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 2008 Sun Microsystems, Inc. All rights reserved.
23 * Use is subject to license terms.
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 zilog zilog_t;
47 typedef struct traverse_handle traverse_handle_t;
48 typedef struct spa_aux_vdev spa_aux_vdev_t;
52 * General-purpose 32-bit and 64-bit bitfield encodings.
54 #define BF32_DECODE(x, low, len) P2PHASE((x) >> (low), 1U << (len))
55 #define BF64_DECODE(x, low, len) P2PHASE((x) >> (low), 1ULL << (len))
56 #define BF32_ENCODE(x, low, len) (P2PHASE((x), 1U << (len)) << (low))
57 #define BF64_ENCODE(x, low, len) (P2PHASE((x), 1ULL << (len)) << (low))
59 #define BF32_GET(x, low, len) BF32_DECODE(x, low, len)
60 #define BF64_GET(x, low, len) BF64_DECODE(x, low, len)
62 #define BF32_SET(x, low, len, val) \
63 ((x) ^= BF32_ENCODE((x >> low) ^ (val), low, len))
64 #define BF64_SET(x, low, len, val) \
65 ((x) ^= BF64_ENCODE((x >> low) ^ (val), low, len))
67 #define BF32_GET_SB(x, low, len, shift, bias) \
68 ((BF32_GET(x, low, len) + (bias)) << (shift))
69 #define BF64_GET_SB(x, low, len, shift, bias) \
70 ((BF64_GET(x, low, len) + (bias)) << (shift))
72 #define BF32_SET_SB(x, low, len, shift, bias, val) \
73 BF32_SET(x, low, len, ((val) >> (shift)) - (bias))
74 #define BF64_SET_SB(x, low, len, shift, bias, val) \
75 BF64_SET(x, low, len, ((val) >> (shift)) - (bias))
78 * We currently support nine block sizes, from 512 bytes to 128K.
79 * We could go higher, but the benefits are near-zero and the cost
80 * of COWing a giant block to modify one byte would become excessive.
82 #define SPA_MINBLOCKSHIFT 9
83 #define SPA_MAXBLOCKSHIFT 17
84 #define SPA_MINBLOCKSIZE (1ULL << SPA_MINBLOCKSHIFT)
85 #define SPA_MAXBLOCKSIZE (1ULL << SPA_MAXBLOCKSHIFT)
87 #define SPA_BLOCKSIZES (SPA_MAXBLOCKSHIFT - SPA_MINBLOCKSHIFT + 1)
90 * Size of block to hold the configuration data (a packed nvlist)
92 #define SPA_CONFIG_BLOCKSIZE (1 << 14)
95 * The DVA size encodings for LSIZE and PSIZE support blocks up to 32MB.
96 * The ASIZE encoding should be at least 64 times larger (6 more bits)
97 * to support up to 4-way RAID-Z mirror mode with worst-case gang block
98 * overhead, three DVAs per bp, plus one more bit in case we do anything
99 * else that expands the ASIZE.
101 #define SPA_LSIZEBITS 16 /* LSIZE up to 32M (2^16 * 512) */
102 #define SPA_PSIZEBITS 16 /* PSIZE up to 32M (2^16 * 512) */
103 #define SPA_ASIZEBITS 24 /* ASIZE up to 64 times larger */
106 * All SPA data is represented by 128-bit data virtual addresses (DVAs).
107 * The members of the dva_t should be considered opaque outside the SPA.
110 uint64_t dva_word[2];
114 * Each block has a 256-bit checksum -- strong enough for cryptographic hashes.
116 typedef struct zio_cksum {
121 * Each block is described by its DVAs, time of birth, checksum, etc.
122 * The word-by-word, bit-by-bit layout of the blkptr is as follows:
124 * 64 56 48 40 32 24 16 8 0
125 * +-------+-------+-------+-------+-------+-------+-------+-------+
126 * 0 | vdev1 | GRID | ASIZE |
127 * +-------+-------+-------+-------+-------+-------+-------+-------+
129 * +-------+-------+-------+-------+-------+-------+-------+-------+
130 * 2 | vdev2 | GRID | ASIZE |
131 * +-------+-------+-------+-------+-------+-------+-------+-------+
133 * +-------+-------+-------+-------+-------+-------+-------+-------+
134 * 4 | vdev3 | GRID | ASIZE |
135 * +-------+-------+-------+-------+-------+-------+-------+-------+
137 * +-------+-------+-------+-------+-------+-------+-------+-------+
138 * 6 |E| lvl | type | cksum | comp | PSIZE | LSIZE |
139 * +-------+-------+-------+-------+-------+-------+-------+-------+
141 * +-------+-------+-------+-------+-------+-------+-------+-------+
143 * +-------+-------+-------+-------+-------+-------+-------+-------+
145 * +-------+-------+-------+-------+-------+-------+-------+-------+
147 * +-------+-------+-------+-------+-------+-------+-------+-------+
149 * +-------+-------+-------+-------+-------+-------+-------+-------+
151 * +-------+-------+-------+-------+-------+-------+-------+-------+
153 * +-------+-------+-------+-------+-------+-------+-------+-------+
155 * +-------+-------+-------+-------+-------+-------+-------+-------+
157 * +-------+-------+-------+-------+-------+-------+-------+-------+
161 * vdev virtual device ID
162 * offset offset into virtual device
164 * PSIZE physical size (after compression)
165 * ASIZE allocated size (including RAID-Z parity and gang block headers)
166 * GRID RAID-Z layout information (reserved for future use)
167 * cksum checksum function
168 * comp compression function
169 * G gang block indicator
171 * type DMU object type
172 * lvl level of indirection
173 * birth txg transaction group in which the block was born
174 * fill count number of non-zero blocks under this bp
175 * checksum[4] 256-bit checksum of the data this bp describes
177 typedef struct blkptr {
178 dva_t blk_dva[3]; /* 128-bit Data Virtual Address */
179 uint64_t blk_prop; /* size, compression, type, etc */
180 uint64_t blk_pad[3]; /* Extra space for the future */
181 uint64_t blk_birth; /* transaction group at birth */
182 uint64_t blk_fill; /* fill count */
183 zio_cksum_t blk_cksum; /* 256-bit checksum */
186 #define SPA_BLKPTRSHIFT 7 /* blkptr_t is 128 bytes */
187 #define SPA_DVAS_PER_BP 3 /* Number of DVAs in a bp */
190 * Macros to get and set fields in a bp or DVA.
192 #define DVA_GET_ASIZE(dva) \
193 BF64_GET_SB((dva)->dva_word[0], 0, 24, SPA_MINBLOCKSHIFT, 0)
194 #define DVA_SET_ASIZE(dva, x) \
195 BF64_SET_SB((dva)->dva_word[0], 0, 24, SPA_MINBLOCKSHIFT, 0, x)
197 #define DVA_GET_GRID(dva) BF64_GET((dva)->dva_word[0], 24, 8)
198 #define DVA_SET_GRID(dva, x) BF64_SET((dva)->dva_word[0], 24, 8, x)
200 #define DVA_GET_VDEV(dva) BF64_GET((dva)->dva_word[0], 32, 32)
201 #define DVA_SET_VDEV(dva, x) BF64_SET((dva)->dva_word[0], 32, 32, x)
203 #define DVA_GET_OFFSET(dva) \
204 BF64_GET_SB((dva)->dva_word[1], 0, 63, SPA_MINBLOCKSHIFT, 0)
205 #define DVA_SET_OFFSET(dva, x) \
206 BF64_SET_SB((dva)->dva_word[1], 0, 63, SPA_MINBLOCKSHIFT, 0, x)
208 #define DVA_GET_GANG(dva) BF64_GET((dva)->dva_word[1], 63, 1)
209 #define DVA_SET_GANG(dva, x) BF64_SET((dva)->dva_word[1], 63, 1, x)
211 #define BP_GET_LSIZE(bp) \
212 (BP_IS_HOLE(bp) ? 0 : \
213 BF64_GET_SB((bp)->blk_prop, 0, 16, SPA_MINBLOCKSHIFT, 1))
214 #define BP_SET_LSIZE(bp, x) \
215 BF64_SET_SB((bp)->blk_prop, 0, 16, SPA_MINBLOCKSHIFT, 1, x)
217 #define BP_GET_PSIZE(bp) \
218 BF64_GET_SB((bp)->blk_prop, 16, 16, SPA_MINBLOCKSHIFT, 1)
219 #define BP_SET_PSIZE(bp, x) \
220 BF64_SET_SB((bp)->blk_prop, 16, 16, SPA_MINBLOCKSHIFT, 1, x)
222 #define BP_GET_COMPRESS(bp) BF64_GET((bp)->blk_prop, 32, 8)
223 #define BP_SET_COMPRESS(bp, x) BF64_SET((bp)->blk_prop, 32, 8, x)
225 #define BP_GET_CHECKSUM(bp) BF64_GET((bp)->blk_prop, 40, 8)
226 #define BP_SET_CHECKSUM(bp, x) BF64_SET((bp)->blk_prop, 40, 8, x)
228 #define BP_GET_TYPE(bp) BF64_GET((bp)->blk_prop, 48, 8)
229 #define BP_SET_TYPE(bp, x) BF64_SET((bp)->blk_prop, 48, 8, x)
231 #define BP_GET_LEVEL(bp) BF64_GET((bp)->blk_prop, 56, 5)
232 #define BP_SET_LEVEL(bp, x) BF64_SET((bp)->blk_prop, 56, 5, x)
234 #define BP_GET_BYTEORDER(bp) (0 - BF64_GET((bp)->blk_prop, 63, 1))
235 #define BP_SET_BYTEORDER(bp, x) BF64_SET((bp)->blk_prop, 63, 1, x)
237 #define BP_GET_ASIZE(bp) \
238 (DVA_GET_ASIZE(&(bp)->blk_dva[0]) + DVA_GET_ASIZE(&(bp)->blk_dva[1]) + \
239 DVA_GET_ASIZE(&(bp)->blk_dva[2]))
241 #define BP_GET_UCSIZE(bp) \
242 ((BP_GET_LEVEL(bp) > 0 || dmu_ot[BP_GET_TYPE(bp)].ot_metadata) ? \
243 BP_GET_PSIZE(bp) : BP_GET_LSIZE(bp));
245 #define BP_GET_NDVAS(bp) \
246 (!!DVA_GET_ASIZE(&(bp)->blk_dva[0]) + \
247 !!DVA_GET_ASIZE(&(bp)->blk_dva[1]) + \
248 !!DVA_GET_ASIZE(&(bp)->blk_dva[2]))
250 #define BP_COUNT_GANG(bp) \
251 (DVA_GET_GANG(&(bp)->blk_dva[0]) + \
252 DVA_GET_GANG(&(bp)->blk_dva[1]) + \
253 DVA_GET_GANG(&(bp)->blk_dva[2]))
255 #define DVA_EQUAL(dva1, dva2) \
256 ((dva1)->dva_word[1] == (dva2)->dva_word[1] && \
257 (dva1)->dva_word[0] == (dva2)->dva_word[0])
259 #define ZIO_CHECKSUM_EQUAL(zc1, zc2) \
260 (0 == (((zc1).zc_word[0] - (zc2).zc_word[0]) | \
261 ((zc1).zc_word[1] - (zc2).zc_word[1]) | \
262 ((zc1).zc_word[2] - (zc2).zc_word[2]) | \
263 ((zc1).zc_word[3] - (zc2).zc_word[3])))
265 #define DVA_IS_VALID(dva) (DVA_GET_ASIZE(dva) != 0)
267 #define ZIO_SET_CHECKSUM(zcp, w0, w1, w2, w3) \
269 (zcp)->zc_word[0] = w0; \
270 (zcp)->zc_word[1] = w1; \
271 (zcp)->zc_word[2] = w2; \
272 (zcp)->zc_word[3] = w3; \
275 #define BP_IDENTITY(bp) (&(bp)->blk_dva[0])
276 #define BP_IS_GANG(bp) DVA_GET_GANG(BP_IDENTITY(bp))
277 #define BP_IS_HOLE(bp) ((bp)->blk_birth == 0)
278 #define BP_IS_OLDER(bp, txg) (!BP_IS_HOLE(bp) && (bp)->blk_birth < (txg))
280 #define BP_ZERO(bp) \
282 (bp)->blk_dva[0].dva_word[0] = 0; \
283 (bp)->blk_dva[0].dva_word[1] = 0; \
284 (bp)->blk_dva[1].dva_word[0] = 0; \
285 (bp)->blk_dva[1].dva_word[1] = 0; \
286 (bp)->blk_dva[2].dva_word[0] = 0; \
287 (bp)->blk_dva[2].dva_word[1] = 0; \
288 (bp)->blk_prop = 0; \
289 (bp)->blk_pad[0] = 0; \
290 (bp)->blk_pad[1] = 0; \
291 (bp)->blk_pad[2] = 0; \
292 (bp)->blk_birth = 0; \
293 (bp)->blk_fill = 0; \
294 ZIO_SET_CHECKSUM(&(bp)->blk_cksum, 0, 0, 0, 0); \
297 #define BLK_FILL_ALREADY_FREED (-1ULL)
300 * Note: the byteorder is either 0 or -1, both of which are palindromes.
301 * This simplifies the endianness handling a bit.
303 #if BYTE_ORDER == _BIG_ENDIAN
304 #define ZFS_HOST_BYTEORDER (0ULL)
306 #define ZFS_HOST_BYTEORDER (-1ULL)
309 #define BP_SHOULD_BYTESWAP(bp) (BP_GET_BYTEORDER(bp) != ZFS_HOST_BYTEORDER)
311 #define BP_SPRINTF_LEN 320
315 #define BP_GET_BUFC_TYPE(bp) \
316 (((BP_GET_LEVEL(bp) > 0) || (dmu_ot[BP_GET_TYPE(bp)].ot_metadata)) ? \
317 ARC_BUFC_METADATA : ARC_BUFC_DATA);
319 * Routines found in spa.c
322 /* state manipulation functions */
323 extern int spa_open(const char *pool, spa_t **, void *tag);
324 extern int spa_get_stats(const char *pool, nvlist_t **config,
325 char *altroot, size_t buflen);
326 extern int spa_create(const char *pool, nvlist_t *config, nvlist_t *props,
327 const char *history_str, nvlist_t *zplprops);
328 extern int spa_check_rootconf(char *devpath, char *devid,
329 nvlist_t **bestconf, uint64_t *besttxg);
330 extern boolean_t spa_rootdev_validate(nvlist_t *nv);
331 extern int spa_import_rootpool(char *devpath, char *devid);
332 extern int spa_import(const char *pool, nvlist_t *config, nvlist_t *props);
333 extern int spa_import_faulted(const char *, nvlist_t *, nvlist_t *);
334 extern nvlist_t *spa_tryimport(nvlist_t *tryconfig);
335 extern int spa_destroy(char *pool);
336 extern int spa_export(char *pool, nvlist_t **oldconfig, boolean_t force);
337 extern int spa_reset(char *pool);
338 extern void spa_async_request(spa_t *spa, int flag);
339 extern void spa_async_unrequest(spa_t *spa, int flag);
340 extern void spa_async_suspend(spa_t *spa);
341 extern void spa_async_resume(spa_t *spa);
342 extern spa_t *spa_inject_addref(char *pool);
343 extern void spa_inject_delref(spa_t *spa);
345 #define SPA_ASYNC_CONFIG_UPDATE 0x01
346 #define SPA_ASYNC_REMOVE 0x02
347 #define SPA_ASYNC_PROBE 0x04
348 #define SPA_ASYNC_RESILVER_DONE 0x08
349 #define SPA_ASYNC_RESILVER 0x10
351 /* device manipulation */
352 extern int spa_vdev_add(spa_t *spa, nvlist_t *nvroot);
353 extern int spa_vdev_attach(spa_t *spa, uint64_t guid, nvlist_t *nvroot,
355 extern int spa_vdev_detach(spa_t *spa, uint64_t guid, int replace_done);
356 extern int spa_vdev_remove(spa_t *spa, uint64_t guid, boolean_t unspare);
357 extern int spa_vdev_setpath(spa_t *spa, uint64_t guid, const char *newpath);
359 /* spare state (which is global across all pools) */
360 extern void spa_spare_add(vdev_t *vd);
361 extern void spa_spare_remove(vdev_t *vd);
362 extern boolean_t spa_spare_exists(uint64_t guid, uint64_t *pool, int *refcnt);
363 extern void spa_spare_activate(vdev_t *vd);
365 /* L2ARC state (which is global across all pools) */
366 extern void spa_l2cache_add(vdev_t *vd);
367 extern void spa_l2cache_remove(vdev_t *vd);
368 extern boolean_t spa_l2cache_exists(uint64_t guid, uint64_t *pool);
369 extern void spa_l2cache_activate(vdev_t *vd);
370 extern void spa_l2cache_drop(spa_t *spa);
371 extern void spa_l2cache_space_update(vdev_t *vd, int64_t space, int64_t alloc);
374 extern int spa_scrub(spa_t *spa, pool_scrub_type_t type);
377 extern void spa_sync(spa_t *spa, uint64_t txg); /* only for DMU use */
378 extern void spa_sync_allpools(void);
380 /* spa namespace global mutex */
381 extern kmutex_t spa_namespace_lock;
384 * SPA configuration functions in spa_config.c
387 #define SPA_CONFIG_UPDATE_POOL 0
388 #define SPA_CONFIG_UPDATE_VDEVS 1
390 extern void spa_config_sync(spa_t *, boolean_t, boolean_t);
391 extern void spa_config_load(void);
392 extern nvlist_t *spa_all_configs(uint64_t *);
393 extern void spa_config_set(spa_t *spa, nvlist_t *config);
394 extern nvlist_t *spa_config_generate(spa_t *spa, vdev_t *vd, uint64_t txg,
396 extern void spa_config_update(spa_t *spa, int what);
397 extern void spa_config_update_common(spa_t *spa, int what, boolean_t isroot);
400 * Miscellaneous SPA routines in spa_misc.c
403 /* Namespace manipulation */
404 extern spa_t *spa_lookup(const char *name);
405 extern spa_t *spa_add(const char *name, const char *altroot);
406 extern void spa_remove(spa_t *spa);
407 extern spa_t *spa_next(spa_t *prev);
409 /* Refcount functions */
410 extern void spa_open_ref(spa_t *spa, void *tag);
411 extern void spa_close(spa_t *spa, void *tag);
412 extern boolean_t spa_refcount_zero(spa_t *spa);
414 #define SCL_CONFIG 0x01
415 #define SCL_STATE 0x02
416 #define SCL_L2ARC 0x04 /* hack until L2ARC 2.0 */
417 #define SCL_ALLOC 0x08
419 #define SCL_FREE 0x20
420 #define SCL_VDEV 0x40
422 #define SCL_ALL ((1 << SCL_LOCKS) - 1)
423 #define SCL_STATE_ALL (SCL_STATE | SCL_L2ARC | SCL_ZIO)
425 /* Pool configuration locks */
426 extern int spa_config_tryenter(spa_t *spa, int locks, void *tag, krw_t rw);
427 extern void spa_config_enter(spa_t *spa, int locks, void *tag, krw_t rw);
428 extern void spa_config_exit(spa_t *spa, int locks, void *tag);
429 extern int spa_config_held(spa_t *spa, int locks, krw_t rw);
431 /* Pool vdev add/remove lock */
432 extern uint64_t spa_vdev_enter(spa_t *spa);
433 extern int spa_vdev_exit(spa_t *spa, vdev_t *vd, uint64_t txg, int error);
435 /* Pool vdev state change lock */
436 extern void spa_vdev_state_enter(spa_t *spa);
437 extern int spa_vdev_state_exit(spa_t *spa, vdev_t *vd, int error);
439 /* Accessor functions */
440 extern krwlock_t *spa_traverse_rwlock(spa_t *spa);
441 extern boolean_t spa_traverse_wanted(spa_t *spa);
442 extern struct dsl_pool *spa_get_dsl(spa_t *spa);
443 extern blkptr_t *spa_get_rootblkptr(spa_t *spa);
444 extern void spa_set_rootblkptr(spa_t *spa, const blkptr_t *bp);
445 extern void spa_altroot(spa_t *, char *, size_t);
446 extern int spa_sync_pass(spa_t *spa);
447 extern char *spa_name(spa_t *spa);
448 extern uint64_t spa_guid(spa_t *spa);
449 extern uint64_t spa_last_synced_txg(spa_t *spa);
450 extern uint64_t spa_first_txg(spa_t *spa);
451 extern uint64_t spa_version(spa_t *spa);
452 extern int spa_state(spa_t *spa);
453 extern uint64_t spa_freeze_txg(spa_t *spa);
454 extern uint64_t spa_get_alloc(spa_t *spa);
455 extern uint64_t spa_get_space(spa_t *spa);
456 extern uint64_t spa_get_dspace(spa_t *spa);
457 extern uint64_t spa_get_asize(spa_t *spa, uint64_t lsize);
458 extern uint64_t spa_version(spa_t *spa);
459 extern int spa_max_replication(spa_t *spa);
460 extern int spa_busy(void);
461 extern uint8_t spa_get_failmode(spa_t *spa);
462 extern boolean_t spa_suspended(spa_t *spa);
464 /* Miscellaneous support routines */
465 extern int spa_rename(const char *oldname, const char *newname);
466 extern boolean_t spa_guid_exists(uint64_t pool_guid, uint64_t device_guid);
467 extern char *spa_strdup(const char *);
468 extern void spa_strfree(char *);
469 extern uint64_t spa_get_random(uint64_t range);
470 extern void sprintf_blkptr(char *buf, int len, const blkptr_t *bp);
471 extern void spa_freeze(spa_t *spa);
472 extern void spa_upgrade(spa_t *spa, uint64_t version);
473 extern void spa_evict_all(void);
474 extern vdev_t *spa_lookup_by_guid(spa_t *spa, uint64_t guid,
476 extern boolean_t spa_has_spare(spa_t *, uint64_t guid);
477 extern uint64_t bp_get_dasize(spa_t *spa, const blkptr_t *bp);
478 extern boolean_t spa_has_slogs(spa_t *spa);
479 extern boolean_t spa_is_root(spa_t *spa);
481 /* history logging */
482 typedef enum history_log_type {
486 } history_log_type_t;
488 typedef struct history_arg {
489 const char *ha_history_str;
490 history_log_type_t ha_log_type;
491 history_internal_events_t ha_event;
492 char ha_zone[MAXPATHLEN];
495 extern char *spa_his_ievent_table[];
497 extern void spa_history_create_obj(spa_t *spa, dmu_tx_t *tx);
498 extern int spa_history_get(spa_t *spa, uint64_t *offset, uint64_t *len_read,
500 extern int spa_history_log(spa_t *spa, const char *his_buf,
501 history_log_type_t what);
502 void spa_history_internal_log(history_internal_events_t event, spa_t *spa,
503 dmu_tx_t *tx, cred_t *cr, const char *fmt, ...);
508 extern void spa_log_error(spa_t *spa, struct zio *zio);
509 extern void zfs_ereport_post(const char *class, spa_t *spa, vdev_t *vd,
510 struct zio *zio, uint64_t stateoroffset, uint64_t length);
511 extern void zfs_post_remove(spa_t *spa, vdev_t *vd);
512 extern void zfs_post_autoreplace(spa_t *spa, vdev_t *vd);
513 extern uint64_t spa_get_errlog_size(spa_t *spa);
514 extern int spa_get_errlog(spa_t *spa, void *uaddr, size_t *count);
515 extern void spa_errlog_rotate(spa_t *spa);
516 extern void spa_errlog_drain(spa_t *spa);
517 extern void spa_errlog_sync(spa_t *spa, uint64_t txg);
518 extern void spa_get_errlists(spa_t *spa, avl_tree_t *last, avl_tree_t *scrub);
521 extern void vdev_cache_stat_init(void);
522 extern void vdev_cache_stat_fini(void);
524 /* Initialization and termination */
525 extern void spa_init(int flags);
526 extern void spa_fini(void);
527 extern void spa_boot_init();
530 extern int spa_prop_set(spa_t *spa, nvlist_t *nvp);
531 extern int spa_prop_get(spa_t *spa, nvlist_t **nvp);
532 extern void spa_prop_clear_bootfs(spa_t *spa, uint64_t obj, dmu_tx_t *tx);
534 /* asynchronous event notification */
535 extern void spa_event_notify(spa_t *spa, vdev_t *vdev, const char *name);
538 #define dprintf_bp(bp, fmt, ...) do { \
539 if (zfs_flags & ZFS_DEBUG_DPRINTF) { \
540 char *__blkbuf = kmem_alloc(BP_SPRINTF_LEN, KM_SLEEP); \
541 sprintf_blkptr(__blkbuf, BP_SPRINTF_LEN, (bp)); \
542 dprintf(fmt " %s\n", __VA_ARGS__, __blkbuf); \
543 kmem_free(__blkbuf, BP_SPRINTF_LEN); \
545 _NOTE(CONSTCOND) } while (0)
547 #define dprintf_bp(bp, fmt, ...)
550 extern int spa_mode; /* mode, e.g. FREAD | FWRITE */
556 #endif /* _SYS_SPA_H */