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NEX-6859 TX-commit callback that is registered in sync-ctx causes system panic
Reviewed by: Sanjay Nadkarni <sanjay.nadkarni@nexenta.com>
Reviewed by: Saso Kiselkov <saso.kiselkov@nexenta.com>
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--- old/usr/src/uts/common/fs/zfs/sys/txg.h
+++ new/usr/src/uts/common/fs/zfs/sys/txg.h
1 1 /*
2 2 * CDDL HEADER START
3 3 *
4 4 * The contents of this file are subject to the terms of the
5 5 * Common Development and Distribution License (the "License").
6 6 * You may not use this file except in compliance with the License.
7 7 *
8 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 9 * or http://www.opensolaris.org/os/licensing.
10 10 * See the License for the specific language governing permissions
11 11 * and limitations under the License.
12 12 *
13 13 * When distributing Covered Code, include this CDDL HEADER in each
14 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 15 * If applicable, add the following below this CDDL HEADER, with the
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16 16 * fields enclosed by brackets "[]" replaced with your own identifying
17 17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 18 *
19 19 * CDDL HEADER END
20 20 */
21 21 /*
22 22 * Copyright 2010 Sun Microsystems, Inc. All rights reserved.
23 23 * Use is subject to license terms.
24 24 */
25 25 /*
26 + * Copyright 2016 Nexenta Systems, Inc. All rights reserved.
26 27 * Copyright (c) 2012, 2017 by Delphix. All rights reserved.
27 28 */
28 29
29 30 #ifndef _SYS_TXG_H
30 31 #define _SYS_TXG_H
31 32
32 33 #include <sys/spa.h>
33 34 #include <sys/zfs_context.h>
34 35
35 36 #ifdef __cplusplus
36 37 extern "C" {
37 38 #endif
38 39
39 40 #define TXG_CONCURRENT_STATES 3 /* open, quiescing, syncing */
40 41 #define TXG_SIZE 4 /* next power of 2 */
41 42 #define TXG_MASK (TXG_SIZE - 1) /* mask for size */
42 43 #define TXG_INITIAL TXG_SIZE /* initial txg */
43 44 #define TXG_IDX (txg & TXG_MASK)
44 45
45 46 /* Number of txgs worth of frees we defer adding to in-core spacemaps */
46 47 #define TXG_DEFER_SIZE 2
47 48
48 49 typedef struct tx_cpu tx_cpu_t;
49 50
50 51 typedef struct txg_handle {
51 52 tx_cpu_t *th_cpu;
52 53 uint64_t th_txg;
53 54 } txg_handle_t;
54 55
55 56 typedef struct txg_node {
56 57 struct txg_node *tn_next[TXG_SIZE];
57 58 uint8_t tn_member[TXG_SIZE];
58 59 } txg_node_t;
59 60
60 61 typedef struct txg_list {
61 62 kmutex_t tl_lock;
62 63 size_t tl_offset;
63 64 spa_t *tl_spa;
64 65 txg_node_t *tl_head[TXG_SIZE];
65 66 } txg_list_t;
66 67
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67 68 struct dsl_pool;
68 69
69 70 extern void txg_init(struct dsl_pool *dp, uint64_t txg);
70 71 extern void txg_fini(struct dsl_pool *dp);
71 72 extern void txg_sync_start(struct dsl_pool *dp);
72 73 extern void txg_sync_stop(struct dsl_pool *dp);
73 74 extern uint64_t txg_hold_open(struct dsl_pool *dp, txg_handle_t *txghp);
74 75 extern void txg_rele_to_quiesce(txg_handle_t *txghp);
75 76 extern void txg_rele_to_sync(txg_handle_t *txghp);
76 77 extern void txg_register_callbacks(txg_handle_t *txghp, list_t *tx_callbacks);
78 +extern void txg_register_callbacks_sync(struct dsl_pool *dp,
79 + uint64_t txg, list_t *tx_callbacks);
77 80
78 81 extern void txg_delay(struct dsl_pool *dp, uint64_t txg, hrtime_t delta,
79 82 hrtime_t resolution);
80 83 extern void txg_kick(struct dsl_pool *dp);
81 84
82 85 /*
83 86 * Wait until the given transaction group has finished syncing.
84 87 * Try to make this happen as soon as possible (eg. kick off any
85 88 * necessary syncs immediately). If txg==0, wait for the currently open
86 89 * txg to finish syncing.
87 90 */
88 91 extern void txg_wait_synced(struct dsl_pool *dp, uint64_t txg);
89 92
90 93 /*
91 94 * Wait until the given transaction group, or one after it, is
92 95 * the open transaction group. Try to make this happen as soon
93 96 * as possible (eg. kick off any necessary syncs immediately).
94 97 * If txg == 0, wait for the next open txg.
95 98 */
96 99 extern void txg_wait_open(struct dsl_pool *dp, uint64_t txg);
97 100
98 101 /*
99 102 * Returns TRUE if we are "backed up" waiting for the syncing
100 103 * transaction to complete; otherwise returns FALSE.
101 104 */
102 105 extern boolean_t txg_stalled(struct dsl_pool *dp);
103 106
104 107 /* returns TRUE if someone is waiting for the next txg to sync */
105 108 extern boolean_t txg_sync_waiting(struct dsl_pool *dp);
106 109
107 110 extern void txg_verify(spa_t *spa, uint64_t txg);
108 111
109 112 /*
110 113 * Per-txg object lists.
111 114 */
112 115
113 116 #define TXG_CLEAN(txg) ((txg) - 1)
114 117
115 118 extern void txg_list_create(txg_list_t *tl, spa_t *spa, size_t offset);
116 119 extern void txg_list_destroy(txg_list_t *tl);
117 120 extern boolean_t txg_list_empty(txg_list_t *tl, uint64_t txg);
118 121 extern boolean_t txg_all_lists_empty(txg_list_t *tl);
119 122 extern boolean_t txg_list_add(txg_list_t *tl, void *p, uint64_t txg);
120 123 extern boolean_t txg_list_add_tail(txg_list_t *tl, void *p, uint64_t txg);
121 124 extern void *txg_list_remove(txg_list_t *tl, uint64_t txg);
122 125 extern void *txg_list_remove_this(txg_list_t *tl, void *p, uint64_t txg);
123 126 extern boolean_t txg_list_member(txg_list_t *tl, void *p, uint64_t txg);
124 127 extern void *txg_list_head(txg_list_t *tl, uint64_t txg);
125 128 extern void *txg_list_next(txg_list_t *tl, void *p, uint64_t txg);
126 129
127 130 #ifdef __cplusplus
128 131 }
129 132 #endif
130 133
131 134 #endif /* _SYS_TXG_H */
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