spa.h revision c5904d138f3bdf0762dbf452a43d5a5c387ea6a8
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 2008 Sun Microsystems, Inc.  All rights reserved.
23 * Use is subject to license terms.
24 */
25
26#ifndef _SYS_SPA_H
27#define	_SYS_SPA_H
28
29#pragma ident	"%Z%%M%	%I%	%E% SMI"
30
31#include <sys/avl.h>
32#include <sys/zfs_context.h>
33#include <sys/nvpair.h>
34#include <sys/sysmacros.h>
35#include <sys/types.h>
36#include <sys/fs/zfs.h>
37
38#ifdef	__cplusplus
39extern "C" {
40#endif
41
42/*
43 * Forward references that lots of things need.
44 */
45typedef struct spa spa_t;
46typedef struct vdev vdev_t;
47typedef struct metaslab metaslab_t;
48typedef struct zilog zilog_t;
49typedef struct traverse_handle traverse_handle_t;
50typedef struct spa_aux_vdev spa_aux_vdev_t;
51struct dsl_pool;
52
53/*
54 * General-purpose 32-bit and 64-bit bitfield encodings.
55 */
56#define	BF32_DECODE(x, low, len)	P2PHASE((x) >> (low), 1U << (len))
57#define	BF64_DECODE(x, low, len)	P2PHASE((x) >> (low), 1ULL << (len))
58#define	BF32_ENCODE(x, low, len)	(P2PHASE((x), 1U << (len)) << (low))
59#define	BF64_ENCODE(x, low, len)	(P2PHASE((x), 1ULL << (len)) << (low))
60
61#define	BF32_GET(x, low, len)		BF32_DECODE(x, low, len)
62#define	BF64_GET(x, low, len)		BF64_DECODE(x, low, len)
63
64#define	BF32_SET(x, low, len, val)	\
65	((x) ^= BF32_ENCODE((x >> low) ^ (val), low, len))
66#define	BF64_SET(x, low, len, val)	\
67	((x) ^= BF64_ENCODE((x >> low) ^ (val), low, len))
68
69#define	BF32_GET_SB(x, low, len, shift, bias)	\
70	((BF32_GET(x, low, len) + (bias)) << (shift))
71#define	BF64_GET_SB(x, low, len, shift, bias)	\
72	((BF64_GET(x, low, len) + (bias)) << (shift))
73
74#define	BF32_SET_SB(x, low, len, shift, bias, val)	\
75	BF32_SET(x, low, len, ((val) >> (shift)) - (bias))
76#define	BF64_SET_SB(x, low, len, shift, bias, val)	\
77	BF64_SET(x, low, len, ((val) >> (shift)) - (bias))
78
79/*
80 * We currently support nine block sizes, from 512 bytes to 128K.
81 * We could go higher, but the benefits are near-zero and the cost
82 * of COWing a giant block to modify one byte would become excessive.
83 */
84#define	SPA_MINBLOCKSHIFT	9
85#define	SPA_MAXBLOCKSHIFT	17
86#define	SPA_MINBLOCKSIZE	(1ULL << SPA_MINBLOCKSHIFT)
87#define	SPA_MAXBLOCKSIZE	(1ULL << SPA_MAXBLOCKSHIFT)
88
89#define	SPA_BLOCKSIZES		(SPA_MAXBLOCKSHIFT - SPA_MINBLOCKSHIFT + 1)
90
91/*
92 * The DVA size encodings for LSIZE and PSIZE support blocks up to 32MB.
93 * The ASIZE encoding should be at least 64 times larger (6 more bits)
94 * to support up to 4-way RAID-Z mirror mode with worst-case gang block
95 * overhead, three DVAs per bp, plus one more bit in case we do anything
96 * else that expands the ASIZE.
97 */
98#define	SPA_LSIZEBITS		16	/* LSIZE up to 32M (2^16 * 512)	*/
99#define	SPA_PSIZEBITS		16	/* PSIZE up to 32M (2^16 * 512)	*/
100#define	SPA_ASIZEBITS		24	/* ASIZE up to 64 times larger	*/
101
102/*
103 * All SPA data is represented by 128-bit data virtual addresses (DVAs).
104 * The members of the dva_t should be considered opaque outside the SPA.
105 */
106typedef struct dva {
107	uint64_t	dva_word[2];
108} dva_t;
109
110/*
111 * Each block has a 256-bit checksum -- strong enough for cryptographic hashes.
112 */
113typedef struct zio_cksum {
114	uint64_t	zc_word[4];
115} zio_cksum_t;
116
117/*
118 * Each block is described by its DVAs, time of birth, checksum, etc.
119 * The word-by-word, bit-by-bit layout of the blkptr is as follows:
120 *
121 *	64	56	48	40	32	24	16	8	0
122 *	+-------+-------+-------+-------+-------+-------+-------+-------+
123 * 0	|		vdev1		| GRID  |	  ASIZE		|
124 *	+-------+-------+-------+-------+-------+-------+-------+-------+
125 * 1	|G|			 offset1				|
126 *	+-------+-------+-------+-------+-------+-------+-------+-------+
127 * 2	|		vdev2		| GRID  |	  ASIZE		|
128 *	+-------+-------+-------+-------+-------+-------+-------+-------+
129 * 3	|G|			 offset2				|
130 *	+-------+-------+-------+-------+-------+-------+-------+-------+
131 * 4	|		vdev3		| GRID  |	  ASIZE		|
132 *	+-------+-------+-------+-------+-------+-------+-------+-------+
133 * 5	|G|			 offset3				|
134 *	+-------+-------+-------+-------+-------+-------+-------+-------+
135 * 6	|E| lvl | type	| cksum | comp	|     PSIZE	|     LSIZE	|
136 *	+-------+-------+-------+-------+-------+-------+-------+-------+
137 * 7	|			padding					|
138 *	+-------+-------+-------+-------+-------+-------+-------+-------+
139 * 8	|			padding					|
140 *	+-------+-------+-------+-------+-------+-------+-------+-------+
141 * 9	|			padding					|
142 *	+-------+-------+-------+-------+-------+-------+-------+-------+
143 * a	|			birth txg				|
144 *	+-------+-------+-------+-------+-------+-------+-------+-------+
145 * b	|			fill count				|
146 *	+-------+-------+-------+-------+-------+-------+-------+-------+
147 * c	|			checksum[0]				|
148 *	+-------+-------+-------+-------+-------+-------+-------+-------+
149 * d	|			checksum[1]				|
150 *	+-------+-------+-------+-------+-------+-------+-------+-------+
151 * e	|			checksum[2]				|
152 *	+-------+-------+-------+-------+-------+-------+-------+-------+
153 * f	|			checksum[3]				|
154 *	+-------+-------+-------+-------+-------+-------+-------+-------+
155 *
156 * Legend:
157 *
158 * vdev		virtual device ID
159 * offset	offset into virtual device
160 * LSIZE	logical size
161 * PSIZE	physical size (after compression)
162 * ASIZE	allocated size (including RAID-Z parity and gang block headers)
163 * GRID		RAID-Z layout information (reserved for future use)
164 * cksum	checksum function
165 * comp		compression function
166 * G		gang block indicator
167 * E		endianness
168 * type		DMU object type
169 * lvl		level of indirection
170 * birth txg	transaction group in which the block was born
171 * fill count	number of non-zero blocks under this bp
172 * checksum[4]	256-bit checksum of the data this bp describes
173 */
174typedef struct blkptr {
175	dva_t		blk_dva[3];	/* 128-bit Data Virtual Address	*/
176	uint64_t	blk_prop;	/* size, compression, type, etc	*/
177	uint64_t	blk_pad[3];	/* Extra space for the future	*/
178	uint64_t	blk_birth;	/* transaction group at birth	*/
179	uint64_t	blk_fill;	/* fill count			*/
180	zio_cksum_t	blk_cksum;	/* 256-bit checksum		*/
181} blkptr_t;
182
183#define	SPA_BLKPTRSHIFT	7		/* blkptr_t is 128 bytes	*/
184#define	SPA_DVAS_PER_BP	3		/* Number of DVAs in a bp	*/
185
186/*
187 * Macros to get and set fields in a bp or DVA.
188 */
189#define	DVA_GET_ASIZE(dva)	\
190	BF64_GET_SB((dva)->dva_word[0], 0, 24, SPA_MINBLOCKSHIFT, 0)
191#define	DVA_SET_ASIZE(dva, x)	\
192	BF64_SET_SB((dva)->dva_word[0], 0, 24, SPA_MINBLOCKSHIFT, 0, x)
193
194#define	DVA_GET_GRID(dva)	BF64_GET((dva)->dva_word[0], 24, 8)
195#define	DVA_SET_GRID(dva, x)	BF64_SET((dva)->dva_word[0], 24, 8, x)
196
197#define	DVA_GET_VDEV(dva)	BF64_GET((dva)->dva_word[0], 32, 32)
198#define	DVA_SET_VDEV(dva, x)	BF64_SET((dva)->dva_word[0], 32, 32, x)
199
200#define	DVA_GET_OFFSET(dva)	\
201	BF64_GET_SB((dva)->dva_word[1], 0, 63, SPA_MINBLOCKSHIFT, 0)
202#define	DVA_SET_OFFSET(dva, x)	\
203	BF64_SET_SB((dva)->dva_word[1], 0, 63, SPA_MINBLOCKSHIFT, 0, x)
204
205#define	DVA_GET_GANG(dva)	BF64_GET((dva)->dva_word[1], 63, 1)
206#define	DVA_SET_GANG(dva, x)	BF64_SET((dva)->dva_word[1], 63, 1, x)
207
208#define	BP_GET_LSIZE(bp)	\
209	(BP_IS_HOLE(bp) ? 0 : \
210	BF64_GET_SB((bp)->blk_prop, 0, 16, SPA_MINBLOCKSHIFT, 1))
211#define	BP_SET_LSIZE(bp, x)	\
212	BF64_SET_SB((bp)->blk_prop, 0, 16, SPA_MINBLOCKSHIFT, 1, x)
213
214#define	BP_GET_PSIZE(bp)	\
215	BF64_GET_SB((bp)->blk_prop, 16, 16, SPA_MINBLOCKSHIFT, 1)
216#define	BP_SET_PSIZE(bp, x)	\
217	BF64_SET_SB((bp)->blk_prop, 16, 16, SPA_MINBLOCKSHIFT, 1, x)
218
219#define	BP_GET_COMPRESS(bp)	BF64_GET((bp)->blk_prop, 32, 8)
220#define	BP_SET_COMPRESS(bp, x)	BF64_SET((bp)->blk_prop, 32, 8, x)
221
222#define	BP_GET_CHECKSUM(bp)	BF64_GET((bp)->blk_prop, 40, 8)
223#define	BP_SET_CHECKSUM(bp, x)	BF64_SET((bp)->blk_prop, 40, 8, x)
224
225#define	BP_GET_TYPE(bp)		BF64_GET((bp)->blk_prop, 48, 8)
226#define	BP_SET_TYPE(bp, x)	BF64_SET((bp)->blk_prop, 48, 8, x)
227
228#define	BP_GET_LEVEL(bp)	BF64_GET((bp)->blk_prop, 56, 5)
229#define	BP_SET_LEVEL(bp, x)	BF64_SET((bp)->blk_prop, 56, 5, x)
230
231#define	BP_GET_BYTEORDER(bp)	(0 - BF64_GET((bp)->blk_prop, 63, 1))
232#define	BP_SET_BYTEORDER(bp, x)	BF64_SET((bp)->blk_prop, 63, 1, x)
233
234#define	BP_GET_ASIZE(bp)	\
235	(DVA_GET_ASIZE(&(bp)->blk_dva[0]) + DVA_GET_ASIZE(&(bp)->blk_dva[1]) + \
236		DVA_GET_ASIZE(&(bp)->blk_dva[2]))
237
238#define	BP_GET_UCSIZE(bp) \
239	((BP_GET_LEVEL(bp) > 0 || dmu_ot[BP_GET_TYPE(bp)].ot_metadata) ? \
240	BP_GET_PSIZE(bp) : BP_GET_LSIZE(bp));
241
242#define	BP_GET_NDVAS(bp)	\
243	(!!DVA_GET_ASIZE(&(bp)->blk_dva[0]) + \
244	!!DVA_GET_ASIZE(&(bp)->blk_dva[1]) + \
245	!!DVA_GET_ASIZE(&(bp)->blk_dva[2]))
246
247#define	BP_COUNT_GANG(bp)	\
248	(DVA_GET_GANG(&(bp)->blk_dva[0]) + \
249	DVA_GET_GANG(&(bp)->blk_dva[1]) + \
250	DVA_GET_GANG(&(bp)->blk_dva[2]))
251
252#define	DVA_EQUAL(dva1, dva2)	\
253	((dva1)->dva_word[1] == (dva2)->dva_word[1] && \
254	(dva1)->dva_word[0] == (dva2)->dva_word[0])
255
256#define	ZIO_CHECKSUM_EQUAL(zc1, zc2) \
257	(0 == (((zc1).zc_word[0] - (zc2).zc_word[0]) | \
258	((zc1).zc_word[1] - (zc2).zc_word[1]) | \
259	((zc1).zc_word[2] - (zc2).zc_word[2]) | \
260	((zc1).zc_word[3] - (zc2).zc_word[3])))
261
262
263#define	DVA_IS_VALID(dva)	(DVA_GET_ASIZE(dva) != 0)
264
265#define	ZIO_SET_CHECKSUM(zcp, w0, w1, w2, w3)	\
266{						\
267	(zcp)->zc_word[0] = w0;			\
268	(zcp)->zc_word[1] = w1;			\
269	(zcp)->zc_word[2] = w2;			\
270	(zcp)->zc_word[3] = w3;			\
271}
272
273#define	BP_IDENTITY(bp)		(&(bp)->blk_dva[0])
274#define	BP_IS_GANG(bp)		DVA_GET_GANG(BP_IDENTITY(bp))
275#define	BP_IS_HOLE(bp)		((bp)->blk_birth == 0)
276#define	BP_IS_OLDER(bp, txg)	(!BP_IS_HOLE(bp) && (bp)->blk_birth < (txg))
277
278#define	BP_ZERO_DVAS(bp)			\
279{						\
280	(bp)->blk_dva[0].dva_word[0] = 0;	\
281	(bp)->blk_dva[0].dva_word[1] = 0;	\
282	(bp)->blk_dva[1].dva_word[0] = 0;	\
283	(bp)->blk_dva[1].dva_word[1] = 0;	\
284	(bp)->blk_dva[2].dva_word[0] = 0;	\
285	(bp)->blk_dva[2].dva_word[1] = 0;	\
286	(bp)->blk_birth = 0;			\
287}
288
289#define	BP_ZERO(bp)				\
290{						\
291	BP_ZERO_DVAS(bp)			\
292	(bp)->blk_prop = 0;			\
293	(bp)->blk_pad[0] = 0;			\
294	(bp)->blk_pad[1] = 0;			\
295	(bp)->blk_pad[2] = 0;			\
296	(bp)->blk_fill = 0;			\
297	ZIO_SET_CHECKSUM(&(bp)->blk_cksum, 0, 0, 0, 0);	\
298}
299
300/*
301 * Note: the byteorder is either 0 or -1, both of which are palindromes.
302 * This simplifies the endianness handling a bit.
303 */
304#ifdef _BIG_ENDIAN
305#define	ZFS_HOST_BYTEORDER	(0ULL)
306#else
307#define	ZFS_HOST_BYTEORDER	(-1ULL)
308#endif
309
310#define	BP_SHOULD_BYTESWAP(bp)	(BP_GET_BYTEORDER(bp) != ZFS_HOST_BYTEORDER)
311
312#define	BP_SPRINTF_LEN	320
313
314#include <sys/dmu.h>
315
316#define	BP_GET_BUFC_TYPE(bp)						\
317	(((BP_GET_LEVEL(bp) > 0) || (dmu_ot[BP_GET_TYPE(bp)].ot_metadata)) ? \
318	ARC_BUFC_METADATA : ARC_BUFC_DATA);
319/*
320 * Routines found in spa.c
321 */
322
323/* state manipulation functions */
324extern int spa_open(const char *pool, spa_t **, void *tag);
325extern int spa_get_stats(const char *pool, nvlist_t **config,
326    char *altroot, size_t buflen);
327extern int spa_create(const char *pool, nvlist_t *config, nvlist_t *props,
328    const char *history_str);
329extern void spa_check_rootconf(char *devpath, char **the_dev_p,
330    nvlist_t **the_conf_p, uint64_t *the_txg_p);
331extern boolean_t spa_rootdev_validate(nvlist_t *nv);
332extern int spa_import_rootpool(char *devpath);
333extern int spa_import(const char *pool, nvlist_t *config, nvlist_t *props);
334extern int spa_import_faulted(const char *, nvlist_t *, nvlist_t *);
335extern nvlist_t *spa_tryimport(nvlist_t *tryconfig);
336extern int spa_destroy(char *pool);
337extern int spa_export(char *pool, nvlist_t **oldconfig);
338extern int spa_reset(char *pool);
339extern void spa_async_request(spa_t *spa, int flag);
340extern void spa_async_suspend(spa_t *spa);
341extern void spa_async_resume(spa_t *spa);
342extern spa_t *spa_inject_addref(char *pool);
343extern void spa_inject_delref(spa_t *spa);
344
345#define	SPA_ASYNC_REMOVE	0x01
346#define	SPA_ASYNC_RESILVER_DONE	0x02
347#define	SPA_ASYNC_SCRUB		0x04
348#define	SPA_ASYNC_RESILVER	0x08
349#define	SPA_ASYNC_CONFIG_UPDATE	0x10
350
351/* device manipulation */
352extern int spa_vdev_add(spa_t *spa, nvlist_t *nvroot);
353extern int spa_vdev_attach(spa_t *spa, uint64_t guid, nvlist_t *nvroot,
354    int replacing);
355extern int spa_vdev_detach(spa_t *spa, uint64_t guid, int replace_done);
356extern int spa_vdev_remove(spa_t *spa, uint64_t guid, boolean_t unspare);
357extern int spa_vdev_setpath(spa_t *spa, uint64_t guid, const char *newpath);
358
359/* spare state (which is global across all pools) */
360extern void spa_spare_add(vdev_t *vd);
361extern void spa_spare_remove(vdev_t *vd);
362extern boolean_t spa_spare_exists(uint64_t guid, uint64_t *pool);
363extern void spa_spare_activate(vdev_t *vd);
364
365/* L2ARC state (which is global across all pools) */
366extern void spa_l2cache_add(vdev_t *vd);
367extern void spa_l2cache_remove(vdev_t *vd);
368extern boolean_t spa_l2cache_exists(uint64_t guid, uint64_t *pool);
369extern void spa_l2cache_activate(vdev_t *vd);
370extern void spa_l2cache_drop(spa_t *spa);
371extern void spa_l2cache_space_update(vdev_t *vd, int64_t space, int64_t alloc);
372
373/* scrubbing */
374extern int spa_scrub(spa_t *spa, pool_scrub_type_t type, boolean_t force);
375extern void spa_scrub_suspend(spa_t *spa);
376extern void spa_scrub_resume(spa_t *spa);
377extern void spa_scrub_restart(spa_t *spa, uint64_t txg);
378
379/* spa syncing */
380extern void spa_sync(spa_t *spa, uint64_t txg); /* only for DMU use */
381extern void spa_sync_allpools(void);
382
383/*
384 * SPA configuration functions in spa_config.c
385 */
386
387#define	SPA_CONFIG_UPDATE_POOL	0
388#define	SPA_CONFIG_UPDATE_VDEVS	1
389
390extern void spa_config_sync(spa_t *, boolean_t, boolean_t);
391extern void spa_config_load(void);
392extern nvlist_t *spa_all_configs(uint64_t *);
393extern void spa_config_set(spa_t *spa, nvlist_t *config);
394extern nvlist_t *spa_config_generate(spa_t *spa, vdev_t *vd, uint64_t txg,
395    int getstats);
396extern void spa_config_update(spa_t *spa, int what);
397extern void spa_config_update_common(spa_t *spa, int what, boolean_t isroot);
398
399/*
400 * Miscellaneous SPA routines in spa_misc.c
401 */
402
403/* Namespace manipulation */
404extern spa_t *spa_lookup(const char *name);
405extern spa_t *spa_add(const char *name, const char *altroot);
406extern void spa_remove(spa_t *spa);
407extern spa_t *spa_next(spa_t *prev);
408
409/* Refcount functions */
410extern void spa_open_ref(spa_t *spa, void *tag);
411extern void spa_close(spa_t *spa, void *tag);
412extern boolean_t spa_refcount_zero(spa_t *spa);
413
414/* Pool configuration lock */
415extern void spa_config_enter(spa_t *spa, krw_t rw, void *tag);
416extern void spa_config_exit(spa_t *spa, void *tag);
417extern boolean_t spa_config_held(spa_t *spa, krw_t rw);
418
419/* Pool vdev add/remove lock */
420extern uint64_t spa_vdev_enter(spa_t *spa);
421extern int spa_vdev_exit(spa_t *spa, vdev_t *vd, uint64_t txg, int error);
422
423/* Accessor functions */
424extern krwlock_t *spa_traverse_rwlock(spa_t *spa);
425extern int spa_traverse_wanted(spa_t *spa);
426extern struct dsl_pool *spa_get_dsl(spa_t *spa);
427extern blkptr_t *spa_get_rootblkptr(spa_t *spa);
428extern void spa_set_rootblkptr(spa_t *spa, const blkptr_t *bp);
429extern void spa_altroot(spa_t *, char *, size_t);
430extern int spa_sync_pass(spa_t *spa);
431extern char *spa_name(spa_t *spa);
432extern uint64_t spa_guid(spa_t *spa);
433extern uint64_t spa_last_synced_txg(spa_t *spa);
434extern uint64_t spa_first_txg(spa_t *spa);
435extern uint64_t spa_version(spa_t *spa);
436extern int spa_state(spa_t *spa);
437extern uint64_t spa_freeze_txg(spa_t *spa);
438extern uint64_t spa_get_alloc(spa_t *spa);
439extern uint64_t spa_get_space(spa_t *spa);
440extern uint64_t spa_get_dspace(spa_t *spa);
441extern uint64_t spa_get_asize(spa_t *spa, uint64_t lsize);
442extern uint64_t spa_version(spa_t *spa);
443extern int spa_max_replication(spa_t *spa);
444extern int spa_busy(void);
445extern uint8_t spa_get_failmode(spa_t *spa);
446
447/* Miscellaneous support routines */
448extern int spa_rename(const char *oldname, const char *newname);
449extern boolean_t spa_guid_exists(uint64_t pool_guid, uint64_t device_guid);
450extern char *spa_strdup(const char *);
451extern void spa_strfree(char *);
452extern uint64_t spa_get_random(uint64_t range);
453extern void sprintf_blkptr(char *buf, int len, const blkptr_t *bp);
454extern void spa_freeze(spa_t *spa);
455extern void spa_upgrade(spa_t *spa, uint64_t version);
456extern void spa_evict_all(void);
457extern vdev_t *spa_lookup_by_guid(spa_t *spa, uint64_t guid,
458    boolean_t l2cache);
459extern boolean_t spa_has_spare(spa_t *, uint64_t guid);
460extern uint64_t bp_get_dasize(spa_t *spa, const blkptr_t *bp);
461extern boolean_t spa_has_slogs(spa_t *spa);
462
463/* history logging */
464typedef enum history_log_type {
465	LOG_CMD_POOL_CREATE,
466	LOG_CMD_NORMAL,
467	LOG_INTERNAL
468} history_log_type_t;
469
470typedef struct history_arg {
471	const char *ha_history_str;
472	history_log_type_t ha_log_type;
473	history_internal_events_t ha_event;
474	char ha_zone[MAXPATHLEN];
475} history_arg_t;
476
477extern char *spa_his_ievent_table[];
478
479extern void spa_history_create_obj(spa_t *spa, dmu_tx_t *tx);
480extern int spa_history_get(spa_t *spa, uint64_t *offset, uint64_t *len_read,
481    char *his_buf);
482extern int spa_history_log(spa_t *spa, const char *his_buf,
483    history_log_type_t what);
484void spa_history_internal_log(history_internal_events_t event, spa_t *spa,
485    dmu_tx_t *tx, cred_t *cr, const char *fmt, ...);
486
487/* error handling */
488struct zbookmark;
489struct zio;
490extern void spa_log_error(spa_t *spa, struct zio *zio);
491extern void zfs_ereport_post(const char *class, spa_t *spa, vdev_t *vd,
492    struct zio *zio, uint64_t stateoroffset, uint64_t length);
493extern void zfs_post_remove(spa_t *spa, vdev_t *vd);
494extern void zfs_post_autoreplace(spa_t *spa, vdev_t *vd);
495extern uint64_t spa_get_errlog_size(spa_t *spa);
496extern int spa_get_errlog(spa_t *spa, void *uaddr, size_t *count);
497extern void spa_errlog_rotate(spa_t *spa);
498extern void spa_errlog_drain(spa_t *spa);
499extern void spa_errlog_sync(spa_t *spa, uint64_t txg);
500extern void spa_get_errlists(spa_t *spa, avl_tree_t *last, avl_tree_t *scrub);
501
502/* vdev cache */
503extern void vdev_cache_stat_init(void);
504extern void vdev_cache_stat_fini(void);
505
506/* Initialization and termination */
507extern void spa_init(int flags);
508extern void spa_fini(void);
509extern void spa_boot_init();
510
511/* properties */
512extern int spa_prop_set(spa_t *spa, nvlist_t *nvp);
513extern int spa_prop_get(spa_t *spa, nvlist_t **nvp);
514extern void spa_prop_clear_bootfs(spa_t *spa, uint64_t obj, dmu_tx_t *tx);
515
516/* asynchronous event notification */
517extern void spa_event_notify(spa_t *spa, vdev_t *vdev, const char *name);
518
519#ifdef ZFS_DEBUG
520#define	dprintf_bp(bp, fmt, ...) do {				\
521	if (zfs_flags & ZFS_DEBUG_DPRINTF) { 			\
522	char *__blkbuf = kmem_alloc(BP_SPRINTF_LEN, KM_SLEEP);	\
523	sprintf_blkptr(__blkbuf, BP_SPRINTF_LEN, (bp));		\
524	dprintf(fmt " %s\n", __VA_ARGS__, __blkbuf);		\
525	kmem_free(__blkbuf, BP_SPRINTF_LEN);			\
526	} \
527_NOTE(CONSTCOND) } while (0)
528#else
529#define	dprintf_bp(bp, fmt, ...)
530#endif
531
532extern int spa_mode;			/* mode, e.g. FREAD | FWRITE */
533
534#ifdef	__cplusplus
535}
536#endif
537
538#endif	/* _SYS_SPA_H */
539