4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
22 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
23 * Copyright (c) 2013 by Delphix. All rights reserved.
26 /* Portions Copyright 2007 Jeremy Teo */
27 /* Portions Copyright 2011 Martin Matuska <mm@FreeBSD.org> */
30 #include <sys/types.h>
31 #include <sys/param.h>
33 #include <sys/systm.h>
34 #include <sys/sysmacros.h>
35 #include <sys/resource.h>
36 #include <sys/mntent.h>
37 #include <sys/u8_textprep.h>
38 #include <sys/dsl_dataset.h>
40 #include <sys/vnode.h>
43 #include <sys/errno.h>
44 #include <sys/unistd.h>
45 #include <sys/atomic.h>
46 #include <sys/zfs_dir.h>
47 #include <sys/zfs_acl.h>
48 #include <sys/zfs_ioctl.h>
49 #include <sys/zfs_rlock.h>
50 #include <sys/zfs_fuid.h>
51 #include <sys/dnode.h>
52 #include <sys/fs/zfs.h>
53 #include <sys/kidmap.h>
57 #include <sys/refcount.h>
60 #include <sys/zfs_znode.h>
62 #include <sys/zfs_sa.h>
63 #include <sys/zfs_stat.h>
64 #include <sys/refcount.h>
67 #include "zfs_comutil.h"
69 /* Used by fstat(1). */
70 SYSCTL_INT(_debug_sizeof, OID_AUTO, znode, CTLFLAG_RD, 0, sizeof(znode_t),
74 * Define ZNODE_STATS to turn on statistic gathering. By default, it is only
75 * turned on when DEBUG is also defined.
82 #define ZNODE_STAT_ADD(stat) ((stat)++)
84 #define ZNODE_STAT_ADD(stat) /* nothing */
85 #endif /* ZNODE_STATS */
88 * Functions needed for userland (ie: libzpool) are not put under
89 * #ifdef_KERNEL; the rest of the functions have dependencies
90 * (such as VFS logic) that will not compile easily in userland.
94 * Needed to close a small window in zfs_znode_move() that allows the zfsvfs to
95 * be freed before it can be safely accessed.
97 krwlock_t zfsvfs_lock;
99 static kmem_cache_t *znode_cache = NULL;
103 znode_evict_error(dmu_buf_t *dbuf, void *user_ptr)
106 * We should never drop all dbuf refs without first clearing
107 * the eviction callback.
109 panic("evicting znode %p\n", user_ptr);
112 extern struct vop_vector zfs_vnodeops;
113 extern struct vop_vector zfs_fifoops;
114 extern struct vop_vector zfs_shareops;
117 * XXX: We cannot use this function as a cache constructor, because
118 * there is one global cache for all file systems and we need
119 * to pass vfsp here, which is not possible, because argument
120 * 'cdrarg' is defined at kmem_cache_create() time.
124 zfs_znode_cache_constructor(void *buf, void *arg, int kmflags)
131 POINTER_INVALIDATE(&zp->z_zfsvfs);
132 ASSERT(!POINTER_IS_VALID(zp->z_zfsvfs));
135 error = getnewvnode("zfs", vfsp, &zfs_vnodeops, &vp);
136 if (error != 0 && (kmflags & KM_NOSLEEP))
139 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
141 vp->v_data = (caddr_t)zp;
148 list_link_init(&zp->z_link_node);
150 mutex_init(&zp->z_lock, NULL, MUTEX_DEFAULT, NULL);
151 rw_init(&zp->z_parent_lock, NULL, RW_DEFAULT, NULL);
152 rw_init(&zp->z_name_lock, NULL, RW_DEFAULT, NULL);
153 mutex_init(&zp->z_acl_lock, NULL, MUTEX_DEFAULT, NULL);
155 mutex_init(&zp->z_range_lock, NULL, MUTEX_DEFAULT, NULL);
156 avl_create(&zp->z_range_avl, zfs_range_compare,
157 sizeof (rl_t), offsetof(rl_t, r_node));
159 zp->z_dirlocks = NULL;
160 zp->z_acl_cached = NULL;
167 zfs_znode_cache_destructor(void *buf, void *arg)
171 ASSERT(!POINTER_IS_VALID(zp->z_zfsvfs));
172 ASSERT(ZTOV(zp) == NULL);
174 ASSERT(!list_link_active(&zp->z_link_node));
175 mutex_destroy(&zp->z_lock);
176 rw_destroy(&zp->z_parent_lock);
177 rw_destroy(&zp->z_name_lock);
178 mutex_destroy(&zp->z_acl_lock);
179 avl_destroy(&zp->z_range_avl);
180 mutex_destroy(&zp->z_range_lock);
182 ASSERT(zp->z_dirlocks == NULL);
183 ASSERT(zp->z_acl_cached == NULL);
188 uint64_t zms_zfsvfs_invalid;
189 uint64_t zms_zfsvfs_recheck1;
190 uint64_t zms_zfsvfs_unmounted;
191 uint64_t zms_zfsvfs_recheck2;
192 uint64_t zms_obj_held;
193 uint64_t zms_vnode_locked;
194 uint64_t zms_not_only_dnlc;
196 #endif /* ZNODE_STATS */
200 zfs_znode_move_impl(znode_t *ozp, znode_t *nzp)
205 nzp->z_zfsvfs = ozp->z_zfsvfs;
209 nzp->z_vnode = ozp->z_vnode;
210 ozp->z_vnode = vp; /* let destructor free the overwritten vnode */
211 ZTOV(ozp)->v_data = ozp;
212 ZTOV(nzp)->v_data = nzp;
214 nzp->z_id = ozp->z_id;
215 ASSERT(ozp->z_dirlocks == NULL); /* znode not in use */
216 ASSERT(avl_numnodes(&ozp->z_range_avl) == 0);
217 nzp->z_unlinked = ozp->z_unlinked;
218 nzp->z_atime_dirty = ozp->z_atime_dirty;
219 nzp->z_zn_prefetch = ozp->z_zn_prefetch;
220 nzp->z_blksz = ozp->z_blksz;
221 nzp->z_seq = ozp->z_seq;
222 nzp->z_mapcnt = ozp->z_mapcnt;
223 nzp->z_gen = ozp->z_gen;
224 nzp->z_sync_cnt = ozp->z_sync_cnt;
225 nzp->z_is_sa = ozp->z_is_sa;
226 nzp->z_sa_hdl = ozp->z_sa_hdl;
227 bcopy(ozp->z_atime, nzp->z_atime, sizeof (uint64_t) * 2);
228 nzp->z_links = ozp->z_links;
229 nzp->z_size = ozp->z_size;
230 nzp->z_pflags = ozp->z_pflags;
231 nzp->z_uid = ozp->z_uid;
232 nzp->z_gid = ozp->z_gid;
233 nzp->z_mode = ozp->z_mode;
236 * Since this is just an idle znode and kmem is already dealing with
237 * memory pressure, release any cached ACL.
239 if (ozp->z_acl_cached) {
240 zfs_acl_free(ozp->z_acl_cached);
241 ozp->z_acl_cached = NULL;
244 sa_set_userp(nzp->z_sa_hdl, nzp);
247 * Invalidate the original znode by clearing fields that provide a
248 * pointer back to the znode. Set the low bit of the vfs pointer to
249 * ensure that zfs_znode_move() recognizes the znode as invalid in any
250 * subsequent callback.
252 ozp->z_sa_hdl = NULL;
253 POINTER_INVALIDATE(&ozp->z_zfsvfs);
259 ozp->z_moved = (uint8_t)-1;
264 zfs_znode_move(void *buf, void *newbuf, size_t size, void *arg)
266 znode_t *ozp = buf, *nzp = newbuf;
271 * The znode is on the file system's list of known znodes if the vfs
272 * pointer is valid. We set the low bit of the vfs pointer when freeing
273 * the znode to invalidate it, and the memory patterns written by kmem
274 * (baddcafe and deadbeef) set at least one of the two low bits. A newly
275 * created znode sets the vfs pointer last of all to indicate that the
276 * znode is known and in a valid state to be moved by this function.
278 zfsvfs = ozp->z_zfsvfs;
279 if (!POINTER_IS_VALID(zfsvfs)) {
280 ZNODE_STAT_ADD(znode_move_stats.zms_zfsvfs_invalid);
281 return (KMEM_CBRC_DONT_KNOW);
285 * Close a small window in which it's possible that the filesystem could
286 * be unmounted and freed, and zfsvfs, though valid in the previous
287 * statement, could point to unrelated memory by the time we try to
288 * prevent the filesystem from being unmounted.
290 rw_enter(&zfsvfs_lock, RW_WRITER);
291 if (zfsvfs != ozp->z_zfsvfs) {
292 rw_exit(&zfsvfs_lock);
293 ZNODE_STAT_ADD(znode_move_stats.zms_zfsvfs_recheck1);
294 return (KMEM_CBRC_DONT_KNOW);
298 * If the znode is still valid, then so is the file system. We know that
299 * no valid file system can be freed while we hold zfsvfs_lock, so we
300 * can safely ensure that the filesystem is not and will not be
301 * unmounted. The next statement is equivalent to ZFS_ENTER().
303 rrw_enter(&zfsvfs->z_teardown_lock, RW_READER, FTAG);
304 if (zfsvfs->z_unmounted) {
306 rw_exit(&zfsvfs_lock);
307 ZNODE_STAT_ADD(znode_move_stats.zms_zfsvfs_unmounted);
308 return (KMEM_CBRC_DONT_KNOW);
310 rw_exit(&zfsvfs_lock);
312 mutex_enter(&zfsvfs->z_znodes_lock);
314 * Recheck the vfs pointer in case the znode was removed just before
315 * acquiring the lock.
317 if (zfsvfs != ozp->z_zfsvfs) {
318 mutex_exit(&zfsvfs->z_znodes_lock);
320 ZNODE_STAT_ADD(znode_move_stats.zms_zfsvfs_recheck2);
321 return (KMEM_CBRC_DONT_KNOW);
325 * At this point we know that as long as we hold z_znodes_lock, the
326 * znode cannot be freed and fields within the znode can be safely
327 * accessed. Now, prevent a race with zfs_zget().
329 if (ZFS_OBJ_HOLD_TRYENTER(zfsvfs, ozp->z_id) == 0) {
330 mutex_exit(&zfsvfs->z_znodes_lock);
332 ZNODE_STAT_ADD(znode_move_stats.zms_obj_held);
333 return (KMEM_CBRC_LATER);
337 if (mutex_tryenter(&vp->v_lock) == 0) {
338 ZFS_OBJ_HOLD_EXIT(zfsvfs, ozp->z_id);
339 mutex_exit(&zfsvfs->z_znodes_lock);
341 ZNODE_STAT_ADD(znode_move_stats.zms_vnode_locked);
342 return (KMEM_CBRC_LATER);
345 /* Only move znodes that are referenced _only_ by the DNLC. */
346 if (vp->v_count != 1 || !vn_in_dnlc(vp)) {
347 mutex_exit(&vp->v_lock);
348 ZFS_OBJ_HOLD_EXIT(zfsvfs, ozp->z_id);
349 mutex_exit(&zfsvfs->z_znodes_lock);
351 ZNODE_STAT_ADD(znode_move_stats.zms_not_only_dnlc);
352 return (KMEM_CBRC_LATER);
356 * The znode is known and in a valid state to move. We're holding the
357 * locks needed to execute the critical section.
359 zfs_znode_move_impl(ozp, nzp);
360 mutex_exit(&vp->v_lock);
361 ZFS_OBJ_HOLD_EXIT(zfsvfs, ozp->z_id);
363 list_link_replace(&ozp->z_link_node, &nzp->z_link_node);
364 mutex_exit(&zfsvfs->z_znodes_lock);
367 return (KMEM_CBRC_YES);
377 rw_init(&zfsvfs_lock, NULL, RW_DEFAULT, NULL);
378 ASSERT(znode_cache == NULL);
379 znode_cache = kmem_cache_create("zfs_znode_cache",
380 sizeof (znode_t), 0, /* zfs_znode_cache_constructor */ NULL,
381 zfs_znode_cache_destructor, NULL, NULL, NULL, 0);
382 kmem_cache_set_move(znode_cache, zfs_znode_move);
390 * Cleanup vfs & vnode ops
392 zfs_remove_op_tables();
399 kmem_cache_destroy(znode_cache);
401 rw_destroy(&zfsvfs_lock);
405 struct vnodeops *zfs_dvnodeops;
406 struct vnodeops *zfs_fvnodeops;
407 struct vnodeops *zfs_symvnodeops;
408 struct vnodeops *zfs_xdvnodeops;
409 struct vnodeops *zfs_evnodeops;
410 struct vnodeops *zfs_sharevnodeops;
413 zfs_remove_op_tables()
419 (void) vfs_freevfsops_by_type(zfsfstype);
426 vn_freevnodeops(zfs_dvnodeops);
428 vn_freevnodeops(zfs_fvnodeops);
430 vn_freevnodeops(zfs_symvnodeops);
432 vn_freevnodeops(zfs_xdvnodeops);
434 vn_freevnodeops(zfs_evnodeops);
435 if (zfs_sharevnodeops)
436 vn_freevnodeops(zfs_sharevnodeops);
438 zfs_dvnodeops = NULL;
439 zfs_fvnodeops = NULL;
440 zfs_symvnodeops = NULL;
441 zfs_xdvnodeops = NULL;
442 zfs_evnodeops = NULL;
443 zfs_sharevnodeops = NULL;
446 extern const fs_operation_def_t zfs_dvnodeops_template[];
447 extern const fs_operation_def_t zfs_fvnodeops_template[];
448 extern const fs_operation_def_t zfs_xdvnodeops_template[];
449 extern const fs_operation_def_t zfs_symvnodeops_template[];
450 extern const fs_operation_def_t zfs_evnodeops_template[];
451 extern const fs_operation_def_t zfs_sharevnodeops_template[];
454 zfs_create_op_tables()
459 * zfs_dvnodeops can be set if mod_remove() calls mod_installfs()
460 * due to a failure to remove the the 2nd modlinkage (zfs_modldrv).
461 * In this case we just return as the ops vectors are already set up.
466 error = vn_make_ops(MNTTYPE_ZFS, zfs_dvnodeops_template,
471 error = vn_make_ops(MNTTYPE_ZFS, zfs_fvnodeops_template,
476 error = vn_make_ops(MNTTYPE_ZFS, zfs_symvnodeops_template,
481 error = vn_make_ops(MNTTYPE_ZFS, zfs_xdvnodeops_template,
486 error = vn_make_ops(MNTTYPE_ZFS, zfs_evnodeops_template,
491 error = vn_make_ops(MNTTYPE_ZFS, zfs_sharevnodeops_template,
499 zfs_create_share_dir(zfsvfs_t *zfsvfs, dmu_tx_t *tx)
501 zfs_acl_ids_t acl_ids;
508 vattr.va_mask = AT_MODE|AT_UID|AT_GID|AT_TYPE;
509 vattr.va_type = VDIR;
510 vattr.va_mode = S_IFDIR|0555;
511 vattr.va_uid = crgetuid(kcred);
512 vattr.va_gid = crgetgid(kcred);
514 sharezp = kmem_cache_alloc(znode_cache, KM_SLEEP);
515 zfs_znode_cache_constructor(sharezp, zfsvfs->z_parent->z_vfs, 0);
516 ASSERT(!POINTER_IS_VALID(sharezp->z_zfsvfs));
517 sharezp->z_moved = 0;
518 sharezp->z_unlinked = 0;
519 sharezp->z_atime_dirty = 0;
520 sharezp->z_zfsvfs = zfsvfs;
521 sharezp->z_is_sa = zfsvfs->z_use_sa;
523 sharezp->z_vnode = &vnode;
524 vnode.v_data = sharezp;
529 VERIFY(0 == zfs_acl_ids_create(sharezp, IS_ROOT_NODE, &vattr,
530 kcred, NULL, &acl_ids));
531 zfs_mknode(sharezp, &vattr, tx, kcred, IS_ROOT_NODE, &zp, &acl_ids);
532 ASSERT3P(zp, ==, sharezp);
533 POINTER_INVALIDATE(&sharezp->z_zfsvfs);
534 error = zap_add(zfsvfs->z_os, MASTER_NODE_OBJ,
535 ZFS_SHARES_DIR, 8, 1, &sharezp->z_id, tx);
536 zfsvfs->z_shares_dir = sharezp->z_id;
538 zfs_acl_ids_free(&acl_ids);
539 ZTOV(sharezp)->v_data = NULL;
540 ZTOV(sharezp)->v_count = 0;
541 ZTOV(sharezp)->v_holdcnt = 0;
543 sa_handle_destroy(sharezp->z_sa_hdl);
544 sharezp->z_vnode = NULL;
545 kmem_cache_free(znode_cache, sharezp);
551 * define a couple of values we need available
552 * for both 64 and 32 bit environments.
555 #define NBITSMINOR64 32
558 #define MAXMAJ64 0xffffffffUL
561 #define MAXMIN64 0xffffffffUL
565 * Create special expldev for ZFS private use.
566 * Can't use standard expldev since it doesn't do
567 * what we want. The standard expldev() takes a
568 * dev32_t in LP64 and expands it to a long dev_t.
569 * We need an interface that takes a dev32_t in ILP32
570 * and expands it to a long dev_t.
573 zfs_expldev(dev_t dev)
575 return (((uint64_t)major(dev) << NBITSMINOR64) | minor(dev));
578 * Special cmpldev for ZFS private use.
579 * Can't use standard cmpldev since it takes
580 * a long dev_t and compresses it to dev32_t in
581 * LP64. We need to do a compaction of a long dev_t
582 * to a dev32_t in ILP32.
585 zfs_cmpldev(uint64_t dev)
587 return (makedev((dev >> NBITSMINOR64), (dev & MAXMIN64)));
591 zfs_znode_sa_init(zfsvfs_t *zfsvfs, znode_t *zp,
592 dmu_buf_t *db, dmu_object_type_t obj_type, sa_handle_t *sa_hdl)
594 ASSERT(!POINTER_IS_VALID(zp->z_zfsvfs) || (zfsvfs == zp->z_zfsvfs));
595 ASSERT(MUTEX_HELD(ZFS_OBJ_MUTEX(zfsvfs, zp->z_id)));
597 mutex_enter(&zp->z_lock);
599 ASSERT(zp->z_sa_hdl == NULL);
600 ASSERT(zp->z_acl_cached == NULL);
601 if (sa_hdl == NULL) {
602 VERIFY(0 == sa_handle_get_from_db(zfsvfs->z_os, db, zp,
603 SA_HDL_SHARED, &zp->z_sa_hdl));
605 zp->z_sa_hdl = sa_hdl;
606 sa_set_userp(sa_hdl, zp);
609 zp->z_is_sa = (obj_type == DMU_OT_SA) ? B_TRUE : B_FALSE;
612 * Slap on VROOT if we are the root znode
614 if (zp->z_id == zfsvfs->z_root)
615 ZTOV(zp)->v_flag |= VROOT;
617 mutex_exit(&zp->z_lock);
622 zfs_znode_dmu_fini(znode_t *zp)
624 ASSERT(MUTEX_HELD(ZFS_OBJ_MUTEX(zp->z_zfsvfs, zp->z_id)) ||
626 RW_WRITE_HELD(&zp->z_zfsvfs->z_teardown_inactive_lock));
628 sa_handle_destroy(zp->z_sa_hdl);
633 zfs_vnode_forget(vnode_t *vp)
636 /* copied from insmntque_stddtr */
638 vp->v_op = &dead_vnodeops;
644 * Construct a new znode/vnode and intialize.
646 * This does not do a call to dmu_set_user() that is
647 * up to the caller to do, in case you don't want to
651 zfs_znode_alloc(zfsvfs_t *zfsvfs, dmu_buf_t *db, int blksz,
652 dmu_object_type_t obj_type, sa_handle_t *hdl)
658 sa_bulk_attr_t bulk[9];
661 zp = kmem_cache_alloc(znode_cache, KM_SLEEP);
662 zfs_znode_cache_constructor(zp, zfsvfs->z_parent->z_vfs, 0);
664 ASSERT(zp->z_dirlocks == NULL);
665 ASSERT(!POINTER_IS_VALID(zp->z_zfsvfs));
669 * Defer setting z_zfsvfs until the znode is ready to be a candidate for
670 * the zfs_znode_move() callback.
674 zp->z_atime_dirty = 0;
676 zp->z_id = db->db_object;
678 zp->z_seq = 0x7A4653;
683 zfs_znode_sa_init(zfsvfs, zp, db, obj_type, hdl);
685 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MODE(zfsvfs), NULL, &mode, 8);
686 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_GEN(zfsvfs), NULL, &zp->z_gen, 8);
687 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_SIZE(zfsvfs), NULL,
689 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_LINKS(zfsvfs), NULL,
691 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_FLAGS(zfsvfs), NULL,
693 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_PARENT(zfsvfs), NULL, &parent, 8);
694 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_ATIME(zfsvfs), NULL,
696 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_UID(zfsvfs), NULL,
698 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_GID(zfsvfs), NULL,
701 if (sa_bulk_lookup(zp->z_sa_hdl, bulk, count) != 0 || zp->z_gen == 0) {
703 sa_handle_destroy(zp->z_sa_hdl);
704 zfs_vnode_forget(vp);
706 kmem_cache_free(znode_cache, zp);
712 vp->v_type = IFTOVT((mode_t)mode);
714 switch (vp->v_type) {
716 zp->z_zn_prefetch = B_TRUE; /* z_prefetch default is enabled */
723 VERIFY(sa_lookup(zp->z_sa_hdl, SA_ZPL_RDEV(zfsvfs),
724 &rdev, sizeof (rdev)) == 0);
726 vp->v_rdev = zfs_cmpldev(rdev);
735 vp->v_op = &zfs_fifoops;
738 if (parent == zfsvfs->z_shares_dir) {
739 ASSERT(zp->z_uid == 0 && zp->z_gid == 0);
740 vp->v_op = &zfs_shareops;
745 vn_setops(vp, zfs_symvnodeops);
748 vn_setops(vp, zfs_evnodeops);
752 if (vp->v_type != VFIFO)
755 mutex_enter(&zfsvfs->z_znodes_lock);
756 list_insert_tail(&zfsvfs->z_all_znodes, zp);
759 * Everything else must be valid before assigning z_zfsvfs makes the
760 * znode eligible for zfs_znode_move().
762 zp->z_zfsvfs = zfsvfs;
763 mutex_exit(&zfsvfs->z_znodes_lock);
765 VFS_HOLD(zfsvfs->z_vfs);
769 static uint64_t empty_xattr;
770 static uint64_t pad[4];
771 static zfs_acl_phys_t acl_phys;
773 * Create a new DMU object to hold a zfs znode.
775 * IN: dzp - parent directory for new znode
776 * vap - file attributes for new znode
777 * tx - dmu transaction id for zap operations
778 * cr - credentials of caller
780 * IS_ROOT_NODE - new object will be root
781 * IS_XATTR - new object is an attribute
782 * bonuslen - length of bonus buffer
783 * setaclp - File/Dir initial ACL
784 * fuidp - Tracks fuid allocation.
786 * OUT: zpp - allocated znode
790 zfs_mknode(znode_t *dzp, vattr_t *vap, dmu_tx_t *tx, cred_t *cr,
791 uint_t flag, znode_t **zpp, zfs_acl_ids_t *acl_ids)
793 uint64_t crtime[2], atime[2], mtime[2], ctime[2];
794 uint64_t mode, size, links, parent, pflags;
795 uint64_t dzp_pflags = 0;
797 zfsvfs_t *zfsvfs = dzp->z_zfsvfs;
804 dmu_object_type_t obj_type;
805 sa_bulk_attr_t sa_attrs[ZPL_END];
807 zfs_acl_locator_cb_t locate = { 0 };
809 ASSERT(vap && (vap->va_mask & (AT_TYPE|AT_MODE)) == (AT_TYPE|AT_MODE));
811 if (zfsvfs->z_replay) {
812 obj = vap->va_nodeid;
813 now = vap->va_ctime; /* see zfs_replay_create() */
814 gen = vap->va_nblocks; /* ditto */
818 gen = dmu_tx_get_txg(tx);
821 obj_type = zfsvfs->z_use_sa ? DMU_OT_SA : DMU_OT_ZNODE;
822 bonuslen = (obj_type == DMU_OT_SA) ?
823 DN_MAX_BONUSLEN : ZFS_OLD_ZNODE_PHYS_SIZE;
826 * Create a new DMU object.
829 * There's currently no mechanism for pre-reading the blocks that will
830 * be needed to allocate a new object, so we accept the small chance
831 * that there will be an i/o error and we will fail one of the
834 if (vap->va_type == VDIR) {
835 if (zfsvfs->z_replay) {
836 err = zap_create_claim_norm(zfsvfs->z_os, obj,
837 zfsvfs->z_norm, DMU_OT_DIRECTORY_CONTENTS,
838 obj_type, bonuslen, tx);
841 obj = zap_create_norm(zfsvfs->z_os,
842 zfsvfs->z_norm, DMU_OT_DIRECTORY_CONTENTS,
843 obj_type, bonuslen, tx);
846 if (zfsvfs->z_replay) {
847 err = dmu_object_claim(zfsvfs->z_os, obj,
848 DMU_OT_PLAIN_FILE_CONTENTS, 0,
849 obj_type, bonuslen, tx);
852 obj = dmu_object_alloc(zfsvfs->z_os,
853 DMU_OT_PLAIN_FILE_CONTENTS, 0,
854 obj_type, bonuslen, tx);
858 getnewvnode_reserve(1);
859 ZFS_OBJ_HOLD_ENTER(zfsvfs, obj);
860 VERIFY(0 == sa_buf_hold(zfsvfs->z_os, obj, NULL, &db));
863 * If this is the root, fix up the half-initialized parent pointer
864 * to reference the just-allocated physical data area.
866 if (flag & IS_ROOT_NODE) {
869 dzp_pflags = dzp->z_pflags;
873 * If parent is an xattr, so am I.
875 if (dzp_pflags & ZFS_XATTR) {
879 if (zfsvfs->z_use_fuids)
880 pflags = ZFS_ARCHIVE | ZFS_AV_MODIFIED;
884 if (vap->va_type == VDIR) {
885 size = 2; /* contents ("." and "..") */
886 links = (flag & (IS_ROOT_NODE | IS_XATTR)) ? 2 : 1;
891 if (vap->va_type == VBLK || vap->va_type == VCHR) {
892 rdev = zfs_expldev(vap->va_rdev);
896 mode = acl_ids->z_mode;
901 * No execs denied will be deterimed when zfs_mode_compute() is called.
903 pflags |= acl_ids->z_aclp->z_hints &
904 (ZFS_ACL_TRIVIAL|ZFS_INHERIT_ACE|ZFS_ACL_AUTO_INHERIT|
905 ZFS_ACL_DEFAULTED|ZFS_ACL_PROTECTED);
907 ZFS_TIME_ENCODE(&now, crtime);
908 ZFS_TIME_ENCODE(&now, ctime);
910 if (vap->va_mask & AT_ATIME) {
911 ZFS_TIME_ENCODE(&vap->va_atime, atime);
913 ZFS_TIME_ENCODE(&now, atime);
916 if (vap->va_mask & AT_MTIME) {
917 ZFS_TIME_ENCODE(&vap->va_mtime, mtime);
919 ZFS_TIME_ENCODE(&now, mtime);
922 /* Now add in all of the "SA" attributes */
923 VERIFY(0 == sa_handle_get_from_db(zfsvfs->z_os, db, NULL, SA_HDL_SHARED,
927 * Setup the array of attributes to be replaced/set on the new file
929 * order for DMU_OT_ZNODE is critical since it needs to be constructed
930 * in the old znode_phys_t format. Don't change this ordering
933 if (obj_type == DMU_OT_ZNODE) {
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),
942 SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_GEN(zfsvfs),
944 SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_MODE(zfsvfs),
946 SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_SIZE(zfsvfs),
948 SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_PARENT(zfsvfs),
951 SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_MODE(zfsvfs),
953 SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_SIZE(zfsvfs),
955 SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_GEN(zfsvfs),
957 SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_UID(zfsvfs), NULL,
958 &acl_ids->z_fuid, 8);
959 SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_GID(zfsvfs), NULL,
960 &acl_ids->z_fgid, 8);
961 SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_PARENT(zfsvfs),
963 SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_FLAGS(zfsvfs),
965 SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_ATIME(zfsvfs),
967 SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_MTIME(zfsvfs),
969 SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_CTIME(zfsvfs),
971 SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_CRTIME(zfsvfs),
975 SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_LINKS(zfsvfs), NULL, &links, 8);
977 if (obj_type == DMU_OT_ZNODE) {
978 SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_XATTR(zfsvfs), NULL,
981 if (obj_type == DMU_OT_ZNODE ||
982 (vap->va_type == VBLK || vap->va_type == VCHR)) {
983 SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_RDEV(zfsvfs),
987 if (obj_type == DMU_OT_ZNODE) {
988 SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_FLAGS(zfsvfs),
990 SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_UID(zfsvfs), NULL,
991 &acl_ids->z_fuid, 8);
992 SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_GID(zfsvfs), NULL,
993 &acl_ids->z_fgid, 8);
994 SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_PAD(zfsvfs), NULL, pad,
995 sizeof (uint64_t) * 4);
996 SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_ZNODE_ACL(zfsvfs), NULL,
997 &acl_phys, sizeof (zfs_acl_phys_t));
998 } else if (acl_ids->z_aclp->z_version >= ZFS_ACL_VERSION_FUID) {
999 SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_DACL_COUNT(zfsvfs), NULL,
1000 &acl_ids->z_aclp->z_acl_count, 8);
1001 locate.cb_aclp = acl_ids->z_aclp;
1002 SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_DACL_ACES(zfsvfs),
1003 zfs_acl_data_locator, &locate,
1004 acl_ids->z_aclp->z_acl_bytes);
1005 mode = zfs_mode_compute(mode, acl_ids->z_aclp, &pflags,
1006 acl_ids->z_fuid, acl_ids->z_fgid);
1009 VERIFY(sa_replace_all_by_template(sa_hdl, sa_attrs, cnt, tx) == 0);
1011 if (!(flag & IS_ROOT_NODE)) {
1012 *zpp = zfs_znode_alloc(zfsvfs, db, 0, obj_type, sa_hdl);
1013 ASSERT(*zpp != NULL);
1016 * If we are creating the root node, the "parent" we
1017 * passed in is the znode for the root.
1021 (*zpp)->z_sa_hdl = sa_hdl;
1024 (*zpp)->z_pflags = pflags;
1025 (*zpp)->z_mode = mode;
1027 if (vap->va_mask & AT_XVATTR)
1028 zfs_xvattr_set(*zpp, (xvattr_t *)vap, tx);
1030 if (obj_type == DMU_OT_ZNODE ||
1031 acl_ids->z_aclp->z_version < ZFS_ACL_VERSION_FUID) {
1032 err = zfs_aclset_common(*zpp, acl_ids->z_aclp, cr, tx);
1035 if (!(flag & IS_ROOT_NODE)) {
1039 vp->v_vflag |= VV_FORCEINSMQ;
1040 err = insmntque(vp, zfsvfs->z_vfs);
1041 vp->v_vflag &= ~VV_FORCEINSMQ;
1042 KASSERT(err == 0, ("insmntque() failed: error %d", err));
1044 ZFS_OBJ_HOLD_EXIT(zfsvfs, obj);
1045 getnewvnode_drop_reserve();
1049 * Update in-core attributes. It is assumed the caller will be doing an
1050 * sa_bulk_update to push the changes out.
1053 zfs_xvattr_set(znode_t *zp, xvattr_t *xvap, dmu_tx_t *tx)
1057 xoap = xva_getxoptattr(xvap);
1060 if (XVA_ISSET_REQ(xvap, XAT_CREATETIME)) {
1062 ZFS_TIME_ENCODE(&xoap->xoa_createtime, times);
1063 (void) sa_update(zp->z_sa_hdl, SA_ZPL_CRTIME(zp->z_zfsvfs),
1064 ×, sizeof (times), tx);
1065 XVA_SET_RTN(xvap, XAT_CREATETIME);
1067 if (XVA_ISSET_REQ(xvap, XAT_READONLY)) {
1068 ZFS_ATTR_SET(zp, ZFS_READONLY, xoap->xoa_readonly,
1070 XVA_SET_RTN(xvap, XAT_READONLY);
1072 if (XVA_ISSET_REQ(xvap, XAT_HIDDEN)) {
1073 ZFS_ATTR_SET(zp, ZFS_HIDDEN, xoap->xoa_hidden,
1075 XVA_SET_RTN(xvap, XAT_HIDDEN);
1077 if (XVA_ISSET_REQ(xvap, XAT_SYSTEM)) {
1078 ZFS_ATTR_SET(zp, ZFS_SYSTEM, xoap->xoa_system,
1080 XVA_SET_RTN(xvap, XAT_SYSTEM);
1082 if (XVA_ISSET_REQ(xvap, XAT_ARCHIVE)) {
1083 ZFS_ATTR_SET(zp, ZFS_ARCHIVE, xoap->xoa_archive,
1085 XVA_SET_RTN(xvap, XAT_ARCHIVE);
1087 if (XVA_ISSET_REQ(xvap, XAT_IMMUTABLE)) {
1088 ZFS_ATTR_SET(zp, ZFS_IMMUTABLE, xoap->xoa_immutable,
1090 XVA_SET_RTN(xvap, XAT_IMMUTABLE);
1092 if (XVA_ISSET_REQ(xvap, XAT_NOUNLINK)) {
1093 ZFS_ATTR_SET(zp, ZFS_NOUNLINK, xoap->xoa_nounlink,
1095 XVA_SET_RTN(xvap, XAT_NOUNLINK);
1097 if (XVA_ISSET_REQ(xvap, XAT_APPENDONLY)) {
1098 ZFS_ATTR_SET(zp, ZFS_APPENDONLY, xoap->xoa_appendonly,
1100 XVA_SET_RTN(xvap, XAT_APPENDONLY);
1102 if (XVA_ISSET_REQ(xvap, XAT_NODUMP)) {
1103 ZFS_ATTR_SET(zp, ZFS_NODUMP, xoap->xoa_nodump,
1105 XVA_SET_RTN(xvap, XAT_NODUMP);
1107 if (XVA_ISSET_REQ(xvap, XAT_OPAQUE)) {
1108 ZFS_ATTR_SET(zp, ZFS_OPAQUE, xoap->xoa_opaque,
1110 XVA_SET_RTN(xvap, XAT_OPAQUE);
1112 if (XVA_ISSET_REQ(xvap, XAT_AV_QUARANTINED)) {
1113 ZFS_ATTR_SET(zp, ZFS_AV_QUARANTINED,
1114 xoap->xoa_av_quarantined, zp->z_pflags, tx);
1115 XVA_SET_RTN(xvap, XAT_AV_QUARANTINED);
1117 if (XVA_ISSET_REQ(xvap, XAT_AV_MODIFIED)) {
1118 ZFS_ATTR_SET(zp, ZFS_AV_MODIFIED, xoap->xoa_av_modified,
1120 XVA_SET_RTN(xvap, XAT_AV_MODIFIED);
1122 if (XVA_ISSET_REQ(xvap, XAT_AV_SCANSTAMP)) {
1123 zfs_sa_set_scanstamp(zp, xvap, tx);
1124 XVA_SET_RTN(xvap, XAT_AV_SCANSTAMP);
1126 if (XVA_ISSET_REQ(xvap, XAT_REPARSE)) {
1127 ZFS_ATTR_SET(zp, ZFS_REPARSE, xoap->xoa_reparse,
1129 XVA_SET_RTN(xvap, XAT_REPARSE);
1131 if (XVA_ISSET_REQ(xvap, XAT_OFFLINE)) {
1132 ZFS_ATTR_SET(zp, ZFS_OFFLINE, xoap->xoa_offline,
1134 XVA_SET_RTN(xvap, XAT_OFFLINE);
1136 if (XVA_ISSET_REQ(xvap, XAT_SPARSE)) {
1137 ZFS_ATTR_SET(zp, ZFS_SPARSE, xoap->xoa_sparse,
1139 XVA_SET_RTN(xvap, XAT_SPARSE);
1144 zfs_zget(zfsvfs_t *zfsvfs, uint64_t obj_num, znode_t **zpp)
1146 dmu_object_info_t doi;
1156 getnewvnode_reserve(1);
1159 ZFS_OBJ_HOLD_ENTER(zfsvfs, obj_num);
1161 err = sa_buf_hold(zfsvfs->z_os, obj_num, NULL, &db);
1163 ZFS_OBJ_HOLD_EXIT(zfsvfs, obj_num);
1164 getnewvnode_drop_reserve();
1168 dmu_object_info_from_db(db, &doi);
1169 if (doi.doi_bonus_type != DMU_OT_SA &&
1170 (doi.doi_bonus_type != DMU_OT_ZNODE ||
1171 (doi.doi_bonus_type == DMU_OT_ZNODE &&
1172 doi.doi_bonus_size < sizeof (znode_phys_t)))) {
1173 sa_buf_rele(db, NULL);
1174 ZFS_OBJ_HOLD_EXIT(zfsvfs, obj_num);
1176 getnewvnode_drop_reserve();
1178 return (SET_ERROR(EINVAL));
1181 hdl = dmu_buf_get_user(db);
1183 zp = sa_get_userdata(hdl);
1187 * Since "SA" does immediate eviction we
1188 * should never find a sa handle that doesn't
1189 * know about the znode.
1192 ASSERT3P(zp, !=, NULL);
1194 mutex_enter(&zp->z_lock);
1195 ASSERT3U(zp->z_id, ==, obj_num);
1196 if (zp->z_unlinked) {
1197 err = SET_ERROR(ENOENT);
1203 sa_buf_rele(db, NULL);
1205 /* Don't let the vnode disappear after ZFS_OBJ_HOLD_EXIT. */
1209 mutex_exit(&zp->z_lock);
1210 ZFS_OBJ_HOLD_EXIT(zfsvfs, obj_num);
1213 locked = VOP_ISLOCKED(vp);
1215 if ((vp->v_iflag & VI_DOOMED) != 0 &&
1216 locked != LK_EXCLUSIVE) {
1218 * The vnode is doomed and this thread doesn't
1219 * hold the exclusive lock on it, so the vnode
1220 * must be being reclaimed by another thread.
1221 * Otherwise the doomed vnode is being reclaimed
1222 * by this thread and zfs_zget is called from
1231 getnewvnode_drop_reserve();
1236 * Not found create new znode/vnode
1237 * but only if file exists.
1239 * There is a small window where zfs_vget() could
1240 * find this object while a file create is still in
1241 * progress. This is checked for in zfs_znode_alloc()
1243 * if zfs_znode_alloc() fails it will drop the hold on the
1246 zp = zfs_znode_alloc(zfsvfs, db, doi.doi_data_block_size,
1247 doi.doi_bonus_type, NULL);
1249 err = SET_ERROR(ENOENT);
1254 vnode_t *vp = ZTOV(zp);
1256 err = insmntque(vp, zfsvfs->z_vfs);
1261 zfs_znode_dmu_fini(zp);
1266 ZFS_OBJ_HOLD_EXIT(zfsvfs, obj_num);
1267 getnewvnode_drop_reserve();
1272 zfs_rezget(znode_t *zp)
1274 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
1275 dmu_object_info_t doi;
1278 uint64_t obj_num = zp->z_id;
1279 uint64_t mode, size;
1280 sa_bulk_attr_t bulk[8];
1285 ZFS_OBJ_HOLD_ENTER(zfsvfs, obj_num);
1287 mutex_enter(&zp->z_acl_lock);
1288 if (zp->z_acl_cached) {
1289 zfs_acl_free(zp->z_acl_cached);
1290 zp->z_acl_cached = NULL;
1293 mutex_exit(&zp->z_acl_lock);
1294 ASSERT(zp->z_sa_hdl == NULL);
1295 err = sa_buf_hold(zfsvfs->z_os, obj_num, NULL, &db);
1297 ZFS_OBJ_HOLD_EXIT(zfsvfs, obj_num);
1301 dmu_object_info_from_db(db, &doi);
1302 if (doi.doi_bonus_type != DMU_OT_SA &&
1303 (doi.doi_bonus_type != DMU_OT_ZNODE ||
1304 (doi.doi_bonus_type == DMU_OT_ZNODE &&
1305 doi.doi_bonus_size < sizeof (znode_phys_t)))) {
1306 sa_buf_rele(db, NULL);
1307 ZFS_OBJ_HOLD_EXIT(zfsvfs, obj_num);
1308 return (SET_ERROR(EINVAL));
1311 zfs_znode_sa_init(zfsvfs, zp, db, doi.doi_bonus_type, NULL);
1314 /* reload cached values */
1315 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_GEN(zfsvfs), NULL,
1316 &gen, sizeof (gen));
1317 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_SIZE(zfsvfs), NULL,
1318 &zp->z_size, sizeof (zp->z_size));
1319 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_LINKS(zfsvfs), NULL,
1320 &zp->z_links, sizeof (zp->z_links));
1321 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_FLAGS(zfsvfs), NULL,
1322 &zp->z_pflags, sizeof (zp->z_pflags));
1323 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_ATIME(zfsvfs), NULL,
1324 &zp->z_atime, sizeof (zp->z_atime));
1325 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_UID(zfsvfs), NULL,
1326 &zp->z_uid, sizeof (zp->z_uid));
1327 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_GID(zfsvfs), NULL,
1328 &zp->z_gid, sizeof (zp->z_gid));
1329 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MODE(zfsvfs), NULL,
1330 &mode, sizeof (mode));
1332 if (sa_bulk_lookup(zp->z_sa_hdl, bulk, count)) {
1333 zfs_znode_dmu_fini(zp);
1334 ZFS_OBJ_HOLD_EXIT(zfsvfs, obj_num);
1335 return (SET_ERROR(EIO));
1340 if (gen != zp->z_gen) {
1341 zfs_znode_dmu_fini(zp);
1342 ZFS_OBJ_HOLD_EXIT(zfsvfs, obj_num);
1343 return (SET_ERROR(EIO));
1347 * XXXPJD: Not sure how is that possible, but under heavy
1348 * zfs recv -F load it happens that z_gen is the same, but
1349 * vnode type is different than znode type. This would mean
1350 * that for example regular file was replaced with directory
1351 * which has the same object number.
1355 vp->v_type != IFTOVT((mode_t)zp->z_mode)) {
1356 zfs_znode_dmu_fini(zp);
1357 ZFS_OBJ_HOLD_EXIT(zfsvfs, obj_num);
1361 zp->z_unlinked = (zp->z_links == 0);
1362 zp->z_blksz = doi.doi_data_block_size;
1364 vn_pages_remove(vp, 0, 0);
1365 if (zp->z_size != size)
1366 vnode_pager_setsize(vp, zp->z_size);
1369 ZFS_OBJ_HOLD_EXIT(zfsvfs, obj_num);
1375 zfs_znode_delete(znode_t *zp, dmu_tx_t *tx)
1377 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
1378 objset_t *os = zfsvfs->z_os;
1379 uint64_t obj = zp->z_id;
1380 uint64_t acl_obj = zfs_external_acl(zp);
1382 ZFS_OBJ_HOLD_ENTER(zfsvfs, obj);
1384 VERIFY(!zp->z_is_sa);
1385 VERIFY(0 == dmu_object_free(os, acl_obj, tx));
1387 VERIFY(0 == dmu_object_free(os, obj, tx));
1388 zfs_znode_dmu_fini(zp);
1389 ZFS_OBJ_HOLD_EXIT(zfsvfs, obj);
1394 zfs_zinactive(znode_t *zp)
1396 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
1397 uint64_t z_id = zp->z_id;
1399 ASSERT(zp->z_sa_hdl);
1402 * Don't allow a zfs_zget() while were trying to release this znode
1404 ZFS_OBJ_HOLD_ENTER(zfsvfs, z_id);
1406 mutex_enter(&zp->z_lock);
1409 * If this was the last reference to a file with no links,
1410 * remove the file from the file system.
1412 if (zp->z_unlinked) {
1413 mutex_exit(&zp->z_lock);
1414 ZFS_OBJ_HOLD_EXIT(zfsvfs, z_id);
1419 mutex_exit(&zp->z_lock);
1420 zfs_znode_dmu_fini(zp);
1421 ZFS_OBJ_HOLD_EXIT(zfsvfs, z_id);
1426 zfs_znode_free(znode_t *zp)
1428 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
1430 ASSERT(zp->z_sa_hdl == NULL);
1432 mutex_enter(&zfsvfs->z_znodes_lock);
1433 POINTER_INVALIDATE(&zp->z_zfsvfs);
1434 list_remove(&zfsvfs->z_all_znodes, zp);
1435 mutex_exit(&zfsvfs->z_znodes_lock);
1437 if (zp->z_acl_cached) {
1438 zfs_acl_free(zp->z_acl_cached);
1439 zp->z_acl_cached = NULL;
1442 kmem_cache_free(znode_cache, zp);
1444 VFS_RELE(zfsvfs->z_vfs);
1448 zfs_tstamp_update_setup(znode_t *zp, uint_t flag, uint64_t mtime[2],
1449 uint64_t ctime[2], boolean_t have_tx)
1455 if (have_tx) { /* will sa_bulk_update happen really soon? */
1456 zp->z_atime_dirty = 0;
1459 zp->z_atime_dirty = 1;
1462 if (flag & AT_ATIME) {
1463 ZFS_TIME_ENCODE(&now, zp->z_atime);
1466 if (flag & AT_MTIME) {
1467 ZFS_TIME_ENCODE(&now, mtime);
1468 if (zp->z_zfsvfs->z_use_fuids) {
1469 zp->z_pflags |= (ZFS_ARCHIVE |
1474 if (flag & AT_CTIME) {
1475 ZFS_TIME_ENCODE(&now, ctime);
1476 if (zp->z_zfsvfs->z_use_fuids)
1477 zp->z_pflags |= ZFS_ARCHIVE;
1482 * Grow the block size for a file.
1484 * IN: zp - znode of file to free data in.
1485 * size - requested block size
1486 * tx - open transaction.
1488 * NOTE: this function assumes that the znode is write locked.
1491 zfs_grow_blocksize(znode_t *zp, uint64_t size, dmu_tx_t *tx)
1496 if (size <= zp->z_blksz)
1499 * If the file size is already greater than the current blocksize,
1500 * we will not grow. If there is more than one block in a file,
1501 * the blocksize cannot change.
1503 if (zp->z_blksz && zp->z_size > zp->z_blksz)
1506 error = dmu_object_set_blocksize(zp->z_zfsvfs->z_os, zp->z_id,
1509 if (error == ENOTSUP)
1513 /* What blocksize did we actually get? */
1514 dmu_object_size_from_db(sa_get_db(zp->z_sa_hdl), &zp->z_blksz, &dummy);
1519 * This is a dummy interface used when pvn_vplist_dirty() should *not*
1520 * be calling back into the fs for a putpage(). E.g.: when truncating
1521 * a file, the pages being "thrown away* don't need to be written out.
1525 zfs_no_putpage(vnode_t *vp, page_t *pp, u_offset_t *offp, size_t *lenp,
1526 int flags, cred_t *cr)
1534 * Increase the file length
1536 * IN: zp - znode of file to free data in.
1537 * end - new end-of-file
1539 * RETURN: 0 on success, error code on failure
1542 zfs_extend(znode_t *zp, uint64_t end)
1544 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
1551 * We will change zp_size, lock the whole file.
1553 rl = zfs_range_lock(zp, 0, UINT64_MAX, RL_WRITER);
1556 * Nothing to do if file already at desired length.
1558 if (end <= zp->z_size) {
1559 zfs_range_unlock(rl);
1563 tx = dmu_tx_create(zfsvfs->z_os);
1564 dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_FALSE);
1565 zfs_sa_upgrade_txholds(tx, zp);
1566 if (end > zp->z_blksz &&
1567 (!ISP2(zp->z_blksz) || zp->z_blksz < zfsvfs->z_max_blksz)) {
1569 * We are growing the file past the current block size.
1571 if (zp->z_blksz > zp->z_zfsvfs->z_max_blksz) {
1572 ASSERT(!ISP2(zp->z_blksz));
1573 newblksz = MIN(end, SPA_MAXBLOCKSIZE);
1575 newblksz = MIN(end, zp->z_zfsvfs->z_max_blksz);
1577 dmu_tx_hold_write(tx, zp->z_id, 0, newblksz);
1582 error = dmu_tx_assign(tx, TXG_NOWAIT);
1584 if (error == ERESTART) {
1590 zfs_range_unlock(rl);
1595 zfs_grow_blocksize(zp, newblksz, tx);
1599 VERIFY(0 == sa_update(zp->z_sa_hdl, SA_ZPL_SIZE(zp->z_zfsvfs),
1600 &zp->z_size, sizeof (zp->z_size), tx));
1602 vnode_pager_setsize(ZTOV(zp), end);
1604 zfs_range_unlock(rl);
1612 * Free space in a file.
1614 * IN: zp - znode of file to free data in.
1615 * off - start of section to free.
1616 * len - length of section to free.
1618 * RETURN: 0 on success, error code on failure
1621 zfs_free_range(znode_t *zp, uint64_t off, uint64_t len)
1623 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
1628 * Lock the range being freed.
1630 rl = zfs_range_lock(zp, off, len, RL_WRITER);
1633 * Nothing to do if file already at desired length.
1635 if (off >= zp->z_size) {
1636 zfs_range_unlock(rl);
1640 if (off + len > zp->z_size)
1641 len = zp->z_size - off;
1643 error = dmu_free_long_range(zfsvfs->z_os, zp->z_id, off, len);
1647 * In FreeBSD we cannot free block in the middle of a file,
1648 * but only at the end of a file, so this code path should
1651 vnode_pager_setsize(ZTOV(zp), off);
1654 zfs_range_unlock(rl);
1662 * IN: zp - znode of file to free data in.
1663 * end - new end-of-file.
1665 * RETURN: 0 on success, error code on failure
1668 zfs_trunc(znode_t *zp, uint64_t end)
1670 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
1671 vnode_t *vp = ZTOV(zp);
1675 sa_bulk_attr_t bulk[2];
1679 * We will change zp_size, lock the whole file.
1681 rl = zfs_range_lock(zp, 0, UINT64_MAX, RL_WRITER);
1684 * Nothing to do if file already at desired length.
1686 if (end >= zp->z_size) {
1687 zfs_range_unlock(rl);
1691 error = dmu_free_long_range(zfsvfs->z_os, zp->z_id, end, -1);
1693 zfs_range_unlock(rl);
1697 tx = dmu_tx_create(zfsvfs->z_os);
1698 dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_FALSE);
1699 zfs_sa_upgrade_txholds(tx, zp);
1700 error = dmu_tx_assign(tx, TXG_NOWAIT);
1702 if (error == ERESTART) {
1708 zfs_range_unlock(rl);
1713 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_SIZE(zfsvfs),
1714 NULL, &zp->z_size, sizeof (zp->z_size));
1717 zp->z_pflags &= ~ZFS_SPARSE;
1718 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_FLAGS(zfsvfs),
1719 NULL, &zp->z_pflags, 8);
1721 VERIFY(sa_bulk_update(zp->z_sa_hdl, bulk, count, tx) == 0);
1726 * Clear any mapped pages in the truncated region. This has to
1727 * happen outside of the transaction to avoid the possibility of
1728 * a deadlock with someone trying to push a page that we are
1729 * about to invalidate.
1731 vnode_pager_setsize(vp, end);
1733 zfs_range_unlock(rl);
1739 * Free space in a file
1741 * IN: zp - znode of file to free data in.
1742 * off - start of range
1743 * len - end of range (0 => EOF)
1744 * flag - current file open mode flags.
1745 * log - TRUE if this action should be logged
1747 * RETURN: 0 on success, error code on failure
1750 zfs_freesp(znode_t *zp, uint64_t off, uint64_t len, int flag, boolean_t log)
1752 vnode_t *vp = ZTOV(zp);
1754 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
1755 zilog_t *zilog = zfsvfs->z_log;
1757 uint64_t mtime[2], ctime[2];
1758 sa_bulk_attr_t bulk[3];
1762 if ((error = sa_lookup(zp->z_sa_hdl, SA_ZPL_MODE(zfsvfs), &mode,
1763 sizeof (mode))) != 0)
1766 if (off > zp->z_size) {
1767 error = zfs_extend(zp, off+len);
1768 if (error == 0 && log)
1775 * Check for any locks in the region to be freed.
1778 if (MANDLOCK(vp, (mode_t)mode)) {
1779 uint64_t length = (len ? len : zp->z_size - off);
1780 if (error = chklock(vp, FWRITE, off, length, flag, NULL))
1785 error = zfs_trunc(zp, off);
1787 if ((error = zfs_free_range(zp, off, len)) == 0 &&
1788 off + len > zp->z_size)
1789 error = zfs_extend(zp, off+len);
1794 tx = dmu_tx_create(zfsvfs->z_os);
1795 dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_FALSE);
1796 zfs_sa_upgrade_txholds(tx, zp);
1797 error = dmu_tx_assign(tx, TXG_NOWAIT);
1799 if (error == ERESTART) {
1808 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MTIME(zfsvfs), NULL, mtime, 16);
1809 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_CTIME(zfsvfs), NULL, ctime, 16);
1810 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_FLAGS(zfsvfs),
1811 NULL, &zp->z_pflags, 8);
1812 zfs_tstamp_update_setup(zp, CONTENT_MODIFIED, mtime, ctime, B_TRUE);
1813 error = sa_bulk_update(zp->z_sa_hdl, bulk, count, tx);
1816 zfs_log_truncate(zilog, tx, TX_TRUNCATE, zp, off, len);
1823 zfs_create_fs(objset_t *os, cred_t *cr, nvlist_t *zplprops, dmu_tx_t *tx)
1826 uint64_t moid, obj, sa_obj, version;
1827 uint64_t sense = ZFS_CASE_SENSITIVE;
1832 znode_t *rootzp = NULL;
1836 zfs_acl_ids_t acl_ids;
1839 * First attempt to create master node.
1842 * In an empty objset, there are no blocks to read and thus
1843 * there can be no i/o errors (which we assert below).
1845 moid = MASTER_NODE_OBJ;
1846 error = zap_create_claim(os, moid, DMU_OT_MASTER_NODE,
1847 DMU_OT_NONE, 0, tx);
1851 * Set starting attributes.
1853 version = zfs_zpl_version_map(spa_version(dmu_objset_spa(os)));
1855 while ((elem = nvlist_next_nvpair(zplprops, elem)) != NULL) {
1856 /* For the moment we expect all zpl props to be uint64_ts */
1860 ASSERT(nvpair_type(elem) == DATA_TYPE_UINT64);
1861 VERIFY(nvpair_value_uint64(elem, &val) == 0);
1862 name = nvpair_name(elem);
1863 if (strcmp(name, zfs_prop_to_name(ZFS_PROP_VERSION)) == 0) {
1867 error = zap_update(os, moid, name, 8, 1, &val, tx);
1870 if (strcmp(name, zfs_prop_to_name(ZFS_PROP_NORMALIZE)) == 0)
1872 else if (strcmp(name, zfs_prop_to_name(ZFS_PROP_CASE)) == 0)
1875 ASSERT(version != 0);
1876 error = zap_update(os, moid, ZPL_VERSION_STR, 8, 1, &version, tx);
1879 * Create zap object used for SA attribute registration
1882 if (version >= ZPL_VERSION_SA) {
1883 sa_obj = zap_create(os, DMU_OT_SA_MASTER_NODE,
1884 DMU_OT_NONE, 0, tx);
1885 error = zap_add(os, moid, ZFS_SA_ATTRS, 8, 1, &sa_obj, tx);
1891 * Create a delete queue.
1893 obj = zap_create(os, DMU_OT_UNLINKED_SET, DMU_OT_NONE, 0, tx);
1895 error = zap_add(os, moid, ZFS_UNLINKED_SET, 8, 1, &obj, tx);
1899 * Create root znode. Create minimal znode/vnode/zfsvfs
1900 * to allow zfs_mknode to work.
1903 vattr.va_mask = AT_MODE|AT_UID|AT_GID|AT_TYPE;
1904 vattr.va_type = VDIR;
1905 vattr.va_mode = S_IFDIR|0755;
1906 vattr.va_uid = crgetuid(cr);
1907 vattr.va_gid = crgetgid(cr);
1909 bzero(&zfsvfs, sizeof (zfsvfs_t));
1911 rootzp = kmem_cache_alloc(znode_cache, KM_SLEEP);
1912 zfs_znode_cache_constructor(rootzp, NULL, 0);
1913 ASSERT(!POINTER_IS_VALID(rootzp->z_zfsvfs));
1914 rootzp->z_moved = 0;
1915 rootzp->z_unlinked = 0;
1916 rootzp->z_atime_dirty = 0;
1917 rootzp->z_is_sa = USE_SA(version, os);
1919 vnode.v_type = VDIR;
1920 vnode.v_data = rootzp;
1921 rootzp->z_vnode = &vnode;
1924 zfsvfs.z_parent = &zfsvfs;
1925 zfsvfs.z_version = version;
1926 zfsvfs.z_use_fuids = USE_FUIDS(version, os);
1927 zfsvfs.z_use_sa = USE_SA(version, os);
1928 zfsvfs.z_norm = norm;
1930 error = sa_setup(os, sa_obj, zfs_attr_table, ZPL_END,
1931 &zfsvfs.z_attr_table);
1936 * Fold case on file systems that are always or sometimes case
1939 if (sense == ZFS_CASE_INSENSITIVE || sense == ZFS_CASE_MIXED)
1940 zfsvfs.z_norm |= U8_TEXTPREP_TOUPPER;
1942 mutex_init(&zfsvfs.z_znodes_lock, NULL, MUTEX_DEFAULT, NULL);
1943 list_create(&zfsvfs.z_all_znodes, sizeof (znode_t),
1944 offsetof(znode_t, z_link_node));
1946 for (i = 0; i != ZFS_OBJ_MTX_SZ; i++)
1947 mutex_init(&zfsvfs.z_hold_mtx[i], NULL, MUTEX_DEFAULT, NULL);
1949 rootzp->z_zfsvfs = &zfsvfs;
1950 VERIFY(0 == zfs_acl_ids_create(rootzp, IS_ROOT_NODE, &vattr,
1951 cr, NULL, &acl_ids));
1952 zfs_mknode(rootzp, &vattr, tx, cr, IS_ROOT_NODE, &zp, &acl_ids);
1953 ASSERT3P(zp, ==, rootzp);
1954 error = zap_add(os, moid, ZFS_ROOT_OBJ, 8, 1, &rootzp->z_id, tx);
1956 zfs_acl_ids_free(&acl_ids);
1957 POINTER_INVALIDATE(&rootzp->z_zfsvfs);
1959 sa_handle_destroy(rootzp->z_sa_hdl);
1960 rootzp->z_vnode = NULL;
1961 kmem_cache_free(znode_cache, rootzp);
1964 * Create shares directory
1967 error = zfs_create_share_dir(&zfsvfs, tx);
1971 for (i = 0; i != ZFS_OBJ_MTX_SZ; i++)
1972 mutex_destroy(&zfsvfs.z_hold_mtx[i]);
1975 #endif /* _KERNEL */
1978 zfs_sa_setup(objset_t *osp, sa_attr_type_t **sa_table)
1980 uint64_t sa_obj = 0;
1983 error = zap_lookup(osp, MASTER_NODE_OBJ, ZFS_SA_ATTRS, 8, 1, &sa_obj);
1984 if (error != 0 && error != ENOENT)
1987 error = sa_setup(osp, sa_obj, zfs_attr_table, ZPL_END, sa_table);
1992 zfs_grab_sa_handle(objset_t *osp, uint64_t obj, sa_handle_t **hdlp,
1993 dmu_buf_t **db, void *tag)
1995 dmu_object_info_t doi;
1998 if ((error = sa_buf_hold(osp, obj, tag, db)) != 0)
2001 dmu_object_info_from_db(*db, &doi);
2002 if ((doi.doi_bonus_type != DMU_OT_SA &&
2003 doi.doi_bonus_type != DMU_OT_ZNODE) ||
2004 doi.doi_bonus_type == DMU_OT_ZNODE &&
2005 doi.doi_bonus_size < sizeof (znode_phys_t)) {
2006 sa_buf_rele(*db, tag);
2007 return (SET_ERROR(ENOTSUP));
2010 error = sa_handle_get(osp, obj, NULL, SA_HDL_PRIVATE, hdlp);
2012 sa_buf_rele(*db, tag);
2020 zfs_release_sa_handle(sa_handle_t *hdl, dmu_buf_t *db, void *tag)
2022 sa_handle_destroy(hdl);
2023 sa_buf_rele(db, tag);
2027 * Given an object number, return its parent object number and whether
2028 * or not the object is an extended attribute directory.
2031 zfs_obj_to_pobj(objset_t *osp, sa_handle_t *hdl, sa_attr_type_t *sa_table,
2032 uint64_t *pobjp, int *is_xattrdir)
2037 uint64_t parent_mode;
2038 sa_bulk_attr_t bulk[3];
2039 sa_handle_t *sa_hdl;
2044 SA_ADD_BULK_ATTR(bulk, count, sa_table[ZPL_PARENT], NULL,
2045 &parent, sizeof (parent));
2046 SA_ADD_BULK_ATTR(bulk, count, sa_table[ZPL_FLAGS], NULL,
2047 &pflags, sizeof (pflags));
2048 SA_ADD_BULK_ATTR(bulk, count, sa_table[ZPL_MODE], NULL,
2049 &mode, sizeof (mode));
2051 if ((error = sa_bulk_lookup(hdl, bulk, count)) != 0)
2055 * When a link is removed its parent pointer is not changed and will
2056 * be invalid. There are two cases where a link is removed but the
2057 * file stays around, when it goes to the delete queue and when there
2058 * are additional links.
2060 error = zfs_grab_sa_handle(osp, parent, &sa_hdl, &sa_db, FTAG);
2064 error = sa_lookup(sa_hdl, ZPL_MODE, &parent_mode, sizeof (parent_mode));
2065 zfs_release_sa_handle(sa_hdl, sa_db, FTAG);
2069 *is_xattrdir = ((pflags & ZFS_XATTR) != 0) && S_ISDIR(mode);
2072 * Extended attributes can be applied to files, directories, etc.
2073 * Otherwise the parent must be a directory.
2075 if (!*is_xattrdir && !S_ISDIR(parent_mode))
2076 return (SET_ERROR(EINVAL));
2084 * Given an object number, return some zpl level statistics
2087 zfs_obj_to_stats_impl(sa_handle_t *hdl, sa_attr_type_t *sa_table,
2090 sa_bulk_attr_t bulk[4];
2093 SA_ADD_BULK_ATTR(bulk, count, sa_table[ZPL_MODE], NULL,
2094 &sb->zs_mode, sizeof (sb->zs_mode));
2095 SA_ADD_BULK_ATTR(bulk, count, sa_table[ZPL_GEN], NULL,
2096 &sb->zs_gen, sizeof (sb->zs_gen));
2097 SA_ADD_BULK_ATTR(bulk, count, sa_table[ZPL_LINKS], NULL,
2098 &sb->zs_links, sizeof (sb->zs_links));
2099 SA_ADD_BULK_ATTR(bulk, count, sa_table[ZPL_CTIME], NULL,
2100 &sb->zs_ctime, sizeof (sb->zs_ctime));
2102 return (sa_bulk_lookup(hdl, bulk, count));
2106 zfs_obj_to_path_impl(objset_t *osp, uint64_t obj, sa_handle_t *hdl,
2107 sa_attr_type_t *sa_table, char *buf, int len)
2109 sa_handle_t *sa_hdl;
2110 sa_handle_t *prevhdl = NULL;
2111 dmu_buf_t *prevdb = NULL;
2112 dmu_buf_t *sa_db = NULL;
2113 char *path = buf + len - 1;
2121 char component[MAXNAMELEN + 2];
2126 zfs_release_sa_handle(prevhdl, prevdb, FTAG);
2128 if ((error = zfs_obj_to_pobj(osp, sa_hdl, sa_table, &pobj,
2129 &is_xattrdir)) != 0)
2140 (void) sprintf(component + 1, "<xattrdir>");
2142 error = zap_value_search(osp, pobj, obj,
2143 ZFS_DIRENT_OBJ(-1ULL), component + 1);
2148 complen = strlen(component);
2150 ASSERT(path >= buf);
2151 bcopy(component, path, complen);
2154 if (sa_hdl != hdl) {
2158 error = zfs_grab_sa_handle(osp, obj, &sa_hdl, &sa_db, FTAG);
2166 if (sa_hdl != NULL && sa_hdl != hdl) {
2167 ASSERT(sa_db != NULL);
2168 zfs_release_sa_handle(sa_hdl, sa_db, FTAG);
2172 (void) memmove(buf, path, buf + len - path);
2178 zfs_obj_to_path(objset_t *osp, uint64_t obj, char *buf, int len)
2180 sa_attr_type_t *sa_table;
2185 error = zfs_sa_setup(osp, &sa_table);
2189 error = zfs_grab_sa_handle(osp, obj, &hdl, &db, FTAG);
2193 error = zfs_obj_to_path_impl(osp, obj, hdl, sa_table, buf, len);
2195 zfs_release_sa_handle(hdl, db, FTAG);
2200 zfs_obj_to_stats(objset_t *osp, uint64_t obj, zfs_stat_t *sb,
2203 char *path = buf + len - 1;
2204 sa_attr_type_t *sa_table;
2211 error = zfs_sa_setup(osp, &sa_table);
2215 error = zfs_grab_sa_handle(osp, obj, &hdl, &db, FTAG);
2219 error = zfs_obj_to_stats_impl(hdl, sa_table, sb);
2221 zfs_release_sa_handle(hdl, db, FTAG);
2225 error = zfs_obj_to_path_impl(osp, obj, hdl, sa_table, buf, len);
2227 zfs_release_sa_handle(hdl, db, FTAG);