1 // SPDX-License-Identifier: GPL-2.0
3 * Copyright (c) 2000-2006 Silicon Graphics, Inc.
8 #include "xfs_shared.h"
9 #include "xfs_format.h"
10 #include "xfs_log_format.h"
11 #include "xfs_trans_resv.h"
13 #include "xfs_mount.h"
14 #include "xfs_inode.h"
15 #include "xfs_btree.h"
17 #include "xfs_alloc.h"
18 #include "xfs_fsops.h"
19 #include "xfs_trans.h"
20 #include "xfs_buf_item.h"
22 #include "xfs_log_priv.h"
24 #include "xfs_extfree_item.h"
25 #include "xfs_mru_cache.h"
26 #include "xfs_inode_item.h"
27 #include "xfs_icache.h"
28 #include "xfs_trace.h"
29 #include "xfs_icreate_item.h"
30 #include "xfs_filestream.h"
31 #include "xfs_quota.h"
32 #include "xfs_sysfs.h"
33 #include "xfs_ondisk.h"
34 #include "xfs_rmap_item.h"
35 #include "xfs_refcount_item.h"
36 #include "xfs_bmap_item.h"
37 #include "xfs_reflink.h"
38 #include "xfs_pwork.h"
40 #include "xfs_defer.h"
41 #include "xfs_attr_item.h"
42 #include "xfs_xattr.h"
43 #include "xfs_iunlink_item.h"
44 #include "xfs_dahash_test.h"
46 #include <linux/magic.h>
47 #include <linux/fs_context.h>
48 #include <linux/fs_parser.h>
50 static const struct super_operations xfs_super_operations;
52 static struct kset *xfs_kset; /* top-level xfs sysfs dir */
54 static struct xfs_kobj xfs_dbg_kobj; /* global debug sysfs attrs */
57 #ifdef CONFIG_HOTPLUG_CPU
58 static LIST_HEAD(xfs_mount_list);
59 static DEFINE_SPINLOCK(xfs_mount_list_lock);
61 static inline void xfs_mount_list_add(struct xfs_mount *mp)
63 spin_lock(&xfs_mount_list_lock);
64 list_add(&mp->m_mount_list, &xfs_mount_list);
65 spin_unlock(&xfs_mount_list_lock);
68 static inline void xfs_mount_list_del(struct xfs_mount *mp)
70 spin_lock(&xfs_mount_list_lock);
71 list_del(&mp->m_mount_list);
72 spin_unlock(&xfs_mount_list_lock);
74 #else /* !CONFIG_HOTPLUG_CPU */
75 static inline void xfs_mount_list_add(struct xfs_mount *mp) {}
76 static inline void xfs_mount_list_del(struct xfs_mount *mp) {}
86 xfs_mount_set_dax_mode(
88 enum xfs_dax_mode mode)
92 mp->m_features &= ~(XFS_FEAT_DAX_ALWAYS | XFS_FEAT_DAX_NEVER);
95 mp->m_features |= XFS_FEAT_DAX_ALWAYS;
96 mp->m_features &= ~XFS_FEAT_DAX_NEVER;
99 mp->m_features |= XFS_FEAT_DAX_NEVER;
100 mp->m_features &= ~XFS_FEAT_DAX_ALWAYS;
105 static const struct constant_table dax_param_enums[] = {
106 {"inode", XFS_DAX_INODE },
107 {"always", XFS_DAX_ALWAYS },
108 {"never", XFS_DAX_NEVER },
113 * Table driven mount option parser.
116 Opt_logbufs, Opt_logbsize, Opt_logdev, Opt_rtdev,
117 Opt_wsync, Opt_noalign, Opt_swalloc, Opt_sunit, Opt_swidth, Opt_nouuid,
118 Opt_grpid, Opt_nogrpid, Opt_bsdgroups, Opt_sysvgroups,
119 Opt_allocsize, Opt_norecovery, Opt_inode64, Opt_inode32, Opt_ikeep,
120 Opt_noikeep, Opt_largeio, Opt_nolargeio, Opt_attr2, Opt_noattr2,
121 Opt_filestreams, Opt_quota, Opt_noquota, Opt_usrquota, Opt_grpquota,
122 Opt_prjquota, Opt_uquota, Opt_gquota, Opt_pquota,
123 Opt_uqnoenforce, Opt_gqnoenforce, Opt_pqnoenforce, Opt_qnoenforce,
124 Opt_discard, Opt_nodiscard, Opt_dax, Opt_dax_enum,
127 static const struct fs_parameter_spec xfs_fs_parameters[] = {
128 fsparam_u32("logbufs", Opt_logbufs),
129 fsparam_string("logbsize", Opt_logbsize),
130 fsparam_string("logdev", Opt_logdev),
131 fsparam_string("rtdev", Opt_rtdev),
132 fsparam_flag("wsync", Opt_wsync),
133 fsparam_flag("noalign", Opt_noalign),
134 fsparam_flag("swalloc", Opt_swalloc),
135 fsparam_u32("sunit", Opt_sunit),
136 fsparam_u32("swidth", Opt_swidth),
137 fsparam_flag("nouuid", Opt_nouuid),
138 fsparam_flag("grpid", Opt_grpid),
139 fsparam_flag("nogrpid", Opt_nogrpid),
140 fsparam_flag("bsdgroups", Opt_bsdgroups),
141 fsparam_flag("sysvgroups", Opt_sysvgroups),
142 fsparam_string("allocsize", Opt_allocsize),
143 fsparam_flag("norecovery", Opt_norecovery),
144 fsparam_flag("inode64", Opt_inode64),
145 fsparam_flag("inode32", Opt_inode32),
146 fsparam_flag("ikeep", Opt_ikeep),
147 fsparam_flag("noikeep", Opt_noikeep),
148 fsparam_flag("largeio", Opt_largeio),
149 fsparam_flag("nolargeio", Opt_nolargeio),
150 fsparam_flag("attr2", Opt_attr2),
151 fsparam_flag("noattr2", Opt_noattr2),
152 fsparam_flag("filestreams", Opt_filestreams),
153 fsparam_flag("quota", Opt_quota),
154 fsparam_flag("noquota", Opt_noquota),
155 fsparam_flag("usrquota", Opt_usrquota),
156 fsparam_flag("grpquota", Opt_grpquota),
157 fsparam_flag("prjquota", Opt_prjquota),
158 fsparam_flag("uquota", Opt_uquota),
159 fsparam_flag("gquota", Opt_gquota),
160 fsparam_flag("pquota", Opt_pquota),
161 fsparam_flag("uqnoenforce", Opt_uqnoenforce),
162 fsparam_flag("gqnoenforce", Opt_gqnoenforce),
163 fsparam_flag("pqnoenforce", Opt_pqnoenforce),
164 fsparam_flag("qnoenforce", Opt_qnoenforce),
165 fsparam_flag("discard", Opt_discard),
166 fsparam_flag("nodiscard", Opt_nodiscard),
167 fsparam_flag("dax", Opt_dax),
168 fsparam_enum("dax", Opt_dax_enum, dax_param_enums),
172 struct proc_xfs_info {
182 static struct proc_xfs_info xfs_info_set[] = {
183 /* the few simple ones we can get from the mount struct */
184 { XFS_FEAT_IKEEP, ",ikeep" },
185 { XFS_FEAT_WSYNC, ",wsync" },
186 { XFS_FEAT_NOALIGN, ",noalign" },
187 { XFS_FEAT_SWALLOC, ",swalloc" },
188 { XFS_FEAT_NOUUID, ",nouuid" },
189 { XFS_FEAT_NORECOVERY, ",norecovery" },
190 { XFS_FEAT_ATTR2, ",attr2" },
191 { XFS_FEAT_FILESTREAMS, ",filestreams" },
192 { XFS_FEAT_GRPID, ",grpid" },
193 { XFS_FEAT_DISCARD, ",discard" },
194 { XFS_FEAT_LARGE_IOSIZE, ",largeio" },
195 { XFS_FEAT_DAX_ALWAYS, ",dax=always" },
196 { XFS_FEAT_DAX_NEVER, ",dax=never" },
199 struct xfs_mount *mp = XFS_M(root->d_sb);
200 struct proc_xfs_info *xfs_infop;
202 for (xfs_infop = xfs_info_set; xfs_infop->flag; xfs_infop++) {
203 if (mp->m_features & xfs_infop->flag)
204 seq_puts(m, xfs_infop->str);
207 seq_printf(m, ",inode%d", xfs_has_small_inums(mp) ? 32 : 64);
209 if (xfs_has_allocsize(mp))
210 seq_printf(m, ",allocsize=%dk",
211 (1 << mp->m_allocsize_log) >> 10);
213 if (mp->m_logbufs > 0)
214 seq_printf(m, ",logbufs=%d", mp->m_logbufs);
215 if (mp->m_logbsize > 0)
216 seq_printf(m, ",logbsize=%dk", mp->m_logbsize >> 10);
219 seq_show_option(m, "logdev", mp->m_logname);
221 seq_show_option(m, "rtdev", mp->m_rtname);
223 if (mp->m_dalign > 0)
224 seq_printf(m, ",sunit=%d",
225 (int)XFS_FSB_TO_BB(mp, mp->m_dalign));
226 if (mp->m_swidth > 0)
227 seq_printf(m, ",swidth=%d",
228 (int)XFS_FSB_TO_BB(mp, mp->m_swidth));
230 if (mp->m_qflags & XFS_UQUOTA_ENFD)
231 seq_puts(m, ",usrquota");
232 else if (mp->m_qflags & XFS_UQUOTA_ACCT)
233 seq_puts(m, ",uqnoenforce");
235 if (mp->m_qflags & XFS_PQUOTA_ENFD)
236 seq_puts(m, ",prjquota");
237 else if (mp->m_qflags & XFS_PQUOTA_ACCT)
238 seq_puts(m, ",pqnoenforce");
240 if (mp->m_qflags & XFS_GQUOTA_ENFD)
241 seq_puts(m, ",grpquota");
242 else if (mp->m_qflags & XFS_GQUOTA_ACCT)
243 seq_puts(m, ",gqnoenforce");
245 if (!(mp->m_qflags & XFS_ALL_QUOTA_ACCT))
246 seq_puts(m, ",noquota");
252 xfs_set_inode_alloc_perag(
253 struct xfs_perag *pag,
255 xfs_agnumber_t max_metadata)
257 if (!xfs_is_inode32(pag->pag_mount)) {
258 set_bit(XFS_AGSTATE_ALLOWS_INODES, &pag->pag_opstate);
259 clear_bit(XFS_AGSTATE_PREFERS_METADATA, &pag->pag_opstate);
263 if (ino > XFS_MAXINUMBER_32) {
264 clear_bit(XFS_AGSTATE_ALLOWS_INODES, &pag->pag_opstate);
265 clear_bit(XFS_AGSTATE_PREFERS_METADATA, &pag->pag_opstate);
269 set_bit(XFS_AGSTATE_ALLOWS_INODES, &pag->pag_opstate);
270 if (pag->pag_agno < max_metadata)
271 set_bit(XFS_AGSTATE_PREFERS_METADATA, &pag->pag_opstate);
273 clear_bit(XFS_AGSTATE_PREFERS_METADATA, &pag->pag_opstate);
278 * Set parameters for inode allocation heuristics, taking into account
279 * filesystem size and inode32/inode64 mount options; i.e. specifically
280 * whether or not XFS_FEAT_SMALL_INUMS is set.
282 * Inode allocation patterns are altered only if inode32 is requested
283 * (XFS_FEAT_SMALL_INUMS), and the filesystem is sufficiently large.
284 * If altered, XFS_OPSTATE_INODE32 is set as well.
286 * An agcount independent of that in the mount structure is provided
287 * because in the growfs case, mp->m_sb.sb_agcount is not yet updated
288 * to the potentially higher ag count.
290 * Returns the maximum AG index which may contain inodes.
294 struct xfs_mount *mp,
295 xfs_agnumber_t agcount)
297 xfs_agnumber_t index;
298 xfs_agnumber_t maxagi = 0;
299 xfs_sb_t *sbp = &mp->m_sb;
300 xfs_agnumber_t max_metadata;
305 * Calculate how much should be reserved for inodes to meet
306 * the max inode percentage. Used only for inode32.
308 if (M_IGEO(mp)->maxicount) {
311 icount = sbp->sb_dblocks * sbp->sb_imax_pct;
313 icount += sbp->sb_agblocks - 1;
314 do_div(icount, sbp->sb_agblocks);
315 max_metadata = icount;
317 max_metadata = agcount;
320 /* Get the last possible inode in the filesystem */
321 agino = XFS_AGB_TO_AGINO(mp, sbp->sb_agblocks - 1);
322 ino = XFS_AGINO_TO_INO(mp, agcount - 1, agino);
325 * If user asked for no more than 32-bit inodes, and the fs is
326 * sufficiently large, set XFS_OPSTATE_INODE32 if we must alter
327 * the allocator to accommodate the request.
329 if (xfs_has_small_inums(mp) && ino > XFS_MAXINUMBER_32)
330 set_bit(XFS_OPSTATE_INODE32, &mp->m_opstate);
332 clear_bit(XFS_OPSTATE_INODE32, &mp->m_opstate);
334 for (index = 0; index < agcount; index++) {
335 struct xfs_perag *pag;
337 ino = XFS_AGINO_TO_INO(mp, index, agino);
339 pag = xfs_perag_get(mp, index);
340 if (xfs_set_inode_alloc_perag(pag, ino, max_metadata))
345 return xfs_is_inode32(mp) ? maxagi : agcount;
349 xfs_setup_dax_always(
350 struct xfs_mount *mp)
352 if (!mp->m_ddev_targp->bt_daxdev &&
353 (!mp->m_rtdev_targp || !mp->m_rtdev_targp->bt_daxdev)) {
355 "DAX unsupported by block device. Turning off DAX.");
359 if (mp->m_super->s_blocksize != PAGE_SIZE) {
361 "DAX not supported for blocksize. Turning off DAX.");
365 if (xfs_has_reflink(mp) &&
366 bdev_is_partition(mp->m_ddev_targp->bt_bdev)) {
368 "DAX and reflink cannot work with multi-partitions!");
372 xfs_warn(mp, "DAX enabled. Warning: EXPERIMENTAL, use at your own risk");
376 xfs_mount_set_dax_mode(mp, XFS_DAX_NEVER);
384 struct block_device **bdevp)
388 *bdevp = blkdev_get_by_path(name, FMODE_READ|FMODE_WRITE|FMODE_EXCL,
390 if (IS_ERR(*bdevp)) {
391 error = PTR_ERR(*bdevp);
392 xfs_warn(mp, "Invalid device [%s], error=%d", name, error);
400 struct block_device *bdev)
403 blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL);
408 struct xfs_mount *mp)
410 if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp) {
411 struct block_device *logdev = mp->m_logdev_targp->bt_bdev;
413 xfs_free_buftarg(mp->m_logdev_targp);
414 xfs_blkdev_put(logdev);
416 if (mp->m_rtdev_targp) {
417 struct block_device *rtdev = mp->m_rtdev_targp->bt_bdev;
419 xfs_free_buftarg(mp->m_rtdev_targp);
420 xfs_blkdev_put(rtdev);
422 xfs_free_buftarg(mp->m_ddev_targp);
426 * The file system configurations are:
427 * (1) device (partition) with data and internal log
428 * (2) logical volume with data and log subvolumes.
429 * (3) logical volume with data, log, and realtime subvolumes.
431 * We only have to handle opening the log and realtime volumes here if
432 * they are present. The data subvolume has already been opened by
433 * get_sb_bdev() and is stored in sb->s_bdev.
437 struct xfs_mount *mp)
439 struct block_device *ddev = mp->m_super->s_bdev;
440 struct block_device *logdev = NULL, *rtdev = NULL;
444 * Open real time and log devices - order is important.
447 error = xfs_blkdev_get(mp, mp->m_logname, &logdev);
453 error = xfs_blkdev_get(mp, mp->m_rtname, &rtdev);
455 goto out_close_logdev;
457 if (rtdev == ddev || rtdev == logdev) {
459 "Cannot mount filesystem with identical rtdev and ddev/logdev.");
461 goto out_close_rtdev;
466 * Setup xfs_mount buffer target pointers
469 mp->m_ddev_targp = xfs_alloc_buftarg(mp, ddev);
470 if (!mp->m_ddev_targp)
471 goto out_close_rtdev;
474 mp->m_rtdev_targp = xfs_alloc_buftarg(mp, rtdev);
475 if (!mp->m_rtdev_targp)
476 goto out_free_ddev_targ;
479 if (logdev && logdev != ddev) {
480 mp->m_logdev_targp = xfs_alloc_buftarg(mp, logdev);
481 if (!mp->m_logdev_targp)
482 goto out_free_rtdev_targ;
484 mp->m_logdev_targp = mp->m_ddev_targp;
490 if (mp->m_rtdev_targp)
491 xfs_free_buftarg(mp->m_rtdev_targp);
493 xfs_free_buftarg(mp->m_ddev_targp);
495 xfs_blkdev_put(rtdev);
497 if (logdev && logdev != ddev)
498 xfs_blkdev_put(logdev);
503 * Setup xfs_mount buffer target pointers based on superblock
507 struct xfs_mount *mp)
511 error = xfs_setsize_buftarg(mp->m_ddev_targp, mp->m_sb.sb_sectsize);
515 if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp) {
516 unsigned int log_sector_size = BBSIZE;
518 if (xfs_has_sector(mp))
519 log_sector_size = mp->m_sb.sb_logsectsize;
520 error = xfs_setsize_buftarg(mp->m_logdev_targp,
525 if (mp->m_rtdev_targp) {
526 error = xfs_setsize_buftarg(mp->m_rtdev_targp,
527 mp->m_sb.sb_sectsize);
536 xfs_init_mount_workqueues(
537 struct xfs_mount *mp)
539 mp->m_buf_workqueue = alloc_workqueue("xfs-buf/%s",
540 XFS_WQFLAGS(WQ_FREEZABLE | WQ_MEM_RECLAIM),
541 1, mp->m_super->s_id);
542 if (!mp->m_buf_workqueue)
545 mp->m_unwritten_workqueue = alloc_workqueue("xfs-conv/%s",
546 XFS_WQFLAGS(WQ_FREEZABLE | WQ_MEM_RECLAIM),
547 0, mp->m_super->s_id);
548 if (!mp->m_unwritten_workqueue)
549 goto out_destroy_buf;
551 mp->m_reclaim_workqueue = alloc_workqueue("xfs-reclaim/%s",
552 XFS_WQFLAGS(WQ_FREEZABLE | WQ_MEM_RECLAIM),
553 0, mp->m_super->s_id);
554 if (!mp->m_reclaim_workqueue)
555 goto out_destroy_unwritten;
557 mp->m_blockgc_wq = alloc_workqueue("xfs-blockgc/%s",
558 XFS_WQFLAGS(WQ_UNBOUND | WQ_FREEZABLE | WQ_MEM_RECLAIM),
559 0, mp->m_super->s_id);
560 if (!mp->m_blockgc_wq)
561 goto out_destroy_reclaim;
563 mp->m_inodegc_wq = alloc_workqueue("xfs-inodegc/%s",
564 XFS_WQFLAGS(WQ_FREEZABLE | WQ_MEM_RECLAIM),
565 1, mp->m_super->s_id);
566 if (!mp->m_inodegc_wq)
567 goto out_destroy_blockgc;
569 mp->m_sync_workqueue = alloc_workqueue("xfs-sync/%s",
570 XFS_WQFLAGS(WQ_FREEZABLE), 0, mp->m_super->s_id);
571 if (!mp->m_sync_workqueue)
572 goto out_destroy_inodegc;
577 destroy_workqueue(mp->m_inodegc_wq);
579 destroy_workqueue(mp->m_blockgc_wq);
581 destroy_workqueue(mp->m_reclaim_workqueue);
582 out_destroy_unwritten:
583 destroy_workqueue(mp->m_unwritten_workqueue);
585 destroy_workqueue(mp->m_buf_workqueue);
591 xfs_destroy_mount_workqueues(
592 struct xfs_mount *mp)
594 destroy_workqueue(mp->m_sync_workqueue);
595 destroy_workqueue(mp->m_blockgc_wq);
596 destroy_workqueue(mp->m_inodegc_wq);
597 destroy_workqueue(mp->m_reclaim_workqueue);
598 destroy_workqueue(mp->m_unwritten_workqueue);
599 destroy_workqueue(mp->m_buf_workqueue);
603 xfs_flush_inodes_worker(
604 struct work_struct *work)
606 struct xfs_mount *mp = container_of(work, struct xfs_mount,
607 m_flush_inodes_work);
608 struct super_block *sb = mp->m_super;
610 if (down_read_trylock(&sb->s_umount)) {
612 up_read(&sb->s_umount);
617 * Flush all dirty data to disk. Must not be called while holding an XFS_ILOCK
618 * or a page lock. We use sync_inodes_sb() here to ensure we block while waiting
619 * for IO to complete so that we effectively throttle multiple callers to the
620 * rate at which IO is completing.
624 struct xfs_mount *mp)
627 * If flush_work() returns true then that means we waited for a flush
628 * which was already in progress. Don't bother running another scan.
630 if (flush_work(&mp->m_flush_inodes_work))
633 queue_work(mp->m_sync_workqueue, &mp->m_flush_inodes_work);
634 flush_work(&mp->m_flush_inodes_work);
637 /* Catch misguided souls that try to use this interface on XFS */
638 STATIC struct inode *
640 struct super_block *sb)
647 * Now that the generic code is guaranteed not to be accessing
648 * the linux inode, we can inactivate and reclaim the inode.
651 xfs_fs_destroy_inode(
654 struct xfs_inode *ip = XFS_I(inode);
656 trace_xfs_destroy_inode(ip);
658 ASSERT(!rwsem_is_locked(&inode->i_rwsem));
659 XFS_STATS_INC(ip->i_mount, vn_rele);
660 XFS_STATS_INC(ip->i_mount, vn_remove);
661 xfs_inode_mark_reclaimable(ip);
669 struct xfs_inode *ip = XFS_I(inode);
670 struct xfs_mount *mp = ip->i_mount;
671 struct xfs_trans *tp;
673 if (!(inode->i_sb->s_flags & SB_LAZYTIME))
677 * Only do the timestamp update if the inode is dirty (I_DIRTY_SYNC)
678 * and has dirty timestamp (I_DIRTY_TIME). I_DIRTY_TIME can be passed
679 * in flags possibly together with I_DIRTY_SYNC.
681 if ((flags & ~I_DIRTY_TIME) != I_DIRTY_SYNC || !(flags & I_DIRTY_TIME))
684 if (xfs_trans_alloc(mp, &M_RES(mp)->tr_fsyncts, 0, 0, 0, &tp))
686 xfs_ilock(ip, XFS_ILOCK_EXCL);
687 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
688 xfs_trans_log_inode(tp, ip, XFS_ILOG_TIMESTAMP);
689 xfs_trans_commit(tp);
693 * Slab object creation initialisation for the XFS inode.
694 * This covers only the idempotent fields in the XFS inode;
695 * all other fields need to be initialised on allocation
696 * from the slab. This avoids the need to repeatedly initialise
697 * fields in the xfs inode that left in the initialise state
698 * when freeing the inode.
701 xfs_fs_inode_init_once(
704 struct xfs_inode *ip = inode;
706 memset(ip, 0, sizeof(struct xfs_inode));
709 inode_init_once(VFS_I(ip));
712 atomic_set(&ip->i_pincount, 0);
713 spin_lock_init(&ip->i_flags_lock);
715 mrlock_init(&ip->i_lock, MRLOCK_ALLOW_EQUAL_PRI|MRLOCK_BARRIER,
716 "xfsino", ip->i_ino);
720 * We do an unlocked check for XFS_IDONTCACHE here because we are already
721 * serialised against cache hits here via the inode->i_lock and igrab() in
722 * xfs_iget_cache_hit(). Hence a lookup that might clear this flag will not be
723 * racing with us, and it avoids needing to grab a spinlock here for every inode
724 * we drop the final reference on.
730 struct xfs_inode *ip = XFS_I(inode);
733 * If this unlinked inode is in the middle of recovery, don't
734 * drop the inode just yet; log recovery will take care of
735 * that. See the comment for this inode flag.
737 if (ip->i_flags & XFS_IRECOVERY) {
738 ASSERT(xlog_recovery_needed(ip->i_mount->m_log));
742 return generic_drop_inode(inode);
747 struct xfs_mount *mp)
750 kfree(mp->m_logname);
756 struct super_block *sb,
759 struct xfs_mount *mp = XFS_M(sb);
762 trace_xfs_fs_sync_fs(mp, __return_address);
765 * Doing anything during the async pass would be counterproductive.
770 error = xfs_log_force(mp, XFS_LOG_SYNC);
776 * The disk must be active because we're syncing.
777 * We schedule log work now (now that the disk is
778 * active) instead of later (when it might not be).
780 flush_delayed_work(&mp->m_log->l_work);
784 * If we are called with page faults frozen out, it means we are about
785 * to freeze the transaction subsystem. Take the opportunity to shut
786 * down inodegc because once SB_FREEZE_FS is set it's too late to
787 * prevent inactivation races with freeze. The fs doesn't get called
788 * again by the freezing process until after SB_FREEZE_FS has been set,
789 * so it's now or never. Same logic applies to speculative allocation
790 * garbage collection.
792 * We don't care if this is a normal syncfs call that does this or
793 * freeze that does this - we can run this multiple times without issue
794 * and we won't race with a restart because a restart can only occur
795 * when the state is either SB_FREEZE_FS or SB_FREEZE_COMPLETE.
797 if (sb->s_writers.frozen == SB_FREEZE_PAGEFAULT) {
798 xfs_inodegc_stop(mp);
799 xfs_blockgc_stop(mp);
807 struct dentry *dentry,
808 struct kstatfs *statp)
810 struct xfs_mount *mp = XFS_M(dentry->d_sb);
811 xfs_sb_t *sbp = &mp->m_sb;
812 struct xfs_inode *ip = XFS_I(d_inode(dentry));
813 uint64_t fakeinos, id;
821 * Expedite background inodegc but don't wait. We do not want to block
822 * here waiting hours for a billion extent file to be truncated.
824 xfs_inodegc_push(mp);
826 statp->f_type = XFS_SUPER_MAGIC;
827 statp->f_namelen = MAXNAMELEN - 1;
829 id = huge_encode_dev(mp->m_ddev_targp->bt_dev);
830 statp->f_fsid = u64_to_fsid(id);
832 icount = percpu_counter_sum(&mp->m_icount);
833 ifree = percpu_counter_sum(&mp->m_ifree);
834 fdblocks = percpu_counter_sum(&mp->m_fdblocks);
836 spin_lock(&mp->m_sb_lock);
837 statp->f_bsize = sbp->sb_blocksize;
838 lsize = sbp->sb_logstart ? sbp->sb_logblocks : 0;
839 statp->f_blocks = sbp->sb_dblocks - lsize;
840 spin_unlock(&mp->m_sb_lock);
842 /* make sure statp->f_bfree does not underflow */
843 statp->f_bfree = max_t(int64_t, 0,
844 fdblocks - xfs_fdblocks_unavailable(mp));
845 statp->f_bavail = statp->f_bfree;
847 fakeinos = XFS_FSB_TO_INO(mp, statp->f_bfree);
848 statp->f_files = min(icount + fakeinos, (uint64_t)XFS_MAXINUMBER);
849 if (M_IGEO(mp)->maxicount)
850 statp->f_files = min_t(typeof(statp->f_files),
852 M_IGEO(mp)->maxicount);
854 /* If sb_icount overshot maxicount, report actual allocation */
855 statp->f_files = max_t(typeof(statp->f_files),
859 /* make sure statp->f_ffree does not underflow */
860 ffree = statp->f_files - (icount - ifree);
861 statp->f_ffree = max_t(int64_t, ffree, 0);
864 if ((ip->i_diflags & XFS_DIFLAG_PROJINHERIT) &&
865 ((mp->m_qflags & (XFS_PQUOTA_ACCT|XFS_PQUOTA_ENFD))) ==
866 (XFS_PQUOTA_ACCT|XFS_PQUOTA_ENFD))
867 xfs_qm_statvfs(ip, statp);
869 if (XFS_IS_REALTIME_MOUNT(mp) &&
870 (ip->i_diflags & (XFS_DIFLAG_RTINHERIT | XFS_DIFLAG_REALTIME))) {
873 statp->f_blocks = sbp->sb_rblocks;
874 freertx = percpu_counter_sum_positive(&mp->m_frextents);
875 statp->f_bavail = statp->f_bfree = freertx * sbp->sb_rextsize;
882 xfs_save_resvblks(struct xfs_mount *mp)
884 uint64_t resblks = 0;
886 mp->m_resblks_save = mp->m_resblks;
887 xfs_reserve_blocks(mp, &resblks, NULL);
891 xfs_restore_resvblks(struct xfs_mount *mp)
895 if (mp->m_resblks_save) {
896 resblks = mp->m_resblks_save;
897 mp->m_resblks_save = 0;
899 resblks = xfs_default_resblks(mp);
901 xfs_reserve_blocks(mp, &resblks, NULL);
905 * Second stage of a freeze. The data is already frozen so we only
906 * need to take care of the metadata. Once that's done sync the superblock
907 * to the log to dirty it in case of a crash while frozen. This ensures that we
908 * will recover the unlinked inode lists on the next mount.
912 struct super_block *sb)
914 struct xfs_mount *mp = XFS_M(sb);
919 * The filesystem is now frozen far enough that memory reclaim
920 * cannot safely operate on the filesystem. Hence we need to
921 * set a GFP_NOFS context here to avoid recursion deadlocks.
923 flags = memalloc_nofs_save();
924 xfs_save_resvblks(mp);
925 ret = xfs_log_quiesce(mp);
926 memalloc_nofs_restore(flags);
929 * For read-write filesystems, we need to restart the inodegc on error
930 * because we stopped it at SB_FREEZE_PAGEFAULT level and a thaw is not
931 * going to be run to restart it now. We are at SB_FREEZE_FS level
932 * here, so we can restart safely without racing with a stop in
935 if (ret && !xfs_is_readonly(mp)) {
936 xfs_blockgc_start(mp);
937 xfs_inodegc_start(mp);
945 struct super_block *sb)
947 struct xfs_mount *mp = XFS_M(sb);
949 xfs_restore_resvblks(mp);
950 xfs_log_work_queue(mp);
953 * Don't reactivate the inodegc worker on a readonly filesystem because
954 * inodes are sent directly to reclaim. Don't reactivate the blockgc
955 * worker because there are no speculative preallocations on a readonly
958 if (!xfs_is_readonly(mp)) {
959 xfs_blockgc_start(mp);
960 xfs_inodegc_start(mp);
967 * This function fills in xfs_mount_t fields based on mount args.
968 * Note: the superblock _has_ now been read in.
972 struct xfs_mount *mp)
974 /* Fail a mount where the logbuf is smaller than the log stripe */
975 if (xfs_has_logv2(mp)) {
976 if (mp->m_logbsize <= 0 &&
977 mp->m_sb.sb_logsunit > XLOG_BIG_RECORD_BSIZE) {
978 mp->m_logbsize = mp->m_sb.sb_logsunit;
979 } else if (mp->m_logbsize > 0 &&
980 mp->m_logbsize < mp->m_sb.sb_logsunit) {
982 "logbuf size must be greater than or equal to log stripe size");
986 /* Fail a mount if the logbuf is larger than 32K */
987 if (mp->m_logbsize > XLOG_BIG_RECORD_BSIZE) {
989 "logbuf size for version 1 logs must be 16K or 32K");
995 * V5 filesystems always use attr2 format for attributes.
997 if (xfs_has_crc(mp) && xfs_has_noattr2(mp)) {
998 xfs_warn(mp, "Cannot mount a V5 filesystem as noattr2. "
999 "attr2 is always enabled for V5 filesystems.");
1004 * prohibit r/w mounts of read-only filesystems
1006 if ((mp->m_sb.sb_flags & XFS_SBF_READONLY) && !xfs_is_readonly(mp)) {
1008 "cannot mount a read-only filesystem as read-write");
1012 if ((mp->m_qflags & XFS_GQUOTA_ACCT) &&
1013 (mp->m_qflags & XFS_PQUOTA_ACCT) &&
1014 !xfs_has_pquotino(mp)) {
1016 "Super block does not support project and group quota together");
1024 xfs_init_percpu_counters(
1025 struct xfs_mount *mp)
1029 error = percpu_counter_init(&mp->m_icount, 0, GFP_KERNEL);
1033 error = percpu_counter_init(&mp->m_ifree, 0, GFP_KERNEL);
1037 error = percpu_counter_init(&mp->m_fdblocks, 0, GFP_KERNEL);
1041 error = percpu_counter_init(&mp->m_delalloc_blks, 0, GFP_KERNEL);
1045 error = percpu_counter_init(&mp->m_frextents, 0, GFP_KERNEL);
1052 percpu_counter_destroy(&mp->m_delalloc_blks);
1054 percpu_counter_destroy(&mp->m_fdblocks);
1056 percpu_counter_destroy(&mp->m_ifree);
1058 percpu_counter_destroy(&mp->m_icount);
1063 xfs_reinit_percpu_counters(
1064 struct xfs_mount *mp)
1066 percpu_counter_set(&mp->m_icount, mp->m_sb.sb_icount);
1067 percpu_counter_set(&mp->m_ifree, mp->m_sb.sb_ifree);
1068 percpu_counter_set(&mp->m_fdblocks, mp->m_sb.sb_fdblocks);
1069 percpu_counter_set(&mp->m_frextents, mp->m_sb.sb_frextents);
1073 xfs_destroy_percpu_counters(
1074 struct xfs_mount *mp)
1076 percpu_counter_destroy(&mp->m_icount);
1077 percpu_counter_destroy(&mp->m_ifree);
1078 percpu_counter_destroy(&mp->m_fdblocks);
1079 ASSERT(xfs_is_shutdown(mp) ||
1080 percpu_counter_sum(&mp->m_delalloc_blks) == 0);
1081 percpu_counter_destroy(&mp->m_delalloc_blks);
1082 percpu_counter_destroy(&mp->m_frextents);
1086 xfs_inodegc_init_percpu(
1087 struct xfs_mount *mp)
1089 struct xfs_inodegc *gc;
1092 mp->m_inodegc = alloc_percpu(struct xfs_inodegc);
1096 for_each_possible_cpu(cpu) {
1097 gc = per_cpu_ptr(mp->m_inodegc, cpu);
1098 #if defined(DEBUG) || defined(XFS_WARN)
1101 init_llist_head(&gc->list);
1104 INIT_DELAYED_WORK(&gc->work, xfs_inodegc_worker);
1110 xfs_inodegc_free_percpu(
1111 struct xfs_mount *mp)
1115 free_percpu(mp->m_inodegc);
1120 struct super_block *sb)
1122 struct xfs_mount *mp = XFS_M(sb);
1124 /* if ->fill_super failed, we have no mount to tear down */
1128 xfs_notice(mp, "Unmounting Filesystem %pU", &mp->m_sb.sb_uuid);
1129 xfs_filestream_unmount(mp);
1133 free_percpu(mp->m_stats.xs_stats);
1134 xfs_mount_list_del(mp);
1135 xfs_inodegc_free_percpu(mp);
1136 xfs_destroy_percpu_counters(mp);
1137 xfs_destroy_mount_workqueues(mp);
1138 xfs_close_devices(mp);
1140 sb->s_fs_info = NULL;
1145 xfs_fs_nr_cached_objects(
1146 struct super_block *sb,
1147 struct shrink_control *sc)
1149 /* Paranoia: catch incorrect calls during mount setup or teardown */
1150 if (WARN_ON_ONCE(!sb->s_fs_info))
1152 return xfs_reclaim_inodes_count(XFS_M(sb));
1156 xfs_fs_free_cached_objects(
1157 struct super_block *sb,
1158 struct shrink_control *sc)
1160 return xfs_reclaim_inodes_nr(XFS_M(sb), sc->nr_to_scan);
1163 static const struct super_operations xfs_super_operations = {
1164 .alloc_inode = xfs_fs_alloc_inode,
1165 .destroy_inode = xfs_fs_destroy_inode,
1166 .dirty_inode = xfs_fs_dirty_inode,
1167 .drop_inode = xfs_fs_drop_inode,
1168 .put_super = xfs_fs_put_super,
1169 .sync_fs = xfs_fs_sync_fs,
1170 .freeze_fs = xfs_fs_freeze,
1171 .unfreeze_fs = xfs_fs_unfreeze,
1172 .statfs = xfs_fs_statfs,
1173 .show_options = xfs_fs_show_options,
1174 .nr_cached_objects = xfs_fs_nr_cached_objects,
1175 .free_cached_objects = xfs_fs_free_cached_objects,
1184 int last, shift_left_factor = 0, _res;
1188 value = kstrdup(s, GFP_KERNEL);
1192 last = strlen(value) - 1;
1193 if (value[last] == 'K' || value[last] == 'k') {
1194 shift_left_factor = 10;
1197 if (value[last] == 'M' || value[last] == 'm') {
1198 shift_left_factor = 20;
1201 if (value[last] == 'G' || value[last] == 'g') {
1202 shift_left_factor = 30;
1206 if (kstrtoint(value, base, &_res))
1209 *res = _res << shift_left_factor;
1214 xfs_fs_warn_deprecated(
1215 struct fs_context *fc,
1216 struct fs_parameter *param,
1220 /* Don't print the warning if reconfiguring and current mount point
1221 * already had the flag set
1223 if ((fc->purpose & FS_CONTEXT_FOR_RECONFIGURE) &&
1224 !!(XFS_M(fc->root->d_sb)->m_features & flag) == value)
1226 xfs_warn(fc->s_fs_info, "%s mount option is deprecated.", param->key);
1230 * Set mount state from a mount option.
1232 * NOTE: mp->m_super is NULL here!
1236 struct fs_context *fc,
1237 struct fs_parameter *param)
1239 struct xfs_mount *parsing_mp = fc->s_fs_info;
1240 struct fs_parse_result result;
1244 opt = fs_parse(fc, xfs_fs_parameters, param, &result);
1250 parsing_mp->m_logbufs = result.uint_32;
1253 if (suffix_kstrtoint(param->string, 10, &parsing_mp->m_logbsize))
1257 kfree(parsing_mp->m_logname);
1258 parsing_mp->m_logname = kstrdup(param->string, GFP_KERNEL);
1259 if (!parsing_mp->m_logname)
1263 kfree(parsing_mp->m_rtname);
1264 parsing_mp->m_rtname = kstrdup(param->string, GFP_KERNEL);
1265 if (!parsing_mp->m_rtname)
1269 if (suffix_kstrtoint(param->string, 10, &size))
1271 parsing_mp->m_allocsize_log = ffs(size) - 1;
1272 parsing_mp->m_features |= XFS_FEAT_ALLOCSIZE;
1276 parsing_mp->m_features |= XFS_FEAT_GRPID;
1279 case Opt_sysvgroups:
1280 parsing_mp->m_features &= ~XFS_FEAT_GRPID;
1283 parsing_mp->m_features |= XFS_FEAT_WSYNC;
1285 case Opt_norecovery:
1286 parsing_mp->m_features |= XFS_FEAT_NORECOVERY;
1289 parsing_mp->m_features |= XFS_FEAT_NOALIGN;
1292 parsing_mp->m_features |= XFS_FEAT_SWALLOC;
1295 parsing_mp->m_dalign = result.uint_32;
1298 parsing_mp->m_swidth = result.uint_32;
1301 parsing_mp->m_features |= XFS_FEAT_SMALL_INUMS;
1304 parsing_mp->m_features &= ~XFS_FEAT_SMALL_INUMS;
1307 parsing_mp->m_features |= XFS_FEAT_NOUUID;
1310 parsing_mp->m_features |= XFS_FEAT_LARGE_IOSIZE;
1313 parsing_mp->m_features &= ~XFS_FEAT_LARGE_IOSIZE;
1315 case Opt_filestreams:
1316 parsing_mp->m_features |= XFS_FEAT_FILESTREAMS;
1319 parsing_mp->m_qflags &= ~XFS_ALL_QUOTA_ACCT;
1320 parsing_mp->m_qflags &= ~XFS_ALL_QUOTA_ENFD;
1325 parsing_mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ENFD);
1327 case Opt_qnoenforce:
1328 case Opt_uqnoenforce:
1329 parsing_mp->m_qflags |= XFS_UQUOTA_ACCT;
1330 parsing_mp->m_qflags &= ~XFS_UQUOTA_ENFD;
1334 parsing_mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ENFD);
1336 case Opt_pqnoenforce:
1337 parsing_mp->m_qflags |= XFS_PQUOTA_ACCT;
1338 parsing_mp->m_qflags &= ~XFS_PQUOTA_ENFD;
1342 parsing_mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ENFD);
1344 case Opt_gqnoenforce:
1345 parsing_mp->m_qflags |= XFS_GQUOTA_ACCT;
1346 parsing_mp->m_qflags &= ~XFS_GQUOTA_ENFD;
1349 parsing_mp->m_features |= XFS_FEAT_DISCARD;
1352 parsing_mp->m_features &= ~XFS_FEAT_DISCARD;
1354 #ifdef CONFIG_FS_DAX
1356 xfs_mount_set_dax_mode(parsing_mp, XFS_DAX_ALWAYS);
1359 xfs_mount_set_dax_mode(parsing_mp, result.uint_32);
1362 /* Following mount options will be removed in September 2025 */
1364 xfs_fs_warn_deprecated(fc, param, XFS_FEAT_IKEEP, true);
1365 parsing_mp->m_features |= XFS_FEAT_IKEEP;
1368 xfs_fs_warn_deprecated(fc, param, XFS_FEAT_IKEEP, false);
1369 parsing_mp->m_features &= ~XFS_FEAT_IKEEP;
1372 xfs_fs_warn_deprecated(fc, param, XFS_FEAT_ATTR2, true);
1373 parsing_mp->m_features |= XFS_FEAT_ATTR2;
1376 xfs_fs_warn_deprecated(fc, param, XFS_FEAT_NOATTR2, true);
1377 parsing_mp->m_features |= XFS_FEAT_NOATTR2;
1380 xfs_warn(parsing_mp, "unknown mount option [%s].", param->key);
1388 xfs_fs_validate_params(
1389 struct xfs_mount *mp)
1391 /* No recovery flag requires a read-only mount */
1392 if (xfs_has_norecovery(mp) && !xfs_is_readonly(mp)) {
1393 xfs_warn(mp, "no-recovery mounts must be read-only.");
1398 * We have not read the superblock at this point, so only the attr2
1399 * mount option can set the attr2 feature by this stage.
1401 if (xfs_has_attr2(mp) && xfs_has_noattr2(mp)) {
1402 xfs_warn(mp, "attr2 and noattr2 cannot both be specified.");
1407 if (xfs_has_noalign(mp) && (mp->m_dalign || mp->m_swidth)) {
1409 "sunit and swidth options incompatible with the noalign option");
1413 if (!IS_ENABLED(CONFIG_XFS_QUOTA) && mp->m_qflags != 0) {
1414 xfs_warn(mp, "quota support not available in this kernel.");
1418 if ((mp->m_dalign && !mp->m_swidth) ||
1419 (!mp->m_dalign && mp->m_swidth)) {
1420 xfs_warn(mp, "sunit and swidth must be specified together");
1424 if (mp->m_dalign && (mp->m_swidth % mp->m_dalign != 0)) {
1426 "stripe width (%d) must be a multiple of the stripe unit (%d)",
1427 mp->m_swidth, mp->m_dalign);
1431 if (mp->m_logbufs != -1 &&
1432 mp->m_logbufs != 0 &&
1433 (mp->m_logbufs < XLOG_MIN_ICLOGS ||
1434 mp->m_logbufs > XLOG_MAX_ICLOGS)) {
1435 xfs_warn(mp, "invalid logbufs value: %d [not %d-%d]",
1436 mp->m_logbufs, XLOG_MIN_ICLOGS, XLOG_MAX_ICLOGS);
1440 if (mp->m_logbsize != -1 &&
1441 mp->m_logbsize != 0 &&
1442 (mp->m_logbsize < XLOG_MIN_RECORD_BSIZE ||
1443 mp->m_logbsize > XLOG_MAX_RECORD_BSIZE ||
1444 !is_power_of_2(mp->m_logbsize))) {
1446 "invalid logbufsize: %d [not 16k,32k,64k,128k or 256k]",
1451 if (xfs_has_allocsize(mp) &&
1452 (mp->m_allocsize_log > XFS_MAX_IO_LOG ||
1453 mp->m_allocsize_log < XFS_MIN_IO_LOG)) {
1454 xfs_warn(mp, "invalid log iosize: %d [not %d-%d]",
1455 mp->m_allocsize_log, XFS_MIN_IO_LOG, XFS_MAX_IO_LOG);
1464 struct super_block *sb,
1465 struct fs_context *fc)
1467 struct xfs_mount *mp = sb->s_fs_info;
1469 int flags = 0, error;
1473 error = xfs_fs_validate_params(mp);
1475 goto out_free_names;
1477 sb_min_blocksize(sb, BBSIZE);
1478 sb->s_xattr = xfs_xattr_handlers;
1479 sb->s_export_op = &xfs_export_operations;
1480 #ifdef CONFIG_XFS_QUOTA
1481 sb->s_qcop = &xfs_quotactl_operations;
1482 sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP | QTYPE_MASK_PRJ;
1484 sb->s_op = &xfs_super_operations;
1487 * Delay mount work if the debug hook is set. This is debug
1488 * instrumention to coordinate simulation of xfs mount failures with
1489 * VFS superblock operations
1491 if (xfs_globals.mount_delay) {
1492 xfs_notice(mp, "Delaying mount for %d seconds.",
1493 xfs_globals.mount_delay);
1494 msleep(xfs_globals.mount_delay * 1000);
1497 if (fc->sb_flags & SB_SILENT)
1498 flags |= XFS_MFSI_QUIET;
1500 error = xfs_open_devices(mp);
1502 goto out_free_names;
1504 error = xfs_init_mount_workqueues(mp);
1506 goto out_close_devices;
1508 error = xfs_init_percpu_counters(mp);
1510 goto out_destroy_workqueues;
1512 error = xfs_inodegc_init_percpu(mp);
1514 goto out_destroy_counters;
1517 * All percpu data structures requiring cleanup when a cpu goes offline
1518 * must be allocated before adding this @mp to the cpu-dead handler's
1521 xfs_mount_list_add(mp);
1523 /* Allocate stats memory before we do operations that might use it */
1524 mp->m_stats.xs_stats = alloc_percpu(struct xfsstats);
1525 if (!mp->m_stats.xs_stats) {
1527 goto out_destroy_inodegc;
1530 error = xfs_readsb(mp, flags);
1532 goto out_free_stats;
1534 error = xfs_finish_flags(mp);
1538 error = xfs_setup_devices(mp);
1542 /* V4 support is undergoing deprecation. */
1543 if (!xfs_has_crc(mp)) {
1544 #ifdef CONFIG_XFS_SUPPORT_V4
1546 "Deprecated V4 format (crc=0) will not be supported after September 2030.");
1549 "Deprecated V4 format (crc=0) not supported by kernel.");
1555 /* ASCII case insensitivity is undergoing deprecation. */
1556 if (xfs_has_asciici(mp)) {
1557 #ifdef CONFIG_XFS_SUPPORT_ASCII_CI
1559 "Deprecated ASCII case-insensitivity feature (ascii-ci=1) will not be supported after September 2030.");
1562 "Deprecated ASCII case-insensitivity feature (ascii-ci=1) not supported by kernel.");
1568 /* Filesystem claims it needs repair, so refuse the mount. */
1569 if (xfs_has_needsrepair(mp)) {
1570 xfs_warn(mp, "Filesystem needs repair. Please run xfs_repair.");
1571 error = -EFSCORRUPTED;
1576 * Don't touch the filesystem if a user tool thinks it owns the primary
1577 * superblock. mkfs doesn't clear the flag from secondary supers, so
1578 * we don't check them at all.
1580 if (mp->m_sb.sb_inprogress) {
1581 xfs_warn(mp, "Offline file system operation in progress!");
1582 error = -EFSCORRUPTED;
1587 * Until this is fixed only page-sized or smaller data blocks work.
1589 if (mp->m_sb.sb_blocksize > PAGE_SIZE) {
1591 "File system with blocksize %d bytes. "
1592 "Only pagesize (%ld) or less will currently work.",
1593 mp->m_sb.sb_blocksize, PAGE_SIZE);
1598 /* Ensure this filesystem fits in the page cache limits */
1599 if (xfs_sb_validate_fsb_count(&mp->m_sb, mp->m_sb.sb_dblocks) ||
1600 xfs_sb_validate_fsb_count(&mp->m_sb, mp->m_sb.sb_rblocks)) {
1602 "file system too large to be mounted on this system.");
1608 * XFS block mappings use 54 bits to store the logical block offset.
1609 * This should suffice to handle the maximum file size that the VFS
1610 * supports (currently 2^63 bytes on 64-bit and ULONG_MAX << PAGE_SHIFT
1611 * bytes on 32-bit), but as XFS and VFS have gotten the s_maxbytes
1612 * calculation wrong on 32-bit kernels in the past, we'll add a WARN_ON
1613 * to check this assertion.
1615 * Avoid integer overflow by comparing the maximum bmbt offset to the
1616 * maximum pagecache offset in units of fs blocks.
1618 if (!xfs_verify_fileoff(mp, XFS_B_TO_FSBT(mp, MAX_LFS_FILESIZE))) {
1620 "MAX_LFS_FILESIZE block offset (%llu) exceeds extent map maximum (%llu)!",
1621 XFS_B_TO_FSBT(mp, MAX_LFS_FILESIZE),
1627 error = xfs_filestream_mount(mp);
1632 * we must configure the block size in the superblock before we run the
1633 * full mount process as the mount process can lookup and cache inodes.
1635 sb->s_magic = XFS_SUPER_MAGIC;
1636 sb->s_blocksize = mp->m_sb.sb_blocksize;
1637 sb->s_blocksize_bits = ffs(sb->s_blocksize) - 1;
1638 sb->s_maxbytes = MAX_LFS_FILESIZE;
1639 sb->s_max_links = XFS_MAXLINK;
1640 sb->s_time_gran = 1;
1641 if (xfs_has_bigtime(mp)) {
1642 sb->s_time_min = xfs_bigtime_to_unix(XFS_BIGTIME_TIME_MIN);
1643 sb->s_time_max = xfs_bigtime_to_unix(XFS_BIGTIME_TIME_MAX);
1645 sb->s_time_min = XFS_LEGACY_TIME_MIN;
1646 sb->s_time_max = XFS_LEGACY_TIME_MAX;
1648 trace_xfs_inode_timestamp_range(mp, sb->s_time_min, sb->s_time_max);
1649 sb->s_iflags |= SB_I_CGROUPWB;
1651 set_posix_acl_flag(sb);
1653 /* version 5 superblocks support inode version counters. */
1654 if (xfs_has_crc(mp))
1655 sb->s_flags |= SB_I_VERSION;
1657 if (xfs_has_dax_always(mp)) {
1658 error = xfs_setup_dax_always(mp);
1660 goto out_filestream_unmount;
1663 if (xfs_has_discard(mp) && !bdev_max_discard_sectors(sb->s_bdev)) {
1665 "mounting with \"discard\" option, but the device does not support discard");
1666 mp->m_features &= ~XFS_FEAT_DISCARD;
1669 if (xfs_has_reflink(mp)) {
1670 if (mp->m_sb.sb_rblocks) {
1672 "reflink not compatible with realtime device!");
1674 goto out_filestream_unmount;
1677 if (xfs_globals.always_cow) {
1678 xfs_info(mp, "using DEBUG-only always_cow mode.");
1679 mp->m_always_cow = true;
1683 if (xfs_has_rmapbt(mp) && mp->m_sb.sb_rblocks) {
1685 "reverse mapping btree not compatible with realtime device!");
1687 goto out_filestream_unmount;
1690 if (xfs_has_large_extent_counts(mp))
1692 "EXPERIMENTAL Large extent counts feature in use. Use at your own risk!");
1694 error = xfs_mountfs(mp);
1696 goto out_filestream_unmount;
1698 root = igrab(VFS_I(mp->m_rootip));
1703 sb->s_root = d_make_root(root);
1711 out_filestream_unmount:
1712 xfs_filestream_unmount(mp);
1716 free_percpu(mp->m_stats.xs_stats);
1717 out_destroy_inodegc:
1718 xfs_mount_list_del(mp);
1719 xfs_inodegc_free_percpu(mp);
1720 out_destroy_counters:
1721 xfs_destroy_percpu_counters(mp);
1722 out_destroy_workqueues:
1723 xfs_destroy_mount_workqueues(mp);
1725 xfs_close_devices(mp);
1727 sb->s_fs_info = NULL;
1732 xfs_filestream_unmount(mp);
1739 struct fs_context *fc)
1741 return get_tree_bdev(fc, xfs_fs_fill_super);
1746 struct xfs_mount *mp)
1748 struct xfs_sb *sbp = &mp->m_sb;
1751 if (xfs_has_norecovery(mp)) {
1753 "ro->rw transition prohibited on norecovery mount");
1757 if (xfs_sb_is_v5(sbp) &&
1758 xfs_sb_has_ro_compat_feature(sbp, XFS_SB_FEAT_RO_COMPAT_UNKNOWN)) {
1760 "ro->rw transition prohibited on unknown (0x%x) ro-compat filesystem",
1761 (sbp->sb_features_ro_compat &
1762 XFS_SB_FEAT_RO_COMPAT_UNKNOWN));
1766 clear_bit(XFS_OPSTATE_READONLY, &mp->m_opstate);
1769 * If this is the first remount to writeable state we might have some
1770 * superblock changes to update.
1772 if (mp->m_update_sb) {
1773 error = xfs_sync_sb(mp, false);
1775 xfs_warn(mp, "failed to write sb changes");
1778 mp->m_update_sb = false;
1782 * Fill out the reserve pool if it is empty. Use the stashed value if
1783 * it is non-zero, otherwise go with the default.
1785 xfs_restore_resvblks(mp);
1786 xfs_log_work_queue(mp);
1787 xfs_blockgc_start(mp);
1789 /* Create the per-AG metadata reservation pool .*/
1790 error = xfs_fs_reserve_ag_blocks(mp);
1791 if (error && error != -ENOSPC)
1794 /* Re-enable the background inode inactivation worker. */
1795 xfs_inodegc_start(mp);
1802 struct xfs_mount *mp)
1804 struct xfs_icwalk icw = {
1805 .icw_flags = XFS_ICWALK_FLAG_SYNC,
1809 /* Flush all the dirty data to disk. */
1810 error = sync_filesystem(mp->m_super);
1815 * Cancel background eofb scanning so it cannot race with the final
1816 * log force+buftarg wait and deadlock the remount.
1818 xfs_blockgc_stop(mp);
1821 * Clear out all remaining COW staging extents and speculative post-EOF
1822 * preallocations so that we don't leave inodes requiring inactivation
1823 * cleanups during reclaim on a read-only mount. We must process every
1824 * cached inode, so this requires a synchronous cache scan.
1826 error = xfs_blockgc_free_space(mp, &icw);
1828 xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE);
1833 * Stop the inodegc background worker. xfs_fs_reconfigure already
1834 * flushed all pending inodegc work when it sync'd the filesystem.
1835 * The VFS holds s_umount, so we know that inodes cannot enter
1836 * xfs_fs_destroy_inode during a remount operation. In readonly mode
1837 * we send inodes straight to reclaim, so no inodes will be queued.
1839 xfs_inodegc_stop(mp);
1841 /* Free the per-AG metadata reservation pool. */
1842 error = xfs_fs_unreserve_ag_blocks(mp);
1844 xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE);
1849 * Before we sync the metadata, we need to free up the reserve block
1850 * pool so that the used block count in the superblock on disk is
1851 * correct at the end of the remount. Stash the current* reserve pool
1852 * size so that if we get remounted rw, we can return it to the same
1855 xfs_save_resvblks(mp);
1858 set_bit(XFS_OPSTATE_READONLY, &mp->m_opstate);
1864 * Logically we would return an error here to prevent users from believing
1865 * they might have changed mount options using remount which can't be changed.
1867 * But unfortunately mount(8) adds all options from mtab and fstab to the mount
1868 * arguments in some cases so we can't blindly reject options, but have to
1869 * check for each specified option if it actually differs from the currently
1870 * set option and only reject it if that's the case.
1872 * Until that is implemented we return success for every remount request, and
1873 * silently ignore all options that we can't actually change.
1877 struct fs_context *fc)
1879 struct xfs_mount *mp = XFS_M(fc->root->d_sb);
1880 struct xfs_mount *new_mp = fc->s_fs_info;
1881 int flags = fc->sb_flags;
1884 /* version 5 superblocks always support version counters. */
1885 if (xfs_has_crc(mp))
1886 fc->sb_flags |= SB_I_VERSION;
1888 error = xfs_fs_validate_params(new_mp);
1892 /* inode32 -> inode64 */
1893 if (xfs_has_small_inums(mp) && !xfs_has_small_inums(new_mp)) {
1894 mp->m_features &= ~XFS_FEAT_SMALL_INUMS;
1895 mp->m_maxagi = xfs_set_inode_alloc(mp, mp->m_sb.sb_agcount);
1898 /* inode64 -> inode32 */
1899 if (!xfs_has_small_inums(mp) && xfs_has_small_inums(new_mp)) {
1900 mp->m_features |= XFS_FEAT_SMALL_INUMS;
1901 mp->m_maxagi = xfs_set_inode_alloc(mp, mp->m_sb.sb_agcount);
1905 if (xfs_is_readonly(mp) && !(flags & SB_RDONLY)) {
1906 error = xfs_remount_rw(mp);
1912 if (!xfs_is_readonly(mp) && (flags & SB_RDONLY)) {
1913 error = xfs_remount_ro(mp);
1921 static void xfs_fs_free(
1922 struct fs_context *fc)
1924 struct xfs_mount *mp = fc->s_fs_info;
1927 * mp is stored in the fs_context when it is initialized.
1928 * mp is transferred to the superblock on a successful mount,
1929 * but if an error occurs before the transfer we have to free
1936 static const struct fs_context_operations xfs_context_ops = {
1937 .parse_param = xfs_fs_parse_param,
1938 .get_tree = xfs_fs_get_tree,
1939 .reconfigure = xfs_fs_reconfigure,
1940 .free = xfs_fs_free,
1943 static int xfs_init_fs_context(
1944 struct fs_context *fc)
1946 struct xfs_mount *mp;
1948 mp = kmem_alloc(sizeof(struct xfs_mount), KM_ZERO);
1952 spin_lock_init(&mp->m_sb_lock);
1953 INIT_RADIX_TREE(&mp->m_perag_tree, GFP_ATOMIC);
1954 spin_lock_init(&mp->m_perag_lock);
1955 mutex_init(&mp->m_growlock);
1956 INIT_WORK(&mp->m_flush_inodes_work, xfs_flush_inodes_worker);
1957 INIT_DELAYED_WORK(&mp->m_reclaim_work, xfs_reclaim_worker);
1958 mp->m_kobj.kobject.kset = xfs_kset;
1960 * We don't create the finobt per-ag space reservation until after log
1961 * recovery, so we must set this to true so that an ifree transaction
1962 * started during log recovery will not depend on space reservations
1963 * for finobt expansion.
1965 mp->m_finobt_nores = true;
1968 * These can be overridden by the mount option parsing.
1971 mp->m_logbsize = -1;
1972 mp->m_allocsize_log = 16; /* 64k */
1975 * Copy binary VFS mount flags we are interested in.
1977 if (fc->sb_flags & SB_RDONLY)
1978 set_bit(XFS_OPSTATE_READONLY, &mp->m_opstate);
1979 if (fc->sb_flags & SB_DIRSYNC)
1980 mp->m_features |= XFS_FEAT_DIRSYNC;
1981 if (fc->sb_flags & SB_SYNCHRONOUS)
1982 mp->m_features |= XFS_FEAT_WSYNC;
1985 fc->ops = &xfs_context_ops;
1990 static struct file_system_type xfs_fs_type = {
1991 .owner = THIS_MODULE,
1993 .init_fs_context = xfs_init_fs_context,
1994 .parameters = xfs_fs_parameters,
1995 .kill_sb = kill_block_super,
1996 .fs_flags = FS_REQUIRES_DEV | FS_ALLOW_IDMAP,
1998 MODULE_ALIAS_FS("xfs");
2001 xfs_init_caches(void)
2005 xfs_buf_cache = kmem_cache_create("xfs_buf", sizeof(struct xfs_buf), 0,
2006 SLAB_HWCACHE_ALIGN |
2007 SLAB_RECLAIM_ACCOUNT |
2013 xfs_log_ticket_cache = kmem_cache_create("xfs_log_ticket",
2014 sizeof(struct xlog_ticket),
2016 if (!xfs_log_ticket_cache)
2017 goto out_destroy_buf_cache;
2019 error = xfs_btree_init_cur_caches();
2021 goto out_destroy_log_ticket_cache;
2023 error = xfs_defer_init_item_caches();
2025 goto out_destroy_btree_cur_cache;
2027 xfs_da_state_cache = kmem_cache_create("xfs_da_state",
2028 sizeof(struct xfs_da_state),
2030 if (!xfs_da_state_cache)
2031 goto out_destroy_defer_item_cache;
2033 xfs_ifork_cache = kmem_cache_create("xfs_ifork",
2034 sizeof(struct xfs_ifork),
2036 if (!xfs_ifork_cache)
2037 goto out_destroy_da_state_cache;
2039 xfs_trans_cache = kmem_cache_create("xfs_trans",
2040 sizeof(struct xfs_trans),
2042 if (!xfs_trans_cache)
2043 goto out_destroy_ifork_cache;
2047 * The size of the cache-allocated buf log item is the maximum
2048 * size possible under XFS. This wastes a little bit of memory,
2049 * but it is much faster.
2051 xfs_buf_item_cache = kmem_cache_create("xfs_buf_item",
2052 sizeof(struct xfs_buf_log_item),
2054 if (!xfs_buf_item_cache)
2055 goto out_destroy_trans_cache;
2057 xfs_efd_cache = kmem_cache_create("xfs_efd_item",
2058 xfs_efd_log_item_sizeof(XFS_EFD_MAX_FAST_EXTENTS),
2061 goto out_destroy_buf_item_cache;
2063 xfs_efi_cache = kmem_cache_create("xfs_efi_item",
2064 xfs_efi_log_item_sizeof(XFS_EFI_MAX_FAST_EXTENTS),
2067 goto out_destroy_efd_cache;
2069 xfs_inode_cache = kmem_cache_create("xfs_inode",
2070 sizeof(struct xfs_inode), 0,
2071 (SLAB_HWCACHE_ALIGN |
2072 SLAB_RECLAIM_ACCOUNT |
2073 SLAB_MEM_SPREAD | SLAB_ACCOUNT),
2074 xfs_fs_inode_init_once);
2075 if (!xfs_inode_cache)
2076 goto out_destroy_efi_cache;
2078 xfs_ili_cache = kmem_cache_create("xfs_ili",
2079 sizeof(struct xfs_inode_log_item), 0,
2080 SLAB_RECLAIM_ACCOUNT | SLAB_MEM_SPREAD,
2083 goto out_destroy_inode_cache;
2085 xfs_icreate_cache = kmem_cache_create("xfs_icr",
2086 sizeof(struct xfs_icreate_item),
2088 if (!xfs_icreate_cache)
2089 goto out_destroy_ili_cache;
2091 xfs_rud_cache = kmem_cache_create("xfs_rud_item",
2092 sizeof(struct xfs_rud_log_item),
2095 goto out_destroy_icreate_cache;
2097 xfs_rui_cache = kmem_cache_create("xfs_rui_item",
2098 xfs_rui_log_item_sizeof(XFS_RUI_MAX_FAST_EXTENTS),
2101 goto out_destroy_rud_cache;
2103 xfs_cud_cache = kmem_cache_create("xfs_cud_item",
2104 sizeof(struct xfs_cud_log_item),
2107 goto out_destroy_rui_cache;
2109 xfs_cui_cache = kmem_cache_create("xfs_cui_item",
2110 xfs_cui_log_item_sizeof(XFS_CUI_MAX_FAST_EXTENTS),
2113 goto out_destroy_cud_cache;
2115 xfs_bud_cache = kmem_cache_create("xfs_bud_item",
2116 sizeof(struct xfs_bud_log_item),
2119 goto out_destroy_cui_cache;
2121 xfs_bui_cache = kmem_cache_create("xfs_bui_item",
2122 xfs_bui_log_item_sizeof(XFS_BUI_MAX_FAST_EXTENTS),
2125 goto out_destroy_bud_cache;
2127 xfs_attrd_cache = kmem_cache_create("xfs_attrd_item",
2128 sizeof(struct xfs_attrd_log_item),
2130 if (!xfs_attrd_cache)
2131 goto out_destroy_bui_cache;
2133 xfs_attri_cache = kmem_cache_create("xfs_attri_item",
2134 sizeof(struct xfs_attri_log_item),
2136 if (!xfs_attri_cache)
2137 goto out_destroy_attrd_cache;
2139 xfs_iunlink_cache = kmem_cache_create("xfs_iul_item",
2140 sizeof(struct xfs_iunlink_item),
2142 if (!xfs_iunlink_cache)
2143 goto out_destroy_attri_cache;
2147 out_destroy_attri_cache:
2148 kmem_cache_destroy(xfs_attri_cache);
2149 out_destroy_attrd_cache:
2150 kmem_cache_destroy(xfs_attrd_cache);
2151 out_destroy_bui_cache:
2152 kmem_cache_destroy(xfs_bui_cache);
2153 out_destroy_bud_cache:
2154 kmem_cache_destroy(xfs_bud_cache);
2155 out_destroy_cui_cache:
2156 kmem_cache_destroy(xfs_cui_cache);
2157 out_destroy_cud_cache:
2158 kmem_cache_destroy(xfs_cud_cache);
2159 out_destroy_rui_cache:
2160 kmem_cache_destroy(xfs_rui_cache);
2161 out_destroy_rud_cache:
2162 kmem_cache_destroy(xfs_rud_cache);
2163 out_destroy_icreate_cache:
2164 kmem_cache_destroy(xfs_icreate_cache);
2165 out_destroy_ili_cache:
2166 kmem_cache_destroy(xfs_ili_cache);
2167 out_destroy_inode_cache:
2168 kmem_cache_destroy(xfs_inode_cache);
2169 out_destroy_efi_cache:
2170 kmem_cache_destroy(xfs_efi_cache);
2171 out_destroy_efd_cache:
2172 kmem_cache_destroy(xfs_efd_cache);
2173 out_destroy_buf_item_cache:
2174 kmem_cache_destroy(xfs_buf_item_cache);
2175 out_destroy_trans_cache:
2176 kmem_cache_destroy(xfs_trans_cache);
2177 out_destroy_ifork_cache:
2178 kmem_cache_destroy(xfs_ifork_cache);
2179 out_destroy_da_state_cache:
2180 kmem_cache_destroy(xfs_da_state_cache);
2181 out_destroy_defer_item_cache:
2182 xfs_defer_destroy_item_caches();
2183 out_destroy_btree_cur_cache:
2184 xfs_btree_destroy_cur_caches();
2185 out_destroy_log_ticket_cache:
2186 kmem_cache_destroy(xfs_log_ticket_cache);
2187 out_destroy_buf_cache:
2188 kmem_cache_destroy(xfs_buf_cache);
2194 xfs_destroy_caches(void)
2197 * Make sure all delayed rcu free are flushed before we
2201 kmem_cache_destroy(xfs_iunlink_cache);
2202 kmem_cache_destroy(xfs_attri_cache);
2203 kmem_cache_destroy(xfs_attrd_cache);
2204 kmem_cache_destroy(xfs_bui_cache);
2205 kmem_cache_destroy(xfs_bud_cache);
2206 kmem_cache_destroy(xfs_cui_cache);
2207 kmem_cache_destroy(xfs_cud_cache);
2208 kmem_cache_destroy(xfs_rui_cache);
2209 kmem_cache_destroy(xfs_rud_cache);
2210 kmem_cache_destroy(xfs_icreate_cache);
2211 kmem_cache_destroy(xfs_ili_cache);
2212 kmem_cache_destroy(xfs_inode_cache);
2213 kmem_cache_destroy(xfs_efi_cache);
2214 kmem_cache_destroy(xfs_efd_cache);
2215 kmem_cache_destroy(xfs_buf_item_cache);
2216 kmem_cache_destroy(xfs_trans_cache);
2217 kmem_cache_destroy(xfs_ifork_cache);
2218 kmem_cache_destroy(xfs_da_state_cache);
2219 xfs_defer_destroy_item_caches();
2220 xfs_btree_destroy_cur_caches();
2221 kmem_cache_destroy(xfs_log_ticket_cache);
2222 kmem_cache_destroy(xfs_buf_cache);
2226 xfs_init_workqueues(void)
2229 * The allocation workqueue can be used in memory reclaim situations
2230 * (writepage path), and parallelism is only limited by the number of
2231 * AGs in all the filesystems mounted. Hence use the default large
2232 * max_active value for this workqueue.
2234 xfs_alloc_wq = alloc_workqueue("xfsalloc",
2235 XFS_WQFLAGS(WQ_MEM_RECLAIM | WQ_FREEZABLE), 0);
2239 xfs_discard_wq = alloc_workqueue("xfsdiscard", XFS_WQFLAGS(WQ_UNBOUND),
2241 if (!xfs_discard_wq)
2242 goto out_free_alloc_wq;
2246 destroy_workqueue(xfs_alloc_wq);
2251 xfs_destroy_workqueues(void)
2253 destroy_workqueue(xfs_discard_wq);
2254 destroy_workqueue(xfs_alloc_wq);
2257 #ifdef CONFIG_HOTPLUG_CPU
2262 struct xfs_mount *mp, *n;
2264 spin_lock(&xfs_mount_list_lock);
2265 list_for_each_entry_safe(mp, n, &xfs_mount_list, m_mount_list) {
2266 spin_unlock(&xfs_mount_list_lock);
2267 xfs_inodegc_cpu_dead(mp, cpu);
2268 xlog_cil_pcp_dead(mp->m_log, cpu);
2269 spin_lock(&xfs_mount_list_lock);
2271 spin_unlock(&xfs_mount_list_lock);
2276 xfs_cpu_hotplug_init(void)
2280 error = cpuhp_setup_state_nocalls(CPUHP_XFS_DEAD, "xfs:dead", NULL,
2284 "Failed to initialise CPU hotplug, error %d. XFS is non-functional.",
2290 xfs_cpu_hotplug_destroy(void)
2292 cpuhp_remove_state_nocalls(CPUHP_XFS_DEAD);
2295 #else /* !CONFIG_HOTPLUG_CPU */
2296 static inline int xfs_cpu_hotplug_init(void) { return 0; }
2297 static inline void xfs_cpu_hotplug_destroy(void) {}
2305 xfs_check_ondisk_structs();
2307 error = xfs_dahash_test();
2311 printk(KERN_INFO XFS_VERSION_STRING " with "
2312 XFS_BUILD_OPTIONS " enabled\n");
2316 error = xfs_cpu_hotplug_init();
2320 error = xfs_init_caches();
2322 goto out_destroy_hp;
2324 error = xfs_init_workqueues();
2326 goto out_destroy_caches;
2328 error = xfs_mru_cache_init();
2330 goto out_destroy_wq;
2332 error = xfs_init_procfs();
2334 goto out_mru_cache_uninit;
2336 error = xfs_sysctl_register();
2338 goto out_cleanup_procfs;
2340 xfs_kset = kset_create_and_add("xfs", NULL, fs_kobj);
2343 goto out_sysctl_unregister;
2346 xfsstats.xs_kobj.kobject.kset = xfs_kset;
2348 xfsstats.xs_stats = alloc_percpu(struct xfsstats);
2349 if (!xfsstats.xs_stats) {
2351 goto out_kset_unregister;
2354 error = xfs_sysfs_init(&xfsstats.xs_kobj, &xfs_stats_ktype, NULL,
2357 goto out_free_stats;
2360 xfs_dbg_kobj.kobject.kset = xfs_kset;
2361 error = xfs_sysfs_init(&xfs_dbg_kobj, &xfs_dbg_ktype, NULL, "debug");
2363 goto out_remove_stats_kobj;
2366 error = xfs_qm_init();
2368 goto out_remove_dbg_kobj;
2370 error = register_filesystem(&xfs_fs_type);
2377 out_remove_dbg_kobj:
2379 xfs_sysfs_del(&xfs_dbg_kobj);
2380 out_remove_stats_kobj:
2382 xfs_sysfs_del(&xfsstats.xs_kobj);
2384 free_percpu(xfsstats.xs_stats);
2385 out_kset_unregister:
2386 kset_unregister(xfs_kset);
2387 out_sysctl_unregister:
2388 xfs_sysctl_unregister();
2390 xfs_cleanup_procfs();
2391 out_mru_cache_uninit:
2392 xfs_mru_cache_uninit();
2394 xfs_destroy_workqueues();
2396 xfs_destroy_caches();
2398 xfs_cpu_hotplug_destroy();
2407 unregister_filesystem(&xfs_fs_type);
2409 xfs_sysfs_del(&xfs_dbg_kobj);
2411 xfs_sysfs_del(&xfsstats.xs_kobj);
2412 free_percpu(xfsstats.xs_stats);
2413 kset_unregister(xfs_kset);
2414 xfs_sysctl_unregister();
2415 xfs_cleanup_procfs();
2416 xfs_mru_cache_uninit();
2417 xfs_destroy_workqueues();
2418 xfs_destroy_caches();
2419 xfs_uuid_table_free();
2420 xfs_cpu_hotplug_destroy();
2423 module_init(init_xfs_fs);
2424 module_exit(exit_xfs_fs);
2426 MODULE_AUTHOR("Silicon Graphics, Inc.");
2427 MODULE_DESCRIPTION(XFS_VERSION_STRING " with " XFS_BUILD_OPTIONS " enabled");
2428 MODULE_LICENSE("GPL");