zil_impl.h revision 67bd71c6cc629bab3aa0d595c624a667f1574254
fa9e4066f08beec538e775443c5be79dd423fcabahrens/*
fa9e4066f08beec538e775443c5be79dd423fcabahrens * CDDL HEADER START
fa9e4066f08beec538e775443c5be79dd423fcabahrens *
fa9e4066f08beec538e775443c5be79dd423fcabahrens * The contents of this file are subject to the terms of the
d80c45e0f58fa434ba37259ea2e2b12e0380c19abonwick * Common Development and Distribution License (the "License").
d80c45e0f58fa434ba37259ea2e2b12e0380c19abonwick * You may not use this file except in compliance with the License.
fa9e4066f08beec538e775443c5be79dd423fcabahrens *
fa9e4066f08beec538e775443c5be79dd423fcabahrens * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
fa9e4066f08beec538e775443c5be79dd423fcabahrens * or http://www.opensolaris.org/os/licensing.
fa9e4066f08beec538e775443c5be79dd423fcabahrens * See the License for the specific language governing permissions
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fa9e4066f08beec538e775443c5be79dd423fcabahrens *
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fa9e4066f08beec538e775443c5be79dd423fcabahrens * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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fa9e4066f08beec538e775443c5be79dd423fcabahrens * CDDL HEADER END
fa9e4066f08beec538e775443c5be79dd423fcabahrens */
fa9e4066f08beec538e775443c5be79dd423fcabahrens/*
d80c45e0f58fa434ba37259ea2e2b12e0380c19abonwick * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
fa9e4066f08beec538e775443c5be79dd423fcabahrens * Use is subject to license terms.
fa9e4066f08beec538e775443c5be79dd423fcabahrens */
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens#ifndef _SYS_ZIL_IMPL_H
fa9e4066f08beec538e775443c5be79dd423fcabahrens#define _SYS_ZIL_IMPL_H
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens#pragma ident "%Z%%M% %I% %E% SMI"
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens#include <sys/zil.h>
fa9e4066f08beec538e775443c5be79dd423fcabahrens#include <sys/dmu_objset.h>
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens#ifdef __cplusplus
fa9e4066f08beec538e775443c5be79dd423fcabahrensextern "C" {
fa9e4066f08beec538e775443c5be79dd423fcabahrens#endif
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens/*
fa9e4066f08beec538e775443c5be79dd423fcabahrens * Log write buffer.
fa9e4066f08beec538e775443c5be79dd423fcabahrens */
fa9e4066f08beec538e775443c5be79dd423fcabahrenstypedef struct lwb {
fa9e4066f08beec538e775443c5be79dd423fcabahrens zilog_t *lwb_zilog; /* back pointer to log struct */
fa9e4066f08beec538e775443c5be79dd423fcabahrens blkptr_t lwb_blk; /* on disk address of this log blk */
fa9e4066f08beec538e775443c5be79dd423fcabahrens int lwb_nused; /* # used bytes in buffer */
fa9e4066f08beec538e775443c5be79dd423fcabahrens int lwb_sz; /* size of block and buffer */
fa9e4066f08beec538e775443c5be79dd423fcabahrens char *lwb_buf; /* log write buffer */
c5c6ffa0498b9c8555798756141b4a3061a138c1maybee zio_t *lwb_zio; /* zio for this buffer */
fa9e4066f08beec538e775443c5be79dd423fcabahrens uint64_t lwb_max_txg; /* highest txg in this lwb */
fa9e4066f08beec538e775443c5be79dd423fcabahrens txg_handle_t lwb_txgh; /* txg handle for txg_exit() */
fa9e4066f08beec538e775443c5be79dd423fcabahrens list_node_t lwb_node; /* zilog->zl_lwb_list linkage */
fa9e4066f08beec538e775443c5be79dd423fcabahrens} lwb_t;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens/*
67bd71c6cc629bab3aa0d595c624a667f1574254perrin * Vdev flushing: We use a bit map of size ZIL_VDEV_BMAP bytes.
67bd71c6cc629bab3aa0d595c624a667f1574254perrin * Any vdev numbers beyond that use a linked list of zil_vdev_t structures.
fa9e4066f08beec538e775443c5be79dd423fcabahrens */
67bd71c6cc629bab3aa0d595c624a667f1574254perrin
67bd71c6cc629bab3aa0d595c624a667f1574254perrin#define ZIL_VDEV_BMSZ 16 /* 16 * 8 = 128 vdevs */
fa9e4066f08beec538e775443c5be79dd423fcabahrenstypedef struct zil_vdev {
fa9e4066f08beec538e775443c5be79dd423fcabahrens uint64_t vdev; /* device written */
fa9e4066f08beec538e775443c5be79dd423fcabahrens list_node_t vdev_seq_node; /* zilog->zl_vdev_list linkage */
fa9e4066f08beec538e775443c5be79dd423fcabahrens} zil_vdev_t;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens/*
fa9e4066f08beec538e775443c5be79dd423fcabahrens * Stable storage intent log management structure. One per dataset.
fa9e4066f08beec538e775443c5be79dd423fcabahrens */
fa9e4066f08beec538e775443c5be79dd423fcabahrensstruct zilog {
fa9e4066f08beec538e775443c5be79dd423fcabahrens kmutex_t zl_lock; /* protects most zilog_t fields */
fa9e4066f08beec538e775443c5be79dd423fcabahrens struct dsl_pool *zl_dmu_pool; /* DSL pool */
fa9e4066f08beec538e775443c5be79dd423fcabahrens spa_t *zl_spa; /* handle for read/write log */
d80c45e0f58fa434ba37259ea2e2b12e0380c19abonwick const zil_header_t *zl_header; /* log header buffer */
fa9e4066f08beec538e775443c5be79dd423fcabahrens objset_t *zl_os; /* object set we're logging */
fa9e4066f08beec538e775443c5be79dd423fcabahrens zil_get_data_t *zl_get_data; /* callback to get object content */
b19a79ec1a527828a60c4d325ccd8dcbeb2b2e8bperrin zio_t *zl_root_zio; /* log writer root zio */
67bd71c6cc629bab3aa0d595c624a667f1574254perrin uint64_t zl_itx_seq; /* next itx sequence number */
67bd71c6cc629bab3aa0d595c624a667f1574254perrin uint64_t zl_commit_seq; /* committed upto this number */
b19a79ec1a527828a60c4d325ccd8dcbeb2b2e8bperrin uint64_t zl_lr_seq; /* log record sequence number */
fa9e4066f08beec538e775443c5be79dd423fcabahrens uint64_t zl_destroy_txg; /* txg of last zil_destroy() */
fa9e4066f08beec538e775443c5be79dd423fcabahrens uint64_t zl_replay_seq[TXG_SIZE]; /* seq of last replayed rec */
fa9e4066f08beec538e775443c5be79dd423fcabahrens uint32_t zl_suspend; /* log suspend count */
b19a79ec1a527828a60c4d325ccd8dcbeb2b2e8bperrin kcondvar_t zl_cv_writer; /* log writer thread completion */
d80c45e0f58fa434ba37259ea2e2b12e0380c19abonwick kcondvar_t zl_cv_suspend; /* log suspend completion */
d80c45e0f58fa434ba37259ea2e2b12e0380c19abonwick uint8_t zl_suspending; /* log is currently suspending */
d80c45e0f58fa434ba37259ea2e2b12e0380c19abonwick uint8_t zl_keep_first; /* keep first log block in destroy */
fa9e4066f08beec538e775443c5be79dd423fcabahrens uint8_t zl_stop_replay; /* don't replay any further */
fa9e4066f08beec538e775443c5be79dd423fcabahrens uint8_t zl_stop_sync; /* for debugging */
fa9e4066f08beec538e775443c5be79dd423fcabahrens uint8_t zl_writer; /* boolean: write setup in progress */
fa9e4066f08beec538e775443c5be79dd423fcabahrens uint8_t zl_log_error; /* boolean: log write error */
fa9e4066f08beec538e775443c5be79dd423fcabahrens list_t zl_itx_list; /* in-memory itx list */
fa9e4066f08beec538e775443c5be79dd423fcabahrens uint64_t zl_itx_list_sz; /* total size of records on list */
22ac5be40819d45ddf9d12dc1db410dbcdaac4abperrin uint64_t zl_cur_used; /* current commit log size used */
22ac5be40819d45ddf9d12dc1db410dbcdaac4abperrin uint64_t zl_prev_used; /* previous commit log size used */
fa9e4066f08beec538e775443c5be79dd423fcabahrens list_t zl_lwb_list; /* in-flight log write list */
fa9e4066f08beec538e775443c5be79dd423fcabahrens list_t zl_vdev_list; /* list of [vdev, seq] pairs */
67bd71c6cc629bab3aa0d595c624a667f1574254perrin uint8_t zl_vdev_bmap[ZIL_VDEV_BMSZ]; /* bitmap of vdevs */
fa9e4066f08beec538e775443c5be79dd423fcabahrens taskq_t *zl_clean_taskq; /* runs lwb and itx clean tasks */
fa9e4066f08beec538e775443c5be79dd423fcabahrens avl_tree_t zl_dva_tree; /* track DVAs during log parse */
67bd71c6cc629bab3aa0d595c624a667f1574254perrin clock_t zl_replay_time; /* lbolt of when replay started */
67bd71c6cc629bab3aa0d595c624a667f1574254perrin uint64_t zl_replay_blks; /* number of log blocks replayed */
fa9e4066f08beec538e775443c5be79dd423fcabahrens};
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrenstypedef struct zil_dva_node {
fa9e4066f08beec538e775443c5be79dd423fcabahrens dva_t zn_dva;
fa9e4066f08beec538e775443c5be79dd423fcabahrens avl_node_t zn_node;
fa9e4066f08beec538e775443c5be79dd423fcabahrens} zil_dva_node_t;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens#ifdef __cplusplus
fa9e4066f08beec538e775443c5be79dd423fcabahrens}
fa9e4066f08beec538e775443c5be79dd423fcabahrens#endif
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens#endif /* _SYS_ZIL_IMPL_H */