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/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_map_lock, NULL, RW_DEFAULT, NULL);
121 rw_init(&zp->z_parent_lock, NULL, RW_DEFAULT, NULL);
122 rw_init(&zp->z_name_lock, NULL, RW_DEFAULT, NULL);
123 mutex_init(&zp->z_acl_lock, NULL, MUTEX_DEFAULT, NULL);
125 mutex_init(&zp->z_range_lock, NULL, MUTEX_DEFAULT, NULL);
126 avl_create(&zp->z_range_avl, zfs_range_compare,
127 sizeof (rl_t), offsetof(rl_t, r_node));
130 zp->z_dirlocks = NULL;
136 zfs_znode_cache_destructor(void *buf, void *arg)
140 ASSERT(!POINTER_IS_VALID(zp->z_zfsvfs));
141 ASSERT(ZTOV(zp)->v_data == zp);
143 ASSERT(!list_link_active(&zp->z_link_node));
144 mutex_destroy(&zp->z_lock);
145 rw_destroy(&zp->z_map_lock);
146 rw_destroy(&zp->z_parent_lock);
147 rw_destroy(&zp->z_name_lock);
148 mutex_destroy(&zp->z_acl_lock);
149 avl_destroy(&zp->z_range_avl);
150 mutex_destroy(&zp->z_range_lock);
152 ASSERT(zp->z_dbuf == NULL);
153 ASSERT(zp->z_dirlocks == NULL);
158 uint64_t zms_zfsvfs_invalid;
159 uint64_t zms_zfsvfs_unmounted;
160 uint64_t zms_zfsvfs_recheck_invalid;
161 uint64_t zms_obj_held;
162 uint64_t zms_vnode_locked;
163 uint64_t zms_not_only_dnlc;
165 #endif /* ZNODE_STATS */
168 zfs_znode_move_impl(znode_t *ozp, znode_t *nzp)
173 nzp->z_zfsvfs = ozp->z_zfsvfs;
177 nzp->z_vnode = ozp->z_vnode;
178 ozp->z_vnode = vp; /* let destructor free the overwritten vnode */
179 ZTOV(ozp)->v_data = ozp;
180 ZTOV(nzp)->v_data = nzp;
182 nzp->z_id = ozp->z_id;
183 ASSERT(ozp->z_dirlocks == NULL); /* znode not in use */
184 ASSERT(avl_numnodes(&ozp->z_range_avl) == 0);
185 nzp->z_unlinked = ozp->z_unlinked;
186 nzp->z_atime_dirty = ozp->z_atime_dirty;
187 nzp->z_zn_prefetch = ozp->z_zn_prefetch;
188 nzp->z_blksz = ozp->z_blksz;
189 nzp->z_seq = ozp->z_seq;
190 nzp->z_mapcnt = ozp->z_mapcnt;
191 nzp->z_last_itx = ozp->z_last_itx;
192 nzp->z_gen = ozp->z_gen;
193 nzp->z_sync_cnt = ozp->z_sync_cnt;
194 nzp->z_phys = ozp->z_phys;
195 nzp->z_dbuf = ozp->z_dbuf;
197 /* Update back pointers. */
198 (void) dmu_buf_update_user(nzp->z_dbuf, ozp, nzp, &nzp->z_phys,
202 * Invalidate the original znode by clearing fields that provide a
203 * pointer back to the znode. Set the low bit of the vfs pointer to
204 * ensure that zfs_znode_move() recognizes the znode as invalid in any
205 * subsequent callback.
208 POINTER_INVALIDATE(&ozp->z_zfsvfs);
212 * Wrapper function for ZFS_ENTER that returns 0 if successful and otherwise
213 * returns a non-zero error code.
216 zfs_enter(zfsvfs_t *zfsvfs)
224 zfs_znode_move(void *buf, void *newbuf, size_t size, void *arg)
226 znode_t *ozp = buf, *nzp = newbuf;
231 * The znode is on the file system's list of known znodes if the vfs
232 * pointer is valid. We set the low bit of the vfs pointer when freeing
233 * the znode to invalidate it, and the memory patterns written by kmem
234 * (baddcafe and deadbeef) set at least one of the two low bits. A newly
235 * created znode sets the vfs pointer last of all to indicate that the
236 * znode is known and in a valid state to be moved by this function.
238 zfsvfs = ozp->z_zfsvfs;
239 if (!POINTER_IS_VALID(zfsvfs)) {
240 ZNODE_STAT_ADD(znode_move_stats.zms_zfsvfs_invalid);
241 return (KMEM_CBRC_DONT_KNOW);
245 * Ensure that the filesystem is not unmounted during the move.
247 if (zfs_enter(zfsvfs) != 0) { /* ZFS_ENTER */
248 ZNODE_STAT_ADD(znode_move_stats.zms_zfsvfs_unmounted);
249 return (KMEM_CBRC_DONT_KNOW);
252 mutex_enter(&zfsvfs->z_znodes_lock);
254 * Recheck the vfs pointer in case the znode was removed just before
255 * acquiring the lock.
257 if (zfsvfs != ozp->z_zfsvfs) {
258 mutex_exit(&zfsvfs->z_znodes_lock);
260 ZNODE_STAT_ADD(znode_move_stats.zms_zfsvfs_recheck_invalid);
261 return (KMEM_CBRC_DONT_KNOW);
265 * At this point we know that as long as we hold z_znodes_lock, the
266 * znode cannot be freed and fields within the znode can be safely
267 * accessed. Now, prevent a race with zfs_zget().
269 if (ZFS_OBJ_HOLD_TRYENTER(zfsvfs, ozp->z_id) == 0) {
270 mutex_exit(&zfsvfs->z_znodes_lock);
272 ZNODE_STAT_ADD(znode_move_stats.zms_obj_held);
273 return (KMEM_CBRC_LATER);
277 if (mutex_tryenter(&vp->v_lock) == 0) {
278 ZFS_OBJ_HOLD_EXIT(zfsvfs, ozp->z_id);
279 mutex_exit(&zfsvfs->z_znodes_lock);
281 ZNODE_STAT_ADD(znode_move_stats.zms_vnode_locked);
282 return (KMEM_CBRC_LATER);
285 /* Only move znodes that are referenced _only_ by the DNLC. */
286 if (vp->v_count != 1 || !vn_in_dnlc(vp)) {
287 mutex_exit(&vp->v_lock);
288 ZFS_OBJ_HOLD_EXIT(zfsvfs, ozp->z_id);
289 mutex_exit(&zfsvfs->z_znodes_lock);
291 ZNODE_STAT_ADD(znode_move_stats.zms_not_only_dnlc);
292 return (KMEM_CBRC_LATER);
296 * The znode is known and in a valid state to move. We're holding the
297 * locks needed to execute the critical section.
299 zfs_znode_move_impl(ozp, nzp);
300 mutex_exit(&vp->v_lock);
301 ZFS_OBJ_HOLD_EXIT(zfsvfs, ozp->z_id);
303 list_link_replace(&ozp->z_link_node, &nzp->z_link_node);
304 mutex_exit(&zfsvfs->z_znodes_lock);
307 return (KMEM_CBRC_YES);
316 ASSERT(znode_cache == NULL);
317 znode_cache = kmem_cache_create("zfs_znode_cache",
318 sizeof (znode_t), 0, zfs_znode_cache_constructor,
319 zfs_znode_cache_destructor, NULL, NULL, NULL, 0);
320 kmem_cache_set_move(znode_cache, zfs_znode_move);
327 * Cleanup vfs & vnode ops
329 zfs_remove_op_tables();
335 kmem_cache_destroy(znode_cache);
339 struct vnodeops *zfs_dvnodeops;
340 struct vnodeops *zfs_fvnodeops;
341 struct vnodeops *zfs_symvnodeops;
342 struct vnodeops *zfs_xdvnodeops;
343 struct vnodeops *zfs_evnodeops;
346 zfs_remove_op_tables()
352 (void) vfs_freevfsops_by_type(zfsfstype);
359 vn_freevnodeops(zfs_dvnodeops);
361 vn_freevnodeops(zfs_fvnodeops);
363 vn_freevnodeops(zfs_symvnodeops);
365 vn_freevnodeops(zfs_xdvnodeops);
367 vn_freevnodeops(zfs_evnodeops);
369 zfs_dvnodeops = NULL;
370 zfs_fvnodeops = NULL;
371 zfs_symvnodeops = NULL;
372 zfs_xdvnodeops = NULL;
373 zfs_evnodeops = NULL;
376 extern const fs_operation_def_t zfs_dvnodeops_template[];
377 extern const fs_operation_def_t zfs_fvnodeops_template[];
378 extern const fs_operation_def_t zfs_xdvnodeops_template[];
379 extern const fs_operation_def_t zfs_symvnodeops_template[];
380 extern const fs_operation_def_t zfs_evnodeops_template[];
383 zfs_create_op_tables()
388 * zfs_dvnodeops can be set if mod_remove() calls mod_installfs()
389 * due to a failure to remove the the 2nd modlinkage (zfs_modldrv).
390 * In this case we just return as the ops vectors are already set up.
395 error = vn_make_ops(MNTTYPE_ZFS, zfs_dvnodeops_template,
400 error = vn_make_ops(MNTTYPE_ZFS, zfs_fvnodeops_template,
405 error = vn_make_ops(MNTTYPE_ZFS, zfs_symvnodeops_template,
410 error = vn_make_ops(MNTTYPE_ZFS, zfs_xdvnodeops_template,
415 error = vn_make_ops(MNTTYPE_ZFS, zfs_evnodeops_template,
422 * zfs_init_fs - Initialize the zfsvfs struct and the file system
423 * incore "master" object. Verify version compatibility.
426 zfs_init_fs(zfsvfs_t *zfsvfs, znode_t **zpp)
428 extern int zfsfstype;
430 objset_t *os = zfsvfs->z_os;
437 error = zfs_get_zplprop(os, ZFS_PROP_VERSION, &zfsvfs->z_version);
440 } else if (zfsvfs->z_version > ZPL_VERSION) {
441 (void) printf("Mismatched versions: File system "
442 "is version %llu on-disk format, which is "
443 "incompatible with this software version %lld!",
444 (u_longlong_t)zfsvfs->z_version, ZPL_VERSION);
448 if ((error = zfs_get_zplprop(os, ZFS_PROP_NORMALIZE, &zval)) != 0)
450 zfsvfs->z_norm = (int)zval;
451 if ((error = zfs_get_zplprop(os, ZFS_PROP_UTF8ONLY, &zval)) != 0)
453 zfsvfs->z_utf8 = (zval != 0);
454 if ((error = zfs_get_zplprop(os, ZFS_PROP_CASE, &zval)) != 0)
456 zfsvfs->z_case = (uint_t)zval;
458 * Fold case on file systems that are always or sometimes case
461 if (zfsvfs->z_case == ZFS_CASE_INSENSITIVE ||
462 zfsvfs->z_case == ZFS_CASE_MIXED)
463 zfsvfs->z_norm |= U8_TEXTPREP_TOUPPER;
466 * The fsid is 64 bits, composed of an 8-bit fs type, which
467 * separates our fsid from any other filesystem types, and a
468 * 56-bit objset unique ID. The objset unique ID is unique to
469 * all objsets open on this system, provided by unique_create().
470 * The 8-bit fs type must be put in the low bits of fsid[1]
471 * because that's where other Solaris filesystems put it.
473 fsid_guid = dmu_objset_fsid_guid(os);
474 ASSERT((fsid_guid & ~((1ULL<<56)-1)) == 0);
475 zfsvfs->z_vfs->vfs_fsid.val[0] = fsid_guid;
476 zfsvfs->z_vfs->vfs_fsid.val[1] = ((fsid_guid>>32) << 8) |
479 error = zap_lookup(os, MASTER_NODE_OBJ, ZFS_ROOT_OBJ, 8, 1,
483 ASSERT(zfsvfs->z_root != 0);
485 error = zap_lookup(os, MASTER_NODE_OBJ, ZFS_UNLINKED_SET, 8, 1,
486 &zfsvfs->z_unlinkedobj);
491 * Initialize zget mutex's
493 for (i = 0; i != ZFS_OBJ_MTX_SZ; i++)
494 mutex_init(&zfsvfs->z_hold_mtx[i], NULL, MUTEX_DEFAULT, NULL);
496 error = zfs_zget(zfsvfs, zfsvfs->z_root, zpp);
499 * On error, we destroy the mutexes here since it's not
500 * possible for the caller to determine if the mutexes were
501 * initialized properly.
503 for (i = 0; i != ZFS_OBJ_MTX_SZ; i++)
504 mutex_destroy(&zfsvfs->z_hold_mtx[i]);
507 ASSERT3U((*zpp)->z_id, ==, zfsvfs->z_root);
508 error = zap_lookup(os, MASTER_NODE_OBJ, ZFS_FUID_TABLES, 8, 1,
509 &zfsvfs->z_fuid_obj);
517 * define a couple of values we need available
518 * for both 64 and 32 bit environments.
521 #define NBITSMINOR64 32
524 #define MAXMAJ64 0xffffffffUL
527 #define MAXMIN64 0xffffffffUL
531 * Create special expldev for ZFS private use.
532 * Can't use standard expldev since it doesn't do
533 * what we want. The standard expldev() takes a
534 * dev32_t in LP64 and expands it to a long dev_t.
535 * We need an interface that takes a dev32_t in ILP32
536 * and expands it to a long dev_t.
539 zfs_expldev(dev_t dev)
542 major_t major = (major_t)dev >> NBITSMINOR32 & MAXMAJ32;
543 return (((uint64_t)major << NBITSMINOR64) |
544 ((minor_t)dev & MAXMIN32));
551 * Special cmpldev for ZFS private use.
552 * Can't use standard cmpldev since it takes
553 * a long dev_t and compresses it to dev32_t in
554 * LP64. We need to do a compaction of a long dev_t
555 * to a dev32_t in ILP32.
558 zfs_cmpldev(uint64_t dev)
561 minor_t minor = (minor_t)dev & MAXMIN64;
562 major_t major = (major_t)(dev >> NBITSMINOR64) & MAXMAJ64;
564 if (major > MAXMAJ32 || minor > MAXMIN32)
567 return (((dev32_t)major << NBITSMINOR32) | minor);
574 zfs_znode_dmu_init(zfsvfs_t *zfsvfs, znode_t *zp, dmu_buf_t *db)
578 ASSERT(!POINTER_IS_VALID(zp->z_zfsvfs) || (zfsvfs == zp->z_zfsvfs));
579 ASSERT(MUTEX_HELD(ZFS_OBJ_MUTEX(zfsvfs, zp->z_id)));
581 mutex_enter(&zp->z_lock);
583 ASSERT(zp->z_dbuf == NULL);
585 nzp = dmu_buf_set_user_ie(db, zp, &zp->z_phys, znode_evict_error);
589 * concurrent zgets on this object.
592 panic("existing znode %p for dbuf %p", (void *)nzp, (void *)db);
595 * Slap on VROOT if we are the root znode
597 if (zp->z_id == zfsvfs->z_root)
598 ZTOV(zp)->v_flag |= VROOT;
600 mutex_exit(&zp->z_lock);
605 zfs_znode_dmu_fini(znode_t *zp)
607 dmu_buf_t *db = zp->z_dbuf;
608 ASSERT(MUTEX_HELD(ZFS_OBJ_MUTEX(zp->z_zfsvfs, zp->z_id)) ||
610 RW_WRITE_HELD(&zp->z_zfsvfs->z_teardown_inactive_lock));
611 ASSERT(zp->z_dbuf != NULL);
613 VERIFY(zp == dmu_buf_update_user(db, zp, NULL, NULL, NULL));
614 dmu_buf_rele(db, NULL);
618 * Construct a new znode/vnode and intialize.
620 * This does not do a call to dmu_set_user() that is
621 * up to the caller to do, in case you don't want to
625 zfs_znode_alloc(zfsvfs_t *zfsvfs, dmu_buf_t *db, int blksz)
630 zp = kmem_cache_alloc(znode_cache, KM_SLEEP);
632 ASSERT(zp->z_dirlocks == NULL);
633 ASSERT(zp->z_dbuf == NULL);
634 ASSERT(!POINTER_IS_VALID(zp->z_zfsvfs));
637 * Defer setting z_zfsvfs until the znode is ready to be a candidate for
638 * the zfs_znode_move() callback.
642 zp->z_atime_dirty = 0;
645 zp->z_id = db->db_object;
647 zp->z_seq = 0x7A4653;
653 zfs_znode_dmu_init(zfsvfs, zp, db);
655 zp->z_gen = zp->z_phys->zp_gen;
657 vp->v_vfsp = zfsvfs->z_parent->z_vfs;
658 vp->v_type = IFTOVT((mode_t)zp->z_phys->zp_mode);
660 switch (vp->v_type) {
662 if (zp->z_phys->zp_flags & ZFS_XATTR) {
663 vn_setops(vp, zfs_xdvnodeops);
664 vp->v_flag |= V_XATTRDIR;
666 vn_setops(vp, zfs_dvnodeops);
668 zp->z_zn_prefetch = B_TRUE; /* z_prefetch default is enabled */
672 vp->v_rdev = zfs_cmpldev(zp->z_phys->zp_rdev);
677 vn_setops(vp, zfs_fvnodeops);
680 vp->v_flag |= VMODSORT;
681 vn_setops(vp, zfs_fvnodeops);
684 vn_setops(vp, zfs_symvnodeops);
687 vn_setops(vp, zfs_evnodeops);
691 mutex_enter(&zfsvfs->z_znodes_lock);
692 list_insert_tail(&zfsvfs->z_all_znodes, zp);
695 * Everything else must be valid before assigning z_zfsvfs makes the
696 * znode eligible for zfs_znode_move().
698 zp->z_zfsvfs = zfsvfs;
699 mutex_exit(&zfsvfs->z_znodes_lock);
701 VFS_HOLD(zfsvfs->z_vfs);
706 * Create a new DMU object to hold a zfs znode.
708 * IN: dzp - parent directory for new znode
709 * vap - file attributes for new znode
710 * tx - dmu transaction id for zap operations
711 * cr - credentials of caller
713 * IS_ROOT_NODE - new object will be root
714 * IS_XATTR - new object is an attribute
715 * IS_REPLAY - intent log replay
716 * bonuslen - length of bonus buffer
717 * setaclp - File/Dir initial ACL
718 * fuidp - Tracks fuid allocation.
720 * OUT: zpp - allocated znode
724 zfs_mknode(znode_t *dzp, vattr_t *vap, dmu_tx_t *tx, cred_t *cr,
725 uint_t flag, znode_t **zpp, int bonuslen, zfs_acl_t *setaclp,
726 zfs_fuid_info_t **fuidp)
730 zfsvfs_t *zfsvfs = dzp->z_zfsvfs;
735 ASSERT(vap && (vap->va_mask & (AT_TYPE|AT_MODE)) == (AT_TYPE|AT_MODE));
737 if (zfsvfs->z_replay) {
738 obj = vap->va_nodeid;
740 now = vap->va_ctime; /* see zfs_replay_create() */
741 gen = vap->va_nblocks; /* ditto */
745 gen = dmu_tx_get_txg(tx);
749 * Create a new DMU object.
752 * There's currently no mechanism for pre-reading the blocks that will
753 * be to needed allocate a new object, so we accept the small chance
754 * that there will be an i/o error and we will fail one of the
757 if (vap->va_type == VDIR) {
758 if (flag & IS_REPLAY) {
759 err = zap_create_claim_norm(zfsvfs->z_os, obj,
760 zfsvfs->z_norm, DMU_OT_DIRECTORY_CONTENTS,
761 DMU_OT_ZNODE, sizeof (znode_phys_t) + bonuslen, tx);
762 ASSERT3U(err, ==, 0);
764 obj = zap_create_norm(zfsvfs->z_os,
765 zfsvfs->z_norm, DMU_OT_DIRECTORY_CONTENTS,
766 DMU_OT_ZNODE, sizeof (znode_phys_t) + bonuslen, tx);
769 if (flag & IS_REPLAY) {
770 err = dmu_object_claim(zfsvfs->z_os, obj,
771 DMU_OT_PLAIN_FILE_CONTENTS, 0,
772 DMU_OT_ZNODE, sizeof (znode_phys_t) + bonuslen, tx);
773 ASSERT3U(err, ==, 0);
775 obj = dmu_object_alloc(zfsvfs->z_os,
776 DMU_OT_PLAIN_FILE_CONTENTS, 0,
777 DMU_OT_ZNODE, sizeof (znode_phys_t) + bonuslen, tx);
780 VERIFY(0 == dmu_bonus_hold(zfsvfs->z_os, obj, NULL, &db));
781 dmu_buf_will_dirty(db, tx);
784 * Initialize the znode physical data to zero.
786 ASSERT(db->db_size >= sizeof (znode_phys_t));
787 bzero(db->db_data, db->db_size);
791 * If this is the root, fix up the half-initialized parent pointer
792 * to reference the just-allocated physical data area.
794 if (flag & IS_ROOT_NODE) {
801 * If parent is an xattr, so am I.
803 if (dzp->z_phys->zp_flags & ZFS_XATTR)
806 if (vap->va_type == VBLK || vap->va_type == VCHR) {
807 pzp->zp_rdev = zfs_expldev(vap->va_rdev);
810 if (zfsvfs->z_use_fuids)
811 pzp->zp_flags = ZFS_ARCHIVE | ZFS_AV_MODIFIED;
813 if (vap->va_type == VDIR) {
814 pzp->zp_size = 2; /* contents ("." and "..") */
815 pzp->zp_links = (flag & (IS_ROOT_NODE | IS_XATTR)) ? 2 : 1;
818 pzp->zp_parent = dzp->z_id;
820 pzp->zp_flags |= ZFS_XATTR;
824 ZFS_TIME_ENCODE(&now, pzp->zp_crtime);
825 ZFS_TIME_ENCODE(&now, pzp->zp_ctime);
827 if (vap->va_mask & AT_ATIME) {
828 ZFS_TIME_ENCODE(&vap->va_atime, pzp->zp_atime);
830 ZFS_TIME_ENCODE(&now, pzp->zp_atime);
833 if (vap->va_mask & AT_MTIME) {
834 ZFS_TIME_ENCODE(&vap->va_mtime, pzp->zp_mtime);
836 ZFS_TIME_ENCODE(&now, pzp->zp_mtime);
839 pzp->zp_mode = MAKEIMODE(vap->va_type, vap->va_mode);
840 if (!(flag & IS_ROOT_NODE)) {
841 ZFS_OBJ_HOLD_ENTER(zfsvfs, obj);
842 *zpp = zfs_znode_alloc(zfsvfs, db, 0);
843 ZFS_OBJ_HOLD_EXIT(zfsvfs, obj);
846 * If we are creating the root node, the "parent" we
847 * passed in is the znode for the root.
851 zfs_perm_init(*zpp, dzp, flag, vap, tx, cr, setaclp, fuidp);
855 zfs_xvattr_set(znode_t *zp, xvattr_t *xvap)
859 xoap = xva_getxoptattr(xvap);
862 if (XVA_ISSET_REQ(xvap, XAT_CREATETIME)) {
863 ZFS_TIME_ENCODE(&xoap->xoa_createtime, zp->z_phys->zp_crtime);
864 XVA_SET_RTN(xvap, XAT_CREATETIME);
866 if (XVA_ISSET_REQ(xvap, XAT_READONLY)) {
867 ZFS_ATTR_SET(zp, ZFS_READONLY, xoap->xoa_readonly);
868 XVA_SET_RTN(xvap, XAT_READONLY);
870 if (XVA_ISSET_REQ(xvap, XAT_HIDDEN)) {
871 ZFS_ATTR_SET(zp, ZFS_HIDDEN, xoap->xoa_hidden);
872 XVA_SET_RTN(xvap, XAT_HIDDEN);
874 if (XVA_ISSET_REQ(xvap, XAT_SYSTEM)) {
875 ZFS_ATTR_SET(zp, ZFS_SYSTEM, xoap->xoa_system);
876 XVA_SET_RTN(xvap, XAT_SYSTEM);
878 if (XVA_ISSET_REQ(xvap, XAT_ARCHIVE)) {
879 ZFS_ATTR_SET(zp, ZFS_ARCHIVE, xoap->xoa_archive);
880 XVA_SET_RTN(xvap, XAT_ARCHIVE);
882 if (XVA_ISSET_REQ(xvap, XAT_IMMUTABLE)) {
883 ZFS_ATTR_SET(zp, ZFS_IMMUTABLE, xoap->xoa_immutable);
884 XVA_SET_RTN(xvap, XAT_IMMUTABLE);
886 if (XVA_ISSET_REQ(xvap, XAT_NOUNLINK)) {
887 ZFS_ATTR_SET(zp, ZFS_NOUNLINK, xoap->xoa_nounlink);
888 XVA_SET_RTN(xvap, XAT_NOUNLINK);
890 if (XVA_ISSET_REQ(xvap, XAT_APPENDONLY)) {
891 ZFS_ATTR_SET(zp, ZFS_APPENDONLY, xoap->xoa_appendonly);
892 XVA_SET_RTN(xvap, XAT_APPENDONLY);
894 if (XVA_ISSET_REQ(xvap, XAT_NODUMP)) {
895 ZFS_ATTR_SET(zp, ZFS_NODUMP, xoap->xoa_nodump);
896 XVA_SET_RTN(xvap, XAT_NODUMP);
898 if (XVA_ISSET_REQ(xvap, XAT_OPAQUE)) {
899 ZFS_ATTR_SET(zp, ZFS_OPAQUE, xoap->xoa_opaque);
900 XVA_SET_RTN(xvap, XAT_OPAQUE);
902 if (XVA_ISSET_REQ(xvap, XAT_AV_QUARANTINED)) {
903 ZFS_ATTR_SET(zp, ZFS_AV_QUARANTINED,
904 xoap->xoa_av_quarantined);
905 XVA_SET_RTN(xvap, XAT_AV_QUARANTINED);
907 if (XVA_ISSET_REQ(xvap, XAT_AV_MODIFIED)) {
908 ZFS_ATTR_SET(zp, ZFS_AV_MODIFIED, xoap->xoa_av_modified);
909 XVA_SET_RTN(xvap, XAT_AV_MODIFIED);
911 if (XVA_ISSET_REQ(xvap, XAT_AV_SCANSTAMP)) {
912 (void) memcpy(zp->z_phys + 1, xoap->xoa_av_scanstamp,
913 sizeof (xoap->xoa_av_scanstamp));
914 zp->z_phys->zp_flags |= ZFS_BONUS_SCANSTAMP;
915 XVA_SET_RTN(xvap, XAT_AV_SCANSTAMP);
920 zfs_zget(zfsvfs_t *zfsvfs, uint64_t obj_num, znode_t **zpp)
922 dmu_object_info_t doi;
929 ZFS_OBJ_HOLD_ENTER(zfsvfs, obj_num);
931 err = dmu_bonus_hold(zfsvfs->z_os, obj_num, NULL, &db);
933 ZFS_OBJ_HOLD_EXIT(zfsvfs, obj_num);
937 dmu_object_info_from_db(db, &doi);
938 if (doi.doi_bonus_type != DMU_OT_ZNODE ||
939 doi.doi_bonus_size < sizeof (znode_phys_t)) {
940 dmu_buf_rele(db, NULL);
941 ZFS_OBJ_HOLD_EXIT(zfsvfs, obj_num);
945 zp = dmu_buf_get_user(db);
947 mutex_enter(&zp->z_lock);
950 * Since we do immediate eviction of the z_dbuf, we
951 * should never find a dbuf with a znode that doesn't
952 * know about the dbuf.
954 ASSERT3P(zp->z_dbuf, ==, db);
955 ASSERT3U(zp->z_id, ==, obj_num);
956 if (zp->z_unlinked) {
963 dmu_buf_rele(db, NULL);
964 mutex_exit(&zp->z_lock);
965 ZFS_OBJ_HOLD_EXIT(zfsvfs, obj_num);
970 * Not found create new znode/vnode
972 zp = zfs_znode_alloc(zfsvfs, db, doi.doi_data_block_size);
973 ZFS_OBJ_HOLD_EXIT(zfsvfs, obj_num);
979 zfs_rezget(znode_t *zp)
981 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
982 dmu_object_info_t doi;
984 uint64_t obj_num = zp->z_id;
987 ZFS_OBJ_HOLD_ENTER(zfsvfs, obj_num);
989 err = dmu_bonus_hold(zfsvfs->z_os, obj_num, NULL, &db);
991 ZFS_OBJ_HOLD_EXIT(zfsvfs, obj_num);
995 dmu_object_info_from_db(db, &doi);
996 if (doi.doi_bonus_type != DMU_OT_ZNODE ||
997 doi.doi_bonus_size < sizeof (znode_phys_t)) {
998 dmu_buf_rele(db, NULL);
999 ZFS_OBJ_HOLD_EXIT(zfsvfs, obj_num);
1003 if (((znode_phys_t *)db->db_data)->zp_gen != zp->z_gen) {
1004 dmu_buf_rele(db, NULL);
1005 ZFS_OBJ_HOLD_EXIT(zfsvfs, obj_num);
1009 zfs_znode_dmu_init(zfsvfs, zp, db);
1010 zp->z_unlinked = (zp->z_phys->zp_links == 0);
1011 zp->z_blksz = doi.doi_data_block_size;
1013 ZFS_OBJ_HOLD_EXIT(zfsvfs, obj_num);
1019 zfs_znode_delete(znode_t *zp, dmu_tx_t *tx)
1021 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
1022 objset_t *os = zfsvfs->z_os;
1023 uint64_t obj = zp->z_id;
1024 uint64_t acl_obj = zp->z_phys->zp_acl.z_acl_extern_obj;
1026 ZFS_OBJ_HOLD_ENTER(zfsvfs, obj);
1028 VERIFY(0 == dmu_object_free(os, acl_obj, tx));
1029 VERIFY(0 == dmu_object_free(os, obj, tx));
1030 zfs_znode_dmu_fini(zp);
1031 ZFS_OBJ_HOLD_EXIT(zfsvfs, obj);
1036 zfs_zinactive(znode_t *zp)
1038 vnode_t *vp = ZTOV(zp);
1039 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
1040 uint64_t z_id = zp->z_id;
1042 ASSERT(zp->z_dbuf && zp->z_phys);
1045 * Don't allow a zfs_zget() while were trying to release this znode
1047 ZFS_OBJ_HOLD_ENTER(zfsvfs, z_id);
1049 mutex_enter(&zp->z_lock);
1050 mutex_enter(&vp->v_lock);
1052 if (vp->v_count > 0 || vn_has_cached_data(vp)) {
1054 * If the hold count is greater than zero, somebody has
1055 * obtained a new reference on this znode while we were
1056 * processing it here, so we are done. If we still have
1057 * mapped pages then we are also done, since we don't
1058 * want to inactivate the znode until the pages get pushed.
1060 * XXX - if vn_has_cached_data(vp) is true, but count == 0,
1061 * this seems like it would leave the znode hanging with
1062 * no chance to go inactive...
1064 mutex_exit(&vp->v_lock);
1065 mutex_exit(&zp->z_lock);
1066 ZFS_OBJ_HOLD_EXIT(zfsvfs, z_id);
1069 mutex_exit(&vp->v_lock);
1072 * If this was the last reference to a file with no links,
1073 * remove the file from the file system.
1075 if (zp->z_unlinked) {
1076 mutex_exit(&zp->z_lock);
1077 ZFS_OBJ_HOLD_EXIT(zfsvfs, z_id);
1081 mutex_exit(&zp->z_lock);
1082 zfs_znode_dmu_fini(zp);
1083 ZFS_OBJ_HOLD_EXIT(zfsvfs, z_id);
1088 zfs_znode_free(znode_t *zp)
1090 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
1092 vn_invalid(ZTOV(zp));
1094 ASSERT(ZTOV(zp)->v_count == 0);
1096 mutex_enter(&zfsvfs->z_znodes_lock);
1097 POINTER_INVALIDATE(&zp->z_zfsvfs);
1098 list_remove(&zfsvfs->z_all_znodes, zp);
1099 mutex_exit(&zfsvfs->z_znodes_lock);
1101 kmem_cache_free(znode_cache, zp);
1103 VFS_RELE(zfsvfs->z_vfs);
1107 zfs_time_stamper_locked(znode_t *zp, uint_t flag, dmu_tx_t *tx)
1111 ASSERT(MUTEX_HELD(&zp->z_lock));
1116 dmu_buf_will_dirty(zp->z_dbuf, tx);
1117 zp->z_atime_dirty = 0;
1120 zp->z_atime_dirty = 1;
1123 if (flag & AT_ATIME)
1124 ZFS_TIME_ENCODE(&now, zp->z_phys->zp_atime);
1126 if (flag & AT_MTIME) {
1127 ZFS_TIME_ENCODE(&now, zp->z_phys->zp_mtime);
1128 if (zp->z_zfsvfs->z_use_fuids)
1129 zp->z_phys->zp_flags |= (ZFS_ARCHIVE | ZFS_AV_MODIFIED);
1132 if (flag & AT_CTIME) {
1133 ZFS_TIME_ENCODE(&now, zp->z_phys->zp_ctime);
1134 if (zp->z_zfsvfs->z_use_fuids)
1135 zp->z_phys->zp_flags |= ZFS_ARCHIVE;
1140 * Update the requested znode timestamps with the current time.
1141 * If we are in a transaction, then go ahead and mark the znode
1142 * dirty in the transaction so the timestamps will go to disk.
1143 * Otherwise, we will get pushed next time the znode is updated
1144 * in a transaction, or when this znode eventually goes inactive.
1147 * 1 - Only the ACCESS time is ever updated outside of a transaction.
1148 * 2 - Multiple consecutive updates will be collapsed into a single
1149 * znode update by the transaction grouping semantics of the DMU.
1152 zfs_time_stamper(znode_t *zp, uint_t flag, dmu_tx_t *tx)
1154 mutex_enter(&zp->z_lock);
1155 zfs_time_stamper_locked(zp, flag, tx);
1156 mutex_exit(&zp->z_lock);
1160 * Grow the block size for a file.
1162 * IN: zp - znode of file to free data in.
1163 * size - requested block size
1164 * tx - open transaction.
1166 * NOTE: this function assumes that the znode is write locked.
1169 zfs_grow_blocksize(znode_t *zp, uint64_t size, dmu_tx_t *tx)
1174 if (size <= zp->z_blksz)
1177 * If the file size is already greater than the current blocksize,
1178 * we will not grow. If there is more than one block in a file,
1179 * the blocksize cannot change.
1181 if (zp->z_blksz && zp->z_phys->zp_size > zp->z_blksz)
1184 error = dmu_object_set_blocksize(zp->z_zfsvfs->z_os, zp->z_id,
1186 if (error == ENOTSUP)
1188 ASSERT3U(error, ==, 0);
1190 /* What blocksize did we actually get? */
1191 dmu_object_size_from_db(zp->z_dbuf, &zp->z_blksz, &dummy);
1195 * This is a dummy interface used when pvn_vplist_dirty() should *not*
1196 * be calling back into the fs for a putpage(). E.g.: when truncating
1197 * a file, the pages being "thrown away* don't need to be written out.
1201 zfs_no_putpage(vnode_t *vp, page_t *pp, u_offset_t *offp, size_t *lenp,
1202 int flags, cred_t *cr)
1209 * Increase the file length
1211 * IN: zp - znode of file to free data in.
1212 * end - new end-of-file
1214 * RETURN: 0 if success
1215 * error code if failure
1218 zfs_extend(znode_t *zp, uint64_t end)
1220 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
1227 * We will change zp_size, lock the whole file.
1229 rl = zfs_range_lock(zp, 0, UINT64_MAX, RL_WRITER);
1232 * Nothing to do if file already at desired length.
1234 if (end <= zp->z_phys->zp_size) {
1235 zfs_range_unlock(rl);
1239 tx = dmu_tx_create(zfsvfs->z_os);
1240 dmu_tx_hold_bonus(tx, zp->z_id);
1241 if (end > zp->z_blksz &&
1242 (!ISP2(zp->z_blksz) || zp->z_blksz < zfsvfs->z_max_blksz)) {
1244 * We are growing the file past the current block size.
1246 if (zp->z_blksz > zp->z_zfsvfs->z_max_blksz) {
1247 ASSERT(!ISP2(zp->z_blksz));
1248 newblksz = MIN(end, SPA_MAXBLOCKSIZE);
1250 newblksz = MIN(end, zp->z_zfsvfs->z_max_blksz);
1252 dmu_tx_hold_write(tx, zp->z_id, 0, newblksz);
1257 error = dmu_tx_assign(tx, TXG_NOWAIT);
1259 if (error == ERESTART) {
1265 zfs_range_unlock(rl);
1268 dmu_buf_will_dirty(zp->z_dbuf, tx);
1271 zfs_grow_blocksize(zp, newblksz, tx);
1273 zp->z_phys->zp_size = end;
1275 zfs_range_unlock(rl);
1283 * Free space in a file.
1285 * IN: zp - znode of file to free data in.
1286 * off - start of section to free.
1287 * len - length of section to free.
1289 * RETURN: 0 if success
1290 * error code if failure
1293 zfs_free_range(znode_t *zp, uint64_t off, uint64_t len)
1295 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
1300 * Lock the range being freed.
1302 rl = zfs_range_lock(zp, off, len, RL_WRITER);
1305 * Nothing to do if file already at desired length.
1307 if (off >= zp->z_phys->zp_size) {
1308 zfs_range_unlock(rl);
1312 if (off + len > zp->z_phys->zp_size)
1313 len = zp->z_phys->zp_size - off;
1315 error = dmu_free_long_range(zfsvfs->z_os, zp->z_id, off, len);
1317 zfs_range_unlock(rl);
1325 * IN: zp - znode of file to free data in.
1326 * end - new end-of-file.
1328 * RETURN: 0 if success
1329 * error code if failure
1332 zfs_trunc(znode_t *zp, uint64_t end)
1334 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
1335 vnode_t *vp = ZTOV(zp);
1341 * We will change zp_size, lock the whole file.
1343 rl = zfs_range_lock(zp, 0, UINT64_MAX, RL_WRITER);
1346 * Nothing to do if file already at desired length.
1348 if (end >= zp->z_phys->zp_size) {
1349 zfs_range_unlock(rl);
1353 error = dmu_free_long_range(zfsvfs->z_os, zp->z_id, end, -1);
1355 zfs_range_unlock(rl);
1359 tx = dmu_tx_create(zfsvfs->z_os);
1360 dmu_tx_hold_bonus(tx, zp->z_id);
1361 error = dmu_tx_assign(tx, TXG_NOWAIT);
1363 if (error == ERESTART) {
1369 zfs_range_unlock(rl);
1372 dmu_buf_will_dirty(zp->z_dbuf, tx);
1374 zp->z_phys->zp_size = end;
1378 zfs_range_unlock(rl);
1381 * Clear any mapped pages in the truncated region. This has to
1382 * happen outside of the transaction to avoid the possibility of
1383 * a deadlock with someone trying to push a page that we are
1384 * about to invalidate.
1386 rw_enter(&zp->z_map_lock, RW_WRITER);
1387 if (vn_has_cached_data(vp)) {
1389 uint64_t start = end & PAGEMASK;
1390 int poff = end & PAGEOFFSET;
1392 if (poff != 0 && (pp = page_lookup(vp, start, SE_SHARED))) {
1394 * We need to zero a partial page.
1396 pagezero(pp, poff, PAGESIZE - poff);
1400 error = pvn_vplist_dirty(vp, start, zfs_no_putpage,
1401 B_INVAL | B_TRUNC, NULL);
1404 rw_exit(&zp->z_map_lock);
1410 * Free space in a file
1412 * IN: zp - znode of file to free data in.
1413 * off - start of range
1414 * len - end of range (0 => EOF)
1415 * flag - current file open mode flags.
1416 * log - TRUE if this action should be logged
1418 * RETURN: 0 if success
1419 * error code if failure
1422 zfs_freesp(znode_t *zp, uint64_t off, uint64_t len, int flag, boolean_t log)
1424 vnode_t *vp = ZTOV(zp);
1426 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
1427 zilog_t *zilog = zfsvfs->z_log;
1430 if (off > zp->z_phys->zp_size) {
1431 error = zfs_extend(zp, off+len);
1432 if (error == 0 && log)
1439 * Check for any locks in the region to be freed.
1441 if (MANDLOCK(vp, (mode_t)zp->z_phys->zp_mode)) {
1442 uint64_t length = (len ? len : zp->z_phys->zp_size - off);
1443 if (error = chklock(vp, FWRITE, off, length, flag, NULL))
1448 error = zfs_trunc(zp, off);
1450 if ((error = zfs_free_range(zp, off, len)) == 0 &&
1451 off + len > zp->z_phys->zp_size)
1452 error = zfs_extend(zp, off+len);
1457 tx = dmu_tx_create(zfsvfs->z_os);
1458 dmu_tx_hold_bonus(tx, zp->z_id);
1459 error = dmu_tx_assign(tx, TXG_NOWAIT);
1461 if (error == ERESTART) {
1470 zfs_time_stamper(zp, CONTENT_MODIFIED, tx);
1471 zfs_log_truncate(zilog, tx, TX_TRUNCATE, zp, off, len);
1478 zfs_create_fs(objset_t *os, cred_t *cr, nvlist_t *zplprops, dmu_tx_t *tx)
1481 uint64_t moid, doid, version;
1482 uint64_t sense = ZFS_CASE_SENSITIVE;
1486 znode_t *rootzp = NULL;
1492 * First attempt to create master node.
1495 * In an empty objset, there are no blocks to read and thus
1496 * there can be no i/o errors (which we assert below).
1498 moid = MASTER_NODE_OBJ;
1499 error = zap_create_claim(os, moid, DMU_OT_MASTER_NODE,
1500 DMU_OT_NONE, 0, tx);
1504 * Set starting attributes.
1506 if (spa_version(dmu_objset_spa(os)) >= SPA_VERSION_FUID)
1507 version = ZPL_VERSION;
1509 version = ZPL_VERSION_FUID - 1;
1510 error = zap_update(os, moid, ZPL_VERSION_STR,
1511 8, 1, &version, tx);
1513 while ((elem = nvlist_next_nvpair(zplprops, elem)) != NULL) {
1514 /* For the moment we expect all zpl props to be uint64_ts */
1518 ASSERT(nvpair_type(elem) == DATA_TYPE_UINT64);
1519 VERIFY(nvpair_value_uint64(elem, &val) == 0);
1520 name = nvpair_name(elem);
1521 if (strcmp(name, zfs_prop_to_name(ZFS_PROP_VERSION)) == 0) {
1523 error = zap_update(os, moid, ZPL_VERSION_STR,
1524 8, 1, &version, tx);
1526 error = zap_update(os, moid, name, 8, 1, &val, tx);
1529 if (strcmp(name, zfs_prop_to_name(ZFS_PROP_NORMALIZE)) == 0)
1531 else if (strcmp(name, zfs_prop_to_name(ZFS_PROP_CASE)) == 0)
1534 ASSERT(version != 0);
1537 * Create a delete queue.
1539 doid = zap_create(os, DMU_OT_UNLINKED_SET, DMU_OT_NONE, 0, tx);
1541 error = zap_add(os, moid, ZFS_UNLINKED_SET, 8, 1, &doid, tx);
1545 * Create root znode. Create minimal znode/vnode/zfsvfs
1546 * to allow zfs_mknode to work.
1548 vattr.va_mask = AT_MODE|AT_UID|AT_GID|AT_TYPE;
1549 vattr.va_type = VDIR;
1550 vattr.va_mode = S_IFDIR|0755;
1551 vattr.va_uid = crgetuid(cr);
1552 vattr.va_gid = crgetgid(cr);
1554 rootzp = kmem_cache_alloc(znode_cache, KM_SLEEP);
1555 rootzp->z_unlinked = 0;
1556 rootzp->z_atime_dirty = 0;
1562 bzero(&zfsvfs, sizeof (zfsvfs_t));
1565 zfsvfs.z_parent = &zfsvfs;
1566 zfsvfs.z_version = version;
1567 zfsvfs.z_use_fuids = USE_FUIDS(version, os);
1568 zfsvfs.z_norm = norm;
1570 * Fold case on file systems that are always or sometimes case
1573 if (sense == ZFS_CASE_INSENSITIVE || sense == ZFS_CASE_MIXED)
1574 zfsvfs.z_norm |= U8_TEXTPREP_TOUPPER;
1576 mutex_init(&zfsvfs.z_znodes_lock, NULL, MUTEX_DEFAULT, NULL);
1577 list_create(&zfsvfs.z_all_znodes, sizeof (znode_t),
1578 offsetof(znode_t, z_link_node));
1580 ASSERT(!POINTER_IS_VALID(rootzp->z_zfsvfs));
1581 rootzp->z_zfsvfs = &zfsvfs;
1582 zfs_mknode(rootzp, &vattr, tx, cr, IS_ROOT_NODE, &zp, 0, NULL, NULL);
1583 ASSERT3P(zp, ==, rootzp);
1584 ASSERT(!vn_in_dnlc(ZTOV(rootzp))); /* not valid to move */
1585 error = zap_add(os, moid, ZFS_ROOT_OBJ, 8, 1, &rootzp->z_id, tx);
1587 POINTER_INVALIDATE(&rootzp->z_zfsvfs);
1589 ZTOV(rootzp)->v_count = 0;
1590 dmu_buf_rele(rootzp->z_dbuf, NULL);
1591 rootzp->z_dbuf = NULL;
1592 kmem_cache_free(znode_cache, rootzp);
1595 #endif /* _KERNEL */
1597 * Given an object number, return its parent object number and whether
1598 * or not the object is an extended attribute directory.
1601 zfs_obj_to_pobj(objset_t *osp, uint64_t obj, uint64_t *pobjp, int *is_xattrdir)
1604 dmu_object_info_t doi;
1608 if ((error = dmu_bonus_hold(osp, obj, FTAG, &db)) != 0)
1611 dmu_object_info_from_db(db, &doi);
1612 if (doi.doi_bonus_type != DMU_OT_ZNODE ||
1613 doi.doi_bonus_size < sizeof (znode_phys_t)) {
1614 dmu_buf_rele(db, FTAG);
1619 *pobjp = zp->zp_parent;
1620 *is_xattrdir = ((zp->zp_flags & ZFS_XATTR) != 0) &&
1621 S_ISDIR(zp->zp_mode);
1622 dmu_buf_rele(db, FTAG);
1628 zfs_obj_to_path(objset_t *osp, uint64_t obj, char *buf, int len)
1630 char *path = buf + len - 1;
1637 char component[MAXNAMELEN + 2];
1641 if ((error = zfs_obj_to_pobj(osp, obj, &pobj,
1642 &is_xattrdir)) != 0)
1653 (void) sprintf(component + 1, "<xattrdir>");
1655 error = zap_value_search(osp, pobj, obj,
1656 ZFS_DIRENT_OBJ(-1ULL), component + 1);
1661 complen = strlen(component);
1663 ASSERT(path >= buf);
1664 bcopy(component, path, complen);
1669 (void) memmove(buf, path, buf + len - path);