1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21 /*
22 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
23 * Copyright (c) 2012 by Delphix. All rights reserved.
24 * Copyright 2011 Nexenta Systems, Inc. All rights reserved.
25 * Copyright 2013 Saso Kiselkov. All rights reserved.
26 */
27
28 #ifndef _SYS_SPA_H
29 #define _SYS_SPA_H
30
31 #include <sys/avl.h>
32 #include <sys/zfs_context.h>
33 #include <sys/nvpair.h>
34 #include <sys/sysmacros.h>
35 #include <sys/types.h>
36 #include <sys/fs/zfs.h>
37
38 #ifdef __cplusplus
39 extern "C" {
40 #endif
41
42 /*
43 * Forward references that lots of things need.
44 */
45 typedef struct spa spa_t;
46 typedef struct vdev vdev_t;
47 typedef struct metaslab metaslab_t;
48 typedef struct metaslab_group metaslab_group_t;
49 typedef struct metaslab_class metaslab_class_t;
50 typedef struct zio zio_t;
51 typedef struct zilog zilog_t;
52 typedef struct spa_aux_vdev spa_aux_vdev_t;
53 typedef struct ddt ddt_t;
54 typedef struct ddt_entry ddt_entry_t;
55 struct dsl_pool;
56 struct dsl_dataset;
57 struct zfeature_info;
58
59 /*
60 * General-purpose 32-bit and 64-bit bitfield encodings.
61 */
62 #define BF32_DECODE(x, low, len) P2PHASE((x) >> (low), 1U << (len))
63 #define BF64_DECODE(x, low, len) P2PHASE((x) >> (low), 1ULL << (len))
64 #define BF32_ENCODE(x, low, len) (P2PHASE((x), 1U << (len)) << (low))
65 #define BF64_ENCODE(x, low, len) (P2PHASE((x), 1ULL << (len)) << (low))
66
67 #define BF32_GET(x, low, len) BF32_DECODE(x, low, len)
68 #define BF64_GET(x, low, len) BF64_DECODE(x, low, len)
69
70 #define BF32_SET(x, low, len, val) \
71 ((x) ^= BF32_ENCODE((x >> low) ^ (val), low, len))
72 #define BF64_SET(x, low, len, val) \
73 ((x) ^= BF64_ENCODE((x >> low) ^ (val), low, len))
74
75 #define BF32_GET_SB(x, low, len, shift, bias) \
76 ((BF32_GET(x, low, len) + (bias)) << (shift))
77 #define BF64_GET_SB(x, low, len, shift, bias) \
78 ((BF64_GET(x, low, len) + (bias)) << (shift))
79
80 #define BF32_SET_SB(x, low, len, shift, bias, val) \
81 BF32_SET(x, low, len, ((val) >> (shift)) - (bias))
82 #define BF64_SET_SB(x, low, len, shift, bias, val) \
83 BF64_SET(x, low, len, ((val) >> (shift)) - (bias))
84
85 /*
86 * We currently support nine block sizes, from 512 bytes to 128K.
87 * We could go higher, but the benefits are near-zero and the cost
88 * of COWing a giant block to modify one byte would become excessive.
89 */
90 #define SPA_MINBLOCKSHIFT 9
91 #define SPA_MAXBLOCKSHIFT 17
92 #define SPA_MINBLOCKSIZE (1ULL << SPA_MINBLOCKSHIFT)
93 #define SPA_MAXBLOCKSIZE (1ULL << SPA_MAXBLOCKSHIFT)
94
95 #define SPA_BLOCKSIZES (SPA_MAXBLOCKSHIFT - SPA_MINBLOCKSHIFT + 1)
96
97 /*
98 * Size of block to hold the configuration data (a packed nvlist)
99 */
100 #define SPA_CONFIG_BLOCKSIZE (1ULL << 14)
101
102 /*
103 * The DVA size encodings for LSIZE and PSIZE support blocks up to 32MB.
104 * The ASIZE encoding should be at least 64 times larger (6 more bits)
105 * to support up to 4-way RAID-Z mirror mode with worst-case gang block
106 * overhead, three DVAs per bp, plus one more bit in case we do anything
107 * else that expands the ASIZE.
108 */
109 #define SPA_LSIZEBITS 16 /* LSIZE up to 32M (2^16 * 512) */
110 #define SPA_PSIZEBITS 16 /* PSIZE up to 32M (2^16 * 512) */
111 #define SPA_ASIZEBITS 24 /* ASIZE up to 64 times larger */
112
113 /*
114 * All SPA data is represented by 128-bit data virtual addresses (DVAs).
115 * The members of the dva_t should be considered opaque outside the SPA.
116 */
117 typedef struct dva {
118 uint64_t dva_word[2];
119 } dva_t;
120
121 /*
122 * Each block has a 256-bit checksum -- strong enough for cryptographic hashes.
123 */
124 typedef struct zio_cksum {
125 uint64_t zc_word[4];
126 } zio_cksum_t;
127
128 /*
129 * Some checksums/hashes need a 256-bit initialization salt. This salt is kept
130 * secret and is suitable for use in MAC algorithms as the key.
131 */
132 typedef struct zio_cksum_salt {
133 uint8_t zcs_bytes[32];
134 } zio_cksum_salt_t;
135
136 /*
137 * Each block is described by its DVAs, time of birth, checksum, etc.
138 * The word-by-word, bit-by-bit layout of the blkptr is as follows:
139 *
140 * 64 56 48 40 32 24 16 8 0
141 * +-------+-------+-------+-------+-------+-------+-------+-------+
142 * 0 | vdev1 | GRID | ASIZE |
143 * +-------+-------+-------+-------+-------+-------+-------+-------+
144 * 1 |G| offset1 |
145 * +-------+-------+-------+-------+-------+-------+-------+-------+
146 * 2 | vdev2 | GRID | ASIZE |
147 * +-------+-------+-------+-------+-------+-------+-------+-------+
148 * 3 |G| offset2 |
149 * +-------+-------+-------+-------+-------+-------+-------+-------+
150 * 4 | vdev3 | GRID | ASIZE |
151 * +-------+-------+-------+-------+-------+-------+-------+-------+
152 * 5 |G| offset3 |
153 * +-------+-------+-------+-------+-------+-------+-------+-------+
154 * 6 |BDX|lvl| type | cksum | comp | PSIZE | LSIZE |
155 * +-------+-------+-------+-------+-------+-------+-------+-------+
156 * 7 | padding |
157 * +-------+-------+-------+-------+-------+-------+-------+-------+
158 * 8 | padding |
159 * +-------+-------+-------+-------+-------+-------+-------+-------+
160 * 9 | physical birth txg |
161 * +-------+-------+-------+-------+-------+-------+-------+-------+
162 * a | logical birth txg |
163 * +-------+-------+-------+-------+-------+-------+-------+-------+
164 * b | fill count |
165 * +-------+-------+-------+-------+-------+-------+-------+-------+
166 * c | checksum[0] |
167 * +-------+-------+-------+-------+-------+-------+-------+-------+
168 * d | checksum[1] |
169 * +-------+-------+-------+-------+-------+-------+-------+-------+
170 * e | checksum[2] |
171 * +-------+-------+-------+-------+-------+-------+-------+-------+
172 * f | checksum[3] |
173 * +-------+-------+-------+-------+-------+-------+-------+-------+
174 *
175 * Legend:
176 *
177 * vdev virtual device ID
178 * offset offset into virtual device
179 * LSIZE logical size
180 * PSIZE physical size (after compression)
181 * ASIZE allocated size (including RAID-Z parity and gang block headers)
182 * GRID RAID-Z layout information (reserved for future use)
183 * cksum checksum function
184 * comp compression function
185 * G gang block indicator
186 * B byteorder (endianness)
187 * D dedup
188 * X unused
189 * lvl level of indirection
190 * type DMU object type
191 * phys birth txg of block allocation; zero if same as logical birth txg
192 * log. birth transaction group in which the block was logically born
193 * fill count number of non-zero blocks under this bp
194 * checksum[4] 256-bit checksum of the data this bp describes
195 */
196 #define SPA_BLKPTRSHIFT 7 /* blkptr_t is 128 bytes */
197 #define SPA_DVAS_PER_BP 3 /* Number of DVAs in a bp */
198
199 typedef struct blkptr {
200 dva_t blk_dva[SPA_DVAS_PER_BP]; /* Data Virtual Addresses */
201 uint64_t blk_prop; /* size, compression, type, etc */
202 uint64_t blk_pad[2]; /* Extra space for the future */
203 uint64_t blk_phys_birth; /* txg when block was allocated */
204 uint64_t blk_birth; /* transaction group at birth */
205 uint64_t blk_fill; /* fill count */
206 zio_cksum_t blk_cksum; /* 256-bit checksum */
207 } blkptr_t;
208
209 /*
210 * Macros to get and set fields in a bp or DVA.
211 */
212 #define DVA_GET_ASIZE(dva) \
213 BF64_GET_SB((dva)->dva_word[0], 0, 24, SPA_MINBLOCKSHIFT, 0)
214 #define DVA_SET_ASIZE(dva, x) \
215 BF64_SET_SB((dva)->dva_word[0], 0, 24, SPA_MINBLOCKSHIFT, 0, x)
216
217 #define DVA_GET_GRID(dva) BF64_GET((dva)->dva_word[0], 24, 8)
218 #define DVA_SET_GRID(dva, x) BF64_SET((dva)->dva_word[0], 24, 8, x)
219
220 #define DVA_GET_VDEV(dva) BF64_GET((dva)->dva_word[0], 32, 32)
221 #define DVA_SET_VDEV(dva, x) BF64_SET((dva)->dva_word[0], 32, 32, x)
222
223 #define DVA_GET_OFFSET(dva) \
224 BF64_GET_SB((dva)->dva_word[1], 0, 63, SPA_MINBLOCKSHIFT, 0)
225 #define DVA_SET_OFFSET(dva, x) \
226 BF64_SET_SB((dva)->dva_word[1], 0, 63, SPA_MINBLOCKSHIFT, 0, x)
227
228 #define DVA_GET_GANG(dva) BF64_GET((dva)->dva_word[1], 63, 1)
229 #define DVA_SET_GANG(dva, x) BF64_SET((dva)->dva_word[1], 63, 1, x)
230
231 #define BP_GET_LSIZE(bp) \
232 BF64_GET_SB((bp)->blk_prop, 0, 16, SPA_MINBLOCKSHIFT, 1)
233 #define BP_SET_LSIZE(bp, x) \
234 BF64_SET_SB((bp)->blk_prop, 0, 16, SPA_MINBLOCKSHIFT, 1, x)
235
236 #define BP_GET_PSIZE(bp) \
237 BF64_GET_SB((bp)->blk_prop, 16, 16, SPA_MINBLOCKSHIFT, 1)
238 #define BP_SET_PSIZE(bp, x) \
239 BF64_SET_SB((bp)->blk_prop, 16, 16, SPA_MINBLOCKSHIFT, 1, x)
240
241 #define BP_GET_COMPRESS(bp) BF64_GET((bp)->blk_prop, 32, 8)
242 #define BP_SET_COMPRESS(bp, x) BF64_SET((bp)->blk_prop, 32, 8, x)
243
244 #define BP_GET_CHECKSUM(bp) BF64_GET((bp)->blk_prop, 40, 8)
245 #define BP_SET_CHECKSUM(bp, x) BF64_SET((bp)->blk_prop, 40, 8, x)
246
247 #define BP_GET_TYPE(bp) BF64_GET((bp)->blk_prop, 48, 8)
248 #define BP_SET_TYPE(bp, x) BF64_SET((bp)->blk_prop, 48, 8, x)
249
250 #define BP_GET_LEVEL(bp) BF64_GET((bp)->blk_prop, 56, 5)
251 #define BP_SET_LEVEL(bp, x) BF64_SET((bp)->blk_prop, 56, 5, x)
252
253 #define BP_GET_PROP_BIT_61(bp) BF64_GET((bp)->blk_prop, 61, 1)
254 #define BP_SET_PROP_BIT_61(bp, x) BF64_SET((bp)->blk_prop, 61, 1, x)
255
256 #define BP_GET_DEDUP(bp) BF64_GET((bp)->blk_prop, 62, 1)
257 #define BP_SET_DEDUP(bp, x) BF64_SET((bp)->blk_prop, 62, 1, x)
258
259 #define BP_GET_BYTEORDER(bp) (0 - BF64_GET((bp)->blk_prop, 63, 1))
260 #define BP_SET_BYTEORDER(bp, x) BF64_SET((bp)->blk_prop, 63, 1, x)
261
262 #define BP_PHYSICAL_BIRTH(bp) \
263 ((bp)->blk_phys_birth ? (bp)->blk_phys_birth : (bp)->blk_birth)
264
265 #define BP_SET_BIRTH(bp, logical, physical) \
266 { \
267 (bp)->blk_birth = (logical); \
268 (bp)->blk_phys_birth = ((logical) == (physical) ? 0 : (physical)); \
269 }
270
271 #define BP_GET_ASIZE(bp) \
272 (DVA_GET_ASIZE(&(bp)->blk_dva[0]) + DVA_GET_ASIZE(&(bp)->blk_dva[1]) + \
273 DVA_GET_ASIZE(&(bp)->blk_dva[2]))
274
275 #define BP_GET_UCSIZE(bp) \
276 ((BP_GET_LEVEL(bp) > 0 || DMU_OT_IS_METADATA(BP_GET_TYPE(bp))) ? \
277 BP_GET_PSIZE(bp) : BP_GET_LSIZE(bp))
278
279 #define BP_GET_NDVAS(bp) \
280 (!!DVA_GET_ASIZE(&(bp)->blk_dva[0]) + \
281 !!DVA_GET_ASIZE(&(bp)->blk_dva[1]) + \
282 !!DVA_GET_ASIZE(&(bp)->blk_dva[2]))
283
284 #define BP_COUNT_GANG(bp) \
285 (DVA_GET_GANG(&(bp)->blk_dva[0]) + \
286 DVA_GET_GANG(&(bp)->blk_dva[1]) + \
287 DVA_GET_GANG(&(bp)->blk_dva[2]))
288
289 #define DVA_EQUAL(dva1, dva2) \
290 ((dva1)->dva_word[1] == (dva2)->dva_word[1] && \
291 (dva1)->dva_word[0] == (dva2)->dva_word[0])
292
293 #define BP_EQUAL(bp1, bp2) \
294 (BP_PHYSICAL_BIRTH(bp1) == BP_PHYSICAL_BIRTH(bp2) && \
295 DVA_EQUAL(&(bp1)->blk_dva[0], &(bp2)->blk_dva[0]) && \
296 DVA_EQUAL(&(bp1)->blk_dva[1], &(bp2)->blk_dva[1]) && \
297 DVA_EQUAL(&(bp1)->blk_dva[2], &(bp2)->blk_dva[2]))
298
299 #define ZIO_CHECKSUM_EQUAL(zc1, zc2) \
300 (0 == (((zc1).zc_word[0] - (zc2).zc_word[0]) | \
301 ((zc1).zc_word[1] - (zc2).zc_word[1]) | \
302 ((zc1).zc_word[2] - (zc2).zc_word[2]) | \
303 ((zc1).zc_word[3] - (zc2).zc_word[3])))
304
305 #define DVA_IS_VALID(dva) (DVA_GET_ASIZE(dva) != 0)
306
307 #define ZIO_SET_CHECKSUM(zcp, w0, w1, w2, w3) \
308 { \
309 (zcp)->zc_word[0] = w0; \
310 (zcp)->zc_word[1] = w1; \
311 (zcp)->zc_word[2] = w2; \
312 (zcp)->zc_word[3] = w3; \
313 }
314
315 #define BP_IDENTITY(bp) (&(bp)->blk_dva[0])
316 #define BP_IS_GANG(bp) DVA_GET_GANG(BP_IDENTITY(bp))
317 #define BP_IS_HOLE(bp) ((bp)->blk_birth == 0)
318
319 /* BP_IS_RAIDZ(bp) assumes no block compression */
320 #define BP_IS_RAIDZ(bp) (DVA_GET_ASIZE(&(bp)->blk_dva[0]) > \
321 BP_GET_PSIZE(bp))
322
323 #define BP_ZERO(bp) \
324 { \
325 (bp)->blk_dva[0].dva_word[0] = 0; \
326 (bp)->blk_dva[0].dva_word[1] = 0; \
327 (bp)->blk_dva[1].dva_word[0] = 0; \
328 (bp)->blk_dva[1].dva_word[1] = 0; \
329 (bp)->blk_dva[2].dva_word[0] = 0; \
330 (bp)->blk_dva[2].dva_word[1] = 0; \
331 (bp)->blk_prop = 0; \
332 (bp)->blk_pad[0] = 0; \
333 (bp)->blk_pad[1] = 0; \
334 (bp)->blk_phys_birth = 0; \
335 (bp)->blk_birth = 0; \
336 (bp)->blk_fill = 0; \
337 ZIO_SET_CHECKSUM(&(bp)->blk_cksum, 0, 0, 0, 0); \
338 }
339
340 /*
341 * Note: the byteorder is either 0 or -1, both of which are palindromes.
342 * This simplifies the endianness handling a bit.
343 */
344 #ifdef _BIG_ENDIAN
345 #define ZFS_HOST_BYTEORDER (0ULL)
346 #else
347 #define ZFS_HOST_BYTEORDER (-1ULL)
348 #endif
349
350 #define BP_SHOULD_BYTESWAP(bp) (BP_GET_BYTEORDER(bp) != ZFS_HOST_BYTEORDER)
351
352 #define BP_SPRINTF_LEN 320
353
354 /*
355 * This macro allows code sharing between zfs, libzpool, and mdb.
356 * 'func' is either snprintf() or mdb_snprintf().
357 * 'ws' (whitespace) can be ' ' for single-line format, '\n' for multi-line.
358 */
359 #define SPRINTF_BLKPTR(func, ws, buf, bp, type, checksum, compress) \
360 { \
361 static const char *copyname[] = \
362 { "zero", "single", "double", "triple" }; \
363 int size = BP_SPRINTF_LEN; \
364 int len = 0; \
365 int copies = 0; \
366 \
367 if (bp == NULL) { \
368 len = func(buf + len, size - len, "<NULL>"); \
369 } else if (BP_IS_HOLE(bp)) { \
370 len = func(buf + len, size - len, "<hole>"); \
371 } else { \
372 for (int d = 0; d < BP_GET_NDVAS(bp); d++) { \
373 const dva_t *dva = &bp->blk_dva[d]; \
374 if (DVA_IS_VALID(dva)) \
375 copies++; \
376 len += func(buf + len, size - len, \
377 "DVA[%d]=<%llu:%llx:%llx>%c", d, \
378 (u_longlong_t)DVA_GET_VDEV(dva), \
379 (u_longlong_t)DVA_GET_OFFSET(dva), \
380 (u_longlong_t)DVA_GET_ASIZE(dva), \
381 ws); \
382 } \
383 if (BP_IS_GANG(bp) && \
384 DVA_GET_ASIZE(&bp->blk_dva[2]) <= \
385 DVA_GET_ASIZE(&bp->blk_dva[1]) / 2) \
386 copies--; \
387 len += func(buf + len, size - len, \
388 "[L%llu %s] %s %s %s %s %s %s%c" \
389 "size=%llxL/%llxP birth=%lluL/%lluP fill=%llu%c" \
390 "cksum=%llx:%llx:%llx:%llx", \
391 (u_longlong_t)BP_GET_LEVEL(bp), \
392 type, \
393 checksum, \
394 compress, \
395 BP_GET_BYTEORDER(bp) == 0 ? "BE" : "LE", \
396 BP_IS_GANG(bp) ? "gang" : "contiguous", \
397 BP_GET_DEDUP(bp) ? "dedup" : "unique", \
398 copyname[copies], \
399 ws, \
400 (u_longlong_t)BP_GET_LSIZE(bp), \
401 (u_longlong_t)BP_GET_PSIZE(bp), \
402 (u_longlong_t)bp->blk_birth, \
403 (u_longlong_t)BP_PHYSICAL_BIRTH(bp), \
404 (u_longlong_t)bp->blk_fill, \
405 ws, \
406 (u_longlong_t)bp->blk_cksum.zc_word[0], \
407 (u_longlong_t)bp->blk_cksum.zc_word[1], \
408 (u_longlong_t)bp->blk_cksum.zc_word[2], \
409 (u_longlong_t)bp->blk_cksum.zc_word[3]); \
410 } \
411 ASSERT(len < size); \
412 }
413
414 #include <sys/dmu.h>
415
416 #define BP_GET_BUFC_TYPE(bp) \
417 (((BP_GET_LEVEL(bp) > 0) || (DMU_OT_IS_METADATA(BP_GET_TYPE(bp)))) ? \
418 ARC_BUFC_METADATA : ARC_BUFC_DATA)
419
420 typedef enum spa_import_type {
421 SPA_IMPORT_EXISTING,
422 SPA_IMPORT_ASSEMBLE
423 } spa_import_type_t;
424
425 /* state manipulation functions */
426 extern int spa_open(const char *pool, spa_t **, void *tag);
427 extern int spa_open_rewind(const char *pool, spa_t **, void *tag,
428 nvlist_t *policy, nvlist_t **config);
429 extern int spa_get_stats(const char *pool, nvlist_t **config, char *altroot,
430 size_t buflen);
431 extern int spa_create(const char *pool, nvlist_t *config, nvlist_t *props,
432 nvlist_t *zplprops);
433 extern int spa_import_rootpool(char *devpath, char *devid);
434 extern int spa_import(const char *pool, nvlist_t *config, nvlist_t *props,
435 uint64_t flags);
436 extern nvlist_t *spa_tryimport(nvlist_t *tryconfig);
437 extern int spa_destroy(char *pool);
438 extern int spa_export(char *pool, nvlist_t **oldconfig, boolean_t force,
439 boolean_t hardforce);
440 extern int spa_reset(char *pool);
441 extern void spa_async_request(spa_t *spa, int flag);
442 extern void spa_async_unrequest(spa_t *spa, int flag);
443 extern void spa_async_suspend(spa_t *spa);
444 extern void spa_async_resume(spa_t *spa);
445 extern spa_t *spa_inject_addref(char *pool);
446 extern void spa_inject_delref(spa_t *spa);
447 extern void spa_scan_stat_init(spa_t *spa);
448 extern int spa_scan_get_stats(spa_t *spa, pool_scan_stat_t *ps);
449
450 #define SPA_ASYNC_CONFIG_UPDATE 0x01
451 #define SPA_ASYNC_REMOVE 0x02
452 #define SPA_ASYNC_PROBE 0x04
453 #define SPA_ASYNC_RESILVER_DONE 0x08
454 #define SPA_ASYNC_RESILVER 0x10
455 #define SPA_ASYNC_AUTOEXPAND 0x20
456 #define SPA_ASYNC_REMOVE_DONE 0x40
457 #define SPA_ASYNC_REMOVE_STOP 0x80
458
459 /*
460 * Controls the behavior of spa_vdev_remove().
461 */
462 #define SPA_REMOVE_UNSPARE 0x01
463 #define SPA_REMOVE_DONE 0x02
464
465 /* device manipulation */
466 extern int spa_vdev_add(spa_t *spa, nvlist_t *nvroot);
467 extern int spa_vdev_attach(spa_t *spa, uint64_t guid, nvlist_t *nvroot,
468 int replacing);
469 extern int spa_vdev_detach(spa_t *spa, uint64_t guid, uint64_t pguid,
470 int replace_done);
471 extern int spa_vdev_remove(spa_t *spa, uint64_t guid, boolean_t unspare);
472 extern boolean_t spa_vdev_remove_active(spa_t *spa);
473 extern int spa_vdev_setpath(spa_t *spa, uint64_t guid, const char *newpath);
474 extern int spa_vdev_setfru(spa_t *spa, uint64_t guid, const char *newfru);
475 extern int spa_vdev_split_mirror(spa_t *spa, char *newname, nvlist_t *config,
476 nvlist_t *props, boolean_t exp);
477
478 /* spare state (which is global across all pools) */
479 extern void spa_spare_add(vdev_t *vd);
480 extern void spa_spare_remove(vdev_t *vd);
481 extern boolean_t spa_spare_exists(uint64_t guid, uint64_t *pool, int *refcnt);
482 extern void spa_spare_activate(vdev_t *vd);
483
484 /* L2ARC state (which is global across all pools) */
485 extern void spa_l2cache_add(vdev_t *vd);
486 extern void spa_l2cache_remove(vdev_t *vd);
487 extern boolean_t spa_l2cache_exists(uint64_t guid, uint64_t *pool);
488 extern void spa_l2cache_activate(vdev_t *vd);
489 extern void spa_l2cache_drop(spa_t *spa);
490
491 /* scanning */
492 extern int spa_scan(spa_t *spa, pool_scan_func_t func);
493 extern int spa_scan_stop(spa_t *spa);
494
495 /* spa syncing */
496 extern void spa_sync(spa_t *spa, uint64_t txg); /* only for DMU use */
497 extern void spa_sync_allpools(void);
498
499 /* spa namespace global mutex */
500 extern kmutex_t spa_namespace_lock;
501
502 /*
503 * SPA configuration functions in spa_config.c
504 */
505
506 #define SPA_CONFIG_UPDATE_POOL 0
507 #define SPA_CONFIG_UPDATE_VDEVS 1
508
509 extern void spa_config_sync(spa_t *, boolean_t, boolean_t);
510 extern void spa_config_load(void);
511 extern nvlist_t *spa_all_configs(uint64_t *);
512 extern void spa_config_set(spa_t *spa, nvlist_t *config);
513 extern nvlist_t *spa_config_generate(spa_t *spa, vdev_t *vd, uint64_t txg,
514 int getstats);
515 extern void spa_config_update(spa_t *spa, int what);
516
517 /*
518 * Miscellaneous SPA routines in spa_misc.c
519 */
520
521 /* Namespace manipulation */
522 extern spa_t *spa_lookup(const char *name);
523 extern spa_t *spa_add(const char *name, nvlist_t *config, const char *altroot);
524 extern void spa_remove(spa_t *spa);
525 extern spa_t *spa_next(spa_t *prev);
526
527 /* Refcount functions */
528 extern void spa_open_ref(spa_t *spa, void *tag);
529 extern void spa_close(spa_t *spa, void *tag);
530 extern boolean_t spa_refcount_zero(spa_t *spa);
531
532 #define SCL_NONE 0x00
533 #define SCL_CONFIG 0x01
534 #define SCL_STATE 0x02
535 #define SCL_L2ARC 0x04 /* hack until L2ARC 2.0 */
536 #define SCL_ALLOC 0x08
537 #define SCL_ZIO 0x10
538 #define SCL_FREE 0x20
539 #define SCL_VDEV 0x40
540 #define SCL_LOCKS 7
541 #define SCL_ALL ((1 << SCL_LOCKS) - 1)
542 #define SCL_STATE_ALL (SCL_STATE | SCL_L2ARC | SCL_ZIO)
543
544 /* Pool configuration locks */
545 extern int spa_config_tryenter(spa_t *spa, int locks, void *tag, krw_t rw);
546 extern void spa_config_enter(spa_t *spa, int locks, void *tag, krw_t rw);
547 extern void spa_config_exit(spa_t *spa, int locks, void *tag);
548 extern int spa_config_held(spa_t *spa, int locks, krw_t rw);
549
550 /* Pool vdev add/remove lock */
551 extern uint64_t spa_vdev_enter(spa_t *spa);
552 extern uint64_t spa_vdev_config_enter(spa_t *spa);
553 extern void spa_vdev_config_exit(spa_t *spa, vdev_t *vd, uint64_t txg,
554 int error, char *tag);
555 extern int spa_vdev_exit(spa_t *spa, vdev_t *vd, uint64_t txg, int error);
556
557 /* Pool vdev state change lock */
558 extern void spa_vdev_state_enter(spa_t *spa, int oplock);
559 extern int spa_vdev_state_exit(spa_t *spa, vdev_t *vd, int error);
560
561 /* Log state */
562 typedef enum spa_log_state {
563 SPA_LOG_UNKNOWN = 0, /* unknown log state */
564 SPA_LOG_MISSING, /* missing log(s) */
565 SPA_LOG_CLEAR, /* clear the log(s) */
566 SPA_LOG_GOOD, /* log(s) are good */
567 } spa_log_state_t;
568
569 extern spa_log_state_t spa_get_log_state(spa_t *spa);
570 extern void spa_set_log_state(spa_t *spa, spa_log_state_t state);
571 extern int spa_offline_log(spa_t *spa);
572
573 /* Log claim callback */
574 extern void spa_claim_notify(zio_t *zio);
575
576 /* Accessor functions */
577 extern boolean_t spa_shutting_down(spa_t *spa);
578 extern struct dsl_pool *spa_get_dsl(spa_t *spa);
579 extern boolean_t spa_is_initializing(spa_t *spa);
580 extern blkptr_t *spa_get_rootblkptr(spa_t *spa);
581 extern void spa_set_rootblkptr(spa_t *spa, const blkptr_t *bp);
582 extern void spa_altroot(spa_t *, char *, size_t);
583 extern int spa_sync_pass(spa_t *spa);
584 extern char *spa_name(spa_t *spa);
585 extern uint64_t spa_guid(spa_t *spa);
586 extern uint64_t spa_load_guid(spa_t *spa);
587 extern uint64_t spa_last_synced_txg(spa_t *spa);
588 extern uint64_t spa_first_txg(spa_t *spa);
589 extern uint64_t spa_syncing_txg(spa_t *spa);
590 extern uint64_t spa_version(spa_t *spa);
591 extern pool_state_t spa_state(spa_t *spa);
592 extern spa_load_state_t spa_load_state(spa_t *spa);
593 extern uint64_t spa_freeze_txg(spa_t *spa);
594 extern uint64_t spa_get_asize(spa_t *spa, uint64_t lsize);
595 extern uint64_t spa_get_dspace(spa_t *spa);
596 extern void spa_update_dspace(spa_t *spa);
597 extern uint64_t spa_version(spa_t *spa);
598 extern boolean_t spa_deflate(spa_t *spa);
599 extern metaslab_class_t *spa_normal_class(spa_t *spa);
600 extern metaslab_class_t *spa_log_class(spa_t *spa);
601 extern int spa_max_replication(spa_t *spa);
602 extern int spa_prev_software_version(spa_t *spa);
603 extern int spa_busy(void);
604 extern uint8_t spa_get_failmode(spa_t *spa);
605 extern boolean_t spa_suspended(spa_t *spa);
606 extern uint64_t spa_bootfs(spa_t *spa);
607 extern uint64_t spa_delegation(spa_t *spa);
608 extern objset_t *spa_meta_objset(spa_t *spa);
609 extern uint64_t spa_deadman_synctime(spa_t *spa);
610
611 /* Miscellaneous support routines */
612 extern void spa_activate_mos_feature(spa_t *spa, const char *feature);
613 extern void spa_deactivate_mos_feature(spa_t *spa, const char *feature);
614 extern int spa_rename(const char *oldname, const char *newname);
615 extern spa_t *spa_by_guid(uint64_t pool_guid, uint64_t device_guid);
616 extern boolean_t spa_guid_exists(uint64_t pool_guid, uint64_t device_guid);
617 extern char *spa_strdup(const char *);
618 extern void spa_strfree(char *);
619 extern uint64_t spa_get_random(uint64_t range);
620 extern uint64_t spa_generate_guid(spa_t *spa);
621 extern void sprintf_blkptr(char *buf, const blkptr_t *bp);
622 extern void spa_freeze(spa_t *spa);
623 extern int spa_change_guid(spa_t *spa);
624 extern void spa_upgrade(spa_t *spa, uint64_t version);
625 extern void spa_evict_all(void);
626 extern vdev_t *spa_lookup_by_guid(spa_t *spa, uint64_t guid,
627 boolean_t l2cache);
628 extern boolean_t spa_has_spare(spa_t *, uint64_t guid);
629 extern uint64_t dva_get_dsize_sync(spa_t *spa, const dva_t *dva);
630 extern uint64_t bp_get_dsize_sync(spa_t *spa, const blkptr_t *bp);
631 extern uint64_t bp_get_dsize(spa_t *spa, const blkptr_t *bp);
632 extern boolean_t spa_has_slogs(spa_t *spa);
633 extern boolean_t spa_is_root(spa_t *spa);
634 extern boolean_t spa_writeable(spa_t *spa);
635
636 /* Salted checksum handling */
637 extern int spa_activate_salted_cksum(spa_t *spa, struct zfeature_info *feature);
638
639 extern int spa_mode(spa_t *spa);
640 extern uint64_t strtonum(const char *str, char **nptr);
641
642 extern char *spa_his_ievent_table[];
643
644 extern void spa_history_create_obj(spa_t *spa, dmu_tx_t *tx);
645 extern int spa_history_get(spa_t *spa, uint64_t *offset, uint64_t *len_read,
646 char *his_buf);
647 extern int spa_history_log(spa_t *spa, const char *his_buf);
648 extern int spa_history_log_nvl(spa_t *spa, nvlist_t *nvl);
649 extern void spa_history_log_version(spa_t *spa, const char *operation);
650 extern void spa_history_log_internal(spa_t *spa, const char *operation,
651 dmu_tx_t *tx, const char *fmt, ...);
652 extern void spa_history_log_internal_ds(struct dsl_dataset *ds, const char *op,
653 dmu_tx_t *tx, const char *fmt, ...);
654 extern void spa_history_log_internal_dd(dsl_dir_t *dd, const char *operation,
655 dmu_tx_t *tx, const char *fmt, ...);
656
657 /* error handling */
658 struct zbookmark;
659 extern void spa_log_error(spa_t *spa, zio_t *zio);
660 extern void zfs_ereport_post(const char *class, spa_t *spa, vdev_t *vd,
661 zio_t *zio, uint64_t stateoroffset, uint64_t length);
662 extern void zfs_post_remove(spa_t *spa, vdev_t *vd);
663 extern void zfs_post_state_change(spa_t *spa, vdev_t *vd);
664 extern void zfs_post_autoreplace(spa_t *spa, vdev_t *vd);
665 extern uint64_t spa_get_errlog_size(spa_t *spa);
666 extern int spa_get_errlog(spa_t *spa, void *uaddr, size_t *count);
667 extern void spa_errlog_rotate(spa_t *spa);
668 extern void spa_errlog_drain(spa_t *spa);
669 extern void spa_errlog_sync(spa_t *spa, uint64_t txg);
670 extern void spa_get_errlists(spa_t *spa, avl_tree_t *last, avl_tree_t *scrub);
671
672 /* vdev cache */
673 extern void vdev_cache_stat_init(void);
674 extern void vdev_cache_stat_fini(void);
675
676 /* Initialization and termination */
677 extern void spa_init(int flags);
678 extern void spa_fini(void);
679 extern void spa_boot_init();
680
681 /* properties */
682 extern int spa_prop_set(spa_t *spa, nvlist_t *nvp);
683 extern int spa_prop_get(spa_t *spa, nvlist_t **nvp);
684 extern void spa_prop_clear_bootfs(spa_t *spa, uint64_t obj, dmu_tx_t *tx);
685 extern void spa_configfile_set(spa_t *, nvlist_t *, boolean_t);
686
687 /* asynchronous event notification */
688 extern void spa_event_notify(spa_t *spa, vdev_t *vdev, const char *name);
689
690 #ifdef ZFS_DEBUG
691 #define dprintf_bp(bp, fmt, ...) do { \
692 if (zfs_flags & ZFS_DEBUG_DPRINTF) { \
693 char *__blkbuf = kmem_alloc(BP_SPRINTF_LEN, KM_SLEEP); \
694 sprintf_blkptr(__blkbuf, (bp)); \
695 dprintf(fmt " %s\n", __VA_ARGS__, __blkbuf); \
696 kmem_free(__blkbuf, BP_SPRINTF_LEN); \
697 } \
698 _NOTE(CONSTCOND) } while (0)
699 #else
700 #define dprintf_bp(bp, fmt, ...)
701 #endif
702
703 extern boolean_t spa_debug_enabled(spa_t *spa);
704 #define spa_dbgmsg(spa, ...) \
705 { \
706 if (spa_debug_enabled(spa)) \
707 zfs_dbgmsg(__VA_ARGS__); \
708 }
709
710 extern int spa_mode_global; /* mode, e.g. FREAD | FWRITE */
711
712 #ifdef __cplusplus
713 }
714 #endif
715
716 #endif /* _SYS_SPA_H */