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-rw-r--r--uts/common/fs/zfs/sys/zil_impl.h147
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diff --git a/uts/common/fs/zfs/sys/zil_impl.h b/uts/common/fs/zfs/sys/zil_impl.h
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+/*
+ * 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 */