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 2008 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/u8_textprep.h>
37 #include <sys/dsl_dataset.h>
39 #include <sys/vnode.h>
42 #include <sys/errno.h>
43 #include <sys/unistd.h>
44 #include <sys/atomic.h>
45 #include <sys/zfs_dir.h>
46 #include <sys/zfs_acl.h>
47 #include <sys/zfs_ioctl.h>
48 #include <sys/zfs_rlock.h>
49 #include <sys/zfs_fuid.h>
50 #include <sys/fs/zfs.h>
51 #include <sys/kidmap.h>
55 #include <sys/refcount.h>
58 #include <sys/zfs_znode.h>
59 #include <sys/refcount.h>
63 /* Used by fstat(1). */
64 SYSCTL_INT(_debug_sizeof, OID_AUTO, znode, CTLFLAG_RD, 0, sizeof(znode_t),
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)
96 #if 1 /* XXXPJD: From OpenSolaris. */
98 * We should never drop all dbuf refs without first clearing
99 * the eviction callback.
101 panic("evicting znode %p\n", user_ptr);
103 znode_t *zp = user_ptr;
106 mutex_enter(&zp->z_lock);
110 mutex_exit(&zp->z_lock);
112 } else if (vp->v_count == 0) {
115 mutex_exit(&zp->z_lock);
116 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, curthread);
117 vrecycle(vp, curthread);
122 mutex_exit(&zp->z_lock);
127 extern struct vop_vector zfs_vnodeops;
128 extern struct vop_vector zfs_fifoops;
131 * XXX: We cannot use this function as a cache constructor, because
132 * there is one global cache for all file systems and we need
133 * to pass vfsp here, which is not possible, because argument
134 * 'cdrarg' is defined at kmem_cache_create() time.
137 zfs_znode_cache_constructor(void *buf, void *arg, int kmflags)
144 POINTER_INVALIDATE(&zp->z_zfsvfs);
145 ASSERT(!POINTER_IS_VALID(zp->z_zfsvfs));
148 error = getnewvnode("zfs", vfsp, &zfs_vnodeops, &vp);
149 if (error != 0 && (kmflags & KM_NOSLEEP))
152 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
154 vp->v_data = (caddr_t)zp;
160 list_link_init(&zp->z_link_node);
162 mutex_init(&zp->z_lock, NULL, MUTEX_DEFAULT, NULL);
163 rw_init(&zp->z_map_lock, NULL, RW_DEFAULT, NULL);
164 rw_init(&zp->z_parent_lock, NULL, RW_DEFAULT, NULL);
165 rw_init(&zp->z_name_lock, NULL, RW_DEFAULT, NULL);
166 mutex_init(&zp->z_acl_lock, NULL, MUTEX_DEFAULT, NULL);
168 mutex_init(&zp->z_range_lock, NULL, MUTEX_DEFAULT, NULL);
169 avl_create(&zp->z_range_avl, zfs_range_compare,
170 sizeof (rl_t), offsetof(rl_t, r_node));
173 zp->z_dirlocks = NULL;
179 zfs_znode_cache_destructor(void *buf, void *arg)
183 ASSERT(!POINTER_IS_VALID(zp->z_zfsvfs));
184 ASSERT(ZTOV(zp) == NULL);
186 ASSERT(!list_link_active(&zp->z_link_node));
187 mutex_destroy(&zp->z_lock);
188 rw_destroy(&zp->z_map_lock);
189 rw_destroy(&zp->z_parent_lock);
190 rw_destroy(&zp->z_name_lock);
191 mutex_destroy(&zp->z_acl_lock);
192 avl_destroy(&zp->z_range_avl);
193 mutex_destroy(&zp->z_range_lock);
195 ASSERT(zp->z_dbuf == NULL);
196 ASSERT(zp->z_dirlocks == NULL);
201 uint64_t zms_zfsvfs_invalid;
202 uint64_t zms_zfsvfs_unmounted;
203 uint64_t zms_zfsvfs_recheck_invalid;
204 uint64_t zms_obj_held;
205 uint64_t zms_vnode_locked;
206 uint64_t zms_not_only_dnlc;
208 #endif /* ZNODE_STATS */
212 zfs_znode_move_impl(znode_t *ozp, znode_t *nzp)
217 nzp->z_zfsvfs = ozp->z_zfsvfs;
221 nzp->z_vnode = ozp->z_vnode;
222 ozp->z_vnode = vp; /* let destructor free the overwritten vnode */
223 ZTOV(ozp)->v_data = ozp;
224 ZTOV(nzp)->v_data = nzp;
226 nzp->z_id = ozp->z_id;
227 ASSERT(ozp->z_dirlocks == NULL); /* znode not in use */
228 ASSERT(avl_numnodes(&ozp->z_range_avl) == 0);
229 nzp->z_unlinked = ozp->z_unlinked;
230 nzp->z_atime_dirty = ozp->z_atime_dirty;
231 nzp->z_zn_prefetch = ozp->z_zn_prefetch;
232 nzp->z_blksz = ozp->z_blksz;
233 nzp->z_seq = ozp->z_seq;
234 nzp->z_mapcnt = ozp->z_mapcnt;
235 nzp->z_last_itx = ozp->z_last_itx;
236 nzp->z_gen = ozp->z_gen;
237 nzp->z_sync_cnt = ozp->z_sync_cnt;
238 nzp->z_phys = ozp->z_phys;
239 nzp->z_dbuf = ozp->z_dbuf;
241 /* Update back pointers. */
242 (void) dmu_buf_update_user(nzp->z_dbuf, ozp, nzp, &nzp->z_phys,
246 * Invalidate the original znode by clearing fields that provide a
247 * pointer back to the znode. Set the low bit of the vfs pointer to
248 * ensure that zfs_znode_move() recognizes the znode as invalid in any
249 * subsequent callback.
252 POINTER_INVALIDATE(&ozp->z_zfsvfs);
256 * Wrapper function for ZFS_ENTER that returns 0 if successful and otherwise
257 * returns a non-zero error code.
260 zfs_enter(zfsvfs_t *zfsvfs)
268 zfs_znode_move(void *buf, void *newbuf, size_t size, void *arg)
270 znode_t *ozp = buf, *nzp = newbuf;
275 * The znode is on the file system's list of known znodes if the vfs
276 * pointer is valid. We set the low bit of the vfs pointer when freeing
277 * the znode to invalidate it, and the memory patterns written by kmem
278 * (baddcafe and deadbeef) set at least one of the two low bits. A newly
279 * created znode sets the vfs pointer last of all to indicate that the
280 * znode is known and in a valid state to be moved by this function.
282 zfsvfs = ozp->z_zfsvfs;
283 if (!POINTER_IS_VALID(zfsvfs)) {
284 ZNODE_STAT_ADD(znode_move_stats.zms_zfsvfs_invalid);
285 return (KMEM_CBRC_DONT_KNOW);
289 * Ensure that the filesystem is not unmounted during the move.
291 if (zfs_enter(zfsvfs) != 0) { /* ZFS_ENTER */
292 ZNODE_STAT_ADD(znode_move_stats.zms_zfsvfs_unmounted);
293 return (KMEM_CBRC_DONT_KNOW);
296 mutex_enter(&zfsvfs->z_znodes_lock);
298 * Recheck the vfs pointer in case the znode was removed just before
299 * acquiring the lock.
301 if (zfsvfs != ozp->z_zfsvfs) {
302 mutex_exit(&zfsvfs->z_znodes_lock);
304 ZNODE_STAT_ADD(znode_move_stats.zms_zfsvfs_recheck_invalid);
305 return (KMEM_CBRC_DONT_KNOW);
309 * At this point we know that as long as we hold z_znodes_lock, the
310 * znode cannot be freed and fields within the znode can be safely
311 * accessed. Now, prevent a race with zfs_zget().
313 if (ZFS_OBJ_HOLD_TRYENTER(zfsvfs, ozp->z_id) == 0) {
314 mutex_exit(&zfsvfs->z_znodes_lock);
316 ZNODE_STAT_ADD(znode_move_stats.zms_obj_held);
317 return (KMEM_CBRC_LATER);
321 if (mutex_tryenter(&vp->v_lock) == 0) {
322 ZFS_OBJ_HOLD_EXIT(zfsvfs, ozp->z_id);
323 mutex_exit(&zfsvfs->z_znodes_lock);
325 ZNODE_STAT_ADD(znode_move_stats.zms_vnode_locked);
326 return (KMEM_CBRC_LATER);
329 /* Only move znodes that are referenced _only_ by the DNLC. */
330 if (vp->v_count != 1 || !vn_in_dnlc(vp)) {
331 mutex_exit(&vp->v_lock);
332 ZFS_OBJ_HOLD_EXIT(zfsvfs, ozp->z_id);
333 mutex_exit(&zfsvfs->z_znodes_lock);
335 ZNODE_STAT_ADD(znode_move_stats.zms_not_only_dnlc);
336 return (KMEM_CBRC_LATER);
340 * The znode is known and in a valid state to move. We're holding the
341 * locks needed to execute the critical section.
343 zfs_znode_move_impl(ozp, nzp);
344 mutex_exit(&vp->v_lock);
345 ZFS_OBJ_HOLD_EXIT(zfsvfs, ozp->z_id);
347 list_link_replace(&ozp->z_link_node, &nzp->z_link_node);
348 mutex_exit(&zfsvfs->z_znodes_lock);
351 return (KMEM_CBRC_YES);
361 ASSERT(znode_cache == NULL);
362 znode_cache = kmem_cache_create("zfs_znode_cache",
363 sizeof (znode_t), 0, /* zfs_znode_cache_constructor */ NULL,
364 zfs_znode_cache_destructor, NULL, NULL, NULL, 0);
366 kmem_cache_set_move(znode_cache, zfs_znode_move);
377 kmem_cache_destroy(znode_cache);
382 * zfs_init_fs - Initialize the zfsvfs struct and the file system
383 * incore "master" object. Verify version compatibility.
386 zfs_init_fs(zfsvfs_t *zfsvfs, znode_t **zpp)
388 objset_t *os = zfsvfs->z_os;
395 error = zfs_get_zplprop(os, ZFS_PROP_VERSION, &zfsvfs->z_version);
398 } else if (zfsvfs->z_version > ZPL_VERSION) {
399 (void) printf("Mismatched versions: File system "
400 "is version %llu on-disk format, which is "
401 "incompatible with this software version %lld!",
402 (u_longlong_t)zfsvfs->z_version, ZPL_VERSION);
406 if ((error = zfs_get_zplprop(os, ZFS_PROP_NORMALIZE, &zval)) != 0)
408 zfsvfs->z_norm = (int)zval;
409 if ((error = zfs_get_zplprop(os, ZFS_PROP_UTF8ONLY, &zval)) != 0)
411 zfsvfs->z_utf8 = (zval != 0);
412 if ((error = zfs_get_zplprop(os, ZFS_PROP_CASE, &zval)) != 0)
414 zfsvfs->z_case = (uint_t)zval;
416 * Fold case on file systems that are always or sometimes case
419 if (zfsvfs->z_case == ZFS_CASE_INSENSITIVE ||
420 zfsvfs->z_case == ZFS_CASE_MIXED)
421 zfsvfs->z_norm |= U8_TEXTPREP_TOUPPER;
424 * The fsid is 64 bits, composed of an 8-bit fs type, which
425 * separates our fsid from any other filesystem types, and a
426 * 56-bit objset unique ID. The objset unique ID is unique to
427 * all objsets open on this system, provided by unique_create().
428 * The 8-bit fs type must be put in the low bits of fsid[1]
429 * because that's where other Solaris filesystems put it.
431 fsid_guid = dmu_objset_fsid_guid(os);
432 ASSERT((fsid_guid & ~((1ULL<<56)-1)) == 0);
433 zfsvfs->z_vfs->vfs_fsid.val[0] = fsid_guid;
434 zfsvfs->z_vfs->vfs_fsid.val[1] = ((fsid_guid>>32) << 8) |
435 zfsvfs->z_vfs->mnt_vfc->vfc_typenum & 0xFF;
437 error = zap_lookup(os, MASTER_NODE_OBJ, ZFS_ROOT_OBJ, 8, 1,
441 ASSERT(zfsvfs->z_root != 0);
443 error = zap_lookup(os, MASTER_NODE_OBJ, ZFS_UNLINKED_SET, 8, 1,
444 &zfsvfs->z_unlinkedobj);
449 * Initialize zget mutex's
451 for (i = 0; i != ZFS_OBJ_MTX_SZ; i++)
452 mutex_init(&zfsvfs->z_hold_mtx[i], NULL, MUTEX_DEFAULT, NULL);
454 error = zfs_zget(zfsvfs, zfsvfs->z_root, zpp);
457 * On error, we destroy the mutexes here since it's not
458 * possible for the caller to determine if the mutexes were
459 * initialized properly.
461 for (i = 0; i != ZFS_OBJ_MTX_SZ; i++)
462 mutex_destroy(&zfsvfs->z_hold_mtx[i]);
465 ASSERT3U((*zpp)->z_id, ==, zfsvfs->z_root);
466 error = zap_lookup(os, MASTER_NODE_OBJ, ZFS_FUID_TABLES, 8, 1,
467 &zfsvfs->z_fuid_obj);
475 * define a couple of values we need available
476 * for both 64 and 32 bit environments.
479 #define NBITSMINOR64 32
482 #define MAXMAJ64 0xffffffffUL
485 #define MAXMIN64 0xffffffffUL
489 * Create special expldev for ZFS private use.
490 * Can't use standard expldev since it doesn't do
491 * what we want. The standard expldev() takes a
492 * dev32_t in LP64 and expands it to a long dev_t.
493 * We need an interface that takes a dev32_t in ILP32
494 * and expands it to a long dev_t.
497 zfs_expldev(dev_t dev)
499 return (((uint64_t)major(dev) << NBITSMINOR64) | minor(dev));
502 * Special cmpldev for ZFS private use.
503 * Can't use standard cmpldev since it takes
504 * a long dev_t and compresses it to dev32_t in
505 * LP64. We need to do a compaction of a long dev_t
506 * to a dev32_t in ILP32.
509 zfs_cmpldev(uint64_t dev)
511 return (makedev((dev >> NBITSMINOR64), (dev & MAXMIN64)));
515 zfs_znode_dmu_init(zfsvfs_t *zfsvfs, znode_t *zp, dmu_buf_t *db)
519 ASSERT(!POINTER_IS_VALID(zp->z_zfsvfs) || (zfsvfs == zp->z_zfsvfs));
520 ASSERT(MUTEX_HELD(ZFS_OBJ_MUTEX(zfsvfs, zp->z_id)));
522 mutex_enter(&zp->z_lock);
524 ASSERT(zp->z_dbuf == NULL);
526 nzp = dmu_buf_set_user_ie(db, zp, &zp->z_phys, znode_evict_error);
530 * concurrent zgets on this object.
533 panic("existing znode %p for dbuf %p", (void *)nzp, (void *)db);
536 * Slap on VROOT if we are the root znode
538 if (zp->z_id == zfsvfs->z_root)
539 ZTOV(zp)->v_flag |= VROOT;
541 mutex_exit(&zp->z_lock);
546 zfs_znode_dmu_fini(znode_t *zp)
548 dmu_buf_t *db = zp->z_dbuf;
549 ASSERT(MUTEX_HELD(ZFS_OBJ_MUTEX(zp->z_zfsvfs, zp->z_id)) ||
551 RW_WRITE_HELD(&zp->z_zfsvfs->z_teardown_inactive_lock));
552 ASSERT(zp->z_dbuf != NULL);
554 VERIFY(zp == dmu_buf_update_user(db, zp, NULL, NULL, NULL));
555 dmu_buf_rele(db, NULL);
559 * Construct a new znode/vnode and intialize.
561 * This does not do a call to dmu_set_user() that is
562 * up to the caller to do, in case you don't want to
566 zfs_znode_alloc(zfsvfs_t *zfsvfs, dmu_buf_t *db, int blksz)
571 zp = kmem_cache_alloc(znode_cache, KM_SLEEP);
572 zfs_znode_cache_constructor(zp, zfsvfs->z_parent->z_vfs, 0);
574 ASSERT(zp->z_dirlocks == NULL);
575 ASSERT(zp->z_dbuf == NULL);
576 ASSERT(!POINTER_IS_VALID(zp->z_zfsvfs));
579 * Defer setting z_zfsvfs until the znode is ready to be a candidate for
580 * the zfs_znode_move() callback.
584 zp->z_atime_dirty = 0;
587 zp->z_id = db->db_object;
589 zp->z_seq = 0x7A4653;
597 zfs_znode_dmu_init(zfsvfs, zp, db);
599 zp->z_gen = zp->z_phys->zp_gen;
606 vp->v_type = IFTOVT((mode_t)zp->z_phys->zp_mode);
607 switch (vp->v_type) {
609 zp->z_zn_prefetch = B_TRUE; /* z_prefetch default is enabled */
612 vp->v_op = &zfs_fifoops;
615 if (vp->v_type != VFIFO)
618 mutex_enter(&zfsvfs->z_znodes_lock);
619 list_insert_tail(&zfsvfs->z_all_znodes, zp);
622 * Everything else must be valid before assigning z_zfsvfs makes the
623 * znode eligible for zfs_znode_move().
625 zp->z_zfsvfs = zfsvfs;
626 mutex_exit(&zfsvfs->z_znodes_lock);
628 VFS_HOLD(zfsvfs->z_vfs);
633 * Create a new DMU object to hold a zfs znode.
635 * IN: dzp - parent directory for new znode
636 * vap - file attributes for new znode
637 * tx - dmu transaction id for zap operations
638 * cr - credentials of caller
640 * IS_ROOT_NODE - new object will be root
641 * IS_XATTR - new object is an attribute
642 * IS_REPLAY - intent log replay
643 * bonuslen - length of bonus buffer
644 * setaclp - File/Dir initial ACL
645 * fuidp - Tracks fuid allocation.
647 * OUT: zpp - allocated znode
651 zfs_mknode(znode_t *dzp, vattr_t *vap, dmu_tx_t *tx, cred_t *cr,
652 uint_t flag, znode_t **zpp, int bonuslen, zfs_acl_t *setaclp,
653 zfs_fuid_info_t **fuidp)
657 zfsvfs_t *zfsvfs = dzp->z_zfsvfs;
662 ASSERT(vap && (vap->va_mask & (AT_TYPE|AT_MODE)) == (AT_TYPE|AT_MODE));
664 if (zfsvfs->z_assign >= TXG_INITIAL) { /* ZIL replay */
665 obj = vap->va_nodeid;
667 now = vap->va_ctime; /* see zfs_replay_create() */
668 gen = vap->va_nblocks; /* ditto */
672 gen = dmu_tx_get_txg(tx);
676 * Create a new DMU object.
679 * There's currently no mechanism for pre-reading the blocks that will
680 * be to needed allocate a new object, so we accept the small chance
681 * that there will be an i/o error and we will fail one of the
684 if (vap->va_type == VDIR) {
685 if (flag & IS_REPLAY) {
686 err = zap_create_claim_norm(zfsvfs->z_os, obj,
687 zfsvfs->z_norm, DMU_OT_DIRECTORY_CONTENTS,
688 DMU_OT_ZNODE, sizeof (znode_phys_t) + bonuslen, tx);
689 ASSERT3U(err, ==, 0);
691 obj = zap_create_norm(zfsvfs->z_os,
692 zfsvfs->z_norm, DMU_OT_DIRECTORY_CONTENTS,
693 DMU_OT_ZNODE, sizeof (znode_phys_t) + bonuslen, tx);
696 if (flag & IS_REPLAY) {
697 err = dmu_object_claim(zfsvfs->z_os, obj,
698 DMU_OT_PLAIN_FILE_CONTENTS, 0,
699 DMU_OT_ZNODE, sizeof (znode_phys_t) + bonuslen, tx);
700 ASSERT3U(err, ==, 0);
702 obj = dmu_object_alloc(zfsvfs->z_os,
703 DMU_OT_PLAIN_FILE_CONTENTS, 0,
704 DMU_OT_ZNODE, sizeof (znode_phys_t) + bonuslen, tx);
707 VERIFY(0 == dmu_bonus_hold(zfsvfs->z_os, obj, NULL, &db));
708 dmu_buf_will_dirty(db, tx);
711 * Initialize the znode physical data to zero.
713 ASSERT(db->db_size >= sizeof (znode_phys_t));
714 bzero(db->db_data, db->db_size);
718 * If this is the root, fix up the half-initialized parent pointer
719 * to reference the just-allocated physical data area.
721 if (flag & IS_ROOT_NODE) {
728 * If parent is an xattr, so am I.
730 if (dzp->z_phys->zp_flags & ZFS_XATTR)
733 if (vap->va_type == VBLK || vap->va_type == VCHR) {
734 pzp->zp_rdev = zfs_expldev(vap->va_rdev);
737 if (zfsvfs->z_use_fuids)
738 pzp->zp_flags = ZFS_ARCHIVE | ZFS_AV_MODIFIED;
740 if (vap->va_type == VDIR) {
741 pzp->zp_size = 2; /* contents ("." and "..") */
742 pzp->zp_links = (flag & (IS_ROOT_NODE | IS_XATTR)) ? 2 : 1;
745 pzp->zp_parent = dzp->z_id;
747 pzp->zp_flags |= ZFS_XATTR;
751 ZFS_TIME_ENCODE(&now, pzp->zp_crtime);
752 ZFS_TIME_ENCODE(&now, pzp->zp_ctime);
754 if (vap->va_mask & AT_ATIME) {
755 ZFS_TIME_ENCODE(&vap->va_atime, pzp->zp_atime);
757 ZFS_TIME_ENCODE(&now, pzp->zp_atime);
760 if (vap->va_mask & AT_MTIME) {
761 ZFS_TIME_ENCODE(&vap->va_mtime, pzp->zp_mtime);
763 ZFS_TIME_ENCODE(&now, pzp->zp_mtime);
766 pzp->zp_mode = MAKEIMODE(vap->va_type, vap->va_mode);
767 if (!(flag & IS_ROOT_NODE)) {
768 ZFS_OBJ_HOLD_ENTER(zfsvfs, obj);
769 *zpp = zfs_znode_alloc(zfsvfs, db, 0);
770 ZFS_OBJ_HOLD_EXIT(zfsvfs, obj);
773 * If we are creating the root node, the "parent" we
774 * passed in is the znode for the root.
778 zfs_perm_init(*zpp, dzp, flag, vap, tx, cr, setaclp, fuidp);
779 if (!(flag & IS_ROOT_NODE)) {
783 vp->v_vflag |= VV_FORCEINSMQ;
784 err = insmntque(vp, zfsvfs->z_vfs);
785 vp->v_vflag &= ~VV_FORCEINSMQ;
786 KASSERT(err == 0, ("insmntque() failed: error %d", err));
791 zfs_xvattr_set(znode_t *zp, xvattr_t *xvap)
795 xoap = xva_getxoptattr(xvap);
798 if (XVA_ISSET_REQ(xvap, XAT_CREATETIME)) {
799 ZFS_TIME_ENCODE(&xoap->xoa_createtime, zp->z_phys->zp_crtime);
800 XVA_SET_RTN(xvap, XAT_CREATETIME);
802 if (XVA_ISSET_REQ(xvap, XAT_READONLY)) {
803 ZFS_ATTR_SET(zp, ZFS_READONLY, xoap->xoa_readonly);
804 XVA_SET_RTN(xvap, XAT_READONLY);
806 if (XVA_ISSET_REQ(xvap, XAT_HIDDEN)) {
807 ZFS_ATTR_SET(zp, ZFS_HIDDEN, xoap->xoa_hidden);
808 XVA_SET_RTN(xvap, XAT_HIDDEN);
810 if (XVA_ISSET_REQ(xvap, XAT_SYSTEM)) {
811 ZFS_ATTR_SET(zp, ZFS_SYSTEM, xoap->xoa_system);
812 XVA_SET_RTN(xvap, XAT_SYSTEM);
814 if (XVA_ISSET_REQ(xvap, XAT_ARCHIVE)) {
815 ZFS_ATTR_SET(zp, ZFS_ARCHIVE, xoap->xoa_archive);
816 XVA_SET_RTN(xvap, XAT_ARCHIVE);
818 if (XVA_ISSET_REQ(xvap, XAT_IMMUTABLE)) {
819 ZFS_ATTR_SET(zp, ZFS_IMMUTABLE, xoap->xoa_immutable);
820 XVA_SET_RTN(xvap, XAT_IMMUTABLE);
822 if (XVA_ISSET_REQ(xvap, XAT_NOUNLINK)) {
823 ZFS_ATTR_SET(zp, ZFS_NOUNLINK, xoap->xoa_nounlink);
824 XVA_SET_RTN(xvap, XAT_NOUNLINK);
826 if (XVA_ISSET_REQ(xvap, XAT_APPENDONLY)) {
827 ZFS_ATTR_SET(zp, ZFS_APPENDONLY, xoap->xoa_appendonly);
828 XVA_SET_RTN(xvap, XAT_APPENDONLY);
830 if (XVA_ISSET_REQ(xvap, XAT_NODUMP)) {
831 ZFS_ATTR_SET(zp, ZFS_NODUMP, xoap->xoa_nodump);
832 XVA_SET_RTN(xvap, XAT_NODUMP);
834 if (XVA_ISSET_REQ(xvap, XAT_OPAQUE)) {
835 ZFS_ATTR_SET(zp, ZFS_OPAQUE, xoap->xoa_opaque);
836 XVA_SET_RTN(xvap, XAT_OPAQUE);
838 if (XVA_ISSET_REQ(xvap, XAT_AV_QUARANTINED)) {
839 ZFS_ATTR_SET(zp, ZFS_AV_QUARANTINED,
840 xoap->xoa_av_quarantined);
841 XVA_SET_RTN(xvap, XAT_AV_QUARANTINED);
843 if (XVA_ISSET_REQ(xvap, XAT_AV_MODIFIED)) {
844 ZFS_ATTR_SET(zp, ZFS_AV_MODIFIED, xoap->xoa_av_modified);
845 XVA_SET_RTN(xvap, XAT_AV_MODIFIED);
847 if (XVA_ISSET_REQ(xvap, XAT_AV_SCANSTAMP)) {
848 (void) memcpy(zp->z_phys + 1, xoap->xoa_av_scanstamp,
849 sizeof (xoap->xoa_av_scanstamp));
850 zp->z_phys->zp_flags |= ZFS_BONUS_SCANSTAMP;
851 XVA_SET_RTN(xvap, XAT_AV_SCANSTAMP);
856 zfs_zget(zfsvfs_t *zfsvfs, uint64_t obj_num, znode_t **zpp)
858 dmu_object_info_t doi;
866 ZFS_OBJ_HOLD_ENTER(zfsvfs, obj_num);
868 err = dmu_bonus_hold(zfsvfs->z_os, obj_num, NULL, &db);
870 ZFS_OBJ_HOLD_EXIT(zfsvfs, obj_num);
874 dmu_object_info_from_db(db, &doi);
875 if (doi.doi_bonus_type != DMU_OT_ZNODE ||
876 doi.doi_bonus_size < sizeof (znode_phys_t)) {
877 dmu_buf_rele(db, NULL);
878 ZFS_OBJ_HOLD_EXIT(zfsvfs, obj_num);
882 zp = dmu_buf_get_user(db);
884 mutex_enter(&zp->z_lock);
887 * Since we do immediate eviction of the z_dbuf, we
888 * should never find a dbuf with a znode that doesn't
889 * know about the dbuf.
891 ASSERT3P(zp->z_dbuf, ==, db);
892 ASSERT3U(zp->z_id, ==, obj_num);
893 if (zp->z_unlinked) {
903 if ((vp->v_iflag & VI_DOOMED) != 0) {
906 * Don't VN_RELE() vnode here, because
907 * it can call vn_lock() which creates
908 * LOR between vnode lock and znode
909 * lock. We will VN_RELE() the vnode
910 * after droping znode lock.
916 ZFS_LOG(1, "dying znode detected (zp=%p)", zp);
920 * znode is dying so we can't reuse it, we must
921 * wait until destruction is completed.
923 dmu_buf_rele(db, NULL);
924 mutex_exit(&zp->z_lock);
925 ZFS_OBJ_HOLD_EXIT(zfsvfs, obj_num);
928 tsleep(zp, 0, "zcollide", 1);
934 dmu_buf_rele(db, NULL);
935 mutex_exit(&zp->z_lock);
936 ZFS_OBJ_HOLD_EXIT(zfsvfs, obj_num);
941 * Not found create new znode/vnode
943 zp = zfs_znode_alloc(zfsvfs, db, doi.doi_data_block_size);
946 vp->v_vflag |= VV_FORCEINSMQ;
947 err = insmntque(vp, zfsvfs->z_vfs);
948 vp->v_vflag &= ~VV_FORCEINSMQ;
949 KASSERT(err == 0, ("insmntque() failed: error %d", err));
952 ZFS_OBJ_HOLD_EXIT(zfsvfs, obj_num);
958 zfs_rezget(znode_t *zp)
960 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
961 dmu_object_info_t doi;
963 uint64_t obj_num = zp->z_id;
966 ZFS_OBJ_HOLD_ENTER(zfsvfs, obj_num);
968 err = dmu_bonus_hold(zfsvfs->z_os, obj_num, NULL, &db);
970 ZFS_OBJ_HOLD_EXIT(zfsvfs, obj_num);
974 dmu_object_info_from_db(db, &doi);
975 if (doi.doi_bonus_type != DMU_OT_ZNODE ||
976 doi.doi_bonus_size < sizeof (znode_phys_t)) {
977 dmu_buf_rele(db, NULL);
978 ZFS_OBJ_HOLD_EXIT(zfsvfs, obj_num);
982 if (((znode_phys_t *)db->db_data)->zp_gen != zp->z_gen) {
983 dmu_buf_rele(db, NULL);
984 ZFS_OBJ_HOLD_EXIT(zfsvfs, obj_num);
988 zfs_znode_dmu_init(zfsvfs, zp, db);
989 zp->z_unlinked = (zp->z_phys->zp_links == 0);
990 zp->z_blksz = doi.doi_data_block_size;
992 ZFS_OBJ_HOLD_EXIT(zfsvfs, obj_num);
998 zfs_znode_delete(znode_t *zp, dmu_tx_t *tx)
1000 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
1001 objset_t *os = zfsvfs->z_os;
1002 uint64_t obj = zp->z_id;
1003 uint64_t acl_obj = zp->z_phys->zp_acl.z_acl_extern_obj;
1005 ZFS_OBJ_HOLD_ENTER(zfsvfs, obj);
1007 VERIFY(0 == dmu_object_free(os, acl_obj, tx));
1008 VERIFY(0 == dmu_object_free(os, obj, tx));
1009 zfs_znode_dmu_fini(zp);
1010 ZFS_OBJ_HOLD_EXIT(zfsvfs, obj);
1015 zfs_zinactive(znode_t *zp)
1017 vnode_t *vp = ZTOV(zp);
1018 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
1019 uint64_t z_id = zp->z_id;
1021 ASSERT(zp->z_dbuf && zp->z_phys);
1024 * Don't allow a zfs_zget() while were trying to release this znode
1026 ZFS_OBJ_HOLD_ENTER(zfsvfs, z_id);
1028 mutex_enter(&zp->z_lock);
1030 if (vp->v_count > 0) {
1032 * If the hold count is greater than zero, somebody has
1033 * obtained a new reference on this znode while we were
1034 * processing it here, so we are done.
1037 mutex_exit(&zp->z_lock);
1038 ZFS_OBJ_HOLD_EXIT(zfsvfs, z_id);
1044 * If this was the last reference to a file with no links,
1045 * remove the file from the file system.
1047 if (zp->z_unlinked) {
1048 mutex_exit(&zp->z_lock);
1049 ZFS_OBJ_HOLD_EXIT(zfsvfs, z_id);
1050 ASSERT(vp->v_count == 0);
1051 vrecycle(vp, curthread);
1055 mutex_exit(&zp->z_lock);
1056 ZFS_OBJ_HOLD_EXIT(zfsvfs, z_id);
1060 zfs_znode_free(znode_t *zp)
1062 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
1064 ASSERT(ZTOV(zp) == NULL);
1065 mutex_enter(&zfsvfs->z_znodes_lock);
1066 POINTER_INVALIDATE(&zp->z_zfsvfs);
1067 list_remove(&zfsvfs->z_all_znodes, zp);
1068 mutex_exit(&zfsvfs->z_znodes_lock);
1070 kmem_cache_free(znode_cache, zp);
1072 VFS_RELE(zfsvfs->z_vfs);
1076 zfs_time_stamper_locked(znode_t *zp, uint_t flag, dmu_tx_t *tx)
1080 ASSERT(MUTEX_HELD(&zp->z_lock));
1085 dmu_buf_will_dirty(zp->z_dbuf, tx);
1086 zp->z_atime_dirty = 0;
1089 zp->z_atime_dirty = 1;
1092 if (flag & AT_ATIME)
1093 ZFS_TIME_ENCODE(&now, zp->z_phys->zp_atime);
1095 if (flag & AT_MTIME) {
1096 ZFS_TIME_ENCODE(&now, zp->z_phys->zp_mtime);
1097 if (zp->z_zfsvfs->z_use_fuids)
1098 zp->z_phys->zp_flags |= (ZFS_ARCHIVE | ZFS_AV_MODIFIED);
1101 if (flag & AT_CTIME) {
1102 ZFS_TIME_ENCODE(&now, zp->z_phys->zp_ctime);
1103 if (zp->z_zfsvfs->z_use_fuids)
1104 zp->z_phys->zp_flags |= ZFS_ARCHIVE;
1109 * Update the requested znode timestamps with the current time.
1110 * If we are in a transaction, then go ahead and mark the znode
1111 * dirty in the transaction so the timestamps will go to disk.
1112 * Otherwise, we will get pushed next time the znode is updated
1113 * in a transaction, or when this znode eventually goes inactive.
1116 * 1 - Only the ACCESS time is ever updated outside of a transaction.
1117 * 2 - Multiple consecutive updates will be collapsed into a single
1118 * znode update by the transaction grouping semantics of the DMU.
1121 zfs_time_stamper(znode_t *zp, uint_t flag, dmu_tx_t *tx)
1123 mutex_enter(&zp->z_lock);
1124 zfs_time_stamper_locked(zp, flag, tx);
1125 mutex_exit(&zp->z_lock);
1129 * Grow the block size for a file.
1131 * IN: zp - znode of file to free data in.
1132 * size - requested block size
1133 * tx - open transaction.
1135 * NOTE: this function assumes that the znode is write locked.
1138 zfs_grow_blocksize(znode_t *zp, uint64_t size, dmu_tx_t *tx)
1143 if (size <= zp->z_blksz)
1146 * If the file size is already greater than the current blocksize,
1147 * we will not grow. If there is more than one block in a file,
1148 * the blocksize cannot change.
1150 if (zp->z_blksz && zp->z_phys->zp_size > zp->z_blksz)
1153 error = dmu_object_set_blocksize(zp->z_zfsvfs->z_os, zp->z_id,
1155 if (error == ENOTSUP)
1157 ASSERT3U(error, ==, 0);
1159 /* What blocksize did we actually get? */
1160 dmu_object_size_from_db(zp->z_dbuf, &zp->z_blksz, &dummy);
1164 * Increase the file length
1166 * IN: zp - znode of file to free data in.
1167 * end - new end-of-file
1169 * RETURN: 0 if success
1170 * error code if failure
1173 zfs_extend(znode_t *zp, uint64_t end)
1175 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
1182 * We will change zp_size, lock the whole file.
1184 rl = zfs_range_lock(zp, 0, UINT64_MAX, RL_WRITER);
1187 * Nothing to do if file already at desired length.
1189 if (end <= zp->z_phys->zp_size) {
1190 zfs_range_unlock(rl);
1194 tx = dmu_tx_create(zfsvfs->z_os);
1195 dmu_tx_hold_bonus(tx, zp->z_id);
1196 if (end > zp->z_blksz &&
1197 (!ISP2(zp->z_blksz) || zp->z_blksz < zfsvfs->z_max_blksz)) {
1199 * We are growing the file past the current block size.
1201 if (zp->z_blksz > zp->z_zfsvfs->z_max_blksz) {
1202 ASSERT(!ISP2(zp->z_blksz));
1203 newblksz = MIN(end, SPA_MAXBLOCKSIZE);
1205 newblksz = MIN(end, zp->z_zfsvfs->z_max_blksz);
1207 dmu_tx_hold_write(tx, zp->z_id, 0, newblksz);
1212 error = dmu_tx_assign(tx, zfsvfs->z_assign);
1214 if (error == ERESTART && zfsvfs->z_assign == TXG_NOWAIT) {
1220 zfs_range_unlock(rl);
1223 dmu_buf_will_dirty(zp->z_dbuf, tx);
1226 zfs_grow_blocksize(zp, newblksz, tx);
1228 zp->z_phys->zp_size = end;
1230 zfs_range_unlock(rl);
1234 rw_enter(&zp->z_map_lock, RW_WRITER);
1235 error = vinvalbuf(ZTOV(zp), V_SAVE, 0, 0);
1237 vnode_pager_setsize(ZTOV(zp), end);
1238 rw_exit(&zp->z_map_lock);
1244 * Free space in a file.
1246 * IN: zp - znode of file to free data in.
1247 * off - start of section to free.
1248 * len - length of section to free.
1250 * RETURN: 0 if success
1251 * error code if failure
1254 zfs_free_range(znode_t *zp, uint64_t off, uint64_t len)
1256 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
1261 * Lock the range being freed.
1263 rl = zfs_range_lock(zp, off, len, RL_WRITER);
1266 * Nothing to do if file already at desired length.
1268 if (off >= zp->z_phys->zp_size) {
1269 zfs_range_unlock(rl);
1273 if (off + len > zp->z_phys->zp_size)
1274 len = zp->z_phys->zp_size - off;
1276 error = dmu_free_long_range(zfsvfs->z_os, zp->z_id, off, len);
1280 * In FreeBSD we cannot free block in the middle of a file,
1281 * but only at the end of a file.
1283 rw_enter(&zp->z_map_lock, RW_WRITER);
1284 error = vinvalbuf(ZTOV(zp), V_SAVE, 0, 0);
1286 vnode_pager_setsize(ZTOV(zp), off);
1287 rw_exit(&zp->z_map_lock);
1290 zfs_range_unlock(rl);
1298 * IN: zp - znode of file to free data in.
1299 * end - new end-of-file.
1301 * RETURN: 0 if success
1302 * error code if failure
1305 zfs_trunc(znode_t *zp, uint64_t end)
1307 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
1308 vnode_t *vp = ZTOV(zp);
1314 * We will change zp_size, lock the whole file.
1316 rl = zfs_range_lock(zp, 0, UINT64_MAX, RL_WRITER);
1319 * Nothing to do if file already at desired length.
1321 if (end >= zp->z_phys->zp_size) {
1322 zfs_range_unlock(rl);
1326 error = dmu_free_long_range(zfsvfs->z_os, zp->z_id, end, -1);
1328 zfs_range_unlock(rl);
1332 tx = dmu_tx_create(zfsvfs->z_os);
1333 dmu_tx_hold_bonus(tx, zp->z_id);
1334 error = dmu_tx_assign(tx, zfsvfs->z_assign);
1336 if (error == ERESTART && zfsvfs->z_assign == TXG_NOWAIT) {
1342 zfs_range_unlock(rl);
1345 dmu_buf_will_dirty(zp->z_dbuf, tx);
1347 zp->z_phys->zp_size = end;
1351 zfs_range_unlock(rl);
1354 * Clear any mapped pages in the truncated region. This has to
1355 * happen outside of the transaction to avoid the possibility of
1356 * a deadlock with someone trying to push a page that we are
1357 * about to invalidate.
1359 rw_enter(&zp->z_map_lock, RW_WRITER);
1361 error = vtruncbuf(vp, curthread->td_ucred, curthread, end, PAGE_SIZE);
1363 error = vinvalbuf(vp, V_SAVE, 0, 0);
1365 vnode_pager_setsize(vp, end);
1367 rw_exit(&zp->z_map_lock);
1373 * Free space in a file
1375 * IN: zp - znode of file to free data in.
1376 * off - start of range
1377 * len - end of range (0 => EOF)
1378 * flag - current file open mode flags.
1379 * log - TRUE if this action should be logged
1381 * RETURN: 0 if success
1382 * error code if failure
1385 zfs_freesp(znode_t *zp, uint64_t off, uint64_t len, int flag, boolean_t log)
1387 vnode_t *vp = ZTOV(zp);
1389 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
1390 zilog_t *zilog = zfsvfs->z_log;
1393 if (off > zp->z_phys->zp_size) {
1394 error = zfs_extend(zp, off+len);
1395 if (error == 0 && log)
1402 error = zfs_trunc(zp, off);
1404 if ((error = zfs_free_range(zp, off, len)) == 0 &&
1405 off + len > zp->z_phys->zp_size)
1406 error = zfs_extend(zp, off+len);
1411 tx = dmu_tx_create(zfsvfs->z_os);
1412 dmu_tx_hold_bonus(tx, zp->z_id);
1413 error = dmu_tx_assign(tx, zfsvfs->z_assign);
1415 if (error == ERESTART && zfsvfs->z_assign == TXG_NOWAIT) {
1424 zfs_time_stamper(zp, CONTENT_MODIFIED, tx);
1425 zfs_log_truncate(zilog, tx, TX_TRUNCATE, zp, off, len);
1432 zfs_create_fs(objset_t *os, cred_t *cr, nvlist_t *zplprops, dmu_tx_t *tx)
1435 uint64_t moid, doid, version;
1436 uint64_t sense = ZFS_CASE_SENSITIVE;
1440 znode_t *rootzp = NULL;
1446 * First attempt to create master node.
1449 * In an empty objset, there are no blocks to read and thus
1450 * there can be no i/o errors (which we assert below).
1452 moid = MASTER_NODE_OBJ;
1453 error = zap_create_claim(os, moid, DMU_OT_MASTER_NODE,
1454 DMU_OT_NONE, 0, tx);
1458 * Set starting attributes.
1460 if (spa_version(dmu_objset_spa(os)) >= SPA_VERSION_FUID)
1461 version = ZPL_VERSION;
1463 version = ZPL_VERSION_FUID - 1;
1464 error = zap_update(os, moid, ZPL_VERSION_STR,
1465 8, 1, &version, tx);
1467 while ((elem = nvlist_next_nvpair(zplprops, elem)) != NULL) {
1468 /* For the moment we expect all zpl props to be uint64_ts */
1472 ASSERT(nvpair_type(elem) == DATA_TYPE_UINT64);
1473 VERIFY(nvpair_value_uint64(elem, &val) == 0);
1474 name = nvpair_name(elem);
1475 if (strcmp(name, zfs_prop_to_name(ZFS_PROP_VERSION)) == 0) {
1477 error = zap_update(os, moid, ZPL_VERSION_STR,
1478 8, 1, &version, tx);
1480 error = zap_update(os, moid, name, 8, 1, &val, tx);
1483 if (strcmp(name, zfs_prop_to_name(ZFS_PROP_NORMALIZE)) == 0)
1485 else if (strcmp(name, zfs_prop_to_name(ZFS_PROP_CASE)) == 0)
1488 ASSERT(version != 0);
1491 * Create a delete queue.
1493 doid = zap_create(os, DMU_OT_UNLINKED_SET, DMU_OT_NONE, 0, tx);
1495 error = zap_add(os, moid, ZFS_UNLINKED_SET, 8, 1, &doid, tx);
1499 * Create root znode. Create minimal znode/vnode/zfsvfs
1500 * to allow zfs_mknode to work.
1503 vattr.va_mask = AT_MODE|AT_UID|AT_GID|AT_TYPE;
1504 vattr.va_type = VDIR;
1505 vattr.va_mode = S_IFDIR|0755;
1506 vattr.va_uid = crgetuid(cr);
1507 vattr.va_gid = crgetgid(cr);
1509 rootzp = kmem_cache_alloc(znode_cache, KM_SLEEP);
1510 zfs_znode_cache_constructor(rootzp, NULL, 0);
1511 rootzp->z_unlinked = 0;
1512 rootzp->z_atime_dirty = 0;
1514 vnode.v_type = VDIR;
1515 vnode.v_data = rootzp;
1516 rootzp->z_vnode = &vnode;
1518 bzero(&zfsvfs, sizeof (zfsvfs_t));
1521 zfsvfs.z_assign = TXG_NOWAIT;
1522 zfsvfs.z_parent = &zfsvfs;
1523 zfsvfs.z_version = version;
1524 zfsvfs.z_use_fuids = USE_FUIDS(version, os);
1525 zfsvfs.z_norm = norm;
1527 * Fold case on file systems that are always or sometimes case
1530 if (sense == ZFS_CASE_INSENSITIVE || sense == ZFS_CASE_MIXED)
1531 zfsvfs.z_norm |= U8_TEXTPREP_TOUPPER;
1533 mutex_init(&zfsvfs.z_znodes_lock, NULL, MUTEX_DEFAULT, NULL);
1534 list_create(&zfsvfs.z_all_znodes, sizeof (znode_t),
1535 offsetof(znode_t, z_link_node));
1537 ASSERT(!POINTER_IS_VALID(rootzp->z_zfsvfs));
1538 rootzp->z_zfsvfs = &zfsvfs;
1539 zfs_mknode(rootzp, &vattr, tx, cr, IS_ROOT_NODE, &zp, 0, NULL, NULL);
1540 ASSERT3P(zp, ==, rootzp);
1541 error = zap_add(os, moid, ZFS_ROOT_OBJ, 8, 1, &rootzp->z_id, tx);
1543 POINTER_INVALIDATE(&rootzp->z_zfsvfs);
1545 dmu_buf_rele(rootzp->z_dbuf, NULL);
1546 rootzp->z_dbuf = NULL;
1547 mutex_destroy(&zfsvfs.z_znodes_lock);
1548 rootzp->z_vnode = NULL;
1549 kmem_cache_free(znode_cache, rootzp);
1552 #endif /* _KERNEL */
1554 * Given an object number, return its parent object number and whether
1555 * or not the object is an extended attribute directory.
1558 zfs_obj_to_pobj(objset_t *osp, uint64_t obj, uint64_t *pobjp, int *is_xattrdir)
1561 dmu_object_info_t doi;
1565 if ((error = dmu_bonus_hold(osp, obj, FTAG, &db)) != 0)
1568 dmu_object_info_from_db(db, &doi);
1569 if (doi.doi_bonus_type != DMU_OT_ZNODE ||
1570 doi.doi_bonus_size < sizeof (znode_phys_t)) {
1571 dmu_buf_rele(db, FTAG);
1576 *pobjp = zp->zp_parent;
1577 *is_xattrdir = ((zp->zp_flags & ZFS_XATTR) != 0) &&
1578 S_ISDIR(zp->zp_mode);
1579 dmu_buf_rele(db, FTAG);
1585 zfs_obj_to_path(objset_t *osp, uint64_t obj, char *buf, int len)
1587 char *path = buf + len - 1;
1594 char component[MAXNAMELEN + 2];
1598 if ((error = zfs_obj_to_pobj(osp, obj, &pobj,
1599 &is_xattrdir)) != 0)
1610 (void) sprintf(component + 1, "<xattrdir>");
1612 error = zap_value_search(osp, pobj, obj,
1613 ZFS_DIRENT_OBJ(-1ULL), component + 1);
1618 complen = strlen(component);
1620 ASSERT(path >= buf);
1621 bcopy(component, path, complen);
1626 (void) memmove(buf, path, buf + len - path);