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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 | |
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 | */ | |
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) | |
44 | ||
428870ff BB |
45 | /* Number of txgs worth of frees we defer adding to in-core spacemaps */ |
46 | #define TXG_DEFER_SIZE 2 | |
47 | ||
34dc7c2f BB |
48 | typedef struct tx_cpu tx_cpu_t; |
49 | ||
50 | typedef struct txg_handle { | |
51 | tx_cpu_t *th_cpu; | |
52 | uint64_t th_txg; | |
53 | } txg_handle_t; | |
54 | ||
55 | typedef struct txg_node { | |
56 | struct txg_node *tn_next[TXG_SIZE]; | |
57 | uint8_t tn_member[TXG_SIZE]; | |
58 | } txg_node_t; | |
59 | ||
60 | typedef struct txg_list { | |
61 | kmutex_t tl_lock; | |
62 | size_t tl_offset; | |
4747a7d3 | 63 | spa_t *tl_spa; |
34dc7c2f BB |
64 | txg_node_t *tl_head[TXG_SIZE]; |
65 | } txg_list_t; | |
66 | ||
67 | struct dsl_pool; | |
68 | ||
69 | extern void txg_init(struct dsl_pool *dp, uint64_t txg); | |
70 | extern void txg_fini(struct dsl_pool *dp); | |
71 | extern void txg_sync_start(struct dsl_pool *dp); | |
72 | extern void txg_sync_stop(struct dsl_pool *dp); | |
73 | extern uint64_t txg_hold_open(struct dsl_pool *dp, txg_handle_t *txghp); | |
74 | extern void txg_rele_to_quiesce(txg_handle_t *txghp); | |
75 | extern void txg_rele_to_sync(txg_handle_t *txghp); | |
428870ff | 76 | extern void txg_register_callbacks(txg_handle_t *txghp, list_t *tx_callbacks); |
34dc7c2f | 77 | |
63fd3c6c AL |
78 | extern void txg_delay(struct dsl_pool *dp, uint64_t txg, hrtime_t delta, |
79 | hrtime_t resolution); | |
e8b96c60 | 80 | extern void txg_kick(struct dsl_pool *dp); |
34dc7c2f BB |
81 | |
82 | /* | |
83 | * Wait until the given transaction group has finished syncing. | |
84 | * Try to make this happen as soon as possible (eg. kick off any | |
85 | * necessary syncs immediately). If txg==0, wait for the currently open | |
86 | * txg to finish syncing. | |
87 | */ | |
88 | extern void txg_wait_synced(struct dsl_pool *dp, uint64_t txg); | |
89 | ||
90 | /* | |
91 | * Wait until the given transaction group, or one after it, is | |
92 | * the open transaction group. Try to make this happen as soon | |
93 | * as possible (eg. kick off any necessary syncs immediately). | |
94 | * If txg == 0, wait for the next open txg. | |
95 | */ | |
96 | extern void txg_wait_open(struct dsl_pool *dp, uint64_t txg); | |
97 | ||
98 | /* | |
99 | * Returns TRUE if we are "backed up" waiting for the syncing | |
100 | * transaction to complete; otherwise returns FALSE. | |
101 | */ | |
b128c09f BB |
102 | extern boolean_t txg_stalled(struct dsl_pool *dp); |
103 | ||
104 | /* returns TRUE if someone is waiting for the next txg to sync */ | |
105 | extern boolean_t txg_sync_waiting(struct dsl_pool *dp); | |
34dc7c2f | 106 | |
4747a7d3 MA |
107 | extern void txg_verify(spa_t *spa, uint64_t txg); |
108 | ||
54a179e7 RC |
109 | /* |
110 | * Wait for pending commit callbacks of already-synced transactions to finish | |
111 | * processing. | |
112 | */ | |
113 | extern void txg_wait_callbacks(struct dsl_pool *dp); | |
114 | ||
34dc7c2f BB |
115 | /* |
116 | * Per-txg object lists. | |
117 | */ | |
118 | ||
119 | #define TXG_CLEAN(txg) ((txg) - 1) | |
120 | ||
4747a7d3 | 121 | extern void txg_list_create(txg_list_t *tl, spa_t *spa, size_t offset); |
34dc7c2f | 122 | extern void txg_list_destroy(txg_list_t *tl); |
29809a6c | 123 | extern boolean_t txg_list_empty(txg_list_t *tl, uint64_t txg); |
acbad6ff | 124 | extern boolean_t txg_all_lists_empty(txg_list_t *tl); |
13fe0198 MA |
125 | extern boolean_t txg_list_add(txg_list_t *tl, void *p, uint64_t txg); |
126 | extern boolean_t txg_list_add_tail(txg_list_t *tl, void *p, uint64_t txg); | |
34dc7c2f BB |
127 | extern void *txg_list_remove(txg_list_t *tl, uint64_t txg); |
128 | extern void *txg_list_remove_this(txg_list_t *tl, void *p, uint64_t txg); | |
13fe0198 | 129 | extern boolean_t txg_list_member(txg_list_t *tl, void *p, uint64_t txg); |
34dc7c2f BB |
130 | extern void *txg_list_head(txg_list_t *tl, uint64_t txg); |
131 | extern void *txg_list_next(txg_list_t *tl, void *p, uint64_t txg); | |
132 | ||
87d98efe BB |
133 | /* Global tuning */ |
134 | extern int zfs_txg_timeout; | |
135 | ||
34dc7c2f BB |
136 | #ifdef __cplusplus |
137 | } | |
138 | #endif | |
139 | ||
140 | #endif /* _SYS_TXG_H */ |