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"
25 #include "xfs_mount.h"
26 #include "xfs_da_format.h"
27 #include "xfs_inode.h"
28 #include "xfs_btree.h"
30 #include "xfs_alloc.h"
31 #include "xfs_error.h"
32 #include "xfs_fsops.h"
33 #include "xfs_trans.h"
34 #include "xfs_buf_item.h"
36 #include "xfs_log_priv.h"
37 #include "xfs_da_btree.h"
39 #include "xfs_extfree_item.h"
40 #include "xfs_mru_cache.h"
41 #include "xfs_inode_item.h"
42 #include "xfs_icache.h"
43 #include "xfs_trace.h"
44 #include "xfs_icreate_item.h"
45 #include "xfs_filestream.h"
46 #include "xfs_quota.h"
47 #include "xfs_sysfs.h"
49 #include <linux/namei.h>
50 #include <linux/init.h>
51 #include <linux/slab.h>
52 #include <linux/mount.h>
53 #include <linux/mempool.h>
54 #include <linux/writeback.h>
55 #include <linux/kthread.h>
56 #include <linux/freezer.h>
57 #include <linux/parser.h>
59 static const struct super_operations xfs_super_operations
;
60 static kmem_zone_t
*xfs_ioend_zone
;
61 mempool_t
*xfs_ioend_pool
;
63 static struct kset
*xfs_kset
; /* top-level xfs sysfs dir */
65 static struct xfs_kobj xfs_dbg_kobj
; /* global debug sysfs attrs */
68 #define MNTOPT_LOGBUFS "logbufs" /* number of XFS log buffers */
69 #define MNTOPT_LOGBSIZE "logbsize" /* size of XFS log buffers */
70 #define MNTOPT_LOGDEV "logdev" /* log device */
71 #define MNTOPT_RTDEV "rtdev" /* realtime I/O device */
72 #define MNTOPT_BIOSIZE "biosize" /* log2 of preferred buffered io size */
73 #define MNTOPT_WSYNC "wsync" /* safe-mode nfs compatible mount */
74 #define MNTOPT_NOALIGN "noalign" /* turn off stripe alignment */
75 #define MNTOPT_SWALLOC "swalloc" /* turn on stripe width allocation */
76 #define MNTOPT_SUNIT "sunit" /* data volume stripe unit */
77 #define MNTOPT_SWIDTH "swidth" /* data volume stripe width */
78 #define MNTOPT_NOUUID "nouuid" /* ignore filesystem UUID */
79 #define MNTOPT_MTPT "mtpt" /* filesystem mount point */
80 #define MNTOPT_GRPID "grpid" /* group-ID from parent directory */
81 #define MNTOPT_NOGRPID "nogrpid" /* group-ID from current process */
82 #define MNTOPT_BSDGROUPS "bsdgroups" /* group-ID from parent directory */
83 #define MNTOPT_SYSVGROUPS "sysvgroups" /* group-ID from current process */
84 #define MNTOPT_ALLOCSIZE "allocsize" /* preferred allocation size */
85 #define MNTOPT_NORECOVERY "norecovery" /* don't run XFS recovery */
86 #define MNTOPT_BARRIER "barrier" /* use writer barriers for log write and
87 * unwritten extent conversion */
88 #define MNTOPT_NOBARRIER "nobarrier" /* .. disable */
89 #define MNTOPT_64BITINODE "inode64" /* inodes can be allocated anywhere */
90 #define MNTOPT_32BITINODE "inode32" /* inode allocation limited to
91 * XFS_MAXINUMBER_32 */
92 #define MNTOPT_IKEEP "ikeep" /* do not free empty inode clusters */
93 #define MNTOPT_NOIKEEP "noikeep" /* free empty inode clusters */
94 #define MNTOPT_LARGEIO "largeio" /* report large I/O sizes in stat() */
95 #define MNTOPT_NOLARGEIO "nolargeio" /* do not report large I/O sizes
97 #define MNTOPT_ATTR2 "attr2" /* do use attr2 attribute format */
98 #define MNTOPT_NOATTR2 "noattr2" /* do not use attr2 attribute format */
99 #define MNTOPT_FILESTREAM "filestreams" /* use filestreams allocator */
100 #define MNTOPT_QUOTA "quota" /* disk quotas (user) */
101 #define MNTOPT_NOQUOTA "noquota" /* no quotas */
102 #define MNTOPT_USRQUOTA "usrquota" /* user quota enabled */
103 #define MNTOPT_GRPQUOTA "grpquota" /* group quota enabled */
104 #define MNTOPT_PRJQUOTA "prjquota" /* project quota enabled */
105 #define MNTOPT_UQUOTA "uquota" /* user quota (IRIX variant) */
106 #define MNTOPT_GQUOTA "gquota" /* group quota (IRIX variant) */
107 #define MNTOPT_PQUOTA "pquota" /* project quota (IRIX variant) */
108 #define MNTOPT_UQUOTANOENF "uqnoenforce"/* user quota limit enforcement */
109 #define MNTOPT_GQUOTANOENF "gqnoenforce"/* group quota limit enforcement */
110 #define MNTOPT_PQUOTANOENF "pqnoenforce"/* project quota limit enforcement */
111 #define MNTOPT_QUOTANOENF "qnoenforce" /* same as uqnoenforce */
112 #define MNTOPT_DELAYLOG "delaylog" /* Delayed logging enabled */
113 #define MNTOPT_NODELAYLOG "nodelaylog" /* Delayed logging disabled */
114 #define MNTOPT_DISCARD "discard" /* Discard unused blocks */
115 #define MNTOPT_NODISCARD "nodiscard" /* Do not discard unused blocks */
118 * Table driven mount option parser.
120 * Currently only used for remount, but it will be used for mount
121 * in the future, too.
131 static const match_table_t tokens
= {
132 {Opt_barrier
, "barrier"},
133 {Opt_nobarrier
, "nobarrier"},
134 {Opt_inode64
, "inode64"},
135 {Opt_inode32
, "inode32"},
141 suffix_kstrtoint(char *s
, unsigned int base
, int *res
)
143 int last
, shift_left_factor
= 0, _res
;
146 last
= strlen(value
) - 1;
147 if (value
[last
] == 'K' || value
[last
] == 'k') {
148 shift_left_factor
= 10;
151 if (value
[last
] == 'M' || value
[last
] == 'm') {
152 shift_left_factor
= 20;
155 if (value
[last
] == 'G' || value
[last
] == 'g') {
156 shift_left_factor
= 30;
160 if (kstrtoint(s
, base
, &_res
))
162 *res
= _res
<< shift_left_factor
;
167 * This function fills in xfs_mount_t fields based on mount args.
168 * Note: the superblock has _not_ yet been read in.
170 * Note that this function leaks the various device name allocations on
171 * failure. The caller takes care of them.
175 struct xfs_mount
*mp
,
178 struct super_block
*sb
= mp
->m_super
;
179 char *this_char
, *value
;
183 __uint8_t iosizelog
= 0;
186 * set up the mount name first so all the errors will refer to the
189 mp
->m_fsname
= kstrndup(sb
->s_id
, MAXNAMELEN
, GFP_KERNEL
);
192 mp
->m_fsname_len
= strlen(mp
->m_fsname
) + 1;
195 * Copy binary VFS mount flags we are interested in.
197 if (sb
->s_flags
& MS_RDONLY
)
198 mp
->m_flags
|= XFS_MOUNT_RDONLY
;
199 if (sb
->s_flags
& MS_DIRSYNC
)
200 mp
->m_flags
|= XFS_MOUNT_DIRSYNC
;
201 if (sb
->s_flags
& MS_SYNCHRONOUS
)
202 mp
->m_flags
|= XFS_MOUNT_WSYNC
;
205 * Set some default flags that could be cleared by the mount option
208 mp
->m_flags
|= XFS_MOUNT_BARRIER
;
209 mp
->m_flags
|= XFS_MOUNT_COMPAT_IOSIZE
;
212 * These can be overridden by the mount option parsing.
220 while ((this_char
= strsep(&options
, ",")) != NULL
) {
223 if ((value
= strchr(this_char
, '=')) != NULL
)
226 if (!strcmp(this_char
, MNTOPT_LOGBUFS
)) {
227 if (!value
|| !*value
) {
228 xfs_warn(mp
, "%s option requires an argument",
232 if (kstrtoint(value
, 10, &mp
->m_logbufs
))
234 } else if (!strcmp(this_char
, MNTOPT_LOGBSIZE
)) {
235 if (!value
|| !*value
) {
236 xfs_warn(mp
, "%s option requires an argument",
240 if (suffix_kstrtoint(value
, 10, &mp
->m_logbsize
))
242 } else if (!strcmp(this_char
, MNTOPT_LOGDEV
)) {
243 if (!value
|| !*value
) {
244 xfs_warn(mp
, "%s option requires an argument",
248 mp
->m_logname
= kstrndup(value
, MAXNAMELEN
, GFP_KERNEL
);
251 } else if (!strcmp(this_char
, MNTOPT_MTPT
)) {
252 xfs_warn(mp
, "%s option not allowed on this system",
255 } else if (!strcmp(this_char
, MNTOPT_RTDEV
)) {
256 if (!value
|| !*value
) {
257 xfs_warn(mp
, "%s option requires an argument",
261 mp
->m_rtname
= kstrndup(value
, MAXNAMELEN
, GFP_KERNEL
);
264 } else if (!strcmp(this_char
, MNTOPT_BIOSIZE
)) {
265 if (!value
|| !*value
) {
266 xfs_warn(mp
, "%s option requires an argument",
270 if (kstrtoint(value
, 10, &iosize
))
272 iosizelog
= ffs(iosize
) - 1;
273 } else if (!strcmp(this_char
, MNTOPT_ALLOCSIZE
)) {
274 if (!value
|| !*value
) {
275 xfs_warn(mp
, "%s option requires an argument",
279 if (suffix_kstrtoint(value
, 10, &iosize
))
281 iosizelog
= ffs(iosize
) - 1;
282 } else if (!strcmp(this_char
, MNTOPT_GRPID
) ||
283 !strcmp(this_char
, MNTOPT_BSDGROUPS
)) {
284 mp
->m_flags
|= XFS_MOUNT_GRPID
;
285 } else if (!strcmp(this_char
, MNTOPT_NOGRPID
) ||
286 !strcmp(this_char
, MNTOPT_SYSVGROUPS
)) {
287 mp
->m_flags
&= ~XFS_MOUNT_GRPID
;
288 } else if (!strcmp(this_char
, MNTOPT_WSYNC
)) {
289 mp
->m_flags
|= XFS_MOUNT_WSYNC
;
290 } else if (!strcmp(this_char
, MNTOPT_NORECOVERY
)) {
291 mp
->m_flags
|= XFS_MOUNT_NORECOVERY
;
292 } else if (!strcmp(this_char
, MNTOPT_NOALIGN
)) {
293 mp
->m_flags
|= XFS_MOUNT_NOALIGN
;
294 } else if (!strcmp(this_char
, MNTOPT_SWALLOC
)) {
295 mp
->m_flags
|= XFS_MOUNT_SWALLOC
;
296 } else if (!strcmp(this_char
, MNTOPT_SUNIT
)) {
297 if (!value
|| !*value
) {
298 xfs_warn(mp
, "%s option requires an argument",
302 if (kstrtoint(value
, 10, &dsunit
))
304 } else if (!strcmp(this_char
, MNTOPT_SWIDTH
)) {
305 if (!value
|| !*value
) {
306 xfs_warn(mp
, "%s option requires an argument",
310 if (kstrtoint(value
, 10, &dswidth
))
312 } else if (!strcmp(this_char
, MNTOPT_32BITINODE
)) {
313 mp
->m_flags
|= XFS_MOUNT_SMALL_INUMS
;
314 } else if (!strcmp(this_char
, MNTOPT_64BITINODE
)) {
315 mp
->m_flags
&= ~XFS_MOUNT_SMALL_INUMS
;
316 } else if (!strcmp(this_char
, MNTOPT_NOUUID
)) {
317 mp
->m_flags
|= XFS_MOUNT_NOUUID
;
318 } else if (!strcmp(this_char
, MNTOPT_BARRIER
)) {
319 mp
->m_flags
|= XFS_MOUNT_BARRIER
;
320 } else if (!strcmp(this_char
, MNTOPT_NOBARRIER
)) {
321 mp
->m_flags
&= ~XFS_MOUNT_BARRIER
;
322 } else if (!strcmp(this_char
, MNTOPT_IKEEP
)) {
323 mp
->m_flags
|= XFS_MOUNT_IKEEP
;
324 } else if (!strcmp(this_char
, MNTOPT_NOIKEEP
)) {
325 mp
->m_flags
&= ~XFS_MOUNT_IKEEP
;
326 } else if (!strcmp(this_char
, MNTOPT_LARGEIO
)) {
327 mp
->m_flags
&= ~XFS_MOUNT_COMPAT_IOSIZE
;
328 } else if (!strcmp(this_char
, MNTOPT_NOLARGEIO
)) {
329 mp
->m_flags
|= XFS_MOUNT_COMPAT_IOSIZE
;
330 } else if (!strcmp(this_char
, MNTOPT_ATTR2
)) {
331 mp
->m_flags
|= XFS_MOUNT_ATTR2
;
332 } else if (!strcmp(this_char
, MNTOPT_NOATTR2
)) {
333 mp
->m_flags
&= ~XFS_MOUNT_ATTR2
;
334 mp
->m_flags
|= XFS_MOUNT_NOATTR2
;
335 } else if (!strcmp(this_char
, MNTOPT_FILESTREAM
)) {
336 mp
->m_flags
|= XFS_MOUNT_FILESTREAMS
;
337 } else if (!strcmp(this_char
, MNTOPT_NOQUOTA
)) {
338 mp
->m_qflags
&= ~XFS_ALL_QUOTA_ACCT
;
339 mp
->m_qflags
&= ~XFS_ALL_QUOTA_ENFD
;
340 mp
->m_qflags
&= ~XFS_ALL_QUOTA_ACTIVE
;
341 } else if (!strcmp(this_char
, MNTOPT_QUOTA
) ||
342 !strcmp(this_char
, MNTOPT_UQUOTA
) ||
343 !strcmp(this_char
, MNTOPT_USRQUOTA
)) {
344 mp
->m_qflags
|= (XFS_UQUOTA_ACCT
| XFS_UQUOTA_ACTIVE
|
346 } else if (!strcmp(this_char
, MNTOPT_QUOTANOENF
) ||
347 !strcmp(this_char
, MNTOPT_UQUOTANOENF
)) {
348 mp
->m_qflags
|= (XFS_UQUOTA_ACCT
| XFS_UQUOTA_ACTIVE
);
349 mp
->m_qflags
&= ~XFS_UQUOTA_ENFD
;
350 } else if (!strcmp(this_char
, MNTOPT_PQUOTA
) ||
351 !strcmp(this_char
, MNTOPT_PRJQUOTA
)) {
352 mp
->m_qflags
|= (XFS_PQUOTA_ACCT
| XFS_PQUOTA_ACTIVE
|
354 } else if (!strcmp(this_char
, MNTOPT_PQUOTANOENF
)) {
355 mp
->m_qflags
|= (XFS_PQUOTA_ACCT
| XFS_PQUOTA_ACTIVE
);
356 mp
->m_qflags
&= ~XFS_PQUOTA_ENFD
;
357 } else if (!strcmp(this_char
, MNTOPT_GQUOTA
) ||
358 !strcmp(this_char
, MNTOPT_GRPQUOTA
)) {
359 mp
->m_qflags
|= (XFS_GQUOTA_ACCT
| XFS_GQUOTA_ACTIVE
|
361 } else if (!strcmp(this_char
, MNTOPT_GQUOTANOENF
)) {
362 mp
->m_qflags
|= (XFS_GQUOTA_ACCT
| XFS_GQUOTA_ACTIVE
);
363 mp
->m_qflags
&= ~XFS_GQUOTA_ENFD
;
364 } else if (!strcmp(this_char
, MNTOPT_DELAYLOG
)) {
366 "delaylog is the default now, option is deprecated.");
367 } else if (!strcmp(this_char
, MNTOPT_NODELAYLOG
)) {
369 "nodelaylog support has been removed, option is deprecated.");
370 } else if (!strcmp(this_char
, MNTOPT_DISCARD
)) {
371 mp
->m_flags
|= XFS_MOUNT_DISCARD
;
372 } else if (!strcmp(this_char
, MNTOPT_NODISCARD
)) {
373 mp
->m_flags
&= ~XFS_MOUNT_DISCARD
;
374 } else if (!strcmp(this_char
, "ihashsize")) {
376 "ihashsize no longer used, option is deprecated.");
377 } else if (!strcmp(this_char
, "osyncisdsync")) {
379 "osyncisdsync has no effect, option is deprecated.");
380 } else if (!strcmp(this_char
, "osyncisosync")) {
382 "osyncisosync has no effect, option is deprecated.");
383 } else if (!strcmp(this_char
, "irixsgid")) {
385 "irixsgid is now a sysctl(2) variable, option is deprecated.");
387 xfs_warn(mp
, "unknown mount option [%s].", this_char
);
393 * no recovery flag requires a read-only mount
395 if ((mp
->m_flags
& XFS_MOUNT_NORECOVERY
) &&
396 !(mp
->m_flags
& XFS_MOUNT_RDONLY
)) {
397 xfs_warn(mp
, "no-recovery mounts must be read-only.");
401 if ((mp
->m_flags
& XFS_MOUNT_NOALIGN
) && (dsunit
|| dswidth
)) {
403 "sunit and swidth options incompatible with the noalign option");
407 #ifndef CONFIG_XFS_QUOTA
408 if (XFS_IS_QUOTA_RUNNING(mp
)) {
409 xfs_warn(mp
, "quota support not available in this kernel.");
414 if ((dsunit
&& !dswidth
) || (!dsunit
&& dswidth
)) {
415 xfs_warn(mp
, "sunit and swidth must be specified together");
419 if (dsunit
&& (dswidth
% dsunit
!= 0)) {
421 "stripe width (%d) must be a multiple of the stripe unit (%d)",
427 if (dsunit
&& !(mp
->m_flags
& XFS_MOUNT_NOALIGN
)) {
429 * At this point the superblock has not been read
430 * in, therefore we do not know the block size.
431 * Before the mount call ends we will convert
434 mp
->m_dalign
= dsunit
;
435 mp
->m_swidth
= dswidth
;
438 if (mp
->m_logbufs
!= -1 &&
439 mp
->m_logbufs
!= 0 &&
440 (mp
->m_logbufs
< XLOG_MIN_ICLOGS
||
441 mp
->m_logbufs
> XLOG_MAX_ICLOGS
)) {
442 xfs_warn(mp
, "invalid logbufs value: %d [not %d-%d]",
443 mp
->m_logbufs
, XLOG_MIN_ICLOGS
, XLOG_MAX_ICLOGS
);
446 if (mp
->m_logbsize
!= -1 &&
447 mp
->m_logbsize
!= 0 &&
448 (mp
->m_logbsize
< XLOG_MIN_RECORD_BSIZE
||
449 mp
->m_logbsize
> XLOG_MAX_RECORD_BSIZE
||
450 !is_power_of_2(mp
->m_logbsize
))) {
452 "invalid logbufsize: %d [not 16k,32k,64k,128k or 256k]",
458 if (iosizelog
> XFS_MAX_IO_LOG
||
459 iosizelog
< XFS_MIN_IO_LOG
) {
460 xfs_warn(mp
, "invalid log iosize: %d [not %d-%d]",
461 iosizelog
, XFS_MIN_IO_LOG
,
466 mp
->m_flags
|= XFS_MOUNT_DFLT_IOSIZE
;
467 mp
->m_readio_log
= iosizelog
;
468 mp
->m_writeio_log
= iosizelog
;
474 struct proc_xfs_info
{
481 struct xfs_mount
*mp
,
484 static struct proc_xfs_info xfs_info_set
[] = {
485 /* the few simple ones we can get from the mount struct */
486 { XFS_MOUNT_IKEEP
, "," MNTOPT_IKEEP
},
487 { XFS_MOUNT_WSYNC
, "," MNTOPT_WSYNC
},
488 { XFS_MOUNT_NOALIGN
, "," MNTOPT_NOALIGN
},
489 { XFS_MOUNT_SWALLOC
, "," MNTOPT_SWALLOC
},
490 { XFS_MOUNT_NOUUID
, "," MNTOPT_NOUUID
},
491 { XFS_MOUNT_NORECOVERY
, "," MNTOPT_NORECOVERY
},
492 { XFS_MOUNT_ATTR2
, "," MNTOPT_ATTR2
},
493 { XFS_MOUNT_FILESTREAMS
, "," MNTOPT_FILESTREAM
},
494 { XFS_MOUNT_GRPID
, "," MNTOPT_GRPID
},
495 { XFS_MOUNT_DISCARD
, "," MNTOPT_DISCARD
},
496 { XFS_MOUNT_SMALL_INUMS
, "," MNTOPT_32BITINODE
},
499 static struct proc_xfs_info xfs_info_unset
[] = {
500 /* the few simple ones we can get from the mount struct */
501 { XFS_MOUNT_COMPAT_IOSIZE
, "," MNTOPT_LARGEIO
},
502 { XFS_MOUNT_BARRIER
, "," MNTOPT_NOBARRIER
},
503 { XFS_MOUNT_SMALL_INUMS
, "," MNTOPT_64BITINODE
},
506 struct proc_xfs_info
*xfs_infop
;
508 for (xfs_infop
= xfs_info_set
; xfs_infop
->flag
; xfs_infop
++) {
509 if (mp
->m_flags
& xfs_infop
->flag
)
510 seq_puts(m
, xfs_infop
->str
);
512 for (xfs_infop
= xfs_info_unset
; xfs_infop
->flag
; xfs_infop
++) {
513 if (!(mp
->m_flags
& xfs_infop
->flag
))
514 seq_puts(m
, xfs_infop
->str
);
517 if (mp
->m_flags
& XFS_MOUNT_DFLT_IOSIZE
)
518 seq_printf(m
, "," MNTOPT_ALLOCSIZE
"=%dk",
519 (int)(1 << mp
->m_writeio_log
) >> 10);
521 if (mp
->m_logbufs
> 0)
522 seq_printf(m
, "," MNTOPT_LOGBUFS
"=%d", mp
->m_logbufs
);
523 if (mp
->m_logbsize
> 0)
524 seq_printf(m
, "," MNTOPT_LOGBSIZE
"=%dk", mp
->m_logbsize
>> 10);
527 seq_printf(m
, "," MNTOPT_LOGDEV
"=%s", mp
->m_logname
);
529 seq_printf(m
, "," MNTOPT_RTDEV
"=%s", mp
->m_rtname
);
531 if (mp
->m_dalign
> 0)
532 seq_printf(m
, "," MNTOPT_SUNIT
"=%d",
533 (int)XFS_FSB_TO_BB(mp
, mp
->m_dalign
));
534 if (mp
->m_swidth
> 0)
535 seq_printf(m
, "," MNTOPT_SWIDTH
"=%d",
536 (int)XFS_FSB_TO_BB(mp
, mp
->m_swidth
));
538 if (mp
->m_qflags
& (XFS_UQUOTA_ACCT
|XFS_UQUOTA_ENFD
))
539 seq_puts(m
, "," MNTOPT_USRQUOTA
);
540 else if (mp
->m_qflags
& XFS_UQUOTA_ACCT
)
541 seq_puts(m
, "," MNTOPT_UQUOTANOENF
);
543 if (mp
->m_qflags
& XFS_PQUOTA_ACCT
) {
544 if (mp
->m_qflags
& XFS_PQUOTA_ENFD
)
545 seq_puts(m
, "," MNTOPT_PRJQUOTA
);
547 seq_puts(m
, "," MNTOPT_PQUOTANOENF
);
549 if (mp
->m_qflags
& XFS_GQUOTA_ACCT
) {
550 if (mp
->m_qflags
& XFS_GQUOTA_ENFD
)
551 seq_puts(m
, "," MNTOPT_GRPQUOTA
);
553 seq_puts(m
, "," MNTOPT_GQUOTANOENF
);
556 if (!(mp
->m_qflags
& XFS_ALL_QUOTA_ACCT
))
557 seq_puts(m
, "," MNTOPT_NOQUOTA
);
563 unsigned int blockshift
)
565 unsigned int pagefactor
= 1;
566 unsigned int bitshift
= BITS_PER_LONG
- 1;
568 /* Figure out maximum filesize, on Linux this can depend on
569 * the filesystem blocksize (on 32 bit platforms).
570 * __block_write_begin does this in an [unsigned] long...
571 * page->index << (PAGE_CACHE_SHIFT - bbits)
572 * So, for page sized blocks (4K on 32 bit platforms),
573 * this wraps at around 8Tb (hence MAX_LFS_FILESIZE which is
574 * (((u64)PAGE_CACHE_SIZE << (BITS_PER_LONG-1))-1)
575 * but for smaller blocksizes it is less (bbits = log2 bsize).
576 * Note1: get_block_t takes a long (implicit cast from above)
577 * Note2: The Large Block Device (LBD and HAVE_SECTOR_T) patch
578 * can optionally convert the [unsigned] long from above into
579 * an [unsigned] long long.
582 #if BITS_PER_LONG == 32
583 # if defined(CONFIG_LBDAF)
584 ASSERT(sizeof(sector_t
) == 8);
585 pagefactor
= PAGE_CACHE_SIZE
;
586 bitshift
= BITS_PER_LONG
;
588 pagefactor
= PAGE_CACHE_SIZE
>> (PAGE_CACHE_SHIFT
- blockshift
);
592 return (((__uint64_t
)pagefactor
) << bitshift
) - 1;
596 * xfs_set_inode32() and xfs_set_inode64() are passed an agcount
597 * because in the growfs case, mp->m_sb.sb_agcount is not updated
598 * yet to the potentially higher ag count.
601 xfs_set_inode32(struct xfs_mount
*mp
, xfs_agnumber_t agcount
)
603 xfs_agnumber_t index
= 0;
604 xfs_agnumber_t maxagi
= 0;
605 xfs_sb_t
*sbp
= &mp
->m_sb
;
606 xfs_agnumber_t max_metadata
;
611 /* Calculate how much should be reserved for inodes to meet
612 * the max inode percentage.
614 if (mp
->m_maxicount
) {
617 icount
= sbp
->sb_dblocks
* sbp
->sb_imax_pct
;
619 icount
+= sbp
->sb_agblocks
- 1;
620 do_div(icount
, sbp
->sb_agblocks
);
621 max_metadata
= icount
;
623 max_metadata
= agcount
;
626 agino
= XFS_OFFBNO_TO_AGINO(mp
, sbp
->sb_agblocks
- 1, 0);
628 for (index
= 0; index
< agcount
; index
++) {
629 ino
= XFS_AGINO_TO_INO(mp
, index
, agino
);
631 if (ino
> XFS_MAXINUMBER_32
) {
632 pag
= xfs_perag_get(mp
, index
);
633 pag
->pagi_inodeok
= 0;
634 pag
->pagf_metadata
= 0;
639 pag
= xfs_perag_get(mp
, index
);
640 pag
->pagi_inodeok
= 1;
642 if (index
< max_metadata
)
643 pag
->pagf_metadata
= 1;
646 mp
->m_flags
|= (XFS_MOUNT_32BITINODES
|
647 XFS_MOUNT_SMALL_INUMS
);
653 xfs_set_inode64(struct xfs_mount
*mp
, xfs_agnumber_t agcount
)
655 xfs_agnumber_t index
= 0;
657 for (index
= 0; index
< agcount
; index
++) {
658 struct xfs_perag
*pag
;
660 pag
= xfs_perag_get(mp
, index
);
661 pag
->pagi_inodeok
= 1;
662 pag
->pagf_metadata
= 0;
666 /* There is no need for lock protection on m_flags,
667 * the rw_semaphore of the VFS superblock is locked
668 * during mount/umount/remount operations, so this is
669 * enough to avoid concurency on the m_flags field
671 mp
->m_flags
&= ~(XFS_MOUNT_32BITINODES
|
672 XFS_MOUNT_SMALL_INUMS
);
680 struct block_device
**bdevp
)
684 *bdevp
= blkdev_get_by_path(name
, FMODE_READ
|FMODE_WRITE
|FMODE_EXCL
,
686 if (IS_ERR(*bdevp
)) {
687 error
= PTR_ERR(*bdevp
);
688 xfs_warn(mp
, "Invalid device [%s], error=%d", name
, error
);
696 struct block_device
*bdev
)
699 blkdev_put(bdev
, FMODE_READ
|FMODE_WRITE
|FMODE_EXCL
);
703 xfs_blkdev_issue_flush(
704 xfs_buftarg_t
*buftarg
)
706 blkdev_issue_flush(buftarg
->bt_bdev
, GFP_NOFS
, NULL
);
711 struct xfs_mount
*mp
)
713 if (mp
->m_logdev_targp
&& mp
->m_logdev_targp
!= mp
->m_ddev_targp
) {
714 struct block_device
*logdev
= mp
->m_logdev_targp
->bt_bdev
;
715 xfs_free_buftarg(mp
, mp
->m_logdev_targp
);
716 xfs_blkdev_put(logdev
);
718 if (mp
->m_rtdev_targp
) {
719 struct block_device
*rtdev
= mp
->m_rtdev_targp
->bt_bdev
;
720 xfs_free_buftarg(mp
, mp
->m_rtdev_targp
);
721 xfs_blkdev_put(rtdev
);
723 xfs_free_buftarg(mp
, mp
->m_ddev_targp
);
727 * The file system configurations are:
728 * (1) device (partition) with data and internal log
729 * (2) logical volume with data and log subvolumes.
730 * (3) logical volume with data, log, and realtime subvolumes.
732 * We only have to handle opening the log and realtime volumes here if
733 * they are present. The data subvolume has already been opened by
734 * get_sb_bdev() and is stored in sb->s_bdev.
738 struct xfs_mount
*mp
)
740 struct block_device
*ddev
= mp
->m_super
->s_bdev
;
741 struct block_device
*logdev
= NULL
, *rtdev
= NULL
;
745 * Open real time and log devices - order is important.
748 error
= xfs_blkdev_get(mp
, mp
->m_logname
, &logdev
);
754 error
= xfs_blkdev_get(mp
, mp
->m_rtname
, &rtdev
);
756 goto out_close_logdev
;
758 if (rtdev
== ddev
|| rtdev
== logdev
) {
760 "Cannot mount filesystem with identical rtdev and ddev/logdev.");
762 goto out_close_rtdev
;
767 * Setup xfs_mount buffer target pointers
770 mp
->m_ddev_targp
= xfs_alloc_buftarg(mp
, ddev
);
771 if (!mp
->m_ddev_targp
)
772 goto out_close_rtdev
;
775 mp
->m_rtdev_targp
= xfs_alloc_buftarg(mp
, rtdev
);
776 if (!mp
->m_rtdev_targp
)
777 goto out_free_ddev_targ
;
780 if (logdev
&& logdev
!= ddev
) {
781 mp
->m_logdev_targp
= xfs_alloc_buftarg(mp
, logdev
);
782 if (!mp
->m_logdev_targp
)
783 goto out_free_rtdev_targ
;
785 mp
->m_logdev_targp
= mp
->m_ddev_targp
;
791 if (mp
->m_rtdev_targp
)
792 xfs_free_buftarg(mp
, mp
->m_rtdev_targp
);
794 xfs_free_buftarg(mp
, mp
->m_ddev_targp
);
796 xfs_blkdev_put(rtdev
);
798 if (logdev
&& logdev
!= ddev
)
799 xfs_blkdev_put(logdev
);
805 * Setup xfs_mount buffer target pointers based on superblock
809 struct xfs_mount
*mp
)
813 error
= xfs_setsize_buftarg(mp
->m_ddev_targp
, mp
->m_sb
.sb_sectsize
);
817 if (mp
->m_logdev_targp
&& mp
->m_logdev_targp
!= mp
->m_ddev_targp
) {
818 unsigned int log_sector_size
= BBSIZE
;
820 if (xfs_sb_version_hassector(&mp
->m_sb
))
821 log_sector_size
= mp
->m_sb
.sb_logsectsize
;
822 error
= xfs_setsize_buftarg(mp
->m_logdev_targp
,
827 if (mp
->m_rtdev_targp
) {
828 error
= xfs_setsize_buftarg(mp
->m_rtdev_targp
,
829 mp
->m_sb
.sb_sectsize
);
838 xfs_init_mount_workqueues(
839 struct xfs_mount
*mp
)
841 mp
->m_buf_workqueue
= alloc_workqueue("xfs-buf/%s",
842 WQ_MEM_RECLAIM
|WQ_FREEZABLE
, 1, mp
->m_fsname
);
843 if (!mp
->m_buf_workqueue
)
846 mp
->m_data_workqueue
= alloc_workqueue("xfs-data/%s",
847 WQ_MEM_RECLAIM
|WQ_FREEZABLE
, 0, mp
->m_fsname
);
848 if (!mp
->m_data_workqueue
)
849 goto out_destroy_buf
;
851 mp
->m_unwritten_workqueue
= alloc_workqueue("xfs-conv/%s",
852 WQ_MEM_RECLAIM
|WQ_FREEZABLE
, 0, mp
->m_fsname
);
853 if (!mp
->m_unwritten_workqueue
)
854 goto out_destroy_data_iodone_queue
;
856 mp
->m_cil_workqueue
= alloc_workqueue("xfs-cil/%s",
857 WQ_MEM_RECLAIM
|WQ_FREEZABLE
, 0, mp
->m_fsname
);
858 if (!mp
->m_cil_workqueue
)
859 goto out_destroy_unwritten
;
861 mp
->m_reclaim_workqueue
= alloc_workqueue("xfs-reclaim/%s",
862 WQ_FREEZABLE
, 0, mp
->m_fsname
);
863 if (!mp
->m_reclaim_workqueue
)
864 goto out_destroy_cil
;
866 mp
->m_log_workqueue
= alloc_workqueue("xfs-log/%s",
867 WQ_FREEZABLE
|WQ_HIGHPRI
, 0, mp
->m_fsname
);
868 if (!mp
->m_log_workqueue
)
869 goto out_destroy_reclaim
;
871 mp
->m_eofblocks_workqueue
= alloc_workqueue("xfs-eofblocks/%s",
872 WQ_FREEZABLE
, 0, mp
->m_fsname
);
873 if (!mp
->m_eofblocks_workqueue
)
874 goto out_destroy_log
;
879 destroy_workqueue(mp
->m_log_workqueue
);
881 destroy_workqueue(mp
->m_reclaim_workqueue
);
883 destroy_workqueue(mp
->m_cil_workqueue
);
884 out_destroy_unwritten
:
885 destroy_workqueue(mp
->m_unwritten_workqueue
);
886 out_destroy_data_iodone_queue
:
887 destroy_workqueue(mp
->m_data_workqueue
);
889 destroy_workqueue(mp
->m_buf_workqueue
);
895 xfs_destroy_mount_workqueues(
896 struct xfs_mount
*mp
)
898 destroy_workqueue(mp
->m_eofblocks_workqueue
);
899 destroy_workqueue(mp
->m_log_workqueue
);
900 destroy_workqueue(mp
->m_reclaim_workqueue
);
901 destroy_workqueue(mp
->m_cil_workqueue
);
902 destroy_workqueue(mp
->m_data_workqueue
);
903 destroy_workqueue(mp
->m_unwritten_workqueue
);
904 destroy_workqueue(mp
->m_buf_workqueue
);
908 * Flush all dirty data to disk. Must not be called while holding an XFS_ILOCK
909 * or a page lock. We use sync_inodes_sb() here to ensure we block while waiting
910 * for IO to complete so that we effectively throttle multiple callers to the
911 * rate at which IO is completing.
915 struct xfs_mount
*mp
)
917 struct super_block
*sb
= mp
->m_super
;
919 if (down_read_trylock(&sb
->s_umount
)) {
921 up_read(&sb
->s_umount
);
925 /* Catch misguided souls that try to use this interface on XFS */
926 STATIC
struct inode
*
928 struct super_block
*sb
)
935 * Now that the generic code is guaranteed not to be accessing
936 * the linux inode, we can reclaim the inode.
939 xfs_fs_destroy_inode(
942 struct xfs_inode
*ip
= XFS_I(inode
);
944 trace_xfs_destroy_inode(ip
);
946 XFS_STATS_INC(vn_reclaim
);
948 ASSERT(XFS_FORCED_SHUTDOWN(ip
->i_mount
) || ip
->i_delayed_blks
== 0);
951 * We should never get here with one of the reclaim flags already set.
953 ASSERT_ALWAYS(!xfs_iflags_test(ip
, XFS_IRECLAIMABLE
));
954 ASSERT_ALWAYS(!xfs_iflags_test(ip
, XFS_IRECLAIM
));
957 * We always use background reclaim here because even if the
958 * inode is clean, it still may be under IO and hence we have
959 * to take the flush lock. The background reclaim path handles
960 * this more efficiently than we can here, so simply let background
961 * reclaim tear down all inodes.
963 xfs_inode_set_reclaim_tag(ip
);
967 * Slab object creation initialisation for the XFS inode.
968 * This covers only the idempotent fields in the XFS inode;
969 * all other fields need to be initialised on allocation
970 * from the slab. This avoids the need to repeatedly initialise
971 * fields in the xfs inode that left in the initialise state
972 * when freeing the inode.
975 xfs_fs_inode_init_once(
978 struct xfs_inode
*ip
= inode
;
980 memset(ip
, 0, sizeof(struct xfs_inode
));
983 inode_init_once(VFS_I(ip
));
986 atomic_set(&ip
->i_pincount
, 0);
987 spin_lock_init(&ip
->i_flags_lock
);
989 mrlock_init(&ip
->i_lock
, MRLOCK_ALLOW_EQUAL_PRI
|MRLOCK_BARRIER
,
990 "xfsino", ip
->i_ino
);
997 xfs_inode_t
*ip
= XFS_I(inode
);
999 ASSERT(!rwsem_is_locked(&ip
->i_iolock
.mr_lock
));
1001 trace_xfs_evict_inode(ip
);
1003 truncate_inode_pages_final(&inode
->i_data
);
1005 XFS_STATS_INC(vn_rele
);
1006 XFS_STATS_INC(vn_remove
);
1012 * We do an unlocked check for XFS_IDONTCACHE here because we are already
1013 * serialised against cache hits here via the inode->i_lock and igrab() in
1014 * xfs_iget_cache_hit(). Hence a lookup that might clear this flag will not be
1015 * racing with us, and it avoids needing to grab a spinlock here for every inode
1016 * we drop the final reference on.
1020 struct inode
*inode
)
1022 struct xfs_inode
*ip
= XFS_I(inode
);
1024 return generic_drop_inode(inode
) || (ip
->i_flags
& XFS_IDONTCACHE
);
1029 struct xfs_mount
*mp
)
1031 kfree(mp
->m_fsname
);
1032 kfree(mp
->m_rtname
);
1033 kfree(mp
->m_logname
);
1038 struct super_block
*sb
)
1040 struct xfs_mount
*mp
= XFS_M(sb
);
1042 xfs_filestream_unmount(mp
);
1046 xfs_icsb_destroy_counters(mp
);
1047 xfs_destroy_mount_workqueues(mp
);
1048 xfs_close_devices(mp
);
1049 xfs_free_fsname(mp
);
1055 struct super_block
*sb
,
1058 struct xfs_mount
*mp
= XFS_M(sb
);
1061 * Doing anything during the async pass would be counterproductive.
1066 xfs_log_force(mp
, XFS_LOG_SYNC
);
1069 * The disk must be active because we're syncing.
1070 * We schedule log work now (now that the disk is
1071 * active) instead of later (when it might not be).
1073 flush_delayed_work(&mp
->m_log
->l_work
);
1081 struct dentry
*dentry
,
1082 struct kstatfs
*statp
)
1084 struct xfs_mount
*mp
= XFS_M(dentry
->d_sb
);
1085 xfs_sb_t
*sbp
= &mp
->m_sb
;
1086 struct xfs_inode
*ip
= XFS_I(dentry
->d_inode
);
1087 __uint64_t fakeinos
, id
;
1091 statp
->f_type
= XFS_SB_MAGIC
;
1092 statp
->f_namelen
= MAXNAMELEN
- 1;
1094 id
= huge_encode_dev(mp
->m_ddev_targp
->bt_dev
);
1095 statp
->f_fsid
.val
[0] = (u32
)id
;
1096 statp
->f_fsid
.val
[1] = (u32
)(id
>> 32);
1098 xfs_icsb_sync_counters(mp
, XFS_ICSB_LAZY_COUNT
);
1100 spin_lock(&mp
->m_sb_lock
);
1101 statp
->f_bsize
= sbp
->sb_blocksize
;
1102 lsize
= sbp
->sb_logstart
? sbp
->sb_logblocks
: 0;
1103 statp
->f_blocks
= sbp
->sb_dblocks
- lsize
;
1104 statp
->f_bfree
= statp
->f_bavail
=
1105 sbp
->sb_fdblocks
- XFS_ALLOC_SET_ASIDE(mp
);
1106 fakeinos
= statp
->f_bfree
<< sbp
->sb_inopblog
;
1108 MIN(sbp
->sb_icount
+ fakeinos
, (__uint64_t
)XFS_MAXINUMBER
);
1109 if (mp
->m_maxicount
)
1110 statp
->f_files
= min_t(typeof(statp
->f_files
),
1114 /* If sb_icount overshot maxicount, report actual allocation */
1115 statp
->f_files
= max_t(typeof(statp
->f_files
),
1119 /* make sure statp->f_ffree does not underflow */
1120 ffree
= statp
->f_files
- (sbp
->sb_icount
- sbp
->sb_ifree
);
1121 statp
->f_ffree
= max_t(__int64_t
, ffree
, 0);
1123 spin_unlock(&mp
->m_sb_lock
);
1125 if ((ip
->i_d
.di_flags
& XFS_DIFLAG_PROJINHERIT
) &&
1126 ((mp
->m_qflags
& (XFS_PQUOTA_ACCT
|XFS_PQUOTA_ENFD
))) ==
1127 (XFS_PQUOTA_ACCT
|XFS_PQUOTA_ENFD
))
1128 xfs_qm_statvfs(ip
, statp
);
1133 xfs_save_resvblks(struct xfs_mount
*mp
)
1135 __uint64_t resblks
= 0;
1137 mp
->m_resblks_save
= mp
->m_resblks
;
1138 xfs_reserve_blocks(mp
, &resblks
, NULL
);
1142 xfs_restore_resvblks(struct xfs_mount
*mp
)
1146 if (mp
->m_resblks_save
) {
1147 resblks
= mp
->m_resblks_save
;
1148 mp
->m_resblks_save
= 0;
1150 resblks
= xfs_default_resblks(mp
);
1152 xfs_reserve_blocks(mp
, &resblks
, NULL
);
1156 * Trigger writeback of all the dirty metadata in the file system.
1158 * This ensures that the metadata is written to their location on disk rather
1159 * than just existing in transactions in the log. This means after a quiesce
1160 * there is no log replay required to write the inodes to disk - this is the
1161 * primary difference between a sync and a quiesce.
1163 * Note: xfs_log_quiesce() stops background log work - the callers must ensure
1164 * it is started again when appropriate.
1168 struct xfs_mount
*mp
)
1172 /* wait for all modifications to complete */
1173 while (atomic_read(&mp
->m_active_trans
) > 0)
1176 /* force the log to unpin objects from the now complete transactions */
1177 xfs_log_force(mp
, XFS_LOG_SYNC
);
1179 /* reclaim inodes to do any IO before the freeze completes */
1180 xfs_reclaim_inodes(mp
, 0);
1181 xfs_reclaim_inodes(mp
, SYNC_WAIT
);
1183 /* Push the superblock and write an unmount record */
1184 error
= xfs_log_sbcount(mp
);
1186 xfs_warn(mp
, "xfs_attr_quiesce: failed to log sb changes. "
1187 "Frozen image may not be consistent.");
1189 * Just warn here till VFS can correctly support
1190 * read-only remount without racing.
1192 WARN_ON(atomic_read(&mp
->m_active_trans
) != 0);
1194 xfs_log_quiesce(mp
);
1199 struct super_block
*sb
,
1203 struct xfs_mount
*mp
= XFS_M(sb
);
1204 xfs_sb_t
*sbp
= &mp
->m_sb
;
1205 substring_t args
[MAX_OPT_ARGS
];
1209 sync_filesystem(sb
);
1210 while ((p
= strsep(&options
, ",")) != NULL
) {
1216 token
= match_token(p
, tokens
, args
);
1219 mp
->m_flags
|= XFS_MOUNT_BARRIER
;
1222 mp
->m_flags
&= ~XFS_MOUNT_BARRIER
;
1225 mp
->m_maxagi
= xfs_set_inode64(mp
, sbp
->sb_agcount
);
1228 mp
->m_maxagi
= xfs_set_inode32(mp
, sbp
->sb_agcount
);
1232 * Logically we would return an error here to prevent
1233 * users from believing they might have changed
1234 * mount options using remount which can't be changed.
1236 * But unfortunately mount(8) adds all options from
1237 * mtab and fstab to the mount arguments in some cases
1238 * so we can't blindly reject options, but have to
1239 * check for each specified option if it actually
1240 * differs from the currently set option and only
1241 * reject it if that's the case.
1243 * Until that is implemented we return success for
1244 * every remount request, and silently ignore all
1245 * options that we can't actually change.
1249 "mount option \"%s\" not supported for remount", p
);
1258 if ((mp
->m_flags
& XFS_MOUNT_RDONLY
) && !(*flags
& MS_RDONLY
)) {
1259 mp
->m_flags
&= ~XFS_MOUNT_RDONLY
;
1262 * If this is the first remount to writeable state we
1263 * might have some superblock changes to update.
1265 if (mp
->m_update_sb
) {
1266 error
= xfs_sync_sb(mp
, false);
1268 xfs_warn(mp
, "failed to write sb changes");
1271 mp
->m_update_sb
= false;
1275 * Fill out the reserve pool if it is empty. Use the stashed
1276 * value if it is non-zero, otherwise go with the default.
1278 xfs_restore_resvblks(mp
);
1279 xfs_log_work_queue(mp
);
1283 if (!(mp
->m_flags
& XFS_MOUNT_RDONLY
) && (*flags
& MS_RDONLY
)) {
1285 * Before we sync the metadata, we need to free up the reserve
1286 * block pool so that the used block count in the superblock on
1287 * disk is correct at the end of the remount. Stash the current
1288 * reserve pool size so that if we get remounted rw, we can
1289 * return it to the same size.
1291 xfs_save_resvblks(mp
);
1292 xfs_quiesce_attr(mp
);
1293 mp
->m_flags
|= XFS_MOUNT_RDONLY
;
1300 * Second stage of a freeze. The data is already frozen so we only
1301 * need to take care of the metadata. Once that's done sync the superblock
1302 * to the log to dirty it in case of a crash while frozen. This ensures that we
1303 * will recover the unlinked inode lists on the next mount.
1307 struct super_block
*sb
)
1309 struct xfs_mount
*mp
= XFS_M(sb
);
1311 xfs_save_resvblks(mp
);
1312 xfs_quiesce_attr(mp
);
1313 return xfs_sync_sb(mp
, true);
1318 struct super_block
*sb
)
1320 struct xfs_mount
*mp
= XFS_M(sb
);
1322 xfs_restore_resvblks(mp
);
1323 xfs_log_work_queue(mp
);
1328 xfs_fs_show_options(
1330 struct dentry
*root
)
1332 return xfs_showargs(XFS_M(root
->d_sb
), m
);
1336 * This function fills in xfs_mount_t fields based on mount args.
1337 * Note: the superblock _has_ now been read in.
1341 struct xfs_mount
*mp
)
1343 int ronly
= (mp
->m_flags
& XFS_MOUNT_RDONLY
);
1345 /* Fail a mount where the logbuf is smaller than the log stripe */
1346 if (xfs_sb_version_haslogv2(&mp
->m_sb
)) {
1347 if (mp
->m_logbsize
<= 0 &&
1348 mp
->m_sb
.sb_logsunit
> XLOG_BIG_RECORD_BSIZE
) {
1349 mp
->m_logbsize
= mp
->m_sb
.sb_logsunit
;
1350 } else if (mp
->m_logbsize
> 0 &&
1351 mp
->m_logbsize
< mp
->m_sb
.sb_logsunit
) {
1353 "logbuf size must be greater than or equal to log stripe size");
1357 /* Fail a mount if the logbuf is larger than 32K */
1358 if (mp
->m_logbsize
> XLOG_BIG_RECORD_BSIZE
) {
1360 "logbuf size for version 1 logs must be 16K or 32K");
1366 * V5 filesystems always use attr2 format for attributes.
1368 if (xfs_sb_version_hascrc(&mp
->m_sb
) &&
1369 (mp
->m_flags
& XFS_MOUNT_NOATTR2
)) {
1371 "Cannot mount a V5 filesystem as %s. %s is always enabled for V5 filesystems.",
1372 MNTOPT_NOATTR2
, MNTOPT_ATTR2
);
1377 * mkfs'ed attr2 will turn on attr2 mount unless explicitly
1378 * told by noattr2 to turn it off
1380 if (xfs_sb_version_hasattr2(&mp
->m_sb
) &&
1381 !(mp
->m_flags
& XFS_MOUNT_NOATTR2
))
1382 mp
->m_flags
|= XFS_MOUNT_ATTR2
;
1385 * prohibit r/w mounts of read-only filesystems
1387 if ((mp
->m_sb
.sb_flags
& XFS_SBF_READONLY
) && !ronly
) {
1389 "cannot mount a read-only filesystem as read-write");
1393 if ((mp
->m_qflags
& (XFS_GQUOTA_ACCT
| XFS_GQUOTA_ACTIVE
)) &&
1394 (mp
->m_qflags
& (XFS_PQUOTA_ACCT
| XFS_PQUOTA_ACTIVE
)) &&
1395 !xfs_sb_version_has_pquotino(&mp
->m_sb
)) {
1397 "Super block does not support project and group quota together");
1406 struct super_block
*sb
,
1411 struct xfs_mount
*mp
= NULL
;
1412 int flags
= 0, error
= -ENOMEM
;
1414 mp
= kzalloc(sizeof(struct xfs_mount
), GFP_KERNEL
);
1418 spin_lock_init(&mp
->m_sb_lock
);
1419 mutex_init(&mp
->m_growlock
);
1420 atomic_set(&mp
->m_active_trans
, 0);
1421 INIT_DELAYED_WORK(&mp
->m_reclaim_work
, xfs_reclaim_worker
);
1422 INIT_DELAYED_WORK(&mp
->m_eofblocks_work
, xfs_eofblocks_worker
);
1423 mp
->m_kobj
.kobject
.kset
= xfs_kset
;
1428 error
= xfs_parseargs(mp
, (char *)data
);
1430 goto out_free_fsname
;
1432 sb_min_blocksize(sb
, BBSIZE
);
1433 sb
->s_xattr
= xfs_xattr_handlers
;
1434 sb
->s_export_op
= &xfs_export_operations
;
1435 #ifdef CONFIG_XFS_QUOTA
1436 sb
->s_qcop
= &xfs_quotactl_operations
;
1437 sb
->s_quota_types
= QTYPE_MASK_USR
| QTYPE_MASK_GRP
| QTYPE_MASK_PRJ
;
1439 sb
->s_op
= &xfs_super_operations
;
1442 flags
|= XFS_MFSI_QUIET
;
1444 error
= xfs_open_devices(mp
);
1446 goto out_free_fsname
;
1448 error
= xfs_init_mount_workqueues(mp
);
1450 goto out_close_devices
;
1452 error
= xfs_icsb_init_counters(mp
);
1454 goto out_destroy_workqueues
;
1456 error
= xfs_readsb(mp
, flags
);
1458 goto out_destroy_counters
;
1460 error
= xfs_finish_flags(mp
);
1464 error
= xfs_setup_devices(mp
);
1468 error
= xfs_filestream_mount(mp
);
1473 * we must configure the block size in the superblock before we run the
1474 * full mount process as the mount process can lookup and cache inodes.
1476 sb
->s_magic
= XFS_SB_MAGIC
;
1477 sb
->s_blocksize
= mp
->m_sb
.sb_blocksize
;
1478 sb
->s_blocksize_bits
= ffs(sb
->s_blocksize
) - 1;
1479 sb
->s_maxbytes
= xfs_max_file_offset(sb
->s_blocksize_bits
);
1480 sb
->s_max_links
= XFS_MAXLINK
;
1481 sb
->s_time_gran
= 1;
1482 set_posix_acl_flag(sb
);
1484 /* version 5 superblocks support inode version counters. */
1485 if (XFS_SB_VERSION_NUM(&mp
->m_sb
) == XFS_SB_VERSION_5
)
1486 sb
->s_flags
|= MS_I_VERSION
;
1488 error
= xfs_mountfs(mp
);
1490 goto out_filestream_unmount
;
1492 root
= igrab(VFS_I(mp
->m_rootip
));
1497 sb
->s_root
= d_make_root(root
);
1505 out_filestream_unmount
:
1506 xfs_filestream_unmount(mp
);
1509 out_destroy_counters
:
1510 xfs_icsb_destroy_counters(mp
);
1511 out_destroy_workqueues
:
1512 xfs_destroy_mount_workqueues(mp
);
1514 xfs_close_devices(mp
);
1516 xfs_free_fsname(mp
);
1522 xfs_filestream_unmount(mp
);
1527 STATIC
struct dentry
*
1529 struct file_system_type
*fs_type
,
1531 const char *dev_name
,
1534 return mount_bdev(fs_type
, flags
, dev_name
, data
, xfs_fs_fill_super
);
1538 xfs_fs_nr_cached_objects(
1539 struct super_block
*sb
,
1540 struct shrink_control
*sc
)
1542 return xfs_reclaim_inodes_count(XFS_M(sb
));
1546 xfs_fs_free_cached_objects(
1547 struct super_block
*sb
,
1548 struct shrink_control
*sc
)
1550 return xfs_reclaim_inodes_nr(XFS_M(sb
), sc
->nr_to_scan
);
1553 static const struct super_operations xfs_super_operations
= {
1554 .alloc_inode
= xfs_fs_alloc_inode
,
1555 .destroy_inode
= xfs_fs_destroy_inode
,
1556 .evict_inode
= xfs_fs_evict_inode
,
1557 .drop_inode
= xfs_fs_drop_inode
,
1558 .put_super
= xfs_fs_put_super
,
1559 .sync_fs
= xfs_fs_sync_fs
,
1560 .freeze_fs
= xfs_fs_freeze
,
1561 .unfreeze_fs
= xfs_fs_unfreeze
,
1562 .statfs
= xfs_fs_statfs
,
1563 .remount_fs
= xfs_fs_remount
,
1564 .show_options
= xfs_fs_show_options
,
1565 .nr_cached_objects
= xfs_fs_nr_cached_objects
,
1566 .free_cached_objects
= xfs_fs_free_cached_objects
,
1569 static struct file_system_type xfs_fs_type
= {
1570 .owner
= THIS_MODULE
,
1572 .mount
= xfs_fs_mount
,
1573 .kill_sb
= kill_block_super
,
1574 .fs_flags
= FS_REQUIRES_DEV
,
1576 MODULE_ALIAS_FS("xfs");
1579 xfs_init_zones(void)
1582 xfs_ioend_zone
= kmem_zone_init(sizeof(xfs_ioend_t
), "xfs_ioend");
1583 if (!xfs_ioend_zone
)
1586 xfs_ioend_pool
= mempool_create_slab_pool(4 * MAX_BUF_PER_PAGE
,
1588 if (!xfs_ioend_pool
)
1589 goto out_destroy_ioend_zone
;
1591 xfs_log_ticket_zone
= kmem_zone_init(sizeof(xlog_ticket_t
),
1593 if (!xfs_log_ticket_zone
)
1594 goto out_destroy_ioend_pool
;
1596 xfs_bmap_free_item_zone
= kmem_zone_init(sizeof(xfs_bmap_free_item_t
),
1597 "xfs_bmap_free_item");
1598 if (!xfs_bmap_free_item_zone
)
1599 goto out_destroy_log_ticket_zone
;
1601 xfs_btree_cur_zone
= kmem_zone_init(sizeof(xfs_btree_cur_t
),
1603 if (!xfs_btree_cur_zone
)
1604 goto out_destroy_bmap_free_item_zone
;
1606 xfs_da_state_zone
= kmem_zone_init(sizeof(xfs_da_state_t
),
1608 if (!xfs_da_state_zone
)
1609 goto out_destroy_btree_cur_zone
;
1611 xfs_ifork_zone
= kmem_zone_init(sizeof(xfs_ifork_t
), "xfs_ifork");
1612 if (!xfs_ifork_zone
)
1613 goto out_destroy_da_state_zone
;
1615 xfs_trans_zone
= kmem_zone_init(sizeof(xfs_trans_t
), "xfs_trans");
1616 if (!xfs_trans_zone
)
1617 goto out_destroy_ifork_zone
;
1619 xfs_log_item_desc_zone
=
1620 kmem_zone_init(sizeof(struct xfs_log_item_desc
),
1621 "xfs_log_item_desc");
1622 if (!xfs_log_item_desc_zone
)
1623 goto out_destroy_trans_zone
;
1626 * The size of the zone allocated buf log item is the maximum
1627 * size possible under XFS. This wastes a little bit of memory,
1628 * but it is much faster.
1630 xfs_buf_item_zone
= kmem_zone_init(sizeof(struct xfs_buf_log_item
),
1632 if (!xfs_buf_item_zone
)
1633 goto out_destroy_log_item_desc_zone
;
1635 xfs_efd_zone
= kmem_zone_init((sizeof(xfs_efd_log_item_t
) +
1636 ((XFS_EFD_MAX_FAST_EXTENTS
- 1) *
1637 sizeof(xfs_extent_t
))), "xfs_efd_item");
1639 goto out_destroy_buf_item_zone
;
1641 xfs_efi_zone
= kmem_zone_init((sizeof(xfs_efi_log_item_t
) +
1642 ((XFS_EFI_MAX_FAST_EXTENTS
- 1) *
1643 sizeof(xfs_extent_t
))), "xfs_efi_item");
1645 goto out_destroy_efd_zone
;
1648 kmem_zone_init_flags(sizeof(xfs_inode_t
), "xfs_inode",
1649 KM_ZONE_HWALIGN
| KM_ZONE_RECLAIM
| KM_ZONE_SPREAD
,
1650 xfs_fs_inode_init_once
);
1651 if (!xfs_inode_zone
)
1652 goto out_destroy_efi_zone
;
1655 kmem_zone_init_flags(sizeof(xfs_inode_log_item_t
), "xfs_ili",
1656 KM_ZONE_SPREAD
, NULL
);
1658 goto out_destroy_inode_zone
;
1659 xfs_icreate_zone
= kmem_zone_init(sizeof(struct xfs_icreate_item
),
1661 if (!xfs_icreate_zone
)
1662 goto out_destroy_ili_zone
;
1666 out_destroy_ili_zone
:
1667 kmem_zone_destroy(xfs_ili_zone
);
1668 out_destroy_inode_zone
:
1669 kmem_zone_destroy(xfs_inode_zone
);
1670 out_destroy_efi_zone
:
1671 kmem_zone_destroy(xfs_efi_zone
);
1672 out_destroy_efd_zone
:
1673 kmem_zone_destroy(xfs_efd_zone
);
1674 out_destroy_buf_item_zone
:
1675 kmem_zone_destroy(xfs_buf_item_zone
);
1676 out_destroy_log_item_desc_zone
:
1677 kmem_zone_destroy(xfs_log_item_desc_zone
);
1678 out_destroy_trans_zone
:
1679 kmem_zone_destroy(xfs_trans_zone
);
1680 out_destroy_ifork_zone
:
1681 kmem_zone_destroy(xfs_ifork_zone
);
1682 out_destroy_da_state_zone
:
1683 kmem_zone_destroy(xfs_da_state_zone
);
1684 out_destroy_btree_cur_zone
:
1685 kmem_zone_destroy(xfs_btree_cur_zone
);
1686 out_destroy_bmap_free_item_zone
:
1687 kmem_zone_destroy(xfs_bmap_free_item_zone
);
1688 out_destroy_log_ticket_zone
:
1689 kmem_zone_destroy(xfs_log_ticket_zone
);
1690 out_destroy_ioend_pool
:
1691 mempool_destroy(xfs_ioend_pool
);
1692 out_destroy_ioend_zone
:
1693 kmem_zone_destroy(xfs_ioend_zone
);
1699 xfs_destroy_zones(void)
1702 * Make sure all delayed rcu free are flushed before we
1706 kmem_zone_destroy(xfs_icreate_zone
);
1707 kmem_zone_destroy(xfs_ili_zone
);
1708 kmem_zone_destroy(xfs_inode_zone
);
1709 kmem_zone_destroy(xfs_efi_zone
);
1710 kmem_zone_destroy(xfs_efd_zone
);
1711 kmem_zone_destroy(xfs_buf_item_zone
);
1712 kmem_zone_destroy(xfs_log_item_desc_zone
);
1713 kmem_zone_destroy(xfs_trans_zone
);
1714 kmem_zone_destroy(xfs_ifork_zone
);
1715 kmem_zone_destroy(xfs_da_state_zone
);
1716 kmem_zone_destroy(xfs_btree_cur_zone
);
1717 kmem_zone_destroy(xfs_bmap_free_item_zone
);
1718 kmem_zone_destroy(xfs_log_ticket_zone
);
1719 mempool_destroy(xfs_ioend_pool
);
1720 kmem_zone_destroy(xfs_ioend_zone
);
1725 xfs_init_workqueues(void)
1728 * The allocation workqueue can be used in memory reclaim situations
1729 * (writepage path), and parallelism is only limited by the number of
1730 * AGs in all the filesystems mounted. Hence use the default large
1731 * max_active value for this workqueue.
1733 xfs_alloc_wq
= alloc_workqueue("xfsalloc",
1734 WQ_MEM_RECLAIM
|WQ_FREEZABLE
, 0);
1742 xfs_destroy_workqueues(void)
1744 destroy_workqueue(xfs_alloc_wq
);
1752 printk(KERN_INFO XFS_VERSION_STRING
" with "
1753 XFS_BUILD_OPTIONS
" enabled\n");
1757 error
= xfs_init_zones();
1761 error
= xfs_init_workqueues();
1763 goto out_destroy_zones
;
1765 error
= xfs_mru_cache_init();
1767 goto out_destroy_wq
;
1769 error
= xfs_buf_init();
1771 goto out_mru_cache_uninit
;
1773 error
= xfs_init_procfs();
1775 goto out_buf_terminate
;
1777 error
= xfs_sysctl_register();
1779 goto out_cleanup_procfs
;
1781 xfs_kset
= kset_create_and_add("xfs", NULL
, fs_kobj
);
1784 goto out_sysctl_unregister
;;
1788 xfs_dbg_kobj
.kobject
.kset
= xfs_kset
;
1789 error
= xfs_sysfs_init(&xfs_dbg_kobj
, &xfs_dbg_ktype
, NULL
, "debug");
1791 goto out_kset_unregister
;
1794 error
= xfs_qm_init();
1796 goto out_remove_kobj
;
1798 error
= register_filesystem(&xfs_fs_type
);
1807 xfs_sysfs_del(&xfs_dbg_kobj
);
1808 out_kset_unregister
:
1810 kset_unregister(xfs_kset
);
1811 out_sysctl_unregister
:
1812 xfs_sysctl_unregister();
1814 xfs_cleanup_procfs();
1816 xfs_buf_terminate();
1817 out_mru_cache_uninit
:
1818 xfs_mru_cache_uninit();
1820 xfs_destroy_workqueues();
1822 xfs_destroy_zones();
1831 unregister_filesystem(&xfs_fs_type
);
1833 xfs_sysfs_del(&xfs_dbg_kobj
);
1835 kset_unregister(xfs_kset
);
1836 xfs_sysctl_unregister();
1837 xfs_cleanup_procfs();
1838 xfs_buf_terminate();
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");