1fa9e4066Sahrens /* 2fa9e4066Sahrens * CDDL HEADER START 3fa9e4066Sahrens * 4fa9e4066Sahrens * The contents of this file are subject to the terms of the 5fa9e4066Sahrens * Common Development and Distribution License, Version 1.0 only 6fa9e4066Sahrens * (the "License"). You may not use this file except in compliance 7fa9e4066Sahrens * with the License. 8fa9e4066Sahrens * 9fa9e4066Sahrens * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10fa9e4066Sahrens * or http://www.opensolaris.org/os/licensing. 11fa9e4066Sahrens * See the License for the specific language governing permissions 12fa9e4066Sahrens * and limitations under the License. 13fa9e4066Sahrens * 14fa9e4066Sahrens * When distributing Covered Code, include this CDDL HEADER in each 15fa9e4066Sahrens * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16fa9e4066Sahrens * If applicable, add the following below this CDDL HEADER, with the 17fa9e4066Sahrens * fields enclosed by brackets "[]" replaced with your own identifying 18fa9e4066Sahrens * information: Portions Copyright [yyyy] [name of copyright owner] 19fa9e4066Sahrens * 20fa9e4066Sahrens * CDDL HEADER END 21fa9e4066Sahrens */ 22fa9e4066Sahrens /* 23fa9e4066Sahrens * Copyright 2005 Sun Microsystems, Inc. All rights reserved. 24fa9e4066Sahrens * Use is subject to license terms. 25fa9e4066Sahrens */ 26fa9e4066Sahrens 27fa9e4066Sahrens #ifndef _SYS_ZAP_IMPL_H 28fa9e4066Sahrens #define _SYS_ZAP_IMPL_H 29fa9e4066Sahrens 30fa9e4066Sahrens #pragma ident "%Z%%M% %I% %E% SMI" 31fa9e4066Sahrens 32fa9e4066Sahrens #include <sys/zap.h> 33fa9e4066Sahrens #include <sys/zfs_context.h> 34fa9e4066Sahrens #include <sys/avl.h> 35fa9e4066Sahrens 36fa9e4066Sahrens #ifdef __cplusplus 37fa9e4066Sahrens extern "C" { 38fa9e4066Sahrens #endif 39fa9e4066Sahrens 40fa9e4066Sahrens #define ZAP_MAGIC 0x2F52AB2AB 41fa9e4066Sahrens 42fa9e4066Sahrens #define ZAP_BLOCK_SHIFT 17 43fa9e4066Sahrens 44fa9e4066Sahrens #define ZAP_MAXCD (uint32_t)(-1) 45fa9e4066Sahrens #define ZAP_HASHBITS 28 46fa9e4066Sahrens #define MZAP_ENT_LEN 64 47fa9e4066Sahrens #define MZAP_NAME_LEN (MZAP_ENT_LEN - 8 - 4 - 2) 48fa9e4066Sahrens #define MZAP_MAX_BLKSHIFT ZAP_BLOCK_SHIFT 49fa9e4066Sahrens #define MZAP_MAX_BLKSZ (1 << MZAP_MAX_BLKSHIFT) 50fa9e4066Sahrens 51fa9e4066Sahrens typedef struct mzap_ent_phys { 52fa9e4066Sahrens uint64_t mze_value; 53fa9e4066Sahrens uint32_t mze_cd; 54fa9e4066Sahrens uint16_t mze_pad; /* in case we want to chain them someday */ 55fa9e4066Sahrens char mze_name[MZAP_NAME_LEN]; 56fa9e4066Sahrens } mzap_ent_phys_t; 57fa9e4066Sahrens 58fa9e4066Sahrens typedef struct mzap_phys { 59fa9e4066Sahrens uint64_t mz_block_type; /* ZBT_MICRO */ 60fa9e4066Sahrens uint64_t mz_salt; 61fa9e4066Sahrens uint64_t mz_pad[6]; 62fa9e4066Sahrens mzap_ent_phys_t mz_chunk[1]; 63fa9e4066Sahrens /* actually variable size depending on block size */ 64fa9e4066Sahrens } mzap_phys_t; 65fa9e4066Sahrens 66fa9e4066Sahrens typedef struct mzap_ent { 67fa9e4066Sahrens avl_node_t mze_node; 68fa9e4066Sahrens int mze_chunkid; 69fa9e4066Sahrens uint64_t mze_hash; 70fa9e4066Sahrens mzap_ent_phys_t mze_phys; 71fa9e4066Sahrens } mzap_ent_t; 72fa9e4066Sahrens 73fa9e4066Sahrens 74fa9e4066Sahrens /* 75fa9e4066Sahrens * The (fat) zap is stored in one object. It is an array of 76fa9e4066Sahrens * 1<<ZAP_BLOCK_SHIFT byte blocks. The layout looks like one of: 77fa9e4066Sahrens * 78fa9e4066Sahrens * ptrtbl fits in first block: 79fa9e4066Sahrens * [zap_phys_t zap_ptrtbl_shift < 6] [zap_leaf_t] ... 80fa9e4066Sahrens * 81fa9e4066Sahrens * ptrtbl too big for first block: 82fa9e4066Sahrens * [zap_phys_t zap_ptrtbl_shift >= 6] [zap_leaf_t] [ptrtbl] ... 83fa9e4066Sahrens * 84fa9e4066Sahrens */ 85fa9e4066Sahrens 86fa9e4066Sahrens struct dmu_buf; 87fa9e4066Sahrens struct zap_leaf; 88fa9e4066Sahrens 89fa9e4066Sahrens #define ZBT_LEAF ((1ULL << 63) + 0) 90fa9e4066Sahrens #define ZBT_HEADER ((1ULL << 63) + 1) 91fa9e4066Sahrens #define ZBT_MICRO ((1ULL << 63) + 3) 92fa9e4066Sahrens /* any other values are ptrtbl blocks */ 93fa9e4066Sahrens 94fa9e4066Sahrens /* 1/2 the block size */ 95fa9e4066Sahrens #define ZAP_PTRTBL_MIN_SHIFT (ZAP_BLOCK_SHIFT - 3 - 1) 96fa9e4066Sahrens 97fa9e4066Sahrens /* 98fa9e4066Sahrens * TAKE NOTE: 99fa9e4066Sahrens * If zap_phys_t is modified, zap_byteswap() must be modified. 100fa9e4066Sahrens */ 101fa9e4066Sahrens typedef struct zap_phys { 102fa9e4066Sahrens uint64_t zap_block_type; /* ZBT_HEADER */ 103fa9e4066Sahrens uint64_t zap_magic; /* ZAP_MAGIC */ 104fa9e4066Sahrens 105fa9e4066Sahrens struct zap_table_phys { 106fa9e4066Sahrens uint64_t zt_blk; /* starting block number */ 107fa9e4066Sahrens uint64_t zt_numblks; /* number of blocks */ 108fa9e4066Sahrens uint64_t zt_shift; /* bits to index it */ 109fa9e4066Sahrens uint64_t zt_nextblk; /* next (larger) copy start block */ 110fa9e4066Sahrens uint64_t zt_blks_copied; /* number source blocks copied */ 111fa9e4066Sahrens } zap_ptrtbl; 112fa9e4066Sahrens 113fa9e4066Sahrens uint64_t zap_freeblk; /* the next free block */ 114fa9e4066Sahrens uint64_t zap_num_leafs; /* number of leafs */ 115fa9e4066Sahrens uint64_t zap_num_entries; /* number of entries */ 116fa9e4066Sahrens uint64_t zap_salt; /* salt to stir into hash function */ 117fa9e4066Sahrens uint64_t zap_pad[8181]; 118fa9e4066Sahrens uint64_t zap_leafs[1 << ZAP_PTRTBL_MIN_SHIFT]; 119fa9e4066Sahrens } zap_phys_t; 120fa9e4066Sahrens 121fa9e4066Sahrens typedef struct zap_table_phys zap_table_phys_t; 122fa9e4066Sahrens 123fa9e4066Sahrens typedef struct zap { 124fa9e4066Sahrens objset_t *zap_objset; 125fa9e4066Sahrens uint64_t zap_object; 126fa9e4066Sahrens struct dmu_buf *zap_dbuf; 127fa9e4066Sahrens krwlock_t zap_rwlock; 128fa9e4066Sahrens int zap_ismicro; 129fa9e4066Sahrens uint64_t zap_salt; 130fa9e4066Sahrens union { 131fa9e4066Sahrens struct { 132fa9e4066Sahrens zap_phys_t *zap_phys; 133fa9e4066Sahrens 134fa9e4066Sahrens /* 135fa9e4066Sahrens * zap_num_entries_mtx protects 136fa9e4066Sahrens * zap_num_entries 137fa9e4066Sahrens */ 138fa9e4066Sahrens kmutex_t zap_num_entries_mtx; 139fa9e4066Sahrens } zap_fat; 140fa9e4066Sahrens struct { 141fa9e4066Sahrens mzap_phys_t *zap_phys; 142fa9e4066Sahrens int16_t zap_num_entries; 143fa9e4066Sahrens int16_t zap_num_chunks; 144fa9e4066Sahrens int16_t zap_alloc_next; 145fa9e4066Sahrens avl_tree_t zap_avl; 146fa9e4066Sahrens } zap_micro; 147fa9e4066Sahrens } zap_u; 148fa9e4066Sahrens } zap_t; 149fa9e4066Sahrens 150fa9e4066Sahrens #define zap_f zap_u.zap_fat 151fa9e4066Sahrens #define zap_m zap_u.zap_micro 152fa9e4066Sahrens 153fa9e4066Sahrens uint64_t zap_hash(zap_t *zap, const char *name); 154fa9e4066Sahrens int zap_lockdir(objset_t *os, uint64_t obj, dmu_tx_t *tx, 155fa9e4066Sahrens krw_t lti, int fatreader, zap_t **zapp); 156fa9e4066Sahrens void zap_unlockdir(zap_t *zap); 157fa9e4066Sahrens void zap_pageout(dmu_buf_t *db, void *vmzap); 158fa9e4066Sahrens 159fa9e4066Sahrens void zap_print(zap_t *); 160fa9e4066Sahrens struct zap_leaf *zap_create_leaf(zap_t *zd, dmu_tx_t *tx); 161fa9e4066Sahrens void zap_destroy_leaf(zap_t *zap, struct zap_leaf *l, dmu_tx_t *tx); 162fa9e4066Sahrens uint64_t zap_allocate_blocks(zap_t *zap, int nblocks, dmu_tx_t *tx); 163fa9e4066Sahrens 164fa9e4066Sahrens #define ZAP_HASH_IDX(hash, n) (((n) == 0) ? 0 : ((hash) >> (64 - (n)))) 165fa9e4066Sahrens 166fa9e4066Sahrens void fzap_byteswap(void *buf, size_t size); 167fa9e4066Sahrens int fzap_count(zap_t *zap, uint64_t *count); 168fa9e4066Sahrens int fzap_lookup(zap_t *zap, const char *name, 169fa9e4066Sahrens uint64_t integer_size, uint64_t num_integers, void *buf); 170fa9e4066Sahrens int fzap_add(zap_t *zap, const char *name, 171fa9e4066Sahrens uint64_t integer_size, uint64_t num_integers, 172fa9e4066Sahrens const void *val, dmu_tx_t *tx); 173fa9e4066Sahrens int fzap_update(zap_t *zap, const char *name, 174fa9e4066Sahrens int integer_size, uint64_t num_integers, const void *val, dmu_tx_t *tx); 175fa9e4066Sahrens int fzap_length(zap_t *zap, const char *name, 176fa9e4066Sahrens uint64_t *integer_size, uint64_t *num_integers); 177fa9e4066Sahrens int fzap_remove(zap_t *zap, const char *name, dmu_tx_t *tx); 178fa9e4066Sahrens int fzap_cursor_retrieve(zap_t *zap, zap_cursor_t *zc, zap_attribute_t *za); 179fa9e4066Sahrens void fzap_get_stats(zap_t *zap, zap_stats_t *zs); 180*87e5029aSahrens void zap_put_leaf(struct zap_leaf *l); 181fa9e4066Sahrens 182fa9e4066Sahrens int fzap_add_cd(zap_t *zap, const char *name, 183fa9e4066Sahrens uint64_t integer_size, uint64_t num_integers, 184fa9e4066Sahrens const void *val, uint32_t cd, dmu_tx_t *tx, struct zap_leaf **lp); 185fa9e4066Sahrens void fzap_upgrade(zap_t *zap, dmu_tx_t *tx); 186fa9e4066Sahrens 187fa9e4066Sahrens #ifdef __cplusplus 188fa9e4066Sahrens } 189fa9e4066Sahrens #endif 190fa9e4066Sahrens 191fa9e4066Sahrens #endif /* _SYS_ZAP_IMPL_H */ 192