xref: /titanic_41/usr/src/uts/common/fs/zfs/sys/spa_impl.h (revision 675fc291908baceb17f92b0b6d961439aaddafc9)
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 (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
23  * Copyright (c) 2011, 2015 by Delphix. All rights reserved.
24  * Copyright 2011 Nexenta Systems, Inc.  All rights reserved.
25  * Copyright (c) 2014 Spectra Logic Corporation, All rights reserved.
26  */
27 
28 #ifndef _SYS_SPA_IMPL_H
29 #define	_SYS_SPA_IMPL_H
30 
31 #include <sys/spa.h>
32 #include <sys/vdev.h>
33 #include <sys/metaslab.h>
34 #include <sys/dmu.h>
35 #include <sys/dsl_pool.h>
36 #include <sys/uberblock_impl.h>
37 #include <sys/zfs_context.h>
38 #include <sys/avl.h>
39 #include <sys/refcount.h>
40 #include <sys/bplist.h>
41 #include <sys/bpobj.h>
42 #include <sys/zfeature.h>
43 #include <zfeature_common.h>
44 
45 #ifdef	__cplusplus
46 extern "C" {
47 #endif
48 
49 typedef struct spa_error_entry {
50 	zbookmark_phys_t	se_bookmark;
51 	char			*se_name;
52 	avl_node_t		se_avl;
53 } spa_error_entry_t;
54 
55 typedef struct spa_history_phys {
56 	uint64_t sh_pool_create_len;	/* ending offset of zpool create */
57 	uint64_t sh_phys_max_off;	/* physical EOF */
58 	uint64_t sh_bof;		/* logical BOF */
59 	uint64_t sh_eof;		/* logical EOF */
60 	uint64_t sh_records_lost;	/* num of records overwritten */
61 } spa_history_phys_t;
62 
63 struct spa_aux_vdev {
64 	uint64_t	sav_object;		/* MOS object for device list */
65 	nvlist_t	*sav_config;		/* cached device config */
66 	vdev_t		**sav_vdevs;		/* devices */
67 	int		sav_count;		/* number devices */
68 	boolean_t	sav_sync;		/* sync the device list */
69 	nvlist_t	**sav_pending;		/* pending device additions */
70 	uint_t		sav_npending;		/* # pending devices */
71 };
72 
73 typedef struct spa_config_lock {
74 	kmutex_t	scl_lock;
75 	kthread_t	*scl_writer;
76 	int		scl_write_wanted;
77 	kcondvar_t	scl_cv;
78 	refcount_t	scl_count;
79 } spa_config_lock_t;
80 
81 typedef struct spa_config_dirent {
82 	list_node_t	scd_link;
83 	char		*scd_path;
84 } spa_config_dirent_t;
85 
86 typedef enum zio_taskq_type {
87 	ZIO_TASKQ_ISSUE = 0,
88 	ZIO_TASKQ_ISSUE_HIGH,
89 	ZIO_TASKQ_INTERRUPT,
90 	ZIO_TASKQ_INTERRUPT_HIGH,
91 	ZIO_TASKQ_TYPES
92 } zio_taskq_type_t;
93 
94 /*
95  * State machine for the zpool-poolname process.  The states transitions
96  * are done as follows:
97  *
98  *	From		   To			Routine
99  *	PROC_NONE	-> PROC_CREATED		spa_activate()
100  *	PROC_CREATED	-> PROC_ACTIVE		spa_thread()
101  *	PROC_ACTIVE	-> PROC_DEACTIVATE	spa_deactivate()
102  *	PROC_DEACTIVATE	-> PROC_GONE		spa_thread()
103  *	PROC_GONE	-> PROC_NONE		spa_deactivate()
104  */
105 typedef enum spa_proc_state {
106 	SPA_PROC_NONE,		/* spa_proc = &p0, no process created */
107 	SPA_PROC_CREATED,	/* spa_activate() has proc, is waiting */
108 	SPA_PROC_ACTIVE,	/* taskqs created, spa_proc set */
109 	SPA_PROC_DEACTIVATE,	/* spa_deactivate() requests process exit */
110 	SPA_PROC_GONE		/* spa_thread() is exiting, spa_proc = &p0 */
111 } spa_proc_state_t;
112 
113 typedef struct spa_taskqs {
114 	uint_t stqs_count;
115 	taskq_t **stqs_taskq;
116 } spa_taskqs_t;
117 
118 struct spa {
119 	/*
120 	 * Fields protected by spa_namespace_lock.
121 	 */
122 	char		spa_name[ZFS_MAX_DATASET_NAME_LEN];	/* pool name */
123 	char		*spa_comment;		/* comment */
124 	avl_node_t	spa_avl;		/* node in spa_namespace_avl */
125 	nvlist_t	*spa_config;		/* last synced config */
126 	nvlist_t	*spa_config_syncing;	/* currently syncing config */
127 	nvlist_t	*spa_config_splitting;	/* config for splitting */
128 	nvlist_t	*spa_load_info;		/* info and errors from load */
129 	uint64_t	spa_config_txg;		/* txg of last config change */
130 	int		spa_sync_pass;		/* iterate-to-convergence */
131 	pool_state_t	spa_state;		/* pool state */
132 	int		spa_inject_ref;		/* injection references */
133 	uint8_t		spa_sync_on;		/* sync threads are running */
134 	spa_load_state_t spa_load_state;	/* current load operation */
135 	uint64_t	spa_import_flags;	/* import specific flags */
136 	spa_taskqs_t	spa_zio_taskq[ZIO_TYPES][ZIO_TASKQ_TYPES];
137 	dsl_pool_t	*spa_dsl_pool;
138 	boolean_t	spa_is_initializing;	/* true while opening pool */
139 	metaslab_class_t *spa_normal_class;	/* normal data class */
140 	metaslab_class_t *spa_log_class;	/* intent log data class */
141 	uint64_t	spa_first_txg;		/* first txg after spa_open() */
142 	uint64_t	spa_final_txg;		/* txg of export/destroy */
143 	uint64_t	spa_freeze_txg;		/* freeze pool at this txg */
144 	uint64_t	spa_load_max_txg;	/* best initial ub_txg */
145 	uint64_t	spa_claim_max_txg;	/* highest claimed birth txg */
146 	timespec_t	spa_loaded_ts;		/* 1st successful open time */
147 	objset_t	*spa_meta_objset;	/* copy of dp->dp_meta_objset */
148 	kmutex_t	spa_evicting_os_lock;	/* Evicting objset list lock */
149 	list_t		spa_evicting_os_list;	/* Objsets being evicted. */
150 	kcondvar_t	spa_evicting_os_cv;	/* Objset Eviction Completion */
151 	txg_list_t	spa_vdev_txg_list;	/* per-txg dirty vdev list */
152 	vdev_t		*spa_root_vdev;		/* top-level vdev container */
153 	int		spa_min_ashift;		/* of vdevs in normal class */
154 	int		spa_max_ashift;		/* of vdevs in normal class */
155 	uint64_t	spa_config_guid;	/* config pool guid */
156 	uint64_t	spa_load_guid;		/* spa_load initialized guid */
157 	uint64_t	spa_last_synced_guid;	/* last synced guid */
158 	list_t		spa_config_dirty_list;	/* vdevs with dirty config */
159 	list_t		spa_state_dirty_list;	/* vdevs with dirty state */
160 	spa_aux_vdev_t	spa_spares;		/* hot spares */
161 	spa_aux_vdev_t	spa_l2cache;		/* L2ARC cache devices */
162 	nvlist_t	*spa_label_features;	/* Features for reading MOS */
163 	uint64_t	spa_config_object;	/* MOS object for pool config */
164 	uint64_t	spa_config_generation;	/* config generation number */
165 	uint64_t	spa_syncing_txg;	/* txg currently syncing */
166 	bpobj_t		spa_deferred_bpobj;	/* deferred-free bplist */
167 	bplist_t	spa_free_bplist[TXG_SIZE]; /* bplist of stuff to free */
168 	uberblock_t	spa_ubsync;		/* last synced uberblock */
169 	uberblock_t	spa_uberblock;		/* current uberblock */
170 	boolean_t	spa_extreme_rewind;	/* rewind past deferred frees */
171 	uint64_t	spa_last_io;		/* lbolt of last non-scan I/O */
172 	kmutex_t	spa_scrub_lock;		/* resilver/scrub lock */
173 	uint64_t	spa_scrub_inflight;	/* in-flight scrub I/Os */
174 	kcondvar_t	spa_scrub_io_cv;	/* scrub I/O completion */
175 	uint8_t		spa_scrub_active;	/* active or suspended? */
176 	uint8_t		spa_scrub_type;		/* type of scrub we're doing */
177 	uint8_t		spa_scrub_finished;	/* indicator to rotate logs */
178 	uint8_t		spa_scrub_started;	/* started since last boot */
179 	uint8_t		spa_scrub_reopen;	/* scrub doing vdev_reopen */
180 	uint64_t	spa_scan_pass_start;	/* start time per pass/reboot */
181 	uint64_t	spa_scan_pass_exam;	/* examined bytes per pass */
182 	kmutex_t	spa_async_lock;		/* protect async state */
183 	kthread_t	*spa_async_thread;	/* thread doing async task */
184 	int		spa_async_suspended;	/* async tasks suspended */
185 	kcondvar_t	spa_async_cv;		/* wait for thread_exit() */
186 	uint16_t	spa_async_tasks;	/* async task mask */
187 	char		*spa_root;		/* alternate root directory */
188 	uint64_t	spa_ena;		/* spa-wide ereport ENA */
189 	int		spa_last_open_failed;	/* error if last open failed */
190 	uint64_t	spa_last_ubsync_txg;	/* "best" uberblock txg */
191 	uint64_t	spa_last_ubsync_txg_ts;	/* timestamp from that ub */
192 	uint64_t	spa_load_txg;		/* ub txg that loaded */
193 	uint64_t	spa_load_txg_ts;	/* timestamp from that ub */
194 	uint64_t	spa_load_meta_errors;	/* verify metadata err count */
195 	uint64_t	spa_load_data_errors;	/* verify data err count */
196 	uint64_t	spa_verify_min_txg;	/* start txg of verify scrub */
197 	kmutex_t	spa_errlog_lock;	/* error log lock */
198 	uint64_t	spa_errlog_last;	/* last error log object */
199 	uint64_t	spa_errlog_scrub;	/* scrub error log object */
200 	kmutex_t	spa_errlist_lock;	/* error list/ereport lock */
201 	avl_tree_t	spa_errlist_last;	/* last error list */
202 	avl_tree_t	spa_errlist_scrub;	/* scrub error list */
203 	uint64_t	spa_deflate;		/* should we deflate? */
204 	uint64_t	spa_history;		/* history object */
205 	kmutex_t	spa_history_lock;	/* history lock */
206 	vdev_t		*spa_pending_vdev;	/* pending vdev additions */
207 	kmutex_t	spa_props_lock;		/* property lock */
208 	uint64_t	spa_pool_props_object;	/* object for properties */
209 	uint64_t	spa_bootfs;		/* default boot filesystem */
210 	uint64_t	spa_failmode;		/* failure mode for the pool */
211 	uint64_t	spa_delegation;		/* delegation on/off */
212 	list_t		spa_config_list;	/* previous cache file(s) */
213 	/* per-CPU array of root of async I/O: */
214 	zio_t		**spa_async_zio_root;
215 	zio_t		*spa_suspend_zio_root;	/* root of all suspended I/O */
216 	kmutex_t	spa_suspend_lock;	/* protects suspend_zio_root */
217 	kcondvar_t	spa_suspend_cv;		/* notification of resume */
218 	uint8_t		spa_suspended;		/* pool is suspended */
219 	uint8_t		spa_claiming;		/* pool is doing zil_claim() */
220 	boolean_t	spa_debug;		/* debug enabled? */
221 	boolean_t	spa_is_root;		/* pool is root */
222 	int		spa_minref;		/* num refs when first opened */
223 	int		spa_mode;		/* FREAD | FWRITE */
224 	spa_log_state_t spa_log_state;		/* log state */
225 	uint64_t	spa_autoexpand;		/* lun expansion on/off */
226 	ddt_t		*spa_ddt[ZIO_CHECKSUM_FUNCTIONS]; /* in-core DDTs */
227 	uint64_t	spa_ddt_stat_object;	/* DDT statistics */
228 	uint64_t	spa_dedup_ditto;	/* dedup ditto threshold */
229 	uint64_t	spa_dedup_checksum;	/* default dedup checksum */
230 	uint64_t	spa_dspace;		/* dspace in normal class */
231 	kmutex_t	spa_vdev_top_lock;	/* dueling offline/remove */
232 	kmutex_t	spa_proc_lock;		/* protects spa_proc* */
233 	kcondvar_t	spa_proc_cv;		/* spa_proc_state transitions */
234 	spa_proc_state_t spa_proc_state;	/* see definition */
235 	struct proc	*spa_proc;		/* "zpool-poolname" process */
236 	uint64_t	spa_did;		/* if procp != p0, did of t1 */
237 	boolean_t	spa_autoreplace;	/* autoreplace set in open */
238 	int		spa_vdev_locks;		/* locks grabbed */
239 	uint64_t	spa_creation_version;	/* version at pool creation */
240 	uint64_t	spa_prev_software_version; /* See ub_software_version */
241 	uint64_t	spa_feat_for_write_obj;	/* required to write to pool */
242 	uint64_t	spa_feat_for_read_obj;	/* required to read from pool */
243 	uint64_t	spa_feat_desc_obj;	/* Feature descriptions */
244 	uint64_t	spa_feat_enabled_txg_obj; /* Feature enabled txg */
245 	/* cache feature refcounts */
246 	uint64_t	spa_feat_refcount_cache[SPA_FEATURES];
247 	cyclic_id_t	spa_deadman_cycid;	/* cyclic id */
248 	uint64_t	spa_deadman_calls;	/* number of deadman calls */
249 	hrtime_t	spa_sync_starttime;	/* starting time fo spa_sync */
250 	uint64_t	spa_deadman_synctime;	/* deadman expiration timer */
251 
252 	/*
253 	 * spa_iokstat_lock protects spa_iokstat and
254 	 * spa_queue_stats[].
255 	 */
256 	kmutex_t	spa_iokstat_lock;
257 	struct kstat	*spa_iokstat;		/* kstat of io to this pool */
258 	struct {
259 		int spa_active;
260 		int spa_queued;
261 	} spa_queue_stats[ZIO_PRIORITY_NUM_QUEUEABLE];
262 
263 	hrtime_t	spa_ccw_fail_time;	/* Conf cache write fail time */
264 
265 	/*
266 	 * spa_refcount & spa_config_lock must be the last elements
267 	 * because refcount_t changes size based on compilation options.
268 	 * In order for the MDB module to function correctly, the other
269 	 * fields must remain in the same location.
270 	 */
271 	spa_config_lock_t spa_config_lock[SCL_LOCKS]; /* config changes */
272 	refcount_t	spa_refcount;		/* number of opens */
273 };
274 
275 extern const char *spa_config_path;
276 
277 extern void spa_taskq_dispatch_ent(spa_t *spa, zio_type_t t, zio_taskq_type_t q,
278     task_func_t *func, void *arg, uint_t flags, taskq_ent_t *ent);
279 
280 #ifdef	__cplusplus
281 }
282 #endif
283 
284 #endif	/* _SYS_SPA_IMPL_H */
285