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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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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) 2012 by Delphix. All rights reserved.
24 24 * Copyright 2011 Nexenta Systems, Inc. All rights reserved.
25 + * Copyright 2013 Saso Kiselkov. 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) \
69 70 ((x) ^= BF32_ENCODE((x >> low) ^ (val), low, len))
70 71 #define BF64_SET(x, low, len, val) \
71 72 ((x) ^= BF64_ENCODE((x >> low) ^ (val), low, len))
72 73
73 74 #define BF32_GET_SB(x, low, len, shift, bias) \
74 75 ((BF32_GET(x, low, len) + (bias)) << (shift))
75 76 #define BF64_GET_SB(x, low, len, shift, bias) \
76 77 ((BF64_GET(x, low, len) + (bias)) << (shift))
77 78
78 79 #define BF32_SET_SB(x, low, len, shift, bias, val) \
79 80 BF32_SET(x, low, len, ((val) >> (shift)) - (bias))
80 81 #define BF64_SET_SB(x, low, len, shift, bias, val) \
81 82 BF64_SET(x, low, len, ((val) >> (shift)) - (bias))
82 83
83 84 /*
84 85 * We currently support nine block sizes, from 512 bytes to 128K.
85 86 * We could go higher, but the benefits are near-zero and the cost
86 87 * of COWing a giant block to modify one byte would become excessive.
87 88 */
88 89 #define SPA_MINBLOCKSHIFT 9
89 90 #define SPA_MAXBLOCKSHIFT 17
90 91 #define SPA_MINBLOCKSIZE (1ULL << SPA_MINBLOCKSHIFT)
91 92 #define SPA_MAXBLOCKSIZE (1ULL << SPA_MAXBLOCKSHIFT)
92 93
93 94 #define SPA_BLOCKSIZES (SPA_MAXBLOCKSHIFT - SPA_MINBLOCKSHIFT + 1)
94 95
95 96 /*
96 97 * Size of block to hold the configuration data (a packed nvlist)
97 98 */
98 99 #define SPA_CONFIG_BLOCKSIZE (1ULL << 14)
99 100
100 101 /*
101 102 * The DVA size encodings for LSIZE and PSIZE support blocks up to 32MB.
102 103 * The ASIZE encoding should be at least 64 times larger (6 more bits)
103 104 * to support up to 4-way RAID-Z mirror mode with worst-case gang block
104 105 * overhead, three DVAs per bp, plus one more bit in case we do anything
105 106 * else that expands the ASIZE.
106 107 */
107 108 #define SPA_LSIZEBITS 16 /* LSIZE up to 32M (2^16 * 512) */
108 109 #define SPA_PSIZEBITS 16 /* PSIZE up to 32M (2^16 * 512) */
109 110 #define SPA_ASIZEBITS 24 /* ASIZE up to 64 times larger */
110 111
111 112 /*
112 113 * All SPA data is represented by 128-bit data virtual addresses (DVAs).
113 114 * The members of the dva_t should be considered opaque outside the SPA.
114 115 */
115 116 typedef struct dva {
116 117 uint64_t dva_word[2];
117 118 } dva_t;
118 119
119 120 /*
120 121 * Each block has a 256-bit checksum -- strong enough for cryptographic hashes.
121 122 */
122 123 typedef struct zio_cksum {
123 124 uint64_t zc_word[4];
124 125 } zio_cksum_t;
125 126
126 127 /*
127 128 * Each block is described by its DVAs, time of birth, checksum, etc.
128 129 * The word-by-word, bit-by-bit layout of the blkptr is as follows:
129 130 *
130 131 * 64 56 48 40 32 24 16 8 0
131 132 * +-------+-------+-------+-------+-------+-------+-------+-------+
132 133 * 0 | vdev1 | GRID | ASIZE |
133 134 * +-------+-------+-------+-------+-------+-------+-------+-------+
134 135 * 1 |G| offset1 |
135 136 * +-------+-------+-------+-------+-------+-------+-------+-------+
136 137 * 2 | vdev2 | GRID | ASIZE |
137 138 * +-------+-------+-------+-------+-------+-------+-------+-------+
138 139 * 3 |G| offset2 |
139 140 * +-------+-------+-------+-------+-------+-------+-------+-------+
140 141 * 4 | vdev3 | GRID | ASIZE |
141 142 * +-------+-------+-------+-------+-------+-------+-------+-------+
142 143 * 5 |G| offset3 |
143 144 * +-------+-------+-------+-------+-------+-------+-------+-------+
144 145 * 6 |BDX|lvl| type | cksum | comp | PSIZE | LSIZE |
145 146 * +-------+-------+-------+-------+-------+-------+-------+-------+
146 147 * 7 | padding |
147 148 * +-------+-------+-------+-------+-------+-------+-------+-------+
148 149 * 8 | padding |
149 150 * +-------+-------+-------+-------+-------+-------+-------+-------+
150 151 * 9 | physical birth txg |
151 152 * +-------+-------+-------+-------+-------+-------+-------+-------+
152 153 * a | logical birth txg |
153 154 * +-------+-------+-------+-------+-------+-------+-------+-------+
154 155 * b | fill count |
155 156 * +-------+-------+-------+-------+-------+-------+-------+-------+
156 157 * c | checksum[0] |
157 158 * +-------+-------+-------+-------+-------+-------+-------+-------+
158 159 * d | checksum[1] |
159 160 * +-------+-------+-------+-------+-------+-------+-------+-------+
160 161 * e | checksum[2] |
161 162 * +-------+-------+-------+-------+-------+-------+-------+-------+
162 163 * f | checksum[3] |
163 164 * +-------+-------+-------+-------+-------+-------+-------+-------+
164 165 *
165 166 * Legend:
166 167 *
167 168 * vdev virtual device ID
168 169 * offset offset into virtual device
169 170 * LSIZE logical size
170 171 * PSIZE physical size (after compression)
171 172 * ASIZE allocated size (including RAID-Z parity and gang block headers)
172 173 * GRID RAID-Z layout information (reserved for future use)
173 174 * cksum checksum function
174 175 * comp compression function
175 176 * G gang block indicator
176 177 * B byteorder (endianness)
177 178 * D dedup
178 179 * X unused
179 180 * lvl level of indirection
180 181 * type DMU object type
181 182 * phys birth txg of block allocation; zero if same as logical birth txg
182 183 * log. birth transaction group in which the block was logically born
183 184 * fill count number of non-zero blocks under this bp
184 185 * checksum[4] 256-bit checksum of the data this bp describes
185 186 */
186 187 #define SPA_BLKPTRSHIFT 7 /* blkptr_t is 128 bytes */
187 188 #define SPA_DVAS_PER_BP 3 /* Number of DVAs in a bp */
188 189
189 190 typedef struct blkptr {
190 191 dva_t blk_dva[SPA_DVAS_PER_BP]; /* Data Virtual Addresses */
191 192 uint64_t blk_prop; /* size, compression, type, etc */
192 193 uint64_t blk_pad[2]; /* Extra space for the future */
193 194 uint64_t blk_phys_birth; /* txg when block was allocated */
194 195 uint64_t blk_birth; /* transaction group at birth */
195 196 uint64_t blk_fill; /* fill count */
196 197 zio_cksum_t blk_cksum; /* 256-bit checksum */
197 198 } blkptr_t;
198 199
199 200 /*
200 201 * Macros to get and set fields in a bp or DVA.
201 202 */
202 203 #define DVA_GET_ASIZE(dva) \
203 204 BF64_GET_SB((dva)->dva_word[0], 0, 24, SPA_MINBLOCKSHIFT, 0)
204 205 #define DVA_SET_ASIZE(dva, x) \
205 206 BF64_SET_SB((dva)->dva_word[0], 0, 24, SPA_MINBLOCKSHIFT, 0, x)
206 207
207 208 #define DVA_GET_GRID(dva) BF64_GET((dva)->dva_word[0], 24, 8)
208 209 #define DVA_SET_GRID(dva, x) BF64_SET((dva)->dva_word[0], 24, 8, x)
209 210
210 211 #define DVA_GET_VDEV(dva) BF64_GET((dva)->dva_word[0], 32, 32)
211 212 #define DVA_SET_VDEV(dva, x) BF64_SET((dva)->dva_word[0], 32, 32, x)
212 213
213 214 #define DVA_GET_OFFSET(dva) \
214 215 BF64_GET_SB((dva)->dva_word[1], 0, 63, SPA_MINBLOCKSHIFT, 0)
215 216 #define DVA_SET_OFFSET(dva, x) \
216 217 BF64_SET_SB((dva)->dva_word[1], 0, 63, SPA_MINBLOCKSHIFT, 0, x)
217 218
218 219 #define DVA_GET_GANG(dva) BF64_GET((dva)->dva_word[1], 63, 1)
219 220 #define DVA_SET_GANG(dva, x) BF64_SET((dva)->dva_word[1], 63, 1, x)
220 221
221 222 #define BP_GET_LSIZE(bp) \
222 223 BF64_GET_SB((bp)->blk_prop, 0, 16, SPA_MINBLOCKSHIFT, 1)
223 224 #define BP_SET_LSIZE(bp, x) \
224 225 BF64_SET_SB((bp)->blk_prop, 0, 16, SPA_MINBLOCKSHIFT, 1, x)
225 226
226 227 #define BP_GET_PSIZE(bp) \
227 228 BF64_GET_SB((bp)->blk_prop, 16, 16, SPA_MINBLOCKSHIFT, 1)
228 229 #define BP_SET_PSIZE(bp, x) \
229 230 BF64_SET_SB((bp)->blk_prop, 16, 16, SPA_MINBLOCKSHIFT, 1, x)
230 231
231 232 #define BP_GET_COMPRESS(bp) BF64_GET((bp)->blk_prop, 32, 8)
232 233 #define BP_SET_COMPRESS(bp, x) BF64_SET((bp)->blk_prop, 32, 8, x)
233 234
234 235 #define BP_GET_CHECKSUM(bp) BF64_GET((bp)->blk_prop, 40, 8)
235 236 #define BP_SET_CHECKSUM(bp, x) BF64_SET((bp)->blk_prop, 40, 8, x)
236 237
237 238 #define BP_GET_TYPE(bp) BF64_GET((bp)->blk_prop, 48, 8)
238 239 #define BP_SET_TYPE(bp, x) BF64_SET((bp)->blk_prop, 48, 8, x)
239 240
240 241 #define BP_GET_LEVEL(bp) BF64_GET((bp)->blk_prop, 56, 5)
241 242 #define BP_SET_LEVEL(bp, x) BF64_SET((bp)->blk_prop, 56, 5, x)
242 243
243 244 #define BP_GET_PROP_BIT_61(bp) BF64_GET((bp)->blk_prop, 61, 1)
244 245 #define BP_SET_PROP_BIT_61(bp, x) BF64_SET((bp)->blk_prop, 61, 1, x)
245 246
246 247 #define BP_GET_DEDUP(bp) BF64_GET((bp)->blk_prop, 62, 1)
247 248 #define BP_SET_DEDUP(bp, x) BF64_SET((bp)->blk_prop, 62, 1, x)
248 249
249 250 #define BP_GET_BYTEORDER(bp) (0 - BF64_GET((bp)->blk_prop, 63, 1))
250 251 #define BP_SET_BYTEORDER(bp, x) BF64_SET((bp)->blk_prop, 63, 1, x)
251 252
252 253 #define BP_PHYSICAL_BIRTH(bp) \
253 254 ((bp)->blk_phys_birth ? (bp)->blk_phys_birth : (bp)->blk_birth)
254 255
255 256 #define BP_SET_BIRTH(bp, logical, physical) \
256 257 { \
257 258 (bp)->blk_birth = (logical); \
258 259 (bp)->blk_phys_birth = ((logical) == (physical) ? 0 : (physical)); \
259 260 }
260 261
261 262 #define BP_GET_ASIZE(bp) \
262 263 (DVA_GET_ASIZE(&(bp)->blk_dva[0]) + DVA_GET_ASIZE(&(bp)->blk_dva[1]) + \
263 264 DVA_GET_ASIZE(&(bp)->blk_dva[2]))
264 265
265 266 #define BP_GET_UCSIZE(bp) \
266 267 ((BP_GET_LEVEL(bp) > 0 || DMU_OT_IS_METADATA(BP_GET_TYPE(bp))) ? \
267 268 BP_GET_PSIZE(bp) : BP_GET_LSIZE(bp))
268 269
269 270 #define BP_GET_NDVAS(bp) \
270 271 (!!DVA_GET_ASIZE(&(bp)->blk_dva[0]) + \
271 272 !!DVA_GET_ASIZE(&(bp)->blk_dva[1]) + \
272 273 !!DVA_GET_ASIZE(&(bp)->blk_dva[2]))
273 274
274 275 #define BP_COUNT_GANG(bp) \
275 276 (DVA_GET_GANG(&(bp)->blk_dva[0]) + \
276 277 DVA_GET_GANG(&(bp)->blk_dva[1]) + \
277 278 DVA_GET_GANG(&(bp)->blk_dva[2]))
278 279
279 280 #define DVA_EQUAL(dva1, dva2) \
280 281 ((dva1)->dva_word[1] == (dva2)->dva_word[1] && \
281 282 (dva1)->dva_word[0] == (dva2)->dva_word[0])
282 283
283 284 #define BP_EQUAL(bp1, bp2) \
284 285 (BP_PHYSICAL_BIRTH(bp1) == BP_PHYSICAL_BIRTH(bp2) && \
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285 286 DVA_EQUAL(&(bp1)->blk_dva[0], &(bp2)->blk_dva[0]) && \
286 287 DVA_EQUAL(&(bp1)->blk_dva[1], &(bp2)->blk_dva[1]) && \
287 288 DVA_EQUAL(&(bp1)->blk_dva[2], &(bp2)->blk_dva[2]))
288 289
289 290 #define ZIO_CHECKSUM_EQUAL(zc1, zc2) \
290 291 (0 == (((zc1).zc_word[0] - (zc2).zc_word[0]) | \
291 292 ((zc1).zc_word[1] - (zc2).zc_word[1]) | \
292 293 ((zc1).zc_word[2] - (zc2).zc_word[2]) | \
293 294 ((zc1).zc_word[3] - (zc2).zc_word[3])))
294 295
296 +#define ZIO_CHECKSUM_BSWAP(_zc) \
297 + do { \
298 + zio_cksum_t *zc = (_zc); \
299 + zc->zc_word[0] = BSWAP_64(zc->zc_word[0]); \
300 + zc->zc_word[1] = BSWAP_64(zc->zc_word[1]); \
301 + zc->zc_word[2] = BSWAP_64(zc->zc_word[2]); \
302 + zc->zc_word[3] = BSWAP_64(zc->zc_word[3]); \
303 + _NOTE(NOTREACHED) \
304 + _NOTE(CONSTCOND) \
305 + } while (0)
306 +
295 307 #define DVA_IS_VALID(dva) (DVA_GET_ASIZE(dva) != 0)
296 308
297 309 #define ZIO_SET_CHECKSUM(zcp, w0, w1, w2, w3) \
298 310 { \
299 311 (zcp)->zc_word[0] = w0; \
300 312 (zcp)->zc_word[1] = w1; \
301 313 (zcp)->zc_word[2] = w2; \
302 314 (zcp)->zc_word[3] = w3; \
303 315 }
304 316
305 317 #define BP_IDENTITY(bp) (&(bp)->blk_dva[0])
306 318 #define BP_IS_GANG(bp) DVA_GET_GANG(BP_IDENTITY(bp))
307 319 #define BP_IS_HOLE(bp) ((bp)->blk_birth == 0)
308 320
309 321 /* BP_IS_RAIDZ(bp) assumes no block compression */
310 322 #define BP_IS_RAIDZ(bp) (DVA_GET_ASIZE(&(bp)->blk_dva[0]) > \
311 323 BP_GET_PSIZE(bp))
312 324
313 325 #define BP_ZERO(bp) \
314 326 { \
315 327 (bp)->blk_dva[0].dva_word[0] = 0; \
316 328 (bp)->blk_dva[0].dva_word[1] = 0; \
317 329 (bp)->blk_dva[1].dva_word[0] = 0; \
318 330 (bp)->blk_dva[1].dva_word[1] = 0; \
319 331 (bp)->blk_dva[2].dva_word[0] = 0; \
320 332 (bp)->blk_dva[2].dva_word[1] = 0; \
321 333 (bp)->blk_prop = 0; \
322 334 (bp)->blk_pad[0] = 0; \
323 335 (bp)->blk_pad[1] = 0; \
324 336 (bp)->blk_phys_birth = 0; \
325 337 (bp)->blk_birth = 0; \
326 338 (bp)->blk_fill = 0; \
327 339 ZIO_SET_CHECKSUM(&(bp)->blk_cksum, 0, 0, 0, 0); \
328 340 }
329 341
330 342 /*
331 343 * Note: the byteorder is either 0 or -1, both of which are palindromes.
332 344 * This simplifies the endianness handling a bit.
333 345 */
334 346 #ifdef _BIG_ENDIAN
335 347 #define ZFS_HOST_BYTEORDER (0ULL)
336 348 #else
337 349 #define ZFS_HOST_BYTEORDER (-1ULL)
338 350 #endif
339 351
340 352 #define BP_SHOULD_BYTESWAP(bp) (BP_GET_BYTEORDER(bp) != ZFS_HOST_BYTEORDER)
341 353
342 354 #define BP_SPRINTF_LEN 320
343 355
344 356 /*
345 357 * This macro allows code sharing between zfs, libzpool, and mdb.
346 358 * 'func' is either snprintf() or mdb_snprintf().
347 359 * 'ws' (whitespace) can be ' ' for single-line format, '\n' for multi-line.
348 360 */
349 361 #define SPRINTF_BLKPTR(func, ws, buf, bp, type, checksum, compress) \
350 362 { \
351 363 static const char *copyname[] = \
352 364 { "zero", "single", "double", "triple" }; \
353 365 int size = BP_SPRINTF_LEN; \
354 366 int len = 0; \
355 367 int copies = 0; \
356 368 \
357 369 if (bp == NULL) { \
358 370 len = func(buf + len, size - len, "<NULL>"); \
359 371 } else if (BP_IS_HOLE(bp)) { \
360 372 len = func(buf + len, size - len, "<hole>"); \
361 373 } else { \
362 374 for (int d = 0; d < BP_GET_NDVAS(bp); d++) { \
363 375 const dva_t *dva = &bp->blk_dva[d]; \
364 376 if (DVA_IS_VALID(dva)) \
365 377 copies++; \
366 378 len += func(buf + len, size - len, \
367 379 "DVA[%d]=<%llu:%llx:%llx>%c", d, \
368 380 (u_longlong_t)DVA_GET_VDEV(dva), \
369 381 (u_longlong_t)DVA_GET_OFFSET(dva), \
370 382 (u_longlong_t)DVA_GET_ASIZE(dva), \
371 383 ws); \
372 384 } \
373 385 if (BP_IS_GANG(bp) && \
374 386 DVA_GET_ASIZE(&bp->blk_dva[2]) <= \
375 387 DVA_GET_ASIZE(&bp->blk_dva[1]) / 2) \
376 388 copies--; \
377 389 len += func(buf + len, size - len, \
378 390 "[L%llu %s] %s %s %s %s %s %s%c" \
379 391 "size=%llxL/%llxP birth=%lluL/%lluP fill=%llu%c" \
380 392 "cksum=%llx:%llx:%llx:%llx", \
381 393 (u_longlong_t)BP_GET_LEVEL(bp), \
382 394 type, \
383 395 checksum, \
384 396 compress, \
385 397 BP_GET_BYTEORDER(bp) == 0 ? "BE" : "LE", \
386 398 BP_IS_GANG(bp) ? "gang" : "contiguous", \
387 399 BP_GET_DEDUP(bp) ? "dedup" : "unique", \
388 400 copyname[copies], \
389 401 ws, \
390 402 (u_longlong_t)BP_GET_LSIZE(bp), \
391 403 (u_longlong_t)BP_GET_PSIZE(bp), \
392 404 (u_longlong_t)bp->blk_birth, \
393 405 (u_longlong_t)BP_PHYSICAL_BIRTH(bp), \
394 406 (u_longlong_t)bp->blk_fill, \
395 407 ws, \
396 408 (u_longlong_t)bp->blk_cksum.zc_word[0], \
397 409 (u_longlong_t)bp->blk_cksum.zc_word[1], \
398 410 (u_longlong_t)bp->blk_cksum.zc_word[2], \
399 411 (u_longlong_t)bp->blk_cksum.zc_word[3]); \
400 412 } \
401 413 ASSERT(len < size); \
402 414 }
403 415
404 416 #include <sys/dmu.h>
405 417
406 418 #define BP_GET_BUFC_TYPE(bp) \
407 419 (((BP_GET_LEVEL(bp) > 0) || (DMU_OT_IS_METADATA(BP_GET_TYPE(bp)))) ? \
408 420 ARC_BUFC_METADATA : ARC_BUFC_DATA)
409 421
410 422 typedef enum spa_import_type {
411 423 SPA_IMPORT_EXISTING,
412 424 SPA_IMPORT_ASSEMBLE
413 425 } spa_import_type_t;
414 426
415 427 /* state manipulation functions */
416 428 extern int spa_open(const char *pool, spa_t **, void *tag);
417 429 extern int spa_open_rewind(const char *pool, spa_t **, void *tag,
418 430 nvlist_t *policy, nvlist_t **config);
419 431 extern int spa_get_stats(const char *pool, nvlist_t **config, char *altroot,
420 432 size_t buflen);
421 433 extern int spa_create(const char *pool, nvlist_t *config, nvlist_t *props,
422 434 nvlist_t *zplprops);
423 435 extern int spa_import_rootpool(char *devpath, char *devid);
424 436 extern int spa_import(const char *pool, nvlist_t *config, nvlist_t *props,
425 437 uint64_t flags);
426 438 extern nvlist_t *spa_tryimport(nvlist_t *tryconfig);
427 439 extern int spa_destroy(char *pool);
428 440 extern int spa_export(char *pool, nvlist_t **oldconfig, boolean_t force,
429 441 boolean_t hardforce);
430 442 extern int spa_reset(char *pool);
431 443 extern void spa_async_request(spa_t *spa, int flag);
432 444 extern void spa_async_unrequest(spa_t *spa, int flag);
433 445 extern void spa_async_suspend(spa_t *spa);
434 446 extern void spa_async_resume(spa_t *spa);
435 447 extern spa_t *spa_inject_addref(char *pool);
436 448 extern void spa_inject_delref(spa_t *spa);
437 449 extern void spa_scan_stat_init(spa_t *spa);
438 450 extern int spa_scan_get_stats(spa_t *spa, pool_scan_stat_t *ps);
439 451
440 452 #define SPA_ASYNC_CONFIG_UPDATE 0x01
441 453 #define SPA_ASYNC_REMOVE 0x02
442 454 #define SPA_ASYNC_PROBE 0x04
443 455 #define SPA_ASYNC_RESILVER_DONE 0x08
444 456 #define SPA_ASYNC_RESILVER 0x10
445 457 #define SPA_ASYNC_AUTOEXPAND 0x20
446 458 #define SPA_ASYNC_REMOVE_DONE 0x40
447 459 #define SPA_ASYNC_REMOVE_STOP 0x80
448 460
449 461 /*
450 462 * Controls the behavior of spa_vdev_remove().
451 463 */
452 464 #define SPA_REMOVE_UNSPARE 0x01
453 465 #define SPA_REMOVE_DONE 0x02
454 466
455 467 /* device manipulation */
456 468 extern int spa_vdev_add(spa_t *spa, nvlist_t *nvroot);
457 469 extern int spa_vdev_attach(spa_t *spa, uint64_t guid, nvlist_t *nvroot,
458 470 int replacing);
459 471 extern int spa_vdev_detach(spa_t *spa, uint64_t guid, uint64_t pguid,
460 472 int replace_done);
461 473 extern int spa_vdev_remove(spa_t *spa, uint64_t guid, boolean_t unspare);
462 474 extern boolean_t spa_vdev_remove_active(spa_t *spa);
463 475 extern int spa_vdev_setpath(spa_t *spa, uint64_t guid, const char *newpath);
464 476 extern int spa_vdev_setfru(spa_t *spa, uint64_t guid, const char *newfru);
465 477 extern int spa_vdev_split_mirror(spa_t *spa, char *newname, nvlist_t *config,
466 478 nvlist_t *props, boolean_t exp);
467 479
468 480 /* spare state (which is global across all pools) */
469 481 extern void spa_spare_add(vdev_t *vd);
470 482 extern void spa_spare_remove(vdev_t *vd);
471 483 extern boolean_t spa_spare_exists(uint64_t guid, uint64_t *pool, int *refcnt);
472 484 extern void spa_spare_activate(vdev_t *vd);
473 485
474 486 /* L2ARC state (which is global across all pools) */
475 487 extern void spa_l2cache_add(vdev_t *vd);
476 488 extern void spa_l2cache_remove(vdev_t *vd);
477 489 extern boolean_t spa_l2cache_exists(uint64_t guid, uint64_t *pool);
478 490 extern void spa_l2cache_activate(vdev_t *vd);
479 491 extern void spa_l2cache_drop(spa_t *spa);
480 492
481 493 /* scanning */
482 494 extern int spa_scan(spa_t *spa, pool_scan_func_t func);
483 495 extern int spa_scan_stop(spa_t *spa);
484 496
485 497 /* spa syncing */
486 498 extern void spa_sync(spa_t *spa, uint64_t txg); /* only for DMU use */
487 499 extern void spa_sync_allpools(void);
488 500
489 501 /* spa namespace global mutex */
490 502 extern kmutex_t spa_namespace_lock;
491 503
492 504 /*
493 505 * SPA configuration functions in spa_config.c
494 506 */
495 507
496 508 #define SPA_CONFIG_UPDATE_POOL 0
497 509 #define SPA_CONFIG_UPDATE_VDEVS 1
498 510
499 511 extern void spa_config_sync(spa_t *, boolean_t, boolean_t);
500 512 extern void spa_config_load(void);
501 513 extern nvlist_t *spa_all_configs(uint64_t *);
502 514 extern void spa_config_set(spa_t *spa, nvlist_t *config);
503 515 extern nvlist_t *spa_config_generate(spa_t *spa, vdev_t *vd, uint64_t txg,
504 516 int getstats);
505 517 extern void spa_config_update(spa_t *spa, int what);
506 518
507 519 /*
508 520 * Miscellaneous SPA routines in spa_misc.c
509 521 */
510 522
511 523 /* Namespace manipulation */
512 524 extern spa_t *spa_lookup(const char *name);
513 525 extern spa_t *spa_add(const char *name, nvlist_t *config, const char *altroot);
514 526 extern void spa_remove(spa_t *spa);
515 527 extern spa_t *spa_next(spa_t *prev);
516 528
517 529 /* Refcount functions */
518 530 extern void spa_open_ref(spa_t *spa, void *tag);
519 531 extern void spa_close(spa_t *spa, void *tag);
520 532 extern boolean_t spa_refcount_zero(spa_t *spa);
521 533
522 534 #define SCL_NONE 0x00
523 535 #define SCL_CONFIG 0x01
524 536 #define SCL_STATE 0x02
525 537 #define SCL_L2ARC 0x04 /* hack until L2ARC 2.0 */
526 538 #define SCL_ALLOC 0x08
527 539 #define SCL_ZIO 0x10
528 540 #define SCL_FREE 0x20
529 541 #define SCL_VDEV 0x40
530 542 #define SCL_LOCKS 7
531 543 #define SCL_ALL ((1 << SCL_LOCKS) - 1)
532 544 #define SCL_STATE_ALL (SCL_STATE | SCL_L2ARC | SCL_ZIO)
533 545
534 546 /* Pool configuration locks */
535 547 extern int spa_config_tryenter(spa_t *spa, int locks, void *tag, krw_t rw);
536 548 extern void spa_config_enter(spa_t *spa, int locks, void *tag, krw_t rw);
537 549 extern void spa_config_exit(spa_t *spa, int locks, void *tag);
538 550 extern int spa_config_held(spa_t *spa, int locks, krw_t rw);
539 551
540 552 /* Pool vdev add/remove lock */
541 553 extern uint64_t spa_vdev_enter(spa_t *spa);
542 554 extern uint64_t spa_vdev_config_enter(spa_t *spa);
543 555 extern void spa_vdev_config_exit(spa_t *spa, vdev_t *vd, uint64_t txg,
544 556 int error, char *tag);
545 557 extern int spa_vdev_exit(spa_t *spa, vdev_t *vd, uint64_t txg, int error);
546 558
547 559 /* Pool vdev state change lock */
548 560 extern void spa_vdev_state_enter(spa_t *spa, int oplock);
549 561 extern int spa_vdev_state_exit(spa_t *spa, vdev_t *vd, int error);
550 562
551 563 /* Log state */
552 564 typedef enum spa_log_state {
553 565 SPA_LOG_UNKNOWN = 0, /* unknown log state */
554 566 SPA_LOG_MISSING, /* missing log(s) */
555 567 SPA_LOG_CLEAR, /* clear the log(s) */
556 568 SPA_LOG_GOOD, /* log(s) are good */
557 569 } spa_log_state_t;
558 570
559 571 extern spa_log_state_t spa_get_log_state(spa_t *spa);
560 572 extern void spa_set_log_state(spa_t *spa, spa_log_state_t state);
561 573 extern int spa_offline_log(spa_t *spa);
562 574
563 575 /* Log claim callback */
564 576 extern void spa_claim_notify(zio_t *zio);
565 577
566 578 /* Accessor functions */
567 579 extern boolean_t spa_shutting_down(spa_t *spa);
568 580 extern struct dsl_pool *spa_get_dsl(spa_t *spa);
569 581 extern boolean_t spa_is_initializing(spa_t *spa);
570 582 extern blkptr_t *spa_get_rootblkptr(spa_t *spa);
571 583 extern void spa_set_rootblkptr(spa_t *spa, const blkptr_t *bp);
572 584 extern void spa_altroot(spa_t *, char *, size_t);
573 585 extern int spa_sync_pass(spa_t *spa);
574 586 extern char *spa_name(spa_t *spa);
575 587 extern uint64_t spa_guid(spa_t *spa);
576 588 extern uint64_t spa_load_guid(spa_t *spa);
577 589 extern uint64_t spa_last_synced_txg(spa_t *spa);
578 590 extern uint64_t spa_first_txg(spa_t *spa);
579 591 extern uint64_t spa_syncing_txg(spa_t *spa);
580 592 extern uint64_t spa_version(spa_t *spa);
581 593 extern pool_state_t spa_state(spa_t *spa);
582 594 extern spa_load_state_t spa_load_state(spa_t *spa);
583 595 extern uint64_t spa_freeze_txg(spa_t *spa);
584 596 extern uint64_t spa_get_asize(spa_t *spa, uint64_t lsize);
585 597 extern uint64_t spa_get_dspace(spa_t *spa);
586 598 extern void spa_update_dspace(spa_t *spa);
587 599 extern uint64_t spa_version(spa_t *spa);
588 600 extern boolean_t spa_deflate(spa_t *spa);
589 601 extern metaslab_class_t *spa_normal_class(spa_t *spa);
590 602 extern metaslab_class_t *spa_log_class(spa_t *spa);
591 603 extern int spa_max_replication(spa_t *spa);
592 604 extern int spa_prev_software_version(spa_t *spa);
593 605 extern int spa_busy(void);
594 606 extern uint8_t spa_get_failmode(spa_t *spa);
595 607 extern boolean_t spa_suspended(spa_t *spa);
596 608 extern uint64_t spa_bootfs(spa_t *spa);
597 609 extern uint64_t spa_delegation(spa_t *spa);
598 610 extern objset_t *spa_meta_objset(spa_t *spa);
599 611 extern uint64_t spa_deadman_synctime(spa_t *spa);
600 612
601 613 /* Miscellaneous support routines */
602 614 extern void spa_activate_mos_feature(spa_t *spa, const char *feature);
603 615 extern void spa_deactivate_mos_feature(spa_t *spa, const char *feature);
604 616 extern int spa_rename(const char *oldname, const char *newname);
605 617 extern spa_t *spa_by_guid(uint64_t pool_guid, uint64_t device_guid);
606 618 extern boolean_t spa_guid_exists(uint64_t pool_guid, uint64_t device_guid);
607 619 extern char *spa_strdup(const char *);
608 620 extern void spa_strfree(char *);
609 621 extern uint64_t spa_get_random(uint64_t range);
610 622 extern uint64_t spa_generate_guid(spa_t *spa);
611 623 extern void sprintf_blkptr(char *buf, const blkptr_t *bp);
612 624 extern void spa_freeze(spa_t *spa);
613 625 extern int spa_change_guid(spa_t *spa);
614 626 extern void spa_upgrade(spa_t *spa, uint64_t version);
615 627 extern void spa_evict_all(void);
616 628 extern vdev_t *spa_lookup_by_guid(spa_t *spa, uint64_t guid,
617 629 boolean_t l2cache);
618 630 extern boolean_t spa_has_spare(spa_t *, uint64_t guid);
619 631 extern uint64_t dva_get_dsize_sync(spa_t *spa, const dva_t *dva);
620 632 extern uint64_t bp_get_dsize_sync(spa_t *spa, const blkptr_t *bp);
621 633 extern uint64_t bp_get_dsize(spa_t *spa, const blkptr_t *bp);
622 634 extern boolean_t spa_has_slogs(spa_t *spa);
623 635 extern boolean_t spa_is_root(spa_t *spa);
624 636 extern boolean_t spa_writeable(spa_t *spa);
625 637
626 638 extern int spa_mode(spa_t *spa);
627 639 extern uint64_t strtonum(const char *str, char **nptr);
628 640
629 641 extern char *spa_his_ievent_table[];
630 642
631 643 extern void spa_history_create_obj(spa_t *spa, dmu_tx_t *tx);
632 644 extern int spa_history_get(spa_t *spa, uint64_t *offset, uint64_t *len_read,
633 645 char *his_buf);
634 646 extern int spa_history_log(spa_t *spa, const char *his_buf);
635 647 extern int spa_history_log_nvl(spa_t *spa, nvlist_t *nvl);
636 648 extern void spa_history_log_version(spa_t *spa, const char *operation);
637 649 extern void spa_history_log_internal(spa_t *spa, const char *operation,
638 650 dmu_tx_t *tx, const char *fmt, ...);
639 651 extern void spa_history_log_internal_ds(struct dsl_dataset *ds, const char *op,
640 652 dmu_tx_t *tx, const char *fmt, ...);
641 653 extern void spa_history_log_internal_dd(dsl_dir_t *dd, const char *operation,
642 654 dmu_tx_t *tx, const char *fmt, ...);
643 655
644 656 /* error handling */
645 657 struct zbookmark;
646 658 extern void spa_log_error(spa_t *spa, zio_t *zio);
647 659 extern void zfs_ereport_post(const char *class, spa_t *spa, vdev_t *vd,
648 660 zio_t *zio, uint64_t stateoroffset, uint64_t length);
649 661 extern void zfs_post_remove(spa_t *spa, vdev_t *vd);
650 662 extern void zfs_post_state_change(spa_t *spa, vdev_t *vd);
651 663 extern void zfs_post_autoreplace(spa_t *spa, vdev_t *vd);
652 664 extern uint64_t spa_get_errlog_size(spa_t *spa);
653 665 extern int spa_get_errlog(spa_t *spa, void *uaddr, size_t *count);
654 666 extern void spa_errlog_rotate(spa_t *spa);
655 667 extern void spa_errlog_drain(spa_t *spa);
656 668 extern void spa_errlog_sync(spa_t *spa, uint64_t txg);
657 669 extern void spa_get_errlists(spa_t *spa, avl_tree_t *last, avl_tree_t *scrub);
658 670
659 671 /* vdev cache */
660 672 extern void vdev_cache_stat_init(void);
661 673 extern void vdev_cache_stat_fini(void);
662 674
663 675 /* Initialization and termination */
664 676 extern void spa_init(int flags);
665 677 extern void spa_fini(void);
666 678 extern void spa_boot_init();
667 679
668 680 /* properties */
669 681 extern int spa_prop_set(spa_t *spa, nvlist_t *nvp);
670 682 extern int spa_prop_get(spa_t *spa, nvlist_t **nvp);
671 683 extern void spa_prop_clear_bootfs(spa_t *spa, uint64_t obj, dmu_tx_t *tx);
672 684 extern void spa_configfile_set(spa_t *, nvlist_t *, boolean_t);
673 685
674 686 /* asynchronous event notification */
675 687 extern void spa_event_notify(spa_t *spa, vdev_t *vdev, const char *name);
676 688
677 689 #ifdef ZFS_DEBUG
678 690 #define dprintf_bp(bp, fmt, ...) do { \
679 691 if (zfs_flags & ZFS_DEBUG_DPRINTF) { \
680 692 char *__blkbuf = kmem_alloc(BP_SPRINTF_LEN, KM_SLEEP); \
681 693 sprintf_blkptr(__blkbuf, (bp)); \
682 694 dprintf(fmt " %s\n", __VA_ARGS__, __blkbuf); \
683 695 kmem_free(__blkbuf, BP_SPRINTF_LEN); \
684 696 } \
685 697 _NOTE(CONSTCOND) } while (0)
686 698 #else
687 699 #define dprintf_bp(bp, fmt, ...)
688 700 #endif
689 701
690 702 extern boolean_t spa_debug_enabled(spa_t *spa);
691 703 #define spa_dbgmsg(spa, ...) \
692 704 { \
693 705 if (spa_debug_enabled(spa)) \
694 706 zfs_dbgmsg(__VA_ARGS__); \
695 707 }
696 708
697 709 extern int spa_mode_global; /* mode, e.g. FREAD | FWRITE */
698 710
699 711 #ifdef __cplusplus
700 712 }
701 713 #endif
702 714
703 715 #endif /* _SYS_SPA_H */
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