zap_micro.c revision de8267e0f723ed2c38ea9def92d465f69a300f56
fa9e4066f08beec538e775443c5be79dd423fcabahrens/*
fa9e4066f08beec538e775443c5be79dd423fcabahrens * CDDL HEADER START
fa9e4066f08beec538e775443c5be79dd423fcabahrens *
fa9e4066f08beec538e775443c5be79dd423fcabahrens * The contents of this file are subject to the terms of the
f65e61c04bc28ffd6bda04619c84330b420450b5ahrens * Common Development and Distribution License (the "License").
f65e61c04bc28ffd6bda04619c84330b420450b5ahrens * You may not use this file except in compliance with the License.
fa9e4066f08beec538e775443c5be79dd423fcabahrens *
fa9e4066f08beec538e775443c5be79dd423fcabahrens * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
fa9e4066f08beec538e775443c5be79dd423fcabahrens * or http://www.opensolaris.org/os/licensing.
fa9e4066f08beec538e775443c5be79dd423fcabahrens * See the License for the specific language governing permissions
fa9e4066f08beec538e775443c5be79dd423fcabahrens * and limitations under the License.
fa9e4066f08beec538e775443c5be79dd423fcabahrens *
fa9e4066f08beec538e775443c5be79dd423fcabahrens * When distributing Covered Code, include this CDDL HEADER in each
fa9e4066f08beec538e775443c5be79dd423fcabahrens * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
fa9e4066f08beec538e775443c5be79dd423fcabahrens * If applicable, add the following below this CDDL HEADER, with the
fa9e4066f08beec538e775443c5be79dd423fcabahrens * fields enclosed by brackets "[]" replaced with your own identifying
fa9e4066f08beec538e775443c5be79dd423fcabahrens * information: Portions Copyright [yyyy] [name of copyright owner]
fa9e4066f08beec538e775443c5be79dd423fcabahrens *
fa9e4066f08beec538e775443c5be79dd423fcabahrens * CDDL HEADER END
fa9e4066f08beec538e775443c5be79dd423fcabahrens */
fa9e4066f08beec538e775443c5be79dd423fcabahrens/*
c25056de36a33f2a76f79dcf64593f731d258013gw * Copyright 2007 Sun Microsystems, Inc. All rights reserved.
fa9e4066f08beec538e775443c5be79dd423fcabahrens * Use is subject to license terms.
fa9e4066f08beec538e775443c5be79dd423fcabahrens */
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens#pragma ident "%Z%%M% %I% %E% SMI"
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens#include <sys/spa.h>
fa9e4066f08beec538e775443c5be79dd423fcabahrens#include <sys/dmu.h>
fa9e4066f08beec538e775443c5be79dd423fcabahrens#include <sys/zfs_context.h>
fa9e4066f08beec538e775443c5be79dd423fcabahrens#include <sys/zap.h>
ea8dc4b6d2251b437950c0056bc626b311c73c27eschrock#include <sys/refcount.h>
fa9e4066f08beec538e775443c5be79dd423fcabahrens#include <sys/zap_impl.h>
87e5029a3226958edab1512d6182bc74d8d80c9aahrens#include <sys/zap_leaf.h>
fa9e4066f08beec538e775443c5be79dd423fcabahrens#include <sys/avl.h>
de8267e0f723ed2c38ea9def92d465f69a300f56timh
de8267e0f723ed2c38ea9def92d465f69a300f56timh#ifdef _KERNEL
de8267e0f723ed2c38ea9def92d465f69a300f56timh#include <sys/sunddi.h>
de8267e0f723ed2c38ea9def92d465f69a300f56timh#endif
fa9e4066f08beec538e775443c5be79dd423fcabahrens
ad860c82b2a8ffe69f42630da73ded0c92a7a36ebonwickstatic int mzap_upgrade(zap_t **zapp, dmu_tx_t *tx);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amwstatic uint64_t
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amwzap_hash(zap_t *zap, const char *normname)
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw{
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw const uint8_t *cp;
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw uint8_t c;
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw uint64_t crc = zap->zap_salt;
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw /* NB: name must already be normalized, if necessary */
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw ASSERT(crc != 0);
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw ASSERT(zfs_crc64_table[128] == ZFS_CRC64_POLY);
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw for (cp = (const uint8_t *)normname; (c = *cp) != '\0'; cp++) {
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw crc = (crc >> 8) ^ zfs_crc64_table[(crc ^ c) & 0xFF];
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw }
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw /*
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw * Only use 28 bits, since we need 4 bits in the cookie for the
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw * collision differentiator. We MUST use the high bits, since
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw * those are the ones that we first pay attention to when
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw * chosing the bucket.
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw */
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw crc &= ~((1ULL << (64 - ZAP_HASHBITS)) - 1);
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw return (crc);
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw}
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amwstatic int
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amwzap_normalize(zap_t *zap, const char *name, char *namenorm)
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw{
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw size_t inlen, outlen;
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw int err;
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw inlen = strlen(name) + 1;
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw outlen = ZAP_MAXNAMELEN;
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw err = 0;
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw (void) u8_textprep_str((char *)name, &inlen, namenorm, &outlen,
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw zap->zap_normflags | U8_TEXTPREP_IGNORE_NULL, U8_UNICODE_LATEST,
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw &err);
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw return (err);
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw}
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amwboolean_t
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amwzap_match(zap_name_t *zn, const char *matchname)
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw{
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw if (zn->zn_matchtype == MT_FIRST) {
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw char norm[ZAP_MAXNAMELEN];
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw if (zap_normalize(zn->zn_zap, matchname, norm) != 0)
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw return (B_FALSE);
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw return (strcmp(zn->zn_name_norm, norm) == 0);
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw } else {
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw /* MT_BEST or MT_EXACT */
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw return (strcmp(zn->zn_name_orij, matchname) == 0);
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw }
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw}
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amwvoid
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amwzap_name_free(zap_name_t *zn)
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw{
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw kmem_free(zn, sizeof (zap_name_t));
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw}
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw/* XXX combine this with zap_lockdir()? */
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amwzap_name_t *
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amwzap_name_alloc(zap_t *zap, const char *name, matchtype_t mt)
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw{
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw zap_name_t *zn = kmem_alloc(sizeof (zap_name_t), KM_SLEEP);
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw zn->zn_zap = zap;
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw zn->zn_name_orij = name;
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw zn->zn_matchtype = mt;
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw if (zap->zap_normflags) {
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw if (zap_normalize(zap, name, zn->zn_normbuf) != 0) {
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw zap_name_free(zn);
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw return (NULL);
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw }
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw zn->zn_name_norm = zn->zn_normbuf;
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw } else {
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw if (mt != MT_EXACT) {
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw zap_name_free(zn);
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw return (NULL);
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw }
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw zn->zn_name_norm = zn->zn_name_orij;
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw }
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw zn->zn_hash = zap_hash(zap, zn->zn_name_norm);
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw return (zn);
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw}
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw
fa9e4066f08beec538e775443c5be79dd423fcabahrensstatic void
fa9e4066f08beec538e775443c5be79dd423fcabahrensmzap_byteswap(mzap_phys_t *buf, size_t size)
fa9e4066f08beec538e775443c5be79dd423fcabahrens{
fa9e4066f08beec538e775443c5be79dd423fcabahrens int i, max;
fa9e4066f08beec538e775443c5be79dd423fcabahrens buf->mz_block_type = BSWAP_64(buf->mz_block_type);
fa9e4066f08beec538e775443c5be79dd423fcabahrens buf->mz_salt = BSWAP_64(buf->mz_salt);
fa9e4066f08beec538e775443c5be79dd423fcabahrens max = (size / MZAP_ENT_LEN) - 1;
fa9e4066f08beec538e775443c5be79dd423fcabahrens for (i = 0; i < max; i++) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens buf->mz_chunk[i].mze_value =
fa9e4066f08beec538e775443c5be79dd423fcabahrens BSWAP_64(buf->mz_chunk[i].mze_value);
fa9e4066f08beec538e775443c5be79dd423fcabahrens buf->mz_chunk[i].mze_cd =
fa9e4066f08beec538e775443c5be79dd423fcabahrens BSWAP_32(buf->mz_chunk[i].mze_cd);
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens}
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrensvoid
fa9e4066f08beec538e775443c5be79dd423fcabahrenszap_byteswap(void *buf, size_t size)
fa9e4066f08beec538e775443c5be79dd423fcabahrens{
fa9e4066f08beec538e775443c5be79dd423fcabahrens uint64_t block_type;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens block_type = *(uint64_t *)buf;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
5ad820458efd0fdb914baff9c1447c22b819fa23nd if (block_type == ZBT_MICRO || block_type == BSWAP_64(ZBT_MICRO)) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens /* ASSERT(magic == ZAP_LEAF_MAGIC); */
fa9e4066f08beec538e775443c5be79dd423fcabahrens mzap_byteswap(buf, size);
5ad820458efd0fdb914baff9c1447c22b819fa23nd } else {
fa9e4066f08beec538e775443c5be79dd423fcabahrens fzap_byteswap(buf, size);
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens}
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrensstatic int
fa9e4066f08beec538e775443c5be79dd423fcabahrensmze_compare(const void *arg1, const void *arg2)
fa9e4066f08beec538e775443c5be79dd423fcabahrens{
fa9e4066f08beec538e775443c5be79dd423fcabahrens const mzap_ent_t *mze1 = arg1;
fa9e4066f08beec538e775443c5be79dd423fcabahrens const mzap_ent_t *mze2 = arg2;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (mze1->mze_hash > mze2->mze_hash)
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (+1);
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (mze1->mze_hash < mze2->mze_hash)
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (-1);
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (mze1->mze_phys.mze_cd > mze2->mze_phys.mze_cd)
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (+1);
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (mze1->mze_phys.mze_cd < mze2->mze_phys.mze_cd)
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (-1);
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (0);
fa9e4066f08beec538e775443c5be79dd423fcabahrens}
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrensstatic void
fa9e4066f08beec538e775443c5be79dd423fcabahrensmze_insert(zap_t *zap, int chunkid, uint64_t hash, mzap_ent_phys_t *mzep)
fa9e4066f08beec538e775443c5be79dd423fcabahrens{
fa9e4066f08beec538e775443c5be79dd423fcabahrens mzap_ent_t *mze;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT(zap->zap_ismicro);
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT(RW_WRITE_HELD(&zap->zap_rwlock));
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT(mzep->mze_cd < ZAP_MAXCD);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens mze = kmem_alloc(sizeof (mzap_ent_t), KM_SLEEP);
fa9e4066f08beec538e775443c5be79dd423fcabahrens mze->mze_chunkid = chunkid;
fa9e4066f08beec538e775443c5be79dd423fcabahrens mze->mze_hash = hash;
fa9e4066f08beec538e775443c5be79dd423fcabahrens mze->mze_phys = *mzep;
fa9e4066f08beec538e775443c5be79dd423fcabahrens avl_add(&zap->zap_m.zap_avl, mze);
fa9e4066f08beec538e775443c5be79dd423fcabahrens}
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrensstatic mzap_ent_t *
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amwmze_find(zap_name_t *zn)
fa9e4066f08beec538e775443c5be79dd423fcabahrens{
fa9e4066f08beec538e775443c5be79dd423fcabahrens mzap_ent_t mze_tofind;
fa9e4066f08beec538e775443c5be79dd423fcabahrens mzap_ent_t *mze;
fa9e4066f08beec538e775443c5be79dd423fcabahrens avl_index_t idx;
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw avl_tree_t *avl = &zn->zn_zap->zap_m.zap_avl;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw ASSERT(zn->zn_zap->zap_ismicro);
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw ASSERT(RW_LOCK_HELD(&zn->zn_zap->zap_rwlock));
fa9e4066f08beec538e775443c5be79dd423fcabahrens
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw if (strlen(zn->zn_name_norm) >= sizeof (mze_tofind.mze_phys.mze_name))
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (NULL);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw mze_tofind.mze_hash = zn->zn_hash;
fa9e4066f08beec538e775443c5be79dd423fcabahrens mze_tofind.mze_phys.mze_cd = 0;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amwagain:
fa9e4066f08beec538e775443c5be79dd423fcabahrens mze = avl_find(avl, &mze_tofind, &idx);
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (mze == NULL)
fa9e4066f08beec538e775443c5be79dd423fcabahrens mze = avl_nearest(avl, idx, AVL_AFTER);
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw for (; mze && mze->mze_hash == zn->zn_hash; mze = AVL_NEXT(avl, mze)) {
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw if (zap_match(zn, mze->mze_phys.mze_name))
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (mze);
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw if (zn->zn_matchtype == MT_BEST) {
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw zn->zn_matchtype = MT_FIRST;
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw goto again;
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw }
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (NULL);
fa9e4066f08beec538e775443c5be79dd423fcabahrens}
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrensstatic uint32_t
fa9e4066f08beec538e775443c5be79dd423fcabahrensmze_find_unused_cd(zap_t *zap, uint64_t hash)
fa9e4066f08beec538e775443c5be79dd423fcabahrens{
fa9e4066f08beec538e775443c5be79dd423fcabahrens mzap_ent_t mze_tofind;
fa9e4066f08beec538e775443c5be79dd423fcabahrens mzap_ent_t *mze;
fa9e4066f08beec538e775443c5be79dd423fcabahrens avl_index_t idx;
fa9e4066f08beec538e775443c5be79dd423fcabahrens avl_tree_t *avl = &zap->zap_m.zap_avl;
fa9e4066f08beec538e775443c5be79dd423fcabahrens uint32_t cd;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT(zap->zap_ismicro);
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT(RW_LOCK_HELD(&zap->zap_rwlock));
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens mze_tofind.mze_hash = hash;
fa9e4066f08beec538e775443c5be79dd423fcabahrens mze_tofind.mze_phys.mze_cd = 0;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens cd = 0;
fa9e4066f08beec538e775443c5be79dd423fcabahrens for (mze = avl_find(avl, &mze_tofind, &idx);
fa9e4066f08beec538e775443c5be79dd423fcabahrens mze && mze->mze_hash == hash; mze = AVL_NEXT(avl, mze)) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (mze->mze_phys.mze_cd != cd)
fa9e4066f08beec538e775443c5be79dd423fcabahrens break;
fa9e4066f08beec538e775443c5be79dd423fcabahrens cd++;
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (cd);
fa9e4066f08beec538e775443c5be79dd423fcabahrens}
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrensstatic void
fa9e4066f08beec538e775443c5be79dd423fcabahrensmze_remove(zap_t *zap, mzap_ent_t *mze)
fa9e4066f08beec538e775443c5be79dd423fcabahrens{
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT(zap->zap_ismicro);
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT(RW_WRITE_HELD(&zap->zap_rwlock));
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens avl_remove(&zap->zap_m.zap_avl, mze);
fa9e4066f08beec538e775443c5be79dd423fcabahrens kmem_free(mze, sizeof (mzap_ent_t));
fa9e4066f08beec538e775443c5be79dd423fcabahrens}
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrensstatic void
fa9e4066f08beec538e775443c5be79dd423fcabahrensmze_destroy(zap_t *zap)
fa9e4066f08beec538e775443c5be79dd423fcabahrens{
fa9e4066f08beec538e775443c5be79dd423fcabahrens mzap_ent_t *mze;
fa9e4066f08beec538e775443c5be79dd423fcabahrens void *avlcookie = NULL;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens while (mze = avl_destroy_nodes(&zap->zap_m.zap_avl, &avlcookie))
fa9e4066f08beec538e775443c5be79dd423fcabahrens kmem_free(mze, sizeof (mzap_ent_t));
fa9e4066f08beec538e775443c5be79dd423fcabahrens avl_destroy(&zap->zap_m.zap_avl);
fa9e4066f08beec538e775443c5be79dd423fcabahrens}
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrensstatic zap_t *
fa9e4066f08beec538e775443c5be79dd423fcabahrensmzap_open(objset_t *os, uint64_t obj, dmu_buf_t *db)
fa9e4066f08beec538e775443c5be79dd423fcabahrens{
fa9e4066f08beec538e775443c5be79dd423fcabahrens zap_t *winner;
fa9e4066f08beec538e775443c5be79dd423fcabahrens zap_t *zap;
fa9e4066f08beec538e775443c5be79dd423fcabahrens int i;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT3U(MZAP_ENT_LEN, ==, sizeof (mzap_ent_phys_t));
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens zap = kmem_zalloc(sizeof (zap_t), KM_SLEEP);
fa9e4066f08beec538e775443c5be79dd423fcabahrens rw_init(&zap->zap_rwlock, 0, 0, 0);
fa9e4066f08beec538e775443c5be79dd423fcabahrens rw_enter(&zap->zap_rwlock, RW_WRITER);
fa9e4066f08beec538e775443c5be79dd423fcabahrens zap->zap_objset = os;
fa9e4066f08beec538e775443c5be79dd423fcabahrens zap->zap_object = obj;
fa9e4066f08beec538e775443c5be79dd423fcabahrens zap->zap_dbuf = db;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw if (*(uint64_t *)db->db_data != ZBT_MICRO) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens mutex_init(&zap->zap_f.zap_num_entries_mtx, 0, 0, 0);
f65e61c04bc28ffd6bda04619c84330b420450b5ahrens zap->zap_f.zap_block_shift = highbit(db->db_size) - 1;
fa9e4066f08beec538e775443c5be79dd423fcabahrens } else {
fa9e4066f08beec538e775443c5be79dd423fcabahrens zap->zap_ismicro = TRUE;
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens /*
fa9e4066f08beec538e775443c5be79dd423fcabahrens * Make sure that zap_ismicro is set before we let others see
fa9e4066f08beec538e775443c5be79dd423fcabahrens * it, because zap_lockdir() checks zap_ismicro without the lock
fa9e4066f08beec538e775443c5be79dd423fcabahrens * held.
fa9e4066f08beec538e775443c5be79dd423fcabahrens */
455d5089097abbf7ee4538a03c4df823497b6e68ahrens winner = dmu_buf_set_user(db, zap, &zap->zap_m.zap_phys, zap_evict);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (winner != NULL) {
c25056de36a33f2a76f79dcf64593f731d258013gw rw_exit(&zap->zap_rwlock);
c25056de36a33f2a76f79dcf64593f731d258013gw rw_destroy(&zap->zap_rwlock);
c25056de36a33f2a76f79dcf64593f731d258013gw if (!zap->zap_ismicro)
c25056de36a33f2a76f79dcf64593f731d258013gw mutex_destroy(&zap->zap_f.zap_num_entries_mtx);
fa9e4066f08beec538e775443c5be79dd423fcabahrens kmem_free(zap, sizeof (zap_t));
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (winner);
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (zap->zap_ismicro) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens zap->zap_salt = zap->zap_m.zap_phys->mz_salt;
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw zap->zap_normflags = zap->zap_m.zap_phys->mz_normflags;
fa9e4066f08beec538e775443c5be79dd423fcabahrens zap->zap_m.zap_num_chunks = db->db_size / MZAP_ENT_LEN - 1;
fa9e4066f08beec538e775443c5be79dd423fcabahrens avl_create(&zap->zap_m.zap_avl, mze_compare,
fa9e4066f08beec538e775443c5be79dd423fcabahrens sizeof (mzap_ent_t), offsetof(mzap_ent_t, mze_node));
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens for (i = 0; i < zap->zap_m.zap_num_chunks; i++) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens mzap_ent_phys_t *mze =
fa9e4066f08beec538e775443c5be79dd423fcabahrens &zap->zap_m.zap_phys->mz_chunk[i];
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (mze->mze_name[0]) {
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw zap_name_t *zn;
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw
fa9e4066f08beec538e775443c5be79dd423fcabahrens zap->zap_m.zap_num_entries++;
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw zn = zap_name_alloc(zap, mze->mze_name,
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw MT_EXACT);
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw mze_insert(zap, i, zn->zn_hash, mze);
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw zap_name_free(zn);
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens } else {
fa9e4066f08beec538e775443c5be79dd423fcabahrens zap->zap_salt = zap->zap_f.zap_phys->zap_salt;
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw zap->zap_normflags = zap->zap_f.zap_phys->zap_normflags;
f65e61c04bc28ffd6bda04619c84330b420450b5ahrens
f65e61c04bc28ffd6bda04619c84330b420450b5ahrens ASSERT3U(sizeof (struct zap_leaf_header), ==,
f65e61c04bc28ffd6bda04619c84330b420450b5ahrens 2*ZAP_LEAF_CHUNKSIZE);
f65e61c04bc28ffd6bda04619c84330b420450b5ahrens
f65e61c04bc28ffd6bda04619c84330b420450b5ahrens /*
f65e61c04bc28ffd6bda04619c84330b420450b5ahrens * The embedded pointer table should not overlap the
f65e61c04bc28ffd6bda04619c84330b420450b5ahrens * other members.
f65e61c04bc28ffd6bda04619c84330b420450b5ahrens */
f65e61c04bc28ffd6bda04619c84330b420450b5ahrens ASSERT3P(&ZAP_EMBEDDED_PTRTBL_ENT(zap, 0), >,
f65e61c04bc28ffd6bda04619c84330b420450b5ahrens &zap->zap_f.zap_phys->zap_salt);
f65e61c04bc28ffd6bda04619c84330b420450b5ahrens
f65e61c04bc28ffd6bda04619c84330b420450b5ahrens /*
f65e61c04bc28ffd6bda04619c84330b420450b5ahrens * The embedded pointer table should end at the end of
f65e61c04bc28ffd6bda04619c84330b420450b5ahrens * the block
f65e61c04bc28ffd6bda04619c84330b420450b5ahrens */
f65e61c04bc28ffd6bda04619c84330b420450b5ahrens ASSERT3U((uintptr_t)&ZAP_EMBEDDED_PTRTBL_ENT(zap,
f65e61c04bc28ffd6bda04619c84330b420450b5ahrens 1<<ZAP_EMBEDDED_PTRTBL_SHIFT(zap)) -
f65e61c04bc28ffd6bda04619c84330b420450b5ahrens (uintptr_t)zap->zap_f.zap_phys, ==,
f65e61c04bc28ffd6bda04619c84330b420450b5ahrens zap->zap_dbuf->db_size);
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens rw_exit(&zap->zap_rwlock);
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (zap);
fa9e4066f08beec538e775443c5be79dd423fcabahrens}
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrensint
fa9e4066f08beec538e775443c5be79dd423fcabahrenszap_lockdir(objset_t *os, uint64_t obj, dmu_tx_t *tx,
c5f9e43110e1fb316fc4297c2d150b3518b80bbeahrens krw_t lti, boolean_t fatreader, boolean_t adding, zap_t **zapp)
fa9e4066f08beec538e775443c5be79dd423fcabahrens{
fa9e4066f08beec538e775443c5be79dd423fcabahrens zap_t *zap;
fa9e4066f08beec538e775443c5be79dd423fcabahrens dmu_buf_t *db;
fa9e4066f08beec538e775443c5be79dd423fcabahrens krw_t lt;
fa9e4066f08beec538e775443c5be79dd423fcabahrens int err;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens *zapp = NULL;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
ea8dc4b6d2251b437950c0056bc626b311c73c27eschrock err = dmu_buf_hold(os, obj, 0, NULL, &db);
ea8dc4b6d2251b437950c0056bc626b311c73c27eschrock if (err)
ea8dc4b6d2251b437950c0056bc626b311c73c27eschrock return (err);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens#ifdef ZFS_DEBUG
fa9e4066f08beec538e775443c5be79dd423fcabahrens {
fa9e4066f08beec538e775443c5be79dd423fcabahrens dmu_object_info_t doi;
fa9e4066f08beec538e775443c5be79dd423fcabahrens dmu_object_info_from_db(db, &doi);
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT(dmu_ot[doi.doi_type].ot_byteswap == zap_byteswap);
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens#endif
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens zap = dmu_buf_get_user(db);
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (zap == NULL)
fa9e4066f08beec538e775443c5be79dd423fcabahrens zap = mzap_open(os, obj, db);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens /*
fa9e4066f08beec538e775443c5be79dd423fcabahrens * We're checking zap_ismicro without the lock held, in order to
fa9e4066f08beec538e775443c5be79dd423fcabahrens * tell what type of lock we want. Once we have some sort of
fa9e4066f08beec538e775443c5be79dd423fcabahrens * lock, see if it really is the right type. In practice this
fa9e4066f08beec538e775443c5be79dd423fcabahrens * can only be different if it was upgraded from micro to fat,
fa9e4066f08beec538e775443c5be79dd423fcabahrens * and micro wanted WRITER but fat only needs READER.
fa9e4066f08beec538e775443c5be79dd423fcabahrens */
fa9e4066f08beec538e775443c5be79dd423fcabahrens lt = (!zap->zap_ismicro && fatreader) ? RW_READER : lti;
fa9e4066f08beec538e775443c5be79dd423fcabahrens rw_enter(&zap->zap_rwlock, lt);
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (lt != ((!zap->zap_ismicro && fatreader) ? RW_READER : lti)) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens /* it was upgraded, now we only need reader */
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT(lt == RW_WRITER);
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT(RW_READER ==
fa9e4066f08beec538e775443c5be79dd423fcabahrens (!zap->zap_ismicro && fatreader) ? RW_READER : lti);
fa9e4066f08beec538e775443c5be79dd423fcabahrens rw_downgrade(&zap->zap_rwlock);
fa9e4066f08beec538e775443c5be79dd423fcabahrens lt = RW_READER;
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens zap->zap_objset = os;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (lt == RW_WRITER)
fa9e4066f08beec538e775443c5be79dd423fcabahrens dmu_buf_will_dirty(db, tx);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT3P(zap->zap_dbuf, ==, db);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT(!zap->zap_ismicro ||
fa9e4066f08beec538e775443c5be79dd423fcabahrens zap->zap_m.zap_num_entries <= zap->zap_m.zap_num_chunks);
c5f9e43110e1fb316fc4297c2d150b3518b80bbeahrens if (zap->zap_ismicro && tx && adding &&
fa9e4066f08beec538e775443c5be79dd423fcabahrens zap->zap_m.zap_num_entries == zap->zap_m.zap_num_chunks) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens uint64_t newsz = db->db_size + SPA_MINBLOCKSIZE;
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (newsz > MZAP_MAX_BLKSZ) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens dprintf("upgrading obj %llu: num_entries=%u\n",
fa9e4066f08beec538e775443c5be79dd423fcabahrens obj, zap->zap_m.zap_num_entries);
fa9e4066f08beec538e775443c5be79dd423fcabahrens *zapp = zap;
ad860c82b2a8ffe69f42630da73ded0c92a7a36ebonwick return (mzap_upgrade(zapp, tx));
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens err = dmu_object_set_blocksize(os, obj, newsz, 0, tx);
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT3U(err, ==, 0);
fa9e4066f08beec538e775443c5be79dd423fcabahrens zap->zap_m.zap_num_chunks =
fa9e4066f08beec538e775443c5be79dd423fcabahrens db->db_size / MZAP_ENT_LEN - 1;
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens *zapp = zap;
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (0);
fa9e4066f08beec538e775443c5be79dd423fcabahrens}
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrensvoid
fa9e4066f08beec538e775443c5be79dd423fcabahrenszap_unlockdir(zap_t *zap)
fa9e4066f08beec538e775443c5be79dd423fcabahrens{
fa9e4066f08beec538e775443c5be79dd423fcabahrens rw_exit(&zap->zap_rwlock);
ea8dc4b6d2251b437950c0056bc626b311c73c27eschrock dmu_buf_rele(zap->zap_dbuf, NULL);
fa9e4066f08beec538e775443c5be79dd423fcabahrens}
fa9e4066f08beec538e775443c5be79dd423fcabahrens
ad860c82b2a8ffe69f42630da73ded0c92a7a36ebonwickstatic int
ad860c82b2a8ffe69f42630da73ded0c92a7a36ebonwickmzap_upgrade(zap_t **zapp, dmu_tx_t *tx)
fa9e4066f08beec538e775443c5be79dd423fcabahrens{
fa9e4066f08beec538e775443c5be79dd423fcabahrens mzap_phys_t *mzp;
fa9e4066f08beec538e775443c5be79dd423fcabahrens int i, sz, nchunks, err;
ad860c82b2a8ffe69f42630da73ded0c92a7a36ebonwick zap_t *zap = *zapp;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT(RW_WRITE_HELD(&zap->zap_rwlock));
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens sz = zap->zap_dbuf->db_size;
fa9e4066f08beec538e775443c5be79dd423fcabahrens mzp = kmem_alloc(sz, KM_SLEEP);
fa9e4066f08beec538e775443c5be79dd423fcabahrens bcopy(zap->zap_dbuf->db_data, mzp, sz);
fa9e4066f08beec538e775443c5be79dd423fcabahrens nchunks = zap->zap_m.zap_num_chunks;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens err = dmu_object_set_blocksize(zap->zap_objset, zap->zap_object,
f65e61c04bc28ffd6bda04619c84330b420450b5ahrens 1ULL << fzap_default_block_shift, 0, tx);
ad860c82b2a8ffe69f42630da73ded0c92a7a36ebonwick if (err) {
ad860c82b2a8ffe69f42630da73ded0c92a7a36ebonwick kmem_free(mzp, sz);
ad860c82b2a8ffe69f42630da73ded0c92a7a36ebonwick return (err);
ad860c82b2a8ffe69f42630da73ded0c92a7a36ebonwick }
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens dprintf("upgrading obj=%llu with %u chunks\n",
fa9e4066f08beec538e775443c5be79dd423fcabahrens zap->zap_object, nchunks);
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw /* XXX destroy the avl later, so we can use the stored hash value */
fa9e4066f08beec538e775443c5be79dd423fcabahrens mze_destroy(zap);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens fzap_upgrade(zap, tx);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens for (i = 0; i < nchunks; i++) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens int err;
fa9e4066f08beec538e775443c5be79dd423fcabahrens mzap_ent_phys_t *mze = &mzp->mz_chunk[i];
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw zap_name_t *zn;
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (mze->mze_name[0] == 0)
fa9e4066f08beec538e775443c5be79dd423fcabahrens continue;
fa9e4066f08beec538e775443c5be79dd423fcabahrens dprintf("adding %s=%llu\n",
fa9e4066f08beec538e775443c5be79dd423fcabahrens mze->mze_name, mze->mze_value);
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw zn = zap_name_alloc(zap, mze->mze_name, MT_EXACT);
ad860c82b2a8ffe69f42630da73ded0c92a7a36ebonwick err = fzap_add_cd(zn, 8, 1, &mze->mze_value, mze->mze_cd, tx);
ad860c82b2a8ffe69f42630da73ded0c92a7a36ebonwick zap = zn->zn_zap; /* fzap_add_cd() may change zap */
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw zap_name_free(zn);
ad860c82b2a8ffe69f42630da73ded0c92a7a36ebonwick if (err)
ad860c82b2a8ffe69f42630da73ded0c92a7a36ebonwick break;
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens kmem_free(mzp, sz);
ad860c82b2a8ffe69f42630da73ded0c92a7a36ebonwick *zapp = zap;
ad860c82b2a8ffe69f42630da73ded0c92a7a36ebonwick return (err);
fa9e4066f08beec538e775443c5be79dd423fcabahrens}
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrensstatic void
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amwmzap_create_impl(objset_t *os, uint64_t obj, int normflags, dmu_tx_t *tx)
fa9e4066f08beec538e775443c5be79dd423fcabahrens{
fa9e4066f08beec538e775443c5be79dd423fcabahrens dmu_buf_t *db;
fa9e4066f08beec538e775443c5be79dd423fcabahrens mzap_phys_t *zp;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
ea8dc4b6d2251b437950c0056bc626b311c73c27eschrock VERIFY(0 == dmu_buf_hold(os, obj, 0, FTAG, &db));
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens#ifdef ZFS_DEBUG
fa9e4066f08beec538e775443c5be79dd423fcabahrens {
fa9e4066f08beec538e775443c5be79dd423fcabahrens dmu_object_info_t doi;
fa9e4066f08beec538e775443c5be79dd423fcabahrens dmu_object_info_from_db(db, &doi);
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT(dmu_ot[doi.doi_type].ot_byteswap == zap_byteswap);
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens#endif
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens dmu_buf_will_dirty(db, tx);
fa9e4066f08beec538e775443c5be79dd423fcabahrens zp = db->db_data;
fa9e4066f08beec538e775443c5be79dd423fcabahrens zp->mz_block_type = ZBT_MICRO;
fa9e4066f08beec538e775443c5be79dd423fcabahrens zp->mz_salt = ((uintptr_t)db ^ (uintptr_t)tx ^ (obj << 1)) | 1ULL;
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw zp->mz_normflags = normflags;
ea8dc4b6d2251b437950c0056bc626b311c73c27eschrock dmu_buf_rele(db, FTAG);
fa9e4066f08beec538e775443c5be79dd423fcabahrens}
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrensint
fa9e4066f08beec538e775443c5be79dd423fcabahrenszap_create_claim(objset_t *os, uint64_t obj, dmu_object_type_t ot,
fa9e4066f08beec538e775443c5be79dd423fcabahrens dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx)
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw{
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw return (zap_create_claim_norm(os, obj,
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw 0, ot, bonustype, bonuslen, tx));
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw}
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amwint
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amwzap_create_claim_norm(objset_t *os, uint64_t obj, int normflags,
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw dmu_object_type_t ot,
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx)
fa9e4066f08beec538e775443c5be79dd423fcabahrens{
fa9e4066f08beec538e775443c5be79dd423fcabahrens int err;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens err = dmu_object_claim(os, obj, ot, 0, bonustype, bonuslen, tx);
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (err != 0)
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (err);
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw mzap_create_impl(os, obj, normflags, tx);
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (0);
fa9e4066f08beec538e775443c5be79dd423fcabahrens}
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrensuint64_t
fa9e4066f08beec538e775443c5be79dd423fcabahrenszap_create(objset_t *os, dmu_object_type_t ot,
fa9e4066f08beec538e775443c5be79dd423fcabahrens dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx)
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw{
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw return (zap_create_norm(os, 0, ot, bonustype, bonuslen, tx));
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw}
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amwuint64_t
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amwzap_create_norm(objset_t *os, int normflags, dmu_object_type_t ot,
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx)
fa9e4066f08beec538e775443c5be79dd423fcabahrens{
fa9e4066f08beec538e775443c5be79dd423fcabahrens uint64_t obj = dmu_object_alloc(os, ot, 0, bonustype, bonuslen, tx);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw mzap_create_impl(os, obj, normflags, tx);
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (obj);
fa9e4066f08beec538e775443c5be79dd423fcabahrens}
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrensint
fa9e4066f08beec538e775443c5be79dd423fcabahrenszap_destroy(objset_t *os, uint64_t zapobj, dmu_tx_t *tx)
fa9e4066f08beec538e775443c5be79dd423fcabahrens{
fa9e4066f08beec538e775443c5be79dd423fcabahrens /*
fa9e4066f08beec538e775443c5be79dd423fcabahrens * dmu_object_free will free the object number and free the
fa9e4066f08beec538e775443c5be79dd423fcabahrens * data. Freeing the data will cause our pageout function to be
fa9e4066f08beec538e775443c5be79dd423fcabahrens * called, which will destroy our data (zap_leaf_t's and zap_t).
fa9e4066f08beec538e775443c5be79dd423fcabahrens */
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (dmu_object_free(os, zapobj, tx));
fa9e4066f08beec538e775443c5be79dd423fcabahrens}
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens_NOTE(ARGSUSED(0))
fa9e4066f08beec538e775443c5be79dd423fcabahrensvoid
455d5089097abbf7ee4538a03c4df823497b6e68ahrenszap_evict(dmu_buf_t *db, void *vzap)
fa9e4066f08beec538e775443c5be79dd423fcabahrens{
455d5089097abbf7ee4538a03c4df823497b6e68ahrens zap_t *zap = vzap;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens rw_destroy(&zap->zap_rwlock);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
f65e61c04bc28ffd6bda04619c84330b420450b5ahrens if (zap->zap_ismicro)
fa9e4066f08beec538e775443c5be79dd423fcabahrens mze_destroy(zap);
c25056de36a33f2a76f79dcf64593f731d258013gw else
c25056de36a33f2a76f79dcf64593f731d258013gw mutex_destroy(&zap->zap_f.zap_num_entries_mtx);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens kmem_free(zap, sizeof (zap_t));
fa9e4066f08beec538e775443c5be79dd423fcabahrens}
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrensint
fa9e4066f08beec538e775443c5be79dd423fcabahrenszap_count(objset_t *os, uint64_t zapobj, uint64_t *count)
fa9e4066f08beec538e775443c5be79dd423fcabahrens{
fa9e4066f08beec538e775443c5be79dd423fcabahrens zap_t *zap;
fa9e4066f08beec538e775443c5be79dd423fcabahrens int err;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
c5f9e43110e1fb316fc4297c2d150b3518b80bbeahrens err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, &zap);
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (err)
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (err);
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (!zap->zap_ismicro) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens err = fzap_count(zap, count);
fa9e4066f08beec538e775443c5be79dd423fcabahrens } else {
fa9e4066f08beec538e775443c5be79dd423fcabahrens *count = zap->zap_m.zap_num_entries;
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens zap_unlockdir(zap);
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (err);
fa9e4066f08beec538e775443c5be79dd423fcabahrens}
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens/*
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw * zn may be NULL; if not specified, it will be computed if needed.
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw * See also the comment above zap_entry_normalization_conflict().
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw */
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amwstatic boolean_t
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amwmzap_normalization_conflict(zap_t *zap, zap_name_t *zn, mzap_ent_t *mze)
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw{
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw mzap_ent_t *other;
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw int direction = AVL_BEFORE;
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw boolean_t allocdzn = B_FALSE;
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw if (zap->zap_normflags == 0)
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw return (B_FALSE);
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amwagain:
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw for (other = avl_walk(&zap->zap_m.zap_avl, mze, direction);
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw other && other->mze_hash == mze->mze_hash;
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw other = avl_walk(&zap->zap_m.zap_avl, other, direction)) {
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw if (zn == NULL) {
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw zn = zap_name_alloc(zap, mze->mze_phys.mze_name,
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw MT_FIRST);
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw allocdzn = B_TRUE;
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw }
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw if (zap_match(zn, other->mze_phys.mze_name)) {
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw if (allocdzn)
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw zap_name_free(zn);
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw return (B_TRUE);
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw }
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw }
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw if (direction == AVL_BEFORE) {
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw direction = AVL_AFTER;
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw goto again;
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw }
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw if (allocdzn)
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw zap_name_free(zn);
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw return (B_FALSE);
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw}
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw/*
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw * Routines for manipulating attributes.
fa9e4066f08beec538e775443c5be79dd423fcabahrens */
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrensint
fa9e4066f08beec538e775443c5be79dd423fcabahrenszap_lookup(objset_t *os, uint64_t zapobj, const char *name,
fa9e4066f08beec538e775443c5be79dd423fcabahrens uint64_t integer_size, uint64_t num_integers, void *buf)
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw{
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw return (zap_lookup_norm(os, zapobj, name, integer_size,
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw num_integers, buf, MT_EXACT, NULL, 0, NULL));
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw}
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amwint
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amwzap_lookup_norm(objset_t *os, uint64_t zapobj, const char *name,
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw uint64_t integer_size, uint64_t num_integers, void *buf,
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw matchtype_t mt, char *realname, int rn_len,
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw boolean_t *ncp)
fa9e4066f08beec538e775443c5be79dd423fcabahrens{
fa9e4066f08beec538e775443c5be79dd423fcabahrens zap_t *zap;
fa9e4066f08beec538e775443c5be79dd423fcabahrens int err;
fa9e4066f08beec538e775443c5be79dd423fcabahrens mzap_ent_t *mze;
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw zap_name_t *zn;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
c5f9e43110e1fb316fc4297c2d150b3518b80bbeahrens err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, &zap);
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (err)
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (err);
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw zn = zap_name_alloc(zap, name, mt);
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw if (zn == NULL) {
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw zap_unlockdir(zap);
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw return (ENOTSUP);
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw }
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (!zap->zap_ismicro) {
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw err = fzap_lookup(zn, integer_size, num_integers, buf,
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw realname, rn_len, ncp);
fa9e4066f08beec538e775443c5be79dd423fcabahrens } else {
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw mze = mze_find(zn);
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (mze == NULL) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens err = ENOENT;
fa9e4066f08beec538e775443c5be79dd423fcabahrens } else {
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw if (num_integers < 1) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens err = EOVERFLOW;
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw } else if (integer_size != 8) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens err = EINVAL;
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw } else {
fa9e4066f08beec538e775443c5be79dd423fcabahrens *(uint64_t *)buf = mze->mze_phys.mze_value;
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw (void) strlcpy(realname,
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw mze->mze_phys.mze_name, rn_len);
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw if (ncp) {
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw *ncp = mzap_normalization_conflict(zap,
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw zn, mze);
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw }
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw }
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw zap_name_free(zn);
fa9e4066f08beec538e775443c5be79dd423fcabahrens zap_unlockdir(zap);
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (err);
fa9e4066f08beec538e775443c5be79dd423fcabahrens}
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrensint
fa9e4066f08beec538e775443c5be79dd423fcabahrenszap_length(objset_t *os, uint64_t zapobj, const char *name,
fa9e4066f08beec538e775443c5be79dd423fcabahrens uint64_t *integer_size, uint64_t *num_integers)
fa9e4066f08beec538e775443c5be79dd423fcabahrens{
fa9e4066f08beec538e775443c5be79dd423fcabahrens zap_t *zap;
fa9e4066f08beec538e775443c5be79dd423fcabahrens int err;
fa9e4066f08beec538e775443c5be79dd423fcabahrens mzap_ent_t *mze;
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw zap_name_t *zn;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
c5f9e43110e1fb316fc4297c2d150b3518b80bbeahrens err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, &zap);
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (err)
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (err);
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw zn = zap_name_alloc(zap, name, MT_EXACT);
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw if (zn == NULL) {
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw zap_unlockdir(zap);
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw return (ENOTSUP);
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw }
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (!zap->zap_ismicro) {
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw err = fzap_length(zn, integer_size, num_integers);
fa9e4066f08beec538e775443c5be79dd423fcabahrens } else {
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw mze = mze_find(zn);
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (mze == NULL) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens err = ENOENT;
fa9e4066f08beec538e775443c5be79dd423fcabahrens } else {
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (integer_size)
fa9e4066f08beec538e775443c5be79dd423fcabahrens *integer_size = 8;
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (num_integers)
fa9e4066f08beec538e775443c5be79dd423fcabahrens *num_integers = 1;
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw zap_name_free(zn);
fa9e4066f08beec538e775443c5be79dd423fcabahrens zap_unlockdir(zap);
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (err);
fa9e4066f08beec538e775443c5be79dd423fcabahrens}
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrensstatic void
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amwmzap_addent(zap_name_t *zn, uint64_t value)
fa9e4066f08beec538e775443c5be79dd423fcabahrens{
fa9e4066f08beec538e775443c5be79dd423fcabahrens int i;
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw zap_t *zap = zn->zn_zap;
fa9e4066f08beec538e775443c5be79dd423fcabahrens int start = zap->zap_m.zap_alloc_next;
fa9e4066f08beec538e775443c5be79dd423fcabahrens uint32_t cd;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw dprintf("obj=%llu %s=%llu\n", zap->zap_object,
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw zn->zn_name_orij, value);
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT(RW_WRITE_HELD(&zap->zap_rwlock));
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens#ifdef ZFS_DEBUG
fa9e4066f08beec538e775443c5be79dd423fcabahrens for (i = 0; i < zap->zap_m.zap_num_chunks; i++) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens mzap_ent_phys_t *mze = &zap->zap_m.zap_phys->mz_chunk[i];
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw ASSERT(strcmp(zn->zn_name_orij, mze->mze_name) != 0);
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens#endif
fa9e4066f08beec538e775443c5be79dd423fcabahrens
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw cd = mze_find_unused_cd(zap, zn->zn_hash);
fa9e4066f08beec538e775443c5be79dd423fcabahrens /* given the limited size of the microzap, this can't happen */
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT(cd != ZAP_MAXCD);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrensagain:
fa9e4066f08beec538e775443c5be79dd423fcabahrens for (i = start; i < zap->zap_m.zap_num_chunks; i++) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens mzap_ent_phys_t *mze = &zap->zap_m.zap_phys->mz_chunk[i];
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (mze->mze_name[0] == 0) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens mze->mze_value = value;
fa9e4066f08beec538e775443c5be79dd423fcabahrens mze->mze_cd = cd;
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw (void) strcpy(mze->mze_name, zn->zn_name_orij);
fa9e4066f08beec538e775443c5be79dd423fcabahrens zap->zap_m.zap_num_entries++;
fa9e4066f08beec538e775443c5be79dd423fcabahrens zap->zap_m.zap_alloc_next = i+1;
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (zap->zap_m.zap_alloc_next ==
fa9e4066f08beec538e775443c5be79dd423fcabahrens zap->zap_m.zap_num_chunks)
fa9e4066f08beec538e775443c5be79dd423fcabahrens zap->zap_m.zap_alloc_next = 0;
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw mze_insert(zap, i, zn->zn_hash, mze);
fa9e4066f08beec538e775443c5be79dd423fcabahrens return;
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (start != 0) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens start = 0;
fa9e4066f08beec538e775443c5be79dd423fcabahrens goto again;
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT(!"out of entries!");
fa9e4066f08beec538e775443c5be79dd423fcabahrens}
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrensint
fa9e4066f08beec538e775443c5be79dd423fcabahrenszap_add(objset_t *os, uint64_t zapobj, const char *name,
fa9e4066f08beec538e775443c5be79dd423fcabahrens int integer_size, uint64_t num_integers,
fa9e4066f08beec538e775443c5be79dd423fcabahrens const void *val, dmu_tx_t *tx)
fa9e4066f08beec538e775443c5be79dd423fcabahrens{
fa9e4066f08beec538e775443c5be79dd423fcabahrens zap_t *zap;
fa9e4066f08beec538e775443c5be79dd423fcabahrens int err;
fa9e4066f08beec538e775443c5be79dd423fcabahrens mzap_ent_t *mze;
fa9e4066f08beec538e775443c5be79dd423fcabahrens const uint64_t *intval = val;
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw zap_name_t *zn;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
c5f9e43110e1fb316fc4297c2d150b3518b80bbeahrens err = zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, TRUE, &zap);
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (err)
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (err);
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw zn = zap_name_alloc(zap, name, MT_EXACT);
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw if (zn == NULL) {
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw zap_unlockdir(zap);
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw return (ENOTSUP);
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw }
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (!zap->zap_ismicro) {
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw err = fzap_add(zn, integer_size, num_integers, val, tx);
ad860c82b2a8ffe69f42630da73ded0c92a7a36ebonwick zap = zn->zn_zap; /* fzap_add() may change zap */
fa9e4066f08beec538e775443c5be79dd423fcabahrens } else if (integer_size != 8 || num_integers != 1 ||
fa9e4066f08beec538e775443c5be79dd423fcabahrens strlen(name) >= MZAP_NAME_LEN) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens dprintf("upgrading obj %llu: intsz=%u numint=%llu name=%s\n",
fa9e4066f08beec538e775443c5be79dd423fcabahrens zapobj, integer_size, num_integers, name);
ad860c82b2a8ffe69f42630da73ded0c92a7a36ebonwick err = mzap_upgrade(&zn->zn_zap, tx);
ad860c82b2a8ffe69f42630da73ded0c92a7a36ebonwick if (err == 0)
ad860c82b2a8ffe69f42630da73ded0c92a7a36ebonwick err = fzap_add(zn, integer_size, num_integers, val, tx);
ad860c82b2a8ffe69f42630da73ded0c92a7a36ebonwick zap = zn->zn_zap; /* fzap_add() may change zap */
fa9e4066f08beec538e775443c5be79dd423fcabahrens } else {
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw mze = mze_find(zn);
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (mze != NULL) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens err = EEXIST;
fa9e4066f08beec538e775443c5be79dd423fcabahrens } else {
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw mzap_addent(zn, *intval);
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
ad860c82b2a8ffe69f42630da73ded0c92a7a36ebonwick ASSERT(zap == zn->zn_zap);
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw zap_name_free(zn);
ad860c82b2a8ffe69f42630da73ded0c92a7a36ebonwick if (zap != NULL) /* may be NULL if fzap_add() failed */
ad860c82b2a8ffe69f42630da73ded0c92a7a36ebonwick zap_unlockdir(zap);
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (err);
fa9e4066f08beec538e775443c5be79dd423fcabahrens}
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrensint
fa9e4066f08beec538e775443c5be79dd423fcabahrenszap_update(objset_t *os, uint64_t zapobj, const char *name,
fa9e4066f08beec538e775443c5be79dd423fcabahrens int integer_size, uint64_t num_integers, const void *val, dmu_tx_t *tx)
fa9e4066f08beec538e775443c5be79dd423fcabahrens{
fa9e4066f08beec538e775443c5be79dd423fcabahrens zap_t *zap;
fa9e4066f08beec538e775443c5be79dd423fcabahrens mzap_ent_t *mze;
fa9e4066f08beec538e775443c5be79dd423fcabahrens const uint64_t *intval = val;
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw zap_name_t *zn;
fa9e4066f08beec538e775443c5be79dd423fcabahrens int err;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
c5f9e43110e1fb316fc4297c2d150b3518b80bbeahrens err = zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, TRUE, &zap);
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (err)
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (err);
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw zn = zap_name_alloc(zap, name, MT_EXACT);
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw if (zn == NULL) {
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw zap_unlockdir(zap);
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw return (ENOTSUP);
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw }
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (!zap->zap_ismicro) {
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw err = fzap_update(zn, integer_size, num_integers, val, tx);
ad860c82b2a8ffe69f42630da73ded0c92a7a36ebonwick zap = zn->zn_zap; /* fzap_update() may change zap */
fa9e4066f08beec538e775443c5be79dd423fcabahrens } else if (integer_size != 8 || num_integers != 1 ||
fa9e4066f08beec538e775443c5be79dd423fcabahrens strlen(name) >= MZAP_NAME_LEN) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens dprintf("upgrading obj %llu: intsz=%u numint=%llu name=%s\n",
fa9e4066f08beec538e775443c5be79dd423fcabahrens zapobj, integer_size, num_integers, name);
ad860c82b2a8ffe69f42630da73ded0c92a7a36ebonwick err = mzap_upgrade(&zn->zn_zap, tx);
ad860c82b2a8ffe69f42630da73ded0c92a7a36ebonwick if (err == 0)
ad860c82b2a8ffe69f42630da73ded0c92a7a36ebonwick err = fzap_update(zn, integer_size, num_integers,
ad860c82b2a8ffe69f42630da73ded0c92a7a36ebonwick val, tx);
ad860c82b2a8ffe69f42630da73ded0c92a7a36ebonwick zap = zn->zn_zap; /* fzap_update() may change zap */
fa9e4066f08beec538e775443c5be79dd423fcabahrens } else {
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw mze = mze_find(zn);
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (mze != NULL) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens mze->mze_phys.mze_value = *intval;
fa9e4066f08beec538e775443c5be79dd423fcabahrens zap->zap_m.zap_phys->mz_chunk
fa9e4066f08beec538e775443c5be79dd423fcabahrens [mze->mze_chunkid].mze_value = *intval;
fa9e4066f08beec538e775443c5be79dd423fcabahrens } else {
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw mzap_addent(zn, *intval);
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
ad860c82b2a8ffe69f42630da73ded0c92a7a36ebonwick ASSERT(zap == zn->zn_zap);
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw zap_name_free(zn);
ad860c82b2a8ffe69f42630da73ded0c92a7a36ebonwick if (zap != NULL) /* may be NULL if fzap_upgrade() failed */
ad860c82b2a8ffe69f42630da73ded0c92a7a36ebonwick zap_unlockdir(zap);
455d5089097abbf7ee4538a03c4df823497b6e68ahrens return (err);
fa9e4066f08beec538e775443c5be79dd423fcabahrens}
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrensint
fa9e4066f08beec538e775443c5be79dd423fcabahrenszap_remove(objset_t *os, uint64_t zapobj, const char *name, dmu_tx_t *tx)
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw{
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw return (zap_remove_norm(os, zapobj, name, MT_EXACT, tx));
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw}
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amwint
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amwzap_remove_norm(objset_t *os, uint64_t zapobj, const char *name,
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw matchtype_t mt, dmu_tx_t *tx)
fa9e4066f08beec538e775443c5be79dd423fcabahrens{
fa9e4066f08beec538e775443c5be79dd423fcabahrens zap_t *zap;
fa9e4066f08beec538e775443c5be79dd423fcabahrens int err;
fa9e4066f08beec538e775443c5be79dd423fcabahrens mzap_ent_t *mze;
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw zap_name_t *zn;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
c5f9e43110e1fb316fc4297c2d150b3518b80bbeahrens err = zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, FALSE, &zap);
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (err)
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (err);
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw zn = zap_name_alloc(zap, name, mt);
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw if (zn == NULL) {
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw zap_unlockdir(zap);
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw return (ENOTSUP);
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw }
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (!zap->zap_ismicro) {
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw err = fzap_remove(zn, tx);
fa9e4066f08beec538e775443c5be79dd423fcabahrens } else {
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw mze = mze_find(zn);
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (mze == NULL) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens err = ENOENT;
fa9e4066f08beec538e775443c5be79dd423fcabahrens } else {
fa9e4066f08beec538e775443c5be79dd423fcabahrens zap->zap_m.zap_num_entries--;
fa9e4066f08beec538e775443c5be79dd423fcabahrens bzero(&zap->zap_m.zap_phys->mz_chunk[mze->mze_chunkid],
fa9e4066f08beec538e775443c5be79dd423fcabahrens sizeof (mzap_ent_phys_t));
fa9e4066f08beec538e775443c5be79dd423fcabahrens mze_remove(zap, mze);
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw zap_name_free(zn);
fa9e4066f08beec538e775443c5be79dd423fcabahrens zap_unlockdir(zap);
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (err);
fa9e4066f08beec538e775443c5be79dd423fcabahrens}
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens/*
fa9e4066f08beec538e775443c5be79dd423fcabahrens * Routines for iterating over the attributes.
fa9e4066f08beec538e775443c5be79dd423fcabahrens */
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens/*
fa9e4066f08beec538e775443c5be79dd423fcabahrens * We want to keep the high 32 bits of the cursor zero if we can, so
fa9e4066f08beec538e775443c5be79dd423fcabahrens * that 32-bit programs can access this. So use a small hash value so
fa9e4066f08beec538e775443c5be79dd423fcabahrens * we can fit 4 bits of cd into the 32-bit cursor.
fa9e4066f08beec538e775443c5be79dd423fcabahrens *
fa9e4066f08beec538e775443c5be79dd423fcabahrens * [ 4 zero bits | 32-bit collision differentiator | 28-bit hash value ]
fa9e4066f08beec538e775443c5be79dd423fcabahrens */
fa9e4066f08beec538e775443c5be79dd423fcabahrensvoid
fa9e4066f08beec538e775443c5be79dd423fcabahrenszap_cursor_init_serialized(zap_cursor_t *zc, objset_t *os, uint64_t zapobj,
fa9e4066f08beec538e775443c5be79dd423fcabahrens uint64_t serialized)
fa9e4066f08beec538e775443c5be79dd423fcabahrens{
fa9e4066f08beec538e775443c5be79dd423fcabahrens zc->zc_objset = os;
87e5029a3226958edab1512d6182bc74d8d80c9aahrens zc->zc_zap = NULL;
87e5029a3226958edab1512d6182bc74d8d80c9aahrens zc->zc_leaf = NULL;
fa9e4066f08beec538e775443c5be79dd423fcabahrens zc->zc_zapobj = zapobj;
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (serialized == -1ULL) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens zc->zc_hash = -1ULL;
fa9e4066f08beec538e775443c5be79dd423fcabahrens zc->zc_cd = 0;
fa9e4066f08beec538e775443c5be79dd423fcabahrens } else {
fa9e4066f08beec538e775443c5be79dd423fcabahrens zc->zc_hash = serialized << (64-ZAP_HASHBITS);
fa9e4066f08beec538e775443c5be79dd423fcabahrens zc->zc_cd = serialized >> ZAP_HASHBITS;
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (zc->zc_cd >= ZAP_MAXCD) /* corrupt serialized */
fa9e4066f08beec538e775443c5be79dd423fcabahrens zc->zc_cd = 0;
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens}
fa9e4066f08beec538e775443c5be79dd423fcabahrens
87e5029a3226958edab1512d6182bc74d8d80c9aahrensvoid
87e5029a3226958edab1512d6182bc74d8d80c9aahrenszap_cursor_init(zap_cursor_t *zc, objset_t *os, uint64_t zapobj)
87e5029a3226958edab1512d6182bc74d8d80c9aahrens{
87e5029a3226958edab1512d6182bc74d8d80c9aahrens zap_cursor_init_serialized(zc, os, zapobj, 0);
87e5029a3226958edab1512d6182bc74d8d80c9aahrens}
87e5029a3226958edab1512d6182bc74d8d80c9aahrens
87e5029a3226958edab1512d6182bc74d8d80c9aahrensvoid
87e5029a3226958edab1512d6182bc74d8d80c9aahrenszap_cursor_fini(zap_cursor_t *zc)
87e5029a3226958edab1512d6182bc74d8d80c9aahrens{
87e5029a3226958edab1512d6182bc74d8d80c9aahrens if (zc->zc_zap) {
87e5029a3226958edab1512d6182bc74d8d80c9aahrens rw_enter(&zc->zc_zap->zap_rwlock, RW_READER);
87e5029a3226958edab1512d6182bc74d8d80c9aahrens zap_unlockdir(zc->zc_zap);
87e5029a3226958edab1512d6182bc74d8d80c9aahrens zc->zc_zap = NULL;
87e5029a3226958edab1512d6182bc74d8d80c9aahrens }
87e5029a3226958edab1512d6182bc74d8d80c9aahrens if (zc->zc_leaf) {
87e5029a3226958edab1512d6182bc74d8d80c9aahrens rw_enter(&zc->zc_leaf->l_rwlock, RW_READER);
87e5029a3226958edab1512d6182bc74d8d80c9aahrens zap_put_leaf(zc->zc_leaf);
87e5029a3226958edab1512d6182bc74d8d80c9aahrens zc->zc_leaf = NULL;
87e5029a3226958edab1512d6182bc74d8d80c9aahrens }
87e5029a3226958edab1512d6182bc74d8d80c9aahrens zc->zc_objset = NULL;
87e5029a3226958edab1512d6182bc74d8d80c9aahrens}
87e5029a3226958edab1512d6182bc74d8d80c9aahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrensuint64_t
fa9e4066f08beec538e775443c5be79dd423fcabahrenszap_cursor_serialize(zap_cursor_t *zc)
fa9e4066f08beec538e775443c5be79dd423fcabahrens{
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (zc->zc_hash == -1ULL)
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (-1ULL);
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT((zc->zc_hash & (ZAP_MAXCD-1)) == 0);
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT(zc->zc_cd < ZAP_MAXCD);
fa9e4066f08beec538e775443c5be79dd423fcabahrens return ((zc->zc_hash >> (64-ZAP_HASHBITS)) |
fa9e4066f08beec538e775443c5be79dd423fcabahrens ((uint64_t)zc->zc_cd << ZAP_HASHBITS));
fa9e4066f08beec538e775443c5be79dd423fcabahrens}
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrensint
fa9e4066f08beec538e775443c5be79dd423fcabahrenszap_cursor_retrieve(zap_cursor_t *zc, zap_attribute_t *za)
fa9e4066f08beec538e775443c5be79dd423fcabahrens{
fa9e4066f08beec538e775443c5be79dd423fcabahrens int err;
fa9e4066f08beec538e775443c5be79dd423fcabahrens avl_index_t idx;
fa9e4066f08beec538e775443c5be79dd423fcabahrens mzap_ent_t mze_tofind;
fa9e4066f08beec538e775443c5be79dd423fcabahrens mzap_ent_t *mze;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (zc->zc_hash == -1ULL)
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (ENOENT);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
87e5029a3226958edab1512d6182bc74d8d80c9aahrens if (zc->zc_zap == NULL) {
87e5029a3226958edab1512d6182bc74d8d80c9aahrens err = zap_lockdir(zc->zc_objset, zc->zc_zapobj, NULL,
c5f9e43110e1fb316fc4297c2d150b3518b80bbeahrens RW_READER, TRUE, FALSE, &zc->zc_zap);
87e5029a3226958edab1512d6182bc74d8d80c9aahrens if (err)
87e5029a3226958edab1512d6182bc74d8d80c9aahrens return (err);
87e5029a3226958edab1512d6182bc74d8d80c9aahrens } else {
87e5029a3226958edab1512d6182bc74d8d80c9aahrens rw_enter(&zc->zc_zap->zap_rwlock, RW_READER);
87e5029a3226958edab1512d6182bc74d8d80c9aahrens }
87e5029a3226958edab1512d6182bc74d8d80c9aahrens if (!zc->zc_zap->zap_ismicro) {
87e5029a3226958edab1512d6182bc74d8d80c9aahrens err = fzap_cursor_retrieve(zc->zc_zap, zc, za);
fa9e4066f08beec538e775443c5be79dd423fcabahrens } else {
fa9e4066f08beec538e775443c5be79dd423fcabahrens err = ENOENT;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens mze_tofind.mze_hash = zc->zc_hash;
fa9e4066f08beec538e775443c5be79dd423fcabahrens mze_tofind.mze_phys.mze_cd = zc->zc_cd;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
87e5029a3226958edab1512d6182bc74d8d80c9aahrens mze = avl_find(&zc->zc_zap->zap_m.zap_avl, &mze_tofind, &idx);
87e5029a3226958edab1512d6182bc74d8d80c9aahrens if (mze == NULL) {
87e5029a3226958edab1512d6182bc74d8d80c9aahrens mze = avl_nearest(&zc->zc_zap->zap_m.zap_avl,
87e5029a3226958edab1512d6182bc74d8d80c9aahrens idx, AVL_AFTER);
87e5029a3226958edab1512d6182bc74d8d80c9aahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (mze) {
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw ASSERT(0 == bcmp(&mze->mze_phys,
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw &zc->zc_zap->zap_m.zap_phys->mz_chunk
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw [mze->mze_chunkid], sizeof (mze->mze_phys)));
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw za->za_normalization_conflict =
da6c28aaf62fa55f0fdb8004aa40f88f23bf53f0amw mzap_normalization_conflict(zc->zc_zap, NULL, mze);
fa9e4066f08beec538e775443c5be79dd423fcabahrens za->za_integer_length = 8;
fa9e4066f08beec538e775443c5be79dd423fcabahrens za->za_num_integers = 1;
fa9e4066f08beec538e775443c5be79dd423fcabahrens za->za_first_integer = mze->mze_phys.mze_value;
fa9e4066f08beec538e775443c5be79dd423fcabahrens (void) strcpy(za->za_name, mze->mze_phys.mze_name);
fa9e4066f08beec538e775443c5be79dd423fcabahrens zc->zc_hash = mze->mze_hash;
fa9e4066f08beec538e775443c5be79dd423fcabahrens zc->zc_cd = mze->mze_phys.mze_cd;
fa9e4066f08beec538e775443c5be79dd423fcabahrens err = 0;
fa9e4066f08beec538e775443c5be79dd423fcabahrens } else {
fa9e4066f08beec538e775443c5be79dd423fcabahrens zc->zc_hash = -1ULL;
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
87e5029a3226958edab1512d6182bc74d8d80c9aahrens rw_exit(&zc->zc_zap->zap_rwlock);
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (err);
fa9e4066f08beec538e775443c5be79dd423fcabahrens}
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrensvoid
fa9e4066f08beec538e775443c5be79dd423fcabahrenszap_cursor_advance(zap_cursor_t *zc)
fa9e4066f08beec538e775443c5be79dd423fcabahrens{
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (zc->zc_hash == -1ULL)
fa9e4066f08beec538e775443c5be79dd423fcabahrens return;
fa9e4066f08beec538e775443c5be79dd423fcabahrens zc->zc_cd++;
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (zc->zc_cd >= ZAP_MAXCD) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens zc->zc_cd = 0;
fa9e4066f08beec538e775443c5be79dd423fcabahrens zc->zc_hash += 1ULL<<(64-ZAP_HASHBITS);
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (zc->zc_hash == 0) /* EOF */
fa9e4066f08beec538e775443c5be79dd423fcabahrens zc->zc_hash = -1ULL;
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens}
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrensint
fa9e4066f08beec538e775443c5be79dd423fcabahrenszap_get_stats(objset_t *os, uint64_t zapobj, zap_stats_t *zs)
fa9e4066f08beec538e775443c5be79dd423fcabahrens{
fa9e4066f08beec538e775443c5be79dd423fcabahrens int err;
fa9e4066f08beec538e775443c5be79dd423fcabahrens zap_t *zap;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
c5f9e43110e1fb316fc4297c2d150b3518b80bbeahrens err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, &zap);
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (err)
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (err);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens bzero(zs, sizeof (zap_stats_t));
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (zap->zap_ismicro) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens zs->zs_blocksize = zap->zap_dbuf->db_size;
fa9e4066f08beec538e775443c5be79dd423fcabahrens zs->zs_num_entries = zap->zap_m.zap_num_entries;
fa9e4066f08beec538e775443c5be79dd423fcabahrens zs->zs_num_blocks = 1;
fa9e4066f08beec538e775443c5be79dd423fcabahrens } else {
fa9e4066f08beec538e775443c5be79dd423fcabahrens fzap_get_stats(zap, zs);
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens zap_unlockdir(zap);
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (0);
fa9e4066f08beec538e775443c5be79dd423fcabahrens}