1*fa9e4066Sahrens /* 2*fa9e4066Sahrens * CDDL HEADER START 3*fa9e4066Sahrens * 4*fa9e4066Sahrens * The contents of this file are subject to the terms of the 5*fa9e4066Sahrens * Common Development and Distribution License, Version 1.0 only 6*fa9e4066Sahrens * (the "License"). You may not use this file except in compliance 7*fa9e4066Sahrens * with the License. 8*fa9e4066Sahrens * 9*fa9e4066Sahrens * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10*fa9e4066Sahrens * or http://www.opensolaris.org/os/licensing. 11*fa9e4066Sahrens * See the License for the specific language governing permissions 12*fa9e4066Sahrens * and limitations under the License. 13*fa9e4066Sahrens * 14*fa9e4066Sahrens * When distributing Covered Code, include this CDDL HEADER in each 15*fa9e4066Sahrens * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16*fa9e4066Sahrens * If applicable, add the following below this CDDL HEADER, with the 17*fa9e4066Sahrens * fields enclosed by brackets "[]" replaced with your own identifying 18*fa9e4066Sahrens * information: Portions Copyright [yyyy] [name of copyright owner] 19*fa9e4066Sahrens * 20*fa9e4066Sahrens * CDDL HEADER END 21*fa9e4066Sahrens */ 22*fa9e4066Sahrens /* 23*fa9e4066Sahrens * Copyright 2005 Sun Microsystems, Inc. All rights reserved. 24*fa9e4066Sahrens * Use is subject to license terms. 25*fa9e4066Sahrens */ 26*fa9e4066Sahrens 27*fa9e4066Sahrens #ifndef _SYS_SPA_H 28*fa9e4066Sahrens #define _SYS_SPA_H 29*fa9e4066Sahrens 30*fa9e4066Sahrens #pragma ident "%Z%%M% %I% %E% SMI" 31*fa9e4066Sahrens 32*fa9e4066Sahrens #include <sys/avl.h> 33*fa9e4066Sahrens #include <sys/zfs_context.h> 34*fa9e4066Sahrens #include <sys/nvpair.h> 35*fa9e4066Sahrens #include <sys/sysmacros.h> 36*fa9e4066Sahrens #include <sys/types.h> 37*fa9e4066Sahrens #include <sys/fs/zfs.h> 38*fa9e4066Sahrens 39*fa9e4066Sahrens #ifdef __cplusplus 40*fa9e4066Sahrens extern "C" { 41*fa9e4066Sahrens #endif 42*fa9e4066Sahrens 43*fa9e4066Sahrens /* 44*fa9e4066Sahrens * Forward references that lots of things need. 45*fa9e4066Sahrens */ 46*fa9e4066Sahrens typedef struct spa spa_t; 47*fa9e4066Sahrens typedef struct vdev vdev_t; 48*fa9e4066Sahrens typedef struct metaslab metaslab_t; 49*fa9e4066Sahrens typedef struct zilog zilog_t; 50*fa9e4066Sahrens typedef struct traverse_handle traverse_handle_t; 51*fa9e4066Sahrens struct dsl_pool; 52*fa9e4066Sahrens 53*fa9e4066Sahrens /* 54*fa9e4066Sahrens * General-purpose 32-bit and 64-bit bitfield encodings. 55*fa9e4066Sahrens */ 56*fa9e4066Sahrens #define BF32_DECODE(x, low, len) P2PHASE((x) >> (low), 1U << (len)) 57*fa9e4066Sahrens #define BF64_DECODE(x, low, len) P2PHASE((x) >> (low), 1ULL << (len)) 58*fa9e4066Sahrens #define BF32_ENCODE(x, low, len) (P2PHASE((x), 1U << (len)) << (low)) 59*fa9e4066Sahrens #define BF64_ENCODE(x, low, len) (P2PHASE((x), 1ULL << (len)) << (low)) 60*fa9e4066Sahrens 61*fa9e4066Sahrens #define BF32_GET(x, low, len) BF32_DECODE(x, low, len) 62*fa9e4066Sahrens #define BF64_GET(x, low, len) BF64_DECODE(x, low, len) 63*fa9e4066Sahrens 64*fa9e4066Sahrens #define BF32_SET(x, low, len, val) \ 65*fa9e4066Sahrens ((x) ^= BF32_ENCODE((x >> low) ^ val, low, len)) 66*fa9e4066Sahrens #define BF64_SET(x, low, len, val) \ 67*fa9e4066Sahrens ((x) ^= BF64_ENCODE((x >> low) ^ val, low, len)) 68*fa9e4066Sahrens 69*fa9e4066Sahrens #define BF32_GET_SB(x, low, len, shift, bias) \ 70*fa9e4066Sahrens ((BF32_GET(x, low, len) + (bias)) << (shift)) 71*fa9e4066Sahrens #define BF64_GET_SB(x, low, len, shift, bias) \ 72*fa9e4066Sahrens ((BF64_GET(x, low, len) + (bias)) << (shift)) 73*fa9e4066Sahrens 74*fa9e4066Sahrens #define BF32_SET_SB(x, low, len, shift, bias, val) \ 75*fa9e4066Sahrens BF32_SET(x, low, len, ((val) >> (shift)) - (bias)) 76*fa9e4066Sahrens #define BF64_SET_SB(x, low, len, shift, bias, val) \ 77*fa9e4066Sahrens BF64_SET(x, low, len, ((val) >> (shift)) - (bias)) 78*fa9e4066Sahrens 79*fa9e4066Sahrens /* 80*fa9e4066Sahrens * We currently support nine block sizes, from 512 bytes to 128K. 81*fa9e4066Sahrens * We could go higher, but the benefits are near-zero and the cost 82*fa9e4066Sahrens * of COWing a giant block to modify one byte would become excessive. 83*fa9e4066Sahrens */ 84*fa9e4066Sahrens #define SPA_MINBLOCKSHIFT 9 85*fa9e4066Sahrens #define SPA_MAXBLOCKSHIFT 17 86*fa9e4066Sahrens #define SPA_MINBLOCKSIZE (1ULL << SPA_MINBLOCKSHIFT) 87*fa9e4066Sahrens #define SPA_MAXBLOCKSIZE (1ULL << SPA_MAXBLOCKSHIFT) 88*fa9e4066Sahrens 89*fa9e4066Sahrens #define SPA_BLOCKSIZES (SPA_MAXBLOCKSHIFT - SPA_MINBLOCKSHIFT + 1) 90*fa9e4066Sahrens 91*fa9e4066Sahrens /* 92*fa9e4066Sahrens * The DVA size encodings for LSIZE and PSIZE support blocks up to 32MB. 93*fa9e4066Sahrens * The ASIZE encoding should be at least 64 times larger (6 more bits) 94*fa9e4066Sahrens * to support up to 4-way RAID-Z mirror mode with worst-case gang block 95*fa9e4066Sahrens * overhead, three DVAs per bp, plus one more bit in case we do anything 96*fa9e4066Sahrens * else that expands the ASIZE. 97*fa9e4066Sahrens */ 98*fa9e4066Sahrens #define SPA_LSIZEBITS 16 /* LSIZE up to 32M (2^16 * 512) */ 99*fa9e4066Sahrens #define SPA_PSIZEBITS 16 /* PSIZE up to 32M (2^16 * 512) */ 100*fa9e4066Sahrens #define SPA_ASIZEBITS 24 /* ASIZE up to 64 times larger */ 101*fa9e4066Sahrens 102*fa9e4066Sahrens /* 103*fa9e4066Sahrens * All SPA data is represented by 128-bit data virtual addresses (DVAs). 104*fa9e4066Sahrens * The members of the dva_t should be considered opaque outside the SPA. 105*fa9e4066Sahrens */ 106*fa9e4066Sahrens typedef struct dva { 107*fa9e4066Sahrens uint64_t dva_word[2]; 108*fa9e4066Sahrens } dva_t; 109*fa9e4066Sahrens 110*fa9e4066Sahrens /* 111*fa9e4066Sahrens * Each block has a 256-bit checksum -- strong enough for cryptographic hashes. 112*fa9e4066Sahrens */ 113*fa9e4066Sahrens typedef struct zio_cksum { 114*fa9e4066Sahrens uint64_t zc_word[4]; 115*fa9e4066Sahrens } zio_cksum_t; 116*fa9e4066Sahrens 117*fa9e4066Sahrens /* 118*fa9e4066Sahrens * Each block is described by its DVAs, time of birth, checksum, etc. 119*fa9e4066Sahrens * The word-by-word, bit-by-bit layout of the blkptr is as follows: 120*fa9e4066Sahrens * 121*fa9e4066Sahrens * 64 56 48 40 32 24 16 8 0 122*fa9e4066Sahrens * +-------+-------+-------+-------+-------+-------+-------+-------+ 123*fa9e4066Sahrens * 0 | vdev1 | GRID | ASIZE | 124*fa9e4066Sahrens * +-------+-------+-------+-------+-------+-------+-------+-------+ 125*fa9e4066Sahrens * 1 |G| offset1 | 126*fa9e4066Sahrens * +-------+-------+-------+-------+-------+-------+-------+-------+ 127*fa9e4066Sahrens * 2 | vdev2 | GRID | ASIZE | 128*fa9e4066Sahrens * +-------+-------+-------+-------+-------+-------+-------+-------+ 129*fa9e4066Sahrens * 3 |G| offset2 | 130*fa9e4066Sahrens * +-------+-------+-------+-------+-------+-------+-------+-------+ 131*fa9e4066Sahrens * 4 | vdev3 | GRID | ASIZE | 132*fa9e4066Sahrens * +-------+-------+-------+-------+-------+-------+-------+-------+ 133*fa9e4066Sahrens * 5 |G| offset3 | 134*fa9e4066Sahrens * +-------+-------+-------+-------+-------+-------+-------+-------+ 135*fa9e4066Sahrens * 6 |E| lvl | type | cksum | comp | PSIZE | LSIZE | 136*fa9e4066Sahrens * +-------+-------+-------+-------+-------+-------+-------+-------+ 137*fa9e4066Sahrens * 7 | padding | 138*fa9e4066Sahrens * +-------+-------+-------+-------+-------+-------+-------+-------+ 139*fa9e4066Sahrens * 8 | padding | 140*fa9e4066Sahrens * +-------+-------+-------+-------+-------+-------+-------+-------+ 141*fa9e4066Sahrens * 9 | padding | 142*fa9e4066Sahrens * +-------+-------+-------+-------+-------+-------+-------+-------+ 143*fa9e4066Sahrens * a | birth txg | 144*fa9e4066Sahrens * +-------+-------+-------+-------+-------+-------+-------+-------+ 145*fa9e4066Sahrens * b | fill count | 146*fa9e4066Sahrens * +-------+-------+-------+-------+-------+-------+-------+-------+ 147*fa9e4066Sahrens * c | checksum[0] | 148*fa9e4066Sahrens * +-------+-------+-------+-------+-------+-------+-------+-------+ 149*fa9e4066Sahrens * d | checksum[1] | 150*fa9e4066Sahrens * +-------+-------+-------+-------+-------+-------+-------+-------+ 151*fa9e4066Sahrens * e | checksum[2] | 152*fa9e4066Sahrens * +-------+-------+-------+-------+-------+-------+-------+-------+ 153*fa9e4066Sahrens * f | checksum[3] | 154*fa9e4066Sahrens * +-------+-------+-------+-------+-------+-------+-------+-------+ 155*fa9e4066Sahrens * 156*fa9e4066Sahrens * Legend: 157*fa9e4066Sahrens * 158*fa9e4066Sahrens * vdev virtual device ID 159*fa9e4066Sahrens * offset offset into virtual device 160*fa9e4066Sahrens * LSIZE logical size 161*fa9e4066Sahrens * PSIZE physical size (after compression) 162*fa9e4066Sahrens * ASIZE allocated size (including RAID-Z parity and gang block headers) 163*fa9e4066Sahrens * GRID RAID-Z layout information (reserved for future use) 164*fa9e4066Sahrens * cksum checksum function 165*fa9e4066Sahrens * comp compression function 166*fa9e4066Sahrens * G gang block indicator 167*fa9e4066Sahrens * E endianness 168*fa9e4066Sahrens * type DMU object type 169*fa9e4066Sahrens * lvl level of indirection 170*fa9e4066Sahrens * birth txg transaction group in which the block was born 171*fa9e4066Sahrens * fill count number of non-zero blocks under this bp 172*fa9e4066Sahrens * checksum[4] 256-bit checksum of the data this bp describes 173*fa9e4066Sahrens */ 174*fa9e4066Sahrens typedef struct blkptr { 175*fa9e4066Sahrens dva_t blk_dva[3]; /* 128-bit Data Virtual Address */ 176*fa9e4066Sahrens uint64_t blk_prop; /* size, compression, type, etc */ 177*fa9e4066Sahrens uint64_t blk_pad[3]; /* Extra space for the future */ 178*fa9e4066Sahrens uint64_t blk_birth; /* transaction group at birth */ 179*fa9e4066Sahrens uint64_t blk_fill; /* fill count */ 180*fa9e4066Sahrens zio_cksum_t blk_cksum; /* 256-bit checksum */ 181*fa9e4066Sahrens } blkptr_t; 182*fa9e4066Sahrens 183*fa9e4066Sahrens #define SPA_BLKPTRSHIFT 7 /* blkptr_t is 128 bytes */ 184*fa9e4066Sahrens #define SPA_DVAS_PER_BP 3 /* Number of DVAs in a bp */ 185*fa9e4066Sahrens 186*fa9e4066Sahrens /* 187*fa9e4066Sahrens * Macros to get and set fields in a bp or DVA. 188*fa9e4066Sahrens */ 189*fa9e4066Sahrens #define DVA_GET_ASIZE(dva) \ 190*fa9e4066Sahrens BF64_GET_SB((dva)->dva_word[0], 0, 24, SPA_MINBLOCKSHIFT, 0) 191*fa9e4066Sahrens #define DVA_SET_ASIZE(dva, x) \ 192*fa9e4066Sahrens BF64_SET_SB((dva)->dva_word[0], 0, 24, SPA_MINBLOCKSHIFT, 0, x) 193*fa9e4066Sahrens 194*fa9e4066Sahrens #define DVA_GET_GRID(dva) BF64_GET((dva)->dva_word[0], 24, 8) 195*fa9e4066Sahrens #define DVA_SET_GRID(dva, x) BF64_SET((dva)->dva_word[0], 24, 8, x) 196*fa9e4066Sahrens 197*fa9e4066Sahrens #define DVA_GET_VDEV(dva) BF64_GET((dva)->dva_word[0], 32, 32) 198*fa9e4066Sahrens #define DVA_SET_VDEV(dva, x) BF64_SET((dva)->dva_word[0], 32, 32, x) 199*fa9e4066Sahrens 200*fa9e4066Sahrens #define DVA_GET_OFFSET(dva) \ 201*fa9e4066Sahrens BF64_GET_SB((dva)->dva_word[1], 0, 63, SPA_MINBLOCKSHIFT, 0) 202*fa9e4066Sahrens #define DVA_SET_OFFSET(dva, x) \ 203*fa9e4066Sahrens BF64_SET_SB((dva)->dva_word[1], 0, 63, SPA_MINBLOCKSHIFT, 0, x) 204*fa9e4066Sahrens 205*fa9e4066Sahrens #define DVA_GET_GANG(dva) BF64_GET((dva)->dva_word[1], 63, 1) 206*fa9e4066Sahrens #define DVA_SET_GANG(dva, x) BF64_SET((dva)->dva_word[1], 63, 1, x) 207*fa9e4066Sahrens 208*fa9e4066Sahrens #define BP_GET_LSIZE(bp) \ 209*fa9e4066Sahrens (BP_IS_HOLE(bp) ? 0 : \ 210*fa9e4066Sahrens BF64_GET_SB((bp)->blk_prop, 0, 16, SPA_MINBLOCKSHIFT, 1)) 211*fa9e4066Sahrens #define BP_SET_LSIZE(bp, x) \ 212*fa9e4066Sahrens BF64_SET_SB((bp)->blk_prop, 0, 16, SPA_MINBLOCKSHIFT, 1, x) 213*fa9e4066Sahrens 214*fa9e4066Sahrens #define BP_GET_PSIZE(bp) \ 215*fa9e4066Sahrens BF64_GET_SB((bp)->blk_prop, 16, 16, SPA_MINBLOCKSHIFT, 1) 216*fa9e4066Sahrens #define BP_SET_PSIZE(bp, x) \ 217*fa9e4066Sahrens BF64_SET_SB((bp)->blk_prop, 16, 16, SPA_MINBLOCKSHIFT, 1, x) 218*fa9e4066Sahrens 219*fa9e4066Sahrens #define BP_GET_COMPRESS(bp) BF64_GET((bp)->blk_prop, 32, 8) 220*fa9e4066Sahrens #define BP_SET_COMPRESS(bp, x) BF64_SET((bp)->blk_prop, 32, 8, x) 221*fa9e4066Sahrens 222*fa9e4066Sahrens #define BP_GET_CHECKSUM(bp) BF64_GET((bp)->blk_prop, 40, 8) 223*fa9e4066Sahrens #define BP_SET_CHECKSUM(bp, x) BF64_SET((bp)->blk_prop, 40, 8, x) 224*fa9e4066Sahrens 225*fa9e4066Sahrens #define BP_GET_TYPE(bp) BF64_GET((bp)->blk_prop, 48, 8) 226*fa9e4066Sahrens #define BP_SET_TYPE(bp, x) BF64_SET((bp)->blk_prop, 48, 8, x) 227*fa9e4066Sahrens 228*fa9e4066Sahrens #define BP_GET_LEVEL(bp) BF64_GET((bp)->blk_prop, 56, 5) 229*fa9e4066Sahrens #define BP_SET_LEVEL(bp, x) BF64_SET((bp)->blk_prop, 56, 5, x) 230*fa9e4066Sahrens 231*fa9e4066Sahrens #define BP_GET_BYTEORDER(bp) (0 - BF64_GET((bp)->blk_prop, 63, 1)) 232*fa9e4066Sahrens #define BP_SET_BYTEORDER(bp, x) BF64_SET((bp)->blk_prop, 63, 1, x) 233*fa9e4066Sahrens 234*fa9e4066Sahrens #define BP_GET_ASIZE(bp) \ 235*fa9e4066Sahrens (DVA_GET_ASIZE(&(bp)->blk_dva[0]) + DVA_GET_ASIZE(&(bp)->blk_dva[1]) + \ 236*fa9e4066Sahrens DVA_GET_ASIZE(&(bp)->blk_dva[2])) 237*fa9e4066Sahrens 238*fa9e4066Sahrens #define DVA_EQUAL(dva1, dva2) \ 239*fa9e4066Sahrens ((dva1)->dva_word[1] == (dva2)->dva_word[1] && \ 240*fa9e4066Sahrens (dva1)->dva_word[0] == (dva2)->dva_word[0]) 241*fa9e4066Sahrens 242*fa9e4066Sahrens #define DVA_IS_VALID(dva) (DVA_GET_ASIZE(dva) != 0) 243*fa9e4066Sahrens 244*fa9e4066Sahrens #define ZIO_SET_CHECKSUM(zcp, w0, w1, w2, w3) \ 245*fa9e4066Sahrens { \ 246*fa9e4066Sahrens (zcp)->zc_word[0] = w0; \ 247*fa9e4066Sahrens (zcp)->zc_word[1] = w1; \ 248*fa9e4066Sahrens (zcp)->zc_word[2] = w2; \ 249*fa9e4066Sahrens (zcp)->zc_word[3] = w3; \ 250*fa9e4066Sahrens } 251*fa9e4066Sahrens 252*fa9e4066Sahrens #define BP_IS_HOLE(bp) ((bp)->blk_birth == 0) 253*fa9e4066Sahrens 254*fa9e4066Sahrens #define BP_IDENTITY(bp) (&(bp)->blk_dva[0]) 255*fa9e4066Sahrens 256*fa9e4066Sahrens #define BP_ZERO(bp) \ 257*fa9e4066Sahrens { \ 258*fa9e4066Sahrens (bp)->blk_dva[0].dva_word[0] = 0; \ 259*fa9e4066Sahrens (bp)->blk_dva[0].dva_word[1] = 0; \ 260*fa9e4066Sahrens (bp)->blk_dva[1].dva_word[0] = 0; \ 261*fa9e4066Sahrens (bp)->blk_dva[1].dva_word[1] = 0; \ 262*fa9e4066Sahrens (bp)->blk_dva[2].dva_word[0] = 0; \ 263*fa9e4066Sahrens (bp)->blk_dva[2].dva_word[1] = 0; \ 264*fa9e4066Sahrens (bp)->blk_prop = 0; \ 265*fa9e4066Sahrens (bp)->blk_pad[0] = 0; \ 266*fa9e4066Sahrens (bp)->blk_pad[1] = 0; \ 267*fa9e4066Sahrens (bp)->blk_pad[2] = 0; \ 268*fa9e4066Sahrens (bp)->blk_birth = 0; \ 269*fa9e4066Sahrens (bp)->blk_fill = 0; \ 270*fa9e4066Sahrens ZIO_SET_CHECKSUM(&(bp)->blk_cksum, 0, 0, 0, 0); \ 271*fa9e4066Sahrens } 272*fa9e4066Sahrens 273*fa9e4066Sahrens /* 274*fa9e4066Sahrens * Note: the byteorder is either 0 or -1, both of which are palindromes. 275*fa9e4066Sahrens * This simplifies the endianness handling a bit. 276*fa9e4066Sahrens */ 277*fa9e4066Sahrens #ifdef _BIG_ENDIAN 278*fa9e4066Sahrens #define ZFS_HOST_BYTEORDER (0ULL) 279*fa9e4066Sahrens #else 280*fa9e4066Sahrens #define ZFS_HOST_BYTEORDER (-1ULL) 281*fa9e4066Sahrens #endif 282*fa9e4066Sahrens 283*fa9e4066Sahrens #define BP_SHOULD_BYTESWAP(bp) (BP_GET_BYTEORDER(bp) != ZFS_HOST_BYTEORDER) 284*fa9e4066Sahrens 285*fa9e4066Sahrens #include <sys/dmu.h> 286*fa9e4066Sahrens 287*fa9e4066Sahrens /* 288*fa9e4066Sahrens * Routines found in spa.c 289*fa9e4066Sahrens */ 290*fa9e4066Sahrens 291*fa9e4066Sahrens /* state manipulation functions */ 292*fa9e4066Sahrens extern int spa_open(const char *pool, spa_t **, void *tag); 293*fa9e4066Sahrens extern int spa_get_stats(const char *pool, nvlist_t **config); 294*fa9e4066Sahrens extern int spa_create(const char *pool, nvlist_t *config, char *altroot); 295*fa9e4066Sahrens extern int spa_import(const char *pool, nvlist_t *config, char *altroot); 296*fa9e4066Sahrens extern nvlist_t *spa_tryimport(nvlist_t *tryconfig); 297*fa9e4066Sahrens extern int spa_destroy(char *pool); 298*fa9e4066Sahrens extern int spa_export(char *pool); 299*fa9e4066Sahrens 300*fa9e4066Sahrens /* device manipulation */ 301*fa9e4066Sahrens extern int spa_vdev_add(spa_t *spa, nvlist_t *nvroot); 302*fa9e4066Sahrens extern int spa_vdev_add_unlocked(spa_t *spa, nvlist_t *nvroot); 303*fa9e4066Sahrens extern int spa_vdev_attach(spa_t *spa, const char *path, nvlist_t *nvroot, 304*fa9e4066Sahrens int replacing); 305*fa9e4066Sahrens extern int spa_vdev_detach(spa_t *spa, const char *path, uint64_t guid, 306*fa9e4066Sahrens int replace_done); 307*fa9e4066Sahrens extern void spa_vdev_replace_done(spa_t *spa); 308*fa9e4066Sahrens 309*fa9e4066Sahrens /* scrubbing */ 310*fa9e4066Sahrens extern int spa_scrub(spa_t *spa, pool_scrub_type_t type, boolean_t force); 311*fa9e4066Sahrens extern void spa_scrub_suspend(spa_t *spa); 312*fa9e4066Sahrens extern void spa_scrub_resume(spa_t *spa); 313*fa9e4066Sahrens extern void spa_scrub_restart(spa_t *spa, uint64_t txg); 314*fa9e4066Sahrens 315*fa9e4066Sahrens /* spa syncing */ 316*fa9e4066Sahrens extern void spa_sync(spa_t *spa, uint64_t txg); /* only for DMU use */ 317*fa9e4066Sahrens extern void spa_sync_allpools(void); 318*fa9e4066Sahrens 319*fa9e4066Sahrens /* 320*fa9e4066Sahrens * SPA configuration functions in spa_config.c 321*fa9e4066Sahrens */ 322*fa9e4066Sahrens extern void spa_config_sync(void); 323*fa9e4066Sahrens extern void spa_config_load(void); 324*fa9e4066Sahrens extern nvlist_t *spa_all_configs(uint64_t *); 325*fa9e4066Sahrens extern void spa_config_set(spa_t *spa, nvlist_t *config); 326*fa9e4066Sahrens extern nvlist_t *spa_config_generate(spa_t *spa, vdev_t *vd, uint64_t txg, 327*fa9e4066Sahrens int getstats); 328*fa9e4066Sahrens 329*fa9e4066Sahrens /* 330*fa9e4066Sahrens * Miscellaneous SPA routines in spa_misc.c 331*fa9e4066Sahrens */ 332*fa9e4066Sahrens 333*fa9e4066Sahrens /* Namespace manipulation */ 334*fa9e4066Sahrens extern spa_t *spa_lookup(const char *name); 335*fa9e4066Sahrens extern spa_t *spa_add(const char *name); 336*fa9e4066Sahrens extern void spa_remove(spa_t *spa); 337*fa9e4066Sahrens extern spa_t *spa_next(spa_t *prev); 338*fa9e4066Sahrens 339*fa9e4066Sahrens /* Refcount functions */ 340*fa9e4066Sahrens extern void spa_open_ref(spa_t *spa, void *tag); 341*fa9e4066Sahrens extern void spa_close(spa_t *spa, void *tag); 342*fa9e4066Sahrens extern boolean_t spa_refcount_zero(spa_t *spa); 343*fa9e4066Sahrens 344*fa9e4066Sahrens /* Pool configuration lock */ 345*fa9e4066Sahrens extern void spa_config_enter(spa_t *spa, krw_t rw); 346*fa9e4066Sahrens extern void spa_config_exit(spa_t *spa); 347*fa9e4066Sahrens extern boolean_t spa_config_held(spa_t *spa, krw_t rw); 348*fa9e4066Sahrens 349*fa9e4066Sahrens /* Pool vdev add/remove lock */ 350*fa9e4066Sahrens extern uint64_t spa_vdev_enter(spa_t *spa); 351*fa9e4066Sahrens extern int spa_vdev_exit(spa_t *spa, vdev_t *vd, uint64_t txg, int error); 352*fa9e4066Sahrens 353*fa9e4066Sahrens /* Accessor functions */ 354*fa9e4066Sahrens extern krwlock_t *spa_traverse_rwlock(spa_t *spa); 355*fa9e4066Sahrens extern int spa_traverse_wanted(spa_t *spa); 356*fa9e4066Sahrens extern struct dsl_pool *spa_get_dsl(spa_t *spa); 357*fa9e4066Sahrens extern blkptr_t *spa_get_rootblkptr(spa_t *spa); 358*fa9e4066Sahrens extern void spa_set_rootblkptr(spa_t *spa, const blkptr_t *bp); 359*fa9e4066Sahrens extern void spa_altroot(spa_t *, char *, size_t); 360*fa9e4066Sahrens extern int spa_sync_pass(spa_t *spa); 361*fa9e4066Sahrens extern char *spa_name(spa_t *spa); 362*fa9e4066Sahrens extern uint64_t spa_guid(spa_t *spa); 363*fa9e4066Sahrens extern uint64_t spa_last_synced_txg(spa_t *spa); 364*fa9e4066Sahrens extern uint64_t spa_first_txg(spa_t *spa); 365*fa9e4066Sahrens extern int spa_state(spa_t *spa); 366*fa9e4066Sahrens extern uint64_t spa_freeze_txg(spa_t *spa); 367*fa9e4066Sahrens struct metaslab_class; 368*fa9e4066Sahrens extern struct metaslab_class *spa_metaslab_class_select(spa_t *spa); 369*fa9e4066Sahrens extern uint64_t spa_get_alloc(spa_t *spa); 370*fa9e4066Sahrens extern uint64_t spa_get_space(spa_t *spa); 371*fa9e4066Sahrens extern uint64_t spa_get_asize(spa_t *spa, uint64_t lsize); 372*fa9e4066Sahrens extern int spa_busy(void); 373*fa9e4066Sahrens 374*fa9e4066Sahrens /* Miscellaneous support routines */ 375*fa9e4066Sahrens extern int spa_rename(const char *oldname, const char *newname); 376*fa9e4066Sahrens extern boolean_t spa_guid_exists(uint64_t pool_guid, uint64_t device_guid); 377*fa9e4066Sahrens extern char *spa_strdup(const char *); 378*fa9e4066Sahrens extern void spa_strfree(char *); 379*fa9e4066Sahrens extern uint64_t spa_get_random(uint64_t range); 380*fa9e4066Sahrens extern void sprintf_blkptr(char *buf, blkptr_t *bp); 381*fa9e4066Sahrens extern void spa_freeze(spa_t *spa); 382*fa9e4066Sahrens extern void spa_evict_all(void); 383*fa9e4066Sahrens 384*fa9e4066Sahrens /* Initialization and termination */ 385*fa9e4066Sahrens extern void spa_init(int flags); 386*fa9e4066Sahrens extern void spa_fini(void); 387*fa9e4066Sahrens 388*fa9e4066Sahrens #ifdef ZFS_DEBUG 389*fa9e4066Sahrens #define dprintf_bp(bp, fmt, ...) do { \ 390*fa9e4066Sahrens if (zfs_flags & ZFS_DEBUG_DPRINTF) { \ 391*fa9e4066Sahrens char __blkbuf[200]; \ 392*fa9e4066Sahrens sprintf_blkptr(__blkbuf, (bp)); \ 393*fa9e4066Sahrens dprintf(fmt " %s\n", __VA_ARGS__, __blkbuf); \ 394*fa9e4066Sahrens } \ 395*fa9e4066Sahrens _NOTE(CONSTCOND) } while (0) 396*fa9e4066Sahrens #else 397*fa9e4066Sahrens #define dprintf_bp(bp, fmt, ...) 398*fa9e4066Sahrens #endif 399*fa9e4066Sahrens 400*fa9e4066Sahrens extern int spa_mode; /* mode, e.g. FREAD | FWRITE */ 401*fa9e4066Sahrens 402*fa9e4066Sahrens #ifdef __cplusplus 403*fa9e4066Sahrens } 404*fa9e4066Sahrens #endif 405*fa9e4066Sahrens 406*fa9e4066Sahrens #endif /* _SYS_SPA_H */ 407