4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
22 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
23 * Copyright (c) 2013 by Delphix. All rights reserved.
26 /* Portions Copyright 2010 Robert Milkowski */
28 #include <sys/types.h>
29 #include <sys/param.h>
30 #include <sys/systm.h>
31 #include <sys/sysmacros.h>
33 #include <sys/pathname.h>
34 #include <sys/vnode.h>
36 #include <sys/vfs_opreg.h>
37 #include <sys/mntent.h>
38 #include <sys/mount.h>
39 #include <sys/cmn_err.h>
40 #include "fs/fs_subr.h"
41 #include <sys/zfs_znode.h>
42 #include <sys/zfs_vnops.h>
43 #include <sys/zfs_dir.h>
45 #include <sys/fs/zfs.h>
47 #include <sys/dsl_prop.h>
48 #include <sys/dsl_dataset.h>
49 #include <sys/dsl_deleg.h>
53 #include <sys/sa_impl.h>
54 #include <sys/varargs.h>
55 #include <sys/policy.h>
56 #include <sys/atomic.h>
57 #include <sys/mkdev.h>
58 #include <sys/modctl.h>
59 #include <sys/refstr.h>
60 #include <sys/zfs_ioctl.h>
61 #include <sys/zfs_ctldir.h>
62 #include <sys/zfs_fuid.h>
63 #include <sys/bootconf.h>
64 #include <sys/sunddi.h>
66 #include <sys/dmu_objset.h>
67 #include <sys/spa_boot.h>
69 #include "zfs_comutil.h"
74 zfs_sync(struct super_block *sb, int wait, cred_t *cr)
76 zfs_sb_t *zsb = sb->s_fs_info;
79 * Data integrity is job one. We don't want a compromised kernel
80 * writing to the storage pool, so we never sync during panic.
82 if (unlikely(oops_in_progress))
86 * Semantically, the only requirement is that the sync be initiated.
87 * The DMU syncs out txgs frequently, so there's nothing to do.
94 * Sync a specific filesystem.
99 dp = dmu_objset_pool(zsb->z_os);
102 * If the system is shutting down, then skip any
103 * filesystems which may exist on a suspended pool.
105 if (spa_suspended(dp->dp_spa)) {
110 if (zsb->z_log != NULL)
111 zil_commit(zsb->z_log, 0);
116 * Sync all ZFS filesystems. This is what happens when you
117 * run sync(1M). Unlike other filesystems, ZFS honors the
118 * request by waiting for all pools to commit all dirty data.
125 EXPORT_SYMBOL(zfs_sync);
128 zfs_is_readonly(zfs_sb_t *zsb)
130 return (!!(zsb->z_sb->s_flags & MS_RDONLY));
132 EXPORT_SYMBOL(zfs_is_readonly);
135 atime_changed_cb(void *arg, uint64_t newval)
137 ((zfs_sb_t *)arg)->z_atime = newval;
141 relatime_changed_cb(void *arg, uint64_t newval)
143 ((zfs_sb_t *)arg)->z_relatime = newval;
147 xattr_changed_cb(void *arg, uint64_t newval)
151 if (newval == ZFS_XATTR_OFF) {
152 zsb->z_flags &= ~ZSB_XATTR;
154 zsb->z_flags |= ZSB_XATTR;
156 if (newval == ZFS_XATTR_SA)
157 zsb->z_xattr_sa = B_TRUE;
159 zsb->z_xattr_sa = B_FALSE;
164 acltype_changed_cb(void *arg, uint64_t newval)
169 case ZFS_ACLTYPE_OFF:
170 zsb->z_acl_type = ZFS_ACLTYPE_OFF;
171 zsb->z_sb->s_flags &= ~MS_POSIXACL;
173 case ZFS_ACLTYPE_POSIXACL:
174 #ifdef CONFIG_FS_POSIX_ACL
175 zsb->z_acl_type = ZFS_ACLTYPE_POSIXACL;
176 zsb->z_sb->s_flags |= MS_POSIXACL;
178 zsb->z_acl_type = ZFS_ACLTYPE_OFF;
179 zsb->z_sb->s_flags &= ~MS_POSIXACL;
180 #endif /* CONFIG_FS_POSIX_ACL */
188 blksz_changed_cb(void *arg, uint64_t newval)
192 if (newval < SPA_MINBLOCKSIZE ||
193 newval > SPA_MAXBLOCKSIZE || !ISP2(newval))
194 newval = SPA_MAXBLOCKSIZE;
196 zsb->z_max_blksz = newval;
200 readonly_changed_cb(void *arg, uint64_t newval)
203 struct super_block *sb = zsb->z_sb;
209 sb->s_flags |= MS_RDONLY;
211 sb->s_flags &= ~MS_RDONLY;
215 devices_changed_cb(void *arg, uint64_t newval)
220 setuid_changed_cb(void *arg, uint64_t newval)
225 exec_changed_cb(void *arg, uint64_t newval)
230 nbmand_changed_cb(void *arg, uint64_t newval)
233 struct super_block *sb = zsb->z_sb;
239 sb->s_flags |= MS_MANDLOCK;
241 sb->s_flags &= ~MS_MANDLOCK;
245 snapdir_changed_cb(void *arg, uint64_t newval)
247 ((zfs_sb_t *)arg)->z_show_ctldir = newval;
251 vscan_changed_cb(void *arg, uint64_t newval)
253 ((zfs_sb_t *)arg)->z_vscan = newval;
257 acl_inherit_changed_cb(void *arg, uint64_t newval)
259 ((zfs_sb_t *)arg)->z_acl_inherit = newval;
263 zfs_register_callbacks(zfs_sb_t *zsb)
265 struct dsl_dataset *ds = NULL;
266 objset_t *os = zsb->z_os;
267 boolean_t do_readonly = B_FALSE;
270 if (zfs_is_readonly(zsb) || !spa_writeable(dmu_objset_spa(os)))
271 do_readonly = B_TRUE;
274 * Register property callbacks.
276 * It would probably be fine to just check for i/o error from
277 * the first prop_register(), but I guess I like to go
280 ds = dmu_objset_ds(os);
281 dsl_pool_config_enter(dmu_objset_pool(os), FTAG);
282 error = dsl_prop_register(ds,
283 zfs_prop_to_name(ZFS_PROP_ATIME), atime_changed_cb, zsb);
284 error = dsl_prop_register(ds,
285 zfs_prop_to_name(ZFS_PROP_RELATIME), relatime_changed_cb, zsb);
286 error = error ? error : dsl_prop_register(ds,
287 zfs_prop_to_name(ZFS_PROP_XATTR), xattr_changed_cb, zsb);
288 error = error ? error : dsl_prop_register(ds,
289 zfs_prop_to_name(ZFS_PROP_RECORDSIZE), blksz_changed_cb, zsb);
290 error = error ? error : dsl_prop_register(ds,
291 zfs_prop_to_name(ZFS_PROP_READONLY), readonly_changed_cb, zsb);
292 error = error ? error : dsl_prop_register(ds,
293 zfs_prop_to_name(ZFS_PROP_DEVICES), devices_changed_cb, zsb);
294 error = error ? error : dsl_prop_register(ds,
295 zfs_prop_to_name(ZFS_PROP_SETUID), setuid_changed_cb, zsb);
296 error = error ? error : dsl_prop_register(ds,
297 zfs_prop_to_name(ZFS_PROP_EXEC), exec_changed_cb, zsb);
298 error = error ? error : dsl_prop_register(ds,
299 zfs_prop_to_name(ZFS_PROP_SNAPDIR), snapdir_changed_cb, zsb);
300 error = error ? error : dsl_prop_register(ds,
301 zfs_prop_to_name(ZFS_PROP_ACLTYPE), acltype_changed_cb, zsb);
302 error = error ? error : dsl_prop_register(ds,
303 zfs_prop_to_name(ZFS_PROP_ACLINHERIT), acl_inherit_changed_cb, zsb);
304 error = error ? error : dsl_prop_register(ds,
305 zfs_prop_to_name(ZFS_PROP_VSCAN), vscan_changed_cb, zsb);
306 error = error ? error : dsl_prop_register(ds,
307 zfs_prop_to_name(ZFS_PROP_NBMAND), nbmand_changed_cb, zsb);
308 dsl_pool_config_exit(dmu_objset_pool(os), FTAG);
313 readonly_changed_cb(zsb, B_TRUE);
319 * We may attempt to unregister some callbacks that are not
320 * registered, but this is OK; it will simply return ENOMSG,
321 * which we will ignore.
323 (void) dsl_prop_unregister(ds, zfs_prop_to_name(ZFS_PROP_ATIME),
324 atime_changed_cb, zsb);
325 (void) dsl_prop_unregister(ds, zfs_prop_to_name(ZFS_PROP_RELATIME),
326 relatime_changed_cb, zsb);
327 (void) dsl_prop_unregister(ds, zfs_prop_to_name(ZFS_PROP_XATTR),
328 xattr_changed_cb, zsb);
329 (void) dsl_prop_unregister(ds, zfs_prop_to_name(ZFS_PROP_RECORDSIZE),
330 blksz_changed_cb, zsb);
331 (void) dsl_prop_unregister(ds, zfs_prop_to_name(ZFS_PROP_READONLY),
332 readonly_changed_cb, zsb);
333 (void) dsl_prop_unregister(ds, zfs_prop_to_name(ZFS_PROP_DEVICES),
334 devices_changed_cb, zsb);
335 (void) dsl_prop_unregister(ds, zfs_prop_to_name(ZFS_PROP_SETUID),
336 setuid_changed_cb, zsb);
337 (void) dsl_prop_unregister(ds, zfs_prop_to_name(ZFS_PROP_EXEC),
338 exec_changed_cb, zsb);
339 (void) dsl_prop_unregister(ds, zfs_prop_to_name(ZFS_PROP_SNAPDIR),
340 snapdir_changed_cb, zsb);
341 (void) dsl_prop_unregister(ds, zfs_prop_to_name(ZFS_PROP_ACLTYPE),
342 acltype_changed_cb, zsb);
343 (void) dsl_prop_unregister(ds, zfs_prop_to_name(ZFS_PROP_ACLINHERIT),
344 acl_inherit_changed_cb, zsb);
345 (void) dsl_prop_unregister(ds, zfs_prop_to_name(ZFS_PROP_VSCAN),
346 vscan_changed_cb, zsb);
347 (void) dsl_prop_unregister(ds, zfs_prop_to_name(ZFS_PROP_NBMAND),
348 nbmand_changed_cb, zsb);
352 EXPORT_SYMBOL(zfs_register_callbacks);
355 zfs_space_delta_cb(dmu_object_type_t bonustype, void *data,
356 uint64_t *userp, uint64_t *groupp)
359 * Is it a valid type of object to track?
361 if (bonustype != DMU_OT_ZNODE && bonustype != DMU_OT_SA)
362 return (SET_ERROR(ENOENT));
365 * If we have a NULL data pointer
366 * then assume the id's aren't changing and
367 * return EEXIST to the dmu to let it know to
371 return (SET_ERROR(EEXIST));
373 if (bonustype == DMU_OT_ZNODE) {
374 znode_phys_t *znp = data;
375 *userp = znp->zp_uid;
376 *groupp = znp->zp_gid;
379 sa_hdr_phys_t *sap = data;
380 sa_hdr_phys_t sa = *sap;
381 boolean_t swap = B_FALSE;
383 ASSERT(bonustype == DMU_OT_SA);
385 if (sa.sa_magic == 0) {
387 * This should only happen for newly created
388 * files that haven't had the znode data filled
395 if (sa.sa_magic == BSWAP_32(SA_MAGIC)) {
396 sa.sa_magic = SA_MAGIC;
397 sa.sa_layout_info = BSWAP_16(sa.sa_layout_info);
400 VERIFY3U(sa.sa_magic, ==, SA_MAGIC);
403 hdrsize = sa_hdrsize(&sa);
404 VERIFY3U(hdrsize, >=, sizeof (sa_hdr_phys_t));
405 *userp = *((uint64_t *)((uintptr_t)data + hdrsize +
407 *groupp = *((uint64_t *)((uintptr_t)data + hdrsize +
410 *userp = BSWAP_64(*userp);
411 *groupp = BSWAP_64(*groupp);
418 fuidstr_to_sid(zfs_sb_t *zsb, const char *fuidstr,
419 char *domainbuf, int buflen, uid_t *ridp)
424 fuid = strtonum(fuidstr, NULL);
426 domain = zfs_fuid_find_by_idx(zsb, FUID_INDEX(fuid));
428 (void) strlcpy(domainbuf, domain, buflen);
431 *ridp = FUID_RID(fuid);
435 zfs_userquota_prop_to_obj(zfs_sb_t *zsb, zfs_userquota_prop_t type)
438 case ZFS_PROP_USERUSED:
439 return (DMU_USERUSED_OBJECT);
440 case ZFS_PROP_GROUPUSED:
441 return (DMU_GROUPUSED_OBJECT);
442 case ZFS_PROP_USERQUOTA:
443 return (zsb->z_userquota_obj);
444 case ZFS_PROP_GROUPQUOTA:
445 return (zsb->z_groupquota_obj);
447 return (SET_ERROR(ENOTSUP));
453 zfs_userspace_many(zfs_sb_t *zsb, zfs_userquota_prop_t type,
454 uint64_t *cookiep, void *vbuf, uint64_t *bufsizep)
459 zfs_useracct_t *buf = vbuf;
462 if (!dmu_objset_userspace_present(zsb->z_os))
463 return (SET_ERROR(ENOTSUP));
465 obj = zfs_userquota_prop_to_obj(zsb, type);
471 for (zap_cursor_init_serialized(&zc, zsb->z_os, obj, *cookiep);
472 (error = zap_cursor_retrieve(&zc, &za)) == 0;
473 zap_cursor_advance(&zc)) {
474 if ((uintptr_t)buf - (uintptr_t)vbuf + sizeof (zfs_useracct_t) >
478 fuidstr_to_sid(zsb, za.za_name,
479 buf->zu_domain, sizeof (buf->zu_domain), &buf->zu_rid);
481 buf->zu_space = za.za_first_integer;
487 ASSERT3U((uintptr_t)buf - (uintptr_t)vbuf, <=, *bufsizep);
488 *bufsizep = (uintptr_t)buf - (uintptr_t)vbuf;
489 *cookiep = zap_cursor_serialize(&zc);
490 zap_cursor_fini(&zc);
493 EXPORT_SYMBOL(zfs_userspace_many);
496 * buf must be big enough (eg, 32 bytes)
499 id_to_fuidstr(zfs_sb_t *zsb, const char *domain, uid_t rid,
500 char *buf, boolean_t addok)
505 if (domain && domain[0]) {
506 domainid = zfs_fuid_find_by_domain(zsb, domain, NULL, addok);
508 return (SET_ERROR(ENOENT));
510 fuid = FUID_ENCODE(domainid, rid);
511 (void) sprintf(buf, "%llx", (longlong_t)fuid);
516 zfs_userspace_one(zfs_sb_t *zsb, zfs_userquota_prop_t type,
517 const char *domain, uint64_t rid, uint64_t *valp)
525 if (!dmu_objset_userspace_present(zsb->z_os))
526 return (SET_ERROR(ENOTSUP));
528 obj = zfs_userquota_prop_to_obj(zsb, type);
532 err = id_to_fuidstr(zsb, domain, rid, buf, B_FALSE);
536 err = zap_lookup(zsb->z_os, obj, buf, 8, 1, valp);
541 EXPORT_SYMBOL(zfs_userspace_one);
544 zfs_set_userquota(zfs_sb_t *zsb, zfs_userquota_prop_t type,
545 const char *domain, uint64_t rid, uint64_t quota)
551 boolean_t fuid_dirtied;
553 if (type != ZFS_PROP_USERQUOTA && type != ZFS_PROP_GROUPQUOTA)
554 return (SET_ERROR(EINVAL));
556 if (zsb->z_version < ZPL_VERSION_USERSPACE)
557 return (SET_ERROR(ENOTSUP));
559 objp = (type == ZFS_PROP_USERQUOTA) ? &zsb->z_userquota_obj :
560 &zsb->z_groupquota_obj;
562 err = id_to_fuidstr(zsb, domain, rid, buf, B_TRUE);
565 fuid_dirtied = zsb->z_fuid_dirty;
567 tx = dmu_tx_create(zsb->z_os);
568 dmu_tx_hold_zap(tx, *objp ? *objp : DMU_NEW_OBJECT, B_TRUE, NULL);
570 dmu_tx_hold_zap(tx, MASTER_NODE_OBJ, B_TRUE,
571 zfs_userquota_prop_prefixes[type]);
574 zfs_fuid_txhold(zsb, tx);
575 err = dmu_tx_assign(tx, TXG_WAIT);
581 mutex_enter(&zsb->z_lock);
583 *objp = zap_create(zsb->z_os, DMU_OT_USERGROUP_QUOTA,
585 VERIFY(0 == zap_add(zsb->z_os, MASTER_NODE_OBJ,
586 zfs_userquota_prop_prefixes[type], 8, 1, objp, tx));
588 mutex_exit(&zsb->z_lock);
591 err = zap_remove(zsb->z_os, *objp, buf, tx);
595 err = zap_update(zsb->z_os, *objp, buf, 8, 1, "a, tx);
599 zfs_fuid_sync(zsb, tx);
603 EXPORT_SYMBOL(zfs_set_userquota);
606 zfs_fuid_overquota(zfs_sb_t *zsb, boolean_t isgroup, uint64_t fuid)
609 uint64_t used, quota, usedobj, quotaobj;
612 usedobj = isgroup ? DMU_GROUPUSED_OBJECT : DMU_USERUSED_OBJECT;
613 quotaobj = isgroup ? zsb->z_groupquota_obj : zsb->z_userquota_obj;
615 if (quotaobj == 0 || zsb->z_replay)
618 (void) sprintf(buf, "%llx", (longlong_t)fuid);
619 err = zap_lookup(zsb->z_os, quotaobj, buf, 8, 1, "a);
623 err = zap_lookup(zsb->z_os, usedobj, buf, 8, 1, &used);
626 return (used >= quota);
628 EXPORT_SYMBOL(zfs_fuid_overquota);
631 zfs_owner_overquota(zfs_sb_t *zsb, znode_t *zp, boolean_t isgroup)
636 quotaobj = isgroup ? zsb->z_groupquota_obj : zsb->z_userquota_obj;
638 fuid = isgroup ? zp->z_gid : zp->z_uid;
640 if (quotaobj == 0 || zsb->z_replay)
643 return (zfs_fuid_overquota(zsb, isgroup, fuid));
645 EXPORT_SYMBOL(zfs_owner_overquota);
648 zfs_sb_create(const char *osname, zfs_sb_t **zsbp)
656 zsb = kmem_zalloc(sizeof (zfs_sb_t), KM_SLEEP | KM_NODEBUG);
659 * We claim to always be readonly so we can open snapshots;
660 * other ZPL code will prevent us from writing to snapshots.
662 error = dmu_objset_own(osname, DMU_OST_ZFS, B_TRUE, zsb, &os);
664 kmem_free(zsb, sizeof (zfs_sb_t));
669 * Initialize the zfs-specific filesystem structure.
670 * Should probably make this a kmem cache, shuffle fields,
671 * and just bzero up to z_hold_mtx[].
675 zsb->z_max_blksz = SPA_MAXBLOCKSIZE;
676 zsb->z_show_ctldir = ZFS_SNAPDIR_VISIBLE;
679 error = zfs_get_zplprop(os, ZFS_PROP_VERSION, &zsb->z_version);
682 } else if (zsb->z_version >
683 zfs_zpl_version_map(spa_version(dmu_objset_spa(os)))) {
684 (void) printk("Can't mount a version %lld file system "
685 "on a version %lld pool\n. Pool must be upgraded to mount "
686 "this file system.", (u_longlong_t)zsb->z_version,
687 (u_longlong_t)spa_version(dmu_objset_spa(os)));
688 error = SET_ERROR(ENOTSUP);
691 if ((error = zfs_get_zplprop(os, ZFS_PROP_NORMALIZE, &zval)) != 0)
693 zsb->z_norm = (int)zval;
695 if ((error = zfs_get_zplprop(os, ZFS_PROP_UTF8ONLY, &zval)) != 0)
697 zsb->z_utf8 = (zval != 0);
699 if ((error = zfs_get_zplprop(os, ZFS_PROP_CASE, &zval)) != 0)
701 zsb->z_case = (uint_t)zval;
703 if ((error = zfs_get_zplprop(os, ZFS_PROP_ACLTYPE, &zval)) != 0)
705 zsb->z_acl_type = (uint_t)zval;
708 * Fold case on file systems that are always or sometimes case
711 if (zsb->z_case == ZFS_CASE_INSENSITIVE ||
712 zsb->z_case == ZFS_CASE_MIXED)
713 zsb->z_norm |= U8_TEXTPREP_TOUPPER;
715 zsb->z_use_fuids = USE_FUIDS(zsb->z_version, zsb->z_os);
716 zsb->z_use_sa = USE_SA(zsb->z_version, zsb->z_os);
719 /* should either have both of these objects or none */
720 error = zap_lookup(os, MASTER_NODE_OBJ, ZFS_SA_ATTRS, 8, 1,
725 error = zfs_get_zplprop(os, ZFS_PROP_XATTR, &zval);
726 if ((error == 0) && (zval == ZFS_XATTR_SA))
727 zsb->z_xattr_sa = B_TRUE;
730 * Pre SA versions file systems should never touch
731 * either the attribute registration or layout objects.
736 error = sa_setup(os, sa_obj, zfs_attr_table, ZPL_END,
741 if (zsb->z_version >= ZPL_VERSION_SA)
742 sa_register_update_callback(os, zfs_sa_upgrade);
744 error = zap_lookup(os, MASTER_NODE_OBJ, ZFS_ROOT_OBJ, 8, 1,
748 ASSERT(zsb->z_root != 0);
750 error = zap_lookup(os, MASTER_NODE_OBJ, ZFS_UNLINKED_SET, 8, 1,
751 &zsb->z_unlinkedobj);
755 error = zap_lookup(os, MASTER_NODE_OBJ,
756 zfs_userquota_prop_prefixes[ZFS_PROP_USERQUOTA],
757 8, 1, &zsb->z_userquota_obj);
758 if (error && error != ENOENT)
761 error = zap_lookup(os, MASTER_NODE_OBJ,
762 zfs_userquota_prop_prefixes[ZFS_PROP_GROUPQUOTA],
763 8, 1, &zsb->z_groupquota_obj);
764 if (error && error != ENOENT)
767 error = zap_lookup(os, MASTER_NODE_OBJ, ZFS_FUID_TABLES, 8, 1,
769 if (error && error != ENOENT)
772 error = zap_lookup(os, MASTER_NODE_OBJ, ZFS_SHARES_DIR, 8, 1,
774 if (error && error != ENOENT)
777 mutex_init(&zsb->z_znodes_lock, NULL, MUTEX_DEFAULT, NULL);
778 mutex_init(&zsb->z_lock, NULL, MUTEX_DEFAULT, NULL);
779 list_create(&zsb->z_all_znodes, sizeof (znode_t),
780 offsetof(znode_t, z_link_node));
781 rrw_init(&zsb->z_teardown_lock, B_FALSE);
782 rw_init(&zsb->z_teardown_inactive_lock, NULL, RW_DEFAULT, NULL);
783 rw_init(&zsb->z_fuid_lock, NULL, RW_DEFAULT, NULL);
784 for (i = 0; i != ZFS_OBJ_MTX_SZ; i++)
785 mutex_init(&zsb->z_hold_mtx[i], NULL, MUTEX_DEFAULT, NULL);
787 avl_create(&zsb->z_ctldir_snaps, snapentry_compare,
788 sizeof (zfs_snapentry_t), offsetof(zfs_snapentry_t, se_node));
789 mutex_init(&zsb->z_ctldir_lock, NULL, MUTEX_DEFAULT, NULL);
795 dmu_objset_disown(os, zsb);
797 kmem_free(zsb, sizeof (zfs_sb_t));
800 EXPORT_SYMBOL(zfs_sb_create);
803 zfs_sb_setup(zfs_sb_t *zsb, boolean_t mounting)
807 error = zfs_register_callbacks(zsb);
812 * Set the objset user_ptr to track its zsb.
814 mutex_enter(&zsb->z_os->os_user_ptr_lock);
815 dmu_objset_set_user(zsb->z_os, zsb);
816 mutex_exit(&zsb->z_os->os_user_ptr_lock);
818 zsb->z_log = zil_open(zsb->z_os, zfs_get_data);
821 * If we are not mounting (ie: online recv), then we don't
822 * have to worry about replaying the log as we blocked all
823 * operations out since we closed the ZIL.
829 * During replay we remove the read only flag to
830 * allow replays to succeed.
832 readonly = zfs_is_readonly(zsb);
834 readonly_changed_cb(zsb, B_FALSE);
836 zfs_unlinked_drain(zsb);
839 * Parse and replay the intent log.
841 * Because of ziltest, this must be done after
842 * zfs_unlinked_drain(). (Further note: ziltest
843 * doesn't use readonly mounts, where
844 * zfs_unlinked_drain() isn't called.) This is because
845 * ziltest causes spa_sync() to think it's committed,
846 * but actually it is not, so the intent log contains
847 * many txg's worth of changes.
849 * In particular, if object N is in the unlinked set in
850 * the last txg to actually sync, then it could be
851 * actually freed in a later txg and then reallocated
852 * in a yet later txg. This would write a "create
853 * object N" record to the intent log. Normally, this
854 * would be fine because the spa_sync() would have
855 * written out the fact that object N is free, before
856 * we could write the "create object N" intent log
859 * But when we are in ziltest mode, we advance the "open
860 * txg" without actually spa_sync()-ing the changes to
861 * disk. So we would see that object N is still
862 * allocated and in the unlinked set, and there is an
863 * intent log record saying to allocate it.
865 if (spa_writeable(dmu_objset_spa(zsb->z_os))) {
866 if (zil_replay_disable) {
867 zil_destroy(zsb->z_log, B_FALSE);
869 zsb->z_replay = B_TRUE;
870 zil_replay(zsb->z_os, zsb,
872 zsb->z_replay = B_FALSE;
876 /* restore readonly bit */
878 readonly_changed_cb(zsb, B_TRUE);
883 EXPORT_SYMBOL(zfs_sb_setup);
886 zfs_sb_free(zfs_sb_t *zsb)
890 zfs_fuid_destroy(zsb);
892 mutex_destroy(&zsb->z_znodes_lock);
893 mutex_destroy(&zsb->z_lock);
894 list_destroy(&zsb->z_all_znodes);
895 rrw_destroy(&zsb->z_teardown_lock);
896 rw_destroy(&zsb->z_teardown_inactive_lock);
897 rw_destroy(&zsb->z_fuid_lock);
898 for (i = 0; i != ZFS_OBJ_MTX_SZ; i++)
899 mutex_destroy(&zsb->z_hold_mtx[i]);
900 mutex_destroy(&zsb->z_ctldir_lock);
901 avl_destroy(&zsb->z_ctldir_snaps);
902 kmem_free(zsb, sizeof (zfs_sb_t));
904 EXPORT_SYMBOL(zfs_sb_free);
907 zfs_set_fuid_feature(zfs_sb_t *zsb)
909 zsb->z_use_fuids = USE_FUIDS(zsb->z_version, zsb->z_os);
910 zsb->z_use_sa = USE_SA(zsb->z_version, zsb->z_os);
914 zfs_unregister_callbacks(zfs_sb_t *zsb)
916 objset_t *os = zsb->z_os;
917 struct dsl_dataset *ds;
920 * Unregister properties.
922 if (!dmu_objset_is_snapshot(os)) {
923 ds = dmu_objset_ds(os);
924 VERIFY(dsl_prop_unregister(ds, "atime", atime_changed_cb,
927 VERIFY(dsl_prop_unregister(ds, "relatime", relatime_changed_cb,
930 VERIFY(dsl_prop_unregister(ds, "xattr", xattr_changed_cb,
933 VERIFY(dsl_prop_unregister(ds, "recordsize", blksz_changed_cb,
936 VERIFY(dsl_prop_unregister(ds, "readonly", readonly_changed_cb,
939 VERIFY(dsl_prop_unregister(ds, "devices", devices_changed_cb,
942 VERIFY(dsl_prop_unregister(ds, "setuid", setuid_changed_cb,
945 VERIFY(dsl_prop_unregister(ds, "exec", exec_changed_cb,
948 VERIFY(dsl_prop_unregister(ds, "snapdir", snapdir_changed_cb,
951 VERIFY(dsl_prop_unregister(ds, "acltype", acltype_changed_cb,
954 VERIFY(dsl_prop_unregister(ds, "aclinherit",
955 acl_inherit_changed_cb, zsb) == 0);
957 VERIFY(dsl_prop_unregister(ds, "vscan",
958 vscan_changed_cb, zsb) == 0);
960 VERIFY(dsl_prop_unregister(ds, "nbmand",
961 nbmand_changed_cb, zsb) == 0);
964 EXPORT_SYMBOL(zfs_unregister_callbacks);
968 * Check that the hex label string is appropriate for the dataset being
969 * mounted into the global_zone proper.
971 * Return an error if the hex label string is not default or
972 * admin_low/admin_high. For admin_low labels, the corresponding
973 * dataset must be readonly.
976 zfs_check_global_label(const char *dsname, const char *hexsl)
978 if (strcasecmp(hexsl, ZFS_MLSLABEL_DEFAULT) == 0)
980 if (strcasecmp(hexsl, ADMIN_HIGH) == 0)
982 if (strcasecmp(hexsl, ADMIN_LOW) == 0) {
983 /* must be readonly */
986 if (dsl_prop_get_integer(dsname,
987 zfs_prop_to_name(ZFS_PROP_READONLY), &rdonly, NULL))
988 return (SET_ERROR(EACCES));
989 return (rdonly ? 0 : EACCES);
991 return (SET_ERROR(EACCES));
993 EXPORT_SYMBOL(zfs_check_global_label);
994 #endif /* HAVE_MLSLABEL */
997 zfs_statvfs(struct dentry *dentry, struct kstatfs *statp)
999 zfs_sb_t *zsb = dentry->d_sb->s_fs_info;
1000 uint64_t refdbytes, availbytes, usedobjs, availobjs;
1006 dmu_objset_space(zsb->z_os,
1007 &refdbytes, &availbytes, &usedobjs, &availobjs);
1009 fsid = dmu_objset_fsid_guid(zsb->z_os);
1011 * The underlying storage pool actually uses multiple block
1012 * size. Under Solaris frsize (fragment size) is reported as
1013 * the smallest block size we support, and bsize (block size)
1014 * as the filesystem's maximum block size. Unfortunately,
1015 * under Linux the fragment size and block size are often used
1016 * interchangeably. Thus we are forced to report both of them
1017 * as the filesystem's maximum block size.
1019 statp->f_frsize = zsb->z_max_blksz;
1020 statp->f_bsize = zsb->z_max_blksz;
1021 bshift = fls(statp->f_bsize) - 1;
1024 * The following report "total" blocks of various kinds in
1025 * the file system, but reported in terms of f_bsize - the
1029 statp->f_blocks = (refdbytes + availbytes) >> bshift;
1030 statp->f_bfree = availbytes >> bshift;
1031 statp->f_bavail = statp->f_bfree; /* no root reservation */
1034 * statvfs() should really be called statufs(), because it assumes
1035 * static metadata. ZFS doesn't preallocate files, so the best
1036 * we can do is report the max that could possibly fit in f_files,
1037 * and that minus the number actually used in f_ffree.
1038 * For f_ffree, report the smaller of the number of object available
1039 * and the number of blocks (each object will take at least a block).
1041 statp->f_ffree = MIN(availobjs, availbytes >> DNODE_SHIFT);
1042 statp->f_files = statp->f_ffree + usedobjs;
1043 statp->f_fsid.val[0] = (uint32_t)fsid;
1044 statp->f_fsid.val[1] = (uint32_t)(fsid >> 32);
1045 statp->f_type = ZFS_SUPER_MAGIC;
1046 statp->f_namelen = ZFS_MAXNAMELEN;
1049 * We have all of 40 characters to stuff a string here.
1050 * Is there anything useful we could/should provide?
1052 bzero(statp->f_spare, sizeof (statp->f_spare));
1057 EXPORT_SYMBOL(zfs_statvfs);
1060 zfs_root(zfs_sb_t *zsb, struct inode **ipp)
1067 error = zfs_zget(zsb, zsb->z_root, &rootzp);
1069 *ipp = ZTOI(rootzp);
1074 EXPORT_SYMBOL(zfs_root);
1078 zfs_sb_prune(struct super_block *sb, unsigned long nr_to_scan, int *objects)
1080 zfs_sb_t *zsb = sb->s_fs_info;
1081 struct shrinker *shrinker = &sb->s_shrink;
1082 struct shrink_control sc = {
1083 .nr_to_scan = nr_to_scan,
1084 .gfp_mask = GFP_KERNEL,
1088 *objects = (*shrinker->shrink)(shrinker, &sc);
1093 EXPORT_SYMBOL(zfs_sb_prune);
1094 #endif /* HAVE_SHRINK */
1097 * Teardown the zfs_sb_t.
1099 * Note, if 'unmounting' if FALSE, we return with the 'z_teardown_lock'
1100 * and 'z_teardown_inactive_lock' held.
1103 zfs_sb_teardown(zfs_sb_t *zsb, boolean_t unmounting)
1108 * If someone has not already unmounted this file system,
1109 * drain the iput_taskq to ensure all active references to the
1110 * zfs_sb_t have been handled only then can it be safely destroyed.
1113 taskq_wait(dsl_pool_iput_taskq(dmu_objset_pool(zsb->z_os)));
1115 rrw_enter(&zsb->z_teardown_lock, RW_WRITER, FTAG);
1119 * We purge the parent filesystem's super block as the
1120 * parent filesystem and all of its snapshots have their
1121 * inode's super block set to the parent's filesystem's
1122 * super block. Note, 'z_parent' is self referential
1123 * for non-snapshots.
1125 shrink_dcache_sb(zsb->z_parent->z_sb);
1129 * Close the zil. NB: Can't close the zil while zfs_inactive
1130 * threads are blocked as zil_close can call zfs_inactive.
1133 zil_close(zsb->z_log);
1137 rw_enter(&zsb->z_teardown_inactive_lock, RW_WRITER);
1140 * If we are not unmounting (ie: online recv) and someone already
1141 * unmounted this file system while we were doing the switcheroo,
1142 * or a reopen of z_os failed then just bail out now.
1144 if (!unmounting && (zsb->z_unmounted || zsb->z_os == NULL)) {
1145 rw_exit(&zsb->z_teardown_inactive_lock);
1146 rrw_exit(&zsb->z_teardown_lock, FTAG);
1147 return (SET_ERROR(EIO));
1151 * At this point there are no VFS ops active, and any new VFS ops
1152 * will fail with EIO since we have z_teardown_lock for writer (only
1153 * relevant for forced unmount).
1155 * Release all holds on dbufs.
1157 mutex_enter(&zsb->z_znodes_lock);
1158 for (zp = list_head(&zsb->z_all_znodes); zp != NULL;
1159 zp = list_next(&zsb->z_all_znodes, zp)) {
1161 zfs_znode_dmu_fini(zp);
1163 mutex_exit(&zsb->z_znodes_lock);
1166 * If we are unmounting, set the unmounted flag and let new VFS ops
1167 * unblock. zfs_inactive will have the unmounted behavior, and all
1168 * other VFS ops will fail with EIO.
1171 zsb->z_unmounted = B_TRUE;
1172 rrw_exit(&zsb->z_teardown_lock, FTAG);
1173 rw_exit(&zsb->z_teardown_inactive_lock);
1177 * z_os will be NULL if there was an error in attempting to reopen
1178 * zsb, so just return as the properties had already been
1180 * unregistered and cached data had been evicted before.
1182 if (zsb->z_os == NULL)
1186 * Unregister properties.
1188 zfs_unregister_callbacks(zsb);
1193 if (dsl_dataset_is_dirty(dmu_objset_ds(zsb->z_os)) &&
1194 !zfs_is_readonly(zsb))
1195 txg_wait_synced(dmu_objset_pool(zsb->z_os), 0);
1196 dmu_objset_evict_dbufs(zsb->z_os);
1200 EXPORT_SYMBOL(zfs_sb_teardown);
1202 #if defined(HAVE_BDI) && !defined(HAVE_BDI_SETUP_AND_REGISTER)
1203 atomic_long_t zfs_bdi_seq = ATOMIC_LONG_INIT(0);
1204 #endif /* HAVE_BDI && !HAVE_BDI_SETUP_AND_REGISTER */
1207 zfs_domount(struct super_block *sb, void *data, int silent)
1209 zpl_mount_data_t *zmd = data;
1210 const char *osname = zmd->z_osname;
1212 struct inode *root_inode;
1213 uint64_t recordsize;
1216 error = zfs_sb_create(osname, &zsb);
1220 if ((error = dsl_prop_get_integer(osname, "recordsize",
1221 &recordsize, NULL)))
1225 sb->s_fs_info = zsb;
1226 sb->s_magic = ZFS_SUPER_MAGIC;
1227 sb->s_maxbytes = MAX_LFS_FILESIZE;
1228 sb->s_time_gran = 1;
1229 sb->s_blocksize = recordsize;
1230 sb->s_blocksize_bits = ilog2(recordsize);
1234 * 2.6.32 API change,
1235 * Added backing_device_info (BDI) per super block interfaces. A BDI
1236 * must be configured when using a non-device backed filesystem for
1237 * proper writeback. This is not required for older pdflush kernels.
1239 * NOTE: Linux read-ahead is disabled in favor of zfs read-ahead.
1241 zsb->z_bdi.ra_pages = 0;
1242 sb->s_bdi = &zsb->z_bdi;
1244 error = -bdi_setup_and_register(&zsb->z_bdi, "zfs", BDI_CAP_MAP_COPY);
1247 #endif /* HAVE_BDI */
1249 /* Set callback operations for the file system. */
1250 sb->s_op = &zpl_super_operations;
1251 sb->s_xattr = zpl_xattr_handlers;
1252 sb->s_export_op = &zpl_export_operations;
1254 sb->s_d_op = &zpl_dentry_operations;
1255 #endif /* HAVE_S_D_OP */
1257 /* Set features for file system. */
1258 zfs_set_fuid_feature(zsb);
1260 if (dmu_objset_is_snapshot(zsb->z_os)) {
1263 atime_changed_cb(zsb, B_FALSE);
1264 readonly_changed_cb(zsb, B_TRUE);
1265 if ((error = dsl_prop_get_integer(osname,
1266 "xattr", &pval, NULL)))
1268 xattr_changed_cb(zsb, pval);
1269 if ((error = dsl_prop_get_integer(osname,
1270 "acltype", &pval, NULL)))
1272 acltype_changed_cb(zsb, pval);
1273 zsb->z_issnap = B_TRUE;
1274 zsb->z_os->os_sync = ZFS_SYNC_DISABLED;
1276 mutex_enter(&zsb->z_os->os_user_ptr_lock);
1277 dmu_objset_set_user(zsb->z_os, zsb);
1278 mutex_exit(&zsb->z_os->os_user_ptr_lock);
1280 error = zfs_sb_setup(zsb, B_TRUE);
1283 /* Allocate a root inode for the filesystem. */
1284 error = zfs_root(zsb, &root_inode);
1286 (void) zfs_umount(sb);
1290 /* Allocate a root dentry for the filesystem */
1291 sb->s_root = d_make_root(root_inode);
1292 if (sb->s_root == NULL) {
1293 (void) zfs_umount(sb);
1294 error = SET_ERROR(ENOMEM);
1302 dmu_objset_disown(zsb->z_os, zsb);
1308 EXPORT_SYMBOL(zfs_domount);
1311 * Called when an unmount is requested and certain sanity checks have
1312 * already passed. At this point no dentries or inodes have been reclaimed
1313 * from their respective caches. We drop the extra reference on the .zfs
1314 * control directory to allow everything to be reclaimed. All snapshots
1315 * must already have been unmounted to reach this point.
1318 zfs_preumount(struct super_block *sb)
1320 zfs_sb_t *zsb = sb->s_fs_info;
1322 if (zsb != NULL && zsb->z_ctldir != NULL)
1323 zfsctl_destroy(zsb);
1325 EXPORT_SYMBOL(zfs_preumount);
1328 * Called once all other unmount released tear down has occurred.
1329 * It is our responsibility to release any remaining infrastructure.
1333 zfs_umount(struct super_block *sb)
1335 zfs_sb_t *zsb = sb->s_fs_info;
1338 VERIFY(zfs_sb_teardown(zsb, B_TRUE) == 0);
1342 bdi_destroy(sb->s_bdi);
1343 #endif /* HAVE_BDI */
1346 * z_os will be NULL if there was an error in
1347 * attempting to reopen zsb.
1351 * Unset the objset user_ptr.
1353 mutex_enter(&os->os_user_ptr_lock);
1354 dmu_objset_set_user(os, NULL);
1355 mutex_exit(&os->os_user_ptr_lock);
1358 * Finally release the objset
1360 dmu_objset_disown(os, zsb);
1366 EXPORT_SYMBOL(zfs_umount);
1369 zfs_remount(struct super_block *sb, int *flags, char *data)
1372 * All namespace flags (MNT_*) and super block flags (MS_*) will
1373 * be handled by the Linux VFS. Only handle custom options here.
1377 EXPORT_SYMBOL(zfs_remount);
1380 zfs_vget(struct super_block *sb, struct inode **ipp, fid_t *fidp)
1382 zfs_sb_t *zsb = sb->s_fs_info;
1384 uint64_t object = 0;
1385 uint64_t fid_gen = 0;
1394 if (fidp->fid_len == LONG_FID_LEN) {
1395 zfid_long_t *zlfid = (zfid_long_t *)fidp;
1396 uint64_t objsetid = 0;
1397 uint64_t setgen = 0;
1399 for (i = 0; i < sizeof (zlfid->zf_setid); i++)
1400 objsetid |= ((uint64_t)zlfid->zf_setid[i]) << (8 * i);
1402 for (i = 0; i < sizeof (zlfid->zf_setgen); i++)
1403 setgen |= ((uint64_t)zlfid->zf_setgen[i]) << (8 * i);
1407 err = zfsctl_lookup_objset(sb, objsetid, &zsb);
1409 return (SET_ERROR(EINVAL));
1414 if (fidp->fid_len == SHORT_FID_LEN || fidp->fid_len == LONG_FID_LEN) {
1415 zfid_short_t *zfid = (zfid_short_t *)fidp;
1417 for (i = 0; i < sizeof (zfid->zf_object); i++)
1418 object |= ((uint64_t)zfid->zf_object[i]) << (8 * i);
1420 for (i = 0; i < sizeof (zfid->zf_gen); i++)
1421 fid_gen |= ((uint64_t)zfid->zf_gen[i]) << (8 * i);
1424 return (SET_ERROR(EINVAL));
1427 /* A zero fid_gen means we are in the .zfs control directories */
1429 (object == ZFSCTL_INO_ROOT || object == ZFSCTL_INO_SNAPDIR)) {
1430 *ipp = zsb->z_ctldir;
1431 ASSERT(*ipp != NULL);
1432 if (object == ZFSCTL_INO_SNAPDIR) {
1433 VERIFY(zfsctl_root_lookup(*ipp, "snapshot", ipp,
1434 0, kcred, NULL, NULL) == 0);
1442 gen_mask = -1ULL >> (64 - 8 * i);
1444 dprintf("getting %llu [%u mask %llx]\n", object, fid_gen, gen_mask);
1445 if ((err = zfs_zget(zsb, object, &zp))) {
1449 (void) sa_lookup(zp->z_sa_hdl, SA_ZPL_GEN(zsb), &zp_gen,
1451 zp_gen = zp_gen & gen_mask;
1454 if (zp->z_unlinked || zp_gen != fid_gen) {
1455 dprintf("znode gen (%u) != fid gen (%u)\n", zp_gen, fid_gen);
1458 return (SET_ERROR(EINVAL));
1463 zfs_inode_update(ITOZ(*ipp));
1468 EXPORT_SYMBOL(zfs_vget);
1471 * Block out VFS ops and close zfs_sb_t
1473 * Note, if successful, then we return with the 'z_teardown_lock' and
1474 * 'z_teardown_inactive_lock' write held. We leave ownership of the underlying
1475 * dataset and objset intact so that they can be atomically handed off during
1476 * a subsequent rollback or recv operation and the resume thereafter.
1479 zfs_suspend_fs(zfs_sb_t *zsb)
1483 if ((error = zfs_sb_teardown(zsb, B_FALSE)) != 0)
1488 EXPORT_SYMBOL(zfs_suspend_fs);
1491 * Reopen zfs_sb_t and release VFS ops.
1494 zfs_resume_fs(zfs_sb_t *zsb, const char *osname)
1498 uint64_t sa_obj = 0;
1500 ASSERT(RRW_WRITE_HELD(&zsb->z_teardown_lock));
1501 ASSERT(RW_WRITE_HELD(&zsb->z_teardown_inactive_lock));
1504 * We already own this, so just hold and rele it to update the
1505 * objset_t, as the one we had before may have been evicted.
1507 VERIFY0(dmu_objset_hold(osname, zsb, &zsb->z_os));
1508 VERIFY3P(zsb->z_os->os_dsl_dataset->ds_owner, ==, zsb);
1509 VERIFY(dsl_dataset_long_held(zsb->z_os->os_dsl_dataset));
1510 dmu_objset_rele(zsb->z_os, zsb);
1513 * Make sure version hasn't changed
1516 err = zfs_get_zplprop(zsb->z_os, ZFS_PROP_VERSION,
1522 err = zap_lookup(zsb->z_os, MASTER_NODE_OBJ,
1523 ZFS_SA_ATTRS, 8, 1, &sa_obj);
1525 if (err && zsb->z_version >= ZPL_VERSION_SA)
1528 if ((err = sa_setup(zsb->z_os, sa_obj,
1529 zfs_attr_table, ZPL_END, &zsb->z_attr_table)) != 0)
1532 if (zsb->z_version >= ZPL_VERSION_SA)
1533 sa_register_update_callback(zsb->z_os,
1536 VERIFY(zfs_sb_setup(zsb, B_FALSE) == 0);
1538 zfs_set_fuid_feature(zsb);
1539 zsb->z_rollback_time = jiffies;
1542 * Attempt to re-establish all the active inodes with their
1543 * dbufs. If a zfs_rezget() fails, then we unhash the inode
1544 * and mark it stale. This prevents a collision if a new
1545 * inode/object is created which must use the same inode
1546 * number. The stale inode will be be released when the
1547 * VFS prunes the dentry holding the remaining references
1548 * on the stale inode.
1550 mutex_enter(&zsb->z_znodes_lock);
1551 for (zp = list_head(&zsb->z_all_znodes); zp;
1552 zp = list_next(&zsb->z_all_znodes, zp)) {
1553 err2 = zfs_rezget(zp);
1555 remove_inode_hash(ZTOI(zp));
1556 zp->z_is_stale = B_TRUE;
1559 mutex_exit(&zsb->z_znodes_lock);
1562 /* release the VFS ops */
1563 rw_exit(&zsb->z_teardown_inactive_lock);
1564 rrw_exit(&zsb->z_teardown_lock, FTAG);
1568 * Since we couldn't setup the sa framework, try to force
1569 * unmount this file system.
1572 (void) zfs_umount(zsb->z_sb);
1576 EXPORT_SYMBOL(zfs_resume_fs);
1579 zfs_set_version(zfs_sb_t *zsb, uint64_t newvers)
1582 objset_t *os = zsb->z_os;
1585 if (newvers < ZPL_VERSION_INITIAL || newvers > ZPL_VERSION)
1586 return (SET_ERROR(EINVAL));
1588 if (newvers < zsb->z_version)
1589 return (SET_ERROR(EINVAL));
1591 if (zfs_spa_version_map(newvers) >
1592 spa_version(dmu_objset_spa(zsb->z_os)))
1593 return (SET_ERROR(ENOTSUP));
1595 tx = dmu_tx_create(os);
1596 dmu_tx_hold_zap(tx, MASTER_NODE_OBJ, B_FALSE, ZPL_VERSION_STR);
1597 if (newvers >= ZPL_VERSION_SA && !zsb->z_use_sa) {
1598 dmu_tx_hold_zap(tx, MASTER_NODE_OBJ, B_TRUE,
1600 dmu_tx_hold_zap(tx, DMU_NEW_OBJECT, FALSE, NULL);
1602 error = dmu_tx_assign(tx, TXG_WAIT);
1608 error = zap_update(os, MASTER_NODE_OBJ, ZPL_VERSION_STR,
1609 8, 1, &newvers, tx);
1616 if (newvers >= ZPL_VERSION_SA && !zsb->z_use_sa) {
1619 ASSERT3U(spa_version(dmu_objset_spa(zsb->z_os)), >=,
1621 sa_obj = zap_create(os, DMU_OT_SA_MASTER_NODE,
1622 DMU_OT_NONE, 0, tx);
1624 error = zap_add(os, MASTER_NODE_OBJ,
1625 ZFS_SA_ATTRS, 8, 1, &sa_obj, tx);
1628 VERIFY(0 == sa_set_sa_object(os, sa_obj));
1629 sa_register_update_callback(os, zfs_sa_upgrade);
1632 spa_history_log_internal_ds(dmu_objset_ds(os), "upgrade", tx,
1633 "from %llu to %llu", zsb->z_version, newvers);
1637 zsb->z_version = newvers;
1639 zfs_set_fuid_feature(zsb);
1643 EXPORT_SYMBOL(zfs_set_version);
1646 * Read a property stored within the master node.
1649 zfs_get_zplprop(objset_t *os, zfs_prop_t prop, uint64_t *value)
1652 int error = SET_ERROR(ENOENT);
1655 * Look up the file system's value for the property. For the
1656 * version property, we look up a slightly different string.
1658 if (prop == ZFS_PROP_VERSION)
1659 pname = ZPL_VERSION_STR;
1661 pname = zfs_prop_to_name(prop);
1664 error = zap_lookup(os, MASTER_NODE_OBJ, pname, 8, 1, value);
1666 if (error == ENOENT) {
1667 /* No value set, use the default value */
1669 case ZFS_PROP_VERSION:
1670 *value = ZPL_VERSION;
1672 case ZFS_PROP_NORMALIZE:
1673 case ZFS_PROP_UTF8ONLY:
1677 *value = ZFS_CASE_SENSITIVE;
1679 case ZFS_PROP_ACLTYPE:
1680 *value = ZFS_ACLTYPE_OFF;
1689 EXPORT_SYMBOL(zfs_get_zplprop);
1696 dmu_objset_register_type(DMU_OST_ZFS, zfs_space_delta_cb);
1697 register_filesystem(&zpl_fs_type);
1698 (void) arc_add_prune_callback(zpl_prune_sbs, NULL);
1704 taskq_wait(system_taskq);
1705 unregister_filesystem(&zpl_fs_type);