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) 2011, 2018 by Delphix. All rights reserved.
24 * Copyright 2011 Nexenta Systems, Inc. All rights reserved.
25 * Copyright (c) 2014 Spectra Logic Corporation, All rights reserved.
26 * Copyright 2013 Saso Kiselkov. All rights reserved.
27 * Copyright (c) 2014 Integros [integros.com]
28 * Copyright 2017 Joyent, Inc.
29 * Copyright (c) 2017 Datto Inc.
30 * Copyright (c) 2017, Intel Corporation.
37 #include <sys/zfs_context.h>
38 #include <sys/nvpair.h>
39 #include <sys/sysevent.h>
40 #include <sys/sysmacros.h>
41 #include <sys/types.h>
42 #include <sys/fs/zfs.h>
50 * Forward references that lots of things need.
52 typedef struct spa spa_t;
53 typedef struct vdev vdev_t;
54 typedef struct metaslab metaslab_t;
55 typedef struct metaslab_group metaslab_group_t;
56 typedef struct metaslab_class metaslab_class_t;
57 typedef struct zio zio_t;
58 typedef struct zilog zilog_t;
59 typedef struct spa_aux_vdev spa_aux_vdev_t;
60 typedef struct ddt ddt_t;
61 typedef struct ddt_entry ddt_entry_t;
66 * General-purpose 32-bit and 64-bit bitfield encodings.
68 #define BF32_DECODE(x, low, len) P2PHASE((x) >> (low), 1U << (len))
69 #define BF64_DECODE(x, low, len) P2PHASE((x) >> (low), 1ULL << (len))
70 #define BF32_ENCODE(x, low, len) (P2PHASE((x), 1U << (len)) << (low))
71 #define BF64_ENCODE(x, low, len) (P2PHASE((x), 1ULL << (len)) << (low))
73 #define BF32_GET(x, low, len) BF32_DECODE(x, low, len)
74 #define BF64_GET(x, low, len) BF64_DECODE(x, low, len)
76 #define BF32_SET(x, low, len, val) do { \
77 ASSERT3U(val, <, 1U << (len)); \
78 ASSERT3U(low + len, <=, 32); \
79 (x) ^= BF32_ENCODE((x >> low) ^ (val), low, len); \
80 _NOTE(CONSTCOND) } while (0)
82 #define BF64_SET(x, low, len, val) do { \
83 ASSERT3U(val, <, 1ULL << (len)); \
84 ASSERT3U(low + len, <=, 64); \
85 ((x) ^= BF64_ENCODE((x >> low) ^ (val), low, len)); \
86 _NOTE(CONSTCOND) } while (0)
88 #define BF32_GET_SB(x, low, len, shift, bias) \
89 ((BF32_GET(x, low, len) + (bias)) << (shift))
90 #define BF64_GET_SB(x, low, len, shift, bias) \
91 ((BF64_GET(x, low, len) + (bias)) << (shift))
93 #define BF32_SET_SB(x, low, len, shift, bias, val) do { \
94 ASSERT(IS_P2ALIGNED(val, 1U << shift)); \
95 ASSERT3S((val) >> (shift), >=, bias); \
96 BF32_SET(x, low, len, ((val) >> (shift)) - (bias)); \
97 _NOTE(CONSTCOND) } while (0)
98 #define BF64_SET_SB(x, low, len, shift, bias, val) do { \
99 ASSERT(IS_P2ALIGNED(val, 1ULL << shift)); \
100 ASSERT3S((val) >> (shift), >=, bias); \
101 BF64_SET(x, low, len, ((val) >> (shift)) - (bias)); \
102 _NOTE(CONSTCOND) } while (0)
105 * We currently support block sizes from 512 bytes to 16MB.
106 * The benefits of larger blocks, and thus larger IO, need to be weighed
107 * against the cost of COWing a giant block to modify one byte, and the
108 * large latency of reading or writing a large block.
110 * Note that although blocks up to 16MB are supported, the recordsize
111 * property can not be set larger than zfs_max_recordsize (default 1MB).
112 * See the comment near zfs_max_recordsize in dsl_dataset.c for details.
114 * Note that although the LSIZE field of the blkptr_t can store sizes up
115 * to 32MB, the dnode's dn_datablkszsec can only store sizes up to
116 * 32MB - 512 bytes. Therefore, we limit SPA_MAXBLOCKSIZE to 16MB.
118 #define SPA_MINBLOCKSHIFT 9
119 #define SPA_OLD_MAXBLOCKSHIFT 17
120 #define SPA_MAXBLOCKSHIFT 24
121 #define SPA_MINBLOCKSIZE (1ULL << SPA_MINBLOCKSHIFT)
122 #define SPA_OLD_MAXBLOCKSIZE (1ULL << SPA_OLD_MAXBLOCKSHIFT)
123 #define SPA_MAXBLOCKSIZE (1ULL << SPA_MAXBLOCKSHIFT)
126 * Default maximum supported logical ashift.
128 * The current 8k allocation block size limit is due to the 8k
129 * aligned/sized operations performed by vdev_probe() on
130 * vdev_label->vl_pad2. Using another "safe region" for these tests
131 * would allow the limit to be raised to 16k, at the expense of
132 * only having 8 available uberblocks in the label area.
134 #define SPA_MAXASHIFT 13
137 * Default minimum supported logical ashift.
139 #define SPA_MINASHIFT SPA_MINBLOCKSHIFT
142 * Size of block to hold the configuration data (a packed nvlist)
144 #define SPA_CONFIG_BLOCKSIZE (1ULL << 14)
147 * The DVA size encodings for LSIZE and PSIZE support blocks up to 32MB.
148 * The ASIZE encoding should be at least 64 times larger (6 more bits)
149 * to support up to 4-way RAID-Z mirror mode with worst-case gang block
150 * overhead, three DVAs per bp, plus one more bit in case we do anything
151 * else that expands the ASIZE.
153 #define SPA_LSIZEBITS 16 /* LSIZE up to 32M (2^16 * 512) */
154 #define SPA_PSIZEBITS 16 /* PSIZE up to 32M (2^16 * 512) */
155 #define SPA_ASIZEBITS 24 /* ASIZE up to 64 times larger */
157 #define SPA_COMPRESSBITS 7
158 #define SPA_VDEVBITS 24
161 * All SPA data is represented by 128-bit data virtual addresses (DVAs).
162 * The members of the dva_t should be considered opaque outside the SPA.
165 uint64_t dva_word[2];
169 * Each block has a 256-bit checksum -- strong enough for cryptographic hashes.
171 typedef struct zio_cksum {
176 * Some checksums/hashes need a 256-bit initialization salt. This salt is kept
177 * secret and is suitable for use in MAC algorithms as the key.
179 typedef struct zio_cksum_salt {
180 uint8_t zcs_bytes[32];
184 * Each block is described by its DVAs, time of birth, checksum, etc.
185 * The word-by-word, bit-by-bit layout of the blkptr is as follows:
187 * 64 56 48 40 32 24 16 8 0
188 * +-------+-------+-------+-------+-------+-------+-------+-------+
189 * 0 | pad | vdev1 | GRID | ASIZE |
190 * +-------+-------+-------+-------+-------+-------+-------+-------+
192 * +-------+-------+-------+-------+-------+-------+-------+-------+
193 * 2 | pad | vdev2 | GRID | ASIZE |
194 * +-------+-------+-------+-------+-------+-------+-------+-------+
196 * +-------+-------+-------+-------+-------+-------+-------+-------+
197 * 4 | pad | vdev3 | GRID | ASIZE |
198 * +-------+-------+-------+-------+-------+-------+-------+-------+
200 * +-------+-------+-------+-------+-------+-------+-------+-------+
201 * 6 |BDX|lvl| type | cksum |E| comp| PSIZE | LSIZE |
202 * +-------+-------+-------+-------+-------+-------+-------+-------+
204 * +-------+-------+-------+-------+-------+-------+-------+-------+
206 * +-------+-------+-------+-------+-------+-------+-------+-------+
207 * 9 | physical birth txg |
208 * +-------+-------+-------+-------+-------+-------+-------+-------+
209 * a | logical birth txg |
210 * +-------+-------+-------+-------+-------+-------+-------+-------+
212 * +-------+-------+-------+-------+-------+-------+-------+-------+
214 * +-------+-------+-------+-------+-------+-------+-------+-------+
216 * +-------+-------+-------+-------+-------+-------+-------+-------+
218 * +-------+-------+-------+-------+-------+-------+-------+-------+
220 * +-------+-------+-------+-------+-------+-------+-------+-------+
224 * vdev virtual device ID
225 * offset offset into virtual device
227 * PSIZE physical size (after compression)
228 * ASIZE allocated size (including RAID-Z parity and gang block headers)
229 * GRID RAID-Z layout information (reserved for future use)
230 * cksum checksum function
231 * comp compression function
232 * G gang block indicator
233 * B byteorder (endianness)
235 * X encryption (on version 30, which is not supported)
236 * E blkptr_t contains embedded data (see below)
237 * lvl level of indirection
238 * type DMU object type
239 * phys birth txg when dva[0] was written; zero if same as logical birth txg
240 * note that typically all the dva's would be written in this
241 * txg, but they could be different if they were moved by
243 * log. birth transaction group in which the block was logically born
244 * fill count number of non-zero blocks under this bp
245 * checksum[4] 256-bit checksum of the data this bp describes
249 * "Embedded" blkptr_t's don't actually point to a block, instead they
250 * have a data payload embedded in the blkptr_t itself. See the comment
251 * in blkptr.c for more details.
253 * The blkptr_t is laid out as follows:
255 * 64 56 48 40 32 24 16 8 0
256 * +-------+-------+-------+-------+-------+-------+-------+-------+
263 * +-------+-------+-------+-------+-------+-------+-------+-------+
264 * 6 |BDX|lvl| type | etype |E| comp| PSIZE| LSIZE |
265 * +-------+-------+-------+-------+-------+-------+-------+-------+
269 * +-------+-------+-------+-------+-------+-------+-------+-------+
270 * a | logical birth txg |
271 * +-------+-------+-------+-------+-------+-------+-------+-------+
277 * +-------+-------+-------+-------+-------+-------+-------+-------+
281 * payload contains the embedded data
282 * B (byteorder) byteorder (endianness)
283 * D (dedup) padding (set to zero)
284 * X encryption (set to zero; see above)
285 * E (embedded) set to one
286 * lvl indirection level
287 * type DMU object type
288 * etype how to interpret embedded data (BP_EMBEDDED_TYPE_*)
289 * comp compression function of payload
290 * PSIZE size of payload after compression, in bytes
291 * LSIZE logical size of payload, in bytes
292 * note that 25 bits is enough to store the largest
293 * "normal" BP's LSIZE (2^16 * 2^9) in bytes
294 * log. birth transaction group in which the block was logically born
296 * Note that LSIZE and PSIZE are stored in bytes, whereas for non-embedded
297 * bp's they are stored in units of SPA_MINBLOCKSHIFT.
298 * Generally, the generic BP_GET_*() macros can be used on embedded BP's.
299 * The B, D, X, lvl, type, and comp fields are stored the same as with normal
300 * BP's so the BP_SET_* macros can be used with them. etype, PSIZE, LSIZE must
301 * be set with the BPE_SET_* macros. BP_SET_EMBEDDED() should be called before
302 * other macros, as they assert that they are only used on BP's of the correct
306 #define BPE_GET_ETYPE(bp) \
307 (ASSERT(BP_IS_EMBEDDED(bp)), \
308 BF64_GET((bp)->blk_prop, 40, 8))
309 #define BPE_SET_ETYPE(bp, t) do { \
310 ASSERT(BP_IS_EMBEDDED(bp)); \
311 BF64_SET((bp)->blk_prop, 40, 8, t); \
312 _NOTE(CONSTCOND) } while (0)
314 #define BPE_GET_LSIZE(bp) \
315 (ASSERT(BP_IS_EMBEDDED(bp)), \
316 BF64_GET_SB((bp)->blk_prop, 0, 25, 0, 1))
317 #define BPE_SET_LSIZE(bp, x) do { \
318 ASSERT(BP_IS_EMBEDDED(bp)); \
319 BF64_SET_SB((bp)->blk_prop, 0, 25, 0, 1, x); \
320 _NOTE(CONSTCOND) } while (0)
322 #define BPE_GET_PSIZE(bp) \
323 (ASSERT(BP_IS_EMBEDDED(bp)), \
324 BF64_GET_SB((bp)->blk_prop, 25, 7, 0, 1))
325 #define BPE_SET_PSIZE(bp, x) do { \
326 ASSERT(BP_IS_EMBEDDED(bp)); \
327 BF64_SET_SB((bp)->blk_prop, 25, 7, 0, 1, x); \
328 _NOTE(CONSTCOND) } while (0)
330 typedef enum bp_embedded_type {
331 BP_EMBEDDED_TYPE_DATA,
332 BP_EMBEDDED_TYPE_RESERVED, /* Reserved for an unintegrated feature. */
333 NUM_BP_EMBEDDED_TYPES = BP_EMBEDDED_TYPE_RESERVED
334 } bp_embedded_type_t;
336 #define BPE_NUM_WORDS 14
337 #define BPE_PAYLOAD_SIZE (BPE_NUM_WORDS * sizeof (uint64_t))
338 #define BPE_IS_PAYLOADWORD(bp, wp) \
339 ((wp) != &(bp)->blk_prop && (wp) != &(bp)->blk_birth)
341 #define SPA_BLKPTRSHIFT 7 /* blkptr_t is 128 bytes */
342 #define SPA_DVAS_PER_BP 3 /* Number of DVAs in a bp */
343 #define SPA_SYNC_MIN_VDEVS 3 /* min vdevs to update during sync */
346 * A block is a hole when it has either 1) never been written to, or
347 * 2) is zero-filled. In both cases, ZFS can return all zeroes for all reads
348 * without physically allocating disk space. Holes are represented in the
349 * blkptr_t structure by zeroed blk_dva. Correct checking for holes is
350 * done through the BP_IS_HOLE macro. For holes, the logical size, level,
351 * DMU object type, and birth times are all also stored for holes that
352 * were written to at some point (i.e. were punched after having been filled).
354 typedef struct blkptr {
355 dva_t blk_dva[SPA_DVAS_PER_BP]; /* Data Virtual Addresses */
356 uint64_t blk_prop; /* size, compression, type, etc */
357 uint64_t blk_pad[2]; /* Extra space for the future */
358 uint64_t blk_phys_birth; /* txg when block was allocated */
359 uint64_t blk_birth; /* transaction group at birth */
360 uint64_t blk_fill; /* fill count */
361 zio_cksum_t blk_cksum; /* 256-bit checksum */
365 * Macros to get and set fields in a bp or DVA.
367 #define DVA_GET_ASIZE(dva) \
368 BF64_GET_SB((dva)->dva_word[0], 0, SPA_ASIZEBITS, SPA_MINBLOCKSHIFT, 0)
369 #define DVA_SET_ASIZE(dva, x) \
370 BF64_SET_SB((dva)->dva_word[0], 0, SPA_ASIZEBITS, \
371 SPA_MINBLOCKSHIFT, 0, x)
373 #define DVA_GET_GRID(dva) BF64_GET((dva)->dva_word[0], 24, 8)
374 #define DVA_SET_GRID(dva, x) BF64_SET((dva)->dva_word[0], 24, 8, x)
376 #define DVA_GET_VDEV(dva) BF64_GET((dva)->dva_word[0], 32, SPA_VDEVBITS)
377 #define DVA_SET_VDEV(dva, x) \
378 BF64_SET((dva)->dva_word[0], 32, SPA_VDEVBITS, x)
380 #define DVA_GET_OFFSET(dva) \
381 BF64_GET_SB((dva)->dva_word[1], 0, 63, SPA_MINBLOCKSHIFT, 0)
382 #define DVA_SET_OFFSET(dva, x) \
383 BF64_SET_SB((dva)->dva_word[1], 0, 63, SPA_MINBLOCKSHIFT, 0, x)
385 #define DVA_GET_GANG(dva) BF64_GET((dva)->dva_word[1], 63, 1)
386 #define DVA_SET_GANG(dva, x) BF64_SET((dva)->dva_word[1], 63, 1, x)
388 #define BP_GET_LSIZE(bp) \
389 (BP_IS_EMBEDDED(bp) ? \
390 (BPE_GET_ETYPE(bp) == BP_EMBEDDED_TYPE_DATA ? BPE_GET_LSIZE(bp) : 0): \
391 BF64_GET_SB((bp)->blk_prop, 0, SPA_LSIZEBITS, SPA_MINBLOCKSHIFT, 1))
392 #define BP_SET_LSIZE(bp, x) do { \
393 ASSERT(!BP_IS_EMBEDDED(bp)); \
394 BF64_SET_SB((bp)->blk_prop, \
395 0, SPA_LSIZEBITS, SPA_MINBLOCKSHIFT, 1, x); \
396 _NOTE(CONSTCOND) } while (0)
398 #define BP_GET_PSIZE(bp) \
399 (BP_IS_EMBEDDED(bp) ? 0 : \
400 BF64_GET_SB((bp)->blk_prop, 16, SPA_PSIZEBITS, SPA_MINBLOCKSHIFT, 1))
401 #define BP_SET_PSIZE(bp, x) do { \
402 ASSERT(!BP_IS_EMBEDDED(bp)); \
403 BF64_SET_SB((bp)->blk_prop, \
404 16, SPA_PSIZEBITS, SPA_MINBLOCKSHIFT, 1, x); \
405 _NOTE(CONSTCOND) } while (0)
407 #define BP_GET_COMPRESS(bp) \
408 BF64_GET((bp)->blk_prop, 32, SPA_COMPRESSBITS)
409 #define BP_SET_COMPRESS(bp, x) \
410 BF64_SET((bp)->blk_prop, 32, SPA_COMPRESSBITS, x)
412 #define BP_IS_EMBEDDED(bp) BF64_GET((bp)->blk_prop, 39, 1)
413 #define BP_SET_EMBEDDED(bp, x) BF64_SET((bp)->blk_prop, 39, 1, x)
415 #define BP_GET_CHECKSUM(bp) \
416 (BP_IS_EMBEDDED(bp) ? ZIO_CHECKSUM_OFF : \
417 BF64_GET((bp)->blk_prop, 40, 8))
418 #define BP_SET_CHECKSUM(bp, x) do { \
419 ASSERT(!BP_IS_EMBEDDED(bp)); \
420 BF64_SET((bp)->blk_prop, 40, 8, x); \
421 _NOTE(CONSTCOND) } while (0)
423 #define BP_GET_TYPE(bp) BF64_GET((bp)->blk_prop, 48, 8)
424 #define BP_SET_TYPE(bp, x) BF64_SET((bp)->blk_prop, 48, 8, x)
426 #define BP_GET_LEVEL(bp) BF64_GET((bp)->blk_prop, 56, 5)
427 #define BP_SET_LEVEL(bp, x) BF64_SET((bp)->blk_prop, 56, 5, x)
429 #define BP_GET_DEDUP(bp) BF64_GET((bp)->blk_prop, 62, 1)
430 #define BP_SET_DEDUP(bp, x) BF64_SET((bp)->blk_prop, 62, 1, x)
432 #define BP_GET_BYTEORDER(bp) BF64_GET((bp)->blk_prop, 63, 1)
433 #define BP_SET_BYTEORDER(bp, x) BF64_SET((bp)->blk_prop, 63, 1, x)
435 #define BP_PHYSICAL_BIRTH(bp) \
436 (BP_IS_EMBEDDED(bp) ? 0 : \
437 (bp)->blk_phys_birth ? (bp)->blk_phys_birth : (bp)->blk_birth)
439 #define BP_SET_BIRTH(bp, logical, physical) \
441 ASSERT(!BP_IS_EMBEDDED(bp)); \
442 (bp)->blk_birth = (logical); \
443 (bp)->blk_phys_birth = ((logical) == (physical) ? 0 : (physical)); \
446 #define BP_GET_FILL(bp) (BP_IS_EMBEDDED(bp) ? 1 : (bp)->blk_fill)
448 #define BP_IS_METADATA(bp) \
449 (BP_GET_LEVEL(bp) > 0 || DMU_OT_IS_METADATA(BP_GET_TYPE(bp)))
451 #define BP_GET_ASIZE(bp) \
452 (BP_IS_EMBEDDED(bp) ? 0 : \
453 DVA_GET_ASIZE(&(bp)->blk_dva[0]) + \
454 DVA_GET_ASIZE(&(bp)->blk_dva[1]) + \
455 DVA_GET_ASIZE(&(bp)->blk_dva[2]))
457 #define BP_GET_UCSIZE(bp) \
458 (BP_IS_METADATA(bp) ? BP_GET_PSIZE(bp) : BP_GET_LSIZE(bp))
460 #define BP_GET_NDVAS(bp) \
461 (BP_IS_EMBEDDED(bp) ? 0 : \
462 !!DVA_GET_ASIZE(&(bp)->blk_dva[0]) + \
463 !!DVA_GET_ASIZE(&(bp)->blk_dva[1]) + \
464 !!DVA_GET_ASIZE(&(bp)->blk_dva[2]))
466 #define BP_COUNT_GANG(bp) \
467 (BP_IS_EMBEDDED(bp) ? 0 : \
468 (DVA_GET_GANG(&(bp)->blk_dva[0]) + \
469 DVA_GET_GANG(&(bp)->blk_dva[1]) + \
470 DVA_GET_GANG(&(bp)->blk_dva[2])))
472 #define DVA_EQUAL(dva1, dva2) \
473 ((dva1)->dva_word[1] == (dva2)->dva_word[1] && \
474 (dva1)->dva_word[0] == (dva2)->dva_word[0])
476 #define BP_EQUAL(bp1, bp2) \
477 (BP_PHYSICAL_BIRTH(bp1) == BP_PHYSICAL_BIRTH(bp2) && \
478 (bp1)->blk_birth == (bp2)->blk_birth && \
479 DVA_EQUAL(&(bp1)->blk_dva[0], &(bp2)->blk_dva[0]) && \
480 DVA_EQUAL(&(bp1)->blk_dva[1], &(bp2)->blk_dva[1]) && \
481 DVA_EQUAL(&(bp1)->blk_dva[2], &(bp2)->blk_dva[2]))
483 #define ZIO_CHECKSUM_EQUAL(zc1, zc2) \
484 (0 == (((zc1).zc_word[0] - (zc2).zc_word[0]) | \
485 ((zc1).zc_word[1] - (zc2).zc_word[1]) | \
486 ((zc1).zc_word[2] - (zc2).zc_word[2]) | \
487 ((zc1).zc_word[3] - (zc2).zc_word[3])))
489 #define ZIO_CHECKSUM_IS_ZERO(zc) \
490 (0 == ((zc)->zc_word[0] | (zc)->zc_word[1] | \
491 (zc)->zc_word[2] | (zc)->zc_word[3]))
493 #define ZIO_CHECKSUM_BSWAP(zcp) \
495 (zcp)->zc_word[0] = BSWAP_64((zcp)->zc_word[0]); \
496 (zcp)->zc_word[1] = BSWAP_64((zcp)->zc_word[1]); \
497 (zcp)->zc_word[2] = BSWAP_64((zcp)->zc_word[2]); \
498 (zcp)->zc_word[3] = BSWAP_64((zcp)->zc_word[3]); \
502 #define DVA_IS_VALID(dva) (DVA_GET_ASIZE(dva) != 0)
504 #define ZIO_SET_CHECKSUM(zcp, w0, w1, w2, w3) \
506 (zcp)->zc_word[0] = w0; \
507 (zcp)->zc_word[1] = w1; \
508 (zcp)->zc_word[2] = w2; \
509 (zcp)->zc_word[3] = w3; \
512 #define BP_IDENTITY(bp) (ASSERT(!BP_IS_EMBEDDED(bp)), &(bp)->blk_dva[0])
513 #define BP_IS_GANG(bp) \
514 (BP_IS_EMBEDDED(bp) ? B_FALSE : DVA_GET_GANG(BP_IDENTITY(bp)))
515 #define DVA_IS_EMPTY(dva) ((dva)->dva_word[0] == 0ULL && \
516 (dva)->dva_word[1] == 0ULL)
517 #define BP_IS_HOLE(bp) \
518 (!BP_IS_EMBEDDED(bp) && DVA_IS_EMPTY(BP_IDENTITY(bp)))
520 /* BP_IS_RAIDZ(bp) assumes no block compression */
521 #define BP_IS_RAIDZ(bp) (DVA_GET_ASIZE(&(bp)->blk_dva[0]) > \
524 #define BP_ZERO(bp) \
526 (bp)->blk_dva[0].dva_word[0] = 0; \
527 (bp)->blk_dva[0].dva_word[1] = 0; \
528 (bp)->blk_dva[1].dva_word[0] = 0; \
529 (bp)->blk_dva[1].dva_word[1] = 0; \
530 (bp)->blk_dva[2].dva_word[0] = 0; \
531 (bp)->blk_dva[2].dva_word[1] = 0; \
532 (bp)->blk_prop = 0; \
533 (bp)->blk_pad[0] = 0; \
534 (bp)->blk_pad[1] = 0; \
535 (bp)->blk_phys_birth = 0; \
536 (bp)->blk_birth = 0; \
537 (bp)->blk_fill = 0; \
538 ZIO_SET_CHECKSUM(&(bp)->blk_cksum, 0, 0, 0, 0); \
541 #if BYTE_ORDER == _BIG_ENDIAN
542 #define ZFS_HOST_BYTEORDER (0ULL)
544 #define ZFS_HOST_BYTEORDER (1ULL)
547 #define BP_SHOULD_BYTESWAP(bp) (BP_GET_BYTEORDER(bp) != ZFS_HOST_BYTEORDER)
549 #define BP_SPRINTF_LEN 320
552 * This macro allows code sharing between zfs, libzpool, and mdb.
553 * 'func' is either snprintf() or mdb_snprintf().
554 * 'ws' (whitespace) can be ' ' for single-line format, '\n' for multi-line.
556 #define SNPRINTF_BLKPTR(func, ws, buf, size, bp, type, checksum, compress) \
558 static const char *copyname[] = \
559 { "zero", "single", "double", "triple" }; \
564 len += func(buf + len, size - len, "<NULL>"); \
565 } else if (BP_IS_HOLE(bp)) { \
566 len += func(buf + len, size - len, \
568 "size=%llxL birth=%lluL", \
569 (u_longlong_t)BP_GET_LEVEL(bp), \
571 (u_longlong_t)BP_GET_LSIZE(bp), \
572 (u_longlong_t)bp->blk_birth); \
573 } else if (BP_IS_EMBEDDED(bp)) { \
574 len = func(buf + len, size - len, \
575 "EMBEDDED [L%llu %s] et=%u %s " \
576 "size=%llxL/%llxP birth=%lluL", \
577 (u_longlong_t)BP_GET_LEVEL(bp), \
579 (int)BPE_GET_ETYPE(bp), \
581 (u_longlong_t)BPE_GET_LSIZE(bp), \
582 (u_longlong_t)BPE_GET_PSIZE(bp), \
583 (u_longlong_t)bp->blk_birth); \
585 for (int d = 0; d < BP_GET_NDVAS(bp); d++) { \
586 const dva_t *dva = &bp->blk_dva[d]; \
587 if (DVA_IS_VALID(dva)) \
589 len += func(buf + len, size - len, \
590 "DVA[%d]=<%llu:%llx:%llx>%c", d, \
591 (u_longlong_t)DVA_GET_VDEV(dva), \
592 (u_longlong_t)DVA_GET_OFFSET(dva), \
593 (u_longlong_t)DVA_GET_ASIZE(dva), \
596 if (BP_IS_GANG(bp) && \
597 DVA_GET_ASIZE(&bp->blk_dva[2]) <= \
598 DVA_GET_ASIZE(&bp->blk_dva[1]) / 2) \
600 len += func(buf + len, size - len, \
601 "[L%llu %s] %s %s %s %s %s %s%c" \
602 "size=%llxL/%llxP birth=%lluL/%lluP fill=%llu%c" \
603 "cksum=%llx:%llx:%llx:%llx", \
604 (u_longlong_t)BP_GET_LEVEL(bp), \
608 BP_GET_BYTEORDER(bp) == 0 ? "BE" : "LE", \
609 BP_IS_GANG(bp) ? "gang" : "contiguous", \
610 BP_GET_DEDUP(bp) ? "dedup" : "unique", \
613 (u_longlong_t)BP_GET_LSIZE(bp), \
614 (u_longlong_t)BP_GET_PSIZE(bp), \
615 (u_longlong_t)bp->blk_birth, \
616 (u_longlong_t)BP_PHYSICAL_BIRTH(bp), \
617 (u_longlong_t)BP_GET_FILL(bp), \
619 (u_longlong_t)bp->blk_cksum.zc_word[0], \
620 (u_longlong_t)bp->blk_cksum.zc_word[1], \
621 (u_longlong_t)bp->blk_cksum.zc_word[2], \
622 (u_longlong_t)bp->blk_cksum.zc_word[3]); \
624 ASSERT(len < size); \
627 #define BP_GET_BUFC_TYPE(bp) \
628 (BP_IS_METADATA(bp) ? ARC_BUFC_METADATA : ARC_BUFC_DATA)
630 typedef enum spa_import_type {
635 /* state manipulation functions */
636 extern int spa_open(const char *pool, spa_t **, void *tag);
637 extern int spa_open_rewind(const char *pool, spa_t **, void *tag,
638 nvlist_t *policy, nvlist_t **config);
639 extern int spa_get_stats(const char *pool, nvlist_t **config, char *altroot,
641 extern int spa_create(const char *pool, nvlist_t *config, nvlist_t *props,
644 extern int spa_import_rootpool(char *devpath, char *devid);
646 extern int spa_import_rootpool(const char *name, bool checkpointrewind);
648 extern int spa_import(const char *pool, nvlist_t *config, nvlist_t *props,
650 extern nvlist_t *spa_tryimport(nvlist_t *tryconfig);
651 extern int spa_destroy(char *pool);
652 extern int spa_checkpoint(const char *pool);
653 extern int spa_checkpoint_discard(const char *pool);
654 extern int spa_export(char *pool, nvlist_t **oldconfig, boolean_t force,
655 boolean_t hardforce);
656 extern int spa_reset(char *pool);
657 extern void spa_async_request(spa_t *spa, int flag);
658 extern void spa_async_unrequest(spa_t *spa, int flag);
659 extern void spa_async_suspend(spa_t *spa);
660 extern void spa_async_resume(spa_t *spa);
661 extern spa_t *spa_inject_addref(char *pool);
662 extern void spa_inject_delref(spa_t *spa);
663 extern void spa_scan_stat_init(spa_t *spa);
664 extern int spa_scan_get_stats(spa_t *spa, pool_scan_stat_t *ps);
666 #define SPA_ASYNC_CONFIG_UPDATE 0x01
667 #define SPA_ASYNC_REMOVE 0x02
668 #define SPA_ASYNC_PROBE 0x04
669 #define SPA_ASYNC_RESILVER_DONE 0x08
670 #define SPA_ASYNC_RESILVER 0x10
671 #define SPA_ASYNC_AUTOEXPAND 0x20
672 #define SPA_ASYNC_REMOVE_DONE 0x40
673 #define SPA_ASYNC_REMOVE_STOP 0x80
674 #define SPA_ASYNC_INITIALIZE_RESTART 0x100
677 * Controls the behavior of spa_vdev_remove().
679 #define SPA_REMOVE_UNSPARE 0x01
680 #define SPA_REMOVE_DONE 0x02
682 /* device manipulation */
683 extern int spa_vdev_add(spa_t *spa, nvlist_t *nvroot);
684 extern int spa_vdev_attach(spa_t *spa, uint64_t guid, nvlist_t *nvroot,
686 extern int spa_vdev_detach(spa_t *spa, uint64_t guid, uint64_t pguid,
688 extern int spa_vdev_remove(spa_t *spa, uint64_t guid, boolean_t unspare);
689 extern boolean_t spa_vdev_remove_active(spa_t *spa);
690 extern int spa_vdev_initialize(spa_t *spa, uint64_t guid, uint64_t cmd_type);
691 extern int spa_vdev_setpath(spa_t *spa, uint64_t guid, const char *newpath);
692 extern int spa_vdev_setfru(spa_t *spa, uint64_t guid, const char *newfru);
693 extern int spa_vdev_split_mirror(spa_t *spa, char *newname, nvlist_t *config,
694 nvlist_t *props, boolean_t exp);
696 /* spare state (which is global across all pools) */
697 extern void spa_spare_add(vdev_t *vd);
698 extern void spa_spare_remove(vdev_t *vd);
699 extern boolean_t spa_spare_exists(uint64_t guid, uint64_t *pool, int *refcnt);
700 extern void spa_spare_activate(vdev_t *vd);
702 /* L2ARC state (which is global across all pools) */
703 extern void spa_l2cache_add(vdev_t *vd);
704 extern void spa_l2cache_remove(vdev_t *vd);
705 extern boolean_t spa_l2cache_exists(uint64_t guid, uint64_t *pool);
706 extern void spa_l2cache_activate(vdev_t *vd);
707 extern void spa_l2cache_drop(spa_t *spa);
710 extern int spa_scan(spa_t *spa, pool_scan_func_t func);
711 extern int spa_scan_stop(spa_t *spa);
712 extern int spa_scrub_pause_resume(spa_t *spa, pool_scrub_cmd_t flag);
715 extern void spa_sync(spa_t *spa, uint64_t txg); /* only for DMU use */
716 extern void spa_sync_allpools(void);
718 /* spa namespace global mutex */
719 extern kmutex_t spa_namespace_lock;
722 * SPA configuration functions in spa_config.c
725 #define SPA_CONFIG_UPDATE_POOL 0
726 #define SPA_CONFIG_UPDATE_VDEVS 1
728 extern void spa_write_cachefile(spa_t *, boolean_t, boolean_t);
729 extern void spa_config_load(void);
730 extern nvlist_t *spa_all_configs(uint64_t *);
731 extern void spa_config_set(spa_t *spa, nvlist_t *config);
732 extern nvlist_t *spa_config_generate(spa_t *spa, vdev_t *vd, uint64_t txg,
734 extern void spa_config_update(spa_t *spa, int what);
737 * Miscellaneous SPA routines in spa_misc.c
740 /* Namespace manipulation */
741 extern spa_t *spa_lookup(const char *name);
742 extern spa_t *spa_add(const char *name, nvlist_t *config, const char *altroot);
743 extern void spa_remove(spa_t *spa);
744 extern spa_t *spa_next(spa_t *prev);
746 /* Refcount functions */
747 extern void spa_open_ref(spa_t *spa, void *tag);
748 extern void spa_close(spa_t *spa, void *tag);
749 extern void spa_async_close(spa_t *spa, void *tag);
750 extern boolean_t spa_refcount_zero(spa_t *spa);
752 #define SCL_NONE 0x00
753 #define SCL_CONFIG 0x01
754 #define SCL_STATE 0x02
755 #define SCL_L2ARC 0x04 /* hack until L2ARC 2.0 */
756 #define SCL_ALLOC 0x08
758 #define SCL_FREE 0x20
759 #define SCL_VDEV 0x40
761 #define SCL_ALL ((1 << SCL_LOCKS) - 1)
762 #define SCL_STATE_ALL (SCL_STATE | SCL_L2ARC | SCL_ZIO)
764 /* Pool configuration locks */
765 extern int spa_config_tryenter(spa_t *spa, int locks, void *tag, krw_t rw);
766 extern void spa_config_enter(spa_t *spa, int locks, void *tag, krw_t rw);
767 extern void spa_config_exit(spa_t *spa, int locks, void *tag);
768 extern int spa_config_held(spa_t *spa, int locks, krw_t rw);
770 /* Pool vdev add/remove lock */
771 extern uint64_t spa_vdev_enter(spa_t *spa);
772 extern uint64_t spa_vdev_config_enter(spa_t *spa);
773 extern void spa_vdev_config_exit(spa_t *spa, vdev_t *vd, uint64_t txg,
774 int error, char *tag);
775 extern int spa_vdev_exit(spa_t *spa, vdev_t *vd, uint64_t txg, int error);
777 /* Pool vdev state change lock */
778 extern void spa_vdev_state_enter(spa_t *spa, int oplock);
779 extern int spa_vdev_state_exit(spa_t *spa, vdev_t *vd, int error);
782 typedef enum spa_log_state {
783 SPA_LOG_UNKNOWN = 0, /* unknown log state */
784 SPA_LOG_MISSING, /* missing log(s) */
785 SPA_LOG_CLEAR, /* clear the log(s) */
786 SPA_LOG_GOOD, /* log(s) are good */
789 extern spa_log_state_t spa_get_log_state(spa_t *spa);
790 extern void spa_set_log_state(spa_t *spa, spa_log_state_t state);
791 extern int spa_reset_logs(spa_t *spa);
793 /* Log claim callback */
794 extern void spa_claim_notify(zio_t *zio);
796 /* Accessor functions */
797 extern boolean_t spa_shutting_down(spa_t *spa);
798 extern struct dsl_pool *spa_get_dsl(spa_t *spa);
799 extern boolean_t spa_is_initializing(spa_t *spa);
800 extern boolean_t spa_indirect_vdevs_loaded(spa_t *spa);
801 extern blkptr_t *spa_get_rootblkptr(spa_t *spa);
802 extern void spa_set_rootblkptr(spa_t *spa, const blkptr_t *bp);
803 extern void spa_altroot(spa_t *, char *, size_t);
804 extern int spa_sync_pass(spa_t *spa);
805 extern char *spa_name(spa_t *spa);
806 extern uint64_t spa_guid(spa_t *spa);
807 extern uint64_t spa_load_guid(spa_t *spa);
808 extern uint64_t spa_last_synced_txg(spa_t *spa);
809 extern uint64_t spa_first_txg(spa_t *spa);
810 extern uint64_t spa_syncing_txg(spa_t *spa);
811 extern uint64_t spa_final_dirty_txg(spa_t *spa);
812 extern uint64_t spa_version(spa_t *spa);
813 extern pool_state_t spa_state(spa_t *spa);
814 extern spa_load_state_t spa_load_state(spa_t *spa);
815 extern uint64_t spa_freeze_txg(spa_t *spa);
816 extern uint64_t spa_get_worst_case_asize(spa_t *spa, uint64_t lsize);
817 extern uint64_t spa_get_dspace(spa_t *spa);
818 extern uint64_t spa_get_checkpoint_space(spa_t *spa);
819 extern uint64_t spa_get_slop_space(spa_t *spa);
820 extern void spa_update_dspace(spa_t *spa);
821 extern uint64_t spa_version(spa_t *spa);
822 extern boolean_t spa_deflate(spa_t *spa);
823 extern metaslab_class_t *spa_normal_class(spa_t *spa);
824 extern metaslab_class_t *spa_log_class(spa_t *spa);
825 extern metaslab_class_t *spa_special_class(spa_t *spa);
826 extern metaslab_class_t *spa_dedup_class(spa_t *spa);
827 extern metaslab_class_t *spa_preferred_class(spa_t *spa, uint64_t size,
828 dmu_object_type_t objtype, uint_t level, uint_t special_smallblk);
830 extern void spa_evicting_os_register(spa_t *, objset_t *os);
831 extern void spa_evicting_os_deregister(spa_t *, objset_t *os);
832 extern void spa_evicting_os_wait(spa_t *spa);
833 extern int spa_max_replication(spa_t *spa);
834 extern int spa_prev_software_version(spa_t *spa);
835 extern int spa_busy(void);
836 extern uint8_t spa_get_failmode(spa_t *spa);
837 extern boolean_t spa_suspended(spa_t *spa);
838 extern uint64_t spa_bootfs(spa_t *spa);
839 extern uint64_t spa_delegation(spa_t *spa);
840 extern objset_t *spa_meta_objset(spa_t *spa);
841 extern uint64_t spa_deadman_synctime(spa_t *spa);
842 extern struct proc *spa_proc(spa_t *spa);
843 extern uint64_t spa_dirty_data(spa_t *spa);
845 /* Miscellaneous support routines */
846 extern void spa_load_failed(spa_t *spa, const char *fmt, ...);
847 extern void spa_load_note(spa_t *spa, const char *fmt, ...);
848 extern void spa_activate_mos_feature(spa_t *spa, const char *feature,
850 extern void spa_deactivate_mos_feature(spa_t *spa, const char *feature);
851 extern spa_t *spa_by_guid(uint64_t pool_guid, uint64_t device_guid);
852 extern boolean_t spa_guid_exists(uint64_t pool_guid, uint64_t device_guid);
853 extern char *spa_strdup(const char *);
854 extern void spa_strfree(char *);
855 extern uint64_t spa_get_random(uint64_t range);
856 extern uint64_t spa_generate_guid(spa_t *spa);
857 extern void snprintf_blkptr(char *buf, size_t buflen, const blkptr_t *bp);
858 extern void spa_freeze(spa_t *spa);
859 extern int spa_change_guid(spa_t *spa);
860 extern void spa_upgrade(spa_t *spa, uint64_t version);
861 extern void spa_evict_all(void);
862 extern vdev_t *spa_lookup_by_guid(spa_t *spa, uint64_t guid,
864 extern boolean_t spa_has_spare(spa_t *, uint64_t guid);
865 extern uint64_t dva_get_dsize_sync(spa_t *spa, const dva_t *dva);
866 extern uint64_t bp_get_dsize_sync(spa_t *spa, const blkptr_t *bp);
867 extern uint64_t bp_get_dsize(spa_t *spa, const blkptr_t *bp);
868 extern boolean_t spa_has_slogs(spa_t *spa);
869 extern boolean_t spa_is_root(spa_t *spa);
870 extern boolean_t spa_writeable(spa_t *spa);
871 extern boolean_t spa_has_pending_synctask(spa_t *spa);
872 extern int spa_maxblocksize(spa_t *spa);
873 extern int spa_maxdnodesize(spa_t *spa);
874 extern boolean_t spa_multihost(spa_t *spa);
875 extern unsigned long spa_get_hostid(void);
876 extern boolean_t spa_has_checkpoint(spa_t *spa);
877 extern boolean_t spa_importing_readonly_checkpoint(spa_t *spa);
878 extern boolean_t spa_suspend_async_destroy(spa_t *spa);
879 extern uint64_t spa_min_claim_txg(spa_t *spa);
880 extern void zfs_blkptr_verify(spa_t *spa, const blkptr_t *bp);
881 extern boolean_t zfs_dva_valid(spa_t *spa, const dva_t *dva,
883 typedef void (*spa_remap_cb_t)(uint64_t vdev, uint64_t offset, uint64_t size,
885 extern boolean_t spa_remap_blkptr(spa_t *spa, blkptr_t *bp,
886 spa_remap_cb_t callback, void *arg);
887 extern uint64_t spa_get_last_removal_txg(spa_t *spa);
888 extern boolean_t spa_trust_config(spa_t *spa);
889 extern uint64_t spa_missing_tvds_allowed(spa_t *spa);
890 extern void spa_set_missing_tvds(spa_t *spa, uint64_t missing);
891 extern boolean_t spa_top_vdevs_spacemap_addressable(spa_t *spa);
892 extern void spa_activate_allocation_classes(spa_t *, dmu_tx_t *);
894 extern int spa_mode(spa_t *spa);
895 extern uint64_t zfs_strtonum(const char *str, char **nptr);
897 extern char *spa_his_ievent_table[];
899 extern void spa_history_create_obj(spa_t *spa, dmu_tx_t *tx);
900 extern int spa_history_get(spa_t *spa, uint64_t *offset, uint64_t *len_read,
902 extern int spa_history_log(spa_t *spa, const char *his_buf);
903 extern int spa_history_log_nvl(spa_t *spa, nvlist_t *nvl);
904 extern void spa_history_log_version(spa_t *spa, const char *operation);
905 extern void spa_history_log_internal(spa_t *spa, const char *operation,
906 dmu_tx_t *tx, const char *fmt, ...);
907 extern void spa_history_log_internal_ds(struct dsl_dataset *ds, const char *op,
908 dmu_tx_t *tx, const char *fmt, ...);
909 extern void spa_history_log_internal_dd(dsl_dir_t *dd, const char *operation,
910 dmu_tx_t *tx, const char *fmt, ...);
913 struct zbookmark_phys;
914 extern void spa_log_error(spa_t *spa, zio_t *zio);
915 extern void zfs_ereport_post(const char *cls, spa_t *spa, vdev_t *vd,
916 zio_t *zio, uint64_t stateoroffset, uint64_t length);
917 extern void zfs_post_remove(spa_t *spa, vdev_t *vd);
918 extern void zfs_post_state_change(spa_t *spa, vdev_t *vd);
919 extern void zfs_post_autoreplace(spa_t *spa, vdev_t *vd);
920 extern uint64_t spa_get_errlog_size(spa_t *spa);
921 extern int spa_get_errlog(spa_t *spa, void *uaddr, size_t *count);
922 extern void spa_errlog_rotate(spa_t *spa);
923 extern void spa_errlog_drain(spa_t *spa);
924 extern void spa_errlog_sync(spa_t *spa, uint64_t txg);
925 extern void spa_get_errlists(spa_t *spa, avl_tree_t *last, avl_tree_t *scrub);
928 extern void vdev_cache_stat_init(void);
929 extern void vdev_cache_stat_fini(void);
931 /* Initialization and termination */
932 extern void spa_init(int flags);
933 extern void spa_fini(void);
934 extern void spa_boot_init(void);
937 extern int spa_prop_set(spa_t *spa, nvlist_t *nvp);
938 extern int spa_prop_get(spa_t *spa, nvlist_t **nvp);
939 extern void spa_prop_clear_bootfs(spa_t *spa, uint64_t obj, dmu_tx_t *tx);
940 extern void spa_configfile_set(spa_t *, nvlist_t *, boolean_t);
942 /* asynchronous event notification */
943 extern void spa_event_notify(spa_t *spa, vdev_t *vdev, nvlist_t *hist_nvl,
945 extern sysevent_t *spa_event_create(spa_t *spa, vdev_t *vd, nvlist_t *hist_nvl,
947 extern void spa_event_post(sysevent_t *ev);
948 extern void spa_event_discard(sysevent_t *ev);
951 #define dprintf_bp(bp, fmt, ...) do { \
952 if (zfs_flags & ZFS_DEBUG_DPRINTF) { \
953 char *__blkbuf = kmem_alloc(BP_SPRINTF_LEN, KM_SLEEP); \
954 snprintf_blkptr(__blkbuf, BP_SPRINTF_LEN, (bp)); \
955 dprintf(fmt " %s\n", __VA_ARGS__, __blkbuf); \
956 kmem_free(__blkbuf, BP_SPRINTF_LEN); \
958 _NOTE(CONSTCOND) } while (0)
960 #define dprintf_bp(bp, fmt, ...)
963 extern int spa_mode_global; /* mode, e.g. FREAD | FWRITE */
969 #endif /* _SYS_SPA_H */