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) 2011, 2014 by Delphix. All rights reserved.
29 #include <sys/zfs_context.h>
31 #include <sys/refcount.h>
32 #include <sys/zap_impl.h>
33 #include <sys/zap_leaf.h>
38 #include <sys/sunddi.h>
41 extern inline mzap_phys_t
*zap_m_phys(zap_t
*zap
);
43 static int mzap_upgrade(zap_t
**zapp
, dmu_tx_t
*tx
, zap_flags_t flags
);
46 zap_getflags(zap_t
*zap
)
50 return (zap_f_phys(zap
)->zap_flags
);
54 zap_hashbits(zap_t
*zap
)
56 if (zap_getflags(zap
) & ZAP_FLAG_HASH64
)
65 if (zap_getflags(zap
) & ZAP_FLAG_HASH64
)
72 zap_hash(zap_name_t
*zn
)
74 zap_t
*zap
= zn
->zn_zap
;
77 if (zap_getflags(zap
) & ZAP_FLAG_PRE_HASHED_KEY
) {
78 ASSERT(zap_getflags(zap
) & ZAP_FLAG_UINT64_KEY
);
79 h
= *(uint64_t *)zn
->zn_key_orig
;
83 ASSERT(zfs_crc64_table
[128] == ZFS_CRC64_POLY
);
85 if (zap_getflags(zap
) & ZAP_FLAG_UINT64_KEY
) {
87 const uint64_t *wp
= zn
->zn_key_norm
;
89 ASSERT(zn
->zn_key_intlen
== 8);
90 for (i
= 0; i
< zn
->zn_key_norm_numints
; wp
++, i
++) {
94 for (j
= 0; j
< zn
->zn_key_intlen
; j
++) {
96 zfs_crc64_table
[(h
^ word
) & 0xFF];
102 const uint8_t *cp
= zn
->zn_key_norm
;
105 * We previously stored the terminating null on
106 * disk, but didn't hash it, so we need to
107 * continue to not hash it. (The
108 * zn_key_*_numints includes the terminating
109 * null for non-binary keys.)
111 len
= zn
->zn_key_norm_numints
- 1;
113 ASSERT(zn
->zn_key_intlen
== 1);
114 for (i
= 0; i
< len
; cp
++, i
++) {
116 zfs_crc64_table
[(h
^ *cp
) & 0xFF];
121 * Don't use all 64 bits, since we need some in the cookie for
122 * the collision differentiator. We MUST use the high bits,
123 * since those are the ones that we first pay attention to when
124 * chosing the bucket.
126 h
&= ~((1ULL << (64 - zap_hashbits(zap
))) - 1);
132 zap_normalize(zap_t
*zap
, const char *name
, char *namenorm
)
134 size_t inlen
, outlen
;
137 ASSERT(!(zap_getflags(zap
) & ZAP_FLAG_UINT64_KEY
));
139 inlen
= strlen(name
) + 1;
140 outlen
= ZAP_MAXNAMELEN
;
143 (void) u8_textprep_str((char *)name
, &inlen
, namenorm
, &outlen
,
144 zap
->zap_normflags
| U8_TEXTPREP_IGNORE_NULL
|
145 U8_TEXTPREP_IGNORE_INVALID
, U8_UNICODE_LATEST
, &err
);
151 zap_match(zap_name_t
*zn
, const char *matchname
)
153 ASSERT(!(zap_getflags(zn
->zn_zap
) & ZAP_FLAG_UINT64_KEY
));
155 if (zn
->zn_matchtype
== MT_FIRST
) {
156 char norm
[ZAP_MAXNAMELEN
];
158 if (zap_normalize(zn
->zn_zap
, matchname
, norm
) != 0)
161 return (strcmp(zn
->zn_key_norm
, norm
) == 0);
163 /* MT_BEST or MT_EXACT */
164 return (strcmp(zn
->zn_key_orig
, matchname
) == 0);
169 zap_name_free(zap_name_t
*zn
)
171 kmem_free(zn
, sizeof (zap_name_t
));
175 zap_name_alloc(zap_t
*zap
, const char *key
, matchtype_t mt
)
177 zap_name_t
*zn
= kmem_alloc(sizeof (zap_name_t
), KM_SLEEP
);
180 zn
->zn_key_intlen
= sizeof (*key
);
181 zn
->zn_key_orig
= key
;
182 zn
->zn_key_orig_numints
= strlen(zn
->zn_key_orig
) + 1;
183 zn
->zn_matchtype
= mt
;
184 if (zap
->zap_normflags
) {
185 if (zap_normalize(zap
, key
, zn
->zn_normbuf
) != 0) {
189 zn
->zn_key_norm
= zn
->zn_normbuf
;
190 zn
->zn_key_norm_numints
= strlen(zn
->zn_key_norm
) + 1;
192 if (mt
!= MT_EXACT
) {
196 zn
->zn_key_norm
= zn
->zn_key_orig
;
197 zn
->zn_key_norm_numints
= zn
->zn_key_orig_numints
;
200 zn
->zn_hash
= zap_hash(zn
);
205 zap_name_alloc_uint64(zap_t
*zap
, const uint64_t *key
, int numints
)
207 zap_name_t
*zn
= kmem_alloc(sizeof (zap_name_t
), KM_SLEEP
);
209 ASSERT(zap
->zap_normflags
== 0);
211 zn
->zn_key_intlen
= sizeof (*key
);
212 zn
->zn_key_orig
= zn
->zn_key_norm
= key
;
213 zn
->zn_key_orig_numints
= zn
->zn_key_norm_numints
= numints
;
214 zn
->zn_matchtype
= MT_EXACT
;
216 zn
->zn_hash
= zap_hash(zn
);
221 mzap_byteswap(mzap_phys_t
*buf
, size_t size
)
224 buf
->mz_block_type
= BSWAP_64(buf
->mz_block_type
);
225 buf
->mz_salt
= BSWAP_64(buf
->mz_salt
);
226 buf
->mz_normflags
= BSWAP_64(buf
->mz_normflags
);
227 max
= (size
/ MZAP_ENT_LEN
) - 1;
228 for (i
= 0; i
< max
; i
++) {
229 buf
->mz_chunk
[i
].mze_value
=
230 BSWAP_64(buf
->mz_chunk
[i
].mze_value
);
231 buf
->mz_chunk
[i
].mze_cd
=
232 BSWAP_32(buf
->mz_chunk
[i
].mze_cd
);
237 zap_byteswap(void *buf
, size_t size
)
241 block_type
= *(uint64_t *)buf
;
243 if (block_type
== ZBT_MICRO
|| block_type
== BSWAP_64(ZBT_MICRO
)) {
244 /* ASSERT(magic == ZAP_LEAF_MAGIC); */
245 mzap_byteswap(buf
, size
);
247 fzap_byteswap(buf
, size
);
252 mze_compare(const void *arg1
, const void *arg2
)
254 const mzap_ent_t
*mze1
= arg1
;
255 const mzap_ent_t
*mze2
= arg2
;
257 if (mze1
->mze_hash
> mze2
->mze_hash
)
259 if (mze1
->mze_hash
< mze2
->mze_hash
)
261 if (mze1
->mze_cd
> mze2
->mze_cd
)
263 if (mze1
->mze_cd
< mze2
->mze_cd
)
269 mze_insert(zap_t
*zap
, int chunkid
, uint64_t hash
)
273 ASSERT(zap
->zap_ismicro
);
274 ASSERT(RW_WRITE_HELD(&zap
->zap_rwlock
));
276 mze
= kmem_alloc(sizeof (mzap_ent_t
), KM_SLEEP
);
277 mze
->mze_chunkid
= chunkid
;
278 mze
->mze_hash
= hash
;
279 mze
->mze_cd
= MZE_PHYS(zap
, mze
)->mze_cd
;
280 ASSERT(MZE_PHYS(zap
, mze
)->mze_name
[0] != 0);
281 avl_add(&zap
->zap_m
.zap_avl
, mze
);
285 mze_find(zap_name_t
*zn
)
287 mzap_ent_t mze_tofind
;
290 avl_tree_t
*avl
= &zn
->zn_zap
->zap_m
.zap_avl
;
292 ASSERT(zn
->zn_zap
->zap_ismicro
);
293 ASSERT(RW_LOCK_HELD(&zn
->zn_zap
->zap_rwlock
));
295 mze_tofind
.mze_hash
= zn
->zn_hash
;
296 mze_tofind
.mze_cd
= 0;
299 mze
= avl_find(avl
, &mze_tofind
, &idx
);
301 mze
= avl_nearest(avl
, idx
, AVL_AFTER
);
302 for (; mze
&& mze
->mze_hash
== zn
->zn_hash
; mze
= AVL_NEXT(avl
, mze
)) {
303 ASSERT3U(mze
->mze_cd
, ==, MZE_PHYS(zn
->zn_zap
, mze
)->mze_cd
);
304 if (zap_match(zn
, MZE_PHYS(zn
->zn_zap
, mze
)->mze_name
))
307 if (zn
->zn_matchtype
== MT_BEST
) {
308 zn
->zn_matchtype
= MT_FIRST
;
315 mze_find_unused_cd(zap_t
*zap
, uint64_t hash
)
317 mzap_ent_t mze_tofind
;
320 avl_tree_t
*avl
= &zap
->zap_m
.zap_avl
;
323 ASSERT(zap
->zap_ismicro
);
324 ASSERT(RW_LOCK_HELD(&zap
->zap_rwlock
));
326 mze_tofind
.mze_hash
= hash
;
327 mze_tofind
.mze_cd
= 0;
330 for (mze
= avl_find(avl
, &mze_tofind
, &idx
);
331 mze
&& mze
->mze_hash
== hash
; mze
= AVL_NEXT(avl
, mze
)) {
332 if (mze
->mze_cd
!= cd
)
341 mze_remove(zap_t
*zap
, mzap_ent_t
*mze
)
343 ASSERT(zap
->zap_ismicro
);
344 ASSERT(RW_WRITE_HELD(&zap
->zap_rwlock
));
346 avl_remove(&zap
->zap_m
.zap_avl
, mze
);
347 kmem_free(mze
, sizeof (mzap_ent_t
));
351 mze_destroy(zap_t
*zap
)
354 void *avlcookie
= NULL
;
356 while ((mze
= avl_destroy_nodes(&zap
->zap_m
.zap_avl
, &avlcookie
)))
357 kmem_free(mze
, sizeof (mzap_ent_t
));
358 avl_destroy(&zap
->zap_m
.zap_avl
);
362 mzap_open(objset_t
*os
, uint64_t obj
, dmu_buf_t
*db
)
368 ASSERT3U(MZAP_ENT_LEN
, ==, sizeof (mzap_ent_phys_t
));
370 zap
= kmem_zalloc(sizeof (zap_t
), KM_SLEEP
);
371 rw_init(&zap
->zap_rwlock
, NULL
, RW_DEFAULT
, NULL
);
372 rw_enter(&zap
->zap_rwlock
, RW_WRITER
);
373 zap
->zap_objset
= os
;
374 zap
->zap_object
= obj
;
377 if (*(uint64_t *)db
->db_data
!= ZBT_MICRO
) {
378 mutex_init(&zap
->zap_f
.zap_num_entries_mtx
, 0, 0, 0);
379 zap
->zap_f
.zap_block_shift
= highbit64(db
->db_size
) - 1;
381 zap
->zap_ismicro
= TRUE
;
385 * Make sure that zap_ismicro is set before we let others see
386 * it, because zap_lockdir() checks zap_ismicro without the lock
389 winner
= dmu_buf_set_user(db
, zap
, zap_evict
);
391 if (winner
!= NULL
) {
392 rw_exit(&zap
->zap_rwlock
);
393 rw_destroy(&zap
->zap_rwlock
);
394 if (!zap
->zap_ismicro
)
395 mutex_destroy(&zap
->zap_f
.zap_num_entries_mtx
);
396 kmem_free(zap
, sizeof (zap_t
));
400 if (zap
->zap_ismicro
) {
401 zap
->zap_salt
= zap_m_phys(zap
)->mz_salt
;
402 zap
->zap_normflags
= zap_m_phys(zap
)->mz_normflags
;
403 zap
->zap_m
.zap_num_chunks
= db
->db_size
/ MZAP_ENT_LEN
- 1;
404 avl_create(&zap
->zap_m
.zap_avl
, mze_compare
,
405 sizeof (mzap_ent_t
), offsetof(mzap_ent_t
, mze_node
));
407 for (i
= 0; i
< zap
->zap_m
.zap_num_chunks
; i
++) {
408 mzap_ent_phys_t
*mze
=
409 &zap_m_phys(zap
)->mz_chunk
[i
];
410 if (mze
->mze_name
[0]) {
413 zap
->zap_m
.zap_num_entries
++;
414 zn
= zap_name_alloc(zap
, mze
->mze_name
,
416 mze_insert(zap
, i
, zn
->zn_hash
);
421 zap
->zap_salt
= zap_f_phys(zap
)->zap_salt
;
422 zap
->zap_normflags
= zap_f_phys(zap
)->zap_normflags
;
424 ASSERT3U(sizeof (struct zap_leaf_header
), ==,
425 2*ZAP_LEAF_CHUNKSIZE
);
428 * The embedded pointer table should not overlap the
431 ASSERT3P(&ZAP_EMBEDDED_PTRTBL_ENT(zap
, 0), >,
432 &zap_f_phys(zap
)->zap_salt
);
435 * The embedded pointer table should end at the end of
438 ASSERT3U((uintptr_t)&ZAP_EMBEDDED_PTRTBL_ENT(zap
,
439 1<<ZAP_EMBEDDED_PTRTBL_SHIFT(zap
)) -
440 (uintptr_t)zap_f_phys(zap
), ==,
441 zap
->zap_dbuf
->db_size
);
443 rw_exit(&zap
->zap_rwlock
);
448 zap_lockdir(objset_t
*os
, uint64_t obj
, dmu_tx_t
*tx
,
449 krw_t lti
, boolean_t fatreader
, boolean_t adding
, zap_t
**zapp
)
451 dmu_object_info_t doi
;
459 err
= dmu_buf_hold(os
, obj
, 0, NULL
, &db
, DMU_READ_NO_PREFETCH
);
463 dmu_object_info_from_db(db
, &doi
);
464 if (DMU_OT_BYTESWAP(doi
.doi_type
) != DMU_BSWAP_ZAP
)
465 return (SET_ERROR(EINVAL
));
467 zap
= dmu_buf_get_user(db
);
469 zap
= mzap_open(os
, obj
, db
);
472 * We're checking zap_ismicro without the lock held, in order to
473 * tell what type of lock we want. Once we have some sort of
474 * lock, see if it really is the right type. In practice this
475 * can only be different if it was upgraded from micro to fat,
476 * and micro wanted WRITER but fat only needs READER.
478 lt
= (!zap
->zap_ismicro
&& fatreader
) ? RW_READER
: lti
;
479 rw_enter(&zap
->zap_rwlock
, lt
);
480 if (lt
!= ((!zap
->zap_ismicro
&& fatreader
) ? RW_READER
: lti
)) {
481 /* it was upgraded, now we only need reader */
482 ASSERT(lt
== RW_WRITER
);
484 (!zap
->zap_ismicro
&& fatreader
) ? RW_READER
: lti
);
485 rw_downgrade(&zap
->zap_rwlock
);
489 zap
->zap_objset
= os
;
492 dmu_buf_will_dirty(db
, tx
);
494 ASSERT3P(zap
->zap_dbuf
, ==, db
);
496 ASSERT(!zap
->zap_ismicro
||
497 zap
->zap_m
.zap_num_entries
<= zap
->zap_m
.zap_num_chunks
);
498 if (zap
->zap_ismicro
&& tx
&& adding
&&
499 zap
->zap_m
.zap_num_entries
== zap
->zap_m
.zap_num_chunks
) {
500 uint64_t newsz
= db
->db_size
+ SPA_MINBLOCKSIZE
;
501 if (newsz
> MZAP_MAX_BLKSZ
) {
502 dprintf("upgrading obj %llu: num_entries=%u\n",
503 obj
, zap
->zap_m
.zap_num_entries
);
505 return (mzap_upgrade(zapp
, tx
, 0));
507 err
= dmu_object_set_blocksize(os
, obj
, newsz
, 0, tx
);
509 zap
->zap_m
.zap_num_chunks
=
510 db
->db_size
/ MZAP_ENT_LEN
- 1;
518 zap_unlockdir(zap_t
*zap
)
520 rw_exit(&zap
->zap_rwlock
);
521 dmu_buf_rele(zap
->zap_dbuf
, NULL
);
525 mzap_upgrade(zap_t
**zapp
, dmu_tx_t
*tx
, zap_flags_t flags
)
532 ASSERT(RW_WRITE_HELD(&zap
->zap_rwlock
));
534 sz
= zap
->zap_dbuf
->db_size
;
535 mzp
= zio_buf_alloc(sz
);
536 bcopy(zap
->zap_dbuf
->db_data
, mzp
, sz
);
537 nchunks
= zap
->zap_m
.zap_num_chunks
;
540 err
= dmu_object_set_blocksize(zap
->zap_objset
, zap
->zap_object
,
541 1ULL << fzap_default_block_shift
, 0, tx
);
543 zio_buf_free(mzp
, sz
);
548 dprintf("upgrading obj=%llu with %u chunks\n",
549 zap
->zap_object
, nchunks
);
550 /* XXX destroy the avl later, so we can use the stored hash value */
553 fzap_upgrade(zap
, tx
, flags
);
555 for (i
= 0; i
< nchunks
; i
++) {
556 mzap_ent_phys_t
*mze
= &mzp
->mz_chunk
[i
];
558 if (mze
->mze_name
[0] == 0)
560 dprintf("adding %s=%llu\n",
561 mze
->mze_name
, mze
->mze_value
);
562 zn
= zap_name_alloc(zap
, mze
->mze_name
, MT_EXACT
);
563 err
= fzap_add_cd(zn
, 8, 1, &mze
->mze_value
, mze
->mze_cd
, tx
);
564 zap
= zn
->zn_zap
; /* fzap_add_cd() may change zap */
569 zio_buf_free(mzp
, sz
);
575 mzap_create_impl(objset_t
*os
, uint64_t obj
, int normflags
, zap_flags_t flags
,
581 VERIFY(0 == dmu_buf_hold(os
, obj
, 0, FTAG
, &db
, DMU_READ_NO_PREFETCH
));
585 dmu_object_info_t doi
;
586 dmu_object_info_from_db(db
, &doi
);
587 ASSERT3U(DMU_OT_BYTESWAP(doi
.doi_type
), ==, DMU_BSWAP_ZAP
);
591 dmu_buf_will_dirty(db
, tx
);
593 zp
->mz_block_type
= ZBT_MICRO
;
594 zp
->mz_salt
= ((uintptr_t)db
^ (uintptr_t)tx
^ (obj
<< 1)) | 1ULL;
595 zp
->mz_normflags
= normflags
;
596 dmu_buf_rele(db
, FTAG
);
600 /* Only fat zap supports flags; upgrade immediately. */
601 VERIFY(0 == zap_lockdir(os
, obj
, tx
, RW_WRITER
,
602 B_FALSE
, B_FALSE
, &zap
));
603 VERIFY3U(0, ==, mzap_upgrade(&zap
, tx
, flags
));
609 zap_create_claim(objset_t
*os
, uint64_t obj
, dmu_object_type_t ot
,
610 dmu_object_type_t bonustype
, int bonuslen
, dmu_tx_t
*tx
)
612 return (zap_create_claim_norm(os
, obj
,
613 0, ot
, bonustype
, bonuslen
, tx
));
617 zap_create_claim_norm(objset_t
*os
, uint64_t obj
, int normflags
,
618 dmu_object_type_t ot
,
619 dmu_object_type_t bonustype
, int bonuslen
, dmu_tx_t
*tx
)
623 err
= dmu_object_claim(os
, obj
, ot
, 0, bonustype
, bonuslen
, tx
);
626 mzap_create_impl(os
, obj
, normflags
, 0, tx
);
631 zap_create(objset_t
*os
, dmu_object_type_t ot
,
632 dmu_object_type_t bonustype
, int bonuslen
, dmu_tx_t
*tx
)
634 return (zap_create_norm(os
, 0, ot
, bonustype
, bonuslen
, tx
));
638 zap_create_norm(objset_t
*os
, int normflags
, dmu_object_type_t ot
,
639 dmu_object_type_t bonustype
, int bonuslen
, dmu_tx_t
*tx
)
641 uint64_t obj
= dmu_object_alloc(os
, ot
, 0, bonustype
, bonuslen
, tx
);
643 mzap_create_impl(os
, obj
, normflags
, 0, tx
);
648 zap_create_flags(objset_t
*os
, int normflags
, zap_flags_t flags
,
649 dmu_object_type_t ot
, int leaf_blockshift
, int indirect_blockshift
,
650 dmu_object_type_t bonustype
, int bonuslen
, dmu_tx_t
*tx
)
652 uint64_t obj
= dmu_object_alloc(os
, ot
, 0, bonustype
, bonuslen
, tx
);
654 ASSERT(leaf_blockshift
>= SPA_MINBLOCKSHIFT
&&
655 leaf_blockshift
<= SPA_MAXBLOCKSHIFT
&&
656 indirect_blockshift
>= SPA_MINBLOCKSHIFT
&&
657 indirect_blockshift
<= SPA_MAXBLOCKSHIFT
);
659 VERIFY(dmu_object_set_blocksize(os
, obj
,
660 1ULL << leaf_blockshift
, indirect_blockshift
, tx
) == 0);
662 mzap_create_impl(os
, obj
, normflags
, flags
, tx
);
667 zap_destroy(objset_t
*os
, uint64_t zapobj
, dmu_tx_t
*tx
)
670 * dmu_object_free will free the object number and free the
671 * data. Freeing the data will cause our pageout function to be
672 * called, which will destroy our data (zap_leaf_t's and zap_t).
675 return (dmu_object_free(os
, zapobj
, tx
));
680 zap_evict(dmu_buf_t
*db
, void *vzap
)
684 rw_destroy(&zap
->zap_rwlock
);
686 if (zap
->zap_ismicro
)
689 mutex_destroy(&zap
->zap_f
.zap_num_entries_mtx
);
691 kmem_free(zap
, sizeof (zap_t
));
695 zap_count(objset_t
*os
, uint64_t zapobj
, uint64_t *count
)
700 err
= zap_lockdir(os
, zapobj
, NULL
, RW_READER
, TRUE
, FALSE
, &zap
);
703 if (!zap
->zap_ismicro
) {
704 err
= fzap_count(zap
, count
);
706 *count
= zap
->zap_m
.zap_num_entries
;
713 * zn may be NULL; if not specified, it will be computed if needed.
714 * See also the comment above zap_entry_normalization_conflict().
717 mzap_normalization_conflict(zap_t
*zap
, zap_name_t
*zn
, mzap_ent_t
*mze
)
720 int direction
= AVL_BEFORE
;
721 boolean_t allocdzn
= B_FALSE
;
723 if (zap
->zap_normflags
== 0)
727 for (other
= avl_walk(&zap
->zap_m
.zap_avl
, mze
, direction
);
728 other
&& other
->mze_hash
== mze
->mze_hash
;
729 other
= avl_walk(&zap
->zap_m
.zap_avl
, other
, direction
)) {
732 zn
= zap_name_alloc(zap
, MZE_PHYS(zap
, mze
)->mze_name
,
736 if (zap_match(zn
, MZE_PHYS(zap
, other
)->mze_name
)) {
743 if (direction
== AVL_BEFORE
) {
744 direction
= AVL_AFTER
;
754 * Routines for manipulating attributes.
758 zap_lookup(objset_t
*os
, uint64_t zapobj
, const char *name
,
759 uint64_t integer_size
, uint64_t num_integers
, void *buf
)
761 return (zap_lookup_norm(os
, zapobj
, name
, integer_size
,
762 num_integers
, buf
, MT_EXACT
, NULL
, 0, NULL
));
766 zap_lookup_norm(objset_t
*os
, uint64_t zapobj
, const char *name
,
767 uint64_t integer_size
, uint64_t num_integers
, void *buf
,
768 matchtype_t mt
, char *realname
, int rn_len
,
776 err
= zap_lockdir(os
, zapobj
, NULL
, RW_READER
, TRUE
, FALSE
, &zap
);
779 zn
= zap_name_alloc(zap
, name
, mt
);
782 return (SET_ERROR(ENOTSUP
));
785 if (!zap
->zap_ismicro
) {
786 err
= fzap_lookup(zn
, integer_size
, num_integers
, buf
,
787 realname
, rn_len
, ncp
);
791 err
= SET_ERROR(ENOENT
);
793 if (num_integers
< 1) {
794 err
= SET_ERROR(EOVERFLOW
);
795 } else if (integer_size
!= 8) {
796 err
= SET_ERROR(EINVAL
);
799 MZE_PHYS(zap
, mze
)->mze_value
;
800 (void) strlcpy(realname
,
801 MZE_PHYS(zap
, mze
)->mze_name
, rn_len
);
803 *ncp
= mzap_normalization_conflict(zap
,
815 zap_prefetch_uint64(objset_t
*os
, uint64_t zapobj
, const uint64_t *key
,
822 err
= zap_lockdir(os
, zapobj
, NULL
, RW_READER
, TRUE
, FALSE
, &zap
);
825 zn
= zap_name_alloc_uint64(zap
, key
, key_numints
);
828 return (SET_ERROR(ENOTSUP
));
838 zap_lookup_uint64(objset_t
*os
, uint64_t zapobj
, const uint64_t *key
,
839 int key_numints
, uint64_t integer_size
, uint64_t num_integers
, void *buf
)
845 err
= zap_lockdir(os
, zapobj
, NULL
, RW_READER
, TRUE
, FALSE
, &zap
);
848 zn
= zap_name_alloc_uint64(zap
, key
, key_numints
);
851 return (SET_ERROR(ENOTSUP
));
854 err
= fzap_lookup(zn
, integer_size
, num_integers
, buf
,
862 zap_contains(objset_t
*os
, uint64_t zapobj
, const char *name
)
864 int err
= zap_lookup_norm(os
, zapobj
, name
, 0,
865 0, NULL
, MT_EXACT
, NULL
, 0, NULL
);
866 if (err
== EOVERFLOW
|| err
== EINVAL
)
867 err
= 0; /* found, but skipped reading the value */
872 zap_length(objset_t
*os
, uint64_t zapobj
, const char *name
,
873 uint64_t *integer_size
, uint64_t *num_integers
)
880 err
= zap_lockdir(os
, zapobj
, NULL
, RW_READER
, TRUE
, FALSE
, &zap
);
883 zn
= zap_name_alloc(zap
, name
, MT_EXACT
);
886 return (SET_ERROR(ENOTSUP
));
888 if (!zap
->zap_ismicro
) {
889 err
= fzap_length(zn
, integer_size
, num_integers
);
893 err
= SET_ERROR(ENOENT
);
907 zap_length_uint64(objset_t
*os
, uint64_t zapobj
, const uint64_t *key
,
908 int key_numints
, uint64_t *integer_size
, uint64_t *num_integers
)
914 err
= zap_lockdir(os
, zapobj
, NULL
, RW_READER
, TRUE
, FALSE
, &zap
);
917 zn
= zap_name_alloc_uint64(zap
, key
, key_numints
);
920 return (SET_ERROR(ENOTSUP
));
922 err
= fzap_length(zn
, integer_size
, num_integers
);
929 mzap_addent(zap_name_t
*zn
, uint64_t value
)
932 zap_t
*zap
= zn
->zn_zap
;
933 int start
= zap
->zap_m
.zap_alloc_next
;
936 ASSERT(RW_WRITE_HELD(&zap
->zap_rwlock
));
939 for (i
= 0; i
< zap
->zap_m
.zap_num_chunks
; i
++) {
940 ASSERTV(mzap_ent_phys_t
*mze
);
941 ASSERT(mze
= &zap_m_phys(zap
)->mz_chunk
[i
]);
942 ASSERT(strcmp(zn
->zn_key_orig
, mze
->mze_name
) != 0);
946 cd
= mze_find_unused_cd(zap
, zn
->zn_hash
);
947 /* given the limited size of the microzap, this can't happen */
948 ASSERT(cd
< zap_maxcd(zap
));
951 for (i
= start
; i
< zap
->zap_m
.zap_num_chunks
; i
++) {
952 mzap_ent_phys_t
*mze
= &zap_m_phys(zap
)->mz_chunk
[i
];
953 if (mze
->mze_name
[0] == 0) {
954 mze
->mze_value
= value
;
956 (void) strcpy(mze
->mze_name
, zn
->zn_key_orig
);
957 zap
->zap_m
.zap_num_entries
++;
958 zap
->zap_m
.zap_alloc_next
= i
+1;
959 if (zap
->zap_m
.zap_alloc_next
==
960 zap
->zap_m
.zap_num_chunks
)
961 zap
->zap_m
.zap_alloc_next
= 0;
962 mze_insert(zap
, i
, zn
->zn_hash
);
970 cmn_err(CE_PANIC
, "out of entries!");
974 zap_add(objset_t
*os
, uint64_t zapobj
, const char *key
,
975 int integer_size
, uint64_t num_integers
,
976 const void *val
, dmu_tx_t
*tx
)
981 const uint64_t *intval
= val
;
984 err
= zap_lockdir(os
, zapobj
, tx
, RW_WRITER
, TRUE
, TRUE
, &zap
);
987 zn
= zap_name_alloc(zap
, key
, MT_EXACT
);
990 return (SET_ERROR(ENOTSUP
));
992 if (!zap
->zap_ismicro
) {
993 err
= fzap_add(zn
, integer_size
, num_integers
, val
, tx
);
994 zap
= zn
->zn_zap
; /* fzap_add() may change zap */
995 } else if (integer_size
!= 8 || num_integers
!= 1 ||
996 strlen(key
) >= MZAP_NAME_LEN
) {
997 err
= mzap_upgrade(&zn
->zn_zap
, tx
, 0);
999 err
= fzap_add(zn
, integer_size
, num_integers
, val
, tx
);
1000 zap
= zn
->zn_zap
; /* fzap_add() may change zap */
1004 err
= SET_ERROR(EEXIST
);
1006 mzap_addent(zn
, *intval
);
1009 ASSERT(zap
== zn
->zn_zap
);
1011 if (zap
!= NULL
) /* may be NULL if fzap_add() failed */
1017 zap_add_uint64(objset_t
*os
, uint64_t zapobj
, const uint64_t *key
,
1018 int key_numints
, int integer_size
, uint64_t num_integers
,
1019 const void *val
, dmu_tx_t
*tx
)
1025 err
= zap_lockdir(os
, zapobj
, tx
, RW_WRITER
, TRUE
, TRUE
, &zap
);
1028 zn
= zap_name_alloc_uint64(zap
, key
, key_numints
);
1031 return (SET_ERROR(ENOTSUP
));
1033 err
= fzap_add(zn
, integer_size
, num_integers
, val
, tx
);
1034 zap
= zn
->zn_zap
; /* fzap_add() may change zap */
1036 if (zap
!= NULL
) /* may be NULL if fzap_add() failed */
1042 zap_update(objset_t
*os
, uint64_t zapobj
, const char *name
,
1043 int integer_size
, uint64_t num_integers
, const void *val
, dmu_tx_t
*tx
)
1047 const uint64_t *intval
= val
;
1055 * If there is an old value, it shouldn't change across the
1056 * lockdir (eg, due to bprewrite's xlation).
1058 if (integer_size
== 8 && num_integers
== 1)
1059 (void) zap_lookup(os
, zapobj
, name
, 8, 1, &oldval
);
1062 err
= zap_lockdir(os
, zapobj
, tx
, RW_WRITER
, TRUE
, TRUE
, &zap
);
1065 zn
= zap_name_alloc(zap
, name
, MT_EXACT
);
1068 return (SET_ERROR(ENOTSUP
));
1070 if (!zap
->zap_ismicro
) {
1071 err
= fzap_update(zn
, integer_size
, num_integers
, val
, tx
);
1072 zap
= zn
->zn_zap
; /* fzap_update() may change zap */
1073 } else if (integer_size
!= 8 || num_integers
!= 1 ||
1074 strlen(name
) >= MZAP_NAME_LEN
) {
1075 dprintf("upgrading obj %llu: intsz=%u numint=%llu name=%s\n",
1076 zapobj
, integer_size
, num_integers
, name
);
1077 err
= mzap_upgrade(&zn
->zn_zap
, tx
, 0);
1079 err
= fzap_update(zn
, integer_size
, num_integers
,
1081 zap
= zn
->zn_zap
; /* fzap_update() may change zap */
1085 ASSERT3U(MZE_PHYS(zap
, mze
)->mze_value
, ==, oldval
);
1086 MZE_PHYS(zap
, mze
)->mze_value
= *intval
;
1088 mzap_addent(zn
, *intval
);
1091 ASSERT(zap
== zn
->zn_zap
);
1093 if (zap
!= NULL
) /* may be NULL if fzap_upgrade() failed */
1099 zap_update_uint64(objset_t
*os
, uint64_t zapobj
, const uint64_t *key
,
1101 int integer_size
, uint64_t num_integers
, const void *val
, dmu_tx_t
*tx
)
1107 err
= zap_lockdir(os
, zapobj
, tx
, RW_WRITER
, TRUE
, TRUE
, &zap
);
1110 zn
= zap_name_alloc_uint64(zap
, key
, key_numints
);
1113 return (SET_ERROR(ENOTSUP
));
1115 err
= fzap_update(zn
, integer_size
, num_integers
, val
, tx
);
1116 zap
= zn
->zn_zap
; /* fzap_update() may change zap */
1118 if (zap
!= NULL
) /* may be NULL if fzap_upgrade() failed */
1124 zap_remove(objset_t
*os
, uint64_t zapobj
, const char *name
, dmu_tx_t
*tx
)
1126 return (zap_remove_norm(os
, zapobj
, name
, MT_EXACT
, tx
));
1130 zap_remove_norm(objset_t
*os
, uint64_t zapobj
, const char *name
,
1131 matchtype_t mt
, dmu_tx_t
*tx
)
1138 err
= zap_lockdir(os
, zapobj
, tx
, RW_WRITER
, TRUE
, FALSE
, &zap
);
1141 zn
= zap_name_alloc(zap
, name
, mt
);
1144 return (SET_ERROR(ENOTSUP
));
1146 if (!zap
->zap_ismicro
) {
1147 err
= fzap_remove(zn
, tx
);
1151 err
= SET_ERROR(ENOENT
);
1153 zap
->zap_m
.zap_num_entries
--;
1154 bzero(&zap_m_phys(zap
)->mz_chunk
[mze
->mze_chunkid
],
1155 sizeof (mzap_ent_phys_t
));
1156 mze_remove(zap
, mze
);
1165 zap_remove_uint64(objset_t
*os
, uint64_t zapobj
, const uint64_t *key
,
1166 int key_numints
, dmu_tx_t
*tx
)
1172 err
= zap_lockdir(os
, zapobj
, tx
, RW_WRITER
, TRUE
, FALSE
, &zap
);
1175 zn
= zap_name_alloc_uint64(zap
, key
, key_numints
);
1178 return (SET_ERROR(ENOTSUP
));
1180 err
= fzap_remove(zn
, tx
);
1187 * Routines for iterating over the attributes.
1191 zap_cursor_init_serialized(zap_cursor_t
*zc
, objset_t
*os
, uint64_t zapobj
,
1192 uint64_t serialized
)
1197 zc
->zc_zapobj
= zapobj
;
1198 zc
->zc_serialized
= serialized
;
1204 zap_cursor_init(zap_cursor_t
*zc
, objset_t
*os
, uint64_t zapobj
)
1206 zap_cursor_init_serialized(zc
, os
, zapobj
, 0);
1210 zap_cursor_fini(zap_cursor_t
*zc
)
1213 rw_enter(&zc
->zc_zap
->zap_rwlock
, RW_READER
);
1214 zap_unlockdir(zc
->zc_zap
);
1218 rw_enter(&zc
->zc_leaf
->l_rwlock
, RW_READER
);
1219 zap_put_leaf(zc
->zc_leaf
);
1222 zc
->zc_objset
= NULL
;
1226 zap_cursor_serialize(zap_cursor_t
*zc
)
1228 if (zc
->zc_hash
== -1ULL)
1230 if (zc
->zc_zap
== NULL
)
1231 return (zc
->zc_serialized
);
1232 ASSERT((zc
->zc_hash
& zap_maxcd(zc
->zc_zap
)) == 0);
1233 ASSERT(zc
->zc_cd
< zap_maxcd(zc
->zc_zap
));
1236 * We want to keep the high 32 bits of the cursor zero if we can, so
1237 * that 32-bit programs can access this. So usually use a small
1238 * (28-bit) hash value so we can fit 4 bits of cd into the low 32-bits
1241 * [ collision differentiator | zap_hashbits()-bit hash value ]
1243 return ((zc
->zc_hash
>> (64 - zap_hashbits(zc
->zc_zap
))) |
1244 ((uint64_t)zc
->zc_cd
<< zap_hashbits(zc
->zc_zap
)));
1248 zap_cursor_retrieve(zap_cursor_t
*zc
, zap_attribute_t
*za
)
1252 mzap_ent_t mze_tofind
;
1255 if (zc
->zc_hash
== -1ULL)
1256 return (SET_ERROR(ENOENT
));
1258 if (zc
->zc_zap
== NULL
) {
1260 err
= zap_lockdir(zc
->zc_objset
, zc
->zc_zapobj
, NULL
,
1261 RW_READER
, TRUE
, FALSE
, &zc
->zc_zap
);
1266 * To support zap_cursor_init_serialized, advance, retrieve,
1267 * we must add to the existing zc_cd, which may already
1268 * be 1 due to the zap_cursor_advance.
1270 ASSERT(zc
->zc_hash
== 0);
1271 hb
= zap_hashbits(zc
->zc_zap
);
1272 zc
->zc_hash
= zc
->zc_serialized
<< (64 - hb
);
1273 zc
->zc_cd
+= zc
->zc_serialized
>> hb
;
1274 if (zc
->zc_cd
>= zap_maxcd(zc
->zc_zap
)) /* corrupt serialized */
1277 rw_enter(&zc
->zc_zap
->zap_rwlock
, RW_READER
);
1279 if (!zc
->zc_zap
->zap_ismicro
) {
1280 err
= fzap_cursor_retrieve(zc
->zc_zap
, zc
, za
);
1282 mze_tofind
.mze_hash
= zc
->zc_hash
;
1283 mze_tofind
.mze_cd
= zc
->zc_cd
;
1285 mze
= avl_find(&zc
->zc_zap
->zap_m
.zap_avl
, &mze_tofind
, &idx
);
1287 mze
= avl_nearest(&zc
->zc_zap
->zap_m
.zap_avl
,
1291 mzap_ent_phys_t
*mzep
= MZE_PHYS(zc
->zc_zap
, mze
);
1292 ASSERT3U(mze
->mze_cd
, ==, mzep
->mze_cd
);
1293 za
->za_normalization_conflict
=
1294 mzap_normalization_conflict(zc
->zc_zap
, NULL
, mze
);
1295 za
->za_integer_length
= 8;
1296 za
->za_num_integers
= 1;
1297 za
->za_first_integer
= mzep
->mze_value
;
1298 (void) strcpy(za
->za_name
, mzep
->mze_name
);
1299 zc
->zc_hash
= mze
->mze_hash
;
1300 zc
->zc_cd
= mze
->mze_cd
;
1303 zc
->zc_hash
= -1ULL;
1304 err
= SET_ERROR(ENOENT
);
1307 rw_exit(&zc
->zc_zap
->zap_rwlock
);
1312 zap_cursor_advance(zap_cursor_t
*zc
)
1314 if (zc
->zc_hash
== -1ULL)
1320 zap_cursor_move_to_key(zap_cursor_t
*zc
, const char *name
, matchtype_t mt
)
1326 if (zc
->zc_zap
== NULL
) {
1327 err
= zap_lockdir(zc
->zc_objset
, zc
->zc_zapobj
, NULL
,
1328 RW_READER
, TRUE
, FALSE
, &zc
->zc_zap
);
1332 rw_enter(&zc
->zc_zap
->zap_rwlock
, RW_READER
);
1335 zn
= zap_name_alloc(zc
->zc_zap
, name
, mt
);
1337 rw_exit(&zc
->zc_zap
->zap_rwlock
);
1338 return (SET_ERROR(ENOTSUP
));
1341 if (!zc
->zc_zap
->zap_ismicro
) {
1342 err
= fzap_cursor_move_to_key(zc
, zn
);
1346 err
= SET_ERROR(ENOENT
);
1349 zc
->zc_hash
= mze
->mze_hash
;
1350 zc
->zc_cd
= mze
->mze_cd
;
1355 rw_exit(&zc
->zc_zap
->zap_rwlock
);
1360 zap_get_stats(objset_t
*os
, uint64_t zapobj
, zap_stats_t
*zs
)
1365 err
= zap_lockdir(os
, zapobj
, NULL
, RW_READER
, TRUE
, FALSE
, &zap
);
1369 bzero(zs
, sizeof (zap_stats_t
));
1371 if (zap
->zap_ismicro
) {
1372 zs
->zs_blocksize
= zap
->zap_dbuf
->db_size
;
1373 zs
->zs_num_entries
= zap
->zap_m
.zap_num_entries
;
1374 zs
->zs_num_blocks
= 1;
1376 fzap_get_stats(zap
, zs
);
1383 zap_count_write(objset_t
*os
, uint64_t zapobj
, const char *name
, int add
,
1384 uint64_t *towrite
, uint64_t *tooverwrite
)
1391 * Since, we don't have a name, we cannot figure out which blocks will
1392 * be affected in this operation. So, account for the worst case :
1393 * - 3 blocks overwritten: target leaf, ptrtbl block, header block
1394 * - 4 new blocks written if adding:
1395 * - 2 blocks for possibly split leaves,
1396 * - 2 grown ptrtbl blocks
1398 * This also accomodates the case where an add operation to a fairly
1399 * large microzap results in a promotion to fatzap.
1402 *towrite
+= (3 + (add
? 4 : 0)) * SPA_MAXBLOCKSIZE
;
1407 * We lock the zap with adding == FALSE. Because, if we pass
1408 * the actual value of add, it could trigger a mzap_upgrade().
1409 * At present we are just evaluating the possibility of this operation
1410 * and hence we donot want to trigger an upgrade.
1412 err
= zap_lockdir(os
, zapobj
, NULL
, RW_READER
, TRUE
, FALSE
, &zap
);
1416 if (!zap
->zap_ismicro
) {
1417 zap_name_t
*zn
= zap_name_alloc(zap
, name
, MT_EXACT
);
1419 err
= fzap_count_write(zn
, add
, towrite
,
1424 * We treat this case as similar to (name == NULL)
1426 *towrite
+= (3 + (add
? 4 : 0)) * SPA_MAXBLOCKSIZE
;
1430 * We are here if (name != NULL) and this is a micro-zap.
1431 * We account for the header block depending on whether it
1434 * Incase of an add-operation it is hard to find out
1435 * if this add will promote this microzap to fatzap.
1436 * Hence, we consider the worst case and account for the
1437 * blocks assuming this microzap would be promoted to a
1440 * 1 block overwritten : header block
1441 * 4 new blocks written : 2 new split leaf, 2 grown
1444 if (dmu_buf_freeable(zap
->zap_dbuf
))
1445 *tooverwrite
+= SPA_MAXBLOCKSIZE
;
1447 *towrite
+= SPA_MAXBLOCKSIZE
;
1450 *towrite
+= 4 * SPA_MAXBLOCKSIZE
;
1458 #if defined(_KERNEL) && defined(HAVE_SPL)
1459 EXPORT_SYMBOL(zap_create
);
1460 EXPORT_SYMBOL(zap_create_norm
);
1461 EXPORT_SYMBOL(zap_create_flags
);
1462 EXPORT_SYMBOL(zap_create_claim
);
1463 EXPORT_SYMBOL(zap_create_claim_norm
);
1464 EXPORT_SYMBOL(zap_destroy
);
1465 EXPORT_SYMBOL(zap_lookup
);
1466 EXPORT_SYMBOL(zap_lookup_norm
);
1467 EXPORT_SYMBOL(zap_lookup_uint64
);
1468 EXPORT_SYMBOL(zap_contains
);
1469 EXPORT_SYMBOL(zap_prefetch_uint64
);
1470 EXPORT_SYMBOL(zap_count_write
);
1471 EXPORT_SYMBOL(zap_add
);
1472 EXPORT_SYMBOL(zap_add_uint64
);
1473 EXPORT_SYMBOL(zap_update
);
1474 EXPORT_SYMBOL(zap_update_uint64
);
1475 EXPORT_SYMBOL(zap_length
);
1476 EXPORT_SYMBOL(zap_length_uint64
);
1477 EXPORT_SYMBOL(zap_remove
);
1478 EXPORT_SYMBOL(zap_remove_norm
);
1479 EXPORT_SYMBOL(zap_remove_uint64
);
1480 EXPORT_SYMBOL(zap_count
);
1481 EXPORT_SYMBOL(zap_value_search
);
1482 EXPORT_SYMBOL(zap_join
);
1483 EXPORT_SYMBOL(zap_join_increment
);
1484 EXPORT_SYMBOL(zap_add_int
);
1485 EXPORT_SYMBOL(zap_remove_int
);
1486 EXPORT_SYMBOL(zap_lookup_int
);
1487 EXPORT_SYMBOL(zap_increment_int
);
1488 EXPORT_SYMBOL(zap_add_int_key
);
1489 EXPORT_SYMBOL(zap_lookup_int_key
);
1490 EXPORT_SYMBOL(zap_increment
);
1491 EXPORT_SYMBOL(zap_cursor_init
);
1492 EXPORT_SYMBOL(zap_cursor_fini
);
1493 EXPORT_SYMBOL(zap_cursor_retrieve
);
1494 EXPORT_SYMBOL(zap_cursor_advance
);
1495 EXPORT_SYMBOL(zap_cursor_serialize
);
1496 EXPORT_SYMBOL(zap_cursor_move_to_key
);
1497 EXPORT_SYMBOL(zap_cursor_init_serialized
);
1498 EXPORT_SYMBOL(zap_get_stats
);