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"
70 vfsops_t
*zfs_vfsops
= NULL
;
71 static major_t zfs_major
;
72 static minor_t zfs_minor
;
73 static kmutex_t zfs_dev_mtx
;
75 extern int sys_shutdown
;
77 static int zfs_mount(vfs_t
*vfsp
, vnode_t
*mvp
, struct mounta
*uap
, cred_t
*cr
);
78 static int zfs_mountroot(vfs_t
*vfsp
, enum whymountroot
);
79 static void zfs_freevfs(vfs_t
*vfsp
);
81 static const fs_operation_def_t zfs_vfsops_template
[] = {
82 VFSNAME_MOUNT
, { .vfs_mount
= zfs_mount
},
83 VFSNAME_MOUNTROOT
, { .vfs_mountroot
= zfs_mountroot
},
84 VFSNAME_UNMOUNT
, { .vfs_unmount
= zfs_umount
},
85 VFSNAME_ROOT
, { .vfs_root
= zfs_root
},
86 VFSNAME_STATVFS
, { .vfs_statvfs
= zfs_statvfs
},
87 VFSNAME_SYNC
, { .vfs_sync
= zfs_sync
},
88 VFSNAME_VGET
, { .vfs_vget
= zfs_vget
},
89 VFSNAME_FREEVFS
, { .vfs_freevfs
= zfs_freevfs
},
93 static const fs_operation_def_t zfs_vfsops_eio_template
[] = {
94 VFSNAME_FREEVFS
, { .vfs_freevfs
= zfs_freevfs
},
99 * We need to keep a count of active fs's.
100 * This is necessary to prevent our module
101 * from being unloaded after a umount -f
103 static uint32_t zfs_active_fs_count
= 0;
105 static char *noatime_cancel
[] = { MNTOPT_ATIME
, NULL
};
106 static char *atime_cancel
[] = { MNTOPT_NOATIME
, NULL
};
107 static char *noxattr_cancel
[] = { MNTOPT_XATTR
, NULL
};
108 static char *xattr_cancel
[] = { MNTOPT_NOXATTR
, NULL
};
111 * MO_DEFAULT is not used since the default value is determined
112 * by the equivalent property.
114 static mntopt_t mntopts
[] = {
115 { MNTOPT_NOXATTR
, noxattr_cancel
, NULL
, 0, NULL
},
116 { MNTOPT_XATTR
, xattr_cancel
, NULL
, 0, NULL
},
117 { MNTOPT_NOATIME
, noatime_cancel
, NULL
, 0, NULL
},
118 { MNTOPT_ATIME
, atime_cancel
, NULL
, 0, NULL
}
121 static mntopts_t zfs_mntopts
= {
122 sizeof (mntopts
) / sizeof (mntopt_t
),
128 zfs_sync(vfs_t
*vfsp
, short flag
, cred_t
*cr
)
131 * Data integrity is job one. We don't want a compromised kernel
132 * writing to the storage pool, so we never sync during panic.
138 * SYNC_ATTR is used by fsflush() to force old filesystems like UFS
139 * to sync metadata, which they would otherwise cache indefinitely.
140 * Semantically, the only requirement is that the sync be initiated.
141 * The DMU syncs out txgs frequently, so there's nothing to do.
143 if (flag
& SYNC_ATTR
)
148 * Sync a specific filesystem.
150 zfsvfs_t
*zfsvfs
= vfsp
->vfs_data
;
154 dp
= dmu_objset_pool(zfsvfs
->z_os
);
157 * If the system is shutting down, then skip any
158 * filesystems which may exist on a suspended pool.
160 if (sys_shutdown
&& spa_suspended(dp
->dp_spa
)) {
165 if (zfsvfs
->z_log
!= NULL
)
166 zil_commit(zfsvfs
->z_log
, 0);
171 * Sync all ZFS filesystems. This is what happens when you
172 * run sync(1M). Unlike other filesystems, ZFS honors the
173 * request by waiting for all pools to commit all dirty data.
180 EXPORT_SYMBOL(zfs_sync
);
183 zfs_create_unique_device(dev_t
*dev
)
188 ASSERT3U(zfs_minor
, <=, MAXMIN32
);
189 minor_t start
= zfs_minor
;
191 mutex_enter(&zfs_dev_mtx
);
192 if (zfs_minor
>= MAXMIN32
) {
194 * If we're still using the real major
195 * keep out of /dev/zfs and /dev/zvol minor
196 * number space. If we're using a getudev()'ed
197 * major number, we can use all of its minors.
199 if (zfs_major
== ddi_name_to_major(ZFS_DRIVER
))
200 zfs_minor
= ZFS_MIN_MINOR
;
206 *dev
= makedevice(zfs_major
, zfs_minor
);
207 mutex_exit(&zfs_dev_mtx
);
208 } while (vfs_devismounted(*dev
) && zfs_minor
!= start
);
209 if (zfs_minor
== start
) {
211 * We are using all ~262,000 minor numbers for the
212 * current major number. Create a new major number.
214 if ((new_major
= getudev()) == (major_t
)-1) {
216 "zfs_mount: Can't get unique major "
220 mutex_enter(&zfs_dev_mtx
);
221 zfs_major
= new_major
;
224 mutex_exit(&zfs_dev_mtx
);
228 /* CONSTANTCONDITION */
235 atime_changed_cb(void *arg
, uint64_t newval
)
237 zfsvfs_t
*zfsvfs
= arg
;
239 if (newval
== TRUE
) {
240 zfsvfs
->z_atime
= TRUE
;
241 vfs_clearmntopt(zfsvfs
->z_vfs
, MNTOPT_NOATIME
);
242 vfs_setmntopt(zfsvfs
->z_vfs
, MNTOPT_ATIME
, NULL
, 0);
244 zfsvfs
->z_atime
= FALSE
;
245 vfs_clearmntopt(zfsvfs
->z_vfs
, MNTOPT_ATIME
);
246 vfs_setmntopt(zfsvfs
->z_vfs
, MNTOPT_NOATIME
, NULL
, 0);
251 xattr_changed_cb(void *arg
, uint64_t newval
)
253 zfsvfs_t
*zfsvfs
= arg
;
255 if (newval
== TRUE
) {
256 /* XXX locking on vfs_flag? */
257 zfsvfs
->z_vfs
->vfs_flag
|= VFS_XATTR
;
258 vfs_clearmntopt(zfsvfs
->z_vfs
, MNTOPT_NOXATTR
);
259 vfs_setmntopt(zfsvfs
->z_vfs
, MNTOPT_XATTR
, NULL
, 0);
261 /* XXX locking on vfs_flag? */
262 zfsvfs
->z_vfs
->vfs_flag
&= ~VFS_XATTR
;
263 vfs_clearmntopt(zfsvfs
->z_vfs
, MNTOPT_XATTR
);
264 vfs_setmntopt(zfsvfs
->z_vfs
, MNTOPT_NOXATTR
, NULL
, 0);
269 blksz_changed_cb(void *arg
, uint64_t newval
)
271 zfsvfs_t
*zfsvfs
= arg
;
273 if (newval
< SPA_MINBLOCKSIZE
||
274 newval
> SPA_MAXBLOCKSIZE
|| !ISP2(newval
))
275 newval
= SPA_MAXBLOCKSIZE
;
277 zfsvfs
->z_max_blksz
= newval
;
278 zfsvfs
->z_vfs
->vfs_bsize
= newval
;
282 readonly_changed_cb(void *arg
, uint64_t newval
)
284 zfsvfs_t
*zfsvfs
= arg
;
287 /* XXX locking on vfs_flag? */
288 zfsvfs
->z_vfs
->vfs_flag
|= VFS_RDONLY
;
289 vfs_clearmntopt(zfsvfs
->z_vfs
, MNTOPT_RW
);
290 vfs_setmntopt(zfsvfs
->z_vfs
, MNTOPT_RO
, NULL
, 0);
292 /* XXX locking on vfs_flag? */
293 zfsvfs
->z_vfs
->vfs_flag
&= ~VFS_RDONLY
;
294 vfs_clearmntopt(zfsvfs
->z_vfs
, MNTOPT_RO
);
295 vfs_setmntopt(zfsvfs
->z_vfs
, MNTOPT_RW
, NULL
, 0);
300 devices_changed_cb(void *arg
, uint64_t newval
)
302 zfsvfs_t
*zfsvfs
= arg
;
304 if (newval
== FALSE
) {
305 zfsvfs
->z_vfs
->vfs_flag
|= VFS_NODEVICES
;
306 vfs_clearmntopt(zfsvfs
->z_vfs
, MNTOPT_DEVICES
);
307 vfs_setmntopt(zfsvfs
->z_vfs
, MNTOPT_NODEVICES
, NULL
, 0);
309 zfsvfs
->z_vfs
->vfs_flag
&= ~VFS_NODEVICES
;
310 vfs_clearmntopt(zfsvfs
->z_vfs
, MNTOPT_NODEVICES
);
311 vfs_setmntopt(zfsvfs
->z_vfs
, MNTOPT_DEVICES
, NULL
, 0);
316 setuid_changed_cb(void *arg
, uint64_t newval
)
318 zfsvfs_t
*zfsvfs
= arg
;
320 if (newval
== FALSE
) {
321 zfsvfs
->z_vfs
->vfs_flag
|= VFS_NOSETUID
;
322 vfs_clearmntopt(zfsvfs
->z_vfs
, MNTOPT_SETUID
);
323 vfs_setmntopt(zfsvfs
->z_vfs
, MNTOPT_NOSETUID
, NULL
, 0);
325 zfsvfs
->z_vfs
->vfs_flag
&= ~VFS_NOSETUID
;
326 vfs_clearmntopt(zfsvfs
->z_vfs
, MNTOPT_NOSETUID
);
327 vfs_setmntopt(zfsvfs
->z_vfs
, MNTOPT_SETUID
, NULL
, 0);
332 exec_changed_cb(void *arg
, uint64_t newval
)
334 zfsvfs_t
*zfsvfs
= arg
;
336 if (newval
== FALSE
) {
337 zfsvfs
->z_vfs
->vfs_flag
|= VFS_NOEXEC
;
338 vfs_clearmntopt(zfsvfs
->z_vfs
, MNTOPT_EXEC
);
339 vfs_setmntopt(zfsvfs
->z_vfs
, MNTOPT_NOEXEC
, NULL
, 0);
341 zfsvfs
->z_vfs
->vfs_flag
&= ~VFS_NOEXEC
;
342 vfs_clearmntopt(zfsvfs
->z_vfs
, MNTOPT_NOEXEC
);
343 vfs_setmntopt(zfsvfs
->z_vfs
, MNTOPT_EXEC
, NULL
, 0);
348 * The nbmand mount option can be changed at mount time.
349 * We can't allow it to be toggled on live file systems or incorrect
350 * behavior may be seen from cifs clients
352 * This property isn't registered via dsl_prop_register(), but this callback
353 * will be called when a file system is first mounted
356 nbmand_changed_cb(void *arg
, uint64_t newval
)
358 zfsvfs_t
*zfsvfs
= arg
;
359 if (newval
== FALSE
) {
360 vfs_clearmntopt(zfsvfs
->z_vfs
, MNTOPT_NBMAND
);
361 vfs_setmntopt(zfsvfs
->z_vfs
, MNTOPT_NONBMAND
, NULL
, 0);
363 vfs_clearmntopt(zfsvfs
->z_vfs
, MNTOPT_NONBMAND
);
364 vfs_setmntopt(zfsvfs
->z_vfs
, MNTOPT_NBMAND
, NULL
, 0);
369 snapdir_changed_cb(void *arg
, uint64_t newval
)
371 zfsvfs_t
*zfsvfs
= arg
;
373 zfsvfs
->z_show_ctldir
= newval
;
377 vscan_changed_cb(void *arg
, uint64_t newval
)
379 zfsvfs_t
*zfsvfs
= arg
;
381 zfsvfs
->z_vscan
= newval
;
385 acl_inherit_changed_cb(void *arg
, uint64_t newval
)
387 zfsvfs_t
*zfsvfs
= arg
;
389 zfsvfs
->z_acl_inherit
= newval
;
393 zfs_register_callbacks(vfs_t
*vfsp
)
395 struct dsl_dataset
*ds
= NULL
;
397 zfsvfs_t
*zfsvfs
= NULL
;
399 int readonly
, do_readonly
= B_FALSE
;
400 int setuid
, do_setuid
= B_FALSE
;
401 int exec
, do_exec
= B_FALSE
;
402 int devices
, do_devices
= B_FALSE
;
403 int xattr
, do_xattr
= B_FALSE
;
404 int atime
, do_atime
= B_FALSE
;
408 zfsvfs
= vfsp
->vfs_data
;
413 * The act of registering our callbacks will destroy any mount
414 * options we may have. In order to enable temporary overrides
415 * of mount options, we stash away the current values and
416 * restore them after we register the callbacks.
418 if (vfs_optionisset(vfsp
, MNTOPT_RO
, NULL
) ||
419 !spa_writeable(dmu_objset_spa(os
))) {
421 do_readonly
= B_TRUE
;
422 } else if (vfs_optionisset(vfsp
, MNTOPT_RW
, NULL
)) {
424 do_readonly
= B_TRUE
;
426 if (vfs_optionisset(vfsp
, MNTOPT_NOSUID
, NULL
)) {
432 if (vfs_optionisset(vfsp
, MNTOPT_NODEVICES
, NULL
)) {
435 } else if (vfs_optionisset(vfsp
, MNTOPT_DEVICES
, NULL
)) {
440 if (vfs_optionisset(vfsp
, MNTOPT_NOSETUID
, NULL
)) {
443 } else if (vfs_optionisset(vfsp
, MNTOPT_SETUID
, NULL
)) {
448 if (vfs_optionisset(vfsp
, MNTOPT_NOEXEC
, NULL
)) {
451 } else if (vfs_optionisset(vfsp
, MNTOPT_EXEC
, NULL
)) {
455 if (vfs_optionisset(vfsp
, MNTOPT_NOXATTR
, NULL
)) {
458 } else if (vfs_optionisset(vfsp
, MNTOPT_XATTR
, NULL
)) {
462 if (vfs_optionisset(vfsp
, MNTOPT_NOATIME
, NULL
)) {
465 } else if (vfs_optionisset(vfsp
, MNTOPT_ATIME
, NULL
)) {
471 * nbmand is a special property. It can only be changed at
474 * This is weird, but it is documented to only be changeable
477 if (vfs_optionisset(vfsp
, MNTOPT_NONBMAND
, NULL
)) {
479 } else if (vfs_optionisset(vfsp
, MNTOPT_NBMAND
, NULL
)) {
482 char osname
[MAXNAMELEN
];
484 dmu_objset_name(os
, osname
);
485 if ((error
= dsl_prop_get_integer(osname
, "nbmand", &nbmand
,
492 * Register property callbacks.
494 * It would probably be fine to just check for i/o error from
495 * the first prop_register(), but I guess I like to go
498 ds
= dmu_objset_ds(os
);
499 error
= dsl_prop_register(ds
, "atime", atime_changed_cb
, zfsvfs
);
500 error
= error
? error
: dsl_prop_register(ds
,
501 "xattr", xattr_changed_cb
, zfsvfs
);
502 error
= error
? error
: dsl_prop_register(ds
,
503 "recordsize", blksz_changed_cb
, zfsvfs
);
504 error
= error
? error
: dsl_prop_register(ds
,
505 "readonly", readonly_changed_cb
, zfsvfs
);
506 error
= error
? error
: dsl_prop_register(ds
,
507 "devices", devices_changed_cb
, zfsvfs
);
508 error
= error
? error
: dsl_prop_register(ds
,
509 "setuid", setuid_changed_cb
, zfsvfs
);
510 error
= error
? error
: dsl_prop_register(ds
,
511 "exec", exec_changed_cb
, zfsvfs
);
512 error
= error
? error
: dsl_prop_register(ds
,
513 "snapdir", snapdir_changed_cb
, zfsvfs
);
514 error
= error
? error
: dsl_prop_register(ds
,
515 "aclinherit", acl_inherit_changed_cb
, zfsvfs
);
516 error
= error
? error
: dsl_prop_register(ds
,
517 "vscan", vscan_changed_cb
, zfsvfs
);
522 * Invoke our callbacks to restore temporary mount options.
525 readonly_changed_cb(zfsvfs
, readonly
);
527 setuid_changed_cb(zfsvfs
, setuid
);
529 exec_changed_cb(zfsvfs
, exec
);
531 devices_changed_cb(zfsvfs
, devices
);
533 xattr_changed_cb(zfsvfs
, xattr
);
535 atime_changed_cb(zfsvfs
, atime
);
537 nbmand_changed_cb(zfsvfs
, nbmand
);
543 * We may attempt to unregister some callbacks that are not
544 * registered, but this is OK; it will simply return ENOMSG,
545 * which we will ignore.
547 (void) dsl_prop_unregister(ds
, "atime", atime_changed_cb
, zfsvfs
);
548 (void) dsl_prop_unregister(ds
, "xattr", xattr_changed_cb
, zfsvfs
);
549 (void) dsl_prop_unregister(ds
, "recordsize", blksz_changed_cb
, zfsvfs
);
550 (void) dsl_prop_unregister(ds
, "readonly", readonly_changed_cb
, zfsvfs
);
551 (void) dsl_prop_unregister(ds
, "devices", devices_changed_cb
, zfsvfs
);
552 (void) dsl_prop_unregister(ds
, "setuid", setuid_changed_cb
, zfsvfs
);
553 (void) dsl_prop_unregister(ds
, "exec", exec_changed_cb
, zfsvfs
);
554 (void) dsl_prop_unregister(ds
, "snapdir", snapdir_changed_cb
, zfsvfs
);
555 (void) dsl_prop_unregister(ds
, "aclinherit", acl_inherit_changed_cb
,
557 (void) dsl_prop_unregister(ds
, "vscan", vscan_changed_cb
, zfsvfs
);
561 EXPORT_SYMBOL(zfs_register_callbacks
);
562 #endif /* HAVE_ZPL */
565 zfs_space_delta_cb(dmu_object_type_t bonustype
, void *data
,
566 uint64_t *userp
, uint64_t *groupp
)
568 znode_phys_t
*znp
= data
;
572 * Is it a valid type of object to track?
574 if (bonustype
!= DMU_OT_ZNODE
&& bonustype
!= DMU_OT_SA
)
578 * If we have a NULL data pointer
579 * then assume the id's aren't changing and
580 * return EEXIST to the dmu to let it know to
586 if (bonustype
== DMU_OT_ZNODE
) {
587 *userp
= znp
->zp_uid
;
588 *groupp
= znp
->zp_gid
;
592 ASSERT(bonustype
== DMU_OT_SA
);
593 hdrsize
= sa_hdrsize(data
);
596 *userp
= *((uint64_t *)((uintptr_t)data
+ hdrsize
+
598 *groupp
= *((uint64_t *)((uintptr_t)data
+ hdrsize
+
602 * This should only happen for newly created
603 * files that haven't had the znode data filled
615 fuidstr_to_sid(zfsvfs_t
*zfsvfs
, const char *fuidstr
,
616 char *domainbuf
, int buflen
, uid_t
*ridp
)
621 fuid
= strtonum(fuidstr
, NULL
);
623 domain
= zfs_fuid_find_by_idx(zfsvfs
, FUID_INDEX(fuid
));
625 (void) strlcpy(domainbuf
, domain
, buflen
);
628 *ridp
= FUID_RID(fuid
);
632 zfs_userquota_prop_to_obj(zfsvfs_t
*zfsvfs
, zfs_userquota_prop_t type
)
635 case ZFS_PROP_USERUSED
:
636 return (DMU_USERUSED_OBJECT
);
637 case ZFS_PROP_GROUPUSED
:
638 return (DMU_GROUPUSED_OBJECT
);
639 case ZFS_PROP_USERQUOTA
:
640 return (zfsvfs
->z_userquota_obj
);
641 case ZFS_PROP_GROUPQUOTA
:
642 return (zfsvfs
->z_groupquota_obj
);
650 zfs_userspace_many(zfsvfs_t
*zfsvfs
, zfs_userquota_prop_t type
,
651 uint64_t *cookiep
, void *vbuf
, uint64_t *bufsizep
)
656 zfs_useracct_t
*buf
= vbuf
;
659 if (!dmu_objset_userspace_present(zfsvfs
->z_os
))
662 obj
= zfs_userquota_prop_to_obj(zfsvfs
, type
);
668 for (zap_cursor_init_serialized(&zc
, zfsvfs
->z_os
, obj
, *cookiep
);
669 (error
= zap_cursor_retrieve(&zc
, &za
)) == 0;
670 zap_cursor_advance(&zc
)) {
671 if ((uintptr_t)buf
- (uintptr_t)vbuf
+ sizeof (zfs_useracct_t
) >
675 fuidstr_to_sid(zfsvfs
, za
.za_name
,
676 buf
->zu_domain
, sizeof (buf
->zu_domain
), &buf
->zu_rid
);
678 buf
->zu_space
= za
.za_first_integer
;
684 ASSERT3U((uintptr_t)buf
- (uintptr_t)vbuf
, <=, *bufsizep
);
685 *bufsizep
= (uintptr_t)buf
- (uintptr_t)vbuf
;
686 *cookiep
= zap_cursor_serialize(&zc
);
687 zap_cursor_fini(&zc
);
690 EXPORT_SYMBOL(zfs_userspace_many
);
693 * buf must be big enough (eg, 32 bytes)
696 id_to_fuidstr(zfsvfs_t
*zfsvfs
, const char *domain
, uid_t rid
,
697 char *buf
, boolean_t addok
)
702 if (domain
&& domain
[0]) {
703 domainid
= zfs_fuid_find_by_domain(zfsvfs
, domain
, NULL
, addok
);
707 fuid
= FUID_ENCODE(domainid
, rid
);
708 (void) sprintf(buf
, "%llx", (longlong_t
)fuid
);
713 zfs_userspace_one(zfsvfs_t
*zfsvfs
, zfs_userquota_prop_t type
,
714 const char *domain
, uint64_t rid
, uint64_t *valp
)
722 if (!dmu_objset_userspace_present(zfsvfs
->z_os
))
725 obj
= zfs_userquota_prop_to_obj(zfsvfs
, type
);
729 err
= id_to_fuidstr(zfsvfs
, domain
, rid
, buf
, B_FALSE
);
733 err
= zap_lookup(zfsvfs
->z_os
, obj
, buf
, 8, 1, valp
);
738 EXPORT_SYMBOL(zfs_userspace_one
);
741 zfs_set_userquota(zfsvfs_t
*zfsvfs
, zfs_userquota_prop_t type
,
742 const char *domain
, uint64_t rid
, uint64_t quota
)
748 boolean_t fuid_dirtied
;
750 if (type
!= ZFS_PROP_USERQUOTA
&& type
!= ZFS_PROP_GROUPQUOTA
)
753 if (zfsvfs
->z_version
< ZPL_VERSION_USERSPACE
)
756 objp
= (type
== ZFS_PROP_USERQUOTA
) ? &zfsvfs
->z_userquota_obj
:
757 &zfsvfs
->z_groupquota_obj
;
759 err
= id_to_fuidstr(zfsvfs
, domain
, rid
, buf
, B_TRUE
);
762 fuid_dirtied
= zfsvfs
->z_fuid_dirty
;
764 tx
= dmu_tx_create(zfsvfs
->z_os
);
765 dmu_tx_hold_zap(tx
, *objp
? *objp
: DMU_NEW_OBJECT
, B_TRUE
, NULL
);
767 dmu_tx_hold_zap(tx
, MASTER_NODE_OBJ
, B_TRUE
,
768 zfs_userquota_prop_prefixes
[type
]);
771 zfs_fuid_txhold(zfsvfs
, tx
);
772 err
= dmu_tx_assign(tx
, TXG_WAIT
);
778 mutex_enter(&zfsvfs
->z_lock
);
780 *objp
= zap_create(zfsvfs
->z_os
, DMU_OT_USERGROUP_QUOTA
,
782 VERIFY(0 == zap_add(zfsvfs
->z_os
, MASTER_NODE_OBJ
,
783 zfs_userquota_prop_prefixes
[type
], 8, 1, objp
, tx
));
785 mutex_exit(&zfsvfs
->z_lock
);
788 err
= zap_remove(zfsvfs
->z_os
, *objp
, buf
, tx
);
792 err
= zap_update(zfsvfs
->z_os
, *objp
, buf
, 8, 1, "a
, tx
);
796 zfs_fuid_sync(zfsvfs
, tx
);
800 EXPORT_SYMBOL(zfs_set_userquota
);
803 zfs_fuid_overquota(zfsvfs_t
*zfsvfs
, boolean_t isgroup
, uint64_t fuid
)
806 uint64_t used
, quota
, usedobj
, quotaobj
;
809 usedobj
= isgroup
? DMU_GROUPUSED_OBJECT
: DMU_USERUSED_OBJECT
;
810 quotaobj
= isgroup
? zfsvfs
->z_groupquota_obj
: zfsvfs
->z_userquota_obj
;
812 if (quotaobj
== 0 || zfsvfs
->z_replay
)
815 (void) sprintf(buf
, "%llx", (longlong_t
)fuid
);
816 err
= zap_lookup(zfsvfs
->z_os
, quotaobj
, buf
, 8, 1, "a
);
820 err
= zap_lookup(zfsvfs
->z_os
, usedobj
, buf
, 8, 1, &used
);
823 return (used
>= quota
);
825 EXPORT_SYMBOL(zfs_fuid_overquota
);
828 zfs_owner_overquota(zfsvfs_t
*zfsvfs
, znode_t
*zp
, boolean_t isgroup
)
833 quotaobj
= isgroup
? zfsvfs
->z_groupquota_obj
: zfsvfs
->z_userquota_obj
;
835 fuid
= isgroup
? zp
->z_gid
: zp
->z_uid
;
837 if (quotaobj
== 0 || zfsvfs
->z_replay
)
840 return (zfs_fuid_overquota(zfsvfs
, isgroup
, fuid
));
842 EXPORT_SYMBOL(zfs_owner_overquota
);
845 zfsvfs_create(const char *osname
, zfsvfs_t
**zfvp
)
853 zfsvfs
= kmem_zalloc(sizeof (zfsvfs_t
), KM_SLEEP
);
856 * We claim to always be readonly so we can open snapshots;
857 * other ZPL code will prevent us from writing to snapshots.
859 error
= dmu_objset_own(osname
, DMU_OST_ZFS
, B_TRUE
, zfsvfs
, &os
);
861 kmem_free(zfsvfs
, sizeof (zfsvfs_t
));
866 * Initialize the zfs-specific filesystem structure.
867 * Should probably make this a kmem cache, shuffle fields,
868 * and just bzero up to z_hold_mtx[].
870 zfsvfs
->z_vfs
= NULL
;
871 zfsvfs
->z_parent
= zfsvfs
;
872 zfsvfs
->z_max_blksz
= SPA_MAXBLOCKSIZE
;
873 zfsvfs
->z_show_ctldir
= ZFS_SNAPDIR_VISIBLE
;
876 error
= zfs_get_zplprop(os
, ZFS_PROP_VERSION
, &zfsvfs
->z_version
);
879 } else if (zfsvfs
->z_version
>
880 zfs_zpl_version_map(spa_version(dmu_objset_spa(os
)))) {
881 (void) printk("Can't mount a version %lld file system "
882 "on a version %lld pool\n. Pool must be upgraded to mount "
883 "this file system.", (u_longlong_t
)zfsvfs
->z_version
,
884 (u_longlong_t
)spa_version(dmu_objset_spa(os
)));
888 if ((error
= zfs_get_zplprop(os
, ZFS_PROP_NORMALIZE
, &zval
)) != 0)
890 zfsvfs
->z_norm
= (int)zval
;
892 if ((error
= zfs_get_zplprop(os
, ZFS_PROP_UTF8ONLY
, &zval
)) != 0)
894 zfsvfs
->z_utf8
= (zval
!= 0);
896 if ((error
= zfs_get_zplprop(os
, ZFS_PROP_CASE
, &zval
)) != 0)
898 zfsvfs
->z_case
= (uint_t
)zval
;
901 * Fold case on file systems that are always or sometimes case
904 if (zfsvfs
->z_case
== ZFS_CASE_INSENSITIVE
||
905 zfsvfs
->z_case
== ZFS_CASE_MIXED
)
906 zfsvfs
->z_norm
|= U8_TEXTPREP_TOUPPER
;
908 zfsvfs
->z_use_fuids
= USE_FUIDS(zfsvfs
->z_version
, zfsvfs
->z_os
);
909 zfsvfs
->z_use_sa
= USE_SA(zfsvfs
->z_version
, zfsvfs
->z_os
);
911 if (zfsvfs
->z_use_sa
) {
912 /* should either have both of these objects or none */
913 error
= zap_lookup(os
, MASTER_NODE_OBJ
, ZFS_SA_ATTRS
, 8, 1,
919 * Pre SA versions file systems should never touch
920 * either the attribute registration or layout objects.
925 error
= sa_setup(os
, sa_obj
, zfs_attr_table
, ZPL_END
,
926 &zfsvfs
->z_attr_table
);
930 if (zfsvfs
->z_version
>= ZPL_VERSION_SA
)
931 sa_register_update_callback(os
, zfs_sa_upgrade
);
933 error
= zap_lookup(os
, MASTER_NODE_OBJ
, ZFS_ROOT_OBJ
, 8, 1,
937 ASSERT(zfsvfs
->z_root
!= 0);
939 error
= zap_lookup(os
, MASTER_NODE_OBJ
, ZFS_UNLINKED_SET
, 8, 1,
940 &zfsvfs
->z_unlinkedobj
);
944 error
= zap_lookup(os
, MASTER_NODE_OBJ
,
945 zfs_userquota_prop_prefixes
[ZFS_PROP_USERQUOTA
],
946 8, 1, &zfsvfs
->z_userquota_obj
);
947 if (error
&& error
!= ENOENT
)
950 error
= zap_lookup(os
, MASTER_NODE_OBJ
,
951 zfs_userquota_prop_prefixes
[ZFS_PROP_GROUPQUOTA
],
952 8, 1, &zfsvfs
->z_groupquota_obj
);
953 if (error
&& error
!= ENOENT
)
956 error
= zap_lookup(os
, MASTER_NODE_OBJ
, ZFS_FUID_TABLES
, 8, 1,
957 &zfsvfs
->z_fuid_obj
);
958 if (error
&& error
!= ENOENT
)
961 error
= zap_lookup(os
, MASTER_NODE_OBJ
, ZFS_SHARES_DIR
, 8, 1,
962 &zfsvfs
->z_shares_dir
);
963 if (error
&& error
!= ENOENT
)
966 mutex_init(&zfsvfs
->z_znodes_lock
, NULL
, MUTEX_DEFAULT
, NULL
);
967 mutex_init(&zfsvfs
->z_lock
, NULL
, MUTEX_DEFAULT
, NULL
);
968 list_create(&zfsvfs
->z_all_znodes
, sizeof (znode_t
),
969 offsetof(znode_t
, z_link_node
));
970 rrw_init(&zfsvfs
->z_teardown_lock
);
971 rw_init(&zfsvfs
->z_teardown_inactive_lock
, NULL
, RW_DEFAULT
, NULL
);
972 rw_init(&zfsvfs
->z_fuid_lock
, NULL
, RW_DEFAULT
, NULL
);
973 for (i
= 0; i
!= ZFS_OBJ_MTX_SZ
; i
++)
974 mutex_init(&zfsvfs
->z_hold_mtx
[i
], NULL
, MUTEX_DEFAULT
, NULL
);
980 dmu_objset_disown(os
, zfsvfs
);
982 kmem_free(zfsvfs
, sizeof (zfsvfs_t
));
987 zfsvfs_setup(zfsvfs_t
*zfsvfs
, boolean_t mounting
)
991 error
= zfs_register_callbacks(zfsvfs
->z_vfs
);
996 * Set the objset user_ptr to track its zfsvfs.
998 mutex_enter(&zfsvfs
->z_os
->os_user_ptr_lock
);
999 dmu_objset_set_user(zfsvfs
->z_os
, zfsvfs
);
1000 mutex_exit(&zfsvfs
->z_os
->os_user_ptr_lock
);
1002 zfsvfs
->z_log
= zil_open(zfsvfs
->z_os
, zfs_get_data
);
1005 * If we are not mounting (ie: online recv), then we don't
1006 * have to worry about replaying the log as we blocked all
1007 * operations out since we closed the ZIL.
1013 * During replay we remove the read only flag to
1014 * allow replays to succeed.
1016 readonly
= zfsvfs
->z_vfs
->vfs_flag
& VFS_RDONLY
;
1018 zfsvfs
->z_vfs
->vfs_flag
&= ~VFS_RDONLY
;
1020 zfs_unlinked_drain(zfsvfs
);
1023 * Parse and replay the intent log.
1025 * Because of ziltest, this must be done after
1026 * zfs_unlinked_drain(). (Further note: ziltest
1027 * doesn't use readonly mounts, where
1028 * zfs_unlinked_drain() isn't called.) This is because
1029 * ziltest causes spa_sync() to think it's committed,
1030 * but actually it is not, so the intent log contains
1031 * many txg's worth of changes.
1033 * In particular, if object N is in the unlinked set in
1034 * the last txg to actually sync, then it could be
1035 * actually freed in a later txg and then reallocated
1036 * in a yet later txg. This would write a "create
1037 * object N" record to the intent log. Normally, this
1038 * would be fine because the spa_sync() would have
1039 * written out the fact that object N is free, before
1040 * we could write the "create object N" intent log
1043 * But when we are in ziltest mode, we advance the "open
1044 * txg" without actually spa_sync()-ing the changes to
1045 * disk. So we would see that object N is still
1046 * allocated and in the unlinked set, and there is an
1047 * intent log record saying to allocate it.
1049 if (spa_writeable(dmu_objset_spa(zfsvfs
->z_os
))) {
1050 if (zil_replay_disable
) {
1051 zil_destroy(zfsvfs
->z_log
, B_FALSE
);
1053 zfsvfs
->z_replay
= B_TRUE
;
1054 zil_replay(zfsvfs
->z_os
, zfsvfs
,
1056 zfsvfs
->z_replay
= B_FALSE
;
1059 zfsvfs
->z_vfs
->vfs_flag
|= readonly
; /* restore readonly bit */
1066 zfsvfs_free(zfsvfs_t
*zfsvfs
)
1069 extern krwlock_t zfsvfs_lock
; /* in zfs_znode.c */
1072 * This is a barrier to prevent the filesystem from going away in
1073 * zfs_znode_move() until we can safely ensure that the filesystem is
1074 * not unmounted. We consider the filesystem valid before the barrier
1075 * and invalid after the barrier.
1077 rw_enter(&zfsvfs_lock
, RW_READER
);
1078 rw_exit(&zfsvfs_lock
);
1080 zfs_fuid_destroy(zfsvfs
);
1082 mutex_destroy(&zfsvfs
->z_znodes_lock
);
1083 mutex_destroy(&zfsvfs
->z_lock
);
1084 list_destroy(&zfsvfs
->z_all_znodes
);
1085 rrw_destroy(&zfsvfs
->z_teardown_lock
);
1086 rw_destroy(&zfsvfs
->z_teardown_inactive_lock
);
1087 rw_destroy(&zfsvfs
->z_fuid_lock
);
1088 for (i
= 0; i
!= ZFS_OBJ_MTX_SZ
; i
++)
1089 mutex_destroy(&zfsvfs
->z_hold_mtx
[i
]);
1090 kmem_free(zfsvfs
, sizeof (zfsvfs_t
));
1094 zfs_set_fuid_feature(zfsvfs_t
*zfsvfs
)
1096 zfsvfs
->z_use_fuids
= USE_FUIDS(zfsvfs
->z_version
, zfsvfs
->z_os
);
1097 if (zfsvfs
->z_use_fuids
&& zfsvfs
->z_vfs
) {
1098 vfs_set_feature(zfsvfs
->z_vfs
, VFSFT_XVATTR
);
1099 vfs_set_feature(zfsvfs
->z_vfs
, VFSFT_SYSATTR_VIEWS
);
1100 vfs_set_feature(zfsvfs
->z_vfs
, VFSFT_ACEMASKONACCESS
);
1101 vfs_set_feature(zfsvfs
->z_vfs
, VFSFT_ACLONCREATE
);
1102 vfs_set_feature(zfsvfs
->z_vfs
, VFSFT_ACCESS_FILTER
);
1103 vfs_set_feature(zfsvfs
->z_vfs
, VFSFT_REPARSE
);
1105 zfsvfs
->z_use_sa
= USE_SA(zfsvfs
->z_version
, zfsvfs
->z_os
);
1109 zfs_domount(vfs_t
*vfsp
, char *osname
)
1112 uint64_t recordsize
, fsid_guid
;
1119 error
= zfsvfs_create(osname
, &zfsvfs
);
1122 zfsvfs
->z_vfs
= vfsp
;
1124 /* Initialize the generic filesystem structure. */
1125 vfsp
->vfs_bcount
= 0;
1126 vfsp
->vfs_data
= NULL
;
1128 if (zfs_create_unique_device(&mount_dev
) == -1) {
1132 ASSERT(vfs_devismounted(mount_dev
) == 0);
1134 if ((error
= dsl_prop_get_integer(osname
, "recordsize",
1135 &recordsize
, NULL
)))
1138 vfsp
->vfs_dev
= mount_dev
;
1139 vfsp
->vfs_fstype
= zfsfstype
;
1140 vfsp
->vfs_bsize
= recordsize
;
1141 vfsp
->vfs_flag
|= VFS_NOTRUNC
;
1142 vfsp
->vfs_data
= zfsvfs
;
1145 * The fsid is 64 bits, composed of an 8-bit fs type, which
1146 * separates our fsid from any other filesystem types, and a
1147 * 56-bit objset unique ID. The objset unique ID is unique to
1148 * all objsets open on this system, provided by unique_create().
1149 * The 8-bit fs type must be put in the low bits of fsid[1]
1150 * because that's where other Solaris filesystems put it.
1152 fsid_guid
= dmu_objset_fsid_guid(zfsvfs
->z_os
);
1153 ASSERT((fsid_guid
& ~((1ULL<<56)-1)) == 0);
1154 vfsp
->vfs_fsid
.val
[0] = fsid_guid
;
1155 vfsp
->vfs_fsid
.val
[1] = ((fsid_guid
>>32) << 8) |
1159 * Set features for file system.
1161 zfs_set_fuid_feature(zfsvfs
);
1162 if (zfsvfs
->z_case
== ZFS_CASE_INSENSITIVE
) {
1163 vfs_set_feature(vfsp
, VFSFT_DIRENTFLAGS
);
1164 vfs_set_feature(vfsp
, VFSFT_CASEINSENSITIVE
);
1165 vfs_set_feature(vfsp
, VFSFT_NOCASESENSITIVE
);
1166 } else if (zfsvfs
->z_case
== ZFS_CASE_MIXED
) {
1167 vfs_set_feature(vfsp
, VFSFT_DIRENTFLAGS
);
1168 vfs_set_feature(vfsp
, VFSFT_CASEINSENSITIVE
);
1170 vfs_set_feature(vfsp
, VFSFT_ZEROCOPY_SUPPORTED
);
1172 if (dmu_objset_is_snapshot(zfsvfs
->z_os
)) {
1175 atime_changed_cb(zfsvfs
, B_FALSE
);
1176 readonly_changed_cb(zfsvfs
, B_TRUE
);
1177 if ((error
= dsl_prop_get_integer(osname
,"xattr",&pval
,NULL
)))
1179 xattr_changed_cb(zfsvfs
, pval
);
1180 zfsvfs
->z_issnap
= B_TRUE
;
1181 zfsvfs
->z_os
->os_sync
= ZFS_SYNC_DISABLED
;
1183 mutex_enter(&zfsvfs
->z_os
->os_user_ptr_lock
);
1184 dmu_objset_set_user(zfsvfs
->z_os
, zfsvfs
);
1185 mutex_exit(&zfsvfs
->z_os
->os_user_ptr_lock
);
1187 error
= zfsvfs_setup(zfsvfs
, B_TRUE
);
1190 if (!zfsvfs
->z_issnap
)
1191 zfsctl_create(zfsvfs
);
1194 dmu_objset_disown(zfsvfs
->z_os
, zfsvfs
);
1195 zfsvfs_free(zfsvfs
);
1197 atomic_add_32(&zfs_active_fs_count
, 1);
1202 EXPORT_SYMBOL(zfs_domount
);
1205 zfs_unregister_callbacks(zfsvfs_t
*zfsvfs
)
1207 objset_t
*os
= zfsvfs
->z_os
;
1208 struct dsl_dataset
*ds
;
1211 * Unregister properties.
1213 if (!dmu_objset_is_snapshot(os
)) {
1214 ds
= dmu_objset_ds(os
);
1215 VERIFY(dsl_prop_unregister(ds
, "atime", atime_changed_cb
,
1218 VERIFY(dsl_prop_unregister(ds
, "xattr", xattr_changed_cb
,
1221 VERIFY(dsl_prop_unregister(ds
, "recordsize", blksz_changed_cb
,
1224 VERIFY(dsl_prop_unregister(ds
, "readonly", readonly_changed_cb
,
1227 VERIFY(dsl_prop_unregister(ds
, "devices", devices_changed_cb
,
1230 VERIFY(dsl_prop_unregister(ds
, "setuid", setuid_changed_cb
,
1233 VERIFY(dsl_prop_unregister(ds
, "exec", exec_changed_cb
,
1236 VERIFY(dsl_prop_unregister(ds
, "snapdir", snapdir_changed_cb
,
1239 VERIFY(dsl_prop_unregister(ds
, "aclinherit",
1240 acl_inherit_changed_cb
, zfsvfs
) == 0);
1242 VERIFY(dsl_prop_unregister(ds
, "vscan",
1243 vscan_changed_cb
, zfsvfs
) == 0);
1246 EXPORT_SYMBOL(zfs_unregister_callbacks
);
1249 * Convert a decimal digit string to a uint64_t integer.
1252 str_to_uint64(char *str
, uint64_t *objnum
)
1257 if (*str
< '0' || *str
> '9')
1260 num
= num
*10 + *str
++ - '0';
1268 * The boot path passed from the boot loader is in the form of
1269 * "rootpool-name/root-filesystem-object-number'. Convert this
1270 * string to a dataset name: "rootpool-name/root-filesystem-name".
1273 zfs_parse_bootfs(char *bpath
, char *outpath
)
1279 if (*bpath
== 0 || *bpath
== '/')
1282 (void) strcpy(outpath
, bpath
);
1284 slashp
= strchr(bpath
, '/');
1286 /* if no '/', just return the pool name */
1287 if (slashp
== NULL
) {
1291 /* if not a number, just return the root dataset name */
1292 if (str_to_uint64(slashp
+1, &objnum
)) {
1297 error
= dsl_dsobj_to_dsname(bpath
, objnum
, outpath
);
1303 #ifdef HAVE_MLSLABEL
1305 * zfs_check_global_label:
1306 * Check that the hex label string is appropriate for the dataset
1307 * being mounted into the global_zone proper.
1309 * Return an error if the hex label string is not default or
1310 * admin_low/admin_high. For admin_low labels, the corresponding
1311 * dataset must be readonly.
1314 zfs_check_global_label(const char *dsname
, const char *hexsl
)
1316 if (strcasecmp(hexsl
, ZFS_MLSLABEL_DEFAULT
) == 0)
1318 if (strcasecmp(hexsl
, ADMIN_HIGH
) == 0)
1320 if (strcasecmp(hexsl
, ADMIN_LOW
) == 0) {
1321 /* must be readonly */
1324 if (dsl_prop_get_integer(dsname
,
1325 zfs_prop_to_name(ZFS_PROP_READONLY
), &rdonly
, NULL
))
1327 return (rdonly
? 0 : EACCES
);
1331 #endif /* HAVE_MLSLABEL */
1334 * zfs_mount_label_policy:
1335 * Determine whether the mount is allowed according to MAC check.
1336 * by comparing (where appropriate) label of the dataset against
1337 * the label of the zone being mounted into. If the dataset has
1338 * no label, create one.
1341 * 0 : access allowed
1342 * >0 : error code, such as EACCES
1345 zfs_mount_label_policy(vfs_t
*vfsp
, char *osname
)
1348 zone_t
*mntzone
= NULL
;
1349 ts_label_t
*mnt_tsl
;
1352 char ds_hexsl
[MAXNAMELEN
];
1354 retv
= EACCES
; /* assume the worst */
1357 * Start by getting the dataset label if it exists.
1359 error
= dsl_prop_get(osname
, zfs_prop_to_name(ZFS_PROP_MLSLABEL
),
1360 1, sizeof (ds_hexsl
), &ds_hexsl
, NULL
);
1365 * If labeling is NOT enabled, then disallow the mount of datasets
1366 * which have a non-default label already. No other label checks
1369 if (!is_system_labeled()) {
1370 if (strcasecmp(ds_hexsl
, ZFS_MLSLABEL_DEFAULT
) == 0)
1376 * Get the label of the mountpoint. If mounting into the global
1377 * zone (i.e. mountpoint is not within an active zone and the
1378 * zoned property is off), the label must be default or
1379 * admin_low/admin_high only; no other checks are needed.
1381 mntzone
= zone_find_by_any_path(refstr_value(vfsp
->vfs_mntpt
), B_FALSE
);
1382 if (mntzone
->zone_id
== GLOBAL_ZONEID
) {
1387 if (dsl_prop_get_integer(osname
,
1388 zfs_prop_to_name(ZFS_PROP_ZONED
), &zoned
, NULL
))
1391 return (zfs_check_global_label(osname
, ds_hexsl
));
1394 * This is the case of a zone dataset being mounted
1395 * initially, before the zone has been fully created;
1396 * allow this mount into global zone.
1401 mnt_tsl
= mntzone
->zone_slabel
;
1402 ASSERT(mnt_tsl
!= NULL
);
1403 label_hold(mnt_tsl
);
1404 mnt_sl
= label2bslabel(mnt_tsl
);
1406 if (strcasecmp(ds_hexsl
, ZFS_MLSLABEL_DEFAULT
) == 0) {
1408 * The dataset doesn't have a real label, so fabricate one.
1412 if (l_to_str_internal(mnt_sl
, &str
) == 0 &&
1413 dsl_prop_set(osname
, zfs_prop_to_name(ZFS_PROP_MLSLABEL
),
1414 ZPROP_SRC_LOCAL
, 1, strlen(str
) + 1, str
) == 0)
1417 kmem_free(str
, strlen(str
) + 1);
1418 } else if (hexstr_to_label(ds_hexsl
, &ds_sl
) == 0) {
1420 * Now compare labels to complete the MAC check. If the
1421 * labels are equal then allow access. If the mountpoint
1422 * label dominates the dataset label, allow readonly access.
1423 * Otherwise, access is denied.
1425 if (blequal(mnt_sl
, &ds_sl
))
1427 else if (bldominates(mnt_sl
, &ds_sl
)) {
1428 vfs_setmntopt(vfsp
, MNTOPT_RO
, NULL
, 0);
1433 label_rele(mnt_tsl
);
1439 zfs_mountroot(vfs_t
*vfsp
, enum whymountroot why
)
1442 static int zfsrootdone
= 0;
1443 zfsvfs_t
*zfsvfs
= NULL
;
1452 * The filesystem that we mount as root is defined in the
1453 * boot property "zfs-bootfs" with a format of
1454 * "poolname/root-dataset-objnum".
1456 if (why
== ROOT_INIT
) {
1460 * the process of doing a spa_load will require the
1461 * clock to be set before we could (for example) do
1462 * something better by looking at the timestamp on
1463 * an uberblock, so just set it to -1.
1467 if ((zfs_bootfs
= spa_get_bootprop("zfs-bootfs")) == NULL
) {
1468 cmn_err(CE_NOTE
, "spa_get_bootfs: can not get "
1472 zfs_devid
= spa_get_bootprop("diskdevid");
1473 error
= spa_import_rootpool(rootfs
.bo_name
, zfs_devid
);
1475 spa_free_bootprop(zfs_devid
);
1477 spa_free_bootprop(zfs_bootfs
);
1478 cmn_err(CE_NOTE
, "spa_import_rootpool: error %d",
1482 if (error
= zfs_parse_bootfs(zfs_bootfs
, rootfs
.bo_name
)) {
1483 spa_free_bootprop(zfs_bootfs
);
1484 cmn_err(CE_NOTE
, "zfs_parse_bootfs: error %d",
1489 spa_free_bootprop(zfs_bootfs
);
1491 if (error
= vfs_lock(vfsp
))
1494 if (error
= zfs_domount(vfsp
, rootfs
.bo_name
)) {
1495 cmn_err(CE_NOTE
, "zfs_domount: error %d", error
);
1499 zfsvfs
= (zfsvfs_t
*)vfsp
->vfs_data
;
1501 if (error
= zfs_zget(zfsvfs
, zfsvfs
->z_root
, &zp
)) {
1502 cmn_err(CE_NOTE
, "zfs_zget: error %d", error
);
1507 mutex_enter(&vp
->v_lock
);
1508 vp
->v_flag
|= VROOT
;
1509 mutex_exit(&vp
->v_lock
);
1513 * Leave rootvp held. The root file system is never unmounted.
1516 vfs_add((struct vnode
*)0, vfsp
,
1517 (vfsp
->vfs_flag
& VFS_RDONLY
) ? MS_RDONLY
: 0);
1521 } else if (why
== ROOT_REMOUNT
) {
1522 readonly_changed_cb(vfsp
->vfs_data
, B_FALSE
);
1523 vfsp
->vfs_flag
|= VFS_REMOUNT
;
1525 /* refresh mount options */
1526 zfs_unregister_callbacks(vfsp
->vfs_data
);
1527 return (zfs_register_callbacks(vfsp
));
1529 } else if (why
== ROOT_UNMOUNT
) {
1530 zfs_unregister_callbacks((zfsvfs_t
*)vfsp
->vfs_data
);
1531 (void) zfs_sync(vfsp
, 0, 0);
1536 * if "why" is equal to anything else other than ROOT_INIT,
1537 * ROOT_REMOUNT, or ROOT_UNMOUNT, we do not support it.
1544 zfs_mount(vfs_t
*vfsp
, vnode_t
*mvp
, struct mounta
*uap
, cred_t
*cr
)
1549 uio_seg_t fromspace
= (uap
->flags
& MS_SYSSPACE
) ?
1550 UIO_SYSSPACE
: UIO_USERSPACE
;
1553 if (mvp
->v_type
!= VDIR
)
1556 mutex_enter(&mvp
->v_lock
);
1557 if ((uap
->flags
& MS_REMOUNT
) == 0 &&
1558 (uap
->flags
& MS_OVERLAY
) == 0 &&
1559 (mvp
->v_count
!= 1 || (mvp
->v_flag
& VROOT
))) {
1560 mutex_exit(&mvp
->v_lock
);
1563 mutex_exit(&mvp
->v_lock
);
1566 * ZFS does not support passing unparsed data in via MS_DATA.
1567 * Users should use the MS_OPTIONSTR interface; this means
1568 * that all option parsing is already done and the options struct
1569 * can be interrogated.
1571 if ((uap
->flags
& MS_DATA
) && uap
->datalen
> 0)
1575 * Get the objset name (the "special" mount argument).
1577 if ((error
= pn_get(uap
->spec
, fromspace
, &spn
)))
1580 osname
= spn
.pn_path
;
1583 * Check for mount privilege?
1585 * If we don't have privilege then see if
1586 * we have local permission to allow it
1588 error
= secpolicy_fs_mount(cr
, mvp
, vfsp
);
1590 if (dsl_deleg_access(osname
, ZFS_DELEG_PERM_MOUNT
, cr
) == 0) {
1594 * Make sure user is the owner of the mount point
1595 * or has sufficient privileges.
1598 vattr
.va_mask
= AT_UID
;
1600 if (VOP_GETATTR(mvp
, &vattr
, 0, cr
, NULL
)) {
1604 if (secpolicy_vnode_owner(cr
, vattr
.va_uid
) != 0 &&
1605 VOP_ACCESS(mvp
, VWRITE
, 0, cr
, NULL
) != 0) {
1608 secpolicy_fs_mount_clearopts(cr
, vfsp
);
1615 * Refuse to mount a filesystem if we are in a local zone and the
1616 * dataset is not visible.
1618 if (!INGLOBALZONE(curproc
) &&
1619 (!zone_dataset_visible(osname
, &canwrite
) || !canwrite
)) {
1624 error
= zfs_mount_label_policy(vfsp
, osname
);
1629 * When doing a remount, we simply refresh our temporary properties
1630 * according to those options set in the current VFS options.
1632 if (uap
->flags
& MS_REMOUNT
) {
1633 /* refresh mount options */
1634 zfs_unregister_callbacks(vfsp
->vfs_data
);
1635 error
= zfs_register_callbacks(vfsp
);
1639 error
= zfs_domount(vfsp
, osname
);
1642 * Add an extra VFS_HOLD on our parent vfs so that it can't
1643 * disappear due to a forced unmount.
1645 if (error
== 0 && ((zfsvfs_t
*)vfsp
->vfs_data
)->z_issnap
)
1646 VFS_HOLD(mvp
->v_vfsp
);
1654 zfs_statvfs(vfs_t
*vfsp
, struct statvfs64
*statp
)
1656 zfsvfs_t
*zfsvfs
= vfsp
->vfs_data
;
1658 uint64_t refdbytes
, availbytes
, usedobjs
, availobjs
;
1662 dmu_objset_space(zfsvfs
->z_os
,
1663 &refdbytes
, &availbytes
, &usedobjs
, &availobjs
);
1666 * The underlying storage pool actually uses multiple block sizes.
1667 * We report the fragsize as the smallest block size we support,
1668 * and we report our blocksize as the filesystem's maximum blocksize.
1670 statp
->f_frsize
= 1UL << SPA_MINBLOCKSHIFT
;
1671 statp
->f_bsize
= zfsvfs
->z_max_blksz
;
1674 * The following report "total" blocks of various kinds in the
1675 * file system, but reported in terms of f_frsize - the
1679 statp
->f_blocks
= (refdbytes
+ availbytes
) >> SPA_MINBLOCKSHIFT
;
1680 statp
->f_bfree
= availbytes
>> SPA_MINBLOCKSHIFT
;
1681 statp
->f_bavail
= statp
->f_bfree
; /* no root reservation */
1684 * statvfs() should really be called statufs(), because it assumes
1685 * static metadata. ZFS doesn't preallocate files, so the best
1686 * we can do is report the max that could possibly fit in f_files,
1687 * and that minus the number actually used in f_ffree.
1688 * For f_ffree, report the smaller of the number of object available
1689 * and the number of blocks (each object will take at least a block).
1691 statp
->f_ffree
= MIN(availobjs
, statp
->f_bfree
);
1692 statp
->f_favail
= statp
->f_ffree
; /* no "root reservation" */
1693 statp
->f_files
= statp
->f_ffree
+ usedobjs
;
1695 (void) cmpldev(&d32
, vfsp
->vfs_dev
);
1696 statp
->f_fsid
= d32
;
1699 * We're a zfs filesystem.
1701 (void) strcpy(statp
->f_basetype
, vfssw
[vfsp
->vfs_fstype
].vsw_name
);
1703 statp
->f_flag
= vf_to_stf(vfsp
->vfs_flag
);
1705 statp
->f_namemax
= ZFS_MAXNAMELEN
;
1708 * We have all of 32 characters to stuff a string here.
1709 * Is there anything useful we could/should provide?
1711 bzero(statp
->f_fstr
, sizeof (statp
->f_fstr
));
1716 EXPORT_SYMBOL(zfs_statvfs
);
1719 zfs_root(vfs_t
*vfsp
, vnode_t
**vpp
)
1721 zfsvfs_t
*zfsvfs
= vfsp
->vfs_data
;
1727 error
= zfs_zget(zfsvfs
, zfsvfs
->z_root
, &rootzp
);
1729 *vpp
= ZTOV(rootzp
);
1734 EXPORT_SYMBOL(zfs_root
);
1737 * Teardown the zfsvfs::z_os.
1739 * Note, if 'unmounting' if FALSE, we return with the 'z_teardown_lock'
1740 * and 'z_teardown_inactive_lock' held.
1743 zfsvfs_teardown(zfsvfs_t
*zfsvfs
, boolean_t unmounting
)
1747 rrw_enter(&zfsvfs
->z_teardown_lock
, RW_WRITER
, FTAG
);
1751 * We purge the parent filesystem's vfsp as the parent
1752 * filesystem and all of its snapshots have their vnode's
1753 * v_vfsp set to the parent's filesystem's vfsp. Note,
1754 * 'z_parent' is self referential for non-snapshots.
1756 (void) dnlc_purge_vfsp(zfsvfs
->z_parent
->z_vfs
, 0);
1760 * Close the zil. NB: Can't close the zil while zfs_inactive
1761 * threads are blocked as zil_close can call zfs_inactive.
1763 if (zfsvfs
->z_log
) {
1764 zil_close(zfsvfs
->z_log
);
1765 zfsvfs
->z_log
= NULL
;
1768 rw_enter(&zfsvfs
->z_teardown_inactive_lock
, RW_WRITER
);
1771 * If we are not unmounting (ie: online recv) and someone already
1772 * unmounted this file system while we were doing the switcheroo,
1773 * or a reopen of z_os failed then just bail out now.
1775 if (!unmounting
&& (zfsvfs
->z_unmounted
|| zfsvfs
->z_os
== NULL
)) {
1776 rw_exit(&zfsvfs
->z_teardown_inactive_lock
);
1777 rrw_exit(&zfsvfs
->z_teardown_lock
, FTAG
);
1782 * At this point there are no vops active, and any new vops will
1783 * fail with EIO since we have z_teardown_lock for writer (only
1784 * relavent for forced unmount).
1786 * Release all holds on dbufs.
1788 mutex_enter(&zfsvfs
->z_znodes_lock
);
1789 for (zp
= list_head(&zfsvfs
->z_all_znodes
); zp
!= NULL
;
1790 zp
= list_next(&zfsvfs
->z_all_znodes
, zp
))
1792 ASSERT(ZTOV(zp
)->v_count
> 0);
1793 zfs_znode_dmu_fini(zp
);
1795 mutex_exit(&zfsvfs
->z_znodes_lock
);
1798 * If we are unmounting, set the unmounted flag and let new vops
1799 * unblock. zfs_inactive will have the unmounted behavior, and all
1800 * other vops will fail with EIO.
1803 zfsvfs
->z_unmounted
= B_TRUE
;
1804 rrw_exit(&zfsvfs
->z_teardown_lock
, FTAG
);
1805 rw_exit(&zfsvfs
->z_teardown_inactive_lock
);
1809 * z_os will be NULL if there was an error in attempting to reopen
1810 * zfsvfs, so just return as the properties had already been
1811 * unregistered and cached data had been evicted before.
1813 if (zfsvfs
->z_os
== NULL
)
1817 * Unregister properties.
1819 zfs_unregister_callbacks(zfsvfs
);
1824 if (dmu_objset_is_dirty_anywhere(zfsvfs
->z_os
))
1825 if (!(zfsvfs
->z_vfs
->vfs_flag
& VFS_RDONLY
))
1826 txg_wait_synced(dmu_objset_pool(zfsvfs
->z_os
), 0);
1827 (void) dmu_objset_evict_dbufs(zfsvfs
->z_os
);
1834 zfs_umount(vfs_t
*vfsp
, int fflag
, cred_t
*cr
)
1836 zfsvfs_t
*zfsvfs
= vfsp
->vfs_data
;
1840 ret
= secpolicy_fs_unmount(cr
, vfsp
);
1842 if (dsl_deleg_access((char *)refstr_value(vfsp
->vfs_resource
),
1843 ZFS_DELEG_PERM_MOUNT
, cr
))
1848 * We purge the parent filesystem's vfsp as the parent filesystem
1849 * and all of its snapshots have their vnode's v_vfsp set to the
1850 * parent's filesystem's vfsp. Note, 'z_parent' is self
1851 * referential for non-snapshots.
1853 (void) dnlc_purge_vfsp(zfsvfs
->z_parent
->z_vfs
, 0);
1856 * Unmount any snapshots mounted under .zfs before unmounting the
1859 if (zfsvfs
->z_ctldir
!= NULL
&&
1860 (ret
= zfsctl_umount_snapshots(vfsp
, fflag
, cr
)) != 0) {
1864 if (!(fflag
& MS_FORCE
)) {
1866 * Check the number of active vnodes in the file system.
1867 * Our count is maintained in the vfs structure, but the
1868 * number is off by 1 to indicate a hold on the vfs
1871 * The '.zfs' directory maintains a reference of its
1872 * own, and any active references underneath are
1873 * reflected in the vnode count.
1875 if (zfsvfs
->z_ctldir
== NULL
) {
1876 if (vfsp
->vfs_count
> 1)
1879 if (vfsp
->vfs_count
> 2 ||
1880 zfsvfs
->z_ctldir
->v_count
> 1)
1885 vfsp
->vfs_flag
|= VFS_UNMOUNTED
;
1887 VERIFY(zfsvfs_teardown(zfsvfs
, B_TRUE
) == 0);
1891 * z_os will be NULL if there was an error in
1892 * attempting to reopen zfsvfs.
1896 * Unset the objset user_ptr.
1898 mutex_enter(&os
->os_user_ptr_lock
);
1899 dmu_objset_set_user(os
, NULL
);
1900 mutex_exit(&os
->os_user_ptr_lock
);
1903 * Finally release the objset
1905 dmu_objset_disown(os
, zfsvfs
);
1909 * We can now safely destroy the '.zfs' directory node.
1911 if (zfsvfs
->z_ctldir
!= NULL
)
1912 zfsctl_destroy(zfsvfs
);
1916 EXPORT_SYMBOL(zfs_umount
);
1919 zfs_vget(vfs_t
*vfsp
, vnode_t
**vpp
, fid_t
*fidp
)
1921 zfsvfs_t
*zfsvfs
= vfsp
->vfs_data
;
1923 uint64_t object
= 0;
1924 uint64_t fid_gen
= 0;
1933 if (fidp
->fid_len
== LONG_FID_LEN
) {
1934 zfid_long_t
*zlfid
= (zfid_long_t
*)fidp
;
1935 uint64_t objsetid
= 0;
1936 uint64_t setgen
= 0;
1938 for (i
= 0; i
< sizeof (zlfid
->zf_setid
); i
++)
1939 objsetid
|= ((uint64_t)zlfid
->zf_setid
[i
]) << (8 * i
);
1941 for (i
= 0; i
< sizeof (zlfid
->zf_setgen
); i
++)
1942 setgen
|= ((uint64_t)zlfid
->zf_setgen
[i
]) << (8 * i
);
1946 err
= zfsctl_lookup_objset(vfsp
, objsetid
, &zfsvfs
);
1952 if (fidp
->fid_len
== SHORT_FID_LEN
|| fidp
->fid_len
== LONG_FID_LEN
) {
1953 zfid_short_t
*zfid
= (zfid_short_t
*)fidp
;
1955 for (i
= 0; i
< sizeof (zfid
->zf_object
); i
++)
1956 object
|= ((uint64_t)zfid
->zf_object
[i
]) << (8 * i
);
1958 for (i
= 0; i
< sizeof (zfid
->zf_gen
); i
++)
1959 fid_gen
|= ((uint64_t)zfid
->zf_gen
[i
]) << (8 * i
);
1965 /* A zero fid_gen means we are in the .zfs control directories */
1967 (object
== ZFSCTL_INO_ROOT
|| object
== ZFSCTL_INO_SNAPDIR
)) {
1968 *vpp
= zfsvfs
->z_ctldir
;
1969 ASSERT(*vpp
!= NULL
);
1970 if (object
== ZFSCTL_INO_SNAPDIR
) {
1971 VERIFY(zfsctl_root_lookup(*vpp
, "snapshot", vpp
, NULL
,
1972 0, NULL
, NULL
, NULL
, NULL
, NULL
) == 0);
1980 gen_mask
= -1ULL >> (64 - 8 * i
);
1982 dprintf("getting %llu [%u mask %llx]\n", object
, fid_gen
, gen_mask
);
1983 if ((err
= zfs_zget(zfsvfs
, object
, &zp
))) {
1987 (void) sa_lookup(zp
->z_sa_hdl
, SA_ZPL_GEN(zfsvfs
), &zp_gen
,
1989 zp_gen
= zp_gen
& gen_mask
;
1992 if (zp
->z_unlinked
|| zp_gen
!= fid_gen
) {
1993 dprintf("znode gen (%u) != fid gen (%u)\n", zp_gen
, fid_gen
);
2003 EXPORT_SYMBOL(zfs_vget
);
2006 * Block out VOPs and close zfsvfs_t::z_os
2008 * Note, if successful, then we return with the 'z_teardown_lock' and
2009 * 'z_teardown_inactive_lock' write held.
2012 zfs_suspend_fs(zfsvfs_t
*zfsvfs
)
2016 if ((error
= zfsvfs_teardown(zfsvfs
, B_FALSE
)) != 0)
2018 dmu_objset_disown(zfsvfs
->z_os
, zfsvfs
);
2022 EXPORT_SYMBOL(zfs_suspend_fs
);
2025 * Reopen zfsvfs_t::z_os and release VOPs.
2028 zfs_resume_fs(zfsvfs_t
*zfsvfs
, const char *osname
)
2032 ASSERT(RRW_WRITE_HELD(&zfsvfs
->z_teardown_lock
));
2033 ASSERT(RW_WRITE_HELD(&zfsvfs
->z_teardown_inactive_lock
));
2035 err
= dmu_objset_own(osname
, DMU_OST_ZFS
, B_FALSE
, zfsvfs
,
2038 zfsvfs
->z_os
= NULL
;
2041 uint64_t sa_obj
= 0;
2043 err2
= zap_lookup(zfsvfs
->z_os
, MASTER_NODE_OBJ
,
2044 ZFS_SA_ATTRS
, 8, 1, &sa_obj
);
2046 if ((err
|| err2
) && zfsvfs
->z_version
>= ZPL_VERSION_SA
)
2050 if ((err
= sa_setup(zfsvfs
->z_os
, sa_obj
,
2051 zfs_attr_table
, ZPL_END
, &zfsvfs
->z_attr_table
)) != 0)
2054 VERIFY(zfsvfs_setup(zfsvfs
, B_FALSE
) == 0);
2057 * Attempt to re-establish all the active znodes with
2058 * their dbufs. If a zfs_rezget() fails, then we'll let
2059 * any potential callers discover that via ZFS_ENTER_VERIFY_VP
2060 * when they try to use their znode.
2062 mutex_enter(&zfsvfs
->z_znodes_lock
);
2063 for (zp
= list_head(&zfsvfs
->z_all_znodes
); zp
;
2064 zp
= list_next(&zfsvfs
->z_all_znodes
, zp
)) {
2065 (void) zfs_rezget(zp
);
2067 mutex_exit(&zfsvfs
->z_znodes_lock
);
2072 /* release the VOPs */
2073 rw_exit(&zfsvfs
->z_teardown_inactive_lock
);
2074 rrw_exit(&zfsvfs
->z_teardown_lock
, FTAG
);
2078 * Since we couldn't reopen zfsvfs::z_os, force
2079 * unmount this file system.
2081 if (vn_vfswlock(zfsvfs
->z_vfs
->vfs_vnodecovered
) == 0)
2082 (void) dounmount(zfsvfs
->z_vfs
, MS_FORCE
, CRED());
2086 EXPORT_SYMBOL(zfs_resume_fs
);
2089 zfs_freevfs(vfs_t
*vfsp
)
2091 zfsvfs_t
*zfsvfs
= vfsp
->vfs_data
;
2094 * If this is a snapshot, we have an extra VFS_HOLD on our parent
2095 * from zfs_mount(). Release it here. If we came through
2096 * zfs_mountroot() instead, we didn't grab an extra hold, so
2097 * skip the VFS_RELE for rootvfs.
2099 if (zfsvfs
->z_issnap
&& (vfsp
!= rootvfs
))
2100 VFS_RELE(zfsvfs
->z_parent
->z_vfs
);
2102 zfsvfs_free(zfsvfs
);
2104 atomic_add_32(&zfs_active_fs_count
, -1);
2108 * VFS_INIT() initialization. Note that there is no VFS_FINI(),
2109 * so we can't safely do any non-idempotent initialization here.
2110 * Leave that to zfs_init() and zfs_fini(), which are called
2111 * from the module's _init() and _fini() entry points.
2115 zfs_vfsinit(int fstype
, char *name
)
2122 * Setup vfsops and vnodeops tables.
2124 error
= vfs_setfsops(fstype
, zfs_vfsops_template
, &zfs_vfsops
);
2126 cmn_err(CE_WARN
, "zfs: bad vfs ops template");
2129 error
= zfs_create_op_tables();
2131 zfs_remove_op_tables();
2132 cmn_err(CE_WARN
, "zfs: bad vnode ops template");
2133 (void) vfs_freevfsops_by_type(zfsfstype
);
2137 mutex_init(&zfs_dev_mtx
, NULL
, MUTEX_DEFAULT
, NULL
);
2140 * Unique major number for all zfs mounts.
2141 * If we run out of 32-bit minors, we'll getudev() another major.
2143 zfs_major
= ddi_name_to_major(ZFS_DRIVER
);
2144 zfs_minor
= ZFS_MIN_MINOR
;
2148 #endif /* HAVE_ZPL */
2155 * Initialize .zfs directory structures
2160 * Initialize znode cache, vnode ops, etc...
2163 #endif /* HAVE_ZPL */
2165 dmu_objset_register_type(DMU_OST_ZFS
, zfs_space_delta_cb
);
2174 #endif /* HAVE_ZPL */
2179 zfs_set_version(zfsvfs_t
*zfsvfs
, uint64_t newvers
)
2182 objset_t
*os
= zfsvfs
->z_os
;
2185 if (newvers
< ZPL_VERSION_INITIAL
|| newvers
> ZPL_VERSION
)
2188 if (newvers
< zfsvfs
->z_version
)
2191 if (zfs_spa_version_map(newvers
) >
2192 spa_version(dmu_objset_spa(zfsvfs
->z_os
)))
2195 tx
= dmu_tx_create(os
);
2196 dmu_tx_hold_zap(tx
, MASTER_NODE_OBJ
, B_FALSE
, ZPL_VERSION_STR
);
2197 if (newvers
>= ZPL_VERSION_SA
&& !zfsvfs
->z_use_sa
) {
2198 dmu_tx_hold_zap(tx
, MASTER_NODE_OBJ
, B_TRUE
,
2200 dmu_tx_hold_zap(tx
, DMU_NEW_OBJECT
, FALSE
, NULL
);
2202 error
= dmu_tx_assign(tx
, TXG_WAIT
);
2208 error
= zap_update(os
, MASTER_NODE_OBJ
, ZPL_VERSION_STR
,
2209 8, 1, &newvers
, tx
);
2216 if (newvers
>= ZPL_VERSION_SA
&& !zfsvfs
->z_use_sa
) {
2219 ASSERT3U(spa_version(dmu_objset_spa(zfsvfs
->z_os
)), >=,
2221 sa_obj
= zap_create(os
, DMU_OT_SA_MASTER_NODE
,
2222 DMU_OT_NONE
, 0, tx
);
2224 error
= zap_add(os
, MASTER_NODE_OBJ
,
2225 ZFS_SA_ATTRS
, 8, 1, &sa_obj
, tx
);
2226 ASSERT3U(error
, ==, 0);
2228 VERIFY(0 == sa_set_sa_object(os
, sa_obj
));
2229 sa_register_update_callback(os
, zfs_sa_upgrade
);
2232 spa_history_log_internal(LOG_DS_UPGRADE
,
2233 dmu_objset_spa(os
), tx
, "oldver=%llu newver=%llu dataset = %llu",
2234 zfsvfs
->z_version
, newvers
, dmu_objset_id(os
));
2238 zfsvfs
->z_version
= newvers
;
2240 if (zfsvfs
->z_version
>= ZPL_VERSION_FUID
)
2241 zfs_set_fuid_feature(zfsvfs
);
2245 EXPORT_SYMBOL(zfs_set_version
);
2246 #endif /* HAVE_ZPL */
2249 * Read a property stored within the master node.
2252 zfs_get_zplprop(objset_t
*os
, zfs_prop_t prop
, uint64_t *value
)
2258 * Look up the file system's value for the property. For the
2259 * version property, we look up a slightly different string.
2261 if (prop
== ZFS_PROP_VERSION
)
2262 pname
= ZPL_VERSION_STR
;
2264 pname
= zfs_prop_to_name(prop
);
2267 error
= zap_lookup(os
, MASTER_NODE_OBJ
, pname
, 8, 1, value
);
2269 if (error
== ENOENT
) {
2270 /* No value set, use the default value */
2272 case ZFS_PROP_VERSION
:
2273 *value
= ZPL_VERSION
;
2275 case ZFS_PROP_NORMALIZE
:
2276 case ZFS_PROP_UTF8ONLY
:
2280 *value
= ZFS_CASE_SENSITIVE
;
2291 static vfsdef_t vfw
= {
2295 VSW_HASPROTO
|VSW_CANRWRO
|VSW_CANREMOUNT
|VSW_VOLATILEDEV
|VSW_STATS
|
2300 struct modlfs zfs_modlfs
= {
2301 &mod_fsops
, "ZFS filesystem version " SPA_VERSION_STRING
, &vfw
2303 #endif /* HAVE_ZPL */