2 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
7 * published by the Free Software Foundation.
9 * This program is distributed in the hope that it would be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write the Free Software Foundation,
16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
20 #include "xfs_types.h"
24 #include "xfs_trans.h"
28 #include "xfs_dmapi.h"
29 #include "xfs_mount.h"
30 #include "xfs_da_btree.h"
31 #include "xfs_bmap_btree.h"
32 #include "xfs_ialloc_btree.h"
33 #include "xfs_alloc_btree.h"
34 #include "xfs_dir2_sf.h"
35 #include "xfs_attr_sf.h"
36 #include "xfs_dinode.h"
37 #include "xfs_inode.h"
38 #include "xfs_inode_item.h"
39 #include "xfs_btree.h"
40 #include "xfs_alloc.h"
41 #include "xfs_ialloc.h"
42 #include "xfs_quota.h"
43 #include "xfs_error.h"
46 #include "xfs_refcache.h"
47 #include "xfs_buf_item.h"
48 #include "xfs_log_priv.h"
49 #include "xfs_dir2_trace.h"
50 #include "xfs_extfree_item.h"
54 #include "xfs_mru_cache.h"
55 #include "xfs_filestream.h"
56 #include "xfs_fsops.h"
58 STATIC int xfs_sync(bhv_desc_t *, int, cred_t *);
63 extern kmem_zone_t *xfs_bmap_free_item_zone;
64 extern kmem_zone_t *xfs_btree_cur_zone;
65 extern kmem_zone_t *xfs_trans_zone;
66 extern kmem_zone_t *xfs_buf_item_zone;
67 extern kmem_zone_t *xfs_dabuf_zone;
68 #ifdef XFS_DABUF_DEBUG
69 extern lock_t xfs_dabuf_global_lock;
70 spinlock_init(&xfs_dabuf_global_lock, "xfsda");
74 * Initialize all of the zone allocators we use.
76 xfs_bmap_free_item_zone = kmem_zone_init(sizeof(xfs_bmap_free_item_t),
77 "xfs_bmap_free_item");
78 xfs_btree_cur_zone = kmem_zone_init(sizeof(xfs_btree_cur_t),
80 xfs_trans_zone = kmem_zone_init(sizeof(xfs_trans_t), "xfs_trans");
82 kmem_zone_init(sizeof(xfs_da_state_t), "xfs_da_state");
83 xfs_dabuf_zone = kmem_zone_init(sizeof(xfs_dabuf_t), "xfs_dabuf");
84 xfs_ifork_zone = kmem_zone_init(sizeof(xfs_ifork_t), "xfs_ifork");
85 xfs_acl_zone_init(xfs_acl_zone, "xfs_acl");
87 xfs_filestream_init();
90 * The size of the zone allocated buf log item is the maximum
91 * size possible under XFS. This wastes a little bit of memory,
92 * but it is much faster.
95 kmem_zone_init((sizeof(xfs_buf_log_item_t) +
96 (((XFS_MAX_BLOCKSIZE / XFS_BLI_CHUNK) /
97 NBWORD) * sizeof(int))),
100 kmem_zone_init((sizeof(xfs_efd_log_item_t) +
101 ((XFS_EFD_MAX_FAST_EXTENTS - 1) *
102 sizeof(xfs_extent_t))),
105 kmem_zone_init((sizeof(xfs_efi_log_item_t) +
106 ((XFS_EFI_MAX_FAST_EXTENTS - 1) *
107 sizeof(xfs_extent_t))),
111 * These zones warrant special memory allocator hints
114 kmem_zone_init_flags(sizeof(xfs_inode_t), "xfs_inode",
115 KM_ZONE_HWALIGN | KM_ZONE_RECLAIM |
116 KM_ZONE_SPREAD, NULL);
118 kmem_zone_init_flags(sizeof(xfs_inode_log_item_t), "xfs_ili",
119 KM_ZONE_SPREAD, NULL);
121 kmem_zone_init_flags(sizeof(xfs_icluster_t), "xfs_icluster",
122 KM_ZONE_SPREAD, NULL);
125 * Allocate global trace buffers.
127 #ifdef XFS_ALLOC_TRACE
128 xfs_alloc_trace_buf = ktrace_alloc(XFS_ALLOC_TRACE_SIZE, KM_SLEEP);
130 #ifdef XFS_BMAP_TRACE
131 xfs_bmap_trace_buf = ktrace_alloc(XFS_BMAP_TRACE_SIZE, KM_SLEEP);
133 #ifdef XFS_BMBT_TRACE
134 xfs_bmbt_trace_buf = ktrace_alloc(XFS_BMBT_TRACE_SIZE, KM_SLEEP);
136 #ifdef XFS_ATTR_TRACE
137 xfs_attr_trace_buf = ktrace_alloc(XFS_ATTR_TRACE_SIZE, KM_SLEEP);
139 #ifdef XFS_DIR2_TRACE
140 xfs_dir2_trace_buf = ktrace_alloc(XFS_DIR2_GTRACE_SIZE, KM_SLEEP);
145 #if (defined(DEBUG) || defined(INDUCE_IO_ERROR))
146 xfs_error_test_init();
147 #endif /* DEBUG || INDUCE_IO_ERROR */
150 xfs_sysctl_register();
157 extern kmem_zone_t *xfs_bmap_free_item_zone;
158 extern kmem_zone_t *xfs_btree_cur_zone;
159 extern kmem_zone_t *xfs_inode_zone;
160 extern kmem_zone_t *xfs_trans_zone;
161 extern kmem_zone_t *xfs_da_state_zone;
162 extern kmem_zone_t *xfs_dabuf_zone;
163 extern kmem_zone_t *xfs_efd_zone;
164 extern kmem_zone_t *xfs_efi_zone;
165 extern kmem_zone_t *xfs_buf_item_zone;
166 extern kmem_zone_t *xfs_icluster_zone;
168 xfs_cleanup_procfs();
169 xfs_sysctl_unregister();
170 xfs_refcache_destroy();
171 xfs_filestream_uninit();
172 xfs_mru_cache_uninit();
173 xfs_acl_zone_destroy(xfs_acl_zone);
175 #ifdef XFS_DIR2_TRACE
176 ktrace_free(xfs_dir2_trace_buf);
178 #ifdef XFS_ATTR_TRACE
179 ktrace_free(xfs_attr_trace_buf);
181 #ifdef XFS_BMBT_TRACE
182 ktrace_free(xfs_bmbt_trace_buf);
184 #ifdef XFS_BMAP_TRACE
185 ktrace_free(xfs_bmap_trace_buf);
187 #ifdef XFS_ALLOC_TRACE
188 ktrace_free(xfs_alloc_trace_buf);
191 kmem_zone_destroy(xfs_bmap_free_item_zone);
192 kmem_zone_destroy(xfs_btree_cur_zone);
193 kmem_zone_destroy(xfs_inode_zone);
194 kmem_zone_destroy(xfs_trans_zone);
195 kmem_zone_destroy(xfs_da_state_zone);
196 kmem_zone_destroy(xfs_dabuf_zone);
197 kmem_zone_destroy(xfs_buf_item_zone);
198 kmem_zone_destroy(xfs_efd_zone);
199 kmem_zone_destroy(xfs_efi_zone);
200 kmem_zone_destroy(xfs_ifork_zone);
201 kmem_zone_destroy(xfs_ili_zone);
202 kmem_zone_destroy(xfs_icluster_zone);
208 * This function fills in xfs_mount_t fields based on mount args.
209 * Note: the superblock has _not_ yet been read in.
214 struct xfs_mount_args *ap,
215 struct xfs_mount *mp)
217 /* Values are in BBs */
218 if ((ap->flags & XFSMNT_NOALIGN) != XFSMNT_NOALIGN) {
220 * At this point the superblock has not been read
221 * in, therefore we do not know the block size.
222 * Before the mount call ends we will convert
225 mp->m_dalign = ap->sunit;
226 mp->m_swidth = ap->swidth;
229 if (ap->logbufs != -1 &&
231 (ap->logbufs < XLOG_MIN_ICLOGS ||
232 ap->logbufs > XLOG_MAX_ICLOGS)) {
234 "XFS: invalid logbufs value: %d [not %d-%d]",
235 ap->logbufs, XLOG_MIN_ICLOGS, XLOG_MAX_ICLOGS);
236 return XFS_ERROR(EINVAL);
238 mp->m_logbufs = ap->logbufs;
239 if (ap->logbufsize != -1 &&
240 ap->logbufsize != 0 &&
241 (ap->logbufsize < XLOG_MIN_RECORD_BSIZE ||
242 ap->logbufsize > XLOG_MAX_RECORD_BSIZE ||
243 !is_power_of_2(ap->logbufsize))) {
245 "XFS: invalid logbufsize: %d [not 16k,32k,64k,128k or 256k]",
247 return XFS_ERROR(EINVAL);
249 mp->m_logbsize = ap->logbufsize;
250 mp->m_fsname_len = strlen(ap->fsname) + 1;
251 mp->m_fsname = kmem_alloc(mp->m_fsname_len, KM_SLEEP);
252 strcpy(mp->m_fsname, ap->fsname);
254 mp->m_rtname = kmem_alloc(strlen(ap->rtname) + 1, KM_SLEEP);
255 strcpy(mp->m_rtname, ap->rtname);
257 if (ap->logname[0]) {
258 mp->m_logname = kmem_alloc(strlen(ap->logname) + 1, KM_SLEEP);
259 strcpy(mp->m_logname, ap->logname);
262 if (ap->flags & XFSMNT_WSYNC)
263 mp->m_flags |= XFS_MOUNT_WSYNC;
265 if (ap->flags & XFSMNT_INO64) {
266 mp->m_flags |= XFS_MOUNT_INO64;
267 mp->m_inoadd = XFS_INO64_OFFSET;
270 if (ap->flags & XFSMNT_RETERR)
271 mp->m_flags |= XFS_MOUNT_RETERR;
272 if (ap->flags & XFSMNT_NOALIGN)
273 mp->m_flags |= XFS_MOUNT_NOALIGN;
274 if (ap->flags & XFSMNT_SWALLOC)
275 mp->m_flags |= XFS_MOUNT_SWALLOC;
276 if (ap->flags & XFSMNT_OSYNCISOSYNC)
277 mp->m_flags |= XFS_MOUNT_OSYNCISOSYNC;
278 if (ap->flags & XFSMNT_32BITINODES)
279 mp->m_flags |= XFS_MOUNT_32BITINODES;
281 if (ap->flags & XFSMNT_IOSIZE) {
282 if (ap->iosizelog > XFS_MAX_IO_LOG ||
283 ap->iosizelog < XFS_MIN_IO_LOG) {
285 "XFS: invalid log iosize: %d [not %d-%d]",
286 ap->iosizelog, XFS_MIN_IO_LOG,
288 return XFS_ERROR(EINVAL);
291 mp->m_flags |= XFS_MOUNT_DFLT_IOSIZE;
292 mp->m_readio_log = mp->m_writeio_log = ap->iosizelog;
295 if (ap->flags & XFSMNT_IDELETE)
296 mp->m_flags |= XFS_MOUNT_IDELETE;
297 if (ap->flags & XFSMNT_DIRSYNC)
298 mp->m_flags |= XFS_MOUNT_DIRSYNC;
299 if (ap->flags & XFSMNT_ATTR2)
300 mp->m_flags |= XFS_MOUNT_ATTR2;
302 if (ap->flags2 & XFSMNT2_COMPAT_IOSIZE)
303 mp->m_flags |= XFS_MOUNT_COMPAT_IOSIZE;
306 * no recovery flag requires a read-only mount
308 if (ap->flags & XFSMNT_NORECOVERY) {
309 if (!(vfs->vfs_flag & VFS_RDONLY)) {
311 "XFS: tried to mount a FS read-write without recovery!");
312 return XFS_ERROR(EINVAL);
314 mp->m_flags |= XFS_MOUNT_NORECOVERY;
317 if (ap->flags & XFSMNT_NOUUID)
318 mp->m_flags |= XFS_MOUNT_NOUUID;
319 if (ap->flags & XFSMNT_BARRIER)
320 mp->m_flags |= XFS_MOUNT_BARRIER;
322 mp->m_flags &= ~XFS_MOUNT_BARRIER;
324 if (ap->flags2 & XFSMNT2_FILESTREAMS)
325 mp->m_flags |= XFS_MOUNT_FILESTREAMS;
331 * This function fills in xfs_mount_t fields based on mount args.
332 * Note: the superblock _has_ now been read in.
337 struct xfs_mount_args *ap,
338 struct xfs_mount *mp)
340 int ronly = (vfs->vfs_flag & VFS_RDONLY);
342 /* Fail a mount where the logbuf is smaller then the log stripe */
343 if (XFS_SB_VERSION_HASLOGV2(&mp->m_sb)) {
344 if ((ap->logbufsize <= 0) &&
345 (mp->m_sb.sb_logsunit > XLOG_BIG_RECORD_BSIZE)) {
346 mp->m_logbsize = mp->m_sb.sb_logsunit;
347 } else if (ap->logbufsize > 0 &&
348 ap->logbufsize < mp->m_sb.sb_logsunit) {
350 "XFS: logbuf size must be greater than or equal to log stripe size");
351 return XFS_ERROR(EINVAL);
354 /* Fail a mount if the logbuf is larger than 32K */
355 if (ap->logbufsize > XLOG_BIG_RECORD_BSIZE) {
357 "XFS: logbuf size for version 1 logs must be 16K or 32K");
358 return XFS_ERROR(EINVAL);
362 if (XFS_SB_VERSION_HASATTR2(&mp->m_sb)) {
363 mp->m_flags |= XFS_MOUNT_ATTR2;
367 * prohibit r/w mounts of read-only filesystems
369 if ((mp->m_sb.sb_flags & XFS_SBF_READONLY) && !ronly) {
371 "XFS: cannot mount a read-only filesystem as read-write");
372 return XFS_ERROR(EROFS);
376 * check for shared mount.
378 if (ap->flags & XFSMNT_SHARED) {
379 if (!XFS_SB_VERSION_HASSHARED(&mp->m_sb))
380 return XFS_ERROR(EINVAL);
383 * For IRIX 6.5, shared mounts must have the shared
384 * version bit set, have the persistent readonly
385 * field set, must be version 0 and can only be mounted
388 if (!ronly || !(mp->m_sb.sb_flags & XFS_SBF_READONLY) ||
389 (mp->m_sb.sb_shared_vn != 0))
390 return XFS_ERROR(EINVAL);
392 mp->m_flags |= XFS_MOUNT_SHARED;
395 * Shared XFS V0 can't deal with DMI. Return EINVAL.
397 if (mp->m_sb.sb_shared_vn == 0 && (ap->flags & XFSMNT_DMAPI))
398 return XFS_ERROR(EINVAL);
407 * The file system configurations are:
408 * (1) device (partition) with data and internal log
409 * (2) logical volume with data and log subvolumes.
410 * (3) logical volume with data, log, and realtime subvolumes.
412 * We only have to handle opening the log and realtime volumes here if
413 * they are present. The data subvolume has already been opened by
414 * get_sb_bdev() and is stored in vfsp->vfs_super->s_bdev.
418 struct bhv_desc *bhvp,
419 struct xfs_mount_args *args,
422 struct bhv_vfs *vfsp = bhvtovfs(bhvp);
424 struct xfs_mount *mp = XFS_BHVTOM(bhvp);
425 struct block_device *ddev, *logdev, *rtdev;
426 int flags = 0, error;
428 ddev = vfsp->vfs_super->s_bdev;
429 logdev = rtdev = NULL;
432 * Setup xfs_mount function vectors from available behaviors
434 p = vfs_bhv_lookup(vfsp, VFS_POSITION_DM);
435 mp->m_dm_ops = p ? *(xfs_dmops_t *) vfs_bhv_custom(p) : xfs_dmcore_stub;
436 p = vfs_bhv_lookup(vfsp, VFS_POSITION_QM);
437 mp->m_qm_ops = p ? *(xfs_qmops_t *) vfs_bhv_custom(p) : xfs_qmcore_stub;
438 p = vfs_bhv_lookup(vfsp, VFS_POSITION_IO);
439 mp->m_io_ops = p ? *(xfs_ioops_t *) vfs_bhv_custom(p) : xfs_iocore_xfs;
441 if (args->flags & XFSMNT_QUIET)
442 flags |= XFS_MFSI_QUIET;
445 * Open real time and log devices - order is important.
447 if (args->logname[0]) {
448 error = xfs_blkdev_get(mp, args->logname, &logdev);
452 if (args->rtname[0]) {
453 error = xfs_blkdev_get(mp, args->rtname, &rtdev);
455 xfs_blkdev_put(logdev);
459 if (rtdev == ddev || rtdev == logdev) {
461 "XFS: Cannot mount filesystem with identical rtdev and ddev/logdev.");
462 xfs_blkdev_put(logdev);
463 xfs_blkdev_put(rtdev);
469 * Setup xfs_mount buffer target pointers
472 mp->m_ddev_targp = xfs_alloc_buftarg(ddev, 0);
473 if (!mp->m_ddev_targp) {
474 xfs_blkdev_put(logdev);
475 xfs_blkdev_put(rtdev);
479 mp->m_rtdev_targp = xfs_alloc_buftarg(rtdev, 1);
480 if (!mp->m_rtdev_targp) {
481 xfs_blkdev_put(logdev);
482 xfs_blkdev_put(rtdev);
486 mp->m_logdev_targp = (logdev && logdev != ddev) ?
487 xfs_alloc_buftarg(logdev, 1) : mp->m_ddev_targp;
488 if (!mp->m_logdev_targp) {
489 xfs_blkdev_put(logdev);
490 xfs_blkdev_put(rtdev);
495 * Setup flags based on mount(2) options and then the superblock
497 error = xfs_start_flags(vfsp, args, mp);
500 error = xfs_readsb(mp, flags);
503 error = xfs_finish_flags(vfsp, args, mp);
508 * Setup xfs_mount buffer target pointers based on superblock
510 error = xfs_setsize_buftarg(mp->m_ddev_targp, mp->m_sb.sb_blocksize,
511 mp->m_sb.sb_sectsize);
512 if (!error && logdev && logdev != ddev) {
513 unsigned int log_sector_size = BBSIZE;
515 if (XFS_SB_VERSION_HASSECTOR(&mp->m_sb))
516 log_sector_size = mp->m_sb.sb_logsectsize;
517 error = xfs_setsize_buftarg(mp->m_logdev_targp,
518 mp->m_sb.sb_blocksize,
522 error = xfs_setsize_buftarg(mp->m_rtdev_targp,
523 mp->m_sb.sb_blocksize,
524 mp->m_sb.sb_sectsize);
528 if (mp->m_flags & XFS_MOUNT_BARRIER)
529 xfs_mountfs_check_barriers(mp);
531 if ((error = xfs_filestream_mount(mp)))
534 error = XFS_IOINIT(vfsp, args, flags);
544 xfs_binval(mp->m_ddev_targp);
545 if (logdev && logdev != ddev)
546 xfs_binval(mp->m_logdev_targp);
548 xfs_binval(mp->m_rtdev_targp);
550 xfs_unmountfs_close(mp, credp);
560 bhv_vfs_t *vfsp = bhvtovfs(bdp);
561 xfs_mount_t *mp = XFS_BHVTOM(bdp);
564 int unmount_event_wanted = 0;
565 int unmount_event_flags = 0;
566 int xfs_unmountfs_needed = 0;
573 if (vfsp->vfs_flag & VFS_DMI) {
574 error = XFS_SEND_PREUNMOUNT(mp, vfsp,
575 rvp, DM_RIGHT_NULL, rvp, DM_RIGHT_NULL,
577 (mp->m_dmevmask & (1<<DM_EVENT_PREUNMOUNT))?
578 0:DM_FLAGS_UNWANTED);
580 return XFS_ERROR(error);
581 unmount_event_wanted = 1;
582 unmount_event_flags = (mp->m_dmevmask & (1<<DM_EVENT_UNMOUNT))?
583 0 : DM_FLAGS_UNWANTED;
587 * First blow any referenced inode from this file system
588 * out of the reference cache, and delete the timer.
590 xfs_refcache_purge_mp(mp);
593 * Blow away any referenced inode in the filestreams cache.
594 * This can and will cause log traffic as inodes go inactive
597 xfs_filestream_unmount(mp);
599 XFS_bflush(mp->m_ddev_targp);
600 error = xfs_unmount_flush(mp, 0);
604 ASSERT(vn_count(rvp) == 1);
607 * Drop the reference count
612 * If we're forcing a shutdown, typically because of a media error,
613 * we want to make sure we invalidate dirty pages that belong to
614 * referenced vnodes as well.
616 if (XFS_FORCED_SHUTDOWN(mp)) {
617 error = xfs_sync(&mp->m_bhv,
618 (SYNC_WAIT | SYNC_CLOSE), credp);
619 ASSERT(error != EFSCORRUPTED);
621 xfs_unmountfs_needed = 1;
624 /* Send DMAPI event, if required.
625 * Then do xfs_unmountfs() if needed.
626 * Then return error (or zero).
628 if (unmount_event_wanted) {
629 /* Note: mp structure must still exist for
630 * XFS_SEND_UNMOUNT() call.
632 XFS_SEND_UNMOUNT(mp, vfsp, error == 0 ? rvp : NULL,
633 DM_RIGHT_NULL, 0, error, unmount_event_flags);
635 if (xfs_unmountfs_needed) {
637 * Call common unmount function to flush to disk
638 * and free the super block buffer & mount structures.
640 xfs_unmountfs(mp, credp);
643 return XFS_ERROR(error);
650 int count = 0, pincount;
652 xfs_refcache_purge_mp(mp);
653 xfs_flush_buftarg(mp->m_ddev_targp, 0);
654 xfs_finish_reclaim_all(mp, 0);
656 /* This loop must run at least twice.
657 * The first instance of the loop will flush
658 * most meta data but that will generate more
659 * meta data (typically directory updates).
660 * Which then must be flushed and logged before
661 * we can write the unmount record.
664 xfs_syncsub(mp, SYNC_INODE_QUIESCE, NULL);
665 pincount = xfs_flush_buftarg(mp->m_ddev_targp, 1);
676 * Second stage of a quiesce. The data is already synced, now we have to take
677 * care of the metadata. New transactions are already blocked, so we need to
678 * wait for any remaining transactions to drain out before proceding.
684 /* wait for all modifications to complete */
685 while (atomic_read(&mp->m_active_trans) > 0)
688 /* flush inodes and push all remaining buffers out to disk */
691 ASSERT_ALWAYS(atomic_read(&mp->m_active_trans) == 0);
693 /* Push the superblock and write an unmount record */
694 xfs_log_sbcount(mp, 1);
695 xfs_log_unmount_write(mp);
696 xfs_unmountfs_writesb(mp);
703 struct xfs_mount_args *args)
705 bhv_vfs_t *vfsp = bhvtovfs(bdp);
706 xfs_mount_t *mp = XFS_BHVTOM(bdp);
708 if (!(*flags & MS_RDONLY)) { /* rw/ro -> rw */
709 if (vfsp->vfs_flag & VFS_RDONLY)
710 vfsp->vfs_flag &= ~VFS_RDONLY;
711 if (args->flags & XFSMNT_BARRIER) {
712 mp->m_flags |= XFS_MOUNT_BARRIER;
713 xfs_mountfs_check_barriers(mp);
715 mp->m_flags &= ~XFS_MOUNT_BARRIER;
717 } else if (!(vfsp->vfs_flag & VFS_RDONLY)) { /* rw -> ro */
718 xfs_filestream_flush(mp);
719 bhv_vfs_sync(vfsp, SYNC_DATA_QUIESCE, NULL);
720 xfs_attr_quiesce(mp);
721 vfsp->vfs_flag |= VFS_RDONLY;
727 * xfs_unmount_flush implements a set of flush operation on special
728 * inodes, which are needed as a separate set of operations so that
729 * they can be called as part of relocation process.
733 xfs_mount_t *mp, /* Mount structure we are getting
735 int relocation) /* Called from vfs relocation. */
737 xfs_inode_t *rip = mp->m_rootip;
739 xfs_inode_t *rsumip = NULL;
740 bhv_vnode_t *rvp = XFS_ITOV(rip);
743 xfs_ilock(rip, XFS_ILOCK_EXCL | XFS_ILOCK_PARENT);
747 * Flush out the real time inodes.
749 if ((rbmip = mp->m_rbmip) != NULL) {
750 xfs_ilock(rbmip, XFS_ILOCK_EXCL);
752 error = xfs_iflush(rbmip, XFS_IFLUSH_SYNC);
753 xfs_iunlock(rbmip, XFS_ILOCK_EXCL);
755 if (error == EFSCORRUPTED)
758 ASSERT(vn_count(XFS_ITOV(rbmip)) == 1);
760 rsumip = mp->m_rsumip;
761 xfs_ilock(rsumip, XFS_ILOCK_EXCL);
763 error = xfs_iflush(rsumip, XFS_IFLUSH_SYNC);
764 xfs_iunlock(rsumip, XFS_ILOCK_EXCL);
766 if (error == EFSCORRUPTED)
769 ASSERT(vn_count(XFS_ITOV(rsumip)) == 1);
773 * Synchronously flush root inode to disk
775 error = xfs_iflush(rip, XFS_IFLUSH_SYNC);
776 if (error == EFSCORRUPTED)
779 if (vn_count(rvp) != 1 && !relocation) {
780 xfs_iunlock(rip, XFS_ILOCK_EXCL);
781 return XFS_ERROR(EBUSY);
785 * Release dquot that rootinode, rbmino and rsumino might be holding,
786 * flush and purge the quota inodes.
788 error = XFS_QM_UNMOUNT(mp);
789 if (error == EFSCORRUPTED)
793 VN_RELE(XFS_ITOV(rbmip));
794 VN_RELE(XFS_ITOV(rsumip));
797 xfs_iunlock(rip, XFS_ILOCK_EXCL);
804 xfs_iunlock(rip, XFS_ILOCK_EXCL);
806 return XFS_ERROR(EFSCORRUPTED);
810 * xfs_root extracts the root vnode from a vfs.
812 * vfsp -- the vfs struct for the desired file system
813 * vpp -- address of the caller's vnode pointer which should be
814 * set to the desired fs root vnode
823 vp = XFS_ITOV((XFS_BHVTOM(bdp))->m_rootip);
832 * Fill in the statvfs structure for the given file system. We use
833 * the superblock lock in the mount structure to ensure a consistent
834 * snapshot of the counters returned.
839 bhv_statvfs_t *statp,
848 mp = XFS_BHVTOM(bdp);
851 statp->f_type = XFS_SB_MAGIC;
853 xfs_icsb_sync_counters_flags(mp, XFS_ICSB_LAZY_COUNT);
855 statp->f_bsize = sbp->sb_blocksize;
856 lsize = sbp->sb_logstart ? sbp->sb_logblocks : 0;
857 statp->f_blocks = sbp->sb_dblocks - lsize;
858 statp->f_bfree = statp->f_bavail =
859 sbp->sb_fdblocks - XFS_ALLOC_SET_ASIDE(mp);
860 fakeinos = statp->f_bfree << sbp->sb_inopblog;
862 fakeinos += mp->m_inoadd;
865 MIN(sbp->sb_icount + fakeinos, (__uint64_t)XFS_MAXINUMBER);
870 statp->f_files = min_t(typeof(statp->f_files),
873 statp->f_ffree = statp->f_files - (sbp->sb_icount - sbp->sb_ifree);
874 XFS_SB_UNLOCK(mp, s);
876 xfs_statvfs_fsid(statp, mp);
877 statp->f_namelen = MAXNAMELEN - 1;
884 * xfs_sync flushes any pending I/O to file system vfsp.
886 * This routine is called by vfs_sync() to make sure that things make it
887 * out to disk eventually, on sync() system calls to flush out everything,
888 * and when the file system is unmounted. For the vfs_sync() case, all
889 * we really need to do is sync out the log to make all of our meta-data
890 * updates permanent (except for timestamps). For calls from pflushd(),
891 * dirty pages are kept moving by calling pdflush() on the inodes
892 * containing them. We also flush the inodes that we can lock without
893 * sleeping and the superblock if we can lock it without sleeping from
894 * vfs_sync() so that items at the tail of the log are always moving out.
897 * SYNC_BDFLUSH - We're being called from vfs_sync() so we don't want
898 * to sleep if we can help it. All we really need
899 * to do is ensure that the log is synced at least
900 * periodically. We also push the inodes and
901 * superblock if we can lock them without sleeping
902 * and they are not pinned.
903 * SYNC_ATTR - We need to flush the inodes. If SYNC_BDFLUSH is not
904 * set, then we really want to lock each inode and flush
906 * SYNC_WAIT - All the flushes that take place in this call should
908 * SYNC_DELWRI - This tells us to push dirty pages associated with
909 * inodes. SYNC_WAIT and SYNC_BDFLUSH are used to
910 * determine if they should be flushed sync, async, or
912 * SYNC_CLOSE - This flag is passed when the system is being
913 * unmounted. We should sync and invalidate everything.
914 * SYNC_FSDATA - This indicates that the caller would like to make
915 * sure the superblock is safe on disk. We can ensure
916 * this by simply making sure the log gets flushed
917 * if SYNC_BDFLUSH is set, and by actually writing it
919 * SYNC_IOWAIT - The caller wants us to wait for all data I/O to complete
920 * before we return (including direct I/O). Forms the drain
921 * side of the write barrier needed to safely quiesce the
932 xfs_mount_t *mp = XFS_BHVTOM(bdp);
934 if (flags & SYNC_IOWAIT)
935 xfs_filestream_flush(mp);
937 return xfs_syncsub(mp, flags, NULL);
941 * xfs sync routine for internal use
943 * This routine supports all of the flags defined for the generic vfs_sync
944 * interface as explained above under xfs_sync.
953 xfs_inode_t *ip = NULL;
954 xfs_inode_t *ip_next;
956 bhv_vnode_t *vp = NULL;
961 uint base_lock_flags;
962 boolean_t mount_locked;
963 boolean_t vnode_refed;
966 xfs_iptr_t *ipointer;
968 boolean_t ipointer_in = B_FALSE;
970 #define IPOINTER_SET ipointer_in = B_TRUE
971 #define IPOINTER_CLR ipointer_in = B_FALSE
978 /* Insert a marker record into the inode list after inode ip. The list
979 * must be locked when this is called. After the call the list will no
982 #define IPOINTER_INSERT(ip, mp) { \
983 ASSERT(ipointer_in == B_FALSE); \
984 ipointer->ip_mnext = ip->i_mnext; \
985 ipointer->ip_mprev = ip; \
986 ip->i_mnext = (xfs_inode_t *)ipointer; \
987 ipointer->ip_mnext->i_mprev = (xfs_inode_t *)ipointer; \
989 XFS_MOUNT_IUNLOCK(mp); \
990 mount_locked = B_FALSE; \
994 /* Remove the marker from the inode list. If the marker was the only item
995 * in the list then there are no remaining inodes and we should zero out
996 * the whole list. If we are the current head of the list then move the head
999 #define IPOINTER_REMOVE(ip, mp) { \
1000 ASSERT(ipointer_in == B_TRUE); \
1001 if (ipointer->ip_mnext != (xfs_inode_t *)ipointer) { \
1002 ip = ipointer->ip_mnext; \
1003 ip->i_mprev = ipointer->ip_mprev; \
1004 ipointer->ip_mprev->i_mnext = ip; \
1005 if (mp->m_inodes == (xfs_inode_t *)ipointer) { \
1006 mp->m_inodes = ip; \
1009 ASSERT(mp->m_inodes == (xfs_inode_t *)ipointer); \
1010 mp->m_inodes = NULL; \
1016 #define XFS_PREEMPT_MASK 0x7f
1020 if (XFS_MTOVFS(mp)->vfs_flag & VFS_RDONLY)
1026 /* Allocate a reference marker */
1027 ipointer = (xfs_iptr_t *)kmem_zalloc(sizeof(xfs_iptr_t), KM_SLEEP);
1029 fflag = XFS_B_ASYNC; /* default is don't wait */
1030 if (flags & (SYNC_BDFLUSH | SYNC_DELWRI))
1031 fflag = XFS_B_DELWRI;
1032 if (flags & SYNC_WAIT)
1033 fflag = 0; /* synchronous overrides all */
1035 base_lock_flags = XFS_ILOCK_SHARED;
1036 if (flags & (SYNC_DELWRI | SYNC_CLOSE)) {
1038 * We need the I/O lock if we're going to call any of
1039 * the flush/inval routines.
1041 base_lock_flags |= XFS_IOLOCK_SHARED;
1044 XFS_MOUNT_ILOCK(mp);
1048 mount_locked = B_TRUE;
1049 vnode_refed = B_FALSE;
1054 ASSERT(ipointer_in == B_FALSE);
1055 ASSERT(vnode_refed == B_FALSE);
1057 lock_flags = base_lock_flags;
1060 * There were no inodes in the list, just break out
1068 * We found another sync thread marker - skip it
1070 if (ip->i_mount == NULL) {
1075 vp = XFS_ITOV_NULL(ip);
1078 * If the vnode is gone then this is being torn down,
1079 * call reclaim if it is flushed, else let regular flush
1080 * code deal with it later in the loop.
1084 /* Skip ones already in reclaim */
1085 if (ip->i_flags & XFS_IRECLAIM) {
1089 if (xfs_ilock_nowait(ip, XFS_ILOCK_EXCL) == 0) {
1091 } else if ((xfs_ipincount(ip) == 0) &&
1092 xfs_iflock_nowait(ip)) {
1093 IPOINTER_INSERT(ip, mp);
1095 xfs_finish_reclaim(ip, 1,
1096 XFS_IFLUSH_DELWRI_ELSE_ASYNC);
1098 XFS_MOUNT_ILOCK(mp);
1099 mount_locked = B_TRUE;
1100 IPOINTER_REMOVE(ip, mp);
1102 xfs_iunlock(ip, XFS_ILOCK_EXCL);
1113 if (XFS_FORCED_SHUTDOWN(mp) && !(flags & SYNC_CLOSE)) {
1114 XFS_MOUNT_IUNLOCK(mp);
1115 kmem_free(ipointer, sizeof(xfs_iptr_t));
1120 * If this is just vfs_sync() or pflushd() calling
1121 * then we can skip inodes for which it looks like
1122 * there is nothing to do. Since we don't have the
1123 * inode locked this is racy, but these are periodic
1124 * calls so it doesn't matter. For the others we want
1125 * to know for sure, so we at least try to lock them.
1127 if (flags & SYNC_BDFLUSH) {
1128 if (((ip->i_itemp == NULL) ||
1129 !(ip->i_itemp->ili_format.ilf_fields &
1131 (ip->i_update_core == 0)) {
1138 * Try to lock without sleeping. We're out of order with
1139 * the inode list lock here, so if we fail we need to drop
1140 * the mount lock and try again. If we're called from
1141 * bdflush() here, then don't bother.
1143 * The inode lock here actually coordinates with the
1144 * almost spurious inode lock in xfs_ireclaim() to prevent
1145 * the vnode we handle here without a reference from
1146 * being freed while we reference it. If we lock the inode
1147 * while it's on the mount list here, then the spurious inode
1148 * lock in xfs_ireclaim() after the inode is pulled from
1149 * the mount list will sleep until we release it here.
1150 * This keeps the vnode from being freed while we reference
1153 if (xfs_ilock_nowait(ip, lock_flags) == 0) {
1154 if ((flags & SYNC_BDFLUSH) || (vp == NULL)) {
1165 IPOINTER_INSERT(ip, mp);
1166 xfs_ilock(ip, lock_flags);
1168 ASSERT(vp == XFS_ITOV(ip));
1169 ASSERT(ip->i_mount == mp);
1171 vnode_refed = B_TRUE;
1174 /* From here on in the loop we may have a marker record
1175 * in the inode list.
1179 * If we have to flush data or wait for I/O completion
1180 * we need to drop the ilock that we currently hold.
1181 * If we need to drop the lock, insert a marker if we
1182 * have not already done so.
1184 if ((flags & (SYNC_CLOSE|SYNC_IOWAIT)) ||
1185 ((flags & SYNC_DELWRI) && VN_DIRTY(vp))) {
1187 IPOINTER_INSERT(ip, mp);
1189 xfs_iunlock(ip, XFS_ILOCK_SHARED);
1191 if (flags & SYNC_CLOSE) {
1192 /* Shutdown case. Flush and invalidate. */
1193 if (XFS_FORCED_SHUTDOWN(mp))
1194 bhv_vop_toss_pages(vp, 0, -1, FI_REMAPF);
1196 error = bhv_vop_flushinval_pages(vp, 0,
1198 } else if ((flags & SYNC_DELWRI) && VN_DIRTY(vp)) {
1199 error = bhv_vop_flush_pages(vp, (xfs_off_t)0,
1200 -1, fflag, FI_NONE);
1204 * When freezing, we need to wait ensure all I/O (including direct
1205 * I/O) is complete to ensure no further data modification can take
1206 * place after this point
1208 if (flags & SYNC_IOWAIT)
1211 xfs_ilock(ip, XFS_ILOCK_SHARED);
1214 if (flags & SYNC_BDFLUSH) {
1215 if ((flags & SYNC_ATTR) &&
1216 ((ip->i_update_core) ||
1217 ((ip->i_itemp != NULL) &&
1218 (ip->i_itemp->ili_format.ilf_fields != 0)))) {
1220 /* Insert marker and drop lock if not already
1224 IPOINTER_INSERT(ip, mp);
1228 * We don't want the periodic flushing of the
1229 * inodes by vfs_sync() to interfere with
1230 * I/O to the file, especially read I/O
1231 * where it is only the access time stamp
1232 * that is being flushed out. To prevent
1233 * long periods where we have both inode
1234 * locks held shared here while reading the
1235 * inode's buffer in from disk, we drop the
1236 * inode lock while reading in the inode
1237 * buffer. We have to release the buffer
1238 * and reacquire the inode lock so that they
1239 * are acquired in the proper order (inode
1240 * locks first). The buffer will go at the
1241 * end of the lru chain, though, so we can
1242 * expect it to still be there when we go
1243 * for it again in xfs_iflush().
1245 if ((xfs_ipincount(ip) == 0) &&
1246 xfs_iflock_nowait(ip)) {
1249 xfs_iunlock(ip, XFS_ILOCK_SHARED);
1251 error = xfs_itobp(mp, NULL, ip,
1256 /* Bailing out, remove the
1257 * marker and free it.
1259 XFS_MOUNT_ILOCK(mp);
1260 IPOINTER_REMOVE(ip, mp);
1261 XFS_MOUNT_IUNLOCK(mp);
1263 ASSERT(!(lock_flags &
1264 XFS_IOLOCK_SHARED));
1267 sizeof(xfs_iptr_t));
1272 * Since we dropped the inode lock,
1273 * the inode may have been reclaimed.
1274 * Therefore, we reacquire the mount
1275 * lock and check to see if we were the
1276 * inode reclaimed. If this happened
1277 * then the ipointer marker will no
1278 * longer point back at us. In this
1279 * case, move ip along to the inode
1280 * after the marker, remove the marker
1283 XFS_MOUNT_ILOCK(mp);
1284 mount_locked = B_TRUE;
1286 if (ip != ipointer->ip_mprev) {
1287 IPOINTER_REMOVE(ip, mp);
1289 ASSERT(!vnode_refed);
1290 ASSERT(!(lock_flags &
1291 XFS_IOLOCK_SHARED));
1295 ASSERT(ip->i_mount == mp);
1297 if (xfs_ilock_nowait(ip,
1298 XFS_ILOCK_SHARED) == 0) {
1299 ASSERT(ip->i_mount == mp);
1301 * We failed to reacquire
1302 * the inode lock without
1303 * sleeping, so just skip
1304 * the inode for now. We
1305 * clear the ILOCK bit from
1306 * the lock_flags so that we
1307 * won't try to drop a lock
1308 * we don't hold below.
1310 lock_flags &= ~XFS_ILOCK_SHARED;
1311 IPOINTER_REMOVE(ip_next, mp);
1312 } else if ((xfs_ipincount(ip) == 0) &&
1313 xfs_iflock_nowait(ip)) {
1314 ASSERT(ip->i_mount == mp);
1316 * Since this is vfs_sync()
1317 * calling we only flush the
1318 * inode out if we can lock
1319 * it without sleeping and
1320 * it is not pinned. Drop
1321 * the mount lock here so
1322 * that we don't hold it for
1323 * too long. We already have
1324 * a marker in the list here.
1326 XFS_MOUNT_IUNLOCK(mp);
1327 mount_locked = B_FALSE;
1328 error = xfs_iflush(ip,
1331 ASSERT(ip->i_mount == mp);
1332 IPOINTER_REMOVE(ip_next, mp);
1339 if ((flags & SYNC_ATTR) &&
1340 ((ip->i_update_core) ||
1341 ((ip->i_itemp != NULL) &&
1342 (ip->i_itemp->ili_format.ilf_fields != 0)))) {
1344 IPOINTER_INSERT(ip, mp);
1347 if (flags & SYNC_WAIT) {
1349 error = xfs_iflush(ip,
1353 * If we can't acquire the flush
1354 * lock, then the inode is already
1355 * being flushed so don't bother
1356 * waiting. If we can lock it then
1357 * do a delwri flush so we can
1358 * combine multiple inode flushes
1359 * in each disk write.
1361 if (xfs_iflock_nowait(ip)) {
1362 error = xfs_iflush(ip,
1371 if (lock_flags != 0) {
1372 xfs_iunlock(ip, lock_flags);
1377 * If we had to take a reference on the vnode
1378 * above, then wait until after we've unlocked
1379 * the inode to release the reference. This is
1380 * because we can be already holding the inode
1381 * lock when VN_RELE() calls xfs_inactive().
1383 * Make sure to drop the mount lock before calling
1384 * VN_RELE() so that we don't trip over ourselves if
1385 * we have to go for the mount lock again in the
1389 IPOINTER_INSERT(ip, mp);
1394 vnode_refed = B_FALSE;
1402 * bail out if the filesystem is corrupted.
1404 if (error == EFSCORRUPTED) {
1405 if (!mount_locked) {
1406 XFS_MOUNT_ILOCK(mp);
1407 IPOINTER_REMOVE(ip, mp);
1409 XFS_MOUNT_IUNLOCK(mp);
1410 ASSERT(ipointer_in == B_FALSE);
1411 kmem_free(ipointer, sizeof(xfs_iptr_t));
1412 return XFS_ERROR(error);
1415 /* Let other threads have a chance at the mount lock
1416 * if we have looped many times without dropping the
1419 if ((++preempt & XFS_PREEMPT_MASK) == 0) {
1421 IPOINTER_INSERT(ip, mp);
1425 if (mount_locked == B_FALSE) {
1426 XFS_MOUNT_ILOCK(mp);
1427 mount_locked = B_TRUE;
1428 IPOINTER_REMOVE(ip, mp);
1432 ASSERT(ipointer_in == B_FALSE);
1435 } while (ip != mp->m_inodes);
1437 XFS_MOUNT_IUNLOCK(mp);
1439 ASSERT(ipointer_in == B_FALSE);
1441 kmem_free(ipointer, sizeof(xfs_iptr_t));
1442 return XFS_ERROR(last_error);
1446 * xfs sync routine for internal use
1448 * This routine supports all of the flags defined for the generic vfs_sync
1449 * interface as explained above under xfs_sync.
1460 uint log_flags = XFS_LOG_FORCE;
1462 xfs_buf_log_item_t *bip;
1465 * Sync out the log. This ensures that the log is periodically
1466 * flushed even if there is not enough activity to fill it up.
1468 if (flags & SYNC_WAIT)
1469 log_flags |= XFS_LOG_SYNC;
1471 xfs_log_force(mp, (xfs_lsn_t)0, log_flags);
1473 if (flags & (SYNC_ATTR|SYNC_DELWRI)) {
1474 if (flags & SYNC_BDFLUSH)
1475 xfs_finish_reclaim_all(mp, 1);
1477 error = xfs_sync_inodes(mp, flags, bypassed);
1481 * Flushing out dirty data above probably generated more
1482 * log activity, so if this isn't vfs_sync() then flush
1485 if (flags & SYNC_DELWRI) {
1486 xfs_log_force(mp, (xfs_lsn_t)0, log_flags);
1489 if (flags & SYNC_FSDATA) {
1491 * If this is vfs_sync() then only sync the superblock
1492 * if we can lock it without sleeping and it is not pinned.
1494 if (flags & SYNC_BDFLUSH) {
1495 bp = xfs_getsb(mp, XFS_BUF_TRYLOCK);
1497 bip = XFS_BUF_FSPRIVATE(bp,xfs_buf_log_item_t*);
1498 if ((bip != NULL) &&
1499 xfs_buf_item_dirty(bip)) {
1500 if (!(XFS_BUF_ISPINNED(bp))) {
1502 error = xfs_bwrite(mp, bp);
1511 bp = xfs_getsb(mp, 0);
1513 * If the buffer is pinned then push on the log so
1514 * we won't get stuck waiting in the write for
1515 * someone, maybe ourselves, to flush the log.
1516 * Even though we just pushed the log above, we
1517 * did not have the superblock buffer locked at
1518 * that point so it can become pinned in between
1521 if (XFS_BUF_ISPINNED(bp))
1522 xfs_log_force(mp, (xfs_lsn_t)0, XFS_LOG_FORCE);
1523 if (flags & SYNC_WAIT)
1524 XFS_BUF_UNASYNC(bp);
1527 error = xfs_bwrite(mp, bp);
1535 * If this is the periodic sync, then kick some entries out of
1536 * the reference cache. This ensures that idle entries are
1537 * eventually kicked out of the cache.
1539 if (flags & SYNC_REFCACHE) {
1540 if (flags & SYNC_WAIT)
1541 xfs_refcache_purge_mp(mp);
1543 xfs_refcache_purge_some(mp);
1547 * If asked, update the disk superblock with incore counter values if we
1548 * are using non-persistent counters so that they don't get too far out
1549 * of sync if we crash or get a forced shutdown. We don't want to force
1550 * this to disk, just get a transaction into the iclogs....
1552 if (flags & SYNC_SUPER)
1553 xfs_log_sbcount(mp, 0);
1556 * Now check to see if the log needs a "dummy" transaction.
1559 if (!(flags & SYNC_REMOUNT) && xfs_log_need_covered(mp)) {
1564 * Put a dummy transaction in the log to tell
1565 * recovery that all others are OK.
1567 tp = xfs_trans_alloc(mp, XFS_TRANS_DUMMY1);
1568 if ((error = xfs_trans_reserve(tp, 0,
1569 XFS_ICHANGE_LOG_RES(mp),
1571 xfs_trans_cancel(tp, 0);
1576 xfs_ilock(ip, XFS_ILOCK_EXCL);
1578 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
1579 xfs_trans_ihold(tp, ip);
1580 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1581 error = xfs_trans_commit(tp, 0);
1582 xfs_iunlock(ip, XFS_ILOCK_EXCL);
1583 xfs_log_force(mp, (xfs_lsn_t)0, log_flags);
1587 * When shutting down, we need to insure that the AIL is pushed
1588 * to disk or the filesystem can appear corrupt from the PROM.
1590 if ((flags & (SYNC_CLOSE|SYNC_WAIT)) == (SYNC_CLOSE|SYNC_WAIT)) {
1591 XFS_bflush(mp->m_ddev_targp);
1592 if (mp->m_rtdev_targp) {
1593 XFS_bflush(mp->m_rtdev_targp);
1597 return XFS_ERROR(last_error);
1601 * xfs_vget - called by DMAPI and NFSD to get vnode from file handle
1609 xfs_mount_t *mp = XFS_BHVTOM(bdp);
1610 xfs_fid_t *xfid = (struct xfs_fid *)fidp;
1617 * Invalid. Since handles can be created in user space and passed in
1618 * via gethandle(), this is not cause for a panic.
1620 if (xfid->xfs_fid_len != sizeof(*xfid) - sizeof(xfid->xfs_fid_len))
1621 return XFS_ERROR(EINVAL);
1623 ino = xfid->xfs_fid_ino;
1624 igen = xfid->xfs_fid_gen;
1627 * NFS can sometimes send requests for ino 0. Fail them gracefully.
1630 return XFS_ERROR(ESTALE);
1632 error = xfs_iget(mp, NULL, ino, 0, XFS_ILOCK_SHARED, &ip, 0);
1640 return XFS_ERROR(EIO);
1643 if (ip->i_d.di_mode == 0 || ip->i_d.di_gen != igen) {
1644 xfs_iput_new(ip, XFS_ILOCK_SHARED);
1646 return XFS_ERROR(ENOENT);
1649 *vpp = XFS_ITOV(ip);
1650 xfs_iunlock(ip, XFS_ILOCK_SHARED);
1655 #define MNTOPT_LOGBUFS "logbufs" /* number of XFS log buffers */
1656 #define MNTOPT_LOGBSIZE "logbsize" /* size of XFS log buffers */
1657 #define MNTOPT_LOGDEV "logdev" /* log device */
1658 #define MNTOPT_RTDEV "rtdev" /* realtime I/O device */
1659 #define MNTOPT_BIOSIZE "biosize" /* log2 of preferred buffered io size */
1660 #define MNTOPT_WSYNC "wsync" /* safe-mode nfs compatible mount */
1661 #define MNTOPT_INO64 "ino64" /* force inodes into 64-bit range */
1662 #define MNTOPT_NOALIGN "noalign" /* turn off stripe alignment */
1663 #define MNTOPT_SWALLOC "swalloc" /* turn on stripe width allocation */
1664 #define MNTOPT_SUNIT "sunit" /* data volume stripe unit */
1665 #define MNTOPT_SWIDTH "swidth" /* data volume stripe width */
1666 #define MNTOPT_NOUUID "nouuid" /* ignore filesystem UUID */
1667 #define MNTOPT_MTPT "mtpt" /* filesystem mount point */
1668 #define MNTOPT_GRPID "grpid" /* group-ID from parent directory */
1669 #define MNTOPT_NOGRPID "nogrpid" /* group-ID from current process */
1670 #define MNTOPT_BSDGROUPS "bsdgroups" /* group-ID from parent directory */
1671 #define MNTOPT_SYSVGROUPS "sysvgroups" /* group-ID from current process */
1672 #define MNTOPT_ALLOCSIZE "allocsize" /* preferred allocation size */
1673 #define MNTOPT_NORECOVERY "norecovery" /* don't run XFS recovery */
1674 #define MNTOPT_BARRIER "barrier" /* use writer barriers for log write and
1675 * unwritten extent conversion */
1676 #define MNTOPT_NOBARRIER "nobarrier" /* .. disable */
1677 #define MNTOPT_OSYNCISOSYNC "osyncisosync" /* o_sync is REALLY o_sync */
1678 #define MNTOPT_64BITINODE "inode64" /* inodes can be allocated anywhere */
1679 #define MNTOPT_IKEEP "ikeep" /* do not free empty inode clusters */
1680 #define MNTOPT_NOIKEEP "noikeep" /* free empty inode clusters */
1681 #define MNTOPT_LARGEIO "largeio" /* report large I/O sizes in stat() */
1682 #define MNTOPT_NOLARGEIO "nolargeio" /* do not report large I/O sizes
1684 #define MNTOPT_ATTR2 "attr2" /* do use attr2 attribute format */
1685 #define MNTOPT_NOATTR2 "noattr2" /* do not use attr2 attribute format */
1686 #define MNTOPT_FILESTREAM "filestreams" /* use filestreams allocator */
1688 STATIC unsigned long
1689 suffix_strtoul(char *s, char **endp, unsigned int base)
1691 int last, shift_left_factor = 0;
1694 last = strlen(value) - 1;
1695 if (value[last] == 'K' || value[last] == 'k') {
1696 shift_left_factor = 10;
1699 if (value[last] == 'M' || value[last] == 'm') {
1700 shift_left_factor = 20;
1703 if (value[last] == 'G' || value[last] == 'g') {
1704 shift_left_factor = 30;
1708 return simple_strtoul((const char *)s, endp, base) << shift_left_factor;
1713 struct bhv_desc *bhv,
1715 struct xfs_mount_args *args,
1718 bhv_vfs_t *vfsp = bhvtovfs(bhv);
1719 char *this_char, *value, *eov;
1720 int dsunit, dswidth, vol_dsunit, vol_dswidth;
1723 args->flags |= XFSMNT_IDELETE;
1724 args->flags |= XFSMNT_BARRIER;
1725 args->flags2 |= XFSMNT2_COMPAT_IOSIZE;
1730 iosize = dsunit = dswidth = vol_dsunit = vol_dswidth = 0;
1732 while ((this_char = strsep(&options, ",")) != NULL) {
1735 if ((value = strchr(this_char, '=')) != NULL)
1738 if (!strcmp(this_char, MNTOPT_LOGBUFS)) {
1739 if (!value || !*value) {
1741 "XFS: %s option requires an argument",
1745 args->logbufs = simple_strtoul(value, &eov, 10);
1746 } else if (!strcmp(this_char, MNTOPT_LOGBSIZE)) {
1747 if (!value || !*value) {
1749 "XFS: %s option requires an argument",
1753 args->logbufsize = suffix_strtoul(value, &eov, 10);
1754 } else if (!strcmp(this_char, MNTOPT_LOGDEV)) {
1755 if (!value || !*value) {
1757 "XFS: %s option requires an argument",
1761 strncpy(args->logname, value, MAXNAMELEN);
1762 } else if (!strcmp(this_char, MNTOPT_MTPT)) {
1763 if (!value || !*value) {
1765 "XFS: %s option requires an argument",
1769 strncpy(args->mtpt, value, MAXNAMELEN);
1770 } else if (!strcmp(this_char, MNTOPT_RTDEV)) {
1771 if (!value || !*value) {
1773 "XFS: %s option requires an argument",
1777 strncpy(args->rtname, value, MAXNAMELEN);
1778 } else if (!strcmp(this_char, MNTOPT_BIOSIZE)) {
1779 if (!value || !*value) {
1781 "XFS: %s option requires an argument",
1785 iosize = simple_strtoul(value, &eov, 10);
1786 args->flags |= XFSMNT_IOSIZE;
1787 args->iosizelog = (uint8_t) iosize;
1788 } else if (!strcmp(this_char, MNTOPT_ALLOCSIZE)) {
1789 if (!value || !*value) {
1791 "XFS: %s option requires an argument",
1795 iosize = suffix_strtoul(value, &eov, 10);
1796 args->flags |= XFSMNT_IOSIZE;
1797 args->iosizelog = ffs(iosize) - 1;
1798 } else if (!strcmp(this_char, MNTOPT_GRPID) ||
1799 !strcmp(this_char, MNTOPT_BSDGROUPS)) {
1800 vfsp->vfs_flag |= VFS_GRPID;
1801 } else if (!strcmp(this_char, MNTOPT_NOGRPID) ||
1802 !strcmp(this_char, MNTOPT_SYSVGROUPS)) {
1803 vfsp->vfs_flag &= ~VFS_GRPID;
1804 } else if (!strcmp(this_char, MNTOPT_WSYNC)) {
1805 args->flags |= XFSMNT_WSYNC;
1806 } else if (!strcmp(this_char, MNTOPT_OSYNCISOSYNC)) {
1807 args->flags |= XFSMNT_OSYNCISOSYNC;
1808 } else if (!strcmp(this_char, MNTOPT_NORECOVERY)) {
1809 args->flags |= XFSMNT_NORECOVERY;
1810 } else if (!strcmp(this_char, MNTOPT_INO64)) {
1811 args->flags |= XFSMNT_INO64;
1814 "XFS: %s option not allowed on this system",
1818 } else if (!strcmp(this_char, MNTOPT_NOALIGN)) {
1819 args->flags |= XFSMNT_NOALIGN;
1820 } else if (!strcmp(this_char, MNTOPT_SWALLOC)) {
1821 args->flags |= XFSMNT_SWALLOC;
1822 } else if (!strcmp(this_char, MNTOPT_SUNIT)) {
1823 if (!value || !*value) {
1825 "XFS: %s option requires an argument",
1829 dsunit = simple_strtoul(value, &eov, 10);
1830 } else if (!strcmp(this_char, MNTOPT_SWIDTH)) {
1831 if (!value || !*value) {
1833 "XFS: %s option requires an argument",
1837 dswidth = simple_strtoul(value, &eov, 10);
1838 } else if (!strcmp(this_char, MNTOPT_64BITINODE)) {
1839 args->flags &= ~XFSMNT_32BITINODES;
1842 "XFS: %s option not allowed on this system",
1846 } else if (!strcmp(this_char, MNTOPT_NOUUID)) {
1847 args->flags |= XFSMNT_NOUUID;
1848 } else if (!strcmp(this_char, MNTOPT_BARRIER)) {
1849 args->flags |= XFSMNT_BARRIER;
1850 } else if (!strcmp(this_char, MNTOPT_NOBARRIER)) {
1851 args->flags &= ~XFSMNT_BARRIER;
1852 } else if (!strcmp(this_char, MNTOPT_IKEEP)) {
1853 args->flags &= ~XFSMNT_IDELETE;
1854 } else if (!strcmp(this_char, MNTOPT_NOIKEEP)) {
1855 args->flags |= XFSMNT_IDELETE;
1856 } else if (!strcmp(this_char, MNTOPT_LARGEIO)) {
1857 args->flags2 &= ~XFSMNT2_COMPAT_IOSIZE;
1858 } else if (!strcmp(this_char, MNTOPT_NOLARGEIO)) {
1859 args->flags2 |= XFSMNT2_COMPAT_IOSIZE;
1860 } else if (!strcmp(this_char, MNTOPT_ATTR2)) {
1861 args->flags |= XFSMNT_ATTR2;
1862 } else if (!strcmp(this_char, MNTOPT_NOATTR2)) {
1863 args->flags &= ~XFSMNT_ATTR2;
1864 } else if (!strcmp(this_char, MNTOPT_FILESTREAM)) {
1865 args->flags2 |= XFSMNT2_FILESTREAMS;
1866 } else if (!strcmp(this_char, "ihashsize")) {
1868 "XFS: ihashsize no longer used, option is deprecated.");
1869 } else if (!strcmp(this_char, "osyncisdsync")) {
1870 /* no-op, this is now the default */
1872 "XFS: osyncisdsync is now the default, option is deprecated.");
1873 } else if (!strcmp(this_char, "irixsgid")) {
1875 "XFS: irixsgid is now a sysctl(2) variable, option is deprecated.");
1878 "XFS: unknown mount option [%s].", this_char);
1883 if (args->flags & XFSMNT_NORECOVERY) {
1884 if ((vfsp->vfs_flag & VFS_RDONLY) == 0) {
1886 "XFS: no-recovery mounts must be read-only.");
1891 if ((args->flags & XFSMNT_NOALIGN) && (dsunit || dswidth)) {
1893 "XFS: sunit and swidth options incompatible with the noalign option");
1897 if ((dsunit && !dswidth) || (!dsunit && dswidth)) {
1899 "XFS: sunit and swidth must be specified together");
1903 if (dsunit && (dswidth % dsunit != 0)) {
1905 "XFS: stripe width (%d) must be a multiple of the stripe unit (%d)",
1910 if ((args->flags & XFSMNT_NOALIGN) != XFSMNT_NOALIGN) {
1912 args->sunit = dsunit;
1913 args->flags |= XFSMNT_RETERR;
1915 args->sunit = vol_dsunit;
1917 dswidth ? (args->swidth = dswidth) :
1918 (args->swidth = vol_dswidth);
1920 args->sunit = args->swidth = 0;
1924 if (args->flags & XFSMNT_32BITINODES)
1925 vfsp->vfs_flag |= VFS_32BITINODES;
1927 args->flags |= XFSMNT_FLAGS2;
1933 struct bhv_desc *bhv,
1936 static struct proc_xfs_info {
1940 /* the few simple ones we can get from the mount struct */
1941 { XFS_MOUNT_WSYNC, "," MNTOPT_WSYNC },
1942 { XFS_MOUNT_INO64, "," MNTOPT_INO64 },
1943 { XFS_MOUNT_NOALIGN, "," MNTOPT_NOALIGN },
1944 { XFS_MOUNT_SWALLOC, "," MNTOPT_SWALLOC },
1945 { XFS_MOUNT_NOUUID, "," MNTOPT_NOUUID },
1946 { XFS_MOUNT_NORECOVERY, "," MNTOPT_NORECOVERY },
1947 { XFS_MOUNT_OSYNCISOSYNC, "," MNTOPT_OSYNCISOSYNC },
1950 struct proc_xfs_info *xfs_infop;
1951 struct xfs_mount *mp = XFS_BHVTOM(bhv);
1952 struct bhv_vfs *vfsp = XFS_MTOVFS(mp);
1954 for (xfs_infop = xfs_info; xfs_infop->flag; xfs_infop++) {
1955 if (mp->m_flags & xfs_infop->flag)
1956 seq_puts(m, xfs_infop->str);
1959 if (mp->m_flags & XFS_MOUNT_DFLT_IOSIZE)
1960 seq_printf(m, "," MNTOPT_ALLOCSIZE "=%dk",
1961 (int)(1 << mp->m_writeio_log) >> 10);
1963 if (mp->m_logbufs > 0)
1964 seq_printf(m, "," MNTOPT_LOGBUFS "=%d", mp->m_logbufs);
1965 if (mp->m_logbsize > 0)
1966 seq_printf(m, "," MNTOPT_LOGBSIZE "=%dk", mp->m_logbsize >> 10);
1969 seq_printf(m, "," MNTOPT_LOGDEV "=%s", mp->m_logname);
1971 seq_printf(m, "," MNTOPT_RTDEV "=%s", mp->m_rtname);
1973 if (mp->m_dalign > 0)
1974 seq_printf(m, "," MNTOPT_SUNIT "=%d",
1975 (int)XFS_FSB_TO_BB(mp, mp->m_dalign));
1976 if (mp->m_swidth > 0)
1977 seq_printf(m, "," MNTOPT_SWIDTH "=%d",
1978 (int)XFS_FSB_TO_BB(mp, mp->m_swidth));
1980 if (!(mp->m_flags & XFS_MOUNT_IDELETE))
1981 seq_printf(m, "," MNTOPT_IKEEP);
1982 if (!(mp->m_flags & XFS_MOUNT_COMPAT_IOSIZE))
1983 seq_printf(m, "," MNTOPT_LARGEIO);
1985 if (!(vfsp->vfs_flag & VFS_32BITINODES))
1986 seq_printf(m, "," MNTOPT_64BITINODE);
1987 if (vfsp->vfs_flag & VFS_GRPID)
1988 seq_printf(m, "," MNTOPT_GRPID);
1994 * Second stage of a freeze. The data is already frozen so we only
1995 * need to take care of themetadata. Once that's done write a dummy
1996 * record to dirty the log in case of a crash while frozen.
2002 xfs_mount_t *mp = XFS_BHVTOM(bdp);
2004 xfs_attr_quiesce(mp);
2005 xfs_fs_log_dummy(mp);
2009 bhv_vfsops_t xfs_vfsops = {
2010 BHV_IDENTITY_INIT(VFS_BHV_XFS,VFS_POSITION_XFS),
2011 .vfs_parseargs = xfs_parseargs,
2012 .vfs_showargs = xfs_showargs,
2013 .vfs_mount = xfs_mount,
2014 .vfs_unmount = xfs_unmount,
2015 .vfs_mntupdate = xfs_mntupdate,
2016 .vfs_root = xfs_root,
2017 .vfs_statvfs = xfs_statvfs,
2018 .vfs_sync = xfs_sync,
2019 .vfs_vget = xfs_vget,
2020 .vfs_dmapiops = (vfs_dmapiops_t)fs_nosys,
2021 .vfs_quotactl = (vfs_quotactl_t)fs_nosys,
2022 .vfs_init_vnode = xfs_initialize_vnode,
2023 .vfs_force_shutdown = xfs_do_force_shutdown,
2024 .vfs_freeze = xfs_freeze,