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.
25 /* Portions Copyright 2010 Robert Milkowski */
27 #include <sys/types.h>
28 #include <sys/param.h>
29 #include <sys/systm.h>
30 #include <sys/sysmacros.h>
32 #include <sys/pathname.h>
33 #include <sys/vnode.h>
35 #include <sys/vfs_opreg.h>
36 #include <sys/mntent.h>
37 #include <sys/mount.h>
38 #include <sys/cmn_err.h>
39 #include "fs/fs_subr.h"
40 #include <sys/zfs_znode.h>
41 #include <sys/zfs_dir.h>
43 #include <sys/fs/zfs.h>
45 #include <sys/dsl_prop.h>
46 #include <sys/dsl_dataset.h>
47 #include <sys/dsl_deleg.h>
51 #include <sys/varargs.h>
52 #include <sys/policy.h>
53 #include <sys/atomic.h>
54 #include <sys/mkdev.h>
55 #include <sys/modctl.h>
56 #include <sys/refstr.h>
57 #include <sys/zfs_ioctl.h>
58 #include <sys/zfs_ctldir.h>
59 #include <sys/zfs_fuid.h>
60 #include <sys/bootconf.h>
61 #include <sys/sunddi.h>
63 #include <sys/dmu_objset.h>
64 #include <sys/spa_boot.h>
66 #include "zfs_comutil.h"
69 vfsops_t
*zfs_vfsops
= NULL
;
70 static major_t zfs_major
;
71 static minor_t zfs_minor
;
72 static kmutex_t zfs_dev_mtx
;
74 extern int sys_shutdown
;
76 static int zfs_mount(vfs_t
*vfsp
, vnode_t
*mvp
, struct mounta
*uap
, cred_t
*cr
);
77 static int zfs_umount(vfs_t
*vfsp
, int fflag
, cred_t
*cr
);
78 static int zfs_mountroot(vfs_t
*vfsp
, enum whymountroot
);
79 static int zfs_root(vfs_t
*vfsp
, vnode_t
**vpp
);
80 static int zfs_statvfs(vfs_t
*vfsp
, struct statvfs64
*statp
);
81 static int zfs_vget(vfs_t
*vfsp
, vnode_t
**vpp
, fid_t
*fidp
);
82 static void zfs_freevfs(vfs_t
*vfsp
);
84 static const fs_operation_def_t zfs_vfsops_template
[] = {
85 VFSNAME_MOUNT
, { .vfs_mount
= zfs_mount
},
86 VFSNAME_MOUNTROOT
, { .vfs_mountroot
= zfs_mountroot
},
87 VFSNAME_UNMOUNT
, { .vfs_unmount
= zfs_umount
},
88 VFSNAME_ROOT
, { .vfs_root
= zfs_root
},
89 VFSNAME_STATVFS
, { .vfs_statvfs
= zfs_statvfs
},
90 VFSNAME_SYNC
, { .vfs_sync
= zfs_sync
},
91 VFSNAME_VGET
, { .vfs_vget
= zfs_vget
},
92 VFSNAME_FREEVFS
, { .vfs_freevfs
= zfs_freevfs
},
96 static const fs_operation_def_t zfs_vfsops_eio_template
[] = {
97 VFSNAME_FREEVFS
, { .vfs_freevfs
= zfs_freevfs
},
102 * We need to keep a count of active fs's.
103 * This is necessary to prevent our module
104 * from being unloaded after a umount -f
106 static uint32_t zfs_active_fs_count
= 0;
108 static char *noatime_cancel
[] = { MNTOPT_ATIME
, NULL
};
109 static char *atime_cancel
[] = { MNTOPT_NOATIME
, NULL
};
110 static char *noxattr_cancel
[] = { MNTOPT_XATTR
, NULL
};
111 static char *xattr_cancel
[] = { MNTOPT_NOXATTR
, NULL
};
114 * MO_DEFAULT is not used since the default value is determined
115 * by the equivalent property.
117 static mntopt_t mntopts
[] = {
118 { MNTOPT_NOXATTR
, noxattr_cancel
, NULL
, 0, NULL
},
119 { MNTOPT_XATTR
, xattr_cancel
, NULL
, 0, NULL
},
120 { MNTOPT_NOATIME
, noatime_cancel
, NULL
, 0, NULL
},
121 { MNTOPT_ATIME
, atime_cancel
, NULL
, 0, NULL
}
124 static mntopts_t zfs_mntopts
= {
125 sizeof (mntopts
) / sizeof (mntopt_t
),
131 zfs_sync(vfs_t
*vfsp
, short flag
, cred_t
*cr
)
134 * Data integrity is job one. We don't want a compromised kernel
135 * writing to the storage pool, so we never sync during panic.
141 * SYNC_ATTR is used by fsflush() to force old filesystems like UFS
142 * to sync metadata, which they would otherwise cache indefinitely.
143 * Semantically, the only requirement is that the sync be initiated.
144 * The DMU syncs out txgs frequently, so there's nothing to do.
146 if (flag
& SYNC_ATTR
)
151 * Sync a specific filesystem.
153 zfsvfs_t
*zfsvfs
= vfsp
->vfs_data
;
157 dp
= dmu_objset_pool(zfsvfs
->z_os
);
160 * If the system is shutting down, then skip any
161 * filesystems which may exist on a suspended pool.
163 if (sys_shutdown
&& spa_suspended(dp
->dp_spa
)) {
168 if (zfsvfs
->z_log
!= NULL
)
169 zil_commit(zfsvfs
->z_log
, 0);
174 * Sync all ZFS filesystems. This is what happens when you
175 * run sync(1M). Unlike other filesystems, ZFS honors the
176 * request by waiting for all pools to commit all dirty data.
185 zfs_create_unique_device(dev_t
*dev
)
190 ASSERT3U(zfs_minor
, <=, MAXMIN32
);
191 minor_t start
= zfs_minor
;
193 mutex_enter(&zfs_dev_mtx
);
194 if (zfs_minor
>= MAXMIN32
) {
196 * If we're still using the real major
197 * keep out of /dev/zfs and /dev/zvol minor
198 * number space. If we're using a getudev()'ed
199 * major number, we can use all of its minors.
201 if (zfs_major
== ddi_name_to_major(ZFS_DRIVER
))
202 zfs_minor
= ZFS_MIN_MINOR
;
208 *dev
= makedevice(zfs_major
, zfs_minor
);
209 mutex_exit(&zfs_dev_mtx
);
210 } while (vfs_devismounted(*dev
) && zfs_minor
!= start
);
211 if (zfs_minor
== start
) {
213 * We are using all ~262,000 minor numbers for the
214 * current major number. Create a new major number.
216 if ((new_major
= getudev()) == (major_t
)-1) {
218 "zfs_mount: Can't get unique major "
222 mutex_enter(&zfs_dev_mtx
);
223 zfs_major
= new_major
;
226 mutex_exit(&zfs_dev_mtx
);
230 /* CONSTANTCONDITION */
237 atime_changed_cb(void *arg
, uint64_t newval
)
239 zfsvfs_t
*zfsvfs
= arg
;
241 if (newval
== TRUE
) {
242 zfsvfs
->z_atime
= TRUE
;
243 vfs_clearmntopt(zfsvfs
->z_vfs
, MNTOPT_NOATIME
);
244 vfs_setmntopt(zfsvfs
->z_vfs
, MNTOPT_ATIME
, NULL
, 0);
246 zfsvfs
->z_atime
= FALSE
;
247 vfs_clearmntopt(zfsvfs
->z_vfs
, MNTOPT_ATIME
);
248 vfs_setmntopt(zfsvfs
->z_vfs
, MNTOPT_NOATIME
, NULL
, 0);
253 xattr_changed_cb(void *arg
, uint64_t newval
)
255 zfsvfs_t
*zfsvfs
= arg
;
257 if (newval
== TRUE
) {
258 /* XXX locking on vfs_flag? */
259 zfsvfs
->z_vfs
->vfs_flag
|= VFS_XATTR
;
260 vfs_clearmntopt(zfsvfs
->z_vfs
, MNTOPT_NOXATTR
);
261 vfs_setmntopt(zfsvfs
->z_vfs
, MNTOPT_XATTR
, NULL
, 0);
263 /* XXX locking on vfs_flag? */
264 zfsvfs
->z_vfs
->vfs_flag
&= ~VFS_XATTR
;
265 vfs_clearmntopt(zfsvfs
->z_vfs
, MNTOPT_XATTR
);
266 vfs_setmntopt(zfsvfs
->z_vfs
, MNTOPT_NOXATTR
, NULL
, 0);
271 blksz_changed_cb(void *arg
, uint64_t newval
)
273 zfsvfs_t
*zfsvfs
= arg
;
275 if (newval
< SPA_MINBLOCKSIZE
||
276 newval
> SPA_MAXBLOCKSIZE
|| !ISP2(newval
))
277 newval
= SPA_MAXBLOCKSIZE
;
279 zfsvfs
->z_max_blksz
= newval
;
280 zfsvfs
->z_vfs
->vfs_bsize
= newval
;
284 readonly_changed_cb(void *arg
, uint64_t newval
)
286 zfsvfs_t
*zfsvfs
= arg
;
289 /* XXX locking on vfs_flag? */
290 zfsvfs
->z_vfs
->vfs_flag
|= VFS_RDONLY
;
291 vfs_clearmntopt(zfsvfs
->z_vfs
, MNTOPT_RW
);
292 vfs_setmntopt(zfsvfs
->z_vfs
, MNTOPT_RO
, NULL
, 0);
294 /* XXX locking on vfs_flag? */
295 zfsvfs
->z_vfs
->vfs_flag
&= ~VFS_RDONLY
;
296 vfs_clearmntopt(zfsvfs
->z_vfs
, MNTOPT_RO
);
297 vfs_setmntopt(zfsvfs
->z_vfs
, MNTOPT_RW
, NULL
, 0);
302 devices_changed_cb(void *arg
, uint64_t newval
)
304 zfsvfs_t
*zfsvfs
= arg
;
306 if (newval
== FALSE
) {
307 zfsvfs
->z_vfs
->vfs_flag
|= VFS_NODEVICES
;
308 vfs_clearmntopt(zfsvfs
->z_vfs
, MNTOPT_DEVICES
);
309 vfs_setmntopt(zfsvfs
->z_vfs
, MNTOPT_NODEVICES
, NULL
, 0);
311 zfsvfs
->z_vfs
->vfs_flag
&= ~VFS_NODEVICES
;
312 vfs_clearmntopt(zfsvfs
->z_vfs
, MNTOPT_NODEVICES
);
313 vfs_setmntopt(zfsvfs
->z_vfs
, MNTOPT_DEVICES
, NULL
, 0);
318 setuid_changed_cb(void *arg
, uint64_t newval
)
320 zfsvfs_t
*zfsvfs
= arg
;
322 if (newval
== FALSE
) {
323 zfsvfs
->z_vfs
->vfs_flag
|= VFS_NOSETUID
;
324 vfs_clearmntopt(zfsvfs
->z_vfs
, MNTOPT_SETUID
);
325 vfs_setmntopt(zfsvfs
->z_vfs
, MNTOPT_NOSETUID
, NULL
, 0);
327 zfsvfs
->z_vfs
->vfs_flag
&= ~VFS_NOSETUID
;
328 vfs_clearmntopt(zfsvfs
->z_vfs
, MNTOPT_NOSETUID
);
329 vfs_setmntopt(zfsvfs
->z_vfs
, MNTOPT_SETUID
, NULL
, 0);
334 exec_changed_cb(void *arg
, uint64_t newval
)
336 zfsvfs_t
*zfsvfs
= arg
;
338 if (newval
== FALSE
) {
339 zfsvfs
->z_vfs
->vfs_flag
|= VFS_NOEXEC
;
340 vfs_clearmntopt(zfsvfs
->z_vfs
, MNTOPT_EXEC
);
341 vfs_setmntopt(zfsvfs
->z_vfs
, MNTOPT_NOEXEC
, NULL
, 0);
343 zfsvfs
->z_vfs
->vfs_flag
&= ~VFS_NOEXEC
;
344 vfs_clearmntopt(zfsvfs
->z_vfs
, MNTOPT_NOEXEC
);
345 vfs_setmntopt(zfsvfs
->z_vfs
, MNTOPT_EXEC
, NULL
, 0);
350 * The nbmand mount option can be changed at mount time.
351 * We can't allow it to be toggled on live file systems or incorrect
352 * behavior may be seen from cifs clients
354 * This property isn't registered via dsl_prop_register(), but this callback
355 * will be called when a file system is first mounted
358 nbmand_changed_cb(void *arg
, uint64_t newval
)
360 zfsvfs_t
*zfsvfs
= arg
;
361 if (newval
== FALSE
) {
362 vfs_clearmntopt(zfsvfs
->z_vfs
, MNTOPT_NBMAND
);
363 vfs_setmntopt(zfsvfs
->z_vfs
, MNTOPT_NONBMAND
, NULL
, 0);
365 vfs_clearmntopt(zfsvfs
->z_vfs
, MNTOPT_NONBMAND
);
366 vfs_setmntopt(zfsvfs
->z_vfs
, MNTOPT_NBMAND
, NULL
, 0);
371 snapdir_changed_cb(void *arg
, uint64_t newval
)
373 zfsvfs_t
*zfsvfs
= arg
;
375 zfsvfs
->z_show_ctldir
= newval
;
379 vscan_changed_cb(void *arg
, uint64_t newval
)
381 zfsvfs_t
*zfsvfs
= arg
;
383 zfsvfs
->z_vscan
= newval
;
387 acl_mode_changed_cb(void *arg
, uint64_t newval
)
389 zfsvfs_t
*zfsvfs
= arg
;
391 zfsvfs
->z_acl_mode
= newval
;
395 acl_inherit_changed_cb(void *arg
, uint64_t newval
)
397 zfsvfs_t
*zfsvfs
= arg
;
399 zfsvfs
->z_acl_inherit
= newval
;
403 zfs_register_callbacks(vfs_t
*vfsp
)
405 struct dsl_dataset
*ds
= NULL
;
407 zfsvfs_t
*zfsvfs
= NULL
;
409 int readonly
, do_readonly
= B_FALSE
;
410 int setuid
, do_setuid
= B_FALSE
;
411 int exec
, do_exec
= B_FALSE
;
412 int devices
, do_devices
= B_FALSE
;
413 int xattr
, do_xattr
= B_FALSE
;
414 int atime
, do_atime
= B_FALSE
;
418 zfsvfs
= vfsp
->vfs_data
;
423 * The act of registering our callbacks will destroy any mount
424 * options we may have. In order to enable temporary overrides
425 * of mount options, we stash away the current values and
426 * restore them after we register the callbacks.
428 if (vfs_optionisset(vfsp
, MNTOPT_RO
, NULL
) ||
429 !spa_writeable(dmu_objset_spa(os
))) {
431 do_readonly
= B_TRUE
;
432 } else if (vfs_optionisset(vfsp
, MNTOPT_RW
, NULL
)) {
434 do_readonly
= B_TRUE
;
436 if (vfs_optionisset(vfsp
, MNTOPT_NOSUID
, NULL
)) {
442 if (vfs_optionisset(vfsp
, MNTOPT_NODEVICES
, NULL
)) {
445 } else if (vfs_optionisset(vfsp
, MNTOPT_DEVICES
, NULL
)) {
450 if (vfs_optionisset(vfsp
, MNTOPT_NOSETUID
, NULL
)) {
453 } else if (vfs_optionisset(vfsp
, MNTOPT_SETUID
, NULL
)) {
458 if (vfs_optionisset(vfsp
, MNTOPT_NOEXEC
, NULL
)) {
461 } else if (vfs_optionisset(vfsp
, MNTOPT_EXEC
, NULL
)) {
465 if (vfs_optionisset(vfsp
, MNTOPT_NOXATTR
, NULL
)) {
468 } else if (vfs_optionisset(vfsp
, MNTOPT_XATTR
, NULL
)) {
472 if (vfs_optionisset(vfsp
, MNTOPT_NOATIME
, NULL
)) {
475 } else if (vfs_optionisset(vfsp
, MNTOPT_ATIME
, NULL
)) {
481 * nbmand is a special property. It can only be changed at
484 * This is weird, but it is documented to only be changeable
487 if (vfs_optionisset(vfsp
, MNTOPT_NONBMAND
, NULL
)) {
489 } else if (vfs_optionisset(vfsp
, MNTOPT_NBMAND
, NULL
)) {
492 char osname
[MAXNAMELEN
];
494 dmu_objset_name(os
, osname
);
495 if (error
= dsl_prop_get_integer(osname
, "nbmand", &nbmand
,
502 * Register property callbacks.
504 * It would probably be fine to just check for i/o error from
505 * the first prop_register(), but I guess I like to go
508 ds
= dmu_objset_ds(os
);
509 error
= dsl_prop_register(ds
, "atime", atime_changed_cb
, zfsvfs
);
510 error
= error
? error
: dsl_prop_register(ds
,
511 "xattr", xattr_changed_cb
, zfsvfs
);
512 error
= error
? error
: dsl_prop_register(ds
,
513 "recordsize", blksz_changed_cb
, zfsvfs
);
514 error
= error
? error
: dsl_prop_register(ds
,
515 "readonly", readonly_changed_cb
, zfsvfs
);
516 error
= error
? error
: dsl_prop_register(ds
,
517 "devices", devices_changed_cb
, zfsvfs
);
518 error
= error
? error
: dsl_prop_register(ds
,
519 "setuid", setuid_changed_cb
, zfsvfs
);
520 error
= error
? error
: dsl_prop_register(ds
,
521 "exec", exec_changed_cb
, zfsvfs
);
522 error
= error
? error
: dsl_prop_register(ds
,
523 "snapdir", snapdir_changed_cb
, zfsvfs
);
524 error
= error
? error
: dsl_prop_register(ds
,
525 "aclmode", acl_mode_changed_cb
, zfsvfs
);
526 error
= error
? error
: dsl_prop_register(ds
,
527 "aclinherit", acl_inherit_changed_cb
, zfsvfs
);
528 error
= error
? error
: dsl_prop_register(ds
,
529 "vscan", vscan_changed_cb
, zfsvfs
);
534 * Invoke our callbacks to restore temporary mount options.
537 readonly_changed_cb(zfsvfs
, readonly
);
539 setuid_changed_cb(zfsvfs
, setuid
);
541 exec_changed_cb(zfsvfs
, exec
);
543 devices_changed_cb(zfsvfs
, devices
);
545 xattr_changed_cb(zfsvfs
, xattr
);
547 atime_changed_cb(zfsvfs
, atime
);
549 nbmand_changed_cb(zfsvfs
, nbmand
);
555 * We may attempt to unregister some callbacks that are not
556 * registered, but this is OK; it will simply return ENOMSG,
557 * which we will ignore.
559 (void) dsl_prop_unregister(ds
, "atime", atime_changed_cb
, zfsvfs
);
560 (void) dsl_prop_unregister(ds
, "xattr", xattr_changed_cb
, zfsvfs
);
561 (void) dsl_prop_unregister(ds
, "recordsize", blksz_changed_cb
, zfsvfs
);
562 (void) dsl_prop_unregister(ds
, "readonly", readonly_changed_cb
, zfsvfs
);
563 (void) dsl_prop_unregister(ds
, "devices", devices_changed_cb
, zfsvfs
);
564 (void) dsl_prop_unregister(ds
, "setuid", setuid_changed_cb
, zfsvfs
);
565 (void) dsl_prop_unregister(ds
, "exec", exec_changed_cb
, zfsvfs
);
566 (void) dsl_prop_unregister(ds
, "snapdir", snapdir_changed_cb
, zfsvfs
);
567 (void) dsl_prop_unregister(ds
, "aclmode", acl_mode_changed_cb
, zfsvfs
);
568 (void) dsl_prop_unregister(ds
, "aclinherit", acl_inherit_changed_cb
,
570 (void) dsl_prop_unregister(ds
, "vscan", vscan_changed_cb
, zfsvfs
);
576 zfs_space_delta_cb(dmu_object_type_t bonustype
, void *data
,
577 uint64_t *userp
, uint64_t *groupp
)
579 znode_phys_t
*znp
= data
;
583 * Is it a valid type of object to track?
585 if (bonustype
!= DMU_OT_ZNODE
&& bonustype
!= DMU_OT_SA
)
589 * If we have a NULL data pointer
590 * then assume the id's aren't changing and
591 * return EEXIST to the dmu to let it know to
597 if (bonustype
== DMU_OT_ZNODE
) {
598 *userp
= znp
->zp_uid
;
599 *groupp
= znp
->zp_gid
;
603 ASSERT(bonustype
== DMU_OT_SA
);
604 hdrsize
= sa_hdrsize(data
);
607 *userp
= *((uint64_t *)((uintptr_t)data
+ hdrsize
+
609 *groupp
= *((uint64_t *)((uintptr_t)data
+ hdrsize
+
613 * This should only happen for newly created
614 * files that haven't had the znode data filled
625 fuidstr_to_sid(zfsvfs_t
*zfsvfs
, const char *fuidstr
,
626 char *domainbuf
, int buflen
, uid_t
*ridp
)
631 fuid
= strtonum(fuidstr
, NULL
);
633 domain
= zfs_fuid_find_by_idx(zfsvfs
, FUID_INDEX(fuid
));
635 (void) strlcpy(domainbuf
, domain
, buflen
);
638 *ridp
= FUID_RID(fuid
);
642 zfs_userquota_prop_to_obj(zfsvfs_t
*zfsvfs
, zfs_userquota_prop_t type
)
645 case ZFS_PROP_USERUSED
:
646 return (DMU_USERUSED_OBJECT
);
647 case ZFS_PROP_GROUPUSED
:
648 return (DMU_GROUPUSED_OBJECT
);
649 case ZFS_PROP_USERQUOTA
:
650 return (zfsvfs
->z_userquota_obj
);
651 case ZFS_PROP_GROUPQUOTA
:
652 return (zfsvfs
->z_groupquota_obj
);
658 zfs_userspace_many(zfsvfs_t
*zfsvfs
, zfs_userquota_prop_t type
,
659 uint64_t *cookiep
, void *vbuf
, uint64_t *bufsizep
)
664 zfs_useracct_t
*buf
= vbuf
;
667 if (!dmu_objset_userspace_present(zfsvfs
->z_os
))
670 obj
= zfs_userquota_prop_to_obj(zfsvfs
, type
);
676 for (zap_cursor_init_serialized(&zc
, zfsvfs
->z_os
, obj
, *cookiep
);
677 (error
= zap_cursor_retrieve(&zc
, &za
)) == 0;
678 zap_cursor_advance(&zc
)) {
679 if ((uintptr_t)buf
- (uintptr_t)vbuf
+ sizeof (zfs_useracct_t
) >
683 fuidstr_to_sid(zfsvfs
, za
.za_name
,
684 buf
->zu_domain
, sizeof (buf
->zu_domain
), &buf
->zu_rid
);
686 buf
->zu_space
= za
.za_first_integer
;
692 ASSERT3U((uintptr_t)buf
- (uintptr_t)vbuf
, <=, *bufsizep
);
693 *bufsizep
= (uintptr_t)buf
- (uintptr_t)vbuf
;
694 *cookiep
= zap_cursor_serialize(&zc
);
695 zap_cursor_fini(&zc
);
700 * buf must be big enough (eg, 32 bytes)
703 id_to_fuidstr(zfsvfs_t
*zfsvfs
, const char *domain
, uid_t rid
,
704 char *buf
, boolean_t addok
)
709 if (domain
&& domain
[0]) {
710 domainid
= zfs_fuid_find_by_domain(zfsvfs
, domain
, NULL
, addok
);
714 fuid
= FUID_ENCODE(domainid
, rid
);
715 (void) sprintf(buf
, "%llx", (longlong_t
)fuid
);
720 zfs_userspace_one(zfsvfs_t
*zfsvfs
, zfs_userquota_prop_t type
,
721 const char *domain
, uint64_t rid
, uint64_t *valp
)
729 if (!dmu_objset_userspace_present(zfsvfs
->z_os
))
732 obj
= zfs_userquota_prop_to_obj(zfsvfs
, type
);
736 err
= id_to_fuidstr(zfsvfs
, domain
, rid
, buf
, B_FALSE
);
740 err
= zap_lookup(zfsvfs
->z_os
, obj
, buf
, 8, 1, valp
);
747 zfs_set_userquota(zfsvfs_t
*zfsvfs
, zfs_userquota_prop_t type
,
748 const char *domain
, uint64_t rid
, uint64_t quota
)
754 boolean_t fuid_dirtied
;
756 if (type
!= ZFS_PROP_USERQUOTA
&& type
!= ZFS_PROP_GROUPQUOTA
)
759 if (zfsvfs
->z_version
< ZPL_VERSION_USERSPACE
)
762 objp
= (type
== ZFS_PROP_USERQUOTA
) ? &zfsvfs
->z_userquota_obj
:
763 &zfsvfs
->z_groupquota_obj
;
765 err
= id_to_fuidstr(zfsvfs
, domain
, rid
, buf
, B_TRUE
);
768 fuid_dirtied
= zfsvfs
->z_fuid_dirty
;
770 tx
= dmu_tx_create(zfsvfs
->z_os
);
771 dmu_tx_hold_zap(tx
, *objp
? *objp
: DMU_NEW_OBJECT
, B_TRUE
, NULL
);
773 dmu_tx_hold_zap(tx
, MASTER_NODE_OBJ
, B_TRUE
,
774 zfs_userquota_prop_prefixes
[type
]);
777 zfs_fuid_txhold(zfsvfs
, tx
);
778 err
= dmu_tx_assign(tx
, TXG_WAIT
);
784 mutex_enter(&zfsvfs
->z_lock
);
786 *objp
= zap_create(zfsvfs
->z_os
, DMU_OT_USERGROUP_QUOTA
,
788 VERIFY(0 == zap_add(zfsvfs
->z_os
, MASTER_NODE_OBJ
,
789 zfs_userquota_prop_prefixes
[type
], 8, 1, objp
, tx
));
791 mutex_exit(&zfsvfs
->z_lock
);
794 err
= zap_remove(zfsvfs
->z_os
, *objp
, buf
, tx
);
798 err
= zap_update(zfsvfs
->z_os
, *objp
, buf
, 8, 1, "a
, tx
);
802 zfs_fuid_sync(zfsvfs
, tx
);
808 zfs_fuid_overquota(zfsvfs_t
*zfsvfs
, boolean_t isgroup
, uint64_t fuid
)
811 uint64_t used
, quota
, usedobj
, quotaobj
;
814 usedobj
= isgroup
? DMU_GROUPUSED_OBJECT
: DMU_USERUSED_OBJECT
;
815 quotaobj
= isgroup
? zfsvfs
->z_groupquota_obj
: zfsvfs
->z_userquota_obj
;
817 if (quotaobj
== 0 || zfsvfs
->z_replay
)
820 (void) sprintf(buf
, "%llx", (longlong_t
)fuid
);
821 err
= zap_lookup(zfsvfs
->z_os
, quotaobj
, buf
, 8, 1, "a
);
825 err
= zap_lookup(zfsvfs
->z_os
, usedobj
, buf
, 8, 1, &used
);
828 return (used
>= quota
);
832 zfs_owner_overquota(zfsvfs_t
*zfsvfs
, znode_t
*zp
, boolean_t isgroup
)
837 quotaobj
= isgroup
? zfsvfs
->z_groupquota_obj
: zfsvfs
->z_userquota_obj
;
839 fuid
= isgroup
? zp
->z_gid
: zp
->z_uid
;
841 if (quotaobj
== 0 || zfsvfs
->z_replay
)
844 return (zfs_fuid_overquota(zfsvfs
, isgroup
, fuid
));
848 zfsvfs_create(const char *osname
, zfsvfs_t
**zfvp
)
856 zfsvfs
= kmem_zalloc(sizeof (zfsvfs_t
), KM_SLEEP
);
859 * We claim to always be readonly so we can open snapshots;
860 * other ZPL code will prevent us from writing to snapshots.
862 error
= dmu_objset_own(osname
, DMU_OST_ZFS
, B_TRUE
, zfsvfs
, &os
);
864 kmem_free(zfsvfs
, sizeof (zfsvfs_t
));
869 * Initialize the zfs-specific filesystem structure.
870 * Should probably make this a kmem cache, shuffle fields,
871 * and just bzero up to z_hold_mtx[].
873 zfsvfs
->z_vfs
= NULL
;
874 zfsvfs
->z_parent
= zfsvfs
;
875 zfsvfs
->z_max_blksz
= SPA_MAXBLOCKSIZE
;
876 zfsvfs
->z_show_ctldir
= ZFS_SNAPDIR_VISIBLE
;
879 error
= zfs_get_zplprop(os
, ZFS_PROP_VERSION
, &zfsvfs
->z_version
);
882 } else if (zfsvfs
->z_version
>
883 zfs_zpl_version_map(spa_version(dmu_objset_spa(os
)))) {
884 (void) printf("Can't mount a version %lld file system "
885 "on a version %lld pool\n. Pool must be upgraded to mount "
886 "this file system.", (u_longlong_t
)zfsvfs
->z_version
,
887 (u_longlong_t
)spa_version(dmu_objset_spa(os
)));
891 if ((error
= zfs_get_zplprop(os
, ZFS_PROP_NORMALIZE
, &zval
)) != 0)
893 zfsvfs
->z_norm
= (int)zval
;
895 if ((error
= zfs_get_zplprop(os
, ZFS_PROP_UTF8ONLY
, &zval
)) != 0)
897 zfsvfs
->z_utf8
= (zval
!= 0);
899 if ((error
= zfs_get_zplprop(os
, ZFS_PROP_CASE
, &zval
)) != 0)
901 zfsvfs
->z_case
= (uint_t
)zval
;
904 * Fold case on file systems that are always or sometimes case
907 if (zfsvfs
->z_case
== ZFS_CASE_INSENSITIVE
||
908 zfsvfs
->z_case
== ZFS_CASE_MIXED
)
909 zfsvfs
->z_norm
|= U8_TEXTPREP_TOUPPER
;
911 zfsvfs
->z_use_fuids
= USE_FUIDS(zfsvfs
->z_version
, zfsvfs
->z_os
);
912 zfsvfs
->z_use_sa
= USE_SA(zfsvfs
->z_version
, zfsvfs
->z_os
);
914 if (zfsvfs
->z_use_sa
) {
915 /* should either have both of these objects or none */
916 error
= zap_lookup(os
, MASTER_NODE_OBJ
, ZFS_SA_ATTRS
, 8, 1,
922 * Pre SA versions file systems should never touch
923 * either the attribute registration or layout objects.
928 error
= sa_setup(os
, sa_obj
, zfs_attr_table
, ZPL_END
,
929 &zfsvfs
->z_attr_table
);
933 if (zfsvfs
->z_version
>= ZPL_VERSION_SA
)
934 sa_register_update_callback(os
, zfs_sa_upgrade
);
936 error
= zap_lookup(os
, MASTER_NODE_OBJ
, ZFS_ROOT_OBJ
, 8, 1,
940 ASSERT(zfsvfs
->z_root
!= 0);
942 error
= zap_lookup(os
, MASTER_NODE_OBJ
, ZFS_UNLINKED_SET
, 8, 1,
943 &zfsvfs
->z_unlinkedobj
);
947 error
= zap_lookup(os
, MASTER_NODE_OBJ
,
948 zfs_userquota_prop_prefixes
[ZFS_PROP_USERQUOTA
],
949 8, 1, &zfsvfs
->z_userquota_obj
);
950 if (error
&& error
!= ENOENT
)
953 error
= zap_lookup(os
, MASTER_NODE_OBJ
,
954 zfs_userquota_prop_prefixes
[ZFS_PROP_GROUPQUOTA
],
955 8, 1, &zfsvfs
->z_groupquota_obj
);
956 if (error
&& error
!= ENOENT
)
959 error
= zap_lookup(os
, MASTER_NODE_OBJ
, ZFS_FUID_TABLES
, 8, 1,
960 &zfsvfs
->z_fuid_obj
);
961 if (error
&& error
!= ENOENT
)
964 error
= zap_lookup(os
, MASTER_NODE_OBJ
, ZFS_SHARES_DIR
, 8, 1,
965 &zfsvfs
->z_shares_dir
);
966 if (error
&& error
!= ENOENT
)
969 mutex_init(&zfsvfs
->z_znodes_lock
, NULL
, MUTEX_DEFAULT
, NULL
);
970 mutex_init(&zfsvfs
->z_lock
, NULL
, MUTEX_DEFAULT
, NULL
);
971 list_create(&zfsvfs
->z_all_znodes
, sizeof (znode_t
),
972 offsetof(znode_t
, z_link_node
));
973 rrw_init(&zfsvfs
->z_teardown_lock
);
974 rw_init(&zfsvfs
->z_teardown_inactive_lock
, NULL
, RW_DEFAULT
, NULL
);
975 rw_init(&zfsvfs
->z_fuid_lock
, NULL
, RW_DEFAULT
, NULL
);
976 for (i
= 0; i
!= ZFS_OBJ_MTX_SZ
; i
++)
977 mutex_init(&zfsvfs
->z_hold_mtx
[i
], NULL
, MUTEX_DEFAULT
, NULL
);
983 dmu_objset_disown(os
, zfsvfs
);
985 kmem_free(zfsvfs
, sizeof (zfsvfs_t
));
990 zfsvfs_setup(zfsvfs_t
*zfsvfs
, boolean_t mounting
)
994 error
= zfs_register_callbacks(zfsvfs
->z_vfs
);
999 * Set the objset user_ptr to track its zfsvfs.
1001 mutex_enter(&zfsvfs
->z_os
->os_user_ptr_lock
);
1002 dmu_objset_set_user(zfsvfs
->z_os
, zfsvfs
);
1003 mutex_exit(&zfsvfs
->z_os
->os_user_ptr_lock
);
1005 zfsvfs
->z_log
= zil_open(zfsvfs
->z_os
, zfs_get_data
);
1008 * If we are not mounting (ie: online recv), then we don't
1009 * have to worry about replaying the log as we blocked all
1010 * operations out since we closed the ZIL.
1016 * During replay we remove the read only flag to
1017 * allow replays to succeed.
1019 readonly
= zfsvfs
->z_vfs
->vfs_flag
& VFS_RDONLY
;
1021 zfsvfs
->z_vfs
->vfs_flag
&= ~VFS_RDONLY
;
1023 zfs_unlinked_drain(zfsvfs
);
1026 * Parse and replay the intent log.
1028 * Because of ziltest, this must be done after
1029 * zfs_unlinked_drain(). (Further note: ziltest
1030 * doesn't use readonly mounts, where
1031 * zfs_unlinked_drain() isn't called.) This is because
1032 * ziltest causes spa_sync() to think it's committed,
1033 * but actually it is not, so the intent log contains
1034 * many txg's worth of changes.
1036 * In particular, if object N is in the unlinked set in
1037 * the last txg to actually sync, then it could be
1038 * actually freed in a later txg and then reallocated
1039 * in a yet later txg. This would write a "create
1040 * object N" record to the intent log. Normally, this
1041 * would be fine because the spa_sync() would have
1042 * written out the fact that object N is free, before
1043 * we could write the "create object N" intent log
1046 * But when we are in ziltest mode, we advance the "open
1047 * txg" without actually spa_sync()-ing the changes to
1048 * disk. So we would see that object N is still
1049 * allocated and in the unlinked set, and there is an
1050 * intent log record saying to allocate it.
1052 if (spa_writeable(dmu_objset_spa(zfsvfs
->z_os
))) {
1053 if (zil_replay_disable
) {
1054 zil_destroy(zfsvfs
->z_log
, B_FALSE
);
1056 zfsvfs
->z_replay
= B_TRUE
;
1057 zil_replay(zfsvfs
->z_os
, zfsvfs
,
1059 zfsvfs
->z_replay
= B_FALSE
;
1062 zfsvfs
->z_vfs
->vfs_flag
|= readonly
; /* restore readonly bit */
1069 zfsvfs_free(zfsvfs_t
*zfsvfs
)
1072 extern krwlock_t zfsvfs_lock
; /* in zfs_znode.c */
1075 * This is a barrier to prevent the filesystem from going away in
1076 * zfs_znode_move() until we can safely ensure that the filesystem is
1077 * not unmounted. We consider the filesystem valid before the barrier
1078 * and invalid after the barrier.
1080 rw_enter(&zfsvfs_lock
, RW_READER
);
1081 rw_exit(&zfsvfs_lock
);
1083 zfs_fuid_destroy(zfsvfs
);
1085 mutex_destroy(&zfsvfs
->z_znodes_lock
);
1086 mutex_destroy(&zfsvfs
->z_lock
);
1087 list_destroy(&zfsvfs
->z_all_znodes
);
1088 rrw_destroy(&zfsvfs
->z_teardown_lock
);
1089 rw_destroy(&zfsvfs
->z_teardown_inactive_lock
);
1090 rw_destroy(&zfsvfs
->z_fuid_lock
);
1091 for (i
= 0; i
!= ZFS_OBJ_MTX_SZ
; i
++)
1092 mutex_destroy(&zfsvfs
->z_hold_mtx
[i
]);
1093 kmem_free(zfsvfs
, sizeof (zfsvfs_t
));
1097 zfs_set_fuid_feature(zfsvfs_t
*zfsvfs
)
1099 zfsvfs
->z_use_fuids
= USE_FUIDS(zfsvfs
->z_version
, zfsvfs
->z_os
);
1100 if (zfsvfs
->z_vfs
) {
1101 if (zfsvfs
->z_use_fuids
) {
1102 vfs_set_feature(zfsvfs
->z_vfs
, VFSFT_XVATTR
);
1103 vfs_set_feature(zfsvfs
->z_vfs
, VFSFT_SYSATTR_VIEWS
);
1104 vfs_set_feature(zfsvfs
->z_vfs
, VFSFT_ACEMASKONACCESS
);
1105 vfs_set_feature(zfsvfs
->z_vfs
, VFSFT_ACLONCREATE
);
1106 vfs_set_feature(zfsvfs
->z_vfs
, VFSFT_ACCESS_FILTER
);
1107 vfs_set_feature(zfsvfs
->z_vfs
, VFSFT_REPARSE
);
1109 vfs_clear_feature(zfsvfs
->z_vfs
, VFSFT_XVATTR
);
1110 vfs_clear_feature(zfsvfs
->z_vfs
, VFSFT_SYSATTR_VIEWS
);
1111 vfs_clear_feature(zfsvfs
->z_vfs
, VFSFT_ACEMASKONACCESS
);
1112 vfs_clear_feature(zfsvfs
->z_vfs
, VFSFT_ACLONCREATE
);
1113 vfs_clear_feature(zfsvfs
->z_vfs
, VFSFT_ACCESS_FILTER
);
1114 vfs_clear_feature(zfsvfs
->z_vfs
, VFSFT_REPARSE
);
1117 zfsvfs
->z_use_sa
= USE_SA(zfsvfs
->z_version
, zfsvfs
->z_os
);
1121 zfs_domount(vfs_t
*vfsp
, char *osname
)
1124 uint64_t recordsize
, fsid_guid
;
1131 error
= zfsvfs_create(osname
, &zfsvfs
);
1134 zfsvfs
->z_vfs
= vfsp
;
1136 /* Initialize the generic filesystem structure. */
1137 vfsp
->vfs_bcount
= 0;
1138 vfsp
->vfs_data
= NULL
;
1140 if (zfs_create_unique_device(&mount_dev
) == -1) {
1144 ASSERT(vfs_devismounted(mount_dev
) == 0);
1146 if (error
= dsl_prop_get_integer(osname
, "recordsize", &recordsize
,
1150 vfsp
->vfs_dev
= mount_dev
;
1151 vfsp
->vfs_fstype
= zfsfstype
;
1152 vfsp
->vfs_bsize
= recordsize
;
1153 vfsp
->vfs_flag
|= VFS_NOTRUNC
;
1154 vfsp
->vfs_data
= zfsvfs
;
1157 * The fsid is 64 bits, composed of an 8-bit fs type, which
1158 * separates our fsid from any other filesystem types, and a
1159 * 56-bit objset unique ID. The objset unique ID is unique to
1160 * all objsets open on this system, provided by unique_create().
1161 * The 8-bit fs type must be put in the low bits of fsid[1]
1162 * because that's where other Solaris filesystems put it.
1164 fsid_guid
= dmu_objset_fsid_guid(zfsvfs
->z_os
);
1165 ASSERT((fsid_guid
& ~((1ULL<<56)-1)) == 0);
1166 vfsp
->vfs_fsid
.val
[0] = fsid_guid
;
1167 vfsp
->vfs_fsid
.val
[1] = ((fsid_guid
>>32) << 8) |
1171 * Set features for file system.
1173 zfs_set_fuid_feature(zfsvfs
);
1174 if (zfsvfs
->z_case
== ZFS_CASE_INSENSITIVE
) {
1175 vfs_set_feature(vfsp
, VFSFT_DIRENTFLAGS
);
1176 vfs_set_feature(vfsp
, VFSFT_CASEINSENSITIVE
);
1177 vfs_set_feature(vfsp
, VFSFT_NOCASESENSITIVE
);
1178 } else if (zfsvfs
->z_case
== ZFS_CASE_MIXED
) {
1179 vfs_set_feature(vfsp
, VFSFT_DIRENTFLAGS
);
1180 vfs_set_feature(vfsp
, VFSFT_CASEINSENSITIVE
);
1182 vfs_set_feature(vfsp
, VFSFT_ZEROCOPY_SUPPORTED
);
1184 if (dmu_objset_is_snapshot(zfsvfs
->z_os
)) {
1187 atime_changed_cb(zfsvfs
, B_FALSE
);
1188 readonly_changed_cb(zfsvfs
, B_TRUE
);
1189 if (error
= dsl_prop_get_integer(osname
, "xattr", &pval
, NULL
))
1191 xattr_changed_cb(zfsvfs
, pval
);
1192 zfsvfs
->z_issnap
= B_TRUE
;
1193 zfsvfs
->z_os
->os_sync
= ZFS_SYNC_DISABLED
;
1195 mutex_enter(&zfsvfs
->z_os
->os_user_ptr_lock
);
1196 dmu_objset_set_user(zfsvfs
->z_os
, zfsvfs
);
1197 mutex_exit(&zfsvfs
->z_os
->os_user_ptr_lock
);
1199 error
= zfsvfs_setup(zfsvfs
, B_TRUE
);
1202 if (!zfsvfs
->z_issnap
)
1203 zfsctl_create(zfsvfs
);
1206 dmu_objset_disown(zfsvfs
->z_os
, zfsvfs
);
1207 zfsvfs_free(zfsvfs
);
1209 atomic_add_32(&zfs_active_fs_count
, 1);
1216 zfs_unregister_callbacks(zfsvfs_t
*zfsvfs
)
1218 objset_t
*os
= zfsvfs
->z_os
;
1219 struct dsl_dataset
*ds
;
1222 * Unregister properties.
1224 if (!dmu_objset_is_snapshot(os
)) {
1225 ds
= dmu_objset_ds(os
);
1226 VERIFY(dsl_prop_unregister(ds
, "atime", atime_changed_cb
,
1229 VERIFY(dsl_prop_unregister(ds
, "xattr", xattr_changed_cb
,
1232 VERIFY(dsl_prop_unregister(ds
, "recordsize", blksz_changed_cb
,
1235 VERIFY(dsl_prop_unregister(ds
, "readonly", readonly_changed_cb
,
1238 VERIFY(dsl_prop_unregister(ds
, "devices", devices_changed_cb
,
1241 VERIFY(dsl_prop_unregister(ds
, "setuid", setuid_changed_cb
,
1244 VERIFY(dsl_prop_unregister(ds
, "exec", exec_changed_cb
,
1247 VERIFY(dsl_prop_unregister(ds
, "snapdir", snapdir_changed_cb
,
1250 VERIFY(dsl_prop_unregister(ds
, "aclmode", acl_mode_changed_cb
,
1253 VERIFY(dsl_prop_unregister(ds
, "aclinherit",
1254 acl_inherit_changed_cb
, zfsvfs
) == 0);
1256 VERIFY(dsl_prop_unregister(ds
, "vscan",
1257 vscan_changed_cb
, zfsvfs
) == 0);
1262 * Convert a decimal digit string to a uint64_t integer.
1265 str_to_uint64(char *str
, uint64_t *objnum
)
1270 if (*str
< '0' || *str
> '9')
1273 num
= num
*10 + *str
++ - '0';
1281 * The boot path passed from the boot loader is in the form of
1282 * "rootpool-name/root-filesystem-object-number'. Convert this
1283 * string to a dataset name: "rootpool-name/root-filesystem-name".
1286 zfs_parse_bootfs(char *bpath
, char *outpath
)
1292 if (*bpath
== 0 || *bpath
== '/')
1295 (void) strcpy(outpath
, bpath
);
1297 slashp
= strchr(bpath
, '/');
1299 /* if no '/', just return the pool name */
1300 if (slashp
== NULL
) {
1304 /* if not a number, just return the root dataset name */
1305 if (str_to_uint64(slashp
+1, &objnum
)) {
1310 error
= dsl_dsobj_to_dsname(bpath
, objnum
, outpath
);
1317 * zfs_check_global_label:
1318 * Check that the hex label string is appropriate for the dataset
1319 * being mounted into the global_zone proper.
1321 * Return an error if the hex label string is not default or
1322 * admin_low/admin_high. For admin_low labels, the corresponding
1323 * dataset must be readonly.
1326 zfs_check_global_label(const char *dsname
, const char *hexsl
)
1328 if (strcasecmp(hexsl
, ZFS_MLSLABEL_DEFAULT
) == 0)
1330 if (strcasecmp(hexsl
, ADMIN_HIGH
) == 0)
1332 if (strcasecmp(hexsl
, ADMIN_LOW
) == 0) {
1333 /* must be readonly */
1336 if (dsl_prop_get_integer(dsname
,
1337 zfs_prop_to_name(ZFS_PROP_READONLY
), &rdonly
, NULL
))
1339 return (rdonly
? 0 : EACCES
);
1345 * zfs_mount_label_policy:
1346 * Determine whether the mount is allowed according to MAC check.
1347 * by comparing (where appropriate) label of the dataset against
1348 * the label of the zone being mounted into. If the dataset has
1349 * no label, create one.
1352 * 0 : access allowed
1353 * >0 : error code, such as EACCES
1356 zfs_mount_label_policy(vfs_t
*vfsp
, char *osname
)
1359 zone_t
*mntzone
= NULL
;
1360 ts_label_t
*mnt_tsl
;
1363 char ds_hexsl
[MAXNAMELEN
];
1365 retv
= EACCES
; /* assume the worst */
1368 * Start by getting the dataset label if it exists.
1370 error
= dsl_prop_get(osname
, zfs_prop_to_name(ZFS_PROP_MLSLABEL
),
1371 1, sizeof (ds_hexsl
), &ds_hexsl
, NULL
);
1376 * If labeling is NOT enabled, then disallow the mount of datasets
1377 * which have a non-default label already. No other label checks
1380 if (!is_system_labeled()) {
1381 if (strcasecmp(ds_hexsl
, ZFS_MLSLABEL_DEFAULT
) == 0)
1387 * Get the label of the mountpoint. If mounting into the global
1388 * zone (i.e. mountpoint is not within an active zone and the
1389 * zoned property is off), the label must be default or
1390 * admin_low/admin_high only; no other checks are needed.
1392 mntzone
= zone_find_by_any_path(refstr_value(vfsp
->vfs_mntpt
), B_FALSE
);
1393 if (mntzone
->zone_id
== GLOBAL_ZONEID
) {
1398 if (dsl_prop_get_integer(osname
,
1399 zfs_prop_to_name(ZFS_PROP_ZONED
), &zoned
, NULL
))
1402 return (zfs_check_global_label(osname
, ds_hexsl
));
1405 * This is the case of a zone dataset being mounted
1406 * initially, before the zone has been fully created;
1407 * allow this mount into global zone.
1412 mnt_tsl
= mntzone
->zone_slabel
;
1413 ASSERT(mnt_tsl
!= NULL
);
1414 label_hold(mnt_tsl
);
1415 mnt_sl
= label2bslabel(mnt_tsl
);
1417 if (strcasecmp(ds_hexsl
, ZFS_MLSLABEL_DEFAULT
) == 0) {
1419 * The dataset doesn't have a real label, so fabricate one.
1423 if (l_to_str_internal(mnt_sl
, &str
) == 0 &&
1424 dsl_prop_set(osname
, zfs_prop_to_name(ZFS_PROP_MLSLABEL
),
1425 ZPROP_SRC_LOCAL
, 1, strlen(str
) + 1, str
) == 0)
1428 kmem_free(str
, strlen(str
) + 1);
1429 } else if (hexstr_to_label(ds_hexsl
, &ds_sl
) == 0) {
1431 * Now compare labels to complete the MAC check. If the
1432 * labels are equal then allow access. If the mountpoint
1433 * label dominates the dataset label, allow readonly access.
1434 * Otherwise, access is denied.
1436 if (blequal(mnt_sl
, &ds_sl
))
1438 else if (bldominates(mnt_sl
, &ds_sl
)) {
1439 vfs_setmntopt(vfsp
, MNTOPT_RO
, NULL
, 0);
1444 label_rele(mnt_tsl
);
1450 zfs_mountroot(vfs_t
*vfsp
, enum whymountroot why
)
1453 static int zfsrootdone
= 0;
1454 zfsvfs_t
*zfsvfs
= NULL
;
1463 * The filesystem that we mount as root is defined in the
1464 * boot property "zfs-bootfs" with a format of
1465 * "poolname/root-dataset-objnum".
1467 if (why
== ROOT_INIT
) {
1471 * the process of doing a spa_load will require the
1472 * clock to be set before we could (for example) do
1473 * something better by looking at the timestamp on
1474 * an uberblock, so just set it to -1.
1478 if ((zfs_bootfs
= spa_get_bootprop("zfs-bootfs")) == NULL
) {
1479 cmn_err(CE_NOTE
, "spa_get_bootfs: can not get "
1483 zfs_devid
= spa_get_bootprop("diskdevid");
1484 error
= spa_import_rootpool(rootfs
.bo_name
, zfs_devid
);
1486 spa_free_bootprop(zfs_devid
);
1488 spa_free_bootprop(zfs_bootfs
);
1489 cmn_err(CE_NOTE
, "spa_import_rootpool: error %d",
1493 if (error
= zfs_parse_bootfs(zfs_bootfs
, rootfs
.bo_name
)) {
1494 spa_free_bootprop(zfs_bootfs
);
1495 cmn_err(CE_NOTE
, "zfs_parse_bootfs: error %d",
1500 spa_free_bootprop(zfs_bootfs
);
1502 if (error
= vfs_lock(vfsp
))
1505 if (error
= zfs_domount(vfsp
, rootfs
.bo_name
)) {
1506 cmn_err(CE_NOTE
, "zfs_domount: error %d", error
);
1510 zfsvfs
= (zfsvfs_t
*)vfsp
->vfs_data
;
1512 if (error
= zfs_zget(zfsvfs
, zfsvfs
->z_root
, &zp
)) {
1513 cmn_err(CE_NOTE
, "zfs_zget: error %d", error
);
1518 mutex_enter(&vp
->v_lock
);
1519 vp
->v_flag
|= VROOT
;
1520 mutex_exit(&vp
->v_lock
);
1524 * Leave rootvp held. The root file system is never unmounted.
1527 vfs_add((struct vnode
*)0, vfsp
,
1528 (vfsp
->vfs_flag
& VFS_RDONLY
) ? MS_RDONLY
: 0);
1532 } else if (why
== ROOT_REMOUNT
) {
1533 readonly_changed_cb(vfsp
->vfs_data
, B_FALSE
);
1534 vfsp
->vfs_flag
|= VFS_REMOUNT
;
1536 /* refresh mount options */
1537 zfs_unregister_callbacks(vfsp
->vfs_data
);
1538 return (zfs_register_callbacks(vfsp
));
1540 } else if (why
== ROOT_UNMOUNT
) {
1541 zfs_unregister_callbacks((zfsvfs_t
*)vfsp
->vfs_data
);
1542 (void) zfs_sync(vfsp
, 0, 0);
1547 * if "why" is equal to anything else other than ROOT_INIT,
1548 * ROOT_REMOUNT, or ROOT_UNMOUNT, we do not support it.
1555 zfs_mount(vfs_t
*vfsp
, vnode_t
*mvp
, struct mounta
*uap
, cred_t
*cr
)
1560 uio_seg_t fromspace
= (uap
->flags
& MS_SYSSPACE
) ?
1561 UIO_SYSSPACE
: UIO_USERSPACE
;
1564 if (mvp
->v_type
!= VDIR
)
1567 mutex_enter(&mvp
->v_lock
);
1568 if ((uap
->flags
& MS_REMOUNT
) == 0 &&
1569 (uap
->flags
& MS_OVERLAY
) == 0 &&
1570 (mvp
->v_count
!= 1 || (mvp
->v_flag
& VROOT
))) {
1571 mutex_exit(&mvp
->v_lock
);
1574 mutex_exit(&mvp
->v_lock
);
1577 * ZFS does not support passing unparsed data in via MS_DATA.
1578 * Users should use the MS_OPTIONSTR interface; this means
1579 * that all option parsing is already done and the options struct
1580 * can be interrogated.
1582 if ((uap
->flags
& MS_DATA
) && uap
->datalen
> 0)
1586 * Get the objset name (the "special" mount argument).
1588 if (error
= pn_get(uap
->spec
, fromspace
, &spn
))
1591 osname
= spn
.pn_path
;
1594 * Check for mount privilege?
1596 * If we don't have privilege then see if
1597 * we have local permission to allow it
1599 error
= secpolicy_fs_mount(cr
, mvp
, vfsp
);
1601 if (dsl_deleg_access(osname
, ZFS_DELEG_PERM_MOUNT
, cr
) == 0) {
1605 * Make sure user is the owner of the mount point
1606 * or has sufficient privileges.
1609 vattr
.va_mask
= AT_UID
;
1611 if (VOP_GETATTR(mvp
, &vattr
, 0, cr
, NULL
)) {
1615 if (secpolicy_vnode_owner(cr
, vattr
.va_uid
) != 0 &&
1616 VOP_ACCESS(mvp
, VWRITE
, 0, cr
, NULL
) != 0) {
1619 secpolicy_fs_mount_clearopts(cr
, vfsp
);
1626 * Refuse to mount a filesystem if we are in a local zone and the
1627 * dataset is not visible.
1629 if (!INGLOBALZONE(curproc
) &&
1630 (!zone_dataset_visible(osname
, &canwrite
) || !canwrite
)) {
1635 error
= zfs_mount_label_policy(vfsp
, osname
);
1640 * When doing a remount, we simply refresh our temporary properties
1641 * according to those options set in the current VFS options.
1643 if (uap
->flags
& MS_REMOUNT
) {
1644 /* refresh mount options */
1645 zfs_unregister_callbacks(vfsp
->vfs_data
);
1646 error
= zfs_register_callbacks(vfsp
);
1650 error
= zfs_domount(vfsp
, osname
);
1653 * Add an extra VFS_HOLD on our parent vfs so that it can't
1654 * disappear due to a forced unmount.
1656 if (error
== 0 && ((zfsvfs_t
*)vfsp
->vfs_data
)->z_issnap
)
1657 VFS_HOLD(mvp
->v_vfsp
);
1665 zfs_statvfs(vfs_t
*vfsp
, struct statvfs64
*statp
)
1667 zfsvfs_t
*zfsvfs
= vfsp
->vfs_data
;
1669 uint64_t refdbytes
, availbytes
, usedobjs
, availobjs
;
1673 dmu_objset_space(zfsvfs
->z_os
,
1674 &refdbytes
, &availbytes
, &usedobjs
, &availobjs
);
1677 * The underlying storage pool actually uses multiple block sizes.
1678 * We report the fragsize as the smallest block size we support,
1679 * and we report our blocksize as the filesystem's maximum blocksize.
1681 statp
->f_frsize
= 1UL << SPA_MINBLOCKSHIFT
;
1682 statp
->f_bsize
= zfsvfs
->z_max_blksz
;
1685 * The following report "total" blocks of various kinds in the
1686 * file system, but reported in terms of f_frsize - the
1690 statp
->f_blocks
= (refdbytes
+ availbytes
) >> SPA_MINBLOCKSHIFT
;
1691 statp
->f_bfree
= availbytes
>> SPA_MINBLOCKSHIFT
;
1692 statp
->f_bavail
= statp
->f_bfree
; /* no root reservation */
1695 * statvfs() should really be called statufs(), because it assumes
1696 * static metadata. ZFS doesn't preallocate files, so the best
1697 * we can do is report the max that could possibly fit in f_files,
1698 * and that minus the number actually used in f_ffree.
1699 * For f_ffree, report the smaller of the number of object available
1700 * and the number of blocks (each object will take at least a block).
1702 statp
->f_ffree
= MIN(availobjs
, statp
->f_bfree
);
1703 statp
->f_favail
= statp
->f_ffree
; /* no "root reservation" */
1704 statp
->f_files
= statp
->f_ffree
+ usedobjs
;
1706 (void) cmpldev(&d32
, vfsp
->vfs_dev
);
1707 statp
->f_fsid
= d32
;
1710 * We're a zfs filesystem.
1712 (void) strcpy(statp
->f_basetype
, vfssw
[vfsp
->vfs_fstype
].vsw_name
);
1714 statp
->f_flag
= vf_to_stf(vfsp
->vfs_flag
);
1716 statp
->f_namemax
= ZFS_MAXNAMELEN
;
1719 * We have all of 32 characters to stuff a string here.
1720 * Is there anything useful we could/should provide?
1722 bzero(statp
->f_fstr
, sizeof (statp
->f_fstr
));
1729 zfs_root(vfs_t
*vfsp
, vnode_t
**vpp
)
1731 zfsvfs_t
*zfsvfs
= vfsp
->vfs_data
;
1737 error
= zfs_zget(zfsvfs
, zfsvfs
->z_root
, &rootzp
);
1739 *vpp
= ZTOV(rootzp
);
1746 * Teardown the zfsvfs::z_os.
1748 * Note, if 'unmounting' if FALSE, we return with the 'z_teardown_lock'
1749 * and 'z_teardown_inactive_lock' held.
1752 zfsvfs_teardown(zfsvfs_t
*zfsvfs
, boolean_t unmounting
)
1756 rrw_enter(&zfsvfs
->z_teardown_lock
, RW_WRITER
, FTAG
);
1760 * We purge the parent filesystem's vfsp as the parent
1761 * filesystem and all of its snapshots have their vnode's
1762 * v_vfsp set to the parent's filesystem's vfsp. Note,
1763 * 'z_parent' is self referential for non-snapshots.
1765 (void) dnlc_purge_vfsp(zfsvfs
->z_parent
->z_vfs
, 0);
1769 * Close the zil. NB: Can't close the zil while zfs_inactive
1770 * threads are blocked as zil_close can call zfs_inactive.
1772 if (zfsvfs
->z_log
) {
1773 zil_close(zfsvfs
->z_log
);
1774 zfsvfs
->z_log
= NULL
;
1777 rw_enter(&zfsvfs
->z_teardown_inactive_lock
, RW_WRITER
);
1780 * If we are not unmounting (ie: online recv) and someone already
1781 * unmounted this file system while we were doing the switcheroo,
1782 * or a reopen of z_os failed then just bail out now.
1784 if (!unmounting
&& (zfsvfs
->z_unmounted
|| zfsvfs
->z_os
== NULL
)) {
1785 rw_exit(&zfsvfs
->z_teardown_inactive_lock
);
1786 rrw_exit(&zfsvfs
->z_teardown_lock
, FTAG
);
1791 * At this point there are no vops active, and any new vops will
1792 * fail with EIO since we have z_teardown_lock for writer (only
1793 * relavent for forced unmount).
1795 * Release all holds on dbufs.
1797 mutex_enter(&zfsvfs
->z_znodes_lock
);
1798 for (zp
= list_head(&zfsvfs
->z_all_znodes
); zp
!= NULL
;
1799 zp
= list_next(&zfsvfs
->z_all_znodes
, zp
))
1801 ASSERT(ZTOV(zp
)->v_count
> 0);
1802 zfs_znode_dmu_fini(zp
);
1804 mutex_exit(&zfsvfs
->z_znodes_lock
);
1807 * If we are unmounting, set the unmounted flag and let new vops
1808 * unblock. zfs_inactive will have the unmounted behavior, and all
1809 * other vops will fail with EIO.
1812 zfsvfs
->z_unmounted
= B_TRUE
;
1813 rrw_exit(&zfsvfs
->z_teardown_lock
, FTAG
);
1814 rw_exit(&zfsvfs
->z_teardown_inactive_lock
);
1818 * z_os will be NULL if there was an error in attempting to reopen
1819 * zfsvfs, so just return as the properties had already been
1820 * unregistered and cached data had been evicted before.
1822 if (zfsvfs
->z_os
== NULL
)
1826 * Unregister properties.
1828 zfs_unregister_callbacks(zfsvfs
);
1833 if (dmu_objset_is_dirty_anywhere(zfsvfs
->z_os
))
1834 if (!(zfsvfs
->z_vfs
->vfs_flag
& VFS_RDONLY
))
1835 txg_wait_synced(dmu_objset_pool(zfsvfs
->z_os
), 0);
1836 (void) dmu_objset_evict_dbufs(zfsvfs
->z_os
);
1843 zfs_umount(vfs_t
*vfsp
, int fflag
, cred_t
*cr
)
1845 zfsvfs_t
*zfsvfs
= vfsp
->vfs_data
;
1849 ret
= secpolicy_fs_unmount(cr
, vfsp
);
1851 if (dsl_deleg_access((char *)refstr_value(vfsp
->vfs_resource
),
1852 ZFS_DELEG_PERM_MOUNT
, cr
))
1857 * We purge the parent filesystem's vfsp as the parent filesystem
1858 * and all of its snapshots have their vnode's v_vfsp set to the
1859 * parent's filesystem's vfsp. Note, 'z_parent' is self
1860 * referential for non-snapshots.
1862 (void) dnlc_purge_vfsp(zfsvfs
->z_parent
->z_vfs
, 0);
1865 * Unmount any snapshots mounted under .zfs before unmounting the
1868 if (zfsvfs
->z_ctldir
!= NULL
&&
1869 (ret
= zfsctl_umount_snapshots(vfsp
, fflag
, cr
)) != 0) {
1873 if (!(fflag
& MS_FORCE
)) {
1875 * Check the number of active vnodes in the file system.
1876 * Our count is maintained in the vfs structure, but the
1877 * number is off by 1 to indicate a hold on the vfs
1880 * The '.zfs' directory maintains a reference of its
1881 * own, and any active references underneath are
1882 * reflected in the vnode count.
1884 if (zfsvfs
->z_ctldir
== NULL
) {
1885 if (vfsp
->vfs_count
> 1)
1888 if (vfsp
->vfs_count
> 2 ||
1889 zfsvfs
->z_ctldir
->v_count
> 1)
1894 vfsp
->vfs_flag
|= VFS_UNMOUNTED
;
1896 VERIFY(zfsvfs_teardown(zfsvfs
, B_TRUE
) == 0);
1900 * z_os will be NULL if there was an error in
1901 * attempting to reopen zfsvfs.
1905 * Unset the objset user_ptr.
1907 mutex_enter(&os
->os_user_ptr_lock
);
1908 dmu_objset_set_user(os
, NULL
);
1909 mutex_exit(&os
->os_user_ptr_lock
);
1912 * Finally release the objset
1914 dmu_objset_disown(os
, zfsvfs
);
1918 * We can now safely destroy the '.zfs' directory node.
1920 if (zfsvfs
->z_ctldir
!= NULL
)
1921 zfsctl_destroy(zfsvfs
);
1927 zfs_vget(vfs_t
*vfsp
, vnode_t
**vpp
, fid_t
*fidp
)
1929 zfsvfs_t
*zfsvfs
= vfsp
->vfs_data
;
1931 uint64_t object
= 0;
1932 uint64_t fid_gen
= 0;
1941 if (fidp
->fid_len
== LONG_FID_LEN
) {
1942 zfid_long_t
*zlfid
= (zfid_long_t
*)fidp
;
1943 uint64_t objsetid
= 0;
1944 uint64_t setgen
= 0;
1946 for (i
= 0; i
< sizeof (zlfid
->zf_setid
); i
++)
1947 objsetid
|= ((uint64_t)zlfid
->zf_setid
[i
]) << (8 * i
);
1949 for (i
= 0; i
< sizeof (zlfid
->zf_setgen
); i
++)
1950 setgen
|= ((uint64_t)zlfid
->zf_setgen
[i
]) << (8 * i
);
1954 err
= zfsctl_lookup_objset(vfsp
, objsetid
, &zfsvfs
);
1960 if (fidp
->fid_len
== SHORT_FID_LEN
|| fidp
->fid_len
== LONG_FID_LEN
) {
1961 zfid_short_t
*zfid
= (zfid_short_t
*)fidp
;
1963 for (i
= 0; i
< sizeof (zfid
->zf_object
); i
++)
1964 object
|= ((uint64_t)zfid
->zf_object
[i
]) << (8 * i
);
1966 for (i
= 0; i
< sizeof (zfid
->zf_gen
); i
++)
1967 fid_gen
|= ((uint64_t)zfid
->zf_gen
[i
]) << (8 * i
);
1973 /* A zero fid_gen means we are in the .zfs control directories */
1975 (object
== ZFSCTL_INO_ROOT
|| object
== ZFSCTL_INO_SNAPDIR
)) {
1976 *vpp
= zfsvfs
->z_ctldir
;
1977 ASSERT(*vpp
!= NULL
);
1978 if (object
== ZFSCTL_INO_SNAPDIR
) {
1979 VERIFY(zfsctl_root_lookup(*vpp
, "snapshot", vpp
, NULL
,
1980 0, NULL
, NULL
, NULL
, NULL
, NULL
) == 0);
1988 gen_mask
= -1ULL >> (64 - 8 * i
);
1990 dprintf("getting %llu [%u mask %llx]\n", object
, fid_gen
, gen_mask
);
1991 if (err
= zfs_zget(zfsvfs
, object
, &zp
)) {
1995 (void) sa_lookup(zp
->z_sa_hdl
, SA_ZPL_GEN(zfsvfs
), &zp_gen
,
1997 zp_gen
= zp_gen
& gen_mask
;
2000 if (zp
->z_unlinked
|| zp_gen
!= fid_gen
) {
2001 dprintf("znode gen (%u) != fid gen (%u)\n", zp_gen
, fid_gen
);
2013 * Block out VOPs and close zfsvfs_t::z_os
2015 * Note, if successful, then we return with the 'z_teardown_lock' and
2016 * 'z_teardown_inactive_lock' write held.
2019 zfs_suspend_fs(zfsvfs_t
*zfsvfs
)
2023 if ((error
= zfsvfs_teardown(zfsvfs
, B_FALSE
)) != 0)
2025 dmu_objset_disown(zfsvfs
->z_os
, zfsvfs
);
2031 * Reopen zfsvfs_t::z_os and release VOPs.
2034 zfs_resume_fs(zfsvfs_t
*zfsvfs
, const char *osname
)
2038 ASSERT(RRW_WRITE_HELD(&zfsvfs
->z_teardown_lock
));
2039 ASSERT(RW_WRITE_HELD(&zfsvfs
->z_teardown_inactive_lock
));
2041 err
= dmu_objset_own(osname
, DMU_OST_ZFS
, B_FALSE
, zfsvfs
,
2044 zfsvfs
->z_os
= NULL
;
2047 uint64_t sa_obj
= 0;
2050 * Make sure version hasn't changed
2053 err
= zfs_get_zplprop(zfsvfs
->z_os
, ZFS_PROP_VERSION
,
2054 &zfsvfs
->z_version
);
2059 err
= zap_lookup(zfsvfs
->z_os
, MASTER_NODE_OBJ
,
2060 ZFS_SA_ATTRS
, 8, 1, &sa_obj
);
2062 if (err
&& zfsvfs
->z_version
>= ZPL_VERSION_SA
)
2065 if ((err
= sa_setup(zfsvfs
->z_os
, sa_obj
,
2066 zfs_attr_table
, ZPL_END
, &zfsvfs
->z_attr_table
)) != 0)
2069 if (zfsvfs
->z_version
>= ZPL_VERSION_SA
)
2070 sa_register_update_callback(zfsvfs
->z_os
,
2073 VERIFY(zfsvfs_setup(zfsvfs
, B_FALSE
) == 0);
2075 zfs_set_fuid_feature(zfsvfs
);
2078 * Attempt to re-establish all the active znodes with
2079 * their dbufs. If a zfs_rezget() fails, then we'll let
2080 * any potential callers discover that via ZFS_ENTER_VERIFY_VP
2081 * when they try to use their znode.
2083 mutex_enter(&zfsvfs
->z_znodes_lock
);
2084 for (zp
= list_head(&zfsvfs
->z_all_znodes
); zp
;
2085 zp
= list_next(&zfsvfs
->z_all_znodes
, zp
)) {
2086 (void) zfs_rezget(zp
);
2088 mutex_exit(&zfsvfs
->z_znodes_lock
);
2092 /* release the VOPs */
2093 rw_exit(&zfsvfs
->z_teardown_inactive_lock
);
2094 rrw_exit(&zfsvfs
->z_teardown_lock
, FTAG
);
2098 * Since we couldn't reopen zfsvfs::z_os, or
2099 * setup the sa framework force unmount this file system.
2101 if (vn_vfswlock(zfsvfs
->z_vfs
->vfs_vnodecovered
) == 0)
2102 (void) dounmount(zfsvfs
->z_vfs
, MS_FORCE
, CRED());
2108 zfs_freevfs(vfs_t
*vfsp
)
2110 zfsvfs_t
*zfsvfs
= vfsp
->vfs_data
;
2113 * If this is a snapshot, we have an extra VFS_HOLD on our parent
2114 * from zfs_mount(). Release it here. If we came through
2115 * zfs_mountroot() instead, we didn't grab an extra hold, so
2116 * skip the VFS_RELE for rootvfs.
2118 if (zfsvfs
->z_issnap
&& (vfsp
!= rootvfs
))
2119 VFS_RELE(zfsvfs
->z_parent
->z_vfs
);
2121 zfsvfs_free(zfsvfs
);
2123 atomic_add_32(&zfs_active_fs_count
, -1);
2127 * VFS_INIT() initialization. Note that there is no VFS_FINI(),
2128 * so we can't safely do any non-idempotent initialization here.
2129 * Leave that to zfs_init() and zfs_fini(), which are called
2130 * from the module's _init() and _fini() entry points.
2134 zfs_vfsinit(int fstype
, char *name
)
2141 * Setup vfsops and vnodeops tables.
2143 error
= vfs_setfsops(fstype
, zfs_vfsops_template
, &zfs_vfsops
);
2145 cmn_err(CE_WARN
, "zfs: bad vfs ops template");
2148 error
= zfs_create_op_tables();
2150 zfs_remove_op_tables();
2151 cmn_err(CE_WARN
, "zfs: bad vnode ops template");
2152 (void) vfs_freevfsops_by_type(zfsfstype
);
2156 mutex_init(&zfs_dev_mtx
, NULL
, MUTEX_DEFAULT
, NULL
);
2159 * Unique major number for all zfs mounts.
2160 * If we run out of 32-bit minors, we'll getudev() another major.
2162 zfs_major
= ddi_name_to_major(ZFS_DRIVER
);
2163 zfs_minor
= ZFS_MIN_MINOR
;
2172 * Initialize .zfs directory structures
2177 * Initialize znode cache, vnode ops, etc...
2181 dmu_objset_register_type(DMU_OST_ZFS
, zfs_space_delta_cb
);
2194 return (zfs_active_fs_count
!= 0);
2198 zfs_set_version(zfsvfs_t
*zfsvfs
, uint64_t newvers
)
2201 objset_t
*os
= zfsvfs
->z_os
;
2204 if (newvers
< ZPL_VERSION_INITIAL
|| newvers
> ZPL_VERSION
)
2207 if (newvers
< zfsvfs
->z_version
)
2210 if (zfs_spa_version_map(newvers
) >
2211 spa_version(dmu_objset_spa(zfsvfs
->z_os
)))
2214 tx
= dmu_tx_create(os
);
2215 dmu_tx_hold_zap(tx
, MASTER_NODE_OBJ
, B_FALSE
, ZPL_VERSION_STR
);
2216 if (newvers
>= ZPL_VERSION_SA
&& !zfsvfs
->z_use_sa
) {
2217 dmu_tx_hold_zap(tx
, MASTER_NODE_OBJ
, B_TRUE
,
2219 dmu_tx_hold_zap(tx
, DMU_NEW_OBJECT
, FALSE
, NULL
);
2221 error
= dmu_tx_assign(tx
, TXG_WAIT
);
2227 error
= zap_update(os
, MASTER_NODE_OBJ
, ZPL_VERSION_STR
,
2228 8, 1, &newvers
, tx
);
2235 if (newvers
>= ZPL_VERSION_SA
&& !zfsvfs
->z_use_sa
) {
2238 ASSERT3U(spa_version(dmu_objset_spa(zfsvfs
->z_os
)), >=,
2240 sa_obj
= zap_create(os
, DMU_OT_SA_MASTER_NODE
,
2241 DMU_OT_NONE
, 0, tx
);
2243 error
= zap_add(os
, MASTER_NODE_OBJ
,
2244 ZFS_SA_ATTRS
, 8, 1, &sa_obj
, tx
);
2245 ASSERT3U(error
, ==, 0);
2247 VERIFY(0 == sa_set_sa_object(os
, sa_obj
));
2248 sa_register_update_callback(os
, zfs_sa_upgrade
);
2251 spa_history_log_internal(LOG_DS_UPGRADE
,
2252 dmu_objset_spa(os
), tx
, "oldver=%llu newver=%llu dataset = %llu",
2253 zfsvfs
->z_version
, newvers
, dmu_objset_id(os
));
2257 zfsvfs
->z_version
= newvers
;
2259 zfs_set_fuid_feature(zfsvfs
);
2265 * Read a property stored within the master node.
2268 zfs_get_zplprop(objset_t
*os
, zfs_prop_t prop
, uint64_t *value
)
2274 * Look up the file system's value for the property. For the
2275 * version property, we look up a slightly different string.
2277 if (prop
== ZFS_PROP_VERSION
)
2278 pname
= ZPL_VERSION_STR
;
2280 pname
= zfs_prop_to_name(prop
);
2283 error
= zap_lookup(os
, MASTER_NODE_OBJ
, pname
, 8, 1, value
);
2285 if (error
== ENOENT
) {
2286 /* No value set, use the default value */
2288 case ZFS_PROP_VERSION
:
2289 *value
= ZPL_VERSION
;
2291 case ZFS_PROP_NORMALIZE
:
2292 case ZFS_PROP_UTF8ONLY
:
2296 *value
= ZFS_CASE_SENSITIVE
;
2306 static vfsdef_t vfw
= {
2310 VSW_HASPROTO
|VSW_CANRWRO
|VSW_CANREMOUNT
|VSW_VOLATILEDEV
|VSW_STATS
|
2315 struct modlfs zfs_modlfs
= {
2316 &mod_fsops
, "ZFS filesystem version " SPA_VERSION_STRING
, &vfw