1fa9e4066Sahrens /* 2fa9e4066Sahrens * CDDL HEADER START 3fa9e4066Sahrens * 4fa9e4066Sahrens * The contents of this file are subject to the terms of the 5fa9e4066Sahrens * Common Development and Distribution License, Version 1.0 only 6fa9e4066Sahrens * (the "License"). You may not use this file except in compliance 7fa9e4066Sahrens * with the License. 8fa9e4066Sahrens * 9fa9e4066Sahrens * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10fa9e4066Sahrens * or http://www.opensolaris.org/os/licensing. 11fa9e4066Sahrens * See the License for the specific language governing permissions 12fa9e4066Sahrens * and limitations under the License. 13fa9e4066Sahrens * 14fa9e4066Sahrens * When distributing Covered Code, include this CDDL HEADER in each 15fa9e4066Sahrens * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16fa9e4066Sahrens * If applicable, add the following below this CDDL HEADER, with the 17fa9e4066Sahrens * fields enclosed by brackets "[]" replaced with your own identifying 18fa9e4066Sahrens * information: Portions Copyright [yyyy] [name of copyright owner] 19fa9e4066Sahrens * 20fa9e4066Sahrens * CDDL HEADER END 21fa9e4066Sahrens */ 22fa9e4066Sahrens /* 23*c67d9675Seschrock * Copyright 2006 Sun Microsystems, Inc. All rights reserved. 24fa9e4066Sahrens * Use is subject to license terms. 25fa9e4066Sahrens */ 26fa9e4066Sahrens 27fa9e4066Sahrens #ifndef _SYS_SPA_H 28fa9e4066Sahrens #define _SYS_SPA_H 29fa9e4066Sahrens 30fa9e4066Sahrens #pragma ident "%Z%%M% %I% %E% SMI" 31fa9e4066Sahrens 32fa9e4066Sahrens #include <sys/avl.h> 33fa9e4066Sahrens #include <sys/zfs_context.h> 34fa9e4066Sahrens #include <sys/nvpair.h> 35fa9e4066Sahrens #include <sys/sysmacros.h> 36fa9e4066Sahrens #include <sys/types.h> 37fa9e4066Sahrens #include <sys/fs/zfs.h> 38fa9e4066Sahrens 39fa9e4066Sahrens #ifdef __cplusplus 40fa9e4066Sahrens extern "C" { 41fa9e4066Sahrens #endif 42fa9e4066Sahrens 43fa9e4066Sahrens /* 44fa9e4066Sahrens * Forward references that lots of things need. 45fa9e4066Sahrens */ 46fa9e4066Sahrens typedef struct spa spa_t; 47fa9e4066Sahrens typedef struct vdev vdev_t; 48fa9e4066Sahrens typedef struct metaslab metaslab_t; 49fa9e4066Sahrens typedef struct zilog zilog_t; 50fa9e4066Sahrens typedef struct traverse_handle traverse_handle_t; 51fa9e4066Sahrens struct dsl_pool; 52fa9e4066Sahrens 53fa9e4066Sahrens /* 54fa9e4066Sahrens * General-purpose 32-bit and 64-bit bitfield encodings. 55fa9e4066Sahrens */ 56fa9e4066Sahrens #define BF32_DECODE(x, low, len) P2PHASE((x) >> (low), 1U << (len)) 57fa9e4066Sahrens #define BF64_DECODE(x, low, len) P2PHASE((x) >> (low), 1ULL << (len)) 58fa9e4066Sahrens #define BF32_ENCODE(x, low, len) (P2PHASE((x), 1U << (len)) << (low)) 59fa9e4066Sahrens #define BF64_ENCODE(x, low, len) (P2PHASE((x), 1ULL << (len)) << (low)) 60fa9e4066Sahrens 61fa9e4066Sahrens #define BF32_GET(x, low, len) BF32_DECODE(x, low, len) 62fa9e4066Sahrens #define BF64_GET(x, low, len) BF64_DECODE(x, low, len) 63fa9e4066Sahrens 64fa9e4066Sahrens #define BF32_SET(x, low, len, val) \ 65fa9e4066Sahrens ((x) ^= BF32_ENCODE((x >> low) ^ val, low, len)) 66fa9e4066Sahrens #define BF64_SET(x, low, len, val) \ 67fa9e4066Sahrens ((x) ^= BF64_ENCODE((x >> low) ^ val, low, len)) 68fa9e4066Sahrens 69fa9e4066Sahrens #define BF32_GET_SB(x, low, len, shift, bias) \ 70fa9e4066Sahrens ((BF32_GET(x, low, len) + (bias)) << (shift)) 71fa9e4066Sahrens #define BF64_GET_SB(x, low, len, shift, bias) \ 72fa9e4066Sahrens ((BF64_GET(x, low, len) + (bias)) << (shift)) 73fa9e4066Sahrens 74fa9e4066Sahrens #define BF32_SET_SB(x, low, len, shift, bias, val) \ 75fa9e4066Sahrens BF32_SET(x, low, len, ((val) >> (shift)) - (bias)) 76fa9e4066Sahrens #define BF64_SET_SB(x, low, len, shift, bias, val) \ 77fa9e4066Sahrens BF64_SET(x, low, len, ((val) >> (shift)) - (bias)) 78fa9e4066Sahrens 79fa9e4066Sahrens /* 80fa9e4066Sahrens * We currently support nine block sizes, from 512 bytes to 128K. 81fa9e4066Sahrens * We could go higher, but the benefits are near-zero and the cost 82fa9e4066Sahrens * of COWing a giant block to modify one byte would become excessive. 83fa9e4066Sahrens */ 84fa9e4066Sahrens #define SPA_MINBLOCKSHIFT 9 85fa9e4066Sahrens #define SPA_MAXBLOCKSHIFT 17 86fa9e4066Sahrens #define SPA_MINBLOCKSIZE (1ULL << SPA_MINBLOCKSHIFT) 87fa9e4066Sahrens #define SPA_MAXBLOCKSIZE (1ULL << SPA_MAXBLOCKSHIFT) 88fa9e4066Sahrens 89fa9e4066Sahrens #define SPA_BLOCKSIZES (SPA_MAXBLOCKSHIFT - SPA_MINBLOCKSHIFT + 1) 90fa9e4066Sahrens 91fa9e4066Sahrens /* 92fa9e4066Sahrens * The DVA size encodings for LSIZE and PSIZE support blocks up to 32MB. 93fa9e4066Sahrens * The ASIZE encoding should be at least 64 times larger (6 more bits) 94fa9e4066Sahrens * to support up to 4-way RAID-Z mirror mode with worst-case gang block 95fa9e4066Sahrens * overhead, three DVAs per bp, plus one more bit in case we do anything 96fa9e4066Sahrens * else that expands the ASIZE. 97fa9e4066Sahrens */ 98fa9e4066Sahrens #define SPA_LSIZEBITS 16 /* LSIZE up to 32M (2^16 * 512) */ 99fa9e4066Sahrens #define SPA_PSIZEBITS 16 /* PSIZE up to 32M (2^16 * 512) */ 100fa9e4066Sahrens #define SPA_ASIZEBITS 24 /* ASIZE up to 64 times larger */ 101fa9e4066Sahrens 102fa9e4066Sahrens /* 103fa9e4066Sahrens * All SPA data is represented by 128-bit data virtual addresses (DVAs). 104fa9e4066Sahrens * The members of the dva_t should be considered opaque outside the SPA. 105fa9e4066Sahrens */ 106fa9e4066Sahrens typedef struct dva { 107fa9e4066Sahrens uint64_t dva_word[2]; 108fa9e4066Sahrens } dva_t; 109fa9e4066Sahrens 110fa9e4066Sahrens /* 111fa9e4066Sahrens * Each block has a 256-bit checksum -- strong enough for cryptographic hashes. 112fa9e4066Sahrens */ 113fa9e4066Sahrens typedef struct zio_cksum { 114fa9e4066Sahrens uint64_t zc_word[4]; 115fa9e4066Sahrens } zio_cksum_t; 116fa9e4066Sahrens 117fa9e4066Sahrens /* 118fa9e4066Sahrens * Each block is described by its DVAs, time of birth, checksum, etc. 119fa9e4066Sahrens * The word-by-word, bit-by-bit layout of the blkptr is as follows: 120fa9e4066Sahrens * 121fa9e4066Sahrens * 64 56 48 40 32 24 16 8 0 122fa9e4066Sahrens * +-------+-------+-------+-------+-------+-------+-------+-------+ 123fa9e4066Sahrens * 0 | vdev1 | GRID | ASIZE | 124fa9e4066Sahrens * +-------+-------+-------+-------+-------+-------+-------+-------+ 125fa9e4066Sahrens * 1 |G| offset1 | 126fa9e4066Sahrens * +-------+-------+-------+-------+-------+-------+-------+-------+ 127fa9e4066Sahrens * 2 | vdev2 | GRID | ASIZE | 128fa9e4066Sahrens * +-------+-------+-------+-------+-------+-------+-------+-------+ 129fa9e4066Sahrens * 3 |G| offset2 | 130fa9e4066Sahrens * +-------+-------+-------+-------+-------+-------+-------+-------+ 131fa9e4066Sahrens * 4 | vdev3 | GRID | ASIZE | 132fa9e4066Sahrens * +-------+-------+-------+-------+-------+-------+-------+-------+ 133fa9e4066Sahrens * 5 |G| offset3 | 134fa9e4066Sahrens * +-------+-------+-------+-------+-------+-------+-------+-------+ 135fa9e4066Sahrens * 6 |E| lvl | type | cksum | comp | PSIZE | LSIZE | 136fa9e4066Sahrens * +-------+-------+-------+-------+-------+-------+-------+-------+ 137fa9e4066Sahrens * 7 | padding | 138fa9e4066Sahrens * +-------+-------+-------+-------+-------+-------+-------+-------+ 139fa9e4066Sahrens * 8 | padding | 140fa9e4066Sahrens * +-------+-------+-------+-------+-------+-------+-------+-------+ 141fa9e4066Sahrens * 9 | padding | 142fa9e4066Sahrens * +-------+-------+-------+-------+-------+-------+-------+-------+ 143fa9e4066Sahrens * a | birth txg | 144fa9e4066Sahrens * +-------+-------+-------+-------+-------+-------+-------+-------+ 145fa9e4066Sahrens * b | fill count | 146fa9e4066Sahrens * +-------+-------+-------+-------+-------+-------+-------+-------+ 147fa9e4066Sahrens * c | checksum[0] | 148fa9e4066Sahrens * +-------+-------+-------+-------+-------+-------+-------+-------+ 149fa9e4066Sahrens * d | checksum[1] | 150fa9e4066Sahrens * +-------+-------+-------+-------+-------+-------+-------+-------+ 151fa9e4066Sahrens * e | checksum[2] | 152fa9e4066Sahrens * +-------+-------+-------+-------+-------+-------+-------+-------+ 153fa9e4066Sahrens * f | checksum[3] | 154fa9e4066Sahrens * +-------+-------+-------+-------+-------+-------+-------+-------+ 155fa9e4066Sahrens * 156fa9e4066Sahrens * Legend: 157fa9e4066Sahrens * 158fa9e4066Sahrens * vdev virtual device ID 159fa9e4066Sahrens * offset offset into virtual device 160fa9e4066Sahrens * LSIZE logical size 161fa9e4066Sahrens * PSIZE physical size (after compression) 162fa9e4066Sahrens * ASIZE allocated size (including RAID-Z parity and gang block headers) 163fa9e4066Sahrens * GRID RAID-Z layout information (reserved for future use) 164fa9e4066Sahrens * cksum checksum function 165fa9e4066Sahrens * comp compression function 166fa9e4066Sahrens * G gang block indicator 167fa9e4066Sahrens * E endianness 168fa9e4066Sahrens * type DMU object type 169fa9e4066Sahrens * lvl level of indirection 170fa9e4066Sahrens * birth txg transaction group in which the block was born 171fa9e4066Sahrens * fill count number of non-zero blocks under this bp 172fa9e4066Sahrens * checksum[4] 256-bit checksum of the data this bp describes 173fa9e4066Sahrens */ 174fa9e4066Sahrens typedef struct blkptr { 175fa9e4066Sahrens dva_t blk_dva[3]; /* 128-bit Data Virtual Address */ 176fa9e4066Sahrens uint64_t blk_prop; /* size, compression, type, etc */ 177fa9e4066Sahrens uint64_t blk_pad[3]; /* Extra space for the future */ 178fa9e4066Sahrens uint64_t blk_birth; /* transaction group at birth */ 179fa9e4066Sahrens uint64_t blk_fill; /* fill count */ 180fa9e4066Sahrens zio_cksum_t blk_cksum; /* 256-bit checksum */ 181fa9e4066Sahrens } blkptr_t; 182fa9e4066Sahrens 183fa9e4066Sahrens #define SPA_BLKPTRSHIFT 7 /* blkptr_t is 128 bytes */ 184fa9e4066Sahrens #define SPA_DVAS_PER_BP 3 /* Number of DVAs in a bp */ 185fa9e4066Sahrens 186fa9e4066Sahrens /* 187fa9e4066Sahrens * Macros to get and set fields in a bp or DVA. 188fa9e4066Sahrens */ 189fa9e4066Sahrens #define DVA_GET_ASIZE(dva) \ 190fa9e4066Sahrens BF64_GET_SB((dva)->dva_word[0], 0, 24, SPA_MINBLOCKSHIFT, 0) 191fa9e4066Sahrens #define DVA_SET_ASIZE(dva, x) \ 192fa9e4066Sahrens BF64_SET_SB((dva)->dva_word[0], 0, 24, SPA_MINBLOCKSHIFT, 0, x) 193fa9e4066Sahrens 194fa9e4066Sahrens #define DVA_GET_GRID(dva) BF64_GET((dva)->dva_word[0], 24, 8) 195fa9e4066Sahrens #define DVA_SET_GRID(dva, x) BF64_SET((dva)->dva_word[0], 24, 8, x) 196fa9e4066Sahrens 197fa9e4066Sahrens #define DVA_GET_VDEV(dva) BF64_GET((dva)->dva_word[0], 32, 32) 198fa9e4066Sahrens #define DVA_SET_VDEV(dva, x) BF64_SET((dva)->dva_word[0], 32, 32, x) 199fa9e4066Sahrens 200fa9e4066Sahrens #define DVA_GET_OFFSET(dva) \ 201fa9e4066Sahrens BF64_GET_SB((dva)->dva_word[1], 0, 63, SPA_MINBLOCKSHIFT, 0) 202fa9e4066Sahrens #define DVA_SET_OFFSET(dva, x) \ 203fa9e4066Sahrens BF64_SET_SB((dva)->dva_word[1], 0, 63, SPA_MINBLOCKSHIFT, 0, x) 204fa9e4066Sahrens 205fa9e4066Sahrens #define DVA_GET_GANG(dva) BF64_GET((dva)->dva_word[1], 63, 1) 206fa9e4066Sahrens #define DVA_SET_GANG(dva, x) BF64_SET((dva)->dva_word[1], 63, 1, x) 207fa9e4066Sahrens 208fa9e4066Sahrens #define BP_GET_LSIZE(bp) \ 209fa9e4066Sahrens (BP_IS_HOLE(bp) ? 0 : \ 210fa9e4066Sahrens BF64_GET_SB((bp)->blk_prop, 0, 16, SPA_MINBLOCKSHIFT, 1)) 211fa9e4066Sahrens #define BP_SET_LSIZE(bp, x) \ 212fa9e4066Sahrens BF64_SET_SB((bp)->blk_prop, 0, 16, SPA_MINBLOCKSHIFT, 1, x) 213fa9e4066Sahrens 214fa9e4066Sahrens #define BP_GET_PSIZE(bp) \ 215fa9e4066Sahrens BF64_GET_SB((bp)->blk_prop, 16, 16, SPA_MINBLOCKSHIFT, 1) 216fa9e4066Sahrens #define BP_SET_PSIZE(bp, x) \ 217fa9e4066Sahrens BF64_SET_SB((bp)->blk_prop, 16, 16, SPA_MINBLOCKSHIFT, 1, x) 218fa9e4066Sahrens 219fa9e4066Sahrens #define BP_GET_COMPRESS(bp) BF64_GET((bp)->blk_prop, 32, 8) 220fa9e4066Sahrens #define BP_SET_COMPRESS(bp, x) BF64_SET((bp)->blk_prop, 32, 8, x) 221fa9e4066Sahrens 222fa9e4066Sahrens #define BP_GET_CHECKSUM(bp) BF64_GET((bp)->blk_prop, 40, 8) 223fa9e4066Sahrens #define BP_SET_CHECKSUM(bp, x) BF64_SET((bp)->blk_prop, 40, 8, x) 224fa9e4066Sahrens 225fa9e4066Sahrens #define BP_GET_TYPE(bp) BF64_GET((bp)->blk_prop, 48, 8) 226fa9e4066Sahrens #define BP_SET_TYPE(bp, x) BF64_SET((bp)->blk_prop, 48, 8, x) 227fa9e4066Sahrens 228fa9e4066Sahrens #define BP_GET_LEVEL(bp) BF64_GET((bp)->blk_prop, 56, 5) 229fa9e4066Sahrens #define BP_SET_LEVEL(bp, x) BF64_SET((bp)->blk_prop, 56, 5, x) 230fa9e4066Sahrens 231fa9e4066Sahrens #define BP_GET_BYTEORDER(bp) (0 - BF64_GET((bp)->blk_prop, 63, 1)) 232fa9e4066Sahrens #define BP_SET_BYTEORDER(bp, x) BF64_SET((bp)->blk_prop, 63, 1, x) 233fa9e4066Sahrens 234fa9e4066Sahrens #define BP_GET_ASIZE(bp) \ 235fa9e4066Sahrens (DVA_GET_ASIZE(&(bp)->blk_dva[0]) + DVA_GET_ASIZE(&(bp)->blk_dva[1]) + \ 236fa9e4066Sahrens DVA_GET_ASIZE(&(bp)->blk_dva[2])) 237fa9e4066Sahrens 238fa9e4066Sahrens #define DVA_EQUAL(dva1, dva2) \ 239fa9e4066Sahrens ((dva1)->dva_word[1] == (dva2)->dva_word[1] && \ 240fa9e4066Sahrens (dva1)->dva_word[0] == (dva2)->dva_word[0]) 241fa9e4066Sahrens 242fa9e4066Sahrens #define DVA_IS_VALID(dva) (DVA_GET_ASIZE(dva) != 0) 243fa9e4066Sahrens 244fa9e4066Sahrens #define ZIO_SET_CHECKSUM(zcp, w0, w1, w2, w3) \ 245fa9e4066Sahrens { \ 246fa9e4066Sahrens (zcp)->zc_word[0] = w0; \ 247fa9e4066Sahrens (zcp)->zc_word[1] = w1; \ 248fa9e4066Sahrens (zcp)->zc_word[2] = w2; \ 249fa9e4066Sahrens (zcp)->zc_word[3] = w3; \ 250fa9e4066Sahrens } 251fa9e4066Sahrens 252fa9e4066Sahrens #define BP_IS_HOLE(bp) ((bp)->blk_birth == 0) 253fa9e4066Sahrens 254fa9e4066Sahrens #define BP_IDENTITY(bp) (&(bp)->blk_dva[0]) 255fa9e4066Sahrens 256fa9e4066Sahrens #define BP_ZERO(bp) \ 257fa9e4066Sahrens { \ 258fa9e4066Sahrens (bp)->blk_dva[0].dva_word[0] = 0; \ 259fa9e4066Sahrens (bp)->blk_dva[0].dva_word[1] = 0; \ 260fa9e4066Sahrens (bp)->blk_dva[1].dva_word[0] = 0; \ 261fa9e4066Sahrens (bp)->blk_dva[1].dva_word[1] = 0; \ 262fa9e4066Sahrens (bp)->blk_dva[2].dva_word[0] = 0; \ 263fa9e4066Sahrens (bp)->blk_dva[2].dva_word[1] = 0; \ 264fa9e4066Sahrens (bp)->blk_prop = 0; \ 265fa9e4066Sahrens (bp)->blk_pad[0] = 0; \ 266fa9e4066Sahrens (bp)->blk_pad[1] = 0; \ 267fa9e4066Sahrens (bp)->blk_pad[2] = 0; \ 268fa9e4066Sahrens (bp)->blk_birth = 0; \ 269fa9e4066Sahrens (bp)->blk_fill = 0; \ 270fa9e4066Sahrens ZIO_SET_CHECKSUM(&(bp)->blk_cksum, 0, 0, 0, 0); \ 271fa9e4066Sahrens } 272fa9e4066Sahrens 273fa9e4066Sahrens /* 274fa9e4066Sahrens * Note: the byteorder is either 0 or -1, both of which are palindromes. 275fa9e4066Sahrens * This simplifies the endianness handling a bit. 276fa9e4066Sahrens */ 277fa9e4066Sahrens #ifdef _BIG_ENDIAN 278fa9e4066Sahrens #define ZFS_HOST_BYTEORDER (0ULL) 279fa9e4066Sahrens #else 280fa9e4066Sahrens #define ZFS_HOST_BYTEORDER (-1ULL) 281fa9e4066Sahrens #endif 282fa9e4066Sahrens 283fa9e4066Sahrens #define BP_SHOULD_BYTESWAP(bp) (BP_GET_BYTEORDER(bp) != ZFS_HOST_BYTEORDER) 284fa9e4066Sahrens 285fbabab8fSmaybee #define BP_SPRINTF_LEN 256 286fbabab8fSmaybee 287fa9e4066Sahrens #include <sys/dmu.h> 288fa9e4066Sahrens 289fa9e4066Sahrens /* 290fa9e4066Sahrens * Routines found in spa.c 291fa9e4066Sahrens */ 292fa9e4066Sahrens 293fa9e4066Sahrens /* state manipulation functions */ 294fa9e4066Sahrens extern int spa_open(const char *pool, spa_t **, void *tag); 295fa9e4066Sahrens extern int spa_get_stats(const char *pool, nvlist_t **config); 296fa9e4066Sahrens extern int spa_create(const char *pool, nvlist_t *config, char *altroot); 297fa9e4066Sahrens extern int spa_import(const char *pool, nvlist_t *config, char *altroot); 298fa9e4066Sahrens extern nvlist_t *spa_tryimport(nvlist_t *tryconfig); 299fa9e4066Sahrens extern int spa_destroy(char *pool); 300fa9e4066Sahrens extern int spa_export(char *pool); 301fa9e4066Sahrens 302fa9e4066Sahrens /* device manipulation */ 303fa9e4066Sahrens extern int spa_vdev_add(spa_t *spa, nvlist_t *nvroot); 304fa9e4066Sahrens extern int spa_vdev_add_unlocked(spa_t *spa, nvlist_t *nvroot); 305fa9e4066Sahrens extern int spa_vdev_attach(spa_t *spa, const char *path, nvlist_t *nvroot, 306fa9e4066Sahrens int replacing); 307fa9e4066Sahrens extern int spa_vdev_detach(spa_t *spa, const char *path, uint64_t guid, 308fa9e4066Sahrens int replace_done); 309fa9e4066Sahrens extern void spa_vdev_replace_done(spa_t *spa); 310*c67d9675Seschrock extern int spa_vdev_setpath(spa_t *spa, uint64_t guid, const char *newpath); 311fa9e4066Sahrens 312fa9e4066Sahrens /* scrubbing */ 313fa9e4066Sahrens extern int spa_scrub(spa_t *spa, pool_scrub_type_t type, boolean_t force); 314fa9e4066Sahrens extern void spa_scrub_suspend(spa_t *spa); 315fa9e4066Sahrens extern void spa_scrub_resume(spa_t *spa); 316fa9e4066Sahrens extern void spa_scrub_restart(spa_t *spa, uint64_t txg); 317fa9e4066Sahrens 318fa9e4066Sahrens /* spa syncing */ 319fa9e4066Sahrens extern void spa_sync(spa_t *spa, uint64_t txg); /* only for DMU use */ 320fa9e4066Sahrens extern void spa_sync_allpools(void); 321fa9e4066Sahrens 322fa9e4066Sahrens /* 323fa9e4066Sahrens * SPA configuration functions in spa_config.c 324fa9e4066Sahrens */ 325fa9e4066Sahrens extern void spa_config_sync(void); 326fa9e4066Sahrens extern void spa_config_load(void); 327fa9e4066Sahrens extern nvlist_t *spa_all_configs(uint64_t *); 328fa9e4066Sahrens extern void spa_config_set(spa_t *spa, nvlist_t *config); 329fa9e4066Sahrens extern nvlist_t *spa_config_generate(spa_t *spa, vdev_t *vd, uint64_t txg, 330fa9e4066Sahrens int getstats); 331fa9e4066Sahrens 332fa9e4066Sahrens /* 333fa9e4066Sahrens * Miscellaneous SPA routines in spa_misc.c 334fa9e4066Sahrens */ 335fa9e4066Sahrens 336fa9e4066Sahrens /* Namespace manipulation */ 337fa9e4066Sahrens extern spa_t *spa_lookup(const char *name); 338fa9e4066Sahrens extern spa_t *spa_add(const char *name); 339fa9e4066Sahrens extern void spa_remove(spa_t *spa); 340fa9e4066Sahrens extern spa_t *spa_next(spa_t *prev); 341fa9e4066Sahrens 342fa9e4066Sahrens /* Refcount functions */ 343fa9e4066Sahrens extern void spa_open_ref(spa_t *spa, void *tag); 344fa9e4066Sahrens extern void spa_close(spa_t *spa, void *tag); 345fa9e4066Sahrens extern boolean_t spa_refcount_zero(spa_t *spa); 346fa9e4066Sahrens 347fa9e4066Sahrens /* Pool configuration lock */ 348fa9e4066Sahrens extern void spa_config_enter(spa_t *spa, krw_t rw); 349fa9e4066Sahrens extern void spa_config_exit(spa_t *spa); 350fa9e4066Sahrens extern boolean_t spa_config_held(spa_t *spa, krw_t rw); 351fa9e4066Sahrens 352fa9e4066Sahrens /* Pool vdev add/remove lock */ 353fa9e4066Sahrens extern uint64_t spa_vdev_enter(spa_t *spa); 354fa9e4066Sahrens extern int spa_vdev_exit(spa_t *spa, vdev_t *vd, uint64_t txg, int error); 355fa9e4066Sahrens 356fa9e4066Sahrens /* Accessor functions */ 357fa9e4066Sahrens extern krwlock_t *spa_traverse_rwlock(spa_t *spa); 358fa9e4066Sahrens extern int spa_traverse_wanted(spa_t *spa); 359fa9e4066Sahrens extern struct dsl_pool *spa_get_dsl(spa_t *spa); 360fa9e4066Sahrens extern blkptr_t *spa_get_rootblkptr(spa_t *spa); 361fa9e4066Sahrens extern void spa_set_rootblkptr(spa_t *spa, const blkptr_t *bp); 362fa9e4066Sahrens extern void spa_altroot(spa_t *, char *, size_t); 363fa9e4066Sahrens extern int spa_sync_pass(spa_t *spa); 364fa9e4066Sahrens extern char *spa_name(spa_t *spa); 365fa9e4066Sahrens extern uint64_t spa_guid(spa_t *spa); 366fa9e4066Sahrens extern uint64_t spa_last_synced_txg(spa_t *spa); 367fa9e4066Sahrens extern uint64_t spa_first_txg(spa_t *spa); 368fa9e4066Sahrens extern int spa_state(spa_t *spa); 369fa9e4066Sahrens extern uint64_t spa_freeze_txg(spa_t *spa); 370fa9e4066Sahrens struct metaslab_class; 371fa9e4066Sahrens extern struct metaslab_class *spa_metaslab_class_select(spa_t *spa); 372fa9e4066Sahrens extern uint64_t spa_get_alloc(spa_t *spa); 373fa9e4066Sahrens extern uint64_t spa_get_space(spa_t *spa); 374fa9e4066Sahrens extern uint64_t spa_get_asize(spa_t *spa, uint64_t lsize); 375fa9e4066Sahrens extern int spa_busy(void); 376fa9e4066Sahrens 377fa9e4066Sahrens /* Miscellaneous support routines */ 378fa9e4066Sahrens extern int spa_rename(const char *oldname, const char *newname); 379fa9e4066Sahrens extern boolean_t spa_guid_exists(uint64_t pool_guid, uint64_t device_guid); 380fa9e4066Sahrens extern char *spa_strdup(const char *); 381fa9e4066Sahrens extern void spa_strfree(char *); 382fa9e4066Sahrens extern uint64_t spa_get_random(uint64_t range); 383fbabab8fSmaybee extern void sprintf_blkptr(char *buf, int len, blkptr_t *bp); 384fa9e4066Sahrens extern void spa_freeze(spa_t *spa); 385fa9e4066Sahrens extern void spa_evict_all(void); 386fa9e4066Sahrens 387fa9e4066Sahrens /* Initialization and termination */ 388fa9e4066Sahrens extern void spa_init(int flags); 389fa9e4066Sahrens extern void spa_fini(void); 390fa9e4066Sahrens 391fa9e4066Sahrens #ifdef ZFS_DEBUG 392fa9e4066Sahrens #define dprintf_bp(bp, fmt, ...) do { \ 393fbabab8fSmaybee if (zfs_flags & ZFS_DEBUG_DPRINTF) { \ 394fbabab8fSmaybee char __blkbuf[BP_SPRINTF_LEN]; \ 395fbabab8fSmaybee sprintf_blkptr(__blkbuf, BP_SPRINTF_LEN, (bp)); \ 396fa9e4066Sahrens dprintf(fmt " %s\n", __VA_ARGS__, __blkbuf); \ 397fa9e4066Sahrens } \ 398fa9e4066Sahrens _NOTE(CONSTCOND) } while (0) 399fa9e4066Sahrens #else 400fa9e4066Sahrens #define dprintf_bp(bp, fmt, ...) 401fa9e4066Sahrens #endif 402fa9e4066Sahrens 403fa9e4066Sahrens extern int spa_mode; /* mode, e.g. FREAD | FWRITE */ 404fa9e4066Sahrens 405fa9e4066Sahrens #ifdef __cplusplus 406fa9e4066Sahrens } 407fa9e4066Sahrens #endif 408fa9e4066Sahrens 409fa9e4066Sahrens #endif /* _SYS_SPA_H */ 410