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.
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.
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]
22 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
23 * Copyright (c) 2013 by Delphix. All rights reserved.
24 * Copyright 2011 Nexenta Systems, Inc. All rights reserved.
31 #include <sys/zfs_context.h>
32 #include <sys/nvpair.h>
33 #include <sys/sysmacros.h>
34 #include <sys/types.h>
35 #include <sys/fs/zfs.h>
42 * Forward references that lots of things need.
44 typedef struct spa spa_t;
45 typedef struct vdev vdev_t;
46 typedef struct metaslab metaslab_t;
47 typedef struct metaslab_group metaslab_group_t;
48 typedef struct metaslab_class metaslab_class_t;
49 typedef struct zio zio_t;
50 typedef struct zilog zilog_t;
51 typedef struct spa_aux_vdev spa_aux_vdev_t;
52 typedef struct ddt ddt_t;
53 typedef struct ddt_entry ddt_entry_t;
58 * General-purpose 32-bit and 64-bit bitfield encodings.
60 #define BF32_DECODE(x, low, len) P2PHASE((x) >> (low), 1U << (len))
61 #define BF64_DECODE(x, low, len) P2PHASE((x) >> (low), 1ULL << (len))
62 #define BF32_ENCODE(x, low, len) (P2PHASE((x), 1U << (len)) << (low))
63 #define BF64_ENCODE(x, low, len) (P2PHASE((x), 1ULL << (len)) << (low))
65 #define BF32_GET(x, low, len) BF32_DECODE(x, low, len)
66 #define BF64_GET(x, low, len) BF64_DECODE(x, low, len)
68 #define BF32_SET(x, low, len, val) do { \
69 ASSERT3U(val, <, 1U << (len)); \
70 ASSERT3U(low + len, <=, 32); \
71 (x) ^= BF32_ENCODE((x >> low) ^ (val), low, len); \
72 _NOTE(CONSTCOND) } while (0)
74 #define BF64_SET(x, low, len, val) do { \
75 ASSERT3U(val, <, 1ULL << (len)); \
76 ASSERT3U(low + len, <=, 64); \
77 ((x) ^= BF64_ENCODE((x >> low) ^ (val), low, len)); \
78 _NOTE(CONSTCOND) } while (0)
80 #define BF32_GET_SB(x, low, len, shift, bias) \
81 ((BF32_GET(x, low, len) + (bias)) << (shift))
82 #define BF64_GET_SB(x, low, len, shift, bias) \
83 ((BF64_GET(x, low, len) + (bias)) << (shift))
85 #define BF32_SET_SB(x, low, len, shift, bias, val) do { \
86 ASSERT(IS_P2ALIGNED(val, 1U << shift)); \
87 ASSERT3S((val) >> (shift), >=, bias); \
88 BF32_SET(x, low, len, ((val) >> (shift)) - (bias)); \
89 _NOTE(CONSTCOND) } while (0)
90 #define BF64_SET_SB(x, low, len, shift, bias, val) do { \
91 ASSERT(IS_P2ALIGNED(val, 1ULL << shift)); \
92 ASSERT3S((val) >> (shift), >=, bias); \
93 BF64_SET(x, low, len, ((val) >> (shift)) - (bias)); \
94 _NOTE(CONSTCOND) } while (0)
97 * We currently support nine block sizes, from 512 bytes to 128K.
98 * We could go higher, but the benefits are near-zero and the cost
99 * of COWing a giant block to modify one byte would become excessive.
101 #define SPA_MINBLOCKSHIFT 9
102 #define SPA_MAXBLOCKSHIFT 17
103 #define SPA_MINBLOCKSIZE (1ULL << SPA_MINBLOCKSHIFT)
104 #define SPA_MAXBLOCKSIZE (1ULL << SPA_MAXBLOCKSHIFT)
106 #define SPA_BLOCKSIZES (SPA_MAXBLOCKSHIFT - SPA_MINBLOCKSHIFT + 1)
109 * Maximum supported logical ashift.
111 * The current 8k allocation block size limit is due to the 8k
112 * aligned/sized operations performed by vdev_probe() on
113 * vdev_label->vl_pad2. Using another "safe region" for these tests
114 * would allow the limit to be raised to 16k, at the expense of
115 * only having 8 available uberblocks in the label area.
117 #define SPA_MAXASHIFT 13
120 * Size of block to hold the configuration data (a packed nvlist)
122 #define SPA_CONFIG_BLOCKSIZE (1ULL << 14)
125 * The DVA size encodings for LSIZE and PSIZE support blocks up to 32MB.
126 * The ASIZE encoding should be at least 64 times larger (6 more bits)
127 * to support up to 4-way RAID-Z mirror mode with worst-case gang block
128 * overhead, three DVAs per bp, plus one more bit in case we do anything
129 * else that expands the ASIZE.
131 #define SPA_LSIZEBITS 16 /* LSIZE up to 32M (2^16 * 512) */
132 #define SPA_PSIZEBITS 16 /* PSIZE up to 32M (2^16 * 512) */
133 #define SPA_ASIZEBITS 24 /* ASIZE up to 64 times larger */
136 * All SPA data is represented by 128-bit data virtual addresses (DVAs).
137 * The members of the dva_t should be considered opaque outside the SPA.
140 uint64_t dva_word[2];
144 * Each block has a 256-bit checksum -- strong enough for cryptographic hashes.
146 typedef struct zio_cksum {
151 * Each block is described by its DVAs, time of birth, checksum, etc.
152 * The word-by-word, bit-by-bit layout of the blkptr is as follows:
154 * 64 56 48 40 32 24 16 8 0
155 * +-------+-------+-------+-------+-------+-------+-------+-------+
156 * 0 | vdev1 | GRID | ASIZE |
157 * +-------+-------+-------+-------+-------+-------+-------+-------+
159 * +-------+-------+-------+-------+-------+-------+-------+-------+
160 * 2 | vdev2 | GRID | ASIZE |
161 * +-------+-------+-------+-------+-------+-------+-------+-------+
163 * +-------+-------+-------+-------+-------+-------+-------+-------+
164 * 4 | vdev3 | GRID | ASIZE |
165 * +-------+-------+-------+-------+-------+-------+-------+-------+
167 * +-------+-------+-------+-------+-------+-------+-------+-------+
168 * 6 |BDX|lvl| type | cksum | comp | PSIZE | LSIZE |
169 * +-------+-------+-------+-------+-------+-------+-------+-------+
171 * +-------+-------+-------+-------+-------+-------+-------+-------+
173 * +-------+-------+-------+-------+-------+-------+-------+-------+
174 * 9 | physical birth txg |
175 * +-------+-------+-------+-------+-------+-------+-------+-------+
176 * a | logical birth txg |
177 * +-------+-------+-------+-------+-------+-------+-------+-------+
179 * +-------+-------+-------+-------+-------+-------+-------+-------+
181 * +-------+-------+-------+-------+-------+-------+-------+-------+
183 * +-------+-------+-------+-------+-------+-------+-------+-------+
185 * +-------+-------+-------+-------+-------+-------+-------+-------+
187 * +-------+-------+-------+-------+-------+-------+-------+-------+
191 * vdev virtual device ID
192 * offset offset into virtual device
194 * PSIZE physical size (after compression)
195 * ASIZE allocated size (including RAID-Z parity and gang block headers)
196 * GRID RAID-Z layout information (reserved for future use)
197 * cksum checksum function
198 * comp compression function
199 * G gang block indicator
200 * B byteorder (endianness)
203 * lvl level of indirection
204 * type DMU object type
205 * phys birth txg of block allocation; zero if same as logical birth txg
206 * log. birth transaction group in which the block was logically born
207 * fill count number of non-zero blocks under this bp
208 * checksum[4] 256-bit checksum of the data this bp describes
210 #define SPA_BLKPTRSHIFT 7 /* blkptr_t is 128 bytes */
211 #define SPA_DVAS_PER_BP 3 /* Number of DVAs in a bp */
214 * A block is a hole when it has either 1) never been written to, or
215 * 2) is zero-filled. In both cases, ZFS can return all zeroes for all reads
216 * without physically allocating disk space. Holes are represented in the
217 * blkptr_t structure by zeroed blk_dva. Correct checking for holes is
218 * done through the BP_IS_HOLE macro. For holes, the logical size, level,
219 * DMU object type, and birth times are all also stored for holes that
220 * were written to at some point (i.e. were punched after having been filled).
222 typedef struct blkptr {
223 dva_t blk_dva[SPA_DVAS_PER_BP]; /* Data Virtual Addresses */
224 uint64_t blk_prop; /* size, compression, type, etc */
225 uint64_t blk_pad[2]; /* Extra space for the future */
226 uint64_t blk_phys_birth; /* txg when block was allocated */
227 uint64_t blk_birth; /* transaction group at birth */
228 uint64_t blk_fill; /* fill count */
229 zio_cksum_t blk_cksum; /* 256-bit checksum */
233 * Macros to get and set fields in a bp or DVA.
235 #define DVA_GET_ASIZE(dva) \
236 BF64_GET_SB((dva)->dva_word[0], 0, SPA_ASIZEBITS, SPA_MINBLOCKSHIFT, 0)
237 #define DVA_SET_ASIZE(dva, x) \
238 BF64_SET_SB((dva)->dva_word[0], 0, SPA_ASIZEBITS, \
239 SPA_MINBLOCKSHIFT, 0, x)
241 #define DVA_GET_GRID(dva) BF64_GET((dva)->dva_word[0], 24, 8)
242 #define DVA_SET_GRID(dva, x) BF64_SET((dva)->dva_word[0], 24, 8, x)
244 #define DVA_GET_VDEV(dva) BF64_GET((dva)->dva_word[0], 32, 32)
245 #define DVA_SET_VDEV(dva, x) BF64_SET((dva)->dva_word[0], 32, 32, x)
247 #define DVA_GET_OFFSET(dva) \
248 BF64_GET_SB((dva)->dva_word[1], 0, 63, SPA_MINBLOCKSHIFT, 0)
249 #define DVA_SET_OFFSET(dva, x) \
250 BF64_SET_SB((dva)->dva_word[1], 0, 63, SPA_MINBLOCKSHIFT, 0, x)
252 #define DVA_GET_GANG(dva) BF64_GET((dva)->dva_word[1], 63, 1)
253 #define DVA_SET_GANG(dva, x) BF64_SET((dva)->dva_word[1], 63, 1, x)
255 #define BP_GET_LSIZE(bp) \
256 BF64_GET_SB((bp)->blk_prop, 0, SPA_LSIZEBITS, SPA_MINBLOCKSHIFT, 1)
257 #define BP_SET_LSIZE(bp, x) \
258 BF64_SET_SB((bp)->blk_prop, 0, SPA_LSIZEBITS, SPA_MINBLOCKSHIFT, 1, x)
260 #define BP_GET_PSIZE(bp) \
261 BF64_GET_SB((bp)->blk_prop, 16, SPA_PSIZEBITS, SPA_MINBLOCKSHIFT, 1)
262 #define BP_SET_PSIZE(bp, x) \
263 BF64_SET_SB((bp)->blk_prop, 16, SPA_PSIZEBITS, SPA_MINBLOCKSHIFT, 1, x)
265 #define BP_GET_COMPRESS(bp) BF64_GET((bp)->blk_prop, 32, 8)
266 #define BP_SET_COMPRESS(bp, x) BF64_SET((bp)->blk_prop, 32, 8, x)
268 #define BP_GET_CHECKSUM(bp) BF64_GET((bp)->blk_prop, 40, 8)
269 #define BP_SET_CHECKSUM(bp, x) BF64_SET((bp)->blk_prop, 40, 8, x)
271 #define BP_GET_TYPE(bp) BF64_GET((bp)->blk_prop, 48, 8)
272 #define BP_SET_TYPE(bp, x) BF64_SET((bp)->blk_prop, 48, 8, x)
274 #define BP_GET_LEVEL(bp) BF64_GET((bp)->blk_prop, 56, 5)
275 #define BP_SET_LEVEL(bp, x) BF64_SET((bp)->blk_prop, 56, 5, x)
277 #define BP_GET_PROP_BIT_61(bp) BF64_GET((bp)->blk_prop, 61, 1)
278 #define BP_SET_PROP_BIT_61(bp, x) BF64_SET((bp)->blk_prop, 61, 1, x)
280 #define BP_GET_DEDUP(bp) BF64_GET((bp)->blk_prop, 62, 1)
281 #define BP_SET_DEDUP(bp, x) BF64_SET((bp)->blk_prop, 62, 1, x)
283 #define BP_GET_BYTEORDER(bp) BF64_GET((bp)->blk_prop, 63, 1)
284 #define BP_SET_BYTEORDER(bp, x) BF64_SET((bp)->blk_prop, 63, 1, x)
286 #define BP_PHYSICAL_BIRTH(bp) \
287 ((bp)->blk_phys_birth ? (bp)->blk_phys_birth : (bp)->blk_birth)
289 #define BP_SET_BIRTH(bp, logical, physical) \
291 (bp)->blk_birth = (logical); \
292 (bp)->blk_phys_birth = ((logical) == (physical) ? 0 : (physical)); \
295 #define BP_GET_ASIZE(bp) \
296 (DVA_GET_ASIZE(&(bp)->blk_dva[0]) + DVA_GET_ASIZE(&(bp)->blk_dva[1]) + \
297 DVA_GET_ASIZE(&(bp)->blk_dva[2]))
299 #define BP_GET_UCSIZE(bp) \
300 ((BP_GET_LEVEL(bp) > 0 || DMU_OT_IS_METADATA(BP_GET_TYPE(bp))) ? \
301 BP_GET_PSIZE(bp) : BP_GET_LSIZE(bp))
303 #define BP_GET_NDVAS(bp) \
304 (!!DVA_GET_ASIZE(&(bp)->blk_dva[0]) + \
305 !!DVA_GET_ASIZE(&(bp)->blk_dva[1]) + \
306 !!DVA_GET_ASIZE(&(bp)->blk_dva[2]))
308 #define BP_COUNT_GANG(bp) \
309 (DVA_GET_GANG(&(bp)->blk_dva[0]) + \
310 DVA_GET_GANG(&(bp)->blk_dva[1]) + \
311 DVA_GET_GANG(&(bp)->blk_dva[2]))
313 #define DVA_EQUAL(dva1, dva2) \
314 ((dva1)->dva_word[1] == (dva2)->dva_word[1] && \
315 (dva1)->dva_word[0] == (dva2)->dva_word[0])
317 #define BP_EQUAL(bp1, bp2) \
318 (BP_PHYSICAL_BIRTH(bp1) == BP_PHYSICAL_BIRTH(bp2) && \
319 DVA_EQUAL(&(bp1)->blk_dva[0], &(bp2)->blk_dva[0]) && \
320 DVA_EQUAL(&(bp1)->blk_dva[1], &(bp2)->blk_dva[1]) && \
321 DVA_EQUAL(&(bp1)->blk_dva[2], &(bp2)->blk_dva[2]))
323 #define ZIO_CHECKSUM_EQUAL(zc1, zc2) \
324 (0 == (((zc1).zc_word[0] - (zc2).zc_word[0]) | \
325 ((zc1).zc_word[1] - (zc2).zc_word[1]) | \
326 ((zc1).zc_word[2] - (zc2).zc_word[2]) | \
327 ((zc1).zc_word[3] - (zc2).zc_word[3])))
329 #define DVA_IS_VALID(dva) (DVA_GET_ASIZE(dva) != 0)
331 #define ZIO_SET_CHECKSUM(zcp, w0, w1, w2, w3) \
333 (zcp)->zc_word[0] = w0; \
334 (zcp)->zc_word[1] = w1; \
335 (zcp)->zc_word[2] = w2; \
336 (zcp)->zc_word[3] = w3; \
339 #define BP_IDENTITY(bp) (&(bp)->blk_dva[0])
340 #define BP_IS_GANG(bp) DVA_GET_GANG(BP_IDENTITY(bp))
341 #define DVA_IS_EMPTY(dva) ((dva)->dva_word[0] == 0ULL && \
342 (dva)->dva_word[1] == 0ULL)
343 #define BP_IS_HOLE(bp) DVA_IS_EMPTY(BP_IDENTITY(bp))
345 /* BP_IS_RAIDZ(bp) assumes no block compression */
346 #define BP_IS_RAIDZ(bp) (DVA_GET_ASIZE(&(bp)->blk_dva[0]) > \
349 #define BP_ZERO(bp) \
351 (bp)->blk_dva[0].dva_word[0] = 0; \
352 (bp)->blk_dva[0].dva_word[1] = 0; \
353 (bp)->blk_dva[1].dva_word[0] = 0; \
354 (bp)->blk_dva[1].dva_word[1] = 0; \
355 (bp)->blk_dva[2].dva_word[0] = 0; \
356 (bp)->blk_dva[2].dva_word[1] = 0; \
357 (bp)->blk_prop = 0; \
358 (bp)->blk_pad[0] = 0; \
359 (bp)->blk_pad[1] = 0; \
360 (bp)->blk_phys_birth = 0; \
361 (bp)->blk_birth = 0; \
362 (bp)->blk_fill = 0; \
363 ZIO_SET_CHECKSUM(&(bp)->blk_cksum, 0, 0, 0, 0); \
366 #if BYTE_ORDER == _BIG_ENDIAN
367 #define ZFS_HOST_BYTEORDER (0ULL)
369 #define ZFS_HOST_BYTEORDER (1ULL)
372 #define BP_SHOULD_BYTESWAP(bp) (BP_GET_BYTEORDER(bp) != ZFS_HOST_BYTEORDER)
374 #define BP_SPRINTF_LEN 320
377 * This macro allows code sharing between zfs, libzpool, and mdb.
378 * 'func' is either snprintf() or mdb_snprintf().
379 * 'ws' (whitespace) can be ' ' for single-line format, '\n' for multi-line.
381 #define SNPRINTF_BLKPTR(func, ws, buf, size, bp, type, checksum, compress) \
383 static const char *copyname[] = \
384 { "zero", "single", "double", "triple" }; \
389 len += func(buf + len, size - len, "<NULL>"); \
390 } else if (BP_IS_HOLE(bp)) { \
391 len += func(buf + len, size - len, "<hole>"); \
392 if (bp->blk_birth > 0) { \
393 len += func(buf + len, size - len, \
395 (u_longlong_t)bp->blk_birth); \
398 for (int d = 0; d < BP_GET_NDVAS(bp); d++) { \
399 const dva_t *dva = &bp->blk_dva[d]; \
400 if (DVA_IS_VALID(dva)) \
402 len += func(buf + len, size - len, \
403 "DVA[%d]=<%llu:%llx:%llx>%c", d, \
404 (u_longlong_t)DVA_GET_VDEV(dva), \
405 (u_longlong_t)DVA_GET_OFFSET(dva), \
406 (u_longlong_t)DVA_GET_ASIZE(dva), \
409 if (BP_IS_GANG(bp) && \
410 DVA_GET_ASIZE(&bp->blk_dva[2]) <= \
411 DVA_GET_ASIZE(&bp->blk_dva[1]) / 2) \
413 len += func(buf + len, size - len, \
414 "[L%llu %s] %s %s %s %s %s %s%c" \
415 "size=%llxL/%llxP birth=%lluL/%lluP fill=%llu%c" \
416 "cksum=%llx:%llx:%llx:%llx", \
417 (u_longlong_t)BP_GET_LEVEL(bp), \
421 BP_GET_BYTEORDER(bp) == 0 ? "BE" : "LE", \
422 BP_IS_GANG(bp) ? "gang" : "contiguous", \
423 BP_GET_DEDUP(bp) ? "dedup" : "unique", \
426 (u_longlong_t)BP_GET_LSIZE(bp), \
427 (u_longlong_t)BP_GET_PSIZE(bp), \
428 (u_longlong_t)bp->blk_birth, \
429 (u_longlong_t)BP_PHYSICAL_BIRTH(bp), \
430 (u_longlong_t)bp->blk_fill, \
432 (u_longlong_t)bp->blk_cksum.zc_word[0], \
433 (u_longlong_t)bp->blk_cksum.zc_word[1], \
434 (u_longlong_t)bp->blk_cksum.zc_word[2], \
435 (u_longlong_t)bp->blk_cksum.zc_word[3]); \
437 ASSERT(len < size); \
442 #define BP_GET_BUFC_TYPE(bp) \
443 (((BP_GET_LEVEL(bp) > 0) || (DMU_OT_IS_METADATA(BP_GET_TYPE(bp)))) ? \
444 ARC_BUFC_METADATA : ARC_BUFC_DATA)
446 typedef enum spa_import_type {
451 /* state manipulation functions */
452 extern int spa_open(const char *pool, spa_t **, void *tag);
453 extern int spa_open_rewind(const char *pool, spa_t **, void *tag,
454 nvlist_t *policy, nvlist_t **config);
455 extern int spa_get_stats(const char *pool, nvlist_t **config, char *altroot,
457 extern int spa_create(const char *pool, nvlist_t *config, nvlist_t *props,
460 extern int spa_import_rootpool(char *devpath, char *devid);
462 extern int spa_import_rootpool(const char *name);
464 extern int spa_import(const char *pool, nvlist_t *config, nvlist_t *props,
466 extern nvlist_t *spa_tryimport(nvlist_t *tryconfig);
467 extern int spa_destroy(char *pool);
468 extern int spa_export(char *pool, nvlist_t **oldconfig, boolean_t force,
469 boolean_t hardforce);
470 extern int spa_reset(char *pool);
471 extern void spa_async_request(spa_t *spa, int flag);
472 extern void spa_async_unrequest(spa_t *spa, int flag);
473 extern void spa_async_suspend(spa_t *spa);
474 extern void spa_async_resume(spa_t *spa);
475 extern spa_t *spa_inject_addref(char *pool);
476 extern void spa_inject_delref(spa_t *spa);
477 extern void spa_scan_stat_init(spa_t *spa);
478 extern int spa_scan_get_stats(spa_t *spa, pool_scan_stat_t *ps);
480 #define SPA_ASYNC_CONFIG_UPDATE 0x01
481 #define SPA_ASYNC_REMOVE 0x02
482 #define SPA_ASYNC_PROBE 0x04
483 #define SPA_ASYNC_RESILVER_DONE 0x08
484 #define SPA_ASYNC_RESILVER 0x10
485 #define SPA_ASYNC_AUTOEXPAND 0x20
486 #define SPA_ASYNC_REMOVE_DONE 0x40
487 #define SPA_ASYNC_REMOVE_STOP 0x80
490 * Controls the behavior of spa_vdev_remove().
492 #define SPA_REMOVE_UNSPARE 0x01
493 #define SPA_REMOVE_DONE 0x02
495 /* device manipulation */
496 extern int spa_vdev_add(spa_t *spa, nvlist_t *nvroot);
497 extern int spa_vdev_attach(spa_t *spa, uint64_t guid, nvlist_t *nvroot,
499 extern int spa_vdev_detach(spa_t *spa, uint64_t guid, uint64_t pguid,
501 extern int spa_vdev_remove(spa_t *spa, uint64_t guid, boolean_t unspare);
502 extern boolean_t spa_vdev_remove_active(spa_t *spa);
503 extern int spa_vdev_setpath(spa_t *spa, uint64_t guid, const char *newpath);
504 extern int spa_vdev_setfru(spa_t *spa, uint64_t guid, const char *newfru);
505 extern int spa_vdev_split_mirror(spa_t *spa, char *newname, nvlist_t *config,
506 nvlist_t *props, boolean_t exp);
508 /* spare state (which is global across all pools) */
509 extern void spa_spare_add(vdev_t *vd);
510 extern void spa_spare_remove(vdev_t *vd);
511 extern boolean_t spa_spare_exists(uint64_t guid, uint64_t *pool, int *refcnt);
512 extern void spa_spare_activate(vdev_t *vd);
514 /* L2ARC state (which is global across all pools) */
515 extern void spa_l2cache_add(vdev_t *vd);
516 extern void spa_l2cache_remove(vdev_t *vd);
517 extern boolean_t spa_l2cache_exists(uint64_t guid, uint64_t *pool);
518 extern void spa_l2cache_activate(vdev_t *vd);
519 extern void spa_l2cache_drop(spa_t *spa);
522 extern int spa_scan(spa_t *spa, pool_scan_func_t func);
523 extern int spa_scan_stop(spa_t *spa);
526 extern void spa_sync(spa_t *spa, uint64_t txg); /* only for DMU use */
527 extern void spa_sync_allpools(void);
529 /* spa namespace global mutex */
530 extern kmutex_t spa_namespace_lock;
533 * SPA configuration functions in spa_config.c
536 #define SPA_CONFIG_UPDATE_POOL 0
537 #define SPA_CONFIG_UPDATE_VDEVS 1
539 extern void spa_config_sync(spa_t *, boolean_t, boolean_t);
540 extern void spa_config_load(void);
541 extern nvlist_t *spa_all_configs(uint64_t *);
542 extern void spa_config_set(spa_t *spa, nvlist_t *config);
543 extern nvlist_t *spa_config_generate(spa_t *spa, vdev_t *vd, uint64_t txg,
545 extern void spa_config_update(spa_t *spa, int what);
548 * Miscellaneous SPA routines in spa_misc.c
551 /* Namespace manipulation */
552 extern spa_t *spa_lookup(const char *name);
553 extern spa_t *spa_add(const char *name, nvlist_t *config, const char *altroot);
554 extern void spa_remove(spa_t *spa);
555 extern spa_t *spa_next(spa_t *prev);
557 /* Refcount functions */
558 extern void spa_open_ref(spa_t *spa, void *tag);
559 extern void spa_close(spa_t *spa, void *tag);
560 extern boolean_t spa_refcount_zero(spa_t *spa);
562 #define SCL_NONE 0x00
563 #define SCL_CONFIG 0x01
564 #define SCL_STATE 0x02
565 #define SCL_L2ARC 0x04 /* hack until L2ARC 2.0 */
566 #define SCL_ALLOC 0x08
568 #define SCL_FREE 0x20
569 #define SCL_VDEV 0x40
571 #define SCL_ALL ((1 << SCL_LOCKS) - 1)
572 #define SCL_STATE_ALL (SCL_STATE | SCL_L2ARC | SCL_ZIO)
574 /* Pool configuration locks */
575 extern int spa_config_tryenter(spa_t *spa, int locks, void *tag, krw_t rw);
576 extern void spa_config_enter(spa_t *spa, int locks, void *tag, krw_t rw);
577 extern void spa_config_exit(spa_t *spa, int locks, void *tag);
578 extern int spa_config_held(spa_t *spa, int locks, krw_t rw);
580 /* Pool vdev add/remove lock */
581 extern uint64_t spa_vdev_enter(spa_t *spa);
582 extern uint64_t spa_vdev_config_enter(spa_t *spa);
583 extern void spa_vdev_config_exit(spa_t *spa, vdev_t *vd, uint64_t txg,
584 int error, char *tag);
585 extern int spa_vdev_exit(spa_t *spa, vdev_t *vd, uint64_t txg, int error);
587 /* Pool vdev state change lock */
588 extern void spa_vdev_state_enter(spa_t *spa, int oplock);
589 extern int spa_vdev_state_exit(spa_t *spa, vdev_t *vd, int error);
592 typedef enum spa_log_state {
593 SPA_LOG_UNKNOWN = 0, /* unknown log state */
594 SPA_LOG_MISSING, /* missing log(s) */
595 SPA_LOG_CLEAR, /* clear the log(s) */
596 SPA_LOG_GOOD, /* log(s) are good */
599 extern spa_log_state_t spa_get_log_state(spa_t *spa);
600 extern void spa_set_log_state(spa_t *spa, spa_log_state_t state);
601 extern int spa_offline_log(spa_t *spa);
603 /* Log claim callback */
604 extern void spa_claim_notify(zio_t *zio);
606 /* Accessor functions */
607 extern boolean_t spa_shutting_down(spa_t *spa);
608 extern struct dsl_pool *spa_get_dsl(spa_t *spa);
609 extern boolean_t spa_is_initializing(spa_t *spa);
610 extern blkptr_t *spa_get_rootblkptr(spa_t *spa);
611 extern void spa_set_rootblkptr(spa_t *spa, const blkptr_t *bp);
612 extern void spa_altroot(spa_t *, char *, size_t);
613 extern int spa_sync_pass(spa_t *spa);
614 extern char *spa_name(spa_t *spa);
615 extern uint64_t spa_guid(spa_t *spa);
616 extern uint64_t spa_load_guid(spa_t *spa);
617 extern uint64_t spa_last_synced_txg(spa_t *spa);
618 extern uint64_t spa_first_txg(spa_t *spa);
619 extern uint64_t spa_syncing_txg(spa_t *spa);
620 extern uint64_t spa_version(spa_t *spa);
621 extern pool_state_t spa_state(spa_t *spa);
622 extern spa_load_state_t spa_load_state(spa_t *spa);
623 extern uint64_t spa_freeze_txg(spa_t *spa);
624 extern uint64_t spa_get_asize(spa_t *spa, uint64_t lsize);
625 extern uint64_t spa_get_dspace(spa_t *spa);
626 extern void spa_update_dspace(spa_t *spa);
627 extern uint64_t spa_version(spa_t *spa);
628 extern boolean_t spa_deflate(spa_t *spa);
629 extern metaslab_class_t *spa_normal_class(spa_t *spa);
630 extern metaslab_class_t *spa_log_class(spa_t *spa);
631 extern int spa_max_replication(spa_t *spa);
632 extern int spa_prev_software_version(spa_t *spa);
633 extern int spa_busy(void);
634 extern uint8_t spa_get_failmode(spa_t *spa);
635 extern boolean_t spa_suspended(spa_t *spa);
636 extern uint64_t spa_bootfs(spa_t *spa);
637 extern uint64_t spa_delegation(spa_t *spa);
638 extern objset_t *spa_meta_objset(spa_t *spa);
639 extern uint64_t spa_deadman_synctime(spa_t *spa);
641 /* Miscellaneous support routines */
642 extern void spa_activate_mos_feature(spa_t *spa, const char *feature,
644 extern void spa_deactivate_mos_feature(spa_t *spa, const char *feature);
645 extern int spa_rename(const char *oldname, const char *newname);
646 extern spa_t *spa_by_guid(uint64_t pool_guid, uint64_t device_guid);
647 extern boolean_t spa_guid_exists(uint64_t pool_guid, uint64_t device_guid);
648 extern char *spa_strdup(const char *);
649 extern void spa_strfree(char *);
650 extern uint64_t spa_get_random(uint64_t range);
651 extern uint64_t spa_generate_guid(spa_t *spa);
652 extern void snprintf_blkptr(char *buf, size_t buflen, const blkptr_t *bp);
653 extern void spa_freeze(spa_t *spa);
654 extern int spa_change_guid(spa_t *spa);
655 extern void spa_upgrade(spa_t *spa, uint64_t version);
656 extern void spa_evict_all(void);
657 extern vdev_t *spa_lookup_by_guid(spa_t *spa, uint64_t guid,
659 extern boolean_t spa_has_spare(spa_t *, uint64_t guid);
660 extern uint64_t dva_get_dsize_sync(spa_t *spa, const dva_t *dva);
661 extern uint64_t bp_get_dsize_sync(spa_t *spa, const blkptr_t *bp);
662 extern uint64_t bp_get_dsize(spa_t *spa, const blkptr_t *bp);
663 extern boolean_t spa_has_slogs(spa_t *spa);
664 extern boolean_t spa_is_root(spa_t *spa);
665 extern boolean_t spa_writeable(spa_t *spa);
667 extern int spa_mode(spa_t *spa);
668 extern uint64_t zfs_strtonum(const char *str, char **nptr);
669 #define strtonum(str, nptr) zfs_strtonum((str), (nptr))
671 extern char *spa_his_ievent_table[];
673 extern void spa_history_create_obj(spa_t *spa, dmu_tx_t *tx);
674 extern int spa_history_get(spa_t *spa, uint64_t *offset, uint64_t *len_read,
676 extern int spa_history_log(spa_t *spa, const char *his_buf);
677 extern int spa_history_log_nvl(spa_t *spa, nvlist_t *nvl);
678 extern void spa_history_log_version(spa_t *spa, const char *operation);
679 extern void spa_history_log_internal(spa_t *spa, const char *operation,
680 dmu_tx_t *tx, const char *fmt, ...);
681 extern void spa_history_log_internal_ds(struct dsl_dataset *ds, const char *op,
682 dmu_tx_t *tx, const char *fmt, ...);
683 extern void spa_history_log_internal_dd(dsl_dir_t *dd, const char *operation,
684 dmu_tx_t *tx, const char *fmt, ...);
688 extern void spa_log_error(spa_t *spa, zio_t *zio);
689 extern void zfs_ereport_post(const char *cls, spa_t *spa, vdev_t *vd,
690 zio_t *zio, uint64_t stateoroffset, uint64_t length);
691 extern void zfs_post_remove(spa_t *spa, vdev_t *vd);
692 extern void zfs_post_state_change(spa_t *spa, vdev_t *vd);
693 extern void zfs_post_autoreplace(spa_t *spa, vdev_t *vd);
694 extern uint64_t spa_get_errlog_size(spa_t *spa);
695 extern int spa_get_errlog(spa_t *spa, void *uaddr, size_t *count);
696 extern void spa_errlog_rotate(spa_t *spa);
697 extern void spa_errlog_drain(spa_t *spa);
698 extern void spa_errlog_sync(spa_t *spa, uint64_t txg);
699 extern void spa_get_errlists(spa_t *spa, avl_tree_t *last, avl_tree_t *scrub);
702 extern void vdev_cache_stat_init(void);
703 extern void vdev_cache_stat_fini(void);
705 /* Initialization and termination */
706 extern void spa_init(int flags);
707 extern void spa_fini(void);
708 extern void spa_boot_init();
711 extern int spa_prop_set(spa_t *spa, nvlist_t *nvp);
712 extern int spa_prop_get(spa_t *spa, nvlist_t **nvp);
713 extern void spa_prop_clear_bootfs(spa_t *spa, uint64_t obj, dmu_tx_t *tx);
714 extern void spa_configfile_set(spa_t *, nvlist_t *, boolean_t);
716 /* asynchronous event notification */
717 extern void spa_event_notify(spa_t *spa, vdev_t *vdev, const char *name);
720 #define dprintf_bp(bp, fmt, ...) do { \
721 if (zfs_flags & ZFS_DEBUG_DPRINTF) { \
722 char *__blkbuf = kmem_alloc(BP_SPRINTF_LEN, KM_SLEEP); \
723 snprintf_blkptr(__blkbuf, BP_SPRINTF_LEN, (bp)); \
724 dprintf(fmt " %s\n", __VA_ARGS__, __blkbuf); \
725 kmem_free(__blkbuf, BP_SPRINTF_LEN); \
727 _NOTE(CONSTCOND) } while (0)
729 #define dprintf_bp(bp, fmt, ...)
732 extern boolean_t spa_debug_enabled(spa_t *spa);
733 #define spa_dbgmsg(spa, ...) \
735 if (spa_debug_enabled(spa)) \
736 zfs_dbgmsg(__VA_ARGS__); \
739 extern int spa_mode_global; /* mode, e.g. FREAD | FWRITE */
745 #endif /* _SYS_SPA_H */