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
23 #include "xfs_trans.h"
27 #include "xfs_alloc.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_dinode.h"
34 #include "xfs_inode.h"
35 #include "xfs_btree.h"
36 #include "xfs_btree_trace.h"
37 #include "xfs_ialloc.h"
39 #include "xfs_rtalloc.h"
40 #include "xfs_error.h"
41 #include "xfs_itable.h"
42 #include "xfs_fsops.h"
44 #include "xfs_buf_item.h"
45 #include "xfs_utils.h"
46 #include "xfs_vnodeops.h"
47 #include "xfs_version.h"
48 #include "xfs_log_priv.h"
49 #include "xfs_trans_priv.h"
50 #include "xfs_filestream.h"
51 #include "xfs_da_btree.h"
52 #include "xfs_extfree_item.h"
53 #include "xfs_mru_cache.h"
54 #include "xfs_inode_item.h"
56 #include "xfs_trace.h"
58 #include <linux/namei.h>
59 #include <linux/init.h>
60 #include <linux/slab.h>
61 #include <linux/mount.h>
62 #include <linux/mempool.h>
63 #include <linux/writeback.h>
64 #include <linux/kthread.h>
65 #include <linux/freezer.h>
66 #include <linux/parser.h>
68 static const struct super_operations xfs_super_operations
;
69 static kmem_zone_t
*xfs_ioend_zone
;
70 mempool_t
*xfs_ioend_pool
;
72 #define MNTOPT_LOGBUFS "logbufs" /* number of XFS log buffers */
73 #define MNTOPT_LOGBSIZE "logbsize" /* size of XFS log buffers */
74 #define MNTOPT_LOGDEV "logdev" /* log device */
75 #define MNTOPT_RTDEV "rtdev" /* realtime I/O device */
76 #define MNTOPT_BIOSIZE "biosize" /* log2 of preferred buffered io size */
77 #define MNTOPT_WSYNC "wsync" /* safe-mode nfs compatible mount */
78 #define MNTOPT_NOALIGN "noalign" /* turn off stripe alignment */
79 #define MNTOPT_SWALLOC "swalloc" /* turn on stripe width allocation */
80 #define MNTOPT_SUNIT "sunit" /* data volume stripe unit */
81 #define MNTOPT_SWIDTH "swidth" /* data volume stripe width */
82 #define MNTOPT_NOUUID "nouuid" /* ignore filesystem UUID */
83 #define MNTOPT_MTPT "mtpt" /* filesystem mount point */
84 #define MNTOPT_GRPID "grpid" /* group-ID from parent directory */
85 #define MNTOPT_NOGRPID "nogrpid" /* group-ID from current process */
86 #define MNTOPT_BSDGROUPS "bsdgroups" /* group-ID from parent directory */
87 #define MNTOPT_SYSVGROUPS "sysvgroups" /* group-ID from current process */
88 #define MNTOPT_ALLOCSIZE "allocsize" /* preferred allocation size */
89 #define MNTOPT_NORECOVERY "norecovery" /* don't run XFS recovery */
90 #define MNTOPT_BARRIER "barrier" /* use writer barriers for log write and
91 * unwritten extent conversion */
92 #define MNTOPT_NOBARRIER "nobarrier" /* .. disable */
93 #define MNTOPT_OSYNCISOSYNC "osyncisosync" /* o_sync is REALLY o_sync */
94 #define MNTOPT_64BITINODE "inode64" /* inodes can be allocated anywhere */
95 #define MNTOPT_IKEEP "ikeep" /* do not free empty inode clusters */
96 #define MNTOPT_NOIKEEP "noikeep" /* free empty inode clusters */
97 #define MNTOPT_LARGEIO "largeio" /* report large I/O sizes in stat() */
98 #define MNTOPT_NOLARGEIO "nolargeio" /* do not report large I/O sizes
100 #define MNTOPT_ATTR2 "attr2" /* do use attr2 attribute format */
101 #define MNTOPT_NOATTR2 "noattr2" /* do not use attr2 attribute format */
102 #define MNTOPT_FILESTREAM "filestreams" /* use filestreams allocator */
103 #define MNTOPT_QUOTA "quota" /* disk quotas (user) */
104 #define MNTOPT_NOQUOTA "noquota" /* no quotas */
105 #define MNTOPT_USRQUOTA "usrquota" /* user quota enabled */
106 #define MNTOPT_GRPQUOTA "grpquota" /* group quota enabled */
107 #define MNTOPT_PRJQUOTA "prjquota" /* project quota enabled */
108 #define MNTOPT_UQUOTA "uquota" /* user quota (IRIX variant) */
109 #define MNTOPT_GQUOTA "gquota" /* group quota (IRIX variant) */
110 #define MNTOPT_PQUOTA "pquota" /* project quota (IRIX variant) */
111 #define MNTOPT_UQUOTANOENF "uqnoenforce"/* user quota limit enforcement */
112 #define MNTOPT_GQUOTANOENF "gqnoenforce"/* group quota limit enforcement */
113 #define MNTOPT_PQUOTANOENF "pqnoenforce"/* project quota limit enforcement */
114 #define MNTOPT_QUOTANOENF "qnoenforce" /* same as uqnoenforce */
115 #define MNTOPT_DELAYLOG "delaylog" /* Delayed loging enabled */
116 #define MNTOPT_NODELAYLOG "nodelaylog" /* Delayed loging disabled */
119 * Table driven mount option parser.
121 * Currently only used for remount, but it will be used for mount
122 * in the future, too.
125 Opt_barrier
, Opt_nobarrier
, Opt_err
128 static const match_table_t tokens
= {
129 {Opt_barrier
, "barrier"},
130 {Opt_nobarrier
, "nobarrier"},
136 suffix_strtoul(char *s
, char **endp
, unsigned int base
)
138 int last
, shift_left_factor
= 0;
141 last
= strlen(value
) - 1;
142 if (value
[last
] == 'K' || value
[last
] == 'k') {
143 shift_left_factor
= 10;
146 if (value
[last
] == 'M' || value
[last
] == 'm') {
147 shift_left_factor
= 20;
150 if (value
[last
] == 'G' || value
[last
] == 'g') {
151 shift_left_factor
= 30;
155 return simple_strtoul((const char *)s
, endp
, base
) << shift_left_factor
;
159 * This function fills in xfs_mount_t fields based on mount args.
160 * Note: the superblock has _not_ yet been read in.
162 * Note that this function leaks the various device name allocations on
163 * failure. The caller takes care of them.
167 struct xfs_mount
*mp
,
170 struct super_block
*sb
= mp
->m_super
;
171 char *this_char
, *value
, *eov
;
175 __uint8_t iosizelog
= 0;
178 * Copy binary VFS mount flags we are interested in.
180 if (sb
->s_flags
& MS_RDONLY
)
181 mp
->m_flags
|= XFS_MOUNT_RDONLY
;
182 if (sb
->s_flags
& MS_DIRSYNC
)
183 mp
->m_flags
|= XFS_MOUNT_DIRSYNC
;
184 if (sb
->s_flags
& MS_SYNCHRONOUS
)
185 mp
->m_flags
|= XFS_MOUNT_WSYNC
;
188 * Set some default flags that could be cleared by the mount option
191 mp
->m_flags
|= XFS_MOUNT_BARRIER
;
192 mp
->m_flags
|= XFS_MOUNT_COMPAT_IOSIZE
;
193 mp
->m_flags
|= XFS_MOUNT_SMALL_INUMS
;
196 * These can be overridden by the mount option parsing.
204 while ((this_char
= strsep(&options
, ",")) != NULL
) {
207 if ((value
= strchr(this_char
, '=')) != NULL
)
210 if (!strcmp(this_char
, MNTOPT_LOGBUFS
)) {
211 if (!value
|| !*value
) {
213 "XFS: %s option requires an argument",
217 mp
->m_logbufs
= simple_strtoul(value
, &eov
, 10);
218 } else if (!strcmp(this_char
, MNTOPT_LOGBSIZE
)) {
219 if (!value
|| !*value
) {
221 "XFS: %s option requires an argument",
225 mp
->m_logbsize
= suffix_strtoul(value
, &eov
, 10);
226 } else if (!strcmp(this_char
, MNTOPT_LOGDEV
)) {
227 if (!value
|| !*value
) {
229 "XFS: %s option requires an argument",
233 mp
->m_logname
= kstrndup(value
, MAXNAMELEN
, GFP_KERNEL
);
236 } else if (!strcmp(this_char
, MNTOPT_MTPT
)) {
238 "XFS: %s option not allowed on this system",
241 } else if (!strcmp(this_char
, MNTOPT_RTDEV
)) {
242 if (!value
|| !*value
) {
244 "XFS: %s option requires an argument",
248 mp
->m_rtname
= kstrndup(value
, MAXNAMELEN
, GFP_KERNEL
);
251 } else if (!strcmp(this_char
, MNTOPT_BIOSIZE
)) {
252 if (!value
|| !*value
) {
254 "XFS: %s option requires an argument",
258 iosize
= simple_strtoul(value
, &eov
, 10);
259 iosizelog
= ffs(iosize
) - 1;
260 } else if (!strcmp(this_char
, MNTOPT_ALLOCSIZE
)) {
261 if (!value
|| !*value
) {
263 "XFS: %s option requires an argument",
267 iosize
= suffix_strtoul(value
, &eov
, 10);
268 iosizelog
= ffs(iosize
) - 1;
269 } else if (!strcmp(this_char
, MNTOPT_GRPID
) ||
270 !strcmp(this_char
, MNTOPT_BSDGROUPS
)) {
271 mp
->m_flags
|= XFS_MOUNT_GRPID
;
272 } else if (!strcmp(this_char
, MNTOPT_NOGRPID
) ||
273 !strcmp(this_char
, MNTOPT_SYSVGROUPS
)) {
274 mp
->m_flags
&= ~XFS_MOUNT_GRPID
;
275 } else if (!strcmp(this_char
, MNTOPT_WSYNC
)) {
276 mp
->m_flags
|= XFS_MOUNT_WSYNC
;
277 } else if (!strcmp(this_char
, MNTOPT_OSYNCISOSYNC
)) {
278 mp
->m_flags
|= XFS_MOUNT_OSYNCISOSYNC
;
279 } else if (!strcmp(this_char
, MNTOPT_NORECOVERY
)) {
280 mp
->m_flags
|= XFS_MOUNT_NORECOVERY
;
281 } else if (!strcmp(this_char
, MNTOPT_NOALIGN
)) {
282 mp
->m_flags
|= XFS_MOUNT_NOALIGN
;
283 } else if (!strcmp(this_char
, MNTOPT_SWALLOC
)) {
284 mp
->m_flags
|= XFS_MOUNT_SWALLOC
;
285 } else if (!strcmp(this_char
, MNTOPT_SUNIT
)) {
286 if (!value
|| !*value
) {
288 "XFS: %s option requires an argument",
292 dsunit
= simple_strtoul(value
, &eov
, 10);
293 } else if (!strcmp(this_char
, MNTOPT_SWIDTH
)) {
294 if (!value
|| !*value
) {
296 "XFS: %s option requires an argument",
300 dswidth
= simple_strtoul(value
, &eov
, 10);
301 } else if (!strcmp(this_char
, MNTOPT_64BITINODE
)) {
302 mp
->m_flags
&= ~XFS_MOUNT_SMALL_INUMS
;
305 "XFS: %s option not allowed on this system",
309 } else if (!strcmp(this_char
, MNTOPT_NOUUID
)) {
310 mp
->m_flags
|= XFS_MOUNT_NOUUID
;
311 } else if (!strcmp(this_char
, MNTOPT_BARRIER
)) {
312 mp
->m_flags
|= XFS_MOUNT_BARRIER
;
313 } else if (!strcmp(this_char
, MNTOPT_NOBARRIER
)) {
314 mp
->m_flags
&= ~XFS_MOUNT_BARRIER
;
315 } else if (!strcmp(this_char
, MNTOPT_IKEEP
)) {
316 mp
->m_flags
|= XFS_MOUNT_IKEEP
;
317 } else if (!strcmp(this_char
, MNTOPT_NOIKEEP
)) {
318 mp
->m_flags
&= ~XFS_MOUNT_IKEEP
;
319 } else if (!strcmp(this_char
, MNTOPT_LARGEIO
)) {
320 mp
->m_flags
&= ~XFS_MOUNT_COMPAT_IOSIZE
;
321 } else if (!strcmp(this_char
, MNTOPT_NOLARGEIO
)) {
322 mp
->m_flags
|= XFS_MOUNT_COMPAT_IOSIZE
;
323 } else if (!strcmp(this_char
, MNTOPT_ATTR2
)) {
324 mp
->m_flags
|= XFS_MOUNT_ATTR2
;
325 } else if (!strcmp(this_char
, MNTOPT_NOATTR2
)) {
326 mp
->m_flags
&= ~XFS_MOUNT_ATTR2
;
327 mp
->m_flags
|= XFS_MOUNT_NOATTR2
;
328 } else if (!strcmp(this_char
, MNTOPT_FILESTREAM
)) {
329 mp
->m_flags
|= XFS_MOUNT_FILESTREAMS
;
330 } else if (!strcmp(this_char
, MNTOPT_NOQUOTA
)) {
331 mp
->m_qflags
&= ~(XFS_UQUOTA_ACCT
| XFS_UQUOTA_ACTIVE
|
332 XFS_GQUOTA_ACCT
| XFS_GQUOTA_ACTIVE
|
333 XFS_PQUOTA_ACCT
| XFS_PQUOTA_ACTIVE
|
334 XFS_UQUOTA_ENFD
| XFS_OQUOTA_ENFD
);
335 } else if (!strcmp(this_char
, MNTOPT_QUOTA
) ||
336 !strcmp(this_char
, MNTOPT_UQUOTA
) ||
337 !strcmp(this_char
, MNTOPT_USRQUOTA
)) {
338 mp
->m_qflags
|= (XFS_UQUOTA_ACCT
| XFS_UQUOTA_ACTIVE
|
340 } else if (!strcmp(this_char
, MNTOPT_QUOTANOENF
) ||
341 !strcmp(this_char
, MNTOPT_UQUOTANOENF
)) {
342 mp
->m_qflags
|= (XFS_UQUOTA_ACCT
| XFS_UQUOTA_ACTIVE
);
343 mp
->m_qflags
&= ~XFS_UQUOTA_ENFD
;
344 } else if (!strcmp(this_char
, MNTOPT_PQUOTA
) ||
345 !strcmp(this_char
, MNTOPT_PRJQUOTA
)) {
346 mp
->m_qflags
|= (XFS_PQUOTA_ACCT
| XFS_PQUOTA_ACTIVE
|
348 } else if (!strcmp(this_char
, MNTOPT_PQUOTANOENF
)) {
349 mp
->m_qflags
|= (XFS_PQUOTA_ACCT
| XFS_PQUOTA_ACTIVE
);
350 mp
->m_qflags
&= ~XFS_OQUOTA_ENFD
;
351 } else if (!strcmp(this_char
, MNTOPT_GQUOTA
) ||
352 !strcmp(this_char
, MNTOPT_GRPQUOTA
)) {
353 mp
->m_qflags
|= (XFS_GQUOTA_ACCT
| XFS_GQUOTA_ACTIVE
|
355 } else if (!strcmp(this_char
, MNTOPT_GQUOTANOENF
)) {
356 mp
->m_qflags
|= (XFS_GQUOTA_ACCT
| XFS_GQUOTA_ACTIVE
);
357 mp
->m_qflags
&= ~XFS_OQUOTA_ENFD
;
358 } else if (!strcmp(this_char
, MNTOPT_DELAYLOG
)) {
359 mp
->m_flags
|= XFS_MOUNT_DELAYLOG
;
361 "Enabling EXPERIMENTAL delayed logging feature "
362 "- use at your own risk.\n");
363 } else if (!strcmp(this_char
, MNTOPT_NODELAYLOG
)) {
364 mp
->m_flags
&= ~XFS_MOUNT_DELAYLOG
;
365 } else if (!strcmp(this_char
, "ihashsize")) {
367 "XFS: ihashsize no longer used, option is deprecated.");
368 } else if (!strcmp(this_char
, "osyncisdsync")) {
369 /* no-op, this is now the default */
371 "XFS: osyncisdsync is now the default, option is deprecated.");
372 } else if (!strcmp(this_char
, "irixsgid")) {
374 "XFS: irixsgid is now a sysctl(2) variable, option is deprecated.");
377 "XFS: unknown mount option [%s].", this_char
);
383 * no recovery flag requires a read-only mount
385 if ((mp
->m_flags
& XFS_MOUNT_NORECOVERY
) &&
386 !(mp
->m_flags
& XFS_MOUNT_RDONLY
)) {
387 cmn_err(CE_WARN
, "XFS: no-recovery mounts must be read-only.");
391 if ((mp
->m_flags
& XFS_MOUNT_NOALIGN
) && (dsunit
|| dswidth
)) {
393 "XFS: sunit and swidth options incompatible with the noalign option");
397 #ifndef CONFIG_XFS_QUOTA
398 if (XFS_IS_QUOTA_RUNNING(mp
)) {
400 "XFS: quota support not available in this kernel.");
405 if ((mp
->m_qflags
& (XFS_GQUOTA_ACCT
| XFS_GQUOTA_ACTIVE
)) &&
406 (mp
->m_qflags
& (XFS_PQUOTA_ACCT
| XFS_PQUOTA_ACTIVE
))) {
408 "XFS: cannot mount with both project and group quota");
412 if ((dsunit
&& !dswidth
) || (!dsunit
&& dswidth
)) {
414 "XFS: sunit and swidth must be specified together");
418 if (dsunit
&& (dswidth
% dsunit
!= 0)) {
420 "XFS: stripe width (%d) must be a multiple of the stripe unit (%d)",
426 if (!(mp
->m_flags
& XFS_MOUNT_NOALIGN
)) {
428 * At this point the superblock has not been read
429 * in, therefore we do not know the block size.
430 * Before the mount call ends we will convert
434 mp
->m_dalign
= dsunit
;
435 mp
->m_flags
|= XFS_MOUNT_RETERR
;
439 mp
->m_swidth
= dswidth
;
442 if (mp
->m_logbufs
!= -1 &&
443 mp
->m_logbufs
!= 0 &&
444 (mp
->m_logbufs
< XLOG_MIN_ICLOGS
||
445 mp
->m_logbufs
> XLOG_MAX_ICLOGS
)) {
447 "XFS: invalid logbufs value: %d [not %d-%d]",
448 mp
->m_logbufs
, XLOG_MIN_ICLOGS
, XLOG_MAX_ICLOGS
);
449 return XFS_ERROR(EINVAL
);
451 if (mp
->m_logbsize
!= -1 &&
452 mp
->m_logbsize
!= 0 &&
453 (mp
->m_logbsize
< XLOG_MIN_RECORD_BSIZE
||
454 mp
->m_logbsize
> XLOG_MAX_RECORD_BSIZE
||
455 !is_power_of_2(mp
->m_logbsize
))) {
457 "XFS: invalid logbufsize: %d [not 16k,32k,64k,128k or 256k]",
459 return XFS_ERROR(EINVAL
);
462 mp
->m_fsname
= kstrndup(sb
->s_id
, MAXNAMELEN
, GFP_KERNEL
);
465 mp
->m_fsname_len
= strlen(mp
->m_fsname
) + 1;
468 if (iosizelog
> XFS_MAX_IO_LOG
||
469 iosizelog
< XFS_MIN_IO_LOG
) {
471 "XFS: 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_OSYNCISOSYNC
, "," MNTOPT_OSYNCISOSYNC
},
504 { XFS_MOUNT_ATTR2
, "," MNTOPT_ATTR2
},
505 { XFS_MOUNT_FILESTREAMS
, "," MNTOPT_FILESTREAM
},
506 { XFS_MOUNT_GRPID
, "," MNTOPT_GRPID
},
507 { XFS_MOUNT_DELAYLOG
, "," MNTOPT_DELAYLOG
},
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_prepare_write 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;
611 struct block_device
**bdevp
)
615 *bdevp
= open_bdev_exclusive(name
, FMODE_READ
|FMODE_WRITE
, mp
);
616 if (IS_ERR(*bdevp
)) {
617 error
= PTR_ERR(*bdevp
);
618 printk("XFS: Invalid device [%s], error=%d\n", name
, error
);
626 struct block_device
*bdev
)
629 close_bdev_exclusive(bdev
, FMODE_READ
|FMODE_WRITE
);
633 * Try to write out the superblock using barriers.
639 xfs_buf_t
*sbp
= xfs_getsb(mp
, 0);
644 XFS_BUF_UNDELAYWRITE(sbp
);
646 XFS_BUF_UNASYNC(sbp
);
647 XFS_BUF_ORDERED(sbp
);
650 error
= xfs_iowait(sbp
);
653 * Clear all the flags we set and possible error state in the
654 * buffer. We only did the write to try out whether barriers
655 * worked and shouldn't leave any traces in the superblock
659 XFS_BUF_ERROR(sbp
, 0);
660 XFS_BUF_UNORDERED(sbp
);
667 xfs_mountfs_check_barriers(xfs_mount_t
*mp
)
671 if (mp
->m_logdev_targp
!= mp
->m_ddev_targp
) {
672 xfs_fs_cmn_err(CE_NOTE
, mp
,
673 "Disabling barriers, not supported with external log device");
674 mp
->m_flags
&= ~XFS_MOUNT_BARRIER
;
678 if (xfs_readonly_buftarg(mp
->m_ddev_targp
)) {
679 xfs_fs_cmn_err(CE_NOTE
, mp
,
680 "Disabling barriers, underlying device is readonly");
681 mp
->m_flags
&= ~XFS_MOUNT_BARRIER
;
685 error
= xfs_barrier_test(mp
);
687 xfs_fs_cmn_err(CE_NOTE
, mp
,
688 "Disabling barriers, trial barrier write failed");
689 mp
->m_flags
&= ~XFS_MOUNT_BARRIER
;
695 xfs_blkdev_issue_flush(
696 xfs_buftarg_t
*buftarg
)
698 blkdev_issue_flush(buftarg
->bt_bdev
, GFP_KERNEL
, NULL
,
704 struct xfs_mount
*mp
)
706 if (mp
->m_logdev_targp
&& mp
->m_logdev_targp
!= mp
->m_ddev_targp
) {
707 struct block_device
*logdev
= mp
->m_logdev_targp
->bt_bdev
;
708 xfs_free_buftarg(mp
, mp
->m_logdev_targp
);
709 xfs_blkdev_put(logdev
);
711 if (mp
->m_rtdev_targp
) {
712 struct block_device
*rtdev
= mp
->m_rtdev_targp
->bt_bdev
;
713 xfs_free_buftarg(mp
, mp
->m_rtdev_targp
);
714 xfs_blkdev_put(rtdev
);
716 xfs_free_buftarg(mp
, mp
->m_ddev_targp
);
720 * The file system configurations are:
721 * (1) device (partition) with data and internal log
722 * (2) logical volume with data and log subvolumes.
723 * (3) logical volume with data, log, and realtime subvolumes.
725 * We only have to handle opening the log and realtime volumes here if
726 * they are present. The data subvolume has already been opened by
727 * get_sb_bdev() and is stored in sb->s_bdev.
731 struct xfs_mount
*mp
)
733 struct block_device
*ddev
= mp
->m_super
->s_bdev
;
734 struct block_device
*logdev
= NULL
, *rtdev
= NULL
;
738 * Open real time and log devices - order is important.
741 error
= xfs_blkdev_get(mp
, mp
->m_logname
, &logdev
);
747 error
= xfs_blkdev_get(mp
, mp
->m_rtname
, &rtdev
);
749 goto out_close_logdev
;
751 if (rtdev
== ddev
|| rtdev
== logdev
) {
753 "XFS: Cannot mount filesystem with identical rtdev and ddev/logdev.");
755 goto out_close_rtdev
;
760 * Setup xfs_mount buffer target pointers
763 mp
->m_ddev_targp
= xfs_alloc_buftarg(ddev
, 0, mp
->m_fsname
);
764 if (!mp
->m_ddev_targp
)
765 goto out_close_rtdev
;
768 mp
->m_rtdev_targp
= xfs_alloc_buftarg(rtdev
, 1, mp
->m_fsname
);
769 if (!mp
->m_rtdev_targp
)
770 goto out_free_ddev_targ
;
773 if (logdev
&& logdev
!= ddev
) {
774 mp
->m_logdev_targp
= xfs_alloc_buftarg(logdev
, 1, mp
->m_fsname
);
775 if (!mp
->m_logdev_targp
)
776 goto out_free_rtdev_targ
;
778 mp
->m_logdev_targp
= mp
->m_ddev_targp
;
784 if (mp
->m_rtdev_targp
)
785 xfs_free_buftarg(mp
, mp
->m_rtdev_targp
);
787 xfs_free_buftarg(mp
, mp
->m_ddev_targp
);
790 xfs_blkdev_put(rtdev
);
792 if (logdev
&& logdev
!= ddev
)
793 xfs_blkdev_put(logdev
);
799 * Setup xfs_mount buffer target pointers based on superblock
803 struct xfs_mount
*mp
)
807 error
= xfs_setsize_buftarg(mp
->m_ddev_targp
, mp
->m_sb
.sb_blocksize
,
808 mp
->m_sb
.sb_sectsize
);
812 if (mp
->m_logdev_targp
&& mp
->m_logdev_targp
!= mp
->m_ddev_targp
) {
813 unsigned int log_sector_size
= BBSIZE
;
815 if (xfs_sb_version_hassector(&mp
->m_sb
))
816 log_sector_size
= mp
->m_sb
.sb_logsectsize
;
817 error
= xfs_setsize_buftarg(mp
->m_logdev_targp
,
818 mp
->m_sb
.sb_blocksize
,
823 if (mp
->m_rtdev_targp
) {
824 error
= xfs_setsize_buftarg(mp
->m_rtdev_targp
,
825 mp
->m_sb
.sb_blocksize
,
826 mp
->m_sb
.sb_sectsize
);
835 * XFS AIL push thread support
839 struct xfs_ail
*ailp
,
840 xfs_lsn_t threshold_lsn
)
842 ailp
->xa_target
= threshold_lsn
;
843 wake_up_process(ailp
->xa_task
);
850 struct xfs_ail
*ailp
= data
;
851 xfs_lsn_t last_pushed_lsn
= 0;
852 long tout
= 0; /* milliseconds */
854 while (!kthread_should_stop()) {
855 schedule_timeout_interruptible(tout
?
856 msecs_to_jiffies(tout
) : MAX_SCHEDULE_TIMEOUT
);
861 ASSERT(ailp
->xa_mount
->m_log
);
862 if (XFS_FORCED_SHUTDOWN(ailp
->xa_mount
))
865 tout
= xfsaild_push(ailp
, &last_pushed_lsn
);
873 struct xfs_ail
*ailp
)
876 ailp
->xa_task
= kthread_run(xfsaild
, ailp
, "xfsaild/%s",
877 ailp
->xa_mount
->m_fsname
);
878 if (IS_ERR(ailp
->xa_task
))
879 return -PTR_ERR(ailp
->xa_task
);
885 struct xfs_ail
*ailp
)
887 kthread_stop(ailp
->xa_task
);
891 /* Catch misguided souls that try to use this interface on XFS */
892 STATIC
struct inode
*
894 struct super_block
*sb
)
901 * Now that the generic code is guaranteed not to be accessing
902 * the linux inode, we can reclaim the inode.
905 xfs_fs_destroy_inode(
908 struct xfs_inode
*ip
= XFS_I(inode
);
910 xfs_itrace_entry(ip
);
912 XFS_STATS_INC(vn_reclaim
);
914 /* bad inode, get out here ASAP */
915 if (is_bad_inode(inode
))
920 ASSERT(XFS_FORCED_SHUTDOWN(ip
->i_mount
) || ip
->i_delayed_blks
== 0);
923 * We should never get here with one of the reclaim flags already set.
925 ASSERT_ALWAYS(!xfs_iflags_test(ip
, XFS_IRECLAIMABLE
));
926 ASSERT_ALWAYS(!xfs_iflags_test(ip
, XFS_IRECLAIM
));
929 * We always use background reclaim here because even if the
930 * inode is clean, it still may be under IO and hence we have
931 * to take the flush lock. The background reclaim path handles
932 * this more efficiently than we can here, so simply let background
933 * reclaim tear down all inodes.
936 xfs_inode_set_reclaim_tag(ip
);
940 * Slab object creation initialisation for the XFS inode.
941 * This covers only the idempotent fields in the XFS inode;
942 * all other fields need to be initialised on allocation
943 * from the slab. This avoids the need to repeatedly intialise
944 * fields in the xfs inode that left in the initialise state
945 * when freeing the inode.
948 xfs_fs_inode_init_once(
951 struct xfs_inode
*ip
= inode
;
953 memset(ip
, 0, sizeof(struct xfs_inode
));
956 inode_init_once(VFS_I(ip
));
959 atomic_set(&ip
->i_iocount
, 0);
960 atomic_set(&ip
->i_pincount
, 0);
961 spin_lock_init(&ip
->i_flags_lock
);
962 init_waitqueue_head(&ip
->i_ipin_wait
);
964 * Because we want to use a counting completion, complete
965 * the flush completion once to allow a single access to
966 * the flush completion without blocking.
968 init_completion(&ip
->i_flush
);
969 complete(&ip
->i_flush
);
971 mrlock_init(&ip
->i_lock
, MRLOCK_ALLOW_EQUAL_PRI
|MRLOCK_BARRIER
,
972 "xfsino", ip
->i_ino
);
976 * Dirty the XFS inode when mark_inode_dirty_sync() is called so that
977 * we catch unlogged VFS level updates to the inode. Care must be taken
978 * here - the transaction code calls mark_inode_dirty_sync() to mark the
979 * VFS inode dirty in a transaction and clears the i_update_core field;
980 * it must clear the field after calling mark_inode_dirty_sync() to
981 * correctly indicate that the dirty state has been propagated into the
984 * We need the barrier() to maintain correct ordering between unlogged
985 * updates and the transaction commit code that clears the i_update_core
986 * field. This requires all updates to be completed before marking the
994 XFS_I(inode
)->i_update_core
= 1;
999 struct xfs_inode
*ip
)
1001 struct xfs_mount
*mp
= ip
->i_mount
;
1002 struct xfs_trans
*tp
;
1005 xfs_iunlock(ip
, XFS_ILOCK_SHARED
);
1006 tp
= xfs_trans_alloc(mp
, XFS_TRANS_FSYNC_TS
);
1007 error
= xfs_trans_reserve(tp
, 0, XFS_FSYNC_TS_LOG_RES(mp
), 0, 0, 0);
1010 xfs_trans_cancel(tp
, 0);
1011 /* we need to return with the lock hold shared */
1012 xfs_ilock(ip
, XFS_ILOCK_SHARED
);
1016 xfs_ilock(ip
, XFS_ILOCK_EXCL
);
1019 * Note - it's possible that we might have pushed ourselves out of the
1020 * way during trans_reserve which would flush the inode. But there's
1021 * no guarantee that the inode buffer has actually gone out yet (it's
1022 * delwri). Plus the buffer could be pinned anyway if it's part of
1023 * an inode in another recent transaction. So we play it safe and
1024 * fire off the transaction anyway.
1026 xfs_trans_ijoin(tp
, ip
, XFS_ILOCK_EXCL
);
1027 xfs_trans_ihold(tp
, ip
);
1028 xfs_trans_log_inode(tp
, ip
, XFS_ILOG_CORE
);
1029 xfs_trans_set_sync(tp
);
1030 error
= xfs_trans_commit(tp
, 0);
1031 xfs_ilock_demote(ip
, XFS_ILOCK_EXCL
);
1038 struct inode
*inode
,
1039 struct writeback_control
*wbc
)
1041 struct xfs_inode
*ip
= XFS_I(inode
);
1042 struct xfs_mount
*mp
= ip
->i_mount
;
1045 xfs_itrace_entry(ip
);
1047 if (XFS_FORCED_SHUTDOWN(mp
))
1048 return XFS_ERROR(EIO
);
1050 if (wbc
->sync_mode
== WB_SYNC_ALL
) {
1052 * Make sure the inode has hit stable storage. By using the
1053 * log and the fsync transactions we reduce the IOs we have
1054 * to do here from two (log and inode) to just the log.
1056 * Note: We still need to do a delwri write of the inode after
1057 * this to flush it to the backing buffer so that bulkstat
1058 * works properly if this is the first time the inode has been
1059 * written. Because we hold the ilock atomically over the
1060 * transaction commit and the inode flush we are guaranteed
1061 * that the inode is not pinned when it returns. If the flush
1062 * lock is already held, then the inode has already been
1063 * flushed once and we don't need to flush it again. Hence
1064 * the code will only flush the inode if it isn't already
1068 xfs_ilock(ip
, XFS_ILOCK_SHARED
);
1069 if (ip
->i_update_core
) {
1070 error
= xfs_log_inode(ip
);
1076 * We make this non-blocking if the inode is contended, return
1077 * EAGAIN to indicate to the caller that they did not succeed.
1078 * This prevents the flush path from blocking on inodes inside
1079 * another operation right now, they get caught later by xfs_sync.
1081 if (!xfs_ilock_nowait(ip
, XFS_ILOCK_SHARED
))
1085 if (xfs_ipincount(ip
) || !xfs_iflock_nowait(ip
))
1089 * Now we have the flush lock and the inode is not pinned, we can check
1090 * if the inode is really clean as we know that there are no pending
1091 * transaction completions, it is not waiting on the delayed write
1092 * queue and there is no IO in progress.
1094 if (xfs_inode_clean(ip
)) {
1099 error
= xfs_iflush(ip
, 0);
1102 xfs_iunlock(ip
, XFS_ILOCK_SHARED
);
1105 * if we failed to write out the inode then mark
1106 * it dirty again so we'll try again later.
1109 xfs_mark_inode_dirty_sync(ip
);
1115 struct inode
*inode
)
1117 xfs_inode_t
*ip
= XFS_I(inode
);
1119 xfs_itrace_entry(ip
);
1120 XFS_STATS_INC(vn_rele
);
1121 XFS_STATS_INC(vn_remove
);
1122 XFS_STATS_DEC(vn_active
);
1125 * The iolock is used by the file system to coordinate reads,
1126 * writes, and block truncates. Up to this point the lock
1127 * protected concurrent accesses by users of the inode. But
1128 * from here forward we're doing some final processing of the
1129 * inode because we're done with it, and although we reuse the
1130 * iolock for protection it is really a distinct lock class
1131 * (in the lockdep sense) from before. To keep lockdep happy
1132 * (and basically indicate what we are doing), we explicitly
1133 * re-init the iolock here.
1135 ASSERT(!rwsem_is_locked(&ip
->i_iolock
.mr_lock
));
1136 mrlock_init(&ip
->i_iolock
, MRLOCK_BARRIER
, "xfsio", ip
->i_ino
);
1143 struct xfs_mount
*mp
)
1145 kfree(mp
->m_fsname
);
1146 kfree(mp
->m_rtname
);
1147 kfree(mp
->m_logname
);
1152 struct super_block
*sb
)
1154 struct xfs_mount
*mp
= XFS_M(sb
);
1158 if (!(sb
->s_flags
& MS_RDONLY
)) {
1160 * XXX(hch): this should be SYNC_WAIT.
1162 * Or more likely not needed at all because the VFS is already
1163 * calling ->sync_fs after shutting down all filestem
1164 * operations and just before calling ->put_super.
1166 xfs_sync_data(mp
, 0);
1167 xfs_sync_attr(mp
, 0);
1171 * Blow away any referenced inode in the filestreams cache.
1172 * This can and will cause log traffic as inodes go inactive
1175 xfs_filestream_unmount(mp
);
1177 XFS_bflush(mp
->m_ddev_targp
);
1181 xfs_inode_shrinker_unregister(mp
);
1182 xfs_icsb_destroy_counters(mp
);
1183 xfs_close_devices(mp
);
1184 xfs_free_fsname(mp
);
1190 struct super_block
*sb
,
1193 struct xfs_mount
*mp
= XFS_M(sb
);
1197 * Not much we can do for the first async pass. Writing out the
1198 * superblock would be counter-productive as we are going to redirty
1199 * when writing out other data and metadata (and writing out a single
1200 * block is quite fast anyway).
1202 * Try to asynchronously kick off quota syncing at least.
1205 xfs_qm_sync(mp
, SYNC_TRYLOCK
);
1209 error
= xfs_quiesce_data(mp
);
1214 int prev_sync_seq
= mp
->m_sync_seq
;
1217 * The disk must be active because we're syncing.
1218 * We schedule xfssyncd now (now that the disk is
1219 * active) instead of later (when it might not be).
1221 wake_up_process(mp
->m_sync_task
);
1223 * We have to wait for the sync iteration to complete.
1224 * If we don't, the disk activity caused by the sync
1225 * will come after the sync is completed, and that
1226 * triggers another sync from laptop mode.
1228 wait_event(mp
->m_wait_single_sync_task
,
1229 mp
->m_sync_seq
!= prev_sync_seq
);
1237 struct dentry
*dentry
,
1238 struct kstatfs
*statp
)
1240 struct xfs_mount
*mp
= XFS_M(dentry
->d_sb
);
1241 xfs_sb_t
*sbp
= &mp
->m_sb
;
1242 struct xfs_inode
*ip
= XFS_I(dentry
->d_inode
);
1243 __uint64_t fakeinos
, id
;
1246 statp
->f_type
= XFS_SB_MAGIC
;
1247 statp
->f_namelen
= MAXNAMELEN
- 1;
1249 id
= huge_encode_dev(mp
->m_ddev_targp
->bt_dev
);
1250 statp
->f_fsid
.val
[0] = (u32
)id
;
1251 statp
->f_fsid
.val
[1] = (u32
)(id
>> 32);
1253 xfs_icsb_sync_counters(mp
, XFS_ICSB_LAZY_COUNT
);
1255 spin_lock(&mp
->m_sb_lock
);
1256 statp
->f_bsize
= sbp
->sb_blocksize
;
1257 lsize
= sbp
->sb_logstart
? sbp
->sb_logblocks
: 0;
1258 statp
->f_blocks
= sbp
->sb_dblocks
- lsize
;
1259 statp
->f_bfree
= statp
->f_bavail
=
1260 sbp
->sb_fdblocks
- XFS_ALLOC_SET_ASIDE(mp
);
1261 fakeinos
= statp
->f_bfree
<< sbp
->sb_inopblog
;
1263 MIN(sbp
->sb_icount
+ fakeinos
, (__uint64_t
)XFS_MAXINUMBER
);
1264 if (mp
->m_maxicount
)
1265 statp
->f_files
= min_t(typeof(statp
->f_files
),
1268 statp
->f_ffree
= statp
->f_files
- (sbp
->sb_icount
- sbp
->sb_ifree
);
1269 spin_unlock(&mp
->m_sb_lock
);
1271 if ((ip
->i_d
.di_flags
& XFS_DIFLAG_PROJINHERIT
) ||
1272 ((mp
->m_qflags
& (XFS_PQUOTA_ACCT
|XFS_OQUOTA_ENFD
))) ==
1273 (XFS_PQUOTA_ACCT
|XFS_OQUOTA_ENFD
))
1274 xfs_qm_statvfs(ip
, statp
);
1279 xfs_save_resvblks(struct xfs_mount
*mp
)
1281 __uint64_t resblks
= 0;
1283 mp
->m_resblks_save
= mp
->m_resblks
;
1284 xfs_reserve_blocks(mp
, &resblks
, NULL
);
1288 xfs_restore_resvblks(struct xfs_mount
*mp
)
1292 if (mp
->m_resblks_save
) {
1293 resblks
= mp
->m_resblks_save
;
1294 mp
->m_resblks_save
= 0;
1296 resblks
= xfs_default_resblks(mp
);
1298 xfs_reserve_blocks(mp
, &resblks
, NULL
);
1303 struct super_block
*sb
,
1307 struct xfs_mount
*mp
= XFS_M(sb
);
1308 substring_t args
[MAX_OPT_ARGS
];
1312 while ((p
= strsep(&options
, ",")) != NULL
) {
1318 token
= match_token(p
, tokens
, args
);
1321 mp
->m_flags
|= XFS_MOUNT_BARRIER
;
1324 * Test if barriers are actually working if we can,
1325 * else delay this check until the filesystem is
1328 if (!(mp
->m_flags
& XFS_MOUNT_RDONLY
))
1329 xfs_mountfs_check_barriers(mp
);
1332 mp
->m_flags
&= ~XFS_MOUNT_BARRIER
;
1336 * Logically we would return an error here to prevent
1337 * users from believing they might have changed
1338 * mount options using remount which can't be changed.
1340 * But unfortunately mount(8) adds all options from
1341 * mtab and fstab to the mount arguments in some cases
1342 * so we can't blindly reject options, but have to
1343 * check for each specified option if it actually
1344 * differs from the currently set option and only
1345 * reject it if that's the case.
1347 * Until that is implemented we return success for
1348 * every remount request, and silently ignore all
1349 * options that we can't actually change.
1353 "XFS: mount option \"%s\" not supported for remount\n", p
);
1362 if ((mp
->m_flags
& XFS_MOUNT_RDONLY
) && !(*flags
& MS_RDONLY
)) {
1363 mp
->m_flags
&= ~XFS_MOUNT_RDONLY
;
1364 if (mp
->m_flags
& XFS_MOUNT_BARRIER
)
1365 xfs_mountfs_check_barriers(mp
);
1368 * If this is the first remount to writeable state we
1369 * might have some superblock changes to update.
1371 if (mp
->m_update_flags
) {
1372 error
= xfs_mount_log_sb(mp
, mp
->m_update_flags
);
1375 "XFS: failed to write sb changes");
1378 mp
->m_update_flags
= 0;
1382 * Fill out the reserve pool if it is empty. Use the stashed
1383 * value if it is non-zero, otherwise go with the default.
1385 xfs_restore_resvblks(mp
);
1389 if (!(mp
->m_flags
& XFS_MOUNT_RDONLY
) && (*flags
& MS_RDONLY
)) {
1391 * After we have synced the data but before we sync the
1392 * metadata, we need to free up the reserve block pool so that
1393 * the used block count in the superblock on disk is correct at
1394 * the end of the remount. Stash the current reserve pool size
1395 * so that if we get remounted rw, we can return it to the same
1399 xfs_quiesce_data(mp
);
1400 xfs_save_resvblks(mp
);
1401 xfs_quiesce_attr(mp
);
1402 mp
->m_flags
|= XFS_MOUNT_RDONLY
;
1409 * Second stage of a freeze. The data is already frozen so we only
1410 * need to take care of the metadata. Once that's done write a dummy
1411 * record to dirty the log in case of a crash while frozen.
1415 struct super_block
*sb
)
1417 struct xfs_mount
*mp
= XFS_M(sb
);
1419 xfs_save_resvblks(mp
);
1420 xfs_quiesce_attr(mp
);
1421 return -xfs_fs_log_dummy(mp
);
1426 struct super_block
*sb
)
1428 struct xfs_mount
*mp
= XFS_M(sb
);
1430 xfs_restore_resvblks(mp
);
1435 xfs_fs_show_options(
1437 struct vfsmount
*mnt
)
1439 return -xfs_showargs(XFS_M(mnt
->mnt_sb
), m
);
1443 * This function fills in xfs_mount_t fields based on mount args.
1444 * Note: the superblock _has_ now been read in.
1448 struct xfs_mount
*mp
)
1450 int ronly
= (mp
->m_flags
& XFS_MOUNT_RDONLY
);
1452 /* Fail a mount where the logbuf is smaller than the log stripe */
1453 if (xfs_sb_version_haslogv2(&mp
->m_sb
)) {
1454 if (mp
->m_logbsize
<= 0 &&
1455 mp
->m_sb
.sb_logsunit
> XLOG_BIG_RECORD_BSIZE
) {
1456 mp
->m_logbsize
= mp
->m_sb
.sb_logsunit
;
1457 } else if (mp
->m_logbsize
> 0 &&
1458 mp
->m_logbsize
< mp
->m_sb
.sb_logsunit
) {
1460 "XFS: logbuf size must be greater than or equal to log stripe size");
1461 return XFS_ERROR(EINVAL
);
1464 /* Fail a mount if the logbuf is larger than 32K */
1465 if (mp
->m_logbsize
> XLOG_BIG_RECORD_BSIZE
) {
1467 "XFS: logbuf size for version 1 logs must be 16K or 32K");
1468 return XFS_ERROR(EINVAL
);
1473 * mkfs'ed attr2 will turn on attr2 mount unless explicitly
1474 * told by noattr2 to turn it off
1476 if (xfs_sb_version_hasattr2(&mp
->m_sb
) &&
1477 !(mp
->m_flags
& XFS_MOUNT_NOATTR2
))
1478 mp
->m_flags
|= XFS_MOUNT_ATTR2
;
1481 * prohibit r/w mounts of read-only filesystems
1483 if ((mp
->m_sb
.sb_flags
& XFS_SBF_READONLY
) && !ronly
) {
1485 "XFS: cannot mount a read-only filesystem as read-write");
1486 return XFS_ERROR(EROFS
);
1494 struct super_block
*sb
,
1499 struct xfs_mount
*mp
= NULL
;
1500 int flags
= 0, error
= ENOMEM
;
1502 mp
= kzalloc(sizeof(struct xfs_mount
), GFP_KERNEL
);
1506 spin_lock_init(&mp
->m_sb_lock
);
1507 mutex_init(&mp
->m_growlock
);
1508 atomic_set(&mp
->m_active_trans
, 0);
1509 INIT_LIST_HEAD(&mp
->m_sync_list
);
1510 spin_lock_init(&mp
->m_sync_lock
);
1511 init_waitqueue_head(&mp
->m_wait_single_sync_task
);
1516 error
= xfs_parseargs(mp
, (char *)data
);
1518 goto out_free_fsname
;
1520 sb_min_blocksize(sb
, BBSIZE
);
1521 sb
->s_xattr
= xfs_xattr_handlers
;
1522 sb
->s_export_op
= &xfs_export_operations
;
1523 #ifdef CONFIG_XFS_QUOTA
1524 sb
->s_qcop
= &xfs_quotactl_operations
;
1526 sb
->s_op
= &xfs_super_operations
;
1529 flags
|= XFS_MFSI_QUIET
;
1531 error
= xfs_open_devices(mp
);
1533 goto out_free_fsname
;
1535 if (xfs_icsb_init_counters(mp
))
1536 mp
->m_flags
|= XFS_MOUNT_NO_PERCPU_SB
;
1538 error
= xfs_readsb(mp
, flags
);
1540 goto out_destroy_counters
;
1542 error
= xfs_finish_flags(mp
);
1546 error
= xfs_setup_devices(mp
);
1550 if (mp
->m_flags
& XFS_MOUNT_BARRIER
)
1551 xfs_mountfs_check_barriers(mp
);
1553 error
= xfs_filestream_mount(mp
);
1557 error
= xfs_mountfs(mp
);
1559 goto out_filestream_unmount
;
1561 sb
->s_magic
= XFS_SB_MAGIC
;
1562 sb
->s_blocksize
= mp
->m_sb
.sb_blocksize
;
1563 sb
->s_blocksize_bits
= ffs(sb
->s_blocksize
) - 1;
1564 sb
->s_maxbytes
= xfs_max_file_offset(sb
->s_blocksize_bits
);
1565 sb
->s_time_gran
= 1;
1566 set_posix_acl_flag(sb
);
1568 root
= igrab(VFS_I(mp
->m_rootip
));
1573 if (is_bad_inode(root
)) {
1577 sb
->s_root
= d_alloc_root(root
);
1583 error
= xfs_syncd_init(mp
);
1587 xfs_inode_shrinker_register(mp
);
1591 out_filestream_unmount
:
1592 xfs_filestream_unmount(mp
);
1595 out_destroy_counters
:
1596 xfs_icsb_destroy_counters(mp
);
1597 xfs_close_devices(mp
);
1599 xfs_free_fsname(mp
);
1614 * Blow away any referenced inode in the filestreams cache.
1615 * This can and will cause log traffic as inodes go inactive
1618 xfs_filestream_unmount(mp
);
1620 XFS_bflush(mp
->m_ddev_targp
);
1628 struct file_system_type
*fs_type
,
1630 const char *dev_name
,
1632 struct vfsmount
*mnt
)
1634 return get_sb_bdev(fs_type
, flags
, dev_name
, data
, xfs_fs_fill_super
,
1638 static const struct super_operations xfs_super_operations
= {
1639 .alloc_inode
= xfs_fs_alloc_inode
,
1640 .destroy_inode
= xfs_fs_destroy_inode
,
1641 .dirty_inode
= xfs_fs_dirty_inode
,
1642 .write_inode
= xfs_fs_write_inode
,
1643 .clear_inode
= xfs_fs_clear_inode
,
1644 .put_super
= xfs_fs_put_super
,
1645 .sync_fs
= xfs_fs_sync_fs
,
1646 .freeze_fs
= xfs_fs_freeze
,
1647 .unfreeze_fs
= xfs_fs_unfreeze
,
1648 .statfs
= xfs_fs_statfs
,
1649 .remount_fs
= xfs_fs_remount
,
1650 .show_options
= xfs_fs_show_options
,
1653 static struct file_system_type xfs_fs_type
= {
1654 .owner
= THIS_MODULE
,
1656 .get_sb
= xfs_fs_get_sb
,
1657 .kill_sb
= kill_block_super
,
1658 .fs_flags
= FS_REQUIRES_DEV
,
1662 xfs_init_zones(void)
1665 xfs_ioend_zone
= kmem_zone_init(sizeof(xfs_ioend_t
), "xfs_ioend");
1666 if (!xfs_ioend_zone
)
1669 xfs_ioend_pool
= mempool_create_slab_pool(4 * MAX_BUF_PER_PAGE
,
1671 if (!xfs_ioend_pool
)
1672 goto out_destroy_ioend_zone
;
1674 xfs_log_ticket_zone
= kmem_zone_init(sizeof(xlog_ticket_t
),
1676 if (!xfs_log_ticket_zone
)
1677 goto out_destroy_ioend_pool
;
1679 xfs_bmap_free_item_zone
= kmem_zone_init(sizeof(xfs_bmap_free_item_t
),
1680 "xfs_bmap_free_item");
1681 if (!xfs_bmap_free_item_zone
)
1682 goto out_destroy_log_ticket_zone
;
1684 xfs_btree_cur_zone
= kmem_zone_init(sizeof(xfs_btree_cur_t
),
1686 if (!xfs_btree_cur_zone
)
1687 goto out_destroy_bmap_free_item_zone
;
1689 xfs_da_state_zone
= kmem_zone_init(sizeof(xfs_da_state_t
),
1691 if (!xfs_da_state_zone
)
1692 goto out_destroy_btree_cur_zone
;
1694 xfs_dabuf_zone
= kmem_zone_init(sizeof(xfs_dabuf_t
), "xfs_dabuf");
1695 if (!xfs_dabuf_zone
)
1696 goto out_destroy_da_state_zone
;
1698 xfs_ifork_zone
= kmem_zone_init(sizeof(xfs_ifork_t
), "xfs_ifork");
1699 if (!xfs_ifork_zone
)
1700 goto out_destroy_dabuf_zone
;
1702 xfs_trans_zone
= kmem_zone_init(sizeof(xfs_trans_t
), "xfs_trans");
1703 if (!xfs_trans_zone
)
1704 goto out_destroy_ifork_zone
;
1706 xfs_log_item_desc_zone
=
1707 kmem_zone_init(sizeof(struct xfs_log_item_desc
),
1708 "xfs_log_item_desc");
1709 if (!xfs_log_item_desc_zone
)
1710 goto out_destroy_trans_zone
;
1713 * The size of the zone allocated buf log item is the maximum
1714 * size possible under XFS. This wastes a little bit of memory,
1715 * but it is much faster.
1717 xfs_buf_item_zone
= kmem_zone_init((sizeof(xfs_buf_log_item_t
) +
1718 (((XFS_MAX_BLOCKSIZE
/ XFS_BLF_CHUNK
) /
1719 NBWORD
) * sizeof(int))), "xfs_buf_item");
1720 if (!xfs_buf_item_zone
)
1721 goto out_destroy_log_item_desc_zone
;
1723 xfs_efd_zone
= kmem_zone_init((sizeof(xfs_efd_log_item_t
) +
1724 ((XFS_EFD_MAX_FAST_EXTENTS
- 1) *
1725 sizeof(xfs_extent_t
))), "xfs_efd_item");
1727 goto out_destroy_buf_item_zone
;
1729 xfs_efi_zone
= kmem_zone_init((sizeof(xfs_efi_log_item_t
) +
1730 ((XFS_EFI_MAX_FAST_EXTENTS
- 1) *
1731 sizeof(xfs_extent_t
))), "xfs_efi_item");
1733 goto out_destroy_efd_zone
;
1736 kmem_zone_init_flags(sizeof(xfs_inode_t
), "xfs_inode",
1737 KM_ZONE_HWALIGN
| KM_ZONE_RECLAIM
| KM_ZONE_SPREAD
,
1738 xfs_fs_inode_init_once
);
1739 if (!xfs_inode_zone
)
1740 goto out_destroy_efi_zone
;
1743 kmem_zone_init_flags(sizeof(xfs_inode_log_item_t
), "xfs_ili",
1744 KM_ZONE_SPREAD
, NULL
);
1746 goto out_destroy_inode_zone
;
1750 out_destroy_inode_zone
:
1751 kmem_zone_destroy(xfs_inode_zone
);
1752 out_destroy_efi_zone
:
1753 kmem_zone_destroy(xfs_efi_zone
);
1754 out_destroy_efd_zone
:
1755 kmem_zone_destroy(xfs_efd_zone
);
1756 out_destroy_buf_item_zone
:
1757 kmem_zone_destroy(xfs_buf_item_zone
);
1758 out_destroy_log_item_desc_zone
:
1759 kmem_zone_destroy(xfs_log_item_desc_zone
);
1760 out_destroy_trans_zone
:
1761 kmem_zone_destroy(xfs_trans_zone
);
1762 out_destroy_ifork_zone
:
1763 kmem_zone_destroy(xfs_ifork_zone
);
1764 out_destroy_dabuf_zone
:
1765 kmem_zone_destroy(xfs_dabuf_zone
);
1766 out_destroy_da_state_zone
:
1767 kmem_zone_destroy(xfs_da_state_zone
);
1768 out_destroy_btree_cur_zone
:
1769 kmem_zone_destroy(xfs_btree_cur_zone
);
1770 out_destroy_bmap_free_item_zone
:
1771 kmem_zone_destroy(xfs_bmap_free_item_zone
);
1772 out_destroy_log_ticket_zone
:
1773 kmem_zone_destroy(xfs_log_ticket_zone
);
1774 out_destroy_ioend_pool
:
1775 mempool_destroy(xfs_ioend_pool
);
1776 out_destroy_ioend_zone
:
1777 kmem_zone_destroy(xfs_ioend_zone
);
1783 xfs_destroy_zones(void)
1785 kmem_zone_destroy(xfs_ili_zone
);
1786 kmem_zone_destroy(xfs_inode_zone
);
1787 kmem_zone_destroy(xfs_efi_zone
);
1788 kmem_zone_destroy(xfs_efd_zone
);
1789 kmem_zone_destroy(xfs_buf_item_zone
);
1790 kmem_zone_destroy(xfs_log_item_desc_zone
);
1791 kmem_zone_destroy(xfs_trans_zone
);
1792 kmem_zone_destroy(xfs_ifork_zone
);
1793 kmem_zone_destroy(xfs_dabuf_zone
);
1794 kmem_zone_destroy(xfs_da_state_zone
);
1795 kmem_zone_destroy(xfs_btree_cur_zone
);
1796 kmem_zone_destroy(xfs_bmap_free_item_zone
);
1797 kmem_zone_destroy(xfs_log_ticket_zone
);
1798 mempool_destroy(xfs_ioend_pool
);
1799 kmem_zone_destroy(xfs_ioend_zone
);
1808 printk(KERN_INFO XFS_VERSION_STRING
" with "
1809 XFS_BUILD_OPTIONS
" enabled\n");
1814 error
= xfs_init_zones();
1818 error
= xfs_mru_cache_init();
1820 goto out_destroy_zones
;
1822 error
= xfs_filestream_init();
1824 goto out_mru_cache_uninit
;
1826 error
= xfs_buf_init();
1828 goto out_filestream_uninit
;
1830 error
= xfs_init_procfs();
1832 goto out_buf_terminate
;
1834 error
= xfs_sysctl_register();
1836 goto out_cleanup_procfs
;
1840 error
= register_filesystem(&xfs_fs_type
);
1842 goto out_sysctl_unregister
;
1845 out_sysctl_unregister
:
1846 xfs_sysctl_unregister();
1848 xfs_cleanup_procfs();
1850 xfs_buf_terminate();
1851 out_filestream_uninit
:
1852 xfs_filestream_uninit();
1853 out_mru_cache_uninit
:
1854 xfs_mru_cache_uninit();
1856 xfs_destroy_zones();
1865 unregister_filesystem(&xfs_fs_type
);
1866 xfs_sysctl_unregister();
1867 xfs_cleanup_procfs();
1868 xfs_buf_terminate();
1869 xfs_filestream_uninit();
1870 xfs_mru_cache_uninit();
1871 xfs_destroy_zones();
1874 module_init(init_xfs_fs
);
1875 module_exit(exit_xfs_fs
);
1877 MODULE_AUTHOR("Silicon Graphics, Inc.");
1878 MODULE_DESCRIPTION(XFS_VERSION_STRING
" with " XFS_BUILD_OPTIONS
" enabled");
1879 MODULE_LICENSE("GPL");