xref: /illumos-gate/usr/src/uts/common/fs/zfs/sys/spa_impl.h (revision dd50e0cc)
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, 2019 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  * Copyright 2013 Saso Kiselkov. All rights reserved.
27  * Copyright (c) 2017 Datto Inc.
28  * Copyright (c) 2017, Intel Corporation.
29  * Copyright 2019 Joyent, Inc.
30  */
31 
32 #ifndef _SYS_SPA_IMPL_H
33 #define	_SYS_SPA_IMPL_H
34 
35 #include <sys/spa.h>
36 #include <sys/spa_checkpoint.h>
37 #include <sys/spa_log_spacemap.h>
38 #include <sys/vdev.h>
39 #include <sys/vdev_removal.h>
40 #include <sys/metaslab.h>
41 #include <sys/dmu.h>
42 #include <sys/dsl_pool.h>
43 #include <sys/uberblock_impl.h>
44 #include <sys/zfs_context.h>
45 #include <sys/avl.h>
46 #include <sys/refcount.h>
47 #include <sys/bplist.h>
48 #include <sys/bpobj.h>
49 #include <sys/dsl_crypt.h>
50 #include <sys/zfeature.h>
51 #include <sys/zthr.h>
52 #include <zfeature_common.h>
53 
54 #ifdef	__cplusplus
55 extern "C" {
56 #endif
57 
58 typedef struct spa_error_entry {
59 	zbookmark_phys_t	se_bookmark;
60 	char			*se_name;
61 	avl_node_t		se_avl;
62 } spa_error_entry_t;
63 
64 typedef struct spa_history_phys {
65 	uint64_t sh_pool_create_len;	/* ending offset of zpool create */
66 	uint64_t sh_phys_max_off;	/* physical EOF */
67 	uint64_t sh_bof;		/* logical BOF */
68 	uint64_t sh_eof;		/* logical EOF */
69 	uint64_t sh_records_lost;	/* num of records overwritten */
70 } spa_history_phys_t;
71 
72 /*
73  * All members must be uint64_t, for byteswap purposes.
74  */
75 typedef struct spa_removing_phys {
76 	uint64_t sr_state; /* dsl_scan_state_t */
77 
78 	/*
79 	 * The vdev ID that we most recently attempted to remove,
80 	 * or -1 if no removal has been attempted.
81 	 */
82 	uint64_t sr_removing_vdev;
83 
84 	/*
85 	 * The vdev ID that we most recently successfully removed,
86 	 * or -1 if no devices have been removed.
87 	 */
88 	uint64_t sr_prev_indirect_vdev;
89 
90 	uint64_t sr_start_time;
91 	uint64_t sr_end_time;
92 
93 	/*
94 	 * Note that we can not use the space map's or indirect mapping's
95 	 * accounting as a substitute for these values, because we need to
96 	 * count frees of not-yet-copied data as though it did the copy.
97 	 * Otherwise, we could get into a situation where copied > to_copy,
98 	 * or we complete before copied == to_copy.
99 	 */
100 	uint64_t sr_to_copy; /* bytes that need to be copied */
101 	uint64_t sr_copied; /* bytes that have been copied or freed */
102 } spa_removing_phys_t;
103 
104 /*
105  * This struct is stored as an entry in the DMU_POOL_DIRECTORY_OBJECT
106  * (with key DMU_POOL_CONDENSING_INDIRECT).  It is present if a condense
107  * of an indirect vdev's mapping object is in progress.
108  */
109 typedef struct spa_condensing_indirect_phys {
110 	/*
111 	 * The vdev ID of the indirect vdev whose indirect mapping is
112 	 * being condensed.
113 	 */
114 	uint64_t	scip_vdev;
115 
116 	/*
117 	 * The vdev's old obsolete spacemap.  This spacemap's contents are
118 	 * being integrated into the new mapping.
119 	 */
120 	uint64_t	scip_prev_obsolete_sm_object;
121 
122 	/*
123 	 * The new mapping object that is being created.
124 	 */
125 	uint64_t	scip_next_mapping_object;
126 } spa_condensing_indirect_phys_t;
127 
128 struct spa_aux_vdev {
129 	uint64_t	sav_object;		/* MOS object for device list */
130 	nvlist_t	*sav_config;		/* cached device config */
131 	vdev_t		**sav_vdevs;		/* devices */
132 	int		sav_count;		/* number devices */
133 	boolean_t	sav_sync;		/* sync the device list */
134 	nvlist_t	**sav_pending;		/* pending device additions */
135 	uint_t		sav_npending;		/* # pending devices */
136 };
137 
138 typedef struct spa_config_lock {
139 	kmutex_t	scl_lock;
140 	kthread_t	*scl_writer;
141 	int		scl_write_wanted;
142 	kcondvar_t	scl_cv;
143 	zfs_refcount_t	scl_count;
144 } spa_config_lock_t;
145 
146 typedef struct spa_config_dirent {
147 	list_node_t	scd_link;
148 	char		*scd_path;
149 } spa_config_dirent_t;
150 
151 typedef enum zio_taskq_type {
152 	ZIO_TASKQ_ISSUE = 0,
153 	ZIO_TASKQ_ISSUE_HIGH,
154 	ZIO_TASKQ_INTERRUPT,
155 	ZIO_TASKQ_INTERRUPT_HIGH,
156 	ZIO_TASKQ_TYPES
157 } zio_taskq_type_t;
158 
159 /*
160  * State machine for the zpool-poolname process.  The states transitions
161  * are done as follows:
162  *
163  *	From		   To			Routine
164  *	PROC_NONE	-> PROC_CREATED		spa_activate()
165  *	PROC_CREATED	-> PROC_ACTIVE		spa_thread()
166  *	PROC_ACTIVE	-> PROC_DEACTIVATE	spa_deactivate()
167  *	PROC_DEACTIVATE	-> PROC_GONE		spa_thread()
168  *	PROC_GONE	-> PROC_NONE		spa_deactivate()
169  */
170 typedef enum spa_proc_state {
171 	SPA_PROC_NONE,		/* spa_proc = &p0, no process created */
172 	SPA_PROC_CREATED,	/* spa_activate() has proc, is waiting */
173 	SPA_PROC_ACTIVE,	/* taskqs created, spa_proc set */
174 	SPA_PROC_DEACTIVATE,	/* spa_deactivate() requests process exit */
175 	SPA_PROC_GONE		/* spa_thread() is exiting, spa_proc = &p0 */
176 } spa_proc_state_t;
177 
178 typedef struct spa_taskqs {
179 	uint_t stqs_count;
180 	taskq_t **stqs_taskq;
181 } spa_taskqs_t;
182 
183 typedef enum spa_all_vdev_zap_action {
184 	AVZ_ACTION_NONE = 0,
185 	AVZ_ACTION_DESTROY,	/* Destroy all per-vdev ZAPs and the AVZ. */
186 	AVZ_ACTION_REBUILD,	/* Populate the new AVZ, see spa_avz_rebuild */
187 	AVZ_ACTION_INITIALIZE
188 } spa_avz_action_t;
189 
190 typedef enum spa_config_source {
191 	SPA_CONFIG_SRC_NONE = 0,
192 	SPA_CONFIG_SRC_SCAN,		/* scan of path (default: /dev/dsk) */
193 	SPA_CONFIG_SRC_CACHEFILE,	/* any cachefile */
194 	SPA_CONFIG_SRC_TRYIMPORT,	/* returned from call to tryimport */
195 	SPA_CONFIG_SRC_SPLIT,		/* new pool in a pool split */
196 	SPA_CONFIG_SRC_MOS		/* MOS, but not always from right txg */
197 } spa_config_source_t;
198 
199 struct spa {
200 	/*
201 	 * Fields protected by spa_namespace_lock.
202 	 */
203 	char		spa_name[ZFS_MAX_DATASET_NAME_LEN];	/* pool name */
204 	char		*spa_comment;		/* comment */
205 	avl_node_t	spa_avl;		/* node in spa_namespace_avl */
206 	nvlist_t	*spa_config;		/* last synced config */
207 	nvlist_t	*spa_config_syncing;	/* currently syncing config */
208 	nvlist_t	*spa_config_splitting;	/* config for splitting */
209 	nvlist_t	*spa_load_info;		/* info and errors from load */
210 	uint64_t	spa_config_txg;		/* txg of last config change */
211 	int		spa_sync_pass;		/* iterate-to-convergence */
212 	pool_state_t	spa_state;		/* pool state */
213 	int		spa_inject_ref;		/* injection references */
214 	uint8_t		spa_sync_on;		/* sync threads are running */
215 	spa_load_state_t spa_load_state;	/* current load operation */
216 	boolean_t	spa_indirect_vdevs_loaded; /* mappings loaded? */
217 	boolean_t	spa_trust_config;	/* do we trust vdev tree? */
218 	spa_config_source_t spa_config_source;	/* where config comes from? */
219 	uint64_t	spa_import_flags;	/* import specific flags */
220 	spa_taskqs_t	spa_zio_taskq[ZIO_TYPES][ZIO_TASKQ_TYPES];
221 	dsl_pool_t	*spa_dsl_pool;
222 	boolean_t	spa_is_initializing;	/* true while opening pool */
223 	metaslab_class_t *spa_normal_class;	/* normal data class */
224 	metaslab_class_t *spa_log_class;	/* intent log data class */
225 	metaslab_class_t *spa_special_class;	/* special allocation class */
226 	metaslab_class_t *spa_dedup_class;	/* dedup allocation class */
227 	uint64_t	spa_first_txg;		/* first txg after spa_open() */
228 	uint64_t	spa_final_txg;		/* txg of export/destroy */
229 	uint64_t	spa_freeze_txg;		/* freeze pool at this txg */
230 	uint64_t	spa_load_max_txg;	/* best initial ub_txg */
231 	uint64_t	spa_claim_max_txg;	/* highest claimed birth txg */
232 	timespec_t	spa_loaded_ts;		/* 1st successful open time */
233 	objset_t	*spa_meta_objset;	/* copy of dp->dp_meta_objset */
234 	kmutex_t	spa_evicting_os_lock;	/* Evicting objset list lock */
235 	list_t		spa_evicting_os_list;	/* Objsets being evicted. */
236 	kcondvar_t	spa_evicting_os_cv;	/* Objset Eviction Completion */
237 	txg_list_t	spa_vdev_txg_list;	/* per-txg dirty vdev list */
238 	vdev_t		*spa_root_vdev;		/* top-level vdev container */
239 	int		spa_min_ashift;		/* of vdevs in normal class */
240 	int		spa_max_ashift;		/* of vdevs in normal class */
241 	uint64_t	spa_config_guid;	/* config pool guid */
242 	uint64_t	spa_load_guid;		/* spa_load initialized guid */
243 	uint64_t	spa_last_synced_guid;	/* last synced guid */
244 	list_t		spa_config_dirty_list;	/* vdevs with dirty config */
245 	list_t		spa_state_dirty_list;	/* vdevs with dirty state */
246 	/*
247 	 * spa_alloc_locks and spa_alloc_trees are arrays, whose lengths are
248 	 * stored in spa_alloc_count. There is one tree and one lock for each
249 	 * allocator, to help improve allocation performance in write-heavy
250 	 * workloads.
251 	 */
252 	kmutex_t	*spa_alloc_locks;
253 	avl_tree_t	*spa_alloc_trees;
254 	int		spa_alloc_count;
255 
256 	spa_aux_vdev_t	spa_spares;		/* hot spares */
257 	spa_aux_vdev_t	spa_l2cache;		/* L2ARC cache devices */
258 	hrtime_t	spa_spares_last_polled;	/* time spares last polled */
259 	nvlist_t	*spa_label_features;	/* Features for reading MOS */
260 	uint64_t	spa_config_object;	/* MOS object for pool config */
261 	uint64_t	spa_config_generation;	/* config generation number */
262 	uint64_t	spa_syncing_txg;	/* txg currently syncing */
263 	bpobj_t		spa_deferred_bpobj;	/* deferred-free bplist */
264 	bplist_t	spa_free_bplist[TXG_SIZE]; /* bplist of stuff to free */
265 	zio_cksum_salt_t spa_cksum_salt;	/* secret salt for cksum */
266 	/* checksum context templates */
267 	kmutex_t	spa_cksum_tmpls_lock;
268 	void		*spa_cksum_tmpls[ZIO_CHECKSUM_FUNCTIONS];
269 	uberblock_t	spa_ubsync;		/* last synced uberblock */
270 	uberblock_t	spa_uberblock;		/* current uberblock */
271 	boolean_t	spa_extreme_rewind;	/* rewind past deferred frees */
272 	kmutex_t	spa_scrub_lock;		/* resilver/scrub lock */
273 	uint64_t	spa_scrub_inflight;	/* in-flight scrub bytes */
274 	uint64_t	spa_load_verify_ios;	/* in-flight verification IOs */
275 	kcondvar_t	spa_scrub_io_cv;	/* scrub I/O completion */
276 	uint8_t		spa_scrub_active;	/* active or suspended? */
277 	uint8_t		spa_scrub_type;		/* type of scrub we're doing */
278 	uint8_t		spa_scrub_finished;	/* indicator to rotate logs */
279 	uint8_t		spa_scrub_started;	/* started since last boot */
280 	uint8_t		spa_scrub_reopen;	/* scrub doing vdev_reopen */
281 	uint64_t	spa_scan_pass_start;	/* start time per pass/reboot */
282 	uint64_t	spa_scan_pass_scrub_pause; /* scrub pause time */
283 	uint64_t	spa_scan_pass_scrub_spent_paused; /* total paused */
284 	uint64_t	spa_scan_pass_exam;	/* examined bytes per pass */
285 	uint64_t	spa_scan_pass_issued;	/* issued bytes per pass */
286 
287 	/*
288 	 * We are in the middle of a resilver, and another resilver
289 	 * is needed once this one completes. This is set iff any
290 	 * vdev_resilver_deferred is set.
291 	 */
292 	boolean_t	spa_resilver_deferred;
293 	kmutex_t	spa_async_lock;		/* protect async state */
294 	kthread_t	*spa_async_thread;	/* thread doing async task */
295 	int		spa_async_suspended;	/* async tasks suspended */
296 	kcondvar_t	spa_async_cv;		/* wait for thread_exit() */
297 	uint16_t	spa_async_tasks;	/* async task mask */
298 	uint64_t	spa_missing_tvds;	/* unopenable tvds on load */
299 	uint64_t	spa_missing_tvds_allowed; /* allow loading spa? */
300 
301 	spa_removing_phys_t spa_removing_phys;
302 	spa_vdev_removal_t *spa_vdev_removal;
303 
304 	spa_condensing_indirect_phys_t	spa_condensing_indirect_phys;
305 	spa_condensing_indirect_t	*spa_condensing_indirect;
306 	zthr_t		*spa_condense_zthr;	/* zthr doing condense. */
307 
308 	uint64_t	spa_checkpoint_txg;	/* the txg of the checkpoint */
309 	spa_checkpoint_info_t spa_checkpoint_info; /* checkpoint accounting */
310 	zthr_t		*spa_checkpoint_discard_zthr;
311 
312 	space_map_t	*spa_syncing_log_sm;	/* current log space map */
313 	avl_tree_t	spa_sm_logs_by_txg;
314 	kmutex_t	spa_flushed_ms_lock;	/* for metaslabs_by_flushed */
315 	avl_tree_t	spa_metaslabs_by_flushed;
316 	spa_unflushed_stats_t	spa_unflushed_stats;
317 	list_t		spa_log_summary;
318 	uint64_t	spa_log_flushall_txg;
319 
320 	char		*spa_root;		/* alternate root directory */
321 	uint64_t	spa_ena;		/* spa-wide ereport ENA */
322 	int		spa_last_open_failed;	/* error if last open failed */
323 	uint64_t	spa_last_ubsync_txg;	/* "best" uberblock txg */
324 	uint64_t	spa_last_ubsync_txg_ts;	/* timestamp from that ub */
325 	uint64_t	spa_load_txg;		/* ub txg that loaded */
326 	uint64_t	spa_load_txg_ts;	/* timestamp from that ub */
327 	uint64_t	spa_load_meta_errors;	/* verify metadata err count */
328 	uint64_t	spa_load_data_errors;	/* verify data err count */
329 	uint64_t	spa_verify_min_txg;	/* start txg of verify scrub */
330 	kmutex_t	spa_errlog_lock;	/* error log lock */
331 	uint64_t	spa_errlog_last;	/* last error log object */
332 	uint64_t	spa_errlog_scrub;	/* scrub error log object */
333 	kmutex_t	spa_errlist_lock;	/* error list/ereport lock */
334 	avl_tree_t	spa_errlist_last;	/* last error list */
335 	avl_tree_t	spa_errlist_scrub;	/* scrub error list */
336 	uint64_t	spa_deflate;		/* should we deflate? */
337 	uint64_t	spa_history;		/* history object */
338 	kmutex_t	spa_history_lock;	/* history lock */
339 	vdev_t		*spa_pending_vdev;	/* pending vdev additions */
340 	kmutex_t	spa_props_lock;		/* property lock */
341 	uint64_t	spa_pool_props_object;	/* object for properties */
342 	uint64_t	spa_bootfs;		/* default boot filesystem */
343 	uint64_t	spa_failmode;		/* failure mode for the pool */
344 	uint64_t	spa_delegation;		/* delegation on/off */
345 	list_t		spa_config_list;	/* previous cache file(s) */
346 	/* per-CPU array of root of async I/O: */
347 	zio_t		**spa_async_zio_root;
348 	zio_t		*spa_suspend_zio_root;	/* root of all suspended I/O */
349 	zio_t		*spa_txg_zio[TXG_SIZE]; /* spa_sync() waits for this */
350 	kmutex_t	spa_suspend_lock;	/* protects suspend_zio_root */
351 	kcondvar_t	spa_suspend_cv;		/* notification of resume */
352 	zio_suspend_reason_t	spa_suspended;	/* pool is suspended */
353 	uint8_t		spa_claiming;		/* pool is doing zil_claim() */
354 	boolean_t	spa_is_root;		/* pool is root */
355 	int		spa_minref;		/* num refs when first opened */
356 	int		spa_mode;		/* FREAD | FWRITE */
357 	spa_log_state_t spa_log_state;		/* log state */
358 	uint64_t	spa_autoexpand;		/* lun expansion on/off */
359 	uint64_t	spa_bootsize;		/* efi system partition size */
360 	ddt_t		*spa_ddt[ZIO_CHECKSUM_FUNCTIONS]; /* in-core DDTs */
361 	uint64_t	spa_ddt_stat_object;	/* DDT statistics */
362 	uint64_t	spa_dedup_ditto;	/* dedup ditto threshold */
363 	uint64_t	spa_dedup_checksum;	/* default dedup checksum */
364 	uint64_t	spa_dspace;		/* dspace in normal class */
365 	kmutex_t	spa_vdev_top_lock;	/* dueling offline/remove */
366 	kmutex_t	spa_proc_lock;		/* protects spa_proc* */
367 	kcondvar_t	spa_proc_cv;		/* spa_proc_state transitions */
368 	spa_proc_state_t spa_proc_state;	/* see definition */
369 	struct proc	*spa_proc;		/* "zpool-poolname" process */
370 	uint64_t	spa_did;		/* if procp != p0, did of t1 */
371 	boolean_t	spa_autoreplace;	/* autoreplace set in open */
372 	int		spa_vdev_locks;		/* locks grabbed */
373 	uint64_t	spa_creation_version;	/* version at pool creation */
374 	uint64_t	spa_prev_software_version; /* See ub_software_version */
375 	uint64_t	spa_feat_for_write_obj;	/* required to write to pool */
376 	uint64_t	spa_feat_for_read_obj;	/* required to read from pool */
377 	uint64_t	spa_feat_desc_obj;	/* Feature descriptions */
378 	uint64_t	spa_feat_enabled_txg_obj; /* Feature enabled txg */
379 	/* cache feature refcounts */
380 	uint64_t	spa_feat_refcount_cache[SPA_FEATURES];
381 	cyclic_id_t	spa_deadman_cycid;	/* cyclic id */
382 	uint64_t	spa_deadman_calls;	/* number of deadman calls */
383 	hrtime_t	spa_sync_starttime;	/* starting time fo spa_sync */
384 	uint64_t	spa_deadman_synctime;	/* deadman expiration timer */
385 	uint64_t	spa_all_vdev_zaps;	/* ZAP of per-vd ZAP obj #s */
386 	spa_avz_action_t	spa_avz_action;	/* destroy/rebuild AVZ? */
387 	uint64_t	spa_autotrim;		/* automatic background trim? */
388 	spa_keystore_t	spa_keystore;	/* loaded crypto keys */
389 	uint64_t	spa_errata;	/* errata issues detected */
390 
391 	/*
392 	 * spa_iokstat_lock protects spa_iokstat and
393 	 * spa_queue_stats[].
394 	 */
395 	kmutex_t	spa_iokstat_lock;
396 	struct kstat	*spa_iokstat;		/* kstat of io to this pool */
397 	struct {
398 		int spa_active;
399 		int spa_queued;
400 	} spa_queue_stats[ZIO_PRIORITY_NUM_QUEUEABLE];
401 
402 	/*
403 	 * The following two members diverge from OpenZFS. Upstream import
404 	 * status is built around the Linux /proc fs. On illumos we use a kstat
405 	 * to track import status. spa_imp_kstat_lock protects spa_imp_kstat.
406 	 */
407 	kmutex_t	spa_imp_kstat_lock;
408 	struct kstat	*spa_imp_kstat;		/* kstat for import status */
409 
410 	/* arc_memory_throttle() parameters during low memory condition */
411 	uint64_t	spa_lowmem_page_load;	/* memory load during txg */
412 	uint64_t	spa_lowmem_last_txg;	/* txg window start */
413 
414 	hrtime_t	spa_ccw_fail_time;	/* Conf cache write fail time */
415 
416 	uint64_t	spa_multihost;		/* multihost aware (mmp) */
417 	mmp_thread_t	spa_mmp;		/* multihost mmp thread */
418 	list_t		spa_leaf_list;		/* list of leaf vdevs */
419 	uint64_t	spa_leaf_list_gen;	/* track leaf_list changes */
420 
421 	/*
422 	 * spa_refcount & spa_config_lock must be the last elements
423 	 * because refcount_t changes size based on compilation options.
424 	 * because zfs_refcount_t changes size based on compilation options.
425 	 * In order for the MDB module to function correctly, the other
426 	 * fields must remain in the same location.
427 	 */
428 	spa_config_lock_t spa_config_lock[SCL_LOCKS]; /* config changes */
429 	zfs_refcount_t	spa_refcount;		/* number of opens */
430 
431 	taskq_t		*spa_upgrade_taskq;	/* taskq for upgrade jobs */
432 };
433 
434 extern const char *spa_config_path;
435 
436 extern void spa_taskq_dispatch_ent(spa_t *spa, zio_type_t t, zio_taskq_type_t q,
437     task_func_t *func, void *arg, uint_t flags, taskq_ent_t *ent);
438 extern void spa_load_spares(spa_t *spa);
439 extern void spa_load_l2cache(spa_t *spa);
440 
441 #ifdef	__cplusplus
442 }
443 #endif
444 
445 #endif	/* _SYS_SPA_IMPL_H */
446