4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
22 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
23 * Copyright (c) 2012, 2015 by Delphix. All rights reserved.
24 * Copyright (c) 2014 Integros [integros.com]
27 /* Portions Copyright 2010 Robert Milkowski */
29 #include <sys/types.h>
30 #include <sys/param.h>
31 #include <sys/systm.h>
32 #include <sys/sysmacros.h>
34 #include <sys/pathname.h>
35 #include <sys/vnode.h>
37 #include <sys/vfs_opreg.h>
38 #include <sys/mntent.h>
39 #include <sys/mount.h>
40 #include <sys/cmn_err.h>
41 #include "fs/fs_subr.h"
42 #include <sys/zfs_znode.h>
43 #include <sys/zfs_dir.h>
45 #include <sys/fs/zfs.h>
47 #include <sys/dsl_prop.h>
48 #include <sys/dsl_dataset.h>
49 #include <sys/dsl_deleg.h>
53 #include <sys/sa_impl.h>
54 #include <sys/varargs.h>
55 #include <sys/policy.h>
56 #include <sys/atomic.h>
57 #include <sys/mkdev.h>
58 #include <sys/modctl.h>
59 #include <sys/refstr.h>
60 #include <sys/zfs_ioctl.h>
61 #include <sys/zfs_ctldir.h>
62 #include <sys/zfs_fuid.h>
63 #include <sys/bootconf.h>
64 #include <sys/sunddi.h>
66 #include <sys/dmu_objset.h>
67 #include <sys/spa_boot.h>
68 #include "zfs_comutil.h"
71 vfsops_t
*zfs_vfsops
= NULL
;
72 static major_t zfs_major
;
73 static minor_t zfs_minor
;
74 static kmutex_t zfs_dev_mtx
;
76 extern int sys_shutdown
;
78 static int zfs_mount(vfs_t
*vfsp
, vnode_t
*mvp
, struct mounta
*uap
, cred_t
*cr
);
79 static int zfs_umount(vfs_t
*vfsp
, int fflag
, cred_t
*cr
);
80 static int zfs_mountroot(vfs_t
*vfsp
, enum whymountroot
);
81 static int zfs_root(vfs_t
*vfsp
, vnode_t
**vpp
);
82 static int zfs_statvfs(vfs_t
*vfsp
, struct statvfs64
*statp
);
83 static int zfs_vget(vfs_t
*vfsp
, vnode_t
**vpp
, fid_t
*fidp
);
84 static void zfs_freevfs(vfs_t
*vfsp
);
86 static const fs_operation_def_t zfs_vfsops_template
[] = {
87 VFSNAME_MOUNT
, { .vfs_mount
= zfs_mount
},
88 VFSNAME_MOUNTROOT
, { .vfs_mountroot
= zfs_mountroot
},
89 VFSNAME_UNMOUNT
, { .vfs_unmount
= zfs_umount
},
90 VFSNAME_ROOT
, { .vfs_root
= zfs_root
},
91 VFSNAME_STATVFS
, { .vfs_statvfs
= zfs_statvfs
},
92 VFSNAME_SYNC
, { .vfs_sync
= zfs_sync
},
93 VFSNAME_VGET
, { .vfs_vget
= zfs_vget
},
94 VFSNAME_FREEVFS
, { .vfs_freevfs
= zfs_freevfs
},
98 static const fs_operation_def_t zfs_vfsops_eio_template
[] = {
99 VFSNAME_FREEVFS
, { .vfs_freevfs
= zfs_freevfs
},
104 * We need to keep a count of active fs's.
105 * This is necessary to prevent our module
106 * from being unloaded after a umount -f
108 static uint32_t zfs_active_fs_count
= 0;
110 static char *noatime_cancel
[] = { MNTOPT_ATIME
, NULL
};
111 static char *atime_cancel
[] = { MNTOPT_NOATIME
, NULL
};
112 static char *noxattr_cancel
[] = { MNTOPT_XATTR
, NULL
};
113 static char *xattr_cancel
[] = { MNTOPT_NOXATTR
, NULL
};
116 * MO_DEFAULT is not used since the default value is determined
117 * by the equivalent property.
119 static mntopt_t mntopts
[] = {
120 { MNTOPT_NOXATTR
, noxattr_cancel
, NULL
, 0, NULL
},
121 { MNTOPT_XATTR
, xattr_cancel
, NULL
, 0, NULL
},
122 { MNTOPT_NOATIME
, noatime_cancel
, NULL
, 0, NULL
},
123 { MNTOPT_ATIME
, atime_cancel
, NULL
, 0, NULL
}
126 static mntopts_t zfs_mntopts
= {
127 sizeof (mntopts
) / sizeof (mntopt_t
),
133 zfs_sync(vfs_t
*vfsp
, short flag
, cred_t
*cr
)
136 * Data integrity is job one. We don't want a compromised kernel
137 * writing to the storage pool, so we never sync during panic.
143 * SYNC_ATTR is used by fsflush() to force old filesystems like UFS
144 * to sync metadata, which they would otherwise cache indefinitely.
145 * Semantically, the only requirement is that the sync be initiated.
146 * The DMU syncs out txgs frequently, so there's nothing to do.
148 if (flag
& SYNC_ATTR
)
153 * Sync a specific filesystem.
155 zfsvfs_t
*zfsvfs
= vfsp
->vfs_data
;
159 dp
= dmu_objset_pool(zfsvfs
->z_os
);
162 * If the system is shutting down, then skip any
163 * filesystems which may exist on a suspended pool.
165 if (sys_shutdown
&& spa_suspended(dp
->dp_spa
)) {
170 if (zfsvfs
->z_log
!= NULL
)
171 zil_commit(zfsvfs
->z_log
, 0);
176 * Sync all ZFS filesystems. This is what happens when you
177 * run sync(1M). Unlike other filesystems, ZFS honors the
178 * request by waiting for all pools to commit all dirty data.
187 zfs_create_unique_device(dev_t
*dev
)
192 ASSERT3U(zfs_minor
, <=, MAXMIN32
);
193 minor_t start
= zfs_minor
;
195 mutex_enter(&zfs_dev_mtx
);
196 if (zfs_minor
>= MAXMIN32
) {
198 * If we're still using the real major
199 * keep out of /dev/zfs and /dev/zvol minor
200 * number space. If we're using a getudev()'ed
201 * major number, we can use all of its minors.
203 if (zfs_major
== ddi_name_to_major(ZFS_DRIVER
))
204 zfs_minor
= ZFS_MIN_MINOR
;
210 *dev
= makedevice(zfs_major
, zfs_minor
);
211 mutex_exit(&zfs_dev_mtx
);
212 } while (vfs_devismounted(*dev
) && zfs_minor
!= start
);
213 if (zfs_minor
== start
) {
215 * We are using all ~262,000 minor numbers for the
216 * current major number. Create a new major number.
218 if ((new_major
= getudev()) == (major_t
)-1) {
220 "zfs_mount: Can't get unique major "
224 mutex_enter(&zfs_dev_mtx
);
225 zfs_major
= new_major
;
228 mutex_exit(&zfs_dev_mtx
);
232 /* CONSTANTCONDITION */
239 atime_changed_cb(void *arg
, uint64_t newval
)
241 zfsvfs_t
*zfsvfs
= arg
;
243 if (newval
== TRUE
) {
244 zfsvfs
->z_atime
= TRUE
;
245 vfs_clearmntopt(zfsvfs
->z_vfs
, MNTOPT_NOATIME
);
246 vfs_setmntopt(zfsvfs
->z_vfs
, MNTOPT_ATIME
, NULL
, 0);
248 zfsvfs
->z_atime
= FALSE
;
249 vfs_clearmntopt(zfsvfs
->z_vfs
, MNTOPT_ATIME
);
250 vfs_setmntopt(zfsvfs
->z_vfs
, MNTOPT_NOATIME
, NULL
, 0);
255 xattr_changed_cb(void *arg
, uint64_t newval
)
257 zfsvfs_t
*zfsvfs
= arg
;
259 if (newval
== TRUE
) {
260 /* XXX locking on vfs_flag? */
261 zfsvfs
->z_vfs
->vfs_flag
|= VFS_XATTR
;
262 vfs_clearmntopt(zfsvfs
->z_vfs
, MNTOPT_NOXATTR
);
263 vfs_setmntopt(zfsvfs
->z_vfs
, MNTOPT_XATTR
, NULL
, 0);
265 /* XXX locking on vfs_flag? */
266 zfsvfs
->z_vfs
->vfs_flag
&= ~VFS_XATTR
;
267 vfs_clearmntopt(zfsvfs
->z_vfs
, MNTOPT_XATTR
);
268 vfs_setmntopt(zfsvfs
->z_vfs
, MNTOPT_NOXATTR
, NULL
, 0);
273 blksz_changed_cb(void *arg
, uint64_t newval
)
275 zfsvfs_t
*zfsvfs
= arg
;
276 ASSERT3U(newval
, <=, spa_maxblocksize(dmu_objset_spa(zfsvfs
->z_os
)));
277 ASSERT3U(newval
, >=, SPA_MINBLOCKSIZE
);
278 ASSERT(ISP2(newval
));
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_mode_changed_cb(void *arg
, uint64_t newval
)
390 zfsvfs_t
*zfsvfs
= arg
;
392 zfsvfs
->z_acl_mode
= newval
;
396 acl_inherit_changed_cb(void *arg
, uint64_t newval
)
398 zfsvfs_t
*zfsvfs
= arg
;
400 zfsvfs
->z_acl_inherit
= newval
;
404 zfs_register_callbacks(vfs_t
*vfsp
)
406 struct dsl_dataset
*ds
= NULL
;
408 zfsvfs_t
*zfsvfs
= NULL
;
410 boolean_t readonly
= B_FALSE
;
411 boolean_t do_readonly
= B_FALSE
;
412 boolean_t setuid
= B_FALSE
;
413 boolean_t do_setuid
= B_FALSE
;
414 boolean_t exec
= B_FALSE
;
415 boolean_t do_exec
= B_FALSE
;
416 boolean_t devices
= B_FALSE
;
417 boolean_t do_devices
= B_FALSE
;
418 boolean_t xattr
= B_FALSE
;
419 boolean_t do_xattr
= B_FALSE
;
420 boolean_t atime
= B_FALSE
;
421 boolean_t do_atime
= B_FALSE
;
425 zfsvfs
= vfsp
->vfs_data
;
430 * The act of registering our callbacks will destroy any mount
431 * options we may have. In order to enable temporary overrides
432 * of mount options, we stash away the current values and
433 * restore them after we register the callbacks.
435 if (vfs_optionisset(vfsp
, MNTOPT_RO
, NULL
) ||
436 !spa_writeable(dmu_objset_spa(os
))) {
438 do_readonly
= B_TRUE
;
439 } else if (vfs_optionisset(vfsp
, MNTOPT_RW
, NULL
)) {
441 do_readonly
= B_TRUE
;
443 if (vfs_optionisset(vfsp
, MNTOPT_NOSUID
, NULL
)) {
449 if (vfs_optionisset(vfsp
, MNTOPT_NODEVICES
, NULL
)) {
452 } else if (vfs_optionisset(vfsp
, MNTOPT_DEVICES
, NULL
)) {
457 if (vfs_optionisset(vfsp
, MNTOPT_NOSETUID
, NULL
)) {
460 } else if (vfs_optionisset(vfsp
, MNTOPT_SETUID
, NULL
)) {
465 if (vfs_optionisset(vfsp
, MNTOPT_NOEXEC
, NULL
)) {
468 } else if (vfs_optionisset(vfsp
, MNTOPT_EXEC
, NULL
)) {
472 if (vfs_optionisset(vfsp
, MNTOPT_NOXATTR
, NULL
)) {
475 } else if (vfs_optionisset(vfsp
, MNTOPT_XATTR
, NULL
)) {
479 if (vfs_optionisset(vfsp
, MNTOPT_NOATIME
, NULL
)) {
482 } else if (vfs_optionisset(vfsp
, MNTOPT_ATIME
, NULL
)) {
488 * nbmand is a special property. It can only be changed at
491 * This is weird, but it is documented to only be changeable
494 if (vfs_optionisset(vfsp
, MNTOPT_NONBMAND
, NULL
)) {
496 } else if (vfs_optionisset(vfsp
, MNTOPT_NBMAND
, NULL
)) {
499 char osname
[MAXNAMELEN
];
501 dmu_objset_name(os
, osname
);
502 if (error
= dsl_prop_get_integer(osname
, "nbmand", &nbmand
,
509 * Register property callbacks.
511 * It would probably be fine to just check for i/o error from
512 * the first prop_register(), but I guess I like to go
515 ds
= dmu_objset_ds(os
);
516 dsl_pool_config_enter(dmu_objset_pool(os
), FTAG
);
517 error
= dsl_prop_register(ds
,
518 zfs_prop_to_name(ZFS_PROP_ATIME
), atime_changed_cb
, zfsvfs
);
519 error
= error
? error
: dsl_prop_register(ds
,
520 zfs_prop_to_name(ZFS_PROP_XATTR
), xattr_changed_cb
, zfsvfs
);
521 error
= error
? error
: dsl_prop_register(ds
,
522 zfs_prop_to_name(ZFS_PROP_RECORDSIZE
), blksz_changed_cb
, zfsvfs
);
523 error
= error
? error
: dsl_prop_register(ds
,
524 zfs_prop_to_name(ZFS_PROP_READONLY
), readonly_changed_cb
, zfsvfs
);
525 error
= error
? error
: dsl_prop_register(ds
,
526 zfs_prop_to_name(ZFS_PROP_DEVICES
), devices_changed_cb
, zfsvfs
);
527 error
= error
? error
: dsl_prop_register(ds
,
528 zfs_prop_to_name(ZFS_PROP_SETUID
), setuid_changed_cb
, zfsvfs
);
529 error
= error
? error
: dsl_prop_register(ds
,
530 zfs_prop_to_name(ZFS_PROP_EXEC
), exec_changed_cb
, zfsvfs
);
531 error
= error
? error
: dsl_prop_register(ds
,
532 zfs_prop_to_name(ZFS_PROP_SNAPDIR
), snapdir_changed_cb
, zfsvfs
);
533 error
= error
? error
: dsl_prop_register(ds
,
534 zfs_prop_to_name(ZFS_PROP_ACLMODE
), acl_mode_changed_cb
, zfsvfs
);
535 error
= error
? error
: dsl_prop_register(ds
,
536 zfs_prop_to_name(ZFS_PROP_ACLINHERIT
), acl_inherit_changed_cb
,
538 error
= error
? error
: dsl_prop_register(ds
,
539 zfs_prop_to_name(ZFS_PROP_VSCAN
), vscan_changed_cb
, zfsvfs
);
540 dsl_pool_config_exit(dmu_objset_pool(os
), FTAG
);
545 * Invoke our callbacks to restore temporary mount options.
548 readonly_changed_cb(zfsvfs
, readonly
);
550 setuid_changed_cb(zfsvfs
, setuid
);
552 exec_changed_cb(zfsvfs
, exec
);
554 devices_changed_cb(zfsvfs
, devices
);
556 xattr_changed_cb(zfsvfs
, xattr
);
558 atime_changed_cb(zfsvfs
, atime
);
560 nbmand_changed_cb(zfsvfs
, nbmand
);
565 dsl_prop_unregister_all(ds
, zfsvfs
);
570 zfs_space_delta_cb(dmu_object_type_t bonustype
, void *data
,
571 uint64_t *userp
, uint64_t *groupp
)
574 * Is it a valid type of object to track?
576 if (bonustype
!= DMU_OT_ZNODE
&& bonustype
!= DMU_OT_SA
)
577 return (SET_ERROR(ENOENT
));
580 * If we have a NULL data pointer
581 * then assume the id's aren't changing and
582 * return EEXIST to the dmu to let it know to
586 return (SET_ERROR(EEXIST
));
588 if (bonustype
== DMU_OT_ZNODE
) {
589 znode_phys_t
*znp
= data
;
590 *userp
= znp
->zp_uid
;
591 *groupp
= znp
->zp_gid
;
594 sa_hdr_phys_t
*sap
= data
;
595 sa_hdr_phys_t sa
= *sap
;
596 boolean_t swap
= B_FALSE
;
598 ASSERT(bonustype
== DMU_OT_SA
);
600 if (sa
.sa_magic
== 0) {
602 * This should only happen for newly created
603 * files that haven't had the znode data filled
610 if (sa
.sa_magic
== BSWAP_32(SA_MAGIC
)) {
611 sa
.sa_magic
= SA_MAGIC
;
612 sa
.sa_layout_info
= BSWAP_16(sa
.sa_layout_info
);
615 VERIFY3U(sa
.sa_magic
, ==, SA_MAGIC
);
618 hdrsize
= sa_hdrsize(&sa
);
619 VERIFY3U(hdrsize
, >=, sizeof (sa_hdr_phys_t
));
620 *userp
= *((uint64_t *)((uintptr_t)data
+ hdrsize
+
622 *groupp
= *((uint64_t *)((uintptr_t)data
+ hdrsize
+
625 *userp
= BSWAP_64(*userp
);
626 *groupp
= BSWAP_64(*groupp
);
633 fuidstr_to_sid(zfsvfs_t
*zfsvfs
, const char *fuidstr
,
634 char *domainbuf
, int buflen
, uid_t
*ridp
)
639 fuid
= strtonum(fuidstr
, NULL
);
641 domain
= zfs_fuid_find_by_idx(zfsvfs
, FUID_INDEX(fuid
));
643 (void) strlcpy(domainbuf
, domain
, buflen
);
646 *ridp
= FUID_RID(fuid
);
650 zfs_userquota_prop_to_obj(zfsvfs_t
*zfsvfs
, zfs_userquota_prop_t type
)
653 case ZFS_PROP_USERUSED
:
654 return (DMU_USERUSED_OBJECT
);
655 case ZFS_PROP_GROUPUSED
:
656 return (DMU_GROUPUSED_OBJECT
);
657 case ZFS_PROP_USERQUOTA
:
658 return (zfsvfs
->z_userquota_obj
);
659 case ZFS_PROP_GROUPQUOTA
:
660 return (zfsvfs
->z_groupquota_obj
);
666 zfs_userspace_many(zfsvfs_t
*zfsvfs
, zfs_userquota_prop_t type
,
667 uint64_t *cookiep
, void *vbuf
, uint64_t *bufsizep
)
672 zfs_useracct_t
*buf
= vbuf
;
675 if (!dmu_objset_userspace_present(zfsvfs
->z_os
))
676 return (SET_ERROR(ENOTSUP
));
678 obj
= zfs_userquota_prop_to_obj(zfsvfs
, type
);
684 for (zap_cursor_init_serialized(&zc
, zfsvfs
->z_os
, obj
, *cookiep
);
685 (error
= zap_cursor_retrieve(&zc
, &za
)) == 0;
686 zap_cursor_advance(&zc
)) {
687 if ((uintptr_t)buf
- (uintptr_t)vbuf
+ sizeof (zfs_useracct_t
) >
691 fuidstr_to_sid(zfsvfs
, za
.za_name
,
692 buf
->zu_domain
, sizeof (buf
->zu_domain
), &buf
->zu_rid
);
694 buf
->zu_space
= za
.za_first_integer
;
700 ASSERT3U((uintptr_t)buf
- (uintptr_t)vbuf
, <=, *bufsizep
);
701 *bufsizep
= (uintptr_t)buf
- (uintptr_t)vbuf
;
702 *cookiep
= zap_cursor_serialize(&zc
);
703 zap_cursor_fini(&zc
);
708 * buf must be big enough (eg, 32 bytes)
711 id_to_fuidstr(zfsvfs_t
*zfsvfs
, const char *domain
, uid_t rid
,
712 char *buf
, boolean_t addok
)
717 if (domain
&& domain
[0]) {
718 domainid
= zfs_fuid_find_by_domain(zfsvfs
, domain
, NULL
, addok
);
720 return (SET_ERROR(ENOENT
));
722 fuid
= FUID_ENCODE(domainid
, rid
);
723 (void) sprintf(buf
, "%llx", (longlong_t
)fuid
);
728 zfs_userspace_one(zfsvfs_t
*zfsvfs
, zfs_userquota_prop_t type
,
729 const char *domain
, uint64_t rid
, uint64_t *valp
)
737 if (!dmu_objset_userspace_present(zfsvfs
->z_os
))
738 return (SET_ERROR(ENOTSUP
));
740 obj
= zfs_userquota_prop_to_obj(zfsvfs
, type
);
744 err
= id_to_fuidstr(zfsvfs
, domain
, rid
, buf
, B_FALSE
);
748 err
= zap_lookup(zfsvfs
->z_os
, obj
, buf
, 8, 1, valp
);
755 zfs_set_userquota(zfsvfs_t
*zfsvfs
, zfs_userquota_prop_t type
,
756 const char *domain
, uint64_t rid
, uint64_t quota
)
762 boolean_t fuid_dirtied
;
764 if (type
!= ZFS_PROP_USERQUOTA
&& type
!= ZFS_PROP_GROUPQUOTA
)
765 return (SET_ERROR(EINVAL
));
767 if (zfsvfs
->z_version
< ZPL_VERSION_USERSPACE
)
768 return (SET_ERROR(ENOTSUP
));
770 objp
= (type
== ZFS_PROP_USERQUOTA
) ? &zfsvfs
->z_userquota_obj
:
771 &zfsvfs
->z_groupquota_obj
;
773 err
= id_to_fuidstr(zfsvfs
, domain
, rid
, buf
, B_TRUE
);
776 fuid_dirtied
= zfsvfs
->z_fuid_dirty
;
778 tx
= dmu_tx_create(zfsvfs
->z_os
);
779 dmu_tx_hold_zap(tx
, *objp
? *objp
: DMU_NEW_OBJECT
, B_TRUE
, NULL
);
781 dmu_tx_hold_zap(tx
, MASTER_NODE_OBJ
, B_TRUE
,
782 zfs_userquota_prop_prefixes
[type
]);
785 zfs_fuid_txhold(zfsvfs
, tx
);
786 err
= dmu_tx_assign(tx
, TXG_WAIT
);
792 mutex_enter(&zfsvfs
->z_lock
);
794 *objp
= zap_create(zfsvfs
->z_os
, DMU_OT_USERGROUP_QUOTA
,
796 VERIFY(0 == zap_add(zfsvfs
->z_os
, MASTER_NODE_OBJ
,
797 zfs_userquota_prop_prefixes
[type
], 8, 1, objp
, tx
));
799 mutex_exit(&zfsvfs
->z_lock
);
802 err
= zap_remove(zfsvfs
->z_os
, *objp
, buf
, tx
);
806 err
= zap_update(zfsvfs
->z_os
, *objp
, buf
, 8, 1, "a
, tx
);
810 zfs_fuid_sync(zfsvfs
, tx
);
816 zfs_fuid_overquota(zfsvfs_t
*zfsvfs
, boolean_t isgroup
, uint64_t fuid
)
819 uint64_t used
, quota
, usedobj
, quotaobj
;
822 usedobj
= isgroup
? DMU_GROUPUSED_OBJECT
: DMU_USERUSED_OBJECT
;
823 quotaobj
= isgroup
? zfsvfs
->z_groupquota_obj
: zfsvfs
->z_userquota_obj
;
825 if (quotaobj
== 0 || zfsvfs
->z_replay
)
828 (void) sprintf(buf
, "%llx", (longlong_t
)fuid
);
829 err
= zap_lookup(zfsvfs
->z_os
, quotaobj
, buf
, 8, 1, "a
);
833 err
= zap_lookup(zfsvfs
->z_os
, usedobj
, buf
, 8, 1, &used
);
836 return (used
>= quota
);
840 zfs_owner_overquota(zfsvfs_t
*zfsvfs
, znode_t
*zp
, boolean_t isgroup
)
845 quotaobj
= isgroup
? zfsvfs
->z_groupquota_obj
: zfsvfs
->z_userquota_obj
;
847 fuid
= isgroup
? zp
->z_gid
: zp
->z_uid
;
849 if (quotaobj
== 0 || zfsvfs
->z_replay
)
852 return (zfs_fuid_overquota(zfsvfs
, isgroup
, fuid
));
856 * Associate this zfsvfs with the given objset, which must be owned.
857 * This will cache a bunch of on-disk state from the objset in the
861 zfsvfs_init(zfsvfs_t
*zfsvfs
, objset_t
*os
)
866 zfsvfs
->z_max_blksz
= SPA_OLD_MAXBLOCKSIZE
;
867 zfsvfs
->z_show_ctldir
= ZFS_SNAPDIR_VISIBLE
;
870 error
= zfs_get_zplprop(os
, ZFS_PROP_VERSION
, &zfsvfs
->z_version
);
873 if (zfsvfs
->z_version
>
874 zfs_zpl_version_map(spa_version(dmu_objset_spa(os
)))) {
875 (void) printf("Can't mount a version %lld file system "
876 "on a version %lld pool\n. Pool must be upgraded to mount "
877 "this file system.", (u_longlong_t
)zfsvfs
->z_version
,
878 (u_longlong_t
)spa_version(dmu_objset_spa(os
)));
879 return (SET_ERROR(ENOTSUP
));
881 error
= zfs_get_zplprop(os
, ZFS_PROP_NORMALIZE
, &val
);
884 zfsvfs
->z_norm
= (int)val
;
886 error
= zfs_get_zplprop(os
, ZFS_PROP_UTF8ONLY
, &val
);
889 zfsvfs
->z_utf8
= (val
!= 0);
891 error
= zfs_get_zplprop(os
, ZFS_PROP_CASE
, &val
);
894 zfsvfs
->z_case
= (uint_t
)val
;
897 * Fold case on file systems that are always or sometimes case
900 if (zfsvfs
->z_case
== ZFS_CASE_INSENSITIVE
||
901 zfsvfs
->z_case
== ZFS_CASE_MIXED
)
902 zfsvfs
->z_norm
|= U8_TEXTPREP_TOUPPER
;
904 zfsvfs
->z_use_fuids
= USE_FUIDS(zfsvfs
->z_version
, zfsvfs
->z_os
);
905 zfsvfs
->z_use_sa
= USE_SA(zfsvfs
->z_version
, zfsvfs
->z_os
);
908 if (zfsvfs
->z_use_sa
) {
909 /* should either have both of these objects or none */
910 error
= zap_lookup(os
, MASTER_NODE_OBJ
, ZFS_SA_ATTRS
, 8, 1,
916 error
= sa_setup(os
, sa_obj
, zfs_attr_table
, ZPL_END
,
917 &zfsvfs
->z_attr_table
);
921 if (zfsvfs
->z_version
>= ZPL_VERSION_SA
)
922 sa_register_update_callback(os
, zfs_sa_upgrade
);
924 error
= zap_lookup(os
, MASTER_NODE_OBJ
, ZFS_ROOT_OBJ
, 8, 1,
928 ASSERT(zfsvfs
->z_root
!= 0);
930 error
= zap_lookup(os
, MASTER_NODE_OBJ
, ZFS_UNLINKED_SET
, 8, 1,
931 &zfsvfs
->z_unlinkedobj
);
935 error
= zap_lookup(os
, MASTER_NODE_OBJ
,
936 zfs_userquota_prop_prefixes
[ZFS_PROP_USERQUOTA
],
937 8, 1, &zfsvfs
->z_userquota_obj
);
939 zfsvfs
->z_userquota_obj
= 0;
943 error
= zap_lookup(os
, MASTER_NODE_OBJ
,
944 zfs_userquota_prop_prefixes
[ZFS_PROP_GROUPQUOTA
],
945 8, 1, &zfsvfs
->z_groupquota_obj
);
947 zfsvfs
->z_groupquota_obj
= 0;
951 error
= zap_lookup(os
, MASTER_NODE_OBJ
, ZFS_FUID_TABLES
, 8, 1,
952 &zfsvfs
->z_fuid_obj
);
954 zfsvfs
->z_fuid_obj
= 0;
958 error
= zap_lookup(os
, MASTER_NODE_OBJ
, ZFS_SHARES_DIR
, 8, 1,
959 &zfsvfs
->z_shares_dir
);
961 zfsvfs
->z_shares_dir
= 0;
969 zfsvfs_create(const char *osname
, zfsvfs_t
**zfvp
)
975 zfsvfs
= kmem_zalloc(sizeof (zfsvfs_t
), KM_SLEEP
);
978 * We claim to always be readonly so we can open snapshots;
979 * other ZPL code will prevent us from writing to snapshots.
981 error
= dmu_objset_own(osname
, DMU_OST_ZFS
, B_TRUE
, zfsvfs
, &os
);
983 kmem_free(zfsvfs
, sizeof (zfsvfs_t
));
987 zfsvfs
->z_vfs
= NULL
;
988 zfsvfs
->z_parent
= zfsvfs
;
990 mutex_init(&zfsvfs
->z_znodes_lock
, NULL
, MUTEX_DEFAULT
, NULL
);
991 mutex_init(&zfsvfs
->z_lock
, NULL
, MUTEX_DEFAULT
, NULL
);
992 list_create(&zfsvfs
->z_all_znodes
, sizeof (znode_t
),
993 offsetof(znode_t
, z_link_node
));
994 rrm_init(&zfsvfs
->z_teardown_lock
, B_FALSE
);
995 rw_init(&zfsvfs
->z_teardown_inactive_lock
, NULL
, RW_DEFAULT
, NULL
);
996 rw_init(&zfsvfs
->z_fuid_lock
, NULL
, RW_DEFAULT
, NULL
);
997 for (int i
= 0; i
!= ZFS_OBJ_MTX_SZ
; i
++)
998 mutex_init(&zfsvfs
->z_hold_mtx
[i
], NULL
, MUTEX_DEFAULT
, NULL
);
1000 error
= zfsvfs_init(zfsvfs
, os
);
1002 dmu_objset_disown(os
, zfsvfs
);
1004 kmem_free(zfsvfs
, sizeof (zfsvfs_t
));
1013 zfsvfs_setup(zfsvfs_t
*zfsvfs
, boolean_t mounting
)
1017 error
= zfs_register_callbacks(zfsvfs
->z_vfs
);
1022 * Set the objset user_ptr to track its zfsvfs.
1024 mutex_enter(&zfsvfs
->z_os
->os_user_ptr_lock
);
1025 dmu_objset_set_user(zfsvfs
->z_os
, zfsvfs
);
1026 mutex_exit(&zfsvfs
->z_os
->os_user_ptr_lock
);
1028 zfsvfs
->z_log
= zil_open(zfsvfs
->z_os
, zfs_get_data
);
1031 * If we are not mounting (ie: online recv), then we don't
1032 * have to worry about replaying the log as we blocked all
1033 * operations out since we closed the ZIL.
1039 * During replay we remove the read only flag to
1040 * allow replays to succeed.
1042 readonly
= zfsvfs
->z_vfs
->vfs_flag
& VFS_RDONLY
;
1044 zfsvfs
->z_vfs
->vfs_flag
&= ~VFS_RDONLY
;
1046 zfs_unlinked_drain(zfsvfs
);
1049 * Parse and replay the intent log.
1051 * Because of ziltest, this must be done after
1052 * zfs_unlinked_drain(). (Further note: ziltest
1053 * doesn't use readonly mounts, where
1054 * zfs_unlinked_drain() isn't called.) This is because
1055 * ziltest causes spa_sync() to think it's committed,
1056 * but actually it is not, so the intent log contains
1057 * many txg's worth of changes.
1059 * In particular, if object N is in the unlinked set in
1060 * the last txg to actually sync, then it could be
1061 * actually freed in a later txg and then reallocated
1062 * in a yet later txg. This would write a "create
1063 * object N" record to the intent log. Normally, this
1064 * would be fine because the spa_sync() would have
1065 * written out the fact that object N is free, before
1066 * we could write the "create object N" intent log
1069 * But when we are in ziltest mode, we advance the "open
1070 * txg" without actually spa_sync()-ing the changes to
1071 * disk. So we would see that object N is still
1072 * allocated and in the unlinked set, and there is an
1073 * intent log record saying to allocate it.
1075 if (spa_writeable(dmu_objset_spa(zfsvfs
->z_os
))) {
1076 if (zil_replay_disable
) {
1077 zil_destroy(zfsvfs
->z_log
, B_FALSE
);
1079 zfsvfs
->z_replay
= B_TRUE
;
1080 zil_replay(zfsvfs
->z_os
, zfsvfs
,
1082 zfsvfs
->z_replay
= B_FALSE
;
1085 zfsvfs
->z_vfs
->vfs_flag
|= readonly
; /* restore readonly bit */
1092 zfsvfs_free(zfsvfs_t
*zfsvfs
)
1095 extern krwlock_t zfsvfs_lock
; /* in zfs_znode.c */
1098 * This is a barrier to prevent the filesystem from going away in
1099 * zfs_znode_move() until we can safely ensure that the filesystem is
1100 * not unmounted. We consider the filesystem valid before the barrier
1101 * and invalid after the barrier.
1103 rw_enter(&zfsvfs_lock
, RW_READER
);
1104 rw_exit(&zfsvfs_lock
);
1106 zfs_fuid_destroy(zfsvfs
);
1108 mutex_destroy(&zfsvfs
->z_znodes_lock
);
1109 mutex_destroy(&zfsvfs
->z_lock
);
1110 list_destroy(&zfsvfs
->z_all_znodes
);
1111 rrm_destroy(&zfsvfs
->z_teardown_lock
);
1112 rw_destroy(&zfsvfs
->z_teardown_inactive_lock
);
1113 rw_destroy(&zfsvfs
->z_fuid_lock
);
1114 for (i
= 0; i
!= ZFS_OBJ_MTX_SZ
; i
++)
1115 mutex_destroy(&zfsvfs
->z_hold_mtx
[i
]);
1116 kmem_free(zfsvfs
, sizeof (zfsvfs_t
));
1120 zfs_set_fuid_feature(zfsvfs_t
*zfsvfs
)
1122 zfsvfs
->z_use_fuids
= USE_FUIDS(zfsvfs
->z_version
, zfsvfs
->z_os
);
1123 if (zfsvfs
->z_vfs
) {
1124 if (zfsvfs
->z_use_fuids
) {
1125 vfs_set_feature(zfsvfs
->z_vfs
, VFSFT_XVATTR
);
1126 vfs_set_feature(zfsvfs
->z_vfs
, VFSFT_SYSATTR_VIEWS
);
1127 vfs_set_feature(zfsvfs
->z_vfs
, VFSFT_ACEMASKONACCESS
);
1128 vfs_set_feature(zfsvfs
->z_vfs
, VFSFT_ACLONCREATE
);
1129 vfs_set_feature(zfsvfs
->z_vfs
, VFSFT_ACCESS_FILTER
);
1130 vfs_set_feature(zfsvfs
->z_vfs
, VFSFT_REPARSE
);
1132 vfs_clear_feature(zfsvfs
->z_vfs
, VFSFT_XVATTR
);
1133 vfs_clear_feature(zfsvfs
->z_vfs
, VFSFT_SYSATTR_VIEWS
);
1134 vfs_clear_feature(zfsvfs
->z_vfs
, VFSFT_ACEMASKONACCESS
);
1135 vfs_clear_feature(zfsvfs
->z_vfs
, VFSFT_ACLONCREATE
);
1136 vfs_clear_feature(zfsvfs
->z_vfs
, VFSFT_ACCESS_FILTER
);
1137 vfs_clear_feature(zfsvfs
->z_vfs
, VFSFT_REPARSE
);
1140 zfsvfs
->z_use_sa
= USE_SA(zfsvfs
->z_version
, zfsvfs
->z_os
);
1144 zfs_domount(vfs_t
*vfsp
, char *osname
)
1147 uint64_t recordsize
, fsid_guid
;
1154 error
= zfsvfs_create(osname
, &zfsvfs
);
1157 zfsvfs
->z_vfs
= vfsp
;
1159 /* Initialize the generic filesystem structure. */
1160 vfsp
->vfs_bcount
= 0;
1161 vfsp
->vfs_data
= NULL
;
1163 if (zfs_create_unique_device(&mount_dev
) == -1) {
1164 error
= SET_ERROR(ENODEV
);
1167 ASSERT(vfs_devismounted(mount_dev
) == 0);
1169 if (error
= dsl_prop_get_integer(osname
, "recordsize", &recordsize
,
1173 vfsp
->vfs_dev
= mount_dev
;
1174 vfsp
->vfs_fstype
= zfsfstype
;
1175 vfsp
->vfs_bsize
= recordsize
;
1176 vfsp
->vfs_flag
|= VFS_NOTRUNC
;
1177 vfsp
->vfs_data
= zfsvfs
;
1180 * The fsid is 64 bits, composed of an 8-bit fs type, which
1181 * separates our fsid from any other filesystem types, and a
1182 * 56-bit objset unique ID. The objset unique ID is unique to
1183 * all objsets open on this system, provided by unique_create().
1184 * The 8-bit fs type must be put in the low bits of fsid[1]
1185 * because that's where other Solaris filesystems put it.
1187 fsid_guid
= dmu_objset_fsid_guid(zfsvfs
->z_os
);
1188 ASSERT((fsid_guid
& ~((1ULL<<56)-1)) == 0);
1189 vfsp
->vfs_fsid
.val
[0] = fsid_guid
;
1190 vfsp
->vfs_fsid
.val
[1] = ((fsid_guid
>>32) << 8) |
1194 * Set features for file system.
1196 zfs_set_fuid_feature(zfsvfs
);
1197 if (zfsvfs
->z_case
== ZFS_CASE_INSENSITIVE
) {
1198 vfs_set_feature(vfsp
, VFSFT_DIRENTFLAGS
);
1199 vfs_set_feature(vfsp
, VFSFT_CASEINSENSITIVE
);
1200 vfs_set_feature(vfsp
, VFSFT_NOCASESENSITIVE
);
1201 } else if (zfsvfs
->z_case
== ZFS_CASE_MIXED
) {
1202 vfs_set_feature(vfsp
, VFSFT_DIRENTFLAGS
);
1203 vfs_set_feature(vfsp
, VFSFT_CASEINSENSITIVE
);
1205 vfs_set_feature(vfsp
, VFSFT_ZEROCOPY_SUPPORTED
);
1207 if (dmu_objset_is_snapshot(zfsvfs
->z_os
)) {
1210 atime_changed_cb(zfsvfs
, B_FALSE
);
1211 readonly_changed_cb(zfsvfs
, B_TRUE
);
1212 if (error
= dsl_prop_get_integer(osname
, "xattr", &pval
, NULL
))
1214 xattr_changed_cb(zfsvfs
, pval
);
1215 zfsvfs
->z_issnap
= B_TRUE
;
1216 zfsvfs
->z_os
->os_sync
= ZFS_SYNC_DISABLED
;
1218 mutex_enter(&zfsvfs
->z_os
->os_user_ptr_lock
);
1219 dmu_objset_set_user(zfsvfs
->z_os
, zfsvfs
);
1220 mutex_exit(&zfsvfs
->z_os
->os_user_ptr_lock
);
1222 error
= zfsvfs_setup(zfsvfs
, B_TRUE
);
1225 if (!zfsvfs
->z_issnap
)
1226 zfsctl_create(zfsvfs
);
1229 dmu_objset_disown(zfsvfs
->z_os
, zfsvfs
);
1230 zfsvfs_free(zfsvfs
);
1232 atomic_inc_32(&zfs_active_fs_count
);
1239 zfs_unregister_callbacks(zfsvfs_t
*zfsvfs
)
1241 objset_t
*os
= zfsvfs
->z_os
;
1243 if (!dmu_objset_is_snapshot(os
))
1244 dsl_prop_unregister_all(dmu_objset_ds(os
), zfsvfs
);
1248 * Convert a decimal digit string to a uint64_t integer.
1251 str_to_uint64(char *str
, uint64_t *objnum
)
1256 if (*str
< '0' || *str
> '9')
1257 return (SET_ERROR(EINVAL
));
1259 num
= num
*10 + *str
++ - '0';
1267 * The boot path passed from the boot loader is in the form of
1268 * "rootpool-name/root-filesystem-object-number'. Convert this
1269 * string to a dataset name: "rootpool-name/root-filesystem-name".
1272 zfs_parse_bootfs(char *bpath
, char *outpath
)
1278 if (*bpath
== 0 || *bpath
== '/')
1279 return (SET_ERROR(EINVAL
));
1281 (void) strcpy(outpath
, bpath
);
1283 slashp
= strchr(bpath
, '/');
1285 /* if no '/', just return the pool name */
1286 if (slashp
== NULL
) {
1290 /* if not a number, just return the root dataset name */
1291 if (str_to_uint64(slashp
+1, &objnum
)) {
1296 error
= dsl_dsobj_to_dsname(bpath
, objnum
, outpath
);
1303 * Check that the hex label string is appropriate for the dataset being
1304 * mounted into the global_zone proper.
1306 * Return an error if the hex label string is not default or
1307 * admin_low/admin_high. For admin_low labels, the corresponding
1308 * dataset must be readonly.
1311 zfs_check_global_label(const char *dsname
, const char *hexsl
)
1313 if (strcasecmp(hexsl
, ZFS_MLSLABEL_DEFAULT
) == 0)
1315 if (strcasecmp(hexsl
, ADMIN_HIGH
) == 0)
1317 if (strcasecmp(hexsl
, ADMIN_LOW
) == 0) {
1318 /* must be readonly */
1321 if (dsl_prop_get_integer(dsname
,
1322 zfs_prop_to_name(ZFS_PROP_READONLY
), &rdonly
, NULL
))
1323 return (SET_ERROR(EACCES
));
1324 return (rdonly
? 0 : EACCES
);
1326 return (SET_ERROR(EACCES
));
1330 * Determine whether the mount is allowed according to MAC check.
1331 * by comparing (where appropriate) label of the dataset against
1332 * the label of the zone being mounted into. If the dataset has
1333 * no label, create one.
1335 * Returns 0 if access allowed, error otherwise (e.g. EACCES)
1338 zfs_mount_label_policy(vfs_t
*vfsp
, char *osname
)
1341 zone_t
*mntzone
= NULL
;
1342 ts_label_t
*mnt_tsl
;
1345 char ds_hexsl
[MAXNAMELEN
];
1347 retv
= EACCES
; /* assume the worst */
1350 * Start by getting the dataset label if it exists.
1352 error
= dsl_prop_get(osname
, zfs_prop_to_name(ZFS_PROP_MLSLABEL
),
1353 1, sizeof (ds_hexsl
), &ds_hexsl
, NULL
);
1355 return (SET_ERROR(EACCES
));
1358 * If labeling is NOT enabled, then disallow the mount of datasets
1359 * which have a non-default label already. No other label checks
1362 if (!is_system_labeled()) {
1363 if (strcasecmp(ds_hexsl
, ZFS_MLSLABEL_DEFAULT
) == 0)
1365 return (SET_ERROR(EACCES
));
1369 * Get the label of the mountpoint. If mounting into the global
1370 * zone (i.e. mountpoint is not within an active zone and the
1371 * zoned property is off), the label must be default or
1372 * admin_low/admin_high only; no other checks are needed.
1374 mntzone
= zone_find_by_any_path(refstr_value(vfsp
->vfs_mntpt
), B_FALSE
);
1375 if (mntzone
->zone_id
== GLOBAL_ZONEID
) {
1380 if (dsl_prop_get_integer(osname
,
1381 zfs_prop_to_name(ZFS_PROP_ZONED
), &zoned
, NULL
))
1382 return (SET_ERROR(EACCES
));
1384 return (zfs_check_global_label(osname
, ds_hexsl
));
1387 * This is the case of a zone dataset being mounted
1388 * initially, before the zone has been fully created;
1389 * allow this mount into global zone.
1394 mnt_tsl
= mntzone
->zone_slabel
;
1395 ASSERT(mnt_tsl
!= NULL
);
1396 label_hold(mnt_tsl
);
1397 mnt_sl
= label2bslabel(mnt_tsl
);
1399 if (strcasecmp(ds_hexsl
, ZFS_MLSLABEL_DEFAULT
) == 0) {
1401 * The dataset doesn't have a real label, so fabricate one.
1405 if (l_to_str_internal(mnt_sl
, &str
) == 0 &&
1406 dsl_prop_set_string(osname
,
1407 zfs_prop_to_name(ZFS_PROP_MLSLABEL
),
1408 ZPROP_SRC_LOCAL
, str
) == 0)
1411 kmem_free(str
, strlen(str
) + 1);
1412 } else if (hexstr_to_label(ds_hexsl
, &ds_sl
) == 0) {
1414 * Now compare labels to complete the MAC check. If the
1415 * labels are equal then allow access. If the mountpoint
1416 * label dominates the dataset label, allow readonly access.
1417 * Otherwise, access is denied.
1419 if (blequal(mnt_sl
, &ds_sl
))
1421 else if (bldominates(mnt_sl
, &ds_sl
)) {
1422 vfs_setmntopt(vfsp
, MNTOPT_RO
, NULL
, 0);
1427 label_rele(mnt_tsl
);
1433 zfs_mountroot(vfs_t
*vfsp
, enum whymountroot why
)
1436 static int zfsrootdone
= 0;
1437 zfsvfs_t
*zfsvfs
= NULL
;
1446 * The filesystem that we mount as root is defined in the
1447 * boot property "zfs-bootfs" with a format of
1448 * "poolname/root-dataset-objnum".
1450 if (why
== ROOT_INIT
) {
1452 return (SET_ERROR(EBUSY
));
1454 * the process of doing a spa_load will require the
1455 * clock to be set before we could (for example) do
1456 * something better by looking at the timestamp on
1457 * an uberblock, so just set it to -1.
1461 if ((zfs_bootfs
= spa_get_bootprop("zfs-bootfs")) == NULL
) {
1462 cmn_err(CE_NOTE
, "spa_get_bootfs: can not get "
1464 return (SET_ERROR(EINVAL
));
1466 zfs_devid
= spa_get_bootprop("diskdevid");
1467 error
= spa_import_rootpool(rootfs
.bo_name
, zfs_devid
);
1469 spa_free_bootprop(zfs_devid
);
1471 spa_free_bootprop(zfs_bootfs
);
1472 cmn_err(CE_NOTE
, "spa_import_rootpool: error %d",
1476 if (error
= zfs_parse_bootfs(zfs_bootfs
, rootfs
.bo_name
)) {
1477 spa_free_bootprop(zfs_bootfs
);
1478 cmn_err(CE_NOTE
, "zfs_parse_bootfs: error %d",
1483 spa_free_bootprop(zfs_bootfs
);
1485 if (error
= vfs_lock(vfsp
))
1488 if (error
= zfs_domount(vfsp
, rootfs
.bo_name
)) {
1489 cmn_err(CE_NOTE
, "zfs_domount: error %d", error
);
1493 zfsvfs
= (zfsvfs_t
*)vfsp
->vfs_data
;
1495 if (error
= zfs_zget(zfsvfs
, zfsvfs
->z_root
, &zp
)) {
1496 cmn_err(CE_NOTE
, "zfs_zget: error %d", error
);
1501 mutex_enter(&vp
->v_lock
);
1502 vp
->v_flag
|= VROOT
;
1503 mutex_exit(&vp
->v_lock
);
1507 * Leave rootvp held. The root file system is never unmounted.
1510 vfs_add((struct vnode
*)0, vfsp
,
1511 (vfsp
->vfs_flag
& VFS_RDONLY
) ? MS_RDONLY
: 0);
1515 } else if (why
== ROOT_REMOUNT
) {
1516 readonly_changed_cb(vfsp
->vfs_data
, B_FALSE
);
1517 vfsp
->vfs_flag
|= VFS_REMOUNT
;
1519 /* refresh mount options */
1520 zfs_unregister_callbacks(vfsp
->vfs_data
);
1521 return (zfs_register_callbacks(vfsp
));
1523 } else if (why
== ROOT_UNMOUNT
) {
1524 zfs_unregister_callbacks((zfsvfs_t
*)vfsp
->vfs_data
);
1525 (void) zfs_sync(vfsp
, 0, 0);
1530 * if "why" is equal to anything else other than ROOT_INIT,
1531 * ROOT_REMOUNT, or ROOT_UNMOUNT, we do not support it.
1533 return (SET_ERROR(ENOTSUP
));
1538 zfs_mount(vfs_t
*vfsp
, vnode_t
*mvp
, struct mounta
*uap
, cred_t
*cr
)
1543 uio_seg_t fromspace
= (uap
->flags
& MS_SYSSPACE
) ?
1544 UIO_SYSSPACE
: UIO_USERSPACE
;
1547 if (mvp
->v_type
!= VDIR
)
1548 return (SET_ERROR(ENOTDIR
));
1550 mutex_enter(&mvp
->v_lock
);
1551 if ((uap
->flags
& MS_REMOUNT
) == 0 &&
1552 (uap
->flags
& MS_OVERLAY
) == 0 &&
1553 (mvp
->v_count
!= 1 || (mvp
->v_flag
& VROOT
))) {
1554 mutex_exit(&mvp
->v_lock
);
1555 return (SET_ERROR(EBUSY
));
1557 mutex_exit(&mvp
->v_lock
);
1560 * ZFS does not support passing unparsed data in via MS_DATA.
1561 * Users should use the MS_OPTIONSTR interface; this means
1562 * that all option parsing is already done and the options struct
1563 * can be interrogated.
1565 if ((uap
->flags
& MS_DATA
) && uap
->datalen
> 0)
1566 return (SET_ERROR(EINVAL
));
1569 * Get the objset name (the "special" mount argument).
1571 if (error
= pn_get(uap
->spec
, fromspace
, &spn
))
1574 osname
= spn
.pn_path
;
1577 * Check for mount privilege?
1579 * If we don't have privilege then see if
1580 * we have local permission to allow it
1582 error
= secpolicy_fs_mount(cr
, mvp
, vfsp
);
1584 if (dsl_deleg_access(osname
, ZFS_DELEG_PERM_MOUNT
, cr
) == 0) {
1588 * Make sure user is the owner of the mount point
1589 * or has sufficient privileges.
1592 vattr
.va_mask
= AT_UID
;
1594 if (VOP_GETATTR(mvp
, &vattr
, 0, cr
, NULL
)) {
1598 if (secpolicy_vnode_owner(cr
, vattr
.va_uid
) != 0 &&
1599 VOP_ACCESS(mvp
, VWRITE
, 0, cr
, NULL
) != 0) {
1602 secpolicy_fs_mount_clearopts(cr
, vfsp
);
1609 * Refuse to mount a filesystem if we are in a local zone and the
1610 * dataset is not visible.
1612 if (!INGLOBALZONE(curproc
) &&
1613 (!zone_dataset_visible(osname
, &canwrite
) || !canwrite
)) {
1614 error
= SET_ERROR(EPERM
);
1618 error
= zfs_mount_label_policy(vfsp
, osname
);
1623 * When doing a remount, we simply refresh our temporary properties
1624 * according to those options set in the current VFS options.
1626 if (uap
->flags
& MS_REMOUNT
) {
1627 /* refresh mount options */
1628 zfs_unregister_callbacks(vfsp
->vfs_data
);
1629 error
= zfs_register_callbacks(vfsp
);
1633 error
= zfs_domount(vfsp
, osname
);
1636 * Add an extra VFS_HOLD on our parent vfs so that it can't
1637 * disappear due to a forced unmount.
1639 if (error
== 0 && ((zfsvfs_t
*)vfsp
->vfs_data
)->z_issnap
)
1640 VFS_HOLD(mvp
->v_vfsp
);
1648 zfs_statvfs(vfs_t
*vfsp
, struct statvfs64
*statp
)
1650 zfsvfs_t
*zfsvfs
= vfsp
->vfs_data
;
1652 uint64_t refdbytes
, availbytes
, usedobjs
, availobjs
;
1656 dmu_objset_space(zfsvfs
->z_os
,
1657 &refdbytes
, &availbytes
, &usedobjs
, &availobjs
);
1660 * The underlying storage pool actually uses multiple block sizes.
1661 * We report the fragsize as the smallest block size we support,
1662 * and we report our blocksize as the filesystem's maximum blocksize.
1664 statp
->f_frsize
= 1UL << SPA_MINBLOCKSHIFT
;
1665 statp
->f_bsize
= zfsvfs
->z_max_blksz
;
1668 * The following report "total" blocks of various kinds in the
1669 * file system, but reported in terms of f_frsize - the
1673 statp
->f_blocks
= (refdbytes
+ availbytes
) >> SPA_MINBLOCKSHIFT
;
1674 statp
->f_bfree
= availbytes
>> SPA_MINBLOCKSHIFT
;
1675 statp
->f_bavail
= statp
->f_bfree
; /* no root reservation */
1678 * statvfs() should really be called statufs(), because it assumes
1679 * static metadata. ZFS doesn't preallocate files, so the best
1680 * we can do is report the max that could possibly fit in f_files,
1681 * and that minus the number actually used in f_ffree.
1682 * For f_ffree, report the smaller of the number of object available
1683 * and the number of blocks (each object will take at least a block).
1685 statp
->f_ffree
= MIN(availobjs
, statp
->f_bfree
);
1686 statp
->f_favail
= statp
->f_ffree
; /* no "root reservation" */
1687 statp
->f_files
= statp
->f_ffree
+ usedobjs
;
1689 (void) cmpldev(&d32
, vfsp
->vfs_dev
);
1690 statp
->f_fsid
= d32
;
1693 * We're a zfs filesystem.
1695 (void) strcpy(statp
->f_basetype
, vfssw
[vfsp
->vfs_fstype
].vsw_name
);
1697 statp
->f_flag
= vf_to_stf(vfsp
->vfs_flag
);
1699 statp
->f_namemax
= ZFS_MAXNAMELEN
;
1702 * We have all of 32 characters to stuff a string here.
1703 * Is there anything useful we could/should provide?
1705 bzero(statp
->f_fstr
, sizeof (statp
->f_fstr
));
1712 zfs_root(vfs_t
*vfsp
, vnode_t
**vpp
)
1714 zfsvfs_t
*zfsvfs
= vfsp
->vfs_data
;
1720 error
= zfs_zget(zfsvfs
, zfsvfs
->z_root
, &rootzp
);
1722 *vpp
= ZTOV(rootzp
);
1729 * Teardown the zfsvfs::z_os.
1731 * Note, if 'unmounting' if FALSE, we return with the 'z_teardown_lock'
1732 * and 'z_teardown_inactive_lock' held.
1735 zfsvfs_teardown(zfsvfs_t
*zfsvfs
, boolean_t unmounting
)
1739 rrm_enter(&zfsvfs
->z_teardown_lock
, RW_WRITER
, FTAG
);
1743 * We purge the parent filesystem's vfsp as the parent
1744 * filesystem and all of its snapshots have their vnode's
1745 * v_vfsp set to the parent's filesystem's vfsp. Note,
1746 * 'z_parent' is self referential for non-snapshots.
1748 (void) dnlc_purge_vfsp(zfsvfs
->z_parent
->z_vfs
, 0);
1752 * Close the zil. NB: Can't close the zil while zfs_inactive
1753 * threads are blocked as zil_close can call zfs_inactive.
1755 if (zfsvfs
->z_log
) {
1756 zil_close(zfsvfs
->z_log
);
1757 zfsvfs
->z_log
= NULL
;
1760 rw_enter(&zfsvfs
->z_teardown_inactive_lock
, RW_WRITER
);
1763 * If we are not unmounting (ie: online recv) and someone already
1764 * unmounted this file system while we were doing the switcheroo,
1765 * or a reopen of z_os failed then just bail out now.
1767 if (!unmounting
&& (zfsvfs
->z_unmounted
|| zfsvfs
->z_os
== NULL
)) {
1768 rw_exit(&zfsvfs
->z_teardown_inactive_lock
);
1769 rrm_exit(&zfsvfs
->z_teardown_lock
, FTAG
);
1770 return (SET_ERROR(EIO
));
1774 * At this point there are no vops active, and any new vops will
1775 * fail with EIO since we have z_teardown_lock for writer (only
1776 * relavent for forced unmount).
1778 * Release all holds on dbufs.
1780 mutex_enter(&zfsvfs
->z_znodes_lock
);
1781 for (zp
= list_head(&zfsvfs
->z_all_znodes
); zp
!= NULL
;
1782 zp
= list_next(&zfsvfs
->z_all_znodes
, zp
))
1784 ASSERT(ZTOV(zp
)->v_count
> 0);
1785 zfs_znode_dmu_fini(zp
);
1787 mutex_exit(&zfsvfs
->z_znodes_lock
);
1790 * If we are unmounting, set the unmounted flag and let new vops
1791 * unblock. zfs_inactive will have the unmounted behavior, and all
1792 * other vops will fail with EIO.
1795 zfsvfs
->z_unmounted
= B_TRUE
;
1796 rrm_exit(&zfsvfs
->z_teardown_lock
, FTAG
);
1797 rw_exit(&zfsvfs
->z_teardown_inactive_lock
);
1801 * z_os will be NULL if there was an error in attempting to reopen
1802 * zfsvfs, so just return as the properties had already been
1803 * unregistered and cached data had been evicted before.
1805 if (zfsvfs
->z_os
== NULL
)
1809 * Unregister properties.
1811 zfs_unregister_callbacks(zfsvfs
);
1816 if (dsl_dataset_is_dirty(dmu_objset_ds(zfsvfs
->z_os
)) &&
1817 !(zfsvfs
->z_vfs
->vfs_flag
& VFS_RDONLY
))
1818 txg_wait_synced(dmu_objset_pool(zfsvfs
->z_os
), 0);
1819 dmu_objset_evict_dbufs(zfsvfs
->z_os
);
1826 zfs_umount(vfs_t
*vfsp
, int fflag
, cred_t
*cr
)
1828 zfsvfs_t
*zfsvfs
= vfsp
->vfs_data
;
1832 ret
= secpolicy_fs_unmount(cr
, vfsp
);
1834 if (dsl_deleg_access((char *)refstr_value(vfsp
->vfs_resource
),
1835 ZFS_DELEG_PERM_MOUNT
, cr
))
1840 * We purge the parent filesystem's vfsp as the parent filesystem
1841 * and all of its snapshots have their vnode's v_vfsp set to the
1842 * parent's filesystem's vfsp. Note, 'z_parent' is self
1843 * referential for non-snapshots.
1845 (void) dnlc_purge_vfsp(zfsvfs
->z_parent
->z_vfs
, 0);
1848 * Unmount any snapshots mounted under .zfs before unmounting the
1851 if (zfsvfs
->z_ctldir
!= NULL
&&
1852 (ret
= zfsctl_umount_snapshots(vfsp
, fflag
, cr
)) != 0) {
1856 if (!(fflag
& MS_FORCE
)) {
1858 * Check the number of active vnodes in the file system.
1859 * Our count is maintained in the vfs structure, but the
1860 * number is off by 1 to indicate a hold on the vfs
1863 * The '.zfs' directory maintains a reference of its
1864 * own, and any active references underneath are
1865 * reflected in the vnode count.
1867 if (zfsvfs
->z_ctldir
== NULL
) {
1868 if (vfsp
->vfs_count
> 1)
1869 return (SET_ERROR(EBUSY
));
1871 if (vfsp
->vfs_count
> 2 ||
1872 zfsvfs
->z_ctldir
->v_count
> 1)
1873 return (SET_ERROR(EBUSY
));
1877 vfsp
->vfs_flag
|= VFS_UNMOUNTED
;
1879 VERIFY(zfsvfs_teardown(zfsvfs
, B_TRUE
) == 0);
1883 * z_os will be NULL if there was an error in
1884 * attempting to reopen zfsvfs.
1888 * Unset the objset user_ptr.
1890 mutex_enter(&os
->os_user_ptr_lock
);
1891 dmu_objset_set_user(os
, NULL
);
1892 mutex_exit(&os
->os_user_ptr_lock
);
1895 * Finally release the objset
1897 dmu_objset_disown(os
, zfsvfs
);
1901 * We can now safely destroy the '.zfs' directory node.
1903 if (zfsvfs
->z_ctldir
!= NULL
)
1904 zfsctl_destroy(zfsvfs
);
1910 zfs_vget(vfs_t
*vfsp
, vnode_t
**vpp
, fid_t
*fidp
)
1912 zfsvfs_t
*zfsvfs
= vfsp
->vfs_data
;
1914 uint64_t object
= 0;
1915 uint64_t fid_gen
= 0;
1924 if (fidp
->fid_len
== LONG_FID_LEN
) {
1925 zfid_long_t
*zlfid
= (zfid_long_t
*)fidp
;
1926 uint64_t objsetid
= 0;
1927 uint64_t setgen
= 0;
1929 for (i
= 0; i
< sizeof (zlfid
->zf_setid
); i
++)
1930 objsetid
|= ((uint64_t)zlfid
->zf_setid
[i
]) << (8 * i
);
1932 for (i
= 0; i
< sizeof (zlfid
->zf_setgen
); i
++)
1933 setgen
|= ((uint64_t)zlfid
->zf_setgen
[i
]) << (8 * i
);
1937 err
= zfsctl_lookup_objset(vfsp
, objsetid
, &zfsvfs
);
1939 return (SET_ERROR(EINVAL
));
1943 if (fidp
->fid_len
== SHORT_FID_LEN
|| fidp
->fid_len
== LONG_FID_LEN
) {
1944 zfid_short_t
*zfid
= (zfid_short_t
*)fidp
;
1946 for (i
= 0; i
< sizeof (zfid
->zf_object
); i
++)
1947 object
|= ((uint64_t)zfid
->zf_object
[i
]) << (8 * i
);
1949 for (i
= 0; i
< sizeof (zfid
->zf_gen
); i
++)
1950 fid_gen
|= ((uint64_t)zfid
->zf_gen
[i
]) << (8 * i
);
1953 return (SET_ERROR(EINVAL
));
1956 /* A zero fid_gen means we are in the .zfs control directories */
1958 (object
== ZFSCTL_INO_ROOT
|| object
== ZFSCTL_INO_SNAPDIR
)) {
1959 *vpp
= zfsvfs
->z_ctldir
;
1960 ASSERT(*vpp
!= NULL
);
1961 if (object
== ZFSCTL_INO_SNAPDIR
) {
1962 VERIFY(zfsctl_root_lookup(*vpp
, "snapshot", vpp
, NULL
,
1963 0, NULL
, NULL
, NULL
, NULL
, NULL
) == 0);
1971 gen_mask
= -1ULL >> (64 - 8 * i
);
1973 dprintf("getting %llu [%u mask %llx]\n", object
, fid_gen
, gen_mask
);
1974 if (err
= zfs_zget(zfsvfs
, object
, &zp
)) {
1978 (void) sa_lookup(zp
->z_sa_hdl
, SA_ZPL_GEN(zfsvfs
), &zp_gen
,
1980 zp_gen
= zp_gen
& gen_mask
;
1983 if (zp
->z_unlinked
|| zp_gen
!= fid_gen
) {
1984 dprintf("znode gen (%u) != fid gen (%u)\n", zp_gen
, fid_gen
);
1987 return (SET_ERROR(EINVAL
));
1996 * Block out VOPs and close zfsvfs_t::z_os
1998 * Note, if successful, then we return with the 'z_teardown_lock' and
1999 * 'z_teardown_inactive_lock' write held. We leave ownership of the underlying
2000 * dataset and objset intact so that they can be atomically handed off during
2001 * a subsequent rollback or recv operation and the resume thereafter.
2004 zfs_suspend_fs(zfsvfs_t
*zfsvfs
)
2008 if ((error
= zfsvfs_teardown(zfsvfs
, B_FALSE
)) != 0)
2015 * Rebuild SA and release VOPs. Note that ownership of the underlying dataset
2016 * is an invariant across any of the operations that can be performed while the
2017 * filesystem was suspended. Whether it succeeded or failed, the preconditions
2018 * are the same: the relevant objset and associated dataset are owned by
2019 * zfsvfs, held, and long held on entry.
2022 zfs_resume_fs(zfsvfs_t
*zfsvfs
, const char *osname
)
2027 ASSERT(RRM_WRITE_HELD(&zfsvfs
->z_teardown_lock
));
2028 ASSERT(RW_WRITE_HELD(&zfsvfs
->z_teardown_inactive_lock
));
2031 * We already own this, so just hold and rele it to update the
2032 * objset_t, as the one we had before may have been evicted.
2035 VERIFY0(dmu_objset_hold(osname
, zfsvfs
, &os
));
2036 VERIFY3P(os
->os_dsl_dataset
->ds_owner
, ==, zfsvfs
);
2037 VERIFY(dsl_dataset_long_held(os
->os_dsl_dataset
));
2038 dmu_objset_rele(os
, zfsvfs
);
2040 err
= zfsvfs_init(zfsvfs
, os
);
2044 VERIFY(zfsvfs_setup(zfsvfs
, B_FALSE
) == 0);
2046 zfs_set_fuid_feature(zfsvfs
);
2049 * Attempt to re-establish all the active znodes with
2050 * their dbufs. If a zfs_rezget() fails, then we'll let
2051 * any potential callers discover that via ZFS_ENTER_VERIFY_VP
2052 * when they try to use their znode.
2054 mutex_enter(&zfsvfs
->z_znodes_lock
);
2055 for (zp
= list_head(&zfsvfs
->z_all_znodes
); zp
;
2056 zp
= list_next(&zfsvfs
->z_all_znodes
, zp
)) {
2057 (void) zfs_rezget(zp
);
2059 mutex_exit(&zfsvfs
->z_znodes_lock
);
2062 /* release the VOPs */
2063 rw_exit(&zfsvfs
->z_teardown_inactive_lock
);
2064 rrm_exit(&zfsvfs
->z_teardown_lock
, FTAG
);
2068 * Since we couldn't setup the sa framework, try to force
2069 * unmount this file system.
2071 if (vn_vfswlock(zfsvfs
->z_vfs
->vfs_vnodecovered
) == 0)
2072 (void) dounmount(zfsvfs
->z_vfs
, MS_FORCE
, CRED());
2078 zfs_freevfs(vfs_t
*vfsp
)
2080 zfsvfs_t
*zfsvfs
= vfsp
->vfs_data
;
2083 * If this is a snapshot, we have an extra VFS_HOLD on our parent
2084 * from zfs_mount(). Release it here. If we came through
2085 * zfs_mountroot() instead, we didn't grab an extra hold, so
2086 * skip the VFS_RELE for rootvfs.
2088 if (zfsvfs
->z_issnap
&& (vfsp
!= rootvfs
))
2089 VFS_RELE(zfsvfs
->z_parent
->z_vfs
);
2091 zfsvfs_free(zfsvfs
);
2093 atomic_dec_32(&zfs_active_fs_count
);
2097 * VFS_INIT() initialization. Note that there is no VFS_FINI(),
2098 * so we can't safely do any non-idempotent initialization here.
2099 * Leave that to zfs_init() and zfs_fini(), which are called
2100 * from the module's _init() and _fini() entry points.
2104 zfs_vfsinit(int fstype
, char *name
)
2111 * Setup vfsops and vnodeops tables.
2113 error
= vfs_setfsops(fstype
, zfs_vfsops_template
, &zfs_vfsops
);
2115 cmn_err(CE_WARN
, "zfs: bad vfs ops template");
2118 error
= zfs_create_op_tables();
2120 zfs_remove_op_tables();
2121 cmn_err(CE_WARN
, "zfs: bad vnode ops template");
2122 (void) vfs_freevfsops_by_type(zfsfstype
);
2126 mutex_init(&zfs_dev_mtx
, NULL
, MUTEX_DEFAULT
, NULL
);
2129 * Unique major number for all zfs mounts.
2130 * If we run out of 32-bit minors, we'll getudev() another major.
2132 zfs_major
= ddi_name_to_major(ZFS_DRIVER
);
2133 zfs_minor
= ZFS_MIN_MINOR
;
2142 * Initialize .zfs directory structures
2147 * Initialize znode cache, vnode ops, etc...
2151 dmu_objset_register_type(DMU_OST_ZFS
, zfs_space_delta_cb
);
2164 return (zfs_active_fs_count
!= 0);
2168 zfs_set_version(zfsvfs_t
*zfsvfs
, uint64_t newvers
)
2171 objset_t
*os
= zfsvfs
->z_os
;
2174 if (newvers
< ZPL_VERSION_INITIAL
|| newvers
> ZPL_VERSION
)
2175 return (SET_ERROR(EINVAL
));
2177 if (newvers
< zfsvfs
->z_version
)
2178 return (SET_ERROR(EINVAL
));
2180 if (zfs_spa_version_map(newvers
) >
2181 spa_version(dmu_objset_spa(zfsvfs
->z_os
)))
2182 return (SET_ERROR(ENOTSUP
));
2184 tx
= dmu_tx_create(os
);
2185 dmu_tx_hold_zap(tx
, MASTER_NODE_OBJ
, B_FALSE
, ZPL_VERSION_STR
);
2186 if (newvers
>= ZPL_VERSION_SA
&& !zfsvfs
->z_use_sa
) {
2187 dmu_tx_hold_zap(tx
, MASTER_NODE_OBJ
, B_TRUE
,
2189 dmu_tx_hold_zap(tx
, DMU_NEW_OBJECT
, FALSE
, NULL
);
2191 error
= dmu_tx_assign(tx
, TXG_WAIT
);
2197 error
= zap_update(os
, MASTER_NODE_OBJ
, ZPL_VERSION_STR
,
2198 8, 1, &newvers
, tx
);
2205 if (newvers
>= ZPL_VERSION_SA
&& !zfsvfs
->z_use_sa
) {
2208 ASSERT3U(spa_version(dmu_objset_spa(zfsvfs
->z_os
)), >=,
2210 sa_obj
= zap_create(os
, DMU_OT_SA_MASTER_NODE
,
2211 DMU_OT_NONE
, 0, tx
);
2213 error
= zap_add(os
, MASTER_NODE_OBJ
,
2214 ZFS_SA_ATTRS
, 8, 1, &sa_obj
, tx
);
2217 VERIFY(0 == sa_set_sa_object(os
, sa_obj
));
2218 sa_register_update_callback(os
, zfs_sa_upgrade
);
2221 spa_history_log_internal_ds(dmu_objset_ds(os
), "upgrade", tx
,
2222 "from %llu to %llu", zfsvfs
->z_version
, newvers
);
2226 zfsvfs
->z_version
= newvers
;
2228 zfs_set_fuid_feature(zfsvfs
);
2234 * Read a property stored within the master node.
2237 zfs_get_zplprop(objset_t
*os
, zfs_prop_t prop
, uint64_t *value
)
2243 * Look up the file system's value for the property. For the
2244 * version property, we look up a slightly different string.
2246 if (prop
== ZFS_PROP_VERSION
)
2247 pname
= ZPL_VERSION_STR
;
2249 pname
= zfs_prop_to_name(prop
);
2252 error
= zap_lookup(os
, MASTER_NODE_OBJ
, pname
, 8, 1, value
);
2254 if (error
== ENOENT
) {
2255 /* No value set, use the default value */
2257 case ZFS_PROP_VERSION
:
2258 *value
= ZPL_VERSION
;
2260 case ZFS_PROP_NORMALIZE
:
2261 case ZFS_PROP_UTF8ONLY
:
2265 *value
= ZFS_CASE_SENSITIVE
;
2275 static vfsdef_t vfw
= {
2279 VSW_HASPROTO
|VSW_CANRWRO
|VSW_CANREMOUNT
|VSW_VOLATILEDEV
|VSW_STATS
|
2284 struct modlfs zfs_modlfs
= {
2285 &mod_fsops
, "ZFS filesystem version " SPA_VERSION_STRING
, &vfw