2 * Copyright (c) 2000-2006 Silicon Graphics, Inc.
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.
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.
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
22 #include "xfs_trans.h"
26 #include "xfs_alloc.h"
27 #include "xfs_quota.h"
28 #include "xfs_mount.h"
29 #include "xfs_bmap_btree.h"
30 #include "xfs_alloc_btree.h"
31 #include "xfs_ialloc_btree.h"
32 #include "xfs_dinode.h"
33 #include "xfs_inode.h"
34 #include "xfs_btree.h"
35 #include "xfs_ialloc.h"
37 #include "xfs_rtalloc.h"
38 #include "xfs_error.h"
39 #include "xfs_itable.h"
40 #include "xfs_fsops.h"
42 #include "xfs_buf_item.h"
43 #include "xfs_utils.h"
44 #include "xfs_vnodeops.h"
45 #include "xfs_log_priv.h"
46 #include "xfs_trans_priv.h"
47 #include "xfs_filestream.h"
48 #include "xfs_da_btree.h"
49 #include "xfs_extfree_item.h"
50 #include "xfs_mru_cache.h"
51 #include "xfs_inode_item.h"
52 #include "xfs_icache.h"
53 #include "xfs_trace.h"
55 #include <linux/namei.h>
56 #include <linux/init.h>
57 #include <linux/slab.h>
58 #include <linux/mount.h>
59 #include <linux/mempool.h>
60 #include <linux/writeback.h>
61 #include <linux/kthread.h>
62 #include <linux/freezer.h>
63 #include <linux/parser.h>
65 static const struct super_operations xfs_super_operations
;
66 static kmem_zone_t
*xfs_ioend_zone
;
67 mempool_t
*xfs_ioend_pool
;
69 #define MNTOPT_LOGBUFS "logbufs" /* number of XFS log buffers */
70 #define MNTOPT_LOGBSIZE "logbsize" /* size of XFS log buffers */
71 #define MNTOPT_LOGDEV "logdev" /* log device */
72 #define MNTOPT_RTDEV "rtdev" /* realtime I/O device */
73 #define MNTOPT_BIOSIZE "biosize" /* log2 of preferred buffered io size */
74 #define MNTOPT_WSYNC "wsync" /* safe-mode nfs compatible mount */
75 #define MNTOPT_NOALIGN "noalign" /* turn off stripe alignment */
76 #define MNTOPT_SWALLOC "swalloc" /* turn on stripe width allocation */
77 #define MNTOPT_SUNIT "sunit" /* data volume stripe unit */
78 #define MNTOPT_SWIDTH "swidth" /* data volume stripe width */
79 #define MNTOPT_NOUUID "nouuid" /* ignore filesystem UUID */
80 #define MNTOPT_MTPT "mtpt" /* filesystem mount point */
81 #define MNTOPT_GRPID "grpid" /* group-ID from parent directory */
82 #define MNTOPT_NOGRPID "nogrpid" /* group-ID from current process */
83 #define MNTOPT_BSDGROUPS "bsdgroups" /* group-ID from parent directory */
84 #define MNTOPT_SYSVGROUPS "sysvgroups" /* group-ID from current process */
85 #define MNTOPT_ALLOCSIZE "allocsize" /* preferred allocation size */
86 #define MNTOPT_NORECOVERY "norecovery" /* don't run XFS recovery */
87 #define MNTOPT_BARRIER "barrier" /* use writer barriers for log write and
88 * unwritten extent conversion */
89 #define MNTOPT_NOBARRIER "nobarrier" /* .. disable */
90 #define MNTOPT_64BITINODE "inode64" /* inodes can be allocated anywhere */
91 #define MNTOPT_32BITINODE "inode32" /* inode allocation limited to
92 * XFS_MAXINUMBER_32 */
93 #define MNTOPT_IKEEP "ikeep" /* do not free empty inode clusters */
94 #define MNTOPT_NOIKEEP "noikeep" /* free empty inode clusters */
95 #define MNTOPT_LARGEIO "largeio" /* report large I/O sizes in stat() */
96 #define MNTOPT_NOLARGEIO "nolargeio" /* do not report large I/O sizes
98 #define MNTOPT_ATTR2 "attr2" /* do use attr2 attribute format */
99 #define MNTOPT_NOATTR2 "noattr2" /* do not use attr2 attribute format */
100 #define MNTOPT_FILESTREAM "filestreams" /* use filestreams allocator */
101 #define MNTOPT_QUOTA "quota" /* disk quotas (user) */
102 #define MNTOPT_NOQUOTA "noquota" /* no quotas */
103 #define MNTOPT_USRQUOTA "usrquota" /* user quota enabled */
104 #define MNTOPT_GRPQUOTA "grpquota" /* group quota enabled */
105 #define MNTOPT_PRJQUOTA "prjquota" /* project quota enabled */
106 #define MNTOPT_UQUOTA "uquota" /* user quota (IRIX variant) */
107 #define MNTOPT_GQUOTA "gquota" /* group quota (IRIX variant) */
108 #define MNTOPT_PQUOTA "pquota" /* project quota (IRIX variant) */
109 #define MNTOPT_UQUOTANOENF "uqnoenforce"/* user quota limit enforcement */
110 #define MNTOPT_GQUOTANOENF "gqnoenforce"/* group quota limit enforcement */
111 #define MNTOPT_PQUOTANOENF "pqnoenforce"/* project quota limit enforcement */
112 #define MNTOPT_QUOTANOENF "qnoenforce" /* same as uqnoenforce */
113 #define MNTOPT_DELAYLOG "delaylog" /* Delayed logging enabled */
114 #define MNTOPT_NODELAYLOG "nodelaylog" /* Delayed logging disabled */
115 #define MNTOPT_DISCARD "discard" /* Discard unused blocks */
116 #define MNTOPT_NODISCARD "nodiscard" /* Do not discard unused blocks */
119 * Table driven mount option parser.
121 * Currently only used for remount, but it will be used for mount
122 * in the future, too.
132 static const match_table_t tokens
= {
133 {Opt_barrier
, "barrier"},
134 {Opt_nobarrier
, "nobarrier"},
135 {Opt_inode64
, "inode64"},
136 {Opt_inode32
, "inode32"},
142 suffix_strtoul(char *s
, char **endp
, unsigned int base
)
144 int last
, shift_left_factor
= 0;
147 last
= strlen(value
) - 1;
148 if (value
[last
] == 'K' || value
[last
] == 'k') {
149 shift_left_factor
= 10;
152 if (value
[last
] == 'M' || value
[last
] == 'm') {
153 shift_left_factor
= 20;
156 if (value
[last
] == 'G' || value
[last
] == 'g') {
157 shift_left_factor
= 30;
161 return simple_strtoul((const char *)s
, endp
, base
) << shift_left_factor
;
165 * This function fills in xfs_mount_t fields based on mount args.
166 * Note: the superblock has _not_ yet been read in.
168 * Note that this function leaks the various device name allocations on
169 * failure. The caller takes care of them.
173 struct xfs_mount
*mp
,
176 struct super_block
*sb
= mp
->m_super
;
177 char *this_char
, *value
, *eov
;
181 __uint8_t iosizelog
= 0;
184 * set up the mount name first so all the errors will refer to the
187 mp
->m_fsname
= kstrndup(sb
->s_id
, MAXNAMELEN
, GFP_KERNEL
);
190 mp
->m_fsname_len
= strlen(mp
->m_fsname
) + 1;
193 * Copy binary VFS mount flags we are interested in.
195 if (sb
->s_flags
& MS_RDONLY
)
196 mp
->m_flags
|= XFS_MOUNT_RDONLY
;
197 if (sb
->s_flags
& MS_DIRSYNC
)
198 mp
->m_flags
|= XFS_MOUNT_DIRSYNC
;
199 if (sb
->s_flags
& MS_SYNCHRONOUS
)
200 mp
->m_flags
|= XFS_MOUNT_WSYNC
;
203 * Set some default flags that could be cleared by the mount option
206 mp
->m_flags
|= XFS_MOUNT_BARRIER
;
207 mp
->m_flags
|= XFS_MOUNT_COMPAT_IOSIZE
;
209 mp
->m_flags
|= XFS_MOUNT_SMALL_INUMS
;
213 * These can be overridden by the mount option parsing.
221 while ((this_char
= strsep(&options
, ",")) != NULL
) {
224 if ((value
= strchr(this_char
, '=')) != NULL
)
227 if (!strcmp(this_char
, MNTOPT_LOGBUFS
)) {
228 if (!value
|| !*value
) {
229 xfs_warn(mp
, "%s option requires an argument",
233 mp
->m_logbufs
= simple_strtoul(value
, &eov
, 10);
234 } else if (!strcmp(this_char
, MNTOPT_LOGBSIZE
)) {
235 if (!value
|| !*value
) {
236 xfs_warn(mp
, "%s option requires an argument",
240 mp
->m_logbsize
= suffix_strtoul(value
, &eov
, 10);
241 } else if (!strcmp(this_char
, MNTOPT_LOGDEV
)) {
242 if (!value
|| !*value
) {
243 xfs_warn(mp
, "%s option requires an argument",
247 mp
->m_logname
= kstrndup(value
, MAXNAMELEN
, GFP_KERNEL
);
250 } else if (!strcmp(this_char
, MNTOPT_MTPT
)) {
251 xfs_warn(mp
, "%s option not allowed on this system",
254 } else if (!strcmp(this_char
, MNTOPT_RTDEV
)) {
255 if (!value
|| !*value
) {
256 xfs_warn(mp
, "%s option requires an argument",
260 mp
->m_rtname
= kstrndup(value
, MAXNAMELEN
, GFP_KERNEL
);
263 } else if (!strcmp(this_char
, MNTOPT_BIOSIZE
)) {
264 if (!value
|| !*value
) {
265 xfs_warn(mp
, "%s option requires an argument",
269 iosize
= simple_strtoul(value
, &eov
, 10);
270 iosizelog
= ffs(iosize
) - 1;
271 } else if (!strcmp(this_char
, MNTOPT_ALLOCSIZE
)) {
272 if (!value
|| !*value
) {
273 xfs_warn(mp
, "%s option requires an argument",
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_NORECOVERY
)) {
288 mp
->m_flags
|= XFS_MOUNT_NORECOVERY
;
289 } else if (!strcmp(this_char
, MNTOPT_NOALIGN
)) {
290 mp
->m_flags
|= XFS_MOUNT_NOALIGN
;
291 } else if (!strcmp(this_char
, MNTOPT_SWALLOC
)) {
292 mp
->m_flags
|= XFS_MOUNT_SWALLOC
;
293 } else if (!strcmp(this_char
, MNTOPT_SUNIT
)) {
294 if (!value
|| !*value
) {
295 xfs_warn(mp
, "%s option requires an argument",
299 dsunit
= simple_strtoul(value
, &eov
, 10);
300 } else if (!strcmp(this_char
, MNTOPT_SWIDTH
)) {
301 if (!value
|| !*value
) {
302 xfs_warn(mp
, "%s option requires an argument",
306 dswidth
= simple_strtoul(value
, &eov
, 10);
307 } else if (!strcmp(this_char
, MNTOPT_32BITINODE
)) {
308 mp
->m_flags
|= XFS_MOUNT_SMALL_INUMS
;
309 } else if (!strcmp(this_char
, MNTOPT_64BITINODE
)) {
310 mp
->m_flags
&= ~XFS_MOUNT_SMALL_INUMS
;
312 xfs_warn(mp
, "%s option not allowed on this system",
316 } else if (!strcmp(this_char
, MNTOPT_NOUUID
)) {
317 mp
->m_flags
|= XFS_MOUNT_NOUUID
;
318 } else if (!strcmp(this_char
, MNTOPT_BARRIER
)) {
319 mp
->m_flags
|= XFS_MOUNT_BARRIER
;
320 } else if (!strcmp(this_char
, MNTOPT_NOBARRIER
)) {
321 mp
->m_flags
&= ~XFS_MOUNT_BARRIER
;
322 } else if (!strcmp(this_char
, MNTOPT_IKEEP
)) {
323 mp
->m_flags
|= XFS_MOUNT_IKEEP
;
324 } else if (!strcmp(this_char
, MNTOPT_NOIKEEP
)) {
325 mp
->m_flags
&= ~XFS_MOUNT_IKEEP
;
326 } else if (!strcmp(this_char
, MNTOPT_LARGEIO
)) {
327 mp
->m_flags
&= ~XFS_MOUNT_COMPAT_IOSIZE
;
328 } else if (!strcmp(this_char
, MNTOPT_NOLARGEIO
)) {
329 mp
->m_flags
|= XFS_MOUNT_COMPAT_IOSIZE
;
330 } else if (!strcmp(this_char
, MNTOPT_ATTR2
)) {
331 mp
->m_flags
|= XFS_MOUNT_ATTR2
;
332 } else if (!strcmp(this_char
, MNTOPT_NOATTR2
)) {
333 mp
->m_flags
&= ~XFS_MOUNT_ATTR2
;
334 mp
->m_flags
|= XFS_MOUNT_NOATTR2
;
335 } else if (!strcmp(this_char
, MNTOPT_FILESTREAM
)) {
336 mp
->m_flags
|= XFS_MOUNT_FILESTREAMS
;
337 } else if (!strcmp(this_char
, MNTOPT_NOQUOTA
)) {
338 mp
->m_qflags
&= ~XFS_ALL_QUOTA_ACCT
;
339 mp
->m_qflags
&= ~XFS_ALL_QUOTA_ENFD
;
340 mp
->m_qflags
&= ~XFS_ALL_QUOTA_ACTIVE
;
341 } else if (!strcmp(this_char
, MNTOPT_QUOTA
) ||
342 !strcmp(this_char
, MNTOPT_UQUOTA
) ||
343 !strcmp(this_char
, MNTOPT_USRQUOTA
)) {
344 mp
->m_qflags
|= (XFS_UQUOTA_ACCT
| XFS_UQUOTA_ACTIVE
|
346 } else if (!strcmp(this_char
, MNTOPT_QUOTANOENF
) ||
347 !strcmp(this_char
, MNTOPT_UQUOTANOENF
)) {
348 mp
->m_qflags
|= (XFS_UQUOTA_ACCT
| XFS_UQUOTA_ACTIVE
);
349 mp
->m_qflags
&= ~XFS_UQUOTA_ENFD
;
350 } else if (!strcmp(this_char
, MNTOPT_PQUOTA
) ||
351 !strcmp(this_char
, MNTOPT_PRJQUOTA
)) {
352 mp
->m_qflags
|= (XFS_PQUOTA_ACCT
| XFS_PQUOTA_ACTIVE
|
354 } else if (!strcmp(this_char
, MNTOPT_PQUOTANOENF
)) {
355 mp
->m_qflags
|= (XFS_PQUOTA_ACCT
| XFS_PQUOTA_ACTIVE
);
356 mp
->m_qflags
&= ~XFS_OQUOTA_ENFD
;
357 } else if (!strcmp(this_char
, MNTOPT_GQUOTA
) ||
358 !strcmp(this_char
, MNTOPT_GRPQUOTA
)) {
359 mp
->m_qflags
|= (XFS_GQUOTA_ACCT
| XFS_GQUOTA_ACTIVE
|
361 } else if (!strcmp(this_char
, MNTOPT_GQUOTANOENF
)) {
362 mp
->m_qflags
|= (XFS_GQUOTA_ACCT
| XFS_GQUOTA_ACTIVE
);
363 mp
->m_qflags
&= ~XFS_OQUOTA_ENFD
;
364 } else if (!strcmp(this_char
, MNTOPT_DELAYLOG
)) {
366 "delaylog is the default now, option is deprecated.");
367 } else if (!strcmp(this_char
, MNTOPT_NODELAYLOG
)) {
369 "nodelaylog support has been removed, option is deprecated.");
370 } else if (!strcmp(this_char
, MNTOPT_DISCARD
)) {
371 mp
->m_flags
|= XFS_MOUNT_DISCARD
;
372 } else if (!strcmp(this_char
, MNTOPT_NODISCARD
)) {
373 mp
->m_flags
&= ~XFS_MOUNT_DISCARD
;
374 } else if (!strcmp(this_char
, "ihashsize")) {
376 "ihashsize no longer used, option is deprecated.");
377 } else if (!strcmp(this_char
, "osyncisdsync")) {
379 "osyncisdsync has no effect, option is deprecated.");
380 } else if (!strcmp(this_char
, "osyncisosync")) {
382 "osyncisosync has no effect, option is deprecated.");
383 } else if (!strcmp(this_char
, "irixsgid")) {
385 "irixsgid is now a sysctl(2) variable, option is deprecated.");
387 xfs_warn(mp
, "unknown mount option [%s].", this_char
);
393 * no recovery flag requires a read-only mount
395 if ((mp
->m_flags
& XFS_MOUNT_NORECOVERY
) &&
396 !(mp
->m_flags
& XFS_MOUNT_RDONLY
)) {
397 xfs_warn(mp
, "no-recovery mounts must be read-only.");
401 if ((mp
->m_flags
& XFS_MOUNT_NOALIGN
) && (dsunit
|| dswidth
)) {
403 "sunit and swidth options incompatible with the noalign option");
407 #ifndef CONFIG_XFS_QUOTA
408 if (XFS_IS_QUOTA_RUNNING(mp
)) {
409 xfs_warn(mp
, "quota support not available in this kernel.");
414 if ((mp
->m_qflags
& (XFS_GQUOTA_ACCT
| XFS_GQUOTA_ACTIVE
)) &&
415 (mp
->m_qflags
& (XFS_PQUOTA_ACCT
| XFS_PQUOTA_ACTIVE
))) {
416 xfs_warn(mp
, "cannot mount with both project and group quota");
420 if ((dsunit
&& !dswidth
) || (!dsunit
&& dswidth
)) {
421 xfs_warn(mp
, "sunit and swidth must be specified together");
425 if (dsunit
&& (dswidth
% dsunit
!= 0)) {
427 "stripe width (%d) must be a multiple of the stripe unit (%d)",
433 if (!(mp
->m_flags
& XFS_MOUNT_NOALIGN
)) {
435 * At this point the superblock has not been read
436 * in, therefore we do not know the block size.
437 * Before the mount call ends we will convert
441 mp
->m_dalign
= dsunit
;
442 mp
->m_flags
|= XFS_MOUNT_RETERR
;
446 mp
->m_swidth
= dswidth
;
449 if (mp
->m_logbufs
!= -1 &&
450 mp
->m_logbufs
!= 0 &&
451 (mp
->m_logbufs
< XLOG_MIN_ICLOGS
||
452 mp
->m_logbufs
> XLOG_MAX_ICLOGS
)) {
453 xfs_warn(mp
, "invalid logbufs value: %d [not %d-%d]",
454 mp
->m_logbufs
, XLOG_MIN_ICLOGS
, XLOG_MAX_ICLOGS
);
455 return XFS_ERROR(EINVAL
);
457 if (mp
->m_logbsize
!= -1 &&
458 mp
->m_logbsize
!= 0 &&
459 (mp
->m_logbsize
< XLOG_MIN_RECORD_BSIZE
||
460 mp
->m_logbsize
> XLOG_MAX_RECORD_BSIZE
||
461 !is_power_of_2(mp
->m_logbsize
))) {
463 "invalid logbufsize: %d [not 16k,32k,64k,128k or 256k]",
465 return XFS_ERROR(EINVAL
);
469 if (iosizelog
> XFS_MAX_IO_LOG
||
470 iosizelog
< XFS_MIN_IO_LOG
) {
471 xfs_warn(mp
, "invalid log iosize: %d [not %d-%d]",
472 iosizelog
, XFS_MIN_IO_LOG
,
474 return XFS_ERROR(EINVAL
);
477 mp
->m_flags
|= XFS_MOUNT_DFLT_IOSIZE
;
478 mp
->m_readio_log
= iosizelog
;
479 mp
->m_writeio_log
= iosizelog
;
485 struct proc_xfs_info
{
492 struct xfs_mount
*mp
,
495 static struct proc_xfs_info xfs_info_set
[] = {
496 /* the few simple ones we can get from the mount struct */
497 { XFS_MOUNT_IKEEP
, "," MNTOPT_IKEEP
},
498 { XFS_MOUNT_WSYNC
, "," MNTOPT_WSYNC
},
499 { XFS_MOUNT_NOALIGN
, "," MNTOPT_NOALIGN
},
500 { XFS_MOUNT_SWALLOC
, "," MNTOPT_SWALLOC
},
501 { XFS_MOUNT_NOUUID
, "," MNTOPT_NOUUID
},
502 { XFS_MOUNT_NORECOVERY
, "," MNTOPT_NORECOVERY
},
503 { XFS_MOUNT_ATTR2
, "," MNTOPT_ATTR2
},
504 { XFS_MOUNT_FILESTREAMS
, "," MNTOPT_FILESTREAM
},
505 { XFS_MOUNT_GRPID
, "," MNTOPT_GRPID
},
506 { XFS_MOUNT_DISCARD
, "," MNTOPT_DISCARD
},
507 { XFS_MOUNT_SMALL_INUMS
, "," MNTOPT_32BITINODE
},
510 static struct proc_xfs_info xfs_info_unset
[] = {
511 /* the few simple ones we can get from the mount struct */
512 { XFS_MOUNT_COMPAT_IOSIZE
, "," MNTOPT_LARGEIO
},
513 { XFS_MOUNT_BARRIER
, "," MNTOPT_NOBARRIER
},
514 { XFS_MOUNT_SMALL_INUMS
, "," MNTOPT_64BITINODE
},
517 struct proc_xfs_info
*xfs_infop
;
519 for (xfs_infop
= xfs_info_set
; xfs_infop
->flag
; xfs_infop
++) {
520 if (mp
->m_flags
& xfs_infop
->flag
)
521 seq_puts(m
, xfs_infop
->str
);
523 for (xfs_infop
= xfs_info_unset
; xfs_infop
->flag
; xfs_infop
++) {
524 if (!(mp
->m_flags
& xfs_infop
->flag
))
525 seq_puts(m
, xfs_infop
->str
);
528 if (mp
->m_flags
& XFS_MOUNT_DFLT_IOSIZE
)
529 seq_printf(m
, "," MNTOPT_ALLOCSIZE
"=%dk",
530 (int)(1 << mp
->m_writeio_log
) >> 10);
532 if (mp
->m_logbufs
> 0)
533 seq_printf(m
, "," MNTOPT_LOGBUFS
"=%d", mp
->m_logbufs
);
534 if (mp
->m_logbsize
> 0)
535 seq_printf(m
, "," MNTOPT_LOGBSIZE
"=%dk", mp
->m_logbsize
>> 10);
538 seq_printf(m
, "," MNTOPT_LOGDEV
"=%s", mp
->m_logname
);
540 seq_printf(m
, "," MNTOPT_RTDEV
"=%s", mp
->m_rtname
);
542 if (mp
->m_dalign
> 0)
543 seq_printf(m
, "," MNTOPT_SUNIT
"=%d",
544 (int)XFS_FSB_TO_BB(mp
, mp
->m_dalign
));
545 if (mp
->m_swidth
> 0)
546 seq_printf(m
, "," MNTOPT_SWIDTH
"=%d",
547 (int)XFS_FSB_TO_BB(mp
, mp
->m_swidth
));
549 if (mp
->m_qflags
& (XFS_UQUOTA_ACCT
|XFS_UQUOTA_ENFD
))
550 seq_puts(m
, "," MNTOPT_USRQUOTA
);
551 else if (mp
->m_qflags
& XFS_UQUOTA_ACCT
)
552 seq_puts(m
, "," MNTOPT_UQUOTANOENF
);
554 /* Either project or group quotas can be active, not both */
556 if (mp
->m_qflags
& XFS_PQUOTA_ACCT
) {
557 if (mp
->m_qflags
& XFS_OQUOTA_ENFD
)
558 seq_puts(m
, "," MNTOPT_PRJQUOTA
);
560 seq_puts(m
, "," MNTOPT_PQUOTANOENF
);
561 } else if (mp
->m_qflags
& XFS_GQUOTA_ACCT
) {
562 if (mp
->m_qflags
& XFS_OQUOTA_ENFD
)
563 seq_puts(m
, "," MNTOPT_GRPQUOTA
);
565 seq_puts(m
, "," MNTOPT_GQUOTANOENF
);
568 if (!(mp
->m_qflags
& XFS_ALL_QUOTA_ACCT
))
569 seq_puts(m
, "," MNTOPT_NOQUOTA
);
575 unsigned int blockshift
)
577 unsigned int pagefactor
= 1;
578 unsigned int bitshift
= BITS_PER_LONG
- 1;
580 /* Figure out maximum filesize, on Linux this can depend on
581 * the filesystem blocksize (on 32 bit platforms).
582 * __block_write_begin does this in an [unsigned] long...
583 * page->index << (PAGE_CACHE_SHIFT - bbits)
584 * So, for page sized blocks (4K on 32 bit platforms),
585 * this wraps at around 8Tb (hence MAX_LFS_FILESIZE which is
586 * (((u64)PAGE_CACHE_SIZE << (BITS_PER_LONG-1))-1)
587 * but for smaller blocksizes it is less (bbits = log2 bsize).
588 * Note1: get_block_t takes a long (implicit cast from above)
589 * Note2: The Large Block Device (LBD and HAVE_SECTOR_T) patch
590 * can optionally convert the [unsigned] long from above into
591 * an [unsigned] long long.
594 #if BITS_PER_LONG == 32
595 # if defined(CONFIG_LBDAF)
596 ASSERT(sizeof(sector_t
) == 8);
597 pagefactor
= PAGE_CACHE_SIZE
;
598 bitshift
= BITS_PER_LONG
;
600 pagefactor
= PAGE_CACHE_SIZE
>> (PAGE_CACHE_SHIFT
- blockshift
);
604 return (((__uint64_t
)pagefactor
) << bitshift
) - 1;
608 xfs_set_inode32(struct xfs_mount
*mp
)
610 xfs_agnumber_t index
= 0;
611 xfs_agnumber_t maxagi
= 0;
612 xfs_sb_t
*sbp
= &mp
->m_sb
;
613 xfs_agnumber_t max_metadata
;
614 xfs_agino_t agino
= XFS_OFFBNO_TO_AGINO(mp
, sbp
->sb_agblocks
-1, 0);
615 xfs_ino_t ino
= XFS_AGINO_TO_INO(mp
, sbp
->sb_agcount
-1, agino
);
618 /* Calculate how much should be reserved for inodes to meet
619 * the max inode percentage.
621 if (mp
->m_maxicount
) {
624 icount
= sbp
->sb_dblocks
* sbp
->sb_imax_pct
;
626 icount
+= sbp
->sb_agblocks
- 1;
627 do_div(icount
, sbp
->sb_agblocks
);
628 max_metadata
= icount
;
630 max_metadata
= sbp
->sb_agcount
;
633 for (index
= 0; index
< sbp
->sb_agcount
; index
++) {
634 ino
= XFS_AGINO_TO_INO(mp
, index
, agino
);
636 if (ino
> XFS_MAXINUMBER_32
) {
637 pag
= xfs_perag_get(mp
, index
);
638 pag
->pagi_inodeok
= 0;
639 pag
->pagf_metadata
= 0;
644 pag
= xfs_perag_get(mp
, index
);
645 pag
->pagi_inodeok
= 1;
647 if (index
< max_metadata
)
648 pag
->pagf_metadata
= 1;
651 mp
->m_flags
|= (XFS_MOUNT_32BITINODES
|
652 XFS_MOUNT_SMALL_INUMS
);
658 xfs_set_inode64(struct xfs_mount
*mp
)
660 xfs_agnumber_t index
= 0;
662 for (index
= 0; index
< mp
->m_sb
.sb_agcount
; index
++) {
663 struct xfs_perag
*pag
;
665 pag
= xfs_perag_get(mp
, index
);
666 pag
->pagi_inodeok
= 1;
667 pag
->pagf_metadata
= 0;
671 /* There is no need for lock protection on m_flags,
672 * the rw_semaphore of the VFS superblock is locked
673 * during mount/umount/remount operations, so this is
674 * enough to avoid concurency on the m_flags field
676 mp
->m_flags
&= ~(XFS_MOUNT_32BITINODES
|
677 XFS_MOUNT_SMALL_INUMS
);
685 struct block_device
**bdevp
)
689 *bdevp
= blkdev_get_by_path(name
, FMODE_READ
|FMODE_WRITE
|FMODE_EXCL
,
691 if (IS_ERR(*bdevp
)) {
692 error
= PTR_ERR(*bdevp
);
693 xfs_warn(mp
, "Invalid device [%s], error=%d\n", name
, error
);
701 struct block_device
*bdev
)
704 blkdev_put(bdev
, FMODE_READ
|FMODE_WRITE
|FMODE_EXCL
);
708 xfs_blkdev_issue_flush(
709 xfs_buftarg_t
*buftarg
)
711 blkdev_issue_flush(buftarg
->bt_bdev
, GFP_NOFS
, NULL
);
716 struct xfs_mount
*mp
)
718 if (mp
->m_logdev_targp
&& mp
->m_logdev_targp
!= mp
->m_ddev_targp
) {
719 struct block_device
*logdev
= mp
->m_logdev_targp
->bt_bdev
;
720 xfs_free_buftarg(mp
, mp
->m_logdev_targp
);
721 xfs_blkdev_put(logdev
);
723 if (mp
->m_rtdev_targp
) {
724 struct block_device
*rtdev
= mp
->m_rtdev_targp
->bt_bdev
;
725 xfs_free_buftarg(mp
, mp
->m_rtdev_targp
);
726 xfs_blkdev_put(rtdev
);
728 xfs_free_buftarg(mp
, mp
->m_ddev_targp
);
732 * The file system configurations are:
733 * (1) device (partition) with data and internal log
734 * (2) logical volume with data and log subvolumes.
735 * (3) logical volume with data, log, and realtime subvolumes.
737 * We only have to handle opening the log and realtime volumes here if
738 * they are present. The data subvolume has already been opened by
739 * get_sb_bdev() and is stored in sb->s_bdev.
743 struct xfs_mount
*mp
)
745 struct block_device
*ddev
= mp
->m_super
->s_bdev
;
746 struct block_device
*logdev
= NULL
, *rtdev
= NULL
;
750 * Open real time and log devices - order is important.
753 error
= xfs_blkdev_get(mp
, mp
->m_logname
, &logdev
);
759 error
= xfs_blkdev_get(mp
, mp
->m_rtname
, &rtdev
);
761 goto out_close_logdev
;
763 if (rtdev
== ddev
|| rtdev
== logdev
) {
765 "Cannot mount filesystem with identical rtdev and ddev/logdev.");
767 goto out_close_rtdev
;
772 * Setup xfs_mount buffer target pointers
775 mp
->m_ddev_targp
= xfs_alloc_buftarg(mp
, ddev
, 0, mp
->m_fsname
);
776 if (!mp
->m_ddev_targp
)
777 goto out_close_rtdev
;
780 mp
->m_rtdev_targp
= xfs_alloc_buftarg(mp
, rtdev
, 1,
782 if (!mp
->m_rtdev_targp
)
783 goto out_free_ddev_targ
;
786 if (logdev
&& logdev
!= ddev
) {
787 mp
->m_logdev_targp
= xfs_alloc_buftarg(mp
, logdev
, 1,
789 if (!mp
->m_logdev_targp
)
790 goto out_free_rtdev_targ
;
792 mp
->m_logdev_targp
= mp
->m_ddev_targp
;
798 if (mp
->m_rtdev_targp
)
799 xfs_free_buftarg(mp
, mp
->m_rtdev_targp
);
801 xfs_free_buftarg(mp
, mp
->m_ddev_targp
);
804 xfs_blkdev_put(rtdev
);
806 if (logdev
&& logdev
!= ddev
)
807 xfs_blkdev_put(logdev
);
813 * Setup xfs_mount buffer target pointers based on superblock
817 struct xfs_mount
*mp
)
821 error
= xfs_setsize_buftarg(mp
->m_ddev_targp
, mp
->m_sb
.sb_blocksize
,
822 mp
->m_sb
.sb_sectsize
);
826 if (mp
->m_logdev_targp
&& mp
->m_logdev_targp
!= mp
->m_ddev_targp
) {
827 unsigned int log_sector_size
= BBSIZE
;
829 if (xfs_sb_version_hassector(&mp
->m_sb
))
830 log_sector_size
= mp
->m_sb
.sb_logsectsize
;
831 error
= xfs_setsize_buftarg(mp
->m_logdev_targp
,
832 mp
->m_sb
.sb_blocksize
,
837 if (mp
->m_rtdev_targp
) {
838 error
= xfs_setsize_buftarg(mp
->m_rtdev_targp
,
839 mp
->m_sb
.sb_blocksize
,
840 mp
->m_sb
.sb_sectsize
);
849 xfs_init_mount_workqueues(
850 struct xfs_mount
*mp
)
852 mp
->m_data_workqueue
= alloc_workqueue("xfs-data/%s",
853 WQ_MEM_RECLAIM
, 0, mp
->m_fsname
);
854 if (!mp
->m_data_workqueue
)
857 mp
->m_unwritten_workqueue
= alloc_workqueue("xfs-conv/%s",
858 WQ_MEM_RECLAIM
, 0, mp
->m_fsname
);
859 if (!mp
->m_unwritten_workqueue
)
860 goto out_destroy_data_iodone_queue
;
862 mp
->m_cil_workqueue
= alloc_workqueue("xfs-cil/%s",
863 WQ_MEM_RECLAIM
, 0, mp
->m_fsname
);
864 if (!mp
->m_cil_workqueue
)
865 goto out_destroy_unwritten
;
867 mp
->m_reclaim_workqueue
= alloc_workqueue("xfs-reclaim/%s",
868 WQ_NON_REENTRANT
, 0, mp
->m_fsname
);
869 if (!mp
->m_reclaim_workqueue
)
870 goto out_destroy_cil
;
872 mp
->m_log_workqueue
= alloc_workqueue("xfs-log/%s",
873 WQ_NON_REENTRANT
, 0, mp
->m_fsname
);
874 if (!mp
->m_log_workqueue
)
875 goto out_destroy_reclaim
;
877 mp
->m_eofblocks_workqueue
= alloc_workqueue("xfs-eofblocks/%s",
878 WQ_NON_REENTRANT
, 0, mp
->m_fsname
);
879 if (!mp
->m_eofblocks_workqueue
)
880 goto out_destroy_log
;
885 destroy_workqueue(mp
->m_log_workqueue
);
887 destroy_workqueue(mp
->m_reclaim_workqueue
);
889 destroy_workqueue(mp
->m_cil_workqueue
);
890 out_destroy_unwritten
:
891 destroy_workqueue(mp
->m_unwritten_workqueue
);
892 out_destroy_data_iodone_queue
:
893 destroy_workqueue(mp
->m_data_workqueue
);
899 xfs_destroy_mount_workqueues(
900 struct xfs_mount
*mp
)
902 destroy_workqueue(mp
->m_eofblocks_workqueue
);
903 destroy_workqueue(mp
->m_log_workqueue
);
904 destroy_workqueue(mp
->m_reclaim_workqueue
);
905 destroy_workqueue(mp
->m_cil_workqueue
);
906 destroy_workqueue(mp
->m_data_workqueue
);
907 destroy_workqueue(mp
->m_unwritten_workqueue
);
911 * Flush all dirty data to disk. Must not be called while holding an XFS_ILOCK
912 * or a page lock. We use sync_inodes_sb() here to ensure we block while waiting
913 * for IO to complete so that we effectively throttle multiple callers to the
914 * rate at which IO is completing.
918 struct xfs_mount
*mp
)
920 struct super_block
*sb
= mp
->m_super
;
922 if (down_read_trylock(&sb
->s_umount
)) {
924 up_read(&sb
->s_umount
);
928 /* Catch misguided souls that try to use this interface on XFS */
929 STATIC
struct inode
*
931 struct super_block
*sb
)
938 * Now that the generic code is guaranteed not to be accessing
939 * the linux inode, we can reclaim the inode.
942 xfs_fs_destroy_inode(
945 struct xfs_inode
*ip
= XFS_I(inode
);
947 trace_xfs_destroy_inode(ip
);
949 XFS_STATS_INC(vn_reclaim
);
951 /* bad inode, get out here ASAP */
952 if (is_bad_inode(inode
))
955 ASSERT(XFS_FORCED_SHUTDOWN(ip
->i_mount
) || ip
->i_delayed_blks
== 0);
958 * We should never get here with one of the reclaim flags already set.
960 ASSERT_ALWAYS(!xfs_iflags_test(ip
, XFS_IRECLAIMABLE
));
961 ASSERT_ALWAYS(!xfs_iflags_test(ip
, XFS_IRECLAIM
));
964 * We always use background reclaim here because even if the
965 * inode is clean, it still may be under IO and hence we have
966 * to take the flush lock. The background reclaim path handles
967 * this more efficiently than we can here, so simply let background
968 * reclaim tear down all inodes.
971 xfs_inode_set_reclaim_tag(ip
);
975 * Slab object creation initialisation for the XFS inode.
976 * This covers only the idempotent fields in the XFS inode;
977 * all other fields need to be initialised on allocation
978 * from the slab. This avoids the need to repeatedly initialise
979 * fields in the xfs inode that left in the initialise state
980 * when freeing the inode.
983 xfs_fs_inode_init_once(
986 struct xfs_inode
*ip
= inode
;
988 memset(ip
, 0, sizeof(struct xfs_inode
));
991 inode_init_once(VFS_I(ip
));
994 atomic_set(&ip
->i_pincount
, 0);
995 spin_lock_init(&ip
->i_flags_lock
);
997 mrlock_init(&ip
->i_lock
, MRLOCK_ALLOW_EQUAL_PRI
|MRLOCK_BARRIER
,
998 "xfsino", ip
->i_ino
);
1003 struct inode
*inode
)
1005 xfs_inode_t
*ip
= XFS_I(inode
);
1007 ASSERT(!rwsem_is_locked(&ip
->i_iolock
.mr_lock
));
1009 trace_xfs_evict_inode(ip
);
1011 truncate_inode_pages(&inode
->i_data
, 0);
1013 XFS_STATS_INC(vn_rele
);
1014 XFS_STATS_INC(vn_remove
);
1015 XFS_STATS_DEC(vn_active
);
1021 * We do an unlocked check for XFS_IDONTCACHE here because we are already
1022 * serialised against cache hits here via the inode->i_lock and igrab() in
1023 * xfs_iget_cache_hit(). Hence a lookup that might clear this flag will not be
1024 * racing with us, and it avoids needing to grab a spinlock here for every inode
1025 * we drop the final reference on.
1029 struct inode
*inode
)
1031 struct xfs_inode
*ip
= XFS_I(inode
);
1033 return generic_drop_inode(inode
) || (ip
->i_flags
& XFS_IDONTCACHE
);
1038 struct xfs_mount
*mp
)
1040 kfree(mp
->m_fsname
);
1041 kfree(mp
->m_rtname
);
1042 kfree(mp
->m_logname
);
1047 struct super_block
*sb
)
1049 struct xfs_mount
*mp
= XFS_M(sb
);
1051 xfs_filestream_unmount(mp
);
1055 xfs_icsb_destroy_counters(mp
);
1056 xfs_destroy_mount_workqueues(mp
);
1057 xfs_close_devices(mp
);
1058 xfs_free_fsname(mp
);
1064 struct super_block
*sb
,
1067 struct xfs_mount
*mp
= XFS_M(sb
);
1070 * Doing anything during the async pass would be counterproductive.
1075 xfs_log_force(mp
, XFS_LOG_SYNC
);
1078 * The disk must be active because we're syncing.
1079 * We schedule log work now (now that the disk is
1080 * active) instead of later (when it might not be).
1082 flush_delayed_work(&mp
->m_log
->l_work
);
1090 struct dentry
*dentry
,
1091 struct kstatfs
*statp
)
1093 struct xfs_mount
*mp
= XFS_M(dentry
->d_sb
);
1094 xfs_sb_t
*sbp
= &mp
->m_sb
;
1095 struct xfs_inode
*ip
= XFS_I(dentry
->d_inode
);
1096 __uint64_t fakeinos
, id
;
1100 statp
->f_type
= XFS_SB_MAGIC
;
1101 statp
->f_namelen
= MAXNAMELEN
- 1;
1103 id
= huge_encode_dev(mp
->m_ddev_targp
->bt_dev
);
1104 statp
->f_fsid
.val
[0] = (u32
)id
;
1105 statp
->f_fsid
.val
[1] = (u32
)(id
>> 32);
1107 xfs_icsb_sync_counters(mp
, XFS_ICSB_LAZY_COUNT
);
1109 spin_lock(&mp
->m_sb_lock
);
1110 statp
->f_bsize
= sbp
->sb_blocksize
;
1111 lsize
= sbp
->sb_logstart
? sbp
->sb_logblocks
: 0;
1112 statp
->f_blocks
= sbp
->sb_dblocks
- lsize
;
1113 statp
->f_bfree
= statp
->f_bavail
=
1114 sbp
->sb_fdblocks
- XFS_ALLOC_SET_ASIDE(mp
);
1115 fakeinos
= statp
->f_bfree
<< sbp
->sb_inopblog
;
1117 MIN(sbp
->sb_icount
+ fakeinos
, (__uint64_t
)XFS_MAXINUMBER
);
1118 if (mp
->m_maxicount
)
1119 statp
->f_files
= min_t(typeof(statp
->f_files
),
1123 /* make sure statp->f_ffree does not underflow */
1124 ffree
= statp
->f_files
- (sbp
->sb_icount
- sbp
->sb_ifree
);
1125 statp
->f_ffree
= max_t(__int64_t
, ffree
, 0);
1127 spin_unlock(&mp
->m_sb_lock
);
1129 if ((ip
->i_d
.di_flags
& XFS_DIFLAG_PROJINHERIT
) &&
1130 ((mp
->m_qflags
& (XFS_PQUOTA_ACCT
|XFS_OQUOTA_ENFD
))) ==
1131 (XFS_PQUOTA_ACCT
|XFS_OQUOTA_ENFD
))
1132 xfs_qm_statvfs(ip
, statp
);
1137 xfs_save_resvblks(struct xfs_mount
*mp
)
1139 __uint64_t resblks
= 0;
1141 mp
->m_resblks_save
= mp
->m_resblks
;
1142 xfs_reserve_blocks(mp
, &resblks
, NULL
);
1146 xfs_restore_resvblks(struct xfs_mount
*mp
)
1150 if (mp
->m_resblks_save
) {
1151 resblks
= mp
->m_resblks_save
;
1152 mp
->m_resblks_save
= 0;
1154 resblks
= xfs_default_resblks(mp
);
1156 xfs_reserve_blocks(mp
, &resblks
, NULL
);
1160 * Trigger writeback of all the dirty metadata in the file system.
1162 * This ensures that the metadata is written to their location on disk rather
1163 * than just existing in transactions in the log. This means after a quiesce
1164 * there is no log replay required to write the inodes to disk - this is the
1165 * primary difference between a sync and a quiesce.
1167 * Note: xfs_log_quiesce() stops background log work - the callers must ensure
1168 * it is started again when appropriate.
1172 struct xfs_mount
*mp
)
1176 /* wait for all modifications to complete */
1177 while (atomic_read(&mp
->m_active_trans
) > 0)
1180 /* force the log to unpin objects from the now complete transactions */
1181 xfs_log_force(mp
, XFS_LOG_SYNC
);
1183 /* reclaim inodes to do any IO before the freeze completes */
1184 xfs_reclaim_inodes(mp
, 0);
1185 xfs_reclaim_inodes(mp
, SYNC_WAIT
);
1187 /* Push the superblock and write an unmount record */
1188 error
= xfs_log_sbcount(mp
);
1190 xfs_warn(mp
, "xfs_attr_quiesce: failed to log sb changes. "
1191 "Frozen image may not be consistent.");
1193 * Just warn here till VFS can correctly support
1194 * read-only remount without racing.
1196 WARN_ON(atomic_read(&mp
->m_active_trans
) != 0);
1198 xfs_log_quiesce(mp
);
1203 struct super_block
*sb
,
1207 struct xfs_mount
*mp
= XFS_M(sb
);
1208 substring_t args
[MAX_OPT_ARGS
];
1212 while ((p
= strsep(&options
, ",")) != NULL
) {
1218 token
= match_token(p
, tokens
, args
);
1221 mp
->m_flags
|= XFS_MOUNT_BARRIER
;
1224 mp
->m_flags
&= ~XFS_MOUNT_BARRIER
;
1227 mp
->m_maxagi
= xfs_set_inode64(mp
);
1230 mp
->m_maxagi
= xfs_set_inode32(mp
);
1234 * Logically we would return an error here to prevent
1235 * users from believing they might have changed
1236 * mount options using remount which can't be changed.
1238 * But unfortunately mount(8) adds all options from
1239 * mtab and fstab to the mount arguments in some cases
1240 * so we can't blindly reject options, but have to
1241 * check for each specified option if it actually
1242 * differs from the currently set option and only
1243 * reject it if that's the case.
1245 * Until that is implemented we return success for
1246 * every remount request, and silently ignore all
1247 * options that we can't actually change.
1251 "mount option \"%s\" not supported for remount\n", p
);
1260 if ((mp
->m_flags
& XFS_MOUNT_RDONLY
) && !(*flags
& MS_RDONLY
)) {
1261 mp
->m_flags
&= ~XFS_MOUNT_RDONLY
;
1264 * If this is the first remount to writeable state we
1265 * might have some superblock changes to update.
1267 if (mp
->m_update_flags
) {
1268 error
= xfs_mount_log_sb(mp
, mp
->m_update_flags
);
1270 xfs_warn(mp
, "failed to write sb changes");
1273 mp
->m_update_flags
= 0;
1277 * Fill out the reserve pool if it is empty. Use the stashed
1278 * value if it is non-zero, otherwise go with the default.
1280 xfs_restore_resvblks(mp
);
1281 xfs_log_work_queue(mp
);
1285 if (!(mp
->m_flags
& XFS_MOUNT_RDONLY
) && (*flags
& MS_RDONLY
)) {
1287 * Before we sync the metadata, we need to free up the reserve
1288 * block pool so that the used block count in the superblock on
1289 * disk is correct at the end of the remount. Stash the current
1290 * reserve pool size so that if we get remounted rw, we can
1291 * return it to the same size.
1293 xfs_save_resvblks(mp
);
1294 xfs_quiesce_attr(mp
);
1295 mp
->m_flags
|= XFS_MOUNT_RDONLY
;
1302 * Second stage of a freeze. The data is already frozen so we only
1303 * need to take care of the metadata. Once that's done write a dummy
1304 * record to dirty the log in case of a crash while frozen.
1308 struct super_block
*sb
)
1310 struct xfs_mount
*mp
= XFS_M(sb
);
1312 xfs_save_resvblks(mp
);
1313 xfs_quiesce_attr(mp
);
1314 return -xfs_fs_log_dummy(mp
);
1319 struct super_block
*sb
)
1321 struct xfs_mount
*mp
= XFS_M(sb
);
1323 xfs_restore_resvblks(mp
);
1324 xfs_log_work_queue(mp
);
1329 xfs_fs_show_options(
1331 struct dentry
*root
)
1333 return -xfs_showargs(XFS_M(root
->d_sb
), m
);
1337 * This function fills in xfs_mount_t fields based on mount args.
1338 * Note: the superblock _has_ now been read in.
1342 struct xfs_mount
*mp
)
1344 int ronly
= (mp
->m_flags
& XFS_MOUNT_RDONLY
);
1346 /* Fail a mount where the logbuf is smaller than the log stripe */
1347 if (xfs_sb_version_haslogv2(&mp
->m_sb
)) {
1348 if (mp
->m_logbsize
<= 0 &&
1349 mp
->m_sb
.sb_logsunit
> XLOG_BIG_RECORD_BSIZE
) {
1350 mp
->m_logbsize
= mp
->m_sb
.sb_logsunit
;
1351 } else if (mp
->m_logbsize
> 0 &&
1352 mp
->m_logbsize
< mp
->m_sb
.sb_logsunit
) {
1354 "logbuf size must be greater than or equal to log stripe size");
1355 return XFS_ERROR(EINVAL
);
1358 /* Fail a mount if the logbuf is larger than 32K */
1359 if (mp
->m_logbsize
> XLOG_BIG_RECORD_BSIZE
) {
1361 "logbuf size for version 1 logs must be 16K or 32K");
1362 return XFS_ERROR(EINVAL
);
1367 * mkfs'ed attr2 will turn on attr2 mount unless explicitly
1368 * told by noattr2 to turn it off
1370 if (xfs_sb_version_hasattr2(&mp
->m_sb
) &&
1371 !(mp
->m_flags
& XFS_MOUNT_NOATTR2
))
1372 mp
->m_flags
|= XFS_MOUNT_ATTR2
;
1375 * prohibit r/w mounts of read-only filesystems
1377 if ((mp
->m_sb
.sb_flags
& XFS_SBF_READONLY
) && !ronly
) {
1379 "cannot mount a read-only filesystem as read-write");
1380 return XFS_ERROR(EROFS
);
1388 struct super_block
*sb
,
1393 struct xfs_mount
*mp
= NULL
;
1394 int flags
= 0, error
= ENOMEM
;
1396 mp
= kzalloc(sizeof(struct xfs_mount
), GFP_KERNEL
);
1400 spin_lock_init(&mp
->m_sb_lock
);
1401 mutex_init(&mp
->m_growlock
);
1402 atomic_set(&mp
->m_active_trans
, 0);
1403 INIT_DELAYED_WORK(&mp
->m_reclaim_work
, xfs_reclaim_worker
);
1404 INIT_DELAYED_WORK(&mp
->m_eofblocks_work
, xfs_eofblocks_worker
);
1409 error
= xfs_parseargs(mp
, (char *)data
);
1411 goto out_free_fsname
;
1413 sb_min_blocksize(sb
, BBSIZE
);
1414 sb
->s_xattr
= xfs_xattr_handlers
;
1415 sb
->s_export_op
= &xfs_export_operations
;
1416 #ifdef CONFIG_XFS_QUOTA
1417 sb
->s_qcop
= &xfs_quotactl_operations
;
1419 sb
->s_op
= &xfs_super_operations
;
1422 flags
|= XFS_MFSI_QUIET
;
1424 error
= xfs_open_devices(mp
);
1426 goto out_free_fsname
;
1428 error
= xfs_init_mount_workqueues(mp
);
1430 goto out_close_devices
;
1432 error
= xfs_icsb_init_counters(mp
);
1434 goto out_destroy_workqueues
;
1436 error
= xfs_readsb(mp
, flags
);
1438 goto out_destroy_counters
;
1440 error
= xfs_finish_flags(mp
);
1444 error
= xfs_setup_devices(mp
);
1448 error
= xfs_filestream_mount(mp
);
1453 * we must configure the block size in the superblock before we run the
1454 * full mount process as the mount process can lookup and cache inodes.
1456 sb
->s_magic
= XFS_SB_MAGIC
;
1457 sb
->s_blocksize
= mp
->m_sb
.sb_blocksize
;
1458 sb
->s_blocksize_bits
= ffs(sb
->s_blocksize
) - 1;
1459 sb
->s_maxbytes
= xfs_max_file_offset(sb
->s_blocksize_bits
);
1460 sb
->s_max_links
= XFS_MAXLINK
;
1461 sb
->s_time_gran
= 1;
1462 set_posix_acl_flag(sb
);
1464 error
= xfs_mountfs(mp
);
1466 goto out_filestream_unmount
;
1468 root
= igrab(VFS_I(mp
->m_rootip
));
1473 if (is_bad_inode(root
)) {
1477 sb
->s_root
= d_make_root(root
);
1485 out_filestream_unmount
:
1486 xfs_filestream_unmount(mp
);
1489 out_destroy_counters
:
1490 xfs_icsb_destroy_counters(mp
);
1491 out_destroy_workqueues
:
1492 xfs_destroy_mount_workqueues(mp
);
1494 xfs_close_devices(mp
);
1496 xfs_free_fsname(mp
);
1502 xfs_filestream_unmount(mp
);
1507 STATIC
struct dentry
*
1509 struct file_system_type
*fs_type
,
1511 const char *dev_name
,
1514 return mount_bdev(fs_type
, flags
, dev_name
, data
, xfs_fs_fill_super
);
1518 xfs_fs_nr_cached_objects(
1519 struct super_block
*sb
)
1521 return xfs_reclaim_inodes_count(XFS_M(sb
));
1525 xfs_fs_free_cached_objects(
1526 struct super_block
*sb
,
1529 xfs_reclaim_inodes_nr(XFS_M(sb
), nr_to_scan
);
1532 static const struct super_operations xfs_super_operations
= {
1533 .alloc_inode
= xfs_fs_alloc_inode
,
1534 .destroy_inode
= xfs_fs_destroy_inode
,
1535 .evict_inode
= xfs_fs_evict_inode
,
1536 .drop_inode
= xfs_fs_drop_inode
,
1537 .put_super
= xfs_fs_put_super
,
1538 .sync_fs
= xfs_fs_sync_fs
,
1539 .freeze_fs
= xfs_fs_freeze
,
1540 .unfreeze_fs
= xfs_fs_unfreeze
,
1541 .statfs
= xfs_fs_statfs
,
1542 .remount_fs
= xfs_fs_remount
,
1543 .show_options
= xfs_fs_show_options
,
1544 .nr_cached_objects
= xfs_fs_nr_cached_objects
,
1545 .free_cached_objects
= xfs_fs_free_cached_objects
,
1548 static struct file_system_type xfs_fs_type
= {
1549 .owner
= THIS_MODULE
,
1551 .mount
= xfs_fs_mount
,
1552 .kill_sb
= kill_block_super
,
1553 .fs_flags
= FS_REQUIRES_DEV
,
1557 xfs_init_zones(void)
1560 xfs_ioend_zone
= kmem_zone_init(sizeof(xfs_ioend_t
), "xfs_ioend");
1561 if (!xfs_ioend_zone
)
1564 xfs_ioend_pool
= mempool_create_slab_pool(4 * MAX_BUF_PER_PAGE
,
1566 if (!xfs_ioend_pool
)
1567 goto out_destroy_ioend_zone
;
1569 xfs_log_ticket_zone
= kmem_zone_init(sizeof(xlog_ticket_t
),
1571 if (!xfs_log_ticket_zone
)
1572 goto out_destroy_ioend_pool
;
1574 xfs_bmap_free_item_zone
= kmem_zone_init(sizeof(xfs_bmap_free_item_t
),
1575 "xfs_bmap_free_item");
1576 if (!xfs_bmap_free_item_zone
)
1577 goto out_destroy_log_ticket_zone
;
1579 xfs_btree_cur_zone
= kmem_zone_init(sizeof(xfs_btree_cur_t
),
1581 if (!xfs_btree_cur_zone
)
1582 goto out_destroy_bmap_free_item_zone
;
1584 xfs_da_state_zone
= kmem_zone_init(sizeof(xfs_da_state_t
),
1586 if (!xfs_da_state_zone
)
1587 goto out_destroy_btree_cur_zone
;
1589 xfs_ifork_zone
= kmem_zone_init(sizeof(xfs_ifork_t
), "xfs_ifork");
1590 if (!xfs_ifork_zone
)
1591 goto out_destroy_da_state_zone
;
1593 xfs_trans_zone
= kmem_zone_init(sizeof(xfs_trans_t
), "xfs_trans");
1594 if (!xfs_trans_zone
)
1595 goto out_destroy_ifork_zone
;
1597 xfs_log_item_desc_zone
=
1598 kmem_zone_init(sizeof(struct xfs_log_item_desc
),
1599 "xfs_log_item_desc");
1600 if (!xfs_log_item_desc_zone
)
1601 goto out_destroy_trans_zone
;
1604 * The size of the zone allocated buf log item is the maximum
1605 * size possible under XFS. This wastes a little bit of memory,
1606 * but it is much faster.
1608 xfs_buf_item_zone
= kmem_zone_init(sizeof(struct xfs_buf_log_item
),
1610 if (!xfs_buf_item_zone
)
1611 goto out_destroy_log_item_desc_zone
;
1613 xfs_efd_zone
= kmem_zone_init((sizeof(xfs_efd_log_item_t
) +
1614 ((XFS_EFD_MAX_FAST_EXTENTS
- 1) *
1615 sizeof(xfs_extent_t
))), "xfs_efd_item");
1617 goto out_destroy_buf_item_zone
;
1619 xfs_efi_zone
= kmem_zone_init((sizeof(xfs_efi_log_item_t
) +
1620 ((XFS_EFI_MAX_FAST_EXTENTS
- 1) *
1621 sizeof(xfs_extent_t
))), "xfs_efi_item");
1623 goto out_destroy_efd_zone
;
1626 kmem_zone_init_flags(sizeof(xfs_inode_t
), "xfs_inode",
1627 KM_ZONE_HWALIGN
| KM_ZONE_RECLAIM
| KM_ZONE_SPREAD
,
1628 xfs_fs_inode_init_once
);
1629 if (!xfs_inode_zone
)
1630 goto out_destroy_efi_zone
;
1633 kmem_zone_init_flags(sizeof(xfs_inode_log_item_t
), "xfs_ili",
1634 KM_ZONE_SPREAD
, NULL
);
1636 goto out_destroy_inode_zone
;
1640 out_destroy_inode_zone
:
1641 kmem_zone_destroy(xfs_inode_zone
);
1642 out_destroy_efi_zone
:
1643 kmem_zone_destroy(xfs_efi_zone
);
1644 out_destroy_efd_zone
:
1645 kmem_zone_destroy(xfs_efd_zone
);
1646 out_destroy_buf_item_zone
:
1647 kmem_zone_destroy(xfs_buf_item_zone
);
1648 out_destroy_log_item_desc_zone
:
1649 kmem_zone_destroy(xfs_log_item_desc_zone
);
1650 out_destroy_trans_zone
:
1651 kmem_zone_destroy(xfs_trans_zone
);
1652 out_destroy_ifork_zone
:
1653 kmem_zone_destroy(xfs_ifork_zone
);
1654 out_destroy_da_state_zone
:
1655 kmem_zone_destroy(xfs_da_state_zone
);
1656 out_destroy_btree_cur_zone
:
1657 kmem_zone_destroy(xfs_btree_cur_zone
);
1658 out_destroy_bmap_free_item_zone
:
1659 kmem_zone_destroy(xfs_bmap_free_item_zone
);
1660 out_destroy_log_ticket_zone
:
1661 kmem_zone_destroy(xfs_log_ticket_zone
);
1662 out_destroy_ioend_pool
:
1663 mempool_destroy(xfs_ioend_pool
);
1664 out_destroy_ioend_zone
:
1665 kmem_zone_destroy(xfs_ioend_zone
);
1671 xfs_destroy_zones(void)
1674 * Make sure all delayed rcu free are flushed before we
1678 kmem_zone_destroy(xfs_ili_zone
);
1679 kmem_zone_destroy(xfs_inode_zone
);
1680 kmem_zone_destroy(xfs_efi_zone
);
1681 kmem_zone_destroy(xfs_efd_zone
);
1682 kmem_zone_destroy(xfs_buf_item_zone
);
1683 kmem_zone_destroy(xfs_log_item_desc_zone
);
1684 kmem_zone_destroy(xfs_trans_zone
);
1685 kmem_zone_destroy(xfs_ifork_zone
);
1686 kmem_zone_destroy(xfs_da_state_zone
);
1687 kmem_zone_destroy(xfs_btree_cur_zone
);
1688 kmem_zone_destroy(xfs_bmap_free_item_zone
);
1689 kmem_zone_destroy(xfs_log_ticket_zone
);
1690 mempool_destroy(xfs_ioend_pool
);
1691 kmem_zone_destroy(xfs_ioend_zone
);
1696 xfs_init_workqueues(void)
1699 * The allocation workqueue can be used in memory reclaim situations
1700 * (writepage path), and parallelism is only limited by the number of
1701 * AGs in all the filesystems mounted. Hence use the default large
1702 * max_active value for this workqueue.
1704 xfs_alloc_wq
= alloc_workqueue("xfsalloc", WQ_MEM_RECLAIM
, 0);
1712 xfs_destroy_workqueues(void)
1714 destroy_workqueue(xfs_alloc_wq
);
1722 printk(KERN_INFO XFS_VERSION_STRING
" with "
1723 XFS_BUILD_OPTIONS
" enabled\n");
1727 error
= xfs_init_zones();
1731 error
= xfs_init_workqueues();
1733 goto out_destroy_zones
;
1735 error
= xfs_mru_cache_init();
1737 goto out_destroy_wq
;
1739 error
= xfs_filestream_init();
1741 goto out_mru_cache_uninit
;
1743 error
= xfs_buf_init();
1745 goto out_filestream_uninit
;
1747 error
= xfs_init_procfs();
1749 goto out_buf_terminate
;
1751 error
= xfs_sysctl_register();
1753 goto out_cleanup_procfs
;
1755 error
= xfs_qm_init();
1757 goto out_sysctl_unregister
;
1759 error
= register_filesystem(&xfs_fs_type
);
1766 out_sysctl_unregister
:
1767 xfs_sysctl_unregister();
1769 xfs_cleanup_procfs();
1771 xfs_buf_terminate();
1772 out_filestream_uninit
:
1773 xfs_filestream_uninit();
1774 out_mru_cache_uninit
:
1775 xfs_mru_cache_uninit();
1777 xfs_destroy_workqueues();
1779 xfs_destroy_zones();
1788 unregister_filesystem(&xfs_fs_type
);
1789 xfs_sysctl_unregister();
1790 xfs_cleanup_procfs();
1791 xfs_buf_terminate();
1792 xfs_filestream_uninit();
1793 xfs_mru_cache_uninit();
1794 xfs_destroy_workqueues();
1795 xfs_destroy_zones();
1798 module_init(init_xfs_fs
);
1799 module_exit(exit_xfs_fs
);
1801 MODULE_AUTHOR("Silicon Graphics, Inc.");
1802 MODULE_DESCRIPTION(XFS_VERSION_STRING
" with " XFS_BUILD_OPTIONS
" enabled");
1803 MODULE_LICENSE("GPL");