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 2009 Sun Microsystems, Inc. All rights reserved.
23 * Use is subject to license terms.
26 /* Portions Copyright 2007 Jeremy Teo */
29 #include <sys/types.h>
30 #include <sys/param.h>
32 #include <sys/systm.h>
33 #include <sys/sysmacros.h>
34 #include <sys/resource.h>
35 #include <sys/mntent.h>
36 #include <sys/mkdev.h>
37 #include <sys/u8_textprep.h>
38 #include <sys/dsl_dataset.h>
40 #include <sys/vfs_opreg.h>
41 #include <sys/vnode.h>
44 #include <sys/errno.h>
45 #include <sys/unistd.h>
47 #include <sys/atomic.h>
49 #include "fs/fs_subr.h"
50 #include <sys/zfs_dir.h>
51 #include <sys/zfs_acl.h>
52 #include <sys/zfs_ioctl.h>
53 #include <sys/zfs_rlock.h>
54 #include <sys/zfs_fuid.h>
55 #include <sys/fs/zfs.h>
56 #include <sys/kidmap.h>
60 #include <sys/refcount.h>
63 #include <sys/zfs_znode.h>
68 * Define ZNODE_STATS to turn on statistic gathering. By default, it is only
69 * turned on when DEBUG is also defined.
76 #define ZNODE_STAT_ADD(stat) ((stat)++)
78 #define ZNODE_STAT_ADD(stat) /* nothing */
79 #endif /* ZNODE_STATS */
81 #define POINTER_IS_VALID(p) (!((uintptr_t)(p) & 0x3))
82 #define POINTER_INVALIDATE(pp) (*(pp) = (void *)((uintptr_t)(*(pp)) | 0x1))
85 * Functions needed for userland (ie: libzpool) are not put under
86 * #ifdef_KERNEL; the rest of the functions have dependencies
87 * (such as VFS logic) that will not compile easily in userland.
90 static kmem_cache_t
*znode_cache
= NULL
;
94 znode_evict_error(dmu_buf_t
*dbuf
, void *user_ptr
)
97 * We should never drop all dbuf refs without first clearing
98 * the eviction callback.
100 panic("evicting znode %p\n", user_ptr
);
105 zfs_znode_cache_constructor(void *buf
, void *arg
, int kmflags
)
109 ASSERT(!POINTER_IS_VALID(zp
->z_zfsvfs
));
111 zp
->z_vnode
= vn_alloc(kmflags
);
112 if (zp
->z_vnode
== NULL
) {
115 ZTOV(zp
)->v_data
= zp
;
117 list_link_init(&zp
->z_link_node
);
119 mutex_init(&zp
->z_lock
, NULL
, MUTEX_DEFAULT
, NULL
);
120 rw_init(&zp
->z_parent_lock
, NULL
, RW_DEFAULT
, NULL
);
121 rw_init(&zp
->z_name_lock
, NULL
, RW_DEFAULT
, NULL
);
122 mutex_init(&zp
->z_acl_lock
, NULL
, MUTEX_DEFAULT
, NULL
);
124 mutex_init(&zp
->z_range_lock
, NULL
, MUTEX_DEFAULT
, NULL
);
125 avl_create(&zp
->z_range_avl
, zfs_range_compare
,
126 sizeof (rl_t
), offsetof(rl_t
, r_node
));
129 zp
->z_dirlocks
= NULL
;
135 zfs_znode_cache_destructor(void *buf
, void *arg
)
139 ASSERT(!POINTER_IS_VALID(zp
->z_zfsvfs
));
140 ASSERT(ZTOV(zp
)->v_data
== zp
);
142 ASSERT(!list_link_active(&zp
->z_link_node
));
143 mutex_destroy(&zp
->z_lock
);
144 rw_destroy(&zp
->z_parent_lock
);
145 rw_destroy(&zp
->z_name_lock
);
146 mutex_destroy(&zp
->z_acl_lock
);
147 avl_destroy(&zp
->z_range_avl
);
148 mutex_destroy(&zp
->z_range_lock
);
150 ASSERT(zp
->z_dbuf
== NULL
);
151 ASSERT(zp
->z_dirlocks
== NULL
);
156 uint64_t zms_zfsvfs_invalid
;
157 uint64_t zms_zfsvfs_unmounted
;
158 uint64_t zms_zfsvfs_recheck_invalid
;
159 uint64_t zms_obj_held
;
160 uint64_t zms_vnode_locked
;
161 uint64_t zms_not_only_dnlc
;
163 #endif /* ZNODE_STATS */
166 zfs_znode_move_impl(znode_t
*ozp
, znode_t
*nzp
)
171 nzp
->z_zfsvfs
= ozp
->z_zfsvfs
;
175 nzp
->z_vnode
= ozp
->z_vnode
;
176 ozp
->z_vnode
= vp
; /* let destructor free the overwritten vnode */
177 ZTOV(ozp
)->v_data
= ozp
;
178 ZTOV(nzp
)->v_data
= nzp
;
180 nzp
->z_id
= ozp
->z_id
;
181 ASSERT(ozp
->z_dirlocks
== NULL
); /* znode not in use */
182 ASSERT(avl_numnodes(&ozp
->z_range_avl
) == 0);
183 nzp
->z_unlinked
= ozp
->z_unlinked
;
184 nzp
->z_atime_dirty
= ozp
->z_atime_dirty
;
185 nzp
->z_zn_prefetch
= ozp
->z_zn_prefetch
;
186 nzp
->z_blksz
= ozp
->z_blksz
;
187 nzp
->z_seq
= ozp
->z_seq
;
188 nzp
->z_mapcnt
= ozp
->z_mapcnt
;
189 nzp
->z_last_itx
= ozp
->z_last_itx
;
190 nzp
->z_gen
= ozp
->z_gen
;
191 nzp
->z_sync_cnt
= ozp
->z_sync_cnt
;
192 nzp
->z_phys
= ozp
->z_phys
;
193 nzp
->z_dbuf
= ozp
->z_dbuf
;
195 /* Update back pointers. */
196 (void) dmu_buf_update_user(nzp
->z_dbuf
, ozp
, nzp
, &nzp
->z_phys
,
200 * Invalidate the original znode by clearing fields that provide a
201 * pointer back to the znode. Set the low bit of the vfs pointer to
202 * ensure that zfs_znode_move() recognizes the znode as invalid in any
203 * subsequent callback.
206 POINTER_INVALIDATE(&ozp
->z_zfsvfs
);
210 * Wrapper function for ZFS_ENTER that returns 0 if successful and otherwise
211 * returns a non-zero error code.
214 zfs_enter(zfsvfs_t
*zfsvfs
)
222 zfs_znode_move(void *buf
, void *newbuf
, size_t size
, void *arg
)
224 znode_t
*ozp
= buf
, *nzp
= newbuf
;
229 * The znode is on the file system's list of known znodes if the vfs
230 * pointer is valid. We set the low bit of the vfs pointer when freeing
231 * the znode to invalidate it, and the memory patterns written by kmem
232 * (baddcafe and deadbeef) set at least one of the two low bits. A newly
233 * created znode sets the vfs pointer last of all to indicate that the
234 * znode is known and in a valid state to be moved by this function.
236 zfsvfs
= ozp
->z_zfsvfs
;
237 if (!POINTER_IS_VALID(zfsvfs
)) {
238 ZNODE_STAT_ADD(znode_move_stats
.zms_zfsvfs_invalid
);
239 return (KMEM_CBRC_DONT_KNOW
);
243 * Ensure that the filesystem is not unmounted during the move.
245 if (zfs_enter(zfsvfs
) != 0) { /* ZFS_ENTER */
246 ZNODE_STAT_ADD(znode_move_stats
.zms_zfsvfs_unmounted
);
247 return (KMEM_CBRC_DONT_KNOW
);
250 mutex_enter(&zfsvfs
->z_znodes_lock
);
252 * Recheck the vfs pointer in case the znode was removed just before
253 * acquiring the lock.
255 if (zfsvfs
!= ozp
->z_zfsvfs
) {
256 mutex_exit(&zfsvfs
->z_znodes_lock
);
258 ZNODE_STAT_ADD(znode_move_stats
.zms_zfsvfs_recheck_invalid
);
259 return (KMEM_CBRC_DONT_KNOW
);
263 * At this point we know that as long as we hold z_znodes_lock, the
264 * znode cannot be freed and fields within the znode can be safely
265 * accessed. Now, prevent a race with zfs_zget().
267 if (ZFS_OBJ_HOLD_TRYENTER(zfsvfs
, ozp
->z_id
) == 0) {
268 mutex_exit(&zfsvfs
->z_znodes_lock
);
270 ZNODE_STAT_ADD(znode_move_stats
.zms_obj_held
);
271 return (KMEM_CBRC_LATER
);
275 if (mutex_tryenter(&vp
->v_lock
) == 0) {
276 ZFS_OBJ_HOLD_EXIT(zfsvfs
, ozp
->z_id
);
277 mutex_exit(&zfsvfs
->z_znodes_lock
);
279 ZNODE_STAT_ADD(znode_move_stats
.zms_vnode_locked
);
280 return (KMEM_CBRC_LATER
);
283 /* Only move znodes that are referenced _only_ by the DNLC. */
284 if (vp
->v_count
!= 1 || !vn_in_dnlc(vp
)) {
285 mutex_exit(&vp
->v_lock
);
286 ZFS_OBJ_HOLD_EXIT(zfsvfs
, ozp
->z_id
);
287 mutex_exit(&zfsvfs
->z_znodes_lock
);
289 ZNODE_STAT_ADD(znode_move_stats
.zms_not_only_dnlc
);
290 return (KMEM_CBRC_LATER
);
294 * The znode is known and in a valid state to move. We're holding the
295 * locks needed to execute the critical section.
297 zfs_znode_move_impl(ozp
, nzp
);
298 mutex_exit(&vp
->v_lock
);
299 ZFS_OBJ_HOLD_EXIT(zfsvfs
, ozp
->z_id
);
301 list_link_replace(&ozp
->z_link_node
, &nzp
->z_link_node
);
302 mutex_exit(&zfsvfs
->z_znodes_lock
);
305 return (KMEM_CBRC_YES
);
314 ASSERT(znode_cache
== NULL
);
315 znode_cache
= kmem_cache_create("zfs_znode_cache",
316 sizeof (znode_t
), 0, zfs_znode_cache_constructor
,
317 zfs_znode_cache_destructor
, NULL
, NULL
, NULL
, 0);
318 kmem_cache_set_move(znode_cache
, zfs_znode_move
);
325 * Cleanup vfs & vnode ops
327 zfs_remove_op_tables();
333 kmem_cache_destroy(znode_cache
);
337 struct vnodeops
*zfs_dvnodeops
;
338 struct vnodeops
*zfs_fvnodeops
;
339 struct vnodeops
*zfs_symvnodeops
;
340 struct vnodeops
*zfs_xdvnodeops
;
341 struct vnodeops
*zfs_evnodeops
;
344 zfs_remove_op_tables()
350 (void) vfs_freevfsops_by_type(zfsfstype
);
357 vn_freevnodeops(zfs_dvnodeops
);
359 vn_freevnodeops(zfs_fvnodeops
);
361 vn_freevnodeops(zfs_symvnodeops
);
363 vn_freevnodeops(zfs_xdvnodeops
);
365 vn_freevnodeops(zfs_evnodeops
);
367 zfs_dvnodeops
= NULL
;
368 zfs_fvnodeops
= NULL
;
369 zfs_symvnodeops
= NULL
;
370 zfs_xdvnodeops
= NULL
;
371 zfs_evnodeops
= NULL
;
374 extern const fs_operation_def_t zfs_dvnodeops_template
[];
375 extern const fs_operation_def_t zfs_fvnodeops_template
[];
376 extern const fs_operation_def_t zfs_xdvnodeops_template
[];
377 extern const fs_operation_def_t zfs_symvnodeops_template
[];
378 extern const fs_operation_def_t zfs_evnodeops_template
[];
381 zfs_create_op_tables()
386 * zfs_dvnodeops can be set if mod_remove() calls mod_installfs()
387 * due to a failure to remove the the 2nd modlinkage (zfs_modldrv).
388 * In this case we just return as the ops vectors are already set up.
393 error
= vn_make_ops(MNTTYPE_ZFS
, zfs_dvnodeops_template
,
398 error
= vn_make_ops(MNTTYPE_ZFS
, zfs_fvnodeops_template
,
403 error
= vn_make_ops(MNTTYPE_ZFS
, zfs_symvnodeops_template
,
408 error
= vn_make_ops(MNTTYPE_ZFS
, zfs_xdvnodeops_template
,
413 error
= vn_make_ops(MNTTYPE_ZFS
, zfs_evnodeops_template
,
420 * zfs_init_fs - Initialize the zfsvfs struct and the file system
421 * incore "master" object. Verify version compatibility.
424 zfs_init_fs(zfsvfs_t
*zfsvfs
, znode_t
**zpp
)
426 extern int zfsfstype
;
428 objset_t
*os
= zfsvfs
->z_os
;
435 error
= zfs_get_zplprop(os
, ZFS_PROP_VERSION
, &zfsvfs
->z_version
);
438 } else if (zfsvfs
->z_version
> ZPL_VERSION
) {
439 (void) printf("Mismatched versions: File system "
440 "is version %llu on-disk format, which is "
441 "incompatible with this software version %lld!",
442 (u_longlong_t
)zfsvfs
->z_version
, ZPL_VERSION
);
446 if ((error
= zfs_get_zplprop(os
, ZFS_PROP_NORMALIZE
, &zval
)) != 0)
448 zfsvfs
->z_norm
= (int)zval
;
449 if ((error
= zfs_get_zplprop(os
, ZFS_PROP_UTF8ONLY
, &zval
)) != 0)
451 zfsvfs
->z_utf8
= (zval
!= 0);
452 if ((error
= zfs_get_zplprop(os
, ZFS_PROP_CASE
, &zval
)) != 0)
454 zfsvfs
->z_case
= (uint_t
)zval
;
456 * Fold case on file systems that are always or sometimes case
459 if (zfsvfs
->z_case
== ZFS_CASE_INSENSITIVE
||
460 zfsvfs
->z_case
== ZFS_CASE_MIXED
)
461 zfsvfs
->z_norm
|= U8_TEXTPREP_TOUPPER
;
464 * The fsid is 64 bits, composed of an 8-bit fs type, which
465 * separates our fsid from any other filesystem types, and a
466 * 56-bit objset unique ID. The objset unique ID is unique to
467 * all objsets open on this system, provided by unique_create().
468 * The 8-bit fs type must be put in the low bits of fsid[1]
469 * because that's where other Solaris filesystems put it.
471 fsid_guid
= dmu_objset_fsid_guid(os
);
472 ASSERT((fsid_guid
& ~((1ULL<<56)-1)) == 0);
473 zfsvfs
->z_vfs
->vfs_fsid
.val
[0] = fsid_guid
;
474 zfsvfs
->z_vfs
->vfs_fsid
.val
[1] = ((fsid_guid
>>32) << 8) |
477 error
= zap_lookup(os
, MASTER_NODE_OBJ
, ZFS_ROOT_OBJ
, 8, 1,
481 ASSERT(zfsvfs
->z_root
!= 0);
483 error
= zap_lookup(os
, MASTER_NODE_OBJ
, ZFS_UNLINKED_SET
, 8, 1,
484 &zfsvfs
->z_unlinkedobj
);
489 * Initialize zget mutex's
491 for (i
= 0; i
!= ZFS_OBJ_MTX_SZ
; i
++)
492 mutex_init(&zfsvfs
->z_hold_mtx
[i
], NULL
, MUTEX_DEFAULT
, NULL
);
494 error
= zfs_zget(zfsvfs
, zfsvfs
->z_root
, zpp
);
497 * On error, we destroy the mutexes here since it's not
498 * possible for the caller to determine if the mutexes were
499 * initialized properly.
501 for (i
= 0; i
!= ZFS_OBJ_MTX_SZ
; i
++)
502 mutex_destroy(&zfsvfs
->z_hold_mtx
[i
]);
505 ASSERT3U((*zpp
)->z_id
, ==, zfsvfs
->z_root
);
506 error
= zap_lookup(os
, MASTER_NODE_OBJ
, ZFS_FUID_TABLES
, 8, 1,
507 &zfsvfs
->z_fuid_obj
);
515 * define a couple of values we need available
516 * for both 64 and 32 bit environments.
519 #define NBITSMINOR64 32
522 #define MAXMAJ64 0xffffffffUL
525 #define MAXMIN64 0xffffffffUL
529 * Create special expldev for ZFS private use.
530 * Can't use standard expldev since it doesn't do
531 * what we want. The standard expldev() takes a
532 * dev32_t in LP64 and expands it to a long dev_t.
533 * We need an interface that takes a dev32_t in ILP32
534 * and expands it to a long dev_t.
537 zfs_expldev(dev_t dev
)
540 major_t major
= (major_t
)dev
>> NBITSMINOR32
& MAXMAJ32
;
541 return (((uint64_t)major
<< NBITSMINOR64
) |
542 ((minor_t
)dev
& MAXMIN32
));
549 * Special cmpldev for ZFS private use.
550 * Can't use standard cmpldev since it takes
551 * a long dev_t and compresses it to dev32_t in
552 * LP64. We need to do a compaction of a long dev_t
553 * to a dev32_t in ILP32.
556 zfs_cmpldev(uint64_t dev
)
559 minor_t minor
= (minor_t
)dev
& MAXMIN64
;
560 major_t major
= (major_t
)(dev
>> NBITSMINOR64
) & MAXMAJ64
;
562 if (major
> MAXMAJ32
|| minor
> MAXMIN32
)
565 return (((dev32_t
)major
<< NBITSMINOR32
) | minor
);
572 zfs_znode_dmu_init(zfsvfs_t
*zfsvfs
, znode_t
*zp
, dmu_buf_t
*db
)
576 ASSERT(!POINTER_IS_VALID(zp
->z_zfsvfs
) || (zfsvfs
== zp
->z_zfsvfs
));
577 ASSERT(MUTEX_HELD(ZFS_OBJ_MUTEX(zfsvfs
, zp
->z_id
)));
579 mutex_enter(&zp
->z_lock
);
581 ASSERT(zp
->z_dbuf
== NULL
);
583 nzp
= dmu_buf_set_user_ie(db
, zp
, &zp
->z_phys
, znode_evict_error
);
587 * concurrent zgets on this object.
590 panic("existing znode %p for dbuf %p", (void *)nzp
, (void *)db
);
593 * Slap on VROOT if we are the root znode
595 if (zp
->z_id
== zfsvfs
->z_root
)
596 ZTOV(zp
)->v_flag
|= VROOT
;
598 mutex_exit(&zp
->z_lock
);
603 zfs_znode_dmu_fini(znode_t
*zp
)
605 dmu_buf_t
*db
= zp
->z_dbuf
;
606 ASSERT(MUTEX_HELD(ZFS_OBJ_MUTEX(zp
->z_zfsvfs
, zp
->z_id
)) ||
608 RW_WRITE_HELD(&zp
->z_zfsvfs
->z_teardown_inactive_lock
));
609 ASSERT(zp
->z_dbuf
!= NULL
);
611 VERIFY(zp
== dmu_buf_update_user(db
, zp
, NULL
, NULL
, NULL
));
612 dmu_buf_rele(db
, NULL
);
616 * Construct a new znode/vnode and intialize.
618 * This does not do a call to dmu_set_user() that is
619 * up to the caller to do, in case you don't want to
623 zfs_znode_alloc(zfsvfs_t
*zfsvfs
, dmu_buf_t
*db
, int blksz
)
628 zp
= kmem_cache_alloc(znode_cache
, KM_SLEEP
);
630 ASSERT(zp
->z_dirlocks
== NULL
);
631 ASSERT(zp
->z_dbuf
== NULL
);
632 ASSERT(!POINTER_IS_VALID(zp
->z_zfsvfs
));
635 * Defer setting z_zfsvfs until the znode is ready to be a candidate for
636 * the zfs_znode_move() callback.
640 zp
->z_atime_dirty
= 0;
643 zp
->z_id
= db
->db_object
;
645 zp
->z_seq
= 0x7A4653;
651 zfs_znode_dmu_init(zfsvfs
, zp
, db
);
653 zp
->z_gen
= zp
->z_phys
->zp_gen
;
655 vp
->v_vfsp
= zfsvfs
->z_parent
->z_vfs
;
656 vp
->v_type
= IFTOVT((mode_t
)zp
->z_phys
->zp_mode
);
658 switch (vp
->v_type
) {
660 if (zp
->z_phys
->zp_flags
& ZFS_XATTR
) {
661 vn_setops(vp
, zfs_xdvnodeops
);
662 vp
->v_flag
|= V_XATTRDIR
;
664 vn_setops(vp
, zfs_dvnodeops
);
666 zp
->z_zn_prefetch
= B_TRUE
; /* z_prefetch default is enabled */
670 vp
->v_rdev
= zfs_cmpldev(zp
->z_phys
->zp_rdev
);
675 vn_setops(vp
, zfs_fvnodeops
);
678 vp
->v_flag
|= VMODSORT
;
679 vn_setops(vp
, zfs_fvnodeops
);
682 vn_setops(vp
, zfs_symvnodeops
);
685 vn_setops(vp
, zfs_evnodeops
);
689 mutex_enter(&zfsvfs
->z_znodes_lock
);
690 list_insert_tail(&zfsvfs
->z_all_znodes
, zp
);
693 * Everything else must be valid before assigning z_zfsvfs makes the
694 * znode eligible for zfs_znode_move().
696 zp
->z_zfsvfs
= zfsvfs
;
697 mutex_exit(&zfsvfs
->z_znodes_lock
);
699 VFS_HOLD(zfsvfs
->z_vfs
);
704 * Create a new DMU object to hold a zfs znode.
706 * IN: dzp - parent directory for new znode
707 * vap - file attributes for new znode
708 * tx - dmu transaction id for zap operations
709 * cr - credentials of caller
711 * IS_ROOT_NODE - new object will be root
712 * IS_XATTR - new object is an attribute
713 * IS_REPLAY - intent log replay
714 * bonuslen - length of bonus buffer
715 * setaclp - File/Dir initial ACL
716 * fuidp - Tracks fuid allocation.
718 * OUT: zpp - allocated znode
722 zfs_mknode(znode_t
*dzp
, vattr_t
*vap
, dmu_tx_t
*tx
, cred_t
*cr
,
723 uint_t flag
, znode_t
**zpp
, int bonuslen
, zfs_acl_t
*setaclp
,
724 zfs_fuid_info_t
**fuidp
)
728 zfsvfs_t
*zfsvfs
= dzp
->z_zfsvfs
;
733 ASSERT(vap
&& (vap
->va_mask
& (AT_TYPE
|AT_MODE
)) == (AT_TYPE
|AT_MODE
));
735 if (zfsvfs
->z_replay
) {
736 obj
= vap
->va_nodeid
;
738 now
= vap
->va_ctime
; /* see zfs_replay_create() */
739 gen
= vap
->va_nblocks
; /* ditto */
743 gen
= dmu_tx_get_txg(tx
);
747 * Create a new DMU object.
750 * There's currently no mechanism for pre-reading the blocks that will
751 * be to needed allocate a new object, so we accept the small chance
752 * that there will be an i/o error and we will fail one of the
755 if (vap
->va_type
== VDIR
) {
756 if (flag
& IS_REPLAY
) {
757 err
= zap_create_claim_norm(zfsvfs
->z_os
, obj
,
758 zfsvfs
->z_norm
, DMU_OT_DIRECTORY_CONTENTS
,
759 DMU_OT_ZNODE
, sizeof (znode_phys_t
) + bonuslen
, tx
);
760 ASSERT3U(err
, ==, 0);
762 obj
= zap_create_norm(zfsvfs
->z_os
,
763 zfsvfs
->z_norm
, DMU_OT_DIRECTORY_CONTENTS
,
764 DMU_OT_ZNODE
, sizeof (znode_phys_t
) + bonuslen
, tx
);
767 if (flag
& IS_REPLAY
) {
768 err
= dmu_object_claim(zfsvfs
->z_os
, obj
,
769 DMU_OT_PLAIN_FILE_CONTENTS
, 0,
770 DMU_OT_ZNODE
, sizeof (znode_phys_t
) + bonuslen
, tx
);
771 ASSERT3U(err
, ==, 0);
773 obj
= dmu_object_alloc(zfsvfs
->z_os
,
774 DMU_OT_PLAIN_FILE_CONTENTS
, 0,
775 DMU_OT_ZNODE
, sizeof (znode_phys_t
) + bonuslen
, tx
);
778 VERIFY(0 == dmu_bonus_hold(zfsvfs
->z_os
, obj
, NULL
, &db
));
779 dmu_buf_will_dirty(db
, tx
);
782 * Initialize the znode physical data to zero.
784 ASSERT(db
->db_size
>= sizeof (znode_phys_t
));
785 bzero(db
->db_data
, db
->db_size
);
789 * If this is the root, fix up the half-initialized parent pointer
790 * to reference the just-allocated physical data area.
792 if (flag
& IS_ROOT_NODE
) {
799 * If parent is an xattr, so am I.
801 if (dzp
->z_phys
->zp_flags
& ZFS_XATTR
)
804 if (vap
->va_type
== VBLK
|| vap
->va_type
== VCHR
) {
805 pzp
->zp_rdev
= zfs_expldev(vap
->va_rdev
);
808 if (zfsvfs
->z_use_fuids
)
809 pzp
->zp_flags
= ZFS_ARCHIVE
| ZFS_AV_MODIFIED
;
811 if (vap
->va_type
== VDIR
) {
812 pzp
->zp_size
= 2; /* contents ("." and "..") */
813 pzp
->zp_links
= (flag
& (IS_ROOT_NODE
| IS_XATTR
)) ? 2 : 1;
816 pzp
->zp_parent
= dzp
->z_id
;
818 pzp
->zp_flags
|= ZFS_XATTR
;
822 ZFS_TIME_ENCODE(&now
, pzp
->zp_crtime
);
823 ZFS_TIME_ENCODE(&now
, pzp
->zp_ctime
);
825 if (vap
->va_mask
& AT_ATIME
) {
826 ZFS_TIME_ENCODE(&vap
->va_atime
, pzp
->zp_atime
);
828 ZFS_TIME_ENCODE(&now
, pzp
->zp_atime
);
831 if (vap
->va_mask
& AT_MTIME
) {
832 ZFS_TIME_ENCODE(&vap
->va_mtime
, pzp
->zp_mtime
);
834 ZFS_TIME_ENCODE(&now
, pzp
->zp_mtime
);
837 pzp
->zp_mode
= MAKEIMODE(vap
->va_type
, vap
->va_mode
);
838 if (!(flag
& IS_ROOT_NODE
)) {
839 ZFS_OBJ_HOLD_ENTER(zfsvfs
, obj
);
840 *zpp
= zfs_znode_alloc(zfsvfs
, db
, 0);
841 ZFS_OBJ_HOLD_EXIT(zfsvfs
, obj
);
844 * If we are creating the root node, the "parent" we
845 * passed in is the znode for the root.
849 zfs_perm_init(*zpp
, dzp
, flag
, vap
, tx
, cr
, setaclp
, fuidp
);
853 zfs_xvattr_set(znode_t
*zp
, xvattr_t
*xvap
)
857 xoap
= xva_getxoptattr(xvap
);
860 if (XVA_ISSET_REQ(xvap
, XAT_CREATETIME
)) {
861 ZFS_TIME_ENCODE(&xoap
->xoa_createtime
, zp
->z_phys
->zp_crtime
);
862 XVA_SET_RTN(xvap
, XAT_CREATETIME
);
864 if (XVA_ISSET_REQ(xvap
, XAT_READONLY
)) {
865 ZFS_ATTR_SET(zp
, ZFS_READONLY
, xoap
->xoa_readonly
);
866 XVA_SET_RTN(xvap
, XAT_READONLY
);
868 if (XVA_ISSET_REQ(xvap
, XAT_HIDDEN
)) {
869 ZFS_ATTR_SET(zp
, ZFS_HIDDEN
, xoap
->xoa_hidden
);
870 XVA_SET_RTN(xvap
, XAT_HIDDEN
);
872 if (XVA_ISSET_REQ(xvap
, XAT_SYSTEM
)) {
873 ZFS_ATTR_SET(zp
, ZFS_SYSTEM
, xoap
->xoa_system
);
874 XVA_SET_RTN(xvap
, XAT_SYSTEM
);
876 if (XVA_ISSET_REQ(xvap
, XAT_ARCHIVE
)) {
877 ZFS_ATTR_SET(zp
, ZFS_ARCHIVE
, xoap
->xoa_archive
);
878 XVA_SET_RTN(xvap
, XAT_ARCHIVE
);
880 if (XVA_ISSET_REQ(xvap
, XAT_IMMUTABLE
)) {
881 ZFS_ATTR_SET(zp
, ZFS_IMMUTABLE
, xoap
->xoa_immutable
);
882 XVA_SET_RTN(xvap
, XAT_IMMUTABLE
);
884 if (XVA_ISSET_REQ(xvap
, XAT_NOUNLINK
)) {
885 ZFS_ATTR_SET(zp
, ZFS_NOUNLINK
, xoap
->xoa_nounlink
);
886 XVA_SET_RTN(xvap
, XAT_NOUNLINK
);
888 if (XVA_ISSET_REQ(xvap
, XAT_APPENDONLY
)) {
889 ZFS_ATTR_SET(zp
, ZFS_APPENDONLY
, xoap
->xoa_appendonly
);
890 XVA_SET_RTN(xvap
, XAT_APPENDONLY
);
892 if (XVA_ISSET_REQ(xvap
, XAT_NODUMP
)) {
893 ZFS_ATTR_SET(zp
, ZFS_NODUMP
, xoap
->xoa_nodump
);
894 XVA_SET_RTN(xvap
, XAT_NODUMP
);
896 if (XVA_ISSET_REQ(xvap
, XAT_OPAQUE
)) {
897 ZFS_ATTR_SET(zp
, ZFS_OPAQUE
, xoap
->xoa_opaque
);
898 XVA_SET_RTN(xvap
, XAT_OPAQUE
);
900 if (XVA_ISSET_REQ(xvap
, XAT_AV_QUARANTINED
)) {
901 ZFS_ATTR_SET(zp
, ZFS_AV_QUARANTINED
,
902 xoap
->xoa_av_quarantined
);
903 XVA_SET_RTN(xvap
, XAT_AV_QUARANTINED
);
905 if (XVA_ISSET_REQ(xvap
, XAT_AV_MODIFIED
)) {
906 ZFS_ATTR_SET(zp
, ZFS_AV_MODIFIED
, xoap
->xoa_av_modified
);
907 XVA_SET_RTN(xvap
, XAT_AV_MODIFIED
);
909 if (XVA_ISSET_REQ(xvap
, XAT_AV_SCANSTAMP
)) {
910 (void) memcpy(zp
->z_phys
+ 1, xoap
->xoa_av_scanstamp
,
911 sizeof (xoap
->xoa_av_scanstamp
));
912 zp
->z_phys
->zp_flags
|= ZFS_BONUS_SCANSTAMP
;
913 XVA_SET_RTN(xvap
, XAT_AV_SCANSTAMP
);
918 zfs_zget(zfsvfs_t
*zfsvfs
, uint64_t obj_num
, znode_t
**zpp
)
920 dmu_object_info_t doi
;
927 ZFS_OBJ_HOLD_ENTER(zfsvfs
, obj_num
);
929 err
= dmu_bonus_hold(zfsvfs
->z_os
, obj_num
, NULL
, &db
);
931 ZFS_OBJ_HOLD_EXIT(zfsvfs
, obj_num
);
935 dmu_object_info_from_db(db
, &doi
);
936 if (doi
.doi_bonus_type
!= DMU_OT_ZNODE
||
937 doi
.doi_bonus_size
< sizeof (znode_phys_t
)) {
938 dmu_buf_rele(db
, NULL
);
939 ZFS_OBJ_HOLD_EXIT(zfsvfs
, obj_num
);
943 zp
= dmu_buf_get_user(db
);
945 mutex_enter(&zp
->z_lock
);
948 * Since we do immediate eviction of the z_dbuf, we
949 * should never find a dbuf with a znode that doesn't
950 * know about the dbuf.
952 ASSERT3P(zp
->z_dbuf
, ==, db
);
953 ASSERT3U(zp
->z_id
, ==, obj_num
);
954 if (zp
->z_unlinked
) {
961 dmu_buf_rele(db
, NULL
);
962 mutex_exit(&zp
->z_lock
);
963 ZFS_OBJ_HOLD_EXIT(zfsvfs
, obj_num
);
968 * Not found create new znode/vnode
970 zp
= zfs_znode_alloc(zfsvfs
, db
, doi
.doi_data_block_size
);
971 ZFS_OBJ_HOLD_EXIT(zfsvfs
, obj_num
);
977 zfs_rezget(znode_t
*zp
)
979 zfsvfs_t
*zfsvfs
= zp
->z_zfsvfs
;
980 dmu_object_info_t doi
;
982 uint64_t obj_num
= zp
->z_id
;
985 ZFS_OBJ_HOLD_ENTER(zfsvfs
, obj_num
);
987 err
= dmu_bonus_hold(zfsvfs
->z_os
, obj_num
, NULL
, &db
);
989 ZFS_OBJ_HOLD_EXIT(zfsvfs
, obj_num
);
993 dmu_object_info_from_db(db
, &doi
);
994 if (doi
.doi_bonus_type
!= DMU_OT_ZNODE
||
995 doi
.doi_bonus_size
< sizeof (znode_phys_t
)) {
996 dmu_buf_rele(db
, NULL
);
997 ZFS_OBJ_HOLD_EXIT(zfsvfs
, obj_num
);
1001 if (((znode_phys_t
*)db
->db_data
)->zp_gen
!= zp
->z_gen
) {
1002 dmu_buf_rele(db
, NULL
);
1003 ZFS_OBJ_HOLD_EXIT(zfsvfs
, obj_num
);
1007 zfs_znode_dmu_init(zfsvfs
, zp
, db
);
1008 zp
->z_unlinked
= (zp
->z_phys
->zp_links
== 0);
1009 zp
->z_blksz
= doi
.doi_data_block_size
;
1011 ZFS_OBJ_HOLD_EXIT(zfsvfs
, obj_num
);
1017 zfs_znode_delete(znode_t
*zp
, dmu_tx_t
*tx
)
1019 zfsvfs_t
*zfsvfs
= zp
->z_zfsvfs
;
1020 objset_t
*os
= zfsvfs
->z_os
;
1021 uint64_t obj
= zp
->z_id
;
1022 uint64_t acl_obj
= zp
->z_phys
->zp_acl
.z_acl_extern_obj
;
1024 ZFS_OBJ_HOLD_ENTER(zfsvfs
, obj
);
1026 VERIFY(0 == dmu_object_free(os
, acl_obj
, tx
));
1027 VERIFY(0 == dmu_object_free(os
, obj
, tx
));
1028 zfs_znode_dmu_fini(zp
);
1029 ZFS_OBJ_HOLD_EXIT(zfsvfs
, obj
);
1034 zfs_zinactive(znode_t
*zp
)
1036 vnode_t
*vp
= ZTOV(zp
);
1037 zfsvfs_t
*zfsvfs
= zp
->z_zfsvfs
;
1038 uint64_t z_id
= zp
->z_id
;
1040 ASSERT(zp
->z_dbuf
&& zp
->z_phys
);
1043 * Don't allow a zfs_zget() while were trying to release this znode
1045 ZFS_OBJ_HOLD_ENTER(zfsvfs
, z_id
);
1047 mutex_enter(&zp
->z_lock
);
1048 mutex_enter(&vp
->v_lock
);
1050 if (vp
->v_count
> 0 || vn_has_cached_data(vp
)) {
1052 * If the hold count is greater than zero, somebody has
1053 * obtained a new reference on this znode while we were
1054 * processing it here, so we are done. If we still have
1055 * mapped pages then we are also done, since we don't
1056 * want to inactivate the znode until the pages get pushed.
1058 * XXX - if vn_has_cached_data(vp) is true, but count == 0,
1059 * this seems like it would leave the znode hanging with
1060 * no chance to go inactive...
1062 mutex_exit(&vp
->v_lock
);
1063 mutex_exit(&zp
->z_lock
);
1064 ZFS_OBJ_HOLD_EXIT(zfsvfs
, z_id
);
1067 mutex_exit(&vp
->v_lock
);
1070 * If this was the last reference to a file with no links,
1071 * remove the file from the file system.
1073 if (zp
->z_unlinked
) {
1074 mutex_exit(&zp
->z_lock
);
1075 ZFS_OBJ_HOLD_EXIT(zfsvfs
, z_id
);
1079 mutex_exit(&zp
->z_lock
);
1080 zfs_znode_dmu_fini(zp
);
1081 ZFS_OBJ_HOLD_EXIT(zfsvfs
, z_id
);
1086 zfs_znode_free(znode_t
*zp
)
1088 zfsvfs_t
*zfsvfs
= zp
->z_zfsvfs
;
1090 vn_invalid(ZTOV(zp
));
1092 ASSERT(ZTOV(zp
)->v_count
== 0);
1094 mutex_enter(&zfsvfs
->z_znodes_lock
);
1095 POINTER_INVALIDATE(&zp
->z_zfsvfs
);
1096 list_remove(&zfsvfs
->z_all_znodes
, zp
);
1097 mutex_exit(&zfsvfs
->z_znodes_lock
);
1099 kmem_cache_free(znode_cache
, zp
);
1101 VFS_RELE(zfsvfs
->z_vfs
);
1105 zfs_time_stamper_locked(znode_t
*zp
, uint_t flag
, dmu_tx_t
*tx
)
1109 ASSERT(MUTEX_HELD(&zp
->z_lock
));
1114 dmu_buf_will_dirty(zp
->z_dbuf
, tx
);
1115 zp
->z_atime_dirty
= 0;
1118 zp
->z_atime_dirty
= 1;
1121 if (flag
& AT_ATIME
)
1122 ZFS_TIME_ENCODE(&now
, zp
->z_phys
->zp_atime
);
1124 if (flag
& AT_MTIME
) {
1125 ZFS_TIME_ENCODE(&now
, zp
->z_phys
->zp_mtime
);
1126 if (zp
->z_zfsvfs
->z_use_fuids
)
1127 zp
->z_phys
->zp_flags
|= (ZFS_ARCHIVE
| ZFS_AV_MODIFIED
);
1130 if (flag
& AT_CTIME
) {
1131 ZFS_TIME_ENCODE(&now
, zp
->z_phys
->zp_ctime
);
1132 if (zp
->z_zfsvfs
->z_use_fuids
)
1133 zp
->z_phys
->zp_flags
|= ZFS_ARCHIVE
;
1138 * Update the requested znode timestamps with the current time.
1139 * If we are in a transaction, then go ahead and mark the znode
1140 * dirty in the transaction so the timestamps will go to disk.
1141 * Otherwise, we will get pushed next time the znode is updated
1142 * in a transaction, or when this znode eventually goes inactive.
1145 * 1 - Only the ACCESS time is ever updated outside of a transaction.
1146 * 2 - Multiple consecutive updates will be collapsed into a single
1147 * znode update by the transaction grouping semantics of the DMU.
1150 zfs_time_stamper(znode_t
*zp
, uint_t flag
, dmu_tx_t
*tx
)
1152 mutex_enter(&zp
->z_lock
);
1153 zfs_time_stamper_locked(zp
, flag
, tx
);
1154 mutex_exit(&zp
->z_lock
);
1158 * Grow the block size for a file.
1160 * IN: zp - znode of file to free data in.
1161 * size - requested block size
1162 * tx - open transaction.
1164 * NOTE: this function assumes that the znode is write locked.
1167 zfs_grow_blocksize(znode_t
*zp
, uint64_t size
, dmu_tx_t
*tx
)
1172 if (size
<= zp
->z_blksz
)
1175 * If the file size is already greater than the current blocksize,
1176 * we will not grow. If there is more than one block in a file,
1177 * the blocksize cannot change.
1179 if (zp
->z_blksz
&& zp
->z_phys
->zp_size
> zp
->z_blksz
)
1182 error
= dmu_object_set_blocksize(zp
->z_zfsvfs
->z_os
, zp
->z_id
,
1184 if (error
== ENOTSUP
)
1186 ASSERT3U(error
, ==, 0);
1188 /* What blocksize did we actually get? */
1189 dmu_object_size_from_db(zp
->z_dbuf
, &zp
->z_blksz
, &dummy
);
1193 * This is a dummy interface used when pvn_vplist_dirty() should *not*
1194 * be calling back into the fs for a putpage(). E.g.: when truncating
1195 * a file, the pages being "thrown away* don't need to be written out.
1199 zfs_no_putpage(vnode_t
*vp
, page_t
*pp
, u_offset_t
*offp
, size_t *lenp
,
1200 int flags
, cred_t
*cr
)
1207 * Increase the file length
1209 * IN: zp - znode of file to free data in.
1210 * end - new end-of-file
1212 * RETURN: 0 if success
1213 * error code if failure
1216 zfs_extend(znode_t
*zp
, uint64_t end
)
1218 zfsvfs_t
*zfsvfs
= zp
->z_zfsvfs
;
1225 * We will change zp_size, lock the whole file.
1227 rl
= zfs_range_lock(zp
, 0, UINT64_MAX
, RL_WRITER
);
1230 * Nothing to do if file already at desired length.
1232 if (end
<= zp
->z_phys
->zp_size
) {
1233 zfs_range_unlock(rl
);
1237 tx
= dmu_tx_create(zfsvfs
->z_os
);
1238 dmu_tx_hold_bonus(tx
, zp
->z_id
);
1239 if (end
> zp
->z_blksz
&&
1240 (!ISP2(zp
->z_blksz
) || zp
->z_blksz
< zfsvfs
->z_max_blksz
)) {
1242 * We are growing the file past the current block size.
1244 if (zp
->z_blksz
> zp
->z_zfsvfs
->z_max_blksz
) {
1245 ASSERT(!ISP2(zp
->z_blksz
));
1246 newblksz
= MIN(end
, SPA_MAXBLOCKSIZE
);
1248 newblksz
= MIN(end
, zp
->z_zfsvfs
->z_max_blksz
);
1250 dmu_tx_hold_write(tx
, zp
->z_id
, 0, newblksz
);
1255 error
= dmu_tx_assign(tx
, TXG_NOWAIT
);
1257 if (error
== ERESTART
) {
1263 zfs_range_unlock(rl
);
1266 dmu_buf_will_dirty(zp
->z_dbuf
, tx
);
1269 zfs_grow_blocksize(zp
, newblksz
, tx
);
1271 zp
->z_phys
->zp_size
= end
;
1273 zfs_range_unlock(rl
);
1281 * Free space in a file.
1283 * IN: zp - znode of file to free data in.
1284 * off - start of section to free.
1285 * len - length of section to free.
1287 * RETURN: 0 if success
1288 * error code if failure
1291 zfs_free_range(znode_t
*zp
, uint64_t off
, uint64_t len
)
1293 zfsvfs_t
*zfsvfs
= zp
->z_zfsvfs
;
1298 * Lock the range being freed.
1300 rl
= zfs_range_lock(zp
, off
, len
, RL_WRITER
);
1303 * Nothing to do if file already at desired length.
1305 if (off
>= zp
->z_phys
->zp_size
) {
1306 zfs_range_unlock(rl
);
1310 if (off
+ len
> zp
->z_phys
->zp_size
)
1311 len
= zp
->z_phys
->zp_size
- off
;
1313 error
= dmu_free_long_range(zfsvfs
->z_os
, zp
->z_id
, off
, len
);
1315 zfs_range_unlock(rl
);
1323 * IN: zp - znode of file to free data in.
1324 * end - new end-of-file.
1326 * RETURN: 0 if success
1327 * error code if failure
1330 zfs_trunc(znode_t
*zp
, uint64_t end
)
1332 zfsvfs_t
*zfsvfs
= zp
->z_zfsvfs
;
1333 vnode_t
*vp
= ZTOV(zp
);
1339 * We will change zp_size, lock the whole file.
1341 rl
= zfs_range_lock(zp
, 0, UINT64_MAX
, RL_WRITER
);
1344 * Nothing to do if file already at desired length.
1346 if (end
>= zp
->z_phys
->zp_size
) {
1347 zfs_range_unlock(rl
);
1351 error
= dmu_free_long_range(zfsvfs
->z_os
, zp
->z_id
, end
, -1);
1353 zfs_range_unlock(rl
);
1357 tx
= dmu_tx_create(zfsvfs
->z_os
);
1358 dmu_tx_hold_bonus(tx
, zp
->z_id
);
1359 error
= dmu_tx_assign(tx
, TXG_NOWAIT
);
1361 if (error
== ERESTART
) {
1367 zfs_range_unlock(rl
);
1370 dmu_buf_will_dirty(zp
->z_dbuf
, tx
);
1372 zp
->z_phys
->zp_size
= end
;
1377 * Clear any mapped pages in the truncated region. This has to
1378 * happen outside of the transaction to avoid the possibility of
1379 * a deadlock with someone trying to push a page that we are
1380 * about to invalidate.
1382 if (vn_has_cached_data(vp
)) {
1384 uint64_t start
= end
& PAGEMASK
;
1385 int poff
= end
& PAGEOFFSET
;
1387 if (poff
!= 0 && (pp
= page_lookup(vp
, start
, SE_SHARED
))) {
1389 * We need to zero a partial page.
1391 pagezero(pp
, poff
, PAGESIZE
- poff
);
1395 error
= pvn_vplist_dirty(vp
, start
, zfs_no_putpage
,
1396 B_INVAL
| B_TRUNC
, NULL
);
1400 zfs_range_unlock(rl
);
1406 * Free space in a file
1408 * IN: zp - znode of file to free data in.
1409 * off - start of range
1410 * len - end of range (0 => EOF)
1411 * flag - current file open mode flags.
1412 * log - TRUE if this action should be logged
1414 * RETURN: 0 if success
1415 * error code if failure
1418 zfs_freesp(znode_t
*zp
, uint64_t off
, uint64_t len
, int flag
, boolean_t log
)
1420 vnode_t
*vp
= ZTOV(zp
);
1422 zfsvfs_t
*zfsvfs
= zp
->z_zfsvfs
;
1423 zilog_t
*zilog
= zfsvfs
->z_log
;
1426 if (off
> zp
->z_phys
->zp_size
) {
1427 error
= zfs_extend(zp
, off
+len
);
1428 if (error
== 0 && log
)
1435 * Check for any locks in the region to be freed.
1437 if (MANDLOCK(vp
, (mode_t
)zp
->z_phys
->zp_mode
)) {
1438 uint64_t length
= (len
? len
: zp
->z_phys
->zp_size
- off
);
1439 if (error
= chklock(vp
, FWRITE
, off
, length
, flag
, NULL
))
1444 error
= zfs_trunc(zp
, off
);
1446 if ((error
= zfs_free_range(zp
, off
, len
)) == 0 &&
1447 off
+ len
> zp
->z_phys
->zp_size
)
1448 error
= zfs_extend(zp
, off
+len
);
1453 tx
= dmu_tx_create(zfsvfs
->z_os
);
1454 dmu_tx_hold_bonus(tx
, zp
->z_id
);
1455 error
= dmu_tx_assign(tx
, TXG_NOWAIT
);
1457 if (error
== ERESTART
) {
1466 zfs_time_stamper(zp
, CONTENT_MODIFIED
, tx
);
1467 zfs_log_truncate(zilog
, tx
, TX_TRUNCATE
, zp
, off
, len
);
1474 zfs_create_fs(objset_t
*os
, cred_t
*cr
, nvlist_t
*zplprops
, dmu_tx_t
*tx
)
1477 uint64_t moid
, doid
, version
;
1478 uint64_t sense
= ZFS_CASE_SENSITIVE
;
1482 znode_t
*rootzp
= NULL
;
1488 * First attempt to create master node.
1491 * In an empty objset, there are no blocks to read and thus
1492 * there can be no i/o errors (which we assert below).
1494 moid
= MASTER_NODE_OBJ
;
1495 error
= zap_create_claim(os
, moid
, DMU_OT_MASTER_NODE
,
1496 DMU_OT_NONE
, 0, tx
);
1500 * Set starting attributes.
1502 if (spa_version(dmu_objset_spa(os
)) >= SPA_VERSION_FUID
)
1503 version
= ZPL_VERSION
;
1505 version
= ZPL_VERSION_FUID
- 1;
1506 error
= zap_update(os
, moid
, ZPL_VERSION_STR
,
1507 8, 1, &version
, tx
);
1509 while ((elem
= nvlist_next_nvpair(zplprops
, elem
)) != NULL
) {
1510 /* For the moment we expect all zpl props to be uint64_ts */
1514 ASSERT(nvpair_type(elem
) == DATA_TYPE_UINT64
);
1515 VERIFY(nvpair_value_uint64(elem
, &val
) == 0);
1516 name
= nvpair_name(elem
);
1517 if (strcmp(name
, zfs_prop_to_name(ZFS_PROP_VERSION
)) == 0) {
1519 error
= zap_update(os
, moid
, ZPL_VERSION_STR
,
1520 8, 1, &version
, tx
);
1522 error
= zap_update(os
, moid
, name
, 8, 1, &val
, tx
);
1525 if (strcmp(name
, zfs_prop_to_name(ZFS_PROP_NORMALIZE
)) == 0)
1527 else if (strcmp(name
, zfs_prop_to_name(ZFS_PROP_CASE
)) == 0)
1530 ASSERT(version
!= 0);
1533 * Create a delete queue.
1535 doid
= zap_create(os
, DMU_OT_UNLINKED_SET
, DMU_OT_NONE
, 0, tx
);
1537 error
= zap_add(os
, moid
, ZFS_UNLINKED_SET
, 8, 1, &doid
, tx
);
1541 * Create root znode. Create minimal znode/vnode/zfsvfs
1542 * to allow zfs_mknode to work.
1544 vattr
.va_mask
= AT_MODE
|AT_UID
|AT_GID
|AT_TYPE
;
1545 vattr
.va_type
= VDIR
;
1546 vattr
.va_mode
= S_IFDIR
|0755;
1547 vattr
.va_uid
= crgetuid(cr
);
1548 vattr
.va_gid
= crgetgid(cr
);
1550 rootzp
= kmem_cache_alloc(znode_cache
, KM_SLEEP
);
1551 rootzp
->z_unlinked
= 0;
1552 rootzp
->z_atime_dirty
= 0;
1558 bzero(&zfsvfs
, sizeof (zfsvfs_t
));
1561 zfsvfs
.z_parent
= &zfsvfs
;
1562 zfsvfs
.z_version
= version
;
1563 zfsvfs
.z_use_fuids
= USE_FUIDS(version
, os
);
1564 zfsvfs
.z_norm
= norm
;
1566 * Fold case on file systems that are always or sometimes case
1569 if (sense
== ZFS_CASE_INSENSITIVE
|| sense
== ZFS_CASE_MIXED
)
1570 zfsvfs
.z_norm
|= U8_TEXTPREP_TOUPPER
;
1572 mutex_init(&zfsvfs
.z_znodes_lock
, NULL
, MUTEX_DEFAULT
, NULL
);
1573 list_create(&zfsvfs
.z_all_znodes
, sizeof (znode_t
),
1574 offsetof(znode_t
, z_link_node
));
1576 ASSERT(!POINTER_IS_VALID(rootzp
->z_zfsvfs
));
1577 rootzp
->z_zfsvfs
= &zfsvfs
;
1578 zfs_mknode(rootzp
, &vattr
, tx
, cr
, IS_ROOT_NODE
, &zp
, 0, NULL
, NULL
);
1579 ASSERT3P(zp
, ==, rootzp
);
1580 ASSERT(!vn_in_dnlc(ZTOV(rootzp
))); /* not valid to move */
1581 error
= zap_add(os
, moid
, ZFS_ROOT_OBJ
, 8, 1, &rootzp
->z_id
, tx
);
1583 POINTER_INVALIDATE(&rootzp
->z_zfsvfs
);
1585 ZTOV(rootzp
)->v_count
= 0;
1586 dmu_buf_rele(rootzp
->z_dbuf
, NULL
);
1587 rootzp
->z_dbuf
= NULL
;
1588 kmem_cache_free(znode_cache
, rootzp
);
1591 #endif /* _KERNEL */
1593 * Given an object number, return its parent object number and whether
1594 * or not the object is an extended attribute directory.
1597 zfs_obj_to_pobj(objset_t
*osp
, uint64_t obj
, uint64_t *pobjp
, int *is_xattrdir
)
1600 dmu_object_info_t doi
;
1604 if ((error
= dmu_bonus_hold(osp
, obj
, FTAG
, &db
)) != 0)
1607 dmu_object_info_from_db(db
, &doi
);
1608 if (doi
.doi_bonus_type
!= DMU_OT_ZNODE
||
1609 doi
.doi_bonus_size
< sizeof (znode_phys_t
)) {
1610 dmu_buf_rele(db
, FTAG
);
1615 *pobjp
= zp
->zp_parent
;
1616 *is_xattrdir
= ((zp
->zp_flags
& ZFS_XATTR
) != 0) &&
1617 S_ISDIR(zp
->zp_mode
);
1618 dmu_buf_rele(db
, FTAG
);
1624 zfs_obj_to_path(objset_t
*osp
, uint64_t obj
, char *buf
, int len
)
1626 char *path
= buf
+ len
- 1;
1633 char component
[MAXNAMELEN
+ 2];
1637 if ((error
= zfs_obj_to_pobj(osp
, obj
, &pobj
,
1638 &is_xattrdir
)) != 0)
1649 (void) sprintf(component
+ 1, "<xattrdir>");
1651 error
= zap_value_search(osp
, pobj
, obj
,
1652 ZFS_DIRENT_OBJ(-1ULL), component
+ 1);
1657 complen
= strlen(component
);
1659 ASSERT(path
>= buf
);
1660 bcopy(component
, path
, complen
);
1665 (void) memmove(buf
, path
, buf
+ len
- path
);