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_shared.h"
21 #include "xfs_format.h"
22 #include "xfs_log_format.h"
23 #include "xfs_trans_resv.h"
27 #include "xfs_mount.h"
28 #include "xfs_da_format.h"
29 #include "xfs_inode.h"
30 #include "xfs_btree.h"
32 #include "xfs_alloc.h"
33 #include "xfs_error.h"
34 #include "xfs_fsops.h"
35 #include "xfs_trans.h"
36 #include "xfs_buf_item.h"
38 #include "xfs_log_priv.h"
39 #include "xfs_da_btree.h"
41 #include "xfs_extfree_item.h"
42 #include "xfs_mru_cache.h"
43 #include "xfs_inode_item.h"
44 #include "xfs_icache.h"
45 #include "xfs_trace.h"
46 #include "xfs_icreate_item.h"
47 #include "xfs_dinode.h"
48 #include "xfs_filestream.h"
49 #include "xfs_quota.h"
51 #include <linux/namei.h>
52 #include <linux/init.h>
53 #include <linux/slab.h>
54 #include <linux/mount.h>
55 #include <linux/mempool.h>
56 #include <linux/writeback.h>
57 #include <linux/kthread.h>
58 #include <linux/freezer.h>
59 #include <linux/parser.h>
61 static const struct super_operations xfs_super_operations
;
62 static kmem_zone_t
*xfs_ioend_zone
;
63 mempool_t
*xfs_ioend_pool
;
64 struct kset
*xfs_kset
;
66 #define MNTOPT_LOGBUFS "logbufs" /* number of XFS log buffers */
67 #define MNTOPT_LOGBSIZE "logbsize" /* size of XFS log buffers */
68 #define MNTOPT_LOGDEV "logdev" /* log device */
69 #define MNTOPT_RTDEV "rtdev" /* realtime I/O device */
70 #define MNTOPT_BIOSIZE "biosize" /* log2 of preferred buffered io size */
71 #define MNTOPT_WSYNC "wsync" /* safe-mode nfs compatible mount */
72 #define MNTOPT_NOALIGN "noalign" /* turn off stripe alignment */
73 #define MNTOPT_SWALLOC "swalloc" /* turn on stripe width allocation */
74 #define MNTOPT_SUNIT "sunit" /* data volume stripe unit */
75 #define MNTOPT_SWIDTH "swidth" /* data volume stripe width */
76 #define MNTOPT_NOUUID "nouuid" /* ignore filesystem UUID */
77 #define MNTOPT_MTPT "mtpt" /* filesystem mount point */
78 #define MNTOPT_GRPID "grpid" /* group-ID from parent directory */
79 #define MNTOPT_NOGRPID "nogrpid" /* group-ID from current process */
80 #define MNTOPT_BSDGROUPS "bsdgroups" /* group-ID from parent directory */
81 #define MNTOPT_SYSVGROUPS "sysvgroups" /* group-ID from current process */
82 #define MNTOPT_ALLOCSIZE "allocsize" /* preferred allocation size */
83 #define MNTOPT_NORECOVERY "norecovery" /* don't run XFS recovery */
84 #define MNTOPT_BARRIER "barrier" /* use writer barriers for log write and
85 * unwritten extent conversion */
86 #define MNTOPT_NOBARRIER "nobarrier" /* .. disable */
87 #define MNTOPT_64BITINODE "inode64" /* inodes can be allocated anywhere */
88 #define MNTOPT_32BITINODE "inode32" /* inode allocation limited to
89 * XFS_MAXINUMBER_32 */
90 #define MNTOPT_IKEEP "ikeep" /* do not free empty inode clusters */
91 #define MNTOPT_NOIKEEP "noikeep" /* free empty inode clusters */
92 #define MNTOPT_LARGEIO "largeio" /* report large I/O sizes in stat() */
93 #define MNTOPT_NOLARGEIO "nolargeio" /* do not report large I/O sizes
95 #define MNTOPT_ATTR2 "attr2" /* do use attr2 attribute format */
96 #define MNTOPT_NOATTR2 "noattr2" /* do not use attr2 attribute format */
97 #define MNTOPT_FILESTREAM "filestreams" /* use filestreams allocator */
98 #define MNTOPT_QUOTA "quota" /* disk quotas (user) */
99 #define MNTOPT_NOQUOTA "noquota" /* no quotas */
100 #define MNTOPT_USRQUOTA "usrquota" /* user quota enabled */
101 #define MNTOPT_GRPQUOTA "grpquota" /* group quota enabled */
102 #define MNTOPT_PRJQUOTA "prjquota" /* project quota enabled */
103 #define MNTOPT_UQUOTA "uquota" /* user quota (IRIX variant) */
104 #define MNTOPT_GQUOTA "gquota" /* group quota (IRIX variant) */
105 #define MNTOPT_PQUOTA "pquota" /* project quota (IRIX variant) */
106 #define MNTOPT_UQUOTANOENF "uqnoenforce"/* user quota limit enforcement */
107 #define MNTOPT_GQUOTANOENF "gqnoenforce"/* group quota limit enforcement */
108 #define MNTOPT_PQUOTANOENF "pqnoenforce"/* project quota limit enforcement */
109 #define MNTOPT_QUOTANOENF "qnoenforce" /* same as uqnoenforce */
110 #define MNTOPT_DELAYLOG "delaylog" /* Delayed logging enabled */
111 #define MNTOPT_NODELAYLOG "nodelaylog" /* Delayed logging disabled */
112 #define MNTOPT_DISCARD "discard" /* Discard unused blocks */
113 #define MNTOPT_NODISCARD "nodiscard" /* Do not discard unused blocks */
116 * Table driven mount option parser.
118 * Currently only used for remount, but it will be used for mount
119 * in the future, too.
129 static const match_table_t tokens
= {
130 {Opt_barrier
, "barrier"},
131 {Opt_nobarrier
, "nobarrier"},
132 {Opt_inode64
, "inode64"},
133 {Opt_inode32
, "inode32"},
139 suffix_kstrtoint(char *s
, unsigned int base
, int *res
)
141 int last
, shift_left_factor
= 0, _res
;
144 last
= strlen(value
) - 1;
145 if (value
[last
] == 'K' || value
[last
] == 'k') {
146 shift_left_factor
= 10;
149 if (value
[last
] == 'M' || value
[last
] == 'm') {
150 shift_left_factor
= 20;
153 if (value
[last
] == 'G' || value
[last
] == 'g') {
154 shift_left_factor
= 30;
158 if (kstrtoint(s
, base
, &_res
))
160 *res
= _res
<< shift_left_factor
;
165 * This function fills in xfs_mount_t fields based on mount args.
166 * Note: the superblock has _not_ yet been read in.
168 * Note that this function leaks the various device name allocations on
169 * failure. The caller takes care of them.
173 struct xfs_mount
*mp
,
176 struct super_block
*sb
= mp
->m_super
;
177 char *this_char
, *value
;
181 __uint8_t iosizelog
= 0;
184 * set up the mount name first so all the errors will refer to the
187 mp
->m_fsname
= kstrndup(sb
->s_id
, MAXNAMELEN
, GFP_KERNEL
);
190 mp
->m_fsname_len
= strlen(mp
->m_fsname
) + 1;
193 * Copy binary VFS mount flags we are interested in.
195 if (sb
->s_flags
& MS_RDONLY
)
196 mp
->m_flags
|= XFS_MOUNT_RDONLY
;
197 if (sb
->s_flags
& MS_DIRSYNC
)
198 mp
->m_flags
|= XFS_MOUNT_DIRSYNC
;
199 if (sb
->s_flags
& MS_SYNCHRONOUS
)
200 mp
->m_flags
|= XFS_MOUNT_WSYNC
;
203 * Set some default flags that could be cleared by the mount option
206 mp
->m_flags
|= XFS_MOUNT_BARRIER
;
207 mp
->m_flags
|= XFS_MOUNT_COMPAT_IOSIZE
;
210 * These can be overridden by the mount option parsing.
218 while ((this_char
= strsep(&options
, ",")) != NULL
) {
221 if ((value
= strchr(this_char
, '=')) != NULL
)
224 if (!strcmp(this_char
, MNTOPT_LOGBUFS
)) {
225 if (!value
|| !*value
) {
226 xfs_warn(mp
, "%s option requires an argument",
230 if (kstrtoint(value
, 10, &mp
->m_logbufs
))
232 } else if (!strcmp(this_char
, MNTOPT_LOGBSIZE
)) {
233 if (!value
|| !*value
) {
234 xfs_warn(mp
, "%s option requires an argument",
238 if (suffix_kstrtoint(value
, 10, &mp
->m_logbsize
))
240 } else if (!strcmp(this_char
, MNTOPT_LOGDEV
)) {
241 if (!value
|| !*value
) {
242 xfs_warn(mp
, "%s option requires an argument",
246 mp
->m_logname
= kstrndup(value
, MAXNAMELEN
, GFP_KERNEL
);
249 } else if (!strcmp(this_char
, MNTOPT_MTPT
)) {
250 xfs_warn(mp
, "%s option not allowed on this system",
253 } else if (!strcmp(this_char
, MNTOPT_RTDEV
)) {
254 if (!value
|| !*value
) {
255 xfs_warn(mp
, "%s option requires an argument",
259 mp
->m_rtname
= kstrndup(value
, MAXNAMELEN
, GFP_KERNEL
);
262 } else if (!strcmp(this_char
, MNTOPT_BIOSIZE
)) {
263 if (!value
|| !*value
) {
264 xfs_warn(mp
, "%s option requires an argument",
268 if (kstrtoint(value
, 10, &iosize
))
270 iosizelog
= ffs(iosize
) - 1;
271 } else if (!strcmp(this_char
, MNTOPT_ALLOCSIZE
)) {
272 if (!value
|| !*value
) {
273 xfs_warn(mp
, "%s option requires an argument",
277 if (suffix_kstrtoint(value
, 10, &iosize
))
279 iosizelog
= ffs(iosize
) - 1;
280 } else if (!strcmp(this_char
, MNTOPT_GRPID
) ||
281 !strcmp(this_char
, MNTOPT_BSDGROUPS
)) {
282 mp
->m_flags
|= XFS_MOUNT_GRPID
;
283 } else if (!strcmp(this_char
, MNTOPT_NOGRPID
) ||
284 !strcmp(this_char
, MNTOPT_SYSVGROUPS
)) {
285 mp
->m_flags
&= ~XFS_MOUNT_GRPID
;
286 } else if (!strcmp(this_char
, MNTOPT_WSYNC
)) {
287 mp
->m_flags
|= XFS_MOUNT_WSYNC
;
288 } else if (!strcmp(this_char
, MNTOPT_NORECOVERY
)) {
289 mp
->m_flags
|= XFS_MOUNT_NORECOVERY
;
290 } else if (!strcmp(this_char
, MNTOPT_NOALIGN
)) {
291 mp
->m_flags
|= XFS_MOUNT_NOALIGN
;
292 } else if (!strcmp(this_char
, MNTOPT_SWALLOC
)) {
293 mp
->m_flags
|= XFS_MOUNT_SWALLOC
;
294 } else if (!strcmp(this_char
, MNTOPT_SUNIT
)) {
295 if (!value
|| !*value
) {
296 xfs_warn(mp
, "%s option requires an argument",
300 if (kstrtoint(value
, 10, &dsunit
))
302 } else if (!strcmp(this_char
, MNTOPT_SWIDTH
)) {
303 if (!value
|| !*value
) {
304 xfs_warn(mp
, "%s option requires an argument",
308 if (kstrtoint(value
, 10, &dswidth
))
310 } else if (!strcmp(this_char
, MNTOPT_32BITINODE
)) {
311 mp
->m_flags
|= XFS_MOUNT_SMALL_INUMS
;
312 } else if (!strcmp(this_char
, MNTOPT_64BITINODE
)) {
313 mp
->m_flags
&= ~XFS_MOUNT_SMALL_INUMS
;
314 } else if (!strcmp(this_char
, MNTOPT_NOUUID
)) {
315 mp
->m_flags
|= XFS_MOUNT_NOUUID
;
316 } else if (!strcmp(this_char
, MNTOPT_BARRIER
)) {
317 mp
->m_flags
|= XFS_MOUNT_BARRIER
;
318 } else if (!strcmp(this_char
, MNTOPT_NOBARRIER
)) {
319 mp
->m_flags
&= ~XFS_MOUNT_BARRIER
;
320 } else if (!strcmp(this_char
, MNTOPT_IKEEP
)) {
321 mp
->m_flags
|= XFS_MOUNT_IKEEP
;
322 } else if (!strcmp(this_char
, MNTOPT_NOIKEEP
)) {
323 mp
->m_flags
&= ~XFS_MOUNT_IKEEP
;
324 } else if (!strcmp(this_char
, MNTOPT_LARGEIO
)) {
325 mp
->m_flags
&= ~XFS_MOUNT_COMPAT_IOSIZE
;
326 } else if (!strcmp(this_char
, MNTOPT_NOLARGEIO
)) {
327 mp
->m_flags
|= XFS_MOUNT_COMPAT_IOSIZE
;
328 } else if (!strcmp(this_char
, MNTOPT_ATTR2
)) {
329 mp
->m_flags
|= XFS_MOUNT_ATTR2
;
330 } else if (!strcmp(this_char
, MNTOPT_NOATTR2
)) {
331 mp
->m_flags
&= ~XFS_MOUNT_ATTR2
;
332 mp
->m_flags
|= XFS_MOUNT_NOATTR2
;
333 } else if (!strcmp(this_char
, MNTOPT_FILESTREAM
)) {
334 mp
->m_flags
|= XFS_MOUNT_FILESTREAMS
;
335 } else if (!strcmp(this_char
, MNTOPT_NOQUOTA
)) {
336 mp
->m_qflags
&= ~XFS_ALL_QUOTA_ACCT
;
337 mp
->m_qflags
&= ~XFS_ALL_QUOTA_ENFD
;
338 mp
->m_qflags
&= ~XFS_ALL_QUOTA_ACTIVE
;
339 } else if (!strcmp(this_char
, MNTOPT_QUOTA
) ||
340 !strcmp(this_char
, MNTOPT_UQUOTA
) ||
341 !strcmp(this_char
, MNTOPT_USRQUOTA
)) {
342 mp
->m_qflags
|= (XFS_UQUOTA_ACCT
| XFS_UQUOTA_ACTIVE
|
344 } else if (!strcmp(this_char
, MNTOPT_QUOTANOENF
) ||
345 !strcmp(this_char
, MNTOPT_UQUOTANOENF
)) {
346 mp
->m_qflags
|= (XFS_UQUOTA_ACCT
| XFS_UQUOTA_ACTIVE
);
347 mp
->m_qflags
&= ~XFS_UQUOTA_ENFD
;
348 } else if (!strcmp(this_char
, MNTOPT_PQUOTA
) ||
349 !strcmp(this_char
, MNTOPT_PRJQUOTA
)) {
350 mp
->m_qflags
|= (XFS_PQUOTA_ACCT
| XFS_PQUOTA_ACTIVE
|
352 } else if (!strcmp(this_char
, MNTOPT_PQUOTANOENF
)) {
353 mp
->m_qflags
|= (XFS_PQUOTA_ACCT
| XFS_PQUOTA_ACTIVE
);
354 mp
->m_qflags
&= ~XFS_PQUOTA_ENFD
;
355 } else if (!strcmp(this_char
, MNTOPT_GQUOTA
) ||
356 !strcmp(this_char
, MNTOPT_GRPQUOTA
)) {
357 mp
->m_qflags
|= (XFS_GQUOTA_ACCT
| XFS_GQUOTA_ACTIVE
|
359 } else if (!strcmp(this_char
, MNTOPT_GQUOTANOENF
)) {
360 mp
->m_qflags
|= (XFS_GQUOTA_ACCT
| XFS_GQUOTA_ACTIVE
);
361 mp
->m_qflags
&= ~XFS_GQUOTA_ENFD
;
362 } else if (!strcmp(this_char
, MNTOPT_DELAYLOG
)) {
364 "delaylog is the default now, option is deprecated.");
365 } else if (!strcmp(this_char
, MNTOPT_NODELAYLOG
)) {
367 "nodelaylog support has been removed, option is deprecated.");
368 } else if (!strcmp(this_char
, MNTOPT_DISCARD
)) {
369 mp
->m_flags
|= XFS_MOUNT_DISCARD
;
370 } else if (!strcmp(this_char
, MNTOPT_NODISCARD
)) {
371 mp
->m_flags
&= ~XFS_MOUNT_DISCARD
;
372 } else if (!strcmp(this_char
, "ihashsize")) {
374 "ihashsize no longer used, option is deprecated.");
375 } else if (!strcmp(this_char
, "osyncisdsync")) {
377 "osyncisdsync has no effect, option is deprecated.");
378 } else if (!strcmp(this_char
, "osyncisosync")) {
380 "osyncisosync has no effect, option is deprecated.");
381 } else if (!strcmp(this_char
, "irixsgid")) {
383 "irixsgid is now a sysctl(2) variable, option is deprecated.");
385 xfs_warn(mp
, "unknown mount option [%s].", this_char
);
391 * no recovery flag requires a read-only mount
393 if ((mp
->m_flags
& XFS_MOUNT_NORECOVERY
) &&
394 !(mp
->m_flags
& XFS_MOUNT_RDONLY
)) {
395 xfs_warn(mp
, "no-recovery mounts must be read-only.");
399 if ((mp
->m_flags
& XFS_MOUNT_NOALIGN
) && (dsunit
|| dswidth
)) {
401 "sunit and swidth options incompatible with the noalign option");
405 #ifndef CONFIG_XFS_QUOTA
406 if (XFS_IS_QUOTA_RUNNING(mp
)) {
407 xfs_warn(mp
, "quota support not available in this kernel.");
412 if ((dsunit
&& !dswidth
) || (!dsunit
&& dswidth
)) {
413 xfs_warn(mp
, "sunit and swidth must be specified together");
417 if (dsunit
&& (dswidth
% dsunit
!= 0)) {
419 "stripe width (%d) must be a multiple of the stripe unit (%d)",
425 if (dsunit
&& !(mp
->m_flags
& XFS_MOUNT_NOALIGN
)) {
427 * At this point the superblock has not been read
428 * in, therefore we do not know the block size.
429 * Before the mount call ends we will convert
432 mp
->m_dalign
= dsunit
;
433 mp
->m_swidth
= dswidth
;
436 if (mp
->m_logbufs
!= -1 &&
437 mp
->m_logbufs
!= 0 &&
438 (mp
->m_logbufs
< XLOG_MIN_ICLOGS
||
439 mp
->m_logbufs
> XLOG_MAX_ICLOGS
)) {
440 xfs_warn(mp
, "invalid logbufs value: %d [not %d-%d]",
441 mp
->m_logbufs
, XLOG_MIN_ICLOGS
, XLOG_MAX_ICLOGS
);
444 if (mp
->m_logbsize
!= -1 &&
445 mp
->m_logbsize
!= 0 &&
446 (mp
->m_logbsize
< XLOG_MIN_RECORD_BSIZE
||
447 mp
->m_logbsize
> XLOG_MAX_RECORD_BSIZE
||
448 !is_power_of_2(mp
->m_logbsize
))) {
450 "invalid logbufsize: %d [not 16k,32k,64k,128k or 256k]",
456 if (iosizelog
> XFS_MAX_IO_LOG
||
457 iosizelog
< XFS_MIN_IO_LOG
) {
458 xfs_warn(mp
, "invalid log iosize: %d [not %d-%d]",
459 iosizelog
, XFS_MIN_IO_LOG
,
464 mp
->m_flags
|= XFS_MOUNT_DFLT_IOSIZE
;
465 mp
->m_readio_log
= iosizelog
;
466 mp
->m_writeio_log
= iosizelog
;
472 struct proc_xfs_info
{
479 struct xfs_mount
*mp
,
482 static struct proc_xfs_info xfs_info_set
[] = {
483 /* the few simple ones we can get from the mount struct */
484 { XFS_MOUNT_IKEEP
, "," MNTOPT_IKEEP
},
485 { XFS_MOUNT_WSYNC
, "," MNTOPT_WSYNC
},
486 { XFS_MOUNT_NOALIGN
, "," MNTOPT_NOALIGN
},
487 { XFS_MOUNT_SWALLOC
, "," MNTOPT_SWALLOC
},
488 { XFS_MOUNT_NOUUID
, "," MNTOPT_NOUUID
},
489 { XFS_MOUNT_NORECOVERY
, "," MNTOPT_NORECOVERY
},
490 { XFS_MOUNT_ATTR2
, "," MNTOPT_ATTR2
},
491 { XFS_MOUNT_FILESTREAMS
, "," MNTOPT_FILESTREAM
},
492 { XFS_MOUNT_GRPID
, "," MNTOPT_GRPID
},
493 { XFS_MOUNT_DISCARD
, "," MNTOPT_DISCARD
},
494 { XFS_MOUNT_SMALL_INUMS
, "," MNTOPT_32BITINODE
},
497 static struct proc_xfs_info xfs_info_unset
[] = {
498 /* the few simple ones we can get from the mount struct */
499 { XFS_MOUNT_COMPAT_IOSIZE
, "," MNTOPT_LARGEIO
},
500 { XFS_MOUNT_BARRIER
, "," MNTOPT_NOBARRIER
},
501 { XFS_MOUNT_SMALL_INUMS
, "," MNTOPT_64BITINODE
},
504 struct proc_xfs_info
*xfs_infop
;
506 for (xfs_infop
= xfs_info_set
; xfs_infop
->flag
; xfs_infop
++) {
507 if (mp
->m_flags
& xfs_infop
->flag
)
508 seq_puts(m
, xfs_infop
->str
);
510 for (xfs_infop
= xfs_info_unset
; xfs_infop
->flag
; xfs_infop
++) {
511 if (!(mp
->m_flags
& xfs_infop
->flag
))
512 seq_puts(m
, xfs_infop
->str
);
515 if (mp
->m_flags
& XFS_MOUNT_DFLT_IOSIZE
)
516 seq_printf(m
, "," MNTOPT_ALLOCSIZE
"=%dk",
517 (int)(1 << mp
->m_writeio_log
) >> 10);
519 if (mp
->m_logbufs
> 0)
520 seq_printf(m
, "," MNTOPT_LOGBUFS
"=%d", mp
->m_logbufs
);
521 if (mp
->m_logbsize
> 0)
522 seq_printf(m
, "," MNTOPT_LOGBSIZE
"=%dk", mp
->m_logbsize
>> 10);
525 seq_printf(m
, "," MNTOPT_LOGDEV
"=%s", mp
->m_logname
);
527 seq_printf(m
, "," MNTOPT_RTDEV
"=%s", mp
->m_rtname
);
529 if (mp
->m_dalign
> 0)
530 seq_printf(m
, "," MNTOPT_SUNIT
"=%d",
531 (int)XFS_FSB_TO_BB(mp
, mp
->m_dalign
));
532 if (mp
->m_swidth
> 0)
533 seq_printf(m
, "," MNTOPT_SWIDTH
"=%d",
534 (int)XFS_FSB_TO_BB(mp
, mp
->m_swidth
));
536 if (mp
->m_qflags
& (XFS_UQUOTA_ACCT
|XFS_UQUOTA_ENFD
))
537 seq_puts(m
, "," MNTOPT_USRQUOTA
);
538 else if (mp
->m_qflags
& XFS_UQUOTA_ACCT
)
539 seq_puts(m
, "," MNTOPT_UQUOTANOENF
);
541 if (mp
->m_qflags
& XFS_PQUOTA_ACCT
) {
542 if (mp
->m_qflags
& XFS_PQUOTA_ENFD
)
543 seq_puts(m
, "," MNTOPT_PRJQUOTA
);
545 seq_puts(m
, "," MNTOPT_PQUOTANOENF
);
547 if (mp
->m_qflags
& XFS_GQUOTA_ACCT
) {
548 if (mp
->m_qflags
& XFS_GQUOTA_ENFD
)
549 seq_puts(m
, "," MNTOPT_GRPQUOTA
);
551 seq_puts(m
, "," MNTOPT_GQUOTANOENF
);
554 if (!(mp
->m_qflags
& XFS_ALL_QUOTA_ACCT
))
555 seq_puts(m
, "," MNTOPT_NOQUOTA
);
561 unsigned int blockshift
)
563 unsigned int pagefactor
= 1;
564 unsigned int bitshift
= BITS_PER_LONG
- 1;
566 /* Figure out maximum filesize, on Linux this can depend on
567 * the filesystem blocksize (on 32 bit platforms).
568 * __block_write_begin does this in an [unsigned] long...
569 * page->index << (PAGE_CACHE_SHIFT - bbits)
570 * So, for page sized blocks (4K on 32 bit platforms),
571 * this wraps at around 8Tb (hence MAX_LFS_FILESIZE which is
572 * (((u64)PAGE_CACHE_SIZE << (BITS_PER_LONG-1))-1)
573 * but for smaller blocksizes it is less (bbits = log2 bsize).
574 * Note1: get_block_t takes a long (implicit cast from above)
575 * Note2: The Large Block Device (LBD and HAVE_SECTOR_T) patch
576 * can optionally convert the [unsigned] long from above into
577 * an [unsigned] long long.
580 #if BITS_PER_LONG == 32
581 # if defined(CONFIG_LBDAF)
582 ASSERT(sizeof(sector_t
) == 8);
583 pagefactor
= PAGE_CACHE_SIZE
;
584 bitshift
= BITS_PER_LONG
;
586 pagefactor
= PAGE_CACHE_SIZE
>> (PAGE_CACHE_SHIFT
- blockshift
);
590 return (((__uint64_t
)pagefactor
) << bitshift
) - 1;
594 * xfs_set_inode32() and xfs_set_inode64() are passed an agcount
595 * because in the growfs case, mp->m_sb.sb_agcount is not updated
596 * yet to the potentially higher ag count.
599 xfs_set_inode32(struct xfs_mount
*mp
, xfs_agnumber_t agcount
)
601 xfs_agnumber_t index
= 0;
602 xfs_agnumber_t maxagi
= 0;
603 xfs_sb_t
*sbp
= &mp
->m_sb
;
604 xfs_agnumber_t max_metadata
;
609 /* Calculate how much should be reserved for inodes to meet
610 * the max inode percentage.
612 if (mp
->m_maxicount
) {
615 icount
= sbp
->sb_dblocks
* sbp
->sb_imax_pct
;
617 icount
+= sbp
->sb_agblocks
- 1;
618 do_div(icount
, sbp
->sb_agblocks
);
619 max_metadata
= icount
;
621 max_metadata
= agcount
;
624 agino
= XFS_OFFBNO_TO_AGINO(mp
, sbp
->sb_agblocks
- 1, 0);
626 for (index
= 0; index
< agcount
; index
++) {
627 ino
= XFS_AGINO_TO_INO(mp
, index
, agino
);
629 if (ino
> XFS_MAXINUMBER_32
) {
630 pag
= xfs_perag_get(mp
, index
);
631 pag
->pagi_inodeok
= 0;
632 pag
->pagf_metadata
= 0;
637 pag
= xfs_perag_get(mp
, index
);
638 pag
->pagi_inodeok
= 1;
640 if (index
< max_metadata
)
641 pag
->pagf_metadata
= 1;
644 mp
->m_flags
|= (XFS_MOUNT_32BITINODES
|
645 XFS_MOUNT_SMALL_INUMS
);
651 xfs_set_inode64(struct xfs_mount
*mp
, xfs_agnumber_t agcount
)
653 xfs_agnumber_t index
= 0;
655 for (index
= 0; index
< agcount
; index
++) {
656 struct xfs_perag
*pag
;
658 pag
= xfs_perag_get(mp
, index
);
659 pag
->pagi_inodeok
= 1;
660 pag
->pagf_metadata
= 0;
664 /* There is no need for lock protection on m_flags,
665 * the rw_semaphore of the VFS superblock is locked
666 * during mount/umount/remount operations, so this is
667 * enough to avoid concurency on the m_flags field
669 mp
->m_flags
&= ~(XFS_MOUNT_32BITINODES
|
670 XFS_MOUNT_SMALL_INUMS
);
678 struct block_device
**bdevp
)
682 *bdevp
= blkdev_get_by_path(name
, FMODE_READ
|FMODE_WRITE
|FMODE_EXCL
,
684 if (IS_ERR(*bdevp
)) {
685 error
= PTR_ERR(*bdevp
);
686 xfs_warn(mp
, "Invalid device [%s], error=%d\n", name
, error
);
694 struct block_device
*bdev
)
697 blkdev_put(bdev
, FMODE_READ
|FMODE_WRITE
|FMODE_EXCL
);
701 xfs_blkdev_issue_flush(
702 xfs_buftarg_t
*buftarg
)
704 blkdev_issue_flush(buftarg
->bt_bdev
, GFP_NOFS
, NULL
);
709 struct xfs_mount
*mp
)
711 if (mp
->m_logdev_targp
&& mp
->m_logdev_targp
!= mp
->m_ddev_targp
) {
712 struct block_device
*logdev
= mp
->m_logdev_targp
->bt_bdev
;
713 xfs_free_buftarg(mp
, mp
->m_logdev_targp
);
714 xfs_blkdev_put(logdev
);
716 if (mp
->m_rtdev_targp
) {
717 struct block_device
*rtdev
= mp
->m_rtdev_targp
->bt_bdev
;
718 xfs_free_buftarg(mp
, mp
->m_rtdev_targp
);
719 xfs_blkdev_put(rtdev
);
721 xfs_free_buftarg(mp
, mp
->m_ddev_targp
);
725 * The file system configurations are:
726 * (1) device (partition) with data and internal log
727 * (2) logical volume with data and log subvolumes.
728 * (3) logical volume with data, log, and realtime subvolumes.
730 * We only have to handle opening the log and realtime volumes here if
731 * they are present. The data subvolume has already been opened by
732 * get_sb_bdev() and is stored in sb->s_bdev.
736 struct xfs_mount
*mp
)
738 struct block_device
*ddev
= mp
->m_super
->s_bdev
;
739 struct block_device
*logdev
= NULL
, *rtdev
= NULL
;
743 * Open real time and log devices - order is important.
746 error
= xfs_blkdev_get(mp
, mp
->m_logname
, &logdev
);
752 error
= xfs_blkdev_get(mp
, mp
->m_rtname
, &rtdev
);
754 goto out_close_logdev
;
756 if (rtdev
== ddev
|| rtdev
== logdev
) {
758 "Cannot mount filesystem with identical rtdev and ddev/logdev.");
760 goto out_close_rtdev
;
765 * Setup xfs_mount buffer target pointers
768 mp
->m_ddev_targp
= xfs_alloc_buftarg(mp
, ddev
);
769 if (!mp
->m_ddev_targp
)
770 goto out_close_rtdev
;
773 mp
->m_rtdev_targp
= xfs_alloc_buftarg(mp
, rtdev
);
774 if (!mp
->m_rtdev_targp
)
775 goto out_free_ddev_targ
;
778 if (logdev
&& logdev
!= ddev
) {
779 mp
->m_logdev_targp
= xfs_alloc_buftarg(mp
, logdev
);
780 if (!mp
->m_logdev_targp
)
781 goto out_free_rtdev_targ
;
783 mp
->m_logdev_targp
= mp
->m_ddev_targp
;
789 if (mp
->m_rtdev_targp
)
790 xfs_free_buftarg(mp
, mp
->m_rtdev_targp
);
792 xfs_free_buftarg(mp
, mp
->m_ddev_targp
);
795 xfs_blkdev_put(rtdev
);
797 if (logdev
&& logdev
!= ddev
)
798 xfs_blkdev_put(logdev
);
804 * Setup xfs_mount buffer target pointers based on superblock
808 struct xfs_mount
*mp
)
812 error
= xfs_setsize_buftarg(mp
->m_ddev_targp
, mp
->m_sb
.sb_sectsize
);
816 if (mp
->m_logdev_targp
&& mp
->m_logdev_targp
!= mp
->m_ddev_targp
) {
817 unsigned int log_sector_size
= BBSIZE
;
819 if (xfs_sb_version_hassector(&mp
->m_sb
))
820 log_sector_size
= mp
->m_sb
.sb_logsectsize
;
821 error
= xfs_setsize_buftarg(mp
->m_logdev_targp
,
826 if (mp
->m_rtdev_targp
) {
827 error
= xfs_setsize_buftarg(mp
->m_rtdev_targp
,
828 mp
->m_sb
.sb_sectsize
);
837 xfs_init_mount_workqueues(
838 struct xfs_mount
*mp
)
840 mp
->m_data_workqueue
= alloc_workqueue("xfs-data/%s",
841 WQ_MEM_RECLAIM
, 0, mp
->m_fsname
);
842 if (!mp
->m_data_workqueue
)
845 mp
->m_unwritten_workqueue
= alloc_workqueue("xfs-conv/%s",
846 WQ_MEM_RECLAIM
, 0, mp
->m_fsname
);
847 if (!mp
->m_unwritten_workqueue
)
848 goto out_destroy_data_iodone_queue
;
850 mp
->m_cil_workqueue
= alloc_workqueue("xfs-cil/%s",
851 WQ_MEM_RECLAIM
, 0, mp
->m_fsname
);
852 if (!mp
->m_cil_workqueue
)
853 goto out_destroy_unwritten
;
855 mp
->m_reclaim_workqueue
= alloc_workqueue("xfs-reclaim/%s",
857 if (!mp
->m_reclaim_workqueue
)
858 goto out_destroy_cil
;
860 mp
->m_log_workqueue
= alloc_workqueue("xfs-log/%s",
862 if (!mp
->m_log_workqueue
)
863 goto out_destroy_reclaim
;
865 mp
->m_eofblocks_workqueue
= alloc_workqueue("xfs-eofblocks/%s",
867 if (!mp
->m_eofblocks_workqueue
)
868 goto out_destroy_log
;
873 destroy_workqueue(mp
->m_log_workqueue
);
875 destroy_workqueue(mp
->m_reclaim_workqueue
);
877 destroy_workqueue(mp
->m_cil_workqueue
);
878 out_destroy_unwritten
:
879 destroy_workqueue(mp
->m_unwritten_workqueue
);
880 out_destroy_data_iodone_queue
:
881 destroy_workqueue(mp
->m_data_workqueue
);
887 xfs_destroy_mount_workqueues(
888 struct xfs_mount
*mp
)
890 destroy_workqueue(mp
->m_eofblocks_workqueue
);
891 destroy_workqueue(mp
->m_log_workqueue
);
892 destroy_workqueue(mp
->m_reclaim_workqueue
);
893 destroy_workqueue(mp
->m_cil_workqueue
);
894 destroy_workqueue(mp
->m_data_workqueue
);
895 destroy_workqueue(mp
->m_unwritten_workqueue
);
899 * Flush all dirty data to disk. Must not be called while holding an XFS_ILOCK
900 * or a page lock. We use sync_inodes_sb() here to ensure we block while waiting
901 * for IO to complete so that we effectively throttle multiple callers to the
902 * rate at which IO is completing.
906 struct xfs_mount
*mp
)
908 struct super_block
*sb
= mp
->m_super
;
910 if (down_read_trylock(&sb
->s_umount
)) {
912 up_read(&sb
->s_umount
);
916 /* Catch misguided souls that try to use this interface on XFS */
917 STATIC
struct inode
*
919 struct super_block
*sb
)
926 * Now that the generic code is guaranteed not to be accessing
927 * the linux inode, we can reclaim the inode.
930 xfs_fs_destroy_inode(
933 struct xfs_inode
*ip
= XFS_I(inode
);
935 trace_xfs_destroy_inode(ip
);
937 XFS_STATS_INC(vn_reclaim
);
939 ASSERT(XFS_FORCED_SHUTDOWN(ip
->i_mount
) || ip
->i_delayed_blks
== 0);
942 * We should never get here with one of the reclaim flags already set.
944 ASSERT_ALWAYS(!xfs_iflags_test(ip
, XFS_IRECLAIMABLE
));
945 ASSERT_ALWAYS(!xfs_iflags_test(ip
, XFS_IRECLAIM
));
948 * We always use background reclaim here because even if the
949 * inode is clean, it still may be under IO and hence we have
950 * to take the flush lock. The background reclaim path handles
951 * this more efficiently than we can here, so simply let background
952 * reclaim tear down all inodes.
954 xfs_inode_set_reclaim_tag(ip
);
958 * Slab object creation initialisation for the XFS inode.
959 * This covers only the idempotent fields in the XFS inode;
960 * all other fields need to be initialised on allocation
961 * from the slab. This avoids the need to repeatedly initialise
962 * fields in the xfs inode that left in the initialise state
963 * when freeing the inode.
966 xfs_fs_inode_init_once(
969 struct xfs_inode
*ip
= inode
;
971 memset(ip
, 0, sizeof(struct xfs_inode
));
974 inode_init_once(VFS_I(ip
));
977 atomic_set(&ip
->i_pincount
, 0);
978 spin_lock_init(&ip
->i_flags_lock
);
980 mrlock_init(&ip
->i_lock
, MRLOCK_ALLOW_EQUAL_PRI
|MRLOCK_BARRIER
,
981 "xfsino", ip
->i_ino
);
988 xfs_inode_t
*ip
= XFS_I(inode
);
990 ASSERT(!rwsem_is_locked(&ip
->i_iolock
.mr_lock
));
992 trace_xfs_evict_inode(ip
);
994 truncate_inode_pages_final(&inode
->i_data
);
996 XFS_STATS_INC(vn_rele
);
997 XFS_STATS_INC(vn_remove
);
998 XFS_STATS_DEC(vn_active
);
1004 * We do an unlocked check for XFS_IDONTCACHE here because we are already
1005 * serialised against cache hits here via the inode->i_lock and igrab() in
1006 * xfs_iget_cache_hit(). Hence a lookup that might clear this flag will not be
1007 * racing with us, and it avoids needing to grab a spinlock here for every inode
1008 * we drop the final reference on.
1012 struct inode
*inode
)
1014 struct xfs_inode
*ip
= XFS_I(inode
);
1016 return generic_drop_inode(inode
) || (ip
->i_flags
& XFS_IDONTCACHE
);
1021 struct xfs_mount
*mp
)
1023 kfree(mp
->m_fsname
);
1024 kfree(mp
->m_rtname
);
1025 kfree(mp
->m_logname
);
1030 struct super_block
*sb
)
1032 struct xfs_mount
*mp
= XFS_M(sb
);
1034 xfs_filestream_unmount(mp
);
1038 xfs_icsb_destroy_counters(mp
);
1039 xfs_destroy_mount_workqueues(mp
);
1040 xfs_close_devices(mp
);
1041 xfs_free_fsname(mp
);
1047 struct super_block
*sb
,
1050 struct xfs_mount
*mp
= XFS_M(sb
);
1053 * Doing anything during the async pass would be counterproductive.
1058 xfs_log_force(mp
, XFS_LOG_SYNC
);
1061 * The disk must be active because we're syncing.
1062 * We schedule log work now (now that the disk is
1063 * active) instead of later (when it might not be).
1065 flush_delayed_work(&mp
->m_log
->l_work
);
1073 struct dentry
*dentry
,
1074 struct kstatfs
*statp
)
1076 struct xfs_mount
*mp
= XFS_M(dentry
->d_sb
);
1077 xfs_sb_t
*sbp
= &mp
->m_sb
;
1078 struct xfs_inode
*ip
= XFS_I(dentry
->d_inode
);
1079 __uint64_t fakeinos
, id
;
1083 statp
->f_type
= XFS_SB_MAGIC
;
1084 statp
->f_namelen
= MAXNAMELEN
- 1;
1086 id
= huge_encode_dev(mp
->m_ddev_targp
->bt_dev
);
1087 statp
->f_fsid
.val
[0] = (u32
)id
;
1088 statp
->f_fsid
.val
[1] = (u32
)(id
>> 32);
1090 xfs_icsb_sync_counters(mp
, XFS_ICSB_LAZY_COUNT
);
1092 spin_lock(&mp
->m_sb_lock
);
1093 statp
->f_bsize
= sbp
->sb_blocksize
;
1094 lsize
= sbp
->sb_logstart
? sbp
->sb_logblocks
: 0;
1095 statp
->f_blocks
= sbp
->sb_dblocks
- lsize
;
1096 statp
->f_bfree
= statp
->f_bavail
=
1097 sbp
->sb_fdblocks
- XFS_ALLOC_SET_ASIDE(mp
);
1098 fakeinos
= statp
->f_bfree
<< sbp
->sb_inopblog
;
1100 MIN(sbp
->sb_icount
+ fakeinos
, (__uint64_t
)XFS_MAXINUMBER
);
1101 if (mp
->m_maxicount
)
1102 statp
->f_files
= min_t(typeof(statp
->f_files
),
1106 /* make sure statp->f_ffree does not underflow */
1107 ffree
= statp
->f_files
- (sbp
->sb_icount
- sbp
->sb_ifree
);
1108 statp
->f_ffree
= max_t(__int64_t
, ffree
, 0);
1110 spin_unlock(&mp
->m_sb_lock
);
1112 if ((ip
->i_d
.di_flags
& XFS_DIFLAG_PROJINHERIT
) &&
1113 ((mp
->m_qflags
& (XFS_PQUOTA_ACCT
|XFS_PQUOTA_ENFD
))) ==
1114 (XFS_PQUOTA_ACCT
|XFS_PQUOTA_ENFD
))
1115 xfs_qm_statvfs(ip
, statp
);
1120 xfs_save_resvblks(struct xfs_mount
*mp
)
1122 __uint64_t resblks
= 0;
1124 mp
->m_resblks_save
= mp
->m_resblks
;
1125 xfs_reserve_blocks(mp
, &resblks
, NULL
);
1129 xfs_restore_resvblks(struct xfs_mount
*mp
)
1133 if (mp
->m_resblks_save
) {
1134 resblks
= mp
->m_resblks_save
;
1135 mp
->m_resblks_save
= 0;
1137 resblks
= xfs_default_resblks(mp
);
1139 xfs_reserve_blocks(mp
, &resblks
, NULL
);
1143 * Trigger writeback of all the dirty metadata in the file system.
1145 * This ensures that the metadata is written to their location on disk rather
1146 * than just existing in transactions in the log. This means after a quiesce
1147 * there is no log replay required to write the inodes to disk - this is the
1148 * primary difference between a sync and a quiesce.
1150 * Note: xfs_log_quiesce() stops background log work - the callers must ensure
1151 * it is started again when appropriate.
1155 struct xfs_mount
*mp
)
1159 /* wait for all modifications to complete */
1160 while (atomic_read(&mp
->m_active_trans
) > 0)
1163 /* force the log to unpin objects from the now complete transactions */
1164 xfs_log_force(mp
, XFS_LOG_SYNC
);
1166 /* reclaim inodes to do any IO before the freeze completes */
1167 xfs_reclaim_inodes(mp
, 0);
1168 xfs_reclaim_inodes(mp
, SYNC_WAIT
);
1170 /* Push the superblock and write an unmount record */
1171 error
= xfs_log_sbcount(mp
);
1173 xfs_warn(mp
, "xfs_attr_quiesce: failed to log sb changes. "
1174 "Frozen image may not be consistent.");
1176 * Just warn here till VFS can correctly support
1177 * read-only remount without racing.
1179 WARN_ON(atomic_read(&mp
->m_active_trans
) != 0);
1181 xfs_log_quiesce(mp
);
1186 struct super_block
*sb
,
1190 struct xfs_mount
*mp
= XFS_M(sb
);
1191 xfs_sb_t
*sbp
= &mp
->m_sb
;
1192 substring_t args
[MAX_OPT_ARGS
];
1196 sync_filesystem(sb
);
1197 while ((p
= strsep(&options
, ",")) != NULL
) {
1203 token
= match_token(p
, tokens
, args
);
1206 mp
->m_flags
|= XFS_MOUNT_BARRIER
;
1209 mp
->m_flags
&= ~XFS_MOUNT_BARRIER
;
1212 mp
->m_maxagi
= xfs_set_inode64(mp
, sbp
->sb_agcount
);
1215 mp
->m_maxagi
= xfs_set_inode32(mp
, sbp
->sb_agcount
);
1219 * Logically we would return an error here to prevent
1220 * users from believing they might have changed
1221 * mount options using remount which can't be changed.
1223 * But unfortunately mount(8) adds all options from
1224 * mtab and fstab to the mount arguments in some cases
1225 * so we can't blindly reject options, but have to
1226 * check for each specified option if it actually
1227 * differs from the currently set option and only
1228 * reject it if that's the case.
1230 * Until that is implemented we return success for
1231 * every remount request, and silently ignore all
1232 * options that we can't actually change.
1236 "mount option \"%s\" not supported for remount", p
);
1245 if ((mp
->m_flags
& XFS_MOUNT_RDONLY
) && !(*flags
& MS_RDONLY
)) {
1246 mp
->m_flags
&= ~XFS_MOUNT_RDONLY
;
1249 * If this is the first remount to writeable state we
1250 * might have some superblock changes to update.
1252 if (mp
->m_update_flags
) {
1253 error
= xfs_mount_log_sb(mp
, mp
->m_update_flags
);
1255 xfs_warn(mp
, "failed to write sb changes");
1258 mp
->m_update_flags
= 0;
1262 * Fill out the reserve pool if it is empty. Use the stashed
1263 * value if it is non-zero, otherwise go with the default.
1265 xfs_restore_resvblks(mp
);
1266 xfs_log_work_queue(mp
);
1270 if (!(mp
->m_flags
& XFS_MOUNT_RDONLY
) && (*flags
& MS_RDONLY
)) {
1272 * Before we sync the metadata, we need to free up the reserve
1273 * block pool so that the used block count in the superblock on
1274 * disk is correct at the end of the remount. Stash the current
1275 * reserve pool size so that if we get remounted rw, we can
1276 * return it to the same size.
1278 xfs_save_resvblks(mp
);
1279 xfs_quiesce_attr(mp
);
1280 mp
->m_flags
|= XFS_MOUNT_RDONLY
;
1287 * Second stage of a freeze. The data is already frozen so we only
1288 * need to take care of the metadata. Once that's done write a dummy
1289 * record to dirty the log in case of a crash while frozen.
1293 struct super_block
*sb
)
1295 struct xfs_mount
*mp
= XFS_M(sb
);
1297 xfs_save_resvblks(mp
);
1298 xfs_quiesce_attr(mp
);
1299 return xfs_fs_log_dummy(mp
);
1304 struct super_block
*sb
)
1306 struct xfs_mount
*mp
= XFS_M(sb
);
1308 xfs_restore_resvblks(mp
);
1309 xfs_log_work_queue(mp
);
1314 xfs_fs_show_options(
1316 struct dentry
*root
)
1318 return xfs_showargs(XFS_M(root
->d_sb
), m
);
1322 * This function fills in xfs_mount_t fields based on mount args.
1323 * Note: the superblock _has_ now been read in.
1327 struct xfs_mount
*mp
)
1329 int ronly
= (mp
->m_flags
& XFS_MOUNT_RDONLY
);
1331 /* Fail a mount where the logbuf is smaller than the log stripe */
1332 if (xfs_sb_version_haslogv2(&mp
->m_sb
)) {
1333 if (mp
->m_logbsize
<= 0 &&
1334 mp
->m_sb
.sb_logsunit
> XLOG_BIG_RECORD_BSIZE
) {
1335 mp
->m_logbsize
= mp
->m_sb
.sb_logsunit
;
1336 } else if (mp
->m_logbsize
> 0 &&
1337 mp
->m_logbsize
< mp
->m_sb
.sb_logsunit
) {
1339 "logbuf size must be greater than or equal to log stripe size");
1343 /* Fail a mount if the logbuf is larger than 32K */
1344 if (mp
->m_logbsize
> XLOG_BIG_RECORD_BSIZE
) {
1346 "logbuf size for version 1 logs must be 16K or 32K");
1352 * V5 filesystems always use attr2 format for attributes.
1354 if (xfs_sb_version_hascrc(&mp
->m_sb
) &&
1355 (mp
->m_flags
& XFS_MOUNT_NOATTR2
)) {
1357 "Cannot mount a V5 filesystem as %s. %s is always enabled for V5 filesystems.",
1358 MNTOPT_NOATTR2
, MNTOPT_ATTR2
);
1363 * mkfs'ed attr2 will turn on attr2 mount unless explicitly
1364 * told by noattr2 to turn it off
1366 if (xfs_sb_version_hasattr2(&mp
->m_sb
) &&
1367 !(mp
->m_flags
& XFS_MOUNT_NOATTR2
))
1368 mp
->m_flags
|= XFS_MOUNT_ATTR2
;
1371 * prohibit r/w mounts of read-only filesystems
1373 if ((mp
->m_sb
.sb_flags
& XFS_SBF_READONLY
) && !ronly
) {
1375 "cannot mount a read-only filesystem as read-write");
1379 if ((mp
->m_qflags
& (XFS_GQUOTA_ACCT
| XFS_GQUOTA_ACTIVE
)) &&
1380 (mp
->m_qflags
& (XFS_PQUOTA_ACCT
| XFS_PQUOTA_ACTIVE
)) &&
1381 !xfs_sb_version_has_pquotino(&mp
->m_sb
)) {
1383 "Super block does not support project and group quota together");
1392 struct super_block
*sb
,
1397 struct xfs_mount
*mp
= NULL
;
1398 int flags
= 0, error
= -ENOMEM
;
1400 mp
= kzalloc(sizeof(struct xfs_mount
), GFP_KERNEL
);
1404 spin_lock_init(&mp
->m_sb_lock
);
1405 mutex_init(&mp
->m_growlock
);
1406 atomic_set(&mp
->m_active_trans
, 0);
1407 INIT_DELAYED_WORK(&mp
->m_reclaim_work
, xfs_reclaim_worker
);
1408 INIT_DELAYED_WORK(&mp
->m_eofblocks_work
, xfs_eofblocks_worker
);
1413 error
= xfs_parseargs(mp
, (char *)data
);
1415 goto out_free_fsname
;
1417 sb_min_blocksize(sb
, BBSIZE
);
1418 sb
->s_xattr
= xfs_xattr_handlers
;
1419 sb
->s_export_op
= &xfs_export_operations
;
1420 #ifdef CONFIG_XFS_QUOTA
1421 sb
->s_qcop
= &xfs_quotactl_operations
;
1423 sb
->s_op
= &xfs_super_operations
;
1426 flags
|= XFS_MFSI_QUIET
;
1428 error
= xfs_open_devices(mp
);
1430 goto out_free_fsname
;
1432 error
= xfs_init_mount_workqueues(mp
);
1434 goto out_close_devices
;
1436 error
= xfs_icsb_init_counters(mp
);
1438 goto out_destroy_workqueues
;
1440 error
= xfs_readsb(mp
, flags
);
1442 goto out_destroy_counters
;
1444 error
= xfs_finish_flags(mp
);
1448 error
= xfs_setup_devices(mp
);
1452 error
= xfs_filestream_mount(mp
);
1457 * we must configure the block size in the superblock before we run the
1458 * full mount process as the mount process can lookup and cache inodes.
1460 sb
->s_magic
= XFS_SB_MAGIC
;
1461 sb
->s_blocksize
= mp
->m_sb
.sb_blocksize
;
1462 sb
->s_blocksize_bits
= ffs(sb
->s_blocksize
) - 1;
1463 sb
->s_maxbytes
= xfs_max_file_offset(sb
->s_blocksize_bits
);
1464 sb
->s_max_links
= XFS_MAXLINK
;
1465 sb
->s_time_gran
= 1;
1466 set_posix_acl_flag(sb
);
1468 /* version 5 superblocks support inode version counters. */
1469 if (XFS_SB_VERSION_NUM(&mp
->m_sb
) == XFS_SB_VERSION_5
)
1470 sb
->s_flags
|= MS_I_VERSION
;
1472 error
= xfs_mountfs(mp
);
1474 goto out_filestream_unmount
;
1476 root
= igrab(VFS_I(mp
->m_rootip
));
1481 sb
->s_root
= d_make_root(root
);
1489 out_filestream_unmount
:
1490 xfs_filestream_unmount(mp
);
1493 out_destroy_counters
:
1494 xfs_icsb_destroy_counters(mp
);
1495 out_destroy_workqueues
:
1496 xfs_destroy_mount_workqueues(mp
);
1498 xfs_close_devices(mp
);
1500 xfs_free_fsname(mp
);
1506 xfs_filestream_unmount(mp
);
1511 STATIC
struct dentry
*
1513 struct file_system_type
*fs_type
,
1515 const char *dev_name
,
1518 return mount_bdev(fs_type
, flags
, dev_name
, data
, xfs_fs_fill_super
);
1522 xfs_fs_nr_cached_objects(
1523 struct super_block
*sb
,
1526 return xfs_reclaim_inodes_count(XFS_M(sb
));
1530 xfs_fs_free_cached_objects(
1531 struct super_block
*sb
,
1535 return xfs_reclaim_inodes_nr(XFS_M(sb
), nr_to_scan
);
1538 static const struct super_operations xfs_super_operations
= {
1539 .alloc_inode
= xfs_fs_alloc_inode
,
1540 .destroy_inode
= xfs_fs_destroy_inode
,
1541 .evict_inode
= xfs_fs_evict_inode
,
1542 .drop_inode
= xfs_fs_drop_inode
,
1543 .put_super
= xfs_fs_put_super
,
1544 .sync_fs
= xfs_fs_sync_fs
,
1545 .freeze_fs
= xfs_fs_freeze
,
1546 .unfreeze_fs
= xfs_fs_unfreeze
,
1547 .statfs
= xfs_fs_statfs
,
1548 .remount_fs
= xfs_fs_remount
,
1549 .show_options
= xfs_fs_show_options
,
1550 .nr_cached_objects
= xfs_fs_nr_cached_objects
,
1551 .free_cached_objects
= xfs_fs_free_cached_objects
,
1554 static struct file_system_type xfs_fs_type
= {
1555 .owner
= THIS_MODULE
,
1557 .mount
= xfs_fs_mount
,
1558 .kill_sb
= kill_block_super
,
1559 .fs_flags
= FS_REQUIRES_DEV
,
1561 MODULE_ALIAS_FS("xfs");
1564 xfs_init_zones(void)
1567 xfs_ioend_zone
= kmem_zone_init(sizeof(xfs_ioend_t
), "xfs_ioend");
1568 if (!xfs_ioend_zone
)
1571 xfs_ioend_pool
= mempool_create_slab_pool(4 * MAX_BUF_PER_PAGE
,
1573 if (!xfs_ioend_pool
)
1574 goto out_destroy_ioend_zone
;
1576 xfs_log_ticket_zone
= kmem_zone_init(sizeof(xlog_ticket_t
),
1578 if (!xfs_log_ticket_zone
)
1579 goto out_destroy_ioend_pool
;
1581 xfs_bmap_free_item_zone
= kmem_zone_init(sizeof(xfs_bmap_free_item_t
),
1582 "xfs_bmap_free_item");
1583 if (!xfs_bmap_free_item_zone
)
1584 goto out_destroy_log_ticket_zone
;
1586 xfs_btree_cur_zone
= kmem_zone_init(sizeof(xfs_btree_cur_t
),
1588 if (!xfs_btree_cur_zone
)
1589 goto out_destroy_bmap_free_item_zone
;
1591 xfs_da_state_zone
= kmem_zone_init(sizeof(xfs_da_state_t
),
1593 if (!xfs_da_state_zone
)
1594 goto out_destroy_btree_cur_zone
;
1596 xfs_ifork_zone
= kmem_zone_init(sizeof(xfs_ifork_t
), "xfs_ifork");
1597 if (!xfs_ifork_zone
)
1598 goto out_destroy_da_state_zone
;
1600 xfs_trans_zone
= kmem_zone_init(sizeof(xfs_trans_t
), "xfs_trans");
1601 if (!xfs_trans_zone
)
1602 goto out_destroy_ifork_zone
;
1604 xfs_log_item_desc_zone
=
1605 kmem_zone_init(sizeof(struct xfs_log_item_desc
),
1606 "xfs_log_item_desc");
1607 if (!xfs_log_item_desc_zone
)
1608 goto out_destroy_trans_zone
;
1611 * The size of the zone allocated buf log item is the maximum
1612 * size possible under XFS. This wastes a little bit of memory,
1613 * but it is much faster.
1615 xfs_buf_item_zone
= kmem_zone_init(sizeof(struct xfs_buf_log_item
),
1617 if (!xfs_buf_item_zone
)
1618 goto out_destroy_log_item_desc_zone
;
1620 xfs_efd_zone
= kmem_zone_init((sizeof(xfs_efd_log_item_t
) +
1621 ((XFS_EFD_MAX_FAST_EXTENTS
- 1) *
1622 sizeof(xfs_extent_t
))), "xfs_efd_item");
1624 goto out_destroy_buf_item_zone
;
1626 xfs_efi_zone
= kmem_zone_init((sizeof(xfs_efi_log_item_t
) +
1627 ((XFS_EFI_MAX_FAST_EXTENTS
- 1) *
1628 sizeof(xfs_extent_t
))), "xfs_efi_item");
1630 goto out_destroy_efd_zone
;
1633 kmem_zone_init_flags(sizeof(xfs_inode_t
), "xfs_inode",
1634 KM_ZONE_HWALIGN
| KM_ZONE_RECLAIM
| KM_ZONE_SPREAD
,
1635 xfs_fs_inode_init_once
);
1636 if (!xfs_inode_zone
)
1637 goto out_destroy_efi_zone
;
1640 kmem_zone_init_flags(sizeof(xfs_inode_log_item_t
), "xfs_ili",
1641 KM_ZONE_SPREAD
, NULL
);
1643 goto out_destroy_inode_zone
;
1644 xfs_icreate_zone
= kmem_zone_init(sizeof(struct xfs_icreate_item
),
1646 if (!xfs_icreate_zone
)
1647 goto out_destroy_ili_zone
;
1651 out_destroy_ili_zone
:
1652 kmem_zone_destroy(xfs_ili_zone
);
1653 out_destroy_inode_zone
:
1654 kmem_zone_destroy(xfs_inode_zone
);
1655 out_destroy_efi_zone
:
1656 kmem_zone_destroy(xfs_efi_zone
);
1657 out_destroy_efd_zone
:
1658 kmem_zone_destroy(xfs_efd_zone
);
1659 out_destroy_buf_item_zone
:
1660 kmem_zone_destroy(xfs_buf_item_zone
);
1661 out_destroy_log_item_desc_zone
:
1662 kmem_zone_destroy(xfs_log_item_desc_zone
);
1663 out_destroy_trans_zone
:
1664 kmem_zone_destroy(xfs_trans_zone
);
1665 out_destroy_ifork_zone
:
1666 kmem_zone_destroy(xfs_ifork_zone
);
1667 out_destroy_da_state_zone
:
1668 kmem_zone_destroy(xfs_da_state_zone
);
1669 out_destroy_btree_cur_zone
:
1670 kmem_zone_destroy(xfs_btree_cur_zone
);
1671 out_destroy_bmap_free_item_zone
:
1672 kmem_zone_destroy(xfs_bmap_free_item_zone
);
1673 out_destroy_log_ticket_zone
:
1674 kmem_zone_destroy(xfs_log_ticket_zone
);
1675 out_destroy_ioend_pool
:
1676 mempool_destroy(xfs_ioend_pool
);
1677 out_destroy_ioend_zone
:
1678 kmem_zone_destroy(xfs_ioend_zone
);
1684 xfs_destroy_zones(void)
1687 * Make sure all delayed rcu free are flushed before we
1691 kmem_zone_destroy(xfs_icreate_zone
);
1692 kmem_zone_destroy(xfs_ili_zone
);
1693 kmem_zone_destroy(xfs_inode_zone
);
1694 kmem_zone_destroy(xfs_efi_zone
);
1695 kmem_zone_destroy(xfs_efd_zone
);
1696 kmem_zone_destroy(xfs_buf_item_zone
);
1697 kmem_zone_destroy(xfs_log_item_desc_zone
);
1698 kmem_zone_destroy(xfs_trans_zone
);
1699 kmem_zone_destroy(xfs_ifork_zone
);
1700 kmem_zone_destroy(xfs_da_state_zone
);
1701 kmem_zone_destroy(xfs_btree_cur_zone
);
1702 kmem_zone_destroy(xfs_bmap_free_item_zone
);
1703 kmem_zone_destroy(xfs_log_ticket_zone
);
1704 mempool_destroy(xfs_ioend_pool
);
1705 kmem_zone_destroy(xfs_ioend_zone
);
1710 xfs_init_workqueues(void)
1713 * The allocation workqueue can be used in memory reclaim situations
1714 * (writepage path), and parallelism is only limited by the number of
1715 * AGs in all the filesystems mounted. Hence use the default large
1716 * max_active value for this workqueue.
1718 xfs_alloc_wq
= alloc_workqueue("xfsalloc", WQ_MEM_RECLAIM
, 0);
1726 xfs_destroy_workqueues(void)
1728 destroy_workqueue(xfs_alloc_wq
);
1736 printk(KERN_INFO XFS_VERSION_STRING
" with "
1737 XFS_BUILD_OPTIONS
" enabled\n");
1741 error
= xfs_init_zones();
1745 error
= xfs_init_workqueues();
1747 goto out_destroy_zones
;
1749 error
= xfs_mru_cache_init();
1751 goto out_destroy_wq
;
1753 error
= xfs_buf_init();
1755 goto out_mru_cache_uninit
;
1757 error
= xfs_init_procfs();
1759 goto out_buf_terminate
;
1761 error
= xfs_sysctl_register();
1763 goto out_cleanup_procfs
;
1765 xfs_kset
= kset_create_and_add("xfs", NULL
, fs_kobj
);
1768 goto out_sysctl_unregister
;;
1771 error
= xfs_qm_init();
1773 goto out_kset_unregister
;
1775 error
= register_filesystem(&xfs_fs_type
);
1782 out_kset_unregister
:
1783 kset_unregister(xfs_kset
);
1784 out_sysctl_unregister
:
1785 xfs_sysctl_unregister();
1787 xfs_cleanup_procfs();
1789 xfs_buf_terminate();
1790 out_mru_cache_uninit
:
1791 xfs_mru_cache_uninit();
1793 xfs_destroy_workqueues();
1795 xfs_destroy_zones();
1804 unregister_filesystem(&xfs_fs_type
);
1805 kset_unregister(xfs_kset
);
1806 xfs_sysctl_unregister();
1807 xfs_cleanup_procfs();
1808 xfs_buf_terminate();
1809 xfs_mru_cache_uninit();
1810 xfs_destroy_workqueues();
1811 xfs_destroy_zones();
1814 module_init(init_xfs_fs
);
1815 module_exit(exit_xfs_fs
);
1817 MODULE_AUTHOR("Silicon Graphics, Inc.");
1818 MODULE_DESCRIPTION(XFS_VERSION_STRING
" with " XFS_BUILD_OPTIONS
" enabled");
1819 MODULE_LICENSE("GPL");