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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 | */ | |
21 | /* | |
22 | * Copyright 2007 Sun Microsystems, Inc. All rights reserved. | |
23 | * Use is subject to license terms. | |
24 | */ | |
25 | ||
26 | #ifndef _SYS_ZIL_IMPL_H | |
27 | #define _SYS_ZIL_IMPL_H | |
28 | ||
29 | #pragma ident "@(#)zil_impl.h 1.7 07/12/12 SMI" | |
30 | ||
31 | #include <sys/zil.h> | |
32 | #include <sys/dmu_objset.h> | |
33 | ||
34 | #ifdef __cplusplus | |
35 | extern "C" { | |
36 | #endif | |
37 | ||
38 | /* | |
39 | * Log write buffer. | |
40 | */ | |
41 | typedef struct lwb { | |
42 | zilog_t *lwb_zilog; /* back pointer to log struct */ | |
43 | blkptr_t lwb_blk; /* on disk address of this log blk */ | |
44 | int lwb_nused; /* # used bytes in buffer */ | |
45 | int lwb_sz; /* size of block and buffer */ | |
46 | char *lwb_buf; /* log write buffer */ | |
47 | zio_t *lwb_zio; /* zio for this buffer */ | |
48 | uint64_t lwb_max_txg; /* highest txg in this lwb */ | |
49 | txg_handle_t lwb_txgh; /* txg handle for txg_exit() */ | |
50 | list_node_t lwb_node; /* zilog->zl_lwb_list linkage */ | |
51 | } lwb_t; | |
52 | ||
53 | /* | |
54 | * Vdev flushing: during a zil_commit(), we build up an AVL tree of the vdevs | |
55 | * we've touched so we know which ones need a write cache flush at the end. | |
56 | */ | |
57 | typedef struct zil_vdev_node { | |
58 | uint64_t zv_vdev; /* vdev to be flushed */ | |
59 | avl_node_t zv_node; /* AVL tree linkage */ | |
60 | } zil_vdev_node_t; | |
61 | ||
62 | /* | |
63 | * Stable storage intent log management structure. One per dataset. | |
64 | */ | |
65 | struct zilog { | |
66 | kmutex_t zl_lock; /* protects most zilog_t fields */ | |
67 | struct dsl_pool *zl_dmu_pool; /* DSL pool */ | |
68 | spa_t *zl_spa; /* handle for read/write log */ | |
69 | const zil_header_t *zl_header; /* log header buffer */ | |
70 | objset_t *zl_os; /* object set we're logging */ | |
71 | zil_get_data_t *zl_get_data; /* callback to get object content */ | |
72 | zio_t *zl_root_zio; /* log writer root zio */ | |
73 | uint64_t zl_itx_seq; /* next itx sequence number */ | |
74 | uint64_t zl_commit_seq; /* committed upto this number */ | |
75 | uint64_t zl_lr_seq; /* log record sequence number */ | |
76 | uint64_t zl_destroy_txg; /* txg of last zil_destroy() */ | |
77 | uint64_t zl_replay_seq[TXG_SIZE]; /* seq of last replayed rec */ | |
78 | uint32_t zl_suspend; /* log suspend count */ | |
79 | kcondvar_t zl_cv_writer; /* log writer thread completion */ | |
80 | kcondvar_t zl_cv_suspend; /* log suspend completion */ | |
81 | uint8_t zl_suspending; /* log is currently suspending */ | |
82 | uint8_t zl_keep_first; /* keep first log block in destroy */ | |
83 | uint8_t zl_stop_replay; /* don't replay any further */ | |
84 | uint8_t zl_stop_sync; /* for debugging */ | |
85 | uint8_t zl_writer; /* boolean: write setup in progress */ | |
86 | uint8_t zl_log_error; /* boolean: log write error */ | |
87 | list_t zl_itx_list; /* in-memory itx list */ | |
88 | uint64_t zl_itx_list_sz; /* total size of records on list */ | |
89 | uint64_t zl_cur_used; /* current commit log size used */ | |
90 | uint64_t zl_prev_used; /* previous commit log size used */ | |
91 | list_t zl_lwb_list; /* in-flight log write list */ | |
92 | kmutex_t zl_vdev_lock; /* protects zl_vdev_tree */ | |
93 | avl_tree_t zl_vdev_tree; /* vdevs to flush in zil_commit() */ | |
94 | taskq_t *zl_clean_taskq; /* runs lwb and itx clean tasks */ | |
95 | avl_tree_t zl_dva_tree; /* track DVAs during log parse */ | |
96 | clock_t zl_replay_time; /* lbolt of when replay started */ | |
97 | uint64_t zl_replay_blks; /* number of log blocks replayed */ | |
98 | }; | |
99 | ||
100 | typedef struct zil_dva_node { | |
101 | dva_t zn_dva; | |
102 | avl_node_t zn_node; | |
103 | } zil_dva_node_t; | |
104 | ||
105 | #ifdef __cplusplus | |
106 | } | |
107 | #endif | |
108 | ||
109 | #endif /* _SYS_ZIL_IMPL_H */ |