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