spa_impl.h revision abe1fd01ce5a83718c5a840daeab4abdaec1c104
2fa9e406ahrens * CDDL HEADER START
3fa9e406ahrens *
4fa9e406ahrens * The contents of this file are subject to the terms of the
5ea8dc4beschrock * Common Development and Distribution License (the "License").
6ea8dc4beschrock * You may not use this file except in compliance with the License.
7fa9e406ahrens *
8fa9e406ahrens * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9fa9e406ahrens * or
10fa9e406ahrens * See the License for the specific language governing permissions
11fa9e406ahrens * and limitations under the License.
12fa9e406ahrens *
13fa9e406ahrens * When distributing Covered Code, include this CDDL HEADER in each
14fa9e406ahrens * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15fa9e406ahrens * If applicable, add the following below this CDDL HEADER, with the
16fa9e406ahrens * fields enclosed by brackets "[]" replaced with your own identifying
17fa9e406ahrens * information: Portions Copyright [yyyy] [name of copyright owner]
18fa9e406ahrens *
19fa9e406ahrens * CDDL HEADER END
20fa9e406ahrens */
223f9d6adLin Ling * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
235cabbc6Prashanth Sreenivasa * Copyright (c) 2011, 2018 by Delphix. All rights reserved.
24e9103aaGarrett D'Amore * Copyright 2011 Nexenta Systems, Inc.  All rights reserved.
25bc9014eJustin Gibbs * Copyright (c) 2014 Spectra Logic Corporation, All rights reserved.
2645818eeMatthew Ahrens * Copyright 2013 Saso Kiselkov. All rights reserved.
271702cceAlek Pinchuk * Copyright (c) 2017 Datto Inc.
28fa9e406ahrens */
30fa9e406ahrens#ifndef _SYS_SPA_IMPL_H
31fa9e406ahrens#define	_SYS_SPA_IMPL_H
33fa9e406ahrens#include <sys/spa.h>
348671400Serapheim Dimitropoulos#include <sys/spa_checkpoint.h>
35fa9e406ahrens#include <sys/vdev.h>
365cabbc6Prashanth Sreenivasa#include <sys/vdev_removal.h>
37fa9e406ahrens#include <sys/metaslab.h>
38fa9e406ahrens#include <sys/dmu.h>
39fa9e406ahrens#include <sys/dsl_pool.h>
40fa9e406ahrens#include <sys/uberblock_impl.h>
41fa9e406ahrens#include <sys/zfs_context.h>
42fa9e406ahrens#include <sys/avl.h>
43fa9e406ahrens#include <sys/refcount.h>
44fa9e406ahrens#include <sys/bplist.h>
45cde58dbMatthew Ahrens#include <sys/bpobj.h>
465d7b4d4Matthew Ahrens#include <sys/zfeature.h>
47667ec66Serapheim Dimitropoulos#include <sys/zthr.h>
4843466aaMax Grossman#include <zfeature_common.h>
50fa9e406ahrens#ifdef	__cplusplus
51fa9e406ahrensextern "C" {
54ea8dc4beschrocktypedef struct spa_error_entry {
557802d7bMatthew Ahrens	zbookmark_phys_t	se_bookmark;
567802d7bMatthew Ahrens	char			*se_name;
577802d7bMatthew Ahrens	avl_node_t		se_avl;
58ea8dc4beschrock} spa_error_entry_t;
6006eeb2aektypedef struct spa_history_phys {
6106eeb2aek	uint64_t sh_pool_create_len;	/* ending offset of zpool create */
6206eeb2aek	uint64_t sh_phys_max_off;	/* physical EOF */
6306eeb2aek	uint64_t sh_bof;		/* logical BOF */
6406eeb2aek	uint64_t sh_eof;		/* logical EOF */
6506eeb2aek	uint64_t sh_records_lost;	/* num of records overwritten */
6606eeb2aek} spa_history_phys_t;
685cabbc6Prashanth Sreenivasa/*
695cabbc6Prashanth Sreenivasa * All members must be uint64_t, for byteswap purposes.
705cabbc6Prashanth Sreenivasa */
715cabbc6Prashanth Sreenivasatypedef struct spa_removing_phys {
725cabbc6Prashanth Sreenivasa	uint64_t sr_state; /* dsl_scan_state_t */
735cabbc6Prashanth Sreenivasa
745cabbc6Prashanth Sreenivasa	/*
755cabbc6Prashanth Sreenivasa	 * The vdev ID that we most recently attempted to remove,
765cabbc6Prashanth Sreenivasa	 * or -1 if no removal has been attempted.
775cabbc6Prashanth Sreenivasa	 */
785cabbc6Prashanth Sreenivasa	uint64_t sr_removing_vdev;
795cabbc6Prashanth Sreenivasa
805cabbc6Prashanth Sreenivasa	/*
815cabbc6Prashanth Sreenivasa	 * The vdev ID that we most recently successfully removed,
825cabbc6Prashanth Sreenivasa	 * or -1 if no devices have been removed.
835cabbc6Prashanth Sreenivasa	 */
845cabbc6Prashanth Sreenivasa	uint64_t sr_prev_indirect_vdev;
855cabbc6Prashanth Sreenivasa
865cabbc6Prashanth Sreenivasa	uint64_t sr_start_time;
875cabbc6Prashanth Sreenivasa	uint64_t sr_end_time;
885cabbc6Prashanth Sreenivasa
895cabbc6Prashanth Sreenivasa	/*
905cabbc6Prashanth Sreenivasa	 * Note that we can not use the space map's or indirect mapping's
915cabbc6Prashanth Sreenivasa	 * accounting as a substitute for these values, because we need to
925cabbc6Prashanth Sreenivasa	 * count frees of not-yet-copied data as though it did the copy.
935cabbc6Prashanth Sreenivasa	 * Otherwise, we could get into a situation where copied > to_copy,
945cabbc6Prashanth Sreenivasa	 * or we complete before copied == to_copy.
955cabbc6Prashanth Sreenivasa	 */
965cabbc6Prashanth Sreenivasa	uint64_t sr_to_copy; /* bytes that need to be copied */
975cabbc6Prashanth Sreenivasa	uint64_t sr_copied; /* bytes that have been copied or freed */
985cabbc6Prashanth Sreenivasa} spa_removing_phys_t;
995cabbc6Prashanth Sreenivasa
1005cabbc6Prashanth Sreenivasa/*
1015cabbc6Prashanth Sreenivasa * This struct is stored as an entry in the DMU_POOL_DIRECTORY_OBJECT
1025cabbc6Prashanth Sreenivasa * (with key DMU_POOL_CONDENSING_INDIRECT).  It is present if a condense
1035cabbc6Prashanth Sreenivasa * of an indirect vdev's mapping object is in progress.
1045cabbc6Prashanth Sreenivasa */
1055cabbc6Prashanth Sreenivasatypedef struct spa_condensing_indirect_phys {
1065cabbc6Prashanth Sreenivasa	/*
1075cabbc6Prashanth Sreenivasa	 * The vdev ID of the indirect vdev whose indirect mapping is
1085cabbc6Prashanth Sreenivasa	 * being condensed.
1095cabbc6Prashanth Sreenivasa	 */
1105cabbc6Prashanth Sreenivasa	uint64_t	scip_vdev;
1115cabbc6Prashanth Sreenivasa
1125cabbc6Prashanth Sreenivasa	/*
1135cabbc6Prashanth Sreenivasa	 * The vdev's old obsolete spacemap.  This spacemap's contents are
1145cabbc6Prashanth Sreenivasa	 * being integrated into the new mapping.
1155cabbc6Prashanth Sreenivasa	 */
1165cabbc6Prashanth Sreenivasa	uint64_t	scip_prev_obsolete_sm_object;
1175cabbc6Prashanth Sreenivasa
1185cabbc6Prashanth Sreenivasa	/*
1195cabbc6Prashanth Sreenivasa	 * The new mapping object that is being created.
1205cabbc6Prashanth Sreenivasa	 */
1215cabbc6Prashanth Sreenivasa	uint64_t	scip_next_mapping_object;
1225cabbc6Prashanth Sreenivasa} spa_condensing_indirect_phys_t;
1235cabbc6Prashanth Sreenivasa
124fa94a07brendanstruct spa_aux_vdev {
125fa94a07brendan	uint64_t	sav_object;		/* MOS object for device list */
126fa94a07brendan	nvlist_t	*sav_config;		/* cached device config */
127fa94a07brendan	vdev_t		**sav_vdevs;		/* devices */
128fa94a07brendan	int		sav_count;		/* number devices */
129fa94a07brendan	boolean_t	sav_sync;		/* sync the device list */
130fa94a07brendan	nvlist_t	**sav_pending;		/* pending device additions */
131fa94a07brendan	uint_t		sav_npending;		/* # pending devices */
134e05725bbonwicktypedef struct spa_config_lock {
135e05725bbonwick	kmutex_t	scl_lock;
136e05725bbonwick	kthread_t	*scl_writer;
137e14bb32Jeff Bonwick	int		scl_write_wanted;
138e05725bbonwick	kcondvar_t	scl_cv;
139e05725bbonwick	refcount_t	scl_count;
140e05725bbonwick} spa_config_lock_t;
142c5904d1eschrocktypedef struct spa_config_dirent {
143c5904d1eschrock	list_node_t	scd_link;
144c5904d1eschrock	char		*scd_path;
145c5904d1eschrock} spa_config_dirent_t;
147ec94d32Adam Leventhaltypedef enum zio_taskq_type {
148e14bb32Jeff Bonwick	ZIO_TASKQ_ISSUE = 0,
14980eb36fGeorge Wilson	ZIO_TASKQ_ISSUE_HIGH,
150e14bb32Jeff Bonwick	ZIO_TASKQ_INTERRUPT,
15180eb36fGeorge Wilson	ZIO_TASKQ_INTERRUPT_HIGH,
152e14bb32Jeff Bonwick	ZIO_TASKQ_TYPES
153ec94d32Adam Leventhal} zio_taskq_type_t;
154e14bb32Jeff Bonwick
15535a5a35Jonathan Adams/*
156ec94d32Adam Leventhal * State machine for the zpool-poolname process.  The states transitions
15735a5a35Jonathan Adams * are done as follows:
15835a5a35Jonathan Adams *
15935a5a35Jonathan Adams *	From		   To			Routine
16035a5a35Jonathan Adams *	PROC_NONE	-> PROC_CREATED		spa_activate()
16135a5a35Jonathan Adams *	PROC_CREATED	-> PROC_ACTIVE		spa_thread()
16235a5a35Jonathan Adams *	PROC_ACTIVE	-> PROC_DEACTIVATE	spa_deactivate()
16335a5a35Jonathan Adams *	PROC_DEACTIVATE	-> PROC_GONE		spa_thread()
16435a5a35Jonathan Adams *	PROC_GONE	-> PROC_NONE		spa_deactivate()
16535a5a35Jonathan Adams */
16635a5a35Jonathan Adamstypedef enum spa_proc_state {
16735a5a35Jonathan Adams	SPA_PROC_NONE,		/* spa_proc = &p0, no process created */
16835a5a35Jonathan Adams	SPA_PROC_CREATED,	/* spa_activate() has proc, is waiting */
16935a5a35Jonathan Adams	SPA_PROC_ACTIVE,	/* taskqs created, spa_proc set */
17035a5a35Jonathan Adams	SPA_PROC_DEACTIVATE,	/* spa_deactivate() requests process exit */
17135a5a35Jonathan Adams	SPA_PROC_GONE		/* spa_thread() is exiting, spa_proc = &p0 */
17235a5a35Jonathan Adams} spa_proc_state_t;
17335a5a35Jonathan Adams
174ec94d32Adam Leventhaltypedef struct spa_taskqs {
175ec94d32Adam Leventhal	uint_t stqs_count;
176ec94d32Adam Leventhal	taskq_t **stqs_taskq;
177ec94d32Adam Leventhal} spa_taskqs_t;
178ec94d32Adam Leventhal
179215198aJoe Steintypedef enum spa_all_vdev_zap_action {
180215198aJoe Stein	AVZ_ACTION_NONE = 0,
181215198aJoe Stein	AVZ_ACTION_DESTROY,	/* Destroy all per-vdev ZAPs and the AVZ. */
182555da51Paul Dagnelie	AVZ_ACTION_REBUILD,	/* Populate the new AVZ, see spa_avz_rebuild */
183555da51Paul Dagnelie	AVZ_ACTION_INITIALIZE
184215198aJoe Stein} spa_avz_action_t;
185215198aJoe Stein
1866f79381Pavel Zakharovtypedef enum spa_config_source {
1876f79381Pavel Zakharov	SPA_CONFIG_SRC_NONE = 0,
1886f79381Pavel Zakharov	SPA_CONFIG_SRC_SCAN,		/* scan of path (default: /dev/dsk) */
1896f79381Pavel Zakharov	SPA_CONFIG_SRC_CACHEFILE,	/* any cachefile */
1906f79381Pavel Zakharov	SPA_CONFIG_SRC_TRYIMPORT,	/* returned from call to tryimport */
1916f79381Pavel Zakharov	SPA_CONFIG_SRC_SPLIT,		/* new pool in a pool split */
1926f79381Pavel Zakharov	SPA_CONFIG_SRC_MOS		/* MOS, but not always from right txg */
1936f79381Pavel Zakharov} spa_config_source_t;
1946f79381Pavel Zakharov
195fa9e406ahrensstruct spa {
196fa9e406ahrens	/*
197fa9e406ahrens	 * Fields protected by spa_namespace_lock.
198fa9e406ahrens	 */
1999adfa60Matthew Ahrens	char		spa_name[ZFS_MAX_DATASET_NAME_LEN];	/* pool name */
2008704186Dan McDonald	char		*spa_comment;		/* comment */
2010373e76bonwick	avl_node_t	spa_avl;		/* node in spa_namespace_avl */
2020373e76bonwick	nvlist_t	*spa_config;		/* last synced config */
2030373e76bonwick	nvlist_t	*spa_config_syncing;	/* currently syncing config */
2041195e68Mark J Musante	nvlist_t	*spa_config_splitting;	/* config for splitting */
2054b964adGeorge Wilson	nvlist_t	*spa_load_info;		/* info and errors from load */
206fa9e406ahrens	uint64_t	spa_config_txg;		/* txg of last config change */
207fa9e406ahrens	int		spa_sync_pass;		/* iterate-to-convergence */
20888b7b0fMatthew Ahrens	pool_state_t	spa_state;		/* pool state */
209ea8dc4beschrock	int		spa_inject_ref;		/* injection references */
210ea8dc4beschrock	uint8_t		spa_sync_on;		/* sync threads are running */
211ea8dc4beschrock	spa_load_state_t spa_load_state;	/* current load operation */
2125cabbc6Prashanth Sreenivasa	boolean_t	spa_indirect_vdevs_loaded; /* mappings loaded? */
2136f79381Pavel Zakharov	boolean_t	spa_trust_config;	/* do we trust vdev tree? */
2146f79381Pavel Zakharov	spa_config_source_t spa_config_source;	/* where config comes from? */
2154b964adGeorge Wilson	uint64_t	spa_import_flags;	/* import specific flags */
216ec94d32Adam Leventhal	spa_taskqs_t	spa_zio_taskq[ZIO_TYPES][ZIO_TASKQ_TYPES];
217fa9e406ahrens	dsl_pool_t	*spa_dsl_pool;
218ad135b5Christopher Siden	boolean_t	spa_is_initializing;	/* true while opening pool */
219fa9e406ahrens	metaslab_class_t *spa_normal_class;	/* normal data class */
2208654d02perrin	metaslab_class_t *spa_log_class;	/* intent log data class */
221fa9e406ahrens	uint64_t	spa_first_txg;		/* first txg after spa_open() */
2220373e76bonwick	uint64_t	spa_final_txg;		/* txg of export/destroy */
223fa9e406ahrens	uint64_t	spa_freeze_txg;		/* freeze pool at this txg */
224468c413Tim Haley	uint64_t	spa_load_max_txg;	/* best initial ub_txg */
225b24ab67Jeff Bonwick	uint64_t	spa_claim_max_txg;	/* highest claimed birth txg */
22611027bcTim Haley	timespec_t	spa_loaded_ts;		/* 1st successful open time */
227fa9e406ahrens	objset_t	*spa_meta_objset;	/* copy of dp->dp_meta_objset */
228bc9014eJustin Gibbs	kmutex_t	spa_evicting_os_lock;	/* Evicting objset list lock */
229bc9014eJustin Gibbs	list_t		spa_evicting_os_list;	/* Objsets being evicted. */
230bc9014eJustin Gibbs	kcondvar_t	spa_evicting_os_cv;	/* Objset Eviction Completion */
231fa9e406ahrens	txg_list_t	spa_vdev_txg_list;	/* per-txg dirty vdev list */
232fa9e406ahrens	vdev_t		*spa_root_vdev;		/* top-level vdev container */
23381cd5c5Matthew Ahrens	int		spa_min_ashift;		/* of vdevs in normal class */
23481cd5c5Matthew Ahrens	int		spa_max_ashift;		/* of vdevs in normal class */
235e9103aaGarrett D'Amore	uint64_t	spa_config_guid;	/* config pool guid */
236e9103aaGarrett D'Amore	uint64_t	spa_load_guid;		/* spa_load initialized guid */
237dfbb943George Wilson	uint64_t	spa_last_synced_guid;	/* last synced guid */
238e14bb32Jeff Bonwick	list_t		spa_config_dirty_list;	/* vdevs with dirty config */
239e14bb32Jeff Bonwick	list_t		spa_state_dirty_list;	/* vdevs with dirty state */
240f78cdc3Paul Dagnelie	/*
241f78cdc3Paul Dagnelie	 * spa_alloc_locks and spa_alloc_trees are arrays, whose lengths are
242f78cdc3Paul Dagnelie	 * stored in spa_alloc_count. There is one tree and one lock for each
243f78cdc3Paul Dagnelie	 * allocator, to help improve allocation performance in write-heavy
244f78cdc3Paul Dagnelie	 * workloads.
245f78cdc3Paul Dagnelie	 */
246f78cdc3Paul Dagnelie	kmutex_t	*spa_alloc_locks;
247f78cdc3Paul Dagnelie	avl_tree_t	*spa_alloc_trees;
248f78cdc3Paul Dagnelie	int		spa_alloc_count;
249f78cdc3Paul Dagnelie
250fa94a07brendan	spa_aux_vdev_t	spa_spares;		/* hot spares */
251fa94a07brendan	spa_aux_vdev_t	spa_l2cache;		/* L2ARC cache devices */
252ad135b5Christopher Siden	nvlist_t	*spa_label_features;	/* Features for reading MOS */
253fa9e406ahrens	uint64_t	spa_config_object;	/* MOS object for pool config */
2548f18d1fGeorge Wilson	uint64_t	spa_config_generation;	/* config generation number */
255fa9e406ahrens	uint64_t	spa_syncing_txg;	/* txg currently syncing */
256cde58dbMatthew Ahrens	bpobj_t		spa_deferred_bpobj;	/* deferred-free bplist */
257b24ab67Jeff Bonwick	bplist_t	spa_free_bplist[TXG_SIZE]; /* bplist of stuff to free */
25845818eeMatthew Ahrens	zio_cksum_salt_t spa_cksum_salt;	/* secret salt for cksum */
25945818eeMatthew Ahrens	/* checksum context templates */
26045818eeMatthew Ahrens	kmutex_t	spa_cksum_tmpls_lock;
26145818eeMatthew Ahrens	void		*spa_cksum_tmpls[ZIO_CHECKSUM_FUNCTIONS];
262fa9e406ahrens	uberblock_t	spa_ubsync;		/* last synced uberblock */
263fa9e406ahrens	uberblock_t	spa_uberblock;		/* current uberblock */
264468c413Tim Haley	boolean_t	spa_extreme_rewind;	/* rewind past deferred frees */
26544ecc53George Wilson	uint64_t	spa_last_io;		/* lbolt of last non-scan I/O */
266fa9e406ahrens	kmutex_t	spa_scrub_lock;		/* resilver/scrub lock */
267fa9e406ahrens	uint64_t	spa_scrub_inflight;	/* in-flight scrub I/Os */
268fa9e406ahrens	kcondvar_t	spa_scrub_io_cv;	/* scrub I/O completion */
269fa9e406ahrens	uint8_t		spa_scrub_active;	/* active or suspended? */
270fa9e406ahrens	uint8_t		spa_scrub_type;		/* type of scrub we're doing */
2710373e76bonwick	uint8_t		spa_scrub_finished;	/* indicator to rotate logs */
272088f389ahrens	uint8_t		spa_scrub_started;	/* started since last boot */
273088f389ahrens	uint8_t		spa_scrub_reopen;	/* scrub doing vdev_reopen */
2743f9d6adLin Ling	uint64_t	spa_scan_pass_start;	/* start time per pass/reboot */
2751702cceAlek Pinchuk	uint64_t	spa_scan_pass_scrub_pause; /* scrub pause time */
2761702cceAlek Pinchuk	uint64_t	spa_scan_pass_scrub_spent_paused; /* total paused */
2773f9d6adLin Ling	uint64_t	spa_scan_pass_exam;	/* examined bytes per pass */
278ea8dc4beschrock	kmutex_t	spa_async_lock;		/* protect async state */
279ea8dc4beschrock	kthread_t	*spa_async_thread;	/* thread doing async task */
280ea8dc4beschrock	int		spa_async_suspended;	/* async tasks suspended */
281ea8dc4beschrock	kcondvar_t	spa_async_cv;		/* wait for thread_exit() */
282ea8dc4beschrock	uint16_t	spa_async_tasks;	/* async task mask */
2836f79381Pavel Zakharov	uint64_t	spa_missing_tvds;	/* unopenable tvds on load */
2846f79381Pavel Zakharov	uint64_t	spa_missing_tvds_allowed; /* allow loading spa? */
2855cabbc6Prashanth Sreenivasa
2865cabbc6Prashanth Sreenivasa	spa_removing_phys_t spa_removing_phys;
2875cabbc6Prashanth Sreenivasa	spa_vdev_removal_t *spa_vdev_removal;
2885cabbc6Prashanth Sreenivasa
2895cabbc6Prashanth Sreenivasa	spa_condensing_indirect_phys_t	spa_condensing_indirect_phys;
2905cabbc6Prashanth Sreenivasa	spa_condensing_indirect_t	*spa_condensing_indirect;
291667ec66Serapheim Dimitropoulos	zthr_t		*spa_condense_zthr;	/* zthr doing condense. */
2925cabbc6Prashanth Sreenivasa
2938671400Serapheim Dimitropoulos	uint64_t	spa_checkpoint_txg;	/* the txg of the checkpoint */
2948671400Serapheim Dimitropoulos	spa_checkpoint_info_t spa_checkpoint_info; /* checkpoint accounting */
2958671400Serapheim Dimitropoulos	zthr_t		*spa_checkpoint_discard_zthr;
2968671400Serapheim Dimitropoulos
297fa9e406ahrens	char		*spa_root;		/* alternate root directory */
298ea8dc4beschrock	uint64_t	spa_ena;		/* spa-wide ereport ENA */
299468c413Tim Haley	int		spa_last_open_failed;	/* error if last open failed */
300468c413Tim Haley	uint64_t	spa_last_ubsync_txg;	/* "best" uberblock txg */
301468c413Tim Haley	uint64_t	spa_last_ubsync_txg_ts;	/* timestamp from that ub */
302468c413Tim Haley	uint64_t	spa_load_txg;		/* ub txg that loaded */
303468c413Tim Haley	uint64_t	spa_load_txg_ts;	/* timestamp from that ub */
304468c413Tim Haley	uint64_t	spa_load_meta_errors;	/* verify metadata err count */
305468c413Tim Haley	uint64_t	spa_load_data_errors;	/* verify data err count */
306468c413Tim Haley	uint64_t	spa_verify_min_txg;	/* start txg of verify scrub */
307ea8dc4beschrock	kmutex_t	spa_errlog_lock;	/* error log lock */
308ea8dc4beschrock	uint64_t	spa_errlog_last;	/* last error log object */
309ea8dc4beschrock	uint64_t	spa_errlog_scrub;	/* scrub error log object */
310ea8dc4beschrock	kmutex_t	spa_errlist_lock;	/* error list/ereport lock */
311ea8dc4beschrock	avl_tree_t	spa_errlist_last;	/* last error list */
312ea8dc4beschrock	avl_tree_t	spa_errlist_scrub;	/* scrub error list */
31399653d4eschrock	uint64_t	spa_deflate;		/* should we deflate? */
31406eeb2aek	uint64_t	spa_history;		/* history object */
31506eeb2aek	kmutex_t	spa_history_lock;	/* history lock */
31639c2341eschrock	vdev_t		*spa_pending_vdev;	/* pending vdev additions */
317b1b8ab3lling	kmutex_t	spa_props_lock;		/* property lock */
318b1b8ab3lling	uint64_t	spa_pool_props_object;	/* object for properties */
319b1b8ab3lling	uint64_t	spa_bootfs;		/* default boot filesystem */
320e14bb32Jeff Bonwick	uint64_t	spa_failmode;		/* failure mode for the pool */
321e14bb32Jeff Bonwick	uint64_t	spa_delegation;		/* delegation on/off */
322c5904d1eschrock	list_t		spa_config_list;	/* previous cache file(s) */
3236f834bcMatthew Ahrens	/* per-CPU array of root of async I/O: */
3246f834bcMatthew Ahrens	zio_t		**spa_async_zio_root;
325e14bb32Jeff Bonwick	zio_t		*spa_suspend_zio_root;	/* root of all suspended I/O */
3265cabbc6Prashanth Sreenivasa	zio_t		*spa_txg_zio[TXG_SIZE]; /* spa_sync() waits for this */
327e14bb32Jeff Bonwick	kmutex_t	spa_suspend_lock;	/* protects suspend_zio_root */
328e14bb32Jeff Bonwick	kcondvar_t	spa_suspend_cv;		/* notification of resume */
329e14bb32Jeff Bonwick	uint8_t		spa_suspended;		/* pool is suspended */
330b24ab67Jeff Bonwick	uint8_t		spa_claiming;		/* pool is doing zil_claim() */
331bf82a41eschrock	boolean_t	spa_is_root;		/* pool is root */
332088f389ahrens	int		spa_minref;		/* num refs when first opened */
3338ad4d6dJeff Bonwick	int		spa_mode;		/* FREAD | FWRITE */
334b87f3afperrin	spa_log_state_t spa_log_state;		/* log state */
335573ca77George Wilson	uint64_t	spa_autoexpand;		/* lun expansion on/off */
3367855d95Toomas Soome	uint64_t	spa_bootsize;		/* efi system partition size */
337b24ab67Jeff Bonwick	ddt_t		*spa_ddt[ZIO_CHECKSUM_FUNCTIONS]; /* in-core DDTs */
338b24ab67Jeff Bonwick	uint64_t	spa_ddt_stat_object;	/* DDT statistics */
339b24ab67Jeff Bonwick	uint64_t	spa_dedup_ditto;	/* dedup ditto threshold */
340b24ab67Jeff Bonwick	uint64_t	spa_dedup_checksum;	/* default dedup checksum */
341485bbbfGeorge Wilson	uint64_t	spa_dspace;		/* dspace in normal class */
342a152156Jeff Bonwick	kmutex_t	spa_vdev_top_lock;	/* dueling offline/remove */
34335a5a35Jonathan Adams	kmutex_t	spa_proc_lock;		/* protects spa_proc* */
34435a5a35Jonathan Adams	kcondvar_t	spa_proc_cv;		/* spa_proc_state transitions */
34535a5a35Jonathan Adams	spa_proc_state_t spa_proc_state;	/* see definition */
34635a5a35Jonathan Adams	struct proc	*spa_proc;		/* "zpool-poolname" process */
34735a5a35Jonathan Adams	uint64_t	spa_did;		/* if procp != p0, did of t1 */
348b693757Eric Schrock	boolean_t	spa_autoreplace;	/* autoreplace set in open */
3498f18d1fGeorge Wilson	int		spa_vdev_locks;		/* locks grabbed */
3503f9d6adLin Ling	uint64_t	spa_creation_version;	/* version at pool creation */
351ad135b5Christopher Siden	uint64_t	spa_prev_software_version; /* See ub_software_version */
352ad135b5Christopher Siden	uint64_t	spa_feat_for_write_obj;	/* required to write to pool */
353ad135b5Christopher Siden	uint64_t	spa_feat_for_read_obj;	/* required to read from pool */
354ad135b5Christopher Siden	uint64_t	spa_feat_desc_obj;	/* Feature descriptions */
35543466aaMax Grossman	uint64_t	spa_feat_enabled_txg_obj; /* Feature enabled txg */
35643466aaMax Grossman	/* cache feature refcounts */
35743466aaMax Grossman	uint64_t	spa_feat_refcount_cache[SPA_FEATURES];
358283b846George.Wilson	cyclic_id_t	spa_deadman_cycid;	/* cyclic id */
359283b846George.Wilson	uint64_t	spa_deadman_calls;	/* number of deadman calls */
36069962b5Matthew Ahrens	hrtime_t	spa_sync_starttime;	/* starting time fo spa_sync */
361283b846George.Wilson	uint64_t	spa_deadman_synctime;	/* deadman expiration timer */
362215198aJoe Stein	uint64_t	spa_all_vdev_zaps;	/* ZAP of per-vd ZAP obj #s */
363215198aJoe Stein	spa_avz_action_t	spa_avz_action;	/* destroy/rebuild AVZ? */
36469962b5Matthew Ahrens
36569962b5Matthew Ahrens	/*
36669962b5Matthew Ahrens	 * spa_iokstat_lock protects spa_iokstat and
36769962b5Matthew Ahrens	 * spa_queue_stats[].
36869962b5Matthew Ahrens	 */
36969962b5Matthew Ahrens	kmutex_t	spa_iokstat_lock;
370c3a6601Matthew Ahrens	struct kstat	*spa_iokstat;		/* kstat of io to this pool */
37169962b5Matthew Ahrens	struct {
37269962b5Matthew Ahrens		int spa_active;
37369962b5Matthew Ahrens		int spa_queued;
37469962b5Matthew Ahrens	} spa_queue_stats[ZIO_PRIORITY_NUM_QUEUEABLE];
37569962b5Matthew Ahrens
376abe1fd0Don Brady	/* arc_memory_throttle() parameters during low memory condition */
377abe1fd0Don Brady	uint64_t	spa_lowmem_page_load;	/* memory load during txg */
378abe1fd0Don Brady	uint64_t	spa_lowmem_last_txg;	/* txg window start */
379abe1fd0Don Brady
3803cb69f7Will Andrews	hrtime_t	spa_ccw_fail_time;	/* Conf cache write fail time */
38169962b5Matthew Ahrens
382fa9e406ahrens	/*
383f717074Will Andrews	 * spa_refcount & spa_config_lock must be the last elements
38491ebeefahrens	 * because refcount_t changes size based on compilation options.
38591ebeefahrens	 * In order for the MDB module to function correctly, the other
38691ebeefahrens	 * fields must remain in the same location.
387fa9e406ahrens	 */
388e14bb32Jeff Bonwick	spa_config_lock_t spa_config_lock[SCL_LOCKS]; /* config changes */
389fa9e406ahrens	refcount_t	spa_refcount;		/* number of opens */
392c5904d1eschrockextern const char *spa_config_path;
394ec94d32Adam Leventhalextern void spa_taskq_dispatch_ent(spa_t *spa, zio_type_t t, zio_taskq_type_t q,
395ec94d32Adam Leventhal    task_func_t *func, void *arg, uint_t flags, taskq_ent_t *ent);
3965cabbc6Prashanth Sreenivasaextern void spa_load_spares(spa_t *spa);
3975cabbc6Prashanth Sreenivasaextern void spa_load_l2cache(spa_t *spa);
398ec94d32Adam Leventhal
399fa9e406ahrens#ifdef	__cplusplus
403fa9e406ahrens#endif	/* _SYS_SPA_IMPL_H */