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
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10 * See the License for the specific language governing permissions
11 * and limitations under the License.
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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.
29 #pragma ident "@(#)spa.h 1.31 08/04/09 SMI"
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>
43 * Forward references that lots of things need.
45 typedef struct spa spa_t;
46 typedef struct vdev vdev_t;
47 typedef struct metaslab metaslab_t;
48 typedef struct zilog zilog_t;
49 typedef struct traverse_handle traverse_handle_t;
50 typedef struct spa_aux_vdev spa_aux_vdev_t;
54 * General-purpose 32-bit and 64-bit bitfield encodings.
56 #define BF32_DECODE(x, low, len) P2PHASE((x) >> (low), 1U << (len))
57 #define BF64_DECODE(x, low, len) P2PHASE((x) >> (low), 1ULL << (len))
58 #define BF32_ENCODE(x, low, len) (P2PHASE((x), 1U << (len)) << (low))
59 #define BF64_ENCODE(x, low, len) (P2PHASE((x), 1ULL << (len)) << (low))
61 #define BF32_GET(x, low, len) BF32_DECODE(x, low, len)
62 #define BF64_GET(x, low, len) BF64_DECODE(x, low, len)
64 #define BF32_SET(x, low, len, val) \
65 ((x) ^= BF32_ENCODE((x >> low) ^ (val), low, len))
66 #define BF64_SET(x, low, len, val) \
67 ((x) ^= BF64_ENCODE((x >> low) ^ (val), low, len))
69 #define BF32_GET_SB(x, low, len, shift, bias) \
70 ((BF32_GET(x, low, len) + (bias)) << (shift))
71 #define BF64_GET_SB(x, low, len, shift, bias) \
72 ((BF64_GET(x, low, len) + (bias)) << (shift))
74 #define BF32_SET_SB(x, low, len, shift, bias, val) \
75 BF32_SET(x, low, len, ((val) >> (shift)) - (bias))
76 #define BF64_SET_SB(x, low, len, shift, bias, val) \
77 BF64_SET(x, low, len, ((val) >> (shift)) - (bias))
80 * We currently support nine block sizes, from 512 bytes to 128K.
81 * We could go higher, but the benefits are near-zero and the cost
82 * of COWing a giant block to modify one byte would become excessive.
84 #define SPA_MINBLOCKSHIFT 9
85 #define SPA_MAXBLOCKSHIFT 17
86 #define SPA_MINBLOCKSIZE (1ULL << SPA_MINBLOCKSHIFT)
87 #define SPA_MAXBLOCKSIZE (1ULL << SPA_MAXBLOCKSHIFT)
89 #define SPA_BLOCKSIZES (SPA_MAXBLOCKSHIFT - SPA_MINBLOCKSHIFT + 1)
92 * The DVA size encodings for LSIZE and PSIZE support blocks up to 32MB.
93 * The ASIZE encoding should be at least 64 times larger (6 more bits)
94 * to support up to 4-way RAID-Z mirror mode with worst-case gang block
95 * overhead, three DVAs per bp, plus one more bit in case we do anything
96 * else that expands the ASIZE.
98 #define SPA_LSIZEBITS 16 /* LSIZE up to 32M (2^16 * 512) */
99 #define SPA_PSIZEBITS 16 /* PSIZE up to 32M (2^16 * 512) */
100 #define SPA_ASIZEBITS 24 /* ASIZE up to 64 times larger */
103 * All SPA data is represented by 128-bit data virtual addresses (DVAs).
104 * The members of the dva_t should be considered opaque outside the SPA.
107 uint64_t dva_word[2];
111 * Each block has a 256-bit checksum -- strong enough for cryptographic hashes.
113 typedef struct zio_cksum {
118 * Each block is described by its DVAs, time of birth, checksum, etc.
119 * The word-by-word, bit-by-bit layout of the blkptr is as follows:
121 * 64 56 48 40 32 24 16 8 0
122 * +-------+-------+-------+-------+-------+-------+-------+-------+
123 * 0 | vdev1 | GRID | ASIZE |
124 * +-------+-------+-------+-------+-------+-------+-------+-------+
126 * +-------+-------+-------+-------+-------+-------+-------+-------+
127 * 2 | vdev2 | GRID | ASIZE |
128 * +-------+-------+-------+-------+-------+-------+-------+-------+
130 * +-------+-------+-------+-------+-------+-------+-------+-------+
131 * 4 | vdev3 | GRID | ASIZE |
132 * +-------+-------+-------+-------+-------+-------+-------+-------+
134 * +-------+-------+-------+-------+-------+-------+-------+-------+
135 * 6 |E| lvl | type | cksum | comp | PSIZE | LSIZE |
136 * +-------+-------+-------+-------+-------+-------+-------+-------+
138 * +-------+-------+-------+-------+-------+-------+-------+-------+
140 * +-------+-------+-------+-------+-------+-------+-------+-------+
142 * +-------+-------+-------+-------+-------+-------+-------+-------+
144 * +-------+-------+-------+-------+-------+-------+-------+-------+
146 * +-------+-------+-------+-------+-------+-------+-------+-------+
148 * +-------+-------+-------+-------+-------+-------+-------+-------+
150 * +-------+-------+-------+-------+-------+-------+-------+-------+
152 * +-------+-------+-------+-------+-------+-------+-------+-------+
154 * +-------+-------+-------+-------+-------+-------+-------+-------+
158 * vdev virtual device ID
159 * offset offset into virtual device
161 * PSIZE physical size (after compression)
162 * ASIZE allocated size (including RAID-Z parity and gang block headers)
163 * GRID RAID-Z layout information (reserved for future use)
164 * cksum checksum function
165 * comp compression function
166 * G gang block indicator
168 * type DMU object type
169 * lvl level of indirection
170 * birth txg transaction group in which the block was born
171 * fill count number of non-zero blocks under this bp
172 * checksum[4] 256-bit checksum of the data this bp describes
174 typedef struct blkptr {
175 dva_t blk_dva[3]; /* 128-bit Data Virtual Address */
176 uint64_t blk_prop; /* size, compression, type, etc */
177 uint64_t blk_pad[3]; /* Extra space for the future */
178 uint64_t blk_birth; /* transaction group at birth */
179 uint64_t blk_fill; /* fill count */
180 zio_cksum_t blk_cksum; /* 256-bit checksum */
183 #define SPA_BLKPTRSHIFT 7 /* blkptr_t is 128 bytes */
184 #define SPA_DVAS_PER_BP 3 /* Number of DVAs in a bp */
187 * Macros to get and set fields in a bp or DVA.
189 #define DVA_GET_ASIZE(dva) \
190 BF64_GET_SB((dva)->dva_word[0], 0, 24, SPA_MINBLOCKSHIFT, 0)
191 #define DVA_SET_ASIZE(dva, x) \
192 BF64_SET_SB((dva)->dva_word[0], 0, 24, SPA_MINBLOCKSHIFT, 0, x)
194 #define DVA_GET_GRID(dva) BF64_GET((dva)->dva_word[0], 24, 8)
195 #define DVA_SET_GRID(dva, x) BF64_SET((dva)->dva_word[0], 24, 8, x)
197 #define DVA_GET_VDEV(dva) BF64_GET((dva)->dva_word[0], 32, 32)
198 #define DVA_SET_VDEV(dva, x) BF64_SET((dva)->dva_word[0], 32, 32, x)
200 #define DVA_GET_OFFSET(dva) \
201 BF64_GET_SB((dva)->dva_word[1], 0, 63, SPA_MINBLOCKSHIFT, 0)
202 #define DVA_SET_OFFSET(dva, x) \
203 BF64_SET_SB((dva)->dva_word[1], 0, 63, SPA_MINBLOCKSHIFT, 0, x)
205 #define DVA_GET_GANG(dva) BF64_GET((dva)->dva_word[1], 63, 1)
206 #define DVA_SET_GANG(dva, x) BF64_SET((dva)->dva_word[1], 63, 1, x)
208 #define BP_GET_LSIZE(bp) \
209 (BP_IS_HOLE(bp) ? 0 : \
210 BF64_GET_SB((bp)->blk_prop, 0, 16, SPA_MINBLOCKSHIFT, 1))
211 #define BP_SET_LSIZE(bp, x) \
212 BF64_SET_SB((bp)->blk_prop, 0, 16, SPA_MINBLOCKSHIFT, 1, x)
214 #define BP_GET_PSIZE(bp) \
215 BF64_GET_SB((bp)->blk_prop, 16, 16, SPA_MINBLOCKSHIFT, 1)
216 #define BP_SET_PSIZE(bp, x) \
217 BF64_SET_SB((bp)->blk_prop, 16, 16, SPA_MINBLOCKSHIFT, 1, x)
219 #define BP_GET_COMPRESS(bp) BF64_GET((bp)->blk_prop, 32, 8)
220 #define BP_SET_COMPRESS(bp, x) BF64_SET((bp)->blk_prop, 32, 8, x)
222 #define BP_GET_CHECKSUM(bp) BF64_GET((bp)->blk_prop, 40, 8)
223 #define BP_SET_CHECKSUM(bp, x) BF64_SET((bp)->blk_prop, 40, 8, x)
225 #define BP_GET_TYPE(bp) BF64_GET((bp)->blk_prop, 48, 8)
226 #define BP_SET_TYPE(bp, x) BF64_SET((bp)->blk_prop, 48, 8, x)
228 #define BP_GET_LEVEL(bp) BF64_GET((bp)->blk_prop, 56, 5)
229 #define BP_SET_LEVEL(bp, x) BF64_SET((bp)->blk_prop, 56, 5, x)
231 #define BP_GET_BYTEORDER(bp) (0 - BF64_GET((bp)->blk_prop, 63, 1))
232 #define BP_SET_BYTEORDER(bp, x) BF64_SET((bp)->blk_prop, 63, 1, x)
234 #define BP_GET_ASIZE(bp) \
235 (DVA_GET_ASIZE(&(bp)->blk_dva[0]) + DVA_GET_ASIZE(&(bp)->blk_dva[1]) + \
236 DVA_GET_ASIZE(&(bp)->blk_dva[2]))
238 #define BP_GET_UCSIZE(bp) \
239 ((BP_GET_LEVEL(bp) > 0 || dmu_ot[BP_GET_TYPE(bp)].ot_metadata) ? \
240 BP_GET_PSIZE(bp) : BP_GET_LSIZE(bp));
242 #define BP_GET_NDVAS(bp) \
243 (!!DVA_GET_ASIZE(&(bp)->blk_dva[0]) + \
244 !!DVA_GET_ASIZE(&(bp)->blk_dva[1]) + \
245 !!DVA_GET_ASIZE(&(bp)->blk_dva[2]))
247 #define BP_COUNT_GANG(bp) \
248 (DVA_GET_GANG(&(bp)->blk_dva[0]) + \
249 DVA_GET_GANG(&(bp)->blk_dva[1]) + \
250 DVA_GET_GANG(&(bp)->blk_dva[2]))
252 #define DVA_EQUAL(dva1, dva2) \
253 ((dva1)->dva_word[1] == (dva2)->dva_word[1] && \
254 (dva1)->dva_word[0] == (dva2)->dva_word[0])
256 #define ZIO_CHECKSUM_EQUAL(zc1, zc2) \
257 (0 == (((zc1).zc_word[0] - (zc2).zc_word[0]) | \
258 ((zc1).zc_word[1] - (zc2).zc_word[1]) | \
259 ((zc1).zc_word[2] - (zc2).zc_word[2]) | \
260 ((zc1).zc_word[3] - (zc2).zc_word[3])))
263 #define DVA_IS_VALID(dva) (DVA_GET_ASIZE(dva) != 0)
265 #define ZIO_SET_CHECKSUM(zcp, w0, w1, w2, w3) \
267 (zcp)->zc_word[0] = w0; \
268 (zcp)->zc_word[1] = w1; \
269 (zcp)->zc_word[2] = w2; \
270 (zcp)->zc_word[3] = w3; \
273 #define BP_IDENTITY(bp) (&(bp)->blk_dva[0])
274 #define BP_IS_GANG(bp) DVA_GET_GANG(BP_IDENTITY(bp))
275 #define BP_IS_HOLE(bp) ((bp)->blk_birth == 0)
276 #define BP_IS_OLDER(bp, txg) (!BP_IS_HOLE(bp) && (bp)->blk_birth < (txg))
278 #define BP_ZERO_DVAS(bp) \
280 (bp)->blk_dva[0].dva_word[0] = 0; \
281 (bp)->blk_dva[0].dva_word[1] = 0; \
282 (bp)->blk_dva[1].dva_word[0] = 0; \
283 (bp)->blk_dva[1].dva_word[1] = 0; \
284 (bp)->blk_dva[2].dva_word[0] = 0; \
285 (bp)->blk_dva[2].dva_word[1] = 0; \
286 (bp)->blk_birth = 0; \
289 #define BP_ZERO(bp) \
292 (bp)->blk_prop = 0; \
293 (bp)->blk_pad[0] = 0; \
294 (bp)->blk_pad[1] = 0; \
295 (bp)->blk_pad[2] = 0; \
296 (bp)->blk_fill = 0; \
297 ZIO_SET_CHECKSUM(&(bp)->blk_cksum, 0, 0, 0, 0); \
301 * Note: the byteorder is either 0 or -1, both of which are palindromes.
302 * This simplifies the endianness handling a bit.
305 #define ZFS_HOST_BYTEORDER (0ULL)
307 #define ZFS_HOST_BYTEORDER (-1ULL)
310 #define BP_SHOULD_BYTESWAP(bp) (BP_GET_BYTEORDER(bp) != ZFS_HOST_BYTEORDER)
312 #define BP_SPRINTF_LEN 320
316 #define BP_GET_BUFC_TYPE(bp) \
317 (((BP_GET_LEVEL(bp) > 0) || (dmu_ot[BP_GET_TYPE(bp)].ot_metadata)) ? \
318 ARC_BUFC_METADATA : ARC_BUFC_DATA);
320 * Routines found in spa.c
323 /* state manipulation functions */
324 extern int spa_open(const char *pool, spa_t **, void *tag);
325 extern int spa_get_stats(const char *pool, nvlist_t **config,
326 char *altroot, size_t buflen);
327 extern int spa_create(const char *pool, nvlist_t *config, nvlist_t *props,
328 const char *history_str);
329 extern void spa_check_rootconf(char *devpath, char **the_dev_p,
330 nvlist_t **the_conf_p, uint64_t *the_txg_p);
331 extern boolean_t spa_rootdev_validate(nvlist_t *nv);
332 extern int spa_import_rootpool(char *devpath);
333 extern int spa_import(const char *pool, nvlist_t *config, nvlist_t *props);
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);
337 extern int spa_reset(char *pool);
338 extern void spa_async_request(spa_t *spa, int flag);
339 extern void spa_async_suspend(spa_t *spa);
340 extern void spa_async_resume(spa_t *spa);
341 extern spa_t *spa_inject_addref(char *pool);
342 extern void spa_inject_delref(spa_t *spa);
344 #define SPA_ASYNC_REMOVE 0x01
345 #define SPA_ASYNC_RESILVER_DONE 0x02
346 #define SPA_ASYNC_SCRUB 0x04
347 #define SPA_ASYNC_RESILVER 0x08
348 #define SPA_ASYNC_CONFIG_UPDATE 0x10
350 /* device manipulation */
351 extern int spa_vdev_add(spa_t *spa, nvlist_t *nvroot);
352 extern int spa_vdev_attach(spa_t *spa, uint64_t guid, nvlist_t *nvroot,
354 extern int spa_vdev_detach(spa_t *spa, uint64_t guid, int replace_done);
355 extern int spa_vdev_remove(spa_t *spa, uint64_t guid, boolean_t unspare);
356 extern int spa_vdev_setpath(spa_t *spa, uint64_t guid, const char *newpath);
358 /* spare state (which is global across all pools) */
359 extern void spa_spare_add(vdev_t *vd);
360 extern void spa_spare_remove(vdev_t *vd);
361 extern boolean_t spa_spare_exists(uint64_t guid, uint64_t *pool);
362 extern void spa_spare_activate(vdev_t *vd);
364 /* L2ARC state (which is global across all pools) */
365 extern void spa_l2cache_add(vdev_t *vd);
366 extern void spa_l2cache_remove(vdev_t *vd);
367 extern boolean_t spa_l2cache_exists(uint64_t guid, uint64_t *pool);
368 extern void spa_l2cache_activate(vdev_t *vd);
369 extern void spa_l2cache_drop(spa_t *spa);
370 extern void spa_l2cache_space_update(vdev_t *vd, int64_t space, int64_t alloc);
373 extern int spa_scrub(spa_t *spa, pool_scrub_type_t type, boolean_t force);
374 extern void spa_scrub_suspend(spa_t *spa);
375 extern void spa_scrub_resume(spa_t *spa);
376 extern void spa_scrub_restart(spa_t *spa, uint64_t txg);
379 extern void spa_sync(spa_t *spa, uint64_t txg); /* only for DMU use */
380 extern void spa_sync_allpools(void);
383 * SPA configuration functions in spa_config.c
386 #define SPA_CONFIG_UPDATE_POOL 0
387 #define SPA_CONFIG_UPDATE_VDEVS 1
389 extern void spa_config_sync(void);
390 extern void spa_config_check(const char *, const char *);
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 /* Pool configuration lock */
415 extern void spa_config_enter(spa_t *spa, krw_t rw, void *tag);
416 extern void spa_config_exit(spa_t *spa, void *tag);
417 extern boolean_t spa_config_held(spa_t *spa, krw_t rw);
419 /* Pool vdev add/remove lock */
420 extern uint64_t spa_vdev_enter(spa_t *spa);
421 extern int spa_vdev_exit(spa_t *spa, vdev_t *vd, uint64_t txg, int error);
423 /* Accessor functions */
424 extern krwlock_t *spa_traverse_rwlock(spa_t *spa);
425 extern int spa_traverse_wanted(spa_t *spa);
426 extern struct dsl_pool *spa_get_dsl(spa_t *spa);
427 extern blkptr_t *spa_get_rootblkptr(spa_t *spa);
428 extern void spa_set_rootblkptr(spa_t *spa, const blkptr_t *bp);
429 extern void spa_altroot(spa_t *, char *, size_t);
430 extern int spa_sync_pass(spa_t *spa);
431 extern char *spa_name(spa_t *spa);
432 extern uint64_t spa_guid(spa_t *spa);
433 extern uint64_t spa_last_synced_txg(spa_t *spa);
434 extern uint64_t spa_first_txg(spa_t *spa);
435 extern uint64_t spa_version(spa_t *spa);
436 extern int spa_state(spa_t *spa);
437 extern uint64_t spa_freeze_txg(spa_t *spa);
438 extern uint64_t spa_get_alloc(spa_t *spa);
439 extern uint64_t spa_get_space(spa_t *spa);
440 extern uint64_t spa_get_dspace(spa_t *spa);
441 extern uint64_t spa_get_asize(spa_t *spa, uint64_t lsize);
442 extern uint64_t spa_version(spa_t *spa);
443 extern int spa_max_replication(spa_t *spa);
444 extern int spa_busy(void);
445 extern uint8_t spa_get_failmode(spa_t *spa);
447 /* Miscellaneous support routines */
448 extern int spa_rename(const char *oldname, const char *newname);
449 extern boolean_t spa_guid_exists(uint64_t pool_guid, uint64_t device_guid);
450 extern char *spa_strdup(const char *);
451 extern void spa_strfree(char *);
452 extern uint64_t spa_get_random(uint64_t range);
453 extern void sprintf_blkptr(char *buf, int len, const blkptr_t *bp);
454 extern void spa_freeze(spa_t *spa);
455 extern void spa_upgrade(spa_t *spa, uint64_t version);
456 extern void spa_evict_all(void);
457 extern vdev_t *spa_lookup_by_guid(spa_t *spa, uint64_t guid);
458 extern boolean_t spa_has_spare(spa_t *, uint64_t guid);
459 extern uint64_t bp_get_dasize(spa_t *spa, const blkptr_t *bp);
460 extern boolean_t spa_has_slogs(spa_t *spa);
462 /* history logging */
463 typedef enum history_log_type {
467 } history_log_type_t;
469 typedef struct history_arg {
470 const char *ha_history_str;
471 history_log_type_t ha_log_type;
472 history_internal_events_t ha_event;
473 char ha_zone[MAXPATHLEN];
476 extern char *spa_his_ievent_table[];
478 extern void spa_history_create_obj(spa_t *spa, dmu_tx_t *tx);
479 extern int spa_history_get(spa_t *spa, uint64_t *offset, uint64_t *len_read,
481 extern int spa_history_log(spa_t *spa, const char *his_buf,
482 history_log_type_t what);
483 void spa_history_internal_log(history_internal_events_t event, spa_t *spa,
484 dmu_tx_t *tx, cred_t *cr, const char *fmt, ...);
489 extern void spa_log_error(spa_t *spa, struct zio *zio);
490 extern void zfs_ereport_post(const char *class, spa_t *spa, vdev_t *vd,
491 struct zio *zio, uint64_t stateoroffset, uint64_t length);
492 extern void zfs_post_ok(spa_t *spa, vdev_t *vd);
493 extern void zfs_post_remove(spa_t *spa, vdev_t *vd);
494 extern void zfs_post_autoreplace(spa_t *spa, vdev_t *vd);
495 extern uint64_t spa_get_errlog_size(spa_t *spa);
496 extern int spa_get_errlog(spa_t *spa, void *uaddr, size_t *count);
497 extern void spa_errlog_rotate(spa_t *spa);
498 extern void spa_errlog_drain(spa_t *spa);
499 extern void spa_errlog_sync(spa_t *spa, uint64_t txg);
500 extern void spa_get_errlists(spa_t *spa, avl_tree_t *last, avl_tree_t *scrub);
503 extern void vdev_cache_stat_init(void);
504 extern void vdev_cache_stat_fini(void);
506 /* Initialization and termination */
507 extern void spa_init(int flags);
508 extern void spa_fini(void);
509 extern void spa_boot_init();
512 extern int spa_prop_set(spa_t *spa, nvlist_t *nvp);
513 extern int spa_prop_get(spa_t *spa, nvlist_t **nvp);
514 extern void spa_prop_clear_bootfs(spa_t *spa, uint64_t obj, dmu_tx_t *tx);
516 /* asynchronous event notification */
517 extern void spa_event_notify(spa_t *spa, vdev_t *vdev, const char *name);
520 #define dprintf_bp(bp, fmt, ...) do { \
521 if (zfs_flags & ZFS_DEBUG_DPRINTF) { \
522 char *__blkbuf = kmem_alloc(BP_SPRINTF_LEN, KM_SLEEP); \
523 sprintf_blkptr(__blkbuf, BP_SPRINTF_LEN, (bp)); \
524 dprintf(fmt " %s\n", __VA_ARGS__, __blkbuf); \
525 kmem_free(__blkbuf, BP_SPRINTF_LEN); \
527 _NOTE(CONSTCOND) } while (0)
529 #define dprintf_bp(bp, fmt, ...)
532 extern int spa_mode; /* mode, e.g. FREAD | FWRITE */
538 #endif /* _SYS_SPA_H */