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 2006 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 "%Z%%M% %I% %E% 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: We use a bit map of size ZIL_VDEV_BMAP bytes. 55 * Any vdev numbers beyond that use a linked list of zil_vdev_t structures. 56 */ 57 58 #define ZIL_VDEV_BMSZ 16 /* 16 * 8 = 128 vdevs */ 59 typedef struct zil_vdev { 60 uint64_t vdev; /* device written */ 61 list_node_t vdev_seq_node; /* zilog->zl_vdev_list linkage */ 62 } zil_vdev_t; 63 64 /* 65 * Stable storage intent log management structure. One per dataset. 66 */ 67 struct zilog { 68 kmutex_t zl_lock; /* protects most zilog_t fields */ 69 struct dsl_pool *zl_dmu_pool; /* DSL pool */ 70 spa_t *zl_spa; /* handle for read/write log */ 71 const zil_header_t *zl_header; /* log header buffer */ 72 objset_t *zl_os; /* object set we're logging */ 73 zil_get_data_t *zl_get_data; /* callback to get object content */ 74 zio_t *zl_root_zio; /* log writer root zio */ 75 uint64_t zl_itx_seq; /* next itx sequence number */ 76 uint64_t zl_commit_seq; /* committed upto this number */ 77 uint64_t zl_lr_seq; /* log record sequence number */ 78 uint64_t zl_destroy_txg; /* txg of last zil_destroy() */ 79 uint64_t zl_replay_seq[TXG_SIZE]; /* seq of last replayed rec */ 80 uint32_t zl_suspend; /* log suspend count */ 81 kcondvar_t zl_cv_writer; /* log writer thread completion */ 82 kcondvar_t zl_cv_suspend; /* log suspend completion */ 83 uint8_t zl_suspending; /* log is currently suspending */ 84 uint8_t zl_keep_first; /* keep first log block in destroy */ 85 uint8_t zl_stop_replay; /* don't replay any further */ 86 uint8_t zl_stop_sync; /* for debugging */ 87 uint8_t zl_writer; /* boolean: write setup in progress */ 88 uint8_t zl_log_error; /* boolean: log write error */ 89 list_t zl_itx_list; /* in-memory itx list */ 90 uint64_t zl_itx_list_sz; /* total size of records on list */ 91 uint64_t zl_cur_used; /* current commit log size used */ 92 uint64_t zl_prev_used; /* previous commit log size used */ 93 list_t zl_lwb_list; /* in-flight log write list */ 94 list_t zl_vdev_list; /* list of [vdev, seq] pairs */ 95 uint8_t zl_vdev_bmap[ZIL_VDEV_BMSZ]; /* bitmap of vdevs */ 96 taskq_t *zl_clean_taskq; /* runs lwb and itx clean tasks */ 97 avl_tree_t zl_dva_tree; /* track DVAs during log parse */ 98 clock_t zl_replay_time; /* lbolt of when replay started */ 99 uint64_t zl_replay_blks; /* number of log blocks replayed */ 100 }; 101 102 typedef struct zil_dva_node { 103 dva_t zn_dva; 104 avl_node_t zn_node; 105 } zil_dva_node_t; 106 107 #ifdef __cplusplus 108 } 109 #endif 110 111 #endif /* _SYS_ZIL_IMPL_H */ 112