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Diffstat (limited to 'include/sys/zil_impl.h')
| -rw-r--r-- | include/sys/zil_impl.h | 147 |
1 files changed, 147 insertions, 0 deletions
diff --git a/include/sys/zil_impl.h b/include/sys/zil_impl.h new file mode 100644 index 000000000..1d4c0cc6c --- /dev/null +++ b/include/sys/zil_impl.h @@ -0,0 +1,147 @@ +/* + * CDDL HEADER START + * + * The contents of this file are subject to the terms of the + * Common Development and Distribution License (the "License"). + * You may not use this file except in compliance with the License. + * + * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE + * or http://www.opensolaris.org/os/licensing. + * See the License for the specific language governing permissions + * and limitations under the License. + * + * When distributing Covered Code, include this CDDL HEADER in each + * file and include the License file at usr/src/OPENSOLARIS.LICENSE. + * If applicable, add the following below this CDDL HEADER, with the + * fields enclosed by brackets "[]" replaced with your own identifying + * information: Portions Copyright [yyyy] [name of copyright owner] + * + * CDDL HEADER END + */ +/* + * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. + */ + +/* Portions Copyright 2010 Robert Milkowski */ + +#ifndef _SYS_ZIL_IMPL_H +#define _SYS_ZIL_IMPL_H + +#include <sys/zil.h> +#include <sys/dmu_objset.h> + +#ifdef __cplusplus +extern "C" { +#endif + +/* + * Log write buffer. + */ +typedef struct lwb { + zilog_t *lwb_zilog; /* back pointer to log struct */ + blkptr_t lwb_blk; /* on disk address of this log blk */ + int lwb_nused; /* # used bytes in buffer */ + int lwb_sz; /* size of block and buffer */ + char *lwb_buf; /* log write buffer */ + zio_t *lwb_zio; /* zio for this buffer */ + dmu_tx_t *lwb_tx; /* tx for log block allocation */ + uint64_t lwb_max_txg; /* highest txg in this lwb */ + list_node_t lwb_node; /* zilog->zl_lwb_list linkage */ +} lwb_t; + +/* + * Intent log transaction lists + */ +typedef struct itxs { + list_t i_sync_list; /* list of synchronous itxs */ + avl_tree_t i_async_tree; /* tree of foids for async itxs */ +} itxs_t; + +typedef struct itxg { + kmutex_t itxg_lock; /* lock for this structure */ + uint64_t itxg_txg; /* txg for this chain */ + uint64_t itxg_sod; /* total size on disk for this txg */ + itxs_t *itxg_itxs; /* sync and async itxs */ +} itxg_t; + +/* for async nodes we build up an AVL tree of lists of async itxs per file */ +typedef struct itx_async_node { + uint64_t ia_foid; /* file object id */ + list_t ia_list; /* list of async itxs for this foid */ + avl_node_t ia_node; /* AVL tree linkage */ +} itx_async_node_t; + +/* + * Vdev flushing: during a zil_commit(), we build up an AVL tree of the vdevs + * we've touched so we know which ones need a write cache flush at the end. + */ +typedef struct zil_vdev_node { + uint64_t zv_vdev; /* vdev to be flushed */ + avl_node_t zv_node; /* AVL tree linkage */ +} zil_vdev_node_t; + +#define ZIL_PREV_BLKS 16 + +/* + * Stable storage intent log management structure. One per dataset. + */ +struct zilog { + kmutex_t zl_lock; /* protects most zilog_t fields */ + struct dsl_pool *zl_dmu_pool; /* DSL pool */ + spa_t *zl_spa; /* handle for read/write log */ + const zil_header_t *zl_header; /* log header buffer */ + objset_t *zl_os; /* object set we're logging */ + zil_get_data_t *zl_get_data; /* callback to get object content */ + zio_t *zl_root_zio; /* log writer root zio */ + uint64_t zl_lr_seq; /* on-disk log record sequence number */ + uint64_t zl_commit_lr_seq; /* last committed on-disk lr seq */ + uint64_t zl_destroy_txg; /* txg of last zil_destroy() */ + uint64_t zl_replayed_seq[TXG_SIZE]; /* last replayed rec seq */ + uint64_t zl_replaying_seq; /* current replay seq number */ + uint32_t zl_suspend; /* log suspend count */ + kcondvar_t zl_cv_writer; /* log writer thread completion */ + kcondvar_t zl_cv_suspend; /* log suspend completion */ + uint8_t zl_suspending; /* log is currently suspending */ + uint8_t zl_keep_first; /* keep first log block in destroy */ + uint8_t zl_replay; /* replaying records while set */ + uint8_t zl_stop_sync; /* for debugging */ + uint8_t zl_writer; /* boolean: write setup in progress */ + uint8_t zl_logbias; /* latency or throughput */ + uint8_t zl_sync; /* synchronous or asynchronous */ + int zl_parse_error; /* last zil_parse() error */ + uint64_t zl_parse_blk_seq; /* highest blk seq on last parse */ + uint64_t zl_parse_lr_seq; /* highest lr seq on last parse */ + uint64_t zl_parse_blk_count; /* number of blocks parsed */ + uint64_t zl_parse_lr_count; /* number of log records parsed */ + uint64_t zl_next_batch; /* next batch number */ + uint64_t zl_com_batch; /* committed batch number */ + kcondvar_t zl_cv_batch[2]; /* batch condition variables */ + itxg_t zl_itxg[TXG_SIZE]; /* intent log txg chains */ + list_t zl_itx_commit_list; /* itx list to be committed */ + uint64_t zl_itx_list_sz; /* total size of records on list */ + uint64_t zl_cur_used; /* current commit log size used */ + list_t zl_lwb_list; /* in-flight log write list */ + kmutex_t zl_vdev_lock; /* protects zl_vdev_tree */ + avl_tree_t zl_vdev_tree; /* vdevs to flush in zil_commit() */ + taskq_t *zl_clean_taskq; /* runs lwb and itx clean tasks */ + avl_tree_t zl_bp_tree; /* track bps during log parse */ + clock_t zl_replay_time; /* lbolt of when replay started */ + uint64_t zl_replay_blks; /* number of log blocks replayed */ + zil_header_t zl_old_header; /* debugging aid */ + uint_t zl_prev_blks[ZIL_PREV_BLKS]; /* size - sector rounded */ + uint_t zl_prev_rotor; /* rotor for zl_prev[] */ +}; + +typedef struct zil_bp_node { + dva_t zn_dva; + avl_node_t zn_node; +} zil_bp_node_t; + +#define ZIL_MAX_LOG_DATA (SPA_MAXBLOCKSIZE - sizeof (zil_chain_t) - \ + sizeof (lr_write_t)) + +#ifdef __cplusplus +} +#endif + +#endif /* _SYS_ZIL_IMPL_H */ |