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"
39 #include <linux/magic.h>
40 #include <linux/fs_context.h>
41 #include <linux/fs_parser.h>
43 static const struct super_operations xfs_super_operations;
45 static struct kset *xfs_kset; /* top-level xfs sysfs dir */
47 static struct xfs_kobj xfs_dbg_kobj; /* global debug sysfs attrs */
51 * Table driven mount option parser.
54 Opt_logbufs, Opt_logbsize, Opt_logdev, Opt_rtdev,
55 Opt_wsync, Opt_noalign, Opt_swalloc, Opt_sunit, Opt_swidth, Opt_nouuid,
56 Opt_grpid, Opt_nogrpid, Opt_bsdgroups, Opt_sysvgroups,
57 Opt_allocsize, Opt_norecovery, Opt_inode64, Opt_inode32, Opt_ikeep,
58 Opt_noikeep, Opt_largeio, Opt_nolargeio, Opt_attr2, Opt_noattr2,
59 Opt_filestreams, Opt_quota, Opt_noquota, Opt_usrquota, Opt_grpquota,
60 Opt_prjquota, Opt_uquota, Opt_gquota, Opt_pquota,
61 Opt_uqnoenforce, Opt_gqnoenforce, Opt_pqnoenforce, Opt_qnoenforce,
62 Opt_discard, Opt_nodiscard, Opt_dax,
65 static const struct fs_parameter_spec xfs_param_specs[] = {
66 fsparam_u32("logbufs", Opt_logbufs),
67 fsparam_string("logbsize", Opt_logbsize),
68 fsparam_string("logdev", Opt_logdev),
69 fsparam_string("rtdev", Opt_rtdev),
70 fsparam_flag("wsync", Opt_wsync),
71 fsparam_flag("noalign", Opt_noalign),
72 fsparam_flag("swalloc", Opt_swalloc),
73 fsparam_u32("sunit", Opt_sunit),
74 fsparam_u32("swidth", Opt_swidth),
75 fsparam_flag("nouuid", Opt_nouuid),
76 fsparam_flag("grpid", Opt_grpid),
77 fsparam_flag("nogrpid", Opt_nogrpid),
78 fsparam_flag("bsdgroups", Opt_bsdgroups),
79 fsparam_flag("sysvgroups", Opt_sysvgroups),
80 fsparam_string("allocsize", Opt_allocsize),
81 fsparam_flag("norecovery", Opt_norecovery),
82 fsparam_flag("inode64", Opt_inode64),
83 fsparam_flag("inode32", Opt_inode32),
84 fsparam_flag("ikeep", Opt_ikeep),
85 fsparam_flag("noikeep", Opt_noikeep),
86 fsparam_flag("largeio", Opt_largeio),
87 fsparam_flag("nolargeio", Opt_nolargeio),
88 fsparam_flag("attr2", Opt_attr2),
89 fsparam_flag("noattr2", Opt_noattr2),
90 fsparam_flag("filestreams", Opt_filestreams),
91 fsparam_flag("quota", Opt_quota),
92 fsparam_flag("noquota", Opt_noquota),
93 fsparam_flag("usrquota", Opt_usrquota),
94 fsparam_flag("grpquota", Opt_grpquota),
95 fsparam_flag("prjquota", Opt_prjquota),
96 fsparam_flag("uquota", Opt_uquota),
97 fsparam_flag("gquota", Opt_gquota),
98 fsparam_flag("pquota", Opt_pquota),
99 fsparam_flag("uqnoenforce", Opt_uqnoenforce),
100 fsparam_flag("gqnoenforce", Opt_gqnoenforce),
101 fsparam_flag("pqnoenforce", Opt_pqnoenforce),
102 fsparam_flag("qnoenforce", Opt_qnoenforce),
103 fsparam_flag("discard", Opt_discard),
104 fsparam_flag("nodiscard", Opt_nodiscard),
105 fsparam_flag("dax", Opt_dax),
109 static const struct fs_parameter_description xfs_fs_parameters = {
111 .specs = xfs_param_specs,
114 struct proc_xfs_info {
124 static struct proc_xfs_info xfs_info_set[] = {
125 /* the few simple ones we can get from the mount struct */
126 { XFS_MOUNT_IKEEP, ",ikeep" },
127 { XFS_MOUNT_WSYNC, ",wsync" },
128 { XFS_MOUNT_NOALIGN, ",noalign" },
129 { XFS_MOUNT_SWALLOC, ",swalloc" },
130 { XFS_MOUNT_NOUUID, ",nouuid" },
131 { XFS_MOUNT_NORECOVERY, ",norecovery" },
132 { XFS_MOUNT_ATTR2, ",attr2" },
133 { XFS_MOUNT_FILESTREAMS, ",filestreams" },
134 { XFS_MOUNT_GRPID, ",grpid" },
135 { XFS_MOUNT_DISCARD, ",discard" },
136 { XFS_MOUNT_LARGEIO, ",largeio" },
137 { XFS_MOUNT_DAX, ",dax" },
140 struct xfs_mount *mp = XFS_M(root->d_sb);
141 struct proc_xfs_info *xfs_infop;
143 for (xfs_infop = xfs_info_set; xfs_infop->flag; xfs_infop++) {
144 if (mp->m_flags & xfs_infop->flag)
145 seq_puts(m, xfs_infop->str);
148 seq_printf(m, ",inode%d",
149 (mp->m_flags & XFS_MOUNT_SMALL_INUMS) ? 32 : 64);
151 if (mp->m_flags & XFS_MOUNT_ALLOCSIZE)
152 seq_printf(m, ",allocsize=%dk",
153 (1 << mp->m_allocsize_log) >> 10);
155 if (mp->m_logbufs > 0)
156 seq_printf(m, ",logbufs=%d", mp->m_logbufs);
157 if (mp->m_logbsize > 0)
158 seq_printf(m, ",logbsize=%dk", mp->m_logbsize >> 10);
161 seq_show_option(m, "logdev", mp->m_logname);
163 seq_show_option(m, "rtdev", mp->m_rtname);
165 if (mp->m_dalign > 0)
166 seq_printf(m, ",sunit=%d",
167 (int)XFS_FSB_TO_BB(mp, mp->m_dalign));
168 if (mp->m_swidth > 0)
169 seq_printf(m, ",swidth=%d",
170 (int)XFS_FSB_TO_BB(mp, mp->m_swidth));
172 if (mp->m_qflags & (XFS_UQUOTA_ACCT|XFS_UQUOTA_ENFD))
173 seq_puts(m, ",usrquota");
174 else if (mp->m_qflags & XFS_UQUOTA_ACCT)
175 seq_puts(m, ",uqnoenforce");
177 if (mp->m_qflags & XFS_PQUOTA_ACCT) {
178 if (mp->m_qflags & XFS_PQUOTA_ENFD)
179 seq_puts(m, ",prjquota");
181 seq_puts(m, ",pqnoenforce");
183 if (mp->m_qflags & XFS_GQUOTA_ACCT) {
184 if (mp->m_qflags & XFS_GQUOTA_ENFD)
185 seq_puts(m, ",grpquota");
187 seq_puts(m, ",gqnoenforce");
190 if (!(mp->m_qflags & XFS_ALL_QUOTA_ACCT))
191 seq_puts(m, ",noquota");
198 unsigned int blockshift)
200 unsigned int pagefactor = 1;
201 unsigned int bitshift = BITS_PER_LONG - 1;
203 /* Figure out maximum filesize, on Linux this can depend on
204 * the filesystem blocksize (on 32 bit platforms).
205 * __block_write_begin does this in an [unsigned] long long...
206 * page->index << (PAGE_SHIFT - bbits)
207 * So, for page sized blocks (4K on 32 bit platforms),
208 * this wraps at around 8Tb (hence MAX_LFS_FILESIZE which is
209 * (((u64)PAGE_SIZE << (BITS_PER_LONG-1))-1)
210 * but for smaller blocksizes it is less (bbits = log2 bsize).
213 #if BITS_PER_LONG == 32
214 ASSERT(sizeof(sector_t) == 8);
215 pagefactor = PAGE_SIZE;
216 bitshift = BITS_PER_LONG;
219 return (((uint64_t)pagefactor) << bitshift) - 1;
223 * Set parameters for inode allocation heuristics, taking into account
224 * filesystem size and inode32/inode64 mount options; i.e. specifically
225 * whether or not XFS_MOUNT_SMALL_INUMS is set.
227 * Inode allocation patterns are altered only if inode32 is requested
228 * (XFS_MOUNT_SMALL_INUMS), and the filesystem is sufficiently large.
229 * If altered, XFS_MOUNT_32BITINODES is set as well.
231 * An agcount independent of that in the mount structure is provided
232 * because in the growfs case, mp->m_sb.sb_agcount is not yet updated
233 * to the potentially higher ag count.
235 * Returns the maximum AG index which may contain inodes.
239 struct xfs_mount *mp,
240 xfs_agnumber_t agcount)
242 xfs_agnumber_t index;
243 xfs_agnumber_t maxagi = 0;
244 xfs_sb_t *sbp = &mp->m_sb;
245 xfs_agnumber_t max_metadata;
250 * Calculate how much should be reserved for inodes to meet
251 * the max inode percentage. Used only for inode32.
253 if (M_IGEO(mp)->maxicount) {
256 icount = sbp->sb_dblocks * sbp->sb_imax_pct;
258 icount += sbp->sb_agblocks - 1;
259 do_div(icount, sbp->sb_agblocks);
260 max_metadata = icount;
262 max_metadata = agcount;
265 /* Get the last possible inode in the filesystem */
266 agino = XFS_AGB_TO_AGINO(mp, sbp->sb_agblocks - 1);
267 ino = XFS_AGINO_TO_INO(mp, agcount - 1, agino);
270 * If user asked for no more than 32-bit inodes, and the fs is
271 * sufficiently large, set XFS_MOUNT_32BITINODES if we must alter
272 * the allocator to accommodate the request.
274 if ((mp->m_flags & XFS_MOUNT_SMALL_INUMS) && ino > XFS_MAXINUMBER_32)
275 mp->m_flags |= XFS_MOUNT_32BITINODES;
277 mp->m_flags &= ~XFS_MOUNT_32BITINODES;
279 for (index = 0; index < agcount; index++) {
280 struct xfs_perag *pag;
282 ino = XFS_AGINO_TO_INO(mp, index, agino);
284 pag = xfs_perag_get(mp, index);
286 if (mp->m_flags & XFS_MOUNT_32BITINODES) {
287 if (ino > XFS_MAXINUMBER_32) {
288 pag->pagi_inodeok = 0;
289 pag->pagf_metadata = 0;
291 pag->pagi_inodeok = 1;
293 if (index < max_metadata)
294 pag->pagf_metadata = 1;
296 pag->pagf_metadata = 0;
299 pag->pagi_inodeok = 1;
300 pag->pagf_metadata = 0;
306 return (mp->m_flags & XFS_MOUNT_32BITINODES) ? maxagi : agcount;
313 struct block_device **bdevp)
317 *bdevp = blkdev_get_by_path(name, FMODE_READ|FMODE_WRITE|FMODE_EXCL,
319 if (IS_ERR(*bdevp)) {
320 error = PTR_ERR(*bdevp);
321 xfs_warn(mp, "Invalid device [%s], error=%d", name, error);
329 struct block_device *bdev)
332 blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL);
336 xfs_blkdev_issue_flush(
337 xfs_buftarg_t *buftarg)
339 blkdev_issue_flush(buftarg->bt_bdev, GFP_NOFS, NULL);
344 struct xfs_mount *mp)
346 struct dax_device *dax_ddev = mp->m_ddev_targp->bt_daxdev;
348 if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp) {
349 struct block_device *logdev = mp->m_logdev_targp->bt_bdev;
350 struct dax_device *dax_logdev = mp->m_logdev_targp->bt_daxdev;
352 xfs_free_buftarg(mp->m_logdev_targp);
353 xfs_blkdev_put(logdev);
354 fs_put_dax(dax_logdev);
356 if (mp->m_rtdev_targp) {
357 struct block_device *rtdev = mp->m_rtdev_targp->bt_bdev;
358 struct dax_device *dax_rtdev = mp->m_rtdev_targp->bt_daxdev;
360 xfs_free_buftarg(mp->m_rtdev_targp);
361 xfs_blkdev_put(rtdev);
362 fs_put_dax(dax_rtdev);
364 xfs_free_buftarg(mp->m_ddev_targp);
365 fs_put_dax(dax_ddev);
369 * The file system configurations are:
370 * (1) device (partition) with data and internal log
371 * (2) logical volume with data and log subvolumes.
372 * (3) logical volume with data, log, and realtime subvolumes.
374 * We only have to handle opening the log and realtime volumes here if
375 * they are present. The data subvolume has already been opened by
376 * get_sb_bdev() and is stored in sb->s_bdev.
380 struct xfs_mount *mp)
382 struct block_device *ddev = mp->m_super->s_bdev;
383 struct dax_device *dax_ddev = fs_dax_get_by_bdev(ddev);
384 struct dax_device *dax_logdev = NULL, *dax_rtdev = NULL;
385 struct block_device *logdev = NULL, *rtdev = NULL;
389 * Open real time and log devices - order is important.
392 error = xfs_blkdev_get(mp, mp->m_logname, &logdev);
395 dax_logdev = fs_dax_get_by_bdev(logdev);
399 error = xfs_blkdev_get(mp, mp->m_rtname, &rtdev);
401 goto out_close_logdev;
403 if (rtdev == ddev || rtdev == logdev) {
405 "Cannot mount filesystem with identical rtdev and ddev/logdev.");
407 goto out_close_rtdev;
409 dax_rtdev = fs_dax_get_by_bdev(rtdev);
413 * Setup xfs_mount buffer target pointers
416 mp->m_ddev_targp = xfs_alloc_buftarg(mp, ddev, dax_ddev);
417 if (!mp->m_ddev_targp)
418 goto out_close_rtdev;
421 mp->m_rtdev_targp = xfs_alloc_buftarg(mp, rtdev, dax_rtdev);
422 if (!mp->m_rtdev_targp)
423 goto out_free_ddev_targ;
426 if (logdev && logdev != ddev) {
427 mp->m_logdev_targp = xfs_alloc_buftarg(mp, logdev, dax_logdev);
428 if (!mp->m_logdev_targp)
429 goto out_free_rtdev_targ;
431 mp->m_logdev_targp = mp->m_ddev_targp;
437 if (mp->m_rtdev_targp)
438 xfs_free_buftarg(mp->m_rtdev_targp);
440 xfs_free_buftarg(mp->m_ddev_targp);
442 xfs_blkdev_put(rtdev);
443 fs_put_dax(dax_rtdev);
445 if (logdev && logdev != ddev) {
446 xfs_blkdev_put(logdev);
447 fs_put_dax(dax_logdev);
450 fs_put_dax(dax_ddev);
455 * Setup xfs_mount buffer target pointers based on superblock
459 struct xfs_mount *mp)
463 error = xfs_setsize_buftarg(mp->m_ddev_targp, mp->m_sb.sb_sectsize);
467 if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp) {
468 unsigned int log_sector_size = BBSIZE;
470 if (xfs_sb_version_hassector(&mp->m_sb))
471 log_sector_size = mp->m_sb.sb_logsectsize;
472 error = xfs_setsize_buftarg(mp->m_logdev_targp,
477 if (mp->m_rtdev_targp) {
478 error = xfs_setsize_buftarg(mp->m_rtdev_targp,
479 mp->m_sb.sb_sectsize);
488 xfs_init_mount_workqueues(
489 struct xfs_mount *mp)
491 mp->m_buf_workqueue = alloc_workqueue("xfs-buf/%s",
492 WQ_MEM_RECLAIM|WQ_FREEZABLE, 1, mp->m_super->s_id);
493 if (!mp->m_buf_workqueue)
496 mp->m_unwritten_workqueue = alloc_workqueue("xfs-conv/%s",
497 WQ_MEM_RECLAIM|WQ_FREEZABLE, 0, mp->m_super->s_id);
498 if (!mp->m_unwritten_workqueue)
499 goto out_destroy_buf;
501 mp->m_cil_workqueue = alloc_workqueue("xfs-cil/%s",
502 WQ_MEM_RECLAIM | WQ_FREEZABLE | WQ_UNBOUND,
503 0, mp->m_super->s_id);
504 if (!mp->m_cil_workqueue)
505 goto out_destroy_unwritten;
507 mp->m_reclaim_workqueue = alloc_workqueue("xfs-reclaim/%s",
508 WQ_MEM_RECLAIM|WQ_FREEZABLE, 0, mp->m_super->s_id);
509 if (!mp->m_reclaim_workqueue)
510 goto out_destroy_cil;
512 mp->m_eofblocks_workqueue = alloc_workqueue("xfs-eofblocks/%s",
513 WQ_MEM_RECLAIM|WQ_FREEZABLE, 0, mp->m_super->s_id);
514 if (!mp->m_eofblocks_workqueue)
515 goto out_destroy_reclaim;
517 mp->m_sync_workqueue = alloc_workqueue("xfs-sync/%s", WQ_FREEZABLE, 0,
519 if (!mp->m_sync_workqueue)
520 goto out_destroy_eofb;
525 destroy_workqueue(mp->m_eofblocks_workqueue);
527 destroy_workqueue(mp->m_reclaim_workqueue);
529 destroy_workqueue(mp->m_cil_workqueue);
530 out_destroy_unwritten:
531 destroy_workqueue(mp->m_unwritten_workqueue);
533 destroy_workqueue(mp->m_buf_workqueue);
539 xfs_destroy_mount_workqueues(
540 struct xfs_mount *mp)
542 destroy_workqueue(mp->m_sync_workqueue);
543 destroy_workqueue(mp->m_eofblocks_workqueue);
544 destroy_workqueue(mp->m_reclaim_workqueue);
545 destroy_workqueue(mp->m_cil_workqueue);
546 destroy_workqueue(mp->m_unwritten_workqueue);
547 destroy_workqueue(mp->m_buf_workqueue);
551 * Flush all dirty data to disk. Must not be called while holding an XFS_ILOCK
552 * or a page lock. We use sync_inodes_sb() here to ensure we block while waiting
553 * for IO to complete so that we effectively throttle multiple callers to the
554 * rate at which IO is completing.
558 struct xfs_mount *mp)
560 struct super_block *sb = mp->m_super;
562 if (down_read_trylock(&sb->s_umount)) {
564 up_read(&sb->s_umount);
568 /* Catch misguided souls that try to use this interface on XFS */
569 STATIC struct inode *
571 struct super_block *sb)
580 struct xfs_inode *ip,
583 struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, whichfork);
584 struct xfs_bmbt_irec got;
585 struct xfs_iext_cursor icur;
587 if (!ifp || !xfs_iext_lookup_extent(ip, ifp, 0, &icur, &got))
590 if (isnullstartblock(got.br_startblock)) {
591 xfs_warn(ip->i_mount,
592 "ino %llx %s fork has delalloc extent at [0x%llx:0x%llx]",
594 whichfork == XFS_DATA_FORK ? "data" : "cow",
595 got.br_startoff, got.br_blockcount);
597 } while (xfs_iext_next_extent(ifp, &icur, &got));
600 #define xfs_check_delalloc(ip, whichfork) do { } while (0)
604 * Now that the generic code is guaranteed not to be accessing
605 * the linux inode, we can inactivate and reclaim the inode.
608 xfs_fs_destroy_inode(
611 struct xfs_inode *ip = XFS_I(inode);
613 trace_xfs_destroy_inode(ip);
615 ASSERT(!rwsem_is_locked(&inode->i_rwsem));
616 XFS_STATS_INC(ip->i_mount, vn_rele);
617 XFS_STATS_INC(ip->i_mount, vn_remove);
621 if (!XFS_FORCED_SHUTDOWN(ip->i_mount) && ip->i_delayed_blks) {
622 xfs_check_delalloc(ip, XFS_DATA_FORK);
623 xfs_check_delalloc(ip, XFS_COW_FORK);
627 XFS_STATS_INC(ip->i_mount, vn_reclaim);
630 * We should never get here with one of the reclaim flags already set.
632 ASSERT_ALWAYS(!xfs_iflags_test(ip, XFS_IRECLAIMABLE));
633 ASSERT_ALWAYS(!xfs_iflags_test(ip, XFS_IRECLAIM));
636 * We always use background reclaim here because even if the
637 * inode is clean, it still may be under IO and hence we have
638 * to take the flush lock. The background reclaim path handles
639 * this more efficiently than we can here, so simply let background
640 * reclaim tear down all inodes.
642 xfs_inode_set_reclaim_tag(ip);
650 struct xfs_inode *ip = XFS_I(inode);
651 struct xfs_mount *mp = ip->i_mount;
652 struct xfs_trans *tp;
654 if (!(inode->i_sb->s_flags & SB_LAZYTIME))
656 if (flag != I_DIRTY_SYNC || !(inode->i_state & I_DIRTY_TIME))
659 if (xfs_trans_alloc(mp, &M_RES(mp)->tr_fsyncts, 0, 0, 0, &tp))
661 xfs_ilock(ip, XFS_ILOCK_EXCL);
662 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
663 xfs_trans_log_inode(tp, ip, XFS_ILOG_TIMESTAMP);
664 xfs_trans_commit(tp);
668 * Slab object creation initialisation for the XFS inode.
669 * This covers only the idempotent fields in the XFS inode;
670 * all other fields need to be initialised on allocation
671 * from the slab. This avoids the need to repeatedly initialise
672 * fields in the xfs inode that left in the initialise state
673 * when freeing the inode.
676 xfs_fs_inode_init_once(
679 struct xfs_inode *ip = inode;
681 memset(ip, 0, sizeof(struct xfs_inode));
684 inode_init_once(VFS_I(ip));
687 atomic_set(&ip->i_pincount, 0);
688 spin_lock_init(&ip->i_flags_lock);
690 mrlock_init(&ip->i_mmaplock, MRLOCK_ALLOW_EQUAL_PRI|MRLOCK_BARRIER,
691 "xfsino", ip->i_ino);
692 mrlock_init(&ip->i_lock, MRLOCK_ALLOW_EQUAL_PRI|MRLOCK_BARRIER,
693 "xfsino", ip->i_ino);
697 * We do an unlocked check for XFS_IDONTCACHE here because we are already
698 * serialised against cache hits here via the inode->i_lock and igrab() in
699 * xfs_iget_cache_hit(). Hence a lookup that might clear this flag will not be
700 * racing with us, and it avoids needing to grab a spinlock here for every inode
701 * we drop the final reference on.
707 struct xfs_inode *ip = XFS_I(inode);
710 * If this unlinked inode is in the middle of recovery, don't
711 * drop the inode just yet; log recovery will take care of
712 * that. See the comment for this inode flag.
714 if (ip->i_flags & XFS_IRECOVERY) {
715 ASSERT(ip->i_mount->m_log->l_flags & XLOG_RECOVERY_NEEDED);
719 return generic_drop_inode(inode) || (ip->i_flags & XFS_IDONTCACHE);
724 struct xfs_mount *mp)
727 kfree(mp->m_logname);
733 struct super_block *sb,
736 struct xfs_mount *mp = XFS_M(sb);
739 * Doing anything during the async pass would be counterproductive.
744 xfs_log_force(mp, XFS_LOG_SYNC);
747 * The disk must be active because we're syncing.
748 * We schedule log work now (now that the disk is
749 * active) instead of later (when it might not be).
751 flush_delayed_work(&mp->m_log->l_work);
759 struct dentry *dentry,
760 struct kstatfs *statp)
762 struct xfs_mount *mp = XFS_M(dentry->d_sb);
763 xfs_sb_t *sbp = &mp->m_sb;
764 struct xfs_inode *ip = XFS_I(d_inode(dentry));
765 uint64_t fakeinos, id;
772 statp->f_type = XFS_SUPER_MAGIC;
773 statp->f_namelen = MAXNAMELEN - 1;
775 id = huge_encode_dev(mp->m_ddev_targp->bt_dev);
776 statp->f_fsid.val[0] = (u32)id;
777 statp->f_fsid.val[1] = (u32)(id >> 32);
779 icount = percpu_counter_sum(&mp->m_icount);
780 ifree = percpu_counter_sum(&mp->m_ifree);
781 fdblocks = percpu_counter_sum(&mp->m_fdblocks);
783 spin_lock(&mp->m_sb_lock);
784 statp->f_bsize = sbp->sb_blocksize;
785 lsize = sbp->sb_logstart ? sbp->sb_logblocks : 0;
786 statp->f_blocks = sbp->sb_dblocks - lsize;
787 spin_unlock(&mp->m_sb_lock);
789 statp->f_bfree = fdblocks - mp->m_alloc_set_aside;
790 statp->f_bavail = statp->f_bfree;
792 fakeinos = XFS_FSB_TO_INO(mp, statp->f_bfree);
793 statp->f_files = min(icount + fakeinos, (uint64_t)XFS_MAXINUMBER);
794 if (M_IGEO(mp)->maxicount)
795 statp->f_files = min_t(typeof(statp->f_files),
797 M_IGEO(mp)->maxicount);
799 /* If sb_icount overshot maxicount, report actual allocation */
800 statp->f_files = max_t(typeof(statp->f_files),
804 /* make sure statp->f_ffree does not underflow */
805 ffree = statp->f_files - (icount - ifree);
806 statp->f_ffree = max_t(int64_t, ffree, 0);
809 if ((ip->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) &&
810 ((mp->m_qflags & (XFS_PQUOTA_ACCT|XFS_PQUOTA_ENFD))) ==
811 (XFS_PQUOTA_ACCT|XFS_PQUOTA_ENFD))
812 xfs_qm_statvfs(ip, statp);
814 if (XFS_IS_REALTIME_MOUNT(mp) &&
815 (ip->i_d.di_flags & (XFS_DIFLAG_RTINHERIT | XFS_DIFLAG_REALTIME))) {
816 statp->f_blocks = sbp->sb_rblocks;
817 statp->f_bavail = statp->f_bfree =
818 sbp->sb_frextents * sbp->sb_rextsize;
825 xfs_save_resvblks(struct xfs_mount *mp)
827 uint64_t resblks = 0;
829 mp->m_resblks_save = mp->m_resblks;
830 xfs_reserve_blocks(mp, &resblks, NULL);
834 xfs_restore_resvblks(struct xfs_mount *mp)
838 if (mp->m_resblks_save) {
839 resblks = mp->m_resblks_save;
840 mp->m_resblks_save = 0;
842 resblks = xfs_default_resblks(mp);
844 xfs_reserve_blocks(mp, &resblks, NULL);
848 * Trigger writeback of all the dirty metadata in the file system.
850 * This ensures that the metadata is written to their location on disk rather
851 * than just existing in transactions in the log. This means after a quiesce
852 * there is no log replay required to write the inodes to disk - this is the
853 * primary difference between a sync and a quiesce.
855 * Note: xfs_log_quiesce() stops background log work - the callers must ensure
856 * it is started again when appropriate.
860 struct xfs_mount *mp)
864 /* wait for all modifications to complete */
865 while (atomic_read(&mp->m_active_trans) > 0)
868 /* force the log to unpin objects from the now complete transactions */
869 xfs_log_force(mp, XFS_LOG_SYNC);
871 /* reclaim inodes to do any IO before the freeze completes */
872 xfs_reclaim_inodes(mp, 0);
873 xfs_reclaim_inodes(mp, SYNC_WAIT);
875 /* Push the superblock and write an unmount record */
876 error = xfs_log_sbcount(mp);
878 xfs_warn(mp, "xfs_attr_quiesce: failed to log sb changes. "
879 "Frozen image may not be consistent.");
881 * Just warn here till VFS can correctly support
882 * read-only remount without racing.
884 WARN_ON(atomic_read(&mp->m_active_trans) != 0);
890 * Second stage of a freeze. The data is already frozen so we only
891 * need to take care of the metadata. Once that's done sync the superblock
892 * to the log to dirty it in case of a crash while frozen. This ensures that we
893 * will recover the unlinked inode lists on the next mount.
897 struct super_block *sb)
899 struct xfs_mount *mp = XFS_M(sb);
901 xfs_stop_block_reaping(mp);
902 xfs_save_resvblks(mp);
903 xfs_quiesce_attr(mp);
904 return xfs_sync_sb(mp, true);
909 struct super_block *sb)
911 struct xfs_mount *mp = XFS_M(sb);
913 xfs_restore_resvblks(mp);
914 xfs_log_work_queue(mp);
915 xfs_start_block_reaping(mp);
920 * This function fills in xfs_mount_t fields based on mount args.
921 * Note: the superblock _has_ now been read in.
925 struct xfs_mount *mp)
927 int ronly = (mp->m_flags & XFS_MOUNT_RDONLY);
929 /* Fail a mount where the logbuf is smaller than the log stripe */
930 if (xfs_sb_version_haslogv2(&mp->m_sb)) {
931 if (mp->m_logbsize <= 0 &&
932 mp->m_sb.sb_logsunit > XLOG_BIG_RECORD_BSIZE) {
933 mp->m_logbsize = mp->m_sb.sb_logsunit;
934 } else if (mp->m_logbsize > 0 &&
935 mp->m_logbsize < mp->m_sb.sb_logsunit) {
937 "logbuf size must be greater than or equal to log stripe size");
941 /* Fail a mount if the logbuf is larger than 32K */
942 if (mp->m_logbsize > XLOG_BIG_RECORD_BSIZE) {
944 "logbuf size for version 1 logs must be 16K or 32K");
950 * V5 filesystems always use attr2 format for attributes.
952 if (xfs_sb_version_hascrc(&mp->m_sb) &&
953 (mp->m_flags & XFS_MOUNT_NOATTR2)) {
954 xfs_warn(mp, "Cannot mount a V5 filesystem as noattr2. "
955 "attr2 is always enabled for V5 filesystems.");
960 * mkfs'ed attr2 will turn on attr2 mount unless explicitly
961 * told by noattr2 to turn it off
963 if (xfs_sb_version_hasattr2(&mp->m_sb) &&
964 !(mp->m_flags & XFS_MOUNT_NOATTR2))
965 mp->m_flags |= XFS_MOUNT_ATTR2;
968 * prohibit r/w mounts of read-only filesystems
970 if ((mp->m_sb.sb_flags & XFS_SBF_READONLY) && !ronly) {
972 "cannot mount a read-only filesystem as read-write");
976 if ((mp->m_qflags & (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE)) &&
977 (mp->m_qflags & (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE)) &&
978 !xfs_sb_version_has_pquotino(&mp->m_sb)) {
980 "Super block does not support project and group quota together");
988 xfs_init_percpu_counters(
989 struct xfs_mount *mp)
993 error = percpu_counter_init(&mp->m_icount, 0, GFP_KERNEL);
997 error = percpu_counter_init(&mp->m_ifree, 0, GFP_KERNEL);
1001 error = percpu_counter_init(&mp->m_fdblocks, 0, GFP_KERNEL);
1005 error = percpu_counter_init(&mp->m_delalloc_blks, 0, GFP_KERNEL);
1012 percpu_counter_destroy(&mp->m_fdblocks);
1014 percpu_counter_destroy(&mp->m_ifree);
1016 percpu_counter_destroy(&mp->m_icount);
1021 xfs_reinit_percpu_counters(
1022 struct xfs_mount *mp)
1024 percpu_counter_set(&mp->m_icount, mp->m_sb.sb_icount);
1025 percpu_counter_set(&mp->m_ifree, mp->m_sb.sb_ifree);
1026 percpu_counter_set(&mp->m_fdblocks, mp->m_sb.sb_fdblocks);
1030 xfs_destroy_percpu_counters(
1031 struct xfs_mount *mp)
1033 percpu_counter_destroy(&mp->m_icount);
1034 percpu_counter_destroy(&mp->m_ifree);
1035 percpu_counter_destroy(&mp->m_fdblocks);
1036 ASSERT(XFS_FORCED_SHUTDOWN(mp) ||
1037 percpu_counter_sum(&mp->m_delalloc_blks) == 0);
1038 percpu_counter_destroy(&mp->m_delalloc_blks);
1043 struct super_block *sb)
1045 struct xfs_mount *mp = XFS_M(sb);
1047 /* if ->fill_super failed, we have no mount to tear down */
1051 xfs_notice(mp, "Unmounting Filesystem");
1052 xfs_filestream_unmount(mp);
1056 free_percpu(mp->m_stats.xs_stats);
1057 xfs_destroy_percpu_counters(mp);
1058 xfs_destroy_mount_workqueues(mp);
1059 xfs_close_devices(mp);
1061 sb->s_fs_info = NULL;
1066 xfs_fs_nr_cached_objects(
1067 struct super_block *sb,
1068 struct shrink_control *sc)
1070 /* Paranoia: catch incorrect calls during mount setup or teardown */
1071 if (WARN_ON_ONCE(!sb->s_fs_info))
1073 return xfs_reclaim_inodes_count(XFS_M(sb));
1077 xfs_fs_free_cached_objects(
1078 struct super_block *sb,
1079 struct shrink_control *sc)
1081 return xfs_reclaim_inodes_nr(XFS_M(sb), sc->nr_to_scan);
1084 static const struct super_operations xfs_super_operations = {
1085 .alloc_inode = xfs_fs_alloc_inode,
1086 .destroy_inode = xfs_fs_destroy_inode,
1087 .dirty_inode = xfs_fs_dirty_inode,
1088 .drop_inode = xfs_fs_drop_inode,
1089 .put_super = xfs_fs_put_super,
1090 .sync_fs = xfs_fs_sync_fs,
1091 .freeze_fs = xfs_fs_freeze,
1092 .unfreeze_fs = xfs_fs_unfreeze,
1093 .statfs = xfs_fs_statfs,
1094 .show_options = xfs_fs_show_options,
1095 .nr_cached_objects = xfs_fs_nr_cached_objects,
1096 .free_cached_objects = xfs_fs_free_cached_objects,
1105 int last, shift_left_factor = 0, _res;
1109 value = kstrdup(s, GFP_KERNEL);
1113 last = strlen(value) - 1;
1114 if (value[last] == 'K' || value[last] == 'k') {
1115 shift_left_factor = 10;
1118 if (value[last] == 'M' || value[last] == 'm') {
1119 shift_left_factor = 20;
1122 if (value[last] == 'G' || value[last] == 'g') {
1123 shift_left_factor = 30;
1127 if (kstrtoint(value, base, &_res))
1130 *res = _res << shift_left_factor;
1135 * Set mount state from a mount option.
1137 * NOTE: mp->m_super is NULL here!
1141 struct fs_context *fc,
1142 struct fs_parameter *param)
1144 struct xfs_mount *mp = fc->s_fs_info;
1145 struct fs_parse_result result;
1149 opt = fs_parse(fc, &xfs_fs_parameters, param, &result);
1155 mp->m_logbufs = result.uint_32;
1158 if (suffix_kstrtoint(param->string, 10, &mp->m_logbsize))
1162 kfree(mp->m_logname);
1163 mp->m_logname = kstrdup(param->string, GFP_KERNEL);
1168 kfree(mp->m_rtname);
1169 mp->m_rtname = kstrdup(param->string, GFP_KERNEL);
1174 if (suffix_kstrtoint(param->string, 10, &size))
1176 mp->m_allocsize_log = ffs(size) - 1;
1177 mp->m_flags |= XFS_MOUNT_ALLOCSIZE;
1181 mp->m_flags |= XFS_MOUNT_GRPID;
1184 case Opt_sysvgroups:
1185 mp->m_flags &= ~XFS_MOUNT_GRPID;
1188 mp->m_flags |= XFS_MOUNT_WSYNC;
1190 case Opt_norecovery:
1191 mp->m_flags |= XFS_MOUNT_NORECOVERY;
1194 mp->m_flags |= XFS_MOUNT_NOALIGN;
1197 mp->m_flags |= XFS_MOUNT_SWALLOC;
1200 mp->m_dalign = result.uint_32;
1203 mp->m_swidth = result.uint_32;
1206 mp->m_flags |= XFS_MOUNT_SMALL_INUMS;
1209 mp->m_flags &= ~XFS_MOUNT_SMALL_INUMS;
1212 mp->m_flags |= XFS_MOUNT_NOUUID;
1215 mp->m_flags |= XFS_MOUNT_IKEEP;
1218 mp->m_flags &= ~XFS_MOUNT_IKEEP;
1221 mp->m_flags |= XFS_MOUNT_LARGEIO;
1224 mp->m_flags &= ~XFS_MOUNT_LARGEIO;
1227 mp->m_flags |= XFS_MOUNT_ATTR2;
1230 mp->m_flags &= ~XFS_MOUNT_ATTR2;
1231 mp->m_flags |= XFS_MOUNT_NOATTR2;
1233 case Opt_filestreams:
1234 mp->m_flags |= XFS_MOUNT_FILESTREAMS;
1237 mp->m_qflags &= ~XFS_ALL_QUOTA_ACCT;
1238 mp->m_qflags &= ~XFS_ALL_QUOTA_ENFD;
1239 mp->m_qflags &= ~XFS_ALL_QUOTA_ACTIVE;
1244 mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE |
1247 case Opt_qnoenforce:
1248 case Opt_uqnoenforce:
1249 mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE);
1250 mp->m_qflags &= ~XFS_UQUOTA_ENFD;
1254 mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE |
1257 case Opt_pqnoenforce:
1258 mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE);
1259 mp->m_qflags &= ~XFS_PQUOTA_ENFD;
1263 mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE |
1266 case Opt_gqnoenforce:
1267 mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE);
1268 mp->m_qflags &= ~XFS_GQUOTA_ENFD;
1271 mp->m_flags |= XFS_MOUNT_DISCARD;
1274 mp->m_flags &= ~XFS_MOUNT_DISCARD;
1276 #ifdef CONFIG_FS_DAX
1278 mp->m_flags |= XFS_MOUNT_DAX;
1282 xfs_warn(mp, "unknown mount option [%s].", param->key);
1290 xfs_fc_validate_params(
1291 struct xfs_mount *mp)
1294 * no recovery flag requires a read-only mount
1296 if ((mp->m_flags & XFS_MOUNT_NORECOVERY) &&
1297 !(mp->m_flags & XFS_MOUNT_RDONLY)) {
1298 xfs_warn(mp, "no-recovery mounts must be read-only.");
1302 if ((mp->m_flags & XFS_MOUNT_NOALIGN) &&
1303 (mp->m_dalign || mp->m_swidth)) {
1305 "sunit and swidth options incompatible with the noalign option");
1309 if (!IS_ENABLED(CONFIG_XFS_QUOTA) && mp->m_qflags != 0) {
1310 xfs_warn(mp, "quota support not available in this kernel.");
1314 if ((mp->m_dalign && !mp->m_swidth) ||
1315 (!mp->m_dalign && mp->m_swidth)) {
1316 xfs_warn(mp, "sunit and swidth must be specified together");
1320 if (mp->m_dalign && (mp->m_swidth % mp->m_dalign != 0)) {
1322 "stripe width (%d) must be a multiple of the stripe unit (%d)",
1323 mp->m_swidth, mp->m_dalign);
1327 if (mp->m_logbufs != -1 &&
1328 mp->m_logbufs != 0 &&
1329 (mp->m_logbufs < XLOG_MIN_ICLOGS ||
1330 mp->m_logbufs > XLOG_MAX_ICLOGS)) {
1331 xfs_warn(mp, "invalid logbufs value: %d [not %d-%d]",
1332 mp->m_logbufs, XLOG_MIN_ICLOGS, XLOG_MAX_ICLOGS);
1336 if (mp->m_logbsize != -1 &&
1337 mp->m_logbsize != 0 &&
1338 (mp->m_logbsize < XLOG_MIN_RECORD_BSIZE ||
1339 mp->m_logbsize > XLOG_MAX_RECORD_BSIZE ||
1340 !is_power_of_2(mp->m_logbsize))) {
1342 "invalid logbufsize: %d [not 16k,32k,64k,128k or 256k]",
1347 if ((mp->m_flags & XFS_MOUNT_ALLOCSIZE) &&
1348 (mp->m_allocsize_log > XFS_MAX_IO_LOG ||
1349 mp->m_allocsize_log < XFS_MIN_IO_LOG)) {
1350 xfs_warn(mp, "invalid log iosize: %d [not %d-%d]",
1351 mp->m_allocsize_log, XFS_MIN_IO_LOG, XFS_MAX_IO_LOG);
1360 struct super_block *sb,
1361 struct fs_context *fc)
1363 struct xfs_mount *mp = sb->s_fs_info;
1365 int flags = 0, error;
1369 error = xfs_fc_validate_params(mp);
1371 goto out_free_names;
1373 sb_min_blocksize(sb, BBSIZE);
1374 sb->s_xattr = xfs_xattr_handlers;
1375 sb->s_export_op = &xfs_export_operations;
1376 #ifdef CONFIG_XFS_QUOTA
1377 sb->s_qcop = &xfs_quotactl_operations;
1378 sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP | QTYPE_MASK_PRJ;
1380 sb->s_op = &xfs_super_operations;
1383 * Delay mount work if the debug hook is set. This is debug
1384 * instrumention to coordinate simulation of xfs mount failures with
1385 * VFS superblock operations
1387 if (xfs_globals.mount_delay) {
1388 xfs_notice(mp, "Delaying mount for %d seconds.",
1389 xfs_globals.mount_delay);
1390 msleep(xfs_globals.mount_delay * 1000);
1393 if (fc->sb_flags & SB_SILENT)
1394 flags |= XFS_MFSI_QUIET;
1396 error = xfs_open_devices(mp);
1398 goto out_free_names;
1400 error = xfs_init_mount_workqueues(mp);
1402 goto out_close_devices;
1404 error = xfs_init_percpu_counters(mp);
1406 goto out_destroy_workqueues;
1408 /* Allocate stats memory before we do operations that might use it */
1409 mp->m_stats.xs_stats = alloc_percpu(struct xfsstats);
1410 if (!mp->m_stats.xs_stats) {
1412 goto out_destroy_counters;
1415 error = xfs_readsb(mp, flags);
1417 goto out_free_stats;
1419 error = xfs_finish_flags(mp);
1423 error = xfs_setup_devices(mp);
1427 error = xfs_filestream_mount(mp);
1432 * we must configure the block size in the superblock before we run the
1433 * full mount process as the mount process can lookup and cache inodes.
1435 sb->s_magic = XFS_SUPER_MAGIC;
1436 sb->s_blocksize = mp->m_sb.sb_blocksize;
1437 sb->s_blocksize_bits = ffs(sb->s_blocksize) - 1;
1438 sb->s_maxbytes = xfs_max_file_offset(sb->s_blocksize_bits);
1439 sb->s_max_links = XFS_MAXLINK;
1440 sb->s_time_gran = 1;
1441 sb->s_time_min = S32_MIN;
1442 sb->s_time_max = S32_MAX;
1443 sb->s_iflags |= SB_I_CGROUPWB;
1445 set_posix_acl_flag(sb);
1447 /* version 5 superblocks support inode version counters. */
1448 if (XFS_SB_VERSION_NUM(&mp->m_sb) == XFS_SB_VERSION_5)
1449 sb->s_flags |= SB_I_VERSION;
1451 if (mp->m_flags & XFS_MOUNT_DAX) {
1452 bool rtdev_is_dax = false, datadev_is_dax;
1455 "DAX enabled. Warning: EXPERIMENTAL, use at your own risk");
1457 datadev_is_dax = bdev_dax_supported(mp->m_ddev_targp->bt_bdev,
1459 if (mp->m_rtdev_targp)
1460 rtdev_is_dax = bdev_dax_supported(
1461 mp->m_rtdev_targp->bt_bdev, sb->s_blocksize);
1462 if (!rtdev_is_dax && !datadev_is_dax) {
1464 "DAX unsupported by block device. Turning off DAX.");
1465 mp->m_flags &= ~XFS_MOUNT_DAX;
1467 if (xfs_sb_version_hasreflink(&mp->m_sb)) {
1469 "DAX and reflink cannot be used together!");
1471 goto out_filestream_unmount;
1475 if (mp->m_flags & XFS_MOUNT_DISCARD) {
1476 struct request_queue *q = bdev_get_queue(sb->s_bdev);
1478 if (!blk_queue_discard(q)) {
1479 xfs_warn(mp, "mounting with \"discard\" option, but "
1480 "the device does not support discard");
1481 mp->m_flags &= ~XFS_MOUNT_DISCARD;
1485 if (xfs_sb_version_hasreflink(&mp->m_sb)) {
1486 if (mp->m_sb.sb_rblocks) {
1488 "reflink not compatible with realtime device!");
1490 goto out_filestream_unmount;
1493 if (xfs_globals.always_cow) {
1494 xfs_info(mp, "using DEBUG-only always_cow mode.");
1495 mp->m_always_cow = true;
1499 if (xfs_sb_version_hasrmapbt(&mp->m_sb) && mp->m_sb.sb_rblocks) {
1501 "reverse mapping btree not compatible with realtime device!");
1503 goto out_filestream_unmount;
1506 error = xfs_mountfs(mp);
1508 goto out_filestream_unmount;
1510 root = igrab(VFS_I(mp->m_rootip));
1515 sb->s_root = d_make_root(root);
1523 out_filestream_unmount:
1524 xfs_filestream_unmount(mp);
1528 free_percpu(mp->m_stats.xs_stats);
1529 out_destroy_counters:
1530 xfs_destroy_percpu_counters(mp);
1531 out_destroy_workqueues:
1532 xfs_destroy_mount_workqueues(mp);
1534 xfs_close_devices(mp);
1536 sb->s_fs_info = NULL;
1541 xfs_filestream_unmount(mp);
1548 struct fs_context *fc)
1550 return get_tree_bdev(fc, xfs_fc_fill_super);
1555 struct xfs_mount *mp)
1557 struct xfs_sb *sbp = &mp->m_sb;
1560 if (mp->m_flags & XFS_MOUNT_NORECOVERY) {
1562 "ro->rw transition prohibited on norecovery mount");
1566 if (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5 &&
1567 xfs_sb_has_ro_compat_feature(sbp, XFS_SB_FEAT_RO_COMPAT_UNKNOWN)) {
1569 "ro->rw transition prohibited on unknown (0x%x) ro-compat filesystem",
1570 (sbp->sb_features_ro_compat &
1571 XFS_SB_FEAT_RO_COMPAT_UNKNOWN));
1575 mp->m_flags &= ~XFS_MOUNT_RDONLY;
1578 * If this is the first remount to writeable state we might have some
1579 * superblock changes to update.
1581 if (mp->m_update_sb) {
1582 error = xfs_sync_sb(mp, false);
1584 xfs_warn(mp, "failed to write sb changes");
1587 mp->m_update_sb = false;
1591 * Fill out the reserve pool if it is empty. Use the stashed value if
1592 * it is non-zero, otherwise go with the default.
1594 xfs_restore_resvblks(mp);
1595 xfs_log_work_queue(mp);
1597 /* Recover any CoW blocks that never got remapped. */
1598 error = xfs_reflink_recover_cow(mp);
1601 "Error %d recovering leftover CoW allocations.", error);
1602 xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE);
1605 xfs_start_block_reaping(mp);
1607 /* Create the per-AG metadata reservation pool .*/
1608 error = xfs_fs_reserve_ag_blocks(mp);
1609 if (error && error != -ENOSPC)
1617 struct xfs_mount *mp)
1622 * Cancel background eofb scanning so it cannot race with the final
1623 * log force+buftarg wait and deadlock the remount.
1625 xfs_stop_block_reaping(mp);
1627 /* Get rid of any leftover CoW reservations... */
1628 error = xfs_icache_free_cowblocks(mp, NULL);
1630 xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE);
1634 /* Free the per-AG metadata reservation pool. */
1635 error = xfs_fs_unreserve_ag_blocks(mp);
1637 xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE);
1642 * Before we sync the metadata, we need to free up the reserve block
1643 * pool so that the used block count in the superblock on disk is
1644 * correct at the end of the remount. Stash the current* reserve pool
1645 * size so that if we get remounted rw, we can return it to the same
1648 xfs_save_resvblks(mp);
1650 xfs_quiesce_attr(mp);
1651 mp->m_flags |= XFS_MOUNT_RDONLY;
1657 * Logically we would return an error here to prevent users from believing
1658 * they might have changed mount options using remount which can't be changed.
1660 * But unfortunately mount(8) adds all options from mtab and fstab to the mount
1661 * arguments in some cases so we can't blindly reject options, but have to
1662 * check for each specified option if it actually differs from the currently
1663 * set option and only reject it if that's the case.
1665 * Until that is implemented we return success for every remount request, and
1666 * silently ignore all options that we can't actually change.
1670 struct fs_context *fc)
1672 struct xfs_mount *mp = XFS_M(fc->root->d_sb);
1673 struct xfs_mount *new_mp = fc->s_fs_info;
1674 xfs_sb_t *sbp = &mp->m_sb;
1675 int flags = fc->sb_flags;
1678 error = xfs_fc_validate_params(new_mp);
1682 sync_filesystem(mp->m_super);
1684 /* inode32 -> inode64 */
1685 if ((mp->m_flags & XFS_MOUNT_SMALL_INUMS) &&
1686 !(new_mp->m_flags & XFS_MOUNT_SMALL_INUMS)) {
1687 mp->m_flags &= ~XFS_MOUNT_SMALL_INUMS;
1688 mp->m_maxagi = xfs_set_inode_alloc(mp, sbp->sb_agcount);
1691 /* inode64 -> inode32 */
1692 if (!(mp->m_flags & XFS_MOUNT_SMALL_INUMS) &&
1693 (new_mp->m_flags & XFS_MOUNT_SMALL_INUMS)) {
1694 mp->m_flags |= XFS_MOUNT_SMALL_INUMS;
1695 mp->m_maxagi = xfs_set_inode_alloc(mp, sbp->sb_agcount);
1699 if ((mp->m_flags & XFS_MOUNT_RDONLY) && !(flags & SB_RDONLY)) {
1700 error = xfs_remount_rw(mp);
1706 if (!(mp->m_flags & XFS_MOUNT_RDONLY) && (flags & SB_RDONLY)) {
1707 error = xfs_remount_ro(mp);
1715 static void xfs_fc_free(
1716 struct fs_context *fc)
1718 struct xfs_mount *mp = fc->s_fs_info;
1721 * mp is stored in the fs_context when it is initialized.
1722 * mp is transferred to the superblock on a successful mount,
1723 * but if an error occurs before the transfer we have to free
1730 static const struct fs_context_operations xfs_context_ops = {
1731 .parse_param = xfs_fc_parse_param,
1732 .get_tree = xfs_fc_get_tree,
1733 .reconfigure = xfs_fc_reconfigure,
1734 .free = xfs_fc_free,
1737 static int xfs_init_fs_context(
1738 struct fs_context *fc)
1740 struct xfs_mount *mp;
1742 mp = kmem_alloc(sizeof(struct xfs_mount), KM_ZERO);
1746 spin_lock_init(&mp->m_sb_lock);
1747 spin_lock_init(&mp->m_agirotor_lock);
1748 INIT_RADIX_TREE(&mp->m_perag_tree, GFP_ATOMIC);
1749 spin_lock_init(&mp->m_perag_lock);
1750 mutex_init(&mp->m_growlock);
1751 atomic_set(&mp->m_active_trans, 0);
1752 INIT_DELAYED_WORK(&mp->m_reclaim_work, xfs_reclaim_worker);
1753 INIT_DELAYED_WORK(&mp->m_eofblocks_work, xfs_eofblocks_worker);
1754 INIT_DELAYED_WORK(&mp->m_cowblocks_work, xfs_cowblocks_worker);
1755 mp->m_kobj.kobject.kset = xfs_kset;
1757 * We don't create the finobt per-ag space reservation until after log
1758 * recovery, so we must set this to true so that an ifree transaction
1759 * started during log recovery will not depend on space reservations
1760 * for finobt expansion.
1762 mp->m_finobt_nores = true;
1765 * These can be overridden by the mount option parsing.
1768 mp->m_logbsize = -1;
1769 mp->m_allocsize_log = 16; /* 64k */
1772 * Copy binary VFS mount flags we are interested in.
1774 if (fc->sb_flags & SB_RDONLY)
1775 mp->m_flags |= XFS_MOUNT_RDONLY;
1776 if (fc->sb_flags & SB_DIRSYNC)
1777 mp->m_flags |= XFS_MOUNT_DIRSYNC;
1778 if (fc->sb_flags & SB_SYNCHRONOUS)
1779 mp->m_flags |= XFS_MOUNT_WSYNC;
1782 fc->ops = &xfs_context_ops;
1787 static struct file_system_type xfs_fs_type = {
1788 .owner = THIS_MODULE,
1790 .init_fs_context = xfs_init_fs_context,
1791 .parameters = &xfs_fs_parameters,
1792 .kill_sb = kill_block_super,
1793 .fs_flags = FS_REQUIRES_DEV,
1795 MODULE_ALIAS_FS("xfs");
1798 xfs_init_zones(void)
1800 xfs_log_ticket_zone = kmem_cache_create("xfs_log_ticket",
1801 sizeof(struct xlog_ticket),
1803 if (!xfs_log_ticket_zone)
1806 xfs_bmap_free_item_zone = kmem_cache_create("xfs_bmap_free_item",
1807 sizeof(struct xfs_extent_free_item),
1809 if (!xfs_bmap_free_item_zone)
1810 goto out_destroy_log_ticket_zone;
1812 xfs_btree_cur_zone = kmem_cache_create("xfs_btree_cur",
1813 sizeof(struct xfs_btree_cur),
1815 if (!xfs_btree_cur_zone)
1816 goto out_destroy_bmap_free_item_zone;
1818 xfs_da_state_zone = kmem_cache_create("xfs_da_state",
1819 sizeof(struct xfs_da_state),
1821 if (!xfs_da_state_zone)
1822 goto out_destroy_btree_cur_zone;
1824 xfs_ifork_zone = kmem_cache_create("xfs_ifork",
1825 sizeof(struct xfs_ifork),
1827 if (!xfs_ifork_zone)
1828 goto out_destroy_da_state_zone;
1830 xfs_trans_zone = kmem_cache_create("xf_trans",
1831 sizeof(struct xfs_trans),
1833 if (!xfs_trans_zone)
1834 goto out_destroy_ifork_zone;
1838 * The size of the zone allocated buf log item is the maximum
1839 * size possible under XFS. This wastes a little bit of memory,
1840 * but it is much faster.
1842 xfs_buf_item_zone = kmem_cache_create("xfs_buf_item",
1843 sizeof(struct xfs_buf_log_item),
1845 if (!xfs_buf_item_zone)
1846 goto out_destroy_trans_zone;
1848 xfs_efd_zone = kmem_cache_create("xfs_efd_item",
1849 (sizeof(struct xfs_efd_log_item) +
1850 (XFS_EFD_MAX_FAST_EXTENTS - 1) *
1851 sizeof(struct xfs_extent)),
1854 goto out_destroy_buf_item_zone;
1856 xfs_efi_zone = kmem_cache_create("xfs_efi_item",
1857 (sizeof(struct xfs_efi_log_item) +
1858 (XFS_EFI_MAX_FAST_EXTENTS - 1) *
1859 sizeof(struct xfs_extent)),
1862 goto out_destroy_efd_zone;
1864 xfs_inode_zone = kmem_cache_create("xfs_inode",
1865 sizeof(struct xfs_inode), 0,
1866 (SLAB_HWCACHE_ALIGN |
1867 SLAB_RECLAIM_ACCOUNT |
1868 SLAB_MEM_SPREAD | SLAB_ACCOUNT),
1869 xfs_fs_inode_init_once);
1870 if (!xfs_inode_zone)
1871 goto out_destroy_efi_zone;
1873 xfs_ili_zone = kmem_cache_create("xfs_ili",
1874 sizeof(struct xfs_inode_log_item), 0,
1875 SLAB_MEM_SPREAD, NULL);
1877 goto out_destroy_inode_zone;
1879 xfs_icreate_zone = kmem_cache_create("xfs_icr",
1880 sizeof(struct xfs_icreate_item),
1882 if (!xfs_icreate_zone)
1883 goto out_destroy_ili_zone;
1885 xfs_rud_zone = kmem_cache_create("xfs_rud_item",
1886 sizeof(struct xfs_rud_log_item),
1889 goto out_destroy_icreate_zone;
1891 xfs_rui_zone = kmem_cache_create("xfs_rui_item",
1892 xfs_rui_log_item_sizeof(XFS_RUI_MAX_FAST_EXTENTS),
1895 goto out_destroy_rud_zone;
1897 xfs_cud_zone = kmem_cache_create("xfs_cud_item",
1898 sizeof(struct xfs_cud_log_item),
1901 goto out_destroy_rui_zone;
1903 xfs_cui_zone = kmem_cache_create("xfs_cui_item",
1904 xfs_cui_log_item_sizeof(XFS_CUI_MAX_FAST_EXTENTS),
1907 goto out_destroy_cud_zone;
1909 xfs_bud_zone = kmem_cache_create("xfs_bud_item",
1910 sizeof(struct xfs_bud_log_item),
1913 goto out_destroy_cui_zone;
1915 xfs_bui_zone = kmem_cache_create("xfs_bui_item",
1916 xfs_bui_log_item_sizeof(XFS_BUI_MAX_FAST_EXTENTS),
1919 goto out_destroy_bud_zone;
1923 out_destroy_bud_zone:
1924 kmem_cache_destroy(xfs_bud_zone);
1925 out_destroy_cui_zone:
1926 kmem_cache_destroy(xfs_cui_zone);
1927 out_destroy_cud_zone:
1928 kmem_cache_destroy(xfs_cud_zone);
1929 out_destroy_rui_zone:
1930 kmem_cache_destroy(xfs_rui_zone);
1931 out_destroy_rud_zone:
1932 kmem_cache_destroy(xfs_rud_zone);
1933 out_destroy_icreate_zone:
1934 kmem_cache_destroy(xfs_icreate_zone);
1935 out_destroy_ili_zone:
1936 kmem_cache_destroy(xfs_ili_zone);
1937 out_destroy_inode_zone:
1938 kmem_cache_destroy(xfs_inode_zone);
1939 out_destroy_efi_zone:
1940 kmem_cache_destroy(xfs_efi_zone);
1941 out_destroy_efd_zone:
1942 kmem_cache_destroy(xfs_efd_zone);
1943 out_destroy_buf_item_zone:
1944 kmem_cache_destroy(xfs_buf_item_zone);
1945 out_destroy_trans_zone:
1946 kmem_cache_destroy(xfs_trans_zone);
1947 out_destroy_ifork_zone:
1948 kmem_cache_destroy(xfs_ifork_zone);
1949 out_destroy_da_state_zone:
1950 kmem_cache_destroy(xfs_da_state_zone);
1951 out_destroy_btree_cur_zone:
1952 kmem_cache_destroy(xfs_btree_cur_zone);
1953 out_destroy_bmap_free_item_zone:
1954 kmem_cache_destroy(xfs_bmap_free_item_zone);
1955 out_destroy_log_ticket_zone:
1956 kmem_cache_destroy(xfs_log_ticket_zone);
1962 xfs_destroy_zones(void)
1965 * Make sure all delayed rcu free are flushed before we
1969 kmem_cache_destroy(xfs_bui_zone);
1970 kmem_cache_destroy(xfs_bud_zone);
1971 kmem_cache_destroy(xfs_cui_zone);
1972 kmem_cache_destroy(xfs_cud_zone);
1973 kmem_cache_destroy(xfs_rui_zone);
1974 kmem_cache_destroy(xfs_rud_zone);
1975 kmem_cache_destroy(xfs_icreate_zone);
1976 kmem_cache_destroy(xfs_ili_zone);
1977 kmem_cache_destroy(xfs_inode_zone);
1978 kmem_cache_destroy(xfs_efi_zone);
1979 kmem_cache_destroy(xfs_efd_zone);
1980 kmem_cache_destroy(xfs_buf_item_zone);
1981 kmem_cache_destroy(xfs_trans_zone);
1982 kmem_cache_destroy(xfs_ifork_zone);
1983 kmem_cache_destroy(xfs_da_state_zone);
1984 kmem_cache_destroy(xfs_btree_cur_zone);
1985 kmem_cache_destroy(xfs_bmap_free_item_zone);
1986 kmem_cache_destroy(xfs_log_ticket_zone);
1990 xfs_init_workqueues(void)
1993 * The allocation workqueue can be used in memory reclaim situations
1994 * (writepage path), and parallelism is only limited by the number of
1995 * AGs in all the filesystems mounted. Hence use the default large
1996 * max_active value for this workqueue.
1998 xfs_alloc_wq = alloc_workqueue("xfsalloc",
1999 WQ_MEM_RECLAIM|WQ_FREEZABLE, 0);
2003 xfs_discard_wq = alloc_workqueue("xfsdiscard", WQ_UNBOUND, 0);
2004 if (!xfs_discard_wq)
2005 goto out_free_alloc_wq;
2009 destroy_workqueue(xfs_alloc_wq);
2014 xfs_destroy_workqueues(void)
2016 destroy_workqueue(xfs_discard_wq);
2017 destroy_workqueue(xfs_alloc_wq);
2025 xfs_check_ondisk_structs();
2027 printk(KERN_INFO XFS_VERSION_STRING " with "
2028 XFS_BUILD_OPTIONS " enabled\n");
2032 error = xfs_init_zones();
2036 error = xfs_init_workqueues();
2038 goto out_destroy_zones;
2040 error = xfs_mru_cache_init();
2042 goto out_destroy_wq;
2044 error = xfs_buf_init();
2046 goto out_mru_cache_uninit;
2048 error = xfs_init_procfs();
2050 goto out_buf_terminate;
2052 error = xfs_sysctl_register();
2054 goto out_cleanup_procfs;
2056 xfs_kset = kset_create_and_add("xfs", NULL, fs_kobj);
2059 goto out_sysctl_unregister;
2062 xfsstats.xs_kobj.kobject.kset = xfs_kset;
2064 xfsstats.xs_stats = alloc_percpu(struct xfsstats);
2065 if (!xfsstats.xs_stats) {
2067 goto out_kset_unregister;
2070 error = xfs_sysfs_init(&xfsstats.xs_kobj, &xfs_stats_ktype, NULL,
2073 goto out_free_stats;
2076 xfs_dbg_kobj.kobject.kset = xfs_kset;
2077 error = xfs_sysfs_init(&xfs_dbg_kobj, &xfs_dbg_ktype, NULL, "debug");
2079 goto out_remove_stats_kobj;
2082 error = xfs_qm_init();
2084 goto out_remove_dbg_kobj;
2086 error = register_filesystem(&xfs_fs_type);
2093 out_remove_dbg_kobj:
2095 xfs_sysfs_del(&xfs_dbg_kobj);
2096 out_remove_stats_kobj:
2098 xfs_sysfs_del(&xfsstats.xs_kobj);
2100 free_percpu(xfsstats.xs_stats);
2101 out_kset_unregister:
2102 kset_unregister(xfs_kset);
2103 out_sysctl_unregister:
2104 xfs_sysctl_unregister();
2106 xfs_cleanup_procfs();
2108 xfs_buf_terminate();
2109 out_mru_cache_uninit:
2110 xfs_mru_cache_uninit();
2112 xfs_destroy_workqueues();
2114 xfs_destroy_zones();
2123 unregister_filesystem(&xfs_fs_type);
2125 xfs_sysfs_del(&xfs_dbg_kobj);
2127 xfs_sysfs_del(&xfsstats.xs_kobj);
2128 free_percpu(xfsstats.xs_stats);
2129 kset_unregister(xfs_kset);
2130 xfs_sysctl_unregister();
2131 xfs_cleanup_procfs();
2132 xfs_buf_terminate();
2133 xfs_mru_cache_uninit();
2134 xfs_destroy_workqueues();
2135 xfs_destroy_zones();
2136 xfs_uuid_table_free();
2139 module_init(init_xfs_fs);
2140 module_exit(exit_xfs_fs);
2142 MODULE_AUTHOR("Silicon Graphics, Inc.");
2143 MODULE_DESCRIPTION(XFS_VERSION_STRING " with " XFS_BUILD_OPTIONS " enabled");
2144 MODULE_LICENSE("GPL");