2 * Copyright (c) 2000-2006 Silicon Graphics, Inc.
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
7 * published by the Free Software Foundation.
9 * This program is distributed in the hope that it would be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write the Free Software Foundation,
16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
23 #include "xfs_trans.h"
27 #include "xfs_alloc.h"
28 #include "xfs_dmapi.h"
29 #include "xfs_quota.h"
30 #include "xfs_mount.h"
31 #include "xfs_bmap_btree.h"
32 #include "xfs_alloc_btree.h"
33 #include "xfs_ialloc_btree.h"
34 #include "xfs_dir2_sf.h"
35 #include "xfs_attr_sf.h"
36 #include "xfs_dinode.h"
37 #include "xfs_inode.h"
38 #include "xfs_btree.h"
39 #include "xfs_btree_trace.h"
40 #include "xfs_ialloc.h"
42 #include "xfs_rtalloc.h"
43 #include "xfs_error.h"
44 #include "xfs_itable.h"
45 #include "xfs_fsops.h"
48 #include "xfs_buf_item.h"
49 #include "xfs_utils.h"
50 #include "xfs_vnodeops.h"
51 #include "xfs_version.h"
52 #include "xfs_log_priv.h"
53 #include "xfs_trans_priv.h"
54 #include "xfs_filestream.h"
55 #include "xfs_da_btree.h"
56 #include "xfs_extfree_item.h"
57 #include "xfs_mru_cache.h"
58 #include "xfs_inode_item.h"
60 #include "xfs_trace.h"
62 #include <linux/namei.h>
63 #include <linux/init.h>
64 #include <linux/slab.h>
65 #include <linux/mount.h>
66 #include <linux/mempool.h>
67 #include <linux/writeback.h>
68 #include <linux/kthread.h>
69 #include <linux/freezer.h>
70 #include <linux/parser.h>
72 static const struct super_operations xfs_super_operations;
73 static kmem_zone_t *xfs_ioend_zone;
74 mempool_t *xfs_ioend_pool;
76 #define MNTOPT_LOGBUFS "logbufs" /* number of XFS log buffers */
77 #define MNTOPT_LOGBSIZE "logbsize" /* size of XFS log buffers */
78 #define MNTOPT_LOGDEV "logdev" /* log device */
79 #define MNTOPT_RTDEV "rtdev" /* realtime I/O device */
80 #define MNTOPT_BIOSIZE "biosize" /* log2 of preferred buffered io size */
81 #define MNTOPT_WSYNC "wsync" /* safe-mode nfs compatible mount */
82 #define MNTOPT_NOALIGN "noalign" /* turn off stripe alignment */
83 #define MNTOPT_SWALLOC "swalloc" /* turn on stripe width allocation */
84 #define MNTOPT_SUNIT "sunit" /* data volume stripe unit */
85 #define MNTOPT_SWIDTH "swidth" /* data volume stripe width */
86 #define MNTOPT_NOUUID "nouuid" /* ignore filesystem UUID */
87 #define MNTOPT_MTPT "mtpt" /* filesystem mount point */
88 #define MNTOPT_GRPID "grpid" /* group-ID from parent directory */
89 #define MNTOPT_NOGRPID "nogrpid" /* group-ID from current process */
90 #define MNTOPT_BSDGROUPS "bsdgroups" /* group-ID from parent directory */
91 #define MNTOPT_SYSVGROUPS "sysvgroups" /* group-ID from current process */
92 #define MNTOPT_ALLOCSIZE "allocsize" /* preferred allocation size */
93 #define MNTOPT_NORECOVERY "norecovery" /* don't run XFS recovery */
94 #define MNTOPT_BARRIER "barrier" /* use writer barriers for log write and
95 * unwritten extent conversion */
96 #define MNTOPT_NOBARRIER "nobarrier" /* .. disable */
97 #define MNTOPT_OSYNCISOSYNC "osyncisosync" /* o_sync is REALLY o_sync */
98 #define MNTOPT_64BITINODE "inode64" /* inodes can be allocated anywhere */
99 #define MNTOPT_IKEEP "ikeep" /* do not free empty inode clusters */
100 #define MNTOPT_NOIKEEP "noikeep" /* free empty inode clusters */
101 #define MNTOPT_LARGEIO "largeio" /* report large I/O sizes in stat() */
102 #define MNTOPT_NOLARGEIO "nolargeio" /* do not report large I/O sizes
104 #define MNTOPT_ATTR2 "attr2" /* do use attr2 attribute format */
105 #define MNTOPT_NOATTR2 "noattr2" /* do not use attr2 attribute format */
106 #define MNTOPT_FILESTREAM "filestreams" /* use filestreams allocator */
107 #define MNTOPT_QUOTA "quota" /* disk quotas (user) */
108 #define MNTOPT_NOQUOTA "noquota" /* no quotas */
109 #define MNTOPT_USRQUOTA "usrquota" /* user quota enabled */
110 #define MNTOPT_GRPQUOTA "grpquota" /* group quota enabled */
111 #define MNTOPT_PRJQUOTA "prjquota" /* project quota enabled */
112 #define MNTOPT_UQUOTA "uquota" /* user quota (IRIX variant) */
113 #define MNTOPT_GQUOTA "gquota" /* group quota (IRIX variant) */
114 #define MNTOPT_PQUOTA "pquota" /* project quota (IRIX variant) */
115 #define MNTOPT_UQUOTANOENF "uqnoenforce"/* user quota limit enforcement */
116 #define MNTOPT_GQUOTANOENF "gqnoenforce"/* group quota limit enforcement */
117 #define MNTOPT_PQUOTANOENF "pqnoenforce"/* project quota limit enforcement */
118 #define MNTOPT_QUOTANOENF "qnoenforce" /* same as uqnoenforce */
119 #define MNTOPT_DMAPI "dmapi" /* DMI enabled (DMAPI / XDSM) */
120 #define MNTOPT_XDSM "xdsm" /* DMI enabled (DMAPI / XDSM) */
121 #define MNTOPT_DMI "dmi" /* DMI enabled (DMAPI / XDSM) */
124 * Table driven mount option parser.
126 * Currently only used for remount, but it will be used for mount
127 * in the future, too.
130 Opt_barrier, Opt_nobarrier, Opt_err
133 static const match_table_t tokens = {
134 {Opt_barrier, "barrier"},
135 {Opt_nobarrier, "nobarrier"},
141 suffix_strtoul(char *s, char **endp, unsigned int base)
143 int last, shift_left_factor = 0;
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 return simple_strtoul((const char *)s, endp, base) << shift_left_factor;
164 * This function fills in xfs_mount_t fields based on mount args.
165 * Note: the superblock has _not_ yet been read in.
167 * Note that this function leaks the various device name allocations on
168 * failure. The caller takes care of them.
172 struct xfs_mount *mp,
176 struct super_block *sb = mp->m_super;
177 char *this_char, *value, *eov;
181 int dmapi_implies_ikeep = 1;
182 __uint8_t iosizelog = 0;
185 * Copy binary VFS mount flags we are interested in.
187 if (sb->s_flags & MS_RDONLY)
188 mp->m_flags |= XFS_MOUNT_RDONLY;
189 if (sb->s_flags & MS_DIRSYNC)
190 mp->m_flags |= XFS_MOUNT_DIRSYNC;
191 if (sb->s_flags & MS_SYNCHRONOUS)
192 mp->m_flags |= XFS_MOUNT_WSYNC;
195 * Set some default flags that could be cleared by the mount option
198 mp->m_flags |= XFS_MOUNT_BARRIER;
199 mp->m_flags |= XFS_MOUNT_COMPAT_IOSIZE;
200 mp->m_flags |= XFS_MOUNT_SMALL_INUMS;
203 * These can be overridden by the mount option parsing.
211 while ((this_char = strsep(&options, ",")) != NULL) {
214 if ((value = strchr(this_char, '=')) != NULL)
217 if (!strcmp(this_char, MNTOPT_LOGBUFS)) {
218 if (!value || !*value) {
220 "XFS: %s option requires an argument",
224 mp->m_logbufs = simple_strtoul(value, &eov, 10);
225 } else if (!strcmp(this_char, MNTOPT_LOGBSIZE)) {
226 if (!value || !*value) {
228 "XFS: %s option requires an argument",
232 mp->m_logbsize = suffix_strtoul(value, &eov, 10);
233 } else if (!strcmp(this_char, MNTOPT_LOGDEV)) {
234 if (!value || !*value) {
236 "XFS: %s option requires an argument",
240 mp->m_logname = kstrndup(value, MAXNAMELEN, GFP_KERNEL);
243 } else if (!strcmp(this_char, MNTOPT_MTPT)) {
244 if (!value || !*value) {
246 "XFS: %s option requires an argument",
250 *mtpt = kstrndup(value, MAXNAMELEN, GFP_KERNEL);
253 } else if (!strcmp(this_char, MNTOPT_RTDEV)) {
254 if (!value || !*value) {
256 "XFS: %s option requires an argument",
260 mp->m_rtname = kstrndup(value, MAXNAMELEN, GFP_KERNEL);
263 } else if (!strcmp(this_char, MNTOPT_BIOSIZE)) {
264 if (!value || !*value) {
266 "XFS: %s option requires an argument",
270 iosize = simple_strtoul(value, &eov, 10);
271 iosizelog = ffs(iosize) - 1;
272 } else if (!strcmp(this_char, MNTOPT_ALLOCSIZE)) {
273 if (!value || !*value) {
275 "XFS: %s option requires an argument",
279 iosize = suffix_strtoul(value, &eov, 10);
280 iosizelog = ffs(iosize) - 1;
281 } else if (!strcmp(this_char, MNTOPT_GRPID) ||
282 !strcmp(this_char, MNTOPT_BSDGROUPS)) {
283 mp->m_flags |= XFS_MOUNT_GRPID;
284 } else if (!strcmp(this_char, MNTOPT_NOGRPID) ||
285 !strcmp(this_char, MNTOPT_SYSVGROUPS)) {
286 mp->m_flags &= ~XFS_MOUNT_GRPID;
287 } else if (!strcmp(this_char, MNTOPT_WSYNC)) {
288 mp->m_flags |= XFS_MOUNT_WSYNC;
289 } else if (!strcmp(this_char, MNTOPT_OSYNCISOSYNC)) {
290 mp->m_flags |= XFS_MOUNT_OSYNCISOSYNC;
291 } else if (!strcmp(this_char, MNTOPT_NORECOVERY)) {
292 mp->m_flags |= XFS_MOUNT_NORECOVERY;
293 } else if (!strcmp(this_char, MNTOPT_NOALIGN)) {
294 mp->m_flags |= XFS_MOUNT_NOALIGN;
295 } else if (!strcmp(this_char, MNTOPT_SWALLOC)) {
296 mp->m_flags |= XFS_MOUNT_SWALLOC;
297 } else if (!strcmp(this_char, MNTOPT_SUNIT)) {
298 if (!value || !*value) {
300 "XFS: %s option requires an argument",
304 dsunit = simple_strtoul(value, &eov, 10);
305 } else if (!strcmp(this_char, MNTOPT_SWIDTH)) {
306 if (!value || !*value) {
308 "XFS: %s option requires an argument",
312 dswidth = simple_strtoul(value, &eov, 10);
313 } else if (!strcmp(this_char, MNTOPT_64BITINODE)) {
314 mp->m_flags &= ~XFS_MOUNT_SMALL_INUMS;
317 "XFS: %s option not allowed on this system",
321 } else if (!strcmp(this_char, MNTOPT_NOUUID)) {
322 mp->m_flags |= XFS_MOUNT_NOUUID;
323 } else if (!strcmp(this_char, MNTOPT_BARRIER)) {
324 mp->m_flags |= XFS_MOUNT_BARRIER;
325 } else if (!strcmp(this_char, MNTOPT_NOBARRIER)) {
326 mp->m_flags &= ~XFS_MOUNT_BARRIER;
327 } else if (!strcmp(this_char, MNTOPT_IKEEP)) {
328 mp->m_flags |= XFS_MOUNT_IKEEP;
329 } else if (!strcmp(this_char, MNTOPT_NOIKEEP)) {
330 dmapi_implies_ikeep = 0;
331 mp->m_flags &= ~XFS_MOUNT_IKEEP;
332 } else if (!strcmp(this_char, MNTOPT_LARGEIO)) {
333 mp->m_flags &= ~XFS_MOUNT_COMPAT_IOSIZE;
334 } else if (!strcmp(this_char, MNTOPT_NOLARGEIO)) {
335 mp->m_flags |= XFS_MOUNT_COMPAT_IOSIZE;
336 } else if (!strcmp(this_char, MNTOPT_ATTR2)) {
337 mp->m_flags |= XFS_MOUNT_ATTR2;
338 } else if (!strcmp(this_char, MNTOPT_NOATTR2)) {
339 mp->m_flags &= ~XFS_MOUNT_ATTR2;
340 mp->m_flags |= XFS_MOUNT_NOATTR2;
341 } else if (!strcmp(this_char, MNTOPT_FILESTREAM)) {
342 mp->m_flags |= XFS_MOUNT_FILESTREAMS;
343 } else if (!strcmp(this_char, MNTOPT_NOQUOTA)) {
344 mp->m_qflags &= ~(XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE |
345 XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE |
346 XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE |
347 XFS_UQUOTA_ENFD | XFS_OQUOTA_ENFD);
348 } else if (!strcmp(this_char, MNTOPT_QUOTA) ||
349 !strcmp(this_char, MNTOPT_UQUOTA) ||
350 !strcmp(this_char, MNTOPT_USRQUOTA)) {
351 mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE |
353 } else if (!strcmp(this_char, MNTOPT_QUOTANOENF) ||
354 !strcmp(this_char, MNTOPT_UQUOTANOENF)) {
355 mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE);
356 mp->m_qflags &= ~XFS_UQUOTA_ENFD;
357 } else if (!strcmp(this_char, MNTOPT_PQUOTA) ||
358 !strcmp(this_char, MNTOPT_PRJQUOTA)) {
359 mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE |
361 } else if (!strcmp(this_char, MNTOPT_PQUOTANOENF)) {
362 mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE);
363 mp->m_qflags &= ~XFS_OQUOTA_ENFD;
364 } else if (!strcmp(this_char, MNTOPT_GQUOTA) ||
365 !strcmp(this_char, MNTOPT_GRPQUOTA)) {
366 mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE |
368 } else if (!strcmp(this_char, MNTOPT_GQUOTANOENF)) {
369 mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE);
370 mp->m_qflags &= ~XFS_OQUOTA_ENFD;
371 } else if (!strcmp(this_char, MNTOPT_DMAPI)) {
372 mp->m_flags |= XFS_MOUNT_DMAPI;
373 } else if (!strcmp(this_char, MNTOPT_XDSM)) {
374 mp->m_flags |= XFS_MOUNT_DMAPI;
375 } else if (!strcmp(this_char, MNTOPT_DMI)) {
376 mp->m_flags |= XFS_MOUNT_DMAPI;
377 } else if (!strcmp(this_char, "ihashsize")) {
379 "XFS: ihashsize no longer used, option is deprecated.");
380 } else if (!strcmp(this_char, "osyncisdsync")) {
381 /* no-op, this is now the default */
383 "XFS: osyncisdsync is now the default, option is deprecated.");
384 } else if (!strcmp(this_char, "irixsgid")) {
386 "XFS: irixsgid is now a sysctl(2) variable, option is deprecated.");
389 "XFS: unknown mount option [%s].", this_char);
395 * no recovery flag requires a read-only mount
397 if ((mp->m_flags & XFS_MOUNT_NORECOVERY) &&
398 !(mp->m_flags & XFS_MOUNT_RDONLY)) {
399 cmn_err(CE_WARN, "XFS: no-recovery mounts must be read-only.");
403 if ((mp->m_flags & XFS_MOUNT_NOALIGN) && (dsunit || dswidth)) {
405 "XFS: sunit and swidth options incompatible with the noalign option");
409 #ifndef CONFIG_XFS_QUOTA
410 if (XFS_IS_QUOTA_RUNNING(mp)) {
412 "XFS: quota support not available in this kernel.");
417 if ((mp->m_qflags & (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE)) &&
418 (mp->m_qflags & (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE))) {
420 "XFS: cannot mount with both project and group quota");
424 if ((mp->m_flags & XFS_MOUNT_DMAPI) && (!*mtpt || *mtpt[0] == '\0')) {
425 printk("XFS: %s option needs the mount point option as well\n",
430 if ((dsunit && !dswidth) || (!dsunit && dswidth)) {
432 "XFS: sunit and swidth must be specified together");
436 if (dsunit && (dswidth % dsunit != 0)) {
438 "XFS: stripe width (%d) must be a multiple of the stripe unit (%d)",
444 * Applications using DMI filesystems often expect the
445 * inode generation number to be monotonically increasing.
446 * If we delete inode chunks we break this assumption, so
447 * keep unused inode chunks on disk for DMI filesystems
448 * until we come up with a better solution.
449 * Note that if "ikeep" or "noikeep" mount options are
450 * supplied, then they are honored.
452 if ((mp->m_flags & XFS_MOUNT_DMAPI) && dmapi_implies_ikeep)
453 mp->m_flags |= XFS_MOUNT_IKEEP;
456 if (!(mp->m_flags & XFS_MOUNT_NOALIGN)) {
458 * At this point the superblock has not been read
459 * in, therefore we do not know the block size.
460 * Before the mount call ends we will convert
464 mp->m_dalign = dsunit;
465 mp->m_flags |= XFS_MOUNT_RETERR;
469 mp->m_swidth = dswidth;
472 if (mp->m_logbufs != -1 &&
473 mp->m_logbufs != 0 &&
474 (mp->m_logbufs < XLOG_MIN_ICLOGS ||
475 mp->m_logbufs > XLOG_MAX_ICLOGS)) {
477 "XFS: invalid logbufs value: %d [not %d-%d]",
478 mp->m_logbufs, XLOG_MIN_ICLOGS, XLOG_MAX_ICLOGS);
479 return XFS_ERROR(EINVAL);
481 if (mp->m_logbsize != -1 &&
482 mp->m_logbsize != 0 &&
483 (mp->m_logbsize < XLOG_MIN_RECORD_BSIZE ||
484 mp->m_logbsize > XLOG_MAX_RECORD_BSIZE ||
485 !is_power_of_2(mp->m_logbsize))) {
487 "XFS: invalid logbufsize: %d [not 16k,32k,64k,128k or 256k]",
489 return XFS_ERROR(EINVAL);
492 mp->m_fsname = kstrndup(sb->s_id, MAXNAMELEN, GFP_KERNEL);
495 mp->m_fsname_len = strlen(mp->m_fsname) + 1;
498 if (iosizelog > XFS_MAX_IO_LOG ||
499 iosizelog < XFS_MIN_IO_LOG) {
501 "XFS: invalid log iosize: %d [not %d-%d]",
502 iosizelog, XFS_MIN_IO_LOG,
504 return XFS_ERROR(EINVAL);
507 mp->m_flags |= XFS_MOUNT_DFLT_IOSIZE;
508 mp->m_readio_log = iosizelog;
509 mp->m_writeio_log = iosizelog;
515 struct proc_xfs_info {
522 struct xfs_mount *mp,
525 static struct proc_xfs_info xfs_info_set[] = {
526 /* the few simple ones we can get from the mount struct */
527 { XFS_MOUNT_IKEEP, "," MNTOPT_IKEEP },
528 { XFS_MOUNT_WSYNC, "," MNTOPT_WSYNC },
529 { XFS_MOUNT_NOALIGN, "," MNTOPT_NOALIGN },
530 { XFS_MOUNT_SWALLOC, "," MNTOPT_SWALLOC },
531 { XFS_MOUNT_NOUUID, "," MNTOPT_NOUUID },
532 { XFS_MOUNT_NORECOVERY, "," MNTOPT_NORECOVERY },
533 { XFS_MOUNT_OSYNCISOSYNC, "," MNTOPT_OSYNCISOSYNC },
534 { XFS_MOUNT_ATTR2, "," MNTOPT_ATTR2 },
535 { XFS_MOUNT_FILESTREAMS, "," MNTOPT_FILESTREAM },
536 { XFS_MOUNT_DMAPI, "," MNTOPT_DMAPI },
537 { XFS_MOUNT_GRPID, "," MNTOPT_GRPID },
540 static struct proc_xfs_info xfs_info_unset[] = {
541 /* the few simple ones we can get from the mount struct */
542 { XFS_MOUNT_COMPAT_IOSIZE, "," MNTOPT_LARGEIO },
543 { XFS_MOUNT_BARRIER, "," MNTOPT_NOBARRIER },
544 { XFS_MOUNT_SMALL_INUMS, "," MNTOPT_64BITINODE },
547 struct proc_xfs_info *xfs_infop;
549 for (xfs_infop = xfs_info_set; xfs_infop->flag; xfs_infop++) {
550 if (mp->m_flags & xfs_infop->flag)
551 seq_puts(m, xfs_infop->str);
553 for (xfs_infop = xfs_info_unset; xfs_infop->flag; xfs_infop++) {
554 if (!(mp->m_flags & xfs_infop->flag))
555 seq_puts(m, xfs_infop->str);
558 if (mp->m_flags & XFS_MOUNT_DFLT_IOSIZE)
559 seq_printf(m, "," MNTOPT_ALLOCSIZE "=%dk",
560 (int)(1 << mp->m_writeio_log) >> 10);
562 if (mp->m_logbufs > 0)
563 seq_printf(m, "," MNTOPT_LOGBUFS "=%d", mp->m_logbufs);
564 if (mp->m_logbsize > 0)
565 seq_printf(m, "," MNTOPT_LOGBSIZE "=%dk", mp->m_logbsize >> 10);
568 seq_printf(m, "," MNTOPT_LOGDEV "=%s", mp->m_logname);
570 seq_printf(m, "," MNTOPT_RTDEV "=%s", mp->m_rtname);
572 if (mp->m_dalign > 0)
573 seq_printf(m, "," MNTOPT_SUNIT "=%d",
574 (int)XFS_FSB_TO_BB(mp, mp->m_dalign));
575 if (mp->m_swidth > 0)
576 seq_printf(m, "," MNTOPT_SWIDTH "=%d",
577 (int)XFS_FSB_TO_BB(mp, mp->m_swidth));
579 if (mp->m_qflags & (XFS_UQUOTA_ACCT|XFS_UQUOTA_ENFD))
580 seq_puts(m, "," MNTOPT_USRQUOTA);
581 else if (mp->m_qflags & XFS_UQUOTA_ACCT)
582 seq_puts(m, "," MNTOPT_UQUOTANOENF);
584 /* Either project or group quotas can be active, not both */
586 if (mp->m_qflags & XFS_PQUOTA_ACCT) {
587 if (mp->m_qflags & XFS_OQUOTA_ENFD)
588 seq_puts(m, "," MNTOPT_PRJQUOTA);
590 seq_puts(m, "," MNTOPT_PQUOTANOENF);
591 } else if (mp->m_qflags & XFS_GQUOTA_ACCT) {
592 if (mp->m_qflags & XFS_OQUOTA_ENFD)
593 seq_puts(m, "," MNTOPT_GRPQUOTA);
595 seq_puts(m, "," MNTOPT_GQUOTANOENF);
598 if (!(mp->m_qflags & XFS_ALL_QUOTA_ACCT))
599 seq_puts(m, "," MNTOPT_NOQUOTA);
605 unsigned int blockshift)
607 unsigned int pagefactor = 1;
608 unsigned int bitshift = BITS_PER_LONG - 1;
610 /* Figure out maximum filesize, on Linux this can depend on
611 * the filesystem blocksize (on 32 bit platforms).
612 * __block_prepare_write does this in an [unsigned] long...
613 * page->index << (PAGE_CACHE_SHIFT - bbits)
614 * So, for page sized blocks (4K on 32 bit platforms),
615 * this wraps at around 8Tb (hence MAX_LFS_FILESIZE which is
616 * (((u64)PAGE_CACHE_SIZE << (BITS_PER_LONG-1))-1)
617 * but for smaller blocksizes it is less (bbits = log2 bsize).
618 * Note1: get_block_t takes a long (implicit cast from above)
619 * Note2: The Large Block Device (LBD and HAVE_SECTOR_T) patch
620 * can optionally convert the [unsigned] long from above into
621 * an [unsigned] long long.
624 #if BITS_PER_LONG == 32
625 # if defined(CONFIG_LBDAF)
626 ASSERT(sizeof(sector_t) == 8);
627 pagefactor = PAGE_CACHE_SIZE;
628 bitshift = BITS_PER_LONG;
630 pagefactor = PAGE_CACHE_SIZE >> (PAGE_CACHE_SHIFT - blockshift);
634 return (((__uint64_t)pagefactor) << bitshift) - 1;
641 struct block_device **bdevp)
645 *bdevp = open_bdev_exclusive(name, FMODE_READ|FMODE_WRITE, mp);
646 if (IS_ERR(*bdevp)) {
647 error = PTR_ERR(*bdevp);
648 printk("XFS: Invalid device [%s], error=%d\n", name, error);
656 struct block_device *bdev)
659 close_bdev_exclusive(bdev, FMODE_READ|FMODE_WRITE);
663 * Try to write out the superblock using barriers.
669 xfs_buf_t *sbp = xfs_getsb(mp, 0);
674 XFS_BUF_UNDELAYWRITE(sbp);
676 XFS_BUF_UNASYNC(sbp);
677 XFS_BUF_ORDERED(sbp);
680 error = xfs_iowait(sbp);
683 * Clear all the flags we set and possible error state in the
684 * buffer. We only did the write to try out whether barriers
685 * worked and shouldn't leave any traces in the superblock
689 XFS_BUF_ERROR(sbp, 0);
690 XFS_BUF_UNORDERED(sbp);
697 xfs_mountfs_check_barriers(xfs_mount_t *mp)
701 if (mp->m_logdev_targp != mp->m_ddev_targp) {
702 xfs_fs_cmn_err(CE_NOTE, mp,
703 "Disabling barriers, not supported with external log device");
704 mp->m_flags &= ~XFS_MOUNT_BARRIER;
708 if (xfs_readonly_buftarg(mp->m_ddev_targp)) {
709 xfs_fs_cmn_err(CE_NOTE, mp,
710 "Disabling barriers, underlying device is readonly");
711 mp->m_flags &= ~XFS_MOUNT_BARRIER;
715 error = xfs_barrier_test(mp);
717 xfs_fs_cmn_err(CE_NOTE, mp,
718 "Disabling barriers, trial barrier write failed");
719 mp->m_flags &= ~XFS_MOUNT_BARRIER;
725 xfs_blkdev_issue_flush(
726 xfs_buftarg_t *buftarg)
728 blkdev_issue_flush(buftarg->bt_bdev, GFP_KERNEL, NULL,
734 struct xfs_mount *mp)
736 if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp) {
737 struct block_device *logdev = mp->m_logdev_targp->bt_bdev;
738 xfs_free_buftarg(mp, mp->m_logdev_targp);
739 xfs_blkdev_put(logdev);
741 if (mp->m_rtdev_targp) {
742 struct block_device *rtdev = mp->m_rtdev_targp->bt_bdev;
743 xfs_free_buftarg(mp, mp->m_rtdev_targp);
744 xfs_blkdev_put(rtdev);
746 xfs_free_buftarg(mp, mp->m_ddev_targp);
750 * The file system configurations are:
751 * (1) device (partition) with data and internal log
752 * (2) logical volume with data and log subvolumes.
753 * (3) logical volume with data, log, and realtime subvolumes.
755 * We only have to handle opening the log and realtime volumes here if
756 * they are present. The data subvolume has already been opened by
757 * get_sb_bdev() and is stored in sb->s_bdev.
761 struct xfs_mount *mp)
763 struct block_device *ddev = mp->m_super->s_bdev;
764 struct block_device *logdev = NULL, *rtdev = NULL;
768 * Open real time and log devices - order is important.
771 error = xfs_blkdev_get(mp, mp->m_logname, &logdev);
777 error = xfs_blkdev_get(mp, mp->m_rtname, &rtdev);
779 goto out_close_logdev;
781 if (rtdev == ddev || rtdev == logdev) {
783 "XFS: Cannot mount filesystem with identical rtdev and ddev/logdev.");
785 goto out_close_rtdev;
790 * Setup xfs_mount buffer target pointers
793 mp->m_ddev_targp = xfs_alloc_buftarg(ddev, 0);
794 if (!mp->m_ddev_targp)
795 goto out_close_rtdev;
798 mp->m_rtdev_targp = xfs_alloc_buftarg(rtdev, 1);
799 if (!mp->m_rtdev_targp)
800 goto out_free_ddev_targ;
803 if (logdev && logdev != ddev) {
804 mp->m_logdev_targp = xfs_alloc_buftarg(logdev, 1);
805 if (!mp->m_logdev_targp)
806 goto out_free_rtdev_targ;
808 mp->m_logdev_targp = mp->m_ddev_targp;
814 if (mp->m_rtdev_targp)
815 xfs_free_buftarg(mp, mp->m_rtdev_targp);
817 xfs_free_buftarg(mp, mp->m_ddev_targp);
820 xfs_blkdev_put(rtdev);
822 if (logdev && logdev != ddev)
823 xfs_blkdev_put(logdev);
829 * Setup xfs_mount buffer target pointers based on superblock
833 struct xfs_mount *mp)
837 error = xfs_setsize_buftarg(mp->m_ddev_targp, mp->m_sb.sb_blocksize,
838 mp->m_sb.sb_sectsize);
842 if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp) {
843 unsigned int log_sector_size = BBSIZE;
845 if (xfs_sb_version_hassector(&mp->m_sb))
846 log_sector_size = mp->m_sb.sb_logsectsize;
847 error = xfs_setsize_buftarg(mp->m_logdev_targp,
848 mp->m_sb.sb_blocksize,
853 if (mp->m_rtdev_targp) {
854 error = xfs_setsize_buftarg(mp->m_rtdev_targp,
855 mp->m_sb.sb_blocksize,
856 mp->m_sb.sb_sectsize);
865 * XFS AIL push thread support
869 struct xfs_ail *ailp,
870 xfs_lsn_t threshold_lsn)
872 ailp->xa_target = threshold_lsn;
873 wake_up_process(ailp->xa_task);
880 struct xfs_ail *ailp = data;
881 xfs_lsn_t last_pushed_lsn = 0;
882 long tout = 0; /* milliseconds */
884 while (!kthread_should_stop()) {
885 schedule_timeout_interruptible(tout ?
886 msecs_to_jiffies(tout) : MAX_SCHEDULE_TIMEOUT);
891 ASSERT(ailp->xa_mount->m_log);
892 if (XFS_FORCED_SHUTDOWN(ailp->xa_mount))
895 tout = xfsaild_push(ailp, &last_pushed_lsn);
903 struct xfs_ail *ailp)
906 ailp->xa_task = kthread_run(xfsaild, ailp, "xfsaild");
907 if (IS_ERR(ailp->xa_task))
908 return -PTR_ERR(ailp->xa_task);
914 struct xfs_ail *ailp)
916 kthread_stop(ailp->xa_task);
920 /* Catch misguided souls that try to use this interface on XFS */
921 STATIC struct inode *
923 struct super_block *sb)
930 * Now that the generic code is guaranteed not to be accessing
931 * the linux inode, we can reclaim the inode.
934 xfs_fs_destroy_inode(
937 struct xfs_inode *ip = XFS_I(inode);
939 xfs_itrace_entry(ip);
941 XFS_STATS_INC(vn_reclaim);
943 /* bad inode, get out here ASAP */
944 if (is_bad_inode(inode))
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.
965 xfs_inode_set_reclaim_tag(ip);
969 * Slab object creation initialisation for the XFS inode.
970 * This covers only the idempotent fields in the XFS inode;
971 * all other fields need to be initialised on allocation
972 * from the slab. This avoids the need to repeatedly intialise
973 * fields in the xfs inode that left in the initialise state
974 * when freeing the inode.
977 xfs_fs_inode_init_once(
980 struct xfs_inode *ip = inode;
982 memset(ip, 0, sizeof(struct xfs_inode));
985 inode_init_once(VFS_I(ip));
988 atomic_set(&ip->i_iocount, 0);
989 atomic_set(&ip->i_pincount, 0);
990 spin_lock_init(&ip->i_flags_lock);
991 init_waitqueue_head(&ip->i_ipin_wait);
993 * Because we want to use a counting completion, complete
994 * the flush completion once to allow a single access to
995 * the flush completion without blocking.
997 init_completion(&ip->i_flush);
998 complete(&ip->i_flush);
1000 mrlock_init(&ip->i_lock, MRLOCK_ALLOW_EQUAL_PRI|MRLOCK_BARRIER,
1001 "xfsino", ip->i_ino);
1005 * Dirty the XFS inode when mark_inode_dirty_sync() is called so that
1006 * we catch unlogged VFS level updates to the inode. Care must be taken
1007 * here - the transaction code calls mark_inode_dirty_sync() to mark the
1008 * VFS inode dirty in a transaction and clears the i_update_core field;
1009 * it must clear the field after calling mark_inode_dirty_sync() to
1010 * correctly indicate that the dirty state has been propagated into the
1013 * We need the barrier() to maintain correct ordering between unlogged
1014 * updates and the transaction commit code that clears the i_update_core
1015 * field. This requires all updates to be completed before marking the
1020 struct inode *inode)
1023 XFS_I(inode)->i_update_core = 1;
1028 struct xfs_inode *ip)
1030 struct xfs_mount *mp = ip->i_mount;
1031 struct xfs_trans *tp;
1034 xfs_iunlock(ip, XFS_ILOCK_SHARED);
1035 tp = xfs_trans_alloc(mp, XFS_TRANS_FSYNC_TS);
1036 error = xfs_trans_reserve(tp, 0, XFS_FSYNC_TS_LOG_RES(mp), 0, 0, 0);
1039 xfs_trans_cancel(tp, 0);
1040 /* we need to return with the lock hold shared */
1041 xfs_ilock(ip, XFS_ILOCK_SHARED);
1045 xfs_ilock(ip, XFS_ILOCK_EXCL);
1048 * Note - it's possible that we might have pushed ourselves out of the
1049 * way during trans_reserve which would flush the inode. But there's
1050 * no guarantee that the inode buffer has actually gone out yet (it's
1051 * delwri). Plus the buffer could be pinned anyway if it's part of
1052 * an inode in another recent transaction. So we play it safe and
1053 * fire off the transaction anyway.
1055 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
1056 xfs_trans_ihold(tp, ip);
1057 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1058 xfs_trans_set_sync(tp);
1059 error = xfs_trans_commit(tp, 0);
1060 xfs_ilock_demote(ip, XFS_ILOCK_EXCL);
1067 struct inode *inode,
1068 struct writeback_control *wbc)
1070 struct xfs_inode *ip = XFS_I(inode);
1071 struct xfs_mount *mp = ip->i_mount;
1074 xfs_itrace_entry(ip);
1076 if (XFS_FORCED_SHUTDOWN(mp))
1077 return XFS_ERROR(EIO);
1079 if (wbc->sync_mode == WB_SYNC_ALL) {
1081 * Make sure the inode has hit stable storage. By using the
1082 * log and the fsync transactions we reduce the IOs we have
1083 * to do here from two (log and inode) to just the log.
1085 * Note: We still need to do a delwri write of the inode after
1086 * this to flush it to the backing buffer so that bulkstat
1087 * works properly if this is the first time the inode has been
1088 * written. Because we hold the ilock atomically over the
1089 * transaction commit and the inode flush we are guaranteed
1090 * that the inode is not pinned when it returns. If the flush
1091 * lock is already held, then the inode has already been
1092 * flushed once and we don't need to flush it again. Hence
1093 * the code will only flush the inode if it isn't already
1096 xfs_ilock(ip, XFS_ILOCK_SHARED);
1097 if (ip->i_update_core) {
1098 error = xfs_log_inode(ip);
1104 * We make this non-blocking if the inode is contended, return
1105 * EAGAIN to indicate to the caller that they did not succeed.
1106 * This prevents the flush path from blocking on inodes inside
1107 * another operation right now, they get caught later by xfs_sync.
1109 if (!xfs_ilock_nowait(ip, XFS_ILOCK_SHARED))
1113 if (xfs_ipincount(ip) || !xfs_iflock_nowait(ip))
1117 * Now we have the flush lock and the inode is not pinned, we can check
1118 * if the inode is really clean as we know that there are no pending
1119 * transaction completions, it is not waiting on the delayed write
1120 * queue and there is no IO in progress.
1122 if (xfs_inode_clean(ip)) {
1127 error = xfs_iflush(ip, 0);
1130 xfs_iunlock(ip, XFS_ILOCK_SHARED);
1133 * if we failed to write out the inode then mark
1134 * it dirty again so we'll try again later.
1137 xfs_mark_inode_dirty_sync(ip);
1143 struct inode *inode)
1145 xfs_inode_t *ip = XFS_I(inode);
1147 xfs_itrace_entry(ip);
1148 XFS_STATS_INC(vn_rele);
1149 XFS_STATS_INC(vn_remove);
1150 XFS_STATS_DEC(vn_active);
1153 * The iolock is used by the file system to coordinate reads,
1154 * writes, and block truncates. Up to this point the lock
1155 * protected concurrent accesses by users of the inode. But
1156 * from here forward we're doing some final processing of the
1157 * inode because we're done with it, and although we reuse the
1158 * iolock for protection it is really a distinct lock class
1159 * (in the lockdep sense) from before. To keep lockdep happy
1160 * (and basically indicate what we are doing), we explicitly
1161 * re-init the iolock here.
1163 ASSERT(!rwsem_is_locked(&ip->i_iolock.mr_lock));
1164 mrlock_init(&ip->i_iolock, MRLOCK_BARRIER, "xfsio", ip->i_ino);
1171 struct xfs_mount *mp)
1173 kfree(mp->m_fsname);
1174 kfree(mp->m_rtname);
1175 kfree(mp->m_logname);
1180 struct super_block *sb)
1182 struct xfs_mount *mp = XFS_M(sb);
1186 if (!(sb->s_flags & MS_RDONLY)) {
1188 * XXX(hch): this should be SYNC_WAIT.
1190 * Or more likely not needed at all because the VFS is already
1191 * calling ->sync_fs after shutting down all filestem
1192 * operations and just before calling ->put_super.
1194 xfs_sync_data(mp, 0);
1195 xfs_sync_attr(mp, 0);
1198 XFS_SEND_PREUNMOUNT(mp);
1201 * Blow away any referenced inode in the filestreams cache.
1202 * This can and will cause log traffic as inodes go inactive
1205 xfs_filestream_unmount(mp);
1207 XFS_bflush(mp->m_ddev_targp);
1209 XFS_SEND_UNMOUNT(mp);
1213 xfs_icsb_destroy_counters(mp);
1214 xfs_close_devices(mp);
1216 xfs_free_fsname(mp);
1222 struct super_block *sb,
1225 struct xfs_mount *mp = XFS_M(sb);
1229 * Not much we can do for the first async pass. Writing out the
1230 * superblock would be counter-productive as we are going to redirty
1231 * when writing out other data and metadata (and writing out a single
1232 * block is quite fast anyway).
1234 * Try to asynchronously kick off quota syncing at least.
1237 xfs_qm_sync(mp, SYNC_TRYLOCK);
1241 error = xfs_quiesce_data(mp);
1246 int prev_sync_seq = mp->m_sync_seq;
1249 * The disk must be active because we're syncing.
1250 * We schedule xfssyncd now (now that the disk is
1251 * active) instead of later (when it might not be).
1253 wake_up_process(mp->m_sync_task);
1255 * We have to wait for the sync iteration to complete.
1256 * If we don't, the disk activity caused by the sync
1257 * will come after the sync is completed, and that
1258 * triggers another sync from laptop mode.
1260 wait_event(mp->m_wait_single_sync_task,
1261 mp->m_sync_seq != prev_sync_seq);
1269 struct dentry *dentry,
1270 struct kstatfs *statp)
1272 struct xfs_mount *mp = XFS_M(dentry->d_sb);
1273 xfs_sb_t *sbp = &mp->m_sb;
1274 struct xfs_inode *ip = XFS_I(dentry->d_inode);
1275 __uint64_t fakeinos, id;
1278 statp->f_type = XFS_SB_MAGIC;
1279 statp->f_namelen = MAXNAMELEN - 1;
1281 id = huge_encode_dev(mp->m_ddev_targp->bt_dev);
1282 statp->f_fsid.val[0] = (u32)id;
1283 statp->f_fsid.val[1] = (u32)(id >> 32);
1285 xfs_icsb_sync_counters(mp, XFS_ICSB_LAZY_COUNT);
1287 spin_lock(&mp->m_sb_lock);
1288 statp->f_bsize = sbp->sb_blocksize;
1289 lsize = sbp->sb_logstart ? sbp->sb_logblocks : 0;
1290 statp->f_blocks = sbp->sb_dblocks - lsize;
1291 statp->f_bfree = statp->f_bavail =
1292 sbp->sb_fdblocks - XFS_ALLOC_SET_ASIDE(mp);
1293 fakeinos = statp->f_bfree << sbp->sb_inopblog;
1295 MIN(sbp->sb_icount + fakeinos, (__uint64_t)XFS_MAXINUMBER);
1296 if (mp->m_maxicount)
1297 statp->f_files = min_t(typeof(statp->f_files),
1300 statp->f_ffree = statp->f_files - (sbp->sb_icount - sbp->sb_ifree);
1301 spin_unlock(&mp->m_sb_lock);
1303 if ((ip->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) ||
1304 ((mp->m_qflags & (XFS_PQUOTA_ACCT|XFS_OQUOTA_ENFD))) ==
1305 (XFS_PQUOTA_ACCT|XFS_OQUOTA_ENFD))
1306 xfs_qm_statvfs(ip, statp);
1311 xfs_save_resvblks(struct xfs_mount *mp)
1313 __uint64_t resblks = 0;
1315 mp->m_resblks_save = mp->m_resblks;
1316 xfs_reserve_blocks(mp, &resblks, NULL);
1320 xfs_restore_resvblks(struct xfs_mount *mp)
1324 if (mp->m_resblks_save) {
1325 resblks = mp->m_resblks_save;
1326 mp->m_resblks_save = 0;
1328 resblks = xfs_default_resblks(mp);
1330 xfs_reserve_blocks(mp, &resblks, NULL);
1335 struct super_block *sb,
1339 struct xfs_mount *mp = XFS_M(sb);
1340 substring_t args[MAX_OPT_ARGS];
1344 while ((p = strsep(&options, ",")) != NULL) {
1350 token = match_token(p, tokens, args);
1353 mp->m_flags |= XFS_MOUNT_BARRIER;
1356 * Test if barriers are actually working if we can,
1357 * else delay this check until the filesystem is
1360 if (!(mp->m_flags & XFS_MOUNT_RDONLY))
1361 xfs_mountfs_check_barriers(mp);
1364 mp->m_flags &= ~XFS_MOUNT_BARRIER;
1368 * Logically we would return an error here to prevent
1369 * users from believing they might have changed
1370 * mount options using remount which can't be changed.
1372 * But unfortunately mount(8) adds all options from
1373 * mtab and fstab to the mount arguments in some cases
1374 * so we can't blindly reject options, but have to
1375 * check for each specified option if it actually
1376 * differs from the currently set option and only
1377 * reject it if that's the case.
1379 * Until that is implemented we return success for
1380 * every remount request, and silently ignore all
1381 * options that we can't actually change.
1385 "XFS: mount option \"%s\" not supported for remount\n", p);
1394 if ((mp->m_flags & XFS_MOUNT_RDONLY) && !(*flags & MS_RDONLY)) {
1395 mp->m_flags &= ~XFS_MOUNT_RDONLY;
1396 if (mp->m_flags & XFS_MOUNT_BARRIER)
1397 xfs_mountfs_check_barriers(mp);
1400 * If this is the first remount to writeable state we
1401 * might have some superblock changes to update.
1403 if (mp->m_update_flags) {
1404 error = xfs_mount_log_sb(mp, mp->m_update_flags);
1407 "XFS: failed to write sb changes");
1410 mp->m_update_flags = 0;
1414 * Fill out the reserve pool if it is empty. Use the stashed
1415 * value if it is non-zero, otherwise go with the default.
1417 xfs_restore_resvblks(mp);
1421 if (!(mp->m_flags & XFS_MOUNT_RDONLY) && (*flags & MS_RDONLY)) {
1423 * After we have synced the data but before we sync the
1424 * metadata, we need to free up the reserve block pool so that
1425 * the used block count in the superblock on disk is correct at
1426 * the end of the remount. Stash the current reserve pool size
1427 * so that if we get remounted rw, we can return it to the same
1431 xfs_quiesce_data(mp);
1432 xfs_save_resvblks(mp);
1433 xfs_quiesce_attr(mp);
1434 mp->m_flags |= XFS_MOUNT_RDONLY;
1441 * Second stage of a freeze. The data is already frozen so we only
1442 * need to take care of the metadata. Once that's done write a dummy
1443 * record to dirty the log in case of a crash while frozen.
1447 struct super_block *sb)
1449 struct xfs_mount *mp = XFS_M(sb);
1451 xfs_save_resvblks(mp);
1452 xfs_quiesce_attr(mp);
1453 return -xfs_fs_log_dummy(mp);
1458 struct super_block *sb)
1460 struct xfs_mount *mp = XFS_M(sb);
1462 xfs_restore_resvblks(mp);
1467 xfs_fs_show_options(
1469 struct vfsmount *mnt)
1471 return -xfs_showargs(XFS_M(mnt->mnt_sb), m);
1475 * This function fills in xfs_mount_t fields based on mount args.
1476 * Note: the superblock _has_ now been read in.
1480 struct xfs_mount *mp)
1482 int ronly = (mp->m_flags & XFS_MOUNT_RDONLY);
1484 /* Fail a mount where the logbuf is smaller than the log stripe */
1485 if (xfs_sb_version_haslogv2(&mp->m_sb)) {
1486 if (mp->m_logbsize <= 0 &&
1487 mp->m_sb.sb_logsunit > XLOG_BIG_RECORD_BSIZE) {
1488 mp->m_logbsize = mp->m_sb.sb_logsunit;
1489 } else if (mp->m_logbsize > 0 &&
1490 mp->m_logbsize < mp->m_sb.sb_logsunit) {
1492 "XFS: logbuf size must be greater than or equal to log stripe size");
1493 return XFS_ERROR(EINVAL);
1496 /* Fail a mount if the logbuf is larger than 32K */
1497 if (mp->m_logbsize > XLOG_BIG_RECORD_BSIZE) {
1499 "XFS: logbuf size for version 1 logs must be 16K or 32K");
1500 return XFS_ERROR(EINVAL);
1505 * mkfs'ed attr2 will turn on attr2 mount unless explicitly
1506 * told by noattr2 to turn it off
1508 if (xfs_sb_version_hasattr2(&mp->m_sb) &&
1509 !(mp->m_flags & XFS_MOUNT_NOATTR2))
1510 mp->m_flags |= XFS_MOUNT_ATTR2;
1513 * prohibit r/w mounts of read-only filesystems
1515 if ((mp->m_sb.sb_flags & XFS_SBF_READONLY) && !ronly) {
1517 "XFS: cannot mount a read-only filesystem as read-write");
1518 return XFS_ERROR(EROFS);
1526 struct super_block *sb,
1531 struct xfs_mount *mp = NULL;
1532 int flags = 0, error = ENOMEM;
1535 mp = kzalloc(sizeof(struct xfs_mount), GFP_KERNEL);
1539 spin_lock_init(&mp->m_sb_lock);
1540 mutex_init(&mp->m_growlock);
1541 atomic_set(&mp->m_active_trans, 0);
1542 INIT_LIST_HEAD(&mp->m_sync_list);
1543 spin_lock_init(&mp->m_sync_lock);
1544 init_waitqueue_head(&mp->m_wait_single_sync_task);
1549 error = xfs_parseargs(mp, (char *)data, &mtpt);
1551 goto out_free_fsname;
1553 sb_min_blocksize(sb, BBSIZE);
1554 sb->s_xattr = xfs_xattr_handlers;
1555 sb->s_export_op = &xfs_export_operations;
1556 #ifdef CONFIG_XFS_QUOTA
1557 sb->s_qcop = &xfs_quotactl_operations;
1559 sb->s_op = &xfs_super_operations;
1561 error = xfs_dmops_get(mp);
1563 goto out_free_fsname;
1566 flags |= XFS_MFSI_QUIET;
1568 error = xfs_open_devices(mp);
1572 if (xfs_icsb_init_counters(mp))
1573 mp->m_flags |= XFS_MOUNT_NO_PERCPU_SB;
1575 error = xfs_readsb(mp, flags);
1577 goto out_destroy_counters;
1579 error = xfs_finish_flags(mp);
1583 error = xfs_setup_devices(mp);
1587 if (mp->m_flags & XFS_MOUNT_BARRIER)
1588 xfs_mountfs_check_barriers(mp);
1590 error = xfs_filestream_mount(mp);
1594 error = xfs_mountfs(mp);
1596 goto out_filestream_unmount;
1598 XFS_SEND_MOUNT(mp, DM_RIGHT_NULL, mtpt, mp->m_fsname);
1600 sb->s_magic = XFS_SB_MAGIC;
1601 sb->s_blocksize = mp->m_sb.sb_blocksize;
1602 sb->s_blocksize_bits = ffs(sb->s_blocksize) - 1;
1603 sb->s_maxbytes = xfs_max_file_offset(sb->s_blocksize_bits);
1604 sb->s_time_gran = 1;
1605 set_posix_acl_flag(sb);
1607 root = igrab(VFS_I(mp->m_rootip));
1612 if (is_bad_inode(root)) {
1616 sb->s_root = d_alloc_root(root);
1622 error = xfs_syncd_init(mp);
1629 out_filestream_unmount:
1630 xfs_filestream_unmount(mp);
1633 out_destroy_counters:
1634 xfs_icsb_destroy_counters(mp);
1635 xfs_close_devices(mp);
1639 xfs_free_fsname(mp);
1655 * Blow away any referenced inode in the filestreams cache.
1656 * This can and will cause log traffic as inodes go inactive
1659 xfs_filestream_unmount(mp);
1661 XFS_bflush(mp->m_ddev_targp);
1669 struct file_system_type *fs_type,
1671 const char *dev_name,
1673 struct vfsmount *mnt)
1675 return get_sb_bdev(fs_type, flags, dev_name, data, xfs_fs_fill_super,
1679 static const struct super_operations xfs_super_operations = {
1680 .alloc_inode = xfs_fs_alloc_inode,
1681 .destroy_inode = xfs_fs_destroy_inode,
1682 .dirty_inode = xfs_fs_dirty_inode,
1683 .write_inode = xfs_fs_write_inode,
1684 .clear_inode = xfs_fs_clear_inode,
1685 .put_super = xfs_fs_put_super,
1686 .sync_fs = xfs_fs_sync_fs,
1687 .freeze_fs = xfs_fs_freeze,
1688 .unfreeze_fs = xfs_fs_unfreeze,
1689 .statfs = xfs_fs_statfs,
1690 .remount_fs = xfs_fs_remount,
1691 .show_options = xfs_fs_show_options,
1694 static struct file_system_type xfs_fs_type = {
1695 .owner = THIS_MODULE,
1697 .get_sb = xfs_fs_get_sb,
1698 .kill_sb = kill_block_super,
1699 .fs_flags = FS_REQUIRES_DEV,
1703 xfs_init_zones(void)
1706 xfs_ioend_zone = kmem_zone_init(sizeof(xfs_ioend_t), "xfs_ioend");
1707 if (!xfs_ioend_zone)
1710 xfs_ioend_pool = mempool_create_slab_pool(4 * MAX_BUF_PER_PAGE,
1712 if (!xfs_ioend_pool)
1713 goto out_destroy_ioend_zone;
1715 xfs_log_ticket_zone = kmem_zone_init(sizeof(xlog_ticket_t),
1717 if (!xfs_log_ticket_zone)
1718 goto out_destroy_ioend_pool;
1720 xfs_bmap_free_item_zone = kmem_zone_init(sizeof(xfs_bmap_free_item_t),
1721 "xfs_bmap_free_item");
1722 if (!xfs_bmap_free_item_zone)
1723 goto out_destroy_log_ticket_zone;
1725 xfs_btree_cur_zone = kmem_zone_init(sizeof(xfs_btree_cur_t),
1727 if (!xfs_btree_cur_zone)
1728 goto out_destroy_bmap_free_item_zone;
1730 xfs_da_state_zone = kmem_zone_init(sizeof(xfs_da_state_t),
1732 if (!xfs_da_state_zone)
1733 goto out_destroy_btree_cur_zone;
1735 xfs_dabuf_zone = kmem_zone_init(sizeof(xfs_dabuf_t), "xfs_dabuf");
1736 if (!xfs_dabuf_zone)
1737 goto out_destroy_da_state_zone;
1739 xfs_ifork_zone = kmem_zone_init(sizeof(xfs_ifork_t), "xfs_ifork");
1740 if (!xfs_ifork_zone)
1741 goto out_destroy_dabuf_zone;
1743 xfs_trans_zone = kmem_zone_init(sizeof(xfs_trans_t), "xfs_trans");
1744 if (!xfs_trans_zone)
1745 goto out_destroy_ifork_zone;
1748 * The size of the zone allocated buf log item is the maximum
1749 * size possible under XFS. This wastes a little bit of memory,
1750 * but it is much faster.
1752 xfs_buf_item_zone = kmem_zone_init((sizeof(xfs_buf_log_item_t) +
1753 (((XFS_MAX_BLOCKSIZE / XFS_BLI_CHUNK) /
1754 NBWORD) * sizeof(int))), "xfs_buf_item");
1755 if (!xfs_buf_item_zone)
1756 goto out_destroy_trans_zone;
1758 xfs_efd_zone = kmem_zone_init((sizeof(xfs_efd_log_item_t) +
1759 ((XFS_EFD_MAX_FAST_EXTENTS - 1) *
1760 sizeof(xfs_extent_t))), "xfs_efd_item");
1762 goto out_destroy_buf_item_zone;
1764 xfs_efi_zone = kmem_zone_init((sizeof(xfs_efi_log_item_t) +
1765 ((XFS_EFI_MAX_FAST_EXTENTS - 1) *
1766 sizeof(xfs_extent_t))), "xfs_efi_item");
1768 goto out_destroy_efd_zone;
1771 kmem_zone_init_flags(sizeof(xfs_inode_t), "xfs_inode",
1772 KM_ZONE_HWALIGN | KM_ZONE_RECLAIM | KM_ZONE_SPREAD,
1773 xfs_fs_inode_init_once);
1774 if (!xfs_inode_zone)
1775 goto out_destroy_efi_zone;
1778 kmem_zone_init_flags(sizeof(xfs_inode_log_item_t), "xfs_ili",
1779 KM_ZONE_SPREAD, NULL);
1781 goto out_destroy_inode_zone;
1785 out_destroy_inode_zone:
1786 kmem_zone_destroy(xfs_inode_zone);
1787 out_destroy_efi_zone:
1788 kmem_zone_destroy(xfs_efi_zone);
1789 out_destroy_efd_zone:
1790 kmem_zone_destroy(xfs_efd_zone);
1791 out_destroy_buf_item_zone:
1792 kmem_zone_destroy(xfs_buf_item_zone);
1793 out_destroy_trans_zone:
1794 kmem_zone_destroy(xfs_trans_zone);
1795 out_destroy_ifork_zone:
1796 kmem_zone_destroy(xfs_ifork_zone);
1797 out_destroy_dabuf_zone:
1798 kmem_zone_destroy(xfs_dabuf_zone);
1799 out_destroy_da_state_zone:
1800 kmem_zone_destroy(xfs_da_state_zone);
1801 out_destroy_btree_cur_zone:
1802 kmem_zone_destroy(xfs_btree_cur_zone);
1803 out_destroy_bmap_free_item_zone:
1804 kmem_zone_destroy(xfs_bmap_free_item_zone);
1805 out_destroy_log_ticket_zone:
1806 kmem_zone_destroy(xfs_log_ticket_zone);
1807 out_destroy_ioend_pool:
1808 mempool_destroy(xfs_ioend_pool);
1809 out_destroy_ioend_zone:
1810 kmem_zone_destroy(xfs_ioend_zone);
1816 xfs_destroy_zones(void)
1818 kmem_zone_destroy(xfs_ili_zone);
1819 kmem_zone_destroy(xfs_inode_zone);
1820 kmem_zone_destroy(xfs_efi_zone);
1821 kmem_zone_destroy(xfs_efd_zone);
1822 kmem_zone_destroy(xfs_buf_item_zone);
1823 kmem_zone_destroy(xfs_trans_zone);
1824 kmem_zone_destroy(xfs_ifork_zone);
1825 kmem_zone_destroy(xfs_dabuf_zone);
1826 kmem_zone_destroy(xfs_da_state_zone);
1827 kmem_zone_destroy(xfs_btree_cur_zone);
1828 kmem_zone_destroy(xfs_bmap_free_item_zone);
1829 kmem_zone_destroy(xfs_log_ticket_zone);
1830 mempool_destroy(xfs_ioend_pool);
1831 kmem_zone_destroy(xfs_ioend_zone);
1840 printk(KERN_INFO XFS_VERSION_STRING " with "
1841 XFS_BUILD_OPTIONS " enabled\n");
1846 error = xfs_init_zones();
1850 error = xfs_mru_cache_init();
1852 goto out_destroy_zones;
1854 error = xfs_filestream_init();
1856 goto out_mru_cache_uninit;
1858 error = xfs_buf_init();
1860 goto out_filestream_uninit;
1862 error = xfs_init_procfs();
1864 goto out_buf_terminate;
1866 error = xfs_sysctl_register();
1868 goto out_cleanup_procfs;
1872 error = register_filesystem(&xfs_fs_type);
1874 goto out_sysctl_unregister;
1877 out_sysctl_unregister:
1878 xfs_sysctl_unregister();
1880 xfs_cleanup_procfs();
1882 xfs_buf_terminate();
1883 out_filestream_uninit:
1884 xfs_filestream_uninit();
1885 out_mru_cache_uninit:
1886 xfs_mru_cache_uninit();
1888 xfs_destroy_zones();
1897 unregister_filesystem(&xfs_fs_type);
1898 xfs_sysctl_unregister();
1899 xfs_cleanup_procfs();
1900 xfs_buf_terminate();
1901 xfs_filestream_uninit();
1902 xfs_mru_cache_uninit();
1903 xfs_destroy_zones();
1906 module_init(init_xfs_fs);
1907 module_exit(exit_xfs_fs);
1909 MODULE_AUTHOR("Silicon Graphics, Inc.");
1910 MODULE_DESCRIPTION(XFS_VERSION_STRING " with " XFS_BUILD_OPTIONS " enabled");
1911 MODULE_LICENSE("GPL");