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Imported Upstream version 0.6.4.2
[mirror_zfs-debian.git] / include / sys / spa.h
CommitLineData
34dc7c2f
BB		 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/*
428870ff 22 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
ea04106b 23 * Copyright (c) 2011, 2014 by Delphix. All rights reserved.
3541dc6d 24 * Copyright 2011 Nexenta Systems, Inc. All rights reserved.
34dc7c2f
BB		 25 */
26
27#ifndef _SYS_SPA_H
28#define _SYS_SPA_H
29
34dc7c2f
BB		 30#include <sys/avl.h>
31#include <sys/zfs_context.h>
ea04106b 32#include <sys/kstat.h>
34dc7c2f
BB		 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;
428870ff
BB		 48typedef struct metaslab_group metaslab_group_t;
49typedef struct metaslab_class metaslab_class_t;
50typedef struct zio zio_t;
34dc7c2f 51typedef struct zilog zilog_t;
34dc7c2f 52typedef struct spa_aux_vdev spa_aux_vdev_t;
428870ff
BB		 53typedef struct ddt ddt_t;
54typedef struct ddt_entry ddt_entry_t;
ea04106b 55typedef struct zbookmark_phys zbookmark_phys_t;
a08ee875 56
34dc7c2f 57struct dsl_pool;
a08ee875 58struct dsl_dataset;
34dc7c2f
BB		 59
60/*
61 * General-purpose 32-bit and 64-bit bitfield encodings.
62 */
63#define BF32_DECODE(x, low, len) P2PHASE((x) >> (low), 1U << (len))
64#define BF64_DECODE(x, low, len) P2PHASE((x) >> (low), 1ULL << (len))
65#define BF32_ENCODE(x, low, len) (P2PHASE((x), 1U << (len)) << (low))
66#define BF64_ENCODE(x, low, len) (P2PHASE((x), 1ULL << (len)) << (low))
67
68#define BF32_GET(x, low, len) BF32_DECODE(x, low, len)
69#define BF64_GET(x, low, len) BF64_DECODE(x, low, len)
70
ea04106b
AX		 71#define BF32_SET(x, low, len, val) do { \
72 ASSERT3U(val, <, 1U << (len)); \
73 ASSERT3U(low + len, <=, 32); \
74 (x) ^= BF32_ENCODE((x >> low) ^ (val), low, len); \
75_NOTE(CONSTCOND) } while (0)
76
77#define BF64_SET(x, low, len, val) do { \
78 ASSERT3U(val, <, 1ULL << (len)); \
79 ASSERT3U(low + len, <=, 64); \
80 ((x) ^= BF64_ENCODE((x >> low) ^ (val), low, len)); \
81_NOTE(CONSTCOND) } while (0)
34dc7c2f
BB		 82
83#define BF32_GET_SB(x, low, len, shift, bias) \
84 ((BF32_GET(x, low, len) + (bias)) << (shift))
85#define BF64_GET_SB(x, low, len, shift, bias) \
86 ((BF64_GET(x, low, len) + (bias)) << (shift))
87
ea04106b
AX		 88#define BF32_SET_SB(x, low, len, shift, bias, val) do { \
89 ASSERT(IS_P2ALIGNED(val, 1U << shift)); \
90 ASSERT3S((val) >> (shift), >=, bias); \
91 BF32_SET(x, low, len, ((val) >> (shift)) - (bias)); \
92_NOTE(CONSTCOND) } while (0)
93#define BF64_SET_SB(x, low, len, shift, bias, val) do { \
94 ASSERT(IS_P2ALIGNED(val, 1ULL << shift)); \
95 ASSERT3S((val) >> (shift), >=, bias); \
96 BF64_SET(x, low, len, ((val) >> (shift)) - (bias)); \
97_NOTE(CONSTCOND) } while (0)
34dc7c2f
BB		 98
99/*
100 * We currently support nine block sizes, from 512 bytes to 128K.
101 * We could go higher, but the benefits are near-zero and the cost
102 * of COWing a giant block to modify one byte would become excessive.
103 */
104#define SPA_MINBLOCKSHIFT 9
105#define SPA_MAXBLOCKSHIFT 17
106#define SPA_MINBLOCKSIZE (1ULL << SPA_MINBLOCKSHIFT)
107#define SPA_MAXBLOCKSIZE (1ULL << SPA_MAXBLOCKSHIFT)
108
109#define SPA_BLOCKSIZES (SPA_MAXBLOCKSHIFT - SPA_MINBLOCKSHIFT + 1)
110
b128c09f
BB		 111/*
112 * Size of block to hold the configuration data (a packed nvlist)
113 */
9ae529ec 114#define SPA_CONFIG_BLOCKSIZE (1ULL << 14)
b128c09f 115
34dc7c2f
BB		 116/*
117 * The DVA size encodings for LSIZE and PSIZE support blocks up to 32MB.
118 * The ASIZE encoding should be at least 64 times larger (6 more bits)
119 * to support up to 4-way RAID-Z mirror mode with worst-case gang block
120 * overhead, three DVAs per bp, plus one more bit in case we do anything
121 * else that expands the ASIZE.
122 */
123#define SPA_LSIZEBITS 16 /* LSIZE up to 32M (2^16 * 512) */
124#define SPA_PSIZEBITS 16 /* PSIZE up to 32M (2^16 * 512) */
125#define SPA_ASIZEBITS 24 /* ASIZE up to 64 times larger */
126
127/*
128 * All SPA data is represented by 128-bit data virtual addresses (DVAs).
129 * The members of the dva_t should be considered opaque outside the SPA.
130 */
131typedef struct dva {
132 uint64_t dva_word[2];
133} dva_t;
134
135/*
136 * Each block has a 256-bit checksum -- strong enough for cryptographic hashes.
137 */
138typedef struct zio_cksum {
139 uint64_t zc_word[4];
140} zio_cksum_t;
141
142/*
143 * Each block is described by its DVAs, time of birth, checksum, etc.
144 * The word-by-word, bit-by-bit layout of the blkptr is as follows:
145 *
146 * 64 56 48 40 32 24 16 8 0
147 * +-------+-------+-------+-------+-------+-------+-------+-------+
148 * 0 | vdev1 | GRID | ASIZE |
149 * +-------+-------+-------+-------+-------+-------+-------+-------+
150 * 1 |G| offset1 |
151 * +-------+-------+-------+-------+-------+-------+-------+-------+
152 * 2 | vdev2 | GRID | ASIZE |
153 * +-------+-------+-------+-------+-------+-------+-------+-------+
154 * 3 |G| offset2 |
155 * +-------+-------+-------+-------+-------+-------+-------+-------+
156 * 4 | vdev3 | GRID | ASIZE |
157 * +-------+-------+-------+-------+-------+-------+-------+-------+
158 * 5 |G| offset3 |
159 * +-------+-------+-------+-------+-------+-------+-------+-------+
ea04106b 160 * 6 |BDX|lvl| type | cksum |E| comp| PSIZE | LSIZE |
34dc7c2f
BB		 161 * +-------+-------+-------+-------+-------+-------+-------+-------+
162 * 7 | padding |
163 * +-------+-------+-------+-------+-------+-------+-------+-------+
164 * 8 | padding |
165 * +-------+-------+-------+-------+-------+-------+-------+-------+
428870ff 166 * 9 | physical birth txg |
34dc7c2f 167 * +-------+-------+-------+-------+-------+-------+-------+-------+
428870ff 168 * a | logical birth txg |
34dc7c2f
BB		 169 * +-------+-------+-------+-------+-------+-------+-------+-------+
170 * b | fill count |
171 * +-------+-------+-------+-------+-------+-------+-------+-------+
172 * c | checksum[0] |
173 * +-------+-------+-------+-------+-------+-------+-------+-------+
174 * d | checksum[1] |
175 * +-------+-------+-------+-------+-------+-------+-------+-------+
176 * e | checksum[2] |
177 * +-------+-------+-------+-------+-------+-------+-------+-------+
178 * f | checksum[3] |
179 * +-------+-------+-------+-------+-------+-------+-------+-------+
180 *
181 * Legend:
182 *
183 * vdev virtual device ID
184 * offset offset into virtual device
185 * LSIZE logical size
186 * PSIZE physical size (after compression)
187 * ASIZE allocated size (including RAID-Z parity and gang block headers)
188 * GRID RAID-Z layout information (reserved for future use)
189 * cksum checksum function
190 * comp compression function
191 * G gang block indicator
428870ff
BB		 192 * B byteorder (endianness)
193 * D dedup
ea04106b
AX		 194 * X encryption (on version 30, which is not supported)
195 * E blkptr_t contains embedded data (see below)
34dc7c2f 196 * lvl level of indirection
428870ff
BB		 197 * type DMU object type
198 * phys birth txg of block allocation; zero if same as logical birth txg
199 * log. birth transaction group in which the block was logically born
34dc7c2f
BB		 200 * fill count number of non-zero blocks under this bp
201 * checksum[4] 256-bit checksum of the data this bp describes
202 */
ea04106b
AX		 203
204/*
205 * "Embedded" blkptr_t's don't actually point to a block, instead they
206 * have a data payload embedded in the blkptr_t itself. See the comment
207 * in blkptr.c for more details.
208 *
209 * The blkptr_t is laid out as follows:
210 *
211 * 64 56 48 40 32 24 16 8 0
212 * +-------+-------+-------+-------+-------+-------+-------+-------+
213 * 0 | payload |
214 * 1 | payload |
215 * 2 | payload |
216 * 3 | payload |
217 * 4 | payload |
218 * 5 | payload |
219 * +-------+-------+-------+-------+-------+-------+-------+-------+
220 * 6 |BDX|lvl| type | etype |E| comp| PSIZE| LSIZE |
221 * +-------+-------+-------+-------+-------+-------+-------+-------+
222 * 7 | payload |
223 * 8 | payload |
224 * 9 | payload |
225 * +-------+-------+-------+-------+-------+-------+-------+-------+
226 * a | logical birth txg |
227 * +-------+-------+-------+-------+-------+-------+-------+-------+
228 * b | payload |
229 * c | payload |
230 * d | payload |
231 * e | payload |
232 * f | payload |
233 * +-------+-------+-------+-------+-------+-------+-------+-------+
234 *
235 * Legend:
236 *
237 * payload contains the embedded data
238 * B (byteorder) byteorder (endianness)
239 * D (dedup) padding (set to zero)
240 * X encryption (set to zero; see above)
241 * E (embedded) set to one
242 * lvl indirection level
243 * type DMU object type
244 * etype how to interpret embedded data (BP_EMBEDDED_TYPE_*)
245 * comp compression function of payload
246 * PSIZE size of payload after compression, in bytes
247 * LSIZE logical size of payload, in bytes
248 * note that 25 bits is enough to store the largest
249 * "normal" BP's LSIZE (2^16 * 2^9) in bytes
250 * log. birth transaction group in which the block was logically born
251 *
252 * Note that LSIZE and PSIZE are stored in bytes, whereas for non-embedded
253 * bp's they are stored in units of SPA_MINBLOCKSHIFT.
254 * Generally, the generic BP_GET_*() macros can be used on embedded BP's.
255 * The B, D, X, lvl, type, and comp fields are stored the same as with normal
256 * BP's so the BP_SET_* macros can be used with them. etype, PSIZE, LSIZE must
257 * be set with the BPE_SET_* macros. BP_SET_EMBEDDED() should be called before
258 * other macros, as they assert that they are only used on BP's of the correct
259 * "embedded-ness".
260 */
261
262#define BPE_GET_ETYPE(bp) \
263 (ASSERT(BP_IS_EMBEDDED(bp)), \
264 BF64_GET((bp)->blk_prop, 40, 8))
265#define BPE_SET_ETYPE(bp, t) do { \
266 ASSERT(BP_IS_EMBEDDED(bp)); \
267 BF64_SET((bp)->blk_prop, 40, 8, t); \
268_NOTE(CONSTCOND) } while (0)
269
270#define BPE_GET_LSIZE(bp) \
271 (ASSERT(BP_IS_EMBEDDED(bp)), \
272 BF64_GET_SB((bp)->blk_prop, 0, 25, 0, 1))
273#define BPE_SET_LSIZE(bp, x) do { \
274 ASSERT(BP_IS_EMBEDDED(bp)); \
275 BF64_SET_SB((bp)->blk_prop, 0, 25, 0, 1, x); \
276_NOTE(CONSTCOND) } while (0)
277
278#define BPE_GET_PSIZE(bp) \
279 (ASSERT(BP_IS_EMBEDDED(bp)), \
280 BF64_GET_SB((bp)->blk_prop, 25, 7, 0, 1))
281#define BPE_SET_PSIZE(bp, x) do { \
282 ASSERT(BP_IS_EMBEDDED(bp)); \
283 BF64_SET_SB((bp)->blk_prop, 25, 7, 0, 1, x); \
284_NOTE(CONSTCOND) } while (0)
285
286typedef enum bp_embedded_type {
287 BP_EMBEDDED_TYPE_DATA,
288 BP_EMBEDDED_TYPE_RESERVED, /* Reserved for an unintegrated feature. */
289 NUM_BP_EMBEDDED_TYPES = BP_EMBEDDED_TYPE_RESERVED
290} bp_embedded_type_t;
291
292#define BPE_NUM_WORDS 14
293#define BPE_PAYLOAD_SIZE (BPE_NUM_WORDS * sizeof (uint64_t))
294#define BPE_IS_PAYLOADWORD(bp, wp) \
295 ((wp) != &(bp)->blk_prop && (wp) != &(bp)->blk_birth)
296
34dc7c2f
BB		 297#define SPA_BLKPTRSHIFT 7 /* blkptr_t is 128 bytes */
298#define SPA_DVAS_PER_BP 3 /* Number of DVAs in a bp */
299
ea04106b
AX		 300/*
301 * A block is a hole when it has either 1) never been written to, or
302 * 2) is zero-filled. In both cases, ZFS can return all zeroes for all reads
303 * without physically allocating disk space. Holes are represented in the
304 * blkptr_t structure by zeroed blk_dva. Correct checking for holes is
305 * done through the BP_IS_HOLE macro. For holes, the logical size, level,
306 * DMU object type, and birth times are all also stored for holes that
307 * were written to at some point (i.e. were punched after having been filled).
308 */
428870ff
BB		 309typedef struct blkptr {
310 dva_t blk_dva[SPA_DVAS_PER_BP]; /* Data Virtual Addresses */
311 uint64_t blk_prop; /* size, compression, type, etc */
312 uint64_t blk_pad[2]; /* Extra space for the future */
313 uint64_t blk_phys_birth; /* txg when block was allocated */
314 uint64_t blk_birth; /* transaction group at birth */
315 uint64_t blk_fill; /* fill count */
316 zio_cksum_t blk_cksum; /* 256-bit checksum */
317} blkptr_t;
318
34dc7c2f
BB		 319/*
320 * Macros to get and set fields in a bp or DVA.
321 */
322#define DVA_GET_ASIZE(dva) \
ea04106b 323 BF64_GET_SB((dva)->dva_word[0], 0, SPA_ASIZEBITS, SPA_MINBLOCKSHIFT, 0)
34dc7c2f 324#define DVA_SET_ASIZE(dva, x) \
ea04106b
AX		 325 BF64_SET_SB((dva)->dva_word[0], 0, SPA_ASIZEBITS, \
326 SPA_MINBLOCKSHIFT, 0, x)
34dc7c2f
BB		 327
328#define DVA_GET_GRID(dva) BF64_GET((dva)->dva_word[0], 24, 8)
329#define DVA_SET_GRID(dva, x) BF64_SET((dva)->dva_word[0], 24, 8, x)
330
331#define DVA_GET_VDEV(dva) BF64_GET((dva)->dva_word[0], 32, 32)
332#define DVA_SET_VDEV(dva, x) BF64_SET((dva)->dva_word[0], 32, 32, x)
333
334#define DVA_GET_OFFSET(dva) \
335 BF64_GET_SB((dva)->dva_word[1], 0, 63, SPA_MINBLOCKSHIFT, 0)
336#define DVA_SET_OFFSET(dva, x) \
337 BF64_SET_SB((dva)->dva_word[1], 0, 63, SPA_MINBLOCKSHIFT, 0, x)
338
339#define DVA_GET_GANG(dva) BF64_GET((dva)->dva_word[1], 63, 1)
340#define DVA_SET_GANG(dva, x) BF64_SET((dva)->dva_word[1], 63, 1, x)
341
342#define BP_GET_LSIZE(bp) \
ea04106b
AX		 343 (BP_IS_EMBEDDED(bp) ? \
344 (BPE_GET_ETYPE(bp) == BP_EMBEDDED_TYPE_DATA ? BPE_GET_LSIZE(bp) : 0): \
345 BF64_GET_SB((bp)->blk_prop, 0, SPA_LSIZEBITS, SPA_MINBLOCKSHIFT, 1))
346#define BP_SET_LSIZE(bp, x) do { \
347 ASSERT(!BP_IS_EMBEDDED(bp)); \
348 BF64_SET_SB((bp)->blk_prop, \
349 0, SPA_LSIZEBITS, SPA_MINBLOCKSHIFT, 1, x); \
350_NOTE(CONSTCOND) } while (0)
34dc7c2f
BB		 351
352#define BP_GET_PSIZE(bp) \
ea04106b
AX		 353 (BP_IS_EMBEDDED(bp) ? 0 : \
354 BF64_GET_SB((bp)->blk_prop, 16, SPA_PSIZEBITS, SPA_MINBLOCKSHIFT, 1))
355#define BP_SET_PSIZE(bp, x) do { \
356 ASSERT(!BP_IS_EMBEDDED(bp)); \
357 BF64_SET_SB((bp)->blk_prop, \
358 16, SPA_PSIZEBITS, SPA_MINBLOCKSHIFT, 1, x); \
359_NOTE(CONSTCOND) } while (0)
360
361#define BP_GET_COMPRESS(bp) BF64_GET((bp)->blk_prop, 32, 7)
362#define BP_SET_COMPRESS(bp, x) BF64_SET((bp)->blk_prop, 32, 7, x)
34dc7c2f 363
ea04106b
AX		 364#define BP_IS_EMBEDDED(bp) BF64_GET((bp)->blk_prop, 39, 1)
365#define BP_SET_EMBEDDED(bp, x) BF64_SET((bp)->blk_prop, 39, 1, x)
428870ff 366
ea04106b
AX		 367#define BP_GET_CHECKSUM(bp) \
368 (BP_IS_EMBEDDED(bp) ? ZIO_CHECKSUM_OFF : \
369 BF64_GET((bp)->blk_prop, 40, 8))
370#define BP_SET_CHECKSUM(bp, x) do { \
371 ASSERT(!BP_IS_EMBEDDED(bp)); \
372 BF64_SET((bp)->blk_prop, 40, 8, x); \
373_NOTE(CONSTCOND) } while (0)
34dc7c2f 374
428870ff
BB		 375#define BP_GET_TYPE(bp) BF64_GET((bp)->blk_prop, 48, 8)
376#define BP_SET_TYPE(bp, x) BF64_SET((bp)->blk_prop, 48, 8, x)
34dc7c2f 377
428870ff
BB		 378#define BP_GET_LEVEL(bp) BF64_GET((bp)->blk_prop, 56, 5)
379#define BP_SET_LEVEL(bp, x) BF64_SET((bp)->blk_prop, 56, 5, x)
34dc7c2f 380
428870ff
BB		 381#define BP_GET_DEDUP(bp) BF64_GET((bp)->blk_prop, 62, 1)
382#define BP_SET_DEDUP(bp, x) BF64_SET((bp)->blk_prop, 62, 1, x)
383
ea04106b 384#define BP_GET_BYTEORDER(bp) BF64_GET((bp)->blk_prop, 63, 1)
428870ff
BB		 385#define BP_SET_BYTEORDER(bp, x) BF64_SET((bp)->blk_prop, 63, 1, x)
386
387#define BP_PHYSICAL_BIRTH(bp) \
ea04106b
AX		 388 (BP_IS_EMBEDDED(bp) ? 0 : \
389 (bp)->blk_phys_birth ? (bp)->blk_phys_birth : (bp)->blk_birth)
428870ff
BB		 390
391#define BP_SET_BIRTH(bp, logical, physical) \
392{ \
ea04106b 393 ASSERT(!BP_IS_EMBEDDED(bp)); \
428870ff
BB		 394 (bp)->blk_birth = (logical); \
395 (bp)->blk_phys_birth = ((logical) == (physical) ? 0 : (physical)); \
396}
34dc7c2f 397
ea04106b
AX		 398#define BP_GET_FILL(bp) (BP_IS_EMBEDDED(bp) ? 1 : (bp)->blk_fill)
399
34dc7c2f 400#define BP_GET_ASIZE(bp) \
ea04106b
AX		 401 (BP_IS_EMBEDDED(bp) ? 0 : \
402 DVA_GET_ASIZE(&(bp)->blk_dva[0]) + \
403 DVA_GET_ASIZE(&(bp)->blk_dva[1]) + \
404 DVA_GET_ASIZE(&(bp)->blk_dva[2]))
34dc7c2f
BB		 405
406#define BP_GET_UCSIZE(bp) \
9ae529ec 407 ((BP_GET_LEVEL(bp) > 0 || DMU_OT_IS_METADATA(BP_GET_TYPE(bp))) ? \
428870ff 408 BP_GET_PSIZE(bp) : BP_GET_LSIZE(bp))
34dc7c2f
BB		 409
410#define BP_GET_NDVAS(bp) \
ea04106b
AX		 411 (BP_IS_EMBEDDED(bp) ? 0 : \
412 !!DVA_GET_ASIZE(&(bp)->blk_dva[0]) + \
34dc7c2f
BB		 413 !!DVA_GET_ASIZE(&(bp)->blk_dva[1]) + \
414 !!DVA_GET_ASIZE(&(bp)->blk_dva[2]))
415
416#define BP_COUNT_GANG(bp) \
ea04106b 417 (BP_IS_EMBEDDED(bp) ? 0 : \
34dc7c2f
BB		 418 (DVA_GET_GANG(&(bp)->blk_dva[0]) + \
419 DVA_GET_GANG(&(bp)->blk_dva[1]) + \
ea04106b 420 DVA_GET_GANG(&(bp)->blk_dva[2])))
34dc7c2f
BB		 421
422#define DVA_EQUAL(dva1, dva2) \
423 ((dva1)->dva_word[1] == (dva2)->dva_word[1] && \
424 (dva1)->dva_word[0] == (dva2)->dva_word[0])
425
428870ff
BB		 426#define BP_EQUAL(bp1, bp2) \
427 (BP_PHYSICAL_BIRTH(bp1) == BP_PHYSICAL_BIRTH(bp2) && \
ea04106b 428 (bp1)->blk_birth == (bp2)->blk_birth && \
428870ff
BB		 429 DVA_EQUAL(&(bp1)->blk_dva[0], &(bp2)->blk_dva[0]) && \
430 DVA_EQUAL(&(bp1)->blk_dva[1], &(bp2)->blk_dva[1]) && \
431 DVA_EQUAL(&(bp1)->blk_dva[2], &(bp2)->blk_dva[2]))
432
34dc7c2f
BB		 433#define ZIO_CHECKSUM_EQUAL(zc1, zc2) \
434 (0 == (((zc1).zc_word[0] - (zc2).zc_word[0]) | \
435 ((zc1).zc_word[1] - (zc2).zc_word[1]) | \
436 ((zc1).zc_word[2] - (zc2).zc_word[2]) | \
437 ((zc1).zc_word[3] - (zc2).zc_word[3])))
438
34dc7c2f
BB		 439#define DVA_IS_VALID(dva) (DVA_GET_ASIZE(dva) != 0)
440
441#define ZIO_SET_CHECKSUM(zcp, w0, w1, w2, w3) \
442{ \
443 (zcp)->zc_word[0] = w0; \
444 (zcp)->zc_word[1] = w1; \
445 (zcp)->zc_word[2] = w2; \
446 (zcp)->zc_word[3] = w3; \
447}
448
ea04106b
AX		 449#define BP_IDENTITY(bp) (ASSERT(!BP_IS_EMBEDDED(bp)), &(bp)->blk_dva[0])
450#define BP_IS_GANG(bp) \
451 (BP_IS_EMBEDDED(bp) ? B_FALSE : DVA_GET_GANG(BP_IDENTITY(bp)))
452#define DVA_IS_EMPTY(dva) ((dva)->dva_word[0] == 0ULL && \
453 (dva)->dva_word[1] == 0ULL)
454#define BP_IS_HOLE(bp) \
455 (!BP_IS_EMBEDDED(bp) && DVA_IS_EMPTY(BP_IDENTITY(bp)))
428870ff
BB		 456
457/* BP_IS_RAIDZ(bp) assumes no block compression */
458#define BP_IS_RAIDZ(bp) (DVA_GET_ASIZE(&(bp)->blk_dva[0]) > \
459 BP_GET_PSIZE(bp))
34dc7c2f 460
b128c09f 461#define BP_ZERO(bp) \
34dc7c2f
BB		 462{ \
463 (bp)->blk_dva[0].dva_word[0] = 0; \
464 (bp)->blk_dva[0].dva_word[1] = 0; \
465 (bp)->blk_dva[1].dva_word[0] = 0; \
466 (bp)->blk_dva[1].dva_word[1] = 0; \
467 (bp)->blk_dva[2].dva_word[0] = 0; \
468 (bp)->blk_dva[2].dva_word[1] = 0; \
34dc7c2f
BB		 469 (bp)->blk_prop = 0; \
470 (bp)->blk_pad[0] = 0; \
471 (bp)->blk_pad[1] = 0; \
428870ff 472 (bp)->blk_phys_birth = 0; \
b128c09f 473 (bp)->blk_birth = 0; \
34dc7c2f
BB		 474 (bp)->blk_fill = 0; \
475 ZIO_SET_CHECKSUM(&(bp)->blk_cksum, 0, 0, 0, 0); \
476}
477
34dc7c2f
BB		 478#ifdef _BIG_ENDIAN
479#define ZFS_HOST_BYTEORDER (0ULL)
480#else
ea04106b 481#define ZFS_HOST_BYTEORDER (1ULL)
34dc7c2f
BB		 482#endif
483
484#define BP_SHOULD_BYTESWAP(bp) (BP_GET_BYTEORDER(bp) != ZFS_HOST_BYTEORDER)
485
486#define BP_SPRINTF_LEN 320
487
428870ff
BB		 488/*
489 * This macro allows code sharing between zfs, libzpool, and mdb.
490 * 'func' is either snprintf() or mdb_snprintf().
491 * 'ws' (whitespace) can be ' ' for single-line format, '\n' for multi-line.
492 */
ea04106b 493#define SNPRINTF_BLKPTR(func, ws, buf, size, bp, type, checksum, compress) \
428870ff
BB		 494{ \
495 static const char *copyname[] = \
496 { "zero", "single", "double", "triple" }; \
428870ff
BB		 497 int len = 0; \
498 int copies = 0; \
d6320ddb 499 int d; \
428870ff
BB		 500 \
501 if (bp == NULL) { \
ea04106b 502 len += func(buf + len, size - len, "<NULL>"); \
428870ff 503 } else if (BP_IS_HOLE(bp)) { \
ea04106b
AX		 504 len += func(buf + len, size - len, \
505 "HOLE [L%llu %s] " \
506 "size=%llxL birth=%lluL", \
507 (u_longlong_t)BP_GET_LEVEL(bp), \
508 type, \
509 (u_longlong_t)BP_GET_LSIZE(bp), \
510 (u_longlong_t)bp->blk_birth); \
511 } else if (BP_IS_EMBEDDED(bp)) { \
512 len = func(buf + len, size - len, \
513 "EMBEDDED [L%llu %s] et=%u %s " \
514 "size=%llxL/%llxP birth=%lluL", \
515 (u_longlong_t)BP_GET_LEVEL(bp), \
516 type, \
517 (int)BPE_GET_ETYPE(bp), \
518 compress, \
519 (u_longlong_t)BPE_GET_LSIZE(bp), \
520 (u_longlong_t)BPE_GET_PSIZE(bp), \
521 (u_longlong_t)bp->blk_birth); \
428870ff 522 } else { \
d6320ddb 523 for (d = 0; d < BP_GET_NDVAS(bp); d++) { \
428870ff
BB		 524 const dva_t *dva = &bp->blk_dva[d]; \
525 if (DVA_IS_VALID(dva)) \
526 copies++; \
527 len += func(buf + len, size - len, \
528 "DVA[%d]=<%llu:%llx:%llx>%c", d, \
529 (u_longlong_t)DVA_GET_VDEV(dva), \
530 (u_longlong_t)DVA_GET_OFFSET(dva), \
531 (u_longlong_t)DVA_GET_ASIZE(dva), \
532 ws); \
533 } \
534 if (BP_IS_GANG(bp) && \
535 DVA_GET_ASIZE(&bp->blk_dva[2]) <= \
536 DVA_GET_ASIZE(&bp->blk_dva[1]) / 2) \
537 copies--; \
538 len += func(buf + len, size - len, \
539 "[L%llu %s] %s %s %s %s %s %s%c" \
540 "size=%llxL/%llxP birth=%lluL/%lluP fill=%llu%c" \
541 "cksum=%llx:%llx:%llx:%llx", \
542 (u_longlong_t)BP_GET_LEVEL(bp), \
543 type, \
544 checksum, \
545 compress, \
546 BP_GET_BYTEORDER(bp) == 0 ? "BE" : "LE", \
547 BP_IS_GANG(bp) ? "gang" : "contiguous", \
548 BP_GET_DEDUP(bp) ? "dedup" : "unique", \
549 copyname[copies], \
550 ws, \
551 (u_longlong_t)BP_GET_LSIZE(bp), \
552 (u_longlong_t)BP_GET_PSIZE(bp), \
553 (u_longlong_t)bp->blk_birth, \
554 (u_longlong_t)BP_PHYSICAL_BIRTH(bp), \
ea04106b 555 (u_longlong_t)BP_GET_FILL(bp), \
428870ff
BB		 556 ws, \
557 (u_longlong_t)bp->blk_cksum.zc_word[0], \
558 (u_longlong_t)bp->blk_cksum.zc_word[1], \
559 (u_longlong_t)bp->blk_cksum.zc_word[2], \
560 (u_longlong_t)bp->blk_cksum.zc_word[3]); \
561 } \
562 ASSERT(len < size); \
563}
564
34dc7c2f
BB		 565#include <sys/dmu.h>
566
567#define BP_GET_BUFC_TYPE(bp) \
9ae529ec
CS		 568 (((BP_GET_LEVEL(bp) > 0) || (DMU_OT_IS_METADATA(BP_GET_TYPE(bp)))) ? \
569 ARC_BUFC_METADATA : ARC_BUFC_DATA)
428870ff
BB		 570
571typedef enum spa_import_type {
572 SPA_IMPORT_EXISTING,
573 SPA_IMPORT_ASSEMBLE
574} spa_import_type_t;
34dc7c2f
BB		 575
576/* state manipulation functions */
577extern int spa_open(const char *pool, spa_t **, void *tag);
428870ff
BB		 578extern int spa_open_rewind(const char *pool, spa_t **, void *tag,
579 nvlist_t *policy, nvlist_t **config);
9ae529ec
CS		 580extern int spa_get_stats(const char *pool, nvlist_t **config, char *altroot,
581 size_t buflen);
34dc7c2f 582extern int spa_create(const char *pool, nvlist_t *config, nvlist_t *props,
a08ee875 583 nvlist_t *zplprops);
b128c09f 584extern int spa_import_rootpool(char *devpath, char *devid);
a08ee875 585extern int spa_import(char *pool, nvlist_t *config, nvlist_t *props,
572e2857 586 uint64_t flags);
34dc7c2f
BB		 587extern nvlist_t *spa_tryimport(nvlist_t *tryconfig);
588extern int spa_destroy(char *pool);
fb5f0bc8
BB		 589extern int spa_export(char *pool, nvlist_t **oldconfig, boolean_t force,
590 boolean_t hardforce);
34dc7c2f
BB		 591extern int spa_reset(char *pool);
592extern void spa_async_request(spa_t *spa, int flag);
b128c09f 593extern void spa_async_unrequest(spa_t *spa, int flag);
34dc7c2f
BB		 594extern void spa_async_suspend(spa_t *spa);
595extern void spa_async_resume(spa_t *spa);
596extern spa_t *spa_inject_addref(char *pool);
597extern void spa_inject_delref(spa_t *spa);
428870ff
BB		 598extern void spa_scan_stat_init(spa_t *spa);
599extern int spa_scan_get_stats(spa_t *spa, pool_scan_stat_t *ps);
34dc7c2f 600
b128c09f
BB		 601#define SPA_ASYNC_CONFIG_UPDATE 0x01
602#define SPA_ASYNC_REMOVE 0x02
603#define SPA_ASYNC_PROBE 0x04
604#define SPA_ASYNC_RESILVER_DONE 0x08
605#define SPA_ASYNC_RESILVER 0x10
9babb374 606#define SPA_ASYNC_AUTOEXPAND 0x20
428870ff
BB		 607#define SPA_ASYNC_REMOVE_DONE 0x40
608#define SPA_ASYNC_REMOVE_STOP 0x80
609
610/*
611 * Controls the behavior of spa_vdev_remove().
612 */
613#define SPA_REMOVE_UNSPARE 0x01
614#define SPA_REMOVE_DONE 0x02
34dc7c2f
BB		 615
616/* device manipulation */
617extern int spa_vdev_add(spa_t *spa, nvlist_t *nvroot);
618extern int spa_vdev_attach(spa_t *spa, uint64_t guid, nvlist_t *nvroot,
619 int replacing);
fb5f0bc8
BB		 620extern int spa_vdev_detach(spa_t *spa, uint64_t guid, uint64_t pguid,
621 int replace_done);
34dc7c2f 622extern int spa_vdev_remove(spa_t *spa, uint64_t guid, boolean_t unspare);
428870ff 623extern boolean_t spa_vdev_remove_active(spa_t *spa);
34dc7c2f 624extern int spa_vdev_setpath(spa_t *spa, uint64_t guid, const char *newpath);
9babb374 625extern int spa_vdev_setfru(spa_t *spa, uint64_t guid, const char *newfru);
428870ff
BB		 626extern int spa_vdev_split_mirror(spa_t *spa, char *newname, nvlist_t *config,
627 nvlist_t *props, boolean_t exp);
34dc7c2f
BB		 628
629/* spare state (which is global across all pools) */
630extern void spa_spare_add(vdev_t *vd);
631extern void spa_spare_remove(vdev_t *vd);
b128c09f 632extern boolean_t spa_spare_exists(uint64_t guid, uint64_t *pool, int *refcnt);
34dc7c2f
BB		 633extern void spa_spare_activate(vdev_t *vd);
634
635/* L2ARC state (which is global across all pools) */
636extern void spa_l2cache_add(vdev_t *vd);
637extern void spa_l2cache_remove(vdev_t *vd);
638extern boolean_t spa_l2cache_exists(uint64_t guid, uint64_t *pool);
639extern void spa_l2cache_activate(vdev_t *vd);
640extern void spa_l2cache_drop(spa_t *spa);
34dc7c2f 641
428870ff
BB		 642/* scanning */
643extern int spa_scan(spa_t *spa, pool_scan_func_t func);
644extern int spa_scan_stop(spa_t *spa);
34dc7c2f
BB		 645
646/* spa syncing */
647extern void spa_sync(spa_t *spa, uint64_t txg); /* only for DMU use */
648extern void spa_sync_allpools(void);
649
c06d4368 650extern int zfs_sync_pass_deferred_free;
428870ff 651
b128c09f
BB		 652/* spa namespace global mutex */
653extern kmutex_t spa_namespace_lock;
654
34dc7c2f
BB		 655/*
656 * SPA configuration functions in spa_config.c
657 */
658
659#define SPA_CONFIG_UPDATE_POOL 0
660#define SPA_CONFIG_UPDATE_VDEVS 1
661
b128c09f 662extern void spa_config_sync(spa_t *, boolean_t, boolean_t);
34dc7c2f
BB		 663extern void spa_config_load(void);
664extern nvlist_t *spa_all_configs(uint64_t *);
665extern void spa_config_set(spa_t *spa, nvlist_t *config);
666extern nvlist_t *spa_config_generate(spa_t *spa, vdev_t *vd, uint64_t txg,
667 int getstats);
668extern void spa_config_update(spa_t *spa, int what);
34dc7c2f
BB		 669
670/*
671 * Miscellaneous SPA routines in spa_misc.c
672 */
673
674/* Namespace manipulation */
675extern spa_t *spa_lookup(const char *name);
428870ff 676extern spa_t *spa_add(const char *name, nvlist_t *config, const char *altroot);
34dc7c2f
BB		 677extern void spa_remove(spa_t *spa);
678extern spa_t *spa_next(spa_t *prev);
679
680/* Refcount functions */
681extern void spa_open_ref(spa_t *spa, void *tag);
682extern void spa_close(spa_t *spa, void *tag);
683extern boolean_t spa_refcount_zero(spa_t *spa);
684
428870ff 685#define SCL_NONE 0x00
b128c09f
BB		 686#define SCL_CONFIG 0x01
687#define SCL_STATE 0x02
688#define SCL_L2ARC 0x04 /* hack until L2ARC 2.0 */
689#define SCL_ALLOC 0x08
690#define SCL_ZIO 0x10
691#define SCL_FREE 0x20
692#define SCL_VDEV 0x40
693#define SCL_LOCKS 7
694#define SCL_ALL ((1 << SCL_LOCKS) - 1)
695#define SCL_STATE_ALL (SCL_STATE | SCL_L2ARC | SCL_ZIO)
696
a08ee875
LG		 697/* Historical pool statistics */
698typedef struct spa_stats_history {
699 kmutex_t lock;
700 uint64_t count;
701 uint64_t size;
702 kstat_t *kstat;
703 void *private;
704 list_t list;
705} spa_stats_history_t;
706
707typedef struct spa_stats {
708 spa_stats_history_t read_history;
709 spa_stats_history_t txg_history;
710 spa_stats_history_t tx_assign_histogram;
711 spa_stats_history_t io_history;
712} spa_stats_t;
713
714typedef enum txg_state {
715 TXG_STATE_BIRTH = 0,
716 TXG_STATE_OPEN = 1,
717 TXG_STATE_QUIESCED = 2,
718 TXG_STATE_WAIT_FOR_SYNC = 3,
719 TXG_STATE_SYNCED = 4,
720 TXG_STATE_COMMITTED = 5,
721} txg_state_t;
722
723extern void spa_stats_init(spa_t *spa);
724extern void spa_stats_destroy(spa_t *spa);
ea04106b 725extern void spa_read_history_add(spa_t *spa, const zbookmark_phys_t *zb,
a08ee875
LG		 726 uint32_t aflags);
727extern void spa_txg_history_add(spa_t *spa, uint64_t txg, hrtime_t birth_time);
728extern int spa_txg_history_set(spa_t *spa, uint64_t txg,
729 txg_state_t completed_state, hrtime_t completed_time);
730extern int spa_txg_history_set_io(spa_t *spa, uint64_t txg, uint64_t nread,
ea04106b 731 uint64_t nwritten, uint64_t reads, uint64_t writes, uint64_t ndirty);
a08ee875
LG		 732extern void spa_tx_assign_add_nsecs(spa_t *spa, uint64_t nsecs);
733
b128c09f
BB		 734/* Pool configuration locks */
735extern int spa_config_tryenter(spa_t *spa, int locks, void *tag, krw_t rw);
736extern void spa_config_enter(spa_t *spa, int locks, void *tag, krw_t rw);
737extern void spa_config_exit(spa_t *spa, int locks, void *tag);
738extern int spa_config_held(spa_t *spa, int locks, krw_t rw);
34dc7c2f
BB		 739
740/* Pool vdev add/remove lock */
741extern uint64_t spa_vdev_enter(spa_t *spa);
428870ff
BB		 742extern uint64_t spa_vdev_config_enter(spa_t *spa);
743extern void spa_vdev_config_exit(spa_t *spa, vdev_t *vd, uint64_t txg,
744 int error, char *tag);
34dc7c2f
BB		 745extern int spa_vdev_exit(spa_t *spa, vdev_t *vd, uint64_t txg, int error);
746
b128c09f 747/* Pool vdev state change lock */
428870ff 748extern void spa_vdev_state_enter(spa_t *spa, int oplock);
b128c09f
BB		 749extern int spa_vdev_state_exit(spa_t *spa, vdev_t *vd, int error);
750
428870ff
BB		 751/* Log state */
752typedef enum spa_log_state {
753 SPA_LOG_UNKNOWN = 0, /* unknown log state */
754 SPA_LOG_MISSING, /* missing log(s) */
755 SPA_LOG_CLEAR, /* clear the log(s) */
756 SPA_LOG_GOOD, /* log(s) are good */
757} spa_log_state_t;
758
759extern spa_log_state_t spa_get_log_state(spa_t *spa);
760extern void spa_set_log_state(spa_t *spa, spa_log_state_t state);
761extern int spa_offline_log(spa_t *spa);
762
763/* Log claim callback */
764extern void spa_claim_notify(zio_t *zio);
c06d4368 765extern void spa_deadman(void *);
428870ff 766
34dc7c2f 767/* Accessor functions */
b128c09f 768extern boolean_t spa_shutting_down(spa_t *spa);
34dc7c2f 769extern struct dsl_pool *spa_get_dsl(spa_t *spa);
9ae529ec 770extern boolean_t spa_is_initializing(spa_t *spa);
34dc7c2f
BB		 771extern blkptr_t *spa_get_rootblkptr(spa_t *spa);
772extern void spa_set_rootblkptr(spa_t *spa, const blkptr_t *bp);
773extern void spa_altroot(spa_t *, char *, size_t);
774extern int spa_sync_pass(spa_t *spa);
775extern char *spa_name(spa_t *spa);
776extern uint64_t spa_guid(spa_t *spa);
3541dc6d 777extern uint64_t spa_load_guid(spa_t *spa);
34dc7c2f
BB		 778extern uint64_t spa_last_synced_txg(spa_t *spa);
779extern uint64_t spa_first_txg(spa_t *spa);
428870ff 780extern uint64_t spa_syncing_txg(spa_t *spa);
34dc7c2f 781extern uint64_t spa_version(spa_t *spa);
b128c09f 782extern pool_state_t spa_state(spa_t *spa);
428870ff 783extern spa_load_state_t spa_load_state(spa_t *spa);
34dc7c2f 784extern uint64_t spa_freeze_txg(spa_t *spa);
34dc7c2f 785extern uint64_t spa_get_asize(spa_t *spa, uint64_t lsize);
428870ff
BB		 786extern uint64_t spa_get_dspace(spa_t *spa);
787extern void spa_update_dspace(spa_t *spa);
34dc7c2f 788extern uint64_t spa_version(spa_t *spa);
428870ff
BB		 789extern boolean_t spa_deflate(spa_t *spa);
790extern metaslab_class_t *spa_normal_class(spa_t *spa);
791extern metaslab_class_t *spa_log_class(spa_t *spa);
34dc7c2f 792extern int spa_max_replication(spa_t *spa);
428870ff 793extern int spa_prev_software_version(spa_t *spa);
34dc7c2f
BB		 794extern int spa_busy(void);
795extern uint8_t spa_get_failmode(spa_t *spa);
b128c09f 796extern boolean_t spa_suspended(spa_t *spa);
428870ff
BB		 797extern uint64_t spa_bootfs(spa_t *spa);
798extern uint64_t spa_delegation(spa_t *spa);
799extern objset_t *spa_meta_objset(spa_t *spa);
c06d4368 800extern uint64_t spa_deadman_synctime(spa_t *spa);
34dc7c2f
BB		 801
802/* Miscellaneous support routines */
ea04106b
AX		 803extern void spa_activate_mos_feature(spa_t *spa, const char *feature,
804 dmu_tx_t *tx);
9ae529ec 805extern void spa_deactivate_mos_feature(spa_t *spa, const char *feature);
34dc7c2f 806extern int spa_rename(const char *oldname, const char *newname);
572e2857 807extern spa_t *spa_by_guid(uint64_t pool_guid, uint64_t device_guid);
34dc7c2f
BB		 808extern boolean_t spa_guid_exists(uint64_t pool_guid, uint64_t device_guid);
809extern char *spa_strdup(const char *);
810extern void spa_strfree(char *);
811extern uint64_t spa_get_random(uint64_t range);
428870ff 812extern uint64_t spa_generate_guid(spa_t *spa);
ea04106b 813extern void snprintf_blkptr(char *buf, size_t buflen, const blkptr_t *bp);
34dc7c2f 814extern void spa_freeze(spa_t *spa);
3541dc6d 815extern int spa_change_guid(spa_t *spa);
34dc7c2f
BB		 816extern void spa_upgrade(spa_t *spa, uint64_t version);
817extern void spa_evict_all(void);
b128c09f
BB		 818extern vdev_t *spa_lookup_by_guid(spa_t *spa, uint64_t guid,
819 boolean_t l2cache);
34dc7c2f 820extern boolean_t spa_has_spare(spa_t *, uint64_t guid);
428870ff
BB		 821extern uint64_t dva_get_dsize_sync(spa_t *spa, const dva_t *dva);
822extern uint64_t bp_get_dsize_sync(spa_t *spa, const blkptr_t *bp);
823extern uint64_t bp_get_dsize(spa_t *spa, const blkptr_t *bp);
34dc7c2f 824extern boolean_t spa_has_slogs(spa_t *spa);
b128c09f 825extern boolean_t spa_is_root(spa_t *spa);
fb5f0bc8 826extern boolean_t spa_writeable(spa_t *spa);
ea04106b 827extern boolean_t spa_has_pending_synctask(spa_t *spa);
428870ff 828
fb5f0bc8 829extern int spa_mode(spa_t *spa);
428870ff 830extern uint64_t strtonum(const char *str, char **nptr);
34dc7c2f 831
34dc7c2f
BB		 832extern char *spa_his_ievent_table[];
833
834extern void spa_history_create_obj(spa_t *spa, dmu_tx_t *tx);
835extern int spa_history_get(spa_t *spa, uint64_t *offset, uint64_t *len_read,
836 char *his_buf);
a08ee875
LG		 837extern int spa_history_log(spa_t *spa, const char *his_buf);
838extern int spa_history_log_nvl(spa_t *spa, nvlist_t *nvl);
839extern void spa_history_log_version(spa_t *spa, const char *operation);
840extern void spa_history_log_internal(spa_t *spa, const char *operation,
841 dmu_tx_t *tx, const char *fmt, ...);
842extern void spa_history_log_internal_ds(struct dsl_dataset *ds, const char *op,
843 dmu_tx_t *tx, const char *fmt, ...);
844extern void spa_history_log_internal_dd(dsl_dir_t *dd, const char *operation,
845 dmu_tx_t *tx, const char *fmt, ...);
34dc7c2f
BB		 846
847/* error handling */
ea04106b 848struct zbookmark_phys;
428870ff 849extern void spa_log_error(spa_t *spa, zio_t *zio);
34dc7c2f 850extern void zfs_ereport_post(const char *class, spa_t *spa, vdev_t *vd,
428870ff 851 zio_t *zio, uint64_t stateoroffset, uint64_t length);
34dc7c2f 852extern void zfs_post_remove(spa_t *spa, vdev_t *vd);
428870ff 853extern void zfs_post_state_change(spa_t *spa, vdev_t *vd);
34dc7c2f
BB		 854extern void zfs_post_autoreplace(spa_t *spa, vdev_t *vd);
855extern uint64_t spa_get_errlog_size(spa_t *spa);
856extern int spa_get_errlog(spa_t *spa, void *uaddr, size_t *count);
857extern void spa_errlog_rotate(spa_t *spa);
858extern void spa_errlog_drain(spa_t *spa);
859extern void spa_errlog_sync(spa_t *spa, uint64_t txg);
860extern void spa_get_errlists(spa_t *spa, avl_tree_t *last, avl_tree_t *scrub);
861
862/* vdev cache */
863extern void vdev_cache_stat_init(void);
864extern void vdev_cache_stat_fini(void);
865
866/* Initialization and termination */
867extern void spa_init(int flags);
868extern void spa_fini(void);
0bc8fd78 869extern void spa_boot_init(void);
34dc7c2f
BB		 870
871/* properties */
872extern int spa_prop_set(spa_t *spa, nvlist_t *nvp);
873extern int spa_prop_get(spa_t *spa, nvlist_t **nvp);
874extern void spa_prop_clear_bootfs(spa_t *spa, uint64_t obj, dmu_tx_t *tx);
d164b209 875extern void spa_configfile_set(spa_t *, nvlist_t *, boolean_t);
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BB		 876
877/* asynchronous event notification */
878extern void spa_event_notify(spa_t *spa, vdev_t *vdev, const char *name);
879
880#ifdef ZFS_DEBUG
ea04106b
AX		 881#define dprintf_bp(bp, fmt, ...) do { \
882 if (zfs_flags & ZFS_DEBUG_DPRINTF) { \
883 char *__blkbuf = kmem_alloc(BP_SPRINTF_LEN, KM_SLEEP); \
884 snprintf_blkptr(__blkbuf, BP_SPRINTF_LEN, (bp)); \
885 dprintf(fmt " %s\n", __VA_ARGS__, __blkbuf); \
886 kmem_free(__blkbuf, BP_SPRINTF_LEN); \
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BB		 887 } \
888_NOTE(CONSTCOND) } while (0)
889#else
890#define dprintf_bp(bp, fmt, ...)
891#endif
892
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GW		 893extern boolean_t spa_debug_enabled(spa_t *spa);
894#define spa_dbgmsg(spa, ...) \
895{ \
896 if (spa_debug_enabled(spa)) \
897 zfs_dbgmsg(__VA_ARGS__); \
898}
899
fb5f0bc8 900extern int spa_mode_global; /* mode, e.g. FREAD | FWRITE */
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BB		 901
902#ifdef __cplusplus
903}
904#endif
905
906#endif /* _SYS_SPA_H */
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