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.
29 #include <sys/zfs_context.h>
30 #include <sys/nvpair.h>
31 #include <sys/sysmacros.h>
32 #include <sys/types.h>
33 #include <sys/fs/zfs.h>
40 * Forward references that lots of things need.
42 typedef struct spa spa_t
;
43 typedef struct vdev vdev_t
;
44 typedef struct metaslab metaslab_t
;
45 typedef struct metaslab_group metaslab_group_t
;
46 typedef struct metaslab_class metaslab_class_t
;
47 typedef struct zio zio_t
;
48 typedef struct zilog zilog_t
;
49 typedef struct spa_aux_vdev spa_aux_vdev_t
;
50 typedef struct ddt ddt_t
;
51 typedef struct ddt_entry ddt_entry_t
;
55 * General-purpose 32-bit and 64-bit bitfield encodings.
57 #define BF32_DECODE(x, low, len) P2PHASE((x) >> (low), 1U << (len))
58 #define BF64_DECODE(x, low, len) P2PHASE((x) >> (low), 1ULL << (len))
59 #define BF32_ENCODE(x, low, len) (P2PHASE((x), 1U << (len)) << (low))
60 #define BF64_ENCODE(x, low, len) (P2PHASE((x), 1ULL << (len)) << (low))
62 #define BF32_GET(x, low, len) BF32_DECODE(x, low, len)
63 #define BF64_GET(x, low, len) BF64_DECODE(x, low, len)
65 #define BF32_SET(x, low, len, val) \
66 ((x) ^= BF32_ENCODE((x >> low) ^ (val), low, len))
67 #define BF64_SET(x, low, len, val) \
68 ((x) ^= BF64_ENCODE((x >> low) ^ (val), low, len))
70 #define BF32_GET_SB(x, low, len, shift, bias) \
71 ((BF32_GET(x, low, len) + (bias)) << (shift))
72 #define BF64_GET_SB(x, low, len, shift, bias) \
73 ((BF64_GET(x, low, len) + (bias)) << (shift))
75 #define BF32_SET_SB(x, low, len, shift, bias, val) \
76 BF32_SET(x, low, len, ((val) >> (shift)) - (bias))
77 #define BF64_SET_SB(x, low, len, shift, bias, val) \
78 BF64_SET(x, low, len, ((val) >> (shift)) - (bias))
81 * We currently support nine block sizes, from 512 bytes to 128K.
82 * We could go higher, but the benefits are near-zero and the cost
83 * of COWing a giant block to modify one byte would become excessive.
85 #define SPA_MINBLOCKSHIFT 9
86 #define SPA_MAXBLOCKSHIFT 17
87 #define SPA_MINBLOCKSIZE (1ULL << SPA_MINBLOCKSHIFT)
88 #define SPA_MAXBLOCKSIZE (1ULL << SPA_MAXBLOCKSHIFT)
90 #define SPA_BLOCKSIZES (SPA_MAXBLOCKSHIFT - SPA_MINBLOCKSHIFT + 1)
93 * Size of block to hold the configuration data (a packed nvlist)
95 #define SPA_CONFIG_BLOCKSIZE (1 << 14)
98 * The DVA size encodings for LSIZE and PSIZE support blocks up to 32MB.
99 * The ASIZE encoding should be at least 64 times larger (6 more bits)
100 * to support up to 4-way RAID-Z mirror mode with worst-case gang block
101 * overhead, three DVAs per bp, plus one more bit in case we do anything
102 * else that expands the ASIZE.
104 #define SPA_LSIZEBITS 16 /* LSIZE up to 32M (2^16 * 512) */
105 #define SPA_PSIZEBITS 16 /* PSIZE up to 32M (2^16 * 512) */
106 #define SPA_ASIZEBITS 24 /* ASIZE up to 64 times larger */
109 * All SPA data is represented by 128-bit data virtual addresses (DVAs).
110 * The members of the dva_t should be considered opaque outside the SPA.
113 uint64_t dva_word
[2];
117 * Each block has a 256-bit checksum -- strong enough for cryptographic hashes.
119 typedef struct zio_cksum
{
124 * Each block is described by its DVAs, time of birth, checksum, etc.
125 * The word-by-word, bit-by-bit layout of the blkptr is as follows:
127 * 64 56 48 40 32 24 16 8 0
128 * +-------+-------+-------+-------+-------+-------+-------+-------+
129 * 0 | vdev1 | GRID | ASIZE |
130 * +-------+-------+-------+-------+-------+-------+-------+-------+
132 * +-------+-------+-------+-------+-------+-------+-------+-------+
133 * 2 | vdev2 | GRID | ASIZE |
134 * +-------+-------+-------+-------+-------+-------+-------+-------+
136 * +-------+-------+-------+-------+-------+-------+-------+-------+
137 * 4 | vdev3 | GRID | ASIZE |
138 * +-------+-------+-------+-------+-------+-------+-------+-------+
140 * +-------+-------+-------+-------+-------+-------+-------+-------+
141 * 6 |BDX|lvl| type | cksum | comp | PSIZE | LSIZE |
142 * +-------+-------+-------+-------+-------+-------+-------+-------+
144 * +-------+-------+-------+-------+-------+-------+-------+-------+
146 * +-------+-------+-------+-------+-------+-------+-------+-------+
147 * 9 | physical birth txg |
148 * +-------+-------+-------+-------+-------+-------+-------+-------+
149 * a | logical birth txg |
150 * +-------+-------+-------+-------+-------+-------+-------+-------+
152 * +-------+-------+-------+-------+-------+-------+-------+-------+
154 * +-------+-------+-------+-------+-------+-------+-------+-------+
156 * +-------+-------+-------+-------+-------+-------+-------+-------+
158 * +-------+-------+-------+-------+-------+-------+-------+-------+
160 * +-------+-------+-------+-------+-------+-------+-------+-------+
164 * vdev virtual device ID
165 * offset offset into virtual device
167 * PSIZE physical size (after compression)
168 * ASIZE allocated size (including RAID-Z parity and gang block headers)
169 * GRID RAID-Z layout information (reserved for future use)
170 * cksum checksum function
171 * comp compression function
172 * G gang block indicator
173 * B byteorder (endianness)
176 * lvl level of indirection
177 * type DMU object type
178 * phys birth txg of block allocation; zero if same as logical birth txg
179 * log. birth transaction group in which the block was logically born
180 * fill count number of non-zero blocks under this bp
181 * checksum[4] 256-bit checksum of the data this bp describes
183 #define SPA_BLKPTRSHIFT 7 /* blkptr_t is 128 bytes */
184 #define SPA_DVAS_PER_BP 3 /* Number of DVAs in a bp */
186 typedef struct blkptr
{
187 dva_t blk_dva
[SPA_DVAS_PER_BP
]; /* Data Virtual Addresses */
188 uint64_t blk_prop
; /* size, compression, type, etc */
189 uint64_t blk_pad
[2]; /* Extra space for the future */
190 uint64_t blk_phys_birth
; /* txg when block was allocated */
191 uint64_t blk_birth
; /* transaction group at birth */
192 uint64_t blk_fill
; /* fill count */
193 zio_cksum_t blk_cksum
; /* 256-bit checksum */
197 * Macros to get and set fields in a bp or DVA.
199 #define DVA_GET_ASIZE(dva) \
200 BF64_GET_SB((dva)->dva_word[0], 0, 24, SPA_MINBLOCKSHIFT, 0)
201 #define DVA_SET_ASIZE(dva, x) \
202 BF64_SET_SB((dva)->dva_word[0], 0, 24, SPA_MINBLOCKSHIFT, 0, x)
204 #define DVA_GET_GRID(dva) BF64_GET((dva)->dva_word[0], 24, 8)
205 #define DVA_SET_GRID(dva, x) BF64_SET((dva)->dva_word[0], 24, 8, x)
207 #define DVA_GET_VDEV(dva) BF64_GET((dva)->dva_word[0], 32, 32)
208 #define DVA_SET_VDEV(dva, x) BF64_SET((dva)->dva_word[0], 32, 32, x)
210 #define DVA_GET_OFFSET(dva) \
211 BF64_GET_SB((dva)->dva_word[1], 0, 63, SPA_MINBLOCKSHIFT, 0)
212 #define DVA_SET_OFFSET(dva, x) \
213 BF64_SET_SB((dva)->dva_word[1], 0, 63, SPA_MINBLOCKSHIFT, 0, x)
215 #define DVA_GET_GANG(dva) BF64_GET((dva)->dva_word[1], 63, 1)
216 #define DVA_SET_GANG(dva, x) BF64_SET((dva)->dva_word[1], 63, 1, x)
218 #define BP_GET_LSIZE(bp) \
219 BF64_GET_SB((bp)->blk_prop, 0, 16, SPA_MINBLOCKSHIFT, 1)
220 #define BP_SET_LSIZE(bp, x) \
221 BF64_SET_SB((bp)->blk_prop, 0, 16, SPA_MINBLOCKSHIFT, 1, x)
223 #define BP_GET_PSIZE(bp) \
224 BF64_GET_SB((bp)->blk_prop, 16, 16, SPA_MINBLOCKSHIFT, 1)
225 #define BP_SET_PSIZE(bp, x) \
226 BF64_SET_SB((bp)->blk_prop, 16, 16, SPA_MINBLOCKSHIFT, 1, x)
228 #define BP_GET_COMPRESS(bp) BF64_GET((bp)->blk_prop, 32, 8)
229 #define BP_SET_COMPRESS(bp, x) BF64_SET((bp)->blk_prop, 32, 8, x)
231 #define BP_GET_CHECKSUM(bp) BF64_GET((bp)->blk_prop, 40, 8)
232 #define BP_SET_CHECKSUM(bp, x) BF64_SET((bp)->blk_prop, 40, 8, x)
234 #define BP_GET_TYPE(bp) BF64_GET((bp)->blk_prop, 48, 8)
235 #define BP_SET_TYPE(bp, x) BF64_SET((bp)->blk_prop, 48, 8, x)
237 #define BP_GET_LEVEL(bp) BF64_GET((bp)->blk_prop, 56, 5)
238 #define BP_SET_LEVEL(bp, x) BF64_SET((bp)->blk_prop, 56, 5, x)
240 #define BP_GET_PROP_BIT_61(bp) BF64_GET((bp)->blk_prop, 61, 1)
241 #define BP_SET_PROP_BIT_61(bp, x) BF64_SET((bp)->blk_prop, 61, 1, x)
243 #define BP_GET_DEDUP(bp) BF64_GET((bp)->blk_prop, 62, 1)
244 #define BP_SET_DEDUP(bp, x) BF64_SET((bp)->blk_prop, 62, 1, x)
246 #define BP_GET_BYTEORDER(bp) (0 - BF64_GET((bp)->blk_prop, 63, 1))
247 #define BP_SET_BYTEORDER(bp, x) BF64_SET((bp)->blk_prop, 63, 1, x)
249 #define BP_PHYSICAL_BIRTH(bp) \
250 ((bp)->blk_phys_birth ? (bp)->blk_phys_birth : (bp)->blk_birth)
252 #define BP_SET_BIRTH(bp, logical, physical) \
254 (bp)->blk_birth = (logical); \
255 (bp)->blk_phys_birth = ((logical) == (physical) ? 0 : (physical)); \
258 #define BP_GET_ASIZE(bp) \
259 (DVA_GET_ASIZE(&(bp)->blk_dva[0]) + DVA_GET_ASIZE(&(bp)->blk_dva[1]) + \
260 DVA_GET_ASIZE(&(bp)->blk_dva[2]))
262 #define BP_GET_UCSIZE(bp) \
263 ((BP_GET_LEVEL(bp) > 0 || dmu_ot[BP_GET_TYPE(bp)].ot_metadata) ? \
264 BP_GET_PSIZE(bp) : BP_GET_LSIZE(bp))
266 #define BP_GET_NDVAS(bp) \
267 (!!DVA_GET_ASIZE(&(bp)->blk_dva[0]) + \
268 !!DVA_GET_ASIZE(&(bp)->blk_dva[1]) + \
269 !!DVA_GET_ASIZE(&(bp)->blk_dva[2]))
271 #define BP_COUNT_GANG(bp) \
272 (DVA_GET_GANG(&(bp)->blk_dva[0]) + \
273 DVA_GET_GANG(&(bp)->blk_dva[1]) + \
274 DVA_GET_GANG(&(bp)->blk_dva[2]))
276 #define DVA_EQUAL(dva1, dva2) \
277 ((dva1)->dva_word[1] == (dva2)->dva_word[1] && \
278 (dva1)->dva_word[0] == (dva2)->dva_word[0])
280 #define BP_EQUAL(bp1, bp2) \
281 (BP_PHYSICAL_BIRTH(bp1) == BP_PHYSICAL_BIRTH(bp2) && \
282 DVA_EQUAL(&(bp1)->blk_dva[0], &(bp2)->blk_dva[0]) && \
283 DVA_EQUAL(&(bp1)->blk_dva[1], &(bp2)->blk_dva[1]) && \
284 DVA_EQUAL(&(bp1)->blk_dva[2], &(bp2)->blk_dva[2]))
286 #define ZIO_CHECKSUM_EQUAL(zc1, zc2) \
287 (0 == (((zc1).zc_word[0] - (zc2).zc_word[0]) | \
288 ((zc1).zc_word[1] - (zc2).zc_word[1]) | \
289 ((zc1).zc_word[2] - (zc2).zc_word[2]) | \
290 ((zc1).zc_word[3] - (zc2).zc_word[3])))
292 #define DVA_IS_VALID(dva) (DVA_GET_ASIZE(dva) != 0)
294 #define ZIO_SET_CHECKSUM(zcp, w0, w1, w2, w3) \
296 (zcp)->zc_word[0] = w0; \
297 (zcp)->zc_word[1] = w1; \
298 (zcp)->zc_word[2] = w2; \
299 (zcp)->zc_word[3] = w3; \
302 #define BP_IDENTITY(bp) (&(bp)->blk_dva[0])
303 #define BP_IS_GANG(bp) DVA_GET_GANG(BP_IDENTITY(bp))
304 #define BP_IS_HOLE(bp) ((bp)->blk_birth == 0)
306 /* BP_IS_RAIDZ(bp) assumes no block compression */
307 #define BP_IS_RAIDZ(bp) (DVA_GET_ASIZE(&(bp)->blk_dva[0]) > \
310 #define BP_ZERO(bp) \
312 (bp)->blk_dva[0].dva_word[0] = 0; \
313 (bp)->blk_dva[0].dva_word[1] = 0; \
314 (bp)->blk_dva[1].dva_word[0] = 0; \
315 (bp)->blk_dva[1].dva_word[1] = 0; \
316 (bp)->blk_dva[2].dva_word[0] = 0; \
317 (bp)->blk_dva[2].dva_word[1] = 0; \
318 (bp)->blk_prop = 0; \
319 (bp)->blk_pad[0] = 0; \
320 (bp)->blk_pad[1] = 0; \
321 (bp)->blk_phys_birth = 0; \
322 (bp)->blk_birth = 0; \
323 (bp)->blk_fill = 0; \
324 ZIO_SET_CHECKSUM(&(bp)->blk_cksum, 0, 0, 0, 0); \
328 * Note: the byteorder is either 0 or -1, both of which are palindromes.
329 * This simplifies the endianness handling a bit.
332 #define ZFS_HOST_BYTEORDER (0ULL)
334 #define ZFS_HOST_BYTEORDER (-1ULL)
337 #define BP_SHOULD_BYTESWAP(bp) (BP_GET_BYTEORDER(bp) != ZFS_HOST_BYTEORDER)
339 #define BP_SPRINTF_LEN 320
342 * This macro allows code sharing between zfs, libzpool, and mdb.
343 * 'func' is either snprintf() or mdb_snprintf().
344 * 'ws' (whitespace) can be ' ' for single-line format, '\n' for multi-line.
346 #define SPRINTF_BLKPTR(func, ws, buf, bp, type, checksum, compress) \
348 static const char *copyname[] = \
349 { "zero", "single", "double", "triple" }; \
350 int size = BP_SPRINTF_LEN; \
356 len = func(buf + len, size - len, "<NULL>"); \
357 } else if (BP_IS_HOLE(bp)) { \
358 len = func(buf + len, size - len, "<hole>"); \
360 for (d = 0; d < BP_GET_NDVAS(bp); d++) { \
361 const dva_t *dva = &bp->blk_dva[d]; \
362 if (DVA_IS_VALID(dva)) \
364 len += func(buf + len, size - len, \
365 "DVA[%d]=<%llu:%llx:%llx>%c", d, \
366 (u_longlong_t)DVA_GET_VDEV(dva), \
367 (u_longlong_t)DVA_GET_OFFSET(dva), \
368 (u_longlong_t)DVA_GET_ASIZE(dva), \
371 if (BP_IS_GANG(bp) && \
372 DVA_GET_ASIZE(&bp->blk_dva[2]) <= \
373 DVA_GET_ASIZE(&bp->blk_dva[1]) / 2) \
375 len += func(buf + len, size - len, \
376 "[L%llu %s] %s %s %s %s %s %s%c" \
377 "size=%llxL/%llxP birth=%lluL/%lluP fill=%llu%c" \
378 "cksum=%llx:%llx:%llx:%llx", \
379 (u_longlong_t)BP_GET_LEVEL(bp), \
383 BP_GET_BYTEORDER(bp) == 0 ? "BE" : "LE", \
384 BP_IS_GANG(bp) ? "gang" : "contiguous", \
385 BP_GET_DEDUP(bp) ? "dedup" : "unique", \
388 (u_longlong_t)BP_GET_LSIZE(bp), \
389 (u_longlong_t)BP_GET_PSIZE(bp), \
390 (u_longlong_t)bp->blk_birth, \
391 (u_longlong_t)BP_PHYSICAL_BIRTH(bp), \
392 (u_longlong_t)bp->blk_fill, \
394 (u_longlong_t)bp->blk_cksum.zc_word[0], \
395 (u_longlong_t)bp->blk_cksum.zc_word[1], \
396 (u_longlong_t)bp->blk_cksum.zc_word[2], \
397 (u_longlong_t)bp->blk_cksum.zc_word[3]); \
399 ASSERT(len < size); \
404 #define BP_GET_BUFC_TYPE(bp) \
405 (((BP_GET_LEVEL(bp) > 0) || (dmu_ot[BP_GET_TYPE(bp)].ot_metadata)) ? \
406 ARC_BUFC_METADATA : ARC_BUFC_DATA);
408 typedef enum spa_import_type
{
413 /* state manipulation functions */
414 extern int spa_open(const char *pool
, spa_t
**, void *tag
);
415 extern int spa_open_rewind(const char *pool
, spa_t
**, void *tag
,
416 nvlist_t
*policy
, nvlist_t
**config
);
417 extern int spa_get_stats(const char *pool
, nvlist_t
**config
,
418 char *altroot
, size_t buflen
);
419 extern int spa_create(const char *pool
, nvlist_t
*config
, nvlist_t
*props
,
420 const char *history_str
, nvlist_t
*zplprops
);
421 extern int spa_import_rootpool(char *devpath
, char *devid
);
422 extern int spa_import(const char *pool
, nvlist_t
*config
, nvlist_t
*props
,
424 extern nvlist_t
*spa_tryimport(nvlist_t
*tryconfig
);
425 extern int spa_destroy(char *pool
);
426 extern int spa_export(char *pool
, nvlist_t
**oldconfig
, boolean_t force
,
427 boolean_t hardforce
);
428 extern int spa_reset(char *pool
);
429 extern void spa_async_request(spa_t
*spa
, int flag
);
430 extern void spa_async_unrequest(spa_t
*spa
, int flag
);
431 extern void spa_async_suspend(spa_t
*spa
);
432 extern void spa_async_resume(spa_t
*spa
);
433 extern spa_t
*spa_inject_addref(char *pool
);
434 extern void spa_inject_delref(spa_t
*spa
);
435 extern void spa_scan_stat_init(spa_t
*spa
);
436 extern int spa_scan_get_stats(spa_t
*spa
, pool_scan_stat_t
*ps
);
438 #define SPA_ASYNC_CONFIG_UPDATE 0x01
439 #define SPA_ASYNC_REMOVE 0x02
440 #define SPA_ASYNC_PROBE 0x04
441 #define SPA_ASYNC_RESILVER_DONE 0x08
442 #define SPA_ASYNC_RESILVER 0x10
443 #define SPA_ASYNC_AUTOEXPAND 0x20
444 #define SPA_ASYNC_REMOVE_DONE 0x40
445 #define SPA_ASYNC_REMOVE_STOP 0x80
448 * Controls the behavior of spa_vdev_remove().
450 #define SPA_REMOVE_UNSPARE 0x01
451 #define SPA_REMOVE_DONE 0x02
453 /* device manipulation */
454 extern int spa_vdev_add(spa_t
*spa
, nvlist_t
*nvroot
);
455 extern int spa_vdev_attach(spa_t
*spa
, uint64_t guid
, nvlist_t
*nvroot
,
457 extern int spa_vdev_detach(spa_t
*spa
, uint64_t guid
, uint64_t pguid
,
459 extern int spa_vdev_remove(spa_t
*spa
, uint64_t guid
, boolean_t unspare
);
460 extern boolean_t
spa_vdev_remove_active(spa_t
*spa
);
461 extern int spa_vdev_setpath(spa_t
*spa
, uint64_t guid
, const char *newpath
);
462 extern int spa_vdev_setfru(spa_t
*spa
, uint64_t guid
, const char *newfru
);
463 extern int spa_vdev_split_mirror(spa_t
*spa
, char *newname
, nvlist_t
*config
,
464 nvlist_t
*props
, boolean_t exp
);
466 /* spare state (which is global across all pools) */
467 extern void spa_spare_add(vdev_t
*vd
);
468 extern void spa_spare_remove(vdev_t
*vd
);
469 extern boolean_t
spa_spare_exists(uint64_t guid
, uint64_t *pool
, int *refcnt
);
470 extern void spa_spare_activate(vdev_t
*vd
);
472 /* L2ARC state (which is global across all pools) */
473 extern void spa_l2cache_add(vdev_t
*vd
);
474 extern void spa_l2cache_remove(vdev_t
*vd
);
475 extern boolean_t
spa_l2cache_exists(uint64_t guid
, uint64_t *pool
);
476 extern void spa_l2cache_activate(vdev_t
*vd
);
477 extern void spa_l2cache_drop(spa_t
*spa
);
480 extern int spa_scan(spa_t
*spa
, pool_scan_func_t func
);
481 extern int spa_scan_stop(spa_t
*spa
);
484 extern void spa_sync(spa_t
*spa
, uint64_t txg
); /* only for DMU use */
485 extern void spa_sync_allpools(void);
488 * DEFERRED_FREE must be large enough that regular blocks are not
489 * deferred. XXX so can't we change it back to 1?
491 #define SYNC_PASS_DEFERRED_FREE 2 /* defer frees after this pass */
492 #define SYNC_PASS_DONT_COMPRESS 4 /* don't compress after this pass */
493 #define SYNC_PASS_REWRITE 1 /* rewrite new bps after this pass */
495 /* spa namespace global mutex */
496 extern kmutex_t spa_namespace_lock
;
499 * SPA configuration functions in spa_config.c
502 #define SPA_CONFIG_UPDATE_POOL 0
503 #define SPA_CONFIG_UPDATE_VDEVS 1
505 extern void spa_config_sync(spa_t
*, boolean_t
, boolean_t
);
506 extern void spa_config_load(void);
507 extern nvlist_t
*spa_all_configs(uint64_t *);
508 extern void spa_config_set(spa_t
*spa
, nvlist_t
*config
);
509 extern nvlist_t
*spa_config_generate(spa_t
*spa
, vdev_t
*vd
, uint64_t txg
,
511 extern void spa_config_update(spa_t
*spa
, int what
);
514 * Miscellaneous SPA routines in spa_misc.c
517 /* Namespace manipulation */
518 extern spa_t
*spa_lookup(const char *name
);
519 extern spa_t
*spa_add(const char *name
, nvlist_t
*config
, const char *altroot
);
520 extern void spa_remove(spa_t
*spa
);
521 extern spa_t
*spa_next(spa_t
*prev
);
523 /* Refcount functions */
524 extern void spa_open_ref(spa_t
*spa
, void *tag
);
525 extern void spa_close(spa_t
*spa
, void *tag
);
526 extern boolean_t
spa_refcount_zero(spa_t
*spa
);
528 #define SCL_NONE 0x00
529 #define SCL_CONFIG 0x01
530 #define SCL_STATE 0x02
531 #define SCL_L2ARC 0x04 /* hack until L2ARC 2.0 */
532 #define SCL_ALLOC 0x08
534 #define SCL_FREE 0x20
535 #define SCL_VDEV 0x40
537 #define SCL_ALL ((1 << SCL_LOCKS) - 1)
538 #define SCL_STATE_ALL (SCL_STATE | SCL_L2ARC | SCL_ZIO)
540 /* Pool configuration locks */
541 extern int spa_config_tryenter(spa_t
*spa
, int locks
, void *tag
, krw_t rw
);
542 extern void spa_config_enter(spa_t
*spa
, int locks
, void *tag
, krw_t rw
);
543 extern void spa_config_exit(spa_t
*spa
, int locks
, void *tag
);
544 extern int spa_config_held(spa_t
*spa
, int locks
, krw_t rw
);
546 /* Pool vdev add/remove lock */
547 extern uint64_t spa_vdev_enter(spa_t
*spa
);
548 extern uint64_t spa_vdev_config_enter(spa_t
*spa
);
549 extern void spa_vdev_config_exit(spa_t
*spa
, vdev_t
*vd
, uint64_t txg
,
550 int error
, char *tag
);
551 extern int spa_vdev_exit(spa_t
*spa
, vdev_t
*vd
, uint64_t txg
, int error
);
553 /* Pool vdev state change lock */
554 extern void spa_vdev_state_enter(spa_t
*spa
, int oplock
);
555 extern int spa_vdev_state_exit(spa_t
*spa
, vdev_t
*vd
, int error
);
558 typedef enum spa_log_state
{
559 SPA_LOG_UNKNOWN
= 0, /* unknown log state */
560 SPA_LOG_MISSING
, /* missing log(s) */
561 SPA_LOG_CLEAR
, /* clear the log(s) */
562 SPA_LOG_GOOD
, /* log(s) are good */
565 extern spa_log_state_t
spa_get_log_state(spa_t
*spa
);
566 extern void spa_set_log_state(spa_t
*spa
, spa_log_state_t state
);
567 extern int spa_offline_log(spa_t
*spa
);
569 /* Log claim callback */
570 extern void spa_claim_notify(zio_t
*zio
);
572 /* Accessor functions */
573 extern boolean_t
spa_shutting_down(spa_t
*spa
);
574 extern struct dsl_pool
*spa_get_dsl(spa_t
*spa
);
575 extern blkptr_t
*spa_get_rootblkptr(spa_t
*spa
);
576 extern void spa_set_rootblkptr(spa_t
*spa
, const blkptr_t
*bp
);
577 extern void spa_altroot(spa_t
*, char *, size_t);
578 extern int spa_sync_pass(spa_t
*spa
);
579 extern char *spa_name(spa_t
*spa
);
580 extern uint64_t spa_guid(spa_t
*spa
);
581 extern uint64_t spa_last_synced_txg(spa_t
*spa
);
582 extern uint64_t spa_first_txg(spa_t
*spa
);
583 extern uint64_t spa_syncing_txg(spa_t
*spa
);
584 extern uint64_t spa_version(spa_t
*spa
);
585 extern pool_state_t
spa_state(spa_t
*spa
);
586 extern spa_load_state_t
spa_load_state(spa_t
*spa
);
587 extern uint64_t spa_freeze_txg(spa_t
*spa
);
588 extern uint64_t spa_get_asize(spa_t
*spa
, uint64_t lsize
);
589 extern uint64_t spa_get_dspace(spa_t
*spa
);
590 extern void spa_update_dspace(spa_t
*spa
);
591 extern uint64_t spa_version(spa_t
*spa
);
592 extern boolean_t
spa_deflate(spa_t
*spa
);
593 extern metaslab_class_t
*spa_normal_class(spa_t
*spa
);
594 extern metaslab_class_t
*spa_log_class(spa_t
*spa
);
595 extern int spa_max_replication(spa_t
*spa
);
596 extern int spa_prev_software_version(spa_t
*spa
);
597 extern int spa_busy(void);
598 extern uint8_t spa_get_failmode(spa_t
*spa
);
599 extern boolean_t
spa_suspended(spa_t
*spa
);
600 extern uint64_t spa_bootfs(spa_t
*spa
);
601 extern uint64_t spa_delegation(spa_t
*spa
);
602 extern objset_t
*spa_meta_objset(spa_t
*spa
);
604 /* Miscellaneous support routines */
605 extern int spa_rename(const char *oldname
, const char *newname
);
606 extern spa_t
*spa_by_guid(uint64_t pool_guid
, uint64_t device_guid
);
607 extern boolean_t
spa_guid_exists(uint64_t pool_guid
, uint64_t device_guid
);
608 extern char *spa_strdup(const char *);
609 extern void spa_strfree(char *);
610 extern uint64_t spa_get_random(uint64_t range
);
611 extern uint64_t spa_generate_guid(spa_t
*spa
);
612 extern void sprintf_blkptr(char *buf
, const blkptr_t
*bp
);
613 extern void spa_freeze(spa_t
*spa
);
614 extern void spa_upgrade(spa_t
*spa
, uint64_t version
);
615 extern void spa_evict_all(void);
616 extern vdev_t
*spa_lookup_by_guid(spa_t
*spa
, uint64_t guid
,
618 extern boolean_t
spa_has_spare(spa_t
*, uint64_t guid
);
619 extern uint64_t dva_get_dsize_sync(spa_t
*spa
, const dva_t
*dva
);
620 extern uint64_t bp_get_dsize_sync(spa_t
*spa
, const blkptr_t
*bp
);
621 extern uint64_t bp_get_dsize(spa_t
*spa
, const blkptr_t
*bp
);
622 extern boolean_t
spa_has_slogs(spa_t
*spa
);
623 extern boolean_t
spa_is_root(spa_t
*spa
);
624 extern boolean_t
spa_writeable(spa_t
*spa
);
626 extern int spa_mode(spa_t
*spa
);
627 extern uint64_t strtonum(const char *str
, char **nptr
);
629 /* history logging */
630 typedef enum history_log_type
{
634 } history_log_type_t
;
636 typedef struct history_arg
{
637 char *ha_history_str
;
638 history_log_type_t ha_log_type
;
639 history_internal_events_t ha_event
;
644 extern char *spa_his_ievent_table
[];
646 extern void spa_history_create_obj(spa_t
*spa
, dmu_tx_t
*tx
);
647 extern int spa_history_get(spa_t
*spa
, uint64_t *offset
, uint64_t *len_read
,
649 extern int spa_history_log(spa_t
*spa
, const char *his_buf
,
650 history_log_type_t what
);
651 extern void spa_history_log_internal(history_internal_events_t event
,
652 spa_t
*spa
, dmu_tx_t
*tx
, const char *fmt
, ...);
653 extern void spa_history_log_version(spa_t
*spa
, history_internal_events_t evt
);
657 extern void spa_log_error(spa_t
*spa
, zio_t
*zio
);
658 extern void zfs_ereport_post(const char *class, spa_t
*spa
, vdev_t
*vd
,
659 zio_t
*zio
, uint64_t stateoroffset
, uint64_t length
);
660 extern void zfs_post_remove(spa_t
*spa
, vdev_t
*vd
);
661 extern void zfs_post_state_change(spa_t
*spa
, vdev_t
*vd
);
662 extern void zfs_post_autoreplace(spa_t
*spa
, vdev_t
*vd
);
663 extern uint64_t spa_get_errlog_size(spa_t
*spa
);
664 extern int spa_get_errlog(spa_t
*spa
, void *uaddr
, size_t *count
);
665 extern void spa_errlog_rotate(spa_t
*spa
);
666 extern void spa_errlog_drain(spa_t
*spa
);
667 extern void spa_errlog_sync(spa_t
*spa
, uint64_t txg
);
668 extern void spa_get_errlists(spa_t
*spa
, avl_tree_t
*last
, avl_tree_t
*scrub
);
671 extern void vdev_cache_stat_init(void);
672 extern void vdev_cache_stat_fini(void);
674 /* Initialization and termination */
675 extern void spa_init(int flags
);
676 extern void spa_fini(void);
677 extern void spa_boot_init();
680 extern int spa_prop_set(spa_t
*spa
, nvlist_t
*nvp
);
681 extern int spa_prop_get(spa_t
*spa
, nvlist_t
**nvp
);
682 extern void spa_prop_clear_bootfs(spa_t
*spa
, uint64_t obj
, dmu_tx_t
*tx
);
683 extern void spa_configfile_set(spa_t
*, nvlist_t
*, boolean_t
);
685 /* asynchronous event notification */
686 extern void spa_event_notify(spa_t
*spa
, vdev_t
*vdev
, const char *name
);
689 #define dprintf_bp(bp, fmt, ...) do { \
690 if (zfs_flags & ZFS_DEBUG_DPRINTF) { \
691 char *__blkbuf = kmem_alloc(BP_SPRINTF_LEN, KM_SLEEP); \
692 sprintf_blkptr(__blkbuf, (bp)); \
693 dprintf(fmt " %s\n", __VA_ARGS__, __blkbuf); \
694 kmem_free(__blkbuf, BP_SPRINTF_LEN); \
696 _NOTE(CONSTCOND) } while (0)
698 #define dprintf_bp(bp, fmt, ...)
701 extern int spa_mode_global
; /* mode, e.g. FREAD | FWRITE */
707 #endif /* _SYS_SPA_H */