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 spa_aux_vdev spa_aux_vdev_t;
51 * General-purpose 32-bit and 64-bit bitfield encodings.
53 #define BF32_DECODE(x, low, len) P2PHASE((x) >> (low), 1U << (len))
54 #define BF64_DECODE(x, low, len) P2PHASE((x) >> (low), 1ULL << (len))
55 #define BF32_ENCODE(x, low, len) (P2PHASE((x), 1U << (len)) << (low))
56 #define BF64_ENCODE(x, low, len) (P2PHASE((x), 1ULL << (len)) << (low))
58 #define BF32_GET(x, low, len) BF32_DECODE(x, low, len)
59 #define BF64_GET(x, low, len) BF64_DECODE(x, low, len)
61 #define BF32_SET(x, low, len, val) \
62 ((x) ^= BF32_ENCODE((x >> low) ^ (val), low, len))
63 #define BF64_SET(x, low, len, val) \
64 ((x) ^= BF64_ENCODE((x >> low) ^ (val), low, len))
66 #define BF32_GET_SB(x, low, len, shift, bias) \
67 ((BF32_GET(x, low, len) + (bias)) << (shift))
68 #define BF64_GET_SB(x, low, len, shift, bias) \
69 ((BF64_GET(x, low, len) + (bias)) << (shift))
71 #define BF32_SET_SB(x, low, len, shift, bias, val) \
72 BF32_SET(x, low, len, ((val) >> (shift)) - (bias))
73 #define BF64_SET_SB(x, low, len, shift, bias, val) \
74 BF64_SET(x, low, len, ((val) >> (shift)) - (bias))
77 * We currently support nine block sizes, from 512 bytes to 128K.
78 * We could go higher, but the benefits are near-zero and the cost
79 * of COWing a giant block to modify one byte would become excessive.
81 #define SPA_MINBLOCKSHIFT 9
82 #define SPA_MAXBLOCKSHIFT 17
83 #define SPA_MINBLOCKSIZE (1ULL << SPA_MINBLOCKSHIFT)
84 #define SPA_MAXBLOCKSIZE (1ULL << SPA_MAXBLOCKSHIFT)
86 #define SPA_BLOCKSIZES (SPA_MAXBLOCKSHIFT - SPA_MINBLOCKSHIFT + 1)
89 * Size of block to hold the configuration data (a packed nvlist)
91 #define SPA_CONFIG_BLOCKSIZE (1 << 14)
94 * The DVA size encodings for LSIZE and PSIZE support blocks up to 32MB.
95 * The ASIZE encoding should be at least 64 times larger (6 more bits)
96 * to support up to 4-way RAID-Z mirror mode with worst-case gang block
97 * overhead, three DVAs per bp, plus one more bit in case we do anything
98 * else that expands the ASIZE.
100 #define SPA_LSIZEBITS 16 /* LSIZE up to 32M (2^16 * 512) */
101 #define SPA_PSIZEBITS 16 /* PSIZE up to 32M (2^16 * 512) */
102 #define SPA_ASIZEBITS 24 /* ASIZE up to 64 times larger */
105 * All SPA data is represented by 128-bit data virtual addresses (DVAs).
106 * The members of the dva_t should be considered opaque outside the SPA.
109 uint64_t dva_word[2];
113 * Each block has a 256-bit checksum -- strong enough for cryptographic hashes.
115 typedef struct zio_cksum {
120 * Each block is described by its DVAs, time of birth, checksum, etc.
121 * The word-by-word, bit-by-bit layout of the blkptr is as follows:
123 * 64 56 48 40 32 24 16 8 0
124 * +-------+-------+-------+-------+-------+-------+-------+-------+
125 * 0 | vdev1 | GRID | ASIZE |
126 * +-------+-------+-------+-------+-------+-------+-------+-------+
128 * +-------+-------+-------+-------+-------+-------+-------+-------+
129 * 2 | vdev2 | GRID | ASIZE |
130 * +-------+-------+-------+-------+-------+-------+-------+-------+
132 * +-------+-------+-------+-------+-------+-------+-------+-------+
133 * 4 | vdev3 | GRID | ASIZE |
134 * +-------+-------+-------+-------+-------+-------+-------+-------+
136 * +-------+-------+-------+-------+-------+-------+-------+-------+
137 * 6 |E| lvl | type | cksum | comp | PSIZE | LSIZE |
138 * +-------+-------+-------+-------+-------+-------+-------+-------+
140 * +-------+-------+-------+-------+-------+-------+-------+-------+
142 * +-------+-------+-------+-------+-------+-------+-------+-------+
144 * +-------+-------+-------+-------+-------+-------+-------+-------+
146 * +-------+-------+-------+-------+-------+-------+-------+-------+
148 * +-------+-------+-------+-------+-------+-------+-------+-------+
150 * +-------+-------+-------+-------+-------+-------+-------+-------+
152 * +-------+-------+-------+-------+-------+-------+-------+-------+
154 * +-------+-------+-------+-------+-------+-------+-------+-------+
156 * +-------+-------+-------+-------+-------+-------+-------+-------+
160 * vdev virtual device ID
161 * offset offset into virtual device
163 * PSIZE physical size (after compression)
164 * ASIZE allocated size (including RAID-Z parity and gang block headers)
165 * GRID RAID-Z layout information (reserved for future use)
166 * cksum checksum function
167 * comp compression function
168 * G gang block indicator
170 * type DMU object type
171 * lvl level of indirection
172 * birth txg transaction group in which the block was born
173 * fill count number of non-zero blocks under this bp
174 * checksum[4] 256-bit checksum of the data this bp describes
176 typedef struct blkptr {
177 dva_t blk_dva[3]; /* 128-bit Data Virtual Address */
178 uint64_t blk_prop; /* size, compression, type, etc */
179 uint64_t blk_pad[3]; /* Extra space for the future */
180 uint64_t blk_birth; /* transaction group at birth */
181 uint64_t blk_fill; /* fill count */
182 zio_cksum_t blk_cksum; /* 256-bit checksum */
185 #define SPA_BLKPTRSHIFT 7 /* blkptr_t is 128 bytes */
186 #define SPA_DVAS_PER_BP 3 /* Number of DVAs in a bp */
189 * Macros to get and set fields in a bp or DVA.
191 #define DVA_GET_ASIZE(dva) \
192 BF64_GET_SB((dva)->dva_word[0], 0, 24, SPA_MINBLOCKSHIFT, 0)
193 #define DVA_SET_ASIZE(dva, x) \
194 BF64_SET_SB((dva)->dva_word[0], 0, 24, SPA_MINBLOCKSHIFT, 0, x)
196 #define DVA_GET_GRID(dva) BF64_GET((dva)->dva_word[0], 24, 8)
197 #define DVA_SET_GRID(dva, x) BF64_SET((dva)->dva_word[0], 24, 8, x)
199 #define DVA_GET_VDEV(dva) BF64_GET((dva)->dva_word[0], 32, 32)
200 #define DVA_SET_VDEV(dva, x) BF64_SET((dva)->dva_word[0], 32, 32, x)
202 #define DVA_GET_OFFSET(dva) \
203 BF64_GET_SB((dva)->dva_word[1], 0, 63, SPA_MINBLOCKSHIFT, 0)
204 #define DVA_SET_OFFSET(dva, x) \
205 BF64_SET_SB((dva)->dva_word[1], 0, 63, SPA_MINBLOCKSHIFT, 0, x)
207 #define DVA_GET_GANG(dva) BF64_GET((dva)->dva_word[1], 63, 1)
208 #define DVA_SET_GANG(dva, x) BF64_SET((dva)->dva_word[1], 63, 1, x)
210 #define BP_GET_LSIZE(bp) \
211 (BP_IS_HOLE(bp) ? 0 : \
212 BF64_GET_SB((bp)->blk_prop, 0, 16, SPA_MINBLOCKSHIFT, 1))
213 #define BP_SET_LSIZE(bp, x) \
214 BF64_SET_SB((bp)->blk_prop, 0, 16, SPA_MINBLOCKSHIFT, 1, x)
216 #define BP_GET_PSIZE(bp) \
217 BF64_GET_SB((bp)->blk_prop, 16, 16, SPA_MINBLOCKSHIFT, 1)
218 #define BP_SET_PSIZE(bp, x) \
219 BF64_SET_SB((bp)->blk_prop, 16, 16, SPA_MINBLOCKSHIFT, 1, x)
221 #define BP_GET_COMPRESS(bp) BF64_GET((bp)->blk_prop, 32, 8)
222 #define BP_SET_COMPRESS(bp, x) BF64_SET((bp)->blk_prop, 32, 8, x)
224 #define BP_GET_CHECKSUM(bp) BF64_GET((bp)->blk_prop, 40, 8)
225 #define BP_SET_CHECKSUM(bp, x) BF64_SET((bp)->blk_prop, 40, 8, x)
227 #define BP_GET_TYPE(bp) BF64_GET((bp)->blk_prop, 48, 8)
228 #define BP_SET_TYPE(bp, x) BF64_SET((bp)->blk_prop, 48, 8, x)
230 #define BP_GET_LEVEL(bp) BF64_GET((bp)->blk_prop, 56, 5)
231 #define BP_SET_LEVEL(bp, x) BF64_SET((bp)->blk_prop, 56, 5, x)
233 #define BP_GET_BYTEORDER(bp) (0 - BF64_GET((bp)->blk_prop, 63, 1))
234 #define BP_SET_BYTEORDER(bp, x) BF64_SET((bp)->blk_prop, 63, 1, x)
236 #define BP_GET_ASIZE(bp) \
237 (DVA_GET_ASIZE(&(bp)->blk_dva[0]) + DVA_GET_ASIZE(&(bp)->blk_dva[1]) + \
238 DVA_GET_ASIZE(&(bp)->blk_dva[2]))
240 #define BP_GET_UCSIZE(bp) \
241 ((BP_GET_LEVEL(bp) > 0 || dmu_ot[BP_GET_TYPE(bp)].ot_metadata) ? \
242 BP_GET_PSIZE(bp) : BP_GET_LSIZE(bp));
244 #define BP_GET_NDVAS(bp) \
245 (!!DVA_GET_ASIZE(&(bp)->blk_dva[0]) + \
246 !!DVA_GET_ASIZE(&(bp)->blk_dva[1]) + \
247 !!DVA_GET_ASIZE(&(bp)->blk_dva[2]))
249 #define BP_COUNT_GANG(bp) \
250 (DVA_GET_GANG(&(bp)->blk_dva[0]) + \
251 DVA_GET_GANG(&(bp)->blk_dva[1]) + \
252 DVA_GET_GANG(&(bp)->blk_dva[2]))
254 #define DVA_EQUAL(dva1, dva2) \
255 ((dva1)->dva_word[1] == (dva2)->dva_word[1] && \
256 (dva1)->dva_word[0] == (dva2)->dva_word[0])
258 #define ZIO_CHECKSUM_EQUAL(zc1, zc2) \
259 (0 == (((zc1).zc_word[0] - (zc2).zc_word[0]) | \
260 ((zc1).zc_word[1] - (zc2).zc_word[1]) | \
261 ((zc1).zc_word[2] - (zc2).zc_word[2]) | \
262 ((zc1).zc_word[3] - (zc2).zc_word[3])))
264 #define DVA_IS_VALID(dva) (DVA_GET_ASIZE(dva) != 0)
266 #define ZIO_SET_CHECKSUM(zcp, w0, w1, w2, w3) \
268 (zcp)->zc_word[0] = w0; \
269 (zcp)->zc_word[1] = w1; \
270 (zcp)->zc_word[2] = w2; \
271 (zcp)->zc_word[3] = w3; \
274 #define BP_IDENTITY(bp) (&(bp)->blk_dva[0])
275 #define BP_IS_GANG(bp) DVA_GET_GANG(BP_IDENTITY(bp))
276 #define BP_IS_HOLE(bp) ((bp)->blk_birth == 0)
277 #define BP_IS_OLDER(bp, txg) (!BP_IS_HOLE(bp) && (bp)->blk_birth < (txg))
279 #define BP_ZERO(bp) \
281 (bp)->blk_dva[0].dva_word[0] = 0; \
282 (bp)->blk_dva[0].dva_word[1] = 0; \
283 (bp)->blk_dva[1].dva_word[0] = 0; \
284 (bp)->blk_dva[1].dva_word[1] = 0; \
285 (bp)->blk_dva[2].dva_word[0] = 0; \
286 (bp)->blk_dva[2].dva_word[1] = 0; \
287 (bp)->blk_prop = 0; \
288 (bp)->blk_pad[0] = 0; \
289 (bp)->blk_pad[1] = 0; \
290 (bp)->blk_pad[2] = 0; \
291 (bp)->blk_birth = 0; \
292 (bp)->blk_fill = 0; \
293 ZIO_SET_CHECKSUM(&(bp)->blk_cksum, 0, 0, 0, 0); \
296 #define BLK_FILL_ALREADY_FREED (-1ULL)
299 * Note: the byteorder is either 0 or -1, both of which are palindromes.
300 * This simplifies the endianness handling a bit.
303 #define ZFS_HOST_BYTEORDER (0ULL)
305 #define ZFS_HOST_BYTEORDER (-1ULL)
308 #define BP_SHOULD_BYTESWAP(bp) (BP_GET_BYTEORDER(bp) != ZFS_HOST_BYTEORDER)
310 #define BP_SPRINTF_LEN 320
314 #define BP_GET_BUFC_TYPE(bp) \
315 (((BP_GET_LEVEL(bp) > 0) || (dmu_ot[BP_GET_TYPE(bp)].ot_metadata)) ? \
316 ARC_BUFC_METADATA : ARC_BUFC_DATA);
318 * Routines found in spa.c
321 /* state manipulation functions */
322 extern int spa_open(const char *pool, spa_t **, void *tag);
323 extern int spa_get_stats(const char *pool, nvlist_t **config,
324 char *altroot, size_t buflen);
325 extern int spa_create(const char *pool, nvlist_t *config, nvlist_t *props,
326 const char *history_str, nvlist_t *zplprops);
327 extern int spa_check_rootconf(char *devpath, char *devid,
328 nvlist_t **bestconf, uint64_t *besttxg);
329 extern boolean_t spa_rootdev_validate(nvlist_t *nv);
330 extern int spa_import_rootpool(char *devpath, char *devid);
331 extern int spa_import(const char *pool, nvlist_t *config, nvlist_t *props);
332 extern int spa_import_faulted(const char *, nvlist_t *, nvlist_t *);
333 extern nvlist_t *spa_tryimport(nvlist_t *tryconfig);
334 extern int spa_destroy(char *pool);
335 extern int spa_export(char *pool, nvlist_t **oldconfig, boolean_t force,
336 boolean_t hardforce);
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, uint64_t pguid,
357 extern int spa_vdev_remove(spa_t *spa, uint64_t guid, boolean_t unspare);
358 extern int spa_vdev_setpath(spa_t *spa, uint64_t guid, const char *newpath);
360 /* spare state (which is global across all pools) */
361 extern void spa_spare_add(vdev_t *vd);
362 extern void spa_spare_remove(vdev_t *vd);
363 extern boolean_t spa_spare_exists(uint64_t guid, uint64_t *pool, int *refcnt);
364 extern void spa_spare_activate(vdev_t *vd);
366 /* L2ARC state (which is global across all pools) */
367 extern void spa_l2cache_add(vdev_t *vd);
368 extern void spa_l2cache_remove(vdev_t *vd);
369 extern boolean_t spa_l2cache_exists(uint64_t guid, uint64_t *pool);
370 extern void spa_l2cache_activate(vdev_t *vd);
371 extern void spa_l2cache_drop(spa_t *spa);
372 extern void spa_l2cache_space_update(vdev_t *vd, int64_t space, int64_t alloc);
375 extern int spa_scrub(spa_t *spa, pool_scrub_type_t type);
378 extern void spa_sync(spa_t *spa, uint64_t txg); /* only for DMU use */
379 extern void spa_sync_allpools(void);
381 /* spa namespace global mutex */
382 extern kmutex_t spa_namespace_lock;
385 * SPA configuration functions in spa_config.c
388 #define SPA_CONFIG_UPDATE_POOL 0
389 #define SPA_CONFIG_UPDATE_VDEVS 1
391 extern void spa_config_sync(spa_t *, boolean_t, boolean_t);
392 extern void spa_config_load(void);
393 extern nvlist_t *spa_all_configs(uint64_t *);
394 extern void spa_config_set(spa_t *spa, nvlist_t *config);
395 extern nvlist_t *spa_config_generate(spa_t *spa, vdev_t *vd, uint64_t txg,
397 extern void spa_config_update(spa_t *spa, int what);
398 extern void spa_config_update_common(spa_t *spa, int what, boolean_t isroot);
401 * Miscellaneous SPA routines in spa_misc.c
404 /* Namespace manipulation */
405 extern spa_t *spa_lookup(const char *name);
406 extern spa_t *spa_add(const char *name, const char *altroot);
407 extern void spa_remove(spa_t *spa);
408 extern spa_t *spa_next(spa_t *prev);
410 /* Refcount functions */
411 extern void spa_open_ref(spa_t *spa, void *tag);
412 extern void spa_close(spa_t *spa, void *tag);
413 extern boolean_t spa_refcount_zero(spa_t *spa);
415 #define SCL_CONFIG 0x01
416 #define SCL_STATE 0x02
417 #define SCL_L2ARC 0x04 /* hack until L2ARC 2.0 */
418 #define SCL_ALLOC 0x08
420 #define SCL_FREE 0x20
421 #define SCL_VDEV 0x40
423 #define SCL_ALL ((1 << SCL_LOCKS) - 1)
424 #define SCL_STATE_ALL (SCL_STATE | SCL_L2ARC | SCL_ZIO)
426 /* Pool configuration locks */
427 extern int spa_config_tryenter(spa_t *spa, int locks, void *tag, krw_t rw);
428 extern void spa_config_enter(spa_t *spa, int locks, void *tag, krw_t rw);
429 extern void spa_config_exit(spa_t *spa, int locks, void *tag);
430 extern int spa_config_held(spa_t *spa, int locks, krw_t rw);
432 /* Pool vdev add/remove lock */
433 extern uint64_t spa_vdev_enter(spa_t *spa);
434 extern int spa_vdev_exit(spa_t *spa, vdev_t *vd, uint64_t txg, int error);
436 /* Pool vdev state change lock */
437 extern void spa_vdev_state_enter(spa_t *spa);
438 extern int spa_vdev_state_exit(spa_t *spa, vdev_t *vd, int error);
440 /* Accessor functions */
441 extern boolean_t spa_shutting_down(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 pool_state_t 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);
480 extern boolean_t spa_writeable(spa_t *spa);
481 extern int spa_mode(spa_t *spa);
483 /* history logging */
484 typedef enum history_log_type {
488 } history_log_type_t;
490 typedef struct history_arg {
491 const char *ha_history_str;
492 history_log_type_t ha_log_type;
493 history_internal_events_t ha_event;
494 char ha_zone[MAXPATHLEN];
497 extern char *spa_his_ievent_table[];
499 extern void spa_history_create_obj(spa_t *spa, dmu_tx_t *tx);
500 extern int spa_history_get(spa_t *spa, uint64_t *offset, uint64_t *len_read,
502 extern int spa_history_log(spa_t *spa, const char *his_buf,
503 history_log_type_t what);
504 void spa_history_internal_log(history_internal_events_t event, spa_t *spa,
505 dmu_tx_t *tx, cred_t *cr, const char *fmt, ...);
510 extern void spa_log_error(spa_t *spa, struct zio *zio);
511 extern void zfs_ereport_post(const char *class, spa_t *spa, vdev_t *vd,
512 struct zio *zio, uint64_t stateoroffset, uint64_t length);
513 extern void zfs_post_remove(spa_t *spa, vdev_t *vd);
514 extern void zfs_post_autoreplace(spa_t *spa, vdev_t *vd);
515 extern uint64_t spa_get_errlog_size(spa_t *spa);
516 extern int spa_get_errlog(spa_t *spa, void *uaddr, size_t *count);
517 extern void spa_errlog_rotate(spa_t *spa);
518 extern void spa_errlog_drain(spa_t *spa);
519 extern void spa_errlog_sync(spa_t *spa, uint64_t txg);
520 extern void spa_get_errlists(spa_t *spa, avl_tree_t *last, avl_tree_t *scrub);
523 extern void vdev_cache_stat_init(void);
524 extern void vdev_cache_stat_fini(void);
526 /* Initialization and termination */
527 extern void spa_init(int flags);
528 extern void spa_fini(void);
529 extern void spa_boot_init();
532 extern int spa_prop_set(spa_t *spa, nvlist_t *nvp);
533 extern int spa_prop_get(spa_t *spa, nvlist_t **nvp);
534 extern void spa_prop_clear_bootfs(spa_t *spa, uint64_t obj, dmu_tx_t *tx);
536 /* asynchronous event notification */
537 extern void spa_event_notify(spa_t *spa, vdev_t *vdev, const char *name);
540 #define dprintf_bp(bp, fmt, ...) do { \
541 if (zfs_flags & ZFS_DEBUG_DPRINTF) { \
542 char *__blkbuf = kmem_alloc(BP_SPRINTF_LEN, KM_SLEEP); \
543 sprintf_blkptr(__blkbuf, BP_SPRINTF_LEN, (bp)); \
544 dprintf(fmt " %s\n", __VA_ARGS__, __blkbuf); \
545 kmem_free(__blkbuf, BP_SPRINTF_LEN); \
547 _NOTE(CONSTCOND) } while (0)
549 #define dprintf_bp(bp, fmt, ...)
552 extern int spa_mode_global; /* mode, e.g. FREAD | FWRITE */
558 #endif /* _SYS_SPA_H */