2 * Copyright (c) 2000-2006 Silicon Graphics, Inc.
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
7 * published by the Free Software Foundation.
9 * This program is distributed in the hope that it would be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write the Free Software Foundation,
16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
23 #include "xfs_trans.h"
27 #include "xfs_alloc.h"
28 #include "xfs_quota.h"
29 #include "xfs_mount.h"
30 #include "xfs_bmap_btree.h"
31 #include "xfs_alloc_btree.h"
32 #include "xfs_ialloc_btree.h"
33 #include "xfs_dinode.h"
34 #include "xfs_inode.h"
35 #include "xfs_btree.h"
36 #include "xfs_btree_trace.h"
37 #include "xfs_ialloc.h"
39 #include "xfs_rtalloc.h"
40 #include "xfs_error.h"
41 #include "xfs_itable.h"
42 #include "xfs_fsops.h"
44 #include "xfs_buf_item.h"
45 #include "xfs_utils.h"
46 #include "xfs_vnodeops.h"
47 #include "xfs_log_priv.h"
48 #include "xfs_trans_priv.h"
49 #include "xfs_filestream.h"
50 #include "xfs_da_btree.h"
51 #include "xfs_extfree_item.h"
52 #include "xfs_mru_cache.h"
53 #include "xfs_inode_item.h"
55 #include "xfs_trace.h"
57 #include <linux/namei.h>
58 #include <linux/init.h>
59 #include <linux/slab.h>
60 #include <linux/mount.h>
61 #include <linux/mempool.h>
62 #include <linux/writeback.h>
63 #include <linux/kthread.h>
64 #include <linux/freezer.h>
65 #include <linux/parser.h>
67 static const struct super_operations xfs_super_operations;
68 static kmem_zone_t *xfs_ioend_zone;
69 mempool_t *xfs_ioend_pool;
71 #define MNTOPT_LOGBUFS "logbufs" /* number of XFS log buffers */
72 #define MNTOPT_LOGBSIZE "logbsize" /* size of XFS log buffers */
73 #define MNTOPT_LOGDEV "logdev" /* log device */
74 #define MNTOPT_RTDEV "rtdev" /* realtime I/O device */
75 #define MNTOPT_BIOSIZE "biosize" /* log2 of preferred buffered io size */
76 #define MNTOPT_WSYNC "wsync" /* safe-mode nfs compatible mount */
77 #define MNTOPT_NOALIGN "noalign" /* turn off stripe alignment */
78 #define MNTOPT_SWALLOC "swalloc" /* turn on stripe width allocation */
79 #define MNTOPT_SUNIT "sunit" /* data volume stripe unit */
80 #define MNTOPT_SWIDTH "swidth" /* data volume stripe width */
81 #define MNTOPT_NOUUID "nouuid" /* ignore filesystem UUID */
82 #define MNTOPT_MTPT "mtpt" /* filesystem mount point */
83 #define MNTOPT_GRPID "grpid" /* group-ID from parent directory */
84 #define MNTOPT_NOGRPID "nogrpid" /* group-ID from current process */
85 #define MNTOPT_BSDGROUPS "bsdgroups" /* group-ID from parent directory */
86 #define MNTOPT_SYSVGROUPS "sysvgroups" /* group-ID from current process */
87 #define MNTOPT_ALLOCSIZE "allocsize" /* preferred allocation size */
88 #define MNTOPT_NORECOVERY "norecovery" /* don't run XFS recovery */
89 #define MNTOPT_BARRIER "barrier" /* use writer barriers for log write and
90 * unwritten extent conversion */
91 #define MNTOPT_NOBARRIER "nobarrier" /* .. disable */
92 #define MNTOPT_64BITINODE "inode64" /* inodes can be allocated anywhere */
93 #define MNTOPT_IKEEP "ikeep" /* do not free empty inode clusters */
94 #define MNTOPT_NOIKEEP "noikeep" /* free empty inode clusters */
95 #define MNTOPT_LARGEIO "largeio" /* report large I/O sizes in stat() */
96 #define MNTOPT_NOLARGEIO "nolargeio" /* do not report large I/O sizes
98 #define MNTOPT_ATTR2 "attr2" /* do use attr2 attribute format */
99 #define MNTOPT_NOATTR2 "noattr2" /* do not use attr2 attribute format */
100 #define MNTOPT_FILESTREAM "filestreams" /* use filestreams allocator */
101 #define MNTOPT_QUOTA "quota" /* disk quotas (user) */
102 #define MNTOPT_NOQUOTA "noquota" /* no quotas */
103 #define MNTOPT_USRQUOTA "usrquota" /* user quota enabled */
104 #define MNTOPT_GRPQUOTA "grpquota" /* group quota enabled */
105 #define MNTOPT_PRJQUOTA "prjquota" /* project quota enabled */
106 #define MNTOPT_UQUOTA "uquota" /* user quota (IRIX variant) */
107 #define MNTOPT_GQUOTA "gquota" /* group quota (IRIX variant) */
108 #define MNTOPT_PQUOTA "pquota" /* project quota (IRIX variant) */
109 #define MNTOPT_UQUOTANOENF "uqnoenforce"/* user quota limit enforcement */
110 #define MNTOPT_GQUOTANOENF "gqnoenforce"/* group quota limit enforcement */
111 #define MNTOPT_PQUOTANOENF "pqnoenforce"/* project quota limit enforcement */
112 #define MNTOPT_QUOTANOENF "qnoenforce" /* same as uqnoenforce */
113 #define MNTOPT_DELAYLOG "delaylog" /* Delayed loging enabled */
114 #define MNTOPT_NODELAYLOG "nodelaylog" /* Delayed loging disabled */
117 * Table driven mount option parser.
119 * Currently only used for remount, but it will be used for mount
120 * in the future, too.
123 Opt_barrier, Opt_nobarrier, Opt_err
126 static const match_table_t tokens = {
127 {Opt_barrier, "barrier"},
128 {Opt_nobarrier, "nobarrier"},
134 suffix_strtoul(char *s, char **endp, unsigned int base)
136 int last, shift_left_factor = 0;
139 last = strlen(value) - 1;
140 if (value[last] == 'K' || value[last] == 'k') {
141 shift_left_factor = 10;
144 if (value[last] == 'M' || value[last] == 'm') {
145 shift_left_factor = 20;
148 if (value[last] == 'G' || value[last] == 'g') {
149 shift_left_factor = 30;
153 return simple_strtoul((const char *)s, endp, base) << shift_left_factor;
157 * This function fills in xfs_mount_t fields based on mount args.
158 * Note: the superblock has _not_ yet been read in.
160 * Note that this function leaks the various device name allocations on
161 * failure. The caller takes care of them.
165 struct xfs_mount *mp,
168 struct super_block *sb = mp->m_super;
169 char *this_char, *value, *eov;
173 __uint8_t iosizelog = 0;
176 * Copy binary VFS mount flags we are interested in.
178 if (sb->s_flags & MS_RDONLY)
179 mp->m_flags |= XFS_MOUNT_RDONLY;
180 if (sb->s_flags & MS_DIRSYNC)
181 mp->m_flags |= XFS_MOUNT_DIRSYNC;
182 if (sb->s_flags & MS_SYNCHRONOUS)
183 mp->m_flags |= XFS_MOUNT_WSYNC;
186 * Set some default flags that could be cleared by the mount option
189 mp->m_flags |= XFS_MOUNT_BARRIER;
190 mp->m_flags |= XFS_MOUNT_COMPAT_IOSIZE;
191 mp->m_flags |= XFS_MOUNT_SMALL_INUMS;
194 * These can be overridden by the mount option parsing.
202 while ((this_char = strsep(&options, ",")) != NULL) {
205 if ((value = strchr(this_char, '=')) != NULL)
208 if (!strcmp(this_char, MNTOPT_LOGBUFS)) {
209 if (!value || !*value) {
211 "XFS: %s option requires an argument",
215 mp->m_logbufs = simple_strtoul(value, &eov, 10);
216 } else if (!strcmp(this_char, MNTOPT_LOGBSIZE)) {
217 if (!value || !*value) {
219 "XFS: %s option requires an argument",
223 mp->m_logbsize = suffix_strtoul(value, &eov, 10);
224 } else if (!strcmp(this_char, MNTOPT_LOGDEV)) {
225 if (!value || !*value) {
227 "XFS: %s option requires an argument",
231 mp->m_logname = kstrndup(value, MAXNAMELEN, GFP_KERNEL);
234 } else if (!strcmp(this_char, MNTOPT_MTPT)) {
236 "XFS: %s option not allowed on this system",
239 } else if (!strcmp(this_char, MNTOPT_RTDEV)) {
240 if (!value || !*value) {
242 "XFS: %s option requires an argument",
246 mp->m_rtname = kstrndup(value, MAXNAMELEN, GFP_KERNEL);
249 } else if (!strcmp(this_char, MNTOPT_BIOSIZE)) {
250 if (!value || !*value) {
252 "XFS: %s option requires an argument",
256 iosize = simple_strtoul(value, &eov, 10);
257 iosizelog = ffs(iosize) - 1;
258 } else if (!strcmp(this_char, MNTOPT_ALLOCSIZE)) {
259 if (!value || !*value) {
261 "XFS: %s option requires an argument",
265 iosize = suffix_strtoul(value, &eov, 10);
266 iosizelog = ffs(iosize) - 1;
267 } else if (!strcmp(this_char, MNTOPT_GRPID) ||
268 !strcmp(this_char, MNTOPT_BSDGROUPS)) {
269 mp->m_flags |= XFS_MOUNT_GRPID;
270 } else if (!strcmp(this_char, MNTOPT_NOGRPID) ||
271 !strcmp(this_char, MNTOPT_SYSVGROUPS)) {
272 mp->m_flags &= ~XFS_MOUNT_GRPID;
273 } else if (!strcmp(this_char, MNTOPT_WSYNC)) {
274 mp->m_flags |= XFS_MOUNT_WSYNC;
275 } else if (!strcmp(this_char, MNTOPT_NORECOVERY)) {
276 mp->m_flags |= XFS_MOUNT_NORECOVERY;
277 } else if (!strcmp(this_char, MNTOPT_NOALIGN)) {
278 mp->m_flags |= XFS_MOUNT_NOALIGN;
279 } else if (!strcmp(this_char, MNTOPT_SWALLOC)) {
280 mp->m_flags |= XFS_MOUNT_SWALLOC;
281 } else if (!strcmp(this_char, MNTOPT_SUNIT)) {
282 if (!value || !*value) {
284 "XFS: %s option requires an argument",
288 dsunit = simple_strtoul(value, &eov, 10);
289 } else if (!strcmp(this_char, MNTOPT_SWIDTH)) {
290 if (!value || !*value) {
292 "XFS: %s option requires an argument",
296 dswidth = simple_strtoul(value, &eov, 10);
297 } else if (!strcmp(this_char, MNTOPT_64BITINODE)) {
298 mp->m_flags &= ~XFS_MOUNT_SMALL_INUMS;
301 "XFS: %s option not allowed on this system",
305 } else if (!strcmp(this_char, MNTOPT_NOUUID)) {
306 mp->m_flags |= XFS_MOUNT_NOUUID;
307 } else if (!strcmp(this_char, MNTOPT_BARRIER)) {
308 mp->m_flags |= XFS_MOUNT_BARRIER;
309 } else if (!strcmp(this_char, MNTOPT_NOBARRIER)) {
310 mp->m_flags &= ~XFS_MOUNT_BARRIER;
311 } else if (!strcmp(this_char, MNTOPT_IKEEP)) {
312 mp->m_flags |= XFS_MOUNT_IKEEP;
313 } else if (!strcmp(this_char, MNTOPT_NOIKEEP)) {
314 mp->m_flags &= ~XFS_MOUNT_IKEEP;
315 } else if (!strcmp(this_char, MNTOPT_LARGEIO)) {
316 mp->m_flags &= ~XFS_MOUNT_COMPAT_IOSIZE;
317 } else if (!strcmp(this_char, MNTOPT_NOLARGEIO)) {
318 mp->m_flags |= XFS_MOUNT_COMPAT_IOSIZE;
319 } else if (!strcmp(this_char, MNTOPT_ATTR2)) {
320 mp->m_flags |= XFS_MOUNT_ATTR2;
321 } else if (!strcmp(this_char, MNTOPT_NOATTR2)) {
322 mp->m_flags &= ~XFS_MOUNT_ATTR2;
323 mp->m_flags |= XFS_MOUNT_NOATTR2;
324 } else if (!strcmp(this_char, MNTOPT_FILESTREAM)) {
325 mp->m_flags |= XFS_MOUNT_FILESTREAMS;
326 } else if (!strcmp(this_char, MNTOPT_NOQUOTA)) {
327 mp->m_qflags &= ~(XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE |
328 XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE |
329 XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE |
330 XFS_UQUOTA_ENFD | XFS_OQUOTA_ENFD);
331 } else if (!strcmp(this_char, MNTOPT_QUOTA) ||
332 !strcmp(this_char, MNTOPT_UQUOTA) ||
333 !strcmp(this_char, MNTOPT_USRQUOTA)) {
334 mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE |
336 } else if (!strcmp(this_char, MNTOPT_QUOTANOENF) ||
337 !strcmp(this_char, MNTOPT_UQUOTANOENF)) {
338 mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE);
339 mp->m_qflags &= ~XFS_UQUOTA_ENFD;
340 } else if (!strcmp(this_char, MNTOPT_PQUOTA) ||
341 !strcmp(this_char, MNTOPT_PRJQUOTA)) {
342 mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE |
344 } else if (!strcmp(this_char, MNTOPT_PQUOTANOENF)) {
345 mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE);
346 mp->m_qflags &= ~XFS_OQUOTA_ENFD;
347 } else if (!strcmp(this_char, MNTOPT_GQUOTA) ||
348 !strcmp(this_char, MNTOPT_GRPQUOTA)) {
349 mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE |
351 } else if (!strcmp(this_char, MNTOPT_GQUOTANOENF)) {
352 mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE);
353 mp->m_qflags &= ~XFS_OQUOTA_ENFD;
354 } else if (!strcmp(this_char, MNTOPT_DELAYLOG)) {
355 mp->m_flags |= XFS_MOUNT_DELAYLOG;
356 } else if (!strcmp(this_char, MNTOPT_NODELAYLOG)) {
357 mp->m_flags &= ~XFS_MOUNT_DELAYLOG;
358 } else if (!strcmp(this_char, "ihashsize")) {
360 "XFS: ihashsize no longer used, option is deprecated.");
361 } else if (!strcmp(this_char, "osyncisdsync")) {
363 "XFS: osyncisdsync has no effect, option is deprecated.");
364 } else if (!strcmp(this_char, "osyncisosync")) {
366 "XFS: osyncisosync has no effect, option is deprecated.");
367 } else if (!strcmp(this_char, "irixsgid")) {
369 "XFS: irixsgid is now a sysctl(2) variable, option is deprecated.");
372 "XFS: unknown mount option [%s].", this_char);
378 * no recovery flag requires a read-only mount
380 if ((mp->m_flags & XFS_MOUNT_NORECOVERY) &&
381 !(mp->m_flags & XFS_MOUNT_RDONLY)) {
382 cmn_err(CE_WARN, "XFS: no-recovery mounts must be read-only.");
386 if ((mp->m_flags & XFS_MOUNT_NOALIGN) && (dsunit || dswidth)) {
388 "XFS: sunit and swidth options incompatible with the noalign option");
392 #ifndef CONFIG_XFS_QUOTA
393 if (XFS_IS_QUOTA_RUNNING(mp)) {
395 "XFS: quota support not available in this kernel.");
400 if ((mp->m_qflags & (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE)) &&
401 (mp->m_qflags & (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE))) {
403 "XFS: cannot mount with both project and group quota");
407 if ((dsunit && !dswidth) || (!dsunit && dswidth)) {
409 "XFS: sunit and swidth must be specified together");
413 if (dsunit && (dswidth % dsunit != 0)) {
415 "XFS: stripe width (%d) must be a multiple of the stripe unit (%d)",
421 if (!(mp->m_flags & XFS_MOUNT_NOALIGN)) {
423 * At this point the superblock has not been read
424 * in, therefore we do not know the block size.
425 * Before the mount call ends we will convert
429 mp->m_dalign = dsunit;
430 mp->m_flags |= XFS_MOUNT_RETERR;
434 mp->m_swidth = dswidth;
437 if (mp->m_logbufs != -1 &&
438 mp->m_logbufs != 0 &&
439 (mp->m_logbufs < XLOG_MIN_ICLOGS ||
440 mp->m_logbufs > XLOG_MAX_ICLOGS)) {
442 "XFS: invalid logbufs value: %d [not %d-%d]",
443 mp->m_logbufs, XLOG_MIN_ICLOGS, XLOG_MAX_ICLOGS);
444 return XFS_ERROR(EINVAL);
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 "XFS: invalid logbufsize: %d [not 16k,32k,64k,128k or 256k]",
454 return XFS_ERROR(EINVAL);
457 mp->m_fsname = kstrndup(sb->s_id, MAXNAMELEN, GFP_KERNEL);
460 mp->m_fsname_len = strlen(mp->m_fsname) + 1;
463 if (iosizelog > XFS_MAX_IO_LOG ||
464 iosizelog < XFS_MIN_IO_LOG) {
466 "XFS: invalid log iosize: %d [not %d-%d]",
467 iosizelog, XFS_MIN_IO_LOG,
469 return XFS_ERROR(EINVAL);
472 mp->m_flags |= XFS_MOUNT_DFLT_IOSIZE;
473 mp->m_readio_log = iosizelog;
474 mp->m_writeio_log = iosizelog;
480 struct proc_xfs_info {
487 struct xfs_mount *mp,
490 static struct proc_xfs_info xfs_info_set[] = {
491 /* the few simple ones we can get from the mount struct */
492 { XFS_MOUNT_IKEEP, "," MNTOPT_IKEEP },
493 { XFS_MOUNT_WSYNC, "," MNTOPT_WSYNC },
494 { XFS_MOUNT_NOALIGN, "," MNTOPT_NOALIGN },
495 { XFS_MOUNT_SWALLOC, "," MNTOPT_SWALLOC },
496 { XFS_MOUNT_NOUUID, "," MNTOPT_NOUUID },
497 { XFS_MOUNT_NORECOVERY, "," MNTOPT_NORECOVERY },
498 { XFS_MOUNT_ATTR2, "," MNTOPT_ATTR2 },
499 { XFS_MOUNT_FILESTREAMS, "," MNTOPT_FILESTREAM },
500 { XFS_MOUNT_GRPID, "," MNTOPT_GRPID },
501 { XFS_MOUNT_DELAYLOG, "," MNTOPT_DELAYLOG },
504 static struct proc_xfs_info xfs_info_unset[] = {
505 /* the few simple ones we can get from the mount struct */
506 { XFS_MOUNT_COMPAT_IOSIZE, "," MNTOPT_LARGEIO },
507 { XFS_MOUNT_BARRIER, "," MNTOPT_NOBARRIER },
508 { XFS_MOUNT_SMALL_INUMS, "," MNTOPT_64BITINODE },
511 struct proc_xfs_info *xfs_infop;
513 for (xfs_infop = xfs_info_set; xfs_infop->flag; xfs_infop++) {
514 if (mp->m_flags & xfs_infop->flag)
515 seq_puts(m, xfs_infop->str);
517 for (xfs_infop = xfs_info_unset; xfs_infop->flag; xfs_infop++) {
518 if (!(mp->m_flags & xfs_infop->flag))
519 seq_puts(m, xfs_infop->str);
522 if (mp->m_flags & XFS_MOUNT_DFLT_IOSIZE)
523 seq_printf(m, "," MNTOPT_ALLOCSIZE "=%dk",
524 (int)(1 << mp->m_writeio_log) >> 10);
526 if (mp->m_logbufs > 0)
527 seq_printf(m, "," MNTOPT_LOGBUFS "=%d", mp->m_logbufs);
528 if (mp->m_logbsize > 0)
529 seq_printf(m, "," MNTOPT_LOGBSIZE "=%dk", mp->m_logbsize >> 10);
532 seq_printf(m, "," MNTOPT_LOGDEV "=%s", mp->m_logname);
534 seq_printf(m, "," MNTOPT_RTDEV "=%s", mp->m_rtname);
536 if (mp->m_dalign > 0)
537 seq_printf(m, "," MNTOPT_SUNIT "=%d",
538 (int)XFS_FSB_TO_BB(mp, mp->m_dalign));
539 if (mp->m_swidth > 0)
540 seq_printf(m, "," MNTOPT_SWIDTH "=%d",
541 (int)XFS_FSB_TO_BB(mp, mp->m_swidth));
543 if (mp->m_qflags & (XFS_UQUOTA_ACCT|XFS_UQUOTA_ENFD))
544 seq_puts(m, "," MNTOPT_USRQUOTA);
545 else if (mp->m_qflags & XFS_UQUOTA_ACCT)
546 seq_puts(m, "," MNTOPT_UQUOTANOENF);
548 /* Either project or group quotas can be active, not both */
550 if (mp->m_qflags & XFS_PQUOTA_ACCT) {
551 if (mp->m_qflags & XFS_OQUOTA_ENFD)
552 seq_puts(m, "," MNTOPT_PRJQUOTA);
554 seq_puts(m, "," MNTOPT_PQUOTANOENF);
555 } else if (mp->m_qflags & XFS_GQUOTA_ACCT) {
556 if (mp->m_qflags & XFS_OQUOTA_ENFD)
557 seq_puts(m, "," MNTOPT_GRPQUOTA);
559 seq_puts(m, "," MNTOPT_GQUOTANOENF);
562 if (!(mp->m_qflags & XFS_ALL_QUOTA_ACCT))
563 seq_puts(m, "," MNTOPT_NOQUOTA);
569 unsigned int blockshift)
571 unsigned int pagefactor = 1;
572 unsigned int bitshift = BITS_PER_LONG - 1;
574 /* Figure out maximum filesize, on Linux this can depend on
575 * the filesystem blocksize (on 32 bit platforms).
576 * __block_write_begin does this in an [unsigned] long...
577 * page->index << (PAGE_CACHE_SHIFT - bbits)
578 * So, for page sized blocks (4K on 32 bit platforms),
579 * this wraps at around 8Tb (hence MAX_LFS_FILESIZE which is
580 * (((u64)PAGE_CACHE_SIZE << (BITS_PER_LONG-1))-1)
581 * but for smaller blocksizes it is less (bbits = log2 bsize).
582 * Note1: get_block_t takes a long (implicit cast from above)
583 * Note2: The Large Block Device (LBD and HAVE_SECTOR_T) patch
584 * can optionally convert the [unsigned] long from above into
585 * an [unsigned] long long.
588 #if BITS_PER_LONG == 32
589 # if defined(CONFIG_LBDAF)
590 ASSERT(sizeof(sector_t) == 8);
591 pagefactor = PAGE_CACHE_SIZE;
592 bitshift = BITS_PER_LONG;
594 pagefactor = PAGE_CACHE_SIZE >> (PAGE_CACHE_SHIFT - blockshift);
598 return (((__uint64_t)pagefactor) << bitshift) - 1;
605 struct block_device **bdevp)
609 *bdevp = blkdev_get_by_path(name, FMODE_READ|FMODE_WRITE|FMODE_EXCL,
611 if (IS_ERR(*bdevp)) {
612 error = PTR_ERR(*bdevp);
613 printk("XFS: Invalid device [%s], error=%d\n", name, error);
621 struct block_device *bdev)
624 blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL);
628 * Try to write out the superblock using barriers.
634 xfs_buf_t *sbp = xfs_getsb(mp, 0);
639 XFS_BUF_UNDELAYWRITE(sbp);
641 XFS_BUF_UNASYNC(sbp);
642 XFS_BUF_ORDERED(sbp);
645 error = xfs_buf_iowait(sbp);
648 * Clear all the flags we set and possible error state in the
649 * buffer. We only did the write to try out whether barriers
650 * worked and shouldn't leave any traces in the superblock
654 XFS_BUF_ERROR(sbp, 0);
655 XFS_BUF_UNORDERED(sbp);
662 xfs_mountfs_check_barriers(xfs_mount_t *mp)
666 if (mp->m_logdev_targp != mp->m_ddev_targp) {
667 xfs_fs_cmn_err(CE_NOTE, mp,
668 "Disabling barriers, not supported with external log device");
669 mp->m_flags &= ~XFS_MOUNT_BARRIER;
673 if (xfs_readonly_buftarg(mp->m_ddev_targp)) {
674 xfs_fs_cmn_err(CE_NOTE, mp,
675 "Disabling barriers, underlying device is readonly");
676 mp->m_flags &= ~XFS_MOUNT_BARRIER;
680 error = xfs_barrier_test(mp);
682 xfs_fs_cmn_err(CE_NOTE, mp,
683 "Disabling barriers, trial barrier write failed");
684 mp->m_flags &= ~XFS_MOUNT_BARRIER;
690 xfs_blkdev_issue_flush(
691 xfs_buftarg_t *buftarg)
693 blkdev_issue_flush(buftarg->bt_bdev, GFP_KERNEL, NULL);
698 struct xfs_mount *mp)
700 if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp) {
701 struct block_device *logdev = mp->m_logdev_targp->bt_bdev;
702 xfs_free_buftarg(mp, mp->m_logdev_targp);
703 xfs_blkdev_put(logdev);
705 if (mp->m_rtdev_targp) {
706 struct block_device *rtdev = mp->m_rtdev_targp->bt_bdev;
707 xfs_free_buftarg(mp, mp->m_rtdev_targp);
708 xfs_blkdev_put(rtdev);
710 xfs_free_buftarg(mp, mp->m_ddev_targp);
714 * The file system configurations are:
715 * (1) device (partition) with data and internal log
716 * (2) logical volume with data and log subvolumes.
717 * (3) logical volume with data, log, and realtime subvolumes.
719 * We only have to handle opening the log and realtime volumes here if
720 * they are present. The data subvolume has already been opened by
721 * get_sb_bdev() and is stored in sb->s_bdev.
725 struct xfs_mount *mp)
727 struct block_device *ddev = mp->m_super->s_bdev;
728 struct block_device *logdev = NULL, *rtdev = NULL;
732 * Open real time and log devices - order is important.
735 error = xfs_blkdev_get(mp, mp->m_logname, &logdev);
741 error = xfs_blkdev_get(mp, mp->m_rtname, &rtdev);
743 goto out_close_logdev;
745 if (rtdev == ddev || rtdev == logdev) {
747 "XFS: Cannot mount filesystem with identical rtdev and ddev/logdev.");
749 goto out_close_rtdev;
754 * Setup xfs_mount buffer target pointers
757 mp->m_ddev_targp = xfs_alloc_buftarg(mp, ddev, 0, mp->m_fsname);
758 if (!mp->m_ddev_targp)
759 goto out_close_rtdev;
762 mp->m_rtdev_targp = xfs_alloc_buftarg(mp, rtdev, 1,
764 if (!mp->m_rtdev_targp)
765 goto out_free_ddev_targ;
768 if (logdev && logdev != ddev) {
769 mp->m_logdev_targp = xfs_alloc_buftarg(mp, logdev, 1,
771 if (!mp->m_logdev_targp)
772 goto out_free_rtdev_targ;
774 mp->m_logdev_targp = mp->m_ddev_targp;
780 if (mp->m_rtdev_targp)
781 xfs_free_buftarg(mp, mp->m_rtdev_targp);
783 xfs_free_buftarg(mp, mp->m_ddev_targp);
786 xfs_blkdev_put(rtdev);
788 if (logdev && logdev != ddev)
789 xfs_blkdev_put(logdev);
795 * Setup xfs_mount buffer target pointers based on superblock
799 struct xfs_mount *mp)
803 error = xfs_setsize_buftarg(mp->m_ddev_targp, mp->m_sb.sb_blocksize,
804 mp->m_sb.sb_sectsize);
808 if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp) {
809 unsigned int log_sector_size = BBSIZE;
811 if (xfs_sb_version_hassector(&mp->m_sb))
812 log_sector_size = mp->m_sb.sb_logsectsize;
813 error = xfs_setsize_buftarg(mp->m_logdev_targp,
814 mp->m_sb.sb_blocksize,
819 if (mp->m_rtdev_targp) {
820 error = xfs_setsize_buftarg(mp->m_rtdev_targp,
821 mp->m_sb.sb_blocksize,
822 mp->m_sb.sb_sectsize);
831 * XFS AIL push thread support
835 struct xfs_ail *ailp,
836 xfs_lsn_t threshold_lsn)
838 ailp->xa_target = threshold_lsn;
839 wake_up_process(ailp->xa_task);
846 struct xfs_ail *ailp = data;
847 xfs_lsn_t last_pushed_lsn = 0;
848 long tout = 0; /* milliseconds */
850 while (!kthread_should_stop()) {
851 schedule_timeout_interruptible(tout ?
852 msecs_to_jiffies(tout) : MAX_SCHEDULE_TIMEOUT);
857 ASSERT(ailp->xa_mount->m_log);
858 if (XFS_FORCED_SHUTDOWN(ailp->xa_mount))
861 tout = xfsaild_push(ailp, &last_pushed_lsn);
869 struct xfs_ail *ailp)
872 ailp->xa_task = kthread_run(xfsaild, ailp, "xfsaild/%s",
873 ailp->xa_mount->m_fsname);
874 if (IS_ERR(ailp->xa_task))
875 return -PTR_ERR(ailp->xa_task);
881 struct xfs_ail *ailp)
883 kthread_stop(ailp->xa_task);
887 /* Catch misguided souls that try to use this interface on XFS */
888 STATIC struct inode *
890 struct super_block *sb)
897 * Now that the generic code is guaranteed not to be accessing
898 * the linux inode, we can reclaim the inode.
901 xfs_fs_destroy_inode(
904 struct xfs_inode *ip = XFS_I(inode);
906 trace_xfs_destroy_inode(ip);
908 XFS_STATS_INC(vn_reclaim);
910 /* bad inode, get out here ASAP */
911 if (is_bad_inode(inode))
916 ASSERT(XFS_FORCED_SHUTDOWN(ip->i_mount) || ip->i_delayed_blks == 0);
919 * We should never get here with one of the reclaim flags already set.
921 ASSERT_ALWAYS(!xfs_iflags_test(ip, XFS_IRECLAIMABLE));
922 ASSERT_ALWAYS(!xfs_iflags_test(ip, XFS_IRECLAIM));
925 * We always use background reclaim here because even if the
926 * inode is clean, it still may be under IO and hence we have
927 * to take the flush lock. The background reclaim path handles
928 * this more efficiently than we can here, so simply let background
929 * reclaim tear down all inodes.
932 xfs_inode_set_reclaim_tag(ip);
936 * Slab object creation initialisation for the XFS inode.
937 * This covers only the idempotent fields in the XFS inode;
938 * all other fields need to be initialised on allocation
939 * from the slab. This avoids the need to repeatedly intialise
940 * fields in the xfs inode that left in the initialise state
941 * when freeing the inode.
944 xfs_fs_inode_init_once(
947 struct xfs_inode *ip = inode;
949 memset(ip, 0, sizeof(struct xfs_inode));
952 inode_init_once(VFS_I(ip));
955 atomic_set(&ip->i_iocount, 0);
956 atomic_set(&ip->i_pincount, 0);
957 spin_lock_init(&ip->i_flags_lock);
958 init_waitqueue_head(&ip->i_ipin_wait);
960 * Because we want to use a counting completion, complete
961 * the flush completion once to allow a single access to
962 * the flush completion without blocking.
964 init_completion(&ip->i_flush);
965 complete(&ip->i_flush);
967 mrlock_init(&ip->i_lock, MRLOCK_ALLOW_EQUAL_PRI|MRLOCK_BARRIER,
968 "xfsino", ip->i_ino);
972 * Dirty the XFS inode when mark_inode_dirty_sync() is called so that
973 * we catch unlogged VFS level updates to the inode.
975 * We need the barrier() to maintain correct ordering between unlogged
976 * updates and the transaction commit code that clears the i_update_core
977 * field. This requires all updates to be completed before marking the
985 XFS_I(inode)->i_update_core = 1;
990 struct xfs_inode *ip)
992 struct xfs_mount *mp = ip->i_mount;
993 struct xfs_trans *tp;
996 xfs_iunlock(ip, XFS_ILOCK_SHARED);
997 tp = xfs_trans_alloc(mp, XFS_TRANS_FSYNC_TS);
998 error = xfs_trans_reserve(tp, 0, XFS_FSYNC_TS_LOG_RES(mp), 0, 0, 0);
1001 xfs_trans_cancel(tp, 0);
1002 /* we need to return with the lock hold shared */
1003 xfs_ilock(ip, XFS_ILOCK_SHARED);
1007 xfs_ilock(ip, XFS_ILOCK_EXCL);
1010 * Note - it's possible that we might have pushed ourselves out of the
1011 * way during trans_reserve which would flush the inode. But there's
1012 * no guarantee that the inode buffer has actually gone out yet (it's
1013 * delwri). Plus the buffer could be pinned anyway if it's part of
1014 * an inode in another recent transaction. So we play it safe and
1015 * fire off the transaction anyway.
1017 xfs_trans_ijoin(tp, ip);
1018 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1019 error = xfs_trans_commit(tp, 0);
1020 xfs_ilock_demote(ip, XFS_ILOCK_EXCL);
1027 struct inode *inode,
1028 struct writeback_control *wbc)
1030 struct xfs_inode *ip = XFS_I(inode);
1031 struct xfs_mount *mp = ip->i_mount;
1034 trace_xfs_write_inode(ip);
1036 if (XFS_FORCED_SHUTDOWN(mp))
1037 return XFS_ERROR(EIO);
1039 if (wbc->sync_mode == WB_SYNC_ALL) {
1041 * Make sure the inode has made it it into the log. Instead
1042 * of forcing it all the way to stable storage using a
1043 * synchronous transaction we let the log force inside the
1044 * ->sync_fs call do that for thus, which reduces the number
1045 * of synchronous log foces dramatically.
1048 xfs_ilock(ip, XFS_ILOCK_SHARED);
1049 if (ip->i_update_core) {
1050 error = xfs_log_inode(ip);
1056 * We make this non-blocking if the inode is contended, return
1057 * EAGAIN to indicate to the caller that they did not succeed.
1058 * This prevents the flush path from blocking on inodes inside
1059 * another operation right now, they get caught later by
1062 if (!xfs_ilock_nowait(ip, XFS_ILOCK_SHARED))
1065 if (xfs_ipincount(ip) || !xfs_iflock_nowait(ip))
1069 * Now we have the flush lock and the inode is not pinned, we
1070 * can check if the inode is really clean as we know that
1071 * there are no pending transaction completions, it is not
1072 * waiting on the delayed write queue and there is no IO in
1075 if (xfs_inode_clean(ip)) {
1080 error = xfs_iflush(ip, 0);
1084 xfs_iunlock(ip, XFS_ILOCK_SHARED);
1087 * if we failed to write out the inode then mark
1088 * it dirty again so we'll try again later.
1091 xfs_mark_inode_dirty_sync(ip);
1097 struct inode *inode)
1099 xfs_inode_t *ip = XFS_I(inode);
1101 trace_xfs_evict_inode(ip);
1103 truncate_inode_pages(&inode->i_data, 0);
1104 end_writeback(inode);
1105 XFS_STATS_INC(vn_rele);
1106 XFS_STATS_INC(vn_remove);
1107 XFS_STATS_DEC(vn_active);
1110 * The iolock is used by the file system to coordinate reads,
1111 * writes, and block truncates. Up to this point the lock
1112 * protected concurrent accesses by users of the inode. But
1113 * from here forward we're doing some final processing of the
1114 * inode because we're done with it, and although we reuse the
1115 * iolock for protection it is really a distinct lock class
1116 * (in the lockdep sense) from before. To keep lockdep happy
1117 * (and basically indicate what we are doing), we explicitly
1118 * re-init the iolock here.
1120 ASSERT(!rwsem_is_locked(&ip->i_iolock.mr_lock));
1121 mrlock_init(&ip->i_iolock, MRLOCK_BARRIER, "xfsio", ip->i_ino);
1128 struct xfs_mount *mp)
1130 kfree(mp->m_fsname);
1131 kfree(mp->m_rtname);
1132 kfree(mp->m_logname);
1137 struct super_block *sb)
1139 struct xfs_mount *mp = XFS_M(sb);
1142 * Unregister the memory shrinker before we tear down the mount
1143 * structure so we don't have memory reclaim racing with us here.
1145 xfs_inode_shrinker_unregister(mp);
1149 * Blow away any referenced inode in the filestreams cache.
1150 * This can and will cause log traffic as inodes go inactive
1153 xfs_filestream_unmount(mp);
1155 XFS_bflush(mp->m_ddev_targp);
1159 xfs_icsb_destroy_counters(mp);
1160 xfs_close_devices(mp);
1161 xfs_free_fsname(mp);
1167 struct super_block *sb,
1170 struct xfs_mount *mp = XFS_M(sb);
1174 * Not much we can do for the first async pass. Writing out the
1175 * superblock would be counter-productive as we are going to redirty
1176 * when writing out other data and metadata (and writing out a single
1177 * block is quite fast anyway).
1179 * Try to asynchronously kick off quota syncing at least.
1182 xfs_qm_sync(mp, SYNC_TRYLOCK);
1186 error = xfs_quiesce_data(mp);
1191 int prev_sync_seq = mp->m_sync_seq;
1194 * The disk must be active because we're syncing.
1195 * We schedule xfssyncd now (now that the disk is
1196 * active) instead of later (when it might not be).
1198 wake_up_process(mp->m_sync_task);
1200 * We have to wait for the sync iteration to complete.
1201 * If we don't, the disk activity caused by the sync
1202 * will come after the sync is completed, and that
1203 * triggers another sync from laptop mode.
1205 wait_event(mp->m_wait_single_sync_task,
1206 mp->m_sync_seq != prev_sync_seq);
1214 struct dentry *dentry,
1215 struct kstatfs *statp)
1217 struct xfs_mount *mp = XFS_M(dentry->d_sb);
1218 xfs_sb_t *sbp = &mp->m_sb;
1219 struct xfs_inode *ip = XFS_I(dentry->d_inode);
1220 __uint64_t fakeinos, id;
1224 statp->f_type = XFS_SB_MAGIC;
1225 statp->f_namelen = MAXNAMELEN - 1;
1227 id = huge_encode_dev(mp->m_ddev_targp->bt_dev);
1228 statp->f_fsid.val[0] = (u32)id;
1229 statp->f_fsid.val[1] = (u32)(id >> 32);
1231 xfs_icsb_sync_counters(mp, XFS_ICSB_LAZY_COUNT);
1233 spin_lock(&mp->m_sb_lock);
1234 statp->f_bsize = sbp->sb_blocksize;
1235 lsize = sbp->sb_logstart ? sbp->sb_logblocks : 0;
1236 statp->f_blocks = sbp->sb_dblocks - lsize;
1237 statp->f_bfree = statp->f_bavail =
1238 sbp->sb_fdblocks - XFS_ALLOC_SET_ASIDE(mp);
1239 fakeinos = statp->f_bfree << sbp->sb_inopblog;
1241 MIN(sbp->sb_icount + fakeinos, (__uint64_t)XFS_MAXINUMBER);
1242 if (mp->m_maxicount)
1243 statp->f_files = min_t(typeof(statp->f_files),
1247 /* make sure statp->f_ffree does not underflow */
1248 ffree = statp->f_files - (sbp->sb_icount - sbp->sb_ifree);
1249 statp->f_ffree = max_t(__int64_t, ffree, 0);
1251 spin_unlock(&mp->m_sb_lock);
1253 if ((ip->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) ||
1254 ((mp->m_qflags & (XFS_PQUOTA_ACCT|XFS_OQUOTA_ENFD))) ==
1255 (XFS_PQUOTA_ACCT|XFS_OQUOTA_ENFD))
1256 xfs_qm_statvfs(ip, statp);
1261 xfs_save_resvblks(struct xfs_mount *mp)
1263 __uint64_t resblks = 0;
1265 mp->m_resblks_save = mp->m_resblks;
1266 xfs_reserve_blocks(mp, &resblks, NULL);
1270 xfs_restore_resvblks(struct xfs_mount *mp)
1274 if (mp->m_resblks_save) {
1275 resblks = mp->m_resblks_save;
1276 mp->m_resblks_save = 0;
1278 resblks = xfs_default_resblks(mp);
1280 xfs_reserve_blocks(mp, &resblks, NULL);
1285 struct super_block *sb,
1289 struct xfs_mount *mp = XFS_M(sb);
1290 substring_t args[MAX_OPT_ARGS];
1294 while ((p = strsep(&options, ",")) != NULL) {
1300 token = match_token(p, tokens, args);
1303 mp->m_flags |= XFS_MOUNT_BARRIER;
1306 * Test if barriers are actually working if we can,
1307 * else delay this check until the filesystem is
1310 if (!(mp->m_flags & XFS_MOUNT_RDONLY))
1311 xfs_mountfs_check_barriers(mp);
1314 mp->m_flags &= ~XFS_MOUNT_BARRIER;
1318 * Logically we would return an error here to prevent
1319 * users from believing they might have changed
1320 * mount options using remount which can't be changed.
1322 * But unfortunately mount(8) adds all options from
1323 * mtab and fstab to the mount arguments in some cases
1324 * so we can't blindly reject options, but have to
1325 * check for each specified option if it actually
1326 * differs from the currently set option and only
1327 * reject it if that's the case.
1329 * Until that is implemented we return success for
1330 * every remount request, and silently ignore all
1331 * options that we can't actually change.
1335 "XFS: mount option \"%s\" not supported for remount\n", p);
1344 if ((mp->m_flags & XFS_MOUNT_RDONLY) && !(*flags & MS_RDONLY)) {
1345 mp->m_flags &= ~XFS_MOUNT_RDONLY;
1346 if (mp->m_flags & XFS_MOUNT_BARRIER)
1347 xfs_mountfs_check_barriers(mp);
1350 * If this is the first remount to writeable state we
1351 * might have some superblock changes to update.
1353 if (mp->m_update_flags) {
1354 error = xfs_mount_log_sb(mp, mp->m_update_flags);
1357 "XFS: failed to write sb changes");
1360 mp->m_update_flags = 0;
1364 * Fill out the reserve pool if it is empty. Use the stashed
1365 * value if it is non-zero, otherwise go with the default.
1367 xfs_restore_resvblks(mp);
1371 if (!(mp->m_flags & XFS_MOUNT_RDONLY) && (*flags & MS_RDONLY)) {
1373 * After we have synced the data but before we sync the
1374 * metadata, we need to free up the reserve block pool so that
1375 * the used block count in the superblock on disk is correct at
1376 * the end of the remount. Stash the current reserve pool size
1377 * so that if we get remounted rw, we can return it to the same
1381 xfs_quiesce_data(mp);
1382 xfs_save_resvblks(mp);
1383 xfs_quiesce_attr(mp);
1384 mp->m_flags |= XFS_MOUNT_RDONLY;
1391 * Second stage of a freeze. The data is already frozen so we only
1392 * need to take care of the metadata. Once that's done write a dummy
1393 * record to dirty the log in case of a crash while frozen.
1397 struct super_block *sb)
1399 struct xfs_mount *mp = XFS_M(sb);
1401 xfs_save_resvblks(mp);
1402 xfs_quiesce_attr(mp);
1403 return -xfs_fs_log_dummy(mp, SYNC_WAIT);
1408 struct super_block *sb)
1410 struct xfs_mount *mp = XFS_M(sb);
1412 xfs_restore_resvblks(mp);
1417 xfs_fs_show_options(
1419 struct vfsmount *mnt)
1421 return -xfs_showargs(XFS_M(mnt->mnt_sb), m);
1425 * This function fills in xfs_mount_t fields based on mount args.
1426 * Note: the superblock _has_ now been read in.
1430 struct xfs_mount *mp)
1432 int ronly = (mp->m_flags & XFS_MOUNT_RDONLY);
1434 /* Fail a mount where the logbuf is smaller than the log stripe */
1435 if (xfs_sb_version_haslogv2(&mp->m_sb)) {
1436 if (mp->m_logbsize <= 0 &&
1437 mp->m_sb.sb_logsunit > XLOG_BIG_RECORD_BSIZE) {
1438 mp->m_logbsize = mp->m_sb.sb_logsunit;
1439 } else if (mp->m_logbsize > 0 &&
1440 mp->m_logbsize < mp->m_sb.sb_logsunit) {
1442 "XFS: logbuf size must be greater than or equal to log stripe size");
1443 return XFS_ERROR(EINVAL);
1446 /* Fail a mount if the logbuf is larger than 32K */
1447 if (mp->m_logbsize > XLOG_BIG_RECORD_BSIZE) {
1449 "XFS: logbuf size for version 1 logs must be 16K or 32K");
1450 return XFS_ERROR(EINVAL);
1455 * mkfs'ed attr2 will turn on attr2 mount unless explicitly
1456 * told by noattr2 to turn it off
1458 if (xfs_sb_version_hasattr2(&mp->m_sb) &&
1459 !(mp->m_flags & XFS_MOUNT_NOATTR2))
1460 mp->m_flags |= XFS_MOUNT_ATTR2;
1463 * prohibit r/w mounts of read-only filesystems
1465 if ((mp->m_sb.sb_flags & XFS_SBF_READONLY) && !ronly) {
1467 "XFS: cannot mount a read-only filesystem as read-write");
1468 return XFS_ERROR(EROFS);
1476 struct super_block *sb,
1481 struct xfs_mount *mp = NULL;
1482 int flags = 0, error = ENOMEM;
1484 mp = kzalloc(sizeof(struct xfs_mount), GFP_KERNEL);
1488 spin_lock_init(&mp->m_sb_lock);
1489 mutex_init(&mp->m_growlock);
1490 atomic_set(&mp->m_active_trans, 0);
1491 INIT_LIST_HEAD(&mp->m_sync_list);
1492 spin_lock_init(&mp->m_sync_lock);
1493 init_waitqueue_head(&mp->m_wait_single_sync_task);
1498 error = xfs_parseargs(mp, (char *)data);
1500 goto out_free_fsname;
1502 sb_min_blocksize(sb, BBSIZE);
1503 sb->s_xattr = xfs_xattr_handlers;
1504 sb->s_export_op = &xfs_export_operations;
1505 #ifdef CONFIG_XFS_QUOTA
1506 sb->s_qcop = &xfs_quotactl_operations;
1508 sb->s_op = &xfs_super_operations;
1511 flags |= XFS_MFSI_QUIET;
1513 error = xfs_open_devices(mp);
1515 goto out_free_fsname;
1517 error = xfs_icsb_init_counters(mp);
1519 goto out_close_devices;
1521 error = xfs_readsb(mp, flags);
1523 goto out_destroy_counters;
1525 error = xfs_finish_flags(mp);
1529 error = xfs_setup_devices(mp);
1533 if (mp->m_flags & XFS_MOUNT_BARRIER)
1534 xfs_mountfs_check_barriers(mp);
1536 error = xfs_filestream_mount(mp);
1540 error = xfs_mountfs(mp);
1542 goto out_filestream_unmount;
1544 sb->s_magic = XFS_SB_MAGIC;
1545 sb->s_blocksize = mp->m_sb.sb_blocksize;
1546 sb->s_blocksize_bits = ffs(sb->s_blocksize) - 1;
1547 sb->s_maxbytes = xfs_max_file_offset(sb->s_blocksize_bits);
1548 sb->s_time_gran = 1;
1549 set_posix_acl_flag(sb);
1551 root = igrab(VFS_I(mp->m_rootip));
1556 if (is_bad_inode(root)) {
1560 sb->s_root = d_alloc_root(root);
1566 error = xfs_syncd_init(mp);
1570 xfs_inode_shrinker_register(mp);
1574 out_filestream_unmount:
1575 xfs_filestream_unmount(mp);
1578 out_destroy_counters:
1579 xfs_icsb_destroy_counters(mp);
1581 xfs_close_devices(mp);
1583 xfs_free_fsname(mp);
1598 * Blow away any referenced inode in the filestreams cache.
1599 * This can and will cause log traffic as inodes go inactive
1602 xfs_filestream_unmount(mp);
1604 XFS_bflush(mp->m_ddev_targp);
1610 STATIC struct dentry *
1612 struct file_system_type *fs_type,
1614 const char *dev_name,
1617 return mount_bdev(fs_type, flags, dev_name, data, xfs_fs_fill_super);
1620 static const struct super_operations xfs_super_operations = {
1621 .alloc_inode = xfs_fs_alloc_inode,
1622 .destroy_inode = xfs_fs_destroy_inode,
1623 .dirty_inode = xfs_fs_dirty_inode,
1624 .write_inode = xfs_fs_write_inode,
1625 .evict_inode = xfs_fs_evict_inode,
1626 .put_super = xfs_fs_put_super,
1627 .sync_fs = xfs_fs_sync_fs,
1628 .freeze_fs = xfs_fs_freeze,
1629 .unfreeze_fs = xfs_fs_unfreeze,
1630 .statfs = xfs_fs_statfs,
1631 .remount_fs = xfs_fs_remount,
1632 .show_options = xfs_fs_show_options,
1635 static struct file_system_type xfs_fs_type = {
1636 .owner = THIS_MODULE,
1638 .mount = xfs_fs_mount,
1639 .kill_sb = kill_block_super,
1640 .fs_flags = FS_REQUIRES_DEV,
1644 xfs_init_zones(void)
1647 xfs_ioend_zone = kmem_zone_init(sizeof(xfs_ioend_t), "xfs_ioend");
1648 if (!xfs_ioend_zone)
1651 xfs_ioend_pool = mempool_create_slab_pool(4 * MAX_BUF_PER_PAGE,
1653 if (!xfs_ioend_pool)
1654 goto out_destroy_ioend_zone;
1656 xfs_log_ticket_zone = kmem_zone_init(sizeof(xlog_ticket_t),
1658 if (!xfs_log_ticket_zone)
1659 goto out_destroy_ioend_pool;
1661 xfs_bmap_free_item_zone = kmem_zone_init(sizeof(xfs_bmap_free_item_t),
1662 "xfs_bmap_free_item");
1663 if (!xfs_bmap_free_item_zone)
1664 goto out_destroy_log_ticket_zone;
1666 xfs_btree_cur_zone = kmem_zone_init(sizeof(xfs_btree_cur_t),
1668 if (!xfs_btree_cur_zone)
1669 goto out_destroy_bmap_free_item_zone;
1671 xfs_da_state_zone = kmem_zone_init(sizeof(xfs_da_state_t),
1673 if (!xfs_da_state_zone)
1674 goto out_destroy_btree_cur_zone;
1676 xfs_dabuf_zone = kmem_zone_init(sizeof(xfs_dabuf_t), "xfs_dabuf");
1677 if (!xfs_dabuf_zone)
1678 goto out_destroy_da_state_zone;
1680 xfs_ifork_zone = kmem_zone_init(sizeof(xfs_ifork_t), "xfs_ifork");
1681 if (!xfs_ifork_zone)
1682 goto out_destroy_dabuf_zone;
1684 xfs_trans_zone = kmem_zone_init(sizeof(xfs_trans_t), "xfs_trans");
1685 if (!xfs_trans_zone)
1686 goto out_destroy_ifork_zone;
1688 xfs_log_item_desc_zone =
1689 kmem_zone_init(sizeof(struct xfs_log_item_desc),
1690 "xfs_log_item_desc");
1691 if (!xfs_log_item_desc_zone)
1692 goto out_destroy_trans_zone;
1695 * The size of the zone allocated buf log item is the maximum
1696 * size possible under XFS. This wastes a little bit of memory,
1697 * but it is much faster.
1699 xfs_buf_item_zone = kmem_zone_init((sizeof(xfs_buf_log_item_t) +
1700 (((XFS_MAX_BLOCKSIZE / XFS_BLF_CHUNK) /
1701 NBWORD) * sizeof(int))), "xfs_buf_item");
1702 if (!xfs_buf_item_zone)
1703 goto out_destroy_log_item_desc_zone;
1705 xfs_efd_zone = kmem_zone_init((sizeof(xfs_efd_log_item_t) +
1706 ((XFS_EFD_MAX_FAST_EXTENTS - 1) *
1707 sizeof(xfs_extent_t))), "xfs_efd_item");
1709 goto out_destroy_buf_item_zone;
1711 xfs_efi_zone = kmem_zone_init((sizeof(xfs_efi_log_item_t) +
1712 ((XFS_EFI_MAX_FAST_EXTENTS - 1) *
1713 sizeof(xfs_extent_t))), "xfs_efi_item");
1715 goto out_destroy_efd_zone;
1718 kmem_zone_init_flags(sizeof(xfs_inode_t), "xfs_inode",
1719 KM_ZONE_HWALIGN | KM_ZONE_RECLAIM | KM_ZONE_SPREAD,
1720 xfs_fs_inode_init_once);
1721 if (!xfs_inode_zone)
1722 goto out_destroy_efi_zone;
1725 kmem_zone_init_flags(sizeof(xfs_inode_log_item_t), "xfs_ili",
1726 KM_ZONE_SPREAD, NULL);
1728 goto out_destroy_inode_zone;
1732 out_destroy_inode_zone:
1733 kmem_zone_destroy(xfs_inode_zone);
1734 out_destroy_efi_zone:
1735 kmem_zone_destroy(xfs_efi_zone);
1736 out_destroy_efd_zone:
1737 kmem_zone_destroy(xfs_efd_zone);
1738 out_destroy_buf_item_zone:
1739 kmem_zone_destroy(xfs_buf_item_zone);
1740 out_destroy_log_item_desc_zone:
1741 kmem_zone_destroy(xfs_log_item_desc_zone);
1742 out_destroy_trans_zone:
1743 kmem_zone_destroy(xfs_trans_zone);
1744 out_destroy_ifork_zone:
1745 kmem_zone_destroy(xfs_ifork_zone);
1746 out_destroy_dabuf_zone:
1747 kmem_zone_destroy(xfs_dabuf_zone);
1748 out_destroy_da_state_zone:
1749 kmem_zone_destroy(xfs_da_state_zone);
1750 out_destroy_btree_cur_zone:
1751 kmem_zone_destroy(xfs_btree_cur_zone);
1752 out_destroy_bmap_free_item_zone:
1753 kmem_zone_destroy(xfs_bmap_free_item_zone);
1754 out_destroy_log_ticket_zone:
1755 kmem_zone_destroy(xfs_log_ticket_zone);
1756 out_destroy_ioend_pool:
1757 mempool_destroy(xfs_ioend_pool);
1758 out_destroy_ioend_zone:
1759 kmem_zone_destroy(xfs_ioend_zone);
1765 xfs_destroy_zones(void)
1767 kmem_zone_destroy(xfs_ili_zone);
1768 kmem_zone_destroy(xfs_inode_zone);
1769 kmem_zone_destroy(xfs_efi_zone);
1770 kmem_zone_destroy(xfs_efd_zone);
1771 kmem_zone_destroy(xfs_buf_item_zone);
1772 kmem_zone_destroy(xfs_log_item_desc_zone);
1773 kmem_zone_destroy(xfs_trans_zone);
1774 kmem_zone_destroy(xfs_ifork_zone);
1775 kmem_zone_destroy(xfs_dabuf_zone);
1776 kmem_zone_destroy(xfs_da_state_zone);
1777 kmem_zone_destroy(xfs_btree_cur_zone);
1778 kmem_zone_destroy(xfs_bmap_free_item_zone);
1779 kmem_zone_destroy(xfs_log_ticket_zone);
1780 mempool_destroy(xfs_ioend_pool);
1781 kmem_zone_destroy(xfs_ioend_zone);
1790 printk(KERN_INFO XFS_VERSION_STRING " with "
1791 XFS_BUILD_OPTIONS " enabled\n");
1796 error = xfs_init_zones();
1800 error = xfs_mru_cache_init();
1802 goto out_destroy_zones;
1804 error = xfs_filestream_init();
1806 goto out_mru_cache_uninit;
1808 error = xfs_buf_init();
1810 goto out_filestream_uninit;
1812 error = xfs_init_procfs();
1814 goto out_buf_terminate;
1816 error = xfs_sysctl_register();
1818 goto out_cleanup_procfs;
1822 error = register_filesystem(&xfs_fs_type);
1824 goto out_sysctl_unregister;
1827 out_sysctl_unregister:
1828 xfs_sysctl_unregister();
1830 xfs_cleanup_procfs();
1832 xfs_buf_terminate();
1833 out_filestream_uninit:
1834 xfs_filestream_uninit();
1835 out_mru_cache_uninit:
1836 xfs_mru_cache_uninit();
1838 xfs_destroy_zones();
1847 unregister_filesystem(&xfs_fs_type);
1848 xfs_sysctl_unregister();
1849 xfs_cleanup_procfs();
1850 xfs_buf_terminate();
1851 xfs_filestream_uninit();
1852 xfs_mru_cache_uninit();
1853 xfs_destroy_zones();
1856 module_init(init_xfs_fs);
1857 module_exit(exit_xfs_fs);
1859 MODULE_AUTHOR("Silicon Graphics, Inc.");
1860 MODULE_DESCRIPTION(XFS_VERSION_STRING " with " XFS_BUILD_OPTIONS " enabled");
1861 MODULE_LICENSE("GPL");