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) 2012 by Delphix. All rights reserved.
24 * Copyright 2011 Nexenta Systems, Inc. All rights reserved.
31 #include <sys/zfs_context.h>
32 #include <sys/nvpair.h>
33 #include <sys/sysmacros.h>
34 #include <sys/types.h>
35 #include <sys/fs/zfs.h>
42 * Forward references that lots of things need.
44 typedef struct spa spa_t;
45 typedef struct vdev vdev_t;
46 typedef struct metaslab metaslab_t;
47 typedef struct metaslab_group metaslab_group_t;
48 typedef struct metaslab_class metaslab_class_t;
49 typedef struct zio zio_t;
50 typedef struct zilog zilog_t;
51 typedef struct spa_aux_vdev spa_aux_vdev_t;
52 typedef struct ddt ddt_t;
53 typedef struct ddt_entry ddt_entry_t;
58 * General-purpose 32-bit and 64-bit bitfield encodings.
60 #define BF32_DECODE(x, low, len) P2PHASE((x) >> (low), 1U << (len))
61 #define BF64_DECODE(x, low, len) P2PHASE((x) >> (low), 1ULL << (len))
62 #define BF32_ENCODE(x, low, len) (P2PHASE((x), 1U << (len)) << (low))
63 #define BF64_ENCODE(x, low, len) (P2PHASE((x), 1ULL << (len)) << (low))
65 #define BF32_GET(x, low, len) BF32_DECODE(x, low, len)
66 #define BF64_GET(x, low, len) BF64_DECODE(x, low, len)
68 #define BF32_SET(x, low, len, val) \
69 ((x) ^= BF32_ENCODE((x >> low) ^ (val), low, len))
70 #define BF64_SET(x, low, len, val) \
71 ((x) ^= BF64_ENCODE((x >> low) ^ (val), low, len))
73 #define BF32_GET_SB(x, low, len, shift, bias) \
74 ((BF32_GET(x, low, len) + (bias)) << (shift))
75 #define BF64_GET_SB(x, low, len, shift, bias) \
76 ((BF64_GET(x, low, len) + (bias)) << (shift))
78 #define BF32_SET_SB(x, low, len, shift, bias, val) \
79 BF32_SET(x, low, len, ((val) >> (shift)) - (bias))
80 #define BF64_SET_SB(x, low, len, shift, bias, val) \
81 BF64_SET(x, low, len, ((val) >> (shift)) - (bias))
84 * We currently support nine block sizes, from 512 bytes to 128K.
85 * We could go higher, but the benefits are near-zero and the cost
86 * of COWing a giant block to modify one byte would become excessive.
88 #define SPA_MINBLOCKSHIFT 9
89 #define SPA_MAXBLOCKSHIFT 17
90 #define SPA_MINBLOCKSIZE (1ULL << SPA_MINBLOCKSHIFT)
91 #define SPA_MAXBLOCKSIZE (1ULL << SPA_MAXBLOCKSHIFT)
93 #define SPA_BLOCKSIZES (SPA_MAXBLOCKSHIFT - SPA_MINBLOCKSHIFT + 1)
96 * Maximum supported logical ashift.
98 * The current 8k allocation block size limit is due to the 8k
99 * aligned/sized operations performed by vdev_probe() on
100 * vdev_label->vl_pad2. Using another "safe region" for these tests
101 * would allow the limit to be raised to 16k, at the expense of
102 * only having 8 available uberblocks in the label area.
104 #define SPA_MAXASHIFT 13
107 * Size of block to hold the configuration data (a packed nvlist)
109 #define SPA_CONFIG_BLOCKSIZE (1ULL << 14)
112 * The DVA size encodings for LSIZE and PSIZE support blocks up to 32MB.
113 * The ASIZE encoding should be at least 64 times larger (6 more bits)
114 * to support up to 4-way RAID-Z mirror mode with worst-case gang block
115 * overhead, three DVAs per bp, plus one more bit in case we do anything
116 * else that expands the ASIZE.
118 #define SPA_LSIZEBITS 16 /* LSIZE up to 32M (2^16 * 512) */
119 #define SPA_PSIZEBITS 16 /* PSIZE up to 32M (2^16 * 512) */
120 #define SPA_ASIZEBITS 24 /* ASIZE up to 64 times larger */
123 * All SPA data is represented by 128-bit data virtual addresses (DVAs).
124 * The members of the dva_t should be considered opaque outside the SPA.
127 uint64_t dva_word[2];
131 * Each block has a 256-bit checksum -- strong enough for cryptographic hashes.
133 typedef struct zio_cksum {
138 * Each block is described by its DVAs, time of birth, checksum, etc.
139 * The word-by-word, bit-by-bit layout of the blkptr is as follows:
141 * 64 56 48 40 32 24 16 8 0
142 * +-------+-------+-------+-------+-------+-------+-------+-------+
143 * 0 | vdev1 | GRID | ASIZE |
144 * +-------+-------+-------+-------+-------+-------+-------+-------+
146 * +-------+-------+-------+-------+-------+-------+-------+-------+
147 * 2 | vdev2 | GRID | ASIZE |
148 * +-------+-------+-------+-------+-------+-------+-------+-------+
150 * +-------+-------+-------+-------+-------+-------+-------+-------+
151 * 4 | vdev3 | GRID | ASIZE |
152 * +-------+-------+-------+-------+-------+-------+-------+-------+
154 * +-------+-------+-------+-------+-------+-------+-------+-------+
155 * 6 |BDX|lvl| type | cksum | comp | PSIZE | LSIZE |
156 * +-------+-------+-------+-------+-------+-------+-------+-------+
158 * +-------+-------+-------+-------+-------+-------+-------+-------+
160 * +-------+-------+-------+-------+-------+-------+-------+-------+
161 * 9 | physical birth txg |
162 * +-------+-------+-------+-------+-------+-------+-------+-------+
163 * a | logical birth txg |
164 * +-------+-------+-------+-------+-------+-------+-------+-------+
166 * +-------+-------+-------+-------+-------+-------+-------+-------+
168 * +-------+-------+-------+-------+-------+-------+-------+-------+
170 * +-------+-------+-------+-------+-------+-------+-------+-------+
172 * +-------+-------+-------+-------+-------+-------+-------+-------+
174 * +-------+-------+-------+-------+-------+-------+-------+-------+
178 * vdev virtual device ID
179 * offset offset into virtual device
181 * PSIZE physical size (after compression)
182 * ASIZE allocated size (including RAID-Z parity and gang block headers)
183 * GRID RAID-Z layout information (reserved for future use)
184 * cksum checksum function
185 * comp compression function
186 * G gang block indicator
187 * B byteorder (endianness)
190 * lvl level of indirection
191 * type DMU object type
192 * phys birth txg of block allocation; zero if same as logical birth txg
193 * log. birth transaction group in which the block was logically born
194 * fill count number of non-zero blocks under this bp
195 * checksum[4] 256-bit checksum of the data this bp describes
197 #define SPA_BLKPTRSHIFT 7 /* blkptr_t is 128 bytes */
198 #define SPA_DVAS_PER_BP 3 /* Number of DVAs in a bp */
200 typedef struct blkptr {
201 dva_t blk_dva[SPA_DVAS_PER_BP]; /* Data Virtual Addresses */
202 uint64_t blk_prop; /* size, compression, type, etc */
203 uint64_t blk_pad[2]; /* Extra space for the future */
204 uint64_t blk_phys_birth; /* txg when block was allocated */
205 uint64_t blk_birth; /* transaction group at birth */
206 uint64_t blk_fill; /* fill count */
207 zio_cksum_t blk_cksum; /* 256-bit checksum */
211 * Macros to get and set fields in a bp or DVA.
213 #define DVA_GET_ASIZE(dva) \
214 BF64_GET_SB((dva)->dva_word[0], 0, 24, SPA_MINBLOCKSHIFT, 0)
215 #define DVA_SET_ASIZE(dva, x) \
216 BF64_SET_SB((dva)->dva_word[0], 0, 24, SPA_MINBLOCKSHIFT, 0, x)
218 #define DVA_GET_GRID(dva) BF64_GET((dva)->dva_word[0], 24, 8)
219 #define DVA_SET_GRID(dva, x) BF64_SET((dva)->dva_word[0], 24, 8, x)
221 #define DVA_GET_VDEV(dva) BF64_GET((dva)->dva_word[0], 32, 32)
222 #define DVA_SET_VDEV(dva, x) BF64_SET((dva)->dva_word[0], 32, 32, x)
224 #define DVA_GET_OFFSET(dva) \
225 BF64_GET_SB((dva)->dva_word[1], 0, 63, SPA_MINBLOCKSHIFT, 0)
226 #define DVA_SET_OFFSET(dva, x) \
227 BF64_SET_SB((dva)->dva_word[1], 0, 63, SPA_MINBLOCKSHIFT, 0, x)
229 #define DVA_GET_GANG(dva) BF64_GET((dva)->dva_word[1], 63, 1)
230 #define DVA_SET_GANG(dva, x) BF64_SET((dva)->dva_word[1], 63, 1, x)
232 #define BP_GET_LSIZE(bp) \
233 BF64_GET_SB((bp)->blk_prop, 0, 16, SPA_MINBLOCKSHIFT, 1)
234 #define BP_SET_LSIZE(bp, x) \
235 BF64_SET_SB((bp)->blk_prop, 0, 16, SPA_MINBLOCKSHIFT, 1, x)
237 #define BP_GET_PSIZE(bp) \
238 BF64_GET_SB((bp)->blk_prop, 16, 16, SPA_MINBLOCKSHIFT, 1)
239 #define BP_SET_PSIZE(bp, x) \
240 BF64_SET_SB((bp)->blk_prop, 16, 16, SPA_MINBLOCKSHIFT, 1, x)
242 #define BP_GET_COMPRESS(bp) BF64_GET((bp)->blk_prop, 32, 8)
243 #define BP_SET_COMPRESS(bp, x) BF64_SET((bp)->blk_prop, 32, 8, x)
245 #define BP_GET_CHECKSUM(bp) BF64_GET((bp)->blk_prop, 40, 8)
246 #define BP_SET_CHECKSUM(bp, x) BF64_SET((bp)->blk_prop, 40, 8, x)
248 #define BP_GET_TYPE(bp) BF64_GET((bp)->blk_prop, 48, 8)
249 #define BP_SET_TYPE(bp, x) BF64_SET((bp)->blk_prop, 48, 8, x)
251 #define BP_GET_LEVEL(bp) BF64_GET((bp)->blk_prop, 56, 5)
252 #define BP_SET_LEVEL(bp, x) BF64_SET((bp)->blk_prop, 56, 5, x)
254 #define BP_GET_PROP_BIT_61(bp) BF64_GET((bp)->blk_prop, 61, 1)
255 #define BP_SET_PROP_BIT_61(bp, x) BF64_SET((bp)->blk_prop, 61, 1, x)
257 #define BP_GET_DEDUP(bp) BF64_GET((bp)->blk_prop, 62, 1)
258 #define BP_SET_DEDUP(bp, x) BF64_SET((bp)->blk_prop, 62, 1, x)
260 #define BP_GET_BYTEORDER(bp) (0 - BF64_GET((bp)->blk_prop, 63, 1))
261 #define BP_SET_BYTEORDER(bp, x) BF64_SET((bp)->blk_prop, 63, 1, x)
263 #define BP_PHYSICAL_BIRTH(bp) \
264 ((bp)->blk_phys_birth ? (bp)->blk_phys_birth : (bp)->blk_birth)
266 #define BP_SET_BIRTH(bp, logical, physical) \
268 (bp)->blk_birth = (logical); \
269 (bp)->blk_phys_birth = ((logical) == (physical) ? 0 : (physical)); \
272 #define BP_GET_ASIZE(bp) \
273 (DVA_GET_ASIZE(&(bp)->blk_dva[0]) + DVA_GET_ASIZE(&(bp)->blk_dva[1]) + \
274 DVA_GET_ASIZE(&(bp)->blk_dva[2]))
276 #define BP_GET_UCSIZE(bp) \
277 ((BP_GET_LEVEL(bp) > 0 || DMU_OT_IS_METADATA(BP_GET_TYPE(bp))) ? \
278 BP_GET_PSIZE(bp) : BP_GET_LSIZE(bp))
280 #define BP_GET_NDVAS(bp) \
281 (!!DVA_GET_ASIZE(&(bp)->blk_dva[0]) + \
282 !!DVA_GET_ASIZE(&(bp)->blk_dva[1]) + \
283 !!DVA_GET_ASIZE(&(bp)->blk_dva[2]))
285 #define BP_COUNT_GANG(bp) \
286 (DVA_GET_GANG(&(bp)->blk_dva[0]) + \
287 DVA_GET_GANG(&(bp)->blk_dva[1]) + \
288 DVA_GET_GANG(&(bp)->blk_dva[2]))
290 #define DVA_EQUAL(dva1, dva2) \
291 ((dva1)->dva_word[1] == (dva2)->dva_word[1] && \
292 (dva1)->dva_word[0] == (dva2)->dva_word[0])
294 #define BP_EQUAL(bp1, bp2) \
295 (BP_PHYSICAL_BIRTH(bp1) == BP_PHYSICAL_BIRTH(bp2) && \
296 DVA_EQUAL(&(bp1)->blk_dva[0], &(bp2)->blk_dva[0]) && \
297 DVA_EQUAL(&(bp1)->blk_dva[1], &(bp2)->blk_dva[1]) && \
298 DVA_EQUAL(&(bp1)->blk_dva[2], &(bp2)->blk_dva[2]))
300 #define ZIO_CHECKSUM_EQUAL(zc1, zc2) \
301 (0 == (((zc1).zc_word[0] - (zc2).zc_word[0]) | \
302 ((zc1).zc_word[1] - (zc2).zc_word[1]) | \
303 ((zc1).zc_word[2] - (zc2).zc_word[2]) | \
304 ((zc1).zc_word[3] - (zc2).zc_word[3])))
306 #define DVA_IS_VALID(dva) (DVA_GET_ASIZE(dva) != 0)
308 #define ZIO_SET_CHECKSUM(zcp, w0, w1, w2, w3) \
310 (zcp)->zc_word[0] = w0; \
311 (zcp)->zc_word[1] = w1; \
312 (zcp)->zc_word[2] = w2; \
313 (zcp)->zc_word[3] = w3; \
316 #define BP_IDENTITY(bp) (&(bp)->blk_dva[0])
317 #define BP_IS_GANG(bp) DVA_GET_GANG(BP_IDENTITY(bp))
318 #define BP_IS_HOLE(bp) ((bp)->blk_birth == 0)
320 /* BP_IS_RAIDZ(bp) assumes no block compression */
321 #define BP_IS_RAIDZ(bp) (DVA_GET_ASIZE(&(bp)->blk_dva[0]) > \
324 #define BP_ZERO(bp) \
326 (bp)->blk_dva[0].dva_word[0] = 0; \
327 (bp)->blk_dva[0].dva_word[1] = 0; \
328 (bp)->blk_dva[1].dva_word[0] = 0; \
329 (bp)->blk_dva[1].dva_word[1] = 0; \
330 (bp)->blk_dva[2].dva_word[0] = 0; \
331 (bp)->blk_dva[2].dva_word[1] = 0; \
332 (bp)->blk_prop = 0; \
333 (bp)->blk_pad[0] = 0; \
334 (bp)->blk_pad[1] = 0; \
335 (bp)->blk_phys_birth = 0; \
336 (bp)->blk_birth = 0; \
337 (bp)->blk_fill = 0; \
338 ZIO_SET_CHECKSUM(&(bp)->blk_cksum, 0, 0, 0, 0); \
342 * Note: the byteorder is either 0 or -1, both of which are palindromes.
343 * This simplifies the endianness handling a bit.
345 #if BYTE_ORDER == _BIG_ENDIAN
346 #define ZFS_HOST_BYTEORDER (0ULL)
348 #define ZFS_HOST_BYTEORDER (-1ULL)
351 #define BP_SHOULD_BYTESWAP(bp) (BP_GET_BYTEORDER(bp) != ZFS_HOST_BYTEORDER)
353 #define BP_SPRINTF_LEN 320
356 * This macro allows code sharing between zfs, libzpool, and mdb.
357 * 'func' is either snprintf() or mdb_snprintf().
358 * 'ws' (whitespace) can be ' ' for single-line format, '\n' for multi-line.
360 #define SPRINTF_BLKPTR(func, ws, buf, bp, type, checksum, compress) \
362 static const char *copyname[] = \
363 { "zero", "single", "double", "triple" }; \
364 int size = BP_SPRINTF_LEN; \
369 len = func(buf + len, size - len, "<NULL>"); \
370 } else if (BP_IS_HOLE(bp)) { \
371 len = func(buf + len, size - len, "<hole>"); \
373 for (int d = 0; d < BP_GET_NDVAS(bp); d++) { \
374 const dva_t *dva = &bp->blk_dva[d]; \
375 if (DVA_IS_VALID(dva)) \
377 len += func(buf + len, size - len, \
378 "DVA[%d]=<%llu:%llx:%llx>%c", d, \
379 (u_longlong_t)DVA_GET_VDEV(dva), \
380 (u_longlong_t)DVA_GET_OFFSET(dva), \
381 (u_longlong_t)DVA_GET_ASIZE(dva), \
384 if (BP_IS_GANG(bp) && \
385 DVA_GET_ASIZE(&bp->blk_dva[2]) <= \
386 DVA_GET_ASIZE(&bp->blk_dva[1]) / 2) \
388 len += func(buf + len, size - len, \
389 "[L%llu %s] %s %s %s %s %s %s%c" \
390 "size=%llxL/%llxP birth=%lluL/%lluP fill=%llu%c" \
391 "cksum=%llx:%llx:%llx:%llx", \
392 (u_longlong_t)BP_GET_LEVEL(bp), \
396 BP_GET_BYTEORDER(bp) == 0 ? "BE" : "LE", \
397 BP_IS_GANG(bp) ? "gang" : "contiguous", \
398 BP_GET_DEDUP(bp) ? "dedup" : "unique", \
401 (u_longlong_t)BP_GET_LSIZE(bp), \
402 (u_longlong_t)BP_GET_PSIZE(bp), \
403 (u_longlong_t)bp->blk_birth, \
404 (u_longlong_t)BP_PHYSICAL_BIRTH(bp), \
405 (u_longlong_t)bp->blk_fill, \
407 (u_longlong_t)bp->blk_cksum.zc_word[0], \
408 (u_longlong_t)bp->blk_cksum.zc_word[1], \
409 (u_longlong_t)bp->blk_cksum.zc_word[2], \
410 (u_longlong_t)bp->blk_cksum.zc_word[3]); \
412 ASSERT(len < size); \
417 #define BP_GET_BUFC_TYPE(bp) \
418 (((BP_GET_LEVEL(bp) > 0) || (DMU_OT_IS_METADATA(BP_GET_TYPE(bp)))) ? \
419 ARC_BUFC_METADATA : ARC_BUFC_DATA)
421 typedef enum spa_import_type {
426 /* state manipulation functions */
427 extern int spa_open(const char *pool, spa_t **, void *tag);
428 extern int spa_open_rewind(const char *pool, spa_t **, void *tag,
429 nvlist_t *policy, nvlist_t **config);
430 extern int spa_get_stats(const char *pool, nvlist_t **config, char *altroot,
432 extern int spa_create(const char *pool, nvlist_t *config, nvlist_t *props,
435 extern int spa_import_rootpool(char *devpath, char *devid);
437 extern int spa_import_rootpool(const char *name);
439 extern int spa_import(const char *pool, nvlist_t *config, nvlist_t *props,
441 extern nvlist_t *spa_tryimport(nvlist_t *tryconfig);
442 extern int spa_destroy(char *pool);
443 extern int spa_export(char *pool, nvlist_t **oldconfig, boolean_t force,
444 boolean_t hardforce);
445 extern int spa_reset(char *pool);
446 extern void spa_async_request(spa_t *spa, int flag);
447 extern void spa_async_unrequest(spa_t *spa, int flag);
448 extern void spa_async_suspend(spa_t *spa);
449 extern void spa_async_resume(spa_t *spa);
450 extern spa_t *spa_inject_addref(char *pool);
451 extern void spa_inject_delref(spa_t *spa);
452 extern void spa_scan_stat_init(spa_t *spa);
453 extern int spa_scan_get_stats(spa_t *spa, pool_scan_stat_t *ps);
455 #define SPA_ASYNC_CONFIG_UPDATE 0x01
456 #define SPA_ASYNC_REMOVE 0x02
457 #define SPA_ASYNC_PROBE 0x04
458 #define SPA_ASYNC_RESILVER_DONE 0x08
459 #define SPA_ASYNC_RESILVER 0x10
460 #define SPA_ASYNC_AUTOEXPAND 0x20
461 #define SPA_ASYNC_REMOVE_DONE 0x40
462 #define SPA_ASYNC_REMOVE_STOP 0x80
465 * Controls the behavior of spa_vdev_remove().
467 #define SPA_REMOVE_UNSPARE 0x01
468 #define SPA_REMOVE_DONE 0x02
470 /* device manipulation */
471 extern int spa_vdev_add(spa_t *spa, nvlist_t *nvroot);
472 extern int spa_vdev_attach(spa_t *spa, uint64_t guid, nvlist_t *nvroot,
474 extern int spa_vdev_detach(spa_t *spa, uint64_t guid, uint64_t pguid,
476 extern int spa_vdev_remove(spa_t *spa, uint64_t guid, boolean_t unspare);
477 extern boolean_t spa_vdev_remove_active(spa_t *spa);
478 extern int spa_vdev_setpath(spa_t *spa, uint64_t guid, const char *newpath);
479 extern int spa_vdev_setfru(spa_t *spa, uint64_t guid, const char *newfru);
480 extern int spa_vdev_split_mirror(spa_t *spa, char *newname, nvlist_t *config,
481 nvlist_t *props, boolean_t exp);
483 /* spare state (which is global across all pools) */
484 extern void spa_spare_add(vdev_t *vd);
485 extern void spa_spare_remove(vdev_t *vd);
486 extern boolean_t spa_spare_exists(uint64_t guid, uint64_t *pool, int *refcnt);
487 extern void spa_spare_activate(vdev_t *vd);
489 /* L2ARC state (which is global across all pools) */
490 extern void spa_l2cache_add(vdev_t *vd);
491 extern void spa_l2cache_remove(vdev_t *vd);
492 extern boolean_t spa_l2cache_exists(uint64_t guid, uint64_t *pool);
493 extern void spa_l2cache_activate(vdev_t *vd);
494 extern void spa_l2cache_drop(spa_t *spa);
497 extern int spa_scan(spa_t *spa, pool_scan_func_t func);
498 extern int spa_scan_stop(spa_t *spa);
501 extern void spa_sync(spa_t *spa, uint64_t txg); /* only for DMU use */
502 extern void spa_sync_allpools(void);
504 /* spa namespace global mutex */
505 extern kmutex_t spa_namespace_lock;
508 * SPA configuration functions in spa_config.c
511 #define SPA_CONFIG_UPDATE_POOL 0
512 #define SPA_CONFIG_UPDATE_VDEVS 1
514 extern void spa_config_sync(spa_t *, boolean_t, boolean_t);
515 extern void spa_config_load(void);
516 extern nvlist_t *spa_all_configs(uint64_t *);
517 extern void spa_config_set(spa_t *spa, nvlist_t *config);
518 extern nvlist_t *spa_config_generate(spa_t *spa, vdev_t *vd, uint64_t txg,
520 extern void spa_config_update(spa_t *spa, int what);
523 * Miscellaneous SPA routines in spa_misc.c
526 /* Namespace manipulation */
527 extern spa_t *spa_lookup(const char *name);
528 extern spa_t *spa_add(const char *name, nvlist_t *config, const char *altroot);
529 extern void spa_remove(spa_t *spa);
530 extern spa_t *spa_next(spa_t *prev);
532 /* Refcount functions */
533 extern void spa_open_ref(spa_t *spa, void *tag);
534 extern void spa_close(spa_t *spa, void *tag);
535 extern boolean_t spa_refcount_zero(spa_t *spa);
537 #define SCL_NONE 0x00
538 #define SCL_CONFIG 0x01
539 #define SCL_STATE 0x02
540 #define SCL_L2ARC 0x04 /* hack until L2ARC 2.0 */
541 #define SCL_ALLOC 0x08
543 #define SCL_FREE 0x20
544 #define SCL_VDEV 0x40
546 #define SCL_ALL ((1 << SCL_LOCKS) - 1)
547 #define SCL_STATE_ALL (SCL_STATE | SCL_L2ARC | SCL_ZIO)
549 /* Pool configuration locks */
550 extern int spa_config_tryenter(spa_t *spa, int locks, void *tag, krw_t rw);
551 extern void spa_config_enter(spa_t *spa, int locks, void *tag, krw_t rw);
552 extern void spa_config_exit(spa_t *spa, int locks, void *tag);
553 extern int spa_config_held(spa_t *spa, int locks, krw_t rw);
555 /* Pool vdev add/remove lock */
556 extern uint64_t spa_vdev_enter(spa_t *spa);
557 extern uint64_t spa_vdev_config_enter(spa_t *spa);
558 extern void spa_vdev_config_exit(spa_t *spa, vdev_t *vd, uint64_t txg,
559 int error, char *tag);
560 extern int spa_vdev_exit(spa_t *spa, vdev_t *vd, uint64_t txg, int error);
562 /* Pool vdev state change lock */
563 extern void spa_vdev_state_enter(spa_t *spa, int oplock);
564 extern int spa_vdev_state_exit(spa_t *spa, vdev_t *vd, int error);
567 typedef enum spa_log_state {
568 SPA_LOG_UNKNOWN = 0, /* unknown log state */
569 SPA_LOG_MISSING, /* missing log(s) */
570 SPA_LOG_CLEAR, /* clear the log(s) */
571 SPA_LOG_GOOD, /* log(s) are good */
574 extern spa_log_state_t spa_get_log_state(spa_t *spa);
575 extern void spa_set_log_state(spa_t *spa, spa_log_state_t state);
576 extern int spa_offline_log(spa_t *spa);
578 /* Log claim callback */
579 extern void spa_claim_notify(zio_t *zio);
581 /* Accessor functions */
582 extern boolean_t spa_shutting_down(spa_t *spa);
583 extern struct dsl_pool *spa_get_dsl(spa_t *spa);
584 extern boolean_t spa_is_initializing(spa_t *spa);
585 extern blkptr_t *spa_get_rootblkptr(spa_t *spa);
586 extern void spa_set_rootblkptr(spa_t *spa, const blkptr_t *bp);
587 extern void spa_altroot(spa_t *, char *, size_t);
588 extern int spa_sync_pass(spa_t *spa);
589 extern char *spa_name(spa_t *spa);
590 extern uint64_t spa_guid(spa_t *spa);
591 extern uint64_t spa_load_guid(spa_t *spa);
592 extern uint64_t spa_last_synced_txg(spa_t *spa);
593 extern uint64_t spa_first_txg(spa_t *spa);
594 extern uint64_t spa_syncing_txg(spa_t *spa);
595 extern uint64_t spa_version(spa_t *spa);
596 extern pool_state_t spa_state(spa_t *spa);
597 extern spa_load_state_t spa_load_state(spa_t *spa);
598 extern uint64_t spa_freeze_txg(spa_t *spa);
599 extern uint64_t spa_get_asize(spa_t *spa, uint64_t lsize);
600 extern uint64_t spa_get_dspace(spa_t *spa);
601 extern void spa_update_dspace(spa_t *spa);
602 extern uint64_t spa_version(spa_t *spa);
603 extern boolean_t spa_deflate(spa_t *spa);
604 extern metaslab_class_t *spa_normal_class(spa_t *spa);
605 extern metaslab_class_t *spa_log_class(spa_t *spa);
606 extern int spa_max_replication(spa_t *spa);
607 extern int spa_prev_software_version(spa_t *spa);
608 extern int spa_busy(void);
609 extern uint8_t spa_get_failmode(spa_t *spa);
610 extern boolean_t spa_suspended(spa_t *spa);
611 extern uint64_t spa_bootfs(spa_t *spa);
612 extern uint64_t spa_delegation(spa_t *spa);
613 extern objset_t *spa_meta_objset(spa_t *spa);
614 extern uint64_t spa_deadman_synctime(spa_t *spa);
616 /* Miscellaneous support routines */
617 extern void spa_activate_mos_feature(spa_t *spa, const char *feature);
618 extern void spa_deactivate_mos_feature(spa_t *spa, const char *feature);
619 extern int spa_rename(const char *oldname, const char *newname);
620 extern spa_t *spa_by_guid(uint64_t pool_guid, uint64_t device_guid);
621 extern boolean_t spa_guid_exists(uint64_t pool_guid, uint64_t device_guid);
622 extern char *spa_strdup(const char *);
623 extern void spa_strfree(char *);
624 extern uint64_t spa_get_random(uint64_t range);
625 extern uint64_t spa_generate_guid(spa_t *spa);
626 extern void sprintf_blkptr(char *buf, const blkptr_t *bp);
627 extern void spa_freeze(spa_t *spa);
628 extern int spa_change_guid(spa_t *spa);
629 extern void spa_upgrade(spa_t *spa, uint64_t version);
630 extern void spa_evict_all(void);
631 extern vdev_t *spa_lookup_by_guid(spa_t *spa, uint64_t guid,
633 extern boolean_t spa_has_spare(spa_t *, uint64_t guid);
634 extern uint64_t dva_get_dsize_sync(spa_t *spa, const dva_t *dva);
635 extern uint64_t bp_get_dsize_sync(spa_t *spa, const blkptr_t *bp);
636 extern uint64_t bp_get_dsize(spa_t *spa, const blkptr_t *bp);
637 extern boolean_t spa_has_slogs(spa_t *spa);
638 extern boolean_t spa_is_root(spa_t *spa);
639 extern boolean_t spa_writeable(spa_t *spa);
641 extern int spa_mode(spa_t *spa);
642 extern uint64_t zfs_strtonum(const char *str, char **nptr);
643 #define strtonum(str, nptr) zfs_strtonum((str), (nptr))
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 extern int spa_history_log_nvl(spa_t *spa, nvlist_t *nvl);
652 extern void spa_history_log_version(spa_t *spa, const char *operation);
653 extern void spa_history_log_internal(spa_t *spa, const char *operation,
654 dmu_tx_t *tx, const char *fmt, ...);
655 extern void spa_history_log_internal_ds(struct dsl_dataset *ds, const char *op,
656 dmu_tx_t *tx, const char *fmt, ...);
657 extern void spa_history_log_internal_dd(dsl_dir_t *dd, const char *operation,
658 dmu_tx_t *tx, const char *fmt, ...);
662 extern void spa_log_error(spa_t *spa, zio_t *zio);
663 extern void zfs_ereport_post(const char *cls, spa_t *spa, vdev_t *vd,
664 zio_t *zio, uint64_t stateoroffset, uint64_t length);
665 extern void zfs_post_remove(spa_t *spa, vdev_t *vd);
666 extern void zfs_post_state_change(spa_t *spa, vdev_t *vd);
667 extern void zfs_post_autoreplace(spa_t *spa, vdev_t *vd);
668 extern uint64_t spa_get_errlog_size(spa_t *spa);
669 extern int spa_get_errlog(spa_t *spa, void *uaddr, size_t *count);
670 extern void spa_errlog_rotate(spa_t *spa);
671 extern void spa_errlog_drain(spa_t *spa);
672 extern void spa_errlog_sync(spa_t *spa, uint64_t txg);
673 extern void spa_get_errlists(spa_t *spa, avl_tree_t *last, avl_tree_t *scrub);
676 extern void vdev_cache_stat_init(void);
677 extern void vdev_cache_stat_fini(void);
679 /* Initialization and termination */
680 extern void spa_init(int flags);
681 extern void spa_fini(void);
682 extern void spa_boot_init();
685 extern int spa_prop_set(spa_t *spa, nvlist_t *nvp);
686 extern int spa_prop_get(spa_t *spa, nvlist_t **nvp);
687 extern void spa_prop_clear_bootfs(spa_t *spa, uint64_t obj, dmu_tx_t *tx);
688 extern void spa_configfile_set(spa_t *, nvlist_t *, boolean_t);
690 /* asynchronous event notification */
691 extern void spa_event_notify(spa_t *spa, vdev_t *vdev, const char *name);
694 #define dprintf_bp(bp, fmt, ...) do { \
695 if (zfs_flags & ZFS_DEBUG_DPRINTF) { \
696 char *__blkbuf = kmem_alloc(BP_SPRINTF_LEN, KM_SLEEP); \
697 sprintf_blkptr(__blkbuf, (bp)); \
698 dprintf(fmt " %s\n", __VA_ARGS__, __blkbuf); \
699 kmem_free(__blkbuf, BP_SPRINTF_LEN); \
701 _NOTE(CONSTCOND) } while (0)
703 #define dprintf_bp(bp, fmt, ...)
706 extern boolean_t spa_debug_enabled(spa_t *spa);
707 #define spa_dbgmsg(spa, ...) \
709 if (spa_debug_enabled(spa)) \
710 zfs_dbgmsg(__VA_ARGS__); \
713 extern int spa_mode_global; /* mode, e.g. FREAD | FWRITE */
719 #endif /* _SYS_SPA_H */