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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. |
5dbd68a3 | 23 | * Copyright (c) 2011, 2014 by Delphix. All rights reserved. |
3541dc6d | 24 | * Copyright 2011 Nexenta Systems, Inc. All rights reserved. |
0c66c32d | 25 | * Copyright (c) 2014 Spectra Logic Corporation, All rights reserved. |
3c67d83a | 26 | * Copyright 2013 Saso Kiselkov. All rights reserved. |
12fa0466 DE |
27 | * Copyright (c) 2014 Integros [integros.com] |
28 | * Copyright 2017 Joyent, Inc. | |
0ea05c64 | 29 | * Copyright (c) 2017 Datto Inc. |
34dc7c2f BB |
30 | */ |
31 | ||
32 | #ifndef _SYS_SPA_H | |
33 | #define _SYS_SPA_H | |
34 | ||
34dc7c2f BB |
35 | #include <sys/avl.h> |
36 | #include <sys/zfs_context.h> | |
efcd79a8 | 37 | #include <sys/kstat.h> |
34dc7c2f BB |
38 | #include <sys/nvpair.h> |
39 | #include <sys/sysmacros.h> | |
40 | #include <sys/types.h> | |
41 | #include <sys/fs/zfs.h> | |
1eeb4562 | 42 | #include <sys/spa_checksum.h> |
c4434877 | 43 | #include <sys/dmu.h> |
34dc7c2f BB |
44 | |
45 | #ifdef __cplusplus | |
46 | extern "C" { | |
47 | #endif | |
48 | ||
49 | /* | |
50 | * Forward references that lots of things need. | |
51 | */ | |
52 | typedef struct spa spa_t; | |
53 | typedef struct vdev vdev_t; | |
54 | typedef struct metaslab metaslab_t; | |
428870ff BB |
55 | typedef struct metaslab_group metaslab_group_t; |
56 | typedef struct metaslab_class metaslab_class_t; | |
57 | typedef struct zio zio_t; | |
34dc7c2f | 58 | typedef struct zilog zilog_t; |
34dc7c2f | 59 | typedef struct spa_aux_vdev spa_aux_vdev_t; |
428870ff BB |
60 | typedef struct ddt ddt_t; |
61 | typedef struct ddt_entry ddt_entry_t; | |
5dbd68a3 | 62 | typedef struct zbookmark_phys zbookmark_phys_t; |
1421c891 | 63 | |
34dc7c2f | 64 | struct dsl_pool; |
6f1ffb06 | 65 | struct dsl_dataset; |
b5256303 | 66 | struct dsl_crypto_params; |
34dc7c2f BB |
67 | |
68 | /* | |
69 | * General-purpose 32-bit and 64-bit bitfield encodings. | |
70 | */ | |
71 | #define BF32_DECODE(x, low, len) P2PHASE((x) >> (low), 1U << (len)) | |
72 | #define BF64_DECODE(x, low, len) P2PHASE((x) >> (low), 1ULL << (len)) | |
73 | #define BF32_ENCODE(x, low, len) (P2PHASE((x), 1U << (len)) << (low)) | |
74 | #define BF64_ENCODE(x, low, len) (P2PHASE((x), 1ULL << (len)) << (low)) | |
75 | ||
76 | #define BF32_GET(x, low, len) BF32_DECODE(x, low, len) | |
77 | #define BF64_GET(x, low, len) BF64_DECODE(x, low, len) | |
78 | ||
b0bc7a84 MG |
79 | #define BF32_SET(x, low, len, val) do { \ |
80 | ASSERT3U(val, <, 1U << (len)); \ | |
81 | ASSERT3U(low + len, <=, 32); \ | |
82 | (x) ^= BF32_ENCODE((x >> low) ^ (val), low, len); \ | |
83 | _NOTE(CONSTCOND) } while (0) | |
84 | ||
85 | #define BF64_SET(x, low, len, val) do { \ | |
86 | ASSERT3U(val, <, 1ULL << (len)); \ | |
87 | ASSERT3U(low + len, <=, 64); \ | |
88 | ((x) ^= BF64_ENCODE((x >> low) ^ (val), low, len)); \ | |
89 | _NOTE(CONSTCOND) } while (0) | |
34dc7c2f BB |
90 | |
91 | #define BF32_GET_SB(x, low, len, shift, bias) \ | |
92 | ((BF32_GET(x, low, len) + (bias)) << (shift)) | |
93 | #define BF64_GET_SB(x, low, len, shift, bias) \ | |
94 | ((BF64_GET(x, low, len) + (bias)) << (shift)) | |
95 | ||
b0bc7a84 MG |
96 | #define BF32_SET_SB(x, low, len, shift, bias, val) do { \ |
97 | ASSERT(IS_P2ALIGNED(val, 1U << shift)); \ | |
98 | ASSERT3S((val) >> (shift), >=, bias); \ | |
99 | BF32_SET(x, low, len, ((val) >> (shift)) - (bias)); \ | |
100 | _NOTE(CONSTCOND) } while (0) | |
101 | #define BF64_SET_SB(x, low, len, shift, bias, val) do { \ | |
102 | ASSERT(IS_P2ALIGNED(val, 1ULL << shift)); \ | |
103 | ASSERT3S((val) >> (shift), >=, bias); \ | |
104 | BF64_SET(x, low, len, ((val) >> (shift)) - (bias)); \ | |
105 | _NOTE(CONSTCOND) } while (0) | |
34dc7c2f BB |
106 | |
107 | /* | |
f1512ee6 MA |
108 | * We currently support block sizes from 512 bytes to 16MB. |
109 | * The benefits of larger blocks, and thus larger IO, need to be weighed | |
110 | * against the cost of COWing a giant block to modify one byte, and the | |
111 | * large latency of reading or writing a large block. | |
112 | * | |
113 | * Note that although blocks up to 16MB are supported, the recordsize | |
114 | * property can not be set larger than zfs_max_recordsize (default 1MB). | |
115 | * See the comment near zfs_max_recordsize in dsl_dataset.c for details. | |
116 | * | |
117 | * Note that although the LSIZE field of the blkptr_t can store sizes up | |
118 | * to 32MB, the dnode's dn_datablkszsec can only store sizes up to | |
119 | * 32MB - 512 bytes. Therefore, we limit SPA_MAXBLOCKSIZE to 16MB. | |
34dc7c2f BB |
120 | */ |
121 | #define SPA_MINBLOCKSHIFT 9 | |
f1512ee6 MA |
122 | #define SPA_OLD_MAXBLOCKSHIFT 17 |
123 | #define SPA_MAXBLOCKSHIFT 24 | |
34dc7c2f | 124 | #define SPA_MINBLOCKSIZE (1ULL << SPA_MINBLOCKSHIFT) |
f1512ee6 | 125 | #define SPA_OLD_MAXBLOCKSIZE (1ULL << SPA_OLD_MAXBLOCKSHIFT) |
34dc7c2f BB |
126 | #define SPA_MAXBLOCKSIZE (1ULL << SPA_MAXBLOCKSHIFT) |
127 | ||
ff61d1a4 | 128 | /* |
129 | * Alignment Shift (ashift) is an immutable, internal top-level vdev property | |
130 | * which can only be set at vdev creation time. Physical writes are always done | |
131 | * according to it, which makes 2^ashift the smallest possible IO on a vdev. | |
132 | * | |
dddef7d6 | 133 | * We currently allow values ranging from 512 bytes (2^9 = 512) to 64 KiB |
134 | * (2^16 = 65,536). | |
ff61d1a4 | 135 | */ |
136 | #define ASHIFT_MIN 9 | |
dddef7d6 | 137 | #define ASHIFT_MAX 16 |
ff61d1a4 | 138 | |
b128c09f BB |
139 | /* |
140 | * Size of block to hold the configuration data (a packed nvlist) | |
141 | */ | |
9ae529ec | 142 | #define SPA_CONFIG_BLOCKSIZE (1ULL << 14) |
b128c09f | 143 | |
34dc7c2f BB |
144 | /* |
145 | * The DVA size encodings for LSIZE and PSIZE support blocks up to 32MB. | |
146 | * The ASIZE encoding should be at least 64 times larger (6 more bits) | |
147 | * to support up to 4-way RAID-Z mirror mode with worst-case gang block | |
148 | * overhead, three DVAs per bp, plus one more bit in case we do anything | |
149 | * else that expands the ASIZE. | |
150 | */ | |
151 | #define SPA_LSIZEBITS 16 /* LSIZE up to 32M (2^16 * 512) */ | |
152 | #define SPA_PSIZEBITS 16 /* PSIZE up to 32M (2^16 * 512) */ | |
153 | #define SPA_ASIZEBITS 24 /* ASIZE up to 64 times larger */ | |
154 | ||
d3c2ae1c GW |
155 | #define SPA_COMPRESSBITS 7 |
156 | ||
34dc7c2f BB |
157 | /* |
158 | * All SPA data is represented by 128-bit data virtual addresses (DVAs). | |
159 | * The members of the dva_t should be considered opaque outside the SPA. | |
160 | */ | |
161 | typedef struct dva { | |
162 | uint64_t dva_word[2]; | |
163 | } dva_t; | |
164 | ||
34dc7c2f | 165 | |
3c67d83a TH |
166 | /* |
167 | * Some checksums/hashes need a 256-bit initialization salt. This salt is kept | |
168 | * secret and is suitable for use in MAC algorithms as the key. | |
169 | */ | |
170 | typedef struct zio_cksum_salt { | |
171 | uint8_t zcs_bytes[32]; | |
172 | } zio_cksum_salt_t; | |
173 | ||
34dc7c2f BB |
174 | /* |
175 | * Each block is described by its DVAs, time of birth, checksum, etc. | |
176 | * The word-by-word, bit-by-bit layout of the blkptr is as follows: | |
177 | * | |
178 | * 64 56 48 40 32 24 16 8 0 | |
179 | * +-------+-------+-------+-------+-------+-------+-------+-------+ | |
180 | * 0 | vdev1 | GRID | ASIZE | | |
181 | * +-------+-------+-------+-------+-------+-------+-------+-------+ | |
182 | * 1 |G| offset1 | | |
183 | * +-------+-------+-------+-------+-------+-------+-------+-------+ | |
184 | * 2 | vdev2 | GRID | ASIZE | | |
185 | * +-------+-------+-------+-------+-------+-------+-------+-------+ | |
186 | * 3 |G| offset2 | | |
187 | * +-------+-------+-------+-------+-------+-------+-------+-------+ | |
188 | * 4 | vdev3 | GRID | ASIZE | | |
189 | * +-------+-------+-------+-------+-------+-------+-------+-------+ | |
190 | * 5 |G| offset3 | | |
191 | * +-------+-------+-------+-------+-------+-------+-------+-------+ | |
9b67f605 | 192 | * 6 |BDX|lvl| type | cksum |E| comp| PSIZE | LSIZE | |
34dc7c2f BB |
193 | * +-------+-------+-------+-------+-------+-------+-------+-------+ |
194 | * 7 | padding | | |
195 | * +-------+-------+-------+-------+-------+-------+-------+-------+ | |
196 | * 8 | padding | | |
197 | * +-------+-------+-------+-------+-------+-------+-------+-------+ | |
428870ff | 198 | * 9 | physical birth txg | |
34dc7c2f | 199 | * +-------+-------+-------+-------+-------+-------+-------+-------+ |
428870ff | 200 | * a | logical birth txg | |
34dc7c2f BB |
201 | * +-------+-------+-------+-------+-------+-------+-------+-------+ |
202 | * b | fill count | | |
203 | * +-------+-------+-------+-------+-------+-------+-------+-------+ | |
204 | * c | checksum[0] | | |
205 | * +-------+-------+-------+-------+-------+-------+-------+-------+ | |
206 | * d | checksum[1] | | |
207 | * +-------+-------+-------+-------+-------+-------+-------+-------+ | |
208 | * e | checksum[2] | | |
209 | * +-------+-------+-------+-------+-------+-------+-------+-------+ | |
210 | * f | checksum[3] | | |
211 | * +-------+-------+-------+-------+-------+-------+-------+-------+ | |
212 | * | |
213 | * Legend: | |
214 | * | |
215 | * vdev virtual device ID | |
216 | * offset offset into virtual device | |
217 | * LSIZE logical size | |
218 | * PSIZE physical size (after compression) | |
219 | * ASIZE allocated size (including RAID-Z parity and gang block headers) | |
220 | * GRID RAID-Z layout information (reserved for future use) | |
221 | * cksum checksum function | |
222 | * comp compression function | |
223 | * G gang block indicator | |
428870ff BB |
224 | * B byteorder (endianness) |
225 | * D dedup | |
b5256303 | 226 | * X encryption |
9b67f605 | 227 | * E blkptr_t contains embedded data (see below) |
34dc7c2f | 228 | * lvl level of indirection |
428870ff | 229 | * type DMU object type |
a1d477c2 MA |
230 | * phys birth txg when dva[0] was written; zero if same as logical birth txg |
231 | * note that typically all the dva's would be written in this | |
232 | * txg, but they could be different if they were moved by | |
233 | * device removal. | |
428870ff | 234 | * log. birth transaction group in which the block was logically born |
34dc7c2f BB |
235 | * fill count number of non-zero blocks under this bp |
236 | * checksum[4] 256-bit checksum of the data this bp describes | |
237 | */ | |
9b67f605 | 238 | |
b5256303 TC |
239 | /* |
240 | * The blkptr_t's of encrypted blocks also need to store the encryption | |
241 | * parameters so that the block can be decrypted. This layout is as follows: | |
242 | * | |
243 | * 64 56 48 40 32 24 16 8 0 | |
244 | * +-------+-------+-------+-------+-------+-------+-------+-------+ | |
245 | * 0 | vdev1 | GRID | ASIZE | | |
246 | * +-------+-------+-------+-------+-------+-------+-------+-------+ | |
247 | * 1 |G| offset1 | | |
248 | * +-------+-------+-------+-------+-------+-------+-------+-------+ | |
249 | * 2 | vdev2 | GRID | ASIZE | | |
250 | * +-------+-------+-------+-------+-------+-------+-------+-------+ | |
251 | * 3 |G| offset2 | | |
252 | * +-------+-------+-------+-------+-------+-------+-------+-------+ | |
253 | * 4 | salt | | |
254 | * +-------+-------+-------+-------+-------+-------+-------+-------+ | |
255 | * 5 | IV1 | | |
256 | * +-------+-------+-------+-------+-------+-------+-------+-------+ | |
257 | * 6 |BDX|lvl| type | cksum |E| comp| PSIZE | LSIZE | | |
258 | * +-------+-------+-------+-------+-------+-------+-------+-------+ | |
259 | * 7 | padding | | |
260 | * +-------+-------+-------+-------+-------+-------+-------+-------+ | |
261 | * 8 | padding | | |
262 | * +-------+-------+-------+-------+-------+-------+-------+-------+ | |
263 | * 9 | physical birth txg | | |
264 | * +-------+-------+-------+-------+-------+-------+-------+-------+ | |
265 | * a | logical birth txg | | |
266 | * +-------+-------+-------+-------+-------+-------+-------+-------+ | |
267 | * b | IV2 | fill count | | |
268 | * +-------+-------+-------+-------+-------+-------+-------+-------+ | |
269 | * c | checksum[0] | | |
270 | * +-------+-------+-------+-------+-------+-------+-------+-------+ | |
271 | * d | checksum[1] | | |
272 | * +-------+-------+-------+-------+-------+-------+-------+-------+ | |
273 | * e | MAC[0] | | |
274 | * +-------+-------+-------+-------+-------+-------+-------+-------+ | |
275 | * f | MAC[1] | | |
276 | * +-------+-------+-------+-------+-------+-------+-------+-------+ | |
277 | * | |
278 | * Legend: | |
279 | * | |
280 | * salt Salt for generating encryption keys | |
281 | * IV1 First 64 bits of encryption IV | |
282 | * X Block requires encryption handling (set to 1) | |
283 | * E blkptr_t contains embedded data (set to 0, see below) | |
284 | * fill count number of non-zero blocks under this bp (truncated to 32 bits) | |
285 | * IV2 Last 32 bits of encryption IV | |
286 | * checksum[2] 128-bit checksum of the data this bp describes | |
287 | * MAC[2] 128-bit message authentication code for this data | |
288 | * | |
289 | * The X bit being set indicates that this block is one of 3 types. If this is | |
290 | * a level 0 block with an encrypted object type, the block is encrypted | |
291 | * (see BP_IS_ENCRYPTED()). If this is a level 0 block with an unencrypted | |
292 | * object type, this block is authenticated with an HMAC (see | |
293 | * BP_IS_AUTHENTICATED()). Otherwise (if level > 0), this bp will use the MAC | |
294 | * words to store a checksum-of-MACs from the level below (see | |
295 | * BP_HAS_INDIRECT_MAC_CKSUM()). For convenience in the code, BP_IS_PROTECTED() | |
296 | * refers to both encrypted and authenticated blocks and BP_USES_CRYPT() | |
297 | * refers to any of these 3 kinds of blocks. | |
298 | * | |
299 | * The additional encryption parameters are the salt, IV, and MAC which are | |
300 | * explained in greater detail in the block comment at the top of zio_crypt.c. | |
301 | * The MAC occupies half of the checksum space since it serves a very similar | |
302 | * purpose: to prevent data corruption on disk. The only functional difference | |
303 | * is that the checksum is used to detect on-disk corruption whether or not the | |
304 | * encryption key is loaded and the MAC provides additional protection against | |
305 | * malicious disk tampering. We use the 3rd DVA to store the salt and first | |
306 | * 64 bits of the IV. As a result encrypted blocks can only have 2 copies | |
307 | * maximum instead of the normal 3. The last 32 bits of the IV are stored in | |
308 | * the upper bits of what is usually the fill count. Note that only blocks at | |
309 | * level 0 or -2 are ever encrypted, which allows us to guarantee that these | |
310 | * 32 bits are not trampled over by other code (see zio_crypt.c for details). | |
311 | * The salt and IV are not used for authenticated bps or bps with an indirect | |
312 | * MAC checksum, so these blocks can utilize all 3 DVAs and the full 64 bits | |
313 | * for the fill count. | |
314 | */ | |
315 | ||
9b67f605 MA |
316 | /* |
317 | * "Embedded" blkptr_t's don't actually point to a block, instead they | |
318 | * have a data payload embedded in the blkptr_t itself. See the comment | |
319 | * in blkptr.c for more details. | |
320 | * | |
321 | * The blkptr_t is laid out as follows: | |
322 | * | |
323 | * 64 56 48 40 32 24 16 8 0 | |
324 | * +-------+-------+-------+-------+-------+-------+-------+-------+ | |
325 | * 0 | payload | | |
326 | * 1 | payload | | |
327 | * 2 | payload | | |
328 | * 3 | payload | | |
329 | * 4 | payload | | |
330 | * 5 | payload | | |
331 | * +-------+-------+-------+-------+-------+-------+-------+-------+ | |
332 | * 6 |BDX|lvl| type | etype |E| comp| PSIZE| LSIZE | | |
333 | * +-------+-------+-------+-------+-------+-------+-------+-------+ | |
334 | * 7 | payload | | |
335 | * 8 | payload | | |
336 | * 9 | payload | | |
337 | * +-------+-------+-------+-------+-------+-------+-------+-------+ | |
338 | * a | logical birth txg | | |
339 | * +-------+-------+-------+-------+-------+-------+-------+-------+ | |
340 | * b | payload | | |
341 | * c | payload | | |
342 | * d | payload | | |
343 | * e | payload | | |
344 | * f | payload | | |
345 | * +-------+-------+-------+-------+-------+-------+-------+-------+ | |
346 | * | |
347 | * Legend: | |
348 | * | |
349 | * payload contains the embedded data | |
350 | * B (byteorder) byteorder (endianness) | |
351 | * D (dedup) padding (set to zero) | |
b5256303 | 352 | * X encryption (set to zero) |
9b67f605 MA |
353 | * E (embedded) set to one |
354 | * lvl indirection level | |
355 | * type DMU object type | |
356 | * etype how to interpret embedded data (BP_EMBEDDED_TYPE_*) | |
357 | * comp compression function of payload | |
358 | * PSIZE size of payload after compression, in bytes | |
359 | * LSIZE logical size of payload, in bytes | |
360 | * note that 25 bits is enough to store the largest | |
361 | * "normal" BP's LSIZE (2^16 * 2^9) in bytes | |
362 | * log. birth transaction group in which the block was logically born | |
363 | * | |
364 | * Note that LSIZE and PSIZE are stored in bytes, whereas for non-embedded | |
365 | * bp's they are stored in units of SPA_MINBLOCKSHIFT. | |
366 | * Generally, the generic BP_GET_*() macros can be used on embedded BP's. | |
367 | * The B, D, X, lvl, type, and comp fields are stored the same as with normal | |
368 | * BP's so the BP_SET_* macros can be used with them. etype, PSIZE, LSIZE must | |
369 | * be set with the BPE_SET_* macros. BP_SET_EMBEDDED() should be called before | |
370 | * other macros, as they assert that they are only used on BP's of the correct | |
b5256303 TC |
371 | * "embedded-ness". Encrypted blkptr_t's cannot be embedded because they use |
372 | * the payload space for encryption parameters (see the comment above on | |
373 | * how encryption parameters are stored). | |
9b67f605 MA |
374 | */ |
375 | ||
376 | #define BPE_GET_ETYPE(bp) \ | |
377 | (ASSERT(BP_IS_EMBEDDED(bp)), \ | |
378 | BF64_GET((bp)->blk_prop, 40, 8)) | |
379 | #define BPE_SET_ETYPE(bp, t) do { \ | |
380 | ASSERT(BP_IS_EMBEDDED(bp)); \ | |
381 | BF64_SET((bp)->blk_prop, 40, 8, t); \ | |
382 | _NOTE(CONSTCOND) } while (0) | |
383 | ||
384 | #define BPE_GET_LSIZE(bp) \ | |
385 | (ASSERT(BP_IS_EMBEDDED(bp)), \ | |
386 | BF64_GET_SB((bp)->blk_prop, 0, 25, 0, 1)) | |
387 | #define BPE_SET_LSIZE(bp, x) do { \ | |
388 | ASSERT(BP_IS_EMBEDDED(bp)); \ | |
389 | BF64_SET_SB((bp)->blk_prop, 0, 25, 0, 1, x); \ | |
390 | _NOTE(CONSTCOND) } while (0) | |
391 | ||
392 | #define BPE_GET_PSIZE(bp) \ | |
393 | (ASSERT(BP_IS_EMBEDDED(bp)), \ | |
394 | BF64_GET_SB((bp)->blk_prop, 25, 7, 0, 1)) | |
395 | #define BPE_SET_PSIZE(bp, x) do { \ | |
396 | ASSERT(BP_IS_EMBEDDED(bp)); \ | |
397 | BF64_SET_SB((bp)->blk_prop, 25, 7, 0, 1, x); \ | |
398 | _NOTE(CONSTCOND) } while (0) | |
399 | ||
400 | typedef enum bp_embedded_type { | |
401 | BP_EMBEDDED_TYPE_DATA, | |
402 | BP_EMBEDDED_TYPE_RESERVED, /* Reserved for an unintegrated feature. */ | |
403 | NUM_BP_EMBEDDED_TYPES = BP_EMBEDDED_TYPE_RESERVED | |
404 | } bp_embedded_type_t; | |
405 | ||
406 | #define BPE_NUM_WORDS 14 | |
407 | #define BPE_PAYLOAD_SIZE (BPE_NUM_WORDS * sizeof (uint64_t)) | |
408 | #define BPE_IS_PAYLOADWORD(bp, wp) \ | |
409 | ((wp) != &(bp)->blk_prop && (wp) != &(bp)->blk_birth) | |
410 | ||
34dc7c2f BB |
411 | #define SPA_BLKPTRSHIFT 7 /* blkptr_t is 128 bytes */ |
412 | #define SPA_DVAS_PER_BP 3 /* Number of DVAs in a bp */ | |
6cb8e530 | 413 | #define SPA_SYNC_MIN_VDEVS 3 /* min vdevs to update during sync */ |
34dc7c2f | 414 | |
b0bc7a84 MG |
415 | /* |
416 | * A block is a hole when it has either 1) never been written to, or | |
417 | * 2) is zero-filled. In both cases, ZFS can return all zeroes for all reads | |
418 | * without physically allocating disk space. Holes are represented in the | |
419 | * blkptr_t structure by zeroed blk_dva. Correct checking for holes is | |
420 | * done through the BP_IS_HOLE macro. For holes, the logical size, level, | |
421 | * DMU object type, and birth times are all also stored for holes that | |
422 | * were written to at some point (i.e. were punched after having been filled). | |
423 | */ | |
428870ff BB |
424 | typedef struct blkptr { |
425 | dva_t blk_dva[SPA_DVAS_PER_BP]; /* Data Virtual Addresses */ | |
426 | uint64_t blk_prop; /* size, compression, type, etc */ | |
427 | uint64_t blk_pad[2]; /* Extra space for the future */ | |
428 | uint64_t blk_phys_birth; /* txg when block was allocated */ | |
429 | uint64_t blk_birth; /* transaction group at birth */ | |
430 | uint64_t blk_fill; /* fill count */ | |
431 | zio_cksum_t blk_cksum; /* 256-bit checksum */ | |
432 | } blkptr_t; | |
433 | ||
34dc7c2f BB |
434 | /* |
435 | * Macros to get and set fields in a bp or DVA. | |
436 | */ | |
437 | #define DVA_GET_ASIZE(dva) \ | |
b0bc7a84 | 438 | BF64_GET_SB((dva)->dva_word[0], 0, SPA_ASIZEBITS, SPA_MINBLOCKSHIFT, 0) |
34dc7c2f | 439 | #define DVA_SET_ASIZE(dva, x) \ |
b0bc7a84 MG |
440 | BF64_SET_SB((dva)->dva_word[0], 0, SPA_ASIZEBITS, \ |
441 | SPA_MINBLOCKSHIFT, 0, x) | |
34dc7c2f BB |
442 | |
443 | #define DVA_GET_GRID(dva) BF64_GET((dva)->dva_word[0], 24, 8) | |
444 | #define DVA_SET_GRID(dva, x) BF64_SET((dva)->dva_word[0], 24, 8, x) | |
445 | ||
446 | #define DVA_GET_VDEV(dva) BF64_GET((dva)->dva_word[0], 32, 32) | |
447 | #define DVA_SET_VDEV(dva, x) BF64_SET((dva)->dva_word[0], 32, 32, x) | |
448 | ||
449 | #define DVA_GET_OFFSET(dva) \ | |
450 | BF64_GET_SB((dva)->dva_word[1], 0, 63, SPA_MINBLOCKSHIFT, 0) | |
451 | #define DVA_SET_OFFSET(dva, x) \ | |
452 | BF64_SET_SB((dva)->dva_word[1], 0, 63, SPA_MINBLOCKSHIFT, 0, x) | |
453 | ||
454 | #define DVA_GET_GANG(dva) BF64_GET((dva)->dva_word[1], 63, 1) | |
455 | #define DVA_SET_GANG(dva, x) BF64_SET((dva)->dva_word[1], 63, 1, x) | |
456 | ||
457 | #define BP_GET_LSIZE(bp) \ | |
9b67f605 MA |
458 | (BP_IS_EMBEDDED(bp) ? \ |
459 | (BPE_GET_ETYPE(bp) == BP_EMBEDDED_TYPE_DATA ? BPE_GET_LSIZE(bp) : 0): \ | |
460 | BF64_GET_SB((bp)->blk_prop, 0, SPA_LSIZEBITS, SPA_MINBLOCKSHIFT, 1)) | |
461 | #define BP_SET_LSIZE(bp, x) do { \ | |
462 | ASSERT(!BP_IS_EMBEDDED(bp)); \ | |
463 | BF64_SET_SB((bp)->blk_prop, \ | |
464 | 0, SPA_LSIZEBITS, SPA_MINBLOCKSHIFT, 1, x); \ | |
465 | _NOTE(CONSTCOND) } while (0) | |
34dc7c2f BB |
466 | |
467 | #define BP_GET_PSIZE(bp) \ | |
9b67f605 MA |
468 | (BP_IS_EMBEDDED(bp) ? 0 : \ |
469 | BF64_GET_SB((bp)->blk_prop, 16, SPA_PSIZEBITS, SPA_MINBLOCKSHIFT, 1)) | |
470 | #define BP_SET_PSIZE(bp, x) do { \ | |
471 | ASSERT(!BP_IS_EMBEDDED(bp)); \ | |
472 | BF64_SET_SB((bp)->blk_prop, \ | |
473 | 16, SPA_PSIZEBITS, SPA_MINBLOCKSHIFT, 1, x); \ | |
474 | _NOTE(CONSTCOND) } while (0) | |
475 | ||
d3c2ae1c GW |
476 | #define BP_GET_COMPRESS(bp) \ |
477 | BF64_GET((bp)->blk_prop, 32, SPA_COMPRESSBITS) | |
478 | #define BP_SET_COMPRESS(bp, x) \ | |
479 | BF64_SET((bp)->blk_prop, 32, SPA_COMPRESSBITS, x) | |
34dc7c2f | 480 | |
9b67f605 MA |
481 | #define BP_IS_EMBEDDED(bp) BF64_GET((bp)->blk_prop, 39, 1) |
482 | #define BP_SET_EMBEDDED(bp, x) BF64_SET((bp)->blk_prop, 39, 1, x) | |
428870ff | 483 | |
9b67f605 MA |
484 | #define BP_GET_CHECKSUM(bp) \ |
485 | (BP_IS_EMBEDDED(bp) ? ZIO_CHECKSUM_OFF : \ | |
486 | BF64_GET((bp)->blk_prop, 40, 8)) | |
487 | #define BP_SET_CHECKSUM(bp, x) do { \ | |
488 | ASSERT(!BP_IS_EMBEDDED(bp)); \ | |
489 | BF64_SET((bp)->blk_prop, 40, 8, x); \ | |
490 | _NOTE(CONSTCOND) } while (0) | |
34dc7c2f | 491 | |
428870ff BB |
492 | #define BP_GET_TYPE(bp) BF64_GET((bp)->blk_prop, 48, 8) |
493 | #define BP_SET_TYPE(bp, x) BF64_SET((bp)->blk_prop, 48, 8, x) | |
34dc7c2f | 494 | |
428870ff BB |
495 | #define BP_GET_LEVEL(bp) BF64_GET((bp)->blk_prop, 56, 5) |
496 | #define BP_SET_LEVEL(bp, x) BF64_SET((bp)->blk_prop, 56, 5, x) | |
34dc7c2f | 497 | |
b5256303 TC |
498 | /* encrypted, authenticated, and MAC cksum bps use the same bit */ |
499 | #define BP_USES_CRYPT(bp) BF64_GET((bp)->blk_prop, 61, 1) | |
500 | #define BP_SET_CRYPT(bp, x) BF64_SET((bp)->blk_prop, 61, 1, x) | |
501 | ||
502 | #define BP_IS_ENCRYPTED(bp) \ | |
503 | (BP_USES_CRYPT(bp) && \ | |
504 | BP_GET_LEVEL(bp) <= 0 && \ | |
505 | DMU_OT_IS_ENCRYPTED(BP_GET_TYPE(bp))) | |
506 | ||
507 | #define BP_IS_AUTHENTICATED(bp) \ | |
508 | (BP_USES_CRYPT(bp) && \ | |
509 | BP_GET_LEVEL(bp) <= 0 && \ | |
510 | !DMU_OT_IS_ENCRYPTED(BP_GET_TYPE(bp))) | |
511 | ||
512 | #define BP_HAS_INDIRECT_MAC_CKSUM(bp) \ | |
513 | (BP_USES_CRYPT(bp) && BP_GET_LEVEL(bp) > 0) | |
514 | ||
515 | #define BP_IS_PROTECTED(bp) \ | |
516 | (BP_IS_ENCRYPTED(bp) || BP_IS_AUTHENTICATED(bp)) | |
517 | ||
428870ff BB |
518 | #define BP_GET_DEDUP(bp) BF64_GET((bp)->blk_prop, 62, 1) |
519 | #define BP_SET_DEDUP(bp, x) BF64_SET((bp)->blk_prop, 62, 1, x) | |
520 | ||
b0bc7a84 | 521 | #define BP_GET_BYTEORDER(bp) BF64_GET((bp)->blk_prop, 63, 1) |
428870ff BB |
522 | #define BP_SET_BYTEORDER(bp, x) BF64_SET((bp)->blk_prop, 63, 1, x) |
523 | ||
524 | #define BP_PHYSICAL_BIRTH(bp) \ | |
9b67f605 MA |
525 | (BP_IS_EMBEDDED(bp) ? 0 : \ |
526 | (bp)->blk_phys_birth ? (bp)->blk_phys_birth : (bp)->blk_birth) | |
428870ff BB |
527 | |
528 | #define BP_SET_BIRTH(bp, logical, physical) \ | |
529 | { \ | |
9b67f605 | 530 | ASSERT(!BP_IS_EMBEDDED(bp)); \ |
428870ff BB |
531 | (bp)->blk_birth = (logical); \ |
532 | (bp)->blk_phys_birth = ((logical) == (physical) ? 0 : (physical)); \ | |
533 | } | |
34dc7c2f | 534 | |
b5256303 TC |
535 | #define BP_GET_FILL(bp) \ |
536 | ((BP_IS_ENCRYPTED(bp)) ? BF64_GET((bp)->blk_fill, 0, 32) : \ | |
537 | ((BP_IS_EMBEDDED(bp)) ? 1 : (bp)->blk_fill)) | |
538 | ||
539 | #define BP_SET_FILL(bp, fill) \ | |
540 | { \ | |
541 | if (BP_IS_ENCRYPTED(bp)) \ | |
542 | BF64_SET((bp)->blk_fill, 0, 32, fill); \ | |
543 | else \ | |
544 | (bp)->blk_fill = fill; \ | |
545 | } | |
546 | ||
547 | #define BP_GET_IV2(bp) \ | |
548 | (ASSERT(BP_IS_ENCRYPTED(bp)), \ | |
549 | BF64_GET((bp)->blk_fill, 32, 32)) | |
550 | #define BP_SET_IV2(bp, iv2) \ | |
551 | { \ | |
552 | ASSERT(BP_IS_ENCRYPTED(bp)); \ | |
553 | BF64_SET((bp)->blk_fill, 32, 32, iv2); \ | |
554 | } | |
9b67f605 | 555 | |
a6255b7f DQ |
556 | #define BP_IS_METADATA(bp) \ |
557 | (BP_GET_LEVEL(bp) > 0 || DMU_OT_IS_METADATA(BP_GET_TYPE(bp))) | |
558 | ||
34dc7c2f | 559 | #define BP_GET_ASIZE(bp) \ |
9b67f605 MA |
560 | (BP_IS_EMBEDDED(bp) ? 0 : \ |
561 | DVA_GET_ASIZE(&(bp)->blk_dva[0]) + \ | |
562 | DVA_GET_ASIZE(&(bp)->blk_dva[1]) + \ | |
b5256303 | 563 | (DVA_GET_ASIZE(&(bp)->blk_dva[2]) * !BP_IS_ENCRYPTED(bp))) |
34dc7c2f | 564 | |
a6255b7f DQ |
565 | #define BP_GET_UCSIZE(bp) \ |
566 | (BP_IS_METADATA(bp) ? BP_GET_PSIZE(bp) : BP_GET_LSIZE(bp)) | |
34dc7c2f BB |
567 | |
568 | #define BP_GET_NDVAS(bp) \ | |
9b67f605 MA |
569 | (BP_IS_EMBEDDED(bp) ? 0 : \ |
570 | !!DVA_GET_ASIZE(&(bp)->blk_dva[0]) + \ | |
34dc7c2f | 571 | !!DVA_GET_ASIZE(&(bp)->blk_dva[1]) + \ |
b5256303 | 572 | (!!DVA_GET_ASIZE(&(bp)->blk_dva[2]) * !BP_IS_ENCRYPTED(bp))) |
34dc7c2f BB |
573 | |
574 | #define BP_COUNT_GANG(bp) \ | |
9b67f605 | 575 | (BP_IS_EMBEDDED(bp) ? 0 : \ |
34dc7c2f BB |
576 | (DVA_GET_GANG(&(bp)->blk_dva[0]) + \ |
577 | DVA_GET_GANG(&(bp)->blk_dva[1]) + \ | |
b5256303 | 578 | (DVA_GET_GANG(&(bp)->blk_dva[2]) * !BP_IS_ENCRYPTED(bp)))) |
34dc7c2f BB |
579 | |
580 | #define DVA_EQUAL(dva1, dva2) \ | |
581 | ((dva1)->dva_word[1] == (dva2)->dva_word[1] && \ | |
582 | (dva1)->dva_word[0] == (dva2)->dva_word[0]) | |
583 | ||
428870ff BB |
584 | #define BP_EQUAL(bp1, bp2) \ |
585 | (BP_PHYSICAL_BIRTH(bp1) == BP_PHYSICAL_BIRTH(bp2) && \ | |
9b67f605 | 586 | (bp1)->blk_birth == (bp2)->blk_birth && \ |
428870ff BB |
587 | DVA_EQUAL(&(bp1)->blk_dva[0], &(bp2)->blk_dva[0]) && \ |
588 | DVA_EQUAL(&(bp1)->blk_dva[1], &(bp2)->blk_dva[1]) && \ | |
589 | DVA_EQUAL(&(bp1)->blk_dva[2], &(bp2)->blk_dva[2])) | |
590 | ||
37f8a883 | 591 | |
34dc7c2f BB |
592 | #define DVA_IS_VALID(dva) (DVA_GET_ASIZE(dva) != 0) |
593 | ||
9b67f605 MA |
594 | #define BP_IDENTITY(bp) (ASSERT(!BP_IS_EMBEDDED(bp)), &(bp)->blk_dva[0]) |
595 | #define BP_IS_GANG(bp) \ | |
596 | (BP_IS_EMBEDDED(bp) ? B_FALSE : DVA_GET_GANG(BP_IDENTITY(bp))) | |
b0bc7a84 MG |
597 | #define DVA_IS_EMPTY(dva) ((dva)->dva_word[0] == 0ULL && \ |
598 | (dva)->dva_word[1] == 0ULL) | |
9b67f605 MA |
599 | #define BP_IS_HOLE(bp) \ |
600 | (!BP_IS_EMBEDDED(bp) && DVA_IS_EMPTY(BP_IDENTITY(bp))) | |
428870ff BB |
601 | |
602 | /* BP_IS_RAIDZ(bp) assumes no block compression */ | |
603 | #define BP_IS_RAIDZ(bp) (DVA_GET_ASIZE(&(bp)->blk_dva[0]) > \ | |
604 | BP_GET_PSIZE(bp)) | |
34dc7c2f | 605 | |
b128c09f | 606 | #define BP_ZERO(bp) \ |
34dc7c2f BB |
607 | { \ |
608 | (bp)->blk_dva[0].dva_word[0] = 0; \ | |
609 | (bp)->blk_dva[0].dva_word[1] = 0; \ | |
610 | (bp)->blk_dva[1].dva_word[0] = 0; \ | |
611 | (bp)->blk_dva[1].dva_word[1] = 0; \ | |
612 | (bp)->blk_dva[2].dva_word[0] = 0; \ | |
613 | (bp)->blk_dva[2].dva_word[1] = 0; \ | |
34dc7c2f BB |
614 | (bp)->blk_prop = 0; \ |
615 | (bp)->blk_pad[0] = 0; \ | |
616 | (bp)->blk_pad[1] = 0; \ | |
428870ff | 617 | (bp)->blk_phys_birth = 0; \ |
b128c09f | 618 | (bp)->blk_birth = 0; \ |
34dc7c2f BB |
619 | (bp)->blk_fill = 0; \ |
620 | ZIO_SET_CHECKSUM(&(bp)->blk_cksum, 0, 0, 0, 0); \ | |
621 | } | |
622 | ||
34dc7c2f BB |
623 | #ifdef _BIG_ENDIAN |
624 | #define ZFS_HOST_BYTEORDER (0ULL) | |
625 | #else | |
b0bc7a84 | 626 | #define ZFS_HOST_BYTEORDER (1ULL) |
34dc7c2f BB |
627 | #endif |
628 | ||
629 | #define BP_SHOULD_BYTESWAP(bp) (BP_GET_BYTEORDER(bp) != ZFS_HOST_BYTEORDER) | |
630 | ||
b5256303 | 631 | #define BP_SPRINTF_LEN 400 |
34dc7c2f | 632 | |
428870ff BB |
633 | /* |
634 | * This macro allows code sharing between zfs, libzpool, and mdb. | |
635 | * 'func' is either snprintf() or mdb_snprintf(). | |
636 | * 'ws' (whitespace) can be ' ' for single-line format, '\n' for multi-line. | |
637 | */ | |
5c27ec10 | 638 | #define SNPRINTF_BLKPTR(func, ws, buf, size, bp, type, checksum, compress) \ |
428870ff BB |
639 | { \ |
640 | static const char *copyname[] = \ | |
641 | { "zero", "single", "double", "triple" }; \ | |
428870ff BB |
642 | int len = 0; \ |
643 | int copies = 0; \ | |
5c27ec10 MA |
644 | const char *crypt_type; \ |
645 | if (bp != NULL) { \ | |
646 | if (BP_IS_ENCRYPTED(bp)) { \ | |
647 | crypt_type = "encrypted"; \ | |
648 | /* LINTED E_SUSPICIOUS_COMPARISON */ \ | |
649 | } else if (BP_IS_AUTHENTICATED(bp)) { \ | |
650 | crypt_type = "authenticated"; \ | |
651 | } else if (BP_HAS_INDIRECT_MAC_CKSUM(bp)) { \ | |
652 | crypt_type = "indirect-MAC"; \ | |
653 | } else { \ | |
654 | crypt_type = "unencrypted"; \ | |
655 | } \ | |
656 | } \ | |
428870ff | 657 | if (bp == NULL) { \ |
b0bc7a84 | 658 | len += func(buf + len, size - len, "<NULL>"); \ |
428870ff | 659 | } else if (BP_IS_HOLE(bp)) { \ |
a4069eef PS |
660 | len += func(buf + len, size - len, \ |
661 | "HOLE [L%llu %s] " \ | |
662 | "size=%llxL birth=%lluL", \ | |
663 | (u_longlong_t)BP_GET_LEVEL(bp), \ | |
664 | type, \ | |
665 | (u_longlong_t)BP_GET_LSIZE(bp), \ | |
666 | (u_longlong_t)bp->blk_birth); \ | |
9b67f605 MA |
667 | } else if (BP_IS_EMBEDDED(bp)) { \ |
668 | len = func(buf + len, size - len, \ | |
669 | "EMBEDDED [L%llu %s] et=%u %s " \ | |
670 | "size=%llxL/%llxP birth=%lluL", \ | |
671 | (u_longlong_t)BP_GET_LEVEL(bp), \ | |
672 | type, \ | |
673 | (int)BPE_GET_ETYPE(bp), \ | |
674 | compress, \ | |
675 | (u_longlong_t)BPE_GET_LSIZE(bp), \ | |
676 | (u_longlong_t)BPE_GET_PSIZE(bp), \ | |
677 | (u_longlong_t)bp->blk_birth); \ | |
428870ff | 678 | } else { \ |
1c27024e | 679 | for (int d = 0; d < BP_GET_NDVAS(bp); d++) { \ |
428870ff BB |
680 | const dva_t *dva = &bp->blk_dva[d]; \ |
681 | if (DVA_IS_VALID(dva)) \ | |
682 | copies++; \ | |
683 | len += func(buf + len, size - len, \ | |
684 | "DVA[%d]=<%llu:%llx:%llx>%c", d, \ | |
685 | (u_longlong_t)DVA_GET_VDEV(dva), \ | |
686 | (u_longlong_t)DVA_GET_OFFSET(dva), \ | |
687 | (u_longlong_t)DVA_GET_ASIZE(dva), \ | |
688 | ws); \ | |
689 | } \ | |
b5256303 TC |
690 | if (BP_IS_ENCRYPTED(bp)) { \ |
691 | len += func(buf + len, size - len, \ | |
692 | "salt=%llx iv=%llx:%llx%c", \ | |
693 | (u_longlong_t)bp->blk_dva[2].dva_word[0], \ | |
694 | (u_longlong_t)bp->blk_dva[2].dva_word[1], \ | |
695 | (u_longlong_t)BP_GET_IV2(bp), \ | |
696 | ws); \ | |
697 | } \ | |
428870ff BB |
698 | if (BP_IS_GANG(bp) && \ |
699 | DVA_GET_ASIZE(&bp->blk_dva[2]) <= \ | |
700 | DVA_GET_ASIZE(&bp->blk_dva[1]) / 2) \ | |
701 | copies--; \ | |
702 | len += func(buf + len, size - len, \ | |
b5256303 | 703 | "[L%llu %s] %s %s %s %s %s %s %s%c" \ |
428870ff BB |
704 | "size=%llxL/%llxP birth=%lluL/%lluP fill=%llu%c" \ |
705 | "cksum=%llx:%llx:%llx:%llx", \ | |
706 | (u_longlong_t)BP_GET_LEVEL(bp), \ | |
707 | type, \ | |
708 | checksum, \ | |
709 | compress, \ | |
b5256303 | 710 | crypt_type, \ |
428870ff BB |
711 | BP_GET_BYTEORDER(bp) == 0 ? "BE" : "LE", \ |
712 | BP_IS_GANG(bp) ? "gang" : "contiguous", \ | |
713 | BP_GET_DEDUP(bp) ? "dedup" : "unique", \ | |
714 | copyname[copies], \ | |
715 | ws, \ | |
716 | (u_longlong_t)BP_GET_LSIZE(bp), \ | |
717 | (u_longlong_t)BP_GET_PSIZE(bp), \ | |
718 | (u_longlong_t)bp->blk_birth, \ | |
719 | (u_longlong_t)BP_PHYSICAL_BIRTH(bp), \ | |
9b67f605 | 720 | (u_longlong_t)BP_GET_FILL(bp), \ |
428870ff BB |
721 | ws, \ |
722 | (u_longlong_t)bp->blk_cksum.zc_word[0], \ | |
723 | (u_longlong_t)bp->blk_cksum.zc_word[1], \ | |
724 | (u_longlong_t)bp->blk_cksum.zc_word[2], \ | |
725 | (u_longlong_t)bp->blk_cksum.zc_word[3]); \ | |
726 | } \ | |
727 | ASSERT(len < size); \ | |
728 | } | |
729 | ||
34dc7c2f | 730 | #define BP_GET_BUFC_TYPE(bp) \ |
a6255b7f | 731 | (BP_IS_METADATA(bp) ? ARC_BUFC_METADATA : ARC_BUFC_DATA) |
428870ff BB |
732 | |
733 | typedef enum spa_import_type { | |
734 | SPA_IMPORT_EXISTING, | |
735 | SPA_IMPORT_ASSEMBLE | |
736 | } spa_import_type_t; | |
34dc7c2f BB |
737 | |
738 | /* state manipulation functions */ | |
739 | extern int spa_open(const char *pool, spa_t **, void *tag); | |
428870ff BB |
740 | extern int spa_open_rewind(const char *pool, spa_t **, void *tag, |
741 | nvlist_t *policy, nvlist_t **config); | |
9ae529ec CS |
742 | extern int spa_get_stats(const char *pool, nvlist_t **config, char *altroot, |
743 | size_t buflen); | |
b5256303 TC |
744 | extern int spa_create(const char *pool, nvlist_t *nvroot, nvlist_t *props, |
745 | nvlist_t *zplprops, struct dsl_crypto_params *dcp); | |
13fe0198 | 746 | extern int spa_import(char *pool, nvlist_t *config, nvlist_t *props, |
572e2857 | 747 | uint64_t flags); |
34dc7c2f BB |
748 | extern nvlist_t *spa_tryimport(nvlist_t *tryconfig); |
749 | extern int spa_destroy(char *pool); | |
fb5f0bc8 BB |
750 | extern int spa_export(char *pool, nvlist_t **oldconfig, boolean_t force, |
751 | boolean_t hardforce); | |
34dc7c2f BB |
752 | extern int spa_reset(char *pool); |
753 | extern void spa_async_request(spa_t *spa, int flag); | |
b128c09f | 754 | extern void spa_async_unrequest(spa_t *spa, int flag); |
34dc7c2f BB |
755 | extern void spa_async_suspend(spa_t *spa); |
756 | extern void spa_async_resume(spa_t *spa); | |
757 | extern spa_t *spa_inject_addref(char *pool); | |
758 | extern void spa_inject_delref(spa_t *spa); | |
428870ff BB |
759 | extern void spa_scan_stat_init(spa_t *spa); |
760 | extern int spa_scan_get_stats(spa_t *spa, pool_scan_stat_t *ps); | |
34dc7c2f | 761 | |
b128c09f BB |
762 | #define SPA_ASYNC_CONFIG_UPDATE 0x01 |
763 | #define SPA_ASYNC_REMOVE 0x02 | |
764 | #define SPA_ASYNC_PROBE 0x04 | |
765 | #define SPA_ASYNC_RESILVER_DONE 0x08 | |
766 | #define SPA_ASYNC_RESILVER 0x10 | |
9babb374 | 767 | #define SPA_ASYNC_AUTOEXPAND 0x20 |
428870ff BB |
768 | #define SPA_ASYNC_REMOVE_DONE 0x40 |
769 | #define SPA_ASYNC_REMOVE_STOP 0x80 | |
770 | ||
771 | /* | |
772 | * Controls the behavior of spa_vdev_remove(). | |
773 | */ | |
774 | #define SPA_REMOVE_UNSPARE 0x01 | |
775 | #define SPA_REMOVE_DONE 0x02 | |
34dc7c2f BB |
776 | |
777 | /* device manipulation */ | |
778 | extern int spa_vdev_add(spa_t *spa, nvlist_t *nvroot); | |
779 | extern int spa_vdev_attach(spa_t *spa, uint64_t guid, nvlist_t *nvroot, | |
780 | int replacing); | |
fb5f0bc8 BB |
781 | extern int spa_vdev_detach(spa_t *spa, uint64_t guid, uint64_t pguid, |
782 | int replace_done); | |
34dc7c2f | 783 | extern int spa_vdev_remove(spa_t *spa, uint64_t guid, boolean_t unspare); |
428870ff | 784 | extern boolean_t spa_vdev_remove_active(spa_t *spa); |
34dc7c2f | 785 | extern int spa_vdev_setpath(spa_t *spa, uint64_t guid, const char *newpath); |
9babb374 | 786 | extern int spa_vdev_setfru(spa_t *spa, uint64_t guid, const char *newfru); |
428870ff BB |
787 | extern int spa_vdev_split_mirror(spa_t *spa, char *newname, nvlist_t *config, |
788 | nvlist_t *props, boolean_t exp); | |
34dc7c2f BB |
789 | |
790 | /* spare state (which is global across all pools) */ | |
791 | extern void spa_spare_add(vdev_t *vd); | |
792 | extern void spa_spare_remove(vdev_t *vd); | |
b128c09f | 793 | extern boolean_t spa_spare_exists(uint64_t guid, uint64_t *pool, int *refcnt); |
34dc7c2f BB |
794 | extern void spa_spare_activate(vdev_t *vd); |
795 | ||
796 | /* L2ARC state (which is global across all pools) */ | |
797 | extern void spa_l2cache_add(vdev_t *vd); | |
798 | extern void spa_l2cache_remove(vdev_t *vd); | |
799 | extern boolean_t spa_l2cache_exists(uint64_t guid, uint64_t *pool); | |
800 | extern void spa_l2cache_activate(vdev_t *vd); | |
801 | extern void spa_l2cache_drop(spa_t *spa); | |
34dc7c2f | 802 | |
428870ff BB |
803 | /* scanning */ |
804 | extern int spa_scan(spa_t *spa, pool_scan_func_t func); | |
805 | extern int spa_scan_stop(spa_t *spa); | |
0ea05c64 | 806 | extern int spa_scrub_pause_resume(spa_t *spa, pool_scrub_cmd_t flag); |
34dc7c2f BB |
807 | |
808 | /* spa syncing */ | |
809 | extern void spa_sync(spa_t *spa, uint64_t txg); /* only for DMU use */ | |
810 | extern void spa_sync_allpools(void); | |
811 | ||
55d85d5a | 812 | extern int zfs_sync_pass_deferred_free; |
428870ff | 813 | |
b128c09f BB |
814 | /* spa namespace global mutex */ |
815 | extern kmutex_t spa_namespace_lock; | |
816 | ||
34dc7c2f BB |
817 | /* |
818 | * SPA configuration functions in spa_config.c | |
819 | */ | |
820 | ||
821 | #define SPA_CONFIG_UPDATE_POOL 0 | |
822 | #define SPA_CONFIG_UPDATE_VDEVS 1 | |
823 | ||
a1d477c2 | 824 | extern void spa_write_cachefile(spa_t *, boolean_t, boolean_t); |
34dc7c2f BB |
825 | extern void spa_config_load(void); |
826 | extern nvlist_t *spa_all_configs(uint64_t *); | |
827 | extern void spa_config_set(spa_t *spa, nvlist_t *config); | |
828 | extern nvlist_t *spa_config_generate(spa_t *spa, vdev_t *vd, uint64_t txg, | |
829 | int getstats); | |
830 | extern void spa_config_update(spa_t *spa, int what); | |
34dc7c2f BB |
831 | |
832 | /* | |
833 | * Miscellaneous SPA routines in spa_misc.c | |
834 | */ | |
835 | ||
836 | /* Namespace manipulation */ | |
837 | extern spa_t *spa_lookup(const char *name); | |
428870ff | 838 | extern spa_t *spa_add(const char *name, nvlist_t *config, const char *altroot); |
34dc7c2f BB |
839 | extern void spa_remove(spa_t *spa); |
840 | extern spa_t *spa_next(spa_t *prev); | |
841 | ||
842 | /* Refcount functions */ | |
843 | extern void spa_open_ref(spa_t *spa, void *tag); | |
844 | extern void spa_close(spa_t *spa, void *tag); | |
0c66c32d | 845 | extern void spa_async_close(spa_t *spa, void *tag); |
34dc7c2f BB |
846 | extern boolean_t spa_refcount_zero(spa_t *spa); |
847 | ||
428870ff | 848 | #define SCL_NONE 0x00 |
b128c09f BB |
849 | #define SCL_CONFIG 0x01 |
850 | #define SCL_STATE 0x02 | |
851 | #define SCL_L2ARC 0x04 /* hack until L2ARC 2.0 */ | |
852 | #define SCL_ALLOC 0x08 | |
853 | #define SCL_ZIO 0x10 | |
854 | #define SCL_FREE 0x20 | |
855 | #define SCL_VDEV 0x40 | |
856 | #define SCL_LOCKS 7 | |
857 | #define SCL_ALL ((1 << SCL_LOCKS) - 1) | |
858 | #define SCL_STATE_ALL (SCL_STATE | SCL_L2ARC | SCL_ZIO) | |
859 | ||
1421c891 PS |
860 | /* Historical pool statistics */ |
861 | typedef struct spa_stats_history { | |
862 | kmutex_t lock; | |
863 | uint64_t count; | |
864 | uint64_t size; | |
865 | kstat_t *kstat; | |
866 | void *private; | |
867 | list_t list; | |
868 | } spa_stats_history_t; | |
869 | ||
870 | typedef struct spa_stats { | |
871 | spa_stats_history_t read_history; | |
0b1401ee | 872 | spa_stats_history_t txg_history; |
2d37239a | 873 | spa_stats_history_t tx_assign_histogram; |
330847ff | 874 | spa_stats_history_t io_history; |
379ca9cf | 875 | spa_stats_history_t mmp_history; |
f0ed6c74 | 876 | spa_stats_history_t state; /* pool state */ |
1421c891 PS |
877 | } spa_stats_t; |
878 | ||
0b1401ee BB |
879 | typedef enum txg_state { |
880 | TXG_STATE_BIRTH = 0, | |
881 | TXG_STATE_OPEN = 1, | |
882 | TXG_STATE_QUIESCED = 2, | |
478d64fd IL |
883 | TXG_STATE_WAIT_FOR_SYNC = 3, |
884 | TXG_STATE_SYNCED = 4, | |
885 | TXG_STATE_COMMITTED = 5, | |
0b1401ee BB |
886 | } txg_state_t; |
887 | ||
baf67d15 BB |
888 | typedef struct txg_stat { |
889 | vdev_stat_t vs1; | |
890 | vdev_stat_t vs2; | |
891 | uint64_t txg; | |
892 | uint64_t ndirty; | |
893 | } txg_stat_t; | |
894 | ||
1421c891 PS |
895 | extern void spa_stats_init(spa_t *spa); |
896 | extern void spa_stats_destroy(spa_t *spa); | |
5dbd68a3 | 897 | extern void spa_read_history_add(spa_t *spa, const zbookmark_phys_t *zb, |
1421c891 | 898 | uint32_t aflags); |
01b738f4 | 899 | extern void spa_txg_history_add(spa_t *spa, uint64_t txg, hrtime_t birth_time); |
0b1401ee BB |
900 | extern int spa_txg_history_set(spa_t *spa, uint64_t txg, |
901 | txg_state_t completed_state, hrtime_t completed_time); | |
baf67d15 BB |
902 | extern txg_stat_t *spa_txg_history_init_io(spa_t *, uint64_t, |
903 | struct dsl_pool *); | |
904 | extern void spa_txg_history_fini_io(spa_t *, txg_stat_t *); | |
2d37239a | 905 | extern void spa_tx_assign_add_nsecs(spa_t *spa, uint64_t nsecs); |
d2160d05 | 906 | extern int spa_mmp_history_set_skip(spa_t *spa, uint64_t mmp_kstat_id); |
7088545d OF |
907 | extern int spa_mmp_history_set(spa_t *spa, uint64_t mmp_kstat_id, int io_error, |
908 | hrtime_t duration); | |
d2160d05 OF |
909 | extern void *spa_mmp_history_add(spa_t *spa, uint64_t txg, uint64_t timestamp, |
910 | uint64_t mmp_delay, vdev_t *vd, int label, uint64_t mmp_kstat_id, | |
911 | int error); | |
1421c891 | 912 | |
b128c09f BB |
913 | /* Pool configuration locks */ |
914 | extern int spa_config_tryenter(spa_t *spa, int locks, void *tag, krw_t rw); | |
915 | extern void spa_config_enter(spa_t *spa, int locks, void *tag, krw_t rw); | |
916 | extern void spa_config_exit(spa_t *spa, int locks, void *tag); | |
917 | extern int spa_config_held(spa_t *spa, int locks, krw_t rw); | |
34dc7c2f BB |
918 | |
919 | /* Pool vdev add/remove lock */ | |
920 | extern uint64_t spa_vdev_enter(spa_t *spa); | |
428870ff BB |
921 | extern uint64_t spa_vdev_config_enter(spa_t *spa); |
922 | extern void spa_vdev_config_exit(spa_t *spa, vdev_t *vd, uint64_t txg, | |
923 | int error, char *tag); | |
34dc7c2f BB |
924 | extern int spa_vdev_exit(spa_t *spa, vdev_t *vd, uint64_t txg, int error); |
925 | ||
b128c09f | 926 | /* Pool vdev state change lock */ |
428870ff | 927 | extern void spa_vdev_state_enter(spa_t *spa, int oplock); |
b128c09f BB |
928 | extern int spa_vdev_state_exit(spa_t *spa, vdev_t *vd, int error); |
929 | ||
428870ff BB |
930 | /* Log state */ |
931 | typedef enum spa_log_state { | |
932 | SPA_LOG_UNKNOWN = 0, /* unknown log state */ | |
933 | SPA_LOG_MISSING, /* missing log(s) */ | |
934 | SPA_LOG_CLEAR, /* clear the log(s) */ | |
935 | SPA_LOG_GOOD, /* log(s) are good */ | |
936 | } spa_log_state_t; | |
937 | ||
938 | extern spa_log_state_t spa_get_log_state(spa_t *spa); | |
939 | extern void spa_set_log_state(spa_t *spa, spa_log_state_t state); | |
a1d477c2 | 940 | extern int spa_reset_logs(spa_t *spa); |
428870ff BB |
941 | |
942 | /* Log claim callback */ | |
943 | extern void spa_claim_notify(zio_t *zio); | |
cc92e9d0 | 944 | extern void spa_deadman(void *); |
428870ff | 945 | |
34dc7c2f | 946 | /* Accessor functions */ |
b128c09f | 947 | extern boolean_t spa_shutting_down(spa_t *spa); |
34dc7c2f | 948 | extern struct dsl_pool *spa_get_dsl(spa_t *spa); |
9ae529ec | 949 | extern boolean_t spa_is_initializing(spa_t *spa); |
a1d477c2 | 950 | extern boolean_t spa_indirect_vdevs_loaded(spa_t *spa); |
34dc7c2f BB |
951 | extern blkptr_t *spa_get_rootblkptr(spa_t *spa); |
952 | extern void spa_set_rootblkptr(spa_t *spa, const blkptr_t *bp); | |
953 | extern void spa_altroot(spa_t *, char *, size_t); | |
954 | extern int spa_sync_pass(spa_t *spa); | |
955 | extern char *spa_name(spa_t *spa); | |
956 | extern uint64_t spa_guid(spa_t *spa); | |
3541dc6d | 957 | extern uint64_t spa_load_guid(spa_t *spa); |
34dc7c2f BB |
958 | extern uint64_t spa_last_synced_txg(spa_t *spa); |
959 | extern uint64_t spa_first_txg(spa_t *spa); | |
428870ff | 960 | extern uint64_t spa_syncing_txg(spa_t *spa); |
3b7f360c | 961 | extern uint64_t spa_final_dirty_txg(spa_t *spa); |
34dc7c2f | 962 | extern uint64_t spa_version(spa_t *spa); |
b128c09f | 963 | extern pool_state_t spa_state(spa_t *spa); |
428870ff | 964 | extern spa_load_state_t spa_load_state(spa_t *spa); |
34dc7c2f | 965 | extern uint64_t spa_freeze_txg(spa_t *spa); |
3ec3bc21 | 966 | extern uint64_t spa_get_worst_case_asize(spa_t *spa, uint64_t lsize); |
428870ff | 967 | extern uint64_t spa_get_dspace(spa_t *spa); |
0c60cc32 | 968 | extern uint64_t spa_get_slop_space(spa_t *spa); |
428870ff | 969 | extern void spa_update_dspace(spa_t *spa); |
34dc7c2f | 970 | extern uint64_t spa_version(spa_t *spa); |
428870ff BB |
971 | extern boolean_t spa_deflate(spa_t *spa); |
972 | extern metaslab_class_t *spa_normal_class(spa_t *spa); | |
973 | extern metaslab_class_t *spa_log_class(spa_t *spa); | |
0c66c32d JG |
974 | extern void spa_evicting_os_register(spa_t *, objset_t *os); |
975 | extern void spa_evicting_os_deregister(spa_t *, objset_t *os); | |
976 | extern void spa_evicting_os_wait(spa_t *spa); | |
34dc7c2f | 977 | extern int spa_max_replication(spa_t *spa); |
428870ff | 978 | extern int spa_prev_software_version(spa_t *spa); |
8fb1ede1 BB |
979 | extern uint64_t spa_get_failmode(spa_t *spa); |
980 | extern uint64_t spa_get_deadman_failmode(spa_t *spa); | |
981 | extern void spa_set_deadman_failmode(spa_t *spa, const char *failmode); | |
b128c09f | 982 | extern boolean_t spa_suspended(spa_t *spa); |
428870ff BB |
983 | extern uint64_t spa_bootfs(spa_t *spa); |
984 | extern uint64_t spa_delegation(spa_t *spa); | |
985 | extern objset_t *spa_meta_objset(spa_t *spa); | |
cc92e9d0 | 986 | extern uint64_t spa_deadman_synctime(spa_t *spa); |
8fb1ede1 | 987 | extern uint64_t spa_deadman_ziotime(spa_t *spa); |
34dc7c2f BB |
988 | |
989 | /* Miscellaneous support routines */ | |
4a0ee12a PZ |
990 | extern void spa_load_failed(spa_t *spa, const char *fmt, ...); |
991 | extern void spa_load_note(spa_t *spa, const char *fmt, ...); | |
b0bc7a84 MG |
992 | extern void spa_activate_mos_feature(spa_t *spa, const char *feature, |
993 | dmu_tx_t *tx); | |
9ae529ec | 994 | extern void spa_deactivate_mos_feature(spa_t *spa, const char *feature); |
34dc7c2f | 995 | extern int spa_rename(const char *oldname, const char *newname); |
572e2857 | 996 | extern spa_t *spa_by_guid(uint64_t pool_guid, uint64_t device_guid); |
34dc7c2f BB |
997 | extern boolean_t spa_guid_exists(uint64_t pool_guid, uint64_t device_guid); |
998 | extern char *spa_strdup(const char *); | |
999 | extern void spa_strfree(char *); | |
1000 | extern uint64_t spa_get_random(uint64_t range); | |
428870ff | 1001 | extern uint64_t spa_generate_guid(spa_t *spa); |
b0bc7a84 | 1002 | extern void snprintf_blkptr(char *buf, size_t buflen, const blkptr_t *bp); |
34dc7c2f | 1003 | extern void spa_freeze(spa_t *spa); |
3541dc6d | 1004 | extern int spa_change_guid(spa_t *spa); |
34dc7c2f BB |
1005 | extern void spa_upgrade(spa_t *spa, uint64_t version); |
1006 | extern void spa_evict_all(void); | |
b128c09f BB |
1007 | extern vdev_t *spa_lookup_by_guid(spa_t *spa, uint64_t guid, |
1008 | boolean_t l2cache); | |
34dc7c2f | 1009 | extern boolean_t spa_has_spare(spa_t *, uint64_t guid); |
428870ff BB |
1010 | extern uint64_t dva_get_dsize_sync(spa_t *spa, const dva_t *dva); |
1011 | extern uint64_t bp_get_dsize_sync(spa_t *spa, const blkptr_t *bp); | |
1012 | extern uint64_t bp_get_dsize(spa_t *spa, const blkptr_t *bp); | |
34dc7c2f | 1013 | extern boolean_t spa_has_slogs(spa_t *spa); |
b128c09f | 1014 | extern boolean_t spa_is_root(spa_t *spa); |
fb5f0bc8 | 1015 | extern boolean_t spa_writeable(spa_t *spa); |
acbad6ff | 1016 | extern boolean_t spa_has_pending_synctask(spa_t *spa); |
f1512ee6 | 1017 | extern int spa_maxblocksize(spa_t *spa); |
50c957f7 | 1018 | extern int spa_maxdnodesize(spa_t *spa); |
63e3a861 | 1019 | extern void zfs_blkptr_verify(spa_t *spa, const blkptr_t *bp); |
6cb8e530 PZ |
1020 | extern boolean_t zfs_dva_valid(spa_t *spa, const dva_t *dva, |
1021 | const blkptr_t *bp); | |
a1d477c2 MA |
1022 | typedef void (*spa_remap_cb_t)(uint64_t vdev, uint64_t offset, uint64_t size, |
1023 | void *arg); | |
1024 | extern boolean_t spa_remap_blkptr(spa_t *spa, blkptr_t *bp, | |
1025 | spa_remap_cb_t callback, void *arg); | |
1026 | extern uint64_t spa_get_last_removal_txg(spa_t *spa); | |
6cb8e530 PZ |
1027 | extern boolean_t spa_trust_config(spa_t *spa); |
1028 | extern uint64_t spa_missing_tvds_allowed(spa_t *spa); | |
1029 | extern void spa_set_missing_tvds(spa_t *spa, uint64_t missing); | |
379ca9cf OF |
1030 | extern boolean_t spa_multihost(spa_t *spa); |
1031 | extern unsigned long spa_get_hostid(void); | |
428870ff | 1032 | |
fb5f0bc8 | 1033 | extern int spa_mode(spa_t *spa); |
e19572e4 | 1034 | extern uint64_t zfs_strtonum(const char *str, char **nptr); |
34dc7c2f | 1035 | |
34dc7c2f BB |
1036 | extern char *spa_his_ievent_table[]; |
1037 | ||
1038 | extern void spa_history_create_obj(spa_t *spa, dmu_tx_t *tx); | |
1039 | extern int spa_history_get(spa_t *spa, uint64_t *offset, uint64_t *len_read, | |
1040 | char *his_buf); | |
6f1ffb06 MA |
1041 | extern int spa_history_log(spa_t *spa, const char *his_buf); |
1042 | extern int spa_history_log_nvl(spa_t *spa, nvlist_t *nvl); | |
d5e024cb BB |
1043 | extern void spa_history_log_version(spa_t *spa, const char *operation, |
1044 | dmu_tx_t *tx); | |
6f1ffb06 MA |
1045 | extern void spa_history_log_internal(spa_t *spa, const char *operation, |
1046 | dmu_tx_t *tx, const char *fmt, ...); | |
1047 | extern void spa_history_log_internal_ds(struct dsl_dataset *ds, const char *op, | |
1048 | dmu_tx_t *tx, const char *fmt, ...); | |
1049 | extern void spa_history_log_internal_dd(dsl_dir_t *dd, const char *operation, | |
1050 | dmu_tx_t *tx, const char *fmt, ...); | |
34dc7c2f | 1051 | |
f0ed6c74 TH |
1052 | extern const char *spa_state_to_name(spa_t *spa); |
1053 | ||
34dc7c2f | 1054 | /* error handling */ |
5dbd68a3 | 1055 | struct zbookmark_phys; |
b5256303 | 1056 | extern void spa_log_error(spa_t *spa, const zbookmark_phys_t *zb); |
34dc7c2f | 1057 | extern void zfs_ereport_post(const char *class, spa_t *spa, vdev_t *vd, |
a2c2ed1b TC |
1058 | const zbookmark_phys_t *zb, zio_t *zio, uint64_t stateoroffset, |
1059 | uint64_t length); | |
12fa0466 DE |
1060 | extern nvlist_t *zfs_event_create(spa_t *spa, vdev_t *vd, const char *type, |
1061 | const char *name, nvlist_t *aux); | |
34dc7c2f | 1062 | extern void zfs_post_remove(spa_t *spa, vdev_t *vd); |
d02ca379 | 1063 | extern void zfs_post_state_change(spa_t *spa, vdev_t *vd, uint64_t laststate); |
34dc7c2f BB |
1064 | extern void zfs_post_autoreplace(spa_t *spa, vdev_t *vd); |
1065 | extern uint64_t spa_get_errlog_size(spa_t *spa); | |
1066 | extern int spa_get_errlog(spa_t *spa, void *uaddr, size_t *count); | |
1067 | extern void spa_errlog_rotate(spa_t *spa); | |
1068 | extern void spa_errlog_drain(spa_t *spa); | |
1069 | extern void spa_errlog_sync(spa_t *spa, uint64_t txg); | |
1070 | extern void spa_get_errlists(spa_t *spa, avl_tree_t *last, avl_tree_t *scrub); | |
1071 | ||
1072 | /* vdev cache */ | |
1073 | extern void vdev_cache_stat_init(void); | |
1074 | extern void vdev_cache_stat_fini(void); | |
1075 | ||
551905dd GN |
1076 | /* vdev mirror */ |
1077 | extern void vdev_mirror_stat_init(void); | |
1078 | extern void vdev_mirror_stat_fini(void); | |
1079 | ||
34dc7c2f BB |
1080 | /* Initialization and termination */ |
1081 | extern void spa_init(int flags); | |
1082 | extern void spa_fini(void); | |
0bc8fd78 | 1083 | extern void spa_boot_init(void); |
34dc7c2f BB |
1084 | |
1085 | /* properties */ | |
1086 | extern int spa_prop_set(spa_t *spa, nvlist_t *nvp); | |
1087 | extern int spa_prop_get(spa_t *spa, nvlist_t **nvp); | |
1088 | extern void spa_prop_clear_bootfs(spa_t *spa, uint64_t obj, dmu_tx_t *tx); | |
d164b209 | 1089 | extern void spa_configfile_set(spa_t *, nvlist_t *, boolean_t); |
34dc7c2f BB |
1090 | |
1091 | /* asynchronous event notification */ | |
12fa0466 DE |
1092 | extern void spa_event_notify(spa_t *spa, vdev_t *vdev, nvlist_t *hist_nvl, |
1093 | const char *name); | |
34dc7c2f BB |
1094 | |
1095 | #ifdef ZFS_DEBUG | |
79c76d5b BB |
1096 | #define dprintf_bp(bp, fmt, ...) do { \ |
1097 | if (zfs_flags & ZFS_DEBUG_DPRINTF) { \ | |
1098 | char *__blkbuf = kmem_alloc(BP_SPRINTF_LEN, KM_SLEEP); \ | |
1099 | snprintf_blkptr(__blkbuf, BP_SPRINTF_LEN, (bp)); \ | |
1100 | dprintf(fmt " %s\n", __VA_ARGS__, __blkbuf); \ | |
1101 | kmem_free(__blkbuf, BP_SPRINTF_LEN); \ | |
34dc7c2f BB |
1102 | } \ |
1103 | _NOTE(CONSTCOND) } while (0) | |
1104 | #else | |
1105 | #define dprintf_bp(bp, fmt, ...) | |
1106 | #endif | |
1107 | ||
fb5f0bc8 | 1108 | extern int spa_mode_global; /* mode, e.g. FREAD | FWRITE */ |
8fb1ede1 BB |
1109 | extern int zfs_deadman_enabled; |
1110 | extern unsigned long zfs_deadman_synctime_ms; | |
1111 | extern unsigned long zfs_deadman_ziotime_ms; | |
1112 | extern unsigned long zfs_deadman_checktime_ms; | |
34dc7c2f BB |
1113 | |
1114 | #ifdef __cplusplus | |
1115 | } | |
1116 | #endif | |
1117 | ||
1118 | #endif /* _SYS_SPA_H */ |