1*fa9e4066Sahrens /* 2*fa9e4066Sahrens * CDDL HEADER START 3*fa9e4066Sahrens * 4*fa9e4066Sahrens * The contents of this file are subject to the terms of the 5*fa9e4066Sahrens * Common Development and Distribution License, Version 1.0 only 6*fa9e4066Sahrens * (the "License"). You may not use this file except in compliance 7*fa9e4066Sahrens * with the License. 8*fa9e4066Sahrens * 9*fa9e4066Sahrens * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10*fa9e4066Sahrens * or http://www.opensolaris.org/os/licensing. 11*fa9e4066Sahrens * See the License for the specific language governing permissions 12*fa9e4066Sahrens * and limitations under the License. 13*fa9e4066Sahrens * 14*fa9e4066Sahrens * When distributing Covered Code, include this CDDL HEADER in each 15*fa9e4066Sahrens * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16*fa9e4066Sahrens * If applicable, add the following below this CDDL HEADER, with the 17*fa9e4066Sahrens * fields enclosed by brackets "[]" replaced with your own identifying 18*fa9e4066Sahrens * information: Portions Copyright [yyyy] [name of copyright owner] 19*fa9e4066Sahrens * 20*fa9e4066Sahrens * CDDL HEADER END 21*fa9e4066Sahrens */ 22*fa9e4066Sahrens /* 23*fa9e4066Sahrens * Copyright 2005 Sun Microsystems, Inc. All rights reserved. 24*fa9e4066Sahrens * Use is subject to license terms. 25*fa9e4066Sahrens */ 26*fa9e4066Sahrens 27*fa9e4066Sahrens #ifndef _SYS_ZAP_IMPL_H 28*fa9e4066Sahrens #define _SYS_ZAP_IMPL_H 29*fa9e4066Sahrens 30*fa9e4066Sahrens #pragma ident "%Z%%M% %I% %E% SMI" 31*fa9e4066Sahrens 32*fa9e4066Sahrens #include <sys/zap.h> 33*fa9e4066Sahrens #include <sys/zfs_context.h> 34*fa9e4066Sahrens #include <sys/avl.h> 35*fa9e4066Sahrens 36*fa9e4066Sahrens #ifdef __cplusplus 37*fa9e4066Sahrens extern "C" { 38*fa9e4066Sahrens #endif 39*fa9e4066Sahrens 40*fa9e4066Sahrens #define ZAP_MAGIC 0x2F52AB2AB 41*fa9e4066Sahrens 42*fa9e4066Sahrens #define ZAP_BLOCK_SHIFT 17 43*fa9e4066Sahrens 44*fa9e4066Sahrens #define ZAP_MAXCD (uint32_t)(-1) 45*fa9e4066Sahrens #define ZAP_HASHBITS 28 46*fa9e4066Sahrens #define MZAP_ENT_LEN 64 47*fa9e4066Sahrens #define MZAP_NAME_LEN (MZAP_ENT_LEN - 8 - 4 - 2) 48*fa9e4066Sahrens #define MZAP_MAX_BLKSHIFT ZAP_BLOCK_SHIFT 49*fa9e4066Sahrens #define MZAP_MAX_BLKSZ (1 << MZAP_MAX_BLKSHIFT) 50*fa9e4066Sahrens 51*fa9e4066Sahrens typedef struct mzap_ent_phys { 52*fa9e4066Sahrens uint64_t mze_value; 53*fa9e4066Sahrens uint32_t mze_cd; 54*fa9e4066Sahrens uint16_t mze_pad; /* in case we want to chain them someday */ 55*fa9e4066Sahrens char mze_name[MZAP_NAME_LEN]; 56*fa9e4066Sahrens } mzap_ent_phys_t; 57*fa9e4066Sahrens 58*fa9e4066Sahrens typedef struct mzap_phys { 59*fa9e4066Sahrens uint64_t mz_block_type; /* ZBT_MICRO */ 60*fa9e4066Sahrens uint64_t mz_salt; 61*fa9e4066Sahrens uint64_t mz_pad[6]; 62*fa9e4066Sahrens mzap_ent_phys_t mz_chunk[1]; 63*fa9e4066Sahrens /* actually variable size depending on block size */ 64*fa9e4066Sahrens } mzap_phys_t; 65*fa9e4066Sahrens 66*fa9e4066Sahrens typedef struct mzap_ent { 67*fa9e4066Sahrens avl_node_t mze_node; 68*fa9e4066Sahrens int mze_chunkid; 69*fa9e4066Sahrens uint64_t mze_hash; 70*fa9e4066Sahrens mzap_ent_phys_t mze_phys; 71*fa9e4066Sahrens } mzap_ent_t; 72*fa9e4066Sahrens 73*fa9e4066Sahrens 74*fa9e4066Sahrens /* 75*fa9e4066Sahrens * The (fat) zap is stored in one object. It is an array of 76*fa9e4066Sahrens * 1<<ZAP_BLOCK_SHIFT byte blocks. The layout looks like one of: 77*fa9e4066Sahrens * 78*fa9e4066Sahrens * ptrtbl fits in first block: 79*fa9e4066Sahrens * [zap_phys_t zap_ptrtbl_shift < 6] [zap_leaf_t] ... 80*fa9e4066Sahrens * 81*fa9e4066Sahrens * ptrtbl too big for first block: 82*fa9e4066Sahrens * [zap_phys_t zap_ptrtbl_shift >= 6] [zap_leaf_t] [ptrtbl] ... 83*fa9e4066Sahrens * 84*fa9e4066Sahrens */ 85*fa9e4066Sahrens 86*fa9e4066Sahrens struct dmu_buf; 87*fa9e4066Sahrens struct zap_leaf; 88*fa9e4066Sahrens 89*fa9e4066Sahrens #define ZBT_LEAF ((1ULL << 63) + 0) 90*fa9e4066Sahrens #define ZBT_HEADER ((1ULL << 63) + 1) 91*fa9e4066Sahrens #define ZBT_MICRO ((1ULL << 63) + 3) 92*fa9e4066Sahrens /* any other values are ptrtbl blocks */ 93*fa9e4066Sahrens 94*fa9e4066Sahrens /* 1/2 the block size */ 95*fa9e4066Sahrens #define ZAP_PTRTBL_MIN_SHIFT (ZAP_BLOCK_SHIFT - 3 - 1) 96*fa9e4066Sahrens 97*fa9e4066Sahrens /* 98*fa9e4066Sahrens * TAKE NOTE: 99*fa9e4066Sahrens * If zap_phys_t is modified, zap_byteswap() must be modified. 100*fa9e4066Sahrens */ 101*fa9e4066Sahrens typedef struct zap_phys { 102*fa9e4066Sahrens uint64_t zap_block_type; /* ZBT_HEADER */ 103*fa9e4066Sahrens uint64_t zap_magic; /* ZAP_MAGIC */ 104*fa9e4066Sahrens 105*fa9e4066Sahrens struct zap_table_phys { 106*fa9e4066Sahrens uint64_t zt_blk; /* starting block number */ 107*fa9e4066Sahrens uint64_t zt_numblks; /* number of blocks */ 108*fa9e4066Sahrens uint64_t zt_shift; /* bits to index it */ 109*fa9e4066Sahrens uint64_t zt_nextblk; /* next (larger) copy start block */ 110*fa9e4066Sahrens uint64_t zt_blks_copied; /* number source blocks copied */ 111*fa9e4066Sahrens } zap_ptrtbl; 112*fa9e4066Sahrens 113*fa9e4066Sahrens uint64_t zap_freeblk; /* the next free block */ 114*fa9e4066Sahrens uint64_t zap_num_leafs; /* number of leafs */ 115*fa9e4066Sahrens uint64_t zap_num_entries; /* number of entries */ 116*fa9e4066Sahrens uint64_t zap_salt; /* salt to stir into hash function */ 117*fa9e4066Sahrens uint64_t zap_pad[8181]; 118*fa9e4066Sahrens uint64_t zap_leafs[1 << ZAP_PTRTBL_MIN_SHIFT]; 119*fa9e4066Sahrens } zap_phys_t; 120*fa9e4066Sahrens 121*fa9e4066Sahrens typedef struct zap_table_phys zap_table_phys_t; 122*fa9e4066Sahrens 123*fa9e4066Sahrens typedef struct zap { 124*fa9e4066Sahrens objset_t *zap_objset; 125*fa9e4066Sahrens uint64_t zap_object; 126*fa9e4066Sahrens struct dmu_buf *zap_dbuf; 127*fa9e4066Sahrens krwlock_t zap_rwlock; 128*fa9e4066Sahrens int zap_ismicro; 129*fa9e4066Sahrens uint64_t zap_salt; 130*fa9e4066Sahrens union { 131*fa9e4066Sahrens struct { 132*fa9e4066Sahrens zap_phys_t *zap_phys; 133*fa9e4066Sahrens 134*fa9e4066Sahrens /* 135*fa9e4066Sahrens * zap_num_entries_mtx protects 136*fa9e4066Sahrens * zap_num_entries 137*fa9e4066Sahrens */ 138*fa9e4066Sahrens kmutex_t zap_num_entries_mtx; 139*fa9e4066Sahrens } zap_fat; 140*fa9e4066Sahrens struct { 141*fa9e4066Sahrens mzap_phys_t *zap_phys; 142*fa9e4066Sahrens int16_t zap_num_entries; 143*fa9e4066Sahrens int16_t zap_num_chunks; 144*fa9e4066Sahrens int16_t zap_alloc_next; 145*fa9e4066Sahrens avl_tree_t zap_avl; 146*fa9e4066Sahrens } zap_micro; 147*fa9e4066Sahrens } zap_u; 148*fa9e4066Sahrens } zap_t; 149*fa9e4066Sahrens 150*fa9e4066Sahrens #define zap_f zap_u.zap_fat 151*fa9e4066Sahrens #define zap_m zap_u.zap_micro 152*fa9e4066Sahrens 153*fa9e4066Sahrens uint64_t zap_hash(zap_t *zap, const char *name); 154*fa9e4066Sahrens int zap_lockdir(objset_t *os, uint64_t obj, dmu_tx_t *tx, 155*fa9e4066Sahrens krw_t lti, int fatreader, zap_t **zapp); 156*fa9e4066Sahrens void zap_unlockdir(zap_t *zap); 157*fa9e4066Sahrens void zap_pageout(dmu_buf_t *db, void *vmzap); 158*fa9e4066Sahrens 159*fa9e4066Sahrens void zap_print(zap_t *); 160*fa9e4066Sahrens struct zap_leaf *zap_create_leaf(zap_t *zd, dmu_tx_t *tx); 161*fa9e4066Sahrens void zap_destroy_leaf(zap_t *zap, struct zap_leaf *l, dmu_tx_t *tx); 162*fa9e4066Sahrens uint64_t zap_allocate_blocks(zap_t *zap, int nblocks, dmu_tx_t *tx); 163*fa9e4066Sahrens 164*fa9e4066Sahrens #define ZAP_HASH_IDX(hash, n) (((n) == 0) ? 0 : ((hash) >> (64 - (n)))) 165*fa9e4066Sahrens 166*fa9e4066Sahrens void fzap_byteswap(void *buf, size_t size); 167*fa9e4066Sahrens int fzap_count(zap_t *zap, uint64_t *count); 168*fa9e4066Sahrens int fzap_lookup(zap_t *zap, const char *name, 169*fa9e4066Sahrens uint64_t integer_size, uint64_t num_integers, void *buf); 170*fa9e4066Sahrens int fzap_add(zap_t *zap, const char *name, 171*fa9e4066Sahrens uint64_t integer_size, uint64_t num_integers, 172*fa9e4066Sahrens const void *val, dmu_tx_t *tx); 173*fa9e4066Sahrens int fzap_update(zap_t *zap, const char *name, 174*fa9e4066Sahrens int integer_size, uint64_t num_integers, const void *val, dmu_tx_t *tx); 175*fa9e4066Sahrens int fzap_length(zap_t *zap, const char *name, 176*fa9e4066Sahrens uint64_t *integer_size, uint64_t *num_integers); 177*fa9e4066Sahrens int fzap_remove(zap_t *zap, const char *name, dmu_tx_t *tx); 178*fa9e4066Sahrens int fzap_cursor_retrieve(zap_t *zap, zap_cursor_t *zc, zap_attribute_t *za); 179*fa9e4066Sahrens void fzap_get_stats(zap_t *zap, zap_stats_t *zs); 180*fa9e4066Sahrens 181*fa9e4066Sahrens int fzap_add_cd(zap_t *zap, const char *name, 182*fa9e4066Sahrens uint64_t integer_size, uint64_t num_integers, 183*fa9e4066Sahrens const void *val, uint32_t cd, dmu_tx_t *tx, struct zap_leaf **lp); 184*fa9e4066Sahrens void fzap_upgrade(zap_t *zap, dmu_tx_t *tx); 185*fa9e4066Sahrens 186*fa9e4066Sahrens #ifdef __cplusplus 187*fa9e4066Sahrens } 188*fa9e4066Sahrens #endif 189*fa9e4066Sahrens 190*fa9e4066Sahrens #endif /* _SYS_ZAP_IMPL_H */ 191