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 2007 Jeremy Teo */
28 #include <sys/types.h>
29 #include <sys/param.h>
31 #include <sys/systm.h>
32 #include <sys/sysmacros.h>
33 #include <sys/resource.h>
34 #include <sys/mntent.h>
35 #include <sys/mkdev.h>
36 #include <sys/u8_textprep.h>
37 #include <sys/dsl_dataset.h>
39 #include <sys/vfs_opreg.h>
40 #include <sys/vnode.h>
43 #include <sys/errno.h>
44 #include <sys/unistd.h>
46 #include <sys/atomic.h>
48 #include "fs/fs_subr.h"
49 #include <sys/zfs_dir.h>
50 #include <sys/zfs_acl.h>
51 #include <sys/zfs_ioctl.h>
52 #include <sys/zfs_rlock.h>
53 #include <sys/zfs_fuid.h>
54 #include <sys/dnode.h>
55 #include <sys/fs/zfs.h>
56 #include <sys/kidmap.h>
60 #include <sys/refcount.h>
63 #include <sys/zfs_znode.h>
65 #include <sys/zfs_sa.h>
66 #include <sys/zfs_stat.h>
69 #include "zfs_comutil.h"
72 * Define ZNODE_STATS to turn on statistic gathering. By default, it is only
73 * turned on when DEBUG is also defined.
80 #define ZNODE_STAT_ADD(stat) ((stat)++)
82 #define ZNODE_STAT_ADD(stat) /* nothing */
83 #endif /* ZNODE_STATS */
86 * Functions needed for userland (ie: libzpool) are not put under
87 * #ifdef_KERNEL; the rest of the functions have dependencies
88 * (such as VFS logic) that will not compile easily in userland.
92 * Needed to close a small window in zfs_znode_move() that allows the zfsvfs to
93 * be freed before it can be safely accessed.
95 krwlock_t zfsvfs_lock
;
97 static kmem_cache_t
*znode_cache
= NULL
;
101 znode_evict_error(dmu_buf_t
*dbuf
, void *user_ptr
)
104 * We should never drop all dbuf refs without first clearing
105 * the eviction callback.
107 panic("evicting znode %p\n", user_ptr
);
112 zfs_znode_cache_constructor(void *buf
, void *arg
, int kmflags
)
116 ASSERT(!POINTER_IS_VALID(zp
->z_zfsvfs
));
118 zp
->z_vnode
= vn_alloc(kmflags
);
119 if (zp
->z_vnode
== NULL
) {
122 ZTOV(zp
)->v_data
= zp
;
124 list_link_init(&zp
->z_link_node
);
126 mutex_init(&zp
->z_lock
, NULL
, MUTEX_DEFAULT
, NULL
);
127 rw_init(&zp
->z_parent_lock
, NULL
, RW_DEFAULT
, NULL
);
128 rw_init(&zp
->z_name_lock
, NULL
, RW_DEFAULT
, NULL
);
129 mutex_init(&zp
->z_acl_lock
, NULL
, MUTEX_DEFAULT
, NULL
);
131 mutex_init(&zp
->z_range_lock
, NULL
, MUTEX_DEFAULT
, NULL
);
132 avl_create(&zp
->z_range_avl
, zfs_range_compare
,
133 sizeof (rl_t
), offsetof(rl_t
, r_node
));
135 zp
->z_dirlocks
= NULL
;
136 zp
->z_acl_cached
= NULL
;
143 zfs_znode_cache_destructor(void *buf
, void *arg
)
147 ASSERT(!POINTER_IS_VALID(zp
->z_zfsvfs
));
148 ASSERT(ZTOV(zp
)->v_data
== zp
);
150 ASSERT(!list_link_active(&zp
->z_link_node
));
151 mutex_destroy(&zp
->z_lock
);
152 rw_destroy(&zp
->z_parent_lock
);
153 rw_destroy(&zp
->z_name_lock
);
154 mutex_destroy(&zp
->z_acl_lock
);
155 avl_destroy(&zp
->z_range_avl
);
156 mutex_destroy(&zp
->z_range_lock
);
158 ASSERT(zp
->z_dirlocks
== NULL
);
159 ASSERT(zp
->z_acl_cached
== NULL
);
164 uint64_t zms_zfsvfs_invalid
;
165 uint64_t zms_zfsvfs_recheck1
;
166 uint64_t zms_zfsvfs_unmounted
;
167 uint64_t zms_zfsvfs_recheck2
;
168 uint64_t zms_obj_held
;
169 uint64_t zms_vnode_locked
;
170 uint64_t zms_not_only_dnlc
;
172 #endif /* ZNODE_STATS */
175 zfs_znode_move_impl(znode_t
*ozp
, znode_t
*nzp
)
180 nzp
->z_zfsvfs
= ozp
->z_zfsvfs
;
184 nzp
->z_vnode
= ozp
->z_vnode
;
185 ozp
->z_vnode
= vp
; /* let destructor free the overwritten vnode */
186 ZTOV(ozp
)->v_data
= ozp
;
187 ZTOV(nzp
)->v_data
= nzp
;
189 nzp
->z_id
= ozp
->z_id
;
190 ASSERT(ozp
->z_dirlocks
== NULL
); /* znode not in use */
191 ASSERT(avl_numnodes(&ozp
->z_range_avl
) == 0);
192 nzp
->z_unlinked
= ozp
->z_unlinked
;
193 nzp
->z_atime_dirty
= ozp
->z_atime_dirty
;
194 nzp
->z_zn_prefetch
= ozp
->z_zn_prefetch
;
195 nzp
->z_blksz
= ozp
->z_blksz
;
196 nzp
->z_seq
= ozp
->z_seq
;
197 nzp
->z_mapcnt
= ozp
->z_mapcnt
;
198 nzp
->z_gen
= ozp
->z_gen
;
199 nzp
->z_sync_cnt
= ozp
->z_sync_cnt
;
200 nzp
->z_is_sa
= ozp
->z_is_sa
;
201 nzp
->z_sa_hdl
= ozp
->z_sa_hdl
;
202 bcopy(ozp
->z_atime
, nzp
->z_atime
, sizeof (uint64_t) * 2);
203 nzp
->z_links
= ozp
->z_links
;
204 nzp
->z_size
= ozp
->z_size
;
205 nzp
->z_pflags
= ozp
->z_pflags
;
206 nzp
->z_uid
= ozp
->z_uid
;
207 nzp
->z_gid
= ozp
->z_gid
;
208 nzp
->z_mode
= ozp
->z_mode
;
211 * Since this is just an idle znode and kmem is already dealing with
212 * memory pressure, release any cached ACL.
214 if (ozp
->z_acl_cached
) {
215 zfs_acl_free(ozp
->z_acl_cached
);
216 ozp
->z_acl_cached
= NULL
;
219 sa_set_userp(nzp
->z_sa_hdl
, nzp
);
222 * Invalidate the original znode by clearing fields that provide a
223 * pointer back to the znode. Set the low bit of the vfs pointer to
224 * ensure that zfs_znode_move() recognizes the znode as invalid in any
225 * subsequent callback.
227 ozp
->z_sa_hdl
= NULL
;
228 POINTER_INVALIDATE(&ozp
->z_zfsvfs
);
234 ozp
->z_moved
= (uint8_t)-1;
239 zfs_znode_move(void *buf
, void *newbuf
, size_t size
, void *arg
)
241 znode_t
*ozp
= buf
, *nzp
= newbuf
;
246 * The znode is on the file system's list of known znodes if the vfs
247 * pointer is valid. We set the low bit of the vfs pointer when freeing
248 * the znode to invalidate it, and the memory patterns written by kmem
249 * (baddcafe and deadbeef) set at least one of the two low bits. A newly
250 * created znode sets the vfs pointer last of all to indicate that the
251 * znode is known and in a valid state to be moved by this function.
253 zfsvfs
= ozp
->z_zfsvfs
;
254 if (!POINTER_IS_VALID(zfsvfs
)) {
255 ZNODE_STAT_ADD(znode_move_stats
.zms_zfsvfs_invalid
);
256 return (KMEM_CBRC_DONT_KNOW
);
260 * Close a small window in which it's possible that the filesystem could
261 * be unmounted and freed, and zfsvfs, though valid in the previous
262 * statement, could point to unrelated memory by the time we try to
263 * prevent the filesystem from being unmounted.
265 rw_enter(&zfsvfs_lock
, RW_WRITER
);
266 if (zfsvfs
!= ozp
->z_zfsvfs
) {
267 rw_exit(&zfsvfs_lock
);
268 ZNODE_STAT_ADD(znode_move_stats
.zms_zfsvfs_recheck1
);
269 return (KMEM_CBRC_DONT_KNOW
);
273 * If the znode is still valid, then so is the file system. We know that
274 * no valid file system can be freed while we hold zfsvfs_lock, so we
275 * can safely ensure that the filesystem is not and will not be
276 * unmounted. The next statement is equivalent to ZFS_ENTER().
278 rrw_enter(&zfsvfs
->z_teardown_lock
, RW_READER
, FTAG
);
279 if (zfsvfs
->z_unmounted
) {
281 rw_exit(&zfsvfs_lock
);
282 ZNODE_STAT_ADD(znode_move_stats
.zms_zfsvfs_unmounted
);
283 return (KMEM_CBRC_DONT_KNOW
);
285 rw_exit(&zfsvfs_lock
);
287 mutex_enter(&zfsvfs
->z_znodes_lock
);
289 * Recheck the vfs pointer in case the znode was removed just before
290 * acquiring the lock.
292 if (zfsvfs
!= ozp
->z_zfsvfs
) {
293 mutex_exit(&zfsvfs
->z_znodes_lock
);
295 ZNODE_STAT_ADD(znode_move_stats
.zms_zfsvfs_recheck2
);
296 return (KMEM_CBRC_DONT_KNOW
);
300 * At this point we know that as long as we hold z_znodes_lock, the
301 * znode cannot be freed and fields within the znode can be safely
302 * accessed. Now, prevent a race with zfs_zget().
304 if (ZFS_OBJ_HOLD_TRYENTER(zfsvfs
, ozp
->z_id
) == 0) {
305 mutex_exit(&zfsvfs
->z_znodes_lock
);
307 ZNODE_STAT_ADD(znode_move_stats
.zms_obj_held
);
308 return (KMEM_CBRC_LATER
);
312 if (mutex_tryenter(&vp
->v_lock
) == 0) {
313 ZFS_OBJ_HOLD_EXIT(zfsvfs
, ozp
->z_id
);
314 mutex_exit(&zfsvfs
->z_znodes_lock
);
316 ZNODE_STAT_ADD(znode_move_stats
.zms_vnode_locked
);
317 return (KMEM_CBRC_LATER
);
320 /* Only move znodes that are referenced _only_ by the DNLC. */
321 if (vp
->v_count
!= 1 || !vn_in_dnlc(vp
)) {
322 mutex_exit(&vp
->v_lock
);
323 ZFS_OBJ_HOLD_EXIT(zfsvfs
, ozp
->z_id
);
324 mutex_exit(&zfsvfs
->z_znodes_lock
);
326 ZNODE_STAT_ADD(znode_move_stats
.zms_not_only_dnlc
);
327 return (KMEM_CBRC_LATER
);
331 * The znode is known and in a valid state to move. We're holding the
332 * locks needed to execute the critical section.
334 zfs_znode_move_impl(ozp
, nzp
);
335 mutex_exit(&vp
->v_lock
);
336 ZFS_OBJ_HOLD_EXIT(zfsvfs
, ozp
->z_id
);
338 list_link_replace(&ozp
->z_link_node
, &nzp
->z_link_node
);
339 mutex_exit(&zfsvfs
->z_znodes_lock
);
342 return (KMEM_CBRC_YES
);
351 rw_init(&zfsvfs_lock
, NULL
, RW_DEFAULT
, NULL
);
352 ASSERT(znode_cache
== NULL
);
353 znode_cache
= kmem_cache_create("zfs_znode_cache",
354 sizeof (znode_t
), 0, zfs_znode_cache_constructor
,
355 zfs_znode_cache_destructor
, NULL
, NULL
, NULL
, 0);
356 kmem_cache_set_move(znode_cache
, zfs_znode_move
);
363 * Cleanup vfs & vnode ops
365 zfs_remove_op_tables();
371 kmem_cache_destroy(znode_cache
);
373 rw_destroy(&zfsvfs_lock
);
376 struct vnodeops
*zfs_dvnodeops
;
377 struct vnodeops
*zfs_fvnodeops
;
378 struct vnodeops
*zfs_symvnodeops
;
379 struct vnodeops
*zfs_xdvnodeops
;
380 struct vnodeops
*zfs_evnodeops
;
381 struct vnodeops
*zfs_sharevnodeops
;
384 zfs_remove_op_tables()
390 (void) vfs_freevfsops_by_type(zfsfstype
);
397 vn_freevnodeops(zfs_dvnodeops
);
399 vn_freevnodeops(zfs_fvnodeops
);
401 vn_freevnodeops(zfs_symvnodeops
);
403 vn_freevnodeops(zfs_xdvnodeops
);
405 vn_freevnodeops(zfs_evnodeops
);
406 if (zfs_sharevnodeops
)
407 vn_freevnodeops(zfs_sharevnodeops
);
409 zfs_dvnodeops
= NULL
;
410 zfs_fvnodeops
= NULL
;
411 zfs_symvnodeops
= NULL
;
412 zfs_xdvnodeops
= NULL
;
413 zfs_evnodeops
= NULL
;
414 zfs_sharevnodeops
= NULL
;
417 extern const fs_operation_def_t zfs_dvnodeops_template
[];
418 extern const fs_operation_def_t zfs_fvnodeops_template
[];
419 extern const fs_operation_def_t zfs_xdvnodeops_template
[];
420 extern const fs_operation_def_t zfs_symvnodeops_template
[];
421 extern const fs_operation_def_t zfs_evnodeops_template
[];
422 extern const fs_operation_def_t zfs_sharevnodeops_template
[];
425 zfs_create_op_tables()
430 * zfs_dvnodeops can be set if mod_remove() calls mod_installfs()
431 * due to a failure to remove the the 2nd modlinkage (zfs_modldrv).
432 * In this case we just return as the ops vectors are already set up.
437 error
= vn_make_ops(MNTTYPE_ZFS
, zfs_dvnodeops_template
,
442 error
= vn_make_ops(MNTTYPE_ZFS
, zfs_fvnodeops_template
,
447 error
= vn_make_ops(MNTTYPE_ZFS
, zfs_symvnodeops_template
,
452 error
= vn_make_ops(MNTTYPE_ZFS
, zfs_xdvnodeops_template
,
457 error
= vn_make_ops(MNTTYPE_ZFS
, zfs_evnodeops_template
,
462 error
= vn_make_ops(MNTTYPE_ZFS
, zfs_sharevnodeops_template
,
469 zfs_create_share_dir(zfsvfs_t
*zfsvfs
, dmu_tx_t
*tx
)
471 zfs_acl_ids_t acl_ids
;
478 vattr
.va_mask
= AT_MODE
|AT_UID
|AT_GID
|AT_TYPE
;
479 vattr
.va_type
= VDIR
;
480 vattr
.va_mode
= S_IFDIR
|0555;
481 vattr
.va_uid
= crgetuid(kcred
);
482 vattr
.va_gid
= crgetgid(kcred
);
484 sharezp
= kmem_cache_alloc(znode_cache
, KM_SLEEP
);
485 ASSERT(!POINTER_IS_VALID(sharezp
->z_zfsvfs
));
486 sharezp
->z_moved
= 0;
487 sharezp
->z_unlinked
= 0;
488 sharezp
->z_atime_dirty
= 0;
489 sharezp
->z_zfsvfs
= zfsvfs
;
490 sharezp
->z_is_sa
= zfsvfs
->z_use_sa
;
496 VERIFY(0 == zfs_acl_ids_create(sharezp
, IS_ROOT_NODE
, &vattr
,
497 kcred
, NULL
, &acl_ids
));
498 zfs_mknode(sharezp
, &vattr
, tx
, kcred
, IS_ROOT_NODE
, &zp
, &acl_ids
);
499 ASSERT3P(zp
, ==, sharezp
);
500 ASSERT(!vn_in_dnlc(ZTOV(sharezp
))); /* not valid to move */
501 POINTER_INVALIDATE(&sharezp
->z_zfsvfs
);
502 error
= zap_add(zfsvfs
->z_os
, MASTER_NODE_OBJ
,
503 ZFS_SHARES_DIR
, 8, 1, &sharezp
->z_id
, tx
);
504 zfsvfs
->z_shares_dir
= sharezp
->z_id
;
506 zfs_acl_ids_free(&acl_ids
);
507 ZTOV(sharezp
)->v_count
= 0;
508 sa_handle_destroy(sharezp
->z_sa_hdl
);
509 kmem_cache_free(znode_cache
, sharezp
);
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_sa_init(zfsvfs_t
*zfsvfs
, znode_t
*zp
,
573 dmu_buf_t
*db
, dmu_object_type_t obj_type
, sa_handle_t
*sa_hdl
)
575 ASSERT(!POINTER_IS_VALID(zp
->z_zfsvfs
) || (zfsvfs
== zp
->z_zfsvfs
));
576 ASSERT(MUTEX_HELD(ZFS_OBJ_MUTEX(zfsvfs
, zp
->z_id
)));
578 mutex_enter(&zp
->z_lock
);
580 ASSERT(zp
->z_sa_hdl
== NULL
);
581 ASSERT(zp
->z_acl_cached
== NULL
);
582 if (sa_hdl
== NULL
) {
583 VERIFY(0 == sa_handle_get_from_db(zfsvfs
->z_os
, db
, zp
,
584 SA_HDL_SHARED
, &zp
->z_sa_hdl
));
586 zp
->z_sa_hdl
= sa_hdl
;
587 sa_set_userp(sa_hdl
, zp
);
590 zp
->z_is_sa
= (obj_type
== DMU_OT_SA
) ? B_TRUE
: B_FALSE
;
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 ASSERT(MUTEX_HELD(ZFS_OBJ_MUTEX(zp
->z_zfsvfs
, zp
->z_id
)) ||
607 RW_WRITE_HELD(&zp
->z_zfsvfs
->z_teardown_inactive_lock
));
609 sa_handle_destroy(zp
->z_sa_hdl
);
614 * Construct a new znode/vnode and intialize.
616 * This does not do a call to dmu_set_user() that is
617 * up to the caller to do, in case you don't want to
621 zfs_znode_alloc(zfsvfs_t
*zfsvfs
, dmu_buf_t
*db
, int blksz
,
622 dmu_object_type_t obj_type
, sa_handle_t
*hdl
)
628 sa_bulk_attr_t bulk
[9];
631 zp
= kmem_cache_alloc(znode_cache
, KM_SLEEP
);
633 ASSERT(zp
->z_dirlocks
== NULL
);
634 ASSERT(!POINTER_IS_VALID(zp
->z_zfsvfs
));
638 * Defer setting z_zfsvfs until the znode is ready to be a candidate for
639 * the zfs_znode_move() callback.
643 zp
->z_atime_dirty
= 0;
645 zp
->z_id
= db
->db_object
;
647 zp
->z_seq
= 0x7A4653;
653 zfs_znode_sa_init(zfsvfs
, zp
, db
, obj_type
, hdl
);
655 SA_ADD_BULK_ATTR(bulk
, count
, SA_ZPL_MODE(zfsvfs
), NULL
, &mode
, 8);
656 SA_ADD_BULK_ATTR(bulk
, count
, SA_ZPL_GEN(zfsvfs
), NULL
, &zp
->z_gen
, 8);
657 SA_ADD_BULK_ATTR(bulk
, count
, SA_ZPL_SIZE(zfsvfs
), NULL
,
659 SA_ADD_BULK_ATTR(bulk
, count
, SA_ZPL_LINKS(zfsvfs
), NULL
,
661 SA_ADD_BULK_ATTR(bulk
, count
, SA_ZPL_FLAGS(zfsvfs
), NULL
,
663 SA_ADD_BULK_ATTR(bulk
, count
, SA_ZPL_PARENT(zfsvfs
), NULL
, &parent
, 8);
664 SA_ADD_BULK_ATTR(bulk
, count
, SA_ZPL_ATIME(zfsvfs
), NULL
,
666 SA_ADD_BULK_ATTR(bulk
, count
, SA_ZPL_UID(zfsvfs
), NULL
,
668 SA_ADD_BULK_ATTR(bulk
, count
, SA_ZPL_GID(zfsvfs
), NULL
,
671 if (sa_bulk_lookup(zp
->z_sa_hdl
, bulk
, count
) != 0 || zp
->z_gen
== 0) {
673 sa_handle_destroy(zp
->z_sa_hdl
);
674 kmem_cache_free(znode_cache
, zp
);
679 vp
->v_vfsp
= zfsvfs
->z_parent
->z_vfs
;
681 vp
->v_type
= IFTOVT((mode_t
)mode
);
683 switch (vp
->v_type
) {
685 if (zp
->z_pflags
& ZFS_XATTR
) {
686 vn_setops(vp
, zfs_xdvnodeops
);
687 vp
->v_flag
|= V_XATTRDIR
;
689 vn_setops(vp
, zfs_dvnodeops
);
691 zp
->z_zn_prefetch
= B_TRUE
; /* z_prefetch default is enabled */
697 VERIFY(sa_lookup(zp
->z_sa_hdl
, SA_ZPL_RDEV(zfsvfs
),
698 &rdev
, sizeof (rdev
)) == 0);
700 vp
->v_rdev
= zfs_cmpldev(rdev
);
706 vn_setops(vp
, zfs_fvnodeops
);
709 vp
->v_flag
|= VMODSORT
;
710 if (parent
== zfsvfs
->z_shares_dir
) {
711 ASSERT(zp
->z_uid
== 0 && zp
->z_gid
== 0);
712 vn_setops(vp
, zfs_sharevnodeops
);
714 vn_setops(vp
, zfs_fvnodeops
);
718 vn_setops(vp
, zfs_symvnodeops
);
721 vn_setops(vp
, zfs_evnodeops
);
725 mutex_enter(&zfsvfs
->z_znodes_lock
);
726 list_insert_tail(&zfsvfs
->z_all_znodes
, zp
);
729 * Everything else must be valid before assigning z_zfsvfs makes the
730 * znode eligible for zfs_znode_move().
732 zp
->z_zfsvfs
= zfsvfs
;
733 mutex_exit(&zfsvfs
->z_znodes_lock
);
735 VFS_HOLD(zfsvfs
->z_vfs
);
739 static uint64_t empty_xattr
;
740 static uint64_t pad
[4];
741 static zfs_acl_phys_t acl_phys
;
743 * Create a new DMU object to hold a zfs znode.
745 * IN: dzp - parent directory for new znode
746 * vap - file attributes for new znode
747 * tx - dmu transaction id for zap operations
748 * cr - credentials of caller
750 * IS_ROOT_NODE - new object will be root
751 * IS_XATTR - new object is an attribute
752 * bonuslen - length of bonus buffer
753 * setaclp - File/Dir initial ACL
754 * fuidp - Tracks fuid allocation.
756 * OUT: zpp - allocated znode
760 zfs_mknode(znode_t
*dzp
, vattr_t
*vap
, dmu_tx_t
*tx
, cred_t
*cr
,
761 uint_t flag
, znode_t
**zpp
, zfs_acl_ids_t
*acl_ids
)
763 uint64_t crtime
[2], atime
[2], mtime
[2], ctime
[2];
764 uint64_t mode
, size
, links
, parent
, pflags
;
765 uint64_t dzp_pflags
= 0;
767 zfsvfs_t
*zfsvfs
= dzp
->z_zfsvfs
;
774 dmu_object_type_t obj_type
;
775 sa_bulk_attr_t sa_attrs
[ZPL_END
];
777 zfs_acl_locator_cb_t locate
= { 0 };
779 ASSERT(vap
&& (vap
->va_mask
& (AT_TYPE
|AT_MODE
)) == (AT_TYPE
|AT_MODE
));
781 if (zfsvfs
->z_replay
) {
782 obj
= vap
->va_nodeid
;
783 now
= vap
->va_ctime
; /* see zfs_replay_create() */
784 gen
= vap
->va_nblocks
; /* ditto */
788 gen
= dmu_tx_get_txg(tx
);
791 obj_type
= zfsvfs
->z_use_sa
? DMU_OT_SA
: DMU_OT_ZNODE
;
792 bonuslen
= (obj_type
== DMU_OT_SA
) ?
793 DN_MAX_BONUSLEN
: ZFS_OLD_ZNODE_PHYS_SIZE
;
796 * Create a new DMU object.
799 * There's currently no mechanism for pre-reading the blocks that will
800 * be needed to allocate a new object, so we accept the small chance
801 * that there will be an i/o error and we will fail one of the
804 if (vap
->va_type
== VDIR
) {
805 if (zfsvfs
->z_replay
) {
806 err
= zap_create_claim_norm(zfsvfs
->z_os
, obj
,
807 zfsvfs
->z_norm
, DMU_OT_DIRECTORY_CONTENTS
,
808 obj_type
, bonuslen
, tx
);
809 ASSERT3U(err
, ==, 0);
811 obj
= zap_create_norm(zfsvfs
->z_os
,
812 zfsvfs
->z_norm
, DMU_OT_DIRECTORY_CONTENTS
,
813 obj_type
, bonuslen
, tx
);
816 if (zfsvfs
->z_replay
) {
817 err
= dmu_object_claim(zfsvfs
->z_os
, obj
,
818 DMU_OT_PLAIN_FILE_CONTENTS
, 0,
819 obj_type
, bonuslen
, tx
);
820 ASSERT3U(err
, ==, 0);
822 obj
= dmu_object_alloc(zfsvfs
->z_os
,
823 DMU_OT_PLAIN_FILE_CONTENTS
, 0,
824 obj_type
, bonuslen
, tx
);
828 ZFS_OBJ_HOLD_ENTER(zfsvfs
, obj
);
829 VERIFY(0 == sa_buf_hold(zfsvfs
->z_os
, obj
, NULL
, &db
));
832 * If this is the root, fix up the half-initialized parent pointer
833 * to reference the just-allocated physical data area.
835 if (flag
& IS_ROOT_NODE
) {
838 dzp_pflags
= dzp
->z_pflags
;
842 * If parent is an xattr, so am I.
844 if (dzp_pflags
& ZFS_XATTR
) {
848 if (zfsvfs
->z_use_fuids
)
849 pflags
= ZFS_ARCHIVE
| ZFS_AV_MODIFIED
;
853 if (vap
->va_type
== VDIR
) {
854 size
= 2; /* contents ("." and "..") */
855 links
= (flag
& (IS_ROOT_NODE
| IS_XATTR
)) ? 2 : 1;
860 if (vap
->va_type
== VBLK
|| vap
->va_type
== VCHR
) {
861 rdev
= zfs_expldev(vap
->va_rdev
);
865 mode
= acl_ids
->z_mode
;
870 * No execs denied will be deterimed when zfs_mode_compute() is called.
872 pflags
|= acl_ids
->z_aclp
->z_hints
&
873 (ZFS_ACL_TRIVIAL
|ZFS_INHERIT_ACE
|ZFS_ACL_AUTO_INHERIT
|
874 ZFS_ACL_DEFAULTED
|ZFS_ACL_PROTECTED
);
876 ZFS_TIME_ENCODE(&now
, crtime
);
877 ZFS_TIME_ENCODE(&now
, ctime
);
879 if (vap
->va_mask
& AT_ATIME
) {
880 ZFS_TIME_ENCODE(&vap
->va_atime
, atime
);
882 ZFS_TIME_ENCODE(&now
, atime
);
885 if (vap
->va_mask
& AT_MTIME
) {
886 ZFS_TIME_ENCODE(&vap
->va_mtime
, mtime
);
888 ZFS_TIME_ENCODE(&now
, mtime
);
891 /* Now add in all of the "SA" attributes */
892 VERIFY(0 == sa_handle_get_from_db(zfsvfs
->z_os
, db
, NULL
, SA_HDL_SHARED
,
896 * Setup the array of attributes to be replaced/set on the new file
898 * order for DMU_OT_ZNODE is critical since it needs to be constructed
899 * in the old znode_phys_t format. Don't change this ordering
902 if (obj_type
== DMU_OT_ZNODE
) {
903 SA_ADD_BULK_ATTR(sa_attrs
, cnt
, SA_ZPL_ATIME(zfsvfs
),
905 SA_ADD_BULK_ATTR(sa_attrs
, cnt
, SA_ZPL_MTIME(zfsvfs
),
907 SA_ADD_BULK_ATTR(sa_attrs
, cnt
, SA_ZPL_CTIME(zfsvfs
),
909 SA_ADD_BULK_ATTR(sa_attrs
, cnt
, SA_ZPL_CRTIME(zfsvfs
),
911 SA_ADD_BULK_ATTR(sa_attrs
, cnt
, SA_ZPL_GEN(zfsvfs
),
913 SA_ADD_BULK_ATTR(sa_attrs
, cnt
, SA_ZPL_MODE(zfsvfs
),
915 SA_ADD_BULK_ATTR(sa_attrs
, cnt
, SA_ZPL_SIZE(zfsvfs
),
917 SA_ADD_BULK_ATTR(sa_attrs
, cnt
, SA_ZPL_PARENT(zfsvfs
),
920 SA_ADD_BULK_ATTR(sa_attrs
, cnt
, SA_ZPL_MODE(zfsvfs
),
922 SA_ADD_BULK_ATTR(sa_attrs
, cnt
, SA_ZPL_SIZE(zfsvfs
),
924 SA_ADD_BULK_ATTR(sa_attrs
, cnt
, SA_ZPL_GEN(zfsvfs
),
926 SA_ADD_BULK_ATTR(sa_attrs
, cnt
, SA_ZPL_UID(zfsvfs
), NULL
,
927 &acl_ids
->z_fuid
, 8);
928 SA_ADD_BULK_ATTR(sa_attrs
, cnt
, SA_ZPL_GID(zfsvfs
), NULL
,
929 &acl_ids
->z_fgid
, 8);
930 SA_ADD_BULK_ATTR(sa_attrs
, cnt
, SA_ZPL_PARENT(zfsvfs
),
932 SA_ADD_BULK_ATTR(sa_attrs
, cnt
, SA_ZPL_FLAGS(zfsvfs
),
934 SA_ADD_BULK_ATTR(sa_attrs
, cnt
, SA_ZPL_ATIME(zfsvfs
),
936 SA_ADD_BULK_ATTR(sa_attrs
, cnt
, SA_ZPL_MTIME(zfsvfs
),
938 SA_ADD_BULK_ATTR(sa_attrs
, cnt
, SA_ZPL_CTIME(zfsvfs
),
940 SA_ADD_BULK_ATTR(sa_attrs
, cnt
, SA_ZPL_CRTIME(zfsvfs
),
944 SA_ADD_BULK_ATTR(sa_attrs
, cnt
, SA_ZPL_LINKS(zfsvfs
), NULL
, &links
, 8);
946 if (obj_type
== DMU_OT_ZNODE
) {
947 SA_ADD_BULK_ATTR(sa_attrs
, cnt
, SA_ZPL_XATTR(zfsvfs
), NULL
,
950 if (obj_type
== DMU_OT_ZNODE
||
951 (vap
->va_type
== VBLK
|| vap
->va_type
== VCHR
)) {
952 SA_ADD_BULK_ATTR(sa_attrs
, cnt
, SA_ZPL_RDEV(zfsvfs
),
956 if (obj_type
== DMU_OT_ZNODE
) {
957 SA_ADD_BULK_ATTR(sa_attrs
, cnt
, SA_ZPL_FLAGS(zfsvfs
),
959 SA_ADD_BULK_ATTR(sa_attrs
, cnt
, SA_ZPL_UID(zfsvfs
), NULL
,
960 &acl_ids
->z_fuid
, 8);
961 SA_ADD_BULK_ATTR(sa_attrs
, cnt
, SA_ZPL_GID(zfsvfs
), NULL
,
962 &acl_ids
->z_fgid
, 8);
963 SA_ADD_BULK_ATTR(sa_attrs
, cnt
, SA_ZPL_PAD(zfsvfs
), NULL
, pad
,
964 sizeof (uint64_t) * 4);
965 SA_ADD_BULK_ATTR(sa_attrs
, cnt
, SA_ZPL_ZNODE_ACL(zfsvfs
), NULL
,
966 &acl_phys
, sizeof (zfs_acl_phys_t
));
967 } else if (acl_ids
->z_aclp
->z_version
>= ZFS_ACL_VERSION_FUID
) {
968 SA_ADD_BULK_ATTR(sa_attrs
, cnt
, SA_ZPL_DACL_COUNT(zfsvfs
), NULL
,
969 &acl_ids
->z_aclp
->z_acl_count
, 8);
970 locate
.cb_aclp
= acl_ids
->z_aclp
;
971 SA_ADD_BULK_ATTR(sa_attrs
, cnt
, SA_ZPL_DACL_ACES(zfsvfs
),
972 zfs_acl_data_locator
, &locate
,
973 acl_ids
->z_aclp
->z_acl_bytes
);
974 mode
= zfs_mode_compute(mode
, acl_ids
->z_aclp
, &pflags
,
975 acl_ids
->z_fuid
, acl_ids
->z_fgid
);
978 VERIFY(sa_replace_all_by_template(sa_hdl
, sa_attrs
, cnt
, tx
) == 0);
980 if (!(flag
& IS_ROOT_NODE
)) {
981 *zpp
= zfs_znode_alloc(zfsvfs
, db
, 0, obj_type
, sa_hdl
);
982 ASSERT(*zpp
!= NULL
);
985 * If we are creating the root node, the "parent" we
986 * passed in is the znode for the root.
990 (*zpp
)->z_sa_hdl
= sa_hdl
;
993 (*zpp
)->z_pflags
= pflags
;
994 (*zpp
)->z_mode
= mode
;
996 if (vap
->va_mask
& AT_XVATTR
)
997 zfs_xvattr_set(*zpp
, (xvattr_t
*)vap
, tx
);
999 if (obj_type
== DMU_OT_ZNODE
||
1000 acl_ids
->z_aclp
->z_version
< ZFS_ACL_VERSION_FUID
) {
1001 err
= zfs_aclset_common(*zpp
, acl_ids
->z_aclp
, cr
, tx
);
1002 ASSERT3P(err
, ==, 0);
1004 ZFS_OBJ_HOLD_EXIT(zfsvfs
, obj
);
1008 * zfs_xvattr_set only updates the in-core attributes
1009 * it is assumed the caller will be doing an sa_bulk_update
1010 * to push the changes out
1013 zfs_xvattr_set(znode_t
*zp
, xvattr_t
*xvap
, dmu_tx_t
*tx
)
1017 xoap
= xva_getxoptattr(xvap
);
1020 if (XVA_ISSET_REQ(xvap
, XAT_CREATETIME
)) {
1022 ZFS_TIME_ENCODE(&xoap
->xoa_createtime
, times
);
1023 (void) sa_update(zp
->z_sa_hdl
, SA_ZPL_CRTIME(zp
->z_zfsvfs
),
1024 ×
, sizeof (times
), tx
);
1025 XVA_SET_RTN(xvap
, XAT_CREATETIME
);
1027 if (XVA_ISSET_REQ(xvap
, XAT_READONLY
)) {
1028 ZFS_ATTR_SET(zp
, ZFS_READONLY
, xoap
->xoa_readonly
,
1030 XVA_SET_RTN(xvap
, XAT_READONLY
);
1032 if (XVA_ISSET_REQ(xvap
, XAT_HIDDEN
)) {
1033 ZFS_ATTR_SET(zp
, ZFS_HIDDEN
, xoap
->xoa_hidden
,
1035 XVA_SET_RTN(xvap
, XAT_HIDDEN
);
1037 if (XVA_ISSET_REQ(xvap
, XAT_SYSTEM
)) {
1038 ZFS_ATTR_SET(zp
, ZFS_SYSTEM
, xoap
->xoa_system
,
1040 XVA_SET_RTN(xvap
, XAT_SYSTEM
);
1042 if (XVA_ISSET_REQ(xvap
, XAT_ARCHIVE
)) {
1043 ZFS_ATTR_SET(zp
, ZFS_ARCHIVE
, xoap
->xoa_archive
,
1045 XVA_SET_RTN(xvap
, XAT_ARCHIVE
);
1047 if (XVA_ISSET_REQ(xvap
, XAT_IMMUTABLE
)) {
1048 ZFS_ATTR_SET(zp
, ZFS_IMMUTABLE
, xoap
->xoa_immutable
,
1050 XVA_SET_RTN(xvap
, XAT_IMMUTABLE
);
1052 if (XVA_ISSET_REQ(xvap
, XAT_NOUNLINK
)) {
1053 ZFS_ATTR_SET(zp
, ZFS_NOUNLINK
, xoap
->xoa_nounlink
,
1055 XVA_SET_RTN(xvap
, XAT_NOUNLINK
);
1057 if (XVA_ISSET_REQ(xvap
, XAT_APPENDONLY
)) {
1058 ZFS_ATTR_SET(zp
, ZFS_APPENDONLY
, xoap
->xoa_appendonly
,
1060 XVA_SET_RTN(xvap
, XAT_APPENDONLY
);
1062 if (XVA_ISSET_REQ(xvap
, XAT_NODUMP
)) {
1063 ZFS_ATTR_SET(zp
, ZFS_NODUMP
, xoap
->xoa_nodump
,
1065 XVA_SET_RTN(xvap
, XAT_NODUMP
);
1067 if (XVA_ISSET_REQ(xvap
, XAT_OPAQUE
)) {
1068 ZFS_ATTR_SET(zp
, ZFS_OPAQUE
, xoap
->xoa_opaque
,
1070 XVA_SET_RTN(xvap
, XAT_OPAQUE
);
1072 if (XVA_ISSET_REQ(xvap
, XAT_AV_QUARANTINED
)) {
1073 ZFS_ATTR_SET(zp
, ZFS_AV_QUARANTINED
,
1074 xoap
->xoa_av_quarantined
, zp
->z_pflags
, tx
);
1075 XVA_SET_RTN(xvap
, XAT_AV_QUARANTINED
);
1077 if (XVA_ISSET_REQ(xvap
, XAT_AV_MODIFIED
)) {
1078 ZFS_ATTR_SET(zp
, ZFS_AV_MODIFIED
, xoap
->xoa_av_modified
,
1080 XVA_SET_RTN(xvap
, XAT_AV_MODIFIED
);
1082 if (XVA_ISSET_REQ(xvap
, XAT_AV_SCANSTAMP
)) {
1083 zfs_sa_set_scanstamp(zp
, xvap
, tx
);
1084 XVA_SET_RTN(xvap
, XAT_AV_SCANSTAMP
);
1086 if (XVA_ISSET_REQ(xvap
, XAT_REPARSE
)) {
1087 ZFS_ATTR_SET(zp
, ZFS_REPARSE
, xoap
->xoa_reparse
,
1089 XVA_SET_RTN(xvap
, XAT_REPARSE
);
1091 if (XVA_ISSET_REQ(xvap
, XAT_OFFLINE
)) {
1092 ZFS_ATTR_SET(zp
, ZFS_OFFLINE
, xoap
->xoa_offline
,
1094 XVA_SET_RTN(xvap
, XAT_OFFLINE
);
1096 if (XVA_ISSET_REQ(xvap
, XAT_SPARSE
)) {
1097 ZFS_ATTR_SET(zp
, ZFS_SPARSE
, xoap
->xoa_sparse
,
1099 XVA_SET_RTN(xvap
, XAT_SPARSE
);
1104 zfs_zget(zfsvfs_t
*zfsvfs
, uint64_t obj_num
, znode_t
**zpp
)
1106 dmu_object_info_t doi
;
1114 ZFS_OBJ_HOLD_ENTER(zfsvfs
, obj_num
);
1116 err
= sa_buf_hold(zfsvfs
->z_os
, obj_num
, NULL
, &db
);
1118 ZFS_OBJ_HOLD_EXIT(zfsvfs
, obj_num
);
1122 dmu_object_info_from_db(db
, &doi
);
1123 if (doi
.doi_bonus_type
!= DMU_OT_SA
&&
1124 (doi
.doi_bonus_type
!= DMU_OT_ZNODE
||
1125 (doi
.doi_bonus_type
== DMU_OT_ZNODE
&&
1126 doi
.doi_bonus_size
< sizeof (znode_phys_t
)))) {
1127 sa_buf_rele(db
, NULL
);
1128 ZFS_OBJ_HOLD_EXIT(zfsvfs
, obj_num
);
1132 hdl
= dmu_buf_get_user(db
);
1134 zp
= sa_get_userdata(hdl
);
1138 * Since "SA" does immediate eviction we
1139 * should never find a sa handle that doesn't
1140 * know about the znode.
1143 ASSERT3P(zp
, !=, NULL
);
1145 mutex_enter(&zp
->z_lock
);
1146 ASSERT3U(zp
->z_id
, ==, obj_num
);
1147 if (zp
->z_unlinked
) {
1154 sa_buf_rele(db
, NULL
);
1155 mutex_exit(&zp
->z_lock
);
1156 ZFS_OBJ_HOLD_EXIT(zfsvfs
, obj_num
);
1161 * Not found create new znode/vnode
1162 * but only if file exists.
1164 * There is a small window where zfs_vget() could
1165 * find this object while a file create is still in
1166 * progress. This is checked for in zfs_znode_alloc()
1168 * if zfs_znode_alloc() fails it will drop the hold on the
1171 zp
= zfs_znode_alloc(zfsvfs
, db
, doi
.doi_data_block_size
,
1172 doi
.doi_bonus_type
, NULL
);
1178 ZFS_OBJ_HOLD_EXIT(zfsvfs
, obj_num
);
1183 zfs_rezget(znode_t
*zp
)
1185 zfsvfs_t
*zfsvfs
= zp
->z_zfsvfs
;
1186 dmu_object_info_t doi
;
1188 uint64_t obj_num
= zp
->z_id
;
1190 sa_bulk_attr_t bulk
[8];
1195 ZFS_OBJ_HOLD_ENTER(zfsvfs
, obj_num
);
1197 mutex_enter(&zp
->z_acl_lock
);
1198 if (zp
->z_acl_cached
) {
1199 zfs_acl_free(zp
->z_acl_cached
);
1200 zp
->z_acl_cached
= NULL
;
1203 mutex_exit(&zp
->z_acl_lock
);
1204 ASSERT(zp
->z_sa_hdl
== NULL
);
1205 err
= sa_buf_hold(zfsvfs
->z_os
, obj_num
, NULL
, &db
);
1207 ZFS_OBJ_HOLD_EXIT(zfsvfs
, obj_num
);
1211 dmu_object_info_from_db(db
, &doi
);
1212 if (doi
.doi_bonus_type
!= DMU_OT_SA
&&
1213 (doi
.doi_bonus_type
!= DMU_OT_ZNODE
||
1214 (doi
.doi_bonus_type
== DMU_OT_ZNODE
&&
1215 doi
.doi_bonus_size
< sizeof (znode_phys_t
)))) {
1216 sa_buf_rele(db
, NULL
);
1217 ZFS_OBJ_HOLD_EXIT(zfsvfs
, obj_num
);
1221 zfs_znode_sa_init(zfsvfs
, zp
, db
, doi
.doi_bonus_type
, NULL
);
1223 /* reload cached values */
1224 SA_ADD_BULK_ATTR(bulk
, count
, SA_ZPL_GEN(zfsvfs
), NULL
,
1225 &gen
, sizeof (gen
));
1226 SA_ADD_BULK_ATTR(bulk
, count
, SA_ZPL_SIZE(zfsvfs
), NULL
,
1227 &zp
->z_size
, sizeof (zp
->z_size
));
1228 SA_ADD_BULK_ATTR(bulk
, count
, SA_ZPL_LINKS(zfsvfs
), NULL
,
1229 &zp
->z_links
, sizeof (zp
->z_links
));
1230 SA_ADD_BULK_ATTR(bulk
, count
, SA_ZPL_FLAGS(zfsvfs
), NULL
,
1231 &zp
->z_pflags
, sizeof (zp
->z_pflags
));
1232 SA_ADD_BULK_ATTR(bulk
, count
, SA_ZPL_ATIME(zfsvfs
), NULL
,
1233 &zp
->z_atime
, sizeof (zp
->z_atime
));
1234 SA_ADD_BULK_ATTR(bulk
, count
, SA_ZPL_UID(zfsvfs
), NULL
,
1235 &zp
->z_uid
, sizeof (zp
->z_uid
));
1236 SA_ADD_BULK_ATTR(bulk
, count
, SA_ZPL_GID(zfsvfs
), NULL
,
1237 &zp
->z_gid
, sizeof (zp
->z_gid
));
1238 SA_ADD_BULK_ATTR(bulk
, count
, SA_ZPL_MODE(zfsvfs
), NULL
,
1239 &mode
, sizeof (mode
));
1241 if (sa_bulk_lookup(zp
->z_sa_hdl
, bulk
, count
)) {
1242 zfs_znode_dmu_fini(zp
);
1243 ZFS_OBJ_HOLD_EXIT(zfsvfs
, obj_num
);
1249 if (gen
!= zp
->z_gen
) {
1250 zfs_znode_dmu_fini(zp
);
1251 ZFS_OBJ_HOLD_EXIT(zfsvfs
, obj_num
);
1255 zp
->z_unlinked
= (zp
->z_links
== 0);
1256 zp
->z_blksz
= doi
.doi_data_block_size
;
1258 ZFS_OBJ_HOLD_EXIT(zfsvfs
, obj_num
);
1264 zfs_znode_delete(znode_t
*zp
, dmu_tx_t
*tx
)
1266 zfsvfs_t
*zfsvfs
= zp
->z_zfsvfs
;
1267 objset_t
*os
= zfsvfs
->z_os
;
1268 uint64_t obj
= zp
->z_id
;
1269 uint64_t acl_obj
= zfs_external_acl(zp
);
1271 ZFS_OBJ_HOLD_ENTER(zfsvfs
, obj
);
1273 VERIFY(!zp
->z_is_sa
);
1274 VERIFY(0 == dmu_object_free(os
, acl_obj
, tx
));
1276 VERIFY(0 == dmu_object_free(os
, obj
, tx
));
1277 zfs_znode_dmu_fini(zp
);
1278 ZFS_OBJ_HOLD_EXIT(zfsvfs
, obj
);
1283 zfs_zinactive(znode_t
*zp
)
1285 vnode_t
*vp
= ZTOV(zp
);
1286 zfsvfs_t
*zfsvfs
= zp
->z_zfsvfs
;
1287 uint64_t z_id
= zp
->z_id
;
1289 ASSERT(zp
->z_sa_hdl
);
1292 * Don't allow a zfs_zget() while were trying to release this znode
1294 ZFS_OBJ_HOLD_ENTER(zfsvfs
, z_id
);
1296 mutex_enter(&zp
->z_lock
);
1297 mutex_enter(&vp
->v_lock
);
1299 if (vp
->v_count
> 0 || vn_has_cached_data(vp
)) {
1301 * If the hold count is greater than zero, somebody has
1302 * obtained a new reference on this znode while we were
1303 * processing it here, so we are done. If we still have
1304 * mapped pages then we are also done, since we don't
1305 * want to inactivate the znode until the pages get pushed.
1307 * XXX - if vn_has_cached_data(vp) is true, but count == 0,
1308 * this seems like it would leave the znode hanging with
1309 * no chance to go inactive...
1311 mutex_exit(&vp
->v_lock
);
1312 mutex_exit(&zp
->z_lock
);
1313 ZFS_OBJ_HOLD_EXIT(zfsvfs
, z_id
);
1316 mutex_exit(&vp
->v_lock
);
1319 * If this was the last reference to a file with no links,
1320 * remove the file from the file system.
1322 if (zp
->z_unlinked
) {
1323 mutex_exit(&zp
->z_lock
);
1324 ZFS_OBJ_HOLD_EXIT(zfsvfs
, z_id
);
1329 mutex_exit(&zp
->z_lock
);
1330 zfs_znode_dmu_fini(zp
);
1331 ZFS_OBJ_HOLD_EXIT(zfsvfs
, z_id
);
1336 zfs_znode_free(znode_t
*zp
)
1338 zfsvfs_t
*zfsvfs
= zp
->z_zfsvfs
;
1340 vn_invalid(ZTOV(zp
));
1342 ASSERT(ZTOV(zp
)->v_count
== 0);
1344 mutex_enter(&zfsvfs
->z_znodes_lock
);
1345 POINTER_INVALIDATE(&zp
->z_zfsvfs
);
1346 list_remove(&zfsvfs
->z_all_znodes
, zp
);
1347 mutex_exit(&zfsvfs
->z_znodes_lock
);
1349 if (zp
->z_acl_cached
) {
1350 zfs_acl_free(zp
->z_acl_cached
);
1351 zp
->z_acl_cached
= NULL
;
1354 kmem_cache_free(znode_cache
, zp
);
1356 VFS_RELE(zfsvfs
->z_vfs
);
1360 zfs_tstamp_update_setup(znode_t
*zp
, uint_t flag
, uint64_t mtime
[2],
1361 uint64_t ctime
[2], boolean_t have_tx
)
1367 if (have_tx
) { /* will sa_bulk_update happen really soon? */
1368 zp
->z_atime_dirty
= 0;
1371 zp
->z_atime_dirty
= 1;
1374 if (flag
& AT_ATIME
) {
1375 ZFS_TIME_ENCODE(&now
, zp
->z_atime
);
1378 if (flag
& AT_MTIME
) {
1379 ZFS_TIME_ENCODE(&now
, mtime
);
1380 if (zp
->z_zfsvfs
->z_use_fuids
) {
1381 zp
->z_pflags
|= (ZFS_ARCHIVE
|
1386 if (flag
& AT_CTIME
) {
1387 ZFS_TIME_ENCODE(&now
, ctime
);
1388 if (zp
->z_zfsvfs
->z_use_fuids
)
1389 zp
->z_pflags
|= ZFS_ARCHIVE
;
1394 * Grow the block size for a file.
1396 * IN: zp - znode of file to free data in.
1397 * size - requested block size
1398 * tx - open transaction.
1400 * NOTE: this function assumes that the znode is write locked.
1403 zfs_grow_blocksize(znode_t
*zp
, uint64_t size
, dmu_tx_t
*tx
)
1408 if (size
<= zp
->z_blksz
)
1411 * If the file size is already greater than the current blocksize,
1412 * we will not grow. If there is more than one block in a file,
1413 * the blocksize cannot change.
1415 if (zp
->z_blksz
&& zp
->z_size
> zp
->z_blksz
)
1418 error
= dmu_object_set_blocksize(zp
->z_zfsvfs
->z_os
, zp
->z_id
,
1421 if (error
== ENOTSUP
)
1423 ASSERT3U(error
, ==, 0);
1425 /* What blocksize did we actually get? */
1426 dmu_object_size_from_db(sa_get_db(zp
->z_sa_hdl
), &zp
->z_blksz
, &dummy
);
1430 * This is a dummy interface used when pvn_vplist_dirty() should *not*
1431 * be calling back into the fs for a putpage(). E.g.: when truncating
1432 * a file, the pages being "thrown away* don't need to be written out.
1436 zfs_no_putpage(vnode_t
*vp
, page_t
*pp
, u_offset_t
*offp
, size_t *lenp
,
1437 int flags
, cred_t
*cr
)
1444 * Increase the file length
1446 * IN: zp - znode of file to free data in.
1447 * end - new end-of-file
1449 * RETURN: 0 if success
1450 * error code if failure
1453 zfs_extend(znode_t
*zp
, uint64_t end
)
1455 zfsvfs_t
*zfsvfs
= zp
->z_zfsvfs
;
1462 * We will change zp_size, lock the whole file.
1464 rl
= zfs_range_lock(zp
, 0, UINT64_MAX
, RL_WRITER
);
1467 * Nothing to do if file already at desired length.
1469 if (end
<= zp
->z_size
) {
1470 zfs_range_unlock(rl
);
1474 tx
= dmu_tx_create(zfsvfs
->z_os
);
1475 dmu_tx_hold_sa(tx
, zp
->z_sa_hdl
, B_FALSE
);
1476 zfs_sa_upgrade_txholds(tx
, zp
);
1477 if (end
> zp
->z_blksz
&&
1478 (!ISP2(zp
->z_blksz
) || zp
->z_blksz
< zfsvfs
->z_max_blksz
)) {
1480 * We are growing the file past the current block size.
1482 if (zp
->z_blksz
> zp
->z_zfsvfs
->z_max_blksz
) {
1483 ASSERT(!ISP2(zp
->z_blksz
));
1484 newblksz
= MIN(end
, SPA_MAXBLOCKSIZE
);
1486 newblksz
= MIN(end
, zp
->z_zfsvfs
->z_max_blksz
);
1488 dmu_tx_hold_write(tx
, zp
->z_id
, 0, newblksz
);
1493 error
= dmu_tx_assign(tx
, TXG_NOWAIT
);
1495 if (error
== ERESTART
) {
1501 zfs_range_unlock(rl
);
1506 zfs_grow_blocksize(zp
, newblksz
, tx
);
1510 VERIFY(0 == sa_update(zp
->z_sa_hdl
, SA_ZPL_SIZE(zp
->z_zfsvfs
),
1511 &zp
->z_size
, sizeof (zp
->z_size
), tx
));
1513 zfs_range_unlock(rl
);
1521 * Free space in a file.
1523 * IN: zp - znode of file to free data in.
1524 * off - start of section to free.
1525 * len - length of section to free.
1527 * RETURN: 0 if success
1528 * error code if failure
1531 zfs_free_range(znode_t
*zp
, uint64_t off
, uint64_t len
)
1533 zfsvfs_t
*zfsvfs
= zp
->z_zfsvfs
;
1538 * Lock the range being freed.
1540 rl
= zfs_range_lock(zp
, off
, len
, RL_WRITER
);
1543 * Nothing to do if file already at desired length.
1545 if (off
>= zp
->z_size
) {
1546 zfs_range_unlock(rl
);
1550 if (off
+ len
> zp
->z_size
)
1551 len
= zp
->z_size
- off
;
1553 error
= dmu_free_long_range(zfsvfs
->z_os
, zp
->z_id
, off
, len
);
1555 zfs_range_unlock(rl
);
1563 * IN: zp - znode of file to free data in.
1564 * end - new end-of-file.
1566 * RETURN: 0 if success
1567 * error code if failure
1570 zfs_trunc(znode_t
*zp
, uint64_t end
)
1572 zfsvfs_t
*zfsvfs
= zp
->z_zfsvfs
;
1573 vnode_t
*vp
= ZTOV(zp
);
1577 sa_bulk_attr_t bulk
[2];
1581 * We will change zp_size, lock the whole file.
1583 rl
= zfs_range_lock(zp
, 0, UINT64_MAX
, RL_WRITER
);
1586 * Nothing to do if file already at desired length.
1588 if (end
>= zp
->z_size
) {
1589 zfs_range_unlock(rl
);
1593 error
= dmu_free_long_range(zfsvfs
->z_os
, zp
->z_id
, end
, -1);
1595 zfs_range_unlock(rl
);
1599 tx
= dmu_tx_create(zfsvfs
->z_os
);
1600 dmu_tx_hold_sa(tx
, zp
->z_sa_hdl
, B_FALSE
);
1601 zfs_sa_upgrade_txholds(tx
, zp
);
1602 error
= dmu_tx_assign(tx
, TXG_NOWAIT
);
1604 if (error
== ERESTART
) {
1610 zfs_range_unlock(rl
);
1615 SA_ADD_BULK_ATTR(bulk
, count
, SA_ZPL_SIZE(zfsvfs
),
1616 NULL
, &zp
->z_size
, sizeof (zp
->z_size
));
1619 zp
->z_pflags
&= ~ZFS_SPARSE
;
1620 SA_ADD_BULK_ATTR(bulk
, count
, SA_ZPL_FLAGS(zfsvfs
),
1621 NULL
, &zp
->z_pflags
, 8);
1623 VERIFY(sa_bulk_update(zp
->z_sa_hdl
, bulk
, count
, tx
) == 0);
1628 * Clear any mapped pages in the truncated region. This has to
1629 * happen outside of the transaction to avoid the possibility of
1630 * a deadlock with someone trying to push a page that we are
1631 * about to invalidate.
1633 if (vn_has_cached_data(vp
)) {
1635 uint64_t start
= end
& PAGEMASK
;
1636 int poff
= end
& PAGEOFFSET
;
1638 if (poff
!= 0 && (pp
= page_lookup(vp
, start
, SE_SHARED
))) {
1640 * We need to zero a partial page.
1642 pagezero(pp
, poff
, PAGESIZE
- poff
);
1646 error
= pvn_vplist_dirty(vp
, start
, zfs_no_putpage
,
1647 B_INVAL
| B_TRUNC
, NULL
);
1651 zfs_range_unlock(rl
);
1657 * Free space in a file
1659 * IN: zp - znode of file to free data in.
1660 * off - start of range
1661 * len - end of range (0 => EOF)
1662 * flag - current file open mode flags.
1663 * log - TRUE if this action should be logged
1665 * RETURN: 0 if success
1666 * error code if failure
1669 zfs_freesp(znode_t
*zp
, uint64_t off
, uint64_t len
, int flag
, boolean_t log
)
1671 vnode_t
*vp
= ZTOV(zp
);
1673 zfsvfs_t
*zfsvfs
= zp
->z_zfsvfs
;
1674 zilog_t
*zilog
= zfsvfs
->z_log
;
1676 uint64_t mtime
[2], ctime
[2];
1677 sa_bulk_attr_t bulk
[3];
1681 if ((error
= sa_lookup(zp
->z_sa_hdl
, SA_ZPL_MODE(zfsvfs
), &mode
,
1682 sizeof (mode
))) != 0)
1685 if (off
> zp
->z_size
) {
1686 error
= zfs_extend(zp
, off
+len
);
1687 if (error
== 0 && log
)
1694 * Check for any locks in the region to be freed.
1697 if (MANDLOCK(vp
, (mode_t
)mode
)) {
1698 uint64_t length
= (len
? len
: zp
->z_size
- off
);
1699 if (error
= chklock(vp
, FWRITE
, off
, length
, flag
, NULL
))
1704 error
= zfs_trunc(zp
, off
);
1706 if ((error
= zfs_free_range(zp
, off
, len
)) == 0 &&
1707 off
+ len
> zp
->z_size
)
1708 error
= zfs_extend(zp
, off
+len
);
1713 tx
= dmu_tx_create(zfsvfs
->z_os
);
1714 dmu_tx_hold_sa(tx
, zp
->z_sa_hdl
, B_FALSE
);
1715 zfs_sa_upgrade_txholds(tx
, zp
);
1716 error
= dmu_tx_assign(tx
, TXG_NOWAIT
);
1718 if (error
== ERESTART
) {
1727 SA_ADD_BULK_ATTR(bulk
, count
, SA_ZPL_MTIME(zfsvfs
), NULL
, mtime
, 16);
1728 SA_ADD_BULK_ATTR(bulk
, count
, SA_ZPL_CTIME(zfsvfs
), NULL
, ctime
, 16);
1729 SA_ADD_BULK_ATTR(bulk
, count
, SA_ZPL_FLAGS(zfsvfs
),
1730 NULL
, &zp
->z_pflags
, 8);
1731 zfs_tstamp_update_setup(zp
, CONTENT_MODIFIED
, mtime
, ctime
, B_TRUE
);
1732 error
= sa_bulk_update(zp
->z_sa_hdl
, bulk
, count
, tx
);
1735 zfs_log_truncate(zilog
, tx
, TX_TRUNCATE
, zp
, off
, len
);
1742 zfs_create_fs(objset_t
*os
, cred_t
*cr
, nvlist_t
*zplprops
, dmu_tx_t
*tx
)
1745 uint64_t moid
, obj
, sa_obj
, version
;
1746 uint64_t sense
= ZFS_CASE_SENSITIVE
;
1751 znode_t
*rootzp
= NULL
;
1755 zfs_acl_ids_t acl_ids
;
1758 * First attempt to create master node.
1761 * In an empty objset, there are no blocks to read and thus
1762 * there can be no i/o errors (which we assert below).
1764 moid
= MASTER_NODE_OBJ
;
1765 error
= zap_create_claim(os
, moid
, DMU_OT_MASTER_NODE
,
1766 DMU_OT_NONE
, 0, tx
);
1770 * Set starting attributes.
1772 version
= zfs_zpl_version_map(spa_version(dmu_objset_spa(os
)));
1774 while ((elem
= nvlist_next_nvpair(zplprops
, elem
)) != NULL
) {
1775 /* For the moment we expect all zpl props to be uint64_ts */
1779 ASSERT(nvpair_type(elem
) == DATA_TYPE_UINT64
);
1780 VERIFY(nvpair_value_uint64(elem
, &val
) == 0);
1781 name
= nvpair_name(elem
);
1782 if (strcmp(name
, zfs_prop_to_name(ZFS_PROP_VERSION
)) == 0) {
1786 error
= zap_update(os
, moid
, name
, 8, 1, &val
, tx
);
1789 if (strcmp(name
, zfs_prop_to_name(ZFS_PROP_NORMALIZE
)) == 0)
1791 else if (strcmp(name
, zfs_prop_to_name(ZFS_PROP_CASE
)) == 0)
1794 ASSERT(version
!= 0);
1795 error
= zap_update(os
, moid
, ZPL_VERSION_STR
, 8, 1, &version
, tx
);
1798 * Create zap object used for SA attribute registration
1801 if (version
>= ZPL_VERSION_SA
) {
1802 sa_obj
= zap_create(os
, DMU_OT_SA_MASTER_NODE
,
1803 DMU_OT_NONE
, 0, tx
);
1804 error
= zap_add(os
, moid
, ZFS_SA_ATTRS
, 8, 1, &sa_obj
, tx
);
1810 * Create a delete queue.
1812 obj
= zap_create(os
, DMU_OT_UNLINKED_SET
, DMU_OT_NONE
, 0, tx
);
1814 error
= zap_add(os
, moid
, ZFS_UNLINKED_SET
, 8, 1, &obj
, tx
);
1818 * Create root znode. Create minimal znode/vnode/zfsvfs
1819 * to allow zfs_mknode to work.
1821 vattr
.va_mask
= AT_MODE
|AT_UID
|AT_GID
|AT_TYPE
;
1822 vattr
.va_type
= VDIR
;
1823 vattr
.va_mode
= S_IFDIR
|0755;
1824 vattr
.va_uid
= crgetuid(cr
);
1825 vattr
.va_gid
= crgetgid(cr
);
1827 rootzp
= kmem_cache_alloc(znode_cache
, KM_SLEEP
);
1828 ASSERT(!POINTER_IS_VALID(rootzp
->z_zfsvfs
));
1829 rootzp
->z_moved
= 0;
1830 rootzp
->z_unlinked
= 0;
1831 rootzp
->z_atime_dirty
= 0;
1832 rootzp
->z_is_sa
= USE_SA(version
, os
);
1838 bzero(&zfsvfs
, sizeof (zfsvfs_t
));
1841 zfsvfs
.z_parent
= &zfsvfs
;
1842 zfsvfs
.z_version
= version
;
1843 zfsvfs
.z_use_fuids
= USE_FUIDS(version
, os
);
1844 zfsvfs
.z_use_sa
= USE_SA(version
, os
);
1845 zfsvfs
.z_norm
= norm
;
1847 error
= sa_setup(os
, sa_obj
, zfs_attr_table
, ZPL_END
,
1848 &zfsvfs
.z_attr_table
);
1853 * Fold case on file systems that are always or sometimes case
1856 if (sense
== ZFS_CASE_INSENSITIVE
|| sense
== ZFS_CASE_MIXED
)
1857 zfsvfs
.z_norm
|= U8_TEXTPREP_TOUPPER
;
1859 mutex_init(&zfsvfs
.z_znodes_lock
, NULL
, MUTEX_DEFAULT
, NULL
);
1860 list_create(&zfsvfs
.z_all_znodes
, sizeof (znode_t
),
1861 offsetof(znode_t
, z_link_node
));
1863 for (i
= 0; i
!= ZFS_OBJ_MTX_SZ
; i
++)
1864 mutex_init(&zfsvfs
.z_hold_mtx
[i
], NULL
, MUTEX_DEFAULT
, NULL
);
1866 rootzp
->z_zfsvfs
= &zfsvfs
;
1867 VERIFY(0 == zfs_acl_ids_create(rootzp
, IS_ROOT_NODE
, &vattr
,
1868 cr
, NULL
, &acl_ids
));
1869 zfs_mknode(rootzp
, &vattr
, tx
, cr
, IS_ROOT_NODE
, &zp
, &acl_ids
);
1870 ASSERT3P(zp
, ==, rootzp
);
1871 ASSERT(!vn_in_dnlc(ZTOV(rootzp
))); /* not valid to move */
1872 error
= zap_add(os
, moid
, ZFS_ROOT_OBJ
, 8, 1, &rootzp
->z_id
, tx
);
1874 zfs_acl_ids_free(&acl_ids
);
1875 POINTER_INVALIDATE(&rootzp
->z_zfsvfs
);
1877 ZTOV(rootzp
)->v_count
= 0;
1878 sa_handle_destroy(rootzp
->z_sa_hdl
);
1879 kmem_cache_free(znode_cache
, rootzp
);
1882 * Create shares directory
1885 error
= zfs_create_share_dir(&zfsvfs
, tx
);
1889 for (i
= 0; i
!= ZFS_OBJ_MTX_SZ
; i
++)
1890 mutex_destroy(&zfsvfs
.z_hold_mtx
[i
]);
1893 #endif /* _KERNEL */
1896 zfs_sa_setup(objset_t
*osp
, sa_attr_type_t
**sa_table
)
1898 uint64_t sa_obj
= 0;
1901 error
= zap_lookup(osp
, MASTER_NODE_OBJ
, ZFS_SA_ATTRS
, 8, 1, &sa_obj
);
1902 if (error
!= 0 && error
!= ENOENT
)
1905 error
= sa_setup(osp
, sa_obj
, zfs_attr_table
, ZPL_END
, sa_table
);
1910 zfs_grab_sa_handle(objset_t
*osp
, uint64_t obj
, sa_handle_t
**hdlp
,
1913 dmu_object_info_t doi
;
1916 if ((error
= sa_buf_hold(osp
, obj
, FTAG
, db
)) != 0)
1919 dmu_object_info_from_db(*db
, &doi
);
1920 if ((doi
.doi_bonus_type
!= DMU_OT_SA
&&
1921 doi
.doi_bonus_type
!= DMU_OT_ZNODE
) ||
1922 doi
.doi_bonus_type
== DMU_OT_ZNODE
&&
1923 doi
.doi_bonus_size
< sizeof (znode_phys_t
)) {
1924 sa_buf_rele(*db
, FTAG
);
1928 error
= sa_handle_get(osp
, obj
, NULL
, SA_HDL_PRIVATE
, hdlp
);
1930 sa_buf_rele(*db
, FTAG
);
1938 zfs_release_sa_handle(sa_handle_t
*hdl
, dmu_buf_t
*db
)
1940 sa_handle_destroy(hdl
);
1941 sa_buf_rele(db
, FTAG
);
1945 * Given an object number, return its parent object number and whether
1946 * or not the object is an extended attribute directory.
1949 zfs_obj_to_pobj(sa_handle_t
*hdl
, sa_attr_type_t
*sa_table
, uint64_t *pobjp
,
1955 sa_bulk_attr_t bulk
[3];
1959 SA_ADD_BULK_ATTR(bulk
, count
, sa_table
[ZPL_PARENT
], NULL
,
1960 &parent
, sizeof (parent
));
1961 SA_ADD_BULK_ATTR(bulk
, count
, sa_table
[ZPL_FLAGS
], NULL
,
1962 &pflags
, sizeof (pflags
));
1963 SA_ADD_BULK_ATTR(bulk
, count
, sa_table
[ZPL_MODE
], NULL
,
1964 &mode
, sizeof (mode
));
1966 if ((error
= sa_bulk_lookup(hdl
, bulk
, count
)) != 0)
1970 *is_xattrdir
= ((pflags
& ZFS_XATTR
) != 0) && S_ISDIR(mode
);
1976 * Given an object number, return some zpl level statistics
1979 zfs_obj_to_stats_impl(sa_handle_t
*hdl
, sa_attr_type_t
*sa_table
,
1982 sa_bulk_attr_t bulk
[4];
1985 SA_ADD_BULK_ATTR(bulk
, count
, sa_table
[ZPL_MODE
], NULL
,
1986 &sb
->zs_mode
, sizeof (sb
->zs_mode
));
1987 SA_ADD_BULK_ATTR(bulk
, count
, sa_table
[ZPL_GEN
], NULL
,
1988 &sb
->zs_gen
, sizeof (sb
->zs_gen
));
1989 SA_ADD_BULK_ATTR(bulk
, count
, sa_table
[ZPL_LINKS
], NULL
,
1990 &sb
->zs_links
, sizeof (sb
->zs_links
));
1991 SA_ADD_BULK_ATTR(bulk
, count
, sa_table
[ZPL_CTIME
], NULL
,
1992 &sb
->zs_ctime
, sizeof (sb
->zs_ctime
));
1994 return (sa_bulk_lookup(hdl
, bulk
, count
));
1998 zfs_obj_to_path_impl(objset_t
*osp
, uint64_t obj
, sa_handle_t
*hdl
,
1999 sa_attr_type_t
*sa_table
, char *buf
, int len
)
2001 sa_handle_t
*sa_hdl
;
2002 sa_handle_t
*prevhdl
= NULL
;
2003 dmu_buf_t
*prevdb
= NULL
;
2004 dmu_buf_t
*sa_db
= NULL
;
2005 char *path
= buf
+ len
- 1;
2013 char component
[MAXNAMELEN
+ 2];
2018 zfs_release_sa_handle(prevhdl
, prevdb
);
2020 if ((error
= zfs_obj_to_pobj(sa_hdl
, sa_table
, &pobj
,
2021 &is_xattrdir
)) != 0)
2032 (void) sprintf(component
+ 1, "<xattrdir>");
2034 error
= zap_value_search(osp
, pobj
, obj
,
2035 ZFS_DIRENT_OBJ(-1ULL), component
+ 1);
2040 complen
= strlen(component
);
2042 ASSERT(path
>= buf
);
2043 bcopy(component
, path
, complen
);
2046 if (sa_hdl
!= hdl
) {
2050 error
= zfs_grab_sa_handle(osp
, obj
, &sa_hdl
, &sa_db
);
2058 if (sa_hdl
!= NULL
&& sa_hdl
!= hdl
) {
2059 ASSERT(sa_db
!= NULL
);
2060 zfs_release_sa_handle(sa_hdl
, sa_db
);
2064 (void) memmove(buf
, path
, buf
+ len
- path
);
2070 zfs_obj_to_path(objset_t
*osp
, uint64_t obj
, char *buf
, int len
)
2072 sa_attr_type_t
*sa_table
;
2077 error
= zfs_sa_setup(osp
, &sa_table
);
2081 error
= zfs_grab_sa_handle(osp
, obj
, &hdl
, &db
);
2085 error
= zfs_obj_to_path_impl(osp
, obj
, hdl
, sa_table
, buf
, len
);
2087 zfs_release_sa_handle(hdl
, db
);
2092 zfs_obj_to_stats(objset_t
*osp
, uint64_t obj
, zfs_stat_t
*sb
,
2095 char *path
= buf
+ len
- 1;
2096 sa_attr_type_t
*sa_table
;
2103 error
= zfs_sa_setup(osp
, &sa_table
);
2107 error
= zfs_grab_sa_handle(osp
, obj
, &hdl
, &db
);
2111 error
= zfs_obj_to_stats_impl(hdl
, sa_table
, sb
);
2113 zfs_release_sa_handle(hdl
, db
);
2117 error
= zfs_obj_to_path_impl(osp
, obj
, hdl
, sa_table
, buf
, len
);
2119 zfs_release_sa_handle(hdl
, db
);