151 lines
5.5 KiB
C
151 lines
5.5 KiB
C
/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License (the "License").
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* You may not use this file except in compliance with the License.
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*
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* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
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* or http://www.opensolaris.org/os/licensing.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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* If applicable, add the following below this CDDL HEADER, with the
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* fields enclosed by brackets "[]" replaced with your own identifying
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* information: Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*/
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/*
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* Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
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* Copyright (c) 2012 by Delphix. All rights reserved.
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*/
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/* Portions Copyright 2010 Robert Milkowski */
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#ifndef _SYS_ZIL_IMPL_H
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#define _SYS_ZIL_IMPL_H
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#include <sys/zil.h>
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#include <sys/dmu_objset.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*
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* Log write buffer.
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*/
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typedef struct lwb {
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zilog_t *lwb_zilog; /* back pointer to log struct */
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blkptr_t lwb_blk; /* on disk address of this log blk */
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boolean_t lwb_fastwrite; /* is blk marked for fastwrite? */
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int lwb_nused; /* # used bytes in buffer */
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int lwb_sz; /* size of block and buffer */
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char *lwb_buf; /* log write buffer */
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zio_t *lwb_zio; /* zio for this buffer */
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dmu_tx_t *lwb_tx; /* tx for log block allocation */
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uint64_t lwb_max_txg; /* highest txg in this lwb */
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list_node_t lwb_node; /* zilog->zl_lwb_list linkage */
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} lwb_t;
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/*
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* Intent log transaction lists
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*/
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typedef struct itxs {
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list_t i_sync_list; /* list of synchronous itxs */
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avl_tree_t i_async_tree; /* tree of foids for async itxs */
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} itxs_t;
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typedef struct itxg {
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kmutex_t itxg_lock; /* lock for this structure */
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uint64_t itxg_txg; /* txg for this chain */
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uint64_t itxg_sod; /* total size on disk for this txg */
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itxs_t *itxg_itxs; /* sync and async itxs */
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} itxg_t;
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/* for async nodes we build up an AVL tree of lists of async itxs per file */
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typedef struct itx_async_node {
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uint64_t ia_foid; /* file object id */
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list_t ia_list; /* list of async itxs for this foid */
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avl_node_t ia_node; /* AVL tree linkage */
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} itx_async_node_t;
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/*
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* Vdev flushing: during a zil_commit(), we build up an AVL tree of the vdevs
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* we've touched so we know which ones need a write cache flush at the end.
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*/
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typedef struct zil_vdev_node {
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uint64_t zv_vdev; /* vdev to be flushed */
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avl_node_t zv_node; /* AVL tree linkage */
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} zil_vdev_node_t;
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#define ZIL_PREV_BLKS 16
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/*
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* Stable storage intent log management structure. One per dataset.
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*/
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struct zilog {
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kmutex_t zl_lock; /* protects most zilog_t fields */
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struct dsl_pool *zl_dmu_pool; /* DSL pool */
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spa_t *zl_spa; /* handle for read/write log */
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const zil_header_t *zl_header; /* log header buffer */
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objset_t *zl_os; /* object set we're logging */
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zil_get_data_t *zl_get_data; /* callback to get object content */
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zio_t *zl_root_zio; /* log writer root zio */
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uint64_t zl_lr_seq; /* on-disk log record sequence number */
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uint64_t zl_commit_lr_seq; /* last committed on-disk lr seq */
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uint64_t zl_destroy_txg; /* txg of last zil_destroy() */
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uint64_t zl_replayed_seq[TXG_SIZE]; /* last replayed rec seq */
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uint64_t zl_replaying_seq; /* current replay seq number */
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uint32_t zl_suspend; /* log suspend count */
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kcondvar_t zl_cv_writer; /* log writer thread completion */
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kcondvar_t zl_cv_suspend; /* log suspend completion */
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uint8_t zl_suspending; /* log is currently suspending */
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uint8_t zl_keep_first; /* keep first log block in destroy */
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uint8_t zl_replay; /* replaying records while set */
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uint8_t zl_stop_sync; /* for debugging */
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uint8_t zl_writer; /* boolean: write setup in progress */
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uint8_t zl_logbias; /* latency or throughput */
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uint8_t zl_sync; /* synchronous or asynchronous */
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int zl_parse_error; /* last zil_parse() error */
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uint64_t zl_parse_blk_seq; /* highest blk seq on last parse */
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uint64_t zl_parse_lr_seq; /* highest lr seq on last parse */
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uint64_t zl_parse_blk_count; /* number of blocks parsed */
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uint64_t zl_parse_lr_count; /* number of log records parsed */
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uint64_t zl_next_batch; /* next batch number */
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uint64_t zl_com_batch; /* committed batch number */
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kcondvar_t zl_cv_batch[2]; /* batch condition variables */
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itxg_t zl_itxg[TXG_SIZE]; /* intent log txg chains */
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list_t zl_itx_commit_list; /* itx list to be committed */
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uint64_t zl_itx_list_sz; /* total size of records on list */
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uint64_t zl_cur_used; /* current commit log size used */
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list_t zl_lwb_list; /* in-flight log write list */
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kmutex_t zl_vdev_lock; /* protects zl_vdev_tree */
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avl_tree_t zl_vdev_tree; /* vdevs to flush in zil_commit() */
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taskq_t *zl_clean_taskq; /* runs lwb and itx clean tasks */
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avl_tree_t zl_bp_tree; /* track bps during log parse */
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clock_t zl_replay_time; /* lbolt of when replay started */
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uint64_t zl_replay_blks; /* number of log blocks replayed */
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zil_header_t zl_old_header; /* debugging aid */
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uint_t zl_prev_blks[ZIL_PREV_BLKS]; /* size - sector rounded */
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uint_t zl_prev_rotor; /* rotor for zl_prev[] */
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txg_node_t zl_dirty_link; /* protected by dp_dirty_zilogs list */
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};
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typedef struct zil_bp_node {
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dva_t zn_dva;
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avl_node_t zn_node;
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} zil_bp_node_t;
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#define ZIL_MAX_LOG_DATA (SPA_MAXBLOCKSIZE - sizeof (zil_chain_t) - \
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sizeof (lr_write_t))
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#ifdef __cplusplus
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}
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#endif
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#endif /* _SYS_ZIL_IMPL_H */
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