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_umount(vfs_t
*vfsp
, int fflag
, cred_t
*cr
);
79 static int zfs_mountroot(vfs_t
*vfsp
, enum whymountroot
);
80 static int zfs_root(vfs_t
*vfsp
, vnode_t
**vpp
);
81 static int zfs_statvfs(vfs_t
*vfsp
, struct statvfs64
*statp
);
82 static int zfs_vget(vfs_t
*vfsp
, vnode_t
**vpp
, fid_t
*fidp
);
83 static void zfs_freevfs(vfs_t
*vfsp
);
85 static const fs_operation_def_t zfs_vfsops_template
[] = {
86 VFSNAME_MOUNT
, { .vfs_mount
= zfs_mount
},
87 VFSNAME_MOUNTROOT
, { .vfs_mountroot
= zfs_mountroot
},
88 VFSNAME_UNMOUNT
, { .vfs_unmount
= zfs_umount
},
89 VFSNAME_ROOT
, { .vfs_root
= zfs_root
},
90 VFSNAME_STATVFS
, { .vfs_statvfs
= zfs_statvfs
},
91 VFSNAME_SYNC
, { .vfs_sync
= zfs_sync
},
92 VFSNAME_VGET
, { .vfs_vget
= zfs_vget
},
93 VFSNAME_FREEVFS
, { .vfs_freevfs
= zfs_freevfs
},
97 static const fs_operation_def_t zfs_vfsops_eio_template
[] = {
98 VFSNAME_FREEVFS
, { .vfs_freevfs
= zfs_freevfs
},
103 * We need to keep a count of active fs's.
104 * This is necessary to prevent our module
105 * from being unloaded after a umount -f
107 static uint32_t zfs_active_fs_count
= 0;
109 static char *noatime_cancel
[] = { MNTOPT_ATIME
, NULL
};
110 static char *atime_cancel
[] = { MNTOPT_NOATIME
, NULL
};
111 static char *noxattr_cancel
[] = { MNTOPT_XATTR
, NULL
};
112 static char *xattr_cancel
[] = { MNTOPT_NOXATTR
, NULL
};
115 * MO_DEFAULT is not used since the default value is determined
116 * by the equivalent property.
118 static mntopt_t mntopts
[] = {
119 { MNTOPT_NOXATTR
, noxattr_cancel
, NULL
, 0, NULL
},
120 { MNTOPT_XATTR
, xattr_cancel
, NULL
, 0, NULL
},
121 { MNTOPT_NOATIME
, noatime_cancel
, NULL
, 0, NULL
},
122 { MNTOPT_ATIME
, atime_cancel
, NULL
, 0, NULL
}
125 static mntopts_t zfs_mntopts
= {
126 sizeof (mntopts
) / sizeof (mntopt_t
),
132 zfs_sync(vfs_t
*vfsp
, short flag
, cred_t
*cr
)
135 * Data integrity is job one. We don't want a compromised kernel
136 * writing to the storage pool, so we never sync during panic.
142 * SYNC_ATTR is used by fsflush() to force old filesystems like UFS
143 * to sync metadata, which they would otherwise cache indefinitely.
144 * Semantically, the only requirement is that the sync be initiated.
145 * The DMU syncs out txgs frequently, so there's nothing to do.
147 if (flag
& SYNC_ATTR
)
152 * Sync a specific filesystem.
154 zfsvfs_t
*zfsvfs
= vfsp
->vfs_data
;
158 dp
= dmu_objset_pool(zfsvfs
->z_os
);
161 * If the system is shutting down, then skip any
162 * filesystems which may exist on a suspended pool.
164 if (sys_shutdown
&& spa_suspended(dp
->dp_spa
)) {
169 if (zfsvfs
->z_log
!= NULL
)
170 zil_commit(zfsvfs
->z_log
, 0);
175 * Sync all ZFS filesystems. This is what happens when you
176 * run sync(1M). Unlike other filesystems, ZFS honors the
177 * request by waiting for all pools to commit all dirty data.
186 zfs_create_unique_device(dev_t
*dev
)
191 ASSERT3U(zfs_minor
, <=, MAXMIN32
);
192 minor_t start
= zfs_minor
;
194 mutex_enter(&zfs_dev_mtx
);
195 if (zfs_minor
>= MAXMIN32
) {
197 * If we're still using the real major
198 * keep out of /dev/zfs and /dev/zvol minor
199 * number space. If we're using a getudev()'ed
200 * major number, we can use all of its minors.
202 if (zfs_major
== ddi_name_to_major(ZFS_DRIVER
))
203 zfs_minor
= ZFS_MIN_MINOR
;
209 *dev
= makedevice(zfs_major
, zfs_minor
);
210 mutex_exit(&zfs_dev_mtx
);
211 } while (vfs_devismounted(*dev
) && zfs_minor
!= start
);
212 if (zfs_minor
== start
) {
214 * We are using all ~262,000 minor numbers for the
215 * current major number. Create a new major number.
217 if ((new_major
= getudev()) == (major_t
)-1) {
219 "zfs_mount: Can't get unique major "
223 mutex_enter(&zfs_dev_mtx
);
224 zfs_major
= new_major
;
227 mutex_exit(&zfs_dev_mtx
);
231 /* CONSTANTCONDITION */
238 atime_changed_cb(void *arg
, uint64_t newval
)
240 zfsvfs_t
*zfsvfs
= arg
;
242 if (newval
== TRUE
) {
243 zfsvfs
->z_atime
= TRUE
;
244 vfs_clearmntopt(zfsvfs
->z_vfs
, MNTOPT_NOATIME
);
245 vfs_setmntopt(zfsvfs
->z_vfs
, MNTOPT_ATIME
, NULL
, 0);
247 zfsvfs
->z_atime
= FALSE
;
248 vfs_clearmntopt(zfsvfs
->z_vfs
, MNTOPT_ATIME
);
249 vfs_setmntopt(zfsvfs
->z_vfs
, MNTOPT_NOATIME
, NULL
, 0);
254 xattr_changed_cb(void *arg
, uint64_t newval
)
256 zfsvfs_t
*zfsvfs
= arg
;
258 if (newval
== TRUE
) {
259 /* XXX locking on vfs_flag? */
260 zfsvfs
->z_vfs
->vfs_flag
|= VFS_XATTR
;
261 vfs_clearmntopt(zfsvfs
->z_vfs
, MNTOPT_NOXATTR
);
262 vfs_setmntopt(zfsvfs
->z_vfs
, MNTOPT_XATTR
, NULL
, 0);
264 /* XXX locking on vfs_flag? */
265 zfsvfs
->z_vfs
->vfs_flag
&= ~VFS_XATTR
;
266 vfs_clearmntopt(zfsvfs
->z_vfs
, MNTOPT_XATTR
);
267 vfs_setmntopt(zfsvfs
->z_vfs
, MNTOPT_NOXATTR
, NULL
, 0);
272 blksz_changed_cb(void *arg
, uint64_t newval
)
274 zfsvfs_t
*zfsvfs
= arg
;
276 if (newval
< SPA_MINBLOCKSIZE
||
277 newval
> SPA_MAXBLOCKSIZE
|| !ISP2(newval
))
278 newval
= SPA_MAXBLOCKSIZE
;
280 zfsvfs
->z_max_blksz
= newval
;
281 zfsvfs
->z_vfs
->vfs_bsize
= newval
;
285 readonly_changed_cb(void *arg
, uint64_t newval
)
287 zfsvfs_t
*zfsvfs
= arg
;
290 /* XXX locking on vfs_flag? */
291 zfsvfs
->z_vfs
->vfs_flag
|= VFS_RDONLY
;
292 vfs_clearmntopt(zfsvfs
->z_vfs
, MNTOPT_RW
);
293 vfs_setmntopt(zfsvfs
->z_vfs
, MNTOPT_RO
, NULL
, 0);
295 /* XXX locking on vfs_flag? */
296 zfsvfs
->z_vfs
->vfs_flag
&= ~VFS_RDONLY
;
297 vfs_clearmntopt(zfsvfs
->z_vfs
, MNTOPT_RO
);
298 vfs_setmntopt(zfsvfs
->z_vfs
, MNTOPT_RW
, NULL
, 0);
303 devices_changed_cb(void *arg
, uint64_t newval
)
305 zfsvfs_t
*zfsvfs
= arg
;
307 if (newval
== FALSE
) {
308 zfsvfs
->z_vfs
->vfs_flag
|= VFS_NODEVICES
;
309 vfs_clearmntopt(zfsvfs
->z_vfs
, MNTOPT_DEVICES
);
310 vfs_setmntopt(zfsvfs
->z_vfs
, MNTOPT_NODEVICES
, NULL
, 0);
312 zfsvfs
->z_vfs
->vfs_flag
&= ~VFS_NODEVICES
;
313 vfs_clearmntopt(zfsvfs
->z_vfs
, MNTOPT_NODEVICES
);
314 vfs_setmntopt(zfsvfs
->z_vfs
, MNTOPT_DEVICES
, NULL
, 0);
319 setuid_changed_cb(void *arg
, uint64_t newval
)
321 zfsvfs_t
*zfsvfs
= arg
;
323 if (newval
== FALSE
) {
324 zfsvfs
->z_vfs
->vfs_flag
|= VFS_NOSETUID
;
325 vfs_clearmntopt(zfsvfs
->z_vfs
, MNTOPT_SETUID
);
326 vfs_setmntopt(zfsvfs
->z_vfs
, MNTOPT_NOSETUID
, NULL
, 0);
328 zfsvfs
->z_vfs
->vfs_flag
&= ~VFS_NOSETUID
;
329 vfs_clearmntopt(zfsvfs
->z_vfs
, MNTOPT_NOSETUID
);
330 vfs_setmntopt(zfsvfs
->z_vfs
, MNTOPT_SETUID
, NULL
, 0);
335 exec_changed_cb(void *arg
, uint64_t newval
)
337 zfsvfs_t
*zfsvfs
= arg
;
339 if (newval
== FALSE
) {
340 zfsvfs
->z_vfs
->vfs_flag
|= VFS_NOEXEC
;
341 vfs_clearmntopt(zfsvfs
->z_vfs
, MNTOPT_EXEC
);
342 vfs_setmntopt(zfsvfs
->z_vfs
, MNTOPT_NOEXEC
, NULL
, 0);
344 zfsvfs
->z_vfs
->vfs_flag
&= ~VFS_NOEXEC
;
345 vfs_clearmntopt(zfsvfs
->z_vfs
, MNTOPT_NOEXEC
);
346 vfs_setmntopt(zfsvfs
->z_vfs
, MNTOPT_EXEC
, NULL
, 0);
351 * The nbmand mount option can be changed at mount time.
352 * We can't allow it to be toggled on live file systems or incorrect
353 * behavior may be seen from cifs clients
355 * This property isn't registered via dsl_prop_register(), but this callback
356 * will be called when a file system is first mounted
359 nbmand_changed_cb(void *arg
, uint64_t newval
)
361 zfsvfs_t
*zfsvfs
= arg
;
362 if (newval
== FALSE
) {
363 vfs_clearmntopt(zfsvfs
->z_vfs
, MNTOPT_NBMAND
);
364 vfs_setmntopt(zfsvfs
->z_vfs
, MNTOPT_NONBMAND
, NULL
, 0);
366 vfs_clearmntopt(zfsvfs
->z_vfs
, MNTOPT_NONBMAND
);
367 vfs_setmntopt(zfsvfs
->z_vfs
, MNTOPT_NBMAND
, NULL
, 0);
372 snapdir_changed_cb(void *arg
, uint64_t newval
)
374 zfsvfs_t
*zfsvfs
= arg
;
376 zfsvfs
->z_show_ctldir
= newval
;
380 vscan_changed_cb(void *arg
, uint64_t newval
)
382 zfsvfs_t
*zfsvfs
= arg
;
384 zfsvfs
->z_vscan
= newval
;
388 acl_inherit_changed_cb(void *arg
, uint64_t newval
)
390 zfsvfs_t
*zfsvfs
= arg
;
392 zfsvfs
->z_acl_inherit
= newval
;
396 zfs_register_callbacks(vfs_t
*vfsp
)
398 struct dsl_dataset
*ds
= NULL
;
400 zfsvfs_t
*zfsvfs
= NULL
;
402 int readonly
, do_readonly
= B_FALSE
;
403 int setuid
, do_setuid
= B_FALSE
;
404 int exec
, do_exec
= B_FALSE
;
405 int devices
, do_devices
= B_FALSE
;
406 int xattr
, do_xattr
= B_FALSE
;
407 int atime
, do_atime
= B_FALSE
;
411 zfsvfs
= vfsp
->vfs_data
;
416 * The act of registering our callbacks will destroy any mount
417 * options we may have. In order to enable temporary overrides
418 * of mount options, we stash away the current values and
419 * restore them after we register the callbacks.
421 if (vfs_optionisset(vfsp
, MNTOPT_RO
, NULL
) ||
422 !spa_writeable(dmu_objset_spa(os
))) {
424 do_readonly
= B_TRUE
;
425 } else if (vfs_optionisset(vfsp
, MNTOPT_RW
, NULL
)) {
427 do_readonly
= B_TRUE
;
429 if (vfs_optionisset(vfsp
, MNTOPT_NOSUID
, NULL
)) {
435 if (vfs_optionisset(vfsp
, MNTOPT_NODEVICES
, NULL
)) {
438 } else if (vfs_optionisset(vfsp
, MNTOPT_DEVICES
, NULL
)) {
443 if (vfs_optionisset(vfsp
, MNTOPT_NOSETUID
, NULL
)) {
446 } else if (vfs_optionisset(vfsp
, MNTOPT_SETUID
, NULL
)) {
451 if (vfs_optionisset(vfsp
, MNTOPT_NOEXEC
, NULL
)) {
454 } else if (vfs_optionisset(vfsp
, MNTOPT_EXEC
, NULL
)) {
458 if (vfs_optionisset(vfsp
, MNTOPT_NOXATTR
, NULL
)) {
461 } else if (vfs_optionisset(vfsp
, MNTOPT_XATTR
, NULL
)) {
465 if (vfs_optionisset(vfsp
, MNTOPT_NOATIME
, NULL
)) {
468 } else if (vfs_optionisset(vfsp
, MNTOPT_ATIME
, NULL
)) {
474 * nbmand is a special property. It can only be changed at
477 * This is weird, but it is documented to only be changeable
480 if (vfs_optionisset(vfsp
, MNTOPT_NONBMAND
, NULL
)) {
482 } else if (vfs_optionisset(vfsp
, MNTOPT_NBMAND
, NULL
)) {
485 char osname
[MAXNAMELEN
];
487 dmu_objset_name(os
, osname
);
488 if (error
= dsl_prop_get_integer(osname
, "nbmand", &nbmand
,
495 * Register property callbacks.
497 * It would probably be fine to just check for i/o error from
498 * the first prop_register(), but I guess I like to go
501 ds
= dmu_objset_ds(os
);
502 error
= dsl_prop_register(ds
, "atime", atime_changed_cb
, zfsvfs
);
503 error
= error
? error
: dsl_prop_register(ds
,
504 "xattr", xattr_changed_cb
, zfsvfs
);
505 error
= error
? error
: dsl_prop_register(ds
,
506 "recordsize", blksz_changed_cb
, zfsvfs
);
507 error
= error
? error
: dsl_prop_register(ds
,
508 "readonly", readonly_changed_cb
, zfsvfs
);
509 error
= error
? error
: dsl_prop_register(ds
,
510 "devices", devices_changed_cb
, zfsvfs
);
511 error
= error
? error
: dsl_prop_register(ds
,
512 "setuid", setuid_changed_cb
, zfsvfs
);
513 error
= error
? error
: dsl_prop_register(ds
,
514 "exec", exec_changed_cb
, zfsvfs
);
515 error
= error
? error
: dsl_prop_register(ds
,
516 "snapdir", snapdir_changed_cb
, zfsvfs
);
517 error
= error
? error
: dsl_prop_register(ds
,
518 "aclinherit", acl_inherit_changed_cb
, zfsvfs
);
519 error
= error
? error
: dsl_prop_register(ds
,
520 "vscan", vscan_changed_cb
, zfsvfs
);
525 * Invoke our callbacks to restore temporary mount options.
528 readonly_changed_cb(zfsvfs
, readonly
);
530 setuid_changed_cb(zfsvfs
, setuid
);
532 exec_changed_cb(zfsvfs
, exec
);
534 devices_changed_cb(zfsvfs
, devices
);
536 xattr_changed_cb(zfsvfs
, xattr
);
538 atime_changed_cb(zfsvfs
, atime
);
540 nbmand_changed_cb(zfsvfs
, nbmand
);
546 * We may attempt to unregister some callbacks that are not
547 * registered, but this is OK; it will simply return ENOMSG,
548 * which we will ignore.
550 (void) dsl_prop_unregister(ds
, "atime", atime_changed_cb
, zfsvfs
);
551 (void) dsl_prop_unregister(ds
, "xattr", xattr_changed_cb
, zfsvfs
);
552 (void) dsl_prop_unregister(ds
, "recordsize", blksz_changed_cb
, zfsvfs
);
553 (void) dsl_prop_unregister(ds
, "readonly", readonly_changed_cb
, zfsvfs
);
554 (void) dsl_prop_unregister(ds
, "devices", devices_changed_cb
, zfsvfs
);
555 (void) dsl_prop_unregister(ds
, "setuid", setuid_changed_cb
, zfsvfs
);
556 (void) dsl_prop_unregister(ds
, "exec", exec_changed_cb
, zfsvfs
);
557 (void) dsl_prop_unregister(ds
, "snapdir", snapdir_changed_cb
, zfsvfs
);
558 (void) dsl_prop_unregister(ds
, "aclinherit", acl_inherit_changed_cb
,
560 (void) dsl_prop_unregister(ds
, "vscan", vscan_changed_cb
, zfsvfs
);
566 zfs_space_delta_cb(dmu_object_type_t bonustype
, void *data
,
567 uint64_t *userp
, uint64_t *groupp
)
569 znode_phys_t
*znp
= data
;
573 * Is it a valid type of object to track?
575 if (bonustype
!= DMU_OT_ZNODE
&& bonustype
!= DMU_OT_SA
)
579 * If we have a NULL data pointer
580 * then assume the id's aren't changing and
581 * return EEXIST to the dmu to let it know to
587 if (bonustype
== DMU_OT_ZNODE
) {
588 *userp
= znp
->zp_uid
;
589 *groupp
= znp
->zp_gid
;
593 ASSERT(bonustype
== DMU_OT_SA
);
594 hdrsize
= sa_hdrsize(data
);
597 *userp
= *((uint64_t *)((uintptr_t)data
+ hdrsize
+
599 *groupp
= *((uint64_t *)((uintptr_t)data
+ hdrsize
+
603 * This should only happen for newly created
604 * 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
);
648 zfs_userspace_many(zfsvfs_t
*zfsvfs
, zfs_userquota_prop_t type
,
649 uint64_t *cookiep
, void *vbuf
, uint64_t *bufsizep
)
654 zfs_useracct_t
*buf
= vbuf
;
657 if (!dmu_objset_userspace_present(zfsvfs
->z_os
))
660 obj
= zfs_userquota_prop_to_obj(zfsvfs
, type
);
666 for (zap_cursor_init_serialized(&zc
, zfsvfs
->z_os
, obj
, *cookiep
);
667 (error
= zap_cursor_retrieve(&zc
, &za
)) == 0;
668 zap_cursor_advance(&zc
)) {
669 if ((uintptr_t)buf
- (uintptr_t)vbuf
+ sizeof (zfs_useracct_t
) >
673 fuidstr_to_sid(zfsvfs
, za
.za_name
,
674 buf
->zu_domain
, sizeof (buf
->zu_domain
), &buf
->zu_rid
);
676 buf
->zu_space
= za
.za_first_integer
;
682 ASSERT3U((uintptr_t)buf
- (uintptr_t)vbuf
, <=, *bufsizep
);
683 *bufsizep
= (uintptr_t)buf
- (uintptr_t)vbuf
;
684 *cookiep
= zap_cursor_serialize(&zc
);
685 zap_cursor_fini(&zc
);
690 * buf must be big enough (eg, 32 bytes)
693 id_to_fuidstr(zfsvfs_t
*zfsvfs
, const char *domain
, uid_t rid
,
694 char *buf
, boolean_t addok
)
699 if (domain
&& domain
[0]) {
700 domainid
= zfs_fuid_find_by_domain(zfsvfs
, domain
, NULL
, addok
);
704 fuid
= FUID_ENCODE(domainid
, rid
);
705 (void) sprintf(buf
, "%llx", (longlong_t
)fuid
);
710 zfs_userspace_one(zfsvfs_t
*zfsvfs
, zfs_userquota_prop_t type
,
711 const char *domain
, uint64_t rid
, uint64_t *valp
)
719 if (!dmu_objset_userspace_present(zfsvfs
->z_os
))
722 obj
= zfs_userquota_prop_to_obj(zfsvfs
, type
);
726 err
= id_to_fuidstr(zfsvfs
, domain
, rid
, buf
, B_FALSE
);
730 err
= zap_lookup(zfsvfs
->z_os
, obj
, buf
, 8, 1, valp
);
737 zfs_set_userquota(zfsvfs_t
*zfsvfs
, zfs_userquota_prop_t type
,
738 const char *domain
, uint64_t rid
, uint64_t quota
)
744 boolean_t fuid_dirtied
;
746 if (type
!= ZFS_PROP_USERQUOTA
&& type
!= ZFS_PROP_GROUPQUOTA
)
749 if (zfsvfs
->z_version
< ZPL_VERSION_USERSPACE
)
752 objp
= (type
== ZFS_PROP_USERQUOTA
) ? &zfsvfs
->z_userquota_obj
:
753 &zfsvfs
->z_groupquota_obj
;
755 err
= id_to_fuidstr(zfsvfs
, domain
, rid
, buf
, B_TRUE
);
758 fuid_dirtied
= zfsvfs
->z_fuid_dirty
;
760 tx
= dmu_tx_create(zfsvfs
->z_os
);
761 dmu_tx_hold_zap(tx
, *objp
? *objp
: DMU_NEW_OBJECT
, B_TRUE
, NULL
);
763 dmu_tx_hold_zap(tx
, MASTER_NODE_OBJ
, B_TRUE
,
764 zfs_userquota_prop_prefixes
[type
]);
767 zfs_fuid_txhold(zfsvfs
, tx
);
768 err
= dmu_tx_assign(tx
, TXG_WAIT
);
774 mutex_enter(&zfsvfs
->z_lock
);
776 *objp
= zap_create(zfsvfs
->z_os
, DMU_OT_USERGROUP_QUOTA
,
778 VERIFY(0 == zap_add(zfsvfs
->z_os
, MASTER_NODE_OBJ
,
779 zfs_userquota_prop_prefixes
[type
], 8, 1, objp
, tx
));
781 mutex_exit(&zfsvfs
->z_lock
);
784 err
= zap_remove(zfsvfs
->z_os
, *objp
, buf
, tx
);
788 err
= zap_update(zfsvfs
->z_os
, *objp
, buf
, 8, 1, "a
, tx
);
792 zfs_fuid_sync(zfsvfs
, tx
);
798 zfs_fuid_overquota(zfsvfs_t
*zfsvfs
, boolean_t isgroup
, uint64_t fuid
)
801 uint64_t used
, quota
, usedobj
, quotaobj
;
804 usedobj
= isgroup
? DMU_GROUPUSED_OBJECT
: DMU_USERUSED_OBJECT
;
805 quotaobj
= isgroup
? zfsvfs
->z_groupquota_obj
: zfsvfs
->z_userquota_obj
;
807 if (quotaobj
== 0 || zfsvfs
->z_replay
)
810 (void) sprintf(buf
, "%llx", (longlong_t
)fuid
);
811 err
= zap_lookup(zfsvfs
->z_os
, quotaobj
, buf
, 8, 1, "a
);
815 err
= zap_lookup(zfsvfs
->z_os
, usedobj
, buf
, 8, 1, &used
);
818 return (used
>= quota
);
822 zfs_owner_overquota(zfsvfs_t
*zfsvfs
, znode_t
*zp
, boolean_t isgroup
)
827 quotaobj
= isgroup
? zfsvfs
->z_groupquota_obj
: zfsvfs
->z_userquota_obj
;
829 fuid
= isgroup
? zp
->z_gid
: zp
->z_uid
;
831 if (quotaobj
== 0 || zfsvfs
->z_replay
)
834 return (zfs_fuid_overquota(zfsvfs
, isgroup
, fuid
));
838 zfsvfs_create(const char *osname
, zfsvfs_t
**zfvp
)
846 zfsvfs
= kmem_zalloc(sizeof (zfsvfs_t
), KM_SLEEP
);
849 * We claim to always be readonly so we can open snapshots;
850 * other ZPL code will prevent us from writing to snapshots.
852 error
= dmu_objset_own(osname
, DMU_OST_ZFS
, B_TRUE
, zfsvfs
, &os
);
854 kmem_free(zfsvfs
, sizeof (zfsvfs_t
));
859 * Initialize the zfs-specific filesystem structure.
860 * Should probably make this a kmem cache, shuffle fields,
861 * and just bzero up to z_hold_mtx[].
863 zfsvfs
->z_vfs
= NULL
;
864 zfsvfs
->z_parent
= zfsvfs
;
865 zfsvfs
->z_max_blksz
= SPA_MAXBLOCKSIZE
;
866 zfsvfs
->z_show_ctldir
= ZFS_SNAPDIR_VISIBLE
;
869 error
= zfs_get_zplprop(os
, ZFS_PROP_VERSION
, &zfsvfs
->z_version
);
872 } else if (zfsvfs
->z_version
>
873 zfs_zpl_version_map(spa_version(dmu_objset_spa(os
)))) {
874 (void) printf("Can't mount a version %lld file system "
875 "on a version %lld pool\n. Pool must be upgraded to mount "
876 "this file system.", (u_longlong_t
)zfsvfs
->z_version
,
877 (u_longlong_t
)spa_version(dmu_objset_spa(os
)));
881 if ((error
= zfs_get_zplprop(os
, ZFS_PROP_NORMALIZE
, &zval
)) != 0)
883 zfsvfs
->z_norm
= (int)zval
;
885 if ((error
= zfs_get_zplprop(os
, ZFS_PROP_UTF8ONLY
, &zval
)) != 0)
887 zfsvfs
->z_utf8
= (zval
!= 0);
889 if ((error
= zfs_get_zplprop(os
, ZFS_PROP_CASE
, &zval
)) != 0)
891 zfsvfs
->z_case
= (uint_t
)zval
;
894 * Fold case on file systems that are always or sometimes case
897 if (zfsvfs
->z_case
== ZFS_CASE_INSENSITIVE
||
898 zfsvfs
->z_case
== ZFS_CASE_MIXED
)
899 zfsvfs
->z_norm
|= U8_TEXTPREP_TOUPPER
;
901 zfsvfs
->z_use_fuids
= USE_FUIDS(zfsvfs
->z_version
, zfsvfs
->z_os
);
902 zfsvfs
->z_use_sa
= USE_SA(zfsvfs
->z_version
, zfsvfs
->z_os
);
904 if (zfsvfs
->z_use_sa
) {
905 /* should either have both of these objects or none */
906 error
= zap_lookup(os
, MASTER_NODE_OBJ
, ZFS_SA_ATTRS
, 8, 1,
912 * Pre SA versions file systems should never touch
913 * either the attribute registration or layout objects.
918 error
= sa_setup(os
, sa_obj
, zfs_attr_table
, ZPL_END
,
919 &zfsvfs
->z_attr_table
);
923 if (zfsvfs
->z_version
>= ZPL_VERSION_SA
)
924 sa_register_update_callback(os
, zfs_sa_upgrade
);
926 error
= zap_lookup(os
, MASTER_NODE_OBJ
, ZFS_ROOT_OBJ
, 8, 1,
930 ASSERT(zfsvfs
->z_root
!= 0);
932 error
= zap_lookup(os
, MASTER_NODE_OBJ
, ZFS_UNLINKED_SET
, 8, 1,
933 &zfsvfs
->z_unlinkedobj
);
937 error
= zap_lookup(os
, MASTER_NODE_OBJ
,
938 zfs_userquota_prop_prefixes
[ZFS_PROP_USERQUOTA
],
939 8, 1, &zfsvfs
->z_userquota_obj
);
940 if (error
&& error
!= ENOENT
)
943 error
= zap_lookup(os
, MASTER_NODE_OBJ
,
944 zfs_userquota_prop_prefixes
[ZFS_PROP_GROUPQUOTA
],
945 8, 1, &zfsvfs
->z_groupquota_obj
);
946 if (error
&& error
!= ENOENT
)
949 error
= zap_lookup(os
, MASTER_NODE_OBJ
, ZFS_FUID_TABLES
, 8, 1,
950 &zfsvfs
->z_fuid_obj
);
951 if (error
&& error
!= ENOENT
)
954 error
= zap_lookup(os
, MASTER_NODE_OBJ
, ZFS_SHARES_DIR
, 8, 1,
955 &zfsvfs
->z_shares_dir
);
956 if (error
&& error
!= ENOENT
)
959 mutex_init(&zfsvfs
->z_znodes_lock
, NULL
, MUTEX_DEFAULT
, NULL
);
960 mutex_init(&zfsvfs
->z_lock
, NULL
, MUTEX_DEFAULT
, NULL
);
961 list_create(&zfsvfs
->z_all_znodes
, sizeof (znode_t
),
962 offsetof(znode_t
, z_link_node
));
963 rrw_init(&zfsvfs
->z_teardown_lock
);
964 rw_init(&zfsvfs
->z_teardown_inactive_lock
, NULL
, RW_DEFAULT
, NULL
);
965 rw_init(&zfsvfs
->z_fuid_lock
, NULL
, RW_DEFAULT
, NULL
);
966 for (i
= 0; i
!= ZFS_OBJ_MTX_SZ
; i
++)
967 mutex_init(&zfsvfs
->z_hold_mtx
[i
], NULL
, MUTEX_DEFAULT
, NULL
);
973 dmu_objset_disown(os
, zfsvfs
);
975 kmem_free(zfsvfs
, sizeof (zfsvfs_t
));
980 zfsvfs_setup(zfsvfs_t
*zfsvfs
, boolean_t mounting
)
984 error
= zfs_register_callbacks(zfsvfs
->z_vfs
);
989 * Set the objset user_ptr to track its zfsvfs.
991 mutex_enter(&zfsvfs
->z_os
->os_user_ptr_lock
);
992 dmu_objset_set_user(zfsvfs
->z_os
, zfsvfs
);
993 mutex_exit(&zfsvfs
->z_os
->os_user_ptr_lock
);
995 zfsvfs
->z_log
= zil_open(zfsvfs
->z_os
, zfs_get_data
);
998 * If we are not mounting (ie: online recv), then we don't
999 * have to worry about replaying the log as we blocked all
1000 * operations out since we closed the ZIL.
1006 * During replay we remove the read only flag to
1007 * allow replays to succeed.
1009 readonly
= zfsvfs
->z_vfs
->vfs_flag
& VFS_RDONLY
;
1011 zfsvfs
->z_vfs
->vfs_flag
&= ~VFS_RDONLY
;
1013 zfs_unlinked_drain(zfsvfs
);
1016 * Parse and replay the intent log.
1018 * Because of ziltest, this must be done after
1019 * zfs_unlinked_drain(). (Further note: ziltest
1020 * doesn't use readonly mounts, where
1021 * zfs_unlinked_drain() isn't called.) This is because
1022 * ziltest causes spa_sync() to think it's committed,
1023 * but actually it is not, so the intent log contains
1024 * many txg's worth of changes.
1026 * In particular, if object N is in the unlinked set in
1027 * the last txg to actually sync, then it could be
1028 * actually freed in a later txg and then reallocated
1029 * in a yet later txg. This would write a "create
1030 * object N" record to the intent log. Normally, this
1031 * would be fine because the spa_sync() would have
1032 * written out the fact that object N is free, before
1033 * we could write the "create object N" intent log
1036 * But when we are in ziltest mode, we advance the "open
1037 * txg" without actually spa_sync()-ing the changes to
1038 * disk. So we would see that object N is still
1039 * allocated and in the unlinked set, and there is an
1040 * intent log record saying to allocate it.
1042 if (spa_writeable(dmu_objset_spa(zfsvfs
->z_os
))) {
1043 if (zil_replay_disable
) {
1044 zil_destroy(zfsvfs
->z_log
, B_FALSE
);
1046 zfsvfs
->z_replay
= B_TRUE
;
1047 zil_replay(zfsvfs
->z_os
, zfsvfs
,
1049 zfsvfs
->z_replay
= B_FALSE
;
1052 zfsvfs
->z_vfs
->vfs_flag
|= readonly
; /* restore readonly bit */
1059 zfsvfs_free(zfsvfs_t
*zfsvfs
)
1062 extern krwlock_t zfsvfs_lock
; /* in zfs_znode.c */
1065 * This is a barrier to prevent the filesystem from going away in
1066 * zfs_znode_move() until we can safely ensure that the filesystem is
1067 * not unmounted. We consider the filesystem valid before the barrier
1068 * and invalid after the barrier.
1070 rw_enter(&zfsvfs_lock
, RW_READER
);
1071 rw_exit(&zfsvfs_lock
);
1073 zfs_fuid_destroy(zfsvfs
);
1075 mutex_destroy(&zfsvfs
->z_znodes_lock
);
1076 mutex_destroy(&zfsvfs
->z_lock
);
1077 list_destroy(&zfsvfs
->z_all_znodes
);
1078 rrw_destroy(&zfsvfs
->z_teardown_lock
);
1079 rw_destroy(&zfsvfs
->z_teardown_inactive_lock
);
1080 rw_destroy(&zfsvfs
->z_fuid_lock
);
1081 for (i
= 0; i
!= ZFS_OBJ_MTX_SZ
; i
++)
1082 mutex_destroy(&zfsvfs
->z_hold_mtx
[i
]);
1083 kmem_free(zfsvfs
, sizeof (zfsvfs_t
));
1087 zfs_set_fuid_feature(zfsvfs_t
*zfsvfs
)
1089 zfsvfs
->z_use_fuids
= USE_FUIDS(zfsvfs
->z_version
, zfsvfs
->z_os
);
1090 if (zfsvfs
->z_use_fuids
&& zfsvfs
->z_vfs
) {
1091 vfs_set_feature(zfsvfs
->z_vfs
, VFSFT_XVATTR
);
1092 vfs_set_feature(zfsvfs
->z_vfs
, VFSFT_SYSATTR_VIEWS
);
1093 vfs_set_feature(zfsvfs
->z_vfs
, VFSFT_ACEMASKONACCESS
);
1094 vfs_set_feature(zfsvfs
->z_vfs
, VFSFT_ACLONCREATE
);
1095 vfs_set_feature(zfsvfs
->z_vfs
, VFSFT_ACCESS_FILTER
);
1096 vfs_set_feature(zfsvfs
->z_vfs
, VFSFT_REPARSE
);
1098 zfsvfs
->z_use_sa
= USE_SA(zfsvfs
->z_version
, zfsvfs
->z_os
);
1102 zfs_domount(vfs_t
*vfsp
, char *osname
)
1105 uint64_t recordsize
, fsid_guid
;
1112 error
= zfsvfs_create(osname
, &zfsvfs
);
1115 zfsvfs
->z_vfs
= vfsp
;
1117 /* Initialize the generic filesystem structure. */
1118 vfsp
->vfs_bcount
= 0;
1119 vfsp
->vfs_data
= NULL
;
1121 if (zfs_create_unique_device(&mount_dev
) == -1) {
1125 ASSERT(vfs_devismounted(mount_dev
) == 0);
1127 if (error
= dsl_prop_get_integer(osname
, "recordsize", &recordsize
,
1131 vfsp
->vfs_dev
= mount_dev
;
1132 vfsp
->vfs_fstype
= zfsfstype
;
1133 vfsp
->vfs_bsize
= recordsize
;
1134 vfsp
->vfs_flag
|= VFS_NOTRUNC
;
1135 vfsp
->vfs_data
= zfsvfs
;
1138 * The fsid is 64 bits, composed of an 8-bit fs type, which
1139 * separates our fsid from any other filesystem types, and a
1140 * 56-bit objset unique ID. The objset unique ID is unique to
1141 * all objsets open on this system, provided by unique_create().
1142 * The 8-bit fs type must be put in the low bits of fsid[1]
1143 * because that's where other Solaris filesystems put it.
1145 fsid_guid
= dmu_objset_fsid_guid(zfsvfs
->z_os
);
1146 ASSERT((fsid_guid
& ~((1ULL<<56)-1)) == 0);
1147 vfsp
->vfs_fsid
.val
[0] = fsid_guid
;
1148 vfsp
->vfs_fsid
.val
[1] = ((fsid_guid
>>32) << 8) |
1152 * Set features for file system.
1154 zfs_set_fuid_feature(zfsvfs
);
1155 if (zfsvfs
->z_case
== ZFS_CASE_INSENSITIVE
) {
1156 vfs_set_feature(vfsp
, VFSFT_DIRENTFLAGS
);
1157 vfs_set_feature(vfsp
, VFSFT_CASEINSENSITIVE
);
1158 vfs_set_feature(vfsp
, VFSFT_NOCASESENSITIVE
);
1159 } else if (zfsvfs
->z_case
== ZFS_CASE_MIXED
) {
1160 vfs_set_feature(vfsp
, VFSFT_DIRENTFLAGS
);
1161 vfs_set_feature(vfsp
, VFSFT_CASEINSENSITIVE
);
1163 vfs_set_feature(vfsp
, VFSFT_ZEROCOPY_SUPPORTED
);
1165 if (dmu_objset_is_snapshot(zfsvfs
->z_os
)) {
1168 atime_changed_cb(zfsvfs
, B_FALSE
);
1169 readonly_changed_cb(zfsvfs
, B_TRUE
);
1170 if (error
= dsl_prop_get_integer(osname
, "xattr", &pval
, NULL
))
1172 xattr_changed_cb(zfsvfs
, pval
);
1173 zfsvfs
->z_issnap
= B_TRUE
;
1174 zfsvfs
->z_os
->os_sync
= ZFS_SYNC_DISABLED
;
1176 mutex_enter(&zfsvfs
->z_os
->os_user_ptr_lock
);
1177 dmu_objset_set_user(zfsvfs
->z_os
, zfsvfs
);
1178 mutex_exit(&zfsvfs
->z_os
->os_user_ptr_lock
);
1180 error
= zfsvfs_setup(zfsvfs
, B_TRUE
);
1183 if (!zfsvfs
->z_issnap
)
1184 zfsctl_create(zfsvfs
);
1187 dmu_objset_disown(zfsvfs
->z_os
, zfsvfs
);
1188 zfsvfs_free(zfsvfs
);
1190 atomic_add_32(&zfs_active_fs_count
, 1);
1197 zfs_unregister_callbacks(zfsvfs_t
*zfsvfs
)
1199 objset_t
*os
= zfsvfs
->z_os
;
1200 struct dsl_dataset
*ds
;
1203 * Unregister properties.
1205 if (!dmu_objset_is_snapshot(os
)) {
1206 ds
= dmu_objset_ds(os
);
1207 VERIFY(dsl_prop_unregister(ds
, "atime", atime_changed_cb
,
1210 VERIFY(dsl_prop_unregister(ds
, "xattr", xattr_changed_cb
,
1213 VERIFY(dsl_prop_unregister(ds
, "recordsize", blksz_changed_cb
,
1216 VERIFY(dsl_prop_unregister(ds
, "readonly", readonly_changed_cb
,
1219 VERIFY(dsl_prop_unregister(ds
, "devices", devices_changed_cb
,
1222 VERIFY(dsl_prop_unregister(ds
, "setuid", setuid_changed_cb
,
1225 VERIFY(dsl_prop_unregister(ds
, "exec", exec_changed_cb
,
1228 VERIFY(dsl_prop_unregister(ds
, "snapdir", snapdir_changed_cb
,
1231 VERIFY(dsl_prop_unregister(ds
, "aclinherit",
1232 acl_inherit_changed_cb
, zfsvfs
) == 0);
1234 VERIFY(dsl_prop_unregister(ds
, "vscan",
1235 vscan_changed_cb
, zfsvfs
) == 0);
1240 * Convert a decimal digit string to a uint64_t integer.
1243 str_to_uint64(char *str
, uint64_t *objnum
)
1248 if (*str
< '0' || *str
> '9')
1251 num
= num
*10 + *str
++ - '0';
1259 * The boot path passed from the boot loader is in the form of
1260 * "rootpool-name/root-filesystem-object-number'. Convert this
1261 * string to a dataset name: "rootpool-name/root-filesystem-name".
1264 zfs_parse_bootfs(char *bpath
, char *outpath
)
1270 if (*bpath
== 0 || *bpath
== '/')
1273 (void) strcpy(outpath
, bpath
);
1275 slashp
= strchr(bpath
, '/');
1277 /* if no '/', just return the pool name */
1278 if (slashp
== NULL
) {
1282 /* if not a number, just return the root dataset name */
1283 if (str_to_uint64(slashp
+1, &objnum
)) {
1288 error
= dsl_dsobj_to_dsname(bpath
, objnum
, outpath
);
1295 * zfs_check_global_label:
1296 * Check that the hex label string is appropriate for the dataset
1297 * being mounted into the global_zone proper.
1299 * Return an error if the hex label string is not default or
1300 * admin_low/admin_high. For admin_low labels, the corresponding
1301 * dataset must be readonly.
1304 zfs_check_global_label(const char *dsname
, const char *hexsl
)
1306 if (strcasecmp(hexsl
, ZFS_MLSLABEL_DEFAULT
) == 0)
1308 if (strcasecmp(hexsl
, ADMIN_HIGH
) == 0)
1310 if (strcasecmp(hexsl
, ADMIN_LOW
) == 0) {
1311 /* must be readonly */
1314 if (dsl_prop_get_integer(dsname
,
1315 zfs_prop_to_name(ZFS_PROP_READONLY
), &rdonly
, NULL
))
1317 return (rdonly
? 0 : EACCES
);
1323 * zfs_mount_label_policy:
1324 * Determine whether the mount is allowed according to MAC check.
1325 * by comparing (where appropriate) label of the dataset against
1326 * the label of the zone being mounted into. If the dataset has
1327 * no label, create one.
1330 * 0 : access allowed
1331 * >0 : error code, such as EACCES
1334 zfs_mount_label_policy(vfs_t
*vfsp
, char *osname
)
1337 zone_t
*mntzone
= NULL
;
1338 ts_label_t
*mnt_tsl
;
1341 char ds_hexsl
[MAXNAMELEN
];
1343 retv
= EACCES
; /* assume the worst */
1346 * Start by getting the dataset label if it exists.
1348 error
= dsl_prop_get(osname
, zfs_prop_to_name(ZFS_PROP_MLSLABEL
),
1349 1, sizeof (ds_hexsl
), &ds_hexsl
, NULL
);
1354 * If labeling is NOT enabled, then disallow the mount of datasets
1355 * which have a non-default label already. No other label checks
1358 if (!is_system_labeled()) {
1359 if (strcasecmp(ds_hexsl
, ZFS_MLSLABEL_DEFAULT
) == 0)
1365 * Get the label of the mountpoint. If mounting into the global
1366 * zone (i.e. mountpoint is not within an active zone and the
1367 * zoned property is off), the label must be default or
1368 * admin_low/admin_high only; no other checks are needed.
1370 mntzone
= zone_find_by_any_path(refstr_value(vfsp
->vfs_mntpt
), B_FALSE
);
1371 if (mntzone
->zone_id
== GLOBAL_ZONEID
) {
1376 if (dsl_prop_get_integer(osname
,
1377 zfs_prop_to_name(ZFS_PROP_ZONED
), &zoned
, NULL
))
1380 return (zfs_check_global_label(osname
, ds_hexsl
));
1383 * This is the case of a zone dataset being mounted
1384 * initially, before the zone has been fully created;
1385 * allow this mount into global zone.
1390 mnt_tsl
= mntzone
->zone_slabel
;
1391 ASSERT(mnt_tsl
!= NULL
);
1392 label_hold(mnt_tsl
);
1393 mnt_sl
= label2bslabel(mnt_tsl
);
1395 if (strcasecmp(ds_hexsl
, ZFS_MLSLABEL_DEFAULT
) == 0) {
1397 * The dataset doesn't have a real label, so fabricate one.
1401 if (l_to_str_internal(mnt_sl
, &str
) == 0 &&
1402 dsl_prop_set(osname
, zfs_prop_to_name(ZFS_PROP_MLSLABEL
),
1403 ZPROP_SRC_LOCAL
, 1, strlen(str
) + 1, str
) == 0)
1406 kmem_free(str
, strlen(str
) + 1);
1407 } else if (hexstr_to_label(ds_hexsl
, &ds_sl
) == 0) {
1409 * Now compare labels to complete the MAC check. If the
1410 * labels are equal then allow access. If the mountpoint
1411 * label dominates the dataset label, allow readonly access.
1412 * Otherwise, access is denied.
1414 if (blequal(mnt_sl
, &ds_sl
))
1416 else if (bldominates(mnt_sl
, &ds_sl
)) {
1417 vfs_setmntopt(vfsp
, MNTOPT_RO
, NULL
, 0);
1422 label_rele(mnt_tsl
);
1428 zfs_mountroot(vfs_t
*vfsp
, enum whymountroot why
)
1431 static int zfsrootdone
= 0;
1432 zfsvfs_t
*zfsvfs
= NULL
;
1441 * The filesystem that we mount as root is defined in the
1442 * boot property "zfs-bootfs" with a format of
1443 * "poolname/root-dataset-objnum".
1445 if (why
== ROOT_INIT
) {
1449 * the process of doing a spa_load will require the
1450 * clock to be set before we could (for example) do
1451 * something better by looking at the timestamp on
1452 * an uberblock, so just set it to -1.
1456 if ((zfs_bootfs
= spa_get_bootprop("zfs-bootfs")) == NULL
) {
1457 cmn_err(CE_NOTE
, "spa_get_bootfs: can not get "
1461 zfs_devid
= spa_get_bootprop("diskdevid");
1462 error
= spa_import_rootpool(rootfs
.bo_name
, zfs_devid
);
1464 spa_free_bootprop(zfs_devid
);
1466 spa_free_bootprop(zfs_bootfs
);
1467 cmn_err(CE_NOTE
, "spa_import_rootpool: error %d",
1471 if (error
= zfs_parse_bootfs(zfs_bootfs
, rootfs
.bo_name
)) {
1472 spa_free_bootprop(zfs_bootfs
);
1473 cmn_err(CE_NOTE
, "zfs_parse_bootfs: error %d",
1478 spa_free_bootprop(zfs_bootfs
);
1480 if (error
= vfs_lock(vfsp
))
1483 if (error
= zfs_domount(vfsp
, rootfs
.bo_name
)) {
1484 cmn_err(CE_NOTE
, "zfs_domount: error %d", error
);
1488 zfsvfs
= (zfsvfs_t
*)vfsp
->vfs_data
;
1490 if (error
= zfs_zget(zfsvfs
, zfsvfs
->z_root
, &zp
)) {
1491 cmn_err(CE_NOTE
, "zfs_zget: error %d", error
);
1496 mutex_enter(&vp
->v_lock
);
1497 vp
->v_flag
|= VROOT
;
1498 mutex_exit(&vp
->v_lock
);
1502 * Leave rootvp held. The root file system is never unmounted.
1505 vfs_add((struct vnode
*)0, vfsp
,
1506 (vfsp
->vfs_flag
& VFS_RDONLY
) ? MS_RDONLY
: 0);
1510 } else if (why
== ROOT_REMOUNT
) {
1511 readonly_changed_cb(vfsp
->vfs_data
, B_FALSE
);
1512 vfsp
->vfs_flag
|= VFS_REMOUNT
;
1514 /* refresh mount options */
1515 zfs_unregister_callbacks(vfsp
->vfs_data
);
1516 return (zfs_register_callbacks(vfsp
));
1518 } else if (why
== ROOT_UNMOUNT
) {
1519 zfs_unregister_callbacks((zfsvfs_t
*)vfsp
->vfs_data
);
1520 (void) zfs_sync(vfsp
, 0, 0);
1525 * if "why" is equal to anything else other than ROOT_INIT,
1526 * ROOT_REMOUNT, or ROOT_UNMOUNT, we do not support it.
1533 zfs_mount(vfs_t
*vfsp
, vnode_t
*mvp
, struct mounta
*uap
, cred_t
*cr
)
1538 uio_seg_t fromspace
= (uap
->flags
& MS_SYSSPACE
) ?
1539 UIO_SYSSPACE
: UIO_USERSPACE
;
1542 if (mvp
->v_type
!= VDIR
)
1545 mutex_enter(&mvp
->v_lock
);
1546 if ((uap
->flags
& MS_REMOUNT
) == 0 &&
1547 (uap
->flags
& MS_OVERLAY
) == 0 &&
1548 (mvp
->v_count
!= 1 || (mvp
->v_flag
& VROOT
))) {
1549 mutex_exit(&mvp
->v_lock
);
1552 mutex_exit(&mvp
->v_lock
);
1555 * ZFS does not support passing unparsed data in via MS_DATA.
1556 * Users should use the MS_OPTIONSTR interface; this means
1557 * that all option parsing is already done and the options struct
1558 * can be interrogated.
1560 if ((uap
->flags
& MS_DATA
) && uap
->datalen
> 0)
1564 * Get the objset name (the "special" mount argument).
1566 if (error
= pn_get(uap
->spec
, fromspace
, &spn
))
1569 osname
= spn
.pn_path
;
1572 * Check for mount privilege?
1574 * If we don't have privilege then see if
1575 * we have local permission to allow it
1577 error
= secpolicy_fs_mount(cr
, mvp
, vfsp
);
1579 if (dsl_deleg_access(osname
, ZFS_DELEG_PERM_MOUNT
, cr
) == 0) {
1583 * Make sure user is the owner of the mount point
1584 * or has sufficient privileges.
1587 vattr
.va_mask
= AT_UID
;
1589 if (VOP_GETATTR(mvp
, &vattr
, 0, cr
, NULL
)) {
1593 if (secpolicy_vnode_owner(cr
, vattr
.va_uid
) != 0 &&
1594 VOP_ACCESS(mvp
, VWRITE
, 0, cr
, NULL
) != 0) {
1597 secpolicy_fs_mount_clearopts(cr
, vfsp
);
1604 * Refuse to mount a filesystem if we are in a local zone and the
1605 * dataset is not visible.
1607 if (!INGLOBALZONE(curproc
) &&
1608 (!zone_dataset_visible(osname
, &canwrite
) || !canwrite
)) {
1613 error
= zfs_mount_label_policy(vfsp
, osname
);
1618 * When doing a remount, we simply refresh our temporary properties
1619 * according to those options set in the current VFS options.
1621 if (uap
->flags
& MS_REMOUNT
) {
1622 /* refresh mount options */
1623 zfs_unregister_callbacks(vfsp
->vfs_data
);
1624 error
= zfs_register_callbacks(vfsp
);
1628 error
= zfs_domount(vfsp
, osname
);
1631 * Add an extra VFS_HOLD on our parent vfs so that it can't
1632 * disappear due to a forced unmount.
1634 if (error
== 0 && ((zfsvfs_t
*)vfsp
->vfs_data
)->z_issnap
)
1635 VFS_HOLD(mvp
->v_vfsp
);
1643 zfs_statvfs(vfs_t
*vfsp
, struct statvfs64
*statp
)
1645 zfsvfs_t
*zfsvfs
= vfsp
->vfs_data
;
1647 uint64_t refdbytes
, availbytes
, usedobjs
, availobjs
;
1651 dmu_objset_space(zfsvfs
->z_os
,
1652 &refdbytes
, &availbytes
, &usedobjs
, &availobjs
);
1655 * The underlying storage pool actually uses multiple block sizes.
1656 * We report the fragsize as the smallest block size we support,
1657 * and we report our blocksize as the filesystem's maximum blocksize.
1659 statp
->f_frsize
= 1UL << SPA_MINBLOCKSHIFT
;
1660 statp
->f_bsize
= zfsvfs
->z_max_blksz
;
1663 * The following report "total" blocks of various kinds in the
1664 * file system, but reported in terms of f_frsize - the
1668 statp
->f_blocks
= (refdbytes
+ availbytes
) >> SPA_MINBLOCKSHIFT
;
1669 statp
->f_bfree
= availbytes
>> SPA_MINBLOCKSHIFT
;
1670 statp
->f_bavail
= statp
->f_bfree
; /* no root reservation */
1673 * statvfs() should really be called statufs(), because it assumes
1674 * static metadata. ZFS doesn't preallocate files, so the best
1675 * we can do is report the max that could possibly fit in f_files,
1676 * and that minus the number actually used in f_ffree.
1677 * For f_ffree, report the smaller of the number of object available
1678 * and the number of blocks (each object will take at least a block).
1680 statp
->f_ffree
= MIN(availobjs
, statp
->f_bfree
);
1681 statp
->f_favail
= statp
->f_ffree
; /* no "root reservation" */
1682 statp
->f_files
= statp
->f_ffree
+ usedobjs
;
1684 (void) cmpldev(&d32
, vfsp
->vfs_dev
);
1685 statp
->f_fsid
= d32
;
1688 * We're a zfs filesystem.
1690 (void) strcpy(statp
->f_basetype
, vfssw
[vfsp
->vfs_fstype
].vsw_name
);
1692 statp
->f_flag
= vf_to_stf(vfsp
->vfs_flag
);
1694 statp
->f_namemax
= ZFS_MAXNAMELEN
;
1697 * We have all of 32 characters to stuff a string here.
1698 * Is there anything useful we could/should provide?
1700 bzero(statp
->f_fstr
, sizeof (statp
->f_fstr
));
1707 zfs_root(vfs_t
*vfsp
, vnode_t
**vpp
)
1709 zfsvfs_t
*zfsvfs
= vfsp
->vfs_data
;
1715 error
= zfs_zget(zfsvfs
, zfsvfs
->z_root
, &rootzp
);
1717 *vpp
= ZTOV(rootzp
);
1724 * Teardown the zfsvfs::z_os.
1726 * Note, if 'unmounting' if FALSE, we return with the 'z_teardown_lock'
1727 * and 'z_teardown_inactive_lock' held.
1730 zfsvfs_teardown(zfsvfs_t
*zfsvfs
, boolean_t unmounting
)
1734 rrw_enter(&zfsvfs
->z_teardown_lock
, RW_WRITER
, FTAG
);
1738 * We purge the parent filesystem's vfsp as the parent
1739 * filesystem and all of its snapshots have their vnode's
1740 * v_vfsp set to the parent's filesystem's vfsp. Note,
1741 * 'z_parent' is self referential for non-snapshots.
1743 (void) dnlc_purge_vfsp(zfsvfs
->z_parent
->z_vfs
, 0);
1747 * Close the zil. NB: Can't close the zil while zfs_inactive
1748 * threads are blocked as zil_close can call zfs_inactive.
1750 if (zfsvfs
->z_log
) {
1751 zil_close(zfsvfs
->z_log
);
1752 zfsvfs
->z_log
= NULL
;
1755 rw_enter(&zfsvfs
->z_teardown_inactive_lock
, RW_WRITER
);
1758 * If we are not unmounting (ie: online recv) and someone already
1759 * unmounted this file system while we were doing the switcheroo,
1760 * or a reopen of z_os failed then just bail out now.
1762 if (!unmounting
&& (zfsvfs
->z_unmounted
|| zfsvfs
->z_os
== NULL
)) {
1763 rw_exit(&zfsvfs
->z_teardown_inactive_lock
);
1764 rrw_exit(&zfsvfs
->z_teardown_lock
, FTAG
);
1769 * At this point there are no vops active, and any new vops will
1770 * fail with EIO since we have z_teardown_lock for writer (only
1771 * relavent for forced unmount).
1773 * Release all holds on dbufs.
1775 mutex_enter(&zfsvfs
->z_znodes_lock
);
1776 for (zp
= list_head(&zfsvfs
->z_all_znodes
); zp
!= NULL
;
1777 zp
= list_next(&zfsvfs
->z_all_znodes
, zp
))
1779 ASSERT(ZTOV(zp
)->v_count
> 0);
1780 zfs_znode_dmu_fini(zp
);
1782 mutex_exit(&zfsvfs
->z_znodes_lock
);
1785 * If we are unmounting, set the unmounted flag and let new vops
1786 * unblock. zfs_inactive will have the unmounted behavior, and all
1787 * other vops will fail with EIO.
1790 zfsvfs
->z_unmounted
= B_TRUE
;
1791 rrw_exit(&zfsvfs
->z_teardown_lock
, FTAG
);
1792 rw_exit(&zfsvfs
->z_teardown_inactive_lock
);
1796 * z_os will be NULL if there was an error in attempting to reopen
1797 * zfsvfs, so just return as the properties had already been
1798 * unregistered and cached data had been evicted before.
1800 if (zfsvfs
->z_os
== NULL
)
1804 * Unregister properties.
1806 zfs_unregister_callbacks(zfsvfs
);
1811 if (dmu_objset_is_dirty_anywhere(zfsvfs
->z_os
))
1812 if (!(zfsvfs
->z_vfs
->vfs_flag
& VFS_RDONLY
))
1813 txg_wait_synced(dmu_objset_pool(zfsvfs
->z_os
), 0);
1814 (void) dmu_objset_evict_dbufs(zfsvfs
->z_os
);
1821 zfs_umount(vfs_t
*vfsp
, int fflag
, cred_t
*cr
)
1823 zfsvfs_t
*zfsvfs
= vfsp
->vfs_data
;
1827 ret
= secpolicy_fs_unmount(cr
, vfsp
);
1829 if (dsl_deleg_access((char *)refstr_value(vfsp
->vfs_resource
),
1830 ZFS_DELEG_PERM_MOUNT
, cr
))
1835 * We purge the parent filesystem's vfsp as the parent filesystem
1836 * and all of its snapshots have their vnode's v_vfsp set to the
1837 * parent's filesystem's vfsp. Note, 'z_parent' is self
1838 * referential for non-snapshots.
1840 (void) dnlc_purge_vfsp(zfsvfs
->z_parent
->z_vfs
, 0);
1843 * Unmount any snapshots mounted under .zfs before unmounting the
1846 if (zfsvfs
->z_ctldir
!= NULL
&&
1847 (ret
= zfsctl_umount_snapshots(vfsp
, fflag
, cr
)) != 0) {
1851 if (!(fflag
& MS_FORCE
)) {
1853 * Check the number of active vnodes in the file system.
1854 * Our count is maintained in the vfs structure, but the
1855 * number is off by 1 to indicate a hold on the vfs
1858 * The '.zfs' directory maintains a reference of its
1859 * own, and any active references underneath are
1860 * reflected in the vnode count.
1862 if (zfsvfs
->z_ctldir
== NULL
) {
1863 if (vfsp
->vfs_count
> 1)
1866 if (vfsp
->vfs_count
> 2 ||
1867 zfsvfs
->z_ctldir
->v_count
> 1)
1872 vfsp
->vfs_flag
|= VFS_UNMOUNTED
;
1874 VERIFY(zfsvfs_teardown(zfsvfs
, B_TRUE
) == 0);
1878 * z_os will be NULL if there was an error in
1879 * attempting to reopen zfsvfs.
1883 * Unset the objset user_ptr.
1885 mutex_enter(&os
->os_user_ptr_lock
);
1886 dmu_objset_set_user(os
, NULL
);
1887 mutex_exit(&os
->os_user_ptr_lock
);
1890 * Finally release the objset
1892 dmu_objset_disown(os
, zfsvfs
);
1896 * We can now safely destroy the '.zfs' directory node.
1898 if (zfsvfs
->z_ctldir
!= NULL
)
1899 zfsctl_destroy(zfsvfs
);
1905 zfs_vget(vfs_t
*vfsp
, vnode_t
**vpp
, fid_t
*fidp
)
1907 zfsvfs_t
*zfsvfs
= vfsp
->vfs_data
;
1909 uint64_t object
= 0;
1910 uint64_t fid_gen
= 0;
1919 if (fidp
->fid_len
== LONG_FID_LEN
) {
1920 zfid_long_t
*zlfid
= (zfid_long_t
*)fidp
;
1921 uint64_t objsetid
= 0;
1922 uint64_t setgen
= 0;
1924 for (i
= 0; i
< sizeof (zlfid
->zf_setid
); i
++)
1925 objsetid
|= ((uint64_t)zlfid
->zf_setid
[i
]) << (8 * i
);
1927 for (i
= 0; i
< sizeof (zlfid
->zf_setgen
); i
++)
1928 setgen
|= ((uint64_t)zlfid
->zf_setgen
[i
]) << (8 * i
);
1932 err
= zfsctl_lookup_objset(vfsp
, objsetid
, &zfsvfs
);
1938 if (fidp
->fid_len
== SHORT_FID_LEN
|| fidp
->fid_len
== LONG_FID_LEN
) {
1939 zfid_short_t
*zfid
= (zfid_short_t
*)fidp
;
1941 for (i
= 0; i
< sizeof (zfid
->zf_object
); i
++)
1942 object
|= ((uint64_t)zfid
->zf_object
[i
]) << (8 * i
);
1944 for (i
= 0; i
< sizeof (zfid
->zf_gen
); i
++)
1945 fid_gen
|= ((uint64_t)zfid
->zf_gen
[i
]) << (8 * i
);
1951 /* A zero fid_gen means we are in the .zfs control directories */
1953 (object
== ZFSCTL_INO_ROOT
|| object
== ZFSCTL_INO_SNAPDIR
)) {
1954 *vpp
= zfsvfs
->z_ctldir
;
1955 ASSERT(*vpp
!= NULL
);
1956 if (object
== ZFSCTL_INO_SNAPDIR
) {
1957 VERIFY(zfsctl_root_lookup(*vpp
, "snapshot", vpp
, NULL
,
1958 0, NULL
, NULL
, NULL
, NULL
, NULL
) == 0);
1966 gen_mask
= -1ULL >> (64 - 8 * i
);
1968 dprintf("getting %llu [%u mask %llx]\n", object
, fid_gen
, gen_mask
);
1969 if (err
= zfs_zget(zfsvfs
, object
, &zp
)) {
1973 (void) sa_lookup(zp
->z_sa_hdl
, SA_ZPL_GEN(zfsvfs
), &zp_gen
,
1975 zp_gen
= zp_gen
& gen_mask
;
1978 if (zp
->z_unlinked
|| zp_gen
!= fid_gen
) {
1979 dprintf("znode gen (%u) != fid gen (%u)\n", zp_gen
, fid_gen
);
1991 * Block out VOPs and close zfsvfs_t::z_os
1993 * Note, if successful, then we return with the 'z_teardown_lock' and
1994 * 'z_teardown_inactive_lock' write held.
1997 zfs_suspend_fs(zfsvfs_t
*zfsvfs
)
2001 if ((error
= zfsvfs_teardown(zfsvfs
, B_FALSE
)) != 0)
2003 dmu_objset_disown(zfsvfs
->z_os
, zfsvfs
);
2009 * Reopen zfsvfs_t::z_os and release VOPs.
2012 zfs_resume_fs(zfsvfs_t
*zfsvfs
, const char *osname
)
2016 ASSERT(RRW_WRITE_HELD(&zfsvfs
->z_teardown_lock
));
2017 ASSERT(RW_WRITE_HELD(&zfsvfs
->z_teardown_inactive_lock
));
2019 err
= dmu_objset_own(osname
, DMU_OST_ZFS
, B_FALSE
, zfsvfs
,
2022 zfsvfs
->z_os
= NULL
;
2025 uint64_t sa_obj
= 0;
2027 err2
= zap_lookup(zfsvfs
->z_os
, MASTER_NODE_OBJ
,
2028 ZFS_SA_ATTRS
, 8, 1, &sa_obj
);
2030 if ((err
|| err2
) && zfsvfs
->z_version
>= ZPL_VERSION_SA
)
2034 if ((err
= sa_setup(zfsvfs
->z_os
, sa_obj
,
2035 zfs_attr_table
, ZPL_END
, &zfsvfs
->z_attr_table
)) != 0)
2038 VERIFY(zfsvfs_setup(zfsvfs
, B_FALSE
) == 0);
2041 * Attempt to re-establish all the active znodes with
2042 * their dbufs. If a zfs_rezget() fails, then we'll let
2043 * any potential callers discover that via ZFS_ENTER_VERIFY_VP
2044 * when they try to use their znode.
2046 mutex_enter(&zfsvfs
->z_znodes_lock
);
2047 for (zp
= list_head(&zfsvfs
->z_all_znodes
); zp
;
2048 zp
= list_next(&zfsvfs
->z_all_znodes
, zp
)) {
2049 (void) zfs_rezget(zp
);
2051 mutex_exit(&zfsvfs
->z_znodes_lock
);
2056 /* release the VOPs */
2057 rw_exit(&zfsvfs
->z_teardown_inactive_lock
);
2058 rrw_exit(&zfsvfs
->z_teardown_lock
, FTAG
);
2062 * Since we couldn't reopen zfsvfs::z_os, force
2063 * unmount this file system.
2065 if (vn_vfswlock(zfsvfs
->z_vfs
->vfs_vnodecovered
) == 0)
2066 (void) dounmount(zfsvfs
->z_vfs
, MS_FORCE
, CRED());
2072 zfs_freevfs(vfs_t
*vfsp
)
2074 zfsvfs_t
*zfsvfs
= vfsp
->vfs_data
;
2077 * If this is a snapshot, we have an extra VFS_HOLD on our parent
2078 * from zfs_mount(). Release it here. If we came through
2079 * zfs_mountroot() instead, we didn't grab an extra hold, so
2080 * skip the VFS_RELE for rootvfs.
2082 if (zfsvfs
->z_issnap
&& (vfsp
!= rootvfs
))
2083 VFS_RELE(zfsvfs
->z_parent
->z_vfs
);
2085 zfsvfs_free(zfsvfs
);
2087 atomic_add_32(&zfs_active_fs_count
, -1);
2091 * VFS_INIT() initialization. Note that there is no VFS_FINI(),
2092 * so we can't safely do any non-idempotent initialization here.
2093 * Leave that to zfs_init() and zfs_fini(), which are called
2094 * from the module's _init() and _fini() entry points.
2098 zfs_vfsinit(int fstype
, char *name
)
2105 * Setup vfsops and vnodeops tables.
2107 error
= vfs_setfsops(fstype
, zfs_vfsops_template
, &zfs_vfsops
);
2109 cmn_err(CE_WARN
, "zfs: bad vfs ops template");
2112 error
= zfs_create_op_tables();
2114 zfs_remove_op_tables();
2115 cmn_err(CE_WARN
, "zfs: bad vnode ops template");
2116 (void) vfs_freevfsops_by_type(zfsfstype
);
2120 mutex_init(&zfs_dev_mtx
, NULL
, MUTEX_DEFAULT
, NULL
);
2123 * Unique major number for all zfs mounts.
2124 * If we run out of 32-bit minors, we'll getudev() another major.
2126 zfs_major
= ddi_name_to_major(ZFS_DRIVER
);
2127 zfs_minor
= ZFS_MIN_MINOR
;
2131 #endif /* HAVE_ZPL */
2138 * Initialize .zfs directory structures
2143 * Initialize znode cache, vnode ops, etc...
2147 dmu_objset_register_type(DMU_OST_ZFS
, zfs_space_delta_cb
);
2148 #endif /* HAVE_ZPL */
2157 #endif /* HAVE_ZPL */
2162 zfs_set_version(zfsvfs_t
*zfsvfs
, uint64_t newvers
)
2165 objset_t
*os
= zfsvfs
->z_os
;
2168 if (newvers
< ZPL_VERSION_INITIAL
|| newvers
> ZPL_VERSION
)
2171 if (newvers
< zfsvfs
->z_version
)
2174 if (zfs_spa_version_map(newvers
) >
2175 spa_version(dmu_objset_spa(zfsvfs
->z_os
)))
2178 tx
= dmu_tx_create(os
);
2179 dmu_tx_hold_zap(tx
, MASTER_NODE_OBJ
, B_FALSE
, ZPL_VERSION_STR
);
2180 if (newvers
>= ZPL_VERSION_SA
&& !zfsvfs
->z_use_sa
) {
2181 dmu_tx_hold_zap(tx
, MASTER_NODE_OBJ
, B_TRUE
,
2183 dmu_tx_hold_zap(tx
, DMU_NEW_OBJECT
, FALSE
, NULL
);
2185 error
= dmu_tx_assign(tx
, TXG_WAIT
);
2191 error
= zap_update(os
, MASTER_NODE_OBJ
, ZPL_VERSION_STR
,
2192 8, 1, &newvers
, tx
);
2199 if (newvers
>= ZPL_VERSION_SA
&& !zfsvfs
->z_use_sa
) {
2202 ASSERT3U(spa_version(dmu_objset_spa(zfsvfs
->z_os
)), >=,
2204 sa_obj
= zap_create(os
, DMU_OT_SA_MASTER_NODE
,
2205 DMU_OT_NONE
, 0, tx
);
2207 error
= zap_add(os
, MASTER_NODE_OBJ
,
2208 ZFS_SA_ATTRS
, 8, 1, &sa_obj
, tx
);
2209 ASSERT3U(error
, ==, 0);
2211 VERIFY(0 == sa_set_sa_object(os
, sa_obj
));
2212 sa_register_update_callback(os
, zfs_sa_upgrade
);
2215 spa_history_log_internal(LOG_DS_UPGRADE
,
2216 dmu_objset_spa(os
), tx
, "oldver=%llu newver=%llu dataset = %llu",
2217 zfsvfs
->z_version
, newvers
, dmu_objset_id(os
));
2221 zfsvfs
->z_version
= newvers
;
2223 if (zfsvfs
->z_version
>= ZPL_VERSION_FUID
)
2224 zfs_set_fuid_feature(zfsvfs
);
2228 #endif /* HAVE_ZPL */
2231 * Read a property stored within the master node.
2234 zfs_get_zplprop(objset_t
*os
, zfs_prop_t prop
, uint64_t *value
)
2240 * Look up the file system's value for the property. For the
2241 * version property, we look up a slightly different string.
2243 if (prop
== ZFS_PROP_VERSION
)
2244 pname
= ZPL_VERSION_STR
;
2246 pname
= zfs_prop_to_name(prop
);
2249 error
= zap_lookup(os
, MASTER_NODE_OBJ
, pname
, 8, 1, value
);
2251 if (error
== ENOENT
) {
2252 /* No value set, use the default value */
2254 case ZFS_PROP_VERSION
:
2255 *value
= ZPL_VERSION
;
2257 case ZFS_PROP_NORMALIZE
:
2258 case ZFS_PROP_UTF8ONLY
:
2262 *value
= ZFS_CASE_SENSITIVE
;
2273 static vfsdef_t vfw
= {
2277 VSW_HASPROTO
|VSW_CANRWRO
|VSW_CANREMOUNT
|VSW_VOLATILEDEV
|VSW_STATS
|
2282 struct modlfs zfs_modlfs
= {
2283 &mod_fsops
, "ZFS filesystem version " SPA_VERSION_STRING
, &vfw
2285 #endif /* HAVE_ZPL */