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Diffstat (limited to 'include/sys/zap_impl.h')
| -rw-r--r-- | include/sys/zap_impl.h | 240 |
1 files changed, 240 insertions, 0 deletions
diff --git a/include/sys/zap_impl.h b/include/sys/zap_impl.h new file mode 100644 index 0000000000000..250dde3ce235a --- /dev/null +++ b/include/sys/zap_impl.h @@ -0,0 +1,240 @@ +/* + * CDDL HEADER START + * + * The contents of this file are subject to the terms of the + * Common Development and Distribution License (the "License"). + * You may not use this file except in compliance with the License. + * + * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE + * or http://www.opensolaris.org/os/licensing. + * See the License for the specific language governing permissions + * and limitations under the License. + * + * When distributing Covered Code, include this CDDL HEADER in each + * file and include the License file at usr/src/OPENSOLARIS.LICENSE. + * If applicable, add the following below this CDDL HEADER, with the + * fields enclosed by brackets "[]" replaced with your own identifying + * information: Portions Copyright [yyyy] [name of copyright owner] + * + * CDDL HEADER END + */ + +/* + * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. + * Copyright (c) 2014 Spectra Logic Corporation, All rights reserved. + * Copyright (c) 2013, 2016 by Delphix. All rights reserved. + * Copyright 2017 Nexenta Systems, Inc. + */ + +#ifndef _SYS_ZAP_IMPL_H +#define _SYS_ZAP_IMPL_H + +#include <sys/zap.h> +#include <sys/zfs_context.h> +#include <sys/avl.h> + +#ifdef __cplusplus +extern "C" { +#endif + +extern int fzap_default_block_shift; + +#define ZAP_MAGIC 0x2F52AB2ABULL + +#define FZAP_BLOCK_SHIFT(zap) ((zap)->zap_f.zap_block_shift) + +#define MZAP_ENT_LEN 64 +#define MZAP_NAME_LEN (MZAP_ENT_LEN - 8 - 4 - 2) +#define MZAP_MAX_BLKSZ SPA_OLD_MAXBLOCKSIZE + +#define ZAP_NEED_CD (-1U) + +typedef struct mzap_ent_phys { + uint64_t mze_value; + uint32_t mze_cd; + uint16_t mze_pad; /* in case we want to chain them someday */ + char mze_name[MZAP_NAME_LEN]; +} mzap_ent_phys_t; + +typedef struct mzap_phys { + uint64_t mz_block_type; /* ZBT_MICRO */ + uint64_t mz_salt; + uint64_t mz_normflags; + uint64_t mz_pad[5]; + mzap_ent_phys_t mz_chunk[1]; + /* actually variable size depending on block size */ +} mzap_phys_t; + +typedef struct mzap_ent { + avl_node_t mze_node; + int mze_chunkid; + uint64_t mze_hash; + uint32_t mze_cd; /* copy from mze_phys->mze_cd */ +} mzap_ent_t; + +#define MZE_PHYS(zap, mze) \ + (&zap_m_phys(zap)->mz_chunk[(mze)->mze_chunkid]) + +/* + * The (fat) zap is stored in one object. It is an array of + * 1<<FZAP_BLOCK_SHIFT byte blocks. The layout looks like one of: + * + * ptrtbl fits in first block: + * [zap_phys_t zap_ptrtbl_shift < 6] [zap_leaf_t] ... + * + * ptrtbl too big for first block: + * [zap_phys_t zap_ptrtbl_shift >= 6] [zap_leaf_t] [ptrtbl] ... + * + */ + +struct dmu_buf; +struct zap_leaf; + +#define ZBT_LEAF ((1ULL << 63) + 0) +#define ZBT_HEADER ((1ULL << 63) + 1) +#define ZBT_MICRO ((1ULL << 63) + 3) +/* any other values are ptrtbl blocks */ + +/* + * the embedded pointer table takes up half a block: + * block size / entry size (2^3) / 2 + */ +#define ZAP_EMBEDDED_PTRTBL_SHIFT(zap) (FZAP_BLOCK_SHIFT(zap) - 3 - 1) + +/* + * The embedded pointer table starts half-way through the block. Since + * the pointer table itself is half the block, it starts at (64-bit) + * word number (1<<ZAP_EMBEDDED_PTRTBL_SHIFT(zap)). + */ +#define ZAP_EMBEDDED_PTRTBL_ENT(zap, idx) \ + ((uint64_t *)zap_f_phys(zap)) \ + [(idx) + (1<<ZAP_EMBEDDED_PTRTBL_SHIFT(zap))] + +/* + * TAKE NOTE: + * If zap_phys_t is modified, zap_byteswap() must be modified. + */ +typedef struct zap_phys { + uint64_t zap_block_type; /* ZBT_HEADER */ + uint64_t zap_magic; /* ZAP_MAGIC */ + + struct zap_table_phys { + uint64_t zt_blk; /* starting block number */ + uint64_t zt_numblks; /* number of blocks */ + uint64_t zt_shift; /* bits to index it */ + uint64_t zt_nextblk; /* next (larger) copy start block */ + uint64_t zt_blks_copied; /* number source blocks copied */ + } zap_ptrtbl; + + uint64_t zap_freeblk; /* the next free block */ + uint64_t zap_num_leafs; /* number of leafs */ + uint64_t zap_num_entries; /* number of entries */ + uint64_t zap_salt; /* salt to stir into hash function */ + uint64_t zap_normflags; /* flags for u8_textprep_str() */ + uint64_t zap_flags; /* zap_flags_t */ + /* + * This structure is followed by padding, and then the embedded + * pointer table. The embedded pointer table takes up second + * half of the block. It is accessed using the + * ZAP_EMBEDDED_PTRTBL_ENT() macro. + */ +} zap_phys_t; + +typedef struct zap_table_phys zap_table_phys_t; + +typedef struct zap { + dmu_buf_user_t zap_dbu; + objset_t *zap_objset; + uint64_t zap_object; + struct dmu_buf *zap_dbuf; + krwlock_t zap_rwlock; + boolean_t zap_ismicro; + int zap_normflags; + uint64_t zap_salt; + union { + struct { + /* + * zap_num_entries_mtx protects + * zap_num_entries + */ + kmutex_t zap_num_entries_mtx; + int zap_block_shift; + } zap_fat; + struct { + int16_t zap_num_entries; + int16_t zap_num_chunks; + int16_t zap_alloc_next; + avl_tree_t zap_avl; + } zap_micro; + } zap_u; +} zap_t; + +static inline zap_phys_t * +zap_f_phys(zap_t *zap) +{ + return (zap->zap_dbuf->db_data); +} + +static inline mzap_phys_t * +zap_m_phys(zap_t *zap) +{ + return (zap->zap_dbuf->db_data); +} + +typedef struct zap_name { + zap_t *zn_zap; + int zn_key_intlen; + const void *zn_key_orig; + int zn_key_orig_numints; + const void *zn_key_norm; + int zn_key_norm_numints; + uint64_t zn_hash; + matchtype_t zn_matchtype; + int zn_normflags; + char zn_normbuf[ZAP_MAXNAMELEN]; +} zap_name_t; + +#define zap_f zap_u.zap_fat +#define zap_m zap_u.zap_micro + +boolean_t zap_match(zap_name_t *zn, const char *matchname); +int zap_lockdir(objset_t *os, uint64_t obj, dmu_tx_t *tx, + krw_t lti, boolean_t fatreader, boolean_t adding, void *tag, zap_t **zapp); +void zap_unlockdir(zap_t *zap, void *tag); +void zap_evict_sync(void *dbu); +zap_name_t *zap_name_alloc(zap_t *zap, const char *key, matchtype_t mt); +void zap_name_free(zap_name_t *zn); +int zap_hashbits(zap_t *zap); +uint32_t zap_maxcd(zap_t *zap); +uint64_t zap_getflags(zap_t *zap); + +#define ZAP_HASH_IDX(hash, n) (((n) == 0) ? 0 : ((hash) >> (64 - (n)))) + +void fzap_byteswap(void *buf, size_t size); +int fzap_count(zap_t *zap, uint64_t *count); +int fzap_lookup(zap_name_t *zn, + uint64_t integer_size, uint64_t num_integers, void *buf, + char *realname, int rn_len, boolean_t *normalization_conflictp); +void fzap_prefetch(zap_name_t *zn); +int fzap_add(zap_name_t *zn, uint64_t integer_size, uint64_t num_integers, + const void *val, void *tag, dmu_tx_t *tx); +int fzap_update(zap_name_t *zn, + int integer_size, uint64_t num_integers, const void *val, + void *tag, dmu_tx_t *tx); +int fzap_length(zap_name_t *zn, + uint64_t *integer_size, uint64_t *num_integers); +int fzap_remove(zap_name_t *zn, dmu_tx_t *tx); +int fzap_cursor_retrieve(zap_t *zap, zap_cursor_t *zc, zap_attribute_t *za); +void fzap_get_stats(zap_t *zap, zap_stats_t *zs); +void zap_put_leaf(struct zap_leaf *l); + +int fzap_add_cd(zap_name_t *zn, + uint64_t integer_size, uint64_t num_integers, + const void *val, uint32_t cd, void *tag, dmu_tx_t *tx); +void fzap_upgrade(zap_t *zap, dmu_tx_t *tx, zap_flags_t flags); + +#ifdef __cplusplus +} +#endif + +#endif /* _SYS_ZAP_IMPL_H */ |