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]
23 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Copyright (c) 2011, 2016 by Delphix. All rights reserved.
25 * Copyright (c) 2014 Spectra Logic Corporation, All rights reserved.
26 * Copyright 2017 Nexenta Systems, Inc.
32 #include <sys/zfs_context.h>
34 #include <sys/refcount.h>
35 #include <sys/zap_impl.h>
36 #include <sys/zap_leaf.h>
39 #include <sys/dmu_objset.h>
42 #include <sys/sunddi.h>
45 extern inline mzap_phys_t *zap_m_phys(zap_t *zap);
47 static int mzap_upgrade(zap_t **zapp,
48 void *tag, dmu_tx_t *tx, zap_flags_t flags);
51 zap_getflags(zap_t *zap)
55 return (zap_f_phys(zap)->zap_flags);
59 zap_hashbits(zap_t *zap)
61 if (zap_getflags(zap) & ZAP_FLAG_HASH64)
70 if (zap_getflags(zap) & ZAP_FLAG_HASH64)
77 zap_hash(zap_name_t *zn)
79 zap_t *zap = zn->zn_zap;
82 if (zap_getflags(zap) & ZAP_FLAG_PRE_HASHED_KEY) {
83 ASSERT(zap_getflags(zap) & ZAP_FLAG_UINT64_KEY);
84 h = *(uint64_t *)zn->zn_key_orig;
88 ASSERT(zfs_crc64_table[128] == ZFS_CRC64_POLY);
90 if (zap_getflags(zap) & ZAP_FLAG_UINT64_KEY) {
92 const uint64_t *wp = zn->zn_key_norm;
94 ASSERT(zn->zn_key_intlen == 8);
95 for (i = 0; i < zn->zn_key_norm_numints; wp++, i++) {
99 for (j = 0; j < zn->zn_key_intlen; j++) {
101 zfs_crc64_table[(h ^ word) & 0xFF];
107 const uint8_t *cp = zn->zn_key_norm;
110 * We previously stored the terminating null on
111 * disk, but didn't hash it, so we need to
112 * continue to not hash it. (The
113 * zn_key_*_numints includes the terminating
114 * null for non-binary keys.)
116 len = zn->zn_key_norm_numints - 1;
118 ASSERT(zn->zn_key_intlen == 1);
119 for (i = 0; i < len; cp++, i++) {
121 zfs_crc64_table[(h ^ *cp) & 0xFF];
126 * Don't use all 64 bits, since we need some in the cookie for
127 * the collision differentiator. We MUST use the high bits,
128 * since those are the ones that we first pay attention to when
129 * choosing the bucket.
131 h &= ~((1ULL << (64 - zap_hashbits(zap))) - 1);
137 zap_normalize(zap_t *zap, const char *name, char *namenorm, int normflags)
139 size_t inlen, outlen;
142 ASSERT(!(zap_getflags(zap) & ZAP_FLAG_UINT64_KEY));
144 inlen = strlen(name) + 1;
145 outlen = ZAP_MAXNAMELEN;
148 (void) u8_textprep_str((char *)name, &inlen, namenorm, &outlen,
149 normflags | U8_TEXTPREP_IGNORE_NULL | U8_TEXTPREP_IGNORE_INVALID,
150 U8_UNICODE_LATEST, &err);
156 zap_match(zap_name_t *zn, const char *matchname)
158 ASSERT(!(zap_getflags(zn->zn_zap) & ZAP_FLAG_UINT64_KEY));
160 if (zn->zn_matchtype & MT_NORMALIZE) {
161 char norm[ZAP_MAXNAMELEN];
163 if (zap_normalize(zn->zn_zap, matchname, norm,
164 zn->zn_normflags) != 0)
167 return (strcmp(zn->zn_key_norm, norm) == 0);
169 return (strcmp(zn->zn_key_orig, matchname) == 0);
174 zap_name_free(zap_name_t *zn)
176 kmem_free(zn, sizeof (zap_name_t));
180 zap_name_alloc(zap_t *zap, const char *key, matchtype_t mt)
182 zap_name_t *zn = kmem_alloc(sizeof (zap_name_t), KM_SLEEP);
185 zn->zn_key_intlen = sizeof (*key);
186 zn->zn_key_orig = key;
187 zn->zn_key_orig_numints = strlen(zn->zn_key_orig) + 1;
188 zn->zn_matchtype = mt;
189 zn->zn_normflags = zap->zap_normflags;
192 * If we're dealing with a case sensitive lookup on a mixed or
193 * insensitive fs, remove U8_TEXTPREP_TOUPPER or the lookup
194 * will fold case to all caps overriding the lookup request.
196 if (mt & MT_MATCH_CASE)
197 zn->zn_normflags &= ~U8_TEXTPREP_TOUPPER;
199 if (zap->zap_normflags) {
201 * We *must* use zap_normflags because this normalization is
202 * what the hash is computed from.
204 if (zap_normalize(zap, key, zn->zn_normbuf,
205 zap->zap_normflags) != 0) {
209 zn->zn_key_norm = zn->zn_normbuf;
210 zn->zn_key_norm_numints = strlen(zn->zn_key_norm) + 1;
216 zn->zn_key_norm = zn->zn_key_orig;
217 zn->zn_key_norm_numints = zn->zn_key_orig_numints;
220 zn->zn_hash = zap_hash(zn);
222 if (zap->zap_normflags != zn->zn_normflags) {
224 * We *must* use zn_normflags because this normalization is
225 * what the matching is based on. (Not the hash!)
227 if (zap_normalize(zap, key, zn->zn_normbuf,
228 zn->zn_normflags) != 0) {
232 zn->zn_key_norm_numints = strlen(zn->zn_key_norm) + 1;
239 zap_name_alloc_uint64(zap_t *zap, const uint64_t *key, int numints)
241 zap_name_t *zn = kmem_alloc(sizeof (zap_name_t), KM_SLEEP);
243 ASSERT(zap->zap_normflags == 0);
245 zn->zn_key_intlen = sizeof (*key);
246 zn->zn_key_orig = zn->zn_key_norm = key;
247 zn->zn_key_orig_numints = zn->zn_key_norm_numints = numints;
248 zn->zn_matchtype = 0;
250 zn->zn_hash = zap_hash(zn);
255 mzap_byteswap(mzap_phys_t *buf, size_t size)
258 buf->mz_block_type = BSWAP_64(buf->mz_block_type);
259 buf->mz_salt = BSWAP_64(buf->mz_salt);
260 buf->mz_normflags = BSWAP_64(buf->mz_normflags);
261 max = (size / MZAP_ENT_LEN) - 1;
262 for (i = 0; i < max; i++) {
263 buf->mz_chunk[i].mze_value =
264 BSWAP_64(buf->mz_chunk[i].mze_value);
265 buf->mz_chunk[i].mze_cd =
266 BSWAP_32(buf->mz_chunk[i].mze_cd);
271 zap_byteswap(void *buf, size_t size)
275 block_type = *(uint64_t *)buf;
277 if (block_type == ZBT_MICRO || block_type == BSWAP_64(ZBT_MICRO)) {
278 /* ASSERT(magic == ZAP_LEAF_MAGIC); */
279 mzap_byteswap(buf, size);
281 fzap_byteswap(buf, size);
286 mze_compare(const void *arg1, const void *arg2)
288 const mzap_ent_t *mze1 = arg1;
289 const mzap_ent_t *mze2 = arg2;
291 int cmp = AVL_CMP(mze1->mze_hash, mze2->mze_hash);
295 return (AVL_CMP(mze1->mze_cd, mze2->mze_cd));
299 mze_insert(zap_t *zap, int chunkid, uint64_t hash)
303 ASSERT(zap->zap_ismicro);
304 ASSERT(RW_WRITE_HELD(&zap->zap_rwlock));
306 mze = kmem_alloc(sizeof (mzap_ent_t), KM_SLEEP);
307 mze->mze_chunkid = chunkid;
308 mze->mze_hash = hash;
309 mze->mze_cd = MZE_PHYS(zap, mze)->mze_cd;
310 ASSERT(MZE_PHYS(zap, mze)->mze_name[0] != 0);
311 avl_add(&zap->zap_m.zap_avl, mze);
315 mze_find(zap_name_t *zn)
317 mzap_ent_t mze_tofind;
320 avl_tree_t *avl = &zn->zn_zap->zap_m.zap_avl;
322 ASSERT(zn->zn_zap->zap_ismicro);
323 ASSERT(RW_LOCK_HELD(&zn->zn_zap->zap_rwlock));
325 mze_tofind.mze_hash = zn->zn_hash;
326 mze_tofind.mze_cd = 0;
328 mze = avl_find(avl, &mze_tofind, &idx);
330 mze = avl_nearest(avl, idx, AVL_AFTER);
331 for (; mze && mze->mze_hash == zn->zn_hash; mze = AVL_NEXT(avl, mze)) {
332 ASSERT3U(mze->mze_cd, ==, MZE_PHYS(zn->zn_zap, mze)->mze_cd);
333 if (zap_match(zn, MZE_PHYS(zn->zn_zap, mze)->mze_name))
341 mze_find_unused_cd(zap_t *zap, uint64_t hash)
343 mzap_ent_t mze_tofind;
346 avl_tree_t *avl = &zap->zap_m.zap_avl;
349 ASSERT(zap->zap_ismicro);
350 ASSERT(RW_LOCK_HELD(&zap->zap_rwlock));
352 mze_tofind.mze_hash = hash;
353 mze_tofind.mze_cd = 0;
356 for (mze = avl_find(avl, &mze_tofind, &idx);
357 mze && mze->mze_hash == hash; mze = AVL_NEXT(avl, mze)) {
358 if (mze->mze_cd != cd)
367 mze_remove(zap_t *zap, mzap_ent_t *mze)
369 ASSERT(zap->zap_ismicro);
370 ASSERT(RW_WRITE_HELD(&zap->zap_rwlock));
372 avl_remove(&zap->zap_m.zap_avl, mze);
373 kmem_free(mze, sizeof (mzap_ent_t));
377 mze_destroy(zap_t *zap)
380 void *avlcookie = NULL;
382 while ((mze = avl_destroy_nodes(&zap->zap_m.zap_avl, &avlcookie)))
383 kmem_free(mze, sizeof (mzap_ent_t));
384 avl_destroy(&zap->zap_m.zap_avl);
388 mzap_open(objset_t *os, uint64_t obj, dmu_buf_t *db)
393 uint64_t *zap_hdr = (uint64_t *)db->db_data;
394 uint64_t zap_block_type = zap_hdr[0];
395 uint64_t zap_magic = zap_hdr[1];
397 ASSERT3U(MZAP_ENT_LEN, ==, sizeof (mzap_ent_phys_t));
399 zap = kmem_zalloc(sizeof (zap_t), KM_SLEEP);
400 rw_init(&zap->zap_rwlock, NULL, RW_DEFAULT, NULL);
401 rw_enter(&zap->zap_rwlock, RW_WRITER);
402 zap->zap_objset = os;
403 zap->zap_object = obj;
406 if (zap_block_type != ZBT_MICRO) {
407 mutex_init(&zap->zap_f.zap_num_entries_mtx, 0, 0, 0);
408 zap->zap_f.zap_block_shift = highbit64(db->db_size) - 1;
409 if (zap_block_type != ZBT_HEADER || zap_magic != ZAP_MAGIC) {
410 winner = NULL; /* No actual winner here... */
414 zap->zap_ismicro = TRUE;
418 * Make sure that zap_ismicro is set before we let others see
419 * it, because zap_lockdir() checks zap_ismicro without the lock
422 dmu_buf_init_user(&zap->zap_dbu, zap_evict_sync, NULL, &zap->zap_dbuf);
423 winner = dmu_buf_set_user(db, &zap->zap_dbu);
428 if (zap->zap_ismicro) {
429 zap->zap_salt = zap_m_phys(zap)->mz_salt;
430 zap->zap_normflags = zap_m_phys(zap)->mz_normflags;
431 zap->zap_m.zap_num_chunks = db->db_size / MZAP_ENT_LEN - 1;
432 avl_create(&zap->zap_m.zap_avl, mze_compare,
433 sizeof (mzap_ent_t), offsetof(mzap_ent_t, mze_node));
435 for (i = 0; i < zap->zap_m.zap_num_chunks; i++) {
436 mzap_ent_phys_t *mze =
437 &zap_m_phys(zap)->mz_chunk[i];
438 if (mze->mze_name[0]) {
441 zap->zap_m.zap_num_entries++;
442 zn = zap_name_alloc(zap, mze->mze_name, 0);
443 mze_insert(zap, i, zn->zn_hash);
448 zap->zap_salt = zap_f_phys(zap)->zap_salt;
449 zap->zap_normflags = zap_f_phys(zap)->zap_normflags;
451 ASSERT3U(sizeof (struct zap_leaf_header), ==,
452 2*ZAP_LEAF_CHUNKSIZE);
455 * The embedded pointer table should not overlap the
458 ASSERT3P(&ZAP_EMBEDDED_PTRTBL_ENT(zap, 0), >,
459 &zap_f_phys(zap)->zap_salt);
462 * The embedded pointer table should end at the end of
465 ASSERT3U((uintptr_t)&ZAP_EMBEDDED_PTRTBL_ENT(zap,
466 1<<ZAP_EMBEDDED_PTRTBL_SHIFT(zap)) -
467 (uintptr_t)zap_f_phys(zap), ==,
468 zap->zap_dbuf->db_size);
470 rw_exit(&zap->zap_rwlock);
474 rw_exit(&zap->zap_rwlock);
475 rw_destroy(&zap->zap_rwlock);
476 if (!zap->zap_ismicro)
477 mutex_destroy(&zap->zap_f.zap_num_entries_mtx);
478 kmem_free(zap, sizeof (zap_t));
483 zap_lockdir_impl(dmu_buf_t *db, void *tag, dmu_tx_t *tx,
484 krw_t lti, boolean_t fatreader, boolean_t adding, zap_t **zapp)
486 dmu_object_info_t doi;
490 objset_t *os = dmu_buf_get_objset(db);
491 uint64_t obj = db->db_object;
493 ASSERT0(db->db_offset);
496 dmu_object_info_from_db(db, &doi);
497 if (DMU_OT_BYTESWAP(doi.doi_type) != DMU_BSWAP_ZAP)
498 return (SET_ERROR(EINVAL));
500 zap = dmu_buf_get_user(db);
502 zap = mzap_open(os, obj, db);
505 * mzap_open() didn't like what it saw on-disk.
506 * Check for corruption!
508 return (SET_ERROR(EIO));
513 * We're checking zap_ismicro without the lock held, in order to
514 * tell what type of lock we want. Once we have some sort of
515 * lock, see if it really is the right type. In practice this
516 * can only be different if it was upgraded from micro to fat,
517 * and micro wanted WRITER but fat only needs READER.
519 lt = (!zap->zap_ismicro && fatreader) ? RW_READER : lti;
520 rw_enter(&zap->zap_rwlock, lt);
521 if (lt != ((!zap->zap_ismicro && fatreader) ? RW_READER : lti)) {
522 /* it was upgraded, now we only need reader */
523 ASSERT(lt == RW_WRITER);
525 ((!zap->zap_ismicro && fatreader) ? RW_READER : lti));
526 rw_downgrade(&zap->zap_rwlock);
530 zap->zap_objset = os;
533 dmu_buf_will_dirty(db, tx);
535 ASSERT3P(zap->zap_dbuf, ==, db);
537 ASSERT(!zap->zap_ismicro ||
538 zap->zap_m.zap_num_entries <= zap->zap_m.zap_num_chunks);
539 if (zap->zap_ismicro && tx && adding &&
540 zap->zap_m.zap_num_entries == zap->zap_m.zap_num_chunks) {
541 uint64_t newsz = db->db_size + SPA_MINBLOCKSIZE;
542 if (newsz > MZAP_MAX_BLKSZ) {
544 dprintf("upgrading obj %llu: num_entries=%u\n",
545 obj, zap->zap_m.zap_num_entries);
547 err = mzap_upgrade(zapp, tag, tx, 0);
549 rw_exit(&zap->zap_rwlock);
552 VERIFY0(dmu_object_set_blocksize(os, obj, newsz, 0, tx));
553 zap->zap_m.zap_num_chunks =
554 db->db_size / MZAP_ENT_LEN - 1;
562 zap_lockdir_by_dnode(dnode_t *dn, dmu_tx_t *tx,
563 krw_t lti, boolean_t fatreader, boolean_t adding, void *tag, zap_t **zapp)
568 err = dmu_buf_hold_by_dnode(dn, 0, tag, &db, DMU_READ_NO_PREFETCH);
572 err = zap_lockdir_impl(db, tag, tx, lti, fatreader, adding, zapp);
574 dmu_buf_rele(db, tag);
580 zap_lockdir(objset_t *os, uint64_t obj, dmu_tx_t *tx,
581 krw_t lti, boolean_t fatreader, boolean_t adding, void *tag, zap_t **zapp)
586 err = dmu_buf_hold(os, obj, 0, tag, &db, DMU_READ_NO_PREFETCH);
589 err = zap_lockdir_impl(db, tag, tx, lti, fatreader, adding, zapp);
591 dmu_buf_rele(db, tag);
596 zap_unlockdir(zap_t *zap, void *tag)
598 rw_exit(&zap->zap_rwlock);
599 dmu_buf_rele(zap->zap_dbuf, tag);
603 mzap_upgrade(zap_t **zapp, void *tag, dmu_tx_t *tx, zap_flags_t flags)
610 ASSERT(RW_WRITE_HELD(&zap->zap_rwlock));
612 sz = zap->zap_dbuf->db_size;
613 mzp = vmem_alloc(sz, KM_SLEEP);
614 bcopy(zap->zap_dbuf->db_data, mzp, sz);
615 nchunks = zap->zap_m.zap_num_chunks;
618 err = dmu_object_set_blocksize(zap->zap_objset, zap->zap_object,
619 1ULL << fzap_default_block_shift, 0, tx);
626 dprintf("upgrading obj=%llu with %u chunks\n",
627 zap->zap_object, nchunks);
628 /* XXX destroy the avl later, so we can use the stored hash value */
631 fzap_upgrade(zap, tx, flags);
633 for (i = 0; i < nchunks; i++) {
634 mzap_ent_phys_t *mze = &mzp->mz_chunk[i];
636 if (mze->mze_name[0] == 0)
638 dprintf("adding %s=%llu\n",
639 mze->mze_name, mze->mze_value);
640 zn = zap_name_alloc(zap, mze->mze_name, 0);
641 err = fzap_add_cd(zn, 8, 1, &mze->mze_value, mze->mze_cd,
643 zap = zn->zn_zap; /* fzap_add_cd() may change zap */
654 * The "normflags" determine the behavior of the matchtype_t which is
655 * passed to zap_lookup_norm(). Names which have the same normalized
656 * version will be stored with the same hash value, and therefore we can
657 * perform normalization-insensitive lookups. We can be Unicode form-
658 * insensitive and/or case-insensitive. The following flags are valid for
665 * U8_TEXTPREP_TOUPPER
667 * The *_NF* (Normalization Form) flags are mutually exclusive; at most one
668 * of them may be supplied.
671 mzap_create_impl(objset_t *os, uint64_t obj, int normflags, zap_flags_t flags,
677 VERIFY(0 == dmu_buf_hold(os, obj, 0, FTAG, &db, DMU_READ_NO_PREFETCH));
681 dmu_object_info_t doi;
682 dmu_object_info_from_db(db, &doi);
683 ASSERT3U(DMU_OT_BYTESWAP(doi.doi_type), ==, DMU_BSWAP_ZAP);
687 dmu_buf_will_dirty(db, tx);
689 zp->mz_block_type = ZBT_MICRO;
690 zp->mz_salt = ((uintptr_t)db ^ (uintptr_t)tx ^ (obj << 1)) | 1ULL;
691 zp->mz_normflags = normflags;
692 dmu_buf_rele(db, FTAG);
696 /* Only fat zap supports flags; upgrade immediately. */
697 VERIFY(0 == zap_lockdir(os, obj, tx, RW_WRITER,
698 B_FALSE, B_FALSE, FTAG, &zap));
699 VERIFY3U(0, ==, mzap_upgrade(&zap, FTAG, tx, flags));
700 zap_unlockdir(zap, FTAG);
705 zap_create_claim(objset_t *os, uint64_t obj, dmu_object_type_t ot,
706 dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx)
708 return (zap_create_claim_dnsize(os, obj, ot, bonustype, bonuslen,
713 zap_create_claim_dnsize(objset_t *os, uint64_t obj, dmu_object_type_t ot,
714 dmu_object_type_t bonustype, int bonuslen, int dnodesize, dmu_tx_t *tx)
716 return (zap_create_claim_norm_dnsize(os, obj,
717 0, ot, bonustype, bonuslen, dnodesize, tx));
721 zap_create_claim_norm(objset_t *os, uint64_t obj, int normflags,
722 dmu_object_type_t ot,
723 dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx)
725 return (zap_create_claim_norm_dnsize(os, obj, normflags, ot, bonustype,
730 zap_create_claim_norm_dnsize(objset_t *os, uint64_t obj, int normflags,
731 dmu_object_type_t ot, dmu_object_type_t bonustype, int bonuslen,
732 int dnodesize, dmu_tx_t *tx)
736 err = dmu_object_claim_dnsize(os, obj, ot, 0, bonustype, bonuslen,
740 mzap_create_impl(os, obj, normflags, 0, tx);
745 zap_create(objset_t *os, dmu_object_type_t ot,
746 dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx)
748 return (zap_create_norm(os, 0, ot, bonustype, bonuslen, tx));
752 zap_create_dnsize(objset_t *os, dmu_object_type_t ot,
753 dmu_object_type_t bonustype, int bonuslen, int dnodesize, dmu_tx_t *tx)
755 return (zap_create_norm_dnsize(os, 0, ot, bonustype, bonuslen,
760 zap_create_norm(objset_t *os, int normflags, dmu_object_type_t ot,
761 dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx)
763 return (zap_create_norm_dnsize(os, normflags, ot, bonustype, bonuslen,
768 zap_create_norm_dnsize(objset_t *os, int normflags, dmu_object_type_t ot,
769 dmu_object_type_t bonustype, int bonuslen, int dnodesize, dmu_tx_t *tx)
771 uint64_t obj = dmu_object_alloc_dnsize(os, ot, 0, bonustype, bonuslen,
774 mzap_create_impl(os, obj, normflags, 0, tx);
779 zap_create_flags(objset_t *os, int normflags, zap_flags_t flags,
780 dmu_object_type_t ot, int leaf_blockshift, int indirect_blockshift,
781 dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx)
783 return (zap_create_flags_dnsize(os, normflags, flags, ot,
784 leaf_blockshift, indirect_blockshift, bonustype, bonuslen, 0, tx));
788 zap_create_flags_dnsize(objset_t *os, int normflags, zap_flags_t flags,
789 dmu_object_type_t ot, int leaf_blockshift, int indirect_blockshift,
790 dmu_object_type_t bonustype, int bonuslen, int dnodesize, dmu_tx_t *tx)
792 uint64_t obj = dmu_object_alloc_dnsize(os, ot, 0, bonustype, bonuslen,
795 ASSERT(leaf_blockshift >= SPA_MINBLOCKSHIFT &&
796 leaf_blockshift <= SPA_OLD_MAXBLOCKSHIFT &&
797 indirect_blockshift >= SPA_MINBLOCKSHIFT &&
798 indirect_blockshift <= SPA_OLD_MAXBLOCKSHIFT);
800 VERIFY(dmu_object_set_blocksize(os, obj,
801 1ULL << leaf_blockshift, indirect_blockshift, tx) == 0);
803 mzap_create_impl(os, obj, normflags, flags, tx);
808 zap_destroy(objset_t *os, uint64_t zapobj, dmu_tx_t *tx)
811 * dmu_object_free will free the object number and free the
812 * data. Freeing the data will cause our pageout function to be
813 * called, which will destroy our data (zap_leaf_t's and zap_t).
816 return (dmu_object_free(os, zapobj, tx));
820 zap_evict_sync(void *dbu)
824 rw_destroy(&zap->zap_rwlock);
826 if (zap->zap_ismicro)
829 mutex_destroy(&zap->zap_f.zap_num_entries_mtx);
831 kmem_free(zap, sizeof (zap_t));
835 zap_count(objset_t *os, uint64_t zapobj, uint64_t *count)
840 err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, FTAG, &zap);
843 if (!zap->zap_ismicro) {
844 err = fzap_count(zap, count);
846 *count = zap->zap_m.zap_num_entries;
848 zap_unlockdir(zap, FTAG);
853 * zn may be NULL; if not specified, it will be computed if needed.
854 * See also the comment above zap_entry_normalization_conflict().
857 mzap_normalization_conflict(zap_t *zap, zap_name_t *zn, mzap_ent_t *mze)
860 int direction = AVL_BEFORE;
861 boolean_t allocdzn = B_FALSE;
863 if (zap->zap_normflags == 0)
867 for (other = avl_walk(&zap->zap_m.zap_avl, mze, direction);
868 other && other->mze_hash == mze->mze_hash;
869 other = avl_walk(&zap->zap_m.zap_avl, other, direction)) {
872 zn = zap_name_alloc(zap, MZE_PHYS(zap, mze)->mze_name,
876 if (zap_match(zn, MZE_PHYS(zap, other)->mze_name)) {
883 if (direction == AVL_BEFORE) {
884 direction = AVL_AFTER;
894 * Routines for manipulating attributes.
898 zap_lookup(objset_t *os, uint64_t zapobj, const char *name,
899 uint64_t integer_size, uint64_t num_integers, void *buf)
901 return (zap_lookup_norm(os, zapobj, name, integer_size,
902 num_integers, buf, 0, NULL, 0, NULL));
906 zap_lookup_impl(zap_t *zap, const char *name,
907 uint64_t integer_size, uint64_t num_integers, void *buf,
908 matchtype_t mt, char *realname, int rn_len,
915 zn = zap_name_alloc(zap, name, mt);
917 return (SET_ERROR(ENOTSUP));
919 if (!zap->zap_ismicro) {
920 err = fzap_lookup(zn, integer_size, num_integers, buf,
921 realname, rn_len, ncp);
925 err = SET_ERROR(ENOENT);
927 if (num_integers < 1) {
928 err = SET_ERROR(EOVERFLOW);
929 } else if (integer_size != 8) {
930 err = SET_ERROR(EINVAL);
933 MZE_PHYS(zap, mze)->mze_value;
934 (void) strlcpy(realname,
935 MZE_PHYS(zap, mze)->mze_name, rn_len);
937 *ncp = mzap_normalization_conflict(zap,
948 zap_lookup_norm(objset_t *os, uint64_t zapobj, const char *name,
949 uint64_t integer_size, uint64_t num_integers, void *buf,
950 matchtype_t mt, char *realname, int rn_len,
956 err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, FTAG, &zap);
959 err = zap_lookup_impl(zap, name, integer_size,
960 num_integers, buf, mt, realname, rn_len, ncp);
961 zap_unlockdir(zap, FTAG);
966 zap_prefetch(objset_t *os, uint64_t zapobj, const char *name)
972 err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, FTAG, &zap);
975 zn = zap_name_alloc(zap, name, 0);
977 zap_unlockdir(zap, FTAG);
978 return (SET_ERROR(ENOTSUP));
983 zap_unlockdir(zap, FTAG);
988 zap_lookup_by_dnode(dnode_t *dn, const char *name,
989 uint64_t integer_size, uint64_t num_integers, void *buf)
991 return (zap_lookup_norm_by_dnode(dn, name, integer_size,
992 num_integers, buf, 0, NULL, 0, NULL));
996 zap_lookup_norm_by_dnode(dnode_t *dn, const char *name,
997 uint64_t integer_size, uint64_t num_integers, void *buf,
998 matchtype_t mt, char *realname, int rn_len,
1004 err = zap_lockdir_by_dnode(dn, NULL, RW_READER, TRUE, FALSE,
1008 err = zap_lookup_impl(zap, name, integer_size,
1009 num_integers, buf, mt, realname, rn_len, ncp);
1010 zap_unlockdir(zap, FTAG);
1015 zap_prefetch_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key,
1022 err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, FTAG, &zap);
1025 zn = zap_name_alloc_uint64(zap, key, key_numints);
1027 zap_unlockdir(zap, FTAG);
1028 return (SET_ERROR(ENOTSUP));
1033 zap_unlockdir(zap, FTAG);
1038 zap_lookup_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key,
1039 int key_numints, uint64_t integer_size, uint64_t num_integers, void *buf)
1045 err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, FTAG, &zap);
1048 zn = zap_name_alloc_uint64(zap, key, key_numints);
1050 zap_unlockdir(zap, FTAG);
1051 return (SET_ERROR(ENOTSUP));
1054 err = fzap_lookup(zn, integer_size, num_integers, buf,
1057 zap_unlockdir(zap, FTAG);
1062 zap_contains(objset_t *os, uint64_t zapobj, const char *name)
1064 int err = zap_lookup_norm(os, zapobj, name, 0,
1065 0, NULL, 0, NULL, 0, NULL);
1066 if (err == EOVERFLOW || err == EINVAL)
1067 err = 0; /* found, but skipped reading the value */
1072 zap_length(objset_t *os, uint64_t zapobj, const char *name,
1073 uint64_t *integer_size, uint64_t *num_integers)
1080 err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, FTAG, &zap);
1083 zn = zap_name_alloc(zap, name, 0);
1085 zap_unlockdir(zap, FTAG);
1086 return (SET_ERROR(ENOTSUP));
1088 if (!zap->zap_ismicro) {
1089 err = fzap_length(zn, integer_size, num_integers);
1093 err = SET_ERROR(ENOENT);
1102 zap_unlockdir(zap, FTAG);
1107 zap_length_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key,
1108 int key_numints, uint64_t *integer_size, uint64_t *num_integers)
1114 err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, FTAG, &zap);
1117 zn = zap_name_alloc_uint64(zap, key, key_numints);
1119 zap_unlockdir(zap, FTAG);
1120 return (SET_ERROR(ENOTSUP));
1122 err = fzap_length(zn, integer_size, num_integers);
1124 zap_unlockdir(zap, FTAG);
1129 mzap_addent(zap_name_t *zn, uint64_t value)
1132 zap_t *zap = zn->zn_zap;
1133 int start = zap->zap_m.zap_alloc_next;
1136 ASSERT(RW_WRITE_HELD(&zap->zap_rwlock));
1139 for (i = 0; i < zap->zap_m.zap_num_chunks; i++) {
1140 ASSERTV(mzap_ent_phys_t *mze);
1141 ASSERT(mze = &zap_m_phys(zap)->mz_chunk[i]);
1142 ASSERT(strcmp(zn->zn_key_orig, mze->mze_name) != 0);
1146 cd = mze_find_unused_cd(zap, zn->zn_hash);
1147 /* given the limited size of the microzap, this can't happen */
1148 ASSERT(cd < zap_maxcd(zap));
1151 for (i = start; i < zap->zap_m.zap_num_chunks; i++) {
1152 mzap_ent_phys_t *mze = &zap_m_phys(zap)->mz_chunk[i];
1153 if (mze->mze_name[0] == 0) {
1154 mze->mze_value = value;
1156 (void) strlcpy(mze->mze_name, zn->zn_key_orig,
1157 sizeof (mze->mze_name));
1158 zap->zap_m.zap_num_entries++;
1159 zap->zap_m.zap_alloc_next = i+1;
1160 if (zap->zap_m.zap_alloc_next ==
1161 zap->zap_m.zap_num_chunks)
1162 zap->zap_m.zap_alloc_next = 0;
1163 mze_insert(zap, i, zn->zn_hash);
1171 cmn_err(CE_PANIC, "out of entries!");
1175 zap_add_impl(zap_t *zap, const char *key,
1176 int integer_size, uint64_t num_integers,
1177 const void *val, dmu_tx_t *tx, void *tag)
1181 const uint64_t *intval = val;
1184 zn = zap_name_alloc(zap, key, 0);
1186 zap_unlockdir(zap, tag);
1187 return (SET_ERROR(ENOTSUP));
1189 if (!zap->zap_ismicro) {
1190 err = fzap_add(zn, integer_size, num_integers, val, tag, tx);
1191 zap = zn->zn_zap; /* fzap_add() may change zap */
1192 } else if (integer_size != 8 || num_integers != 1 ||
1193 strlen(key) >= MZAP_NAME_LEN) {
1194 err = mzap_upgrade(&zn->zn_zap, tag, tx, 0);
1196 err = fzap_add(zn, integer_size, num_integers, val,
1199 zap = zn->zn_zap; /* fzap_add() may change zap */
1203 err = SET_ERROR(EEXIST);
1205 mzap_addent(zn, *intval);
1208 ASSERT(zap == zn->zn_zap);
1210 if (zap != NULL) /* may be NULL if fzap_add() failed */
1211 zap_unlockdir(zap, tag);
1216 zap_add(objset_t *os, uint64_t zapobj, const char *key,
1217 int integer_size, uint64_t num_integers,
1218 const void *val, dmu_tx_t *tx)
1223 err = zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, TRUE, FTAG, &zap);
1226 err = zap_add_impl(zap, key, integer_size, num_integers, val, tx, FTAG);
1227 /* zap_add_impl() calls zap_unlockdir() */
1232 zap_add_by_dnode(dnode_t *dn, const char *key,
1233 int integer_size, uint64_t num_integers,
1234 const void *val, dmu_tx_t *tx)
1239 err = zap_lockdir_by_dnode(dn, tx, RW_WRITER, TRUE, TRUE, FTAG, &zap);
1242 err = zap_add_impl(zap, key, integer_size, num_integers, val, tx, FTAG);
1243 /* zap_add_impl() calls zap_unlockdir() */
1248 zap_add_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key,
1249 int key_numints, int integer_size, uint64_t num_integers,
1250 const void *val, dmu_tx_t *tx)
1256 err = zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, TRUE, FTAG, &zap);
1259 zn = zap_name_alloc_uint64(zap, key, key_numints);
1261 zap_unlockdir(zap, FTAG);
1262 return (SET_ERROR(ENOTSUP));
1264 err = fzap_add(zn, integer_size, num_integers, val, FTAG, tx);
1265 zap = zn->zn_zap; /* fzap_add() may change zap */
1267 if (zap != NULL) /* may be NULL if fzap_add() failed */
1268 zap_unlockdir(zap, FTAG);
1273 zap_update(objset_t *os, uint64_t zapobj, const char *name,
1274 int integer_size, uint64_t num_integers, const void *val, dmu_tx_t *tx)
1278 const uint64_t *intval = val;
1286 * If there is an old value, it shouldn't change across the
1287 * lockdir (eg, due to bprewrite's xlation).
1289 if (integer_size == 8 && num_integers == 1)
1290 (void) zap_lookup(os, zapobj, name, 8, 1, &oldval);
1293 err = zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, TRUE, FTAG, &zap);
1296 zn = zap_name_alloc(zap, name, 0);
1298 zap_unlockdir(zap, FTAG);
1299 return (SET_ERROR(ENOTSUP));
1301 if (!zap->zap_ismicro) {
1302 err = fzap_update(zn, integer_size, num_integers, val,
1304 zap = zn->zn_zap; /* fzap_update() may change zap */
1305 } else if (integer_size != 8 || num_integers != 1 ||
1306 strlen(name) >= MZAP_NAME_LEN) {
1307 dprintf("upgrading obj %llu: intsz=%u numint=%llu name=%s\n",
1308 zapobj, integer_size, num_integers, name);
1309 err = mzap_upgrade(&zn->zn_zap, FTAG, tx, 0);
1311 err = fzap_update(zn, integer_size, num_integers,
1314 zap = zn->zn_zap; /* fzap_update() may change zap */
1318 ASSERT3U(MZE_PHYS(zap, mze)->mze_value, ==, oldval);
1319 MZE_PHYS(zap, mze)->mze_value = *intval;
1321 mzap_addent(zn, *intval);
1324 ASSERT(zap == zn->zn_zap);
1326 if (zap != NULL) /* may be NULL if fzap_upgrade() failed */
1327 zap_unlockdir(zap, FTAG);
1332 zap_update_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key,
1334 int integer_size, uint64_t num_integers, const void *val, dmu_tx_t *tx)
1340 err = zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, TRUE, FTAG, &zap);
1343 zn = zap_name_alloc_uint64(zap, key, key_numints);
1345 zap_unlockdir(zap, FTAG);
1346 return (SET_ERROR(ENOTSUP));
1348 err = fzap_update(zn, integer_size, num_integers, val, FTAG, tx);
1349 zap = zn->zn_zap; /* fzap_update() may change zap */
1351 if (zap != NULL) /* may be NULL if fzap_upgrade() failed */
1352 zap_unlockdir(zap, FTAG);
1357 zap_remove(objset_t *os, uint64_t zapobj, const char *name, dmu_tx_t *tx)
1359 return (zap_remove_norm(os, zapobj, name, 0, tx));
1363 zap_remove_impl(zap_t *zap, const char *name,
1364 matchtype_t mt, dmu_tx_t *tx)
1370 zn = zap_name_alloc(zap, name, mt);
1372 return (SET_ERROR(ENOTSUP));
1373 if (!zap->zap_ismicro) {
1374 err = fzap_remove(zn, tx);
1378 err = SET_ERROR(ENOENT);
1380 zap->zap_m.zap_num_entries--;
1381 bzero(&zap_m_phys(zap)->mz_chunk[mze->mze_chunkid],
1382 sizeof (mzap_ent_phys_t));
1383 mze_remove(zap, mze);
1391 zap_remove_norm(objset_t *os, uint64_t zapobj, const char *name,
1392 matchtype_t mt, dmu_tx_t *tx)
1397 err = zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, FALSE, FTAG, &zap);
1400 err = zap_remove_impl(zap, name, mt, tx);
1401 zap_unlockdir(zap, FTAG);
1406 zap_remove_by_dnode(dnode_t *dn, const char *name, dmu_tx_t *tx)
1411 err = zap_lockdir_by_dnode(dn, tx, RW_WRITER, TRUE, FALSE, FTAG, &zap);
1414 err = zap_remove_impl(zap, name, 0, tx);
1415 zap_unlockdir(zap, FTAG);
1420 zap_remove_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key,
1421 int key_numints, dmu_tx_t *tx)
1427 err = zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, FALSE, FTAG, &zap);
1430 zn = zap_name_alloc_uint64(zap, key, key_numints);
1432 zap_unlockdir(zap, FTAG);
1433 return (SET_ERROR(ENOTSUP));
1435 err = fzap_remove(zn, tx);
1437 zap_unlockdir(zap, FTAG);
1442 * Routines for iterating over the attributes.
1446 zap_cursor_init_serialized(zap_cursor_t *zc, objset_t *os, uint64_t zapobj,
1447 uint64_t serialized)
1452 zc->zc_zapobj = zapobj;
1453 zc->zc_serialized = serialized;
1459 zap_cursor_init(zap_cursor_t *zc, objset_t *os, uint64_t zapobj)
1461 zap_cursor_init_serialized(zc, os, zapobj, 0);
1465 zap_cursor_fini(zap_cursor_t *zc)
1468 rw_enter(&zc->zc_zap->zap_rwlock, RW_READER);
1469 zap_unlockdir(zc->zc_zap, NULL);
1473 rw_enter(&zc->zc_leaf->l_rwlock, RW_READER);
1474 zap_put_leaf(zc->zc_leaf);
1477 zc->zc_objset = NULL;
1481 zap_cursor_serialize(zap_cursor_t *zc)
1483 if (zc->zc_hash == -1ULL)
1485 if (zc->zc_zap == NULL)
1486 return (zc->zc_serialized);
1487 ASSERT((zc->zc_hash & zap_maxcd(zc->zc_zap)) == 0);
1488 ASSERT(zc->zc_cd < zap_maxcd(zc->zc_zap));
1491 * We want to keep the high 32 bits of the cursor zero if we can, so
1492 * that 32-bit programs can access this. So usually use a small
1493 * (28-bit) hash value so we can fit 4 bits of cd into the low 32-bits
1496 * [ collision differentiator | zap_hashbits()-bit hash value ]
1498 return ((zc->zc_hash >> (64 - zap_hashbits(zc->zc_zap))) |
1499 ((uint64_t)zc->zc_cd << zap_hashbits(zc->zc_zap)));
1503 zap_cursor_retrieve(zap_cursor_t *zc, zap_attribute_t *za)
1507 mzap_ent_t mze_tofind;
1510 if (zc->zc_hash == -1ULL)
1511 return (SET_ERROR(ENOENT));
1513 if (zc->zc_zap == NULL) {
1515 err = zap_lockdir(zc->zc_objset, zc->zc_zapobj, NULL,
1516 RW_READER, TRUE, FALSE, NULL, &zc->zc_zap);
1521 * To support zap_cursor_init_serialized, advance, retrieve,
1522 * we must add to the existing zc_cd, which may already
1523 * be 1 due to the zap_cursor_advance.
1525 ASSERT(zc->zc_hash == 0);
1526 hb = zap_hashbits(zc->zc_zap);
1527 zc->zc_hash = zc->zc_serialized << (64 - hb);
1528 zc->zc_cd += zc->zc_serialized >> hb;
1529 if (zc->zc_cd >= zap_maxcd(zc->zc_zap)) /* corrupt serialized */
1532 rw_enter(&zc->zc_zap->zap_rwlock, RW_READER);
1534 if (!zc->zc_zap->zap_ismicro) {
1535 err = fzap_cursor_retrieve(zc->zc_zap, zc, za);
1537 mze_tofind.mze_hash = zc->zc_hash;
1538 mze_tofind.mze_cd = zc->zc_cd;
1540 mze = avl_find(&zc->zc_zap->zap_m.zap_avl, &mze_tofind, &idx);
1542 mze = avl_nearest(&zc->zc_zap->zap_m.zap_avl,
1546 mzap_ent_phys_t *mzep = MZE_PHYS(zc->zc_zap, mze);
1547 ASSERT3U(mze->mze_cd, ==, mzep->mze_cd);
1548 za->za_normalization_conflict =
1549 mzap_normalization_conflict(zc->zc_zap, NULL, mze);
1550 za->za_integer_length = 8;
1551 za->za_num_integers = 1;
1552 za->za_first_integer = mzep->mze_value;
1553 (void) strcpy(za->za_name, mzep->mze_name);
1554 zc->zc_hash = mze->mze_hash;
1555 zc->zc_cd = mze->mze_cd;
1558 zc->zc_hash = -1ULL;
1559 err = SET_ERROR(ENOENT);
1562 rw_exit(&zc->zc_zap->zap_rwlock);
1567 zap_cursor_advance(zap_cursor_t *zc)
1569 if (zc->zc_hash == -1ULL)
1575 zap_get_stats(objset_t *os, uint64_t zapobj, zap_stats_t *zs)
1580 err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, FTAG, &zap);
1584 bzero(zs, sizeof (zap_stats_t));
1586 if (zap->zap_ismicro) {
1587 zs->zs_blocksize = zap->zap_dbuf->db_size;
1588 zs->zs_num_entries = zap->zap_m.zap_num_entries;
1589 zs->zs_num_blocks = 1;
1591 fzap_get_stats(zap, zs);
1593 zap_unlockdir(zap, FTAG);
1597 #if defined(_KERNEL) && defined(HAVE_SPL)
1598 EXPORT_SYMBOL(zap_create);
1599 EXPORT_SYMBOL(zap_create_dnsize);
1600 EXPORT_SYMBOL(zap_create_norm);
1601 EXPORT_SYMBOL(zap_create_norm_dnsize);
1602 EXPORT_SYMBOL(zap_create_flags);
1603 EXPORT_SYMBOL(zap_create_flags_dnsize);
1604 EXPORT_SYMBOL(zap_create_claim);
1605 EXPORT_SYMBOL(zap_create_claim_norm);
1606 EXPORT_SYMBOL(zap_create_claim_norm_dnsize);
1607 EXPORT_SYMBOL(zap_destroy);
1608 EXPORT_SYMBOL(zap_lookup);
1609 EXPORT_SYMBOL(zap_lookup_by_dnode);
1610 EXPORT_SYMBOL(zap_lookup_norm);
1611 EXPORT_SYMBOL(zap_lookup_uint64);
1612 EXPORT_SYMBOL(zap_contains);
1613 EXPORT_SYMBOL(zap_prefetch);
1614 EXPORT_SYMBOL(zap_prefetch_uint64);
1615 EXPORT_SYMBOL(zap_add);
1616 EXPORT_SYMBOL(zap_add_by_dnode);
1617 EXPORT_SYMBOL(zap_add_uint64);
1618 EXPORT_SYMBOL(zap_update);
1619 EXPORT_SYMBOL(zap_update_uint64);
1620 EXPORT_SYMBOL(zap_length);
1621 EXPORT_SYMBOL(zap_length_uint64);
1622 EXPORT_SYMBOL(zap_remove);
1623 EXPORT_SYMBOL(zap_remove_by_dnode);
1624 EXPORT_SYMBOL(zap_remove_norm);
1625 EXPORT_SYMBOL(zap_remove_uint64);
1626 EXPORT_SYMBOL(zap_count);
1627 EXPORT_SYMBOL(zap_value_search);
1628 EXPORT_SYMBOL(zap_join);
1629 EXPORT_SYMBOL(zap_join_increment);
1630 EXPORT_SYMBOL(zap_add_int);
1631 EXPORT_SYMBOL(zap_remove_int);
1632 EXPORT_SYMBOL(zap_lookup_int);
1633 EXPORT_SYMBOL(zap_increment_int);
1634 EXPORT_SYMBOL(zap_add_int_key);
1635 EXPORT_SYMBOL(zap_lookup_int_key);
1636 EXPORT_SYMBOL(zap_increment);
1637 EXPORT_SYMBOL(zap_cursor_init);
1638 EXPORT_SYMBOL(zap_cursor_fini);
1639 EXPORT_SYMBOL(zap_cursor_retrieve);
1640 EXPORT_SYMBOL(zap_cursor_advance);
1641 EXPORT_SYMBOL(zap_cursor_serialize);
1642 EXPORT_SYMBOL(zap_cursor_init_serialized);
1643 EXPORT_SYMBOL(zap_get_stats);