2 * Copyright (c) 2000-2005 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"
28 #include "xfs_alloc.h"
29 #include "xfs_dmapi.h"
30 #include "xfs_quota.h"
31 #include "xfs_mount.h"
32 #include "xfs_bmap_btree.h"
33 #include "xfs_alloc_btree.h"
34 #include "xfs_ialloc_btree.h"
35 #include "xfs_dir_sf.h"
36 #include "xfs_dir2_sf.h"
37 #include "xfs_attr_sf.h"
38 #include "xfs_dinode.h"
39 #include "xfs_inode.h"
40 #include "xfs_btree.h"
41 #include "xfs_ialloc.h"
43 #include "xfs_rtalloc.h"
44 #include "xfs_error.h"
45 #include "xfs_itable.h"
51 #include "xfs_buf_item.h"
52 #include "xfs_utils.h"
53 #include "xfs_version.h"
55 #include <linux/namei.h>
56 #include <linux/init.h>
57 #include <linux/mount.h>
58 #include <linux/mempool.h>
59 #include <linux/writeback.h>
60 #include <linux/kthread.h>
62 STATIC struct quotactl_ops xfs_quotactl_operations;
63 STATIC struct super_operations xfs_super_operations;
64 STATIC kmem_zone_t *xfs_vnode_zone;
65 STATIC kmem_zone_t *xfs_ioend_zone;
66 mempool_t *xfs_ioend_pool;
68 STATIC struct xfs_mount_args *
70 struct super_block *sb)
72 struct xfs_mount_args *args;
74 args = kmem_zalloc(sizeof(struct xfs_mount_args), KM_SLEEP);
75 args->logbufs = args->logbufsize = -1;
76 strncpy(args->fsname, sb->s_id, MAXNAMELEN);
78 /* Copy the already-parsed mount(2) flags we're interested in */
79 if (sb->s_flags & MS_DIRSYNC)
80 args->flags |= XFSMNT_DIRSYNC;
81 if (sb->s_flags & MS_SYNCHRONOUS)
82 args->flags |= XFSMNT_WSYNC;
84 /* Default to 32 bit inodes on Linux all the time */
85 args->flags |= XFSMNT_32BITINODES;
92 unsigned int blockshift)
94 unsigned int pagefactor = 1;
95 unsigned int bitshift = BITS_PER_LONG - 1;
97 /* Figure out maximum filesize, on Linux this can depend on
98 * the filesystem blocksize (on 32 bit platforms).
99 * __block_prepare_write does this in an [unsigned] long...
100 * page->index << (PAGE_CACHE_SHIFT - bbits)
101 * So, for page sized blocks (4K on 32 bit platforms),
102 * this wraps at around 8Tb (hence MAX_LFS_FILESIZE which is
103 * (((u64)PAGE_CACHE_SIZE << (BITS_PER_LONG-1))-1)
104 * but for smaller blocksizes it is less (bbits = log2 bsize).
105 * Note1: get_block_t takes a long (implicit cast from above)
106 * Note2: The Large Block Device (LBD and HAVE_SECTOR_T) patch
107 * can optionally convert the [unsigned] long from above into
108 * an [unsigned] long long.
111 #if BITS_PER_LONG == 32
112 # if defined(CONFIG_LBD)
113 ASSERT(sizeof(sector_t) == 8);
114 pagefactor = PAGE_CACHE_SIZE;
115 bitshift = BITS_PER_LONG;
117 pagefactor = PAGE_CACHE_SIZE >> (PAGE_CACHE_SHIFT - blockshift);
121 return (((__uint64_t)pagefactor) << bitshift) - 1;
124 STATIC __inline__ void
128 switch (inode->i_mode & S_IFMT) {
130 inode->i_op = &xfs_inode_operations;
131 inode->i_fop = &xfs_file_operations;
132 inode->i_mapping->a_ops = &xfs_address_space_operations;
135 inode->i_op = &xfs_dir_inode_operations;
136 inode->i_fop = &xfs_dir_file_operations;
139 inode->i_op = &xfs_symlink_inode_operations;
141 inode->i_mapping->a_ops = &xfs_address_space_operations;
144 inode->i_op = &xfs_inode_operations;
145 init_special_inode(inode, inode->i_mode, inode->i_rdev);
150 STATIC __inline__ void
151 xfs_revalidate_inode(
156 struct inode *inode = vn_to_inode(vp);
158 inode->i_mode = ip->i_d.di_mode;
159 inode->i_nlink = ip->i_d.di_nlink;
160 inode->i_uid = ip->i_d.di_uid;
161 inode->i_gid = ip->i_d.di_gid;
163 switch (inode->i_mode & S_IFMT) {
167 MKDEV(sysv_major(ip->i_df.if_u2.if_rdev) & 0x1ff,
168 sysv_minor(ip->i_df.if_u2.if_rdev));
175 inode->i_blksize = xfs_preferred_iosize(mp);
176 inode->i_generation = ip->i_d.di_gen;
177 i_size_write(inode, ip->i_d.di_size);
179 XFS_FSB_TO_BB(mp, ip->i_d.di_nblocks + ip->i_delayed_blks);
180 inode->i_atime.tv_sec = ip->i_d.di_atime.t_sec;
181 inode->i_atime.tv_nsec = ip->i_d.di_atime.t_nsec;
182 inode->i_mtime.tv_sec = ip->i_d.di_mtime.t_sec;
183 inode->i_mtime.tv_nsec = ip->i_d.di_mtime.t_nsec;
184 inode->i_ctime.tv_sec = ip->i_d.di_ctime.t_sec;
185 inode->i_ctime.tv_nsec = ip->i_d.di_ctime.t_nsec;
186 if (ip->i_d.di_flags & XFS_DIFLAG_IMMUTABLE)
187 inode->i_flags |= S_IMMUTABLE;
189 inode->i_flags &= ~S_IMMUTABLE;
190 if (ip->i_d.di_flags & XFS_DIFLAG_APPEND)
191 inode->i_flags |= S_APPEND;
193 inode->i_flags &= ~S_APPEND;
194 if (ip->i_d.di_flags & XFS_DIFLAG_SYNC)
195 inode->i_flags |= S_SYNC;
197 inode->i_flags &= ~S_SYNC;
198 if (ip->i_d.di_flags & XFS_DIFLAG_NOATIME)
199 inode->i_flags |= S_NOATIME;
201 inode->i_flags &= ~S_NOATIME;
202 vp->v_flag &= ~VMODIFIED;
206 xfs_initialize_vnode(
209 bhv_desc_t *inode_bhv,
212 xfs_inode_t *ip = XFS_BHVTOI(inode_bhv);
213 struct inode *inode = vn_to_inode(vp);
215 if (!inode_bhv->bd_vobj) {
216 vp->v_vfsp = bhvtovfs(bdp);
217 bhv_desc_init(inode_bhv, ip, vp, &xfs_vnodeops);
218 bhv_insert(VN_BHV_HEAD(vp), inode_bhv);
222 * We need to set the ops vectors, and unlock the inode, but if
223 * we have been called during the new inode create process, it is
224 * too early to fill in the Linux inode. We will get called a
225 * second time once the inode is properly set up, and then we can
228 if (ip->i_d.di_mode != 0 && unlock && (inode->i_state & I_NEW)) {
229 xfs_revalidate_inode(XFS_BHVTOM(bdp), vp, ip);
230 xfs_set_inodeops(inode);
232 ip->i_flags &= ~XFS_INEW;
235 unlock_new_inode(inode);
243 struct block_device **bdevp)
247 *bdevp = open_bdev_excl(name, 0, mp);
248 if (IS_ERR(*bdevp)) {
249 error = PTR_ERR(*bdevp);
250 printk("XFS: Invalid device [%s], error=%d\n", name, error);
258 struct block_device *bdev)
261 close_bdev_excl(bdev);
265 * Try to write out the superblock using barriers.
271 xfs_buf_t *sbp = xfs_getsb(mp, 0);
276 XFS_BUF_UNDELAYWRITE(sbp);
278 XFS_BUF_UNASYNC(sbp);
279 XFS_BUF_ORDERED(sbp);
282 error = xfs_iowait(sbp);
285 * Clear all the flags we set and possible error state in the
286 * buffer. We only did the write to try out whether barriers
287 * worked and shouldn't leave any traces in the superblock
291 XFS_BUF_ERROR(sbp, 0);
292 XFS_BUF_UNORDERED(sbp);
299 xfs_mountfs_check_barriers(xfs_mount_t *mp)
303 if (mp->m_logdev_targp != mp->m_ddev_targp) {
304 xfs_fs_cmn_err(CE_NOTE, mp,
305 "Disabling barriers, not supported with external log device");
306 mp->m_flags &= ~XFS_MOUNT_BARRIER;
310 if (mp->m_ddev_targp->bt_bdev->bd_disk->queue->ordered ==
311 QUEUE_ORDERED_NONE) {
312 xfs_fs_cmn_err(CE_NOTE, mp,
313 "Disabling barriers, not supported by the underlying device");
314 mp->m_flags &= ~XFS_MOUNT_BARRIER;
318 error = xfs_barrier_test(mp);
320 xfs_fs_cmn_err(CE_NOTE, mp,
321 "Disabling barriers, trial barrier write failed");
322 mp->m_flags &= ~XFS_MOUNT_BARRIER;
328 xfs_blkdev_issue_flush(
329 xfs_buftarg_t *buftarg)
331 blkdev_issue_flush(buftarg->bt_bdev, NULL);
334 STATIC struct inode *
336 struct super_block *sb)
340 vp = kmem_zone_alloc(xfs_vnode_zone, KM_SLEEP);
343 return vn_to_inode(vp);
347 xfs_fs_destroy_inode(
350 kmem_zone_free(xfs_vnode_zone, vn_from_inode(inode));
354 xfs_fs_inode_init_once(
359 if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) ==
360 SLAB_CTOR_CONSTRUCTOR)
361 inode_init_once(vn_to_inode((vnode_t *)vnode));
367 xfs_vnode_zone = kmem_zone_init_flags(sizeof(vnode_t), "xfs_vnode_t",
368 KM_ZONE_HWALIGN | KM_ZONE_RECLAIM |
370 xfs_fs_inode_init_once);
374 xfs_ioend_zone = kmem_zone_init(sizeof(xfs_ioend_t), "xfs_ioend");
376 goto out_destroy_vnode_zone;
378 xfs_ioend_pool = mempool_create(4 * MAX_BUF_PER_PAGE,
379 mempool_alloc_slab, mempool_free_slab,
382 goto out_free_ioend_zone;
386 kmem_zone_destroy(xfs_ioend_zone);
387 out_destroy_vnode_zone:
388 kmem_zone_destroy(xfs_vnode_zone);
394 xfs_destroy_zones(void)
396 mempool_destroy(xfs_ioend_pool);
397 kmem_zone_destroy(xfs_vnode_zone);
398 kmem_zone_destroy(xfs_ioend_zone);
402 * Attempt to flush the inode, this will actually fail
403 * if the inode is pinned, but we dirty the inode again
404 * at the point when it is unpinned after a log write,
405 * since this is when the inode itself becomes flushable.
412 vnode_t *vp = vn_from_inode(inode);
413 int error = 0, flags = FLUSH_INODE;
416 vn_trace_entry(vp, __FUNCTION__, (inst_t *)__return_address);
419 VOP_IFLUSH(vp, flags, error);
420 if (error == EAGAIN) {
422 VOP_IFLUSH(vp, flags | FLUSH_LOG, error);
435 vnode_t *vp = vn_from_inode(inode);
438 vn_trace_entry(vp, __FUNCTION__, (inst_t *)__return_address);
440 XFS_STATS_INC(vn_rele);
441 XFS_STATS_INC(vn_remove);
442 XFS_STATS_INC(vn_reclaim);
443 XFS_STATS_DEC(vn_active);
446 * This can happen because xfs_iget_core calls xfs_idestroy if we
447 * find an inode with di_mode == 0 but without IGET_CREATE set.
450 VOP_INACTIVE(vp, NULL, cache);
453 vp->v_flag &= ~VMODIFIED;
457 VOP_RECLAIM(vp, error);
459 panic("vn_purge: cannot reclaim");
462 ASSERT(vp->v_fbhv == NULL);
464 #ifdef XFS_VNODE_TRACE
465 ktrace_free(vp->v_trace);
470 * Enqueue a work item to be picked up by the vfs xfssyncd thread.
471 * Doing this has two advantages:
472 * - It saves on stack space, which is tight in certain situations
473 * - It can be used (with care) as a mechanism to avoid deadlocks.
474 * Flushing while allocating in a full filesystem requires both.
477 xfs_syncd_queue_work(
480 void (*syncer)(vfs_t *, void *))
482 vfs_sync_work_t *work;
484 work = kmem_alloc(sizeof(struct vfs_sync_work), KM_SLEEP);
485 INIT_LIST_HEAD(&work->w_list);
486 work->w_syncer = syncer;
489 spin_lock(&vfs->vfs_sync_lock);
490 list_add_tail(&work->w_list, &vfs->vfs_sync_list);
491 spin_unlock(&vfs->vfs_sync_lock);
492 wake_up_process(vfs->vfs_sync_task);
496 * Flush delayed allocate data, attempting to free up reserved space
497 * from existing allocations. At this point a new allocation attempt
498 * has failed with ENOSPC and we are in the process of scratching our
499 * heads, looking about for more room...
502 xfs_flush_inode_work(
506 filemap_flush(((struct inode *)inode)->i_mapping);
507 iput((struct inode *)inode);
514 struct inode *inode = vn_to_inode(XFS_ITOV(ip));
515 struct vfs *vfs = XFS_MTOVFS(ip->i_mount);
518 xfs_syncd_queue_work(vfs, inode, xfs_flush_inode_work);
519 delay(msecs_to_jiffies(500));
523 * This is the "bigger hammer" version of xfs_flush_inode_work...
524 * (IOW, "If at first you don't succeed, use a Bigger Hammer").
527 xfs_flush_device_work(
531 sync_blockdev(vfs->vfs_super->s_bdev);
532 iput((struct inode *)inode);
539 struct inode *inode = vn_to_inode(XFS_ITOV(ip));
540 struct vfs *vfs = XFS_MTOVFS(ip->i_mount);
543 xfs_syncd_queue_work(vfs, inode, xfs_flush_device_work);
544 delay(msecs_to_jiffies(500));
545 xfs_log_force(ip->i_mount, (xfs_lsn_t)0, XFS_LOG_FORCE|XFS_LOG_SYNC);
548 #define SYNCD_FLAGS (SYNC_FSDATA|SYNC_BDFLUSH|SYNC_ATTR|SYNC_REFCACHE)
556 if (!(vfsp->vfs_flag & VFS_RDONLY))
557 VFS_SYNC(vfsp, SYNCD_FLAGS, NULL, error);
558 vfsp->vfs_sync_seq++;
560 wake_up(&vfsp->vfs_wait_single_sync_task);
568 vfs_t *vfsp = (vfs_t *) arg;
569 struct vfs_sync_work *work, *n;
572 timeleft = xfs_syncd_centisecs * msecs_to_jiffies(10);
574 timeleft = schedule_timeout_interruptible(timeleft);
577 if (kthread_should_stop() && list_empty(&vfsp->vfs_sync_list))
580 spin_lock(&vfsp->vfs_sync_lock);
582 * We can get woken by laptop mode, to do a sync -
583 * that's the (only!) case where the list would be
584 * empty with time remaining.
586 if (!timeleft || list_empty(&vfsp->vfs_sync_list)) {
588 timeleft = xfs_syncd_centisecs *
589 msecs_to_jiffies(10);
590 INIT_LIST_HEAD(&vfsp->vfs_sync_work.w_list);
591 list_add_tail(&vfsp->vfs_sync_work.w_list,
592 &vfsp->vfs_sync_list);
594 list_for_each_entry_safe(work, n, &vfsp->vfs_sync_list, w_list)
595 list_move(&work->w_list, &tmp);
596 spin_unlock(&vfsp->vfs_sync_lock);
598 list_for_each_entry_safe(work, n, &tmp, w_list) {
599 (*work->w_syncer)(vfsp, work->w_data);
600 list_del(&work->w_list);
601 if (work == &vfsp->vfs_sync_work)
603 kmem_free(work, sizeof(struct vfs_sync_work));
614 vfsp->vfs_sync_work.w_syncer = vfs_sync_worker;
615 vfsp->vfs_sync_work.w_vfs = vfsp;
616 vfsp->vfs_sync_task = kthread_run(xfssyncd, vfsp, "xfssyncd");
617 if (IS_ERR(vfsp->vfs_sync_task))
618 return -PTR_ERR(vfsp->vfs_sync_task);
626 kthread_stop(vfsp->vfs_sync_task);
631 struct super_block *sb)
633 vfs_t *vfsp = vfs_from_sb(sb);
636 xfs_fs_stop_syncd(vfsp);
637 VFS_SYNC(vfsp, SYNC_ATTR|SYNC_DELWRI, NULL, error);
639 VFS_UNMOUNT(vfsp, 0, NULL, error);
641 printk("XFS unmount got error %d\n", error);
642 printk("%s: vfsp/0x%p left dangling!\n", __FUNCTION__, vfsp);
646 vfs_deallocate(vfsp);
651 struct super_block *sb)
653 vfs_t *vfsp = vfs_from_sb(sb);
656 if (sb->s_flags & MS_RDONLY) {
657 sb->s_dirt = 0; /* paranoia */
660 /* Push the log and superblock a little */
661 VFS_SYNC(vfsp, SYNC_FSDATA, NULL, error);
667 struct super_block *sb,
670 vfs_t *vfsp = vfs_from_sb(sb);
672 int flags = SYNC_FSDATA;
674 if (unlikely(sb->s_frozen == SB_FREEZE_WRITE))
675 flags = SYNC_QUIESCE;
677 flags = SYNC_FSDATA | (wait ? SYNC_WAIT : 0);
679 VFS_SYNC(vfsp, flags, NULL, error);
682 if (unlikely(laptop_mode)) {
683 int prev_sync_seq = vfsp->vfs_sync_seq;
686 * The disk must be active because we're syncing.
687 * We schedule xfssyncd now (now that the disk is
688 * active) instead of later (when it might not be).
690 wake_up_process(vfsp->vfs_sync_task);
692 * We have to wait for the sync iteration to complete.
693 * If we don't, the disk activity caused by the sync
694 * will come after the sync is completed, and that
695 * triggers another sync from laptop mode.
697 wait_event(vfsp->vfs_wait_single_sync_task,
698 vfsp->vfs_sync_seq != prev_sync_seq);
706 struct super_block *sb,
707 struct kstatfs *statp)
709 vfs_t *vfsp = vfs_from_sb(sb);
712 VFS_STATVFS(vfsp, statp, NULL, error);
718 struct super_block *sb,
722 vfs_t *vfsp = vfs_from_sb(sb);
723 struct xfs_mount_args *args = xfs_args_allocate(sb);
726 VFS_PARSEARGS(vfsp, options, args, 1, error);
728 VFS_MNTUPDATE(vfsp, flags, args, error);
729 kmem_free(args, sizeof(*args));
735 struct super_block *sb)
737 VFS_FREEZE(vfs_from_sb(sb));
743 struct vfsmount *mnt)
745 struct vfs *vfsp = vfs_from_sb(mnt->mnt_sb);
748 VFS_SHOWARGS(vfsp, m, error);
754 struct super_block *sb,
757 struct vfs *vfsp = vfs_from_sb(sb);
760 VFS_QUOTACTL(vfsp, Q_XQUOTASYNC, 0, (caddr_t)NULL, error);
766 struct super_block *sb,
767 struct fs_quota_stat *fqs)
769 struct vfs *vfsp = vfs_from_sb(sb);
772 VFS_QUOTACTL(vfsp, Q_XGETQSTAT, 0, (caddr_t)fqs, error);
778 struct super_block *sb,
782 struct vfs *vfsp = vfs_from_sb(sb);
785 VFS_QUOTACTL(vfsp, op, 0, (caddr_t)&flags, error);
791 struct super_block *sb,
794 struct fs_disk_quota *fdq)
796 struct vfs *vfsp = vfs_from_sb(sb);
799 getmode = (type == USRQUOTA) ? Q_XGETQUOTA :
800 ((type == GRPQUOTA) ? Q_XGETGQUOTA : Q_XGETPQUOTA);
801 VFS_QUOTACTL(vfsp, getmode, id, (caddr_t)fdq, error);
807 struct super_block *sb,
810 struct fs_disk_quota *fdq)
812 struct vfs *vfsp = vfs_from_sb(sb);
815 setmode = (type == USRQUOTA) ? Q_XSETQLIM :
816 ((type == GRPQUOTA) ? Q_XSETGQLIM : Q_XSETPQLIM);
817 VFS_QUOTACTL(vfsp, setmode, id, (caddr_t)fdq, error);
823 struct super_block *sb,
828 struct vfs *vfsp = vfs_allocate(sb);
829 struct xfs_mount_args *args = xfs_args_allocate(sb);
830 struct kstatfs statvfs;
833 bhv_insert_all_vfsops(vfsp);
835 VFS_PARSEARGS(vfsp, (char *)data, args, 0, error);
837 bhv_remove_all_vfsops(vfsp, 1);
841 sb_min_blocksize(sb, BBSIZE);
842 #ifdef CONFIG_XFS_EXPORT
843 sb->s_export_op = &xfs_export_operations;
845 sb->s_qcop = &xfs_quotactl_operations;
846 sb->s_op = &xfs_super_operations;
848 VFS_MOUNT(vfsp, args, NULL, error);
850 bhv_remove_all_vfsops(vfsp, 1);
854 VFS_STATVFS(vfsp, &statvfs, NULL, error);
859 sb->s_magic = statvfs.f_type;
860 sb->s_blocksize = statvfs.f_bsize;
861 sb->s_blocksize_bits = ffs(statvfs.f_bsize) - 1;
862 sb->s_maxbytes = xfs_max_file_offset(sb->s_blocksize_bits);
864 set_posix_acl_flag(sb);
866 VFS_ROOT(vfsp, &rootvp, error);
870 sb->s_root = d_alloc_root(vn_to_inode(rootvp));
875 if (is_bad_inode(sb->s_root->d_inode)) {
879 if ((error = xfs_fs_start_syncd(vfsp)))
881 vn_trace_exit(rootvp, __FUNCTION__, (inst_t *)__return_address);
883 kmem_free(args, sizeof(*args));
895 VFS_UNMOUNT(vfsp, 0, NULL, error2);
898 vfs_deallocate(vfsp);
899 kmem_free(args, sizeof(*args));
903 STATIC struct super_block *
905 struct file_system_type *fs_type,
907 const char *dev_name,
910 return get_sb_bdev(fs_type, flags, dev_name, data, xfs_fs_fill_super);
913 STATIC struct super_operations xfs_super_operations = {
914 .alloc_inode = xfs_fs_alloc_inode,
915 .destroy_inode = xfs_fs_destroy_inode,
916 .write_inode = xfs_fs_write_inode,
917 .clear_inode = xfs_fs_clear_inode,
918 .put_super = xfs_fs_put_super,
919 .write_super = xfs_fs_write_super,
920 .sync_fs = xfs_fs_sync_super,
921 .write_super_lockfs = xfs_fs_lockfs,
922 .statfs = xfs_fs_statfs,
923 .remount_fs = xfs_fs_remount,
924 .show_options = xfs_fs_show_options,
927 STATIC struct quotactl_ops xfs_quotactl_operations = {
928 .quota_sync = xfs_fs_quotasync,
929 .get_xstate = xfs_fs_getxstate,
930 .set_xstate = xfs_fs_setxstate,
931 .get_xquota = xfs_fs_getxquota,
932 .set_xquota = xfs_fs_setxquota,
935 STATIC struct file_system_type xfs_fs_type = {
936 .owner = THIS_MODULE,
938 .get_sb = xfs_fs_get_sb,
939 .kill_sb = kill_block_super,
940 .fs_flags = FS_REQUIRES_DEV,
949 static char message[] __initdata = KERN_INFO \
950 XFS_VERSION_STRING " with " XFS_BUILD_OPTIONS " enabled\n";
955 xfs_physmem = si.totalram;
959 error = xfs_init_zones();
963 error = xfs_buf_init();
972 error = register_filesystem(&xfs_fs_type);
991 unregister_filesystem(&xfs_fs_type);
998 module_init(init_xfs_fs);
999 module_exit(exit_xfs_fs);
1001 MODULE_AUTHOR("Silicon Graphics, Inc.");
1002 MODULE_DESCRIPTION(XFS_VERSION_STRING " with " XFS_BUILD_OPTIONS " enabled");
1003 MODULE_LICENSE("GPL");