summaryrefslogtreecommitdiffstats
path: root/include/sys/spa_impl.h
blob: a1bf14eacdec3141db09950fe5af720e59f4bd9a (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
/*
 * 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.
 * Copyright (c) 2011, 2015 by Delphix. All rights reserved.
 * Copyright 2011 Nexenta Systems, Inc.  All rights reserved.
 * Copyright (c) 2014 Spectra Logic Corporation, All rights reserved.
 * Copyright 2013 Saso Kiselkov. All rights reserved.
 * Copyright (c) 2016 Actifio, Inc. All rights reserved.
 */

#ifndef _SYS_SPA_IMPL_H
#define	_SYS_SPA_IMPL_H

#include <sys/spa.h>
#include <sys/vdev.h>
#include <sys/metaslab.h>
#include <sys/dmu.h>
#include <sys/dsl_pool.h>
#include <sys/uberblock_impl.h>
#include <sys/zfs_context.h>
#include <sys/avl.h>
#include <sys/refcount.h>
#include <sys/bplist.h>
#include <sys/bpobj.h>
#include <sys/zfeature.h>
#include <zfeature_common.h>

#ifdef	__cplusplus
extern "C" {
#endif

typedef struct spa_error_entry {
	zbookmark_phys_t	se_bookmark;
	char			*se_name;
	avl_node_t		se_avl;
} spa_error_entry_t;

typedef struct spa_history_phys {
	uint64_t sh_pool_create_len;	/* ending offset of zpool create */
	uint64_t sh_phys_max_off;	/* physical EOF */
	uint64_t sh_bof;		/* logical BOF */
	uint64_t sh_eof;		/* logical EOF */
	uint64_t sh_records_lost;	/* num of records overwritten */
} spa_history_phys_t;

struct spa_aux_vdev {
	uint64_t	sav_object;		/* MOS object for device list */
	nvlist_t	*sav_config;		/* cached device config */
	vdev_t		**sav_vdevs;		/* devices */
	int		sav_count;		/* number devices */
	boolean_t	sav_sync;		/* sync the device list */
	nvlist_t	**sav_pending;		/* pending device additions */
	uint_t		sav_npending;		/* # pending devices */
};

typedef struct spa_config_lock {
	kmutex_t	scl_lock;
	kthread_t	*scl_writer;
	int		scl_write_wanted;
	kcondvar_t	scl_cv;
	refcount_t	scl_count;
} spa_config_lock_t;

typedef struct spa_config_dirent {
	list_node_t	scd_link;
	char		*scd_path;
} spa_config_dirent_t;

typedef enum zio_taskq_type {
	ZIO_TASKQ_ISSUE = 0,
	ZIO_TASKQ_ISSUE_HIGH,
	ZIO_TASKQ_INTERRUPT,
	ZIO_TASKQ_INTERRUPT_HIGH,
	ZIO_TASKQ_TYPES
} zio_taskq_type_t;

/*
 * State machine for the zpool-poolname process.  The states transitions
 * are done as follows:
 *
 *	From		   To			Routine
 *	PROC_NONE	-> PROC_CREATED		spa_activate()
 *	PROC_CREATED	-> PROC_ACTIVE		spa_thread()
 *	PROC_ACTIVE	-> PROC_DEACTIVATE	spa_deactivate()
 *	PROC_DEACTIVATE	-> PROC_GONE		spa_thread()
 *	PROC_GONE	-> PROC_NONE		spa_deactivate()
 */
typedef enum spa_proc_state {
	SPA_PROC_NONE,		/* spa_proc = &p0, no process created */
	SPA_PROC_CREATED,	/* spa_activate() has proc, is waiting */
	SPA_PROC_ACTIVE,	/* taskqs created, spa_proc set */
	SPA_PROC_DEACTIVATE,	/* spa_deactivate() requests process exit */
	SPA_PROC_GONE		/* spa_thread() is exiting, spa_proc = &p0 */
} spa_proc_state_t;

typedef struct spa_taskqs {
	uint_t stqs_count;
	taskq_t **stqs_taskq;
} spa_taskqs_t;

typedef enum spa_all_vdev_zap_action {
	AVZ_ACTION_NONE = 0,
	AVZ_ACTION_DESTROY,	/* Destroy all per-vdev ZAPs and the AVZ. */
	AVZ_ACTION_REBUILD	/* Populate the new AVZ, see spa_avz_rebuild */
} spa_avz_action_t;

struct spa {
	/*
	 * Fields protected by spa_namespace_lock.
	 */
	char		spa_name[ZFS_MAX_DATASET_NAME_LEN];	/* pool name */
	char		*spa_comment;		/* comment */
	avl_node_t	spa_avl;		/* node in spa_namespace_avl */
	nvlist_t	*spa_config;		/* last synced config */
	nvlist_t	*spa_config_syncing;	/* currently syncing config */
	nvlist_t	*spa_config_splitting;	/* config for splitting */
	nvlist_t	*spa_load_info;		/* info and errors from load */
	uint64_t	spa_config_txg;		/* txg of last config change */
	int		spa_sync_pass;		/* iterate-to-convergence */
	pool_state_t	spa_state;		/* pool state */
	int		spa_inject_ref;		/* injection references */
	uint8_t		spa_sync_on;		/* sync threads are running */
	spa_load_state_t spa_load_state;	/* current load operation */
	uint64_t	spa_import_flags;	/* import specific flags */
	spa_taskqs_t	spa_zio_taskq[ZIO_TYPES][ZIO_TASKQ_TYPES];
	dsl_pool_t	*spa_dsl_pool;
	boolean_t	spa_is_initializing;	/* true while opening pool */
	metaslab_class_t *spa_normal_class;	/* normal data class */
	metaslab_class_t *spa_log_class;	/* intent log data class */
	uint64_t	spa_first_txg;		/* first txg after spa_open() */
	uint64_t	spa_final_txg;		/* txg of export/destroy */
	uint64_t	spa_freeze_txg;		/* freeze pool at this txg */
	uint64_t	spa_load_max_txg;	/* best initial ub_txg */
	uint64_t	spa_claim_max_txg;	/* highest claimed birth txg */
	timespec_t	spa_loaded_ts;		/* 1st successful open time */
	objset_t	*spa_meta_objset;	/* copy of dp->dp_meta_objset */
	kmutex_t	spa_evicting_os_lock;	/* Evicting objset list lock */
	list_t		spa_evicting_os_list;	/* Objsets being evicted. */
	kcondvar_t	spa_evicting_os_cv;	/* Objset Eviction Completion */
	txg_list_t	spa_vdev_txg_list;	/* per-txg dirty vdev list */
	vdev_t		*spa_root_vdev;		/* top-level vdev container */
	int		spa_min_ashift;		/* of vdevs in normal class */
	int		spa_max_ashift;		/* of vdevs in normal class */
	uint64_t	spa_config_guid;	/* config pool guid */
	uint64_t	spa_load_guid;		/* spa_load initialized guid */
	uint64_t	spa_last_synced_guid;	/* last synced guid */
	list_t		spa_config_dirty_list;	/* vdevs with dirty config */
	list_t		spa_state_dirty_list;	/* vdevs with dirty state */
	kmutex_t	spa_alloc_lock;
	avl_tree_t	spa_alloc_tree;
	spa_aux_vdev_t	spa_spares;		/* hot spares */
	spa_aux_vdev_t	spa_l2cache;		/* L2ARC cache devices */
	nvlist_t	*spa_label_features;	/* Features for reading MOS */
	uint64_t	spa_config_object;	/* MOS object for pool config */
	uint64_t	spa_config_generation;	/* config generation number */
	uint64_t	spa_syncing_txg;	/* txg currently syncing */
	bpobj_t		spa_deferred_bpobj;	/* deferred-free bplist */
	bplist_t	spa_free_bplist[TXG_SIZE]; /* bplist of stuff to free */
	zio_cksum_salt_t spa_cksum_salt;	/* secret salt for cksum */
	/* checksum context templates */
	kmutex_t	spa_cksum_tmpls_lock;
	void		*spa_cksum_tmpls[ZIO_CHECKSUM_FUNCTIONS];
	uberblock_t	spa_ubsync;		/* last synced uberblock */
	uberblock_t	spa_uberblock;		/* current uberblock */
	boolean_t	spa_extreme_rewind;	/* rewind past deferred frees */
	uint64_t	spa_last_io;		/* lbolt of last non-scan I/O */
	kmutex_t	spa_scrub_lock;		/* resilver/scrub lock */
	uint64_t	spa_scrub_inflight;	/* in-flight scrub I/Os */
	kcondvar_t	spa_scrub_io_cv;	/* scrub I/O completion */
	uint8_t		spa_scrub_active;	/* active or suspended? */
	uint8_t		spa_scrub_type;		/* type of scrub we're doing */
	uint8_t		spa_scrub_finished;	/* indicator to rotate logs */
	uint8_t		spa_scrub_started;	/* started since last boot */
	uint8_t		spa_scrub_reopen;	/* scrub doing vdev_reopen */
	uint64_t	spa_scan_pass_start;	/* start time per pass/reboot */
	uint64_t	spa_scan_pass_exam;	/* examined bytes per pass */
	kmutex_t	spa_async_lock;		/* protect async state */
	kthread_t	*spa_async_thread;	/* thread doing async task */
	int		spa_async_suspended;	/* async tasks suspended */
	kcondvar_t	spa_async_cv;		/* wait for thread_exit() */
	uint16_t	spa_async_tasks;	/* async task mask */
	char		*spa_root;		/* alternate root directory */
	uint64_t	spa_ena;		/* spa-wide ereport ENA */
	int		spa_last_open_failed;	/* error if last open failed */
	uint64_t	spa_last_ubsync_txg;	/* "best" uberblock txg */
	uint64_t	spa_last_ubsync_txg_ts;	/* timestamp from that ub */
	uint64_t	spa_load_txg;		/* ub txg that loaded */
	uint64_t	spa_load_txg_ts;	/* timestamp from that ub */
	uint64_t	spa_load_meta_errors;	/* verify metadata err count */
	uint64_t	spa_load_data_errors;	/* verify data err count */
	uint64_t	spa_verify_min_txg;	/* start txg of verify scrub */
	kmutex_t	spa_errlog_lock;	/* error log lock */
	uint64_t	spa_errlog_last;	/* last error log object */
	uint64_t	spa_errlog_scrub;	/* scrub error log object */
	kmutex_t	spa_errlist_lock;	/* error list/ereport lock */
	avl_tree_t	spa_errlist_last;	/* last error list */
	avl_tree_t	spa_errlist_scrub;	/* scrub error list */
	uint64_t	spa_deflate;		/* should we deflate? */
	uint64_t	spa_history;		/* history object */
	kmutex_t	spa_history_lock;	/* history lock */
	vdev_t		*spa_pending_vdev;	/* pending vdev additions */
	kmutex_t	spa_props_lock;		/* property lock */
	uint64_t	spa_pool_props_object;	/* object for properties */
	uint64_t	spa_bootfs;		/* default boot filesystem */
	uint64_t	spa_failmode;		/* failure mode for the pool */
	uint64_t	spa_delegation;		/* delegation on/off */
	list_t		spa_config_list;	/* previous cache file(s) */
	/* per-CPU array of root of async I/O: */
	zio_t		**spa_async_zio_root;
	zio_t		*spa_suspend_zio_root;	/* root of all suspended I/O */
	kmutex_t	spa_suspend_lock;	/* protects suspend_zio_root */
	kcondvar_t	spa_suspend_cv;		/* notification of resume */
	uint8_t		spa_suspended;		/* pool is suspended */
	uint8_t		spa_claiming;		/* pool is doing zil_claim() */
	boolean_t	spa_debug;		/* debug enabled? */
	boolean_t	spa_is_root;		/* pool is root */
	int		spa_minref;		/* num refs when first opened */
	int		spa_mode;		/* FREAD | FWRITE */
	spa_log_state_t spa_log_state;		/* log state */
	uint64_t	spa_autoexpand;		/* lun expansion on/off */
	ddt_t		*spa_ddt[ZIO_CHECKSUM_FUNCTIONS]; /* in-core DDTs */
	uint64_t	spa_ddt_stat_object;	/* DDT statistics */
	uint64_t	spa_dedup_dspace;	/* Cache get_dedup_dspace() */
	uint64_t	spa_dedup_ditto;	/* dedup ditto threshold */
	uint64_t	spa_dedup_checksum;	/* default dedup checksum */
	uint64_t	spa_dspace;		/* dspace in normal class */
	kmutex_t	spa_vdev_top_lock;	/* dueling offline/remove */
	kmutex_t	spa_proc_lock;		/* protects spa_proc* */
	kcondvar_t	spa_proc_cv;		/* spa_proc_state transitions */
	spa_proc_state_t spa_proc_state;	/* see definition */
	proc_t		*spa_proc;		/* "zpool-poolname" process */
	uint64_t	spa_did;		/* if procp != p0, did of t1 */
	boolean_t	spa_autoreplace;	/* autoreplace set in open */
	int		spa_vdev_locks;		/* locks grabbed */
	uint64_t	spa_creation_version;	/* version at pool creation */
	uint64_t	spa_prev_software_version; /* See ub_software_version */
	uint64_t	spa_feat_for_write_obj;	/* required to write to pool */
	uint64_t	spa_feat_for_read_obj;	/* required to read from pool */
	uint64_t	spa_feat_desc_obj;	/* Feature descriptions */
	uint64_t	spa_feat_enabled_txg_obj; /* Feature enabled txg */
	kmutex_t	spa_feat_stats_lock;	/* protects spa_feat_stats */
	nvlist_t	*spa_feat_stats;	/* Cache of enabled features */
	/* cache feature refcounts */
	uint64_t	spa_feat_refcount_cache[SPA_FEATURES];
	taskqid_t	spa_deadman_tqid;	/* Task id */
	uint64_t	spa_deadman_calls;	/* number of deadman calls */
	hrtime_t	spa_sync_starttime;	/* starting time of spa_sync */
	uint64_t	spa_deadman_synctime;	/* deadman expiration timer */
	uint64_t	spa_all_vdev_zaps;	/* ZAP of per-vd ZAP obj #s */
	spa_avz_action_t	spa_avz_action;	/* destroy/rebuild AVZ? */
	uint64_t	spa_errata;		/* errata issues detected */
	spa_stats_t	spa_stats;		/* assorted spa statistics */
	hrtime_t	spa_ccw_fail_time;	/* Conf cache write fail time */
	taskq_t		*spa_zvol_taskq;	/* Taskq for minor managment */

	/*
	 * spa_refcount & spa_config_lock must be the last elements
	 * because refcount_t changes size based on compilation options.
	 * In order for the MDB module to function correctly, the other
	 * fields must remain in the same location.
	 */
	spa_config_lock_t spa_config_lock[SCL_LOCKS]; /* config changes */
	refcount_t	spa_refcount;		/* number of opens */

	taskq_t		*spa_upgrade_taskq;	/* taskq for upgrade jobs */
};

extern char *spa_config_path;

extern void spa_taskq_dispatch_ent(spa_t *spa, zio_type_t t, zio_taskq_type_t q,
    task_func_t *func, void *arg, uint_t flags, taskq_ent_t *ent);
extern void spa_taskq_dispatch_sync(spa_t *, zio_type_t t, zio_taskq_type_t q,
    task_func_t *func, void *arg, uint_t flags);


#ifdef	__cplusplus
}
#endif

#endif	/* _SYS_SPA_IMPL_H */