[XFS] Fix up noattr2 so that it will properly update the versionnum and
[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_clnt.h"
22 #include "xfs_inum.h"
23 #include "xfs_trans.h"
24 #include "xfs_sb.h"
25 #include "xfs_ag.h"
26 #include "xfs_dir2.h"
27 #include "xfs_alloc.h"
28 #include "xfs_dmapi.h"
29 #include "xfs_quota.h"
30 #include "xfs_mount.h"
31 #include "xfs_bmap_btree.h"
32 #include "xfs_alloc_btree.h"
33 #include "xfs_ialloc_btree.h"
34 #include "xfs_dir2_sf.h"
35 #include "xfs_attr_sf.h"
36 #include "xfs_dinode.h"
37 #include "xfs_inode.h"
38 #include "xfs_btree.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_vfsops.h"
52 #include "xfs_version.h"
53 #include "xfs_log_priv.h"
54 #include "xfs_trans_priv.h"
55
56 #include <linux/namei.h>
57 #include <linux/init.h>
58 #include <linux/mount.h>
59 #include <linux/mempool.h>
60 #include <linux/writeback.h>
61 #include <linux/kthread.h>
62 #include <linux/freezer.h>
63
64 static struct quotactl_ops xfs_quotactl_operations;
65 static struct super_operations xfs_super_operations;
66 static kmem_zone_t *xfs_vnode_zone;
67 static kmem_zone_t *xfs_ioend_zone;
68 mempool_t *xfs_ioend_pool;
69
70 STATIC struct xfs_mount_args *
71 xfs_args_allocate(
72 struct super_block *sb,
73 int silent)
74 {
75 struct xfs_mount_args *args;
76
77 args = kmem_zalloc(sizeof(struct xfs_mount_args), KM_SLEEP);
78 args->logbufs = args->logbufsize = -1;
79 strncpy(args->fsname, sb->s_id, MAXNAMELEN);
80
81 /* Copy the already-parsed mount(2) flags we're interested in */
82 if (sb->s_flags & MS_DIRSYNC)
83 args->flags |= XFSMNT_DIRSYNC;
84 if (sb->s_flags & MS_SYNCHRONOUS)
85 args->flags |= XFSMNT_WSYNC;
86 if (silent)
87 args->flags |= XFSMNT_QUIET;
88 args->flags |= XFSMNT_32BITINODES;
89
90 return args;
91 }
92
93 #define MNTOPT_LOGBUFS "logbufs" /* number of XFS log buffers */
94 #define MNTOPT_LOGBSIZE "logbsize" /* size of XFS log buffers */
95 #define MNTOPT_LOGDEV "logdev" /* log device */
96 #define MNTOPT_RTDEV "rtdev" /* realtime I/O device */
97 #define MNTOPT_BIOSIZE "biosize" /* log2 of preferred buffered io size */
98 #define MNTOPT_WSYNC "wsync" /* safe-mode nfs compatible mount */
99 #define MNTOPT_INO64 "ino64" /* force inodes into 64-bit range */
100 #define MNTOPT_NOALIGN "noalign" /* turn off stripe alignment */
101 #define MNTOPT_SWALLOC "swalloc" /* turn on stripe width allocation */
102 #define MNTOPT_SUNIT "sunit" /* data volume stripe unit */
103 #define MNTOPT_SWIDTH "swidth" /* data volume stripe width */
104 #define MNTOPT_NOUUID "nouuid" /* ignore filesystem UUID */
105 #define MNTOPT_MTPT "mtpt" /* filesystem mount point */
106 #define MNTOPT_GRPID "grpid" /* group-ID from parent directory */
107 #define MNTOPT_NOGRPID "nogrpid" /* group-ID from current process */
108 #define MNTOPT_BSDGROUPS "bsdgroups" /* group-ID from parent directory */
109 #define MNTOPT_SYSVGROUPS "sysvgroups" /* group-ID from current process */
110 #define MNTOPT_ALLOCSIZE "allocsize" /* preferred allocation size */
111 #define MNTOPT_NORECOVERY "norecovery" /* don't run XFS recovery */
112 #define MNTOPT_BARRIER "barrier" /* use writer barriers for log write and
113 * unwritten extent conversion */
114 #define MNTOPT_NOBARRIER "nobarrier" /* .. disable */
115 #define MNTOPT_OSYNCISOSYNC "osyncisosync" /* o_sync is REALLY o_sync */
116 #define MNTOPT_64BITINODE "inode64" /* inodes can be allocated anywhere */
117 #define MNTOPT_IKEEP "ikeep" /* do not free empty inode clusters */
118 #define MNTOPT_NOIKEEP "noikeep" /* free empty inode clusters */
119 #define MNTOPT_LARGEIO "largeio" /* report large I/O sizes in stat() */
120 #define MNTOPT_NOLARGEIO "nolargeio" /* do not report large I/O sizes
121 * in stat(). */
122 #define MNTOPT_ATTR2 "attr2" /* do use attr2 attribute format */
123 #define MNTOPT_NOATTR2 "noattr2" /* do not use attr2 attribute format */
124 #define MNTOPT_FILESTREAM "filestreams" /* use filestreams allocator */
125 #define MNTOPT_QUOTA "quota" /* disk quotas (user) */
126 #define MNTOPT_NOQUOTA "noquota" /* no quotas */
127 #define MNTOPT_USRQUOTA "usrquota" /* user quota enabled */
128 #define MNTOPT_GRPQUOTA "grpquota" /* group quota enabled */
129 #define MNTOPT_PRJQUOTA "prjquota" /* project quota enabled */
130 #define MNTOPT_UQUOTA "uquota" /* user quota (IRIX variant) */
131 #define MNTOPT_GQUOTA "gquota" /* group quota (IRIX variant) */
132 #define MNTOPT_PQUOTA "pquota" /* project quota (IRIX variant) */
133 #define MNTOPT_UQUOTANOENF "uqnoenforce"/* user quota limit enforcement */
134 #define MNTOPT_GQUOTANOENF "gqnoenforce"/* group quota limit enforcement */
135 #define MNTOPT_PQUOTANOENF "pqnoenforce"/* project quota limit enforcement */
136 #define MNTOPT_QUOTANOENF "qnoenforce" /* same as uqnoenforce */
137 #define MNTOPT_DMAPI "dmapi" /* DMI enabled (DMAPI / XDSM) */
138 #define MNTOPT_XDSM "xdsm" /* DMI enabled (DMAPI / XDSM) */
139 #define MNTOPT_DMI "dmi" /* DMI enabled (DMAPI / XDSM) */
140
141 STATIC unsigned long
142 suffix_strtoul(char *s, char **endp, unsigned int base)
143 {
144 int last, shift_left_factor = 0;
145 char *value = s;
146
147 last = strlen(value) - 1;
148 if (value[last] == 'K' || value[last] == 'k') {
149 shift_left_factor = 10;
150 value[last] = '\0';
151 }
152 if (value[last] == 'M' || value[last] == 'm') {
153 shift_left_factor = 20;
154 value[last] = '\0';
155 }
156 if (value[last] == 'G' || value[last] == 'g') {
157 shift_left_factor = 30;
158 value[last] = '\0';
159 }
160
161 return simple_strtoul((const char *)s, endp, base) << shift_left_factor;
162 }
163
164 STATIC int
165 xfs_parseargs(
166 struct xfs_mount *mp,
167 char *options,
168 struct xfs_mount_args *args,
169 int update)
170 {
171 char *this_char, *value, *eov;
172 int dsunit, dswidth, vol_dsunit, vol_dswidth;
173 int iosize;
174 int dmapi_implies_ikeep = 1;
175
176 args->flags |= XFSMNT_BARRIER;
177 args->flags2 |= XFSMNT2_COMPAT_IOSIZE;
178
179 if (!options)
180 goto done;
181
182 iosize = dsunit = dswidth = vol_dsunit = vol_dswidth = 0;
183
184 while ((this_char = strsep(&options, ",")) != NULL) {
185 if (!*this_char)
186 continue;
187 if ((value = strchr(this_char, '=')) != NULL)
188 *value++ = 0;
189
190 if (!strcmp(this_char, MNTOPT_LOGBUFS)) {
191 if (!value || !*value) {
192 cmn_err(CE_WARN,
193 "XFS: %s option requires an argument",
194 this_char);
195 return EINVAL;
196 }
197 args->logbufs = simple_strtoul(value, &eov, 10);
198 } else if (!strcmp(this_char, MNTOPT_LOGBSIZE)) {
199 if (!value || !*value) {
200 cmn_err(CE_WARN,
201 "XFS: %s option requires an argument",
202 this_char);
203 return EINVAL;
204 }
205 args->logbufsize = suffix_strtoul(value, &eov, 10);
206 } else if (!strcmp(this_char, MNTOPT_LOGDEV)) {
207 if (!value || !*value) {
208 cmn_err(CE_WARN,
209 "XFS: %s option requires an argument",
210 this_char);
211 return EINVAL;
212 }
213 strncpy(args->logname, value, MAXNAMELEN);
214 } else if (!strcmp(this_char, MNTOPT_MTPT)) {
215 if (!value || !*value) {
216 cmn_err(CE_WARN,
217 "XFS: %s option requires an argument",
218 this_char);
219 return EINVAL;
220 }
221 strncpy(args->mtpt, value, MAXNAMELEN);
222 } else if (!strcmp(this_char, MNTOPT_RTDEV)) {
223 if (!value || !*value) {
224 cmn_err(CE_WARN,
225 "XFS: %s option requires an argument",
226 this_char);
227 return EINVAL;
228 }
229 strncpy(args->rtname, value, MAXNAMELEN);
230 } else if (!strcmp(this_char, MNTOPT_BIOSIZE)) {
231 if (!value || !*value) {
232 cmn_err(CE_WARN,
233 "XFS: %s option requires an argument",
234 this_char);
235 return EINVAL;
236 }
237 iosize = simple_strtoul(value, &eov, 10);
238 args->flags |= XFSMNT_IOSIZE;
239 args->iosizelog = (uint8_t) iosize;
240 } else if (!strcmp(this_char, MNTOPT_ALLOCSIZE)) {
241 if (!value || !*value) {
242 cmn_err(CE_WARN,
243 "XFS: %s option requires an argument",
244 this_char);
245 return EINVAL;
246 }
247 iosize = suffix_strtoul(value, &eov, 10);
248 args->flags |= XFSMNT_IOSIZE;
249 args->iosizelog = ffs(iosize) - 1;
250 } else if (!strcmp(this_char, MNTOPT_GRPID) ||
251 !strcmp(this_char, MNTOPT_BSDGROUPS)) {
252 mp->m_flags |= XFS_MOUNT_GRPID;
253 } else if (!strcmp(this_char, MNTOPT_NOGRPID) ||
254 !strcmp(this_char, MNTOPT_SYSVGROUPS)) {
255 mp->m_flags &= ~XFS_MOUNT_GRPID;
256 } else if (!strcmp(this_char, MNTOPT_WSYNC)) {
257 args->flags |= XFSMNT_WSYNC;
258 } else if (!strcmp(this_char, MNTOPT_OSYNCISOSYNC)) {
259 args->flags |= XFSMNT_OSYNCISOSYNC;
260 } else if (!strcmp(this_char, MNTOPT_NORECOVERY)) {
261 args->flags |= XFSMNT_NORECOVERY;
262 } else if (!strcmp(this_char, MNTOPT_INO64)) {
263 args->flags |= XFSMNT_INO64;
264 #if !XFS_BIG_INUMS
265 cmn_err(CE_WARN,
266 "XFS: %s option not allowed on this system",
267 this_char);
268 return EINVAL;
269 #endif
270 } else if (!strcmp(this_char, MNTOPT_NOALIGN)) {
271 args->flags |= XFSMNT_NOALIGN;
272 } else if (!strcmp(this_char, MNTOPT_SWALLOC)) {
273 args->flags |= XFSMNT_SWALLOC;
274 } else if (!strcmp(this_char, MNTOPT_SUNIT)) {
275 if (!value || !*value) {
276 cmn_err(CE_WARN,
277 "XFS: %s option requires an argument",
278 this_char);
279 return EINVAL;
280 }
281 dsunit = simple_strtoul(value, &eov, 10);
282 } else if (!strcmp(this_char, MNTOPT_SWIDTH)) {
283 if (!value || !*value) {
284 cmn_err(CE_WARN,
285 "XFS: %s option requires an argument",
286 this_char);
287 return EINVAL;
288 }
289 dswidth = simple_strtoul(value, &eov, 10);
290 } else if (!strcmp(this_char, MNTOPT_64BITINODE)) {
291 args->flags &= ~XFSMNT_32BITINODES;
292 #if !XFS_BIG_INUMS
293 cmn_err(CE_WARN,
294 "XFS: %s option not allowed on this system",
295 this_char);
296 return EINVAL;
297 #endif
298 } else if (!strcmp(this_char, MNTOPT_NOUUID)) {
299 args->flags |= XFSMNT_NOUUID;
300 } else if (!strcmp(this_char, MNTOPT_BARRIER)) {
301 args->flags |= XFSMNT_BARRIER;
302 } else if (!strcmp(this_char, MNTOPT_NOBARRIER)) {
303 args->flags &= ~XFSMNT_BARRIER;
304 } else if (!strcmp(this_char, MNTOPT_IKEEP)) {
305 args->flags |= XFSMNT_IKEEP;
306 } else if (!strcmp(this_char, MNTOPT_NOIKEEP)) {
307 dmapi_implies_ikeep = 0;
308 args->flags &= ~XFSMNT_IKEEP;
309 } else if (!strcmp(this_char, MNTOPT_LARGEIO)) {
310 args->flags2 &= ~XFSMNT2_COMPAT_IOSIZE;
311 } else if (!strcmp(this_char, MNTOPT_NOLARGEIO)) {
312 args->flags2 |= XFSMNT2_COMPAT_IOSIZE;
313 } else if (!strcmp(this_char, MNTOPT_ATTR2)) {
314 args->flags |= XFSMNT_ATTR2;
315 } else if (!strcmp(this_char, MNTOPT_NOATTR2)) {
316 args->flags &= ~XFSMNT_ATTR2;
317 args->flags |= XFSMNT_NOATTR2;
318 } else if (!strcmp(this_char, MNTOPT_FILESTREAM)) {
319 args->flags2 |= XFSMNT2_FILESTREAMS;
320 } else if (!strcmp(this_char, MNTOPT_NOQUOTA)) {
321 args->flags &= ~(XFSMNT_UQUOTAENF|XFSMNT_UQUOTA);
322 args->flags &= ~(XFSMNT_GQUOTAENF|XFSMNT_GQUOTA);
323 } else if (!strcmp(this_char, MNTOPT_QUOTA) ||
324 !strcmp(this_char, MNTOPT_UQUOTA) ||
325 !strcmp(this_char, MNTOPT_USRQUOTA)) {
326 args->flags |= XFSMNT_UQUOTA | XFSMNT_UQUOTAENF;
327 } else if (!strcmp(this_char, MNTOPT_QUOTANOENF) ||
328 !strcmp(this_char, MNTOPT_UQUOTANOENF)) {
329 args->flags |= XFSMNT_UQUOTA;
330 args->flags &= ~XFSMNT_UQUOTAENF;
331 } else if (!strcmp(this_char, MNTOPT_PQUOTA) ||
332 !strcmp(this_char, MNTOPT_PRJQUOTA)) {
333 args->flags |= XFSMNT_PQUOTA | XFSMNT_PQUOTAENF;
334 } else if (!strcmp(this_char, MNTOPT_PQUOTANOENF)) {
335 args->flags |= XFSMNT_PQUOTA;
336 args->flags &= ~XFSMNT_PQUOTAENF;
337 } else if (!strcmp(this_char, MNTOPT_GQUOTA) ||
338 !strcmp(this_char, MNTOPT_GRPQUOTA)) {
339 args->flags |= XFSMNT_GQUOTA | XFSMNT_GQUOTAENF;
340 } else if (!strcmp(this_char, MNTOPT_GQUOTANOENF)) {
341 args->flags |= XFSMNT_GQUOTA;
342 args->flags &= ~XFSMNT_GQUOTAENF;
343 } else if (!strcmp(this_char, MNTOPT_DMAPI)) {
344 args->flags |= XFSMNT_DMAPI;
345 } else if (!strcmp(this_char, MNTOPT_XDSM)) {
346 args->flags |= XFSMNT_DMAPI;
347 } else if (!strcmp(this_char, MNTOPT_DMI)) {
348 args->flags |= XFSMNT_DMAPI;
349 } else if (!strcmp(this_char, "ihashsize")) {
350 cmn_err(CE_WARN,
351 "XFS: ihashsize no longer used, option is deprecated.");
352 } else if (!strcmp(this_char, "osyncisdsync")) {
353 /* no-op, this is now the default */
354 cmn_err(CE_WARN,
355 "XFS: osyncisdsync is now the default, option is deprecated.");
356 } else if (!strcmp(this_char, "irixsgid")) {
357 cmn_err(CE_WARN,
358 "XFS: irixsgid is now a sysctl(2) variable, option is deprecated.");
359 } else {
360 cmn_err(CE_WARN,
361 "XFS: unknown mount option [%s].", this_char);
362 return EINVAL;
363 }
364 }
365
366 if (args->flags & XFSMNT_NORECOVERY) {
367 if ((mp->m_flags & XFS_MOUNT_RDONLY) == 0) {
368 cmn_err(CE_WARN,
369 "XFS: no-recovery mounts must be read-only.");
370 return EINVAL;
371 }
372 }
373
374 if ((args->flags & XFSMNT_NOALIGN) && (dsunit || dswidth)) {
375 cmn_err(CE_WARN,
376 "XFS: sunit and swidth options incompatible with the noalign option");
377 return EINVAL;
378 }
379
380 if ((args->flags & XFSMNT_GQUOTA) && (args->flags & XFSMNT_PQUOTA)) {
381 cmn_err(CE_WARN,
382 "XFS: cannot mount with both project and group quota");
383 return EINVAL;
384 }
385
386 if ((args->flags & XFSMNT_DMAPI) && *args->mtpt == '\0') {
387 printk("XFS: %s option needs the mount point option as well\n",
388 MNTOPT_DMAPI);
389 return EINVAL;
390 }
391
392 if ((dsunit && !dswidth) || (!dsunit && dswidth)) {
393 cmn_err(CE_WARN,
394 "XFS: sunit and swidth must be specified together");
395 return EINVAL;
396 }
397
398 if (dsunit && (dswidth % dsunit != 0)) {
399 cmn_err(CE_WARN,
400 "XFS: stripe width (%d) must be a multiple of the stripe unit (%d)",
401 dswidth, dsunit);
402 return EINVAL;
403 }
404
405 /*
406 * Applications using DMI filesystems often expect the
407 * inode generation number to be monotonically increasing.
408 * If we delete inode chunks we break this assumption, so
409 * keep unused inode chunks on disk for DMI filesystems
410 * until we come up with a better solution.
411 * Note that if "ikeep" or "noikeep" mount options are
412 * supplied, then they are honored.
413 */
414 if ((args->flags & XFSMNT_DMAPI) && dmapi_implies_ikeep)
415 args->flags |= XFSMNT_IKEEP;
416
417 if ((args->flags & XFSMNT_NOALIGN) != XFSMNT_NOALIGN) {
418 if (dsunit) {
419 args->sunit = dsunit;
420 args->flags |= XFSMNT_RETERR;
421 } else {
422 args->sunit = vol_dsunit;
423 }
424 dswidth ? (args->swidth = dswidth) :
425 (args->swidth = vol_dswidth);
426 } else {
427 args->sunit = args->swidth = 0;
428 }
429
430 done:
431 if (args->flags & XFSMNT_32BITINODES)
432 mp->m_flags |= XFS_MOUNT_SMALL_INUMS;
433 if (args->flags2)
434 args->flags |= XFSMNT_FLAGS2;
435 return 0;
436 }
437
438 struct proc_xfs_info {
439 int flag;
440 char *str;
441 };
442
443 STATIC int
444 xfs_showargs(
445 struct xfs_mount *mp,
446 struct seq_file *m)
447 {
448 static struct proc_xfs_info xfs_info_set[] = {
449 /* the few simple ones we can get from the mount struct */
450 { XFS_MOUNT_IKEEP, "," MNTOPT_IKEEP },
451 { XFS_MOUNT_WSYNC, "," MNTOPT_WSYNC },
452 { XFS_MOUNT_INO64, "," MNTOPT_INO64 },
453 { XFS_MOUNT_NOALIGN, "," MNTOPT_NOALIGN },
454 { XFS_MOUNT_SWALLOC, "," MNTOPT_SWALLOC },
455 { XFS_MOUNT_NOUUID, "," MNTOPT_NOUUID },
456 { XFS_MOUNT_NORECOVERY, "," MNTOPT_NORECOVERY },
457 { XFS_MOUNT_OSYNCISOSYNC, "," MNTOPT_OSYNCISOSYNC },
458 { XFS_MOUNT_ATTR2, "," MNTOPT_ATTR2 },
459 { XFS_MOUNT_FILESTREAMS, "," MNTOPT_FILESTREAM },
460 { XFS_MOUNT_DMAPI, "," MNTOPT_DMAPI },
461 { XFS_MOUNT_GRPID, "," MNTOPT_GRPID },
462 { 0, NULL }
463 };
464 static struct proc_xfs_info xfs_info_unset[] = {
465 /* the few simple ones we can get from the mount struct */
466 { XFS_MOUNT_COMPAT_IOSIZE, "," MNTOPT_LARGEIO },
467 { XFS_MOUNT_BARRIER, "," MNTOPT_NOBARRIER },
468 { XFS_MOUNT_SMALL_INUMS, "," MNTOPT_64BITINODE },
469 { 0, NULL }
470 };
471 struct proc_xfs_info *xfs_infop;
472
473 for (xfs_infop = xfs_info_set; xfs_infop->flag; xfs_infop++) {
474 if (mp->m_flags & xfs_infop->flag)
475 seq_puts(m, xfs_infop->str);
476 }
477 for (xfs_infop = xfs_info_unset; xfs_infop->flag; xfs_infop++) {
478 if (!(mp->m_flags & xfs_infop->flag))
479 seq_puts(m, xfs_infop->str);
480 }
481
482 if (mp->m_flags & XFS_MOUNT_DFLT_IOSIZE)
483 seq_printf(m, "," MNTOPT_ALLOCSIZE "=%dk",
484 (int)(1 << mp->m_writeio_log) >> 10);
485
486 if (mp->m_logbufs > 0)
487 seq_printf(m, "," MNTOPT_LOGBUFS "=%d", mp->m_logbufs);
488 if (mp->m_logbsize > 0)
489 seq_printf(m, "," MNTOPT_LOGBSIZE "=%dk", mp->m_logbsize >> 10);
490
491 if (mp->m_logname)
492 seq_printf(m, "," MNTOPT_LOGDEV "=%s", mp->m_logname);
493 if (mp->m_rtname)
494 seq_printf(m, "," MNTOPT_RTDEV "=%s", mp->m_rtname);
495
496 if (mp->m_dalign > 0)
497 seq_printf(m, "," MNTOPT_SUNIT "=%d",
498 (int)XFS_FSB_TO_BB(mp, mp->m_dalign));
499 if (mp->m_swidth > 0)
500 seq_printf(m, "," MNTOPT_SWIDTH "=%d",
501 (int)XFS_FSB_TO_BB(mp, mp->m_swidth));
502
503 if (mp->m_qflags & (XFS_UQUOTA_ACCT|XFS_UQUOTA_ENFD))
504 seq_puts(m, "," MNTOPT_USRQUOTA);
505 else if (mp->m_qflags & XFS_UQUOTA_ACCT)
506 seq_puts(m, "," MNTOPT_UQUOTANOENF);
507
508 if (mp->m_qflags & (XFS_PQUOTA_ACCT|XFS_OQUOTA_ENFD))
509 seq_puts(m, "," MNTOPT_PRJQUOTA);
510 else if (mp->m_qflags & XFS_PQUOTA_ACCT)
511 seq_puts(m, "," MNTOPT_PQUOTANOENF);
512
513 if (mp->m_qflags & (XFS_GQUOTA_ACCT|XFS_OQUOTA_ENFD))
514 seq_puts(m, "," MNTOPT_GRPQUOTA);
515 else if (mp->m_qflags & XFS_GQUOTA_ACCT)
516 seq_puts(m, "," MNTOPT_GQUOTANOENF);
517
518 if (!(mp->m_qflags & XFS_ALL_QUOTA_ACCT))
519 seq_puts(m, "," MNTOPT_NOQUOTA);
520
521 return 0;
522 }
523 __uint64_t
524 xfs_max_file_offset(
525 unsigned int blockshift)
526 {
527 unsigned int pagefactor = 1;
528 unsigned int bitshift = BITS_PER_LONG - 1;
529
530 /* Figure out maximum filesize, on Linux this can depend on
531 * the filesystem blocksize (on 32 bit platforms).
532 * __block_prepare_write does this in an [unsigned] long...
533 * page->index << (PAGE_CACHE_SHIFT - bbits)
534 * So, for page sized blocks (4K on 32 bit platforms),
535 * this wraps at around 8Tb (hence MAX_LFS_FILESIZE which is
536 * (((u64)PAGE_CACHE_SIZE << (BITS_PER_LONG-1))-1)
537 * but for smaller blocksizes it is less (bbits = log2 bsize).
538 * Note1: get_block_t takes a long (implicit cast from above)
539 * Note2: The Large Block Device (LBD and HAVE_SECTOR_T) patch
540 * can optionally convert the [unsigned] long from above into
541 * an [unsigned] long long.
542 */
543
544 #if BITS_PER_LONG == 32
545 # if defined(CONFIG_LBD)
546 ASSERT(sizeof(sector_t) == 8);
547 pagefactor = PAGE_CACHE_SIZE;
548 bitshift = BITS_PER_LONG;
549 # else
550 pagefactor = PAGE_CACHE_SIZE >> (PAGE_CACHE_SHIFT - blockshift);
551 # endif
552 #endif
553
554 return (((__uint64_t)pagefactor) << bitshift) - 1;
555 }
556
557 STATIC_INLINE void
558 xfs_set_inodeops(
559 struct inode *inode)
560 {
561 switch (inode->i_mode & S_IFMT) {
562 case S_IFREG:
563 inode->i_op = &xfs_inode_operations;
564 inode->i_fop = &xfs_file_operations;
565 inode->i_mapping->a_ops = &xfs_address_space_operations;
566 break;
567 case S_IFDIR:
568 inode->i_op = &xfs_dir_inode_operations;
569 inode->i_fop = &xfs_dir_file_operations;
570 break;
571 case S_IFLNK:
572 inode->i_op = &xfs_symlink_inode_operations;
573 if (!(XFS_I(inode)->i_df.if_flags & XFS_IFINLINE))
574 inode->i_mapping->a_ops = &xfs_address_space_operations;
575 break;
576 default:
577 inode->i_op = &xfs_inode_operations;
578 init_special_inode(inode, inode->i_mode, inode->i_rdev);
579 break;
580 }
581 }
582
583 STATIC_INLINE void
584 xfs_revalidate_inode(
585 xfs_mount_t *mp,
586 bhv_vnode_t *vp,
587 xfs_inode_t *ip)
588 {
589 struct inode *inode = vn_to_inode(vp);
590
591 inode->i_mode = ip->i_d.di_mode;
592 inode->i_nlink = ip->i_d.di_nlink;
593 inode->i_uid = ip->i_d.di_uid;
594 inode->i_gid = ip->i_d.di_gid;
595
596 switch (inode->i_mode & S_IFMT) {
597 case S_IFBLK:
598 case S_IFCHR:
599 inode->i_rdev =
600 MKDEV(sysv_major(ip->i_df.if_u2.if_rdev) & 0x1ff,
601 sysv_minor(ip->i_df.if_u2.if_rdev));
602 break;
603 default:
604 inode->i_rdev = 0;
605 break;
606 }
607
608 inode->i_generation = ip->i_d.di_gen;
609 i_size_write(inode, ip->i_d.di_size);
610 inode->i_atime.tv_sec = ip->i_d.di_atime.t_sec;
611 inode->i_atime.tv_nsec = ip->i_d.di_atime.t_nsec;
612 inode->i_mtime.tv_sec = ip->i_d.di_mtime.t_sec;
613 inode->i_mtime.tv_nsec = ip->i_d.di_mtime.t_nsec;
614 inode->i_ctime.tv_sec = ip->i_d.di_ctime.t_sec;
615 inode->i_ctime.tv_nsec = ip->i_d.di_ctime.t_nsec;
616 if (ip->i_d.di_flags & XFS_DIFLAG_IMMUTABLE)
617 inode->i_flags |= S_IMMUTABLE;
618 else
619 inode->i_flags &= ~S_IMMUTABLE;
620 if (ip->i_d.di_flags & XFS_DIFLAG_APPEND)
621 inode->i_flags |= S_APPEND;
622 else
623 inode->i_flags &= ~S_APPEND;
624 if (ip->i_d.di_flags & XFS_DIFLAG_SYNC)
625 inode->i_flags |= S_SYNC;
626 else
627 inode->i_flags &= ~S_SYNC;
628 if (ip->i_d.di_flags & XFS_DIFLAG_NOATIME)
629 inode->i_flags |= S_NOATIME;
630 else
631 inode->i_flags &= ~S_NOATIME;
632 xfs_iflags_clear(ip, XFS_IMODIFIED);
633 }
634
635 void
636 xfs_initialize_vnode(
637 struct xfs_mount *mp,
638 bhv_vnode_t *vp,
639 struct xfs_inode *ip)
640 {
641 struct inode *inode = vn_to_inode(vp);
642
643 if (!ip->i_vnode) {
644 ip->i_vnode = vp;
645 inode->i_private = ip;
646 }
647
648 /*
649 * We need to set the ops vectors, and unlock the inode, but if
650 * we have been called during the new inode create process, it is
651 * too early to fill in the Linux inode. We will get called a
652 * second time once the inode is properly set up, and then we can
653 * finish our work.
654 */
655 if (ip->i_d.di_mode != 0 && (inode->i_state & I_NEW)) {
656 xfs_revalidate_inode(mp, vp, ip);
657 xfs_set_inodeops(inode);
658
659 xfs_iflags_clear(ip, XFS_INEW);
660 barrier();
661
662 unlock_new_inode(inode);
663 }
664 }
665
666 int
667 xfs_blkdev_get(
668 xfs_mount_t *mp,
669 const char *name,
670 struct block_device **bdevp)
671 {
672 int error = 0;
673
674 *bdevp = open_bdev_excl(name, 0, mp);
675 if (IS_ERR(*bdevp)) {
676 error = PTR_ERR(*bdevp);
677 printk("XFS: Invalid device [%s], error=%d\n", name, error);
678 }
679
680 return -error;
681 }
682
683 void
684 xfs_blkdev_put(
685 struct block_device *bdev)
686 {
687 if (bdev)
688 close_bdev_excl(bdev);
689 }
690
691 /*
692 * Try to write out the superblock using barriers.
693 */
694 STATIC int
695 xfs_barrier_test(
696 xfs_mount_t *mp)
697 {
698 xfs_buf_t *sbp = xfs_getsb(mp, 0);
699 int error;
700
701 XFS_BUF_UNDONE(sbp);
702 XFS_BUF_UNREAD(sbp);
703 XFS_BUF_UNDELAYWRITE(sbp);
704 XFS_BUF_WRITE(sbp);
705 XFS_BUF_UNASYNC(sbp);
706 XFS_BUF_ORDERED(sbp);
707
708 xfsbdstrat(mp, sbp);
709 error = xfs_iowait(sbp);
710
711 /*
712 * Clear all the flags we set and possible error state in the
713 * buffer. We only did the write to try out whether barriers
714 * worked and shouldn't leave any traces in the superblock
715 * buffer.
716 */
717 XFS_BUF_DONE(sbp);
718 XFS_BUF_ERROR(sbp, 0);
719 XFS_BUF_UNORDERED(sbp);
720
721 xfs_buf_relse(sbp);
722 return error;
723 }
724
725 void
726 xfs_mountfs_check_barriers(xfs_mount_t *mp)
727 {
728 int error;
729
730 if (mp->m_logdev_targp != mp->m_ddev_targp) {
731 xfs_fs_cmn_err(CE_NOTE, mp,
732 "Disabling barriers, not supported with external log device");
733 mp->m_flags &= ~XFS_MOUNT_BARRIER;
734 return;
735 }
736
737 if (mp->m_ddev_targp->bt_bdev->bd_disk->queue->ordered ==
738 QUEUE_ORDERED_NONE) {
739 xfs_fs_cmn_err(CE_NOTE, mp,
740 "Disabling barriers, not supported by the underlying device");
741 mp->m_flags &= ~XFS_MOUNT_BARRIER;
742 return;
743 }
744
745 if (xfs_readonly_buftarg(mp->m_ddev_targp)) {
746 xfs_fs_cmn_err(CE_NOTE, mp,
747 "Disabling barriers, underlying device is readonly");
748 mp->m_flags &= ~XFS_MOUNT_BARRIER;
749 return;
750 }
751
752 error = xfs_barrier_test(mp);
753 if (error) {
754 xfs_fs_cmn_err(CE_NOTE, mp,
755 "Disabling barriers, trial barrier write failed");
756 mp->m_flags &= ~XFS_MOUNT_BARRIER;
757 return;
758 }
759 }
760
761 void
762 xfs_blkdev_issue_flush(
763 xfs_buftarg_t *buftarg)
764 {
765 blkdev_issue_flush(buftarg->bt_bdev, NULL);
766 }
767
768 /*
769 * XFS AIL push thread support
770 */
771 void
772 xfsaild_wakeup(
773 xfs_mount_t *mp,
774 xfs_lsn_t threshold_lsn)
775 {
776 mp->m_ail.xa_target = threshold_lsn;
777 wake_up_process(mp->m_ail.xa_task);
778 }
779
780 int
781 xfsaild(
782 void *data)
783 {
784 xfs_mount_t *mp = (xfs_mount_t *)data;
785 xfs_lsn_t last_pushed_lsn = 0;
786 long tout = 0;
787
788 while (!kthread_should_stop()) {
789 if (tout)
790 schedule_timeout_interruptible(msecs_to_jiffies(tout));
791 tout = 1000;
792
793 /* swsusp */
794 try_to_freeze();
795
796 ASSERT(mp->m_log);
797 if (XFS_FORCED_SHUTDOWN(mp))
798 continue;
799
800 tout = xfsaild_push(mp, &last_pushed_lsn);
801 }
802
803 return 0;
804 } /* xfsaild */
805
806 int
807 xfsaild_start(
808 xfs_mount_t *mp)
809 {
810 mp->m_ail.xa_target = 0;
811 mp->m_ail.xa_task = kthread_run(xfsaild, mp, "xfsaild");
812 if (IS_ERR(mp->m_ail.xa_task))
813 return -PTR_ERR(mp->m_ail.xa_task);
814 return 0;
815 }
816
817 void
818 xfsaild_stop(
819 xfs_mount_t *mp)
820 {
821 kthread_stop(mp->m_ail.xa_task);
822 }
823
824
825
826 STATIC struct inode *
827 xfs_fs_alloc_inode(
828 struct super_block *sb)
829 {
830 bhv_vnode_t *vp;
831
832 vp = kmem_zone_alloc(xfs_vnode_zone, KM_SLEEP);
833 if (unlikely(!vp))
834 return NULL;
835 return vn_to_inode(vp);
836 }
837
838 STATIC void
839 xfs_fs_destroy_inode(
840 struct inode *inode)
841 {
842 kmem_zone_free(xfs_vnode_zone, vn_from_inode(inode));
843 }
844
845 STATIC void
846 xfs_fs_inode_init_once(
847 void *vnode)
848 {
849 inode_init_once(vn_to_inode((bhv_vnode_t *)vnode));
850 }
851
852 STATIC int __init
853 xfs_init_zones(void)
854 {
855 xfs_vnode_zone = kmem_zone_init_flags(sizeof(bhv_vnode_t), "xfs_vnode",
856 KM_ZONE_HWALIGN | KM_ZONE_RECLAIM |
857 KM_ZONE_SPREAD,
858 xfs_fs_inode_init_once);
859 if (!xfs_vnode_zone)
860 goto out;
861
862 xfs_ioend_zone = kmem_zone_init(sizeof(xfs_ioend_t), "xfs_ioend");
863 if (!xfs_ioend_zone)
864 goto out_destroy_vnode_zone;
865
866 xfs_ioend_pool = mempool_create_slab_pool(4 * MAX_BUF_PER_PAGE,
867 xfs_ioend_zone);
868 if (!xfs_ioend_pool)
869 goto out_free_ioend_zone;
870 return 0;
871
872 out_free_ioend_zone:
873 kmem_zone_destroy(xfs_ioend_zone);
874 out_destroy_vnode_zone:
875 kmem_zone_destroy(xfs_vnode_zone);
876 out:
877 return -ENOMEM;
878 }
879
880 STATIC void
881 xfs_destroy_zones(void)
882 {
883 mempool_destroy(xfs_ioend_pool);
884 kmem_zone_destroy(xfs_vnode_zone);
885 kmem_zone_destroy(xfs_ioend_zone);
886 }
887
888 /*
889 * Attempt to flush the inode, this will actually fail
890 * if the inode is pinned, but we dirty the inode again
891 * at the point when it is unpinned after a log write,
892 * since this is when the inode itself becomes flushable.
893 */
894 STATIC int
895 xfs_fs_write_inode(
896 struct inode *inode,
897 int sync)
898 {
899 int error = 0;
900 int flags = 0;
901
902 xfs_itrace_entry(XFS_I(inode));
903 if (sync) {
904 filemap_fdatawait(inode->i_mapping);
905 flags |= FLUSH_SYNC;
906 }
907 error = xfs_inode_flush(XFS_I(inode), flags);
908 /*
909 * if we failed to write out the inode then mark
910 * it dirty again so we'll try again later.
911 */
912 if (error)
913 mark_inode_dirty_sync(inode);
914
915 return -error;
916 }
917
918 STATIC void
919 xfs_fs_clear_inode(
920 struct inode *inode)
921 {
922 xfs_inode_t *ip = XFS_I(inode);
923
924 /*
925 * ip can be null when xfs_iget_core calls xfs_idestroy if we
926 * find an inode with di_mode == 0 but without IGET_CREATE set.
927 */
928 if (ip) {
929 xfs_itrace_entry(ip);
930 XFS_STATS_INC(vn_rele);
931 XFS_STATS_INC(vn_remove);
932 XFS_STATS_INC(vn_reclaim);
933 XFS_STATS_DEC(vn_active);
934
935 xfs_inactive(ip);
936 xfs_iflags_clear(ip, XFS_IMODIFIED);
937 if (xfs_reclaim(ip))
938 panic("%s: cannot reclaim 0x%p\n", __func__, inode);
939 }
940
941 ASSERT(XFS_I(inode) == NULL);
942 }
943
944 /*
945 * Enqueue a work item to be picked up by the vfs xfssyncd thread.
946 * Doing this has two advantages:
947 * - It saves on stack space, which is tight in certain situations
948 * - It can be used (with care) as a mechanism to avoid deadlocks.
949 * Flushing while allocating in a full filesystem requires both.
950 */
951 STATIC void
952 xfs_syncd_queue_work(
953 struct xfs_mount *mp,
954 void *data,
955 void (*syncer)(struct xfs_mount *, void *))
956 {
957 struct bhv_vfs_sync_work *work;
958
959 work = kmem_alloc(sizeof(struct bhv_vfs_sync_work), KM_SLEEP);
960 INIT_LIST_HEAD(&work->w_list);
961 work->w_syncer = syncer;
962 work->w_data = data;
963 work->w_mount = mp;
964 spin_lock(&mp->m_sync_lock);
965 list_add_tail(&work->w_list, &mp->m_sync_list);
966 spin_unlock(&mp->m_sync_lock);
967 wake_up_process(mp->m_sync_task);
968 }
969
970 /*
971 * Flush delayed allocate data, attempting to free up reserved space
972 * from existing allocations. At this point a new allocation attempt
973 * has failed with ENOSPC and we are in the process of scratching our
974 * heads, looking about for more room...
975 */
976 STATIC void
977 xfs_flush_inode_work(
978 struct xfs_mount *mp,
979 void *arg)
980 {
981 struct inode *inode = arg;
982 filemap_flush(inode->i_mapping);
983 iput(inode);
984 }
985
986 void
987 xfs_flush_inode(
988 xfs_inode_t *ip)
989 {
990 struct inode *inode = ip->i_vnode;
991
992 igrab(inode);
993 xfs_syncd_queue_work(ip->i_mount, inode, xfs_flush_inode_work);
994 delay(msecs_to_jiffies(500));
995 }
996
997 /*
998 * This is the "bigger hammer" version of xfs_flush_inode_work...
999 * (IOW, "If at first you don't succeed, use a Bigger Hammer").
1000 */
1001 STATIC void
1002 xfs_flush_device_work(
1003 struct xfs_mount *mp,
1004 void *arg)
1005 {
1006 struct inode *inode = arg;
1007 sync_blockdev(mp->m_super->s_bdev);
1008 iput(inode);
1009 }
1010
1011 void
1012 xfs_flush_device(
1013 xfs_inode_t *ip)
1014 {
1015 struct inode *inode = vn_to_inode(XFS_ITOV(ip));
1016
1017 igrab(inode);
1018 xfs_syncd_queue_work(ip->i_mount, inode, xfs_flush_device_work);
1019 delay(msecs_to_jiffies(500));
1020 xfs_log_force(ip->i_mount, (xfs_lsn_t)0, XFS_LOG_FORCE|XFS_LOG_SYNC);
1021 }
1022
1023 STATIC void
1024 xfs_sync_worker(
1025 struct xfs_mount *mp,
1026 void *unused)
1027 {
1028 int error;
1029
1030 if (!(mp->m_flags & XFS_MOUNT_RDONLY))
1031 error = xfs_sync(mp, SYNC_FSDATA | SYNC_BDFLUSH | SYNC_ATTR);
1032 mp->m_sync_seq++;
1033 wake_up(&mp->m_wait_single_sync_task);
1034 }
1035
1036 STATIC int
1037 xfssyncd(
1038 void *arg)
1039 {
1040 struct xfs_mount *mp = arg;
1041 long timeleft;
1042 bhv_vfs_sync_work_t *work, *n;
1043 LIST_HEAD (tmp);
1044
1045 set_freezable();
1046 timeleft = xfs_syncd_centisecs * msecs_to_jiffies(10);
1047 for (;;) {
1048 timeleft = schedule_timeout_interruptible(timeleft);
1049 /* swsusp */
1050 try_to_freeze();
1051 if (kthread_should_stop() && list_empty(&mp->m_sync_list))
1052 break;
1053
1054 spin_lock(&mp->m_sync_lock);
1055 /*
1056 * We can get woken by laptop mode, to do a sync -
1057 * that's the (only!) case where the list would be
1058 * empty with time remaining.
1059 */
1060 if (!timeleft || list_empty(&mp->m_sync_list)) {
1061 if (!timeleft)
1062 timeleft = xfs_syncd_centisecs *
1063 msecs_to_jiffies(10);
1064 INIT_LIST_HEAD(&mp->m_sync_work.w_list);
1065 list_add_tail(&mp->m_sync_work.w_list,
1066 &mp->m_sync_list);
1067 }
1068 list_for_each_entry_safe(work, n, &mp->m_sync_list, w_list)
1069 list_move(&work->w_list, &tmp);
1070 spin_unlock(&mp->m_sync_lock);
1071
1072 list_for_each_entry_safe(work, n, &tmp, w_list) {
1073 (*work->w_syncer)(mp, work->w_data);
1074 list_del(&work->w_list);
1075 if (work == &mp->m_sync_work)
1076 continue;
1077 kmem_free(work, sizeof(struct bhv_vfs_sync_work));
1078 }
1079 }
1080
1081 return 0;
1082 }
1083
1084 STATIC void
1085 xfs_fs_put_super(
1086 struct super_block *sb)
1087 {
1088 struct xfs_mount *mp = XFS_M(sb);
1089 int error;
1090
1091 kthread_stop(mp->m_sync_task);
1092
1093 xfs_sync(mp, SYNC_ATTR | SYNC_DELWRI);
1094 error = xfs_unmount(mp, 0, NULL);
1095 if (error)
1096 printk("XFS: unmount got error=%d\n", error);
1097 }
1098
1099 STATIC void
1100 xfs_fs_write_super(
1101 struct super_block *sb)
1102 {
1103 if (!(sb->s_flags & MS_RDONLY))
1104 xfs_sync(XFS_M(sb), SYNC_FSDATA);
1105 sb->s_dirt = 0;
1106 }
1107
1108 STATIC int
1109 xfs_fs_sync_super(
1110 struct super_block *sb,
1111 int wait)
1112 {
1113 struct xfs_mount *mp = XFS_M(sb);
1114 int error;
1115 int flags;
1116
1117 /*
1118 * Treat a sync operation like a freeze. This is to work
1119 * around a race in sync_inodes() which works in two phases
1120 * - an asynchronous flush, which can write out an inode
1121 * without waiting for file size updates to complete, and a
1122 * synchronous flush, which wont do anything because the
1123 * async flush removed the inode's dirty flag. Also
1124 * sync_inodes() will not see any files that just have
1125 * outstanding transactions to be flushed because we don't
1126 * dirty the Linux inode until after the transaction I/O
1127 * completes.
1128 */
1129 if (wait || unlikely(sb->s_frozen == SB_FREEZE_WRITE)) {
1130 /*
1131 * First stage of freeze - no more writers will make progress
1132 * now we are here, so we flush delwri and delalloc buffers
1133 * here, then wait for all I/O to complete. Data is frozen at
1134 * that point. Metadata is not frozen, transactions can still
1135 * occur here so don't bother flushing the buftarg (i.e
1136 * SYNC_QUIESCE) because it'll just get dirty again.
1137 */
1138 flags = SYNC_DATA_QUIESCE;
1139 } else
1140 flags = SYNC_FSDATA;
1141
1142 error = xfs_sync(mp, flags);
1143 sb->s_dirt = 0;
1144
1145 if (unlikely(laptop_mode)) {
1146 int prev_sync_seq = mp->m_sync_seq;
1147
1148 /*
1149 * The disk must be active because we're syncing.
1150 * We schedule xfssyncd now (now that the disk is
1151 * active) instead of later (when it might not be).
1152 */
1153 wake_up_process(mp->m_sync_task);
1154 /*
1155 * We have to wait for the sync iteration to complete.
1156 * If we don't, the disk activity caused by the sync
1157 * will come after the sync is completed, and that
1158 * triggers another sync from laptop mode.
1159 */
1160 wait_event(mp->m_wait_single_sync_task,
1161 mp->m_sync_seq != prev_sync_seq);
1162 }
1163
1164 return -error;
1165 }
1166
1167 STATIC int
1168 xfs_fs_statfs(
1169 struct dentry *dentry,
1170 struct kstatfs *statp)
1171 {
1172 struct xfs_mount *mp = XFS_M(dentry->d_sb);
1173 xfs_sb_t *sbp = &mp->m_sb;
1174 __uint64_t fakeinos, id;
1175 xfs_extlen_t lsize;
1176
1177 statp->f_type = XFS_SB_MAGIC;
1178 statp->f_namelen = MAXNAMELEN - 1;
1179
1180 id = huge_encode_dev(mp->m_ddev_targp->bt_dev);
1181 statp->f_fsid.val[0] = (u32)id;
1182 statp->f_fsid.val[1] = (u32)(id >> 32);
1183
1184 xfs_icsb_sync_counters(mp, XFS_ICSB_LAZY_COUNT);
1185
1186 spin_lock(&mp->m_sb_lock);
1187 statp->f_bsize = sbp->sb_blocksize;
1188 lsize = sbp->sb_logstart ? sbp->sb_logblocks : 0;
1189 statp->f_blocks = sbp->sb_dblocks - lsize;
1190 statp->f_bfree = statp->f_bavail =
1191 sbp->sb_fdblocks - XFS_ALLOC_SET_ASIDE(mp);
1192 fakeinos = statp->f_bfree << sbp->sb_inopblog;
1193 #if XFS_BIG_INUMS
1194 fakeinos += mp->m_inoadd;
1195 #endif
1196 statp->f_files =
1197 MIN(sbp->sb_icount + fakeinos, (__uint64_t)XFS_MAXINUMBER);
1198 if (mp->m_maxicount)
1199 #if XFS_BIG_INUMS
1200 if (!mp->m_inoadd)
1201 #endif
1202 statp->f_files = min_t(typeof(statp->f_files),
1203 statp->f_files,
1204 mp->m_maxicount);
1205 statp->f_ffree = statp->f_files - (sbp->sb_icount - sbp->sb_ifree);
1206 spin_unlock(&mp->m_sb_lock);
1207
1208 XFS_QM_DQSTATVFS(XFS_I(dentry->d_inode), statp);
1209 return 0;
1210 }
1211
1212 STATIC int
1213 xfs_fs_remount(
1214 struct super_block *sb,
1215 int *flags,
1216 char *options)
1217 {
1218 struct xfs_mount *mp = XFS_M(sb);
1219 struct xfs_mount_args *args = xfs_args_allocate(sb, 0);
1220 int error;
1221
1222 error = xfs_parseargs(mp, options, args, 1);
1223 if (!error)
1224 error = xfs_mntupdate(mp, flags, args);
1225 kmem_free(args, sizeof(*args));
1226 return -error;
1227 }
1228
1229 /*
1230 * Second stage of a freeze. The data is already frozen so we only
1231 * need to take care of themetadata. Once that's done write a dummy
1232 * record to dirty the log in case of a crash while frozen.
1233 */
1234 STATIC void
1235 xfs_fs_lockfs(
1236 struct super_block *sb)
1237 {
1238 struct xfs_mount *mp = XFS_M(sb);
1239
1240 xfs_attr_quiesce(mp);
1241 xfs_fs_log_dummy(mp);
1242 }
1243
1244 STATIC int
1245 xfs_fs_show_options(
1246 struct seq_file *m,
1247 struct vfsmount *mnt)
1248 {
1249 return -xfs_showargs(XFS_M(mnt->mnt_sb), m);
1250 }
1251
1252 STATIC int
1253 xfs_fs_quotasync(
1254 struct super_block *sb,
1255 int type)
1256 {
1257 return -XFS_QM_QUOTACTL(XFS_M(sb), Q_XQUOTASYNC, 0, NULL);
1258 }
1259
1260 STATIC int
1261 xfs_fs_getxstate(
1262 struct super_block *sb,
1263 struct fs_quota_stat *fqs)
1264 {
1265 return -XFS_QM_QUOTACTL(XFS_M(sb), Q_XGETQSTAT, 0, (caddr_t)fqs);
1266 }
1267
1268 STATIC int
1269 xfs_fs_setxstate(
1270 struct super_block *sb,
1271 unsigned int flags,
1272 int op)
1273 {
1274 return -XFS_QM_QUOTACTL(XFS_M(sb), op, 0, (caddr_t)&flags);
1275 }
1276
1277 STATIC int
1278 xfs_fs_getxquota(
1279 struct super_block *sb,
1280 int type,
1281 qid_t id,
1282 struct fs_disk_quota *fdq)
1283 {
1284 return -XFS_QM_QUOTACTL(XFS_M(sb),
1285 (type == USRQUOTA) ? Q_XGETQUOTA :
1286 ((type == GRPQUOTA) ? Q_XGETGQUOTA :
1287 Q_XGETPQUOTA), id, (caddr_t)fdq);
1288 }
1289
1290 STATIC int
1291 xfs_fs_setxquota(
1292 struct super_block *sb,
1293 int type,
1294 qid_t id,
1295 struct fs_disk_quota *fdq)
1296 {
1297 return -XFS_QM_QUOTACTL(XFS_M(sb),
1298 (type == USRQUOTA) ? Q_XSETQLIM :
1299 ((type == GRPQUOTA) ? Q_XSETGQLIM :
1300 Q_XSETPQLIM), id, (caddr_t)fdq);
1301 }
1302
1303 STATIC int
1304 xfs_fs_fill_super(
1305 struct super_block *sb,
1306 void *data,
1307 int silent)
1308 {
1309 struct inode *root;
1310 struct xfs_mount *mp = NULL;
1311 struct xfs_mount_args *args = xfs_args_allocate(sb, silent);
1312 int error;
1313
1314 mp = xfs_mount_init();
1315
1316 INIT_LIST_HEAD(&mp->m_sync_list);
1317 spin_lock_init(&mp->m_sync_lock);
1318 init_waitqueue_head(&mp->m_wait_single_sync_task);
1319
1320 mp->m_super = sb;
1321 sb->s_fs_info = mp;
1322
1323 if (sb->s_flags & MS_RDONLY)
1324 mp->m_flags |= XFS_MOUNT_RDONLY;
1325
1326 error = xfs_parseargs(mp, (char *)data, args, 0);
1327 if (error)
1328 goto fail_vfsop;
1329
1330 sb_min_blocksize(sb, BBSIZE);
1331 sb->s_export_op = &xfs_export_operations;
1332 sb->s_qcop = &xfs_quotactl_operations;
1333 sb->s_op = &xfs_super_operations;
1334
1335 error = xfs_mount(mp, args, NULL);
1336 if (error)
1337 goto fail_vfsop;
1338
1339 sb->s_dirt = 1;
1340 sb->s_magic = XFS_SB_MAGIC;
1341 sb->s_blocksize = mp->m_sb.sb_blocksize;
1342 sb->s_blocksize_bits = ffs(sb->s_blocksize) - 1;
1343 sb->s_maxbytes = xfs_max_file_offset(sb->s_blocksize_bits);
1344 sb->s_time_gran = 1;
1345 set_posix_acl_flag(sb);
1346
1347 root = igrab(mp->m_rootip->i_vnode);
1348 if (!root) {
1349 error = ENOENT;
1350 goto fail_unmount;
1351 }
1352 if (is_bad_inode(root)) {
1353 error = EINVAL;
1354 goto fail_vnrele;
1355 }
1356 sb->s_root = d_alloc_root(root);
1357 if (!sb->s_root) {
1358 error = ENOMEM;
1359 goto fail_vnrele;
1360 }
1361
1362 mp->m_sync_work.w_syncer = xfs_sync_worker;
1363 mp->m_sync_work.w_mount = mp;
1364 mp->m_sync_task = kthread_run(xfssyncd, mp, "xfssyncd");
1365 if (IS_ERR(mp->m_sync_task)) {
1366 error = -PTR_ERR(mp->m_sync_task);
1367 goto fail_vnrele;
1368 }
1369
1370 xfs_itrace_exit(XFS_I(sb->s_root->d_inode));
1371
1372 kmem_free(args, sizeof(*args));
1373 return 0;
1374
1375 fail_vnrele:
1376 if (sb->s_root) {
1377 dput(sb->s_root);
1378 sb->s_root = NULL;
1379 } else {
1380 iput(root);
1381 }
1382
1383 fail_unmount:
1384 xfs_unmount(mp, 0, NULL);
1385
1386 fail_vfsop:
1387 kmem_free(args, sizeof(*args));
1388 return -error;
1389 }
1390
1391 STATIC int
1392 xfs_fs_get_sb(
1393 struct file_system_type *fs_type,
1394 int flags,
1395 const char *dev_name,
1396 void *data,
1397 struct vfsmount *mnt)
1398 {
1399 return get_sb_bdev(fs_type, flags, dev_name, data, xfs_fs_fill_super,
1400 mnt);
1401 }
1402
1403 static struct super_operations xfs_super_operations = {
1404 .alloc_inode = xfs_fs_alloc_inode,
1405 .destroy_inode = xfs_fs_destroy_inode,
1406 .write_inode = xfs_fs_write_inode,
1407 .clear_inode = xfs_fs_clear_inode,
1408 .put_super = xfs_fs_put_super,
1409 .write_super = xfs_fs_write_super,
1410 .sync_fs = xfs_fs_sync_super,
1411 .write_super_lockfs = xfs_fs_lockfs,
1412 .statfs = xfs_fs_statfs,
1413 .remount_fs = xfs_fs_remount,
1414 .show_options = xfs_fs_show_options,
1415 };
1416
1417 static struct quotactl_ops xfs_quotactl_operations = {
1418 .quota_sync = xfs_fs_quotasync,
1419 .get_xstate = xfs_fs_getxstate,
1420 .set_xstate = xfs_fs_setxstate,
1421 .get_xquota = xfs_fs_getxquota,
1422 .set_xquota = xfs_fs_setxquota,
1423 };
1424
1425 static struct file_system_type xfs_fs_type = {
1426 .owner = THIS_MODULE,
1427 .name = "xfs",
1428 .get_sb = xfs_fs_get_sb,
1429 .kill_sb = kill_block_super,
1430 .fs_flags = FS_REQUIRES_DEV,
1431 };
1432
1433
1434 STATIC int __init
1435 init_xfs_fs( void )
1436 {
1437 int error;
1438 static char message[] __initdata = KERN_INFO \
1439 XFS_VERSION_STRING " with " XFS_BUILD_OPTIONS " enabled\n";
1440
1441 printk(message);
1442
1443 ktrace_init(64);
1444
1445 error = xfs_init_zones();
1446 if (error < 0)
1447 goto undo_zones;
1448
1449 error = xfs_buf_init();
1450 if (error < 0)
1451 goto undo_buffers;
1452
1453 vn_init();
1454 xfs_init();
1455 uuid_init();
1456 vfs_initquota();
1457
1458 error = register_filesystem(&xfs_fs_type);
1459 if (error)
1460 goto undo_register;
1461 return 0;
1462
1463 undo_register:
1464 xfs_buf_terminate();
1465
1466 undo_buffers:
1467 xfs_destroy_zones();
1468
1469 undo_zones:
1470 return error;
1471 }
1472
1473 STATIC void __exit
1474 exit_xfs_fs( void )
1475 {
1476 vfs_exitquota();
1477 unregister_filesystem(&xfs_fs_type);
1478 xfs_cleanup();
1479 xfs_buf_terminate();
1480 xfs_destroy_zones();
1481 ktrace_uninit();
1482 }
1483
1484 module_init(init_xfs_fs);
1485 module_exit(exit_xfs_fs);
1486
1487 MODULE_AUTHOR("Silicon Graphics, Inc.");
1488 MODULE_DESCRIPTION(XFS_VERSION_STRING " with " XFS_BUILD_OPTIONS " enabled");
1489 MODULE_LICENSE("GPL");
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