < XLOG_MIN_ICLOGS ||
473 mp->m_logbufs > XLOG_MAX_ICLOGS)) {
474 cmn_err(CE_WARN,
475 "XFS: invalid logbufs value: %d [not %d-%d]",
476 mp->m_logbufs, XLOG_MIN_ICLOGS, XLOG_MAX_ICLOGS);
477 return XFS_ERROR(EINVAL);
478 }
479 if (mp->m_logbsize != -1 &&
480 mp->m_logbsize != 0 &&
481 (mp->m_logbsize < XLOG_MIN_RECORD_BSIZE ||
482 mp->m_logbsize > XLOG_MAX_RECORD_BSIZE ||
483 !is_power_of_2(mp->m_logbsize))) {
484 cmn_err(CE_WARN,
485 "XFS: invalid logbufsize: %d [not 16k,32k,64k,128k or 256k]",
486 mp->m_logbsize);
487 return XFS_ERROR(EINVAL);
488 }
489
490 mp->m_fsname = kstrndup(sb->s_id, MAXNAMELEN, GFP_KERNEL);
491 if (!mp->m_fsname)
492 return ENOMEM;
493 mp->m_fsname_len = strlen(mp->m_fsname) + 1;
494
495 if (iosizelog) {
496 if (iosizelog > XFS_MAX_IO_LOG ||
497 iosizelog < XFS_MIN_IO_LOG) {
498 cmn_err(CE_WARN,
499 "XFS: invalid log iosize: %d [not %d-%d]",
500 iosizelog, XFS_MIN_IO_LOG,
501 XFS_MAX_IO_LOG);
502 return XFS_ERROR(EINVAL);
503 }
504
505 mp->m_flags |= XFS_MOUNT_DFLT_IOSIZE;
506 mp->m_readio_log = iosizelog;
507 mp->m_writeio_log = iosizelog;
508 }
509
510 return 0;
511 }
512
513 struct proc_xfs_info {
514 int flag;
515 char *str;
516 };
517
518 STATIC int
519 xfs_showargs(
520 struct xfs_mount *mp,
521 struct seq_file *m)
522 {
523 static struct proc_xfs_info xfs_info_set[] = {
524 /* the few simple ones we can get from the mount struct */
525 { XFS_MOUNT_IKEEP, "," MNTOPT_IKEEP },
526 { XFS_MOUNT_WSYNC, "," MNTOPT_WSYNC },
527 { XFS_MOUNT_NOALIGN, "," MNTOPT_NOALIGN },
528 { XFS_MOUNT_SWALLOC, "," MNTOPT_SWALLOC },
529 { XFS_MOUNT_NOUUID, "," MNTOPT_NOUUID },
530 { XFS_MOUNT_NORECOVERY, "," MNTOPT_NORECOVERY },
531 { XFS_MOUNT_OSYNCISOSYNC, "," MNTOPT_OSYNCISOSYNC },
532 { XFS_MOUNT_ATTR2, "," MNTOPT_ATTR2 },
533 { XFS_MOUNT_FILESTREAMS, "," MNTOPT_FILESTREAM },
534 { XFS_MOUNT_DMAPI, "," MNTOPT_DMAPI },
535 { XFS_MOUNT_GRPID, "," MNTOPT_GRPID },
536 { 0, NULL }
537 };
538 static struct proc_xfs_info xfs_info_unset[] = {
539 /* the few simple ones we can get from the mount struct */
540 { XFS_MOUNT_COMPAT_IOSIZE, "," MNTOPT_LARGEIO },
541 { XFS_MOUNT_BARRIER, "," MNTOPT_NOBARRIER },
542 { XFS_MOUNT_SMALL_INUMS, "," MNTOPT_64BITINODE },
543 { 0, NULL }
544 };
545 struct proc_xfs_info *xfs_infop;
546
547 for (xfs_infop = xfs_info_set; xfs_infop->flag; xfs_infop++) {
548 if (mp->m_flags & xfs_infop->flag)
549 seq_puts(m, xfs_infop->str);
550 }
551 for (xfs_infop = xfs_info_unset; xfs_infop->flag; xfs_infop++) {
552 if (!(mp->m_flags & xfs_infop->flag))
553 seq_puts(m, xfs_infop->str);
554 }
555
556 if (mp->m_flags & XFS_MOUNT_DFLT_IOSIZE)
557 seq_printf(m, "," MNTOPT_ALLOCSIZE "=%dk",
558 (int)(1 << mp->m_writeio_log) >> 10);
559
560 if (mp->m_logbufs > 0)
561 seq_printf(m, "," MNTOPT_LOGBUFS "=%d", mp->m_logbufs);
562 if (mp->m_logbsize > 0)
563 seq_printf(m, "," MNTOPT_LOGBSIZE "=%dk", mp->m_logbsize >> 10);
564
565 if (mp->m_logname)
566 seq_printf(m, "," MNTOPT_LOGDEV "=%s", mp->m_logname);
567 if (mp->m_rtname)
568 seq_printf(m, "," MNTOPT_RTDEV "=%s", mp->m_rtname);
569
570 if (mp->m_dalign > 0)
571 seq_printf(m, "," MNTOPT_SUNIT "=%d",
572 (int)XFS_FSB_TO_BB(mp, mp->m_dalign));
573 if (mp->m_swidth > 0)
574 seq_printf(m, "," MNTOPT_SWIDTH "=%d",
575 (int)XFS_FSB_TO_BB(mp, mp->m_swidth));
576
577 if (mp->m_qflags & (XFS_UQUOTA_ACCT|XFS_UQUOTA_ENFD))
578 seq_puts(m, "," MNTOPT_USRQUOTA);
579 else if (mp->m_qflags & XFS_UQUOTA_ACCT)
580 seq_puts(m, "," MNTOPT_UQUOTANOENF);
581
582 /* Either project or group quotas can be active, not both */
583
584 if (mp->m_qflags & XFS_PQUOTA_ACCT) {
585 if (mp->m_qflags & XFS_OQUOTA_ENFD)
586 seq_puts(m, "," MNTOPT_PRJQUOTA);
587 else
588 seq_puts(m, "," MNTOPT_PQUOTANOENF);
589 } else if (mp->m_qflags & XFS_GQUOTA_ACCT) {
590 if (mp->m_qflags & XFS_OQUOTA_ENFD)
591 seq_puts(m, "," MNTOPT_GRPQUOTA);
592 else
593 seq_puts(m, "," MNTOPT_GQUOTANOENF);
594 }
595
596 if (!(mp->m_qflags & XFS_ALL_QUOTA_ACCT))
597 seq_puts(m, "," MNTOPT_NOQUOTA);
598
599 return 0;
600 }
601 __uint64_t
602 xfs_max_file_offset(
603 unsigned int blockshift)
604 {
605 unsigned int pagefactor = 1;
606 unsigned int bitshift = BITS_PER_LONG - 1;
607
608 /* Figure out maximum filesize, on Linux this can depend on
609 * the filesystem blocksize (on 32 bit platforms).
610 * __block_prepare_write does this in an [unsigned] long...
611 * page->index << (PAGE_CACHE_SHIFT - bbits)
612 * So, for page sized blocks (4K on 32 bit platforms),
613 * this wraps at around 8Tb (hence MAX_LFS_FILESIZE which is
614 * (((u64)PAGE_CACHE_SIZE << (BITS_PER_LONG-1))-1)
615 * but for smaller blocksizes it is less (bbits = log2 bsize).
616 * Note1: get_block_t takes a long (implicit cast from above)
617 * Note2: The Large Block Device (LBD and HAVE_SECTOR_T) patch
618 * can optionally convert the [unsigned] long from above into
619 * an [unsigned] long long.
620 */
621
622 #if BITS_PER_LONG == 32
623 # if defined(CONFIG_LBDAF)
624 ASSERT(sizeof(sector_t) == 8);
625 pagefactor = PAGE_CACHE_SIZE;
626 bitshift = BITS_PER_LONG;
627 # else
628 pagefactor = PAGE_CACHE_SIZE >> (PAGE_CACHE_SHIFT - blockshift);
629 # endif
630 #endif
631
632 return (((__uint64_t)pagefactor) << bitshift) - 1;
633 }
634
635 STATIC int
636 xfs_blkdev_get(
637 xfs_mount_t *mp,
638 const char *name,
639 struct block_device **bdevp)
640 {
641 int error = 0;
642
643 *bdevp = open_bdev_exclusive(name, FMODE_READ|FMODE_WRITE, mp);
644 if (IS_ERR(*bdevp)) {
645 error = PTR_ERR(*bdevp);
646 printk("XFS: Invalid device [%s], error=%d\n", name, error);
647 }
648
649 return -error;
650 }
651
652 STATIC void
653 xfs_blkdev_put(
654 struct block_device *bdev)
655 {
656 if (bdev)
657 close_bdev_exclusive(bdev, FMODE_READ|FMODE_WRITE);
658 }
659
660 /*
661 * Try to write out the superblock using barriers.
662 */
663 STATIC int
664 xfs_barrier_test(
665 xfs_mount_t *mp)
666 {
667 xfs_buf_t *sbp = xfs_getsb(mp, 0);
668 int error;
669
670 XFS_BUF_UNDONE(sbp);
671 XFS_BUF_UNREAD(sbp);
672 XFS_BUF_UNDELAYWRITE(sbp);
673 XFS_BUF_WRITE(sbp);
674 XFS_BUF_UNASYNC(sbp);
675 XFS_BUF_ORDERED(sbp);
676
677 xfsbdstrat(mp, sbp);
678 error = xfs_iowait(sbp);
679
680 /*
681 * Clear all the flags we set and possible error state in the
682 * buffer. We only did the write to try out whether barriers
683 * worked and shouldn't leave any traces in the superblock
684 * buffer.
685 */
686 XFS_BUF_DONE(sbp);
687 XFS_BUF_ERROR(sbp, 0);
688 XFS_BUF_UNORDERED(sbp);
689
690 xfs_buf_relse(sbp);
691 return error;
692 }
693
694 STATIC void
695 xfs_mountfs_check_barriers(xfs_mount_t *mp)
696 {
697 int error;
698
699 if (mp->m_logdev_targp != mp->m_ddev_targp) {
700 xfs_fs_cmn_err(CE_NOTE, mp,
701 "Disabling barriers, not supported with external log device");
702 mp->m_flags &= ~XFS_MOUNT_BARRIER;
703 return;
704 }
705
706 if (xfs_readonly_buftarg(mp->m_ddev_targp)) {
707 xfs_fs_cmn_err(CE_NOTE, mp,
708 "Disabling barriers, underlying device is readonly");
709 mp->m_flags &= ~XFS_MOUNT_BARRIER;
710 return;
711 }
712
713 error = xfs_barrier_test(mp);
714 if (error) {
715 xfs_fs_cmn_err(CE_NOTE, mp,
716 "Disabling barriers, trial barrier write failed");
717 mp->m_flags &= ~XFS_MOUNT_BARRIER;
718 return;
719 }
720 }
721
722 void
723 xfs_blkdev_issue_flush(
724 xfs_buftarg_t *buftarg)
725 {
726 blkdev_issue_flush(buftarg->bt_bdev, NULL);
727 }
728
729 STATIC void
730 xfs_close_devices(
731 struct xfs_mount *mp)
732 {
733 if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp) {
734 struct block_device *logdev = mp->m_logdev_targp->bt_bdev;
735 xfs_free_buftarg(mp, mp->m_logdev_targp);
736 xfs_blkdev_put(logdev);
737 }
738 if (mp->m_rtdev_targp) {
739 struct block_device *rtdev = mp->m_rtdev_targp->bt_bdev;
740 xfs_free_buftarg(mp, mp->m_rtdev_targp);
741 xfs_blkdev_put(rtdev);
742 }
743 xfs_free_buftarg(mp, mp->m_ddev_targp);
744 }
745
746 /*
747 * The file system configurations are:
748 * (1) device (partition) with data and internal log
749 * (2) logical volume with data and log subvolumes.
750 * (3) logical volume with data, log, and realtime subvolumes.
751 *
752 * We only have to handle opening the log and realtime volumes here if
753 * they are present. The data subvolume has already been opened by
754 * get_sb_bdev() and is stored in sb->s_bdev.
755 */
756 STATIC int
757 xfs_open_devices(
758 struct xfs_mount *mp)
759 {
760 struct block_device *ddev = mp->m_super->s_bdev;
761 struct block_device *logdev = NULL, *rtdev = NULL;
762 int error;
763
764 /*
765 * Open real time and log devices - order is important.
766 */
767 if (mp->m_logname) {
768 error = xfs_blkdev_get(mp, mp->m_logname, &logdev);
769 if (error)
770 goto out;
771 }
772
773 if (mp->m_rtname) {
774 error = xfs_blkdev_get(mp, mp->m_rtname, &rtdev);
775 if (error)
776 goto out_close_logdev;
777
778 if (rtdev == ddev || rtdev == logdev) {
779 cmn_err(CE_WARN,
780 "XFS: Cannot mount filesystem with identical rtdev and ddev/logdev.");
781 error = EINVAL;
782 goto out_close_rtdev;
783 }
784 }
785
786 /*
787 * Setup xfs_mount buffer target pointers
788 */
789 error = ENOMEM;
790 mp->m_ddev_targp = xfs_alloc_buftarg(ddev, 0);
791 if (!mp->m_ddev_targp)
792 goto out_close_rtdev;
793
794 if (rtdev) {
795 mp->m_rtdev_targp = xfs_alloc_buftarg(rtdev, 1);
796 if (!mp->m_rtdev_targp)
797 goto out_free_ddev_targ;
798 }
799
800 if (logdev && logdev != ddev) {
801 mp->m_logdev_targp = xfs_alloc_buftarg(logdev, 1);
802 if (!mp->m_logdev_targp)
803 goto out_free_rtdev_targ;
804 } else {
805 mp->m_logdev_targp = mp->m_ddev_targp;
806 }
807
808 return 0;
809
810 out_free_rtdev_targ:
811 if (mp->m_rtdev_targp)
812 xfs_free_buftarg(mp, mp->m_rtdev_targp);
813 out_free_ddev_targ:
814 xfs_free_buftarg(mp, mp->m_ddev_targp);
815 out_close_rtdev:
816 if (rtdev)
817 xfs_blkdev_put(rtdev);
818 out_close_logdev:
819 if (logdev && logdev != ddev)
820 xfs_blkdev_put(logdev);
821 out:
822 return error;
823 }
824
825 /*
826 * Setup xfs_mount buffer target pointers based on superblock
827 */
828 STATIC int
829 xfs_setup_devices(
830 struct xfs_mount *mp)
831 {
832 int error;
833
834 error = xfs_setsize_buftarg(mp->m_ddev_targp, mp->m_sb.sb_blocksize,
835 mp->m_sb.sb_sectsize);
836 if (error)
837 return error;
838
839 if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp) {
840 unsigned int log_sector_size = BBSIZE;
841
842 if (xfs_sb_version_hassector(&mp->m_sb))
843 log_sector_size = mp->m_sb.sb_logsectsize;
844 error = xfs_setsize_buftarg(mp->m_logdev_targp,
845 mp->m_sb.sb_blocksize,
846 log_sector_size);
847 if (error)
848 return error;
849 }
850 if (mp->m_rtdev_targp) {
851 error = xfs_setsize_buftarg(mp->m_rtdev_targp,
852 mp->m_sb.sb_blocksize,
853 mp->m_sb.sb_sectsize);
854 if (error)
855 return error;
856 }
857
858 return 0;
859 }
860
861 /*
862 * XFS AIL push thread support
863 */
864 void
865 xfsaild_wakeup(
866 struct xfs_ail *ailp,
867 xfs_lsn_t threshold_lsn)
868 {
869 ailp->xa_target = threshold_lsn;
870 wake_up_process(ailp->xa_task);
871 }
872
873 STATIC int
874 xfsaild(
875 void *data)
876 {
877 struct xfs_ail *ailp = data;
878 xfs_lsn_t last_pushed_lsn = 0;
879 long tout = 0;
880
881 while (!kthread_should_stop()) {
882 if (tout)
883 schedule_timeout_interruptible(msecs_to_jiffies(tout));
884 tout = 1000;
885
886 /* swsusp */
887 try_to_freeze();
888
889 ASSERT(ailp->xa_mount->m_log);
890 if (XFS_FORCED_SHUTDOWN(ailp->xa_mount))
891 continue;
892
893 tout = xfsaild_push(ailp, &last_pushed_lsn);
894 }
895
896 return 0;
897 } /* xfsaild */
898
899 int
900 xfsaild_start(
901 struct xfs_ail *ailp)
902 {
903 ailp->xa_target = 0;
904 ailp->xa_task = kthread_run(xfsaild, ailp, "xfsaild");
905 if (IS_ERR(ailp->xa_task))
906 return -PTR_ERR(ailp->xa_task);
907 return 0;
908 }
909
910 void
911 xfsaild_stop(
912 struct xfs_ail *ailp)
913 {
914 kthread_stop(ailp->xa_task);
915 }
916
917
918 /* Catch misguided souls that try to use this interface on XFS */
919 STATIC struct inode *
920 xfs_fs_alloc_inode(
921 struct super_block *sb)
922 {
923 BUG();
924 return NULL;
925 }
926
927 /*
928 * Now that the generic code is guaranteed not to be accessing
929 * the linux inode, we can reclaim the inode.
930 */
931 STATIC void
932 xfs_fs_destroy_inode(
933 struct inode *inode)
934 {
935 xfs_inode_t *ip = XFS_I(inode);
936
937 XFS_STATS_INC(vn_reclaim);
938 if (xfs_reclaim(ip))
939 panic("%s: cannot reclaim 0x%p\n", __func__, inode);
940 }
941
942 /*
943 * Slab object creation initialisation for the XFS inode.
944 * This covers only the idempotent fields in the XFS inode;
945 * all other fields need to be initialised on allocation
946 * from the slab. This avoids the need to repeatedly intialise
947 * fields in the xfs inode that left in the initialise state
948 * when freeing the inode.
949 */
950 STATIC void
951 xfs_fs_inode_init_once(
952 void *inode)
953 {
954 struct xfs_inode *ip = inode;
955
956 memset(ip, 0, sizeof(struct xfs_inode));
957
958 /* vfs inode */
959 inode_init_once(VFS_I(ip));
960
961 /* xfs inode */
962 atomic_set(&ip->i_iocount, 0);
963 atomic_set(&ip->i_pincount, 0);
964 spin_lock_init(&ip->i_flags_lock);
965 init_waitqueue_head(&ip->i_ipin_wait);
966 /*
967 * Because we want to use a counting completion, complete
968 * the flush completion once to allow a single access to
969 * the flush completion without blocking.
970 */
971 init_completion(&ip->i_flush);
972 complete(&ip->i_flush);
973
974 mrlock_init(&ip->i_lock, MRLOCK_ALLOW_EQUAL_PRI|MRLOCK_BARRIER,
975 "xfsino", ip->i_ino);
976 mrlock_init(&ip->i_iolock, MRLOCK_BARRIER, "xfsio", ip->i_ino);
977 }
978
979 /*
980 * Dirty the XFS inode when mark_inode_dirty_sync() is called so that
981 * we catch unlogged VFS level updates to the inode. Care must be taken
982 * here - the transaction code calls mark_inode_dirty_sync() to mark the
983 * VFS inode dirty in a transaction and clears the i_update_core field;
984 * it must clear the field after calling mark_inode_dirty_sync() to
985 * correctly indicate that the dirty state has been propagated into the
986 * inode log item.
987 *
988 * We need the barrier() to maintain correct ordering between unlogged
989 * updates and the transaction commit code that clears the i_update_core
990 * field. This requires all updates to be completed before marking the
991 * inode dirty.
992 */
993 STATIC void
994 xfs_fs_dirty_inode(
995 struct inode *inode)
996 {
997 barrier();
998 XFS_I(inode)->i_update_core = 1;
999 }
1000
1001 /*
1002 * Attempt to flush the inode, this will actually fail
1003 * if the inode is pinned, but we dirty the inode again
1004 * at the point when it is unpinned after a log write,
1005 * since this is when the inode itself becomes flushable.
1006 */
1007 STATIC int
1008 xfs_fs_write_inode(
1009 struct inode *inode,
1010 int sync)
1011 {
1012 struct xfs_inode *ip = XFS_I(inode);
1013 struct xfs_mount *mp = ip->i_mount;
1014 int error = 0;
1015
1016 xfs_itrace_entry(ip);
1017
1018 if (XFS_FORCED_SHUTDOWN(mp))
1019 return XFS_ERROR(EIO);
1020
1021 if (sync) {
1022 error = xfs_wait_on_pages(ip, 0, -1);
1023 if (error)
1024 goto out;
1025 }
1026
1027 /*
1028 * Bypass inodes which have already been cleaned by
1029 * the inode flush clustering code inside xfs_iflush
1030 */
1031 if (xfs_inode_clean(ip))
1032 goto out;
1033
1034 /*
1035 * We make this non-blocking if the inode is contended, return
1036 * EAGAIN to indicate to the caller that they did not succeed.
1037 * This prevents the flush path from blocking on inodes inside
1038 * another operation right now, they get caught later by xfs_sync.
1039 */
1040 if (sync) {
1041 xfs_ilock(ip, XFS_ILOCK_SHARED);
1042 xfs_iflock(ip);
1043
1044 error = xfs_iflush(ip, XFS_IFLUSH_SYNC);
1045 } else {
1046 error = EAGAIN;
1047 if (!xfs_ilock_nowait(ip, XFS_ILOCK_SHARED))
1048 goto out;
1049 if (xfs_ipincount(ip) || !xfs_iflock_nowait(ip))
1050 goto out_unlock;
1051
1052 error = xfs_iflush(ip, XFS_IFLUSH_ASYNC_NOBLOCK);
1053 }
1054
1055 out_unlock:
1056 xfs_iunlock(ip, XFS_ILOCK_SHARED);
1057 out:
1058 /*
1059 * if we failed to write out the inode then mark
1060 * it dirty again so we'll try again later.
1061 */
1062 if (error)
1063 xfs_mark_inode_dirty_sync(ip);
1064 return -error;
1065 }
1066
1067 STATIC void
1068 xfs_fs_clear_inode(
1069 struct inode *inode)
1070 {
1071 xfs_inode_t *ip = XFS_I(inode);
1072
1073 xfs_itrace_entry(ip);
1074 XFS_STATS_INC(vn_rele);
1075 XFS_STATS_INC(vn_remove);
1076 XFS_STATS_DEC(vn_active);
1077
1078 xfs_inactive(ip);
1079 }
1080
1081 STATIC void
1082 xfs_free_fsname(
1083 struct xfs_mount *mp)
1084 {
1085 kfree(mp->m_fsname);
1086 kfree(mp->m_rtname);
1087 kfree(mp->m_logname);
1088 }
1089
1090 STATIC void
1091 xfs_fs_put_super(
1092 struct super_block *sb)
1093 {
1094 struct xfs_mount *mp = XFS_M(sb);
1095 struct xfs_inode *rip = mp->m_rootip;
1096 int unmount_event_flags = 0;
1097
1098 xfs_syncd_stop(mp);
1099
1100 if (!(sb->s_flags & MS_RDONLY)) {
1101 /*
1102 * XXX(hch): this should be SYNC_WAIT.
1103 *
1104 * Or more likely not needed at all because the VFS is already
1105 * calling ->sync_fs after shutting down all filestem
1106 * operations and just before calling ->put_super.
1107 */
1108 xfs_sync_data(mp, 0);
1109 xfs_sync_attr(mp, 0);
1110 }
1111
1112 #ifdef HAVE_DMAPI
1113 if (mp->m_flags & XFS_MOUNT_DMAPI) {
1114 unmount_event_flags =
1115 (mp->m_dmevmask & (1 << DM_EVENT_UNMOUNT)) ?
1116 0 : DM_FLAGS_UNWANTED;
1117 /*
1118 * Ignore error from dmapi here, first unmount is not allowed
1119 * to fail anyway, and second we wouldn't want to fail a
1120 * unmount because of dmapi.
1121 */
1122 XFS_SEND_PREUNMOUNT(mp, rip, DM_RIGHT_NULL, rip, DM_RIGHT_NULL,
1123 NULL, NULL, 0, 0, unmount_event_flags);
1124 }
1125 #endif
1126
1127 /*
1128 * Blow away any referenced inode in the filestreams cache.
1129 * This can and will cause log traffic as inodes go inactive
1130 * here.
1131 */
1132 xfs_filestream_unmount(mp);
1133
1134 XFS_bflush(mp->m_ddev_targp);
1135
1136 if (mp->m_flags & XFS_MOUNT_DMAPI) {
1137 XFS_SEND_UNMOUNT(mp, rip, DM_RIGHT_NULL, 0, 0,
1138 unmount_event_flags);
1139 }
1140
1141 xfs_unmountfs(mp);
1142 xfs_freesb(mp);
1143 xfs_icsb_destroy_counters(mp);
1144 xfs_close_devices(mp);
1145 xfs_dmops_put(mp);
1146 xfs_free_fsname(mp);
1147 kfree(mp);
1148 }
1149
1150 STATIC int
1151 xfs_fs_sync_fs(
1152 struct super_block *sb,
1153 int wait)
1154 {
1155 struct xfs_mount *mp = XFS_M(sb);
1156 int error;
1157
1158 /*
1159 * Not much we can do for the first async pass. Writing out the
1160 * superblock would be counter-productive as we are going to redirty
1161 * when writing out other data and metadata (and writing out a single
1162 * block is quite fast anyway).
1163 *
1164 * Try to asynchronously kick off quota syncing at least.
1165 */
1166 if (!wait) {
1167 xfs_qm_sync(mp, SYNC_TRYLOCK);
1168 return 0;
1169 }
1170
1171 error = xfs_quiesce_data(mp);
1172 if (error)
1173 return -error;
1174
1175 if (laptop_mode) {
1176 int prev_sync_seq = mp->m_sync_seq;
1177
1178 /*
1179 * The disk must be active because we're syncing.
1180 * We schedule xfssyncd now (now that the disk is
1181 * active) instead of later (when it might not be).
1182 */
1183 wake_up_process(mp->m_sync_task);
1184 /*
1185 * We have to wait for the sync iteration to complete.
1186 * If we don't, the disk activity caused by the sync
1187 * will come after the sync is completed, and that
1188 * triggers another sync from laptop mode.
1189 */
1190 wait_event(mp->m_wait_single_sync_task,
1191 mp->m_sync_seq != prev_sync_seq);
1192 }
1193
1194 return 0;
1195 }
1196
1197 STATIC int
1198 xfs_fs_statfs(
1199 struct dentry *dentry,
1200 struct kstatfs *statp)
1201 {
1202 struct xfs_mount *mp = XFS_M(dentry->d_sb);
1203 xfs_sb_t *sbp = &mp->m_sb;
1204 struct xfs_inode *ip = XFS_I(dentry->d_inode);
1205 __uint64_t fakeinos, id;
1206 xfs_extlen_t lsize;
1207
1208 statp->f_type = XFS_SB_MAGIC;
1209 statp->f_namelen = MAXNAMELEN - 1;
1210
1211 id = huge_encode_dev(mp->m_ddev_targp->bt_dev);
1212 statp->f_fsid.val[0] = (u32)id;
1213 statp->f_fsid.val[1] = (u32)(id >> 32);
1214
1215 xfs_icsb_sync_counters(mp, XFS_ICSB_LAZY_COUNT);
1216
1217 spin_lock(&mp->m_sb_lock);
1218 statp->f_bsize = sbp->sb_blocksize;
1219 lsize = sbp->sb_logstart ? sbp->sb_logblocks : 0;
1220 statp->f_blocks = sbp->sb_dblocks - lsize;
1221 statp->f_bfree = statp->f_bavail =
1222 sbp->sb_fdblocks - XFS_ALLOC_SET_ASIDE(mp);
1223 fakeinos = statp->f_bfree << sbp->sb_inopblog;
1224 statp->f_files =
1225 MIN(sbp->sb_icount + fakeinos, (__uint64_t)XFS_MAXINUMBER);
1226 if (mp->m_maxicount)
1227 statp->f_files = min_t(typeof(statp->f_files),
1228 statp->f_files,
1229 mp->m_maxicount);
1230 statp->f_ffree = statp->f_files - (sbp->sb_icount - sbp->sb_ifree);
1231 spin_unlock(&mp->m_sb_lock);
1232
1233 if ((ip->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) ||
1234 ((mp->m_qflags & (XFS_PQUOTA_ACCT|XFS_OQUOTA_ENFD))) ==
1235 (XFS_PQUOTA_ACCT|XFS_OQUOTA_ENFD))
1236 xfs_qm_statvfs(ip, statp);
1237 return 0;
1238 }
1239
1240 STATIC int
1241 xfs_fs_remount(
1242 struct super_block *sb,
1243 int *flags,
1244 char *options)
1245 {
1246 struct xfs_mount *mp = XFS_M(sb);
1247 substring_t args[MAX_OPT_ARGS];
1248 char *p;
1249 int error;
1250
1251 while ((p = strsep(&options, ",")) != NULL) {
1252 int token;
1253
1254 if (!*p)
1255 continue;
1256
1257 token = match_token(p, tokens, args);
1258 switch (token) {
1259 case Opt_barrier:
1260 mp->m_flags |= XFS_MOUNT_BARRIER;
1261
1262 /*
1263 * Test if barriers are actually working if we can,
1264 * else delay this check until the filesystem is
1265 * marked writeable.
1266 */
1267 if (!(mp->m_flags & XFS_MOUNT_RDONLY))
1268 xfs_mountfs_check_barriers(mp);
1269 break;
1270 case Opt_nobarrier:
1271 mp->m_flags &= ~XFS_MOUNT_BARRIER;
1272 break;
1273 default:
1274 /*
1275 * Logically we would return an error here to prevent
1276 * users from believing they might have changed
1277 * mount options using remount which can't be changed.
1278 *
1279 * But unfortunately mount(8) adds all options from
1280 * mtab and fstab to the mount arguments in some cases
1281 * so we can't blindly reject options, but have to
1282 * check for each specified option if it actually
1283 * differs from the currently set option and only
1284 * reject it if that's the case.
1285 *
1286 * Until that is implemented we return success for
1287 * every remount request, and silently ignore all
1288 * options that we can't actually change.
1289 */
1290 #if 0
1291 printk(KERN_INFO
1292 "XFS: mount option \"%s\" not supported for remount\n", p);
1293 return -EINVAL;
1294 #else
1295 break;
1296 #endif
1297 }
1298 }
1299
1300 /* ro -> rw */
1301 if ((mp->m_flags & XFS_MOUNT_RDONLY) && !(*flags & MS_RDONLY)) {
1302 mp->m_flags &= ~XFS_MOUNT_RDONLY;
1303 if (mp->m_flags & XFS_MOUNT_BARRIER)
1304 xfs_mountfs_check_barriers(mp);
1305
1306 /*
1307 * If this is the first remount to writeable state we
1308 * might have some superblock changes to update.
1309 */
1310 if (mp->m_update_flags) {
1311 error = xfs_mount_log_sb(mp, mp->m_update_flags);
1312 if (error) {
1313 cmn_err(CE_WARN,
1314 "XFS: failed to write sb changes");
1315 return error;
1316 }
1317 mp->m_update_flags = 0;
1318 }
1319 }
1320
1321 /* rw -> ro */
1322 if (!(mp->m_flags & XFS_MOUNT_RDONLY) && (*flags & MS_RDONLY)) {
1323 xfs_quiesce_data(mp);
1324 xfs_quiesce_attr(mp);
1325 mp->m_flags |= XFS_MOUNT_RDONLY;
1326 }
1327
1328 return 0;
1329 }
1330
1331 /*
1332 * Second stage of a freeze. The data is already frozen so we only
1333 * need to take care of the metadata. Once that's done write a dummy
1334 * record to dirty the log in case of a crash while frozen.
1335 */
1336 STATIC int
1337 xfs_fs_freeze(
1338 struct super_block *sb)
1339 {
1340 struct xfs_mount *mp = XFS_M(sb);
1341
1342 xfs_quiesce_attr(mp);
1343 return -xfs_fs_log_dummy(mp);
1344 }
1345
1346 STATIC int
1347 xfs_fs_show_options(
1348 struct seq_file *m,
1349 struct vfsmount *mnt)
1350 {
1351 return -xfs_showargs(XFS_M(mnt->mnt_sb), m);
1352 }
1353
1354 /*
1355 * This function fills in xfs_mount_t fields based on mount args.
1356 * Note: the superblock _has_ now been read in.
1357 */
1358 STATIC int
1359 xfs_finish_flags(
1360 struct xfs_mount *mp)
1361 {
1362 int ronly = (mp->m_flags & XFS_MOUNT_RDONLY);
1363
1364 /* Fail a mount where the logbuf is smaller than the log stripe */
1365 if (xfs_sb_version_haslogv2(&mp->m_sb)) {
1366 if (mp->m_logbsize <= 0 &&
1367 mp->m_sb.sb_logsunit > XLOG_BIG_RECORD_BSIZE) {
1368 mp->m_logbsize = mp->m_sb.sb_logsunit;
1369 } else if (mp->m_logbsize > 0 &&
1370 mp->m_logbsize < mp->m_sb.sb_logsunit) {
1371 cmn_err(CE_WARN,
1372 "XFS: logbuf size must be greater than or equal to log stripe size");
1373 return XFS_ERROR(EINVAL);
1374 }
1375 } else {
1376 /* Fail a mount if the logbuf is larger than 32K */
1377 if (mp->m_logbsize > XLOG_BIG_RECORD_BSIZE) {
1378 cmn_err(CE_WARN,
1379 "XFS: logbuf size for version 1 logs must be 16K or 32K");
1380 return XFS_ERROR(EINVAL);
1381 }
1382 }
1383
1384 /*
1385 * mkfs'ed attr2 will turn on attr2 mount unless explicitly
1386 * told by noattr2 to turn it off
1387 */
1388 if (xfs_sb_version_hasattr2(&mp->m_sb) &&
1389 !(mp->m_flags & XFS_MOUNT_NOATTR2))
1390 mp->m_flags |= XFS_MOUNT_ATTR2;
1391
1392 /*
1393 * prohibit r/w mounts of read-only filesystems
1394 */
1395 if ((mp->m_sb.sb_flags & XFS_SBF_READONLY) && !ronly) {
1396 cmn_err(CE_WARN,
1397 "XFS: cannot mount a read-only filesystem as read-write");
1398 return XFS_ERROR(EROFS);
1399 }
1400
1401 return 0;
1402 }
1403
1404 STATIC int
1405 xfs_fs_fill_super(
1406 struct super_block *sb,
1407 void *data,
1408 int silent)
1409 {
1410 struct inode *root;
1411 struct xfs_mount *mp = NULL;
1412 int flags = 0, error = ENOMEM;
1413 char *mtpt = NULL;
1414
1415 mp = kzalloc(sizeof(struct xfs_mount), GFP_KERNEL);
1416 if (!mp)
1417 goto out;
1418
1419 spin_lock_init(&mp->m_sb_lock);
1420 mutex_init(&mp->m_growlock);
1421 atomic_set(&mp->m_active_trans, 0);
1422 INIT_LIST_HEAD(&mp->m_sync_list);
1423 spin_lock_init(&mp->m_sync_lock);
1424 init_waitqueue_head(&mp->m_wait_single_sync_task);
1425
1426 mp->m_super = sb;
1427 sb->s_fs_info = mp;
1428
1429 error = xfs_parseargs(mp, (char *)data, &mtpt);
1430 if (error)
1431 goto out_free_fsname;
1432
1433 sb_min_blocksize(sb, BBSIZE);
1434 sb->s_xattr = xfs_xattr_handlers;
1435 sb->s_export_op = &xfs_export_operations;
1436 #ifdef CONFIG_XFS_QUOTA
1437 sb->s_qcop = &xfs_quotactl_operations;
1438 #endif
1439 sb->s_op = &xfs_super_operations;
1440
1441 error = xfs_dmops_get(mp);
1442 if (error)
1443 goto out_free_fsname;
1444
1445 if (silent)
1446 flags |= XFS_MFSI_QUIET;
1447
1448 error = xfs_open_devices(mp);
1449 if (error)
1450 goto out_put_dmops;
1451
1452 if (xfs_icsb_init_counters(mp))
1453 mp->m_flags |= XFS_MOUNT_NO_PERCPU_SB;
1454
1455 error = xfs_readsb(mp, flags);
1456 if (error)
1457 goto out_destroy_counters;
1458
1459 error = xfs_finish_flags(mp);
1460 if (error)
1461 goto out_free_sb;
1462
1463 error = xfs_setup_devices(mp);
1464 if (error)
1465 goto out_free_sb;
1466
1467 if (mp->m_flags & XFS_MOUNT_BARRIER)
1468 xfs_mountfs_check_barriers(mp);
1469
1470 error = xfs_filestream_mount(mp);
1471 if (error)
1472 goto out_free_sb;
1473
1474 error = xfs_mountfs(mp);
1475 if (error)
1476 goto out_filestream_unmount;
1477
1478 XFS_SEND_MOUNT(mp, DM_RIGHT_NULL, mtpt, mp->m_fsname);
1479
1480 sb->s_magic = XFS_SB_MAGIC;
1481 sb->s_blocksize = mp->m_sb.sb_blocksize;
1482 sb->s_blocksize_bits = ffs(sb->s_blocksize) - 1;
1483 sb->s_maxbytes = xfs_max_file_offset(sb->s_blocksize_bits);
1484 sb->s_time_gran = 1;
1485 set_posix_acl_flag(sb);
1486
1487 root = igrab(VFS_I(mp->m_rootip));
1488 if (!root) {
1489 error = ENOENT;
1490 goto fail_unmount;
1491 }
1492 if (is_bad_inode(root)) {
1493 error = EINVAL;
1494 goto fail_vnrele;
1495 }
1496 sb->s_root = d_alloc_root(root);
1497 if (!sb->s_root) {
1498 error = ENOMEM;
1499 goto fail_vnrele;
1500 }
1501
1502 error = xfs_syncd_init(mp);
1503 if (error)
1504 goto fail_vnrele;
1505
1506 kfree(mtpt);
1507
1508 xfs_itrace_exit(XFS_I(sb->s_root->d_inode));
1509 return 0;
1510
1511 out_filestream_unmount:
1512 xfs_filestream_unmount(mp);
1513 out_free_sb:
1514 xfs_freesb(mp);
1515 out_destroy_counters:
1516 xfs_icsb_destroy_counters(mp);
1517 xfs_close_devices(mp);
1518 out_put_dmops:
1519 xfs_dmops_put(mp);
1520 out_free_fsname:
1521 xfs_free_fsname(mp);
1522 kfree(mtpt);
1523 kfree(mp);
1524 out:
1525 return -error;
1526
1527 fail_vnrele:
1528 if (sb->s_root) {
1529 dput(sb->s_root);
1530 sb->s_root = NULL;
1531 } else {
1532 iput(root);
1533 }
1534
1535 fail_unmount:
1536 /*
1537 * Blow away any referenced inode in the filestreams cache.
1538 * This can and will cause log traffic as inodes go inactive
1539 * here.
1540 */
1541 xfs_filestream_unmount(mp);
1542
1543 XFS_bflush(mp->m_ddev_targp);
1544
1545 xfs_unmountfs(mp);
1546 goto out_free_sb;
1547 }
1548
1549 STATIC int
1550 xfs_fs_get_sb(
1551 struct file_system_type *fs_type,
1552 int flags,
1553 const char *dev_name,
1554 void *data,
1555 struct vfsmount *mnt)
1556 {
1557 return get_sb_bdev(fs_type, flags, dev_name, data, xfs_fs_fill_super,
1558 mnt);
1559 }
1560
1561 static const struct super_operations xfs_super_operations = {
1562 .alloc_inode = xfs_fs_alloc_inode,
1563 .destroy_inode = xfs_fs_destroy_inode,
1564 .dirty_inode = xfs_fs_dirty_inode,
1565 .write_inode = xfs_fs_write_inode,
1566 .clear_inode = xfs_fs_clear_inode,
1567 .put_super = xfs_fs_put_super,
1568 .sync_fs = xfs_fs_sync_fs,
1569 .freeze_fs = xfs_fs_freeze,
1570 .statfs = xfs_fs_statfs,
1571 .remount_fs = xfs_fs_remount,
1572 .show_options = xfs_fs_show_options,
1573 };
1574
1575 static struct file_system_type xfs_fs_type = {
1576 .owner = THIS_MODULE,
1577 .name = "xfs",
1578 .get_sb = xfs_fs_get_sb,
1579 .kill_sb = kill_block_super,
1580 .fs_flags = FS_REQUIRES_DEV,
1581 };
1582
1583 STATIC int __init
1584 xfs_alloc_trace_bufs(void)
1585 {
1586 #ifdef XFS_ALLOC_TRACE
1587 xfs_alloc_trace_buf = ktrace_alloc(XFS_ALLOC_TRACE_SIZE, KM_MAYFAIL);
1588 if (!xfs_alloc_trace_buf)
1589 goto out;
1590 #endif
1591 #ifdef XFS_BMAP_TRACE
1592 xfs_bmap_trace_buf = ktrace_alloc(XFS_BMAP_TRACE_SIZE, KM_MAYFAIL);
1593 if (!xfs_bmap_trace_buf)
1594 goto out_free_alloc_trace;
1595 #endif
1596 #ifdef XFS_BTREE_TRACE
1597 xfs_allocbt_trace_buf = ktrace_alloc(XFS_ALLOCBT_TRACE_SIZE,
1598 KM_MAYFAIL);
1599 if (!xfs_allocbt_trace_buf)
1600 goto out_free_bmap_trace;
1601
1602 xfs_inobt_trace_buf = ktrace_alloc(XFS_INOBT_TRACE_SIZE, KM_MAYFAIL);
1603 if (!xfs_inobt_trace_buf)
1604 goto out_free_allocbt_trace;
1605
1606 xfs_bmbt_trace_buf = ktrace_alloc(XFS_BMBT_TRACE_SIZE, KM_MAYFAIL);
1607 if (!xfs_bmbt_trace_buf)
1608 goto out_free_inobt_trace;
1609 #endif
1610 #ifdef XFS_ATTR_TRACE
1611 xfs_attr_trace_buf = ktrace_alloc(XFS_ATTR_TRACE_SIZE, KM_MAYFAIL);
1612 if (!xfs_attr_trace_buf)
1613 goto out_free_bmbt_trace;
1614 #endif
1615 #ifdef XFS_DIR2_TRACE
1616 xfs_dir2_trace_buf = ktrace_alloc(XFS_DIR2_GTRACE_SIZE, KM_MAYFAIL);
1617 if (!xfs_dir2_trace_buf)
1618 goto out_free_attr_trace;
1619 #endif
1620
1621 return 0;
1622
1623 #ifdef XFS_DIR2_TRACE
1624 out_free_attr_trace:
1625 #endif
1626 #ifdef XFS_ATTR_TRACE
1627 ktrace_free(xfs_attr_trace_buf);
1628 out_free_bmbt_trace:
1629 #endif
1630 #ifdef XFS_BTREE_TRACE
1631 ktrace_free(xfs_bmbt_trace_buf);
1632 out_free_inobt_trace:
1633 ktrace_free(xfs_inobt_trace_buf);
1634 out_free_allocbt_trace:
1635 ktrace_free(xfs_allocbt_trace_buf);
1636 out_free_bmap_trace:
1637 #endif
1638 #ifdef XFS_BMAP_TRACE
1639 ktrace_free(xfs_bmap_trace_buf);
1640 out_free_alloc_trace:
1641 #endif
1642 #ifdef XFS_ALLOC_TRACE
1643 ktrace_free(xfs_alloc_trace_buf);
1644 out:
1645 #endif
1646 return -ENOMEM;
1647 }
1648
1649 STATIC void
1650 xfs_free_trace_bufs(void)
1651 {
1652 #ifdef XFS_DIR2_TRACE
1653 ktrace_free(xfs_dir2_trace_buf);
1654 #endif
1655 #ifdef XFS_ATTR_TRACE
1656 ktrace_free(xfs_attr_trace_buf);
1657 #endif
1658 #ifdef XFS_BTREE_TRACE
1659 ktrace_free(xfs_bmbt_trace_buf);
1660 ktrace_free(xfs_inobt_trace_buf);
1661 ktrace_free(xfs_allocbt_trace_buf);
1662 #endif
1663 #ifdef XFS_BMAP_TRACE
1664 ktrace_free(xfs_bmap_trace_buf);
1665 #endif
1666 #ifdef XFS_ALLOC_TRACE
1667 ktrace_free(xfs_alloc_trace_buf);
1668 #endif
1669 }
1670
1671 STATIC int __init
1672 xfs_init_zones(void)
1673 {
1674
1675 xfs_ioend_zone = kmem_zone_init(sizeof(xfs_ioend_t), "xfs_ioend");
1676 if (!xfs_ioend_zone)
1677 goto out;
1678
1679 xfs_ioend_pool = mempool_create_slab_pool(4 * MAX_BUF_PER_PAGE,
1680 xfs_ioend_zone);
1681 if (!xfs_ioend_pool)
1682 goto out_destroy_ioend_zone;
1683
1684 xfs_log_ticket_zone = kmem_zone_init(sizeof(xlog_ticket_t),
1685 "xfs_log_ticket");
1686 if (!xfs_log_ticket_zone)
1687 goto out_destroy_ioend_pool;
1688
1689 xfs_bmap_free_item_zone = kmem_zone_init(sizeof(xfs_bmap_free_item_t),
1690 "xfs_bmap_free_item");
1691 if (!xfs_bmap_free_item_zone)
1692 goto out_destroy_log_ticket_zone;
1693
1694 xfs_btree_cur_zone = kmem_zone_init(sizeof(xfs_btree_cur_t),
1695 "xfs_btree_cur");
1696 if (!xfs_btree_cur_zone)
1697 goto out_destroy_bmap_free_item_zone;
1698
1699 xfs_da_state_zone = kmem_zone_init(sizeof(xfs_da_state_t),
1700 "xfs_da_state");
1701 if (!xfs_da_state_zone)
1702 goto out_destroy_btree_cur_zone;
1703
1704 xfs_dabuf_zone = kmem_zone_init(sizeof(xfs_dabuf_t), "xfs_dabuf");
1705 if (!xfs_dabuf_zone)
1706 goto out_destroy_da_state_zone;
1707
1708 xfs_ifork_zone = kmem_zone_init(sizeof(xfs_ifork_t), "xfs_ifork");
1709 if (!xfs_ifork_zone)
1710 goto out_destroy_dabuf_zone;
1711
1712 xfs_trans_zone = kmem_zone_init(sizeof(xfs_trans_t), "xfs_trans");
1713 if (!xfs_trans_zone)
1714 goto out_destroy_ifork_zone;
1715
1716 /*
1717 * The size of the zone allocated buf log item is the maximum
1718 * size possible under XFS. This wastes a little bit of memory,
1719 * but it is much faster.
1720 */
1721 xfs_buf_item_zone = kmem_zone_init((sizeof(xfs_buf_log_item_t) +
1722 (((XFS_MAX_BLOCKSIZE / XFS_BLI_CHUNK) /
1723 NBWORD) * sizeof(int))), "xfs_buf_item");
1724 if (!xfs_buf_item_zone)
1725 goto out_destroy_trans_zone;
1726
1727 xfs_efd_zone = kmem_zone_init((sizeof(xfs_efd_log_item_t) +
1728 ((XFS_EFD_MAX_FAST_EXTENTS - 1) *
1729 sizeof(xfs_extent_t))), "xfs_efd_item");
1730 if (!xfs_efd_zone)
1731 goto out_destroy_buf_item_zone;
1732
1733 xfs_efi_zone = kmem_zone_init((sizeof(xfs_efi_log_item_t) +
1734 ((XFS_EFI_MAX_FAST_EXTENTS - 1) *
1735 sizeof(xfs_extent_t))), "xfs_efi_item");
1736 if (!xfs_efi_zone)
1737 goto out_destroy_efd_zone;
1738
1739 xfs_inode_zone =
1740 kmem_zone_init_flags(sizeof(xfs_inode_t), "xfs_inode",
1741 KM_ZONE_HWALIGN | KM_ZONE_RECLAIM | KM_ZONE_SPREAD,
1742 xfs_fs_inode_init_once);
1743 if (!xfs_inode_zone)
1744 goto out_destroy_efi_zone;
1745
1746 xfs_ili_zone =
1747 kmem_zone_init_flags(sizeof(xfs_inode_log_item_t), "xfs_ili",
1748 KM_ZONE_SPREAD, NULL);
1749 if (!xfs_ili_zone)
1750 goto out_destroy_inode_zone;
1751
1752 return 0;
1753
1754 out_destroy_inode_zone:
1755 kmem_zone_destroy(xfs_inode_zone);
1756 out_destroy_efi_zone:
1757 kmem_zone_destroy(xfs_efi_zone);
1758 out_destroy_efd_zone:
1759 kmem_zone_destroy(xfs_efd_zone);
1760 out_destroy_buf_item_zone:
1761 kmem_zone_destroy(xfs_buf_item_zone);
1762 out_destroy_trans_zone:
1763 kmem_zone_destroy(xfs_trans_zone);
1764 out_destroy_ifork_zone:
1765 kmem_zone_destroy(xfs_ifork_zone);
1766 out_destroy_dabuf_zone:
1767 kmem_zone_destroy(xfs_dabuf_zone);
1768 out_destroy_da_state_zone:
1769 kmem_zone_destroy(xfs_da_state_zone);
1770 out_destroy_btree_cur_zone:
1771 kmem_zone_destroy(xfs_btree_cur_zone);
1772 out_destroy_bmap_free_item_zone:
1773 kmem_zone_destroy(xfs_bmap_free_item_zone);
1774 out_destroy_log_ticket_zone:
1775 kmem_zone_destroy(xfs_log_ticket_zone);
1776 out_destroy_ioend_pool:
1777 mempool_destroy(xfs_ioend_pool);
1778 out_destroy_ioend_zone:
1779 kmem_zone_destroy(xfs_ioend_zone);
1780 out:
1781 return -ENOMEM;
1782 }
1783
1784 STATIC void
1785 xfs_destroy_zones(void)
1786 {
1787 kmem_zone_destroy(xfs_ili_zone);
1788 kmem_zone_destroy(xfs_inode_zone);
1789 kmem_zone_destroy(xfs_efi_zone);
1790 kmem_zone_destroy(xfs_efd_zone);
1791 kmem_zone_destroy(xfs_buf_item_zone);
1792 kmem_zone_destroy(xfs_trans_zone);
1793 kmem_zone_destroy(xfs_ifork_zone);
1794 kmem_zone_destroy(xfs_dabuf_zone);
1795 kmem_zone_destroy(xfs_da_state_zone);
1796 kmem_zone_destroy(xfs_btree_cur_zone);
1797 kmem_zone_destroy(xfs_bmap_free_item_zone);
1798 kmem_zone_destroy(xfs_log_ticket_zone);
1799 mempool_destroy(xfs_ioend_pool);
1800 kmem_zone_destroy(xfs_ioend_zone);
1801
1802 }
1803
1804 STATIC int __init
1805 init_xfs_fs(void)
1806 {
1807 int error;
1808
1809 printk(KERN_INFO XFS_VERSION_STRING " with "
1810 XFS_BUILD_OPTIONS " enabled\n");
1811
1812 ktrace_init(64);
1813 xfs_ioend_init();
1814 xfs_dir_startup();
1815
1816 error = xfs_init_zones();
1817 if (error)
1818 goto out;
1819
1820 error = xfs_alloc_trace_bufs();
1821 if (error)
1822 goto out_destroy_zones;
1823
1824 error = xfs_mru_cache_init();
1825 if (error)
1826 goto out_free_trace_buffers;
1827
1828 error = xfs_filestream_init();
1829 if (error)
1830 goto out_mru_cache_uninit;
1831
1832 error = xfs_buf_init();
1833 if (error)
1834 goto out_filestream_uninit;
1835
1836 error = xfs_init_procfs();
1837 if (error)
1838 goto out_buf_terminate;
1839
1840 error = xfs_sysctl_register();
1841 if (error)
1842 goto out_cleanup_procfs;
1843
1844 vfs_initquota();
1845
1846 error = register_filesystem(&xfs_fs_type);
1847 if (error)
1848 goto out_sysctl_unregister;
1849 return 0;
1850
1851 out_sysctl_unregister:
1852 xfs_sysctl_unregister();
1853 out_cleanup_procfs:
1854 xfs_cleanup_procfs();
1855 out_buf_terminate:
1856 xfs_buf_terminate();
1857 out_filestream_uninit:
1858 xfs_filestream_uninit();
1859 out_mru_cache_uninit:
1860 xfs_mru_cache_uninit();
1861 out_free_trace_buffers:
1862 xfs_free_trace_bufs();
1863 out_destroy_zones:
1864 xfs_destroy_zones();
1865 out:
1866 return error;
1867 }
1868
1869 STATIC void __exit
1870 exit_xfs_fs(void)
1871 {
1872 vfs_exitquota();
1873 unregister_filesystem(&xfs_fs_type);
1874 xfs_sysctl_unregister();
1875 xfs_cleanup_procfs();
1876 xfs_buf_terminate();
1877 xfs_filestream_uninit();
1878 xfs_mru_cache_uninit();
1879 xfs_free_trace_bufs();
1880 xfs_destroy_zones();
1881 ktrace_uninit();
1882 }
1883
1884 module_init(init_xfs_fs);
1885 module_exit(exit_xfs_fs);
1886
1887 MODULE_AUTHOR("Silicon Graphics, Inc.");
1888 MODULE_DESCRIPTION(XFS_VERSION_STRING " with " XFS_BUILD_OPTIONS " enabled");
1889 MODULE_LICENSE("GPL");
Linux with added FPC-III support