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"
48 #include "xfs_ondisk.h"
50 #include <linux/namei.h>
51 #include <linux/init.h>
52 #include <linux/slab.h>
53 #include <linux/mount.h>
54 #include <linux/mempool.h>
55 #include <linux/writeback.h>
56 #include <linux/kthread.h>
57 #include <linux/freezer.h>
58 #include <linux/parser.h>
60 static const struct super_operations xfs_super_operations;
61 struct bio_set *xfs_ioend_bioset;
63 static struct kset *xfs_kset; /* top-level xfs sysfs dir */
65 static struct xfs_kobj xfs_dbg_kobj; /* global debug sysfs attrs */
69 * Table driven mount option parser.
72 Opt_logbufs, Opt_logbsize, Opt_logdev, Opt_rtdev, Opt_biosize,
73 Opt_wsync, Opt_noalign, Opt_swalloc, Opt_sunit, Opt_swidth, Opt_nouuid,
74 Opt_mtpt, Opt_grpid, Opt_nogrpid, Opt_bsdgroups, Opt_sysvgroups,
75 Opt_allocsize, Opt_norecovery, Opt_barrier, Opt_nobarrier,
76 Opt_inode64, Opt_inode32, Opt_ikeep, Opt_noikeep,
77 Opt_largeio, Opt_nolargeio, Opt_attr2, Opt_noattr2, Opt_filestreams,
78 Opt_quota, Opt_noquota, Opt_usrquota, Opt_grpquota, Opt_prjquota,
79 Opt_uquota, Opt_gquota, Opt_pquota,
80 Opt_uqnoenforce, Opt_gqnoenforce, Opt_pqnoenforce, Opt_qnoenforce,
81 Opt_discard, Opt_nodiscard, Opt_dax, Opt_err,
84 static const match_table_t tokens = {
85 {Opt_logbufs, "logbufs=%u"}, /* number of XFS log buffers */
86 {Opt_logbsize, "logbsize=%s"}, /* size of XFS log buffers */
87 {Opt_logdev, "logdev=%s"}, /* log device */
88 {Opt_rtdev, "rtdev=%s"}, /* realtime I/O device */
89 {Opt_biosize, "biosize=%u"}, /* log2 of preferred buffered io size */
90 {Opt_wsync, "wsync"}, /* safe-mode nfs compatible mount */
91 {Opt_noalign, "noalign"}, /* turn off stripe alignment */
92 {Opt_swalloc, "swalloc"}, /* turn on stripe width allocation */
93 {Opt_sunit, "sunit=%u"}, /* data volume stripe unit */
94 {Opt_swidth, "swidth=%u"}, /* data volume stripe width */
95 {Opt_nouuid, "nouuid"}, /* ignore filesystem UUID */
96 {Opt_mtpt, "mtpt"}, /* filesystem mount point */
97 {Opt_grpid, "grpid"}, /* group-ID from parent directory */
98 {Opt_nogrpid, "nogrpid"}, /* group-ID from current process */
99 {Opt_bsdgroups, "bsdgroups"}, /* group-ID from parent directory */
100 {Opt_sysvgroups,"sysvgroups"}, /* group-ID from current process */
101 {Opt_allocsize, "allocsize=%s"},/* preferred allocation size */
102 {Opt_norecovery,"norecovery"}, /* don't run XFS recovery */
103 {Opt_barrier, "barrier"}, /* use writer barriers for log write and
104 * unwritten extent conversion */
105 {Opt_nobarrier, "nobarrier"}, /* .. disable */
106 {Opt_inode64, "inode64"}, /* inodes can be allocated anywhere */
107 {Opt_inode32, "inode32"}, /* inode allocation limited to
108 * XFS_MAXINUMBER_32 */
109 {Opt_ikeep, "ikeep"}, /* do not free empty inode clusters */
110 {Opt_noikeep, "noikeep"}, /* free empty inode clusters */
111 {Opt_largeio, "largeio"}, /* report large I/O sizes in stat() */
112 {Opt_nolargeio, "nolargeio"}, /* do not report large I/O sizes
114 {Opt_attr2, "attr2"}, /* do use attr2 attribute format */
115 {Opt_noattr2, "noattr2"}, /* do not use attr2 attribute format */
116 {Opt_filestreams,"filestreams"},/* use filestreams allocator */
117 {Opt_quota, "quota"}, /* disk quotas (user) */
118 {Opt_noquota, "noquota"}, /* no quotas */
119 {Opt_usrquota, "usrquota"}, /* user quota enabled */
120 {Opt_grpquota, "grpquota"}, /* group quota enabled */
121 {Opt_prjquota, "prjquota"}, /* project quota enabled */
122 {Opt_uquota, "uquota"}, /* user quota (IRIX variant) */
123 {Opt_gquota, "gquota"}, /* group quota (IRIX variant) */
124 {Opt_pquota, "pquota"}, /* project quota (IRIX variant) */
125 {Opt_uqnoenforce,"uqnoenforce"},/* user quota limit enforcement */
126 {Opt_gqnoenforce,"gqnoenforce"},/* group quota limit enforcement */
127 {Opt_pqnoenforce,"pqnoenforce"},/* project quota limit enforcement */
128 {Opt_qnoenforce, "qnoenforce"}, /* same as uqnoenforce */
129 {Opt_discard, "discard"}, /* Discard unused blocks */
130 {Opt_nodiscard, "nodiscard"}, /* Do not discard unused blocks */
132 {Opt_dax, "dax"}, /* Enable direct access to bdev pages */
138 suffix_kstrtoint(const substring_t *s, unsigned int base, int *res)
140 int last, shift_left_factor = 0, _res;
144 value = match_strdup(s);
148 last = strlen(value) - 1;
149 if (value[last] == 'K' || value[last] == 'k') {
150 shift_left_factor = 10;
153 if (value[last] == 'M' || value[last] == 'm') {
154 shift_left_factor = 20;
157 if (value[last] == 'G' || value[last] == 'g') {
158 shift_left_factor = 30;
162 if (kstrtoint(value, base, &_res))
165 *res = _res << shift_left_factor;
170 * This function fills in xfs_mount_t fields based on mount args.
171 * Note: the superblock has _not_ yet been read in.
173 * Note that this function leaks the various device name allocations on
174 * failure. The caller takes care of them.
176 * *sb is const because this is also used to test options on the remount
177 * path, and we don't want this to have any side effects at remount time.
178 * Today this function does not change *sb, but just to future-proof...
182 struct xfs_mount *mp,
185 const struct super_block *sb = mp->m_super;
187 substring_t args[MAX_OPT_ARGS];
191 __uint8_t iosizelog = 0;
194 * set up the mount name first so all the errors will refer to the
197 mp->m_fsname = kstrndup(sb->s_id, MAXNAMELEN, GFP_KERNEL);
200 mp->m_fsname_len = strlen(mp->m_fsname) + 1;
203 * Copy binary VFS mount flags we are interested in.
205 if (sb->s_flags & MS_RDONLY)
206 mp->m_flags |= XFS_MOUNT_RDONLY;
207 if (sb->s_flags & MS_DIRSYNC)
208 mp->m_flags |= XFS_MOUNT_DIRSYNC;
209 if (sb->s_flags & MS_SYNCHRONOUS)
210 mp->m_flags |= XFS_MOUNT_WSYNC;
213 * Set some default flags that could be cleared by the mount option
216 mp->m_flags |= XFS_MOUNT_BARRIER;
217 mp->m_flags |= XFS_MOUNT_COMPAT_IOSIZE;
220 * These can be overridden by the mount option parsing.
228 while ((p = strsep(&options, ",")) != NULL) {
234 token = match_token(p, tokens, args);
237 if (match_int(args, &mp->m_logbufs))
241 if (suffix_kstrtoint(args, 10, &mp->m_logbsize))
245 mp->m_logname = match_strdup(args);
250 xfs_warn(mp, "%s option not allowed on this system", p);
253 mp->m_rtname = match_strdup(args);
259 if (suffix_kstrtoint(args, 10, &iosize))
261 iosizelog = ffs(iosize) - 1;
265 mp->m_flags |= XFS_MOUNT_GRPID;
269 mp->m_flags &= ~XFS_MOUNT_GRPID;
272 mp->m_flags |= XFS_MOUNT_WSYNC;
275 mp->m_flags |= XFS_MOUNT_NORECOVERY;
278 mp->m_flags |= XFS_MOUNT_NOALIGN;
281 mp->m_flags |= XFS_MOUNT_SWALLOC;
284 if (match_int(args, &dsunit))
288 if (match_int(args, &dswidth))
292 mp->m_flags |= XFS_MOUNT_SMALL_INUMS;
295 mp->m_flags &= ~XFS_MOUNT_SMALL_INUMS;
298 mp->m_flags |= XFS_MOUNT_NOUUID;
301 mp->m_flags |= XFS_MOUNT_BARRIER;
304 mp->m_flags &= ~XFS_MOUNT_BARRIER;
307 mp->m_flags |= XFS_MOUNT_IKEEP;
310 mp->m_flags &= ~XFS_MOUNT_IKEEP;
313 mp->m_flags &= ~XFS_MOUNT_COMPAT_IOSIZE;
316 mp->m_flags |= XFS_MOUNT_COMPAT_IOSIZE;
319 mp->m_flags |= XFS_MOUNT_ATTR2;
322 mp->m_flags &= ~XFS_MOUNT_ATTR2;
323 mp->m_flags |= XFS_MOUNT_NOATTR2;
325 case Opt_filestreams:
326 mp->m_flags |= XFS_MOUNT_FILESTREAMS;
329 mp->m_qflags &= ~XFS_ALL_QUOTA_ACCT;
330 mp->m_qflags &= ~XFS_ALL_QUOTA_ENFD;
331 mp->m_qflags &= ~XFS_ALL_QUOTA_ACTIVE;
336 mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE |
340 case Opt_uqnoenforce:
341 mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE);
342 mp->m_qflags &= ~XFS_UQUOTA_ENFD;
346 mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE |
349 case Opt_pqnoenforce:
350 mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE);
351 mp->m_qflags &= ~XFS_PQUOTA_ENFD;
355 mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE |
358 case Opt_gqnoenforce:
359 mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE);
360 mp->m_qflags &= ~XFS_GQUOTA_ENFD;
363 mp->m_flags |= XFS_MOUNT_DISCARD;
366 mp->m_flags &= ~XFS_MOUNT_DISCARD;
370 mp->m_flags |= XFS_MOUNT_DAX;
374 xfs_warn(mp, "unknown mount option [%s].", p);
380 * no recovery flag requires a read-only mount
382 if ((mp->m_flags & XFS_MOUNT_NORECOVERY) &&
383 !(mp->m_flags & XFS_MOUNT_RDONLY)) {
384 xfs_warn(mp, "no-recovery mounts must be read-only.");
388 if ((mp->m_flags & XFS_MOUNT_NOALIGN) && (dsunit || dswidth)) {
390 "sunit and swidth options incompatible with the noalign option");
394 #ifndef CONFIG_XFS_QUOTA
395 if (XFS_IS_QUOTA_RUNNING(mp)) {
396 xfs_warn(mp, "quota support not available in this kernel.");
401 if ((dsunit && !dswidth) || (!dsunit && dswidth)) {
402 xfs_warn(mp, "sunit and swidth must be specified together");
406 if (dsunit && (dswidth % dsunit != 0)) {
408 "stripe width (%d) must be a multiple of the stripe unit (%d)",
414 if (dsunit && !(mp->m_flags & XFS_MOUNT_NOALIGN)) {
416 * At this point the superblock has not been read
417 * in, therefore we do not know the block size.
418 * Before the mount call ends we will convert
421 mp->m_dalign = dsunit;
422 mp->m_swidth = dswidth;
425 if (mp->m_logbufs != -1 &&
426 mp->m_logbufs != 0 &&
427 (mp->m_logbufs < XLOG_MIN_ICLOGS ||
428 mp->m_logbufs > XLOG_MAX_ICLOGS)) {
429 xfs_warn(mp, "invalid logbufs value: %d [not %d-%d]",
430 mp->m_logbufs, XLOG_MIN_ICLOGS, XLOG_MAX_ICLOGS);
433 if (mp->m_logbsize != -1 &&
434 mp->m_logbsize != 0 &&
435 (mp->m_logbsize < XLOG_MIN_RECORD_BSIZE ||
436 mp->m_logbsize > XLOG_MAX_RECORD_BSIZE ||
437 !is_power_of_2(mp->m_logbsize))) {
439 "invalid logbufsize: %d [not 16k,32k,64k,128k or 256k]",
445 if (iosizelog > XFS_MAX_IO_LOG ||
446 iosizelog < XFS_MIN_IO_LOG) {
447 xfs_warn(mp, "invalid log iosize: %d [not %d-%d]",
448 iosizelog, XFS_MIN_IO_LOG,
453 mp->m_flags |= XFS_MOUNT_DFLT_IOSIZE;
454 mp->m_readio_log = iosizelog;
455 mp->m_writeio_log = iosizelog;
461 struct proc_xfs_info {
468 struct xfs_mount *mp,
471 static struct proc_xfs_info xfs_info_set[] = {
472 /* the few simple ones we can get from the mount struct */
473 { XFS_MOUNT_IKEEP, ",ikeep" },
474 { XFS_MOUNT_WSYNC, ",wsync" },
475 { XFS_MOUNT_NOALIGN, ",noalign" },
476 { XFS_MOUNT_SWALLOC, ",swalloc" },
477 { XFS_MOUNT_NOUUID, ",nouuid" },
478 { XFS_MOUNT_NORECOVERY, ",norecovery" },
479 { XFS_MOUNT_ATTR2, ",attr2" },
480 { XFS_MOUNT_FILESTREAMS, ",filestreams" },
481 { XFS_MOUNT_GRPID, ",grpid" },
482 { XFS_MOUNT_DISCARD, ",discard" },
483 { XFS_MOUNT_SMALL_INUMS, ",inode32" },
484 { XFS_MOUNT_DAX, ",dax" },
487 static struct proc_xfs_info xfs_info_unset[] = {
488 /* the few simple ones we can get from the mount struct */
489 { XFS_MOUNT_COMPAT_IOSIZE, ",largeio" },
490 { XFS_MOUNT_BARRIER, ",nobarrier" },
491 { XFS_MOUNT_SMALL_INUMS, ",inode64" },
494 struct proc_xfs_info *xfs_infop;
496 for (xfs_infop = xfs_info_set; xfs_infop->flag; xfs_infop++) {
497 if (mp->m_flags & xfs_infop->flag)
498 seq_puts(m, xfs_infop->str);
500 for (xfs_infop = xfs_info_unset; xfs_infop->flag; xfs_infop++) {
501 if (!(mp->m_flags & xfs_infop->flag))
502 seq_puts(m, xfs_infop->str);
505 if (mp->m_flags & XFS_MOUNT_DFLT_IOSIZE)
506 seq_printf(m, ",allocsize=%dk",
507 (int)(1 << mp->m_writeio_log) >> 10);
509 if (mp->m_logbufs > 0)
510 seq_printf(m, ",logbufs=%d", mp->m_logbufs);
511 if (mp->m_logbsize > 0)
512 seq_printf(m, ",logbsize=%dk", mp->m_logbsize >> 10);
515 seq_show_option(m, "logdev", mp->m_logname);
517 seq_show_option(m, "rtdev", mp->m_rtname);
519 if (mp->m_dalign > 0)
520 seq_printf(m, ",sunit=%d",
521 (int)XFS_FSB_TO_BB(mp, mp->m_dalign));
522 if (mp->m_swidth > 0)
523 seq_printf(m, ",swidth=%d",
524 (int)XFS_FSB_TO_BB(mp, mp->m_swidth));
526 if (mp->m_qflags & (XFS_UQUOTA_ACCT|XFS_UQUOTA_ENFD))
527 seq_puts(m, ",usrquota");
528 else if (mp->m_qflags & XFS_UQUOTA_ACCT)
529 seq_puts(m, ",uqnoenforce");
531 if (mp->m_qflags & XFS_PQUOTA_ACCT) {
532 if (mp->m_qflags & XFS_PQUOTA_ENFD)
533 seq_puts(m, ",prjquota");
535 seq_puts(m, ",pqnoenforce");
537 if (mp->m_qflags & XFS_GQUOTA_ACCT) {
538 if (mp->m_qflags & XFS_GQUOTA_ENFD)
539 seq_puts(m, ",grpquota");
541 seq_puts(m, ",gqnoenforce");
544 if (!(mp->m_qflags & XFS_ALL_QUOTA_ACCT))
545 seq_puts(m, ",noquota");
551 unsigned int blockshift)
553 unsigned int pagefactor = 1;
554 unsigned int bitshift = BITS_PER_LONG - 1;
556 /* Figure out maximum filesize, on Linux this can depend on
557 * the filesystem blocksize (on 32 bit platforms).
558 * __block_write_begin does this in an [unsigned] long...
559 * page->index << (PAGE_SHIFT - bbits)
560 * So, for page sized blocks (4K on 32 bit platforms),
561 * this wraps at around 8Tb (hence MAX_LFS_FILESIZE which is
562 * (((u64)PAGE_SIZE << (BITS_PER_LONG-1))-1)
563 * but for smaller blocksizes it is less (bbits = log2 bsize).
564 * Note1: get_block_t takes a long (implicit cast from above)
565 * Note2: The Large Block Device (LBD and HAVE_SECTOR_T) patch
566 * can optionally convert the [unsigned] long from above into
567 * an [unsigned] long long.
570 #if BITS_PER_LONG == 32
571 # if defined(CONFIG_LBDAF)
572 ASSERT(sizeof(sector_t) == 8);
573 pagefactor = PAGE_SIZE;
574 bitshift = BITS_PER_LONG;
576 pagefactor = PAGE_SIZE >> (PAGE_SHIFT - blockshift);
580 return (((__uint64_t)pagefactor) << bitshift) - 1;
584 * Set parameters for inode allocation heuristics, taking into account
585 * filesystem size and inode32/inode64 mount options; i.e. specifically
586 * whether or not XFS_MOUNT_SMALL_INUMS is set.
588 * Inode allocation patterns are altered only if inode32 is requested
589 * (XFS_MOUNT_SMALL_INUMS), and the filesystem is sufficiently large.
590 * If altered, XFS_MOUNT_32BITINODES is set as well.
592 * An agcount independent of that in the mount structure is provided
593 * because in the growfs case, mp->m_sb.sb_agcount is not yet updated
594 * to the potentially higher ag count.
596 * Returns the maximum AG index which may contain inodes.
600 struct xfs_mount *mp,
601 xfs_agnumber_t agcount)
603 xfs_agnumber_t index;
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. Used only for inode32.
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 /* Get the last possible inode in the filesystem */
627 agino = XFS_OFFBNO_TO_AGINO(mp, sbp->sb_agblocks - 1, 0);
628 ino = XFS_AGINO_TO_INO(mp, agcount - 1, agino);
631 * If user asked for no more than 32-bit inodes, and the fs is
632 * sufficiently large, set XFS_MOUNT_32BITINODES if we must alter
633 * the allocator to accommodate the request.
635 if ((mp->m_flags & XFS_MOUNT_SMALL_INUMS) && ino > XFS_MAXINUMBER_32)
636 mp->m_flags |= XFS_MOUNT_32BITINODES;
638 mp->m_flags &= ~XFS_MOUNT_32BITINODES;
640 for (index = 0; index < agcount; index++) {
641 struct xfs_perag *pag;
643 ino = XFS_AGINO_TO_INO(mp, index, agino);
645 pag = xfs_perag_get(mp, index);
647 if (mp->m_flags & XFS_MOUNT_32BITINODES) {
648 if (ino > XFS_MAXINUMBER_32) {
649 pag->pagi_inodeok = 0;
650 pag->pagf_metadata = 0;
652 pag->pagi_inodeok = 1;
654 if (index < max_metadata)
655 pag->pagf_metadata = 1;
657 pag->pagf_metadata = 0;
660 pag->pagi_inodeok = 1;
661 pag->pagf_metadata = 0;
667 return (mp->m_flags & XFS_MOUNT_32BITINODES) ? maxagi : agcount;
674 struct block_device **bdevp)
678 *bdevp = blkdev_get_by_path(name, FMODE_READ|FMODE_WRITE|FMODE_EXCL,
680 if (IS_ERR(*bdevp)) {
681 error = PTR_ERR(*bdevp);
682 xfs_warn(mp, "Invalid device [%s], error=%d", name, error);
690 struct block_device *bdev)
693 blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL);
697 xfs_blkdev_issue_flush(
698 xfs_buftarg_t *buftarg)
700 blkdev_issue_flush(buftarg->bt_bdev, GFP_NOFS, NULL);
705 struct xfs_mount *mp)
707 if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp) {
708 struct block_device *logdev = mp->m_logdev_targp->bt_bdev;
709 xfs_free_buftarg(mp, mp->m_logdev_targp);
710 xfs_blkdev_put(logdev);
712 if (mp->m_rtdev_targp) {
713 struct block_device *rtdev = mp->m_rtdev_targp->bt_bdev;
714 xfs_free_buftarg(mp, mp->m_rtdev_targp);
715 xfs_blkdev_put(rtdev);
717 xfs_free_buftarg(mp, mp->m_ddev_targp);
721 * The file system configurations are:
722 * (1) device (partition) with data and internal log
723 * (2) logical volume with data and log subvolumes.
724 * (3) logical volume with data, log, and realtime subvolumes.
726 * We only have to handle opening the log and realtime volumes here if
727 * they are present. The data subvolume has already been opened by
728 * get_sb_bdev() and is stored in sb->s_bdev.
732 struct xfs_mount *mp)
734 struct block_device *ddev = mp->m_super->s_bdev;
735 struct block_device *logdev = NULL, *rtdev = NULL;
739 * Open real time and log devices - order is important.
742 error = xfs_blkdev_get(mp, mp->m_logname, &logdev);
748 error = xfs_blkdev_get(mp, mp->m_rtname, &rtdev);
750 goto out_close_logdev;
752 if (rtdev == ddev || rtdev == logdev) {
754 "Cannot mount filesystem with identical rtdev and ddev/logdev.");
756 goto out_close_rtdev;
761 * Setup xfs_mount buffer target pointers
764 mp->m_ddev_targp = xfs_alloc_buftarg(mp, ddev);
765 if (!mp->m_ddev_targp)
766 goto out_close_rtdev;
769 mp->m_rtdev_targp = xfs_alloc_buftarg(mp, rtdev);
770 if (!mp->m_rtdev_targp)
771 goto out_free_ddev_targ;
774 if (logdev && logdev != ddev) {
775 mp->m_logdev_targp = xfs_alloc_buftarg(mp, logdev);
776 if (!mp->m_logdev_targp)
777 goto out_free_rtdev_targ;
779 mp->m_logdev_targp = mp->m_ddev_targp;
785 if (mp->m_rtdev_targp)
786 xfs_free_buftarg(mp, mp->m_rtdev_targp);
788 xfs_free_buftarg(mp, mp->m_ddev_targp);
790 xfs_blkdev_put(rtdev);
792 if (logdev && logdev != ddev)
793 xfs_blkdev_put(logdev);
799 * Setup xfs_mount buffer target pointers based on superblock
803 struct xfs_mount *mp)
807 error = xfs_setsize_buftarg(mp->m_ddev_targp, mp->m_sb.sb_sectsize);
811 if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp) {
812 unsigned int log_sector_size = BBSIZE;
814 if (xfs_sb_version_hassector(&mp->m_sb))
815 log_sector_size = mp->m_sb.sb_logsectsize;
816 error = xfs_setsize_buftarg(mp->m_logdev_targp,
821 if (mp->m_rtdev_targp) {
822 error = xfs_setsize_buftarg(mp->m_rtdev_targp,
823 mp->m_sb.sb_sectsize);
832 xfs_init_mount_workqueues(
833 struct xfs_mount *mp)
835 mp->m_buf_workqueue = alloc_workqueue("xfs-buf/%s",
836 WQ_MEM_RECLAIM|WQ_FREEZABLE, 1, mp->m_fsname);
837 if (!mp->m_buf_workqueue)
840 mp->m_data_workqueue = alloc_workqueue("xfs-data/%s",
841 WQ_MEM_RECLAIM|WQ_FREEZABLE, 0, mp->m_fsname);
842 if (!mp->m_data_workqueue)
843 goto out_destroy_buf;
845 mp->m_unwritten_workqueue = alloc_workqueue("xfs-conv/%s",
846 WQ_MEM_RECLAIM|WQ_FREEZABLE, 0, mp->m_fsname);
847 if (!mp->m_unwritten_workqueue)
848 goto out_destroy_data_iodone_queue;
850 mp->m_cil_workqueue = alloc_workqueue("xfs-cil/%s",
851 WQ_MEM_RECLAIM|WQ_FREEZABLE, 0, mp->m_fsname);
852 if (!mp->m_cil_workqueue)
853 goto out_destroy_unwritten;
855 mp->m_reclaim_workqueue = alloc_workqueue("xfs-reclaim/%s",
856 WQ_MEM_RECLAIM|WQ_FREEZABLE, 0, mp->m_fsname);
857 if (!mp->m_reclaim_workqueue)
858 goto out_destroy_cil;
860 mp->m_log_workqueue = alloc_workqueue("xfs-log/%s",
861 WQ_MEM_RECLAIM|WQ_FREEZABLE|WQ_HIGHPRI, 0,
863 if (!mp->m_log_workqueue)
864 goto out_destroy_reclaim;
866 mp->m_eofblocks_workqueue = alloc_workqueue("xfs-eofblocks/%s",
867 WQ_MEM_RECLAIM|WQ_FREEZABLE, 0, mp->m_fsname);
868 if (!mp->m_eofblocks_workqueue)
869 goto out_destroy_log;
874 destroy_workqueue(mp->m_log_workqueue);
876 destroy_workqueue(mp->m_reclaim_workqueue);
878 destroy_workqueue(mp->m_cil_workqueue);
879 out_destroy_unwritten:
880 destroy_workqueue(mp->m_unwritten_workqueue);
881 out_destroy_data_iodone_queue:
882 destroy_workqueue(mp->m_data_workqueue);
884 destroy_workqueue(mp->m_buf_workqueue);
890 xfs_destroy_mount_workqueues(
891 struct xfs_mount *mp)
893 destroy_workqueue(mp->m_eofblocks_workqueue);
894 destroy_workqueue(mp->m_log_workqueue);
895 destroy_workqueue(mp->m_reclaim_workqueue);
896 destroy_workqueue(mp->m_cil_workqueue);
897 destroy_workqueue(mp->m_data_workqueue);
898 destroy_workqueue(mp->m_unwritten_workqueue);
899 destroy_workqueue(mp->m_buf_workqueue);
903 * Flush all dirty data to disk. Must not be called while holding an XFS_ILOCK
904 * or a page lock. We use sync_inodes_sb() here to ensure we block while waiting
905 * for IO to complete so that we effectively throttle multiple callers to the
906 * rate at which IO is completing.
910 struct xfs_mount *mp)
912 struct super_block *sb = mp->m_super;
914 if (down_read_trylock(&sb->s_umount)) {
916 up_read(&sb->s_umount);
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 inactivate and reclaim the inode.
934 xfs_fs_destroy_inode(
937 struct xfs_inode *ip = XFS_I(inode);
939 trace_xfs_destroy_inode(ip);
941 ASSERT(!rwsem_is_locked(&ip->i_iolock.mr_lock));
942 XFS_STATS_INC(ip->i_mount, vn_rele);
943 XFS_STATS_INC(ip->i_mount, vn_remove);
947 ASSERT(XFS_FORCED_SHUTDOWN(ip->i_mount) || ip->i_delayed_blks == 0);
948 XFS_STATS_INC(ip->i_mount, vn_reclaim);
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_mmaplock, MRLOCK_ALLOW_EQUAL_PRI|MRLOCK_BARRIER,
990 "xfsino", ip->i_ino);
991 mrlock_init(&ip->i_lock, MRLOCK_ALLOW_EQUAL_PRI|MRLOCK_BARRIER,
992 "xfsino", ip->i_ino);
996 * We do an unlocked check for XFS_IDONTCACHE here because we are already
997 * serialised against cache hits here via the inode->i_lock and igrab() in
998 * xfs_iget_cache_hit(). Hence a lookup that might clear this flag will not be
999 * racing with us, and it avoids needing to grab a spinlock here for every inode
1000 * we drop the final reference on.
1004 struct inode *inode)
1006 struct xfs_inode *ip = XFS_I(inode);
1008 return generic_drop_inode(inode) || (ip->i_flags & XFS_IDONTCACHE);
1013 struct xfs_mount *mp)
1015 kfree(mp->m_fsname);
1016 kfree(mp->m_rtname);
1017 kfree(mp->m_logname);
1022 struct super_block *sb,
1025 struct xfs_mount *mp = XFS_M(sb);
1028 * Doing anything during the async pass would be counterproductive.
1033 xfs_log_force(mp, XFS_LOG_SYNC);
1036 * The disk must be active because we're syncing.
1037 * We schedule log work now (now that the disk is
1038 * active) instead of later (when it might not be).
1040 flush_delayed_work(&mp->m_log->l_work);
1048 struct dentry *dentry,
1049 struct kstatfs *statp)
1051 struct xfs_mount *mp = XFS_M(dentry->d_sb);
1052 xfs_sb_t *sbp = &mp->m_sb;
1053 struct xfs_inode *ip = XFS_I(d_inode(dentry));
1054 __uint64_t fakeinos, id;
1057 __uint64_t fdblocks;
1061 statp->f_type = XFS_SB_MAGIC;
1062 statp->f_namelen = MAXNAMELEN - 1;
1064 id = huge_encode_dev(mp->m_ddev_targp->bt_dev);
1065 statp->f_fsid.val[0] = (u32)id;
1066 statp->f_fsid.val[1] = (u32)(id >> 32);
1068 icount = percpu_counter_sum(&mp->m_icount);
1069 ifree = percpu_counter_sum(&mp->m_ifree);
1070 fdblocks = percpu_counter_sum(&mp->m_fdblocks);
1072 spin_lock(&mp->m_sb_lock);
1073 statp->f_bsize = sbp->sb_blocksize;
1074 lsize = sbp->sb_logstart ? sbp->sb_logblocks : 0;
1075 statp->f_blocks = sbp->sb_dblocks - lsize;
1076 spin_unlock(&mp->m_sb_lock);
1078 statp->f_bfree = fdblocks - XFS_ALLOC_SET_ASIDE(mp);
1079 statp->f_bavail = statp->f_bfree;
1081 fakeinos = statp->f_bfree << sbp->sb_inopblog;
1082 statp->f_files = MIN(icount + fakeinos, (__uint64_t)XFS_MAXINUMBER);
1083 if (mp->m_maxicount)
1084 statp->f_files = min_t(typeof(statp->f_files),
1088 /* If sb_icount overshot maxicount, report actual allocation */
1089 statp->f_files = max_t(typeof(statp->f_files),
1093 /* make sure statp->f_ffree does not underflow */
1094 ffree = statp->f_files - (icount - ifree);
1095 statp->f_ffree = max_t(__int64_t, ffree, 0);
1098 if ((ip->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) &&
1099 ((mp->m_qflags & (XFS_PQUOTA_ACCT|XFS_PQUOTA_ENFD))) ==
1100 (XFS_PQUOTA_ACCT|XFS_PQUOTA_ENFD))
1101 xfs_qm_statvfs(ip, statp);
1106 xfs_save_resvblks(struct xfs_mount *mp)
1108 __uint64_t resblks = 0;
1110 mp->m_resblks_save = mp->m_resblks;
1111 xfs_reserve_blocks(mp, &resblks, NULL);
1115 xfs_restore_resvblks(struct xfs_mount *mp)
1119 if (mp->m_resblks_save) {
1120 resblks = mp->m_resblks_save;
1121 mp->m_resblks_save = 0;
1123 resblks = xfs_default_resblks(mp);
1125 xfs_reserve_blocks(mp, &resblks, NULL);
1129 * Trigger writeback of all the dirty metadata in the file system.
1131 * This ensures that the metadata is written to their location on disk rather
1132 * than just existing in transactions in the log. This means after a quiesce
1133 * there is no log replay required to write the inodes to disk - this is the
1134 * primary difference between a sync and a quiesce.
1136 * Note: xfs_log_quiesce() stops background log work - the callers must ensure
1137 * it is started again when appropriate.
1141 struct xfs_mount *mp)
1145 /* wait for all modifications to complete */
1146 while (atomic_read(&mp->m_active_trans) > 0)
1149 /* force the log to unpin objects from the now complete transactions */
1150 xfs_log_force(mp, XFS_LOG_SYNC);
1152 /* reclaim inodes to do any IO before the freeze completes */
1153 xfs_reclaim_inodes(mp, 0);
1154 xfs_reclaim_inodes(mp, SYNC_WAIT);
1156 /* Push the superblock and write an unmount record */
1157 error = xfs_log_sbcount(mp);
1159 xfs_warn(mp, "xfs_attr_quiesce: failed to log sb changes. "
1160 "Frozen image may not be consistent.");
1162 * Just warn here till VFS can correctly support
1163 * read-only remount without racing.
1165 WARN_ON(atomic_read(&mp->m_active_trans) != 0);
1167 xfs_log_quiesce(mp);
1171 xfs_test_remount_options(
1172 struct super_block *sb,
1173 struct xfs_mount *mp,
1177 struct xfs_mount *tmp_mp;
1179 tmp_mp = kmem_zalloc(sizeof(*tmp_mp), KM_MAYFAIL);
1183 tmp_mp->m_super = sb;
1184 error = xfs_parseargs(tmp_mp, options);
1185 xfs_free_fsname(tmp_mp);
1193 struct super_block *sb,
1197 struct xfs_mount *mp = XFS_M(sb);
1198 xfs_sb_t *sbp = &mp->m_sb;
1199 substring_t args[MAX_OPT_ARGS];
1203 /* First, check for complete junk; i.e. invalid options */
1204 error = xfs_test_remount_options(sb, mp, options);
1208 sync_filesystem(sb);
1209 while ((p = strsep(&options, ",")) != NULL) {
1215 token = match_token(p, tokens, args);
1218 mp->m_flags |= XFS_MOUNT_BARRIER;
1221 mp->m_flags &= ~XFS_MOUNT_BARRIER;
1224 mp->m_flags &= ~XFS_MOUNT_SMALL_INUMS;
1225 mp->m_maxagi = xfs_set_inode_alloc(mp, sbp->sb_agcount);
1228 mp->m_flags |= XFS_MOUNT_SMALL_INUMS;
1229 mp->m_maxagi = xfs_set_inode_alloc(mp, sbp->sb_agcount);
1233 * Logically we would return an error here to prevent
1234 * users from believing they might have changed
1235 * mount options using remount which can't be changed.
1237 * But unfortunately mount(8) adds all options from
1238 * mtab and fstab to the mount arguments in some cases
1239 * so we can't blindly reject options, but have to
1240 * check for each specified option if it actually
1241 * differs from the currently set option and only
1242 * reject it if that's the case.
1244 * Until that is implemented we return success for
1245 * every remount request, and silently ignore all
1246 * options that we can't actually change.
1250 "mount option \"%s\" not supported for remount", p);
1259 if ((mp->m_flags & XFS_MOUNT_RDONLY) && !(*flags & MS_RDONLY)) {
1260 if (mp->m_flags & XFS_MOUNT_NORECOVERY) {
1262 "ro->rw transition prohibited on norecovery mount");
1266 if (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5 &&
1267 xfs_sb_has_ro_compat_feature(sbp,
1268 XFS_SB_FEAT_RO_COMPAT_UNKNOWN)) {
1270 "ro->rw transition prohibited on unknown (0x%x) ro-compat filesystem",
1271 (sbp->sb_features_ro_compat &
1272 XFS_SB_FEAT_RO_COMPAT_UNKNOWN));
1276 mp->m_flags &= ~XFS_MOUNT_RDONLY;
1279 * If this is the first remount to writeable state we
1280 * might have some superblock changes to update.
1282 if (mp->m_update_sb) {
1283 error = xfs_sync_sb(mp, false);
1285 xfs_warn(mp, "failed to write sb changes");
1288 mp->m_update_sb = false;
1292 * Fill out the reserve pool if it is empty. Use the stashed
1293 * value if it is non-zero, otherwise go with the default.
1295 xfs_restore_resvblks(mp);
1296 xfs_log_work_queue(mp);
1297 xfs_queue_eofblocks(mp);
1301 if (!(mp->m_flags & XFS_MOUNT_RDONLY) && (*flags & MS_RDONLY)) {
1303 * Before we sync the metadata, we need to free up the reserve
1304 * block pool so that the used block count in the superblock on
1305 * disk is correct at the end of the remount. Stash the current
1306 * reserve pool size so that if we get remounted rw, we can
1307 * return it to the same size.
1309 xfs_save_resvblks(mp);
1312 * Cancel background eofb scanning so it cannot race with the
1313 * final log force+buftarg wait and deadlock the remount.
1315 cancel_delayed_work_sync(&mp->m_eofblocks_work);
1317 xfs_quiesce_attr(mp);
1318 mp->m_flags |= XFS_MOUNT_RDONLY;
1325 * Second stage of a freeze. The data is already frozen so we only
1326 * need to take care of the metadata. Once that's done sync the superblock
1327 * to the log to dirty it in case of a crash while frozen. This ensures that we
1328 * will recover the unlinked inode lists on the next mount.
1332 struct super_block *sb)
1334 struct xfs_mount *mp = XFS_M(sb);
1336 xfs_save_resvblks(mp);
1337 xfs_quiesce_attr(mp);
1338 return xfs_sync_sb(mp, true);
1343 struct super_block *sb)
1345 struct xfs_mount *mp = XFS_M(sb);
1347 xfs_restore_resvblks(mp);
1348 xfs_log_work_queue(mp);
1353 xfs_fs_show_options(
1355 struct dentry *root)
1357 return xfs_showargs(XFS_M(root->d_sb), m);
1361 * This function fills in xfs_mount_t fields based on mount args.
1362 * Note: the superblock _has_ now been read in.
1366 struct xfs_mount *mp)
1368 int ronly = (mp->m_flags & XFS_MOUNT_RDONLY);
1370 /* Fail a mount where the logbuf is smaller than the log stripe */
1371 if (xfs_sb_version_haslogv2(&mp->m_sb)) {
1372 if (mp->m_logbsize <= 0 &&
1373 mp->m_sb.sb_logsunit > XLOG_BIG_RECORD_BSIZE) {
1374 mp->m_logbsize = mp->m_sb.sb_logsunit;
1375 } else if (mp->m_logbsize > 0 &&
1376 mp->m_logbsize < mp->m_sb.sb_logsunit) {
1378 "logbuf size must be greater than or equal to log stripe size");
1382 /* Fail a mount if the logbuf is larger than 32K */
1383 if (mp->m_logbsize > XLOG_BIG_RECORD_BSIZE) {
1385 "logbuf size for version 1 logs must be 16K or 32K");
1391 * V5 filesystems always use attr2 format for attributes.
1393 if (xfs_sb_version_hascrc(&mp->m_sb) &&
1394 (mp->m_flags & XFS_MOUNT_NOATTR2)) {
1395 xfs_warn(mp, "Cannot mount a V5 filesystem as noattr2. "
1396 "attr2 is always enabled for V5 filesystems.");
1401 * mkfs'ed attr2 will turn on attr2 mount unless explicitly
1402 * told by noattr2 to turn it off
1404 if (xfs_sb_version_hasattr2(&mp->m_sb) &&
1405 !(mp->m_flags & XFS_MOUNT_NOATTR2))
1406 mp->m_flags |= XFS_MOUNT_ATTR2;
1409 * prohibit r/w mounts of read-only filesystems
1411 if ((mp->m_sb.sb_flags & XFS_SBF_READONLY) && !ronly) {
1413 "cannot mount a read-only filesystem as read-write");
1417 if ((mp->m_qflags & (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE)) &&
1418 (mp->m_qflags & (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE)) &&
1419 !xfs_sb_version_has_pquotino(&mp->m_sb)) {
1421 "Super block does not support project and group quota together");
1429 xfs_init_percpu_counters(
1430 struct xfs_mount *mp)
1434 error = percpu_counter_init(&mp->m_icount, 0, GFP_KERNEL);
1438 error = percpu_counter_init(&mp->m_ifree, 0, GFP_KERNEL);
1442 error = percpu_counter_init(&mp->m_fdblocks, 0, GFP_KERNEL);
1449 percpu_counter_destroy(&mp->m_ifree);
1451 percpu_counter_destroy(&mp->m_icount);
1456 xfs_reinit_percpu_counters(
1457 struct xfs_mount *mp)
1459 percpu_counter_set(&mp->m_icount, mp->m_sb.sb_icount);
1460 percpu_counter_set(&mp->m_ifree, mp->m_sb.sb_ifree);
1461 percpu_counter_set(&mp->m_fdblocks, mp->m_sb.sb_fdblocks);
1465 xfs_destroy_percpu_counters(
1466 struct xfs_mount *mp)
1468 percpu_counter_destroy(&mp->m_icount);
1469 percpu_counter_destroy(&mp->m_ifree);
1470 percpu_counter_destroy(&mp->m_fdblocks);
1475 struct super_block *sb,
1480 struct xfs_mount *mp = NULL;
1481 int flags = 0, error = -ENOMEM;
1483 mp = kzalloc(sizeof(struct xfs_mount), GFP_KERNEL);
1487 spin_lock_init(&mp->m_sb_lock);
1488 mutex_init(&mp->m_growlock);
1489 atomic_set(&mp->m_active_trans, 0);
1490 INIT_DELAYED_WORK(&mp->m_reclaim_work, xfs_reclaim_worker);
1491 INIT_DELAYED_WORK(&mp->m_eofblocks_work, xfs_eofblocks_worker);
1492 mp->m_kobj.kobject.kset = xfs_kset;
1497 error = xfs_parseargs(mp, (char *)data);
1499 goto out_free_fsname;
1501 sb_min_blocksize(sb, BBSIZE);
1502 sb->s_xattr = xfs_xattr_handlers;
1503 sb->s_export_op = &xfs_export_operations;
1504 #ifdef CONFIG_XFS_QUOTA
1505 sb->s_qcop = &xfs_quotactl_operations;
1506 sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP | QTYPE_MASK_PRJ;
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_init_mount_workqueues(mp);
1519 goto out_close_devices;
1521 error = xfs_init_percpu_counters(mp);
1523 goto out_destroy_workqueues;
1525 /* Allocate stats memory before we do operations that might use it */
1526 mp->m_stats.xs_stats = alloc_percpu(struct xfsstats);
1527 if (!mp->m_stats.xs_stats) {
1529 goto out_destroy_counters;
1532 error = xfs_readsb(mp, flags);
1534 goto out_free_stats;
1536 error = xfs_finish_flags(mp);
1540 error = xfs_setup_devices(mp);
1544 error = xfs_filestream_mount(mp);
1549 * we must configure the block size in the superblock before we run the
1550 * full mount process as the mount process can lookup and cache inodes.
1552 sb->s_magic = XFS_SB_MAGIC;
1553 sb->s_blocksize = mp->m_sb.sb_blocksize;
1554 sb->s_blocksize_bits = ffs(sb->s_blocksize) - 1;
1555 sb->s_maxbytes = xfs_max_file_offset(sb->s_blocksize_bits);
1556 sb->s_max_links = XFS_MAXLINK;
1557 sb->s_time_gran = 1;
1558 set_posix_acl_flag(sb);
1560 /* version 5 superblocks support inode version counters. */
1561 if (XFS_SB_VERSION_NUM(&mp->m_sb) == XFS_SB_VERSION_5)
1562 sb->s_flags |= MS_I_VERSION;
1564 if (mp->m_flags & XFS_MOUNT_DAX) {
1566 "DAX enabled. Warning: EXPERIMENTAL, use at your own risk");
1568 error = bdev_dax_supported(sb, sb->s_blocksize);
1571 "DAX unsupported by block device. Turning off DAX.");
1572 mp->m_flags &= ~XFS_MOUNT_DAX;
1576 error = xfs_mountfs(mp);
1578 goto out_filestream_unmount;
1580 root = igrab(VFS_I(mp->m_rootip));
1585 sb->s_root = d_make_root(root);
1593 out_filestream_unmount:
1594 xfs_filestream_unmount(mp);
1598 free_percpu(mp->m_stats.xs_stats);
1599 out_destroy_counters:
1600 xfs_destroy_percpu_counters(mp);
1601 out_destroy_workqueues:
1602 xfs_destroy_mount_workqueues(mp);
1604 xfs_close_devices(mp);
1606 xfs_free_fsname(mp);
1612 xfs_filestream_unmount(mp);
1619 struct super_block *sb)
1621 struct xfs_mount *mp = XFS_M(sb);
1623 xfs_notice(mp, "Unmounting Filesystem");
1624 xfs_filestream_unmount(mp);
1628 free_percpu(mp->m_stats.xs_stats);
1629 xfs_destroy_percpu_counters(mp);
1630 xfs_destroy_mount_workqueues(mp);
1631 xfs_close_devices(mp);
1632 xfs_free_fsname(mp);
1636 STATIC struct dentry *
1638 struct file_system_type *fs_type,
1640 const char *dev_name,
1643 return mount_bdev(fs_type, flags, dev_name, data, xfs_fs_fill_super);
1647 xfs_fs_nr_cached_objects(
1648 struct super_block *sb,
1649 struct shrink_control *sc)
1651 return xfs_reclaim_inodes_count(XFS_M(sb));
1655 xfs_fs_free_cached_objects(
1656 struct super_block *sb,
1657 struct shrink_control *sc)
1659 return xfs_reclaim_inodes_nr(XFS_M(sb), sc->nr_to_scan);
1662 static const struct super_operations xfs_super_operations = {
1663 .alloc_inode = xfs_fs_alloc_inode,
1664 .destroy_inode = xfs_fs_destroy_inode,
1665 .drop_inode = xfs_fs_drop_inode,
1666 .put_super = xfs_fs_put_super,
1667 .sync_fs = xfs_fs_sync_fs,
1668 .freeze_fs = xfs_fs_freeze,
1669 .unfreeze_fs = xfs_fs_unfreeze,
1670 .statfs = xfs_fs_statfs,
1671 .remount_fs = xfs_fs_remount,
1672 .show_options = xfs_fs_show_options,
1673 .nr_cached_objects = xfs_fs_nr_cached_objects,
1674 .free_cached_objects = xfs_fs_free_cached_objects,
1677 static struct file_system_type xfs_fs_type = {
1678 .owner = THIS_MODULE,
1680 .mount = xfs_fs_mount,
1681 .kill_sb = kill_block_super,
1682 .fs_flags = FS_REQUIRES_DEV,
1684 MODULE_ALIAS_FS("xfs");
1687 xfs_init_zones(void)
1689 xfs_ioend_bioset = bioset_create(4 * MAX_BUF_PER_PAGE,
1690 offsetof(struct xfs_ioend, io_inline_bio));
1691 if (!xfs_ioend_bioset)
1694 xfs_log_ticket_zone = kmem_zone_init(sizeof(xlog_ticket_t),
1696 if (!xfs_log_ticket_zone)
1697 goto out_free_ioend_bioset;
1699 xfs_bmap_free_item_zone = kmem_zone_init(
1700 sizeof(struct xfs_bmap_free_item),
1701 "xfs_bmap_free_item");
1702 if (!xfs_bmap_free_item_zone)
1703 goto out_destroy_log_ticket_zone;
1705 xfs_btree_cur_zone = kmem_zone_init(sizeof(xfs_btree_cur_t),
1707 if (!xfs_btree_cur_zone)
1708 goto out_destroy_bmap_free_item_zone;
1710 xfs_da_state_zone = kmem_zone_init(sizeof(xfs_da_state_t),
1712 if (!xfs_da_state_zone)
1713 goto out_destroy_btree_cur_zone;
1715 xfs_ifork_zone = kmem_zone_init(sizeof(xfs_ifork_t), "xfs_ifork");
1716 if (!xfs_ifork_zone)
1717 goto out_destroy_da_state_zone;
1719 xfs_trans_zone = kmem_zone_init(sizeof(xfs_trans_t), "xfs_trans");
1720 if (!xfs_trans_zone)
1721 goto out_destroy_ifork_zone;
1723 xfs_log_item_desc_zone =
1724 kmem_zone_init(sizeof(struct xfs_log_item_desc),
1725 "xfs_log_item_desc");
1726 if (!xfs_log_item_desc_zone)
1727 goto out_destroy_trans_zone;
1730 * The size of the zone allocated buf log item is the maximum
1731 * size possible under XFS. This wastes a little bit of memory,
1732 * but it is much faster.
1734 xfs_buf_item_zone = kmem_zone_init(sizeof(struct xfs_buf_log_item),
1736 if (!xfs_buf_item_zone)
1737 goto out_destroy_log_item_desc_zone;
1739 xfs_efd_zone = kmem_zone_init((sizeof(xfs_efd_log_item_t) +
1740 ((XFS_EFD_MAX_FAST_EXTENTS - 1) *
1741 sizeof(xfs_extent_t))), "xfs_efd_item");
1743 goto out_destroy_buf_item_zone;
1745 xfs_efi_zone = kmem_zone_init((sizeof(xfs_efi_log_item_t) +
1746 ((XFS_EFI_MAX_FAST_EXTENTS - 1) *
1747 sizeof(xfs_extent_t))), "xfs_efi_item");
1749 goto out_destroy_efd_zone;
1752 kmem_zone_init_flags(sizeof(xfs_inode_t), "xfs_inode",
1753 KM_ZONE_HWALIGN | KM_ZONE_RECLAIM | KM_ZONE_SPREAD |
1754 KM_ZONE_ACCOUNT, xfs_fs_inode_init_once);
1755 if (!xfs_inode_zone)
1756 goto out_destroy_efi_zone;
1759 kmem_zone_init_flags(sizeof(xfs_inode_log_item_t), "xfs_ili",
1760 KM_ZONE_SPREAD, NULL);
1762 goto out_destroy_inode_zone;
1763 xfs_icreate_zone = kmem_zone_init(sizeof(struct xfs_icreate_item),
1765 if (!xfs_icreate_zone)
1766 goto out_destroy_ili_zone;
1770 out_destroy_ili_zone:
1771 kmem_zone_destroy(xfs_ili_zone);
1772 out_destroy_inode_zone:
1773 kmem_zone_destroy(xfs_inode_zone);
1774 out_destroy_efi_zone:
1775 kmem_zone_destroy(xfs_efi_zone);
1776 out_destroy_efd_zone:
1777 kmem_zone_destroy(xfs_efd_zone);
1778 out_destroy_buf_item_zone:
1779 kmem_zone_destroy(xfs_buf_item_zone);
1780 out_destroy_log_item_desc_zone:
1781 kmem_zone_destroy(xfs_log_item_desc_zone);
1782 out_destroy_trans_zone:
1783 kmem_zone_destroy(xfs_trans_zone);
1784 out_destroy_ifork_zone:
1785 kmem_zone_destroy(xfs_ifork_zone);
1786 out_destroy_da_state_zone:
1787 kmem_zone_destroy(xfs_da_state_zone);
1788 out_destroy_btree_cur_zone:
1789 kmem_zone_destroy(xfs_btree_cur_zone);
1790 out_destroy_bmap_free_item_zone:
1791 kmem_zone_destroy(xfs_bmap_free_item_zone);
1792 out_destroy_log_ticket_zone:
1793 kmem_zone_destroy(xfs_log_ticket_zone);
1794 out_free_ioend_bioset:
1795 bioset_free(xfs_ioend_bioset);
1801 xfs_destroy_zones(void)
1804 * Make sure all delayed rcu free are flushed before we
1808 kmem_zone_destroy(xfs_icreate_zone);
1809 kmem_zone_destroy(xfs_ili_zone);
1810 kmem_zone_destroy(xfs_inode_zone);
1811 kmem_zone_destroy(xfs_efi_zone);
1812 kmem_zone_destroy(xfs_efd_zone);
1813 kmem_zone_destroy(xfs_buf_item_zone);
1814 kmem_zone_destroy(xfs_log_item_desc_zone);
1815 kmem_zone_destroy(xfs_trans_zone);
1816 kmem_zone_destroy(xfs_ifork_zone);
1817 kmem_zone_destroy(xfs_da_state_zone);
1818 kmem_zone_destroy(xfs_btree_cur_zone);
1819 kmem_zone_destroy(xfs_bmap_free_item_zone);
1820 kmem_zone_destroy(xfs_log_ticket_zone);
1821 bioset_free(xfs_ioend_bioset);
1825 xfs_init_workqueues(void)
1828 * The allocation workqueue can be used in memory reclaim situations
1829 * (writepage path), and parallelism is only limited by the number of
1830 * AGs in all the filesystems mounted. Hence use the default large
1831 * max_active value for this workqueue.
1833 xfs_alloc_wq = alloc_workqueue("xfsalloc",
1834 WQ_MEM_RECLAIM|WQ_FREEZABLE, 0);
1842 xfs_destroy_workqueues(void)
1844 destroy_workqueue(xfs_alloc_wq);
1852 xfs_check_ondisk_structs();
1854 printk(KERN_INFO XFS_VERSION_STRING " with "
1855 XFS_BUILD_OPTIONS " enabled\n");
1859 error = xfs_init_zones();
1863 error = xfs_init_workqueues();
1865 goto out_destroy_zones;
1867 error = xfs_mru_cache_init();
1869 goto out_destroy_wq;
1871 error = xfs_buf_init();
1873 goto out_mru_cache_uninit;
1875 error = xfs_init_procfs();
1877 goto out_buf_terminate;
1879 error = xfs_sysctl_register();
1881 goto out_cleanup_procfs;
1883 xfs_kset = kset_create_and_add("xfs", NULL, fs_kobj);
1886 goto out_sysctl_unregister;
1889 xfsstats.xs_kobj.kobject.kset = xfs_kset;
1891 xfsstats.xs_stats = alloc_percpu(struct xfsstats);
1892 if (!xfsstats.xs_stats) {
1894 goto out_kset_unregister;
1897 error = xfs_sysfs_init(&xfsstats.xs_kobj, &xfs_stats_ktype, NULL,
1900 goto out_free_stats;
1903 xfs_dbg_kobj.kobject.kset = xfs_kset;
1904 error = xfs_sysfs_init(&xfs_dbg_kobj, &xfs_dbg_ktype, NULL, "debug");
1906 goto out_remove_stats_kobj;
1909 error = xfs_qm_init();
1911 goto out_remove_dbg_kobj;
1913 error = register_filesystem(&xfs_fs_type);
1920 out_remove_dbg_kobj:
1922 xfs_sysfs_del(&xfs_dbg_kobj);
1923 out_remove_stats_kobj:
1925 xfs_sysfs_del(&xfsstats.xs_kobj);
1927 free_percpu(xfsstats.xs_stats);
1928 out_kset_unregister:
1929 kset_unregister(xfs_kset);
1930 out_sysctl_unregister:
1931 xfs_sysctl_unregister();
1933 xfs_cleanup_procfs();
1935 xfs_buf_terminate();
1936 out_mru_cache_uninit:
1937 xfs_mru_cache_uninit();
1939 xfs_destroy_workqueues();
1941 xfs_destroy_zones();
1950 unregister_filesystem(&xfs_fs_type);
1952 xfs_sysfs_del(&xfs_dbg_kobj);
1954 xfs_sysfs_del(&xfsstats.xs_kobj);
1955 free_percpu(xfsstats.xs_stats);
1956 kset_unregister(xfs_kset);
1957 xfs_sysctl_unregister();
1958 xfs_cleanup_procfs();
1959 xfs_buf_terminate();
1960 xfs_mru_cache_uninit();
1961 xfs_destroy_workqueues();
1962 xfs_destroy_zones();
1963 xfs_uuid_table_free();
1966 module_init(init_xfs_fs);
1967 module_exit(exit_xfs_fs);
1969 MODULE_AUTHOR("Silicon Graphics, Inc.");
1970 MODULE_DESCRIPTION(XFS_VERSION_STRING " with " XFS_BUILD_OPTIONS " enabled");
1971 MODULE_LICENSE("GPL");