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5056 ZFS deadlock on db_mtx and dn_holds
Reviewed by: Will Andrews <willa@spectralogic.com>
Reviewed by: Matt Ahrens <mahrens@delphix.com>
Reviewed by: George Wilson <george.wilson@delphix.com>
Approved by: Dan McDonald <danmcd@omniti.com>
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--- old/usr/src/uts/common/fs/zfs/sys/spa.h
+++ new/usr/src/uts/common/fs/zfs/sys/spa.h
1 1 /*
2 2 * CDDL HEADER START
3 3 *
4 4 * The contents of this file are subject to the terms of the
5 5 * Common Development and Distribution License (the "License").
6 6 * You may not use this file except in compliance with the License.
7 7 *
8 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 9 * or http://www.opensolaris.org/os/licensing.
10 10 * See the License for the specific language governing permissions
11 11 * and limitations under the License.
12 12 *
13 13 * When distributing Covered Code, include this CDDL HEADER in each
14 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
|
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14 lines elided |
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15 15 * If applicable, add the following below this CDDL HEADER, with the
16 16 * fields enclosed by brackets "[]" replaced with your own identifying
17 17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 18 *
19 19 * CDDL HEADER END
20 20 */
21 21 /*
22 22 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
23 23 * Copyright (c) 2011, 2014 by Delphix. All rights reserved.
24 24 * Copyright 2011 Nexenta Systems, Inc. All rights reserved.
25 + * Copyright (c) 2014 Spectra Logic Corporation, All rights reserved.
25 26 */
26 27
27 28 #ifndef _SYS_SPA_H
28 29 #define _SYS_SPA_H
29 30
30 31 #include <sys/avl.h>
31 32 #include <sys/zfs_context.h>
32 33 #include <sys/nvpair.h>
33 34 #include <sys/sysmacros.h>
34 35 #include <sys/types.h>
35 36 #include <sys/fs/zfs.h>
36 37
37 38 #ifdef __cplusplus
38 39 extern "C" {
39 40 #endif
40 41
41 42 /*
42 43 * Forward references that lots of things need.
43 44 */
44 45 typedef struct spa spa_t;
45 46 typedef struct vdev vdev_t;
46 47 typedef struct metaslab metaslab_t;
47 48 typedef struct metaslab_group metaslab_group_t;
48 49 typedef struct metaslab_class metaslab_class_t;
49 50 typedef struct zio zio_t;
50 51 typedef struct zilog zilog_t;
51 52 typedef struct spa_aux_vdev spa_aux_vdev_t;
52 53 typedef struct ddt ddt_t;
53 54 typedef struct ddt_entry ddt_entry_t;
54 55 struct dsl_pool;
55 56 struct dsl_dataset;
56 57
57 58 /*
58 59 * General-purpose 32-bit and 64-bit bitfield encodings.
59 60 */
60 61 #define BF32_DECODE(x, low, len) P2PHASE((x) >> (low), 1U << (len))
61 62 #define BF64_DECODE(x, low, len) P2PHASE((x) >> (low), 1ULL << (len))
62 63 #define BF32_ENCODE(x, low, len) (P2PHASE((x), 1U << (len)) << (low))
63 64 #define BF64_ENCODE(x, low, len) (P2PHASE((x), 1ULL << (len)) << (low))
64 65
65 66 #define BF32_GET(x, low, len) BF32_DECODE(x, low, len)
66 67 #define BF64_GET(x, low, len) BF64_DECODE(x, low, len)
67 68
68 69 #define BF32_SET(x, low, len, val) do { \
69 70 ASSERT3U(val, <, 1U << (len)); \
70 71 ASSERT3U(low + len, <=, 32); \
71 72 (x) ^= BF32_ENCODE((x >> low) ^ (val), low, len); \
72 73 _NOTE(CONSTCOND) } while (0)
73 74
74 75 #define BF64_SET(x, low, len, val) do { \
75 76 ASSERT3U(val, <, 1ULL << (len)); \
76 77 ASSERT3U(low + len, <=, 64); \
77 78 ((x) ^= BF64_ENCODE((x >> low) ^ (val), low, len)); \
78 79 _NOTE(CONSTCOND) } while (0)
79 80
80 81 #define BF32_GET_SB(x, low, len, shift, bias) \
81 82 ((BF32_GET(x, low, len) + (bias)) << (shift))
82 83 #define BF64_GET_SB(x, low, len, shift, bias) \
83 84 ((BF64_GET(x, low, len) + (bias)) << (shift))
84 85
85 86 #define BF32_SET_SB(x, low, len, shift, bias, val) do { \
86 87 ASSERT(IS_P2ALIGNED(val, 1U << shift)); \
87 88 ASSERT3S((val) >> (shift), >=, bias); \
88 89 BF32_SET(x, low, len, ((val) >> (shift)) - (bias)); \
89 90 _NOTE(CONSTCOND) } while (0)
90 91 #define BF64_SET_SB(x, low, len, shift, bias, val) do { \
91 92 ASSERT(IS_P2ALIGNED(val, 1ULL << shift)); \
92 93 ASSERT3S((val) >> (shift), >=, bias); \
93 94 BF64_SET(x, low, len, ((val) >> (shift)) - (bias)); \
94 95 _NOTE(CONSTCOND) } while (0)
95 96
96 97 /*
97 98 * We currently support block sizes from 512 bytes to 16MB.
98 99 * The benefits of larger blocks, and thus larger IO, need to be weighed
99 100 * against the cost of COWing a giant block to modify one byte, and the
100 101 * large latency of reading or writing a large block.
101 102 *
102 103 * Note that although blocks up to 16MB are supported, the recordsize
103 104 * property can not be set larger than zfs_max_recordsize (default 1MB).
104 105 * See the comment near zfs_max_recordsize in dsl_dataset.c for details.
105 106 *
106 107 * Note that although the LSIZE field of the blkptr_t can store sizes up
107 108 * to 32MB, the dnode's dn_datablkszsec can only store sizes up to
108 109 * 32MB - 512 bytes. Therefore, we limit SPA_MAXBLOCKSIZE to 16MB.
109 110 */
110 111 #define SPA_MINBLOCKSHIFT 9
111 112 #define SPA_OLD_MAXBLOCKSHIFT 17
112 113 #define SPA_MAXBLOCKSHIFT 24
113 114 #define SPA_MINBLOCKSIZE (1ULL << SPA_MINBLOCKSHIFT)
114 115 #define SPA_OLD_MAXBLOCKSIZE (1ULL << SPA_OLD_MAXBLOCKSHIFT)
115 116 #define SPA_MAXBLOCKSIZE (1ULL << SPA_MAXBLOCKSHIFT)
116 117
117 118 /*
118 119 * Size of block to hold the configuration data (a packed nvlist)
119 120 */
120 121 #define SPA_CONFIG_BLOCKSIZE (1ULL << 14)
121 122
122 123 /*
123 124 * The DVA size encodings for LSIZE and PSIZE support blocks up to 32MB.
124 125 * The ASIZE encoding should be at least 64 times larger (6 more bits)
125 126 * to support up to 4-way RAID-Z mirror mode with worst-case gang block
126 127 * overhead, three DVAs per bp, plus one more bit in case we do anything
127 128 * else that expands the ASIZE.
128 129 */
129 130 #define SPA_LSIZEBITS 16 /* LSIZE up to 32M (2^16 * 512) */
130 131 #define SPA_PSIZEBITS 16 /* PSIZE up to 32M (2^16 * 512) */
131 132 #define SPA_ASIZEBITS 24 /* ASIZE up to 64 times larger */
132 133
133 134 /*
134 135 * All SPA data is represented by 128-bit data virtual addresses (DVAs).
135 136 * The members of the dva_t should be considered opaque outside the SPA.
136 137 */
137 138 typedef struct dva {
138 139 uint64_t dva_word[2];
139 140 } dva_t;
140 141
141 142 /*
142 143 * Each block has a 256-bit checksum -- strong enough for cryptographic hashes.
143 144 */
144 145 typedef struct zio_cksum {
145 146 uint64_t zc_word[4];
146 147 } zio_cksum_t;
147 148
148 149 /*
149 150 * Each block is described by its DVAs, time of birth, checksum, etc.
150 151 * The word-by-word, bit-by-bit layout of the blkptr is as follows:
151 152 *
152 153 * 64 56 48 40 32 24 16 8 0
153 154 * +-------+-------+-------+-------+-------+-------+-------+-------+
154 155 * 0 | vdev1 | GRID | ASIZE |
155 156 * +-------+-------+-------+-------+-------+-------+-------+-------+
156 157 * 1 |G| offset1 |
157 158 * +-------+-------+-------+-------+-------+-------+-------+-------+
158 159 * 2 | vdev2 | GRID | ASIZE |
159 160 * +-------+-------+-------+-------+-------+-------+-------+-------+
160 161 * 3 |G| offset2 |
161 162 * +-------+-------+-------+-------+-------+-------+-------+-------+
162 163 * 4 | vdev3 | GRID | ASIZE |
163 164 * +-------+-------+-------+-------+-------+-------+-------+-------+
164 165 * 5 |G| offset3 |
165 166 * +-------+-------+-------+-------+-------+-------+-------+-------+
166 167 * 6 |BDX|lvl| type | cksum |E| comp| PSIZE | LSIZE |
167 168 * +-------+-------+-------+-------+-------+-------+-------+-------+
168 169 * 7 | padding |
169 170 * +-------+-------+-------+-------+-------+-------+-------+-------+
170 171 * 8 | padding |
171 172 * +-------+-------+-------+-------+-------+-------+-------+-------+
172 173 * 9 | physical birth txg |
173 174 * +-------+-------+-------+-------+-------+-------+-------+-------+
174 175 * a | logical birth txg |
175 176 * +-------+-------+-------+-------+-------+-------+-------+-------+
176 177 * b | fill count |
177 178 * +-------+-------+-------+-------+-------+-------+-------+-------+
178 179 * c | checksum[0] |
179 180 * +-------+-------+-------+-------+-------+-------+-------+-------+
180 181 * d | checksum[1] |
181 182 * +-------+-------+-------+-------+-------+-------+-------+-------+
182 183 * e | checksum[2] |
183 184 * +-------+-------+-------+-------+-------+-------+-------+-------+
184 185 * f | checksum[3] |
185 186 * +-------+-------+-------+-------+-------+-------+-------+-------+
186 187 *
187 188 * Legend:
188 189 *
189 190 * vdev virtual device ID
190 191 * offset offset into virtual device
191 192 * LSIZE logical size
192 193 * PSIZE physical size (after compression)
193 194 * ASIZE allocated size (including RAID-Z parity and gang block headers)
194 195 * GRID RAID-Z layout information (reserved for future use)
195 196 * cksum checksum function
196 197 * comp compression function
197 198 * G gang block indicator
198 199 * B byteorder (endianness)
199 200 * D dedup
200 201 * X encryption (on version 30, which is not supported)
201 202 * E blkptr_t contains embedded data (see below)
202 203 * lvl level of indirection
203 204 * type DMU object type
204 205 * phys birth txg of block allocation; zero if same as logical birth txg
205 206 * log. birth transaction group in which the block was logically born
206 207 * fill count number of non-zero blocks under this bp
207 208 * checksum[4] 256-bit checksum of the data this bp describes
208 209 */
209 210
210 211 /*
211 212 * "Embedded" blkptr_t's don't actually point to a block, instead they
212 213 * have a data payload embedded in the blkptr_t itself. See the comment
213 214 * in blkptr.c for more details.
214 215 *
215 216 * The blkptr_t is laid out as follows:
216 217 *
217 218 * 64 56 48 40 32 24 16 8 0
218 219 * +-------+-------+-------+-------+-------+-------+-------+-------+
219 220 * 0 | payload |
220 221 * 1 | payload |
221 222 * 2 | payload |
222 223 * 3 | payload |
223 224 * 4 | payload |
224 225 * 5 | payload |
225 226 * +-------+-------+-------+-------+-------+-------+-------+-------+
226 227 * 6 |BDX|lvl| type | etype |E| comp| PSIZE| LSIZE |
227 228 * +-------+-------+-------+-------+-------+-------+-------+-------+
228 229 * 7 | payload |
229 230 * 8 | payload |
230 231 * 9 | payload |
231 232 * +-------+-------+-------+-------+-------+-------+-------+-------+
232 233 * a | logical birth txg |
233 234 * +-------+-------+-------+-------+-------+-------+-------+-------+
234 235 * b | payload |
235 236 * c | payload |
236 237 * d | payload |
237 238 * e | payload |
238 239 * f | payload |
239 240 * +-------+-------+-------+-------+-------+-------+-------+-------+
240 241 *
241 242 * Legend:
242 243 *
243 244 * payload contains the embedded data
244 245 * B (byteorder) byteorder (endianness)
245 246 * D (dedup) padding (set to zero)
246 247 * X encryption (set to zero; see above)
247 248 * E (embedded) set to one
248 249 * lvl indirection level
249 250 * type DMU object type
250 251 * etype how to interpret embedded data (BP_EMBEDDED_TYPE_*)
251 252 * comp compression function of payload
252 253 * PSIZE size of payload after compression, in bytes
253 254 * LSIZE logical size of payload, in bytes
254 255 * note that 25 bits is enough to store the largest
255 256 * "normal" BP's LSIZE (2^16 * 2^9) in bytes
256 257 * log. birth transaction group in which the block was logically born
257 258 *
258 259 * Note that LSIZE and PSIZE are stored in bytes, whereas for non-embedded
259 260 * bp's they are stored in units of SPA_MINBLOCKSHIFT.
260 261 * Generally, the generic BP_GET_*() macros can be used on embedded BP's.
261 262 * The B, D, X, lvl, type, and comp fields are stored the same as with normal
262 263 * BP's so the BP_SET_* macros can be used with them. etype, PSIZE, LSIZE must
263 264 * be set with the BPE_SET_* macros. BP_SET_EMBEDDED() should be called before
264 265 * other macros, as they assert that they are only used on BP's of the correct
265 266 * "embedded-ness".
266 267 */
267 268
268 269 #define BPE_GET_ETYPE(bp) \
269 270 (ASSERT(BP_IS_EMBEDDED(bp)), \
270 271 BF64_GET((bp)->blk_prop, 40, 8))
271 272 #define BPE_SET_ETYPE(bp, t) do { \
272 273 ASSERT(BP_IS_EMBEDDED(bp)); \
273 274 BF64_SET((bp)->blk_prop, 40, 8, t); \
274 275 _NOTE(CONSTCOND) } while (0)
275 276
276 277 #define BPE_GET_LSIZE(bp) \
277 278 (ASSERT(BP_IS_EMBEDDED(bp)), \
278 279 BF64_GET_SB((bp)->blk_prop, 0, 25, 0, 1))
279 280 #define BPE_SET_LSIZE(bp, x) do { \
280 281 ASSERT(BP_IS_EMBEDDED(bp)); \
281 282 BF64_SET_SB((bp)->blk_prop, 0, 25, 0, 1, x); \
282 283 _NOTE(CONSTCOND) } while (0)
283 284
284 285 #define BPE_GET_PSIZE(bp) \
285 286 (ASSERT(BP_IS_EMBEDDED(bp)), \
286 287 BF64_GET_SB((bp)->blk_prop, 25, 7, 0, 1))
287 288 #define BPE_SET_PSIZE(bp, x) do { \
288 289 ASSERT(BP_IS_EMBEDDED(bp)); \
289 290 BF64_SET_SB((bp)->blk_prop, 25, 7, 0, 1, x); \
290 291 _NOTE(CONSTCOND) } while (0)
291 292
292 293 typedef enum bp_embedded_type {
293 294 BP_EMBEDDED_TYPE_DATA,
294 295 BP_EMBEDDED_TYPE_RESERVED, /* Reserved for an unintegrated feature. */
295 296 NUM_BP_EMBEDDED_TYPES = BP_EMBEDDED_TYPE_RESERVED
296 297 } bp_embedded_type_t;
297 298
298 299 #define BPE_NUM_WORDS 14
299 300 #define BPE_PAYLOAD_SIZE (BPE_NUM_WORDS * sizeof (uint64_t))
300 301 #define BPE_IS_PAYLOADWORD(bp, wp) \
301 302 ((wp) != &(bp)->blk_prop && (wp) != &(bp)->blk_birth)
302 303
303 304 #define SPA_BLKPTRSHIFT 7 /* blkptr_t is 128 bytes */
304 305 #define SPA_DVAS_PER_BP 3 /* Number of DVAs in a bp */
305 306
306 307 /*
307 308 * A block is a hole when it has either 1) never been written to, or
308 309 * 2) is zero-filled. In both cases, ZFS can return all zeroes for all reads
309 310 * without physically allocating disk space. Holes are represented in the
310 311 * blkptr_t structure by zeroed blk_dva. Correct checking for holes is
311 312 * done through the BP_IS_HOLE macro. For holes, the logical size, level,
312 313 * DMU object type, and birth times are all also stored for holes that
313 314 * were written to at some point (i.e. were punched after having been filled).
314 315 */
315 316 typedef struct blkptr {
316 317 dva_t blk_dva[SPA_DVAS_PER_BP]; /* Data Virtual Addresses */
317 318 uint64_t blk_prop; /* size, compression, type, etc */
318 319 uint64_t blk_pad[2]; /* Extra space for the future */
319 320 uint64_t blk_phys_birth; /* txg when block was allocated */
320 321 uint64_t blk_birth; /* transaction group at birth */
321 322 uint64_t blk_fill; /* fill count */
322 323 zio_cksum_t blk_cksum; /* 256-bit checksum */
323 324 } blkptr_t;
324 325
325 326 /*
326 327 * Macros to get and set fields in a bp or DVA.
327 328 */
328 329 #define DVA_GET_ASIZE(dva) \
329 330 BF64_GET_SB((dva)->dva_word[0], 0, SPA_ASIZEBITS, SPA_MINBLOCKSHIFT, 0)
330 331 #define DVA_SET_ASIZE(dva, x) \
331 332 BF64_SET_SB((dva)->dva_word[0], 0, SPA_ASIZEBITS, \
332 333 SPA_MINBLOCKSHIFT, 0, x)
333 334
334 335 #define DVA_GET_GRID(dva) BF64_GET((dva)->dva_word[0], 24, 8)
335 336 #define DVA_SET_GRID(dva, x) BF64_SET((dva)->dva_word[0], 24, 8, x)
336 337
337 338 #define DVA_GET_VDEV(dva) BF64_GET((dva)->dva_word[0], 32, 32)
338 339 #define DVA_SET_VDEV(dva, x) BF64_SET((dva)->dva_word[0], 32, 32, x)
339 340
340 341 #define DVA_GET_OFFSET(dva) \
341 342 BF64_GET_SB((dva)->dva_word[1], 0, 63, SPA_MINBLOCKSHIFT, 0)
342 343 #define DVA_SET_OFFSET(dva, x) \
343 344 BF64_SET_SB((dva)->dva_word[1], 0, 63, SPA_MINBLOCKSHIFT, 0, x)
344 345
345 346 #define DVA_GET_GANG(dva) BF64_GET((dva)->dva_word[1], 63, 1)
346 347 #define DVA_SET_GANG(dva, x) BF64_SET((dva)->dva_word[1], 63, 1, x)
347 348
348 349 #define BP_GET_LSIZE(bp) \
349 350 (BP_IS_EMBEDDED(bp) ? \
350 351 (BPE_GET_ETYPE(bp) == BP_EMBEDDED_TYPE_DATA ? BPE_GET_LSIZE(bp) : 0): \
351 352 BF64_GET_SB((bp)->blk_prop, 0, SPA_LSIZEBITS, SPA_MINBLOCKSHIFT, 1))
352 353 #define BP_SET_LSIZE(bp, x) do { \
353 354 ASSERT(!BP_IS_EMBEDDED(bp)); \
354 355 BF64_SET_SB((bp)->blk_prop, \
355 356 0, SPA_LSIZEBITS, SPA_MINBLOCKSHIFT, 1, x); \
356 357 _NOTE(CONSTCOND) } while (0)
357 358
358 359 #define BP_GET_PSIZE(bp) \
359 360 (BP_IS_EMBEDDED(bp) ? 0 : \
360 361 BF64_GET_SB((bp)->blk_prop, 16, SPA_PSIZEBITS, SPA_MINBLOCKSHIFT, 1))
361 362 #define BP_SET_PSIZE(bp, x) do { \
362 363 ASSERT(!BP_IS_EMBEDDED(bp)); \
363 364 BF64_SET_SB((bp)->blk_prop, \
364 365 16, SPA_PSIZEBITS, SPA_MINBLOCKSHIFT, 1, x); \
365 366 _NOTE(CONSTCOND) } while (0)
366 367
367 368 #define BP_GET_COMPRESS(bp) BF64_GET((bp)->blk_prop, 32, 7)
368 369 #define BP_SET_COMPRESS(bp, x) BF64_SET((bp)->blk_prop, 32, 7, x)
369 370
370 371 #define BP_IS_EMBEDDED(bp) BF64_GET((bp)->blk_prop, 39, 1)
371 372 #define BP_SET_EMBEDDED(bp, x) BF64_SET((bp)->blk_prop, 39, 1, x)
372 373
373 374 #define BP_GET_CHECKSUM(bp) \
374 375 (BP_IS_EMBEDDED(bp) ? ZIO_CHECKSUM_OFF : \
375 376 BF64_GET((bp)->blk_prop, 40, 8))
376 377 #define BP_SET_CHECKSUM(bp, x) do { \
377 378 ASSERT(!BP_IS_EMBEDDED(bp)); \
378 379 BF64_SET((bp)->blk_prop, 40, 8, x); \
379 380 _NOTE(CONSTCOND) } while (0)
380 381
381 382 #define BP_GET_TYPE(bp) BF64_GET((bp)->blk_prop, 48, 8)
382 383 #define BP_SET_TYPE(bp, x) BF64_SET((bp)->blk_prop, 48, 8, x)
383 384
384 385 #define BP_GET_LEVEL(bp) BF64_GET((bp)->blk_prop, 56, 5)
385 386 #define BP_SET_LEVEL(bp, x) BF64_SET((bp)->blk_prop, 56, 5, x)
386 387
387 388 #define BP_GET_DEDUP(bp) BF64_GET((bp)->blk_prop, 62, 1)
388 389 #define BP_SET_DEDUP(bp, x) BF64_SET((bp)->blk_prop, 62, 1, x)
389 390
390 391 #define BP_GET_BYTEORDER(bp) BF64_GET((bp)->blk_prop, 63, 1)
391 392 #define BP_SET_BYTEORDER(bp, x) BF64_SET((bp)->blk_prop, 63, 1, x)
392 393
393 394 #define BP_PHYSICAL_BIRTH(bp) \
394 395 (BP_IS_EMBEDDED(bp) ? 0 : \
395 396 (bp)->blk_phys_birth ? (bp)->blk_phys_birth : (bp)->blk_birth)
396 397
397 398 #define BP_SET_BIRTH(bp, logical, physical) \
398 399 { \
399 400 ASSERT(!BP_IS_EMBEDDED(bp)); \
400 401 (bp)->blk_birth = (logical); \
401 402 (bp)->blk_phys_birth = ((logical) == (physical) ? 0 : (physical)); \
402 403 }
403 404
404 405 #define BP_GET_FILL(bp) (BP_IS_EMBEDDED(bp) ? 1 : (bp)->blk_fill)
405 406
406 407 #define BP_GET_ASIZE(bp) \
407 408 (BP_IS_EMBEDDED(bp) ? 0 : \
408 409 DVA_GET_ASIZE(&(bp)->blk_dva[0]) + \
409 410 DVA_GET_ASIZE(&(bp)->blk_dva[1]) + \
410 411 DVA_GET_ASIZE(&(bp)->blk_dva[2]))
411 412
412 413 #define BP_GET_UCSIZE(bp) \
413 414 ((BP_GET_LEVEL(bp) > 0 || DMU_OT_IS_METADATA(BP_GET_TYPE(bp))) ? \
414 415 BP_GET_PSIZE(bp) : BP_GET_LSIZE(bp))
415 416
416 417 #define BP_GET_NDVAS(bp) \
417 418 (BP_IS_EMBEDDED(bp) ? 0 : \
418 419 !!DVA_GET_ASIZE(&(bp)->blk_dva[0]) + \
419 420 !!DVA_GET_ASIZE(&(bp)->blk_dva[1]) + \
420 421 !!DVA_GET_ASIZE(&(bp)->blk_dva[2]))
421 422
422 423 #define BP_COUNT_GANG(bp) \
423 424 (BP_IS_EMBEDDED(bp) ? 0 : \
424 425 (DVA_GET_GANG(&(bp)->blk_dva[0]) + \
425 426 DVA_GET_GANG(&(bp)->blk_dva[1]) + \
426 427 DVA_GET_GANG(&(bp)->blk_dva[2])))
427 428
428 429 #define DVA_EQUAL(dva1, dva2) \
429 430 ((dva1)->dva_word[1] == (dva2)->dva_word[1] && \
430 431 (dva1)->dva_word[0] == (dva2)->dva_word[0])
431 432
432 433 #define BP_EQUAL(bp1, bp2) \
433 434 (BP_PHYSICAL_BIRTH(bp1) == BP_PHYSICAL_BIRTH(bp2) && \
434 435 (bp1)->blk_birth == (bp2)->blk_birth && \
435 436 DVA_EQUAL(&(bp1)->blk_dva[0], &(bp2)->blk_dva[0]) && \
436 437 DVA_EQUAL(&(bp1)->blk_dva[1], &(bp2)->blk_dva[1]) && \
437 438 DVA_EQUAL(&(bp1)->blk_dva[2], &(bp2)->blk_dva[2]))
438 439
439 440 #define ZIO_CHECKSUM_EQUAL(zc1, zc2) \
440 441 (0 == (((zc1).zc_word[0] - (zc2).zc_word[0]) | \
441 442 ((zc1).zc_word[1] - (zc2).zc_word[1]) | \
442 443 ((zc1).zc_word[2] - (zc2).zc_word[2]) | \
443 444 ((zc1).zc_word[3] - (zc2).zc_word[3])))
444 445
445 446 #define DVA_IS_VALID(dva) (DVA_GET_ASIZE(dva) != 0)
446 447
447 448 #define ZIO_SET_CHECKSUM(zcp, w0, w1, w2, w3) \
448 449 { \
449 450 (zcp)->zc_word[0] = w0; \
450 451 (zcp)->zc_word[1] = w1; \
451 452 (zcp)->zc_word[2] = w2; \
452 453 (zcp)->zc_word[3] = w3; \
453 454 }
454 455
455 456 #define BP_IDENTITY(bp) (ASSERT(!BP_IS_EMBEDDED(bp)), &(bp)->blk_dva[0])
456 457 #define BP_IS_GANG(bp) \
457 458 (BP_IS_EMBEDDED(bp) ? B_FALSE : DVA_GET_GANG(BP_IDENTITY(bp)))
458 459 #define DVA_IS_EMPTY(dva) ((dva)->dva_word[0] == 0ULL && \
459 460 (dva)->dva_word[1] == 0ULL)
460 461 #define BP_IS_HOLE(bp) \
461 462 (!BP_IS_EMBEDDED(bp) && DVA_IS_EMPTY(BP_IDENTITY(bp)))
462 463
463 464 /* BP_IS_RAIDZ(bp) assumes no block compression */
464 465 #define BP_IS_RAIDZ(bp) (DVA_GET_ASIZE(&(bp)->blk_dva[0]) > \
465 466 BP_GET_PSIZE(bp))
466 467
467 468 #define BP_ZERO(bp) \
468 469 { \
469 470 (bp)->blk_dva[0].dva_word[0] = 0; \
470 471 (bp)->blk_dva[0].dva_word[1] = 0; \
471 472 (bp)->blk_dva[1].dva_word[0] = 0; \
472 473 (bp)->blk_dva[1].dva_word[1] = 0; \
473 474 (bp)->blk_dva[2].dva_word[0] = 0; \
474 475 (bp)->blk_dva[2].dva_word[1] = 0; \
475 476 (bp)->blk_prop = 0; \
476 477 (bp)->blk_pad[0] = 0; \
477 478 (bp)->blk_pad[1] = 0; \
478 479 (bp)->blk_phys_birth = 0; \
479 480 (bp)->blk_birth = 0; \
480 481 (bp)->blk_fill = 0; \
481 482 ZIO_SET_CHECKSUM(&(bp)->blk_cksum, 0, 0, 0, 0); \
482 483 }
483 484
484 485 #ifdef _BIG_ENDIAN
485 486 #define ZFS_HOST_BYTEORDER (0ULL)
486 487 #else
487 488 #define ZFS_HOST_BYTEORDER (1ULL)
488 489 #endif
489 490
490 491 #define BP_SHOULD_BYTESWAP(bp) (BP_GET_BYTEORDER(bp) != ZFS_HOST_BYTEORDER)
491 492
492 493 #define BP_SPRINTF_LEN 320
493 494
494 495 /*
495 496 * This macro allows code sharing between zfs, libzpool, and mdb.
496 497 * 'func' is either snprintf() or mdb_snprintf().
497 498 * 'ws' (whitespace) can be ' ' for single-line format, '\n' for multi-line.
498 499 */
499 500 #define SNPRINTF_BLKPTR(func, ws, buf, size, bp, type, checksum, compress) \
500 501 { \
501 502 static const char *copyname[] = \
502 503 { "zero", "single", "double", "triple" }; \
503 504 int len = 0; \
504 505 int copies = 0; \
505 506 \
506 507 if (bp == NULL) { \
507 508 len += func(buf + len, size - len, "<NULL>"); \
508 509 } else if (BP_IS_HOLE(bp)) { \
509 510 len += func(buf + len, size - len, "<hole>"); \
510 511 if (bp->blk_birth > 0) { \
511 512 len += func(buf + len, size - len, \
512 513 " birth=%lluL", \
513 514 (u_longlong_t)bp->blk_birth); \
514 515 } \
515 516 } else if (BP_IS_EMBEDDED(bp)) { \
516 517 len = func(buf + len, size - len, \
517 518 "EMBEDDED [L%llu %s] et=%u %s " \
518 519 "size=%llxL/%llxP birth=%lluL", \
519 520 (u_longlong_t)BP_GET_LEVEL(bp), \
520 521 type, \
521 522 (int)BPE_GET_ETYPE(bp), \
522 523 compress, \
523 524 (u_longlong_t)BPE_GET_LSIZE(bp), \
524 525 (u_longlong_t)BPE_GET_PSIZE(bp), \
525 526 (u_longlong_t)bp->blk_birth); \
526 527 } else { \
527 528 for (int d = 0; d < BP_GET_NDVAS(bp); d++) { \
528 529 const dva_t *dva = &bp->blk_dva[d]; \
529 530 if (DVA_IS_VALID(dva)) \
530 531 copies++; \
531 532 len += func(buf + len, size - len, \
532 533 "DVA[%d]=<%llu:%llx:%llx>%c", d, \
533 534 (u_longlong_t)DVA_GET_VDEV(dva), \
534 535 (u_longlong_t)DVA_GET_OFFSET(dva), \
535 536 (u_longlong_t)DVA_GET_ASIZE(dva), \
536 537 ws); \
537 538 } \
538 539 if (BP_IS_GANG(bp) && \
539 540 DVA_GET_ASIZE(&bp->blk_dva[2]) <= \
540 541 DVA_GET_ASIZE(&bp->blk_dva[1]) / 2) \
541 542 copies--; \
542 543 len += func(buf + len, size - len, \
543 544 "[L%llu %s] %s %s %s %s %s %s%c" \
544 545 "size=%llxL/%llxP birth=%lluL/%lluP fill=%llu%c" \
545 546 "cksum=%llx:%llx:%llx:%llx", \
546 547 (u_longlong_t)BP_GET_LEVEL(bp), \
547 548 type, \
548 549 checksum, \
549 550 compress, \
550 551 BP_GET_BYTEORDER(bp) == 0 ? "BE" : "LE", \
551 552 BP_IS_GANG(bp) ? "gang" : "contiguous", \
552 553 BP_GET_DEDUP(bp) ? "dedup" : "unique", \
553 554 copyname[copies], \
554 555 ws, \
555 556 (u_longlong_t)BP_GET_LSIZE(bp), \
556 557 (u_longlong_t)BP_GET_PSIZE(bp), \
557 558 (u_longlong_t)bp->blk_birth, \
558 559 (u_longlong_t)BP_PHYSICAL_BIRTH(bp), \
559 560 (u_longlong_t)BP_GET_FILL(bp), \
560 561 ws, \
561 562 (u_longlong_t)bp->blk_cksum.zc_word[0], \
562 563 (u_longlong_t)bp->blk_cksum.zc_word[1], \
563 564 (u_longlong_t)bp->blk_cksum.zc_word[2], \
564 565 (u_longlong_t)bp->blk_cksum.zc_word[3]); \
565 566 } \
566 567 ASSERT(len < size); \
567 568 }
568 569
569 570 #include <sys/dmu.h>
570 571
571 572 #define BP_GET_BUFC_TYPE(bp) \
572 573 (((BP_GET_LEVEL(bp) > 0) || (DMU_OT_IS_METADATA(BP_GET_TYPE(bp)))) ? \
573 574 ARC_BUFC_METADATA : ARC_BUFC_DATA)
574 575
575 576 typedef enum spa_import_type {
576 577 SPA_IMPORT_EXISTING,
577 578 SPA_IMPORT_ASSEMBLE
578 579 } spa_import_type_t;
579 580
580 581 /* state manipulation functions */
581 582 extern int spa_open(const char *pool, spa_t **, void *tag);
582 583 extern int spa_open_rewind(const char *pool, spa_t **, void *tag,
583 584 nvlist_t *policy, nvlist_t **config);
584 585 extern int spa_get_stats(const char *pool, nvlist_t **config, char *altroot,
585 586 size_t buflen);
586 587 extern int spa_create(const char *pool, nvlist_t *config, nvlist_t *props,
587 588 nvlist_t *zplprops);
588 589 extern int spa_import_rootpool(char *devpath, char *devid);
589 590 extern int spa_import(const char *pool, nvlist_t *config, nvlist_t *props,
590 591 uint64_t flags);
591 592 extern nvlist_t *spa_tryimport(nvlist_t *tryconfig);
592 593 extern int spa_destroy(char *pool);
593 594 extern int spa_export(char *pool, nvlist_t **oldconfig, boolean_t force,
594 595 boolean_t hardforce);
595 596 extern int spa_reset(char *pool);
596 597 extern void spa_async_request(spa_t *spa, int flag);
597 598 extern void spa_async_unrequest(spa_t *spa, int flag);
598 599 extern void spa_async_suspend(spa_t *spa);
599 600 extern void spa_async_resume(spa_t *spa);
600 601 extern spa_t *spa_inject_addref(char *pool);
601 602 extern void spa_inject_delref(spa_t *spa);
602 603 extern void spa_scan_stat_init(spa_t *spa);
603 604 extern int spa_scan_get_stats(spa_t *spa, pool_scan_stat_t *ps);
604 605
605 606 #define SPA_ASYNC_CONFIG_UPDATE 0x01
606 607 #define SPA_ASYNC_REMOVE 0x02
607 608 #define SPA_ASYNC_PROBE 0x04
608 609 #define SPA_ASYNC_RESILVER_DONE 0x08
609 610 #define SPA_ASYNC_RESILVER 0x10
610 611 #define SPA_ASYNC_AUTOEXPAND 0x20
611 612 #define SPA_ASYNC_REMOVE_DONE 0x40
612 613 #define SPA_ASYNC_REMOVE_STOP 0x80
613 614
614 615 /*
615 616 * Controls the behavior of spa_vdev_remove().
616 617 */
617 618 #define SPA_REMOVE_UNSPARE 0x01
618 619 #define SPA_REMOVE_DONE 0x02
619 620
620 621 /* device manipulation */
621 622 extern int spa_vdev_add(spa_t *spa, nvlist_t *nvroot);
622 623 extern int spa_vdev_attach(spa_t *spa, uint64_t guid, nvlist_t *nvroot,
623 624 int replacing);
624 625 extern int spa_vdev_detach(spa_t *spa, uint64_t guid, uint64_t pguid,
625 626 int replace_done);
626 627 extern int spa_vdev_remove(spa_t *spa, uint64_t guid, boolean_t unspare);
627 628 extern boolean_t spa_vdev_remove_active(spa_t *spa);
628 629 extern int spa_vdev_setpath(spa_t *spa, uint64_t guid, const char *newpath);
629 630 extern int spa_vdev_setfru(spa_t *spa, uint64_t guid, const char *newfru);
630 631 extern int spa_vdev_split_mirror(spa_t *spa, char *newname, nvlist_t *config,
631 632 nvlist_t *props, boolean_t exp);
632 633
633 634 /* spare state (which is global across all pools) */
634 635 extern void spa_spare_add(vdev_t *vd);
635 636 extern void spa_spare_remove(vdev_t *vd);
636 637 extern boolean_t spa_spare_exists(uint64_t guid, uint64_t *pool, int *refcnt);
637 638 extern void spa_spare_activate(vdev_t *vd);
638 639
639 640 /* L2ARC state (which is global across all pools) */
640 641 extern void spa_l2cache_add(vdev_t *vd);
641 642 extern void spa_l2cache_remove(vdev_t *vd);
642 643 extern boolean_t spa_l2cache_exists(uint64_t guid, uint64_t *pool);
643 644 extern void spa_l2cache_activate(vdev_t *vd);
644 645 extern void spa_l2cache_drop(spa_t *spa);
645 646
646 647 /* scanning */
647 648 extern int spa_scan(spa_t *spa, pool_scan_func_t func);
648 649 extern int spa_scan_stop(spa_t *spa);
649 650
650 651 /* spa syncing */
651 652 extern void spa_sync(spa_t *spa, uint64_t txg); /* only for DMU use */
652 653 extern void spa_sync_allpools(void);
653 654
654 655 /* spa namespace global mutex */
655 656 extern kmutex_t spa_namespace_lock;
656 657
657 658 /*
658 659 * SPA configuration functions in spa_config.c
659 660 */
660 661
661 662 #define SPA_CONFIG_UPDATE_POOL 0
662 663 #define SPA_CONFIG_UPDATE_VDEVS 1
663 664
664 665 extern void spa_config_sync(spa_t *, boolean_t, boolean_t);
665 666 extern void spa_config_load(void);
666 667 extern nvlist_t *spa_all_configs(uint64_t *);
667 668 extern void spa_config_set(spa_t *spa, nvlist_t *config);
668 669 extern nvlist_t *spa_config_generate(spa_t *spa, vdev_t *vd, uint64_t txg,
669 670 int getstats);
670 671 extern void spa_config_update(spa_t *spa, int what);
671 672
672 673 /*
673 674 * Miscellaneous SPA routines in spa_misc.c
674 675 */
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675 676
676 677 /* Namespace manipulation */
677 678 extern spa_t *spa_lookup(const char *name);
678 679 extern spa_t *spa_add(const char *name, nvlist_t *config, const char *altroot);
679 680 extern void spa_remove(spa_t *spa);
680 681 extern spa_t *spa_next(spa_t *prev);
681 682
682 683 /* Refcount functions */
683 684 extern void spa_open_ref(spa_t *spa, void *tag);
684 685 extern void spa_close(spa_t *spa, void *tag);
686 +extern void spa_async_close(spa_t *spa, void *tag);
685 687 extern boolean_t spa_refcount_zero(spa_t *spa);
686 688
687 689 #define SCL_NONE 0x00
688 690 #define SCL_CONFIG 0x01
689 691 #define SCL_STATE 0x02
690 692 #define SCL_L2ARC 0x04 /* hack until L2ARC 2.0 */
691 693 #define SCL_ALLOC 0x08
692 694 #define SCL_ZIO 0x10
693 695 #define SCL_FREE 0x20
694 696 #define SCL_VDEV 0x40
695 697 #define SCL_LOCKS 7
696 698 #define SCL_ALL ((1 << SCL_LOCKS) - 1)
697 699 #define SCL_STATE_ALL (SCL_STATE | SCL_L2ARC | SCL_ZIO)
698 700
699 701 /* Pool configuration locks */
700 702 extern int spa_config_tryenter(spa_t *spa, int locks, void *tag, krw_t rw);
701 703 extern void spa_config_enter(spa_t *spa, int locks, void *tag, krw_t rw);
702 704 extern void spa_config_exit(spa_t *spa, int locks, void *tag);
703 705 extern int spa_config_held(spa_t *spa, int locks, krw_t rw);
704 706
705 707 /* Pool vdev add/remove lock */
706 708 extern uint64_t spa_vdev_enter(spa_t *spa);
707 709 extern uint64_t spa_vdev_config_enter(spa_t *spa);
708 710 extern void spa_vdev_config_exit(spa_t *spa, vdev_t *vd, uint64_t txg,
709 711 int error, char *tag);
710 712 extern int spa_vdev_exit(spa_t *spa, vdev_t *vd, uint64_t txg, int error);
711 713
712 714 /* Pool vdev state change lock */
713 715 extern void spa_vdev_state_enter(spa_t *spa, int oplock);
714 716 extern int spa_vdev_state_exit(spa_t *spa, vdev_t *vd, int error);
715 717
716 718 /* Log state */
717 719 typedef enum spa_log_state {
718 720 SPA_LOG_UNKNOWN = 0, /* unknown log state */
719 721 SPA_LOG_MISSING, /* missing log(s) */
720 722 SPA_LOG_CLEAR, /* clear the log(s) */
721 723 SPA_LOG_GOOD, /* log(s) are good */
722 724 } spa_log_state_t;
723 725
724 726 extern spa_log_state_t spa_get_log_state(spa_t *spa);
725 727 extern void spa_set_log_state(spa_t *spa, spa_log_state_t state);
726 728 extern int spa_offline_log(spa_t *spa);
727 729
728 730 /* Log claim callback */
729 731 extern void spa_claim_notify(zio_t *zio);
730 732
731 733 /* Accessor functions */
732 734 extern boolean_t spa_shutting_down(spa_t *spa);
733 735 extern struct dsl_pool *spa_get_dsl(spa_t *spa);
734 736 extern boolean_t spa_is_initializing(spa_t *spa);
735 737 extern blkptr_t *spa_get_rootblkptr(spa_t *spa);
736 738 extern void spa_set_rootblkptr(spa_t *spa, const blkptr_t *bp);
737 739 extern void spa_altroot(spa_t *, char *, size_t);
738 740 extern int spa_sync_pass(spa_t *spa);
739 741 extern char *spa_name(spa_t *spa);
740 742 extern uint64_t spa_guid(spa_t *spa);
741 743 extern uint64_t spa_load_guid(spa_t *spa);
742 744 extern uint64_t spa_last_synced_txg(spa_t *spa);
743 745 extern uint64_t spa_first_txg(spa_t *spa);
744 746 extern uint64_t spa_syncing_txg(spa_t *spa);
745 747 extern uint64_t spa_version(spa_t *spa);
746 748 extern pool_state_t spa_state(spa_t *spa);
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747 749 extern spa_load_state_t spa_load_state(spa_t *spa);
748 750 extern uint64_t spa_freeze_txg(spa_t *spa);
749 751 extern uint64_t spa_get_asize(spa_t *spa, uint64_t lsize);
750 752 extern uint64_t spa_get_dspace(spa_t *spa);
751 753 extern uint64_t spa_get_slop_space(spa_t *spa);
752 754 extern void spa_update_dspace(spa_t *spa);
753 755 extern uint64_t spa_version(spa_t *spa);
754 756 extern boolean_t spa_deflate(spa_t *spa);
755 757 extern metaslab_class_t *spa_normal_class(spa_t *spa);
756 758 extern metaslab_class_t *spa_log_class(spa_t *spa);
759 +extern void spa_evicting_os_register(spa_t *, objset_t *os);
760 +extern void spa_evicting_os_deregister(spa_t *, objset_t *os);
761 +extern void spa_evicting_os_wait(spa_t *spa);
757 762 extern int spa_max_replication(spa_t *spa);
758 763 extern int spa_prev_software_version(spa_t *spa);
759 764 extern int spa_busy(void);
760 765 extern uint8_t spa_get_failmode(spa_t *spa);
761 766 extern boolean_t spa_suspended(spa_t *spa);
762 767 extern uint64_t spa_bootfs(spa_t *spa);
763 768 extern uint64_t spa_delegation(spa_t *spa);
764 769 extern objset_t *spa_meta_objset(spa_t *spa);
765 770 extern uint64_t spa_deadman_synctime(spa_t *spa);
766 771
767 772 /* Miscellaneous support routines */
768 773 extern void spa_activate_mos_feature(spa_t *spa, const char *feature,
769 774 dmu_tx_t *tx);
770 775 extern void spa_deactivate_mos_feature(spa_t *spa, const char *feature);
771 776 extern int spa_rename(const char *oldname, const char *newname);
772 777 extern spa_t *spa_by_guid(uint64_t pool_guid, uint64_t device_guid);
773 778 extern boolean_t spa_guid_exists(uint64_t pool_guid, uint64_t device_guid);
774 779 extern char *spa_strdup(const char *);
775 780 extern void spa_strfree(char *);
776 781 extern uint64_t spa_get_random(uint64_t range);
777 782 extern uint64_t spa_generate_guid(spa_t *spa);
778 783 extern void snprintf_blkptr(char *buf, size_t buflen, const blkptr_t *bp);
779 784 extern void spa_freeze(spa_t *spa);
780 785 extern int spa_change_guid(spa_t *spa);
781 786 extern void spa_upgrade(spa_t *spa, uint64_t version);
782 787 extern void spa_evict_all(void);
783 788 extern vdev_t *spa_lookup_by_guid(spa_t *spa, uint64_t guid,
784 789 boolean_t l2cache);
785 790 extern boolean_t spa_has_spare(spa_t *, uint64_t guid);
786 791 extern uint64_t dva_get_dsize_sync(spa_t *spa, const dva_t *dva);
787 792 extern uint64_t bp_get_dsize_sync(spa_t *spa, const blkptr_t *bp);
788 793 extern uint64_t bp_get_dsize(spa_t *spa, const blkptr_t *bp);
789 794 extern boolean_t spa_has_slogs(spa_t *spa);
790 795 extern boolean_t spa_is_root(spa_t *spa);
791 796 extern boolean_t spa_writeable(spa_t *spa);
792 797 extern boolean_t spa_has_pending_synctask(spa_t *spa);
793 798 extern int spa_maxblocksize(spa_t *spa);
794 799 extern void zfs_blkptr_verify(spa_t *spa, const blkptr_t *bp);
795 800
796 801 extern int spa_mode(spa_t *spa);
797 802 extern uint64_t strtonum(const char *str, char **nptr);
798 803
799 804 extern char *spa_his_ievent_table[];
800 805
801 806 extern void spa_history_create_obj(spa_t *spa, dmu_tx_t *tx);
802 807 extern int spa_history_get(spa_t *spa, uint64_t *offset, uint64_t *len_read,
803 808 char *his_buf);
804 809 extern int spa_history_log(spa_t *spa, const char *his_buf);
805 810 extern int spa_history_log_nvl(spa_t *spa, nvlist_t *nvl);
806 811 extern void spa_history_log_version(spa_t *spa, const char *operation);
807 812 extern void spa_history_log_internal(spa_t *spa, const char *operation,
808 813 dmu_tx_t *tx, const char *fmt, ...);
809 814 extern void spa_history_log_internal_ds(struct dsl_dataset *ds, const char *op,
810 815 dmu_tx_t *tx, const char *fmt, ...);
811 816 extern void spa_history_log_internal_dd(dsl_dir_t *dd, const char *operation,
812 817 dmu_tx_t *tx, const char *fmt, ...);
813 818
814 819 /* error handling */
815 820 struct zbookmark_phys;
816 821 extern void spa_log_error(spa_t *spa, zio_t *zio);
817 822 extern void zfs_ereport_post(const char *class, spa_t *spa, vdev_t *vd,
818 823 zio_t *zio, uint64_t stateoroffset, uint64_t length);
819 824 extern void zfs_post_remove(spa_t *spa, vdev_t *vd);
820 825 extern void zfs_post_state_change(spa_t *spa, vdev_t *vd);
821 826 extern void zfs_post_autoreplace(spa_t *spa, vdev_t *vd);
822 827 extern uint64_t spa_get_errlog_size(spa_t *spa);
823 828 extern int spa_get_errlog(spa_t *spa, void *uaddr, size_t *count);
824 829 extern void spa_errlog_rotate(spa_t *spa);
825 830 extern void spa_errlog_drain(spa_t *spa);
826 831 extern void spa_errlog_sync(spa_t *spa, uint64_t txg);
827 832 extern void spa_get_errlists(spa_t *spa, avl_tree_t *last, avl_tree_t *scrub);
828 833
829 834 /* vdev cache */
830 835 extern void vdev_cache_stat_init(void);
831 836 extern void vdev_cache_stat_fini(void);
832 837
833 838 /* Initialization and termination */
834 839 extern void spa_init(int flags);
835 840 extern void spa_fini(void);
836 841 extern void spa_boot_init();
837 842
838 843 /* properties */
839 844 extern int spa_prop_set(spa_t *spa, nvlist_t *nvp);
840 845 extern int spa_prop_get(spa_t *spa, nvlist_t **nvp);
841 846 extern void spa_prop_clear_bootfs(spa_t *spa, uint64_t obj, dmu_tx_t *tx);
842 847 extern void spa_configfile_set(spa_t *, nvlist_t *, boolean_t);
843 848
844 849 /* asynchronous event notification */
845 850 extern void spa_event_notify(spa_t *spa, vdev_t *vdev, const char *name);
846 851
847 852 #ifdef ZFS_DEBUG
848 853 #define dprintf_bp(bp, fmt, ...) do { \
849 854 if (zfs_flags & ZFS_DEBUG_DPRINTF) { \
850 855 char *__blkbuf = kmem_alloc(BP_SPRINTF_LEN, KM_SLEEP); \
851 856 snprintf_blkptr(__blkbuf, BP_SPRINTF_LEN, (bp)); \
852 857 dprintf(fmt " %s\n", __VA_ARGS__, __blkbuf); \
853 858 kmem_free(__blkbuf, BP_SPRINTF_LEN); \
854 859 } \
855 860 _NOTE(CONSTCOND) } while (0)
856 861 #else
857 862 #define dprintf_bp(bp, fmt, ...)
858 863 #endif
859 864
860 865 extern boolean_t spa_debug_enabled(spa_t *spa);
861 866 #define spa_dbgmsg(spa, ...) \
862 867 { \
863 868 if (spa_debug_enabled(spa)) \
864 869 zfs_dbgmsg(__VA_ARGS__); \
865 870 }
866 871
867 872 extern int spa_mode_global; /* mode, e.g. FREAD | FWRITE */
868 873
869 874 #ifdef __cplusplus
870 875 }
871 876 #endif
872 877
873 878 #endif /* _SYS_SPA_H */
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