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34dc7c2f BB |
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 | |
1d3ba0bf | 9 | * or https://opensource.org/licenses/CDDL-1.0. |
34dc7c2f BB |
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 | */ | |
21 | /* | |
428870ff | 22 | * Copyright 2010 Sun Microsystems, Inc. All rights reserved. |
34dc7c2f BB |
23 | * Use is subject to license terms. |
24 | */ | |
29809a6c | 25 | /* |
4747a7d3 | 26 | * Copyright (c) 2012, 2017 by Delphix. All rights reserved. |
29809a6c | 27 | */ |
34dc7c2f BB |
28 | |
29 | #ifndef _SYS_TXG_H | |
30 | #define _SYS_TXG_H | |
31 | ||
34dc7c2f BB |
32 | #include <sys/spa.h> |
33 | #include <sys/zfs_context.h> | |
34 | ||
35 | #ifdef __cplusplus | |
36 | extern "C" { | |
37 | #endif | |
38 | ||
39 | #define TXG_CONCURRENT_STATES 3 /* open, quiescing, syncing */ | |
40 | #define TXG_SIZE 4 /* next power of 2 */ | |
41 | #define TXG_MASK (TXG_SIZE - 1) /* mask for size */ | |
42 | #define TXG_INITIAL TXG_SIZE /* initial txg */ | |
43 | #define TXG_IDX (txg & TXG_MASK) | |
b2255edc | 44 | #define TXG_UNKNOWN 0 |
34dc7c2f | 45 | |
428870ff BB |
46 | /* Number of txgs worth of frees we defer adding to in-core spacemaps */ |
47 | #define TXG_DEFER_SIZE 2 | |
48 | ||
34dc7c2f BB |
49 | typedef struct tx_cpu tx_cpu_t; |
50 | ||
51 | typedef struct txg_handle { | |
52 | tx_cpu_t *th_cpu; | |
53 | uint64_t th_txg; | |
54 | } txg_handle_t; | |
55 | ||
56 | typedef struct txg_node { | |
57 | struct txg_node *tn_next[TXG_SIZE]; | |
58 | uint8_t tn_member[TXG_SIZE]; | |
59 | } txg_node_t; | |
60 | ||
61 | typedef struct txg_list { | |
62 | kmutex_t tl_lock; | |
63 | size_t tl_offset; | |
4747a7d3 | 64 | spa_t *tl_spa; |
34dc7c2f BB |
65 | txg_node_t *tl_head[TXG_SIZE]; |
66 | } txg_list_t; | |
67 | ||
68 | struct dsl_pool; | |
69 | ||
70 | extern void txg_init(struct dsl_pool *dp, uint64_t txg); | |
71 | extern void txg_fini(struct dsl_pool *dp); | |
72 | extern void txg_sync_start(struct dsl_pool *dp); | |
73 | extern void txg_sync_stop(struct dsl_pool *dp); | |
74 | extern uint64_t txg_hold_open(struct dsl_pool *dp, txg_handle_t *txghp); | |
75 | extern void txg_rele_to_quiesce(txg_handle_t *txghp); | |
76 | extern void txg_rele_to_sync(txg_handle_t *txghp); | |
428870ff | 77 | extern void txg_register_callbacks(txg_handle_t *txghp, list_t *tx_callbacks); |
34dc7c2f | 78 | |
63fd3c6c AL |
79 | extern void txg_delay(struct dsl_pool *dp, uint64_t txg, hrtime_t delta, |
80 | hrtime_t resolution); | |
50e09edd | 81 | extern void txg_kick(struct dsl_pool *dp, uint64_t txg); |
34dc7c2f BB |
82 | |
83 | /* | |
84 | * Wait until the given transaction group has finished syncing. | |
85 | * Try to make this happen as soon as possible (eg. kick off any | |
86 | * necessary syncs immediately). If txg==0, wait for the currently open | |
87 | * txg to finish syncing. | |
88 | */ | |
89 | extern void txg_wait_synced(struct dsl_pool *dp, uint64_t txg); | |
90 | ||
186898bb DB |
91 | /* |
92 | * Wait as above. Returns true if the thread was signaled while waiting. | |
93 | */ | |
94 | extern boolean_t txg_wait_synced_sig(struct dsl_pool *dp, uint64_t txg); | |
95 | ||
34dc7c2f BB |
96 | /* |
97 | * Wait until the given transaction group, or one after it, is | |
98 | * the open transaction group. Try to make this happen as soon | |
1b939560 BB |
99 | * as possible (eg. kick off any necessary syncs immediately) when |
100 | * should_quiesce is set. If txg == 0, wait for the next open txg. | |
34dc7c2f | 101 | */ |
1b939560 BB |
102 | extern void txg_wait_open(struct dsl_pool *dp, uint64_t txg, |
103 | boolean_t should_quiesce); | |
34dc7c2f BB |
104 | |
105 | /* | |
106 | * Returns TRUE if we are "backed up" waiting for the syncing | |
107 | * transaction to complete; otherwise returns FALSE. | |
108 | */ | |
b128c09f BB |
109 | extern boolean_t txg_stalled(struct dsl_pool *dp); |
110 | ||
111 | /* returns TRUE if someone is waiting for the next txg to sync */ | |
112 | extern boolean_t txg_sync_waiting(struct dsl_pool *dp); | |
34dc7c2f | 113 | |
4747a7d3 MA |
114 | extern void txg_verify(spa_t *spa, uint64_t txg); |
115 | ||
54a179e7 RC |
116 | /* |
117 | * Wait for pending commit callbacks of already-synced transactions to finish | |
118 | * processing. | |
119 | */ | |
120 | extern void txg_wait_callbacks(struct dsl_pool *dp); | |
121 | ||
34dc7c2f BB |
122 | /* |
123 | * Per-txg object lists. | |
124 | */ | |
125 | ||
126 | #define TXG_CLEAN(txg) ((txg) - 1) | |
127 | ||
4747a7d3 | 128 | extern void txg_list_create(txg_list_t *tl, spa_t *spa, size_t offset); |
34dc7c2f | 129 | extern void txg_list_destroy(txg_list_t *tl); |
29809a6c | 130 | extern boolean_t txg_list_empty(txg_list_t *tl, uint64_t txg); |
acbad6ff | 131 | extern boolean_t txg_all_lists_empty(txg_list_t *tl); |
13fe0198 MA |
132 | extern boolean_t txg_list_add(txg_list_t *tl, void *p, uint64_t txg); |
133 | extern boolean_t txg_list_add_tail(txg_list_t *tl, void *p, uint64_t txg); | |
34dc7c2f BB |
134 | extern void *txg_list_remove(txg_list_t *tl, uint64_t txg); |
135 | extern void *txg_list_remove_this(txg_list_t *tl, void *p, uint64_t txg); | |
13fe0198 | 136 | extern boolean_t txg_list_member(txg_list_t *tl, void *p, uint64_t txg); |
34dc7c2f BB |
137 | extern void *txg_list_head(txg_list_t *tl, uint64_t txg); |
138 | extern void *txg_list_next(txg_list_t *tl, void *p, uint64_t txg); | |
139 | ||
87d98efe | 140 | /* Global tuning */ |
fdc2d303 | 141 | extern uint_t zfs_txg_timeout; |
87d98efe | 142 | |
8c4fb36a TC |
143 | |
144 | #ifdef ZFS_DEBUG | |
145 | #define TXG_VERIFY(spa, txg) txg_verify(spa, txg) | |
146 | #else | |
147 | #define TXG_VERIFY(spa, txg) | |
148 | #endif | |
149 | ||
34dc7c2f BB |
150 | #ifdef __cplusplus |
151 | } | |
152 | #endif | |
153 | ||
154 | #endif /* _SYS_TXG_H */ |