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_log_priv.h"
48 #include "xfs_trans_priv.h"
49 #include "xfs_filestream.h"
50 #include "xfs_da_btree.h"
51 #include "xfs_extfree_item.h"
52 #include "xfs_mru_cache.h"
53 #include "xfs_inode_item.h"
55 #include "xfs_trace.h"
57 #include <linux/namei.h>
58 #include <linux/init.h>
59 #include <linux/slab.h>
60 #include <linux/mount.h>
61 #include <linux/mempool.h>
62 #include <linux/writeback.h>
63 #include <linux/kthread.h>
64 #include <linux/freezer.h>
65 #include <linux/parser.h>
67 static const struct super_operations xfs_super_operations
;
68 static kmem_zone_t
*xfs_ioend_zone
;
69 mempool_t
*xfs_ioend_pool
;
71 #define MNTOPT_LOGBUFS "logbufs" /* number of XFS log buffers */
72 #define MNTOPT_LOGBSIZE "logbsize" /* size of XFS log buffers */
73 #define MNTOPT_LOGDEV "logdev" /* log device */
74 #define MNTOPT_RTDEV "rtdev" /* realtime I/O device */
75 #define MNTOPT_BIOSIZE "biosize" /* log2 of preferred buffered io size */
76 #define MNTOPT_WSYNC "wsync" /* safe-mode nfs compatible mount */
77 #define MNTOPT_NOALIGN "noalign" /* turn off stripe alignment */
78 #define MNTOPT_SWALLOC "swalloc" /* turn on stripe width allocation */
79 #define MNTOPT_SUNIT "sunit" /* data volume stripe unit */
80 #define MNTOPT_SWIDTH "swidth" /* data volume stripe width */
81 #define MNTOPT_NOUUID "nouuid" /* ignore filesystem UUID */
82 #define MNTOPT_MTPT "mtpt" /* filesystem mount point */
83 #define MNTOPT_GRPID "grpid" /* group-ID from parent directory */
84 #define MNTOPT_NOGRPID "nogrpid" /* group-ID from current process */
85 #define MNTOPT_BSDGROUPS "bsdgroups" /* group-ID from parent directory */
86 #define MNTOPT_SYSVGROUPS "sysvgroups" /* group-ID from current process */
87 #define MNTOPT_ALLOCSIZE "allocsize" /* preferred allocation size */
88 #define MNTOPT_NORECOVERY "norecovery" /* don't run XFS recovery */
89 #define MNTOPT_BARRIER "barrier" /* use writer barriers for log write and
90 * unwritten extent conversion */
91 #define MNTOPT_NOBARRIER "nobarrier" /* .. disable */
92 #define MNTOPT_64BITINODE "inode64" /* inodes can be allocated anywhere */
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.
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 * set up the mount name first so all the errors will refer to the
181 mp
->m_fsname
= kstrndup(sb
->s_id
, MAXNAMELEN
, GFP_KERNEL
);
184 mp
->m_fsname_len
= strlen(mp
->m_fsname
) + 1;
187 * Copy binary VFS mount flags we are interested in.
189 if (sb
->s_flags
& MS_RDONLY
)
190 mp
->m_flags
|= XFS_MOUNT_RDONLY
;
191 if (sb
->s_flags
& MS_DIRSYNC
)
192 mp
->m_flags
|= XFS_MOUNT_DIRSYNC
;
193 if (sb
->s_flags
& MS_SYNCHRONOUS
)
194 mp
->m_flags
|= XFS_MOUNT_WSYNC
;
197 * Set some default flags that could be cleared by the mount option
200 mp
->m_flags
|= XFS_MOUNT_BARRIER
;
201 mp
->m_flags
|= XFS_MOUNT_COMPAT_IOSIZE
;
202 mp
->m_flags
|= XFS_MOUNT_SMALL_INUMS
;
203 mp
->m_flags
|= XFS_MOUNT_DELAYLOG
;
206 * These can be overridden by the mount option parsing.
214 while ((this_char
= strsep(&options
, ",")) != NULL
) {
217 if ((value
= strchr(this_char
, '=')) != NULL
)
220 if (!strcmp(this_char
, MNTOPT_LOGBUFS
)) {
221 if (!value
|| !*value
) {
222 xfs_warn(mp
, "%s option requires an argument",
226 mp
->m_logbufs
= simple_strtoul(value
, &eov
, 10);
227 } else if (!strcmp(this_char
, MNTOPT_LOGBSIZE
)) {
228 if (!value
|| !*value
) {
229 xfs_warn(mp
, "%s option requires an argument",
233 mp
->m_logbsize
= suffix_strtoul(value
, &eov
, 10);
234 } else if (!strcmp(this_char
, MNTOPT_LOGDEV
)) {
235 if (!value
|| !*value
) {
236 xfs_warn(mp
, "%s option requires an argument",
240 mp
->m_logname
= kstrndup(value
, MAXNAMELEN
, GFP_KERNEL
);
243 } else if (!strcmp(this_char
, MNTOPT_MTPT
)) {
244 xfs_warn(mp
, "%s option not allowed on this system",
247 } else if (!strcmp(this_char
, MNTOPT_RTDEV
)) {
248 if (!value
|| !*value
) {
249 xfs_warn(mp
, "%s option requires an argument",
253 mp
->m_rtname
= kstrndup(value
, MAXNAMELEN
, GFP_KERNEL
);
256 } else if (!strcmp(this_char
, MNTOPT_BIOSIZE
)) {
257 if (!value
|| !*value
) {
258 xfs_warn(mp
, "%s option requires an argument",
262 iosize
= simple_strtoul(value
, &eov
, 10);
263 iosizelog
= ffs(iosize
) - 1;
264 } else if (!strcmp(this_char
, MNTOPT_ALLOCSIZE
)) {
265 if (!value
|| !*value
) {
266 xfs_warn(mp
, "%s option requires an argument",
270 iosize
= suffix_strtoul(value
, &eov
, 10);
271 iosizelog
= ffs(iosize
) - 1;
272 } else if (!strcmp(this_char
, MNTOPT_GRPID
) ||
273 !strcmp(this_char
, MNTOPT_BSDGROUPS
)) {
274 mp
->m_flags
|= XFS_MOUNT_GRPID
;
275 } else if (!strcmp(this_char
, MNTOPT_NOGRPID
) ||
276 !strcmp(this_char
, MNTOPT_SYSVGROUPS
)) {
277 mp
->m_flags
&= ~XFS_MOUNT_GRPID
;
278 } else if (!strcmp(this_char
, MNTOPT_WSYNC
)) {
279 mp
->m_flags
|= XFS_MOUNT_WSYNC
;
280 } else if (!strcmp(this_char
, MNTOPT_NORECOVERY
)) {
281 mp
->m_flags
|= XFS_MOUNT_NORECOVERY
;
282 } else if (!strcmp(this_char
, MNTOPT_NOALIGN
)) {
283 mp
->m_flags
|= XFS_MOUNT_NOALIGN
;
284 } else if (!strcmp(this_char
, MNTOPT_SWALLOC
)) {
285 mp
->m_flags
|= XFS_MOUNT_SWALLOC
;
286 } else if (!strcmp(this_char
, MNTOPT_SUNIT
)) {
287 if (!value
|| !*value
) {
288 xfs_warn(mp
, "%s option requires an argument",
292 dsunit
= simple_strtoul(value
, &eov
, 10);
293 } else if (!strcmp(this_char
, MNTOPT_SWIDTH
)) {
294 if (!value
|| !*value
) {
295 xfs_warn(mp
, "%s option requires an argument",
299 dswidth
= simple_strtoul(value
, &eov
, 10);
300 } else if (!strcmp(this_char
, MNTOPT_64BITINODE
)) {
301 mp
->m_flags
&= ~XFS_MOUNT_SMALL_INUMS
;
303 xfs_warn(mp
, "%s option not allowed on this system",
307 } else if (!strcmp(this_char
, MNTOPT_NOUUID
)) {
308 mp
->m_flags
|= XFS_MOUNT_NOUUID
;
309 } else if (!strcmp(this_char
, MNTOPT_BARRIER
)) {
310 mp
->m_flags
|= XFS_MOUNT_BARRIER
;
311 } else if (!strcmp(this_char
, MNTOPT_NOBARRIER
)) {
312 mp
->m_flags
&= ~XFS_MOUNT_BARRIER
;
313 } else if (!strcmp(this_char
, MNTOPT_IKEEP
)) {
314 mp
->m_flags
|= XFS_MOUNT_IKEEP
;
315 } else if (!strcmp(this_char
, MNTOPT_NOIKEEP
)) {
316 mp
->m_flags
&= ~XFS_MOUNT_IKEEP
;
317 } else if (!strcmp(this_char
, MNTOPT_LARGEIO
)) {
318 mp
->m_flags
&= ~XFS_MOUNT_COMPAT_IOSIZE
;
319 } else if (!strcmp(this_char
, MNTOPT_NOLARGEIO
)) {
320 mp
->m_flags
|= XFS_MOUNT_COMPAT_IOSIZE
;
321 } else if (!strcmp(this_char
, MNTOPT_ATTR2
)) {
322 mp
->m_flags
|= XFS_MOUNT_ATTR2
;
323 } else if (!strcmp(this_char
, MNTOPT_NOATTR2
)) {
324 mp
->m_flags
&= ~XFS_MOUNT_ATTR2
;
325 mp
->m_flags
|= XFS_MOUNT_NOATTR2
;
326 } else if (!strcmp(this_char
, MNTOPT_FILESTREAM
)) {
327 mp
->m_flags
|= XFS_MOUNT_FILESTREAMS
;
328 } else if (!strcmp(this_char
, MNTOPT_NOQUOTA
)) {
329 mp
->m_qflags
&= ~(XFS_UQUOTA_ACCT
| XFS_UQUOTA_ACTIVE
|
330 XFS_GQUOTA_ACCT
| XFS_GQUOTA_ACTIVE
|
331 XFS_PQUOTA_ACCT
| XFS_PQUOTA_ACTIVE
|
332 XFS_UQUOTA_ENFD
| XFS_OQUOTA_ENFD
);
333 } else if (!strcmp(this_char
, MNTOPT_QUOTA
) ||
334 !strcmp(this_char
, MNTOPT_UQUOTA
) ||
335 !strcmp(this_char
, MNTOPT_USRQUOTA
)) {
336 mp
->m_qflags
|= (XFS_UQUOTA_ACCT
| XFS_UQUOTA_ACTIVE
|
338 } else if (!strcmp(this_char
, MNTOPT_QUOTANOENF
) ||
339 !strcmp(this_char
, MNTOPT_UQUOTANOENF
)) {
340 mp
->m_qflags
|= (XFS_UQUOTA_ACCT
| XFS_UQUOTA_ACTIVE
);
341 mp
->m_qflags
&= ~XFS_UQUOTA_ENFD
;
342 } else if (!strcmp(this_char
, MNTOPT_PQUOTA
) ||
343 !strcmp(this_char
, MNTOPT_PRJQUOTA
)) {
344 mp
->m_qflags
|= (XFS_PQUOTA_ACCT
| XFS_PQUOTA_ACTIVE
|
346 } else if (!strcmp(this_char
, MNTOPT_PQUOTANOENF
)) {
347 mp
->m_qflags
|= (XFS_PQUOTA_ACCT
| XFS_PQUOTA_ACTIVE
);
348 mp
->m_qflags
&= ~XFS_OQUOTA_ENFD
;
349 } else if (!strcmp(this_char
, MNTOPT_GQUOTA
) ||
350 !strcmp(this_char
, MNTOPT_GRPQUOTA
)) {
351 mp
->m_qflags
|= (XFS_GQUOTA_ACCT
| XFS_GQUOTA_ACTIVE
|
353 } else if (!strcmp(this_char
, MNTOPT_GQUOTANOENF
)) {
354 mp
->m_qflags
|= (XFS_GQUOTA_ACCT
| XFS_GQUOTA_ACTIVE
);
355 mp
->m_qflags
&= ~XFS_OQUOTA_ENFD
;
356 } else if (!strcmp(this_char
, MNTOPT_DELAYLOG
)) {
357 mp
->m_flags
|= XFS_MOUNT_DELAYLOG
;
358 } else if (!strcmp(this_char
, MNTOPT_NODELAYLOG
)) {
359 mp
->m_flags
&= ~XFS_MOUNT_DELAYLOG
;
360 } else if (!strcmp(this_char
, MNTOPT_DISCARD
)) {
361 mp
->m_flags
|= XFS_MOUNT_DISCARD
;
362 } else if (!strcmp(this_char
, MNTOPT_NODISCARD
)) {
363 mp
->m_flags
&= ~XFS_MOUNT_DISCARD
;
364 } else if (!strcmp(this_char
, "ihashsize")) {
366 "ihashsize no longer used, option is deprecated.");
367 } else if (!strcmp(this_char
, "osyncisdsync")) {
369 "osyncisdsync has no effect, option is deprecated.");
370 } else if (!strcmp(this_char
, "osyncisosync")) {
372 "osyncisosync has no effect, option is deprecated.");
373 } else if (!strcmp(this_char
, "irixsgid")) {
375 "irixsgid is now a sysctl(2) variable, option is deprecated.");
377 xfs_warn(mp
, "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 xfs_warn(mp
, "no-recovery mounts must be read-only.");
391 if ((mp
->m_flags
& XFS_MOUNT_NOALIGN
) && (dsunit
|| dswidth
)) {
393 "sunit and swidth options incompatible with the noalign option");
397 if ((mp
->m_flags
& XFS_MOUNT_DISCARD
) &&
398 !(mp
->m_flags
& XFS_MOUNT_DELAYLOG
)) {
400 "the discard option is incompatible with the nodelaylog option");
404 #ifndef CONFIG_XFS_QUOTA
405 if (XFS_IS_QUOTA_RUNNING(mp
)) {
406 xfs_warn(mp
, "quota support not available in this kernel.");
411 if ((mp
->m_qflags
& (XFS_GQUOTA_ACCT
| XFS_GQUOTA_ACTIVE
)) &&
412 (mp
->m_qflags
& (XFS_PQUOTA_ACCT
| XFS_PQUOTA_ACTIVE
))) {
413 xfs_warn(mp
, "cannot mount with both project and group quota");
417 if ((dsunit
&& !dswidth
) || (!dsunit
&& dswidth
)) {
418 xfs_warn(mp
, "sunit and swidth must be specified together");
422 if (dsunit
&& (dswidth
% dsunit
!= 0)) {
424 "stripe width (%d) must be a multiple of the stripe unit (%d)",
430 if (!(mp
->m_flags
& XFS_MOUNT_NOALIGN
)) {
432 * At this point the superblock has not been read
433 * in, therefore we do not know the block size.
434 * Before the mount call ends we will convert
438 mp
->m_dalign
= dsunit
;
439 mp
->m_flags
|= XFS_MOUNT_RETERR
;
443 mp
->m_swidth
= dswidth
;
446 if (mp
->m_logbufs
!= -1 &&
447 mp
->m_logbufs
!= 0 &&
448 (mp
->m_logbufs
< XLOG_MIN_ICLOGS
||
449 mp
->m_logbufs
> XLOG_MAX_ICLOGS
)) {
450 xfs_warn(mp
, "invalid logbufs value: %d [not %d-%d]",
451 mp
->m_logbufs
, XLOG_MIN_ICLOGS
, XLOG_MAX_ICLOGS
);
452 return XFS_ERROR(EINVAL
);
454 if (mp
->m_logbsize
!= -1 &&
455 mp
->m_logbsize
!= 0 &&
456 (mp
->m_logbsize
< XLOG_MIN_RECORD_BSIZE
||
457 mp
->m_logbsize
> XLOG_MAX_RECORD_BSIZE
||
458 !is_power_of_2(mp
->m_logbsize
))) {
460 "invalid logbufsize: %d [not 16k,32k,64k,128k or 256k]",
462 return XFS_ERROR(EINVAL
);
466 if (iosizelog
> XFS_MAX_IO_LOG
||
467 iosizelog
< XFS_MIN_IO_LOG
) {
468 xfs_warn(mp
, "invalid log iosize: %d [not %d-%d]",
469 iosizelog
, XFS_MIN_IO_LOG
,
471 return XFS_ERROR(EINVAL
);
474 mp
->m_flags
|= XFS_MOUNT_DFLT_IOSIZE
;
475 mp
->m_readio_log
= iosizelog
;
476 mp
->m_writeio_log
= iosizelog
;
482 struct proc_xfs_info
{
489 struct xfs_mount
*mp
,
492 static struct proc_xfs_info xfs_info_set
[] = {
493 /* the few simple ones we can get from the mount struct */
494 { XFS_MOUNT_IKEEP
, "," MNTOPT_IKEEP
},
495 { XFS_MOUNT_WSYNC
, "," MNTOPT_WSYNC
},
496 { XFS_MOUNT_NOALIGN
, "," MNTOPT_NOALIGN
},
497 { XFS_MOUNT_SWALLOC
, "," MNTOPT_SWALLOC
},
498 { XFS_MOUNT_NOUUID
, "," MNTOPT_NOUUID
},
499 { XFS_MOUNT_NORECOVERY
, "," MNTOPT_NORECOVERY
},
500 { XFS_MOUNT_ATTR2
, "," MNTOPT_ATTR2
},
501 { XFS_MOUNT_FILESTREAMS
, "," MNTOPT_FILESTREAM
},
502 { XFS_MOUNT_GRPID
, "," MNTOPT_GRPID
},
503 { XFS_MOUNT_DELAYLOG
, "," MNTOPT_DELAYLOG
},
504 { XFS_MOUNT_DISCARD
, "," MNTOPT_DISCARD
},
507 static struct proc_xfs_info xfs_info_unset
[] = {
508 /* the few simple ones we can get from the mount struct */
509 { XFS_MOUNT_COMPAT_IOSIZE
, "," MNTOPT_LARGEIO
},
510 { XFS_MOUNT_BARRIER
, "," MNTOPT_NOBARRIER
},
511 { XFS_MOUNT_SMALL_INUMS
, "," MNTOPT_64BITINODE
},
514 struct proc_xfs_info
*xfs_infop
;
516 for (xfs_infop
= xfs_info_set
; xfs_infop
->flag
; xfs_infop
++) {
517 if (mp
->m_flags
& xfs_infop
->flag
)
518 seq_puts(m
, xfs_infop
->str
);
520 for (xfs_infop
= xfs_info_unset
; xfs_infop
->flag
; xfs_infop
++) {
521 if (!(mp
->m_flags
& xfs_infop
->flag
))
522 seq_puts(m
, xfs_infop
->str
);
525 if (mp
->m_flags
& XFS_MOUNT_DFLT_IOSIZE
)
526 seq_printf(m
, "," MNTOPT_ALLOCSIZE
"=%dk",
527 (int)(1 << mp
->m_writeio_log
) >> 10);
529 if (mp
->m_logbufs
> 0)
530 seq_printf(m
, "," MNTOPT_LOGBUFS
"=%d", mp
->m_logbufs
);
531 if (mp
->m_logbsize
> 0)
532 seq_printf(m
, "," MNTOPT_LOGBSIZE
"=%dk", mp
->m_logbsize
>> 10);
535 seq_printf(m
, "," MNTOPT_LOGDEV
"=%s", mp
->m_logname
);
537 seq_printf(m
, "," MNTOPT_RTDEV
"=%s", mp
->m_rtname
);
539 if (mp
->m_dalign
> 0)
540 seq_printf(m
, "," MNTOPT_SUNIT
"=%d",
541 (int)XFS_FSB_TO_BB(mp
, mp
->m_dalign
));
542 if (mp
->m_swidth
> 0)
543 seq_printf(m
, "," MNTOPT_SWIDTH
"=%d",
544 (int)XFS_FSB_TO_BB(mp
, mp
->m_swidth
));
546 if (mp
->m_qflags
& (XFS_UQUOTA_ACCT
|XFS_UQUOTA_ENFD
))
547 seq_puts(m
, "," MNTOPT_USRQUOTA
);
548 else if (mp
->m_qflags
& XFS_UQUOTA_ACCT
)
549 seq_puts(m
, "," MNTOPT_UQUOTANOENF
);
551 /* Either project or group quotas can be active, not both */
553 if (mp
->m_qflags
& XFS_PQUOTA_ACCT
) {
554 if (mp
->m_qflags
& XFS_OQUOTA_ENFD
)
555 seq_puts(m
, "," MNTOPT_PRJQUOTA
);
557 seq_puts(m
, "," MNTOPT_PQUOTANOENF
);
558 } else if (mp
->m_qflags
& XFS_GQUOTA_ACCT
) {
559 if (mp
->m_qflags
& XFS_OQUOTA_ENFD
)
560 seq_puts(m
, "," MNTOPT_GRPQUOTA
);
562 seq_puts(m
, "," MNTOPT_GQUOTANOENF
);
565 if (!(mp
->m_qflags
& XFS_ALL_QUOTA_ACCT
))
566 seq_puts(m
, "," MNTOPT_NOQUOTA
);
572 unsigned int blockshift
)
574 unsigned int pagefactor
= 1;
575 unsigned int bitshift
= BITS_PER_LONG
- 1;
577 /* Figure out maximum filesize, on Linux this can depend on
578 * the filesystem blocksize (on 32 bit platforms).
579 * __block_write_begin does this in an [unsigned] long...
580 * page->index << (PAGE_CACHE_SHIFT - bbits)
581 * So, for page sized blocks (4K on 32 bit platforms),
582 * this wraps at around 8Tb (hence MAX_LFS_FILESIZE which is
583 * (((u64)PAGE_CACHE_SIZE << (BITS_PER_LONG-1))-1)
584 * but for smaller blocksizes it is less (bbits = log2 bsize).
585 * Note1: get_block_t takes a long (implicit cast from above)
586 * Note2: The Large Block Device (LBD and HAVE_SECTOR_T) patch
587 * can optionally convert the [unsigned] long from above into
588 * an [unsigned] long long.
591 #if BITS_PER_LONG == 32
592 # if defined(CONFIG_LBDAF)
593 ASSERT(sizeof(sector_t
) == 8);
594 pagefactor
= PAGE_CACHE_SIZE
;
595 bitshift
= BITS_PER_LONG
;
597 pagefactor
= PAGE_CACHE_SIZE
>> (PAGE_CACHE_SHIFT
- blockshift
);
601 return (((__uint64_t
)pagefactor
) << bitshift
) - 1;
608 struct block_device
**bdevp
)
612 *bdevp
= blkdev_get_by_path(name
, FMODE_READ
|FMODE_WRITE
|FMODE_EXCL
,
614 if (IS_ERR(*bdevp
)) {
615 error
= PTR_ERR(*bdevp
);
616 xfs_warn(mp
, "Invalid device [%s], error=%d\n", name
, error
);
624 struct block_device
*bdev
)
627 blkdev_put(bdev
, FMODE_READ
|FMODE_WRITE
|FMODE_EXCL
);
631 * Try to write out the superblock using barriers.
637 xfs_buf_t
*sbp
= xfs_getsb(mp
, 0);
642 XFS_BUF_UNDELAYWRITE(sbp
);
644 XFS_BUF_UNASYNC(sbp
);
645 XFS_BUF_ORDERED(sbp
);
648 error
= xfs_buf_iowait(sbp
);
651 * Clear all the flags we set and possible error state in the
652 * buffer. We only did the write to try out whether barriers
653 * worked and shouldn't leave any traces in the superblock
657 XFS_BUF_ERROR(sbp
, 0);
658 XFS_BUF_UNORDERED(sbp
);
665 xfs_mountfs_check_barriers(xfs_mount_t
*mp
)
669 if (mp
->m_logdev_targp
!= mp
->m_ddev_targp
) {
671 "Disabling barriers, not supported with external log device");
672 mp
->m_flags
&= ~XFS_MOUNT_BARRIER
;
676 if (xfs_readonly_buftarg(mp
->m_ddev_targp
)) {
678 "Disabling barriers, underlying device is readonly");
679 mp
->m_flags
&= ~XFS_MOUNT_BARRIER
;
683 error
= xfs_barrier_test(mp
);
686 "Disabling barriers, trial barrier write failed");
687 mp
->m_flags
&= ~XFS_MOUNT_BARRIER
;
693 xfs_blkdev_issue_flush(
694 xfs_buftarg_t
*buftarg
)
696 blkdev_issue_flush(buftarg
->bt_bdev
, GFP_KERNEL
, NULL
);
701 struct xfs_mount
*mp
)
703 if (mp
->m_logdev_targp
&& mp
->m_logdev_targp
!= mp
->m_ddev_targp
) {
704 struct block_device
*logdev
= mp
->m_logdev_targp
->bt_bdev
;
705 xfs_free_buftarg(mp
, mp
->m_logdev_targp
);
706 xfs_blkdev_put(logdev
);
708 if (mp
->m_rtdev_targp
) {
709 struct block_device
*rtdev
= mp
->m_rtdev_targp
->bt_bdev
;
710 xfs_free_buftarg(mp
, mp
->m_rtdev_targp
);
711 xfs_blkdev_put(rtdev
);
713 xfs_free_buftarg(mp
, mp
->m_ddev_targp
);
717 * The file system configurations are:
718 * (1) device (partition) with data and internal log
719 * (2) logical volume with data and log subvolumes.
720 * (3) logical volume with data, log, and realtime subvolumes.
722 * We only have to handle opening the log and realtime volumes here if
723 * they are present. The data subvolume has already been opened by
724 * get_sb_bdev() and is stored in sb->s_bdev.
728 struct xfs_mount
*mp
)
730 struct block_device
*ddev
= mp
->m_super
->s_bdev
;
731 struct block_device
*logdev
= NULL
, *rtdev
= NULL
;
735 * Open real time and log devices - order is important.
738 error
= xfs_blkdev_get(mp
, mp
->m_logname
, &logdev
);
744 error
= xfs_blkdev_get(mp
, mp
->m_rtname
, &rtdev
);
746 goto out_close_logdev
;
748 if (rtdev
== ddev
|| rtdev
== logdev
) {
750 "Cannot mount filesystem with identical rtdev and ddev/logdev.");
752 goto out_close_rtdev
;
757 * Setup xfs_mount buffer target pointers
760 mp
->m_ddev_targp
= xfs_alloc_buftarg(mp
, ddev
, 0, mp
->m_fsname
);
761 if (!mp
->m_ddev_targp
)
762 goto out_close_rtdev
;
765 mp
->m_rtdev_targp
= xfs_alloc_buftarg(mp
, rtdev
, 1,
767 if (!mp
->m_rtdev_targp
)
768 goto out_free_ddev_targ
;
771 if (logdev
&& logdev
!= ddev
) {
772 mp
->m_logdev_targp
= xfs_alloc_buftarg(mp
, logdev
, 1,
774 if (!mp
->m_logdev_targp
)
775 goto out_free_rtdev_targ
;
777 mp
->m_logdev_targp
= mp
->m_ddev_targp
;
783 if (mp
->m_rtdev_targp
)
784 xfs_free_buftarg(mp
, mp
->m_rtdev_targp
);
786 xfs_free_buftarg(mp
, mp
->m_ddev_targp
);
789 xfs_blkdev_put(rtdev
);
791 if (logdev
&& logdev
!= ddev
)
792 xfs_blkdev_put(logdev
);
798 * Setup xfs_mount buffer target pointers based on superblock
802 struct xfs_mount
*mp
)
806 error
= xfs_setsize_buftarg(mp
->m_ddev_targp
, mp
->m_sb
.sb_blocksize
,
807 mp
->m_sb
.sb_sectsize
);
811 if (mp
->m_logdev_targp
&& mp
->m_logdev_targp
!= mp
->m_ddev_targp
) {
812 unsigned int log_sector_size
= BBSIZE
;
814 if (xfs_sb_version_hassector(&mp
->m_sb
))
815 log_sector_size
= mp
->m_sb
.sb_logsectsize
;
816 error
= xfs_setsize_buftarg(mp
->m_logdev_targp
,
817 mp
->m_sb
.sb_blocksize
,
822 if (mp
->m_rtdev_targp
) {
823 error
= xfs_setsize_buftarg(mp
->m_rtdev_targp
,
824 mp
->m_sb
.sb_blocksize
,
825 mp
->m_sb
.sb_sectsize
);
833 /* Catch misguided souls that try to use this interface on XFS */
834 STATIC
struct inode
*
836 struct super_block
*sb
)
843 * Now that the generic code is guaranteed not to be accessing
844 * the linux inode, we can reclaim the inode.
847 xfs_fs_destroy_inode(
850 struct xfs_inode
*ip
= XFS_I(inode
);
852 trace_xfs_destroy_inode(ip
);
854 XFS_STATS_INC(vn_reclaim
);
856 /* bad inode, get out here ASAP */
857 if (is_bad_inode(inode
))
862 ASSERT(XFS_FORCED_SHUTDOWN(ip
->i_mount
) || ip
->i_delayed_blks
== 0);
865 * We should never get here with one of the reclaim flags already set.
867 ASSERT_ALWAYS(!xfs_iflags_test(ip
, XFS_IRECLAIMABLE
));
868 ASSERT_ALWAYS(!xfs_iflags_test(ip
, XFS_IRECLAIM
));
871 * We always use background reclaim here because even if the
872 * inode is clean, it still may be under IO and hence we have
873 * to take the flush lock. The background reclaim path handles
874 * this more efficiently than we can here, so simply let background
875 * reclaim tear down all inodes.
878 xfs_inode_set_reclaim_tag(ip
);
882 * Slab object creation initialisation for the XFS inode.
883 * This covers only the idempotent fields in the XFS inode;
884 * all other fields need to be initialised on allocation
885 * from the slab. This avoids the need to repeatedly initialise
886 * fields in the xfs inode that left in the initialise state
887 * when freeing the inode.
890 xfs_fs_inode_init_once(
893 struct xfs_inode
*ip
= inode
;
895 memset(ip
, 0, sizeof(struct xfs_inode
));
898 inode_init_once(VFS_I(ip
));
901 atomic_set(&ip
->i_iocount
, 0);
902 atomic_set(&ip
->i_pincount
, 0);
903 spin_lock_init(&ip
->i_flags_lock
);
904 init_waitqueue_head(&ip
->i_ipin_wait
);
906 * Because we want to use a counting completion, complete
907 * the flush completion once to allow a single access to
908 * the flush completion without blocking.
910 init_completion(&ip
->i_flush
);
911 complete(&ip
->i_flush
);
913 mrlock_init(&ip
->i_lock
, MRLOCK_ALLOW_EQUAL_PRI
|MRLOCK_BARRIER
,
914 "xfsino", ip
->i_ino
);
918 * Dirty the XFS inode when mark_inode_dirty_sync() is called so that
919 * we catch unlogged VFS level updates to the inode.
921 * We need the barrier() to maintain correct ordering between unlogged
922 * updates and the transaction commit code that clears the i_update_core
923 * field. This requires all updates to be completed before marking the
932 XFS_I(inode
)->i_update_core
= 1;
937 struct xfs_inode
*ip
)
939 struct xfs_mount
*mp
= ip
->i_mount
;
940 struct xfs_trans
*tp
;
943 xfs_iunlock(ip
, XFS_ILOCK_SHARED
);
944 tp
= xfs_trans_alloc(mp
, XFS_TRANS_FSYNC_TS
);
945 error
= xfs_trans_reserve(tp
, 0, XFS_FSYNC_TS_LOG_RES(mp
), 0, 0, 0);
948 xfs_trans_cancel(tp
, 0);
949 /* we need to return with the lock hold shared */
950 xfs_ilock(ip
, XFS_ILOCK_SHARED
);
954 xfs_ilock(ip
, XFS_ILOCK_EXCL
);
957 * Note - it's possible that we might have pushed ourselves out of the
958 * way during trans_reserve which would flush the inode. But there's
959 * no guarantee that the inode buffer has actually gone out yet (it's
960 * delwri). Plus the buffer could be pinned anyway if it's part of
961 * an inode in another recent transaction. So we play it safe and
962 * fire off the transaction anyway.
964 xfs_trans_ijoin(tp
, ip
);
965 xfs_trans_log_inode(tp
, ip
, XFS_ILOG_CORE
);
966 error
= xfs_trans_commit(tp
, 0);
967 xfs_ilock_demote(ip
, XFS_ILOCK_EXCL
);
975 struct writeback_control
*wbc
)
977 struct xfs_inode
*ip
= XFS_I(inode
);
978 struct xfs_mount
*mp
= ip
->i_mount
;
981 trace_xfs_write_inode(ip
);
983 if (XFS_FORCED_SHUTDOWN(mp
))
984 return XFS_ERROR(EIO
);
986 if (wbc
->sync_mode
== WB_SYNC_ALL
) {
988 * Make sure the inode has made it it into the log. Instead
989 * of forcing it all the way to stable storage using a
990 * synchronous transaction we let the log force inside the
991 * ->sync_fs call do that for thus, which reduces the number
992 * of synchronous log foces dramatically.
995 xfs_ilock(ip
, XFS_ILOCK_SHARED
);
996 if (ip
->i_update_core
) {
997 error
= xfs_log_inode(ip
);
1003 * We make this non-blocking if the inode is contended, return
1004 * EAGAIN to indicate to the caller that they did not succeed.
1005 * This prevents the flush path from blocking on inodes inside
1006 * another operation right now, they get caught later by
1009 if (!xfs_ilock_nowait(ip
, XFS_ILOCK_SHARED
))
1012 if (xfs_ipincount(ip
) || !xfs_iflock_nowait(ip
))
1016 * Now we have the flush lock and the inode is not pinned, we
1017 * can check if the inode is really clean as we know that
1018 * there are no pending transaction completions, it is not
1019 * waiting on the delayed write queue and there is no IO in
1022 if (xfs_inode_clean(ip
)) {
1027 error
= xfs_iflush(ip
, SYNC_TRYLOCK
);
1031 xfs_iunlock(ip
, XFS_ILOCK_SHARED
);
1034 * if we failed to write out the inode then mark
1035 * it dirty again so we'll try again later.
1038 xfs_mark_inode_dirty_sync(ip
);
1044 struct inode
*inode
)
1046 xfs_inode_t
*ip
= XFS_I(inode
);
1048 trace_xfs_evict_inode(ip
);
1050 truncate_inode_pages(&inode
->i_data
, 0);
1051 end_writeback(inode
);
1052 XFS_STATS_INC(vn_rele
);
1053 XFS_STATS_INC(vn_remove
);
1054 XFS_STATS_DEC(vn_active
);
1057 * The iolock is used by the file system to coordinate reads,
1058 * writes, and block truncates. Up to this point the lock
1059 * protected concurrent accesses by users of the inode. But
1060 * from here forward we're doing some final processing of the
1061 * inode because we're done with it, and although we reuse the
1062 * iolock for protection it is really a distinct lock class
1063 * (in the lockdep sense) from before. To keep lockdep happy
1064 * (and basically indicate what we are doing), we explicitly
1065 * re-init the iolock here.
1067 ASSERT(!rwsem_is_locked(&ip
->i_iolock
.mr_lock
));
1068 mrlock_init(&ip
->i_iolock
, MRLOCK_BARRIER
, "xfsio", ip
->i_ino
);
1069 lockdep_set_class_and_name(&ip
->i_iolock
.mr_lock
,
1070 &xfs_iolock_reclaimable
, "xfs_iolock_reclaimable");
1077 struct xfs_mount
*mp
)
1079 kfree(mp
->m_fsname
);
1080 kfree(mp
->m_rtname
);
1081 kfree(mp
->m_logname
);
1086 struct super_block
*sb
)
1088 struct xfs_mount
*mp
= XFS_M(sb
);
1091 * Unregister the memory shrinker before we tear down the mount
1092 * structure so we don't have memory reclaim racing with us here.
1094 xfs_inode_shrinker_unregister(mp
);
1098 * Blow away any referenced inode in the filestreams cache.
1099 * This can and will cause log traffic as inodes go inactive
1102 xfs_filestream_unmount(mp
);
1104 XFS_bflush(mp
->m_ddev_targp
);
1108 xfs_icsb_destroy_counters(mp
);
1109 xfs_close_devices(mp
);
1110 xfs_free_fsname(mp
);
1116 struct super_block
*sb
,
1119 struct xfs_mount
*mp
= XFS_M(sb
);
1123 * Not much we can do for the first async pass. Writing out the
1124 * superblock would be counter-productive as we are going to redirty
1125 * when writing out other data and metadata (and writing out a single
1126 * block is quite fast anyway).
1128 * Try to asynchronously kick off quota syncing at least.
1131 xfs_qm_sync(mp
, SYNC_TRYLOCK
);
1135 error
= xfs_quiesce_data(mp
);
1141 * The disk must be active because we're syncing.
1142 * We schedule xfssyncd now (now that the disk is
1143 * active) instead of later (when it might not be).
1145 flush_delayed_work_sync(&mp
->m_sync_work
);
1153 struct dentry
*dentry
,
1154 struct kstatfs
*statp
)
1156 struct xfs_mount
*mp
= XFS_M(dentry
->d_sb
);
1157 xfs_sb_t
*sbp
= &mp
->m_sb
;
1158 struct xfs_inode
*ip
= XFS_I(dentry
->d_inode
);
1159 __uint64_t fakeinos
, id
;
1163 statp
->f_type
= XFS_SB_MAGIC
;
1164 statp
->f_namelen
= MAXNAMELEN
- 1;
1166 id
= huge_encode_dev(mp
->m_ddev_targp
->bt_dev
);
1167 statp
->f_fsid
.val
[0] = (u32
)id
;
1168 statp
->f_fsid
.val
[1] = (u32
)(id
>> 32);
1170 xfs_icsb_sync_counters(mp
, XFS_ICSB_LAZY_COUNT
);
1172 spin_lock(&mp
->m_sb_lock
);
1173 statp
->f_bsize
= sbp
->sb_blocksize
;
1174 lsize
= sbp
->sb_logstart
? sbp
->sb_logblocks
: 0;
1175 statp
->f_blocks
= sbp
->sb_dblocks
- lsize
;
1176 statp
->f_bfree
= statp
->f_bavail
=
1177 sbp
->sb_fdblocks
- XFS_ALLOC_SET_ASIDE(mp
);
1178 fakeinos
= statp
->f_bfree
<< sbp
->sb_inopblog
;
1180 MIN(sbp
->sb_icount
+ fakeinos
, (__uint64_t
)XFS_MAXINUMBER
);
1181 if (mp
->m_maxicount
)
1182 statp
->f_files
= min_t(typeof(statp
->f_files
),
1186 /* make sure statp->f_ffree does not underflow */
1187 ffree
= statp
->f_files
- (sbp
->sb_icount
- sbp
->sb_ifree
);
1188 statp
->f_ffree
= max_t(__int64_t
, ffree
, 0);
1190 spin_unlock(&mp
->m_sb_lock
);
1192 if ((ip
->i_d
.di_flags
& XFS_DIFLAG_PROJINHERIT
) ||
1193 ((mp
->m_qflags
& (XFS_PQUOTA_ACCT
|XFS_OQUOTA_ENFD
))) ==
1194 (XFS_PQUOTA_ACCT
|XFS_OQUOTA_ENFD
))
1195 xfs_qm_statvfs(ip
, statp
);
1200 xfs_save_resvblks(struct xfs_mount
*mp
)
1202 __uint64_t resblks
= 0;
1204 mp
->m_resblks_save
= mp
->m_resblks
;
1205 xfs_reserve_blocks(mp
, &resblks
, NULL
);
1209 xfs_restore_resvblks(struct xfs_mount
*mp
)
1213 if (mp
->m_resblks_save
) {
1214 resblks
= mp
->m_resblks_save
;
1215 mp
->m_resblks_save
= 0;
1217 resblks
= xfs_default_resblks(mp
);
1219 xfs_reserve_blocks(mp
, &resblks
, NULL
);
1224 struct super_block
*sb
,
1228 struct xfs_mount
*mp
= XFS_M(sb
);
1229 substring_t args
[MAX_OPT_ARGS
];
1233 while ((p
= strsep(&options
, ",")) != NULL
) {
1239 token
= match_token(p
, tokens
, args
);
1242 mp
->m_flags
|= XFS_MOUNT_BARRIER
;
1245 * Test if barriers are actually working if we can,
1246 * else delay this check until the filesystem is
1249 if (!(mp
->m_flags
& XFS_MOUNT_RDONLY
))
1250 xfs_mountfs_check_barriers(mp
);
1253 mp
->m_flags
&= ~XFS_MOUNT_BARRIER
;
1257 * Logically we would return an error here to prevent
1258 * users from believing they might have changed
1259 * mount options using remount which can't be changed.
1261 * But unfortunately mount(8) adds all options from
1262 * mtab and fstab to the mount arguments in some cases
1263 * so we can't blindly reject options, but have to
1264 * check for each specified option if it actually
1265 * differs from the currently set option and only
1266 * reject it if that's the case.
1268 * Until that is implemented we return success for
1269 * every remount request, and silently ignore all
1270 * options that we can't actually change.
1274 "mount option \"%s\" not supported for remount\n", p
);
1283 if ((mp
->m_flags
& XFS_MOUNT_RDONLY
) && !(*flags
& MS_RDONLY
)) {
1284 mp
->m_flags
&= ~XFS_MOUNT_RDONLY
;
1285 if (mp
->m_flags
& XFS_MOUNT_BARRIER
)
1286 xfs_mountfs_check_barriers(mp
);
1289 * If this is the first remount to writeable state we
1290 * might have some superblock changes to update.
1292 if (mp
->m_update_flags
) {
1293 error
= xfs_mount_log_sb(mp
, mp
->m_update_flags
);
1295 xfs_warn(mp
, "failed to write sb changes");
1298 mp
->m_update_flags
= 0;
1302 * Fill out the reserve pool if it is empty. Use the stashed
1303 * value if it is non-zero, otherwise go with the default.
1305 xfs_restore_resvblks(mp
);
1309 if (!(mp
->m_flags
& XFS_MOUNT_RDONLY
) && (*flags
& MS_RDONLY
)) {
1311 * After we have synced the data but before we sync the
1312 * metadata, we need to free up the reserve block pool so that
1313 * the used block count in the superblock on disk is correct at
1314 * the end of the remount. Stash the current reserve pool size
1315 * so that if we get remounted rw, we can return it to the same
1319 xfs_quiesce_data(mp
);
1320 xfs_save_resvblks(mp
);
1321 xfs_quiesce_attr(mp
);
1322 mp
->m_flags
|= XFS_MOUNT_RDONLY
;
1329 * Second stage of a freeze. The data is already frozen so we only
1330 * need to take care of the metadata. Once that's done write a dummy
1331 * record to dirty the log in case of a crash while frozen.
1335 struct super_block
*sb
)
1337 struct xfs_mount
*mp
= XFS_M(sb
);
1339 xfs_save_resvblks(mp
);
1340 xfs_quiesce_attr(mp
);
1341 return -xfs_fs_log_dummy(mp
);
1346 struct super_block
*sb
)
1348 struct xfs_mount
*mp
= XFS_M(sb
);
1350 xfs_restore_resvblks(mp
);
1355 xfs_fs_show_options(
1357 struct vfsmount
*mnt
)
1359 return -xfs_showargs(XFS_M(mnt
->mnt_sb
), m
);
1363 * This function fills in xfs_mount_t fields based on mount args.
1364 * Note: the superblock _has_ now been read in.
1368 struct xfs_mount
*mp
)
1370 int ronly
= (mp
->m_flags
& XFS_MOUNT_RDONLY
);
1372 /* Fail a mount where the logbuf is smaller than the log stripe */
1373 if (xfs_sb_version_haslogv2(&mp
->m_sb
)) {
1374 if (mp
->m_logbsize
<= 0 &&
1375 mp
->m_sb
.sb_logsunit
> XLOG_BIG_RECORD_BSIZE
) {
1376 mp
->m_logbsize
= mp
->m_sb
.sb_logsunit
;
1377 } else if (mp
->m_logbsize
> 0 &&
1378 mp
->m_logbsize
< mp
->m_sb
.sb_logsunit
) {
1380 "logbuf size must be greater than or equal to log stripe size");
1381 return XFS_ERROR(EINVAL
);
1384 /* Fail a mount if the logbuf is larger than 32K */
1385 if (mp
->m_logbsize
> XLOG_BIG_RECORD_BSIZE
) {
1387 "logbuf size for version 1 logs must be 16K or 32K");
1388 return XFS_ERROR(EINVAL
);
1393 * mkfs'ed attr2 will turn on attr2 mount unless explicitly
1394 * told by noattr2 to turn it off
1396 if (xfs_sb_version_hasattr2(&mp
->m_sb
) &&
1397 !(mp
->m_flags
& XFS_MOUNT_NOATTR2
))
1398 mp
->m_flags
|= XFS_MOUNT_ATTR2
;
1401 * prohibit r/w mounts of read-only filesystems
1403 if ((mp
->m_sb
.sb_flags
& XFS_SBF_READONLY
) && !ronly
) {
1405 "cannot mount a read-only filesystem as read-write");
1406 return XFS_ERROR(EROFS
);
1414 struct super_block
*sb
,
1419 struct xfs_mount
*mp
= NULL
;
1420 int flags
= 0, error
= ENOMEM
;
1422 mp
= kzalloc(sizeof(struct xfs_mount
), GFP_KERNEL
);
1426 spin_lock_init(&mp
->m_sb_lock
);
1427 mutex_init(&mp
->m_growlock
);
1428 atomic_set(&mp
->m_active_trans
, 0);
1433 error
= xfs_parseargs(mp
, (char *)data
);
1435 goto out_free_fsname
;
1437 sb_min_blocksize(sb
, BBSIZE
);
1438 sb
->s_xattr
= xfs_xattr_handlers
;
1439 sb
->s_export_op
= &xfs_export_operations
;
1440 #ifdef CONFIG_XFS_QUOTA
1441 sb
->s_qcop
= &xfs_quotactl_operations
;
1443 sb
->s_op
= &xfs_super_operations
;
1446 flags
|= XFS_MFSI_QUIET
;
1448 error
= xfs_open_devices(mp
);
1450 goto out_free_fsname
;
1452 error
= xfs_icsb_init_counters(mp
);
1454 goto out_close_devices
;
1456 error
= xfs_readsb(mp
, flags
);
1458 goto out_destroy_counters
;
1460 error
= xfs_finish_flags(mp
);
1464 error
= xfs_setup_devices(mp
);
1468 if (mp
->m_flags
& XFS_MOUNT_BARRIER
)
1469 xfs_mountfs_check_barriers(mp
);
1471 error
= xfs_filestream_mount(mp
);
1476 * we must configure the block size in the superblock before we run the
1477 * full mount process as the mount process can lookup and cache inodes.
1478 * For the same reason we must also initialise the syncd and register
1479 * the inode cache shrinker so that inodes can be reclaimed during
1480 * operations like a quotacheck that iterate all inodes in the
1483 sb
->s_magic
= XFS_SB_MAGIC
;
1484 sb
->s_blocksize
= mp
->m_sb
.sb_blocksize
;
1485 sb
->s_blocksize_bits
= ffs(sb
->s_blocksize
) - 1;
1486 sb
->s_maxbytes
= xfs_max_file_offset(sb
->s_blocksize_bits
);
1487 sb
->s_time_gran
= 1;
1488 set_posix_acl_flag(sb
);
1490 error
= xfs_syncd_init(mp
);
1492 goto out_filestream_unmount
;
1494 xfs_inode_shrinker_register(mp
);
1496 error
= xfs_mountfs(mp
);
1498 goto out_syncd_stop
;
1500 root
= igrab(VFS_I(mp
->m_rootip
));
1505 if (is_bad_inode(root
)) {
1509 sb
->s_root
= d_alloc_root(root
);
1518 xfs_inode_shrinker_unregister(mp
);
1520 out_filestream_unmount
:
1521 xfs_filestream_unmount(mp
);
1524 out_destroy_counters
:
1525 xfs_icsb_destroy_counters(mp
);
1527 xfs_close_devices(mp
);
1529 xfs_free_fsname(mp
);
1543 xfs_inode_shrinker_unregister(mp
);
1547 * Blow away any referenced inode in the filestreams cache.
1548 * This can and will cause log traffic as inodes go inactive
1551 xfs_filestream_unmount(mp
);
1553 XFS_bflush(mp
->m_ddev_targp
);
1559 STATIC
struct dentry
*
1561 struct file_system_type
*fs_type
,
1563 const char *dev_name
,
1566 return mount_bdev(fs_type
, flags
, dev_name
, data
, xfs_fs_fill_super
);
1569 static const struct super_operations xfs_super_operations
= {
1570 .alloc_inode
= xfs_fs_alloc_inode
,
1571 .destroy_inode
= xfs_fs_destroy_inode
,
1572 .dirty_inode
= xfs_fs_dirty_inode
,
1573 .write_inode
= xfs_fs_write_inode
,
1574 .evict_inode
= xfs_fs_evict_inode
,
1575 .put_super
= xfs_fs_put_super
,
1576 .sync_fs
= xfs_fs_sync_fs
,
1577 .freeze_fs
= xfs_fs_freeze
,
1578 .unfreeze_fs
= xfs_fs_unfreeze
,
1579 .statfs
= xfs_fs_statfs
,
1580 .remount_fs
= xfs_fs_remount
,
1581 .show_options
= xfs_fs_show_options
,
1584 static struct file_system_type xfs_fs_type
= {
1585 .owner
= THIS_MODULE
,
1587 .mount
= xfs_fs_mount
,
1588 .kill_sb
= kill_block_super
,
1589 .fs_flags
= FS_REQUIRES_DEV
,
1593 xfs_init_zones(void)
1596 xfs_ioend_zone
= kmem_zone_init(sizeof(xfs_ioend_t
), "xfs_ioend");
1597 if (!xfs_ioend_zone
)
1600 xfs_ioend_pool
= mempool_create_slab_pool(4 * MAX_BUF_PER_PAGE
,
1602 if (!xfs_ioend_pool
)
1603 goto out_destroy_ioend_zone
;
1605 xfs_log_ticket_zone
= kmem_zone_init(sizeof(xlog_ticket_t
),
1607 if (!xfs_log_ticket_zone
)
1608 goto out_destroy_ioend_pool
;
1610 xfs_bmap_free_item_zone
= kmem_zone_init(sizeof(xfs_bmap_free_item_t
),
1611 "xfs_bmap_free_item");
1612 if (!xfs_bmap_free_item_zone
)
1613 goto out_destroy_log_ticket_zone
;
1615 xfs_btree_cur_zone
= kmem_zone_init(sizeof(xfs_btree_cur_t
),
1617 if (!xfs_btree_cur_zone
)
1618 goto out_destroy_bmap_free_item_zone
;
1620 xfs_da_state_zone
= kmem_zone_init(sizeof(xfs_da_state_t
),
1622 if (!xfs_da_state_zone
)
1623 goto out_destroy_btree_cur_zone
;
1625 xfs_dabuf_zone
= kmem_zone_init(sizeof(xfs_dabuf_t
), "xfs_dabuf");
1626 if (!xfs_dabuf_zone
)
1627 goto out_destroy_da_state_zone
;
1629 xfs_ifork_zone
= kmem_zone_init(sizeof(xfs_ifork_t
), "xfs_ifork");
1630 if (!xfs_ifork_zone
)
1631 goto out_destroy_dabuf_zone
;
1633 xfs_trans_zone
= kmem_zone_init(sizeof(xfs_trans_t
), "xfs_trans");
1634 if (!xfs_trans_zone
)
1635 goto out_destroy_ifork_zone
;
1637 xfs_log_item_desc_zone
=
1638 kmem_zone_init(sizeof(struct xfs_log_item_desc
),
1639 "xfs_log_item_desc");
1640 if (!xfs_log_item_desc_zone
)
1641 goto out_destroy_trans_zone
;
1644 * The size of the zone allocated buf log item is the maximum
1645 * size possible under XFS. This wastes a little bit of memory,
1646 * but it is much faster.
1648 xfs_buf_item_zone
= kmem_zone_init((sizeof(xfs_buf_log_item_t
) +
1649 (((XFS_MAX_BLOCKSIZE
/ XFS_BLF_CHUNK
) /
1650 NBWORD
) * sizeof(int))), "xfs_buf_item");
1651 if (!xfs_buf_item_zone
)
1652 goto out_destroy_log_item_desc_zone
;
1654 xfs_efd_zone
= kmem_zone_init((sizeof(xfs_efd_log_item_t
) +
1655 ((XFS_EFD_MAX_FAST_EXTENTS
- 1) *
1656 sizeof(xfs_extent_t
))), "xfs_efd_item");
1658 goto out_destroy_buf_item_zone
;
1660 xfs_efi_zone
= kmem_zone_init((sizeof(xfs_efi_log_item_t
) +
1661 ((XFS_EFI_MAX_FAST_EXTENTS
- 1) *
1662 sizeof(xfs_extent_t
))), "xfs_efi_item");
1664 goto out_destroy_efd_zone
;
1667 kmem_zone_init_flags(sizeof(xfs_inode_t
), "xfs_inode",
1668 KM_ZONE_HWALIGN
| KM_ZONE_RECLAIM
| KM_ZONE_SPREAD
,
1669 xfs_fs_inode_init_once
);
1670 if (!xfs_inode_zone
)
1671 goto out_destroy_efi_zone
;
1674 kmem_zone_init_flags(sizeof(xfs_inode_log_item_t
), "xfs_ili",
1675 KM_ZONE_SPREAD
, NULL
);
1677 goto out_destroy_inode_zone
;
1681 out_destroy_inode_zone
:
1682 kmem_zone_destroy(xfs_inode_zone
);
1683 out_destroy_efi_zone
:
1684 kmem_zone_destroy(xfs_efi_zone
);
1685 out_destroy_efd_zone
:
1686 kmem_zone_destroy(xfs_efd_zone
);
1687 out_destroy_buf_item_zone
:
1688 kmem_zone_destroy(xfs_buf_item_zone
);
1689 out_destroy_log_item_desc_zone
:
1690 kmem_zone_destroy(xfs_log_item_desc_zone
);
1691 out_destroy_trans_zone
:
1692 kmem_zone_destroy(xfs_trans_zone
);
1693 out_destroy_ifork_zone
:
1694 kmem_zone_destroy(xfs_ifork_zone
);
1695 out_destroy_dabuf_zone
:
1696 kmem_zone_destroy(xfs_dabuf_zone
);
1697 out_destroy_da_state_zone
:
1698 kmem_zone_destroy(xfs_da_state_zone
);
1699 out_destroy_btree_cur_zone
:
1700 kmem_zone_destroy(xfs_btree_cur_zone
);
1701 out_destroy_bmap_free_item_zone
:
1702 kmem_zone_destroy(xfs_bmap_free_item_zone
);
1703 out_destroy_log_ticket_zone
:
1704 kmem_zone_destroy(xfs_log_ticket_zone
);
1705 out_destroy_ioend_pool
:
1706 mempool_destroy(xfs_ioend_pool
);
1707 out_destroy_ioend_zone
:
1708 kmem_zone_destroy(xfs_ioend_zone
);
1714 xfs_destroy_zones(void)
1716 kmem_zone_destroy(xfs_ili_zone
);
1717 kmem_zone_destroy(xfs_inode_zone
);
1718 kmem_zone_destroy(xfs_efi_zone
);
1719 kmem_zone_destroy(xfs_efd_zone
);
1720 kmem_zone_destroy(xfs_buf_item_zone
);
1721 kmem_zone_destroy(xfs_log_item_desc_zone
);
1722 kmem_zone_destroy(xfs_trans_zone
);
1723 kmem_zone_destroy(xfs_ifork_zone
);
1724 kmem_zone_destroy(xfs_dabuf_zone
);
1725 kmem_zone_destroy(xfs_da_state_zone
);
1726 kmem_zone_destroy(xfs_btree_cur_zone
);
1727 kmem_zone_destroy(xfs_bmap_free_item_zone
);
1728 kmem_zone_destroy(xfs_log_ticket_zone
);
1729 mempool_destroy(xfs_ioend_pool
);
1730 kmem_zone_destroy(xfs_ioend_zone
);
1735 xfs_init_workqueues(void)
1738 * max_active is set to 8 to give enough concurency to allow
1739 * multiple work operations on each CPU to run. This allows multiple
1740 * filesystems to be running sync work concurrently, and scales with
1741 * the number of CPUs in the system.
1743 xfs_syncd_wq
= alloc_workqueue("xfssyncd", WQ_CPU_INTENSIVE
, 8);
1747 xfs_ail_wq
= alloc_workqueue("xfsail", WQ_CPU_INTENSIVE
, 8);
1749 goto out_destroy_syncd
;
1754 destroy_workqueue(xfs_syncd_wq
);
1760 xfs_destroy_workqueues(void)
1762 destroy_workqueue(xfs_ail_wq
);
1763 destroy_workqueue(xfs_syncd_wq
);
1771 printk(KERN_INFO XFS_VERSION_STRING
" with "
1772 XFS_BUILD_OPTIONS
" enabled\n");
1777 error
= xfs_init_zones();
1781 error
= xfs_init_workqueues();
1783 goto out_destroy_zones
;
1785 error
= xfs_mru_cache_init();
1787 goto out_destroy_wq
;
1789 error
= xfs_filestream_init();
1791 goto out_mru_cache_uninit
;
1793 error
= xfs_buf_init();
1795 goto out_filestream_uninit
;
1797 error
= xfs_init_procfs();
1799 goto out_buf_terminate
;
1801 error
= xfs_sysctl_register();
1803 goto out_cleanup_procfs
;
1807 error
= register_filesystem(&xfs_fs_type
);
1809 goto out_sysctl_unregister
;
1812 out_sysctl_unregister
:
1813 xfs_sysctl_unregister();
1815 xfs_cleanup_procfs();
1817 xfs_buf_terminate();
1818 out_filestream_uninit
:
1819 xfs_filestream_uninit();
1820 out_mru_cache_uninit
:
1821 xfs_mru_cache_uninit();
1823 xfs_destroy_workqueues();
1825 xfs_destroy_zones();
1834 unregister_filesystem(&xfs_fs_type
);
1835 xfs_sysctl_unregister();
1836 xfs_cleanup_procfs();
1837 xfs_buf_terminate();
1838 xfs_filestream_uninit();
1839 xfs_mru_cache_uninit();
1840 xfs_destroy_workqueues();
1841 xfs_destroy_zones();
1844 module_init(init_xfs_fs
);
1845 module_exit(exit_xfs_fs
);
1847 MODULE_AUTHOR("Silicon Graphics, Inc.");
1848 MODULE_DESCRIPTION(XFS_VERSION_STRING
" with " XFS_BUILD_OPTIONS
" enabled");
1849 MODULE_LICENSE("GPL");