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
20 #include "xfs_format.h"
23 #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_log_priv.h"
44 #include "xfs_trans_priv.h"
45 #include "xfs_filestream.h"
46 #include "xfs_da_btree.h"
47 #include "xfs_dir2_format.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"
54 #include "xfs_icreate_item.h"
56 #include <linux/namei.h>
57 #include <linux/init.h>
58 #include <linux/slab.h>
59 #include <linux/mount.h>
60 #include <linux/mempool.h>
61 #include <linux/writeback.h>
62 #include <linux/kthread.h>
63 #include <linux/freezer.h>
64 #include <linux/parser.h>
66 static const struct super_operations xfs_super_operations
;
67 static kmem_zone_t
*xfs_ioend_zone
;
68 mempool_t
*xfs_ioend_pool
;
70 #define MNTOPT_LOGBUFS "logbufs" /* number of XFS log buffers */
71 #define MNTOPT_LOGBSIZE "logbsize" /* size of XFS log buffers */
72 #define MNTOPT_LOGDEV "logdev" /* log device */
73 #define MNTOPT_RTDEV "rtdev" /* realtime I/O device */
74 #define MNTOPT_BIOSIZE "biosize" /* log2 of preferred buffered io size */
75 #define MNTOPT_WSYNC "wsync" /* safe-mode nfs compatible mount */
76 #define MNTOPT_NOALIGN "noalign" /* turn off stripe alignment */
77 #define MNTOPT_SWALLOC "swalloc" /* turn on stripe width allocation */
78 #define MNTOPT_SUNIT "sunit" /* data volume stripe unit */
79 #define MNTOPT_SWIDTH "swidth" /* data volume stripe width */
80 #define MNTOPT_NOUUID "nouuid" /* ignore filesystem UUID */
81 #define MNTOPT_MTPT "mtpt" /* filesystem mount point */
82 #define MNTOPT_GRPID "grpid" /* group-ID from parent directory */
83 #define MNTOPT_NOGRPID "nogrpid" /* group-ID from current process */
84 #define MNTOPT_BSDGROUPS "bsdgroups" /* group-ID from parent directory */
85 #define MNTOPT_SYSVGROUPS "sysvgroups" /* group-ID from current process */
86 #define MNTOPT_ALLOCSIZE "allocsize" /* preferred allocation size */
87 #define MNTOPT_NORECOVERY "norecovery" /* don't run XFS recovery */
88 #define MNTOPT_BARRIER "barrier" /* use writer barriers for log write and
89 * unwritten extent conversion */
90 #define MNTOPT_NOBARRIER "nobarrier" /* .. disable */
91 #define MNTOPT_64BITINODE "inode64" /* inodes can be allocated anywhere */
92 #define MNTOPT_32BITINODE "inode32" /* inode allocation limited to
93 * XFS_MAXINUMBER_32 */
94 #define MNTOPT_IKEEP "ikeep" /* do not free empty inode clusters */
95 #define MNTOPT_NOIKEEP "noikeep" /* free empty inode clusters */
96 #define MNTOPT_LARGEIO "largeio" /* report large I/O sizes in stat() */
97 #define MNTOPT_NOLARGEIO "nolargeio" /* do not report large I/O sizes
99 #define MNTOPT_ATTR2 "attr2" /* do use attr2 attribute format */
100 #define MNTOPT_NOATTR2 "noattr2" /* do not use attr2 attribute format */
101 #define MNTOPT_FILESTREAM "filestreams" /* use filestreams allocator */
102 #define MNTOPT_QUOTA "quota" /* disk quotas (user) */
103 #define MNTOPT_NOQUOTA "noquota" /* no quotas */
104 #define MNTOPT_USRQUOTA "usrquota" /* user quota enabled */
105 #define MNTOPT_GRPQUOTA "grpquota" /* group quota enabled */
106 #define MNTOPT_PRJQUOTA "prjquota" /* project quota enabled */
107 #define MNTOPT_UQUOTA "uquota" /* user quota (IRIX variant) */
108 #define MNTOPT_GQUOTA "gquota" /* group quota (IRIX variant) */
109 #define MNTOPT_PQUOTA "pquota" /* project quota (IRIX variant) */
110 #define MNTOPT_UQUOTANOENF "uqnoenforce"/* user quota limit enforcement */
111 #define MNTOPT_GQUOTANOENF "gqnoenforce"/* group quota limit enforcement */
112 #define MNTOPT_PQUOTANOENF "pqnoenforce"/* project quota limit enforcement */
113 #define MNTOPT_QUOTANOENF "qnoenforce" /* same as uqnoenforce */
114 #define MNTOPT_DELAYLOG "delaylog" /* Delayed logging enabled */
115 #define MNTOPT_NODELAYLOG "nodelaylog" /* Delayed logging disabled */
116 #define MNTOPT_DISCARD "discard" /* Discard unused blocks */
117 #define MNTOPT_NODISCARD "nodiscard" /* Do not discard unused blocks */
120 * Table driven mount option parser.
122 * Currently only used for remount, but it will be used for mount
123 * in the future, too.
133 static const match_table_t tokens
= {
134 {Opt_barrier
, "barrier"},
135 {Opt_nobarrier
, "nobarrier"},
136 {Opt_inode64
, "inode64"},
137 {Opt_inode32
, "inode32"},
143 suffix_kstrtoint(char *s
, unsigned int base
, int *res
)
145 int last
, shift_left_factor
= 0, _res
;
148 last
= strlen(value
) - 1;
149 if (value
[last
] == 'K' || value
[last
] == 'k') {
150 shift_left_factor
= 10;
153 if (value
[last
] == 'M' || value
[last
] == 'm') {
154 shift_left_factor
= 20;
157 if (value
[last
] == 'G' || value
[last
] == 'g') {
158 shift_left_factor
= 30;
162 if (kstrtoint(s
, base
, &_res
))
164 *res
= _res
<< shift_left_factor
;
169 * This function fills in xfs_mount_t fields based on mount args.
170 * Note: the superblock has _not_ yet been read in.
172 * Note that this function leaks the various device name allocations on
173 * failure. The caller takes care of them.
177 struct xfs_mount
*mp
,
180 struct super_block
*sb
= mp
->m_super
;
181 char *this_char
, *value
;
185 __uint8_t iosizelog
= 0;
188 * set up the mount name first so all the errors will refer to the
191 mp
->m_fsname
= kstrndup(sb
->s_id
, MAXNAMELEN
, GFP_KERNEL
);
194 mp
->m_fsname_len
= strlen(mp
->m_fsname
) + 1;
197 * Copy binary VFS mount flags we are interested in.
199 if (sb
->s_flags
& MS_RDONLY
)
200 mp
->m_flags
|= XFS_MOUNT_RDONLY
;
201 if (sb
->s_flags
& MS_DIRSYNC
)
202 mp
->m_flags
|= XFS_MOUNT_DIRSYNC
;
203 if (sb
->s_flags
& MS_SYNCHRONOUS
)
204 mp
->m_flags
|= XFS_MOUNT_WSYNC
;
207 * Set some default flags that could be cleared by the mount option
210 mp
->m_flags
|= XFS_MOUNT_BARRIER
;
211 mp
->m_flags
|= XFS_MOUNT_COMPAT_IOSIZE
;
213 mp
->m_flags
|= XFS_MOUNT_SMALL_INUMS
;
217 * These can be overridden by the mount option parsing.
225 while ((this_char
= strsep(&options
, ",")) != NULL
) {
228 if ((value
= strchr(this_char
, '=')) != NULL
)
231 if (!strcmp(this_char
, MNTOPT_LOGBUFS
)) {
232 if (!value
|| !*value
) {
233 xfs_warn(mp
, "%s option requires an argument",
237 if (kstrtoint(value
, 10, &mp
->m_logbufs
))
239 } else if (!strcmp(this_char
, MNTOPT_LOGBSIZE
)) {
240 if (!value
|| !*value
) {
241 xfs_warn(mp
, "%s option requires an argument",
245 if (suffix_kstrtoint(value
, 10, &mp
->m_logbsize
))
247 } else if (!strcmp(this_char
, MNTOPT_LOGDEV
)) {
248 if (!value
|| !*value
) {
249 xfs_warn(mp
, "%s option requires an argument",
253 mp
->m_logname
= kstrndup(value
, MAXNAMELEN
, GFP_KERNEL
);
256 } else if (!strcmp(this_char
, MNTOPT_MTPT
)) {
257 xfs_warn(mp
, "%s option not allowed on this system",
260 } else if (!strcmp(this_char
, MNTOPT_RTDEV
)) {
261 if (!value
|| !*value
) {
262 xfs_warn(mp
, "%s option requires an argument",
266 mp
->m_rtname
= kstrndup(value
, MAXNAMELEN
, GFP_KERNEL
);
269 } else if (!strcmp(this_char
, MNTOPT_BIOSIZE
)) {
270 if (!value
|| !*value
) {
271 xfs_warn(mp
, "%s option requires an argument",
275 if (kstrtoint(value
, 10, &iosize
))
277 iosizelog
= ffs(iosize
) - 1;
278 } else if (!strcmp(this_char
, MNTOPT_ALLOCSIZE
)) {
279 if (!value
|| !*value
) {
280 xfs_warn(mp
, "%s option requires an argument",
284 if (suffix_kstrtoint(value
, 10, &iosize
))
286 iosizelog
= ffs(iosize
) - 1;
287 } else if (!strcmp(this_char
, MNTOPT_GRPID
) ||
288 !strcmp(this_char
, MNTOPT_BSDGROUPS
)) {
289 mp
->m_flags
|= XFS_MOUNT_GRPID
;
290 } else if (!strcmp(this_char
, MNTOPT_NOGRPID
) ||
291 !strcmp(this_char
, MNTOPT_SYSVGROUPS
)) {
292 mp
->m_flags
&= ~XFS_MOUNT_GRPID
;
293 } else if (!strcmp(this_char
, MNTOPT_WSYNC
)) {
294 mp
->m_flags
|= XFS_MOUNT_WSYNC
;
295 } else if (!strcmp(this_char
, MNTOPT_NORECOVERY
)) {
296 mp
->m_flags
|= XFS_MOUNT_NORECOVERY
;
297 } else if (!strcmp(this_char
, MNTOPT_NOALIGN
)) {
298 mp
->m_flags
|= XFS_MOUNT_NOALIGN
;
299 } else if (!strcmp(this_char
, MNTOPT_SWALLOC
)) {
300 mp
->m_flags
|= XFS_MOUNT_SWALLOC
;
301 } else if (!strcmp(this_char
, MNTOPT_SUNIT
)) {
302 if (!value
|| !*value
) {
303 xfs_warn(mp
, "%s option requires an argument",
307 if (kstrtoint(value
, 10, &dsunit
))
309 } else if (!strcmp(this_char
, MNTOPT_SWIDTH
)) {
310 if (!value
|| !*value
) {
311 xfs_warn(mp
, "%s option requires an argument",
315 if (kstrtoint(value
, 10, &dswidth
))
317 } else if (!strcmp(this_char
, MNTOPT_32BITINODE
)) {
318 mp
->m_flags
|= XFS_MOUNT_SMALL_INUMS
;
319 } else if (!strcmp(this_char
, MNTOPT_64BITINODE
)) {
320 mp
->m_flags
&= ~XFS_MOUNT_SMALL_INUMS
;
322 xfs_warn(mp
, "%s option not allowed on this system",
326 } else if (!strcmp(this_char
, MNTOPT_NOUUID
)) {
327 mp
->m_flags
|= XFS_MOUNT_NOUUID
;
328 } else if (!strcmp(this_char
, MNTOPT_BARRIER
)) {
329 mp
->m_flags
|= XFS_MOUNT_BARRIER
;
330 } else if (!strcmp(this_char
, MNTOPT_NOBARRIER
)) {
331 mp
->m_flags
&= ~XFS_MOUNT_BARRIER
;
332 } else if (!strcmp(this_char
, MNTOPT_IKEEP
)) {
333 mp
->m_flags
|= XFS_MOUNT_IKEEP
;
334 } else if (!strcmp(this_char
, MNTOPT_NOIKEEP
)) {
335 mp
->m_flags
&= ~XFS_MOUNT_IKEEP
;
336 } else if (!strcmp(this_char
, MNTOPT_LARGEIO
)) {
337 mp
->m_flags
&= ~XFS_MOUNT_COMPAT_IOSIZE
;
338 } else if (!strcmp(this_char
, MNTOPT_NOLARGEIO
)) {
339 mp
->m_flags
|= XFS_MOUNT_COMPAT_IOSIZE
;
340 } else if (!strcmp(this_char
, MNTOPT_ATTR2
)) {
341 mp
->m_flags
|= XFS_MOUNT_ATTR2
;
342 } else if (!strcmp(this_char
, MNTOPT_NOATTR2
)) {
343 mp
->m_flags
&= ~XFS_MOUNT_ATTR2
;
344 mp
->m_flags
|= XFS_MOUNT_NOATTR2
;
345 } else if (!strcmp(this_char
, MNTOPT_FILESTREAM
)) {
346 mp
->m_flags
|= XFS_MOUNT_FILESTREAMS
;
347 } else if (!strcmp(this_char
, MNTOPT_NOQUOTA
)) {
348 mp
->m_qflags
&= ~XFS_ALL_QUOTA_ACCT
;
349 mp
->m_qflags
&= ~XFS_ALL_QUOTA_ENFD
;
350 mp
->m_qflags
&= ~XFS_ALL_QUOTA_ACTIVE
;
351 } else if (!strcmp(this_char
, MNTOPT_QUOTA
) ||
352 !strcmp(this_char
, MNTOPT_UQUOTA
) ||
353 !strcmp(this_char
, MNTOPT_USRQUOTA
)) {
354 mp
->m_qflags
|= (XFS_UQUOTA_ACCT
| XFS_UQUOTA_ACTIVE
|
356 } else if (!strcmp(this_char
, MNTOPT_QUOTANOENF
) ||
357 !strcmp(this_char
, MNTOPT_UQUOTANOENF
)) {
358 mp
->m_qflags
|= (XFS_UQUOTA_ACCT
| XFS_UQUOTA_ACTIVE
);
359 mp
->m_qflags
&= ~XFS_UQUOTA_ENFD
;
360 } else if (!strcmp(this_char
, MNTOPT_PQUOTA
) ||
361 !strcmp(this_char
, MNTOPT_PRJQUOTA
)) {
362 mp
->m_qflags
|= (XFS_PQUOTA_ACCT
| XFS_PQUOTA_ACTIVE
|
364 } else if (!strcmp(this_char
, MNTOPT_PQUOTANOENF
)) {
365 mp
->m_qflags
|= (XFS_PQUOTA_ACCT
| XFS_PQUOTA_ACTIVE
);
366 mp
->m_qflags
&= ~XFS_PQUOTA_ENFD
;
367 } else if (!strcmp(this_char
, MNTOPT_GQUOTA
) ||
368 !strcmp(this_char
, MNTOPT_GRPQUOTA
)) {
369 mp
->m_qflags
|= (XFS_GQUOTA_ACCT
| XFS_GQUOTA_ACTIVE
|
371 } else if (!strcmp(this_char
, MNTOPT_GQUOTANOENF
)) {
372 mp
->m_qflags
|= (XFS_GQUOTA_ACCT
| XFS_GQUOTA_ACTIVE
);
373 mp
->m_qflags
&= ~XFS_GQUOTA_ENFD
;
374 } else if (!strcmp(this_char
, MNTOPT_DELAYLOG
)) {
376 "delaylog is the default now, option is deprecated.");
377 } else if (!strcmp(this_char
, MNTOPT_NODELAYLOG
)) {
379 "nodelaylog support has been removed, option is deprecated.");
380 } else if (!strcmp(this_char
, MNTOPT_DISCARD
)) {
381 mp
->m_flags
|= XFS_MOUNT_DISCARD
;
382 } else if (!strcmp(this_char
, MNTOPT_NODISCARD
)) {
383 mp
->m_flags
&= ~XFS_MOUNT_DISCARD
;
384 } else if (!strcmp(this_char
, "ihashsize")) {
386 "ihashsize no longer used, option is deprecated.");
387 } else if (!strcmp(this_char
, "osyncisdsync")) {
389 "osyncisdsync has no effect, option is deprecated.");
390 } else if (!strcmp(this_char
, "osyncisosync")) {
392 "osyncisosync has no effect, option is deprecated.");
393 } else if (!strcmp(this_char
, "irixsgid")) {
395 "irixsgid is now a sysctl(2) variable, option is deprecated.");
397 xfs_warn(mp
, "unknown mount option [%s].", this_char
);
403 * no recovery flag requires a read-only mount
405 if ((mp
->m_flags
& XFS_MOUNT_NORECOVERY
) &&
406 !(mp
->m_flags
& XFS_MOUNT_RDONLY
)) {
407 xfs_warn(mp
, "no-recovery mounts must be read-only.");
411 if ((mp
->m_flags
& XFS_MOUNT_NOALIGN
) && (dsunit
|| dswidth
)) {
413 "sunit and swidth options incompatible with the noalign option");
417 #ifndef CONFIG_XFS_QUOTA
418 if (XFS_IS_QUOTA_RUNNING(mp
)) {
419 xfs_warn(mp
, "quota support not available in this kernel.");
424 if ((dsunit
&& !dswidth
) || (!dsunit
&& dswidth
)) {
425 xfs_warn(mp
, "sunit and swidth must be specified together");
429 if (dsunit
&& (dswidth
% dsunit
!= 0)) {
431 "stripe width (%d) must be a multiple of the stripe unit (%d)",
437 if (dsunit
&& !(mp
->m_flags
& XFS_MOUNT_NOALIGN
)) {
439 * At this point the superblock has not been read
440 * in, therefore we do not know the block size.
441 * Before the mount call ends we will convert
444 mp
->m_dalign
= dsunit
;
445 mp
->m_swidth
= dswidth
;
448 if (mp
->m_logbufs
!= -1 &&
449 mp
->m_logbufs
!= 0 &&
450 (mp
->m_logbufs
< XLOG_MIN_ICLOGS
||
451 mp
->m_logbufs
> XLOG_MAX_ICLOGS
)) {
452 xfs_warn(mp
, "invalid logbufs value: %d [not %d-%d]",
453 mp
->m_logbufs
, XLOG_MIN_ICLOGS
, XLOG_MAX_ICLOGS
);
454 return XFS_ERROR(EINVAL
);
456 if (mp
->m_logbsize
!= -1 &&
457 mp
->m_logbsize
!= 0 &&
458 (mp
->m_logbsize
< XLOG_MIN_RECORD_BSIZE
||
459 mp
->m_logbsize
> XLOG_MAX_RECORD_BSIZE
||
460 !is_power_of_2(mp
->m_logbsize
))) {
462 "invalid logbufsize: %d [not 16k,32k,64k,128k or 256k]",
464 return XFS_ERROR(EINVAL
);
468 if (iosizelog
> XFS_MAX_IO_LOG
||
469 iosizelog
< XFS_MIN_IO_LOG
) {
470 xfs_warn(mp
, "invalid log iosize: %d [not %d-%d]",
471 iosizelog
, XFS_MIN_IO_LOG
,
473 return XFS_ERROR(EINVAL
);
476 mp
->m_flags
|= XFS_MOUNT_DFLT_IOSIZE
;
477 mp
->m_readio_log
= iosizelog
;
478 mp
->m_writeio_log
= iosizelog
;
484 struct proc_xfs_info
{
491 struct xfs_mount
*mp
,
494 static struct proc_xfs_info xfs_info_set
[] = {
495 /* the few simple ones we can get from the mount struct */
496 { XFS_MOUNT_IKEEP
, "," MNTOPT_IKEEP
},
497 { XFS_MOUNT_WSYNC
, "," MNTOPT_WSYNC
},
498 { XFS_MOUNT_NOALIGN
, "," MNTOPT_NOALIGN
},
499 { XFS_MOUNT_SWALLOC
, "," MNTOPT_SWALLOC
},
500 { XFS_MOUNT_NOUUID
, "," MNTOPT_NOUUID
},
501 { XFS_MOUNT_NORECOVERY
, "," MNTOPT_NORECOVERY
},
502 { XFS_MOUNT_ATTR2
, "," MNTOPT_ATTR2
},
503 { XFS_MOUNT_FILESTREAMS
, "," MNTOPT_FILESTREAM
},
504 { XFS_MOUNT_GRPID
, "," MNTOPT_GRPID
},
505 { XFS_MOUNT_DISCARD
, "," MNTOPT_DISCARD
},
506 { XFS_MOUNT_SMALL_INUMS
, "," MNTOPT_32BITINODE
},
509 static struct proc_xfs_info xfs_info_unset
[] = {
510 /* the few simple ones we can get from the mount struct */
511 { XFS_MOUNT_COMPAT_IOSIZE
, "," MNTOPT_LARGEIO
},
512 { XFS_MOUNT_BARRIER
, "," MNTOPT_NOBARRIER
},
513 { XFS_MOUNT_SMALL_INUMS
, "," MNTOPT_64BITINODE
},
516 struct proc_xfs_info
*xfs_infop
;
518 for (xfs_infop
= xfs_info_set
; xfs_infop
->flag
; xfs_infop
++) {
519 if (mp
->m_flags
& xfs_infop
->flag
)
520 seq_puts(m
, xfs_infop
->str
);
522 for (xfs_infop
= xfs_info_unset
; xfs_infop
->flag
; xfs_infop
++) {
523 if (!(mp
->m_flags
& xfs_infop
->flag
))
524 seq_puts(m
, xfs_infop
->str
);
527 if (mp
->m_flags
& XFS_MOUNT_DFLT_IOSIZE
)
528 seq_printf(m
, "," MNTOPT_ALLOCSIZE
"=%dk",
529 (int)(1 << mp
->m_writeio_log
) >> 10);
531 if (mp
->m_logbufs
> 0)
532 seq_printf(m
, "," MNTOPT_LOGBUFS
"=%d", mp
->m_logbufs
);
533 if (mp
->m_logbsize
> 0)
534 seq_printf(m
, "," MNTOPT_LOGBSIZE
"=%dk", mp
->m_logbsize
>> 10);
537 seq_printf(m
, "," MNTOPT_LOGDEV
"=%s", mp
->m_logname
);
539 seq_printf(m
, "," MNTOPT_RTDEV
"=%s", mp
->m_rtname
);
541 if (mp
->m_dalign
> 0)
542 seq_printf(m
, "," MNTOPT_SUNIT
"=%d",
543 (int)XFS_FSB_TO_BB(mp
, mp
->m_dalign
));
544 if (mp
->m_swidth
> 0)
545 seq_printf(m
, "," MNTOPT_SWIDTH
"=%d",
546 (int)XFS_FSB_TO_BB(mp
, mp
->m_swidth
));
548 if (mp
->m_qflags
& (XFS_UQUOTA_ACCT
|XFS_UQUOTA_ENFD
))
549 seq_puts(m
, "," MNTOPT_USRQUOTA
);
550 else if (mp
->m_qflags
& XFS_UQUOTA_ACCT
)
551 seq_puts(m
, "," MNTOPT_UQUOTANOENF
);
553 if (mp
->m_qflags
& XFS_PQUOTA_ACCT
) {
554 if (mp
->m_qflags
& XFS_PQUOTA_ENFD
)
555 seq_puts(m
, "," MNTOPT_PRJQUOTA
);
557 seq_puts(m
, "," MNTOPT_PQUOTANOENF
);
559 if (mp
->m_qflags
& XFS_GQUOTA_ACCT
) {
560 if (mp
->m_qflags
& XFS_GQUOTA_ENFD
)
561 seq_puts(m
, "," MNTOPT_GRPQUOTA
);
563 seq_puts(m
, "," MNTOPT_GQUOTANOENF
);
566 if (!(mp
->m_qflags
& XFS_ALL_QUOTA_ACCT
))
567 seq_puts(m
, "," MNTOPT_NOQUOTA
);
573 unsigned int blockshift
)
575 unsigned int pagefactor
= 1;
576 unsigned int bitshift
= BITS_PER_LONG
- 1;
578 /* Figure out maximum filesize, on Linux this can depend on
579 * the filesystem blocksize (on 32 bit platforms).
580 * __block_write_begin does this in an [unsigned] long...
581 * page->index << (PAGE_CACHE_SHIFT - bbits)
582 * So, for page sized blocks (4K on 32 bit platforms),
583 * this wraps at around 8Tb (hence MAX_LFS_FILESIZE which is
584 * (((u64)PAGE_CACHE_SIZE << (BITS_PER_LONG-1))-1)
585 * but for smaller blocksizes it is less (bbits = log2 bsize).
586 * Note1: get_block_t takes a long (implicit cast from above)
587 * Note2: The Large Block Device (LBD and HAVE_SECTOR_T) patch
588 * can optionally convert the [unsigned] long from above into
589 * an [unsigned] long long.
592 #if BITS_PER_LONG == 32
593 # if defined(CONFIG_LBDAF)
594 ASSERT(sizeof(sector_t
) == 8);
595 pagefactor
= PAGE_CACHE_SIZE
;
596 bitshift
= BITS_PER_LONG
;
598 pagefactor
= PAGE_CACHE_SIZE
>> (PAGE_CACHE_SHIFT
- blockshift
);
602 return (((__uint64_t
)pagefactor
) << bitshift
) - 1;
606 xfs_set_inode32(struct xfs_mount
*mp
)
608 xfs_agnumber_t index
= 0;
609 xfs_agnumber_t maxagi
= 0;
610 xfs_sb_t
*sbp
= &mp
->m_sb
;
611 xfs_agnumber_t max_metadata
;
612 xfs_agino_t agino
= XFS_OFFBNO_TO_AGINO(mp
, sbp
->sb_agblocks
-1, 0);
613 xfs_ino_t ino
= XFS_AGINO_TO_INO(mp
, sbp
->sb_agcount
-1, agino
);
616 /* Calculate how much should be reserved for inodes to meet
617 * the max inode percentage.
619 if (mp
->m_maxicount
) {
622 icount
= sbp
->sb_dblocks
* sbp
->sb_imax_pct
;
624 icount
+= sbp
->sb_agblocks
- 1;
625 do_div(icount
, sbp
->sb_agblocks
);
626 max_metadata
= icount
;
628 max_metadata
= sbp
->sb_agcount
;
631 for (index
= 0; index
< sbp
->sb_agcount
; index
++) {
632 ino
= XFS_AGINO_TO_INO(mp
, index
, agino
);
634 if (ino
> XFS_MAXINUMBER_32
) {
635 pag
= xfs_perag_get(mp
, index
);
636 pag
->pagi_inodeok
= 0;
637 pag
->pagf_metadata
= 0;
642 pag
= xfs_perag_get(mp
, index
);
643 pag
->pagi_inodeok
= 1;
645 if (index
< max_metadata
)
646 pag
->pagf_metadata
= 1;
649 mp
->m_flags
|= (XFS_MOUNT_32BITINODES
|
650 XFS_MOUNT_SMALL_INUMS
);
656 xfs_set_inode64(struct xfs_mount
*mp
)
658 xfs_agnumber_t index
= 0;
660 for (index
= 0; index
< mp
->m_sb
.sb_agcount
; index
++) {
661 struct xfs_perag
*pag
;
663 pag
= xfs_perag_get(mp
, index
);
664 pag
->pagi_inodeok
= 1;
665 pag
->pagf_metadata
= 0;
669 /* There is no need for lock protection on m_flags,
670 * the rw_semaphore of the VFS superblock is locked
671 * during mount/umount/remount operations, so this is
672 * enough to avoid concurency on the m_flags field
674 mp
->m_flags
&= ~(XFS_MOUNT_32BITINODES
|
675 XFS_MOUNT_SMALL_INUMS
);
683 struct block_device
**bdevp
)
687 *bdevp
= blkdev_get_by_path(name
, FMODE_READ
|FMODE_WRITE
|FMODE_EXCL
,
689 if (IS_ERR(*bdevp
)) {
690 error
= PTR_ERR(*bdevp
);
691 xfs_warn(mp
, "Invalid device [%s], error=%d\n", name
, error
);
699 struct block_device
*bdev
)
702 blkdev_put(bdev
, FMODE_READ
|FMODE_WRITE
|FMODE_EXCL
);
706 xfs_blkdev_issue_flush(
707 xfs_buftarg_t
*buftarg
)
709 blkdev_issue_flush(buftarg
->bt_bdev
, GFP_NOFS
, NULL
);
714 struct xfs_mount
*mp
)
716 if (mp
->m_logdev_targp
&& mp
->m_logdev_targp
!= mp
->m_ddev_targp
) {
717 struct block_device
*logdev
= mp
->m_logdev_targp
->bt_bdev
;
718 xfs_free_buftarg(mp
, mp
->m_logdev_targp
);
719 xfs_blkdev_put(logdev
);
721 if (mp
->m_rtdev_targp
) {
722 struct block_device
*rtdev
= mp
->m_rtdev_targp
->bt_bdev
;
723 xfs_free_buftarg(mp
, mp
->m_rtdev_targp
);
724 xfs_blkdev_put(rtdev
);
726 xfs_free_buftarg(mp
, mp
->m_ddev_targp
);
730 * The file system configurations are:
731 * (1) device (partition) with data and internal log
732 * (2) logical volume with data and log subvolumes.
733 * (3) logical volume with data, log, and realtime subvolumes.
735 * We only have to handle opening the log and realtime volumes here if
736 * they are present. The data subvolume has already been opened by
737 * get_sb_bdev() and is stored in sb->s_bdev.
741 struct xfs_mount
*mp
)
743 struct block_device
*ddev
= mp
->m_super
->s_bdev
;
744 struct block_device
*logdev
= NULL
, *rtdev
= NULL
;
748 * Open real time and log devices - order is important.
751 error
= xfs_blkdev_get(mp
, mp
->m_logname
, &logdev
);
757 error
= xfs_blkdev_get(mp
, mp
->m_rtname
, &rtdev
);
759 goto out_close_logdev
;
761 if (rtdev
== ddev
|| rtdev
== logdev
) {
763 "Cannot mount filesystem with identical rtdev and ddev/logdev.");
765 goto out_close_rtdev
;
770 * Setup xfs_mount buffer target pointers
773 mp
->m_ddev_targp
= xfs_alloc_buftarg(mp
, ddev
, 0, mp
->m_fsname
);
774 if (!mp
->m_ddev_targp
)
775 goto out_close_rtdev
;
778 mp
->m_rtdev_targp
= xfs_alloc_buftarg(mp
, rtdev
, 1,
780 if (!mp
->m_rtdev_targp
)
781 goto out_free_ddev_targ
;
784 if (logdev
&& logdev
!= ddev
) {
785 mp
->m_logdev_targp
= xfs_alloc_buftarg(mp
, logdev
, 1,
787 if (!mp
->m_logdev_targp
)
788 goto out_free_rtdev_targ
;
790 mp
->m_logdev_targp
= mp
->m_ddev_targp
;
796 if (mp
->m_rtdev_targp
)
797 xfs_free_buftarg(mp
, mp
->m_rtdev_targp
);
799 xfs_free_buftarg(mp
, mp
->m_ddev_targp
);
802 xfs_blkdev_put(rtdev
);
804 if (logdev
&& logdev
!= ddev
)
805 xfs_blkdev_put(logdev
);
811 * Setup xfs_mount buffer target pointers based on superblock
815 struct xfs_mount
*mp
)
819 error
= xfs_setsize_buftarg(mp
->m_ddev_targp
, mp
->m_sb
.sb_blocksize
,
820 mp
->m_sb
.sb_sectsize
);
824 if (mp
->m_logdev_targp
&& mp
->m_logdev_targp
!= mp
->m_ddev_targp
) {
825 unsigned int log_sector_size
= BBSIZE
;
827 if (xfs_sb_version_hassector(&mp
->m_sb
))
828 log_sector_size
= mp
->m_sb
.sb_logsectsize
;
829 error
= xfs_setsize_buftarg(mp
->m_logdev_targp
,
830 mp
->m_sb
.sb_blocksize
,
835 if (mp
->m_rtdev_targp
) {
836 error
= xfs_setsize_buftarg(mp
->m_rtdev_targp
,
837 mp
->m_sb
.sb_blocksize
,
838 mp
->m_sb
.sb_sectsize
);
847 xfs_init_mount_workqueues(
848 struct xfs_mount
*mp
)
850 mp
->m_data_workqueue
= alloc_workqueue("xfs-data/%s",
851 WQ_MEM_RECLAIM
, 0, mp
->m_fsname
);
852 if (!mp
->m_data_workqueue
)
855 mp
->m_unwritten_workqueue
= alloc_workqueue("xfs-conv/%s",
856 WQ_MEM_RECLAIM
, 0, mp
->m_fsname
);
857 if (!mp
->m_unwritten_workqueue
)
858 goto out_destroy_data_iodone_queue
;
860 mp
->m_cil_workqueue
= alloc_workqueue("xfs-cil/%s",
861 WQ_MEM_RECLAIM
, 0, mp
->m_fsname
);
862 if (!mp
->m_cil_workqueue
)
863 goto out_destroy_unwritten
;
865 mp
->m_reclaim_workqueue
= alloc_workqueue("xfs-reclaim/%s",
867 if (!mp
->m_reclaim_workqueue
)
868 goto out_destroy_cil
;
870 mp
->m_log_workqueue
= alloc_workqueue("xfs-log/%s",
872 if (!mp
->m_log_workqueue
)
873 goto out_destroy_reclaim
;
875 mp
->m_eofblocks_workqueue
= alloc_workqueue("xfs-eofblocks/%s",
877 if (!mp
->m_eofblocks_workqueue
)
878 goto out_destroy_log
;
883 destroy_workqueue(mp
->m_log_workqueue
);
885 destroy_workqueue(mp
->m_reclaim_workqueue
);
887 destroy_workqueue(mp
->m_cil_workqueue
);
888 out_destroy_unwritten
:
889 destroy_workqueue(mp
->m_unwritten_workqueue
);
890 out_destroy_data_iodone_queue
:
891 destroy_workqueue(mp
->m_data_workqueue
);
897 xfs_destroy_mount_workqueues(
898 struct xfs_mount
*mp
)
900 destroy_workqueue(mp
->m_eofblocks_workqueue
);
901 destroy_workqueue(mp
->m_log_workqueue
);
902 destroy_workqueue(mp
->m_reclaim_workqueue
);
903 destroy_workqueue(mp
->m_cil_workqueue
);
904 destroy_workqueue(mp
->m_data_workqueue
);
905 destroy_workqueue(mp
->m_unwritten_workqueue
);
909 * Flush all dirty data to disk. Must not be called while holding an XFS_ILOCK
910 * or a page lock. We use sync_inodes_sb() here to ensure we block while waiting
911 * for IO to complete so that we effectively throttle multiple callers to the
912 * rate at which IO is completing.
916 struct xfs_mount
*mp
)
918 struct super_block
*sb
= mp
->m_super
;
920 if (down_read_trylock(&sb
->s_umount
)) {
922 up_read(&sb
->s_umount
);
926 /* Catch misguided souls that try to use this interface on XFS */
927 STATIC
struct inode
*
929 struct super_block
*sb
)
936 * Now that the generic code is guaranteed not to be accessing
937 * the linux inode, we can reclaim the inode.
940 xfs_fs_destroy_inode(
943 struct xfs_inode
*ip
= XFS_I(inode
);
945 trace_xfs_destroy_inode(ip
);
947 XFS_STATS_INC(vn_reclaim
);
949 ASSERT(XFS_FORCED_SHUTDOWN(ip
->i_mount
) || ip
->i_delayed_blks
== 0);
952 * We should never get here with one of the reclaim flags already set.
954 ASSERT_ALWAYS(!xfs_iflags_test(ip
, XFS_IRECLAIMABLE
));
955 ASSERT_ALWAYS(!xfs_iflags_test(ip
, XFS_IRECLAIM
));
958 * We always use background reclaim here because even if the
959 * inode is clean, it still may be under IO and hence we have
960 * to take the flush lock. The background reclaim path handles
961 * this more efficiently than we can here, so simply let background
962 * reclaim tear down all inodes.
964 xfs_inode_set_reclaim_tag(ip
);
968 * Slab object creation initialisation for the XFS inode.
969 * This covers only the idempotent fields in the XFS inode;
970 * all other fields need to be initialised on allocation
971 * from the slab. This avoids the need to repeatedly initialise
972 * fields in the xfs inode that left in the initialise state
973 * when freeing the inode.
976 xfs_fs_inode_init_once(
979 struct xfs_inode
*ip
= inode
;
981 memset(ip
, 0, sizeof(struct xfs_inode
));
984 inode_init_once(VFS_I(ip
));
987 atomic_set(&ip
->i_pincount
, 0);
988 spin_lock_init(&ip
->i_flags_lock
);
990 mrlock_init(&ip
->i_lock
, MRLOCK_ALLOW_EQUAL_PRI
|MRLOCK_BARRIER
,
991 "xfsino", ip
->i_ino
);
998 xfs_inode_t
*ip
= XFS_I(inode
);
1000 ASSERT(!rwsem_is_locked(&ip
->i_iolock
.mr_lock
));
1002 trace_xfs_evict_inode(ip
);
1004 truncate_inode_pages(&inode
->i_data
, 0);
1006 XFS_STATS_INC(vn_rele
);
1007 XFS_STATS_INC(vn_remove
);
1008 XFS_STATS_DEC(vn_active
);
1014 * We do an unlocked check for XFS_IDONTCACHE here because we are already
1015 * serialised against cache hits here via the inode->i_lock and igrab() in
1016 * xfs_iget_cache_hit(). Hence a lookup that might clear this flag will not be
1017 * racing with us, and it avoids needing to grab a spinlock here for every inode
1018 * we drop the final reference on.
1022 struct inode
*inode
)
1024 struct xfs_inode
*ip
= XFS_I(inode
);
1026 return generic_drop_inode(inode
) || (ip
->i_flags
& XFS_IDONTCACHE
);
1031 struct xfs_mount
*mp
)
1033 kfree(mp
->m_fsname
);
1034 kfree(mp
->m_rtname
);
1035 kfree(mp
->m_logname
);
1040 struct super_block
*sb
)
1042 struct xfs_mount
*mp
= XFS_M(sb
);
1044 xfs_filestream_unmount(mp
);
1048 xfs_icsb_destroy_counters(mp
);
1049 xfs_destroy_mount_workqueues(mp
);
1050 xfs_close_devices(mp
);
1051 xfs_free_fsname(mp
);
1057 struct super_block
*sb
,
1060 struct xfs_mount
*mp
= XFS_M(sb
);
1063 * Doing anything during the async pass would be counterproductive.
1068 xfs_log_force(mp
, XFS_LOG_SYNC
);
1071 * The disk must be active because we're syncing.
1072 * We schedule log work now (now that the disk is
1073 * active) instead of later (when it might not be).
1075 flush_delayed_work(&mp
->m_log
->l_work
);
1083 struct dentry
*dentry
,
1084 struct kstatfs
*statp
)
1086 struct xfs_mount
*mp
= XFS_M(dentry
->d_sb
);
1087 xfs_sb_t
*sbp
= &mp
->m_sb
;
1088 struct xfs_inode
*ip
= XFS_I(dentry
->d_inode
);
1089 __uint64_t fakeinos
, id
;
1093 statp
->f_type
= XFS_SB_MAGIC
;
1094 statp
->f_namelen
= MAXNAMELEN
- 1;
1096 id
= huge_encode_dev(mp
->m_ddev_targp
->bt_dev
);
1097 statp
->f_fsid
.val
[0] = (u32
)id
;
1098 statp
->f_fsid
.val
[1] = (u32
)(id
>> 32);
1100 xfs_icsb_sync_counters(mp
, XFS_ICSB_LAZY_COUNT
);
1102 spin_lock(&mp
->m_sb_lock
);
1103 statp
->f_bsize
= sbp
->sb_blocksize
;
1104 lsize
= sbp
->sb_logstart
? sbp
->sb_logblocks
: 0;
1105 statp
->f_blocks
= sbp
->sb_dblocks
- lsize
;
1106 statp
->f_bfree
= statp
->f_bavail
=
1107 sbp
->sb_fdblocks
- XFS_ALLOC_SET_ASIDE(mp
);
1108 fakeinos
= statp
->f_bfree
<< sbp
->sb_inopblog
;
1110 MIN(sbp
->sb_icount
+ fakeinos
, (__uint64_t
)XFS_MAXINUMBER
);
1111 if (mp
->m_maxicount
)
1112 statp
->f_files
= min_t(typeof(statp
->f_files
),
1116 /* make sure statp->f_ffree does not underflow */
1117 ffree
= statp
->f_files
- (sbp
->sb_icount
- sbp
->sb_ifree
);
1118 statp
->f_ffree
= max_t(__int64_t
, ffree
, 0);
1120 spin_unlock(&mp
->m_sb_lock
);
1122 if ((ip
->i_d
.di_flags
& XFS_DIFLAG_PROJINHERIT
) &&
1123 ((mp
->m_qflags
& (XFS_PQUOTA_ACCT
|XFS_PQUOTA_ENFD
))) ==
1124 (XFS_PQUOTA_ACCT
|XFS_PQUOTA_ENFD
))
1125 xfs_qm_statvfs(ip
, statp
);
1130 xfs_save_resvblks(struct xfs_mount
*mp
)
1132 __uint64_t resblks
= 0;
1134 mp
->m_resblks_save
= mp
->m_resblks
;
1135 xfs_reserve_blocks(mp
, &resblks
, NULL
);
1139 xfs_restore_resvblks(struct xfs_mount
*mp
)
1143 if (mp
->m_resblks_save
) {
1144 resblks
= mp
->m_resblks_save
;
1145 mp
->m_resblks_save
= 0;
1147 resblks
= xfs_default_resblks(mp
);
1149 xfs_reserve_blocks(mp
, &resblks
, NULL
);
1153 * Trigger writeback of all the dirty metadata in the file system.
1155 * This ensures that the metadata is written to their location on disk rather
1156 * than just existing in transactions in the log. This means after a quiesce
1157 * there is no log replay required to write the inodes to disk - this is the
1158 * primary difference between a sync and a quiesce.
1160 * Note: xfs_log_quiesce() stops background log work - the callers must ensure
1161 * it is started again when appropriate.
1165 struct xfs_mount
*mp
)
1169 /* wait for all modifications to complete */
1170 while (atomic_read(&mp
->m_active_trans
) > 0)
1173 /* force the log to unpin objects from the now complete transactions */
1174 xfs_log_force(mp
, XFS_LOG_SYNC
);
1176 /* reclaim inodes to do any IO before the freeze completes */
1177 xfs_reclaim_inodes(mp
, 0);
1178 xfs_reclaim_inodes(mp
, SYNC_WAIT
);
1180 /* Push the superblock and write an unmount record */
1181 error
= xfs_log_sbcount(mp
);
1183 xfs_warn(mp
, "xfs_attr_quiesce: failed to log sb changes. "
1184 "Frozen image may not be consistent.");
1186 * Just warn here till VFS can correctly support
1187 * read-only remount without racing.
1189 WARN_ON(atomic_read(&mp
->m_active_trans
) != 0);
1191 xfs_log_quiesce(mp
);
1196 struct super_block
*sb
,
1200 struct xfs_mount
*mp
= XFS_M(sb
);
1201 substring_t args
[MAX_OPT_ARGS
];
1205 while ((p
= strsep(&options
, ",")) != NULL
) {
1211 token
= match_token(p
, tokens
, args
);
1214 mp
->m_flags
|= XFS_MOUNT_BARRIER
;
1217 mp
->m_flags
&= ~XFS_MOUNT_BARRIER
;
1220 mp
->m_maxagi
= xfs_set_inode64(mp
);
1223 mp
->m_maxagi
= xfs_set_inode32(mp
);
1227 * Logically we would return an error here to prevent
1228 * users from believing they might have changed
1229 * mount options using remount which can't be changed.
1231 * But unfortunately mount(8) adds all options from
1232 * mtab and fstab to the mount arguments in some cases
1233 * so we can't blindly reject options, but have to
1234 * check for each specified option if it actually
1235 * differs from the currently set option and only
1236 * reject it if that's the case.
1238 * Until that is implemented we return success for
1239 * every remount request, and silently ignore all
1240 * options that we can't actually change.
1244 "mount option \"%s\" not supported for remount", p
);
1253 if ((mp
->m_flags
& XFS_MOUNT_RDONLY
) && !(*flags
& MS_RDONLY
)) {
1254 mp
->m_flags
&= ~XFS_MOUNT_RDONLY
;
1257 * If this is the first remount to writeable state we
1258 * might have some superblock changes to update.
1260 if (mp
->m_update_flags
) {
1261 error
= xfs_mount_log_sb(mp
, mp
->m_update_flags
);
1263 xfs_warn(mp
, "failed to write sb changes");
1266 mp
->m_update_flags
= 0;
1270 * Fill out the reserve pool if it is empty. Use the stashed
1271 * value if it is non-zero, otherwise go with the default.
1273 xfs_restore_resvblks(mp
);
1274 xfs_log_work_queue(mp
);
1278 if (!(mp
->m_flags
& XFS_MOUNT_RDONLY
) && (*flags
& MS_RDONLY
)) {
1280 * Before we sync the metadata, we need to free up the reserve
1281 * block pool so that the used block count in the superblock on
1282 * disk is correct at the end of the remount. Stash the current
1283 * reserve pool size so that if we get remounted rw, we can
1284 * return it to the same size.
1286 xfs_save_resvblks(mp
);
1287 xfs_quiesce_attr(mp
);
1288 mp
->m_flags
|= XFS_MOUNT_RDONLY
;
1295 * Second stage of a freeze. The data is already frozen so we only
1296 * need to take care of the metadata. Once that's done write a dummy
1297 * record to dirty the log in case of a crash while frozen.
1301 struct super_block
*sb
)
1303 struct xfs_mount
*mp
= XFS_M(sb
);
1305 xfs_save_resvblks(mp
);
1306 xfs_quiesce_attr(mp
);
1307 return -xfs_fs_log_dummy(mp
);
1312 struct super_block
*sb
)
1314 struct xfs_mount
*mp
= XFS_M(sb
);
1316 xfs_restore_resvblks(mp
);
1317 xfs_log_work_queue(mp
);
1322 xfs_fs_show_options(
1324 struct dentry
*root
)
1326 return -xfs_showargs(XFS_M(root
->d_sb
), m
);
1330 * This function fills in xfs_mount_t fields based on mount args.
1331 * Note: the superblock _has_ now been read in.
1335 struct xfs_mount
*mp
)
1337 int ronly
= (mp
->m_flags
& XFS_MOUNT_RDONLY
);
1339 /* Fail a mount where the logbuf is smaller than the log stripe */
1340 if (xfs_sb_version_haslogv2(&mp
->m_sb
)) {
1341 if (mp
->m_logbsize
<= 0 &&
1342 mp
->m_sb
.sb_logsunit
> XLOG_BIG_RECORD_BSIZE
) {
1343 mp
->m_logbsize
= mp
->m_sb
.sb_logsunit
;
1344 } else if (mp
->m_logbsize
> 0 &&
1345 mp
->m_logbsize
< mp
->m_sb
.sb_logsunit
) {
1347 "logbuf size must be greater than or equal to log stripe size");
1348 return XFS_ERROR(EINVAL
);
1351 /* Fail a mount if the logbuf is larger than 32K */
1352 if (mp
->m_logbsize
> XLOG_BIG_RECORD_BSIZE
) {
1354 "logbuf size for version 1 logs must be 16K or 32K");
1355 return XFS_ERROR(EINVAL
);
1360 * V5 filesystems always use attr2 format for attributes.
1362 if (xfs_sb_version_hascrc(&mp
->m_sb
) &&
1363 (mp
->m_flags
& XFS_MOUNT_NOATTR2
)) {
1365 "Cannot mount a V5 filesystem as %s. %s is always enabled for V5 filesystems.",
1366 MNTOPT_NOATTR2
, MNTOPT_ATTR2
);
1367 return XFS_ERROR(EINVAL
);
1371 * mkfs'ed attr2 will turn on attr2 mount unless explicitly
1372 * told by noattr2 to turn it off
1374 if (xfs_sb_version_hasattr2(&mp
->m_sb
) &&
1375 !(mp
->m_flags
& XFS_MOUNT_NOATTR2
))
1376 mp
->m_flags
|= XFS_MOUNT_ATTR2
;
1379 * prohibit r/w mounts of read-only filesystems
1381 if ((mp
->m_sb
.sb_flags
& XFS_SBF_READONLY
) && !ronly
) {
1383 "cannot mount a read-only filesystem as read-write");
1384 return XFS_ERROR(EROFS
);
1387 if ((mp
->m_qflags
& (XFS_GQUOTA_ACCT
| XFS_GQUOTA_ACTIVE
)) &&
1388 (mp
->m_qflags
& (XFS_PQUOTA_ACCT
| XFS_PQUOTA_ACTIVE
)) &&
1389 !xfs_sb_version_has_pquotino(&mp
->m_sb
)) {
1391 "Super block does not support project and group quota together");
1392 return XFS_ERROR(EINVAL
);
1400 struct super_block
*sb
,
1405 struct xfs_mount
*mp
= NULL
;
1406 int flags
= 0, error
= ENOMEM
;
1408 mp
= kzalloc(sizeof(struct xfs_mount
), GFP_KERNEL
);
1412 spin_lock_init(&mp
->m_sb_lock
);
1413 mutex_init(&mp
->m_growlock
);
1414 atomic_set(&mp
->m_active_trans
, 0);
1415 INIT_DELAYED_WORK(&mp
->m_reclaim_work
, xfs_reclaim_worker
);
1416 INIT_DELAYED_WORK(&mp
->m_eofblocks_work
, xfs_eofblocks_worker
);
1421 error
= xfs_parseargs(mp
, (char *)data
);
1423 goto out_free_fsname
;
1425 sb_min_blocksize(sb
, BBSIZE
);
1426 sb
->s_xattr
= xfs_xattr_handlers
;
1427 sb
->s_export_op
= &xfs_export_operations
;
1428 #ifdef CONFIG_XFS_QUOTA
1429 sb
->s_qcop
= &xfs_quotactl_operations
;
1431 sb
->s_op
= &xfs_super_operations
;
1434 flags
|= XFS_MFSI_QUIET
;
1436 error
= xfs_open_devices(mp
);
1438 goto out_free_fsname
;
1440 error
= xfs_init_mount_workqueues(mp
);
1442 goto out_close_devices
;
1444 error
= xfs_icsb_init_counters(mp
);
1446 goto out_destroy_workqueues
;
1448 error
= xfs_readsb(mp
, flags
);
1450 goto out_destroy_counters
;
1452 error
= xfs_finish_flags(mp
);
1456 error
= xfs_setup_devices(mp
);
1460 error
= xfs_filestream_mount(mp
);
1465 * we must configure the block size in the superblock before we run the
1466 * full mount process as the mount process can lookup and cache inodes.
1468 sb
->s_magic
= XFS_SB_MAGIC
;
1469 sb
->s_blocksize
= mp
->m_sb
.sb_blocksize
;
1470 sb
->s_blocksize_bits
= ffs(sb
->s_blocksize
) - 1;
1471 sb
->s_maxbytes
= xfs_max_file_offset(sb
->s_blocksize_bits
);
1472 sb
->s_max_links
= XFS_MAXLINK
;
1473 sb
->s_time_gran
= 1;
1474 set_posix_acl_flag(sb
);
1476 /* version 5 superblocks support inode version counters. */
1477 if (XFS_SB_VERSION_NUM(&mp
->m_sb
) == XFS_SB_VERSION_5
)
1478 sb
->s_flags
|= MS_I_VERSION
;
1480 error
= xfs_mountfs(mp
);
1482 goto out_filestream_unmount
;
1484 root
= igrab(VFS_I(mp
->m_rootip
));
1489 sb
->s_root
= d_make_root(root
);
1497 out_filestream_unmount
:
1498 xfs_filestream_unmount(mp
);
1501 out_destroy_counters
:
1502 xfs_icsb_destroy_counters(mp
);
1503 out_destroy_workqueues
:
1504 xfs_destroy_mount_workqueues(mp
);
1506 xfs_close_devices(mp
);
1508 xfs_free_fsname(mp
);
1514 xfs_filestream_unmount(mp
);
1519 STATIC
struct dentry
*
1521 struct file_system_type
*fs_type
,
1523 const char *dev_name
,
1526 return mount_bdev(fs_type
, flags
, dev_name
, data
, xfs_fs_fill_super
);
1530 xfs_fs_nr_cached_objects(
1531 struct super_block
*sb
,
1534 return xfs_reclaim_inodes_count(XFS_M(sb
));
1538 xfs_fs_free_cached_objects(
1539 struct super_block
*sb
,
1543 return xfs_reclaim_inodes_nr(XFS_M(sb
), nr_to_scan
);
1546 static const struct super_operations xfs_super_operations
= {
1547 .alloc_inode
= xfs_fs_alloc_inode
,
1548 .destroy_inode
= xfs_fs_destroy_inode
,
1549 .evict_inode
= xfs_fs_evict_inode
,
1550 .drop_inode
= xfs_fs_drop_inode
,
1551 .put_super
= xfs_fs_put_super
,
1552 .sync_fs
= xfs_fs_sync_fs
,
1553 .freeze_fs
= xfs_fs_freeze
,
1554 .unfreeze_fs
= xfs_fs_unfreeze
,
1555 .statfs
= xfs_fs_statfs
,
1556 .remount_fs
= xfs_fs_remount
,
1557 .show_options
= xfs_fs_show_options
,
1558 .nr_cached_objects
= xfs_fs_nr_cached_objects
,
1559 .free_cached_objects
= xfs_fs_free_cached_objects
,
1562 static struct file_system_type xfs_fs_type
= {
1563 .owner
= THIS_MODULE
,
1565 .mount
= xfs_fs_mount
,
1566 .kill_sb
= kill_block_super
,
1567 .fs_flags
= FS_REQUIRES_DEV
,
1569 MODULE_ALIAS_FS("xfs");
1572 xfs_init_zones(void)
1575 xfs_ioend_zone
= kmem_zone_init(sizeof(xfs_ioend_t
), "xfs_ioend");
1576 if (!xfs_ioend_zone
)
1579 xfs_ioend_pool
= mempool_create_slab_pool(4 * MAX_BUF_PER_PAGE
,
1581 if (!xfs_ioend_pool
)
1582 goto out_destroy_ioend_zone
;
1584 xfs_log_ticket_zone
= kmem_zone_init(sizeof(xlog_ticket_t
),
1586 if (!xfs_log_ticket_zone
)
1587 goto out_destroy_ioend_pool
;
1589 xfs_bmap_free_item_zone
= kmem_zone_init(sizeof(xfs_bmap_free_item_t
),
1590 "xfs_bmap_free_item");
1591 if (!xfs_bmap_free_item_zone
)
1592 goto out_destroy_log_ticket_zone
;
1594 xfs_btree_cur_zone
= kmem_zone_init(sizeof(xfs_btree_cur_t
),
1596 if (!xfs_btree_cur_zone
)
1597 goto out_destroy_bmap_free_item_zone
;
1599 xfs_da_state_zone
= kmem_zone_init(sizeof(xfs_da_state_t
),
1601 if (!xfs_da_state_zone
)
1602 goto out_destroy_btree_cur_zone
;
1604 xfs_ifork_zone
= kmem_zone_init(sizeof(xfs_ifork_t
), "xfs_ifork");
1605 if (!xfs_ifork_zone
)
1606 goto out_destroy_da_state_zone
;
1608 xfs_trans_zone
= kmem_zone_init(sizeof(xfs_trans_t
), "xfs_trans");
1609 if (!xfs_trans_zone
)
1610 goto out_destroy_ifork_zone
;
1612 xfs_log_item_desc_zone
=
1613 kmem_zone_init(sizeof(struct xfs_log_item_desc
),
1614 "xfs_log_item_desc");
1615 if (!xfs_log_item_desc_zone
)
1616 goto out_destroy_trans_zone
;
1619 * The size of the zone allocated buf log item is the maximum
1620 * size possible under XFS. This wastes a little bit of memory,
1621 * but it is much faster.
1623 xfs_buf_item_zone
= kmem_zone_init(sizeof(struct xfs_buf_log_item
),
1625 if (!xfs_buf_item_zone
)
1626 goto out_destroy_log_item_desc_zone
;
1628 xfs_efd_zone
= kmem_zone_init((sizeof(xfs_efd_log_item_t
) +
1629 ((XFS_EFD_MAX_FAST_EXTENTS
- 1) *
1630 sizeof(xfs_extent_t
))), "xfs_efd_item");
1632 goto out_destroy_buf_item_zone
;
1634 xfs_efi_zone
= kmem_zone_init((sizeof(xfs_efi_log_item_t
) +
1635 ((XFS_EFI_MAX_FAST_EXTENTS
- 1) *
1636 sizeof(xfs_extent_t
))), "xfs_efi_item");
1638 goto out_destroy_efd_zone
;
1641 kmem_zone_init_flags(sizeof(xfs_inode_t
), "xfs_inode",
1642 KM_ZONE_HWALIGN
| KM_ZONE_RECLAIM
| KM_ZONE_SPREAD
,
1643 xfs_fs_inode_init_once
);
1644 if (!xfs_inode_zone
)
1645 goto out_destroy_efi_zone
;
1648 kmem_zone_init_flags(sizeof(xfs_inode_log_item_t
), "xfs_ili",
1649 KM_ZONE_SPREAD
, NULL
);
1651 goto out_destroy_inode_zone
;
1652 xfs_icreate_zone
= kmem_zone_init(sizeof(struct xfs_icreate_item
),
1654 if (!xfs_icreate_zone
)
1655 goto out_destroy_ili_zone
;
1659 out_destroy_ili_zone
:
1660 kmem_zone_destroy(xfs_ili_zone
);
1661 out_destroy_inode_zone
:
1662 kmem_zone_destroy(xfs_inode_zone
);
1663 out_destroy_efi_zone
:
1664 kmem_zone_destroy(xfs_efi_zone
);
1665 out_destroy_efd_zone
:
1666 kmem_zone_destroy(xfs_efd_zone
);
1667 out_destroy_buf_item_zone
:
1668 kmem_zone_destroy(xfs_buf_item_zone
);
1669 out_destroy_log_item_desc_zone
:
1670 kmem_zone_destroy(xfs_log_item_desc_zone
);
1671 out_destroy_trans_zone
:
1672 kmem_zone_destroy(xfs_trans_zone
);
1673 out_destroy_ifork_zone
:
1674 kmem_zone_destroy(xfs_ifork_zone
);
1675 out_destroy_da_state_zone
:
1676 kmem_zone_destroy(xfs_da_state_zone
);
1677 out_destroy_btree_cur_zone
:
1678 kmem_zone_destroy(xfs_btree_cur_zone
);
1679 out_destroy_bmap_free_item_zone
:
1680 kmem_zone_destroy(xfs_bmap_free_item_zone
);
1681 out_destroy_log_ticket_zone
:
1682 kmem_zone_destroy(xfs_log_ticket_zone
);
1683 out_destroy_ioend_pool
:
1684 mempool_destroy(xfs_ioend_pool
);
1685 out_destroy_ioend_zone
:
1686 kmem_zone_destroy(xfs_ioend_zone
);
1692 xfs_destroy_zones(void)
1695 * Make sure all delayed rcu free are flushed before we
1699 kmem_zone_destroy(xfs_icreate_zone
);
1700 kmem_zone_destroy(xfs_ili_zone
);
1701 kmem_zone_destroy(xfs_inode_zone
);
1702 kmem_zone_destroy(xfs_efi_zone
);
1703 kmem_zone_destroy(xfs_efd_zone
);
1704 kmem_zone_destroy(xfs_buf_item_zone
);
1705 kmem_zone_destroy(xfs_log_item_desc_zone
);
1706 kmem_zone_destroy(xfs_trans_zone
);
1707 kmem_zone_destroy(xfs_ifork_zone
);
1708 kmem_zone_destroy(xfs_da_state_zone
);
1709 kmem_zone_destroy(xfs_btree_cur_zone
);
1710 kmem_zone_destroy(xfs_bmap_free_item_zone
);
1711 kmem_zone_destroy(xfs_log_ticket_zone
);
1712 mempool_destroy(xfs_ioend_pool
);
1713 kmem_zone_destroy(xfs_ioend_zone
);
1718 xfs_init_workqueues(void)
1721 * The allocation workqueue can be used in memory reclaim situations
1722 * (writepage path), and parallelism is only limited by the number of
1723 * AGs in all the filesystems mounted. Hence use the default large
1724 * max_active value for this workqueue.
1726 xfs_alloc_wq
= alloc_workqueue("xfsalloc", WQ_MEM_RECLAIM
, 0);
1734 xfs_destroy_workqueues(void)
1736 destroy_workqueue(xfs_alloc_wq
);
1744 printk(KERN_INFO XFS_VERSION_STRING
" with "
1745 XFS_BUILD_OPTIONS
" enabled\n");
1749 error
= xfs_init_zones();
1753 error
= xfs_init_workqueues();
1755 goto out_destroy_zones
;
1757 error
= xfs_mru_cache_init();
1759 goto out_destroy_wq
;
1761 error
= xfs_filestream_init();
1763 goto out_mru_cache_uninit
;
1765 error
= xfs_buf_init();
1767 goto out_filestream_uninit
;
1769 error
= xfs_init_procfs();
1771 goto out_buf_terminate
;
1773 error
= xfs_sysctl_register();
1775 goto out_cleanup_procfs
;
1777 error
= xfs_qm_init();
1779 goto out_sysctl_unregister
;
1781 error
= register_filesystem(&xfs_fs_type
);
1788 out_sysctl_unregister
:
1789 xfs_sysctl_unregister();
1791 xfs_cleanup_procfs();
1793 xfs_buf_terminate();
1794 out_filestream_uninit
:
1795 xfs_filestream_uninit();
1796 out_mru_cache_uninit
:
1797 xfs_mru_cache_uninit();
1799 xfs_destroy_workqueues();
1801 xfs_destroy_zones();
1810 unregister_filesystem(&xfs_fs_type
);
1811 xfs_sysctl_unregister();
1812 xfs_cleanup_procfs();
1813 xfs_buf_terminate();
1814 xfs_filestream_uninit();
1815 xfs_mru_cache_uninit();
1816 xfs_destroy_workqueues();
1817 xfs_destroy_zones();
1820 module_init(init_xfs_fs
);
1821 module_exit(exit_xfs_fs
);
1823 MODULE_AUTHOR("Silicon Graphics, Inc.");
1824 MODULE_DESCRIPTION(XFS_VERSION_STRING
" with " XFS_BUILD_OPTIONS
" enabled");
1825 MODULE_LICENSE("GPL");