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1 | /* |
2 | * CDDL HEADER START | |
3 | * | |
4 | * The contents of this file are subject to the terms of the | |
5 | * Common Development and Distribution License (the "License"). | |
6 | * You may not use this file except in compliance with the License. | |
7 | * | |
8 | * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE | |
9 | * or http://www.opensolaris.org/os/licensing. | |
10 | * See the License for the specific language governing permissions | |
11 | * and limitations under the License. | |
12 | * | |
13 | * When distributing Covered Code, include this CDDL HEADER in each | |
14 | * file and include the License file at usr/src/OPENSOLARIS.LICENSE. | |
15 | * If applicable, add the following below this CDDL HEADER, with the | |
16 | * fields enclosed by brackets "[]" replaced with your own identifying | |
17 | * information: Portions Copyright [yyyy] [name of copyright owner] | |
18 | * | |
19 | * CDDL HEADER END | |
20 | */ | |
86e3c28a | 21 | |
70e083d2 TG |
22 | /* |
23 | * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. | |
24 | * Copyright (c) 2014 Spectra Logic Corporation, All rights reserved. | |
86e3c28a CIK |
25 | * Copyright (c) 2013, 2016 by Delphix. All rights reserved. |
26 | * Copyright 2017 Nexenta Systems, Inc. | |
70e083d2 TG |
27 | */ |
28 | ||
29 | #ifndef _SYS_ZAP_IMPL_H | |
30 | #define _SYS_ZAP_IMPL_H | |
31 | ||
32 | #include <sys/zap.h> | |
33 | #include <sys/zfs_context.h> | |
34 | #include <sys/avl.h> | |
35 | ||
36 | #ifdef __cplusplus | |
37 | extern "C" { | |
38 | #endif | |
39 | ||
40 | extern int fzap_default_block_shift; | |
41 | ||
42 | #define ZAP_MAGIC 0x2F52AB2ABULL | |
43 | ||
44 | #define FZAP_BLOCK_SHIFT(zap) ((zap)->zap_f.zap_block_shift) | |
45 | ||
46 | #define MZAP_ENT_LEN 64 | |
47 | #define MZAP_NAME_LEN (MZAP_ENT_LEN - 8 - 4 - 2) | |
48 | #define MZAP_MAX_BLKSZ SPA_OLD_MAXBLOCKSIZE | |
49 | ||
50 | #define ZAP_NEED_CD (-1U) | |
51 | ||
52 | typedef struct mzap_ent_phys { | |
53 | uint64_t mze_value; | |
54 | uint32_t mze_cd; | |
55 | uint16_t mze_pad; /* in case we want to chain them someday */ | |
56 | char mze_name[MZAP_NAME_LEN]; | |
57 | } mzap_ent_phys_t; | |
58 | ||
59 | typedef struct mzap_phys { | |
60 | uint64_t mz_block_type; /* ZBT_MICRO */ | |
61 | uint64_t mz_salt; | |
62 | uint64_t mz_normflags; | |
63 | uint64_t mz_pad[5]; | |
64 | mzap_ent_phys_t mz_chunk[1]; | |
65 | /* actually variable size depending on block size */ | |
66 | } mzap_phys_t; | |
67 | ||
68 | typedef struct mzap_ent { | |
69 | avl_node_t mze_node; | |
70 | int mze_chunkid; | |
71 | uint64_t mze_hash; | |
72 | uint32_t mze_cd; /* copy from mze_phys->mze_cd */ | |
73 | } mzap_ent_t; | |
74 | ||
75 | #define MZE_PHYS(zap, mze) \ | |
76 | (&zap_m_phys(zap)->mz_chunk[(mze)->mze_chunkid]) | |
77 | ||
78 | /* | |
79 | * The (fat) zap is stored in one object. It is an array of | |
80 | * 1<<FZAP_BLOCK_SHIFT byte blocks. The layout looks like one of: | |
81 | * | |
82 | * ptrtbl fits in first block: | |
83 | * [zap_phys_t zap_ptrtbl_shift < 6] [zap_leaf_t] ... | |
84 | * | |
85 | * ptrtbl too big for first block: | |
86 | * [zap_phys_t zap_ptrtbl_shift >= 6] [zap_leaf_t] [ptrtbl] ... | |
87 | * | |
88 | */ | |
89 | ||
90 | struct dmu_buf; | |
91 | struct zap_leaf; | |
92 | ||
93 | #define ZBT_LEAF ((1ULL << 63) + 0) | |
94 | #define ZBT_HEADER ((1ULL << 63) + 1) | |
95 | #define ZBT_MICRO ((1ULL << 63) + 3) | |
96 | /* any other values are ptrtbl blocks */ | |
97 | ||
98 | /* | |
99 | * the embedded pointer table takes up half a block: | |
100 | * block size / entry size (2^3) / 2 | |
101 | */ | |
102 | #define ZAP_EMBEDDED_PTRTBL_SHIFT(zap) (FZAP_BLOCK_SHIFT(zap) - 3 - 1) | |
103 | ||
104 | /* | |
105 | * The embedded pointer table starts half-way through the block. Since | |
106 | * the pointer table itself is half the block, it starts at (64-bit) | |
107 | * word number (1<<ZAP_EMBEDDED_PTRTBL_SHIFT(zap)). | |
108 | */ | |
109 | #define ZAP_EMBEDDED_PTRTBL_ENT(zap, idx) \ | |
110 | ((uint64_t *)zap_f_phys(zap)) \ | |
111 | [(idx) + (1<<ZAP_EMBEDDED_PTRTBL_SHIFT(zap))] | |
112 | ||
113 | /* | |
114 | * TAKE NOTE: | |
115 | * If zap_phys_t is modified, zap_byteswap() must be modified. | |
116 | */ | |
117 | typedef struct zap_phys { | |
118 | uint64_t zap_block_type; /* ZBT_HEADER */ | |
119 | uint64_t zap_magic; /* ZAP_MAGIC */ | |
120 | ||
121 | struct zap_table_phys { | |
122 | uint64_t zt_blk; /* starting block number */ | |
123 | uint64_t zt_numblks; /* number of blocks */ | |
124 | uint64_t zt_shift; /* bits to index it */ | |
125 | uint64_t zt_nextblk; /* next (larger) copy start block */ | |
126 | uint64_t zt_blks_copied; /* number source blocks copied */ | |
127 | } zap_ptrtbl; | |
128 | ||
129 | uint64_t zap_freeblk; /* the next free block */ | |
130 | uint64_t zap_num_leafs; /* number of leafs */ | |
131 | uint64_t zap_num_entries; /* number of entries */ | |
132 | uint64_t zap_salt; /* salt to stir into hash function */ | |
133 | uint64_t zap_normflags; /* flags for u8_textprep_str() */ | |
134 | uint64_t zap_flags; /* zap_flags_t */ | |
135 | /* | |
136 | * This structure is followed by padding, and then the embedded | |
137 | * pointer table. The embedded pointer table takes up second | |
138 | * half of the block. It is accessed using the | |
139 | * ZAP_EMBEDDED_PTRTBL_ENT() macro. | |
140 | */ | |
141 | } zap_phys_t; | |
142 | ||
143 | typedef struct zap_table_phys zap_table_phys_t; | |
144 | ||
145 | typedef struct zap { | |
146 | dmu_buf_user_t zap_dbu; | |
147 | objset_t *zap_objset; | |
148 | uint64_t zap_object; | |
149 | struct dmu_buf *zap_dbuf; | |
150 | krwlock_t zap_rwlock; | |
151 | boolean_t zap_ismicro; | |
152 | int zap_normflags; | |
153 | uint64_t zap_salt; | |
154 | union { | |
155 | struct { | |
156 | /* | |
157 | * zap_num_entries_mtx protects | |
158 | * zap_num_entries | |
159 | */ | |
160 | kmutex_t zap_num_entries_mtx; | |
161 | int zap_block_shift; | |
162 | } zap_fat; | |
163 | struct { | |
164 | int16_t zap_num_entries; | |
165 | int16_t zap_num_chunks; | |
166 | int16_t zap_alloc_next; | |
167 | avl_tree_t zap_avl; | |
168 | } zap_micro; | |
169 | } zap_u; | |
170 | } zap_t; | |
171 | ||
172 | static inline zap_phys_t * | |
173 | zap_f_phys(zap_t *zap) | |
174 | { | |
175 | return (zap->zap_dbuf->db_data); | |
176 | } | |
177 | ||
178 | static inline mzap_phys_t * | |
179 | zap_m_phys(zap_t *zap) | |
180 | { | |
181 | return (zap->zap_dbuf->db_data); | |
182 | } | |
183 | ||
184 | typedef struct zap_name { | |
185 | zap_t *zn_zap; | |
186 | int zn_key_intlen; | |
187 | const void *zn_key_orig; | |
188 | int zn_key_orig_numints; | |
189 | const void *zn_key_norm; | |
190 | int zn_key_norm_numints; | |
191 | uint64_t zn_hash; | |
192 | matchtype_t zn_matchtype; | |
86e3c28a | 193 | int zn_normflags; |
70e083d2 TG |
194 | char zn_normbuf[ZAP_MAXNAMELEN]; |
195 | } zap_name_t; | |
196 | ||
197 | #define zap_f zap_u.zap_fat | |
198 | #define zap_m zap_u.zap_micro | |
199 | ||
200 | boolean_t zap_match(zap_name_t *zn, const char *matchname); | |
201 | int zap_lockdir(objset_t *os, uint64_t obj, dmu_tx_t *tx, | |
86e3c28a CIK |
202 | krw_t lti, boolean_t fatreader, boolean_t adding, void *tag, zap_t **zapp); |
203 | void zap_unlockdir(zap_t *zap, void *tag); | |
204 | void zap_evict_sync(void *dbu); | |
70e083d2 TG |
205 | zap_name_t *zap_name_alloc(zap_t *zap, const char *key, matchtype_t mt); |
206 | void zap_name_free(zap_name_t *zn); | |
207 | int zap_hashbits(zap_t *zap); | |
208 | uint32_t zap_maxcd(zap_t *zap); | |
209 | uint64_t zap_getflags(zap_t *zap); | |
210 | ||
211 | #define ZAP_HASH_IDX(hash, n) (((n) == 0) ? 0 : ((hash) >> (64 - (n)))) | |
212 | ||
213 | void fzap_byteswap(void *buf, size_t size); | |
214 | int fzap_count(zap_t *zap, uint64_t *count); | |
215 | int fzap_lookup(zap_name_t *zn, | |
216 | uint64_t integer_size, uint64_t num_integers, void *buf, | |
217 | char *realname, int rn_len, boolean_t *normalization_conflictp); | |
218 | void fzap_prefetch(zap_name_t *zn); | |
70e083d2 | 219 | int fzap_add(zap_name_t *zn, uint64_t integer_size, uint64_t num_integers, |
86e3c28a | 220 | const void *val, void *tag, dmu_tx_t *tx); |
70e083d2 | 221 | int fzap_update(zap_name_t *zn, |
86e3c28a CIK |
222 | int integer_size, uint64_t num_integers, const void *val, |
223 | void *tag, dmu_tx_t *tx); | |
70e083d2 TG |
224 | int fzap_length(zap_name_t *zn, |
225 | uint64_t *integer_size, uint64_t *num_integers); | |
226 | int fzap_remove(zap_name_t *zn, dmu_tx_t *tx); | |
227 | int fzap_cursor_retrieve(zap_t *zap, zap_cursor_t *zc, zap_attribute_t *za); | |
228 | void fzap_get_stats(zap_t *zap, zap_stats_t *zs); | |
229 | void zap_put_leaf(struct zap_leaf *l); | |
230 | ||
231 | int fzap_add_cd(zap_name_t *zn, | |
232 | uint64_t integer_size, uint64_t num_integers, | |
86e3c28a | 233 | const void *val, uint32_t cd, void *tag, dmu_tx_t *tx); |
70e083d2 TG |
234 | void fzap_upgrade(zap_t *zap, dmu_tx_t *tx, zap_flags_t flags); |
235 | ||
236 | #ifdef __cplusplus | |
237 | } | |
238 | #endif | |
239 | ||
240 | #endif /* _SYS_ZAP_IMPL_H */ |