4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
22 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
25 /* Portions Copyright 2007 Jeremy Teo */
28 #include <sys/types.h>
29 #include <sys/param.h>
31 #include <sys/systm.h>
32 #include <sys/sysmacros.h>
33 #include <sys/resource.h>
34 #include <sys/mntent.h>
35 #include <sys/mkdev.h>
36 #include <sys/u8_textprep.h>
37 #include <sys/dsl_dataset.h>
39 #include <sys/vfs_opreg.h>
40 #include <sys/vnode.h>
43 #include <sys/errno.h>
44 #include <sys/unistd.h>
46 #include <sys/atomic.h>
48 #include "fs/fs_subr.h"
49 #include <sys/zfs_dir.h>
50 #include <sys/zfs_acl.h>
51 #include <sys/zfs_ioctl.h>
52 #include <sys/zfs_rlock.h>
53 #include <sys/zfs_fuid.h>
54 #include <sys/dnode.h>
55 #include <sys/fs/zfs.h>
56 #include <sys/kidmap.h>
60 #include <sys/refcount.h>
63 #include <sys/zfs_znode.h>
65 #include <sys/zfs_sa.h>
68 #include "zfs_comutil.h"
71 * Define ZNODE_STATS to turn on statistic gathering. By default, it is only
72 * turned on when DEBUG is also defined.
79 #define ZNODE_STAT_ADD(stat) ((stat)++)
81 #define ZNODE_STAT_ADD(stat) /* nothing */
82 #endif /* ZNODE_STATS */
84 #define POINTER_IS_VALID(p) (!((uintptr_t)(p) & 0x3))
85 #define POINTER_INVALIDATE(pp) (*(pp) = (void *)((uintptr_t)(*(pp)) | 0x1))
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);
114 zfs_znode_cache_constructor(void *buf, void *arg, int kmflags)
118 ASSERT(!POINTER_IS_VALID(zp->z_zfsvfs));
120 zp->z_vnode = vn_alloc(kmflags);
121 if (zp->z_vnode == NULL) {
124 ZTOV(zp)->v_data = zp;
126 list_link_init(&zp->z_link_node);
128 mutex_init(&zp->z_lock, NULL, MUTEX_DEFAULT, NULL);
129 rw_init(&zp->z_parent_lock, NULL, RW_DEFAULT, NULL);
130 rw_init(&zp->z_name_lock, NULL, RW_DEFAULT, NULL);
131 mutex_init(&zp->z_acl_lock, NULL, MUTEX_DEFAULT, NULL);
133 mutex_init(&zp->z_range_lock, NULL, MUTEX_DEFAULT, NULL);
134 avl_create(&zp->z_range_avl, zfs_range_compare,
135 sizeof (rl_t), offsetof(rl_t, r_node));
137 zp->z_dirlocks = NULL;
138 zp->z_acl_cached = NULL;
144 zfs_znode_cache_destructor(void *buf, void *arg)
148 ASSERT(!POINTER_IS_VALID(zp->z_zfsvfs));
149 ASSERT(ZTOV(zp)->v_data == zp);
151 ASSERT(!list_link_active(&zp->z_link_node));
152 mutex_destroy(&zp->z_lock);
153 rw_destroy(&zp->z_parent_lock);
154 rw_destroy(&zp->z_name_lock);
155 mutex_destroy(&zp->z_acl_lock);
156 avl_destroy(&zp->z_range_avl);
157 mutex_destroy(&zp->z_range_lock);
159 ASSERT(zp->z_dirlocks == NULL);
160 ASSERT(zp->z_acl_cached == NULL);
165 uint64_t zms_zfsvfs_invalid;
166 uint64_t zms_zfsvfs_recheck1;
167 uint64_t zms_zfsvfs_unmounted;
168 uint64_t zms_zfsvfs_recheck2;
169 uint64_t zms_obj_held;
170 uint64_t zms_vnode_locked;
171 uint64_t zms_not_only_dnlc;
173 #endif /* ZNODE_STATS */
176 zfs_znode_move_impl(znode_t *ozp, znode_t *nzp)
181 nzp->z_zfsvfs = ozp->z_zfsvfs;
185 nzp->z_vnode = ozp->z_vnode;
186 ozp->z_vnode = vp; /* let destructor free the overwritten vnode */
187 ZTOV(ozp)->v_data = ozp;
188 ZTOV(nzp)->v_data = nzp;
190 nzp->z_id = ozp->z_id;
191 ASSERT(ozp->z_dirlocks == NULL); /* znode not in use */
192 ASSERT(avl_numnodes(&ozp->z_range_avl) == 0);
193 nzp->z_unlinked = ozp->z_unlinked;
194 nzp->z_atime_dirty = ozp->z_atime_dirty;
195 nzp->z_zn_prefetch = ozp->z_zn_prefetch;
196 nzp->z_blksz = ozp->z_blksz;
197 nzp->z_seq = ozp->z_seq;
198 nzp->z_mapcnt = ozp->z_mapcnt;
199 nzp->z_last_itx = ozp->z_last_itx;
200 nzp->z_gen = ozp->z_gen;
201 nzp->z_sync_cnt = ozp->z_sync_cnt;
202 nzp->z_is_sa = ozp->z_is_sa;
203 nzp->z_sa_hdl = ozp->z_sa_hdl;
204 bcopy(ozp->z_atime, nzp->z_atime, sizeof (uint64_t) * 2);
205 nzp->z_links = ozp->z_links;
206 nzp->z_size = ozp->z_size;
207 nzp->z_pflags = ozp->z_pflags;
208 nzp->z_uid = ozp->z_uid;
209 nzp->z_gid = ozp->z_gid;
210 nzp->z_mode = ozp->z_mode;
213 * Since this is just an idle znode and kmem is already dealing with
214 * memory pressure, release any cached ACL.
216 if (ozp->z_acl_cached) {
217 zfs_acl_free(ozp->z_acl_cached);
218 ozp->z_acl_cached = NULL;
221 sa_set_userp(nzp->z_sa_hdl, nzp);
224 * Invalidate the original znode by clearing fields that provide a
225 * pointer back to the znode. Set the low bit of the vfs pointer to
226 * ensure that zfs_znode_move() recognizes the znode as invalid in any
227 * subsequent callback.
229 ozp->z_sa_hdl = NULL;
230 POINTER_INVALIDATE(&ozp->z_zfsvfs);
235 zfs_znode_move(void *buf, void *newbuf, size_t size, void *arg)
237 znode_t *ozp = buf, *nzp = newbuf;
242 * The znode is on the file system's list of known znodes if the vfs
243 * pointer is valid. We set the low bit of the vfs pointer when freeing
244 * the znode to invalidate it, and the memory patterns written by kmem
245 * (baddcafe and deadbeef) set at least one of the two low bits. A newly
246 * created znode sets the vfs pointer last of all to indicate that the
247 * znode is known and in a valid state to be moved by this function.
249 zfsvfs = ozp->z_zfsvfs;
250 if (!POINTER_IS_VALID(zfsvfs)) {
251 ZNODE_STAT_ADD(znode_move_stats.zms_zfsvfs_invalid);
252 return (KMEM_CBRC_DONT_KNOW);
256 * Close a small window in which it's possible that the filesystem could
257 * be unmounted and freed, and zfsvfs, though valid in the previous
258 * statement, could point to unrelated memory by the time we try to
259 * prevent the filesystem from being unmounted.
261 rw_enter(&zfsvfs_lock, RW_WRITER);
262 if (zfsvfs != ozp->z_zfsvfs) {
263 rw_exit(&zfsvfs_lock);
264 ZNODE_STAT_ADD(znode_move_stats.zms_zfsvfs_recheck1);
265 return (KMEM_CBRC_DONT_KNOW);
269 * If the znode is still valid, then so is the file system. We know that
270 * no valid file system can be freed while we hold zfsvfs_lock, so we
271 * can safely ensure that the filesystem is not and will not be
272 * unmounted. The next statement is equivalent to ZFS_ENTER().
274 rrw_enter(&zfsvfs->z_teardown_lock, RW_READER, FTAG);
275 if (zfsvfs->z_unmounted) {
277 rw_exit(&zfsvfs_lock);
278 ZNODE_STAT_ADD(znode_move_stats.zms_zfsvfs_unmounted);
279 return (KMEM_CBRC_DONT_KNOW);
281 rw_exit(&zfsvfs_lock);
283 mutex_enter(&zfsvfs->z_znodes_lock);
285 * Recheck the vfs pointer in case the znode was removed just before
286 * acquiring the lock.
288 if (zfsvfs != ozp->z_zfsvfs) {
289 mutex_exit(&zfsvfs->z_znodes_lock);
291 ZNODE_STAT_ADD(znode_move_stats.zms_zfsvfs_recheck2);
292 return (KMEM_CBRC_DONT_KNOW);
296 * At this point we know that as long as we hold z_znodes_lock, the
297 * znode cannot be freed and fields within the znode can be safely
298 * accessed. Now, prevent a race with zfs_zget().
300 if (ZFS_OBJ_HOLD_TRYENTER(zfsvfs, ozp->z_id) == 0) {
301 mutex_exit(&zfsvfs->z_znodes_lock);
303 ZNODE_STAT_ADD(znode_move_stats.zms_obj_held);
304 return (KMEM_CBRC_LATER);
308 if (mutex_tryenter(&vp->v_lock) == 0) {
309 ZFS_OBJ_HOLD_EXIT(zfsvfs, ozp->z_id);
310 mutex_exit(&zfsvfs->z_znodes_lock);
312 ZNODE_STAT_ADD(znode_move_stats.zms_vnode_locked);
313 return (KMEM_CBRC_LATER);
316 /* Only move znodes that are referenced _only_ by the DNLC. */
317 if (vp->v_count != 1 || !vn_in_dnlc(vp)) {
318 mutex_exit(&vp->v_lock);
319 ZFS_OBJ_HOLD_EXIT(zfsvfs, ozp->z_id);
320 mutex_exit(&zfsvfs->z_znodes_lock);
322 ZNODE_STAT_ADD(znode_move_stats.zms_not_only_dnlc);
323 return (KMEM_CBRC_LATER);
327 * The znode is known and in a valid state to move. We're holding the
328 * locks needed to execute the critical section.
330 zfs_znode_move_impl(ozp, nzp);
331 mutex_exit(&vp->v_lock);
332 ZFS_OBJ_HOLD_EXIT(zfsvfs, ozp->z_id);
334 list_link_replace(&ozp->z_link_node, &nzp->z_link_node);
335 mutex_exit(&zfsvfs->z_znodes_lock);
338 return (KMEM_CBRC_YES);
347 rw_init(&zfsvfs_lock, NULL, RW_DEFAULT, NULL);
348 ASSERT(znode_cache == NULL);
349 znode_cache = kmem_cache_create("zfs_znode_cache",
350 sizeof (znode_t), 0, zfs_znode_cache_constructor,
351 zfs_znode_cache_destructor, NULL, NULL, NULL, 0);
352 kmem_cache_set_move(znode_cache, zfs_znode_move);
359 * Cleanup vfs & vnode ops
361 zfs_remove_op_tables();
367 kmem_cache_destroy(znode_cache);
369 rw_destroy(&zfsvfs_lock);
372 struct vnodeops *zfs_dvnodeops;
373 struct vnodeops *zfs_fvnodeops;
374 struct vnodeops *zfs_symvnodeops;
375 struct vnodeops *zfs_xdvnodeops;
376 struct vnodeops *zfs_evnodeops;
377 struct vnodeops *zfs_sharevnodeops;
380 zfs_remove_op_tables()
386 (void) vfs_freevfsops_by_type(zfsfstype);
393 vn_freevnodeops(zfs_dvnodeops);
395 vn_freevnodeops(zfs_fvnodeops);
397 vn_freevnodeops(zfs_symvnodeops);
399 vn_freevnodeops(zfs_xdvnodeops);
401 vn_freevnodeops(zfs_evnodeops);
402 if (zfs_sharevnodeops)
403 vn_freevnodeops(zfs_sharevnodeops);
405 zfs_dvnodeops = NULL;
406 zfs_fvnodeops = NULL;
407 zfs_symvnodeops = NULL;
408 zfs_xdvnodeops = NULL;
409 zfs_evnodeops = NULL;
410 zfs_sharevnodeops = NULL;
413 extern const fs_operation_def_t zfs_dvnodeops_template[];
414 extern const fs_operation_def_t zfs_fvnodeops_template[];
415 extern const fs_operation_def_t zfs_xdvnodeops_template[];
416 extern const fs_operation_def_t zfs_symvnodeops_template[];
417 extern const fs_operation_def_t zfs_evnodeops_template[];
418 extern const fs_operation_def_t zfs_sharevnodeops_template[];
421 zfs_create_op_tables()
426 * zfs_dvnodeops can be set if mod_remove() calls mod_installfs()
427 * due to a failure to remove the the 2nd modlinkage (zfs_modldrv).
428 * In this case we just return as the ops vectors are already set up.
433 error = vn_make_ops(MNTTYPE_ZFS, zfs_dvnodeops_template,
438 error = vn_make_ops(MNTTYPE_ZFS, zfs_fvnodeops_template,
443 error = vn_make_ops(MNTTYPE_ZFS, zfs_symvnodeops_template,
448 error = vn_make_ops(MNTTYPE_ZFS, zfs_xdvnodeops_template,
453 error = vn_make_ops(MNTTYPE_ZFS, zfs_evnodeops_template,
458 error = vn_make_ops(MNTTYPE_ZFS, zfs_sharevnodeops_template,
465 zfs_create_share_dir(zfsvfs_t *zfsvfs, dmu_tx_t *tx)
467 zfs_acl_ids_t acl_ids;
474 vattr.va_mask = AT_MODE|AT_UID|AT_GID|AT_TYPE;
475 vattr.va_type = VDIR;
476 vattr.va_mode = S_IFDIR|0555;
477 vattr.va_uid = crgetuid(kcred);
478 vattr.va_gid = crgetgid(kcred);
480 sharezp = kmem_cache_alloc(znode_cache, KM_SLEEP);
481 sharezp->z_unlinked = 0;
482 sharezp->z_atime_dirty = 0;
483 sharezp->z_zfsvfs = zfsvfs;
484 sharezp->z_is_sa = zfsvfs->z_use_sa;
490 VERIFY(0 == zfs_acl_ids_create(sharezp, IS_ROOT_NODE, &vattr,
491 kcred, NULL, &acl_ids));
492 zfs_mknode(sharezp, &vattr, tx, kcred, IS_ROOT_NODE, &zp, &acl_ids);
493 ASSERT3P(zp, ==, sharezp);
494 ASSERT(!vn_in_dnlc(ZTOV(sharezp))); /* not valid to move */
495 POINTER_INVALIDATE(&sharezp->z_zfsvfs);
496 error = zap_add(zfsvfs->z_os, MASTER_NODE_OBJ,
497 ZFS_SHARES_DIR, 8, 1, &sharezp->z_id, tx);
498 zfsvfs->z_shares_dir = sharezp->z_id;
500 zfs_acl_ids_free(&acl_ids);
501 ZTOV(sharezp)->v_count = 0;
502 sa_handle_destroy(sharezp->z_sa_hdl);
503 kmem_cache_free(znode_cache, sharezp);
509 * define a couple of values we need available
510 * for both 64 and 32 bit environments.
513 #define NBITSMINOR64 32
516 #define MAXMAJ64 0xffffffffUL
519 #define MAXMIN64 0xffffffffUL
523 * Create special expldev for ZFS private use.
524 * Can't use standard expldev since it doesn't do
525 * what we want. The standard expldev() takes a
526 * dev32_t in LP64 and expands it to a long dev_t.
527 * We need an interface that takes a dev32_t in ILP32
528 * and expands it to a long dev_t.
531 zfs_expldev(dev_t dev)
534 major_t major = (major_t)dev >> NBITSMINOR32 & MAXMAJ32;
535 return (((uint64_t)major << NBITSMINOR64) |
536 ((minor_t)dev & MAXMIN32));
543 * Special cmpldev for ZFS private use.
544 * Can't use standard cmpldev since it takes
545 * a long dev_t and compresses it to dev32_t in
546 * LP64. We need to do a compaction of a long dev_t
547 * to a dev32_t in ILP32.
550 zfs_cmpldev(uint64_t dev)
553 minor_t minor = (minor_t)dev & MAXMIN64;
554 major_t major = (major_t)(dev >> NBITSMINOR64) & MAXMAJ64;
556 if (major > MAXMAJ32 || minor > MAXMIN32)
559 return (((dev32_t)major << NBITSMINOR32) | minor);
566 zfs_znode_sa_init(zfsvfs_t *zfsvfs, znode_t *zp,
567 dmu_buf_t *db, dmu_object_type_t obj_type, sa_handle_t *sa_hdl)
569 ASSERT(!POINTER_IS_VALID(zp->z_zfsvfs) || (zfsvfs == zp->z_zfsvfs));
570 ASSERT(MUTEX_HELD(ZFS_OBJ_MUTEX(zfsvfs, zp->z_id)));
572 mutex_enter(&zp->z_lock);
574 ASSERT(zp->z_sa_hdl == NULL);
575 ASSERT(zp->z_acl_cached == NULL);
576 if (sa_hdl == NULL) {
577 VERIFY(0 == sa_handle_get_from_db(zfsvfs->z_os, db, zp,
578 SA_HDL_SHARED, &zp->z_sa_hdl));
580 zp->z_sa_hdl = sa_hdl;
581 sa_set_userp(sa_hdl, zp);
584 zp->z_is_sa = (obj_type == DMU_OT_SA) ? B_TRUE : B_FALSE;
587 * Slap on VROOT if we are the root znode
589 if (zp->z_id == zfsvfs->z_root)
590 ZTOV(zp)->v_flag |= VROOT;
592 mutex_exit(&zp->z_lock);
597 zfs_znode_dmu_fini(znode_t *zp)
599 ASSERT(MUTEX_HELD(ZFS_OBJ_MUTEX(zp->z_zfsvfs, zp->z_id)) ||
601 RW_WRITE_HELD(&zp->z_zfsvfs->z_teardown_inactive_lock));
603 sa_handle_destroy(zp->z_sa_hdl);
608 * Construct a new znode/vnode and intialize.
610 * This does not do a call to dmu_set_user() that is
611 * up to the caller to do, in case you don't want to
615 zfs_znode_alloc(zfsvfs_t *zfsvfs, dmu_buf_t *db, int blksz,
616 dmu_object_type_t obj_type, sa_handle_t *hdl)
623 sa_bulk_attr_t bulk[9];
626 zp = kmem_cache_alloc(znode_cache, KM_SLEEP);
628 ASSERT(zp->z_dirlocks == NULL);
629 ASSERT(!POINTER_IS_VALID(zp->z_zfsvfs));
632 * Defer setting z_zfsvfs until the znode is ready to be a candidate for
633 * the zfs_znode_move() callback.
637 zp->z_atime_dirty = 0;
640 zp->z_id = db->db_object;
642 zp->z_seq = 0x7A4653;
648 zfs_znode_sa_init(zfsvfs, zp, db, obj_type, hdl);
650 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MODE(zfsvfs), NULL, &mode, 8);
651 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_GEN(zfsvfs), NULL, &zp->z_gen, 8);
652 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_SIZE(zfsvfs), NULL,
654 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_LINKS(zfsvfs), NULL,
656 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_FLAGS(zfsvfs), NULL,
658 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_PARENT(zfsvfs), NULL, &parent, 8);
659 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_ATIME(zfsvfs), NULL,
661 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_UID(zfsvfs), NULL,
663 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_GID(zfsvfs), NULL,
666 if (sa_bulk_lookup(zp->z_sa_hdl, bulk, count) != 0 || zp->z_gen == 0) {
668 sa_handle_destroy(zp->z_sa_hdl);
669 kmem_cache_free(znode_cache, zp);
673 zp->z_uid = zfs_fuid_map_id(zfsvfs, uid, CRED(), ZFS_OWNER);
674 zp->z_gid = zfs_fuid_map_id(zfsvfs, gid, CRED(), ZFS_GROUP);
676 vp->v_vfsp = zfsvfs->z_parent->z_vfs;
678 vp->v_type = IFTOVT((mode_t)mode);
680 switch (vp->v_type) {
682 if (zp->z_pflags & ZFS_XATTR) {
683 vn_setops(vp, zfs_xdvnodeops);
684 vp->v_flag |= V_XATTRDIR;
686 vn_setops(vp, zfs_dvnodeops);
688 zp->z_zn_prefetch = B_TRUE; /* z_prefetch default is enabled */
694 VERIFY(sa_lookup(zp->z_sa_hdl, SA_ZPL_RDEV(zfsvfs),
695 &rdev, sizeof (rdev)) == 0);
697 vp->v_rdev = zfs_cmpldev(rdev);
703 vn_setops(vp, zfs_fvnodeops);
706 vp->v_flag |= VMODSORT;
707 if (parent == zfsvfs->z_shares_dir) {
708 ASSERT(uid == 0 && gid == 0);
709 vn_setops(vp, zfs_sharevnodeops);
711 vn_setops(vp, zfs_fvnodeops);
715 vn_setops(vp, zfs_symvnodeops);
718 vn_setops(vp, zfs_evnodeops);
722 mutex_enter(&zfsvfs->z_znodes_lock);
723 list_insert_tail(&zfsvfs->z_all_znodes, zp);
726 * Everything else must be valid before assigning z_zfsvfs makes the
727 * znode eligible for zfs_znode_move().
729 zp->z_zfsvfs = zfsvfs;
730 mutex_exit(&zfsvfs->z_znodes_lock);
732 VFS_HOLD(zfsvfs->z_vfs);
736 static uint64_t empty_xattr;
737 static uint64_t pad[4];
738 static zfs_acl_phys_t acl_phys;
740 * Create a new DMU object to hold a zfs znode.
742 * IN: dzp - parent directory for new znode
743 * vap - file attributes for new znode
744 * tx - dmu transaction id for zap operations
745 * cr - credentials of caller
747 * IS_ROOT_NODE - new object will be root
748 * IS_XATTR - new object is an attribute
749 * bonuslen - length of bonus buffer
750 * setaclp - File/Dir initial ACL
751 * fuidp - Tracks fuid allocation.
753 * OUT: zpp - allocated znode
757 zfs_mknode(znode_t *dzp, vattr_t *vap, dmu_tx_t *tx, cred_t *cr,
758 uint_t flag, znode_t **zpp, zfs_acl_ids_t *acl_ids)
760 uint64_t crtime[2], atime[2], mtime[2], ctime[2];
761 uint64_t mode, size, links, parent, pflags;
762 uint64_t dzp_pflags = 0;
764 zfsvfs_t *zfsvfs = dzp->z_zfsvfs;
771 dmu_object_type_t obj_type;
772 sa_bulk_attr_t sa_attrs[ZPL_END];
774 zfs_acl_locator_cb_t locate = { 0 };
776 ASSERT(vap && (vap->va_mask & (AT_TYPE|AT_MODE)) == (AT_TYPE|AT_MODE));
778 if (zfsvfs->z_replay) {
779 obj = vap->va_nodeid;
780 now = vap->va_ctime; /* see zfs_replay_create() */
781 gen = vap->va_nblocks; /* ditto */
785 gen = dmu_tx_get_txg(tx);
788 obj_type = zfsvfs->z_use_sa ? DMU_OT_SA : DMU_OT_ZNODE;
789 bonuslen = (obj_type == DMU_OT_SA) ?
790 DN_MAX_BONUSLEN : ZFS_OLD_ZNODE_PHYS_SIZE;
793 * Create a new DMU object.
796 * There's currently no mechanism for pre-reading the blocks that will
797 * be to needed allocate a new object, so we accept the small chance
798 * that there will be an i/o error and we will fail one of the
801 if (vap->va_type == VDIR) {
802 if (zfsvfs->z_replay) {
803 err = zap_create_claim_norm(zfsvfs->z_os, obj,
804 zfsvfs->z_norm, DMU_OT_DIRECTORY_CONTENTS,
805 obj_type, bonuslen, tx);
806 ASSERT3U(err, ==, 0);
808 obj = zap_create_norm(zfsvfs->z_os,
809 zfsvfs->z_norm, DMU_OT_DIRECTORY_CONTENTS,
810 obj_type, bonuslen, tx);
813 if (zfsvfs->z_replay) {
814 err = dmu_object_claim(zfsvfs->z_os, obj,
815 DMU_OT_PLAIN_FILE_CONTENTS, 0,
816 obj_type, bonuslen, tx);
817 ASSERT3U(err, ==, 0);
819 obj = dmu_object_alloc(zfsvfs->z_os,
820 DMU_OT_PLAIN_FILE_CONTENTS, 0,
821 obj_type, bonuslen, tx);
825 ZFS_OBJ_HOLD_ENTER(zfsvfs, obj);
826 VERIFY(0 == sa_buf_hold(zfsvfs->z_os, obj, NULL, &db));
829 * If this is the root, fix up the half-initialized parent pointer
830 * to reference the just-allocated physical data area.
832 if (flag & IS_ROOT_NODE) {
835 dzp_pflags = dzp->z_pflags;
839 * If parent is an xattr, so am I.
841 if (dzp_pflags & ZFS_XATTR) {
845 if (zfsvfs->z_use_fuids)
846 pflags = ZFS_ARCHIVE | ZFS_AV_MODIFIED;
850 if (vap->va_type == VDIR) {
851 size = 2; /* contents ("." and "..") */
852 links = (flag & (IS_ROOT_NODE | IS_XATTR)) ? 2 : 1;
857 if (vap->va_type == VBLK || vap->va_type == VCHR) {
858 rdev = zfs_expldev(vap->va_rdev);
862 mode = acl_ids->z_mode;
867 * No execs denied will be deterimed when zfs_mode_compute() is called.
869 pflags |= acl_ids->z_aclp->z_hints &
870 (ZFS_ACL_TRIVIAL|ZFS_INHERIT_ACE|ZFS_ACL_AUTO_INHERIT|
871 ZFS_ACL_DEFAULTED|ZFS_ACL_PROTECTED);
873 ZFS_TIME_ENCODE(&now, crtime);
874 ZFS_TIME_ENCODE(&now, ctime);
876 if (vap->va_mask & AT_ATIME) {
877 ZFS_TIME_ENCODE(&vap->va_atime, atime);
879 ZFS_TIME_ENCODE(&now, atime);
882 if (vap->va_mask & AT_MTIME) {
883 ZFS_TIME_ENCODE(&vap->va_mtime, mtime);
885 ZFS_TIME_ENCODE(&now, mtime);
888 /* Now add in all of the "SA" attributes */
889 VERIFY(0 == sa_handle_get_from_db(zfsvfs->z_os, db, NULL, SA_HDL_SHARED,
893 * Setup the array of attributes to be replaced/set on the new file
895 * order for DMU_OT_ZNODE is critical since it needs to be constructed
896 * in the old znode_phys_t format. Don't change this ordering
899 if (obj_type == DMU_OT_ZNODE) {
900 SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_ATIME(zfsvfs),
902 SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_MTIME(zfsvfs),
904 SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_CTIME(zfsvfs),
906 SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_CRTIME(zfsvfs),
908 SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_GEN(zfsvfs),
910 SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_MODE(zfsvfs),
912 SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_SIZE(zfsvfs),
914 SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_PARENT(zfsvfs),
917 SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_MODE(zfsvfs),
919 SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_SIZE(zfsvfs),
921 SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_GEN(zfsvfs),
923 SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_UID(zfsvfs), NULL,
924 &acl_ids->z_fuid, 8);
925 SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_GID(zfsvfs), NULL,
926 &acl_ids->z_fgid, 8);
927 SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_PARENT(zfsvfs),
929 SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_FLAGS(zfsvfs),
931 SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_ATIME(zfsvfs),
933 SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_MTIME(zfsvfs),
935 SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_CTIME(zfsvfs),
937 SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_CRTIME(zfsvfs),
941 SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_LINKS(zfsvfs), NULL, &links, 8);
943 if (obj_type == DMU_OT_ZNODE) {
944 SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_XATTR(zfsvfs), NULL,
947 if (obj_type == DMU_OT_ZNODE ||
948 (vap->va_type == VBLK || vap->va_type == VCHR)) {
949 SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_RDEV(zfsvfs),
953 if (obj_type == DMU_OT_ZNODE) {
954 SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_FLAGS(zfsvfs),
956 SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_UID(zfsvfs), NULL,
957 &acl_ids->z_fuid, 8);
958 SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_GID(zfsvfs), NULL,
959 &acl_ids->z_fgid, 8);
960 SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_PAD(zfsvfs), NULL, pad,
961 sizeof (uint64_t) * 4);
962 SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_ZNODE_ACL(zfsvfs), NULL,
963 &acl_phys, sizeof (zfs_acl_phys_t));
964 } else if (acl_ids->z_aclp->z_version >= ZFS_ACL_VERSION_FUID) {
965 SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_DACL_COUNT(zfsvfs), NULL,
966 &acl_ids->z_aclp->z_acl_count, 8);
967 locate.cb_aclp = acl_ids->z_aclp;
968 SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_DACL_ACES(zfsvfs),
969 zfs_acl_data_locator, &locate,
970 acl_ids->z_aclp->z_acl_bytes);
971 mode = zfs_mode_compute(mode, acl_ids->z_aclp, &pflags,
972 acl_ids->z_fuid, acl_ids->z_fgid);
975 VERIFY(sa_replace_all_by_template(sa_hdl, sa_attrs, cnt, tx) == 0);
977 if (!(flag & IS_ROOT_NODE)) {
978 *zpp = zfs_znode_alloc(zfsvfs, db, 0, obj_type, sa_hdl);
979 ASSERT(*zpp != NULL);
982 * If we are creating the root node, the "parent" we
983 * passed in is the znode for the root.
987 (*zpp)->z_sa_hdl = sa_hdl;
990 (*zpp)->z_pflags = pflags;
991 (*zpp)->z_mode = mode;
993 if (vap->va_mask & AT_XVATTR)
994 zfs_xvattr_set(*zpp, (xvattr_t *)vap, tx);
996 if (obj_type == DMU_OT_ZNODE ||
997 acl_ids->z_aclp->z_version < ZFS_ACL_VERSION_FUID) {
998 err = zfs_aclset_common(*zpp, acl_ids->z_aclp, cr, tx);
999 ASSERT3P(err, ==, 0);
1001 ZFS_OBJ_HOLD_EXIT(zfsvfs, obj);
1005 * zfs_xvattr_set only updates the in-core attributes
1006 * it is assumed the caller will be doing an sa_bulk_update
1007 * to push the changes out
1010 zfs_xvattr_set(znode_t *zp, xvattr_t *xvap, dmu_tx_t *tx)
1014 xoap = xva_getxoptattr(xvap);
1017 if (XVA_ISSET_REQ(xvap, XAT_CREATETIME)) {
1019 ZFS_TIME_ENCODE(&xoap->xoa_createtime, times);
1020 (void) sa_update(zp->z_sa_hdl, SA_ZPL_CRTIME(zp->z_zfsvfs),
1021 ×, sizeof (times), tx);
1022 XVA_SET_RTN(xvap, XAT_CREATETIME);
1024 if (XVA_ISSET_REQ(xvap, XAT_READONLY)) {
1025 ZFS_ATTR_SET(zp, ZFS_READONLY, xoap->xoa_readonly,
1027 XVA_SET_RTN(xvap, XAT_READONLY);
1029 if (XVA_ISSET_REQ(xvap, XAT_HIDDEN)) {
1030 ZFS_ATTR_SET(zp, ZFS_HIDDEN, xoap->xoa_hidden,
1032 XVA_SET_RTN(xvap, XAT_HIDDEN);
1034 if (XVA_ISSET_REQ(xvap, XAT_SYSTEM)) {
1035 ZFS_ATTR_SET(zp, ZFS_SYSTEM, xoap->xoa_system,
1037 XVA_SET_RTN(xvap, XAT_SYSTEM);
1039 if (XVA_ISSET_REQ(xvap, XAT_ARCHIVE)) {
1040 ZFS_ATTR_SET(zp, ZFS_ARCHIVE, xoap->xoa_archive,
1042 XVA_SET_RTN(xvap, XAT_ARCHIVE);
1044 if (XVA_ISSET_REQ(xvap, XAT_IMMUTABLE)) {
1045 ZFS_ATTR_SET(zp, ZFS_IMMUTABLE, xoap->xoa_immutable,
1047 XVA_SET_RTN(xvap, XAT_IMMUTABLE);
1049 if (XVA_ISSET_REQ(xvap, XAT_NOUNLINK)) {
1050 ZFS_ATTR_SET(zp, ZFS_NOUNLINK, xoap->xoa_nounlink,
1052 XVA_SET_RTN(xvap, XAT_NOUNLINK);
1054 if (XVA_ISSET_REQ(xvap, XAT_APPENDONLY)) {
1055 ZFS_ATTR_SET(zp, ZFS_APPENDONLY, xoap->xoa_appendonly,
1057 XVA_SET_RTN(xvap, XAT_APPENDONLY);
1059 if (XVA_ISSET_REQ(xvap, XAT_NODUMP)) {
1060 ZFS_ATTR_SET(zp, ZFS_NODUMP, xoap->xoa_nodump,
1062 XVA_SET_RTN(xvap, XAT_NODUMP);
1064 if (XVA_ISSET_REQ(xvap, XAT_OPAQUE)) {
1065 ZFS_ATTR_SET(zp, ZFS_OPAQUE, xoap->xoa_opaque,
1067 XVA_SET_RTN(xvap, XAT_OPAQUE);
1069 if (XVA_ISSET_REQ(xvap, XAT_AV_QUARANTINED)) {
1070 ZFS_ATTR_SET(zp, ZFS_AV_QUARANTINED,
1071 xoap->xoa_av_quarantined, zp->z_pflags, tx);
1072 XVA_SET_RTN(xvap, XAT_AV_QUARANTINED);
1074 if (XVA_ISSET_REQ(xvap, XAT_AV_MODIFIED)) {
1075 ZFS_ATTR_SET(zp, ZFS_AV_MODIFIED, xoap->xoa_av_modified,
1077 XVA_SET_RTN(xvap, XAT_AV_MODIFIED);
1079 if (XVA_ISSET_REQ(xvap, XAT_AV_SCANSTAMP)) {
1080 zfs_sa_set_scanstamp(zp, xvap, tx);
1081 XVA_SET_RTN(xvap, XAT_AV_SCANSTAMP);
1083 if (XVA_ISSET_REQ(xvap, XAT_REPARSE)) {
1084 ZFS_ATTR_SET(zp, ZFS_REPARSE, xoap->xoa_reparse,
1086 XVA_SET_RTN(xvap, XAT_REPARSE);
1091 zfs_zget(zfsvfs_t *zfsvfs, uint64_t obj_num, znode_t **zpp)
1093 dmu_object_info_t doi;
1101 ZFS_OBJ_HOLD_ENTER(zfsvfs, obj_num);
1103 err = sa_buf_hold(zfsvfs->z_os, obj_num, NULL, &db);
1105 ZFS_OBJ_HOLD_EXIT(zfsvfs, obj_num);
1109 dmu_object_info_from_db(db, &doi);
1110 if (doi.doi_bonus_type != DMU_OT_SA &&
1111 (doi.doi_bonus_type != DMU_OT_ZNODE ||
1112 (doi.doi_bonus_type == DMU_OT_ZNODE &&
1113 doi.doi_bonus_size < sizeof (znode_phys_t)))) {
1114 sa_buf_rele(db, NULL);
1115 ZFS_OBJ_HOLD_EXIT(zfsvfs, obj_num);
1119 hdl = dmu_buf_get_user(db);
1121 zp = sa_get_userdata(hdl);
1125 * Since "SA" does immediate eviction we
1126 * should never find a sa handle that doesn't
1127 * know about the znode.
1130 ASSERT3P(zp, !=, NULL);
1132 mutex_enter(&zp->z_lock);
1133 ASSERT3U(zp->z_id, ==, obj_num);
1134 if (zp->z_unlinked) {
1141 sa_buf_rele(db, NULL);
1142 mutex_exit(&zp->z_lock);
1143 ZFS_OBJ_HOLD_EXIT(zfsvfs, obj_num);
1148 * Not found create new znode/vnode
1149 * but only if file exists.
1151 * There is a small window where zfs_vget() could
1152 * find this object while a file create is still in
1153 * progress. This is checked for in zfs_znode_alloc()
1155 * if zfs_znode_alloc() fails it will drop the hold on the
1158 zp = zfs_znode_alloc(zfsvfs, db, doi.doi_data_block_size,
1159 doi.doi_bonus_type, NULL);
1165 ZFS_OBJ_HOLD_EXIT(zfsvfs, obj_num);
1170 zfs_rezget(znode_t *zp)
1172 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
1173 dmu_object_info_t doi;
1175 uint64_t obj_num = zp->z_id;
1178 sa_bulk_attr_t bulk[8];
1183 ZFS_OBJ_HOLD_ENTER(zfsvfs, obj_num);
1185 mutex_enter(&zp->z_acl_lock);
1186 if (zp->z_acl_cached) {
1187 zfs_acl_free(zp->z_acl_cached);
1188 zp->z_acl_cached = NULL;
1191 mutex_exit(&zp->z_acl_lock);
1192 ASSERT(zp->z_sa_hdl == NULL);
1193 err = sa_buf_hold(zfsvfs->z_os, obj_num, NULL, &db);
1195 ZFS_OBJ_HOLD_EXIT(zfsvfs, obj_num);
1199 dmu_object_info_from_db(db, &doi);
1200 if (doi.doi_bonus_type != DMU_OT_SA &&
1201 (doi.doi_bonus_type != DMU_OT_ZNODE ||
1202 (doi.doi_bonus_type == DMU_OT_ZNODE &&
1203 doi.doi_bonus_size < sizeof (znode_phys_t)))) {
1204 sa_buf_rele(db, NULL);
1205 ZFS_OBJ_HOLD_EXIT(zfsvfs, obj_num);
1209 zfs_znode_sa_init(zfsvfs, zp, db, doi.doi_bonus_type, NULL);
1211 /* reload cached values */
1212 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_GEN(zfsvfs), NULL,
1213 &gen, sizeof (gen));
1214 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_SIZE(zfsvfs), NULL,
1215 &zp->z_size, sizeof (zp->z_size));
1216 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_LINKS(zfsvfs), NULL,
1217 &zp->z_links, sizeof (zp->z_links));
1218 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_FLAGS(zfsvfs), NULL,
1219 &zp->z_pflags, sizeof (zp->z_pflags));
1220 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_ATIME(zfsvfs), NULL,
1221 &zp->z_atime, sizeof (zp->z_atime));
1222 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_UID(zfsvfs), NULL,
1223 &uid, sizeof (uid));
1224 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_GID(zfsvfs), NULL,
1225 &gid, sizeof (gid));
1226 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MODE(zfsvfs), NULL,
1227 &mode, sizeof (mode));
1231 if (sa_bulk_lookup(zp->z_sa_hdl, bulk, count)) {
1232 zfs_znode_dmu_fini(zp);
1233 ZFS_OBJ_HOLD_EXIT(zfsvfs, obj_num);
1237 if (gen != zp->z_gen) {
1238 zfs_znode_dmu_fini(zp);
1239 ZFS_OBJ_HOLD_EXIT(zfsvfs, obj_num);
1243 zp->z_uid = zfs_fuid_map_id(zfsvfs, uid, CRED(), ZFS_OWNER);
1244 zp->z_gid = zfs_fuid_map_id(zfsvfs, gid, CRED(), ZFS_GROUP);
1245 zp->z_unlinked = (zp->z_links == 0);
1246 zp->z_blksz = doi.doi_data_block_size;
1248 ZFS_OBJ_HOLD_EXIT(zfsvfs, obj_num);
1254 zfs_znode_delete(znode_t *zp, dmu_tx_t *tx)
1256 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
1257 objset_t *os = zfsvfs->z_os;
1258 uint64_t obj = zp->z_id;
1259 uint64_t acl_obj = ZFS_EXTERNAL_ACL(zp);
1261 ZFS_OBJ_HOLD_ENTER(zfsvfs, obj);
1263 VERIFY(0 == dmu_object_free(os, acl_obj, tx));
1264 VERIFY(0 == dmu_object_free(os, obj, tx));
1265 zfs_znode_dmu_fini(zp);
1266 ZFS_OBJ_HOLD_EXIT(zfsvfs, obj);
1271 zfs_zinactive(znode_t *zp)
1273 vnode_t *vp = ZTOV(zp);
1274 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
1275 uint64_t z_id = zp->z_id;
1277 ASSERT(zp->z_sa_hdl);
1280 * Don't allow a zfs_zget() while were trying to release this znode
1282 ZFS_OBJ_HOLD_ENTER(zfsvfs, z_id);
1284 mutex_enter(&zp->z_lock);
1285 mutex_enter(&vp->v_lock);
1287 if (vp->v_count > 0 || vn_has_cached_data(vp)) {
1289 * If the hold count is greater than zero, somebody has
1290 * obtained a new reference on this znode while we were
1291 * processing it here, so we are done. If we still have
1292 * mapped pages then we are also done, since we don't
1293 * want to inactivate the znode until the pages get pushed.
1295 * XXX - if vn_has_cached_data(vp) is true, but count == 0,
1296 * this seems like it would leave the znode hanging with
1297 * no chance to go inactive...
1299 mutex_exit(&vp->v_lock);
1300 mutex_exit(&zp->z_lock);
1301 ZFS_OBJ_HOLD_EXIT(zfsvfs, z_id);
1304 mutex_exit(&vp->v_lock);
1307 * If this was the last reference to a file with no links,
1308 * remove the file from the file system.
1310 if (zp->z_unlinked) {
1311 mutex_exit(&zp->z_lock);
1312 ZFS_OBJ_HOLD_EXIT(zfsvfs, z_id);
1317 mutex_exit(&zp->z_lock);
1318 zfs_znode_dmu_fini(zp);
1319 ZFS_OBJ_HOLD_EXIT(zfsvfs, z_id);
1324 zfs_znode_free(znode_t *zp)
1326 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
1328 vn_invalid(ZTOV(zp));
1330 ASSERT(ZTOV(zp)->v_count == 0);
1332 mutex_enter(&zfsvfs->z_znodes_lock);
1333 POINTER_INVALIDATE(&zp->z_zfsvfs);
1334 list_remove(&zfsvfs->z_all_znodes, zp);
1335 mutex_exit(&zfsvfs->z_znodes_lock);
1337 if (zp->z_acl_cached) {
1338 zfs_acl_free(zp->z_acl_cached);
1339 zp->z_acl_cached = NULL;
1342 kmem_cache_free(znode_cache, zp);
1344 VFS_RELE(zfsvfs->z_vfs);
1348 zfs_tstamp_update_setup(znode_t *zp, uint_t flag, uint64_t mtime[2],
1349 uint64_t ctime[2], boolean_t have_tx)
1355 if (have_tx) { /* will sa_bulk_update happen really soon? */
1356 zp->z_atime_dirty = 0;
1359 zp->z_atime_dirty = 1;
1362 if (flag & AT_ATIME) {
1363 ZFS_TIME_ENCODE(&now, zp->z_atime);
1366 if (flag & AT_MTIME) {
1367 ZFS_TIME_ENCODE(&now, mtime);
1368 if (zp->z_zfsvfs->z_use_fuids) {
1369 zp->z_pflags |= (ZFS_ARCHIVE |
1374 if (flag & AT_CTIME) {
1375 ZFS_TIME_ENCODE(&now, ctime);
1376 if (zp->z_zfsvfs->z_use_fuids)
1377 zp->z_pflags |= ZFS_ARCHIVE;
1382 * Grow the block size for a file.
1384 * IN: zp - znode of file to free data in.
1385 * size - requested block size
1386 * tx - open transaction.
1388 * NOTE: this function assumes that the znode is write locked.
1391 zfs_grow_blocksize(znode_t *zp, uint64_t size, dmu_tx_t *tx)
1396 if (size <= zp->z_blksz)
1399 * If the file size is already greater than the current blocksize,
1400 * we will not grow. If there is more than one block in a file,
1401 * the blocksize cannot change.
1403 if (zp->z_blksz && zp->z_size > zp->z_blksz)
1406 error = dmu_object_set_blocksize(zp->z_zfsvfs->z_os, zp->z_id,
1409 if (error == ENOTSUP)
1411 ASSERT3U(error, ==, 0);
1413 /* What blocksize did we actually get? */
1414 dmu_object_size_from_db(sa_get_db(zp->z_sa_hdl), &zp->z_blksz, &dummy);
1418 * This is a dummy interface used when pvn_vplist_dirty() should *not*
1419 * be calling back into the fs for a putpage(). E.g.: when truncating
1420 * a file, the pages being "thrown away* don't need to be written out.
1424 zfs_no_putpage(vnode_t *vp, page_t *pp, u_offset_t *offp, size_t *lenp,
1425 int flags, cred_t *cr)
1432 * Increase the file length
1434 * IN: zp - znode of file to free data in.
1435 * end - new end-of-file
1437 * RETURN: 0 if success
1438 * error code if failure
1441 zfs_extend(znode_t *zp, uint64_t end)
1443 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
1450 * We will change zp_size, lock the whole file.
1452 rl = zfs_range_lock(zp, 0, UINT64_MAX, RL_WRITER);
1455 * Nothing to do if file already at desired length.
1457 if (end <= zp->z_size) {
1458 zfs_range_unlock(rl);
1462 tx = dmu_tx_create(zfsvfs->z_os);
1463 dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_FALSE);
1464 zfs_sa_upgrade_txholds(tx, zp);
1465 if (end > zp->z_blksz &&
1466 (!ISP2(zp->z_blksz) || zp->z_blksz < zfsvfs->z_max_blksz)) {
1468 * We are growing the file past the current block size.
1470 if (zp->z_blksz > zp->z_zfsvfs->z_max_blksz) {
1471 ASSERT(!ISP2(zp->z_blksz));
1472 newblksz = MIN(end, SPA_MAXBLOCKSIZE);
1474 newblksz = MIN(end, zp->z_zfsvfs->z_max_blksz);
1476 dmu_tx_hold_write(tx, zp->z_id, 0, newblksz);
1481 error = dmu_tx_assign(tx, TXG_NOWAIT);
1483 if (error == ERESTART) {
1489 zfs_range_unlock(rl);
1494 zfs_grow_blocksize(zp, newblksz, tx);
1498 VERIFY(0 == sa_update(zp->z_sa_hdl, SA_ZPL_SIZE(zp->z_zfsvfs),
1499 &zp->z_size, sizeof (zp->z_size), tx));
1501 zfs_range_unlock(rl);
1509 * Free space in a file.
1511 * IN: zp - znode of file to free data in.
1512 * off - start of section to free.
1513 * len - length of section to free.
1515 * RETURN: 0 if success
1516 * error code if failure
1519 zfs_free_range(znode_t *zp, uint64_t off, uint64_t len)
1521 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
1526 * Lock the range being freed.
1528 rl = zfs_range_lock(zp, off, len, RL_WRITER);
1531 * Nothing to do if file already at desired length.
1533 if (off >= zp->z_size) {
1534 zfs_range_unlock(rl);
1538 if (off + len > zp->z_size)
1539 len = zp->z_size - off;
1541 error = dmu_free_long_range(zfsvfs->z_os, zp->z_id, off, len);
1543 zfs_range_unlock(rl);
1551 * IN: zp - znode of file to free data in.
1552 * end - new end-of-file.
1554 * RETURN: 0 if success
1555 * error code if failure
1558 zfs_trunc(znode_t *zp, uint64_t end)
1560 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
1561 vnode_t *vp = ZTOV(zp);
1567 * We will change zp_size, lock the whole file.
1569 rl = zfs_range_lock(zp, 0, UINT64_MAX, RL_WRITER);
1572 * Nothing to do if file already at desired length.
1574 if (end >= zp->z_size) {
1575 zfs_range_unlock(rl);
1579 error = dmu_free_long_range(zfsvfs->z_os, zp->z_id, end, -1);
1581 zfs_range_unlock(rl);
1585 tx = dmu_tx_create(zfsvfs->z_os);
1586 dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_FALSE);
1587 zfs_sa_upgrade_txholds(tx, zp);
1588 error = dmu_tx_assign(tx, TXG_NOWAIT);
1590 if (error == ERESTART) {
1596 zfs_range_unlock(rl);
1602 VERIFY(0 == sa_update(zp->z_sa_hdl, SA_ZPL_SIZE(zp->z_zfsvfs),
1603 &zp->z_size, sizeof (zp->z_size), tx));
1608 * Clear any mapped pages in the truncated region. This has to
1609 * happen outside of the transaction to avoid the possibility of
1610 * a deadlock with someone trying to push a page that we are
1611 * about to invalidate.
1613 if (vn_has_cached_data(vp)) {
1615 uint64_t start = end & PAGEMASK;
1616 int poff = end & PAGEOFFSET;
1618 if (poff != 0 && (pp = page_lookup(vp, start, SE_SHARED))) {
1620 * We need to zero a partial page.
1622 pagezero(pp, poff, PAGESIZE - poff);
1626 error = pvn_vplist_dirty(vp, start, zfs_no_putpage,
1627 B_INVAL | B_TRUNC, NULL);
1631 zfs_range_unlock(rl);
1637 * Free space in a file
1639 * IN: zp - znode of file to free data in.
1640 * off - start of range
1641 * len - end of range (0 => EOF)
1642 * flag - current file open mode flags.
1643 * log - TRUE if this action should be logged
1645 * RETURN: 0 if success
1646 * error code if failure
1649 zfs_freesp(znode_t *zp, uint64_t off, uint64_t len, int flag, boolean_t log)
1651 vnode_t *vp = ZTOV(zp);
1653 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
1654 zilog_t *zilog = zfsvfs->z_log;
1656 uint64_t mtime[2], ctime[2];
1657 sa_bulk_attr_t bulk[3];
1661 if ((error = sa_lookup(zp->z_sa_hdl, SA_ZPL_MODE(zfsvfs), &mode,
1662 sizeof (mode))) != 0)
1665 if (off > zp->z_size) {
1666 error = zfs_extend(zp, off+len);
1667 if (error == 0 && log)
1674 * Check for any locks in the region to be freed.
1677 if (MANDLOCK(vp, (mode_t)mode)) {
1678 uint64_t length = (len ? len : zp->z_size - off);
1679 if (error = chklock(vp, FWRITE, off, length, flag, NULL))
1684 error = zfs_trunc(zp, off);
1686 if ((error = zfs_free_range(zp, off, len)) == 0 &&
1687 off + len > zp->z_size)
1688 error = zfs_extend(zp, off+len);
1693 tx = dmu_tx_create(zfsvfs->z_os);
1694 dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_FALSE);
1695 zfs_sa_upgrade_txholds(tx, zp);
1696 error = dmu_tx_assign(tx, TXG_NOWAIT);
1698 if (error == ERESTART) {
1707 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MTIME(zfsvfs), NULL, mtime, 16);
1708 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_CTIME(zfsvfs), NULL, ctime, 16);
1709 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_FLAGS(zfsvfs),
1710 NULL, &zp->z_pflags, 8);
1711 zfs_tstamp_update_setup(zp, CONTENT_MODIFIED, mtime, ctime, B_TRUE);
1712 error = sa_bulk_update(zp->z_sa_hdl, bulk, count, tx);
1715 zfs_log_truncate(zilog, tx, TX_TRUNCATE, zp, off, len);
1722 zfs_create_fs(objset_t *os, cred_t *cr, nvlist_t *zplprops, dmu_tx_t *tx)
1725 uint64_t moid, obj, sa_obj, version;
1726 uint64_t sense = ZFS_CASE_SENSITIVE;
1731 znode_t *rootzp = NULL;
1735 zfs_acl_ids_t acl_ids;
1738 * First attempt to create master node.
1741 * In an empty objset, there are no blocks to read and thus
1742 * there can be no i/o errors (which we assert below).
1744 moid = MASTER_NODE_OBJ;
1745 error = zap_create_claim(os, moid, DMU_OT_MASTER_NODE,
1746 DMU_OT_NONE, 0, tx);
1750 * Set starting attributes.
1752 version = zfs_zpl_version_map(spa_version(dmu_objset_spa(os)));
1754 while ((elem = nvlist_next_nvpair(zplprops, elem)) != NULL) {
1755 /* For the moment we expect all zpl props to be uint64_ts */
1759 ASSERT(nvpair_type(elem) == DATA_TYPE_UINT64);
1760 VERIFY(nvpair_value_uint64(elem, &val) == 0);
1761 name = nvpair_name(elem);
1762 if (strcmp(name, zfs_prop_to_name(ZFS_PROP_VERSION)) == 0) {
1766 error = zap_update(os, moid, name, 8, 1, &val, tx);
1769 if (strcmp(name, zfs_prop_to_name(ZFS_PROP_NORMALIZE)) == 0)
1771 else if (strcmp(name, zfs_prop_to_name(ZFS_PROP_CASE)) == 0)
1774 ASSERT(version != 0);
1775 error = zap_update(os, moid, ZPL_VERSION_STR, 8, 1, &version, tx);
1778 * Create zap object used for SA attribute registration
1781 if (version >= ZPL_VERSION_SA) {
1782 sa_obj = zap_create(os, DMU_OT_SA_MASTER_NODE,
1783 DMU_OT_NONE, 0, tx);
1784 error = zap_add(os, moid, ZFS_SA_ATTRS, 8, 1, &sa_obj, tx);
1790 * Create a delete queue.
1792 obj = zap_create(os, DMU_OT_UNLINKED_SET, DMU_OT_NONE, 0, tx);
1794 error = zap_add(os, moid, ZFS_UNLINKED_SET, 8, 1, &obj, tx);
1798 * Create root znode. Create minimal znode/vnode/zfsvfs
1799 * to allow zfs_mknode to work.
1801 vattr.va_mask = AT_MODE|AT_UID|AT_GID|AT_TYPE;
1802 vattr.va_type = VDIR;
1803 vattr.va_mode = S_IFDIR|0755;
1804 vattr.va_uid = crgetuid(cr);
1805 vattr.va_gid = crgetgid(cr);
1807 rootzp = kmem_cache_alloc(znode_cache, KM_SLEEP);
1808 rootzp->z_unlinked = 0;
1809 rootzp->z_atime_dirty = 0;
1810 rootzp->z_is_sa = USE_SA(version, os);
1816 bzero(&zfsvfs, sizeof (zfsvfs_t));
1819 zfsvfs.z_parent = &zfsvfs;
1820 zfsvfs.z_version = version;
1821 zfsvfs.z_use_fuids = USE_FUIDS(version, os);
1822 zfsvfs.z_use_sa = USE_SA(version, os);
1823 zfsvfs.z_norm = norm;
1825 zfsvfs.z_attr_table = sa_setup(os, sa_obj, zfs_attr_table, ZPL_END);
1828 * Fold case on file systems that are always or sometimes case
1831 if (sense == ZFS_CASE_INSENSITIVE || sense == ZFS_CASE_MIXED)
1832 zfsvfs.z_norm |= U8_TEXTPREP_TOUPPER;
1834 mutex_init(&zfsvfs.z_znodes_lock, NULL, MUTEX_DEFAULT, NULL);
1835 list_create(&zfsvfs.z_all_znodes, sizeof (znode_t),
1836 offsetof(znode_t, z_link_node));
1838 for (i = 0; i != ZFS_OBJ_MTX_SZ; i++)
1839 mutex_init(&zfsvfs.z_hold_mtx[i], NULL, MUTEX_DEFAULT, NULL);
1841 ASSERT(!POINTER_IS_VALID(rootzp->z_zfsvfs));
1842 rootzp->z_zfsvfs = &zfsvfs;
1843 VERIFY(0 == zfs_acl_ids_create(rootzp, IS_ROOT_NODE, &vattr,
1844 cr, NULL, &acl_ids));
1845 zfs_mknode(rootzp, &vattr, tx, cr, IS_ROOT_NODE, &zp, &acl_ids);
1846 ASSERT3P(zp, ==, rootzp);
1847 ASSERT(!vn_in_dnlc(ZTOV(rootzp))); /* not valid to move */
1848 error = zap_add(os, moid, ZFS_ROOT_OBJ, 8, 1, &rootzp->z_id, tx);
1850 zfs_acl_ids_free(&acl_ids);
1851 POINTER_INVALIDATE(&rootzp->z_zfsvfs);
1853 ZTOV(rootzp)->v_count = 0;
1854 sa_handle_destroy(rootzp->z_sa_hdl);
1855 kmem_cache_free(znode_cache, rootzp);
1858 * Create shares directory
1861 error = zfs_create_share_dir(&zfsvfs, tx);
1865 for (i = 0; i != ZFS_OBJ_MTX_SZ; i++)
1866 mutex_destroy(&zfsvfs.z_hold_mtx[i]);
1869 #endif /* _KERNEL */
1872 * Given an object number, return its parent object number and whether
1873 * or not the object is an extended attribute directory.
1876 zfs_obj_to_pobj(objset_t *osp, uint64_t obj, uint64_t *pobjp, int *is_xattrdir,
1877 sa_attr_type_t *sa_table)
1880 dmu_object_info_t doi;
1885 sa_bulk_attr_t bulk[3];
1889 if ((error = sa_buf_hold(osp, obj, FTAG, &db)) != 0)
1892 dmu_object_info_from_db(db, &doi);
1893 if ((doi.doi_bonus_type != DMU_OT_SA &&
1894 doi.doi_bonus_type != DMU_OT_ZNODE) ||
1895 doi.doi_bonus_type == DMU_OT_ZNODE &&
1896 doi.doi_bonus_size < sizeof (znode_phys_t)) {
1897 sa_buf_rele(db, FTAG);
1901 if ((error = sa_handle_get(osp, obj, NULL, SA_HDL_PRIVATE,
1903 sa_buf_rele(db, FTAG);
1907 SA_ADD_BULK_ATTR(bulk, count, sa_table[ZPL_PARENT],
1909 SA_ADD_BULK_ATTR(bulk, count, sa_table[ZPL_FLAGS], NULL,
1911 SA_ADD_BULK_ATTR(bulk, count, sa_table[ZPL_MODE], NULL,
1914 if ((error = sa_bulk_lookup(hdl, bulk, count)) != 0) {
1915 sa_buf_rele(db, FTAG);
1916 sa_handle_destroy(hdl);
1920 *is_xattrdir = ((pflags & ZFS_XATTR) != 0) && S_ISDIR(mode);
1921 sa_handle_destroy(hdl);
1922 sa_buf_rele(db, FTAG);
1928 zfs_obj_to_path(objset_t *osp, uint64_t obj, char *buf, int len)
1930 char *path = buf + len - 1;
1931 sa_attr_type_t *sa_table;
1933 uint64_t sa_obj = 0;
1937 error = zap_lookup(osp, MASTER_NODE_OBJ, ZFS_SA_ATTRS, 8, 1, &sa_obj);
1939 if (error != 0 && error != ENOENT)
1942 sa_table = sa_setup(osp, sa_obj, zfs_attr_table, ZPL_END);
1946 char component[MAXNAMELEN + 2];
1950 if ((error = zfs_obj_to_pobj(osp, obj, &pobj,
1951 &is_xattrdir, sa_table)) != 0)
1962 (void) sprintf(component + 1, "<xattrdir>");
1964 error = zap_value_search(osp, pobj, obj,
1965 ZFS_DIRENT_OBJ(-1ULL), component + 1);
1970 complen = strlen(component);
1972 ASSERT(path >= buf);
1973 bcopy(component, path, complen);
1978 (void) memmove(buf, path, buf + len - path);