2 * Copyright (c) 2000-2006 Silicon Graphics, Inc.
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
7 * published by the Free Software Foundation.
9 * This program is distributed in the hope that it would be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write the Free Software Foundation,
16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
23 #include "xfs_trans.h"
27 #include "xfs_alloc.h"
28 #include "xfs_dmapi.h"
29 #include "xfs_quota.h"
30 #include "xfs_mount.h"
31 #include "xfs_bmap_btree.h"
32 #include "xfs_alloc_btree.h"
33 #include "xfs_ialloc_btree.h"
34 #include "xfs_dir2_sf.h"
35 #include "xfs_attr_sf.h"
36 #include "xfs_dinode.h"
37 #include "xfs_inode.h"
38 #include "xfs_btree.h"
39 #include "xfs_ialloc.h"
41 #include "xfs_rtalloc.h"
42 #include "xfs_error.h"
43 #include "xfs_itable.h"
47 #include "xfs_buf_item.h"
48 #include "xfs_utils.h"
49 #include "xfs_version.h"
51 #include <linux/namei.h>
52 #include <linux/init.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>
59 static struct quotactl_ops xfs_quotactl_operations;
60 static struct super_operations xfs_super_operations;
61 static kmem_zone_t *xfs_vnode_zone;
62 static kmem_zone_t *xfs_ioend_zone;
63 mempool_t *xfs_ioend_pool;
65 STATIC struct xfs_mount_args *
67 struct super_block *sb,
70 struct xfs_mount_args *args;
72 args = kmem_zalloc(sizeof(struct xfs_mount_args), KM_SLEEP);
73 args->logbufs = args->logbufsize = -1;
74 strncpy(args->fsname, sb->s_id, MAXNAMELEN);
76 /* Copy the already-parsed mount(2) flags we're interested in */
77 if (sb->s_flags & MS_DIRSYNC)
78 args->flags |= XFSMNT_DIRSYNC;
79 if (sb->s_flags & MS_SYNCHRONOUS)
80 args->flags |= XFSMNT_WSYNC;
82 args->flags |= XFSMNT_QUIET;
83 args->flags |= XFSMNT_32BITINODES;
90 unsigned int blockshift)
92 unsigned int pagefactor = 1;
93 unsigned int bitshift = BITS_PER_LONG - 1;
95 /* Figure out maximum filesize, on Linux this can depend on
96 * the filesystem blocksize (on 32 bit platforms).
97 * __block_prepare_write does this in an [unsigned] long...
98 * page->index << (PAGE_CACHE_SHIFT - bbits)
99 * So, for page sized blocks (4K on 32 bit platforms),
100 * this wraps at around 8Tb (hence MAX_LFS_FILESIZE which is
101 * (((u64)PAGE_CACHE_SIZE << (BITS_PER_LONG-1))-1)
102 * but for smaller blocksizes it is less (bbits = log2 bsize).
103 * Note1: get_block_t takes a long (implicit cast from above)
104 * Note2: The Large Block Device (LBD and HAVE_SECTOR_T) patch
105 * can optionally convert the [unsigned] long from above into
106 * an [unsigned] long long.
109 #if BITS_PER_LONG == 32
110 # if defined(CONFIG_LBD)
111 ASSERT(sizeof(sector_t) == 8);
112 pagefactor = PAGE_CACHE_SIZE;
113 bitshift = BITS_PER_LONG;
115 pagefactor = PAGE_CACHE_SIZE >> (PAGE_CACHE_SHIFT - blockshift);
119 return (((__uint64_t)pagefactor) << bitshift) - 1;
126 switch (inode->i_mode & S_IFMT) {
128 inode->i_op = &xfs_inode_operations;
129 inode->i_fop = &xfs_file_operations;
130 inode->i_mapping->a_ops = &xfs_address_space_operations;
133 inode->i_op = &xfs_dir_inode_operations;
134 inode->i_fop = &xfs_dir_file_operations;
137 inode->i_op = &xfs_symlink_inode_operations;
139 inode->i_mapping->a_ops = &xfs_address_space_operations;
142 inode->i_op = &xfs_inode_operations;
143 init_special_inode(inode, inode->i_mode, inode->i_rdev);
149 xfs_revalidate_inode(
154 struct inode *inode = vn_to_inode(vp);
156 inode->i_mode = ip->i_d.di_mode;
157 inode->i_nlink = ip->i_d.di_nlink;
158 inode->i_uid = ip->i_d.di_uid;
159 inode->i_gid = ip->i_d.di_gid;
161 switch (inode->i_mode & S_IFMT) {
165 MKDEV(sysv_major(ip->i_df.if_u2.if_rdev) & 0x1ff,
166 sysv_minor(ip->i_df.if_u2.if_rdev));
173 inode->i_generation = ip->i_d.di_gen;
174 i_size_write(inode, ip->i_d.di_size);
176 XFS_FSB_TO_BB(mp, ip->i_d.di_nblocks + ip->i_delayed_blks);
177 inode->i_atime.tv_sec = ip->i_d.di_atime.t_sec;
178 inode->i_atime.tv_nsec = ip->i_d.di_atime.t_nsec;
179 inode->i_mtime.tv_sec = ip->i_d.di_mtime.t_sec;
180 inode->i_mtime.tv_nsec = ip->i_d.di_mtime.t_nsec;
181 inode->i_ctime.tv_sec = ip->i_d.di_ctime.t_sec;
182 inode->i_ctime.tv_nsec = ip->i_d.di_ctime.t_nsec;
183 if (ip->i_d.di_flags & XFS_DIFLAG_IMMUTABLE)
184 inode->i_flags |= S_IMMUTABLE;
186 inode->i_flags &= ~S_IMMUTABLE;
187 if (ip->i_d.di_flags & XFS_DIFLAG_APPEND)
188 inode->i_flags |= S_APPEND;
190 inode->i_flags &= ~S_APPEND;
191 if (ip->i_d.di_flags & XFS_DIFLAG_SYNC)
192 inode->i_flags |= S_SYNC;
194 inode->i_flags &= ~S_SYNC;
195 if (ip->i_d.di_flags & XFS_DIFLAG_NOATIME)
196 inode->i_flags |= S_NOATIME;
198 inode->i_flags &= ~S_NOATIME;
199 vp->v_flag &= ~VMODIFIED;
203 xfs_initialize_vnode(
206 bhv_desc_t *inode_bhv,
209 xfs_inode_t *ip = XFS_BHVTOI(inode_bhv);
210 struct inode *inode = vn_to_inode(vp);
212 if (!inode_bhv->bd_vobj) {
213 vp->v_vfsp = bhvtovfs(bdp);
214 bhv_desc_init(inode_bhv, ip, vp, &xfs_vnodeops);
215 bhv_insert(VN_BHV_HEAD(vp), inode_bhv);
219 * We need to set the ops vectors, and unlock the inode, but if
220 * we have been called during the new inode create process, it is
221 * too early to fill in the Linux inode. We will get called a
222 * second time once the inode is properly set up, and then we can
225 if (ip->i_d.di_mode != 0 && unlock && (inode->i_state & I_NEW)) {
226 xfs_revalidate_inode(XFS_BHVTOM(bdp), vp, ip);
227 xfs_set_inodeops(inode);
229 xfs_iflags_clear(ip, XFS_INEW);
232 unlock_new_inode(inode);
240 struct block_device **bdevp)
244 *bdevp = open_bdev_excl(name, 0, mp);
245 if (IS_ERR(*bdevp)) {
246 error = PTR_ERR(*bdevp);
247 printk("XFS: Invalid device [%s], error=%d\n", name, error);
255 struct block_device *bdev)
258 close_bdev_excl(bdev);
262 * Try to write out the superblock using barriers.
268 xfs_buf_t *sbp = xfs_getsb(mp, 0);
273 XFS_BUF_UNDELAYWRITE(sbp);
275 XFS_BUF_UNASYNC(sbp);
276 XFS_BUF_ORDERED(sbp);
279 error = xfs_iowait(sbp);
282 * Clear all the flags we set and possible error state in the
283 * buffer. We only did the write to try out whether barriers
284 * worked and shouldn't leave any traces in the superblock
288 XFS_BUF_ERROR(sbp, 0);
289 XFS_BUF_UNORDERED(sbp);
296 xfs_mountfs_check_barriers(xfs_mount_t *mp)
300 if (mp->m_logdev_targp != mp->m_ddev_targp) {
301 xfs_fs_cmn_err(CE_NOTE, mp,
302 "Disabling barriers, not supported with external log device");
303 mp->m_flags &= ~XFS_MOUNT_BARRIER;
307 if (mp->m_ddev_targp->bt_bdev->bd_disk->queue->ordered ==
308 QUEUE_ORDERED_NONE) {
309 xfs_fs_cmn_err(CE_NOTE, mp,
310 "Disabling barriers, not supported by the underlying device");
311 mp->m_flags &= ~XFS_MOUNT_BARRIER;
315 if (xfs_readonly_buftarg(mp->m_ddev_targp)) {
316 xfs_fs_cmn_err(CE_NOTE, mp,
317 "Disabling barriers, underlying device is readonly");
318 mp->m_flags &= ~XFS_MOUNT_BARRIER;
322 error = xfs_barrier_test(mp);
324 xfs_fs_cmn_err(CE_NOTE, mp,
325 "Disabling barriers, trial barrier write failed");
326 mp->m_flags &= ~XFS_MOUNT_BARRIER;
332 xfs_blkdev_issue_flush(
333 xfs_buftarg_t *buftarg)
335 blkdev_issue_flush(buftarg->bt_bdev, NULL);
338 STATIC struct inode *
340 struct super_block *sb)
344 vp = kmem_zone_alloc(xfs_vnode_zone, KM_SLEEP);
347 return vn_to_inode(vp);
351 xfs_fs_destroy_inode(
354 kmem_zone_free(xfs_vnode_zone, vn_from_inode(inode));
358 xfs_fs_inode_init_once(
363 if (flags & SLAB_CTOR_CONSTRUCTOR)
364 inode_init_once(vn_to_inode((bhv_vnode_t *)vnode));
370 xfs_vnode_zone = kmem_zone_init_flags(sizeof(bhv_vnode_t), "xfs_vnode",
371 KM_ZONE_HWALIGN | KM_ZONE_RECLAIM |
373 xfs_fs_inode_init_once);
377 xfs_ioend_zone = kmem_zone_init(sizeof(xfs_ioend_t), "xfs_ioend");
379 goto out_destroy_vnode_zone;
381 xfs_ioend_pool = mempool_create_slab_pool(4 * MAX_BUF_PER_PAGE,
384 goto out_free_ioend_zone;
388 kmem_zone_destroy(xfs_ioend_zone);
389 out_destroy_vnode_zone:
390 kmem_zone_destroy(xfs_vnode_zone);
396 xfs_destroy_zones(void)
398 mempool_destroy(xfs_ioend_pool);
399 kmem_zone_destroy(xfs_vnode_zone);
400 kmem_zone_destroy(xfs_ioend_zone);
404 * Attempt to flush the inode, this will actually fail
405 * if the inode is pinned, but we dirty the inode again
406 * at the point when it is unpinned after a log write,
407 * since this is when the inode itself becomes flushable.
414 bhv_vnode_t *vp = vn_from_inode(inode);
415 int error = 0, flags = FLUSH_INODE;
418 vn_trace_entry(vp, __FUNCTION__, (inst_t *)__return_address);
421 error = bhv_vop_iflush(vp, flags);
423 error = sync? bhv_vop_iflush(vp, flags | FLUSH_LOG) : 0;
432 bhv_vnode_t *vp = vn_from_inode(inode);
434 vn_trace_entry(vp, __FUNCTION__, (inst_t *)__return_address);
436 XFS_STATS_INC(vn_rele);
437 XFS_STATS_INC(vn_remove);
438 XFS_STATS_INC(vn_reclaim);
439 XFS_STATS_DEC(vn_active);
442 * This can happen because xfs_iget_core calls xfs_idestroy if we
443 * find an inode with di_mode == 0 but without IGET_CREATE set.
446 bhv_vop_inactive(vp, NULL);
449 vp->v_flag &= ~VMODIFIED;
453 if (bhv_vop_reclaim(vp))
454 panic("%s: cannot reclaim 0x%p\n", __FUNCTION__, vp);
456 ASSERT(VNHEAD(vp) == NULL);
458 #ifdef XFS_VNODE_TRACE
459 ktrace_free(vp->v_trace);
464 * Enqueue a work item to be picked up by the vfs xfssyncd thread.
465 * Doing this has two advantages:
466 * - It saves on stack space, which is tight in certain situations
467 * - It can be used (with care) as a mechanism to avoid deadlocks.
468 * Flushing while allocating in a full filesystem requires both.
471 xfs_syncd_queue_work(
474 void (*syncer)(bhv_vfs_t *, void *))
476 struct bhv_vfs_sync_work *work;
478 work = kmem_alloc(sizeof(struct bhv_vfs_sync_work), KM_SLEEP);
479 INIT_LIST_HEAD(&work->w_list);
480 work->w_syncer = syncer;
483 spin_lock(&vfs->vfs_sync_lock);
484 list_add_tail(&work->w_list, &vfs->vfs_sync_list);
485 spin_unlock(&vfs->vfs_sync_lock);
486 wake_up_process(vfs->vfs_sync_task);
490 * Flush delayed allocate data, attempting to free up reserved space
491 * from existing allocations. At this point a new allocation attempt
492 * has failed with ENOSPC and we are in the process of scratching our
493 * heads, looking about for more room...
496 xfs_flush_inode_work(
500 filemap_flush(((struct inode *)inode)->i_mapping);
501 iput((struct inode *)inode);
508 struct inode *inode = vn_to_inode(XFS_ITOV(ip));
509 struct bhv_vfs *vfs = XFS_MTOVFS(ip->i_mount);
512 xfs_syncd_queue_work(vfs, inode, xfs_flush_inode_work);
513 delay(msecs_to_jiffies(500));
517 * This is the "bigger hammer" version of xfs_flush_inode_work...
518 * (IOW, "If at first you don't succeed, use a Bigger Hammer").
521 xfs_flush_device_work(
525 sync_blockdev(vfs->vfs_super->s_bdev);
526 iput((struct inode *)inode);
533 struct inode *inode = vn_to_inode(XFS_ITOV(ip));
534 struct bhv_vfs *vfs = XFS_MTOVFS(ip->i_mount);
537 xfs_syncd_queue_work(vfs, inode, xfs_flush_device_work);
538 delay(msecs_to_jiffies(500));
539 xfs_log_force(ip->i_mount, (xfs_lsn_t)0, XFS_LOG_FORCE|XFS_LOG_SYNC);
549 if (!(vfsp->vfs_flag & VFS_RDONLY))
550 error = bhv_vfs_sync(vfsp, SYNC_FSDATA | SYNC_BDFLUSH | \
551 SYNC_ATTR | SYNC_REFCACHE, NULL);
552 vfsp->vfs_sync_seq++;
553 wake_up(&vfsp->vfs_wait_single_sync_task);
561 bhv_vfs_t *vfsp = (bhv_vfs_t *) arg;
562 bhv_vfs_sync_work_t *work, *n;
565 timeleft = xfs_syncd_centisecs * msecs_to_jiffies(10);
567 timeleft = schedule_timeout_interruptible(timeleft);
570 if (kthread_should_stop() && list_empty(&vfsp->vfs_sync_list))
573 spin_lock(&vfsp->vfs_sync_lock);
575 * We can get woken by laptop mode, to do a sync -
576 * that's the (only!) case where the list would be
577 * empty with time remaining.
579 if (!timeleft || list_empty(&vfsp->vfs_sync_list)) {
581 timeleft = xfs_syncd_centisecs *
582 msecs_to_jiffies(10);
583 INIT_LIST_HEAD(&vfsp->vfs_sync_work.w_list);
584 list_add_tail(&vfsp->vfs_sync_work.w_list,
585 &vfsp->vfs_sync_list);
587 list_for_each_entry_safe(work, n, &vfsp->vfs_sync_list, w_list)
588 list_move(&work->w_list, &tmp);
589 spin_unlock(&vfsp->vfs_sync_lock);
591 list_for_each_entry_safe(work, n, &tmp, w_list) {
592 (*work->w_syncer)(vfsp, work->w_data);
593 list_del(&work->w_list);
594 if (work == &vfsp->vfs_sync_work)
596 kmem_free(work, sizeof(struct bhv_vfs_sync_work));
607 vfsp->vfs_sync_work.w_syncer = vfs_sync_worker;
608 vfsp->vfs_sync_work.w_vfs = vfsp;
609 vfsp->vfs_sync_task = kthread_run(xfssyncd, vfsp, "xfssyncd");
610 if (IS_ERR(vfsp->vfs_sync_task))
611 return -PTR_ERR(vfsp->vfs_sync_task);
619 kthread_stop(vfsp->vfs_sync_task);
624 struct super_block *sb)
626 bhv_vfs_t *vfsp = vfs_from_sb(sb);
629 xfs_fs_stop_syncd(vfsp);
630 bhv_vfs_sync(vfsp, SYNC_ATTR | SYNC_DELWRI, NULL);
631 error = bhv_vfs_unmount(vfsp, 0, NULL);
633 printk("XFS: unmount got error=%d\n", error);
634 printk("%s: vfs=0x%p left dangling!\n", __FUNCTION__, vfsp);
636 vfs_deallocate(vfsp);
642 struct super_block *sb)
644 if (!(sb->s_flags & MS_RDONLY))
645 bhv_vfs_sync(vfs_from_sb(sb), SYNC_FSDATA, NULL);
651 struct super_block *sb,
654 bhv_vfs_t *vfsp = vfs_from_sb(sb);
658 if (unlikely(sb->s_frozen == SB_FREEZE_WRITE)) {
660 * First stage of freeze - no more writers will make progress
661 * now we are here, so we flush delwri and delalloc buffers
662 * here, then wait for all I/O to complete. Data is frozen at
663 * that point. Metadata is not frozen, transactions can still
664 * occur here so don't bother flushing the buftarg (i.e
665 * SYNC_QUIESCE) because it'll just get dirty again.
667 flags = SYNC_FSDATA | SYNC_DELWRI | SYNC_WAIT | SYNC_IOWAIT;
669 flags = SYNC_FSDATA | (wait ? SYNC_WAIT : 0);
671 error = bhv_vfs_sync(vfsp, flags, NULL);
674 if (unlikely(laptop_mode)) {
675 int prev_sync_seq = vfsp->vfs_sync_seq;
678 * The disk must be active because we're syncing.
679 * We schedule xfssyncd now (now that the disk is
680 * active) instead of later (when it might not be).
682 wake_up_process(vfsp->vfs_sync_task);
684 * We have to wait for the sync iteration to complete.
685 * If we don't, the disk activity caused by the sync
686 * will come after the sync is completed, and that
687 * triggers another sync from laptop mode.
689 wait_event(vfsp->vfs_wait_single_sync_task,
690 vfsp->vfs_sync_seq != prev_sync_seq);
698 struct dentry *dentry,
699 struct kstatfs *statp)
701 return -bhv_vfs_statvfs(vfs_from_sb(dentry->d_sb), statp,
702 vn_from_inode(dentry->d_inode));
707 struct super_block *sb,
711 bhv_vfs_t *vfsp = vfs_from_sb(sb);
712 struct xfs_mount_args *args = xfs_args_allocate(sb, 0);
715 error = bhv_vfs_parseargs(vfsp, options, args, 1);
717 error = bhv_vfs_mntupdate(vfsp, flags, args);
718 kmem_free(args, sizeof(*args));
724 struct super_block *sb)
726 bhv_vfs_freeze(vfs_from_sb(sb));
732 struct vfsmount *mnt)
734 return -bhv_vfs_showargs(vfs_from_sb(mnt->mnt_sb), m);
739 struct super_block *sb,
742 return -bhv_vfs_quotactl(vfs_from_sb(sb), Q_XQUOTASYNC, 0, NULL);
747 struct super_block *sb,
748 struct fs_quota_stat *fqs)
750 return -bhv_vfs_quotactl(vfs_from_sb(sb), Q_XGETQSTAT, 0, (caddr_t)fqs);
755 struct super_block *sb,
759 return -bhv_vfs_quotactl(vfs_from_sb(sb), op, 0, (caddr_t)&flags);
764 struct super_block *sb,
767 struct fs_disk_quota *fdq)
769 return -bhv_vfs_quotactl(vfs_from_sb(sb),
770 (type == USRQUOTA) ? Q_XGETQUOTA :
771 ((type == GRPQUOTA) ? Q_XGETGQUOTA :
772 Q_XGETPQUOTA), id, (caddr_t)fdq);
777 struct super_block *sb,
780 struct fs_disk_quota *fdq)
782 return -bhv_vfs_quotactl(vfs_from_sb(sb),
783 (type == USRQUOTA) ? Q_XSETQLIM :
784 ((type == GRPQUOTA) ? Q_XSETGQLIM :
785 Q_XSETPQLIM), id, (caddr_t)fdq);
790 struct super_block *sb,
794 struct bhv_vnode *rootvp;
795 struct bhv_vfs *vfsp = vfs_allocate(sb);
796 struct xfs_mount_args *args = xfs_args_allocate(sb, silent);
797 struct kstatfs statvfs;
800 bhv_insert_all_vfsops(vfsp);
802 error = bhv_vfs_parseargs(vfsp, (char *)data, args, 0);
804 bhv_remove_all_vfsops(vfsp, 1);
808 sb_min_blocksize(sb, BBSIZE);
809 sb->s_export_op = &xfs_export_operations;
810 sb->s_qcop = &xfs_quotactl_operations;
811 sb->s_op = &xfs_super_operations;
813 error = bhv_vfs_mount(vfsp, args, NULL);
815 bhv_remove_all_vfsops(vfsp, 1);
819 error = bhv_vfs_statvfs(vfsp, &statvfs, NULL);
824 sb->s_magic = statvfs.f_type;
825 sb->s_blocksize = statvfs.f_bsize;
826 sb->s_blocksize_bits = ffs(statvfs.f_bsize) - 1;
827 sb->s_maxbytes = xfs_max_file_offset(sb->s_blocksize_bits);
829 set_posix_acl_flag(sb);
831 error = bhv_vfs_root(vfsp, &rootvp);
835 sb->s_root = d_alloc_root(vn_to_inode(rootvp));
840 if (is_bad_inode(sb->s_root->d_inode)) {
844 if ((error = xfs_fs_start_syncd(vfsp)))
846 vn_trace_exit(rootvp, __FUNCTION__, (inst_t *)__return_address);
848 kmem_free(args, sizeof(*args));
860 bhv_vfs_unmount(vfsp, 0, NULL);
863 vfs_deallocate(vfsp);
864 kmem_free(args, sizeof(*args));
870 struct file_system_type *fs_type,
872 const char *dev_name,
874 struct vfsmount *mnt)
876 return get_sb_bdev(fs_type, flags, dev_name, data, xfs_fs_fill_super,
880 static struct super_operations xfs_super_operations = {
881 .alloc_inode = xfs_fs_alloc_inode,
882 .destroy_inode = xfs_fs_destroy_inode,
883 .write_inode = xfs_fs_write_inode,
884 .clear_inode = xfs_fs_clear_inode,
885 .put_super = xfs_fs_put_super,
886 .write_super = xfs_fs_write_super,
887 .sync_fs = xfs_fs_sync_super,
888 .write_super_lockfs = xfs_fs_lockfs,
889 .statfs = xfs_fs_statfs,
890 .remount_fs = xfs_fs_remount,
891 .show_options = xfs_fs_show_options,
894 static struct quotactl_ops xfs_quotactl_operations = {
895 .quota_sync = xfs_fs_quotasync,
896 .get_xstate = xfs_fs_getxstate,
897 .set_xstate = xfs_fs_setxstate,
898 .get_xquota = xfs_fs_getxquota,
899 .set_xquota = xfs_fs_setxquota,
902 static struct file_system_type xfs_fs_type = {
903 .owner = THIS_MODULE,
905 .get_sb = xfs_fs_get_sb,
906 .kill_sb = kill_block_super,
907 .fs_flags = FS_REQUIRES_DEV,
916 static char message[] __initdata = KERN_INFO \
917 XFS_VERSION_STRING " with " XFS_BUILD_OPTIONS " enabled\n";
922 xfs_physmem = si.totalram;
926 error = xfs_init_zones();
930 error = xfs_buf_init();
939 error = register_filesystem(&xfs_fs_type);
958 unregister_filesystem(&xfs_fs_type);
965 module_init(init_xfs_fs);
966 module_exit(exit_xfs_fs);
968 MODULE_AUTHOR("Silicon Graphics, Inc.");
969 MODULE_DESCRIPTION(XFS_VERSION_STRING " with " XFS_BUILD_OPTIONS " enabled");
970 MODULE_LICENSE("GPL");