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) 2011 by Delphix. All rights reserved.
30 #include <sys/zfs_context.h>
31 #include <sys/nvpair.h>
32 #include <sys/sysmacros.h>
33 #include <sys/types.h>
34 #include <sys/fs/zfs.h>
41 * Forward references that lots of things need.
43 typedef struct spa spa_t
;
44 typedef struct vdev vdev_t
;
45 typedef struct metaslab metaslab_t
;
46 typedef struct metaslab_group metaslab_group_t
;
47 typedef struct metaslab_class metaslab_class_t
;
48 typedef struct zio zio_t
;
49 typedef struct zilog zilog_t
;
50 typedef struct spa_aux_vdev spa_aux_vdev_t
;
51 typedef struct ddt ddt_t
;
52 typedef struct ddt_entry ddt_entry_t
;
56 * General-purpose 32-bit and 64-bit bitfield encodings.
58 #define BF32_DECODE(x, low, len) P2PHASE((x) >> (low), 1U << (len))
59 #define BF64_DECODE(x, low, len) P2PHASE((x) >> (low), 1ULL << (len))
60 #define BF32_ENCODE(x, low, len) (P2PHASE((x), 1U << (len)) << (low))
61 #define BF64_ENCODE(x, low, len) (P2PHASE((x), 1ULL << (len)) << (low))
63 #define BF32_GET(x, low, len) BF32_DECODE(x, low, len)
64 #define BF64_GET(x, low, len) BF64_DECODE(x, low, len)
66 #define BF32_SET(x, low, len, val) \
67 ((x) ^= BF32_ENCODE((x >> low) ^ (val), low, len))
68 #define BF64_SET(x, low, len, val) \
69 ((x) ^= BF64_ENCODE((x >> low) ^ (val), low, len))
71 #define BF32_GET_SB(x, low, len, shift, bias) \
72 ((BF32_GET(x, low, len) + (bias)) << (shift))
73 #define BF64_GET_SB(x, low, len, shift, bias) \
74 ((BF64_GET(x, low, len) + (bias)) << (shift))
76 #define BF32_SET_SB(x, low, len, shift, bias, val) \
77 BF32_SET(x, low, len, ((val) >> (shift)) - (bias))
78 #define BF64_SET_SB(x, low, len, shift, bias, val) \
79 BF64_SET(x, low, len, ((val) >> (shift)) - (bias))
82 * We currently support nine block sizes, from 512 bytes to 128K.
83 * We could go higher, but the benefits are near-zero and the cost
84 * of COWing a giant block to modify one byte would become excessive.
86 #define SPA_MINBLOCKSHIFT 9
87 #define SPA_MAXBLOCKSHIFT 17
88 #define SPA_MINBLOCKSIZE (1ULL << SPA_MINBLOCKSHIFT)
89 #define SPA_MAXBLOCKSIZE (1ULL << SPA_MAXBLOCKSHIFT)
91 #define SPA_BLOCKSIZES (SPA_MAXBLOCKSHIFT - SPA_MINBLOCKSHIFT + 1)
94 * Size of block to hold the configuration data (a packed nvlist)
96 #define SPA_CONFIG_BLOCKSIZE (1 << 14)
99 * The DVA size encodings for LSIZE and PSIZE support blocks up to 32MB.
100 * The ASIZE encoding should be at least 64 times larger (6 more bits)
101 * to support up to 4-way RAID-Z mirror mode with worst-case gang block
102 * overhead, three DVAs per bp, plus one more bit in case we do anything
103 * else that expands the ASIZE.
105 #define SPA_LSIZEBITS 16 /* LSIZE up to 32M (2^16 * 512) */
106 #define SPA_PSIZEBITS 16 /* PSIZE up to 32M (2^16 * 512) */
107 #define SPA_ASIZEBITS 24 /* ASIZE up to 64 times larger */
110 * All SPA data is represented by 128-bit data virtual addresses (DVAs).
111 * The members of the dva_t should be considered opaque outside the SPA.
114 uint64_t dva_word
[2];
118 * Each block has a 256-bit checksum -- strong enough for cryptographic hashes.
120 typedef struct zio_cksum
{
125 * Each block is described by its DVAs, time of birth, checksum, etc.
126 * The word-by-word, bit-by-bit layout of the blkptr is as follows:
128 * 64 56 48 40 32 24 16 8 0
129 * +-------+-------+-------+-------+-------+-------+-------+-------+
130 * 0 | vdev1 | GRID | ASIZE |
131 * +-------+-------+-------+-------+-------+-------+-------+-------+
133 * +-------+-------+-------+-------+-------+-------+-------+-------+
134 * 2 | vdev2 | GRID | ASIZE |
135 * +-------+-------+-------+-------+-------+-------+-------+-------+
137 * +-------+-------+-------+-------+-------+-------+-------+-------+
138 * 4 | vdev3 | GRID | ASIZE |
139 * +-------+-------+-------+-------+-------+-------+-------+-------+
141 * +-------+-------+-------+-------+-------+-------+-------+-------+
142 * 6 |BDX|lvl| type | cksum | comp | PSIZE | LSIZE |
143 * +-------+-------+-------+-------+-------+-------+-------+-------+
145 * +-------+-------+-------+-------+-------+-------+-------+-------+
147 * +-------+-------+-------+-------+-------+-------+-------+-------+
148 * 9 | physical birth txg |
149 * +-------+-------+-------+-------+-------+-------+-------+-------+
150 * a | logical birth txg |
151 * +-------+-------+-------+-------+-------+-------+-------+-------+
153 * +-------+-------+-------+-------+-------+-------+-------+-------+
155 * +-------+-------+-------+-------+-------+-------+-------+-------+
157 * +-------+-------+-------+-------+-------+-------+-------+-------+
159 * +-------+-------+-------+-------+-------+-------+-------+-------+
161 * +-------+-------+-------+-------+-------+-------+-------+-------+
165 * vdev virtual device ID
166 * offset offset into virtual device
168 * PSIZE physical size (after compression)
169 * ASIZE allocated size (including RAID-Z parity and gang block headers)
170 * GRID RAID-Z layout information (reserved for future use)
171 * cksum checksum function
172 * comp compression function
173 * G gang block indicator
174 * B byteorder (endianness)
177 * lvl level of indirection
178 * type DMU object type
179 * phys birth txg of block allocation; zero if same as logical birth txg
180 * log. birth transaction group in which the block was logically born
181 * fill count number of non-zero blocks under this bp
182 * checksum[4] 256-bit checksum of the data this bp describes
184 #define SPA_BLKPTRSHIFT 7 /* blkptr_t is 128 bytes */
185 #define SPA_DVAS_PER_BP 3 /* Number of DVAs in a bp */
187 typedef struct blkptr
{
188 dva_t blk_dva
[SPA_DVAS_PER_BP
]; /* Data Virtual Addresses */
189 uint64_t blk_prop
; /* size, compression, type, etc */
190 uint64_t blk_pad
[2]; /* Extra space for the future */
191 uint64_t blk_phys_birth
; /* txg when block was allocated */
192 uint64_t blk_birth
; /* transaction group at birth */
193 uint64_t blk_fill
; /* fill count */
194 zio_cksum_t blk_cksum
; /* 256-bit checksum */
198 * Macros to get and set fields in a bp or DVA.
200 #define DVA_GET_ASIZE(dva) \
201 BF64_GET_SB((dva)->dva_word[0], 0, 24, SPA_MINBLOCKSHIFT, 0)
202 #define DVA_SET_ASIZE(dva, x) \
203 BF64_SET_SB((dva)->dva_word[0], 0, 24, SPA_MINBLOCKSHIFT, 0, x)
205 #define DVA_GET_GRID(dva) BF64_GET((dva)->dva_word[0], 24, 8)
206 #define DVA_SET_GRID(dva, x) BF64_SET((dva)->dva_word[0], 24, 8, x)
208 #define DVA_GET_VDEV(dva) BF64_GET((dva)->dva_word[0], 32, 32)
209 #define DVA_SET_VDEV(dva, x) BF64_SET((dva)->dva_word[0], 32, 32, x)
211 #define DVA_GET_OFFSET(dva) \
212 BF64_GET_SB((dva)->dva_word[1], 0, 63, SPA_MINBLOCKSHIFT, 0)
213 #define DVA_SET_OFFSET(dva, x) \
214 BF64_SET_SB((dva)->dva_word[1], 0, 63, SPA_MINBLOCKSHIFT, 0, x)
216 #define DVA_GET_GANG(dva) BF64_GET((dva)->dva_word[1], 63, 1)
217 #define DVA_SET_GANG(dva, x) BF64_SET((dva)->dva_word[1], 63, 1, x)
219 #define BP_GET_LSIZE(bp) \
220 BF64_GET_SB((bp)->blk_prop, 0, 16, SPA_MINBLOCKSHIFT, 1)
221 #define BP_SET_LSIZE(bp, x) \
222 BF64_SET_SB((bp)->blk_prop, 0, 16, SPA_MINBLOCKSHIFT, 1, x)
224 #define BP_GET_PSIZE(bp) \
225 BF64_GET_SB((bp)->blk_prop, 16, 16, SPA_MINBLOCKSHIFT, 1)
226 #define BP_SET_PSIZE(bp, x) \
227 BF64_SET_SB((bp)->blk_prop, 16, 16, SPA_MINBLOCKSHIFT, 1, x)
229 #define BP_GET_COMPRESS(bp) BF64_GET((bp)->blk_prop, 32, 8)
230 #define BP_SET_COMPRESS(bp, x) BF64_SET((bp)->blk_prop, 32, 8, x)
232 #define BP_GET_CHECKSUM(bp) BF64_GET((bp)->blk_prop, 40, 8)
233 #define BP_SET_CHECKSUM(bp, x) BF64_SET((bp)->blk_prop, 40, 8, x)
235 #define BP_GET_TYPE(bp) BF64_GET((bp)->blk_prop, 48, 8)
236 #define BP_SET_TYPE(bp, x) BF64_SET((bp)->blk_prop, 48, 8, x)
238 #define BP_GET_LEVEL(bp) BF64_GET((bp)->blk_prop, 56, 5)
239 #define BP_SET_LEVEL(bp, x) BF64_SET((bp)->blk_prop, 56, 5, x)
241 #define BP_GET_PROP_BIT_61(bp) BF64_GET((bp)->blk_prop, 61, 1)
242 #define BP_SET_PROP_BIT_61(bp, x) BF64_SET((bp)->blk_prop, 61, 1, x)
244 #define BP_GET_DEDUP(bp) BF64_GET((bp)->blk_prop, 62, 1)
245 #define BP_SET_DEDUP(bp, x) BF64_SET((bp)->blk_prop, 62, 1, x)
247 #define BP_GET_BYTEORDER(bp) (0 - BF64_GET((bp)->blk_prop, 63, 1))
248 #define BP_SET_BYTEORDER(bp, x) BF64_SET((bp)->blk_prop, 63, 1, x)
250 #define BP_PHYSICAL_BIRTH(bp) \
251 ((bp)->blk_phys_birth ? (bp)->blk_phys_birth : (bp)->blk_birth)
253 #define BP_SET_BIRTH(bp, logical, physical) \
255 (bp)->blk_birth = (logical); \
256 (bp)->blk_phys_birth = ((logical) == (physical) ? 0 : (physical)); \
259 #define BP_GET_ASIZE(bp) \
260 (DVA_GET_ASIZE(&(bp)->blk_dva[0]) + DVA_GET_ASIZE(&(bp)->blk_dva[1]) + \
261 DVA_GET_ASIZE(&(bp)->blk_dva[2]))
263 #define BP_GET_UCSIZE(bp) \
264 ((BP_GET_LEVEL(bp) > 0 || dmu_ot[BP_GET_TYPE(bp)].ot_metadata) ? \
265 BP_GET_PSIZE(bp) : BP_GET_LSIZE(bp))
267 #define BP_GET_NDVAS(bp) \
268 (!!DVA_GET_ASIZE(&(bp)->blk_dva[0]) + \
269 !!DVA_GET_ASIZE(&(bp)->blk_dva[1]) + \
270 !!DVA_GET_ASIZE(&(bp)->blk_dva[2]))
272 #define BP_COUNT_GANG(bp) \
273 (DVA_GET_GANG(&(bp)->blk_dva[0]) + \
274 DVA_GET_GANG(&(bp)->blk_dva[1]) + \
275 DVA_GET_GANG(&(bp)->blk_dva[2]))
277 #define DVA_EQUAL(dva1, dva2) \
278 ((dva1)->dva_word[1] == (dva2)->dva_word[1] && \
279 (dva1)->dva_word[0] == (dva2)->dva_word[0])
281 #define BP_EQUAL(bp1, bp2) \
282 (BP_PHYSICAL_BIRTH(bp1) == BP_PHYSICAL_BIRTH(bp2) && \
283 DVA_EQUAL(&(bp1)->blk_dva[0], &(bp2)->blk_dva[0]) && \
284 DVA_EQUAL(&(bp1)->blk_dva[1], &(bp2)->blk_dva[1]) && \
285 DVA_EQUAL(&(bp1)->blk_dva[2], &(bp2)->blk_dva[2]))
287 #define ZIO_CHECKSUM_EQUAL(zc1, zc2) \
288 (0 == (((zc1).zc_word[0] - (zc2).zc_word[0]) | \
289 ((zc1).zc_word[1] - (zc2).zc_word[1]) | \
290 ((zc1).zc_word[2] - (zc2).zc_word[2]) | \
291 ((zc1).zc_word[3] - (zc2).zc_word[3])))
293 #define DVA_IS_VALID(dva) (DVA_GET_ASIZE(dva) != 0)
295 #define ZIO_SET_CHECKSUM(zcp, w0, w1, w2, w3) \
297 (zcp)->zc_word[0] = w0; \
298 (zcp)->zc_word[1] = w1; \
299 (zcp)->zc_word[2] = w2; \
300 (zcp)->zc_word[3] = w3; \
303 #define BP_IDENTITY(bp) (&(bp)->blk_dva[0])
304 #define BP_IS_GANG(bp) DVA_GET_GANG(BP_IDENTITY(bp))
305 #define BP_IS_HOLE(bp) ((bp)->blk_birth == 0)
307 /* BP_IS_RAIDZ(bp) assumes no block compression */
308 #define BP_IS_RAIDZ(bp) (DVA_GET_ASIZE(&(bp)->blk_dva[0]) > \
311 #define BP_ZERO(bp) \
313 (bp)->blk_dva[0].dva_word[0] = 0; \
314 (bp)->blk_dva[0].dva_word[1] = 0; \
315 (bp)->blk_dva[1].dva_word[0] = 0; \
316 (bp)->blk_dva[1].dva_word[1] = 0; \
317 (bp)->blk_dva[2].dva_word[0] = 0; \
318 (bp)->blk_dva[2].dva_word[1] = 0; \
319 (bp)->blk_prop = 0; \
320 (bp)->blk_pad[0] = 0; \
321 (bp)->blk_pad[1] = 0; \
322 (bp)->blk_phys_birth = 0; \
323 (bp)->blk_birth = 0; \
324 (bp)->blk_fill = 0; \
325 ZIO_SET_CHECKSUM(&(bp)->blk_cksum, 0, 0, 0, 0); \
329 * Note: the byteorder is either 0 or -1, both of which are palindromes.
330 * This simplifies the endianness handling a bit.
333 #define ZFS_HOST_BYTEORDER (0ULL)
335 #define ZFS_HOST_BYTEORDER (-1ULL)
338 #define BP_SHOULD_BYTESWAP(bp) (BP_GET_BYTEORDER(bp) != ZFS_HOST_BYTEORDER)
340 #define BP_SPRINTF_LEN 320
343 * This macro allows code sharing between zfs, libzpool, and mdb.
344 * 'func' is either snprintf() or mdb_snprintf().
345 * 'ws' (whitespace) can be ' ' for single-line format, '\n' for multi-line.
347 #define SPRINTF_BLKPTR(func, ws, buf, bp, type, checksum, compress) \
349 static const char *copyname[] = \
350 { "zero", "single", "double", "triple" }; \
351 int size = BP_SPRINTF_LEN; \
357 len = func(buf + len, size - len, "<NULL>"); \
358 } else if (BP_IS_HOLE(bp)) { \
359 len = func(buf + len, size - len, "<hole>"); \
361 for (d = 0; d < BP_GET_NDVAS(bp); d++) { \
362 const dva_t *dva = &bp->blk_dva[d]; \
363 if (DVA_IS_VALID(dva)) \
365 len += func(buf + len, size - len, \
366 "DVA[%d]=<%llu:%llx:%llx>%c", d, \
367 (u_longlong_t)DVA_GET_VDEV(dva), \
368 (u_longlong_t)DVA_GET_OFFSET(dva), \
369 (u_longlong_t)DVA_GET_ASIZE(dva), \
372 if (BP_IS_GANG(bp) && \
373 DVA_GET_ASIZE(&bp->blk_dva[2]) <= \
374 DVA_GET_ASIZE(&bp->blk_dva[1]) / 2) \
376 len += func(buf + len, size - len, \
377 "[L%llu %s] %s %s %s %s %s %s%c" \
378 "size=%llxL/%llxP birth=%lluL/%lluP fill=%llu%c" \
379 "cksum=%llx:%llx:%llx:%llx", \
380 (u_longlong_t)BP_GET_LEVEL(bp), \
384 BP_GET_BYTEORDER(bp) == 0 ? "BE" : "LE", \
385 BP_IS_GANG(bp) ? "gang" : "contiguous", \
386 BP_GET_DEDUP(bp) ? "dedup" : "unique", \
389 (u_longlong_t)BP_GET_LSIZE(bp), \
390 (u_longlong_t)BP_GET_PSIZE(bp), \
391 (u_longlong_t)bp->blk_birth, \
392 (u_longlong_t)BP_PHYSICAL_BIRTH(bp), \
393 (u_longlong_t)bp->blk_fill, \
395 (u_longlong_t)bp->blk_cksum.zc_word[0], \
396 (u_longlong_t)bp->blk_cksum.zc_word[1], \
397 (u_longlong_t)bp->blk_cksum.zc_word[2], \
398 (u_longlong_t)bp->blk_cksum.zc_word[3]); \
400 ASSERT(len < size); \
405 #define BP_GET_BUFC_TYPE(bp) \
406 (((BP_GET_LEVEL(bp) > 0) || (dmu_ot[BP_GET_TYPE(bp)].ot_metadata)) ? \
407 ARC_BUFC_METADATA : ARC_BUFC_DATA);
409 typedef enum spa_import_type
{
414 /* state manipulation functions */
415 extern int spa_open(const char *pool
, spa_t
**, void *tag
);
416 extern int spa_open_rewind(const char *pool
, spa_t
**, void *tag
,
417 nvlist_t
*policy
, nvlist_t
**config
);
418 extern int spa_get_stats(const char *pool
, nvlist_t
**config
,
419 char *altroot
, size_t buflen
);
420 extern int spa_create(const char *pool
, nvlist_t
*config
, nvlist_t
*props
,
421 const char *history_str
, nvlist_t
*zplprops
);
422 extern int spa_import_rootpool(char *devpath
, char *devid
);
423 extern int spa_import(const char *pool
, nvlist_t
*config
, nvlist_t
*props
,
425 extern nvlist_t
*spa_tryimport(nvlist_t
*tryconfig
);
426 extern int spa_destroy(char *pool
);
427 extern int spa_export(char *pool
, nvlist_t
**oldconfig
, boolean_t force
,
428 boolean_t hardforce
);
429 extern int spa_reset(char *pool
);
430 extern void spa_async_request(spa_t
*spa
, int flag
);
431 extern void spa_async_unrequest(spa_t
*spa
, int flag
);
432 extern void spa_async_suspend(spa_t
*spa
);
433 extern void spa_async_resume(spa_t
*spa
);
434 extern spa_t
*spa_inject_addref(char *pool
);
435 extern void spa_inject_delref(spa_t
*spa
);
436 extern void spa_scan_stat_init(spa_t
*spa
);
437 extern int spa_scan_get_stats(spa_t
*spa
, pool_scan_stat_t
*ps
);
439 #define SPA_ASYNC_CONFIG_UPDATE 0x01
440 #define SPA_ASYNC_REMOVE 0x02
441 #define SPA_ASYNC_PROBE 0x04
442 #define SPA_ASYNC_RESILVER_DONE 0x08
443 #define SPA_ASYNC_RESILVER 0x10
444 #define SPA_ASYNC_AUTOEXPAND 0x20
445 #define SPA_ASYNC_REMOVE_DONE 0x40
446 #define SPA_ASYNC_REMOVE_STOP 0x80
449 * Controls the behavior of spa_vdev_remove().
451 #define SPA_REMOVE_UNSPARE 0x01
452 #define SPA_REMOVE_DONE 0x02
454 /* device manipulation */
455 extern int spa_vdev_add(spa_t
*spa
, nvlist_t
*nvroot
);
456 extern int spa_vdev_attach(spa_t
*spa
, uint64_t guid
, nvlist_t
*nvroot
,
458 extern int spa_vdev_detach(spa_t
*spa
, uint64_t guid
, uint64_t pguid
,
460 extern int spa_vdev_remove(spa_t
*spa
, uint64_t guid
, boolean_t unspare
);
461 extern boolean_t
spa_vdev_remove_active(spa_t
*spa
);
462 extern int spa_vdev_setpath(spa_t
*spa
, uint64_t guid
, const char *newpath
);
463 extern int spa_vdev_setfru(spa_t
*spa
, uint64_t guid
, const char *newfru
);
464 extern int spa_vdev_split_mirror(spa_t
*spa
, char *newname
, nvlist_t
*config
,
465 nvlist_t
*props
, boolean_t exp
);
467 /* spare state (which is global across all pools) */
468 extern void spa_spare_add(vdev_t
*vd
);
469 extern void spa_spare_remove(vdev_t
*vd
);
470 extern boolean_t
spa_spare_exists(uint64_t guid
, uint64_t *pool
, int *refcnt
);
471 extern void spa_spare_activate(vdev_t
*vd
);
473 /* L2ARC state (which is global across all pools) */
474 extern void spa_l2cache_add(vdev_t
*vd
);
475 extern void spa_l2cache_remove(vdev_t
*vd
);
476 extern boolean_t
spa_l2cache_exists(uint64_t guid
, uint64_t *pool
);
477 extern void spa_l2cache_activate(vdev_t
*vd
);
478 extern void spa_l2cache_drop(spa_t
*spa
);
481 extern int spa_scan(spa_t
*spa
, pool_scan_func_t func
);
482 extern int spa_scan_stop(spa_t
*spa
);
485 extern void spa_sync(spa_t
*spa
, uint64_t txg
); /* only for DMU use */
486 extern void spa_sync_allpools(void);
489 * DEFERRED_FREE must be large enough that regular blocks are not
490 * deferred. XXX so can't we change it back to 1?
492 #define SYNC_PASS_DEFERRED_FREE 2 /* defer frees after this pass */
493 #define SYNC_PASS_DONT_COMPRESS 4 /* don't compress after this pass */
494 #define SYNC_PASS_REWRITE 1 /* rewrite new bps after this pass */
496 /* spa namespace global mutex */
497 extern kmutex_t spa_namespace_lock
;
500 * SPA configuration functions in spa_config.c
503 #define SPA_CONFIG_UPDATE_POOL 0
504 #define SPA_CONFIG_UPDATE_VDEVS 1
506 extern void spa_config_sync(spa_t
*, boolean_t
, boolean_t
);
507 extern void spa_config_load(void);
508 extern nvlist_t
*spa_all_configs(uint64_t *);
509 extern void spa_config_set(spa_t
*spa
, nvlist_t
*config
);
510 extern nvlist_t
*spa_config_generate(spa_t
*spa
, vdev_t
*vd
, uint64_t txg
,
512 extern void spa_config_update(spa_t
*spa
, int what
);
515 * Miscellaneous SPA routines in spa_misc.c
518 /* Namespace manipulation */
519 extern spa_t
*spa_lookup(const char *name
);
520 extern spa_t
*spa_add(const char *name
, nvlist_t
*config
, const char *altroot
);
521 extern void spa_remove(spa_t
*spa
);
522 extern spa_t
*spa_next(spa_t
*prev
);
524 /* Refcount functions */
525 extern void spa_open_ref(spa_t
*spa
, void *tag
);
526 extern void spa_close(spa_t
*spa
, void *tag
);
527 extern boolean_t
spa_refcount_zero(spa_t
*spa
);
529 #define SCL_NONE 0x00
530 #define SCL_CONFIG 0x01
531 #define SCL_STATE 0x02
532 #define SCL_L2ARC 0x04 /* hack until L2ARC 2.0 */
533 #define SCL_ALLOC 0x08
535 #define SCL_FREE 0x20
536 #define SCL_VDEV 0x40
538 #define SCL_ALL ((1 << SCL_LOCKS) - 1)
539 #define SCL_STATE_ALL (SCL_STATE | SCL_L2ARC | SCL_ZIO)
541 /* Pool configuration locks */
542 extern int spa_config_tryenter(spa_t
*spa
, int locks
, void *tag
, krw_t rw
);
543 extern void spa_config_enter(spa_t
*spa
, int locks
, void *tag
, krw_t rw
);
544 extern void spa_config_exit(spa_t
*spa
, int locks
, void *tag
);
545 extern int spa_config_held(spa_t
*spa
, int locks
, krw_t rw
);
547 /* Pool vdev add/remove lock */
548 extern uint64_t spa_vdev_enter(spa_t
*spa
);
549 extern uint64_t spa_vdev_config_enter(spa_t
*spa
);
550 extern void spa_vdev_config_exit(spa_t
*spa
, vdev_t
*vd
, uint64_t txg
,
551 int error
, char *tag
);
552 extern int spa_vdev_exit(spa_t
*spa
, vdev_t
*vd
, uint64_t txg
, int error
);
554 /* Pool vdev state change lock */
555 extern void spa_vdev_state_enter(spa_t
*spa
, int oplock
);
556 extern int spa_vdev_state_exit(spa_t
*spa
, vdev_t
*vd
, int error
);
559 typedef enum spa_log_state
{
560 SPA_LOG_UNKNOWN
= 0, /* unknown log state */
561 SPA_LOG_MISSING
, /* missing log(s) */
562 SPA_LOG_CLEAR
, /* clear the log(s) */
563 SPA_LOG_GOOD
, /* log(s) are good */
566 extern spa_log_state_t
spa_get_log_state(spa_t
*spa
);
567 extern void spa_set_log_state(spa_t
*spa
, spa_log_state_t state
);
568 extern int spa_offline_log(spa_t
*spa
);
570 /* Log claim callback */
571 extern void spa_claim_notify(zio_t
*zio
);
573 /* Accessor functions */
574 extern boolean_t
spa_shutting_down(spa_t
*spa
);
575 extern struct dsl_pool
*spa_get_dsl(spa_t
*spa
);
576 extern blkptr_t
*spa_get_rootblkptr(spa_t
*spa
);
577 extern void spa_set_rootblkptr(spa_t
*spa
, const blkptr_t
*bp
);
578 extern void spa_altroot(spa_t
*, char *, size_t);
579 extern int spa_sync_pass(spa_t
*spa
);
580 extern char *spa_name(spa_t
*spa
);
581 extern uint64_t spa_guid(spa_t
*spa
);
582 extern uint64_t spa_last_synced_txg(spa_t
*spa
);
583 extern uint64_t spa_first_txg(spa_t
*spa
);
584 extern uint64_t spa_syncing_txg(spa_t
*spa
);
585 extern uint64_t spa_version(spa_t
*spa
);
586 extern pool_state_t
spa_state(spa_t
*spa
);
587 extern spa_load_state_t
spa_load_state(spa_t
*spa
);
588 extern uint64_t spa_freeze_txg(spa_t
*spa
);
589 extern uint64_t spa_get_asize(spa_t
*spa
, uint64_t lsize
);
590 extern uint64_t spa_get_dspace(spa_t
*spa
);
591 extern void spa_update_dspace(spa_t
*spa
);
592 extern uint64_t spa_version(spa_t
*spa
);
593 extern boolean_t
spa_deflate(spa_t
*spa
);
594 extern metaslab_class_t
*spa_normal_class(spa_t
*spa
);
595 extern metaslab_class_t
*spa_log_class(spa_t
*spa
);
596 extern int spa_max_replication(spa_t
*spa
);
597 extern int spa_prev_software_version(spa_t
*spa
);
598 extern int spa_busy(void);
599 extern uint8_t spa_get_failmode(spa_t
*spa
);
600 extern boolean_t
spa_suspended(spa_t
*spa
);
601 extern uint64_t spa_bootfs(spa_t
*spa
);
602 extern uint64_t spa_delegation(spa_t
*spa
);
603 extern objset_t
*spa_meta_objset(spa_t
*spa
);
605 /* Miscellaneous support routines */
606 extern int spa_rename(const char *oldname
, const char *newname
);
607 extern spa_t
*spa_by_guid(uint64_t pool_guid
, uint64_t device_guid
);
608 extern boolean_t
spa_guid_exists(uint64_t pool_guid
, uint64_t device_guid
);
609 extern char *spa_strdup(const char *);
610 extern void spa_strfree(char *);
611 extern uint64_t spa_get_random(uint64_t range
);
612 extern uint64_t spa_generate_guid(spa_t
*spa
);
613 extern void sprintf_blkptr(char *buf
, const blkptr_t
*bp
);
614 extern void spa_freeze(spa_t
*spa
);
615 extern void spa_upgrade(spa_t
*spa
, uint64_t version
);
616 extern void spa_evict_all(void);
617 extern vdev_t
*spa_lookup_by_guid(spa_t
*spa
, uint64_t guid
,
619 extern boolean_t
spa_has_spare(spa_t
*, uint64_t guid
);
620 extern uint64_t dva_get_dsize_sync(spa_t
*spa
, const dva_t
*dva
);
621 extern uint64_t bp_get_dsize_sync(spa_t
*spa
, const blkptr_t
*bp
);
622 extern uint64_t bp_get_dsize(spa_t
*spa
, const blkptr_t
*bp
);
623 extern boolean_t
spa_has_slogs(spa_t
*spa
);
624 extern boolean_t
spa_is_root(spa_t
*spa
);
625 extern boolean_t
spa_writeable(spa_t
*spa
);
627 extern int spa_mode(spa_t
*spa
);
628 extern uint64_t strtonum(const char *str
, char **nptr
);
630 /* history logging */
631 typedef enum history_log_type
{
635 } history_log_type_t
;
637 typedef struct history_arg
{
638 char *ha_history_str
;
639 history_log_type_t ha_log_type
;
640 history_internal_events_t ha_event
;
645 extern char *spa_his_ievent_table
[];
647 extern void spa_history_create_obj(spa_t
*spa
, dmu_tx_t
*tx
);
648 extern int spa_history_get(spa_t
*spa
, uint64_t *offset
, uint64_t *len_read
,
650 extern int spa_history_log(spa_t
*spa
, const char *his_buf
,
651 history_log_type_t what
);
652 extern void spa_history_log_internal(history_internal_events_t event
,
653 spa_t
*spa
, dmu_tx_t
*tx
, const char *fmt
, ...);
654 extern void spa_history_log_version(spa_t
*spa
, history_internal_events_t evt
);
658 extern void spa_log_error(spa_t
*spa
, zio_t
*zio
);
659 extern void zfs_ereport_post(const char *class, spa_t
*spa
, vdev_t
*vd
,
660 zio_t
*zio
, uint64_t stateoroffset
, uint64_t length
);
661 extern void zfs_post_remove(spa_t
*spa
, vdev_t
*vd
);
662 extern void zfs_post_state_change(spa_t
*spa
, vdev_t
*vd
);
663 extern void zfs_post_autoreplace(spa_t
*spa
, vdev_t
*vd
);
664 extern uint64_t spa_get_errlog_size(spa_t
*spa
);
665 extern int spa_get_errlog(spa_t
*spa
, void *uaddr
, size_t *count
);
666 extern void spa_errlog_rotate(spa_t
*spa
);
667 extern void spa_errlog_drain(spa_t
*spa
);
668 extern void spa_errlog_sync(spa_t
*spa
, uint64_t txg
);
669 extern void spa_get_errlists(spa_t
*spa
, avl_tree_t
*last
, avl_tree_t
*scrub
);
672 extern void vdev_cache_stat_init(void);
673 extern void vdev_cache_stat_fini(void);
675 /* Initialization and termination */
676 extern void spa_init(int flags
);
677 extern void spa_fini(void);
678 extern void spa_boot_init(void);
681 extern int spa_prop_set(spa_t
*spa
, nvlist_t
*nvp
);
682 extern int spa_prop_get(spa_t
*spa
, nvlist_t
**nvp
);
683 extern void spa_prop_clear_bootfs(spa_t
*spa
, uint64_t obj
, dmu_tx_t
*tx
);
684 extern void spa_configfile_set(spa_t
*, nvlist_t
*, boolean_t
);
686 /* asynchronous event notification */
687 extern void spa_event_notify(spa_t
*spa
, vdev_t
*vdev
, const char *name
);
690 #define dprintf_bp(bp, fmt, ...) do { \
691 if (zfs_flags & ZFS_DEBUG_DPRINTF) { \
692 char *__blkbuf = kmem_alloc(BP_SPRINTF_LEN, KM_SLEEP); \
693 sprintf_blkptr(__blkbuf, (bp)); \
694 dprintf(fmt " %s\n", __VA_ARGS__, __blkbuf); \
695 kmem_free(__blkbuf, BP_SPRINTF_LEN); \
697 _NOTE(CONSTCOND) } while (0)
699 #define dprintf_bp(bp, fmt, ...)
702 extern boolean_t
spa_debug_enabled(spa_t
*spa
);
703 #define spa_dbgmsg(spa, ...) \
705 if (spa_debug_enabled(spa)) \
706 zfs_dbgmsg(__VA_ARGS__); \
709 extern int spa_mode_global
; /* mode, e.g. FREAD | FWRITE */
715 #endif /* _SYS_SPA_H */