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10 * See the License for the specific language governing permissions
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15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
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22 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
25 /* Portions Copyright 2010 Robert Milkowski */
27 #ifndef _SYS_ZIL_IMPL_H
28 #define _SYS_ZIL_IMPL_H
31 #include <sys/dmu_objset.h>
41 zilog_t *lwb_zilog; /* back pointer to log struct */
42 blkptr_t lwb_blk; /* on disk address of this log blk */
43 int lwb_nused; /* # used bytes in buffer */
44 int lwb_sz; /* size of block and buffer */
45 char *lwb_buf; /* log write buffer */
46 zio_t *lwb_zio; /* zio for this buffer */
47 dmu_tx_t *lwb_tx; /* tx for log block allocation */
48 uint64_t lwb_max_txg; /* highest txg in this lwb */
49 list_node_t lwb_node; /* zilog->zl_lwb_list linkage */
53 * Vdev flushing: during a zil_commit(), we build up an AVL tree of the vdevs
54 * we've touched so we know which ones need a write cache flush at the end.
56 typedef struct zil_vdev_node {
57 uint64_t zv_vdev; /* vdev to be flushed */
58 avl_node_t zv_node; /* AVL tree linkage */
61 #define ZIL_PREV_BLKS 16
64 * Stable storage intent log management structure. One per dataset.
67 kmutex_t zl_lock; /* protects most zilog_t fields */
68 struct dsl_pool *zl_dmu_pool; /* DSL pool */
69 spa_t *zl_spa; /* handle for read/write log */
70 const zil_header_t *zl_header; /* log header buffer */
71 objset_t *zl_os; /* object set we're logging */
72 zil_get_data_t *zl_get_data; /* callback to get object content */
73 zio_t *zl_root_zio; /* log writer root zio */
74 uint64_t zl_itx_seq; /* next in-core itx sequence number */
75 uint64_t zl_lr_seq; /* on-disk log record sequence number */
76 uint64_t zl_commit_seq; /* committed upto this number */
77 uint64_t zl_commit_lr_seq; /* last committed on-disk lr seq */
78 uint64_t zl_destroy_txg; /* txg of last zil_destroy() */
79 uint64_t zl_replayed_seq[TXG_SIZE]; /* last replayed rec seq */
80 uint64_t zl_replaying_seq; /* current replay seq number */
81 uint32_t zl_suspend; /* log suspend count */
82 kcondvar_t zl_cv_writer; /* log writer thread completion */
83 kcondvar_t zl_cv_suspend; /* log suspend completion */
84 uint8_t zl_suspending; /* log is currently suspending */
85 uint8_t zl_keep_first; /* keep first log block in destroy */
86 uint8_t zl_replay; /* replaying records while set */
87 uint8_t zl_stop_sync; /* for debugging */
88 uint8_t zl_writer; /* boolean: write setup in progress */
89 uint8_t zl_logbias; /* latency or throughput */
90 uint8_t zl_sync; /* synchronous or asynchronous */
91 int zl_parse_error; /* last zil_parse() error */
92 uint64_t zl_parse_blk_seq; /* highest blk seq on last parse */
93 uint64_t zl_parse_lr_seq; /* highest lr seq on last parse */
94 uint64_t zl_parse_blk_count; /* number of blocks parsed */
95 uint64_t zl_parse_lr_count; /* number of log records parsed */
96 list_t zl_itx_list; /* in-memory itx list */
97 uint64_t zl_itx_list_sz; /* total size of records on list */
98 uint64_t zl_cur_used; /* current commit log size used */
99 uint64_t zl_prev_used; /* previous commit log size used */
100 list_t zl_lwb_list; /* in-flight log write list */
101 kmutex_t zl_vdev_lock; /* protects zl_vdev_tree */
102 avl_tree_t zl_vdev_tree; /* vdevs to flush in zil_commit() */
103 taskq_t *zl_clean_taskq; /* runs lwb and itx clean tasks */
104 avl_tree_t zl_bp_tree; /* track bps during log parse */
105 clock_t zl_replay_time; /* lbolt of when replay started */
106 uint64_t zl_replay_blks; /* number of log blocks replayed */
107 zil_header_t zl_old_header; /* debugging aid */
108 uint_t zl_prev_blks[ZIL_PREV_BLKS]; /* size - sector rounded */
109 uint_t zl_prev_rotor; /* rotor for zl_prev[] */
112 typedef struct zil_bp_node {
117 #define ZIL_MAX_LOG_DATA (SPA_MAXBLOCKSIZE - sizeof (zil_chain_t) - \
124 #endif /* _SYS_ZIL_IMPL_H */