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) 2012, 2018 by Delphix. All rights reserved.
26 /* Portions Copyright 2007 Jeremy Teo */
29 #include <sys/types.h>
30 #include <sys/param.h>
32 #include <sys/sysmacros.h>
33 #include <sys/mntent.h>
34 #include <sys/u8_textprep.h>
35 #include <sys/dsl_dataset.h>
37 #include <sys/vnode.h>
40 #include <sys/errno.h>
42 #include <sys/atomic.h>
43 #include <sys/zfs_dir.h>
44 #include <sys/zfs_acl.h>
45 #include <sys/zfs_ioctl.h>
46 #include <sys/zfs_rlock.h>
47 #include <sys/zfs_fuid.h>
48 #include <sys/zfs_vnops.h>
49 #include <sys/zfs_ctldir.h>
50 #include <sys/dnode.h>
51 #include <sys/fs/zfs.h>
56 #include <sys/dmu_objset.h>
57 #include <sys/dmu_tx.h>
58 #include <sys/refcount.h>
61 #include <sys/zfs_znode.h>
63 #include <sys/zfs_sa.h>
64 #include <sys/zfs_stat.h>
67 #include "zfs_comutil.h"
70 * Define ZNODE_STATS to turn on statistic gathering. By default, it is only
71 * turned on when DEBUG is also defined.
78 #define ZNODE_STAT_ADD(stat) ((stat)++)
80 #define ZNODE_STAT_ADD(stat) /* nothing */
81 #endif /* ZNODE_STATS */
84 * Functions needed for userland (ie: libzpool) are not put under
85 * #ifdef_KERNEL; the rest of the functions have dependencies
86 * (such as VFS logic) that will not compile easily in userland.
90 static kmem_cache_t
*znode_cache
= NULL
;
91 static kmem_cache_t
*znode_hold_cache
= NULL
;
92 unsigned int zfs_object_mutex_size
= ZFS_OBJ_MTX_SZ
;
95 * This callback is invoked when acquiring a RL_WRITER or RL_APPEND lock on
96 * z_rangelock. It will modify the offset and length of the lock to reflect
97 * znode-specific information, and convert RL_APPEND to RL_WRITER. This is
98 * called with the rangelock_t's rl_lock held, which avoids races.
101 zfs_rangelock_cb(locked_range_t
*new, void *arg
)
106 * If in append mode, convert to writer and lock starting at the
107 * current end of file.
109 if (new->lr_type
== RL_APPEND
) {
110 new->lr_offset
= zp
->z_size
;
111 new->lr_type
= RL_WRITER
;
115 * If we need to grow the block size then lock the whole file range.
117 uint64_t end_size
= MAX(zp
->z_size
, new->lr_offset
+ new->lr_length
);
118 if (end_size
> zp
->z_blksz
&& (!ISP2(zp
->z_blksz
) ||
119 zp
->z_blksz
< ZTOZSB(zp
)->z_max_blksz
)) {
121 new->lr_length
= UINT64_MAX
;
127 zfs_znode_cache_constructor(void *buf
, void *arg
, int kmflags
)
131 inode_init_once(ZTOI(zp
));
132 list_link_init(&zp
->z_link_node
);
134 mutex_init(&zp
->z_lock
, NULL
, MUTEX_DEFAULT
, NULL
);
135 rw_init(&zp
->z_parent_lock
, NULL
, RW_DEFAULT
, NULL
);
136 rw_init(&zp
->z_name_lock
, NULL
, RW_NOLOCKDEP
, NULL
);
137 mutex_init(&zp
->z_acl_lock
, NULL
, MUTEX_DEFAULT
, NULL
);
138 rw_init(&zp
->z_xattr_lock
, NULL
, RW_DEFAULT
, NULL
);
140 rangelock_init(&zp
->z_rangelock
, zfs_rangelock_cb
, zp
);
142 zp
->z_dirlocks
= NULL
;
143 zp
->z_acl_cached
= NULL
;
144 zp
->z_xattr_cached
= NULL
;
145 zp
->z_xattr_parent
= 0;
152 zfs_znode_cache_destructor(void *buf
, void *arg
)
156 ASSERT(!list_link_active(&zp
->z_link_node
));
157 mutex_destroy(&zp
->z_lock
);
158 rw_destroy(&zp
->z_parent_lock
);
159 rw_destroy(&zp
->z_name_lock
);
160 mutex_destroy(&zp
->z_acl_lock
);
161 rw_destroy(&zp
->z_xattr_lock
);
162 rangelock_fini(&zp
->z_rangelock
);
164 ASSERT(zp
->z_dirlocks
== NULL
);
165 ASSERT(zp
->z_acl_cached
== NULL
);
166 ASSERT(zp
->z_xattr_cached
== NULL
);
170 zfs_znode_hold_cache_constructor(void *buf
, void *arg
, int kmflags
)
172 znode_hold_t
*zh
= buf
;
174 mutex_init(&zh
->zh_lock
, NULL
, MUTEX_DEFAULT
, NULL
);
175 zfs_refcount_create(&zh
->zh_refcount
);
176 zh
->zh_obj
= ZFS_NO_OBJECT
;
182 zfs_znode_hold_cache_destructor(void *buf
, void *arg
)
184 znode_hold_t
*zh
= buf
;
186 mutex_destroy(&zh
->zh_lock
);
187 zfs_refcount_destroy(&zh
->zh_refcount
);
194 * Initialize zcache. The KMC_SLAB hint is used in order that it be
195 * backed by kmalloc() when on the Linux slab in order that any
196 * wait_on_bit() operations on the related inode operate properly.
198 ASSERT(znode_cache
== NULL
);
199 znode_cache
= kmem_cache_create("zfs_znode_cache",
200 sizeof (znode_t
), 0, zfs_znode_cache_constructor
,
201 zfs_znode_cache_destructor
, NULL
, NULL
, NULL
, KMC_SLAB
);
203 ASSERT(znode_hold_cache
== NULL
);
204 znode_hold_cache
= kmem_cache_create("zfs_znode_hold_cache",
205 sizeof (znode_hold_t
), 0, zfs_znode_hold_cache_constructor
,
206 zfs_znode_hold_cache_destructor
, NULL
, NULL
, NULL
, 0);
216 kmem_cache_destroy(znode_cache
);
219 if (znode_hold_cache
)
220 kmem_cache_destroy(znode_hold_cache
);
221 znode_hold_cache
= NULL
;
225 * The zfs_znode_hold_enter() / zfs_znode_hold_exit() functions are used to
226 * serialize access to a znode and its SA buffer while the object is being
227 * created or destroyed. This kind of locking would normally reside in the
228 * znode itself but in this case that's impossible because the znode and SA
229 * buffer may not yet exist. Therefore the locking is handled externally
230 * with an array of mutexs and AVLs trees which contain per-object locks.
232 * In zfs_znode_hold_enter() a per-object lock is created as needed, inserted
233 * in to the correct AVL tree and finally the per-object lock is held. In
234 * zfs_znode_hold_exit() the process is reversed. The per-object lock is
235 * released, removed from the AVL tree and destroyed if there are no waiters.
237 * This scheme has two important properties:
239 * 1) No memory allocations are performed while holding one of the z_hold_locks.
240 * This ensures evict(), which can be called from direct memory reclaim, will
241 * never block waiting on a z_hold_locks which just happens to have hashed
244 * 2) All locks used to serialize access to an object are per-object and never
245 * shared. This minimizes lock contention without creating a large number
246 * of dedicated locks.
248 * On the downside it does require znode_lock_t structures to be frequently
249 * allocated and freed. However, because these are backed by a kmem cache
250 * and very short lived this cost is minimal.
253 zfs_znode_hold_compare(const void *a
, const void *b
)
255 const znode_hold_t
*zh_a
= (const znode_hold_t
*)a
;
256 const znode_hold_t
*zh_b
= (const znode_hold_t
*)b
;
258 return (AVL_CMP(zh_a
->zh_obj
, zh_b
->zh_obj
));
262 zfs_znode_held(zfsvfs_t
*zfsvfs
, uint64_t obj
)
264 znode_hold_t
*zh
, search
;
265 int i
= ZFS_OBJ_HASH(zfsvfs
, obj
);
270 mutex_enter(&zfsvfs
->z_hold_locks
[i
]);
271 zh
= avl_find(&zfsvfs
->z_hold_trees
[i
], &search
, NULL
);
272 held
= (zh
&& MUTEX_HELD(&zh
->zh_lock
)) ? B_TRUE
: B_FALSE
;
273 mutex_exit(&zfsvfs
->z_hold_locks
[i
]);
278 static znode_hold_t
*
279 zfs_znode_hold_enter(zfsvfs_t
*zfsvfs
, uint64_t obj
)
281 znode_hold_t
*zh
, *zh_new
, search
;
282 int i
= ZFS_OBJ_HASH(zfsvfs
, obj
);
283 boolean_t found
= B_FALSE
;
285 zh_new
= kmem_cache_alloc(znode_hold_cache
, KM_SLEEP
);
286 zh_new
->zh_obj
= obj
;
289 mutex_enter(&zfsvfs
->z_hold_locks
[i
]);
290 zh
= avl_find(&zfsvfs
->z_hold_trees
[i
], &search
, NULL
);
291 if (likely(zh
== NULL
)) {
293 avl_add(&zfsvfs
->z_hold_trees
[i
], zh
);
295 ASSERT3U(zh
->zh_obj
, ==, obj
);
298 zfs_refcount_add(&zh
->zh_refcount
, NULL
);
299 mutex_exit(&zfsvfs
->z_hold_locks
[i
]);
302 kmem_cache_free(znode_hold_cache
, zh_new
);
304 ASSERT(MUTEX_NOT_HELD(&zh
->zh_lock
));
305 ASSERT3S(zfs_refcount_count(&zh
->zh_refcount
), >, 0);
306 mutex_enter(&zh
->zh_lock
);
312 zfs_znode_hold_exit(zfsvfs_t
*zfsvfs
, znode_hold_t
*zh
)
314 int i
= ZFS_OBJ_HASH(zfsvfs
, zh
->zh_obj
);
315 boolean_t remove
= B_FALSE
;
317 ASSERT(zfs_znode_held(zfsvfs
, zh
->zh_obj
));
318 ASSERT3S(zfs_refcount_count(&zh
->zh_refcount
), >, 0);
319 mutex_exit(&zh
->zh_lock
);
321 mutex_enter(&zfsvfs
->z_hold_locks
[i
]);
322 if (zfs_refcount_remove(&zh
->zh_refcount
, NULL
) == 0) {
323 avl_remove(&zfsvfs
->z_hold_trees
[i
], zh
);
326 mutex_exit(&zfsvfs
->z_hold_locks
[i
]);
328 if (remove
== B_TRUE
)
329 kmem_cache_free(znode_hold_cache
, zh
);
333 zfs_znode_sa_init(zfsvfs_t
*zfsvfs
, znode_t
*zp
,
334 dmu_buf_t
*db
, dmu_object_type_t obj_type
, sa_handle_t
*sa_hdl
)
336 ASSERT(zfs_znode_held(zfsvfs
, zp
->z_id
));
338 mutex_enter(&zp
->z_lock
);
340 ASSERT(zp
->z_sa_hdl
== NULL
);
341 ASSERT(zp
->z_acl_cached
== NULL
);
342 if (sa_hdl
== NULL
) {
343 VERIFY(0 == sa_handle_get_from_db(zfsvfs
->z_os
, db
, zp
,
344 SA_HDL_SHARED
, &zp
->z_sa_hdl
));
346 zp
->z_sa_hdl
= sa_hdl
;
347 sa_set_userp(sa_hdl
, zp
);
350 zp
->z_is_sa
= (obj_type
== DMU_OT_SA
) ? B_TRUE
: B_FALSE
;
352 mutex_exit(&zp
->z_lock
);
356 zfs_znode_dmu_fini(znode_t
*zp
)
358 ASSERT(zfs_znode_held(ZTOZSB(zp
), zp
->z_id
) || zp
->z_unlinked
||
359 RW_WRITE_HELD(&ZTOZSB(zp
)->z_teardown_inactive_lock
));
361 sa_handle_destroy(zp
->z_sa_hdl
);
366 * Called by new_inode() to allocate a new inode.
369 zfs_inode_alloc(struct super_block
*sb
, struct inode
**ip
)
373 zp
= kmem_cache_alloc(znode_cache
, KM_SLEEP
);
380 * Called in multiple places when an inode should be destroyed.
383 zfs_inode_destroy(struct inode
*ip
)
385 znode_t
*zp
= ITOZ(ip
);
386 zfsvfs_t
*zfsvfs
= ZTOZSB(zp
);
388 mutex_enter(&zfsvfs
->z_znodes_lock
);
389 if (list_link_active(&zp
->z_link_node
)) {
390 list_remove(&zfsvfs
->z_all_znodes
, zp
);
391 zfsvfs
->z_nr_znodes
--;
393 mutex_exit(&zfsvfs
->z_znodes_lock
);
395 if (zp
->z_acl_cached
) {
396 zfs_acl_free(zp
->z_acl_cached
);
397 zp
->z_acl_cached
= NULL
;
400 if (zp
->z_xattr_cached
) {
401 nvlist_free(zp
->z_xattr_cached
);
402 zp
->z_xattr_cached
= NULL
;
405 kmem_cache_free(znode_cache
, zp
);
409 zfs_inode_set_ops(zfsvfs_t
*zfsvfs
, struct inode
*ip
)
413 switch (ip
->i_mode
& S_IFMT
) {
415 ip
->i_op
= &zpl_inode_operations
;
416 ip
->i_fop
= &zpl_file_operations
;
417 ip
->i_mapping
->a_ops
= &zpl_address_space_operations
;
421 ip
->i_op
= &zpl_dir_inode_operations
;
422 ip
->i_fop
= &zpl_dir_file_operations
;
423 ITOZ(ip
)->z_zn_prefetch
= B_TRUE
;
427 ip
->i_op
= &zpl_symlink_inode_operations
;
431 * rdev is only stored in a SA only for device files.
435 (void) sa_lookup(ITOZ(ip
)->z_sa_hdl
, SA_ZPL_RDEV(zfsvfs
), &rdev
,
440 init_special_inode(ip
, ip
->i_mode
, rdev
);
441 ip
->i_op
= &zpl_special_inode_operations
;
445 zfs_panic_recover("inode %llu has invalid mode: 0x%x\n",
446 (u_longlong_t
)ip
->i_ino
, ip
->i_mode
);
448 /* Assume the inode is a file and attempt to continue */
449 ip
->i_mode
= S_IFREG
| 0644;
450 ip
->i_op
= &zpl_inode_operations
;
451 ip
->i_fop
= &zpl_file_operations
;
452 ip
->i_mapping
->a_ops
= &zpl_address_space_operations
;
458 zfs_set_inode_flags(znode_t
*zp
, struct inode
*ip
)
461 * Linux and Solaris have different sets of file attributes, so we
462 * restrict this conversion to the intersection of the two.
464 #ifdef HAVE_INODE_SET_FLAGS
465 unsigned int flags
= 0;
466 if (zp
->z_pflags
& ZFS_IMMUTABLE
)
467 flags
|= S_IMMUTABLE
;
468 if (zp
->z_pflags
& ZFS_APPENDONLY
)
471 inode_set_flags(ip
, flags
, S_IMMUTABLE
|S_APPEND
);
473 if (zp
->z_pflags
& ZFS_IMMUTABLE
)
474 ip
->i_flags
|= S_IMMUTABLE
;
476 ip
->i_flags
&= ~S_IMMUTABLE
;
478 if (zp
->z_pflags
& ZFS_APPENDONLY
)
479 ip
->i_flags
|= S_APPEND
;
481 ip
->i_flags
&= ~S_APPEND
;
486 * Update the embedded inode given the znode. We should work toward
487 * eliminating this function as soon as possible by removing values
488 * which are duplicated between the znode and inode. If the generic
489 * inode has the correct field it should be used, and the ZFS code
490 * updated to access the inode. This can be done incrementally.
493 zfs_inode_update(znode_t
*zp
)
498 u_longlong_t i_blocks
;
504 /* Skip .zfs control nodes which do not exist on disk. */
505 if (zfsctl_is_node(ip
))
508 dmu_object_size_from_db(sa_get_db(zp
->z_sa_hdl
), &blksize
, &i_blocks
);
510 spin_lock(&ip
->i_lock
);
511 ip
->i_blocks
= i_blocks
;
512 i_size_write(ip
, zp
->z_size
);
513 spin_unlock(&ip
->i_lock
);
518 * Construct a znode+inode and initialize.
520 * This does not do a call to dmu_set_user() that is
521 * up to the caller to do, in case you don't want to
525 zfs_znode_alloc(zfsvfs_t
*zfsvfs
, dmu_buf_t
*db
, int blksz
,
526 dmu_object_type_t obj_type
, uint64_t obj
, sa_handle_t
*hdl
)
534 uint64_t z_uid
, z_gid
;
535 uint64_t atime
[2], mtime
[2], ctime
[2];
536 uint64_t projid
= ZFS_DEFAULT_PROJID
;
537 sa_bulk_attr_t bulk
[11];
540 ASSERT(zfsvfs
!= NULL
);
542 ip
= new_inode(zfsvfs
->z_sb
);
547 ASSERT(zp
->z_dirlocks
== NULL
);
548 ASSERT3P(zp
->z_acl_cached
, ==, NULL
);
549 ASSERT3P(zp
->z_xattr_cached
, ==, NULL
);
553 zp
->z_atime_dirty
= 0;
555 zp
->z_id
= db
->db_object
;
557 zp
->z_seq
= 0x7A4653;
559 zp
->z_is_mapped
= B_FALSE
;
560 zp
->z_is_ctldir
= B_FALSE
;
561 zp
->z_is_stale
= B_FALSE
;
563 zfs_znode_sa_init(zfsvfs
, zp
, db
, obj_type
, hdl
);
565 SA_ADD_BULK_ATTR(bulk
, count
, SA_ZPL_MODE(zfsvfs
), NULL
, &mode
, 8);
566 SA_ADD_BULK_ATTR(bulk
, count
, SA_ZPL_GEN(zfsvfs
), NULL
, &tmp_gen
, 8);
567 SA_ADD_BULK_ATTR(bulk
, count
, SA_ZPL_SIZE(zfsvfs
), NULL
,
569 SA_ADD_BULK_ATTR(bulk
, count
, SA_ZPL_LINKS(zfsvfs
), NULL
, &links
, 8);
570 SA_ADD_BULK_ATTR(bulk
, count
, SA_ZPL_FLAGS(zfsvfs
), NULL
,
572 SA_ADD_BULK_ATTR(bulk
, count
, SA_ZPL_PARENT(zfsvfs
), NULL
,
574 SA_ADD_BULK_ATTR(bulk
, count
, SA_ZPL_UID(zfsvfs
), NULL
, &z_uid
, 8);
575 SA_ADD_BULK_ATTR(bulk
, count
, SA_ZPL_GID(zfsvfs
), NULL
, &z_gid
, 8);
576 SA_ADD_BULK_ATTR(bulk
, count
, SA_ZPL_ATIME(zfsvfs
), NULL
, &atime
, 16);
577 SA_ADD_BULK_ATTR(bulk
, count
, SA_ZPL_MTIME(zfsvfs
), NULL
, &mtime
, 16);
578 SA_ADD_BULK_ATTR(bulk
, count
, SA_ZPL_CTIME(zfsvfs
), NULL
, &ctime
, 16);
580 if (sa_bulk_lookup(zp
->z_sa_hdl
, bulk
, count
) != 0 || tmp_gen
== 0 ||
581 (dmu_objset_projectquota_enabled(zfsvfs
->z_os
) &&
582 (zp
->z_pflags
& ZFS_PROJID
) &&
583 sa_lookup(zp
->z_sa_hdl
, SA_ZPL_PROJID(zfsvfs
), &projid
, 8) != 0)) {
585 sa_handle_destroy(zp
->z_sa_hdl
);
590 zp
->z_projid
= projid
;
591 zp
->z_mode
= ip
->i_mode
= mode
;
592 ip
->i_generation
= (uint32_t)tmp_gen
;
593 ip
->i_blkbits
= SPA_MINBLOCKSHIFT
;
594 set_nlink(ip
, (uint32_t)links
);
595 zfs_uid_write(ip
, z_uid
);
596 zfs_gid_write(ip
, z_gid
);
597 zfs_set_inode_flags(zp
, ip
);
599 /* Cache the xattr parent id */
600 if (zp
->z_pflags
& ZFS_XATTR
)
601 zp
->z_xattr_parent
= parent
;
603 ZFS_TIME_DECODE(&ip
->i_atime
, atime
);
604 ZFS_TIME_DECODE(&ip
->i_mtime
, mtime
);
605 ZFS_TIME_DECODE(&ip
->i_ctime
, ctime
);
608 zfs_inode_update(zp
);
609 zfs_inode_set_ops(zfsvfs
, ip
);
612 * The only way insert_inode_locked() can fail is if the ip->i_ino
613 * number is already hashed for this super block. This can never
614 * happen because the inode numbers map 1:1 with the object numbers.
616 * The one exception is rolling back a mounted file system, but in
617 * this case all the active inode are unhashed during the rollback.
619 VERIFY3S(insert_inode_locked(ip
), ==, 0);
621 mutex_enter(&zfsvfs
->z_znodes_lock
);
622 list_insert_tail(&zfsvfs
->z_all_znodes
, zp
);
623 zfsvfs
->z_nr_znodes
++;
625 mutex_exit(&zfsvfs
->z_znodes_lock
);
627 unlock_new_inode(ip
);
636 * Safely mark an inode dirty. Inodes which are part of a read-only
637 * file system or snapshot may not be dirtied.
640 zfs_mark_inode_dirty(struct inode
*ip
)
642 zfsvfs_t
*zfsvfs
= ITOZSB(ip
);
644 if (zfs_is_readonly(zfsvfs
) || dmu_objset_is_snapshot(zfsvfs
->z_os
))
647 mark_inode_dirty(ip
);
650 static uint64_t empty_xattr
;
651 static uint64_t pad
[4];
652 static zfs_acl_phys_t acl_phys
;
654 * Create a new DMU object to hold a zfs znode.
656 * IN: dzp - parent directory for new znode
657 * vap - file attributes for new znode
658 * tx - dmu transaction id for zap operations
659 * cr - credentials of caller
661 * IS_ROOT_NODE - new object will be root
662 * IS_XATTR - new object is an attribute
663 * bonuslen - length of bonus buffer
664 * setaclp - File/Dir initial ACL
665 * fuidp - Tracks fuid allocation.
667 * OUT: zpp - allocated znode
671 zfs_mknode(znode_t
*dzp
, vattr_t
*vap
, dmu_tx_t
*tx
, cred_t
*cr
,
672 uint_t flag
, znode_t
**zpp
, zfs_acl_ids_t
*acl_ids
)
674 uint64_t crtime
[2], atime
[2], mtime
[2], ctime
[2];
675 uint64_t mode
, size
, links
, parent
, pflags
;
676 uint64_t projid
= ZFS_DEFAULT_PROJID
;
678 zfsvfs_t
*zfsvfs
= ZTOZSB(dzp
);
680 inode_timespec_t now
;
685 dmu_object_type_t obj_type
;
686 sa_bulk_attr_t
*sa_attrs
;
688 zfs_acl_locator_cb_t locate
= { 0 };
691 if (zfsvfs
->z_replay
) {
692 obj
= vap
->va_nodeid
;
693 now
= vap
->va_ctime
; /* see zfs_replay_create() */
694 gen
= vap
->va_nblocks
; /* ditto */
695 dnodesize
= vap
->va_fsid
; /* ditto */
699 gen
= dmu_tx_get_txg(tx
);
700 dnodesize
= dmu_objset_dnodesize(zfsvfs
->z_os
);
704 dnodesize
= DNODE_MIN_SIZE
;
706 obj_type
= zfsvfs
->z_use_sa
? DMU_OT_SA
: DMU_OT_ZNODE
;
708 bonuslen
= (obj_type
== DMU_OT_SA
) ?
709 DN_BONUS_SIZE(dnodesize
) : ZFS_OLD_ZNODE_PHYS_SIZE
;
712 * Create a new DMU object.
715 * There's currently no mechanism for pre-reading the blocks that will
716 * be needed to allocate a new object, so we accept the small chance
717 * that there will be an i/o error and we will fail one of the
720 if (S_ISDIR(vap
->va_mode
)) {
721 if (zfsvfs
->z_replay
) {
722 VERIFY0(zap_create_claim_norm_dnsize(zfsvfs
->z_os
, obj
,
723 zfsvfs
->z_norm
, DMU_OT_DIRECTORY_CONTENTS
,
724 obj_type
, bonuslen
, dnodesize
, tx
));
726 obj
= zap_create_norm_dnsize(zfsvfs
->z_os
,
727 zfsvfs
->z_norm
, DMU_OT_DIRECTORY_CONTENTS
,
728 obj_type
, bonuslen
, dnodesize
, tx
);
731 if (zfsvfs
->z_replay
) {
732 VERIFY0(dmu_object_claim_dnsize(zfsvfs
->z_os
, obj
,
733 DMU_OT_PLAIN_FILE_CONTENTS
, 0,
734 obj_type
, bonuslen
, dnodesize
, tx
));
736 obj
= dmu_object_alloc_dnsize(zfsvfs
->z_os
,
737 DMU_OT_PLAIN_FILE_CONTENTS
, 0,
738 obj_type
, bonuslen
, dnodesize
, tx
);
742 zh
= zfs_znode_hold_enter(zfsvfs
, obj
);
743 VERIFY0(sa_buf_hold(zfsvfs
->z_os
, obj
, NULL
, &db
));
746 * If this is the root, fix up the half-initialized parent pointer
747 * to reference the just-allocated physical data area.
749 if (flag
& IS_ROOT_NODE
) {
754 * If parent is an xattr, so am I.
756 if (dzp
->z_pflags
& ZFS_XATTR
) {
760 if (zfsvfs
->z_use_fuids
)
761 pflags
= ZFS_ARCHIVE
| ZFS_AV_MODIFIED
;
765 if (S_ISDIR(vap
->va_mode
)) {
766 size
= 2; /* contents ("." and "..") */
770 links
= (flag
& IS_TMPFILE
) ? 0 : 1;
773 if (S_ISBLK(vap
->va_mode
) || S_ISCHR(vap
->va_mode
))
777 mode
= acl_ids
->z_mode
;
781 if (S_ISREG(vap
->va_mode
) || S_ISDIR(vap
->va_mode
)) {
783 * With ZFS_PROJID flag, we can easily know whether there is
784 * project ID stored on disk or not. See zfs_space_delta_cb().
786 if (obj_type
!= DMU_OT_ZNODE
&&
787 dmu_objset_projectquota_enabled(zfsvfs
->z_os
))
788 pflags
|= ZFS_PROJID
;
791 * Inherit project ID from parent if required.
793 projid
= zfs_inherit_projid(dzp
);
794 if (dzp
->z_pflags
& ZFS_PROJINHERIT
)
795 pflags
|= ZFS_PROJINHERIT
;
799 * No execs denied will be deterimed when zfs_mode_compute() is called.
801 pflags
|= acl_ids
->z_aclp
->z_hints
&
802 (ZFS_ACL_TRIVIAL
|ZFS_INHERIT_ACE
|ZFS_ACL_AUTO_INHERIT
|
803 ZFS_ACL_DEFAULTED
|ZFS_ACL_PROTECTED
);
805 ZFS_TIME_ENCODE(&now
, crtime
);
806 ZFS_TIME_ENCODE(&now
, ctime
);
808 if (vap
->va_mask
& ATTR_ATIME
) {
809 ZFS_TIME_ENCODE(&vap
->va_atime
, atime
);
811 ZFS_TIME_ENCODE(&now
, atime
);
814 if (vap
->va_mask
& ATTR_MTIME
) {
815 ZFS_TIME_ENCODE(&vap
->va_mtime
, mtime
);
817 ZFS_TIME_ENCODE(&now
, mtime
);
820 /* Now add in all of the "SA" attributes */
821 VERIFY(0 == sa_handle_get_from_db(zfsvfs
->z_os
, db
, NULL
, SA_HDL_SHARED
,
825 * Setup the array of attributes to be replaced/set on the new file
827 * order for DMU_OT_ZNODE is critical since it needs to be constructed
828 * in the old znode_phys_t format. Don't change this ordering
830 sa_attrs
= kmem_alloc(sizeof (sa_bulk_attr_t
) * ZPL_END
, KM_SLEEP
);
832 if (obj_type
== DMU_OT_ZNODE
) {
833 SA_ADD_BULK_ATTR(sa_attrs
, cnt
, SA_ZPL_ATIME(zfsvfs
),
835 SA_ADD_BULK_ATTR(sa_attrs
, cnt
, SA_ZPL_MTIME(zfsvfs
),
837 SA_ADD_BULK_ATTR(sa_attrs
, cnt
, SA_ZPL_CTIME(zfsvfs
),
839 SA_ADD_BULK_ATTR(sa_attrs
, cnt
, SA_ZPL_CRTIME(zfsvfs
),
841 SA_ADD_BULK_ATTR(sa_attrs
, cnt
, SA_ZPL_GEN(zfsvfs
),
843 SA_ADD_BULK_ATTR(sa_attrs
, cnt
, SA_ZPL_MODE(zfsvfs
),
845 SA_ADD_BULK_ATTR(sa_attrs
, cnt
, SA_ZPL_SIZE(zfsvfs
),
847 SA_ADD_BULK_ATTR(sa_attrs
, cnt
, SA_ZPL_PARENT(zfsvfs
),
850 SA_ADD_BULK_ATTR(sa_attrs
, cnt
, SA_ZPL_MODE(zfsvfs
),
852 SA_ADD_BULK_ATTR(sa_attrs
, cnt
, SA_ZPL_SIZE(zfsvfs
),
854 SA_ADD_BULK_ATTR(sa_attrs
, cnt
, SA_ZPL_GEN(zfsvfs
),
856 SA_ADD_BULK_ATTR(sa_attrs
, cnt
, SA_ZPL_UID(zfsvfs
),
857 NULL
, &acl_ids
->z_fuid
, 8);
858 SA_ADD_BULK_ATTR(sa_attrs
, cnt
, SA_ZPL_GID(zfsvfs
),
859 NULL
, &acl_ids
->z_fgid
, 8);
860 SA_ADD_BULK_ATTR(sa_attrs
, cnt
, SA_ZPL_PARENT(zfsvfs
),
862 SA_ADD_BULK_ATTR(sa_attrs
, cnt
, SA_ZPL_FLAGS(zfsvfs
),
864 SA_ADD_BULK_ATTR(sa_attrs
, cnt
, SA_ZPL_ATIME(zfsvfs
),
866 SA_ADD_BULK_ATTR(sa_attrs
, cnt
, SA_ZPL_MTIME(zfsvfs
),
868 SA_ADD_BULK_ATTR(sa_attrs
, cnt
, SA_ZPL_CTIME(zfsvfs
),
870 SA_ADD_BULK_ATTR(sa_attrs
, cnt
, SA_ZPL_CRTIME(zfsvfs
),
874 SA_ADD_BULK_ATTR(sa_attrs
, cnt
, SA_ZPL_LINKS(zfsvfs
), NULL
, &links
, 8);
876 if (obj_type
== DMU_OT_ZNODE
) {
877 SA_ADD_BULK_ATTR(sa_attrs
, cnt
, SA_ZPL_XATTR(zfsvfs
), NULL
,
879 } else if (dmu_objset_projectquota_enabled(zfsvfs
->z_os
) &&
880 pflags
& ZFS_PROJID
) {
881 SA_ADD_BULK_ATTR(sa_attrs
, cnt
, SA_ZPL_PROJID(zfsvfs
),
884 if (obj_type
== DMU_OT_ZNODE
||
885 (S_ISBLK(vap
->va_mode
) || S_ISCHR(vap
->va_mode
))) {
886 SA_ADD_BULK_ATTR(sa_attrs
, cnt
, SA_ZPL_RDEV(zfsvfs
),
889 if (obj_type
== DMU_OT_ZNODE
) {
890 SA_ADD_BULK_ATTR(sa_attrs
, cnt
, SA_ZPL_FLAGS(zfsvfs
),
892 SA_ADD_BULK_ATTR(sa_attrs
, cnt
, SA_ZPL_UID(zfsvfs
), NULL
,
893 &acl_ids
->z_fuid
, 8);
894 SA_ADD_BULK_ATTR(sa_attrs
, cnt
, SA_ZPL_GID(zfsvfs
), NULL
,
895 &acl_ids
->z_fgid
, 8);
896 SA_ADD_BULK_ATTR(sa_attrs
, cnt
, SA_ZPL_PAD(zfsvfs
), NULL
, pad
,
897 sizeof (uint64_t) * 4);
898 SA_ADD_BULK_ATTR(sa_attrs
, cnt
, SA_ZPL_ZNODE_ACL(zfsvfs
), NULL
,
899 &acl_phys
, sizeof (zfs_acl_phys_t
));
900 } else if (acl_ids
->z_aclp
->z_version
>= ZFS_ACL_VERSION_FUID
) {
901 SA_ADD_BULK_ATTR(sa_attrs
, cnt
, SA_ZPL_DACL_COUNT(zfsvfs
), NULL
,
902 &acl_ids
->z_aclp
->z_acl_count
, 8);
903 locate
.cb_aclp
= acl_ids
->z_aclp
;
904 SA_ADD_BULK_ATTR(sa_attrs
, cnt
, SA_ZPL_DACL_ACES(zfsvfs
),
905 zfs_acl_data_locator
, &locate
,
906 acl_ids
->z_aclp
->z_acl_bytes
);
907 mode
= zfs_mode_compute(mode
, acl_ids
->z_aclp
, &pflags
,
908 acl_ids
->z_fuid
, acl_ids
->z_fgid
);
911 VERIFY(sa_replace_all_by_template(sa_hdl
, sa_attrs
, cnt
, tx
) == 0);
913 if (!(flag
& IS_ROOT_NODE
)) {
915 * The call to zfs_znode_alloc() may fail if memory is low
916 * via the call path: alloc_inode() -> inode_init_always() ->
917 * security_inode_alloc() -> inode_alloc_security(). Since
918 * the existing code is written such that zfs_mknode() can
919 * not fail retry until sufficient memory has been reclaimed.
922 *zpp
= zfs_znode_alloc(zfsvfs
, db
, 0, obj_type
, obj
,
924 } while (*zpp
== NULL
);
926 VERIFY(*zpp
!= NULL
);
930 * If we are creating the root node, the "parent" we
931 * passed in is the znode for the root.
935 (*zpp
)->z_sa_hdl
= sa_hdl
;
938 (*zpp
)->z_pflags
= pflags
;
939 (*zpp
)->z_mode
= ZTOI(*zpp
)->i_mode
= mode
;
940 (*zpp
)->z_dnodesize
= dnodesize
;
941 (*zpp
)->z_projid
= projid
;
943 if (obj_type
== DMU_OT_ZNODE
||
944 acl_ids
->z_aclp
->z_version
< ZFS_ACL_VERSION_FUID
) {
945 VERIFY0(zfs_aclset_common(*zpp
, acl_ids
->z_aclp
, cr
, tx
));
947 kmem_free(sa_attrs
, sizeof (sa_bulk_attr_t
) * ZPL_END
);
948 zfs_znode_hold_exit(zfsvfs
, zh
);
952 * Update in-core attributes. It is assumed the caller will be doing an
953 * sa_bulk_update to push the changes out.
956 zfs_xvattr_set(znode_t
*zp
, xvattr_t
*xvap
, dmu_tx_t
*tx
)
959 boolean_t update_inode
= B_FALSE
;
961 xoap
= xva_getxoptattr(xvap
);
964 if (XVA_ISSET_REQ(xvap
, XAT_CREATETIME
)) {
966 ZFS_TIME_ENCODE(&xoap
->xoa_createtime
, times
);
967 (void) sa_update(zp
->z_sa_hdl
, SA_ZPL_CRTIME(ZTOZSB(zp
)),
968 ×
, sizeof (times
), tx
);
969 XVA_SET_RTN(xvap
, XAT_CREATETIME
);
971 if (XVA_ISSET_REQ(xvap
, XAT_READONLY
)) {
972 ZFS_ATTR_SET(zp
, ZFS_READONLY
, xoap
->xoa_readonly
,
974 XVA_SET_RTN(xvap
, XAT_READONLY
);
976 if (XVA_ISSET_REQ(xvap
, XAT_HIDDEN
)) {
977 ZFS_ATTR_SET(zp
, ZFS_HIDDEN
, xoap
->xoa_hidden
,
979 XVA_SET_RTN(xvap
, XAT_HIDDEN
);
981 if (XVA_ISSET_REQ(xvap
, XAT_SYSTEM
)) {
982 ZFS_ATTR_SET(zp
, ZFS_SYSTEM
, xoap
->xoa_system
,
984 XVA_SET_RTN(xvap
, XAT_SYSTEM
);
986 if (XVA_ISSET_REQ(xvap
, XAT_ARCHIVE
)) {
987 ZFS_ATTR_SET(zp
, ZFS_ARCHIVE
, xoap
->xoa_archive
,
989 XVA_SET_RTN(xvap
, XAT_ARCHIVE
);
991 if (XVA_ISSET_REQ(xvap
, XAT_IMMUTABLE
)) {
992 ZFS_ATTR_SET(zp
, ZFS_IMMUTABLE
, xoap
->xoa_immutable
,
994 XVA_SET_RTN(xvap
, XAT_IMMUTABLE
);
996 update_inode
= B_TRUE
;
998 if (XVA_ISSET_REQ(xvap
, XAT_NOUNLINK
)) {
999 ZFS_ATTR_SET(zp
, ZFS_NOUNLINK
, xoap
->xoa_nounlink
,
1001 XVA_SET_RTN(xvap
, XAT_NOUNLINK
);
1003 if (XVA_ISSET_REQ(xvap
, XAT_APPENDONLY
)) {
1004 ZFS_ATTR_SET(zp
, ZFS_APPENDONLY
, xoap
->xoa_appendonly
,
1006 XVA_SET_RTN(xvap
, XAT_APPENDONLY
);
1008 update_inode
= B_TRUE
;
1010 if (XVA_ISSET_REQ(xvap
, XAT_NODUMP
)) {
1011 ZFS_ATTR_SET(zp
, ZFS_NODUMP
, xoap
->xoa_nodump
,
1013 XVA_SET_RTN(xvap
, XAT_NODUMP
);
1015 if (XVA_ISSET_REQ(xvap
, XAT_OPAQUE
)) {
1016 ZFS_ATTR_SET(zp
, ZFS_OPAQUE
, xoap
->xoa_opaque
,
1018 XVA_SET_RTN(xvap
, XAT_OPAQUE
);
1020 if (XVA_ISSET_REQ(xvap
, XAT_AV_QUARANTINED
)) {
1021 ZFS_ATTR_SET(zp
, ZFS_AV_QUARANTINED
,
1022 xoap
->xoa_av_quarantined
, zp
->z_pflags
, tx
);
1023 XVA_SET_RTN(xvap
, XAT_AV_QUARANTINED
);
1025 if (XVA_ISSET_REQ(xvap
, XAT_AV_MODIFIED
)) {
1026 ZFS_ATTR_SET(zp
, ZFS_AV_MODIFIED
, xoap
->xoa_av_modified
,
1028 XVA_SET_RTN(xvap
, XAT_AV_MODIFIED
);
1030 if (XVA_ISSET_REQ(xvap
, XAT_AV_SCANSTAMP
)) {
1031 zfs_sa_set_scanstamp(zp
, xvap
, tx
);
1032 XVA_SET_RTN(xvap
, XAT_AV_SCANSTAMP
);
1034 if (XVA_ISSET_REQ(xvap
, XAT_REPARSE
)) {
1035 ZFS_ATTR_SET(zp
, ZFS_REPARSE
, xoap
->xoa_reparse
,
1037 XVA_SET_RTN(xvap
, XAT_REPARSE
);
1039 if (XVA_ISSET_REQ(xvap
, XAT_OFFLINE
)) {
1040 ZFS_ATTR_SET(zp
, ZFS_OFFLINE
, xoap
->xoa_offline
,
1042 XVA_SET_RTN(xvap
, XAT_OFFLINE
);
1044 if (XVA_ISSET_REQ(xvap
, XAT_SPARSE
)) {
1045 ZFS_ATTR_SET(zp
, ZFS_SPARSE
, xoap
->xoa_sparse
,
1047 XVA_SET_RTN(xvap
, XAT_SPARSE
);
1049 if (XVA_ISSET_REQ(xvap
, XAT_PROJINHERIT
)) {
1050 ZFS_ATTR_SET(zp
, ZFS_PROJINHERIT
, xoap
->xoa_projinherit
,
1052 XVA_SET_RTN(xvap
, XAT_PROJINHERIT
);
1056 zfs_set_inode_flags(zp
, ZTOI(zp
));
1060 zfs_zget(zfsvfs_t
*zfsvfs
, uint64_t obj_num
, znode_t
**zpp
)
1062 dmu_object_info_t doi
;
1072 zh
= zfs_znode_hold_enter(zfsvfs
, obj_num
);
1074 err
= sa_buf_hold(zfsvfs
->z_os
, obj_num
, NULL
, &db
);
1076 zfs_znode_hold_exit(zfsvfs
, zh
);
1080 dmu_object_info_from_db(db
, &doi
);
1081 if (doi
.doi_bonus_type
!= DMU_OT_SA
&&
1082 (doi
.doi_bonus_type
!= DMU_OT_ZNODE
||
1083 (doi
.doi_bonus_type
== DMU_OT_ZNODE
&&
1084 doi
.doi_bonus_size
< sizeof (znode_phys_t
)))) {
1085 sa_buf_rele(db
, NULL
);
1086 zfs_znode_hold_exit(zfsvfs
, zh
);
1087 return (SET_ERROR(EINVAL
));
1090 hdl
= dmu_buf_get_user(db
);
1092 zp
= sa_get_userdata(hdl
);
1096 * Since "SA" does immediate eviction we
1097 * should never find a sa handle that doesn't
1098 * know about the znode.
1101 ASSERT3P(zp
, !=, NULL
);
1103 mutex_enter(&zp
->z_lock
);
1104 ASSERT3U(zp
->z_id
, ==, obj_num
);
1106 * If igrab() returns NULL the VFS has independently
1107 * determined the inode should be evicted and has
1108 * called iput_final() to start the eviction process.
1109 * The SA handle is still valid but because the VFS
1110 * requires that the eviction succeed we must drop
1111 * our locks and references to allow the eviction to
1112 * complete. The zfs_zget() may then be retried.
1114 * This unlikely case could be optimized by registering
1115 * a sops->drop_inode() callback. The callback would
1116 * need to detect the active SA hold thereby informing
1117 * the VFS that this inode should not be evicted.
1119 if (igrab(ZTOI(zp
)) == NULL
) {
1120 mutex_exit(&zp
->z_lock
);
1121 sa_buf_rele(db
, NULL
);
1122 zfs_znode_hold_exit(zfsvfs
, zh
);
1123 /* inode might need this to finish evict */
1129 mutex_exit(&zp
->z_lock
);
1130 sa_buf_rele(db
, NULL
);
1131 zfs_znode_hold_exit(zfsvfs
, zh
);
1136 * Not found create new znode/vnode but only if file exists.
1138 * There is a small window where zfs_vget() could
1139 * find this object while a file create is still in
1140 * progress. This is checked for in zfs_znode_alloc()
1142 * if zfs_znode_alloc() fails it will drop the hold on the
1145 zp
= zfs_znode_alloc(zfsvfs
, db
, doi
.doi_data_block_size
,
1146 doi
.doi_bonus_type
, obj_num
, NULL
);
1148 err
= SET_ERROR(ENOENT
);
1152 zfs_znode_hold_exit(zfsvfs
, zh
);
1157 zfs_rezget(znode_t
*zp
)
1159 zfsvfs_t
*zfsvfs
= ZTOZSB(zp
);
1160 dmu_object_info_t doi
;
1162 uint64_t obj_num
= zp
->z_id
;
1165 sa_bulk_attr_t bulk
[10];
1169 uint64_t z_uid
, z_gid
;
1170 uint64_t atime
[2], mtime
[2], ctime
[2];
1171 uint64_t projid
= ZFS_DEFAULT_PROJID
;
1175 * skip ctldir, otherwise they will always get invalidated. This will
1176 * cause funny behaviour for the mounted snapdirs. Especially for
1177 * Linux >= 3.18, d_invalidate will detach the mountpoint and prevent
1178 * anyone automount it again as long as someone is still using the
1181 if (zp
->z_is_ctldir
)
1184 zh
= zfs_znode_hold_enter(zfsvfs
, obj_num
);
1186 mutex_enter(&zp
->z_acl_lock
);
1187 if (zp
->z_acl_cached
) {
1188 zfs_acl_free(zp
->z_acl_cached
);
1189 zp
->z_acl_cached
= NULL
;
1191 mutex_exit(&zp
->z_acl_lock
);
1193 rw_enter(&zp
->z_xattr_lock
, RW_WRITER
);
1194 if (zp
->z_xattr_cached
) {
1195 nvlist_free(zp
->z_xattr_cached
);
1196 zp
->z_xattr_cached
= NULL
;
1198 rw_exit(&zp
->z_xattr_lock
);
1200 ASSERT(zp
->z_sa_hdl
== NULL
);
1201 err
= sa_buf_hold(zfsvfs
->z_os
, obj_num
, NULL
, &db
);
1203 zfs_znode_hold_exit(zfsvfs
, zh
);
1207 dmu_object_info_from_db(db
, &doi
);
1208 if (doi
.doi_bonus_type
!= DMU_OT_SA
&&
1209 (doi
.doi_bonus_type
!= DMU_OT_ZNODE
||
1210 (doi
.doi_bonus_type
== DMU_OT_ZNODE
&&
1211 doi
.doi_bonus_size
< sizeof (znode_phys_t
)))) {
1212 sa_buf_rele(db
, NULL
);
1213 zfs_znode_hold_exit(zfsvfs
, zh
);
1214 return (SET_ERROR(EINVAL
));
1217 zfs_znode_sa_init(zfsvfs
, zp
, db
, doi
.doi_bonus_type
, NULL
);
1219 /* reload cached values */
1220 SA_ADD_BULK_ATTR(bulk
, count
, SA_ZPL_GEN(zfsvfs
), NULL
,
1221 &gen
, sizeof (gen
));
1222 SA_ADD_BULK_ATTR(bulk
, count
, SA_ZPL_SIZE(zfsvfs
), NULL
,
1223 &zp
->z_size
, sizeof (zp
->z_size
));
1224 SA_ADD_BULK_ATTR(bulk
, count
, SA_ZPL_LINKS(zfsvfs
), NULL
,
1225 &links
, sizeof (links
));
1226 SA_ADD_BULK_ATTR(bulk
, count
, SA_ZPL_FLAGS(zfsvfs
), NULL
,
1227 &zp
->z_pflags
, sizeof (zp
->z_pflags
));
1228 SA_ADD_BULK_ATTR(bulk
, count
, SA_ZPL_UID(zfsvfs
), NULL
,
1229 &z_uid
, sizeof (z_uid
));
1230 SA_ADD_BULK_ATTR(bulk
, count
, SA_ZPL_GID(zfsvfs
), NULL
,
1231 &z_gid
, sizeof (z_gid
));
1232 SA_ADD_BULK_ATTR(bulk
, count
, SA_ZPL_MODE(zfsvfs
), NULL
,
1233 &mode
, sizeof (mode
));
1234 SA_ADD_BULK_ATTR(bulk
, count
, SA_ZPL_ATIME(zfsvfs
), NULL
,
1236 SA_ADD_BULK_ATTR(bulk
, count
, SA_ZPL_MTIME(zfsvfs
), NULL
,
1238 SA_ADD_BULK_ATTR(bulk
, count
, SA_ZPL_CTIME(zfsvfs
), NULL
,
1241 if (sa_bulk_lookup(zp
->z_sa_hdl
, bulk
, count
)) {
1242 zfs_znode_dmu_fini(zp
);
1243 zfs_znode_hold_exit(zfsvfs
, zh
);
1244 return (SET_ERROR(EIO
));
1247 if (dmu_objset_projectquota_enabled(zfsvfs
->z_os
)) {
1248 err
= sa_lookup(zp
->z_sa_hdl
, SA_ZPL_PROJID(zfsvfs
),
1250 if (err
!= 0 && err
!= ENOENT
) {
1251 zfs_znode_dmu_fini(zp
);
1252 zfs_znode_hold_exit(zfsvfs
, zh
);
1253 return (SET_ERROR(err
));
1257 zp
->z_projid
= projid
;
1258 zp
->z_mode
= ZTOI(zp
)->i_mode
= mode
;
1259 zfs_uid_write(ZTOI(zp
), z_uid
);
1260 zfs_gid_write(ZTOI(zp
), z_gid
);
1262 ZFS_TIME_DECODE(&ZTOI(zp
)->i_atime
, atime
);
1263 ZFS_TIME_DECODE(&ZTOI(zp
)->i_mtime
, mtime
);
1264 ZFS_TIME_DECODE(&ZTOI(zp
)->i_ctime
, ctime
);
1266 if (gen
!= ZTOI(zp
)->i_generation
) {
1267 zfs_znode_dmu_fini(zp
);
1268 zfs_znode_hold_exit(zfsvfs
, zh
);
1269 return (SET_ERROR(EIO
));
1272 set_nlink(ZTOI(zp
), (uint32_t)links
);
1273 zfs_set_inode_flags(zp
, ZTOI(zp
));
1275 zp
->z_blksz
= doi
.doi_data_block_size
;
1276 zp
->z_atime_dirty
= 0;
1277 zfs_inode_update(zp
);
1280 * If the file has zero links, then it has been unlinked on the send
1281 * side and it must be in the received unlinked set.
1282 * We call zfs_znode_dmu_fini() now to prevent any accesses to the
1283 * stale data and to prevent automatical removal of the file in
1284 * zfs_zinactive(). The file will be removed either when it is removed
1285 * on the send side and the next incremental stream is received or
1286 * when the unlinked set gets processed.
1288 zp
->z_unlinked
= (ZTOI(zp
)->i_nlink
== 0);
1290 zfs_znode_dmu_fini(zp
);
1292 zfs_znode_hold_exit(zfsvfs
, zh
);
1298 zfs_znode_delete(znode_t
*zp
, dmu_tx_t
*tx
)
1300 zfsvfs_t
*zfsvfs
= ZTOZSB(zp
);
1301 objset_t
*os
= zfsvfs
->z_os
;
1302 uint64_t obj
= zp
->z_id
;
1303 uint64_t acl_obj
= zfs_external_acl(zp
);
1306 zh
= zfs_znode_hold_enter(zfsvfs
, obj
);
1308 VERIFY(!zp
->z_is_sa
);
1309 VERIFY(0 == dmu_object_free(os
, acl_obj
, tx
));
1311 VERIFY(0 == dmu_object_free(os
, obj
, tx
));
1312 zfs_znode_dmu_fini(zp
);
1313 zfs_znode_hold_exit(zfsvfs
, zh
);
1317 zfs_zinactive(znode_t
*zp
)
1319 zfsvfs_t
*zfsvfs
= ZTOZSB(zp
);
1320 uint64_t z_id
= zp
->z_id
;
1323 ASSERT(zp
->z_sa_hdl
);
1326 * Don't allow a zfs_zget() while were trying to release this znode.
1328 zh
= zfs_znode_hold_enter(zfsvfs
, z_id
);
1330 mutex_enter(&zp
->z_lock
);
1333 * If this was the last reference to a file with no links, remove
1334 * the file from the file system unless the file system is mounted
1335 * read-only. That can happen, for example, if the file system was
1336 * originally read-write, the file was opened, then unlinked and
1337 * the file system was made read-only before the file was finally
1338 * closed. The file will remain in the unlinked set.
1340 if (zp
->z_unlinked
) {
1341 ASSERT(!zfsvfs
->z_issnap
);
1342 if (!zfs_is_readonly(zfsvfs
)) {
1343 mutex_exit(&zp
->z_lock
);
1344 zfs_znode_hold_exit(zfsvfs
, zh
);
1350 mutex_exit(&zp
->z_lock
);
1351 zfs_znode_dmu_fini(zp
);
1353 zfs_znode_hold_exit(zfsvfs
, zh
);
1357 zfs_compare_timespec(struct timespec
*t1
, struct timespec
*t2
)
1359 if (t1
->tv_sec
< t2
->tv_sec
)
1362 if (t1
->tv_sec
> t2
->tv_sec
)
1365 return (t1
->tv_nsec
- t2
->tv_nsec
);
1369 * Prepare to update znode time stamps.
1371 * IN: zp - znode requiring timestamp update
1372 * flag - ATTR_MTIME, ATTR_CTIME flags
1378 * Note: We don't update atime here, because we rely on Linux VFS to do
1382 zfs_tstamp_update_setup(znode_t
*zp
, uint_t flag
, uint64_t mtime
[2],
1385 inode_timespec_t now
;
1391 if (flag
& ATTR_MTIME
) {
1392 ZFS_TIME_ENCODE(&now
, mtime
);
1393 ZFS_TIME_DECODE(&(ZTOI(zp
)->i_mtime
), mtime
);
1394 if (ZTOZSB(zp
)->z_use_fuids
) {
1395 zp
->z_pflags
|= (ZFS_ARCHIVE
|
1400 if (flag
& ATTR_CTIME
) {
1401 ZFS_TIME_ENCODE(&now
, ctime
);
1402 ZFS_TIME_DECODE(&(ZTOI(zp
)->i_ctime
), ctime
);
1403 if (ZTOZSB(zp
)->z_use_fuids
)
1404 zp
->z_pflags
|= ZFS_ARCHIVE
;
1409 * Grow the block size for a file.
1411 * IN: zp - znode of file to free data in.
1412 * size - requested block size
1413 * tx - open transaction.
1415 * NOTE: this function assumes that the znode is write locked.
1418 zfs_grow_blocksize(znode_t
*zp
, uint64_t size
, dmu_tx_t
*tx
)
1423 if (size
<= zp
->z_blksz
)
1426 * If the file size is already greater than the current blocksize,
1427 * we will not grow. If there is more than one block in a file,
1428 * the blocksize cannot change.
1430 if (zp
->z_blksz
&& zp
->z_size
> zp
->z_blksz
)
1433 error
= dmu_object_set_blocksize(ZTOZSB(zp
)->z_os
, zp
->z_id
,
1436 if (error
== ENOTSUP
)
1440 /* What blocksize did we actually get? */
1441 dmu_object_size_from_db(sa_get_db(zp
->z_sa_hdl
), &zp
->z_blksz
, &dummy
);
1445 * Increase the file length
1447 * IN: zp - znode of file to free data in.
1448 * end - new end-of-file
1450 * RETURN: 0 on success, error code on failure
1453 zfs_extend(znode_t
*zp
, uint64_t end
)
1455 zfsvfs_t
*zfsvfs
= ZTOZSB(zp
);
1462 * We will change zp_size, lock the whole file.
1464 lr
= rangelock_enter(&zp
->z_rangelock
, 0, UINT64_MAX
, RL_WRITER
);
1467 * Nothing to do if file already at desired length.
1469 if (end
<= zp
->z_size
) {
1473 tx
= dmu_tx_create(zfsvfs
->z_os
);
1474 dmu_tx_hold_sa(tx
, zp
->z_sa_hdl
, B_FALSE
);
1475 zfs_sa_upgrade_txholds(tx
, zp
);
1476 if (end
> zp
->z_blksz
&&
1477 (!ISP2(zp
->z_blksz
) || zp
->z_blksz
< zfsvfs
->z_max_blksz
)) {
1479 * We are growing the file past the current block size.
1481 if (zp
->z_blksz
> ZTOZSB(zp
)->z_max_blksz
) {
1483 * File's blocksize is already larger than the
1484 * "recordsize" property. Only let it grow to
1485 * the next power of 2.
1487 ASSERT(!ISP2(zp
->z_blksz
));
1488 newblksz
= MIN(end
, 1 << highbit64(zp
->z_blksz
));
1490 newblksz
= MIN(end
, ZTOZSB(zp
)->z_max_blksz
);
1492 dmu_tx_hold_write(tx
, zp
->z_id
, 0, newblksz
);
1497 error
= dmu_tx_assign(tx
, TXG_WAIT
);
1505 zfs_grow_blocksize(zp
, newblksz
, tx
);
1509 VERIFY(0 == sa_update(zp
->z_sa_hdl
, SA_ZPL_SIZE(ZTOZSB(zp
)),
1510 &zp
->z_size
, sizeof (zp
->z_size
), tx
));
1520 * zfs_zero_partial_page - Modeled after update_pages() but
1521 * with different arguments and semantics for use by zfs_freesp().
1523 * Zeroes a piece of a single page cache entry for zp at offset
1524 * start and length len.
1526 * Caller must acquire a range lock on the file for the region
1527 * being zeroed in order that the ARC and page cache stay in sync.
1530 zfs_zero_partial_page(znode_t
*zp
, uint64_t start
, uint64_t len
)
1532 struct address_space
*mp
= ZTOI(zp
)->i_mapping
;
1537 ASSERT((start
& PAGE_MASK
) == ((start
+ len
- 1) & PAGE_MASK
));
1539 off
= start
& (PAGE_SIZE
- 1);
1542 pp
= find_lock_page(mp
, start
>> PAGE_SHIFT
);
1544 if (mapping_writably_mapped(mp
))
1545 flush_dcache_page(pp
);
1548 bzero(pb
+ off
, len
);
1551 if (mapping_writably_mapped(mp
))
1552 flush_dcache_page(pp
);
1554 mark_page_accessed(pp
);
1555 SetPageUptodate(pp
);
1563 * Free space in a file.
1565 * IN: zp - znode of file to free data in.
1566 * off - start of section to free.
1567 * len - length of section to free.
1569 * RETURN: 0 on success, error code on failure
1572 zfs_free_range(znode_t
*zp
, uint64_t off
, uint64_t len
)
1574 zfsvfs_t
*zfsvfs
= ZTOZSB(zp
);
1579 * Lock the range being freed.
1581 lr
= rangelock_enter(&zp
->z_rangelock
, off
, len
, RL_WRITER
);
1584 * Nothing to do if file already at desired length.
1586 if (off
>= zp
->z_size
) {
1591 if (off
+ len
> zp
->z_size
)
1592 len
= zp
->z_size
- off
;
1594 error
= dmu_free_long_range(zfsvfs
->z_os
, zp
->z_id
, off
, len
);
1597 * Zero partial page cache entries. This must be done under a
1598 * range lock in order to keep the ARC and page cache in sync.
1600 if (zp
->z_is_mapped
) {
1601 loff_t first_page
, last_page
, page_len
;
1602 loff_t first_page_offset
, last_page_offset
;
1604 /* first possible full page in hole */
1605 first_page
= (off
+ PAGE_SIZE
- 1) >> PAGE_SHIFT
;
1606 /* last page of hole */
1607 last_page
= (off
+ len
) >> PAGE_SHIFT
;
1609 /* offset of first_page */
1610 first_page_offset
= first_page
<< PAGE_SHIFT
;
1611 /* offset of last_page */
1612 last_page_offset
= last_page
<< PAGE_SHIFT
;
1614 /* truncate whole pages */
1615 if (last_page_offset
> first_page_offset
) {
1616 truncate_inode_pages_range(ZTOI(zp
)->i_mapping
,
1617 first_page_offset
, last_page_offset
- 1);
1620 /* truncate sub-page ranges */
1621 if (first_page
> last_page
) {
1622 /* entire punched area within a single page */
1623 zfs_zero_partial_page(zp
, off
, len
);
1625 /* beginning of punched area at the end of a page */
1626 page_len
= first_page_offset
- off
;
1628 zfs_zero_partial_page(zp
, off
, page_len
);
1630 /* end of punched area at the beginning of a page */
1631 page_len
= off
+ len
- last_page_offset
;
1633 zfs_zero_partial_page(zp
, last_page_offset
,
1645 * IN: zp - znode of file to free data in.
1646 * end - new end-of-file.
1648 * RETURN: 0 on success, error code on failure
1651 zfs_trunc(znode_t
*zp
, uint64_t end
)
1653 zfsvfs_t
*zfsvfs
= ZTOZSB(zp
);
1657 sa_bulk_attr_t bulk
[2];
1661 * We will change zp_size, lock the whole file.
1663 lr
= rangelock_enter(&zp
->z_rangelock
, 0, UINT64_MAX
, RL_WRITER
);
1666 * Nothing to do if file already at desired length.
1668 if (end
>= zp
->z_size
) {
1673 error
= dmu_free_long_range(zfsvfs
->z_os
, zp
->z_id
, end
,
1679 tx
= dmu_tx_create(zfsvfs
->z_os
);
1680 dmu_tx_hold_sa(tx
, zp
->z_sa_hdl
, B_FALSE
);
1681 zfs_sa_upgrade_txholds(tx
, zp
);
1682 dmu_tx_mark_netfree(tx
);
1683 error
= dmu_tx_assign(tx
, TXG_WAIT
);
1691 SA_ADD_BULK_ATTR(bulk
, count
, SA_ZPL_SIZE(zfsvfs
),
1692 NULL
, &zp
->z_size
, sizeof (zp
->z_size
));
1695 zp
->z_pflags
&= ~ZFS_SPARSE
;
1696 SA_ADD_BULK_ATTR(bulk
, count
, SA_ZPL_FLAGS(zfsvfs
),
1697 NULL
, &zp
->z_pflags
, 8);
1699 VERIFY(sa_bulk_update(zp
->z_sa_hdl
, bulk
, count
, tx
) == 0);
1708 * Free space in a file
1710 * IN: zp - znode of file to free data in.
1711 * off - start of range
1712 * len - end of range (0 => EOF)
1713 * flag - current file open mode flags.
1714 * log - TRUE if this action should be logged
1716 * RETURN: 0 on success, error code on failure
1719 zfs_freesp(znode_t
*zp
, uint64_t off
, uint64_t len
, int flag
, boolean_t log
)
1722 zfsvfs_t
*zfsvfs
= ZTOZSB(zp
);
1723 zilog_t
*zilog
= zfsvfs
->z_log
;
1725 uint64_t mtime
[2], ctime
[2];
1726 sa_bulk_attr_t bulk
[3];
1730 if ((error
= sa_lookup(zp
->z_sa_hdl
, SA_ZPL_MODE(zfsvfs
), &mode
,
1731 sizeof (mode
))) != 0)
1734 if (off
> zp
->z_size
) {
1735 error
= zfs_extend(zp
, off
+len
);
1736 if (error
== 0 && log
)
1742 error
= zfs_trunc(zp
, off
);
1744 if ((error
= zfs_free_range(zp
, off
, len
)) == 0 &&
1745 off
+ len
> zp
->z_size
)
1746 error
= zfs_extend(zp
, off
+len
);
1751 tx
= dmu_tx_create(zfsvfs
->z_os
);
1752 dmu_tx_hold_sa(tx
, zp
->z_sa_hdl
, B_FALSE
);
1753 zfs_sa_upgrade_txholds(tx
, zp
);
1754 error
= dmu_tx_assign(tx
, TXG_WAIT
);
1760 SA_ADD_BULK_ATTR(bulk
, count
, SA_ZPL_MTIME(zfsvfs
), NULL
, mtime
, 16);
1761 SA_ADD_BULK_ATTR(bulk
, count
, SA_ZPL_CTIME(zfsvfs
), NULL
, ctime
, 16);
1762 SA_ADD_BULK_ATTR(bulk
, count
, SA_ZPL_FLAGS(zfsvfs
),
1763 NULL
, &zp
->z_pflags
, 8);
1764 zfs_tstamp_update_setup(zp
, CONTENT_MODIFIED
, mtime
, ctime
);
1765 error
= sa_bulk_update(zp
->z_sa_hdl
, bulk
, count
, tx
);
1768 zfs_log_truncate(zilog
, tx
, TX_TRUNCATE
, zp
, off
, len
);
1772 zfs_inode_update(zp
);
1777 * Truncate the page cache - for file truncate operations, use
1778 * the purpose-built API for truncations. For punching operations,
1779 * the truncation is handled under a range lock in zfs_free_range.
1782 truncate_setsize(ZTOI(zp
), off
);
1787 zfs_create_fs(objset_t
*os
, cred_t
*cr
, nvlist_t
*zplprops
, dmu_tx_t
*tx
)
1789 struct super_block
*sb
;
1791 uint64_t moid
, obj
, sa_obj
, version
;
1792 uint64_t sense
= ZFS_CASE_SENSITIVE
;
1798 znode_t
*rootzp
= NULL
;
1801 zfs_acl_ids_t acl_ids
;
1804 * First attempt to create master node.
1807 * In an empty objset, there are no blocks to read and thus
1808 * there can be no i/o errors (which we assert below).
1810 moid
= MASTER_NODE_OBJ
;
1811 error
= zap_create_claim(os
, moid
, DMU_OT_MASTER_NODE
,
1812 DMU_OT_NONE
, 0, tx
);
1816 * Set starting attributes.
1818 version
= zfs_zpl_version_map(spa_version(dmu_objset_spa(os
)));
1820 while ((elem
= nvlist_next_nvpair(zplprops
, elem
)) != NULL
) {
1821 /* For the moment we expect all zpl props to be uint64_ts */
1825 ASSERT(nvpair_type(elem
) == DATA_TYPE_UINT64
);
1826 VERIFY(nvpair_value_uint64(elem
, &val
) == 0);
1827 name
= nvpair_name(elem
);
1828 if (strcmp(name
, zfs_prop_to_name(ZFS_PROP_VERSION
)) == 0) {
1832 error
= zap_update(os
, moid
, name
, 8, 1, &val
, tx
);
1835 if (strcmp(name
, zfs_prop_to_name(ZFS_PROP_NORMALIZE
)) == 0)
1837 else if (strcmp(name
, zfs_prop_to_name(ZFS_PROP_CASE
)) == 0)
1840 ASSERT(version
!= 0);
1841 error
= zap_update(os
, moid
, ZPL_VERSION_STR
, 8, 1, &version
, tx
);
1844 * Create zap object used for SA attribute registration
1847 if (version
>= ZPL_VERSION_SA
) {
1848 sa_obj
= zap_create(os
, DMU_OT_SA_MASTER_NODE
,
1849 DMU_OT_NONE
, 0, tx
);
1850 error
= zap_add(os
, moid
, ZFS_SA_ATTRS
, 8, 1, &sa_obj
, tx
);
1856 * Create a delete queue.
1858 obj
= zap_create(os
, DMU_OT_UNLINKED_SET
, DMU_OT_NONE
, 0, tx
);
1860 error
= zap_add(os
, moid
, ZFS_UNLINKED_SET
, 8, 1, &obj
, tx
);
1864 * Create root znode. Create minimal znode/inode/zfsvfs/sb
1865 * to allow zfs_mknode to work.
1867 vattr
.va_mask
= ATTR_MODE
|ATTR_UID
|ATTR_GID
;
1868 vattr
.va_mode
= S_IFDIR
|0755;
1869 vattr
.va_uid
= crgetuid(cr
);
1870 vattr
.va_gid
= crgetgid(cr
);
1872 rootzp
= kmem_cache_alloc(znode_cache
, KM_SLEEP
);
1873 rootzp
->z_moved
= 0;
1874 rootzp
->z_unlinked
= 0;
1875 rootzp
->z_atime_dirty
= 0;
1876 rootzp
->z_is_sa
= USE_SA(version
, os
);
1877 rootzp
->z_pflags
= 0;
1879 zfsvfs
= kmem_zalloc(sizeof (zfsvfs_t
), KM_SLEEP
);
1881 zfsvfs
->z_parent
= zfsvfs
;
1882 zfsvfs
->z_version
= version
;
1883 zfsvfs
->z_use_fuids
= USE_FUIDS(version
, os
);
1884 zfsvfs
->z_use_sa
= USE_SA(version
, os
);
1885 zfsvfs
->z_norm
= norm
;
1887 sb
= kmem_zalloc(sizeof (struct super_block
), KM_SLEEP
);
1888 sb
->s_fs_info
= zfsvfs
;
1890 ZTOI(rootzp
)->i_sb
= sb
;
1892 error
= sa_setup(os
, sa_obj
, zfs_attr_table
, ZPL_END
,
1893 &zfsvfs
->z_attr_table
);
1898 * Fold case on file systems that are always or sometimes case
1901 if (sense
== ZFS_CASE_INSENSITIVE
|| sense
== ZFS_CASE_MIXED
)
1902 zfsvfs
->z_norm
|= U8_TEXTPREP_TOUPPER
;
1904 mutex_init(&zfsvfs
->z_znodes_lock
, NULL
, MUTEX_DEFAULT
, NULL
);
1905 list_create(&zfsvfs
->z_all_znodes
, sizeof (znode_t
),
1906 offsetof(znode_t
, z_link_node
));
1908 size
= MIN(1 << (highbit64(zfs_object_mutex_size
)-1), ZFS_OBJ_MTX_MAX
);
1909 zfsvfs
->z_hold_size
= size
;
1910 zfsvfs
->z_hold_trees
= vmem_zalloc(sizeof (avl_tree_t
) * size
,
1912 zfsvfs
->z_hold_locks
= vmem_zalloc(sizeof (kmutex_t
) * size
, KM_SLEEP
);
1913 for (i
= 0; i
!= size
; i
++) {
1914 avl_create(&zfsvfs
->z_hold_trees
[i
], zfs_znode_hold_compare
,
1915 sizeof (znode_hold_t
), offsetof(znode_hold_t
, zh_node
));
1916 mutex_init(&zfsvfs
->z_hold_locks
[i
], NULL
, MUTEX_DEFAULT
, NULL
);
1919 VERIFY(0 == zfs_acl_ids_create(rootzp
, IS_ROOT_NODE
, &vattr
,
1920 cr
, NULL
, &acl_ids
));
1921 zfs_mknode(rootzp
, &vattr
, tx
, cr
, IS_ROOT_NODE
, &zp
, &acl_ids
);
1922 ASSERT3P(zp
, ==, rootzp
);
1923 error
= zap_add(os
, moid
, ZFS_ROOT_OBJ
, 8, 1, &rootzp
->z_id
, tx
);
1925 zfs_acl_ids_free(&acl_ids
);
1927 atomic_set(&ZTOI(rootzp
)->i_count
, 0);
1928 sa_handle_destroy(rootzp
->z_sa_hdl
);
1929 kmem_cache_free(znode_cache
, rootzp
);
1931 for (i
= 0; i
!= size
; i
++) {
1932 avl_destroy(&zfsvfs
->z_hold_trees
[i
]);
1933 mutex_destroy(&zfsvfs
->z_hold_locks
[i
]);
1936 mutex_destroy(&zfsvfs
->z_znodes_lock
);
1938 vmem_free(zfsvfs
->z_hold_trees
, sizeof (avl_tree_t
) * size
);
1939 vmem_free(zfsvfs
->z_hold_locks
, sizeof (kmutex_t
) * size
);
1940 kmem_free(sb
, sizeof (struct super_block
));
1941 kmem_free(zfsvfs
, sizeof (zfsvfs_t
));
1943 #endif /* _KERNEL */
1946 zfs_sa_setup(objset_t
*osp
, sa_attr_type_t
**sa_table
)
1948 uint64_t sa_obj
= 0;
1951 error
= zap_lookup(osp
, MASTER_NODE_OBJ
, ZFS_SA_ATTRS
, 8, 1, &sa_obj
);
1952 if (error
!= 0 && error
!= ENOENT
)
1955 error
= sa_setup(osp
, sa_obj
, zfs_attr_table
, ZPL_END
, sa_table
);
1960 zfs_grab_sa_handle(objset_t
*osp
, uint64_t obj
, sa_handle_t
**hdlp
,
1961 dmu_buf_t
**db
, void *tag
)
1963 dmu_object_info_t doi
;
1966 if ((error
= sa_buf_hold(osp
, obj
, tag
, db
)) != 0)
1969 dmu_object_info_from_db(*db
, &doi
);
1970 if ((doi
.doi_bonus_type
!= DMU_OT_SA
&&
1971 doi
.doi_bonus_type
!= DMU_OT_ZNODE
) ||
1972 (doi
.doi_bonus_type
== DMU_OT_ZNODE
&&
1973 doi
.doi_bonus_size
< sizeof (znode_phys_t
))) {
1974 sa_buf_rele(*db
, tag
);
1975 return (SET_ERROR(ENOTSUP
));
1978 error
= sa_handle_get(osp
, obj
, NULL
, SA_HDL_PRIVATE
, hdlp
);
1980 sa_buf_rele(*db
, tag
);
1988 zfs_release_sa_handle(sa_handle_t
*hdl
, dmu_buf_t
*db
, void *tag
)
1990 sa_handle_destroy(hdl
);
1991 sa_buf_rele(db
, tag
);
1995 * Given an object number, return its parent object number and whether
1996 * or not the object is an extended attribute directory.
1999 zfs_obj_to_pobj(objset_t
*osp
, sa_handle_t
*hdl
, sa_attr_type_t
*sa_table
,
2000 uint64_t *pobjp
, int *is_xattrdir
)
2005 uint64_t parent_mode
;
2006 sa_bulk_attr_t bulk
[3];
2007 sa_handle_t
*sa_hdl
;
2012 SA_ADD_BULK_ATTR(bulk
, count
, sa_table
[ZPL_PARENT
], NULL
,
2013 &parent
, sizeof (parent
));
2014 SA_ADD_BULK_ATTR(bulk
, count
, sa_table
[ZPL_FLAGS
], NULL
,
2015 &pflags
, sizeof (pflags
));
2016 SA_ADD_BULK_ATTR(bulk
, count
, sa_table
[ZPL_MODE
], NULL
,
2017 &mode
, sizeof (mode
));
2019 if ((error
= sa_bulk_lookup(hdl
, bulk
, count
)) != 0)
2023 * When a link is removed its parent pointer is not changed and will
2024 * be invalid. There are two cases where a link is removed but the
2025 * file stays around, when it goes to the delete queue and when there
2026 * are additional links.
2028 error
= zfs_grab_sa_handle(osp
, parent
, &sa_hdl
, &sa_db
, FTAG
);
2032 error
= sa_lookup(sa_hdl
, ZPL_MODE
, &parent_mode
, sizeof (parent_mode
));
2033 zfs_release_sa_handle(sa_hdl
, sa_db
, FTAG
);
2037 *is_xattrdir
= ((pflags
& ZFS_XATTR
) != 0) && S_ISDIR(mode
);
2040 * Extended attributes can be applied to files, directories, etc.
2041 * Otherwise the parent must be a directory.
2043 if (!*is_xattrdir
&& !S_ISDIR(parent_mode
))
2044 return (SET_ERROR(EINVAL
));
2052 * Given an object number, return some zpl level statistics
2055 zfs_obj_to_stats_impl(sa_handle_t
*hdl
, sa_attr_type_t
*sa_table
,
2058 sa_bulk_attr_t bulk
[4];
2061 SA_ADD_BULK_ATTR(bulk
, count
, sa_table
[ZPL_MODE
], NULL
,
2062 &sb
->zs_mode
, sizeof (sb
->zs_mode
));
2063 SA_ADD_BULK_ATTR(bulk
, count
, sa_table
[ZPL_GEN
], NULL
,
2064 &sb
->zs_gen
, sizeof (sb
->zs_gen
));
2065 SA_ADD_BULK_ATTR(bulk
, count
, sa_table
[ZPL_LINKS
], NULL
,
2066 &sb
->zs_links
, sizeof (sb
->zs_links
));
2067 SA_ADD_BULK_ATTR(bulk
, count
, sa_table
[ZPL_CTIME
], NULL
,
2068 &sb
->zs_ctime
, sizeof (sb
->zs_ctime
));
2070 return (sa_bulk_lookup(hdl
, bulk
, count
));
2074 zfs_obj_to_path_impl(objset_t
*osp
, uint64_t obj
, sa_handle_t
*hdl
,
2075 sa_attr_type_t
*sa_table
, char *buf
, int len
)
2077 sa_handle_t
*sa_hdl
;
2078 sa_handle_t
*prevhdl
= NULL
;
2079 dmu_buf_t
*prevdb
= NULL
;
2080 dmu_buf_t
*sa_db
= NULL
;
2081 char *path
= buf
+ len
- 1;
2087 uint64_t deleteq_obj
;
2088 VERIFY0(zap_lookup(osp
, MASTER_NODE_OBJ
,
2089 ZFS_UNLINKED_SET
, sizeof (uint64_t), 1, &deleteq_obj
));
2090 error
= zap_lookup_int(osp
, deleteq_obj
, obj
);
2093 } else if (error
!= ENOENT
) {
2100 char component
[MAXNAMELEN
+ 2];
2102 int is_xattrdir
= 0;
2105 zfs_release_sa_handle(prevhdl
, prevdb
, FTAG
);
2107 if ((error
= zfs_obj_to_pobj(osp
, sa_hdl
, sa_table
, &pobj
,
2108 &is_xattrdir
)) != 0)
2119 (void) sprintf(component
+ 1, "<xattrdir>");
2121 error
= zap_value_search(osp
, pobj
, obj
,
2122 ZFS_DIRENT_OBJ(-1ULL), component
+ 1);
2127 complen
= strlen(component
);
2129 ASSERT(path
>= buf
);
2130 bcopy(component
, path
, complen
);
2133 if (sa_hdl
!= hdl
) {
2137 error
= zfs_grab_sa_handle(osp
, obj
, &sa_hdl
, &sa_db
, FTAG
);
2145 if (sa_hdl
!= NULL
&& sa_hdl
!= hdl
) {
2146 ASSERT(sa_db
!= NULL
);
2147 zfs_release_sa_handle(sa_hdl
, sa_db
, FTAG
);
2151 (void) memmove(buf
, path
, buf
+ len
- path
);
2157 zfs_obj_to_path(objset_t
*osp
, uint64_t obj
, char *buf
, int len
)
2159 sa_attr_type_t
*sa_table
;
2164 error
= zfs_sa_setup(osp
, &sa_table
);
2168 error
= zfs_grab_sa_handle(osp
, obj
, &hdl
, &db
, FTAG
);
2172 error
= zfs_obj_to_path_impl(osp
, obj
, hdl
, sa_table
, buf
, len
);
2174 zfs_release_sa_handle(hdl
, db
, FTAG
);
2179 zfs_obj_to_stats(objset_t
*osp
, uint64_t obj
, zfs_stat_t
*sb
,
2182 char *path
= buf
+ len
- 1;
2183 sa_attr_type_t
*sa_table
;
2190 error
= zfs_sa_setup(osp
, &sa_table
);
2194 error
= zfs_grab_sa_handle(osp
, obj
, &hdl
, &db
, FTAG
);
2198 error
= zfs_obj_to_stats_impl(hdl
, sa_table
, sb
);
2200 zfs_release_sa_handle(hdl
, db
, FTAG
);
2204 error
= zfs_obj_to_path_impl(osp
, obj
, hdl
, sa_table
, buf
, len
);
2206 zfs_release_sa_handle(hdl
, db
, FTAG
);
2210 #if defined(_KERNEL)
2211 EXPORT_SYMBOL(zfs_create_fs
);
2212 EXPORT_SYMBOL(zfs_obj_to_path
);
2215 module_param(zfs_object_mutex_size
, uint
, 0644);
2216 MODULE_PARM_DESC(zfs_object_mutex_size
, "Size of znode hold array");